nvme-core.c revision 61e4ce086df0a64a555880089e3b782517c828c0
1b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 2b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * NVM Express device driver 36eb0d698efa9c2a35ec3ca958699717c603f85eeMatthew Wilcox * Copyright (c) 2011-2014, Intel Corporation. 4b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 5b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * This program is free software; you can redistribute it and/or modify it 6b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * under the terms and conditions of the GNU General Public License, 7b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * version 2, as published by the Free Software Foundation. 8b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 9b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * This program is distributed in the hope it will be useful, but WITHOUT 10b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * more details. 13b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 14b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/nvme.h> 16b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/bio.h> 178de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox#include <linux/bitops.h> 18b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/blkdev.h> 1942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch#include <linux/cpu.h> 20fd63e9ceeeae58cfe877c2d49d41c1bf7532303cMatthew Wilcox#include <linux/delay.h> 21b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/errno.h> 22b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/fs.h> 23b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/genhd.h> 244cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch#include <linux/hdreg.h> 255aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox#include <linux/idr.h> 26b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/init.h> 27b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/interrupt.h> 28b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/io.h> 29b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/kdev_t.h> 301fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox#include <linux/kthread.h> 31b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/kernel.h> 32b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/mm.h> 33b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/module.h> 34b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/moduleparam.h> 35b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/pci.h> 3642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch#include <linux/percpu.h> 37be7b62754e097adc0cb16c25c9ee86ee20de62fbMatthew Wilcox#include <linux/poison.h> 38c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox#include <linux/ptrace.h> 39b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/sched.h> 40b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/slab.h> 41b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/types.h> 425d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma#include <scsi/sg.h> 43797a796a13df6b84a4791e57306737059b5b2384Hitoshi Mitake#include <asm-generic/io-64-nonatomic-lo-hi.h> 44797a796a13df6b84a4791e57306737059b5b2384Hitoshi Mitake 453291fa57cb1b004c1a4823beb28b5cc72555f1a5Keith Busch#include <trace/events/block.h> 463291fa57cb1b004c1a4823beb28b5cc72555f1a5Keith Busch 47b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define NVME_Q_DEPTH 1024 48b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) 49b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) 50e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox#define ADMIN_TIMEOUT (60 * HZ) 5161e4ce086df0a64a555880089e3b782517c828c0Keith Busch#define IOD_TIMEOUT (retry_time * HZ) 52b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 53b355084a891985d4cd0ca23b1a83366af2c4232dKeith Buschunsigned char io_timeout = 30; 54b355084a891985d4cd0ca23b1a83366af2c4232dKeith Buschmodule_param(io_timeout, byte, 0644); 55b355084a891985d4cd0ca23b1a83366af2c4232dKeith BuschMODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O"); 56b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5761e4ce086df0a64a555880089e3b782517c828c0Keith Buschstatic unsigned char retry_time = 30; 5861e4ce086df0a64a555880089e3b782517c828c0Keith Buschmodule_param(retry_time, byte, 0644); 5961e4ce086df0a64a555880089e3b782517c828c0Keith BuschMODULE_PARM_DESC(retry_time, "time in seconds to retry failed I/O"); 6061e4ce086df0a64a555880089e3b782517c828c0Keith Busch 61b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_major; 62b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_param(nvme_major, int, 0); 63b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic int use_threaded_interrupts; 6558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxmodule_param(use_threaded_interrupts, int, 0); 6658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 671fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic DEFINE_SPINLOCK(dev_list_lock); 681fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic LIST_HEAD(dev_list); 691fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic struct task_struct *nvme_thread; 709a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic struct workqueue_struct *nvme_workq; 71b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeranstatic wait_queue_head_t nvme_kthread_wait; 721fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 73d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Buschstatic void nvme_reset_failed_dev(struct work_struct *ws); 74d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch 754d115420707afcabe77d2535e092356df6664b70Keith Buschstruct async_cmd_info { 764d115420707afcabe77d2535e092356df6664b70Keith Busch struct kthread_work work; 774d115420707afcabe77d2535e092356df6664b70Keith Busch struct kthread_worker *worker; 784d115420707afcabe77d2535e092356df6664b70Keith Busch u32 result; 794d115420707afcabe77d2535e092356df6664b70Keith Busch int status; 804d115420707afcabe77d2535e092356df6664b70Keith Busch void *ctx; 814d115420707afcabe77d2535e092356df6664b70Keith Busch}; 821fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 83b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 84b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * An NVM Express queue. Each device has at least two (one for admin 85b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * commands and one for I/O commands). 86b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 87b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstruct nvme_queue { 885a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct rcu_head r_head; 89b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *q_dmadev; 90091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct nvme_dev *dev; 913193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox char irqname[24]; /* nvme4294967295-65535\0 */ 92b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spinlock_t q_lock; 93b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command *sq_cmds; 94b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox volatile struct nvme_completion *cqes; 95b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t sq_dma_addr; 96b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t cq_dma_addr; 97b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_queue_head_t sq_full; 981fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox wait_queue_t sq_cong_wait; 99b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio_list sq_cong; 100edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct list_head iod_bio; 101b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 __iomem *q_db; 102b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 q_depth; 103b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_vector; 104b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_head; 105b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_tail; 106b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_head; 107c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch u16 qid; 108e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox u8 cq_phase; 109e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox u8 cqe_seen; 110224042742582c9938788b81165180c876e997a07Keith Busch u8 q_suspended; 11142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_var_t cpu_mask; 1124d115420707afcabe77d2535e092356df6664b70Keith Busch struct async_cmd_info cmdinfo; 113b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long cmdid_data[]; 114b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 115b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 116b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 117b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Check we didin't inadvertently grow the command struct 118b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 119b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic inline void _nvme_check_size(void) 120b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 121b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); 122b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); 123b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); 124b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); 125b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_features) != 64); 126f8ebf8409abfdaeeb8c847381629a2a8b8e3d816Vishal Verma BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); 127c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); 128b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_command) != 64); 129b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); 130b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); 131b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); 1326ecec74520d8a357726e6c12f99080dbe7b347ddKeith Busch BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); 133b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 134b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 135edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschtypedef void (*nvme_completion_fn)(struct nvme_queue *, void *, 136c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *); 137c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 138e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstruct nvme_cmd_info { 139c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 140c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 141e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox unsigned long timeout; 142c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch int aborted; 143e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox}; 144e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 145e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstatic struct nvme_cmd_info *nvme_cmd_info(struct nvme_queue *nvmeq) 146e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox{ 147e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return (void *)&nvmeq->cmdid_data[BITS_TO_LONGS(nvmeq->q_depth)]; 148e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox} 149e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 150224042742582c9938788b81165180c876e997a07Keith Buschstatic unsigned nvme_queue_extra(int depth) 151224042742582c9938788b81165180c876e997a07Keith Busch{ 152224042742582c9938788b81165180c876e997a07Keith Busch return DIV_ROUND_UP(depth, 8) + (depth * sizeof(struct nvme_cmd_info)); 153224042742582c9938788b81165180c876e997a07Keith Busch} 154224042742582c9938788b81165180c876e997a07Keith Busch 155b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 156714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * alloc_cmdid() - Allocate a Command ID 157714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @nvmeq: The queue that will be used for this command 158714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @ctx: A pointer that will be passed to the handler 159c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox * @handler: The function to call on completion 160b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 161b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Allocate a Command ID for a queue. The data passed in will 162b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * be passed to the completion handler. This is implemented by using 163b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the bottom two bits of the ctx pointer to store the handler ID. 164b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Passing in a pointer that's not 4-byte aligned will cause a BUG. 165b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * We can change this if it becomes a problem. 166184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * 167184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * May be called with local interrupts disabled and the q_lock held, 168184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * or with interrupts enabled and no locks held. 169b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 170c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic int alloc_cmdid(struct nvme_queue *nvmeq, void *ctx, 171c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 172b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 173e6d15f79f997a98b3a69abbc462fc9041cc1a7b4Matthew Wilcox int depth = nvmeq->q_depth - 1; 174e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 175b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 176b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 177b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox do { 178b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdid = find_first_zero_bit(nvmeq->cmdid_data, depth); 179b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid >= depth) 180b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EBUSY; 181b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } while (test_and_set_bit(cmdid, nvmeq->cmdid_data)); 182b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 183c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = handler; 184c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].ctx = ctx; 185e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].timeout = jiffies + timeout; 186c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch info[cmdid].aborted = 0; 187b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 188b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 189b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 190b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int alloc_cmdid_killable(struct nvme_queue *nvmeq, void *ctx, 191c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 192b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 193b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 194b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_event_killable(nvmeq->sq_full, 195e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox (cmdid = alloc_cmdid(nvmeq, ctx, handler, timeout)) >= 0); 196b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return (cmdid < 0) ? -EINTR : cmdid; 197b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 198b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 199c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox/* Special values must be less than 0x1000 */ 200c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox#define CMD_CTX_BASE ((void *)POISON_POINTER_DELTA) 201d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_CANCELLED (0x30C + CMD_CTX_BASE) 202d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_COMPLETED (0x310 + CMD_CTX_BASE) 203d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_INVALID (0x314 + CMD_CTX_BASE) 20453562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch#define CMD_CTX_ABORT (0x318 + CMD_CTX_BASE) 205be7b62754e097adc0cb16c25c9ee86ee20de62fbMatthew Wilcox 206edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschstatic void special_completion(struct nvme_queue *nvmeq, void *ctx, 207c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 208c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 209c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_CANCELLED) 210c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 211c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (ctx == CMD_CTX_ABORT) { 212edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch ++nvmeq->dev->abort_limit; 213c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 214c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch } 215c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_COMPLETED) { 216edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch dev_warn(nvmeq->q_dmadev, 217c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "completed id %d twice on queue %d\n", 218c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 219c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 220c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 221c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_INVALID) { 222edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch dev_warn(nvmeq->q_dmadev, 223c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "invalid id %d completed on queue %d\n", 224c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 225c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 226c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 227c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 228edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch dev_warn(nvmeq->q_dmadev, "Unknown special completion %p\n", ctx); 229c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 230c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 231edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschstatic void async_completion(struct nvme_queue *nvmeq, void *ctx, 2324d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_completion *cqe) 2334d115420707afcabe77d2535e092356df6664b70Keith Busch{ 2344d115420707afcabe77d2535e092356df6664b70Keith Busch struct async_cmd_info *cmdinfo = ctx; 2354d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo->result = le32_to_cpup(&cqe->result); 2364d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 2374d115420707afcabe77d2535e092356df6664b70Keith Busch queue_kthread_work(cmdinfo->worker, &cmdinfo->work); 2384d115420707afcabe77d2535e092356df6664b70Keith Busch} 2394d115420707afcabe77d2535e092356df6664b70Keith Busch 240184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 241184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 242184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 243c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *free_cmdid(struct nvme_queue *nvmeq, int cmdid, 244c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 245b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 246c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 247e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 248b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 24994bbac4052eb93219ca0aa370ca741486b25fb98Keith Busch if (cmdid >= nvmeq->q_depth || !info[cmdid].fn) { 25094bbac4052eb93219ca0aa370ca741486b25fb98Keith Busch if (fn) 25194bbac4052eb93219ca0aa370ca741486b25fb98Keith Busch *fn = special_completion; 25248e3d39816416b3bf03dee3a796c0c04427c1a31Matthew Wilcox return CMD_CTX_INVALID; 253c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 254859361a228258edf4821d9f5635825033eca78e8Keith Busch if (fn) 255859361a228258edf4821d9f5635825033eca78e8Keith Busch *fn = info[cmdid].fn; 256c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 257c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 258e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_COMPLETED; 259b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox clear_bit(cmdid, nvmeq->cmdid_data); 260b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wake_up(&nvmeq->sq_full); 261c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 262b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 263b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 264c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *cancel_cmdid(struct nvme_queue *nvmeq, int cmdid, 265c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 2663c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 267c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 268e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 269c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (fn) 270c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = info[cmdid].fn; 271c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 272c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 273e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_CANCELLED; 274c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 2753c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 2763c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 2775a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Buschstatic struct nvme_queue *raw_nvmeq(struct nvme_dev *dev, int qid) 278b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2795a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch return rcu_dereference_raw(dev->queues[qid]); 280b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 281b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2824f5099af4f3d5f999d8ab7784472d93e810e3912Keith Buschstatic struct nvme_queue *get_nvmeq(struct nvme_dev *dev) __acquires(RCU) 2835a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch{ 28442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch unsigned queue_id = get_cpu_var(*dev->io_queue); 2855a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_read_lock(); 28642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch return rcu_dereference(dev->queues[queue_id]); 2875a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch} 2885a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch 2894f5099af4f3d5f999d8ab7784472d93e810e3912Keith Buschstatic void put_nvmeq(struct nvme_queue *nvmeq) __releases(RCU) 290b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2915a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_read_unlock(); 29242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch put_cpu_var(nvmeq->dev->io_queue); 293b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 294b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2954f5099af4f3d5f999d8ab7784472d93e810e3912Keith Buschstatic struct nvme_queue *lock_nvmeq(struct nvme_dev *dev, int q_idx) 2964f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch __acquires(RCU) 297b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2984f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch rcu_read_lock(); 2994f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch return rcu_dereference(dev->queues[q_idx]); 3004f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch} 3014f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch 3024f5099af4f3d5f999d8ab7784472d93e810e3912Keith Buschstatic void unlock_nvmeq(struct nvme_queue *nvmeq) __releases(RCU) 3034f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch{ 3044f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch rcu_read_unlock(); 305b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 306b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 307b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 308714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * nvme_submit_cmd() - Copy a command into a queue and ring the doorbell 309b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @nvmeq: The queue to use 310b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @cmd: The command to send 311b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 312b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Safe to use from interrupt context 313b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 314b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) 315b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 316b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long flags; 317b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 tail; 318b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_irqsave(&nvmeq->q_lock, flags); 3194f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch if (nvmeq->q_suspended) { 3204f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch spin_unlock_irqrestore(&nvmeq->q_lock, flags); 3214f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch return -EBUSY; 3224f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch } 323b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = nvmeq->sq_tail; 324b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); 325b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++tail == nvmeq->q_depth) 326b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = 0; 3277547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(tail, nvmeq->q_db); 328b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = tail; 329b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_unlock_irqrestore(&nvmeq->q_lock, flags); 330b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 331b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 332b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 333b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 334eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic __le64 **iod_list(struct nvme_iod *iod) 335e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews{ 336eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ((void *)iod) + iod->offset; 337e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews} 338e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 339eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox/* 340eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * Will slightly overestimate the number of pages needed. This is OK 341eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * as it only leads to a small amount of wasted memory for the lifetime of 342eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * the I/O. 343eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox */ 344eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_npages(unsigned size) 345eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox{ 346eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned nprps = DIV_ROUND_UP(size + PAGE_SIZE, PAGE_SIZE); 347eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); 348eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox} 349b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 350eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic struct nvme_iod * 351eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxnvme_alloc_iod(unsigned nseg, unsigned nbytes, gfp_t gfp) 352b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 353eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + 354eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(__le64 *) * nvme_npages(nbytes) + 355eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(struct scatterlist) * nseg, gfp); 356eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 357eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod) { 358eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->offset = offsetof(struct nvme_iod, sg[nseg]); 359eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 360eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->length = nbytes; 3612b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch iod->nents = 0; 362edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch iod->first_dma = 0ULL; 3636198221fa0df0298513b35796f63f242ea97134eKeith Busch iod->start_time = jiffies; 364eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 365eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 366eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 367b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 368b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3695d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) 370b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 371eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox const int last_prp = PAGE_SIZE / 8 - 1; 372eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int i; 373eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 374eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t prp_dma = iod->first_dma; 375eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 376eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod->npages == 0) 377eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_small_pool, list[0], prp_dma); 378eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox for (i = 0; i < iod->npages; i++) { 379eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 *prp_list = list[i]; 380eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); 381eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); 382eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox prp_dma = next_prp_dma; 383eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 384eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 385b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 386b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3876198221fa0df0298513b35796f63f242ea97134eKeith Buschstatic void nvme_start_io_acct(struct bio *bio) 3886198221fa0df0298513b35796f63f242ea97134eKeith Busch{ 3896198221fa0df0298513b35796f63f242ea97134eKeith Busch struct gendisk *disk = bio->bi_bdev->bd_disk; 3906198221fa0df0298513b35796f63f242ea97134eKeith Busch const int rw = bio_data_dir(bio); 3916198221fa0df0298513b35796f63f242ea97134eKeith Busch int cpu = part_stat_lock(); 3926198221fa0df0298513b35796f63f242ea97134eKeith Busch part_round_stats(cpu, &disk->part0); 3936198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_inc(cpu, &disk->part0, ios[rw]); 3946198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_add(cpu, &disk->part0, sectors[rw], bio_sectors(bio)); 3956198221fa0df0298513b35796f63f242ea97134eKeith Busch part_inc_in_flight(&disk->part0, rw); 3966198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_unlock(); 3976198221fa0df0298513b35796f63f242ea97134eKeith Busch} 3986198221fa0df0298513b35796f63f242ea97134eKeith Busch 3996198221fa0df0298513b35796f63f242ea97134eKeith Buschstatic void nvme_end_io_acct(struct bio *bio, unsigned long start_time) 4006198221fa0df0298513b35796f63f242ea97134eKeith Busch{ 4016198221fa0df0298513b35796f63f242ea97134eKeith Busch struct gendisk *disk = bio->bi_bdev->bd_disk; 4026198221fa0df0298513b35796f63f242ea97134eKeith Busch const int rw = bio_data_dir(bio); 4036198221fa0df0298513b35796f63f242ea97134eKeith Busch unsigned long duration = jiffies - start_time; 4046198221fa0df0298513b35796f63f242ea97134eKeith Busch int cpu = part_stat_lock(); 4056198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_add(cpu, &disk->part0, ticks[rw], duration); 4066198221fa0df0298513b35796f63f242ea97134eKeith Busch part_round_stats(cpu, &disk->part0); 4076198221fa0df0298513b35796f63f242ea97134eKeith Busch part_dec_in_flight(&disk->part0, rw); 4086198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_unlock(); 4096198221fa0df0298513b35796f63f242ea97134eKeith Busch} 4106198221fa0df0298513b35796f63f242ea97134eKeith Busch 411edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschstatic void bio_completion(struct nvme_queue *nvmeq, void *ctx, 412b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion *cqe) 413b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 414eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = ctx; 415eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct bio *bio = iod->private; 416b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 status = le16_to_cpup(&cqe->status) >> 1; 4173291fa57cb1b004c1a4823beb28b5cc72555f1a5Keith Busch int error = 0; 418b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 419edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (unlikely(status)) { 420edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!(status & NVME_SC_DNR || 421edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch bio->bi_rw & REQ_FAILFAST_MASK) && 422edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch (jiffies - iod->start_time) < IOD_TIMEOUT) { 423edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!waitqueue_active(&nvmeq->sq_full)) 424edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch add_wait_queue(&nvmeq->sq_full, 425edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch &nvmeq->sq_cong_wait); 426edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch list_add_tail(&iod->node, &nvmeq->iod_bio); 427edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch wake_up(&nvmeq->sq_full); 428edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch return; 429edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 4303291fa57cb1b004c1a4823beb28b5cc72555f1a5Keith Busch error = -EIO; 431edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 4329e59d091b0eb04f223ed037348e3d9e36f30e72bKeith Busch if (iod->nents) { 433edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch dma_unmap_sg(nvmeq->q_dmadev, iod->sg, iod->nents, 434b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_data_dir(bio) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 4359e59d091b0eb04f223ed037348e3d9e36f30e72bKeith Busch nvme_end_io_acct(bio, iod->start_time); 4369e59d091b0eb04f223ed037348e3d9e36f30e72bKeith Busch } 437edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch nvme_free_iod(nvmeq->dev, iod); 4383291fa57cb1b004c1a4823beb28b5cc72555f1a5Keith Busch 4393291fa57cb1b004c1a4823beb28b5cc72555f1a5Keith Busch trace_block_bio_complete(bdev_get_queue(bio->bi_bdev), bio, error); 4403291fa57cb1b004c1a4823beb28b5cc72555f1a5Keith Busch bio_endio(bio, error); 441b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 442b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 443184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* length is in bytes. gfp flags indicates whether we may sleep. */ 444edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschint nvme_setup_prps(struct nvme_dev *dev, struct nvme_iod *iod, int total_len, 445edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch gfp_t gfp) 446ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox{ 44799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox struct dma_pool *pool; 448eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int length = total_len; 449eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct scatterlist *sg = iod->sg; 450ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int dma_len = sg_dma_len(sg); 451ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox u64 dma_addr = sg_dma_address(sg); 452ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int offset = offset_in_page(dma_addr); 453e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *prp_list; 454eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 455e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr_t prp_dma; 456eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int nprps, i; 457ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 458ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox length -= (PAGE_SIZE - offset); 459ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= 0) 460eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 461ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 462ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len -= (PAGE_SIZE - offset); 463ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (dma_len) { 464ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr += (PAGE_SIZE - offset); 465ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } else { 466ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox sg = sg_next(sg); 467ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr = sg_dma_address(sg); 468ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len = sg_dma_len(sg); 469ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 470ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 471ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= PAGE_SIZE) { 472edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch iod->first_dma = dma_addr; 473eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 474e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 475e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 476e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews nprps = DIV_ROUND_UP(length, PAGE_SIZE); 47799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (nprps <= (256 / 8)) { 47899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_small_pool; 479eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 0; 48099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } else { 48199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_page_pool; 482eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 1; 48399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 48499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 485b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 486b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (!prp_list) { 487edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch iod->first_dma = dma_addr; 488eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 489eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return (total_len - length) + PAGE_SIZE; 490b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox } 491eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[0] = prp_list; 492eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->first_dma = prp_dma; 493e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews i = 0; 494e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews for (;;) { 4957523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox if (i == PAGE_SIZE / 8) { 496e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *old_prp_list = prp_list; 497b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 498eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!prp_list) 499eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len - length; 500eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[iod->npages++] = prp_list; 5017523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox prp_list[0] = old_prp_list[i - 1]; 5027523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox old_prp_list[i - 1] = cpu_to_le64(prp_dma); 5037523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox i = 1; 504e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 505e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews prp_list[i++] = cpu_to_le64(dma_addr); 506e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len -= PAGE_SIZE; 507e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr += PAGE_SIZE; 508e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews length -= PAGE_SIZE; 509e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (length <= 0) 510e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews break; 511e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (dma_len > 0) 512e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews continue; 513e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews BUG_ON(dma_len < 0); 514e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews sg = sg_next(sg); 515e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr = sg_dma_address(sg); 516e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len = sg_dma_len(sg); 517ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 518ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 519eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 520ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox} 521ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 522427e97080196548557b288517537ab7eb48c309fKeith Buschstatic int nvme_split_and_submit(struct bio *bio, struct nvme_queue *nvmeq, 52320d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet int len) 524427e97080196548557b288517537ab7eb48c309fKeith Busch{ 52520d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet struct bio *split = bio_split(bio, len >> 9, GFP_ATOMIC, NULL); 52620d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet if (!split) 527427e97080196548557b288517537ab7eb48c309fKeith Busch return -ENOMEM; 528427e97080196548557b288517537ab7eb48c309fKeith Busch 5293291fa57cb1b004c1a4823beb28b5cc72555f1a5Keith Busch trace_block_split(bdev_get_queue(bio->bi_bdev), bio, 5303291fa57cb1b004c1a4823beb28b5cc72555f1a5Keith Busch split->bi_iter.bi_sector); 53120d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet bio_chain(split, bio); 53220d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet 533edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!waitqueue_active(&nvmeq->sq_full)) 534427e97080196548557b288517537ab7eb48c309fKeith Busch add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 53520d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet bio_list_add(&nvmeq->sq_cong, split); 53620d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet bio_list_add(&nvmeq->sq_cong, bio); 537edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch wake_up(&nvmeq->sq_full); 538427e97080196548557b288517537ab7eb48c309fKeith Busch 539427e97080196548557b288517537ab7eb48c309fKeith Busch return 0; 540427e97080196548557b288517537ab7eb48c309fKeith Busch} 541427e97080196548557b288517537ab7eb48c309fKeith Busch 5421ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox/* NVMe scatterlists require no holes in the virtual address */ 5431ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox#define BIOVEC_NOT_VIRT_MERGEABLE(vec1, vec2) ((vec2)->bv_offset || \ 5441ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox (((vec1)->bv_offset + (vec1)->bv_len) % PAGE_SIZE)) 5451ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox 546427e97080196548557b288517537ab7eb48c309fKeith Buschstatic int nvme_map_bio(struct nvme_queue *nvmeq, struct nvme_iod *iod, 547b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio, enum dma_data_direction dma_dir, int psegs) 548b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 5497988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet struct bio_vec bvec, bvprv; 5507988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet struct bvec_iter iter; 551768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct scatterlist *sg = NULL; 5527988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet int length = 0, nsegs = 0, split_len = bio->bi_iter.bi_size; 5537988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet int first = 1; 554159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch 555159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (nvmeq->dev->stripe_size) 556159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch split_len = nvmeq->dev->stripe_size - 5574f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet ((bio->bi_iter.bi_sector << 9) & 5584f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet (nvmeq->dev->stripe_size - 1)); 559b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 560eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg_init_table(iod->sg, psegs); 5617988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet bio_for_each_segment(bvec, bio, iter) { 5627988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet if (!first && BIOVEC_PHYS_MERGEABLE(&bvprv, &bvec)) { 5637988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet sg->length += bvec.bv_len; 564768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } else { 5657988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet if (!first && BIOVEC_NOT_VIRT_MERGEABLE(&bvprv, &bvec)) 5667988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet return nvme_split_and_submit(bio, nvmeq, 56720d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet length); 568427e97080196548557b288517537ab7eb48c309fKeith Busch 569eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = sg ? sg + 1 : iod->sg; 5707988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet sg_set_page(sg, bvec.bv_page, 5717988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet bvec.bv_len, bvec.bv_offset); 572768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox nsegs++; 573768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } 574159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch 5757988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet if (split_len - length < bvec.bv_len) 57620d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet return nvme_split_and_submit(bio, nvmeq, split_len); 5777988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet length += bvec.bv_len; 578768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvprv = bvec; 5797988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet first = 0; 580b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 581eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->nents = nsegs; 582768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_mark_end(sg); 583427e97080196548557b288517537ab7eb48c309fKeith Busch if (dma_map_sg(nvmeq->q_dmadev, iod->sg, iod->nents, dma_dir) == 0) 5841ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return -ENOMEM; 585427e97080196548557b288517537ab7eb48c309fKeith Busch 5864f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet BUG_ON(length != bio->bi_iter.bi_size); 5871ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return length; 588b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 589b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5900e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic int nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, 5910e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct bio *bio, struct nvme_iod *iod, int cmdid) 5920e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 593edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct nvme_dsm_range *range = 594edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch (struct nvme_dsm_range *)iod_list(iod)[0]; 5950e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 5960e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5970e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->cattr = cpu_to_le32(0); 5984f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet range->nlb = cpu_to_le32(bio->bi_iter.bi_size >> ns->lba_shift); 5994f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet range->slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_iter.bi_sector)); 6000e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6010e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch memset(cmnd, 0, sizeof(*cmnd)); 6020e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.opcode = nvme_cmd_dsm; 6030e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.command_id = cmdid; 6040e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); 6050e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.prp1 = cpu_to_le64(iod->first_dma); 6060e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nr = 0; 6070e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); 6080e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6090e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (++nvmeq->sq_tail == nvmeq->q_depth) 6100e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvmeq->sq_tail = 0; 6110e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch writel(nvmeq->sq_tail, nvmeq->q_db); 6120e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6130e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return 0; 6140e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 6150e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 61600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcoxstatic int nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, 61700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid) 61800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 61900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 62000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 62100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 62200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.opcode = nvme_cmd_flush; 62300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.command_id = cmdid; 62400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.nsid = cpu_to_le32(ns->ns_id); 62500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 62600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 62700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox nvmeq->sq_tail = 0; 62800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 62900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 63000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return 0; 63100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 63200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 633edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschstatic int nvme_submit_iod(struct nvme_queue *nvmeq, struct nvme_iod *iod) 634b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 635edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct bio *bio = iod->private; 636edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data; 637ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox struct nvme_command *cmnd; 638edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch int cmdid; 639b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 control; 640b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 dsmgmt; 64100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 642ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox cmdid = alloc_cmdid(nvmeq, iod, bio_completion, NVME_IO_TIMEOUT); 643b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (unlikely(cmdid < 0)) 644edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch return cmdid; 645b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 646edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (bio->bi_rw & REQ_DISCARD) 647edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch return nvme_submit_discard(nvmeq, ns, bio, iod, cmdid); 64853562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch if (bio->bi_rw & REQ_FLUSH) 64900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 65000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 651b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control = 0; 652b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_FUA) 653b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_FUA; 654b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & (REQ_FAILFAST_DEV | REQ_RAHEAD)) 655b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_LR; 656b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt = 0; 658b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_RAHEAD) 659b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; 660b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 661ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 662b8deb62cf271fa9381edc8cf52bcae2f0225c55aMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 663b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 664edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch cmnd->rw.opcode = bio_data_dir(bio) ? nvme_cmd_write : nvme_cmd_read; 665ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.command_id = cmdid; 666ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.nsid = cpu_to_le32(ns->ns_id); 667edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch cmnd->rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); 668edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch cmnd->rw.prp2 = cpu_to_le64(iod->first_dma); 6694f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_iter.bi_sector)); 670edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch cmnd->rw.length = 671edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch cpu_to_le16((bio->bi_iter.bi_size >> ns->lba_shift) - 1); 672ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.control = cpu_to_le16(control); 673ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); 674b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 675b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 676b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = 0; 6777547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 678b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6791974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox return 0; 680edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch} 681edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch 68253562be74bd06bbe74d2acf3caca5398f8eeb160Keith Buschstatic int nvme_split_flush_data(struct nvme_queue *nvmeq, struct bio *bio) 68353562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch{ 68453562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch struct bio *split = bio_clone(bio, GFP_ATOMIC); 68553562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch if (!split) 68653562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch return -ENOMEM; 68753562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch 68853562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch split->bi_iter.bi_size = 0; 68953562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch split->bi_phys_segments = 0; 69053562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch bio->bi_rw &= ~REQ_FLUSH; 69153562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch bio_chain(split, bio); 69253562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch 69353562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch if (!waitqueue_active(&nvmeq->sq_full)) 69453562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 69553562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch bio_list_add(&nvmeq->sq_cong, split); 69653562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch bio_list_add(&nvmeq->sq_cong, bio); 69753562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch wake_up_process(nvme_thread); 69853562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch 69953562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch return 0; 70053562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch} 70153562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch 702edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch/* 703edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch * Called with local interrupts disabled and the q_lock held. May not sleep. 704edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch */ 705edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschstatic int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns, 706edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct bio *bio) 707edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch{ 708edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct nvme_iod *iod; 709edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch int psegs = bio_phys_segments(ns->queue, bio); 710edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch int result; 711edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch 71253562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch if ((bio->bi_rw & REQ_FLUSH) && psegs) 71353562be74bd06bbe74d2acf3caca5398f8eeb160Keith Busch return nvme_split_flush_data(nvmeq, bio); 714edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch 715edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch iod = nvme_alloc_iod(psegs, bio->bi_iter.bi_size, GFP_ATOMIC); 716edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!iod) 717edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch return -ENOMEM; 718edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch 719edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch iod->private = bio; 720edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (bio->bi_rw & REQ_DISCARD) { 721edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch void *range; 722edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch /* 723edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch * We reuse the small pool to allocate the 16-byte range here 724edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch * as it is not worth having a special pool for these or 725edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch * additional cases to handle freeing the iod. 726edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch */ 727edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch range = dma_pool_alloc(nvmeq->dev->prp_small_pool, 728edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch GFP_ATOMIC, 729edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch &iod->first_dma); 730edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!range) { 731edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch result = -ENOMEM; 732edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch goto free_iod; 733edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 734edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch iod_list(iod)[0] = (__le64 *)range; 735edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch iod->npages = 0; 736edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } else if (psegs) { 737edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch result = nvme_map_bio(nvmeq, iod, bio, 738edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch bio_data_dir(bio) ? DMA_TO_DEVICE : DMA_FROM_DEVICE, 739edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch psegs); 740edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (result <= 0) 741edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch goto free_iod; 742edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (nvme_setup_prps(nvmeq->dev, iod, result, GFP_ATOMIC) != 743edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch result) { 744edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch result = -ENOMEM; 745edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch goto free_iod; 746edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 747edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch nvme_start_io_acct(bio); 748edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 749edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (unlikely(nvme_submit_iod(nvmeq, iod))) { 750edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!waitqueue_active(&nvmeq->sq_full)) 751edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 752edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch list_add_tail(&iod->node, &nvmeq->iod_bio); 753edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 754edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch return 0; 7551974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox 756eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 757eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(nvmeq->dev, iod); 758eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox return result; 759b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 760b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 761e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcoxstatic int nvme_process_cq(struct nvme_queue *nvmeq) 762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 763821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 head, phase; 764b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 765b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = nvmeq->cq_head; 766821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = nvmeq->cq_phase; 767b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 768b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (;;) { 769c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 770c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 771b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion cqe = nvmeq->cqes[head]; 772821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != phase) 773b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox break; 774b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 775b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++head == nvmeq->q_depth) { 776b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = 0; 777821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = !phase; 778b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 779b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 780c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = free_cmdid(nvmeq, cqe.command_id, &fn); 781edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch fn(nvmeq, ctx, &cqe); 782b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 783b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 784b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* If the controller ignores the cq head doorbell and continuously 785b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * writes to the queue, it is theoretically possible to wrap around 786b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the queue twice and mistakenly return IRQ_NONE. Linux only 787b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * requires that 0.1% of your interrupts are handled, so this isn't 788b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * a big problem. 789b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 790821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 791e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox return 0; 792b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 793b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu writel(head, nvmeq->q_db + nvmeq->dev->db_stride); 794b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = head; 795821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = phase; 796b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 797e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvmeq->cqe_seen = 1; 798e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox return 1; 799b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 800b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8017d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcoxstatic void nvme_make_request(struct request_queue *q, struct bio *bio) 8027d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox{ 8037d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox struct nvme_ns *ns = q->queuedata; 8047d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(ns->dev); 8057d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox int result = -EBUSY; 8067d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 807cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch if (!nvmeq) { 808cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch put_nvmeq(NULL); 809cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch bio_endio(bio, -EIO); 810cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return; 811cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch } 812cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 8137d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 814224042742582c9938788b81165180c876e997a07Keith Busch if (!nvmeq->q_suspended && bio_list_empty(&nvmeq->sq_cong)) 8157d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox result = nvme_submit_bio_queue(nvmeq, ns, bio); 8167d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox if (unlikely(result)) { 817edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!waitqueue_active(&nvmeq->sq_full)) 8187d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 8197d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 8207d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox } 8217d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 8227d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox nvme_process_cq(nvmeq); 8237d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 8247d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox put_nvmeq(nvmeq); 8257d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox} 8267d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 827b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_irq(int irq, void *data) 828b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 82958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox irqreturn_t result; 83058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 83158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_lock(&nvmeq->q_lock); 832e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvme_process_cq(nvmeq); 833e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; 834e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvmeq->cqe_seen = 0; 83558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_unlock(&nvmeq->q_lock); 83658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return result; 83758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 83858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 83958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic irqreturn_t nvme_irq_check(int irq, void *data) 84058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox{ 84158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 84258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 84358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 84458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_NONE; 84558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_WAKE_THREAD; 84658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 84758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 8483c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic void nvme_abort_command(struct nvme_queue *nvmeq, int cmdid) 8493c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 8503c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 851c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cancel_cmdid(nvmeq, cmdid, NULL); 8523c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 8533c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 8543c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 855c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstruct sync_cmd_info { 856c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct task_struct *task; 857c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox u32 result; 858c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox int status; 859c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox}; 860c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 861edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschstatic void sync_completion(struct nvme_queue *nvmeq, void *ctx, 862c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 863c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 864c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct sync_cmd_info *cmdinfo = ctx; 865c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->result = le32_to_cpup(&cqe->result); 866c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 867c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox wake_up_process(cmdinfo->task); 868c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 869c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 870b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 871b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Returns 0 on success. If the result is negative, it's a Linux error code; 872b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * if the result is positive, it's an NVM Express status code 873b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 8744f5099af4f3d5f999d8ab7784472d93e810e3912Keith Buschstatic int nvme_submit_sync_cmd(struct nvme_dev *dev, int q_idx, 8754f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch struct nvme_command *cmd, 8765d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma u32 *result, unsigned timeout) 877b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 8784f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch int cmdid, ret; 879b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct sync_cmd_info cmdinfo; 8804f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch struct nvme_queue *nvmeq; 8814f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch 8824f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch nvmeq = lock_nvmeq(dev, q_idx); 8834f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch if (!nvmeq) { 8844f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch unlock_nvmeq(nvmeq); 8854f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch return -ENODEV; 8864f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch } 887b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 888b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.task = current; 889b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.status = -EINTR; 890b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8914f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch cmdid = alloc_cmdid(nvmeq, &cmdinfo, sync_completion, timeout); 8924f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch if (cmdid < 0) { 8934f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch unlock_nvmeq(nvmeq); 894b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 8954f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch } 896b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmd->common.command_id = cmdid; 897b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8983c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox set_current_state(TASK_KILLABLE); 8994f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch ret = nvme_submit_cmd(nvmeq, cmd); 9004f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch if (ret) { 9014f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch free_cmdid(nvmeq, cmdid, NULL); 9024f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch unlock_nvmeq(nvmeq); 9034f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch set_current_state(TASK_RUNNING); 9044f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch return ret; 9054f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch } 9064f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch unlock_nvmeq(nvmeq); 90778f8d2577bd79ce9d62f4d9e6d3b895bd1dd1d1dKeith Busch schedule_timeout(timeout); 908b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9093c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox if (cmdinfo.status == -EINTR) { 9104f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch nvmeq = lock_nvmeq(dev, q_idx); 9114f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch if (nvmeq) 9124f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch nvme_abort_command(nvmeq, cmdid); 9134f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch unlock_nvmeq(nvmeq); 9143c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox return -EINTR; 9153c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox } 9163c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 917b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 918b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox *result = cmdinfo.result; 919b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 920b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdinfo.status; 921b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 922b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9234d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_submit_async_cmd(struct nvme_queue *nvmeq, 9244d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_command *cmd, 9254d115420707afcabe77d2535e092356df6664b70Keith Busch struct async_cmd_info *cmdinfo, unsigned timeout) 9264d115420707afcabe77d2535e092356df6664b70Keith Busch{ 9274d115420707afcabe77d2535e092356df6664b70Keith Busch int cmdid; 9284d115420707afcabe77d2535e092356df6664b70Keith Busch 9294d115420707afcabe77d2535e092356df6664b70Keith Busch cmdid = alloc_cmdid_killable(nvmeq, cmdinfo, async_completion, timeout); 9304d115420707afcabe77d2535e092356df6664b70Keith Busch if (cmdid < 0) 9314d115420707afcabe77d2535e092356df6664b70Keith Busch return cmdid; 9324d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo->status = -EINTR; 9334d115420707afcabe77d2535e092356df6664b70Keith Busch cmd->common.command_id = cmdid; 9344f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch return nvme_submit_cmd(nvmeq, cmd); 9354d115420707afcabe77d2535e092356df6664b70Keith Busch} 9364d115420707afcabe77d2535e092356df6664b70Keith Busch 9375d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, 938b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 *result) 939b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 9404f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch return nvme_submit_sync_cmd(dev, 0, cmd, result, ADMIN_TIMEOUT); 9414f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch} 9424f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch 9434f5099af4f3d5f999d8ab7784472d93e810e3912Keith Buschint nvme_submit_io_cmd(struct nvme_dev *dev, struct nvme_command *cmd, 9444f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch u32 *result) 9454f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch{ 9464f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch return nvme_submit_sync_cmd(dev, smp_processor_id() + 1, cmd, result, 9474f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch NVME_IO_TIMEOUT); 948b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 949b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9504d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_submit_admin_cmd_async(struct nvme_dev *dev, 9514d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_command *cmd, struct async_cmd_info *cmdinfo) 9524d115420707afcabe77d2535e092356df6664b70Keith Busch{ 9535a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch return nvme_submit_async_cmd(raw_nvmeq(dev, 0), cmd, cmdinfo, 9544d115420707afcabe77d2535e092356df6664b70Keith Busch ADMIN_TIMEOUT); 9554d115420707afcabe77d2535e092356df6664b70Keith Busch} 9564d115420707afcabe77d2535e092356df6664b70Keith Busch 957b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 958b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 959b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 960b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 961b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 962b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 963b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.opcode = opcode; 964b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.qid = cpu_to_le16(id); 965b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 966b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 967b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 968b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 969b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 970b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 971b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 972b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 973b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 974b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 975b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 976b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 977b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 978b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 979b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 980b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.opcode = nvme_admin_create_cq; 981b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 982b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cqid = cpu_to_le16(qid); 983b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 984b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cq_flags = cpu_to_le16(flags); 985b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 986b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 987b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 988b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 989b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 990b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 991b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 992b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 993b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 994b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 995b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 996b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 997b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 998b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 999b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1000b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 1001b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.opcode = nvme_admin_create_sq; 1002b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 1003b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sqid = cpu_to_le16(qid); 1004b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 1005b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sq_flags = cpu_to_le16(flags); 1006b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.cqid = cpu_to_le16(qid); 1007b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1008b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 1009b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 1010b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 1011b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1012b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1013b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1014b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 1015b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1016b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 1017b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1018b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1019b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 1020b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1021b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 1022b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1023b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10245d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns, 1025bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox dma_addr_t dma_addr) 1026bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 1027bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 1028bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 1029bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 1030bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.opcode = nvme_admin_identify; 1031bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.nsid = cpu_to_le32(nsid); 1032bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.prp1 = cpu_to_le64(dma_addr); 1033bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.cns = cpu_to_le32(cns); 1034bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 1035bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, NULL); 1036bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 1037bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 10385d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid, 103908df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr_t dma_addr, u32 *result) 1040bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 1041bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 1042bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 1043bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 1044bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.opcode = nvme_admin_get_features; 1045a42ceccef0c43b46ff6bc1b12a7c1076ef243df1Keith Busch c.features.nsid = cpu_to_le32(nsid); 1046bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 1047bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.fid = cpu_to_le32(fid); 1048bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 104908df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch return nvme_submit_admin_cmd(dev, &c, result); 1050df3481399042200792822b6243e36a95a557b57eMatthew Wilcox} 1051df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 10525d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11, 10535d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma dma_addr_t dma_addr, u32 *result) 1054df3481399042200792822b6243e36a95a557b57eMatthew Wilcox{ 1055df3481399042200792822b6243e36a95a557b57eMatthew Wilcox struct nvme_command c; 1056df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 1057df3481399042200792822b6243e36a95a557b57eMatthew Wilcox memset(&c, 0, sizeof(c)); 1058df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.opcode = nvme_admin_set_features; 1059df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 1060df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.fid = cpu_to_le32(fid); 1061df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.dword11 = cpu_to_le32(dword11); 1062df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 1063bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, result); 1064bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 1065bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 1066a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox/** 1067c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * nvme_abort_cmd - Attempt aborting a command 1068c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * @cmdid: Command id of a timed out IO 1069c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * @queue: The queue with timed out IO 1070c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * 1071c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * Schedule controller reset if the command was already aborted once before and 1072c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * still hasn't been returned to the driver, or if this is the admin queue. 1073c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch */ 1074c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Buschstatic void nvme_abort_cmd(int cmdid, struct nvme_queue *nvmeq) 1075c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch{ 1076c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch int a_cmdid; 1077c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch struct nvme_command cmd; 1078c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch struct nvme_dev *dev = nvmeq->dev; 1079c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 10805a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *adminq; 1081c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1082c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (!nvmeq->qid || info[cmdid].aborted) { 1083c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (work_busy(&dev->reset_work)) 1084c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1085c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch list_del_init(&dev->node); 1086c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev_warn(&dev->pci_dev->dev, 1087c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch "I/O %d QID %d timeout, reset controller\n", cmdid, 1088c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid); 10899ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo dev->reset_workfn = nvme_reset_failed_dev; 1090c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch queue_work(nvme_workq, &dev->reset_work); 1091c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1092c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch } 1093c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1094c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (!dev->abort_limit) 1095c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1096c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 10975a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch adminq = rcu_dereference(dev->queues[0]); 10985a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch a_cmdid = alloc_cmdid(adminq, CMD_CTX_ABORT, special_completion, 1099c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch ADMIN_TIMEOUT); 1100c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (a_cmdid < 0) 1101c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1102c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1103c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch memset(&cmd, 0, sizeof(cmd)); 1104c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.opcode = nvme_admin_abort_cmd; 1105c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.cid = cmdid; 1106c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.sqid = cpu_to_le16(nvmeq->qid); 1107c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.command_id = a_cmdid; 1108c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1109c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch --dev->abort_limit; 1110c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch info[cmdid].aborted = 1; 1111c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch info[cmdid].timeout = jiffies + ADMIN_TIMEOUT; 1112c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1113c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev_warn(nvmeq->q_dmadev, "Aborting I/O %d QID %d\n", cmdid, 1114c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid); 11155a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch nvme_submit_cmd(adminq, &cmd); 1116c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch} 1117c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1118c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch/** 1119a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * nvme_cancel_ios - Cancel outstanding I/Os 1120a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @queue: The queue to cancel I/Os on 1121a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @timeout: True to only cancel I/Os which have timed out 1122a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox */ 1123a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcoxstatic void nvme_cancel_ios(struct nvme_queue *nvmeq, bool timeout) 1124a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox{ 1125a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int depth = nvmeq->q_depth - 1; 1126a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 1127a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox unsigned long now = jiffies; 1128a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int cmdid; 1129a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1130a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox for_each_set_bit(cmdid, nvmeq->cmdid_data, depth) { 1131a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox void *ctx; 1132a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_completion_fn fn; 1133a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox static struct nvme_completion cqe = { 1134af2d9ca744af5e03390eeb3864d08ce75c860899Matthew Wilcox .status = cpu_to_le16(NVME_SC_ABORT_REQ << 1), 1135a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox }; 1136a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1137a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox if (timeout && !time_after(now, info[cmdid].timeout)) 1138a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox continue; 1139053ab702cc2702f25a97ead087ed344b864785b7Keith Busch if (info[cmdid].ctx == CMD_CTX_CANCELLED) 1140053ab702cc2702f25a97ead087ed344b864785b7Keith Busch continue; 1141c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (timeout && nvmeq->dev->initialized) { 1142c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvme_abort_cmd(cmdid, nvmeq); 1143c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch continue; 1144c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch } 1145c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d QID %d\n", cmdid, 1146c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid); 1147a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox ctx = cancel_cmdid(nvmeq, cmdid, &fn); 1148edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch fn(nvmeq, ctx, &cqe); 1149a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox } 1150a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox} 1151a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 11525a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Buschstatic void nvme_free_queue(struct rcu_head *r) 11539e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox{ 11545a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *nvmeq = container_of(r, struct nvme_queue, r_head); 11555a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch 1156224042742582c9938788b81165180c876e997a07Keith Busch spin_lock_irq(&nvmeq->q_lock); 1157224042742582c9938788b81165180c876e997a07Keith Busch while (bio_list_peek(&nvmeq->sq_cong)) { 1158224042742582c9938788b81165180c876e997a07Keith Busch struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 1159224042742582c9938788b81165180c876e997a07Keith Busch bio_endio(bio, -EIO); 1160224042742582c9938788b81165180c876e997a07Keith Busch } 1161edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch while (!list_empty(&nvmeq->iod_bio)) { 1162edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch static struct nvme_completion cqe = { 1163edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch .status = cpu_to_le16( 1164edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch (NVME_SC_ABORT_REQ | NVME_SC_DNR) << 1), 1165edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch }; 1166edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct nvme_iod *iod = list_first_entry(&nvmeq->iod_bio, 1167edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct nvme_iod, 1168edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch node); 1169edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch list_del(&iod->node); 1170edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch bio_completion(nvmeq, iod, &cqe); 1171edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 1172224042742582c9938788b81165180c876e997a07Keith Busch spin_unlock_irq(&nvmeq->q_lock); 1173224042742582c9938788b81165180c876e997a07Keith Busch 11749e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 11759e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 11769e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 11779e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 117842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (nvmeq->qid) 117942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch free_cpumask_var(nvmeq->cpu_mask); 11809e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox kfree(nvmeq); 11819e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox} 11829e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 1183a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Buschstatic void nvme_free_queues(struct nvme_dev *dev, int lowest) 1184224042742582c9938788b81165180c876e997a07Keith Busch{ 1185224042742582c9938788b81165180c876e997a07Keith Busch int i; 1186224042742582c9938788b81165180c876e997a07Keith Busch 1187a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch for (i = dev->queue_count - 1; i >= lowest; i--) { 11885a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *nvmeq = raw_nvmeq(dev, i); 11895a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_assign_pointer(dev->queues[i], NULL); 11905a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch call_rcu(&nvmeq->r_head, nvme_free_queue); 1191224042742582c9938788b81165180c876e997a07Keith Busch dev->queue_count--; 1192224042742582c9938788b81165180c876e997a07Keith Busch } 1193224042742582c9938788b81165180c876e997a07Keith Busch} 1194224042742582c9938788b81165180c876e997a07Keith Busch 11954d115420707afcabe77d2535e092356df6664b70Keith Busch/** 11964d115420707afcabe77d2535e092356df6664b70Keith Busch * nvme_suspend_queue - put queue into suspended state 11974d115420707afcabe77d2535e092356df6664b70Keith Busch * @nvmeq - queue to suspend 11984d115420707afcabe77d2535e092356df6664b70Keith Busch * 11994d115420707afcabe77d2535e092356df6664b70Keith Busch * Returns 1 if already suspended, 0 otherwise. 12004d115420707afcabe77d2535e092356df6664b70Keith Busch */ 12014d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_suspend_queue(struct nvme_queue *nvmeq) 1202b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 12034d115420707afcabe77d2535e092356df6664b70Keith Busch int vector = nvmeq->dev->entry[nvmeq->cq_vector].vector; 1204b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1205a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1206224042742582c9938788b81165180c876e997a07Keith Busch if (nvmeq->q_suspended) { 1207224042742582c9938788b81165180c876e997a07Keith Busch spin_unlock_irq(&nvmeq->q_lock); 12084d115420707afcabe77d2535e092356df6664b70Keith Busch return 1; 12093295874b6074d749516d6decd43afad7bf6e38ffKeith Busch } 1210224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->q_suspended = 1; 121142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq->dev->online_queues--; 1212a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1213a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1214aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox irq_set_affinity_hint(vector, NULL); 1215aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox free_irq(vector, nvmeq); 1216b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12174d115420707afcabe77d2535e092356df6664b70Keith Busch return 0; 12184d115420707afcabe77d2535e092356df6664b70Keith Busch} 1219b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12204d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_clear_queue(struct nvme_queue *nvmeq) 12214d115420707afcabe77d2535e092356df6664b70Keith Busch{ 1222224042742582c9938788b81165180c876e997a07Keith Busch spin_lock_irq(&nvmeq->q_lock); 1223224042742582c9938788b81165180c876e997a07Keith Busch nvme_process_cq(nvmeq); 1224224042742582c9938788b81165180c876e997a07Keith Busch nvme_cancel_ios(nvmeq, false); 1225224042742582c9938788b81165180c876e997a07Keith Busch spin_unlock_irq(&nvmeq->q_lock); 1226b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1227b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12284d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_disable_queue(struct nvme_dev *dev, int qid) 12294d115420707afcabe77d2535e092356df6664b70Keith Busch{ 12305a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *nvmeq = raw_nvmeq(dev, qid); 12314d115420707afcabe77d2535e092356df6664b70Keith Busch 12324d115420707afcabe77d2535e092356df6664b70Keith Busch if (!nvmeq) 12334d115420707afcabe77d2535e092356df6664b70Keith Busch return; 12344d115420707afcabe77d2535e092356df6664b70Keith Busch if (nvme_suspend_queue(nvmeq)) 12354d115420707afcabe77d2535e092356df6664b70Keith Busch return; 12364d115420707afcabe77d2535e092356df6664b70Keith Busch 12370e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch /* Don't tell the adapter to delete the admin queue. 12380e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch * Don't tell a removed adapter to delete IO queues. */ 12390e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch if (qid && readl(&dev->bar->csts) != -1) { 1240b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1241b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1242b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 12434d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_clear_queue(nvmeq); 1244b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1245b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1246b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 1247b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int depth, int vector) 1248b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1249b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1250224042742582c9938788b81165180c876e997a07Keith Busch unsigned extra = nvme_queue_extra(depth); 1251b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq) + extra, GFP_KERNEL); 1252b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq) 1253b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1254b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1255b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cqes = dma_alloc_coherent(dmadev, CQ_SIZE(depth), 1256b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->cq_dma_addr, GFP_KERNEL); 1257b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->cqes) 1258b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 1259b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset((void *)nvmeq->cqes, 0, CQ_SIZE(depth)); 1260b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1261b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds = dma_alloc_coherent(dmadev, SQ_SIZE(depth), 1262b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->sq_dma_addr, GFP_KERNEL); 1263b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->sq_cmds) 1264b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_cqdma; 1265b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 126642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (qid && !zalloc_cpumask_var(&nvmeq->cpu_mask, GFP_KERNEL)) 126742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch goto free_sqdma; 126842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 1269b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_dmadev = dmadev; 1270091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvmeq->dev = dev; 12713193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox snprintf(nvmeq->irqname, sizeof(nvmeq->irqname), "nvme%dq%d", 12723193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox dev->instance, qid); 1273b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_init(&nvmeq->q_lock); 1274b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = 0; 1275821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = 1; 1276b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox init_waitqueue_head(&nvmeq->sq_full); 12771fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox init_waitqueue_entry(&nvmeq->sq_cong_wait, nvme_thread); 1278b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_init(&nvmeq->sq_cong); 1279edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch INIT_LIST_HEAD(&nvmeq->iod_bio); 1280b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 1281b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_depth = depth; 1282b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_vector = vector; 1283c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid = qid; 1284224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->q_suspended = 1; 1285224042742582c9938788b81165180c876e997a07Keith Busch dev->queue_count++; 12865a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_assign_pointer(dev->queues[qid], nvmeq); 1287b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1288b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 1289b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 129042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch free_sqdma: 129142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dma_free_coherent(dmadev, SQ_SIZE(depth), (void *)nvmeq->sq_cmds, 129242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq->sq_dma_addr); 1293b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_cqdma: 129468b8eca5f882230e4991df0db0a3094f49420a90Keith Busch dma_free_coherent(dmadev, CQ_SIZE(depth), (void *)nvmeq->cqes, 1295b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_dma_addr); 1296b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 1297b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 1298b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1299b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1300b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 13013001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcoxstatic int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 13023001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox const char *name) 13033001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox{ 130458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if (use_threaded_interrupts) 130558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 1306481e5bad84239b01415b888df2040c1860ae3cfdMichael Opdenacker nvme_irq_check, nvme_irq, IRQF_SHARED, 130758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox name, nvmeq); 13083001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 1309481e5bad84239b01415b888df2040c1860ae3cfdMichael Opdenacker IRQF_SHARED, name, nvmeq); 13103001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox} 13113001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox 1312224042742582c9938788b81165180c876e997a07Keith Buschstatic void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) 1313b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1314224042742582c9938788b81165180c876e997a07Keith Busch struct nvme_dev *dev = nvmeq->dev; 1315224042742582c9938788b81165180c876e997a07Keith Busch unsigned extra = nvme_queue_extra(nvmeq->q_depth); 1316b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1317224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->sq_tail = 0; 1318224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->cq_head = 0; 1319224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->cq_phase = 1; 1320b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 1321224042742582c9938788b81165180c876e997a07Keith Busch memset(nvmeq->cmdid_data, 0, extra); 1322224042742582c9938788b81165180c876e997a07Keith Busch memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); 1323224042742582c9938788b81165180c876e997a07Keith Busch nvme_cancel_ios(nvmeq, false); 1324224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->q_suspended = 0; 132542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dev->online_queues++; 1326224042742582c9938788b81165180c876e997a07Keith Busch} 1327224042742582c9938788b81165180c876e997a07Keith Busch 1328224042742582c9938788b81165180c876e997a07Keith Buschstatic int nvme_create_queue(struct nvme_queue *nvmeq, int qid) 1329224042742582c9938788b81165180c876e997a07Keith Busch{ 1330224042742582c9938788b81165180c876e997a07Keith Busch struct nvme_dev *dev = nvmeq->dev; 1331224042742582c9938788b81165180c876e997a07Keith Busch int result; 13323f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox 1333b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_cq(dev, qid, nvmeq); 1334b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1335224042742582c9938788b81165180c876e997a07Keith Busch return result; 1336b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1337b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_sq(dev, qid, nvmeq); 1338b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1339b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_cq; 1340b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 13413193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox result = queue_request_irq(dev, nvmeq, nvmeq->irqname); 1342b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1343b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_sq; 1344b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 13450a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1346224042742582c9938788b81165180c876e997a07Keith Busch nvme_init_queue(nvmeq, qid); 13470a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1348224042742582c9938788b81165180c876e997a07Keith Busch 1349224042742582c9938788b81165180c876e997a07Keith Busch return result; 1350b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1351b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_sq: 1352b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1353b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_cq: 1354b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1355224042742582c9938788b81165180c876e997a07Keith Busch return result; 1356b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1357b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1358ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_wait_ready(struct nvme_dev *dev, u64 cap, bool enabled) 1359ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 1360ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox unsigned long timeout; 1361ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox u32 bit = enabled ? NVME_CSTS_RDY : 0; 1362ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1363ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; 1364ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1365ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox while ((readl(&dev->bar->csts) & NVME_CSTS_RDY) != bit) { 1366ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox msleep(100); 1367ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (fatal_signal_pending(current)) 1368ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return -EINTR; 1369ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (time_after(jiffies, timeout)) { 1370ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox dev_err(&dev->pci_dev->dev, 137127e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox "Device not ready; aborting %s\n", enabled ? 137227e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox "initialisation" : "reset"); 1373ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return -ENODEV; 1374ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox } 1375ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox } 1376ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1377ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return 0; 1378ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1379ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1380ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox/* 1381ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * If the device has been passed off to us in an enabled state, just clear 1382ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * the enabled bit. The spec says we should set the 'shutdown notification 1383ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * bits', but doing so may cause the device to complete commands to the 1384ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * admin queue ... and we don't know what memory that might be pointing at! 1385ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox */ 1386ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_disable_ctrl(struct nvme_dev *dev, u64 cap) 1387ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 138844af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox u32 cc = readl(&dev->bar->cc); 138944af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox 139044af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox if (cc & NVME_CC_ENABLE) 139144af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox writel(cc & ~NVME_CC_ENABLE, &dev->bar->cc); 1392ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return nvme_wait_ready(dev, cap, false); 1393ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1394ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1395ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap) 1396ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 1397ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return nvme_wait_ready(dev, cap, true); 1398ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1399ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 14001894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Buschstatic int nvme_shutdown_ctrl(struct nvme_dev *dev) 14011894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch{ 14021894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch unsigned long timeout; 14031894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch u32 cc; 14041894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 14051894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch cc = (readl(&dev->bar->cc) & ~NVME_CC_SHN_MASK) | NVME_CC_SHN_NORMAL; 14061894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch writel(cc, &dev->bar->cc); 14071894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 14081894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch timeout = 2 * HZ + jiffies; 14091894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch while ((readl(&dev->bar->csts) & NVME_CSTS_SHST_MASK) != 14101894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch NVME_CSTS_SHST_CMPLT) { 14111894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch msleep(100); 14121894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch if (fatal_signal_pending(current)) 14131894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch return -EINTR; 14141894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch if (time_after(jiffies, timeout)) { 14151894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch dev_err(&dev->pci_dev->dev, 14161894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch "Device shutdown incomplete; abort shutdown\n"); 14171894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch return -ENODEV; 14181894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch } 14191894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch } 14201894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 14211894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch return 0; 14221894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch} 14231894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 14248d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_configure_admin_queue(struct nvme_dev *dev) 1425b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1426ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox int result; 1427b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 aqa; 1428ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox u64 cap = readq(&dev->bar->cap); 1429b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq; 1430b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1431ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox result = nvme_disable_ctrl(dev, cap); 1432ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (result < 0) 1433ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return result; 1434b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14355a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch nvmeq = raw_nvmeq(dev, 0); 1436cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch if (!nvmeq) { 1437cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvmeq = nvme_alloc_queue(dev, 0, 64, 0); 1438cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch if (!nvmeq) 1439cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return -ENOMEM; 1440cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch } 1441b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1442b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa = nvmeq->q_depth - 1; 1443b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa |= aqa << 16; 1444b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1445b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config = NVME_CC_ENABLE | NVME_CC_CSS_NVM; 1446b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= (PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; 1447b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; 14487f53f9d2424533256ae86f7df5661a17de743de8Matthew Wilcox dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; 1449b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1450b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(aqa, &dev->bar->aqa); 1451b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->sq_dma_addr, &dev->bar->asq); 1452b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->cq_dma_addr, &dev->bar->acq); 1453b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(dev->ctrl_config, &dev->bar->cc); 1454b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1455ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox result = nvme_enable_ctrl(dev, cap); 1456025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1457cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return result; 14589e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 14593193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox result = queue_request_irq(dev, nvmeq, nvmeq->irqname); 1460025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1461cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return result; 1462025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch 14630a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1464224042742582c9938788b81165180c876e997a07Keith Busch nvme_init_queue(nvmeq, 0); 14650a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1466b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1467b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1468b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14695d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermastruct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, 1470eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned long addr, unsigned length) 1471b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 147236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox int i, err, count, nents, offset; 14737fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct scatterlist *sg; 14747fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct page **pages; 1475eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 147636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 147736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (addr & 3) 1478eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 14795460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter if (!length || length > INT_MAX - PAGE_SIZE) 1480eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 14817fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 148236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox offset = offset_in_page(addr); 14837fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox count = DIV_ROUND_UP(offset + length, PAGE_SIZE); 14847fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox pages = kcalloc(count, sizeof(*pages), GFP_KERNEL); 148522fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter if (!pages) 148622fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter return ERR_PTR(-ENOMEM); 148736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 148836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = get_user_pages_fast(addr, count, 1, pages); 148936c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (err < count) { 149036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox count = err; 149136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = -EFAULT; 149236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox goto put_pages; 149336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox } 14947fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 14956808c5fb7fc1574c7608a38c9819f1639d89c3d0Santosh Y err = -ENOMEM; 1496eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(count, length, GFP_KERNEL); 14976808c5fb7fc1574c7608a38c9819f1639d89c3d0Santosh Y if (!iod) 14986808c5fb7fc1574c7608a38c9819f1639d89c3d0Santosh Y goto put_pages; 14996808c5fb7fc1574c7608a38c9819f1639d89c3d0Santosh Y 1500eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = iod->sg; 150136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox sg_init_table(sg, count); 1502d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox for (i = 0; i < count; i++) { 1503d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox sg_set_page(&sg[i], pages[i], 15045460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter min_t(unsigned, length, PAGE_SIZE - offset), 15055460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter offset); 1506d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox length -= (PAGE_SIZE - offset); 1507d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox offset = 0; 15087fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox } 1509fe304c43c6d63e29ed4fc46a874d7a74313788c5Matthew Wilcox sg_mark_end(&sg[i - 1]); 15101c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox iod->nents = count; 15117fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 15127fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox nents = dma_map_sg(&dev->pci_dev->dev, sg, count, 15137fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 151436c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (!nents) 1515eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 1516b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15177fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1518eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 1519b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1520eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 1521eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 15227fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_pages: 15237fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox for (i = 0; i < count; i++) 15247fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_page(pages[i]); 15257fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1526eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(err); 15277fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1528b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15295d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_unmap_user_pages(struct nvme_dev *dev, int write, 15301c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox struct nvme_iod *iod) 15317fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox{ 15321c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox int i; 1533b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15341c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 15351c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 15367fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 15371c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox for (i = 0; i < iod->nents; i++) 15381c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox put_page(sg_page(&iod->sg[i])); 15397fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1540b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1541a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcoxstatic int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) 1542a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox{ 1543a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_dev *dev = ns->dev; 1544a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_user_io io; 1545a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_command c; 1546f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch unsigned length, meta_len; 1547f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int status, i; 1548f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch struct nvme_iod *iod, *meta_iod = NULL; 1549f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch dma_addr_t meta_dma_addr; 1550f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch void *meta, *uninitialized_var(meta_mem); 1551a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1552a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox if (copy_from_user(&io, uio, sizeof(io))) 1553a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return -EFAULT; 15546c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox length = (io.nblocks + 1) << ns->lba_shift; 1555f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_len = (io.nblocks + 1) * ns->ms; 1556f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1557f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len && ((io.metadata & 3) || !io.metadata)) 1558f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch return -EINVAL; 15596c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 15606c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox switch (io.opcode) { 15616c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_write: 15626c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_read: 15636bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case nvme_cmd_compare: 1564eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_map_user_pages(dev, io.opcode & 1, io.addr, length); 15656413214c5d424fd5aae6567848340f962ad2ce0fMatthew Wilcox break; 15666c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox default: 15676bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EINVAL; 15686c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox } 15696c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 1570eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1571eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1572a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1573a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox memset(&c, 0, sizeof(c)); 1574a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.opcode = io.opcode; 1575a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.flags = io.flags; 15766c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.nsid = cpu_to_le32(ns->ns_id); 1577a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.slba = cpu_to_le64(io.slba); 15786c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.length = cpu_to_le16(io.nblocks); 1579a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.control = cpu_to_le16(io.control); 15801c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); 15811c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.reftag = cpu_to_le32(io.reftag); 15821c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.apptag = cpu_to_le16(io.apptag); 15831c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.appmask = cpu_to_le16(io.appmask); 1584f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1585f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len) { 15861b56749e541ad59068582f2a28297843e243b856Keith Busch meta_iod = nvme_map_user_pages(dev, io.opcode & 1, io.metadata, 15871b56749e541ad59068582f2a28297843e243b856Keith Busch meta_len); 1588f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (IS_ERR(meta_iod)) { 1589f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch status = PTR_ERR(meta_iod); 1590f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod = NULL; 1591f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch goto unmap; 1592f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1593f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1594f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_mem = dma_alloc_coherent(&dev->pci_dev->dev, meta_len, 1595f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch &meta_dma_addr, GFP_KERNEL); 1596f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (!meta_mem) { 1597f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch status = -ENOMEM; 1598f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch goto unmap; 1599f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1600f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1601f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (io.opcode & 1) { 1602f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int meta_offset = 0; 1603f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1604f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch for (i = 0; i < meta_iod->nents; i++) { 1605f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + 1606f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].offset; 1607f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch memcpy(meta_mem + meta_offset, meta, 1608f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].length); 1609f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch kunmap_atomic(meta); 1610f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_offset += meta_iod->sg[i].length; 1611f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1612f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1613f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1614f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch c.rw.metadata = cpu_to_le64(meta_dma_addr); 1615f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1616f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1617edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch length = nvme_setup_prps(dev, iod, length, GFP_KERNEL); 1618edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch c.rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); 1619edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch c.rw.prp2 = cpu_to_le64(iod->first_dma); 1620a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1621b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (length != (io.nblocks + 1) << ns->lba_shift) 1622b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1623b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 16244f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch status = nvme_submit_io_cmd(dev, &c, NULL); 1625a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1626f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len) { 1627f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (status == NVME_SC_SUCCESS && !(io.opcode & 1)) { 1628f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int meta_offset = 0; 1629f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1630f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch for (i = 0; i < meta_iod->nents; i++) { 1631f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + 1632f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].offset; 1633f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch memcpy(meta, meta_mem + meta_offset, 1634f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].length); 1635f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch kunmap_atomic(meta); 1636f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_offset += meta_iod->sg[i].length; 1637f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1638f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1639f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1640f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch dma_free_coherent(&dev->pci_dev->dev, meta_len, meta_mem, 1641f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_dma_addr); 1642f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1643f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1644f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch unmap: 16451c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, io.opcode & 1, iod); 1646eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 1647f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1648f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_iod) { 1649f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch nvme_unmap_user_pages(dev, io.opcode & 1, meta_iod); 1650f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch nvme_free_iod(dev, meta_iod); 1651f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1652f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1653a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return status; 1654a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox} 1655a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 165650af8baec46a99a9b81a4600c0374f83a5a590a9Keith Buschstatic int nvme_user_admin_cmd(struct nvme_dev *dev, 16576bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd __user *ucmd) 16586ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox{ 16596bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd cmd; 16606ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox struct nvme_command c; 1661eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status, length; 1662c7d36ab8fa04c213328119a9c0d66985fe204ee5Keith Busch struct nvme_iod *uninitialized_var(iod); 166394f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch unsigned timeout; 16646ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 16656bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (!capable(CAP_SYS_ADMIN)) 16666bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EACCES; 16676bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (copy_from_user(&cmd, ucmd, sizeof(cmd))) 16686ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return -EFAULT; 16696ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 16706ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox memset(&c, 0, sizeof(c)); 16716bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.opcode = cmd.opcode; 16726bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.flags = cmd.flags; 16736bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.nsid = cpu_to_le32(cmd.nsid); 16746bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); 16756bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); 16766bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); 16776bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); 16786bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); 16796bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); 16806bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); 16816bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); 16826bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 16836bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox length = cmd.data_len; 16846bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 1685497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox iod = nvme_map_user_pages(dev, cmd.opcode & 1, cmd.addr, 1686497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox length); 1687eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1688eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1689edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch length = nvme_setup_prps(dev, iod, length, GFP_KERNEL); 1690edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch c.common.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); 1691edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch c.common.prp2 = cpu_to_le64(iod->first_dma); 16926bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 16936bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 169494f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch timeout = cmd.timeout_ms ? msecs_to_jiffies(cmd.timeout_ms) : 169594f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch ADMIN_TIMEOUT; 16966bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (length != cmd.data_len) 1697b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1698b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 16994f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch status = nvme_submit_sync_cmd(dev, 0, &c, &cmd.result, timeout); 1700eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 17016bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 17021c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, cmd.opcode & 1, iod); 1703eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 17046bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 1705f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 1706cf90bc4830b858487fe4b9b9ecd0031e23ca3e83Chayan Biswas if ((status >= 0) && copy_to_user(&ucmd->result, &cmd.result, 1707f4f117f64baf8840d22266d518227b2a186d294bKeith Busch sizeof(cmd.result))) 1708f4f117f64baf8840d22266d518227b2a186d294bKeith Busch status = -EFAULT; 1709f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 17106ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return status; 17116ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox} 17126ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 1713b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 1714b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long arg) 1715b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1716b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = bdev->bd_disk->private_data; 1717b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1718b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox switch (cmd) { 17196bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ID: 1720c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox force_successful_syscall_return(); 17216bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return ns->ns_id; 17226bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ADMIN_CMD: 172350af8baec46a99a9b81a4600c0374f83a5a590a9Keith Busch return nvme_user_admin_cmd(ns->dev, (void __user *)arg); 1724a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox case NVME_IOCTL_SUBMIT_IO: 1725a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return nvme_submit_io(ns, (void __user *)arg); 17265d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_GET_VERSION_NUM: 17275d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_get_version_num((void __user *)arg); 17285d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_IO: 17295d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_io(ns, (void __user *)arg); 1730b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox default: 1731b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOTTY; 1732b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1733b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1734b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1735320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#ifdef CONFIG_COMPAT 1736320a382746e0ab1304476ea7e986a8d416ab99dbKeith Buschstatic int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, 1737320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch unsigned int cmd, unsigned long arg) 1738320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch{ 1739320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch struct nvme_ns *ns = bdev->bd_disk->private_data; 1740320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch 1741320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch switch (cmd) { 1742320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch case SG_IO: 1743320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch return nvme_sg_io32(ns, arg); 1744320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch } 1745320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch return nvme_ioctl(bdev, mode, cmd, arg); 1746320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch} 1747320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#else 1748320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#define nvme_compat_ioctl NULL 1749320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#endif 1750320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch 17519ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Buschstatic int nvme_open(struct block_device *bdev, fmode_t mode) 17529ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch{ 17539ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_ns *ns = bdev->bd_disk->private_data; 17549ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_dev *dev = ns->dev; 17559ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 17569ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch kref_get(&dev->kref); 17579ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch return 0; 17589ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch} 17599ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 17609ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Buschstatic void nvme_free_dev(struct kref *kref); 17619ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 17629ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Buschstatic void nvme_release(struct gendisk *disk, fmode_t mode) 17639ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch{ 17649ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_ns *ns = disk->private_data; 17659ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_dev *dev = ns->dev; 17669ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 17679ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch kref_put(&dev->kref, nvme_free_dev); 17689ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch} 17699ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 17704cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Buschstatic int nvme_getgeo(struct block_device *bd, struct hd_geometry *geo) 17714cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch{ 17724cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch /* some standard values */ 17734cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch geo->heads = 1 << 6; 17744cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch geo->sectors = 1 << 5; 17754cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch geo->cylinders = get_capacity(bd->bd_disk) >> 11; 17764cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch return 0; 17774cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch} 17784cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch 1779b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic const struct block_device_operations nvme_fops = { 1780b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .owner = THIS_MODULE, 1781b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .ioctl = nvme_ioctl, 1782320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch .compat_ioctl = nvme_compat_ioctl, 17839ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch .open = nvme_open, 17849ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch .release = nvme_release, 17854cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch .getgeo = nvme_getgeo, 1786b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1787b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1788edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschstatic void nvme_resubmit_iods(struct nvme_queue *nvmeq) 1789edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch{ 1790edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct nvme_iod *iod, *next; 1791edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch 1792edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch list_for_each_entry_safe(iod, next, &nvmeq->iod_bio, node) { 1793edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (unlikely(nvme_submit_iod(nvmeq, iod))) 1794edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch break; 1795edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch list_del(&iod->node); 1796edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (bio_list_empty(&nvmeq->sq_cong) && 1797edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch list_empty(&nvmeq->iod_bio)) 1798edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch remove_wait_queue(&nvmeq->sq_full, 1799edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch &nvmeq->sq_cong_wait); 1800edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 1801edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch} 1802edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch 18031fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic void nvme_resubmit_bios(struct nvme_queue *nvmeq) 18041fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 18051fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (bio_list_peek(&nvmeq->sq_cong)) { 18061fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 18071fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data; 1808427e97080196548557b288517537ab7eb48c309fKeith Busch 1809edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (bio_list_empty(&nvmeq->sq_cong) && 1810edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch list_empty(&nvmeq->iod_bio)) 1811427e97080196548557b288517537ab7eb48c309fKeith Busch remove_wait_queue(&nvmeq->sq_full, 1812427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 18131fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_submit_bio_queue(nvmeq, ns, bio)) { 1814edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!waitqueue_active(&nvmeq->sq_full)) 1815427e97080196548557b288517537ab7eb48c309fKeith Busch add_wait_queue(&nvmeq->sq_full, 1816427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 18171fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox bio_list_add_head(&nvmeq->sq_cong, bio); 18181fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox break; 18191fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 18201fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 18211fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 18221fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 18231fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic int nvme_kthread(void *data) 18241fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 1825d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch struct nvme_dev *dev, *next; 18261fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 18271fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (!kthread_should_stop()) { 1828564a232c059913d91b491e04c2b2d670b8f94615Arjan van de Ven set_current_state(TASK_INTERRUPTIBLE); 18291fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 1830d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch list_for_each_entry_safe(dev, next, &dev_list, node) { 18311fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox int i; 1832d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch if (readl(&dev->bar->csts) & NVME_CSTS_CFS && 1833d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized) { 1834d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch if (work_busy(&dev->reset_work)) 1835d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch continue; 1836d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch list_del_init(&dev->node); 1837d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev_warn(&dev->pci_dev->dev, 1838d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch "Failed status, reset controller\n"); 18399ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo dev->reset_workfn = nvme_reset_failed_dev; 1840d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch queue_work(nvme_workq, &dev->reset_work); 1841d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch continue; 1842d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch } 18435a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_read_lock(); 18441fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox for (i = 0; i < dev->queue_count; i++) { 18455a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *nvmeq = 18465a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_dereference(dev->queues[i]); 1847740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (!nvmeq) 1848740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox continue; 18491fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1850224042742582c9938788b81165180c876e997a07Keith Busch if (nvmeq->q_suspended) 1851224042742582c9938788b81165180c876e997a07Keith Busch goto unlock; 1852bc57a0f7a44cfcf3e9873f6c6b8dcecdca486b1fMatthew Wilcox nvme_process_cq(nvmeq); 1853a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_cancel_ios(nvmeq, true); 18541fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_resubmit_bios(nvmeq); 1855edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch nvme_resubmit_iods(nvmeq); 1856224042742582c9938788b81165180c876e997a07Keith Busch unlock: 18571fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 18581fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 18595a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_read_unlock(); 18601fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 18611fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 1862acb7aa0db09b8abd38abeb84334a8a27a52fbb1bArjan van de Ven schedule_timeout(round_jiffies_relative(HZ)); 18631fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 18641fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 18651fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 18661fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 18670e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic void nvme_config_discard(struct nvme_ns *ns) 18680e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 18690e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch u32 logical_block_size = queue_logical_block_size(ns->queue); 18700e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_zeroes_data = 0; 18710e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_alignment = logical_block_size; 18720e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_granularity = logical_block_size; 18730e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.max_discard_sectors = 0xffffffff; 18740e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); 18750e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 18760e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 1877c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcoxstatic struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid, 1878b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_id_ns *id, struct nvme_lba_range_type *rt) 1879b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1880b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns; 1881b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct gendisk *disk; 1882b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int lbaf; 1883b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1884b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (rt->attributes & NVME_LBART_ATTRIB_HIDE) 1885b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1886b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1887b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns = kzalloc(sizeof(*ns), GFP_KERNEL); 1888b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns) 1889b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1890b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue = blk_alloc_queue(GFP_KERNEL); 1891b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns->queue) 1892b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_ns; 18934eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox ns->queue->queue_flags = QUEUE_FLAG_DEFAULT; 18944eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); 18954eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); 1896b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_queue_make_request(ns->queue, nvme_make_request); 1897b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->dev = dev; 1898b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue->queuedata = ns; 1899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1900469071a37afc8a627b6b2ddf29db0a097d864845Matthew Wilcox disk = alloc_disk(0); 1901b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!disk) 1902b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_queue; 19035aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ns->ns_id = nsid; 1904b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->disk = disk; 1905b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox lbaf = id->flbas & 0xf; 1906b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->lba_shift = id->lbaf[lbaf].ds; 1907f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); 1908e9ef46369f5107e634a93b7fc4e62a1f53343197Keith Busch blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); 19098fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch if (dev->max_hw_sectors) 19108fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); 1911a7d2ce2832d84e0182585f63bf96ca7323b3aee7Keith Busch if (dev->vwc & NVME_CTRL_VWC_PRESENT) 1912a7d2ce2832d84e0182585f63bf96ca7323b3aee7Keith Busch blk_queue_flush(ns->queue, REQ_FLUSH | REQ_FUA); 1913b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1914b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->major = nvme_major; 1915469071a37afc8a627b6b2ddf29db0a097d864845Matthew Wilcox disk->first_minor = 0; 1916b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->fops = &nvme_fops; 1917b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->private_data = ns; 1918b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->queue = ns->queue; 1919388f037f4e7f0a24bac6b1a24f144f5d939f58cfMatthew Wilcox disk->driverfs_dev = &dev->pci_dev->dev; 1920469071a37afc8a627b6b2ddf29db0a097d864845Matthew Wilcox disk->flags = GENHD_FL_EXT_DEVT; 19215aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); 1922b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); 1923b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19240e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (dev->oncs & NVME_CTRL_ONCS_DSM) 19250e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvme_config_discard(ns); 19260e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 1927b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return ns; 1928b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1929b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_queue: 1930b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1931b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_ns: 1932b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1933b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1934b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1935b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 193642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Buschstatic int nvme_find_closest_node(int node) 193742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch{ 193842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch int n, val, min_val = INT_MAX, best_node = node; 193942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 194042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch for_each_online_node(n) { 194142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (n == node) 194242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch continue; 194342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch val = node_distance(node, n); 194442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (val < min_val) { 194542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch min_val = val; 194642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch best_node = n; 194742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch } 194842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch } 194942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch return best_node; 195042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch} 195142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 195242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Buschstatic void nvme_set_queue_cpus(cpumask_t *qmask, struct nvme_queue *nvmeq, 195342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch int count) 195442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch{ 195542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch int cpu; 195642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch for_each_cpu(cpu, qmask) { 195742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (cpumask_weight(nvmeq->cpu_mask) >= count) 195842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch break; 195942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (!cpumask_test_and_set_cpu(cpu, nvmeq->cpu_mask)) 196042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch *per_cpu_ptr(nvmeq->dev->io_queue, cpu) = nvmeq->qid; 196142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch } 196242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch} 196342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 196442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Buschstatic void nvme_add_cpus(cpumask_t *mask, const cpumask_t *unassigned_cpus, 196542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch const cpumask_t *new_mask, struct nvme_queue *nvmeq, int cpus_per_queue) 196642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch{ 196742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch int next_cpu; 196842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch for_each_cpu(next_cpu, new_mask) { 196942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_or(mask, mask, get_cpu_mask(next_cpu)); 197042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_or(mask, mask, topology_thread_cpumask(next_cpu)); 197142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_and(mask, mask, unassigned_cpus); 197242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_set_queue_cpus(mask, nvmeq, cpus_per_queue); 197342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch } 197442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch} 197542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 197642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Buschstatic void nvme_create_io_queues(struct nvme_dev *dev) 197742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch{ 197842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch unsigned i, max; 197942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 198042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch max = min(dev->max_qid, num_online_cpus()); 198142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch for (i = dev->queue_count; i <= max; i++) 198242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (!nvme_alloc_queue(dev, i, dev->q_depth, i - 1)) 198342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch break; 198442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 198542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch max = min(dev->queue_count - 1, num_online_cpus()); 198642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch for (i = dev->online_queues; i <= max; i++) 198742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (nvme_create_queue(raw_nvmeq(dev, i), i)) 198842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch break; 198942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch} 199042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 199142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch/* 199242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch * If there are fewer queues than online cpus, this will try to optimally 199342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch * assign a queue to multiple cpus by grouping cpus that are "close" together: 199442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch * thread siblings, core, socket, closest node, then whatever else is 199542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch * available. 199642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch */ 199742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Buschstatic void nvme_assign_io_queues(struct nvme_dev *dev) 199842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch{ 199942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch unsigned cpu, cpus_per_queue, queues, remainder, i; 200042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_var_t unassigned_cpus; 200142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 200242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_create_io_queues(dev); 200342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 200442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch queues = min(dev->online_queues - 1, num_online_cpus()); 200542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (!queues) 200642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch return; 200742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 200842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpus_per_queue = num_online_cpus() / queues; 200942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch remainder = queues - (num_online_cpus() - queues * cpus_per_queue); 201042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 201142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (!alloc_cpumask_var(&unassigned_cpus, GFP_KERNEL)) 201242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch return; 201342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 201442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_copy(unassigned_cpus, cpu_online_mask); 201542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpu = cpumask_first(unassigned_cpus); 201642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch for (i = 1; i <= queues; i++) { 201742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch struct nvme_queue *nvmeq = lock_nvmeq(dev, i); 201842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_t mask; 201942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 202042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_clear(nvmeq->cpu_mask); 202142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (!cpumask_weight(unassigned_cpus)) { 202242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch unlock_nvmeq(nvmeq); 202342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch break; 202442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch } 202542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 202642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch mask = *get_cpu_mask(cpu); 202742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_set_queue_cpus(&mask, nvmeq, cpus_per_queue); 202842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (cpus_weight(mask) < cpus_per_queue) 202942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_add_cpus(&mask, unassigned_cpus, 203042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch topology_thread_cpumask(cpu), 203142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq, cpus_per_queue); 203242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (cpus_weight(mask) < cpus_per_queue) 203342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_add_cpus(&mask, unassigned_cpus, 203442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch topology_core_cpumask(cpu), 203542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq, cpus_per_queue); 203642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (cpus_weight(mask) < cpus_per_queue) 203742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_add_cpus(&mask, unassigned_cpus, 203842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_of_node(cpu_to_node(cpu)), 203942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq, cpus_per_queue); 204042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (cpus_weight(mask) < cpus_per_queue) 204142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_add_cpus(&mask, unassigned_cpus, 204242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_of_node( 204342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_find_closest_node( 204442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpu_to_node(cpu))), 204542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq, cpus_per_queue); 204642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (cpus_weight(mask) < cpus_per_queue) 204742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_add_cpus(&mask, unassigned_cpus, 204842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch unassigned_cpus, 204942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq, cpus_per_queue); 205042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 205142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch WARN(cpumask_weight(nvmeq->cpu_mask) != cpus_per_queue, 205242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch "nvme%d qid:%d mis-matched queue-to-cpu assignment\n", 205342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dev->instance, i); 205442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 205542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch irq_set_affinity_hint(dev->entry[nvmeq->cq_vector].vector, 205642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq->cpu_mask); 205742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_andnot(unassigned_cpus, unassigned_cpus, 205842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq->cpu_mask); 205942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpu = cpumask_next(cpu, unassigned_cpus); 206042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (remainder && !--remainder) 206142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpus_per_queue++; 206242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch unlock_nvmeq(nvmeq); 206342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch } 206442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch WARN(cpumask_weight(unassigned_cpus), "nvme%d unassigned online cpus\n", 206542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dev->instance); 206642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch i = 0; 206742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_andnot(unassigned_cpus, cpu_possible_mask, cpu_online_mask); 206842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch for_each_cpu(cpu, unassigned_cpus) 206942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch *per_cpu_ptr(dev->io_queue, cpu) = (i++ % queues) + 1; 207042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch free_cpumask_var(unassigned_cpus); 207142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch} 207242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 2073b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcoxstatic int set_queue_count(struct nvme_dev *dev, int count) 2074b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2075b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 2076b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 result; 2077b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcox u32 q_count = (count - 1) | ((count - 1) << 16); 2078b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2079df3481399042200792822b6243e36a95a557b57eMatthew Wilcox status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, 2080bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox &result); 208127e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox if (status < 0) 208227e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox return status; 208327e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox if (status > 0) { 208427e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox dev_err(&dev->pci_dev->dev, "Could not set queue count (%d)\n", 208527e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox status); 208627e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox return -EBUSY; 208727e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox } 2088b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return min(result & 0xffff, result >> 16) + 1; 2089b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2090b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 20919d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Buschstatic size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) 20929d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch{ 2093b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu return 4096 + ((nr_io_queues + 1) * 8 * dev->db_stride); 20949d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch} 20959d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch 209633b1e95c90447ea73e37e837ea0268a894919f19Keith Buschstatic int nvme_cpu_notify(struct notifier_block *self, 209733b1e95c90447ea73e37e837ea0268a894919f19Keith Busch unsigned long action, void *hcpu) 209833b1e95c90447ea73e37e837ea0268a894919f19Keith Busch{ 209933b1e95c90447ea73e37e837ea0268a894919f19Keith Busch struct nvme_dev *dev = container_of(self, struct nvme_dev, nb); 210033b1e95c90447ea73e37e837ea0268a894919f19Keith Busch switch (action) { 210133b1e95c90447ea73e37e837ea0268a894919f19Keith Busch case CPU_ONLINE: 210233b1e95c90447ea73e37e837ea0268a894919f19Keith Busch case CPU_DEAD: 210333b1e95c90447ea73e37e837ea0268a894919f19Keith Busch nvme_assign_io_queues(dev); 210433b1e95c90447ea73e37e837ea0268a894919f19Keith Busch break; 210533b1e95c90447ea73e37e837ea0268a894919f19Keith Busch } 210633b1e95c90447ea73e37e837ea0268a894919f19Keith Busch return NOTIFY_OK; 210733b1e95c90447ea73e37e837ea0268a894919f19Keith Busch} 210833b1e95c90447ea73e37e837ea0268a894919f19Keith Busch 21098d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_setup_io_queues(struct nvme_dev *dev) 2110b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 21115a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *adminq = raw_nvmeq(dev, 0); 2112fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula struct pci_dev *pdev = dev->pci_dev; 211342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch int result, i, vecs, nr_io_queues, size; 2114b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 211542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nr_io_queues = num_possible_cpus(); 2116b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = set_queue_count(dev, nr_io_queues); 21171b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result < 0) 21181b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox return result; 2119b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox if (result < nr_io_queues) 2120b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 2121b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 21229d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch size = db_bar_size(dev, nr_io_queues); 21239d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (size > 8192) { 2124f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox iounmap(dev->bar); 21259d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch do { 21269d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch dev->bar = ioremap(pci_resource_start(pdev, 0), size); 21279d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (dev->bar) 21289d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch break; 21299d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (!--nr_io_queues) 21309d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch return -ENOMEM; 21319d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch size = db_bar_size(dev, nr_io_queues); 21329d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch } while (1); 2133f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 21345a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch adminq->q_db = dev->dbs; 2135f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox } 2136f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox 21379d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch /* Deregister the admin queue's interrupt */ 21383193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox free_irq(dev->entry[0].vector, adminq); 21399d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch 2140be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev for (i = 0; i < nr_io_queues; i++) 21411b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->entry[i].entry = i; 2142be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev vecs = pci_enable_msix_range(pdev, dev->entry, 1, nr_io_queues); 2143be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev if (vecs < 0) { 2144be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev vecs = pci_enable_msi_range(pdev, 1, min(nr_io_queues, 32)); 2145be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev if (vecs < 0) { 2146be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev vecs = 1; 2147be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev } else { 2148be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev for (i = 0; i < vecs; i++) 2149be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev dev->entry[i].vector = i + pdev->irq; 2150fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 2151fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 2152fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula 2153063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox /* 2154063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * Should investigate if there's a performance win from allocating 2155063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * more queues than interrupt vectors; it might allow the submission 2156063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * path to scale better, even if the receive path is limited by the 2157063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * number of interrupts. 2158063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox */ 2159063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox nr_io_queues = vecs; 216042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dev->max_qid = nr_io_queues; 2161063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox 21623193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox result = queue_request_irq(dev, adminq, adminq->irqname); 21639d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (result) { 21643193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox adminq->q_suspended = 1; 2165224042742582c9938788b81165180c876e997a07Keith Busch goto free_queues; 21669d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch } 21671b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 2168cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch /* Free previously allocated queues that are no longer usable */ 216942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_free_queues(dev, nr_io_queues + 1); 217042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_assign_io_queues(dev); 21719ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox 217233b1e95c90447ea73e37e837ea0268a894919f19Keith Busch dev->nb.notifier_call = &nvme_cpu_notify; 217333b1e95c90447ea73e37e837ea0268a894919f19Keith Busch result = register_hotcpu_notifier(&dev->nb); 217433b1e95c90447ea73e37e837ea0268a894919f19Keith Busch if (result) 217533b1e95c90447ea73e37e837ea0268a894919f19Keith Busch goto free_queues; 2176b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2177224042742582c9938788b81165180c876e997a07Keith Busch return 0; 2178b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2179224042742582c9938788b81165180c876e997a07Keith Busch free_queues: 2180a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_free_queues(dev, 1); 2181224042742582c9938788b81165180c876e997a07Keith Busch return result; 2182b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2183b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2184422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox/* 2185422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Return: error value if an error occurred setting up the queues or calling 2186422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Identify Device. 0 if these succeeded, even if adding some of the 2187422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * namespaces failed. At the moment, these failures are silent. TBD which 2188422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * failures should be reported. 2189422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox */ 21908d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_dev_add(struct nvme_dev *dev) 2191b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 219268608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox struct pci_dev *pdev = dev->pci_dev; 2193c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox int res; 2194c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox unsigned nn, i; 2195cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch struct nvme_ns *ns; 219651814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox struct nvme_id_ctrl *ctrl; 2197bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_id_ns *id_ns; 2198bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox void *mem; 2199b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t dma_addr; 2200159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12; 2201b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 220268608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox mem = dma_alloc_coherent(&pdev->dev, 8192, &dma_addr, GFP_KERNEL); 2203a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch if (!mem) 2204a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch return -ENOMEM; 2205b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2206bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, 0, 1, dma_addr); 2207b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) { 220827e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox dev_err(&pdev->dev, "Identify Controller failed (%d)\n", res); 2209b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = -EIO; 2210cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch goto out; 2211b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 2212b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2213bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ctrl = mem; 221451814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox nn = le32_to_cpup(&ctrl->nn); 22150e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch dev->oncs = le16_to_cpup(&ctrl->oncs); 2216c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev->abort_limit = ctrl->acl + 1; 2217a7d2ce2832d84e0182585f63bf96ca7323b3aee7Keith Busch dev->vwc = ctrl->vwc; 221851814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); 221951814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); 222051814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); 2221159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (ctrl->mdts) 22228fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); 222368608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox if ((pdev->vendor == PCI_VENDOR_ID_INTEL) && 222468608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox (pdev->device == 0x0953) && ctrl->vs[3]) 2225159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch dev->stripe_size = 1 << (ctrl->vs[3] + shift); 2226b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2227bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox id_ns = mem; 22282b2c1896871838cdf549442e8ad0264be5fa74e3Matthew Wilcox for (i = 1; i <= nn; i++) { 2229bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, i, 0, dma_addr); 2230b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 2231b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 2232b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2233bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox if (id_ns->ncap == 0) 2234b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 2235b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2236bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_get_features(dev, NVME_FEAT_LBA_RANGE, i, 223708df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr + 4096, NULL); 2238b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 2239122090366d1d5c6ec1bfb6dfdb3a6d121ff074aaKeith Busch memset(mem + 4096, 0, 4096); 2240b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2241bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ns = nvme_alloc_ns(dev, i, mem, mem + 4096); 2242b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (ns) 2243b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_add_tail(&ns->list, &dev->namespaces); 2244b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 2245b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry(ns, &dev->namespaces, list) 2246b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox add_disk(ns->disk); 2247422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox res = 0; 2248b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2249bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox out: 2250684f5c2025b067a23722e620d0b3b858d8dc5d01Matthew Wilcox dma_free_coherent(&dev->pci_dev->dev, 8192, mem, dma_addr); 2251b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 2252b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2253b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 22540877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Buschstatic int nvme_dev_map(struct nvme_dev *dev) 22550877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch{ 225642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch u64 cap; 22570877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch int bars, result = -ENOMEM; 22580877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch struct pci_dev *pdev = dev->pci_dev; 22590877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 22600877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (pci_enable_device_mem(pdev)) 22610877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch return result; 22620877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 22630877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->entry[0].vector = pdev->irq; 22640877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_set_master(pdev); 22650877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch bars = pci_select_bars(pdev, IORESOURCE_MEM); 22660877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (pci_request_selected_regions(pdev, bars, "nvme")) 22670877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto disable_pci; 22680877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 2269052d0efada8ccfccd924059b75f5fb119cd10f9aRussell King if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) && 2270052d0efada8ccfccd924059b75f5fb119cd10f9aRussell King dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) 2271052d0efada8ccfccd924059b75f5fb119cd10f9aRussell King goto disable; 22720877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 22730877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 22740877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (!dev->bar) 22750877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto disable; 22760e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch if (readl(&dev->bar->csts) == -1) { 22770e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch result = -ENODEV; 22780e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch goto unmap; 22790e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch } 228042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cap = readq(&dev->bar->cap); 228142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dev->q_depth = min_t(int, NVME_CAP_MQES(cap) + 1, NVME_Q_DEPTH); 228242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dev->db_stride = 1 << NVME_CAP_STRIDE(cap); 22830877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->dbs = ((void __iomem *)dev->bar) + 4096; 22840877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 22850877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch return 0; 22860877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 22870e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch unmap: 22880e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch iounmap(dev->bar); 22890e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch dev->bar = NULL; 22900877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch disable: 22910877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_release_regions(pdev); 22920877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch disable_pci: 22930877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_device(pdev); 22940877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch return result; 22950877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch} 22960877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 22970877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Buschstatic void nvme_dev_unmap(struct nvme_dev *dev) 22980877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch{ 22990877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (dev->pci_dev->msi_enabled) 23000877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_msi(dev->pci_dev); 23010877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch else if (dev->pci_dev->msix_enabled) 23020877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_msix(dev->pci_dev); 23030877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 23040877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (dev->bar) { 23050877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch iounmap(dev->bar); 23060877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->bar = NULL; 23079a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_release_regions(dev->pci_dev); 23080877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch } 23090877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 23100877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (pci_is_enabled(dev->pci_dev)) 23110877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_device(dev->pci_dev); 23120877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch} 23130877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 23144d115420707afcabe77d2535e092356df6664b70Keith Buschstruct nvme_delq_ctx { 23154d115420707afcabe77d2535e092356df6664b70Keith Busch struct task_struct *waiter; 23164d115420707afcabe77d2535e092356df6664b70Keith Busch struct kthread_worker *worker; 23174d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_t refcount; 23184d115420707afcabe77d2535e092356df6664b70Keith Busch}; 23194d115420707afcabe77d2535e092356df6664b70Keith Busch 23204d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_wait_dq(struct nvme_delq_ctx *dq, struct nvme_dev *dev) 23214d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23224d115420707afcabe77d2535e092356df6664b70Keith Busch dq->waiter = current; 23234d115420707afcabe77d2535e092356df6664b70Keith Busch mb(); 23244d115420707afcabe77d2535e092356df6664b70Keith Busch 23254d115420707afcabe77d2535e092356df6664b70Keith Busch for (;;) { 23264d115420707afcabe77d2535e092356df6664b70Keith Busch set_current_state(TASK_KILLABLE); 23274d115420707afcabe77d2535e092356df6664b70Keith Busch if (!atomic_read(&dq->refcount)) 23284d115420707afcabe77d2535e092356df6664b70Keith Busch break; 23294d115420707afcabe77d2535e092356df6664b70Keith Busch if (!schedule_timeout(ADMIN_TIMEOUT) || 23304d115420707afcabe77d2535e092356df6664b70Keith Busch fatal_signal_pending(current)) { 23314d115420707afcabe77d2535e092356df6664b70Keith Busch set_current_state(TASK_RUNNING); 23324d115420707afcabe77d2535e092356df6664b70Keith Busch 23334d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_ctrl(dev, readq(&dev->bar->cap)); 23344d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_queue(dev, 0); 23354d115420707afcabe77d2535e092356df6664b70Keith Busch 23364d115420707afcabe77d2535e092356df6664b70Keith Busch send_sig(SIGKILL, dq->worker->task, 1); 23374d115420707afcabe77d2535e092356df6664b70Keith Busch flush_kthread_worker(dq->worker); 23384d115420707afcabe77d2535e092356df6664b70Keith Busch return; 23394d115420707afcabe77d2535e092356df6664b70Keith Busch } 23404d115420707afcabe77d2535e092356df6664b70Keith Busch } 23414d115420707afcabe77d2535e092356df6664b70Keith Busch set_current_state(TASK_RUNNING); 23424d115420707afcabe77d2535e092356df6664b70Keith Busch} 23434d115420707afcabe77d2535e092356df6664b70Keith Busch 23444d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_put_dq(struct nvme_delq_ctx *dq) 23454d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23464d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_dec(&dq->refcount); 23474d115420707afcabe77d2535e092356df6664b70Keith Busch if (dq->waiter) 23484d115420707afcabe77d2535e092356df6664b70Keith Busch wake_up_process(dq->waiter); 23494d115420707afcabe77d2535e092356df6664b70Keith Busch} 23504d115420707afcabe77d2535e092356df6664b70Keith Busch 23514d115420707afcabe77d2535e092356df6664b70Keith Buschstatic struct nvme_delq_ctx *nvme_get_dq(struct nvme_delq_ctx *dq) 23524d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23534d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_inc(&dq->refcount); 23544d115420707afcabe77d2535e092356df6664b70Keith Busch return dq; 23554d115420707afcabe77d2535e092356df6664b70Keith Busch} 23564d115420707afcabe77d2535e092356df6664b70Keith Busch 23574d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_queue_end(struct nvme_queue *nvmeq) 23584d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23594d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_delq_ctx *dq = nvmeq->cmdinfo.ctx; 23604d115420707afcabe77d2535e092356df6664b70Keith Busch 23614d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_clear_queue(nvmeq); 23624d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_put_dq(dq); 23634d115420707afcabe77d2535e092356df6664b70Keith Busch} 23644d115420707afcabe77d2535e092356df6664b70Keith Busch 23654d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int adapter_async_del_queue(struct nvme_queue *nvmeq, u8 opcode, 23664d115420707afcabe77d2535e092356df6664b70Keith Busch kthread_work_func_t fn) 23674d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23684d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_command c; 23694d115420707afcabe77d2535e092356df6664b70Keith Busch 23704d115420707afcabe77d2535e092356df6664b70Keith Busch memset(&c, 0, sizeof(c)); 23714d115420707afcabe77d2535e092356df6664b70Keith Busch c.delete_queue.opcode = opcode; 23724d115420707afcabe77d2535e092356df6664b70Keith Busch c.delete_queue.qid = cpu_to_le16(nvmeq->qid); 23734d115420707afcabe77d2535e092356df6664b70Keith Busch 23744d115420707afcabe77d2535e092356df6664b70Keith Busch init_kthread_work(&nvmeq->cmdinfo.work, fn); 23754d115420707afcabe77d2535e092356df6664b70Keith Busch return nvme_submit_admin_cmd_async(nvmeq->dev, &c, &nvmeq->cmdinfo); 23764d115420707afcabe77d2535e092356df6664b70Keith Busch} 23774d115420707afcabe77d2535e092356df6664b70Keith Busch 23784d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_cq_work_handler(struct kthread_work *work) 23794d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23804d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 23814d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo.work); 23824d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_queue_end(nvmeq); 23834d115420707afcabe77d2535e092356df6664b70Keith Busch} 23844d115420707afcabe77d2535e092356df6664b70Keith Busch 23854d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_delete_cq(struct nvme_queue *nvmeq) 23864d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23874d115420707afcabe77d2535e092356df6664b70Keith Busch return adapter_async_del_queue(nvmeq, nvme_admin_delete_cq, 23884d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_cq_work_handler); 23894d115420707afcabe77d2535e092356df6664b70Keith Busch} 23904d115420707afcabe77d2535e092356df6664b70Keith Busch 23914d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_sq_work_handler(struct kthread_work *work) 23924d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23934d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 23944d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo.work); 23954d115420707afcabe77d2535e092356df6664b70Keith Busch int status = nvmeq->cmdinfo.status; 23964d115420707afcabe77d2535e092356df6664b70Keith Busch 23974d115420707afcabe77d2535e092356df6664b70Keith Busch if (!status) 23984d115420707afcabe77d2535e092356df6664b70Keith Busch status = nvme_delete_cq(nvmeq); 23994d115420707afcabe77d2535e092356df6664b70Keith Busch if (status) 24004d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_queue_end(nvmeq); 24014d115420707afcabe77d2535e092356df6664b70Keith Busch} 24024d115420707afcabe77d2535e092356df6664b70Keith Busch 24034d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_delete_sq(struct nvme_queue *nvmeq) 24044d115420707afcabe77d2535e092356df6664b70Keith Busch{ 24054d115420707afcabe77d2535e092356df6664b70Keith Busch return adapter_async_del_queue(nvmeq, nvme_admin_delete_sq, 24064d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_sq_work_handler); 24074d115420707afcabe77d2535e092356df6664b70Keith Busch} 24084d115420707afcabe77d2535e092356df6664b70Keith Busch 24094d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_queue_start(struct kthread_work *work) 24104d115420707afcabe77d2535e092356df6664b70Keith Busch{ 24114d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 24124d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo.work); 24134d115420707afcabe77d2535e092356df6664b70Keith Busch allow_signal(SIGKILL); 24144d115420707afcabe77d2535e092356df6664b70Keith Busch if (nvme_delete_sq(nvmeq)) 24154d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_queue_end(nvmeq); 24164d115420707afcabe77d2535e092356df6664b70Keith Busch} 24174d115420707afcabe77d2535e092356df6664b70Keith Busch 24184d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_disable_io_queues(struct nvme_dev *dev) 24194d115420707afcabe77d2535e092356df6664b70Keith Busch{ 24204d115420707afcabe77d2535e092356df6664b70Keith Busch int i; 24214d115420707afcabe77d2535e092356df6664b70Keith Busch DEFINE_KTHREAD_WORKER_ONSTACK(worker); 24224d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_delq_ctx dq; 24234d115420707afcabe77d2535e092356df6664b70Keith Busch struct task_struct *kworker_task = kthread_run(kthread_worker_fn, 24244d115420707afcabe77d2535e092356df6664b70Keith Busch &worker, "nvme%d", dev->instance); 24254d115420707afcabe77d2535e092356df6664b70Keith Busch 24264d115420707afcabe77d2535e092356df6664b70Keith Busch if (IS_ERR(kworker_task)) { 24274d115420707afcabe77d2535e092356df6664b70Keith Busch dev_err(&dev->pci_dev->dev, 24284d115420707afcabe77d2535e092356df6664b70Keith Busch "Failed to create queue del task\n"); 24294d115420707afcabe77d2535e092356df6664b70Keith Busch for (i = dev->queue_count - 1; i > 0; i--) 24304d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_queue(dev, i); 24314d115420707afcabe77d2535e092356df6664b70Keith Busch return; 24324d115420707afcabe77d2535e092356df6664b70Keith Busch } 24334d115420707afcabe77d2535e092356df6664b70Keith Busch 24344d115420707afcabe77d2535e092356df6664b70Keith Busch dq.waiter = NULL; 24354d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_set(&dq.refcount, 0); 24364d115420707afcabe77d2535e092356df6664b70Keith Busch dq.worker = &worker; 24374d115420707afcabe77d2535e092356df6664b70Keith Busch for (i = dev->queue_count - 1; i > 0; i--) { 24385a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *nvmeq = raw_nvmeq(dev, i); 24394d115420707afcabe77d2535e092356df6664b70Keith Busch 24404d115420707afcabe77d2535e092356df6664b70Keith Busch if (nvme_suspend_queue(nvmeq)) 24414d115420707afcabe77d2535e092356df6664b70Keith Busch continue; 24424d115420707afcabe77d2535e092356df6664b70Keith Busch nvmeq->cmdinfo.ctx = nvme_get_dq(&dq); 24434d115420707afcabe77d2535e092356df6664b70Keith Busch nvmeq->cmdinfo.worker = dq.worker; 24444d115420707afcabe77d2535e092356df6664b70Keith Busch init_kthread_work(&nvmeq->cmdinfo.work, nvme_del_queue_start); 24454d115420707afcabe77d2535e092356df6664b70Keith Busch queue_kthread_work(dq.worker, &nvmeq->cmdinfo.work); 24464d115420707afcabe77d2535e092356df6664b70Keith Busch } 24474d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_wait_dq(&dq, dev); 24484d115420707afcabe77d2535e092356df6664b70Keith Busch kthread_stop(kworker_task); 24494d115420707afcabe77d2535e092356df6664b70Keith Busch} 24504d115420707afcabe77d2535e092356df6664b70Keith Busch 2451b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran/* 2452b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran* Remove the node from the device list and check 2453b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran* for whether or not we need to stop the nvme_thread. 2454b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran*/ 2455b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeranstatic void nvme_dev_list_remove(struct nvme_dev *dev) 2456b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran{ 2457b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran struct task_struct *tmp = NULL; 2458b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran 2459b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran spin_lock(&dev_list_lock); 2460b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran list_del_init(&dev->node); 2461b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran if (list_empty(&dev_list) && !IS_ERR_OR_NULL(nvme_thread)) { 2462b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran tmp = nvme_thread; 2463b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran nvme_thread = NULL; 2464b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran } 2465b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran spin_unlock(&dev_list_lock); 2466b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran 2467b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran if (tmp) 2468b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran kthread_stop(tmp); 2469b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran} 2470b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran 2471f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Buschstatic void nvme_dev_shutdown(struct nvme_dev *dev) 2472b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2473224042742582c9938788b81165180c876e997a07Keith Busch int i; 2474224042742582c9938788b81165180c876e997a07Keith Busch 2475d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized = 0; 247633b1e95c90447ea73e37e837ea0268a894919f19Keith Busch unregister_hotcpu_notifier(&dev->nb); 2477b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2478b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran nvme_dev_list_remove(dev); 24791fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 24804d115420707afcabe77d2535e092356df6664b70Keith Busch if (!dev->bar || (dev->bar && readl(&dev->bar->csts) == -1)) { 24814d115420707afcabe77d2535e092356df6664b70Keith Busch for (i = dev->queue_count - 1; i >= 0; i--) { 24825a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *nvmeq = raw_nvmeq(dev, i); 24834d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_suspend_queue(nvmeq); 24844d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_clear_queue(nvmeq); 24854d115420707afcabe77d2535e092356df6664b70Keith Busch } 24864d115420707afcabe77d2535e092356df6664b70Keith Busch } else { 24874d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_io_queues(dev); 24881894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch nvme_shutdown_ctrl(dev); 24894d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_queue(dev, 0); 24904d115420707afcabe77d2535e092356df6664b70Keith Busch } 2491f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_dev_unmap(dev); 2492f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch} 2493f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2494f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Buschstatic void nvme_dev_remove(struct nvme_dev *dev) 2495f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch{ 24969ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_ns *ns; 2497f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 24989ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch list_for_each_entry(ns, &dev->namespaces, list) { 24999ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch if (ns->disk->flags & GENHD_FL_UP) 25009ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch del_gendisk(ns->disk); 25019ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch if (!blk_queue_dying(ns->queue)) 25029ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch blk_cleanup_queue(ns->queue); 2503b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 2504b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2505b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2506091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic int nvme_setup_prp_pools(struct nvme_dev *dev) 2507091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 2508091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 2509091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dev->prp_page_pool = dma_pool_create("prp list page", dmadev, 2510091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox PAGE_SIZE, PAGE_SIZE, 0); 2511091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (!dev->prp_page_pool) 2512091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return -ENOMEM; 2513091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 251499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox /* Optimisation for I/Os between 4k and 128k */ 251599802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dev->prp_small_pool = dma_pool_create("prp list 256", dmadev, 251699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 256, 256, 0); 251799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (!dev->prp_small_pool) { 251899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 251999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox return -ENOMEM; 252099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 2521091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return 0; 2522091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 2523091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2524091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic void nvme_release_prp_pools(struct nvme_dev *dev) 2525091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 2526091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 252799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_small_pool); 2528091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 2529091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2530cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic DEFINE_IDA(nvme_instance_ida); 2531cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2532cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic int nvme_set_instance(struct nvme_dev *dev) 2533b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2534cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh int instance, error; 2535cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2536cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh do { 2537cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) 2538cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 2539cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2540cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 2541cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh error = ida_get_new(&nvme_instance_ida, &instance); 2542cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 2543cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh } while (error == -EAGAIN); 2544cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2545cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (error) 2546cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 2547cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2548cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh dev->instance = instance; 2549cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return 0; 2550b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2551b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2552b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_release_instance(struct nvme_dev *dev) 2553b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2554cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 2555cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh ida_remove(&nvme_instance_ida, dev->instance); 2556cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 2557b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2558b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 25599ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Buschstatic void nvme_free_namespaces(struct nvme_dev *dev) 25609ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch{ 25619ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_ns *ns, *next; 25629ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 25639ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 25649ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch list_del(&ns->list); 25659ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch put_disk(ns->disk); 25669ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch kfree(ns); 25679ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch } 25689ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch} 25699ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 25705e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic void nvme_free_dev(struct kref *kref) 25715e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 25725e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref); 25739ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 25749ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch nvme_free_namespaces(dev); 257542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch free_percpu(dev->io_queue); 25765e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->queues); 25775e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->entry); 25785e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev); 25795e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 25805e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 25815e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_open(struct inode *inode, struct file *f) 25825e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 25835e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(f->private_data, struct nvme_dev, 25845e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch miscdev); 25855e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_get(&dev->kref); 25865e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch f->private_data = dev; 25875e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 25885e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 25895e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 25905e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_release(struct inode *inode, struct file *f) 25915e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 25925e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 25935e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 25945e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 25955e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 25965e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 25975e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg) 25985e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 25995e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 26005e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch switch (cmd) { 26015e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch case NVME_IOCTL_ADMIN_CMD: 26025e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return nvme_user_admin_cmd(dev, (void __user *)arg); 26035e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch default: 26045e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return -ENOTTY; 26055e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch } 26065e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 26075e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 26085e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic const struct file_operations nvme_dev_fops = { 26095e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .owner = THIS_MODULE, 26105e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .open = nvme_dev_open, 26115e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .release = nvme_dev_release, 26125e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .unlocked_ioctl = nvme_dev_ioctl, 26135e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .compat_ioctl = nvme_dev_ioctl, 26145e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch}; 26155e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 2616f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Buschstatic int nvme_dev_start(struct nvme_dev *dev) 2617f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch{ 2618f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch int result; 2619b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran bool start_thread = false; 2620f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2621f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_dev_map(dev); 2622f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch if (result) 2623f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch return result; 2624f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2625f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_configure_admin_queue(dev); 2626f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch if (result) 2627f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch goto unmap; 2628f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2629f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_lock(&dev_list_lock); 2630b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran if (list_empty(&dev_list) && IS_ERR_OR_NULL(nvme_thread)) { 2631b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran start_thread = true; 2632b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran nvme_thread = NULL; 2633b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran } 2634f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch list_add(&dev->node, &dev_list); 2635f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_unlock(&dev_list_lock); 2636f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2637b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran if (start_thread) { 2638b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 2639b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran wake_up(&nvme_kthread_wait); 2640b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran } else 2641b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran wait_event_killable(nvme_kthread_wait, nvme_thread); 2642b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran 2643b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran if (IS_ERR_OR_NULL(nvme_thread)) { 2644b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran result = nvme_thread ? PTR_ERR(nvme_thread) : -EINTR; 2645b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran goto disable; 2646b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran } 2647b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran 2648f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_setup_io_queues(dev); 2649d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result && result != -EBUSY) 2650f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch goto disable; 2651f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2652d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch return result; 2653f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2654f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch disable: 2655a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_disable_queue(dev, 0); 2656b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran nvme_dev_list_remove(dev); 2657f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch unmap: 2658f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_dev_unmap(dev); 2659f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch return result; 2660f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch} 2661f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 26629a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic int nvme_remove_dead_ctrl(void *arg) 26639a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 26649a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct nvme_dev *dev = (struct nvme_dev *)arg; 26659a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct pci_dev *pdev = dev->pci_dev; 26669a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 26679a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (pci_get_drvdata(pdev)) 26689a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_stop_and_remove_bus_device(pdev); 26699a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kref_put(&dev->kref, nvme_free_dev); 26709a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return 0; 26719a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 26729a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 26739a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic void nvme_remove_disks(struct work_struct *ws) 26749a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 26759a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); 26769a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 26779a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_remove(dev); 26785a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch nvme_free_queues(dev, 1); 26799a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 26809a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 26819a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic int nvme_dev_resume(struct nvme_dev *dev) 26829a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 26839a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch int ret; 26849a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 26859a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch ret = nvme_dev_start(dev); 26869a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (ret && ret != -EBUSY) 26879a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return ret; 26889a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (ret == -EBUSY) { 26899a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_lock(&dev_list_lock); 26909ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo dev->reset_workfn = nvme_remove_disks; 26919a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch queue_work(nvme_workq, &dev->reset_work); 26929a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_unlock(&dev_list_lock); 26939a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 2694d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized = 1; 26959a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return 0; 26969a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 26979a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 26989a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic void nvme_dev_reset(struct nvme_dev *dev) 26999a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 27009a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_shutdown(dev); 27019a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (nvme_dev_resume(dev)) { 27029a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev_err(&dev->pci_dev->dev, "Device failed to resume\n"); 27039a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kref_get(&dev->kref); 27049a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (IS_ERR(kthread_run(nvme_remove_dead_ctrl, dev, "nvme%d", 27059a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev->instance))) { 27069a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev_err(&dev->pci_dev->dev, 27079a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch "Failed to start controller remove task\n"); 27089a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kref_put(&dev->kref, nvme_free_dev); 27099a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 27109a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 27119a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 27129a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 27139a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic void nvme_reset_failed_dev(struct work_struct *ws) 27149a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 27159a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); 27169a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_reset(dev); 27179a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 27189a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 27199ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heostatic void nvme_reset_workfn(struct work_struct *work) 27209ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo{ 27219ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo struct nvme_dev *dev = container_of(work, struct nvme_dev, reset_work); 27229ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo dev->reset_workfn(work); 27239ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo} 27249ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo 27258d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) 2726b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 27270877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch int result = -ENOMEM; 2728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev; 2729b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2730b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev = kzalloc(sizeof(*dev), GFP_KERNEL); 2731b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev) 2732b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOMEM; 2733b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->entry = kcalloc(num_possible_cpus(), sizeof(*dev->entry), 2734b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 2735b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->entry) 2736b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 27371b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queues = kcalloc(num_possible_cpus() + 1, sizeof(void *), 27381b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox GFP_KERNEL); 2739b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->queues) 2740b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 274142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dev->io_queue = alloc_percpu(unsigned short); 274242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (!dev->io_queue) 274342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch goto free; 2744b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2745b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox INIT_LIST_HEAD(&dev->namespaces); 27469ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo dev->reset_workfn = nvme_reset_failed_dev; 27479ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo INIT_WORK(&dev->reset_work, nvme_reset_workfn); 2748b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->pci_dev = pdev; 27499a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_set_drvdata(pdev, dev); 2750cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh result = nvme_set_instance(dev); 2751cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (result) 27520877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto free; 2753b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2754091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox result = nvme_setup_prp_pools(dev); 2755091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (result) 27560877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto release; 2757091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2758fb35e914b3f88cda9ee6f9d776910c35269c4ecfKeith Busch kref_init(&dev->kref); 2759f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_dev_start(dev); 2760d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result) { 2761d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result == -EBUSY) 2762d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch goto create_cdev; 27630877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto release_pools; 2764d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch } 2765b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2766740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox result = nvme_dev_add(dev); 2767d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result) 2768f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch goto shutdown; 2769740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 2770d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch create_cdev: 27715e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch scnprintf(dev->name, sizeof(dev->name), "nvme%d", dev->instance); 27725e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.minor = MISC_DYNAMIC_MINOR; 27735e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.parent = &pdev->dev; 27745e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.name = dev->name; 27755e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.fops = &nvme_dev_fops; 27765e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch result = misc_register(&dev->miscdev); 27775e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch if (result) 27785e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch goto remove; 27795e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 2780d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized = 1; 2781b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 2782b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 27835e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch remove: 27845e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_dev_remove(dev); 27859ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch nvme_free_namespaces(dev); 2786f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch shutdown: 2787f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_dev_shutdown(dev); 27880877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch release_pools: 2789a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_free_queues(dev, 0); 2790091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 27910877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch release: 27920877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch nvme_release_instance(dev); 2793b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free: 279442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch free_percpu(dev->io_queue); 2795b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 2796b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 2797b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 2798b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 2799b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2800b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 280109ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Buschstatic void nvme_shutdown(struct pci_dev *pdev) 280209ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch{ 280309ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch struct nvme_dev *dev = pci_get_drvdata(pdev); 280409ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch nvme_dev_shutdown(dev); 280509ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch} 280609ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch 28078d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic void nvme_remove(struct pci_dev *pdev) 2808b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2809b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev = pci_get_drvdata(pdev); 28109a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 28119a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_lock(&dev_list_lock); 28129a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch list_del_init(&dev->node); 28139a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_unlock(&dev_list_lock); 28149a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 28159a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_set_drvdata(pdev, NULL); 28169a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch flush_work(&dev->reset_work); 28175e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch misc_deregister(&dev->miscdev); 28189a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_remove(dev); 28199a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_shutdown(dev); 2820a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_free_queues(dev, 0); 28215a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_barrier(); 28229a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_release_instance(dev); 28239a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_release_prp_pools(dev); 28245e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 2825b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2826b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2827b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* These functions are yet to be implemented */ 2828b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_detected NULL 2829b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_dump_registers NULL 2830b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_link_reset NULL 2831b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_slot_reset NULL 2832b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_resume NULL 2833cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2834671a6018db1d359254c8201704cf967efb42fc25Jingoo Han#ifdef CONFIG_PM_SLEEP 2835cd63894630ab17a192bf97427d16dbec10710a6aKeith Buschstatic int nvme_suspend(struct device *dev) 2836cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch{ 2837cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct pci_dev *pdev = to_pci_dev(dev); 2838cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct nvme_dev *ndev = pci_get_drvdata(pdev); 2839cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2840cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvme_dev_shutdown(ndev); 2841cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return 0; 2842cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch} 2843cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2844cd63894630ab17a192bf97427d16dbec10710a6aKeith Buschstatic int nvme_resume(struct device *dev) 2845cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch{ 2846cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct pci_dev *pdev = to_pci_dev(dev); 2847cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct nvme_dev *ndev = pci_get_drvdata(pdev); 2848cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 28499a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (nvme_dev_resume(ndev) && !work_busy(&ndev->reset_work)) { 28509ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo ndev->reset_workfn = nvme_reset_failed_dev; 28519a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch queue_work(nvme_workq, &ndev->reset_work); 28529a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 28539a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return 0; 2854cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch} 2855671a6018db1d359254c8201704cf967efb42fc25Jingoo Han#endif 2856cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2857cd63894630ab17a192bf97427d16dbec10710a6aKeith Buschstatic SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume); 2858b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 28591d3520357df99baf4ad89f86268ac96cd38092d9Stephen Hemmingerstatic const struct pci_error_handlers nvme_err_handler = { 2860b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .error_detected = nvme_error_detected, 2861b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .mmio_enabled = nvme_dump_registers, 2862b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .link_reset = nvme_link_reset, 2863b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .slot_reset = nvme_slot_reset, 2864b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_error_resume, 2865b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2866b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2867b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* Move to pci_ids.h later */ 2868b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define PCI_CLASS_STORAGE_EXPRESS 0x010802 2869b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 28706eb0d698efa9c2a35ec3ca958699717c603f85eeMatthew Wilcoxstatic const struct pci_device_id nvme_id_table[] = { 2871b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 2872b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { 0, } 2873b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2874b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_DEVICE_TABLE(pci, nvme_id_table); 2875b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2876b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct pci_driver nvme_driver = { 2877b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .name = "nvme", 2878b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .id_table = nvme_id_table, 2879b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .probe = nvme_probe, 28808d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartman .remove = nvme_remove, 288109ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch .shutdown = nvme_shutdown, 2882cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch .driver = { 2883cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch .pm = &nvme_dev_pm_ops, 2884cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch }, 2885b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .err_handler = &nvme_err_handler, 2886b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2887b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2888b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __init nvme_init(void) 2889b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 28900ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox int result; 28911fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 2892b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran init_waitqueue_head(&nvme_kthread_wait); 2893b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 28949a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_workq = create_singlethread_workqueue("nvme"); 28959a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (!nvme_workq) 2896b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran return -ENOMEM; 28979a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 28985c42ea1643a630060f9e71e06d3933d244970967Keith Busch result = register_blkdev(nvme_major, "nvme"); 28995c42ea1643a630060f9e71e06d3933d244970967Keith Busch if (result < 0) 29009a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch goto kill_workq; 29015c42ea1643a630060f9e71e06d3933d244970967Keith Busch else if (result > 0) 29020ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox nvme_major = result; 2903b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2904b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = pci_register_driver(&nvme_driver); 29051fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (result) 29061fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto unregister_blkdev; 29071fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 2908b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 29091fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox unregister_blkdev: 2910b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 29119a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kill_workq: 29129a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch destroy_workqueue(nvme_workq); 2913b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 2914b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2915b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2916b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __exit nvme_exit(void) 2917b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2918b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_unregister_driver(&nvme_driver); 2919b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 29209a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch destroy_workqueue(nvme_workq); 2921b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran BUG_ON(nvme_thread && !IS_ERR(nvme_thread)); 292221bd78bcf4208e84deab0d34f9d4e034d0580d0cMatthew Wilcox _nvme_check_size(); 2923b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2924b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2925b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 2926b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_LICENSE("GPL"); 29276eb0d698efa9c2a35ec3ca958699717c603f85eeMatthew WilcoxMODULE_VERSION("0.9"); 2928b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_init(nvme_init); 2929b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_exit(nvme_exit); 2930