nvme-core.c revision a1a5ef9998b1379780790b878457b0e0f48b25db
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}; 714d115420707afcabe77d2535e092356df6664b70Keith Busch 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; 79b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spinlock_t q_lock; 80b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command *sq_cmds; 81b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox volatile struct nvme_completion *cqes; 82b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t sq_dma_addr; 83b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t cq_dma_addr; 84b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_queue_head_t sq_full; 851fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox wait_queue_t sq_cong_wait; 86b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio_list sq_cong; 87b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 __iomem *q_db; 88b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 q_depth; 89b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_vector; 90b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_head; 91b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_tail; 92b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_head; 93c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch u16 qid; 94e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox u8 cq_phase; 95e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox u8 cqe_seen; 96224042742582c9938788b81165180c876e997a07Keith Busch u8 q_suspended; 974d115420707afcabe77d2535e092356df6664b70Keith Busch struct async_cmd_info cmdinfo; 98b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long cmdid_data[]; 99b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 100b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 101b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 102b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Check we didin't inadvertently grow the command struct 103b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 104b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic inline void _nvme_check_size(void) 105b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 106b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); 107b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); 108b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); 109b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); 110b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_features) != 64); 111f8ebf8409abfdaeeb8c847381629a2a8b8e3d816Vishal Verma BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); 112c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); 113b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_command) != 64); 114b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); 115b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); 116b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); 1176ecec74520d8a357726e6c12f99080dbe7b347ddKeith Busch BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); 118b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 119b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1205c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxtypedef void (*nvme_completion_fn)(struct nvme_dev *, void *, 121c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *); 122c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 123e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstruct nvme_cmd_info { 124c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 125c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 126e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox unsigned long timeout; 127c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch int aborted; 128e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox}; 129e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 130e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstatic struct nvme_cmd_info *nvme_cmd_info(struct nvme_queue *nvmeq) 131e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox{ 132e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return (void *)&nvmeq->cmdid_data[BITS_TO_LONGS(nvmeq->q_depth)]; 133e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox} 134e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 135224042742582c9938788b81165180c876e997a07Keith Buschstatic unsigned nvme_queue_extra(int depth) 136224042742582c9938788b81165180c876e997a07Keith Busch{ 137224042742582c9938788b81165180c876e997a07Keith Busch return DIV_ROUND_UP(depth, 8) + (depth * sizeof(struct nvme_cmd_info)); 138224042742582c9938788b81165180c876e997a07Keith Busch} 139224042742582c9938788b81165180c876e997a07Keith Busch 140b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 141714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * alloc_cmdid() - Allocate a Command ID 142714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @nvmeq: The queue that will be used for this command 143714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @ctx: A pointer that will be passed to the handler 144c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox * @handler: The function to call on completion 145b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 146b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Allocate a Command ID for a queue. The data passed in will 147b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * be passed to the completion handler. This is implemented by using 148b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the bottom two bits of the ctx pointer to store the handler ID. 149b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Passing in a pointer that's not 4-byte aligned will cause a BUG. 150b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * We can change this if it becomes a problem. 151184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * 152184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * May be called with local interrupts disabled and the q_lock held, 153184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * or with interrupts enabled and no locks held. 154b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 155c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic int alloc_cmdid(struct nvme_queue *nvmeq, void *ctx, 156c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 157b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 158e6d15f79f997a98b3a69abbc462fc9041cc1a7b4Matthew Wilcox int depth = nvmeq->q_depth - 1; 159e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 160b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 161b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 162b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox do { 163b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdid = find_first_zero_bit(nvmeq->cmdid_data, depth); 164b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid >= depth) 165b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EBUSY; 166b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } while (test_and_set_bit(cmdid, nvmeq->cmdid_data)); 167b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 168c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = handler; 169c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].ctx = ctx; 170e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].timeout = jiffies + timeout; 171c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch info[cmdid].aborted = 0; 172b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 173b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 174b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 175b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int alloc_cmdid_killable(struct nvme_queue *nvmeq, void *ctx, 176c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 177b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 178b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 179b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_event_killable(nvmeq->sq_full, 180e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox (cmdid = alloc_cmdid(nvmeq, ctx, handler, timeout)) >= 0); 181b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return (cmdid < 0) ? -EINTR : cmdid; 182b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 183b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 184c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox/* Special values must be less than 0x1000 */ 185c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox#define CMD_CTX_BASE ((void *)POISON_POINTER_DELTA) 186d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_CANCELLED (0x30C + CMD_CTX_BASE) 187d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_COMPLETED (0x310 + CMD_CTX_BASE) 188d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_INVALID (0x314 + CMD_CTX_BASE) 18900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox#define CMD_CTX_FLUSH (0x318 + CMD_CTX_BASE) 190c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch#define CMD_CTX_ABORT (0x31C + CMD_CTX_BASE) 191be7b62754e097adc0cb16c25c9ee86ee20de62fbMatthew Wilcox 1925c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void special_completion(struct nvme_dev *dev, void *ctx, 193c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 194c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 195c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_CANCELLED) 196c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 197c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_FLUSH) 198c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 199c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (ctx == CMD_CTX_ABORT) { 200c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch ++dev->abort_limit; 201c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 202c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch } 203c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_COMPLETED) { 2045c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 205c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "completed id %d twice on queue %d\n", 206c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 207c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 208c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 209c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_INVALID) { 2105c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 211c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "invalid id %d completed on queue %d\n", 212c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 213c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 214c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 215c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 2165c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, "Unknown special completion %p\n", ctx); 217c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 218c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 2194d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void async_completion(struct nvme_dev *dev, void *ctx, 2204d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_completion *cqe) 2214d115420707afcabe77d2535e092356df6664b70Keith Busch{ 2224d115420707afcabe77d2535e092356df6664b70Keith Busch struct async_cmd_info *cmdinfo = ctx; 2234d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo->result = le32_to_cpup(&cqe->result); 2244d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 2254d115420707afcabe77d2535e092356df6664b70Keith Busch queue_kthread_work(cmdinfo->worker, &cmdinfo->work); 2264d115420707afcabe77d2535e092356df6664b70Keith Busch} 2274d115420707afcabe77d2535e092356df6664b70Keith Busch 228184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 229184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 230184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 231c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *free_cmdid(struct nvme_queue *nvmeq, int cmdid, 232c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 233b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 234c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 235e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 236b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 237c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (cmdid >= nvmeq->q_depth) { 238c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = special_completion; 23948e3d39816416b3bf03dee3a796c0c04427c1a31Matthew Wilcox return CMD_CTX_INVALID; 240c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 241859361a228258edf4821d9f5635825033eca78e8Keith Busch if (fn) 242859361a228258edf4821d9f5635825033eca78e8Keith Busch *fn = info[cmdid].fn; 243c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 244c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 245e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_COMPLETED; 246b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox clear_bit(cmdid, nvmeq->cmdid_data); 247b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wake_up(&nvmeq->sq_full); 248c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 249b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 250b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 251c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *cancel_cmdid(struct nvme_queue *nvmeq, int cmdid, 252c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 2533c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 254c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 255e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 256c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (fn) 257c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = info[cmdid].fn; 258c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 259c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 260e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_CANCELLED; 261c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 2623c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 2633c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 2645d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermastruct nvme_queue *get_nvmeq(struct nvme_dev *dev) 265b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 266040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox return dev->queues[get_cpu() + 1]; 267b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 268b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2695d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid put_nvmeq(struct nvme_queue *nvmeq) 270b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2711b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox put_cpu(); 272b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 273b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 274b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 275714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * nvme_submit_cmd() - Copy a command into a queue and ring the doorbell 276b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @nvmeq: The queue to use 277b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @cmd: The command to send 278b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 279b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Safe to use from interrupt context 280b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 281b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) 282b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 283b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long flags; 284b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 tail; 285b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_irqsave(&nvmeq->q_lock, flags); 286b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = nvmeq->sq_tail; 287b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); 288b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++tail == nvmeq->q_depth) 289b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = 0; 2907547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(tail, nvmeq->q_db); 291b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = tail; 292b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_unlock_irqrestore(&nvmeq->q_lock, flags); 293b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 294b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 295b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 296b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 297eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic __le64 **iod_list(struct nvme_iod *iod) 298e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews{ 299eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ((void *)iod) + iod->offset; 300e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews} 301e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 302eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox/* 303eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * Will slightly overestimate the number of pages needed. This is OK 304eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * as it only leads to a small amount of wasted memory for the lifetime of 305eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * the I/O. 306eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox */ 307eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_npages(unsigned size) 308eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox{ 309eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned nprps = DIV_ROUND_UP(size + PAGE_SIZE, PAGE_SIZE); 310eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); 311eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox} 312b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 313eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic struct nvme_iod * 314eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxnvme_alloc_iod(unsigned nseg, unsigned nbytes, gfp_t gfp) 315b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 316eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + 317eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(__le64 *) * nvme_npages(nbytes) + 318eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(struct scatterlist) * nseg, gfp); 319eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 320eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod) { 321eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->offset = offsetof(struct nvme_iod, sg[nseg]); 322eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 323eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->length = nbytes; 3242b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch iod->nents = 0; 3256198221fa0df0298513b35796f63f242ea97134eKeith Busch iod->start_time = jiffies; 326eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 327eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 328eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 329b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 330b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3315d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) 332b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 333eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox const int last_prp = PAGE_SIZE / 8 - 1; 334eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int i; 335eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 336eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t prp_dma = iod->first_dma; 337eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 338eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod->npages == 0) 339eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_small_pool, list[0], prp_dma); 340eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox for (i = 0; i < iod->npages; i++) { 341eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 *prp_list = list[i]; 342eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); 343eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); 344eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox prp_dma = next_prp_dma; 345eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 346eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 347b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 348b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3496198221fa0df0298513b35796f63f242ea97134eKeith Buschstatic void nvme_start_io_acct(struct bio *bio) 3506198221fa0df0298513b35796f63f242ea97134eKeith Busch{ 3516198221fa0df0298513b35796f63f242ea97134eKeith Busch struct gendisk *disk = bio->bi_bdev->bd_disk; 3526198221fa0df0298513b35796f63f242ea97134eKeith Busch const int rw = bio_data_dir(bio); 3536198221fa0df0298513b35796f63f242ea97134eKeith Busch int cpu = part_stat_lock(); 3546198221fa0df0298513b35796f63f242ea97134eKeith Busch part_round_stats(cpu, &disk->part0); 3556198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_inc(cpu, &disk->part0, ios[rw]); 3566198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_add(cpu, &disk->part0, sectors[rw], bio_sectors(bio)); 3576198221fa0df0298513b35796f63f242ea97134eKeith Busch part_inc_in_flight(&disk->part0, rw); 3586198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_unlock(); 3596198221fa0df0298513b35796f63f242ea97134eKeith Busch} 3606198221fa0df0298513b35796f63f242ea97134eKeith Busch 3616198221fa0df0298513b35796f63f242ea97134eKeith Buschstatic void nvme_end_io_acct(struct bio *bio, unsigned long start_time) 3626198221fa0df0298513b35796f63f242ea97134eKeith Busch{ 3636198221fa0df0298513b35796f63f242ea97134eKeith Busch struct gendisk *disk = bio->bi_bdev->bd_disk; 3646198221fa0df0298513b35796f63f242ea97134eKeith Busch const int rw = bio_data_dir(bio); 3656198221fa0df0298513b35796f63f242ea97134eKeith Busch unsigned long duration = jiffies - start_time; 3666198221fa0df0298513b35796f63f242ea97134eKeith Busch int cpu = part_stat_lock(); 3676198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_add(cpu, &disk->part0, ticks[rw], duration); 3686198221fa0df0298513b35796f63f242ea97134eKeith Busch part_round_stats(cpu, &disk->part0); 3696198221fa0df0298513b35796f63f242ea97134eKeith Busch part_dec_in_flight(&disk->part0, rw); 3706198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_unlock(); 3716198221fa0df0298513b35796f63f242ea97134eKeith Busch} 3726198221fa0df0298513b35796f63f242ea97134eKeith Busch 3735c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void bio_completion(struct nvme_dev *dev, void *ctx, 374b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion *cqe) 375b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 376eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = ctx; 377eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct bio *bio = iod->private; 378b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 status = le16_to_cpup(&cqe->status) >> 1; 379b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3809e59d091b0eb04f223ed037348e3d9e36f30e72bKeith Busch if (iod->nents) { 3812b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 382b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_data_dir(bio) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 3839e59d091b0eb04f223ed037348e3d9e36f30e72bKeith Busch nvme_end_io_acct(bio, iod->start_time); 3849e59d091b0eb04f223ed037348e3d9e36f30e72bKeith Busch } 385eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 386427e97080196548557b288517537ab7eb48c309fKeith Busch if (status) 3871ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, -EIO); 388427e97080196548557b288517537ab7eb48c309fKeith Busch else 3891ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, 0); 390b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 391b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 392184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* length is in bytes. gfp flags indicates whether we may sleep. */ 3935d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_setup_prps(struct nvme_dev *dev, struct nvme_common_command *cmd, 3945d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma struct nvme_iod *iod, int total_len, gfp_t gfp) 395ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox{ 39699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox struct dma_pool *pool; 397eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int length = total_len; 398eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct scatterlist *sg = iod->sg; 399ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int dma_len = sg_dma_len(sg); 400ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox u64 dma_addr = sg_dma_address(sg); 401ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int offset = offset_in_page(dma_addr); 402e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *prp_list; 403eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 404e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr_t prp_dma; 405eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int nprps, i; 406ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 407ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp1 = cpu_to_le64(dma_addr); 408ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox length -= (PAGE_SIZE - offset); 409ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= 0) 410eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 411ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 412ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len -= (PAGE_SIZE - offset); 413ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (dma_len) { 414ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr += (PAGE_SIZE - offset); 415ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } else { 416ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox sg = sg_next(sg); 417ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr = sg_dma_address(sg); 418ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len = sg_dma_len(sg); 419ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 420ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 421ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= PAGE_SIZE) { 422ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 423eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 424e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 425e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 426e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews nprps = DIV_ROUND_UP(length, PAGE_SIZE); 42799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (nprps <= (256 / 8)) { 42899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_small_pool; 429eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 0; 43099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } else { 43199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_page_pool; 432eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 1; 43399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 43499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 435b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 436b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (!prp_list) { 437b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 438eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 439eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return (total_len - length) + PAGE_SIZE; 440b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox } 441eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[0] = prp_list; 442eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->first_dma = prp_dma; 443e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews cmd->prp2 = cpu_to_le64(prp_dma); 444e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews i = 0; 445e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews for (;;) { 4467523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox if (i == PAGE_SIZE / 8) { 447e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *old_prp_list = prp_list; 448b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 449eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!prp_list) 450eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len - length; 451eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[iod->npages++] = prp_list; 4527523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox prp_list[0] = old_prp_list[i - 1]; 4537523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox old_prp_list[i - 1] = cpu_to_le64(prp_dma); 4547523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox i = 1; 455e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 456e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews prp_list[i++] = cpu_to_le64(dma_addr); 457e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len -= PAGE_SIZE; 458e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr += PAGE_SIZE; 459e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews length -= PAGE_SIZE; 460e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (length <= 0) 461e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews break; 462e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (dma_len > 0) 463e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews continue; 464e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews BUG_ON(dma_len < 0); 465e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews sg = sg_next(sg); 466e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr = sg_dma_address(sg); 467e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len = sg_dma_len(sg); 468ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 469ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 470eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 471ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox} 472ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 473427e97080196548557b288517537ab7eb48c309fKeith Buschstruct nvme_bio_pair { 474427e97080196548557b288517537ab7eb48c309fKeith Busch struct bio b1, b2, *parent; 475427e97080196548557b288517537ab7eb48c309fKeith Busch struct bio_vec *bv1, *bv2; 476427e97080196548557b288517537ab7eb48c309fKeith Busch int err; 477427e97080196548557b288517537ab7eb48c309fKeith Busch atomic_t cnt; 478427e97080196548557b288517537ab7eb48c309fKeith Busch}; 479427e97080196548557b288517537ab7eb48c309fKeith Busch 480427e97080196548557b288517537ab7eb48c309fKeith Buschstatic void nvme_bio_pair_endio(struct bio *bio, int err) 481427e97080196548557b288517537ab7eb48c309fKeith Busch{ 482427e97080196548557b288517537ab7eb48c309fKeith Busch struct nvme_bio_pair *bp = bio->bi_private; 483427e97080196548557b288517537ab7eb48c309fKeith Busch 484427e97080196548557b288517537ab7eb48c309fKeith Busch if (err) 485427e97080196548557b288517537ab7eb48c309fKeith Busch bp->err = err; 486427e97080196548557b288517537ab7eb48c309fKeith Busch 487427e97080196548557b288517537ab7eb48c309fKeith Busch if (atomic_dec_and_test(&bp->cnt)) { 488427e97080196548557b288517537ab7eb48c309fKeith Busch bio_endio(bp->parent, bp->err); 4891b56749e541ad59068582f2a28297843e243b856Keith Busch kfree(bp->bv1); 4901b56749e541ad59068582f2a28297843e243b856Keith Busch kfree(bp->bv2); 491427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp); 492427e97080196548557b288517537ab7eb48c309fKeith Busch } 493427e97080196548557b288517537ab7eb48c309fKeith Busch} 494427e97080196548557b288517537ab7eb48c309fKeith Busch 495427e97080196548557b288517537ab7eb48c309fKeith Buschstatic struct nvme_bio_pair *nvme_bio_split(struct bio *bio, int idx, 496427e97080196548557b288517537ab7eb48c309fKeith Busch int len, int offset) 497427e97080196548557b288517537ab7eb48c309fKeith Busch{ 498427e97080196548557b288517537ab7eb48c309fKeith Busch struct nvme_bio_pair *bp; 499427e97080196548557b288517537ab7eb48c309fKeith Busch 500427e97080196548557b288517537ab7eb48c309fKeith Busch BUG_ON(len > bio->bi_size); 501427e97080196548557b288517537ab7eb48c309fKeith Busch BUG_ON(idx > bio->bi_vcnt); 502427e97080196548557b288517537ab7eb48c309fKeith Busch 503427e97080196548557b288517537ab7eb48c309fKeith Busch bp = kmalloc(sizeof(*bp), GFP_ATOMIC); 504427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp) 505427e97080196548557b288517537ab7eb48c309fKeith Busch return NULL; 506427e97080196548557b288517537ab7eb48c309fKeith Busch bp->err = 0; 507427e97080196548557b288517537ab7eb48c309fKeith Busch 508427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1 = *bio; 509427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2 = *bio; 510427e97080196548557b288517537ab7eb48c309fKeith Busch 511427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_size = len; 512427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_size -= len; 513427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_vcnt = idx; 514427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_idx = idx; 515427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_sector += len >> 9; 516427e97080196548557b288517537ab7eb48c309fKeith Busch 517427e97080196548557b288517537ab7eb48c309fKeith Busch if (offset) { 518427e97080196548557b288517537ab7eb48c309fKeith Busch bp->bv1 = kmalloc(bio->bi_max_vecs * sizeof(struct bio_vec), 519427e97080196548557b288517537ab7eb48c309fKeith Busch GFP_ATOMIC); 520427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp->bv1) 521427e97080196548557b288517537ab7eb48c309fKeith Busch goto split_fail_1; 522427e97080196548557b288517537ab7eb48c309fKeith Busch 523427e97080196548557b288517537ab7eb48c309fKeith Busch bp->bv2 = kmalloc(bio->bi_max_vecs * sizeof(struct bio_vec), 524427e97080196548557b288517537ab7eb48c309fKeith Busch GFP_ATOMIC); 525427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp->bv2) 526427e97080196548557b288517537ab7eb48c309fKeith Busch goto split_fail_2; 527427e97080196548557b288517537ab7eb48c309fKeith Busch 528427e97080196548557b288517537ab7eb48c309fKeith Busch memcpy(bp->bv1, bio->bi_io_vec, 529427e97080196548557b288517537ab7eb48c309fKeith Busch bio->bi_max_vecs * sizeof(struct bio_vec)); 530427e97080196548557b288517537ab7eb48c309fKeith Busch memcpy(bp->bv2, bio->bi_io_vec, 531427e97080196548557b288517537ab7eb48c309fKeith Busch bio->bi_max_vecs * sizeof(struct bio_vec)); 532427e97080196548557b288517537ab7eb48c309fKeith Busch 533427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_io_vec = bp->bv1; 534427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_io_vec = bp->bv2; 535427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_io_vec[idx].bv_offset += offset; 536427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_io_vec[idx].bv_len -= offset; 537427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_io_vec[idx].bv_len = offset; 538427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_vcnt++; 539427e97080196548557b288517537ab7eb48c309fKeith Busch } else 540427e97080196548557b288517537ab7eb48c309fKeith Busch bp->bv1 = bp->bv2 = NULL; 541427e97080196548557b288517537ab7eb48c309fKeith Busch 542427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_private = bp; 543427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_private = bp; 544427e97080196548557b288517537ab7eb48c309fKeith Busch 545427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_end_io = nvme_bio_pair_endio; 546427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_end_io = nvme_bio_pair_endio; 547427e97080196548557b288517537ab7eb48c309fKeith Busch 548427e97080196548557b288517537ab7eb48c309fKeith Busch bp->parent = bio; 549427e97080196548557b288517537ab7eb48c309fKeith Busch atomic_set(&bp->cnt, 2); 550427e97080196548557b288517537ab7eb48c309fKeith Busch 551427e97080196548557b288517537ab7eb48c309fKeith Busch return bp; 552427e97080196548557b288517537ab7eb48c309fKeith Busch 553427e97080196548557b288517537ab7eb48c309fKeith Busch split_fail_2: 554427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp->bv1); 555427e97080196548557b288517537ab7eb48c309fKeith Busch split_fail_1: 556427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp); 557427e97080196548557b288517537ab7eb48c309fKeith Busch return NULL; 558427e97080196548557b288517537ab7eb48c309fKeith Busch} 559427e97080196548557b288517537ab7eb48c309fKeith Busch 560427e97080196548557b288517537ab7eb48c309fKeith Buschstatic int nvme_split_and_submit(struct bio *bio, struct nvme_queue *nvmeq, 561427e97080196548557b288517537ab7eb48c309fKeith Busch int idx, int len, int offset) 562427e97080196548557b288517537ab7eb48c309fKeith Busch{ 563427e97080196548557b288517537ab7eb48c309fKeith Busch struct nvme_bio_pair *bp = nvme_bio_split(bio, idx, len, offset); 564427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp) 565427e97080196548557b288517537ab7eb48c309fKeith Busch return -ENOMEM; 566427e97080196548557b288517537ab7eb48c309fKeith Busch 567427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 568427e97080196548557b288517537ab7eb48c309fKeith Busch add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 569427e97080196548557b288517537ab7eb48c309fKeith Busch bio_list_add(&nvmeq->sq_cong, &bp->b1); 570427e97080196548557b288517537ab7eb48c309fKeith Busch bio_list_add(&nvmeq->sq_cong, &bp->b2); 571427e97080196548557b288517537ab7eb48c309fKeith Busch 572427e97080196548557b288517537ab7eb48c309fKeith Busch return 0; 573427e97080196548557b288517537ab7eb48c309fKeith Busch} 574427e97080196548557b288517537ab7eb48c309fKeith Busch 5751ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox/* NVMe scatterlists require no holes in the virtual address */ 5761ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox#define BIOVEC_NOT_VIRT_MERGEABLE(vec1, vec2) ((vec2)->bv_offset || \ 5771ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox (((vec1)->bv_offset + (vec1)->bv_len) % PAGE_SIZE)) 5781ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox 579427e97080196548557b288517537ab7eb48c309fKeith Buschstatic int nvme_map_bio(struct nvme_queue *nvmeq, struct nvme_iod *iod, 580b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio, enum dma_data_direction dma_dir, int psegs) 581b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 582768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct bio_vec *bvec, *bvprv = NULL; 583768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct scatterlist *sg = NULL; 584159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch int i, length = 0, nsegs = 0, split_len = bio->bi_size; 585159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch 586159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (nvmeq->dev->stripe_size) 587159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch split_len = nvmeq->dev->stripe_size - 588159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch ((bio->bi_sector << 9) & (nvmeq->dev->stripe_size - 1)); 589b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 590eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg_init_table(iod->sg, psegs); 591b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_for_each_segment(bvec, bio, i) { 592768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox if (bvprv && BIOVEC_PHYS_MERGEABLE(bvprv, bvec)) { 593768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg->length += bvec->bv_len; 594768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } else { 5951ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox if (bvprv && BIOVEC_NOT_VIRT_MERGEABLE(bvprv, bvec)) 596427e97080196548557b288517537ab7eb48c309fKeith Busch return nvme_split_and_submit(bio, nvmeq, i, 597427e97080196548557b288517537ab7eb48c309fKeith Busch length, 0); 598427e97080196548557b288517537ab7eb48c309fKeith Busch 599eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = sg ? sg + 1 : iod->sg; 600768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_set_page(sg, bvec->bv_page, bvec->bv_len, 601768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvec->bv_offset); 602768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox nsegs++; 603768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } 604159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch 605159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (split_len - length < bvec->bv_len) 606159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch return nvme_split_and_submit(bio, nvmeq, i, split_len, 607159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch split_len - length); 6081ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length += bvec->bv_len; 609768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvprv = bvec; 610b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 611eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->nents = nsegs; 612768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_mark_end(sg); 613427e97080196548557b288517537ab7eb48c309fKeith Busch if (dma_map_sg(nvmeq->q_dmadev, iod->sg, iod->nents, dma_dir) == 0) 6141ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return -ENOMEM; 615427e97080196548557b288517537ab7eb48c309fKeith Busch 616159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch BUG_ON(length != bio->bi_size); 6171ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return length; 618b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 619b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6200e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch/* 6210e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * We reuse the small pool to allocate the 16-byte range here as it is not 6220e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * worth having a special pool for these or additional cases to handle freeing 6230e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * the iod. 6240e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch */ 6250e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic int nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, 6260e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct bio *bio, struct nvme_iod *iod, int cmdid) 6270e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 6280e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_dsm_range *range; 6290e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 6300e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6310e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range = dma_pool_alloc(nvmeq->dev->prp_small_pool, GFP_ATOMIC, 6320e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch &iod->first_dma); 6330e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (!range) 6340e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return -ENOMEM; 6350e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6360e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod_list(iod)[0] = (__le64 *)range; 6370e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod->npages = 0; 6380e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6390e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->cattr = cpu_to_le32(0); 6400e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->nlb = cpu_to_le32(bio->bi_size >> ns->lba_shift); 641063cc6d5591ea9c0631b81ac5c7b829d99738b2fMatthew Wilcox range->slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_sector)); 6420e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6430e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch memset(cmnd, 0, sizeof(*cmnd)); 6440e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.opcode = nvme_cmd_dsm; 6450e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.command_id = cmdid; 6460e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); 6470e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.prp1 = cpu_to_le64(iod->first_dma); 6480e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nr = 0; 6490e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); 6500e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6510e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (++nvmeq->sq_tail == nvmeq->q_depth) 6520e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvmeq->sq_tail = 0; 6530e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch writel(nvmeq->sq_tail, nvmeq->q_db); 6540e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6550e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return 0; 6560e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 6570e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 65800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcoxstatic int nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, 65900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid) 66000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 66100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 66200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 66300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 66400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.opcode = nvme_cmd_flush; 66500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.command_id = cmdid; 66600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.nsid = cpu_to_le32(ns->ns_id); 66700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 66800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 66900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox nvmeq->sq_tail = 0; 67000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 67100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 67200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return 0; 67300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 67400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 6755d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns) 67600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 67700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid = alloc_cmdid(nvmeq, (void *)CMD_CTX_FLUSH, 678ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox special_completion, NVME_IO_TIMEOUT); 67900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (unlikely(cmdid < 0)) 68000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return cmdid; 68100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 68200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 68300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 68400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 685184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 686184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 687184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 688b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns, 689b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio) 690b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 691ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox struct nvme_command *cmnd; 692eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 693b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox enum dma_data_direction dma_dir; 6941287dabd345f447bbe0f7a99fc95ab89bcfc0f5dWei Yongjun int cmdid, length, result; 695b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 control; 696b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 dsmgmt; 697b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int psegs = bio_phys_segments(ns->queue, bio); 698b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 69900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && psegs) { 70000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox result = nvme_submit_flush_data(nvmeq, ns); 70100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (result) 70200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return result; 70300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox } 70400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 7051287dabd345f447bbe0f7a99fc95ab89bcfc0f5dWei Yongjun result = -ENOMEM; 706eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(psegs, bio->bi_size, GFP_ATOMIC); 707eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!iod) 708eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox goto nomem; 709eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->private = bio; 710b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 711eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = -EBUSY; 712ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox cmdid = alloc_cmdid(nvmeq, iod, bio_completion, NVME_IO_TIMEOUT); 713b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (unlikely(cmdid < 0)) 714eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 715b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7160e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (bio->bi_rw & REQ_DISCARD) { 7170e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch result = nvme_submit_discard(nvmeq, ns, bio, iod, cmdid); 7180e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (result) 7190e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch goto free_cmdid; 7200e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return result; 7210e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch } 72200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && !psegs) 72300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 72400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 725b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control = 0; 726b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_FUA) 727b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_FUA; 728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & (REQ_FAILFAST_DEV | REQ_RAHEAD)) 729b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_LR; 730b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 731b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt = 0; 732b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_RAHEAD) 733b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; 734b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 735ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 736b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 737b8deb62cf271fa9381edc8cf52bcae2f0225c55aMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 738b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio_data_dir(bio)) { 739ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_write; 740b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_TO_DEVICE; 741b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } else { 742ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_read; 743b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_FROM_DEVICE; 744b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 745b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 746427e97080196548557b288517537ab7eb48c309fKeith Busch result = nvme_map_bio(nvmeq, iod, bio, dma_dir, psegs); 747427e97080196548557b288517537ab7eb48c309fKeith Busch if (result <= 0) 748859361a228258edf4821d9f5635825033eca78e8Keith Busch goto free_cmdid; 7491ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length = result; 750b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 751ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.command_id = cmdid; 752ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.nsid = cpu_to_le32(ns->ns_id); 753eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(nvmeq->dev, &cmnd->common, iod, length, 754eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_ATOMIC); 755063cc6d5591ea9c0631b81ac5c7b829d99738b2fMatthew Wilcox cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_sector)); 7561ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox cmnd->rw.length = cpu_to_le16((length >> ns->lba_shift) - 1); 757ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.control = cpu_to_le16(control); 758ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); 759b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7606198221fa0df0298513b35796f63f242ea97134eKeith Busch nvme_start_io_acct(bio); 761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = 0; 7637547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 764b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7651974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox return 0; 7661974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox 767859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid: 768859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid(nvmeq, cmdid, NULL); 769eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 770eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(nvmeq->dev, iod); 771eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox nomem: 772eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox return result; 773b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 774b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 775e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcoxstatic int nvme_process_cq(struct nvme_queue *nvmeq) 776b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 777821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 head, phase; 778b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 779b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = nvmeq->cq_head; 780821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = nvmeq->cq_phase; 781b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 782b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (;;) { 783c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 784c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 785b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion cqe = nvmeq->cqes[head]; 786821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != phase) 787b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox break; 788b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 789b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++head == nvmeq->q_depth) { 790b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = 0; 791821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = !phase; 792b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 793b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 794c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = free_cmdid(nvmeq, cqe.command_id, &fn); 7955c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox fn(nvmeq->dev, ctx, &cqe); 796b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 797b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 798b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* If the controller ignores the cq head doorbell and continuously 799b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * writes to the queue, it is theoretically possible to wrap around 800b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the queue twice and mistakenly return IRQ_NONE. Linux only 801b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * requires that 0.1% of your interrupts are handled, so this isn't 802b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * a big problem. 803b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 804821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 805e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox return 0; 806b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 807b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu writel(head, nvmeq->q_db + nvmeq->dev->db_stride); 808b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = head; 809821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = phase; 810b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 811e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvmeq->cqe_seen = 1; 812e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox return 1; 813b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 814b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8157d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcoxstatic void nvme_make_request(struct request_queue *q, struct bio *bio) 8167d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox{ 8177d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox struct nvme_ns *ns = q->queuedata; 8187d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(ns->dev); 8197d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox int result = -EBUSY; 8207d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 821cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch if (!nvmeq) { 822cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch put_nvmeq(NULL); 823cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch bio_endio(bio, -EIO); 824cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return; 825cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch } 826cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 8277d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 828224042742582c9938788b81165180c876e997a07Keith Busch if (!nvmeq->q_suspended && bio_list_empty(&nvmeq->sq_cong)) 8297d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox result = nvme_submit_bio_queue(nvmeq, ns, bio); 8307d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox if (unlikely(result)) { 8317d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 8327d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 8337d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 8347d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox } 8357d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 8367d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox nvme_process_cq(nvmeq); 8377d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 8387d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox put_nvmeq(nvmeq); 8397d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox} 8407d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 841b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_irq(int irq, void *data) 842b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 84358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox irqreturn_t result; 84458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 84558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_lock(&nvmeq->q_lock); 846e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvme_process_cq(nvmeq); 847e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; 848e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvmeq->cqe_seen = 0; 84958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_unlock(&nvmeq->q_lock); 85058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return result; 85158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 85258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 85358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic irqreturn_t nvme_irq_check(int irq, void *data) 85458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox{ 85558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 85658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 85758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 85858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_NONE; 85958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_WAKE_THREAD; 86058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 86158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 8623c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic void nvme_abort_command(struct nvme_queue *nvmeq, int cmdid) 8633c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 8643c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 865c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cancel_cmdid(nvmeq, cmdid, NULL); 8663c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 8673c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 8683c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 869c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstruct sync_cmd_info { 870c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct task_struct *task; 871c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox u32 result; 872c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox int status; 873c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox}; 874c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 8755c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void sync_completion(struct nvme_dev *dev, void *ctx, 876c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 877c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 878c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct sync_cmd_info *cmdinfo = ctx; 879c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->result = le32_to_cpup(&cqe->result); 880c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 881c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox wake_up_process(cmdinfo->task); 882c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 883c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 884b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 885b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Returns 0 on success. If the result is negative, it's a Linux error code; 886b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * if the result is positive, it's an NVM Express status code 887b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 8885d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_sync_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd, 8895d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma u32 *result, unsigned timeout) 890b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 891b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 892b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct sync_cmd_info cmdinfo; 893b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 894b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.task = current; 895b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.status = -EINTR; 896b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 897c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdid = alloc_cmdid_killable(nvmeq, &cmdinfo, sync_completion, 898e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox timeout); 899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid < 0) 900b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 901b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmd->common.command_id = cmdid; 902b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9033c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox set_current_state(TASK_KILLABLE); 9043c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_submit_cmd(nvmeq, cmd); 90578f8d2577bd79ce9d62f4d9e6d3b895bd1dd1d1dKeith Busch schedule_timeout(timeout); 906b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9073c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox if (cmdinfo.status == -EINTR) { 9083c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_abort_command(nvmeq, cmdid); 9093c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox return -EINTR; 9103c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox } 9113c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 912b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 913b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox *result = cmdinfo.result; 914b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 915b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdinfo.status; 916b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 917b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9184d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_submit_async_cmd(struct nvme_queue *nvmeq, 9194d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_command *cmd, 9204d115420707afcabe77d2535e092356df6664b70Keith Busch struct async_cmd_info *cmdinfo, unsigned timeout) 9214d115420707afcabe77d2535e092356df6664b70Keith Busch{ 9224d115420707afcabe77d2535e092356df6664b70Keith Busch int cmdid; 9234d115420707afcabe77d2535e092356df6664b70Keith Busch 9244d115420707afcabe77d2535e092356df6664b70Keith Busch cmdid = alloc_cmdid_killable(nvmeq, cmdinfo, async_completion, timeout); 9254d115420707afcabe77d2535e092356df6664b70Keith Busch if (cmdid < 0) 9264d115420707afcabe77d2535e092356df6664b70Keith Busch return cmdid; 9274d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo->status = -EINTR; 9284d115420707afcabe77d2535e092356df6664b70Keith Busch cmd->common.command_id = cmdid; 9294d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_submit_cmd(nvmeq, cmd); 9304d115420707afcabe77d2535e092356df6664b70Keith Busch return 0; 9314d115420707afcabe77d2535e092356df6664b70Keith Busch} 9324d115420707afcabe77d2535e092356df6664b70Keith Busch 9335d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, 934b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 *result) 935b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 936e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return nvme_submit_sync_cmd(dev->queues[0], cmd, result, ADMIN_TIMEOUT); 937b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 938b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9394d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_submit_admin_cmd_async(struct nvme_dev *dev, 9404d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_command *cmd, struct async_cmd_info *cmdinfo) 9414d115420707afcabe77d2535e092356df6664b70Keith Busch{ 9424d115420707afcabe77d2535e092356df6664b70Keith Busch return nvme_submit_async_cmd(dev->queues[0], cmd, cmdinfo, 9434d115420707afcabe77d2535e092356df6664b70Keith Busch ADMIN_TIMEOUT); 9444d115420707afcabe77d2535e092356df6664b70Keith Busch} 9454d115420707afcabe77d2535e092356df6664b70Keith Busch 946b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 947b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 948b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 949b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 950b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 951b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 952b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.opcode = opcode; 953b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.qid = cpu_to_le16(id); 954b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 955b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 956b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 957b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 958b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 959b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 960b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 961b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 962b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 963b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 964b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 965b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 966b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 967b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 968b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 969b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.opcode = nvme_admin_create_cq; 970b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 971b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cqid = cpu_to_le16(qid); 972b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 973b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cq_flags = cpu_to_le16(flags); 974b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 975b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 976b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 977b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 978b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 979b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 980b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 981b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 982b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 983b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 984b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 985b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 986b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 987b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 988b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 989b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 990b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.opcode = nvme_admin_create_sq; 991b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 992b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sqid = cpu_to_le16(qid); 993b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 994b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sq_flags = cpu_to_le16(flags); 995b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.cqid = cpu_to_le16(qid); 996b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 997b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 998b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 999b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 1000b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1001b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1002b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1003b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 1004b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1005b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 1006b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1007b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1008b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 1009b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1010b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 1011b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1012b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10135d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns, 1014bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox dma_addr_t dma_addr) 1015bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 1016bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 1017bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 1018bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 1019bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.opcode = nvme_admin_identify; 1020bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.nsid = cpu_to_le32(nsid); 1021bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.prp1 = cpu_to_le64(dma_addr); 1022bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.cns = cpu_to_le32(cns); 1023bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 1024bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, NULL); 1025bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 1026bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 10275d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid, 102808df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr_t dma_addr, u32 *result) 1029bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 1030bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 1031bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 1032bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 1033bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.opcode = nvme_admin_get_features; 1034a42ceccef0c43b46ff6bc1b12a7c1076ef243df1Keith Busch c.features.nsid = cpu_to_le32(nsid); 1035bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 1036bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.fid = cpu_to_le32(fid); 1037bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 103808df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch return nvme_submit_admin_cmd(dev, &c, result); 1039df3481399042200792822b6243e36a95a557b57eMatthew Wilcox} 1040df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 10415d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11, 10425d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma dma_addr_t dma_addr, u32 *result) 1043df3481399042200792822b6243e36a95a557b57eMatthew Wilcox{ 1044df3481399042200792822b6243e36a95a557b57eMatthew Wilcox struct nvme_command c; 1045df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 1046df3481399042200792822b6243e36a95a557b57eMatthew Wilcox memset(&c, 0, sizeof(c)); 1047df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.opcode = nvme_admin_set_features; 1048df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 1049df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.fid = cpu_to_le32(fid); 1050df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.dword11 = cpu_to_le32(dword11); 1051df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 1052bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, result); 1053bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 1054bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 1055a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox/** 1056c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * nvme_abort_cmd - Attempt aborting a command 1057c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * @cmdid: Command id of a timed out IO 1058c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * @queue: The queue with timed out IO 1059c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * 1060c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * Schedule controller reset if the command was already aborted once before and 1061c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * still hasn't been returned to the driver, or if this is the admin queue. 1062c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch */ 1063c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Buschstatic void nvme_abort_cmd(int cmdid, struct nvme_queue *nvmeq) 1064c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch{ 1065c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch int a_cmdid; 1066c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch struct nvme_command cmd; 1067c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch struct nvme_dev *dev = nvmeq->dev; 1068c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 1069c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1070c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (!nvmeq->qid || info[cmdid].aborted) { 1071c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (work_busy(&dev->reset_work)) 1072c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1073c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch list_del_init(&dev->node); 1074c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev_warn(&dev->pci_dev->dev, 1075c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch "I/O %d QID %d timeout, reset controller\n", cmdid, 1076c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid); 1077c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch INIT_WORK(&dev->reset_work, nvme_reset_failed_dev); 1078c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch queue_work(nvme_workq, &dev->reset_work); 1079c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1080c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch } 1081c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1082c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (!dev->abort_limit) 1083c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1084c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1085c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch a_cmdid = alloc_cmdid(dev->queues[0], CMD_CTX_ABORT, special_completion, 1086c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch ADMIN_TIMEOUT); 1087c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (a_cmdid < 0) 1088c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1089c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1090c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch memset(&cmd, 0, sizeof(cmd)); 1091c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.opcode = nvme_admin_abort_cmd; 1092c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.cid = cmdid; 1093c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.sqid = cpu_to_le16(nvmeq->qid); 1094c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.command_id = a_cmdid; 1095c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1096c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch --dev->abort_limit; 1097c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch info[cmdid].aborted = 1; 1098c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch info[cmdid].timeout = jiffies + ADMIN_TIMEOUT; 1099c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1100c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev_warn(nvmeq->q_dmadev, "Aborting I/O %d QID %d\n", cmdid, 1101c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid); 1102c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvme_submit_cmd(dev->queues[0], &cmd); 1103c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch} 1104c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1105c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch/** 1106a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * nvme_cancel_ios - Cancel outstanding I/Os 1107a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @queue: The queue to cancel I/Os on 1108a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @timeout: True to only cancel I/Os which have timed out 1109a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox */ 1110a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcoxstatic void nvme_cancel_ios(struct nvme_queue *nvmeq, bool timeout) 1111a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox{ 1112a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int depth = nvmeq->q_depth - 1; 1113a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 1114a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox unsigned long now = jiffies; 1115a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int cmdid; 1116a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1117a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox for_each_set_bit(cmdid, nvmeq->cmdid_data, depth) { 1118a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox void *ctx; 1119a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_completion_fn fn; 1120a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox static struct nvme_completion cqe = { 1121af2d9ca744af5e03390eeb3864d08ce75c860899Matthew Wilcox .status = cpu_to_le16(NVME_SC_ABORT_REQ << 1), 1122a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox }; 1123a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1124a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox if (timeout && !time_after(now, info[cmdid].timeout)) 1125a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox continue; 1126053ab702cc2702f25a97ead087ed344b864785b7Keith Busch if (info[cmdid].ctx == CMD_CTX_CANCELLED) 1127053ab702cc2702f25a97ead087ed344b864785b7Keith Busch continue; 1128c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (timeout && nvmeq->dev->initialized) { 1129c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvme_abort_cmd(cmdid, nvmeq); 1130c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch continue; 1131c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch } 1132c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d QID %d\n", cmdid, 1133c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid); 1134a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox ctx = cancel_cmdid(nvmeq, cmdid, &fn); 1135a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox fn(nvmeq->dev, ctx, &cqe); 1136a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox } 1137a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox} 1138a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1139224042742582c9938788b81165180c876e997a07Keith Buschstatic void nvme_free_queue(struct nvme_queue *nvmeq) 11409e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox{ 1141224042742582c9938788b81165180c876e997a07Keith Busch spin_lock_irq(&nvmeq->q_lock); 1142224042742582c9938788b81165180c876e997a07Keith Busch while (bio_list_peek(&nvmeq->sq_cong)) { 1143224042742582c9938788b81165180c876e997a07Keith Busch struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 1144224042742582c9938788b81165180c876e997a07Keith Busch bio_endio(bio, -EIO); 1145224042742582c9938788b81165180c876e997a07Keith Busch } 1146224042742582c9938788b81165180c876e997a07Keith Busch spin_unlock_irq(&nvmeq->q_lock); 1147224042742582c9938788b81165180c876e997a07Keith Busch 11489e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 11499e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 11509e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 11519e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 11529e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox kfree(nvmeq); 11539e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox} 11549e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 1155a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Buschstatic void nvme_free_queues(struct nvme_dev *dev, int lowest) 1156224042742582c9938788b81165180c876e997a07Keith Busch{ 1157224042742582c9938788b81165180c876e997a07Keith Busch int i; 1158224042742582c9938788b81165180c876e997a07Keith Busch 1159a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch for (i = dev->queue_count - 1; i >= lowest; i--) { 1160224042742582c9938788b81165180c876e997a07Keith Busch nvme_free_queue(dev->queues[i]); 1161224042742582c9938788b81165180c876e997a07Keith Busch dev->queue_count--; 1162224042742582c9938788b81165180c876e997a07Keith Busch dev->queues[i] = NULL; 1163224042742582c9938788b81165180c876e997a07Keith Busch } 1164224042742582c9938788b81165180c876e997a07Keith Busch} 1165224042742582c9938788b81165180c876e997a07Keith Busch 11664d115420707afcabe77d2535e092356df6664b70Keith Busch/** 11674d115420707afcabe77d2535e092356df6664b70Keith Busch * nvme_suspend_queue - put queue into suspended state 11684d115420707afcabe77d2535e092356df6664b70Keith Busch * @nvmeq - queue to suspend 11694d115420707afcabe77d2535e092356df6664b70Keith Busch * 11704d115420707afcabe77d2535e092356df6664b70Keith Busch * Returns 1 if already suspended, 0 otherwise. 11714d115420707afcabe77d2535e092356df6664b70Keith Busch */ 11724d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_suspend_queue(struct nvme_queue *nvmeq) 1173b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 11744d115420707afcabe77d2535e092356df6664b70Keith Busch int vector = nvmeq->dev->entry[nvmeq->cq_vector].vector; 1175b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1176a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1177224042742582c9938788b81165180c876e997a07Keith Busch if (nvmeq->q_suspended) { 1178224042742582c9938788b81165180c876e997a07Keith Busch spin_unlock_irq(&nvmeq->q_lock); 11794d115420707afcabe77d2535e092356df6664b70Keith Busch return 1; 11803295874b6074d749516d6decd43afad7bf6e38ffKeith Busch } 1181224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->q_suspended = 1; 1182a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1183a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1184aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox irq_set_affinity_hint(vector, NULL); 1185aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox free_irq(vector, nvmeq); 1186b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11874d115420707afcabe77d2535e092356df6664b70Keith Busch return 0; 11884d115420707afcabe77d2535e092356df6664b70Keith Busch} 11894d115420707afcabe77d2535e092356df6664b70Keith Busch 11904d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_clear_queue(struct nvme_queue *nvmeq) 11914d115420707afcabe77d2535e092356df6664b70Keith Busch{ 11924d115420707afcabe77d2535e092356df6664b70Keith Busch spin_lock_irq(&nvmeq->q_lock); 11934d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_process_cq(nvmeq); 11944d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_cancel_ios(nvmeq, false); 11954d115420707afcabe77d2535e092356df6664b70Keith Busch spin_unlock_irq(&nvmeq->q_lock); 11964d115420707afcabe77d2535e092356df6664b70Keith Busch} 11974d115420707afcabe77d2535e092356df6664b70Keith Busch 11984d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_disable_queue(struct nvme_dev *dev, int qid) 11994d115420707afcabe77d2535e092356df6664b70Keith Busch{ 12004d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = dev->queues[qid]; 12014d115420707afcabe77d2535e092356df6664b70Keith Busch 12024d115420707afcabe77d2535e092356df6664b70Keith Busch if (!nvmeq) 12034d115420707afcabe77d2535e092356df6664b70Keith Busch return; 12044d115420707afcabe77d2535e092356df6664b70Keith Busch if (nvme_suspend_queue(nvmeq)) 12054d115420707afcabe77d2535e092356df6664b70Keith Busch return; 12064d115420707afcabe77d2535e092356df6664b70Keith Busch 12070e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch /* Don't tell the adapter to delete the admin queue. 12080e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch * Don't tell a removed adapter to delete IO queues. */ 12090e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch if (qid && readl(&dev->bar->csts) != -1) { 1210b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1211b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1212b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 12134d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_clear_queue(nvmeq); 1214b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1215b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1216b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 1217b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int depth, int vector) 1218b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1219b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1220224042742582c9938788b81165180c876e997a07Keith Busch unsigned extra = nvme_queue_extra(depth); 1221b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq) + extra, GFP_KERNEL); 1222b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq) 1223b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1224b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1225b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cqes = dma_alloc_coherent(dmadev, CQ_SIZE(depth), 1226b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->cq_dma_addr, GFP_KERNEL); 1227b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->cqes) 1228b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 1229b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset((void *)nvmeq->cqes, 0, CQ_SIZE(depth)); 1230b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1231b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds = dma_alloc_coherent(dmadev, SQ_SIZE(depth), 1232b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->sq_dma_addr, GFP_KERNEL); 1233b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->sq_cmds) 1234b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_cqdma; 1235b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1236b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_dmadev = dmadev; 1237091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvmeq->dev = dev; 1238b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_init(&nvmeq->q_lock); 1239b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = 0; 1240821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = 1; 1241b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox init_waitqueue_head(&nvmeq->sq_full); 12421fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox init_waitqueue_entry(&nvmeq->sq_cong_wait, nvme_thread); 1243b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_init(&nvmeq->sq_cong); 1244b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 1245b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_depth = depth; 1246b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_vector = vector; 1247c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid = qid; 1248224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->q_suspended = 1; 1249224042742582c9938788b81165180c876e997a07Keith Busch dev->queue_count++; 1250b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1251b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 1252b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1253b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_cqdma: 125468b8eca5f882230e4991df0db0a3094f49420a90Keith Busch dma_free_coherent(dmadev, CQ_SIZE(depth), (void *)nvmeq->cqes, 1255b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_dma_addr); 1256b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 1257b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 1258b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1259b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1260b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12613001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcoxstatic int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 12623001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox const char *name) 12633001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox{ 126458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if (use_threaded_interrupts) 126558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 1266481e5bad84239b01415b888df2040c1860ae3cfdMichael Opdenacker nvme_irq_check, nvme_irq, IRQF_SHARED, 126758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox name, nvmeq); 12683001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 1269481e5bad84239b01415b888df2040c1860ae3cfdMichael Opdenacker IRQF_SHARED, name, nvmeq); 12703001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox} 12713001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox 1272224042742582c9938788b81165180c876e997a07Keith Buschstatic void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) 1273b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1274224042742582c9938788b81165180c876e997a07Keith Busch struct nvme_dev *dev = nvmeq->dev; 1275224042742582c9938788b81165180c876e997a07Keith Busch unsigned extra = nvme_queue_extra(nvmeq->q_depth); 1276b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1277224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->sq_tail = 0; 1278224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->cq_head = 0; 1279224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->cq_phase = 1; 1280b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 1281224042742582c9938788b81165180c876e997a07Keith Busch memset(nvmeq->cmdid_data, 0, extra); 1282224042742582c9938788b81165180c876e997a07Keith Busch memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); 1283224042742582c9938788b81165180c876e997a07Keith Busch nvme_cancel_ios(nvmeq, false); 1284224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->q_suspended = 0; 1285224042742582c9938788b81165180c876e997a07Keith Busch} 1286224042742582c9938788b81165180c876e997a07Keith Busch 1287224042742582c9938788b81165180c876e997a07Keith Buschstatic int nvme_create_queue(struct nvme_queue *nvmeq, int qid) 1288224042742582c9938788b81165180c876e997a07Keith Busch{ 1289224042742582c9938788b81165180c876e997a07Keith Busch struct nvme_dev *dev = nvmeq->dev; 1290224042742582c9938788b81165180c876e997a07Keith Busch int result; 12913f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox 1292b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_cq(dev, qid, nvmeq); 1293b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1294224042742582c9938788b81165180c876e997a07Keith Busch return result; 1295b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1296b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_sq(dev, qid, nvmeq); 1297b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1298b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_cq; 1299b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 13003001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme"); 1301b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1302b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_sq; 1303b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 13040a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1305224042742582c9938788b81165180c876e997a07Keith Busch nvme_init_queue(nvmeq, qid); 13060a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1307224042742582c9938788b81165180c876e997a07Keith Busch 1308224042742582c9938788b81165180c876e997a07Keith Busch return result; 1309b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1310b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_sq: 1311b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1312b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_cq: 1313b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1314224042742582c9938788b81165180c876e997a07Keith Busch return result; 1315b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1316b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1317ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_wait_ready(struct nvme_dev *dev, u64 cap, bool enabled) 1318ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 1319ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox unsigned long timeout; 1320ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox u32 bit = enabled ? NVME_CSTS_RDY : 0; 1321ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1322ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; 1323ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1324ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox while ((readl(&dev->bar->csts) & NVME_CSTS_RDY) != bit) { 1325ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox msleep(100); 1326ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (fatal_signal_pending(current)) 1327ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return -EINTR; 1328ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (time_after(jiffies, timeout)) { 1329ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox dev_err(&dev->pci_dev->dev, 1330ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox "Device not ready; aborting initialisation\n"); 1331ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return -ENODEV; 1332ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox } 1333ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox } 1334ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1335ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return 0; 1336ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1337ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1338ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox/* 1339ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * If the device has been passed off to us in an enabled state, just clear 1340ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * the enabled bit. The spec says we should set the 'shutdown notification 1341ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * bits', but doing so may cause the device to complete commands to the 1342ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * admin queue ... and we don't know what memory that might be pointing at! 1343ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox */ 1344ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_disable_ctrl(struct nvme_dev *dev, u64 cap) 1345ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 134644af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox u32 cc = readl(&dev->bar->cc); 134744af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox 134844af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox if (cc & NVME_CC_ENABLE) 134944af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox writel(cc & ~NVME_CC_ENABLE, &dev->bar->cc); 1350ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return nvme_wait_ready(dev, cap, false); 1351ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1352ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1353ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap) 1354ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 1355ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return nvme_wait_ready(dev, cap, true); 1356ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1357ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 13581894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Buschstatic int nvme_shutdown_ctrl(struct nvme_dev *dev) 13591894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch{ 13601894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch unsigned long timeout; 13611894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch u32 cc; 13621894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 13631894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch cc = (readl(&dev->bar->cc) & ~NVME_CC_SHN_MASK) | NVME_CC_SHN_NORMAL; 13641894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch writel(cc, &dev->bar->cc); 13651894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 13661894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch timeout = 2 * HZ + jiffies; 13671894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch while ((readl(&dev->bar->csts) & NVME_CSTS_SHST_MASK) != 13681894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch NVME_CSTS_SHST_CMPLT) { 13691894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch msleep(100); 13701894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch if (fatal_signal_pending(current)) 13711894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch return -EINTR; 13721894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch if (time_after(jiffies, timeout)) { 13731894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch dev_err(&dev->pci_dev->dev, 13741894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch "Device shutdown incomplete; abort shutdown\n"); 13751894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch return -ENODEV; 13761894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch } 13771894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch } 13781894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 13791894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch return 0; 13801894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch} 13811894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 13828d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_configure_admin_queue(struct nvme_dev *dev) 1383b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1384ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox int result; 1385b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 aqa; 1386ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox u64 cap = readq(&dev->bar->cap); 1387b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq; 1388b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1389ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox result = nvme_disable_ctrl(dev, cap); 1390ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (result < 0) 1391ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return result; 1392b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1393cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvmeq = dev->queues[0]; 1394cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch if (!nvmeq) { 1395cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvmeq = nvme_alloc_queue(dev, 0, 64, 0); 1396cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch if (!nvmeq) 1397cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return -ENOMEM; 1398cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch dev->queues[0] = nvmeq; 1399cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch } 1400b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1401b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa = nvmeq->q_depth - 1; 1402b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa |= aqa << 16; 1403b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1404b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config = NVME_CC_ENABLE | NVME_CC_CSS_NVM; 1405b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= (PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; 1406b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; 14077f53f9d2424533256ae86f7df5661a17de743de8Matthew Wilcox dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; 1408b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1409b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(aqa, &dev->bar->aqa); 1410b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->sq_dma_addr, &dev->bar->asq); 1411b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->cq_dma_addr, &dev->bar->acq); 1412b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(dev->ctrl_config, &dev->bar->cc); 1413b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1414ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox result = nvme_enable_ctrl(dev, cap); 1415025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1416cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return result; 14179e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 14183001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme admin"); 1419025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1420cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return result; 1421025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch 14220a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1423224042742582c9938788b81165180c876e997a07Keith Busch nvme_init_queue(nvmeq, 0); 14240a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1425b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1426b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1427b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14285d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermastruct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, 1429eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned long addr, unsigned length) 1430b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 143136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox int i, err, count, nents, offset; 14327fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct scatterlist *sg; 14337fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct page **pages; 1434eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 143536c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 143636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (addr & 3) 1437eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 14385460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter if (!length || length > INT_MAX - PAGE_SIZE) 1439eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 14407fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 144136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox offset = offset_in_page(addr); 14427fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox count = DIV_ROUND_UP(offset + length, PAGE_SIZE); 14437fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox pages = kcalloc(count, sizeof(*pages), GFP_KERNEL); 144422fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter if (!pages) 144522fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter return ERR_PTR(-ENOMEM); 144636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 144736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = get_user_pages_fast(addr, count, 1, pages); 144836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (err < count) { 144936c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox count = err; 145036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = -EFAULT; 145136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox goto put_pages; 145236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox } 14537fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 1454eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(count, length, GFP_KERNEL); 1455eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = iod->sg; 145636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox sg_init_table(sg, count); 1457d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox for (i = 0; i < count; i++) { 1458d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox sg_set_page(&sg[i], pages[i], 14595460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter min_t(unsigned, length, PAGE_SIZE - offset), 14605460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter offset); 1461d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox length -= (PAGE_SIZE - offset); 1462d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox offset = 0; 14637fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox } 1464fe304c43c6d63e29ed4fc46a874d7a74313788c5Matthew Wilcox sg_mark_end(&sg[i - 1]); 14651c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox iod->nents = count; 14667fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 14677fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox err = -ENOMEM; 14687fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox nents = dma_map_sg(&dev->pci_dev->dev, sg, count, 14697fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 147036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (!nents) 1471eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 1472b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14737fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1474eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 1475b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1476eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 1477eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 14787fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_pages: 14797fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox for (i = 0; i < count; i++) 14807fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_page(pages[i]); 14817fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1482eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(err); 14837fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1484b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14855d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_unmap_user_pages(struct nvme_dev *dev, int write, 14861c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox struct nvme_iod *iod) 14877fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox{ 14881c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox int i; 1489b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14901c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 14911c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 14927fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 14931c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox for (i = 0; i < iod->nents; i++) 14941c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox put_page(sg_page(&iod->sg[i])); 14957fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1496b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1497a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcoxstatic int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) 1498a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox{ 1499a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_dev *dev = ns->dev; 1500a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_queue *nvmeq; 1501a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_user_io io; 1502a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_command c; 1503f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch unsigned length, meta_len; 1504f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int status, i; 1505f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch struct nvme_iod *iod, *meta_iod = NULL; 1506f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch dma_addr_t meta_dma_addr; 1507f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch void *meta, *uninitialized_var(meta_mem); 1508a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1509a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox if (copy_from_user(&io, uio, sizeof(io))) 1510a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return -EFAULT; 15116c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox length = (io.nblocks + 1) << ns->lba_shift; 1512f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_len = (io.nblocks + 1) * ns->ms; 1513f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1514f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len && ((io.metadata & 3) || !io.metadata)) 1515f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch return -EINVAL; 15166c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 15176c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox switch (io.opcode) { 15186c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_write: 15196c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_read: 15206bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case nvme_cmd_compare: 1521eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_map_user_pages(dev, io.opcode & 1, io.addr, length); 15226413214c5d424fd5aae6567848340f962ad2ce0fMatthew Wilcox break; 15236c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox default: 15246bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EINVAL; 15256c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox } 15266c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 1527eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1528eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1529a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1530a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox memset(&c, 0, sizeof(c)); 1531a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.opcode = io.opcode; 1532a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.flags = io.flags; 15336c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.nsid = cpu_to_le32(ns->ns_id); 1534a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.slba = cpu_to_le64(io.slba); 15356c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.length = cpu_to_le16(io.nblocks); 1536a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.control = cpu_to_le16(io.control); 15371c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); 15381c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.reftag = cpu_to_le32(io.reftag); 15391c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.apptag = cpu_to_le16(io.apptag); 15401c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.appmask = cpu_to_le16(io.appmask); 1541f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1542f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len) { 15431b56749e541ad59068582f2a28297843e243b856Keith Busch meta_iod = nvme_map_user_pages(dev, io.opcode & 1, io.metadata, 15441b56749e541ad59068582f2a28297843e243b856Keith Busch meta_len); 1545f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (IS_ERR(meta_iod)) { 1546f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch status = PTR_ERR(meta_iod); 1547f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod = NULL; 1548f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch goto unmap; 1549f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1550f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1551f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_mem = dma_alloc_coherent(&dev->pci_dev->dev, meta_len, 1552f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch &meta_dma_addr, GFP_KERNEL); 1553f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (!meta_mem) { 1554f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch status = -ENOMEM; 1555f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch goto unmap; 1556f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1557f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1558f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (io.opcode & 1) { 1559f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int meta_offset = 0; 1560f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1561f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch for (i = 0; i < meta_iod->nents; i++) { 1562f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + 1563f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].offset; 1564f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch memcpy(meta_mem + meta_offset, meta, 1565f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].length); 1566f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch kunmap_atomic(meta); 1567f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_offset += meta_iod->sg[i].length; 1568f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1569f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1570f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1571f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch c.rw.metadata = cpu_to_le64(meta_dma_addr); 1572f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1573f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1574eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, GFP_KERNEL); 1575a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1576040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox nvmeq = get_nvmeq(dev); 1577fa92282149842645931580225647238428374758Matthew Wilcox /* 1578fa92282149842645931580225647238428374758Matthew Wilcox * Since nvme_submit_sync_cmd sleeps, we can't keep preemption 1579b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * disabled. We may be preempted at any point, and be rescheduled 1580b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * to a different CPU. That will cause cacheline bouncing, but no 1581b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * additional races since q_lock already protects against other CPUs. 1582b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox */ 1583a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox put_nvmeq(nvmeq); 1584b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (length != (io.nblocks + 1) << ns->lba_shift) 1585b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1586224042742582c9938788b81165180c876e997a07Keith Busch else if (!nvmeq || nvmeq->q_suspended) 1587224042742582c9938788b81165180c876e997a07Keith Busch status = -EBUSY; 1588b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1589ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox status = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT); 1590a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1591f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len) { 1592f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (status == NVME_SC_SUCCESS && !(io.opcode & 1)) { 1593f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int meta_offset = 0; 1594f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1595f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch for (i = 0; i < meta_iod->nents; i++) { 1596f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + 1597f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].offset; 1598f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch memcpy(meta, meta_mem + meta_offset, 1599f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].length); 1600f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch kunmap_atomic(meta); 1601f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_offset += meta_iod->sg[i].length; 1602f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1603f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1604f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1605f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch dma_free_coherent(&dev->pci_dev->dev, meta_len, meta_mem, 1606f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_dma_addr); 1607f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1608f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1609f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch unmap: 16101c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, io.opcode & 1, iod); 1611eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 1612f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1613f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_iod) { 1614f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch nvme_unmap_user_pages(dev, io.opcode & 1, meta_iod); 1615f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch nvme_free_iod(dev, meta_iod); 1616f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1617f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1618a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return status; 1619a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox} 1620a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 162150af8baec46a99a9b81a4600c0374f83a5a590a9Keith Buschstatic int nvme_user_admin_cmd(struct nvme_dev *dev, 16226bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd __user *ucmd) 16236ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox{ 16246bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd cmd; 16256ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox struct nvme_command c; 1626eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status, length; 1627c7d36ab8fa04c213328119a9c0d66985fe204ee5Keith Busch struct nvme_iod *uninitialized_var(iod); 162894f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch unsigned timeout; 16296ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 16306bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (!capable(CAP_SYS_ADMIN)) 16316bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EACCES; 16326bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (copy_from_user(&cmd, ucmd, sizeof(cmd))) 16336ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return -EFAULT; 16346ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 16356ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox memset(&c, 0, sizeof(c)); 16366bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.opcode = cmd.opcode; 16376bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.flags = cmd.flags; 16386bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.nsid = cpu_to_le32(cmd.nsid); 16396bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); 16406bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); 16416bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); 16426bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); 16436bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); 16446bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); 16456bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); 16466bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); 16476bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 16486bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox length = cmd.data_len; 16496bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 1650497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox iod = nvme_map_user_pages(dev, cmd.opcode & 1, cmd.addr, 1651497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox length); 1652eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1653eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1654eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, 1655eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_KERNEL); 16566bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 16576bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 165894f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch timeout = cmd.timeout_ms ? msecs_to_jiffies(cmd.timeout_ms) : 165994f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch ADMIN_TIMEOUT; 16606bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (length != cmd.data_len) 1661b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1662b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 166394f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch status = nvme_submit_sync_cmd(dev->queues[0], &c, &cmd.result, 166494f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch timeout); 1665eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 16666bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 16671c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, cmd.opcode & 1, iod); 1668eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 16696bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 1670f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 1671cf90bc4830b858487fe4b9b9ecd0031e23ca3e83Chayan Biswas if ((status >= 0) && copy_to_user(&ucmd->result, &cmd.result, 1672f4f117f64baf8840d22266d518227b2a186d294bKeith Busch sizeof(cmd.result))) 1673f4f117f64baf8840d22266d518227b2a186d294bKeith Busch status = -EFAULT; 1674f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 16756ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return status; 16766ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox} 16776ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 1678b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 1679b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long arg) 1680b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1681b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = bdev->bd_disk->private_data; 1682b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1683b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox switch (cmd) { 16846bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ID: 1685c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox force_successful_syscall_return(); 16866bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return ns->ns_id; 16876bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ADMIN_CMD: 168850af8baec46a99a9b81a4600c0374f83a5a590a9Keith Busch return nvme_user_admin_cmd(ns->dev, (void __user *)arg); 1689a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox case NVME_IOCTL_SUBMIT_IO: 1690a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return nvme_submit_io(ns, (void __user *)arg); 16915d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_GET_VERSION_NUM: 16925d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_get_version_num((void __user *)arg); 16935d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_IO: 16945d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_io(ns, (void __user *)arg); 1695b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox default: 1696b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOTTY; 1697b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1698b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1699b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1700320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#ifdef CONFIG_COMPAT 1701320a382746e0ab1304476ea7e986a8d416ab99dbKeith Buschstatic int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, 1702320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch unsigned int cmd, unsigned long arg) 1703320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch{ 1704320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch struct nvme_ns *ns = bdev->bd_disk->private_data; 1705320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch 1706320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch switch (cmd) { 1707320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch case SG_IO: 1708320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch return nvme_sg_io32(ns, arg); 1709320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch } 1710320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch return nvme_ioctl(bdev, mode, cmd, arg); 1711320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch} 1712320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#else 1713320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#define nvme_compat_ioctl NULL 1714320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#endif 1715320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch 1716b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic const struct block_device_operations nvme_fops = { 1717b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .owner = THIS_MODULE, 1718b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .ioctl = nvme_ioctl, 1719320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch .compat_ioctl = nvme_compat_ioctl, 1720b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1721b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17221fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic void nvme_resubmit_bios(struct nvme_queue *nvmeq) 17231fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 17241fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (bio_list_peek(&nvmeq->sq_cong)) { 17251fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 17261fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data; 1727427e97080196548557b288517537ab7eb48c309fKeith Busch 1728427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 1729427e97080196548557b288517537ab7eb48c309fKeith Busch remove_wait_queue(&nvmeq->sq_full, 1730427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 17311fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_submit_bio_queue(nvmeq, ns, bio)) { 1732427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 1733427e97080196548557b288517537ab7eb48c309fKeith Busch add_wait_queue(&nvmeq->sq_full, 1734427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 17351fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox bio_list_add_head(&nvmeq->sq_cong, bio); 17361fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox break; 17371fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 17381fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 17391fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 17401fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 17411fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic int nvme_kthread(void *data) 17421fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 1743d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch struct nvme_dev *dev, *next; 17441fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 17451fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (!kthread_should_stop()) { 1746564a232c059913d91b491e04c2b2d670b8f94615Arjan van de Ven set_current_state(TASK_INTERRUPTIBLE); 17471fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 1748d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch list_for_each_entry_safe(dev, next, &dev_list, node) { 17491fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox int i; 1750d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch if (readl(&dev->bar->csts) & NVME_CSTS_CFS && 1751d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized) { 1752d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch if (work_busy(&dev->reset_work)) 1753d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch continue; 1754d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch list_del_init(&dev->node); 1755d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev_warn(&dev->pci_dev->dev, 1756d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch "Failed status, reset controller\n"); 1757d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch INIT_WORK(&dev->reset_work, 1758d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch nvme_reset_failed_dev); 1759d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch queue_work(nvme_workq, &dev->reset_work); 1760d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch continue; 1761d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch } 17621fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox for (i = 0; i < dev->queue_count; i++) { 17631fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_queue *nvmeq = dev->queues[i]; 1764740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (!nvmeq) 1765740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox continue; 17661fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1767224042742582c9938788b81165180c876e997a07Keith Busch if (nvmeq->q_suspended) 1768224042742582c9938788b81165180c876e997a07Keith Busch goto unlock; 1769bc57a0f7a44cfcf3e9873f6c6b8dcecdca486b1fMatthew Wilcox nvme_process_cq(nvmeq); 1770a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_cancel_ios(nvmeq, true); 17711fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_resubmit_bios(nvmeq); 1772224042742582c9938788b81165180c876e997a07Keith Busch unlock: 17731fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 17741fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 17751fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 17761fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 1777acb7aa0db09b8abd38abeb84334a8a27a52fbb1bArjan van de Ven schedule_timeout(round_jiffies_relative(HZ)); 17781fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 17791fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 17801fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 17811fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 17820e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic void nvme_config_discard(struct nvme_ns *ns) 17830e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 17840e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch u32 logical_block_size = queue_logical_block_size(ns->queue); 17850e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_zeroes_data = 0; 17860e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_alignment = logical_block_size; 17870e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_granularity = logical_block_size; 17880e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.max_discard_sectors = 0xffffffff; 17890e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); 17900e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 17910e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 1792c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcoxstatic struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid, 1793b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_id_ns *id, struct nvme_lba_range_type *rt) 1794b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1795b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns; 1796b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct gendisk *disk; 1797b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int lbaf; 1798b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1799b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (rt->attributes & NVME_LBART_ATTRIB_HIDE) 1800b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1801b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1802b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns = kzalloc(sizeof(*ns), GFP_KERNEL); 1803b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns) 1804b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1805b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue = blk_alloc_queue(GFP_KERNEL); 1806b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns->queue) 1807b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_ns; 18084eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox ns->queue->queue_flags = QUEUE_FLAG_DEFAULT; 18094eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); 18104eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); 1811b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_queue_make_request(ns->queue, nvme_make_request); 1812b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->dev = dev; 1813b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue->queuedata = ns; 1814b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1815469071a37afc8a627b6b2ddf29db0a097d864845Matthew Wilcox disk = alloc_disk(0); 1816b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!disk) 1817b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_queue; 18185aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ns->ns_id = nsid; 1819b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->disk = disk; 1820b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox lbaf = id->flbas & 0xf; 1821b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->lba_shift = id->lbaf[lbaf].ds; 1822f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); 1823e9ef46369f5107e634a93b7fc4e62a1f53343197Keith Busch blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); 18248fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch if (dev->max_hw_sectors) 18258fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); 1826b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1827b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->major = nvme_major; 1828469071a37afc8a627b6b2ddf29db0a097d864845Matthew Wilcox disk->first_minor = 0; 1829b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->fops = &nvme_fops; 1830b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->private_data = ns; 1831b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->queue = ns->queue; 1832388f037f4e7f0a24bac6b1a24f144f5d939f58cfMatthew Wilcox disk->driverfs_dev = &dev->pci_dev->dev; 1833469071a37afc8a627b6b2ddf29db0a097d864845Matthew Wilcox disk->flags = GENHD_FL_EXT_DEVT; 18345aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); 1835b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); 1836b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18370e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (dev->oncs & NVME_CTRL_ONCS_DSM) 18380e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvme_config_discard(ns); 18390e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 1840b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return ns; 1841b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1842b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_queue: 1843b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1844b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_ns: 1845b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1846b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1847b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1848b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1849b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_ns_free(struct nvme_ns *ns) 1850b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1851b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_disk(ns->disk); 1852b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1853b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1854b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1855b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1856b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcoxstatic int set_queue_count(struct nvme_dev *dev, int count) 1857b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1858b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 1859b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 result; 1860b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcox u32 q_count = (count - 1) | ((count - 1) << 16); 1861b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1862df3481399042200792822b6243e36a95a557b57eMatthew Wilcox status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, 1863bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox &result); 1864b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 18657e03b124065507e72008ef294c30001eca74a031Keith Busch return status < 0 ? -EIO : -EBUSY; 1866b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return min(result & 0xffff, result >> 16) + 1; 1867b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1868b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18699d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Buschstatic size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) 18709d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch{ 1871b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu return 4096 + ((nr_io_queues + 1) * 8 * dev->db_stride); 18729d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch} 18739d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch 18748d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_setup_io_queues(struct nvme_dev *dev) 1875b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1876fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula struct pci_dev *pdev = dev->pci_dev; 18779d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch int result, cpu, i, vecs, nr_io_queues, size, q_depth; 1878b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1879b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = num_online_cpus(); 1880b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = set_queue_count(dev, nr_io_queues); 18811b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result < 0) 18821b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox return result; 1883b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox if (result < nr_io_queues) 1884b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 1885b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18869d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch size = db_bar_size(dev, nr_io_queues); 18879d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (size > 8192) { 1888f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox iounmap(dev->bar); 18899d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch do { 18909d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch dev->bar = ioremap(pci_resource_start(pdev, 0), size); 18919d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (dev->bar) 18929d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch break; 18939d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (!--nr_io_queues) 18949d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch return -ENOMEM; 18959d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch size = db_bar_size(dev, nr_io_queues); 18969d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch } while (1); 1897f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1898f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->queues[0]->q_db = dev->dbs; 1899f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox } 1900f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox 19019d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch /* Deregister the admin queue's interrupt */ 19029d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch free_irq(dev->entry[0].vector, dev->queues[0]); 19039d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch 1904063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = nr_io_queues; 1905063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox for (i = 0; i < vecs; i++) 19061b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->entry[i].entry = i; 19071b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox for (;;) { 1908063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox result = pci_enable_msix(pdev, dev->entry, vecs); 1909063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox if (result <= 0) 19101b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 1911063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = result; 19121b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 19131b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1914063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox if (result < 0) { 1915063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = nr_io_queues; 1916063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox if (vecs > 32) 1917063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = 32; 1918fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula for (;;) { 1919063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox result = pci_enable_msi_block(pdev, vecs); 1920fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula if (result == 0) { 1921063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox for (i = 0; i < vecs; i++) 1922fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula dev->entry[i].vector = i + pdev->irq; 1923fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula break; 1924063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox } else if (result < 0) { 1925063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = 1; 1926fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula break; 1927fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 1928063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = result; 1929fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 1930fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 1931fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula 1932063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox /* 1933063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * Should investigate if there's a performance win from allocating 1934063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * more queues than interrupt vectors; it might allow the submission 1935063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * path to scale better, even if the receive path is limited by the 1936063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * number of interrupts. 1937063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox */ 1938063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox nr_io_queues = vecs; 1939063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox 19401b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox result = queue_request_irq(dev, dev->queues[0], "nvme admin"); 19419d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (result) { 19429d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch dev->queues[0]->q_suspended = 1; 1943224042742582c9938788b81165180c876e997a07Keith Busch goto free_queues; 19449d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch } 19451b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1946cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch /* Free previously allocated queues that are no longer usable */ 1947cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch spin_lock(&dev_list_lock); 1948cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch for (i = dev->queue_count - 1; i > nr_io_queues; i--) { 1949cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct nvme_queue *nvmeq = dev->queues[i]; 1950cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 19510a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1952cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvme_cancel_ios(nvmeq, false); 19530a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1954cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 1955cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvme_free_queue(nvmeq); 1956cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch dev->queue_count--; 1957cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch dev->queues[i] = NULL; 1958cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch } 1959cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch spin_unlock(&dev_list_lock); 1960cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 19611b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_first(cpu_online_mask); 1962b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 19631b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox irq_set_affinity_hint(dev->entry[i].vector, get_cpu_mask(cpu)); 19641b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_next(cpu, cpu_online_mask); 19651b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 19661b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1967a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch q_depth = min_t(int, NVME_CAP_MQES(readq(&dev->bar->cap)) + 1, 1968a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch NVME_Q_DEPTH); 1969cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch for (i = dev->queue_count - 1; i < nr_io_queues; i++) { 1970224042742582c9938788b81165180c876e997a07Keith Busch dev->queues[i + 1] = nvme_alloc_queue(dev, i + 1, q_depth, i); 1971224042742582c9938788b81165180c876e997a07Keith Busch if (!dev->queues[i + 1]) { 1972224042742582c9938788b81165180c876e997a07Keith Busch result = -ENOMEM; 1973224042742582c9938788b81165180c876e997a07Keith Busch goto free_queues; 1974224042742582c9938788b81165180c876e997a07Keith Busch } 19751b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 1976b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19779ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox for (; i < num_possible_cpus(); i++) { 19789ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox int target = i % rounddown_pow_of_two(dev->queue_count - 1); 19799ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox dev->queues[i + 1] = dev->queues[target + 1]; 19809ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox } 19819ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox 1982224042742582c9938788b81165180c876e997a07Keith Busch for (i = 1; i < dev->queue_count; i++) { 1983224042742582c9938788b81165180c876e997a07Keith Busch result = nvme_create_queue(dev->queues[i], i); 1984224042742582c9938788b81165180c876e997a07Keith Busch if (result) { 1985224042742582c9938788b81165180c876e997a07Keith Busch for (--i; i > 0; i--) 1986224042742582c9938788b81165180c876e997a07Keith Busch nvme_disable_queue(dev, i); 1987224042742582c9938788b81165180c876e997a07Keith Busch goto free_queues; 1988224042742582c9938788b81165180c876e997a07Keith Busch } 1989224042742582c9938788b81165180c876e997a07Keith Busch } 1990b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1991224042742582c9938788b81165180c876e997a07Keith Busch return 0; 1992b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1993224042742582c9938788b81165180c876e997a07Keith Busch free_queues: 1994a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_free_queues(dev, 1); 1995224042742582c9938788b81165180c876e997a07Keith Busch return result; 1996b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1997b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1998422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox/* 1999422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Return: error value if an error occurred setting up the queues or calling 2000422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Identify Device. 0 if these succeeded, even if adding some of the 2001422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * namespaces failed. At the moment, these failures are silent. TBD which 2002422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * failures should be reported. 2003422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox */ 20048d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_dev_add(struct nvme_dev *dev) 2005b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 200668608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox struct pci_dev *pdev = dev->pci_dev; 2007c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox int res; 2008c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox unsigned nn, i; 2009cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch struct nvme_ns *ns; 201051814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox struct nvme_id_ctrl *ctrl; 2011bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_id_ns *id_ns; 2012bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox void *mem; 2013b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t dma_addr; 2014159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12; 2015b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 201668608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox mem = dma_alloc_coherent(&pdev->dev, 8192, &dma_addr, GFP_KERNEL); 2017a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch if (!mem) 2018a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch return -ENOMEM; 2019b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2020bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, 0, 1, dma_addr); 2021b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) { 2022b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = -EIO; 2023cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch goto out; 2024b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 2025b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2026bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ctrl = mem; 202751814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox nn = le32_to_cpup(&ctrl->nn); 20280e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch dev->oncs = le16_to_cpup(&ctrl->oncs); 2029c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev->abort_limit = ctrl->acl + 1; 203051814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); 203151814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); 203251814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); 2033159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (ctrl->mdts) 20348fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); 203568608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox if ((pdev->vendor == PCI_VENDOR_ID_INTEL) && 203668608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox (pdev->device == 0x0953) && ctrl->vs[3]) 2037159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch dev->stripe_size = 1 << (ctrl->vs[3] + shift); 2038b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2039bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox id_ns = mem; 20402b2c1896871838cdf549442e8ad0264be5fa74e3Matthew Wilcox for (i = 1; i <= nn; i++) { 2041bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, i, 0, dma_addr); 2042b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 2043b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 2044b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2045bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox if (id_ns->ncap == 0) 2046b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 2047b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2048bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_get_features(dev, NVME_FEAT_LBA_RANGE, i, 204908df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr + 4096, NULL); 2050b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 2051122090366d1d5c6ec1bfb6dfdb3a6d121ff074aaKeith Busch memset(mem + 4096, 0, 4096); 2052b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2053bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ns = nvme_alloc_ns(dev, i, mem, mem + 4096); 2054b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (ns) 2055b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_add_tail(&ns->list, &dev->namespaces); 2056b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 2057b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry(ns, &dev->namespaces, list) 2058b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox add_disk(ns->disk); 2059422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox res = 0; 2060b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2061bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox out: 2062684f5c2025b067a23722e620d0b3b858d8dc5d01Matthew Wilcox dma_free_coherent(&dev->pci_dev->dev, 8192, mem, dma_addr); 2063b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 2064b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2065b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 20660877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Buschstatic int nvme_dev_map(struct nvme_dev *dev) 20670877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch{ 20680877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch int bars, result = -ENOMEM; 20690877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch struct pci_dev *pdev = dev->pci_dev; 20700877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20710877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (pci_enable_device_mem(pdev)) 20720877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch return result; 20730877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20740877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->entry[0].vector = pdev->irq; 20750877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_set_master(pdev); 20760877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch bars = pci_select_bars(pdev, IORESOURCE_MEM); 20770877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (pci_request_selected_regions(pdev, bars, "nvme")) 20780877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto disable_pci; 20790877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 2080052d0efada8ccfccd924059b75f5fb119cd10f9aRussell King if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) && 2081052d0efada8ccfccd924059b75f5fb119cd10f9aRussell King dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) 2082052d0efada8ccfccd924059b75f5fb119cd10f9aRussell King goto disable; 20830877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20840877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 20850877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (!dev->bar) 20860877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto disable; 20870e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch if (readl(&dev->bar->csts) == -1) { 20880e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch result = -ENODEV; 20890e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch goto unmap; 20900e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch } 2091b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu dev->db_stride = 1 << NVME_CAP_STRIDE(readq(&dev->bar->cap)); 20920877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->dbs = ((void __iomem *)dev->bar) + 4096; 20930877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20940877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch return 0; 20950877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20960e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch unmap: 20970e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch iounmap(dev->bar); 20980e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch dev->bar = NULL; 20990877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch disable: 21000877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_release_regions(pdev); 21010877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch disable_pci: 21020877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_device(pdev); 21030877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch return result; 21040877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch} 21050877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 21060877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Buschstatic void nvme_dev_unmap(struct nvme_dev *dev) 21070877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch{ 21080877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (dev->pci_dev->msi_enabled) 21090877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_msi(dev->pci_dev); 21100877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch else if (dev->pci_dev->msix_enabled) 21110877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_msix(dev->pci_dev); 21120877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 21130877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (dev->bar) { 21140877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch iounmap(dev->bar); 21150877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->bar = NULL; 21169a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_release_regions(dev->pci_dev); 21170877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch } 21180877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 21190877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (pci_is_enabled(dev->pci_dev)) 21200877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_device(dev->pci_dev); 21210877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch} 21220877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 21234d115420707afcabe77d2535e092356df6664b70Keith Buschstruct nvme_delq_ctx { 21244d115420707afcabe77d2535e092356df6664b70Keith Busch struct task_struct *waiter; 21254d115420707afcabe77d2535e092356df6664b70Keith Busch struct kthread_worker *worker; 21264d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_t refcount; 21274d115420707afcabe77d2535e092356df6664b70Keith Busch}; 21284d115420707afcabe77d2535e092356df6664b70Keith Busch 21294d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_wait_dq(struct nvme_delq_ctx *dq, struct nvme_dev *dev) 21304d115420707afcabe77d2535e092356df6664b70Keith Busch{ 21314d115420707afcabe77d2535e092356df6664b70Keith Busch dq->waiter = current; 21324d115420707afcabe77d2535e092356df6664b70Keith Busch mb(); 21334d115420707afcabe77d2535e092356df6664b70Keith Busch 21344d115420707afcabe77d2535e092356df6664b70Keith Busch for (;;) { 21354d115420707afcabe77d2535e092356df6664b70Keith Busch set_current_state(TASK_KILLABLE); 21364d115420707afcabe77d2535e092356df6664b70Keith Busch if (!atomic_read(&dq->refcount)) 21374d115420707afcabe77d2535e092356df6664b70Keith Busch break; 21384d115420707afcabe77d2535e092356df6664b70Keith Busch if (!schedule_timeout(ADMIN_TIMEOUT) || 21394d115420707afcabe77d2535e092356df6664b70Keith Busch fatal_signal_pending(current)) { 21404d115420707afcabe77d2535e092356df6664b70Keith Busch set_current_state(TASK_RUNNING); 21414d115420707afcabe77d2535e092356df6664b70Keith Busch 21424d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_ctrl(dev, readq(&dev->bar->cap)); 21434d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_queue(dev, 0); 21444d115420707afcabe77d2535e092356df6664b70Keith Busch 21454d115420707afcabe77d2535e092356df6664b70Keith Busch send_sig(SIGKILL, dq->worker->task, 1); 21464d115420707afcabe77d2535e092356df6664b70Keith Busch flush_kthread_worker(dq->worker); 21474d115420707afcabe77d2535e092356df6664b70Keith Busch return; 21484d115420707afcabe77d2535e092356df6664b70Keith Busch } 21494d115420707afcabe77d2535e092356df6664b70Keith Busch } 21504d115420707afcabe77d2535e092356df6664b70Keith Busch set_current_state(TASK_RUNNING); 21514d115420707afcabe77d2535e092356df6664b70Keith Busch} 21524d115420707afcabe77d2535e092356df6664b70Keith Busch 21534d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_put_dq(struct nvme_delq_ctx *dq) 21544d115420707afcabe77d2535e092356df6664b70Keith Busch{ 21554d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_dec(&dq->refcount); 21564d115420707afcabe77d2535e092356df6664b70Keith Busch if (dq->waiter) 21574d115420707afcabe77d2535e092356df6664b70Keith Busch wake_up_process(dq->waiter); 21584d115420707afcabe77d2535e092356df6664b70Keith Busch} 21594d115420707afcabe77d2535e092356df6664b70Keith Busch 21604d115420707afcabe77d2535e092356df6664b70Keith Buschstatic struct nvme_delq_ctx *nvme_get_dq(struct nvme_delq_ctx *dq) 21614d115420707afcabe77d2535e092356df6664b70Keith Busch{ 21624d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_inc(&dq->refcount); 21634d115420707afcabe77d2535e092356df6664b70Keith Busch return dq; 21644d115420707afcabe77d2535e092356df6664b70Keith Busch} 21654d115420707afcabe77d2535e092356df6664b70Keith Busch 21664d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_queue_end(struct nvme_queue *nvmeq) 21674d115420707afcabe77d2535e092356df6664b70Keith Busch{ 21684d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_delq_ctx *dq = nvmeq->cmdinfo.ctx; 21694d115420707afcabe77d2535e092356df6664b70Keith Busch 21704d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_clear_queue(nvmeq); 21714d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_put_dq(dq); 21724d115420707afcabe77d2535e092356df6664b70Keith Busch} 21734d115420707afcabe77d2535e092356df6664b70Keith Busch 21744d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int adapter_async_del_queue(struct nvme_queue *nvmeq, u8 opcode, 21754d115420707afcabe77d2535e092356df6664b70Keith Busch kthread_work_func_t fn) 21764d115420707afcabe77d2535e092356df6664b70Keith Busch{ 21774d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_command c; 21784d115420707afcabe77d2535e092356df6664b70Keith Busch 21794d115420707afcabe77d2535e092356df6664b70Keith Busch memset(&c, 0, sizeof(c)); 21804d115420707afcabe77d2535e092356df6664b70Keith Busch c.delete_queue.opcode = opcode; 21814d115420707afcabe77d2535e092356df6664b70Keith Busch c.delete_queue.qid = cpu_to_le16(nvmeq->qid); 21824d115420707afcabe77d2535e092356df6664b70Keith Busch 21834d115420707afcabe77d2535e092356df6664b70Keith Busch init_kthread_work(&nvmeq->cmdinfo.work, fn); 21844d115420707afcabe77d2535e092356df6664b70Keith Busch return nvme_submit_admin_cmd_async(nvmeq->dev, &c, &nvmeq->cmdinfo); 21854d115420707afcabe77d2535e092356df6664b70Keith Busch} 21864d115420707afcabe77d2535e092356df6664b70Keith Busch 21874d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_cq_work_handler(struct kthread_work *work) 21884d115420707afcabe77d2535e092356df6664b70Keith Busch{ 21894d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 21904d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo.work); 21914d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_queue_end(nvmeq); 21924d115420707afcabe77d2535e092356df6664b70Keith Busch} 21934d115420707afcabe77d2535e092356df6664b70Keith Busch 21944d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_delete_cq(struct nvme_queue *nvmeq) 21954d115420707afcabe77d2535e092356df6664b70Keith Busch{ 21964d115420707afcabe77d2535e092356df6664b70Keith Busch return adapter_async_del_queue(nvmeq, nvme_admin_delete_cq, 21974d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_cq_work_handler); 21984d115420707afcabe77d2535e092356df6664b70Keith Busch} 21994d115420707afcabe77d2535e092356df6664b70Keith Busch 22004d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_sq_work_handler(struct kthread_work *work) 22014d115420707afcabe77d2535e092356df6664b70Keith Busch{ 22024d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 22034d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo.work); 22044d115420707afcabe77d2535e092356df6664b70Keith Busch int status = nvmeq->cmdinfo.status; 22054d115420707afcabe77d2535e092356df6664b70Keith Busch 22064d115420707afcabe77d2535e092356df6664b70Keith Busch if (!status) 22074d115420707afcabe77d2535e092356df6664b70Keith Busch status = nvme_delete_cq(nvmeq); 22084d115420707afcabe77d2535e092356df6664b70Keith Busch if (status) 22094d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_queue_end(nvmeq); 22104d115420707afcabe77d2535e092356df6664b70Keith Busch} 22114d115420707afcabe77d2535e092356df6664b70Keith Busch 22124d115420707afcabe77d2535e092356df6664b70Keith Buschstatic int nvme_delete_sq(struct nvme_queue *nvmeq) 22134d115420707afcabe77d2535e092356df6664b70Keith Busch{ 22144d115420707afcabe77d2535e092356df6664b70Keith Busch return adapter_async_del_queue(nvmeq, nvme_admin_delete_sq, 22154d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_sq_work_handler); 22164d115420707afcabe77d2535e092356df6664b70Keith Busch} 22174d115420707afcabe77d2535e092356df6664b70Keith Busch 22184d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_del_queue_start(struct kthread_work *work) 22194d115420707afcabe77d2535e092356df6664b70Keith Busch{ 22204d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 22214d115420707afcabe77d2535e092356df6664b70Keith Busch cmdinfo.work); 22224d115420707afcabe77d2535e092356df6664b70Keith Busch allow_signal(SIGKILL); 22234d115420707afcabe77d2535e092356df6664b70Keith Busch if (nvme_delete_sq(nvmeq)) 22244d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_del_queue_end(nvmeq); 22254d115420707afcabe77d2535e092356df6664b70Keith Busch} 22264d115420707afcabe77d2535e092356df6664b70Keith Busch 22274d115420707afcabe77d2535e092356df6664b70Keith Buschstatic void nvme_disable_io_queues(struct nvme_dev *dev) 22284d115420707afcabe77d2535e092356df6664b70Keith Busch{ 22294d115420707afcabe77d2535e092356df6664b70Keith Busch int i; 22304d115420707afcabe77d2535e092356df6664b70Keith Busch DEFINE_KTHREAD_WORKER_ONSTACK(worker); 22314d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_delq_ctx dq; 22324d115420707afcabe77d2535e092356df6664b70Keith Busch struct task_struct *kworker_task = kthread_run(kthread_worker_fn, 22334d115420707afcabe77d2535e092356df6664b70Keith Busch &worker, "nvme%d", dev->instance); 22344d115420707afcabe77d2535e092356df6664b70Keith Busch 22354d115420707afcabe77d2535e092356df6664b70Keith Busch if (IS_ERR(kworker_task)) { 22364d115420707afcabe77d2535e092356df6664b70Keith Busch dev_err(&dev->pci_dev->dev, 22374d115420707afcabe77d2535e092356df6664b70Keith Busch "Failed to create queue del task\n"); 22384d115420707afcabe77d2535e092356df6664b70Keith Busch for (i = dev->queue_count - 1; i > 0; i--) 22394d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_queue(dev, i); 22404d115420707afcabe77d2535e092356df6664b70Keith Busch return; 22414d115420707afcabe77d2535e092356df6664b70Keith Busch } 22424d115420707afcabe77d2535e092356df6664b70Keith Busch 22434d115420707afcabe77d2535e092356df6664b70Keith Busch dq.waiter = NULL; 22444d115420707afcabe77d2535e092356df6664b70Keith Busch atomic_set(&dq.refcount, 0); 22454d115420707afcabe77d2535e092356df6664b70Keith Busch dq.worker = &worker; 22464d115420707afcabe77d2535e092356df6664b70Keith Busch for (i = dev->queue_count - 1; i > 0; i--) { 22474d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = dev->queues[i]; 22484d115420707afcabe77d2535e092356df6664b70Keith Busch 22494d115420707afcabe77d2535e092356df6664b70Keith Busch if (nvme_suspend_queue(nvmeq)) 22504d115420707afcabe77d2535e092356df6664b70Keith Busch continue; 22514d115420707afcabe77d2535e092356df6664b70Keith Busch nvmeq->cmdinfo.ctx = nvme_get_dq(&dq); 22524d115420707afcabe77d2535e092356df6664b70Keith Busch nvmeq->cmdinfo.worker = dq.worker; 22534d115420707afcabe77d2535e092356df6664b70Keith Busch init_kthread_work(&nvmeq->cmdinfo.work, nvme_del_queue_start); 22544d115420707afcabe77d2535e092356df6664b70Keith Busch queue_kthread_work(dq.worker, &nvmeq->cmdinfo.work); 22554d115420707afcabe77d2535e092356df6664b70Keith Busch } 22564d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_wait_dq(&dq, dev); 22574d115420707afcabe77d2535e092356df6664b70Keith Busch kthread_stop(kworker_task); 22584d115420707afcabe77d2535e092356df6664b70Keith Busch} 22594d115420707afcabe77d2535e092356df6664b70Keith Busch 2260f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Buschstatic void nvme_dev_shutdown(struct nvme_dev *dev) 2261b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2262224042742582c9938788b81165180c876e997a07Keith Busch int i; 2263224042742582c9938788b81165180c876e997a07Keith Busch 2264d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized = 0; 2265b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 22661fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 2267f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch list_del_init(&dev->node); 22681fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 22691fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 22704d115420707afcabe77d2535e092356df6664b70Keith Busch if (!dev->bar || (dev->bar && readl(&dev->bar->csts) == -1)) { 22714d115420707afcabe77d2535e092356df6664b70Keith Busch for (i = dev->queue_count - 1; i >= 0; i--) { 22724d115420707afcabe77d2535e092356df6664b70Keith Busch struct nvme_queue *nvmeq = dev->queues[i]; 22734d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_suspend_queue(nvmeq); 22744d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_clear_queue(nvmeq); 22754d115420707afcabe77d2535e092356df6664b70Keith Busch } 22764d115420707afcabe77d2535e092356df6664b70Keith Busch } else { 22774d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_io_queues(dev); 22781894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch nvme_shutdown_ctrl(dev); 22794d115420707afcabe77d2535e092356df6664b70Keith Busch nvme_disable_queue(dev, 0); 22804d115420707afcabe77d2535e092356df6664b70Keith Busch } 2281f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_dev_unmap(dev); 2282f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch} 2283f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2284f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Buschstatic void nvme_dev_remove(struct nvme_dev *dev) 2285f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch{ 2286f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch struct nvme_ns *ns, *next; 2287f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2288b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 2289b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_del(&ns->list); 2290b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox del_gendisk(ns->disk); 2291b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_ns_free(ns); 2292b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 2293b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2294b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2295091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic int nvme_setup_prp_pools(struct nvme_dev *dev) 2296091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 2297091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 2298091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dev->prp_page_pool = dma_pool_create("prp list page", dmadev, 2299091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox PAGE_SIZE, PAGE_SIZE, 0); 2300091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (!dev->prp_page_pool) 2301091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return -ENOMEM; 2302091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 230399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox /* Optimisation for I/Os between 4k and 128k */ 230499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dev->prp_small_pool = dma_pool_create("prp list 256", dmadev, 230599802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 256, 256, 0); 230699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (!dev->prp_small_pool) { 230799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 230899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox return -ENOMEM; 230999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 2310091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return 0; 2311091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 2312091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2313091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic void nvme_release_prp_pools(struct nvme_dev *dev) 2314091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 2315091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 231699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_small_pool); 2317091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 2318091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2319cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic DEFINE_IDA(nvme_instance_ida); 2320cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2321cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic int nvme_set_instance(struct nvme_dev *dev) 2322b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2323cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh int instance, error; 2324cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2325cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh do { 2326cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) 2327cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 2328cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2329cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 2330cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh error = ida_get_new(&nvme_instance_ida, &instance); 2331cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 2332cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh } while (error == -EAGAIN); 2333cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2334cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (error) 2335cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 2336cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2337cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh dev->instance = instance; 2338cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return 0; 2339b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2340b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2341b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_release_instance(struct nvme_dev *dev) 2342b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2343cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 2344cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh ida_remove(&nvme_instance_ida, dev->instance); 2345cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 2346b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2347b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 23485e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic void nvme_free_dev(struct kref *kref) 23495e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 23505e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref); 23515e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->queues); 23525e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->entry); 23535e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev); 23545e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 23555e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 23565e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_open(struct inode *inode, struct file *f) 23575e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 23585e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(f->private_data, struct nvme_dev, 23595e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch miscdev); 23605e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_get(&dev->kref); 23615e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch f->private_data = dev; 23625e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 23635e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 23645e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 23655e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_release(struct inode *inode, struct file *f) 23665e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 23675e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 23685e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 23695e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 23705e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 23715e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 23725e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg) 23735e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 23745e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 23755e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch switch (cmd) { 23765e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch case NVME_IOCTL_ADMIN_CMD: 23775e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return nvme_user_admin_cmd(dev, (void __user *)arg); 23785e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch default: 23795e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return -ENOTTY; 23805e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch } 23815e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 23825e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 23835e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic const struct file_operations nvme_dev_fops = { 23845e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .owner = THIS_MODULE, 23855e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .open = nvme_dev_open, 23865e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .release = nvme_dev_release, 23875e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .unlocked_ioctl = nvme_dev_ioctl, 23885e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .compat_ioctl = nvme_dev_ioctl, 23895e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch}; 23905e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 2391f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Buschstatic int nvme_dev_start(struct nvme_dev *dev) 2392f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch{ 2393f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch int result; 2394f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2395f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_dev_map(dev); 2396f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch if (result) 2397f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch return result; 2398f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2399f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_configure_admin_queue(dev); 2400f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch if (result) 2401f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch goto unmap; 2402f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2403f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_lock(&dev_list_lock); 2404f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch list_add(&dev->node, &dev_list); 2405f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_unlock(&dev_list_lock); 2406f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2407f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_setup_io_queues(dev); 2408d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result && result != -EBUSY) 2409f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch goto disable; 2410f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2411d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch return result; 2412f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2413f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch disable: 2414a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_disable_queue(dev, 0); 2415f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_lock(&dev_list_lock); 2416f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch list_del_init(&dev->node); 2417f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_unlock(&dev_list_lock); 2418f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch unmap: 2419f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_dev_unmap(dev); 2420f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch return result; 2421f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch} 2422f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 24239a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic int nvme_remove_dead_ctrl(void *arg) 24249a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 24259a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct nvme_dev *dev = (struct nvme_dev *)arg; 24269a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct pci_dev *pdev = dev->pci_dev; 24279a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 24289a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (pci_get_drvdata(pdev)) 24299a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_stop_and_remove_bus_device(pdev); 24309a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kref_put(&dev->kref, nvme_free_dev); 24319a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return 0; 24329a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 24339a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 24349a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic void nvme_remove_disks(struct work_struct *ws) 24359a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 24369a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch int i; 24379a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); 24389a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 24399a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_remove(dev); 24409a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_lock(&dev_list_lock); 24419a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch for (i = dev->queue_count - 1; i > 0; i--) { 24429a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch BUG_ON(!dev->queues[i] || !dev->queues[i]->q_suspended); 24439a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_free_queue(dev->queues[i]); 24449a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev->queue_count--; 24459a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev->queues[i] = NULL; 24469a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 24479a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_unlock(&dev_list_lock); 24489a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 24499a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 24509a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic int nvme_dev_resume(struct nvme_dev *dev) 24519a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 24529a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch int ret; 24539a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 24549a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch ret = nvme_dev_start(dev); 24559a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (ret && ret != -EBUSY) 24569a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return ret; 24579a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (ret == -EBUSY) { 24589a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_lock(&dev_list_lock); 24599a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch INIT_WORK(&dev->reset_work, nvme_remove_disks); 24609a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch queue_work(nvme_workq, &dev->reset_work); 24619a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_unlock(&dev_list_lock); 24629a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 2463d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized = 1; 24649a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return 0; 24659a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 24669a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 24679a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic void nvme_dev_reset(struct nvme_dev *dev) 24689a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 24699a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_shutdown(dev); 24709a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (nvme_dev_resume(dev)) { 24719a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev_err(&dev->pci_dev->dev, "Device failed to resume\n"); 24729a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kref_get(&dev->kref); 24739a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (IS_ERR(kthread_run(nvme_remove_dead_ctrl, dev, "nvme%d", 24749a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev->instance))) { 24759a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev_err(&dev->pci_dev->dev, 24769a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch "Failed to start controller remove task\n"); 24779a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kref_put(&dev->kref, nvme_free_dev); 24789a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 24799a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 24809a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 24819a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 24829a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic void nvme_reset_failed_dev(struct work_struct *ws) 24839a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 24849a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); 24859a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_reset(dev); 24869a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 24879a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 24888d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) 2489b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 24900877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch int result = -ENOMEM; 2491b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev; 2492b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2493b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev = kzalloc(sizeof(*dev), GFP_KERNEL); 2494b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev) 2495b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOMEM; 2496b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->entry = kcalloc(num_possible_cpus(), sizeof(*dev->entry), 2497b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 2498b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->entry) 2499b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 25001b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queues = kcalloc(num_possible_cpus() + 1, sizeof(void *), 25011b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox GFP_KERNEL); 2502b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->queues) 2503b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 2504b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2505b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox INIT_LIST_HEAD(&dev->namespaces); 2506b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->pci_dev = pdev; 25079a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_set_drvdata(pdev, dev); 2508cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh result = nvme_set_instance(dev); 2509cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (result) 25100877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto free; 2511b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2512091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox result = nvme_setup_prp_pools(dev); 2513091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (result) 25140877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto release; 2515091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2516f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_dev_start(dev); 2517d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result) { 2518d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result == -EBUSY) 2519d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch goto create_cdev; 25200877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto release_pools; 2521d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch } 2522b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2523740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox result = nvme_dev_add(dev); 2524d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result) 2525f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch goto shutdown; 2526740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 2527d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch create_cdev: 25285e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch scnprintf(dev->name, sizeof(dev->name), "nvme%d", dev->instance); 25295e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.minor = MISC_DYNAMIC_MINOR; 25305e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.parent = &pdev->dev; 25315e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.name = dev->name; 25325e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.fops = &nvme_dev_fops; 25335e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch result = misc_register(&dev->miscdev); 25345e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch if (result) 25355e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch goto remove; 25365e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 2537d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized = 1; 25385e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_init(&dev->kref); 2539b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 2540b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 25415e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch remove: 25425e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_dev_remove(dev); 2543f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch shutdown: 2544f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_dev_shutdown(dev); 25450877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch release_pools: 2546a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_free_queues(dev, 0); 2547091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 25480877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch release: 25490877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch nvme_release_instance(dev); 2550b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free: 2551b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 2552b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 2553b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 2554b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 2555b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2556b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 25578d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic void nvme_remove(struct pci_dev *pdev) 2558b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2559b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev = pci_get_drvdata(pdev); 25609a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 25619a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_lock(&dev_list_lock); 25629a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch list_del_init(&dev->node); 25639a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_unlock(&dev_list_lock); 25649a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 25659a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_set_drvdata(pdev, NULL); 25669a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch flush_work(&dev->reset_work); 25675e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch misc_deregister(&dev->miscdev); 25689a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_remove(dev); 25699a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_shutdown(dev); 2570a1a5ef9998b1379780790b878457b0e0f48b25dbKeith Busch nvme_free_queues(dev, 0); 25719a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_release_instance(dev); 25729a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_release_prp_pools(dev); 25735e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 2574b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2575b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2576b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* These functions are yet to be implemented */ 2577b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_detected NULL 2578b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_dump_registers NULL 2579b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_link_reset NULL 2580b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_slot_reset NULL 2581b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_resume NULL 2582cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2583cd63894630ab17a192bf97427d16dbec10710a6aKeith Buschstatic int nvme_suspend(struct device *dev) 2584cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch{ 2585cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct pci_dev *pdev = to_pci_dev(dev); 2586cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct nvme_dev *ndev = pci_get_drvdata(pdev); 2587cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2588cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvme_dev_shutdown(ndev); 2589cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return 0; 2590cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch} 2591cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2592cd63894630ab17a192bf97427d16dbec10710a6aKeith Buschstatic int nvme_resume(struct device *dev) 2593cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch{ 2594cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct pci_dev *pdev = to_pci_dev(dev); 2595cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct nvme_dev *ndev = pci_get_drvdata(pdev); 2596cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 25979a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (nvme_dev_resume(ndev) && !work_busy(&ndev->reset_work)) { 25989a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch INIT_WORK(&ndev->reset_work, nvme_reset_failed_dev); 25999a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch queue_work(nvme_workq, &ndev->reset_work); 26009a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 26019a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return 0; 2602cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch} 2603cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2604cd63894630ab17a192bf97427d16dbec10710a6aKeith Buschstatic SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume); 2605b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 26061d3520357df99baf4ad89f86268ac96cd38092d9Stephen Hemmingerstatic const struct pci_error_handlers nvme_err_handler = { 2607b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .error_detected = nvme_error_detected, 2608b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .mmio_enabled = nvme_dump_registers, 2609b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .link_reset = nvme_link_reset, 2610b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .slot_reset = nvme_slot_reset, 2611b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_error_resume, 2612b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2613b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2614b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* Move to pci_ids.h later */ 2615b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define PCI_CLASS_STORAGE_EXPRESS 0x010802 2616b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2617b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic DEFINE_PCI_DEVICE_TABLE(nvme_id_table) = { 2618b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 2619b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { 0, } 2620b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2621b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_DEVICE_TABLE(pci, nvme_id_table); 2622b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2623b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct pci_driver nvme_driver = { 2624b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .name = "nvme", 2625b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .id_table = nvme_id_table, 2626b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .probe = nvme_probe, 26278d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartman .remove = nvme_remove, 2628cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch .driver = { 2629cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch .pm = &nvme_dev_pm_ops, 2630cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch }, 2631b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .err_handler = &nvme_err_handler, 2632b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2633b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2634b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __init nvme_init(void) 2635b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 26360ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox int result; 26371fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 26381fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 26391fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (IS_ERR(nvme_thread)) 26401fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return PTR_ERR(nvme_thread); 2641b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 26429a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch result = -ENOMEM; 26439a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_workq = create_singlethread_workqueue("nvme"); 26449a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (!nvme_workq) 26459a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch goto kill_kthread; 26469a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 26475c42ea1643a630060f9e71e06d3933d244970967Keith Busch result = register_blkdev(nvme_major, "nvme"); 26485c42ea1643a630060f9e71e06d3933d244970967Keith Busch if (result < 0) 26499a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch goto kill_workq; 26505c42ea1643a630060f9e71e06d3933d244970967Keith Busch else if (result > 0) 26510ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox nvme_major = result; 2652b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2653b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = pci_register_driver(&nvme_driver); 26541fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (result) 26551fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto unregister_blkdev; 26561fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 2657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 26581fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox unregister_blkdev: 2659b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 26609a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kill_workq: 26619a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch destroy_workqueue(nvme_workq); 26621fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kill_kthread: 26631fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 2664b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 2665b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2666b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2667b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __exit nvme_exit(void) 2668b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2669b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_unregister_driver(&nvme_driver); 2670b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 26719a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch destroy_workqueue(nvme_workq); 26721fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 2673b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2674b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2675b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 2676b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_LICENSE("GPL"); 2677366e8217e5ec6ce9f73aec19c46d983110fb4a98Matthew WilcoxMODULE_VERSION("0.8"); 2678b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_init(nvme_init); 2679b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_exit(nvme_exit); 2680