157dacad5SJay Sternberg /* 257dacad5SJay Sternberg * NVM Express device driver 357dacad5SJay Sternberg * Copyright (c) 2011-2014, Intel Corporation. 457dacad5SJay Sternberg * 557dacad5SJay Sternberg * This program is free software; you can redistribute it and/or modify it 657dacad5SJay Sternberg * under the terms and conditions of the GNU General Public License, 757dacad5SJay Sternberg * version 2, as published by the Free Software Foundation. 857dacad5SJay Sternberg * 957dacad5SJay Sternberg * This program is distributed in the hope it will be useful, but WITHOUT 1057dacad5SJay Sternberg * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1157dacad5SJay Sternberg * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 1257dacad5SJay Sternberg * more details. 1357dacad5SJay Sternberg */ 1457dacad5SJay Sternberg 15a0a3408eSKeith Busch #include <linux/aer.h> 1657dacad5SJay Sternberg #include <linux/bitops.h> 1757dacad5SJay Sternberg #include <linux/blkdev.h> 1857dacad5SJay Sternberg #include <linux/blk-mq.h> 19dca51e78SChristoph Hellwig #include <linux/blk-mq-pci.h> 20ff5350a8SAndy Lutomirski #include <linux/dmi.h> 2157dacad5SJay Sternberg #include <linux/init.h> 2257dacad5SJay Sternberg #include <linux/interrupt.h> 2357dacad5SJay Sternberg #include <linux/io.h> 2457dacad5SJay Sternberg #include <linux/mm.h> 2557dacad5SJay Sternberg #include <linux/module.h> 2677bf25eaSKeith Busch #include <linux/mutex.h> 2757dacad5SJay Sternberg #include <linux/pci.h> 2857dacad5SJay Sternberg #include <linux/poison.h> 2957dacad5SJay Sternberg #include <linux/t10-pi.h> 302d55cd5fSChristoph Hellwig #include <linux/timer.h> 3157dacad5SJay Sternberg #include <linux/types.h> 329cf5c095SLinus Torvalds #include <linux/io-64-nonatomic-lo-hi.h> 331d277a63SKeith Busch #include <asm/unaligned.h> 34a98e58e5SScott Bauer #include <linux/sed-opal.h> 3557dacad5SJay Sternberg 3657dacad5SJay Sternberg #include "nvme.h" 3757dacad5SJay Sternberg 3857dacad5SJay Sternberg #define NVME_Q_DEPTH 1024 3957dacad5SJay Sternberg #define NVME_AQ_DEPTH 256 4057dacad5SJay Sternberg #define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) 4157dacad5SJay Sternberg #define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) 4257dacad5SJay Sternberg 43adf68f21SChristoph Hellwig /* 44adf68f21SChristoph Hellwig * We handle AEN commands ourselves and don't even let the 45adf68f21SChristoph Hellwig * block layer know about them. 46adf68f21SChristoph Hellwig */ 47f866fc42SChristoph Hellwig #define NVME_AQ_BLKMQ_DEPTH (NVME_AQ_DEPTH - NVME_NR_AERS) 48adf68f21SChristoph Hellwig 4957dacad5SJay Sternberg static int use_threaded_interrupts; 5057dacad5SJay Sternberg module_param(use_threaded_interrupts, int, 0); 5157dacad5SJay Sternberg 5257dacad5SJay Sternberg static bool use_cmb_sqes = true; 5357dacad5SJay Sternberg module_param(use_cmb_sqes, bool, 0644); 5457dacad5SJay Sternberg MODULE_PARM_DESC(use_cmb_sqes, "use controller's memory buffer for I/O SQes"); 5557dacad5SJay Sternberg 5687ad72a5SChristoph Hellwig static unsigned int max_host_mem_size_mb = 128; 5787ad72a5SChristoph Hellwig module_param(max_host_mem_size_mb, uint, 0444); 5887ad72a5SChristoph Hellwig MODULE_PARM_DESC(max_host_mem_size_mb, 5987ad72a5SChristoph Hellwig "Maximum Host Memory Buffer (HMB) size per controller (in MiB)"); 6087ad72a5SChristoph Hellwig 611c63dc66SChristoph Hellwig struct nvme_dev; 621c63dc66SChristoph Hellwig struct nvme_queue; 6357dacad5SJay Sternberg 64a0fa9647SJens Axboe static void nvme_process_cq(struct nvme_queue *nvmeq); 65a5cdb68cSKeith Busch static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown); 6657dacad5SJay Sternberg 6757dacad5SJay Sternberg /* 681c63dc66SChristoph Hellwig * Represents an NVM Express device. Each nvme_dev is a PCI function. 691c63dc66SChristoph Hellwig */ 701c63dc66SChristoph Hellwig struct nvme_dev { 711c63dc66SChristoph Hellwig struct nvme_queue **queues; 721c63dc66SChristoph Hellwig struct blk_mq_tag_set tagset; 731c63dc66SChristoph Hellwig struct blk_mq_tag_set admin_tagset; 741c63dc66SChristoph Hellwig u32 __iomem *dbs; 751c63dc66SChristoph Hellwig struct device *dev; 761c63dc66SChristoph Hellwig struct dma_pool *prp_page_pool; 771c63dc66SChristoph Hellwig struct dma_pool *prp_small_pool; 781c63dc66SChristoph Hellwig unsigned queue_count; 791c63dc66SChristoph Hellwig unsigned online_queues; 801c63dc66SChristoph Hellwig unsigned max_qid; 811c63dc66SChristoph Hellwig int q_depth; 821c63dc66SChristoph Hellwig u32 db_stride; 831c63dc66SChristoph Hellwig void __iomem *bar; 8497f6ef64SXu Yu unsigned long bar_mapped_size; 855c8809e6SChristoph Hellwig struct work_struct remove_work; 8677bf25eaSKeith Busch struct mutex shutdown_lock; 871c63dc66SChristoph Hellwig bool subsystem; 881c63dc66SChristoph Hellwig void __iomem *cmb; 891c63dc66SChristoph Hellwig dma_addr_t cmb_dma_addr; 901c63dc66SChristoph Hellwig u64 cmb_size; 911c63dc66SChristoph Hellwig u32 cmbsz; 92202021c1SStephen Bates u32 cmbloc; 931c63dc66SChristoph Hellwig struct nvme_ctrl ctrl; 94db3cbfffSKeith Busch struct completion ioq_wait; 9587ad72a5SChristoph Hellwig 9687ad72a5SChristoph Hellwig /* shadow doorbell buffer support: */ 97f9f38e33SHelen Koike u32 *dbbuf_dbs; 98f9f38e33SHelen Koike dma_addr_t dbbuf_dbs_dma_addr; 99f9f38e33SHelen Koike u32 *dbbuf_eis; 100f9f38e33SHelen Koike dma_addr_t dbbuf_eis_dma_addr; 10187ad72a5SChristoph Hellwig 10287ad72a5SChristoph Hellwig /* host memory buffer support: */ 10387ad72a5SChristoph Hellwig u64 host_mem_size; 10487ad72a5SChristoph Hellwig u32 nr_host_mem_descs; 10587ad72a5SChristoph Hellwig struct nvme_host_mem_buf_desc *host_mem_descs; 10687ad72a5SChristoph Hellwig void **host_mem_desc_bufs; 10757dacad5SJay Sternberg }; 10857dacad5SJay Sternberg 109f9f38e33SHelen Koike static inline unsigned int sq_idx(unsigned int qid, u32 stride) 110f9f38e33SHelen Koike { 111f9f38e33SHelen Koike return qid * 2 * stride; 112f9f38e33SHelen Koike } 113f9f38e33SHelen Koike 114f9f38e33SHelen Koike static inline unsigned int cq_idx(unsigned int qid, u32 stride) 115f9f38e33SHelen Koike { 116f9f38e33SHelen Koike return (qid * 2 + 1) * stride; 117f9f38e33SHelen Koike } 118f9f38e33SHelen Koike 1191c63dc66SChristoph Hellwig static inline struct nvme_dev *to_nvme_dev(struct nvme_ctrl *ctrl) 1201c63dc66SChristoph Hellwig { 1211c63dc66SChristoph Hellwig return container_of(ctrl, struct nvme_dev, ctrl); 1221c63dc66SChristoph Hellwig } 1231c63dc66SChristoph Hellwig 12457dacad5SJay Sternberg /* 12557dacad5SJay Sternberg * An NVM Express queue. Each device has at least two (one for admin 12657dacad5SJay Sternberg * commands and one for I/O commands). 12757dacad5SJay Sternberg */ 12857dacad5SJay Sternberg struct nvme_queue { 12957dacad5SJay Sternberg struct device *q_dmadev; 13057dacad5SJay Sternberg struct nvme_dev *dev; 13157dacad5SJay Sternberg spinlock_t q_lock; 13257dacad5SJay Sternberg struct nvme_command *sq_cmds; 13357dacad5SJay Sternberg struct nvme_command __iomem *sq_cmds_io; 13457dacad5SJay Sternberg volatile struct nvme_completion *cqes; 13557dacad5SJay Sternberg struct blk_mq_tags **tags; 13657dacad5SJay Sternberg dma_addr_t sq_dma_addr; 13757dacad5SJay Sternberg dma_addr_t cq_dma_addr; 13857dacad5SJay Sternberg u32 __iomem *q_db; 13957dacad5SJay Sternberg u16 q_depth; 14057dacad5SJay Sternberg s16 cq_vector; 14157dacad5SJay Sternberg u16 sq_tail; 14257dacad5SJay Sternberg u16 cq_head; 14357dacad5SJay Sternberg u16 qid; 14457dacad5SJay Sternberg u8 cq_phase; 14557dacad5SJay Sternberg u8 cqe_seen; 146f9f38e33SHelen Koike u32 *dbbuf_sq_db; 147f9f38e33SHelen Koike u32 *dbbuf_cq_db; 148f9f38e33SHelen Koike u32 *dbbuf_sq_ei; 149f9f38e33SHelen Koike u32 *dbbuf_cq_ei; 15057dacad5SJay Sternberg }; 15157dacad5SJay Sternberg 15257dacad5SJay Sternberg /* 15371bd150cSChristoph Hellwig * The nvme_iod describes the data in an I/O, including the list of PRP 15471bd150cSChristoph Hellwig * entries. You can't see it in this data structure because C doesn't let 155f4800d6dSChristoph Hellwig * me express that. Use nvme_init_iod to ensure there's enough space 15671bd150cSChristoph Hellwig * allocated to store the PRP list. 15771bd150cSChristoph Hellwig */ 15871bd150cSChristoph Hellwig struct nvme_iod { 159d49187e9SChristoph Hellwig struct nvme_request req; 160f4800d6dSChristoph Hellwig struct nvme_queue *nvmeq; 161f4800d6dSChristoph Hellwig int aborted; 16271bd150cSChristoph Hellwig int npages; /* In the PRP list. 0 means small pool in use */ 16371bd150cSChristoph Hellwig int nents; /* Used in scatterlist */ 16471bd150cSChristoph Hellwig int length; /* Of data, in bytes */ 16571bd150cSChristoph Hellwig dma_addr_t first_dma; 166bf684057SChristoph Hellwig struct scatterlist meta_sg; /* metadata requires single contiguous buffer */ 167f4800d6dSChristoph Hellwig struct scatterlist *sg; 168f4800d6dSChristoph Hellwig struct scatterlist inline_sg[0]; 16957dacad5SJay Sternberg }; 17057dacad5SJay Sternberg 17157dacad5SJay Sternberg /* 17257dacad5SJay Sternberg * Check we didin't inadvertently grow the command struct 17357dacad5SJay Sternberg */ 17457dacad5SJay Sternberg static inline void _nvme_check_size(void) 17557dacad5SJay Sternberg { 17657dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); 17757dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); 17857dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); 17957dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); 18057dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_features) != 64); 18157dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); 18257dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); 18357dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_command) != 64); 1840add5e8eSJohannes Thumshirn BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != NVME_IDENTIFY_DATA_SIZE); 1850add5e8eSJohannes Thumshirn BUILD_BUG_ON(sizeof(struct nvme_id_ns) != NVME_IDENTIFY_DATA_SIZE); 18657dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); 18757dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); 188f9f38e33SHelen Koike BUILD_BUG_ON(sizeof(struct nvme_dbbuf) != 64); 189f9f38e33SHelen Koike } 190f9f38e33SHelen Koike 191f9f38e33SHelen Koike static inline unsigned int nvme_dbbuf_size(u32 stride) 192f9f38e33SHelen Koike { 193f9f38e33SHelen Koike return ((num_possible_cpus() + 1) * 8 * stride); 194f9f38e33SHelen Koike } 195f9f38e33SHelen Koike 196f9f38e33SHelen Koike static int nvme_dbbuf_dma_alloc(struct nvme_dev *dev) 197f9f38e33SHelen Koike { 198f9f38e33SHelen Koike unsigned int mem_size = nvme_dbbuf_size(dev->db_stride); 199f9f38e33SHelen Koike 200f9f38e33SHelen Koike if (dev->dbbuf_dbs) 201f9f38e33SHelen Koike return 0; 202f9f38e33SHelen Koike 203f9f38e33SHelen Koike dev->dbbuf_dbs = dma_alloc_coherent(dev->dev, mem_size, 204f9f38e33SHelen Koike &dev->dbbuf_dbs_dma_addr, 205f9f38e33SHelen Koike GFP_KERNEL); 206f9f38e33SHelen Koike if (!dev->dbbuf_dbs) 207f9f38e33SHelen Koike return -ENOMEM; 208f9f38e33SHelen Koike dev->dbbuf_eis = dma_alloc_coherent(dev->dev, mem_size, 209f9f38e33SHelen Koike &dev->dbbuf_eis_dma_addr, 210f9f38e33SHelen Koike GFP_KERNEL); 211f9f38e33SHelen Koike if (!dev->dbbuf_eis) { 212f9f38e33SHelen Koike dma_free_coherent(dev->dev, mem_size, 213f9f38e33SHelen Koike dev->dbbuf_dbs, dev->dbbuf_dbs_dma_addr); 214f9f38e33SHelen Koike dev->dbbuf_dbs = NULL; 215f9f38e33SHelen Koike return -ENOMEM; 216f9f38e33SHelen Koike } 217f9f38e33SHelen Koike 218f9f38e33SHelen Koike return 0; 219f9f38e33SHelen Koike } 220f9f38e33SHelen Koike 221f9f38e33SHelen Koike static void nvme_dbbuf_dma_free(struct nvme_dev *dev) 222f9f38e33SHelen Koike { 223f9f38e33SHelen Koike unsigned int mem_size = nvme_dbbuf_size(dev->db_stride); 224f9f38e33SHelen Koike 225f9f38e33SHelen Koike if (dev->dbbuf_dbs) { 226f9f38e33SHelen Koike dma_free_coherent(dev->dev, mem_size, 227f9f38e33SHelen Koike dev->dbbuf_dbs, dev->dbbuf_dbs_dma_addr); 228f9f38e33SHelen Koike dev->dbbuf_dbs = NULL; 229f9f38e33SHelen Koike } 230f9f38e33SHelen Koike if (dev->dbbuf_eis) { 231f9f38e33SHelen Koike dma_free_coherent(dev->dev, mem_size, 232f9f38e33SHelen Koike dev->dbbuf_eis, dev->dbbuf_eis_dma_addr); 233f9f38e33SHelen Koike dev->dbbuf_eis = NULL; 234f9f38e33SHelen Koike } 235f9f38e33SHelen Koike } 236f9f38e33SHelen Koike 237f9f38e33SHelen Koike static void nvme_dbbuf_init(struct nvme_dev *dev, 238f9f38e33SHelen Koike struct nvme_queue *nvmeq, int qid) 239f9f38e33SHelen Koike { 240f9f38e33SHelen Koike if (!dev->dbbuf_dbs || !qid) 241f9f38e33SHelen Koike return; 242f9f38e33SHelen Koike 243f9f38e33SHelen Koike nvmeq->dbbuf_sq_db = &dev->dbbuf_dbs[sq_idx(qid, dev->db_stride)]; 244f9f38e33SHelen Koike nvmeq->dbbuf_cq_db = &dev->dbbuf_dbs[cq_idx(qid, dev->db_stride)]; 245f9f38e33SHelen Koike nvmeq->dbbuf_sq_ei = &dev->dbbuf_eis[sq_idx(qid, dev->db_stride)]; 246f9f38e33SHelen Koike nvmeq->dbbuf_cq_ei = &dev->dbbuf_eis[cq_idx(qid, dev->db_stride)]; 247f9f38e33SHelen Koike } 248f9f38e33SHelen Koike 249f9f38e33SHelen Koike static void nvme_dbbuf_set(struct nvme_dev *dev) 250f9f38e33SHelen Koike { 251f9f38e33SHelen Koike struct nvme_command c; 252f9f38e33SHelen Koike 253f9f38e33SHelen Koike if (!dev->dbbuf_dbs) 254f9f38e33SHelen Koike return; 255f9f38e33SHelen Koike 256f9f38e33SHelen Koike memset(&c, 0, sizeof(c)); 257f9f38e33SHelen Koike c.dbbuf.opcode = nvme_admin_dbbuf; 258f9f38e33SHelen Koike c.dbbuf.prp1 = cpu_to_le64(dev->dbbuf_dbs_dma_addr); 259f9f38e33SHelen Koike c.dbbuf.prp2 = cpu_to_le64(dev->dbbuf_eis_dma_addr); 260f9f38e33SHelen Koike 261f9f38e33SHelen Koike if (nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0)) { 2629bdcfb10SChristoph Hellwig dev_warn(dev->ctrl.device, "unable to set dbbuf\n"); 263f9f38e33SHelen Koike /* Free memory and continue on */ 264f9f38e33SHelen Koike nvme_dbbuf_dma_free(dev); 265f9f38e33SHelen Koike } 266f9f38e33SHelen Koike } 267f9f38e33SHelen Koike 268f9f38e33SHelen Koike static inline int nvme_dbbuf_need_event(u16 event_idx, u16 new_idx, u16 old) 269f9f38e33SHelen Koike { 270f9f38e33SHelen Koike return (u16)(new_idx - event_idx - 1) < (u16)(new_idx - old); 271f9f38e33SHelen Koike } 272f9f38e33SHelen Koike 273f9f38e33SHelen Koike /* Update dbbuf and return true if an MMIO is required */ 274f9f38e33SHelen Koike static bool nvme_dbbuf_update_and_check_event(u16 value, u32 *dbbuf_db, 275f9f38e33SHelen Koike volatile u32 *dbbuf_ei) 276f9f38e33SHelen Koike { 277f9f38e33SHelen Koike if (dbbuf_db) { 278f9f38e33SHelen Koike u16 old_value; 279f9f38e33SHelen Koike 280f9f38e33SHelen Koike /* 281f9f38e33SHelen Koike * Ensure that the queue is written before updating 282f9f38e33SHelen Koike * the doorbell in memory 283f9f38e33SHelen Koike */ 284f9f38e33SHelen Koike wmb(); 285f9f38e33SHelen Koike 286f9f38e33SHelen Koike old_value = *dbbuf_db; 287f9f38e33SHelen Koike *dbbuf_db = value; 288f9f38e33SHelen Koike 289f9f38e33SHelen Koike if (!nvme_dbbuf_need_event(*dbbuf_ei, value, old_value)) 290f9f38e33SHelen Koike return false; 291f9f38e33SHelen Koike } 292f9f38e33SHelen Koike 293f9f38e33SHelen Koike return true; 29457dacad5SJay Sternberg } 29557dacad5SJay Sternberg 29657dacad5SJay Sternberg /* 29757dacad5SJay Sternberg * Max size of iod being embedded in the request payload 29857dacad5SJay Sternberg */ 29957dacad5SJay Sternberg #define NVME_INT_PAGES 2 3005fd4ce1bSChristoph Hellwig #define NVME_INT_BYTES(dev) (NVME_INT_PAGES * (dev)->ctrl.page_size) 30157dacad5SJay Sternberg 30257dacad5SJay Sternberg /* 30357dacad5SJay Sternberg * Will slightly overestimate the number of pages needed. This is OK 30457dacad5SJay Sternberg * as it only leads to a small amount of wasted memory for the lifetime of 30557dacad5SJay Sternberg * the I/O. 30657dacad5SJay Sternberg */ 30757dacad5SJay Sternberg static int nvme_npages(unsigned size, struct nvme_dev *dev) 30857dacad5SJay Sternberg { 3095fd4ce1bSChristoph Hellwig unsigned nprps = DIV_ROUND_UP(size + dev->ctrl.page_size, 3105fd4ce1bSChristoph Hellwig dev->ctrl.page_size); 31157dacad5SJay Sternberg return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); 31257dacad5SJay Sternberg } 31357dacad5SJay Sternberg 314f4800d6dSChristoph Hellwig static unsigned int nvme_iod_alloc_size(struct nvme_dev *dev, 315f4800d6dSChristoph Hellwig unsigned int size, unsigned int nseg) 316f4800d6dSChristoph Hellwig { 317f4800d6dSChristoph Hellwig return sizeof(__le64 *) * nvme_npages(size, dev) + 318f4800d6dSChristoph Hellwig sizeof(struct scatterlist) * nseg; 319f4800d6dSChristoph Hellwig } 320f4800d6dSChristoph Hellwig 32157dacad5SJay Sternberg static unsigned int nvme_cmd_size(struct nvme_dev *dev) 32257dacad5SJay Sternberg { 323f4800d6dSChristoph Hellwig return sizeof(struct nvme_iod) + 324f4800d6dSChristoph Hellwig nvme_iod_alloc_size(dev, NVME_INT_BYTES(dev), NVME_INT_PAGES); 32557dacad5SJay Sternberg } 32657dacad5SJay Sternberg 32757dacad5SJay Sternberg static int nvme_admin_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 32857dacad5SJay Sternberg unsigned int hctx_idx) 32957dacad5SJay Sternberg { 33057dacad5SJay Sternberg struct nvme_dev *dev = data; 33157dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[0]; 33257dacad5SJay Sternberg 33357dacad5SJay Sternberg WARN_ON(hctx_idx != 0); 33457dacad5SJay Sternberg WARN_ON(dev->admin_tagset.tags[0] != hctx->tags); 33557dacad5SJay Sternberg WARN_ON(nvmeq->tags); 33657dacad5SJay Sternberg 33757dacad5SJay Sternberg hctx->driver_data = nvmeq; 33857dacad5SJay Sternberg nvmeq->tags = &dev->admin_tagset.tags[0]; 33957dacad5SJay Sternberg return 0; 34057dacad5SJay Sternberg } 34157dacad5SJay Sternberg 34257dacad5SJay Sternberg static void nvme_admin_exit_hctx(struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx) 34357dacad5SJay Sternberg { 34457dacad5SJay Sternberg struct nvme_queue *nvmeq = hctx->driver_data; 34557dacad5SJay Sternberg 34657dacad5SJay Sternberg nvmeq->tags = NULL; 34757dacad5SJay Sternberg } 34857dacad5SJay Sternberg 34957dacad5SJay Sternberg static int nvme_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 35057dacad5SJay Sternberg unsigned int hctx_idx) 35157dacad5SJay Sternberg { 35257dacad5SJay Sternberg struct nvme_dev *dev = data; 35357dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; 35457dacad5SJay Sternberg 35557dacad5SJay Sternberg if (!nvmeq->tags) 35657dacad5SJay Sternberg nvmeq->tags = &dev->tagset.tags[hctx_idx]; 35757dacad5SJay Sternberg 35857dacad5SJay Sternberg WARN_ON(dev->tagset.tags[hctx_idx] != hctx->tags); 35957dacad5SJay Sternberg hctx->driver_data = nvmeq; 36057dacad5SJay Sternberg return 0; 36157dacad5SJay Sternberg } 36257dacad5SJay Sternberg 363d6296d39SChristoph Hellwig static int nvme_init_request(struct blk_mq_tag_set *set, struct request *req, 364d6296d39SChristoph Hellwig unsigned int hctx_idx, unsigned int numa_node) 36557dacad5SJay Sternberg { 366d6296d39SChristoph Hellwig struct nvme_dev *dev = set->driver_data; 367f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 3680350815aSChristoph Hellwig int queue_idx = (set == &dev->tagset) ? hctx_idx + 1 : 0; 3690350815aSChristoph Hellwig struct nvme_queue *nvmeq = dev->queues[queue_idx]; 37057dacad5SJay Sternberg 37157dacad5SJay Sternberg BUG_ON(!nvmeq); 372f4800d6dSChristoph Hellwig iod->nvmeq = nvmeq; 37357dacad5SJay Sternberg return 0; 37457dacad5SJay Sternberg } 37557dacad5SJay Sternberg 376dca51e78SChristoph Hellwig static int nvme_pci_map_queues(struct blk_mq_tag_set *set) 377dca51e78SChristoph Hellwig { 378dca51e78SChristoph Hellwig struct nvme_dev *dev = set->driver_data; 379dca51e78SChristoph Hellwig 380dca51e78SChristoph Hellwig return blk_mq_pci_map_queues(set, to_pci_dev(dev->dev)); 381dca51e78SChristoph Hellwig } 382dca51e78SChristoph Hellwig 38357dacad5SJay Sternberg /** 384adf68f21SChristoph Hellwig * __nvme_submit_cmd() - Copy a command into a queue and ring the doorbell 38557dacad5SJay Sternberg * @nvmeq: The queue to use 38657dacad5SJay Sternberg * @cmd: The command to send 38757dacad5SJay Sternberg * 38857dacad5SJay Sternberg * Safe to use from interrupt context 38957dacad5SJay Sternberg */ 39057dacad5SJay Sternberg static void __nvme_submit_cmd(struct nvme_queue *nvmeq, 39157dacad5SJay Sternberg struct nvme_command *cmd) 39257dacad5SJay Sternberg { 39357dacad5SJay Sternberg u16 tail = nvmeq->sq_tail; 39457dacad5SJay Sternberg 39557dacad5SJay Sternberg if (nvmeq->sq_cmds_io) 39657dacad5SJay Sternberg memcpy_toio(&nvmeq->sq_cmds_io[tail], cmd, sizeof(*cmd)); 39757dacad5SJay Sternberg else 39857dacad5SJay Sternberg memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); 39957dacad5SJay Sternberg 40057dacad5SJay Sternberg if (++tail == nvmeq->q_depth) 40157dacad5SJay Sternberg tail = 0; 402f9f38e33SHelen Koike if (nvme_dbbuf_update_and_check_event(tail, nvmeq->dbbuf_sq_db, 403f9f38e33SHelen Koike nvmeq->dbbuf_sq_ei)) 40457dacad5SJay Sternberg writel(tail, nvmeq->q_db); 40557dacad5SJay Sternberg nvmeq->sq_tail = tail; 40657dacad5SJay Sternberg } 40757dacad5SJay Sternberg 408f4800d6dSChristoph Hellwig static __le64 **iod_list(struct request *req) 40957dacad5SJay Sternberg { 410f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 411f9d03f96SChristoph Hellwig return (__le64 **)(iod->sg + blk_rq_nr_phys_segments(req)); 41257dacad5SJay Sternberg } 41357dacad5SJay Sternberg 414fc17b653SChristoph Hellwig static blk_status_t nvme_init_iod(struct request *rq, struct nvme_dev *dev) 41557dacad5SJay Sternberg { 416f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(rq); 417f9d03f96SChristoph Hellwig int nseg = blk_rq_nr_phys_segments(rq); 418b131c61dSChristoph Hellwig unsigned int size = blk_rq_payload_bytes(rq); 419f4800d6dSChristoph Hellwig 420f4800d6dSChristoph Hellwig if (nseg > NVME_INT_PAGES || size > NVME_INT_BYTES(dev)) { 421f4800d6dSChristoph Hellwig iod->sg = kmalloc(nvme_iod_alloc_size(dev, size, nseg), GFP_ATOMIC); 422f4800d6dSChristoph Hellwig if (!iod->sg) 423fc17b653SChristoph Hellwig return BLK_STS_RESOURCE; 424f4800d6dSChristoph Hellwig } else { 425f4800d6dSChristoph Hellwig iod->sg = iod->inline_sg; 42657dacad5SJay Sternberg } 42757dacad5SJay Sternberg 428f4800d6dSChristoph Hellwig iod->aborted = 0; 42957dacad5SJay Sternberg iod->npages = -1; 43057dacad5SJay Sternberg iod->nents = 0; 431f4800d6dSChristoph Hellwig iod->length = size; 432f80ec966SKeith Busch 433fc17b653SChristoph Hellwig return BLK_STS_OK; 43457dacad5SJay Sternberg } 43557dacad5SJay Sternberg 436f4800d6dSChristoph Hellwig static void nvme_free_iod(struct nvme_dev *dev, struct request *req) 43757dacad5SJay Sternberg { 438f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 4395fd4ce1bSChristoph Hellwig const int last_prp = dev->ctrl.page_size / 8 - 1; 44057dacad5SJay Sternberg int i; 441f4800d6dSChristoph Hellwig __le64 **list = iod_list(req); 44257dacad5SJay Sternberg dma_addr_t prp_dma = iod->first_dma; 44357dacad5SJay Sternberg 44457dacad5SJay Sternberg if (iod->npages == 0) 44557dacad5SJay Sternberg dma_pool_free(dev->prp_small_pool, list[0], prp_dma); 44657dacad5SJay Sternberg for (i = 0; i < iod->npages; i++) { 44757dacad5SJay Sternberg __le64 *prp_list = list[i]; 44857dacad5SJay Sternberg dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); 44957dacad5SJay Sternberg dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); 45057dacad5SJay Sternberg prp_dma = next_prp_dma; 45157dacad5SJay Sternberg } 45257dacad5SJay Sternberg 453f4800d6dSChristoph Hellwig if (iod->sg != iod->inline_sg) 454f4800d6dSChristoph Hellwig kfree(iod->sg); 45557dacad5SJay Sternberg } 45657dacad5SJay Sternberg 45757dacad5SJay Sternberg #ifdef CONFIG_BLK_DEV_INTEGRITY 45857dacad5SJay Sternberg static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) 45957dacad5SJay Sternberg { 46057dacad5SJay Sternberg if (be32_to_cpu(pi->ref_tag) == v) 46157dacad5SJay Sternberg pi->ref_tag = cpu_to_be32(p); 46257dacad5SJay Sternberg } 46357dacad5SJay Sternberg 46457dacad5SJay Sternberg static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) 46557dacad5SJay Sternberg { 46657dacad5SJay Sternberg if (be32_to_cpu(pi->ref_tag) == p) 46757dacad5SJay Sternberg pi->ref_tag = cpu_to_be32(v); 46857dacad5SJay Sternberg } 46957dacad5SJay Sternberg 47057dacad5SJay Sternberg /** 47157dacad5SJay Sternberg * nvme_dif_remap - remaps ref tags to bip seed and physical lba 47257dacad5SJay Sternberg * 47357dacad5SJay Sternberg * The virtual start sector is the one that was originally submitted by the 47457dacad5SJay Sternberg * block layer. Due to partitioning, MD/DM cloning, etc. the actual physical 47557dacad5SJay Sternberg * start sector may be different. Remap protection information to match the 47657dacad5SJay Sternberg * physical LBA on writes, and back to the original seed on reads. 47757dacad5SJay Sternberg * 47857dacad5SJay Sternberg * Type 0 and 3 do not have a ref tag, so no remapping required. 47957dacad5SJay Sternberg */ 48057dacad5SJay Sternberg static void nvme_dif_remap(struct request *req, 48157dacad5SJay Sternberg void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) 48257dacad5SJay Sternberg { 48357dacad5SJay Sternberg struct nvme_ns *ns = req->rq_disk->private_data; 48457dacad5SJay Sternberg struct bio_integrity_payload *bip; 48557dacad5SJay Sternberg struct t10_pi_tuple *pi; 48657dacad5SJay Sternberg void *p, *pmap; 48757dacad5SJay Sternberg u32 i, nlb, ts, phys, virt; 48857dacad5SJay Sternberg 48957dacad5SJay Sternberg if (!ns->pi_type || ns->pi_type == NVME_NS_DPS_PI_TYPE3) 49057dacad5SJay Sternberg return; 49157dacad5SJay Sternberg 49257dacad5SJay Sternberg bip = bio_integrity(req->bio); 49357dacad5SJay Sternberg if (!bip) 49457dacad5SJay Sternberg return; 49557dacad5SJay Sternberg 49657dacad5SJay Sternberg pmap = kmap_atomic(bip->bip_vec->bv_page) + bip->bip_vec->bv_offset; 49757dacad5SJay Sternberg 49857dacad5SJay Sternberg p = pmap; 49957dacad5SJay Sternberg virt = bip_get_seed(bip); 50057dacad5SJay Sternberg phys = nvme_block_nr(ns, blk_rq_pos(req)); 50157dacad5SJay Sternberg nlb = (blk_rq_bytes(req) >> ns->lba_shift); 502ac6fc48cSDan Williams ts = ns->disk->queue->integrity.tuple_size; 50357dacad5SJay Sternberg 50457dacad5SJay Sternberg for (i = 0; i < nlb; i++, virt++, phys++) { 50557dacad5SJay Sternberg pi = (struct t10_pi_tuple *)p; 50657dacad5SJay Sternberg dif_swap(phys, virt, pi); 50757dacad5SJay Sternberg p += ts; 50857dacad5SJay Sternberg } 50957dacad5SJay Sternberg kunmap_atomic(pmap); 51057dacad5SJay Sternberg } 51157dacad5SJay Sternberg #else /* CONFIG_BLK_DEV_INTEGRITY */ 51257dacad5SJay Sternberg static void nvme_dif_remap(struct request *req, 51357dacad5SJay Sternberg void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) 51457dacad5SJay Sternberg { 51557dacad5SJay Sternberg } 51657dacad5SJay Sternberg static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) 51757dacad5SJay Sternberg { 51857dacad5SJay Sternberg } 51957dacad5SJay Sternberg static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) 52057dacad5SJay Sternberg { 52157dacad5SJay Sternberg } 52257dacad5SJay Sternberg #endif 52357dacad5SJay Sternberg 524b131c61dSChristoph Hellwig static bool nvme_setup_prps(struct nvme_dev *dev, struct request *req) 52557dacad5SJay Sternberg { 526f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 52757dacad5SJay Sternberg struct dma_pool *pool; 528b131c61dSChristoph Hellwig int length = blk_rq_payload_bytes(req); 52957dacad5SJay Sternberg struct scatterlist *sg = iod->sg; 53057dacad5SJay Sternberg int dma_len = sg_dma_len(sg); 53157dacad5SJay Sternberg u64 dma_addr = sg_dma_address(sg); 5325fd4ce1bSChristoph Hellwig u32 page_size = dev->ctrl.page_size; 53357dacad5SJay Sternberg int offset = dma_addr & (page_size - 1); 53457dacad5SJay Sternberg __le64 *prp_list; 535f4800d6dSChristoph Hellwig __le64 **list = iod_list(req); 53657dacad5SJay Sternberg dma_addr_t prp_dma; 53757dacad5SJay Sternberg int nprps, i; 53857dacad5SJay Sternberg 53957dacad5SJay Sternberg length -= (page_size - offset); 54057dacad5SJay Sternberg if (length <= 0) 54169d2b571SChristoph Hellwig return true; 54257dacad5SJay Sternberg 54357dacad5SJay Sternberg dma_len -= (page_size - offset); 54457dacad5SJay Sternberg if (dma_len) { 54557dacad5SJay Sternberg dma_addr += (page_size - offset); 54657dacad5SJay Sternberg } else { 54757dacad5SJay Sternberg sg = sg_next(sg); 54857dacad5SJay Sternberg dma_addr = sg_dma_address(sg); 54957dacad5SJay Sternberg dma_len = sg_dma_len(sg); 55057dacad5SJay Sternberg } 55157dacad5SJay Sternberg 55257dacad5SJay Sternberg if (length <= page_size) { 55357dacad5SJay Sternberg iod->first_dma = dma_addr; 55469d2b571SChristoph Hellwig return true; 55557dacad5SJay Sternberg } 55657dacad5SJay Sternberg 55757dacad5SJay Sternberg nprps = DIV_ROUND_UP(length, page_size); 55857dacad5SJay Sternberg if (nprps <= (256 / 8)) { 55957dacad5SJay Sternberg pool = dev->prp_small_pool; 56057dacad5SJay Sternberg iod->npages = 0; 56157dacad5SJay Sternberg } else { 56257dacad5SJay Sternberg pool = dev->prp_page_pool; 56357dacad5SJay Sternberg iod->npages = 1; 56457dacad5SJay Sternberg } 56557dacad5SJay Sternberg 56669d2b571SChristoph Hellwig prp_list = dma_pool_alloc(pool, GFP_ATOMIC, &prp_dma); 56757dacad5SJay Sternberg if (!prp_list) { 56857dacad5SJay Sternberg iod->first_dma = dma_addr; 56957dacad5SJay Sternberg iod->npages = -1; 57069d2b571SChristoph Hellwig return false; 57157dacad5SJay Sternberg } 57257dacad5SJay Sternberg list[0] = prp_list; 57357dacad5SJay Sternberg iod->first_dma = prp_dma; 57457dacad5SJay Sternberg i = 0; 57557dacad5SJay Sternberg for (;;) { 57657dacad5SJay Sternberg if (i == page_size >> 3) { 57757dacad5SJay Sternberg __le64 *old_prp_list = prp_list; 57869d2b571SChristoph Hellwig prp_list = dma_pool_alloc(pool, GFP_ATOMIC, &prp_dma); 57957dacad5SJay Sternberg if (!prp_list) 58069d2b571SChristoph Hellwig return false; 58157dacad5SJay Sternberg list[iod->npages++] = prp_list; 58257dacad5SJay Sternberg prp_list[0] = old_prp_list[i - 1]; 58357dacad5SJay Sternberg old_prp_list[i - 1] = cpu_to_le64(prp_dma); 58457dacad5SJay Sternberg i = 1; 58557dacad5SJay Sternberg } 58657dacad5SJay Sternberg prp_list[i++] = cpu_to_le64(dma_addr); 58757dacad5SJay Sternberg dma_len -= page_size; 58857dacad5SJay Sternberg dma_addr += page_size; 58957dacad5SJay Sternberg length -= page_size; 59057dacad5SJay Sternberg if (length <= 0) 59157dacad5SJay Sternberg break; 59257dacad5SJay Sternberg if (dma_len > 0) 59357dacad5SJay Sternberg continue; 59457dacad5SJay Sternberg BUG_ON(dma_len < 0); 59557dacad5SJay Sternberg sg = sg_next(sg); 59657dacad5SJay Sternberg dma_addr = sg_dma_address(sg); 59757dacad5SJay Sternberg dma_len = sg_dma_len(sg); 59857dacad5SJay Sternberg } 59957dacad5SJay Sternberg 60069d2b571SChristoph Hellwig return true; 60157dacad5SJay Sternberg } 60257dacad5SJay Sternberg 603fc17b653SChristoph Hellwig static blk_status_t nvme_map_data(struct nvme_dev *dev, struct request *req, 604b131c61dSChristoph Hellwig struct nvme_command *cmnd) 60557dacad5SJay Sternberg { 606f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 607ba1ca37eSChristoph Hellwig struct request_queue *q = req->q; 608ba1ca37eSChristoph Hellwig enum dma_data_direction dma_dir = rq_data_dir(req) ? 609ba1ca37eSChristoph Hellwig DMA_TO_DEVICE : DMA_FROM_DEVICE; 610fc17b653SChristoph Hellwig blk_status_t ret = BLK_STS_IOERR; 61157dacad5SJay Sternberg 612f9d03f96SChristoph Hellwig sg_init_table(iod->sg, blk_rq_nr_phys_segments(req)); 613ba1ca37eSChristoph Hellwig iod->nents = blk_rq_map_sg(q, req, iod->sg); 614ba1ca37eSChristoph Hellwig if (!iod->nents) 615ba1ca37eSChristoph Hellwig goto out; 616ba1ca37eSChristoph Hellwig 617fc17b653SChristoph Hellwig ret = BLK_STS_RESOURCE; 6182b6b535dSMauricio Faria de Oliveira if (!dma_map_sg_attrs(dev->dev, iod->sg, iod->nents, dma_dir, 6192b6b535dSMauricio Faria de Oliveira DMA_ATTR_NO_WARN)) 620ba1ca37eSChristoph Hellwig goto out; 621ba1ca37eSChristoph Hellwig 622b131c61dSChristoph Hellwig if (!nvme_setup_prps(dev, req)) 623ba1ca37eSChristoph Hellwig goto out_unmap; 624ba1ca37eSChristoph Hellwig 625fc17b653SChristoph Hellwig ret = BLK_STS_IOERR; 626ba1ca37eSChristoph Hellwig if (blk_integrity_rq(req)) { 627ba1ca37eSChristoph Hellwig if (blk_rq_count_integrity_sg(q, req->bio) != 1) 628ba1ca37eSChristoph Hellwig goto out_unmap; 629ba1ca37eSChristoph Hellwig 630bf684057SChristoph Hellwig sg_init_table(&iod->meta_sg, 1); 631bf684057SChristoph Hellwig if (blk_rq_map_integrity_sg(q, req->bio, &iod->meta_sg) != 1) 632ba1ca37eSChristoph Hellwig goto out_unmap; 633ba1ca37eSChristoph Hellwig 634ba1ca37eSChristoph Hellwig if (rq_data_dir(req)) 635ba1ca37eSChristoph Hellwig nvme_dif_remap(req, nvme_dif_prep); 636ba1ca37eSChristoph Hellwig 637bf684057SChristoph Hellwig if (!dma_map_sg(dev->dev, &iod->meta_sg, 1, dma_dir)) 638ba1ca37eSChristoph Hellwig goto out_unmap; 63957dacad5SJay Sternberg } 64057dacad5SJay Sternberg 641eb793e2cSChristoph Hellwig cmnd->rw.dptr.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); 642eb793e2cSChristoph Hellwig cmnd->rw.dptr.prp2 = cpu_to_le64(iod->first_dma); 643ba1ca37eSChristoph Hellwig if (blk_integrity_rq(req)) 644bf684057SChristoph Hellwig cmnd->rw.metadata = cpu_to_le64(sg_dma_address(&iod->meta_sg)); 645fc17b653SChristoph Hellwig return BLK_STS_OK; 646ba1ca37eSChristoph Hellwig 647ba1ca37eSChristoph Hellwig out_unmap: 648ba1ca37eSChristoph Hellwig dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); 649ba1ca37eSChristoph Hellwig out: 650ba1ca37eSChristoph Hellwig return ret; 65157dacad5SJay Sternberg } 65257dacad5SJay Sternberg 653f4800d6dSChristoph Hellwig static void nvme_unmap_data(struct nvme_dev *dev, struct request *req) 654d4f6c3abSChristoph Hellwig { 655f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 656d4f6c3abSChristoph Hellwig enum dma_data_direction dma_dir = rq_data_dir(req) ? 657d4f6c3abSChristoph Hellwig DMA_TO_DEVICE : DMA_FROM_DEVICE; 658d4f6c3abSChristoph Hellwig 659d4f6c3abSChristoph Hellwig if (iod->nents) { 660d4f6c3abSChristoph Hellwig dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); 661d4f6c3abSChristoph Hellwig if (blk_integrity_rq(req)) { 662d4f6c3abSChristoph Hellwig if (!rq_data_dir(req)) 663d4f6c3abSChristoph Hellwig nvme_dif_remap(req, nvme_dif_complete); 664bf684057SChristoph Hellwig dma_unmap_sg(dev->dev, &iod->meta_sg, 1, dma_dir); 665d4f6c3abSChristoph Hellwig } 666d4f6c3abSChristoph Hellwig } 667d4f6c3abSChristoph Hellwig 668f9d03f96SChristoph Hellwig nvme_cleanup_cmd(req); 669f4800d6dSChristoph Hellwig nvme_free_iod(dev, req); 67057dacad5SJay Sternberg } 67157dacad5SJay Sternberg 67257dacad5SJay Sternberg /* 67357dacad5SJay Sternberg * NOTE: ns is NULL when called on the admin queue. 67457dacad5SJay Sternberg */ 675fc17b653SChristoph Hellwig static blk_status_t nvme_queue_rq(struct blk_mq_hw_ctx *hctx, 67657dacad5SJay Sternberg const struct blk_mq_queue_data *bd) 67757dacad5SJay Sternberg { 67857dacad5SJay Sternberg struct nvme_ns *ns = hctx->queue->queuedata; 67957dacad5SJay Sternberg struct nvme_queue *nvmeq = hctx->driver_data; 68057dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 68157dacad5SJay Sternberg struct request *req = bd->rq; 682ba1ca37eSChristoph Hellwig struct nvme_command cmnd; 683ebe6d874SChristoph Hellwig blk_status_t ret; 68457dacad5SJay Sternberg 685f9d03f96SChristoph Hellwig ret = nvme_setup_cmd(ns, req, &cmnd); 686fc17b653SChristoph Hellwig if (ret) 687f4800d6dSChristoph Hellwig return ret; 68857dacad5SJay Sternberg 689b131c61dSChristoph Hellwig ret = nvme_init_iod(req, dev); 690fc17b653SChristoph Hellwig if (ret) 691f9d03f96SChristoph Hellwig goto out_free_cmd; 69257dacad5SJay Sternberg 693fc17b653SChristoph Hellwig if (blk_rq_nr_phys_segments(req)) { 694b131c61dSChristoph Hellwig ret = nvme_map_data(dev, req, &cmnd); 695fc17b653SChristoph Hellwig if (ret) 696f9d03f96SChristoph Hellwig goto out_cleanup_iod; 697fc17b653SChristoph Hellwig } 698ba1ca37eSChristoph Hellwig 699aae239e1SChristoph Hellwig blk_mq_start_request(req); 700ba1ca37eSChristoph Hellwig 701ba1ca37eSChristoph Hellwig spin_lock_irq(&nvmeq->q_lock); 702ae1fba20SKeith Busch if (unlikely(nvmeq->cq_vector < 0)) { 703fc17b653SChristoph Hellwig ret = BLK_STS_IOERR; 704ae1fba20SKeith Busch spin_unlock_irq(&nvmeq->q_lock); 705f9d03f96SChristoph Hellwig goto out_cleanup_iod; 706ae1fba20SKeith Busch } 707ba1ca37eSChristoph Hellwig __nvme_submit_cmd(nvmeq, &cmnd); 70857dacad5SJay Sternberg nvme_process_cq(nvmeq); 70957dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 710fc17b653SChristoph Hellwig return BLK_STS_OK; 711f9d03f96SChristoph Hellwig out_cleanup_iod: 712f4800d6dSChristoph Hellwig nvme_free_iod(dev, req); 713f9d03f96SChristoph Hellwig out_free_cmd: 714f9d03f96SChristoph Hellwig nvme_cleanup_cmd(req); 715ba1ca37eSChristoph Hellwig return ret; 71657dacad5SJay Sternberg } 71757dacad5SJay Sternberg 71877f02a7aSChristoph Hellwig static void nvme_pci_complete_rq(struct request *req) 719eee417b0SChristoph Hellwig { 720f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 721eee417b0SChristoph Hellwig 72277f02a7aSChristoph Hellwig nvme_unmap_data(iod->nvmeq->dev, req); 72377f02a7aSChristoph Hellwig nvme_complete_rq(req); 72457dacad5SJay Sternberg } 72557dacad5SJay Sternberg 726d783e0bdSMarta Rybczynska /* We read the CQE phase first to check if the rest of the entry is valid */ 727d783e0bdSMarta Rybczynska static inline bool nvme_cqe_valid(struct nvme_queue *nvmeq, u16 head, 728d783e0bdSMarta Rybczynska u16 phase) 729d783e0bdSMarta Rybczynska { 730d783e0bdSMarta Rybczynska return (le16_to_cpu(nvmeq->cqes[head].status) & 1) == phase; 731d783e0bdSMarta Rybczynska } 732d783e0bdSMarta Rybczynska 733eb281c82SSagi Grimberg static inline void nvme_ring_cq_doorbell(struct nvme_queue *nvmeq) 734eb281c82SSagi Grimberg { 735eb281c82SSagi Grimberg u16 head = nvmeq->cq_head; 736eb281c82SSagi Grimberg 737eb281c82SSagi Grimberg if (likely(nvmeq->cq_vector >= 0)) { 738eb281c82SSagi Grimberg if (nvme_dbbuf_update_and_check_event(head, nvmeq->dbbuf_cq_db, 739eb281c82SSagi Grimberg nvmeq->dbbuf_cq_ei)) 740eb281c82SSagi Grimberg writel(head, nvmeq->q_db + nvmeq->dev->db_stride); 741eb281c82SSagi Grimberg } 742eb281c82SSagi Grimberg } 743eb281c82SSagi Grimberg 744a0fa9647SJens Axboe static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag) 74557dacad5SJay Sternberg { 74657dacad5SJay Sternberg u16 head, phase; 74757dacad5SJay Sternberg 74857dacad5SJay Sternberg head = nvmeq->cq_head; 74957dacad5SJay Sternberg phase = nvmeq->cq_phase; 75057dacad5SJay Sternberg 751d783e0bdSMarta Rybczynska while (nvme_cqe_valid(nvmeq, head, phase)) { 75257dacad5SJay Sternberg struct nvme_completion cqe = nvmeq->cqes[head]; 753eee417b0SChristoph Hellwig struct request *req; 754adf68f21SChristoph Hellwig 75557dacad5SJay Sternberg if (++head == nvmeq->q_depth) { 75657dacad5SJay Sternberg head = 0; 75757dacad5SJay Sternberg phase = !phase; 75857dacad5SJay Sternberg } 759adf68f21SChristoph Hellwig 760a0fa9647SJens Axboe if (tag && *tag == cqe.command_id) 761a0fa9647SJens Axboe *tag = -1; 762adf68f21SChristoph Hellwig 763aae239e1SChristoph Hellwig if (unlikely(cqe.command_id >= nvmeq->q_depth)) { 7641b3c47c1SSagi Grimberg dev_warn(nvmeq->dev->ctrl.device, 765aae239e1SChristoph Hellwig "invalid id %d completed on queue %d\n", 766aae239e1SChristoph Hellwig cqe.command_id, le16_to_cpu(cqe.sq_id)); 767aae239e1SChristoph Hellwig continue; 768aae239e1SChristoph Hellwig } 769aae239e1SChristoph Hellwig 770adf68f21SChristoph Hellwig /* 771adf68f21SChristoph Hellwig * AEN requests are special as they don't time out and can 772adf68f21SChristoph Hellwig * survive any kind of queue freeze and often don't respond to 773adf68f21SChristoph Hellwig * aborts. We don't even bother to allocate a struct request 774adf68f21SChristoph Hellwig * for them but rather special case them here. 775adf68f21SChristoph Hellwig */ 776adf68f21SChristoph Hellwig if (unlikely(nvmeq->qid == 0 && 777adf68f21SChristoph Hellwig cqe.command_id >= NVME_AQ_BLKMQ_DEPTH)) { 7787bf58533SChristoph Hellwig nvme_complete_async_event(&nvmeq->dev->ctrl, 7797bf58533SChristoph Hellwig cqe.status, &cqe.result); 780adf68f21SChristoph Hellwig continue; 781adf68f21SChristoph Hellwig } 782adf68f21SChristoph Hellwig 783eee417b0SChristoph Hellwig req = blk_mq_tag_to_rq(*nvmeq->tags, cqe.command_id); 78427fa9bc5SChristoph Hellwig nvme_end_request(req, cqe.status, cqe.result); 78557dacad5SJay Sternberg } 78657dacad5SJay Sternberg 78757dacad5SJay Sternberg if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 788a0fa9647SJens Axboe return; 78957dacad5SJay Sternberg 79057dacad5SJay Sternberg nvmeq->cq_head = head; 79157dacad5SJay Sternberg nvmeq->cq_phase = phase; 79257dacad5SJay Sternberg 793eb281c82SSagi Grimberg nvme_ring_cq_doorbell(nvmeq); 794eb281c82SSagi Grimberg 79557dacad5SJay Sternberg nvmeq->cqe_seen = 1; 796a0fa9647SJens Axboe } 797a0fa9647SJens Axboe 798a0fa9647SJens Axboe static void nvme_process_cq(struct nvme_queue *nvmeq) 799a0fa9647SJens Axboe { 800a0fa9647SJens Axboe __nvme_process_cq(nvmeq, NULL); 80157dacad5SJay Sternberg } 80257dacad5SJay Sternberg 80357dacad5SJay Sternberg static irqreturn_t nvme_irq(int irq, void *data) 80457dacad5SJay Sternberg { 80557dacad5SJay Sternberg irqreturn_t result; 80657dacad5SJay Sternberg struct nvme_queue *nvmeq = data; 80757dacad5SJay Sternberg spin_lock(&nvmeq->q_lock); 80857dacad5SJay Sternberg nvme_process_cq(nvmeq); 80957dacad5SJay Sternberg result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; 81057dacad5SJay Sternberg nvmeq->cqe_seen = 0; 81157dacad5SJay Sternberg spin_unlock(&nvmeq->q_lock); 81257dacad5SJay Sternberg return result; 81357dacad5SJay Sternberg } 81457dacad5SJay Sternberg 81557dacad5SJay Sternberg static irqreturn_t nvme_irq_check(int irq, void *data) 81657dacad5SJay Sternberg { 81757dacad5SJay Sternberg struct nvme_queue *nvmeq = data; 818d783e0bdSMarta Rybczynska if (nvme_cqe_valid(nvmeq, nvmeq->cq_head, nvmeq->cq_phase)) 81957dacad5SJay Sternberg return IRQ_WAKE_THREAD; 820d783e0bdSMarta Rybczynska return IRQ_NONE; 82157dacad5SJay Sternberg } 82257dacad5SJay Sternberg 8237776db1cSKeith Busch static int __nvme_poll(struct nvme_queue *nvmeq, unsigned int tag) 824a0fa9647SJens Axboe { 825d783e0bdSMarta Rybczynska if (nvme_cqe_valid(nvmeq, nvmeq->cq_head, nvmeq->cq_phase)) { 826a0fa9647SJens Axboe spin_lock_irq(&nvmeq->q_lock); 827a0fa9647SJens Axboe __nvme_process_cq(nvmeq, &tag); 828a0fa9647SJens Axboe spin_unlock_irq(&nvmeq->q_lock); 829a0fa9647SJens Axboe 830a0fa9647SJens Axboe if (tag == -1) 831a0fa9647SJens Axboe return 1; 832a0fa9647SJens Axboe } 833a0fa9647SJens Axboe 834a0fa9647SJens Axboe return 0; 835a0fa9647SJens Axboe } 836a0fa9647SJens Axboe 8377776db1cSKeith Busch static int nvme_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) 8387776db1cSKeith Busch { 8397776db1cSKeith Busch struct nvme_queue *nvmeq = hctx->driver_data; 8407776db1cSKeith Busch 8417776db1cSKeith Busch return __nvme_poll(nvmeq, tag); 8427776db1cSKeith Busch } 8437776db1cSKeith Busch 844f866fc42SChristoph Hellwig static void nvme_pci_submit_async_event(struct nvme_ctrl *ctrl, int aer_idx) 84557dacad5SJay Sternberg { 846f866fc42SChristoph Hellwig struct nvme_dev *dev = to_nvme_dev(ctrl); 8479396dec9SChristoph Hellwig struct nvme_queue *nvmeq = dev->queues[0]; 84857dacad5SJay Sternberg struct nvme_command c; 84957dacad5SJay Sternberg 85057dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 85157dacad5SJay Sternberg c.common.opcode = nvme_admin_async_event; 852f866fc42SChristoph Hellwig c.common.command_id = NVME_AQ_BLKMQ_DEPTH + aer_idx; 85357dacad5SJay Sternberg 8549396dec9SChristoph Hellwig spin_lock_irq(&nvmeq->q_lock); 8559396dec9SChristoph Hellwig __nvme_submit_cmd(nvmeq, &c); 8569396dec9SChristoph Hellwig spin_unlock_irq(&nvmeq->q_lock); 85757dacad5SJay Sternberg } 85857dacad5SJay Sternberg 85957dacad5SJay Sternberg static int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 86057dacad5SJay Sternberg { 86157dacad5SJay Sternberg struct nvme_command c; 86257dacad5SJay Sternberg 86357dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 86457dacad5SJay Sternberg c.delete_queue.opcode = opcode; 86557dacad5SJay Sternberg c.delete_queue.qid = cpu_to_le16(id); 86657dacad5SJay Sternberg 8671c63dc66SChristoph Hellwig return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); 86857dacad5SJay Sternberg } 86957dacad5SJay Sternberg 87057dacad5SJay Sternberg static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 87157dacad5SJay Sternberg struct nvme_queue *nvmeq) 87257dacad5SJay Sternberg { 87357dacad5SJay Sternberg struct nvme_command c; 87457dacad5SJay Sternberg int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 87557dacad5SJay Sternberg 87657dacad5SJay Sternberg /* 87757dacad5SJay Sternberg * Note: we (ab)use the fact the the prp fields survive if no data 87857dacad5SJay Sternberg * is attached to the request. 87957dacad5SJay Sternberg */ 88057dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 88157dacad5SJay Sternberg c.create_cq.opcode = nvme_admin_create_cq; 88257dacad5SJay Sternberg c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 88357dacad5SJay Sternberg c.create_cq.cqid = cpu_to_le16(qid); 88457dacad5SJay Sternberg c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 88557dacad5SJay Sternberg c.create_cq.cq_flags = cpu_to_le16(flags); 88657dacad5SJay Sternberg c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 88757dacad5SJay Sternberg 8881c63dc66SChristoph Hellwig return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); 88957dacad5SJay Sternberg } 89057dacad5SJay Sternberg 89157dacad5SJay Sternberg static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 89257dacad5SJay Sternberg struct nvme_queue *nvmeq) 89357dacad5SJay Sternberg { 89457dacad5SJay Sternberg struct nvme_command c; 89581c1cd98SKeith Busch int flags = NVME_QUEUE_PHYS_CONTIG; 89657dacad5SJay Sternberg 89757dacad5SJay Sternberg /* 89857dacad5SJay Sternberg * Note: we (ab)use the fact the the prp fields survive if no data 89957dacad5SJay Sternberg * is attached to the request. 90057dacad5SJay Sternberg */ 90157dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 90257dacad5SJay Sternberg c.create_sq.opcode = nvme_admin_create_sq; 90357dacad5SJay Sternberg c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 90457dacad5SJay Sternberg c.create_sq.sqid = cpu_to_le16(qid); 90557dacad5SJay Sternberg c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 90657dacad5SJay Sternberg c.create_sq.sq_flags = cpu_to_le16(flags); 90757dacad5SJay Sternberg c.create_sq.cqid = cpu_to_le16(qid); 90857dacad5SJay Sternberg 9091c63dc66SChristoph Hellwig return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); 91057dacad5SJay Sternberg } 91157dacad5SJay Sternberg 91257dacad5SJay Sternberg static int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 91357dacad5SJay Sternberg { 91457dacad5SJay Sternberg return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 91557dacad5SJay Sternberg } 91657dacad5SJay Sternberg 91757dacad5SJay Sternberg static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 91857dacad5SJay Sternberg { 91957dacad5SJay Sternberg return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 92057dacad5SJay Sternberg } 92157dacad5SJay Sternberg 9222a842acaSChristoph Hellwig static void abort_endio(struct request *req, blk_status_t error) 92357dacad5SJay Sternberg { 924f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 925f4800d6dSChristoph Hellwig struct nvme_queue *nvmeq = iod->nvmeq; 92657dacad5SJay Sternberg 92727fa9bc5SChristoph Hellwig dev_warn(nvmeq->dev->ctrl.device, 92827fa9bc5SChristoph Hellwig "Abort status: 0x%x", nvme_req(req)->status); 929e7a2a87dSChristoph Hellwig atomic_inc(&nvmeq->dev->ctrl.abort_limit); 930e7a2a87dSChristoph Hellwig blk_mq_free_request(req); 93157dacad5SJay Sternberg } 93257dacad5SJay Sternberg 933b2a0eb1aSKeith Busch static bool nvme_should_reset(struct nvme_dev *dev, u32 csts) 934b2a0eb1aSKeith Busch { 935b2a0eb1aSKeith Busch 936b2a0eb1aSKeith Busch /* If true, indicates loss of adapter communication, possibly by a 937b2a0eb1aSKeith Busch * NVMe Subsystem reset. 938b2a0eb1aSKeith Busch */ 939b2a0eb1aSKeith Busch bool nssro = dev->subsystem && (csts & NVME_CSTS_NSSRO); 940b2a0eb1aSKeith Busch 941b2a0eb1aSKeith Busch /* If there is a reset ongoing, we shouldn't reset again. */ 942b2a0eb1aSKeith Busch if (dev->ctrl.state == NVME_CTRL_RESETTING) 943b2a0eb1aSKeith Busch return false; 944b2a0eb1aSKeith Busch 945b2a0eb1aSKeith Busch /* We shouldn't reset unless the controller is on fatal error state 946b2a0eb1aSKeith Busch * _or_ if we lost the communication with it. 947b2a0eb1aSKeith Busch */ 948b2a0eb1aSKeith Busch if (!(csts & NVME_CSTS_CFS) && !nssro) 949b2a0eb1aSKeith Busch return false; 950b2a0eb1aSKeith Busch 951b2a0eb1aSKeith Busch /* If PCI error recovery process is happening, we cannot reset or 952b2a0eb1aSKeith Busch * the recovery mechanism will surely fail. 953b2a0eb1aSKeith Busch */ 954b2a0eb1aSKeith Busch if (pci_channel_offline(to_pci_dev(dev->dev))) 955b2a0eb1aSKeith Busch return false; 956b2a0eb1aSKeith Busch 957b2a0eb1aSKeith Busch return true; 958b2a0eb1aSKeith Busch } 959b2a0eb1aSKeith Busch 960b2a0eb1aSKeith Busch static void nvme_warn_reset(struct nvme_dev *dev, u32 csts) 961b2a0eb1aSKeith Busch { 962b2a0eb1aSKeith Busch /* Read a config register to help see what died. */ 963b2a0eb1aSKeith Busch u16 pci_status; 964b2a0eb1aSKeith Busch int result; 965b2a0eb1aSKeith Busch 966b2a0eb1aSKeith Busch result = pci_read_config_word(to_pci_dev(dev->dev), PCI_STATUS, 967b2a0eb1aSKeith Busch &pci_status); 968b2a0eb1aSKeith Busch if (result == PCIBIOS_SUCCESSFUL) 969b2a0eb1aSKeith Busch dev_warn(dev->ctrl.device, 970b2a0eb1aSKeith Busch "controller is down; will reset: CSTS=0x%x, PCI_STATUS=0x%hx\n", 971b2a0eb1aSKeith Busch csts, pci_status); 972b2a0eb1aSKeith Busch else 973b2a0eb1aSKeith Busch dev_warn(dev->ctrl.device, 974b2a0eb1aSKeith Busch "controller is down; will reset: CSTS=0x%x, PCI_STATUS read failed (%d)\n", 975b2a0eb1aSKeith Busch csts, result); 976b2a0eb1aSKeith Busch } 977b2a0eb1aSKeith Busch 97831c7c7d2SChristoph Hellwig static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) 97957dacad5SJay Sternberg { 980f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 981f4800d6dSChristoph Hellwig struct nvme_queue *nvmeq = iod->nvmeq; 98257dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 98357dacad5SJay Sternberg struct request *abort_req; 98457dacad5SJay Sternberg struct nvme_command cmd; 985b2a0eb1aSKeith Busch u32 csts = readl(dev->bar + NVME_REG_CSTS); 986b2a0eb1aSKeith Busch 987b2a0eb1aSKeith Busch /* 988b2a0eb1aSKeith Busch * Reset immediately if the controller is failed 989b2a0eb1aSKeith Busch */ 990b2a0eb1aSKeith Busch if (nvme_should_reset(dev, csts)) { 991b2a0eb1aSKeith Busch nvme_warn_reset(dev, csts); 992b2a0eb1aSKeith Busch nvme_dev_disable(dev, false); 993d86c4d8eSChristoph Hellwig nvme_reset_ctrl(&dev->ctrl); 994b2a0eb1aSKeith Busch return BLK_EH_HANDLED; 995b2a0eb1aSKeith Busch } 99657dacad5SJay Sternberg 99731c7c7d2SChristoph Hellwig /* 9987776db1cSKeith Busch * Did we miss an interrupt? 9997776db1cSKeith Busch */ 10007776db1cSKeith Busch if (__nvme_poll(nvmeq, req->tag)) { 10017776db1cSKeith Busch dev_warn(dev->ctrl.device, 10027776db1cSKeith Busch "I/O %d QID %d timeout, completion polled\n", 10037776db1cSKeith Busch req->tag, nvmeq->qid); 10047776db1cSKeith Busch return BLK_EH_HANDLED; 10057776db1cSKeith Busch } 10067776db1cSKeith Busch 10077776db1cSKeith Busch /* 1008fd634f41SChristoph Hellwig * Shutdown immediately if controller times out while starting. The 1009fd634f41SChristoph Hellwig * reset work will see the pci device disabled when it gets the forced 1010fd634f41SChristoph Hellwig * cancellation error. All outstanding requests are completed on 1011fd634f41SChristoph Hellwig * shutdown, so we return BLK_EH_HANDLED. 1012fd634f41SChristoph Hellwig */ 1013bb8d261eSChristoph Hellwig if (dev->ctrl.state == NVME_CTRL_RESETTING) { 10141b3c47c1SSagi Grimberg dev_warn(dev->ctrl.device, 1015fd634f41SChristoph Hellwig "I/O %d QID %d timeout, disable controller\n", 1016fd634f41SChristoph Hellwig req->tag, nvmeq->qid); 1017a5cdb68cSKeith Busch nvme_dev_disable(dev, false); 101827fa9bc5SChristoph Hellwig nvme_req(req)->flags |= NVME_REQ_CANCELLED; 1019fd634f41SChristoph Hellwig return BLK_EH_HANDLED; 1020fd634f41SChristoph Hellwig } 1021fd634f41SChristoph Hellwig 1022fd634f41SChristoph Hellwig /* 1023e1569a16SKeith Busch * Shutdown the controller immediately and schedule a reset if the 1024e1569a16SKeith Busch * command was already aborted once before and still hasn't been 1025e1569a16SKeith Busch * returned to the driver, or if this is the admin queue. 102631c7c7d2SChristoph Hellwig */ 1027f4800d6dSChristoph Hellwig if (!nvmeq->qid || iod->aborted) { 10281b3c47c1SSagi Grimberg dev_warn(dev->ctrl.device, 102957dacad5SJay Sternberg "I/O %d QID %d timeout, reset controller\n", 103057dacad5SJay Sternberg req->tag, nvmeq->qid); 1031a5cdb68cSKeith Busch nvme_dev_disable(dev, false); 1032d86c4d8eSChristoph Hellwig nvme_reset_ctrl(&dev->ctrl); 1033e1569a16SKeith Busch 1034e1569a16SKeith Busch /* 1035e1569a16SKeith Busch * Mark the request as handled, since the inline shutdown 1036e1569a16SKeith Busch * forces all outstanding requests to complete. 1037e1569a16SKeith Busch */ 103827fa9bc5SChristoph Hellwig nvme_req(req)->flags |= NVME_REQ_CANCELLED; 1039e1569a16SKeith Busch return BLK_EH_HANDLED; 104057dacad5SJay Sternberg } 104157dacad5SJay Sternberg 1042e7a2a87dSChristoph Hellwig if (atomic_dec_return(&dev->ctrl.abort_limit) < 0) { 1043e7a2a87dSChristoph Hellwig atomic_inc(&dev->ctrl.abort_limit); 1044e7a2a87dSChristoph Hellwig return BLK_EH_RESET_TIMER; 1045e7a2a87dSChristoph Hellwig } 10467bf7d778SKeith Busch iod->aborted = 1; 104757dacad5SJay Sternberg 104857dacad5SJay Sternberg memset(&cmd, 0, sizeof(cmd)); 104957dacad5SJay Sternberg cmd.abort.opcode = nvme_admin_abort_cmd; 105057dacad5SJay Sternberg cmd.abort.cid = req->tag; 105157dacad5SJay Sternberg cmd.abort.sqid = cpu_to_le16(nvmeq->qid); 105257dacad5SJay Sternberg 10531b3c47c1SSagi Grimberg dev_warn(nvmeq->dev->ctrl.device, 10541b3c47c1SSagi Grimberg "I/O %d QID %d timeout, aborting\n", 105557dacad5SJay Sternberg req->tag, nvmeq->qid); 1056e7a2a87dSChristoph Hellwig 1057e7a2a87dSChristoph Hellwig abort_req = nvme_alloc_request(dev->ctrl.admin_q, &cmd, 1058eb71f435SChristoph Hellwig BLK_MQ_REQ_NOWAIT, NVME_QID_ANY); 10596bf25d16SChristoph Hellwig if (IS_ERR(abort_req)) { 10606bf25d16SChristoph Hellwig atomic_inc(&dev->ctrl.abort_limit); 106131c7c7d2SChristoph Hellwig return BLK_EH_RESET_TIMER; 106257dacad5SJay Sternberg } 106357dacad5SJay Sternberg 1064e7a2a87dSChristoph Hellwig abort_req->timeout = ADMIN_TIMEOUT; 1065e7a2a87dSChristoph Hellwig abort_req->end_io_data = NULL; 1066e7a2a87dSChristoph Hellwig blk_execute_rq_nowait(abort_req->q, NULL, abort_req, 0, abort_endio); 106757dacad5SJay Sternberg 106857dacad5SJay Sternberg /* 106957dacad5SJay Sternberg * The aborted req will be completed on receiving the abort req. 107057dacad5SJay Sternberg * We enable the timer again. If hit twice, it'll cause a device reset, 107157dacad5SJay Sternberg * as the device then is in a faulty state. 107257dacad5SJay Sternberg */ 107357dacad5SJay Sternberg return BLK_EH_RESET_TIMER; 107457dacad5SJay Sternberg } 107557dacad5SJay Sternberg 107657dacad5SJay Sternberg static void nvme_free_queue(struct nvme_queue *nvmeq) 107757dacad5SJay Sternberg { 107857dacad5SJay Sternberg dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 107957dacad5SJay Sternberg (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 108057dacad5SJay Sternberg if (nvmeq->sq_cmds) 108157dacad5SJay Sternberg dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 108257dacad5SJay Sternberg nvmeq->sq_cmds, nvmeq->sq_dma_addr); 108357dacad5SJay Sternberg kfree(nvmeq); 108457dacad5SJay Sternberg } 108557dacad5SJay Sternberg 108657dacad5SJay Sternberg static void nvme_free_queues(struct nvme_dev *dev, int lowest) 108757dacad5SJay Sternberg { 108857dacad5SJay Sternberg int i; 108957dacad5SJay Sternberg 109057dacad5SJay Sternberg for (i = dev->queue_count - 1; i >= lowest; i--) { 109157dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 109257dacad5SJay Sternberg dev->queue_count--; 109357dacad5SJay Sternberg dev->queues[i] = NULL; 109457dacad5SJay Sternberg nvme_free_queue(nvmeq); 109557dacad5SJay Sternberg } 109657dacad5SJay Sternberg } 109757dacad5SJay Sternberg 109857dacad5SJay Sternberg /** 109957dacad5SJay Sternberg * nvme_suspend_queue - put queue into suspended state 110057dacad5SJay Sternberg * @nvmeq - queue to suspend 110157dacad5SJay Sternberg */ 110257dacad5SJay Sternberg static int nvme_suspend_queue(struct nvme_queue *nvmeq) 110357dacad5SJay Sternberg { 110457dacad5SJay Sternberg int vector; 110557dacad5SJay Sternberg 110657dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 110757dacad5SJay Sternberg if (nvmeq->cq_vector == -1) { 110857dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 110957dacad5SJay Sternberg return 1; 111057dacad5SJay Sternberg } 11110ff199cbSChristoph Hellwig vector = nvmeq->cq_vector; 111257dacad5SJay Sternberg nvmeq->dev->online_queues--; 111357dacad5SJay Sternberg nvmeq->cq_vector = -1; 111457dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 111557dacad5SJay Sternberg 11161c63dc66SChristoph Hellwig if (!nvmeq->qid && nvmeq->dev->ctrl.admin_q) 111725646264SKeith Busch blk_mq_stop_hw_queues(nvmeq->dev->ctrl.admin_q); 111857dacad5SJay Sternberg 11190ff199cbSChristoph Hellwig pci_free_irq(to_pci_dev(nvmeq->dev->dev), vector, nvmeq); 112057dacad5SJay Sternberg 112157dacad5SJay Sternberg return 0; 112257dacad5SJay Sternberg } 112357dacad5SJay Sternberg 1124a5cdb68cSKeith Busch static void nvme_disable_admin_queue(struct nvme_dev *dev, bool shutdown) 112557dacad5SJay Sternberg { 1126a5cdb68cSKeith Busch struct nvme_queue *nvmeq = dev->queues[0]; 112757dacad5SJay Sternberg 112857dacad5SJay Sternberg if (!nvmeq) 112957dacad5SJay Sternberg return; 113057dacad5SJay Sternberg if (nvme_suspend_queue(nvmeq)) 113157dacad5SJay Sternberg return; 113257dacad5SJay Sternberg 1133a5cdb68cSKeith Busch if (shutdown) 1134a5cdb68cSKeith Busch nvme_shutdown_ctrl(&dev->ctrl); 1135a5cdb68cSKeith Busch else 1136a5cdb68cSKeith Busch nvme_disable_ctrl(&dev->ctrl, lo_hi_readq( 1137a5cdb68cSKeith Busch dev->bar + NVME_REG_CAP)); 113857dacad5SJay Sternberg 113957dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 114057dacad5SJay Sternberg nvme_process_cq(nvmeq); 114157dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 114257dacad5SJay Sternberg } 114357dacad5SJay Sternberg 114457dacad5SJay Sternberg static int nvme_cmb_qdepth(struct nvme_dev *dev, int nr_io_queues, 114557dacad5SJay Sternberg int entry_size) 114657dacad5SJay Sternberg { 114757dacad5SJay Sternberg int q_depth = dev->q_depth; 11485fd4ce1bSChristoph Hellwig unsigned q_size_aligned = roundup(q_depth * entry_size, 11495fd4ce1bSChristoph Hellwig dev->ctrl.page_size); 115057dacad5SJay Sternberg 115157dacad5SJay Sternberg if (q_size_aligned * nr_io_queues > dev->cmb_size) { 115257dacad5SJay Sternberg u64 mem_per_q = div_u64(dev->cmb_size, nr_io_queues); 11535fd4ce1bSChristoph Hellwig mem_per_q = round_down(mem_per_q, dev->ctrl.page_size); 115457dacad5SJay Sternberg q_depth = div_u64(mem_per_q, entry_size); 115557dacad5SJay Sternberg 115657dacad5SJay Sternberg /* 115757dacad5SJay Sternberg * Ensure the reduced q_depth is above some threshold where it 115857dacad5SJay Sternberg * would be better to map queues in system memory with the 115957dacad5SJay Sternberg * original depth 116057dacad5SJay Sternberg */ 116157dacad5SJay Sternberg if (q_depth < 64) 116257dacad5SJay Sternberg return -ENOMEM; 116357dacad5SJay Sternberg } 116457dacad5SJay Sternberg 116557dacad5SJay Sternberg return q_depth; 116657dacad5SJay Sternberg } 116757dacad5SJay Sternberg 116857dacad5SJay Sternberg static int nvme_alloc_sq_cmds(struct nvme_dev *dev, struct nvme_queue *nvmeq, 116957dacad5SJay Sternberg int qid, int depth) 117057dacad5SJay Sternberg { 117157dacad5SJay Sternberg if (qid && dev->cmb && use_cmb_sqes && NVME_CMB_SQS(dev->cmbsz)) { 11725fd4ce1bSChristoph Hellwig unsigned offset = (qid - 1) * roundup(SQ_SIZE(depth), 11735fd4ce1bSChristoph Hellwig dev->ctrl.page_size); 117457dacad5SJay Sternberg nvmeq->sq_dma_addr = dev->cmb_dma_addr + offset; 117557dacad5SJay Sternberg nvmeq->sq_cmds_io = dev->cmb + offset; 117657dacad5SJay Sternberg } else { 117757dacad5SJay Sternberg nvmeq->sq_cmds = dma_alloc_coherent(dev->dev, SQ_SIZE(depth), 117857dacad5SJay Sternberg &nvmeq->sq_dma_addr, GFP_KERNEL); 117957dacad5SJay Sternberg if (!nvmeq->sq_cmds) 118057dacad5SJay Sternberg return -ENOMEM; 118157dacad5SJay Sternberg } 118257dacad5SJay Sternberg 118357dacad5SJay Sternberg return 0; 118457dacad5SJay Sternberg } 118557dacad5SJay Sternberg 118657dacad5SJay Sternberg static struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 1187d3af3ecdSShaohua Li int depth, int node) 118857dacad5SJay Sternberg { 1189d3af3ecdSShaohua Li struct nvme_queue *nvmeq = kzalloc_node(sizeof(*nvmeq), GFP_KERNEL, 1190d3af3ecdSShaohua Li node); 119157dacad5SJay Sternberg if (!nvmeq) 119257dacad5SJay Sternberg return NULL; 119357dacad5SJay Sternberg 119457dacad5SJay Sternberg nvmeq->cqes = dma_zalloc_coherent(dev->dev, CQ_SIZE(depth), 119557dacad5SJay Sternberg &nvmeq->cq_dma_addr, GFP_KERNEL); 119657dacad5SJay Sternberg if (!nvmeq->cqes) 119757dacad5SJay Sternberg goto free_nvmeq; 119857dacad5SJay Sternberg 119957dacad5SJay Sternberg if (nvme_alloc_sq_cmds(dev, nvmeq, qid, depth)) 120057dacad5SJay Sternberg goto free_cqdma; 120157dacad5SJay Sternberg 120257dacad5SJay Sternberg nvmeq->q_dmadev = dev->dev; 120357dacad5SJay Sternberg nvmeq->dev = dev; 120457dacad5SJay Sternberg spin_lock_init(&nvmeq->q_lock); 120557dacad5SJay Sternberg nvmeq->cq_head = 0; 120657dacad5SJay Sternberg nvmeq->cq_phase = 1; 120757dacad5SJay Sternberg nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 120857dacad5SJay Sternberg nvmeq->q_depth = depth; 120957dacad5SJay Sternberg nvmeq->qid = qid; 121057dacad5SJay Sternberg nvmeq->cq_vector = -1; 121157dacad5SJay Sternberg dev->queues[qid] = nvmeq; 121257dacad5SJay Sternberg dev->queue_count++; 121357dacad5SJay Sternberg 121457dacad5SJay Sternberg return nvmeq; 121557dacad5SJay Sternberg 121657dacad5SJay Sternberg free_cqdma: 121757dacad5SJay Sternberg dma_free_coherent(dev->dev, CQ_SIZE(depth), (void *)nvmeq->cqes, 121857dacad5SJay Sternberg nvmeq->cq_dma_addr); 121957dacad5SJay Sternberg free_nvmeq: 122057dacad5SJay Sternberg kfree(nvmeq); 122157dacad5SJay Sternberg return NULL; 122257dacad5SJay Sternberg } 122357dacad5SJay Sternberg 1224dca51e78SChristoph Hellwig static int queue_request_irq(struct nvme_queue *nvmeq) 122557dacad5SJay Sternberg { 12260ff199cbSChristoph Hellwig struct pci_dev *pdev = to_pci_dev(nvmeq->dev->dev); 12270ff199cbSChristoph Hellwig int nr = nvmeq->dev->ctrl.instance; 12280ff199cbSChristoph Hellwig 12290ff199cbSChristoph Hellwig if (use_threaded_interrupts) { 12300ff199cbSChristoph Hellwig return pci_request_irq(pdev, nvmeq->cq_vector, nvme_irq_check, 12310ff199cbSChristoph Hellwig nvme_irq, nvmeq, "nvme%dq%d", nr, nvmeq->qid); 12320ff199cbSChristoph Hellwig } else { 12330ff199cbSChristoph Hellwig return pci_request_irq(pdev, nvmeq->cq_vector, nvme_irq, 12340ff199cbSChristoph Hellwig NULL, nvmeq, "nvme%dq%d", nr, nvmeq->qid); 12350ff199cbSChristoph Hellwig } 123657dacad5SJay Sternberg } 123757dacad5SJay Sternberg 123857dacad5SJay Sternberg static void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) 123957dacad5SJay Sternberg { 124057dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 124157dacad5SJay Sternberg 124257dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 124357dacad5SJay Sternberg nvmeq->sq_tail = 0; 124457dacad5SJay Sternberg nvmeq->cq_head = 0; 124557dacad5SJay Sternberg nvmeq->cq_phase = 1; 124657dacad5SJay Sternberg nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 124757dacad5SJay Sternberg memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); 1248f9f38e33SHelen Koike nvme_dbbuf_init(dev, nvmeq, qid); 124957dacad5SJay Sternberg dev->online_queues++; 125057dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 125157dacad5SJay Sternberg } 125257dacad5SJay Sternberg 125357dacad5SJay Sternberg static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) 125457dacad5SJay Sternberg { 125557dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 125657dacad5SJay Sternberg int result; 125757dacad5SJay Sternberg 125857dacad5SJay Sternberg nvmeq->cq_vector = qid - 1; 125957dacad5SJay Sternberg result = adapter_alloc_cq(dev, qid, nvmeq); 126057dacad5SJay Sternberg if (result < 0) 126157dacad5SJay Sternberg return result; 126257dacad5SJay Sternberg 126357dacad5SJay Sternberg result = adapter_alloc_sq(dev, qid, nvmeq); 126457dacad5SJay Sternberg if (result < 0) 126557dacad5SJay Sternberg goto release_cq; 126657dacad5SJay Sternberg 1267dca51e78SChristoph Hellwig result = queue_request_irq(nvmeq); 126857dacad5SJay Sternberg if (result < 0) 126957dacad5SJay Sternberg goto release_sq; 127057dacad5SJay Sternberg 127157dacad5SJay Sternberg nvme_init_queue(nvmeq, qid); 127257dacad5SJay Sternberg return result; 127357dacad5SJay Sternberg 127457dacad5SJay Sternberg release_sq: 127557dacad5SJay Sternberg adapter_delete_sq(dev, qid); 127657dacad5SJay Sternberg release_cq: 127757dacad5SJay Sternberg adapter_delete_cq(dev, qid); 127857dacad5SJay Sternberg return result; 127957dacad5SJay Sternberg } 128057dacad5SJay Sternberg 1281f363b089SEric Biggers static const struct blk_mq_ops nvme_mq_admin_ops = { 128257dacad5SJay Sternberg .queue_rq = nvme_queue_rq, 128377f02a7aSChristoph Hellwig .complete = nvme_pci_complete_rq, 128457dacad5SJay Sternberg .init_hctx = nvme_admin_init_hctx, 128557dacad5SJay Sternberg .exit_hctx = nvme_admin_exit_hctx, 12860350815aSChristoph Hellwig .init_request = nvme_init_request, 128757dacad5SJay Sternberg .timeout = nvme_timeout, 128857dacad5SJay Sternberg }; 128957dacad5SJay Sternberg 1290f363b089SEric Biggers static const struct blk_mq_ops nvme_mq_ops = { 129157dacad5SJay Sternberg .queue_rq = nvme_queue_rq, 129277f02a7aSChristoph Hellwig .complete = nvme_pci_complete_rq, 129357dacad5SJay Sternberg .init_hctx = nvme_init_hctx, 129457dacad5SJay Sternberg .init_request = nvme_init_request, 1295dca51e78SChristoph Hellwig .map_queues = nvme_pci_map_queues, 129657dacad5SJay Sternberg .timeout = nvme_timeout, 1297a0fa9647SJens Axboe .poll = nvme_poll, 129857dacad5SJay Sternberg }; 129957dacad5SJay Sternberg 130057dacad5SJay Sternberg static void nvme_dev_remove_admin(struct nvme_dev *dev) 130157dacad5SJay Sternberg { 13021c63dc66SChristoph Hellwig if (dev->ctrl.admin_q && !blk_queue_dying(dev->ctrl.admin_q)) { 130369d9a99cSKeith Busch /* 130469d9a99cSKeith Busch * If the controller was reset during removal, it's possible 130569d9a99cSKeith Busch * user requests may be waiting on a stopped queue. Start the 130669d9a99cSKeith Busch * queue to flush these to completion. 130769d9a99cSKeith Busch */ 130869d9a99cSKeith Busch blk_mq_start_stopped_hw_queues(dev->ctrl.admin_q, true); 13091c63dc66SChristoph Hellwig blk_cleanup_queue(dev->ctrl.admin_q); 131057dacad5SJay Sternberg blk_mq_free_tag_set(&dev->admin_tagset); 131157dacad5SJay Sternberg } 131257dacad5SJay Sternberg } 131357dacad5SJay Sternberg 131457dacad5SJay Sternberg static int nvme_alloc_admin_tags(struct nvme_dev *dev) 131557dacad5SJay Sternberg { 13161c63dc66SChristoph Hellwig if (!dev->ctrl.admin_q) { 131757dacad5SJay Sternberg dev->admin_tagset.ops = &nvme_mq_admin_ops; 131857dacad5SJay Sternberg dev->admin_tagset.nr_hw_queues = 1; 1319e3e9d50cSKeith Busch 1320e3e9d50cSKeith Busch /* 1321e3e9d50cSKeith Busch * Subtract one to leave an empty queue entry for 'Full Queue' 1322e3e9d50cSKeith Busch * condition. See NVM-Express 1.2 specification, section 4.1.2. 1323e3e9d50cSKeith Busch */ 1324e3e9d50cSKeith Busch dev->admin_tagset.queue_depth = NVME_AQ_BLKMQ_DEPTH - 1; 132557dacad5SJay Sternberg dev->admin_tagset.timeout = ADMIN_TIMEOUT; 132657dacad5SJay Sternberg dev->admin_tagset.numa_node = dev_to_node(dev->dev); 132757dacad5SJay Sternberg dev->admin_tagset.cmd_size = nvme_cmd_size(dev); 1328d3484991SJens Axboe dev->admin_tagset.flags = BLK_MQ_F_NO_SCHED; 132957dacad5SJay Sternberg dev->admin_tagset.driver_data = dev; 133057dacad5SJay Sternberg 133157dacad5SJay Sternberg if (blk_mq_alloc_tag_set(&dev->admin_tagset)) 133257dacad5SJay Sternberg return -ENOMEM; 133357dacad5SJay Sternberg 13341c63dc66SChristoph Hellwig dev->ctrl.admin_q = blk_mq_init_queue(&dev->admin_tagset); 13351c63dc66SChristoph Hellwig if (IS_ERR(dev->ctrl.admin_q)) { 133657dacad5SJay Sternberg blk_mq_free_tag_set(&dev->admin_tagset); 133757dacad5SJay Sternberg return -ENOMEM; 133857dacad5SJay Sternberg } 13391c63dc66SChristoph Hellwig if (!blk_get_queue(dev->ctrl.admin_q)) { 134057dacad5SJay Sternberg nvme_dev_remove_admin(dev); 13411c63dc66SChristoph Hellwig dev->ctrl.admin_q = NULL; 134257dacad5SJay Sternberg return -ENODEV; 134357dacad5SJay Sternberg } 134457dacad5SJay Sternberg } else 134525646264SKeith Busch blk_mq_start_stopped_hw_queues(dev->ctrl.admin_q, true); 134657dacad5SJay Sternberg 134757dacad5SJay Sternberg return 0; 134857dacad5SJay Sternberg } 134957dacad5SJay Sternberg 135097f6ef64SXu Yu static unsigned long db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) 135197f6ef64SXu Yu { 135297f6ef64SXu Yu return NVME_REG_DBS + ((nr_io_queues + 1) * 8 * dev->db_stride); 135397f6ef64SXu Yu } 135497f6ef64SXu Yu 135597f6ef64SXu Yu static int nvme_remap_bar(struct nvme_dev *dev, unsigned long size) 135697f6ef64SXu Yu { 135797f6ef64SXu Yu struct pci_dev *pdev = to_pci_dev(dev->dev); 135897f6ef64SXu Yu 135997f6ef64SXu Yu if (size <= dev->bar_mapped_size) 136097f6ef64SXu Yu return 0; 136197f6ef64SXu Yu if (size > pci_resource_len(pdev, 0)) 136297f6ef64SXu Yu return -ENOMEM; 136397f6ef64SXu Yu if (dev->bar) 136497f6ef64SXu Yu iounmap(dev->bar); 136597f6ef64SXu Yu dev->bar = ioremap(pci_resource_start(pdev, 0), size); 136697f6ef64SXu Yu if (!dev->bar) { 136797f6ef64SXu Yu dev->bar_mapped_size = 0; 136897f6ef64SXu Yu return -ENOMEM; 136997f6ef64SXu Yu } 137097f6ef64SXu Yu dev->bar_mapped_size = size; 137197f6ef64SXu Yu dev->dbs = dev->bar + NVME_REG_DBS; 137297f6ef64SXu Yu 137397f6ef64SXu Yu return 0; 137497f6ef64SXu Yu } 137597f6ef64SXu Yu 137657dacad5SJay Sternberg static int nvme_configure_admin_queue(struct nvme_dev *dev) 137757dacad5SJay Sternberg { 137857dacad5SJay Sternberg int result; 137957dacad5SJay Sternberg u32 aqa; 13807a67cbeaSChristoph Hellwig u64 cap = lo_hi_readq(dev->bar + NVME_REG_CAP); 138157dacad5SJay Sternberg struct nvme_queue *nvmeq; 138257dacad5SJay Sternberg 138397f6ef64SXu Yu result = nvme_remap_bar(dev, db_bar_size(dev, 0)); 138497f6ef64SXu Yu if (result < 0) 138597f6ef64SXu Yu return result; 138697f6ef64SXu Yu 13878ef2074dSGabriel Krisman Bertazi dev->subsystem = readl(dev->bar + NVME_REG_VS) >= NVME_VS(1, 1, 0) ? 138857dacad5SJay Sternberg NVME_CAP_NSSRC(cap) : 0; 138957dacad5SJay Sternberg 13907a67cbeaSChristoph Hellwig if (dev->subsystem && 13917a67cbeaSChristoph Hellwig (readl(dev->bar + NVME_REG_CSTS) & NVME_CSTS_NSSRO)) 13927a67cbeaSChristoph Hellwig writel(NVME_CSTS_NSSRO, dev->bar + NVME_REG_CSTS); 139357dacad5SJay Sternberg 13945fd4ce1bSChristoph Hellwig result = nvme_disable_ctrl(&dev->ctrl, cap); 139557dacad5SJay Sternberg if (result < 0) 139657dacad5SJay Sternberg return result; 139757dacad5SJay Sternberg 139857dacad5SJay Sternberg nvmeq = dev->queues[0]; 139957dacad5SJay Sternberg if (!nvmeq) { 1400d3af3ecdSShaohua Li nvmeq = nvme_alloc_queue(dev, 0, NVME_AQ_DEPTH, 1401d3af3ecdSShaohua Li dev_to_node(dev->dev)); 140257dacad5SJay Sternberg if (!nvmeq) 140357dacad5SJay Sternberg return -ENOMEM; 140457dacad5SJay Sternberg } 140557dacad5SJay Sternberg 140657dacad5SJay Sternberg aqa = nvmeq->q_depth - 1; 140757dacad5SJay Sternberg aqa |= aqa << 16; 140857dacad5SJay Sternberg 14097a67cbeaSChristoph Hellwig writel(aqa, dev->bar + NVME_REG_AQA); 14107a67cbeaSChristoph Hellwig lo_hi_writeq(nvmeq->sq_dma_addr, dev->bar + NVME_REG_ASQ); 14117a67cbeaSChristoph Hellwig lo_hi_writeq(nvmeq->cq_dma_addr, dev->bar + NVME_REG_ACQ); 141257dacad5SJay Sternberg 14135fd4ce1bSChristoph Hellwig result = nvme_enable_ctrl(&dev->ctrl, cap); 141457dacad5SJay Sternberg if (result) 1415d4875622SKeith Busch return result; 141657dacad5SJay Sternberg 141757dacad5SJay Sternberg nvmeq->cq_vector = 0; 1418dca51e78SChristoph Hellwig result = queue_request_irq(nvmeq); 141957dacad5SJay Sternberg if (result) { 142057dacad5SJay Sternberg nvmeq->cq_vector = -1; 1421d4875622SKeith Busch return result; 142257dacad5SJay Sternberg } 142357dacad5SJay Sternberg 142457dacad5SJay Sternberg return result; 142557dacad5SJay Sternberg } 142657dacad5SJay Sternberg 1427749941f2SChristoph Hellwig static int nvme_create_io_queues(struct nvme_dev *dev) 142857dacad5SJay Sternberg { 1429949928c1SKeith Busch unsigned i, max; 1430749941f2SChristoph Hellwig int ret = 0; 143157dacad5SJay Sternberg 1432749941f2SChristoph Hellwig for (i = dev->queue_count; i <= dev->max_qid; i++) { 1433d3af3ecdSShaohua Li /* vector == qid - 1, match nvme_create_queue */ 1434d3af3ecdSShaohua Li if (!nvme_alloc_queue(dev, i, dev->q_depth, 1435d3af3ecdSShaohua Li pci_irq_get_node(to_pci_dev(dev->dev), i - 1))) { 1436749941f2SChristoph Hellwig ret = -ENOMEM; 143757dacad5SJay Sternberg break; 1438749941f2SChristoph Hellwig } 1439749941f2SChristoph Hellwig } 144057dacad5SJay Sternberg 1441949928c1SKeith Busch max = min(dev->max_qid, dev->queue_count - 1); 1442949928c1SKeith Busch for (i = dev->online_queues; i <= max; i++) { 1443749941f2SChristoph Hellwig ret = nvme_create_queue(dev->queues[i], i); 1444d4875622SKeith Busch if (ret) 144557dacad5SJay Sternberg break; 144657dacad5SJay Sternberg } 144757dacad5SJay Sternberg 1448749941f2SChristoph Hellwig /* 1449749941f2SChristoph Hellwig * Ignore failing Create SQ/CQ commands, we can continue with less 1450749941f2SChristoph Hellwig * than the desired aount of queues, and even a controller without 1451749941f2SChristoph Hellwig * I/O queues an still be used to issue admin commands. This might 1452749941f2SChristoph Hellwig * be useful to upgrade a buggy firmware for example. 1453749941f2SChristoph Hellwig */ 1454749941f2SChristoph Hellwig return ret >= 0 ? 0 : ret; 145557dacad5SJay Sternberg } 145657dacad5SJay Sternberg 1457202021c1SStephen Bates static ssize_t nvme_cmb_show(struct device *dev, 1458202021c1SStephen Bates struct device_attribute *attr, 1459202021c1SStephen Bates char *buf) 1460202021c1SStephen Bates { 1461202021c1SStephen Bates struct nvme_dev *ndev = to_nvme_dev(dev_get_drvdata(dev)); 1462202021c1SStephen Bates 1463c965809cSStephen Bates return scnprintf(buf, PAGE_SIZE, "cmbloc : x%08x\ncmbsz : x%08x\n", 1464202021c1SStephen Bates ndev->cmbloc, ndev->cmbsz); 1465202021c1SStephen Bates } 1466202021c1SStephen Bates static DEVICE_ATTR(cmb, S_IRUGO, nvme_cmb_show, NULL); 1467202021c1SStephen Bates 146857dacad5SJay Sternberg static void __iomem *nvme_map_cmb(struct nvme_dev *dev) 146957dacad5SJay Sternberg { 147057dacad5SJay Sternberg u64 szu, size, offset; 147157dacad5SJay Sternberg resource_size_t bar_size; 147257dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 147357dacad5SJay Sternberg void __iomem *cmb; 147457dacad5SJay Sternberg dma_addr_t dma_addr; 147557dacad5SJay Sternberg 14767a67cbeaSChristoph Hellwig dev->cmbsz = readl(dev->bar + NVME_REG_CMBSZ); 147757dacad5SJay Sternberg if (!(NVME_CMB_SZ(dev->cmbsz))) 147857dacad5SJay Sternberg return NULL; 1479202021c1SStephen Bates dev->cmbloc = readl(dev->bar + NVME_REG_CMBLOC); 148057dacad5SJay Sternberg 1481202021c1SStephen Bates if (!use_cmb_sqes) 1482202021c1SStephen Bates return NULL; 148357dacad5SJay Sternberg 148457dacad5SJay Sternberg szu = (u64)1 << (12 + 4 * NVME_CMB_SZU(dev->cmbsz)); 148557dacad5SJay Sternberg size = szu * NVME_CMB_SZ(dev->cmbsz); 1486202021c1SStephen Bates offset = szu * NVME_CMB_OFST(dev->cmbloc); 1487202021c1SStephen Bates bar_size = pci_resource_len(pdev, NVME_CMB_BIR(dev->cmbloc)); 148857dacad5SJay Sternberg 148957dacad5SJay Sternberg if (offset > bar_size) 149057dacad5SJay Sternberg return NULL; 149157dacad5SJay Sternberg 149257dacad5SJay Sternberg /* 149357dacad5SJay Sternberg * Controllers may support a CMB size larger than their BAR, 149457dacad5SJay Sternberg * for example, due to being behind a bridge. Reduce the CMB to 149557dacad5SJay Sternberg * the reported size of the BAR 149657dacad5SJay Sternberg */ 149757dacad5SJay Sternberg if (size > bar_size - offset) 149857dacad5SJay Sternberg size = bar_size - offset; 149957dacad5SJay Sternberg 1500202021c1SStephen Bates dma_addr = pci_resource_start(pdev, NVME_CMB_BIR(dev->cmbloc)) + offset; 150157dacad5SJay Sternberg cmb = ioremap_wc(dma_addr, size); 150257dacad5SJay Sternberg if (!cmb) 150357dacad5SJay Sternberg return NULL; 150457dacad5SJay Sternberg 150557dacad5SJay Sternberg dev->cmb_dma_addr = dma_addr; 150657dacad5SJay Sternberg dev->cmb_size = size; 150757dacad5SJay Sternberg return cmb; 150857dacad5SJay Sternberg } 150957dacad5SJay Sternberg 151057dacad5SJay Sternberg static inline void nvme_release_cmb(struct nvme_dev *dev) 151157dacad5SJay Sternberg { 151257dacad5SJay Sternberg if (dev->cmb) { 151357dacad5SJay Sternberg iounmap(dev->cmb); 151457dacad5SJay Sternberg dev->cmb = NULL; 1515f63572dfSJon Derrick if (dev->cmbsz) { 1516f63572dfSJon Derrick sysfs_remove_file_from_group(&dev->ctrl.device->kobj, 1517f63572dfSJon Derrick &dev_attr_cmb.attr, NULL); 1518f63572dfSJon Derrick dev->cmbsz = 0; 1519f63572dfSJon Derrick } 152057dacad5SJay Sternberg } 152157dacad5SJay Sternberg } 152257dacad5SJay Sternberg 152387ad72a5SChristoph Hellwig static int nvme_set_host_mem(struct nvme_dev *dev, u32 bits) 152487ad72a5SChristoph Hellwig { 152587ad72a5SChristoph Hellwig size_t len = dev->nr_host_mem_descs * sizeof(*dev->host_mem_descs); 152687ad72a5SChristoph Hellwig struct nvme_command c; 152787ad72a5SChristoph Hellwig u64 dma_addr; 152887ad72a5SChristoph Hellwig int ret; 152987ad72a5SChristoph Hellwig 153087ad72a5SChristoph Hellwig dma_addr = dma_map_single(dev->dev, dev->host_mem_descs, len, 153187ad72a5SChristoph Hellwig DMA_TO_DEVICE); 153287ad72a5SChristoph Hellwig if (dma_mapping_error(dev->dev, dma_addr)) 153387ad72a5SChristoph Hellwig return -ENOMEM; 153487ad72a5SChristoph Hellwig 153587ad72a5SChristoph Hellwig memset(&c, 0, sizeof(c)); 153687ad72a5SChristoph Hellwig c.features.opcode = nvme_admin_set_features; 153787ad72a5SChristoph Hellwig c.features.fid = cpu_to_le32(NVME_FEAT_HOST_MEM_BUF); 153887ad72a5SChristoph Hellwig c.features.dword11 = cpu_to_le32(bits); 153987ad72a5SChristoph Hellwig c.features.dword12 = cpu_to_le32(dev->host_mem_size >> 154087ad72a5SChristoph Hellwig ilog2(dev->ctrl.page_size)); 154187ad72a5SChristoph Hellwig c.features.dword13 = cpu_to_le32(lower_32_bits(dma_addr)); 154287ad72a5SChristoph Hellwig c.features.dword14 = cpu_to_le32(upper_32_bits(dma_addr)); 154387ad72a5SChristoph Hellwig c.features.dword15 = cpu_to_le32(dev->nr_host_mem_descs); 154487ad72a5SChristoph Hellwig 154587ad72a5SChristoph Hellwig ret = nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); 154687ad72a5SChristoph Hellwig if (ret) { 154787ad72a5SChristoph Hellwig dev_warn(dev->ctrl.device, 154887ad72a5SChristoph Hellwig "failed to set host mem (err %d, flags %#x).\n", 154987ad72a5SChristoph Hellwig ret, bits); 155087ad72a5SChristoph Hellwig } 155187ad72a5SChristoph Hellwig dma_unmap_single(dev->dev, dma_addr, len, DMA_TO_DEVICE); 155287ad72a5SChristoph Hellwig return ret; 155387ad72a5SChristoph Hellwig } 155487ad72a5SChristoph Hellwig 155587ad72a5SChristoph Hellwig static void nvme_free_host_mem(struct nvme_dev *dev) 155687ad72a5SChristoph Hellwig { 155787ad72a5SChristoph Hellwig int i; 155887ad72a5SChristoph Hellwig 155987ad72a5SChristoph Hellwig for (i = 0; i < dev->nr_host_mem_descs; i++) { 156087ad72a5SChristoph Hellwig struct nvme_host_mem_buf_desc *desc = &dev->host_mem_descs[i]; 156187ad72a5SChristoph Hellwig size_t size = le32_to_cpu(desc->size) * dev->ctrl.page_size; 156287ad72a5SChristoph Hellwig 156387ad72a5SChristoph Hellwig dma_free_coherent(dev->dev, size, dev->host_mem_desc_bufs[i], 156487ad72a5SChristoph Hellwig le64_to_cpu(desc->addr)); 156587ad72a5SChristoph Hellwig } 156687ad72a5SChristoph Hellwig 156787ad72a5SChristoph Hellwig kfree(dev->host_mem_desc_bufs); 156887ad72a5SChristoph Hellwig dev->host_mem_desc_bufs = NULL; 156987ad72a5SChristoph Hellwig kfree(dev->host_mem_descs); 157087ad72a5SChristoph Hellwig dev->host_mem_descs = NULL; 157187ad72a5SChristoph Hellwig } 157287ad72a5SChristoph Hellwig 157387ad72a5SChristoph Hellwig static int nvme_alloc_host_mem(struct nvme_dev *dev, u64 min, u64 preferred) 157487ad72a5SChristoph Hellwig { 157587ad72a5SChristoph Hellwig struct nvme_host_mem_buf_desc *descs; 157687ad72a5SChristoph Hellwig u32 chunk_size, max_entries, i = 0; 157787ad72a5SChristoph Hellwig void **bufs; 157887ad72a5SChristoph Hellwig u64 size, tmp; 157987ad72a5SChristoph Hellwig 158087ad72a5SChristoph Hellwig /* start big and work our way down */ 158187ad72a5SChristoph Hellwig chunk_size = min(preferred, (u64)PAGE_SIZE << MAX_ORDER); 158287ad72a5SChristoph Hellwig retry: 158387ad72a5SChristoph Hellwig tmp = (preferred + chunk_size - 1); 158487ad72a5SChristoph Hellwig do_div(tmp, chunk_size); 158587ad72a5SChristoph Hellwig max_entries = tmp; 158687ad72a5SChristoph Hellwig descs = kcalloc(max_entries, sizeof(*descs), GFP_KERNEL); 158787ad72a5SChristoph Hellwig if (!descs) 158887ad72a5SChristoph Hellwig goto out; 158987ad72a5SChristoph Hellwig 159087ad72a5SChristoph Hellwig bufs = kcalloc(max_entries, sizeof(*bufs), GFP_KERNEL); 159187ad72a5SChristoph Hellwig if (!bufs) 159287ad72a5SChristoph Hellwig goto out_free_descs; 159387ad72a5SChristoph Hellwig 159487ad72a5SChristoph Hellwig for (size = 0; size < preferred; size += chunk_size) { 159587ad72a5SChristoph Hellwig u32 len = min_t(u64, chunk_size, preferred - size); 159687ad72a5SChristoph Hellwig dma_addr_t dma_addr; 159787ad72a5SChristoph Hellwig 159887ad72a5SChristoph Hellwig bufs[i] = dma_alloc_attrs(dev->dev, len, &dma_addr, GFP_KERNEL, 159987ad72a5SChristoph Hellwig DMA_ATTR_NO_KERNEL_MAPPING | DMA_ATTR_NO_WARN); 160087ad72a5SChristoph Hellwig if (!bufs[i]) 160187ad72a5SChristoph Hellwig break; 160287ad72a5SChristoph Hellwig 160387ad72a5SChristoph Hellwig descs[i].addr = cpu_to_le64(dma_addr); 160487ad72a5SChristoph Hellwig descs[i].size = cpu_to_le32(len / dev->ctrl.page_size); 160587ad72a5SChristoph Hellwig i++; 160687ad72a5SChristoph Hellwig } 160787ad72a5SChristoph Hellwig 160887ad72a5SChristoph Hellwig if (!size || (min && size < min)) { 160987ad72a5SChristoph Hellwig dev_warn(dev->ctrl.device, 161087ad72a5SChristoph Hellwig "failed to allocate host memory buffer.\n"); 161187ad72a5SChristoph Hellwig goto out_free_bufs; 161287ad72a5SChristoph Hellwig } 161387ad72a5SChristoph Hellwig 161487ad72a5SChristoph Hellwig dev_info(dev->ctrl.device, 161587ad72a5SChristoph Hellwig "allocated %lld MiB host memory buffer.\n", 161687ad72a5SChristoph Hellwig size >> ilog2(SZ_1M)); 161787ad72a5SChristoph Hellwig dev->nr_host_mem_descs = i; 161887ad72a5SChristoph Hellwig dev->host_mem_size = size; 161987ad72a5SChristoph Hellwig dev->host_mem_descs = descs; 162087ad72a5SChristoph Hellwig dev->host_mem_desc_bufs = bufs; 162187ad72a5SChristoph Hellwig return 0; 162287ad72a5SChristoph Hellwig 162387ad72a5SChristoph Hellwig out_free_bufs: 162487ad72a5SChristoph Hellwig while (--i >= 0) { 162587ad72a5SChristoph Hellwig size_t size = le32_to_cpu(descs[i].size) * dev->ctrl.page_size; 162687ad72a5SChristoph Hellwig 162787ad72a5SChristoph Hellwig dma_free_coherent(dev->dev, size, bufs[i], 162887ad72a5SChristoph Hellwig le64_to_cpu(descs[i].addr)); 162987ad72a5SChristoph Hellwig } 163087ad72a5SChristoph Hellwig 163187ad72a5SChristoph Hellwig kfree(bufs); 163287ad72a5SChristoph Hellwig out_free_descs: 163387ad72a5SChristoph Hellwig kfree(descs); 163487ad72a5SChristoph Hellwig out: 163587ad72a5SChristoph Hellwig /* try a smaller chunk size if we failed early */ 163687ad72a5SChristoph Hellwig if (chunk_size >= PAGE_SIZE * 2 && (i == 0 || size < min)) { 163787ad72a5SChristoph Hellwig chunk_size /= 2; 163887ad72a5SChristoph Hellwig goto retry; 163987ad72a5SChristoph Hellwig } 164087ad72a5SChristoph Hellwig dev->host_mem_descs = NULL; 164187ad72a5SChristoph Hellwig return -ENOMEM; 164287ad72a5SChristoph Hellwig } 164387ad72a5SChristoph Hellwig 164487ad72a5SChristoph Hellwig static void nvme_setup_host_mem(struct nvme_dev *dev) 164587ad72a5SChristoph Hellwig { 164687ad72a5SChristoph Hellwig u64 max = (u64)max_host_mem_size_mb * SZ_1M; 164787ad72a5SChristoph Hellwig u64 preferred = (u64)dev->ctrl.hmpre * 4096; 164887ad72a5SChristoph Hellwig u64 min = (u64)dev->ctrl.hmmin * 4096; 164987ad72a5SChristoph Hellwig u32 enable_bits = NVME_HOST_MEM_ENABLE; 165087ad72a5SChristoph Hellwig 165187ad72a5SChristoph Hellwig preferred = min(preferred, max); 165287ad72a5SChristoph Hellwig if (min > max) { 165387ad72a5SChristoph Hellwig dev_warn(dev->ctrl.device, 165487ad72a5SChristoph Hellwig "min host memory (%lld MiB) above limit (%d MiB).\n", 165587ad72a5SChristoph Hellwig min >> ilog2(SZ_1M), max_host_mem_size_mb); 165687ad72a5SChristoph Hellwig nvme_free_host_mem(dev); 165787ad72a5SChristoph Hellwig return; 165887ad72a5SChristoph Hellwig } 165987ad72a5SChristoph Hellwig 166087ad72a5SChristoph Hellwig /* 166187ad72a5SChristoph Hellwig * If we already have a buffer allocated check if we can reuse it. 166287ad72a5SChristoph Hellwig */ 166387ad72a5SChristoph Hellwig if (dev->host_mem_descs) { 166487ad72a5SChristoph Hellwig if (dev->host_mem_size >= min) 166587ad72a5SChristoph Hellwig enable_bits |= NVME_HOST_MEM_RETURN; 166687ad72a5SChristoph Hellwig else 166787ad72a5SChristoph Hellwig nvme_free_host_mem(dev); 166887ad72a5SChristoph Hellwig } 166987ad72a5SChristoph Hellwig 167087ad72a5SChristoph Hellwig if (!dev->host_mem_descs) { 167187ad72a5SChristoph Hellwig if (nvme_alloc_host_mem(dev, min, preferred)) 167287ad72a5SChristoph Hellwig return; 167387ad72a5SChristoph Hellwig } 167487ad72a5SChristoph Hellwig 167587ad72a5SChristoph Hellwig if (nvme_set_host_mem(dev, enable_bits)) 167687ad72a5SChristoph Hellwig nvme_free_host_mem(dev); 167787ad72a5SChristoph Hellwig } 167887ad72a5SChristoph Hellwig 167957dacad5SJay Sternberg static int nvme_setup_io_queues(struct nvme_dev *dev) 168057dacad5SJay Sternberg { 168157dacad5SJay Sternberg struct nvme_queue *adminq = dev->queues[0]; 168257dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 168397f6ef64SXu Yu int result, nr_io_queues; 168497f6ef64SXu Yu unsigned long size; 168557dacad5SJay Sternberg 16862800b8e7SKeith Busch nr_io_queues = num_online_cpus(); 16879a0be7abSChristoph Hellwig result = nvme_set_queue_count(&dev->ctrl, &nr_io_queues); 16889a0be7abSChristoph Hellwig if (result < 0) 168957dacad5SJay Sternberg return result; 16909a0be7abSChristoph Hellwig 1691f5fa90dcSChristoph Hellwig if (nr_io_queues == 0) 1692a5229050SKeith Busch return 0; 169357dacad5SJay Sternberg 169457dacad5SJay Sternberg if (dev->cmb && NVME_CMB_SQS(dev->cmbsz)) { 169557dacad5SJay Sternberg result = nvme_cmb_qdepth(dev, nr_io_queues, 169657dacad5SJay Sternberg sizeof(struct nvme_command)); 169757dacad5SJay Sternberg if (result > 0) 169857dacad5SJay Sternberg dev->q_depth = result; 169957dacad5SJay Sternberg else 170057dacad5SJay Sternberg nvme_release_cmb(dev); 170157dacad5SJay Sternberg } 170257dacad5SJay Sternberg 170357dacad5SJay Sternberg do { 170497f6ef64SXu Yu size = db_bar_size(dev, nr_io_queues); 170597f6ef64SXu Yu result = nvme_remap_bar(dev, size); 170697f6ef64SXu Yu if (!result) 170757dacad5SJay Sternberg break; 170857dacad5SJay Sternberg if (!--nr_io_queues) 170957dacad5SJay Sternberg return -ENOMEM; 171057dacad5SJay Sternberg } while (1); 171157dacad5SJay Sternberg adminq->q_db = dev->dbs; 171257dacad5SJay Sternberg 171357dacad5SJay Sternberg /* Deregister the admin queue's interrupt */ 17140ff199cbSChristoph Hellwig pci_free_irq(pdev, 0, adminq); 171557dacad5SJay Sternberg 171657dacad5SJay Sternberg /* 171757dacad5SJay Sternberg * If we enable msix early due to not intx, disable it again before 171857dacad5SJay Sternberg * setting up the full range we need. 171957dacad5SJay Sternberg */ 1720dca51e78SChristoph Hellwig pci_free_irq_vectors(pdev); 1721dca51e78SChristoph Hellwig nr_io_queues = pci_alloc_irq_vectors(pdev, 1, nr_io_queues, 1722dca51e78SChristoph Hellwig PCI_IRQ_ALL_TYPES | PCI_IRQ_AFFINITY); 1723dca51e78SChristoph Hellwig if (nr_io_queues <= 0) 1724dca51e78SChristoph Hellwig return -EIO; 1725dca51e78SChristoph Hellwig dev->max_qid = nr_io_queues; 172657dacad5SJay Sternberg 172757dacad5SJay Sternberg /* 172857dacad5SJay Sternberg * Should investigate if there's a performance win from allocating 172957dacad5SJay Sternberg * more queues than interrupt vectors; it might allow the submission 173057dacad5SJay Sternberg * path to scale better, even if the receive path is limited by the 173157dacad5SJay Sternberg * number of interrupts. 173257dacad5SJay Sternberg */ 173357dacad5SJay Sternberg 1734dca51e78SChristoph Hellwig result = queue_request_irq(adminq); 173557dacad5SJay Sternberg if (result) { 173657dacad5SJay Sternberg adminq->cq_vector = -1; 1737d4875622SKeith Busch return result; 173857dacad5SJay Sternberg } 1739749941f2SChristoph Hellwig return nvme_create_io_queues(dev); 174057dacad5SJay Sternberg } 174157dacad5SJay Sternberg 17422a842acaSChristoph Hellwig static void nvme_del_queue_end(struct request *req, blk_status_t error) 1743db3cbfffSKeith Busch { 1744db3cbfffSKeith Busch struct nvme_queue *nvmeq = req->end_io_data; 1745db3cbfffSKeith Busch 1746db3cbfffSKeith Busch blk_mq_free_request(req); 1747db3cbfffSKeith Busch complete(&nvmeq->dev->ioq_wait); 1748db3cbfffSKeith Busch } 1749db3cbfffSKeith Busch 17502a842acaSChristoph Hellwig static void nvme_del_cq_end(struct request *req, blk_status_t error) 1751db3cbfffSKeith Busch { 1752db3cbfffSKeith Busch struct nvme_queue *nvmeq = req->end_io_data; 1753db3cbfffSKeith Busch 1754db3cbfffSKeith Busch if (!error) { 1755db3cbfffSKeith Busch unsigned long flags; 1756db3cbfffSKeith Busch 17572e39e0f6SMing Lin /* 17582e39e0f6SMing Lin * We might be called with the AQ q_lock held 17592e39e0f6SMing Lin * and the I/O queue q_lock should always 17602e39e0f6SMing Lin * nest inside the AQ one. 17612e39e0f6SMing Lin */ 17622e39e0f6SMing Lin spin_lock_irqsave_nested(&nvmeq->q_lock, flags, 17632e39e0f6SMing Lin SINGLE_DEPTH_NESTING); 1764db3cbfffSKeith Busch nvme_process_cq(nvmeq); 1765db3cbfffSKeith Busch spin_unlock_irqrestore(&nvmeq->q_lock, flags); 1766db3cbfffSKeith Busch } 1767db3cbfffSKeith Busch 1768db3cbfffSKeith Busch nvme_del_queue_end(req, error); 1769db3cbfffSKeith Busch } 1770db3cbfffSKeith Busch 1771db3cbfffSKeith Busch static int nvme_delete_queue(struct nvme_queue *nvmeq, u8 opcode) 1772db3cbfffSKeith Busch { 1773db3cbfffSKeith Busch struct request_queue *q = nvmeq->dev->ctrl.admin_q; 1774db3cbfffSKeith Busch struct request *req; 1775db3cbfffSKeith Busch struct nvme_command cmd; 1776db3cbfffSKeith Busch 1777db3cbfffSKeith Busch memset(&cmd, 0, sizeof(cmd)); 1778db3cbfffSKeith Busch cmd.delete_queue.opcode = opcode; 1779db3cbfffSKeith Busch cmd.delete_queue.qid = cpu_to_le16(nvmeq->qid); 1780db3cbfffSKeith Busch 1781eb71f435SChristoph Hellwig req = nvme_alloc_request(q, &cmd, BLK_MQ_REQ_NOWAIT, NVME_QID_ANY); 1782db3cbfffSKeith Busch if (IS_ERR(req)) 1783db3cbfffSKeith Busch return PTR_ERR(req); 1784db3cbfffSKeith Busch 1785db3cbfffSKeith Busch req->timeout = ADMIN_TIMEOUT; 1786db3cbfffSKeith Busch req->end_io_data = nvmeq; 1787db3cbfffSKeith Busch 1788db3cbfffSKeith Busch blk_execute_rq_nowait(q, NULL, req, false, 1789db3cbfffSKeith Busch opcode == nvme_admin_delete_cq ? 1790db3cbfffSKeith Busch nvme_del_cq_end : nvme_del_queue_end); 1791db3cbfffSKeith Busch return 0; 1792db3cbfffSKeith Busch } 1793db3cbfffSKeith Busch 179470659060SKeith Busch static void nvme_disable_io_queues(struct nvme_dev *dev, int queues) 1795db3cbfffSKeith Busch { 179670659060SKeith Busch int pass; 1797db3cbfffSKeith Busch unsigned long timeout; 1798db3cbfffSKeith Busch u8 opcode = nvme_admin_delete_sq; 1799db3cbfffSKeith Busch 1800db3cbfffSKeith Busch for (pass = 0; pass < 2; pass++) { 1801014a0d60SKeith Busch int sent = 0, i = queues; 1802db3cbfffSKeith Busch 1803db3cbfffSKeith Busch reinit_completion(&dev->ioq_wait); 1804db3cbfffSKeith Busch retry: 1805db3cbfffSKeith Busch timeout = ADMIN_TIMEOUT; 1806c21377f8SGabriel Krisman Bertazi for (; i > 0; i--, sent++) 1807c21377f8SGabriel Krisman Bertazi if (nvme_delete_queue(dev->queues[i], opcode)) 1808db3cbfffSKeith Busch break; 1809c21377f8SGabriel Krisman Bertazi 1810db3cbfffSKeith Busch while (sent--) { 1811db3cbfffSKeith Busch timeout = wait_for_completion_io_timeout(&dev->ioq_wait, timeout); 1812db3cbfffSKeith Busch if (timeout == 0) 1813db3cbfffSKeith Busch return; 1814db3cbfffSKeith Busch if (i) 1815db3cbfffSKeith Busch goto retry; 1816db3cbfffSKeith Busch } 1817db3cbfffSKeith Busch opcode = nvme_admin_delete_cq; 1818db3cbfffSKeith Busch } 1819db3cbfffSKeith Busch } 1820db3cbfffSKeith Busch 182157dacad5SJay Sternberg /* 182257dacad5SJay Sternberg * Return: error value if an error occurred setting up the queues or calling 182357dacad5SJay Sternberg * Identify Device. 0 if these succeeded, even if adding some of the 182457dacad5SJay Sternberg * namespaces failed. At the moment, these failures are silent. TBD which 182557dacad5SJay Sternberg * failures should be reported. 182657dacad5SJay Sternberg */ 182757dacad5SJay Sternberg static int nvme_dev_add(struct nvme_dev *dev) 182857dacad5SJay Sternberg { 18295bae7f73SChristoph Hellwig if (!dev->ctrl.tagset) { 183057dacad5SJay Sternberg dev->tagset.ops = &nvme_mq_ops; 183157dacad5SJay Sternberg dev->tagset.nr_hw_queues = dev->online_queues - 1; 183257dacad5SJay Sternberg dev->tagset.timeout = NVME_IO_TIMEOUT; 183357dacad5SJay Sternberg dev->tagset.numa_node = dev_to_node(dev->dev); 183457dacad5SJay Sternberg dev->tagset.queue_depth = 183557dacad5SJay Sternberg min_t(int, dev->q_depth, BLK_MQ_MAX_DEPTH) - 1; 183657dacad5SJay Sternberg dev->tagset.cmd_size = nvme_cmd_size(dev); 183757dacad5SJay Sternberg dev->tagset.flags = BLK_MQ_F_SHOULD_MERGE; 183857dacad5SJay Sternberg dev->tagset.driver_data = dev; 183957dacad5SJay Sternberg 184057dacad5SJay Sternberg if (blk_mq_alloc_tag_set(&dev->tagset)) 184157dacad5SJay Sternberg return 0; 18425bae7f73SChristoph Hellwig dev->ctrl.tagset = &dev->tagset; 1843f9f38e33SHelen Koike 1844f9f38e33SHelen Koike nvme_dbbuf_set(dev); 1845949928c1SKeith Busch } else { 1846949928c1SKeith Busch blk_mq_update_nr_hw_queues(&dev->tagset, dev->online_queues - 1); 1847949928c1SKeith Busch 1848949928c1SKeith Busch /* Free previously allocated queues that are no longer usable */ 1849949928c1SKeith Busch nvme_free_queues(dev, dev->online_queues); 185057dacad5SJay Sternberg } 1851949928c1SKeith Busch 185257dacad5SJay Sternberg return 0; 185357dacad5SJay Sternberg } 185457dacad5SJay Sternberg 1855b00a726aSKeith Busch static int nvme_pci_enable(struct nvme_dev *dev) 185657dacad5SJay Sternberg { 185757dacad5SJay Sternberg u64 cap; 1858b00a726aSKeith Busch int result = -ENOMEM; 185957dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 186057dacad5SJay Sternberg 186157dacad5SJay Sternberg if (pci_enable_device_mem(pdev)) 186257dacad5SJay Sternberg return result; 186357dacad5SJay Sternberg 186457dacad5SJay Sternberg pci_set_master(pdev); 186557dacad5SJay Sternberg 186657dacad5SJay Sternberg if (dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(64)) && 186757dacad5SJay Sternberg dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(32))) 186857dacad5SJay Sternberg goto disable; 186957dacad5SJay Sternberg 18707a67cbeaSChristoph Hellwig if (readl(dev->bar + NVME_REG_CSTS) == -1) { 187157dacad5SJay Sternberg result = -ENODEV; 1872b00a726aSKeith Busch goto disable; 187357dacad5SJay Sternberg } 187457dacad5SJay Sternberg 187557dacad5SJay Sternberg /* 1876a5229050SKeith Busch * Some devices and/or platforms don't advertise or work with INTx 1877a5229050SKeith Busch * interrupts. Pre-enable a single MSIX or MSI vec for setup. We'll 1878a5229050SKeith Busch * adjust this later. 187957dacad5SJay Sternberg */ 1880dca51e78SChristoph Hellwig result = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES); 1881dca51e78SChristoph Hellwig if (result < 0) 1882dca51e78SChristoph Hellwig return result; 188357dacad5SJay Sternberg 18847a67cbeaSChristoph Hellwig cap = lo_hi_readq(dev->bar + NVME_REG_CAP); 18857a67cbeaSChristoph Hellwig 188657dacad5SJay Sternberg dev->q_depth = min_t(int, NVME_CAP_MQES(cap) + 1, NVME_Q_DEPTH); 188757dacad5SJay Sternberg dev->db_stride = 1 << NVME_CAP_STRIDE(cap); 18887a67cbeaSChristoph Hellwig dev->dbs = dev->bar + 4096; 18891f390c1fSStephan Günther 18901f390c1fSStephan Günther /* 18911f390c1fSStephan Günther * Temporary fix for the Apple controller found in the MacBook8,1 and 18921f390c1fSStephan Günther * some MacBook7,1 to avoid controller resets and data loss. 18931f390c1fSStephan Günther */ 18941f390c1fSStephan Günther if (pdev->vendor == PCI_VENDOR_ID_APPLE && pdev->device == 0x2001) { 18951f390c1fSStephan Günther dev->q_depth = 2; 18969bdcfb10SChristoph Hellwig dev_warn(dev->ctrl.device, "detected Apple NVMe controller, " 18979bdcfb10SChristoph Hellwig "set queue depth=%u to work around controller resets\n", 18981f390c1fSStephan Günther dev->q_depth); 18991f390c1fSStephan Günther } 19001f390c1fSStephan Günther 1901202021c1SStephen Bates /* 1902202021c1SStephen Bates * CMBs can currently only exist on >=1.2 PCIe devices. We only 1903202021c1SStephen Bates * populate sysfs if a CMB is implemented. Note that we add the 1904202021c1SStephen Bates * CMB attribute to the nvme_ctrl kobj which removes the need to remove 1905202021c1SStephen Bates * it on exit. Since nvme_dev_attrs_group has no name we can pass 1906202021c1SStephen Bates * NULL as final argument to sysfs_add_file_to_group. 1907202021c1SStephen Bates */ 1908202021c1SStephen Bates 19098ef2074dSGabriel Krisman Bertazi if (readl(dev->bar + NVME_REG_VS) >= NVME_VS(1, 2, 0)) { 191057dacad5SJay Sternberg dev->cmb = nvme_map_cmb(dev); 191157dacad5SJay Sternberg 1912202021c1SStephen Bates if (dev->cmbsz) { 1913202021c1SStephen Bates if (sysfs_add_file_to_group(&dev->ctrl.device->kobj, 1914202021c1SStephen Bates &dev_attr_cmb.attr, NULL)) 19159bdcfb10SChristoph Hellwig dev_warn(dev->ctrl.device, 1916202021c1SStephen Bates "failed to add sysfs attribute for CMB\n"); 1917202021c1SStephen Bates } 1918202021c1SStephen Bates } 1919202021c1SStephen Bates 1920a0a3408eSKeith Busch pci_enable_pcie_error_reporting(pdev); 1921a0a3408eSKeith Busch pci_save_state(pdev); 192257dacad5SJay Sternberg return 0; 192357dacad5SJay Sternberg 192457dacad5SJay Sternberg disable: 192557dacad5SJay Sternberg pci_disable_device(pdev); 192657dacad5SJay Sternberg return result; 192757dacad5SJay Sternberg } 192857dacad5SJay Sternberg 192957dacad5SJay Sternberg static void nvme_dev_unmap(struct nvme_dev *dev) 193057dacad5SJay Sternberg { 1931b00a726aSKeith Busch if (dev->bar) 1932b00a726aSKeith Busch iounmap(dev->bar); 1933a1f447b3SJohannes Thumshirn pci_release_mem_regions(to_pci_dev(dev->dev)); 1934b00a726aSKeith Busch } 1935b00a726aSKeith Busch 1936b00a726aSKeith Busch static void nvme_pci_disable(struct nvme_dev *dev) 1937b00a726aSKeith Busch { 193857dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 193957dacad5SJay Sternberg 1940f63572dfSJon Derrick nvme_release_cmb(dev); 1941dca51e78SChristoph Hellwig pci_free_irq_vectors(pdev); 194257dacad5SJay Sternberg 1943a0a3408eSKeith Busch if (pci_is_enabled(pdev)) { 1944a0a3408eSKeith Busch pci_disable_pcie_error_reporting(pdev); 194557dacad5SJay Sternberg pci_disable_device(pdev); 194657dacad5SJay Sternberg } 1947a0a3408eSKeith Busch } 194857dacad5SJay Sternberg 1949a5cdb68cSKeith Busch static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown) 195057dacad5SJay Sternberg { 195170659060SKeith Busch int i, queues; 1952302ad8ccSKeith Busch bool dead = true; 1953302ad8ccSKeith Busch struct pci_dev *pdev = to_pci_dev(dev->dev); 195457dacad5SJay Sternberg 195577bf25eaSKeith Busch mutex_lock(&dev->shutdown_lock); 1956302ad8ccSKeith Busch if (pci_is_enabled(pdev)) { 1957302ad8ccSKeith Busch u32 csts = readl(dev->bar + NVME_REG_CSTS); 1958302ad8ccSKeith Busch 1959302ad8ccSKeith Busch if (dev->ctrl.state == NVME_CTRL_LIVE) 1960302ad8ccSKeith Busch nvme_start_freeze(&dev->ctrl); 1961302ad8ccSKeith Busch dead = !!((csts & NVME_CSTS_CFS) || !(csts & NVME_CSTS_RDY) || 1962302ad8ccSKeith Busch pdev->error_state != pci_channel_io_normal); 196357dacad5SJay Sternberg } 1964c21377f8SGabriel Krisman Bertazi 1965302ad8ccSKeith Busch /* 1966302ad8ccSKeith Busch * Give the controller a chance to complete all entered requests if 1967302ad8ccSKeith Busch * doing a safe shutdown. 1968302ad8ccSKeith Busch */ 196987ad72a5SChristoph Hellwig if (!dead) { 197087ad72a5SChristoph Hellwig if (shutdown) 1971302ad8ccSKeith Busch nvme_wait_freeze_timeout(&dev->ctrl, NVME_IO_TIMEOUT); 197287ad72a5SChristoph Hellwig 197387ad72a5SChristoph Hellwig /* 197487ad72a5SChristoph Hellwig * If the controller is still alive tell it to stop using the 197587ad72a5SChristoph Hellwig * host memory buffer. In theory the shutdown / reset should 197687ad72a5SChristoph Hellwig * make sure that it doesn't access the host memoery anymore, 197787ad72a5SChristoph Hellwig * but I'd rather be safe than sorry.. 197887ad72a5SChristoph Hellwig */ 197987ad72a5SChristoph Hellwig if (dev->host_mem_descs) 198087ad72a5SChristoph Hellwig nvme_set_host_mem(dev, 0); 198187ad72a5SChristoph Hellwig 198287ad72a5SChristoph Hellwig } 1983302ad8ccSKeith Busch nvme_stop_queues(&dev->ctrl); 1984302ad8ccSKeith Busch 198570659060SKeith Busch queues = dev->online_queues - 1; 1986c21377f8SGabriel Krisman Bertazi for (i = dev->queue_count - 1; i > 0; i--) 1987c21377f8SGabriel Krisman Bertazi nvme_suspend_queue(dev->queues[i]); 1988c21377f8SGabriel Krisman Bertazi 1989302ad8ccSKeith Busch if (dead) { 199082469c59SGabriel Krisman Bertazi /* A device might become IO incapable very soon during 199182469c59SGabriel Krisman Bertazi * probe, before the admin queue is configured. Thus, 199282469c59SGabriel Krisman Bertazi * queue_count can be 0 here. 199382469c59SGabriel Krisman Bertazi */ 199482469c59SGabriel Krisman Bertazi if (dev->queue_count) 1995c21377f8SGabriel Krisman Bertazi nvme_suspend_queue(dev->queues[0]); 199657dacad5SJay Sternberg } else { 199770659060SKeith Busch nvme_disable_io_queues(dev, queues); 1998a5cdb68cSKeith Busch nvme_disable_admin_queue(dev, shutdown); 199957dacad5SJay Sternberg } 2000b00a726aSKeith Busch nvme_pci_disable(dev); 200157dacad5SJay Sternberg 2002e1958e65SMing Lin blk_mq_tagset_busy_iter(&dev->tagset, nvme_cancel_request, &dev->ctrl); 2003e1958e65SMing Lin blk_mq_tagset_busy_iter(&dev->admin_tagset, nvme_cancel_request, &dev->ctrl); 2004302ad8ccSKeith Busch 2005302ad8ccSKeith Busch /* 2006302ad8ccSKeith Busch * The driver will not be starting up queues again if shutting down so 2007302ad8ccSKeith Busch * must flush all entered requests to their failed completion to avoid 2008302ad8ccSKeith Busch * deadlocking blk-mq hot-cpu notifier. 2009302ad8ccSKeith Busch */ 2010302ad8ccSKeith Busch if (shutdown) 2011302ad8ccSKeith Busch nvme_start_queues(&dev->ctrl); 201277bf25eaSKeith Busch mutex_unlock(&dev->shutdown_lock); 201357dacad5SJay Sternberg } 201457dacad5SJay Sternberg 201557dacad5SJay Sternberg static int nvme_setup_prp_pools(struct nvme_dev *dev) 201657dacad5SJay Sternberg { 201757dacad5SJay Sternberg dev->prp_page_pool = dma_pool_create("prp list page", dev->dev, 201857dacad5SJay Sternberg PAGE_SIZE, PAGE_SIZE, 0); 201957dacad5SJay Sternberg if (!dev->prp_page_pool) 202057dacad5SJay Sternberg return -ENOMEM; 202157dacad5SJay Sternberg 202257dacad5SJay Sternberg /* Optimisation for I/Os between 4k and 128k */ 202357dacad5SJay Sternberg dev->prp_small_pool = dma_pool_create("prp list 256", dev->dev, 202457dacad5SJay Sternberg 256, 256, 0); 202557dacad5SJay Sternberg if (!dev->prp_small_pool) { 202657dacad5SJay Sternberg dma_pool_destroy(dev->prp_page_pool); 202757dacad5SJay Sternberg return -ENOMEM; 202857dacad5SJay Sternberg } 202957dacad5SJay Sternberg return 0; 203057dacad5SJay Sternberg } 203157dacad5SJay Sternberg 203257dacad5SJay Sternberg static void nvme_release_prp_pools(struct nvme_dev *dev) 203357dacad5SJay Sternberg { 203457dacad5SJay Sternberg dma_pool_destroy(dev->prp_page_pool); 203557dacad5SJay Sternberg dma_pool_destroy(dev->prp_small_pool); 203657dacad5SJay Sternberg } 203757dacad5SJay Sternberg 20381673f1f0SChristoph Hellwig static void nvme_pci_free_ctrl(struct nvme_ctrl *ctrl) 203957dacad5SJay Sternberg { 20401673f1f0SChristoph Hellwig struct nvme_dev *dev = to_nvme_dev(ctrl); 204157dacad5SJay Sternberg 2042f9f38e33SHelen Koike nvme_dbbuf_dma_free(dev); 204357dacad5SJay Sternberg put_device(dev->dev); 204457dacad5SJay Sternberg if (dev->tagset.tags) 204557dacad5SJay Sternberg blk_mq_free_tag_set(&dev->tagset); 20461c63dc66SChristoph Hellwig if (dev->ctrl.admin_q) 20471c63dc66SChristoph Hellwig blk_put_queue(dev->ctrl.admin_q); 204857dacad5SJay Sternberg kfree(dev->queues); 2049e286bcfcSScott Bauer free_opal_dev(dev->ctrl.opal_dev); 205057dacad5SJay Sternberg kfree(dev); 205157dacad5SJay Sternberg } 205257dacad5SJay Sternberg 2053f58944e2SKeith Busch static void nvme_remove_dead_ctrl(struct nvme_dev *dev, int status) 2054f58944e2SKeith Busch { 2055237045fcSLinus Torvalds dev_warn(dev->ctrl.device, "Removing after probe failure status: %d\n", status); 2056f58944e2SKeith Busch 2057f58944e2SKeith Busch kref_get(&dev->ctrl.kref); 205869d9a99cSKeith Busch nvme_dev_disable(dev, false); 2059f58944e2SKeith Busch if (!schedule_work(&dev->remove_work)) 2060f58944e2SKeith Busch nvme_put_ctrl(&dev->ctrl); 2061f58944e2SKeith Busch } 2062f58944e2SKeith Busch 2063fd634f41SChristoph Hellwig static void nvme_reset_work(struct work_struct *work) 206457dacad5SJay Sternberg { 2065d86c4d8eSChristoph Hellwig struct nvme_dev *dev = 2066d86c4d8eSChristoph Hellwig container_of(work, struct nvme_dev, ctrl.reset_work); 2067a98e58e5SScott Bauer bool was_suspend = !!(dev->ctrl.ctrl_config & NVME_CC_SHN_NORMAL); 2068f58944e2SKeith Busch int result = -ENODEV; 206957dacad5SJay Sternberg 207082b057caSRakesh Pandit if (WARN_ON(dev->ctrl.state != NVME_CTRL_RESETTING)) 2071fd634f41SChristoph Hellwig goto out; 2072fd634f41SChristoph Hellwig 2073fd634f41SChristoph Hellwig /* 2074fd634f41SChristoph Hellwig * If we're called to reset a live controller first shut it down before 2075fd634f41SChristoph Hellwig * moving on. 2076fd634f41SChristoph Hellwig */ 2077b00a726aSKeith Busch if (dev->ctrl.ctrl_config & NVME_CC_ENABLE) 2078a5cdb68cSKeith Busch nvme_dev_disable(dev, false); 2079fd634f41SChristoph Hellwig 2080b00a726aSKeith Busch result = nvme_pci_enable(dev); 208157dacad5SJay Sternberg if (result) 208257dacad5SJay Sternberg goto out; 208357dacad5SJay Sternberg 208457dacad5SJay Sternberg result = nvme_configure_admin_queue(dev); 208557dacad5SJay Sternberg if (result) 2086f58944e2SKeith Busch goto out; 208757dacad5SJay Sternberg 208857dacad5SJay Sternberg nvme_init_queue(dev->queues[0], 0); 208957dacad5SJay Sternberg result = nvme_alloc_admin_tags(dev); 209057dacad5SJay Sternberg if (result) 2091f58944e2SKeith Busch goto out; 209257dacad5SJay Sternberg 2093ce4541f4SChristoph Hellwig result = nvme_init_identify(&dev->ctrl); 2094ce4541f4SChristoph Hellwig if (result) 2095f58944e2SKeith Busch goto out; 2096ce4541f4SChristoph Hellwig 2097e286bcfcSScott Bauer if (dev->ctrl.oacs & NVME_CTRL_OACS_SEC_SUPP) { 2098e286bcfcSScott Bauer if (!dev->ctrl.opal_dev) 20994f1244c8SChristoph Hellwig dev->ctrl.opal_dev = 21004f1244c8SChristoph Hellwig init_opal_dev(&dev->ctrl, &nvme_sec_submit); 2101e286bcfcSScott Bauer else if (was_suspend) 21024f1244c8SChristoph Hellwig opal_unlock_from_suspend(dev->ctrl.opal_dev); 2103e286bcfcSScott Bauer } else { 2104e286bcfcSScott Bauer free_opal_dev(dev->ctrl.opal_dev); 2105e286bcfcSScott Bauer dev->ctrl.opal_dev = NULL; 2106e286bcfcSScott Bauer } 2107a98e58e5SScott Bauer 2108f9f38e33SHelen Koike if (dev->ctrl.oacs & NVME_CTRL_OACS_DBBUF_SUPP) { 2109f9f38e33SHelen Koike result = nvme_dbbuf_dma_alloc(dev); 2110f9f38e33SHelen Koike if (result) 2111f9f38e33SHelen Koike dev_warn(dev->dev, 2112f9f38e33SHelen Koike "unable to allocate dma for dbbuf\n"); 2113f9f38e33SHelen Koike } 2114f9f38e33SHelen Koike 211587ad72a5SChristoph Hellwig if (dev->ctrl.hmpre) 211687ad72a5SChristoph Hellwig nvme_setup_host_mem(dev); 211787ad72a5SChristoph Hellwig 211857dacad5SJay Sternberg result = nvme_setup_io_queues(dev); 211957dacad5SJay Sternberg if (result) 2120f58944e2SKeith Busch goto out; 212157dacad5SJay Sternberg 212221f033f7SKeith Busch /* 212321f033f7SKeith Busch * A controller that can not execute IO typically requires user 212421f033f7SKeith Busch * intervention to correct. For such degraded controllers, the driver 212521f033f7SKeith Busch * should not submit commands the user did not request, so skip 212621f033f7SKeith Busch * registering for asynchronous event notification on this condition. 212721f033f7SKeith Busch */ 2128f866fc42SChristoph Hellwig if (dev->online_queues > 1) 2129f866fc42SChristoph Hellwig nvme_queue_async_events(&dev->ctrl); 213057dacad5SJay Sternberg 213157dacad5SJay Sternberg /* 213257dacad5SJay Sternberg * Keep the controller around but remove all namespaces if we don't have 213357dacad5SJay Sternberg * any working I/O queue. 213457dacad5SJay Sternberg */ 213557dacad5SJay Sternberg if (dev->online_queues < 2) { 21361b3c47c1SSagi Grimberg dev_warn(dev->ctrl.device, "IO queues not created\n"); 21373b24774eSKeith Busch nvme_kill_queues(&dev->ctrl); 21385bae7f73SChristoph Hellwig nvme_remove_namespaces(&dev->ctrl); 213957dacad5SJay Sternberg } else { 214025646264SKeith Busch nvme_start_queues(&dev->ctrl); 2141302ad8ccSKeith Busch nvme_wait_freeze(&dev->ctrl); 214257dacad5SJay Sternberg nvme_dev_add(dev); 2143302ad8ccSKeith Busch nvme_unfreeze(&dev->ctrl); 214457dacad5SJay Sternberg } 214557dacad5SJay Sternberg 2146bb8d261eSChristoph Hellwig if (!nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_LIVE)) { 2147bb8d261eSChristoph Hellwig dev_warn(dev->ctrl.device, "failed to mark controller live\n"); 2148bb8d261eSChristoph Hellwig goto out; 2149bb8d261eSChristoph Hellwig } 215092911a55SChristoph Hellwig 215192911a55SChristoph Hellwig if (dev->online_queues > 1) 21525955be21SChristoph Hellwig nvme_queue_scan(&dev->ctrl); 215357dacad5SJay Sternberg return; 215457dacad5SJay Sternberg 215557dacad5SJay Sternberg out: 2156f58944e2SKeith Busch nvme_remove_dead_ctrl(dev, result); 215757dacad5SJay Sternberg } 215857dacad5SJay Sternberg 21595c8809e6SChristoph Hellwig static void nvme_remove_dead_ctrl_work(struct work_struct *work) 216057dacad5SJay Sternberg { 21615c8809e6SChristoph Hellwig struct nvme_dev *dev = container_of(work, struct nvme_dev, remove_work); 216257dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 216357dacad5SJay Sternberg 216469d9a99cSKeith Busch nvme_kill_queues(&dev->ctrl); 216557dacad5SJay Sternberg if (pci_get_drvdata(pdev)) 2166921920abSKeith Busch device_release_driver(&pdev->dev); 21671673f1f0SChristoph Hellwig nvme_put_ctrl(&dev->ctrl); 216857dacad5SJay Sternberg } 216957dacad5SJay Sternberg 21701c63dc66SChristoph Hellwig static int nvme_pci_reg_read32(struct nvme_ctrl *ctrl, u32 off, u32 *val) 217157dacad5SJay Sternberg { 21721c63dc66SChristoph Hellwig *val = readl(to_nvme_dev(ctrl)->bar + off); 21731c63dc66SChristoph Hellwig return 0; 217457dacad5SJay Sternberg } 21751c63dc66SChristoph Hellwig 21765fd4ce1bSChristoph Hellwig static int nvme_pci_reg_write32(struct nvme_ctrl *ctrl, u32 off, u32 val) 21775fd4ce1bSChristoph Hellwig { 21785fd4ce1bSChristoph Hellwig writel(val, to_nvme_dev(ctrl)->bar + off); 21795fd4ce1bSChristoph Hellwig return 0; 21805fd4ce1bSChristoph Hellwig } 21815fd4ce1bSChristoph Hellwig 21827fd8930fSChristoph Hellwig static int nvme_pci_reg_read64(struct nvme_ctrl *ctrl, u32 off, u64 *val) 21837fd8930fSChristoph Hellwig { 21847fd8930fSChristoph Hellwig *val = readq(to_nvme_dev(ctrl)->bar + off); 21857fd8930fSChristoph Hellwig return 0; 21867fd8930fSChristoph Hellwig } 21877fd8930fSChristoph Hellwig 21881c63dc66SChristoph Hellwig static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = { 21891a353d85SMing Lin .name = "pcie", 2190e439bb12SSagi Grimberg .module = THIS_MODULE, 2191c81bfba9SChristoph Hellwig .flags = NVME_F_METADATA_SUPPORTED, 21921c63dc66SChristoph Hellwig .reg_read32 = nvme_pci_reg_read32, 21935fd4ce1bSChristoph Hellwig .reg_write32 = nvme_pci_reg_write32, 21947fd8930fSChristoph Hellwig .reg_read64 = nvme_pci_reg_read64, 21951673f1f0SChristoph Hellwig .free_ctrl = nvme_pci_free_ctrl, 2196f866fc42SChristoph Hellwig .submit_async_event = nvme_pci_submit_async_event, 21971c63dc66SChristoph Hellwig }; 219857dacad5SJay Sternberg 2199b00a726aSKeith Busch static int nvme_dev_map(struct nvme_dev *dev) 2200b00a726aSKeith Busch { 2201b00a726aSKeith Busch struct pci_dev *pdev = to_pci_dev(dev->dev); 2202b00a726aSKeith Busch 2203a1f447b3SJohannes Thumshirn if (pci_request_mem_regions(pdev, "nvme")) 2204b00a726aSKeith Busch return -ENODEV; 2205b00a726aSKeith Busch 220697f6ef64SXu Yu if (nvme_remap_bar(dev, NVME_REG_DBS + 4096)) 2207b00a726aSKeith Busch goto release; 2208b00a726aSKeith Busch 2209b00a726aSKeith Busch return 0; 2210b00a726aSKeith Busch release: 2211a1f447b3SJohannes Thumshirn pci_release_mem_regions(pdev); 2212b00a726aSKeith Busch return -ENODEV; 2213b00a726aSKeith Busch } 2214b00a726aSKeith Busch 2215ff5350a8SAndy Lutomirski static unsigned long check_dell_samsung_bug(struct pci_dev *pdev) 2216ff5350a8SAndy Lutomirski { 2217ff5350a8SAndy Lutomirski if (pdev->vendor == 0x144d && pdev->device == 0xa802) { 2218ff5350a8SAndy Lutomirski /* 2219ff5350a8SAndy Lutomirski * Several Samsung devices seem to drop off the PCIe bus 2220ff5350a8SAndy Lutomirski * randomly when APST is on and uses the deepest sleep state. 2221ff5350a8SAndy Lutomirski * This has been observed on a Samsung "SM951 NVMe SAMSUNG 2222ff5350a8SAndy Lutomirski * 256GB", a "PM951 NVMe SAMSUNG 512GB", and a "Samsung SSD 2223ff5350a8SAndy Lutomirski * 950 PRO 256GB", but it seems to be restricted to two Dell 2224ff5350a8SAndy Lutomirski * laptops. 2225ff5350a8SAndy Lutomirski */ 2226ff5350a8SAndy Lutomirski if (dmi_match(DMI_SYS_VENDOR, "Dell Inc.") && 2227ff5350a8SAndy Lutomirski (dmi_match(DMI_PRODUCT_NAME, "XPS 15 9550") || 2228ff5350a8SAndy Lutomirski dmi_match(DMI_PRODUCT_NAME, "Precision 5510"))) 2229ff5350a8SAndy Lutomirski return NVME_QUIRK_NO_DEEPEST_PS; 2230ff5350a8SAndy Lutomirski } 2231ff5350a8SAndy Lutomirski 2232ff5350a8SAndy Lutomirski return 0; 2233ff5350a8SAndy Lutomirski } 2234ff5350a8SAndy Lutomirski 223557dacad5SJay Sternberg static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) 223657dacad5SJay Sternberg { 223757dacad5SJay Sternberg int node, result = -ENOMEM; 223857dacad5SJay Sternberg struct nvme_dev *dev; 2239ff5350a8SAndy Lutomirski unsigned long quirks = id->driver_data; 224057dacad5SJay Sternberg 224157dacad5SJay Sternberg node = dev_to_node(&pdev->dev); 224257dacad5SJay Sternberg if (node == NUMA_NO_NODE) 22432fa84351SMasayoshi Mizuma set_dev_node(&pdev->dev, first_memory_node); 224457dacad5SJay Sternberg 224557dacad5SJay Sternberg dev = kzalloc_node(sizeof(*dev), GFP_KERNEL, node); 224657dacad5SJay Sternberg if (!dev) 224757dacad5SJay Sternberg return -ENOMEM; 224857dacad5SJay Sternberg dev->queues = kzalloc_node((num_possible_cpus() + 1) * sizeof(void *), 224957dacad5SJay Sternberg GFP_KERNEL, node); 225057dacad5SJay Sternberg if (!dev->queues) 225157dacad5SJay Sternberg goto free; 225257dacad5SJay Sternberg 225357dacad5SJay Sternberg dev->dev = get_device(&pdev->dev); 225457dacad5SJay Sternberg pci_set_drvdata(pdev, dev); 225557dacad5SJay Sternberg 2256b00a726aSKeith Busch result = nvme_dev_map(dev); 2257b00a726aSKeith Busch if (result) 2258b00a726aSKeith Busch goto free; 2259b00a726aSKeith Busch 2260d86c4d8eSChristoph Hellwig INIT_WORK(&dev->ctrl.reset_work, nvme_reset_work); 22615c8809e6SChristoph Hellwig INIT_WORK(&dev->remove_work, nvme_remove_dead_ctrl_work); 226277bf25eaSKeith Busch mutex_init(&dev->shutdown_lock); 2263db3cbfffSKeith Busch init_completion(&dev->ioq_wait); 2264f3ca80fcSChristoph Hellwig 2265f3ca80fcSChristoph Hellwig result = nvme_setup_prp_pools(dev); 2266f3ca80fcSChristoph Hellwig if (result) 2267f3ca80fcSChristoph Hellwig goto put_pci; 2268f3ca80fcSChristoph Hellwig 2269ff5350a8SAndy Lutomirski quirks |= check_dell_samsung_bug(pdev); 2270ff5350a8SAndy Lutomirski 2271f3ca80fcSChristoph Hellwig result = nvme_init_ctrl(&dev->ctrl, &pdev->dev, &nvme_pci_ctrl_ops, 2272ff5350a8SAndy Lutomirski quirks); 2273f3ca80fcSChristoph Hellwig if (result) 2274f3ca80fcSChristoph Hellwig goto release_pools; 2275f3ca80fcSChristoph Hellwig 227682b057caSRakesh Pandit nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_RESETTING); 22771b3c47c1SSagi Grimberg dev_info(dev->ctrl.device, "pci function %s\n", dev_name(&pdev->dev)); 22781b3c47c1SSagi Grimberg 2279d86c4d8eSChristoph Hellwig queue_work(nvme_wq, &dev->ctrl.reset_work); 228057dacad5SJay Sternberg return 0; 228157dacad5SJay Sternberg 228257dacad5SJay Sternberg release_pools: 228357dacad5SJay Sternberg nvme_release_prp_pools(dev); 228457dacad5SJay Sternberg put_pci: 228557dacad5SJay Sternberg put_device(dev->dev); 2286b00a726aSKeith Busch nvme_dev_unmap(dev); 228757dacad5SJay Sternberg free: 228857dacad5SJay Sternberg kfree(dev->queues); 228957dacad5SJay Sternberg kfree(dev); 229057dacad5SJay Sternberg return result; 229157dacad5SJay Sternberg } 229257dacad5SJay Sternberg 229357dacad5SJay Sternberg static void nvme_reset_notify(struct pci_dev *pdev, bool prepare) 229457dacad5SJay Sternberg { 229557dacad5SJay Sternberg struct nvme_dev *dev = pci_get_drvdata(pdev); 229657dacad5SJay Sternberg 229757dacad5SJay Sternberg if (prepare) 2298a5cdb68cSKeith Busch nvme_dev_disable(dev, false); 229957dacad5SJay Sternberg else 2300d86c4d8eSChristoph Hellwig nvme_reset_ctrl(&dev->ctrl); 230157dacad5SJay Sternberg } 230257dacad5SJay Sternberg 230357dacad5SJay Sternberg static void nvme_shutdown(struct pci_dev *pdev) 230457dacad5SJay Sternberg { 230557dacad5SJay Sternberg struct nvme_dev *dev = pci_get_drvdata(pdev); 2306a5cdb68cSKeith Busch nvme_dev_disable(dev, true); 230757dacad5SJay Sternberg } 230857dacad5SJay Sternberg 2309f58944e2SKeith Busch /* 2310f58944e2SKeith Busch * The driver's remove may be called on a device in a partially initialized 2311f58944e2SKeith Busch * state. This function must not have any dependencies on the device state in 2312f58944e2SKeith Busch * order to proceed. 2313f58944e2SKeith Busch */ 231457dacad5SJay Sternberg static void nvme_remove(struct pci_dev *pdev) 231557dacad5SJay Sternberg { 231657dacad5SJay Sternberg struct nvme_dev *dev = pci_get_drvdata(pdev); 231757dacad5SJay Sternberg 2318bb8d261eSChristoph Hellwig nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_DELETING); 2319bb8d261eSChristoph Hellwig 2320d86c4d8eSChristoph Hellwig cancel_work_sync(&dev->ctrl.reset_work); 232157dacad5SJay Sternberg pci_set_drvdata(pdev, NULL); 23220ff9d4e1SKeith Busch 23236db28edaSKeith Busch if (!pci_device_is_present(pdev)) { 23240ff9d4e1SKeith Busch nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_DEAD); 23256db28edaSKeith Busch nvme_dev_disable(dev, false); 23266db28edaSKeith Busch } 23270ff9d4e1SKeith Busch 2328d86c4d8eSChristoph Hellwig flush_work(&dev->ctrl.reset_work); 232953029b04SKeith Busch nvme_uninit_ctrl(&dev->ctrl); 2330a5cdb68cSKeith Busch nvme_dev_disable(dev, true); 233187ad72a5SChristoph Hellwig nvme_free_host_mem(dev); 233257dacad5SJay Sternberg nvme_dev_remove_admin(dev); 233357dacad5SJay Sternberg nvme_free_queues(dev, 0); 233457dacad5SJay Sternberg nvme_release_prp_pools(dev); 2335b00a726aSKeith Busch nvme_dev_unmap(dev); 23361673f1f0SChristoph Hellwig nvme_put_ctrl(&dev->ctrl); 233757dacad5SJay Sternberg } 233857dacad5SJay Sternberg 233913880f5bSKeith Busch static int nvme_pci_sriov_configure(struct pci_dev *pdev, int numvfs) 234013880f5bSKeith Busch { 234113880f5bSKeith Busch int ret = 0; 234213880f5bSKeith Busch 234313880f5bSKeith Busch if (numvfs == 0) { 234413880f5bSKeith Busch if (pci_vfs_assigned(pdev)) { 234513880f5bSKeith Busch dev_warn(&pdev->dev, 234613880f5bSKeith Busch "Cannot disable SR-IOV VFs while assigned\n"); 234713880f5bSKeith Busch return -EPERM; 234813880f5bSKeith Busch } 234913880f5bSKeith Busch pci_disable_sriov(pdev); 235013880f5bSKeith Busch return 0; 235113880f5bSKeith Busch } 235213880f5bSKeith Busch 235313880f5bSKeith Busch ret = pci_enable_sriov(pdev, numvfs); 235413880f5bSKeith Busch return ret ? ret : numvfs; 235513880f5bSKeith Busch } 235613880f5bSKeith Busch 235757dacad5SJay Sternberg #ifdef CONFIG_PM_SLEEP 235857dacad5SJay Sternberg static int nvme_suspend(struct device *dev) 235957dacad5SJay Sternberg { 236057dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev); 236157dacad5SJay Sternberg struct nvme_dev *ndev = pci_get_drvdata(pdev); 236257dacad5SJay Sternberg 2363a5cdb68cSKeith Busch nvme_dev_disable(ndev, true); 236457dacad5SJay Sternberg return 0; 236557dacad5SJay Sternberg } 236657dacad5SJay Sternberg 236757dacad5SJay Sternberg static int nvme_resume(struct device *dev) 236857dacad5SJay Sternberg { 236957dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev); 237057dacad5SJay Sternberg struct nvme_dev *ndev = pci_get_drvdata(pdev); 237157dacad5SJay Sternberg 2372d86c4d8eSChristoph Hellwig nvme_reset_ctrl(&ndev->ctrl); 237357dacad5SJay Sternberg return 0; 237457dacad5SJay Sternberg } 237557dacad5SJay Sternberg #endif 237657dacad5SJay Sternberg 237757dacad5SJay Sternberg static SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume); 237857dacad5SJay Sternberg 2379a0a3408eSKeith Busch static pci_ers_result_t nvme_error_detected(struct pci_dev *pdev, 2380a0a3408eSKeith Busch pci_channel_state_t state) 2381a0a3408eSKeith Busch { 2382a0a3408eSKeith Busch struct nvme_dev *dev = pci_get_drvdata(pdev); 2383a0a3408eSKeith Busch 2384a0a3408eSKeith Busch /* 2385a0a3408eSKeith Busch * A frozen channel requires a reset. When detected, this method will 2386a0a3408eSKeith Busch * shutdown the controller to quiesce. The controller will be restarted 2387a0a3408eSKeith Busch * after the slot reset through driver's slot_reset callback. 2388a0a3408eSKeith Busch */ 2389a0a3408eSKeith Busch switch (state) { 2390a0a3408eSKeith Busch case pci_channel_io_normal: 2391a0a3408eSKeith Busch return PCI_ERS_RESULT_CAN_RECOVER; 2392a0a3408eSKeith Busch case pci_channel_io_frozen: 2393d011fb31SKeith Busch dev_warn(dev->ctrl.device, 2394d011fb31SKeith Busch "frozen state error detected, reset controller\n"); 2395a5cdb68cSKeith Busch nvme_dev_disable(dev, false); 2396a0a3408eSKeith Busch return PCI_ERS_RESULT_NEED_RESET; 2397a0a3408eSKeith Busch case pci_channel_io_perm_failure: 2398d011fb31SKeith Busch dev_warn(dev->ctrl.device, 2399d011fb31SKeith Busch "failure state error detected, request disconnect\n"); 2400a0a3408eSKeith Busch return PCI_ERS_RESULT_DISCONNECT; 2401a0a3408eSKeith Busch } 2402a0a3408eSKeith Busch return PCI_ERS_RESULT_NEED_RESET; 2403a0a3408eSKeith Busch } 2404a0a3408eSKeith Busch 2405a0a3408eSKeith Busch static pci_ers_result_t nvme_slot_reset(struct pci_dev *pdev) 2406a0a3408eSKeith Busch { 2407a0a3408eSKeith Busch struct nvme_dev *dev = pci_get_drvdata(pdev); 2408a0a3408eSKeith Busch 24091b3c47c1SSagi Grimberg dev_info(dev->ctrl.device, "restart after slot reset\n"); 2410a0a3408eSKeith Busch pci_restore_state(pdev); 2411d86c4d8eSChristoph Hellwig nvme_reset_ctrl(&dev->ctrl); 2412a0a3408eSKeith Busch return PCI_ERS_RESULT_RECOVERED; 2413a0a3408eSKeith Busch } 2414a0a3408eSKeith Busch 2415a0a3408eSKeith Busch static void nvme_error_resume(struct pci_dev *pdev) 2416a0a3408eSKeith Busch { 2417a0a3408eSKeith Busch pci_cleanup_aer_uncorrect_error_status(pdev); 2418a0a3408eSKeith Busch } 2419a0a3408eSKeith Busch 242057dacad5SJay Sternberg static const struct pci_error_handlers nvme_err_handler = { 242157dacad5SJay Sternberg .error_detected = nvme_error_detected, 242257dacad5SJay Sternberg .slot_reset = nvme_slot_reset, 242357dacad5SJay Sternberg .resume = nvme_error_resume, 242457dacad5SJay Sternberg .reset_notify = nvme_reset_notify, 242557dacad5SJay Sternberg }; 242657dacad5SJay Sternberg 242757dacad5SJay Sternberg static const struct pci_device_id nvme_id_table[] = { 2428106198edSChristoph Hellwig { PCI_VDEVICE(INTEL, 0x0953), 242908095e70SKeith Busch .driver_data = NVME_QUIRK_STRIPE_SIZE | 2430e850fd16SChristoph Hellwig NVME_QUIRK_DEALLOCATE_ZEROES, }, 243199466e70SKeith Busch { PCI_VDEVICE(INTEL, 0x0a53), 243299466e70SKeith Busch .driver_data = NVME_QUIRK_STRIPE_SIZE | 2433e850fd16SChristoph Hellwig NVME_QUIRK_DEALLOCATE_ZEROES, }, 243499466e70SKeith Busch { PCI_VDEVICE(INTEL, 0x0a54), 243599466e70SKeith Busch .driver_data = NVME_QUIRK_STRIPE_SIZE | 2436e850fd16SChristoph Hellwig NVME_QUIRK_DEALLOCATE_ZEROES, }, 243750af47d0SAndy Lutomirski { PCI_VDEVICE(INTEL, 0xf1a5), /* Intel 600P/P3100 */ 243850af47d0SAndy Lutomirski .driver_data = NVME_QUIRK_NO_DEEPEST_PS }, 2439540c801cSKeith Busch { PCI_VDEVICE(INTEL, 0x5845), /* Qemu emulated controller */ 2440540c801cSKeith Busch .driver_data = NVME_QUIRK_IDENTIFY_CNS, }, 244154adc010SGuilherme G. Piccoli { PCI_DEVICE(0x1c58, 0x0003), /* HGST adapter */ 244254adc010SGuilherme G. Piccoli .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, 2443015282c9SWenbo Wang { PCI_DEVICE(0x1c5f, 0x0540), /* Memblaze Pblaze4 adapter */ 2444015282c9SWenbo Wang .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, 244557dacad5SJay Sternberg { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 2446c74dc780SStephan Günther { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2001) }, 2447124298bdSDaniel Roschka { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2003) }, 244857dacad5SJay Sternberg { 0, } 244957dacad5SJay Sternberg }; 245057dacad5SJay Sternberg MODULE_DEVICE_TABLE(pci, nvme_id_table); 245157dacad5SJay Sternberg 245257dacad5SJay Sternberg static struct pci_driver nvme_driver = { 245357dacad5SJay Sternberg .name = "nvme", 245457dacad5SJay Sternberg .id_table = nvme_id_table, 245557dacad5SJay Sternberg .probe = nvme_probe, 245657dacad5SJay Sternberg .remove = nvme_remove, 245757dacad5SJay Sternberg .shutdown = nvme_shutdown, 245857dacad5SJay Sternberg .driver = { 245957dacad5SJay Sternberg .pm = &nvme_dev_pm_ops, 246057dacad5SJay Sternberg }, 246113880f5bSKeith Busch .sriov_configure = nvme_pci_sriov_configure, 246257dacad5SJay Sternberg .err_handler = &nvme_err_handler, 246357dacad5SJay Sternberg }; 246457dacad5SJay Sternberg 246557dacad5SJay Sternberg static int __init nvme_init(void) 246657dacad5SJay Sternberg { 24679a6327d2SSagi Grimberg return pci_register_driver(&nvme_driver); 246857dacad5SJay Sternberg } 246957dacad5SJay Sternberg 247057dacad5SJay Sternberg static void __exit nvme_exit(void) 247157dacad5SJay Sternberg { 247257dacad5SJay Sternberg pci_unregister_driver(&nvme_driver); 247357dacad5SJay Sternberg _nvme_check_size(); 247457dacad5SJay Sternberg } 247557dacad5SJay Sternberg 247657dacad5SJay Sternberg MODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 247757dacad5SJay Sternberg MODULE_LICENSE("GPL"); 247857dacad5SJay Sternberg MODULE_VERSION("1.0"); 247957dacad5SJay Sternberg module_init(nvme_init); 248057dacad5SJay Sternberg module_exit(nvme_exit); 2481