nvme-core.c revision 0e53d18051725da46cbccfb7874a6422d4d4f274
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)) 49b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define NVME_MINORS 64 50e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox#define ADMIN_TIMEOUT (60 * HZ) 51b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 52b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_major; 53b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_param(nvme_major, int, 0); 54b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic int use_threaded_interrupts; 5658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxmodule_param(use_threaded_interrupts, int, 0); 5758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 581fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic DEFINE_SPINLOCK(dev_list_lock); 591fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic LIST_HEAD(dev_list); 601fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic struct task_struct *nvme_thread; 619a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic struct workqueue_struct *nvme_workq; 621fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 63d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Buschstatic void nvme_reset_failed_dev(struct work_struct *ws); 64d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch 65b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 66b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * An NVM Express queue. Each device has at least two (one for admin 67b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * commands and one for I/O commands). 68b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 69b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstruct nvme_queue { 70b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *q_dmadev; 71091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct nvme_dev *dev; 72b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spinlock_t q_lock; 73b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command *sq_cmds; 74b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox volatile struct nvme_completion *cqes; 75b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t sq_dma_addr; 76b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t cq_dma_addr; 77b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_queue_head_t sq_full; 781fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox wait_queue_t sq_cong_wait; 79b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio_list sq_cong; 80b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 __iomem *q_db; 81b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 q_depth; 82b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_vector; 83b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_head; 84b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_tail; 85b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_head; 86c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch u16 qid; 87e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox u8 cq_phase; 88e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox u8 cqe_seen; 89224042742582c9938788b81165180c876e997a07Keith Busch u8 q_suspended; 90b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long cmdid_data[]; 91b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 92b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 93b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 94b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Check we didin't inadvertently grow the command struct 95b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 96b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic inline void _nvme_check_size(void) 97b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 98b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); 99b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); 100b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); 101b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); 102b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_features) != 64); 103f8ebf8409abfdaeeb8c847381629a2a8b8e3d816Vishal Verma BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); 104c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); 105b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_command) != 64); 106b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); 107b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); 108b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); 1096ecec74520d8a357726e6c12f99080dbe7b347ddKeith Busch BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); 110b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 111b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1125c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxtypedef void (*nvme_completion_fn)(struct nvme_dev *, void *, 113c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *); 114c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 115e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstruct nvme_cmd_info { 116c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 117c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 118e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox unsigned long timeout; 119c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch int aborted; 120e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox}; 121e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 122e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstatic struct nvme_cmd_info *nvme_cmd_info(struct nvme_queue *nvmeq) 123e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox{ 124e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return (void *)&nvmeq->cmdid_data[BITS_TO_LONGS(nvmeq->q_depth)]; 125e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox} 126e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 127224042742582c9938788b81165180c876e997a07Keith Buschstatic unsigned nvme_queue_extra(int depth) 128224042742582c9938788b81165180c876e997a07Keith Busch{ 129224042742582c9938788b81165180c876e997a07Keith Busch return DIV_ROUND_UP(depth, 8) + (depth * sizeof(struct nvme_cmd_info)); 130224042742582c9938788b81165180c876e997a07Keith Busch} 131224042742582c9938788b81165180c876e997a07Keith Busch 132b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 133714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * alloc_cmdid() - Allocate a Command ID 134714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @nvmeq: The queue that will be used for this command 135714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @ctx: A pointer that will be passed to the handler 136c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox * @handler: The function to call on completion 137b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 138b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Allocate a Command ID for a queue. The data passed in will 139b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * be passed to the completion handler. This is implemented by using 140b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the bottom two bits of the ctx pointer to store the handler ID. 141b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Passing in a pointer that's not 4-byte aligned will cause a BUG. 142b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * We can change this if it becomes a problem. 143184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * 144184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * May be called with local interrupts disabled and the q_lock held, 145184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * or with interrupts enabled and no locks held. 146b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 147c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic int alloc_cmdid(struct nvme_queue *nvmeq, void *ctx, 148c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 149b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 150e6d15f79f997a98b3a69abbc462fc9041cc1a7b4Matthew Wilcox int depth = nvmeq->q_depth - 1; 151e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 152b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 153b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 154b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox do { 155b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdid = find_first_zero_bit(nvmeq->cmdid_data, depth); 156b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid >= depth) 157b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EBUSY; 158b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } while (test_and_set_bit(cmdid, nvmeq->cmdid_data)); 159b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 160c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = handler; 161c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].ctx = ctx; 162e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].timeout = jiffies + timeout; 163c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch info[cmdid].aborted = 0; 164b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 165b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 166b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 167b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int alloc_cmdid_killable(struct nvme_queue *nvmeq, void *ctx, 168c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 169b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 170b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 171b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_event_killable(nvmeq->sq_full, 172e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox (cmdid = alloc_cmdid(nvmeq, ctx, handler, timeout)) >= 0); 173b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return (cmdid < 0) ? -EINTR : cmdid; 174b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 175b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 176c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox/* Special values must be less than 0x1000 */ 177c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox#define CMD_CTX_BASE ((void *)POISON_POINTER_DELTA) 178d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_CANCELLED (0x30C + CMD_CTX_BASE) 179d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_COMPLETED (0x310 + CMD_CTX_BASE) 180d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_INVALID (0x314 + CMD_CTX_BASE) 18100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox#define CMD_CTX_FLUSH (0x318 + CMD_CTX_BASE) 182c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch#define CMD_CTX_ABORT (0x31C + CMD_CTX_BASE) 183be7b62754e097adc0cb16c25c9ee86ee20de62fbMatthew Wilcox 1845c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void special_completion(struct nvme_dev *dev, void *ctx, 185c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 186c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 187c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_CANCELLED) 188c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 189c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_FLUSH) 190c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 191c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (ctx == CMD_CTX_ABORT) { 192c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch ++dev->abort_limit; 193c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 194c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch } 195c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_COMPLETED) { 1965c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 197c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "completed id %d twice on queue %d\n", 198c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 199c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 200c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 201c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_INVALID) { 2025c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 203c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "invalid id %d completed on queue %d\n", 204c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 205c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 206c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 207c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 2085c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, "Unknown special completion %p\n", ctx); 209c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 210c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 211184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 212184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 213184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 214c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *free_cmdid(struct nvme_queue *nvmeq, int cmdid, 215c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 216b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 217c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 218e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 219b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 220c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (cmdid >= nvmeq->q_depth) { 221c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = special_completion; 22248e3d39816416b3bf03dee3a796c0c04427c1a31Matthew Wilcox return CMD_CTX_INVALID; 223c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 224859361a228258edf4821d9f5635825033eca78e8Keith Busch if (fn) 225859361a228258edf4821d9f5635825033eca78e8Keith Busch *fn = info[cmdid].fn; 226c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 227c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 228e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_COMPLETED; 229b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox clear_bit(cmdid, nvmeq->cmdid_data); 230b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wake_up(&nvmeq->sq_full); 231c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 232b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 233b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 234c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *cancel_cmdid(struct nvme_queue *nvmeq, int cmdid, 235c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 2363c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 237c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 238e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 239c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (fn) 240c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = info[cmdid].fn; 241c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 242c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 243e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_CANCELLED; 244c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 2453c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 2463c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 2475d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermastruct nvme_queue *get_nvmeq(struct nvme_dev *dev) 248b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 249040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox return dev->queues[get_cpu() + 1]; 250b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 251b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2525d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid put_nvmeq(struct nvme_queue *nvmeq) 253b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2541b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox put_cpu(); 255b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 256b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 257b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 258714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * nvme_submit_cmd() - Copy a command into a queue and ring the doorbell 259b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @nvmeq: The queue to use 260b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @cmd: The command to send 261b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 262b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Safe to use from interrupt context 263b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 264b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) 265b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 266b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long flags; 267b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 tail; 268b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_irqsave(&nvmeq->q_lock, flags); 269b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = nvmeq->sq_tail; 270b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); 271b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++tail == nvmeq->q_depth) 272b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = 0; 2737547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(tail, nvmeq->q_db); 274b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = tail; 275b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_unlock_irqrestore(&nvmeq->q_lock, flags); 276b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 277b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 278b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 279b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 280eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic __le64 **iod_list(struct nvme_iod *iod) 281e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews{ 282eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ((void *)iod) + iod->offset; 283e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews} 284e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 285eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox/* 286eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * Will slightly overestimate the number of pages needed. This is OK 287eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * as it only leads to a small amount of wasted memory for the lifetime of 288eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * the I/O. 289eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox */ 290eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_npages(unsigned size) 291eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox{ 292eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned nprps = DIV_ROUND_UP(size + PAGE_SIZE, PAGE_SIZE); 293eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); 294eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox} 295b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 296eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic struct nvme_iod * 297eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxnvme_alloc_iod(unsigned nseg, unsigned nbytes, gfp_t gfp) 298b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 299eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + 300eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(__le64 *) * nvme_npages(nbytes) + 301eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(struct scatterlist) * nseg, gfp); 302eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 303eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod) { 304eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->offset = offsetof(struct nvme_iod, sg[nseg]); 305eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 306eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->length = nbytes; 3072b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch iod->nents = 0; 3086198221fa0df0298513b35796f63f242ea97134eKeith Busch iod->start_time = jiffies; 309eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 310eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 311eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 312b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 313b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3145d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) 315b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 316eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox const int last_prp = PAGE_SIZE / 8 - 1; 317eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int i; 318eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 319eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t prp_dma = iod->first_dma; 320eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 321eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod->npages == 0) 322eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_small_pool, list[0], prp_dma); 323eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox for (i = 0; i < iod->npages; i++) { 324eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 *prp_list = list[i]; 325eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); 326eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); 327eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox prp_dma = next_prp_dma; 328eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 329eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 330b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 331b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3326198221fa0df0298513b35796f63f242ea97134eKeith Buschstatic void nvme_start_io_acct(struct bio *bio) 3336198221fa0df0298513b35796f63f242ea97134eKeith Busch{ 3346198221fa0df0298513b35796f63f242ea97134eKeith Busch struct gendisk *disk = bio->bi_bdev->bd_disk; 3356198221fa0df0298513b35796f63f242ea97134eKeith Busch const int rw = bio_data_dir(bio); 3366198221fa0df0298513b35796f63f242ea97134eKeith Busch int cpu = part_stat_lock(); 3376198221fa0df0298513b35796f63f242ea97134eKeith Busch part_round_stats(cpu, &disk->part0); 3386198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_inc(cpu, &disk->part0, ios[rw]); 3396198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_add(cpu, &disk->part0, sectors[rw], bio_sectors(bio)); 3406198221fa0df0298513b35796f63f242ea97134eKeith Busch part_inc_in_flight(&disk->part0, rw); 3416198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_unlock(); 3426198221fa0df0298513b35796f63f242ea97134eKeith Busch} 3436198221fa0df0298513b35796f63f242ea97134eKeith Busch 3446198221fa0df0298513b35796f63f242ea97134eKeith Buschstatic void nvme_end_io_acct(struct bio *bio, unsigned long start_time) 3456198221fa0df0298513b35796f63f242ea97134eKeith Busch{ 3466198221fa0df0298513b35796f63f242ea97134eKeith Busch struct gendisk *disk = bio->bi_bdev->bd_disk; 3476198221fa0df0298513b35796f63f242ea97134eKeith Busch const int rw = bio_data_dir(bio); 3486198221fa0df0298513b35796f63f242ea97134eKeith Busch unsigned long duration = jiffies - start_time; 3496198221fa0df0298513b35796f63f242ea97134eKeith Busch int cpu = part_stat_lock(); 3506198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_add(cpu, &disk->part0, ticks[rw], duration); 3516198221fa0df0298513b35796f63f242ea97134eKeith Busch part_round_stats(cpu, &disk->part0); 3526198221fa0df0298513b35796f63f242ea97134eKeith Busch part_dec_in_flight(&disk->part0, rw); 3536198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_unlock(); 3546198221fa0df0298513b35796f63f242ea97134eKeith Busch} 3556198221fa0df0298513b35796f63f242ea97134eKeith Busch 3565c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void bio_completion(struct nvme_dev *dev, void *ctx, 357b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion *cqe) 358b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 359eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = ctx; 360eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct bio *bio = iod->private; 361b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 status = le16_to_cpup(&cqe->status) >> 1; 362b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3639e59d091b0eb04f223ed037348e3d9e36f30e72bKeith Busch if (iod->nents) { 3642b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 365b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_data_dir(bio) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 3669e59d091b0eb04f223ed037348e3d9e36f30e72bKeith Busch nvme_end_io_acct(bio, iod->start_time); 3679e59d091b0eb04f223ed037348e3d9e36f30e72bKeith Busch } 368eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 369427e97080196548557b288517537ab7eb48c309fKeith Busch if (status) 3701ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, -EIO); 371427e97080196548557b288517537ab7eb48c309fKeith Busch else 3721ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, 0); 373b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 374b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 375184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* length is in bytes. gfp flags indicates whether we may sleep. */ 3765d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_setup_prps(struct nvme_dev *dev, struct nvme_common_command *cmd, 3775d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma struct nvme_iod *iod, int total_len, gfp_t gfp) 378ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox{ 37999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox struct dma_pool *pool; 380eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int length = total_len; 381eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct scatterlist *sg = iod->sg; 382ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int dma_len = sg_dma_len(sg); 383ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox u64 dma_addr = sg_dma_address(sg); 384ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int offset = offset_in_page(dma_addr); 385e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *prp_list; 386eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 387e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr_t prp_dma; 388eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int nprps, i; 389ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 390ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp1 = cpu_to_le64(dma_addr); 391ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox length -= (PAGE_SIZE - offset); 392ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= 0) 393eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 394ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 395ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len -= (PAGE_SIZE - offset); 396ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (dma_len) { 397ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr += (PAGE_SIZE - offset); 398ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } else { 399ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox sg = sg_next(sg); 400ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr = sg_dma_address(sg); 401ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len = sg_dma_len(sg); 402ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 403ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 404ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= PAGE_SIZE) { 405ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 406eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 407e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 408e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 409e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews nprps = DIV_ROUND_UP(length, PAGE_SIZE); 41099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (nprps <= (256 / 8)) { 41199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_small_pool; 412eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 0; 41399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } else { 41499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_page_pool; 415eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 1; 41699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 41799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 418b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 419b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (!prp_list) { 420b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 421eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 422eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return (total_len - length) + PAGE_SIZE; 423b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox } 424eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[0] = prp_list; 425eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->first_dma = prp_dma; 426e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews cmd->prp2 = cpu_to_le64(prp_dma); 427e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews i = 0; 428e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews for (;;) { 4297523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox if (i == PAGE_SIZE / 8) { 430e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *old_prp_list = prp_list; 431b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 432eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!prp_list) 433eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len - length; 434eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[iod->npages++] = prp_list; 4357523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox prp_list[0] = old_prp_list[i - 1]; 4367523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox old_prp_list[i - 1] = cpu_to_le64(prp_dma); 4377523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox i = 1; 438e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 439e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews prp_list[i++] = cpu_to_le64(dma_addr); 440e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len -= PAGE_SIZE; 441e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr += PAGE_SIZE; 442e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews length -= PAGE_SIZE; 443e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (length <= 0) 444e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews break; 445e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (dma_len > 0) 446e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews continue; 447e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews BUG_ON(dma_len < 0); 448e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews sg = sg_next(sg); 449e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr = sg_dma_address(sg); 450e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len = sg_dma_len(sg); 451ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 452ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 453eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 454ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox} 455ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 456427e97080196548557b288517537ab7eb48c309fKeith Buschstruct nvme_bio_pair { 457427e97080196548557b288517537ab7eb48c309fKeith Busch struct bio b1, b2, *parent; 458427e97080196548557b288517537ab7eb48c309fKeith Busch struct bio_vec *bv1, *bv2; 459427e97080196548557b288517537ab7eb48c309fKeith Busch int err; 460427e97080196548557b288517537ab7eb48c309fKeith Busch atomic_t cnt; 461427e97080196548557b288517537ab7eb48c309fKeith Busch}; 462427e97080196548557b288517537ab7eb48c309fKeith Busch 463427e97080196548557b288517537ab7eb48c309fKeith Buschstatic void nvme_bio_pair_endio(struct bio *bio, int err) 464427e97080196548557b288517537ab7eb48c309fKeith Busch{ 465427e97080196548557b288517537ab7eb48c309fKeith Busch struct nvme_bio_pair *bp = bio->bi_private; 466427e97080196548557b288517537ab7eb48c309fKeith Busch 467427e97080196548557b288517537ab7eb48c309fKeith Busch if (err) 468427e97080196548557b288517537ab7eb48c309fKeith Busch bp->err = err; 469427e97080196548557b288517537ab7eb48c309fKeith Busch 470427e97080196548557b288517537ab7eb48c309fKeith Busch if (atomic_dec_and_test(&bp->cnt)) { 471427e97080196548557b288517537ab7eb48c309fKeith Busch bio_endio(bp->parent, bp->err); 4721b56749e541ad59068582f2a28297843e243b856Keith Busch kfree(bp->bv1); 4731b56749e541ad59068582f2a28297843e243b856Keith Busch kfree(bp->bv2); 474427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp); 475427e97080196548557b288517537ab7eb48c309fKeith Busch } 476427e97080196548557b288517537ab7eb48c309fKeith Busch} 477427e97080196548557b288517537ab7eb48c309fKeith Busch 478427e97080196548557b288517537ab7eb48c309fKeith Buschstatic struct nvme_bio_pair *nvme_bio_split(struct bio *bio, int idx, 479427e97080196548557b288517537ab7eb48c309fKeith Busch int len, int offset) 480427e97080196548557b288517537ab7eb48c309fKeith Busch{ 481427e97080196548557b288517537ab7eb48c309fKeith Busch struct nvme_bio_pair *bp; 482427e97080196548557b288517537ab7eb48c309fKeith Busch 483427e97080196548557b288517537ab7eb48c309fKeith Busch BUG_ON(len > bio->bi_size); 484427e97080196548557b288517537ab7eb48c309fKeith Busch BUG_ON(idx > bio->bi_vcnt); 485427e97080196548557b288517537ab7eb48c309fKeith Busch 486427e97080196548557b288517537ab7eb48c309fKeith Busch bp = kmalloc(sizeof(*bp), GFP_ATOMIC); 487427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp) 488427e97080196548557b288517537ab7eb48c309fKeith Busch return NULL; 489427e97080196548557b288517537ab7eb48c309fKeith Busch bp->err = 0; 490427e97080196548557b288517537ab7eb48c309fKeith Busch 491427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1 = *bio; 492427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2 = *bio; 493427e97080196548557b288517537ab7eb48c309fKeith Busch 494427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_size = len; 495427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_size -= len; 496427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_vcnt = idx; 497427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_idx = idx; 498427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_sector += len >> 9; 499427e97080196548557b288517537ab7eb48c309fKeith Busch 500427e97080196548557b288517537ab7eb48c309fKeith Busch if (offset) { 501427e97080196548557b288517537ab7eb48c309fKeith Busch bp->bv1 = kmalloc(bio->bi_max_vecs * sizeof(struct bio_vec), 502427e97080196548557b288517537ab7eb48c309fKeith Busch GFP_ATOMIC); 503427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp->bv1) 504427e97080196548557b288517537ab7eb48c309fKeith Busch goto split_fail_1; 505427e97080196548557b288517537ab7eb48c309fKeith Busch 506427e97080196548557b288517537ab7eb48c309fKeith Busch bp->bv2 = kmalloc(bio->bi_max_vecs * sizeof(struct bio_vec), 507427e97080196548557b288517537ab7eb48c309fKeith Busch GFP_ATOMIC); 508427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp->bv2) 509427e97080196548557b288517537ab7eb48c309fKeith Busch goto split_fail_2; 510427e97080196548557b288517537ab7eb48c309fKeith Busch 511427e97080196548557b288517537ab7eb48c309fKeith Busch memcpy(bp->bv1, bio->bi_io_vec, 512427e97080196548557b288517537ab7eb48c309fKeith Busch bio->bi_max_vecs * sizeof(struct bio_vec)); 513427e97080196548557b288517537ab7eb48c309fKeith Busch memcpy(bp->bv2, bio->bi_io_vec, 514427e97080196548557b288517537ab7eb48c309fKeith Busch bio->bi_max_vecs * sizeof(struct bio_vec)); 515427e97080196548557b288517537ab7eb48c309fKeith Busch 516427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_io_vec = bp->bv1; 517427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_io_vec = bp->bv2; 518427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_io_vec[idx].bv_offset += offset; 519427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_io_vec[idx].bv_len -= offset; 520427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_io_vec[idx].bv_len = offset; 521427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_vcnt++; 522427e97080196548557b288517537ab7eb48c309fKeith Busch } else 523427e97080196548557b288517537ab7eb48c309fKeith Busch bp->bv1 = bp->bv2 = NULL; 524427e97080196548557b288517537ab7eb48c309fKeith Busch 525427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_private = bp; 526427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_private = bp; 527427e97080196548557b288517537ab7eb48c309fKeith Busch 528427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_end_io = nvme_bio_pair_endio; 529427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_end_io = nvme_bio_pair_endio; 530427e97080196548557b288517537ab7eb48c309fKeith Busch 531427e97080196548557b288517537ab7eb48c309fKeith Busch bp->parent = bio; 532427e97080196548557b288517537ab7eb48c309fKeith Busch atomic_set(&bp->cnt, 2); 533427e97080196548557b288517537ab7eb48c309fKeith Busch 534427e97080196548557b288517537ab7eb48c309fKeith Busch return bp; 535427e97080196548557b288517537ab7eb48c309fKeith Busch 536427e97080196548557b288517537ab7eb48c309fKeith Busch split_fail_2: 537427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp->bv1); 538427e97080196548557b288517537ab7eb48c309fKeith Busch split_fail_1: 539427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp); 540427e97080196548557b288517537ab7eb48c309fKeith Busch return NULL; 541427e97080196548557b288517537ab7eb48c309fKeith Busch} 542427e97080196548557b288517537ab7eb48c309fKeith Busch 543427e97080196548557b288517537ab7eb48c309fKeith Buschstatic int nvme_split_and_submit(struct bio *bio, struct nvme_queue *nvmeq, 544427e97080196548557b288517537ab7eb48c309fKeith Busch int idx, int len, int offset) 545427e97080196548557b288517537ab7eb48c309fKeith Busch{ 546427e97080196548557b288517537ab7eb48c309fKeith Busch struct nvme_bio_pair *bp = nvme_bio_split(bio, idx, len, offset); 547427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp) 548427e97080196548557b288517537ab7eb48c309fKeith Busch return -ENOMEM; 549427e97080196548557b288517537ab7eb48c309fKeith Busch 550427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 551427e97080196548557b288517537ab7eb48c309fKeith Busch add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 552427e97080196548557b288517537ab7eb48c309fKeith Busch bio_list_add(&nvmeq->sq_cong, &bp->b1); 553427e97080196548557b288517537ab7eb48c309fKeith Busch bio_list_add(&nvmeq->sq_cong, &bp->b2); 554427e97080196548557b288517537ab7eb48c309fKeith Busch 555427e97080196548557b288517537ab7eb48c309fKeith Busch return 0; 556427e97080196548557b288517537ab7eb48c309fKeith Busch} 557427e97080196548557b288517537ab7eb48c309fKeith Busch 5581ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox/* NVMe scatterlists require no holes in the virtual address */ 5591ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox#define BIOVEC_NOT_VIRT_MERGEABLE(vec1, vec2) ((vec2)->bv_offset || \ 5601ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox (((vec1)->bv_offset + (vec1)->bv_len) % PAGE_SIZE)) 5611ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox 562427e97080196548557b288517537ab7eb48c309fKeith Buschstatic int nvme_map_bio(struct nvme_queue *nvmeq, struct nvme_iod *iod, 563b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio, enum dma_data_direction dma_dir, int psegs) 564b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 565768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct bio_vec *bvec, *bvprv = NULL; 566768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct scatterlist *sg = NULL; 567159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch int i, length = 0, nsegs = 0, split_len = bio->bi_size; 568159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch 569159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (nvmeq->dev->stripe_size) 570159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch split_len = nvmeq->dev->stripe_size - 571159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch ((bio->bi_sector << 9) & (nvmeq->dev->stripe_size - 1)); 572b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 573eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg_init_table(iod->sg, psegs); 574b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_for_each_segment(bvec, bio, i) { 575768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox if (bvprv && BIOVEC_PHYS_MERGEABLE(bvprv, bvec)) { 576768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg->length += bvec->bv_len; 577768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } else { 5781ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox if (bvprv && BIOVEC_NOT_VIRT_MERGEABLE(bvprv, bvec)) 579427e97080196548557b288517537ab7eb48c309fKeith Busch return nvme_split_and_submit(bio, nvmeq, i, 580427e97080196548557b288517537ab7eb48c309fKeith Busch length, 0); 581427e97080196548557b288517537ab7eb48c309fKeith Busch 582eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = sg ? sg + 1 : iod->sg; 583768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_set_page(sg, bvec->bv_page, bvec->bv_len, 584768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvec->bv_offset); 585768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox nsegs++; 586768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } 587159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch 588159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (split_len - length < bvec->bv_len) 589159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch return nvme_split_and_submit(bio, nvmeq, i, split_len, 590159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch split_len - length); 5911ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length += bvec->bv_len; 592768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvprv = bvec; 593b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 594eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->nents = nsegs; 595768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_mark_end(sg); 596427e97080196548557b288517537ab7eb48c309fKeith Busch if (dma_map_sg(nvmeq->q_dmadev, iod->sg, iod->nents, dma_dir) == 0) 5971ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return -ENOMEM; 598427e97080196548557b288517537ab7eb48c309fKeith Busch 599159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch BUG_ON(length != bio->bi_size); 6001ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return length; 601b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 602b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6030e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch/* 6040e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * We reuse the small pool to allocate the 16-byte range here as it is not 6050e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * worth having a special pool for these or additional cases to handle freeing 6060e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * the iod. 6070e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch */ 6080e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic int nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, 6090e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct bio *bio, struct nvme_iod *iod, int cmdid) 6100e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 6110e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_dsm_range *range; 6120e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 6130e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6140e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range = dma_pool_alloc(nvmeq->dev->prp_small_pool, GFP_ATOMIC, 6150e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch &iod->first_dma); 6160e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (!range) 6170e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return -ENOMEM; 6180e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6190e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod_list(iod)[0] = (__le64 *)range; 6200e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod->npages = 0; 6210e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6220e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->cattr = cpu_to_le32(0); 6230e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->nlb = cpu_to_le32(bio->bi_size >> ns->lba_shift); 624063cc6d5591ea9c0631b81ac5c7b829d99738b2fMatthew Wilcox range->slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_sector)); 6250e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6260e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch memset(cmnd, 0, sizeof(*cmnd)); 6270e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.opcode = nvme_cmd_dsm; 6280e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.command_id = cmdid; 6290e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); 6300e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.prp1 = cpu_to_le64(iod->first_dma); 6310e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nr = 0; 6320e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); 6330e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6340e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (++nvmeq->sq_tail == nvmeq->q_depth) 6350e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvmeq->sq_tail = 0; 6360e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch writel(nvmeq->sq_tail, nvmeq->q_db); 6370e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6380e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return 0; 6390e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 6400e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 64100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcoxstatic int nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, 64200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid) 64300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 64400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 64500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 64600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 64700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.opcode = nvme_cmd_flush; 64800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.command_id = cmdid; 64900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.nsid = cpu_to_le32(ns->ns_id); 65000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 65100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 65200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox nvmeq->sq_tail = 0; 65300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 65400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 65500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return 0; 65600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 65700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 6585d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns) 65900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 66000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid = alloc_cmdid(nvmeq, (void *)CMD_CTX_FLUSH, 661ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox special_completion, NVME_IO_TIMEOUT); 66200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (unlikely(cmdid < 0)) 66300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return cmdid; 66400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 66500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 66600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 66700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 668184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 669184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 670184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 671b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns, 672b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio) 673b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 674ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox struct nvme_command *cmnd; 675eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 676b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox enum dma_data_direction dma_dir; 6771287dabd345f447bbe0f7a99fc95ab89bcfc0f5dWei Yongjun int cmdid, length, result; 678b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 control; 679b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 dsmgmt; 680b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int psegs = bio_phys_segments(ns->queue, bio); 681b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 68200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && psegs) { 68300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox result = nvme_submit_flush_data(nvmeq, ns); 68400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (result) 68500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return result; 68600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox } 68700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 6881287dabd345f447bbe0f7a99fc95ab89bcfc0f5dWei Yongjun result = -ENOMEM; 689eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(psegs, bio->bi_size, GFP_ATOMIC); 690eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!iod) 691eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox goto nomem; 692eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->private = bio; 693b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 694eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = -EBUSY; 695ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox cmdid = alloc_cmdid(nvmeq, iod, bio_completion, NVME_IO_TIMEOUT); 696b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (unlikely(cmdid < 0)) 697eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 698b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6990e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (bio->bi_rw & REQ_DISCARD) { 7000e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch result = nvme_submit_discard(nvmeq, ns, bio, iod, cmdid); 7010e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (result) 7020e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch goto free_cmdid; 7030e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return result; 7040e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch } 70500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && !psegs) 70600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 70700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 708b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control = 0; 709b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_FUA) 710b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_FUA; 711b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & (REQ_FAILFAST_DEV | REQ_RAHEAD)) 712b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_LR; 713b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 714b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt = 0; 715b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_RAHEAD) 716b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; 717b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 718ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 719b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 720b8deb62cf271fa9381edc8cf52bcae2f0225c55aMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 721b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio_data_dir(bio)) { 722ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_write; 723b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_TO_DEVICE; 724b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } else { 725ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_read; 726b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_FROM_DEVICE; 727b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 729427e97080196548557b288517537ab7eb48c309fKeith Busch result = nvme_map_bio(nvmeq, iod, bio, dma_dir, psegs); 730427e97080196548557b288517537ab7eb48c309fKeith Busch if (result <= 0) 731859361a228258edf4821d9f5635825033eca78e8Keith Busch goto free_cmdid; 7321ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length = result; 733b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 734ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.command_id = cmdid; 735ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.nsid = cpu_to_le32(ns->ns_id); 736eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(nvmeq->dev, &cmnd->common, iod, length, 737eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_ATOMIC); 738063cc6d5591ea9c0631b81ac5c7b829d99738b2fMatthew Wilcox cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_sector)); 7391ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox cmnd->rw.length = cpu_to_le16((length >> ns->lba_shift) - 1); 740ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.control = cpu_to_le16(control); 741ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); 742b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7436198221fa0df0298513b35796f63f242ea97134eKeith Busch nvme_start_io_acct(bio); 744b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 745b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = 0; 7467547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 747b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7481974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox return 0; 7491974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox 750859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid: 751859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid(nvmeq, cmdid, NULL); 752eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 753eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(nvmeq->dev, iod); 754eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox nomem: 755eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox return result; 756b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 757b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 758e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcoxstatic int nvme_process_cq(struct nvme_queue *nvmeq) 759b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 760821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 head, phase; 761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = nvmeq->cq_head; 763821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = nvmeq->cq_phase; 764b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 765b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (;;) { 766c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 767c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 768b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion cqe = nvmeq->cqes[head]; 769821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != phase) 770b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox break; 771b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 772b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++head == nvmeq->q_depth) { 773b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = 0; 774821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = !phase; 775b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 776b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 777c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = free_cmdid(nvmeq, cqe.command_id, &fn); 7785c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox fn(nvmeq->dev, ctx, &cqe); 779b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 780b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 781b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* If the controller ignores the cq head doorbell and continuously 782b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * writes to the queue, it is theoretically possible to wrap around 783b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the queue twice and mistakenly return IRQ_NONE. Linux only 784b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * requires that 0.1% of your interrupts are handled, so this isn't 785b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * a big problem. 786b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 787821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 788e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox return 0; 789b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 790b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu writel(head, nvmeq->q_db + nvmeq->dev->db_stride); 791b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = head; 792821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = phase; 793b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 794e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvmeq->cqe_seen = 1; 795e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox return 1; 796b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 797b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7987d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcoxstatic void nvme_make_request(struct request_queue *q, struct bio *bio) 7997d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox{ 8007d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox struct nvme_ns *ns = q->queuedata; 8017d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(ns->dev); 8027d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox int result = -EBUSY; 8037d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 804cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch if (!nvmeq) { 805cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch put_nvmeq(NULL); 806cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch bio_endio(bio, -EIO); 807cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return; 808cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch } 809cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 8107d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 811224042742582c9938788b81165180c876e997a07Keith Busch if (!nvmeq->q_suspended && bio_list_empty(&nvmeq->sq_cong)) 8127d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox result = nvme_submit_bio_queue(nvmeq, ns, bio); 8137d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox if (unlikely(result)) { 8147d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 8157d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 8167d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 8177d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox } 8187d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 8197d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox nvme_process_cq(nvmeq); 8207d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 8217d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox put_nvmeq(nvmeq); 8227d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox} 8237d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 824b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_irq(int irq, void *data) 825b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 82658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox irqreturn_t result; 82758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 82858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_lock(&nvmeq->q_lock); 829e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvme_process_cq(nvmeq); 830e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; 831e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvmeq->cqe_seen = 0; 83258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_unlock(&nvmeq->q_lock); 83358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return result; 83458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 83558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 83658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic irqreturn_t nvme_irq_check(int irq, void *data) 83758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox{ 83858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 83958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 84058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 84158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_NONE; 84258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_WAKE_THREAD; 84358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 84458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 8453c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic void nvme_abort_command(struct nvme_queue *nvmeq, int cmdid) 8463c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 8473c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 848c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cancel_cmdid(nvmeq, cmdid, NULL); 8493c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 8503c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 8513c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 852c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstruct sync_cmd_info { 853c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct task_struct *task; 854c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox u32 result; 855c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox int status; 856c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox}; 857c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 8585c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void sync_completion(struct nvme_dev *dev, void *ctx, 859c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 860c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 861c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct sync_cmd_info *cmdinfo = ctx; 862c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->result = le32_to_cpup(&cqe->result); 863c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 864c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox wake_up_process(cmdinfo->task); 865c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 866c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 867b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 868b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Returns 0 on success. If the result is negative, it's a Linux error code; 869b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * if the result is positive, it's an NVM Express status code 870b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 8715d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_sync_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd, 8725d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma u32 *result, unsigned timeout) 873b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 874b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 875b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct sync_cmd_info cmdinfo; 876b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 877b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.task = current; 878b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.status = -EINTR; 879b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 880c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdid = alloc_cmdid_killable(nvmeq, &cmdinfo, sync_completion, 881e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox timeout); 882b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid < 0) 883b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 884b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmd->common.command_id = cmdid; 885b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8863c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox set_current_state(TASK_KILLABLE); 8873c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_submit_cmd(nvmeq, cmd); 88878f8d2577bd79ce9d62f4d9e6d3b895bd1dd1d1dKeith Busch schedule_timeout(timeout); 889b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8903c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox if (cmdinfo.status == -EINTR) { 8913c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_abort_command(nvmeq, cmdid); 8923c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox return -EINTR; 8933c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox } 8943c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 895b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 896b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox *result = cmdinfo.result; 897b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 898b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdinfo.status; 899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 900b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9015d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, 902b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 *result) 903b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 904e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return nvme_submit_sync_cmd(dev->queues[0], cmd, result, ADMIN_TIMEOUT); 905b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 906b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 907b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 908b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 909b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 910b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 911b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 912b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 913b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.opcode = opcode; 914b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.qid = cpu_to_le16(id); 915b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 916b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 917b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 918b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 919b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 920b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 921b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 922b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 923b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 924b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 925b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 926b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 927b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 928b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 929b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 930b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.opcode = nvme_admin_create_cq; 931b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 932b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cqid = cpu_to_le16(qid); 933b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 934b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cq_flags = cpu_to_le16(flags); 935b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 936b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 937b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 938b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 939b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 940b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 941b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 942b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 943b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 944b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 945b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 946b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 947b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 948b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 949b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 950b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 951b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.opcode = nvme_admin_create_sq; 952b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 953b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sqid = cpu_to_le16(qid); 954b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 955b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sq_flags = cpu_to_le16(flags); 956b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.cqid = cpu_to_le16(qid); 957b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 958b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 959b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 960b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 961b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 962b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 963b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 964b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 965b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 966b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 967b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 968b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 969b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 970b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 971b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 972b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 973b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9745d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns, 975bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox dma_addr_t dma_addr) 976bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 977bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 978bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 979bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 980bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.opcode = nvme_admin_identify; 981bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.nsid = cpu_to_le32(nsid); 982bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.prp1 = cpu_to_le64(dma_addr); 983bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.cns = cpu_to_le32(cns); 984bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 985bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, NULL); 986bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 987bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 9885d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid, 98908df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr_t dma_addr, u32 *result) 990bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 991bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 992bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 993bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 994bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.opcode = nvme_admin_get_features; 995a42ceccef0c43b46ff6bc1b12a7c1076ef243df1Keith Busch c.features.nsid = cpu_to_le32(nsid); 996bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 997bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.fid = cpu_to_le32(fid); 998bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 99908df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch return nvme_submit_admin_cmd(dev, &c, result); 1000df3481399042200792822b6243e36a95a557b57eMatthew Wilcox} 1001df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 10025d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11, 10035d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma dma_addr_t dma_addr, u32 *result) 1004df3481399042200792822b6243e36a95a557b57eMatthew Wilcox{ 1005df3481399042200792822b6243e36a95a557b57eMatthew Wilcox struct nvme_command c; 1006df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 1007df3481399042200792822b6243e36a95a557b57eMatthew Wilcox memset(&c, 0, sizeof(c)); 1008df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.opcode = nvme_admin_set_features; 1009df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 1010df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.fid = cpu_to_le32(fid); 1011df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.dword11 = cpu_to_le32(dword11); 1012df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 1013bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, result); 1014bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 1015bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 1016a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox/** 1017c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * nvme_abort_cmd - Attempt aborting a command 1018c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * @cmdid: Command id of a timed out IO 1019c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * @queue: The queue with timed out IO 1020c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * 1021c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * Schedule controller reset if the command was already aborted once before and 1022c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch * still hasn't been returned to the driver, or if this is the admin queue. 1023c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch */ 1024c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Buschstatic void nvme_abort_cmd(int cmdid, struct nvme_queue *nvmeq) 1025c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch{ 1026c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch int a_cmdid; 1027c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch struct nvme_command cmd; 1028c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch struct nvme_dev *dev = nvmeq->dev; 1029c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 1030c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1031c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (!nvmeq->qid || info[cmdid].aborted) { 1032c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (work_busy(&dev->reset_work)) 1033c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1034c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch list_del_init(&dev->node); 1035c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev_warn(&dev->pci_dev->dev, 1036c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch "I/O %d QID %d timeout, reset controller\n", cmdid, 1037c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid); 1038c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch INIT_WORK(&dev->reset_work, nvme_reset_failed_dev); 1039c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch queue_work(nvme_workq, &dev->reset_work); 1040c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1041c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch } 1042c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1043c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (!dev->abort_limit) 1044c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1045c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1046c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch a_cmdid = alloc_cmdid(dev->queues[0], CMD_CTX_ABORT, special_completion, 1047c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch ADMIN_TIMEOUT); 1048c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (a_cmdid < 0) 1049c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch return; 1050c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1051c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch memset(&cmd, 0, sizeof(cmd)); 1052c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.opcode = nvme_admin_abort_cmd; 1053c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.cid = cmdid; 1054c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.sqid = cpu_to_le16(nvmeq->qid); 1055c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch cmd.abort.command_id = a_cmdid; 1056c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1057c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch --dev->abort_limit; 1058c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch info[cmdid].aborted = 1; 1059c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch info[cmdid].timeout = jiffies + ADMIN_TIMEOUT; 1060c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1061c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev_warn(nvmeq->q_dmadev, "Aborting I/O %d QID %d\n", cmdid, 1062c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid); 1063c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvme_submit_cmd(dev->queues[0], &cmd); 1064c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch} 1065c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch 1066c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch/** 1067a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * nvme_cancel_ios - Cancel outstanding I/Os 1068a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @queue: The queue to cancel I/Os on 1069a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @timeout: True to only cancel I/Os which have timed out 1070a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox */ 1071a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcoxstatic void nvme_cancel_ios(struct nvme_queue *nvmeq, bool timeout) 1072a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox{ 1073a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int depth = nvmeq->q_depth - 1; 1074a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 1075a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox unsigned long now = jiffies; 1076a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int cmdid; 1077a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1078a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox for_each_set_bit(cmdid, nvmeq->cmdid_data, depth) { 1079a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox void *ctx; 1080a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_completion_fn fn; 1081a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox static struct nvme_completion cqe = { 1082af2d9ca744af5e03390eeb3864d08ce75c860899Matthew Wilcox .status = cpu_to_le16(NVME_SC_ABORT_REQ << 1), 1083a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox }; 1084a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1085a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox if (timeout && !time_after(now, info[cmdid].timeout)) 1086a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox continue; 1087053ab702cc2702f25a97ead087ed344b864785b7Keith Busch if (info[cmdid].ctx == CMD_CTX_CANCELLED) 1088053ab702cc2702f25a97ead087ed344b864785b7Keith Busch continue; 1089c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch if (timeout && nvmeq->dev->initialized) { 1090c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvme_abort_cmd(cmdid, nvmeq); 1091c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch continue; 1092c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch } 1093c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d QID %d\n", cmdid, 1094c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid); 1095a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox ctx = cancel_cmdid(nvmeq, cmdid, &fn); 1096a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox fn(nvmeq->dev, ctx, &cqe); 1097a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox } 1098a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox} 1099a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1100224042742582c9938788b81165180c876e997a07Keith Buschstatic void nvme_free_queue(struct nvme_queue *nvmeq) 11019e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox{ 1102224042742582c9938788b81165180c876e997a07Keith Busch spin_lock_irq(&nvmeq->q_lock); 1103224042742582c9938788b81165180c876e997a07Keith Busch while (bio_list_peek(&nvmeq->sq_cong)) { 1104224042742582c9938788b81165180c876e997a07Keith Busch struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 1105224042742582c9938788b81165180c876e997a07Keith Busch bio_endio(bio, -EIO); 1106224042742582c9938788b81165180c876e997a07Keith Busch } 1107224042742582c9938788b81165180c876e997a07Keith Busch spin_unlock_irq(&nvmeq->q_lock); 1108224042742582c9938788b81165180c876e997a07Keith Busch 11099e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 11109e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 11119e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 11129e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 11139e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox kfree(nvmeq); 11149e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox} 11159e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 1116224042742582c9938788b81165180c876e997a07Keith Buschstatic void nvme_free_queues(struct nvme_dev *dev) 1117224042742582c9938788b81165180c876e997a07Keith Busch{ 1118224042742582c9938788b81165180c876e997a07Keith Busch int i; 1119224042742582c9938788b81165180c876e997a07Keith Busch 1120224042742582c9938788b81165180c876e997a07Keith Busch for (i = dev->queue_count - 1; i >= 0; i--) { 1121224042742582c9938788b81165180c876e997a07Keith Busch nvme_free_queue(dev->queues[i]); 1122224042742582c9938788b81165180c876e997a07Keith Busch dev->queue_count--; 1123224042742582c9938788b81165180c876e997a07Keith Busch dev->queues[i] = NULL; 1124224042742582c9938788b81165180c876e997a07Keith Busch } 1125224042742582c9938788b81165180c876e997a07Keith Busch} 1126224042742582c9938788b81165180c876e997a07Keith Busch 1127224042742582c9938788b81165180c876e997a07Keith Buschstatic void nvme_disable_queue(struct nvme_dev *dev, int qid) 1128b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1129b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = dev->queues[qid]; 1130aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox int vector = dev->entry[nvmeq->cq_vector].vector; 1131b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1132a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1133224042742582c9938788b81165180c876e997a07Keith Busch if (nvmeq->q_suspended) { 1134224042742582c9938788b81165180c876e997a07Keith Busch spin_unlock_irq(&nvmeq->q_lock); 1135224042742582c9938788b81165180c876e997a07Keith Busch return; 11363295874b6074d749516d6decd43afad7bf6e38ffKeith Busch } 1137224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->q_suspended = 1; 1138a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1139a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1140aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox irq_set_affinity_hint(vector, NULL); 1141aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox free_irq(vector, nvmeq); 1142b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11430e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch /* Don't tell the adapter to delete the admin queue. 11440e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch * Don't tell a removed adapter to delete IO queues. */ 11450e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch if (qid && readl(&dev->bar->csts) != -1) { 1146b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1147b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1148b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1149b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1150224042742582c9938788b81165180c876e997a07Keith Busch spin_lock_irq(&nvmeq->q_lock); 1151224042742582c9938788b81165180c876e997a07Keith Busch nvme_process_cq(nvmeq); 1152224042742582c9938788b81165180c876e997a07Keith Busch nvme_cancel_ios(nvmeq, false); 1153224042742582c9938788b81165180c876e997a07Keith Busch spin_unlock_irq(&nvmeq->q_lock); 1154b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1155b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1156b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 1157b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int depth, int vector) 1158b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1159b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1160224042742582c9938788b81165180c876e997a07Keith Busch unsigned extra = nvme_queue_extra(depth); 1161b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq) + extra, GFP_KERNEL); 1162b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq) 1163b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1164b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1165b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cqes = dma_alloc_coherent(dmadev, CQ_SIZE(depth), 1166b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->cq_dma_addr, GFP_KERNEL); 1167b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->cqes) 1168b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 1169b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset((void *)nvmeq->cqes, 0, CQ_SIZE(depth)); 1170b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1171b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds = dma_alloc_coherent(dmadev, SQ_SIZE(depth), 1172b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->sq_dma_addr, GFP_KERNEL); 1173b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->sq_cmds) 1174b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_cqdma; 1175b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1176b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_dmadev = dmadev; 1177091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvmeq->dev = dev; 1178b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_init(&nvmeq->q_lock); 1179b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = 0; 1180821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = 1; 1181b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox init_waitqueue_head(&nvmeq->sq_full); 11821fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox init_waitqueue_entry(&nvmeq->sq_cong_wait, nvme_thread); 1183b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_init(&nvmeq->sq_cong); 1184b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 1185b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_depth = depth; 1186b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_vector = vector; 1187c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch nvmeq->qid = qid; 1188224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->q_suspended = 1; 1189224042742582c9938788b81165180c876e997a07Keith Busch dev->queue_count++; 1190b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1191b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 1192b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1193b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_cqdma: 119468b8eca5f882230e4991df0db0a3094f49420a90Keith Busch dma_free_coherent(dmadev, CQ_SIZE(depth), (void *)nvmeq->cqes, 1195b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_dma_addr); 1196b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 1197b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 1198b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1199b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1200b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12013001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcoxstatic int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 12023001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox const char *name) 12033001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox{ 120458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if (use_threaded_interrupts) 120558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 1206481e5bad84239b01415b888df2040c1860ae3cfdMichael Opdenacker nvme_irq_check, nvme_irq, IRQF_SHARED, 120758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox name, nvmeq); 12083001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 1209481e5bad84239b01415b888df2040c1860ae3cfdMichael Opdenacker IRQF_SHARED, name, nvmeq); 12103001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox} 12113001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox 1212224042742582c9938788b81165180c876e997a07Keith Buschstatic void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) 1213b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1214224042742582c9938788b81165180c876e997a07Keith Busch struct nvme_dev *dev = nvmeq->dev; 1215224042742582c9938788b81165180c876e997a07Keith Busch unsigned extra = nvme_queue_extra(nvmeq->q_depth); 1216b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1217224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->sq_tail = 0; 1218224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->cq_head = 0; 1219224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->cq_phase = 1; 1220b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 1221224042742582c9938788b81165180c876e997a07Keith Busch memset(nvmeq->cmdid_data, 0, extra); 1222224042742582c9938788b81165180c876e997a07Keith Busch memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); 1223224042742582c9938788b81165180c876e997a07Keith Busch nvme_cancel_ios(nvmeq, false); 1224224042742582c9938788b81165180c876e997a07Keith Busch nvmeq->q_suspended = 0; 1225224042742582c9938788b81165180c876e997a07Keith Busch} 1226224042742582c9938788b81165180c876e997a07Keith Busch 1227224042742582c9938788b81165180c876e997a07Keith Buschstatic int nvme_create_queue(struct nvme_queue *nvmeq, int qid) 1228224042742582c9938788b81165180c876e997a07Keith Busch{ 1229224042742582c9938788b81165180c876e997a07Keith Busch struct nvme_dev *dev = nvmeq->dev; 1230224042742582c9938788b81165180c876e997a07Keith Busch int result; 12313f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox 1232b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_cq(dev, qid, nvmeq); 1233b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1234224042742582c9938788b81165180c876e997a07Keith Busch return result; 1235b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1236b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_sq(dev, qid, nvmeq); 1237b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1238b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_cq; 1239b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12403001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme"); 1241b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1242b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_sq; 1243b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12440a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1245224042742582c9938788b81165180c876e997a07Keith Busch nvme_init_queue(nvmeq, qid); 12460a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1247224042742582c9938788b81165180c876e997a07Keith Busch 1248224042742582c9938788b81165180c876e997a07Keith Busch return result; 1249b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1250b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_sq: 1251b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1252b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_cq: 1253b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1254224042742582c9938788b81165180c876e997a07Keith Busch return result; 1255b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1256b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1257ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_wait_ready(struct nvme_dev *dev, u64 cap, bool enabled) 1258ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 1259ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox unsigned long timeout; 1260ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox u32 bit = enabled ? NVME_CSTS_RDY : 0; 1261ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1262ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; 1263ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1264ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox while ((readl(&dev->bar->csts) & NVME_CSTS_RDY) != bit) { 1265ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox msleep(100); 1266ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (fatal_signal_pending(current)) 1267ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return -EINTR; 1268ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (time_after(jiffies, timeout)) { 1269ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox dev_err(&dev->pci_dev->dev, 1270ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox "Device not ready; aborting initialisation\n"); 1271ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return -ENODEV; 1272ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox } 1273ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox } 1274ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1275ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return 0; 1276ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1277ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1278ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox/* 1279ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * If the device has been passed off to us in an enabled state, just clear 1280ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * the enabled bit. The spec says we should set the 'shutdown notification 1281ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * bits', but doing so may cause the device to complete commands to the 1282ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * admin queue ... and we don't know what memory that might be pointing at! 1283ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox */ 1284ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_disable_ctrl(struct nvme_dev *dev, u64 cap) 1285ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 128644af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox u32 cc = readl(&dev->bar->cc); 128744af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox 128844af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox if (cc & NVME_CC_ENABLE) 128944af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox writel(cc & ~NVME_CC_ENABLE, &dev->bar->cc); 1290ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return nvme_wait_ready(dev, cap, false); 1291ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1292ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1293ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap) 1294ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 1295ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return nvme_wait_ready(dev, cap, true); 1296ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1297ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 12981894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Buschstatic int nvme_shutdown_ctrl(struct nvme_dev *dev) 12991894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch{ 13001894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch unsigned long timeout; 13011894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch u32 cc; 13021894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 13031894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch cc = (readl(&dev->bar->cc) & ~NVME_CC_SHN_MASK) | NVME_CC_SHN_NORMAL; 13041894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch writel(cc, &dev->bar->cc); 13051894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 13061894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch timeout = 2 * HZ + jiffies; 13071894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch while ((readl(&dev->bar->csts) & NVME_CSTS_SHST_MASK) != 13081894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch NVME_CSTS_SHST_CMPLT) { 13091894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch msleep(100); 13101894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch if (fatal_signal_pending(current)) 13111894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch return -EINTR; 13121894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch if (time_after(jiffies, timeout)) { 13131894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch dev_err(&dev->pci_dev->dev, 13141894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch "Device shutdown incomplete; abort shutdown\n"); 13151894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch return -ENODEV; 13161894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch } 13171894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch } 13181894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 13191894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch return 0; 13201894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch} 13211894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch 13228d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_configure_admin_queue(struct nvme_dev *dev) 1323b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1324ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox int result; 1325b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 aqa; 1326ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox u64 cap = readq(&dev->bar->cap); 1327b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq; 1328b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1329ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox result = nvme_disable_ctrl(dev, cap); 1330ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (result < 0) 1331ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return result; 1332b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1333cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvmeq = dev->queues[0]; 1334cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch if (!nvmeq) { 1335cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvmeq = nvme_alloc_queue(dev, 0, 64, 0); 1336cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch if (!nvmeq) 1337cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return -ENOMEM; 1338cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch dev->queues[0] = nvmeq; 1339cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch } 1340b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1341b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa = nvmeq->q_depth - 1; 1342b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa |= aqa << 16; 1343b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1344b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config = NVME_CC_ENABLE | NVME_CC_CSS_NVM; 1345b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= (PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; 1346b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; 13477f53f9d2424533256ae86f7df5661a17de743de8Matthew Wilcox dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; 1348b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1349b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(aqa, &dev->bar->aqa); 1350b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->sq_dma_addr, &dev->bar->asq); 1351b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->cq_dma_addr, &dev->bar->acq); 1352b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(dev->ctrl_config, &dev->bar->cc); 1353b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1354ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox result = nvme_enable_ctrl(dev, cap); 1355025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1356cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return result; 13579e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 13583001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme admin"); 1359025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1360cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return result; 1361025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch 13620a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1363224042742582c9938788b81165180c876e997a07Keith Busch nvme_init_queue(nvmeq, 0); 13640a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1365b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1366b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1367b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 13685d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermastruct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, 1369eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned long addr, unsigned length) 1370b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 137136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox int i, err, count, nents, offset; 13727fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct scatterlist *sg; 13737fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct page **pages; 1374eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 137536c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 137636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (addr & 3) 1377eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 13785460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter if (!length || length > INT_MAX - PAGE_SIZE) 1379eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 13807fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 138136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox offset = offset_in_page(addr); 13827fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox count = DIV_ROUND_UP(offset + length, PAGE_SIZE); 13837fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox pages = kcalloc(count, sizeof(*pages), GFP_KERNEL); 138422fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter if (!pages) 138522fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter return ERR_PTR(-ENOMEM); 138636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 138736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = get_user_pages_fast(addr, count, 1, pages); 138836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (err < count) { 138936c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox count = err; 139036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = -EFAULT; 139136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox goto put_pages; 139236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox } 13937fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 1394eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(count, length, GFP_KERNEL); 1395eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = iod->sg; 139636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox sg_init_table(sg, count); 1397d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox for (i = 0; i < count; i++) { 1398d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox sg_set_page(&sg[i], pages[i], 13995460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter min_t(unsigned, length, PAGE_SIZE - offset), 14005460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter offset); 1401d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox length -= (PAGE_SIZE - offset); 1402d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox offset = 0; 14037fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox } 1404fe304c43c6d63e29ed4fc46a874d7a74313788c5Matthew Wilcox sg_mark_end(&sg[i - 1]); 14051c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox iod->nents = count; 14067fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 14077fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox err = -ENOMEM; 14087fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox nents = dma_map_sg(&dev->pci_dev->dev, sg, count, 14097fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 141036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (!nents) 1411eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 1412b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14137fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1414eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 1415b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1416eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 1417eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 14187fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_pages: 14197fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox for (i = 0; i < count; i++) 14207fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_page(pages[i]); 14217fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1422eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(err); 14237fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1424b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14255d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_unmap_user_pages(struct nvme_dev *dev, int write, 14261c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox struct nvme_iod *iod) 14277fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox{ 14281c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox int i; 1429b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14301c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 14311c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 14327fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 14331c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox for (i = 0; i < iod->nents; i++) 14341c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox put_page(sg_page(&iod->sg[i])); 14357fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1436b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1437a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcoxstatic int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) 1438a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox{ 1439a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_dev *dev = ns->dev; 1440a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_queue *nvmeq; 1441a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_user_io io; 1442a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_command c; 1443f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch unsigned length, meta_len; 1444f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int status, i; 1445f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch struct nvme_iod *iod, *meta_iod = NULL; 1446f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch dma_addr_t meta_dma_addr; 1447f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch void *meta, *uninitialized_var(meta_mem); 1448a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1449a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox if (copy_from_user(&io, uio, sizeof(io))) 1450a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return -EFAULT; 14516c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox length = (io.nblocks + 1) << ns->lba_shift; 1452f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_len = (io.nblocks + 1) * ns->ms; 1453f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1454f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len && ((io.metadata & 3) || !io.metadata)) 1455f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch return -EINVAL; 14566c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 14576c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox switch (io.opcode) { 14586c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_write: 14596c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_read: 14606bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case nvme_cmd_compare: 1461eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_map_user_pages(dev, io.opcode & 1, io.addr, length); 14626413214c5d424fd5aae6567848340f962ad2ce0fMatthew Wilcox break; 14636c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox default: 14646bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EINVAL; 14656c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox } 14666c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 1467eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1468eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1469a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1470a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox memset(&c, 0, sizeof(c)); 1471a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.opcode = io.opcode; 1472a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.flags = io.flags; 14736c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.nsid = cpu_to_le32(ns->ns_id); 1474a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.slba = cpu_to_le64(io.slba); 14756c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.length = cpu_to_le16(io.nblocks); 1476a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.control = cpu_to_le16(io.control); 14771c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); 14781c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.reftag = cpu_to_le32(io.reftag); 14791c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.apptag = cpu_to_le16(io.apptag); 14801c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.appmask = cpu_to_le16(io.appmask); 1481f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1482f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len) { 14831b56749e541ad59068582f2a28297843e243b856Keith Busch meta_iod = nvme_map_user_pages(dev, io.opcode & 1, io.metadata, 14841b56749e541ad59068582f2a28297843e243b856Keith Busch meta_len); 1485f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (IS_ERR(meta_iod)) { 1486f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch status = PTR_ERR(meta_iod); 1487f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod = NULL; 1488f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch goto unmap; 1489f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1490f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1491f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_mem = dma_alloc_coherent(&dev->pci_dev->dev, meta_len, 1492f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch &meta_dma_addr, GFP_KERNEL); 1493f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (!meta_mem) { 1494f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch status = -ENOMEM; 1495f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch goto unmap; 1496f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1497f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1498f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (io.opcode & 1) { 1499f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int meta_offset = 0; 1500f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1501f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch for (i = 0; i < meta_iod->nents; i++) { 1502f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + 1503f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].offset; 1504f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch memcpy(meta_mem + meta_offset, meta, 1505f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].length); 1506f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch kunmap_atomic(meta); 1507f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_offset += meta_iod->sg[i].length; 1508f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1509f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1510f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1511f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch c.rw.metadata = cpu_to_le64(meta_dma_addr); 1512f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1513f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1514eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, GFP_KERNEL); 1515a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1516040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox nvmeq = get_nvmeq(dev); 1517fa92282149842645931580225647238428374758Matthew Wilcox /* 1518fa92282149842645931580225647238428374758Matthew Wilcox * Since nvme_submit_sync_cmd sleeps, we can't keep preemption 1519b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * disabled. We may be preempted at any point, and be rescheduled 1520b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * to a different CPU. That will cause cacheline bouncing, but no 1521b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * additional races since q_lock already protects against other CPUs. 1522b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox */ 1523a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox put_nvmeq(nvmeq); 1524b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (length != (io.nblocks + 1) << ns->lba_shift) 1525b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1526224042742582c9938788b81165180c876e997a07Keith Busch else if (!nvmeq || nvmeq->q_suspended) 1527224042742582c9938788b81165180c876e997a07Keith Busch status = -EBUSY; 1528b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1529ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox status = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT); 1530a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1531f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len) { 1532f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (status == NVME_SC_SUCCESS && !(io.opcode & 1)) { 1533f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int meta_offset = 0; 1534f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1535f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch for (i = 0; i < meta_iod->nents; i++) { 1536f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + 1537f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].offset; 1538f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch memcpy(meta, meta_mem + meta_offset, 1539f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].length); 1540f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch kunmap_atomic(meta); 1541f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_offset += meta_iod->sg[i].length; 1542f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1543f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1544f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1545f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch dma_free_coherent(&dev->pci_dev->dev, meta_len, meta_mem, 1546f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_dma_addr); 1547f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1548f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1549f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch unmap: 15501c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, io.opcode & 1, iod); 1551eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 1552f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1553f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_iod) { 1554f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch nvme_unmap_user_pages(dev, io.opcode & 1, meta_iod); 1555f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch nvme_free_iod(dev, meta_iod); 1556f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1557f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1558a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return status; 1559a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox} 1560a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 156150af8baec46a99a9b81a4600c0374f83a5a590a9Keith Buschstatic int nvme_user_admin_cmd(struct nvme_dev *dev, 15626bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd __user *ucmd) 15636ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox{ 15646bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd cmd; 15656ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox struct nvme_command c; 1566eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status, length; 1567c7d36ab8fa04c213328119a9c0d66985fe204ee5Keith Busch struct nvme_iod *uninitialized_var(iod); 156894f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch unsigned timeout; 15696ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 15706bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (!capable(CAP_SYS_ADMIN)) 15716bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EACCES; 15726bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (copy_from_user(&cmd, ucmd, sizeof(cmd))) 15736ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return -EFAULT; 15746ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 15756ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox memset(&c, 0, sizeof(c)); 15766bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.opcode = cmd.opcode; 15776bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.flags = cmd.flags; 15786bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.nsid = cpu_to_le32(cmd.nsid); 15796bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); 15806bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); 15816bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); 15826bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); 15836bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); 15846bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); 15856bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); 15866bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); 15876bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 15886bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox length = cmd.data_len; 15896bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 1590497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox iod = nvme_map_user_pages(dev, cmd.opcode & 1, cmd.addr, 1591497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox length); 1592eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1593eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1594eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, 1595eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_KERNEL); 15966bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 15976bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 159894f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch timeout = cmd.timeout_ms ? msecs_to_jiffies(cmd.timeout_ms) : 159994f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch ADMIN_TIMEOUT; 16006bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (length != cmd.data_len) 1601b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1602b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 160394f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch status = nvme_submit_sync_cmd(dev->queues[0], &c, &cmd.result, 160494f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch timeout); 1605eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 16066bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 16071c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, cmd.opcode & 1, iod); 1608eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 16096bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 1610f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 1611cf90bc4830b858487fe4b9b9ecd0031e23ca3e83Chayan Biswas if ((status >= 0) && copy_to_user(&ucmd->result, &cmd.result, 1612f4f117f64baf8840d22266d518227b2a186d294bKeith Busch sizeof(cmd.result))) 1613f4f117f64baf8840d22266d518227b2a186d294bKeith Busch status = -EFAULT; 1614f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 16156ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return status; 16166ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox} 16176ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 1618b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 1619b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long arg) 1620b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1621b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = bdev->bd_disk->private_data; 1622b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1623b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox switch (cmd) { 16246bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ID: 1625c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox force_successful_syscall_return(); 16266bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return ns->ns_id; 16276bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ADMIN_CMD: 162850af8baec46a99a9b81a4600c0374f83a5a590a9Keith Busch return nvme_user_admin_cmd(ns->dev, (void __user *)arg); 1629a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox case NVME_IOCTL_SUBMIT_IO: 1630a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return nvme_submit_io(ns, (void __user *)arg); 16315d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_GET_VERSION_NUM: 16325d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_get_version_num((void __user *)arg); 16335d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_IO: 16345d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_io(ns, (void __user *)arg); 1635b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox default: 1636b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOTTY; 1637b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1638b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1639b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1640320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#ifdef CONFIG_COMPAT 1641320a382746e0ab1304476ea7e986a8d416ab99dbKeith Buschstatic int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, 1642320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch unsigned int cmd, unsigned long arg) 1643320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch{ 1644320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch struct nvme_ns *ns = bdev->bd_disk->private_data; 1645320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch 1646320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch switch (cmd) { 1647320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch case SG_IO: 1648320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch return nvme_sg_io32(ns, arg); 1649320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch } 1650320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch return nvme_ioctl(bdev, mode, cmd, arg); 1651320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch} 1652320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#else 1653320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#define nvme_compat_ioctl NULL 1654320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch#endif 1655320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch 1656b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic const struct block_device_operations nvme_fops = { 1657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .owner = THIS_MODULE, 1658b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .ioctl = nvme_ioctl, 1659320a382746e0ab1304476ea7e986a8d416ab99dbKeith Busch .compat_ioctl = nvme_compat_ioctl, 1660b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1661b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16621fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic void nvme_resubmit_bios(struct nvme_queue *nvmeq) 16631fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 16641fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (bio_list_peek(&nvmeq->sq_cong)) { 16651fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 16661fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data; 1667427e97080196548557b288517537ab7eb48c309fKeith Busch 1668427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 1669427e97080196548557b288517537ab7eb48c309fKeith Busch remove_wait_queue(&nvmeq->sq_full, 1670427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 16711fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_submit_bio_queue(nvmeq, ns, bio)) { 1672427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 1673427e97080196548557b288517537ab7eb48c309fKeith Busch add_wait_queue(&nvmeq->sq_full, 1674427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 16751fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox bio_list_add_head(&nvmeq->sq_cong, bio); 16761fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox break; 16771fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 16781fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 16791fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 16801fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 16811fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic int nvme_kthread(void *data) 16821fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 1683d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch struct nvme_dev *dev, *next; 16841fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 16851fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (!kthread_should_stop()) { 1686564a232c059913d91b491e04c2b2d670b8f94615Arjan van de Ven set_current_state(TASK_INTERRUPTIBLE); 16871fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 1688d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch list_for_each_entry_safe(dev, next, &dev_list, node) { 16891fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox int i; 1690d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch if (readl(&dev->bar->csts) & NVME_CSTS_CFS && 1691d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized) { 1692d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch if (work_busy(&dev->reset_work)) 1693d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch continue; 1694d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch list_del_init(&dev->node); 1695d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev_warn(&dev->pci_dev->dev, 1696d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch "Failed status, reset controller\n"); 1697d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch INIT_WORK(&dev->reset_work, 1698d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch nvme_reset_failed_dev); 1699d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch queue_work(nvme_workq, &dev->reset_work); 1700d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch continue; 1701d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch } 17021fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox for (i = 0; i < dev->queue_count; i++) { 17031fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_queue *nvmeq = dev->queues[i]; 1704740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (!nvmeq) 1705740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox continue; 17061fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1707224042742582c9938788b81165180c876e997a07Keith Busch if (nvmeq->q_suspended) 1708224042742582c9938788b81165180c876e997a07Keith Busch goto unlock; 1709bc57a0f7a44cfcf3e9873f6c6b8dcecdca486b1fMatthew Wilcox nvme_process_cq(nvmeq); 1710a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_cancel_ios(nvmeq, true); 17111fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_resubmit_bios(nvmeq); 1712224042742582c9938788b81165180c876e997a07Keith Busch unlock: 17131fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 17141fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 17151fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 17161fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 1717acb7aa0db09b8abd38abeb84334a8a27a52fbb1bArjan van de Ven schedule_timeout(round_jiffies_relative(HZ)); 17181fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 17191fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 17201fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 17211fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 17225aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic DEFINE_IDA(nvme_index_ida); 17235aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 17245aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic int nvme_get_ns_idx(void) 17255aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 17265aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index, error; 17275aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 17285aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox do { 17295aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (!ida_pre_get(&nvme_index_ida, GFP_KERNEL)) 17305aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return -1; 17315aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 17325aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 17335aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox error = ida_get_new(&nvme_index_ida, &index); 17345aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 17355aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox } while (error == -EAGAIN); 17365aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 17375aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (error) 17385aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox index = -1; 17395aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return index; 17405aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 17415aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 17425aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic void nvme_put_ns_idx(int index) 17435aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 17445aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 17455aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ida_remove(&nvme_index_ida, index); 17465aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 17475aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 17485aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 17490e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic void nvme_config_discard(struct nvme_ns *ns) 17500e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 17510e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch u32 logical_block_size = queue_logical_block_size(ns->queue); 17520e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_zeroes_data = 0; 17530e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_alignment = logical_block_size; 17540e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_granularity = logical_block_size; 17550e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.max_discard_sectors = 0xffffffff; 17560e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); 17570e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 17580e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 1759c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcoxstatic struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid, 1760b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_id_ns *id, struct nvme_lba_range_type *rt) 1761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns; 1763b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct gendisk *disk; 1764b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int lbaf; 1765b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1766b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (rt->attributes & NVME_LBART_ATTRIB_HIDE) 1767b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1768b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1769b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns = kzalloc(sizeof(*ns), GFP_KERNEL); 1770b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns) 1771b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1772b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue = blk_alloc_queue(GFP_KERNEL); 1773b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns->queue) 1774b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_ns; 17754eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox ns->queue->queue_flags = QUEUE_FLAG_DEFAULT; 17764eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); 17774eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); 1778b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_queue_make_request(ns->queue, nvme_make_request); 1779b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->dev = dev; 1780b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue->queuedata = ns; 1781b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1782b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk = alloc_disk(NVME_MINORS); 1783b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!disk) 1784b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_queue; 17855aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ns->ns_id = nsid; 1786b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->disk = disk; 1787b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox lbaf = id->flbas & 0xf; 1788b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->lba_shift = id->lbaf[lbaf].ds; 1789f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); 1790e9ef46369f5107e634a93b7fc4e62a1f53343197Keith Busch blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); 17918fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch if (dev->max_hw_sectors) 17928fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); 1793b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1794b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->major = nvme_major; 1795b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->minors = NVME_MINORS; 17965aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox disk->first_minor = NVME_MINORS * nvme_get_ns_idx(); 1797b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->fops = &nvme_fops; 1798b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->private_data = ns; 1799b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->queue = ns->queue; 1800388f037f4e7f0a24bac6b1a24f144f5d939f58cfMatthew Wilcox disk->driverfs_dev = &dev->pci_dev->dev; 18015aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); 1802b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); 1803b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18040e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (dev->oncs & NVME_CTRL_ONCS_DSM) 18050e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvme_config_discard(ns); 18060e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 1807b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return ns; 1808b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1809b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_queue: 1810b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1811b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_ns: 1812b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1813b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1814b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1815b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1816b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_ns_free(struct nvme_ns *ns) 1817b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 18185aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index = ns->disk->first_minor / NVME_MINORS; 1819b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_disk(ns->disk); 18205aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox nvme_put_ns_idx(index); 1821b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1822b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1823b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1824b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1825b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcoxstatic int set_queue_count(struct nvme_dev *dev, int count) 1826b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1827b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 1828b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 result; 1829b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcox u32 q_count = (count - 1) | ((count - 1) << 16); 1830b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1831df3481399042200792822b6243e36a95a557b57eMatthew Wilcox status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, 1832bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox &result); 1833b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 18347e03b124065507e72008ef294c30001eca74a031Keith Busch return status < 0 ? -EIO : -EBUSY; 1835b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return min(result & 0xffff, result >> 16) + 1; 1836b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1837b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18389d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Buschstatic size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) 18399d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch{ 1840b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu return 4096 + ((nr_io_queues + 1) * 8 * dev->db_stride); 18419d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch} 18429d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch 18438d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_setup_io_queues(struct nvme_dev *dev) 1844b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1845fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula struct pci_dev *pdev = dev->pci_dev; 18469d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch int result, cpu, i, vecs, nr_io_queues, size, q_depth; 1847b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1848b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = num_online_cpus(); 1849b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = set_queue_count(dev, nr_io_queues); 18501b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result < 0) 18511b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox return result; 1852b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox if (result < nr_io_queues) 1853b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 1854b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18559d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch size = db_bar_size(dev, nr_io_queues); 18569d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (size > 8192) { 1857f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox iounmap(dev->bar); 18589d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch do { 18599d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch dev->bar = ioremap(pci_resource_start(pdev, 0), size); 18609d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (dev->bar) 18619d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch break; 18629d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (!--nr_io_queues) 18639d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch return -ENOMEM; 18649d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch size = db_bar_size(dev, nr_io_queues); 18659d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch } while (1); 1866f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1867f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->queues[0]->q_db = dev->dbs; 1868f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox } 1869f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox 18709d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch /* Deregister the admin queue's interrupt */ 18719d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch free_irq(dev->entry[0].vector, dev->queues[0]); 18729d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch 1873063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = nr_io_queues; 1874063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox for (i = 0; i < vecs; i++) 18751b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->entry[i].entry = i; 18761b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox for (;;) { 1877063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox result = pci_enable_msix(pdev, dev->entry, vecs); 1878063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox if (result <= 0) 18791b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 1880063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = result; 18811b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 18821b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1883063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox if (result < 0) { 1884063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = nr_io_queues; 1885063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox if (vecs > 32) 1886063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = 32; 1887fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula for (;;) { 1888063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox result = pci_enable_msi_block(pdev, vecs); 1889fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula if (result == 0) { 1890063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox for (i = 0; i < vecs; i++) 1891fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula dev->entry[i].vector = i + pdev->irq; 1892fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula break; 1893063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox } else if (result < 0) { 1894063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = 1; 1895fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula break; 1896fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 1897063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = result; 1898fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 1899fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 1900fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula 1901063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox /* 1902063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * Should investigate if there's a performance win from allocating 1903063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * more queues than interrupt vectors; it might allow the submission 1904063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * path to scale better, even if the receive path is limited by the 1905063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * number of interrupts. 1906063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox */ 1907063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox nr_io_queues = vecs; 1908063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox 19091b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox result = queue_request_irq(dev, dev->queues[0], "nvme admin"); 19109d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch if (result) { 19119d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch dev->queues[0]->q_suspended = 1; 1912224042742582c9938788b81165180c876e997a07Keith Busch goto free_queues; 19139d713c2bfb5e1d6abb18a8b12293631f9fcdc708Keith Busch } 19141b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1915cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch /* Free previously allocated queues that are no longer usable */ 1916cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch spin_lock(&dev_list_lock); 1917cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch for (i = dev->queue_count - 1; i > nr_io_queues; i--) { 1918cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct nvme_queue *nvmeq = dev->queues[i]; 1919cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 19200a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1921cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvme_cancel_ios(nvmeq, false); 19220a8d44cb33377969337fa6c1961b631605d5f453Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1923cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 1924cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvme_free_queue(nvmeq); 1925cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch dev->queue_count--; 1926cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch dev->queues[i] = NULL; 1927cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch } 1928cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch spin_unlock(&dev_list_lock); 1929cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 19301b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_first(cpu_online_mask); 1931b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 19321b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox irq_set_affinity_hint(dev->entry[i].vector, get_cpu_mask(cpu)); 19331b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_next(cpu, cpu_online_mask); 19341b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 19351b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1936a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch q_depth = min_t(int, NVME_CAP_MQES(readq(&dev->bar->cap)) + 1, 1937a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch NVME_Q_DEPTH); 1938cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch for (i = dev->queue_count - 1; i < nr_io_queues; i++) { 1939224042742582c9938788b81165180c876e997a07Keith Busch dev->queues[i + 1] = nvme_alloc_queue(dev, i + 1, q_depth, i); 1940224042742582c9938788b81165180c876e997a07Keith Busch if (!dev->queues[i + 1]) { 1941224042742582c9938788b81165180c876e997a07Keith Busch result = -ENOMEM; 1942224042742582c9938788b81165180c876e997a07Keith Busch goto free_queues; 1943224042742582c9938788b81165180c876e997a07Keith Busch } 19441b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 1945b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19469ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox for (; i < num_possible_cpus(); i++) { 19479ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox int target = i % rounddown_pow_of_two(dev->queue_count - 1); 19489ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox dev->queues[i + 1] = dev->queues[target + 1]; 19499ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox } 19509ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox 1951224042742582c9938788b81165180c876e997a07Keith Busch for (i = 1; i < dev->queue_count; i++) { 1952224042742582c9938788b81165180c876e997a07Keith Busch result = nvme_create_queue(dev->queues[i], i); 1953224042742582c9938788b81165180c876e997a07Keith Busch if (result) { 1954224042742582c9938788b81165180c876e997a07Keith Busch for (--i; i > 0; i--) 1955224042742582c9938788b81165180c876e997a07Keith Busch nvme_disable_queue(dev, i); 1956224042742582c9938788b81165180c876e997a07Keith Busch goto free_queues; 1957224042742582c9938788b81165180c876e997a07Keith Busch } 1958224042742582c9938788b81165180c876e997a07Keith Busch } 1959b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1960224042742582c9938788b81165180c876e997a07Keith Busch return 0; 1961b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1962224042742582c9938788b81165180c876e997a07Keith Busch free_queues: 1963224042742582c9938788b81165180c876e997a07Keith Busch nvme_free_queues(dev); 1964224042742582c9938788b81165180c876e997a07Keith Busch return result; 1965b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1966b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1967422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox/* 1968422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Return: error value if an error occurred setting up the queues or calling 1969422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Identify Device. 0 if these succeeded, even if adding some of the 1970422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * namespaces failed. At the moment, these failures are silent. TBD which 1971422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * failures should be reported. 1972422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox */ 19738d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_dev_add(struct nvme_dev *dev) 1974b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 197568608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox struct pci_dev *pdev = dev->pci_dev; 1976c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox int res; 1977c3bfe7176c035a0a2c70bc79180fb13a6c57142aMatthew Wilcox unsigned nn, i; 1978cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch struct nvme_ns *ns; 197951814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox struct nvme_id_ctrl *ctrl; 1980bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_id_ns *id_ns; 1981bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox void *mem; 1982b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t dma_addr; 1983159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12; 1984b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 198568608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox mem = dma_alloc_coherent(&pdev->dev, 8192, &dma_addr, GFP_KERNEL); 1986a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch if (!mem) 1987a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch return -ENOMEM; 1988b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1989bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, 0, 1, dma_addr); 1990b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) { 1991b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = -EIO; 1992cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch goto out; 1993b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1994b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1995bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ctrl = mem; 199651814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox nn = le32_to_cpup(&ctrl->nn); 19970e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch dev->oncs = le16_to_cpup(&ctrl->oncs); 1998c30341dc3c436cf43508cd44cdfbb3810c38c195Keith Busch dev->abort_limit = ctrl->acl + 1; 199951814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); 200051814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); 200151814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); 2002159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (ctrl->mdts) 20038fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); 200468608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox if ((pdev->vendor == PCI_VENDOR_ID_INTEL) && 200568608c268bf265b039daeaafee6c902dfef32024Matthew Wilcox (pdev->device == 0x0953) && ctrl->vs[3]) 2006159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch dev->stripe_size = 1 << (ctrl->vs[3] + shift); 2007b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2008bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox id_ns = mem; 20092b2c1896871838cdf549442e8ad0264be5fa74e3Matthew Wilcox for (i = 1; i <= nn; i++) { 2010bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, i, 0, dma_addr); 2011b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 2012b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 2013b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2014bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox if (id_ns->ncap == 0) 2015b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 2016b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2017bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_get_features(dev, NVME_FEAT_LBA_RANGE, i, 201808df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr + 4096, NULL); 2019b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 2020122090366d1d5c6ec1bfb6dfdb3a6d121ff074aaKeith Busch memset(mem + 4096, 0, 4096); 2021b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2022bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ns = nvme_alloc_ns(dev, i, mem, mem + 4096); 2023b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (ns) 2024b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_add_tail(&ns->list, &dev->namespaces); 2025b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 2026b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry(ns, &dev->namespaces, list) 2027b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox add_disk(ns->disk); 2028422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox res = 0; 2029b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2030bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox out: 2031684f5c2025b067a23722e620d0b3b858d8dc5d01Matthew Wilcox dma_free_coherent(&dev->pci_dev->dev, 8192, mem, dma_addr); 2032b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 2033b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2034b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 20350877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Buschstatic int nvme_dev_map(struct nvme_dev *dev) 20360877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch{ 20370877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch int bars, result = -ENOMEM; 20380877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch struct pci_dev *pdev = dev->pci_dev; 20390877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20400877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (pci_enable_device_mem(pdev)) 20410877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch return result; 20420877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20430877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->entry[0].vector = pdev->irq; 20440877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_set_master(pdev); 20450877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch bars = pci_select_bars(pdev, IORESOURCE_MEM); 20460877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (pci_request_selected_regions(pdev, bars, "nvme")) 20470877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto disable_pci; 20480877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 2049052d0efada8ccfccd924059b75f5fb119cd10f9aRussell King if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) && 2050052d0efada8ccfccd924059b75f5fb119cd10f9aRussell King dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) 2051052d0efada8ccfccd924059b75f5fb119cd10f9aRussell King goto disable; 20520877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20530877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 20540877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (!dev->bar) 20550877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto disable; 20560e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch if (readl(&dev->bar->csts) == -1) { 20570e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch result = -ENODEV; 20580e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch goto unmap; 20590e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch } 2060b80d5ccca3a012e91ca64a2a0b13049163a6a698Haiyan Hu dev->db_stride = 1 << NVME_CAP_STRIDE(readq(&dev->bar->cap)); 20610877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->dbs = ((void __iomem *)dev->bar) + 4096; 20620877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20630877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch return 0; 20640877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20650e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch unmap: 20660e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch iounmap(dev->bar); 20670e53d18051725da46cbccfb7874a6422d4d4f274Keith Busch dev->bar = NULL; 20680877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch disable: 20690877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_release_regions(pdev); 20700877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch disable_pci: 20710877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_device(pdev); 20720877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch return result; 20730877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch} 20740877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20750877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Buschstatic void nvme_dev_unmap(struct nvme_dev *dev) 20760877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch{ 20770877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (dev->pci_dev->msi_enabled) 20780877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_msi(dev->pci_dev); 20790877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch else if (dev->pci_dev->msix_enabled) 20800877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_msix(dev->pci_dev); 20810877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20820877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (dev->bar) { 20830877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch iounmap(dev->bar); 20840877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch dev->bar = NULL; 20859a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_release_regions(dev->pci_dev); 20860877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch } 20870877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 20880877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch if (pci_is_enabled(dev->pci_dev)) 20890877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch pci_disable_device(dev->pci_dev); 20900877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch} 20910877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch 2092f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Buschstatic void nvme_dev_shutdown(struct nvme_dev *dev) 2093b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2094224042742582c9938788b81165180c876e997a07Keith Busch int i; 2095224042742582c9938788b81165180c876e997a07Keith Busch 2096d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized = 0; 2097224042742582c9938788b81165180c876e997a07Keith Busch for (i = dev->queue_count - 1; i >= 0; i--) 2098224042742582c9938788b81165180c876e997a07Keith Busch nvme_disable_queue(dev, i); 2099b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 21001fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 2101f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch list_del_init(&dev->node); 21021fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 21031fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 21041894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch if (dev->bar) 21051894d8f16afe5ad54b732f0fa6c4e80bd4d40b91Keith Busch nvme_shutdown_ctrl(dev); 2106f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_dev_unmap(dev); 2107f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch} 2108f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2109f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Buschstatic void nvme_dev_remove(struct nvme_dev *dev) 2110f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch{ 2111f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch struct nvme_ns *ns, *next; 2112f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2113b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 2114b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_del(&ns->list); 2115b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox del_gendisk(ns->disk); 2116b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_ns_free(ns); 2117b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 2118b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2119b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2120091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic int nvme_setup_prp_pools(struct nvme_dev *dev) 2121091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 2122091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 2123091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dev->prp_page_pool = dma_pool_create("prp list page", dmadev, 2124091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox PAGE_SIZE, PAGE_SIZE, 0); 2125091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (!dev->prp_page_pool) 2126091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return -ENOMEM; 2127091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 212899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox /* Optimisation for I/Os between 4k and 128k */ 212999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dev->prp_small_pool = dma_pool_create("prp list 256", dmadev, 213099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 256, 256, 0); 213199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (!dev->prp_small_pool) { 213299802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 213399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox return -ENOMEM; 213499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 2135091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return 0; 2136091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 2137091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2138091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic void nvme_release_prp_pools(struct nvme_dev *dev) 2139091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 2140091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 214199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_small_pool); 2142091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 2143091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2144cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic DEFINE_IDA(nvme_instance_ida); 2145cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2146cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic int nvme_set_instance(struct nvme_dev *dev) 2147b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2148cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh int instance, error; 2149cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2150cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh do { 2151cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) 2152cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 2153cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2154cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 2155cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh error = ida_get_new(&nvme_instance_ida, &instance); 2156cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 2157cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh } while (error == -EAGAIN); 2158cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2159cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (error) 2160cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 2161cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 2162cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh dev->instance = instance; 2163cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return 0; 2164b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2165b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2166b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_release_instance(struct nvme_dev *dev) 2167b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2168cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 2169cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh ida_remove(&nvme_instance_ida, dev->instance); 2170cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 2171b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2172b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 21735e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic void nvme_free_dev(struct kref *kref) 21745e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 21755e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref); 21765e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->queues); 21775e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->entry); 21785e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev); 21795e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 21805e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 21815e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_open(struct inode *inode, struct file *f) 21825e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 21835e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(f->private_data, struct nvme_dev, 21845e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch miscdev); 21855e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_get(&dev->kref); 21865e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch f->private_data = dev; 21875e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 21885e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 21895e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 21905e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_release(struct inode *inode, struct file *f) 21915e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 21925e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 21935e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 21945e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 21955e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 21965e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 21975e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg) 21985e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 21995e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 22005e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch switch (cmd) { 22015e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch case NVME_IOCTL_ADMIN_CMD: 22025e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return nvme_user_admin_cmd(dev, (void __user *)arg); 22035e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch default: 22045e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return -ENOTTY; 22055e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch } 22065e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 22075e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 22085e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic const struct file_operations nvme_dev_fops = { 22095e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .owner = THIS_MODULE, 22105e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .open = nvme_dev_open, 22115e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .release = nvme_dev_release, 22125e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .unlocked_ioctl = nvme_dev_ioctl, 22135e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .compat_ioctl = nvme_dev_ioctl, 22145e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch}; 22155e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 2216f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Buschstatic int nvme_dev_start(struct nvme_dev *dev) 2217f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch{ 2218f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch int result; 2219f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2220f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_dev_map(dev); 2221f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch if (result) 2222f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch return result; 2223f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2224f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_configure_admin_queue(dev); 2225f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch if (result) 2226f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch goto unmap; 2227f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2228f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_lock(&dev_list_lock); 2229f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch list_add(&dev->node, &dev_list); 2230f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_unlock(&dev_list_lock); 2231f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2232f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_setup_io_queues(dev); 2233d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result && result != -EBUSY) 2234f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch goto disable; 2235f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2236d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch return result; 2237f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 2238f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch disable: 2239f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_lock(&dev_list_lock); 2240f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch list_del_init(&dev->node); 2241f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch spin_unlock(&dev_list_lock); 2242f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch unmap: 2243f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_dev_unmap(dev); 2244f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch return result; 2245f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch} 2246f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch 22479a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic int nvme_remove_dead_ctrl(void *arg) 22489a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 22499a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct nvme_dev *dev = (struct nvme_dev *)arg; 22509a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct pci_dev *pdev = dev->pci_dev; 22519a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 22529a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (pci_get_drvdata(pdev)) 22539a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_stop_and_remove_bus_device(pdev); 22549a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kref_put(&dev->kref, nvme_free_dev); 22559a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return 0; 22569a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 22579a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 22589a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic void nvme_remove_disks(struct work_struct *ws) 22599a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 22609a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch int i; 22619a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); 22629a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 22639a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_remove(dev); 22649a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_lock(&dev_list_lock); 22659a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch for (i = dev->queue_count - 1; i > 0; i--) { 22669a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch BUG_ON(!dev->queues[i] || !dev->queues[i]->q_suspended); 22679a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_free_queue(dev->queues[i]); 22689a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev->queue_count--; 22699a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev->queues[i] = NULL; 22709a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 22719a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_unlock(&dev_list_lock); 22729a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 22739a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 22749a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic int nvme_dev_resume(struct nvme_dev *dev) 22759a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 22769a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch int ret; 22779a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 22789a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch ret = nvme_dev_start(dev); 22799a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (ret && ret != -EBUSY) 22809a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return ret; 22819a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (ret == -EBUSY) { 22829a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_lock(&dev_list_lock); 22839a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch INIT_WORK(&dev->reset_work, nvme_remove_disks); 22849a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch queue_work(nvme_workq, &dev->reset_work); 22859a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_unlock(&dev_list_lock); 22869a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 2287d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized = 1; 22889a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return 0; 22899a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 22909a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 22919a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic void nvme_dev_reset(struct nvme_dev *dev) 22929a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 22939a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_shutdown(dev); 22949a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (nvme_dev_resume(dev)) { 22959a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev_err(&dev->pci_dev->dev, "Device failed to resume\n"); 22969a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kref_get(&dev->kref); 22979a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (IS_ERR(kthread_run(nvme_remove_dead_ctrl, dev, "nvme%d", 22989a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev->instance))) { 22999a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch dev_err(&dev->pci_dev->dev, 23009a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch "Failed to start controller remove task\n"); 23019a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kref_put(&dev->kref, nvme_free_dev); 23029a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 23039a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 23049a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 23059a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 23069a6b94584de1a0467d85b435df9c744c5c45a270Keith Buschstatic void nvme_reset_failed_dev(struct work_struct *ws) 23079a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch{ 23089a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); 23099a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_reset(dev); 23109a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch} 23119a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 23128d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) 2313b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 23140877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch int result = -ENOMEM; 2315b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev; 2316b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2317b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev = kzalloc(sizeof(*dev), GFP_KERNEL); 2318b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev) 2319b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOMEM; 2320b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->entry = kcalloc(num_possible_cpus(), sizeof(*dev->entry), 2321b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 2322b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->entry) 2323b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 23241b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queues = kcalloc(num_possible_cpus() + 1, sizeof(void *), 23251b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox GFP_KERNEL); 2326b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->queues) 2327b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 2328b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2329b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox INIT_LIST_HEAD(&dev->namespaces); 2330b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->pci_dev = pdev; 23319a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_set_drvdata(pdev, dev); 2332cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh result = nvme_set_instance(dev); 2333cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (result) 23340877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto free; 2335b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2336091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox result = nvme_setup_prp_pools(dev); 2337091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (result) 23380877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto release; 2339091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2340f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch result = nvme_dev_start(dev); 2341d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result) { 2342d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result == -EBUSY) 2343d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch goto create_cdev; 23440877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch goto release_pools; 2345d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch } 2346b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2347740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox result = nvme_dev_add(dev); 2348d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch if (result) 2349f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch goto shutdown; 2350740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 2351d82e8bfdef9afae83b894be49af4644d9ac3c359Keith Busch create_cdev: 23525e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch scnprintf(dev->name, sizeof(dev->name), "nvme%d", dev->instance); 23535e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.minor = MISC_DYNAMIC_MINOR; 23545e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.parent = &pdev->dev; 23555e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.name = dev->name; 23565e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.fops = &nvme_dev_fops; 23575e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch result = misc_register(&dev->miscdev); 23585e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch if (result) 23595e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch goto remove; 23605e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 2361d4b4ff8e28b474fac0fbfa9cfc40f88b9e41e380Keith Busch dev->initialized = 1; 23625e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_init(&dev->kref); 2363b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 2364b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 23655e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch remove: 23665e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_dev_remove(dev); 2367f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch shutdown: 2368f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_dev_shutdown(dev); 23690877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch release_pools: 2370f0b50732a979c55c2d15fe8ec4503fa5b3260c53Keith Busch nvme_free_queues(dev); 2371091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 23720877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch release: 23730877cb0d285c7f1d53d0b84b360bdea4be4f3f59Keith Busch nvme_release_instance(dev); 2374b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free: 2375b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 2376b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 2377b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 2378b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 2379b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2380b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 23818d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic void nvme_remove(struct pci_dev *pdev) 2382b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2383b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev = pci_get_drvdata(pdev); 23849a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 23859a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_lock(&dev_list_lock); 23869a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch list_del_init(&dev->node); 23879a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch spin_unlock(&dev_list_lock); 23889a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 23899a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch pci_set_drvdata(pdev, NULL); 23909a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch flush_work(&dev->reset_work); 23915e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch misc_deregister(&dev->miscdev); 23929a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_remove(dev); 23939a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_dev_shutdown(dev); 23949a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_free_queues(dev); 23959a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_release_instance(dev); 23969a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_release_prp_pools(dev); 23975e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 2398b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2399b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2400b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* These functions are yet to be implemented */ 2401b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_detected NULL 2402b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_dump_registers NULL 2403b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_link_reset NULL 2404b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_slot_reset NULL 2405b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_resume NULL 2406cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2407cd63894630ab17a192bf97427d16dbec10710a6aKeith Buschstatic int nvme_suspend(struct device *dev) 2408cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch{ 2409cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct pci_dev *pdev = to_pci_dev(dev); 2410cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct nvme_dev *ndev = pci_get_drvdata(pdev); 2411cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2412cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch nvme_dev_shutdown(ndev); 2413cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch return 0; 2414cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch} 2415cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2416cd63894630ab17a192bf97427d16dbec10710a6aKeith Buschstatic int nvme_resume(struct device *dev) 2417cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch{ 2418cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct pci_dev *pdev = to_pci_dev(dev); 2419cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch struct nvme_dev *ndev = pci_get_drvdata(pdev); 2420cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 24219a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (nvme_dev_resume(ndev) && !work_busy(&ndev->reset_work)) { 24229a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch INIT_WORK(&ndev->reset_work, nvme_reset_failed_dev); 24239a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch queue_work(nvme_workq, &ndev->reset_work); 24249a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch } 24259a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch return 0; 2426cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch} 2427cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch 2428cd63894630ab17a192bf97427d16dbec10710a6aKeith Buschstatic SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume); 2429b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 24301d3520357df99baf4ad89f86268ac96cd38092d9Stephen Hemmingerstatic const struct pci_error_handlers nvme_err_handler = { 2431b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .error_detected = nvme_error_detected, 2432b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .mmio_enabled = nvme_dump_registers, 2433b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .link_reset = nvme_link_reset, 2434b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .slot_reset = nvme_slot_reset, 2435b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_error_resume, 2436b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2437b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2438b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* Move to pci_ids.h later */ 2439b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define PCI_CLASS_STORAGE_EXPRESS 0x010802 2440b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2441b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic DEFINE_PCI_DEVICE_TABLE(nvme_id_table) = { 2442b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 2443b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { 0, } 2444b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2445b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_DEVICE_TABLE(pci, nvme_id_table); 2446b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2447b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct pci_driver nvme_driver = { 2448b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .name = "nvme", 2449b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .id_table = nvme_id_table, 2450b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .probe = nvme_probe, 24518d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartman .remove = nvme_remove, 2452cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch .driver = { 2453cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch .pm = &nvme_dev_pm_ops, 2454cd63894630ab17a192bf97427d16dbec10710a6aKeith Busch }, 2455b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .err_handler = &nvme_err_handler, 2456b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2457b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2458b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __init nvme_init(void) 2459b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 24600ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox int result; 24611fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 24621fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 24631fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (IS_ERR(nvme_thread)) 24641fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return PTR_ERR(nvme_thread); 2465b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 24669a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch result = -ENOMEM; 24679a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch nvme_workq = create_singlethread_workqueue("nvme"); 24689a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch if (!nvme_workq) 24699a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch goto kill_kthread; 24709a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch 24715c42ea1643a630060f9e71e06d3933d244970967Keith Busch result = register_blkdev(nvme_major, "nvme"); 24725c42ea1643a630060f9e71e06d3933d244970967Keith Busch if (result < 0) 24739a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch goto kill_workq; 24745c42ea1643a630060f9e71e06d3933d244970967Keith Busch else if (result > 0) 24750ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox nvme_major = result; 2476b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2477b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = pci_register_driver(&nvme_driver); 24781fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (result) 24791fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto unregister_blkdev; 24801fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 2481b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 24821fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox unregister_blkdev: 2483b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 24849a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch kill_workq: 24859a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch destroy_workqueue(nvme_workq); 24861fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kill_kthread: 24871fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 2488b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 2489b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2490b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2491b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __exit nvme_exit(void) 2492b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2493b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_unregister_driver(&nvme_driver); 2494b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 24959a6b94584de1a0467d85b435df9c744c5c45a270Keith Busch destroy_workqueue(nvme_workq); 24961fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 2497b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2498b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2499b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 2500b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_LICENSE("GPL"); 2501366e8217e5ec6ce9f73aec19c46d983110fb4a98Matthew WilcoxMODULE_VERSION("0.8"); 2502b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_init(nvme_init); 2503b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_exit(nvme_exit); 2504