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 | |
Keith Busch | a0a3408 | 2015-12-07 15:30:31 -0700 | [diff] [blame] | 15 | #include <linux/aer.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> |
Christoph Hellwig | dca51e7 | 2016-09-14 16:18:57 +0200 | [diff] [blame] | 19 | #include <linux/blk-mq-pci.h> |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 20 | #include <linux/cpu.h> |
Matthew Wilcox | fd63e9ce | 2011-05-06 08:37:54 -0400 | [diff] [blame] | 21 | #include <linux/delay.h> |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 22 | #include <linux/errno.h> |
| 23 | #include <linux/fs.h> |
| 24 | #include <linux/genhd.h> |
Keith Busch | 4cc09e2 | 2014-04-02 15:45:37 -0600 | [diff] [blame] | 25 | #include <linux/hdreg.h> |
Matthew Wilcox | 5aff938 | 2011-05-06 08:45:47 -0400 | [diff] [blame] | 26 | #include <linux/idr.h> |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 27 | #include <linux/init.h> |
| 28 | #include <linux/interrupt.h> |
| 29 | #include <linux/io.h> |
| 30 | #include <linux/kdev_t.h> |
| 31 | #include <linux/kernel.h> |
| 32 | #include <linux/mm.h> |
| 33 | #include <linux/module.h> |
| 34 | #include <linux/moduleparam.h> |
Keith Busch | 77bf25e | 2015-11-26 12:21:29 +0100 | [diff] [blame] | 35 | #include <linux/mutex.h> |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 36 | #include <linux/pci.h> |
Matthew Wilcox | be7b627 | 2011-02-06 07:53:23 -0500 | [diff] [blame] | 37 | #include <linux/poison.h> |
Matthew Wilcox | c3bfe71 | 2013-07-08 17:26:25 -0400 | [diff] [blame] | 38 | #include <linux/ptrace.h> |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 39 | #include <linux/sched.h> |
| 40 | #include <linux/slab.h> |
Keith Busch | e1e5e56 | 2015-02-19 13:39:03 -0700 | [diff] [blame] | 41 | #include <linux/t10-pi.h> |
Christoph Hellwig | 2d55cd5 | 2016-02-29 15:59:46 +0100 | [diff] [blame] | 42 | #include <linux/timer.h> |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 43 | #include <linux/types.h> |
Linus Torvalds | 9cf5c09 | 2015-11-06 14:22:15 -0800 | [diff] [blame] | 44 | #include <linux/io-64-nonatomic-lo-hi.h> |
Keith Busch | 1d277a6 | 2015-10-15 14:10:52 +0200 | [diff] [blame] | 45 | #include <asm/unaligned.h> |
Hitoshi Mitake | 797a796 | 2012-02-07 11:45:33 +0900 | [diff] [blame] | 46 | |
Christoph Hellwig | f11bb3e | 2015-10-03 15:46:41 +0200 | [diff] [blame] | 47 | #include "nvme.h" |
| 48 | |
Keith Busch | 9d43cf6 | 2014-05-13 11:42:02 -0600 | [diff] [blame] | 49 | #define NVME_Q_DEPTH 1024 |
Jens Axboe | d31af0a | 2015-03-06 12:56:13 -0700 | [diff] [blame] | 50 | #define NVME_AQ_DEPTH 256 |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 51 | #define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) |
| 52 | #define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) |
Christoph Hellwig | adf68f2 | 2015-11-28 15:42:28 +0100 | [diff] [blame] | 53 | |
| 54 | /* |
| 55 | * We handle AEN commands ourselves and don't even let the |
| 56 | * block layer know about them. |
| 57 | */ |
Christoph Hellwig | f866fc4 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 58 | #define NVME_AQ_BLKMQ_DEPTH (NVME_AQ_DEPTH - NVME_NR_AERS) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 59 | |
Matthew Wilcox | 58ffacb | 2011-02-06 07:28:06 -0500 | [diff] [blame] | 60 | static int use_threaded_interrupts; |
| 61 | module_param(use_threaded_interrupts, int, 0); |
| 62 | |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 63 | static bool use_cmb_sqes = true; |
| 64 | module_param(use_cmb_sqes, bool, 0644); |
| 65 | MODULE_PARM_DESC(use_cmb_sqes, "use controller's memory buffer for I/O SQes"); |
| 66 | |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 67 | static struct workqueue_struct *nvme_workq; |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 68 | |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 69 | struct nvme_dev; |
| 70 | struct nvme_queue; |
Keith Busch | b3fffde | 2015-02-03 11:21:42 -0700 | [diff] [blame] | 71 | |
Keith Busch | 4cc0652 | 2015-06-05 10:30:08 -0600 | [diff] [blame] | 72 | static int nvme_reset(struct nvme_dev *dev); |
Jens Axboe | a0fa964 | 2015-11-03 20:37:26 -0700 | [diff] [blame] | 73 | static void nvme_process_cq(struct nvme_queue *nvmeq); |
Keith Busch | a5cdb68 | 2016-01-12 14:41:18 -0700 | [diff] [blame] | 74 | static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown); |
Keith Busch | d4b4ff8 | 2013-12-10 13:10:37 -0700 | [diff] [blame] | 75 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 76 | /* |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 77 | * Represents an NVM Express device. Each nvme_dev is a PCI function. |
| 78 | */ |
| 79 | struct nvme_dev { |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 80 | struct nvme_queue **queues; |
| 81 | struct blk_mq_tag_set tagset; |
| 82 | struct blk_mq_tag_set admin_tagset; |
| 83 | u32 __iomem *dbs; |
| 84 | struct device *dev; |
| 85 | struct dma_pool *prp_page_pool; |
| 86 | struct dma_pool *prp_small_pool; |
| 87 | unsigned queue_count; |
| 88 | unsigned online_queues; |
| 89 | unsigned max_qid; |
| 90 | int q_depth; |
| 91 | u32 db_stride; |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 92 | void __iomem *bar; |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 93 | struct work_struct reset_work; |
Christoph Hellwig | 5c8809e | 2015-11-26 12:35:49 +0100 | [diff] [blame] | 94 | struct work_struct remove_work; |
Christoph Hellwig | 2d55cd5 | 2016-02-29 15:59:46 +0100 | [diff] [blame] | 95 | struct timer_list watchdog_timer; |
Keith Busch | 77bf25e | 2015-11-26 12:21:29 +0100 | [diff] [blame] | 96 | struct mutex shutdown_lock; |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 97 | bool subsystem; |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 98 | void __iomem *cmb; |
| 99 | dma_addr_t cmb_dma_addr; |
| 100 | u64 cmb_size; |
| 101 | u32 cmbsz; |
Stephen Bates | 202021c | 2016-10-05 20:01:12 -0600 | [diff] [blame] | 102 | u32 cmbloc; |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 103 | struct nvme_ctrl ctrl; |
Keith Busch | db3cbff | 2016-01-12 14:41:17 -0700 | [diff] [blame] | 104 | struct completion ioq_wait; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 105 | }; |
| 106 | |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 107 | static inline struct nvme_dev *to_nvme_dev(struct nvme_ctrl *ctrl) |
| 108 | { |
| 109 | return container_of(ctrl, struct nvme_dev, ctrl); |
| 110 | } |
| 111 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 112 | /* |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 113 | * An NVM Express queue. Each device has at least two (one for admin |
| 114 | * commands and one for I/O commands). |
| 115 | */ |
| 116 | struct nvme_queue { |
| 117 | struct device *q_dmadev; |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 118 | struct nvme_dev *dev; |
Matthew Wilcox | 3193f07 | 2014-01-27 15:57:22 -0500 | [diff] [blame] | 119 | char irqname[24]; /* nvme4294967295-65535\0 */ |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 120 | spinlock_t q_lock; |
| 121 | struct nvme_command *sq_cmds; |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 122 | struct nvme_command __iomem *sq_cmds_io; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 123 | volatile struct nvme_completion *cqes; |
Keith Busch | 4248322 | 2015-06-01 09:29:54 -0600 | [diff] [blame] | 124 | struct blk_mq_tags **tags; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 125 | dma_addr_t sq_dma_addr; |
| 126 | dma_addr_t cq_dma_addr; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 127 | u32 __iomem *q_db; |
| 128 | u16 q_depth; |
Jens Axboe | 6222d17 | 2015-01-15 15:19:10 -0700 | [diff] [blame] | 129 | s16 cq_vector; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 130 | u16 sq_tail; |
| 131 | u16 cq_head; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 132 | u16 qid; |
Matthew Wilcox | e9539f4 | 2013-06-24 11:47:34 -0400 | [diff] [blame] | 133 | u8 cq_phase; |
| 134 | u8 cqe_seen; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 135 | }; |
| 136 | |
| 137 | /* |
Christoph Hellwig | 71bd150 | 2015-10-16 07:58:32 +0200 | [diff] [blame] | 138 | * The nvme_iod describes the data in an I/O, including the list of PRP |
| 139 | * entries. You can't see it in this data structure because C doesn't let |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 140 | * me express that. Use nvme_init_iod to ensure there's enough space |
Christoph Hellwig | 71bd150 | 2015-10-16 07:58:32 +0200 | [diff] [blame] | 141 | * allocated to store the PRP list. |
| 142 | */ |
| 143 | struct nvme_iod { |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 144 | struct nvme_queue *nvmeq; |
| 145 | int aborted; |
Christoph Hellwig | 71bd150 | 2015-10-16 07:58:32 +0200 | [diff] [blame] | 146 | int npages; /* In the PRP list. 0 means small pool in use */ |
Christoph Hellwig | 71bd150 | 2015-10-16 07:58:32 +0200 | [diff] [blame] | 147 | int nents; /* Used in scatterlist */ |
| 148 | int length; /* Of data, in bytes */ |
| 149 | dma_addr_t first_dma; |
Christoph Hellwig | bf68405 | 2015-10-26 17:12:51 +0900 | [diff] [blame] | 150 | struct scatterlist meta_sg; /* metadata requires single contiguous buffer */ |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 151 | struct scatterlist *sg; |
| 152 | struct scatterlist inline_sg[0]; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 153 | }; |
| 154 | |
| 155 | /* |
| 156 | * Check we didin't inadvertently grow the command struct |
| 157 | */ |
| 158 | static inline void _nvme_check_size(void) |
| 159 | { |
| 160 | BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); |
| 161 | BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); |
| 162 | BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); |
| 163 | BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); |
| 164 | BUILD_BUG_ON(sizeof(struct nvme_features) != 64); |
Vishal Verma | f8ebf84 | 2013-03-27 07:13:41 -0400 | [diff] [blame] | 165 | BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 166 | BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 167 | BUILD_BUG_ON(sizeof(struct nvme_command) != 64); |
| 168 | BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); |
| 169 | BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); |
| 170 | BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); |
Keith Busch | 6ecec74 | 2012-09-26 12:49:27 -0600 | [diff] [blame] | 171 | BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 172 | } |
| 173 | |
Jens Axboe | ac3dd5b | 2015-01-22 12:07:58 -0700 | [diff] [blame] | 174 | /* |
| 175 | * Max size of iod being embedded in the request payload |
| 176 | */ |
| 177 | #define NVME_INT_PAGES 2 |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 178 | #define NVME_INT_BYTES(dev) (NVME_INT_PAGES * (dev)->ctrl.page_size) |
Jens Axboe | ac3dd5b | 2015-01-22 12:07:58 -0700 | [diff] [blame] | 179 | |
| 180 | /* |
| 181 | * Will slightly overestimate the number of pages needed. This is OK |
| 182 | * as it only leads to a small amount of wasted memory for the lifetime of |
| 183 | * the I/O. |
| 184 | */ |
| 185 | static int nvme_npages(unsigned size, struct nvme_dev *dev) |
| 186 | { |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 187 | unsigned nprps = DIV_ROUND_UP(size + dev->ctrl.page_size, |
| 188 | dev->ctrl.page_size); |
Jens Axboe | ac3dd5b | 2015-01-22 12:07:58 -0700 | [diff] [blame] | 189 | return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); |
| 190 | } |
| 191 | |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 192 | static unsigned int nvme_iod_alloc_size(struct nvme_dev *dev, |
| 193 | unsigned int size, unsigned int nseg) |
| 194 | { |
| 195 | return sizeof(__le64 *) * nvme_npages(size, dev) + |
| 196 | sizeof(struct scatterlist) * nseg; |
| 197 | } |
| 198 | |
Jens Axboe | ac3dd5b | 2015-01-22 12:07:58 -0700 | [diff] [blame] | 199 | static unsigned int nvme_cmd_size(struct nvme_dev *dev) |
| 200 | { |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 201 | return sizeof(struct nvme_iod) + |
| 202 | nvme_iod_alloc_size(dev, NVME_INT_BYTES(dev), NVME_INT_PAGES); |
Jens Axboe | ac3dd5b | 2015-01-22 12:07:58 -0700 | [diff] [blame] | 203 | } |
| 204 | |
Christoph Hellwig | dca51e7 | 2016-09-14 16:18:57 +0200 | [diff] [blame] | 205 | static int nvmeq_irq(struct nvme_queue *nvmeq) |
| 206 | { |
| 207 | return pci_irq_vector(to_pci_dev(nvmeq->dev->dev), nvmeq->cq_vector); |
| 208 | } |
| 209 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 210 | static int nvme_admin_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, |
| 211 | unsigned int hctx_idx) |
Matthew Wilcox | e85248e | 2011-02-06 18:30:16 -0500 | [diff] [blame] | 212 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 213 | struct nvme_dev *dev = data; |
| 214 | struct nvme_queue *nvmeq = dev->queues[0]; |
| 215 | |
Keith Busch | 4248322 | 2015-06-01 09:29:54 -0600 | [diff] [blame] | 216 | WARN_ON(hctx_idx != 0); |
| 217 | WARN_ON(dev->admin_tagset.tags[0] != hctx->tags); |
| 218 | WARN_ON(nvmeq->tags); |
| 219 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 220 | hctx->driver_data = nvmeq; |
Keith Busch | 4248322 | 2015-06-01 09:29:54 -0600 | [diff] [blame] | 221 | nvmeq->tags = &dev->admin_tagset.tags[0]; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 222 | return 0; |
Matthew Wilcox | e85248e | 2011-02-06 18:30:16 -0500 | [diff] [blame] | 223 | } |
| 224 | |
Keith Busch | 4af0e21 | 2015-06-08 10:08:13 -0600 | [diff] [blame] | 225 | static void nvme_admin_exit_hctx(struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx) |
| 226 | { |
| 227 | struct nvme_queue *nvmeq = hctx->driver_data; |
| 228 | |
| 229 | nvmeq->tags = NULL; |
| 230 | } |
| 231 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 232 | static int nvme_admin_init_request(void *data, struct request *req, |
| 233 | unsigned int hctx_idx, unsigned int rq_idx, |
| 234 | unsigned int numa_node) |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 235 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 236 | struct nvme_dev *dev = data; |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 237 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 238 | struct nvme_queue *nvmeq = dev->queues[0]; |
| 239 | |
| 240 | BUG_ON(!nvmeq); |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 241 | iod->nvmeq = nvmeq; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 242 | return 0; |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 243 | } |
| 244 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 245 | static int nvme_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, |
| 246 | unsigned int hctx_idx) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 247 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 248 | struct nvme_dev *dev = data; |
Keith Busch | 4248322 | 2015-06-01 09:29:54 -0600 | [diff] [blame] | 249 | struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 250 | |
Keith Busch | 4248322 | 2015-06-01 09:29:54 -0600 | [diff] [blame] | 251 | if (!nvmeq->tags) |
| 252 | nvmeq->tags = &dev->tagset.tags[hctx_idx]; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 253 | |
Keith Busch | 4248322 | 2015-06-01 09:29:54 -0600 | [diff] [blame] | 254 | WARN_ON(dev->tagset.tags[hctx_idx] != hctx->tags); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 255 | hctx->driver_data = nvmeq; |
| 256 | return 0; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 257 | } |
| 258 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 259 | static int nvme_init_request(void *data, struct request *req, |
| 260 | unsigned int hctx_idx, unsigned int rq_idx, |
| 261 | unsigned int numa_node) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 262 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 263 | struct nvme_dev *dev = data; |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 264 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 265 | struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; |
| 266 | |
| 267 | BUG_ON(!nvmeq); |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 268 | iod->nvmeq = nvmeq; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 269 | return 0; |
| 270 | } |
| 271 | |
Christoph Hellwig | dca51e7 | 2016-09-14 16:18:57 +0200 | [diff] [blame] | 272 | static int nvme_pci_map_queues(struct blk_mq_tag_set *set) |
| 273 | { |
| 274 | struct nvme_dev *dev = set->driver_data; |
| 275 | |
| 276 | return blk_mq_pci_map_queues(set, to_pci_dev(dev->dev)); |
| 277 | } |
| 278 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 279 | /** |
Christoph Hellwig | adf68f2 | 2015-11-28 15:42:28 +0100 | [diff] [blame] | 280 | * __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] | 281 | * @nvmeq: The queue to use |
| 282 | * @cmd: The command to send |
| 283 | * |
| 284 | * Safe to use from interrupt context |
| 285 | */ |
Sunad Bhandary | e3f879b | 2015-07-31 18:56:58 +0530 | [diff] [blame] | 286 | static void __nvme_submit_cmd(struct nvme_queue *nvmeq, |
| 287 | struct nvme_command *cmd) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 288 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 289 | u16 tail = nvmeq->sq_tail; |
| 290 | |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 291 | if (nvmeq->sq_cmds_io) |
| 292 | memcpy_toio(&nvmeq->sq_cmds_io[tail], cmd, sizeof(*cmd)); |
| 293 | else |
| 294 | memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); |
| 295 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 296 | if (++tail == nvmeq->q_depth) |
| 297 | tail = 0; |
Matthew Wilcox | 7547881 | 2011-02-16 09:59:59 -0500 | [diff] [blame] | 298 | writel(tail, nvmeq->q_db); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 299 | nvmeq->sq_tail = tail; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 300 | } |
| 301 | |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 302 | static __le64 **iod_list(struct request *req) |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 303 | { |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 304 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
| 305 | return (__le64 **)(iod->sg + req->nr_phys_segments); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 306 | } |
| 307 | |
Ming Lin | 58b4560 | 2016-03-22 00:24:43 -0700 | [diff] [blame] | 308 | static int nvme_init_iod(struct request *rq, unsigned size, |
| 309 | struct nvme_dev *dev) |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 310 | { |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 311 | struct nvme_iod *iod = blk_mq_rq_to_pdu(rq); |
| 312 | int nseg = rq->nr_phys_segments; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 313 | |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 314 | if (nseg > NVME_INT_PAGES || size > NVME_INT_BYTES(dev)) { |
| 315 | iod->sg = kmalloc(nvme_iod_alloc_size(dev, size, nseg), GFP_ATOMIC); |
| 316 | if (!iod->sg) |
| 317 | return BLK_MQ_RQ_QUEUE_BUSY; |
| 318 | } else { |
| 319 | iod->sg = iod->inline_sg; |
Jens Axboe | ac3dd5b | 2015-01-22 12:07:58 -0700 | [diff] [blame] | 320 | } |
| 321 | |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 322 | iod->aborted = 0; |
| 323 | iod->npages = -1; |
| 324 | iod->nents = 0; |
| 325 | iod->length = size; |
Keith Busch | f80ec96 | 2016-07-12 16:20:31 -0700 | [diff] [blame] | 326 | |
| 327 | if (!(rq->cmd_flags & REQ_DONTPREP)) { |
| 328 | rq->retries = 0; |
| 329 | rq->cmd_flags |= REQ_DONTPREP; |
| 330 | } |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 331 | return 0; |
Jens Axboe | ac3dd5b | 2015-01-22 12:07:58 -0700 | [diff] [blame] | 332 | } |
| 333 | |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 334 | static void nvme_free_iod(struct nvme_dev *dev, struct request *req) |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 335 | { |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 336 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 337 | const int last_prp = dev->ctrl.page_size / 8 - 1; |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 338 | int i; |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 339 | __le64 **list = iod_list(req); |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 340 | dma_addr_t prp_dma = iod->first_dma; |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 341 | |
Ming Lin | 6904242 | 2016-04-25 14:33:20 -0700 | [diff] [blame] | 342 | nvme_cleanup_cmd(req); |
Ming Lin | 03b5929 | 2016-03-22 00:24:45 -0700 | [diff] [blame] | 343 | |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 344 | if (iod->npages == 0) |
| 345 | dma_pool_free(dev->prp_small_pool, list[0], prp_dma); |
| 346 | for (i = 0; i < iod->npages; i++) { |
| 347 | __le64 *prp_list = list[i]; |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 348 | 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] | 349 | dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 350 | prp_dma = next_prp_dma; |
| 351 | } |
Jens Axboe | ac3dd5b | 2015-01-22 12:07:58 -0700 | [diff] [blame] | 352 | |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 353 | if (iod->sg != iod->inline_sg) |
| 354 | kfree(iod->sg); |
Keith Busch | b4ff9c8 | 2014-08-29 09:06:12 -0600 | [diff] [blame] | 355 | } |
| 356 | |
Keith Busch | 52b68d7 | 2015-02-23 09:16:21 -0700 | [diff] [blame] | 357 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
Keith Busch | e1e5e56 | 2015-02-19 13:39:03 -0700 | [diff] [blame] | 358 | static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) |
| 359 | { |
| 360 | if (be32_to_cpu(pi->ref_tag) == v) |
| 361 | pi->ref_tag = cpu_to_be32(p); |
| 362 | } |
| 363 | |
| 364 | static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) |
| 365 | { |
| 366 | if (be32_to_cpu(pi->ref_tag) == p) |
| 367 | pi->ref_tag = cpu_to_be32(v); |
| 368 | } |
| 369 | |
| 370 | /** |
| 371 | * nvme_dif_remap - remaps ref tags to bip seed and physical lba |
| 372 | * |
| 373 | * The virtual start sector is the one that was originally submitted by the |
| 374 | * block layer. Due to partitioning, MD/DM cloning, etc. the actual physical |
| 375 | * start sector may be different. Remap protection information to match the |
| 376 | * physical LBA on writes, and back to the original seed on reads. |
| 377 | * |
| 378 | * Type 0 and 3 do not have a ref tag, so no remapping required. |
| 379 | */ |
| 380 | static void nvme_dif_remap(struct request *req, |
| 381 | void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) |
| 382 | { |
| 383 | struct nvme_ns *ns = req->rq_disk->private_data; |
| 384 | struct bio_integrity_payload *bip; |
| 385 | struct t10_pi_tuple *pi; |
| 386 | void *p, *pmap; |
| 387 | u32 i, nlb, ts, phys, virt; |
| 388 | |
| 389 | if (!ns->pi_type || ns->pi_type == NVME_NS_DPS_PI_TYPE3) |
| 390 | return; |
| 391 | |
| 392 | bip = bio_integrity(req->bio); |
| 393 | if (!bip) |
| 394 | return; |
| 395 | |
| 396 | pmap = kmap_atomic(bip->bip_vec->bv_page) + bip->bip_vec->bv_offset; |
Keith Busch | e1e5e56 | 2015-02-19 13:39:03 -0700 | [diff] [blame] | 397 | |
| 398 | p = pmap; |
| 399 | virt = bip_get_seed(bip); |
| 400 | phys = nvme_block_nr(ns, blk_rq_pos(req)); |
| 401 | nlb = (blk_rq_bytes(req) >> ns->lba_shift); |
Dan Williams | ac6fc48 | 2015-10-21 13:20:18 -0400 | [diff] [blame] | 402 | ts = ns->disk->queue->integrity.tuple_size; |
Keith Busch | e1e5e56 | 2015-02-19 13:39:03 -0700 | [diff] [blame] | 403 | |
| 404 | for (i = 0; i < nlb; i++, virt++, phys++) { |
| 405 | pi = (struct t10_pi_tuple *)p; |
| 406 | dif_swap(phys, virt, pi); |
| 407 | p += ts; |
| 408 | } |
| 409 | kunmap_atomic(pmap); |
| 410 | } |
Keith Busch | 52b68d7 | 2015-02-23 09:16:21 -0700 | [diff] [blame] | 411 | #else /* CONFIG_BLK_DEV_INTEGRITY */ |
| 412 | static void nvme_dif_remap(struct request *req, |
| 413 | void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) |
| 414 | { |
| 415 | } |
| 416 | static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) |
| 417 | { |
| 418 | } |
| 419 | static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) |
| 420 | { |
| 421 | } |
Keith Busch | 52b68d7 | 2015-02-23 09:16:21 -0700 | [diff] [blame] | 422 | #endif |
| 423 | |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 424 | static bool nvme_setup_prps(struct nvme_dev *dev, struct request *req, |
Christoph Hellwig | 69d2b57 | 2015-10-16 07:58:37 +0200 | [diff] [blame] | 425 | int total_len) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 426 | { |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 427 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
Matthew Wilcox | 99802a7 | 2011-02-10 10:30:34 -0500 | [diff] [blame] | 428 | struct dma_pool *pool; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 429 | int length = total_len; |
| 430 | struct scatterlist *sg = iod->sg; |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 431 | int dma_len = sg_dma_len(sg); |
| 432 | u64 dma_addr = sg_dma_address(sg); |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 433 | u32 page_size = dev->ctrl.page_size; |
Murali Iyer | f137e0f | 2015-03-26 11:07:51 -0500 | [diff] [blame] | 434 | int offset = dma_addr & (page_size - 1); |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 435 | __le64 *prp_list; |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 436 | __le64 **list = iod_list(req); |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 437 | dma_addr_t prp_dma; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 438 | int nprps, i; |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 439 | |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 440 | length -= (page_size - offset); |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 441 | if (length <= 0) |
Christoph Hellwig | 69d2b57 | 2015-10-16 07:58:37 +0200 | [diff] [blame] | 442 | return true; |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 443 | |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 444 | dma_len -= (page_size - offset); |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 445 | if (dma_len) { |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 446 | dma_addr += (page_size - offset); |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 447 | } else { |
| 448 | sg = sg_next(sg); |
| 449 | dma_addr = sg_dma_address(sg); |
| 450 | dma_len = sg_dma_len(sg); |
| 451 | } |
| 452 | |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 453 | if (length <= page_size) { |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 454 | iod->first_dma = dma_addr; |
Christoph Hellwig | 69d2b57 | 2015-10-16 07:58:37 +0200 | [diff] [blame] | 455 | return true; |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 456 | } |
| 457 | |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 458 | nprps = DIV_ROUND_UP(length, page_size); |
Matthew Wilcox | 99802a7 | 2011-02-10 10:30:34 -0500 | [diff] [blame] | 459 | if (nprps <= (256 / 8)) { |
| 460 | pool = dev->prp_small_pool; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 461 | iod->npages = 0; |
Matthew Wilcox | 99802a7 | 2011-02-10 10:30:34 -0500 | [diff] [blame] | 462 | } else { |
| 463 | pool = dev->prp_page_pool; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 464 | iod->npages = 1; |
Matthew Wilcox | 99802a7 | 2011-02-10 10:30:34 -0500 | [diff] [blame] | 465 | } |
| 466 | |
Christoph Hellwig | 69d2b57 | 2015-10-16 07:58:37 +0200 | [diff] [blame] | 467 | prp_list = dma_pool_alloc(pool, GFP_ATOMIC, &prp_dma); |
Matthew Wilcox | b77954c | 2011-05-12 13:51:41 -0400 | [diff] [blame] | 468 | if (!prp_list) { |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 469 | iod->first_dma = dma_addr; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 470 | iod->npages = -1; |
Christoph Hellwig | 69d2b57 | 2015-10-16 07:58:37 +0200 | [diff] [blame] | 471 | return false; |
Matthew Wilcox | b77954c | 2011-05-12 13:51:41 -0400 | [diff] [blame] | 472 | } |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 473 | list[0] = prp_list; |
| 474 | iod->first_dma = prp_dma; |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 475 | i = 0; |
| 476 | for (;;) { |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 477 | if (i == page_size >> 3) { |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 478 | __le64 *old_prp_list = prp_list; |
Christoph Hellwig | 69d2b57 | 2015-10-16 07:58:37 +0200 | [diff] [blame] | 479 | prp_list = dma_pool_alloc(pool, GFP_ATOMIC, &prp_dma); |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 480 | if (!prp_list) |
Christoph Hellwig | 69d2b57 | 2015-10-16 07:58:37 +0200 | [diff] [blame] | 481 | return false; |
Matthew Wilcox | eca18b2 | 2011-12-20 13:34:52 -0500 | [diff] [blame] | 482 | list[iod->npages++] = prp_list; |
Matthew Wilcox | 7523d83 | 2011-03-16 16:43:40 -0400 | [diff] [blame] | 483 | prp_list[0] = old_prp_list[i - 1]; |
| 484 | old_prp_list[i - 1] = cpu_to_le64(prp_dma); |
| 485 | i = 1; |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 486 | } |
| 487 | prp_list[i++] = cpu_to_le64(dma_addr); |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 488 | dma_len -= page_size; |
| 489 | dma_addr += page_size; |
| 490 | length -= page_size; |
Shane Michael Matthews | e025344c | 2011-02-10 08:51:24 -0500 | [diff] [blame] | 491 | if (length <= 0) |
| 492 | break; |
| 493 | if (dma_len > 0) |
| 494 | continue; |
| 495 | BUG_ON(dma_len < 0); |
| 496 | sg = sg_next(sg); |
| 497 | dma_addr = sg_dma_address(sg); |
| 498 | dma_len = sg_dma_len(sg); |
| 499 | } |
| 500 | |
Christoph Hellwig | 69d2b57 | 2015-10-16 07:58:37 +0200 | [diff] [blame] | 501 | return true; |
Matthew Wilcox | ff22b54 | 2011-01-26 10:02:29 -0500 | [diff] [blame] | 502 | } |
| 503 | |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 504 | static int nvme_map_data(struct nvme_dev *dev, struct request *req, |
Ming Lin | 03b5929 | 2016-03-22 00:24:45 -0700 | [diff] [blame] | 505 | unsigned size, struct nvme_command *cmnd) |
Christoph Hellwig | d29ec82 | 2015-05-22 11:12:46 +0200 | [diff] [blame] | 506 | { |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 507 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 508 | struct request_queue *q = req->q; |
| 509 | enum dma_data_direction dma_dir = rq_data_dir(req) ? |
| 510 | DMA_TO_DEVICE : DMA_FROM_DEVICE; |
| 511 | int ret = BLK_MQ_RQ_QUEUE_ERROR; |
Christoph Hellwig | d29ec82 | 2015-05-22 11:12:46 +0200 | [diff] [blame] | 512 | |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 513 | sg_init_table(iod->sg, req->nr_phys_segments); |
| 514 | iod->nents = blk_rq_map_sg(q, req, iod->sg); |
| 515 | if (!iod->nents) |
| 516 | goto out; |
| 517 | |
| 518 | ret = BLK_MQ_RQ_QUEUE_BUSY; |
Mauricio Faria de Oliveira | 2b6b535 | 2016-10-11 13:54:20 -0700 | [diff] [blame] | 519 | if (!dma_map_sg_attrs(dev->dev, iod->sg, iod->nents, dma_dir, |
| 520 | DMA_ATTR_NO_WARN)) |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 521 | goto out; |
| 522 | |
Ming Lin | 03b5929 | 2016-03-22 00:24:45 -0700 | [diff] [blame] | 523 | if (!nvme_setup_prps(dev, req, size)) |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 524 | goto out_unmap; |
| 525 | |
| 526 | ret = BLK_MQ_RQ_QUEUE_ERROR; |
| 527 | if (blk_integrity_rq(req)) { |
| 528 | if (blk_rq_count_integrity_sg(q, req->bio) != 1) |
| 529 | goto out_unmap; |
| 530 | |
Christoph Hellwig | bf68405 | 2015-10-26 17:12:51 +0900 | [diff] [blame] | 531 | sg_init_table(&iod->meta_sg, 1); |
| 532 | if (blk_rq_map_integrity_sg(q, req->bio, &iod->meta_sg) != 1) |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 533 | goto out_unmap; |
| 534 | |
| 535 | if (rq_data_dir(req)) |
| 536 | nvme_dif_remap(req, nvme_dif_prep); |
| 537 | |
Christoph Hellwig | bf68405 | 2015-10-26 17:12:51 +0900 | [diff] [blame] | 538 | if (!dma_map_sg(dev->dev, &iod->meta_sg, 1, dma_dir)) |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 539 | goto out_unmap; |
Christoph Hellwig | d29ec82 | 2015-05-22 11:12:46 +0200 | [diff] [blame] | 540 | } |
| 541 | |
Christoph Hellwig | eb793e2 | 2016-06-13 16:45:25 +0200 | [diff] [blame] | 542 | cmnd->rw.dptr.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); |
| 543 | cmnd->rw.dptr.prp2 = cpu_to_le64(iod->first_dma); |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 544 | if (blk_integrity_rq(req)) |
Christoph Hellwig | bf68405 | 2015-10-26 17:12:51 +0900 | [diff] [blame] | 545 | cmnd->rw.metadata = cpu_to_le64(sg_dma_address(&iod->meta_sg)); |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 546 | return BLK_MQ_RQ_QUEUE_OK; |
| 547 | |
| 548 | out_unmap: |
| 549 | dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); |
| 550 | out: |
| 551 | return ret; |
Christoph Hellwig | d29ec82 | 2015-05-22 11:12:46 +0200 | [diff] [blame] | 552 | } |
| 553 | |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 554 | static void nvme_unmap_data(struct nvme_dev *dev, struct request *req) |
Christoph Hellwig | d4f6c3a | 2015-11-26 10:51:23 +0100 | [diff] [blame] | 555 | { |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 556 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
Christoph Hellwig | d4f6c3a | 2015-11-26 10:51:23 +0100 | [diff] [blame] | 557 | enum dma_data_direction dma_dir = rq_data_dir(req) ? |
| 558 | DMA_TO_DEVICE : DMA_FROM_DEVICE; |
| 559 | |
| 560 | if (iod->nents) { |
| 561 | dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); |
| 562 | if (blk_integrity_rq(req)) { |
| 563 | if (!rq_data_dir(req)) |
| 564 | nvme_dif_remap(req, nvme_dif_complete); |
Christoph Hellwig | bf68405 | 2015-10-26 17:12:51 +0900 | [diff] [blame] | 565 | dma_unmap_sg(dev->dev, &iod->meta_sg, 1, dma_dir); |
Christoph Hellwig | d4f6c3a | 2015-11-26 10:51:23 +0100 | [diff] [blame] | 566 | } |
| 567 | } |
| 568 | |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 569 | nvme_free_iod(dev, req); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 570 | } |
| 571 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 572 | /* |
Christoph Hellwig | d29ec82 | 2015-05-22 11:12:46 +0200 | [diff] [blame] | 573 | * NOTE: ns is NULL when called on the admin queue. |
| 574 | */ |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 575 | static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx, |
| 576 | const struct blk_mq_queue_data *bd) |
Keith Busch | 53562be | 2014-04-29 11:41:29 -0600 | [diff] [blame] | 577 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 578 | struct nvme_ns *ns = hctx->queue->queuedata; |
| 579 | struct nvme_queue *nvmeq = hctx->driver_data; |
Christoph Hellwig | d29ec82 | 2015-05-22 11:12:46 +0200 | [diff] [blame] | 580 | struct nvme_dev *dev = nvmeq->dev; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 581 | struct request *req = bd->rq; |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 582 | struct nvme_command cmnd; |
Ming Lin | 58b4560 | 2016-03-22 00:24:43 -0700 | [diff] [blame] | 583 | unsigned map_len; |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 584 | int ret = BLK_MQ_RQ_QUEUE_OK; |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 585 | |
Keith Busch | e1e5e56 | 2015-02-19 13:39:03 -0700 | [diff] [blame] | 586 | /* |
| 587 | * If formated with metadata, require the block layer provide a buffer |
| 588 | * unless this namespace is formated such that the metadata can be |
| 589 | * stripped/generated by the controller with PRACT=1. |
| 590 | */ |
Christoph Hellwig | d29ec82 | 2015-05-22 11:12:46 +0200 | [diff] [blame] | 591 | if (ns && ns->ms && !blk_integrity_rq(req)) { |
Keith Busch | 71feb36 | 2015-06-19 11:07:30 -0600 | [diff] [blame] | 592 | if (!(ns->pi_type && ns->ms == 8) && |
| 593 | req->cmd_type != REQ_TYPE_DRV_PRIV) { |
Christoph Hellwig | eee417b | 2015-11-26 13:03:13 +0100 | [diff] [blame] | 594 | blk_mq_end_request(req, -EFAULT); |
Keith Busch | e1e5e56 | 2015-02-19 13:39:03 -0700 | [diff] [blame] | 595 | return BLK_MQ_RQ_QUEUE_OK; |
| 596 | } |
| 597 | } |
| 598 | |
Ming Lin | 58b4560 | 2016-03-22 00:24:43 -0700 | [diff] [blame] | 599 | map_len = nvme_map_len(req); |
| 600 | ret = nvme_init_iod(req, map_len, dev); |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 601 | if (ret) |
| 602 | return ret; |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 603 | |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 604 | ret = nvme_setup_cmd(ns, req, &cmnd); |
Ming Lin | 03b5929 | 2016-03-22 00:24:45 -0700 | [diff] [blame] | 605 | if (ret) |
| 606 | goto out; |
Keith Busch | edd10d3 | 2014-04-03 16:45:23 -0600 | [diff] [blame] | 607 | |
Ming Lin | 03b5929 | 2016-03-22 00:24:45 -0700 | [diff] [blame] | 608 | if (req->nr_phys_segments) |
| 609 | ret = nvme_map_data(dev, req, map_len, &cmnd); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 610 | |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 611 | if (ret) |
| 612 | goto out; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 613 | |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 614 | cmnd.common.command_id = req->tag; |
Christoph Hellwig | aae239e | 2015-11-26 12:59:50 +0100 | [diff] [blame] | 615 | blk_mq_start_request(req); |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 616 | |
| 617 | spin_lock_irq(&nvmeq->q_lock); |
Keith Busch | ae1fba2 | 2016-02-11 13:05:42 -0700 | [diff] [blame] | 618 | if (unlikely(nvmeq->cq_vector < 0)) { |
Keith Busch | 69d9a99 | 2016-02-24 09:15:56 -0700 | [diff] [blame] | 619 | if (ns && !test_bit(NVME_NS_DEAD, &ns->flags)) |
| 620 | ret = BLK_MQ_RQ_QUEUE_BUSY; |
| 621 | else |
| 622 | ret = BLK_MQ_RQ_QUEUE_ERROR; |
Keith Busch | ae1fba2 | 2016-02-11 13:05:42 -0700 | [diff] [blame] | 623 | spin_unlock_irq(&nvmeq->q_lock); |
| 624 | goto out; |
| 625 | } |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 626 | __nvme_submit_cmd(nvmeq, &cmnd); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 627 | nvme_process_cq(nvmeq); |
| 628 | spin_unlock_irq(&nvmeq->q_lock); |
| 629 | return BLK_MQ_RQ_QUEUE_OK; |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 630 | out: |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 631 | nvme_free_iod(dev, req); |
Christoph Hellwig | ba1ca37 | 2015-10-16 07:58:38 +0200 | [diff] [blame] | 632 | return ret; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 633 | } |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 634 | |
Christoph Hellwig | eee417b | 2015-11-26 13:03:13 +0100 | [diff] [blame] | 635 | static void nvme_complete_rq(struct request *req) |
| 636 | { |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 637 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
| 638 | struct nvme_dev *dev = iod->nvmeq->dev; |
Christoph Hellwig | eee417b | 2015-11-26 13:03:13 +0100 | [diff] [blame] | 639 | int error = 0; |
| 640 | |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 641 | nvme_unmap_data(dev, req); |
Christoph Hellwig | eee417b | 2015-11-26 13:03:13 +0100 | [diff] [blame] | 642 | |
| 643 | if (unlikely(req->errors)) { |
| 644 | if (nvme_req_needs_retry(req, req->errors)) { |
Keith Busch | f80ec96 | 2016-07-12 16:20:31 -0700 | [diff] [blame] | 645 | req->retries++; |
Christoph Hellwig | eee417b | 2015-11-26 13:03:13 +0100 | [diff] [blame] | 646 | nvme_requeue_req(req); |
| 647 | return; |
| 648 | } |
| 649 | |
| 650 | if (req->cmd_type == REQ_TYPE_DRV_PRIV) |
| 651 | error = req->errors; |
| 652 | else |
| 653 | error = nvme_error_status(req->errors); |
| 654 | } |
| 655 | |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 656 | if (unlikely(iod->aborted)) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 657 | dev_warn(dev->ctrl.device, |
Christoph Hellwig | eee417b | 2015-11-26 13:03:13 +0100 | [diff] [blame] | 658 | "completing aborted command with status: %04x\n", |
| 659 | req->errors); |
| 660 | } |
| 661 | |
| 662 | blk_mq_end_request(req, error); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 663 | } |
| 664 | |
Marta Rybczynska | d783e0b | 2016-03-22 16:02:06 +0100 | [diff] [blame] | 665 | /* We read the CQE phase first to check if the rest of the entry is valid */ |
| 666 | static inline bool nvme_cqe_valid(struct nvme_queue *nvmeq, u16 head, |
| 667 | u16 phase) |
| 668 | { |
| 669 | return (le16_to_cpu(nvmeq->cqes[head].status) & 1) == phase; |
| 670 | } |
| 671 | |
Jens Axboe | a0fa964 | 2015-11-03 20:37:26 -0700 | [diff] [blame] | 672 | static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 673 | { |
Matthew Wilcox | 8212346 | 2011-01-20 13:24:06 -0500 | [diff] [blame] | 674 | u16 head, phase; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 675 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 676 | head = nvmeq->cq_head; |
Matthew Wilcox | 8212346 | 2011-01-20 13:24:06 -0500 | [diff] [blame] | 677 | phase = nvmeq->cq_phase; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 678 | |
Marta Rybczynska | d783e0b | 2016-03-22 16:02:06 +0100 | [diff] [blame] | 679 | while (nvme_cqe_valid(nvmeq, head, phase)) { |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 680 | struct nvme_completion cqe = nvmeq->cqes[head]; |
Christoph Hellwig | eee417b | 2015-11-26 13:03:13 +0100 | [diff] [blame] | 681 | struct request *req; |
Christoph Hellwig | adf68f2 | 2015-11-28 15:42:28 +0100 | [diff] [blame] | 682 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 683 | if (++head == nvmeq->q_depth) { |
| 684 | head = 0; |
Matthew Wilcox | 8212346 | 2011-01-20 13:24:06 -0500 | [diff] [blame] | 685 | phase = !phase; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 686 | } |
Christoph Hellwig | adf68f2 | 2015-11-28 15:42:28 +0100 | [diff] [blame] | 687 | |
Jens Axboe | a0fa964 | 2015-11-03 20:37:26 -0700 | [diff] [blame] | 688 | if (tag && *tag == cqe.command_id) |
| 689 | *tag = -1; |
Christoph Hellwig | adf68f2 | 2015-11-28 15:42:28 +0100 | [diff] [blame] | 690 | |
Christoph Hellwig | aae239e | 2015-11-26 12:59:50 +0100 | [diff] [blame] | 691 | if (unlikely(cqe.command_id >= nvmeq->q_depth)) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 692 | dev_warn(nvmeq->dev->ctrl.device, |
Christoph Hellwig | aae239e | 2015-11-26 12:59:50 +0100 | [diff] [blame] | 693 | "invalid id %d completed on queue %d\n", |
| 694 | cqe.command_id, le16_to_cpu(cqe.sq_id)); |
| 695 | continue; |
| 696 | } |
| 697 | |
Christoph Hellwig | adf68f2 | 2015-11-28 15:42:28 +0100 | [diff] [blame] | 698 | /* |
| 699 | * AEN requests are special as they don't time out and can |
| 700 | * survive any kind of queue freeze and often don't respond to |
| 701 | * aborts. We don't even bother to allocate a struct request |
| 702 | * for them but rather special case them here. |
| 703 | */ |
| 704 | if (unlikely(nvmeq->qid == 0 && |
| 705 | cqe.command_id >= NVME_AQ_BLKMQ_DEPTH)) { |
Christoph Hellwig | f866fc4 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 706 | nvme_complete_async_event(&nvmeq->dev->ctrl, &cqe); |
Christoph Hellwig | adf68f2 | 2015-11-28 15:42:28 +0100 | [diff] [blame] | 707 | continue; |
| 708 | } |
| 709 | |
Christoph Hellwig | eee417b | 2015-11-26 13:03:13 +0100 | [diff] [blame] | 710 | req = blk_mq_tag_to_rq(*nvmeq->tags, cqe.command_id); |
Christoph Hellwig | 1cb3cce | 2016-02-29 15:59:47 +0100 | [diff] [blame] | 711 | if (req->cmd_type == REQ_TYPE_DRV_PRIV && req->special) |
| 712 | memcpy(req->special, &cqe, sizeof(cqe)); |
Marta Rybczynska | d783e0b | 2016-03-22 16:02:06 +0100 | [diff] [blame] | 713 | blk_mq_complete_request(req, le16_to_cpu(cqe.status) >> 1); |
Christoph Hellwig | eee417b | 2015-11-26 13:03:13 +0100 | [diff] [blame] | 714 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 715 | } |
| 716 | |
| 717 | /* If the controller ignores the cq head doorbell and continuously |
| 718 | * writes to the queue, it is theoretically possible to wrap around |
| 719 | * the queue twice and mistakenly return IRQ_NONE. Linux only |
| 720 | * requires that 0.1% of your interrupts are handled, so this isn't |
| 721 | * a big problem. |
| 722 | */ |
Matthew Wilcox | 8212346 | 2011-01-20 13:24:06 -0500 | [diff] [blame] | 723 | if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) |
Jens Axboe | a0fa964 | 2015-11-03 20:37:26 -0700 | [diff] [blame] | 724 | return; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 725 | |
Keith Busch | 604e8c8 | 2015-11-20 08:38:13 -0700 | [diff] [blame] | 726 | if (likely(nvmeq->cq_vector >= 0)) |
| 727 | writel(head, nvmeq->q_db + nvmeq->dev->db_stride); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 728 | nvmeq->cq_head = head; |
Matthew Wilcox | 8212346 | 2011-01-20 13:24:06 -0500 | [diff] [blame] | 729 | nvmeq->cq_phase = phase; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 730 | |
Matthew Wilcox | e9539f4 | 2013-06-24 11:47:34 -0400 | [diff] [blame] | 731 | nvmeq->cqe_seen = 1; |
Jens Axboe | a0fa964 | 2015-11-03 20:37:26 -0700 | [diff] [blame] | 732 | } |
| 733 | |
| 734 | static void nvme_process_cq(struct nvme_queue *nvmeq) |
| 735 | { |
| 736 | __nvme_process_cq(nvmeq, NULL); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 737 | } |
| 738 | |
| 739 | static irqreturn_t nvme_irq(int irq, void *data) |
| 740 | { |
Matthew Wilcox | 58ffacb | 2011-02-06 07:28:06 -0500 | [diff] [blame] | 741 | irqreturn_t result; |
| 742 | struct nvme_queue *nvmeq = data; |
| 743 | spin_lock(&nvmeq->q_lock); |
Matthew Wilcox | e9539f4 | 2013-06-24 11:47:34 -0400 | [diff] [blame] | 744 | nvme_process_cq(nvmeq); |
| 745 | result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; |
| 746 | nvmeq->cqe_seen = 0; |
Matthew Wilcox | 58ffacb | 2011-02-06 07:28:06 -0500 | [diff] [blame] | 747 | spin_unlock(&nvmeq->q_lock); |
| 748 | return result; |
| 749 | } |
| 750 | |
| 751 | static irqreturn_t nvme_irq_check(int irq, void *data) |
| 752 | { |
| 753 | struct nvme_queue *nvmeq = data; |
Marta Rybczynska | d783e0b | 2016-03-22 16:02:06 +0100 | [diff] [blame] | 754 | if (nvme_cqe_valid(nvmeq, nvmeq->cq_head, nvmeq->cq_phase)) |
| 755 | return IRQ_WAKE_THREAD; |
| 756 | return IRQ_NONE; |
Matthew Wilcox | 58ffacb | 2011-02-06 07:28:06 -0500 | [diff] [blame] | 757 | } |
| 758 | |
Jens Axboe | a0fa964 | 2015-11-03 20:37:26 -0700 | [diff] [blame] | 759 | static int nvme_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) |
| 760 | { |
| 761 | struct nvme_queue *nvmeq = hctx->driver_data; |
| 762 | |
Marta Rybczynska | d783e0b | 2016-03-22 16:02:06 +0100 | [diff] [blame] | 763 | if (nvme_cqe_valid(nvmeq, nvmeq->cq_head, nvmeq->cq_phase)) { |
Jens Axboe | a0fa964 | 2015-11-03 20:37:26 -0700 | [diff] [blame] | 764 | spin_lock_irq(&nvmeq->q_lock); |
| 765 | __nvme_process_cq(nvmeq, &tag); |
| 766 | spin_unlock_irq(&nvmeq->q_lock); |
| 767 | |
| 768 | if (tag == -1) |
| 769 | return 1; |
| 770 | } |
| 771 | |
| 772 | return 0; |
| 773 | } |
| 774 | |
Christoph Hellwig | f866fc4 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 775 | static void nvme_pci_submit_async_event(struct nvme_ctrl *ctrl, int aer_idx) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 776 | { |
Christoph Hellwig | f866fc4 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 777 | struct nvme_dev *dev = to_nvme_dev(ctrl); |
Christoph Hellwig | 9396dec | 2016-02-29 15:59:44 +0100 | [diff] [blame] | 778 | struct nvme_queue *nvmeq = dev->queues[0]; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 779 | struct nvme_command c; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 780 | |
| 781 | memset(&c, 0, sizeof(c)); |
| 782 | c.common.opcode = nvme_admin_async_event; |
Christoph Hellwig | f866fc4 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 783 | c.common.command_id = NVME_AQ_BLKMQ_DEPTH + aer_idx; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 784 | |
Christoph Hellwig | 9396dec | 2016-02-29 15:59:44 +0100 | [diff] [blame] | 785 | spin_lock_irq(&nvmeq->q_lock); |
Christoph Hellwig | f866fc4 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 786 | __nvme_submit_cmd(nvmeq, &c); |
Christoph Hellwig | 9396dec | 2016-02-29 15:59:44 +0100 | [diff] [blame] | 787 | spin_unlock_irq(&nvmeq->q_lock); |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 788 | } |
| 789 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 790 | static int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) |
| 791 | { |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 792 | struct nvme_command c; |
| 793 | |
| 794 | memset(&c, 0, sizeof(c)); |
| 795 | c.delete_queue.opcode = opcode; |
| 796 | c.delete_queue.qid = cpu_to_le16(id); |
| 797 | |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 798 | return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 799 | } |
| 800 | |
| 801 | static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, |
| 802 | struct nvme_queue *nvmeq) |
| 803 | { |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 804 | struct nvme_command c; |
| 805 | int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; |
| 806 | |
Christoph Hellwig | d29ec82 | 2015-05-22 11:12:46 +0200 | [diff] [blame] | 807 | /* |
| 808 | * Note: we (ab)use the fact the the prp fields survive if no data |
| 809 | * is attached to the request. |
| 810 | */ |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 811 | memset(&c, 0, sizeof(c)); |
| 812 | c.create_cq.opcode = nvme_admin_create_cq; |
| 813 | c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); |
| 814 | c.create_cq.cqid = cpu_to_le16(qid); |
| 815 | c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); |
| 816 | c.create_cq.cq_flags = cpu_to_le16(flags); |
| 817 | c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); |
| 818 | |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 819 | return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 820 | } |
| 821 | |
| 822 | static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, |
| 823 | struct nvme_queue *nvmeq) |
| 824 | { |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 825 | struct nvme_command c; |
| 826 | int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; |
| 827 | |
Christoph Hellwig | d29ec82 | 2015-05-22 11:12:46 +0200 | [diff] [blame] | 828 | /* |
| 829 | * Note: we (ab)use the fact the the prp fields survive if no data |
| 830 | * is attached to the request. |
| 831 | */ |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 832 | memset(&c, 0, sizeof(c)); |
| 833 | c.create_sq.opcode = nvme_admin_create_sq; |
| 834 | c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); |
| 835 | c.create_sq.sqid = cpu_to_le16(qid); |
| 836 | c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); |
| 837 | c.create_sq.sq_flags = cpu_to_le16(flags); |
| 838 | c.create_sq.cqid = cpu_to_le16(qid); |
| 839 | |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 840 | return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 841 | } |
| 842 | |
| 843 | static int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) |
| 844 | { |
| 845 | return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); |
| 846 | } |
| 847 | |
| 848 | static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) |
| 849 | { |
| 850 | return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); |
| 851 | } |
| 852 | |
Christoph Hellwig | e7a2a87 | 2015-11-16 10:39:48 +0100 | [diff] [blame] | 853 | static void abort_endio(struct request *req, int error) |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 854 | { |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 855 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
| 856 | struct nvme_queue *nvmeq = iod->nvmeq; |
Christoph Hellwig | e7a2a87 | 2015-11-16 10:39:48 +0100 | [diff] [blame] | 857 | u16 status = req->errors; |
Matthew Wilcox | bc5fc7e | 2011-09-19 17:08:14 -0400 | [diff] [blame] | 858 | |
Christoph Hellwig | 1cb3cce | 2016-02-29 15:59:47 +0100 | [diff] [blame] | 859 | dev_warn(nvmeq->dev->ctrl.device, "Abort status: 0x%x", status); |
Christoph Hellwig | e7a2a87 | 2015-11-16 10:39:48 +0100 | [diff] [blame] | 860 | atomic_inc(&nvmeq->dev->ctrl.abort_limit); |
Christoph Hellwig | e7a2a87 | 2015-11-16 10:39:48 +0100 | [diff] [blame] | 861 | blk_mq_free_request(req); |
Christoph Hellwig | d29ec82 | 2015-05-22 11:12:46 +0200 | [diff] [blame] | 862 | } |
| 863 | |
Christoph Hellwig | 31c7c7d | 2015-10-22 14:03:35 +0200 | [diff] [blame] | 864 | static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) |
Christoph Hellwig | d29ec82 | 2015-05-22 11:12:46 +0200 | [diff] [blame] | 865 | { |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 866 | struct nvme_iod *iod = blk_mq_rq_to_pdu(req); |
| 867 | struct nvme_queue *nvmeq = iod->nvmeq; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 868 | struct nvme_dev *dev = nvmeq->dev; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 869 | struct request *abort_req; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 870 | struct nvme_command cmd; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 871 | |
Christoph Hellwig | 31c7c7d | 2015-10-22 14:03:35 +0200 | [diff] [blame] | 872 | /* |
Christoph Hellwig | fd634f41 | 2015-11-26 12:42:26 +0100 | [diff] [blame] | 873 | * Shutdown immediately if controller times out while starting. The |
| 874 | * reset work will see the pci device disabled when it gets the forced |
| 875 | * cancellation error. All outstanding requests are completed on |
| 876 | * shutdown, so we return BLK_EH_HANDLED. |
| 877 | */ |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 878 | if (dev->ctrl.state == NVME_CTRL_RESETTING) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 879 | dev_warn(dev->ctrl.device, |
Christoph Hellwig | fd634f41 | 2015-11-26 12:42:26 +0100 | [diff] [blame] | 880 | "I/O %d QID %d timeout, disable controller\n", |
| 881 | req->tag, nvmeq->qid); |
Keith Busch | a5cdb68 | 2016-01-12 14:41:18 -0700 | [diff] [blame] | 882 | nvme_dev_disable(dev, false); |
Christoph Hellwig | fd634f41 | 2015-11-26 12:42:26 +0100 | [diff] [blame] | 883 | req->errors = NVME_SC_CANCELLED; |
| 884 | return BLK_EH_HANDLED; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 885 | } |
| 886 | |
Christoph Hellwig | fd634f41 | 2015-11-26 12:42:26 +0100 | [diff] [blame] | 887 | /* |
| 888 | * Shutdown the controller immediately and schedule a reset if the |
| 889 | * command was already aborted once before and still hasn't been |
| 890 | * returned to the driver, or if this is the admin queue. |
Christoph Hellwig | 31c7c7d | 2015-10-22 14:03:35 +0200 | [diff] [blame] | 891 | */ |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 892 | if (!nvmeq->qid || iod->aborted) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 893 | dev_warn(dev->ctrl.device, |
Keith Busch | e1569a1 | 2015-11-26 12:11:07 +0100 | [diff] [blame] | 894 | "I/O %d QID %d timeout, reset controller\n", |
| 895 | req->tag, nvmeq->qid); |
Keith Busch | a5cdb68 | 2016-01-12 14:41:18 -0700 | [diff] [blame] | 896 | nvme_dev_disable(dev, false); |
Keith Busch | c5f6ce9 | 2016-10-05 16:32:45 -0400 | [diff] [blame] | 897 | nvme_reset(dev); |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 898 | |
Keith Busch | e1569a1 | 2015-11-26 12:11:07 +0100 | [diff] [blame] | 899 | /* |
| 900 | * Mark the request as handled, since the inline shutdown |
| 901 | * forces all outstanding requests to complete. |
| 902 | */ |
| 903 | req->errors = NVME_SC_CANCELLED; |
| 904 | return BLK_EH_HANDLED; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 905 | } |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 906 | |
Christoph Hellwig | f4800d6 | 2015-11-28 15:43:10 +0100 | [diff] [blame] | 907 | iod->aborted = 1; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 908 | |
Christoph Hellwig | e7a2a87 | 2015-11-16 10:39:48 +0100 | [diff] [blame] | 909 | if (atomic_dec_return(&dev->ctrl.abort_limit) < 0) { |
| 910 | atomic_inc(&dev->ctrl.abort_limit); |
| 911 | return BLK_EH_RESET_TIMER; |
| 912 | } |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 913 | |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 914 | memset(&cmd, 0, sizeof(cmd)); |
| 915 | cmd.abort.opcode = nvme_admin_abort_cmd; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 916 | cmd.abort.cid = req->tag; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 917 | cmd.abort.sqid = cpu_to_le16(nvmeq->qid); |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 918 | |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 919 | dev_warn(nvmeq->dev->ctrl.device, |
| 920 | "I/O %d QID %d timeout, aborting\n", |
| 921 | req->tag, nvmeq->qid); |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 922 | |
Christoph Hellwig | e7a2a87 | 2015-11-16 10:39:48 +0100 | [diff] [blame] | 923 | abort_req = nvme_alloc_request(dev->ctrl.admin_q, &cmd, |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 924 | BLK_MQ_REQ_NOWAIT, NVME_QID_ANY); |
Christoph Hellwig | 6bf25d1 | 2015-11-20 09:36:44 +0100 | [diff] [blame] | 925 | if (IS_ERR(abort_req)) { |
| 926 | atomic_inc(&dev->ctrl.abort_limit); |
Christoph Hellwig | 31c7c7d | 2015-10-22 14:03:35 +0200 | [diff] [blame] | 927 | return BLK_EH_RESET_TIMER; |
Christoph Hellwig | 6bf25d1 | 2015-11-20 09:36:44 +0100 | [diff] [blame] | 928 | } |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 929 | |
Christoph Hellwig | e7a2a87 | 2015-11-16 10:39:48 +0100 | [diff] [blame] | 930 | abort_req->timeout = ADMIN_TIMEOUT; |
| 931 | abort_req->end_io_data = NULL; |
| 932 | blk_execute_rq_nowait(abort_req->q, NULL, abort_req, 0, abort_endio); |
Keith Busch | 07836e6 | 2015-02-19 10:34:48 -0700 | [diff] [blame] | 933 | |
Keith Busch | 7a509a6 | 2015-01-07 18:55:53 -0700 | [diff] [blame] | 934 | /* |
| 935 | * The aborted req will be completed on receiving the abort req. |
| 936 | * We enable the timer again. If hit twice, it'll cause a device reset, |
| 937 | * as the device then is in a faulty state. |
| 938 | */ |
Keith Busch | 07836e6 | 2015-02-19 10:34:48 -0700 | [diff] [blame] | 939 | return BLK_EH_RESET_TIMER; |
Matthew Wilcox | a09115b | 2012-08-07 15:56:23 -0400 | [diff] [blame] | 940 | } |
| 941 | |
Keith Busch | f435c28 | 2014-07-07 09:14:42 -0600 | [diff] [blame] | 942 | static void nvme_free_queue(struct nvme_queue *nvmeq) |
Matthew Wilcox | 9e86677 | 2012-08-03 13:55:56 -0400 | [diff] [blame] | 943 | { |
| 944 | dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), |
| 945 | (void *)nvmeq->cqes, nvmeq->cq_dma_addr); |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 946 | if (nvmeq->sq_cmds) |
| 947 | dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), |
Matthew Wilcox | 9e86677 | 2012-08-03 13:55:56 -0400 | [diff] [blame] | 948 | nvmeq->sq_cmds, nvmeq->sq_dma_addr); |
| 949 | kfree(nvmeq); |
| 950 | } |
| 951 | |
Keith Busch | a1a5ef9 | 2013-12-16 13:50:00 -0500 | [diff] [blame] | 952 | static void nvme_free_queues(struct nvme_dev *dev, int lowest) |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 953 | { |
| 954 | int i; |
| 955 | |
Keith Busch | a1a5ef9 | 2013-12-16 13:50:00 -0500 | [diff] [blame] | 956 | for (i = dev->queue_count - 1; i >= lowest; i--) { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 957 | struct nvme_queue *nvmeq = dev->queues[i]; |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 958 | dev->queue_count--; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 959 | dev->queues[i] = NULL; |
Keith Busch | f435c28 | 2014-07-07 09:14:42 -0600 | [diff] [blame] | 960 | nvme_free_queue(nvmeq); |
kaoudis | 121c7ad | 2015-01-14 21:01:58 -0700 | [diff] [blame] | 961 | } |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 962 | } |
| 963 | |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 964 | /** |
| 965 | * nvme_suspend_queue - put queue into suspended state |
| 966 | * @nvmeq - queue to suspend |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 967 | */ |
| 968 | static int nvme_suspend_queue(struct nvme_queue *nvmeq) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 969 | { |
Keith Busch | 2b25d98 | 2014-12-22 12:59:04 -0700 | [diff] [blame] | 970 | int vector; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 971 | |
Matthew Wilcox | a09115b | 2012-08-07 15:56:23 -0400 | [diff] [blame] | 972 | spin_lock_irq(&nvmeq->q_lock); |
Keith Busch | 2b25d98 | 2014-12-22 12:59:04 -0700 | [diff] [blame] | 973 | if (nvmeq->cq_vector == -1) { |
| 974 | spin_unlock_irq(&nvmeq->q_lock); |
| 975 | return 1; |
| 976 | } |
Christoph Hellwig | dca51e7 | 2016-09-14 16:18:57 +0200 | [diff] [blame] | 977 | vector = nvmeq_irq(nvmeq); |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 978 | nvmeq->dev->online_queues--; |
Keith Busch | 2b25d98 | 2014-12-22 12:59:04 -0700 | [diff] [blame] | 979 | nvmeq->cq_vector = -1; |
Matthew Wilcox | a09115b | 2012-08-07 15:56:23 -0400 | [diff] [blame] | 980 | spin_unlock_irq(&nvmeq->q_lock); |
| 981 | |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 982 | if (!nvmeq->qid && nvmeq->dev->ctrl.admin_q) |
Keith Busch | 2564626 | 2016-01-04 09:10:57 -0700 | [diff] [blame] | 983 | blk_mq_stop_hw_queues(nvmeq->dev->ctrl.admin_q); |
Keith Busch | 6df3dbc | 2015-03-26 13:49:33 -0600 | [diff] [blame] | 984 | |
Matthew Wilcox | aba2080 | 2011-03-27 08:52:06 -0400 | [diff] [blame] | 985 | free_irq(vector, nvmeq); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 986 | |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 987 | return 0; |
| 988 | } |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 989 | |
Keith Busch | a5cdb68 | 2016-01-12 14:41:18 -0700 | [diff] [blame] | 990 | static void nvme_disable_admin_queue(struct nvme_dev *dev, bool shutdown) |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 991 | { |
Keith Busch | a5cdb68 | 2016-01-12 14:41:18 -0700 | [diff] [blame] | 992 | struct nvme_queue *nvmeq = dev->queues[0]; |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 993 | |
| 994 | if (!nvmeq) |
| 995 | return; |
| 996 | if (nvme_suspend_queue(nvmeq)) |
| 997 | return; |
| 998 | |
Keith Busch | a5cdb68 | 2016-01-12 14:41:18 -0700 | [diff] [blame] | 999 | if (shutdown) |
| 1000 | nvme_shutdown_ctrl(&dev->ctrl); |
| 1001 | else |
| 1002 | nvme_disable_ctrl(&dev->ctrl, lo_hi_readq( |
| 1003 | dev->bar + NVME_REG_CAP)); |
Keith Busch | 07836e6 | 2015-02-19 10:34:48 -0700 | [diff] [blame] | 1004 | |
| 1005 | spin_lock_irq(&nvmeq->q_lock); |
| 1006 | nvme_process_cq(nvmeq); |
| 1007 | spin_unlock_irq(&nvmeq->q_lock); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1008 | } |
| 1009 | |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 1010 | static int nvme_cmb_qdepth(struct nvme_dev *dev, int nr_io_queues, |
| 1011 | int entry_size) |
| 1012 | { |
| 1013 | int q_depth = dev->q_depth; |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1014 | unsigned q_size_aligned = roundup(q_depth * entry_size, |
| 1015 | dev->ctrl.page_size); |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 1016 | |
| 1017 | if (q_size_aligned * nr_io_queues > dev->cmb_size) { |
Jon Derrick | c45f5c9 | 2015-07-21 15:08:13 -0600 | [diff] [blame] | 1018 | u64 mem_per_q = div_u64(dev->cmb_size, nr_io_queues); |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1019 | mem_per_q = round_down(mem_per_q, dev->ctrl.page_size); |
Jon Derrick | c45f5c9 | 2015-07-21 15:08:13 -0600 | [diff] [blame] | 1020 | q_depth = div_u64(mem_per_q, entry_size); |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 1021 | |
| 1022 | /* |
| 1023 | * Ensure the reduced q_depth is above some threshold where it |
| 1024 | * would be better to map queues in system memory with the |
| 1025 | * original depth |
| 1026 | */ |
| 1027 | if (q_depth < 64) |
| 1028 | return -ENOMEM; |
| 1029 | } |
| 1030 | |
| 1031 | return q_depth; |
| 1032 | } |
| 1033 | |
| 1034 | static int nvme_alloc_sq_cmds(struct nvme_dev *dev, struct nvme_queue *nvmeq, |
| 1035 | int qid, int depth) |
| 1036 | { |
| 1037 | if (qid && dev->cmb && use_cmb_sqes && NVME_CMB_SQS(dev->cmbsz)) { |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1038 | unsigned offset = (qid - 1) * roundup(SQ_SIZE(depth), |
| 1039 | dev->ctrl.page_size); |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 1040 | nvmeq->sq_dma_addr = dev->cmb_dma_addr + offset; |
| 1041 | nvmeq->sq_cmds_io = dev->cmb + offset; |
| 1042 | } else { |
| 1043 | nvmeq->sq_cmds = dma_alloc_coherent(dev->dev, SQ_SIZE(depth), |
| 1044 | &nvmeq->sq_dma_addr, GFP_KERNEL); |
| 1045 | if (!nvmeq->sq_cmds) |
| 1046 | return -ENOMEM; |
| 1047 | } |
| 1048 | |
| 1049 | return 0; |
| 1050 | } |
| 1051 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1052 | 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] | 1053 | int depth) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1054 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1055 | struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq), GFP_KERNEL); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1056 | if (!nvmeq) |
| 1057 | return NULL; |
| 1058 | |
Christoph Hellwig | e75ec75 | 2015-05-22 11:12:39 +0200 | [diff] [blame] | 1059 | nvmeq->cqes = dma_zalloc_coherent(dev->dev, CQ_SIZE(depth), |
Joe Perches | 4d51abf | 2014-06-15 13:37:33 -0700 | [diff] [blame] | 1060 | &nvmeq->cq_dma_addr, GFP_KERNEL); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1061 | if (!nvmeq->cqes) |
| 1062 | goto free_nvmeq; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1063 | |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 1064 | if (nvme_alloc_sq_cmds(dev, nvmeq, qid, depth)) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1065 | goto free_cqdma; |
| 1066 | |
Christoph Hellwig | e75ec75 | 2015-05-22 11:12:39 +0200 | [diff] [blame] | 1067 | nvmeq->q_dmadev = dev->dev; |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 1068 | nvmeq->dev = dev; |
Matthew Wilcox | 3193f07 | 2014-01-27 15:57:22 -0500 | [diff] [blame] | 1069 | snprintf(nvmeq->irqname, sizeof(nvmeq->irqname), "nvme%dq%d", |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 1070 | dev->ctrl.instance, qid); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1071 | spin_lock_init(&nvmeq->q_lock); |
| 1072 | nvmeq->cq_head = 0; |
Matthew Wilcox | 8212346 | 2011-01-20 13:24:06 -0500 | [diff] [blame] | 1073 | nvmeq->cq_phase = 1; |
Haiyan Hu | b80d5cc | 2013-09-10 11:25:37 +0800 | [diff] [blame] | 1074 | nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1075 | nvmeq->q_depth = depth; |
Keith Busch | c30341d | 2013-12-10 13:10:38 -0700 | [diff] [blame] | 1076 | nvmeq->qid = qid; |
Jon Derrick | 758dd7f | 2015-06-30 11:22:52 -0600 | [diff] [blame] | 1077 | nvmeq->cq_vector = -1; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1078 | dev->queues[qid] = nvmeq; |
Jon Derrick | 36a7e99 | 2015-05-27 12:26:23 -0600 | [diff] [blame] | 1079 | dev->queue_count++; |
| 1080 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1081 | return nvmeq; |
| 1082 | |
| 1083 | free_cqdma: |
Christoph Hellwig | e75ec75 | 2015-05-22 11:12:39 +0200 | [diff] [blame] | 1084 | dma_free_coherent(dev->dev, CQ_SIZE(depth), (void *)nvmeq->cqes, |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1085 | nvmeq->cq_dma_addr); |
| 1086 | free_nvmeq: |
| 1087 | kfree(nvmeq); |
| 1088 | return NULL; |
| 1089 | } |
| 1090 | |
Christoph Hellwig | dca51e7 | 2016-09-14 16:18:57 +0200 | [diff] [blame] | 1091 | static int queue_request_irq(struct nvme_queue *nvmeq) |
Matthew Wilcox | 3001082 | 2011-01-20 09:10:15 -0500 | [diff] [blame] | 1092 | { |
Matthew Wilcox | 58ffacb | 2011-02-06 07:28:06 -0500 | [diff] [blame] | 1093 | if (use_threaded_interrupts) |
Christoph Hellwig | dca51e7 | 2016-09-14 16:18:57 +0200 | [diff] [blame] | 1094 | return request_threaded_irq(nvmeq_irq(nvmeq), nvme_irq_check, |
| 1095 | nvme_irq, IRQF_SHARED, nvmeq->irqname, nvmeq); |
| 1096 | else |
| 1097 | return request_irq(nvmeq_irq(nvmeq), nvme_irq, IRQF_SHARED, |
| 1098 | nvmeq->irqname, nvmeq); |
Matthew Wilcox | 3001082 | 2011-01-20 09:10:15 -0500 | [diff] [blame] | 1099 | } |
| 1100 | |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1101 | static void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1102 | { |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1103 | struct nvme_dev *dev = nvmeq->dev; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1104 | |
Keith Busch | 7be50e9 | 2014-09-10 15:48:47 -0600 | [diff] [blame] | 1105 | spin_lock_irq(&nvmeq->q_lock); |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1106 | nvmeq->sq_tail = 0; |
| 1107 | nvmeq->cq_head = 0; |
| 1108 | nvmeq->cq_phase = 1; |
Haiyan Hu | b80d5cc | 2013-09-10 11:25:37 +0800 | [diff] [blame] | 1109 | nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1110 | memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 1111 | dev->online_queues++; |
Keith Busch | 7be50e9 | 2014-09-10 15:48:47 -0600 | [diff] [blame] | 1112 | spin_unlock_irq(&nvmeq->q_lock); |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1113 | } |
| 1114 | |
| 1115 | static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) |
| 1116 | { |
| 1117 | struct nvme_dev *dev = nvmeq->dev; |
| 1118 | int result; |
Matthew Wilcox | 3f85d50 | 2011-02-01 08:39:04 -0500 | [diff] [blame] | 1119 | |
Keith Busch | 2b25d98 | 2014-12-22 12:59:04 -0700 | [diff] [blame] | 1120 | nvmeq->cq_vector = qid - 1; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1121 | result = adapter_alloc_cq(dev, qid, nvmeq); |
| 1122 | if (result < 0) |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1123 | return result; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1124 | |
| 1125 | result = adapter_alloc_sq(dev, qid, nvmeq); |
| 1126 | if (result < 0) |
| 1127 | goto release_cq; |
| 1128 | |
Christoph Hellwig | dca51e7 | 2016-09-14 16:18:57 +0200 | [diff] [blame] | 1129 | result = queue_request_irq(nvmeq); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1130 | if (result < 0) |
| 1131 | goto release_sq; |
| 1132 | |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1133 | nvme_init_queue(nvmeq, qid); |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1134 | return result; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1135 | |
| 1136 | release_sq: |
| 1137 | adapter_delete_sq(dev, qid); |
| 1138 | release_cq: |
| 1139 | adapter_delete_cq(dev, qid); |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1140 | return result; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1141 | } |
| 1142 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1143 | static struct blk_mq_ops nvme_mq_admin_ops = { |
Christoph Hellwig | d29ec82 | 2015-05-22 11:12:46 +0200 | [diff] [blame] | 1144 | .queue_rq = nvme_queue_rq, |
Christoph Hellwig | eee417b | 2015-11-26 13:03:13 +0100 | [diff] [blame] | 1145 | .complete = nvme_complete_rq, |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1146 | .init_hctx = nvme_admin_init_hctx, |
Keith Busch | 4af0e21 | 2015-06-08 10:08:13 -0600 | [diff] [blame] | 1147 | .exit_hctx = nvme_admin_exit_hctx, |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1148 | .init_request = nvme_admin_init_request, |
| 1149 | .timeout = nvme_timeout, |
| 1150 | }; |
| 1151 | |
| 1152 | static struct blk_mq_ops nvme_mq_ops = { |
| 1153 | .queue_rq = nvme_queue_rq, |
Christoph Hellwig | eee417b | 2015-11-26 13:03:13 +0100 | [diff] [blame] | 1154 | .complete = nvme_complete_rq, |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1155 | .init_hctx = nvme_init_hctx, |
| 1156 | .init_request = nvme_init_request, |
Christoph Hellwig | dca51e7 | 2016-09-14 16:18:57 +0200 | [diff] [blame] | 1157 | .map_queues = nvme_pci_map_queues, |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1158 | .timeout = nvme_timeout, |
Jens Axboe | a0fa964 | 2015-11-03 20:37:26 -0700 | [diff] [blame] | 1159 | .poll = nvme_poll, |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1160 | }; |
| 1161 | |
Keith Busch | ea191d2 | 2015-01-07 18:55:49 -0700 | [diff] [blame] | 1162 | static void nvme_dev_remove_admin(struct nvme_dev *dev) |
| 1163 | { |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 1164 | if (dev->ctrl.admin_q && !blk_queue_dying(dev->ctrl.admin_q)) { |
Keith Busch | 69d9a99 | 2016-02-24 09:15:56 -0700 | [diff] [blame] | 1165 | /* |
| 1166 | * If the controller was reset during removal, it's possible |
| 1167 | * user requests may be waiting on a stopped queue. Start the |
| 1168 | * queue to flush these to completion. |
| 1169 | */ |
| 1170 | blk_mq_start_stopped_hw_queues(dev->ctrl.admin_q, true); |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 1171 | blk_cleanup_queue(dev->ctrl.admin_q); |
Keith Busch | ea191d2 | 2015-01-07 18:55:49 -0700 | [diff] [blame] | 1172 | blk_mq_free_tag_set(&dev->admin_tagset); |
| 1173 | } |
| 1174 | } |
| 1175 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1176 | static int nvme_alloc_admin_tags(struct nvme_dev *dev) |
| 1177 | { |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 1178 | if (!dev->ctrl.admin_q) { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1179 | dev->admin_tagset.ops = &nvme_mq_admin_ops; |
| 1180 | dev->admin_tagset.nr_hw_queues = 1; |
Keith Busch | e3e9d50 | 2016-01-04 09:10:55 -0700 | [diff] [blame] | 1181 | |
| 1182 | /* |
| 1183 | * Subtract one to leave an empty queue entry for 'Full Queue' |
| 1184 | * condition. See NVM-Express 1.2 specification, section 4.1.2. |
| 1185 | */ |
| 1186 | dev->admin_tagset.queue_depth = NVME_AQ_BLKMQ_DEPTH - 1; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1187 | dev->admin_tagset.timeout = ADMIN_TIMEOUT; |
Christoph Hellwig | e75ec75 | 2015-05-22 11:12:39 +0200 | [diff] [blame] | 1188 | dev->admin_tagset.numa_node = dev_to_node(dev->dev); |
Jens Axboe | ac3dd5b | 2015-01-22 12:07:58 -0700 | [diff] [blame] | 1189 | dev->admin_tagset.cmd_size = nvme_cmd_size(dev); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1190 | dev->admin_tagset.driver_data = dev; |
| 1191 | |
| 1192 | if (blk_mq_alloc_tag_set(&dev->admin_tagset)) |
| 1193 | return -ENOMEM; |
| 1194 | |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 1195 | dev->ctrl.admin_q = blk_mq_init_queue(&dev->admin_tagset); |
| 1196 | if (IS_ERR(dev->ctrl.admin_q)) { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1197 | blk_mq_free_tag_set(&dev->admin_tagset); |
| 1198 | return -ENOMEM; |
| 1199 | } |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 1200 | if (!blk_get_queue(dev->ctrl.admin_q)) { |
Keith Busch | ea191d2 | 2015-01-07 18:55:49 -0700 | [diff] [blame] | 1201 | nvme_dev_remove_admin(dev); |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 1202 | dev->ctrl.admin_q = NULL; |
Keith Busch | ea191d2 | 2015-01-07 18:55:49 -0700 | [diff] [blame] | 1203 | return -ENODEV; |
| 1204 | } |
Keith Busch | 0fb59cb | 2015-01-07 18:55:50 -0700 | [diff] [blame] | 1205 | } else |
Keith Busch | 2564626 | 2016-01-04 09:10:57 -0700 | [diff] [blame] | 1206 | blk_mq_start_stopped_hw_queues(dev->ctrl.admin_q, true); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1207 | |
| 1208 | return 0; |
| 1209 | } |
| 1210 | |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 1211 | static int nvme_configure_admin_queue(struct nvme_dev *dev) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1212 | { |
Matthew Wilcox | ba47e38 | 2013-05-04 06:43:16 -0400 | [diff] [blame] | 1213 | int result; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1214 | u32 aqa; |
Christoph Hellwig | 7a67cbe | 2015-11-20 08:58:10 +0100 | [diff] [blame] | 1215 | u64 cap = lo_hi_readq(dev->bar + NVME_REG_CAP); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1216 | struct nvme_queue *nvmeq; |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 1217 | |
Gabriel Krisman Bertazi | 8ef2074 | 2016-10-19 09:51:05 -0600 | [diff] [blame] | 1218 | dev->subsystem = readl(dev->bar + NVME_REG_VS) >= NVME_VS(1, 1, 0) ? |
Keith Busch | dfbac8c | 2015-08-10 15:20:40 -0600 | [diff] [blame] | 1219 | NVME_CAP_NSSRC(cap) : 0; |
| 1220 | |
Christoph Hellwig | 7a67cbe | 2015-11-20 08:58:10 +0100 | [diff] [blame] | 1221 | if (dev->subsystem && |
| 1222 | (readl(dev->bar + NVME_REG_CSTS) & NVME_CSTS_NSSRO)) |
| 1223 | writel(NVME_CSTS_NSSRO, dev->bar + NVME_REG_CSTS); |
Keith Busch | dfbac8c | 2015-08-10 15:20:40 -0600 | [diff] [blame] | 1224 | |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1225 | result = nvme_disable_ctrl(&dev->ctrl, cap); |
Matthew Wilcox | ba47e38 | 2013-05-04 06:43:16 -0400 | [diff] [blame] | 1226 | if (result < 0) |
| 1227 | return result; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1228 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1229 | nvmeq = dev->queues[0]; |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 1230 | if (!nvmeq) { |
Keith Busch | 2b25d98 | 2014-12-22 12:59:04 -0700 | [diff] [blame] | 1231 | nvmeq = nvme_alloc_queue(dev, 0, NVME_AQ_DEPTH); |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 1232 | if (!nvmeq) |
| 1233 | return -ENOMEM; |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 1234 | } |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1235 | |
| 1236 | aqa = nvmeq->q_depth - 1; |
| 1237 | aqa |= aqa << 16; |
| 1238 | |
Christoph Hellwig | 7a67cbe | 2015-11-20 08:58:10 +0100 | [diff] [blame] | 1239 | writel(aqa, dev->bar + NVME_REG_AQA); |
| 1240 | lo_hi_writeq(nvmeq->sq_dma_addr, dev->bar + NVME_REG_ASQ); |
| 1241 | lo_hi_writeq(nvmeq->cq_dma_addr, dev->bar + NVME_REG_ACQ); |
Keith Busch | 1d09062 | 2014-06-23 11:34:01 -0600 | [diff] [blame] | 1242 | |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1243 | result = nvme_enable_ctrl(&dev->ctrl, cap); |
Keith Busch | 025c557 | 2013-05-01 13:07:51 -0600 | [diff] [blame] | 1244 | if (result) |
Keith Busch | d487562 | 2016-11-15 15:56:26 -0500 | [diff] [blame] | 1245 | return result; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1246 | |
Keith Busch | 2b25d98 | 2014-12-22 12:59:04 -0700 | [diff] [blame] | 1247 | nvmeq->cq_vector = 0; |
Christoph Hellwig | dca51e7 | 2016-09-14 16:18:57 +0200 | [diff] [blame] | 1248 | result = queue_request_irq(nvmeq); |
Jon Derrick | 758dd7f | 2015-06-30 11:22:52 -0600 | [diff] [blame] | 1249 | if (result) { |
| 1250 | nvmeq->cq_vector = -1; |
Keith Busch | d487562 | 2016-11-15 15:56:26 -0500 | [diff] [blame] | 1251 | return result; |
Jon Derrick | 758dd7f | 2015-06-30 11:22:52 -0600 | [diff] [blame] | 1252 | } |
Keith Busch | 025c557 | 2013-05-01 13:07:51 -0600 | [diff] [blame] | 1253 | |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1254 | return result; |
| 1255 | } |
| 1256 | |
Guilherme G. Piccoli | c875a70 | 2016-04-13 11:08:20 -0300 | [diff] [blame] | 1257 | static bool nvme_should_reset(struct nvme_dev *dev, u32 csts) |
| 1258 | { |
| 1259 | |
| 1260 | /* If true, indicates loss of adapter communication, possibly by a |
| 1261 | * NVMe Subsystem reset. |
| 1262 | */ |
| 1263 | bool nssro = dev->subsystem && (csts & NVME_CSTS_NSSRO); |
| 1264 | |
| 1265 | /* If there is a reset ongoing, we shouldn't reset again. */ |
| 1266 | if (work_busy(&dev->reset_work)) |
| 1267 | return false; |
| 1268 | |
| 1269 | /* We shouldn't reset unless the controller is on fatal error state |
| 1270 | * _or_ if we lost the communication with it. |
| 1271 | */ |
| 1272 | if (!(csts & NVME_CSTS_CFS) && !nssro) |
| 1273 | return false; |
| 1274 | |
| 1275 | /* If PCI error recovery process is happening, we cannot reset or |
| 1276 | * the recovery mechanism will surely fail. |
| 1277 | */ |
| 1278 | if (pci_channel_offline(to_pci_dev(dev->dev))) |
| 1279 | return false; |
| 1280 | |
| 1281 | return true; |
| 1282 | } |
| 1283 | |
Christoph Hellwig | 2d55cd5 | 2016-02-29 15:59:46 +0100 | [diff] [blame] | 1284 | static void nvme_watchdog_timer(unsigned long data) |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 1285 | { |
Christoph Hellwig | 2d55cd5 | 2016-02-29 15:59:46 +0100 | [diff] [blame] | 1286 | struct nvme_dev *dev = (struct nvme_dev *)data; |
| 1287 | u32 csts = readl(dev->bar + NVME_REG_CSTS); |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 1288 | |
Guilherme G. Piccoli | c875a70 | 2016-04-13 11:08:20 -0300 | [diff] [blame] | 1289 | /* Skip controllers under certain specific conditions. */ |
| 1290 | if (nvme_should_reset(dev, csts)) { |
Keith Busch | c5f6ce9 | 2016-10-05 16:32:45 -0400 | [diff] [blame] | 1291 | if (!nvme_reset(dev)) |
Christoph Hellwig | 2d55cd5 | 2016-02-29 15:59:46 +0100 | [diff] [blame] | 1292 | dev_warn(dev->dev, |
| 1293 | "Failed status: 0x%x, reset controller.\n", |
| 1294 | csts); |
Christoph Hellwig | 2d55cd5 | 2016-02-29 15:59:46 +0100 | [diff] [blame] | 1295 | return; |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 1296 | } |
Christoph Hellwig | 2d55cd5 | 2016-02-29 15:59:46 +0100 | [diff] [blame] | 1297 | |
| 1298 | mod_timer(&dev->watchdog_timer, round_jiffies(jiffies + HZ)); |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 1299 | } |
| 1300 | |
Christoph Hellwig | 749941f | 2015-11-26 11:46:39 +0100 | [diff] [blame] | 1301 | static int nvme_create_io_queues(struct nvme_dev *dev) |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 1302 | { |
Keith Busch | 949928c | 2015-12-17 17:08:15 -0700 | [diff] [blame] | 1303 | unsigned i, max; |
Christoph Hellwig | 749941f | 2015-11-26 11:46:39 +0100 | [diff] [blame] | 1304 | int ret = 0; |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 1305 | |
Christoph Hellwig | 749941f | 2015-11-26 11:46:39 +0100 | [diff] [blame] | 1306 | for (i = dev->queue_count; i <= dev->max_qid; i++) { |
| 1307 | if (!nvme_alloc_queue(dev, i, dev->q_depth)) { |
| 1308 | ret = -ENOMEM; |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 1309 | break; |
Christoph Hellwig | 749941f | 2015-11-26 11:46:39 +0100 | [diff] [blame] | 1310 | } |
| 1311 | } |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 1312 | |
Keith Busch | 949928c | 2015-12-17 17:08:15 -0700 | [diff] [blame] | 1313 | max = min(dev->max_qid, dev->queue_count - 1); |
| 1314 | for (i = dev->online_queues; i <= max; i++) { |
Christoph Hellwig | 749941f | 2015-11-26 11:46:39 +0100 | [diff] [blame] | 1315 | ret = nvme_create_queue(dev->queues[i], i); |
Keith Busch | d487562 | 2016-11-15 15:56:26 -0500 | [diff] [blame] | 1316 | if (ret) |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 1317 | break; |
Matthew Wilcox | 27e8166 | 2014-04-11 11:58:45 -0400 | [diff] [blame] | 1318 | } |
Christoph Hellwig | 749941f | 2015-11-26 11:46:39 +0100 | [diff] [blame] | 1319 | |
| 1320 | /* |
| 1321 | * Ignore failing Create SQ/CQ commands, we can continue with less |
| 1322 | * than the desired aount of queues, and even a controller without |
| 1323 | * I/O queues an still be used to issue admin commands. This might |
| 1324 | * be useful to upgrade a buggy firmware for example. |
| 1325 | */ |
| 1326 | return ret >= 0 ? 0 : ret; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1327 | } |
| 1328 | |
Stephen Bates | 202021c | 2016-10-05 20:01:12 -0600 | [diff] [blame] | 1329 | static ssize_t nvme_cmb_show(struct device *dev, |
| 1330 | struct device_attribute *attr, |
| 1331 | char *buf) |
| 1332 | { |
| 1333 | struct nvme_dev *ndev = to_nvme_dev(dev_get_drvdata(dev)); |
| 1334 | |
| 1335 | return snprintf(buf, PAGE_SIZE, "cmbloc : x%08x\ncmbsz : x%08x\n", |
| 1336 | ndev->cmbloc, ndev->cmbsz); |
| 1337 | } |
| 1338 | static DEVICE_ATTR(cmb, S_IRUGO, nvme_cmb_show, NULL); |
| 1339 | |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 1340 | static void __iomem *nvme_map_cmb(struct nvme_dev *dev) |
| 1341 | { |
| 1342 | u64 szu, size, offset; |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 1343 | resource_size_t bar_size; |
| 1344 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
| 1345 | void __iomem *cmb; |
| 1346 | dma_addr_t dma_addr; |
| 1347 | |
Christoph Hellwig | 7a67cbe | 2015-11-20 08:58:10 +0100 | [diff] [blame] | 1348 | dev->cmbsz = readl(dev->bar + NVME_REG_CMBSZ); |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 1349 | if (!(NVME_CMB_SZ(dev->cmbsz))) |
| 1350 | return NULL; |
Stephen Bates | 202021c | 2016-10-05 20:01:12 -0600 | [diff] [blame] | 1351 | dev->cmbloc = readl(dev->bar + NVME_REG_CMBLOC); |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 1352 | |
Stephen Bates | 202021c | 2016-10-05 20:01:12 -0600 | [diff] [blame] | 1353 | if (!use_cmb_sqes) |
| 1354 | return NULL; |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 1355 | |
| 1356 | szu = (u64)1 << (12 + 4 * NVME_CMB_SZU(dev->cmbsz)); |
| 1357 | size = szu * NVME_CMB_SZ(dev->cmbsz); |
Stephen Bates | 202021c | 2016-10-05 20:01:12 -0600 | [diff] [blame] | 1358 | offset = szu * NVME_CMB_OFST(dev->cmbloc); |
| 1359 | bar_size = pci_resource_len(pdev, NVME_CMB_BIR(dev->cmbloc)); |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 1360 | |
| 1361 | if (offset > bar_size) |
| 1362 | return NULL; |
| 1363 | |
| 1364 | /* |
| 1365 | * Controllers may support a CMB size larger than their BAR, |
| 1366 | * for example, due to being behind a bridge. Reduce the CMB to |
| 1367 | * the reported size of the BAR |
| 1368 | */ |
| 1369 | if (size > bar_size - offset) |
| 1370 | size = bar_size - offset; |
| 1371 | |
Stephen Bates | 202021c | 2016-10-05 20:01:12 -0600 | [diff] [blame] | 1372 | dma_addr = pci_resource_start(pdev, NVME_CMB_BIR(dev->cmbloc)) + offset; |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 1373 | cmb = ioremap_wc(dma_addr, size); |
| 1374 | if (!cmb) |
| 1375 | return NULL; |
| 1376 | |
| 1377 | dev->cmb_dma_addr = dma_addr; |
| 1378 | dev->cmb_size = size; |
| 1379 | return cmb; |
| 1380 | } |
| 1381 | |
| 1382 | static inline void nvme_release_cmb(struct nvme_dev *dev) |
| 1383 | { |
| 1384 | if (dev->cmb) { |
| 1385 | iounmap(dev->cmb); |
| 1386 | dev->cmb = NULL; |
Jon Derrick | 6d6a43a | 2017-05-05 14:52:06 -0600 | [diff] [blame] | 1387 | if (dev->cmbsz) { |
| 1388 | sysfs_remove_file_from_group(&dev->ctrl.device->kobj, |
| 1389 | &dev_attr_cmb.attr, NULL); |
| 1390 | dev->cmbsz = 0; |
| 1391 | } |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 1392 | } |
| 1393 | } |
| 1394 | |
Keith Busch | 9d713c2 | 2013-07-15 15:02:24 -0600 | [diff] [blame] | 1395 | static size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) |
| 1396 | { |
Haiyan Hu | b80d5cc | 2013-09-10 11:25:37 +0800 | [diff] [blame] | 1397 | return 4096 + ((nr_io_queues + 1) * 8 * dev->db_stride); |
Keith Busch | 9d713c2 | 2013-07-15 15:02:24 -0600 | [diff] [blame] | 1398 | } |
| 1399 | |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 1400 | static int nvme_setup_io_queues(struct nvme_dev *dev) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1401 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1402 | struct nvme_queue *adminq = dev->queues[0]; |
Christoph Hellwig | e75ec75 | 2015-05-22 11:12:39 +0200 | [diff] [blame] | 1403 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
Christoph Hellwig | dca51e7 | 2016-09-14 16:18:57 +0200 | [diff] [blame] | 1404 | int result, nr_io_queues, size; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1405 | |
Keith Busch | 2800b8e | 2016-05-13 12:38:09 -0600 | [diff] [blame] | 1406 | nr_io_queues = num_online_cpus(); |
Christoph Hellwig | 9a0be7a | 2015-11-26 11:09:06 +0100 | [diff] [blame] | 1407 | result = nvme_set_queue_count(&dev->ctrl, &nr_io_queues); |
| 1408 | if (result < 0) |
Matthew Wilcox | 1b23484 | 2011-01-20 13:01:49 -0500 | [diff] [blame] | 1409 | return result; |
Christoph Hellwig | 9a0be7a | 2015-11-26 11:09:06 +0100 | [diff] [blame] | 1410 | |
Christoph Hellwig | f5fa90d | 2016-06-06 23:20:50 +0200 | [diff] [blame] | 1411 | if (nr_io_queues == 0) |
Keith Busch | a522905 | 2016-04-08 16:09:10 -0600 | [diff] [blame] | 1412 | return 0; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1413 | |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 1414 | if (dev->cmb && NVME_CMB_SQS(dev->cmbsz)) { |
| 1415 | result = nvme_cmb_qdepth(dev, nr_io_queues, |
| 1416 | sizeof(struct nvme_command)); |
| 1417 | if (result > 0) |
| 1418 | dev->q_depth = result; |
| 1419 | else |
| 1420 | nvme_release_cmb(dev); |
| 1421 | } |
| 1422 | |
Keith Busch | 9d713c2 | 2013-07-15 15:02:24 -0600 | [diff] [blame] | 1423 | size = db_bar_size(dev, nr_io_queues); |
| 1424 | if (size > 8192) { |
Matthew Wilcox | f1938f6 | 2011-10-20 17:00:41 -0400 | [diff] [blame] | 1425 | iounmap(dev->bar); |
Keith Busch | 9d713c2 | 2013-07-15 15:02:24 -0600 | [diff] [blame] | 1426 | do { |
| 1427 | dev->bar = ioremap(pci_resource_start(pdev, 0), size); |
| 1428 | if (dev->bar) |
| 1429 | break; |
| 1430 | if (!--nr_io_queues) |
| 1431 | return -ENOMEM; |
| 1432 | size = db_bar_size(dev, nr_io_queues); |
| 1433 | } while (1); |
Christoph Hellwig | 7a67cbe | 2015-11-20 08:58:10 +0100 | [diff] [blame] | 1434 | dev->dbs = dev->bar + 4096; |
Keith Busch | 5a92e70 | 2014-02-21 14:13:44 -0700 | [diff] [blame] | 1435 | adminq->q_db = dev->dbs; |
Matthew Wilcox | f1938f6 | 2011-10-20 17:00:41 -0400 | [diff] [blame] | 1436 | } |
| 1437 | |
Keith Busch | 9d713c2 | 2013-07-15 15:02:24 -0600 | [diff] [blame] | 1438 | /* Deregister the admin queue's interrupt */ |
Christoph Hellwig | dca51e7 | 2016-09-14 16:18:57 +0200 | [diff] [blame] | 1439 | free_irq(pci_irq_vector(pdev, 0), adminq); |
Keith Busch | 9d713c2 | 2013-07-15 15:02:24 -0600 | [diff] [blame] | 1440 | |
Jens Axboe | e32efbf | 2014-11-14 09:49:26 -0700 | [diff] [blame] | 1441 | /* |
| 1442 | * If we enable msix early due to not intx, disable it again before |
| 1443 | * setting up the full range we need. |
| 1444 | */ |
Christoph Hellwig | dca51e7 | 2016-09-14 16:18:57 +0200 | [diff] [blame] | 1445 | pci_free_irq_vectors(pdev); |
| 1446 | nr_io_queues = pci_alloc_irq_vectors(pdev, 1, nr_io_queues, |
| 1447 | PCI_IRQ_ALL_TYPES | PCI_IRQ_AFFINITY); |
| 1448 | if (nr_io_queues <= 0) |
| 1449 | return -EIO; |
| 1450 | dev->max_qid = nr_io_queues; |
Matthew Wilcox | 1b23484 | 2011-01-20 13:01:49 -0500 | [diff] [blame] | 1451 | |
Matthew Wilcox | 063a809 | 2013-06-20 10:53:48 -0400 | [diff] [blame] | 1452 | /* |
| 1453 | * Should investigate if there's a performance win from allocating |
| 1454 | * more queues than interrupt vectors; it might allow the submission |
| 1455 | * path to scale better, even if the receive path is limited by the |
| 1456 | * number of interrupts. |
| 1457 | */ |
Ramachandra Rao Gajula | fa08a39 | 2013-05-11 15:19:31 -0700 | [diff] [blame] | 1458 | |
Christoph Hellwig | dca51e7 | 2016-09-14 16:18:57 +0200 | [diff] [blame] | 1459 | result = queue_request_irq(adminq); |
Jon Derrick | 758dd7f | 2015-06-30 11:22:52 -0600 | [diff] [blame] | 1460 | if (result) { |
| 1461 | adminq->cq_vector = -1; |
Keith Busch | d487562 | 2016-11-15 15:56:26 -0500 | [diff] [blame] | 1462 | return result; |
Jon Derrick | 758dd7f | 2015-06-30 11:22:52 -0600 | [diff] [blame] | 1463 | } |
Christoph Hellwig | 749941f | 2015-11-26 11:46:39 +0100 | [diff] [blame] | 1464 | return nvme_create_io_queues(dev); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1465 | } |
| 1466 | |
Keith Busch | db3cbff | 2016-01-12 14:41:17 -0700 | [diff] [blame] | 1467 | static void nvme_del_queue_end(struct request *req, int error) |
| 1468 | { |
| 1469 | struct nvme_queue *nvmeq = req->end_io_data; |
| 1470 | |
| 1471 | blk_mq_free_request(req); |
| 1472 | complete(&nvmeq->dev->ioq_wait); |
| 1473 | } |
| 1474 | |
| 1475 | static void nvme_del_cq_end(struct request *req, int error) |
| 1476 | { |
| 1477 | struct nvme_queue *nvmeq = req->end_io_data; |
| 1478 | |
| 1479 | if (!error) { |
| 1480 | unsigned long flags; |
| 1481 | |
Ming Lin | 2e39e0f | 2016-04-05 10:32:04 -0700 | [diff] [blame] | 1482 | /* |
| 1483 | * We might be called with the AQ q_lock held |
| 1484 | * and the I/O queue q_lock should always |
| 1485 | * nest inside the AQ one. |
| 1486 | */ |
| 1487 | spin_lock_irqsave_nested(&nvmeq->q_lock, flags, |
| 1488 | SINGLE_DEPTH_NESTING); |
Keith Busch | db3cbff | 2016-01-12 14:41:17 -0700 | [diff] [blame] | 1489 | nvme_process_cq(nvmeq); |
| 1490 | spin_unlock_irqrestore(&nvmeq->q_lock, flags); |
| 1491 | } |
| 1492 | |
| 1493 | nvme_del_queue_end(req, error); |
| 1494 | } |
| 1495 | |
| 1496 | static int nvme_delete_queue(struct nvme_queue *nvmeq, u8 opcode) |
| 1497 | { |
| 1498 | struct request_queue *q = nvmeq->dev->ctrl.admin_q; |
| 1499 | struct request *req; |
| 1500 | struct nvme_command cmd; |
| 1501 | |
| 1502 | memset(&cmd, 0, sizeof(cmd)); |
| 1503 | cmd.delete_queue.opcode = opcode; |
| 1504 | cmd.delete_queue.qid = cpu_to_le16(nvmeq->qid); |
| 1505 | |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 1506 | req = nvme_alloc_request(q, &cmd, BLK_MQ_REQ_NOWAIT, NVME_QID_ANY); |
Keith Busch | db3cbff | 2016-01-12 14:41:17 -0700 | [diff] [blame] | 1507 | if (IS_ERR(req)) |
| 1508 | return PTR_ERR(req); |
| 1509 | |
| 1510 | req->timeout = ADMIN_TIMEOUT; |
| 1511 | req->end_io_data = nvmeq; |
| 1512 | |
| 1513 | blk_execute_rq_nowait(q, NULL, req, false, |
| 1514 | opcode == nvme_admin_delete_cq ? |
| 1515 | nvme_del_cq_end : nvme_del_queue_end); |
| 1516 | return 0; |
| 1517 | } |
| 1518 | |
Keith Busch | 7065906 | 2016-10-12 09:22:16 -0600 | [diff] [blame] | 1519 | static void nvme_disable_io_queues(struct nvme_dev *dev, int queues) |
Keith Busch | db3cbff | 2016-01-12 14:41:17 -0700 | [diff] [blame] | 1520 | { |
Keith Busch | 7065906 | 2016-10-12 09:22:16 -0600 | [diff] [blame] | 1521 | int pass; |
Keith Busch | db3cbff | 2016-01-12 14:41:17 -0700 | [diff] [blame] | 1522 | unsigned long timeout; |
| 1523 | u8 opcode = nvme_admin_delete_sq; |
| 1524 | |
| 1525 | for (pass = 0; pass < 2; pass++) { |
Keith Busch | 014a0d6 | 2016-05-06 11:50:52 -0600 | [diff] [blame] | 1526 | int sent = 0, i = queues; |
Keith Busch | db3cbff | 2016-01-12 14:41:17 -0700 | [diff] [blame] | 1527 | |
| 1528 | reinit_completion(&dev->ioq_wait); |
| 1529 | retry: |
| 1530 | timeout = ADMIN_TIMEOUT; |
Gabriel Krisman Bertazi | c21377f | 2016-08-11 09:35:57 -0600 | [diff] [blame] | 1531 | for (; i > 0; i--, sent++) |
| 1532 | if (nvme_delete_queue(dev->queues[i], opcode)) |
Keith Busch | db3cbff | 2016-01-12 14:41:17 -0700 | [diff] [blame] | 1533 | break; |
Gabriel Krisman Bertazi | c21377f | 2016-08-11 09:35:57 -0600 | [diff] [blame] | 1534 | |
Keith Busch | db3cbff | 2016-01-12 14:41:17 -0700 | [diff] [blame] | 1535 | while (sent--) { |
| 1536 | timeout = wait_for_completion_io_timeout(&dev->ioq_wait, timeout); |
| 1537 | if (timeout == 0) |
| 1538 | return; |
| 1539 | if (i) |
| 1540 | goto retry; |
| 1541 | } |
| 1542 | opcode = nvme_admin_delete_cq; |
| 1543 | } |
| 1544 | } |
| 1545 | |
Matthew Wilcox | 422ef0c | 2013-04-16 11:22:36 -0400 | [diff] [blame] | 1546 | /* |
| 1547 | * Return: error value if an error occurred setting up the queues or calling |
| 1548 | * Identify Device. 0 if these succeeded, even if adding some of the |
| 1549 | * namespaces failed. At the moment, these failures are silent. TBD which |
| 1550 | * failures should be reported. |
| 1551 | */ |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 1552 | static int nvme_dev_add(struct nvme_dev *dev) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1553 | { |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1554 | if (!dev->ctrl.tagset) { |
Keith Busch | ffe7704 | 2015-06-08 10:08:15 -0600 | [diff] [blame] | 1555 | dev->tagset.ops = &nvme_mq_ops; |
| 1556 | dev->tagset.nr_hw_queues = dev->online_queues - 1; |
| 1557 | dev->tagset.timeout = NVME_IO_TIMEOUT; |
| 1558 | dev->tagset.numa_node = dev_to_node(dev->dev); |
| 1559 | dev->tagset.queue_depth = |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1560 | min_t(int, dev->q_depth, BLK_MQ_MAX_DEPTH) - 1; |
Keith Busch | ffe7704 | 2015-06-08 10:08:15 -0600 | [diff] [blame] | 1561 | dev->tagset.cmd_size = nvme_cmd_size(dev); |
| 1562 | dev->tagset.flags = BLK_MQ_F_SHOULD_MERGE; |
| 1563 | dev->tagset.driver_data = dev; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1564 | |
Keith Busch | ffe7704 | 2015-06-08 10:08:15 -0600 | [diff] [blame] | 1565 | if (blk_mq_alloc_tag_set(&dev->tagset)) |
| 1566 | return 0; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1567 | dev->ctrl.tagset = &dev->tagset; |
Keith Busch | 949928c | 2015-12-17 17:08:15 -0700 | [diff] [blame] | 1568 | } else { |
| 1569 | blk_mq_update_nr_hw_queues(&dev->tagset, dev->online_queues - 1); |
| 1570 | |
| 1571 | /* Free previously allocated queues that are no longer usable */ |
| 1572 | nvme_free_queues(dev, dev->online_queues); |
Keith Busch | ffe7704 | 2015-06-08 10:08:15 -0600 | [diff] [blame] | 1573 | } |
Keith Busch | 949928c | 2015-12-17 17:08:15 -0700 | [diff] [blame] | 1574 | |
Keith Busch | e1e5e56 | 2015-02-19 13:39:03 -0700 | [diff] [blame] | 1575 | return 0; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1576 | } |
| 1577 | |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 1578 | static int nvme_pci_enable(struct nvme_dev *dev) |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 1579 | { |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 1580 | u64 cap; |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 1581 | int result = -ENOMEM; |
Christoph Hellwig | e75ec75 | 2015-05-22 11:12:39 +0200 | [diff] [blame] | 1582 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 1583 | |
| 1584 | if (pci_enable_device_mem(pdev)) |
| 1585 | return result; |
| 1586 | |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 1587 | pci_set_master(pdev); |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 1588 | |
Christoph Hellwig | e75ec75 | 2015-05-22 11:12:39 +0200 | [diff] [blame] | 1589 | if (dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(64)) && |
| 1590 | dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(32))) |
Russell King | 052d0ef | 2013-06-26 23:49:11 +0100 | [diff] [blame] | 1591 | goto disable; |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 1592 | |
Christoph Hellwig | 7a67cbe | 2015-11-20 08:58:10 +0100 | [diff] [blame] | 1593 | if (readl(dev->bar + NVME_REG_CSTS) == -1) { |
Keith Busch | 0e53d18 | 2013-12-10 13:10:39 -0700 | [diff] [blame] | 1594 | result = -ENODEV; |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 1595 | goto disable; |
Keith Busch | 0e53d18 | 2013-12-10 13:10:39 -0700 | [diff] [blame] | 1596 | } |
Jens Axboe | e32efbf | 2014-11-14 09:49:26 -0700 | [diff] [blame] | 1597 | |
| 1598 | /* |
Keith Busch | a522905 | 2016-04-08 16:09:10 -0600 | [diff] [blame] | 1599 | * Some devices and/or platforms don't advertise or work with INTx |
| 1600 | * interrupts. Pre-enable a single MSIX or MSI vec for setup. We'll |
| 1601 | * adjust this later. |
Jens Axboe | e32efbf | 2014-11-14 09:49:26 -0700 | [diff] [blame] | 1602 | */ |
Christoph Hellwig | dca51e7 | 2016-09-14 16:18:57 +0200 | [diff] [blame] | 1603 | result = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES); |
| 1604 | if (result < 0) |
| 1605 | return result; |
Jens Axboe | e32efbf | 2014-11-14 09:49:26 -0700 | [diff] [blame] | 1606 | |
Christoph Hellwig | 7a67cbe | 2015-11-20 08:58:10 +0100 | [diff] [blame] | 1607 | cap = lo_hi_readq(dev->bar + NVME_REG_CAP); |
| 1608 | |
Keith Busch | 42f6142 | 2014-03-24 10:46:25 -0600 | [diff] [blame] | 1609 | dev->q_depth = min_t(int, NVME_CAP_MQES(cap) + 1, NVME_Q_DEPTH); |
| 1610 | dev->db_stride = 1 << NVME_CAP_STRIDE(cap); |
Christoph Hellwig | 7a67cbe | 2015-11-20 08:58:10 +0100 | [diff] [blame] | 1611 | dev->dbs = dev->bar + 4096; |
Stephan Günther | 1f390c1 | 2015-12-01 13:23:22 -0700 | [diff] [blame] | 1612 | |
| 1613 | /* |
| 1614 | * Temporary fix for the Apple controller found in the MacBook8,1 and |
| 1615 | * some MacBook7,1 to avoid controller resets and data loss. |
| 1616 | */ |
| 1617 | if (pdev->vendor == PCI_VENDOR_ID_APPLE && pdev->device == 0x2001) { |
| 1618 | dev->q_depth = 2; |
| 1619 | dev_warn(dev->dev, "detected Apple NVMe controller, set " |
| 1620 | "queue depth=%u to work around controller resets\n", |
| 1621 | dev->q_depth); |
| 1622 | } |
| 1623 | |
Stephen Bates | 202021c | 2016-10-05 20:01:12 -0600 | [diff] [blame] | 1624 | /* |
| 1625 | * CMBs can currently only exist on >=1.2 PCIe devices. We only |
| 1626 | * populate sysfs if a CMB is implemented. Note that we add the |
| 1627 | * CMB attribute to the nvme_ctrl kobj which removes the need to remove |
| 1628 | * it on exit. Since nvme_dev_attrs_group has no name we can pass |
| 1629 | * NULL as final argument to sysfs_add_file_to_group. |
| 1630 | */ |
| 1631 | |
Gabriel Krisman Bertazi | 8ef2074 | 2016-10-19 09:51:05 -0600 | [diff] [blame] | 1632 | if (readl(dev->bar + NVME_REG_VS) >= NVME_VS(1, 2, 0)) { |
Jon Derrick | 8ffaadf | 2015-07-20 10:14:09 -0600 | [diff] [blame] | 1633 | dev->cmb = nvme_map_cmb(dev); |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 1634 | |
Stephen Bates | 202021c | 2016-10-05 20:01:12 -0600 | [diff] [blame] | 1635 | if (dev->cmbsz) { |
| 1636 | if (sysfs_add_file_to_group(&dev->ctrl.device->kobj, |
| 1637 | &dev_attr_cmb.attr, NULL)) |
| 1638 | dev_warn(dev->dev, |
| 1639 | "failed to add sysfs attribute for CMB\n"); |
| 1640 | } |
| 1641 | } |
| 1642 | |
Keith Busch | a0a3408 | 2015-12-07 15:30:31 -0700 | [diff] [blame] | 1643 | pci_enable_pcie_error_reporting(pdev); |
| 1644 | pci_save_state(pdev); |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 1645 | return 0; |
| 1646 | |
| 1647 | disable: |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 1648 | pci_disable_device(pdev); |
| 1649 | return result; |
| 1650 | } |
| 1651 | |
| 1652 | static void nvme_dev_unmap(struct nvme_dev *dev) |
| 1653 | { |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 1654 | if (dev->bar) |
| 1655 | iounmap(dev->bar); |
Johannes Thumshirn | a1f447b | 2016-06-07 09:44:02 +0200 | [diff] [blame] | 1656 | pci_release_mem_regions(to_pci_dev(dev->dev)); |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 1657 | } |
| 1658 | |
| 1659 | static void nvme_pci_disable(struct nvme_dev *dev) |
| 1660 | { |
Christoph Hellwig | e75ec75 | 2015-05-22 11:12:39 +0200 | [diff] [blame] | 1661 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
| 1662 | |
Jon Derrick | 6d6a43a | 2017-05-05 14:52:06 -0600 | [diff] [blame] | 1663 | nvme_release_cmb(dev); |
Christoph Hellwig | dca51e7 | 2016-09-14 16:18:57 +0200 | [diff] [blame] | 1664 | pci_free_irq_vectors(pdev); |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 1665 | |
Keith Busch | a0a3408 | 2015-12-07 15:30:31 -0700 | [diff] [blame] | 1666 | if (pci_is_enabled(pdev)) { |
| 1667 | pci_disable_pcie_error_reporting(pdev); |
Christoph Hellwig | e75ec75 | 2015-05-22 11:12:39 +0200 | [diff] [blame] | 1668 | pci_disable_device(pdev); |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 1669 | } |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 1670 | } |
| 1671 | |
Keith Busch | a5cdb68 | 2016-01-12 14:41:18 -0700 | [diff] [blame] | 1672 | static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1673 | { |
Keith Busch | 7065906 | 2016-10-12 09:22:16 -0600 | [diff] [blame] | 1674 | int i, queues; |
Keith Busch | 7c1b245 | 2014-06-25 11:18:12 -0600 | [diff] [blame] | 1675 | u32 csts = -1; |
Keith Busch | 2240427 | 2013-07-15 15:02:20 -0600 | [diff] [blame] | 1676 | |
Christoph Hellwig | 2d55cd5 | 2016-02-29 15:59:46 +0100 | [diff] [blame] | 1677 | del_timer_sync(&dev->watchdog_timer); |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 1678 | |
Keith Busch | 77bf25e | 2015-11-26 12:21:29 +0100 | [diff] [blame] | 1679 | mutex_lock(&dev->shutdown_lock); |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 1680 | if (pci_is_enabled(to_pci_dev(dev->dev))) { |
Keith Busch | 2564626 | 2016-01-04 09:10:57 -0700 | [diff] [blame] | 1681 | nvme_stop_queues(&dev->ctrl); |
Christoph Hellwig | 7a67cbe | 2015-11-20 08:58:10 +0100 | [diff] [blame] | 1682 | csts = readl(dev->bar + NVME_REG_CSTS); |
Keith Busch | c9d3bf8 | 2015-01-07 18:55:52 -0700 | [diff] [blame] | 1683 | } |
Gabriel Krisman Bertazi | c21377f | 2016-08-11 09:35:57 -0600 | [diff] [blame] | 1684 | |
Keith Busch | 7065906 | 2016-10-12 09:22:16 -0600 | [diff] [blame] | 1685 | queues = dev->online_queues - 1; |
Gabriel Krisman Bertazi | c21377f | 2016-08-11 09:35:57 -0600 | [diff] [blame] | 1686 | for (i = dev->queue_count - 1; i > 0; i--) |
| 1687 | nvme_suspend_queue(dev->queues[i]); |
| 1688 | |
Keith Busch | 7c1b245 | 2014-06-25 11:18:12 -0600 | [diff] [blame] | 1689 | if (csts & NVME_CSTS_CFS || !(csts & NVME_CSTS_RDY)) { |
Gabriel Krisman Bertazi | 82469c5 | 2016-09-06 17:39:13 -0300 | [diff] [blame] | 1690 | /* A device might become IO incapable very soon during |
| 1691 | * probe, before the admin queue is configured. Thus, |
| 1692 | * queue_count can be 0 here. |
| 1693 | */ |
| 1694 | if (dev->queue_count) |
| 1695 | nvme_suspend_queue(dev->queues[0]); |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 1696 | } else { |
Keith Busch | 7065906 | 2016-10-12 09:22:16 -0600 | [diff] [blame] | 1697 | nvme_disable_io_queues(dev, queues); |
Keith Busch | a5cdb68 | 2016-01-12 14:41:18 -0700 | [diff] [blame] | 1698 | nvme_disable_admin_queue(dev, shutdown); |
Keith Busch | 4d11542 | 2013-12-10 13:10:40 -0700 | [diff] [blame] | 1699 | } |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 1700 | nvme_pci_disable(dev); |
Keith Busch | 07836e6 | 2015-02-19 10:34:48 -0700 | [diff] [blame] | 1701 | |
Ming Lin | e1958e6 | 2016-05-18 14:05:01 -0700 | [diff] [blame] | 1702 | blk_mq_tagset_busy_iter(&dev->tagset, nvme_cancel_request, &dev->ctrl); |
| 1703 | blk_mq_tagset_busy_iter(&dev->admin_tagset, nvme_cancel_request, &dev->ctrl); |
Keith Busch | 77bf25e | 2015-11-26 12:21:29 +0100 | [diff] [blame] | 1704 | mutex_unlock(&dev->shutdown_lock); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1705 | } |
| 1706 | |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 1707 | static int nvme_setup_prp_pools(struct nvme_dev *dev) |
| 1708 | { |
Christoph Hellwig | e75ec75 | 2015-05-22 11:12:39 +0200 | [diff] [blame] | 1709 | dev->prp_page_pool = dma_pool_create("prp list page", dev->dev, |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 1710 | PAGE_SIZE, PAGE_SIZE, 0); |
| 1711 | if (!dev->prp_page_pool) |
| 1712 | return -ENOMEM; |
| 1713 | |
Matthew Wilcox | 99802a7 | 2011-02-10 10:30:34 -0500 | [diff] [blame] | 1714 | /* Optimisation for I/Os between 4k and 128k */ |
Christoph Hellwig | e75ec75 | 2015-05-22 11:12:39 +0200 | [diff] [blame] | 1715 | dev->prp_small_pool = dma_pool_create("prp list 256", dev->dev, |
Matthew Wilcox | 99802a7 | 2011-02-10 10:30:34 -0500 | [diff] [blame] | 1716 | 256, 256, 0); |
| 1717 | if (!dev->prp_small_pool) { |
| 1718 | dma_pool_destroy(dev->prp_page_pool); |
| 1719 | return -ENOMEM; |
| 1720 | } |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 1721 | return 0; |
| 1722 | } |
| 1723 | |
| 1724 | static void nvme_release_prp_pools(struct nvme_dev *dev) |
| 1725 | { |
| 1726 | dma_pool_destroy(dev->prp_page_pool); |
Matthew Wilcox | 99802a7 | 2011-02-10 10:30:34 -0500 | [diff] [blame] | 1727 | dma_pool_destroy(dev->prp_small_pool); |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 1728 | } |
| 1729 | |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1730 | static void nvme_pci_free_ctrl(struct nvme_ctrl *ctrl) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1731 | { |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1732 | struct nvme_dev *dev = to_nvme_dev(ctrl); |
Keith Busch | 9ac2709 | 2014-01-31 16:53:39 -0700 | [diff] [blame] | 1733 | |
Christoph Hellwig | e75ec75 | 2015-05-22 11:12:39 +0200 | [diff] [blame] | 1734 | put_device(dev->dev); |
Keith Busch | 4af0e21 | 2015-06-08 10:08:13 -0600 | [diff] [blame] | 1735 | if (dev->tagset.tags) |
| 1736 | blk_mq_free_tag_set(&dev->tagset); |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 1737 | if (dev->ctrl.admin_q) |
| 1738 | blk_put_queue(dev->ctrl.admin_q); |
Keith Busch | 5e82e95 | 2013-02-19 10:17:58 -0700 | [diff] [blame] | 1739 | kfree(dev->queues); |
Keith Busch | 5e82e95 | 2013-02-19 10:17:58 -0700 | [diff] [blame] | 1740 | kfree(dev); |
| 1741 | } |
| 1742 | |
Keith Busch | f58944e | 2016-02-24 09:15:55 -0700 | [diff] [blame] | 1743 | static void nvme_remove_dead_ctrl(struct nvme_dev *dev, int status) |
| 1744 | { |
Linus Torvalds | 237045f | 2016-03-18 17:13:31 -0700 | [diff] [blame] | 1745 | dev_warn(dev->ctrl.device, "Removing after probe failure status: %d\n", status); |
Keith Busch | f58944e | 2016-02-24 09:15:55 -0700 | [diff] [blame] | 1746 | |
| 1747 | kref_get(&dev->ctrl.kref); |
Keith Busch | 69d9a99 | 2016-02-24 09:15:56 -0700 | [diff] [blame] | 1748 | nvme_dev_disable(dev, false); |
Keith Busch | f58944e | 2016-02-24 09:15:55 -0700 | [diff] [blame] | 1749 | if (!schedule_work(&dev->remove_work)) |
| 1750 | nvme_put_ctrl(&dev->ctrl); |
| 1751 | } |
| 1752 | |
Christoph Hellwig | fd634f41 | 2015-11-26 12:42:26 +0100 | [diff] [blame] | 1753 | static void nvme_reset_work(struct work_struct *work) |
Keith Busch | 5e82e95 | 2013-02-19 10:17:58 -0700 | [diff] [blame] | 1754 | { |
Christoph Hellwig | fd634f41 | 2015-11-26 12:42:26 +0100 | [diff] [blame] | 1755 | struct nvme_dev *dev = container_of(work, struct nvme_dev, reset_work); |
Keith Busch | f58944e | 2016-02-24 09:15:55 -0700 | [diff] [blame] | 1756 | int result = -ENODEV; |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 1757 | |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 1758 | if (WARN_ON(dev->ctrl.state == NVME_CTRL_RESETTING)) |
Christoph Hellwig | fd634f41 | 2015-11-26 12:42:26 +0100 | [diff] [blame] | 1759 | goto out; |
| 1760 | |
| 1761 | /* |
| 1762 | * If we're called to reset a live controller first shut it down before |
| 1763 | * moving on. |
| 1764 | */ |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 1765 | if (dev->ctrl.ctrl_config & NVME_CC_ENABLE) |
Keith Busch | a5cdb68 | 2016-01-12 14:41:18 -0700 | [diff] [blame] | 1766 | nvme_dev_disable(dev, false); |
Christoph Hellwig | fd634f41 | 2015-11-26 12:42:26 +0100 | [diff] [blame] | 1767 | |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 1768 | if (!nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_RESETTING)) |
Keith Busch | 9bf2b97 | 2016-04-08 16:11:02 -0600 | [diff] [blame] | 1769 | goto out; |
| 1770 | |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 1771 | result = nvme_pci_enable(dev); |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 1772 | if (result) |
Christoph Hellwig | 3cf519b | 2015-10-03 09:49:23 +0200 | [diff] [blame] | 1773 | goto out; |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 1774 | |
| 1775 | result = nvme_configure_admin_queue(dev); |
| 1776 | if (result) |
Keith Busch | f58944e | 2016-02-24 09:15:55 -0700 | [diff] [blame] | 1777 | goto out; |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 1778 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1779 | nvme_init_queue(dev->queues[0], 0); |
Keith Busch | 0fb59cb | 2015-01-07 18:55:50 -0700 | [diff] [blame] | 1780 | result = nvme_alloc_admin_tags(dev); |
| 1781 | if (result) |
Keith Busch | f58944e | 2016-02-24 09:15:55 -0700 | [diff] [blame] | 1782 | goto out; |
Dan McLeran | b9afca3 | 2014-04-07 17:10:11 -0600 | [diff] [blame] | 1783 | |
Christoph Hellwig | ce4541f | 2015-10-16 07:58:46 +0200 | [diff] [blame] | 1784 | result = nvme_init_identify(&dev->ctrl); |
| 1785 | if (result) |
Keith Busch | f58944e | 2016-02-24 09:15:55 -0700 | [diff] [blame] | 1786 | goto out; |
Christoph Hellwig | ce4541f | 2015-10-16 07:58:46 +0200 | [diff] [blame] | 1787 | |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 1788 | result = nvme_setup_io_queues(dev); |
Keith Busch | badc34d | 2014-06-23 14:25:35 -0600 | [diff] [blame] | 1789 | if (result) |
Keith Busch | f58944e | 2016-02-24 09:15:55 -0700 | [diff] [blame] | 1790 | goto out; |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 1791 | |
Keith Busch | 21f033f | 2016-04-12 11:13:11 -0600 | [diff] [blame] | 1792 | /* |
| 1793 | * A controller that can not execute IO typically requires user |
| 1794 | * intervention to correct. For such degraded controllers, the driver |
| 1795 | * should not submit commands the user did not request, so skip |
| 1796 | * registering for asynchronous event notification on this condition. |
| 1797 | */ |
Christoph Hellwig | f866fc4 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 1798 | if (dev->online_queues > 1) |
| 1799 | nvme_queue_async_events(&dev->ctrl); |
Christoph Hellwig | 3cf519b | 2015-10-03 09:49:23 +0200 | [diff] [blame] | 1800 | |
Christoph Hellwig | 2d55cd5 | 2016-02-29 15:59:46 +0100 | [diff] [blame] | 1801 | mod_timer(&dev->watchdog_timer, round_jiffies(jiffies + HZ)); |
Christoph Hellwig | 3cf519b | 2015-10-03 09:49:23 +0200 | [diff] [blame] | 1802 | |
Christoph Hellwig | 2659e57 | 2015-10-02 18:51:31 +0200 | [diff] [blame] | 1803 | /* |
| 1804 | * Keep the controller around but remove all namespaces if we don't have |
| 1805 | * any working I/O queue. |
| 1806 | */ |
Christoph Hellwig | 3cf519b | 2015-10-03 09:49:23 +0200 | [diff] [blame] | 1807 | if (dev->online_queues < 2) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 1808 | dev_warn(dev->ctrl.device, "IO queues not created\n"); |
Keith Busch | 3b24774 | 2016-04-27 15:51:18 -0600 | [diff] [blame] | 1809 | nvme_kill_queues(&dev->ctrl); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1810 | nvme_remove_namespaces(&dev->ctrl); |
Christoph Hellwig | 3cf519b | 2015-10-03 09:49:23 +0200 | [diff] [blame] | 1811 | } else { |
Keith Busch | 2564626 | 2016-01-04 09:10:57 -0700 | [diff] [blame] | 1812 | nvme_start_queues(&dev->ctrl); |
Christoph Hellwig | 3cf519b | 2015-10-03 09:49:23 +0200 | [diff] [blame] | 1813 | nvme_dev_add(dev); |
| 1814 | } |
| 1815 | |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 1816 | if (!nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_LIVE)) { |
| 1817 | dev_warn(dev->ctrl.device, "failed to mark controller live\n"); |
| 1818 | goto out; |
| 1819 | } |
Christoph Hellwig | 92911a5 | 2016-04-26 13:51:58 +0200 | [diff] [blame] | 1820 | |
| 1821 | if (dev->online_queues > 1) |
Christoph Hellwig | 5955be2 | 2016-04-26 13:51:59 +0200 | [diff] [blame] | 1822 | nvme_queue_scan(&dev->ctrl); |
Christoph Hellwig | 3cf519b | 2015-10-03 09:49:23 +0200 | [diff] [blame] | 1823 | return; |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 1824 | |
Christoph Hellwig | 3cf519b | 2015-10-03 09:49:23 +0200 | [diff] [blame] | 1825 | out: |
Keith Busch | f58944e | 2016-02-24 09:15:55 -0700 | [diff] [blame] | 1826 | nvme_remove_dead_ctrl(dev, result); |
Keith Busch | f0b5073 | 2013-07-15 15:02:21 -0600 | [diff] [blame] | 1827 | } |
| 1828 | |
Christoph Hellwig | 5c8809e | 2015-11-26 12:35:49 +0100 | [diff] [blame] | 1829 | static void nvme_remove_dead_ctrl_work(struct work_struct *work) |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 1830 | { |
Christoph Hellwig | 5c8809e | 2015-11-26 12:35:49 +0100 | [diff] [blame] | 1831 | struct nvme_dev *dev = container_of(work, struct nvme_dev, remove_work); |
Christoph Hellwig | e75ec75 | 2015-05-22 11:12:39 +0200 | [diff] [blame] | 1832 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 1833 | |
Keith Busch | 69d9a99 | 2016-02-24 09:15:56 -0700 | [diff] [blame] | 1834 | nvme_kill_queues(&dev->ctrl); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 1835 | if (pci_get_drvdata(pdev)) |
Keith Busch | 921920a | 2016-03-28 16:03:21 -0600 | [diff] [blame] | 1836 | device_release_driver(&pdev->dev); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1837 | nvme_put_ctrl(&dev->ctrl); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 1838 | } |
| 1839 | |
Keith Busch | 4cc0652 | 2015-06-05 10:30:08 -0600 | [diff] [blame] | 1840 | static int nvme_reset(struct nvme_dev *dev) |
| 1841 | { |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 1842 | if (!dev->ctrl.admin_q || blk_queue_dying(dev->ctrl.admin_q)) |
Keith Busch | 4cc0652 | 2015-06-05 10:30:08 -0600 | [diff] [blame] | 1843 | return -ENODEV; |
Keith Busch | c5f6ce9 | 2016-10-05 16:32:45 -0400 | [diff] [blame] | 1844 | if (work_busy(&dev->reset_work)) |
| 1845 | return -ENODEV; |
Christoph Hellwig | 846cc05 | 2015-11-26 12:10:29 +0100 | [diff] [blame] | 1846 | if (!queue_work(nvme_workq, &dev->reset_work)) |
| 1847 | return -EBUSY; |
Christoph Hellwig | 846cc05 | 2015-11-26 12:10:29 +0100 | [diff] [blame] | 1848 | return 0; |
Keith Busch | 4cc0652 | 2015-06-05 10:30:08 -0600 | [diff] [blame] | 1849 | } |
| 1850 | |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 1851 | static int nvme_pci_reg_read32(struct nvme_ctrl *ctrl, u32 off, u32 *val) |
Keith Busch | 4cc0652 | 2015-06-05 10:30:08 -0600 | [diff] [blame] | 1852 | { |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 1853 | *val = readl(to_nvme_dev(ctrl)->bar + off); |
| 1854 | return 0; |
Keith Busch | 4cc0652 | 2015-06-05 10:30:08 -0600 | [diff] [blame] | 1855 | } |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 1856 | |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1857 | static int nvme_pci_reg_write32(struct nvme_ctrl *ctrl, u32 off, u32 val) |
| 1858 | { |
| 1859 | writel(val, to_nvme_dev(ctrl)->bar + off); |
| 1860 | return 0; |
| 1861 | } |
| 1862 | |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1863 | static int nvme_pci_reg_read64(struct nvme_ctrl *ctrl, u32 off, u64 *val) |
| 1864 | { |
| 1865 | *val = readq(to_nvme_dev(ctrl)->bar + off); |
| 1866 | return 0; |
| 1867 | } |
| 1868 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1869 | static int nvme_pci_reset_ctrl(struct nvme_ctrl *ctrl) |
| 1870 | { |
Keith Busch | c5f6ce9 | 2016-10-05 16:32:45 -0400 | [diff] [blame] | 1871 | struct nvme_dev *dev = to_nvme_dev(ctrl); |
| 1872 | int ret = nvme_reset(dev); |
| 1873 | |
| 1874 | if (!ret) |
| 1875 | flush_work(&dev->reset_work); |
| 1876 | return ret; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1877 | } |
| 1878 | |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 1879 | static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = { |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 1880 | .name = "pcie", |
Sagi Grimberg | e439bb1 | 2016-02-10 10:03:29 -0800 | [diff] [blame] | 1881 | .module = THIS_MODULE, |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 1882 | .reg_read32 = nvme_pci_reg_read32, |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1883 | .reg_write32 = nvme_pci_reg_write32, |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1884 | .reg_read64 = nvme_pci_reg_read64, |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1885 | .reset_ctrl = nvme_pci_reset_ctrl, |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1886 | .free_ctrl = nvme_pci_free_ctrl, |
Christoph Hellwig | f866fc4 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 1887 | .submit_async_event = nvme_pci_submit_async_event, |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 1888 | }; |
Keith Busch | 4cc0652 | 2015-06-05 10:30:08 -0600 | [diff] [blame] | 1889 | |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 1890 | static int nvme_dev_map(struct nvme_dev *dev) |
| 1891 | { |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 1892 | struct pci_dev *pdev = to_pci_dev(dev->dev); |
| 1893 | |
Johannes Thumshirn | a1f447b | 2016-06-07 09:44:02 +0200 | [diff] [blame] | 1894 | if (pci_request_mem_regions(pdev, "nvme")) |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 1895 | return -ENODEV; |
| 1896 | |
| 1897 | dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); |
| 1898 | if (!dev->bar) |
| 1899 | goto release; |
| 1900 | |
| 1901 | return 0; |
| 1902 | release: |
Johannes Thumshirn | a1f447b | 2016-06-07 09:44:02 +0200 | [diff] [blame] | 1903 | pci_release_mem_regions(pdev); |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 1904 | return -ENODEV; |
| 1905 | } |
| 1906 | |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 1907 | 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] | 1908 | { |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1909 | int node, result = -ENOMEM; |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1910 | struct nvme_dev *dev; |
| 1911 | |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1912 | node = dev_to_node(&pdev->dev); |
| 1913 | if (node == NUMA_NO_NODE) |
Masayoshi Mizuma | 2fa8435 | 2016-06-20 09:33:17 +0900 | [diff] [blame] | 1914 | set_dev_node(&pdev->dev, first_memory_node); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1915 | |
| 1916 | dev = kzalloc_node(sizeof(*dev), GFP_KERNEL, node); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1917 | if (!dev) |
| 1918 | return -ENOMEM; |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 1919 | dev->queues = kzalloc_node((num_possible_cpus() + 1) * sizeof(void *), |
| 1920 | GFP_KERNEL, node); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1921 | if (!dev->queues) |
| 1922 | goto free; |
| 1923 | |
Christoph Hellwig | e75ec75 | 2015-05-22 11:12:39 +0200 | [diff] [blame] | 1924 | dev->dev = get_device(&pdev->dev); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 1925 | pci_set_drvdata(pdev, dev); |
Keith Busch | b3fffde | 2015-02-03 11:21:42 -0700 | [diff] [blame] | 1926 | |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 1927 | result = nvme_dev_map(dev); |
| 1928 | if (result) |
| 1929 | goto free; |
| 1930 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1931 | INIT_WORK(&dev->reset_work, nvme_reset_work); |
Christoph Hellwig | 5c8809e | 2015-11-26 12:35:49 +0100 | [diff] [blame] | 1932 | INIT_WORK(&dev->remove_work, nvme_remove_dead_ctrl_work); |
Christoph Hellwig | 2d55cd5 | 2016-02-29 15:59:46 +0100 | [diff] [blame] | 1933 | setup_timer(&dev->watchdog_timer, nvme_watchdog_timer, |
| 1934 | (unsigned long)dev); |
Keith Busch | 77bf25e | 2015-11-26 12:21:29 +0100 | [diff] [blame] | 1935 | mutex_init(&dev->shutdown_lock); |
Keith Busch | db3cbff | 2016-01-12 14:41:17 -0700 | [diff] [blame] | 1936 | init_completion(&dev->ioq_wait); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1937 | |
| 1938 | result = nvme_setup_prp_pools(dev); |
| 1939 | if (result) |
| 1940 | goto put_pci; |
| 1941 | |
| 1942 | result = nvme_init_ctrl(&dev->ctrl, &pdev->dev, &nvme_pci_ctrl_ops, |
| 1943 | id->driver_data); |
| 1944 | if (result) |
| 1945 | goto release_pools; |
| 1946 | |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 1947 | dev_info(dev->ctrl.device, "pci function %s\n", dev_name(&pdev->dev)); |
| 1948 | |
Keith Busch | 92f7a16 | 2015-10-23 11:42:02 -0600 | [diff] [blame] | 1949 | queue_work(nvme_workq, &dev->reset_work); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1950 | return 0; |
| 1951 | |
Keith Busch | 0877cb0 | 2013-07-15 15:02:19 -0600 | [diff] [blame] | 1952 | release_pools: |
Matthew Wilcox | 091b609 | 2011-02-10 09:56:01 -0500 | [diff] [blame] | 1953 | nvme_release_prp_pools(dev); |
Keith Busch | a96d4f5 | 2014-08-19 19:15:59 -0600 | [diff] [blame] | 1954 | put_pci: |
Christoph Hellwig | e75ec75 | 2015-05-22 11:12:39 +0200 | [diff] [blame] | 1955 | put_device(dev->dev); |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 1956 | nvme_dev_unmap(dev); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1957 | free: |
| 1958 | kfree(dev->queues); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1959 | kfree(dev); |
| 1960 | return result; |
| 1961 | } |
| 1962 | |
Keith Busch | f0d54a5 | 2014-05-02 10:40:43 -0600 | [diff] [blame] | 1963 | static void nvme_reset_notify(struct pci_dev *pdev, bool prepare) |
| 1964 | { |
Keith Busch | a673947 | 2014-06-23 16:03:21 -0600 | [diff] [blame] | 1965 | struct nvme_dev *dev = pci_get_drvdata(pdev); |
Keith Busch | f0d54a5 | 2014-05-02 10:40:43 -0600 | [diff] [blame] | 1966 | |
Keith Busch | a673947 | 2014-06-23 16:03:21 -0600 | [diff] [blame] | 1967 | if (prepare) |
Keith Busch | a5cdb68 | 2016-01-12 14:41:18 -0700 | [diff] [blame] | 1968 | nvme_dev_disable(dev, false); |
Keith Busch | a673947 | 2014-06-23 16:03:21 -0600 | [diff] [blame] | 1969 | else |
Keith Busch | c5f6ce9 | 2016-10-05 16:32:45 -0400 | [diff] [blame] | 1970 | nvme_reset(dev); |
Keith Busch | f0d54a5 | 2014-05-02 10:40:43 -0600 | [diff] [blame] | 1971 | } |
| 1972 | |
Keith Busch | 09ece14 | 2014-01-27 11:29:40 -0500 | [diff] [blame] | 1973 | static void nvme_shutdown(struct pci_dev *pdev) |
| 1974 | { |
| 1975 | struct nvme_dev *dev = pci_get_drvdata(pdev); |
Keith Busch | a5cdb68 | 2016-01-12 14:41:18 -0700 | [diff] [blame] | 1976 | nvme_dev_disable(dev, true); |
Keith Busch | 09ece14 | 2014-01-27 11:29:40 -0500 | [diff] [blame] | 1977 | } |
| 1978 | |
Keith Busch | f58944e | 2016-02-24 09:15:55 -0700 | [diff] [blame] | 1979 | /* |
| 1980 | * The driver's remove may be called on a device in a partially initialized |
| 1981 | * state. This function must not have any dependencies on the device state in |
| 1982 | * order to proceed. |
| 1983 | */ |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 1984 | static void nvme_remove(struct pci_dev *pdev) |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 1985 | { |
| 1986 | struct nvme_dev *dev = pci_get_drvdata(pdev); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 1987 | |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 1988 | nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_DELETING); |
| 1989 | |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 1990 | pci_set_drvdata(pdev, NULL); |
Keith Busch | 0ff9d4e | 2016-05-12 08:37:14 -0600 | [diff] [blame] | 1991 | |
Keith Busch | 02b23e0 | 2017-02-10 18:15:49 -0500 | [diff] [blame] | 1992 | if (!pci_device_is_present(pdev)) { |
Keith Busch | 0ff9d4e | 2016-05-12 08:37:14 -0600 | [diff] [blame] | 1993 | nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_DEAD); |
Keith Busch | 02b23e0 | 2017-02-10 18:15:49 -0500 | [diff] [blame] | 1994 | nvme_dev_disable(dev, false); |
| 1995 | } |
Keith Busch | 0ff9d4e | 2016-05-12 08:37:14 -0600 | [diff] [blame] | 1996 | |
Keith Busch | 9bf2b97 | 2016-04-08 16:11:02 -0600 | [diff] [blame] | 1997 | flush_work(&dev->reset_work); |
Keith Busch | 53029b0 | 2015-11-28 15:41:02 +0100 | [diff] [blame] | 1998 | nvme_uninit_ctrl(&dev->ctrl); |
Keith Busch | a5cdb68 | 2016-01-12 14:41:18 -0700 | [diff] [blame] | 1999 | nvme_dev_disable(dev, true); |
Matias Bjørling | a4aea56 | 2014-11-04 08:20:14 -0700 | [diff] [blame] | 2000 | nvme_dev_remove_admin(dev); |
| 2001 | nvme_free_queues(dev, 0); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2002 | nvme_release_prp_pools(dev); |
Keith Busch | b00a726 | 2016-02-24 09:15:52 -0700 | [diff] [blame] | 2003 | nvme_dev_unmap(dev); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2004 | nvme_put_ctrl(&dev->ctrl); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2005 | } |
| 2006 | |
Keith Busch | 13880f5 | 2016-06-20 09:41:06 -0600 | [diff] [blame] | 2007 | static int nvme_pci_sriov_configure(struct pci_dev *pdev, int numvfs) |
| 2008 | { |
| 2009 | int ret = 0; |
| 2010 | |
| 2011 | if (numvfs == 0) { |
| 2012 | if (pci_vfs_assigned(pdev)) { |
| 2013 | dev_warn(&pdev->dev, |
| 2014 | "Cannot disable SR-IOV VFs while assigned\n"); |
| 2015 | return -EPERM; |
| 2016 | } |
| 2017 | pci_disable_sriov(pdev); |
| 2018 | return 0; |
| 2019 | } |
| 2020 | |
| 2021 | ret = pci_enable_sriov(pdev, numvfs); |
| 2022 | return ret ? ret : numvfs; |
| 2023 | } |
| 2024 | |
Jingoo Han | 671a601 | 2014-02-13 11:19:14 +0900 | [diff] [blame] | 2025 | #ifdef CONFIG_PM_SLEEP |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 2026 | static int nvme_suspend(struct device *dev) |
| 2027 | { |
| 2028 | struct pci_dev *pdev = to_pci_dev(dev); |
| 2029 | struct nvme_dev *ndev = pci_get_drvdata(pdev); |
| 2030 | |
Keith Busch | a5cdb68 | 2016-01-12 14:41:18 -0700 | [diff] [blame] | 2031 | nvme_dev_disable(ndev, true); |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 2032 | return 0; |
| 2033 | } |
| 2034 | |
| 2035 | static int nvme_resume(struct device *dev) |
| 2036 | { |
| 2037 | struct pci_dev *pdev = to_pci_dev(dev); |
| 2038 | struct nvme_dev *ndev = pci_get_drvdata(pdev); |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 2039 | |
Keith Busch | c5f6ce9 | 2016-10-05 16:32:45 -0400 | [diff] [blame] | 2040 | nvme_reset(ndev); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2041 | return 0; |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 2042 | } |
Jingoo Han | 671a601 | 2014-02-13 11:19:14 +0900 | [diff] [blame] | 2043 | #endif |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 2044 | |
| 2045 | 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] | 2046 | |
Keith Busch | a0a3408 | 2015-12-07 15:30:31 -0700 | [diff] [blame] | 2047 | static pci_ers_result_t nvme_error_detected(struct pci_dev *pdev, |
| 2048 | pci_channel_state_t state) |
| 2049 | { |
| 2050 | struct nvme_dev *dev = pci_get_drvdata(pdev); |
| 2051 | |
| 2052 | /* |
| 2053 | * A frozen channel requires a reset. When detected, this method will |
| 2054 | * shutdown the controller to quiesce. The controller will be restarted |
| 2055 | * after the slot reset through driver's slot_reset callback. |
| 2056 | */ |
Keith Busch | a0a3408 | 2015-12-07 15:30:31 -0700 | [diff] [blame] | 2057 | switch (state) { |
| 2058 | case pci_channel_io_normal: |
| 2059 | return PCI_ERS_RESULT_CAN_RECOVER; |
| 2060 | case pci_channel_io_frozen: |
Keith Busch | d011fb3 | 2016-04-04 15:07:41 -0600 | [diff] [blame] | 2061 | dev_warn(dev->ctrl.device, |
| 2062 | "frozen state error detected, reset controller\n"); |
Keith Busch | a5cdb68 | 2016-01-12 14:41:18 -0700 | [diff] [blame] | 2063 | nvme_dev_disable(dev, false); |
Keith Busch | a0a3408 | 2015-12-07 15:30:31 -0700 | [diff] [blame] | 2064 | return PCI_ERS_RESULT_NEED_RESET; |
| 2065 | case pci_channel_io_perm_failure: |
Keith Busch | d011fb3 | 2016-04-04 15:07:41 -0600 | [diff] [blame] | 2066 | dev_warn(dev->ctrl.device, |
| 2067 | "failure state error detected, request disconnect\n"); |
Keith Busch | a0a3408 | 2015-12-07 15:30:31 -0700 | [diff] [blame] | 2068 | return PCI_ERS_RESULT_DISCONNECT; |
| 2069 | } |
| 2070 | return PCI_ERS_RESULT_NEED_RESET; |
| 2071 | } |
| 2072 | |
| 2073 | static pci_ers_result_t nvme_slot_reset(struct pci_dev *pdev) |
| 2074 | { |
| 2075 | struct nvme_dev *dev = pci_get_drvdata(pdev); |
| 2076 | |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 2077 | dev_info(dev->ctrl.device, "restart after slot reset\n"); |
Keith Busch | a0a3408 | 2015-12-07 15:30:31 -0700 | [diff] [blame] | 2078 | pci_restore_state(pdev); |
Keith Busch | c5f6ce9 | 2016-10-05 16:32:45 -0400 | [diff] [blame] | 2079 | nvme_reset(dev); |
Keith Busch | a0a3408 | 2015-12-07 15:30:31 -0700 | [diff] [blame] | 2080 | return PCI_ERS_RESULT_RECOVERED; |
| 2081 | } |
| 2082 | |
| 2083 | static void nvme_error_resume(struct pci_dev *pdev) |
| 2084 | { |
| 2085 | pci_cleanup_aer_uncorrect_error_status(pdev); |
| 2086 | } |
| 2087 | |
Stephen Hemminger | 1d35203 | 2012-09-07 09:33:17 -0700 | [diff] [blame] | 2088 | static const struct pci_error_handlers nvme_err_handler = { |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2089 | .error_detected = nvme_error_detected, |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2090 | .slot_reset = nvme_slot_reset, |
| 2091 | .resume = nvme_error_resume, |
Keith Busch | f0d54a5 | 2014-05-02 10:40:43 -0600 | [diff] [blame] | 2092 | .reset_notify = nvme_reset_notify, |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2093 | }; |
| 2094 | |
| 2095 | /* Move to pci_ids.h later */ |
| 2096 | #define PCI_CLASS_STORAGE_EXPRESS 0x010802 |
| 2097 | |
Matthew Wilcox | 6eb0d69 | 2014-03-24 10:11:22 -0400 | [diff] [blame] | 2098 | static const struct pci_device_id nvme_id_table[] = { |
Christoph Hellwig | 106198e | 2015-11-26 10:07:41 +0100 | [diff] [blame] | 2099 | { PCI_VDEVICE(INTEL, 0x0953), |
Keith Busch | 08095e7 | 2016-03-04 13:15:17 -0700 | [diff] [blame] | 2100 | .driver_data = NVME_QUIRK_STRIPE_SIZE | |
| 2101 | NVME_QUIRK_DISCARD_ZEROES, }, |
Keith Busch | 99466e7 | 2016-05-02 15:14:24 -0600 | [diff] [blame] | 2102 | { PCI_VDEVICE(INTEL, 0x0a53), |
| 2103 | .driver_data = NVME_QUIRK_STRIPE_SIZE | |
| 2104 | NVME_QUIRK_DISCARD_ZEROES, }, |
| 2105 | { PCI_VDEVICE(INTEL, 0x0a54), |
| 2106 | .driver_data = NVME_QUIRK_STRIPE_SIZE | |
| 2107 | NVME_QUIRK_DISCARD_ZEROES, }, |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 2108 | { PCI_VDEVICE(INTEL, 0x5845), /* Qemu emulated controller */ |
| 2109 | .driver_data = NVME_QUIRK_IDENTIFY_CNS, }, |
Guilherme G. Piccoli | 54adc01 | 2016-06-14 18:22:41 -0300 | [diff] [blame] | 2110 | { PCI_DEVICE(0x1c58, 0x0003), /* HGST adapter */ |
| 2111 | .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, |
Wenbo Wang | 015282c | 2016-09-08 12:12:11 -0400 | [diff] [blame] | 2112 | { PCI_DEVICE(0x1c5f, 0x0540), /* Memblaze Pblaze4 adapter */ |
| 2113 | .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2114 | { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, |
Stephan Günther | c74dc78 | 2015-11-04 00:49:45 +0100 | [diff] [blame] | 2115 | { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2001) }, |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2116 | { 0, } |
| 2117 | }; |
| 2118 | MODULE_DEVICE_TABLE(pci, nvme_id_table); |
| 2119 | |
| 2120 | static struct pci_driver nvme_driver = { |
| 2121 | .name = "nvme", |
| 2122 | .id_table = nvme_id_table, |
| 2123 | .probe = nvme_probe, |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 2124 | .remove = nvme_remove, |
Keith Busch | 09ece14 | 2014-01-27 11:29:40 -0500 | [diff] [blame] | 2125 | .shutdown = nvme_shutdown, |
Keith Busch | cd63894 | 2013-07-15 15:02:23 -0600 | [diff] [blame] | 2126 | .driver = { |
| 2127 | .pm = &nvme_dev_pm_ops, |
| 2128 | }, |
Keith Busch | 13880f5 | 2016-06-20 09:41:06 -0600 | [diff] [blame] | 2129 | .sriov_configure = nvme_pci_sriov_configure, |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2130 | .err_handler = &nvme_err_handler, |
| 2131 | }; |
| 2132 | |
| 2133 | static int __init nvme_init(void) |
| 2134 | { |
Matthew Wilcox | 0ac1314 | 2012-07-31 13:31:15 -0400 | [diff] [blame] | 2135 | int result; |
Matthew Wilcox | 1fa6aea | 2011-03-02 18:37:18 -0500 | [diff] [blame] | 2136 | |
Keith Busch | 92f7a16 | 2015-10-23 11:42:02 -0600 | [diff] [blame] | 2137 | nvme_workq = alloc_workqueue("nvme", WQ_UNBOUND | WQ_MEM_RECLAIM, 0); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2138 | if (!nvme_workq) |
Dan McLeran | b9afca3 | 2014-04-07 17:10:11 -0600 | [diff] [blame] | 2139 | return -ENOMEM; |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2140 | |
Keith Busch | f3db22f | 2014-06-11 11:51:35 -0600 | [diff] [blame] | 2141 | result = pci_register_driver(&nvme_driver); |
| 2142 | if (result) |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 2143 | destroy_workqueue(nvme_workq); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2144 | return result; |
| 2145 | } |
| 2146 | |
| 2147 | static void __exit nvme_exit(void) |
| 2148 | { |
| 2149 | pci_unregister_driver(&nvme_driver); |
Keith Busch | 9a6b945 | 2013-12-10 13:10:36 -0700 | [diff] [blame] | 2150 | destroy_workqueue(nvme_workq); |
Matthew Wilcox | 21bd78b | 2014-05-09 22:42:26 -0400 | [diff] [blame] | 2151 | _nvme_check_size(); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2152 | } |
| 2153 | |
| 2154 | MODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); |
| 2155 | MODULE_LICENSE("GPL"); |
Keith Busch | c78b4713 | 2014-11-21 15:16:32 -0700 | [diff] [blame] | 2156 | MODULE_VERSION("1.0"); |
Matthew Wilcox | b60503b | 2011-01-20 12:50:14 -0500 | [diff] [blame] | 2157 | module_init(nvme_init); |
| 2158 | module_exit(nvme_exit); |