nvme-core.c revision be577fabf3ec2c9593f4d3c044283be783b88c3b
1b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 2b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * NVM Express device driver 3b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Copyright (c) 2011, 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 * You should have received a copy of the GNU General Public License along with 15b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * this program; if not, write to the Free Software Foundation, Inc., 16b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 17b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 18b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/nvme.h> 20b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/bio.h> 218de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox#include <linux/bitops.h> 22b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/blkdev.h> 23fd63e9ceeeae58cfe877c2d49d41c1bf7532303cMatthew Wilcox#include <linux/delay.h> 24b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/errno.h> 25b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/fs.h> 26b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/genhd.h> 275aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox#include <linux/idr.h> 28b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/init.h> 29b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/interrupt.h> 30b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/io.h> 31b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/kdev_t.h> 321fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox#include <linux/kthread.h> 33b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/kernel.h> 34b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/mm.h> 35b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/module.h> 36b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/moduleparam.h> 37b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/pci.h> 38be7b62754e097adc0cb16c25c9ee86ee20de62fbMatthew Wilcox#include <linux/poison.h> 39c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox#include <linux/ptrace.h> 40b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/sched.h> 41b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/slab.h> 42b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/types.h> 435d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma#include <scsi/sg.h> 44797a796a13df6b84a4791e57306737059b5b2384Hitoshi Mitake#include <asm-generic/io-64-nonatomic-lo-hi.h> 45797a796a13df6b84a4791e57306737059b5b2384Hitoshi Mitake 46b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define NVME_Q_DEPTH 1024 47b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) 48b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) 49e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox#define ADMIN_TIMEOUT (60 * HZ) 50b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 51b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_major; 52b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_param(nvme_major, int, 0); 53b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic int use_threaded_interrupts; 5558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxmodule_param(use_threaded_interrupts, int, 0); 5658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 571fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic DEFINE_SPINLOCK(dev_list_lock); 581fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic LIST_HEAD(dev_list); 591fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic struct task_struct *nvme_thread; 609a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic struct workqueue_struct *nvme_workq; 611fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 62d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Buschstatic void nvme_reset_failed_dev(struct work_struct *ws); 63d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch 644d115420707afcabe77d2535e092356df6664b70Keith Buschstruct async_cmd_info { 654d115420707afcabe77d2535e092356df6664b70Keith Busch struct kthread_work work; 664d115420707afcabe77d2535e092356df6664b70Keith Busch struct kthread_worker *worker; 674d115420707afcabe77d2535e092356df6664b70Keith Busch u32 result; 684d115420707afcabe77d2535e092356df6664b70Keith Busch int status; 694d115420707afcabe77d2535e092356df6664b70Keith Busch void *ctx; 704d115420707afcabe77d2535e092356df6664b70Keith Busch}; 711fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 72b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 73b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * An NVM Express queue. Each device has at least two (one for admin 74b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * commands and one for I/O commands). 75b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 76b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstruct nvme_queue { 77b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *q_dmadev; 78091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct nvme_dev *dev; 793193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox char irqname[24]; /* nvme4294967295-65535\0 */ 80b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spinlock_t q_lock; 81b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command *sq_cmds; 82b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox volatile struct nvme_completion *cqes; 83b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t sq_dma_addr; 84b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t cq_dma_addr; 85b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_queue_head_t sq_full; 861fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox wait_queue_t sq_cong_wait; 87b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio_list sq_cong; 88b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 __iomem *q_db; 89b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 q_depth; 90b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_vector; 91b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_head; 92b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_tail; 93b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_head; 94c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch u16 qid; 95e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox u8 cq_phase; 96e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox u8 cqe_seen; 97224042742582c9938788b81165180c876e997a07Keith Busch u8 q_suspended; 984d115420707afcabe77d2535e092356df6664b70Keith Busch struct async_cmd_info cmdinfo; 99b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long cmdid_data[]; 100b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 101b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 102b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 103b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Check we didin't inadvertently grow the command struct 104b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 105b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic inline void _nvme_check_size(void) 106b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 107b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); 108b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); 109b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); 110b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); 111b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_features) != 64); 112f8ebf8409abfdaeeb8c847381629a2a8b8e3d816Vishal Verma BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); 113c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); 114b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_command) != 64); 115b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); 116b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); 117b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); 1186ecec74520d8a357726e6c12f99080dbe7b347ddKeith Busch BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); 119b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 120b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1215c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxtypedef void (*nvme_completion_fn)(struct nvme_dev *, void *, 122c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *); 123c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 124e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstruct nvme_cmd_info { 125c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 126c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 127e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox unsigned long timeout; 128c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch int aborted; 129e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox}; 130e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 131e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstatic struct nvme_cmd_info *nvme_cmd_info(struct nvme_queue *nvmeq) 132e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox{ 133e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return (void *)&nvmeq->cmdid_data[BITS_TO_LONGS(nvmeq->q_depth)]; 134e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox} 135e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 136224042742582c9938788b81165180c876e997a07Keith Buschstatic unsigned nvme_queue_extra(int depth) 137224042742582c9938788b81165180c876e997a07Keith Busch{ 138224042742582c9938788b81165180c876e997a07Keith Busch return DIV_ROUND_UP(depth, 8) + (depth * sizeof(struct nvme_cmd_info)); 139224042742582c9938788b81165180c876e997a07Keith Busch} 140224042742582c9938788b81165180c876e997a07Keith Busch 141b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 142714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * alloc_cmdid() - Allocate a Command ID 143714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @nvmeq: The queue that will be used for this command 144714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @ctx: A pointer that will be passed to the handler 145c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox * @handler: The function to call on completion 146b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 147b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Allocate a Command ID for a queue. The data passed in will 148b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * be passed to the completion handler. This is implemented by using 149b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the bottom two bits of the ctx pointer to store the handler ID. 150b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Passing in a pointer that's not 4-byte aligned will cause a BUG. 151b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * We can change this if it becomes a problem. 152184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * 153184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * May be called with local interrupts disabled and the q_lock held, 154184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * or with interrupts enabled and no locks held. 155b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 156c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic int alloc_cmdid(struct nvme_queue *nvmeq, void *ctx, 157c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 158b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 159e6d15f79f997a98b3a69abbc462fc9041cc1a7b4Matthew Wilcox int depth = nvmeq->q_depth - 1; 160e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 161b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 162b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 163b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox do { 164b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdid = find_first_zero_bit(nvmeq->cmdid_data, depth); 165b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid >= depth) 166b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EBUSY; 167b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } while (test_and_set_bit(cmdid, nvmeq->cmdid_data)); 168b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 169c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = handler; 170c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].ctx = ctx; 171e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].timeout = jiffies + timeout; 172c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch info[cmdid].aborted = 0; 173b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 174b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 175b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 176b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int alloc_cmdid_killable(struct nvme_queue *nvmeq, void *ctx, 177c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 178b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 179b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 180b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_event_killable(nvmeq->sq_full, 181e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox (cmdid = alloc_cmdid(nvmeq, ctx, handler, timeout)) >= 0); 182b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return (cmdid < 0) ? -EINTR : cmdid; 183b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 184b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 185c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox/* Special values must be less than 0x1000 */ 186c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox#define CMD_CTX_BASE ((void *)POISON_POINTER_DELTA) 187d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_CANCELLED (0x30C + CMD_CTX_BASE) 188d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_COMPLETED (0x310 + CMD_CTX_BASE) 189d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_INVALID (0x314 + CMD_CTX_BASE) 19000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox#define CMD_CTX_FLUSH (0x318 + CMD_CTX_BASE) 191c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch#define CMD_CTX_ABORT (0x31C + CMD_CTX_BASE) 192be7b62754e097adc0cb16c25c9ee86ee20de62fbMatthew Wilcox 1935c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void special_completion(struct nvme_dev *dev, void *ctx, 194c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 195c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 196c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_CANCELLED) 197c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 198c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_FLUSH) 199c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 200c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (ctx == CMD_CTX_ABORT) { 201c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch ++dev->abort_limit; 202c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 203c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch } 204c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_COMPLETED) { 2055c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 206c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "completed id %d twice on queue %d\n", 207c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 208c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 209c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 210c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_INVALID) { 2115c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 212c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "invalid id %d completed on queue %d\n", 213c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 214c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 215c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 216c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 2175c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, "Unknown special completion %p\n", ctx); 218c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 219c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 2204d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void async_completion(struct nvme_dev *dev, void *ctx, 2214d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_completion *cqe) 2224d115420707afcabe77d2535e092356df6664b70Keith Busch{ 2234d115420707afcabe77d2535e092356df6664b70Keith Busch struct async_cmd_info *cmdinfo = ctx; 2244d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo->result = le32_to_cpup(&cqe->result); 2254d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 2264d115420707afcabe77d2535e092356df6664b70Keith Busch queue_kthread_work(cmdinfo->worker, &cmdinfo->work); 2274d115420707afcabe77d2535e092356df6664b70Keith Busch} 2284d115420707afcabe77d2535e092356df6664b70Keith Busch 229184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 230184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 231184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 232c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *free_cmdid(struct nvme_queue *nvmeq, int cmdid, 233c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 234b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 235c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 236e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 237b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 238c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (cmdid >= nvmeq->q_depth) { 239c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = special_completion; 24048e3d39816416b3bf03dee3a796c0c04427c1a31Matthew Wilcox return CMD_CTX_INVALID; 241c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 242859361a228258edf4821d9f5635825033eca78e8Keith Busch if (fn) 243859361a228258edf4821d9f5635825033eca78e8Keith Busch *fn = info[cmdid].fn; 244c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 245c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 246e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_COMPLETED; 247b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox clear_bit(cmdid, nvmeq->cmdid_data); 248b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wake_up(&nvmeq->sq_full); 249c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 250b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 251b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 252c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *cancel_cmdid(struct nvme_queue *nvmeq, int cmdid, 253c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 2543c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 255c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 256e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 257c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (fn) 258c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = info[cmdid].fn; 259c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 260c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 261e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_CANCELLED; 262c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 2633c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 2643c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 2655d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermastruct nvme_queue *get_nvmeq(struct nvme_dev *dev) 266b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 267040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox return dev->queues[get_cpu() + 1]; 268b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 269b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2705d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid put_nvmeq(struct nvme_queue *nvmeq) 271b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2721b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox put_cpu(); 273b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 274b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 275b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 276714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * nvme_submit_cmd() - Copy a command into a queue and ring the doorbell 277b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @nvmeq: The queue to use 278b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @cmd: The command to send 279b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 280b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Safe to use from interrupt context 281b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 282b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) 283b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 284b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long flags; 285b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 tail; 286b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_irqsave(&nvmeq->q_lock, flags); 287b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = nvmeq->sq_tail; 288b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); 289b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++tail == nvmeq->q_depth) 290b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = 0; 2917547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(tail, nvmeq->q_db); 292b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = tail; 293b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_unlock_irqrestore(&nvmeq->q_lock, flags); 294b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 295b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 296b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 297b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 298eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic __le64 **iod_list(struct nvme_iod *iod) 299e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews{ 300eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ((void *)iod) + iod->offset; 301e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews} 302e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 303eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox/* 304eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * Will slightly overestimate the number of pages needed. This is OK 305eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * as it only leads to a small amount of wasted memory for the lifetime of 306eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * the I/O. 307eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox */ 308eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_npages(unsigned size) 309eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox{ 310eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned nprps = DIV_ROUND_UP(size + PAGE_SIZE, PAGE_SIZE); 311eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); 312eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox} 313b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 314eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic struct nvme_iod * 315eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxnvme_alloc_iod(unsigned nseg, unsigned nbytes, gfp_t gfp) 316b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 317eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + 318eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(__le64 *) * nvme_npages(nbytes) + 319eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(struct scatterlist) * nseg, gfp); 320eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 321eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod) { 322eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->offset = offsetof(struct nvme_iod, sg[nseg]); 323eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 324eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->length = nbytes; 3252b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch iod->nents = 0; 3266198221fa0df0298513b35796f63f242ea97134eKeith Busch iod->start_time = jiffies; 327eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 328eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 329eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 330b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 331b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3325d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) 333b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 334eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox const int last_prp = PAGE_SIZE / 8 - 1; 335eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int i; 336eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 337eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t prp_dma = iod->first_dma; 338eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 339eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod->npages == 0) 340eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_small_pool, list[0], prp_dma); 341eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox for (i = 0; i < iod->npages; i++) { 342eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 *prp_list = list[i]; 343eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); 344eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); 345eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox prp_dma = next_prp_dma; 346eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 347eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 348b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 349b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3506198221fa0df0298513b35796f63f242ea97134eKeith Buschstatic void nvme_start_io_acct(struct bio *bio) 3516198221fa0df0298513b35796f63f242ea97134eKeith Busch{ 3526198221fa0df0298513b35796f63f242ea97134eKeith Busch struct gendisk *disk = bio->bi_bdev->bd_disk; 3536198221fa0df0298513b35796f63f242ea97134eKeith Busch const int rw = bio_data_dir(bio); 3546198221fa0df0298513b35796f63f242ea97134eKeith Busch int cpu = part_stat_lock(); 3556198221fa0df0298513b35796f63f242ea97134eKeith Busch part_round_stats(cpu, &disk->part0); 3566198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_inc(cpu, &disk->part0, ios[rw]); 3576198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_add(cpu, &disk->part0, sectors[rw], bio_sectors(bio)); 3586198221fa0df0298513b35796f63f242ea97134eKeith Busch part_inc_in_flight(&disk->part0, rw); 3596198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_unlock(); 3606198221fa0df0298513b35796f63f242ea97134eKeith Busch} 3616198221fa0df0298513b35796f63f242ea97134eKeith Busch 3626198221fa0df0298513b35796f63f242ea97134eKeith Buschstatic void nvme_end_io_acct(struct bio *bio, unsigned long start_time) 3636198221fa0df0298513b35796f63f242ea97134eKeith Busch{ 3646198221fa0df0298513b35796f63f242ea97134eKeith Busch struct gendisk *disk = bio->bi_bdev->bd_disk; 3656198221fa0df0298513b35796f63f242ea97134eKeith Busch const int rw = bio_data_dir(bio); 3666198221fa0df0298513b35796f63f242ea97134eKeith Busch unsigned long duration = jiffies - start_time; 3676198221fa0df0298513b35796f63f242ea97134eKeith Busch int cpu = part_stat_lock(); 3686198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_add(cpu, &disk->part0, ticks[rw], duration); 3696198221fa0df0298513b35796f63f242ea97134eKeith Busch part_round_stats(cpu, &disk->part0); 3706198221fa0df0298513b35796f63f242ea97134eKeith Busch part_dec_in_flight(&disk->part0, rw); 3716198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_unlock(); 3726198221fa0df0298513b35796f63f242ea97134eKeith Busch} 3736198221fa0df0298513b35796f63f242ea97134eKeith Busch 3745c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void bio_completion(struct nvme_dev *dev, void *ctx, 375b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion *cqe) 376b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 377eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = ctx; 378eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct bio *bio = iod->private; 379b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 status = le16_to_cpup(&cqe->status) >> 1; 380b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3819e59d091b0eb04f223ed037348e3d9e36f30e72bKeith Busch if (iod->nents) { 3822b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 383b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_data_dir(bio) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 3849e59d091b0eb04f223ed037348e3d9e36f30e72bKeith Busch nvme_end_io_acct(bio, iod->start_time); 3859e59d091b0eb04f223ed037348e3d9e36f30e72bKeith Busch } 386eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 387427e97080196548557b288517537ab7eb48c309fKeith Busch if (status) 3881ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, -EIO); 389427e97080196548557b288517537ab7eb48c309fKeith Busch else 3901ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, 0); 391b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 392b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 393184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* length is in bytes. gfp flags indicates whether we may sleep. */ 3945d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_setup_prps(struct nvme_dev *dev, struct nvme_common_command *cmd, 3955d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma struct nvme_iod *iod, int total_len, gfp_t gfp) 396ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox{ 39799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox struct dma_pool *pool; 398eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int length = total_len; 399eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct scatterlist *sg = iod->sg; 400ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int dma_len = sg_dma_len(sg); 401ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox u64 dma_addr = sg_dma_address(sg); 402ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int offset = offset_in_page(dma_addr); 403e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *prp_list; 404eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 405e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr_t prp_dma; 406eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int nprps, i; 407ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 408ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp1 = cpu_to_le64(dma_addr); 409ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox length -= (PAGE_SIZE - offset); 410ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= 0) 411eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 412ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 413ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len -= (PAGE_SIZE - offset); 414ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (dma_len) { 415ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr += (PAGE_SIZE - offset); 416ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } else { 417ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox sg = sg_next(sg); 418ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr = sg_dma_address(sg); 419ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len = sg_dma_len(sg); 420ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 421ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 422ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= PAGE_SIZE) { 423ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 424eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 425e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 426e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 427e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews nprps = DIV_ROUND_UP(length, PAGE_SIZE); 42899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (nprps <= (256 / 8)) { 42999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_small_pool; 430eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 0; 43199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } else { 43299802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_page_pool; 433eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 1; 43499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 43599802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 436b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 437b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (!prp_list) { 438b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 439eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 440eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return (total_len - length) + PAGE_SIZE; 441b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox } 442eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[0] = prp_list; 443eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->first_dma = prp_dma; 444e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews cmd->prp2 = cpu_to_le64(prp_dma); 445e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews i = 0; 446e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews for (;;) { 4477523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox if (i == PAGE_SIZE / 8) { 448e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *old_prp_list = prp_list; 449b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 450eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!prp_list) 451eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len - length; 452eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[iod->npages++] = prp_list; 4537523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox prp_list[0] = old_prp_list[i - 1]; 4547523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox old_prp_list[i - 1] = cpu_to_le64(prp_dma); 4557523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox i = 1; 456e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 457e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews prp_list[i++] = cpu_to_le64(dma_addr); 458e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len -= PAGE_SIZE; 459e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr += PAGE_SIZE; 460e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews length -= PAGE_SIZE; 461e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (length <= 0) 462e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews break; 463e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (dma_len > 0) 464e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews continue; 465e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews BUG_ON(dma_len < 0); 466e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews sg = sg_next(sg); 467e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr = sg_dma_address(sg); 468e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len = sg_dma_len(sg); 469ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 470ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 471eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 472ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox} 473ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 474427e97080196548557b288517537ab7eb48c309fKeith Buschstatic int nvme_split_and_submit(struct bio *bio, struct nvme_queue *nvmeq, 47520d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet int len) 476427e97080196548557b288517537ab7eb48c309fKeith Busch{ 47720d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet struct bio *split = bio_split(bio, len >> 9, GFP_ATOMIC, NULL); 47820d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet if (!split) 479427e97080196548557b288517537ab7eb48c309fKeith Busch return -ENOMEM; 480427e97080196548557b288517537ab7eb48c309fKeith Busch 48120d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet bio_chain(split, bio); 48220d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet 483427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 484427e97080196548557b288517537ab7eb48c309fKeith Busch add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 48520d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet bio_list_add(&nvmeq->sq_cong, split); 48620d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet bio_list_add(&nvmeq->sq_cong, bio); 487427e97080196548557b288517537ab7eb48c309fKeith Busch 488427e97080196548557b288517537ab7eb48c309fKeith Busch return 0; 489427e97080196548557b288517537ab7eb48c309fKeith Busch} 490427e97080196548557b288517537ab7eb48c309fKeith Busch 4911ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox/* NVMe scatterlists require no holes in the virtual address */ 4921ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox#define BIOVEC_NOT_VIRT_MERGEABLE(vec1, vec2) ((vec2)->bv_offset || \ 4931ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox (((vec1)->bv_offset + (vec1)->bv_len) % PAGE_SIZE)) 4941ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox 495427e97080196548557b288517537ab7eb48c309fKeith Buschstatic int nvme_map_bio(struct nvme_queue *nvmeq, struct nvme_iod *iod, 496b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio, enum dma_data_direction dma_dir, int psegs) 497b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 4987988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet struct bio_vec bvec, bvprv; 4997988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet struct bvec_iter iter; 500768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct scatterlist *sg = NULL; 5017988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet int length = 0, nsegs = 0, split_len = bio->bi_iter.bi_size; 5027988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet int first = 1; 503159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch 504159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (nvmeq->dev->stripe_size) 505159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch split_len = nvmeq->dev->stripe_size - 5064f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet ((bio->bi_iter.bi_sector << 9) & 5074f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet (nvmeq->dev->stripe_size - 1)); 508b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 509eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg_init_table(iod->sg, psegs); 5107988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet bio_for_each_segment(bvec, bio, iter) { 5117988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet if (!first && BIOVEC_PHYS_MERGEABLE(&bvprv, &bvec)) { 5127988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet sg->length += bvec.bv_len; 513768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } else { 5147988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet if (!first && BIOVEC_NOT_VIRT_MERGEABLE(&bvprv, &bvec)) 5157988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet return nvme_split_and_submit(bio, nvmeq, 51620d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet length); 517427e97080196548557b288517537ab7eb48c309fKeith Busch 518eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = sg ? sg + 1 : iod->sg; 5197988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet sg_set_page(sg, bvec.bv_page, 5207988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet bvec.bv_len, bvec.bv_offset); 521768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox nsegs++; 522768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } 523159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch 5247988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet if (split_len - length < bvec.bv_len) 52520d0189b1012a37d2533a87fb451f7852f2418d1Kent Overstreet return nvme_split_and_submit(bio, nvmeq, split_len); 5267988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet length += bvec.bv_len; 527768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvprv = bvec; 5287988613b0e5b2638caf6cd493cc78e9595eba19cKent Overstreet first = 0; 529b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 530eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->nents = nsegs; 531768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_mark_end(sg); 532427e97080196548557b288517537ab7eb48c309fKeith Busch if (dma_map_sg(nvmeq->q_dmadev, iod->sg, iod->nents, dma_dir) == 0) 5331ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return -ENOMEM; 534427e97080196548557b288517537ab7eb48c309fKeith Busch 5354f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet BUG_ON(length != bio->bi_iter.bi_size); 5361ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return length; 537b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 538b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5390e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch/* 5400e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * We reuse the small pool to allocate the 16-byte range here as it is not 5410e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * worth having a special pool for these or additional cases to handle freeing 5420e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * the iod. 5430e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch */ 5440e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic int nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, 5450e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct bio *bio, struct nvme_iod *iod, int cmdid) 5460e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 5470e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_dsm_range *range; 5480e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 5490e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5500e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range = dma_pool_alloc(nvmeq->dev->prp_small_pool, GFP_ATOMIC, 5510e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch &iod->first_dma); 5520e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (!range) 5530e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return -ENOMEM; 5540e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5550e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod_list(iod)[0] = (__le64 *)range; 5560e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod->npages = 0; 5570e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5580e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->cattr = cpu_to_le32(0); 5594f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet range->nlb = cpu_to_le32(bio->bi_iter.bi_size >> ns->lba_shift); 5604f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet range->slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_iter.bi_sector)); 5610e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5620e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch memset(cmnd, 0, sizeof(*cmnd)); 5630e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.opcode = nvme_cmd_dsm; 5640e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.command_id = cmdid; 5650e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); 5660e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.prp1 = cpu_to_le64(iod->first_dma); 5670e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nr = 0; 5680e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); 5690e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5700e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (++nvmeq->sq_tail == nvmeq->q_depth) 5710e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvmeq->sq_tail = 0; 5720e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch writel(nvmeq->sq_tail, nvmeq->q_db); 5730e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5740e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return 0; 5750e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 5760e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 57700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcoxstatic int nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, 57800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid) 57900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 58000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 58100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 58200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 58300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.opcode = nvme_cmd_flush; 58400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.command_id = cmdid; 58500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.nsid = cpu_to_le32(ns->ns_id); 58600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 58700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 58800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox nvmeq->sq_tail = 0; 58900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 59000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 59100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return 0; 59200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 59300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 5945d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns) 59500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 59600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid = alloc_cmdid(nvmeq, (void *)CMD_CTX_FLUSH, 597ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox special_completion, NVME_IO_TIMEOUT); 59800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (unlikely(cmdid < 0)) 59900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return cmdid; 60000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 60100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 60200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 60300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 604184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 605184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 606184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 607b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns, 608b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio) 609b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 610ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox struct nvme_command *cmnd; 611eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 612b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox enum dma_data_direction dma_dir; 6131287dabd345f447bbe0f7a99fc95ab89bcfc0f5dWei Yongjun int cmdid, length, result; 614b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 control; 615b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 dsmgmt; 616b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int psegs = bio_phys_segments(ns->queue, bio); 617b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 61800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && psegs) { 61900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox result = nvme_submit_flush_data(nvmeq, ns); 62000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (result) 62100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return result; 62200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox } 62300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 6241287dabd345f447bbe0f7a99fc95ab89bcfc0f5dWei Yongjun result = -ENOMEM; 6254f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet iod = nvme_alloc_iod(psegs, bio->bi_iter.bi_size, GFP_ATOMIC); 626eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!iod) 627eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox goto nomem; 628eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->private = bio; 629b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 630eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = -EBUSY; 631ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox cmdid = alloc_cmdid(nvmeq, iod, bio_completion, NVME_IO_TIMEOUT); 632b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (unlikely(cmdid < 0)) 633eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 634b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6350e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (bio->bi_rw & REQ_DISCARD) { 6360e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch result = nvme_submit_discard(nvmeq, ns, bio, iod, cmdid); 6370e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (result) 6380e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch goto free_cmdid; 6390e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return result; 6400e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch } 64100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && !psegs) 64200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 64300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 644b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control = 0; 645b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_FUA) 646b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_FUA; 647b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & (REQ_FAILFAST_DEV | REQ_RAHEAD)) 648b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_LR; 649b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 650b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt = 0; 651b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_RAHEAD) 652b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; 653b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 654ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 655b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 656b8deb62cf271fa9381edc8cf52bcae2f0225c55aMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio_data_dir(bio)) { 658ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_write; 659b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_TO_DEVICE; 660b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } else { 661ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_read; 662b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_FROM_DEVICE; 663b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 664b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 665427e97080196548557b288517537ab7eb48c309fKeith Busch result = nvme_map_bio(nvmeq, iod, bio, dma_dir, psegs); 666427e97080196548557b288517537ab7eb48c309fKeith Busch if (result <= 0) 667859361a228258edf4821d9f5635825033eca78e8Keith Busch goto free_cmdid; 6681ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length = result; 669b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 670ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.command_id = cmdid; 671ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.nsid = cpu_to_le32(ns->ns_id); 672eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(nvmeq->dev, &cmnd->common, iod, length, 673eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_ATOMIC); 6744f024f3797c43cb4b73cd2c50cec728842d0e49eKent Overstreet cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_iter.bi_sector)); 6751ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox cmnd->rw.length = cpu_to_le16((length >> ns->lba_shift) - 1); 676ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.control = cpu_to_le16(control); 677ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); 678b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6796198221fa0df0298513b35796f63f242ea97134eKeith Busch nvme_start_io_acct(bio); 680b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 681b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = 0; 6827547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 683b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6841974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox return 0; 6851974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox 686859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid: 687859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid(nvmeq, cmdid, NULL); 688eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 689eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(nvmeq->dev, iod); 690eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox nomem: 691eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox return result; 692b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 693b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 694e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcoxstatic int nvme_process_cq(struct nvme_queue *nvmeq) 695b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 696821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 head, phase; 697b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 698b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = nvmeq->cq_head; 699821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = nvmeq->cq_phase; 700b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 701b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (;;) { 702c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 703c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 704b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion cqe = nvmeq->cqes[head]; 705821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != phase) 706b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox break; 707b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 708b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++head == nvmeq->q_depth) { 709b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = 0; 710821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = !phase; 711b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 712b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 713c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = free_cmdid(nvmeq, cqe.command_id, &fn); 7145c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox fn(nvmeq->dev, ctx, &cqe); 715b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 716b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 717b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* If the controller ignores the cq head doorbell and continuously 718b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * writes to the queue, it is theoretically possible to wrap around 719b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the queue twice and mistakenly return IRQ_NONE. Linux only 720b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * requires that 0.1% of your interrupts are handled, so this isn't 721b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * a big problem. 722b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 723821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 724e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox return 0; 725b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 726b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu writel(head, nvmeq->q_db + nvmeq->dev->db_stride); 727b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = head; 728821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = phase; 729b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 730e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvmeq->cqe_seen = 1; 731e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox return 1; 732b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 733b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7347d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcoxstatic void nvme_make_request(struct request_queue *q, struct bio *bio) 7357d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox{ 7367d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox struct nvme_ns *ns = q->queuedata; 7377d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(ns->dev); 7387d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox int result = -EBUSY; 7397d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 740cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch if (!nvmeq) { 741cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch put_nvmeq(NULL); 742cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch bio_endio(bio, -EIO); 743cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return; 744cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch } 745cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 7467d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 747224042742582c9938788b81165180c876e997a07Keith Busch if (!nvmeq->q_suspended && bio_list_empty(&nvmeq->sq_cong)) 7487d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox result = nvme_submit_bio_queue(nvmeq, ns, bio); 7497d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox if (unlikely(result)) { 7507d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 7517d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 7527d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 7537d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox } 7547d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 7557d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox nvme_process_cq(nvmeq); 7567d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 7577d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox put_nvmeq(nvmeq); 7587d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox} 7597d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 760b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_irq(int irq, void *data) 761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 76258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox irqreturn_t result; 76358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 76458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_lock(&nvmeq->q_lock); 765e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvme_process_cq(nvmeq); 766e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; 767e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvmeq->cqe_seen = 0; 76858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_unlock(&nvmeq->q_lock); 76958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return result; 77058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 77158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 77258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic irqreturn_t nvme_irq_check(int irq, void *data) 77358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox{ 77458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 77558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 77658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 77758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_NONE; 77858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_WAKE_THREAD; 77958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 78058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 7813c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic void nvme_abort_command(struct nvme_queue *nvmeq, int cmdid) 7823c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 7833c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 784c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cancel_cmdid(nvmeq, cmdid, NULL); 7853c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 7863c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 7873c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 788c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstruct sync_cmd_info { 789c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct task_struct *task; 790c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox u32 result; 791c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox int status; 792c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox}; 793c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 7945c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void sync_completion(struct nvme_dev *dev, void *ctx, 795c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 796c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 797c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct sync_cmd_info *cmdinfo = ctx; 798c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->result = le32_to_cpup(&cqe->result); 799c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 800c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox wake_up_process(cmdinfo->task); 801c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 802c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 803b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 804b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Returns 0 on success. If the result is negative, it's a Linux error code; 805b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * if the result is positive, it's an NVM Express status code 806b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 8075d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_sync_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd, 8085d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma u32 *result, unsigned timeout) 809b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 810b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 811b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct sync_cmd_info cmdinfo; 812b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 813b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.task = current; 814b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.status = -EINTR; 815b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 816c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdid = alloc_cmdid_killable(nvmeq, &cmdinfo, sync_completion, 817e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox timeout); 818b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid < 0) 819b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 820b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmd->common.command_id = cmdid; 821b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8223c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox set_current_state(TASK_KILLABLE); 8233c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_submit_cmd(nvmeq, cmd); 82478f8d2577bd79ce9d62f4d9e6d3b895bd1dd1d1dKeith Busch schedule_timeout(timeout); 825b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8263c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox if (cmdinfo.status == -EINTR) { 8273c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_abort_command(nvmeq, cmdid); 8283c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox return -EINTR; 8293c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox } 8303c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 831b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 832b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox *result = cmdinfo.result; 833b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 834b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdinfo.status; 835b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 836b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8374d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_submit_async_cmd(struct nvme_queue *nvmeq, 8384d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_command *cmd, 8394d115420707afcabe77d2535e092356df6664b70Keith Busch struct async_cmd_info *cmdinfo, unsigned timeout) 8404d115420707afcabe77d2535e092356df6664b70Keith Busch{ 8414d115420707afcabe77d2535e092356df6664b70Keith Busch int cmdid; 8424d115420707afcabe77d2535e092356df6664b70Keith Busch 8434d115420707afcabe77d2535e092356df6664b70Keith Busch cmdid = alloc_cmdid_killable(nvmeq, cmdinfo, async_completion, timeout); 8444d115420707afcabe77d2535e092356df6664b70Keith Busch if (cmdid < 0) 8454d115420707afcabe77d2535e092356df6664b70Keith Busch return cmdid; 8464d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo->status = -EINTR; 8474d115420707afcabe77d2535e092356df6664b70Keith Busch cmd->common.command_id = cmdid; 8484d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_submit_cmd(nvmeq, cmd); 8494d115420707afcabe77d2535e092356df6664b70Keith Busch return 0; 8504d115420707afcabe77d2535e092356df6664b70Keith Busch} 8514d115420707afcabe77d2535e092356df6664b70Keith Busch 8525d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, 853b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 *result) 854b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 855e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return nvme_submit_sync_cmd(dev->queues[0], cmd, result, ADMIN_TIMEOUT); 856b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 857b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8584d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_submit_admin_cmd_async(struct nvme_dev *dev, 8594d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_command *cmd, struct async_cmd_info *cmdinfo) 8604d115420707afcabe77d2535e092356df6664b70Keith Busch{ 8614d115420707afcabe77d2535e092356df6664b70Keith Busch return nvme_submit_async_cmd(dev->queues[0], cmd, cmdinfo, 8624d115420707afcabe77d2535e092356df6664b70Keith Busch ADMIN_TIMEOUT); 8634d115420707afcabe77d2535e092356df6664b70Keith Busch} 8644d115420707afcabe77d2535e092356df6664b70Keith Busch 865b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 866b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 867b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 868b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 869b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 870b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 871b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.opcode = opcode; 872b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.qid = cpu_to_le16(id); 873b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 874b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 875b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 876b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 877b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 878b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 879b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 880b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 881b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 882b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 883b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 884b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 885b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 886b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 887b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 888b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.opcode = nvme_admin_create_cq; 889b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 890b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cqid = cpu_to_le16(qid); 891b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 892b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cq_flags = cpu_to_le16(flags); 893b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 894b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 895b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 896b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 897b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 898b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 900b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 901b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 902b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 903b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 904b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 905b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 906b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 907b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 908b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 909b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.opcode = nvme_admin_create_sq; 910b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 911b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sqid = cpu_to_le16(qid); 912b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 913b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sq_flags = cpu_to_le16(flags); 914b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.cqid = cpu_to_le16(qid); 915b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 916b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 917b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 918b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 919b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 920b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 921b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 922b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 923b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 924b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 925b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 926b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 927b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 928b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 929b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 930b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 931b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9325d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns, 933bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox dma_addr_t dma_addr) 934bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 935bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 936bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 937bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 938bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.opcode = nvme_admin_identify; 939bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.nsid = cpu_to_le32(nsid); 940bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.prp1 = cpu_to_le64(dma_addr); 941bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.cns = cpu_to_le32(cns); 942bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 943bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, NULL); 944bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 945bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 9465d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid, 94708df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr_t dma_addr, u32 *result) 948bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 949bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 950bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 951bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 952bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.opcode = nvme_admin_get_features; 953a42ceccef0c43b46ff6bc1b12a7c1076ef243df1Keith Busch c.features.nsid = cpu_to_le32(nsid); 954bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 955bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.fid = cpu_to_le32(fid); 956bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 95708df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch return nvme_submit_admin_cmd(dev, &c, result); 958df3481399042200792822b6243e36a95a557b57eMatthew Wilcox} 959df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 9605d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11, 9615d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma dma_addr_t dma_addr, u32 *result) 962df3481399042200792822b6243e36a95a557b57eMatthew Wilcox{ 963df3481399042200792822b6243e36a95a557b57eMatthew Wilcox struct nvme_command c; 964df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 965df3481399042200792822b6243e36a95a557b57eMatthew Wilcox memset(&c, 0, sizeof(c)); 966df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.opcode = nvme_admin_set_features; 967df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 968df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.fid = cpu_to_le32(fid); 969df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.dword11 = cpu_to_le32(dword11); 970df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 971bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, result); 972bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 973bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 974a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox/** 975c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * nvme_abort_cmd - Attempt aborting a command 976c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * @cmdid: Command id of a timed out IO 977c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * @queue: The queue with timed out IO 978c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * 979c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * Schedule controller reset if the command was already aborted once before and 980c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * still hasn't been returned to the driver, or if this is the admin queue. 981c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch */ 982c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Buschstatic void nvme_abort_cmd(int cmdid, struct nvme_queue *nvmeq) 983c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch{ 984c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch int a_cmdid; 985c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch struct nvme_command cmd; 986c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch struct nvme_dev *dev = nvmeq->dev; 987c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 988c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 989c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (!nvmeq->qid || info[cmdid].aborted) { 990c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (work_busy(&dev->reset_work)) 991c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 992c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch list_del_init(&dev->node); 993c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev_warn(&dev->pci_dev->dev, 994c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch "I/O %d QID %d timeout, reset controller\n", cmdid, 995c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid); 996bdfd70fde389412be60f7e8aaed5732dc26fc8acMatthew Wilcox PREPARE_WORK(&dev->reset_work, nvme_reset_failed_dev); 997c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch queue_work(nvme_workq, &dev->reset_work); 998c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 999c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch } 1000c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1001c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (!dev->abort_limit) 1002c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1003c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1004c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch a_cmdid = alloc_cmdid(dev->queues[0], CMD_CTX_ABORT, special_completion, 1005c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch ADMIN_TIMEOUT); 1006c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (a_cmdid < 0) 1007c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1008c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1009c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch memset(&cmd, 0, sizeof(cmd)); 1010c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.opcode = nvme_admin_abort_cmd; 1011c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.cid = cmdid; 1012c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.sqid = cpu_to_le16(nvmeq->qid); 1013c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.command_id = a_cmdid; 1014c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1015c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch --dev->abort_limit; 1016c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch info[cmdid].aborted = 1; 1017c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch info[cmdid].timeout = jiffies + ADMIN_TIMEOUT; 1018c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1019c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev_warn(nvmeq->q_dmadev, "Aborting I/O %d QID %d\n", cmdid, 1020c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid); 1021c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvme_submit_cmd(dev->queues[0], &cmd); 1022c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch} 1023c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1024c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch/** 1025a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * nvme_cancel_ios - Cancel outstanding I/Os 1026a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @queue: The queue to cancel I/Os on 1027a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @timeout: True to only cancel I/Os which have timed out 1028a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox */ 1029a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcoxstatic void nvme_cancel_ios(struct nvme_queue *nvmeq, bool timeout) 1030a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox{ 1031a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int depth = nvmeq->q_depth - 1; 1032a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 1033a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox unsigned long now = jiffies; 1034a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int cmdid; 1035a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1036a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox for_each_set_bit(cmdid, nvmeq->cmdid_data, depth) { 1037a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox void *ctx; 1038a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_completion_fn fn; 1039a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox static struct nvme_completion cqe = { 1040af2d9ca744af5e03390eeb3864d08ce75c860899Matthew Wilcox .status = cpu_to_le16(NVME_SC_ABORT_REQ << 1), 1041a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox }; 1042a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1043a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox if (timeout && !time_after(now, info[cmdid].timeout)) 1044a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox continue; 1045053ab702cc2702f25a97ead087ed344b864785b7Keith Busch if (info[cmdid].ctx == CMD_CTX_CANCELLED) 1046053ab702cc2702f25a97ead087ed344b864785b7Keith Busch continue; 1047c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (timeout && nvmeq->dev->initialized) { 1048c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvme_abort_cmd(cmdid, nvmeq); 1049c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch continue; 1050c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch } 1051c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d QID %d\n", cmdid, 1052c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid); 1053a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox ctx = cancel_cmdid(nvmeq, cmdid, &fn); 1054a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox fn(nvmeq->dev, ctx, &cqe); 1055a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox } 1056a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox} 1057a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1058224042742582c9938788b81165180c876e997a07Keith Buschstatic void nvme_free_queue(struct nvme_queue *nvmeq) 10599e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox{ 1060224042742582c9938788b81165180c876e997a07Keith Busch spin_lock_irq(&nvmeq->q_lock); 1061224042742582c9938788b81165180c876e997a07Keith Busch while (bio_list_peek(&nvmeq->sq_cong)) { 1062224042742582c9938788b81165180c876e997a07Keith Busch struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 1063224042742582c9938788b81165180c876e997a07Keith Busch bio_endio(bio, -EIO); 1064224042742582c9938788b81165180c876e997a07Keith Busch } 1065224042742582c9938788b81165180c876e997a07Keith Busch spin_unlock_irq(&nvmeq->q_lock); 1066224042742582c9938788b81165180c876e997a07Keith Busch 10679e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 10689e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 10699e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 10709e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 10719e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox kfree(nvmeq); 10729e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox} 10739e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 1074a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Buschstatic void nvme_free_queues(struct nvme_dev *dev, int lowest) 1075224042742582c9938788b81165180c876e997a07Keith Busch{ 1076224042742582c9938788b81165180c876e997a07Keith Busch int i; 1077224042742582c9938788b81165180c876e997a07Keith Busch 1078a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch for (i = dev->queue_count - 1; i >= lowest; i--) { 1079224042742582c9938788b81165180c876e997a07Keith Busch nvme_free_queue(dev->queues[i]); 1080224042742582c9938788b81165180c876e997a07Keith Busch dev->queue_count--; 1081224042742582c9938788b81165180c876e997a07Keith Busch dev->queues[i] = NULL; 1082224042742582c9938788b81165180c876e997a07Keith Busch } 1083224042742582c9938788b81165180c876e997a07Keith Busch} 1084224042742582c9938788b81165180c876e997a07Keith Busch 10854d115420707afcabe77d2535e092356df6664b70Keith Busch/** 10864d115420707afcabe77d2535e092356df6664b70Keith Busch * nvme_suspend_queue - put queue into suspended state 10874d115420707afcabe77d2535e092356df6664b70Keith Busch * @nvmeq - queue to suspend 10884d115420707afcabe77d2535e092356df6664b70Keith Busch * 10894d115420707afcabe77d2535e092356df6664b70Keith Busch * Returns 1 if already suspended, 0 otherwise. 10904d115420707afcabe77d2535e092356df6664b70Keith Busch */ 10914d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_suspend_queue(struct nvme_queue *nvmeq) 1092b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 10934d115420707afcabe77d2535e092356df6664b70Keith Busch int vector = nvmeq->dev->entry[nvmeq->cq_vector].vector; 1094b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1095a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1096224042742582c9938788b81165180c876e997a07Keith Busch if (nvmeq->q_suspended) { 1097224042742582c9938788b81165180c876e997a07Keith Busch spin_unlock_irq(&nvmeq->q_lock); 10984d115420707afcabe77d2535e092356df6664b70Keith Busch return 1; 10993295874b6074d749516d6decd43afad7bf6e38ffKeith Busch } 1100224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->q_suspended = 1; 1101a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1102a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1103aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox irq_set_affinity_hint(vector, NULL); 1104aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox free_irq(vector, nvmeq); 1105b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11064d115420707afcabe77d2535e092356df6664b70Keith Busch return 0; 11074d115420707afcabe77d2535e092356df6664b70Keith Busch} 1108b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11094d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_clear_queue(struct nvme_queue *nvmeq) 11104d115420707afcabe77d2535e092356df6664b70Keith Busch{ 1111224042742582c9938788b81165180c876e997a07Keith Busch spin_lock_irq(&nvmeq->q_lock); 1112224042742582c9938788b81165180c876e997a07Keith Busch nvme_process_cq(nvmeq); 1113224042742582c9938788b81165180c876e997a07Keith Busch nvme_cancel_ios(nvmeq, false); 1114224042742582c9938788b81165180c876e997a07Keith Busch spin_unlock_irq(&nvmeq->q_lock); 1115b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1116b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11174d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_disable_queue(struct nvme_dev *dev, int qid) 11184d115420707afcabe77d2535e092356df6664b70Keith Busch{ 11194d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = dev->queues[qid]; 11204d115420707afcabe77d2535e092356df6664b70Keith Busch 11214d115420707afcabe77d2535e092356df6664b70Keith Busch if (!nvmeq) 11224d115420707afcabe77d2535e092356df6664b70Keith Busch return; 11234d115420707afcabe77d2535e092356df6664b70Keith Busch if (nvme_suspend_queue(nvmeq)) 11244d115420707afcabe77d2535e092356df6664b70Keith Busch return; 11254d115420707afcabe77d2535e092356df6664b70Keith Busch 11260e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch /* Don't tell the adapter to delete the admin queue. 11270e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch * Don't tell a removed adapter to delete IO queues. */ 11280e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch if (qid && readl(&dev->bar->csts) != -1) { 1129b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1130b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1131b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 11324d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_clear_queue(nvmeq); 1133b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1134b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1135b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 1136b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int depth, int vector) 1137b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1138b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1139224042742582c9938788b81165180c876e997a07Keith Busch unsigned extra = nvme_queue_extra(depth); 1140b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq) + extra, GFP_KERNEL); 1141b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq) 1142b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1143b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1144b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cqes = dma_alloc_coherent(dmadev, CQ_SIZE(depth), 1145b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->cq_dma_addr, GFP_KERNEL); 1146b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->cqes) 1147b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 1148b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset((void *)nvmeq->cqes, 0, CQ_SIZE(depth)); 1149b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1150b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds = dma_alloc_coherent(dmadev, SQ_SIZE(depth), 1151b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->sq_dma_addr, GFP_KERNEL); 1152b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->sq_cmds) 1153b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_cqdma; 1154b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1155b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_dmadev = dmadev; 1156091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvmeq->dev = dev; 11573193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox snprintf(nvmeq->irqname, sizeof(nvmeq->irqname), "nvme%dq%d", 11583193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox dev->instance, qid); 1159b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_init(&nvmeq->q_lock); 1160b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = 0; 1161821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = 1; 1162b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox init_waitqueue_head(&nvmeq->sq_full); 11631fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox init_waitqueue_entry(&nvmeq->sq_cong_wait, nvme_thread); 1164b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_init(&nvmeq->sq_cong); 1165b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 1166b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_depth = depth; 1167b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_vector = vector; 1168c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid = qid; 1169224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->q_suspended = 1; 1170224042742582c9938788b81165180c876e997a07Keith Busch dev->queue_count++; 1171b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1172b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 1173b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1174b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_cqdma: 117568b8eca5f882230e4991df0db0a3094f49420a90Keith Busch dma_free_coherent(dmadev, CQ_SIZE(depth), (void *)nvmeq->cqes, 1176b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_dma_addr); 1177b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 1178b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 1179b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1180b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1181b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11823001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcoxstatic int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 11833001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox const char *name) 11843001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox{ 118558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if (use_threaded_interrupts) 118658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 1187481e5bad84239b01415b888df2040c1860ae3cfdMichael Opdenacker nvme_irq_check, nvme_irq, IRQF_SHARED, 118858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox name, nvmeq); 11893001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 1190481e5bad84239b01415b888df2040c1860ae3cfdMichael Opdenacker IRQF_SHARED, name, nvmeq); 11913001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox} 11923001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox 1193224042742582c9938788b81165180c876e997a07Keith Buschstatic void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) 1194b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1195224042742582c9938788b81165180c876e997a07Keith Busch struct nvme_dev *dev = nvmeq->dev; 1196224042742582c9938788b81165180c876e997a07Keith Busch unsigned extra = nvme_queue_extra(nvmeq->q_depth); 1197b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1198224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->sq_tail = 0; 1199224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->cq_head = 0; 1200224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->cq_phase = 1; 1201b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 1202224042742582c9938788b81165180c876e997a07Keith Busch memset(nvmeq->cmdid_data, 0, extra); 1203224042742582c9938788b81165180c876e997a07Keith Busch memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); 1204224042742582c9938788b81165180c876e997a07Keith Busch nvme_cancel_ios(nvmeq, false); 1205224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->q_suspended = 0; 1206224042742582c9938788b81165180c876e997a07Keith Busch} 1207224042742582c9938788b81165180c876e997a07Keith Busch 1208224042742582c9938788b81165180c876e997a07Keith Buschstatic int nvme_create_queue(struct nvme_queue *nvmeq, int qid) 1209224042742582c9938788b81165180c876e997a07Keith Busch{ 1210224042742582c9938788b81165180c876e997a07Keith Busch struct nvme_dev *dev = nvmeq->dev; 1211224042742582c9938788b81165180c876e997a07Keith Busch int result; 12123f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox 1213b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_cq(dev, qid, nvmeq); 1214b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1215224042742582c9938788b81165180c876e997a07Keith Busch return result; 1216b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1217b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_sq(dev, qid, nvmeq); 1218b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1219b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_cq; 1220b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12213193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox result = queue_request_irq(dev, nvmeq, nvmeq->irqname); 1222b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1223b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_sq; 1224b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12250a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1226224042742582c9938788b81165180c876e997a07Keith Busch nvme_init_queue(nvmeq, qid); 12270a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1228224042742582c9938788b81165180c876e997a07Keith Busch 1229224042742582c9938788b81165180c876e997a07Keith Busch return result; 1230b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1231b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_sq: 1232b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1233b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_cq: 1234b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1235224042742582c9938788b81165180c876e997a07Keith Busch return result; 1236b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1237b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1238ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_wait_ready(struct nvme_dev *dev, u64 cap, bool enabled) 1239ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 1240ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox unsigned long timeout; 1241ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox u32 bit = enabled ? NVME_CSTS_RDY : 0; 1242ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1243ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; 1244ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1245ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox while ((readl(&dev->bar->csts) & NVME_CSTS_RDY) != bit) { 1246ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox msleep(100); 1247ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (fatal_signal_pending(current)) 1248ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return -EINTR; 1249ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (time_after(jiffies, timeout)) { 1250ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox dev_err(&dev->pci_dev->dev, 1251ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox "Device not ready; aborting initialisation\n"); 1252ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return -ENODEV; 1253ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox } 1254ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox } 1255ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1256ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return 0; 1257ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1258ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1259ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox/* 1260ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * If the device has been passed off to us in an enabled state, just clear 1261ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * the enabled bit. The spec says we should set the 'shutdown notification 1262ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * bits', but doing so may cause the device to complete commands to the 1263ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * admin queue ... and we don't know what memory that might be pointing at! 1264ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox */ 1265ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_disable_ctrl(struct nvme_dev *dev, u64 cap) 1266ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 126744af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox u32 cc = readl(&dev->bar->cc); 126844af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox 126944af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox if (cc & NVME_CC_ENABLE) 127044af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox writel(cc & ~NVME_CC_ENABLE, &dev->bar->cc); 1271ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return nvme_wait_ready(dev, cap, false); 1272ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1273ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1274ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap) 1275ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 1276ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return nvme_wait_ready(dev, cap, true); 1277ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1278ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 12791894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Buschstatic int nvme_shutdown_ctrl(struct nvme_dev *dev) 12801894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch{ 12811894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch unsigned long timeout; 12821894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch u32 cc; 12831894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 12841894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch cc = (readl(&dev->bar->cc) & ~NVME_CC_SHN_MASK) | NVME_CC_SHN_NORMAL; 12851894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch writel(cc, &dev->bar->cc); 12861894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 12871894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch timeout = 2 * HZ + jiffies; 12881894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch while ((readl(&dev->bar->csts) & NVME_CSTS_SHST_MASK) != 12891894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch NVME_CSTS_SHST_CMPLT) { 12901894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch msleep(100); 12911894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch if (fatal_signal_pending(current)) 12921894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch return -EINTR; 12931894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch if (time_after(jiffies, timeout)) { 12941894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch dev_err(&dev->pci_dev->dev, 12951894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch "Device shutdown incomplete; abort shutdown\n"); 12961894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch return -ENODEV; 12971894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch } 12981894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch } 12991894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 13001894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch return 0; 13011894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch} 13021894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 13038d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_configure_admin_queue(struct nvme_dev *dev) 1304b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1305ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox int result; 1306b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 aqa; 1307ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox u64 cap = readq(&dev->bar->cap); 1308b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq; 1309b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1310ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox result = nvme_disable_ctrl(dev, cap); 1311ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (result < 0) 1312ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return result; 1313b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1314cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvmeq = dev->queues[0]; 1315cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch if (!nvmeq) { 1316cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvmeq = nvme_alloc_queue(dev, 0, 64, 0); 1317cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch if (!nvmeq) 1318cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return -ENOMEM; 1319cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch dev->queues[0] = nvmeq; 1320cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch } 1321b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1322b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa = nvmeq->q_depth - 1; 1323b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa |= aqa << 16; 1324b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1325b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config = NVME_CC_ENABLE | NVME_CC_CSS_NVM; 1326b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= (PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; 1327b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; 13287f53f9d2424533256ae86f7df5661a17de743de8Matthew Wilcox dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; 1329b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1330b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(aqa, &dev->bar->aqa); 1331b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->sq_dma_addr, &dev->bar->asq); 1332b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->cq_dma_addr, &dev->bar->acq); 1333b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(dev->ctrl_config, &dev->bar->cc); 1334b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1335ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox result = nvme_enable_ctrl(dev, cap); 1336025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1337cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return result; 13389e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 13393193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox result = queue_request_irq(dev, nvmeq, nvmeq->irqname); 1340025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1341cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return result; 1342025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch 13430a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1344224042742582c9938788b81165180c876e997a07Keith Busch nvme_init_queue(nvmeq, 0); 13450a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1346b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1347b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1348b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 13495d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermastruct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, 1350eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned long addr, unsigned length) 1351b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 135236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox int i, err, count, nents, offset; 13537fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct scatterlist *sg; 13547fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct page **pages; 1355eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 135636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 135736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (addr & 3) 1358eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 13595460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter if (!length || length > INT_MAX - PAGE_SIZE) 1360eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 13617fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 136236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox offset = offset_in_page(addr); 13637fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox count = DIV_ROUND_UP(offset + length, PAGE_SIZE); 13647fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox pages = kcalloc(count, sizeof(*pages), GFP_KERNEL); 136522fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter if (!pages) 136622fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter return ERR_PTR(-ENOMEM); 136736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 136836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = get_user_pages_fast(addr, count, 1, pages); 136936c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (err < count) { 137036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox count = err; 137136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = -EFAULT; 137236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox goto put_pages; 137336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox } 13747fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 1375eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(count, length, GFP_KERNEL); 1376eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = iod->sg; 137736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox sg_init_table(sg, count); 1378d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox for (i = 0; i < count; i++) { 1379d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox sg_set_page(&sg[i], pages[i], 13805460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter min_t(unsigned, length, PAGE_SIZE - offset), 13815460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter offset); 1382d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox length -= (PAGE_SIZE - offset); 1383d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox offset = 0; 13847fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox } 1385fe304c43c6d63e29ed4fc46a874d7a74313788c5Matthew Wilcox sg_mark_end(&sg[i - 1]); 13861c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox iod->nents = count; 13877fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 13887fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox err = -ENOMEM; 13897fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox nents = dma_map_sg(&dev->pci_dev->dev, sg, count, 13907fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 139136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (!nents) 1392eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 1393b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 13947fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1395eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 1396b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1397eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 1398eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 13997fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_pages: 14007fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox for (i = 0; i < count; i++) 14017fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_page(pages[i]); 14027fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1403eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(err); 14047fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1405b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14065d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_unmap_user_pages(struct nvme_dev *dev, int write, 14071c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox struct nvme_iod *iod) 14087fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox{ 14091c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox int i; 1410b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14111c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 14121c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 14137fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 14141c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox for (i = 0; i < iod->nents; i++) 14151c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox put_page(sg_page(&iod->sg[i])); 14167fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1417b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1418a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcoxstatic int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) 1419a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox{ 1420a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_dev *dev = ns->dev; 1421a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_queue *nvmeq; 1422a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_user_io io; 1423a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_command c; 1424f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch unsigned length, meta_len; 1425f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int status, i; 1426f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch struct nvme_iod *iod, *meta_iod = NULL; 1427f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch dma_addr_t meta_dma_addr; 1428f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch void *meta, *uninitialized_var(meta_mem); 1429a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1430a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox if (copy_from_user(&io, uio, sizeof(io))) 1431a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return -EFAULT; 14326c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox length = (io.nblocks + 1) << ns->lba_shift; 1433f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_len = (io.nblocks + 1) * ns->ms; 1434f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1435f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len && ((io.metadata & 3) || !io.metadata)) 1436f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch return -EINVAL; 14376c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 14386c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox switch (io.opcode) { 14396c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_write: 14406c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_read: 14416bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case nvme_cmd_compare: 1442eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_map_user_pages(dev, io.opcode & 1, io.addr, length); 14436413214c5d424fd5aae6567848340f962ad2ce0fMatthew Wilcox break; 14446c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox default: 14456bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EINVAL; 14466c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox } 14476c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 1448eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1449eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1450a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1451a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox memset(&c, 0, sizeof(c)); 1452a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.opcode = io.opcode; 1453a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.flags = io.flags; 14546c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.nsid = cpu_to_le32(ns->ns_id); 1455a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.slba = cpu_to_le64(io.slba); 14566c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.length = cpu_to_le16(io.nblocks); 1457a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.control = cpu_to_le16(io.control); 14581c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); 14591c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.reftag = cpu_to_le32(io.reftag); 14601c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.apptag = cpu_to_le16(io.apptag); 14611c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.appmask = cpu_to_le16(io.appmask); 1462f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1463f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len) { 14641b56749e541ad59068582f2a28297843e243b856Keith Busch meta_iod = nvme_map_user_pages(dev, io.opcode & 1, io.metadata, 14651b56749e541ad59068582f2a28297843e243b856Keith Busch meta_len); 1466f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (IS_ERR(meta_iod)) { 1467f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch status = PTR_ERR(meta_iod); 1468f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod = NULL; 1469f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch goto unmap; 1470f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1471f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1472f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_mem = dma_alloc_coherent(&dev->pci_dev->dev, meta_len, 1473f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch &meta_dma_addr, GFP_KERNEL); 1474f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (!meta_mem) { 1475f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch status = -ENOMEM; 1476f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch goto unmap; 1477f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1478f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1479f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (io.opcode & 1) { 1480f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int meta_offset = 0; 1481f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1482f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch for (i = 0; i < meta_iod->nents; i++) { 1483f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + 1484f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].offset; 1485f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch memcpy(meta_mem + meta_offset, meta, 1486f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].length); 1487f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch kunmap_atomic(meta); 1488f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_offset += meta_iod->sg[i].length; 1489f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1490f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1491f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1492f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch c.rw.metadata = cpu_to_le64(meta_dma_addr); 1493f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1494f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1495eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, GFP_KERNEL); 1496a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1497040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox nvmeq = get_nvmeq(dev); 1498fa92282149842645931580225647238428374758Matthew Wilcox /* 1499fa92282149842645931580225647238428374758Matthew Wilcox * Since nvme_submit_sync_cmd sleeps, we can't keep preemption 1500b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * disabled. We may be preempted at any point, and be rescheduled 1501b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * to a different CPU. That will cause cacheline bouncing, but no 1502b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * additional races since q_lock already protects against other CPUs. 1503b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox */ 1504a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox put_nvmeq(nvmeq); 1505b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (length != (io.nblocks + 1) << ns->lba_shift) 1506b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1507224042742582c9938788b81165180c876e997a07Keith Busch else if (!nvmeq || nvmeq->q_suspended) 1508224042742582c9938788b81165180c876e997a07Keith Busch status = -EBUSY; 1509b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1510ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox status = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT); 1511a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1512f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len) { 1513f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (status == NVME_SC_SUCCESS && !(io.opcode & 1)) { 1514f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int meta_offset = 0; 1515f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1516f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch for (i = 0; i < meta_iod->nents; i++) { 1517f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + 1518f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].offset; 1519f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch memcpy(meta, meta_mem + meta_offset, 1520f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].length); 1521f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch kunmap_atomic(meta); 1522f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_offset += meta_iod->sg[i].length; 1523f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1524f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1525f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1526f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch dma_free_coherent(&dev->pci_dev->dev, meta_len, meta_mem, 1527f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_dma_addr); 1528f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1529f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1530f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch unmap: 15311c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, io.opcode & 1, iod); 1532eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 1533f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1534f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_iod) { 1535f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch nvme_unmap_user_pages(dev, io.opcode & 1, meta_iod); 1536f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch nvme_free_iod(dev, meta_iod); 1537f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1538f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1539a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return status; 1540a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox} 1541a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 154250af8baec46a99a9b81a4600c0374f83a5a590a9Keith Buschstatic int nvme_user_admin_cmd(struct nvme_dev *dev, 15436bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd __user *ucmd) 15446ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox{ 15456bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd cmd; 15466ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox struct nvme_command c; 1547eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status, length; 1548c7d36ab8fa04c213328119a9c0d66985fe204ee5Keith Busch struct nvme_iod *uninitialized_var(iod); 154994f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch unsigned timeout; 15506ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 15516bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (!capable(CAP_SYS_ADMIN)) 15526bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EACCES; 15536bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (copy_from_user(&cmd, ucmd, sizeof(cmd))) 15546ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return -EFAULT; 15556ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 15566ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox memset(&c, 0, sizeof(c)); 15576bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.opcode = cmd.opcode; 15586bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.flags = cmd.flags; 15596bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.nsid = cpu_to_le32(cmd.nsid); 15606bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); 15616bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); 15626bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); 15636bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); 15646bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); 15656bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); 15666bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); 15676bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); 15686bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 15696bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox length = cmd.data_len; 15706bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 1571497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox iod = nvme_map_user_pages(dev, cmd.opcode & 1, cmd.addr, 1572497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox length); 1573eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1574eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1575eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, 1576eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_KERNEL); 15776bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 15786bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 157994f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch timeout = cmd.timeout_ms ? msecs_to_jiffies(cmd.timeout_ms) : 158094f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch ADMIN_TIMEOUT; 15816bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (length != cmd.data_len) 1582b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1583b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 158494f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch status = nvme_submit_sync_cmd(dev->queues[0], &c, &cmd.result, 158594f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch timeout); 1586eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 15876bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 15881c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, cmd.opcode & 1, iod); 1589eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 15906bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 1591f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 1592cf90bc4830b858487fe4b9b9ecd0031e23ca3e83Chayan Biswas if ((status >= 0) && copy_to_user(&ucmd->result, &cmd.result, 1593f4f117f64baf8840d22266d518227b2a186d294bKeith Busch sizeof(cmd.result))) 1594f4f117f64baf8840d22266d518227b2a186d294bKeith Busch status = -EFAULT; 1595f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 15966ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return status; 15976ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox} 15986ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 1599b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 1600b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long arg) 1601b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1602b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = bdev->bd_disk->private_data; 1603b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1604b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox switch (cmd) { 16056bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ID: 1606c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox force_successful_syscall_return(); 16076bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return ns->ns_id; 16086bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ADMIN_CMD: 160950af8baec46a99a9b81a4600c0374f83a5a590a9Keith Busch return nvme_user_admin_cmd(ns->dev, (void __user *)arg); 1610a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox case NVME_IOCTL_SUBMIT_IO: 1611a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return nvme_submit_io(ns, (void __user *)arg); 16125d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_GET_VERSION_NUM: 16135d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_get_version_num((void __user *)arg); 16145d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_IO: 16155d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_io(ns, (void __user *)arg); 1616b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox default: 1617b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOTTY; 1618b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1619b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1620b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1621320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#ifdef CONFIG_COMPAT 1622320a382746e0ab1304476ea7e986a8d416ab99dbKeith Buschstatic int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, 1623320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch unsigned int cmd, unsigned long arg) 1624320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch{ 1625320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch struct nvme_ns *ns = bdev->bd_disk->private_data; 1626320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch 1627320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch switch (cmd) { 1628320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch case SG_IO: 1629320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch return nvme_sg_io32(ns, arg); 1630320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch } 1631320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch return nvme_ioctl(bdev, mode, cmd, arg); 1632320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch} 1633320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#else 1634320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#define nvme_compat_ioctl NULL 1635320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#endif 1636320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch 16379ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Buschstatic int nvme_open(struct block_device *bdev, fmode_t mode) 16389ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch{ 16399ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_ns *ns = bdev->bd_disk->private_data; 16409ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_dev *dev = ns->dev; 16419ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 16429ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch kref_get(&dev->kref); 16439ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch return 0; 16449ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch} 16459ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 16469ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Buschstatic void nvme_free_dev(struct kref *kref); 16479ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 16489ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Buschstatic void nvme_release(struct gendisk *disk, fmode_t mode) 16499ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch{ 16509ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_ns *ns = disk->private_data; 16519ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_dev *dev = ns->dev; 16529ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 16539ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch kref_put(&dev->kref, nvme_free_dev); 16549ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch} 16559ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 1656b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic const struct block_device_operations nvme_fops = { 1657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .owner = THIS_MODULE, 1658b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .ioctl = nvme_ioctl, 1659320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch .compat_ioctl = nvme_compat_ioctl, 16609ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch .open = nvme_open, 16619ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch .release = nvme_release, 1662b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1663b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16641fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic void nvme_resubmit_bios(struct nvme_queue *nvmeq) 16651fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 16661fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (bio_list_peek(&nvmeq->sq_cong)) { 16671fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 16681fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data; 1669427e97080196548557b288517537ab7eb48c309fKeith Busch 1670427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 1671427e97080196548557b288517537ab7eb48c309fKeith Busch remove_wait_queue(&nvmeq->sq_full, 1672427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 16731fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_submit_bio_queue(nvmeq, ns, bio)) { 1674427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 1675427e97080196548557b288517537ab7eb48c309fKeith Busch add_wait_queue(&nvmeq->sq_full, 1676427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 16771fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox bio_list_add_head(&nvmeq->sq_cong, bio); 16781fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox break; 16791fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 16801fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 16811fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 16821fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 16831fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic int nvme_kthread(void *data) 16841fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 1685d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch struct nvme_dev *dev, *next; 16861fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 16871fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (!kthread_should_stop()) { 1688564a232c059913d91b491e04c2b2d670b8f94615Arjan van de Ven set_current_state(TASK_INTERRUPTIBLE); 16891fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 1690d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch list_for_each_entry_safe(dev, next, &dev_list, node) { 16911fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox int i; 1692d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch if (readl(&dev->bar->csts) & NVME_CSTS_CFS && 1693d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized) { 1694d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch if (work_busy(&dev->reset_work)) 1695d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch continue; 1696d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch list_del_init(&dev->node); 1697d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev_warn(&dev->pci_dev->dev, 1698d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch "Failed status, reset controller\n"); 1699bdfd70fde389412be60f7e8aaed5732dc26fc8acMatthew Wilcox PREPARE_WORK(&dev->reset_work, 1700d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch nvme_reset_failed_dev); 1701d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch queue_work(nvme_workq, &dev->reset_work); 1702d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch continue; 1703d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch } 17041fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox for (i = 0; i < dev->queue_count; i++) { 17051fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_queue *nvmeq = dev->queues[i]; 1706740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (!nvmeq) 1707740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox continue; 17081fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1709224042742582c9938788b81165180c876e997a07Keith Busch if (nvmeq->q_suspended) 1710224042742582c9938788b81165180c876e997a07Keith Busch goto unlock; 1711bc57a0f7a44cfcf3e9873f6c6b8dcecdca486b1fMatthew Wilcox nvme_process_cq(nvmeq); 1712a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_cancel_ios(nvmeq, true); 17131fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_resubmit_bios(nvmeq); 1714224042742582c9938788b81165180c876e997a07Keith Busch unlock: 17151fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 17161fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 17171fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 17181fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 1719acb7aa0db09b8abd38abeb84334a8a27a52fbb1bArjan van de Ven schedule_timeout(round_jiffies_relative(HZ)); 17201fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 17211fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 17221fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 17231fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 17240e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic void nvme_config_discard(struct nvme_ns *ns) 17250e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 17260e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch u32 logical_block_size = queue_logical_block_size(ns->queue); 17270e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_zeroes_data = 0; 17280e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_alignment = logical_block_size; 17290e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_granularity = logical_block_size; 17300e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.max_discard_sectors = 0xffffffff; 17310e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); 17320e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 17330e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 1734c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcoxstatic struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid, 1735b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_id_ns *id, struct nvme_lba_range_type *rt) 1736b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1737b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns; 1738b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct gendisk *disk; 1739b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int lbaf; 1740b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1741b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (rt->attributes & NVME_LBART_ATTRIB_HIDE) 1742b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1743b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1744b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns = kzalloc(sizeof(*ns), GFP_KERNEL); 1745b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns) 1746b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1747b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue = blk_alloc_queue(GFP_KERNEL); 1748b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns->queue) 1749b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_ns; 17504eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox ns->queue->queue_flags = QUEUE_FLAG_DEFAULT; 17514eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); 17524eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); 1753b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_queue_make_request(ns->queue, nvme_make_request); 1754b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->dev = dev; 1755b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue->queuedata = ns; 1756b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1757469071a37afc8a627b6b2ddf29db0a097d864845Matthew Wilcox disk = alloc_disk(0); 1758b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!disk) 1759b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_queue; 17605aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ns->ns_id = nsid; 1761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->disk = disk; 1762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox lbaf = id->flbas & 0xf; 1763b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->lba_shift = id->lbaf[lbaf].ds; 1764f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); 1765e9ef46369f5107e634a93b7fc4e62a1f53343197Keith Busch blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); 17668fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch if (dev->max_hw_sectors) 17678fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); 1768b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1769b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->major = nvme_major; 1770469071a37afc8a627b6b2ddf29db0a097d864845Matthew Wilcox disk->first_minor = 0; 1771b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->fops = &nvme_fops; 1772b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->private_data = ns; 1773b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->queue = ns->queue; 1774388f037f4e7f0a24bac6b1a24f144f5d939f58cfMatthew Wilcox disk->driverfs_dev = &dev->pci_dev->dev; 1775469071a37afc8a627b6b2ddf29db0a097d864845Matthew Wilcox disk->flags = GENHD_FL_EXT_DEVT; 17765aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); 1777b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); 1778b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17790e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (dev->oncs & NVME_CTRL_ONCS_DSM) 17800e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvme_config_discard(ns); 17810e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 1782b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return ns; 1783b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1784b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_queue: 1785b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1786b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_ns: 1787b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1788b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1789b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1790b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1791b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcoxstatic int set_queue_count(struct nvme_dev *dev, int count) 1792b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1793b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 1794b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 result; 1795b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcox u32 q_count = (count - 1) | ((count - 1) << 16); 1796b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1797df3481399042200792822b6243e36a95a557b57eMatthew Wilcox status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, 1798bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox &result); 1799b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 18007e03b124065507e72008ef294c30001eca74a031Keith Busch return status < 0 ? -EIO : -EBUSY; 1801b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return min(result & 0xffff, result >> 16) + 1; 1802b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1803b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18049d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Buschstatic size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) 18059d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch{ 1806b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu return 4096 + ((nr_io_queues + 1) * 8 * dev->db_stride); 18079d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch} 18089d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch 18098d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_setup_io_queues(struct nvme_dev *dev) 1810b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 18113193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox struct nvme_queue *adminq = dev->queues[0]; 1812fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula struct pci_dev *pdev = dev->pci_dev; 18139d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch int result, cpu, i, vecs, nr_io_queues, size, q_depth; 1814b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1815b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = num_online_cpus(); 1816b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = set_queue_count(dev, nr_io_queues); 18171b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result < 0) 18181b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox return result; 1819b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox if (result < nr_io_queues) 1820b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 1821b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18229d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch size = db_bar_size(dev, nr_io_queues); 18239d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (size > 8192) { 1824f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox iounmap(dev->bar); 18259d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch do { 18269d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch dev->bar = ioremap(pci_resource_start(pdev, 0), size); 18279d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (dev->bar) 18289d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch break; 18299d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (!--nr_io_queues) 18309d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch return -ENOMEM; 18319d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch size = db_bar_size(dev, nr_io_queues); 18329d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch } while (1); 1833f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1834f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->queues[0]->q_db = dev->dbs; 1835f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox } 1836f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox 18379d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch /* Deregister the admin queue's interrupt */ 18383193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox free_irq(dev->entry[0].vector, adminq); 18399d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch 1840be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev for (i = 0; i < nr_io_queues; i++) 18411b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->entry[i].entry = i; 1842be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev vecs = pci_enable_msix_range(pdev, dev->entry, 1, nr_io_queues); 1843be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev if (vecs < 0) { 1844be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev vecs = pci_enable_msi_range(pdev, 1, min(nr_io_queues, 32)); 1845be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev if (vecs < 0) { 1846be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev vecs = 1; 1847be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev } else { 1848be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev for (i = 0; i < vecs; i++) 1849be577fabf3ec2c9593f4d3c044283be783b88c3bAlexander Gordeev dev->entry[i].vector = i + pdev->irq; 1850fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 1851fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 1852fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula 1853063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox /* 1854063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * Should investigate if there's a performance win from allocating 1855063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * more queues than interrupt vectors; it might allow the submission 1856063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * path to scale better, even if the receive path is limited by the 1857063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * number of interrupts. 1858063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox */ 1859063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox nr_io_queues = vecs; 1860063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox 18613193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox result = queue_request_irq(dev, adminq, adminq->irqname); 18629d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (result) { 18633193f07bb7ae723f33ac8e8b9db317a4f68d7d18Matthew Wilcox adminq->q_suspended = 1; 1864224042742582c9938788b81165180c876e997a07Keith Busch goto free_queues; 18659d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch } 18661b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1867cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch /* Free previously allocated queues that are no longer usable */ 1868cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch spin_lock(&dev_list_lock); 1869cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch for (i = dev->queue_count - 1; i > nr_io_queues; i--) { 1870cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct nvme_queue *nvmeq = dev->queues[i]; 1871cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 18720a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1873cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvme_cancel_ios(nvmeq, false); 18740a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1875cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 1876cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvme_free_queue(nvmeq); 1877cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch dev->queue_count--; 1878cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch dev->queues[i] = NULL; 1879cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch } 1880cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch spin_unlock(&dev_list_lock); 1881cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 18821b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_first(cpu_online_mask); 1883b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 18841b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox irq_set_affinity_hint(dev->entry[i].vector, get_cpu_mask(cpu)); 18851b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_next(cpu, cpu_online_mask); 18861b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 18871b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1888a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch q_depth = min_t(int, NVME_CAP_MQES(readq(&dev->bar->cap)) + 1, 1889a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch NVME_Q_DEPTH); 1890cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch for (i = dev->queue_count - 1; i < nr_io_queues; i++) { 1891224042742582c9938788b81165180c876e997a07Keith Busch dev->queues[i + 1] = nvme_alloc_queue(dev, i + 1, q_depth, i); 1892224042742582c9938788b81165180c876e997a07Keith Busch if (!dev->queues[i + 1]) { 1893224042742582c9938788b81165180c876e997a07Keith Busch result = -ENOMEM; 1894224042742582c9938788b81165180c876e997a07Keith Busch goto free_queues; 1895224042742582c9938788b81165180c876e997a07Keith Busch } 18961b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 1897b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18989ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox for (; i < num_possible_cpus(); i++) { 18999ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox int target = i % rounddown_pow_of_two(dev->queue_count - 1); 19009ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox dev->queues[i + 1] = dev->queues[target + 1]; 19019ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox } 19029ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox 1903224042742582c9938788b81165180c876e997a07Keith Busch for (i = 1; i < dev->queue_count; i++) { 1904224042742582c9938788b81165180c876e997a07Keith Busch result = nvme_create_queue(dev->queues[i], i); 1905224042742582c9938788b81165180c876e997a07Keith Busch if (result) { 1906224042742582c9938788b81165180c876e997a07Keith Busch for (--i; i > 0; i--) 1907224042742582c9938788b81165180c876e997a07Keith Busch nvme_disable_queue(dev, i); 1908224042742582c9938788b81165180c876e997a07Keith Busch goto free_queues; 1909224042742582c9938788b81165180c876e997a07Keith Busch } 1910224042742582c9938788b81165180c876e997a07Keith Busch } 1911b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1912224042742582c9938788b81165180c876e997a07Keith Busch return 0; 1913b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1914224042742582c9938788b81165180c876e997a07Keith Busch free_queues: 1915a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_free_queues(dev, 1); 1916224042742582c9938788b81165180c876e997a07Keith Busch return result; 1917b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1918b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1919422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox/* 1920422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Return: error value if an error occurred setting up the queues or calling 1921422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Identify Device. 0 if these succeeded, even if adding some of the 1922422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * namespaces failed. At the moment, these failures are silent. TBD which 1923422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * failures should be reported. 1924422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox */ 19258d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_dev_add(struct nvme_dev *dev) 1926b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 192768608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox struct pci_dev *pdev = dev->pci_dev; 1928c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox int res; 1929c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox unsigned nn, i; 1930cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch struct nvme_ns *ns; 193151814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox struct nvme_id_ctrl *ctrl; 1932bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_id_ns *id_ns; 1933bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox void *mem; 1934b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t dma_addr; 1935159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12; 1936b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 193768608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox mem = dma_alloc_coherent(&pdev->dev, 8192, &dma_addr, GFP_KERNEL); 1938a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch if (!mem) 1939a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch return -ENOMEM; 1940b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1941bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, 0, 1, dma_addr); 1942b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) { 1943b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = -EIO; 1944cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch goto out; 1945b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1946b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1947bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ctrl = mem; 194851814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox nn = le32_to_cpup(&ctrl->nn); 19490e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch dev->oncs = le16_to_cpup(&ctrl->oncs); 1950c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev->abort_limit = ctrl->acl + 1; 195151814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); 195251814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); 195351814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); 1954159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (ctrl->mdts) 19558fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); 195668608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox if ((pdev->vendor == PCI_VENDOR_ID_INTEL) && 195768608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox (pdev->device == 0x0953) && ctrl->vs[3]) 1958159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch dev->stripe_size = 1 << (ctrl->vs[3] + shift); 1959b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1960bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox id_ns = mem; 19612b2c1896871838cdf549442e8ad0264be5fa74e3Matthew Wilcox for (i = 1; i <= nn; i++) { 1962bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, i, 0, dma_addr); 1963b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1964b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1965b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1966bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox if (id_ns->ncap == 0) 1967b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1968b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1969bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_get_features(dev, NVME_FEAT_LBA_RANGE, i, 197008df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr + 4096, NULL); 1971b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1972122090366d1d5c6ec1bfb6dfdb3a6d121ff074aaKeith Busch memset(mem + 4096, 0, 4096); 1973b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1974bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ns = nvme_alloc_ns(dev, i, mem, mem + 4096); 1975b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (ns) 1976b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_add_tail(&ns->list, &dev->namespaces); 1977b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1978b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry(ns, &dev->namespaces, list) 1979b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox add_disk(ns->disk); 1980422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox res = 0; 1981b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1982bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox out: 1983684f5c2025b067a23722e620d0b3b858d8dc5d01Matthew Wilcox dma_free_coherent(&dev->pci_dev->dev, 8192, mem, dma_addr); 1984b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1985b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1986b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19870877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Buschstatic int nvme_dev_map(struct nvme_dev *dev) 19880877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch{ 19890877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch int bars, result = -ENOMEM; 19900877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch struct pci_dev *pdev = dev->pci_dev; 19910877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 19920877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (pci_enable_device_mem(pdev)) 19930877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch return result; 19940877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 19950877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->entry[0].vector = pdev->irq; 19960877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_set_master(pdev); 19970877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch bars = pci_select_bars(pdev, IORESOURCE_MEM); 19980877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (pci_request_selected_regions(pdev, bars, "nvme")) 19990877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto disable_pci; 20000877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 2001052d0efada8ccfccd924059b75f5fb119cd10f9aRussell King if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) && 2002052d0efada8ccfccd924059b75f5fb119cd10f9aRussell King dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) 2003052d0efada8ccfccd924059b75f5fb119cd10f9aRussell King goto disable; 20040877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20050877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 20060877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (!dev->bar) 20070877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto disable; 20080e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch if (readl(&dev->bar->csts) == -1) { 20090e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch result = -ENODEV; 20100e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch goto unmap; 20110e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch } 2012b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu dev->db_stride = 1 << NVME_CAP_STRIDE(readq(&dev->bar->cap)); 20130877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->dbs = ((void __iomem *)dev->bar) + 4096; 20140877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20150877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch return 0; 20160877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20170e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch unmap: 20180e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch iounmap(dev->bar); 20190e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch dev->bar = NULL; 20200877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch disable: 20210877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_release_regions(pdev); 20220877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch disable_pci: 20230877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_device(pdev); 20240877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch return result; 20250877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch} 20260877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20270877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Buschstatic void nvme_dev_unmap(struct nvme_dev *dev) 20280877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch{ 20290877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (dev->pci_dev->msi_enabled) 20300877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_msi(dev->pci_dev); 20310877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch else if (dev->pci_dev->msix_enabled) 20320877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_msix(dev->pci_dev); 20330877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20340877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (dev->bar) { 20350877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch iounmap(dev->bar); 20360877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->bar = NULL; 20379a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_release_regions(dev->pci_dev); 20380877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch } 20390877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20400877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (pci_is_enabled(dev->pci_dev)) 20410877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_device(dev->pci_dev); 20420877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch} 20430877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20444d115420707afcabe77d2535e092356df6664b70Keith Buschstruct nvme_delq_ctx { 20454d115420707afcabe77d2535e092356df6664b70Keith Busch struct task_struct *waiter; 20464d115420707afcabe77d2535e092356df6664b70Keith Busch struct kthread_worker *worker; 20474d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_t refcount; 20484d115420707afcabe77d2535e092356df6664b70Keith Busch}; 20494d115420707afcabe77d2535e092356df6664b70Keith Busch 20504d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_wait_dq(struct nvme_delq_ctx *dq, struct nvme_dev *dev) 20514d115420707afcabe77d2535e092356df6664b70Keith Busch{ 20524d115420707afcabe77d2535e092356df6664b70Keith Busch dq->waiter = current; 20534d115420707afcabe77d2535e092356df6664b70Keith Busch mb(); 20544d115420707afcabe77d2535e092356df6664b70Keith Busch 20554d115420707afcabe77d2535e092356df6664b70Keith Busch for (;;) { 20564d115420707afcabe77d2535e092356df6664b70Keith Busch set_current_state(TASK_KILLABLE); 20574d115420707afcabe77d2535e092356df6664b70Keith Busch if (!atomic_read(&dq->refcount)) 20584d115420707afcabe77d2535e092356df6664b70Keith Busch break; 20594d115420707afcabe77d2535e092356df6664b70Keith Busch if (!schedule_timeout(ADMIN_TIMEOUT) || 20604d115420707afcabe77d2535e092356df6664b70Keith Busch fatal_signal_pending(current)) { 20614d115420707afcabe77d2535e092356df6664b70Keith Busch set_current_state(TASK_RUNNING); 20624d115420707afcabe77d2535e092356df6664b70Keith Busch 20634d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_ctrl(dev, readq(&dev->bar->cap)); 20644d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_queue(dev, 0); 20654d115420707afcabe77d2535e092356df6664b70Keith Busch 20664d115420707afcabe77d2535e092356df6664b70Keith Busch send_sig(SIGKILL, dq->worker->task, 1); 20674d115420707afcabe77d2535e092356df6664b70Keith Busch flush_kthread_worker(dq->worker); 20684d115420707afcabe77d2535e092356df6664b70Keith Busch return; 20694d115420707afcabe77d2535e092356df6664b70Keith Busch } 20704d115420707afcabe77d2535e092356df6664b70Keith Busch } 20714d115420707afcabe77d2535e092356df6664b70Keith Busch set_current_state(TASK_RUNNING); 20724d115420707afcabe77d2535e092356df6664b70Keith Busch} 20734d115420707afcabe77d2535e092356df6664b70Keith Busch 20744d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_put_dq(struct nvme_delq_ctx *dq) 20754d115420707afcabe77d2535e092356df6664b70Keith Busch{ 20764d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_dec(&dq->refcount); 20774d115420707afcabe77d2535e092356df6664b70Keith Busch if (dq->waiter) 20784d115420707afcabe77d2535e092356df6664b70Keith Busch wake_up_process(dq->waiter); 20794d115420707afcabe77d2535e092356df6664b70Keith Busch} 20804d115420707afcabe77d2535e092356df6664b70Keith Busch 20814d115420707afcabe77d2535e092356df6664b70Keith Buschstatic struct nvme_delq_ctx *nvme_get_dq(struct nvme_delq_ctx *dq) 20824d115420707afcabe77d2535e092356df6664b70Keith Busch{ 20834d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_inc(&dq->refcount); 20844d115420707afcabe77d2535e092356df6664b70Keith Busch return dq; 20854d115420707afcabe77d2535e092356df6664b70Keith Busch} 20864d115420707afcabe77d2535e092356df6664b70Keith Busch 20874d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_queue_end(struct nvme_queue *nvmeq) 20884d115420707afcabe77d2535e092356df6664b70Keith Busch{ 20894d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_delq_ctx *dq = nvmeq->cmdinfo.ctx; 20904d115420707afcabe77d2535e092356df6664b70Keith Busch 20914d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_clear_queue(nvmeq); 20924d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_put_dq(dq); 20934d115420707afcabe77d2535e092356df6664b70Keith Busch} 20944d115420707afcabe77d2535e092356df6664b70Keith Busch 20954d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int adapter_async_del_queue(struct nvme_queue *nvmeq, u8 opcode, 20964d115420707afcabe77d2535e092356df6664b70Keith Busch kthread_work_func_t fn) 20974d115420707afcabe77d2535e092356df6664b70Keith Busch{ 20984d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_command c; 20994d115420707afcabe77d2535e092356df6664b70Keith Busch 21004d115420707afcabe77d2535e092356df6664b70Keith Busch memset(&c, 0, sizeof(c)); 21014d115420707afcabe77d2535e092356df6664b70Keith Busch c.delete_queue.opcode = opcode; 21024d115420707afcabe77d2535e092356df6664b70Keith Busch c.delete_queue.qid = cpu_to_le16(nvmeq->qid); 21034d115420707afcabe77d2535e092356df6664b70Keith Busch 21044d115420707afcabe77d2535e092356df6664b70Keith Busch init_kthread_work(&nvmeq->cmdinfo.work, fn); 21054d115420707afcabe77d2535e092356df6664b70Keith Busch return nvme_submit_admin_cmd_async(nvmeq->dev, &c, &nvmeq->cmdinfo); 21064d115420707afcabe77d2535e092356df6664b70Keith Busch} 21074d115420707afcabe77d2535e092356df6664b70Keith Busch 21084d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_cq_work_handler(struct kthread_work *work) 21094d115420707afcabe77d2535e092356df6664b70Keith Busch{ 21104d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 21114d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo.work); 21124d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_queue_end(nvmeq); 21134d115420707afcabe77d2535e092356df6664b70Keith Busch} 21144d115420707afcabe77d2535e092356df6664b70Keith Busch 21154d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_delete_cq(struct nvme_queue *nvmeq) 21164d115420707afcabe77d2535e092356df6664b70Keith Busch{ 21174d115420707afcabe77d2535e092356df6664b70Keith Busch return adapter_async_del_queue(nvmeq, nvme_admin_delete_cq, 21184d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_cq_work_handler); 21194d115420707afcabe77d2535e092356df6664b70Keith Busch} 21204d115420707afcabe77d2535e092356df6664b70Keith Busch 21214d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_sq_work_handler(struct kthread_work *work) 21224d115420707afcabe77d2535e092356df6664b70Keith Busch{ 21234d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 21244d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo.work); 21254d115420707afcabe77d2535e092356df6664b70Keith Busch int status = nvmeq->cmdinfo.status; 21264d115420707afcabe77d2535e092356df6664b70Keith Busch 21274d115420707afcabe77d2535e092356df6664b70Keith Busch if (!status) 21284d115420707afcabe77d2535e092356df6664b70Keith Busch status = nvme_delete_cq(nvmeq); 21294d115420707afcabe77d2535e092356df6664b70Keith Busch if (status) 21304d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_queue_end(nvmeq); 21314d115420707afcabe77d2535e092356df6664b70Keith Busch} 21324d115420707afcabe77d2535e092356df6664b70Keith Busch 21334d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_delete_sq(struct nvme_queue *nvmeq) 21344d115420707afcabe77d2535e092356df6664b70Keith Busch{ 21354d115420707afcabe77d2535e092356df6664b70Keith Busch return adapter_async_del_queue(nvmeq, nvme_admin_delete_sq, 21364d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_sq_work_handler); 21374d115420707afcabe77d2535e092356df6664b70Keith Busch} 21384d115420707afcabe77d2535e092356df6664b70Keith Busch 21394d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_queue_start(struct kthread_work *work) 21404d115420707afcabe77d2535e092356df6664b70Keith Busch{ 21414d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 21424d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo.work); 21434d115420707afcabe77d2535e092356df6664b70Keith Busch allow_signal(SIGKILL); 21444d115420707afcabe77d2535e092356df6664b70Keith Busch if (nvme_delete_sq(nvmeq)) 21454d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_queue_end(nvmeq); 21464d115420707afcabe77d2535e092356df6664b70Keith Busch} 21474d115420707afcabe77d2535e092356df6664b70Keith Busch 21484d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_disable_io_queues(struct nvme_dev *dev) 21494d115420707afcabe77d2535e092356df6664b70Keith Busch{ 21504d115420707afcabe77d2535e092356df6664b70Keith Busch int i; 21514d115420707afcabe77d2535e092356df6664b70Keith Busch DEFINE_KTHREAD_WORKER_ONSTACK(worker); 21524d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_delq_ctx dq; 21534d115420707afcabe77d2535e092356df6664b70Keith Busch struct task_struct *kworker_task = kthread_run(kthread_worker_fn, 21544d115420707afcabe77d2535e092356df6664b70Keith Busch &worker, "nvme%d", dev->instance); 21554d115420707afcabe77d2535e092356df6664b70Keith Busch 21564d115420707afcabe77d2535e092356df6664b70Keith Busch if (IS_ERR(kworker_task)) { 21574d115420707afcabe77d2535e092356df6664b70Keith Busch dev_err(&dev->pci_dev->dev, 21584d115420707afcabe77d2535e092356df6664b70Keith Busch "Failed to create queue del task\n"); 21594d115420707afcabe77d2535e092356df6664b70Keith Busch for (i = dev->queue_count - 1; i > 0; i--) 21604d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_queue(dev, i); 21614d115420707afcabe77d2535e092356df6664b70Keith Busch return; 21624d115420707afcabe77d2535e092356df6664b70Keith Busch } 21634d115420707afcabe77d2535e092356df6664b70Keith Busch 21644d115420707afcabe77d2535e092356df6664b70Keith Busch dq.waiter = NULL; 21654d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_set(&dq.refcount, 0); 21664d115420707afcabe77d2535e092356df6664b70Keith Busch dq.worker = &worker; 21674d115420707afcabe77d2535e092356df6664b70Keith Busch for (i = dev->queue_count - 1; i > 0; i--) { 21684d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = dev->queues[i]; 21694d115420707afcabe77d2535e092356df6664b70Keith Busch 21704d115420707afcabe77d2535e092356df6664b70Keith Busch if (nvme_suspend_queue(nvmeq)) 21714d115420707afcabe77d2535e092356df6664b70Keith Busch continue; 21724d115420707afcabe77d2535e092356df6664b70Keith Busch nvmeq->cmdinfo.ctx = nvme_get_dq(&dq); 21734d115420707afcabe77d2535e092356df6664b70Keith Busch nvmeq->cmdinfo.worker = dq.worker; 21744d115420707afcabe77d2535e092356df6664b70Keith Busch init_kthread_work(&nvmeq->cmdinfo.work, nvme_del_queue_start); 21754d115420707afcabe77d2535e092356df6664b70Keith Busch queue_kthread_work(dq.worker, &nvmeq->cmdinfo.work); 21764d115420707afcabe77d2535e092356df6664b70Keith Busch } 21774d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_wait_dq(&dq, dev); 21784d115420707afcabe77d2535e092356df6664b70Keith Busch kthread_stop(kworker_task); 21794d115420707afcabe77d2535e092356df6664b70Keith Busch} 21804d115420707afcabe77d2535e092356df6664b70Keith Busch 2181f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Buschstatic void nvme_dev_shutdown(struct nvme_dev *dev) 2182b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2183224042742582c9938788b81165180c876e997a07Keith Busch int i; 2184224042742582c9938788b81165180c876e997a07Keith Busch 2185d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized = 0; 2186b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 21871fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 2188f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch list_del_init(&dev->node); 21891fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 21901fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 21914d115420707afcabe77d2535e092356df6664b70Keith Busch if (!dev->bar || (dev->bar && readl(&dev->bar->csts) == -1)) { 21924d115420707afcabe77d2535e092356df6664b70Keith Busch for (i = dev->queue_count - 1; i >= 0; i--) { 21934d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = dev->queues[i]; 21944d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_suspend_queue(nvmeq); 21954d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_clear_queue(nvmeq); 21964d115420707afcabe77d2535e092356df6664b70Keith Busch } 21974d115420707afcabe77d2535e092356df6664b70Keith Busch } else { 21984d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_io_queues(dev); 21991894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch nvme_shutdown_ctrl(dev); 22004d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_queue(dev, 0); 22014d115420707afcabe77d2535e092356df6664b70Keith Busch } 2202f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_dev_unmap(dev); 2203f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch} 2204f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2205f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Buschstatic void nvme_dev_remove(struct nvme_dev *dev) 2206f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch{ 22079ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_ns *ns; 2208f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 22099ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch list_for_each_entry(ns, &dev->namespaces, list) { 22109ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch if (ns->disk->flags & GENHD_FL_UP) 22119ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch del_gendisk(ns->disk); 22129ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch if (!blk_queue_dying(ns->queue)) 22139ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch blk_cleanup_queue(ns->queue); 2214b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 2215b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2216b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2217091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic int nvme_setup_prp_pools(struct nvme_dev *dev) 2218091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 2219091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 2220091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dev->prp_page_pool = dma_pool_create("prp list page", dmadev, 2221091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox PAGE_SIZE, PAGE_SIZE, 0); 2222091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (!dev->prp_page_pool) 2223091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return -ENOMEM; 2224091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 222599802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox /* Optimisation for I/Os between 4k and 128k */ 222699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dev->prp_small_pool = dma_pool_create("prp list 256", dmadev, 222799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 256, 256, 0); 222899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (!dev->prp_small_pool) { 222999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 223099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox return -ENOMEM; 223199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 2232091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return 0; 2233091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 2234091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2235091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic void nvme_release_prp_pools(struct nvme_dev *dev) 2236091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 2237091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 223899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_small_pool); 2239091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 2240091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2241cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic DEFINE_IDA(nvme_instance_ida); 2242cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2243cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic int nvme_set_instance(struct nvme_dev *dev) 2244b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2245cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh int instance, error; 2246cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2247cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh do { 2248cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) 2249cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 2250cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2251cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 2252cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh error = ida_get_new(&nvme_instance_ida, &instance); 2253cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 2254cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh } while (error == -EAGAIN); 2255cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2256cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (error) 2257cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 2258cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2259cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh dev->instance = instance; 2260cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return 0; 2261b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2262b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2263b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_release_instance(struct nvme_dev *dev) 2264b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2265cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 2266cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh ida_remove(&nvme_instance_ida, dev->instance); 2267cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 2268b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2269b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 22709ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Buschstatic void nvme_free_namespaces(struct nvme_dev *dev) 22719ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch{ 22729ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch struct nvme_ns *ns, *next; 22739ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 22749ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 22759ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch list_del(&ns->list); 22769ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch put_disk(ns->disk); 22779ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch kfree(ns); 22789ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch } 22799ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch} 22809ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 22815e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic void nvme_free_dev(struct kref *kref) 22825e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 22835e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref); 22849ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch 22859ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch nvme_free_namespaces(dev); 22865e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->queues); 22875e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->entry); 22885e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev); 22895e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 22905e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 22915e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_open(struct inode *inode, struct file *f) 22925e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 22935e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(f->private_data, struct nvme_dev, 22945e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch miscdev); 22955e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_get(&dev->kref); 22965e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch f->private_data = dev; 22975e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 22985e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 22995e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 23005e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_release(struct inode *inode, struct file *f) 23015e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 23025e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 23035e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 23045e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 23055e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 23065e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 23075e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg) 23085e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 23095e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 23105e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch switch (cmd) { 23115e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch case NVME_IOCTL_ADMIN_CMD: 23125e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return nvme_user_admin_cmd(dev, (void __user *)arg); 23135e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch default: 23145e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return -ENOTTY; 23155e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch } 23165e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 23175e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 23185e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic const struct file_operations nvme_dev_fops = { 23195e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .owner = THIS_MODULE, 23205e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .open = nvme_dev_open, 23215e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .release = nvme_dev_release, 23225e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .unlocked_ioctl = nvme_dev_ioctl, 23235e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .compat_ioctl = nvme_dev_ioctl, 23245e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch}; 23255e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 2326f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Buschstatic int nvme_dev_start(struct nvme_dev *dev) 2327f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch{ 2328f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch int result; 2329f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2330f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_dev_map(dev); 2331f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch if (result) 2332f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch return result; 2333f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2334f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_configure_admin_queue(dev); 2335f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch if (result) 2336f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch goto unmap; 2337f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2338f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_lock(&dev_list_lock); 2339f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch list_add(&dev->node, &dev_list); 2340f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_unlock(&dev_list_lock); 2341f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2342f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_setup_io_queues(dev); 2343d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result && result != -EBUSY) 2344f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch goto disable; 2345f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2346d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch return result; 2347f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2348f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch disable: 2349a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_disable_queue(dev, 0); 2350f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_lock(&dev_list_lock); 2351f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch list_del_init(&dev->node); 2352f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_unlock(&dev_list_lock); 2353f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch unmap: 2354f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_dev_unmap(dev); 2355f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch return result; 2356f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch} 2357f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 23589a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic int nvme_remove_dead_ctrl(void *arg) 23599a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 23609a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct nvme_dev *dev = (struct nvme_dev *)arg; 23619a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct pci_dev *pdev = dev->pci_dev; 23629a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 23639a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (pci_get_drvdata(pdev)) 23649a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_stop_and_remove_bus_device(pdev); 23659a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kref_put(&dev->kref, nvme_free_dev); 23669a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return 0; 23679a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 23689a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 23699a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic void nvme_remove_disks(struct work_struct *ws) 23709a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 23719a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch int i; 23729a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); 23739a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 23749a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_remove(dev); 23759a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_lock(&dev_list_lock); 23769a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch for (i = dev->queue_count - 1; i > 0; i--) { 23779a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch BUG_ON(!dev->queues[i] || !dev->queues[i]->q_suspended); 23789a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_free_queue(dev->queues[i]); 23799a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev->queue_count--; 23809a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev->queues[i] = NULL; 23819a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 23829a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_unlock(&dev_list_lock); 23839a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 23849a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 23859a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic int nvme_dev_resume(struct nvme_dev *dev) 23869a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 23879a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch int ret; 23889a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 23899a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch ret = nvme_dev_start(dev); 23909a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (ret && ret != -EBUSY) 23919a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return ret; 23929a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (ret == -EBUSY) { 23939a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_lock(&dev_list_lock); 2394bdfd70fde389412be60f7e8aaed5732dc26fc8acMatthew Wilcox PREPARE_WORK(&dev->reset_work, nvme_remove_disks); 23959a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch queue_work(nvme_workq, &dev->reset_work); 23969a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_unlock(&dev_list_lock); 23979a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 2398d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized = 1; 23999a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return 0; 24009a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 24019a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 24029a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic void nvme_dev_reset(struct nvme_dev *dev) 24039a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 24049a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_shutdown(dev); 24059a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (nvme_dev_resume(dev)) { 24069a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev_err(&dev->pci_dev->dev, "Device failed to resume\n"); 24079a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kref_get(&dev->kref); 24089a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (IS_ERR(kthread_run(nvme_remove_dead_ctrl, dev, "nvme%d", 24099a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev->instance))) { 24109a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev_err(&dev->pci_dev->dev, 24119a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch "Failed to start controller remove task\n"); 24129a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kref_put(&dev->kref, nvme_free_dev); 24139a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 24149a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 24159a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 24169a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 24179a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic void nvme_reset_failed_dev(struct work_struct *ws) 24189a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 24199a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); 24209a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_reset(dev); 24219a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 24229a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 24238d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) 2424b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 24250877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch int result = -ENOMEM; 2426b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev; 2427b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2428b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev = kzalloc(sizeof(*dev), GFP_KERNEL); 2429b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev) 2430b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOMEM; 2431b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->entry = kcalloc(num_possible_cpus(), sizeof(*dev->entry), 2432b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 2433b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->entry) 2434b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 24351b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queues = kcalloc(num_possible_cpus() + 1, sizeof(void *), 24361b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox GFP_KERNEL); 2437b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->queues) 2438b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 2439b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2440b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox INIT_LIST_HEAD(&dev->namespaces); 2441bdfd70fde389412be60f7e8aaed5732dc26fc8acMatthew Wilcox INIT_WORK(&dev->reset_work, nvme_reset_failed_dev); 2442b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->pci_dev = pdev; 24439a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_set_drvdata(pdev, dev); 2444cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh result = nvme_set_instance(dev); 2445cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (result) 24460877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto free; 2447b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2448091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox result = nvme_setup_prp_pools(dev); 2449091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (result) 24500877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto release; 2451091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2452f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_dev_start(dev); 2453d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result) { 2454d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result == -EBUSY) 2455d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch goto create_cdev; 24560877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto release_pools; 2457d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch } 2458b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 24599ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch kref_init(&dev->kref); 2460740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox result = nvme_dev_add(dev); 2461d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result) 2462f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch goto shutdown; 2463740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 2464d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch create_cdev: 24655e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch scnprintf(dev->name, sizeof(dev->name), "nvme%d", dev->instance); 24665e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.minor = MISC_DYNAMIC_MINOR; 24675e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.parent = &pdev->dev; 24685e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.name = dev->name; 24695e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.fops = &nvme_dev_fops; 24705e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch result = misc_register(&dev->miscdev); 24715e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch if (result) 24725e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch goto remove; 24735e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 2474d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized = 1; 2475b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 2476b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 24775e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch remove: 24785e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_dev_remove(dev); 24799ac27090f61ea6735a62b0a98c7669c833bcdc09Keith Busch nvme_free_namespaces(dev); 2480f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch shutdown: 2481f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_dev_shutdown(dev); 24820877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch release_pools: 2483a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_free_queues(dev, 0); 2484091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 24850877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch release: 24860877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch nvme_release_instance(dev); 2487b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free: 2488b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 2489b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 2490b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 2491b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 2492b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2493b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 249409ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Buschstatic void nvme_shutdown(struct pci_dev *pdev) 249509ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch{ 249609ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch struct nvme_dev *dev = pci_get_drvdata(pdev); 249709ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch nvme_dev_shutdown(dev); 249809ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch} 249909ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch 25008d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic void nvme_remove(struct pci_dev *pdev) 2501b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2502b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev = pci_get_drvdata(pdev); 25039a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 25049a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_lock(&dev_list_lock); 25059a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch list_del_init(&dev->node); 25069a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_unlock(&dev_list_lock); 25079a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 25089a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_set_drvdata(pdev, NULL); 25099a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch flush_work(&dev->reset_work); 25105e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch misc_deregister(&dev->miscdev); 25119a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_remove(dev); 25129a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_shutdown(dev); 2513a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_free_queues(dev, 0); 25149a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_release_instance(dev); 25159a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_release_prp_pools(dev); 25165e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 2517b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2518b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2519b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* These functions are yet to be implemented */ 2520b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_detected NULL 2521b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_dump_registers NULL 2522b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_link_reset NULL 2523b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_slot_reset NULL 2524b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_resume NULL 2525cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2526cd63894630ab17a192bf97427d16dbec10710a6aKeith Buschstatic int nvme_suspend(struct device *dev) 2527cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch{ 2528cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct pci_dev *pdev = to_pci_dev(dev); 2529cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct nvme_dev *ndev = pci_get_drvdata(pdev); 2530cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2531cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvme_dev_shutdown(ndev); 2532cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return 0; 2533cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch} 2534cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2535cd63894630ab17a192bf97427d16dbec10710a6aKeith Buschstatic int nvme_resume(struct device *dev) 2536cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch{ 2537cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct pci_dev *pdev = to_pci_dev(dev); 2538cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct nvme_dev *ndev = pci_get_drvdata(pdev); 2539cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 25409a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (nvme_dev_resume(ndev) && !work_busy(&ndev->reset_work)) { 2541bdfd70fde389412be60f7e8aaed5732dc26fc8acMatthew Wilcox PREPARE_WORK(&ndev->reset_work, nvme_reset_failed_dev); 25429a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch queue_work(nvme_workq, &ndev->reset_work); 25439a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 25449a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return 0; 2545cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch} 2546cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2547cd63894630ab17a192bf97427d16dbec10710a6aKeith Buschstatic SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume); 2548b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 25491d3520357df99baf4ad89f86268ac96cd38092d9Stephen Hemmingerstatic const struct pci_error_handlers nvme_err_handler = { 2550b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .error_detected = nvme_error_detected, 2551b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .mmio_enabled = nvme_dump_registers, 2552b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .link_reset = nvme_link_reset, 2553b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .slot_reset = nvme_slot_reset, 2554b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_error_resume, 2555b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2556b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2557b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* Move to pci_ids.h later */ 2558b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define PCI_CLASS_STORAGE_EXPRESS 0x010802 2559b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2560b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic DEFINE_PCI_DEVICE_TABLE(nvme_id_table) = { 2561b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 2562b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { 0, } 2563b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2564b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_DEVICE_TABLE(pci, nvme_id_table); 2565b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2566b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct pci_driver nvme_driver = { 2567b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .name = "nvme", 2568b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .id_table = nvme_id_table, 2569b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .probe = nvme_probe, 25708d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartman .remove = nvme_remove, 257109ece1424f52a2d3ad0ab715e96b0fb342af4f03Keith Busch .shutdown = nvme_shutdown, 2572cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch .driver = { 2573cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch .pm = &nvme_dev_pm_ops, 2574cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch }, 2575b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .err_handler = &nvme_err_handler, 2576b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2577b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2578b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __init nvme_init(void) 2579b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 25800ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox int result; 25811fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 25821fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 25831fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (IS_ERR(nvme_thread)) 25841fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return PTR_ERR(nvme_thread); 2585b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 25869a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch result = -ENOMEM; 25879a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_workq = create_singlethread_workqueue("nvme"); 25889a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (!nvme_workq) 25899a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch goto kill_kthread; 25909a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 25915c42ea1643a630060f9e71e06d3933d244970967Keith Busch result = register_blkdev(nvme_major, "nvme"); 25925c42ea1643a630060f9e71e06d3933d244970967Keith Busch if (result < 0) 25939a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch goto kill_workq; 25945c42ea1643a630060f9e71e06d3933d244970967Keith Busch else if (result > 0) 25950ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox nvme_major = result; 2596b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2597b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = pci_register_driver(&nvme_driver); 25981fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (result) 25991fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto unregister_blkdev; 26001fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 2601b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 26021fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox unregister_blkdev: 2603b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 26049a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kill_workq: 26059a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch destroy_workqueue(nvme_workq); 26061fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kill_kthread: 26071fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 2608b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 2609b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2610b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2611b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __exit nvme_exit(void) 2612b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2613b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_unregister_driver(&nvme_driver); 2614b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 26159a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch destroy_workqueue(nvme_workq); 26161fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 2617b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2618b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2619b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 2620b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_LICENSE("GPL"); 2621366e8217e5ec6ce9f73aec19c46d983110fb4a98Matthew WilcoxMODULE_VERSION("0.8"); 2622b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_init(nvme_init); 2623b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_exit(nvme_exit); 2624