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> 1957dacad5SJay Sternberg #include <linux/cpu.h> 2057dacad5SJay Sternberg #include <linux/delay.h> 2157dacad5SJay Sternberg #include <linux/errno.h> 2257dacad5SJay Sternberg #include <linux/fs.h> 2357dacad5SJay Sternberg #include <linux/genhd.h> 2457dacad5SJay Sternberg #include <linux/hdreg.h> 2557dacad5SJay Sternberg #include <linux/idr.h> 2657dacad5SJay Sternberg #include <linux/init.h> 2757dacad5SJay Sternberg #include <linux/interrupt.h> 2857dacad5SJay Sternberg #include <linux/io.h> 2957dacad5SJay Sternberg #include <linux/kdev_t.h> 3057dacad5SJay Sternberg #include <linux/kthread.h> 3157dacad5SJay Sternberg #include <linux/kernel.h> 3257dacad5SJay Sternberg #include <linux/mm.h> 3357dacad5SJay Sternberg #include <linux/module.h> 3457dacad5SJay Sternberg #include <linux/moduleparam.h> 3577bf25eaSKeith Busch #include <linux/mutex.h> 3657dacad5SJay Sternberg #include <linux/pci.h> 3757dacad5SJay Sternberg #include <linux/poison.h> 3857dacad5SJay Sternberg #include <linux/ptrace.h> 3957dacad5SJay Sternberg #include <linux/sched.h> 4057dacad5SJay Sternberg #include <linux/slab.h> 4157dacad5SJay Sternberg #include <linux/t10-pi.h> 4257dacad5SJay Sternberg #include <linux/types.h> 439cf5c095SLinus Torvalds #include <linux/io-64-nonatomic-lo-hi.h> 441d277a63SKeith Busch #include <asm/unaligned.h> 4557dacad5SJay Sternberg 4657dacad5SJay Sternberg #include "nvme.h" 4757dacad5SJay Sternberg 4857dacad5SJay Sternberg #define NVME_Q_DEPTH 1024 4957dacad5SJay Sternberg #define NVME_AQ_DEPTH 256 5057dacad5SJay Sternberg #define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) 5157dacad5SJay Sternberg #define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) 5257dacad5SJay Sternberg 53adf68f21SChristoph Hellwig /* 54adf68f21SChristoph Hellwig * We handle AEN commands ourselves and don't even let the 55adf68f21SChristoph Hellwig * block layer know about them. 56adf68f21SChristoph Hellwig */ 57adf68f21SChristoph Hellwig #define NVME_NR_AEN_COMMANDS 1 58adf68f21SChristoph Hellwig #define NVME_AQ_BLKMQ_DEPTH (NVME_AQ_DEPTH - NVME_NR_AEN_COMMANDS) 59adf68f21SChristoph Hellwig 6021d34711SChristoph Hellwig unsigned char admin_timeout = 60; 6157dacad5SJay Sternberg module_param(admin_timeout, byte, 0644); 6257dacad5SJay Sternberg MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands"); 6357dacad5SJay Sternberg 6457dacad5SJay Sternberg unsigned char nvme_io_timeout = 30; 6557dacad5SJay Sternberg module_param_named(io_timeout, nvme_io_timeout, byte, 0644); 6657dacad5SJay Sternberg MODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O"); 6757dacad5SJay Sternberg 685fd4ce1bSChristoph Hellwig unsigned char shutdown_timeout = 5; 6957dacad5SJay Sternberg module_param(shutdown_timeout, byte, 0644); 7057dacad5SJay Sternberg MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown"); 7157dacad5SJay Sternberg 7257dacad5SJay Sternberg static int use_threaded_interrupts; 7357dacad5SJay Sternberg module_param(use_threaded_interrupts, int, 0); 7457dacad5SJay Sternberg 7557dacad5SJay Sternberg static bool use_cmb_sqes = true; 7657dacad5SJay Sternberg module_param(use_cmb_sqes, bool, 0644); 7757dacad5SJay Sternberg MODULE_PARM_DESC(use_cmb_sqes, "use controller's memory buffer for I/O SQes"); 7857dacad5SJay Sternberg 7957dacad5SJay Sternberg static LIST_HEAD(dev_list); 8057dacad5SJay Sternberg static struct task_struct *nvme_thread; 8157dacad5SJay Sternberg static struct workqueue_struct *nvme_workq; 8257dacad5SJay Sternberg static wait_queue_head_t nvme_kthread_wait; 8357dacad5SJay Sternberg 841c63dc66SChristoph Hellwig struct nvme_dev; 851c63dc66SChristoph Hellwig struct nvme_queue; 8657dacad5SJay Sternberg 8757dacad5SJay Sternberg static int nvme_reset(struct nvme_dev *dev); 88a0fa9647SJens Axboe static void nvme_process_cq(struct nvme_queue *nvmeq); 895c8809e6SChristoph Hellwig static void nvme_remove_dead_ctrl(struct nvme_dev *dev); 90a5cdb68cSKeith Busch static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown); 9157dacad5SJay Sternberg 9257dacad5SJay Sternberg /* 931c63dc66SChristoph Hellwig * Represents an NVM Express device. Each nvme_dev is a PCI function. 941c63dc66SChristoph Hellwig */ 951c63dc66SChristoph Hellwig struct nvme_dev { 961c63dc66SChristoph Hellwig struct list_head node; 971c63dc66SChristoph Hellwig struct nvme_queue **queues; 981c63dc66SChristoph Hellwig struct blk_mq_tag_set tagset; 991c63dc66SChristoph Hellwig struct blk_mq_tag_set admin_tagset; 1001c63dc66SChristoph Hellwig u32 __iomem *dbs; 1011c63dc66SChristoph Hellwig struct device *dev; 1021c63dc66SChristoph Hellwig struct dma_pool *prp_page_pool; 1031c63dc66SChristoph Hellwig struct dma_pool *prp_small_pool; 1041c63dc66SChristoph Hellwig unsigned queue_count; 1051c63dc66SChristoph Hellwig unsigned online_queues; 1061c63dc66SChristoph Hellwig unsigned max_qid; 1071c63dc66SChristoph Hellwig int q_depth; 1081c63dc66SChristoph Hellwig u32 db_stride; 1091c63dc66SChristoph Hellwig struct msix_entry *entry; 1101c63dc66SChristoph Hellwig void __iomem *bar; 1111c63dc66SChristoph Hellwig struct work_struct reset_work; 1121c63dc66SChristoph Hellwig struct work_struct scan_work; 1135c8809e6SChristoph Hellwig struct work_struct remove_work; 11477bf25eaSKeith Busch struct mutex shutdown_lock; 1151c63dc66SChristoph Hellwig bool subsystem; 1161c63dc66SChristoph Hellwig void __iomem *cmb; 1171c63dc66SChristoph Hellwig dma_addr_t cmb_dma_addr; 1181c63dc66SChristoph Hellwig u64 cmb_size; 1191c63dc66SChristoph Hellwig u32 cmbsz; 120fd634f41SChristoph Hellwig unsigned long flags; 121db3cbfffSKeith Busch 122fd634f41SChristoph Hellwig #define NVME_CTRL_RESETTING 0 1231c63dc66SChristoph Hellwig 1241c63dc66SChristoph Hellwig struct nvme_ctrl ctrl; 125db3cbfffSKeith Busch struct completion ioq_wait; 12657dacad5SJay Sternberg }; 12757dacad5SJay Sternberg 1281c63dc66SChristoph Hellwig static inline struct nvme_dev *to_nvme_dev(struct nvme_ctrl *ctrl) 1291c63dc66SChristoph Hellwig { 1301c63dc66SChristoph Hellwig return container_of(ctrl, struct nvme_dev, ctrl); 1311c63dc66SChristoph Hellwig } 1321c63dc66SChristoph Hellwig 13357dacad5SJay Sternberg /* 13457dacad5SJay Sternberg * An NVM Express queue. Each device has at least two (one for admin 13557dacad5SJay Sternberg * commands and one for I/O commands). 13657dacad5SJay Sternberg */ 13757dacad5SJay Sternberg struct nvme_queue { 13857dacad5SJay Sternberg struct device *q_dmadev; 13957dacad5SJay Sternberg struct nvme_dev *dev; 14057dacad5SJay Sternberg char irqname[24]; /* nvme4294967295-65535\0 */ 14157dacad5SJay Sternberg spinlock_t q_lock; 14257dacad5SJay Sternberg struct nvme_command *sq_cmds; 14357dacad5SJay Sternberg struct nvme_command __iomem *sq_cmds_io; 14457dacad5SJay Sternberg volatile struct nvme_completion *cqes; 14557dacad5SJay Sternberg struct blk_mq_tags **tags; 14657dacad5SJay Sternberg dma_addr_t sq_dma_addr; 14757dacad5SJay Sternberg dma_addr_t cq_dma_addr; 14857dacad5SJay Sternberg u32 __iomem *q_db; 14957dacad5SJay Sternberg u16 q_depth; 15057dacad5SJay Sternberg s16 cq_vector; 15157dacad5SJay Sternberg u16 sq_head; 15257dacad5SJay Sternberg u16 sq_tail; 15357dacad5SJay Sternberg u16 cq_head; 15457dacad5SJay Sternberg u16 qid; 15557dacad5SJay Sternberg u8 cq_phase; 15657dacad5SJay Sternberg u8 cqe_seen; 15757dacad5SJay Sternberg }; 15857dacad5SJay Sternberg 15957dacad5SJay Sternberg /* 16071bd150cSChristoph Hellwig * The nvme_iod describes the data in an I/O, including the list of PRP 16171bd150cSChristoph Hellwig * entries. You can't see it in this data structure because C doesn't let 162f4800d6dSChristoph Hellwig * me express that. Use nvme_init_iod to ensure there's enough space 16371bd150cSChristoph Hellwig * allocated to store the PRP list. 16471bd150cSChristoph Hellwig */ 16571bd150cSChristoph Hellwig struct nvme_iod { 166f4800d6dSChristoph Hellwig struct nvme_queue *nvmeq; 167f4800d6dSChristoph Hellwig int aborted; 16871bd150cSChristoph Hellwig int npages; /* In the PRP list. 0 means small pool in use */ 16971bd150cSChristoph Hellwig int nents; /* Used in scatterlist */ 17071bd150cSChristoph Hellwig int length; /* Of data, in bytes */ 17171bd150cSChristoph Hellwig dma_addr_t first_dma; 172bf684057SChristoph Hellwig struct scatterlist meta_sg; /* metadata requires single contiguous buffer */ 173f4800d6dSChristoph Hellwig struct scatterlist *sg; 174f4800d6dSChristoph Hellwig struct scatterlist inline_sg[0]; 17557dacad5SJay Sternberg }; 17657dacad5SJay Sternberg 17757dacad5SJay Sternberg /* 17857dacad5SJay Sternberg * Check we didin't inadvertently grow the command struct 17957dacad5SJay Sternberg */ 18057dacad5SJay Sternberg static inline void _nvme_check_size(void) 18157dacad5SJay Sternberg { 18257dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); 18357dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); 18457dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); 18557dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); 18657dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_features) != 64); 18757dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); 18857dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); 18957dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_command) != 64); 19057dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); 19157dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); 19257dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); 19357dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); 19457dacad5SJay Sternberg } 19557dacad5SJay Sternberg 19657dacad5SJay Sternberg /* 19757dacad5SJay Sternberg * Max size of iod being embedded in the request payload 19857dacad5SJay Sternberg */ 19957dacad5SJay Sternberg #define NVME_INT_PAGES 2 2005fd4ce1bSChristoph Hellwig #define NVME_INT_BYTES(dev) (NVME_INT_PAGES * (dev)->ctrl.page_size) 20157dacad5SJay Sternberg 20257dacad5SJay Sternberg /* 20357dacad5SJay Sternberg * Will slightly overestimate the number of pages needed. This is OK 20457dacad5SJay Sternberg * as it only leads to a small amount of wasted memory for the lifetime of 20557dacad5SJay Sternberg * the I/O. 20657dacad5SJay Sternberg */ 20757dacad5SJay Sternberg static int nvme_npages(unsigned size, struct nvme_dev *dev) 20857dacad5SJay Sternberg { 2095fd4ce1bSChristoph Hellwig unsigned nprps = DIV_ROUND_UP(size + dev->ctrl.page_size, 2105fd4ce1bSChristoph Hellwig dev->ctrl.page_size); 21157dacad5SJay Sternberg return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); 21257dacad5SJay Sternberg } 21357dacad5SJay Sternberg 214f4800d6dSChristoph Hellwig static unsigned int nvme_iod_alloc_size(struct nvme_dev *dev, 215f4800d6dSChristoph Hellwig unsigned int size, unsigned int nseg) 216f4800d6dSChristoph Hellwig { 217f4800d6dSChristoph Hellwig return sizeof(__le64 *) * nvme_npages(size, dev) + 218f4800d6dSChristoph Hellwig sizeof(struct scatterlist) * nseg; 219f4800d6dSChristoph Hellwig } 220f4800d6dSChristoph Hellwig 22157dacad5SJay Sternberg static unsigned int nvme_cmd_size(struct nvme_dev *dev) 22257dacad5SJay Sternberg { 223f4800d6dSChristoph Hellwig return sizeof(struct nvme_iod) + 224f4800d6dSChristoph Hellwig nvme_iod_alloc_size(dev, NVME_INT_BYTES(dev), NVME_INT_PAGES); 22557dacad5SJay Sternberg } 22657dacad5SJay Sternberg 22757dacad5SJay Sternberg static int nvme_admin_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 22857dacad5SJay Sternberg unsigned int hctx_idx) 22957dacad5SJay Sternberg { 23057dacad5SJay Sternberg struct nvme_dev *dev = data; 23157dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[0]; 23257dacad5SJay Sternberg 23357dacad5SJay Sternberg WARN_ON(hctx_idx != 0); 23457dacad5SJay Sternberg WARN_ON(dev->admin_tagset.tags[0] != hctx->tags); 23557dacad5SJay Sternberg WARN_ON(nvmeq->tags); 23657dacad5SJay Sternberg 23757dacad5SJay Sternberg hctx->driver_data = nvmeq; 23857dacad5SJay Sternberg nvmeq->tags = &dev->admin_tagset.tags[0]; 23957dacad5SJay Sternberg return 0; 24057dacad5SJay Sternberg } 24157dacad5SJay Sternberg 24257dacad5SJay Sternberg static void nvme_admin_exit_hctx(struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx) 24357dacad5SJay Sternberg { 24457dacad5SJay Sternberg struct nvme_queue *nvmeq = hctx->driver_data; 24557dacad5SJay Sternberg 24657dacad5SJay Sternberg nvmeq->tags = NULL; 24757dacad5SJay Sternberg } 24857dacad5SJay Sternberg 24957dacad5SJay Sternberg static int nvme_admin_init_request(void *data, struct request *req, 25057dacad5SJay Sternberg unsigned int hctx_idx, unsigned int rq_idx, 25157dacad5SJay Sternberg unsigned int numa_node) 25257dacad5SJay Sternberg { 25357dacad5SJay Sternberg struct nvme_dev *dev = data; 254f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 25557dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[0]; 25657dacad5SJay Sternberg 25757dacad5SJay Sternberg BUG_ON(!nvmeq); 258f4800d6dSChristoph Hellwig iod->nvmeq = nvmeq; 25957dacad5SJay Sternberg return 0; 26057dacad5SJay Sternberg } 26157dacad5SJay Sternberg 26257dacad5SJay Sternberg static int nvme_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 26357dacad5SJay Sternberg unsigned int hctx_idx) 26457dacad5SJay Sternberg { 26557dacad5SJay Sternberg struct nvme_dev *dev = data; 26657dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; 26757dacad5SJay Sternberg 26857dacad5SJay Sternberg if (!nvmeq->tags) 26957dacad5SJay Sternberg nvmeq->tags = &dev->tagset.tags[hctx_idx]; 27057dacad5SJay Sternberg 27157dacad5SJay Sternberg WARN_ON(dev->tagset.tags[hctx_idx] != hctx->tags); 27257dacad5SJay Sternberg hctx->driver_data = nvmeq; 27357dacad5SJay Sternberg return 0; 27457dacad5SJay Sternberg } 27557dacad5SJay Sternberg 27657dacad5SJay Sternberg static int nvme_init_request(void *data, struct request *req, 27757dacad5SJay Sternberg unsigned int hctx_idx, unsigned int rq_idx, 27857dacad5SJay Sternberg unsigned int numa_node) 27957dacad5SJay Sternberg { 28057dacad5SJay Sternberg struct nvme_dev *dev = data; 281f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 28257dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; 28357dacad5SJay Sternberg 28457dacad5SJay Sternberg BUG_ON(!nvmeq); 285f4800d6dSChristoph Hellwig iod->nvmeq = nvmeq; 28657dacad5SJay Sternberg return 0; 28757dacad5SJay Sternberg } 28857dacad5SJay Sternberg 289adf68f21SChristoph Hellwig static void nvme_complete_async_event(struct nvme_dev *dev, 29057dacad5SJay Sternberg struct nvme_completion *cqe) 29157dacad5SJay Sternberg { 292adf68f21SChristoph Hellwig u16 status = le16_to_cpu(cqe->status) >> 1; 293adf68f21SChristoph Hellwig u32 result = le32_to_cpu(cqe->result); 29457dacad5SJay Sternberg 29557dacad5SJay Sternberg if (status == NVME_SC_SUCCESS || status == NVME_SC_ABORT_REQ) 296adf68f21SChristoph Hellwig ++dev->ctrl.event_limit; 29757dacad5SJay Sternberg if (status != NVME_SC_SUCCESS) 29857dacad5SJay Sternberg return; 29957dacad5SJay Sternberg 30057dacad5SJay Sternberg switch (result & 0xff07) { 30157dacad5SJay Sternberg case NVME_AER_NOTICE_NS_CHANGED: 302adf68f21SChristoph Hellwig dev_info(dev->dev, "rescanning\n"); 303adf68f21SChristoph Hellwig queue_work(nvme_workq, &dev->scan_work); 30457dacad5SJay Sternberg default: 305adf68f21SChristoph Hellwig dev_warn(dev->dev, "async event result %08x\n", result); 30657dacad5SJay Sternberg } 30757dacad5SJay Sternberg } 30857dacad5SJay Sternberg 30957dacad5SJay Sternberg /** 310adf68f21SChristoph Hellwig * __nvme_submit_cmd() - Copy a command into a queue and ring the doorbell 31157dacad5SJay Sternberg * @nvmeq: The queue to use 31257dacad5SJay Sternberg * @cmd: The command to send 31357dacad5SJay Sternberg * 31457dacad5SJay Sternberg * Safe to use from interrupt context 31557dacad5SJay Sternberg */ 31657dacad5SJay Sternberg static void __nvme_submit_cmd(struct nvme_queue *nvmeq, 31757dacad5SJay Sternberg struct nvme_command *cmd) 31857dacad5SJay Sternberg { 31957dacad5SJay Sternberg u16 tail = nvmeq->sq_tail; 32057dacad5SJay Sternberg 32157dacad5SJay Sternberg if (nvmeq->sq_cmds_io) 32257dacad5SJay Sternberg memcpy_toio(&nvmeq->sq_cmds_io[tail], cmd, sizeof(*cmd)); 32357dacad5SJay Sternberg else 32457dacad5SJay Sternberg memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); 32557dacad5SJay Sternberg 32657dacad5SJay Sternberg if (++tail == nvmeq->q_depth) 32757dacad5SJay Sternberg tail = 0; 32857dacad5SJay Sternberg writel(tail, nvmeq->q_db); 32957dacad5SJay Sternberg nvmeq->sq_tail = tail; 33057dacad5SJay Sternberg } 33157dacad5SJay Sternberg 332f4800d6dSChristoph Hellwig static __le64 **iod_list(struct request *req) 33357dacad5SJay Sternberg { 334f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 335f4800d6dSChristoph Hellwig return (__le64 **)(iod->sg + req->nr_phys_segments); 33657dacad5SJay Sternberg } 33757dacad5SJay Sternberg 338f4800d6dSChristoph Hellwig static int nvme_init_iod(struct request *rq, struct nvme_dev *dev) 33957dacad5SJay Sternberg { 340f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(rq); 341f4800d6dSChristoph Hellwig int nseg = rq->nr_phys_segments; 342f4800d6dSChristoph Hellwig unsigned size; 343f4800d6dSChristoph Hellwig 344f4800d6dSChristoph Hellwig if (rq->cmd_flags & REQ_DISCARD) 345f4800d6dSChristoph Hellwig size = sizeof(struct nvme_dsm_range); 346f4800d6dSChristoph Hellwig else 347f4800d6dSChristoph Hellwig size = blk_rq_bytes(rq); 348f4800d6dSChristoph Hellwig 349f4800d6dSChristoph Hellwig if (nseg > NVME_INT_PAGES || size > NVME_INT_BYTES(dev)) { 350f4800d6dSChristoph Hellwig iod->sg = kmalloc(nvme_iod_alloc_size(dev, size, nseg), GFP_ATOMIC); 351f4800d6dSChristoph Hellwig if (!iod->sg) 352f4800d6dSChristoph Hellwig return BLK_MQ_RQ_QUEUE_BUSY; 353f4800d6dSChristoph Hellwig } else { 354f4800d6dSChristoph Hellwig iod->sg = iod->inline_sg; 35557dacad5SJay Sternberg } 35657dacad5SJay Sternberg 357f4800d6dSChristoph Hellwig iod->aborted = 0; 35857dacad5SJay Sternberg iod->npages = -1; 35957dacad5SJay Sternberg iod->nents = 0; 360f4800d6dSChristoph Hellwig iod->length = size; 361f4800d6dSChristoph Hellwig return 0; 36257dacad5SJay Sternberg } 36357dacad5SJay Sternberg 364f4800d6dSChristoph Hellwig static void nvme_free_iod(struct nvme_dev *dev, struct request *req) 36557dacad5SJay Sternberg { 366f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 3675fd4ce1bSChristoph Hellwig const int last_prp = dev->ctrl.page_size / 8 - 1; 36857dacad5SJay Sternberg int i; 369f4800d6dSChristoph Hellwig __le64 **list = iod_list(req); 37057dacad5SJay Sternberg dma_addr_t prp_dma = iod->first_dma; 37157dacad5SJay Sternberg 37257dacad5SJay Sternberg if (iod->npages == 0) 37357dacad5SJay Sternberg dma_pool_free(dev->prp_small_pool, list[0], prp_dma); 37457dacad5SJay Sternberg for (i = 0; i < iod->npages; i++) { 37557dacad5SJay Sternberg __le64 *prp_list = list[i]; 37657dacad5SJay Sternberg dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); 37757dacad5SJay Sternberg dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); 37857dacad5SJay Sternberg prp_dma = next_prp_dma; 37957dacad5SJay Sternberg } 38057dacad5SJay Sternberg 381f4800d6dSChristoph Hellwig if (iod->sg != iod->inline_sg) 382f4800d6dSChristoph Hellwig kfree(iod->sg); 38357dacad5SJay Sternberg } 38457dacad5SJay Sternberg 38557dacad5SJay Sternberg #ifdef CONFIG_BLK_DEV_INTEGRITY 38657dacad5SJay Sternberg static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) 38757dacad5SJay Sternberg { 38857dacad5SJay Sternberg if (be32_to_cpu(pi->ref_tag) == v) 38957dacad5SJay Sternberg pi->ref_tag = cpu_to_be32(p); 39057dacad5SJay Sternberg } 39157dacad5SJay Sternberg 39257dacad5SJay Sternberg static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) 39357dacad5SJay Sternberg { 39457dacad5SJay Sternberg if (be32_to_cpu(pi->ref_tag) == p) 39557dacad5SJay Sternberg pi->ref_tag = cpu_to_be32(v); 39657dacad5SJay Sternberg } 39757dacad5SJay Sternberg 39857dacad5SJay Sternberg /** 39957dacad5SJay Sternberg * nvme_dif_remap - remaps ref tags to bip seed and physical lba 40057dacad5SJay Sternberg * 40157dacad5SJay Sternberg * The virtual start sector is the one that was originally submitted by the 40257dacad5SJay Sternberg * block layer. Due to partitioning, MD/DM cloning, etc. the actual physical 40357dacad5SJay Sternberg * start sector may be different. Remap protection information to match the 40457dacad5SJay Sternberg * physical LBA on writes, and back to the original seed on reads. 40557dacad5SJay Sternberg * 40657dacad5SJay Sternberg * Type 0 and 3 do not have a ref tag, so no remapping required. 40757dacad5SJay Sternberg */ 40857dacad5SJay Sternberg static void nvme_dif_remap(struct request *req, 40957dacad5SJay Sternberg void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) 41057dacad5SJay Sternberg { 41157dacad5SJay Sternberg struct nvme_ns *ns = req->rq_disk->private_data; 41257dacad5SJay Sternberg struct bio_integrity_payload *bip; 41357dacad5SJay Sternberg struct t10_pi_tuple *pi; 41457dacad5SJay Sternberg void *p, *pmap; 41557dacad5SJay Sternberg u32 i, nlb, ts, phys, virt; 41657dacad5SJay Sternberg 41757dacad5SJay Sternberg if (!ns->pi_type || ns->pi_type == NVME_NS_DPS_PI_TYPE3) 41857dacad5SJay Sternberg return; 41957dacad5SJay Sternberg 42057dacad5SJay Sternberg bip = bio_integrity(req->bio); 42157dacad5SJay Sternberg if (!bip) 42257dacad5SJay Sternberg return; 42357dacad5SJay Sternberg 42457dacad5SJay Sternberg pmap = kmap_atomic(bip->bip_vec->bv_page) + bip->bip_vec->bv_offset; 42557dacad5SJay Sternberg 42657dacad5SJay Sternberg p = pmap; 42757dacad5SJay Sternberg virt = bip_get_seed(bip); 42857dacad5SJay Sternberg phys = nvme_block_nr(ns, blk_rq_pos(req)); 42957dacad5SJay Sternberg nlb = (blk_rq_bytes(req) >> ns->lba_shift); 430ac6fc48cSDan Williams ts = ns->disk->queue->integrity.tuple_size; 43157dacad5SJay Sternberg 43257dacad5SJay Sternberg for (i = 0; i < nlb; i++, virt++, phys++) { 43357dacad5SJay Sternberg pi = (struct t10_pi_tuple *)p; 43457dacad5SJay Sternberg dif_swap(phys, virt, pi); 43557dacad5SJay Sternberg p += ts; 43657dacad5SJay Sternberg } 43757dacad5SJay Sternberg kunmap_atomic(pmap); 43857dacad5SJay Sternberg } 43957dacad5SJay Sternberg #else /* CONFIG_BLK_DEV_INTEGRITY */ 44057dacad5SJay Sternberg static void nvme_dif_remap(struct request *req, 44157dacad5SJay Sternberg void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) 44257dacad5SJay Sternberg { 44357dacad5SJay Sternberg } 44457dacad5SJay Sternberg static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) 44557dacad5SJay Sternberg { 44657dacad5SJay Sternberg } 44757dacad5SJay Sternberg static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) 44857dacad5SJay Sternberg { 44957dacad5SJay Sternberg } 45057dacad5SJay Sternberg #endif 45157dacad5SJay Sternberg 452f4800d6dSChristoph Hellwig static bool nvme_setup_prps(struct nvme_dev *dev, struct request *req, 45369d2b571SChristoph Hellwig int total_len) 45457dacad5SJay Sternberg { 455f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 45657dacad5SJay Sternberg struct dma_pool *pool; 45757dacad5SJay Sternberg int length = total_len; 45857dacad5SJay Sternberg struct scatterlist *sg = iod->sg; 45957dacad5SJay Sternberg int dma_len = sg_dma_len(sg); 46057dacad5SJay Sternberg u64 dma_addr = sg_dma_address(sg); 4615fd4ce1bSChristoph Hellwig u32 page_size = dev->ctrl.page_size; 46257dacad5SJay Sternberg int offset = dma_addr & (page_size - 1); 46357dacad5SJay Sternberg __le64 *prp_list; 464f4800d6dSChristoph Hellwig __le64 **list = iod_list(req); 46557dacad5SJay Sternberg dma_addr_t prp_dma; 46657dacad5SJay Sternberg int nprps, i; 46757dacad5SJay Sternberg 46857dacad5SJay Sternberg length -= (page_size - offset); 46957dacad5SJay Sternberg if (length <= 0) 47069d2b571SChristoph Hellwig return true; 47157dacad5SJay Sternberg 47257dacad5SJay Sternberg dma_len -= (page_size - offset); 47357dacad5SJay Sternberg if (dma_len) { 47457dacad5SJay Sternberg dma_addr += (page_size - offset); 47557dacad5SJay Sternberg } else { 47657dacad5SJay Sternberg sg = sg_next(sg); 47757dacad5SJay Sternberg dma_addr = sg_dma_address(sg); 47857dacad5SJay Sternberg dma_len = sg_dma_len(sg); 47957dacad5SJay Sternberg } 48057dacad5SJay Sternberg 48157dacad5SJay Sternberg if (length <= page_size) { 48257dacad5SJay Sternberg iod->first_dma = dma_addr; 48369d2b571SChristoph Hellwig return true; 48457dacad5SJay Sternberg } 48557dacad5SJay Sternberg 48657dacad5SJay Sternberg nprps = DIV_ROUND_UP(length, page_size); 48757dacad5SJay Sternberg if (nprps <= (256 / 8)) { 48857dacad5SJay Sternberg pool = dev->prp_small_pool; 48957dacad5SJay Sternberg iod->npages = 0; 49057dacad5SJay Sternberg } else { 49157dacad5SJay Sternberg pool = dev->prp_page_pool; 49257dacad5SJay Sternberg iod->npages = 1; 49357dacad5SJay Sternberg } 49457dacad5SJay Sternberg 49569d2b571SChristoph Hellwig prp_list = dma_pool_alloc(pool, GFP_ATOMIC, &prp_dma); 49657dacad5SJay Sternberg if (!prp_list) { 49757dacad5SJay Sternberg iod->first_dma = dma_addr; 49857dacad5SJay Sternberg iod->npages = -1; 49969d2b571SChristoph Hellwig return false; 50057dacad5SJay Sternberg } 50157dacad5SJay Sternberg list[0] = prp_list; 50257dacad5SJay Sternberg iod->first_dma = prp_dma; 50357dacad5SJay Sternberg i = 0; 50457dacad5SJay Sternberg for (;;) { 50557dacad5SJay Sternberg if (i == page_size >> 3) { 50657dacad5SJay Sternberg __le64 *old_prp_list = prp_list; 50769d2b571SChristoph Hellwig prp_list = dma_pool_alloc(pool, GFP_ATOMIC, &prp_dma); 50857dacad5SJay Sternberg if (!prp_list) 50969d2b571SChristoph Hellwig return false; 51057dacad5SJay Sternberg list[iod->npages++] = prp_list; 51157dacad5SJay Sternberg prp_list[0] = old_prp_list[i - 1]; 51257dacad5SJay Sternberg old_prp_list[i - 1] = cpu_to_le64(prp_dma); 51357dacad5SJay Sternberg i = 1; 51457dacad5SJay Sternberg } 51557dacad5SJay Sternberg prp_list[i++] = cpu_to_le64(dma_addr); 51657dacad5SJay Sternberg dma_len -= page_size; 51757dacad5SJay Sternberg dma_addr += page_size; 51857dacad5SJay Sternberg length -= page_size; 51957dacad5SJay Sternberg if (length <= 0) 52057dacad5SJay Sternberg break; 52157dacad5SJay Sternberg if (dma_len > 0) 52257dacad5SJay Sternberg continue; 52357dacad5SJay Sternberg BUG_ON(dma_len < 0); 52457dacad5SJay Sternberg sg = sg_next(sg); 52557dacad5SJay Sternberg dma_addr = sg_dma_address(sg); 52657dacad5SJay Sternberg dma_len = sg_dma_len(sg); 52757dacad5SJay Sternberg } 52857dacad5SJay Sternberg 52969d2b571SChristoph Hellwig return true; 53057dacad5SJay Sternberg } 53157dacad5SJay Sternberg 532f4800d6dSChristoph Hellwig static int nvme_map_data(struct nvme_dev *dev, struct request *req, 533ba1ca37eSChristoph Hellwig struct nvme_command *cmnd) 53457dacad5SJay Sternberg { 535f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 536ba1ca37eSChristoph Hellwig struct request_queue *q = req->q; 537ba1ca37eSChristoph Hellwig enum dma_data_direction dma_dir = rq_data_dir(req) ? 538ba1ca37eSChristoph Hellwig DMA_TO_DEVICE : DMA_FROM_DEVICE; 539ba1ca37eSChristoph Hellwig int ret = BLK_MQ_RQ_QUEUE_ERROR; 54057dacad5SJay Sternberg 541ba1ca37eSChristoph Hellwig sg_init_table(iod->sg, req->nr_phys_segments); 542ba1ca37eSChristoph Hellwig iod->nents = blk_rq_map_sg(q, req, iod->sg); 543ba1ca37eSChristoph Hellwig if (!iod->nents) 544ba1ca37eSChristoph Hellwig goto out; 545ba1ca37eSChristoph Hellwig 546ba1ca37eSChristoph Hellwig ret = BLK_MQ_RQ_QUEUE_BUSY; 547ba1ca37eSChristoph Hellwig if (!dma_map_sg(dev->dev, iod->sg, iod->nents, dma_dir)) 548ba1ca37eSChristoph Hellwig goto out; 549ba1ca37eSChristoph Hellwig 550f4800d6dSChristoph Hellwig if (!nvme_setup_prps(dev, req, blk_rq_bytes(req))) 551ba1ca37eSChristoph Hellwig goto out_unmap; 552ba1ca37eSChristoph Hellwig 553ba1ca37eSChristoph Hellwig ret = BLK_MQ_RQ_QUEUE_ERROR; 554ba1ca37eSChristoph Hellwig if (blk_integrity_rq(req)) { 555ba1ca37eSChristoph Hellwig if (blk_rq_count_integrity_sg(q, req->bio) != 1) 556ba1ca37eSChristoph Hellwig goto out_unmap; 557ba1ca37eSChristoph Hellwig 558bf684057SChristoph Hellwig sg_init_table(&iod->meta_sg, 1); 559bf684057SChristoph Hellwig if (blk_rq_map_integrity_sg(q, req->bio, &iod->meta_sg) != 1) 560ba1ca37eSChristoph Hellwig goto out_unmap; 561ba1ca37eSChristoph Hellwig 562ba1ca37eSChristoph Hellwig if (rq_data_dir(req)) 563ba1ca37eSChristoph Hellwig nvme_dif_remap(req, nvme_dif_prep); 564ba1ca37eSChristoph Hellwig 565bf684057SChristoph Hellwig if (!dma_map_sg(dev->dev, &iod->meta_sg, 1, dma_dir)) 566ba1ca37eSChristoph Hellwig goto out_unmap; 56757dacad5SJay Sternberg } 56857dacad5SJay Sternberg 569ba1ca37eSChristoph Hellwig cmnd->rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); 570ba1ca37eSChristoph Hellwig cmnd->rw.prp2 = cpu_to_le64(iod->first_dma); 571ba1ca37eSChristoph Hellwig if (blk_integrity_rq(req)) 572bf684057SChristoph Hellwig cmnd->rw.metadata = cpu_to_le64(sg_dma_address(&iod->meta_sg)); 573ba1ca37eSChristoph Hellwig return BLK_MQ_RQ_QUEUE_OK; 574ba1ca37eSChristoph Hellwig 575ba1ca37eSChristoph Hellwig out_unmap: 576ba1ca37eSChristoph Hellwig dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); 577ba1ca37eSChristoph Hellwig out: 578ba1ca37eSChristoph Hellwig return ret; 57957dacad5SJay Sternberg } 58057dacad5SJay Sternberg 581f4800d6dSChristoph Hellwig static void nvme_unmap_data(struct nvme_dev *dev, struct request *req) 582d4f6c3abSChristoph Hellwig { 583f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 584d4f6c3abSChristoph Hellwig enum dma_data_direction dma_dir = rq_data_dir(req) ? 585d4f6c3abSChristoph Hellwig DMA_TO_DEVICE : DMA_FROM_DEVICE; 586d4f6c3abSChristoph Hellwig 587d4f6c3abSChristoph Hellwig if (iod->nents) { 588d4f6c3abSChristoph Hellwig dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); 589d4f6c3abSChristoph Hellwig if (blk_integrity_rq(req)) { 590d4f6c3abSChristoph Hellwig if (!rq_data_dir(req)) 591d4f6c3abSChristoph Hellwig nvme_dif_remap(req, nvme_dif_complete); 592bf684057SChristoph Hellwig dma_unmap_sg(dev->dev, &iod->meta_sg, 1, dma_dir); 593d4f6c3abSChristoph Hellwig } 594d4f6c3abSChristoph Hellwig } 595d4f6c3abSChristoph Hellwig 596f4800d6dSChristoph Hellwig nvme_free_iod(dev, req); 59757dacad5SJay Sternberg } 59857dacad5SJay Sternberg 59957dacad5SJay Sternberg /* 60057dacad5SJay Sternberg * We reuse the small pool to allocate the 16-byte range here as it is not 60157dacad5SJay Sternberg * worth having a special pool for these or additional cases to handle freeing 60257dacad5SJay Sternberg * the iod. 60357dacad5SJay Sternberg */ 604ba1ca37eSChristoph Hellwig static int nvme_setup_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, 605f4800d6dSChristoph Hellwig struct request *req, struct nvme_command *cmnd) 60657dacad5SJay Sternberg { 607f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 608ba1ca37eSChristoph Hellwig struct nvme_dsm_range *range; 609ba1ca37eSChristoph Hellwig 610ba1ca37eSChristoph Hellwig range = dma_pool_alloc(nvmeq->dev->prp_small_pool, GFP_ATOMIC, 611ba1ca37eSChristoph Hellwig &iod->first_dma); 612ba1ca37eSChristoph Hellwig if (!range) 613ba1ca37eSChristoph Hellwig return BLK_MQ_RQ_QUEUE_BUSY; 614f4800d6dSChristoph Hellwig iod_list(req)[0] = (__le64 *)range; 615ba1ca37eSChristoph Hellwig iod->npages = 0; 61657dacad5SJay Sternberg 61757dacad5SJay Sternberg range->cattr = cpu_to_le32(0); 61857dacad5SJay Sternberg range->nlb = cpu_to_le32(blk_rq_bytes(req) >> ns->lba_shift); 61957dacad5SJay Sternberg range->slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); 62057dacad5SJay Sternberg 621ba1ca37eSChristoph Hellwig memset(cmnd, 0, sizeof(*cmnd)); 622ba1ca37eSChristoph Hellwig cmnd->dsm.opcode = nvme_cmd_dsm; 623ba1ca37eSChristoph Hellwig cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); 624ba1ca37eSChristoph Hellwig cmnd->dsm.prp1 = cpu_to_le64(iod->first_dma); 625ba1ca37eSChristoph Hellwig cmnd->dsm.nr = 0; 626ba1ca37eSChristoph Hellwig cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); 627ba1ca37eSChristoph Hellwig return BLK_MQ_RQ_QUEUE_OK; 62857dacad5SJay Sternberg } 62957dacad5SJay Sternberg 63057dacad5SJay Sternberg /* 63157dacad5SJay Sternberg * NOTE: ns is NULL when called on the admin queue. 63257dacad5SJay Sternberg */ 63357dacad5SJay Sternberg static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx, 63457dacad5SJay Sternberg const struct blk_mq_queue_data *bd) 63557dacad5SJay Sternberg { 63657dacad5SJay Sternberg struct nvme_ns *ns = hctx->queue->queuedata; 63757dacad5SJay Sternberg struct nvme_queue *nvmeq = hctx->driver_data; 63857dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 63957dacad5SJay Sternberg struct request *req = bd->rq; 640ba1ca37eSChristoph Hellwig struct nvme_command cmnd; 641ba1ca37eSChristoph Hellwig int ret = BLK_MQ_RQ_QUEUE_OK; 64257dacad5SJay Sternberg 64357dacad5SJay Sternberg /* 64457dacad5SJay Sternberg * If formated with metadata, require the block layer provide a buffer 64557dacad5SJay Sternberg * unless this namespace is formated such that the metadata can be 64657dacad5SJay Sternberg * stripped/generated by the controller with PRACT=1. 64757dacad5SJay Sternberg */ 64857dacad5SJay Sternberg if (ns && ns->ms && !blk_integrity_rq(req)) { 64957dacad5SJay Sternberg if (!(ns->pi_type && ns->ms == 8) && 65057dacad5SJay Sternberg req->cmd_type != REQ_TYPE_DRV_PRIV) { 651eee417b0SChristoph Hellwig blk_mq_end_request(req, -EFAULT); 65257dacad5SJay Sternberg return BLK_MQ_RQ_QUEUE_OK; 65357dacad5SJay Sternberg } 65457dacad5SJay Sternberg } 65557dacad5SJay Sternberg 656f4800d6dSChristoph Hellwig ret = nvme_init_iod(req, dev); 657f4800d6dSChristoph Hellwig if (ret) 658f4800d6dSChristoph Hellwig return ret; 65957dacad5SJay Sternberg 66057dacad5SJay Sternberg if (req->cmd_flags & REQ_DISCARD) { 661f4800d6dSChristoph Hellwig ret = nvme_setup_discard(nvmeq, ns, req, &cmnd); 662ba1ca37eSChristoph Hellwig } else { 66357dacad5SJay Sternberg if (req->cmd_type == REQ_TYPE_DRV_PRIV) 664ba1ca37eSChristoph Hellwig memcpy(&cmnd, req->cmd, sizeof(cmnd)); 66557dacad5SJay Sternberg else if (req->cmd_flags & REQ_FLUSH) 666ba1ca37eSChristoph Hellwig nvme_setup_flush(ns, &cmnd); 66757dacad5SJay Sternberg else 668ba1ca37eSChristoph Hellwig nvme_setup_rw(ns, req, &cmnd); 66957dacad5SJay Sternberg 670ba1ca37eSChristoph Hellwig if (req->nr_phys_segments) 671f4800d6dSChristoph Hellwig ret = nvme_map_data(dev, req, &cmnd); 672ba1ca37eSChristoph Hellwig } 673ba1ca37eSChristoph Hellwig 674ba1ca37eSChristoph Hellwig if (ret) 675ba1ca37eSChristoph Hellwig goto out; 676ba1ca37eSChristoph Hellwig 677ba1ca37eSChristoph Hellwig cmnd.common.command_id = req->tag; 678aae239e1SChristoph Hellwig blk_mq_start_request(req); 679ba1ca37eSChristoph Hellwig 680ba1ca37eSChristoph Hellwig spin_lock_irq(&nvmeq->q_lock); 681ae1fba20SKeith Busch if (unlikely(nvmeq->cq_vector < 0)) { 682ae1fba20SKeith Busch ret = BLK_MQ_RQ_QUEUE_BUSY; 683ae1fba20SKeith Busch spin_unlock_irq(&nvmeq->q_lock); 684ae1fba20SKeith Busch goto out; 685ae1fba20SKeith Busch } 686ba1ca37eSChristoph Hellwig __nvme_submit_cmd(nvmeq, &cmnd); 68757dacad5SJay Sternberg nvme_process_cq(nvmeq); 68857dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 68957dacad5SJay Sternberg return BLK_MQ_RQ_QUEUE_OK; 690ba1ca37eSChristoph Hellwig out: 691f4800d6dSChristoph Hellwig nvme_free_iod(dev, req); 692ba1ca37eSChristoph Hellwig return ret; 69357dacad5SJay Sternberg } 69457dacad5SJay Sternberg 695eee417b0SChristoph Hellwig static void nvme_complete_rq(struct request *req) 696eee417b0SChristoph Hellwig { 697f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 698f4800d6dSChristoph Hellwig struct nvme_dev *dev = iod->nvmeq->dev; 699eee417b0SChristoph Hellwig int error = 0; 700eee417b0SChristoph Hellwig 701f4800d6dSChristoph Hellwig nvme_unmap_data(dev, req); 702eee417b0SChristoph Hellwig 703eee417b0SChristoph Hellwig if (unlikely(req->errors)) { 704eee417b0SChristoph Hellwig if (nvme_req_needs_retry(req, req->errors)) { 705eee417b0SChristoph Hellwig nvme_requeue_req(req); 706eee417b0SChristoph Hellwig return; 707eee417b0SChristoph Hellwig } 708eee417b0SChristoph Hellwig 709eee417b0SChristoph Hellwig if (req->cmd_type == REQ_TYPE_DRV_PRIV) 710eee417b0SChristoph Hellwig error = req->errors; 711eee417b0SChristoph Hellwig else 712eee417b0SChristoph Hellwig error = nvme_error_status(req->errors); 713eee417b0SChristoph Hellwig } 714eee417b0SChristoph Hellwig 715f4800d6dSChristoph Hellwig if (unlikely(iod->aborted)) { 716eee417b0SChristoph Hellwig dev_warn(dev->dev, 717eee417b0SChristoph Hellwig "completing aborted command with status: %04x\n", 718eee417b0SChristoph Hellwig req->errors); 719eee417b0SChristoph Hellwig } 720eee417b0SChristoph Hellwig 721eee417b0SChristoph Hellwig blk_mq_end_request(req, error); 72257dacad5SJay Sternberg } 72357dacad5SJay Sternberg 724a0fa9647SJens Axboe static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag) 72557dacad5SJay Sternberg { 72657dacad5SJay Sternberg u16 head, phase; 72757dacad5SJay Sternberg 72857dacad5SJay Sternberg head = nvmeq->cq_head; 72957dacad5SJay Sternberg phase = nvmeq->cq_phase; 73057dacad5SJay Sternberg 73157dacad5SJay Sternberg for (;;) { 73257dacad5SJay Sternberg struct nvme_completion cqe = nvmeq->cqes[head]; 733adf68f21SChristoph Hellwig u16 status = le16_to_cpu(cqe.status); 734eee417b0SChristoph Hellwig struct request *req; 735adf68f21SChristoph Hellwig 736adf68f21SChristoph Hellwig if ((status & 1) != phase) 73757dacad5SJay Sternberg break; 73857dacad5SJay Sternberg nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 73957dacad5SJay Sternberg if (++head == nvmeq->q_depth) { 74057dacad5SJay Sternberg head = 0; 74157dacad5SJay Sternberg phase = !phase; 74257dacad5SJay Sternberg } 743adf68f21SChristoph Hellwig 744a0fa9647SJens Axboe if (tag && *tag == cqe.command_id) 745a0fa9647SJens Axboe *tag = -1; 746adf68f21SChristoph Hellwig 747aae239e1SChristoph Hellwig if (unlikely(cqe.command_id >= nvmeq->q_depth)) { 748aae239e1SChristoph Hellwig dev_warn(nvmeq->q_dmadev, 749aae239e1SChristoph Hellwig "invalid id %d completed on queue %d\n", 750aae239e1SChristoph Hellwig cqe.command_id, le16_to_cpu(cqe.sq_id)); 751aae239e1SChristoph Hellwig continue; 752aae239e1SChristoph Hellwig } 753aae239e1SChristoph Hellwig 754adf68f21SChristoph Hellwig /* 755adf68f21SChristoph Hellwig * AEN requests are special as they don't time out and can 756adf68f21SChristoph Hellwig * survive any kind of queue freeze and often don't respond to 757adf68f21SChristoph Hellwig * aborts. We don't even bother to allocate a struct request 758adf68f21SChristoph Hellwig * for them but rather special case them here. 759adf68f21SChristoph Hellwig */ 760adf68f21SChristoph Hellwig if (unlikely(nvmeq->qid == 0 && 761adf68f21SChristoph Hellwig cqe.command_id >= NVME_AQ_BLKMQ_DEPTH)) { 762adf68f21SChristoph Hellwig nvme_complete_async_event(nvmeq->dev, &cqe); 763adf68f21SChristoph Hellwig continue; 764adf68f21SChristoph Hellwig } 765adf68f21SChristoph Hellwig 766eee417b0SChristoph Hellwig req = blk_mq_tag_to_rq(*nvmeq->tags, cqe.command_id); 767eee417b0SChristoph Hellwig if (req->cmd_type == REQ_TYPE_DRV_PRIV) { 768eee417b0SChristoph Hellwig u32 result = le32_to_cpu(cqe.result); 769eee417b0SChristoph Hellwig req->special = (void *)(uintptr_t)result; 770eee417b0SChristoph Hellwig } 771eee417b0SChristoph Hellwig blk_mq_complete_request(req, status >> 1); 772eee417b0SChristoph Hellwig 77357dacad5SJay Sternberg } 77457dacad5SJay Sternberg 77557dacad5SJay Sternberg /* If the controller ignores the cq head doorbell and continuously 77657dacad5SJay Sternberg * writes to the queue, it is theoretically possible to wrap around 77757dacad5SJay Sternberg * the queue twice and mistakenly return IRQ_NONE. Linux only 77857dacad5SJay Sternberg * requires that 0.1% of your interrupts are handled, so this isn't 77957dacad5SJay Sternberg * a big problem. 78057dacad5SJay Sternberg */ 78157dacad5SJay Sternberg if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 782a0fa9647SJens Axboe return; 78357dacad5SJay Sternberg 784604e8c8dSKeith Busch if (likely(nvmeq->cq_vector >= 0)) 78557dacad5SJay Sternberg writel(head, nvmeq->q_db + nvmeq->dev->db_stride); 78657dacad5SJay Sternberg nvmeq->cq_head = head; 78757dacad5SJay Sternberg nvmeq->cq_phase = phase; 78857dacad5SJay Sternberg 78957dacad5SJay Sternberg nvmeq->cqe_seen = 1; 790a0fa9647SJens Axboe } 791a0fa9647SJens Axboe 792a0fa9647SJens Axboe static void nvme_process_cq(struct nvme_queue *nvmeq) 793a0fa9647SJens Axboe { 794a0fa9647SJens Axboe __nvme_process_cq(nvmeq, NULL); 79557dacad5SJay Sternberg } 79657dacad5SJay Sternberg 79757dacad5SJay Sternberg static irqreturn_t nvme_irq(int irq, void *data) 79857dacad5SJay Sternberg { 79957dacad5SJay Sternberg irqreturn_t result; 80057dacad5SJay Sternberg struct nvme_queue *nvmeq = data; 80157dacad5SJay Sternberg spin_lock(&nvmeq->q_lock); 80257dacad5SJay Sternberg nvme_process_cq(nvmeq); 80357dacad5SJay Sternberg result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; 80457dacad5SJay Sternberg nvmeq->cqe_seen = 0; 80557dacad5SJay Sternberg spin_unlock(&nvmeq->q_lock); 80657dacad5SJay Sternberg return result; 80757dacad5SJay Sternberg } 80857dacad5SJay Sternberg 80957dacad5SJay Sternberg static irqreturn_t nvme_irq_check(int irq, void *data) 81057dacad5SJay Sternberg { 81157dacad5SJay Sternberg struct nvme_queue *nvmeq = data; 81257dacad5SJay Sternberg struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 81357dacad5SJay Sternberg if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 81457dacad5SJay Sternberg return IRQ_NONE; 81557dacad5SJay Sternberg return IRQ_WAKE_THREAD; 81657dacad5SJay Sternberg } 81757dacad5SJay Sternberg 818a0fa9647SJens Axboe static int nvme_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) 819a0fa9647SJens Axboe { 820a0fa9647SJens Axboe struct nvme_queue *nvmeq = hctx->driver_data; 821a0fa9647SJens Axboe 822a0fa9647SJens Axboe if ((le16_to_cpu(nvmeq->cqes[nvmeq->cq_head].status) & 1) == 823a0fa9647SJens Axboe nvmeq->cq_phase) { 824a0fa9647SJens Axboe spin_lock_irq(&nvmeq->q_lock); 825a0fa9647SJens Axboe __nvme_process_cq(nvmeq, &tag); 826a0fa9647SJens Axboe spin_unlock_irq(&nvmeq->q_lock); 827a0fa9647SJens Axboe 828a0fa9647SJens Axboe if (tag == -1) 829a0fa9647SJens Axboe return 1; 830a0fa9647SJens Axboe } 831a0fa9647SJens Axboe 832a0fa9647SJens Axboe return 0; 833a0fa9647SJens Axboe } 834a0fa9647SJens Axboe 835adf68f21SChristoph Hellwig static void nvme_submit_async_event(struct nvme_dev *dev) 83657dacad5SJay Sternberg { 83757dacad5SJay Sternberg struct nvme_command c; 83857dacad5SJay Sternberg 83957dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 84057dacad5SJay Sternberg c.common.opcode = nvme_admin_async_event; 841adf68f21SChristoph Hellwig c.common.command_id = NVME_AQ_BLKMQ_DEPTH + --dev->ctrl.event_limit; 84257dacad5SJay Sternberg 843adf68f21SChristoph Hellwig __nvme_submit_cmd(dev->queues[0], &c); 84457dacad5SJay Sternberg } 84557dacad5SJay Sternberg 84657dacad5SJay Sternberg static int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 84757dacad5SJay Sternberg { 84857dacad5SJay Sternberg struct nvme_command c; 84957dacad5SJay Sternberg 85057dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 85157dacad5SJay Sternberg c.delete_queue.opcode = opcode; 85257dacad5SJay Sternberg c.delete_queue.qid = cpu_to_le16(id); 85357dacad5SJay Sternberg 8541c63dc66SChristoph Hellwig return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); 85557dacad5SJay Sternberg } 85657dacad5SJay Sternberg 85757dacad5SJay Sternberg static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 85857dacad5SJay Sternberg struct nvme_queue *nvmeq) 85957dacad5SJay Sternberg { 86057dacad5SJay Sternberg struct nvme_command c; 86157dacad5SJay Sternberg int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 86257dacad5SJay Sternberg 86357dacad5SJay Sternberg /* 86457dacad5SJay Sternberg * Note: we (ab)use the fact the the prp fields survive if no data 86557dacad5SJay Sternberg * is attached to the request. 86657dacad5SJay Sternberg */ 86757dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 86857dacad5SJay Sternberg c.create_cq.opcode = nvme_admin_create_cq; 86957dacad5SJay Sternberg c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 87057dacad5SJay Sternberg c.create_cq.cqid = cpu_to_le16(qid); 87157dacad5SJay Sternberg c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 87257dacad5SJay Sternberg c.create_cq.cq_flags = cpu_to_le16(flags); 87357dacad5SJay Sternberg c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 87457dacad5SJay Sternberg 8751c63dc66SChristoph Hellwig return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); 87657dacad5SJay Sternberg } 87757dacad5SJay Sternberg 87857dacad5SJay Sternberg static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 87957dacad5SJay Sternberg struct nvme_queue *nvmeq) 88057dacad5SJay Sternberg { 88157dacad5SJay Sternberg struct nvme_command c; 88257dacad5SJay Sternberg int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 88357dacad5SJay Sternberg 88457dacad5SJay Sternberg /* 88557dacad5SJay Sternberg * Note: we (ab)use the fact the the prp fields survive if no data 88657dacad5SJay Sternberg * is attached to the request. 88757dacad5SJay Sternberg */ 88857dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 88957dacad5SJay Sternberg c.create_sq.opcode = nvme_admin_create_sq; 89057dacad5SJay Sternberg c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 89157dacad5SJay Sternberg c.create_sq.sqid = cpu_to_le16(qid); 89257dacad5SJay Sternberg c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 89357dacad5SJay Sternberg c.create_sq.sq_flags = cpu_to_le16(flags); 89457dacad5SJay Sternberg c.create_sq.cqid = cpu_to_le16(qid); 89557dacad5SJay Sternberg 8961c63dc66SChristoph Hellwig return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); 89757dacad5SJay Sternberg } 89857dacad5SJay Sternberg 89957dacad5SJay Sternberg static int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 90057dacad5SJay Sternberg { 90157dacad5SJay Sternberg return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 90257dacad5SJay Sternberg } 90357dacad5SJay Sternberg 90457dacad5SJay Sternberg static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 90557dacad5SJay Sternberg { 90657dacad5SJay Sternberg return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 90757dacad5SJay Sternberg } 90857dacad5SJay Sternberg 909e7a2a87dSChristoph Hellwig static void abort_endio(struct request *req, int error) 91057dacad5SJay Sternberg { 911f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 912f4800d6dSChristoph Hellwig struct nvme_queue *nvmeq = iod->nvmeq; 913e7a2a87dSChristoph Hellwig u32 result = (u32)(uintptr_t)req->special; 914e7a2a87dSChristoph Hellwig u16 status = req->errors; 91557dacad5SJay Sternberg 916e7a2a87dSChristoph Hellwig dev_warn(nvmeq->q_dmadev, "Abort status:%x result:%x", status, result); 917e7a2a87dSChristoph Hellwig atomic_inc(&nvmeq->dev->ctrl.abort_limit); 91857dacad5SJay Sternberg 919e7a2a87dSChristoph Hellwig blk_mq_free_request(req); 92057dacad5SJay Sternberg } 92157dacad5SJay Sternberg 92231c7c7d2SChristoph Hellwig static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) 92357dacad5SJay Sternberg { 924f4800d6dSChristoph Hellwig struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 925f4800d6dSChristoph Hellwig struct nvme_queue *nvmeq = iod->nvmeq; 92657dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 92757dacad5SJay Sternberg struct request *abort_req; 92857dacad5SJay Sternberg struct nvme_command cmd; 92957dacad5SJay Sternberg 93031c7c7d2SChristoph Hellwig /* 931fd634f41SChristoph Hellwig * Shutdown immediately if controller times out while starting. The 932fd634f41SChristoph Hellwig * reset work will see the pci device disabled when it gets the forced 933fd634f41SChristoph Hellwig * cancellation error. All outstanding requests are completed on 934fd634f41SChristoph Hellwig * shutdown, so we return BLK_EH_HANDLED. 935fd634f41SChristoph Hellwig */ 936fd634f41SChristoph Hellwig if (test_bit(NVME_CTRL_RESETTING, &dev->flags)) { 937fd634f41SChristoph Hellwig dev_warn(dev->dev, 938fd634f41SChristoph Hellwig "I/O %d QID %d timeout, disable controller\n", 939fd634f41SChristoph Hellwig req->tag, nvmeq->qid); 940a5cdb68cSKeith Busch nvme_dev_disable(dev, false); 941fd634f41SChristoph Hellwig req->errors = NVME_SC_CANCELLED; 942fd634f41SChristoph Hellwig return BLK_EH_HANDLED; 943fd634f41SChristoph Hellwig } 944fd634f41SChristoph Hellwig 945fd634f41SChristoph Hellwig /* 946e1569a16SKeith Busch * Shutdown the controller immediately and schedule a reset if the 947e1569a16SKeith Busch * command was already aborted once before and still hasn't been 948e1569a16SKeith Busch * returned to the driver, or if this is the admin queue. 94931c7c7d2SChristoph Hellwig */ 950f4800d6dSChristoph Hellwig if (!nvmeq->qid || iod->aborted) { 95157dacad5SJay Sternberg dev_warn(dev->dev, 95257dacad5SJay Sternberg "I/O %d QID %d timeout, reset controller\n", 95357dacad5SJay Sternberg req->tag, nvmeq->qid); 954a5cdb68cSKeith Busch nvme_dev_disable(dev, false); 955e1569a16SKeith Busch queue_work(nvme_workq, &dev->reset_work); 956e1569a16SKeith Busch 957e1569a16SKeith Busch /* 958e1569a16SKeith Busch * Mark the request as handled, since the inline shutdown 959e1569a16SKeith Busch * forces all outstanding requests to complete. 960e1569a16SKeith Busch */ 961e1569a16SKeith Busch req->errors = NVME_SC_CANCELLED; 962e1569a16SKeith Busch return BLK_EH_HANDLED; 96357dacad5SJay Sternberg } 96457dacad5SJay Sternberg 965f4800d6dSChristoph Hellwig iod->aborted = 1; 96657dacad5SJay Sternberg 967e7a2a87dSChristoph Hellwig if (atomic_dec_return(&dev->ctrl.abort_limit) < 0) { 968e7a2a87dSChristoph Hellwig atomic_inc(&dev->ctrl.abort_limit); 969e7a2a87dSChristoph Hellwig return BLK_EH_RESET_TIMER; 970e7a2a87dSChristoph Hellwig } 97157dacad5SJay Sternberg 97257dacad5SJay Sternberg memset(&cmd, 0, sizeof(cmd)); 97357dacad5SJay Sternberg cmd.abort.opcode = nvme_admin_abort_cmd; 97457dacad5SJay Sternberg cmd.abort.cid = req->tag; 97557dacad5SJay Sternberg cmd.abort.sqid = cpu_to_le16(nvmeq->qid); 97657dacad5SJay Sternberg 977e7a2a87dSChristoph Hellwig dev_warn(nvmeq->q_dmadev, "I/O %d QID %d timeout, aborting\n", 97857dacad5SJay Sternberg req->tag, nvmeq->qid); 979e7a2a87dSChristoph Hellwig 980e7a2a87dSChristoph Hellwig abort_req = nvme_alloc_request(dev->ctrl.admin_q, &cmd, 9816f3b0e8bSChristoph Hellwig BLK_MQ_REQ_NOWAIT); 9826bf25d16SChristoph Hellwig if (IS_ERR(abort_req)) { 9836bf25d16SChristoph Hellwig atomic_inc(&dev->ctrl.abort_limit); 98431c7c7d2SChristoph Hellwig return BLK_EH_RESET_TIMER; 98557dacad5SJay Sternberg } 98657dacad5SJay Sternberg 987e7a2a87dSChristoph Hellwig abort_req->timeout = ADMIN_TIMEOUT; 988e7a2a87dSChristoph Hellwig abort_req->end_io_data = NULL; 989e7a2a87dSChristoph Hellwig blk_execute_rq_nowait(abort_req->q, NULL, abort_req, 0, abort_endio); 99057dacad5SJay Sternberg 99157dacad5SJay Sternberg /* 99257dacad5SJay Sternberg * The aborted req will be completed on receiving the abort req. 99357dacad5SJay Sternberg * We enable the timer again. If hit twice, it'll cause a device reset, 99457dacad5SJay Sternberg * as the device then is in a faulty state. 99557dacad5SJay Sternberg */ 99657dacad5SJay Sternberg return BLK_EH_RESET_TIMER; 99757dacad5SJay Sternberg } 99857dacad5SJay Sternberg 99957dacad5SJay Sternberg static void nvme_cancel_queue_ios(struct request *req, void *data, bool reserved) 100057dacad5SJay Sternberg { 100157dacad5SJay Sternberg struct nvme_queue *nvmeq = data; 1002aae239e1SChristoph Hellwig int status; 100357dacad5SJay Sternberg 100457dacad5SJay Sternberg if (!blk_mq_request_started(req)) 100557dacad5SJay Sternberg return; 100657dacad5SJay Sternberg 1007f8e68a7cSKeith Busch dev_dbg_ratelimited(nvmeq->q_dmadev, 1008aae239e1SChristoph Hellwig "Cancelling I/O %d QID %d\n", req->tag, nvmeq->qid); 100957dacad5SJay Sternberg 10101d49c38cSKeith Busch status = NVME_SC_ABORT_REQ; 101157dacad5SJay Sternberg if (blk_queue_dying(req->q)) 1012aae239e1SChristoph Hellwig status |= NVME_SC_DNR; 1013aae239e1SChristoph Hellwig blk_mq_complete_request(req, status); 101457dacad5SJay Sternberg } 101557dacad5SJay Sternberg 101657dacad5SJay Sternberg static void nvme_free_queue(struct nvme_queue *nvmeq) 101757dacad5SJay Sternberg { 101857dacad5SJay Sternberg dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 101957dacad5SJay Sternberg (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 102057dacad5SJay Sternberg if (nvmeq->sq_cmds) 102157dacad5SJay Sternberg dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 102257dacad5SJay Sternberg nvmeq->sq_cmds, nvmeq->sq_dma_addr); 102357dacad5SJay Sternberg kfree(nvmeq); 102457dacad5SJay Sternberg } 102557dacad5SJay Sternberg 102657dacad5SJay Sternberg static void nvme_free_queues(struct nvme_dev *dev, int lowest) 102757dacad5SJay Sternberg { 102857dacad5SJay Sternberg int i; 102957dacad5SJay Sternberg 103057dacad5SJay Sternberg for (i = dev->queue_count - 1; i >= lowest; i--) { 103157dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 103257dacad5SJay Sternberg dev->queue_count--; 103357dacad5SJay Sternberg dev->queues[i] = NULL; 103457dacad5SJay Sternberg nvme_free_queue(nvmeq); 103557dacad5SJay Sternberg } 103657dacad5SJay Sternberg } 103757dacad5SJay Sternberg 103857dacad5SJay Sternberg /** 103957dacad5SJay Sternberg * nvme_suspend_queue - put queue into suspended state 104057dacad5SJay Sternberg * @nvmeq - queue to suspend 104157dacad5SJay Sternberg */ 104257dacad5SJay Sternberg static int nvme_suspend_queue(struct nvme_queue *nvmeq) 104357dacad5SJay Sternberg { 104457dacad5SJay Sternberg int vector; 104557dacad5SJay Sternberg 104657dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 104757dacad5SJay Sternberg if (nvmeq->cq_vector == -1) { 104857dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 104957dacad5SJay Sternberg return 1; 105057dacad5SJay Sternberg } 105157dacad5SJay Sternberg vector = nvmeq->dev->entry[nvmeq->cq_vector].vector; 105257dacad5SJay Sternberg nvmeq->dev->online_queues--; 105357dacad5SJay Sternberg nvmeq->cq_vector = -1; 105457dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 105557dacad5SJay Sternberg 10561c63dc66SChristoph Hellwig if (!nvmeq->qid && nvmeq->dev->ctrl.admin_q) 105725646264SKeith Busch blk_mq_stop_hw_queues(nvmeq->dev->ctrl.admin_q); 105857dacad5SJay Sternberg 105957dacad5SJay Sternberg irq_set_affinity_hint(vector, NULL); 106057dacad5SJay Sternberg free_irq(vector, nvmeq); 106157dacad5SJay Sternberg 106257dacad5SJay Sternberg return 0; 106357dacad5SJay Sternberg } 106457dacad5SJay Sternberg 106557dacad5SJay Sternberg static void nvme_clear_queue(struct nvme_queue *nvmeq) 106657dacad5SJay Sternberg { 106757dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 106857dacad5SJay Sternberg if (nvmeq->tags && *nvmeq->tags) 106957dacad5SJay Sternberg blk_mq_all_tag_busy_iter(*nvmeq->tags, nvme_cancel_queue_ios, nvmeq); 107057dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 107157dacad5SJay Sternberg } 107257dacad5SJay Sternberg 1073a5cdb68cSKeith Busch static void nvme_disable_admin_queue(struct nvme_dev *dev, bool shutdown) 107457dacad5SJay Sternberg { 1075a5cdb68cSKeith Busch struct nvme_queue *nvmeq = dev->queues[0]; 107657dacad5SJay Sternberg 107757dacad5SJay Sternberg if (!nvmeq) 107857dacad5SJay Sternberg return; 107957dacad5SJay Sternberg if (nvme_suspend_queue(nvmeq)) 108057dacad5SJay Sternberg return; 108157dacad5SJay Sternberg 1082a5cdb68cSKeith Busch if (shutdown) 1083a5cdb68cSKeith Busch nvme_shutdown_ctrl(&dev->ctrl); 1084a5cdb68cSKeith Busch else 1085a5cdb68cSKeith Busch nvme_disable_ctrl(&dev->ctrl, lo_hi_readq( 1086a5cdb68cSKeith Busch dev->bar + NVME_REG_CAP)); 108757dacad5SJay Sternberg 108857dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 108957dacad5SJay Sternberg nvme_process_cq(nvmeq); 109057dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 109157dacad5SJay Sternberg } 109257dacad5SJay Sternberg 109357dacad5SJay Sternberg static int nvme_cmb_qdepth(struct nvme_dev *dev, int nr_io_queues, 109457dacad5SJay Sternberg int entry_size) 109557dacad5SJay Sternberg { 109657dacad5SJay Sternberg int q_depth = dev->q_depth; 10975fd4ce1bSChristoph Hellwig unsigned q_size_aligned = roundup(q_depth * entry_size, 10985fd4ce1bSChristoph Hellwig dev->ctrl.page_size); 109957dacad5SJay Sternberg 110057dacad5SJay Sternberg if (q_size_aligned * nr_io_queues > dev->cmb_size) { 110157dacad5SJay Sternberg u64 mem_per_q = div_u64(dev->cmb_size, nr_io_queues); 11025fd4ce1bSChristoph Hellwig mem_per_q = round_down(mem_per_q, dev->ctrl.page_size); 110357dacad5SJay Sternberg q_depth = div_u64(mem_per_q, entry_size); 110457dacad5SJay Sternberg 110557dacad5SJay Sternberg /* 110657dacad5SJay Sternberg * Ensure the reduced q_depth is above some threshold where it 110757dacad5SJay Sternberg * would be better to map queues in system memory with the 110857dacad5SJay Sternberg * original depth 110957dacad5SJay Sternberg */ 111057dacad5SJay Sternberg if (q_depth < 64) 111157dacad5SJay Sternberg return -ENOMEM; 111257dacad5SJay Sternberg } 111357dacad5SJay Sternberg 111457dacad5SJay Sternberg return q_depth; 111557dacad5SJay Sternberg } 111657dacad5SJay Sternberg 111757dacad5SJay Sternberg static int nvme_alloc_sq_cmds(struct nvme_dev *dev, struct nvme_queue *nvmeq, 111857dacad5SJay Sternberg int qid, int depth) 111957dacad5SJay Sternberg { 112057dacad5SJay Sternberg if (qid && dev->cmb && use_cmb_sqes && NVME_CMB_SQS(dev->cmbsz)) { 11215fd4ce1bSChristoph Hellwig unsigned offset = (qid - 1) * roundup(SQ_SIZE(depth), 11225fd4ce1bSChristoph Hellwig dev->ctrl.page_size); 112357dacad5SJay Sternberg nvmeq->sq_dma_addr = dev->cmb_dma_addr + offset; 112457dacad5SJay Sternberg nvmeq->sq_cmds_io = dev->cmb + offset; 112557dacad5SJay Sternberg } else { 112657dacad5SJay Sternberg nvmeq->sq_cmds = dma_alloc_coherent(dev->dev, SQ_SIZE(depth), 112757dacad5SJay Sternberg &nvmeq->sq_dma_addr, GFP_KERNEL); 112857dacad5SJay Sternberg if (!nvmeq->sq_cmds) 112957dacad5SJay Sternberg return -ENOMEM; 113057dacad5SJay Sternberg } 113157dacad5SJay Sternberg 113257dacad5SJay Sternberg return 0; 113357dacad5SJay Sternberg } 113457dacad5SJay Sternberg 113557dacad5SJay Sternberg static struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 113657dacad5SJay Sternberg int depth) 113757dacad5SJay Sternberg { 113857dacad5SJay Sternberg struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq), GFP_KERNEL); 113957dacad5SJay Sternberg if (!nvmeq) 114057dacad5SJay Sternberg return NULL; 114157dacad5SJay Sternberg 114257dacad5SJay Sternberg nvmeq->cqes = dma_zalloc_coherent(dev->dev, CQ_SIZE(depth), 114357dacad5SJay Sternberg &nvmeq->cq_dma_addr, GFP_KERNEL); 114457dacad5SJay Sternberg if (!nvmeq->cqes) 114557dacad5SJay Sternberg goto free_nvmeq; 114657dacad5SJay Sternberg 114757dacad5SJay Sternberg if (nvme_alloc_sq_cmds(dev, nvmeq, qid, depth)) 114857dacad5SJay Sternberg goto free_cqdma; 114957dacad5SJay Sternberg 115057dacad5SJay Sternberg nvmeq->q_dmadev = dev->dev; 115157dacad5SJay Sternberg nvmeq->dev = dev; 115257dacad5SJay Sternberg snprintf(nvmeq->irqname, sizeof(nvmeq->irqname), "nvme%dq%d", 11531c63dc66SChristoph Hellwig dev->ctrl.instance, qid); 115457dacad5SJay Sternberg spin_lock_init(&nvmeq->q_lock); 115557dacad5SJay Sternberg nvmeq->cq_head = 0; 115657dacad5SJay Sternberg nvmeq->cq_phase = 1; 115757dacad5SJay Sternberg nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 115857dacad5SJay Sternberg nvmeq->q_depth = depth; 115957dacad5SJay Sternberg nvmeq->qid = qid; 116057dacad5SJay Sternberg nvmeq->cq_vector = -1; 116157dacad5SJay Sternberg dev->queues[qid] = nvmeq; 116257dacad5SJay Sternberg 116357dacad5SJay Sternberg /* make sure queue descriptor is set before queue count, for kthread */ 116457dacad5SJay Sternberg mb(); 116557dacad5SJay Sternberg dev->queue_count++; 116657dacad5SJay Sternberg 116757dacad5SJay Sternberg return nvmeq; 116857dacad5SJay Sternberg 116957dacad5SJay Sternberg free_cqdma: 117057dacad5SJay Sternberg dma_free_coherent(dev->dev, CQ_SIZE(depth), (void *)nvmeq->cqes, 117157dacad5SJay Sternberg nvmeq->cq_dma_addr); 117257dacad5SJay Sternberg free_nvmeq: 117357dacad5SJay Sternberg kfree(nvmeq); 117457dacad5SJay Sternberg return NULL; 117557dacad5SJay Sternberg } 117657dacad5SJay Sternberg 117757dacad5SJay Sternberg static int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 117857dacad5SJay Sternberg const char *name) 117957dacad5SJay Sternberg { 118057dacad5SJay Sternberg if (use_threaded_interrupts) 118157dacad5SJay Sternberg return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 118257dacad5SJay Sternberg nvme_irq_check, nvme_irq, IRQF_SHARED, 118357dacad5SJay Sternberg name, nvmeq); 118457dacad5SJay Sternberg return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 118557dacad5SJay Sternberg IRQF_SHARED, name, nvmeq); 118657dacad5SJay Sternberg } 118757dacad5SJay Sternberg 118857dacad5SJay Sternberg static void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) 118957dacad5SJay Sternberg { 119057dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 119157dacad5SJay Sternberg 119257dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 119357dacad5SJay Sternberg nvmeq->sq_tail = 0; 119457dacad5SJay Sternberg nvmeq->cq_head = 0; 119557dacad5SJay Sternberg nvmeq->cq_phase = 1; 119657dacad5SJay Sternberg nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 119757dacad5SJay Sternberg memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); 119857dacad5SJay Sternberg dev->online_queues++; 119957dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 120057dacad5SJay Sternberg } 120157dacad5SJay Sternberg 120257dacad5SJay Sternberg static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) 120357dacad5SJay Sternberg { 120457dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 120557dacad5SJay Sternberg int result; 120657dacad5SJay Sternberg 120757dacad5SJay Sternberg nvmeq->cq_vector = qid - 1; 120857dacad5SJay Sternberg result = adapter_alloc_cq(dev, qid, nvmeq); 120957dacad5SJay Sternberg if (result < 0) 121057dacad5SJay Sternberg return result; 121157dacad5SJay Sternberg 121257dacad5SJay Sternberg result = adapter_alloc_sq(dev, qid, nvmeq); 121357dacad5SJay Sternberg if (result < 0) 121457dacad5SJay Sternberg goto release_cq; 121557dacad5SJay Sternberg 121657dacad5SJay Sternberg result = queue_request_irq(dev, nvmeq, nvmeq->irqname); 121757dacad5SJay Sternberg if (result < 0) 121857dacad5SJay Sternberg goto release_sq; 121957dacad5SJay Sternberg 122057dacad5SJay Sternberg nvme_init_queue(nvmeq, qid); 122157dacad5SJay Sternberg return result; 122257dacad5SJay Sternberg 122357dacad5SJay Sternberg release_sq: 122457dacad5SJay Sternberg adapter_delete_sq(dev, qid); 122557dacad5SJay Sternberg release_cq: 122657dacad5SJay Sternberg adapter_delete_cq(dev, qid); 122757dacad5SJay Sternberg return result; 122857dacad5SJay Sternberg } 122957dacad5SJay Sternberg 123057dacad5SJay Sternberg static struct blk_mq_ops nvme_mq_admin_ops = { 123157dacad5SJay Sternberg .queue_rq = nvme_queue_rq, 1232eee417b0SChristoph Hellwig .complete = nvme_complete_rq, 123357dacad5SJay Sternberg .map_queue = blk_mq_map_queue, 123457dacad5SJay Sternberg .init_hctx = nvme_admin_init_hctx, 123557dacad5SJay Sternberg .exit_hctx = nvme_admin_exit_hctx, 123657dacad5SJay Sternberg .init_request = nvme_admin_init_request, 123757dacad5SJay Sternberg .timeout = nvme_timeout, 123857dacad5SJay Sternberg }; 123957dacad5SJay Sternberg 124057dacad5SJay Sternberg static struct blk_mq_ops nvme_mq_ops = { 124157dacad5SJay Sternberg .queue_rq = nvme_queue_rq, 1242eee417b0SChristoph Hellwig .complete = nvme_complete_rq, 124357dacad5SJay Sternberg .map_queue = blk_mq_map_queue, 124457dacad5SJay Sternberg .init_hctx = nvme_init_hctx, 124557dacad5SJay Sternberg .init_request = nvme_init_request, 124657dacad5SJay Sternberg .timeout = nvme_timeout, 1247a0fa9647SJens Axboe .poll = nvme_poll, 124857dacad5SJay Sternberg }; 124957dacad5SJay Sternberg 125057dacad5SJay Sternberg static void nvme_dev_remove_admin(struct nvme_dev *dev) 125157dacad5SJay Sternberg { 12521c63dc66SChristoph Hellwig if (dev->ctrl.admin_q && !blk_queue_dying(dev->ctrl.admin_q)) { 12531c63dc66SChristoph Hellwig blk_cleanup_queue(dev->ctrl.admin_q); 125457dacad5SJay Sternberg blk_mq_free_tag_set(&dev->admin_tagset); 125557dacad5SJay Sternberg } 125657dacad5SJay Sternberg } 125757dacad5SJay Sternberg 125857dacad5SJay Sternberg static int nvme_alloc_admin_tags(struct nvme_dev *dev) 125957dacad5SJay Sternberg { 12601c63dc66SChristoph Hellwig if (!dev->ctrl.admin_q) { 126157dacad5SJay Sternberg dev->admin_tagset.ops = &nvme_mq_admin_ops; 126257dacad5SJay Sternberg dev->admin_tagset.nr_hw_queues = 1; 1263e3e9d50cSKeith Busch 1264e3e9d50cSKeith Busch /* 1265e3e9d50cSKeith Busch * Subtract one to leave an empty queue entry for 'Full Queue' 1266e3e9d50cSKeith Busch * condition. See NVM-Express 1.2 specification, section 4.1.2. 1267e3e9d50cSKeith Busch */ 1268e3e9d50cSKeith Busch dev->admin_tagset.queue_depth = NVME_AQ_BLKMQ_DEPTH - 1; 126957dacad5SJay Sternberg dev->admin_tagset.timeout = ADMIN_TIMEOUT; 127057dacad5SJay Sternberg dev->admin_tagset.numa_node = dev_to_node(dev->dev); 127157dacad5SJay Sternberg dev->admin_tagset.cmd_size = nvme_cmd_size(dev); 127257dacad5SJay Sternberg dev->admin_tagset.driver_data = dev; 127357dacad5SJay Sternberg 127457dacad5SJay Sternberg if (blk_mq_alloc_tag_set(&dev->admin_tagset)) 127557dacad5SJay Sternberg return -ENOMEM; 127657dacad5SJay Sternberg 12771c63dc66SChristoph Hellwig dev->ctrl.admin_q = blk_mq_init_queue(&dev->admin_tagset); 12781c63dc66SChristoph Hellwig if (IS_ERR(dev->ctrl.admin_q)) { 127957dacad5SJay Sternberg blk_mq_free_tag_set(&dev->admin_tagset); 128057dacad5SJay Sternberg return -ENOMEM; 128157dacad5SJay Sternberg } 12821c63dc66SChristoph Hellwig if (!blk_get_queue(dev->ctrl.admin_q)) { 128357dacad5SJay Sternberg nvme_dev_remove_admin(dev); 12841c63dc66SChristoph Hellwig dev->ctrl.admin_q = NULL; 128557dacad5SJay Sternberg return -ENODEV; 128657dacad5SJay Sternberg } 128757dacad5SJay Sternberg } else 128825646264SKeith Busch blk_mq_start_stopped_hw_queues(dev->ctrl.admin_q, true); 128957dacad5SJay Sternberg 129057dacad5SJay Sternberg return 0; 129157dacad5SJay Sternberg } 129257dacad5SJay Sternberg 129357dacad5SJay Sternberg static int nvme_configure_admin_queue(struct nvme_dev *dev) 129457dacad5SJay Sternberg { 129557dacad5SJay Sternberg int result; 129657dacad5SJay Sternberg u32 aqa; 12977a67cbeaSChristoph Hellwig u64 cap = lo_hi_readq(dev->bar + NVME_REG_CAP); 129857dacad5SJay Sternberg struct nvme_queue *nvmeq; 129957dacad5SJay Sternberg 13007a67cbeaSChristoph Hellwig dev->subsystem = readl(dev->bar + NVME_REG_VS) >= NVME_VS(1, 1) ? 130157dacad5SJay Sternberg NVME_CAP_NSSRC(cap) : 0; 130257dacad5SJay Sternberg 13037a67cbeaSChristoph Hellwig if (dev->subsystem && 13047a67cbeaSChristoph Hellwig (readl(dev->bar + NVME_REG_CSTS) & NVME_CSTS_NSSRO)) 13057a67cbeaSChristoph Hellwig writel(NVME_CSTS_NSSRO, dev->bar + NVME_REG_CSTS); 130657dacad5SJay Sternberg 13075fd4ce1bSChristoph Hellwig result = nvme_disable_ctrl(&dev->ctrl, cap); 130857dacad5SJay Sternberg if (result < 0) 130957dacad5SJay Sternberg return result; 131057dacad5SJay Sternberg 131157dacad5SJay Sternberg nvmeq = dev->queues[0]; 131257dacad5SJay Sternberg if (!nvmeq) { 131357dacad5SJay Sternberg nvmeq = nvme_alloc_queue(dev, 0, NVME_AQ_DEPTH); 131457dacad5SJay Sternberg if (!nvmeq) 131557dacad5SJay Sternberg return -ENOMEM; 131657dacad5SJay Sternberg } 131757dacad5SJay Sternberg 131857dacad5SJay Sternberg aqa = nvmeq->q_depth - 1; 131957dacad5SJay Sternberg aqa |= aqa << 16; 132057dacad5SJay Sternberg 13217a67cbeaSChristoph Hellwig writel(aqa, dev->bar + NVME_REG_AQA); 13227a67cbeaSChristoph Hellwig lo_hi_writeq(nvmeq->sq_dma_addr, dev->bar + NVME_REG_ASQ); 13237a67cbeaSChristoph Hellwig lo_hi_writeq(nvmeq->cq_dma_addr, dev->bar + NVME_REG_ACQ); 132457dacad5SJay Sternberg 13255fd4ce1bSChristoph Hellwig result = nvme_enable_ctrl(&dev->ctrl, cap); 132657dacad5SJay Sternberg if (result) 132757dacad5SJay Sternberg goto free_nvmeq; 132857dacad5SJay Sternberg 132957dacad5SJay Sternberg nvmeq->cq_vector = 0; 133057dacad5SJay Sternberg result = queue_request_irq(dev, nvmeq, nvmeq->irqname); 133157dacad5SJay Sternberg if (result) { 133257dacad5SJay Sternberg nvmeq->cq_vector = -1; 133357dacad5SJay Sternberg goto free_nvmeq; 133457dacad5SJay Sternberg } 133557dacad5SJay Sternberg 133657dacad5SJay Sternberg return result; 133757dacad5SJay Sternberg 133857dacad5SJay Sternberg free_nvmeq: 133957dacad5SJay Sternberg nvme_free_queues(dev, 0); 134057dacad5SJay Sternberg return result; 134157dacad5SJay Sternberg } 134257dacad5SJay Sternberg 134357dacad5SJay Sternberg static int nvme_kthread(void *data) 134457dacad5SJay Sternberg { 134557dacad5SJay Sternberg struct nvme_dev *dev, *next; 134657dacad5SJay Sternberg 134757dacad5SJay Sternberg while (!kthread_should_stop()) { 134857dacad5SJay Sternberg set_current_state(TASK_INTERRUPTIBLE); 134957dacad5SJay Sternberg spin_lock(&dev_list_lock); 135057dacad5SJay Sternberg list_for_each_entry_safe(dev, next, &dev_list, node) { 135157dacad5SJay Sternberg int i; 13527a67cbeaSChristoph Hellwig u32 csts = readl(dev->bar + NVME_REG_CSTS); 135357dacad5SJay Sternberg 1354846cc05fSChristoph Hellwig /* 1355846cc05fSChristoph Hellwig * Skip controllers currently under reset. 1356846cc05fSChristoph Hellwig */ 1357846cc05fSChristoph Hellwig if (work_pending(&dev->reset_work) || work_busy(&dev->reset_work)) 1358846cc05fSChristoph Hellwig continue; 135957dacad5SJay Sternberg 136057dacad5SJay Sternberg if ((dev->subsystem && (csts & NVME_CSTS_NSSRO)) || 136157dacad5SJay Sternberg csts & NVME_CSTS_CFS) { 1362846cc05fSChristoph Hellwig if (queue_work(nvme_workq, &dev->reset_work)) { 136357dacad5SJay Sternberg dev_warn(dev->dev, 136457dacad5SJay Sternberg "Failed status: %x, reset controller\n", 13657a67cbeaSChristoph Hellwig readl(dev->bar + NVME_REG_CSTS)); 136657dacad5SJay Sternberg } 136757dacad5SJay Sternberg continue; 136857dacad5SJay Sternberg } 136957dacad5SJay Sternberg for (i = 0; i < dev->queue_count; i++) { 137057dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 137157dacad5SJay Sternberg if (!nvmeq) 137257dacad5SJay Sternberg continue; 137357dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 137457dacad5SJay Sternberg nvme_process_cq(nvmeq); 137557dacad5SJay Sternberg 1376adf68f21SChristoph Hellwig while (i == 0 && dev->ctrl.event_limit > 0) 1377adf68f21SChristoph Hellwig nvme_submit_async_event(dev); 137857dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 137957dacad5SJay Sternberg } 138057dacad5SJay Sternberg } 138157dacad5SJay Sternberg spin_unlock(&dev_list_lock); 138257dacad5SJay Sternberg schedule_timeout(round_jiffies_relative(HZ)); 138357dacad5SJay Sternberg } 138457dacad5SJay Sternberg return 0; 138557dacad5SJay Sternberg } 138657dacad5SJay Sternberg 1387749941f2SChristoph Hellwig static int nvme_create_io_queues(struct nvme_dev *dev) 138857dacad5SJay Sternberg { 138957dacad5SJay Sternberg unsigned i; 1390749941f2SChristoph Hellwig int ret = 0; 139157dacad5SJay Sternberg 1392749941f2SChristoph Hellwig for (i = dev->queue_count; i <= dev->max_qid; i++) { 1393749941f2SChristoph Hellwig if (!nvme_alloc_queue(dev, i, dev->q_depth)) { 1394749941f2SChristoph Hellwig ret = -ENOMEM; 139557dacad5SJay Sternberg break; 1396749941f2SChristoph Hellwig } 1397749941f2SChristoph Hellwig } 139857dacad5SJay Sternberg 1399749941f2SChristoph Hellwig for (i = dev->online_queues; i <= dev->queue_count - 1; i++) { 1400749941f2SChristoph Hellwig ret = nvme_create_queue(dev->queues[i], i); 1401749941f2SChristoph Hellwig if (ret) { 140257dacad5SJay Sternberg nvme_free_queues(dev, i); 140357dacad5SJay Sternberg break; 140457dacad5SJay Sternberg } 140557dacad5SJay Sternberg } 140657dacad5SJay Sternberg 1407749941f2SChristoph Hellwig /* 1408749941f2SChristoph Hellwig * Ignore failing Create SQ/CQ commands, we can continue with less 1409749941f2SChristoph Hellwig * than the desired aount of queues, and even a controller without 1410749941f2SChristoph Hellwig * I/O queues an still be used to issue admin commands. This might 1411749941f2SChristoph Hellwig * be useful to upgrade a buggy firmware for example. 1412749941f2SChristoph Hellwig */ 1413749941f2SChristoph Hellwig return ret >= 0 ? 0 : ret; 141457dacad5SJay Sternberg } 141557dacad5SJay Sternberg 141657dacad5SJay Sternberg static void __iomem *nvme_map_cmb(struct nvme_dev *dev) 141757dacad5SJay Sternberg { 141857dacad5SJay Sternberg u64 szu, size, offset; 141957dacad5SJay Sternberg u32 cmbloc; 142057dacad5SJay Sternberg resource_size_t bar_size; 142157dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 142257dacad5SJay Sternberg void __iomem *cmb; 142357dacad5SJay Sternberg dma_addr_t dma_addr; 142457dacad5SJay Sternberg 142557dacad5SJay Sternberg if (!use_cmb_sqes) 142657dacad5SJay Sternberg return NULL; 142757dacad5SJay Sternberg 14287a67cbeaSChristoph Hellwig dev->cmbsz = readl(dev->bar + NVME_REG_CMBSZ); 142957dacad5SJay Sternberg if (!(NVME_CMB_SZ(dev->cmbsz))) 143057dacad5SJay Sternberg return NULL; 143157dacad5SJay Sternberg 14327a67cbeaSChristoph Hellwig cmbloc = readl(dev->bar + NVME_REG_CMBLOC); 143357dacad5SJay Sternberg 143457dacad5SJay Sternberg szu = (u64)1 << (12 + 4 * NVME_CMB_SZU(dev->cmbsz)); 143557dacad5SJay Sternberg size = szu * NVME_CMB_SZ(dev->cmbsz); 143657dacad5SJay Sternberg offset = szu * NVME_CMB_OFST(cmbloc); 143757dacad5SJay Sternberg bar_size = pci_resource_len(pdev, NVME_CMB_BIR(cmbloc)); 143857dacad5SJay Sternberg 143957dacad5SJay Sternberg if (offset > bar_size) 144057dacad5SJay Sternberg return NULL; 144157dacad5SJay Sternberg 144257dacad5SJay Sternberg /* 144357dacad5SJay Sternberg * Controllers may support a CMB size larger than their BAR, 144457dacad5SJay Sternberg * for example, due to being behind a bridge. Reduce the CMB to 144557dacad5SJay Sternberg * the reported size of the BAR 144657dacad5SJay Sternberg */ 144757dacad5SJay Sternberg if (size > bar_size - offset) 144857dacad5SJay Sternberg size = bar_size - offset; 144957dacad5SJay Sternberg 145057dacad5SJay Sternberg dma_addr = pci_resource_start(pdev, NVME_CMB_BIR(cmbloc)) + offset; 145157dacad5SJay Sternberg cmb = ioremap_wc(dma_addr, size); 145257dacad5SJay Sternberg if (!cmb) 145357dacad5SJay Sternberg return NULL; 145457dacad5SJay Sternberg 145557dacad5SJay Sternberg dev->cmb_dma_addr = dma_addr; 145657dacad5SJay Sternberg dev->cmb_size = size; 145757dacad5SJay Sternberg return cmb; 145857dacad5SJay Sternberg } 145957dacad5SJay Sternberg 146057dacad5SJay Sternberg static inline void nvme_release_cmb(struct nvme_dev *dev) 146157dacad5SJay Sternberg { 146257dacad5SJay Sternberg if (dev->cmb) { 146357dacad5SJay Sternberg iounmap(dev->cmb); 146457dacad5SJay Sternberg dev->cmb = NULL; 146557dacad5SJay Sternberg } 146657dacad5SJay Sternberg } 146757dacad5SJay Sternberg 146857dacad5SJay Sternberg static size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) 146957dacad5SJay Sternberg { 147057dacad5SJay Sternberg return 4096 + ((nr_io_queues + 1) * 8 * dev->db_stride); 147157dacad5SJay Sternberg } 147257dacad5SJay Sternberg 147357dacad5SJay Sternberg static int nvme_setup_io_queues(struct nvme_dev *dev) 147457dacad5SJay Sternberg { 147557dacad5SJay Sternberg struct nvme_queue *adminq = dev->queues[0]; 147657dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 147757dacad5SJay Sternberg int result, i, vecs, nr_io_queues, size; 147857dacad5SJay Sternberg 147957dacad5SJay Sternberg nr_io_queues = num_possible_cpus(); 14809a0be7abSChristoph Hellwig result = nvme_set_queue_count(&dev->ctrl, &nr_io_queues); 14819a0be7abSChristoph Hellwig if (result < 0) 148257dacad5SJay Sternberg return result; 14839a0be7abSChristoph Hellwig 14849a0be7abSChristoph Hellwig /* 14859a0be7abSChristoph Hellwig * Degraded controllers might return an error when setting the queue 14869a0be7abSChristoph Hellwig * count. We still want to be able to bring them online and offer 14879a0be7abSChristoph Hellwig * access to the admin queue, as that might be only way to fix them up. 14889a0be7abSChristoph Hellwig */ 14899a0be7abSChristoph Hellwig if (result > 0) { 14909a0be7abSChristoph Hellwig dev_err(dev->dev, "Could not set queue count (%d)\n", result); 14919a0be7abSChristoph Hellwig nr_io_queues = 0; 14929a0be7abSChristoph Hellwig result = 0; 14939a0be7abSChristoph Hellwig } 149457dacad5SJay Sternberg 149557dacad5SJay Sternberg if (dev->cmb && NVME_CMB_SQS(dev->cmbsz)) { 149657dacad5SJay Sternberg result = nvme_cmb_qdepth(dev, nr_io_queues, 149757dacad5SJay Sternberg sizeof(struct nvme_command)); 149857dacad5SJay Sternberg if (result > 0) 149957dacad5SJay Sternberg dev->q_depth = result; 150057dacad5SJay Sternberg else 150157dacad5SJay Sternberg nvme_release_cmb(dev); 150257dacad5SJay Sternberg } 150357dacad5SJay Sternberg 150457dacad5SJay Sternberg size = db_bar_size(dev, nr_io_queues); 150557dacad5SJay Sternberg if (size > 8192) { 150657dacad5SJay Sternberg iounmap(dev->bar); 150757dacad5SJay Sternberg do { 150857dacad5SJay Sternberg dev->bar = ioremap(pci_resource_start(pdev, 0), size); 150957dacad5SJay Sternberg if (dev->bar) 151057dacad5SJay Sternberg break; 151157dacad5SJay Sternberg if (!--nr_io_queues) 151257dacad5SJay Sternberg return -ENOMEM; 151357dacad5SJay Sternberg size = db_bar_size(dev, nr_io_queues); 151457dacad5SJay Sternberg } while (1); 15157a67cbeaSChristoph Hellwig dev->dbs = dev->bar + 4096; 151657dacad5SJay Sternberg adminq->q_db = dev->dbs; 151757dacad5SJay Sternberg } 151857dacad5SJay Sternberg 151957dacad5SJay Sternberg /* Deregister the admin queue's interrupt */ 152057dacad5SJay Sternberg free_irq(dev->entry[0].vector, adminq); 152157dacad5SJay Sternberg 152257dacad5SJay Sternberg /* 152357dacad5SJay Sternberg * If we enable msix early due to not intx, disable it again before 152457dacad5SJay Sternberg * setting up the full range we need. 152557dacad5SJay Sternberg */ 152657dacad5SJay Sternberg if (!pdev->irq) 152757dacad5SJay Sternberg pci_disable_msix(pdev); 152857dacad5SJay Sternberg 152957dacad5SJay Sternberg for (i = 0; i < nr_io_queues; i++) 153057dacad5SJay Sternberg dev->entry[i].entry = i; 153157dacad5SJay Sternberg vecs = pci_enable_msix_range(pdev, dev->entry, 1, nr_io_queues); 153257dacad5SJay Sternberg if (vecs < 0) { 153357dacad5SJay Sternberg vecs = pci_enable_msi_range(pdev, 1, min(nr_io_queues, 32)); 153457dacad5SJay Sternberg if (vecs < 0) { 153557dacad5SJay Sternberg vecs = 1; 153657dacad5SJay Sternberg } else { 153757dacad5SJay Sternberg for (i = 0; i < vecs; i++) 153857dacad5SJay Sternberg dev->entry[i].vector = i + pdev->irq; 153957dacad5SJay Sternberg } 154057dacad5SJay Sternberg } 154157dacad5SJay Sternberg 154257dacad5SJay Sternberg /* 154357dacad5SJay Sternberg * Should investigate if there's a performance win from allocating 154457dacad5SJay Sternberg * more queues than interrupt vectors; it might allow the submission 154557dacad5SJay Sternberg * path to scale better, even if the receive path is limited by the 154657dacad5SJay Sternberg * number of interrupts. 154757dacad5SJay Sternberg */ 154857dacad5SJay Sternberg nr_io_queues = vecs; 154957dacad5SJay Sternberg dev->max_qid = nr_io_queues; 155057dacad5SJay Sternberg 155157dacad5SJay Sternberg result = queue_request_irq(dev, adminq, adminq->irqname); 155257dacad5SJay Sternberg if (result) { 155357dacad5SJay Sternberg adminq->cq_vector = -1; 155457dacad5SJay Sternberg goto free_queues; 155557dacad5SJay Sternberg } 155657dacad5SJay Sternberg 155757dacad5SJay Sternberg /* Free previously allocated queues that are no longer usable */ 155857dacad5SJay Sternberg nvme_free_queues(dev, nr_io_queues + 1); 1559749941f2SChristoph Hellwig return nvme_create_io_queues(dev); 156057dacad5SJay Sternberg 156157dacad5SJay Sternberg free_queues: 156257dacad5SJay Sternberg nvme_free_queues(dev, 1); 156357dacad5SJay Sternberg return result; 156457dacad5SJay Sternberg } 156557dacad5SJay Sternberg 156657dacad5SJay Sternberg static void nvme_set_irq_hints(struct nvme_dev *dev) 156757dacad5SJay Sternberg { 156857dacad5SJay Sternberg struct nvme_queue *nvmeq; 156957dacad5SJay Sternberg int i; 157057dacad5SJay Sternberg 157157dacad5SJay Sternberg for (i = 0; i < dev->online_queues; i++) { 157257dacad5SJay Sternberg nvmeq = dev->queues[i]; 157357dacad5SJay Sternberg 157457dacad5SJay Sternberg if (!nvmeq->tags || !(*nvmeq->tags)) 157557dacad5SJay Sternberg continue; 157657dacad5SJay Sternberg 157757dacad5SJay Sternberg irq_set_affinity_hint(dev->entry[nvmeq->cq_vector].vector, 157857dacad5SJay Sternberg blk_mq_tags_cpumask(*nvmeq->tags)); 157957dacad5SJay Sternberg } 158057dacad5SJay Sternberg } 158157dacad5SJay Sternberg 158257dacad5SJay Sternberg static void nvme_dev_scan(struct work_struct *work) 158357dacad5SJay Sternberg { 158457dacad5SJay Sternberg struct nvme_dev *dev = container_of(work, struct nvme_dev, scan_work); 158557dacad5SJay Sternberg 158657dacad5SJay Sternberg if (!dev->tagset.tags) 158757dacad5SJay Sternberg return; 15885bae7f73SChristoph Hellwig nvme_scan_namespaces(&dev->ctrl); 158957dacad5SJay Sternberg nvme_set_irq_hints(dev); 159057dacad5SJay Sternberg } 159157dacad5SJay Sternberg 1592db3cbfffSKeith Busch static void nvme_del_queue_end(struct request *req, int error) 1593db3cbfffSKeith Busch { 1594db3cbfffSKeith Busch struct nvme_queue *nvmeq = req->end_io_data; 1595db3cbfffSKeith Busch 1596db3cbfffSKeith Busch blk_mq_free_request(req); 1597db3cbfffSKeith Busch complete(&nvmeq->dev->ioq_wait); 1598db3cbfffSKeith Busch } 1599db3cbfffSKeith Busch 1600db3cbfffSKeith Busch static void nvme_del_cq_end(struct request *req, int error) 1601db3cbfffSKeith Busch { 1602db3cbfffSKeith Busch struct nvme_queue *nvmeq = req->end_io_data; 1603db3cbfffSKeith Busch 1604db3cbfffSKeith Busch if (!error) { 1605db3cbfffSKeith Busch unsigned long flags; 1606db3cbfffSKeith Busch 1607db3cbfffSKeith Busch spin_lock_irqsave(&nvmeq->q_lock, flags); 1608db3cbfffSKeith Busch nvme_process_cq(nvmeq); 1609db3cbfffSKeith Busch spin_unlock_irqrestore(&nvmeq->q_lock, flags); 1610db3cbfffSKeith Busch } 1611db3cbfffSKeith Busch 1612db3cbfffSKeith Busch nvme_del_queue_end(req, error); 1613db3cbfffSKeith Busch } 1614db3cbfffSKeith Busch 1615db3cbfffSKeith Busch static int nvme_delete_queue(struct nvme_queue *nvmeq, u8 opcode) 1616db3cbfffSKeith Busch { 1617db3cbfffSKeith Busch struct request_queue *q = nvmeq->dev->ctrl.admin_q; 1618db3cbfffSKeith Busch struct request *req; 1619db3cbfffSKeith Busch struct nvme_command cmd; 1620db3cbfffSKeith Busch 1621db3cbfffSKeith Busch memset(&cmd, 0, sizeof(cmd)); 1622db3cbfffSKeith Busch cmd.delete_queue.opcode = opcode; 1623db3cbfffSKeith Busch cmd.delete_queue.qid = cpu_to_le16(nvmeq->qid); 1624db3cbfffSKeith Busch 1625db3cbfffSKeith Busch req = nvme_alloc_request(q, &cmd, BLK_MQ_REQ_NOWAIT); 1626db3cbfffSKeith Busch if (IS_ERR(req)) 1627db3cbfffSKeith Busch return PTR_ERR(req); 1628db3cbfffSKeith Busch 1629db3cbfffSKeith Busch req->timeout = ADMIN_TIMEOUT; 1630db3cbfffSKeith Busch req->end_io_data = nvmeq; 1631db3cbfffSKeith Busch 1632db3cbfffSKeith Busch blk_execute_rq_nowait(q, NULL, req, false, 1633db3cbfffSKeith Busch opcode == nvme_admin_delete_cq ? 1634db3cbfffSKeith Busch nvme_del_cq_end : nvme_del_queue_end); 1635db3cbfffSKeith Busch return 0; 1636db3cbfffSKeith Busch } 1637db3cbfffSKeith Busch 1638db3cbfffSKeith Busch static void nvme_disable_io_queues(struct nvme_dev *dev) 1639db3cbfffSKeith Busch { 1640db3cbfffSKeith Busch int pass; 1641db3cbfffSKeith Busch unsigned long timeout; 1642db3cbfffSKeith Busch u8 opcode = nvme_admin_delete_sq; 1643db3cbfffSKeith Busch 1644db3cbfffSKeith Busch for (pass = 0; pass < 2; pass++) { 1645db3cbfffSKeith Busch int sent = 0, i = dev->queue_count - 1; 1646db3cbfffSKeith Busch 1647db3cbfffSKeith Busch reinit_completion(&dev->ioq_wait); 1648db3cbfffSKeith Busch retry: 1649db3cbfffSKeith Busch timeout = ADMIN_TIMEOUT; 1650db3cbfffSKeith Busch for (; i > 0; i--) { 1651db3cbfffSKeith Busch struct nvme_queue *nvmeq = dev->queues[i]; 1652db3cbfffSKeith Busch 1653db3cbfffSKeith Busch if (!pass) 1654db3cbfffSKeith Busch nvme_suspend_queue(nvmeq); 1655db3cbfffSKeith Busch if (nvme_delete_queue(nvmeq, opcode)) 1656db3cbfffSKeith Busch break; 1657db3cbfffSKeith Busch ++sent; 1658db3cbfffSKeith Busch } 1659db3cbfffSKeith Busch while (sent--) { 1660db3cbfffSKeith Busch timeout = wait_for_completion_io_timeout(&dev->ioq_wait, timeout); 1661db3cbfffSKeith Busch if (timeout == 0) 1662db3cbfffSKeith Busch return; 1663db3cbfffSKeith Busch if (i) 1664db3cbfffSKeith Busch goto retry; 1665db3cbfffSKeith Busch } 1666db3cbfffSKeith Busch opcode = nvme_admin_delete_cq; 1667db3cbfffSKeith Busch } 1668db3cbfffSKeith Busch } 1669db3cbfffSKeith Busch 167057dacad5SJay Sternberg /* 167157dacad5SJay Sternberg * Return: error value if an error occurred setting up the queues or calling 167257dacad5SJay Sternberg * Identify Device. 0 if these succeeded, even if adding some of the 167357dacad5SJay Sternberg * namespaces failed. At the moment, these failures are silent. TBD which 167457dacad5SJay Sternberg * failures should be reported. 167557dacad5SJay Sternberg */ 167657dacad5SJay Sternberg static int nvme_dev_add(struct nvme_dev *dev) 167757dacad5SJay Sternberg { 16785bae7f73SChristoph Hellwig if (!dev->ctrl.tagset) { 167957dacad5SJay Sternberg dev->tagset.ops = &nvme_mq_ops; 168057dacad5SJay Sternberg dev->tagset.nr_hw_queues = dev->online_queues - 1; 168157dacad5SJay Sternberg dev->tagset.timeout = NVME_IO_TIMEOUT; 168257dacad5SJay Sternberg dev->tagset.numa_node = dev_to_node(dev->dev); 168357dacad5SJay Sternberg dev->tagset.queue_depth = 168457dacad5SJay Sternberg min_t(int, dev->q_depth, BLK_MQ_MAX_DEPTH) - 1; 168557dacad5SJay Sternberg dev->tagset.cmd_size = nvme_cmd_size(dev); 168657dacad5SJay Sternberg dev->tagset.flags = BLK_MQ_F_SHOULD_MERGE; 168757dacad5SJay Sternberg dev->tagset.driver_data = dev; 168857dacad5SJay Sternberg 168957dacad5SJay Sternberg if (blk_mq_alloc_tag_set(&dev->tagset)) 169057dacad5SJay Sternberg return 0; 16915bae7f73SChristoph Hellwig dev->ctrl.tagset = &dev->tagset; 169257dacad5SJay Sternberg } 169392f7a162SKeith Busch queue_work(nvme_workq, &dev->scan_work); 169457dacad5SJay Sternberg return 0; 169557dacad5SJay Sternberg } 169657dacad5SJay Sternberg 1697b00a726aSKeith Busch static int nvme_pci_enable(struct nvme_dev *dev) 169857dacad5SJay Sternberg { 169957dacad5SJay Sternberg u64 cap; 1700b00a726aSKeith Busch int result = -ENOMEM; 170157dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 170257dacad5SJay Sternberg 170357dacad5SJay Sternberg if (pci_enable_device_mem(pdev)) 170457dacad5SJay Sternberg return result; 170557dacad5SJay Sternberg 170657dacad5SJay Sternberg dev->entry[0].vector = pdev->irq; 170757dacad5SJay Sternberg pci_set_master(pdev); 170857dacad5SJay Sternberg 170957dacad5SJay Sternberg if (dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(64)) && 171057dacad5SJay Sternberg dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(32))) 171157dacad5SJay Sternberg goto disable; 171257dacad5SJay Sternberg 17137a67cbeaSChristoph Hellwig if (readl(dev->bar + NVME_REG_CSTS) == -1) { 171457dacad5SJay Sternberg result = -ENODEV; 1715b00a726aSKeith Busch goto disable; 171657dacad5SJay Sternberg } 171757dacad5SJay Sternberg 171857dacad5SJay Sternberg /* 171957dacad5SJay Sternberg * Some devices don't advertse INTx interrupts, pre-enable a single 172057dacad5SJay Sternberg * MSIX vec for setup. We'll adjust this later. 172157dacad5SJay Sternberg */ 172257dacad5SJay Sternberg if (!pdev->irq) { 172357dacad5SJay Sternberg result = pci_enable_msix(pdev, dev->entry, 1); 172457dacad5SJay Sternberg if (result < 0) 1725b00a726aSKeith Busch goto disable; 172657dacad5SJay Sternberg } 172757dacad5SJay Sternberg 17287a67cbeaSChristoph Hellwig cap = lo_hi_readq(dev->bar + NVME_REG_CAP); 17297a67cbeaSChristoph Hellwig 173057dacad5SJay Sternberg dev->q_depth = min_t(int, NVME_CAP_MQES(cap) + 1, NVME_Q_DEPTH); 173157dacad5SJay Sternberg dev->db_stride = 1 << NVME_CAP_STRIDE(cap); 17327a67cbeaSChristoph Hellwig dev->dbs = dev->bar + 4096; 17331f390c1fSStephan Günther 17341f390c1fSStephan Günther /* 17351f390c1fSStephan Günther * Temporary fix for the Apple controller found in the MacBook8,1 and 17361f390c1fSStephan Günther * some MacBook7,1 to avoid controller resets and data loss. 17371f390c1fSStephan Günther */ 17381f390c1fSStephan Günther if (pdev->vendor == PCI_VENDOR_ID_APPLE && pdev->device == 0x2001) { 17391f390c1fSStephan Günther dev->q_depth = 2; 17401f390c1fSStephan Günther dev_warn(dev->dev, "detected Apple NVMe controller, set " 17411f390c1fSStephan Günther "queue depth=%u to work around controller resets\n", 17421f390c1fSStephan Günther dev->q_depth); 17431f390c1fSStephan Günther } 17441f390c1fSStephan Günther 17457a67cbeaSChristoph Hellwig if (readl(dev->bar + NVME_REG_VS) >= NVME_VS(1, 2)) 174657dacad5SJay Sternberg dev->cmb = nvme_map_cmb(dev); 174757dacad5SJay Sternberg 1748a0a3408eSKeith Busch pci_enable_pcie_error_reporting(pdev); 1749a0a3408eSKeith Busch pci_save_state(pdev); 175057dacad5SJay Sternberg return 0; 175157dacad5SJay Sternberg 175257dacad5SJay Sternberg disable: 175357dacad5SJay Sternberg pci_disable_device(pdev); 175457dacad5SJay Sternberg return result; 175557dacad5SJay Sternberg } 175657dacad5SJay Sternberg 175757dacad5SJay Sternberg static void nvme_dev_unmap(struct nvme_dev *dev) 175857dacad5SJay Sternberg { 1759b00a726aSKeith Busch if (dev->bar) 1760b00a726aSKeith Busch iounmap(dev->bar); 1761b00a726aSKeith Busch pci_release_regions(to_pci_dev(dev->dev)); 1762b00a726aSKeith Busch } 1763b00a726aSKeith Busch 1764b00a726aSKeith Busch static void nvme_pci_disable(struct nvme_dev *dev) 1765b00a726aSKeith Busch { 176657dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 176757dacad5SJay Sternberg 176857dacad5SJay Sternberg if (pdev->msi_enabled) 176957dacad5SJay Sternberg pci_disable_msi(pdev); 177057dacad5SJay Sternberg else if (pdev->msix_enabled) 177157dacad5SJay Sternberg pci_disable_msix(pdev); 177257dacad5SJay Sternberg 1773a0a3408eSKeith Busch if (pci_is_enabled(pdev)) { 1774a0a3408eSKeith Busch pci_disable_pcie_error_reporting(pdev); 177557dacad5SJay Sternberg pci_disable_device(pdev); 177657dacad5SJay Sternberg } 1777a0a3408eSKeith Busch } 177857dacad5SJay Sternberg 17797385014cSChristoph Hellwig static int nvme_dev_list_add(struct nvme_dev *dev) 178057dacad5SJay Sternberg { 17817385014cSChristoph Hellwig bool start_thread = false; 178257dacad5SJay Sternberg 17837385014cSChristoph Hellwig spin_lock(&dev_list_lock); 17847385014cSChristoph Hellwig if (list_empty(&dev_list) && IS_ERR_OR_NULL(nvme_thread)) { 17857385014cSChristoph Hellwig start_thread = true; 17867385014cSChristoph Hellwig nvme_thread = NULL; 178757dacad5SJay Sternberg } 17887385014cSChristoph Hellwig list_add(&dev->node, &dev_list); 17897385014cSChristoph Hellwig spin_unlock(&dev_list_lock); 179057dacad5SJay Sternberg 17917385014cSChristoph Hellwig if (start_thread) { 17927385014cSChristoph Hellwig nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 17937385014cSChristoph Hellwig wake_up_all(&nvme_kthread_wait); 17947385014cSChristoph Hellwig } else 17957385014cSChristoph Hellwig wait_event_killable(nvme_kthread_wait, nvme_thread); 179657dacad5SJay Sternberg 17977385014cSChristoph Hellwig if (IS_ERR_OR_NULL(nvme_thread)) 17987385014cSChristoph Hellwig return nvme_thread ? PTR_ERR(nvme_thread) : -EINTR; 179957dacad5SJay Sternberg 18007385014cSChristoph Hellwig return 0; 180157dacad5SJay Sternberg } 180257dacad5SJay Sternberg 180357dacad5SJay Sternberg /* 180457dacad5SJay Sternberg * Remove the node from the device list and check 180557dacad5SJay Sternberg * for whether or not we need to stop the nvme_thread. 180657dacad5SJay Sternberg */ 180757dacad5SJay Sternberg static void nvme_dev_list_remove(struct nvme_dev *dev) 180857dacad5SJay Sternberg { 180957dacad5SJay Sternberg struct task_struct *tmp = NULL; 181057dacad5SJay Sternberg 181157dacad5SJay Sternberg spin_lock(&dev_list_lock); 181257dacad5SJay Sternberg list_del_init(&dev->node); 181357dacad5SJay Sternberg if (list_empty(&dev_list) && !IS_ERR_OR_NULL(nvme_thread)) { 181457dacad5SJay Sternberg tmp = nvme_thread; 181557dacad5SJay Sternberg nvme_thread = NULL; 181657dacad5SJay Sternberg } 181757dacad5SJay Sternberg spin_unlock(&dev_list_lock); 181857dacad5SJay Sternberg 181957dacad5SJay Sternberg if (tmp) 182057dacad5SJay Sternberg kthread_stop(tmp); 182157dacad5SJay Sternberg } 182257dacad5SJay Sternberg 1823a5cdb68cSKeith Busch static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown) 182457dacad5SJay Sternberg { 182557dacad5SJay Sternberg int i; 182657dacad5SJay Sternberg u32 csts = -1; 182757dacad5SJay Sternberg 182857dacad5SJay Sternberg nvme_dev_list_remove(dev); 182957dacad5SJay Sternberg 183077bf25eaSKeith Busch mutex_lock(&dev->shutdown_lock); 1831b00a726aSKeith Busch if (pci_is_enabled(to_pci_dev(dev->dev))) { 183225646264SKeith Busch nvme_stop_queues(&dev->ctrl); 18337a67cbeaSChristoph Hellwig csts = readl(dev->bar + NVME_REG_CSTS); 183457dacad5SJay Sternberg } 183557dacad5SJay Sternberg if (csts & NVME_CSTS_CFS || !(csts & NVME_CSTS_RDY)) { 183657dacad5SJay Sternberg for (i = dev->queue_count - 1; i >= 0; i--) { 183757dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 183857dacad5SJay Sternberg nvme_suspend_queue(nvmeq); 183957dacad5SJay Sternberg } 184057dacad5SJay Sternberg } else { 184157dacad5SJay Sternberg nvme_disable_io_queues(dev); 1842a5cdb68cSKeith Busch nvme_disable_admin_queue(dev, shutdown); 184357dacad5SJay Sternberg } 1844b00a726aSKeith Busch nvme_pci_disable(dev); 184557dacad5SJay Sternberg 184657dacad5SJay Sternberg for (i = dev->queue_count - 1; i >= 0; i--) 184757dacad5SJay Sternberg nvme_clear_queue(dev->queues[i]); 184877bf25eaSKeith Busch mutex_unlock(&dev->shutdown_lock); 184957dacad5SJay Sternberg } 185057dacad5SJay Sternberg 185157dacad5SJay Sternberg static int nvme_setup_prp_pools(struct nvme_dev *dev) 185257dacad5SJay Sternberg { 185357dacad5SJay Sternberg dev->prp_page_pool = dma_pool_create("prp list page", dev->dev, 185457dacad5SJay Sternberg PAGE_SIZE, PAGE_SIZE, 0); 185557dacad5SJay Sternberg if (!dev->prp_page_pool) 185657dacad5SJay Sternberg return -ENOMEM; 185757dacad5SJay Sternberg 185857dacad5SJay Sternberg /* Optimisation for I/Os between 4k and 128k */ 185957dacad5SJay Sternberg dev->prp_small_pool = dma_pool_create("prp list 256", dev->dev, 186057dacad5SJay Sternberg 256, 256, 0); 186157dacad5SJay Sternberg if (!dev->prp_small_pool) { 186257dacad5SJay Sternberg dma_pool_destroy(dev->prp_page_pool); 186357dacad5SJay Sternberg return -ENOMEM; 186457dacad5SJay Sternberg } 186557dacad5SJay Sternberg return 0; 186657dacad5SJay Sternberg } 186757dacad5SJay Sternberg 186857dacad5SJay Sternberg static void nvme_release_prp_pools(struct nvme_dev *dev) 186957dacad5SJay Sternberg { 187057dacad5SJay Sternberg dma_pool_destroy(dev->prp_page_pool); 187157dacad5SJay Sternberg dma_pool_destroy(dev->prp_small_pool); 187257dacad5SJay Sternberg } 187357dacad5SJay Sternberg 18741673f1f0SChristoph Hellwig static void nvme_pci_free_ctrl(struct nvme_ctrl *ctrl) 187557dacad5SJay Sternberg { 18761673f1f0SChristoph Hellwig struct nvme_dev *dev = to_nvme_dev(ctrl); 187757dacad5SJay Sternberg 187857dacad5SJay Sternberg put_device(dev->dev); 187957dacad5SJay Sternberg if (dev->tagset.tags) 188057dacad5SJay Sternberg blk_mq_free_tag_set(&dev->tagset); 18811c63dc66SChristoph Hellwig if (dev->ctrl.admin_q) 18821c63dc66SChristoph Hellwig blk_put_queue(dev->ctrl.admin_q); 188357dacad5SJay Sternberg kfree(dev->queues); 188457dacad5SJay Sternberg kfree(dev->entry); 188557dacad5SJay Sternberg kfree(dev); 188657dacad5SJay Sternberg } 188757dacad5SJay Sternberg 1888fd634f41SChristoph Hellwig static void nvme_reset_work(struct work_struct *work) 188957dacad5SJay Sternberg { 1890fd634f41SChristoph Hellwig struct nvme_dev *dev = container_of(work, struct nvme_dev, reset_work); 189157dacad5SJay Sternberg int result; 189257dacad5SJay Sternberg 1893fd634f41SChristoph Hellwig if (WARN_ON(test_bit(NVME_CTRL_RESETTING, &dev->flags))) 1894fd634f41SChristoph Hellwig goto out; 1895fd634f41SChristoph Hellwig 1896fd634f41SChristoph Hellwig /* 1897fd634f41SChristoph Hellwig * If we're called to reset a live controller first shut it down before 1898fd634f41SChristoph Hellwig * moving on. 1899fd634f41SChristoph Hellwig */ 1900b00a726aSKeith Busch if (dev->ctrl.ctrl_config & NVME_CC_ENABLE) 1901a5cdb68cSKeith Busch nvme_dev_disable(dev, false); 1902fd634f41SChristoph Hellwig 1903fd634f41SChristoph Hellwig set_bit(NVME_CTRL_RESETTING, &dev->flags); 1904fd634f41SChristoph Hellwig 1905b00a726aSKeith Busch result = nvme_pci_enable(dev); 190657dacad5SJay Sternberg if (result) 190757dacad5SJay Sternberg goto out; 190857dacad5SJay Sternberg 190957dacad5SJay Sternberg result = nvme_configure_admin_queue(dev); 191057dacad5SJay Sternberg if (result) 191157dacad5SJay Sternberg goto unmap; 191257dacad5SJay Sternberg 191357dacad5SJay Sternberg nvme_init_queue(dev->queues[0], 0); 191457dacad5SJay Sternberg result = nvme_alloc_admin_tags(dev); 191557dacad5SJay Sternberg if (result) 191657dacad5SJay Sternberg goto disable; 191757dacad5SJay Sternberg 1918ce4541f4SChristoph Hellwig result = nvme_init_identify(&dev->ctrl); 1919ce4541f4SChristoph Hellwig if (result) 1920ce4541f4SChristoph Hellwig goto free_tags; 1921ce4541f4SChristoph Hellwig 192257dacad5SJay Sternberg result = nvme_setup_io_queues(dev); 192357dacad5SJay Sternberg if (result) 192457dacad5SJay Sternberg goto free_tags; 192557dacad5SJay Sternberg 1926adf68f21SChristoph Hellwig dev->ctrl.event_limit = NVME_NR_AEN_COMMANDS; 192757dacad5SJay Sternberg 19287385014cSChristoph Hellwig result = nvme_dev_list_add(dev); 19297385014cSChristoph Hellwig if (result) 19307385014cSChristoph Hellwig goto remove; 193157dacad5SJay Sternberg 193257dacad5SJay Sternberg /* 193357dacad5SJay Sternberg * Keep the controller around but remove all namespaces if we don't have 193457dacad5SJay Sternberg * any working I/O queue. 193557dacad5SJay Sternberg */ 193657dacad5SJay Sternberg if (dev->online_queues < 2) { 193757dacad5SJay Sternberg dev_warn(dev->dev, "IO queues not created\n"); 19385bae7f73SChristoph Hellwig nvme_remove_namespaces(&dev->ctrl); 193957dacad5SJay Sternberg } else { 194025646264SKeith Busch nvme_start_queues(&dev->ctrl); 194157dacad5SJay Sternberg nvme_dev_add(dev); 194257dacad5SJay Sternberg } 194357dacad5SJay Sternberg 1944fd634f41SChristoph Hellwig clear_bit(NVME_CTRL_RESETTING, &dev->flags); 194557dacad5SJay Sternberg return; 194657dacad5SJay Sternberg 19477385014cSChristoph Hellwig remove: 19487385014cSChristoph Hellwig nvme_dev_list_remove(dev); 194957dacad5SJay Sternberg free_tags: 195057dacad5SJay Sternberg nvme_dev_remove_admin(dev); 19511c63dc66SChristoph Hellwig blk_put_queue(dev->ctrl.admin_q); 19521c63dc66SChristoph Hellwig dev->ctrl.admin_q = NULL; 195357dacad5SJay Sternberg dev->queues[0]->tags = NULL; 195457dacad5SJay Sternberg disable: 1955a5cdb68cSKeith Busch nvme_disable_admin_queue(dev, false); 195657dacad5SJay Sternberg unmap: 195757dacad5SJay Sternberg nvme_dev_unmap(dev); 195857dacad5SJay Sternberg out: 19595c8809e6SChristoph Hellwig nvme_remove_dead_ctrl(dev); 196057dacad5SJay Sternberg } 196157dacad5SJay Sternberg 19625c8809e6SChristoph Hellwig static void nvme_remove_dead_ctrl_work(struct work_struct *work) 196357dacad5SJay Sternberg { 19645c8809e6SChristoph Hellwig struct nvme_dev *dev = container_of(work, struct nvme_dev, remove_work); 196557dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 196657dacad5SJay Sternberg 196757dacad5SJay Sternberg if (pci_get_drvdata(pdev)) 196857dacad5SJay Sternberg pci_stop_and_remove_bus_device_locked(pdev); 19691673f1f0SChristoph Hellwig nvme_put_ctrl(&dev->ctrl); 197057dacad5SJay Sternberg } 197157dacad5SJay Sternberg 19725c8809e6SChristoph Hellwig static void nvme_remove_dead_ctrl(struct nvme_dev *dev) 197357dacad5SJay Sternberg { 19745c8809e6SChristoph Hellwig dev_warn(dev->dev, "Removing after probe failure\n"); 19751673f1f0SChristoph Hellwig kref_get(&dev->ctrl.kref); 19765c8809e6SChristoph Hellwig if (!schedule_work(&dev->remove_work)) 19771673f1f0SChristoph Hellwig nvme_put_ctrl(&dev->ctrl); 197857dacad5SJay Sternberg } 197957dacad5SJay Sternberg 198057dacad5SJay Sternberg static int nvme_reset(struct nvme_dev *dev) 198157dacad5SJay Sternberg { 19821c63dc66SChristoph Hellwig if (!dev->ctrl.admin_q || blk_queue_dying(dev->ctrl.admin_q)) 198357dacad5SJay Sternberg return -ENODEV; 198457dacad5SJay Sternberg 1985846cc05fSChristoph Hellwig if (!queue_work(nvme_workq, &dev->reset_work)) 1986846cc05fSChristoph Hellwig return -EBUSY; 198757dacad5SJay Sternberg 198857dacad5SJay Sternberg flush_work(&dev->reset_work); 198957dacad5SJay Sternberg return 0; 199057dacad5SJay Sternberg } 199157dacad5SJay Sternberg 19921c63dc66SChristoph Hellwig static int nvme_pci_reg_read32(struct nvme_ctrl *ctrl, u32 off, u32 *val) 199357dacad5SJay Sternberg { 19941c63dc66SChristoph Hellwig *val = readl(to_nvme_dev(ctrl)->bar + off); 19951c63dc66SChristoph Hellwig return 0; 199657dacad5SJay Sternberg } 19971c63dc66SChristoph Hellwig 19985fd4ce1bSChristoph Hellwig static int nvme_pci_reg_write32(struct nvme_ctrl *ctrl, u32 off, u32 val) 19995fd4ce1bSChristoph Hellwig { 20005fd4ce1bSChristoph Hellwig writel(val, to_nvme_dev(ctrl)->bar + off); 20015fd4ce1bSChristoph Hellwig return 0; 20025fd4ce1bSChristoph Hellwig } 20035fd4ce1bSChristoph Hellwig 20047fd8930fSChristoph Hellwig static int nvme_pci_reg_read64(struct nvme_ctrl *ctrl, u32 off, u64 *val) 20057fd8930fSChristoph Hellwig { 20067fd8930fSChristoph Hellwig *val = readq(to_nvme_dev(ctrl)->bar + off); 20077fd8930fSChristoph Hellwig return 0; 20087fd8930fSChristoph Hellwig } 20097fd8930fSChristoph Hellwig 20105bae7f73SChristoph Hellwig static bool nvme_pci_io_incapable(struct nvme_ctrl *ctrl) 20115bae7f73SChristoph Hellwig { 20125bae7f73SChristoph Hellwig struct nvme_dev *dev = to_nvme_dev(ctrl); 20135bae7f73SChristoph Hellwig 20145bae7f73SChristoph Hellwig return !dev->bar || dev->online_queues < 2; 20155bae7f73SChristoph Hellwig } 20165bae7f73SChristoph Hellwig 2017f3ca80fcSChristoph Hellwig static int nvme_pci_reset_ctrl(struct nvme_ctrl *ctrl) 2018f3ca80fcSChristoph Hellwig { 2019f3ca80fcSChristoph Hellwig return nvme_reset(to_nvme_dev(ctrl)); 2020f3ca80fcSChristoph Hellwig } 2021f3ca80fcSChristoph Hellwig 20221c63dc66SChristoph Hellwig static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = { 20231c63dc66SChristoph Hellwig .reg_read32 = nvme_pci_reg_read32, 20245fd4ce1bSChristoph Hellwig .reg_write32 = nvme_pci_reg_write32, 20257fd8930fSChristoph Hellwig .reg_read64 = nvme_pci_reg_read64, 20265bae7f73SChristoph Hellwig .io_incapable = nvme_pci_io_incapable, 2027f3ca80fcSChristoph Hellwig .reset_ctrl = nvme_pci_reset_ctrl, 20281673f1f0SChristoph Hellwig .free_ctrl = nvme_pci_free_ctrl, 20291c63dc66SChristoph Hellwig }; 203057dacad5SJay Sternberg 2031b00a726aSKeith Busch static int nvme_dev_map(struct nvme_dev *dev) 2032b00a726aSKeith Busch { 2033b00a726aSKeith Busch int bars; 2034b00a726aSKeith Busch struct pci_dev *pdev = to_pci_dev(dev->dev); 2035b00a726aSKeith Busch 2036b00a726aSKeith Busch bars = pci_select_bars(pdev, IORESOURCE_MEM); 2037b00a726aSKeith Busch if (!bars) 2038b00a726aSKeith Busch return -ENODEV; 2039b00a726aSKeith Busch if (pci_request_selected_regions(pdev, bars, "nvme")) 2040b00a726aSKeith Busch return -ENODEV; 2041b00a726aSKeith Busch 2042b00a726aSKeith Busch dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 2043b00a726aSKeith Busch if (!dev->bar) 2044b00a726aSKeith Busch goto release; 2045b00a726aSKeith Busch 2046b00a726aSKeith Busch return 0; 2047b00a726aSKeith Busch release: 2048b00a726aSKeith Busch pci_release_regions(pdev); 2049b00a726aSKeith Busch return -ENODEV; 2050b00a726aSKeith Busch } 2051b00a726aSKeith Busch 205257dacad5SJay Sternberg static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) 205357dacad5SJay Sternberg { 205457dacad5SJay Sternberg int node, result = -ENOMEM; 205557dacad5SJay Sternberg struct nvme_dev *dev; 205657dacad5SJay Sternberg 205757dacad5SJay Sternberg node = dev_to_node(&pdev->dev); 205857dacad5SJay Sternberg if (node == NUMA_NO_NODE) 205957dacad5SJay Sternberg set_dev_node(&pdev->dev, 0); 206057dacad5SJay Sternberg 206157dacad5SJay Sternberg dev = kzalloc_node(sizeof(*dev), GFP_KERNEL, node); 206257dacad5SJay Sternberg if (!dev) 206357dacad5SJay Sternberg return -ENOMEM; 206457dacad5SJay Sternberg dev->entry = kzalloc_node(num_possible_cpus() * sizeof(*dev->entry), 206557dacad5SJay Sternberg GFP_KERNEL, node); 206657dacad5SJay Sternberg if (!dev->entry) 206757dacad5SJay Sternberg goto free; 206857dacad5SJay Sternberg dev->queues = kzalloc_node((num_possible_cpus() + 1) * sizeof(void *), 206957dacad5SJay Sternberg GFP_KERNEL, node); 207057dacad5SJay Sternberg if (!dev->queues) 207157dacad5SJay Sternberg goto free; 207257dacad5SJay Sternberg 207357dacad5SJay Sternberg dev->dev = get_device(&pdev->dev); 207457dacad5SJay Sternberg pci_set_drvdata(pdev, dev); 207557dacad5SJay Sternberg 2076b00a726aSKeith Busch result = nvme_dev_map(dev); 2077b00a726aSKeith Busch if (result) 2078b00a726aSKeith Busch goto free; 2079b00a726aSKeith Busch 208057dacad5SJay Sternberg INIT_LIST_HEAD(&dev->node); 208157dacad5SJay Sternberg INIT_WORK(&dev->scan_work, nvme_dev_scan); 2082f3ca80fcSChristoph Hellwig INIT_WORK(&dev->reset_work, nvme_reset_work); 20835c8809e6SChristoph Hellwig INIT_WORK(&dev->remove_work, nvme_remove_dead_ctrl_work); 208477bf25eaSKeith Busch mutex_init(&dev->shutdown_lock); 2085db3cbfffSKeith Busch init_completion(&dev->ioq_wait); 2086f3ca80fcSChristoph Hellwig 2087f3ca80fcSChristoph Hellwig result = nvme_setup_prp_pools(dev); 2088f3ca80fcSChristoph Hellwig if (result) 2089f3ca80fcSChristoph Hellwig goto put_pci; 2090f3ca80fcSChristoph Hellwig 2091f3ca80fcSChristoph Hellwig result = nvme_init_ctrl(&dev->ctrl, &pdev->dev, &nvme_pci_ctrl_ops, 2092f3ca80fcSChristoph Hellwig id->driver_data); 2093f3ca80fcSChristoph Hellwig if (result) 2094f3ca80fcSChristoph Hellwig goto release_pools; 2095f3ca80fcSChristoph Hellwig 209692f7a162SKeith Busch queue_work(nvme_workq, &dev->reset_work); 209757dacad5SJay Sternberg return 0; 209857dacad5SJay Sternberg 209957dacad5SJay Sternberg release_pools: 210057dacad5SJay Sternberg nvme_release_prp_pools(dev); 210157dacad5SJay Sternberg put_pci: 210257dacad5SJay Sternberg put_device(dev->dev); 2103b00a726aSKeith Busch nvme_dev_unmap(dev); 210457dacad5SJay Sternberg free: 210557dacad5SJay Sternberg kfree(dev->queues); 210657dacad5SJay Sternberg kfree(dev->entry); 210757dacad5SJay Sternberg kfree(dev); 210857dacad5SJay Sternberg return result; 210957dacad5SJay Sternberg } 211057dacad5SJay Sternberg 211157dacad5SJay Sternberg static void nvme_reset_notify(struct pci_dev *pdev, bool prepare) 211257dacad5SJay Sternberg { 211357dacad5SJay Sternberg struct nvme_dev *dev = pci_get_drvdata(pdev); 211457dacad5SJay Sternberg 211557dacad5SJay Sternberg if (prepare) 2116a5cdb68cSKeith Busch nvme_dev_disable(dev, false); 211757dacad5SJay Sternberg else 211892f7a162SKeith Busch queue_work(nvme_workq, &dev->reset_work); 211957dacad5SJay Sternberg } 212057dacad5SJay Sternberg 212157dacad5SJay Sternberg static void nvme_shutdown(struct pci_dev *pdev) 212257dacad5SJay Sternberg { 212357dacad5SJay Sternberg struct nvme_dev *dev = pci_get_drvdata(pdev); 2124a5cdb68cSKeith Busch nvme_dev_disable(dev, true); 212557dacad5SJay Sternberg } 212657dacad5SJay Sternberg 212757dacad5SJay Sternberg static void nvme_remove(struct pci_dev *pdev) 212857dacad5SJay Sternberg { 212957dacad5SJay Sternberg struct nvme_dev *dev = pci_get_drvdata(pdev); 213057dacad5SJay Sternberg 213157dacad5SJay Sternberg pci_set_drvdata(pdev, NULL); 213257dacad5SJay Sternberg flush_work(&dev->scan_work); 21335bae7f73SChristoph Hellwig nvme_remove_namespaces(&dev->ctrl); 213453029b04SKeith Busch nvme_uninit_ctrl(&dev->ctrl); 2135a5cdb68cSKeith Busch nvme_dev_disable(dev, true); 2136ff23a2a1SKeith Busch flush_work(&dev->reset_work); 213757dacad5SJay Sternberg nvme_dev_remove_admin(dev); 213857dacad5SJay Sternberg nvme_free_queues(dev, 0); 213957dacad5SJay Sternberg nvme_release_cmb(dev); 214057dacad5SJay Sternberg nvme_release_prp_pools(dev); 2141b00a726aSKeith Busch nvme_dev_unmap(dev); 21421673f1f0SChristoph Hellwig nvme_put_ctrl(&dev->ctrl); 214357dacad5SJay Sternberg } 214457dacad5SJay Sternberg 214557dacad5SJay Sternberg #ifdef CONFIG_PM_SLEEP 214657dacad5SJay Sternberg static int nvme_suspend(struct device *dev) 214757dacad5SJay Sternberg { 214857dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev); 214957dacad5SJay Sternberg struct nvme_dev *ndev = pci_get_drvdata(pdev); 215057dacad5SJay Sternberg 2151a5cdb68cSKeith Busch nvme_dev_disable(ndev, true); 215257dacad5SJay Sternberg return 0; 215357dacad5SJay Sternberg } 215457dacad5SJay Sternberg 215557dacad5SJay Sternberg static int nvme_resume(struct device *dev) 215657dacad5SJay Sternberg { 215757dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev); 215857dacad5SJay Sternberg struct nvme_dev *ndev = pci_get_drvdata(pdev); 215957dacad5SJay Sternberg 216092f7a162SKeith Busch queue_work(nvme_workq, &ndev->reset_work); 216157dacad5SJay Sternberg return 0; 216257dacad5SJay Sternberg } 216357dacad5SJay Sternberg #endif 216457dacad5SJay Sternberg 216557dacad5SJay Sternberg static SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume); 216657dacad5SJay Sternberg 2167a0a3408eSKeith Busch static pci_ers_result_t nvme_error_detected(struct pci_dev *pdev, 2168a0a3408eSKeith Busch pci_channel_state_t state) 2169a0a3408eSKeith Busch { 2170a0a3408eSKeith Busch struct nvme_dev *dev = pci_get_drvdata(pdev); 2171a0a3408eSKeith Busch 2172a0a3408eSKeith Busch /* 2173a0a3408eSKeith Busch * A frozen channel requires a reset. When detected, this method will 2174a0a3408eSKeith Busch * shutdown the controller to quiesce. The controller will be restarted 2175a0a3408eSKeith Busch * after the slot reset through driver's slot_reset callback. 2176a0a3408eSKeith Busch */ 2177a0a3408eSKeith Busch dev_warn(&pdev->dev, "error detected: state:%d\n", state); 2178a0a3408eSKeith Busch switch (state) { 2179a0a3408eSKeith Busch case pci_channel_io_normal: 2180a0a3408eSKeith Busch return PCI_ERS_RESULT_CAN_RECOVER; 2181a0a3408eSKeith Busch case pci_channel_io_frozen: 2182a5cdb68cSKeith Busch nvme_dev_disable(dev, false); 2183a0a3408eSKeith Busch return PCI_ERS_RESULT_NEED_RESET; 2184a0a3408eSKeith Busch case pci_channel_io_perm_failure: 2185a0a3408eSKeith Busch return PCI_ERS_RESULT_DISCONNECT; 2186a0a3408eSKeith Busch } 2187a0a3408eSKeith Busch return PCI_ERS_RESULT_NEED_RESET; 2188a0a3408eSKeith Busch } 2189a0a3408eSKeith Busch 2190a0a3408eSKeith Busch static pci_ers_result_t nvme_slot_reset(struct pci_dev *pdev) 2191a0a3408eSKeith Busch { 2192a0a3408eSKeith Busch struct nvme_dev *dev = pci_get_drvdata(pdev); 2193a0a3408eSKeith Busch 2194a0a3408eSKeith Busch dev_info(&pdev->dev, "restart after slot reset\n"); 2195a0a3408eSKeith Busch pci_restore_state(pdev); 2196a0a3408eSKeith Busch queue_work(nvme_workq, &dev->reset_work); 2197a0a3408eSKeith Busch return PCI_ERS_RESULT_RECOVERED; 2198a0a3408eSKeith Busch } 2199a0a3408eSKeith Busch 2200a0a3408eSKeith Busch static void nvme_error_resume(struct pci_dev *pdev) 2201a0a3408eSKeith Busch { 2202a0a3408eSKeith Busch pci_cleanup_aer_uncorrect_error_status(pdev); 2203a0a3408eSKeith Busch } 2204a0a3408eSKeith Busch 220557dacad5SJay Sternberg static const struct pci_error_handlers nvme_err_handler = { 220657dacad5SJay Sternberg .error_detected = nvme_error_detected, 220757dacad5SJay Sternberg .slot_reset = nvme_slot_reset, 220857dacad5SJay Sternberg .resume = nvme_error_resume, 220957dacad5SJay Sternberg .reset_notify = nvme_reset_notify, 221057dacad5SJay Sternberg }; 221157dacad5SJay Sternberg 221257dacad5SJay Sternberg /* Move to pci_ids.h later */ 221357dacad5SJay Sternberg #define PCI_CLASS_STORAGE_EXPRESS 0x010802 221457dacad5SJay Sternberg 221557dacad5SJay Sternberg static const struct pci_device_id nvme_id_table[] = { 2216106198edSChristoph Hellwig { PCI_VDEVICE(INTEL, 0x0953), 2217106198edSChristoph Hellwig .driver_data = NVME_QUIRK_STRIPE_SIZE, }, 2218540c801cSKeith Busch { PCI_VDEVICE(INTEL, 0x5845), /* Qemu emulated controller */ 2219540c801cSKeith Busch .driver_data = NVME_QUIRK_IDENTIFY_CNS, }, 222057dacad5SJay Sternberg { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 2221c74dc780SStephan Günther { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2001) }, 222257dacad5SJay Sternberg { 0, } 222357dacad5SJay Sternberg }; 222457dacad5SJay Sternberg MODULE_DEVICE_TABLE(pci, nvme_id_table); 222557dacad5SJay Sternberg 222657dacad5SJay Sternberg static struct pci_driver nvme_driver = { 222757dacad5SJay Sternberg .name = "nvme", 222857dacad5SJay Sternberg .id_table = nvme_id_table, 222957dacad5SJay Sternberg .probe = nvme_probe, 223057dacad5SJay Sternberg .remove = nvme_remove, 223157dacad5SJay Sternberg .shutdown = nvme_shutdown, 223257dacad5SJay Sternberg .driver = { 223357dacad5SJay Sternberg .pm = &nvme_dev_pm_ops, 223457dacad5SJay Sternberg }, 223557dacad5SJay Sternberg .err_handler = &nvme_err_handler, 223657dacad5SJay Sternberg }; 223757dacad5SJay Sternberg 223857dacad5SJay Sternberg static int __init nvme_init(void) 223957dacad5SJay Sternberg { 224057dacad5SJay Sternberg int result; 224157dacad5SJay Sternberg 224257dacad5SJay Sternberg init_waitqueue_head(&nvme_kthread_wait); 224357dacad5SJay Sternberg 224492f7a162SKeith Busch nvme_workq = alloc_workqueue("nvme", WQ_UNBOUND | WQ_MEM_RECLAIM, 0); 224557dacad5SJay Sternberg if (!nvme_workq) 224657dacad5SJay Sternberg return -ENOMEM; 224757dacad5SJay Sternberg 22485bae7f73SChristoph Hellwig result = nvme_core_init(); 224957dacad5SJay Sternberg if (result < 0) 225057dacad5SJay Sternberg goto kill_workq; 225157dacad5SJay Sternberg 225257dacad5SJay Sternberg result = pci_register_driver(&nvme_driver); 225357dacad5SJay Sternberg if (result) 2254f3ca80fcSChristoph Hellwig goto core_exit; 225557dacad5SJay Sternberg return 0; 225657dacad5SJay Sternberg 2257f3ca80fcSChristoph Hellwig core_exit: 22585bae7f73SChristoph Hellwig nvme_core_exit(); 225957dacad5SJay Sternberg kill_workq: 226057dacad5SJay Sternberg destroy_workqueue(nvme_workq); 226157dacad5SJay Sternberg return result; 226257dacad5SJay Sternberg } 226357dacad5SJay Sternberg 226457dacad5SJay Sternberg static void __exit nvme_exit(void) 226557dacad5SJay Sternberg { 226657dacad5SJay Sternberg pci_unregister_driver(&nvme_driver); 22675bae7f73SChristoph Hellwig nvme_core_exit(); 226857dacad5SJay Sternberg destroy_workqueue(nvme_workq); 226957dacad5SJay Sternberg BUG_ON(nvme_thread && !IS_ERR(nvme_thread)); 227057dacad5SJay Sternberg _nvme_check_size(); 227157dacad5SJay Sternberg } 227257dacad5SJay Sternberg 227357dacad5SJay Sternberg MODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 227457dacad5SJay Sternberg MODULE_LICENSE("GPL"); 227557dacad5SJay Sternberg MODULE_VERSION("1.0"); 227657dacad5SJay Sternberg module_init(nvme_init); 227757dacad5SJay Sternberg module_exit(nvme_exit); 2278