nvme-core.c revision 27e8166c31656f7780e682eaf6bc9c3b8dd03253
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 45b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define NVME_Q_DEPTH 1024 46b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) 47b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) 48e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox#define ADMIN_TIMEOUT (60 * HZ) 49edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch#define IOD_TIMEOUT (4 * NVME_IO_TIMEOUT) 50b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 51b355084a891985d4cd0ca23b1a83366af2c4232dKeith Buschunsigned char io_timeout = 30; 52b355084a891985d4cd0ca23b1a83366af2c4232dKeith Buschmodule_param(io_timeout, byte, 0644); 53b355084a891985d4cd0ca23b1a83366af2c4232dKeith BuschMODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O"); 54b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 55b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_major; 56b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_param(nvme_major, int, 0); 57b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic int use_threaded_interrupts; 5958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxmodule_param(use_threaded_interrupts, int, 0); 6058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 611fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic DEFINE_SPINLOCK(dev_list_lock); 621fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic LIST_HEAD(dev_list); 631fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic struct task_struct *nvme_thread; 649a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic struct workqueue_struct *nvme_workq; 65b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeranstatic wait_queue_head_t nvme_kthread_wait; 661fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 67d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Buschstatic void nvme_reset_failed_dev(struct work_struct *ws); 68d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch 694d115420707afcabe77d2535e092356df6664b70Keith Buschstruct async_cmd_info { 704d115420707afcabe77d2535e092356df6664b70Keith Busch struct kthread_work work; 714d115420707afcabe77d2535e092356df6664b70Keith Busch struct kthread_worker *worker; 724d115420707afcabe77d2535e092356df6664b70Keith Busch u32 result; 734d115420707afcabe77d2535e092356df6664b70Keith Busch int status; 744d115420707afcabe77d2535e092356df6664b70Keith Busch void *ctx; 754d115420707afcabe77d2535e092356df6664b70Keith Busch}; 761fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 77b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 78b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * An NVM Express queue. Each device has at least two (one for admin 79b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * commands and one for I/O commands). 80b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 81b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstruct nvme_queue { 825a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct rcu_head r_head; 83b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *q_dmadev; 84091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct nvme_dev *dev; 853193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox char irqname[24]; /* nvme4294967295-65535\0 */ 86b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spinlock_t q_lock; 87b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command *sq_cmds; 88b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox volatile struct nvme_completion *cqes; 89b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t sq_dma_addr; 90b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t cq_dma_addr; 91b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_queue_head_t sq_full; 921fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox wait_queue_t sq_cong_wait; 93b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio_list sq_cong; 94edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct list_head iod_bio; 95b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 __iomem *q_db; 96b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 q_depth; 97b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_vector; 98b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_head; 99b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_tail; 100b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_head; 101c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch u16 qid; 102e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox u8 cq_phase; 103e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox u8 cqe_seen; 104224042742582c9938788b81165180c876e997a07Keith Busch u8 q_suspended; 10542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_var_t cpu_mask; 1064d115420707afcabe77d2535e092356df6664b70Keith Busch struct async_cmd_info cmdinfo; 107b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long cmdid_data[]; 108b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 109b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 110b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 111b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Check we didin't inadvertently grow the command struct 112b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 113b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic inline void _nvme_check_size(void) 114b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 115b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); 116b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); 117b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); 118b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); 119b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_features) != 64); 120f8ebf8409abfdaeeb8c847381629a2a8b8e3d816Vishal Verma BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); 121c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); 122b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_command) != 64); 123b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); 124b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); 125b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); 1266ecec74520d8a357726e6c12f99080dbe7b347ddKeith Busch BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); 127b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 128b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 129edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschtypedef void (*nvme_completion_fn)(struct nvme_queue *, void *, 130c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *); 131c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 132e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstruct nvme_cmd_info { 133c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 134c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 135e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox unsigned long timeout; 136c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch int aborted; 137e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox}; 138e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 139e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstatic struct nvme_cmd_info *nvme_cmd_info(struct nvme_queue *nvmeq) 140e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox{ 141e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return (void *)&nvmeq->cmdid_data[BITS_TO_LONGS(nvmeq->q_depth)]; 142e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox} 143e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 144224042742582c9938788b81165180c876e997a07Keith Buschstatic unsigned nvme_queue_extra(int depth) 145224042742582c9938788b81165180c876e997a07Keith Busch{ 146224042742582c9938788b81165180c876e997a07Keith Busch return DIV_ROUND_UP(depth, 8) + (depth * sizeof(struct nvme_cmd_info)); 147224042742582c9938788b81165180c876e997a07Keith Busch} 148224042742582c9938788b81165180c876e997a07Keith Busch 149b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 150714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * alloc_cmdid() - Allocate a Command ID 151714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @nvmeq: The queue that will be used for this command 152714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @ctx: A pointer that will be passed to the handler 153c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox * @handler: The function to call on completion 154b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 155b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Allocate a Command ID for a queue. The data passed in will 156b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * be passed to the completion handler. This is implemented by using 157b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the bottom two bits of the ctx pointer to store the handler ID. 158b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Passing in a pointer that's not 4-byte aligned will cause a BUG. 159b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * We can change this if it becomes a problem. 160184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * 161184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * May be called with local interrupts disabled and the q_lock held, 162184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * or with interrupts enabled and no locks held. 163b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 164c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic int alloc_cmdid(struct nvme_queue *nvmeq, void *ctx, 165c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 166b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 167e6d15f79f997a98b3a69abbc462fc9041cc1a7b4Matthew Wilcox int depth = nvmeq->q_depth - 1; 168e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 169b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 170b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 171b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox do { 172b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdid = find_first_zero_bit(nvmeq->cmdid_data, depth); 173b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid >= depth) 174b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EBUSY; 175b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } while (test_and_set_bit(cmdid, nvmeq->cmdid_data)); 176b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 177c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = handler; 178c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].ctx = ctx; 179e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].timeout = jiffies + timeout; 180c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch info[cmdid].aborted = 0; 181b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 182b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 183b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 184b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int alloc_cmdid_killable(struct nvme_queue *nvmeq, void *ctx, 185c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 186b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 187b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 188b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_event_killable(nvmeq->sq_full, 189e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox (cmdid = alloc_cmdid(nvmeq, ctx, handler, timeout)) >= 0); 190b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return (cmdid < 0) ? -EINTR : cmdid; 191b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 192b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 193c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox/* Special values must be less than 0x1000 */ 194c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox#define CMD_CTX_BASE ((void *)POISON_POINTER_DELTA) 195d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_CANCELLED (0x30C + CMD_CTX_BASE) 196d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_COMPLETED (0x310 + CMD_CTX_BASE) 197d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_INVALID (0x314 + CMD_CTX_BASE) 19800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox#define CMD_CTX_FLUSH (0x318 + CMD_CTX_BASE) 199c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch#define CMD_CTX_ABORT (0x31C + CMD_CTX_BASE) 200be7b62754e097adc0cb16c25c9ee86ee20de62fbMatthew Wilcox 201edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschstatic void special_completion(struct nvme_queue *nvmeq, void *ctx, 202c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 203c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 204c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_CANCELLED) 205c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 206c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_FLUSH) 207c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 208c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (ctx == CMD_CTX_ABORT) { 209edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch ++nvmeq->dev->abort_limit; 210c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 211c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch } 212c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_COMPLETED) { 213edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch dev_warn(nvmeq->q_dmadev, 214c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "completed id %d twice on queue %d\n", 215c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 216c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 217c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 218c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_INVALID) { 219edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch dev_warn(nvmeq->q_dmadev, 220c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "invalid id %d completed on queue %d\n", 221c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 222c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 223c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 224c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 225edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch dev_warn(nvmeq->q_dmadev, "Unknown special completion %p\n", ctx); 226c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 227c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 228edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschstatic void async_completion(struct nvme_queue *nvmeq, void *ctx, 2294d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_completion *cqe) 2304d115420707afcabe77d2535e092356df6664b70Keith Busch{ 2314d115420707afcabe77d2535e092356df6664b70Keith Busch struct async_cmd_info *cmdinfo = ctx; 2324d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo->result = le32_to_cpup(&cqe->result); 2334d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 2344d115420707afcabe77d2535e092356df6664b70Keith Busch queue_kthread_work(cmdinfo->worker, &cmdinfo->work); 2354d115420707afcabe77d2535e092356df6664b70Keith Busch} 2364d115420707afcabe77d2535e092356df6664b70Keith Busch 237184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 238184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 239184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 240c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *free_cmdid(struct nvme_queue *nvmeq, int cmdid, 241c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 242b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 243c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 244e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 245b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 246c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (cmdid >= nvmeq->q_depth) { 247c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = special_completion; 24848e3d39816416b3bf03dee3a796c0c04427c1a31Matthew Wilcox return CMD_CTX_INVALID; 249c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 250859361a228258edf4821d9f5635825033eca78e8Keith Busch if (fn) 251859361a228258edf4821d9f5635825033eca78e8Keith Busch *fn = info[cmdid].fn; 252c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 253c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 254e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_COMPLETED; 255b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox clear_bit(cmdid, nvmeq->cmdid_data); 256b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wake_up(&nvmeq->sq_full); 257c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 258b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 259b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 260c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *cancel_cmdid(struct nvme_queue *nvmeq, int cmdid, 261c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 2623c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 263c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 264e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 265c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (fn) 266c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = info[cmdid].fn; 267c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 268c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 269e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_CANCELLED; 270c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 2713c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 2723c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 2735a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Buschstatic struct nvme_queue *raw_nvmeq(struct nvme_dev *dev, int qid) 274b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2755a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch return rcu_dereference_raw(dev->queues[qid]); 276b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 277b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2784f5099af4f3d5f999d8ab7784472d93e810e3912Keith Buschstatic struct nvme_queue *get_nvmeq(struct nvme_dev *dev) __acquires(RCU) 2795a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch{ 28042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch unsigned queue_id = get_cpu_var(*dev->io_queue); 2815a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_read_lock(); 28242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch return rcu_dereference(dev->queues[queue_id]); 2835a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch} 2845a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch 2854f5099af4f3d5f999d8ab7784472d93e810e3912Keith Buschstatic void put_nvmeq(struct nvme_queue *nvmeq) __releases(RCU) 286b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2875a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_read_unlock(); 28842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch put_cpu_var(nvmeq->dev->io_queue); 289b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 290b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2914f5099af4f3d5f999d8ab7784472d93e810e3912Keith Buschstatic struct nvme_queue *lock_nvmeq(struct nvme_dev *dev, int q_idx) 2924f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch __acquires(RCU) 293b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2944f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch rcu_read_lock(); 2954f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch return rcu_dereference(dev->queues[q_idx]); 2964f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch} 2974f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch 2984f5099af4f3d5f999d8ab7784472d93e810e3912Keith Buschstatic void unlock_nvmeq(struct nvme_queue *nvmeq) __releases(RCU) 2994f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch{ 3004f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch rcu_read_unlock(); 301b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 302b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 303b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 304714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * nvme_submit_cmd() - Copy a command into a queue and ring the doorbell 305b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @nvmeq: The queue to use 306b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @cmd: The command to send 307b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 308b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Safe to use from interrupt context 309b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 310b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) 311b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 312b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long flags; 313b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 tail; 314b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_irqsave(&nvmeq->q_lock, flags); 3154f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch if (nvmeq->q_suspended) { 3164f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch spin_unlock_irqrestore(&nvmeq->q_lock, flags); 3174f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch return -EBUSY; 3184f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch } 319b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = nvmeq->sq_tail; 320b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); 321b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++tail == nvmeq->q_depth) 322b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = 0; 3237547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(tail, nvmeq->q_db); 324b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = tail; 325b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_unlock_irqrestore(&nvmeq->q_lock, flags); 326b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 327b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 328b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 329b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 330eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic __le64 **iod_list(struct nvme_iod *iod) 331e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews{ 332eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ((void *)iod) + iod->offset; 333e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews} 334e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 335eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox/* 336eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * Will slightly overestimate the number of pages needed. This is OK 337eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * as it only leads to a small amount of wasted memory for the lifetime of 338eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * the I/O. 339eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox */ 340eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_npages(unsigned size) 341eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox{ 342eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned nprps = DIV_ROUND_UP(size + PAGE_SIZE, PAGE_SIZE); 343eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); 344eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox} 345b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 346eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic struct nvme_iod * 347eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxnvme_alloc_iod(unsigned nseg, unsigned nbytes, gfp_t gfp) 348b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 349eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + 350eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(__le64 *) * nvme_npages(nbytes) + 351eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(struct scatterlist) * nseg, gfp); 352eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 353eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod) { 354eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->offset = offsetof(struct nvme_iod, sg[nseg]); 355eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 356eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->length = nbytes; 3572b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch iod->nents = 0; 358edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch iod->first_dma = 0ULL; 3596198221fa0df0298513b35796f63f242ea97134eKeith Busch iod->start_time = jiffies; 360eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 361eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 362eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 363b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 364b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3655d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) 366b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 367eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox const int last_prp = PAGE_SIZE / 8 - 1; 368eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int i; 369eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 370eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t prp_dma = iod->first_dma; 371eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 372eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod->npages == 0) 373eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_small_pool, list[0], prp_dma); 374eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox for (i = 0; i < iod->npages; i++) { 375eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 *prp_list = list[i]; 376eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); 377eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); 378eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox prp_dma = next_prp_dma; 379eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 380eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 381b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 382b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3836198221fa0df0298513b35796f63f242ea97134eKeith Buschstatic void nvme_start_io_acct(struct bio *bio) 3846198221fa0df0298513b35796f63f242ea97134eKeith Busch{ 3856198221fa0df0298513b35796f63f242ea97134eKeith Busch struct gendisk *disk = bio->bi_bdev->bd_disk; 3866198221fa0df0298513b35796f63f242ea97134eKeith Busch const int rw = bio_data_dir(bio); 3876198221fa0df0298513b35796f63f242ea97134eKeith Busch int cpu = part_stat_lock(); 3886198221fa0df0298513b35796f63f242ea97134eKeith Busch part_round_stats(cpu, &disk->part0); 3896198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_inc(cpu, &disk->part0, ios[rw]); 3906198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_add(cpu, &disk->part0, sectors[rw], bio_sectors(bio)); 3916198221fa0df0298513b35796f63f242ea97134eKeith Busch part_inc_in_flight(&disk->part0, rw); 3926198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_unlock(); 3936198221fa0df0298513b35796f63f242ea97134eKeith Busch} 3946198221fa0df0298513b35796f63f242ea97134eKeith Busch 3956198221fa0df0298513b35796f63f242ea97134eKeith Buschstatic void nvme_end_io_acct(struct bio *bio, unsigned long start_time) 3966198221fa0df0298513b35796f63f242ea97134eKeith Busch{ 3976198221fa0df0298513b35796f63f242ea97134eKeith Busch struct gendisk *disk = bio->bi_bdev->bd_disk; 3986198221fa0df0298513b35796f63f242ea97134eKeith Busch const int rw = bio_data_dir(bio); 3996198221fa0df0298513b35796f63f242ea97134eKeith Busch unsigned long duration = jiffies - start_time; 4006198221fa0df0298513b35796f63f242ea97134eKeith Busch int cpu = part_stat_lock(); 4016198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_add(cpu, &disk->part0, ticks[rw], duration); 4026198221fa0df0298513b35796f63f242ea97134eKeith Busch part_round_stats(cpu, &disk->part0); 4036198221fa0df0298513b35796f63f242ea97134eKeith Busch part_dec_in_flight(&disk->part0, rw); 4046198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_unlock(); 4056198221fa0df0298513b35796f63f242ea97134eKeith Busch} 4066198221fa0df0298513b35796f63f242ea97134eKeith Busch 407edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschstatic void bio_completion(struct nvme_queue *nvmeq, void *ctx, 408b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion *cqe) 409b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 410eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = ctx; 411eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct bio *bio = iod->private; 412b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 status = le16_to_cpup(&cqe->status) >> 1; 413b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 414edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (unlikely(status)) { 415edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!(status & NVME_SC_DNR || 416edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch bio->bi_rw & REQ_FAILFAST_MASK) && 417edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch (jiffies - iod->start_time) < IOD_TIMEOUT) { 418edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!waitqueue_active(&nvmeq->sq_full)) 419edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch add_wait_queue(&nvmeq->sq_full, 420edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch &nvmeq->sq_cong_wait); 421edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch list_add_tail(&iod->node, &nvmeq->iod_bio); 422edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch wake_up(&nvmeq->sq_full); 423edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch return; 424edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 425edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 4269e59d091b0eb04f223ed037348e3d9e36f30e72bKeith Busch if (iod->nents) { 427edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch dma_unmap_sg(nvmeq->q_dmadev, iod->sg, iod->nents, 428b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_data_dir(bio) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 4299e59d091b0eb04f223ed037348e3d9e36f30e72bKeith Busch nvme_end_io_acct(bio, iod->start_time); 4309e59d091b0eb04f223ed037348e3d9e36f30e72bKeith Busch } 431edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch nvme_free_iod(nvmeq->dev, iod); 432427e97080196548557b288517537ab7eb48c309fKeith Busch if (status) 4331ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, -EIO); 434427e97080196548557b288517537ab7eb48c309fKeith Busch else 4351ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, 0); 436b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 437b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 438184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* length is in bytes. gfp flags indicates whether we may sleep. */ 439edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschint nvme_setup_prps(struct nvme_dev *dev, struct nvme_iod *iod, int total_len, 440edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch gfp_t gfp) 441ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox{ 44299802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox struct dma_pool *pool; 443eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int length = total_len; 444eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct scatterlist *sg = iod->sg; 445ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int dma_len = sg_dma_len(sg); 446ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox u64 dma_addr = sg_dma_address(sg); 447ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int offset = offset_in_page(dma_addr); 448e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *prp_list; 449eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 450e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr_t prp_dma; 451eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int nprps, i; 452ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 453ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox length -= (PAGE_SIZE - offset); 454ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= 0) 455eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 456ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 457ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len -= (PAGE_SIZE - offset); 458ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (dma_len) { 459ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr += (PAGE_SIZE - offset); 460ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } else { 461ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox sg = sg_next(sg); 462ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr = sg_dma_address(sg); 463ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len = sg_dma_len(sg); 464ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 465ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 466ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= PAGE_SIZE) { 467edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch iod->first_dma = dma_addr; 468eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 469e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 470e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 471e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews nprps = DIV_ROUND_UP(length, PAGE_SIZE); 47299802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (nprps <= (256 / 8)) { 47399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_small_pool; 474eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 0; 47599802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } else { 47699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_page_pool; 477eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 1; 47899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 47999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 480b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 481b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (!prp_list) { 482edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch iod->first_dma = dma_addr; 483eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 484eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return (total_len - length) + PAGE_SIZE; 485b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox } 486eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[0] = prp_list; 487eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->first_dma = prp_dma; 488e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews i = 0; 489e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews for (;;) { 4907523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox if (i == PAGE_SIZE / 8) { 491e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *old_prp_list = prp_list; 492b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 493eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!prp_list) 494eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len - length; 495eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[iod->npages++] = prp_list; 4967523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox prp_list[0] = old_prp_list[i - 1]; 4977523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox old_prp_list[i - 1] = cpu_to_le64(prp_dma); 4987523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox i = 1; 499e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 500e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews prp_list[i++] = cpu_to_le64(dma_addr); 501e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len -= PAGE_SIZE; 502e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr += PAGE_SIZE; 503e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews length -= PAGE_SIZE; 504e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (length <= 0) 505e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews break; 506e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (dma_len > 0) 507e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews continue; 508e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews BUG_ON(dma_len < 0); 509e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews sg = sg_next(sg); 510e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr = sg_dma_address(sg); 511e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len = sg_dma_len(sg); 512ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 513ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 514eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 515ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox} 516ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 517427e97080196548557b288517537ab7eb48c309fKeith Buschstatic int nvme_split_and_submit(struct bio *bio, struct nvme_queue *nvmeq, 51820d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet int len) 519427e97080196548557b288517537ab7eb48c309fKeith Busch{ 52020d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet struct bio *split = bio_split(bio, len >> 9, GFP_ATOMIC, NULL); 52120d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet if (!split) 522427e97080196548557b288517537ab7eb48c309fKeith Busch return -ENOMEM; 523427e97080196548557b288517537ab7eb48c309fKeith Busch 52420d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet bio_chain(split, bio); 52520d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet 526edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!waitqueue_active(&nvmeq->sq_full)) 527427e97080196548557b288517537ab7eb48c309fKeith Busch add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 52820d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet bio_list_add(&nvmeq->sq_cong, split); 52920d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet bio_list_add(&nvmeq->sq_cong, bio); 530edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch wake_up(&nvmeq->sq_full); 531427e97080196548557b288517537ab7eb48c309fKeith Busch 532427e97080196548557b288517537ab7eb48c309fKeith Busch return 0; 533427e97080196548557b288517537ab7eb48c309fKeith Busch} 534427e97080196548557b288517537ab7eb48c309fKeith Busch 5351ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox/* NVMe scatterlists require no holes in the virtual address */ 5361ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox#define BIOVEC_NOT_VIRT_MERGEABLE(vec1, vec2) ((vec2)->bv_offset || \ 5371ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox (((vec1)->bv_offset + (vec1)->bv_len) % PAGE_SIZE)) 5381ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox 539427e97080196548557b288517537ab7eb48c309fKeith Buschstatic int nvme_map_bio(struct nvme_queue *nvmeq, struct nvme_iod *iod, 540b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio, enum dma_data_direction dma_dir, int psegs) 541b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 5427988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet struct bio_vec bvec, bvprv; 5437988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet struct bvec_iter iter; 544768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct scatterlist *sg = NULL; 5457988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet int length = 0, nsegs = 0, split_len = bio->bi_iter.bi_size; 5467988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet int first = 1; 547159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch 548159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (nvmeq->dev->stripe_size) 549159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch split_len = nvmeq->dev->stripe_size - 5504f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet ((bio->bi_iter.bi_sector << 9) & 5514f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet (nvmeq->dev->stripe_size - 1)); 552b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 553eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg_init_table(iod->sg, psegs); 5547988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet bio_for_each_segment(bvec, bio, iter) { 5557988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet if (!first && BIOVEC_PHYS_MERGEABLE(&bvprv, &bvec)) { 5567988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet sg->length += bvec.bv_len; 557768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } else { 5587988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet if (!first && BIOVEC_NOT_VIRT_MERGEABLE(&bvprv, &bvec)) 5597988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet return nvme_split_and_submit(bio, nvmeq, 56020d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet length); 561427e97080196548557b288517537ab7eb48c309fKeith Busch 562eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = sg ? sg + 1 : iod->sg; 5637988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet sg_set_page(sg, bvec.bv_page, 5647988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet bvec.bv_len, bvec.bv_offset); 565768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox nsegs++; 566768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } 567159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch 5687988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet if (split_len - length < bvec.bv_len) 56920d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet return nvme_split_and_submit(bio, nvmeq, split_len); 5707988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet length += bvec.bv_len; 571768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvprv = bvec; 5727988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet first = 0; 573b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 574eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->nents = nsegs; 575768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_mark_end(sg); 576427e97080196548557b288517537ab7eb48c309fKeith Busch if (dma_map_sg(nvmeq->q_dmadev, iod->sg, iod->nents, dma_dir) == 0) 5771ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return -ENOMEM; 578427e97080196548557b288517537ab7eb48c309fKeith Busch 5794f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet BUG_ON(length != bio->bi_iter.bi_size); 5801ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return length; 581b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 582b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5830e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic int nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, 5840e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct bio *bio, struct nvme_iod *iod, int cmdid) 5850e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 586edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct nvme_dsm_range *range = 587edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch (struct nvme_dsm_range *)iod_list(iod)[0]; 5880e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 5890e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5900e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->cattr = cpu_to_le32(0); 5914f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet range->nlb = cpu_to_le32(bio->bi_iter.bi_size >> ns->lba_shift); 5924f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet range->slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_iter.bi_sector)); 5930e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5940e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch memset(cmnd, 0, sizeof(*cmnd)); 5950e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.opcode = nvme_cmd_dsm; 5960e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.command_id = cmdid; 5970e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); 5980e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.prp1 = cpu_to_le64(iod->first_dma); 5990e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nr = 0; 6000e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); 6010e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6020e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (++nvmeq->sq_tail == nvmeq->q_depth) 6030e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvmeq->sq_tail = 0; 6040e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch writel(nvmeq->sq_tail, nvmeq->q_db); 6050e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6060e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return 0; 6070e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 6080e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 60900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcoxstatic int nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, 61000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid) 61100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 61200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 61300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 61400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 61500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.opcode = nvme_cmd_flush; 61600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.command_id = cmdid; 61700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.nsid = cpu_to_le32(ns->ns_id); 61800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 61900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 62000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox nvmeq->sq_tail = 0; 62100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 62200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 62300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return 0; 62400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 62500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 6265d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns) 62700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 62800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid = alloc_cmdid(nvmeq, (void *)CMD_CTX_FLUSH, 629ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox special_completion, NVME_IO_TIMEOUT); 63000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (unlikely(cmdid < 0)) 63100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return cmdid; 63200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 63300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 63400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 63500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 636edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschstatic int nvme_submit_iod(struct nvme_queue *nvmeq, struct nvme_iod *iod) 637b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 638edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct bio *bio = iod->private; 639edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data; 640ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox struct nvme_command *cmnd; 641edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch int cmdid; 642b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 control; 643b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 dsmgmt; 64400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 645ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox cmdid = alloc_cmdid(nvmeq, iod, bio_completion, NVME_IO_TIMEOUT); 646b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (unlikely(cmdid < 0)) 647edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch return cmdid; 648b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 649edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (bio->bi_rw & REQ_DISCARD) 650edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch return nvme_submit_discard(nvmeq, ns, bio, iod, cmdid); 651edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if ((bio->bi_rw & REQ_FLUSH) && !iod->nents) 65200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 65300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 654b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control = 0; 655b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_FUA) 656b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_FUA; 657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & (REQ_FAILFAST_DEV | REQ_RAHEAD)) 658b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_LR; 659b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 660b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt = 0; 661b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_RAHEAD) 662b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; 663b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 664ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 665b8deb62cf271fa9381edc8cf52bcae2f0225c55aMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 666b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 667edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch cmnd->rw.opcode = bio_data_dir(bio) ? nvme_cmd_write : nvme_cmd_read; 668ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.command_id = cmdid; 669ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.nsid = cpu_to_le32(ns->ns_id); 670edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch cmnd->rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); 671edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch cmnd->rw.prp2 = cpu_to_le64(iod->first_dma); 6724f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_iter.bi_sector)); 673edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch cmnd->rw.length = 674edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch cpu_to_le16((bio->bi_iter.bi_size >> ns->lba_shift) - 1); 675ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.control = cpu_to_le16(control); 676ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); 677b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 678b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 679b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = 0; 6807547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 681b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6821974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox return 0; 683edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch} 684edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch 685edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch/* 686edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch * Called with local interrupts disabled and the q_lock held. May not sleep. 687edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch */ 688edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschstatic int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns, 689edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct bio *bio) 690edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch{ 691edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct nvme_iod *iod; 692edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch int psegs = bio_phys_segments(ns->queue, bio); 693edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch int result; 694edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch 695edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if ((bio->bi_rw & REQ_FLUSH) && psegs) { 696edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch result = nvme_submit_flush_data(nvmeq, ns); 697edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (result) 698edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch return result; 699edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 700edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch 701edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch iod = nvme_alloc_iod(psegs, bio->bi_iter.bi_size, GFP_ATOMIC); 702edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!iod) 703edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch return -ENOMEM; 704edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch 705edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch iod->private = bio; 706edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (bio->bi_rw & REQ_DISCARD) { 707edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch void *range; 708edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch /* 709edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch * We reuse the small pool to allocate the 16-byte range here 710edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch * as it is not worth having a special pool for these or 711edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch * additional cases to handle freeing the iod. 712edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch */ 713edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch range = dma_pool_alloc(nvmeq->dev->prp_small_pool, 714edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch GFP_ATOMIC, 715edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch &iod->first_dma); 716edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!range) { 717edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch result = -ENOMEM; 718edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch goto free_iod; 719edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 720edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch iod_list(iod)[0] = (__le64 *)range; 721edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch iod->npages = 0; 722edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } else if (psegs) { 723edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch result = nvme_map_bio(nvmeq, iod, bio, 724edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch bio_data_dir(bio) ? DMA_TO_DEVICE : DMA_FROM_DEVICE, 725edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch psegs); 726edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (result <= 0) 727edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch goto free_iod; 728edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (nvme_setup_prps(nvmeq->dev, iod, result, GFP_ATOMIC) != 729edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch result) { 730edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch result = -ENOMEM; 731edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch goto free_iod; 732edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 733edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch nvme_start_io_acct(bio); 734edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 735edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (unlikely(nvme_submit_iod(nvmeq, iod))) { 736edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!waitqueue_active(&nvmeq->sq_full)) 737edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 738edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch list_add_tail(&iod->node, &nvmeq->iod_bio); 739edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 740edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch return 0; 7411974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox 742eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 743eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(nvmeq->dev, iod); 744eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox return result; 745b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 746b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 747e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcoxstatic int nvme_process_cq(struct nvme_queue *nvmeq) 748b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 749821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 head, phase; 750b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 751b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = nvmeq->cq_head; 752821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = nvmeq->cq_phase; 753b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 754b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (;;) { 755c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 756c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 757b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion cqe = nvmeq->cqes[head]; 758821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != phase) 759b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox break; 760b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++head == nvmeq->q_depth) { 762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = 0; 763821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = !phase; 764b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 765b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 766c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = free_cmdid(nvmeq, cqe.command_id, &fn); 767edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch fn(nvmeq, ctx, &cqe); 768b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 769b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 770b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* If the controller ignores the cq head doorbell and continuously 771b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * writes to the queue, it is theoretically possible to wrap around 772b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the queue twice and mistakenly return IRQ_NONE. Linux only 773b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * requires that 0.1% of your interrupts are handled, so this isn't 774b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * a big problem. 775b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 776821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 777e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox return 0; 778b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 779b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu writel(head, nvmeq->q_db + nvmeq->dev->db_stride); 780b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = head; 781821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = phase; 782b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 783e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvmeq->cqe_seen = 1; 784e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox return 1; 785b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 786b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7877d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcoxstatic void nvme_make_request(struct request_queue *q, struct bio *bio) 7887d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox{ 7897d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox struct nvme_ns *ns = q->queuedata; 7907d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(ns->dev); 7917d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox int result = -EBUSY; 7927d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 793cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch if (!nvmeq) { 794cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch put_nvmeq(NULL); 795cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch bio_endio(bio, -EIO); 796cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return; 797cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch } 798cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 7997d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 800224042742582c9938788b81165180c876e997a07Keith Busch if (!nvmeq->q_suspended && bio_list_empty(&nvmeq->sq_cong)) 8017d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox result = nvme_submit_bio_queue(nvmeq, ns, bio); 8027d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox if (unlikely(result)) { 803edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!waitqueue_active(&nvmeq->sq_full)) 8047d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 8057d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 8067d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox } 8077d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 8087d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox nvme_process_cq(nvmeq); 8097d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 8107d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox put_nvmeq(nvmeq); 8117d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox} 8127d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 813b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_irq(int irq, void *data) 814b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 81558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox irqreturn_t result; 81658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 81758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_lock(&nvmeq->q_lock); 818e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvme_process_cq(nvmeq); 819e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; 820e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvmeq->cqe_seen = 0; 82158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_unlock(&nvmeq->q_lock); 82258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return result; 82358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 82458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 82558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic irqreturn_t nvme_irq_check(int irq, void *data) 82658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox{ 82758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 82858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 82958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 83058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_NONE; 83158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_WAKE_THREAD; 83258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 83358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 8343c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic void nvme_abort_command(struct nvme_queue *nvmeq, int cmdid) 8353c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 8363c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 837c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cancel_cmdid(nvmeq, cmdid, NULL); 8383c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 8393c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 8403c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 841c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstruct sync_cmd_info { 842c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct task_struct *task; 843c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox u32 result; 844c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox int status; 845c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox}; 846c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 847edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschstatic void sync_completion(struct nvme_queue *nvmeq, void *ctx, 848c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 849c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 850c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct sync_cmd_info *cmdinfo = ctx; 851c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->result = le32_to_cpup(&cqe->result); 852c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 853c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox wake_up_process(cmdinfo->task); 854c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 855c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 856b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 857b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Returns 0 on success. If the result is negative, it's a Linux error code; 858b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * if the result is positive, it's an NVM Express status code 859b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 8604f5099af4f3d5f999d8ab7784472d93e810e3912Keith Buschstatic int nvme_submit_sync_cmd(struct nvme_dev *dev, int q_idx, 8614f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch struct nvme_command *cmd, 8625d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma u32 *result, unsigned timeout) 863b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 8644f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch int cmdid, ret; 865b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct sync_cmd_info cmdinfo; 8664f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch struct nvme_queue *nvmeq; 8674f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch 8684f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch nvmeq = lock_nvmeq(dev, q_idx); 8694f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch if (!nvmeq) { 8704f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch unlock_nvmeq(nvmeq); 8714f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch return -ENODEV; 8724f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch } 873b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 874b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.task = current; 875b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.status = -EINTR; 876b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8774f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch cmdid = alloc_cmdid(nvmeq, &cmdinfo, sync_completion, timeout); 8784f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch if (cmdid < 0) { 8794f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch unlock_nvmeq(nvmeq); 880b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 8814f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch } 882b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmd->common.command_id = cmdid; 883b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8843c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox set_current_state(TASK_KILLABLE); 8854f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch ret = nvme_submit_cmd(nvmeq, cmd); 8864f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch if (ret) { 8874f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch free_cmdid(nvmeq, cmdid, NULL); 8884f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch unlock_nvmeq(nvmeq); 8894f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch set_current_state(TASK_RUNNING); 8904f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch return ret; 8914f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch } 8924f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch unlock_nvmeq(nvmeq); 89378f8d2577bd79ce9d62f4d9e6d3b895bd1dd1d1dKeith Busch schedule_timeout(timeout); 894b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8953c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox if (cmdinfo.status == -EINTR) { 8964f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch nvmeq = lock_nvmeq(dev, q_idx); 8974f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch if (nvmeq) 8984f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch nvme_abort_command(nvmeq, cmdid); 8994f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch unlock_nvmeq(nvmeq); 9003c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox return -EINTR; 9013c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox } 9023c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 903b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 904b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox *result = cmdinfo.result; 905b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 906b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdinfo.status; 907b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 908b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9094d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_submit_async_cmd(struct nvme_queue *nvmeq, 9104d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_command *cmd, 9114d115420707afcabe77d2535e092356df6664b70Keith Busch struct async_cmd_info *cmdinfo, unsigned timeout) 9124d115420707afcabe77d2535e092356df6664b70Keith Busch{ 9134d115420707afcabe77d2535e092356df6664b70Keith Busch int cmdid; 9144d115420707afcabe77d2535e092356df6664b70Keith Busch 9154d115420707afcabe77d2535e092356df6664b70Keith Busch cmdid = alloc_cmdid_killable(nvmeq, cmdinfo, async_completion, timeout); 9164d115420707afcabe77d2535e092356df6664b70Keith Busch if (cmdid < 0) 9174d115420707afcabe77d2535e092356df6664b70Keith Busch return cmdid; 9184d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo->status = -EINTR; 9194d115420707afcabe77d2535e092356df6664b70Keith Busch cmd->common.command_id = cmdid; 9204f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch return nvme_submit_cmd(nvmeq, cmd); 9214d115420707afcabe77d2535e092356df6664b70Keith Busch} 9224d115420707afcabe77d2535e092356df6664b70Keith Busch 9235d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, 924b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 *result) 925b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 9264f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch return nvme_submit_sync_cmd(dev, 0, cmd, result, ADMIN_TIMEOUT); 9274f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch} 9284f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch 9294f5099af4f3d5f999d8ab7784472d93e810e3912Keith Buschint nvme_submit_io_cmd(struct nvme_dev *dev, struct nvme_command *cmd, 9304f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch u32 *result) 9314f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch{ 9324f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch return nvme_submit_sync_cmd(dev, smp_processor_id() + 1, cmd, result, 9334f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch NVME_IO_TIMEOUT); 934b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 935b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9364d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_submit_admin_cmd_async(struct nvme_dev *dev, 9374d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_command *cmd, struct async_cmd_info *cmdinfo) 9384d115420707afcabe77d2535e092356df6664b70Keith Busch{ 9395a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch return nvme_submit_async_cmd(raw_nvmeq(dev, 0), cmd, cmdinfo, 9404d115420707afcabe77d2535e092356df6664b70Keith Busch ADMIN_TIMEOUT); 9414d115420707afcabe77d2535e092356df6664b70Keith Busch} 9424d115420707afcabe77d2535e092356df6664b70Keith Busch 943b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 944b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 945b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 946b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 947b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 948b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 949b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.opcode = opcode; 950b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.qid = cpu_to_le16(id); 951b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 952b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 953b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 954b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 955b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 956b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 957b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 958b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 959b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 960b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 961b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 962b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 963b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 964b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 965b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 966b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.opcode = nvme_admin_create_cq; 967b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 968b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cqid = cpu_to_le16(qid); 969b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 970b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cq_flags = cpu_to_le16(flags); 971b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 972b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 973b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 974b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 975b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 976b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 977b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 978b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 979b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 980b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 981b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 982b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 983b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 984b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 985b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 986b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 987b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.opcode = nvme_admin_create_sq; 988b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 989b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sqid = cpu_to_le16(qid); 990b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 991b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sq_flags = cpu_to_le16(flags); 992b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.cqid = cpu_to_le16(qid); 993b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 994b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 995b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 996b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 997b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 998b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 999b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1000b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 1001b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1002b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 1003b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1004b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1005b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 1006b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1007b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 1008b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1009b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10105d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns, 1011bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox dma_addr_t dma_addr) 1012bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 1013bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 1014bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 1015bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 1016bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.opcode = nvme_admin_identify; 1017bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.nsid = cpu_to_le32(nsid); 1018bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.prp1 = cpu_to_le64(dma_addr); 1019bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.cns = cpu_to_le32(cns); 1020bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 1021bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, NULL); 1022bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 1023bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 10245d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid, 102508df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr_t dma_addr, u32 *result) 1026bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 1027bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 1028bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 1029bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 1030bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.opcode = nvme_admin_get_features; 1031a42ceccef0c43b46ff6bc1b12a7c1076ef243df1Keith Busch c.features.nsid = cpu_to_le32(nsid); 1032bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 1033bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.fid = cpu_to_le32(fid); 1034bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 103508df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch return nvme_submit_admin_cmd(dev, &c, result); 1036df3481399042200792822b6243e36a95a557b57eMatthew Wilcox} 1037df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 10385d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11, 10395d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma dma_addr_t dma_addr, u32 *result) 1040df3481399042200792822b6243e36a95a557b57eMatthew Wilcox{ 1041df3481399042200792822b6243e36a95a557b57eMatthew Wilcox struct nvme_command c; 1042df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 1043df3481399042200792822b6243e36a95a557b57eMatthew Wilcox memset(&c, 0, sizeof(c)); 1044df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.opcode = nvme_admin_set_features; 1045df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 1046df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.fid = cpu_to_le32(fid); 1047df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.dword11 = cpu_to_le32(dword11); 1048df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 1049bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, result); 1050bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 1051bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 1052a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox/** 1053c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * nvme_abort_cmd - Attempt aborting a command 1054c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * @cmdid: Command id of a timed out IO 1055c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * @queue: The queue with timed out IO 1056c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * 1057c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * Schedule controller reset if the command was already aborted once before and 1058c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * still hasn't been returned to the driver, or if this is the admin queue. 1059c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch */ 1060c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Buschstatic void nvme_abort_cmd(int cmdid, struct nvme_queue *nvmeq) 1061c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch{ 1062c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch int a_cmdid; 1063c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch struct nvme_command cmd; 1064c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch struct nvme_dev *dev = nvmeq->dev; 1065c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 10665a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *adminq; 1067c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1068c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (!nvmeq->qid || info[cmdid].aborted) { 1069c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (work_busy(&dev->reset_work)) 1070c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1071c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch list_del_init(&dev->node); 1072c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev_warn(&dev->pci_dev->dev, 1073c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch "I/O %d QID %d timeout, reset controller\n", cmdid, 1074c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid); 10759ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo dev->reset_workfn = nvme_reset_failed_dev; 1076c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch queue_work(nvme_workq, &dev->reset_work); 1077c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1078c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch } 1079c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1080c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (!dev->abort_limit) 1081c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1082c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 10835a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch adminq = rcu_dereference(dev->queues[0]); 10845a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch a_cmdid = alloc_cmdid(adminq, CMD_CTX_ABORT, special_completion, 1085c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch ADMIN_TIMEOUT); 1086c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (a_cmdid < 0) 1087c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1088c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1089c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch memset(&cmd, 0, sizeof(cmd)); 1090c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.opcode = nvme_admin_abort_cmd; 1091c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.cid = cmdid; 1092c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.sqid = cpu_to_le16(nvmeq->qid); 1093c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.command_id = a_cmdid; 1094c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1095c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch --dev->abort_limit; 1096c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch info[cmdid].aborted = 1; 1097c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch info[cmdid].timeout = jiffies + ADMIN_TIMEOUT; 1098c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1099c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev_warn(nvmeq->q_dmadev, "Aborting I/O %d QID %d\n", cmdid, 1100c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid); 11015a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch nvme_submit_cmd(adminq, &cmd); 1102c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch} 1103c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1104c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch/** 1105a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * nvme_cancel_ios - Cancel outstanding I/Os 1106a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @queue: The queue to cancel I/Os on 1107a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @timeout: True to only cancel I/Os which have timed out 1108a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox */ 1109a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcoxstatic void nvme_cancel_ios(struct nvme_queue *nvmeq, bool timeout) 1110a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox{ 1111a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int depth = nvmeq->q_depth - 1; 1112a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 1113a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox unsigned long now = jiffies; 1114a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int cmdid; 1115a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1116a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox for_each_set_bit(cmdid, nvmeq->cmdid_data, depth) { 1117a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox void *ctx; 1118a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_completion_fn fn; 1119a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox static struct nvme_completion cqe = { 1120af2d9ca744af5e03390eeb3864d08ce75c860899Matthew Wilcox .status = cpu_to_le16(NVME_SC_ABORT_REQ << 1), 1121a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox }; 1122a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1123a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox if (timeout && !time_after(now, info[cmdid].timeout)) 1124a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox continue; 1125053ab702cc2702f25a97ead087ed344b864785b7Keith Busch if (info[cmdid].ctx == CMD_CTX_CANCELLED) 1126053ab702cc2702f25a97ead087ed344b864785b7Keith Busch continue; 1127c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (timeout && nvmeq->dev->initialized) { 1128c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvme_abort_cmd(cmdid, nvmeq); 1129c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch continue; 1130c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch } 1131c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d QID %d\n", cmdid, 1132c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid); 1133a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox ctx = cancel_cmdid(nvmeq, cmdid, &fn); 1134edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch fn(nvmeq, ctx, &cqe); 1135a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox } 1136a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox} 1137a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 11385a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Buschstatic void nvme_free_queue(struct rcu_head *r) 11399e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox{ 11405a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *nvmeq = container_of(r, struct nvme_queue, r_head); 11415a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch 1142224042742582c9938788b81165180c876e997a07Keith Busch spin_lock_irq(&nvmeq->q_lock); 1143224042742582c9938788b81165180c876e997a07Keith Busch while (bio_list_peek(&nvmeq->sq_cong)) { 1144224042742582c9938788b81165180c876e997a07Keith Busch struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 1145224042742582c9938788b81165180c876e997a07Keith Busch bio_endio(bio, -EIO); 1146224042742582c9938788b81165180c876e997a07Keith Busch } 1147edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch while (!list_empty(&nvmeq->iod_bio)) { 1148edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch static struct nvme_completion cqe = { 1149edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch .status = cpu_to_le16( 1150edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch (NVME_SC_ABORT_REQ | NVME_SC_DNR) << 1), 1151edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch }; 1152edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct nvme_iod *iod = list_first_entry(&nvmeq->iod_bio, 1153edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct nvme_iod, 1154edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch node); 1155edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch list_del(&iod->node); 1156edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch bio_completion(nvmeq, iod, &cqe); 1157edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 1158224042742582c9938788b81165180c876e997a07Keith Busch spin_unlock_irq(&nvmeq->q_lock); 1159224042742582c9938788b81165180c876e997a07Keith Busch 11609e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 11619e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 11629e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 11639e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 116442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (nvmeq->qid) 116542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch free_cpumask_var(nvmeq->cpu_mask); 11669e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox kfree(nvmeq); 11679e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox} 11689e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 1169a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Buschstatic void nvme_free_queues(struct nvme_dev *dev, int lowest) 1170224042742582c9938788b81165180c876e997a07Keith Busch{ 1171224042742582c9938788b81165180c876e997a07Keith Busch int i; 1172224042742582c9938788b81165180c876e997a07Keith Busch 1173a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch for (i = dev->queue_count - 1; i >= lowest; i--) { 11745a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *nvmeq = raw_nvmeq(dev, i); 11755a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_assign_pointer(dev->queues[i], NULL); 11765a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch call_rcu(&nvmeq->r_head, nvme_free_queue); 1177224042742582c9938788b81165180c876e997a07Keith Busch dev->queue_count--; 1178224042742582c9938788b81165180c876e997a07Keith Busch } 1179224042742582c9938788b81165180c876e997a07Keith Busch} 1180224042742582c9938788b81165180c876e997a07Keith Busch 11814d115420707afcabe77d2535e092356df6664b70Keith Busch/** 11824d115420707afcabe77d2535e092356df6664b70Keith Busch * nvme_suspend_queue - put queue into suspended state 11834d115420707afcabe77d2535e092356df6664b70Keith Busch * @nvmeq - queue to suspend 11844d115420707afcabe77d2535e092356df6664b70Keith Busch * 11854d115420707afcabe77d2535e092356df6664b70Keith Busch * Returns 1 if already suspended, 0 otherwise. 11864d115420707afcabe77d2535e092356df6664b70Keith Busch */ 11874d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_suspend_queue(struct nvme_queue *nvmeq) 1188b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 11894d115420707afcabe77d2535e092356df6664b70Keith Busch int vector = nvmeq->dev->entry[nvmeq->cq_vector].vector; 1190b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1191a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1192224042742582c9938788b81165180c876e997a07Keith Busch if (nvmeq->q_suspended) { 1193224042742582c9938788b81165180c876e997a07Keith Busch spin_unlock_irq(&nvmeq->q_lock); 11944d115420707afcabe77d2535e092356df6664b70Keith Busch return 1; 11953295874b6074d749516d6decd43afad7bf6e38ffKeith Busch } 1196224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->q_suspended = 1; 119742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq->dev->online_queues--; 1198a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1199a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1200aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox irq_set_affinity_hint(vector, NULL); 1201aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox free_irq(vector, nvmeq); 1202b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12034d115420707afcabe77d2535e092356df6664b70Keith Busch return 0; 12044d115420707afcabe77d2535e092356df6664b70Keith Busch} 1205b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12064d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_clear_queue(struct nvme_queue *nvmeq) 12074d115420707afcabe77d2535e092356df6664b70Keith Busch{ 1208224042742582c9938788b81165180c876e997a07Keith Busch spin_lock_irq(&nvmeq->q_lock); 1209224042742582c9938788b81165180c876e997a07Keith Busch nvme_process_cq(nvmeq); 1210224042742582c9938788b81165180c876e997a07Keith Busch nvme_cancel_ios(nvmeq, false); 1211224042742582c9938788b81165180c876e997a07Keith Busch spin_unlock_irq(&nvmeq->q_lock); 1212b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1213b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12144d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_disable_queue(struct nvme_dev *dev, int qid) 12154d115420707afcabe77d2535e092356df6664b70Keith Busch{ 12165a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *nvmeq = raw_nvmeq(dev, qid); 12174d115420707afcabe77d2535e092356df6664b70Keith Busch 12184d115420707afcabe77d2535e092356df6664b70Keith Busch if (!nvmeq) 12194d115420707afcabe77d2535e092356df6664b70Keith Busch return; 12204d115420707afcabe77d2535e092356df6664b70Keith Busch if (nvme_suspend_queue(nvmeq)) 12214d115420707afcabe77d2535e092356df6664b70Keith Busch return; 12224d115420707afcabe77d2535e092356df6664b70Keith Busch 12230e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch /* Don't tell the adapter to delete the admin queue. 12240e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch * Don't tell a removed adapter to delete IO queues. */ 12250e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch if (qid && readl(&dev->bar->csts) != -1) { 1226b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1227b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1228b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 12294d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_clear_queue(nvmeq); 1230b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1231b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1232b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 1233b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int depth, int vector) 1234b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1235b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1236224042742582c9938788b81165180c876e997a07Keith Busch unsigned extra = nvme_queue_extra(depth); 1237b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq) + extra, GFP_KERNEL); 1238b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq) 1239b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1240b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1241b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cqes = dma_alloc_coherent(dmadev, CQ_SIZE(depth), 1242b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->cq_dma_addr, GFP_KERNEL); 1243b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->cqes) 1244b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 1245b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset((void *)nvmeq->cqes, 0, CQ_SIZE(depth)); 1246b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1247b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds = dma_alloc_coherent(dmadev, SQ_SIZE(depth), 1248b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->sq_dma_addr, GFP_KERNEL); 1249b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->sq_cmds) 1250b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_cqdma; 1251b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 125242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (qid && !zalloc_cpumask_var(&nvmeq->cpu_mask, GFP_KERNEL)) 125342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch goto free_sqdma; 125442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 1255b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_dmadev = dmadev; 1256091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvmeq->dev = dev; 12573193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox snprintf(nvmeq->irqname, sizeof(nvmeq->irqname), "nvme%dq%d", 12583193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox dev->instance, qid); 1259b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_init(&nvmeq->q_lock); 1260b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = 0; 1261821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = 1; 1262b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox init_waitqueue_head(&nvmeq->sq_full); 12631fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox init_waitqueue_entry(&nvmeq->sq_cong_wait, nvme_thread); 1264b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_init(&nvmeq->sq_cong); 1265edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch INIT_LIST_HEAD(&nvmeq->iod_bio); 1266b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 1267b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_depth = depth; 1268b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_vector = vector; 1269c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid = qid; 1270224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->q_suspended = 1; 1271224042742582c9938788b81165180c876e997a07Keith Busch dev->queue_count++; 12725a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_assign_pointer(dev->queues[qid], nvmeq); 1273b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1274b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 1275b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 127642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch free_sqdma: 127742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dma_free_coherent(dmadev, SQ_SIZE(depth), (void *)nvmeq->sq_cmds, 127842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq->sq_dma_addr); 1279b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_cqdma: 128068b8eca5f882230e4991df0db0a3094f49420a90Keith Busch dma_free_coherent(dmadev, CQ_SIZE(depth), (void *)nvmeq->cqes, 1281b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_dma_addr); 1282b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 1283b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 1284b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1285b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1286b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12873001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcoxstatic int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 12883001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox const char *name) 12893001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox{ 129058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if (use_threaded_interrupts) 129158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 1292481e5bad84239b01415b888df2040c1860ae3cfdMichael Opdenacker nvme_irq_check, nvme_irq, IRQF_SHARED, 129358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox name, nvmeq); 12943001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 1295481e5bad84239b01415b888df2040c1860ae3cfdMichael Opdenacker IRQF_SHARED, name, nvmeq); 12963001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox} 12973001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox 1298224042742582c9938788b81165180c876e997a07Keith Buschstatic void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) 1299b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1300224042742582c9938788b81165180c876e997a07Keith Busch struct nvme_dev *dev = nvmeq->dev; 1301224042742582c9938788b81165180c876e997a07Keith Busch unsigned extra = nvme_queue_extra(nvmeq->q_depth); 1302b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1303224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->sq_tail = 0; 1304224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->cq_head = 0; 1305224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->cq_phase = 1; 1306b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 1307224042742582c9938788b81165180c876e997a07Keith Busch memset(nvmeq->cmdid_data, 0, extra); 1308224042742582c9938788b81165180c876e997a07Keith Busch memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); 1309224042742582c9938788b81165180c876e997a07Keith Busch nvme_cancel_ios(nvmeq, false); 1310224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->q_suspended = 0; 131142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dev->online_queues++; 1312224042742582c9938788b81165180c876e997a07Keith Busch} 1313224042742582c9938788b81165180c876e997a07Keith Busch 1314224042742582c9938788b81165180c876e997a07Keith Buschstatic int nvme_create_queue(struct nvme_queue *nvmeq, int qid) 1315224042742582c9938788b81165180c876e997a07Keith Busch{ 1316224042742582c9938788b81165180c876e997a07Keith Busch struct nvme_dev *dev = nvmeq->dev; 1317224042742582c9938788b81165180c876e997a07Keith Busch int result; 13183f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox 1319b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_cq(dev, qid, nvmeq); 1320b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1321224042742582c9938788b81165180c876e997a07Keith Busch return result; 1322b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1323b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_sq(dev, qid, nvmeq); 1324b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1325b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_cq; 1326b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 13273193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox result = queue_request_irq(dev, nvmeq, nvmeq->irqname); 1328b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1329b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_sq; 1330b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 13310a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1332224042742582c9938788b81165180c876e997a07Keith Busch nvme_init_queue(nvmeq, qid); 13330a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1334224042742582c9938788b81165180c876e997a07Keith Busch 1335224042742582c9938788b81165180c876e997a07Keith Busch return result; 1336b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1337b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_sq: 1338b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1339b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_cq: 1340b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1341224042742582c9938788b81165180c876e997a07Keith Busch return result; 1342b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1343b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1344ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_wait_ready(struct nvme_dev *dev, u64 cap, bool enabled) 1345ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 1346ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox unsigned long timeout; 1347ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox u32 bit = enabled ? NVME_CSTS_RDY : 0; 1348ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1349ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; 1350ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1351ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox while ((readl(&dev->bar->csts) & NVME_CSTS_RDY) != bit) { 1352ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox msleep(100); 1353ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (fatal_signal_pending(current)) 1354ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return -EINTR; 1355ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (time_after(jiffies, timeout)) { 1356ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox dev_err(&dev->pci_dev->dev, 135727e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox "Device not ready; aborting %s\n", enabled ? 135827e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox "initialisation" : "reset"); 1359ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return -ENODEV; 1360ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox } 1361ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox } 1362ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1363ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return 0; 1364ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1365ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1366ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox/* 1367ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * If the device has been passed off to us in an enabled state, just clear 1368ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * the enabled bit. The spec says we should set the 'shutdown notification 1369ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * bits', but doing so may cause the device to complete commands to the 1370ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * admin queue ... and we don't know what memory that might be pointing at! 1371ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox */ 1372ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_disable_ctrl(struct nvme_dev *dev, u64 cap) 1373ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 137444af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox u32 cc = readl(&dev->bar->cc); 137544af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox 137644af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox if (cc & NVME_CC_ENABLE) 137744af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox writel(cc & ~NVME_CC_ENABLE, &dev->bar->cc); 1378ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return nvme_wait_ready(dev, cap, false); 1379ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1380ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1381ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap) 1382ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 1383ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return nvme_wait_ready(dev, cap, true); 1384ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1385ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 13861894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Buschstatic int nvme_shutdown_ctrl(struct nvme_dev *dev) 13871894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch{ 13881894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch unsigned long timeout; 13891894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch u32 cc; 13901894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 13911894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch cc = (readl(&dev->bar->cc) & ~NVME_CC_SHN_MASK) | NVME_CC_SHN_NORMAL; 13921894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch writel(cc, &dev->bar->cc); 13931894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 13941894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch timeout = 2 * HZ + jiffies; 13951894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch while ((readl(&dev->bar->csts) & NVME_CSTS_SHST_MASK) != 13961894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch NVME_CSTS_SHST_CMPLT) { 13971894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch msleep(100); 13981894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch if (fatal_signal_pending(current)) 13991894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch return -EINTR; 14001894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch if (time_after(jiffies, timeout)) { 14011894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch dev_err(&dev->pci_dev->dev, 14021894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch "Device shutdown incomplete; abort shutdown\n"); 14031894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch return -ENODEV; 14041894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch } 14051894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch } 14061894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 14071894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch return 0; 14081894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch} 14091894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 14108d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_configure_admin_queue(struct nvme_dev *dev) 1411b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1412ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox int result; 1413b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 aqa; 1414ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox u64 cap = readq(&dev->bar->cap); 1415b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq; 1416b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1417ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox result = nvme_disable_ctrl(dev, cap); 1418ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (result < 0) 1419ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return result; 1420b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14215a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch nvmeq = raw_nvmeq(dev, 0); 1422cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch if (!nvmeq) { 1423cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvmeq = nvme_alloc_queue(dev, 0, 64, 0); 1424cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch if (!nvmeq) 1425cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return -ENOMEM; 1426cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch } 1427b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1428b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa = nvmeq->q_depth - 1; 1429b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa |= aqa << 16; 1430b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1431b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config = NVME_CC_ENABLE | NVME_CC_CSS_NVM; 1432b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= (PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; 1433b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; 14347f53f9d2424533256ae86f7df5661a17de743de8Matthew Wilcox dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; 1435b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1436b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(aqa, &dev->bar->aqa); 1437b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->sq_dma_addr, &dev->bar->asq); 1438b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->cq_dma_addr, &dev->bar->acq); 1439b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(dev->ctrl_config, &dev->bar->cc); 1440b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1441ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox result = nvme_enable_ctrl(dev, cap); 1442025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1443cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return result; 14449e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 14453193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox result = queue_request_irq(dev, nvmeq, nvmeq->irqname); 1446025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1447cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return result; 1448025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch 14490a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1450224042742582c9938788b81165180c876e997a07Keith Busch nvme_init_queue(nvmeq, 0); 14510a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1452b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1453b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1454b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14555d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermastruct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, 1456eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned long addr, unsigned length) 1457b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 145836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox int i, err, count, nents, offset; 14597fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct scatterlist *sg; 14607fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct page **pages; 1461eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 146236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 146336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (addr & 3) 1464eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 14655460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter if (!length || length > INT_MAX - PAGE_SIZE) 1466eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 14677fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 146836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox offset = offset_in_page(addr); 14697fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox count = DIV_ROUND_UP(offset + length, PAGE_SIZE); 14707fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox pages = kcalloc(count, sizeof(*pages), GFP_KERNEL); 147122fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter if (!pages) 147222fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter return ERR_PTR(-ENOMEM); 147336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 147436c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = get_user_pages_fast(addr, count, 1, pages); 147536c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (err < count) { 147636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox count = err; 147736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = -EFAULT; 147836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox goto put_pages; 147936c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox } 14807fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 1481eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(count, length, GFP_KERNEL); 1482eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = iod->sg; 148336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox sg_init_table(sg, count); 1484d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox for (i = 0; i < count; i++) { 1485d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox sg_set_page(&sg[i], pages[i], 14865460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter min_t(unsigned, length, PAGE_SIZE - offset), 14875460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter offset); 1488d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox length -= (PAGE_SIZE - offset); 1489d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox offset = 0; 14907fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox } 1491fe304c43c6d63e29ed4fc46a874d7a74313788c5Matthew Wilcox sg_mark_end(&sg[i - 1]); 14921c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox iod->nents = count; 14937fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 14947fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox err = -ENOMEM; 14957fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox nents = dma_map_sg(&dev->pci_dev->dev, sg, count, 14967fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 149736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (!nents) 1498eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 1499b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15007fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1501eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 1502b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1503eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 1504eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 15057fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_pages: 15067fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox for (i = 0; i < count; i++) 15077fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_page(pages[i]); 15087fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1509eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(err); 15107fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1511b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15125d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_unmap_user_pages(struct nvme_dev *dev, int write, 15131c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox struct nvme_iod *iod) 15147fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox{ 15151c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox int i; 1516b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15171c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 15181c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 15197fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 15201c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox for (i = 0; i < iod->nents; i++) 15211c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox put_page(sg_page(&iod->sg[i])); 15227fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1523b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1524a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcoxstatic int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) 1525a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox{ 1526a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_dev *dev = ns->dev; 1527a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_user_io io; 1528a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_command c; 1529f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch unsigned length, meta_len; 1530f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int status, i; 1531f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch struct nvme_iod *iod, *meta_iod = NULL; 1532f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch dma_addr_t meta_dma_addr; 1533f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch void *meta, *uninitialized_var(meta_mem); 1534a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1535a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox if (copy_from_user(&io, uio, sizeof(io))) 1536a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return -EFAULT; 15376c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox length = (io.nblocks + 1) << ns->lba_shift; 1538f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_len = (io.nblocks + 1) * ns->ms; 1539f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1540f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len && ((io.metadata & 3) || !io.metadata)) 1541f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch return -EINVAL; 15426c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 15436c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox switch (io.opcode) { 15446c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_write: 15456c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_read: 15466bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case nvme_cmd_compare: 1547eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_map_user_pages(dev, io.opcode & 1, io.addr, length); 15486413214c5d424fd5aae6567848340f962ad2ce0fMatthew Wilcox break; 15496c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox default: 15506bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EINVAL; 15516c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox } 15526c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 1553eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1554eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1555a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1556a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox memset(&c, 0, sizeof(c)); 1557a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.opcode = io.opcode; 1558a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.flags = io.flags; 15596c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.nsid = cpu_to_le32(ns->ns_id); 1560a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.slba = cpu_to_le64(io.slba); 15616c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.length = cpu_to_le16(io.nblocks); 1562a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.control = cpu_to_le16(io.control); 15631c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); 15641c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.reftag = cpu_to_le32(io.reftag); 15651c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.apptag = cpu_to_le16(io.apptag); 15661c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.appmask = cpu_to_le16(io.appmask); 1567f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1568f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len) { 15691b56749e541ad59068582f2a28297843e243b856Keith Busch meta_iod = nvme_map_user_pages(dev, io.opcode & 1, io.metadata, 15701b56749e541ad59068582f2a28297843e243b856Keith Busch meta_len); 1571f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (IS_ERR(meta_iod)) { 1572f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch status = PTR_ERR(meta_iod); 1573f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod = NULL; 1574f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch goto unmap; 1575f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1576f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1577f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_mem = dma_alloc_coherent(&dev->pci_dev->dev, meta_len, 1578f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch &meta_dma_addr, GFP_KERNEL); 1579f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (!meta_mem) { 1580f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch status = -ENOMEM; 1581f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch goto unmap; 1582f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1583f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1584f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (io.opcode & 1) { 1585f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int meta_offset = 0; 1586f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1587f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch for (i = 0; i < meta_iod->nents; i++) { 1588f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + 1589f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].offset; 1590f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch memcpy(meta_mem + meta_offset, meta, 1591f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].length); 1592f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch kunmap_atomic(meta); 1593f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_offset += meta_iod->sg[i].length; 1594f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1595f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1596f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1597f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch c.rw.metadata = cpu_to_le64(meta_dma_addr); 1598f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1599f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1600edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch length = nvme_setup_prps(dev, iod, length, GFP_KERNEL); 1601edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch c.rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); 1602edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch c.rw.prp2 = cpu_to_le64(iod->first_dma); 1603a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1604b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (length != (io.nblocks + 1) << ns->lba_shift) 1605b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1606b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 16074f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch status = nvme_submit_io_cmd(dev, &c, NULL); 1608a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1609f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len) { 1610f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (status == NVME_SC_SUCCESS && !(io.opcode & 1)) { 1611f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int meta_offset = 0; 1612f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1613f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch for (i = 0; i < meta_iod->nents; i++) { 1614f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + 1615f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].offset; 1616f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch memcpy(meta, meta_mem + meta_offset, 1617f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].length); 1618f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch kunmap_atomic(meta); 1619f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_offset += meta_iod->sg[i].length; 1620f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1621f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1622f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1623f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch dma_free_coherent(&dev->pci_dev->dev, meta_len, meta_mem, 1624f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_dma_addr); 1625f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1626f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1627f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch unmap: 16281c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, io.opcode & 1, iod); 1629eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 1630f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1631f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_iod) { 1632f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch nvme_unmap_user_pages(dev, io.opcode & 1, meta_iod); 1633f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch nvme_free_iod(dev, meta_iod); 1634f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1635f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1636a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return status; 1637a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox} 1638a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 163950af8baec46a99a9b81a4600c0374f83a5a590a9Keith Buschstatic int nvme_user_admin_cmd(struct nvme_dev *dev, 16406bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd __user *ucmd) 16416ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox{ 16426bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd cmd; 16436ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox struct nvme_command c; 1644eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status, length; 1645c7d36ab8fa04c213328119a9c0d66985fe204ee5Keith Busch struct nvme_iod *uninitialized_var(iod); 164694f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch unsigned timeout; 16476ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 16486bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (!capable(CAP_SYS_ADMIN)) 16496bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EACCES; 16506bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (copy_from_user(&cmd, ucmd, sizeof(cmd))) 16516ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return -EFAULT; 16526ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 16536ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox memset(&c, 0, sizeof(c)); 16546bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.opcode = cmd.opcode; 16556bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.flags = cmd.flags; 16566bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.nsid = cpu_to_le32(cmd.nsid); 16576bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); 16586bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); 16596bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); 16606bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); 16616bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); 16626bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); 16636bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); 16646bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); 16656bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 16666bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox length = cmd.data_len; 16676bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 1668497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox iod = nvme_map_user_pages(dev, cmd.opcode & 1, cmd.addr, 1669497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox length); 1670eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1671eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1672edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch length = nvme_setup_prps(dev, iod, length, GFP_KERNEL); 1673edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch c.common.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); 1674edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch c.common.prp2 = cpu_to_le64(iod->first_dma); 16756bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 16766bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 167794f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch timeout = cmd.timeout_ms ? msecs_to_jiffies(cmd.timeout_ms) : 167894f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch ADMIN_TIMEOUT; 16796bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (length != cmd.data_len) 1680b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1681b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 16824f5099af4f3d5f999d8ab7784472d93e810e3912Keith Busch status = nvme_submit_sync_cmd(dev, 0, &c, &cmd.result, timeout); 1683eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 16846bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 16851c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, cmd.opcode & 1, iod); 1686eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 16876bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 1688f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 1689cf90bc4830b858487fe4b9b9ecd0031e23ca3e83Chayan Biswas if ((status >= 0) && copy_to_user(&ucmd->result, &cmd.result, 1690f4f117f64baf8840d22266d518227b2a186d294bKeith Busch sizeof(cmd.result))) 1691f4f117f64baf8840d22266d518227b2a186d294bKeith Busch status = -EFAULT; 1692f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 16936ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return status; 16946ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox} 16956ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 1696b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 1697b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long arg) 1698b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1699b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = bdev->bd_disk->private_data; 1700b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1701b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox switch (cmd) { 17026bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ID: 1703c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox force_successful_syscall_return(); 17046bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return ns->ns_id; 17056bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ADMIN_CMD: 170650af8baec46a99a9b81a4600c0374f83a5a590a9Keith Busch return nvme_user_admin_cmd(ns->dev, (void __user *)arg); 1707a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox case NVME_IOCTL_SUBMIT_IO: 1708a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return nvme_submit_io(ns, (void __user *)arg); 17095d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_GET_VERSION_NUM: 17105d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_get_version_num((void __user *)arg); 17115d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_IO: 17125d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_io(ns, (void __user *)arg); 1713b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox default: 1714b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOTTY; 1715b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1716b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1717b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1718320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#ifdef CONFIG_COMPAT 1719320a382746e0ab1304476ea7e986a8d416ab99dbKeith Buschstatic int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, 1720320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch unsigned int cmd, unsigned long arg) 1721320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch{ 1722320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch struct nvme_ns *ns = bdev->bd_disk->private_data; 1723320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch 1724320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch switch (cmd) { 1725320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch case SG_IO: 1726320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch return nvme_sg_io32(ns, arg); 1727320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch } 1728320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch return nvme_ioctl(bdev, mode, cmd, arg); 1729320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch} 1730320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#else 1731320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#define nvme_compat_ioctl NULL 1732320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#endif 1733320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch 17349ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Buschstatic int nvme_open(struct block_device *bdev, fmode_t mode) 17359ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch{ 17369ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_ns *ns = bdev->bd_disk->private_data; 17379ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_dev *dev = ns->dev; 17389ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 17399ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch kref_get(&dev->kref); 17409ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch return 0; 17419ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch} 17429ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 17439ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Buschstatic void nvme_free_dev(struct kref *kref); 17449ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 17459ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Buschstatic void nvme_release(struct gendisk *disk, fmode_t mode) 17469ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch{ 17479ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_ns *ns = disk->private_data; 17489ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_dev *dev = ns->dev; 17499ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 17509ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch kref_put(&dev->kref, nvme_free_dev); 17519ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch} 17529ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 17534cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Buschstatic int nvme_getgeo(struct block_device *bd, struct hd_geometry *geo) 17544cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch{ 17554cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch /* some standard values */ 17564cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch geo->heads = 1 << 6; 17574cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch geo->sectors = 1 << 5; 17584cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch geo->cylinders = get_capacity(bd->bd_disk) >> 11; 17594cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch return 0; 17604cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch} 17614cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch 1762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic const struct block_device_operations nvme_fops = { 1763b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .owner = THIS_MODULE, 1764b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .ioctl = nvme_ioctl, 1765320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch .compat_ioctl = nvme_compat_ioctl, 17669ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch .open = nvme_open, 17679ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch .release = nvme_release, 17684cc09e2dc4cbe6009c935b6f12a8376f09124bc5Keith Busch .getgeo = nvme_getgeo, 1769b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1770b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1771edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Buschstatic void nvme_resubmit_iods(struct nvme_queue *nvmeq) 1772edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch{ 1773edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch struct nvme_iod *iod, *next; 1774edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch 1775edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch list_for_each_entry_safe(iod, next, &nvmeq->iod_bio, node) { 1776edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (unlikely(nvme_submit_iod(nvmeq, iod))) 1777edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch break; 1778edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch list_del(&iod->node); 1779edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (bio_list_empty(&nvmeq->sq_cong) && 1780edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch list_empty(&nvmeq->iod_bio)) 1781edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch remove_wait_queue(&nvmeq->sq_full, 1782edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch &nvmeq->sq_cong_wait); 1783edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch } 1784edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch} 1785edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch 17861fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic void nvme_resubmit_bios(struct nvme_queue *nvmeq) 17871fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 17881fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (bio_list_peek(&nvmeq->sq_cong)) { 17891fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 17901fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data; 1791427e97080196548557b288517537ab7eb48c309fKeith Busch 1792edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (bio_list_empty(&nvmeq->sq_cong) && 1793edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch list_empty(&nvmeq->iod_bio)) 1794427e97080196548557b288517537ab7eb48c309fKeith Busch remove_wait_queue(&nvmeq->sq_full, 1795427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 17961fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_submit_bio_queue(nvmeq, ns, bio)) { 1797edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch if (!waitqueue_active(&nvmeq->sq_full)) 1798427e97080196548557b288517537ab7eb48c309fKeith Busch add_wait_queue(&nvmeq->sq_full, 1799427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 18001fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox bio_list_add_head(&nvmeq->sq_cong, bio); 18011fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox break; 18021fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 18031fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 18041fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 18051fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 18061fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic int nvme_kthread(void *data) 18071fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 1808d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch struct nvme_dev *dev, *next; 18091fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 18101fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (!kthread_should_stop()) { 1811564a232c059913d91b491e04c2b2d670b8f94615Arjan van de Ven set_current_state(TASK_INTERRUPTIBLE); 18121fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 1813d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch list_for_each_entry_safe(dev, next, &dev_list, node) { 18141fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox int i; 1815d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch if (readl(&dev->bar->csts) & NVME_CSTS_CFS && 1816d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized) { 1817d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch if (work_busy(&dev->reset_work)) 1818d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch continue; 1819d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch list_del_init(&dev->node); 1820d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev_warn(&dev->pci_dev->dev, 1821d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch "Failed status, reset controller\n"); 18229ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo dev->reset_workfn = nvme_reset_failed_dev; 1823d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch queue_work(nvme_workq, &dev->reset_work); 1824d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch continue; 1825d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch } 18265a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_read_lock(); 18271fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox for (i = 0; i < dev->queue_count; i++) { 18285a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *nvmeq = 18295a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_dereference(dev->queues[i]); 1830740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (!nvmeq) 1831740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox continue; 18321fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1833224042742582c9938788b81165180c876e997a07Keith Busch if (nvmeq->q_suspended) 1834224042742582c9938788b81165180c876e997a07Keith Busch goto unlock; 1835bc57a0f7a44cfcf3e9873f6c6b8dcecdca486b1fMatthew Wilcox nvme_process_cq(nvmeq); 1836a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_cancel_ios(nvmeq, true); 18371fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_resubmit_bios(nvmeq); 1838edd10d33283899fb15d99a290dcc9ceb3604ca78Keith Busch nvme_resubmit_iods(nvmeq); 1839224042742582c9938788b81165180c876e997a07Keith Busch unlock: 18401fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 18411fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 18425a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_read_unlock(); 18431fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 18441fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 1845acb7aa0db09b8abd38abeb84334a8a27a52fbb1bArjan van de Ven schedule_timeout(round_jiffies_relative(HZ)); 18461fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 18471fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 18481fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 18491fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 18500e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic void nvme_config_discard(struct nvme_ns *ns) 18510e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 18520e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch u32 logical_block_size = queue_logical_block_size(ns->queue); 18530e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_zeroes_data = 0; 18540e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_alignment = logical_block_size; 18550e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_granularity = logical_block_size; 18560e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.max_discard_sectors = 0xffffffff; 18570e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); 18580e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 18590e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 1860c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcoxstatic struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid, 1861b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_id_ns *id, struct nvme_lba_range_type *rt) 1862b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1863b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns; 1864b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct gendisk *disk; 1865b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int lbaf; 1866b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1867b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (rt->attributes & NVME_LBART_ATTRIB_HIDE) 1868b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1869b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1870b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns = kzalloc(sizeof(*ns), GFP_KERNEL); 1871b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns) 1872b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1873b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue = blk_alloc_queue(GFP_KERNEL); 1874b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns->queue) 1875b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_ns; 18764eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox ns->queue->queue_flags = QUEUE_FLAG_DEFAULT; 18774eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); 18784eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); 1879b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_queue_make_request(ns->queue, nvme_make_request); 1880b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->dev = dev; 1881b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue->queuedata = ns; 1882b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1883469071a37afc8a627b6b2ddf29db0a097d864845Matthew Wilcox disk = alloc_disk(0); 1884b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!disk) 1885b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_queue; 18865aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ns->ns_id = nsid; 1887b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->disk = disk; 1888b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox lbaf = id->flbas & 0xf; 1889b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->lba_shift = id->lbaf[lbaf].ds; 1890f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); 1891e9ef46369f5107e634a93b7fc4e62a1f53343197Keith Busch blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); 18928fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch if (dev->max_hw_sectors) 18938fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); 1894b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1895b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->major = nvme_major; 1896469071a37afc8a627b6b2ddf29db0a097d864845Matthew Wilcox disk->first_minor = 0; 1897b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->fops = &nvme_fops; 1898b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->private_data = ns; 1899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->queue = ns->queue; 1900388f037f4e7f0a24bac6b1a24f144f5d939f58cfMatthew Wilcox disk->driverfs_dev = &dev->pci_dev->dev; 1901469071a37afc8a627b6b2ddf29db0a097d864845Matthew Wilcox disk->flags = GENHD_FL_EXT_DEVT; 19025aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); 1903b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); 1904b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19050e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (dev->oncs & NVME_CTRL_ONCS_DSM) 19060e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvme_config_discard(ns); 19070e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 1908b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return ns; 1909b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1910b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_queue: 1911b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1912b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_ns: 1913b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1914b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1915b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1916b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 191742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Buschstatic int nvme_find_closest_node(int node) 191842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch{ 191942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch int n, val, min_val = INT_MAX, best_node = node; 192042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 192142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch for_each_online_node(n) { 192242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (n == node) 192342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch continue; 192442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch val = node_distance(node, n); 192542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (val < min_val) { 192642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch min_val = val; 192742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch best_node = n; 192842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch } 192942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch } 193042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch return best_node; 193142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch} 193242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 193342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Buschstatic void nvme_set_queue_cpus(cpumask_t *qmask, struct nvme_queue *nvmeq, 193442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch int count) 193542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch{ 193642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch int cpu; 193742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch for_each_cpu(cpu, qmask) { 193842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (cpumask_weight(nvmeq->cpu_mask) >= count) 193942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch break; 194042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (!cpumask_test_and_set_cpu(cpu, nvmeq->cpu_mask)) 194142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch *per_cpu_ptr(nvmeq->dev->io_queue, cpu) = nvmeq->qid; 194242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch } 194342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch} 194442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 194542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Buschstatic void nvme_add_cpus(cpumask_t *mask, const cpumask_t *unassigned_cpus, 194642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch const cpumask_t *new_mask, struct nvme_queue *nvmeq, int cpus_per_queue) 194742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch{ 194842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch int next_cpu; 194942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch for_each_cpu(next_cpu, new_mask) { 195042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_or(mask, mask, get_cpu_mask(next_cpu)); 195142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_or(mask, mask, topology_thread_cpumask(next_cpu)); 195242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_and(mask, mask, unassigned_cpus); 195342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_set_queue_cpus(mask, nvmeq, cpus_per_queue); 195442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch } 195542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch} 195642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 195742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Buschstatic void nvme_create_io_queues(struct nvme_dev *dev) 195842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch{ 195942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch unsigned i, max; 196042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 196142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch max = min(dev->max_qid, num_online_cpus()); 196242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch for (i = dev->queue_count; i <= max; i++) 196342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (!nvme_alloc_queue(dev, i, dev->q_depth, i - 1)) 196442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch break; 196542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 196642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch max = min(dev->queue_count - 1, num_online_cpus()); 196742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch for (i = dev->online_queues; i <= max; i++) 196842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (nvme_create_queue(raw_nvmeq(dev, i), i)) 196942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch break; 197042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch} 197142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 197242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch/* 197342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch * If there are fewer queues than online cpus, this will try to optimally 197442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch * assign a queue to multiple cpus by grouping cpus that are "close" together: 197542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch * thread siblings, core, socket, closest node, then whatever else is 197642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch * available. 197742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch */ 197842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Buschstatic void nvme_assign_io_queues(struct nvme_dev *dev) 197942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch{ 198042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch unsigned cpu, cpus_per_queue, queues, remainder, i; 198142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_var_t unassigned_cpus; 198242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 198342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_create_io_queues(dev); 198442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 198542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch queues = min(dev->online_queues - 1, num_online_cpus()); 198642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (!queues) 198742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch return; 198842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 198942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpus_per_queue = num_online_cpus() / queues; 199042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch remainder = queues - (num_online_cpus() - queues * cpus_per_queue); 199142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 199242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (!alloc_cpumask_var(&unassigned_cpus, GFP_KERNEL)) 199342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch return; 199442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 199542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_copy(unassigned_cpus, cpu_online_mask); 199642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpu = cpumask_first(unassigned_cpus); 199742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch for (i = 1; i <= queues; i++) { 199842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch struct nvme_queue *nvmeq = lock_nvmeq(dev, i); 199942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_t mask; 200042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 200142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_clear(nvmeq->cpu_mask); 200242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (!cpumask_weight(unassigned_cpus)) { 200342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch unlock_nvmeq(nvmeq); 200442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch break; 200542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch } 200642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 200742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch mask = *get_cpu_mask(cpu); 200842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_set_queue_cpus(&mask, nvmeq, cpus_per_queue); 200942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (cpus_weight(mask) < cpus_per_queue) 201042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_add_cpus(&mask, unassigned_cpus, 201142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch topology_thread_cpumask(cpu), 201242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq, cpus_per_queue); 201342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (cpus_weight(mask) < cpus_per_queue) 201442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_add_cpus(&mask, unassigned_cpus, 201542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch topology_core_cpumask(cpu), 201642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq, cpus_per_queue); 201742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (cpus_weight(mask) < cpus_per_queue) 201842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_add_cpus(&mask, unassigned_cpus, 201942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_of_node(cpu_to_node(cpu)), 202042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq, cpus_per_queue); 202142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (cpus_weight(mask) < cpus_per_queue) 202242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_add_cpus(&mask, unassigned_cpus, 202342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_of_node( 202442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_find_closest_node( 202542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpu_to_node(cpu))), 202642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq, cpus_per_queue); 202742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (cpus_weight(mask) < cpus_per_queue) 202842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_add_cpus(&mask, unassigned_cpus, 202942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch unassigned_cpus, 203042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq, cpus_per_queue); 203142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 203242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch WARN(cpumask_weight(nvmeq->cpu_mask) != cpus_per_queue, 203342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch "nvme%d qid:%d mis-matched queue-to-cpu assignment\n", 203442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dev->instance, i); 203542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 203642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch irq_set_affinity_hint(dev->entry[nvmeq->cq_vector].vector, 203742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq->cpu_mask); 203842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_andnot(unassigned_cpus, unassigned_cpus, 203942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvmeq->cpu_mask); 204042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpu = cpumask_next(cpu, unassigned_cpus); 204142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (remainder && !--remainder) 204242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpus_per_queue++; 204342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch unlock_nvmeq(nvmeq); 204442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch } 204542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch WARN(cpumask_weight(unassigned_cpus), "nvme%d unassigned online cpus\n", 204642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dev->instance); 204742f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch i = 0; 204842f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cpumask_andnot(unassigned_cpus, cpu_possible_mask, cpu_online_mask); 204942f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch for_each_cpu(cpu, unassigned_cpus) 205042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch *per_cpu_ptr(dev->io_queue, cpu) = (i++ % queues) + 1; 205142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch free_cpumask_var(unassigned_cpus); 205242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch} 205342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch 2054b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcoxstatic int set_queue_count(struct nvme_dev *dev, int count) 2055b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2056b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 2057b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 result; 2058b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcox u32 q_count = (count - 1) | ((count - 1) << 16); 2059b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2060df3481399042200792822b6243e36a95a557b57eMatthew Wilcox status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, 2061bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox &result); 206227e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox if (status < 0) 206327e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox return status; 206427e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox if (status > 0) { 206527e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox dev_err(&dev->pci_dev->dev, "Could not set queue count (%d)\n", 206627e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox status); 206727e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox return -EBUSY; 206827e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox } 2069b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return min(result & 0xffff, result >> 16) + 1; 2070b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2071b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 20729d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Buschstatic size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) 20739d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch{ 2074b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu return 4096 + ((nr_io_queues + 1) * 8 * dev->db_stride); 20759d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch} 20769d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch 207733b1e95c90447ea73e37e837ea0268a894919f19Keith Buschstatic int nvme_cpu_notify(struct notifier_block *self, 207833b1e95c90447ea73e37e837ea0268a894919f19Keith Busch unsigned long action, void *hcpu) 207933b1e95c90447ea73e37e837ea0268a894919f19Keith Busch{ 208033b1e95c90447ea73e37e837ea0268a894919f19Keith Busch struct nvme_dev *dev = container_of(self, struct nvme_dev, nb); 208133b1e95c90447ea73e37e837ea0268a894919f19Keith Busch switch (action) { 208233b1e95c90447ea73e37e837ea0268a894919f19Keith Busch case CPU_ONLINE: 208333b1e95c90447ea73e37e837ea0268a894919f19Keith Busch case CPU_DEAD: 208433b1e95c90447ea73e37e837ea0268a894919f19Keith Busch nvme_assign_io_queues(dev); 208533b1e95c90447ea73e37e837ea0268a894919f19Keith Busch break; 208633b1e95c90447ea73e37e837ea0268a894919f19Keith Busch } 208733b1e95c90447ea73e37e837ea0268a894919f19Keith Busch return NOTIFY_OK; 208833b1e95c90447ea73e37e837ea0268a894919f19Keith Busch} 208933b1e95c90447ea73e37e837ea0268a894919f19Keith Busch 20908d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_setup_io_queues(struct nvme_dev *dev) 2091b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 20925a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *adminq = raw_nvmeq(dev, 0); 2093fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula struct pci_dev *pdev = dev->pci_dev; 209442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch int result, i, vecs, nr_io_queues, size; 2095b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 209642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nr_io_queues = num_possible_cpus(); 2097b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = set_queue_count(dev, nr_io_queues); 20981b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result < 0) 20991b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox return result; 2100b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox if (result < nr_io_queues) 2101b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 2102b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 21039d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch size = db_bar_size(dev, nr_io_queues); 21049d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (size > 8192) { 2105f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox iounmap(dev->bar); 21069d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch do { 21079d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch dev->bar = ioremap(pci_resource_start(pdev, 0), size); 21089d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (dev->bar) 21099d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch break; 21109d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (!--nr_io_queues) 21119d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch return -ENOMEM; 21129d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch size = db_bar_size(dev, nr_io_queues); 21139d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch } while (1); 2114f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 21155a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch adminq->q_db = dev->dbs; 2116f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox } 2117f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox 21189d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch /* Deregister the admin queue's interrupt */ 21193193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox free_irq(dev->entry[0].vector, adminq); 21209d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch 2121be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev for (i = 0; i < nr_io_queues; i++) 21221b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->entry[i].entry = i; 2123be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev vecs = pci_enable_msix_range(pdev, dev->entry, 1, nr_io_queues); 2124be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev if (vecs < 0) { 2125be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev vecs = pci_enable_msi_range(pdev, 1, min(nr_io_queues, 32)); 2126be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev if (vecs < 0) { 2127be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev vecs = 1; 2128be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev } else { 2129be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev for (i = 0; i < vecs; i++) 2130be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev dev->entry[i].vector = i + pdev->irq; 2131fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 2132fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 2133fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula 2134063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox /* 2135063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * Should investigate if there's a performance win from allocating 2136063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * more queues than interrupt vectors; it might allow the submission 2137063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * path to scale better, even if the receive path is limited by the 2138063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * number of interrupts. 2139063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox */ 2140063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox nr_io_queues = vecs; 214142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dev->max_qid = nr_io_queues; 2142063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox 21433193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox result = queue_request_irq(dev, adminq, adminq->irqname); 21449d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (result) { 21453193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox adminq->q_suspended = 1; 2146224042742582c9938788b81165180c876e997a07Keith Busch goto free_queues; 21479d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch } 21481b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 2149cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch /* Free previously allocated queues that are no longer usable */ 215042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_free_queues(dev, nr_io_queues + 1); 215142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch nvme_assign_io_queues(dev); 21529ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox 215333b1e95c90447ea73e37e837ea0268a894919f19Keith Busch dev->nb.notifier_call = &nvme_cpu_notify; 215433b1e95c90447ea73e37e837ea0268a894919f19Keith Busch result = register_hotcpu_notifier(&dev->nb); 215533b1e95c90447ea73e37e837ea0268a894919f19Keith Busch if (result) 215633b1e95c90447ea73e37e837ea0268a894919f19Keith Busch goto free_queues; 2157b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2158224042742582c9938788b81165180c876e997a07Keith Busch return 0; 2159b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2160224042742582c9938788b81165180c876e997a07Keith Busch free_queues: 2161a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_free_queues(dev, 1); 2162224042742582c9938788b81165180c876e997a07Keith Busch return result; 2163b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2164b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2165422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox/* 2166422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Return: error value if an error occurred setting up the queues or calling 2167422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Identify Device. 0 if these succeeded, even if adding some of the 2168422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * namespaces failed. At the moment, these failures are silent. TBD which 2169422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * failures should be reported. 2170422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox */ 21718d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_dev_add(struct nvme_dev *dev) 2172b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 217368608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox struct pci_dev *pdev = dev->pci_dev; 2174c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox int res; 2175c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox unsigned nn, i; 2176cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch struct nvme_ns *ns; 217751814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox struct nvme_id_ctrl *ctrl; 2178bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_id_ns *id_ns; 2179bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox void *mem; 2180b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t dma_addr; 2181159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12; 2182b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 218368608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox mem = dma_alloc_coherent(&pdev->dev, 8192, &dma_addr, GFP_KERNEL); 2184a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch if (!mem) 2185a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch return -ENOMEM; 2186b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2187bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, 0, 1, dma_addr); 2188b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) { 218927e8166c31656f7780e682eaf6bc9c3b8dd03253Matthew Wilcox dev_err(&pdev->dev, "Identify Controller failed (%d)\n", res); 2190b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = -EIO; 2191cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch goto out; 2192b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 2193b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2194bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ctrl = mem; 219551814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox nn = le32_to_cpup(&ctrl->nn); 21960e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch dev->oncs = le16_to_cpup(&ctrl->oncs); 2197c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev->abort_limit = ctrl->acl + 1; 219851814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); 219951814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); 220051814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); 2201159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (ctrl->mdts) 22028fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); 220368608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox if ((pdev->vendor == PCI_VENDOR_ID_INTEL) && 220468608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox (pdev->device == 0x0953) && ctrl->vs[3]) 2205159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch dev->stripe_size = 1 << (ctrl->vs[3] + shift); 2206b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2207bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox id_ns = mem; 22082b2c1896871838cdf549442e8ad0264be5fa74e3Matthew Wilcox for (i = 1; i <= nn; i++) { 2209bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, i, 0, dma_addr); 2210b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 2211b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 2212b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2213bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox if (id_ns->ncap == 0) 2214b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 2215b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2216bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_get_features(dev, NVME_FEAT_LBA_RANGE, i, 221708df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr + 4096, NULL); 2218b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 2219122090366d1d5c6ec1bfb6dfdb3a6d121ff074aaKeith Busch memset(mem + 4096, 0, 4096); 2220b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2221bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ns = nvme_alloc_ns(dev, i, mem, mem + 4096); 2222b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (ns) 2223b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_add_tail(&ns->list, &dev->namespaces); 2224b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 2225b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry(ns, &dev->namespaces, list) 2226b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox add_disk(ns->disk); 2227422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox res = 0; 2228b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2229bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox out: 2230684f5c2025b067a23722e620d0b3b858d8dc5d01Matthew Wilcox dma_free_coherent(&dev->pci_dev->dev, 8192, mem, dma_addr); 2231b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 2232b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2233b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 22340877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Buschstatic int nvme_dev_map(struct nvme_dev *dev) 22350877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch{ 223642f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch u64 cap; 22370877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch int bars, result = -ENOMEM; 22380877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch struct pci_dev *pdev = dev->pci_dev; 22390877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 22400877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (pci_enable_device_mem(pdev)) 22410877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch return result; 22420877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 22430877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->entry[0].vector = pdev->irq; 22440877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_set_master(pdev); 22450877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch bars = pci_select_bars(pdev, IORESOURCE_MEM); 22460877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (pci_request_selected_regions(pdev, bars, "nvme")) 22470877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto disable_pci; 22480877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 2249052d0efada8ccfccd924059b75f5fb119cd10f9aRussell King if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) && 2250052d0efada8ccfccd924059b75f5fb119cd10f9aRussell King dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) 2251052d0efada8ccfccd924059b75f5fb119cd10f9aRussell King goto disable; 22520877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 22530877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 22540877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (!dev->bar) 22550877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto disable; 22560e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch if (readl(&dev->bar->csts) == -1) { 22570e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch result = -ENODEV; 22580e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch goto unmap; 22590e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch } 226042f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch cap = readq(&dev->bar->cap); 226142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dev->q_depth = min_t(int, NVME_CAP_MQES(cap) + 1, NVME_Q_DEPTH); 226242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dev->db_stride = 1 << NVME_CAP_STRIDE(cap); 22630877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->dbs = ((void __iomem *)dev->bar) + 4096; 22640877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 22650877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch return 0; 22660877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 22670e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch unmap: 22680e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch iounmap(dev->bar); 22690e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch dev->bar = NULL; 22700877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch disable: 22710877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_release_regions(pdev); 22720877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch disable_pci: 22730877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_device(pdev); 22740877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch return result; 22750877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch} 22760877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 22770877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Buschstatic void nvme_dev_unmap(struct nvme_dev *dev) 22780877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch{ 22790877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (dev->pci_dev->msi_enabled) 22800877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_msi(dev->pci_dev); 22810877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch else if (dev->pci_dev->msix_enabled) 22820877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_msix(dev->pci_dev); 22830877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 22840877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (dev->bar) { 22850877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch iounmap(dev->bar); 22860877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->bar = NULL; 22879a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_release_regions(dev->pci_dev); 22880877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch } 22890877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 22900877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (pci_is_enabled(dev->pci_dev)) 22910877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_device(dev->pci_dev); 22920877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch} 22930877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 22944d115420707afcabe77d2535e092356df6664b70Keith Buschstruct nvme_delq_ctx { 22954d115420707afcabe77d2535e092356df6664b70Keith Busch struct task_struct *waiter; 22964d115420707afcabe77d2535e092356df6664b70Keith Busch struct kthread_worker *worker; 22974d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_t refcount; 22984d115420707afcabe77d2535e092356df6664b70Keith Busch}; 22994d115420707afcabe77d2535e092356df6664b70Keith Busch 23004d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_wait_dq(struct nvme_delq_ctx *dq, struct nvme_dev *dev) 23014d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23024d115420707afcabe77d2535e092356df6664b70Keith Busch dq->waiter = current; 23034d115420707afcabe77d2535e092356df6664b70Keith Busch mb(); 23044d115420707afcabe77d2535e092356df6664b70Keith Busch 23054d115420707afcabe77d2535e092356df6664b70Keith Busch for (;;) { 23064d115420707afcabe77d2535e092356df6664b70Keith Busch set_current_state(TASK_KILLABLE); 23074d115420707afcabe77d2535e092356df6664b70Keith Busch if (!atomic_read(&dq->refcount)) 23084d115420707afcabe77d2535e092356df6664b70Keith Busch break; 23094d115420707afcabe77d2535e092356df6664b70Keith Busch if (!schedule_timeout(ADMIN_TIMEOUT) || 23104d115420707afcabe77d2535e092356df6664b70Keith Busch fatal_signal_pending(current)) { 23114d115420707afcabe77d2535e092356df6664b70Keith Busch set_current_state(TASK_RUNNING); 23124d115420707afcabe77d2535e092356df6664b70Keith Busch 23134d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_ctrl(dev, readq(&dev->bar->cap)); 23144d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_queue(dev, 0); 23154d115420707afcabe77d2535e092356df6664b70Keith Busch 23164d115420707afcabe77d2535e092356df6664b70Keith Busch send_sig(SIGKILL, dq->worker->task, 1); 23174d115420707afcabe77d2535e092356df6664b70Keith Busch flush_kthread_worker(dq->worker); 23184d115420707afcabe77d2535e092356df6664b70Keith Busch return; 23194d115420707afcabe77d2535e092356df6664b70Keith Busch } 23204d115420707afcabe77d2535e092356df6664b70Keith Busch } 23214d115420707afcabe77d2535e092356df6664b70Keith Busch set_current_state(TASK_RUNNING); 23224d115420707afcabe77d2535e092356df6664b70Keith Busch} 23234d115420707afcabe77d2535e092356df6664b70Keith Busch 23244d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_put_dq(struct nvme_delq_ctx *dq) 23254d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23264d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_dec(&dq->refcount); 23274d115420707afcabe77d2535e092356df6664b70Keith Busch if (dq->waiter) 23284d115420707afcabe77d2535e092356df6664b70Keith Busch wake_up_process(dq->waiter); 23294d115420707afcabe77d2535e092356df6664b70Keith Busch} 23304d115420707afcabe77d2535e092356df6664b70Keith Busch 23314d115420707afcabe77d2535e092356df6664b70Keith Buschstatic struct nvme_delq_ctx *nvme_get_dq(struct nvme_delq_ctx *dq) 23324d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23334d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_inc(&dq->refcount); 23344d115420707afcabe77d2535e092356df6664b70Keith Busch return dq; 23354d115420707afcabe77d2535e092356df6664b70Keith Busch} 23364d115420707afcabe77d2535e092356df6664b70Keith Busch 23374d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_queue_end(struct nvme_queue *nvmeq) 23384d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23394d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_delq_ctx *dq = nvmeq->cmdinfo.ctx; 23404d115420707afcabe77d2535e092356df6664b70Keith Busch 23414d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_clear_queue(nvmeq); 23424d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_put_dq(dq); 23434d115420707afcabe77d2535e092356df6664b70Keith Busch} 23444d115420707afcabe77d2535e092356df6664b70Keith Busch 23454d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int adapter_async_del_queue(struct nvme_queue *nvmeq, u8 opcode, 23464d115420707afcabe77d2535e092356df6664b70Keith Busch kthread_work_func_t fn) 23474d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23484d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_command c; 23494d115420707afcabe77d2535e092356df6664b70Keith Busch 23504d115420707afcabe77d2535e092356df6664b70Keith Busch memset(&c, 0, sizeof(c)); 23514d115420707afcabe77d2535e092356df6664b70Keith Busch c.delete_queue.opcode = opcode; 23524d115420707afcabe77d2535e092356df6664b70Keith Busch c.delete_queue.qid = cpu_to_le16(nvmeq->qid); 23534d115420707afcabe77d2535e092356df6664b70Keith Busch 23544d115420707afcabe77d2535e092356df6664b70Keith Busch init_kthread_work(&nvmeq->cmdinfo.work, fn); 23554d115420707afcabe77d2535e092356df6664b70Keith Busch return nvme_submit_admin_cmd_async(nvmeq->dev, &c, &nvmeq->cmdinfo); 23564d115420707afcabe77d2535e092356df6664b70Keith Busch} 23574d115420707afcabe77d2535e092356df6664b70Keith Busch 23584d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_cq_work_handler(struct kthread_work *work) 23594d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23604d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 23614d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo.work); 23624d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_queue_end(nvmeq); 23634d115420707afcabe77d2535e092356df6664b70Keith Busch} 23644d115420707afcabe77d2535e092356df6664b70Keith Busch 23654d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_delete_cq(struct nvme_queue *nvmeq) 23664d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23674d115420707afcabe77d2535e092356df6664b70Keith Busch return adapter_async_del_queue(nvmeq, nvme_admin_delete_cq, 23684d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_cq_work_handler); 23694d115420707afcabe77d2535e092356df6664b70Keith Busch} 23704d115420707afcabe77d2535e092356df6664b70Keith Busch 23714d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_sq_work_handler(struct kthread_work *work) 23724d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23734d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 23744d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo.work); 23754d115420707afcabe77d2535e092356df6664b70Keith Busch int status = nvmeq->cmdinfo.status; 23764d115420707afcabe77d2535e092356df6664b70Keith Busch 23774d115420707afcabe77d2535e092356df6664b70Keith Busch if (!status) 23784d115420707afcabe77d2535e092356df6664b70Keith Busch status = nvme_delete_cq(nvmeq); 23794d115420707afcabe77d2535e092356df6664b70Keith Busch if (status) 23804d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_queue_end(nvmeq); 23814d115420707afcabe77d2535e092356df6664b70Keith Busch} 23824d115420707afcabe77d2535e092356df6664b70Keith Busch 23834d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_delete_sq(struct nvme_queue *nvmeq) 23844d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23854d115420707afcabe77d2535e092356df6664b70Keith Busch return adapter_async_del_queue(nvmeq, nvme_admin_delete_sq, 23864d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_sq_work_handler); 23874d115420707afcabe77d2535e092356df6664b70Keith Busch} 23884d115420707afcabe77d2535e092356df6664b70Keith Busch 23894d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_queue_start(struct kthread_work *work) 23904d115420707afcabe77d2535e092356df6664b70Keith Busch{ 23914d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 23924d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo.work); 23934d115420707afcabe77d2535e092356df6664b70Keith Busch allow_signal(SIGKILL); 23944d115420707afcabe77d2535e092356df6664b70Keith Busch if (nvme_delete_sq(nvmeq)) 23954d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_queue_end(nvmeq); 23964d115420707afcabe77d2535e092356df6664b70Keith Busch} 23974d115420707afcabe77d2535e092356df6664b70Keith Busch 23984d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_disable_io_queues(struct nvme_dev *dev) 23994d115420707afcabe77d2535e092356df6664b70Keith Busch{ 24004d115420707afcabe77d2535e092356df6664b70Keith Busch int i; 24014d115420707afcabe77d2535e092356df6664b70Keith Busch DEFINE_KTHREAD_WORKER_ONSTACK(worker); 24024d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_delq_ctx dq; 24034d115420707afcabe77d2535e092356df6664b70Keith Busch struct task_struct *kworker_task = kthread_run(kthread_worker_fn, 24044d115420707afcabe77d2535e092356df6664b70Keith Busch &worker, "nvme%d", dev->instance); 24054d115420707afcabe77d2535e092356df6664b70Keith Busch 24064d115420707afcabe77d2535e092356df6664b70Keith Busch if (IS_ERR(kworker_task)) { 24074d115420707afcabe77d2535e092356df6664b70Keith Busch dev_err(&dev->pci_dev->dev, 24084d115420707afcabe77d2535e092356df6664b70Keith Busch "Failed to create queue del task\n"); 24094d115420707afcabe77d2535e092356df6664b70Keith Busch for (i = dev->queue_count - 1; i > 0; i--) 24104d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_queue(dev, i); 24114d115420707afcabe77d2535e092356df6664b70Keith Busch return; 24124d115420707afcabe77d2535e092356df6664b70Keith Busch } 24134d115420707afcabe77d2535e092356df6664b70Keith Busch 24144d115420707afcabe77d2535e092356df6664b70Keith Busch dq.waiter = NULL; 24154d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_set(&dq.refcount, 0); 24164d115420707afcabe77d2535e092356df6664b70Keith Busch dq.worker = &worker; 24174d115420707afcabe77d2535e092356df6664b70Keith Busch for (i = dev->queue_count - 1; i > 0; i--) { 24185a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *nvmeq = raw_nvmeq(dev, i); 24194d115420707afcabe77d2535e092356df6664b70Keith Busch 24204d115420707afcabe77d2535e092356df6664b70Keith Busch if (nvme_suspend_queue(nvmeq)) 24214d115420707afcabe77d2535e092356df6664b70Keith Busch continue; 24224d115420707afcabe77d2535e092356df6664b70Keith Busch nvmeq->cmdinfo.ctx = nvme_get_dq(&dq); 24234d115420707afcabe77d2535e092356df6664b70Keith Busch nvmeq->cmdinfo.worker = dq.worker; 24244d115420707afcabe77d2535e092356df6664b70Keith Busch init_kthread_work(&nvmeq->cmdinfo.work, nvme_del_queue_start); 24254d115420707afcabe77d2535e092356df6664b70Keith Busch queue_kthread_work(dq.worker, &nvmeq->cmdinfo.work); 24264d115420707afcabe77d2535e092356df6664b70Keith Busch } 24274d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_wait_dq(&dq, dev); 24284d115420707afcabe77d2535e092356df6664b70Keith Busch kthread_stop(kworker_task); 24294d115420707afcabe77d2535e092356df6664b70Keith Busch} 24304d115420707afcabe77d2535e092356df6664b70Keith Busch 2431b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran/* 2432b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran* Remove the node from the device list and check 2433b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran* for whether or not we need to stop the nvme_thread. 2434b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran*/ 2435b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeranstatic void nvme_dev_list_remove(struct nvme_dev *dev) 2436b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran{ 2437b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran struct task_struct *tmp = NULL; 2438b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran 2439b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran spin_lock(&dev_list_lock); 2440b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran list_del_init(&dev->node); 2441b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran if (list_empty(&dev_list) && !IS_ERR_OR_NULL(nvme_thread)) { 2442b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran tmp = nvme_thread; 2443b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran nvme_thread = NULL; 2444b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran } 2445b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran spin_unlock(&dev_list_lock); 2446b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran 2447b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran if (tmp) 2448b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran kthread_stop(tmp); 2449b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran} 2450b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran 2451f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Buschstatic void nvme_dev_shutdown(struct nvme_dev *dev) 2452b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2453224042742582c9938788b81165180c876e997a07Keith Busch int i; 2454224042742582c9938788b81165180c876e997a07Keith Busch 2455d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized = 0; 245633b1e95c90447ea73e37e837ea0268a894919f19Keith Busch unregister_hotcpu_notifier(&dev->nb); 2457b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2458b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran nvme_dev_list_remove(dev); 24591fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 24604d115420707afcabe77d2535e092356df6664b70Keith Busch if (!dev->bar || (dev->bar && readl(&dev->bar->csts) == -1)) { 24614d115420707afcabe77d2535e092356df6664b70Keith Busch for (i = dev->queue_count - 1; i >= 0; i--) { 24625a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch struct nvme_queue *nvmeq = raw_nvmeq(dev, i); 24634d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_suspend_queue(nvmeq); 24644d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_clear_queue(nvmeq); 24654d115420707afcabe77d2535e092356df6664b70Keith Busch } 24664d115420707afcabe77d2535e092356df6664b70Keith Busch } else { 24674d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_io_queues(dev); 24681894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch nvme_shutdown_ctrl(dev); 24694d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_queue(dev, 0); 24704d115420707afcabe77d2535e092356df6664b70Keith Busch } 2471f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_dev_unmap(dev); 2472f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch} 2473f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2474f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Buschstatic void nvme_dev_remove(struct nvme_dev *dev) 2475f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch{ 24769ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_ns *ns; 2477f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 24789ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch list_for_each_entry(ns, &dev->namespaces, list) { 24799ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch if (ns->disk->flags & GENHD_FL_UP) 24809ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch del_gendisk(ns->disk); 24819ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch if (!blk_queue_dying(ns->queue)) 24829ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch blk_cleanup_queue(ns->queue); 2483b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 2484b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2485b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2486091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic int nvme_setup_prp_pools(struct nvme_dev *dev) 2487091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 2488091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 2489091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dev->prp_page_pool = dma_pool_create("prp list page", dmadev, 2490091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox PAGE_SIZE, PAGE_SIZE, 0); 2491091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (!dev->prp_page_pool) 2492091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return -ENOMEM; 2493091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 249499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox /* Optimisation for I/Os between 4k and 128k */ 249599802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dev->prp_small_pool = dma_pool_create("prp list 256", dmadev, 249699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 256, 256, 0); 249799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (!dev->prp_small_pool) { 249899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 249999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox return -ENOMEM; 250099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 2501091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return 0; 2502091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 2503091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2504091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic void nvme_release_prp_pools(struct nvme_dev *dev) 2505091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 2506091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 250799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_small_pool); 2508091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 2509091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2510cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic DEFINE_IDA(nvme_instance_ida); 2511cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2512cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic int nvme_set_instance(struct nvme_dev *dev) 2513b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2514cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh int instance, error; 2515cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2516cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh do { 2517cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) 2518cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 2519cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2520cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 2521cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh error = ida_get_new(&nvme_instance_ida, &instance); 2522cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 2523cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh } while (error == -EAGAIN); 2524cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2525cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (error) 2526cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 2527cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2528cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh dev->instance = instance; 2529cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return 0; 2530b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2531b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2532b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_release_instance(struct nvme_dev *dev) 2533b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2534cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 2535cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh ida_remove(&nvme_instance_ida, dev->instance); 2536cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 2537b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2538b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 25399ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Buschstatic void nvme_free_namespaces(struct nvme_dev *dev) 25409ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch{ 25419ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_ns *ns, *next; 25429ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 25439ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 25449ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch list_del(&ns->list); 25459ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch put_disk(ns->disk); 25469ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch kfree(ns); 25479ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch } 25489ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch} 25499ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 25505e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic void nvme_free_dev(struct kref *kref) 25515e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 25525e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref); 25539ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 25549ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch nvme_free_namespaces(dev); 255542f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch free_percpu(dev->io_queue); 25565e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->queues); 25575e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->entry); 25585e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev); 25595e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 25605e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 25615e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_open(struct inode *inode, struct file *f) 25625e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 25635e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(f->private_data, struct nvme_dev, 25645e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch miscdev); 25655e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_get(&dev->kref); 25665e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch f->private_data = dev; 25675e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 25685e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 25695e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 25705e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_release(struct inode *inode, struct file *f) 25715e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 25725e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 25735e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 25745e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 25755e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 25765e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 25775e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg) 25785e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 25795e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 25805e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch switch (cmd) { 25815e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch case NVME_IOCTL_ADMIN_CMD: 25825e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return nvme_user_admin_cmd(dev, (void __user *)arg); 25835e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch default: 25845e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return -ENOTTY; 25855e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch } 25865e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 25875e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 25885e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic const struct file_operations nvme_dev_fops = { 25895e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .owner = THIS_MODULE, 25905e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .open = nvme_dev_open, 25915e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .release = nvme_dev_release, 25925e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .unlocked_ioctl = nvme_dev_ioctl, 25935e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .compat_ioctl = nvme_dev_ioctl, 25945e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch}; 25955e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 2596f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Buschstatic int nvme_dev_start(struct nvme_dev *dev) 2597f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch{ 2598f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch int result; 2599b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran bool start_thread = false; 2600f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2601f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_dev_map(dev); 2602f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch if (result) 2603f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch return result; 2604f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2605f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_configure_admin_queue(dev); 2606f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch if (result) 2607f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch goto unmap; 2608f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2609f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_lock(&dev_list_lock); 2610b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran if (list_empty(&dev_list) && IS_ERR_OR_NULL(nvme_thread)) { 2611b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran start_thread = true; 2612b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran nvme_thread = NULL; 2613b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran } 2614f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch list_add(&dev->node, &dev_list); 2615f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_unlock(&dev_list_lock); 2616f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2617b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran if (start_thread) { 2618b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 2619b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran wake_up(&nvme_kthread_wait); 2620b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran } else 2621b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran wait_event_killable(nvme_kthread_wait, nvme_thread); 2622b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran 2623b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran if (IS_ERR_OR_NULL(nvme_thread)) { 2624b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran result = nvme_thread ? PTR_ERR(nvme_thread) : -EINTR; 2625b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran goto disable; 2626b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran } 2627b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran 2628f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_setup_io_queues(dev); 2629d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result && result != -EBUSY) 2630f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch goto disable; 2631f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2632d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch return result; 2633f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2634f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch disable: 2635a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_disable_queue(dev, 0); 2636b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran nvme_dev_list_remove(dev); 2637f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch unmap: 2638f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_dev_unmap(dev); 2639f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch return result; 2640f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch} 2641f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 26429a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic int nvme_remove_dead_ctrl(void *arg) 26439a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 26449a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct nvme_dev *dev = (struct nvme_dev *)arg; 26459a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct pci_dev *pdev = dev->pci_dev; 26469a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 26479a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (pci_get_drvdata(pdev)) 26489a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_stop_and_remove_bus_device(pdev); 26499a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kref_put(&dev->kref, nvme_free_dev); 26509a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return 0; 26519a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 26529a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 26539a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic void nvme_remove_disks(struct work_struct *ws) 26549a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 26559a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); 26569a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 26579a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_remove(dev); 26585a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch nvme_free_queues(dev, 1); 26599a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 26609a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 26619a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic int nvme_dev_resume(struct nvme_dev *dev) 26629a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 26639a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch int ret; 26649a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 26659a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch ret = nvme_dev_start(dev); 26669a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (ret && ret != -EBUSY) 26679a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return ret; 26689a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (ret == -EBUSY) { 26699a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_lock(&dev_list_lock); 26709ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo dev->reset_workfn = nvme_remove_disks; 26719a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch queue_work(nvme_workq, &dev->reset_work); 26729a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_unlock(&dev_list_lock); 26739a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 2674d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized = 1; 26759a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return 0; 26769a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 26779a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 26789a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic void nvme_dev_reset(struct nvme_dev *dev) 26799a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 26809a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_shutdown(dev); 26819a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (nvme_dev_resume(dev)) { 26829a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev_err(&dev->pci_dev->dev, "Device failed to resume\n"); 26839a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kref_get(&dev->kref); 26849a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (IS_ERR(kthread_run(nvme_remove_dead_ctrl, dev, "nvme%d", 26859a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev->instance))) { 26869a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev_err(&dev->pci_dev->dev, 26879a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch "Failed to start controller remove task\n"); 26889a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kref_put(&dev->kref, nvme_free_dev); 26899a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 26909a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 26919a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 26929a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 26939a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic void nvme_reset_failed_dev(struct work_struct *ws) 26949a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 26959a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); 26969a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_reset(dev); 26979a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 26989a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 26999ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heostatic void nvme_reset_workfn(struct work_struct *work) 27009ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo{ 27019ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo struct nvme_dev *dev = container_of(work, struct nvme_dev, reset_work); 27029ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo dev->reset_workfn(work); 27039ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo} 27049ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo 27058d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) 2706b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 27070877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch int result = -ENOMEM; 2708b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev; 2709b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2710b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev = kzalloc(sizeof(*dev), GFP_KERNEL); 2711b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev) 2712b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOMEM; 2713b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->entry = kcalloc(num_possible_cpus(), sizeof(*dev->entry), 2714b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 2715b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->entry) 2716b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 27171b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queues = kcalloc(num_possible_cpus() + 1, sizeof(void *), 27181b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox GFP_KERNEL); 2719b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->queues) 2720b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 272142f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch dev->io_queue = alloc_percpu(unsigned short); 272242f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch if (!dev->io_queue) 272342f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch goto free; 2724b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2725b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox INIT_LIST_HEAD(&dev->namespaces); 27269ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo dev->reset_workfn = nvme_reset_failed_dev; 27279ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo INIT_WORK(&dev->reset_work, nvme_reset_workfn); 2728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->pci_dev = pdev; 27299a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_set_drvdata(pdev, dev); 2730cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh result = nvme_set_instance(dev); 2731cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (result) 27320877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto free; 2733b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2734091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox result = nvme_setup_prp_pools(dev); 2735091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (result) 27360877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto release; 2737091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2738fb35e914b3f88cda9ee6f9d776910c35269c4ecfKeith Busch kref_init(&dev->kref); 2739f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_dev_start(dev); 2740d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result) { 2741d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result == -EBUSY) 2742d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch goto create_cdev; 27430877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto release_pools; 2744d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch } 2745b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2746740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox result = nvme_dev_add(dev); 2747d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result) 2748f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch goto shutdown; 2749740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 2750d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch create_cdev: 27515e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch scnprintf(dev->name, sizeof(dev->name), "nvme%d", dev->instance); 27525e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.minor = MISC_DYNAMIC_MINOR; 27535e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.parent = &pdev->dev; 27545e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.name = dev->name; 27555e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.fops = &nvme_dev_fops; 27565e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch result = misc_register(&dev->miscdev); 27575e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch if (result) 27585e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch goto remove; 27595e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 2760d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized = 1; 2761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 2762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 27635e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch remove: 27645e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_dev_remove(dev); 27659ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch nvme_free_namespaces(dev); 2766f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch shutdown: 2767f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_dev_shutdown(dev); 27680877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch release_pools: 2769a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_free_queues(dev, 0); 2770091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 27710877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch release: 27720877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch nvme_release_instance(dev); 2773b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free: 277442f614201e80ff4cfb8b285d7190149a8e1e6cecKeith Busch free_percpu(dev->io_queue); 2775b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 2776b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 2777b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 2778b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 2779b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2780b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 278109ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Buschstatic void nvme_shutdown(struct pci_dev *pdev) 278209ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch{ 278309ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch struct nvme_dev *dev = pci_get_drvdata(pdev); 278409ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch nvme_dev_shutdown(dev); 278509ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch} 278609ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch 27878d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic void nvme_remove(struct pci_dev *pdev) 2788b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2789b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev = pci_get_drvdata(pdev); 27909a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 27919a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_lock(&dev_list_lock); 27929a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch list_del_init(&dev->node); 27939a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_unlock(&dev_list_lock); 27949a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 27959a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_set_drvdata(pdev, NULL); 27969a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch flush_work(&dev->reset_work); 27975e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch misc_deregister(&dev->miscdev); 27989a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_remove(dev); 27999a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_shutdown(dev); 2800a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_free_queues(dev, 0); 28015a92e700af2e5e0e6404988d6a7f2ed3dad3f46fKeith Busch rcu_barrier(); 28029a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_release_instance(dev); 28039a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_release_prp_pools(dev); 28045e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 2805b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2806b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2807b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* These functions are yet to be implemented */ 2808b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_detected NULL 2809b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_dump_registers NULL 2810b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_link_reset NULL 2811b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_slot_reset NULL 2812b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_resume NULL 2813cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2814671a6018db1d359254c8201704cf967efb42fc25Jingoo Han#ifdef CONFIG_PM_SLEEP 2815cd63894630ab17a192bf97427d16dbec10710a6aKeith Buschstatic int nvme_suspend(struct device *dev) 2816cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch{ 2817cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct pci_dev *pdev = to_pci_dev(dev); 2818cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct nvme_dev *ndev = pci_get_drvdata(pdev); 2819cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2820cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvme_dev_shutdown(ndev); 2821cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return 0; 2822cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch} 2823cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2824cd63894630ab17a192bf97427d16dbec10710a6aKeith Buschstatic int nvme_resume(struct device *dev) 2825cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch{ 2826cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct pci_dev *pdev = to_pci_dev(dev); 2827cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct nvme_dev *ndev = pci_get_drvdata(pdev); 2828cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 28299a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (nvme_dev_resume(ndev) && !work_busy(&ndev->reset_work)) { 28309ca9737444f1a8602f74b85018d881e7e54b5bd1Tejun Heo ndev->reset_workfn = nvme_reset_failed_dev; 28319a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch queue_work(nvme_workq, &ndev->reset_work); 28329a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 28339a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return 0; 2834cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch} 2835671a6018db1d359254c8201704cf967efb42fc25Jingoo Han#endif 2836cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2837cd63894630ab17a192bf97427d16dbec10710a6aKeith Buschstatic SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume); 2838b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 28391d3520357df99baf4ad89f86268ac96cd38092d9Stephen Hemmingerstatic const struct pci_error_handlers nvme_err_handler = { 2840b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .error_detected = nvme_error_detected, 2841b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .mmio_enabled = nvme_dump_registers, 2842b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .link_reset = nvme_link_reset, 2843b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .slot_reset = nvme_slot_reset, 2844b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_error_resume, 2845b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2846b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2847b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* Move to pci_ids.h later */ 2848b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define PCI_CLASS_STORAGE_EXPRESS 0x010802 2849b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 28506eb0d698efa9c2a35ec3ca958699717c603f85eeMatthew Wilcoxstatic const struct pci_device_id nvme_id_table[] = { 2851b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 2852b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { 0, } 2853b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2854b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_DEVICE_TABLE(pci, nvme_id_table); 2855b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2856b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct pci_driver nvme_driver = { 2857b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .name = "nvme", 2858b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .id_table = nvme_id_table, 2859b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .probe = nvme_probe, 28608d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartman .remove = nvme_remove, 286109ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch .shutdown = nvme_shutdown, 2862cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch .driver = { 2863cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch .pm = &nvme_dev_pm_ops, 2864cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch }, 2865b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .err_handler = &nvme_err_handler, 2866b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2867b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2868b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __init nvme_init(void) 2869b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 28700ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox int result; 28711fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 2872b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran init_waitqueue_head(&nvme_kthread_wait); 2873b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 28749a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_workq = create_singlethread_workqueue("nvme"); 28759a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (!nvme_workq) 2876b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran return -ENOMEM; 28779a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 28785c42ea1643a630060f9e71e06d3933d244970967Keith Busch result = register_blkdev(nvme_major, "nvme"); 28795c42ea1643a630060f9e71e06d3933d244970967Keith Busch if (result < 0) 28809a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch goto kill_workq; 28815c42ea1643a630060f9e71e06d3933d244970967Keith Busch else if (result > 0) 28820ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox nvme_major = result; 2883b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2884b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = pci_register_driver(&nvme_driver); 28851fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (result) 28861fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto unregister_blkdev; 28871fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 2888b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 28891fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox unregister_blkdev: 2890b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 28919a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kill_workq: 28929a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch destroy_workqueue(nvme_workq); 2893b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 2894b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2895b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2896b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __exit nvme_exit(void) 2897b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2898b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_unregister_driver(&nvme_driver); 2899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 29009a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch destroy_workqueue(nvme_workq); 2901b9afca3efb18a9b8392cb544a3e29e8b1168400cDan McLeran BUG_ON(nvme_thread && !IS_ERR(nvme_thread)); 2902b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2903b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2904b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 2905b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_LICENSE("GPL"); 29066eb0d698efa9c2a35ec3ca958699717c603f85eeMatthew WilcoxMODULE_VERSION("0.9"); 2907b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_init(nvme_init); 2908b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_exit(nvme_exit); 2909