Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1 | /* |
| 2 | * NVM Express device driver |
Matthew Wilcox | 6eb0d69 | 2014-03-24 10:11:22 -0400 | [diff] [blame] | 3 | * Copyright (c) 2011-2014, Intel Corporation. |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms and conditions of the GNU General Public License, |
| 7 | * version 2, as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 13 | */ |
| 14 | |
| 15 | #include <linux/nvme.h> |
Matthew Wilcox | 8de0553 | 2011-05-12 13:50:28 -0400 | [diff] [blame] | 16 | #include <linux/bitops.h> |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 17 | #include <linux/blkdev.h> |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 18 | #include <linux/blk-mq.h> |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 19 | #include <linux/cpu.h> |
Matthew Wilcox | fd63e9ce | 2011-05-06 08:37:54 -0400 | [diff] [blame] | 20 | #include <linux/delay.h> |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 21 | #include <linux/errno.h> |
| 22 | #include <linux/fs.h> |
| 23 | #include <linux/genhd.h> |
Keith Busch | 4cc09e2 | 2014-04-02 15:45:37 -0600 | [diff] [blame] | 24 | #include <linux/hdreg.h> |
Matthew Wilcox | 5aff938 | 2011-05-06 08:45:47 -0400 | [diff] [blame] | 25 | #include <linux/idr.h> |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 26 | #include <linux/init.h> |
| 27 | #include <linux/interrupt.h> |
| 28 | #include <linux/io.h> |
| 29 | #include <linux/kdev_t.h> |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 30 | #include <linux/kthread.h> |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 31 | #include <linux/kernel.h> |
| 32 | #include <linux/mm.h> |
| 33 | #include <linux/module.h> |
| 34 | #include <linux/moduleparam.h> |
| 35 | #include <linux/pci.h> |
Matthew Wilcox | be7b627 | 2011-02-06 07:53:23 -0500 | [diff] [blame] | 36 | #include <linux/poison.h> |
Matthew Wilcox | c3bfe71 | 2013-07-08 17:26:25 -0400 | [diff] [blame] | 37 | #include <linux/ptrace.h> |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 38 | #include <linux/sched.h> |
| 39 | #include <linux/slab.h> |
| 40 | #include <linux/types.h> |
Vishal Verma | 5d0f613 | 2013-03-04 18:40:58 -0700 | [diff] [blame] | 41 | #include <scsi/sg.h> |
Hitoshi Mitake | 797a796 | 2012-02-07 11:45:33 +0900 | [diff] [blame] | 42 | #include <asm-generic/io-64-nonatomic-lo-hi.h> |
| 43 | |
Keith Busch | 9d43cf6 | 2014-05-13 11:42:02 -0600 | [diff] [blame] | 44 | #define NVME_Q_DEPTH 1024 |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 45 | #define NVME_AQ_DEPTH 64 |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 46 | #define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) |
| 47 | #define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) |
Keith Busch | 9d43cf6 | 2014-05-13 11:42:02 -0600 | [diff] [blame] | 48 | #define ADMIN_TIMEOUT (admin_timeout * HZ) |
Dan McLeran | 2484f40 | 2014-07-01 09:33:32 -0600 | [diff] [blame] | 49 | #define SHUTDOWN_TIMEOUT (shutdown_timeout * HZ) |
Keith Busch | 9d43cf6 | 2014-05-13 11:42:02 -0600 | [diff] [blame] | 50 | #define IOD_TIMEOUT (retry_time * HZ) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 51 | |
Keith Busch | 9d43cf6 | 2014-05-13 11:42:02 -0600 | [diff] [blame] | 52 | static unsigned char admin_timeout = 60; |
| 53 | module_param(admin_timeout, byte, 0644); |
| 54 | MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands"); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 55 | |
Matthew Wilcox | bd67608 | 2014-06-03 23:04:30 -0400 | [diff] [blame] | 56 | unsigned char nvme_io_timeout = 30; |
| 57 | module_param_named(io_timeout, nvme_io_timeout, byte, 0644); |
Keith Busch | b355084 | 2014-04-04 11:43:36 -0600 | [diff] [blame] | 58 | MODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O"); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 59 | |
Keith Busch | 61e4ce0 | 2014-05-13 11:42:01 -0600 | [diff] [blame] | 60 | static unsigned char retry_time = 30; |
| 61 | module_param(retry_time, byte, 0644); |
| 62 | MODULE_PARM_DESC(retry_time, "time in seconds to retry failed I/O"); |
| 63 | |
Dan McLeran | 2484f40 | 2014-07-01 09:33:32 -0600 | [diff] [blame] | 64 | static unsigned char shutdown_timeout = 5; |
| 65 | module_param(shutdown_timeout, byte, 0644); |
| 66 | MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown"); |
| 67 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 68 | static int nvme_major; |
| 69 | module_param(nvme_major, int, 0); |
| 70 | |
Matthew Wilcox | 58ffacb | 2011-02-06 07:28:06 -0500 | [diff] [blame] | 71 | static int use_threaded_interrupts; |
| 72 | module_param(use_threaded_interrupts, int, 0); |
| 73 | |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 74 | static DEFINE_SPINLOCK(dev_list_lock); |
| 75 | static LIST_HEAD(dev_list); |
| 76 | static struct task_struct *nvme_thread; |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 77 | static struct workqueue_struct *nvme_workq; |
Dan McLeran | b9afca3 | 2014-04-07 17:10:11 -0600 | [diff] [blame] | 78 | static wait_queue_head_t nvme_kthread_wait; |
Keith Busch | f3db22f | 2014-06-11 11:51:35 -0600 | [diff] [blame] | 79 | static struct notifier_block nvme_nb; |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 80 | |
Keith Busch | d4b4ff8 | 2013-12-10 13:10:37 -0700 | [diff] [blame] | 81 | static void nvme_reset_failed_dev(struct work_struct *ws); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 82 | static int nvme_process_cq(struct nvme_queue *nvmeq); |
Keith Busch | d4b4ff8 | 2013-12-10 13:10:37 -0700 | [diff] [blame] | 83 | |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 84 | struct async_cmd_info { |
| 85 | struct kthread_work work; |
| 86 | struct kthread_worker *worker; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 87 | struct request *req; |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 88 | u32 result; |
| 89 | int status; |
| 90 | void *ctx; |
| 91 | }; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 92 | |
| 93 | /* |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 94 | * An NVM Express queue. Each device has at least two (one for admin |
| 95 | * commands and one for I/O commands). |
| 96 | */ |
| 97 | struct nvme_queue { |
Keith Busch | f435c28 | 2014-07-07 09:14:42 -0600 | [diff] [blame] | 98 | struct llist_node node; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 99 | struct device *q_dmadev; |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 100 | struct nvme_dev *dev; |
Matthew Wilcox | 3193f07 | 2014-01-27 15:57:22 -0500 | [diff] [blame] | 101 | char irqname[24]; /* nvme4294967295-65535\0 */ |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 102 | spinlock_t q_lock; |
| 103 | struct nvme_command *sq_cmds; |
| 104 | volatile struct nvme_completion *cqes; |
| 105 | dma_addr_t sq_dma_addr; |
| 106 | dma_addr_t cq_dma_addr; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 107 | u32 __iomem *q_db; |
| 108 | u16 q_depth; |
Jens Axboe | 6222d17 | 2015-01-15 15:19:10 -0700 | [diff] [blame] | 109 | s16 cq_vector; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 110 | u16 sq_head; |
| 111 | u16 sq_tail; |
| 112 | u16 cq_head; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 113 | u16 qid; |
Matthew Wilcox | e9539f4 | 2013-06-24 11:47:34 -0400 | [diff] [blame] | 114 | u8 cq_phase; |
| 115 | u8 cqe_seen; |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 116 | struct async_cmd_info cmdinfo; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 117 | struct blk_mq_hw_ctx *hctx; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 118 | }; |
| 119 | |
| 120 | /* |
| 121 | * Check we didin't inadvertently grow the command struct |
| 122 | */ |
| 123 | static inline void _nvme_check_size(void) |
| 124 | { |
| 125 | BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); |
| 126 | BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); |
| 127 | BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); |
| 128 | BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); |
| 129 | BUILD_BUG_ON(sizeof(struct nvme_features) != 64); |
Vishal Verma | f8ebf84 | 2013-03-27 07:13:41 -0400 | [diff] [blame] | 130 | BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 131 | BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 132 | BUILD_BUG_ON(sizeof(struct nvme_command) != 64); |
| 133 | BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); |
| 134 | BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); |
| 135 | BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); |
Keith Busch | 6ecec74 | 2012-09-26 12:49:27 -0600 | [diff] [blame] | 136 | BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 137 | } |
| 138 | |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 139 | typedef void (*nvme_completion_fn)(struct nvme_queue *, void *, |
Matthew Wilcox | c2f5b65 | 2011-10-15 07:33:46 -0400 | [diff] [blame] | 140 | struct nvme_completion *); |
| 141 | |
Matthew Wilcox | e85248e | 2011-02-06 18:30:16 -0500 | [diff] [blame] | 142 | struct nvme_cmd_info { |
Matthew Wilcox | c2f5b65 | 2011-10-15 07:33:46 -0400 | [diff] [blame] | 143 | nvme_completion_fn fn; |
| 144 | void *ctx; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 145 | int aborted; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 146 | struct nvme_queue *nvmeq; |
Matthew Wilcox | e85248e | 2011-02-06 18:30:16 -0500 | [diff] [blame] | 147 | }; |
| 148 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 149 | static int nvme_admin_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, |
| 150 | unsigned int hctx_idx) |
Matthew Wilcox | e85248e | 2011-02-06 18:30:16 -0500 | [diff] [blame] | 151 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 152 | struct nvme_dev *dev = data; |
| 153 | struct nvme_queue *nvmeq = dev->queues[0]; |
| 154 | |
| 155 | WARN_ON(nvmeq->hctx); |
| 156 | nvmeq->hctx = hctx; |
| 157 | hctx->driver_data = nvmeq; |
| 158 | return 0; |
Matthew Wilcox | e85248e | 2011-02-06 18:30:16 -0500 | [diff] [blame] | 159 | } |
| 160 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 161 | static int nvme_admin_init_request(void *data, struct request *req, |
| 162 | unsigned int hctx_idx, unsigned int rq_idx, |
| 163 | unsigned int numa_node) |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 164 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 165 | struct nvme_dev *dev = data; |
| 166 | struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); |
| 167 | struct nvme_queue *nvmeq = dev->queues[0]; |
| 168 | |
| 169 | BUG_ON(!nvmeq); |
| 170 | cmd->nvmeq = nvmeq; |
| 171 | return 0; |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 172 | } |
| 173 | |
Jens Axboe | 2c30540 | 2014-11-14 09:47:32 -0700 | [diff] [blame] | 174 | static void nvme_exit_hctx(struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx) |
| 175 | { |
| 176 | struct nvme_queue *nvmeq = hctx->driver_data; |
| 177 | |
| 178 | nvmeq->hctx = NULL; |
| 179 | } |
| 180 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 181 | static int nvme_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, |
| 182 | unsigned int hctx_idx) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 183 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 184 | struct nvme_dev *dev = data; |
| 185 | struct nvme_queue *nvmeq = dev->queues[ |
| 186 | (hctx_idx % dev->queue_count) + 1]; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 187 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 188 | if (!nvmeq->hctx) |
| 189 | nvmeq->hctx = hctx; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 190 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 191 | /* nvmeq queues are shared between namespaces. We assume here that |
| 192 | * blk-mq map the tags so they match up with the nvme queue tags. */ |
| 193 | WARN_ON(nvmeq->hctx->tags != hctx->tags); |
| 194 | |
| 195 | hctx->driver_data = nvmeq; |
| 196 | return 0; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 197 | } |
| 198 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 199 | static int nvme_init_request(void *data, struct request *req, |
| 200 | unsigned int hctx_idx, unsigned int rq_idx, |
| 201 | unsigned int numa_node) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 202 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 203 | struct nvme_dev *dev = data; |
| 204 | struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); |
| 205 | struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; |
| 206 | |
| 207 | BUG_ON(!nvmeq); |
| 208 | cmd->nvmeq = nvmeq; |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | static void nvme_set_info(struct nvme_cmd_info *cmd, void *ctx, |
| 213 | nvme_completion_fn handler) |
| 214 | { |
| 215 | cmd->fn = handler; |
| 216 | cmd->ctx = ctx; |
| 217 | cmd->aborted = 0; |
Keith Busch | c917dfe | 2015-01-07 18:55:48 -0700 | [diff] [blame] | 218 | blk_mq_start_request(blk_mq_rq_from_pdu(cmd)); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 219 | } |
| 220 | |
Matthew Wilcox | c2f5b65 | 2011-10-15 07:33:46 -0400 | [diff] [blame] | 221 | /* Special values must be less than 0x1000 */ |
| 222 | #define CMD_CTX_BASE ((void *)POISON_POINTER_DELTA) |
Matthew Wilcox | d2d8703 | 2011-02-07 15:55:59 -0500 | [diff] [blame] | 223 | #define CMD_CTX_CANCELLED (0x30C + CMD_CTX_BASE) |
| 224 | #define CMD_CTX_COMPLETED (0x310 + CMD_CTX_BASE) |
| 225 | #define CMD_CTX_INVALID (0x314 + CMD_CTX_BASE) |
Matthew Wilcox | be7b627 | 2011-02-06 07:53:23 -0500 | [diff] [blame] | 226 | |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 227 | static void special_completion(struct nvme_queue *nvmeq, void *ctx, |
Matthew Wilcox | c2f5b65 | 2011-10-15 07:33:46 -0400 | [diff] [blame] | 228 | struct nvme_completion *cqe) |
| 229 | { |
| 230 | if (ctx == CMD_CTX_CANCELLED) |
| 231 | return; |
Matthew Wilcox | c2f5b65 | 2011-10-15 07:33:46 -0400 | [diff] [blame] | 232 | if (ctx == CMD_CTX_COMPLETED) { |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 233 | dev_warn(nvmeq->q_dmadev, |
Matthew Wilcox | c2f5b65 | 2011-10-15 07:33:46 -0400 | [diff] [blame] | 234 | "completed id %d twice on queue %d\n", |
| 235 | cqe->command_id, le16_to_cpup(&cqe->sq_id)); |
| 236 | return; |
| 237 | } |
| 238 | if (ctx == CMD_CTX_INVALID) { |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 239 | dev_warn(nvmeq->q_dmadev, |
Matthew Wilcox | c2f5b65 | 2011-10-15 07:33:46 -0400 | [diff] [blame] | 240 | "invalid id %d completed on queue %d\n", |
| 241 | cqe->command_id, le16_to_cpup(&cqe->sq_id)); |
| 242 | return; |
| 243 | } |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 244 | dev_warn(nvmeq->q_dmadev, "Unknown special completion %p\n", ctx); |
Matthew Wilcox | c2f5b65 | 2011-10-15 07:33:46 -0400 | [diff] [blame] | 245 | } |
| 246 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 247 | static void *cancel_cmd_info(struct nvme_cmd_info *cmd, nvme_completion_fn *fn) |
| 248 | { |
| 249 | void *ctx; |
| 250 | |
| 251 | if (fn) |
| 252 | *fn = cmd->fn; |
| 253 | ctx = cmd->ctx; |
| 254 | cmd->fn = special_completion; |
| 255 | cmd->ctx = CMD_CTX_CANCELLED; |
| 256 | return ctx; |
| 257 | } |
| 258 | |
| 259 | static void async_req_completion(struct nvme_queue *nvmeq, void *ctx, |
| 260 | struct nvme_completion *cqe) |
| 261 | { |
| 262 | struct request *req = ctx; |
| 263 | |
| 264 | u32 result = le32_to_cpup(&cqe->result); |
| 265 | u16 status = le16_to_cpup(&cqe->status) >> 1; |
| 266 | |
| 267 | if (status == NVME_SC_SUCCESS || status == NVME_SC_ABORT_REQ) |
| 268 | ++nvmeq->dev->event_limit; |
| 269 | if (status == NVME_SC_SUCCESS) |
| 270 | dev_warn(nvmeq->q_dmadev, |
| 271 | "async event result %08x\n", result); |
| 272 | |
Jens Axboe | 9d135bb | 2014-11-17 10:43:42 -0700 | [diff] [blame] | 273 | blk_mq_free_hctx_request(nvmeq->hctx, req); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | static void abort_completion(struct nvme_queue *nvmeq, void *ctx, |
| 277 | struct nvme_completion *cqe) |
| 278 | { |
| 279 | struct request *req = ctx; |
| 280 | |
| 281 | u16 status = le16_to_cpup(&cqe->status) >> 1; |
| 282 | u32 result = le32_to_cpup(&cqe->result); |
| 283 | |
Jens Axboe | 9d135bb | 2014-11-17 10:43:42 -0700 | [diff] [blame] | 284 | blk_mq_free_hctx_request(nvmeq->hctx, req); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 285 | |
| 286 | dev_warn(nvmeq->q_dmadev, "Abort status:%x result:%x", status, result); |
| 287 | ++nvmeq->dev->abort_limit; |
| 288 | } |
| 289 | |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 290 | static void async_completion(struct nvme_queue *nvmeq, void *ctx, |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 291 | struct nvme_completion *cqe) |
| 292 | { |
| 293 | struct async_cmd_info *cmdinfo = ctx; |
| 294 | cmdinfo->result = le32_to_cpup(&cqe->result); |
| 295 | cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; |
| 296 | queue_kthread_work(cmdinfo->worker, &cmdinfo->work); |
Jens Axboe | 9d135bb | 2014-11-17 10:43:42 -0700 | [diff] [blame] | 297 | blk_mq_free_hctx_request(nvmeq->hctx, cmdinfo->req); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | static inline struct nvme_cmd_info *get_cmd_from_tag(struct nvme_queue *nvmeq, |
| 301 | unsigned int tag) |
| 302 | { |
| 303 | struct blk_mq_hw_ctx *hctx = nvmeq->hctx; |
| 304 | struct request *req = blk_mq_tag_to_rq(hctx->tags, tag); |
| 305 | |
| 306 | return blk_mq_rq_to_pdu(req); |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 307 | } |
| 308 | |
Matthew Wilcox | 184d294 | 2011-05-11 21:36:38 -0400 | [diff] [blame] | 309 | /* |
| 310 | * Called with local interrupts disabled and the q_lock held. May not sleep. |
| 311 | */ |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 312 | static void *nvme_finish_cmd(struct nvme_queue *nvmeq, int tag, |
Matthew Wilcox | c2f5b65 | 2011-10-15 07:33:46 -0400 | [diff] [blame] | 313 | nvme_completion_fn *fn) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 314 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 315 | struct nvme_cmd_info *cmd = get_cmd_from_tag(nvmeq, tag); |
Matthew Wilcox | c2f5b65 | 2011-10-15 07:33:46 -0400 | [diff] [blame] | 316 | void *ctx; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 317 | if (tag >= nvmeq->q_depth) { |
| 318 | *fn = special_completion; |
Matthew Wilcox | 48e3d39 | 2011-02-06 08:51:15 -0500 | [diff] [blame] | 319 | return CMD_CTX_INVALID; |
Matthew Wilcox | c2f5b65 | 2011-10-15 07:33:46 -0400 | [diff] [blame] | 320 | } |
Keith Busch | 859361a | 2012-08-02 14:05:59 -0600 | [diff] [blame] | 321 | if (fn) |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 322 | *fn = cmd->fn; |
| 323 | ctx = cmd->ctx; |
| 324 | cmd->fn = special_completion; |
| 325 | cmd->ctx = CMD_CTX_COMPLETED; |
Matthew Wilcox | c2f5b65 | 2011-10-15 07:33:46 -0400 | [diff] [blame] | 326 | return ctx; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 327 | } |
| 328 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 329 | /** |
Matthew Wilcox | 714a7a2 | 2011-03-16 16:28:24 -0400 | [diff] [blame] | 330 | * nvme_submit_cmd() - Copy a command into a queue and ring the doorbell |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 331 | * @nvmeq: The queue to use |
| 332 | * @cmd: The command to send |
| 333 | * |
| 334 | * Safe to use from interrupt context |
| 335 | */ |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 336 | static int __nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 337 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 338 | u16 tail = nvmeq->sq_tail; |
| 339 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 340 | memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 341 | if (++tail == nvmeq->q_depth) |
| 342 | tail = 0; |
Matthew Wilcox | 7547881 | 2011-02-16 09:59:59 -0500 | [diff] [blame] | 343 | writel(tail, nvmeq->q_db); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 344 | nvmeq->sq_tail = tail; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 345 | |
| 346 | return 0; |
| 347 | } |
| 348 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 349 | static int nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) |
| 350 | { |
| 351 | unsigned long flags; |
| 352 | int ret; |
| 353 | spin_lock_irqsave(&nvmeq->q_lock, flags); |
| 354 | ret = __nvme_submit_cmd(nvmeq, cmd); |
| 355 | spin_unlock_irqrestore(&nvmeq->q_lock, flags); |
| 356 | return ret; |
| 357 | } |
| 358 | |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 359 | static __le64 **iod_list(struct nvme_iod *iod) |
| 360 | { |
| 361 | return ((void *)iod) + iod->offset; |
| 362 | } |
| 363 | |
| 364 | /* |
| 365 | * Will slightly overestimate the number of pages needed. This is OK |
| 366 | * as it only leads to a small amount of wasted memory for the lifetime of |
| 367 | * the I/O. |
| 368 | */ |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 369 | static int nvme_npages(unsigned size, struct nvme_dev *dev) |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 370 | { |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 371 | unsigned nprps = DIV_ROUND_UP(size + dev->page_size, dev->page_size); |
| 372 | return DIV_ROUND_UP(8 * nprps, dev->page_size - 8); |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 373 | } |
| 374 | |
| 375 | static struct nvme_iod * |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 376 | nvme_alloc_iod(unsigned nseg, unsigned nbytes, struct nvme_dev *dev, gfp_t gfp) |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 377 | { |
| 378 | struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 379 | sizeof(__le64 *) * nvme_npages(nbytes, dev) + |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 380 | sizeof(struct scatterlist) * nseg, gfp); |
| 381 | |
| 382 | if (iod) { |
| 383 | iod->offset = offsetof(struct nvme_iod, sg[nseg]); |
| 384 | iod->npages = -1; |
| 385 | iod->length = nbytes; |
Keith Busch | 2b19603 | 2012-11-06 11:59:23 -0700 | [diff] [blame] | 386 | iod->nents = 0; |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 387 | iod->first_dma = 0ULL; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 388 | } |
| 389 | |
| 390 | return iod; |
| 391 | } |
| 392 | |
Vishal Verma | 5d0f613 | 2013-03-04 18:40:58 -0700 | [diff] [blame] | 393 | void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 394 | { |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 395 | const int last_prp = dev->page_size / 8 - 1; |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 396 | int i; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 397 | __le64 **list = iod_list(iod); |
| 398 | dma_addr_t prp_dma = iod->first_dma; |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 399 | |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 400 | if (iod->npages == 0) |
| 401 | dma_pool_free(dev->prp_small_pool, list[0], prp_dma); |
| 402 | for (i = 0; i < iod->npages; i++) { |
| 403 | __le64 *prp_list = list[i]; |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 404 | dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 405 | dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 406 | prp_dma = next_prp_dma; |
| 407 | } |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 408 | kfree(iod); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 409 | } |
| 410 | |
Keith Busch | b4ff9c8 | 2014-08-29 09:06:12 -0600 | [diff] [blame] | 411 | static int nvme_error_status(u16 status) |
| 412 | { |
| 413 | switch (status & 0x7ff) { |
| 414 | case NVME_SC_SUCCESS: |
| 415 | return 0; |
| 416 | case NVME_SC_CAP_EXCEEDED: |
| 417 | return -ENOSPC; |
| 418 | default: |
| 419 | return -EIO; |
| 420 | } |
| 421 | } |
| 422 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 423 | static void req_completion(struct nvme_queue *nvmeq, void *ctx, |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 424 | struct nvme_completion *cqe) |
| 425 | { |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 426 | struct nvme_iod *iod = ctx; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 427 | struct request *req = iod->private; |
| 428 | struct nvme_cmd_info *cmd_rq = blk_mq_rq_to_pdu(req); |
| 429 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 430 | u16 status = le16_to_cpup(&cqe->status) >> 1; |
| 431 | |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 432 | if (unlikely(status)) { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 433 | if (!(status & NVME_SC_DNR || blk_noretry_request(req)) |
| 434 | && (jiffies - req->start_time) < req->timeout) { |
Keith Busch | c9d3bf8 | 2015-01-07 18:55:52 -0700 | [diff] [blame] | 435 | unsigned long flags; |
| 436 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 437 | blk_mq_requeue_request(req); |
Keith Busch | c9d3bf8 | 2015-01-07 18:55:52 -0700 | [diff] [blame] | 438 | spin_lock_irqsave(req->q->queue_lock, flags); |
| 439 | if (!blk_queue_stopped(req->q)) |
| 440 | blk_mq_kick_requeue_list(req->q); |
| 441 | spin_unlock_irqrestore(req->q->queue_lock, flags); |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 442 | return; |
| 443 | } |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 444 | req->errors = nvme_error_status(status); |
| 445 | } else |
| 446 | req->errors = 0; |
| 447 | |
| 448 | if (cmd_rq->aborted) |
| 449 | dev_warn(&nvmeq->dev->pci_dev->dev, |
| 450 | "completing aborted command with status:%04x\n", |
| 451 | status); |
| 452 | |
| 453 | if (iod->nents) |
| 454 | dma_unmap_sg(&nvmeq->dev->pci_dev->dev, iod->sg, iod->nents, |
| 455 | rq_data_dir(req) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 456 | nvme_free_iod(nvmeq->dev, iod); |
Keith Busch | 3291fa5 | 2014-04-28 12:30:52 -0600 | [diff] [blame] | 457 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 458 | blk_mq_complete_request(req); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 459 | } |
| 460 | |
Matthew Wilcox | 184d294 | 2011-05-11 21:36:38 -0400 | [diff] [blame] | 461 | /* length is in bytes. gfp flags indicates whether we may sleep. */ |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 462 | int nvme_setup_prps(struct nvme_dev *dev, struct nvme_iod *iod, int total_len, |
| 463 | gfp_t gfp) |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 464 | { |
Matthew Wilcox | 99802a7 | 2011-02-10 10:30:34 -0500 | [diff] [blame] | 465 | struct dma_pool *pool; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 466 | int length = total_len; |
| 467 | struct scatterlist *sg = iod->sg; |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 468 | int dma_len = sg_dma_len(sg); |
| 469 | u64 dma_addr = sg_dma_address(sg); |
| 470 | int offset = offset_in_page(dma_addr); |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 471 | __le64 *prp_list; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 472 | __le64 **list = iod_list(iod); |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 473 | dma_addr_t prp_dma; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 474 | int nprps, i; |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 475 | u32 page_size = dev->page_size; |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 476 | |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 477 | length -= (page_size - offset); |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 478 | if (length <= 0) |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 479 | return total_len; |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 480 | |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 481 | dma_len -= (page_size - offset); |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 482 | if (dma_len) { |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 483 | dma_addr += (page_size - offset); |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 484 | } else { |
| 485 | sg = sg_next(sg); |
| 486 | dma_addr = sg_dma_address(sg); |
| 487 | dma_len = sg_dma_len(sg); |
| 488 | } |
| 489 | |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 490 | if (length <= page_size) { |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 491 | iod->first_dma = dma_addr; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 492 | return total_len; |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 493 | } |
| 494 | |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 495 | nprps = DIV_ROUND_UP(length, page_size); |
Matthew Wilcox | 99802a7 | 2011-02-10 10:30:34 -0500 | [diff] [blame] | 496 | if (nprps <= (256 / 8)) { |
| 497 | pool = dev->prp_small_pool; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 498 | iod->npages = 0; |
Matthew Wilcox | 99802a7 | 2011-02-10 10:30:34 -0500 | [diff] [blame] | 499 | } else { |
| 500 | pool = dev->prp_page_pool; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 501 | iod->npages = 1; |
Matthew Wilcox | 99802a7 | 2011-02-10 10:30:34 -0500 | [diff] [blame] | 502 | } |
| 503 | |
Matthew Wilcox | b77954c | 2011-05-12 13:51:41 -0400 | [diff] [blame] | 504 | prp_list = dma_pool_alloc(pool, gfp, &prp_dma); |
| 505 | if (!prp_list) { |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 506 | iod->first_dma = dma_addr; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 507 | iod->npages = -1; |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 508 | return (total_len - length) + page_size; |
Matthew Wilcox | b77954c | 2011-05-12 13:51:41 -0400 | [diff] [blame] | 509 | } |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 510 | list[0] = prp_list; |
| 511 | iod->first_dma = prp_dma; |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 512 | i = 0; |
| 513 | for (;;) { |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 514 | if (i == page_size >> 3) { |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 515 | __le64 *old_prp_list = prp_list; |
Matthew Wilcox | b77954c | 2011-05-12 13:51:41 -0400 | [diff] [blame] | 516 | prp_list = dma_pool_alloc(pool, gfp, &prp_dma); |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 517 | if (!prp_list) |
| 518 | return total_len - length; |
| 519 | list[iod->npages++] = prp_list; |
Matthew Wilcox | 7523d83 | 2011-03-16 16:43:40 -0400 | [diff] [blame] | 520 | prp_list[0] = old_prp_list[i - 1]; |
| 521 | old_prp_list[i - 1] = cpu_to_le64(prp_dma); |
| 522 | i = 1; |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 523 | } |
| 524 | prp_list[i++] = cpu_to_le64(dma_addr); |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 525 | dma_len -= page_size; |
| 526 | dma_addr += page_size; |
| 527 | length -= page_size; |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 528 | if (length <= 0) |
| 529 | break; |
| 530 | if (dma_len > 0) |
| 531 | continue; |
| 532 | BUG_ON(dma_len < 0); |
| 533 | sg = sg_next(sg); |
| 534 | dma_addr = sg_dma_address(sg); |
| 535 | dma_len = sg_dma_len(sg); |
| 536 | } |
| 537 | |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 538 | return total_len; |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 539 | } |
| 540 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 541 | /* |
| 542 | * We reuse the small pool to allocate the 16-byte range here as it is not |
| 543 | * worth having a special pool for these or additional cases to handle freeing |
| 544 | * the iod. |
| 545 | */ |
| 546 | static void nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, |
| 547 | struct request *req, struct nvme_iod *iod) |
Keith Busch | 0e5e4f0 | 2012-11-09 16:33:05 -0700 | [diff] [blame] | 548 | { |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 549 | struct nvme_dsm_range *range = |
| 550 | (struct nvme_dsm_range *)iod_list(iod)[0]; |
Keith Busch | 0e5e4f0 | 2012-11-09 16:33:05 -0700 | [diff] [blame] | 551 | struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; |
| 552 | |
Keith Busch | 0e5e4f0 | 2012-11-09 16:33:05 -0700 | [diff] [blame] | 553 | range->cattr = cpu_to_le32(0); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 554 | range->nlb = cpu_to_le32(blk_rq_bytes(req) >> ns->lba_shift); |
| 555 | range->slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); |
Keith Busch | 0e5e4f0 | 2012-11-09 16:33:05 -0700 | [diff] [blame] | 556 | |
| 557 | memset(cmnd, 0, sizeof(*cmnd)); |
| 558 | cmnd->dsm.opcode = nvme_cmd_dsm; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 559 | cmnd->dsm.command_id = req->tag; |
Keith Busch | 0e5e4f0 | 2012-11-09 16:33:05 -0700 | [diff] [blame] | 560 | cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); |
| 561 | cmnd->dsm.prp1 = cpu_to_le64(iod->first_dma); |
| 562 | cmnd->dsm.nr = 0; |
| 563 | cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); |
| 564 | |
| 565 | if (++nvmeq->sq_tail == nvmeq->q_depth) |
| 566 | nvmeq->sq_tail = 0; |
| 567 | writel(nvmeq->sq_tail, nvmeq->q_db); |
Keith Busch | 0e5e4f0 | 2012-11-09 16:33:05 -0700 | [diff] [blame] | 568 | } |
| 569 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 570 | static void nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, |
Matthew Wilcox | 00df5cb | 2011-02-22 14:18:30 -0500 | [diff] [blame] | 571 | int cmdid) |
| 572 | { |
| 573 | struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; |
| 574 | |
| 575 | memset(cmnd, 0, sizeof(*cmnd)); |
| 576 | cmnd->common.opcode = nvme_cmd_flush; |
| 577 | cmnd->common.command_id = cmdid; |
| 578 | cmnd->common.nsid = cpu_to_le32(ns->ns_id); |
| 579 | |
| 580 | if (++nvmeq->sq_tail == nvmeq->q_depth) |
| 581 | nvmeq->sq_tail = 0; |
| 582 | writel(nvmeq->sq_tail, nvmeq->q_db); |
Matthew Wilcox | 00df5cb | 2011-02-22 14:18:30 -0500 | [diff] [blame] | 583 | } |
| 584 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 585 | static int nvme_submit_iod(struct nvme_queue *nvmeq, struct nvme_iod *iod, |
| 586 | struct nvme_ns *ns) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 587 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 588 | struct request *req = iod->private; |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 589 | struct nvme_command *cmnd; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 590 | u16 control = 0; |
| 591 | u32 dsmgmt = 0; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 592 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 593 | if (req->cmd_flags & REQ_FUA) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 594 | control |= NVME_RW_FUA; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 595 | if (req->cmd_flags & (REQ_FAILFAST_DEV | REQ_RAHEAD)) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 596 | control |= NVME_RW_LR; |
| 597 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 598 | if (req->cmd_flags & REQ_RAHEAD) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 599 | dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; |
| 600 | |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 601 | cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; |
Matthew Wilcox | b8deb62 | 2011-01-26 10:08:25 -0500 | [diff] [blame] | 602 | memset(cmnd, 0, sizeof(*cmnd)); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 603 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 604 | cmnd->rw.opcode = (rq_data_dir(req) ? nvme_cmd_write : nvme_cmd_read); |
| 605 | cmnd->rw.command_id = req->tag; |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 606 | cmnd->rw.nsid = cpu_to_le32(ns->ns_id); |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 607 | cmnd->rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); |
| 608 | cmnd->rw.prp2 = cpu_to_le64(iod->first_dma); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 609 | cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); |
| 610 | cmnd->rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 611 | cmnd->rw.control = cpu_to_le16(control); |
| 612 | cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 613 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 614 | if (++nvmeq->sq_tail == nvmeq->q_depth) |
| 615 | nvmeq->sq_tail = 0; |
Matthew Wilcox | 7547881 | 2011-02-16 09:59:59 -0500 | [diff] [blame] | 616 | writel(nvmeq->sq_tail, nvmeq->q_db); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 617 | |
Matthew Wilcox | 1974b1a | 2011-02-10 12:01:09 -0500 | [diff] [blame] | 618 | return 0; |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 619 | } |
Matthew Wilcox | 1974b1a | 2011-02-10 12:01:09 -0500 | [diff] [blame] | 620 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 621 | static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx, |
| 622 | const struct blk_mq_queue_data *bd) |
Keith Busch | 53562be | 2014-04-29 11:41:29 -0600 | [diff] [blame] | 623 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 624 | struct nvme_ns *ns = hctx->queue->queuedata; |
| 625 | struct nvme_queue *nvmeq = hctx->driver_data; |
| 626 | struct request *req = bd->rq; |
| 627 | struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 628 | struct nvme_iod *iod; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 629 | int psegs = req->nr_phys_segments; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 630 | enum dma_data_direction dma_dir; |
| 631 | unsigned size = !(req->cmd_flags & REQ_DISCARD) ? blk_rq_bytes(req) : |
Keith Busch | 9dbbfab | 2014-10-06 15:23:06 -0600 | [diff] [blame] | 632 | sizeof(struct nvme_dsm_range); |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 633 | |
Keith Busch | 9dbbfab | 2014-10-06 15:23:06 -0600 | [diff] [blame] | 634 | iod = nvme_alloc_iod(psegs, size, ns->dev, GFP_ATOMIC); |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 635 | if (!iod) |
Jens Axboe | fe54303 | 2014-12-11 13:58:39 -0700 | [diff] [blame] | 636 | return BLK_MQ_RQ_QUEUE_BUSY; |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 637 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 638 | iod->private = req; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 639 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 640 | if (req->cmd_flags & REQ_DISCARD) { |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 641 | void *range; |
| 642 | /* |
| 643 | * We reuse the small pool to allocate the 16-byte range here |
| 644 | * as it is not worth having a special pool for these or |
| 645 | * additional cases to handle freeing the iod. |
| 646 | */ |
| 647 | range = dma_pool_alloc(nvmeq->dev->prp_small_pool, |
| 648 | GFP_ATOMIC, |
| 649 | &iod->first_dma); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 650 | if (!range) |
Jens Axboe | fe54303 | 2014-12-11 13:58:39 -0700 | [diff] [blame] | 651 | goto retry_cmd; |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 652 | iod_list(iod)[0] = (__le64 *)range; |
| 653 | iod->npages = 0; |
| 654 | } else if (psegs) { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 655 | dma_dir = rq_data_dir(req) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 656 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 657 | sg_init_table(iod->sg, psegs); |
| 658 | iod->nents = blk_rq_map_sg(req->q, req, iod->sg); |
Jens Axboe | fe54303 | 2014-12-11 13:58:39 -0700 | [diff] [blame] | 659 | if (!iod->nents) |
| 660 | goto error_cmd; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 661 | |
| 662 | if (!dma_map_sg(nvmeq->q_dmadev, iod->sg, iod->nents, dma_dir)) |
Jens Axboe | fe54303 | 2014-12-11 13:58:39 -0700 | [diff] [blame] | 663 | goto retry_cmd; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 664 | |
Jens Axboe | fe54303 | 2014-12-11 13:58:39 -0700 | [diff] [blame] | 665 | if (blk_rq_bytes(req) != |
| 666 | nvme_setup_prps(nvmeq->dev, iod, blk_rq_bytes(req), GFP_ATOMIC)) { |
| 667 | dma_unmap_sg(&nvmeq->dev->pci_dev->dev, iod->sg, |
| 668 | iod->nents, dma_dir); |
| 669 | goto retry_cmd; |
| 670 | } |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 671 | } |
| 672 | |
Keith Busch | 9af8785 | 2014-12-03 17:07:13 -0700 | [diff] [blame] | 673 | nvme_set_info(cmd, iod, req_completion); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 674 | spin_lock_irq(&nvmeq->q_lock); |
| 675 | if (req->cmd_flags & REQ_DISCARD) |
| 676 | nvme_submit_discard(nvmeq, ns, req, iod); |
| 677 | else if (req->cmd_flags & REQ_FLUSH) |
| 678 | nvme_submit_flush(nvmeq, ns, req->tag); |
| 679 | else |
| 680 | nvme_submit_iod(nvmeq, iod, ns); |
| 681 | |
| 682 | nvme_process_cq(nvmeq); |
| 683 | spin_unlock_irq(&nvmeq->q_lock); |
| 684 | return BLK_MQ_RQ_QUEUE_OK; |
| 685 | |
Jens Axboe | fe54303 | 2014-12-11 13:58:39 -0700 | [diff] [blame] | 686 | error_cmd: |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 687 | nvme_free_iod(nvmeq->dev, iod); |
Jens Axboe | fe54303 | 2014-12-11 13:58:39 -0700 | [diff] [blame] | 688 | return BLK_MQ_RQ_QUEUE_ERROR; |
| 689 | retry_cmd: |
| 690 | nvme_free_iod(nvmeq->dev, iod); |
| 691 | return BLK_MQ_RQ_QUEUE_BUSY; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 692 | } |
| 693 | |
Matthew Wilcox | e9539f4 | 2013-06-24 11:47:34 -0400 | [diff] [blame] | 694 | static int nvme_process_cq(struct nvme_queue *nvmeq) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 695 | { |
Matthew Wilcox | 8212346 | 2011-01-20 13:24:06 -0500 | [diff] [blame] | 696 | u16 head, phase; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 697 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 698 | head = nvmeq->cq_head; |
Matthew Wilcox | 8212346 | 2011-01-20 13:24:06 -0500 | [diff] [blame] | 699 | phase = nvmeq->cq_phase; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 700 | |
| 701 | for (;;) { |
Matthew Wilcox | c2f5b65 | 2011-10-15 07:33:46 -0400 | [diff] [blame] | 702 | void *ctx; |
| 703 | nvme_completion_fn fn; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 704 | struct nvme_completion cqe = nvmeq->cqes[head]; |
Matthew Wilcox | 8212346 | 2011-01-20 13:24:06 -0500 | [diff] [blame] | 705 | if ((le16_to_cpu(cqe.status) & 1) != phase) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 706 | break; |
| 707 | nvmeq->sq_head = le16_to_cpu(cqe.sq_head); |
| 708 | if (++head == nvmeq->q_depth) { |
| 709 | head = 0; |
Matthew Wilcox | 8212346 | 2011-01-20 13:24:06 -0500 | [diff] [blame] | 710 | phase = !phase; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 711 | } |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 712 | ctx = nvme_finish_cmd(nvmeq, cqe.command_id, &fn); |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 713 | fn(nvmeq, ctx, &cqe); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 714 | } |
| 715 | |
| 716 | /* If the controller ignores the cq head doorbell and continuously |
| 717 | * writes to the queue, it is theoretically possible to wrap around |
| 718 | * the queue twice and mistakenly return IRQ_NONE. Linux only |
| 719 | * requires that 0.1% of your interrupts are handled, so this isn't |
| 720 | * a big problem. |
| 721 | */ |
Matthew Wilcox | 8212346 | 2011-01-20 13:24:06 -0500 | [diff] [blame] | 722 | if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) |
Matthew Wilcox | e9539f4 | 2013-06-24 11:47:34 -0400 | [diff] [blame] | 723 | return 0; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 724 | |
Haiyan Hu | b80d5cc | 2013-09-10 11:25:37 +0800 | [diff] [blame] | 725 | writel(head, nvmeq->q_db + nvmeq->dev->db_stride); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 726 | nvmeq->cq_head = head; |
Matthew Wilcox | 8212346 | 2011-01-20 13:24:06 -0500 | [diff] [blame] | 727 | nvmeq->cq_phase = phase; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 728 | |
Matthew Wilcox | e9539f4 | 2013-06-24 11:47:34 -0400 | [diff] [blame] | 729 | nvmeq->cqe_seen = 1; |
| 730 | return 1; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 731 | } |
| 732 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 733 | /* Admin queue isn't initialized as a request queue. If at some point this |
| 734 | * happens anyway, make sure to notify the user */ |
| 735 | static int nvme_admin_queue_rq(struct blk_mq_hw_ctx *hctx, |
| 736 | const struct blk_mq_queue_data *bd) |
Matthew Wilcox | 7d82245 | 2013-06-24 12:03:57 -0400 | [diff] [blame] | 737 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 738 | WARN_ON_ONCE(1); |
| 739 | return BLK_MQ_RQ_QUEUE_ERROR; |
Matthew Wilcox | 7d82245 | 2013-06-24 12:03:57 -0400 | [diff] [blame] | 740 | } |
| 741 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 742 | static irqreturn_t nvme_irq(int irq, void *data) |
| 743 | { |
Matthew Wilcox | 58ffacb | 2011-02-06 07:28:06 -0500 | [diff] [blame] | 744 | irqreturn_t result; |
| 745 | struct nvme_queue *nvmeq = data; |
| 746 | spin_lock(&nvmeq->q_lock); |
Matthew Wilcox | e9539f4 | 2013-06-24 11:47:34 -0400 | [diff] [blame] | 747 | nvme_process_cq(nvmeq); |
| 748 | result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; |
| 749 | nvmeq->cqe_seen = 0; |
Matthew Wilcox | 58ffacb | 2011-02-06 07:28:06 -0500 | [diff] [blame] | 750 | spin_unlock(&nvmeq->q_lock); |
| 751 | return result; |
| 752 | } |
| 753 | |
| 754 | static irqreturn_t nvme_irq_check(int irq, void *data) |
| 755 | { |
| 756 | struct nvme_queue *nvmeq = data; |
| 757 | struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; |
| 758 | if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) |
| 759 | return IRQ_NONE; |
| 760 | return IRQ_WAKE_THREAD; |
| 761 | } |
| 762 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 763 | static void nvme_abort_cmd_info(struct nvme_queue *nvmeq, struct nvme_cmd_info * |
| 764 | cmd_info) |
Matthew Wilcox | 3c0cf13 | 2011-02-04 16:03:56 -0500 | [diff] [blame] | 765 | { |
| 766 | spin_lock_irq(&nvmeq->q_lock); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 767 | cancel_cmd_info(cmd_info, NULL); |
Matthew Wilcox | 3c0cf13 | 2011-02-04 16:03:56 -0500 | [diff] [blame] | 768 | spin_unlock_irq(&nvmeq->q_lock); |
| 769 | } |
| 770 | |
Matthew Wilcox | c2f5b65 | 2011-10-15 07:33:46 -0400 | [diff] [blame] | 771 | struct sync_cmd_info { |
| 772 | struct task_struct *task; |
| 773 | u32 result; |
| 774 | int status; |
| 775 | }; |
| 776 | |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 777 | static void sync_completion(struct nvme_queue *nvmeq, void *ctx, |
Matthew Wilcox | c2f5b65 | 2011-10-15 07:33:46 -0400 | [diff] [blame] | 778 | struct nvme_completion *cqe) |
| 779 | { |
| 780 | struct sync_cmd_info *cmdinfo = ctx; |
| 781 | cmdinfo->result = le32_to_cpup(&cqe->result); |
| 782 | cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; |
| 783 | wake_up_process(cmdinfo->task); |
| 784 | } |
| 785 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 786 | /* |
| 787 | * Returns 0 on success. If the result is negative, it's a Linux error code; |
| 788 | * if the result is positive, it's an NVM Express status code |
| 789 | */ |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 790 | static int nvme_submit_sync_cmd(struct request *req, struct nvme_command *cmd, |
Vishal Verma | 5d0f613 | 2013-03-04 18:40:58 -0700 | [diff] [blame] | 791 | u32 *result, unsigned timeout) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 792 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 793 | int ret; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 794 | struct sync_cmd_info cmdinfo; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 795 | struct nvme_cmd_info *cmd_rq = blk_mq_rq_to_pdu(req); |
| 796 | struct nvme_queue *nvmeq = cmd_rq->nvmeq; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 797 | |
| 798 | cmdinfo.task = current; |
| 799 | cmdinfo.status = -EINTR; |
| 800 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 801 | cmd->common.command_id = req->tag; |
| 802 | |
| 803 | nvme_set_info(cmd_rq, &cmdinfo, sync_completion); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 804 | |
Matthew Wilcox | 3c0cf13 | 2011-02-04 16:03:56 -0500 | [diff] [blame] | 805 | set_current_state(TASK_KILLABLE); |
Keith Busch | 4f5099a | 2014-03-03 16:39:13 -0700 | [diff] [blame] | 806 | ret = nvme_submit_cmd(nvmeq, cmd); |
| 807 | if (ret) { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 808 | nvme_finish_cmd(nvmeq, req->tag, NULL); |
Keith Busch | 4f5099a | 2014-03-03 16:39:13 -0700 | [diff] [blame] | 809 | set_current_state(TASK_RUNNING); |
Keith Busch | 4f5099a | 2014-03-03 16:39:13 -0700 | [diff] [blame] | 810 | } |
Jens Axboe | 849c6e7 | 2014-12-12 08:53:40 -0700 | [diff] [blame] | 811 | ret = schedule_timeout(timeout); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 812 | |
Jens Axboe | 849c6e7 | 2014-12-12 08:53:40 -0700 | [diff] [blame] | 813 | /* |
| 814 | * Ensure that sync_completion has either run, or that it will |
| 815 | * never run. |
| 816 | */ |
| 817 | nvme_abort_cmd_info(nvmeq, blk_mq_rq_to_pdu(req)); |
| 818 | |
| 819 | /* |
| 820 | * We never got the completion |
| 821 | */ |
| 822 | if (cmdinfo.status == -EINTR) |
Matthew Wilcox | 3c0cf13 | 2011-02-04 16:03:56 -0500 | [diff] [blame] | 823 | return -EINTR; |
Matthew Wilcox | 3c0cf13 | 2011-02-04 16:03:56 -0500 | [diff] [blame] | 824 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 825 | if (result) |
| 826 | *result = cmdinfo.result; |
| 827 | |
| 828 | return cmdinfo.status; |
| 829 | } |
| 830 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 831 | static int nvme_submit_async_admin_req(struct nvme_dev *dev) |
| 832 | { |
| 833 | struct nvme_queue *nvmeq = dev->queues[0]; |
| 834 | struct nvme_command c; |
| 835 | struct nvme_cmd_info *cmd_info; |
| 836 | struct request *req; |
| 837 | |
Jens Axboe | 6dcc0cf | 2014-11-18 08:21:18 -0700 | [diff] [blame] | 838 | req = blk_mq_alloc_request(dev->admin_q, WRITE, GFP_ATOMIC, false); |
Dan Carpenter | 9f173b3 | 2014-11-05 23:39:09 +0300 | [diff] [blame] | 839 | if (IS_ERR(req)) |
| 840 | return PTR_ERR(req); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 841 | |
Keith Busch | c917dfe | 2015-01-07 18:55:48 -0700 | [diff] [blame] | 842 | req->cmd_flags |= REQ_NO_TIMEOUT; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 843 | cmd_info = blk_mq_rq_to_pdu(req); |
| 844 | nvme_set_info(cmd_info, req, async_req_completion); |
| 845 | |
| 846 | memset(&c, 0, sizeof(c)); |
| 847 | c.common.opcode = nvme_admin_async_event; |
| 848 | c.common.command_id = req->tag; |
| 849 | |
| 850 | return __nvme_submit_cmd(nvmeq, &c); |
| 851 | } |
| 852 | |
| 853 | static int nvme_submit_admin_async_cmd(struct nvme_dev *dev, |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 854 | struct nvme_command *cmd, |
| 855 | struct async_cmd_info *cmdinfo, unsigned timeout) |
| 856 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 857 | struct nvme_queue *nvmeq = dev->queues[0]; |
| 858 | struct request *req; |
| 859 | struct nvme_cmd_info *cmd_rq; |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 860 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 861 | req = blk_mq_alloc_request(dev->admin_q, WRITE, GFP_KERNEL, false); |
Dan Carpenter | 9f173b3 | 2014-11-05 23:39:09 +0300 | [diff] [blame] | 862 | if (IS_ERR(req)) |
| 863 | return PTR_ERR(req); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 864 | |
| 865 | req->timeout = timeout; |
| 866 | cmd_rq = blk_mq_rq_to_pdu(req); |
| 867 | cmdinfo->req = req; |
| 868 | nvme_set_info(cmd_rq, cmdinfo, async_completion); |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 869 | cmdinfo->status = -EINTR; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 870 | |
| 871 | cmd->common.command_id = req->tag; |
| 872 | |
Keith Busch | 4f5099a | 2014-03-03 16:39:13 -0700 | [diff] [blame] | 873 | return nvme_submit_cmd(nvmeq, cmd); |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 874 | } |
| 875 | |
kbuild test robot | a64e6bb | 2014-11-05 18:47:07 +0800 | [diff] [blame] | 876 | static int __nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 877 | u32 *result, unsigned timeout) |
| 878 | { |
| 879 | int res; |
| 880 | struct request *req; |
| 881 | |
| 882 | req = blk_mq_alloc_request(dev->admin_q, WRITE, GFP_KERNEL, false); |
Jens Axboe | 97fe383 | 2014-12-10 13:02:44 -0700 | [diff] [blame] | 883 | if (IS_ERR(req)) |
| 884 | return PTR_ERR(req); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 885 | res = nvme_submit_sync_cmd(req, cmd, result, timeout); |
Jens Axboe | 9d135bb | 2014-11-17 10:43:42 -0700 | [diff] [blame] | 886 | blk_mq_free_request(req); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 887 | return res; |
| 888 | } |
| 889 | |
Vishal Verma | 5d0f613 | 2013-03-04 18:40:58 -0700 | [diff] [blame] | 890 | int nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 891 | u32 *result) |
| 892 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 893 | return __nvme_submit_admin_cmd(dev, cmd, result, ADMIN_TIMEOUT); |
Keith Busch | 4f5099a | 2014-03-03 16:39:13 -0700 | [diff] [blame] | 894 | } |
| 895 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 896 | int nvme_submit_io_cmd(struct nvme_dev *dev, struct nvme_ns *ns, |
| 897 | struct nvme_command *cmd, u32 *result) |
Keith Busch | 4f5099a | 2014-03-03 16:39:13 -0700 | [diff] [blame] | 898 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 899 | int res; |
| 900 | struct request *req; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 901 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 902 | req = blk_mq_alloc_request(ns->queue, WRITE, (GFP_KERNEL|__GFP_WAIT), |
| 903 | false); |
Jens Axboe | 97fe383 | 2014-12-10 13:02:44 -0700 | [diff] [blame] | 904 | if (IS_ERR(req)) |
| 905 | return PTR_ERR(req); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 906 | res = nvme_submit_sync_cmd(req, cmd, result, NVME_IO_TIMEOUT); |
Jens Axboe | 9d135bb | 2014-11-17 10:43:42 -0700 | [diff] [blame] | 907 | blk_mq_free_request(req); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 908 | return res; |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 909 | } |
| 910 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 911 | static int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) |
| 912 | { |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 913 | struct nvme_command c; |
| 914 | |
| 915 | memset(&c, 0, sizeof(c)); |
| 916 | c.delete_queue.opcode = opcode; |
| 917 | c.delete_queue.qid = cpu_to_le16(id); |
| 918 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 919 | return nvme_submit_admin_cmd(dev, &c, NULL); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 920 | } |
| 921 | |
| 922 | static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, |
| 923 | struct nvme_queue *nvmeq) |
| 924 | { |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 925 | struct nvme_command c; |
| 926 | int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; |
| 927 | |
| 928 | memset(&c, 0, sizeof(c)); |
| 929 | c.create_cq.opcode = nvme_admin_create_cq; |
| 930 | c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); |
| 931 | c.create_cq.cqid = cpu_to_le16(qid); |
| 932 | c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); |
| 933 | c.create_cq.cq_flags = cpu_to_le16(flags); |
| 934 | c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); |
| 935 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 936 | return nvme_submit_admin_cmd(dev, &c, NULL); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 937 | } |
| 938 | |
| 939 | static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, |
| 940 | struct nvme_queue *nvmeq) |
| 941 | { |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 942 | struct nvme_command c; |
| 943 | int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; |
| 944 | |
| 945 | memset(&c, 0, sizeof(c)); |
| 946 | c.create_sq.opcode = nvme_admin_create_sq; |
| 947 | c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); |
| 948 | c.create_sq.sqid = cpu_to_le16(qid); |
| 949 | c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); |
| 950 | c.create_sq.sq_flags = cpu_to_le16(flags); |
| 951 | c.create_sq.cqid = cpu_to_le16(qid); |
| 952 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 953 | return nvme_submit_admin_cmd(dev, &c, NULL); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 954 | } |
| 955 | |
| 956 | static int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) |
| 957 | { |
| 958 | return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); |
| 959 | } |
| 960 | |
| 961 | static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) |
| 962 | { |
| 963 | return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); |
| 964 | } |
| 965 | |
Vishal Verma | 5d0f613 | 2013-03-04 18:40:58 -0700 | [diff] [blame] | 966 | int nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns, |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 967 | dma_addr_t dma_addr) |
| 968 | { |
| 969 | struct nvme_command c; |
| 970 | |
| 971 | memset(&c, 0, sizeof(c)); |
| 972 | c.identify.opcode = nvme_admin_identify; |
| 973 | c.identify.nsid = cpu_to_le32(nsid); |
| 974 | c.identify.prp1 = cpu_to_le64(dma_addr); |
| 975 | c.identify.cns = cpu_to_le32(cns); |
| 976 | |
| 977 | return nvme_submit_admin_cmd(dev, &c, NULL); |
| 978 | } |
| 979 | |
Vishal Verma | 5d0f613 | 2013-03-04 18:40:58 -0700 | [diff] [blame] | 980 | int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid, |
Keith Busch | 08df1e0 | 2012-09-21 10:52:13 -0600 | [diff] [blame] | 981 | dma_addr_t dma_addr, u32 *result) |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 982 | { |
| 983 | struct nvme_command c; |
| 984 | |
| 985 | memset(&c, 0, sizeof(c)); |
| 986 | c.features.opcode = nvme_admin_get_features; |
Keith Busch | a42cecc | 2012-07-25 16:06:38 -0600 | [diff] [blame] | 987 | c.features.nsid = cpu_to_le32(nsid); |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 988 | c.features.prp1 = cpu_to_le64(dma_addr); |
| 989 | c.features.fid = cpu_to_le32(fid); |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 990 | |
Keith Busch | 08df1e0 | 2012-09-21 10:52:13 -0600 | [diff] [blame] | 991 | return nvme_submit_admin_cmd(dev, &c, result); |
Matthew Wilcox | df34813 | 2012-01-11 07:29:56 -0700 | [diff] [blame] | 992 | } |
| 993 | |
Vishal Verma | 5d0f613 | 2013-03-04 18:40:58 -0700 | [diff] [blame] | 994 | int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11, |
| 995 | dma_addr_t dma_addr, u32 *result) |
Matthew Wilcox | df34813 | 2012-01-11 07:29:56 -0700 | [diff] [blame] | 996 | { |
| 997 | struct nvme_command c; |
| 998 | |
| 999 | memset(&c, 0, sizeof(c)); |
| 1000 | c.features.opcode = nvme_admin_set_features; |
| 1001 | c.features.prp1 = cpu_to_le64(dma_addr); |
| 1002 | c.features.fid = cpu_to_le32(fid); |
| 1003 | c.features.dword11 = cpu_to_le32(dword11); |
| 1004 | |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 1005 | return nvme_submit_admin_cmd(dev, &c, result); |
| 1006 | } |
| 1007 | |
Matthew Wilcox | a09115b | 2012-08-07 15:56:23 -0400 | [diff] [blame] | 1008 | /** |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1009 | * nvme_abort_req - Attempt aborting a request |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1010 | * |
| 1011 | * Schedule controller reset if the command was already aborted once before and |
| 1012 | * still hasn't been returned to the driver, or if this is the admin queue. |
| 1013 | */ |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1014 | static void nvme_abort_req(struct request *req) |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1015 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1016 | struct nvme_cmd_info *cmd_rq = blk_mq_rq_to_pdu(req); |
| 1017 | struct nvme_queue *nvmeq = cmd_rq->nvmeq; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1018 | struct nvme_dev *dev = nvmeq->dev; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1019 | struct request *abort_req; |
| 1020 | struct nvme_cmd_info *abort_cmd; |
| 1021 | struct nvme_command cmd; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1022 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1023 | if (!nvmeq->qid || cmd_rq->aborted) { |
Keith Busch | 7a509a6 | 2015-01-07 18:55:53 -0700 | [diff] [blame] | 1024 | unsigned long flags; |
| 1025 | |
| 1026 | spin_lock_irqsave(&dev_list_lock, flags); |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1027 | if (work_busy(&dev->reset_work)) |
Keith Busch | 7a509a6 | 2015-01-07 18:55:53 -0700 | [diff] [blame] | 1028 | goto out; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1029 | list_del_init(&dev->node); |
| 1030 | dev_warn(&dev->pci_dev->dev, |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1031 | "I/O %d QID %d timeout, reset controller\n", |
| 1032 | req->tag, nvmeq->qid); |
Tejun Heo | 9ca9737 | 2014-03-07 10:24:49 -0500 | [diff] [blame] | 1033 | dev->reset_workfn = nvme_reset_failed_dev; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1034 | queue_work(nvme_workq, &dev->reset_work); |
Keith Busch | 7a509a6 | 2015-01-07 18:55:53 -0700 | [diff] [blame] | 1035 | out: |
| 1036 | spin_unlock_irqrestore(&dev_list_lock, flags); |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1037 | return; |
| 1038 | } |
| 1039 | |
| 1040 | if (!dev->abort_limit) |
| 1041 | return; |
| 1042 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1043 | abort_req = blk_mq_alloc_request(dev->admin_q, WRITE, GFP_ATOMIC, |
| 1044 | false); |
Dan Carpenter | 9f173b3 | 2014-11-05 23:39:09 +0300 | [diff] [blame] | 1045 | if (IS_ERR(abort_req)) |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1046 | return; |
| 1047 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1048 | abort_cmd = blk_mq_rq_to_pdu(abort_req); |
| 1049 | nvme_set_info(abort_cmd, abort_req, abort_completion); |
| 1050 | |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1051 | memset(&cmd, 0, sizeof(cmd)); |
| 1052 | cmd.abort.opcode = nvme_admin_abort_cmd; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1053 | cmd.abort.cid = req->tag; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1054 | cmd.abort.sqid = cpu_to_le16(nvmeq->qid); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1055 | cmd.abort.command_id = abort_req->tag; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1056 | |
| 1057 | --dev->abort_limit; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1058 | cmd_rq->aborted = 1; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1059 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1060 | dev_warn(nvmeq->q_dmadev, "Aborting I/O %d QID %d\n", req->tag, |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1061 | nvmeq->qid); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1062 | if (nvme_submit_cmd(dev->queues[0], &cmd) < 0) { |
| 1063 | dev_warn(nvmeq->q_dmadev, |
| 1064 | "Could not abort I/O %d QID %d", |
| 1065 | req->tag, nvmeq->qid); |
Sam Bradshaw | c87fd54 | 2014-12-10 13:00:31 -0700 | [diff] [blame] | 1066 | blk_mq_free_request(abort_req); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1067 | } |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1068 | } |
| 1069 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1070 | static void nvme_cancel_queue_ios(struct blk_mq_hw_ctx *hctx, |
| 1071 | struct request *req, void *data, bool reserved) |
Matthew Wilcox | a09115b | 2012-08-07 15:56:23 -0400 | [diff] [blame] | 1072 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1073 | struct nvme_queue *nvmeq = data; |
| 1074 | void *ctx; |
| 1075 | nvme_completion_fn fn; |
| 1076 | struct nvme_cmd_info *cmd; |
Keith Busch | cef6a94 | 2015-01-07 18:55:51 -0700 | [diff] [blame] | 1077 | struct nvme_completion cqe; |
| 1078 | |
| 1079 | if (!blk_mq_request_started(req)) |
| 1080 | return; |
Matthew Wilcox | a09115b | 2012-08-07 15:56:23 -0400 | [diff] [blame] | 1081 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1082 | cmd = blk_mq_rq_to_pdu(req); |
Matthew Wilcox | a09115b | 2012-08-07 15:56:23 -0400 | [diff] [blame] | 1083 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1084 | if (cmd->ctx == CMD_CTX_CANCELLED) |
| 1085 | return; |
| 1086 | |
Keith Busch | cef6a94 | 2015-01-07 18:55:51 -0700 | [diff] [blame] | 1087 | if (blk_queue_dying(req->q)) |
| 1088 | cqe.status = cpu_to_le16((NVME_SC_ABORT_REQ | NVME_SC_DNR) << 1); |
| 1089 | else |
| 1090 | cqe.status = cpu_to_le16(NVME_SC_ABORT_REQ << 1); |
| 1091 | |
| 1092 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1093 | dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d QID %d\n", |
| 1094 | req->tag, nvmeq->qid); |
| 1095 | ctx = cancel_cmd_info(cmd, &fn); |
| 1096 | fn(nvmeq, ctx, &cqe); |
| 1097 | } |
| 1098 | |
| 1099 | static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) |
| 1100 | { |
| 1101 | struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); |
| 1102 | struct nvme_queue *nvmeq = cmd->nvmeq; |
| 1103 | |
Keith Busch | 7a509a6 | 2015-01-07 18:55:53 -0700 | [diff] [blame] | 1104 | /* |
| 1105 | * The aborted req will be completed on receiving the abort req. |
| 1106 | * We enable the timer again. If hit twice, it'll cause a device reset, |
| 1107 | * as the device then is in a faulty state. |
| 1108 | */ |
| 1109 | int ret = BLK_EH_RESET_TIMER; |
| 1110 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1111 | dev_warn(nvmeq->q_dmadev, "Timeout I/O %d QID %d\n", req->tag, |
| 1112 | nvmeq->qid); |
Keith Busch | c917dfe | 2015-01-07 18:55:48 -0700 | [diff] [blame] | 1113 | |
Keith Busch | 7a509a6 | 2015-01-07 18:55:53 -0700 | [diff] [blame] | 1114 | spin_lock_irq(&nvmeq->q_lock); |
Keith Busch | c917dfe | 2015-01-07 18:55:48 -0700 | [diff] [blame] | 1115 | if (!nvmeq->dev->initialized) { |
| 1116 | /* |
| 1117 | * Force cancelled command frees the request, which requires we |
| 1118 | * return BLK_EH_NOT_HANDLED. |
| 1119 | */ |
| 1120 | nvme_cancel_queue_ios(nvmeq->hctx, req, nvmeq, reserved); |
Keith Busch | 7a509a6 | 2015-01-07 18:55:53 -0700 | [diff] [blame] | 1121 | ret = BLK_EH_NOT_HANDLED; |
| 1122 | } else |
| 1123 | nvme_abort_req(req); |
| 1124 | spin_unlock_irq(&nvmeq->q_lock); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1125 | |
Keith Busch | 7a509a6 | 2015-01-07 18:55:53 -0700 | [diff] [blame] | 1126 | return ret; |
Matthew Wilcox | a09115b | 2012-08-07 15:56:23 -0400 | [diff] [blame] | 1127 | } |
| 1128 | |
Keith Busch | f435c28 | 2014-07-07 09:14:42 -0600 | [diff] [blame] | 1129 | static void nvme_free_queue(struct nvme_queue *nvmeq) |
Matthew Wilcox | 9e86677 | 2012-08-03 13:55:56 -0400 | [diff] [blame] | 1130 | { |
| 1131 | dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), |
| 1132 | (void *)nvmeq->cqes, nvmeq->cq_dma_addr); |
| 1133 | dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), |
| 1134 | nvmeq->sq_cmds, nvmeq->sq_dma_addr); |
| 1135 | kfree(nvmeq); |
| 1136 | } |
| 1137 | |
Keith Busch | a1a5ef9 | 2013-12-16 13:50:00 -0500 | [diff] [blame] | 1138 | static void nvme_free_queues(struct nvme_dev *dev, int lowest) |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1139 | { |
Keith Busch | f435c28 | 2014-07-07 09:14:42 -0600 | [diff] [blame] | 1140 | LLIST_HEAD(q_list); |
| 1141 | struct nvme_queue *nvmeq, *next; |
| 1142 | struct llist_node *entry; |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1143 | int i; |
| 1144 | |
Keith Busch | a1a5ef9 | 2013-12-16 13:50:00 -0500 | [diff] [blame] | 1145 | for (i = dev->queue_count - 1; i >= lowest; i--) { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1146 | struct nvme_queue *nvmeq = dev->queues[i]; |
Keith Busch | f435c28 | 2014-07-07 09:14:42 -0600 | [diff] [blame] | 1147 | llist_add(&nvmeq->node, &q_list); |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1148 | dev->queue_count--; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1149 | dev->queues[i] = NULL; |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1150 | } |
Keith Busch | f435c28 | 2014-07-07 09:14:42 -0600 | [diff] [blame] | 1151 | synchronize_rcu(); |
| 1152 | entry = llist_del_all(&q_list); |
| 1153 | llist_for_each_entry_safe(nvmeq, next, entry, node) |
| 1154 | nvme_free_queue(nvmeq); |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1155 | } |
| 1156 | |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 1157 | /** |
| 1158 | * nvme_suspend_queue - put queue into suspended state |
| 1159 | * @nvmeq - queue to suspend |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 1160 | */ |
| 1161 | static int nvme_suspend_queue(struct nvme_queue *nvmeq) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1162 | { |
Keith Busch | 2b25d98 | 2014-12-22 12:59:04 -0700 | [diff] [blame] | 1163 | int vector; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1164 | |
Matthew Wilcox | a09115b | 2012-08-07 15:56:23 -0400 | [diff] [blame] | 1165 | spin_lock_irq(&nvmeq->q_lock); |
Keith Busch | 2b25d98 | 2014-12-22 12:59:04 -0700 | [diff] [blame] | 1166 | if (nvmeq->cq_vector == -1) { |
| 1167 | spin_unlock_irq(&nvmeq->q_lock); |
| 1168 | return 1; |
| 1169 | } |
| 1170 | vector = nvmeq->dev->entry[nvmeq->cq_vector].vector; |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 1171 | nvmeq->dev->online_queues--; |
Keith Busch | 2b25d98 | 2014-12-22 12:59:04 -0700 | [diff] [blame] | 1172 | nvmeq->cq_vector = -1; |
Matthew Wilcox | a09115b | 2012-08-07 15:56:23 -0400 | [diff] [blame] | 1173 | spin_unlock_irq(&nvmeq->q_lock); |
| 1174 | |
Matthew Wilcox | aba2080 | 2011-03-27 08:52:06 -0400 | [diff] [blame] | 1175 | irq_set_affinity_hint(vector, NULL); |
| 1176 | free_irq(vector, nvmeq); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1177 | |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 1178 | return 0; |
| 1179 | } |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1180 | |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 1181 | static void nvme_clear_queue(struct nvme_queue *nvmeq) |
| 1182 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1183 | struct blk_mq_hw_ctx *hctx = nvmeq->hctx; |
| 1184 | |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1185 | spin_lock_irq(&nvmeq->q_lock); |
| 1186 | nvme_process_cq(nvmeq); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1187 | if (hctx && hctx->tags) |
| 1188 | blk_mq_tag_busy_iter(hctx, nvme_cancel_queue_ios, nvmeq); |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1189 | spin_unlock_irq(&nvmeq->q_lock); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1190 | } |
| 1191 | |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 1192 | static void nvme_disable_queue(struct nvme_dev *dev, int qid) |
| 1193 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1194 | struct nvme_queue *nvmeq = dev->queues[qid]; |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 1195 | |
| 1196 | if (!nvmeq) |
| 1197 | return; |
| 1198 | if (nvme_suspend_queue(nvmeq)) |
| 1199 | return; |
| 1200 | |
Keith Busch | 0e53d18 | 2013-12-10 13:10:39 -0700 | [diff] [blame] | 1201 | /* Don't tell the adapter to delete the admin queue. |
| 1202 | * Don't tell a removed adapter to delete IO queues. */ |
| 1203 | if (qid && readl(&dev->bar->csts) != -1) { |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1204 | adapter_delete_sq(dev, qid); |
| 1205 | adapter_delete_cq(dev, qid); |
| 1206 | } |
Keith Busch | 0fb59cb | 2015-01-07 18:55:50 -0700 | [diff] [blame] | 1207 | if (!qid && dev->admin_q) |
| 1208 | blk_mq_freeze_queue_start(dev->admin_q); |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 1209 | nvme_clear_queue(nvmeq); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1210 | } |
| 1211 | |
| 1212 | static struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, |
Keith Busch | 2b25d98 | 2014-12-22 12:59:04 -0700 | [diff] [blame] | 1213 | int depth) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1214 | { |
| 1215 | struct device *dmadev = &dev->pci_dev->dev; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1216 | struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq), GFP_KERNEL); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1217 | if (!nvmeq) |
| 1218 | return NULL; |
| 1219 | |
Joe Perches | 4d51abf | 2014-06-15 13:37:33 -0700 | [diff] [blame] | 1220 | nvmeq->cqes = dma_zalloc_coherent(dmadev, CQ_SIZE(depth), |
| 1221 | &nvmeq->cq_dma_addr, GFP_KERNEL); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1222 | if (!nvmeq->cqes) |
| 1223 | goto free_nvmeq; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1224 | |
| 1225 | nvmeq->sq_cmds = dma_alloc_coherent(dmadev, SQ_SIZE(depth), |
| 1226 | &nvmeq->sq_dma_addr, GFP_KERNEL); |
| 1227 | if (!nvmeq->sq_cmds) |
| 1228 | goto free_cqdma; |
| 1229 | |
| 1230 | nvmeq->q_dmadev = dmadev; |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 1231 | nvmeq->dev = dev; |
Matthew Wilcox | 3193f07 | 2014-01-27 15:57:22 -0500 | [diff] [blame] | 1232 | snprintf(nvmeq->irqname, sizeof(nvmeq->irqname), "nvme%dq%d", |
| 1233 | dev->instance, qid); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1234 | spin_lock_init(&nvmeq->q_lock); |
| 1235 | nvmeq->cq_head = 0; |
Matthew Wilcox | 8212346 | 2011-01-20 13:24:06 -0500 | [diff] [blame] | 1236 | nvmeq->cq_phase = 1; |
Haiyan Hu | b80d5cc | 2013-09-10 11:25:37 +0800 | [diff] [blame] | 1237 | nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1238 | nvmeq->q_depth = depth; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1239 | nvmeq->qid = qid; |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1240 | dev->queue_count++; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1241 | dev->queues[qid] = nvmeq; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1242 | |
| 1243 | return nvmeq; |
| 1244 | |
| 1245 | free_cqdma: |
Keith Busch | 68b8eca | 2013-05-01 13:07:47 -0600 | [diff] [blame] | 1246 | dma_free_coherent(dmadev, CQ_SIZE(depth), (void *)nvmeq->cqes, |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1247 | nvmeq->cq_dma_addr); |
| 1248 | free_nvmeq: |
| 1249 | kfree(nvmeq); |
| 1250 | return NULL; |
| 1251 | } |
| 1252 | |
Matthew Wilcox | 3001082 | 2011-01-20 09:10:15 -0500 | [diff] [blame] | 1253 | static int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, |
| 1254 | const char *name) |
| 1255 | { |
Matthew Wilcox | 58ffacb | 2011-02-06 07:28:06 -0500 | [diff] [blame] | 1256 | if (use_threaded_interrupts) |
| 1257 | return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, |
Michael Opdenacker | 481e5ba | 2013-10-12 06:23:29 +0200 | [diff] [blame] | 1258 | nvme_irq_check, nvme_irq, IRQF_SHARED, |
Matthew Wilcox | 58ffacb | 2011-02-06 07:28:06 -0500 | [diff] [blame] | 1259 | name, nvmeq); |
Matthew Wilcox | 3001082 | 2011-01-20 09:10:15 -0500 | [diff] [blame] | 1260 | return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, |
Michael Opdenacker | 481e5ba | 2013-10-12 06:23:29 +0200 | [diff] [blame] | 1261 | IRQF_SHARED, name, nvmeq); |
Matthew Wilcox | 3001082 | 2011-01-20 09:10:15 -0500 | [diff] [blame] | 1262 | } |
| 1263 | |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1264 | static void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1265 | { |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1266 | struct nvme_dev *dev = nvmeq->dev; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1267 | |
Keith Busch | 7be50e9 | 2014-09-10 15:48:47 -0600 | [diff] [blame] | 1268 | spin_lock_irq(&nvmeq->q_lock); |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1269 | nvmeq->sq_tail = 0; |
| 1270 | nvmeq->cq_head = 0; |
| 1271 | nvmeq->cq_phase = 1; |
Haiyan Hu | b80d5cc | 2013-09-10 11:25:37 +0800 | [diff] [blame] | 1272 | nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1273 | memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 1274 | dev->online_queues++; |
Keith Busch | 7be50e9 | 2014-09-10 15:48:47 -0600 | [diff] [blame] | 1275 | spin_unlock_irq(&nvmeq->q_lock); |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1276 | } |
| 1277 | |
| 1278 | static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) |
| 1279 | { |
| 1280 | struct nvme_dev *dev = nvmeq->dev; |
| 1281 | int result; |
Matthew Wilcox | 3f85d50 | 2011-02-01 08:39:04 -0500 | [diff] [blame] | 1282 | |
Keith Busch | 2b25d98 | 2014-12-22 12:59:04 -0700 | [diff] [blame] | 1283 | nvmeq->cq_vector = qid - 1; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1284 | result = adapter_alloc_cq(dev, qid, nvmeq); |
| 1285 | if (result < 0) |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1286 | return result; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1287 | |
| 1288 | result = adapter_alloc_sq(dev, qid, nvmeq); |
| 1289 | if (result < 0) |
| 1290 | goto release_cq; |
| 1291 | |
Matthew Wilcox | 3193f07 | 2014-01-27 15:57:22 -0500 | [diff] [blame] | 1292 | result = queue_request_irq(dev, nvmeq, nvmeq->irqname); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1293 | if (result < 0) |
| 1294 | goto release_sq; |
| 1295 | |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1296 | nvme_init_queue(nvmeq, qid); |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1297 | return result; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1298 | |
| 1299 | release_sq: |
| 1300 | adapter_delete_sq(dev, qid); |
| 1301 | release_cq: |
| 1302 | adapter_delete_cq(dev, qid); |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1303 | return result; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1304 | } |
| 1305 | |
Matthew Wilcox | ba47e38 | 2013-05-04 06:43:16 -0400 | [diff] [blame] | 1306 | static int nvme_wait_ready(struct nvme_dev *dev, u64 cap, bool enabled) |
| 1307 | { |
| 1308 | unsigned long timeout; |
| 1309 | u32 bit = enabled ? NVME_CSTS_RDY : 0; |
| 1310 | |
| 1311 | timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; |
| 1312 | |
| 1313 | while ((readl(&dev->bar->csts) & NVME_CSTS_RDY) != bit) { |
| 1314 | msleep(100); |
| 1315 | if (fatal_signal_pending(current)) |
| 1316 | return -EINTR; |
| 1317 | if (time_after(jiffies, timeout)) { |
| 1318 | dev_err(&dev->pci_dev->dev, |
Matthew Wilcox | 27e8166 | 2014-04-11 11:58:45 -0400 | [diff] [blame] | 1319 | "Device not ready; aborting %s\n", enabled ? |
| 1320 | "initialisation" : "reset"); |
Matthew Wilcox | ba47e38 | 2013-05-04 06:43:16 -0400 | [diff] [blame] | 1321 | return -ENODEV; |
| 1322 | } |
| 1323 | } |
| 1324 | |
| 1325 | return 0; |
| 1326 | } |
| 1327 | |
| 1328 | /* |
| 1329 | * If the device has been passed off to us in an enabled state, just clear |
| 1330 | * the enabled bit. The spec says we should set the 'shutdown notification |
| 1331 | * bits', but doing so may cause the device to complete commands to the |
| 1332 | * admin queue ... and we don't know what memory that might be pointing at! |
| 1333 | */ |
| 1334 | static int nvme_disable_ctrl(struct nvme_dev *dev, u64 cap) |
| 1335 | { |
Dan McLeran | 0107952 | 2014-06-23 08:24:36 -0600 | [diff] [blame] | 1336 | dev->ctrl_config &= ~NVME_CC_SHN_MASK; |
| 1337 | dev->ctrl_config &= ~NVME_CC_ENABLE; |
| 1338 | writel(dev->ctrl_config, &dev->bar->cc); |
Matthew Wilcox | 44af146 | 2013-05-04 06:43:17 -0400 | [diff] [blame] | 1339 | |
Matthew Wilcox | ba47e38 | 2013-05-04 06:43:16 -0400 | [diff] [blame] | 1340 | return nvme_wait_ready(dev, cap, false); |
| 1341 | } |
| 1342 | |
| 1343 | static int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap) |
| 1344 | { |
Dan McLeran | 0107952 | 2014-06-23 08:24:36 -0600 | [diff] [blame] | 1345 | dev->ctrl_config &= ~NVME_CC_SHN_MASK; |
| 1346 | dev->ctrl_config |= NVME_CC_ENABLE; |
| 1347 | writel(dev->ctrl_config, &dev->bar->cc); |
| 1348 | |
Matthew Wilcox | ba47e38 | 2013-05-04 06:43:16 -0400 | [diff] [blame] | 1349 | return nvme_wait_ready(dev, cap, true); |
| 1350 | } |
| 1351 | |
Keith Busch | 1894d8f | 2013-07-15 15:02:22 -0600 | [diff] [blame] | 1352 | static int nvme_shutdown_ctrl(struct nvme_dev *dev) |
| 1353 | { |
| 1354 | unsigned long timeout; |
Keith Busch | 1894d8f | 2013-07-15 15:02:22 -0600 | [diff] [blame] | 1355 | |
Dan McLeran | 0107952 | 2014-06-23 08:24:36 -0600 | [diff] [blame] | 1356 | dev->ctrl_config &= ~NVME_CC_SHN_MASK; |
| 1357 | dev->ctrl_config |= NVME_CC_SHN_NORMAL; |
| 1358 | |
| 1359 | writel(dev->ctrl_config, &dev->bar->cc); |
Keith Busch | 1894d8f | 2013-07-15 15:02:22 -0600 | [diff] [blame] | 1360 | |
Dan McLeran | 2484f40 | 2014-07-01 09:33:32 -0600 | [diff] [blame] | 1361 | timeout = SHUTDOWN_TIMEOUT + jiffies; |
Keith Busch | 1894d8f | 2013-07-15 15:02:22 -0600 | [diff] [blame] | 1362 | while ((readl(&dev->bar->csts) & NVME_CSTS_SHST_MASK) != |
| 1363 | NVME_CSTS_SHST_CMPLT) { |
| 1364 | msleep(100); |
| 1365 | if (fatal_signal_pending(current)) |
| 1366 | return -EINTR; |
| 1367 | if (time_after(jiffies, timeout)) { |
| 1368 | dev_err(&dev->pci_dev->dev, |
| 1369 | "Device shutdown incomplete; abort shutdown\n"); |
| 1370 | return -ENODEV; |
| 1371 | } |
| 1372 | } |
| 1373 | |
| 1374 | return 0; |
| 1375 | } |
| 1376 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1377 | static struct blk_mq_ops nvme_mq_admin_ops = { |
| 1378 | .queue_rq = nvme_admin_queue_rq, |
| 1379 | .map_queue = blk_mq_map_queue, |
| 1380 | .init_hctx = nvme_admin_init_hctx, |
Jens Axboe | 2c30540 | 2014-11-14 09:47:32 -0700 | [diff] [blame] | 1381 | .exit_hctx = nvme_exit_hctx, |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1382 | .init_request = nvme_admin_init_request, |
| 1383 | .timeout = nvme_timeout, |
| 1384 | }; |
| 1385 | |
| 1386 | static struct blk_mq_ops nvme_mq_ops = { |
| 1387 | .queue_rq = nvme_queue_rq, |
| 1388 | .map_queue = blk_mq_map_queue, |
| 1389 | .init_hctx = nvme_init_hctx, |
Jens Axboe | 2c30540 | 2014-11-14 09:47:32 -0700 | [diff] [blame] | 1390 | .exit_hctx = nvme_exit_hctx, |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1391 | .init_request = nvme_init_request, |
| 1392 | .timeout = nvme_timeout, |
| 1393 | }; |
| 1394 | |
Keith Busch | ea191d2 | 2015-01-07 18:55:49 -0700 | [diff] [blame] | 1395 | static void nvme_dev_remove_admin(struct nvme_dev *dev) |
| 1396 | { |
| 1397 | if (dev->admin_q && !blk_queue_dying(dev->admin_q)) { |
| 1398 | blk_cleanup_queue(dev->admin_q); |
| 1399 | blk_mq_free_tag_set(&dev->admin_tagset); |
| 1400 | } |
| 1401 | } |
| 1402 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1403 | static int nvme_alloc_admin_tags(struct nvme_dev *dev) |
| 1404 | { |
| 1405 | if (!dev->admin_q) { |
| 1406 | dev->admin_tagset.ops = &nvme_mq_admin_ops; |
| 1407 | dev->admin_tagset.nr_hw_queues = 1; |
| 1408 | dev->admin_tagset.queue_depth = NVME_AQ_DEPTH - 1; |
| 1409 | dev->admin_tagset.timeout = ADMIN_TIMEOUT; |
| 1410 | dev->admin_tagset.numa_node = dev_to_node(&dev->pci_dev->dev); |
| 1411 | dev->admin_tagset.cmd_size = sizeof(struct nvme_cmd_info); |
| 1412 | dev->admin_tagset.driver_data = dev; |
| 1413 | |
| 1414 | if (blk_mq_alloc_tag_set(&dev->admin_tagset)) |
| 1415 | return -ENOMEM; |
| 1416 | |
| 1417 | dev->admin_q = blk_mq_init_queue(&dev->admin_tagset); |
Ming Lei | 35b489d | 2015-01-02 14:25:27 +0000 | [diff] [blame] | 1418 | if (IS_ERR(dev->admin_q)) { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1419 | blk_mq_free_tag_set(&dev->admin_tagset); |
| 1420 | return -ENOMEM; |
| 1421 | } |
Keith Busch | ea191d2 | 2015-01-07 18:55:49 -0700 | [diff] [blame] | 1422 | if (!blk_get_queue(dev->admin_q)) { |
| 1423 | nvme_dev_remove_admin(dev); |
| 1424 | return -ENODEV; |
| 1425 | } |
Keith Busch | 0fb59cb | 2015-01-07 18:55:50 -0700 | [diff] [blame] | 1426 | } else |
| 1427 | blk_mq_unfreeze_queue(dev->admin_q); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1428 | |
| 1429 | return 0; |
| 1430 | } |
| 1431 | |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 1432 | static int nvme_configure_admin_queue(struct nvme_dev *dev) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1433 | { |
Matthew Wilcox | ba47e38 | 2013-05-04 06:43:16 -0400 | [diff] [blame] | 1434 | int result; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1435 | u32 aqa; |
Matthew Wilcox | ba47e38 | 2013-05-04 06:43:16 -0400 | [diff] [blame] | 1436 | u64 cap = readq(&dev->bar->cap); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1437 | struct nvme_queue *nvmeq; |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 1438 | unsigned page_shift = PAGE_SHIFT; |
| 1439 | unsigned dev_page_min = NVME_CAP_MPSMIN(cap) + 12; |
| 1440 | unsigned dev_page_max = NVME_CAP_MPSMAX(cap) + 12; |
| 1441 | |
| 1442 | if (page_shift < dev_page_min) { |
| 1443 | dev_err(&dev->pci_dev->dev, |
| 1444 | "Minimum device page size (%u) too large for " |
| 1445 | "host (%u)\n", 1 << dev_page_min, |
| 1446 | 1 << page_shift); |
| 1447 | return -ENODEV; |
| 1448 | } |
| 1449 | if (page_shift > dev_page_max) { |
| 1450 | dev_info(&dev->pci_dev->dev, |
| 1451 | "Device maximum page size (%u) smaller than " |
| 1452 | "host (%u); enabling work-around\n", |
| 1453 | 1 << dev_page_max, 1 << page_shift); |
| 1454 | page_shift = dev_page_max; |
| 1455 | } |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1456 | |
Matthew Wilcox | ba47e38 | 2013-05-04 06:43:16 -0400 | [diff] [blame] | 1457 | result = nvme_disable_ctrl(dev, cap); |
| 1458 | if (result < 0) |
| 1459 | return result; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1460 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1461 | nvmeq = dev->queues[0]; |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 1462 | if (!nvmeq) { |
Keith Busch | 2b25d98 | 2014-12-22 12:59:04 -0700 | [diff] [blame] | 1463 | nvmeq = nvme_alloc_queue(dev, 0, NVME_AQ_DEPTH); |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 1464 | if (!nvmeq) |
| 1465 | return -ENOMEM; |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 1466 | } |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1467 | |
| 1468 | aqa = nvmeq->q_depth - 1; |
| 1469 | aqa |= aqa << 16; |
| 1470 | |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 1471 | dev->page_size = 1 << page_shift; |
| 1472 | |
Dan McLeran | 0107952 | 2014-06-23 08:24:36 -0600 | [diff] [blame] | 1473 | dev->ctrl_config = NVME_CC_CSS_NVM; |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 1474 | dev->ctrl_config |= (page_shift - 12) << NVME_CC_MPS_SHIFT; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1475 | dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; |
Matthew Wilcox | 7f53f9d | 2011-03-22 15:55:45 -0400 | [diff] [blame] | 1476 | dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1477 | |
| 1478 | writel(aqa, &dev->bar->aqa); |
| 1479 | writeq(nvmeq->sq_dma_addr, &dev->bar->asq); |
| 1480 | writeq(nvmeq->cq_dma_addr, &dev->bar->acq); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1481 | |
Matthew Wilcox | ba47e38 | 2013-05-04 06:43:16 -0400 | [diff] [blame] | 1482 | result = nvme_enable_ctrl(dev, cap); |
Keith Busch | 025c557 | 2013-05-01 13:07:51 -0600 | [diff] [blame] | 1483 | if (result) |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1484 | goto free_nvmeq; |
| 1485 | |
Keith Busch | 2b25d98 | 2014-12-22 12:59:04 -0700 | [diff] [blame] | 1486 | nvmeq->cq_vector = 0; |
Matthew Wilcox | 3193f07 | 2014-01-27 15:57:22 -0500 | [diff] [blame] | 1487 | result = queue_request_irq(dev, nvmeq, nvmeq->irqname); |
Keith Busch | 025c557 | 2013-05-01 13:07:51 -0600 | [diff] [blame] | 1488 | if (result) |
Keith Busch | 0fb59cb | 2015-01-07 18:55:50 -0700 | [diff] [blame] | 1489 | goto free_nvmeq; |
Keith Busch | 025c557 | 2013-05-01 13:07:51 -0600 | [diff] [blame] | 1490 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1491 | return result; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1492 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1493 | free_nvmeq: |
| 1494 | nvme_free_queues(dev, 0); |
| 1495 | return result; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1496 | } |
| 1497 | |
Vishal Verma | 5d0f613 | 2013-03-04 18:40:58 -0700 | [diff] [blame] | 1498 | struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1499 | unsigned long addr, unsigned length) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1500 | { |
Matthew Wilcox | 36c14ed | 2011-01-24 07:52:07 -0500 | [diff] [blame] | 1501 | int i, err, count, nents, offset; |
Matthew Wilcox | 7fc3cda | 2011-01-26 17:05:50 -0500 | [diff] [blame] | 1502 | struct scatterlist *sg; |
| 1503 | struct page **pages; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1504 | struct nvme_iod *iod; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1505 | |
Matthew Wilcox | 36c14ed | 2011-01-24 07:52:07 -0500 | [diff] [blame] | 1506 | if (addr & 3) |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1507 | return ERR_PTR(-EINVAL); |
Dan Carpenter | 5460fc0 | 2013-05-13 17:59:50 +0300 | [diff] [blame] | 1508 | if (!length || length > INT_MAX - PAGE_SIZE) |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1509 | return ERR_PTR(-EINVAL); |
Matthew Wilcox | 7fc3cda | 2011-01-26 17:05:50 -0500 | [diff] [blame] | 1510 | |
Matthew Wilcox | 36c14ed | 2011-01-24 07:52:07 -0500 | [diff] [blame] | 1511 | offset = offset_in_page(addr); |
Matthew Wilcox | 7fc3cda | 2011-01-26 17:05:50 -0500 | [diff] [blame] | 1512 | count = DIV_ROUND_UP(offset + length, PAGE_SIZE); |
| 1513 | pages = kcalloc(count, sizeof(*pages), GFP_KERNEL); |
Dan Carpenter | 22fff82 | 2012-01-20 07:55:30 -0500 | [diff] [blame] | 1514 | if (!pages) |
| 1515 | return ERR_PTR(-ENOMEM); |
Matthew Wilcox | 36c14ed | 2011-01-24 07:52:07 -0500 | [diff] [blame] | 1516 | |
| 1517 | err = get_user_pages_fast(addr, count, 1, pages); |
| 1518 | if (err < count) { |
| 1519 | count = err; |
| 1520 | err = -EFAULT; |
| 1521 | goto put_pages; |
| 1522 | } |
Matthew Wilcox | 7fc3cda | 2011-01-26 17:05:50 -0500 | [diff] [blame] | 1523 | |
Santosh Y | 6808c5f | 2014-05-29 10:01:52 +0530 | [diff] [blame] | 1524 | err = -ENOMEM; |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 1525 | iod = nvme_alloc_iod(count, length, dev, GFP_KERNEL); |
Santosh Y | 6808c5f | 2014-05-29 10:01:52 +0530 | [diff] [blame] | 1526 | if (!iod) |
| 1527 | goto put_pages; |
| 1528 | |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1529 | sg = iod->sg; |
Matthew Wilcox | 36c14ed | 2011-01-24 07:52:07 -0500 | [diff] [blame] | 1530 | sg_init_table(sg, count); |
Matthew Wilcox | d0ba1e4 | 2011-09-13 17:01:39 -0400 | [diff] [blame] | 1531 | for (i = 0; i < count; i++) { |
| 1532 | sg_set_page(&sg[i], pages[i], |
Dan Carpenter | 5460fc0 | 2013-05-13 17:59:50 +0300 | [diff] [blame] | 1533 | min_t(unsigned, length, PAGE_SIZE - offset), |
| 1534 | offset); |
Matthew Wilcox | d0ba1e4 | 2011-09-13 17:01:39 -0400 | [diff] [blame] | 1535 | length -= (PAGE_SIZE - offset); |
| 1536 | offset = 0; |
Matthew Wilcox | 7fc3cda | 2011-01-26 17:05:50 -0500 | [diff] [blame] | 1537 | } |
Matthew Wilcox | fe304c4 | 2012-01-06 13:49:25 -0700 | [diff] [blame] | 1538 | sg_mark_end(&sg[i - 1]); |
Matthew Wilcox | 1c2ad9f | 2012-01-06 13:52:56 -0700 | [diff] [blame] | 1539 | iod->nents = count; |
Matthew Wilcox | 7fc3cda | 2011-01-26 17:05:50 -0500 | [diff] [blame] | 1540 | |
Matthew Wilcox | 7fc3cda | 2011-01-26 17:05:50 -0500 | [diff] [blame] | 1541 | nents = dma_map_sg(&dev->pci_dev->dev, sg, count, |
| 1542 | write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
Matthew Wilcox | 36c14ed | 2011-01-24 07:52:07 -0500 | [diff] [blame] | 1543 | if (!nents) |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1544 | goto free_iod; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1545 | |
Matthew Wilcox | 7fc3cda | 2011-01-26 17:05:50 -0500 | [diff] [blame] | 1546 | kfree(pages); |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1547 | return iod; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1548 | |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1549 | free_iod: |
| 1550 | kfree(iod); |
Matthew Wilcox | 36c14ed | 2011-01-24 07:52:07 -0500 | [diff] [blame] | 1551 | put_pages: |
| 1552 | for (i = 0; i < count; i++) |
| 1553 | put_page(pages[i]); |
Matthew Wilcox | 7fc3cda | 2011-01-26 17:05:50 -0500 | [diff] [blame] | 1554 | kfree(pages); |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1555 | return ERR_PTR(err); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1556 | } |
| 1557 | |
Vishal Verma | 5d0f613 | 2013-03-04 18:40:58 -0700 | [diff] [blame] | 1558 | void nvme_unmap_user_pages(struct nvme_dev *dev, int write, |
Matthew Wilcox | 1c2ad9f | 2012-01-06 13:52:56 -0700 | [diff] [blame] | 1559 | struct nvme_iod *iod) |
Matthew Wilcox | 7fc3cda | 2011-01-26 17:05:50 -0500 | [diff] [blame] | 1560 | { |
Matthew Wilcox | 1c2ad9f | 2012-01-06 13:52:56 -0700 | [diff] [blame] | 1561 | int i; |
Matthew Wilcox | 7fc3cda | 2011-01-26 17:05:50 -0500 | [diff] [blame] | 1562 | |
Matthew Wilcox | 1c2ad9f | 2012-01-06 13:52:56 -0700 | [diff] [blame] | 1563 | dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, |
| 1564 | write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
Matthew Wilcox | 7fc3cda | 2011-01-26 17:05:50 -0500 | [diff] [blame] | 1565 | |
Matthew Wilcox | 1c2ad9f | 2012-01-06 13:52:56 -0700 | [diff] [blame] | 1566 | for (i = 0; i < iod->nents; i++) |
| 1567 | put_page(sg_page(&iod->sg[i])); |
Matthew Wilcox | 7fc3cda | 2011-01-26 17:05:50 -0500 | [diff] [blame] | 1568 | } |
| 1569 | |
Matthew Wilcox | a53295b | 2011-02-01 16:13:29 -0500 | [diff] [blame] | 1570 | static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) |
| 1571 | { |
| 1572 | struct nvme_dev *dev = ns->dev; |
Matthew Wilcox | a53295b | 2011-02-01 16:13:29 -0500 | [diff] [blame] | 1573 | struct nvme_user_io io; |
| 1574 | struct nvme_command c; |
Keith Busch | f410c68 | 2013-04-23 17:23:59 -0600 | [diff] [blame] | 1575 | unsigned length, meta_len; |
| 1576 | int status, i; |
| 1577 | struct nvme_iod *iod, *meta_iod = NULL; |
| 1578 | dma_addr_t meta_dma_addr; |
| 1579 | void *meta, *uninitialized_var(meta_mem); |
Matthew Wilcox | a53295b | 2011-02-01 16:13:29 -0500 | [diff] [blame] | 1580 | |
| 1581 | if (copy_from_user(&io, uio, sizeof(io))) |
| 1582 | return -EFAULT; |
Matthew Wilcox | 6c7d494 | 2011-03-21 09:48:57 -0400 | [diff] [blame] | 1583 | length = (io.nblocks + 1) << ns->lba_shift; |
Keith Busch | f410c68 | 2013-04-23 17:23:59 -0600 | [diff] [blame] | 1584 | meta_len = (io.nblocks + 1) * ns->ms; |
| 1585 | |
| 1586 | if (meta_len && ((io.metadata & 3) || !io.metadata)) |
| 1587 | return -EINVAL; |
Matthew Wilcox | 6c7d494 | 2011-03-21 09:48:57 -0400 | [diff] [blame] | 1588 | |
| 1589 | switch (io.opcode) { |
| 1590 | case nvme_cmd_write: |
| 1591 | case nvme_cmd_read: |
Matthew Wilcox | 6bbf1ac | 2011-05-20 13:03:42 -0400 | [diff] [blame] | 1592 | case nvme_cmd_compare: |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1593 | iod = nvme_map_user_pages(dev, io.opcode & 1, io.addr, length); |
Matthew Wilcox | 6413214 | 2011-08-09 12:56:37 -0400 | [diff] [blame] | 1594 | break; |
Matthew Wilcox | 6c7d494 | 2011-03-21 09:48:57 -0400 | [diff] [blame] | 1595 | default: |
Matthew Wilcox | 6bbf1ac | 2011-05-20 13:03:42 -0400 | [diff] [blame] | 1596 | return -EINVAL; |
Matthew Wilcox | 6c7d494 | 2011-03-21 09:48:57 -0400 | [diff] [blame] | 1597 | } |
| 1598 | |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1599 | if (IS_ERR(iod)) |
| 1600 | return PTR_ERR(iod); |
Matthew Wilcox | a53295b | 2011-02-01 16:13:29 -0500 | [diff] [blame] | 1601 | |
| 1602 | memset(&c, 0, sizeof(c)); |
| 1603 | c.rw.opcode = io.opcode; |
| 1604 | c.rw.flags = io.flags; |
Matthew Wilcox | 6c7d494 | 2011-03-21 09:48:57 -0400 | [diff] [blame] | 1605 | c.rw.nsid = cpu_to_le32(ns->ns_id); |
Matthew Wilcox | a53295b | 2011-02-01 16:13:29 -0500 | [diff] [blame] | 1606 | c.rw.slba = cpu_to_le64(io.slba); |
Matthew Wilcox | 6c7d494 | 2011-03-21 09:48:57 -0400 | [diff] [blame] | 1607 | c.rw.length = cpu_to_le16(io.nblocks); |
Matthew Wilcox | a53295b | 2011-02-01 16:13:29 -0500 | [diff] [blame] | 1608 | c.rw.control = cpu_to_le16(io.control); |
Matthew Wilcox | 1c9b526 | 2013-04-16 15:21:06 -0400 | [diff] [blame] | 1609 | c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); |
| 1610 | c.rw.reftag = cpu_to_le32(io.reftag); |
| 1611 | c.rw.apptag = cpu_to_le16(io.apptag); |
| 1612 | c.rw.appmask = cpu_to_le16(io.appmask); |
Keith Busch | f410c68 | 2013-04-23 17:23:59 -0600 | [diff] [blame] | 1613 | |
| 1614 | if (meta_len) { |
Keith Busch | 1b56749 | 2013-07-18 12:13:51 -0600 | [diff] [blame] | 1615 | meta_iod = nvme_map_user_pages(dev, io.opcode & 1, io.metadata, |
| 1616 | meta_len); |
Keith Busch | f410c68 | 2013-04-23 17:23:59 -0600 | [diff] [blame] | 1617 | if (IS_ERR(meta_iod)) { |
| 1618 | status = PTR_ERR(meta_iod); |
| 1619 | meta_iod = NULL; |
| 1620 | goto unmap; |
| 1621 | } |
| 1622 | |
| 1623 | meta_mem = dma_alloc_coherent(&dev->pci_dev->dev, meta_len, |
| 1624 | &meta_dma_addr, GFP_KERNEL); |
| 1625 | if (!meta_mem) { |
| 1626 | status = -ENOMEM; |
| 1627 | goto unmap; |
| 1628 | } |
| 1629 | |
| 1630 | if (io.opcode & 1) { |
| 1631 | int meta_offset = 0; |
| 1632 | |
| 1633 | for (i = 0; i < meta_iod->nents; i++) { |
| 1634 | meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + |
| 1635 | meta_iod->sg[i].offset; |
| 1636 | memcpy(meta_mem + meta_offset, meta, |
| 1637 | meta_iod->sg[i].length); |
| 1638 | kunmap_atomic(meta); |
| 1639 | meta_offset += meta_iod->sg[i].length; |
| 1640 | } |
| 1641 | } |
| 1642 | |
| 1643 | c.rw.metadata = cpu_to_le64(meta_dma_addr); |
| 1644 | } |
| 1645 | |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 1646 | length = nvme_setup_prps(dev, iod, length, GFP_KERNEL); |
| 1647 | c.rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); |
| 1648 | c.rw.prp2 = cpu_to_le64(iod->first_dma); |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 1649 | |
Matthew Wilcox | b77954c | 2011-05-12 13:51:41 -0400 | [diff] [blame] | 1650 | if (length != (io.nblocks + 1) << ns->lba_shift) |
| 1651 | status = -ENOMEM; |
| 1652 | else |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1653 | status = nvme_submit_io_cmd(dev, ns, &c, NULL); |
Matthew Wilcox | a53295b | 2011-02-01 16:13:29 -0500 | [diff] [blame] | 1654 | |
Keith Busch | f410c68 | 2013-04-23 17:23:59 -0600 | [diff] [blame] | 1655 | if (meta_len) { |
| 1656 | if (status == NVME_SC_SUCCESS && !(io.opcode & 1)) { |
| 1657 | int meta_offset = 0; |
| 1658 | |
| 1659 | for (i = 0; i < meta_iod->nents; i++) { |
| 1660 | meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + |
| 1661 | meta_iod->sg[i].offset; |
| 1662 | memcpy(meta, meta_mem + meta_offset, |
| 1663 | meta_iod->sg[i].length); |
| 1664 | kunmap_atomic(meta); |
| 1665 | meta_offset += meta_iod->sg[i].length; |
| 1666 | } |
| 1667 | } |
| 1668 | |
| 1669 | dma_free_coherent(&dev->pci_dev->dev, meta_len, meta_mem, |
| 1670 | meta_dma_addr); |
| 1671 | } |
| 1672 | |
| 1673 | unmap: |
Matthew Wilcox | 1c2ad9f | 2012-01-06 13:52:56 -0700 | [diff] [blame] | 1674 | nvme_unmap_user_pages(dev, io.opcode & 1, iod); |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1675 | nvme_free_iod(dev, iod); |
Keith Busch | f410c68 | 2013-04-23 17:23:59 -0600 | [diff] [blame] | 1676 | |
| 1677 | if (meta_iod) { |
| 1678 | nvme_unmap_user_pages(dev, io.opcode & 1, meta_iod); |
| 1679 | nvme_free_iod(dev, meta_iod); |
| 1680 | } |
| 1681 | |
Matthew Wilcox | a53295b | 2011-02-01 16:13:29 -0500 | [diff] [blame] | 1682 | return status; |
| 1683 | } |
| 1684 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1685 | static int nvme_user_cmd(struct nvme_dev *dev, struct nvme_ns *ns, |
| 1686 | struct nvme_passthru_cmd __user *ucmd) |
Matthew Wilcox | 6ee44cd | 2011-02-03 10:58:26 -0500 | [diff] [blame] | 1687 | { |
Keith Busch | 7963e52 | 2014-09-12 16:07:20 -0600 | [diff] [blame] | 1688 | struct nvme_passthru_cmd cmd; |
Matthew Wilcox | 6ee44cd | 2011-02-03 10:58:26 -0500 | [diff] [blame] | 1689 | struct nvme_command c; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1690 | int status, length; |
Keith Busch | c7d36ab | 2012-07-27 11:53:28 -0600 | [diff] [blame] | 1691 | struct nvme_iod *uninitialized_var(iod); |
Keith Busch | 94f370c | 2013-05-09 14:01:38 -0600 | [diff] [blame] | 1692 | unsigned timeout; |
Matthew Wilcox | 6ee44cd | 2011-02-03 10:58:26 -0500 | [diff] [blame] | 1693 | |
Matthew Wilcox | 6bbf1ac | 2011-05-20 13:03:42 -0400 | [diff] [blame] | 1694 | if (!capable(CAP_SYS_ADMIN)) |
| 1695 | return -EACCES; |
| 1696 | if (copy_from_user(&cmd, ucmd, sizeof(cmd))) |
Matthew Wilcox | 6ee44cd | 2011-02-03 10:58:26 -0500 | [diff] [blame] | 1697 | return -EFAULT; |
Matthew Wilcox | 6ee44cd | 2011-02-03 10:58:26 -0500 | [diff] [blame] | 1698 | |
| 1699 | memset(&c, 0, sizeof(c)); |
Matthew Wilcox | 6bbf1ac | 2011-05-20 13:03:42 -0400 | [diff] [blame] | 1700 | c.common.opcode = cmd.opcode; |
| 1701 | c.common.flags = cmd.flags; |
| 1702 | c.common.nsid = cpu_to_le32(cmd.nsid); |
| 1703 | c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); |
| 1704 | c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); |
| 1705 | c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); |
| 1706 | c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); |
| 1707 | c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); |
| 1708 | c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); |
| 1709 | c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); |
| 1710 | c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); |
| 1711 | |
| 1712 | length = cmd.data_len; |
| 1713 | if (cmd.data_len) { |
Matthew Wilcox | 4974218 | 2012-01-06 13:42:45 -0700 | [diff] [blame] | 1714 | iod = nvme_map_user_pages(dev, cmd.opcode & 1, cmd.addr, |
| 1715 | length); |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1716 | if (IS_ERR(iod)) |
| 1717 | return PTR_ERR(iod); |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 1718 | length = nvme_setup_prps(dev, iod, length, GFP_KERNEL); |
| 1719 | c.common.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); |
| 1720 | c.common.prp2 = cpu_to_le64(iod->first_dma); |
Matthew Wilcox | 6bbf1ac | 2011-05-20 13:03:42 -0400 | [diff] [blame] | 1721 | } |
| 1722 | |
Keith Busch | 94f370c | 2013-05-09 14:01:38 -0600 | [diff] [blame] | 1723 | timeout = cmd.timeout_ms ? msecs_to_jiffies(cmd.timeout_ms) : |
| 1724 | ADMIN_TIMEOUT; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1725 | |
Matthew Wilcox | 6bbf1ac | 2011-05-20 13:03:42 -0400 | [diff] [blame] | 1726 | if (length != cmd.data_len) |
Matthew Wilcox | b77954c | 2011-05-12 13:51:41 -0400 | [diff] [blame] | 1727 | status = -ENOMEM; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1728 | else if (ns) { |
| 1729 | struct request *req; |
| 1730 | |
| 1731 | req = blk_mq_alloc_request(ns->queue, WRITE, |
| 1732 | (GFP_KERNEL|__GFP_WAIT), false); |
Jens Axboe | 97fe383 | 2014-12-10 13:02:44 -0700 | [diff] [blame] | 1733 | if (IS_ERR(req)) |
| 1734 | status = PTR_ERR(req); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1735 | else { |
| 1736 | status = nvme_submit_sync_cmd(req, &c, &cmd.result, |
| 1737 | timeout); |
Jens Axboe | 9d135bb | 2014-11-17 10:43:42 -0700 | [diff] [blame] | 1738 | blk_mq_free_request(req); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1739 | } |
| 1740 | } else |
| 1741 | status = __nvme_submit_admin_cmd(dev, &c, &cmd.result, timeout); |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1742 | |
Matthew Wilcox | 6bbf1ac | 2011-05-20 13:03:42 -0400 | [diff] [blame] | 1743 | if (cmd.data_len) { |
Matthew Wilcox | 1c2ad9f | 2012-01-06 13:52:56 -0700 | [diff] [blame] | 1744 | nvme_unmap_user_pages(dev, cmd.opcode & 1, iod); |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 1745 | nvme_free_iod(dev, iod); |
Matthew Wilcox | 6bbf1ac | 2011-05-20 13:03:42 -0400 | [diff] [blame] | 1746 | } |
Keith Busch | f4f117f | 2012-09-21 10:49:05 -0600 | [diff] [blame] | 1747 | |
Chayan Biswas | cf90bc4 | 2013-05-22 22:34:49 +0000 | [diff] [blame] | 1748 | if ((status >= 0) && copy_to_user(&ucmd->result, &cmd.result, |
Keith Busch | f4f117f | 2012-09-21 10:49:05 -0600 | [diff] [blame] | 1749 | sizeof(cmd.result))) |
| 1750 | status = -EFAULT; |
| 1751 | |
Matthew Wilcox | 6ee44cd | 2011-02-03 10:58:26 -0500 | [diff] [blame] | 1752 | return status; |
| 1753 | } |
| 1754 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1755 | static int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, |
| 1756 | unsigned long arg) |
| 1757 | { |
| 1758 | struct nvme_ns *ns = bdev->bd_disk->private_data; |
| 1759 | |
| 1760 | switch (cmd) { |
Matthew Wilcox | 6bbf1ac | 2011-05-20 13:03:42 -0400 | [diff] [blame] | 1761 | case NVME_IOCTL_ID: |
Matthew Wilcox | c3bfe71 | 2013-07-08 17:26:25 -0400 | [diff] [blame] | 1762 | force_successful_syscall_return(); |
Matthew Wilcox | 6bbf1ac | 2011-05-20 13:03:42 -0400 | [diff] [blame] | 1763 | return ns->ns_id; |
| 1764 | case NVME_IOCTL_ADMIN_CMD: |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1765 | return nvme_user_cmd(ns->dev, NULL, (void __user *)arg); |
Keith Busch | 7963e52 | 2014-09-12 16:07:20 -0600 | [diff] [blame] | 1766 | case NVME_IOCTL_IO_CMD: |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1767 | return nvme_user_cmd(ns->dev, ns, (void __user *)arg); |
Matthew Wilcox | a53295b | 2011-02-01 16:13:29 -0500 | [diff] [blame] | 1768 | case NVME_IOCTL_SUBMIT_IO: |
| 1769 | return nvme_submit_io(ns, (void __user *)arg); |
Vishal Verma | 5d0f613 | 2013-03-04 18:40:58 -0700 | [diff] [blame] | 1770 | case SG_GET_VERSION_NUM: |
| 1771 | return nvme_sg_get_version_num((void __user *)arg); |
| 1772 | case SG_IO: |
| 1773 | return nvme_sg_io(ns, (void __user *)arg); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1774 | default: |
| 1775 | return -ENOTTY; |
| 1776 | } |
| 1777 | } |
| 1778 | |
Keith Busch | 320a382 | 2013-10-23 13:07:34 -0600 | [diff] [blame] | 1779 | #ifdef CONFIG_COMPAT |
| 1780 | static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, |
| 1781 | unsigned int cmd, unsigned long arg) |
| 1782 | { |
Keith Busch | 320a382 | 2013-10-23 13:07:34 -0600 | [diff] [blame] | 1783 | switch (cmd) { |
| 1784 | case SG_IO: |
Keith Busch | e179729 | 2014-08-27 13:55:38 -0600 | [diff] [blame] | 1785 | return -ENOIOCTLCMD; |
Keith Busch | 320a382 | 2013-10-23 13:07:34 -0600 | [diff] [blame] | 1786 | } |
| 1787 | return nvme_ioctl(bdev, mode, cmd, arg); |
| 1788 | } |
| 1789 | #else |
| 1790 | #define nvme_compat_ioctl NULL |
| 1791 | #endif |
| 1792 | |
Keith Busch | 9ac2709 | 2014-01-31 16:53:39 -0700 | [diff] [blame] | 1793 | static int nvme_open(struct block_device *bdev, fmode_t mode) |
| 1794 | { |
Keith Busch | 9e60352 | 2014-10-03 11:15:47 -0600 | [diff] [blame] | 1795 | int ret = 0; |
| 1796 | struct nvme_ns *ns; |
Keith Busch | 9ac2709 | 2014-01-31 16:53:39 -0700 | [diff] [blame] | 1797 | |
Keith Busch | 9e60352 | 2014-10-03 11:15:47 -0600 | [diff] [blame] | 1798 | spin_lock(&dev_list_lock); |
| 1799 | ns = bdev->bd_disk->private_data; |
| 1800 | if (!ns) |
| 1801 | ret = -ENXIO; |
| 1802 | else if (!kref_get_unless_zero(&ns->dev->kref)) |
| 1803 | ret = -ENXIO; |
| 1804 | spin_unlock(&dev_list_lock); |
| 1805 | |
| 1806 | return ret; |
Keith Busch | 9ac2709 | 2014-01-31 16:53:39 -0700 | [diff] [blame] | 1807 | } |
| 1808 | |
| 1809 | static void nvme_free_dev(struct kref *kref); |
| 1810 | |
| 1811 | static void nvme_release(struct gendisk *disk, fmode_t mode) |
| 1812 | { |
| 1813 | struct nvme_ns *ns = disk->private_data; |
| 1814 | struct nvme_dev *dev = ns->dev; |
| 1815 | |
| 1816 | kref_put(&dev->kref, nvme_free_dev); |
| 1817 | } |
| 1818 | |
Keith Busch | 4cc09e2 | 2014-04-02 15:45:37 -0600 | [diff] [blame] | 1819 | static int nvme_getgeo(struct block_device *bd, struct hd_geometry *geo) |
| 1820 | { |
| 1821 | /* some standard values */ |
| 1822 | geo->heads = 1 << 6; |
| 1823 | geo->sectors = 1 << 5; |
| 1824 | geo->cylinders = get_capacity(bd->bd_disk) >> 11; |
| 1825 | return 0; |
| 1826 | } |
| 1827 | |
Keith Busch | 1b9dbf7 | 2014-09-10 17:21:14 -0600 | [diff] [blame] | 1828 | static int nvme_revalidate_disk(struct gendisk *disk) |
| 1829 | { |
| 1830 | struct nvme_ns *ns = disk->private_data; |
| 1831 | struct nvme_dev *dev = ns->dev; |
| 1832 | struct nvme_id_ns *id; |
| 1833 | dma_addr_t dma_addr; |
| 1834 | int lbaf; |
| 1835 | |
| 1836 | id = dma_alloc_coherent(&dev->pci_dev->dev, 4096, &dma_addr, |
| 1837 | GFP_KERNEL); |
| 1838 | if (!id) { |
| 1839 | dev_warn(&dev->pci_dev->dev, "%s: Memory alocation failure\n", |
| 1840 | __func__); |
| 1841 | return 0; |
| 1842 | } |
| 1843 | |
| 1844 | if (nvme_identify(dev, ns->ns_id, 0, dma_addr)) |
| 1845 | goto free; |
| 1846 | |
| 1847 | lbaf = id->flbas & 0xf; |
| 1848 | ns->lba_shift = id->lbaf[lbaf].ds; |
| 1849 | |
| 1850 | blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); |
| 1851 | set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); |
| 1852 | free: |
| 1853 | dma_free_coherent(&dev->pci_dev->dev, 4096, id, dma_addr); |
| 1854 | return 0; |
| 1855 | } |
| 1856 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1857 | static const struct block_device_operations nvme_fops = { |
| 1858 | .owner = THIS_MODULE, |
| 1859 | .ioctl = nvme_ioctl, |
Keith Busch | 320a382 | 2013-10-23 13:07:34 -0600 | [diff] [blame] | 1860 | .compat_ioctl = nvme_compat_ioctl, |
Keith Busch | 9ac2709 | 2014-01-31 16:53:39 -0700 | [diff] [blame] | 1861 | .open = nvme_open, |
| 1862 | .release = nvme_release, |
Keith Busch | 4cc09e2 | 2014-04-02 15:45:37 -0600 | [diff] [blame] | 1863 | .getgeo = nvme_getgeo, |
Keith Busch | 1b9dbf7 | 2014-09-10 17:21:14 -0600 | [diff] [blame] | 1864 | .revalidate_disk= nvme_revalidate_disk, |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1865 | }; |
| 1866 | |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 1867 | static int nvme_kthread(void *data) |
| 1868 | { |
Keith Busch | d4b4ff8 | 2013-12-10 13:10:37 -0700 | [diff] [blame] | 1869 | struct nvme_dev *dev, *next; |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 1870 | |
| 1871 | while (!kthread_should_stop()) { |
Arjan van de Ven | 564a232 | 2013-05-01 16:38:23 -0400 | [diff] [blame] | 1872 | set_current_state(TASK_INTERRUPTIBLE); |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 1873 | spin_lock(&dev_list_lock); |
Keith Busch | d4b4ff8 | 2013-12-10 13:10:37 -0700 | [diff] [blame] | 1874 | list_for_each_entry_safe(dev, next, &dev_list, node) { |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 1875 | int i; |
Keith Busch | d4b4ff8 | 2013-12-10 13:10:37 -0700 | [diff] [blame] | 1876 | if (readl(&dev->bar->csts) & NVME_CSTS_CFS && |
| 1877 | dev->initialized) { |
| 1878 | if (work_busy(&dev->reset_work)) |
| 1879 | continue; |
| 1880 | list_del_init(&dev->node); |
| 1881 | dev_warn(&dev->pci_dev->dev, |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1882 | "Failed status: %x, reset controller\n", |
| 1883 | readl(&dev->bar->csts)); |
Tejun Heo | 9ca9737 | 2014-03-07 10:24:49 -0500 | [diff] [blame] | 1884 | dev->reset_workfn = nvme_reset_failed_dev; |
Keith Busch | d4b4ff8 | 2013-12-10 13:10:37 -0700 | [diff] [blame] | 1885 | queue_work(nvme_workq, &dev->reset_work); |
| 1886 | continue; |
| 1887 | } |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 1888 | for (i = 0; i < dev->queue_count; i++) { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1889 | struct nvme_queue *nvmeq = dev->queues[i]; |
Matthew Wilcox | 740216f | 2011-02-15 16:28:20 -0500 | [diff] [blame] | 1890 | if (!nvmeq) |
| 1891 | continue; |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 1892 | spin_lock_irq(&nvmeq->q_lock); |
Matthew Wilcox | bc57a0f | 2013-06-24 11:56:42 -0400 | [diff] [blame] | 1893 | nvme_process_cq(nvmeq); |
Keith Busch | 6fccf93 | 2014-06-18 13:58:57 -0600 | [diff] [blame] | 1894 | |
| 1895 | while ((i == 0) && (dev->event_limit > 0)) { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1896 | if (nvme_submit_async_admin_req(dev)) |
Keith Busch | 6fccf93 | 2014-06-18 13:58:57 -0600 | [diff] [blame] | 1897 | break; |
| 1898 | dev->event_limit--; |
| 1899 | } |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 1900 | spin_unlock_irq(&nvmeq->q_lock); |
| 1901 | } |
| 1902 | } |
| 1903 | spin_unlock(&dev_list_lock); |
Arjan van de Ven | acb7aa0 | 2013-02-04 14:44:33 -0800 | [diff] [blame] | 1904 | schedule_timeout(round_jiffies_relative(HZ)); |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 1905 | } |
| 1906 | return 0; |
| 1907 | } |
| 1908 | |
Keith Busch | 0e5e4f0 | 2012-11-09 16:33:05 -0700 | [diff] [blame] | 1909 | static void nvme_config_discard(struct nvme_ns *ns) |
| 1910 | { |
| 1911 | u32 logical_block_size = queue_logical_block_size(ns->queue); |
| 1912 | ns->queue->limits.discard_zeroes_data = 0; |
| 1913 | ns->queue->limits.discard_alignment = logical_block_size; |
| 1914 | ns->queue->limits.discard_granularity = logical_block_size; |
| 1915 | ns->queue->limits.max_discard_sectors = 0xffffffff; |
| 1916 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); |
| 1917 | } |
| 1918 | |
Matthew Wilcox | c3bfe71 | 2013-07-08 17:26:25 -0400 | [diff] [blame] | 1919 | static struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid, |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1920 | struct nvme_id_ns *id, struct nvme_lba_range_type *rt) |
| 1921 | { |
| 1922 | struct nvme_ns *ns; |
| 1923 | struct gendisk *disk; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1924 | int node = dev_to_node(&dev->pci_dev->dev); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1925 | int lbaf; |
| 1926 | |
| 1927 | if (rt->attributes & NVME_LBART_ATTRIB_HIDE) |
| 1928 | return NULL; |
| 1929 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1930 | ns = kzalloc_node(sizeof(*ns), GFP_KERNEL, node); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1931 | if (!ns) |
| 1932 | return NULL; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1933 | ns->queue = blk_mq_init_queue(&dev->tagset); |
Dan Carpenter | 9f173b3 | 2014-11-05 23:39:09 +0300 | [diff] [blame] | 1934 | if (IS_ERR(ns->queue)) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1935 | goto out_free_ns; |
Matthew Wilcox | 4eeb921 | 2012-01-10 14:35:08 -0700 | [diff] [blame] | 1936 | queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); |
| 1937 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1938 | queue_flag_set_unlocked(QUEUE_FLAG_SG_GAPS, ns->queue); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1939 | ns->dev = dev; |
| 1940 | ns->queue->queuedata = ns; |
| 1941 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1942 | disk = alloc_disk_node(0, node); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1943 | if (!disk) |
| 1944 | goto out_free_queue; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1945 | |
Matthew Wilcox | 5aff938 | 2011-05-06 08:45:47 -0400 | [diff] [blame] | 1946 | ns->ns_id = nsid; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1947 | ns->disk = disk; |
| 1948 | lbaf = id->flbas & 0xf; |
| 1949 | ns->lba_shift = id->lbaf[lbaf].ds; |
Keith Busch | f410c68 | 2013-04-23 17:23:59 -0600 | [diff] [blame] | 1950 | ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); |
Keith Busch | e9ef463 | 2012-07-24 15:01:04 -0600 | [diff] [blame] | 1951 | blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); |
Keith Busch | 8fc23e0 | 2012-07-26 11:29:57 -0600 | [diff] [blame] | 1952 | if (dev->max_hw_sectors) |
| 1953 | blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1954 | if (dev->stripe_size) |
| 1955 | blk_queue_chunk_sectors(ns->queue, dev->stripe_size >> 9); |
Keith Busch | a7d2ce2 | 2014-04-29 11:41:28 -0600 | [diff] [blame] | 1956 | if (dev->vwc & NVME_CTRL_VWC_PRESENT) |
| 1957 | blk_queue_flush(ns->queue, REQ_FLUSH | REQ_FUA); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1958 | |
| 1959 | disk->major = nvme_major; |
Matthew Wilcox | 469071a | 2013-12-09 12:58:46 -0500 | [diff] [blame] | 1960 | disk->first_minor = 0; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1961 | disk->fops = &nvme_fops; |
| 1962 | disk->private_data = ns; |
| 1963 | disk->queue = ns->queue; |
Matthew Wilcox | 388f037 | 2011-02-01 12:49:38 -0500 | [diff] [blame] | 1964 | disk->driverfs_dev = &dev->pci_dev->dev; |
Matthew Wilcox | 469071a | 2013-12-09 12:58:46 -0500 | [diff] [blame] | 1965 | disk->flags = GENHD_FL_EXT_DEVT; |
Matthew Wilcox | 5aff938 | 2011-05-06 08:45:47 -0400 | [diff] [blame] | 1966 | sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1967 | set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); |
| 1968 | |
Keith Busch | 0e5e4f0 | 2012-11-09 16:33:05 -0700 | [diff] [blame] | 1969 | if (dev->oncs & NVME_CTRL_ONCS_DSM) |
| 1970 | nvme_config_discard(ns); |
| 1971 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1972 | return ns; |
| 1973 | |
| 1974 | out_free_queue: |
| 1975 | blk_cleanup_queue(ns->queue); |
| 1976 | out_free_ns: |
| 1977 | kfree(ns); |
| 1978 | return NULL; |
| 1979 | } |
| 1980 | |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 1981 | static void nvme_create_io_queues(struct nvme_dev *dev) |
| 1982 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1983 | unsigned i; |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 1984 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1985 | for (i = dev->queue_count; i <= dev->max_qid; i++) |
Keith Busch | 2b25d98 | 2014-12-22 12:59:04 -0700 | [diff] [blame] | 1986 | if (!nvme_alloc_queue(dev, i, dev->q_depth)) |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 1987 | break; |
| 1988 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1989 | for (i = dev->online_queues; i <= dev->queue_count - 1; i++) |
| 1990 | if (nvme_create_queue(dev->queues[i], i)) |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 1991 | break; |
| 1992 | } |
| 1993 | |
Matthew Wilcox | b3b0681 | 2011-01-20 09:14:34 -0500 | [diff] [blame] | 1994 | static int set_queue_count(struct nvme_dev *dev, int count) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1995 | { |
| 1996 | int status; |
| 1997 | u32 result; |
Matthew Wilcox | b3b0681 | 2011-01-20 09:14:34 -0500 | [diff] [blame] | 1998 | u32 q_count = (count - 1) | ((count - 1) << 16); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1999 | |
Matthew Wilcox | df34813 | 2012-01-11 07:29:56 -0700 | [diff] [blame] | 2000 | status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 2001 | &result); |
Matthew Wilcox | 27e8166 | 2014-04-11 11:58:45 -0400 | [diff] [blame] | 2002 | if (status < 0) |
| 2003 | return status; |
| 2004 | if (status > 0) { |
| 2005 | dev_err(&dev->pci_dev->dev, "Could not set queue count (%d)\n", |
| 2006 | status); |
Keith Busch | badc34d | 2014-06-23 14:25:35 -0600 | [diff] [blame] | 2007 | return 0; |
Matthew Wilcox | 27e8166 | 2014-04-11 11:58:45 -0400 | [diff] [blame] | 2008 | } |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2009 | return min(result & 0xffff, result >> 16) + 1; |
| 2010 | } |
| 2011 | |
Keith Busch | 9d713c2 | 2013-07-15 15:02:24 -0600 | [diff] [blame] | 2012 | static size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) |
| 2013 | { |
Haiyan Hu | b80d5cc | 2013-09-10 11:25:37 +0800 | [diff] [blame] | 2014 | return 4096 + ((nr_io_queues + 1) * 8 * dev->db_stride); |
Keith Busch | 9d713c2 | 2013-07-15 15:02:24 -0600 | [diff] [blame] | 2015 | } |
| 2016 | |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 2017 | static int nvme_setup_io_queues(struct nvme_dev *dev) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2018 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2019 | struct nvme_queue *adminq = dev->queues[0]; |
Ramachandra Rao Gajula | fa08a39 | 2013-05-11 15:19:31 -0700 | [diff] [blame] | 2020 | struct pci_dev *pdev = dev->pci_dev; |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 2021 | int result, i, vecs, nr_io_queues, size; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2022 | |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 2023 | nr_io_queues = num_possible_cpus(); |
Matthew Wilcox | b348b7d | 2011-02-15 16:16:02 -0500 | [diff] [blame] | 2024 | result = set_queue_count(dev, nr_io_queues); |
Keith Busch | badc34d | 2014-06-23 14:25:35 -0600 | [diff] [blame] | 2025 | if (result <= 0) |
Matthew Wilcox | 1b23484 | 2011-01-20 13:01:49 -0500 | [diff] [blame] | 2026 | return result; |
Matthew Wilcox | b348b7d | 2011-02-15 16:16:02 -0500 | [diff] [blame] | 2027 | if (result < nr_io_queues) |
| 2028 | nr_io_queues = result; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2029 | |
Keith Busch | 9d713c2 | 2013-07-15 15:02:24 -0600 | [diff] [blame] | 2030 | size = db_bar_size(dev, nr_io_queues); |
| 2031 | if (size > 8192) { |
Matthew Wilcox | f1938f6 | 2011-10-20 17:00:41 -0400 | [diff] [blame] | 2032 | iounmap(dev->bar); |
Keith Busch | 9d713c2 | 2013-07-15 15:02:24 -0600 | [diff] [blame] | 2033 | do { |
| 2034 | dev->bar = ioremap(pci_resource_start(pdev, 0), size); |
| 2035 | if (dev->bar) |
| 2036 | break; |
| 2037 | if (!--nr_io_queues) |
| 2038 | return -ENOMEM; |
| 2039 | size = db_bar_size(dev, nr_io_queues); |
| 2040 | } while (1); |
Matthew Wilcox | f1938f6 | 2011-10-20 17:00:41 -0400 | [diff] [blame] | 2041 | dev->dbs = ((void __iomem *)dev->bar) + 4096; |
Keith Busch | 5a92e70 | 2014-02-21 14:13:44 -0700 | [diff] [blame] | 2042 | adminq->q_db = dev->dbs; |
Matthew Wilcox | f1938f6 | 2011-10-20 17:00:41 -0400 | [diff] [blame] | 2043 | } |
| 2044 | |
Keith Busch | 9d713c2 | 2013-07-15 15:02:24 -0600 | [diff] [blame] | 2045 | /* Deregister the admin queue's interrupt */ |
Matthew Wilcox | 3193f07 | 2014-01-27 15:57:22 -0500 | [diff] [blame] | 2046 | free_irq(dev->entry[0].vector, adminq); |
Keith Busch | 9d713c2 | 2013-07-15 15:02:24 -0600 | [diff] [blame] | 2047 | |
Jens Axboe | e32efbf | 2014-11-14 09:49:26 -0700 | [diff] [blame] | 2048 | /* |
| 2049 | * If we enable msix early due to not intx, disable it again before |
| 2050 | * setting up the full range we need. |
| 2051 | */ |
| 2052 | if (!pdev->irq) |
| 2053 | pci_disable_msix(pdev); |
| 2054 | |
Alexander Gordeev | be577fa | 2014-03-04 16:22:00 +0100 | [diff] [blame] | 2055 | for (i = 0; i < nr_io_queues; i++) |
Matthew Wilcox | 1b23484 | 2011-01-20 13:01:49 -0500 | [diff] [blame] | 2056 | dev->entry[i].entry = i; |
Alexander Gordeev | be577fa | 2014-03-04 16:22:00 +0100 | [diff] [blame] | 2057 | vecs = pci_enable_msix_range(pdev, dev->entry, 1, nr_io_queues); |
| 2058 | if (vecs < 0) { |
| 2059 | vecs = pci_enable_msi_range(pdev, 1, min(nr_io_queues, 32)); |
| 2060 | if (vecs < 0) { |
| 2061 | vecs = 1; |
| 2062 | } else { |
| 2063 | for (i = 0; i < vecs; i++) |
| 2064 | dev->entry[i].vector = i + pdev->irq; |
Matthew Wilcox | 1b23484 | 2011-01-20 13:01:49 -0500 | [diff] [blame] | 2065 | } |
| 2066 | } |
| 2067 | |
Matthew Wilcox | 063a809 | 2013-06-20 10:53:48 -0400 | [diff] [blame] | 2068 | /* |
| 2069 | * Should investigate if there's a performance win from allocating |
| 2070 | * more queues than interrupt vectors; it might allow the submission |
| 2071 | * path to scale better, even if the receive path is limited by the |
| 2072 | * number of interrupts. |
| 2073 | */ |
| 2074 | nr_io_queues = vecs; |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 2075 | dev->max_qid = nr_io_queues; |
Ramachandra Rao Gajula | fa08a39 | 2013-05-11 15:19:31 -0700 | [diff] [blame] | 2076 | |
Matthew Wilcox | 3193f07 | 2014-01-27 15:57:22 -0500 | [diff] [blame] | 2077 | result = queue_request_irq(dev, adminq, adminq->irqname); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2078 | if (result) |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 2079 | goto free_queues; |
Matthew Wilcox | 1b23484 | 2011-01-20 13:01:49 -0500 | [diff] [blame] | 2080 | |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 2081 | /* Free previously allocated queues that are no longer usable */ |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 2082 | nvme_free_queues(dev, nr_io_queues + 1); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2083 | nvme_create_io_queues(dev); |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 2084 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2085 | return 0; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2086 | |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 2087 | free_queues: |
Keith Busch | a1a5ef9 | 2013-12-16 13:50:00 -0500 | [diff] [blame] | 2088 | nvme_free_queues(dev, 1); |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 2089 | return result; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2090 | } |
| 2091 | |
Matthew Wilcox | 422ef0c | 2013-04-16 11:22:36 -0400 | [diff] [blame] | 2092 | /* |
| 2093 | * Return: error value if an error occurred setting up the queues or calling |
| 2094 | * Identify Device. 0 if these succeeded, even if adding some of the |
| 2095 | * namespaces failed. At the moment, these failures are silent. TBD which |
| 2096 | * failures should be reported. |
| 2097 | */ |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 2098 | static int nvme_dev_add(struct nvme_dev *dev) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2099 | { |
Matthew Wilcox | 68608c26 | 2013-06-21 14:36:34 -0400 | [diff] [blame] | 2100 | struct pci_dev *pdev = dev->pci_dev; |
Matthew Wilcox | c3bfe71 | 2013-07-08 17:26:25 -0400 | [diff] [blame] | 2101 | int res; |
| 2102 | unsigned nn, i; |
Keith Busch | cbb6218 | 2013-05-01 13:07:49 -0600 | [diff] [blame] | 2103 | struct nvme_ns *ns; |
Matthew Wilcox | 5181423 | 2011-02-01 16:18:08 -0500 | [diff] [blame] | 2104 | struct nvme_id_ctrl *ctrl; |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 2105 | struct nvme_id_ns *id_ns; |
| 2106 | void *mem; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2107 | dma_addr_t dma_addr; |
Keith Busch | 159b67d | 2013-04-09 17:13:20 -0600 | [diff] [blame] | 2108 | int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2109 | |
Matthew Wilcox | 68608c26 | 2013-06-21 14:36:34 -0400 | [diff] [blame] | 2110 | mem = dma_alloc_coherent(&pdev->dev, 8192, &dma_addr, GFP_KERNEL); |
Keith Busch | a9ef434 | 2013-05-01 13:07:48 -0600 | [diff] [blame] | 2111 | if (!mem) |
| 2112 | return -ENOMEM; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2113 | |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 2114 | res = nvme_identify(dev, 0, 1, dma_addr); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2115 | if (res) { |
Matthew Wilcox | 27e8166 | 2014-04-11 11:58:45 -0400 | [diff] [blame] | 2116 | dev_err(&pdev->dev, "Identify Controller failed (%d)\n", res); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2117 | res = -EIO; |
Keith Busch | cbb6218 | 2013-05-01 13:07:49 -0600 | [diff] [blame] | 2118 | goto out; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2119 | } |
| 2120 | |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 2121 | ctrl = mem; |
Matthew Wilcox | 5181423 | 2011-02-01 16:18:08 -0500 | [diff] [blame] | 2122 | nn = le32_to_cpup(&ctrl->nn); |
Keith Busch | 0e5e4f0 | 2012-11-09 16:33:05 -0700 | [diff] [blame] | 2123 | dev->oncs = le16_to_cpup(&ctrl->oncs); |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 2124 | dev->abort_limit = ctrl->acl + 1; |
Keith Busch | a7d2ce2 | 2014-04-29 11:41:28 -0600 | [diff] [blame] | 2125 | dev->vwc = ctrl->vwc; |
Keith Busch | 6fccf93 | 2014-06-18 13:58:57 -0600 | [diff] [blame] | 2126 | dev->event_limit = min(ctrl->aerl + 1, 8); |
Matthew Wilcox | 5181423 | 2011-02-01 16:18:08 -0500 | [diff] [blame] | 2127 | memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); |
| 2128 | memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); |
| 2129 | memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); |
Keith Busch | 159b67d | 2013-04-09 17:13:20 -0600 | [diff] [blame] | 2130 | if (ctrl->mdts) |
Keith Busch | 8fc23e0 | 2012-07-26 11:29:57 -0600 | [diff] [blame] | 2131 | dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); |
Matthew Wilcox | 68608c26 | 2013-06-21 14:36:34 -0400 | [diff] [blame] | 2132 | if ((pdev->vendor == PCI_VENDOR_ID_INTEL) && |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2133 | (pdev->device == 0x0953) && ctrl->vs[3]) { |
| 2134 | unsigned int max_hw_sectors; |
| 2135 | |
Keith Busch | 159b67d | 2013-04-09 17:13:20 -0600 | [diff] [blame] | 2136 | dev->stripe_size = 1 << (ctrl->vs[3] + shift); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2137 | max_hw_sectors = dev->stripe_size >> (shift - 9); |
| 2138 | if (dev->max_hw_sectors) { |
| 2139 | dev->max_hw_sectors = min(max_hw_sectors, |
| 2140 | dev->max_hw_sectors); |
| 2141 | } else |
| 2142 | dev->max_hw_sectors = max_hw_sectors; |
| 2143 | } |
| 2144 | |
| 2145 | dev->tagset.ops = &nvme_mq_ops; |
| 2146 | dev->tagset.nr_hw_queues = dev->online_queues - 1; |
| 2147 | dev->tagset.timeout = NVME_IO_TIMEOUT; |
| 2148 | dev->tagset.numa_node = dev_to_node(&dev->pci_dev->dev); |
| 2149 | dev->tagset.queue_depth = |
| 2150 | min_t(int, dev->q_depth, BLK_MQ_MAX_DEPTH) - 1; |
| 2151 | dev->tagset.cmd_size = sizeof(struct nvme_cmd_info); |
| 2152 | dev->tagset.flags = BLK_MQ_F_SHOULD_MERGE; |
| 2153 | dev->tagset.driver_data = dev; |
| 2154 | |
| 2155 | if (blk_mq_alloc_tag_set(&dev->tagset)) |
| 2156 | goto out; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2157 | |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 2158 | id_ns = mem; |
Matthew Wilcox | 2b2c189 | 2011-10-07 13:10:13 -0400 | [diff] [blame] | 2159 | for (i = 1; i <= nn; i++) { |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 2160 | res = nvme_identify(dev, i, 0, dma_addr); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2161 | if (res) |
| 2162 | continue; |
| 2163 | |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 2164 | if (id_ns->ncap == 0) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2165 | continue; |
| 2166 | |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 2167 | res = nvme_get_features(dev, NVME_FEAT_LBA_RANGE, i, |
Keith Busch | 08df1e0 | 2012-09-21 10:52:13 -0600 | [diff] [blame] | 2168 | dma_addr + 4096, NULL); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2169 | if (res) |
Keith Busch | 1220903 | 2013-01-31 14:40:38 -0700 | [diff] [blame] | 2170 | memset(mem + 4096, 0, 4096); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2171 | |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 2172 | ns = nvme_alloc_ns(dev, i, mem, mem + 4096); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2173 | if (ns) |
| 2174 | list_add_tail(&ns->list, &dev->namespaces); |
| 2175 | } |
| 2176 | list_for_each_entry(ns, &dev->namespaces, list) |
| 2177 | add_disk(ns->disk); |
Matthew Wilcox | 422ef0c | 2013-04-16 11:22:36 -0400 | [diff] [blame] | 2178 | res = 0; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2179 | |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 2180 | out: |
Matthew Wilcox | 684f5c2 | 2011-09-19 17:14:53 -0400 | [diff] [blame] | 2181 | dma_free_coherent(&dev->pci_dev->dev, 8192, mem, dma_addr); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2182 | return res; |
| 2183 | } |
| 2184 | |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 2185 | static int nvme_dev_map(struct nvme_dev *dev) |
| 2186 | { |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 2187 | u64 cap; |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 2188 | int bars, result = -ENOMEM; |
| 2189 | struct pci_dev *pdev = dev->pci_dev; |
| 2190 | |
| 2191 | if (pci_enable_device_mem(pdev)) |
| 2192 | return result; |
| 2193 | |
| 2194 | dev->entry[0].vector = pdev->irq; |
| 2195 | pci_set_master(pdev); |
| 2196 | bars = pci_select_bars(pdev, IORESOURCE_MEM); |
Jens Axboe | be7837e | 2014-11-14 09:50:19 -0700 | [diff] [blame] | 2197 | if (!bars) |
| 2198 | goto disable_pci; |
| 2199 | |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 2200 | if (pci_request_selected_regions(pdev, bars, "nvme")) |
| 2201 | goto disable_pci; |
| 2202 | |
Russell King | 052d0ef | 2013-06-26 23:49:11 +0100 | [diff] [blame] | 2203 | if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) && |
| 2204 | dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) |
| 2205 | goto disable; |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 2206 | |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 2207 | dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); |
| 2208 | if (!dev->bar) |
| 2209 | goto disable; |
Jens Axboe | e32efbf | 2014-11-14 09:49:26 -0700 | [diff] [blame] | 2210 | |
Keith Busch | 0e53d18 | 2013-12-10 13:10:39 -0700 | [diff] [blame] | 2211 | if (readl(&dev->bar->csts) == -1) { |
| 2212 | result = -ENODEV; |
| 2213 | goto unmap; |
| 2214 | } |
Jens Axboe | e32efbf | 2014-11-14 09:49:26 -0700 | [diff] [blame] | 2215 | |
| 2216 | /* |
| 2217 | * Some devices don't advertse INTx interrupts, pre-enable a single |
| 2218 | * MSIX vec for setup. We'll adjust this later. |
| 2219 | */ |
| 2220 | if (!pdev->irq) { |
| 2221 | result = pci_enable_msix(pdev, dev->entry, 1); |
| 2222 | if (result < 0) |
| 2223 | goto unmap; |
| 2224 | } |
| 2225 | |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 2226 | cap = readq(&dev->bar->cap); |
| 2227 | dev->q_depth = min_t(int, NVME_CAP_MQES(cap) + 1, NVME_Q_DEPTH); |
| 2228 | dev->db_stride = 1 << NVME_CAP_STRIDE(cap); |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 2229 | dev->dbs = ((void __iomem *)dev->bar) + 4096; |
| 2230 | |
| 2231 | return 0; |
| 2232 | |
Keith Busch | 0e53d18 | 2013-12-10 13:10:39 -0700 | [diff] [blame] | 2233 | unmap: |
| 2234 | iounmap(dev->bar); |
| 2235 | dev->bar = NULL; |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 2236 | disable: |
| 2237 | pci_release_regions(pdev); |
| 2238 | disable_pci: |
| 2239 | pci_disable_device(pdev); |
| 2240 | return result; |
| 2241 | } |
| 2242 | |
| 2243 | static void nvme_dev_unmap(struct nvme_dev *dev) |
| 2244 | { |
| 2245 | if (dev->pci_dev->msi_enabled) |
| 2246 | pci_disable_msi(dev->pci_dev); |
| 2247 | else if (dev->pci_dev->msix_enabled) |
| 2248 | pci_disable_msix(dev->pci_dev); |
| 2249 | |
| 2250 | if (dev->bar) { |
| 2251 | iounmap(dev->bar); |
| 2252 | dev->bar = NULL; |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2253 | pci_release_regions(dev->pci_dev); |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 2254 | } |
| 2255 | |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 2256 | if (pci_is_enabled(dev->pci_dev)) |
| 2257 | pci_disable_device(dev->pci_dev); |
| 2258 | } |
| 2259 | |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 2260 | struct nvme_delq_ctx { |
| 2261 | struct task_struct *waiter; |
| 2262 | struct kthread_worker *worker; |
| 2263 | atomic_t refcount; |
| 2264 | }; |
| 2265 | |
| 2266 | static void nvme_wait_dq(struct nvme_delq_ctx *dq, struct nvme_dev *dev) |
| 2267 | { |
| 2268 | dq->waiter = current; |
| 2269 | mb(); |
| 2270 | |
| 2271 | for (;;) { |
| 2272 | set_current_state(TASK_KILLABLE); |
| 2273 | if (!atomic_read(&dq->refcount)) |
| 2274 | break; |
| 2275 | if (!schedule_timeout(ADMIN_TIMEOUT) || |
| 2276 | fatal_signal_pending(current)) { |
Keith Busch | 0fb59cb | 2015-01-07 18:55:50 -0700 | [diff] [blame] | 2277 | /* |
| 2278 | * Disable the controller first since we can't trust it |
| 2279 | * at this point, but leave the admin queue enabled |
| 2280 | * until all queue deletion requests are flushed. |
| 2281 | * FIXME: This may take a while if there are more h/w |
| 2282 | * queues than admin tags. |
| 2283 | */ |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 2284 | set_current_state(TASK_RUNNING); |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 2285 | nvme_disable_ctrl(dev, readq(&dev->bar->cap)); |
Keith Busch | 0fb59cb | 2015-01-07 18:55:50 -0700 | [diff] [blame] | 2286 | nvme_clear_queue(dev->queues[0]); |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 2287 | flush_kthread_worker(dq->worker); |
Keith Busch | 0fb59cb | 2015-01-07 18:55:50 -0700 | [diff] [blame] | 2288 | nvme_disable_queue(dev, 0); |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 2289 | return; |
| 2290 | } |
| 2291 | } |
| 2292 | set_current_state(TASK_RUNNING); |
| 2293 | } |
| 2294 | |
| 2295 | static void nvme_put_dq(struct nvme_delq_ctx *dq) |
| 2296 | { |
| 2297 | atomic_dec(&dq->refcount); |
| 2298 | if (dq->waiter) |
| 2299 | wake_up_process(dq->waiter); |
| 2300 | } |
| 2301 | |
| 2302 | static struct nvme_delq_ctx *nvme_get_dq(struct nvme_delq_ctx *dq) |
| 2303 | { |
| 2304 | atomic_inc(&dq->refcount); |
| 2305 | return dq; |
| 2306 | } |
| 2307 | |
| 2308 | static void nvme_del_queue_end(struct nvme_queue *nvmeq) |
| 2309 | { |
| 2310 | struct nvme_delq_ctx *dq = nvmeq->cmdinfo.ctx; |
| 2311 | |
| 2312 | nvme_clear_queue(nvmeq); |
| 2313 | nvme_put_dq(dq); |
| 2314 | } |
| 2315 | |
| 2316 | static int adapter_async_del_queue(struct nvme_queue *nvmeq, u8 opcode, |
| 2317 | kthread_work_func_t fn) |
| 2318 | { |
| 2319 | struct nvme_command c; |
| 2320 | |
| 2321 | memset(&c, 0, sizeof(c)); |
| 2322 | c.delete_queue.opcode = opcode; |
| 2323 | c.delete_queue.qid = cpu_to_le16(nvmeq->qid); |
| 2324 | |
| 2325 | init_kthread_work(&nvmeq->cmdinfo.work, fn); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2326 | return nvme_submit_admin_async_cmd(nvmeq->dev, &c, &nvmeq->cmdinfo, |
| 2327 | ADMIN_TIMEOUT); |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 2328 | } |
| 2329 | |
| 2330 | static void nvme_del_cq_work_handler(struct kthread_work *work) |
| 2331 | { |
| 2332 | struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, |
| 2333 | cmdinfo.work); |
| 2334 | nvme_del_queue_end(nvmeq); |
| 2335 | } |
| 2336 | |
| 2337 | static int nvme_delete_cq(struct nvme_queue *nvmeq) |
| 2338 | { |
| 2339 | return adapter_async_del_queue(nvmeq, nvme_admin_delete_cq, |
| 2340 | nvme_del_cq_work_handler); |
| 2341 | } |
| 2342 | |
| 2343 | static void nvme_del_sq_work_handler(struct kthread_work *work) |
| 2344 | { |
| 2345 | struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, |
| 2346 | cmdinfo.work); |
| 2347 | int status = nvmeq->cmdinfo.status; |
| 2348 | |
| 2349 | if (!status) |
| 2350 | status = nvme_delete_cq(nvmeq); |
| 2351 | if (status) |
| 2352 | nvme_del_queue_end(nvmeq); |
| 2353 | } |
| 2354 | |
| 2355 | static int nvme_delete_sq(struct nvme_queue *nvmeq) |
| 2356 | { |
| 2357 | return adapter_async_del_queue(nvmeq, nvme_admin_delete_sq, |
| 2358 | nvme_del_sq_work_handler); |
| 2359 | } |
| 2360 | |
| 2361 | static void nvme_del_queue_start(struct kthread_work *work) |
| 2362 | { |
| 2363 | struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, |
| 2364 | cmdinfo.work); |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 2365 | if (nvme_delete_sq(nvmeq)) |
| 2366 | nvme_del_queue_end(nvmeq); |
| 2367 | } |
| 2368 | |
| 2369 | static void nvme_disable_io_queues(struct nvme_dev *dev) |
| 2370 | { |
| 2371 | int i; |
| 2372 | DEFINE_KTHREAD_WORKER_ONSTACK(worker); |
| 2373 | struct nvme_delq_ctx dq; |
| 2374 | struct task_struct *kworker_task = kthread_run(kthread_worker_fn, |
| 2375 | &worker, "nvme%d", dev->instance); |
| 2376 | |
| 2377 | if (IS_ERR(kworker_task)) { |
| 2378 | dev_err(&dev->pci_dev->dev, |
| 2379 | "Failed to create queue del task\n"); |
| 2380 | for (i = dev->queue_count - 1; i > 0; i--) |
| 2381 | nvme_disable_queue(dev, i); |
| 2382 | return; |
| 2383 | } |
| 2384 | |
| 2385 | dq.waiter = NULL; |
| 2386 | atomic_set(&dq.refcount, 0); |
| 2387 | dq.worker = &worker; |
| 2388 | for (i = dev->queue_count - 1; i > 0; i--) { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2389 | struct nvme_queue *nvmeq = dev->queues[i]; |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 2390 | |
| 2391 | if (nvme_suspend_queue(nvmeq)) |
| 2392 | continue; |
| 2393 | nvmeq->cmdinfo.ctx = nvme_get_dq(&dq); |
| 2394 | nvmeq->cmdinfo.worker = dq.worker; |
| 2395 | init_kthread_work(&nvmeq->cmdinfo.work, nvme_del_queue_start); |
| 2396 | queue_kthread_work(dq.worker, &nvmeq->cmdinfo.work); |
| 2397 | } |
| 2398 | nvme_wait_dq(&dq, dev); |
| 2399 | kthread_stop(kworker_task); |
| 2400 | } |
| 2401 | |
Dan McLeran | b9afca3 | 2014-04-07 17:10:11 -0600 | [diff] [blame] | 2402 | /* |
| 2403 | * Remove the node from the device list and check |
| 2404 | * for whether or not we need to stop the nvme_thread. |
| 2405 | */ |
| 2406 | static void nvme_dev_list_remove(struct nvme_dev *dev) |
| 2407 | { |
| 2408 | struct task_struct *tmp = NULL; |
| 2409 | |
| 2410 | spin_lock(&dev_list_lock); |
| 2411 | list_del_init(&dev->node); |
| 2412 | if (list_empty(&dev_list) && !IS_ERR_OR_NULL(nvme_thread)) { |
| 2413 | tmp = nvme_thread; |
| 2414 | nvme_thread = NULL; |
| 2415 | } |
| 2416 | spin_unlock(&dev_list_lock); |
| 2417 | |
| 2418 | if (tmp) |
| 2419 | kthread_stop(tmp); |
| 2420 | } |
| 2421 | |
Keith Busch | c9d3bf8 | 2015-01-07 18:55:52 -0700 | [diff] [blame] | 2422 | static void nvme_freeze_queues(struct nvme_dev *dev) |
| 2423 | { |
| 2424 | struct nvme_ns *ns; |
| 2425 | |
| 2426 | list_for_each_entry(ns, &dev->namespaces, list) { |
| 2427 | blk_mq_freeze_queue_start(ns->queue); |
| 2428 | |
| 2429 | spin_lock(ns->queue->queue_lock); |
| 2430 | queue_flag_set(QUEUE_FLAG_STOPPED, ns->queue); |
| 2431 | spin_unlock(ns->queue->queue_lock); |
| 2432 | |
| 2433 | blk_mq_cancel_requeue_work(ns->queue); |
| 2434 | blk_mq_stop_hw_queues(ns->queue); |
| 2435 | } |
| 2436 | } |
| 2437 | |
| 2438 | static void nvme_unfreeze_queues(struct nvme_dev *dev) |
| 2439 | { |
| 2440 | struct nvme_ns *ns; |
| 2441 | |
| 2442 | list_for_each_entry(ns, &dev->namespaces, list) { |
| 2443 | queue_flag_clear_unlocked(QUEUE_FLAG_STOPPED, ns->queue); |
| 2444 | blk_mq_unfreeze_queue(ns->queue); |
| 2445 | blk_mq_start_stopped_hw_queues(ns->queue, true); |
| 2446 | blk_mq_kick_requeue_list(ns->queue); |
| 2447 | } |
| 2448 | } |
| 2449 | |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 2450 | static void nvme_dev_shutdown(struct nvme_dev *dev) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2451 | { |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 2452 | int i; |
Keith Busch | 7c1b245 | 2014-06-25 11:18:12 -0600 | [diff] [blame] | 2453 | u32 csts = -1; |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 2454 | |
Keith Busch | d4b4ff8 | 2013-12-10 13:10:37 -0700 | [diff] [blame] | 2455 | dev->initialized = 0; |
Dan McLeran | b9afca3 | 2014-04-07 17:10:11 -0600 | [diff] [blame] | 2456 | nvme_dev_list_remove(dev); |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 2457 | |
Keith Busch | c9d3bf8 | 2015-01-07 18:55:52 -0700 | [diff] [blame] | 2458 | if (dev->bar) { |
| 2459 | nvme_freeze_queues(dev); |
Keith Busch | 7c1b245 | 2014-06-25 11:18:12 -0600 | [diff] [blame] | 2460 | csts = readl(&dev->bar->csts); |
Keith Busch | c9d3bf8 | 2015-01-07 18:55:52 -0700 | [diff] [blame] | 2461 | } |
Keith Busch | 7c1b245 | 2014-06-25 11:18:12 -0600 | [diff] [blame] | 2462 | if (csts & NVME_CSTS_CFS || !(csts & NVME_CSTS_RDY)) { |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 2463 | for (i = dev->queue_count - 1; i >= 0; i--) { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2464 | struct nvme_queue *nvmeq = dev->queues[i]; |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 2465 | nvme_suspend_queue(nvmeq); |
| 2466 | nvme_clear_queue(nvmeq); |
| 2467 | } |
| 2468 | } else { |
| 2469 | nvme_disable_io_queues(dev); |
Keith Busch | 1894d8f | 2013-07-15 15:02:22 -0600 | [diff] [blame] | 2470 | nvme_shutdown_ctrl(dev); |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 2471 | nvme_disable_queue(dev, 0); |
| 2472 | } |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 2473 | nvme_dev_unmap(dev); |
| 2474 | } |
| 2475 | |
| 2476 | static void nvme_dev_remove(struct nvme_dev *dev) |
| 2477 | { |
Keith Busch | 9ac2709 | 2014-01-31 16:53:39 -0700 | [diff] [blame] | 2478 | struct nvme_ns *ns; |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 2479 | |
Keith Busch | 9ac2709 | 2014-01-31 16:53:39 -0700 | [diff] [blame] | 2480 | list_for_each_entry(ns, &dev->namespaces, list) { |
| 2481 | if (ns->disk->flags & GENHD_FL_UP) |
| 2482 | del_gendisk(ns->disk); |
Keith Busch | cef6a94 | 2015-01-07 18:55:51 -0700 | [diff] [blame] | 2483 | if (!blk_queue_dying(ns->queue)) { |
| 2484 | blk_mq_abort_requeue_list(ns->queue); |
Keith Busch | 9ac2709 | 2014-01-31 16:53:39 -0700 | [diff] [blame] | 2485 | blk_cleanup_queue(ns->queue); |
Keith Busch | cef6a94 | 2015-01-07 18:55:51 -0700 | [diff] [blame] | 2486 | } |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2487 | } |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2488 | } |
| 2489 | |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 2490 | static int nvme_setup_prp_pools(struct nvme_dev *dev) |
| 2491 | { |
| 2492 | struct device *dmadev = &dev->pci_dev->dev; |
| 2493 | dev->prp_page_pool = dma_pool_create("prp list page", dmadev, |
| 2494 | PAGE_SIZE, PAGE_SIZE, 0); |
| 2495 | if (!dev->prp_page_pool) |
| 2496 | return -ENOMEM; |
| 2497 | |
Matthew Wilcox | 99802a7 | 2011-02-10 10:30:34 -0500 | [diff] [blame] | 2498 | /* Optimisation for I/Os between 4k and 128k */ |
| 2499 | dev->prp_small_pool = dma_pool_create("prp list 256", dmadev, |
| 2500 | 256, 256, 0); |
| 2501 | if (!dev->prp_small_pool) { |
| 2502 | dma_pool_destroy(dev->prp_page_pool); |
| 2503 | return -ENOMEM; |
| 2504 | } |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 2505 | return 0; |
| 2506 | } |
| 2507 | |
| 2508 | static void nvme_release_prp_pools(struct nvme_dev *dev) |
| 2509 | { |
| 2510 | dma_pool_destroy(dev->prp_page_pool); |
Matthew Wilcox | 99802a7 | 2011-02-10 10:30:34 -0500 | [diff] [blame] | 2511 | dma_pool_destroy(dev->prp_small_pool); |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 2512 | } |
| 2513 | |
Quoc-Son Anh | cd58ad7 | 2012-02-21 16:50:53 -0700 | [diff] [blame] | 2514 | static DEFINE_IDA(nvme_instance_ida); |
| 2515 | |
| 2516 | static int nvme_set_instance(struct nvme_dev *dev) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2517 | { |
Quoc-Son Anh | cd58ad7 | 2012-02-21 16:50:53 -0700 | [diff] [blame] | 2518 | int instance, error; |
| 2519 | |
| 2520 | do { |
| 2521 | if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) |
| 2522 | return -ENODEV; |
| 2523 | |
| 2524 | spin_lock(&dev_list_lock); |
| 2525 | error = ida_get_new(&nvme_instance_ida, &instance); |
| 2526 | spin_unlock(&dev_list_lock); |
| 2527 | } while (error == -EAGAIN); |
| 2528 | |
| 2529 | if (error) |
| 2530 | return -ENODEV; |
| 2531 | |
| 2532 | dev->instance = instance; |
| 2533 | return 0; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2534 | } |
| 2535 | |
| 2536 | static void nvme_release_instance(struct nvme_dev *dev) |
| 2537 | { |
Quoc-Son Anh | cd58ad7 | 2012-02-21 16:50:53 -0700 | [diff] [blame] | 2538 | spin_lock(&dev_list_lock); |
| 2539 | ida_remove(&nvme_instance_ida, dev->instance); |
| 2540 | spin_unlock(&dev_list_lock); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2541 | } |
| 2542 | |
Keith Busch | 9ac2709 | 2014-01-31 16:53:39 -0700 | [diff] [blame] | 2543 | static void nvme_free_namespaces(struct nvme_dev *dev) |
| 2544 | { |
| 2545 | struct nvme_ns *ns, *next; |
| 2546 | |
| 2547 | list_for_each_entry_safe(ns, next, &dev->namespaces, list) { |
| 2548 | list_del(&ns->list); |
Keith Busch | 9e60352 | 2014-10-03 11:15:47 -0600 | [diff] [blame] | 2549 | |
| 2550 | spin_lock(&dev_list_lock); |
| 2551 | ns->disk->private_data = NULL; |
| 2552 | spin_unlock(&dev_list_lock); |
| 2553 | |
Keith Busch | 9ac2709 | 2014-01-31 16:53:39 -0700 | [diff] [blame] | 2554 | put_disk(ns->disk); |
| 2555 | kfree(ns); |
| 2556 | } |
| 2557 | } |
| 2558 | |
Keith Busch | 5e82e95 | 2013-02-19 10:17:58 -0700 | [diff] [blame] | 2559 | static void nvme_free_dev(struct kref *kref) |
| 2560 | { |
| 2561 | struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref); |
Keith Busch | 9ac2709 | 2014-01-31 16:53:39 -0700 | [diff] [blame] | 2562 | |
Keith Busch | a96d4f5 | 2014-08-19 19:15:59 -0600 | [diff] [blame] | 2563 | pci_dev_put(dev->pci_dev); |
Keith Busch | 9ac2709 | 2014-01-31 16:53:39 -0700 | [diff] [blame] | 2564 | nvme_free_namespaces(dev); |
Indraneel M | 285dffc | 2014-12-11 08:24:18 -0700 | [diff] [blame] | 2565 | nvme_release_instance(dev); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2566 | blk_mq_free_tag_set(&dev->tagset); |
Keith Busch | ea191d2 | 2015-01-07 18:55:49 -0700 | [diff] [blame] | 2567 | blk_put_queue(dev->admin_q); |
Keith Busch | 5e82e95 | 2013-02-19 10:17:58 -0700 | [diff] [blame] | 2568 | kfree(dev->queues); |
| 2569 | kfree(dev->entry); |
| 2570 | kfree(dev); |
| 2571 | } |
| 2572 | |
| 2573 | static int nvme_dev_open(struct inode *inode, struct file *f) |
| 2574 | { |
| 2575 | struct nvme_dev *dev = container_of(f->private_data, struct nvme_dev, |
| 2576 | miscdev); |
| 2577 | kref_get(&dev->kref); |
| 2578 | f->private_data = dev; |
| 2579 | return 0; |
| 2580 | } |
| 2581 | |
| 2582 | static int nvme_dev_release(struct inode *inode, struct file *f) |
| 2583 | { |
| 2584 | struct nvme_dev *dev = f->private_data; |
| 2585 | kref_put(&dev->kref, nvme_free_dev); |
| 2586 | return 0; |
| 2587 | } |
| 2588 | |
| 2589 | static long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg) |
| 2590 | { |
| 2591 | struct nvme_dev *dev = f->private_data; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2592 | struct nvme_ns *ns; |
| 2593 | |
Keith Busch | 5e82e95 | 2013-02-19 10:17:58 -0700 | [diff] [blame] | 2594 | switch (cmd) { |
| 2595 | case NVME_IOCTL_ADMIN_CMD: |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2596 | return nvme_user_cmd(dev, NULL, (void __user *)arg); |
Keith Busch | 7963e52 | 2014-09-12 16:07:20 -0600 | [diff] [blame] | 2597 | case NVME_IOCTL_IO_CMD: |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2598 | if (list_empty(&dev->namespaces)) |
| 2599 | return -ENOTTY; |
| 2600 | ns = list_first_entry(&dev->namespaces, struct nvme_ns, list); |
| 2601 | return nvme_user_cmd(dev, ns, (void __user *)arg); |
Keith Busch | 5e82e95 | 2013-02-19 10:17:58 -0700 | [diff] [blame] | 2602 | default: |
| 2603 | return -ENOTTY; |
| 2604 | } |
| 2605 | } |
| 2606 | |
| 2607 | static const struct file_operations nvme_dev_fops = { |
| 2608 | .owner = THIS_MODULE, |
| 2609 | .open = nvme_dev_open, |
| 2610 | .release = nvme_dev_release, |
| 2611 | .unlocked_ioctl = nvme_dev_ioctl, |
| 2612 | .compat_ioctl = nvme_dev_ioctl, |
| 2613 | }; |
| 2614 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2615 | static void nvme_set_irq_hints(struct nvme_dev *dev) |
| 2616 | { |
| 2617 | struct nvme_queue *nvmeq; |
| 2618 | int i; |
| 2619 | |
| 2620 | for (i = 0; i < dev->online_queues; i++) { |
| 2621 | nvmeq = dev->queues[i]; |
| 2622 | |
| 2623 | if (!nvmeq->hctx) |
| 2624 | continue; |
| 2625 | |
| 2626 | irq_set_affinity_hint(dev->entry[nvmeq->cq_vector].vector, |
| 2627 | nvmeq->hctx->cpumask); |
| 2628 | } |
| 2629 | } |
| 2630 | |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 2631 | static int nvme_dev_start(struct nvme_dev *dev) |
| 2632 | { |
| 2633 | int result; |
Dan McLeran | b9afca3 | 2014-04-07 17:10:11 -0600 | [diff] [blame] | 2634 | bool start_thread = false; |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 2635 | |
| 2636 | result = nvme_dev_map(dev); |
| 2637 | if (result) |
| 2638 | return result; |
| 2639 | |
| 2640 | result = nvme_configure_admin_queue(dev); |
| 2641 | if (result) |
| 2642 | goto unmap; |
| 2643 | |
| 2644 | spin_lock(&dev_list_lock); |
Dan McLeran | b9afca3 | 2014-04-07 17:10:11 -0600 | [diff] [blame] | 2645 | if (list_empty(&dev_list) && IS_ERR_OR_NULL(nvme_thread)) { |
| 2646 | start_thread = true; |
| 2647 | nvme_thread = NULL; |
| 2648 | } |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 2649 | list_add(&dev->node, &dev_list); |
| 2650 | spin_unlock(&dev_list_lock); |
| 2651 | |
Dan McLeran | b9afca3 | 2014-04-07 17:10:11 -0600 | [diff] [blame] | 2652 | if (start_thread) { |
| 2653 | nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); |
Keith Busch | 387caa5 | 2014-09-22 13:46:19 -0600 | [diff] [blame] | 2654 | wake_up_all(&nvme_kthread_wait); |
Dan McLeran | b9afca3 | 2014-04-07 17:10:11 -0600 | [diff] [blame] | 2655 | } else |
| 2656 | wait_event_killable(nvme_kthread_wait, nvme_thread); |
| 2657 | |
| 2658 | if (IS_ERR_OR_NULL(nvme_thread)) { |
| 2659 | result = nvme_thread ? PTR_ERR(nvme_thread) : -EINTR; |
| 2660 | goto disable; |
| 2661 | } |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2662 | |
| 2663 | nvme_init_queue(dev->queues[0], 0); |
Keith Busch | 0fb59cb | 2015-01-07 18:55:50 -0700 | [diff] [blame] | 2664 | result = nvme_alloc_admin_tags(dev); |
| 2665 | if (result) |
| 2666 | goto disable; |
Dan McLeran | b9afca3 | 2014-04-07 17:10:11 -0600 | [diff] [blame] | 2667 | |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 2668 | result = nvme_setup_io_queues(dev); |
Keith Busch | badc34d | 2014-06-23 14:25:35 -0600 | [diff] [blame] | 2669 | if (result) |
Keith Busch | 0fb59cb | 2015-01-07 18:55:50 -0700 | [diff] [blame] | 2670 | goto free_tags; |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 2671 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2672 | nvme_set_irq_hints(dev); |
| 2673 | |
Keith Busch | d82e8bf | 2013-09-05 14:45:07 -0600 | [diff] [blame] | 2674 | return result; |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 2675 | |
Keith Busch | 0fb59cb | 2015-01-07 18:55:50 -0700 | [diff] [blame] | 2676 | free_tags: |
| 2677 | nvme_dev_remove_admin(dev); |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 2678 | disable: |
Keith Busch | a1a5ef9 | 2013-12-16 13:50:00 -0500 | [diff] [blame] | 2679 | nvme_disable_queue(dev, 0); |
Dan McLeran | b9afca3 | 2014-04-07 17:10:11 -0600 | [diff] [blame] | 2680 | nvme_dev_list_remove(dev); |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 2681 | unmap: |
| 2682 | nvme_dev_unmap(dev); |
| 2683 | return result; |
| 2684 | } |
| 2685 | |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2686 | static int nvme_remove_dead_ctrl(void *arg) |
| 2687 | { |
| 2688 | struct nvme_dev *dev = (struct nvme_dev *)arg; |
| 2689 | struct pci_dev *pdev = dev->pci_dev; |
| 2690 | |
| 2691 | if (pci_get_drvdata(pdev)) |
Keith Busch | c81f497 | 2014-06-23 15:24:53 -0600 | [diff] [blame] | 2692 | pci_stop_and_remove_bus_device_locked(pdev); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2693 | kref_put(&dev->kref, nvme_free_dev); |
| 2694 | return 0; |
| 2695 | } |
| 2696 | |
| 2697 | static void nvme_remove_disks(struct work_struct *ws) |
| 2698 | { |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2699 | struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); |
| 2700 | |
Keith Busch | 5a92e70 | 2014-02-21 14:13:44 -0700 | [diff] [blame] | 2701 | nvme_free_queues(dev, 1); |
Keith Busch | 302c672 | 2014-07-18 11:40:20 -0600 | [diff] [blame] | 2702 | nvme_dev_remove(dev); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2703 | } |
| 2704 | |
| 2705 | static int nvme_dev_resume(struct nvme_dev *dev) |
| 2706 | { |
| 2707 | int ret; |
| 2708 | |
| 2709 | ret = nvme_dev_start(dev); |
Keith Busch | badc34d | 2014-06-23 14:25:35 -0600 | [diff] [blame] | 2710 | if (ret) |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2711 | return ret; |
Keith Busch | badc34d | 2014-06-23 14:25:35 -0600 | [diff] [blame] | 2712 | if (dev->online_queues < 2) { |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2713 | spin_lock(&dev_list_lock); |
Tejun Heo | 9ca9737 | 2014-03-07 10:24:49 -0500 | [diff] [blame] | 2714 | dev->reset_workfn = nvme_remove_disks; |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2715 | queue_work(nvme_workq, &dev->reset_work); |
| 2716 | spin_unlock(&dev_list_lock); |
Keith Busch | c9d3bf8 | 2015-01-07 18:55:52 -0700 | [diff] [blame] | 2717 | } else { |
| 2718 | nvme_unfreeze_queues(dev); |
| 2719 | nvme_set_irq_hints(dev); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2720 | } |
Keith Busch | d4b4ff8 | 2013-12-10 13:10:37 -0700 | [diff] [blame] | 2721 | dev->initialized = 1; |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2722 | return 0; |
| 2723 | } |
| 2724 | |
| 2725 | static void nvme_dev_reset(struct nvme_dev *dev) |
| 2726 | { |
| 2727 | nvme_dev_shutdown(dev); |
| 2728 | if (nvme_dev_resume(dev)) { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2729 | dev_warn(&dev->pci_dev->dev, "Device failed to resume\n"); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2730 | kref_get(&dev->kref); |
| 2731 | if (IS_ERR(kthread_run(nvme_remove_dead_ctrl, dev, "nvme%d", |
| 2732 | dev->instance))) { |
| 2733 | dev_err(&dev->pci_dev->dev, |
| 2734 | "Failed to start controller remove task\n"); |
| 2735 | kref_put(&dev->kref, nvme_free_dev); |
| 2736 | } |
| 2737 | } |
| 2738 | } |
| 2739 | |
| 2740 | static void nvme_reset_failed_dev(struct work_struct *ws) |
| 2741 | { |
| 2742 | struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); |
| 2743 | nvme_dev_reset(dev); |
| 2744 | } |
| 2745 | |
Tejun Heo | 9ca9737 | 2014-03-07 10:24:49 -0500 | [diff] [blame] | 2746 | static void nvme_reset_workfn(struct work_struct *work) |
| 2747 | { |
| 2748 | struct nvme_dev *dev = container_of(work, struct nvme_dev, reset_work); |
| 2749 | dev->reset_workfn(work); |
| 2750 | } |
| 2751 | |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 2752 | static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2753 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2754 | int node, result = -ENOMEM; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2755 | struct nvme_dev *dev; |
| 2756 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2757 | node = dev_to_node(&pdev->dev); |
| 2758 | if (node == NUMA_NO_NODE) |
| 2759 | set_dev_node(&pdev->dev, 0); |
| 2760 | |
| 2761 | dev = kzalloc_node(sizeof(*dev), GFP_KERNEL, node); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2762 | if (!dev) |
| 2763 | return -ENOMEM; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2764 | dev->entry = kzalloc_node(num_possible_cpus() * sizeof(*dev->entry), |
| 2765 | GFP_KERNEL, node); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2766 | if (!dev->entry) |
| 2767 | goto free; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2768 | dev->queues = kzalloc_node((num_possible_cpus() + 1) * sizeof(void *), |
| 2769 | GFP_KERNEL, node); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2770 | if (!dev->queues) |
| 2771 | goto free; |
| 2772 | |
| 2773 | INIT_LIST_HEAD(&dev->namespaces); |
Tejun Heo | 9ca9737 | 2014-03-07 10:24:49 -0500 | [diff] [blame] | 2774 | dev->reset_workfn = nvme_reset_failed_dev; |
| 2775 | INIT_WORK(&dev->reset_work, nvme_reset_workfn); |
Keith Busch | a96d4f5 | 2014-08-19 19:15:59 -0600 | [diff] [blame] | 2776 | dev->pci_dev = pci_dev_get(pdev); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2777 | pci_set_drvdata(pdev, dev); |
Quoc-Son Anh | cd58ad7 | 2012-02-21 16:50:53 -0700 | [diff] [blame] | 2778 | result = nvme_set_instance(dev); |
| 2779 | if (result) |
Keith Busch | a96d4f5 | 2014-08-19 19:15:59 -0600 | [diff] [blame] | 2780 | goto put_pci; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2781 | |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 2782 | result = nvme_setup_prp_pools(dev); |
| 2783 | if (result) |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 2784 | goto release; |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 2785 | |
Keith Busch | fb35e91 | 2014-03-03 11:09:47 -0700 | [diff] [blame] | 2786 | kref_init(&dev->kref); |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 2787 | result = nvme_dev_start(dev); |
Keith Busch | badc34d | 2014-06-23 14:25:35 -0600 | [diff] [blame] | 2788 | if (result) |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 2789 | goto release_pools; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2790 | |
Keith Busch | badc34d | 2014-06-23 14:25:35 -0600 | [diff] [blame] | 2791 | if (dev->online_queues > 1) |
| 2792 | result = nvme_dev_add(dev); |
Keith Busch | d82e8bf | 2013-09-05 14:45:07 -0600 | [diff] [blame] | 2793 | if (result) |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 2794 | goto shutdown; |
Matthew Wilcox | 740216f | 2011-02-15 16:28:20 -0500 | [diff] [blame] | 2795 | |
Keith Busch | 5e82e95 | 2013-02-19 10:17:58 -0700 | [diff] [blame] | 2796 | scnprintf(dev->name, sizeof(dev->name), "nvme%d", dev->instance); |
| 2797 | dev->miscdev.minor = MISC_DYNAMIC_MINOR; |
| 2798 | dev->miscdev.parent = &pdev->dev; |
| 2799 | dev->miscdev.name = dev->name; |
| 2800 | dev->miscdev.fops = &nvme_dev_fops; |
| 2801 | result = misc_register(&dev->miscdev); |
| 2802 | if (result) |
| 2803 | goto remove; |
| 2804 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2805 | nvme_set_irq_hints(dev); |
| 2806 | |
Keith Busch | d4b4ff8 | 2013-12-10 13:10:37 -0700 | [diff] [blame] | 2807 | dev->initialized = 1; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2808 | return 0; |
| 2809 | |
Keith Busch | 5e82e95 | 2013-02-19 10:17:58 -0700 | [diff] [blame] | 2810 | remove: |
| 2811 | nvme_dev_remove(dev); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2812 | nvme_dev_remove_admin(dev); |
Keith Busch | 9ac2709 | 2014-01-31 16:53:39 -0700 | [diff] [blame] | 2813 | nvme_free_namespaces(dev); |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 2814 | shutdown: |
| 2815 | nvme_dev_shutdown(dev); |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 2816 | release_pools: |
Keith Busch | a1a5ef9 | 2013-12-16 13:50:00 -0500 | [diff] [blame] | 2817 | nvme_free_queues(dev, 0); |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 2818 | nvme_release_prp_pools(dev); |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 2819 | release: |
| 2820 | nvme_release_instance(dev); |
Keith Busch | a96d4f5 | 2014-08-19 19:15:59 -0600 | [diff] [blame] | 2821 | put_pci: |
| 2822 | pci_dev_put(dev->pci_dev); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2823 | free: |
| 2824 | kfree(dev->queues); |
| 2825 | kfree(dev->entry); |
| 2826 | kfree(dev); |
| 2827 | return result; |
| 2828 | } |
| 2829 | |
Keith Busch | f0d54a5 | 2014-05-02 10:40:43 -0600 | [diff] [blame] | 2830 | static void nvme_reset_notify(struct pci_dev *pdev, bool prepare) |
| 2831 | { |
Keith Busch | a673947 | 2014-06-23 16:03:21 -0600 | [diff] [blame] | 2832 | struct nvme_dev *dev = pci_get_drvdata(pdev); |
Keith Busch | f0d54a5 | 2014-05-02 10:40:43 -0600 | [diff] [blame] | 2833 | |
Keith Busch | a673947 | 2014-06-23 16:03:21 -0600 | [diff] [blame] | 2834 | if (prepare) |
| 2835 | nvme_dev_shutdown(dev); |
| 2836 | else |
| 2837 | nvme_dev_resume(dev); |
Keith Busch | f0d54a5 | 2014-05-02 10:40:43 -0600 | [diff] [blame] | 2838 | } |
| 2839 | |
Keith Busch | 09ece14 | 2014-01-27 11:29:40 -0500 | [diff] [blame] | 2840 | static void nvme_shutdown(struct pci_dev *pdev) |
| 2841 | { |
| 2842 | struct nvme_dev *dev = pci_get_drvdata(pdev); |
| 2843 | nvme_dev_shutdown(dev); |
| 2844 | } |
| 2845 | |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 2846 | static void nvme_remove(struct pci_dev *pdev) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2847 | { |
| 2848 | struct nvme_dev *dev = pci_get_drvdata(pdev); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2849 | |
| 2850 | spin_lock(&dev_list_lock); |
| 2851 | list_del_init(&dev->node); |
| 2852 | spin_unlock(&dev_list_lock); |
| 2853 | |
| 2854 | pci_set_drvdata(pdev, NULL); |
| 2855 | flush_work(&dev->reset_work); |
Keith Busch | 5e82e95 | 2013-02-19 10:17:58 -0700 | [diff] [blame] | 2856 | misc_deregister(&dev->miscdev); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2857 | nvme_dev_shutdown(dev); |
Keith Busch | c9d3bf8 | 2015-01-07 18:55:52 -0700 | [diff] [blame] | 2858 | nvme_dev_remove(dev); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2859 | nvme_dev_remove_admin(dev); |
| 2860 | nvme_free_queues(dev, 0); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2861 | nvme_release_prp_pools(dev); |
Keith Busch | 5e82e95 | 2013-02-19 10:17:58 -0700 | [diff] [blame] | 2862 | kref_put(&dev->kref, nvme_free_dev); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2863 | } |
| 2864 | |
| 2865 | /* These functions are yet to be implemented */ |
| 2866 | #define nvme_error_detected NULL |
| 2867 | #define nvme_dump_registers NULL |
| 2868 | #define nvme_link_reset NULL |
| 2869 | #define nvme_slot_reset NULL |
| 2870 | #define nvme_error_resume NULL |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 2871 | |
Jingoo Han | 671a601 | 2014-02-13 11:19:14 +0900 | [diff] [blame] | 2872 | #ifdef CONFIG_PM_SLEEP |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 2873 | static int nvme_suspend(struct device *dev) |
| 2874 | { |
| 2875 | struct pci_dev *pdev = to_pci_dev(dev); |
| 2876 | struct nvme_dev *ndev = pci_get_drvdata(pdev); |
| 2877 | |
| 2878 | nvme_dev_shutdown(ndev); |
| 2879 | return 0; |
| 2880 | } |
| 2881 | |
| 2882 | static int nvme_resume(struct device *dev) |
| 2883 | { |
| 2884 | struct pci_dev *pdev = to_pci_dev(dev); |
| 2885 | struct nvme_dev *ndev = pci_get_drvdata(pdev); |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 2886 | |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2887 | if (nvme_dev_resume(ndev) && !work_busy(&ndev->reset_work)) { |
Tejun Heo | 9ca9737 | 2014-03-07 10:24:49 -0500 | [diff] [blame] | 2888 | ndev->reset_workfn = nvme_reset_failed_dev; |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2889 | queue_work(nvme_workq, &ndev->reset_work); |
| 2890 | } |
| 2891 | return 0; |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 2892 | } |
Jingoo Han | 671a601 | 2014-02-13 11:19:14 +0900 | [diff] [blame] | 2893 | #endif |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 2894 | |
| 2895 | static SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2896 | |
Stephen Hemminger | 1d35203 | 2012-09-07 09:33:17 -0700 | [diff] [blame] | 2897 | static const struct pci_error_handlers nvme_err_handler = { |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2898 | .error_detected = nvme_error_detected, |
| 2899 | .mmio_enabled = nvme_dump_registers, |
| 2900 | .link_reset = nvme_link_reset, |
| 2901 | .slot_reset = nvme_slot_reset, |
| 2902 | .resume = nvme_error_resume, |
Keith Busch | f0d54a5 | 2014-05-02 10:40:43 -0600 | [diff] [blame] | 2903 | .reset_notify = nvme_reset_notify, |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2904 | }; |
| 2905 | |
| 2906 | /* Move to pci_ids.h later */ |
| 2907 | #define PCI_CLASS_STORAGE_EXPRESS 0x010802 |
| 2908 | |
Matthew Wilcox | 6eb0d69 | 2014-03-24 10:11:22 -0400 | [diff] [blame] | 2909 | static const struct pci_device_id nvme_id_table[] = { |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2910 | { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, |
| 2911 | { 0, } |
| 2912 | }; |
| 2913 | MODULE_DEVICE_TABLE(pci, nvme_id_table); |
| 2914 | |
| 2915 | static struct pci_driver nvme_driver = { |
| 2916 | .name = "nvme", |
| 2917 | .id_table = nvme_id_table, |
| 2918 | .probe = nvme_probe, |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 2919 | .remove = nvme_remove, |
Keith Busch | 09ece14 | 2014-01-27 11:29:40 -0500 | [diff] [blame] | 2920 | .shutdown = nvme_shutdown, |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 2921 | .driver = { |
| 2922 | .pm = &nvme_dev_pm_ops, |
| 2923 | }, |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2924 | .err_handler = &nvme_err_handler, |
| 2925 | }; |
| 2926 | |
| 2927 | static int __init nvme_init(void) |
| 2928 | { |
Matthew Wilcox | 0ac1314 | 2012-07-31 13:31:15 -0400 | [diff] [blame] | 2929 | int result; |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 2930 | |
Dan McLeran | b9afca3 | 2014-04-07 17:10:11 -0600 | [diff] [blame] | 2931 | init_waitqueue_head(&nvme_kthread_wait); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2932 | |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2933 | nvme_workq = create_singlethread_workqueue("nvme"); |
| 2934 | if (!nvme_workq) |
Dan McLeran | b9afca3 | 2014-04-07 17:10:11 -0600 | [diff] [blame] | 2935 | return -ENOMEM; |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2936 | |
Keith Busch | 5c42ea1 | 2012-07-25 16:05:18 -0600 | [diff] [blame] | 2937 | result = register_blkdev(nvme_major, "nvme"); |
| 2938 | if (result < 0) |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2939 | goto kill_workq; |
Keith Busch | 5c42ea1 | 2012-07-25 16:05:18 -0600 | [diff] [blame] | 2940 | else if (result > 0) |
Matthew Wilcox | 0ac1314 | 2012-07-31 13:31:15 -0400 | [diff] [blame] | 2941 | nvme_major = result; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2942 | |
Keith Busch | f3db22f | 2014-06-11 11:51:35 -0600 | [diff] [blame] | 2943 | result = pci_register_driver(&nvme_driver); |
| 2944 | if (result) |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2945 | goto unregister_blkdev; |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 2946 | return 0; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2947 | |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 2948 | unregister_blkdev: |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2949 | unregister_blkdev(nvme_major, "nvme"); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2950 | kill_workq: |
| 2951 | destroy_workqueue(nvme_workq); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2952 | return result; |
| 2953 | } |
| 2954 | |
| 2955 | static void __exit nvme_exit(void) |
| 2956 | { |
| 2957 | pci_unregister_driver(&nvme_driver); |
Keith Busch | f3db22f | 2014-06-11 11:51:35 -0600 | [diff] [blame] | 2958 | unregister_hotcpu_notifier(&nvme_nb); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2959 | unregister_blkdev(nvme_major, "nvme"); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2960 | destroy_workqueue(nvme_workq); |
Dan McLeran | b9afca3 | 2014-04-07 17:10:11 -0600 | [diff] [blame] | 2961 | BUG_ON(nvme_thread && !IS_ERR(nvme_thread)); |
Matthew Wilcox | 21bd78b | 2014-05-09 22:42:26 -0400 | [diff] [blame] | 2962 | _nvme_check_size(); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2963 | } |
| 2964 | |
| 2965 | MODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); |
| 2966 | MODULE_LICENSE("GPL"); |
Keith Busch | c78b4713 | 2014-11-21 15:16:32 -0700 | [diff] [blame] | 2967 | MODULE_VERSION("1.0"); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2968 | module_init(nvme_init); |
| 2969 | module_exit(nvme_exit); |