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 1557dacad5SJay Sternberg #include <linux/bitops.h> 1657dacad5SJay Sternberg #include <linux/blkdev.h> 1757dacad5SJay Sternberg #include <linux/blk-mq.h> 1857dacad5SJay Sternberg #include <linux/cpu.h> 1957dacad5SJay Sternberg #include <linux/delay.h> 2057dacad5SJay Sternberg #include <linux/errno.h> 2157dacad5SJay Sternberg #include <linux/fs.h> 2257dacad5SJay Sternberg #include <linux/genhd.h> 2357dacad5SJay Sternberg #include <linux/hdreg.h> 2457dacad5SJay Sternberg #include <linux/idr.h> 2557dacad5SJay Sternberg #include <linux/init.h> 2657dacad5SJay Sternberg #include <linux/interrupt.h> 2757dacad5SJay Sternberg #include <linux/io.h> 2857dacad5SJay Sternberg #include <linux/kdev_t.h> 2957dacad5SJay Sternberg #include <linux/kthread.h> 3057dacad5SJay Sternberg #include <linux/kernel.h> 3157dacad5SJay Sternberg #include <linux/list_sort.h> 3257dacad5SJay Sternberg #include <linux/mm.h> 3357dacad5SJay Sternberg #include <linux/module.h> 3457dacad5SJay Sternberg #include <linux/moduleparam.h> 3557dacad5SJay Sternberg #include <linux/pci.h> 3657dacad5SJay Sternberg #include <linux/poison.h> 3757dacad5SJay Sternberg #include <linux/ptrace.h> 3857dacad5SJay Sternberg #include <linux/sched.h> 3957dacad5SJay Sternberg #include <linux/slab.h> 4057dacad5SJay Sternberg #include <linux/t10-pi.h> 4157dacad5SJay Sternberg #include <linux/types.h> 421d277a63SKeith Busch #include <linux/pr.h> 4357dacad5SJay Sternberg #include <scsi/sg.h> 449cf5c095SLinus Torvalds #include <linux/io-64-nonatomic-lo-hi.h> 451d277a63SKeith Busch #include <asm/unaligned.h> 4657dacad5SJay Sternberg 4757dacad5SJay Sternberg #include <uapi/linux/nvme_ioctl.h> 4857dacad5SJay Sternberg #include "nvme.h" 4957dacad5SJay Sternberg 5057dacad5SJay Sternberg #define NVME_MINORS (1U << MINORBITS) 5157dacad5SJay Sternberg #define NVME_Q_DEPTH 1024 5257dacad5SJay Sternberg #define NVME_AQ_DEPTH 256 5357dacad5SJay Sternberg #define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) 5457dacad5SJay Sternberg #define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) 5557dacad5SJay Sternberg #define SHUTDOWN_TIMEOUT (shutdown_timeout * HZ) 5657dacad5SJay Sternberg 5721d34711SChristoph Hellwig unsigned char admin_timeout = 60; 5857dacad5SJay Sternberg module_param(admin_timeout, byte, 0644); 5957dacad5SJay Sternberg MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands"); 6057dacad5SJay Sternberg 6157dacad5SJay Sternberg unsigned char nvme_io_timeout = 30; 6257dacad5SJay Sternberg module_param_named(io_timeout, nvme_io_timeout, byte, 0644); 6357dacad5SJay Sternberg MODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O"); 6457dacad5SJay Sternberg 6557dacad5SJay Sternberg static unsigned char shutdown_timeout = 5; 6657dacad5SJay Sternberg module_param(shutdown_timeout, byte, 0644); 6757dacad5SJay Sternberg MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown"); 6857dacad5SJay Sternberg 6957dacad5SJay Sternberg static int nvme_major; 7057dacad5SJay Sternberg module_param(nvme_major, int, 0); 7157dacad5SJay Sternberg 7257dacad5SJay Sternberg static int nvme_char_major; 7357dacad5SJay Sternberg module_param(nvme_char_major, int, 0); 7457dacad5SJay Sternberg 7557dacad5SJay Sternberg static int use_threaded_interrupts; 7657dacad5SJay Sternberg module_param(use_threaded_interrupts, int, 0); 7757dacad5SJay Sternberg 7857dacad5SJay Sternberg static bool use_cmb_sqes = true; 7957dacad5SJay Sternberg module_param(use_cmb_sqes, bool, 0644); 8057dacad5SJay Sternberg MODULE_PARM_DESC(use_cmb_sqes, "use controller's memory buffer for I/O SQes"); 8157dacad5SJay Sternberg 8257dacad5SJay Sternberg static DEFINE_SPINLOCK(dev_list_lock); 8357dacad5SJay Sternberg static LIST_HEAD(dev_list); 8457dacad5SJay Sternberg static struct task_struct *nvme_thread; 8557dacad5SJay Sternberg static struct workqueue_struct *nvme_workq; 8657dacad5SJay Sternberg static wait_queue_head_t nvme_kthread_wait; 8757dacad5SJay Sternberg 8857dacad5SJay Sternberg static struct class *nvme_class; 8957dacad5SJay Sternberg 90*1c63dc66SChristoph Hellwig struct nvme_dev; 91*1c63dc66SChristoph Hellwig struct nvme_queue; 92*1c63dc66SChristoph Hellwig 9357dacad5SJay Sternberg static int __nvme_reset(struct nvme_dev *dev); 9457dacad5SJay Sternberg static int nvme_reset(struct nvme_dev *dev); 95a0fa9647SJens Axboe static void nvme_process_cq(struct nvme_queue *nvmeq); 9657dacad5SJay Sternberg static void nvme_dead_ctrl(struct nvme_dev *dev); 9757dacad5SJay Sternberg 9857dacad5SJay Sternberg struct async_cmd_info { 9957dacad5SJay Sternberg struct kthread_work work; 10057dacad5SJay Sternberg struct kthread_worker *worker; 10157dacad5SJay Sternberg struct request *req; 10257dacad5SJay Sternberg u32 result; 10357dacad5SJay Sternberg int status; 10457dacad5SJay Sternberg void *ctx; 10557dacad5SJay Sternberg }; 10657dacad5SJay Sternberg 10757dacad5SJay Sternberg /* 108*1c63dc66SChristoph Hellwig * Represents an NVM Express device. Each nvme_dev is a PCI function. 109*1c63dc66SChristoph Hellwig */ 110*1c63dc66SChristoph Hellwig struct nvme_dev { 111*1c63dc66SChristoph Hellwig struct list_head node; 112*1c63dc66SChristoph Hellwig struct nvme_queue **queues; 113*1c63dc66SChristoph Hellwig struct blk_mq_tag_set tagset; 114*1c63dc66SChristoph Hellwig struct blk_mq_tag_set admin_tagset; 115*1c63dc66SChristoph Hellwig u32 __iomem *dbs; 116*1c63dc66SChristoph Hellwig struct device *dev; 117*1c63dc66SChristoph Hellwig struct dma_pool *prp_page_pool; 118*1c63dc66SChristoph Hellwig struct dma_pool *prp_small_pool; 119*1c63dc66SChristoph Hellwig unsigned queue_count; 120*1c63dc66SChristoph Hellwig unsigned online_queues; 121*1c63dc66SChristoph Hellwig unsigned max_qid; 122*1c63dc66SChristoph Hellwig int q_depth; 123*1c63dc66SChristoph Hellwig u32 db_stride; 124*1c63dc66SChristoph Hellwig u32 ctrl_config; 125*1c63dc66SChristoph Hellwig struct msix_entry *entry; 126*1c63dc66SChristoph Hellwig void __iomem *bar; 127*1c63dc66SChristoph Hellwig struct list_head namespaces; 128*1c63dc66SChristoph Hellwig struct kref kref; 129*1c63dc66SChristoph Hellwig struct device *device; 130*1c63dc66SChristoph Hellwig struct work_struct reset_work; 131*1c63dc66SChristoph Hellwig struct work_struct probe_work; 132*1c63dc66SChristoph Hellwig struct work_struct scan_work; 133*1c63dc66SChristoph Hellwig bool subsystem; 134*1c63dc66SChristoph Hellwig u32 max_hw_sectors; 135*1c63dc66SChristoph Hellwig u32 stripe_size; 136*1c63dc66SChristoph Hellwig u32 page_size; 137*1c63dc66SChristoph Hellwig void __iomem *cmb; 138*1c63dc66SChristoph Hellwig dma_addr_t cmb_dma_addr; 139*1c63dc66SChristoph Hellwig u64 cmb_size; 140*1c63dc66SChristoph Hellwig u32 cmbsz; 141*1c63dc66SChristoph Hellwig 142*1c63dc66SChristoph Hellwig struct nvme_ctrl ctrl; 143*1c63dc66SChristoph Hellwig }; 144*1c63dc66SChristoph Hellwig 145*1c63dc66SChristoph Hellwig static inline struct nvme_dev *to_nvme_dev(struct nvme_ctrl *ctrl) 146*1c63dc66SChristoph Hellwig { 147*1c63dc66SChristoph Hellwig return container_of(ctrl, struct nvme_dev, ctrl); 148*1c63dc66SChristoph Hellwig } 149*1c63dc66SChristoph Hellwig 150*1c63dc66SChristoph Hellwig /* 15157dacad5SJay Sternberg * An NVM Express queue. Each device has at least two (one for admin 15257dacad5SJay Sternberg * commands and one for I/O commands). 15357dacad5SJay Sternberg */ 15457dacad5SJay Sternberg struct nvme_queue { 15557dacad5SJay Sternberg struct device *q_dmadev; 15657dacad5SJay Sternberg struct nvme_dev *dev; 15757dacad5SJay Sternberg char irqname[24]; /* nvme4294967295-65535\0 */ 15857dacad5SJay Sternberg spinlock_t q_lock; 15957dacad5SJay Sternberg struct nvme_command *sq_cmds; 16057dacad5SJay Sternberg struct nvme_command __iomem *sq_cmds_io; 16157dacad5SJay Sternberg volatile struct nvme_completion *cqes; 16257dacad5SJay Sternberg struct blk_mq_tags **tags; 16357dacad5SJay Sternberg dma_addr_t sq_dma_addr; 16457dacad5SJay Sternberg dma_addr_t cq_dma_addr; 16557dacad5SJay Sternberg u32 __iomem *q_db; 16657dacad5SJay Sternberg u16 q_depth; 16757dacad5SJay Sternberg s16 cq_vector; 16857dacad5SJay Sternberg u16 sq_head; 16957dacad5SJay Sternberg u16 sq_tail; 17057dacad5SJay Sternberg u16 cq_head; 17157dacad5SJay Sternberg u16 qid; 17257dacad5SJay Sternberg u8 cq_phase; 17357dacad5SJay Sternberg u8 cqe_seen; 17457dacad5SJay Sternberg struct async_cmd_info cmdinfo; 17557dacad5SJay Sternberg }; 17657dacad5SJay Sternberg 17757dacad5SJay Sternberg /* 17871bd150cSChristoph Hellwig * The nvme_iod describes the data in an I/O, including the list of PRP 17971bd150cSChristoph Hellwig * entries. You can't see it in this data structure because C doesn't let 18071bd150cSChristoph Hellwig * me express that. Use nvme_alloc_iod to ensure there's enough space 18171bd150cSChristoph Hellwig * allocated to store the PRP list. 18271bd150cSChristoph Hellwig */ 18371bd150cSChristoph Hellwig struct nvme_iod { 18471bd150cSChristoph Hellwig unsigned long private; /* For the use of the submitter of the I/O */ 18571bd150cSChristoph Hellwig int npages; /* In the PRP list. 0 means small pool in use */ 18671bd150cSChristoph Hellwig int offset; /* Of PRP list */ 18771bd150cSChristoph Hellwig int nents; /* Used in scatterlist */ 18871bd150cSChristoph Hellwig int length; /* Of data, in bytes */ 18971bd150cSChristoph Hellwig dma_addr_t first_dma; 19071bd150cSChristoph Hellwig struct scatterlist meta_sg[1]; /* metadata requires single contiguous buffer */ 19171bd150cSChristoph Hellwig struct scatterlist sg[0]; 19271bd150cSChristoph Hellwig }; 19371bd150cSChristoph Hellwig 19471bd150cSChristoph Hellwig /* 19557dacad5SJay Sternberg * Check we didin't inadvertently grow the command struct 19657dacad5SJay Sternberg */ 19757dacad5SJay Sternberg static inline void _nvme_check_size(void) 19857dacad5SJay Sternberg { 19957dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); 20057dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); 20157dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); 20257dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); 20357dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_features) != 64); 20457dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); 20557dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); 20657dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_command) != 64); 20757dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); 20857dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); 20957dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); 21057dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); 21157dacad5SJay Sternberg } 21257dacad5SJay Sternberg 21357dacad5SJay Sternberg typedef void (*nvme_completion_fn)(struct nvme_queue *, void *, 21457dacad5SJay Sternberg struct nvme_completion *); 21557dacad5SJay Sternberg 21657dacad5SJay Sternberg struct nvme_cmd_info { 21757dacad5SJay Sternberg nvme_completion_fn fn; 21857dacad5SJay Sternberg void *ctx; 21957dacad5SJay Sternberg int aborted; 22057dacad5SJay Sternberg struct nvme_queue *nvmeq; 22157dacad5SJay Sternberg struct nvme_iod iod[0]; 22257dacad5SJay Sternberg }; 22357dacad5SJay Sternberg 22457dacad5SJay Sternberg /* 22557dacad5SJay Sternberg * Max size of iod being embedded in the request payload 22657dacad5SJay Sternberg */ 22757dacad5SJay Sternberg #define NVME_INT_PAGES 2 22857dacad5SJay Sternberg #define NVME_INT_BYTES(dev) (NVME_INT_PAGES * (dev)->page_size) 22957dacad5SJay Sternberg #define NVME_INT_MASK 0x01 23057dacad5SJay Sternberg 23157dacad5SJay Sternberg /* 23257dacad5SJay Sternberg * Will slightly overestimate the number of pages needed. This is OK 23357dacad5SJay Sternberg * as it only leads to a small amount of wasted memory for the lifetime of 23457dacad5SJay Sternberg * the I/O. 23557dacad5SJay Sternberg */ 23657dacad5SJay Sternberg static int nvme_npages(unsigned size, struct nvme_dev *dev) 23757dacad5SJay Sternberg { 23857dacad5SJay Sternberg unsigned nprps = DIV_ROUND_UP(size + dev->page_size, dev->page_size); 23957dacad5SJay Sternberg return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); 24057dacad5SJay Sternberg } 24157dacad5SJay Sternberg 24257dacad5SJay Sternberg static unsigned int nvme_cmd_size(struct nvme_dev *dev) 24357dacad5SJay Sternberg { 24457dacad5SJay Sternberg unsigned int ret = sizeof(struct nvme_cmd_info); 24557dacad5SJay Sternberg 24657dacad5SJay Sternberg ret += sizeof(struct nvme_iod); 24757dacad5SJay Sternberg ret += sizeof(__le64 *) * nvme_npages(NVME_INT_BYTES(dev), dev); 24857dacad5SJay Sternberg ret += sizeof(struct scatterlist) * NVME_INT_PAGES; 24957dacad5SJay Sternberg 25057dacad5SJay Sternberg return ret; 25157dacad5SJay Sternberg } 25257dacad5SJay Sternberg 25357dacad5SJay Sternberg static int nvme_admin_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 25457dacad5SJay Sternberg unsigned int hctx_idx) 25557dacad5SJay Sternberg { 25657dacad5SJay Sternberg struct nvme_dev *dev = data; 25757dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[0]; 25857dacad5SJay Sternberg 25957dacad5SJay Sternberg WARN_ON(hctx_idx != 0); 26057dacad5SJay Sternberg WARN_ON(dev->admin_tagset.tags[0] != hctx->tags); 26157dacad5SJay Sternberg WARN_ON(nvmeq->tags); 26257dacad5SJay Sternberg 26357dacad5SJay Sternberg hctx->driver_data = nvmeq; 26457dacad5SJay Sternberg nvmeq->tags = &dev->admin_tagset.tags[0]; 26557dacad5SJay Sternberg return 0; 26657dacad5SJay Sternberg } 26757dacad5SJay Sternberg 26857dacad5SJay Sternberg static void nvme_admin_exit_hctx(struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx) 26957dacad5SJay Sternberg { 27057dacad5SJay Sternberg struct nvme_queue *nvmeq = hctx->driver_data; 27157dacad5SJay Sternberg 27257dacad5SJay Sternberg nvmeq->tags = NULL; 27357dacad5SJay Sternberg } 27457dacad5SJay Sternberg 27557dacad5SJay Sternberg static int nvme_admin_init_request(void *data, struct request *req, 27657dacad5SJay Sternberg unsigned int hctx_idx, unsigned int rq_idx, 27757dacad5SJay Sternberg unsigned int numa_node) 27857dacad5SJay Sternberg { 27957dacad5SJay Sternberg struct nvme_dev *dev = data; 28057dacad5SJay Sternberg struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); 28157dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[0]; 28257dacad5SJay Sternberg 28357dacad5SJay Sternberg BUG_ON(!nvmeq); 28457dacad5SJay Sternberg cmd->nvmeq = nvmeq; 28557dacad5SJay Sternberg return 0; 28657dacad5SJay Sternberg } 28757dacad5SJay Sternberg 28857dacad5SJay Sternberg static int nvme_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 28957dacad5SJay Sternberg unsigned int hctx_idx) 29057dacad5SJay Sternberg { 29157dacad5SJay Sternberg struct nvme_dev *dev = data; 29257dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; 29357dacad5SJay Sternberg 29457dacad5SJay Sternberg if (!nvmeq->tags) 29557dacad5SJay Sternberg nvmeq->tags = &dev->tagset.tags[hctx_idx]; 29657dacad5SJay Sternberg 29757dacad5SJay Sternberg WARN_ON(dev->tagset.tags[hctx_idx] != hctx->tags); 29857dacad5SJay Sternberg hctx->driver_data = nvmeq; 29957dacad5SJay Sternberg return 0; 30057dacad5SJay Sternberg } 30157dacad5SJay Sternberg 30257dacad5SJay Sternberg static int nvme_init_request(void *data, struct request *req, 30357dacad5SJay Sternberg unsigned int hctx_idx, unsigned int rq_idx, 30457dacad5SJay Sternberg unsigned int numa_node) 30557dacad5SJay Sternberg { 30657dacad5SJay Sternberg struct nvme_dev *dev = data; 30757dacad5SJay Sternberg struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); 30857dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; 30957dacad5SJay Sternberg 31057dacad5SJay Sternberg BUG_ON(!nvmeq); 31157dacad5SJay Sternberg cmd->nvmeq = nvmeq; 31257dacad5SJay Sternberg return 0; 31357dacad5SJay Sternberg } 31457dacad5SJay Sternberg 31557dacad5SJay Sternberg static void nvme_set_info(struct nvme_cmd_info *cmd, void *ctx, 31657dacad5SJay Sternberg nvme_completion_fn handler) 31757dacad5SJay Sternberg { 31857dacad5SJay Sternberg cmd->fn = handler; 31957dacad5SJay Sternberg cmd->ctx = ctx; 32057dacad5SJay Sternberg cmd->aborted = 0; 32157dacad5SJay Sternberg blk_mq_start_request(blk_mq_rq_from_pdu(cmd)); 32257dacad5SJay Sternberg } 32357dacad5SJay Sternberg 32457dacad5SJay Sternberg static void *iod_get_private(struct nvme_iod *iod) 32557dacad5SJay Sternberg { 32657dacad5SJay Sternberg return (void *) (iod->private & ~0x1UL); 32757dacad5SJay Sternberg } 32857dacad5SJay Sternberg 32957dacad5SJay Sternberg /* 33057dacad5SJay Sternberg * If bit 0 is set, the iod is embedded in the request payload. 33157dacad5SJay Sternberg */ 33257dacad5SJay Sternberg static bool iod_should_kfree(struct nvme_iod *iod) 33357dacad5SJay Sternberg { 33457dacad5SJay Sternberg return (iod->private & NVME_INT_MASK) == 0; 33557dacad5SJay Sternberg } 33657dacad5SJay Sternberg 33757dacad5SJay Sternberg /* Special values must be less than 0x1000 */ 33857dacad5SJay Sternberg #define CMD_CTX_BASE ((void *)POISON_POINTER_DELTA) 33957dacad5SJay Sternberg #define CMD_CTX_CANCELLED (0x30C + CMD_CTX_BASE) 34057dacad5SJay Sternberg #define CMD_CTX_COMPLETED (0x310 + CMD_CTX_BASE) 34157dacad5SJay Sternberg #define CMD_CTX_INVALID (0x314 + CMD_CTX_BASE) 34257dacad5SJay Sternberg 34357dacad5SJay Sternberg static void special_completion(struct nvme_queue *nvmeq, void *ctx, 34457dacad5SJay Sternberg struct nvme_completion *cqe) 34557dacad5SJay Sternberg { 34657dacad5SJay Sternberg if (ctx == CMD_CTX_CANCELLED) 34757dacad5SJay Sternberg return; 34857dacad5SJay Sternberg if (ctx == CMD_CTX_COMPLETED) { 34957dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, 35057dacad5SJay Sternberg "completed id %d twice on queue %d\n", 35157dacad5SJay Sternberg cqe->command_id, le16_to_cpup(&cqe->sq_id)); 35257dacad5SJay Sternberg return; 35357dacad5SJay Sternberg } 35457dacad5SJay Sternberg if (ctx == CMD_CTX_INVALID) { 35557dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, 35657dacad5SJay Sternberg "invalid id %d completed on queue %d\n", 35757dacad5SJay Sternberg cqe->command_id, le16_to_cpup(&cqe->sq_id)); 35857dacad5SJay Sternberg return; 35957dacad5SJay Sternberg } 36057dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, "Unknown special completion %p\n", ctx); 36157dacad5SJay Sternberg } 36257dacad5SJay Sternberg 36357dacad5SJay Sternberg static void *cancel_cmd_info(struct nvme_cmd_info *cmd, nvme_completion_fn *fn) 36457dacad5SJay Sternberg { 36557dacad5SJay Sternberg void *ctx; 36657dacad5SJay Sternberg 36757dacad5SJay Sternberg if (fn) 36857dacad5SJay Sternberg *fn = cmd->fn; 36957dacad5SJay Sternberg ctx = cmd->ctx; 37057dacad5SJay Sternberg cmd->fn = special_completion; 37157dacad5SJay Sternberg cmd->ctx = CMD_CTX_CANCELLED; 37257dacad5SJay Sternberg return ctx; 37357dacad5SJay Sternberg } 37457dacad5SJay Sternberg 37557dacad5SJay Sternberg static void async_req_completion(struct nvme_queue *nvmeq, void *ctx, 37657dacad5SJay Sternberg struct nvme_completion *cqe) 37757dacad5SJay Sternberg { 37857dacad5SJay Sternberg u32 result = le32_to_cpup(&cqe->result); 37957dacad5SJay Sternberg u16 status = le16_to_cpup(&cqe->status) >> 1; 38057dacad5SJay Sternberg 38157dacad5SJay Sternberg if (status == NVME_SC_SUCCESS || status == NVME_SC_ABORT_REQ) 382*1c63dc66SChristoph Hellwig ++nvmeq->dev->ctrl.event_limit; 38357dacad5SJay Sternberg if (status != NVME_SC_SUCCESS) 38457dacad5SJay Sternberg return; 38557dacad5SJay Sternberg 38657dacad5SJay Sternberg switch (result & 0xff07) { 38757dacad5SJay Sternberg case NVME_AER_NOTICE_NS_CHANGED: 38857dacad5SJay Sternberg dev_info(nvmeq->q_dmadev, "rescanning\n"); 38957dacad5SJay Sternberg schedule_work(&nvmeq->dev->scan_work); 39057dacad5SJay Sternberg default: 39157dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, "async event result %08x\n", result); 39257dacad5SJay Sternberg } 39357dacad5SJay Sternberg } 39457dacad5SJay Sternberg 39557dacad5SJay Sternberg static void abort_completion(struct nvme_queue *nvmeq, void *ctx, 39657dacad5SJay Sternberg struct nvme_completion *cqe) 39757dacad5SJay Sternberg { 39857dacad5SJay Sternberg struct request *req = ctx; 39957dacad5SJay Sternberg 40057dacad5SJay Sternberg u16 status = le16_to_cpup(&cqe->status) >> 1; 40157dacad5SJay Sternberg u32 result = le32_to_cpup(&cqe->result); 40257dacad5SJay Sternberg 40357dacad5SJay Sternberg blk_mq_free_request(req); 40457dacad5SJay Sternberg 40557dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, "Abort status:%x result:%x", status, result); 406*1c63dc66SChristoph Hellwig ++nvmeq->dev->ctrl.abort_limit; 40757dacad5SJay Sternberg } 40857dacad5SJay Sternberg 40957dacad5SJay Sternberg static void async_completion(struct nvme_queue *nvmeq, void *ctx, 41057dacad5SJay Sternberg struct nvme_completion *cqe) 41157dacad5SJay Sternberg { 41257dacad5SJay Sternberg struct async_cmd_info *cmdinfo = ctx; 41357dacad5SJay Sternberg cmdinfo->result = le32_to_cpup(&cqe->result); 41457dacad5SJay Sternberg cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 41557dacad5SJay Sternberg queue_kthread_work(cmdinfo->worker, &cmdinfo->work); 41657dacad5SJay Sternberg blk_mq_free_request(cmdinfo->req); 41757dacad5SJay Sternberg } 41857dacad5SJay Sternberg 41957dacad5SJay Sternberg static inline struct nvme_cmd_info *get_cmd_from_tag(struct nvme_queue *nvmeq, 42057dacad5SJay Sternberg unsigned int tag) 42157dacad5SJay Sternberg { 42257dacad5SJay Sternberg struct request *req = blk_mq_tag_to_rq(*nvmeq->tags, tag); 42357dacad5SJay Sternberg 42457dacad5SJay Sternberg return blk_mq_rq_to_pdu(req); 42557dacad5SJay Sternberg } 42657dacad5SJay Sternberg 42757dacad5SJay Sternberg /* 42857dacad5SJay Sternberg * Called with local interrupts disabled and the q_lock held. May not sleep. 42957dacad5SJay Sternberg */ 43057dacad5SJay Sternberg static void *nvme_finish_cmd(struct nvme_queue *nvmeq, int tag, 43157dacad5SJay Sternberg nvme_completion_fn *fn) 43257dacad5SJay Sternberg { 43357dacad5SJay Sternberg struct nvme_cmd_info *cmd = get_cmd_from_tag(nvmeq, tag); 43457dacad5SJay Sternberg void *ctx; 43557dacad5SJay Sternberg if (tag >= nvmeq->q_depth) { 43657dacad5SJay Sternberg *fn = special_completion; 43757dacad5SJay Sternberg return CMD_CTX_INVALID; 43857dacad5SJay Sternberg } 43957dacad5SJay Sternberg if (fn) 44057dacad5SJay Sternberg *fn = cmd->fn; 44157dacad5SJay Sternberg ctx = cmd->ctx; 44257dacad5SJay Sternberg cmd->fn = special_completion; 44357dacad5SJay Sternberg cmd->ctx = CMD_CTX_COMPLETED; 44457dacad5SJay Sternberg return ctx; 44557dacad5SJay Sternberg } 44657dacad5SJay Sternberg 44757dacad5SJay Sternberg /** 44857dacad5SJay Sternberg * nvme_submit_cmd() - Copy a command into a queue and ring the doorbell 44957dacad5SJay Sternberg * @nvmeq: The queue to use 45057dacad5SJay Sternberg * @cmd: The command to send 45157dacad5SJay Sternberg * 45257dacad5SJay Sternberg * Safe to use from interrupt context 45357dacad5SJay Sternberg */ 45457dacad5SJay Sternberg static void __nvme_submit_cmd(struct nvme_queue *nvmeq, 45557dacad5SJay Sternberg struct nvme_command *cmd) 45657dacad5SJay Sternberg { 45757dacad5SJay Sternberg u16 tail = nvmeq->sq_tail; 45857dacad5SJay Sternberg 45957dacad5SJay Sternberg if (nvmeq->sq_cmds_io) 46057dacad5SJay Sternberg memcpy_toio(&nvmeq->sq_cmds_io[tail], cmd, sizeof(*cmd)); 46157dacad5SJay Sternberg else 46257dacad5SJay Sternberg memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); 46357dacad5SJay Sternberg 46457dacad5SJay Sternberg if (++tail == nvmeq->q_depth) 46557dacad5SJay Sternberg tail = 0; 46657dacad5SJay Sternberg writel(tail, nvmeq->q_db); 46757dacad5SJay Sternberg nvmeq->sq_tail = tail; 46857dacad5SJay Sternberg } 46957dacad5SJay Sternberg 47057dacad5SJay Sternberg static void nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) 47157dacad5SJay Sternberg { 47257dacad5SJay Sternberg unsigned long flags; 47357dacad5SJay Sternberg spin_lock_irqsave(&nvmeq->q_lock, flags); 47457dacad5SJay Sternberg __nvme_submit_cmd(nvmeq, cmd); 47557dacad5SJay Sternberg spin_unlock_irqrestore(&nvmeq->q_lock, flags); 47657dacad5SJay Sternberg } 47757dacad5SJay Sternberg 47857dacad5SJay Sternberg static __le64 **iod_list(struct nvme_iod *iod) 47957dacad5SJay Sternberg { 48057dacad5SJay Sternberg return ((void *)iod) + iod->offset; 48157dacad5SJay Sternberg } 48257dacad5SJay Sternberg 48357dacad5SJay Sternberg static inline void iod_init(struct nvme_iod *iod, unsigned nbytes, 48457dacad5SJay Sternberg unsigned nseg, unsigned long private) 48557dacad5SJay Sternberg { 48657dacad5SJay Sternberg iod->private = private; 48757dacad5SJay Sternberg iod->offset = offsetof(struct nvme_iod, sg[nseg]); 48857dacad5SJay Sternberg iod->npages = -1; 48957dacad5SJay Sternberg iod->length = nbytes; 49057dacad5SJay Sternberg iod->nents = 0; 49157dacad5SJay Sternberg } 49257dacad5SJay Sternberg 49357dacad5SJay Sternberg static struct nvme_iod * 49457dacad5SJay Sternberg __nvme_alloc_iod(unsigned nseg, unsigned bytes, struct nvme_dev *dev, 49557dacad5SJay Sternberg unsigned long priv, gfp_t gfp) 49657dacad5SJay Sternberg { 49757dacad5SJay Sternberg struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + 49857dacad5SJay Sternberg sizeof(__le64 *) * nvme_npages(bytes, dev) + 49957dacad5SJay Sternberg sizeof(struct scatterlist) * nseg, gfp); 50057dacad5SJay Sternberg 50157dacad5SJay Sternberg if (iod) 50257dacad5SJay Sternberg iod_init(iod, bytes, nseg, priv); 50357dacad5SJay Sternberg 50457dacad5SJay Sternberg return iod; 50557dacad5SJay Sternberg } 50657dacad5SJay Sternberg 50757dacad5SJay Sternberg static struct nvme_iod *nvme_alloc_iod(struct request *rq, struct nvme_dev *dev, 50857dacad5SJay Sternberg gfp_t gfp) 50957dacad5SJay Sternberg { 51057dacad5SJay Sternberg unsigned size = !(rq->cmd_flags & REQ_DISCARD) ? blk_rq_bytes(rq) : 51157dacad5SJay Sternberg sizeof(struct nvme_dsm_range); 51257dacad5SJay Sternberg struct nvme_iod *iod; 51357dacad5SJay Sternberg 51457dacad5SJay Sternberg if (rq->nr_phys_segments <= NVME_INT_PAGES && 51557dacad5SJay Sternberg size <= NVME_INT_BYTES(dev)) { 51657dacad5SJay Sternberg struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(rq); 51757dacad5SJay Sternberg 51857dacad5SJay Sternberg iod = cmd->iod; 51957dacad5SJay Sternberg iod_init(iod, size, rq->nr_phys_segments, 52057dacad5SJay Sternberg (unsigned long) rq | NVME_INT_MASK); 52157dacad5SJay Sternberg return iod; 52257dacad5SJay Sternberg } 52357dacad5SJay Sternberg 52457dacad5SJay Sternberg return __nvme_alloc_iod(rq->nr_phys_segments, size, dev, 52557dacad5SJay Sternberg (unsigned long) rq, gfp); 52657dacad5SJay Sternberg } 52757dacad5SJay Sternberg 52857dacad5SJay Sternberg static void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) 52957dacad5SJay Sternberg { 53057dacad5SJay Sternberg const int last_prp = dev->page_size / 8 - 1; 53157dacad5SJay Sternberg int i; 53257dacad5SJay Sternberg __le64 **list = iod_list(iod); 53357dacad5SJay Sternberg dma_addr_t prp_dma = iod->first_dma; 53457dacad5SJay Sternberg 53557dacad5SJay Sternberg if (iod->npages == 0) 53657dacad5SJay Sternberg dma_pool_free(dev->prp_small_pool, list[0], prp_dma); 53757dacad5SJay Sternberg for (i = 0; i < iod->npages; i++) { 53857dacad5SJay Sternberg __le64 *prp_list = list[i]; 53957dacad5SJay Sternberg dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); 54057dacad5SJay Sternberg dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); 54157dacad5SJay Sternberg prp_dma = next_prp_dma; 54257dacad5SJay Sternberg } 54357dacad5SJay Sternberg 54457dacad5SJay Sternberg if (iod_should_kfree(iod)) 54557dacad5SJay Sternberg kfree(iod); 54657dacad5SJay Sternberg } 54757dacad5SJay Sternberg 54857dacad5SJay Sternberg static int nvme_error_status(u16 status) 54957dacad5SJay Sternberg { 55057dacad5SJay Sternberg switch (status & 0x7ff) { 55157dacad5SJay Sternberg case NVME_SC_SUCCESS: 55257dacad5SJay Sternberg return 0; 55357dacad5SJay Sternberg case NVME_SC_CAP_EXCEEDED: 55457dacad5SJay Sternberg return -ENOSPC; 55557dacad5SJay Sternberg default: 55657dacad5SJay Sternberg return -EIO; 55757dacad5SJay Sternberg } 55857dacad5SJay Sternberg } 55957dacad5SJay Sternberg 56057dacad5SJay Sternberg #ifdef CONFIG_BLK_DEV_INTEGRITY 56157dacad5SJay Sternberg static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) 56257dacad5SJay Sternberg { 56357dacad5SJay Sternberg if (be32_to_cpu(pi->ref_tag) == v) 56457dacad5SJay Sternberg pi->ref_tag = cpu_to_be32(p); 56557dacad5SJay Sternberg } 56657dacad5SJay Sternberg 56757dacad5SJay Sternberg static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) 56857dacad5SJay Sternberg { 56957dacad5SJay Sternberg if (be32_to_cpu(pi->ref_tag) == p) 57057dacad5SJay Sternberg pi->ref_tag = cpu_to_be32(v); 57157dacad5SJay Sternberg } 57257dacad5SJay Sternberg 57357dacad5SJay Sternberg /** 57457dacad5SJay Sternberg * nvme_dif_remap - remaps ref tags to bip seed and physical lba 57557dacad5SJay Sternberg * 57657dacad5SJay Sternberg * The virtual start sector is the one that was originally submitted by the 57757dacad5SJay Sternberg * block layer. Due to partitioning, MD/DM cloning, etc. the actual physical 57857dacad5SJay Sternberg * start sector may be different. Remap protection information to match the 57957dacad5SJay Sternberg * physical LBA on writes, and back to the original seed on reads. 58057dacad5SJay Sternberg * 58157dacad5SJay Sternberg * Type 0 and 3 do not have a ref tag, so no remapping required. 58257dacad5SJay Sternberg */ 58357dacad5SJay Sternberg static void nvme_dif_remap(struct request *req, 58457dacad5SJay Sternberg void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) 58557dacad5SJay Sternberg { 58657dacad5SJay Sternberg struct nvme_ns *ns = req->rq_disk->private_data; 58757dacad5SJay Sternberg struct bio_integrity_payload *bip; 58857dacad5SJay Sternberg struct t10_pi_tuple *pi; 58957dacad5SJay Sternberg void *p, *pmap; 59057dacad5SJay Sternberg u32 i, nlb, ts, phys, virt; 59157dacad5SJay Sternberg 59257dacad5SJay Sternberg if (!ns->pi_type || ns->pi_type == NVME_NS_DPS_PI_TYPE3) 59357dacad5SJay Sternberg return; 59457dacad5SJay Sternberg 59557dacad5SJay Sternberg bip = bio_integrity(req->bio); 59657dacad5SJay Sternberg if (!bip) 59757dacad5SJay Sternberg return; 59857dacad5SJay Sternberg 59957dacad5SJay Sternberg pmap = kmap_atomic(bip->bip_vec->bv_page) + bip->bip_vec->bv_offset; 60057dacad5SJay Sternberg 60157dacad5SJay Sternberg p = pmap; 60257dacad5SJay Sternberg virt = bip_get_seed(bip); 60357dacad5SJay Sternberg phys = nvme_block_nr(ns, blk_rq_pos(req)); 60457dacad5SJay Sternberg nlb = (blk_rq_bytes(req) >> ns->lba_shift); 605ac6fc48cSDan Williams ts = ns->disk->queue->integrity.tuple_size; 60657dacad5SJay Sternberg 60757dacad5SJay Sternberg for (i = 0; i < nlb; i++, virt++, phys++) { 60857dacad5SJay Sternberg pi = (struct t10_pi_tuple *)p; 60957dacad5SJay Sternberg dif_swap(phys, virt, pi); 61057dacad5SJay Sternberg p += ts; 61157dacad5SJay Sternberg } 61257dacad5SJay Sternberg kunmap_atomic(pmap); 61357dacad5SJay Sternberg } 61457dacad5SJay Sternberg 61557dacad5SJay Sternberg static void nvme_init_integrity(struct nvme_ns *ns) 61657dacad5SJay Sternberg { 61757dacad5SJay Sternberg struct blk_integrity integrity; 61857dacad5SJay Sternberg 61957dacad5SJay Sternberg switch (ns->pi_type) { 62057dacad5SJay Sternberg case NVME_NS_DPS_PI_TYPE3: 6210f8087ecSMartin K. Petersen integrity.profile = &t10_pi_type3_crc; 62257dacad5SJay Sternberg break; 62357dacad5SJay Sternberg case NVME_NS_DPS_PI_TYPE1: 62457dacad5SJay Sternberg case NVME_NS_DPS_PI_TYPE2: 6250f8087ecSMartin K. Petersen integrity.profile = &t10_pi_type1_crc; 62657dacad5SJay Sternberg break; 62757dacad5SJay Sternberg default: 6284125a09bSDan Williams integrity.profile = NULL; 62957dacad5SJay Sternberg break; 63057dacad5SJay Sternberg } 63157dacad5SJay Sternberg integrity.tuple_size = ns->ms; 63257dacad5SJay Sternberg blk_integrity_register(ns->disk, &integrity); 63357dacad5SJay Sternberg blk_queue_max_integrity_segments(ns->queue, 1); 63457dacad5SJay Sternberg } 63557dacad5SJay Sternberg #else /* CONFIG_BLK_DEV_INTEGRITY */ 63657dacad5SJay Sternberg static void nvme_dif_remap(struct request *req, 63757dacad5SJay Sternberg void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) 63857dacad5SJay Sternberg { 63957dacad5SJay Sternberg } 64057dacad5SJay Sternberg static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) 64157dacad5SJay Sternberg { 64257dacad5SJay Sternberg } 64357dacad5SJay Sternberg static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) 64457dacad5SJay Sternberg { 64557dacad5SJay Sternberg } 64657dacad5SJay Sternberg static void nvme_init_integrity(struct nvme_ns *ns) 64757dacad5SJay Sternberg { 64857dacad5SJay Sternberg } 64957dacad5SJay Sternberg #endif 65057dacad5SJay Sternberg 65157dacad5SJay Sternberg static void req_completion(struct nvme_queue *nvmeq, void *ctx, 65257dacad5SJay Sternberg struct nvme_completion *cqe) 65357dacad5SJay Sternberg { 65457dacad5SJay Sternberg struct nvme_iod *iod = ctx; 65557dacad5SJay Sternberg struct request *req = iod_get_private(iod); 65657dacad5SJay Sternberg struct nvme_cmd_info *cmd_rq = blk_mq_rq_to_pdu(req); 65757dacad5SJay Sternberg u16 status = le16_to_cpup(&cqe->status) >> 1; 658a9aa31cdSLinus Torvalds bool requeue = false; 659ef658fc2SJens Axboe int error = 0; 66057dacad5SJay Sternberg 66157dacad5SJay Sternberg if (unlikely(status)) { 66257dacad5SJay Sternberg if (!(status & NVME_SC_DNR || blk_noretry_request(req)) 66357dacad5SJay Sternberg && (jiffies - req->start_time) < req->timeout) { 66457dacad5SJay Sternberg unsigned long flags; 66557dacad5SJay Sternberg 666a9aa31cdSLinus Torvalds requeue = true; 66757dacad5SJay Sternberg blk_mq_requeue_request(req); 66857dacad5SJay Sternberg spin_lock_irqsave(req->q->queue_lock, flags); 66957dacad5SJay Sternberg if (!blk_queue_stopped(req->q)) 67057dacad5SJay Sternberg blk_mq_kick_requeue_list(req->q); 67157dacad5SJay Sternberg spin_unlock_irqrestore(req->q->queue_lock, flags); 672a9aa31cdSLinus Torvalds goto release_iod; 67357dacad5SJay Sternberg } 67457dacad5SJay Sternberg 67557dacad5SJay Sternberg if (req->cmd_type == REQ_TYPE_DRV_PRIV) { 67657dacad5SJay Sternberg if (cmd_rq->ctx == CMD_CTX_CANCELLED) 6771951feaeSChristoph Hellwig error = -EINTR; 6781951feaeSChristoph Hellwig else 6791951feaeSChristoph Hellwig error = status; 68057dacad5SJay Sternberg } else { 6811951feaeSChristoph Hellwig error = nvme_error_status(status); 68257dacad5SJay Sternberg } 68357dacad5SJay Sternberg } 68457dacad5SJay Sternberg 68557dacad5SJay Sternberg if (req->cmd_type == REQ_TYPE_DRV_PRIV) { 68657dacad5SJay Sternberg u32 result = le32_to_cpup(&cqe->result); 68757dacad5SJay Sternberg req->special = (void *)(uintptr_t)result; 68857dacad5SJay Sternberg } 68957dacad5SJay Sternberg 69057dacad5SJay Sternberg if (cmd_rq->aborted) 69157dacad5SJay Sternberg dev_warn(nvmeq->dev->dev, 69257dacad5SJay Sternberg "completing aborted command with status:%04x\n", 6931951feaeSChristoph Hellwig error); 69457dacad5SJay Sternberg 695a9aa31cdSLinus Torvalds release_iod: 69657dacad5SJay Sternberg if (iod->nents) { 69757dacad5SJay Sternberg dma_unmap_sg(nvmeq->dev->dev, iod->sg, iod->nents, 69857dacad5SJay Sternberg rq_data_dir(req) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 69957dacad5SJay Sternberg if (blk_integrity_rq(req)) { 70057dacad5SJay Sternberg if (!rq_data_dir(req)) 70157dacad5SJay Sternberg nvme_dif_remap(req, nvme_dif_complete); 70257dacad5SJay Sternberg dma_unmap_sg(nvmeq->dev->dev, iod->meta_sg, 1, 70357dacad5SJay Sternberg rq_data_dir(req) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 70457dacad5SJay Sternberg } 70557dacad5SJay Sternberg } 70657dacad5SJay Sternberg nvme_free_iod(nvmeq->dev, iod); 70757dacad5SJay Sternberg 708a9aa31cdSLinus Torvalds if (likely(!requeue)) 7091951feaeSChristoph Hellwig blk_mq_complete_request(req, error); 71057dacad5SJay Sternberg } 71157dacad5SJay Sternberg 71257dacad5SJay Sternberg /* length is in bytes. gfp flags indicates whether we may sleep. */ 71357dacad5SJay Sternberg static int nvme_setup_prps(struct nvme_dev *dev, struct nvme_iod *iod, 71457dacad5SJay Sternberg int total_len, gfp_t gfp) 71557dacad5SJay Sternberg { 71657dacad5SJay Sternberg struct dma_pool *pool; 71757dacad5SJay Sternberg int length = total_len; 71857dacad5SJay Sternberg struct scatterlist *sg = iod->sg; 71957dacad5SJay Sternberg int dma_len = sg_dma_len(sg); 72057dacad5SJay Sternberg u64 dma_addr = sg_dma_address(sg); 72157dacad5SJay Sternberg u32 page_size = dev->page_size; 72257dacad5SJay Sternberg int offset = dma_addr & (page_size - 1); 72357dacad5SJay Sternberg __le64 *prp_list; 72457dacad5SJay Sternberg __le64 **list = iod_list(iod); 72557dacad5SJay Sternberg dma_addr_t prp_dma; 72657dacad5SJay Sternberg int nprps, i; 72757dacad5SJay Sternberg 72857dacad5SJay Sternberg length -= (page_size - offset); 72957dacad5SJay Sternberg if (length <= 0) 73057dacad5SJay Sternberg return total_len; 73157dacad5SJay Sternberg 73257dacad5SJay Sternberg dma_len -= (page_size - offset); 73357dacad5SJay Sternberg if (dma_len) { 73457dacad5SJay Sternberg dma_addr += (page_size - offset); 73557dacad5SJay Sternberg } else { 73657dacad5SJay Sternberg sg = sg_next(sg); 73757dacad5SJay Sternberg dma_addr = sg_dma_address(sg); 73857dacad5SJay Sternberg dma_len = sg_dma_len(sg); 73957dacad5SJay Sternberg } 74057dacad5SJay Sternberg 74157dacad5SJay Sternberg if (length <= page_size) { 74257dacad5SJay Sternberg iod->first_dma = dma_addr; 74357dacad5SJay Sternberg return total_len; 74457dacad5SJay Sternberg } 74557dacad5SJay Sternberg 74657dacad5SJay Sternberg nprps = DIV_ROUND_UP(length, page_size); 74757dacad5SJay Sternberg if (nprps <= (256 / 8)) { 74857dacad5SJay Sternberg pool = dev->prp_small_pool; 74957dacad5SJay Sternberg iod->npages = 0; 75057dacad5SJay Sternberg } else { 75157dacad5SJay Sternberg pool = dev->prp_page_pool; 75257dacad5SJay Sternberg iod->npages = 1; 75357dacad5SJay Sternberg } 75457dacad5SJay Sternberg 75557dacad5SJay Sternberg prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 75657dacad5SJay Sternberg if (!prp_list) { 75757dacad5SJay Sternberg iod->first_dma = dma_addr; 75857dacad5SJay Sternberg iod->npages = -1; 75957dacad5SJay Sternberg return (total_len - length) + page_size; 76057dacad5SJay Sternberg } 76157dacad5SJay Sternberg list[0] = prp_list; 76257dacad5SJay Sternberg iod->first_dma = prp_dma; 76357dacad5SJay Sternberg i = 0; 76457dacad5SJay Sternberg for (;;) { 76557dacad5SJay Sternberg if (i == page_size >> 3) { 76657dacad5SJay Sternberg __le64 *old_prp_list = prp_list; 76757dacad5SJay Sternberg prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 76857dacad5SJay Sternberg if (!prp_list) 76957dacad5SJay Sternberg return total_len - length; 77057dacad5SJay Sternberg list[iod->npages++] = prp_list; 77157dacad5SJay Sternberg prp_list[0] = old_prp_list[i - 1]; 77257dacad5SJay Sternberg old_prp_list[i - 1] = cpu_to_le64(prp_dma); 77357dacad5SJay Sternberg i = 1; 77457dacad5SJay Sternberg } 77557dacad5SJay Sternberg prp_list[i++] = cpu_to_le64(dma_addr); 77657dacad5SJay Sternberg dma_len -= page_size; 77757dacad5SJay Sternberg dma_addr += page_size; 77857dacad5SJay Sternberg length -= page_size; 77957dacad5SJay Sternberg if (length <= 0) 78057dacad5SJay Sternberg break; 78157dacad5SJay Sternberg if (dma_len > 0) 78257dacad5SJay Sternberg continue; 78357dacad5SJay Sternberg BUG_ON(dma_len < 0); 78457dacad5SJay Sternberg sg = sg_next(sg); 78557dacad5SJay Sternberg dma_addr = sg_dma_address(sg); 78657dacad5SJay Sternberg dma_len = sg_dma_len(sg); 78757dacad5SJay Sternberg } 78857dacad5SJay Sternberg 78957dacad5SJay Sternberg return total_len; 79057dacad5SJay Sternberg } 79157dacad5SJay Sternberg 79257dacad5SJay Sternberg static void nvme_submit_priv(struct nvme_queue *nvmeq, struct request *req, 79357dacad5SJay Sternberg struct nvme_iod *iod) 79457dacad5SJay Sternberg { 79557dacad5SJay Sternberg struct nvme_command cmnd; 79657dacad5SJay Sternberg 79757dacad5SJay Sternberg memcpy(&cmnd, req->cmd, sizeof(cmnd)); 79857dacad5SJay Sternberg cmnd.rw.command_id = req->tag; 79957dacad5SJay Sternberg if (req->nr_phys_segments) { 80057dacad5SJay Sternberg cmnd.rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); 80157dacad5SJay Sternberg cmnd.rw.prp2 = cpu_to_le64(iod->first_dma); 80257dacad5SJay Sternberg } 80357dacad5SJay Sternberg 80457dacad5SJay Sternberg __nvme_submit_cmd(nvmeq, &cmnd); 80557dacad5SJay Sternberg } 80657dacad5SJay Sternberg 80757dacad5SJay Sternberg /* 80857dacad5SJay Sternberg * We reuse the small pool to allocate the 16-byte range here as it is not 80957dacad5SJay Sternberg * worth having a special pool for these or additional cases to handle freeing 81057dacad5SJay Sternberg * the iod. 81157dacad5SJay Sternberg */ 81257dacad5SJay Sternberg static void nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, 81357dacad5SJay Sternberg struct request *req, struct nvme_iod *iod) 81457dacad5SJay Sternberg { 81557dacad5SJay Sternberg struct nvme_dsm_range *range = 81657dacad5SJay Sternberg (struct nvme_dsm_range *)iod_list(iod)[0]; 81757dacad5SJay Sternberg struct nvme_command cmnd; 81857dacad5SJay Sternberg 81957dacad5SJay Sternberg range->cattr = cpu_to_le32(0); 82057dacad5SJay Sternberg range->nlb = cpu_to_le32(blk_rq_bytes(req) >> ns->lba_shift); 82157dacad5SJay Sternberg range->slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); 82257dacad5SJay Sternberg 82357dacad5SJay Sternberg memset(&cmnd, 0, sizeof(cmnd)); 82457dacad5SJay Sternberg cmnd.dsm.opcode = nvme_cmd_dsm; 82557dacad5SJay Sternberg cmnd.dsm.command_id = req->tag; 82657dacad5SJay Sternberg cmnd.dsm.nsid = cpu_to_le32(ns->ns_id); 82757dacad5SJay Sternberg cmnd.dsm.prp1 = cpu_to_le64(iod->first_dma); 82857dacad5SJay Sternberg cmnd.dsm.nr = 0; 82957dacad5SJay Sternberg cmnd.dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); 83057dacad5SJay Sternberg 83157dacad5SJay Sternberg __nvme_submit_cmd(nvmeq, &cmnd); 83257dacad5SJay Sternberg } 83357dacad5SJay Sternberg 83457dacad5SJay Sternberg static void nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, 83557dacad5SJay Sternberg int cmdid) 83657dacad5SJay Sternberg { 83757dacad5SJay Sternberg struct nvme_command cmnd; 83857dacad5SJay Sternberg 83957dacad5SJay Sternberg memset(&cmnd, 0, sizeof(cmnd)); 84057dacad5SJay Sternberg cmnd.common.opcode = nvme_cmd_flush; 84157dacad5SJay Sternberg cmnd.common.command_id = cmdid; 84257dacad5SJay Sternberg cmnd.common.nsid = cpu_to_le32(ns->ns_id); 84357dacad5SJay Sternberg 84457dacad5SJay Sternberg __nvme_submit_cmd(nvmeq, &cmnd); 84557dacad5SJay Sternberg } 84657dacad5SJay Sternberg 84757dacad5SJay Sternberg static int nvme_submit_iod(struct nvme_queue *nvmeq, struct nvme_iod *iod, 84857dacad5SJay Sternberg struct nvme_ns *ns) 84957dacad5SJay Sternberg { 85057dacad5SJay Sternberg struct request *req = iod_get_private(iod); 85157dacad5SJay Sternberg struct nvme_command cmnd; 85257dacad5SJay Sternberg u16 control = 0; 85357dacad5SJay Sternberg u32 dsmgmt = 0; 85457dacad5SJay Sternberg 85557dacad5SJay Sternberg if (req->cmd_flags & REQ_FUA) 85657dacad5SJay Sternberg control |= NVME_RW_FUA; 85757dacad5SJay Sternberg if (req->cmd_flags & (REQ_FAILFAST_DEV | REQ_RAHEAD)) 85857dacad5SJay Sternberg control |= NVME_RW_LR; 85957dacad5SJay Sternberg 86057dacad5SJay Sternberg if (req->cmd_flags & REQ_RAHEAD) 86157dacad5SJay Sternberg dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; 86257dacad5SJay Sternberg 86357dacad5SJay Sternberg memset(&cmnd, 0, sizeof(cmnd)); 86457dacad5SJay Sternberg cmnd.rw.opcode = (rq_data_dir(req) ? nvme_cmd_write : nvme_cmd_read); 86557dacad5SJay Sternberg cmnd.rw.command_id = req->tag; 86657dacad5SJay Sternberg cmnd.rw.nsid = cpu_to_le32(ns->ns_id); 86757dacad5SJay Sternberg cmnd.rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); 86857dacad5SJay Sternberg cmnd.rw.prp2 = cpu_to_le64(iod->first_dma); 86957dacad5SJay Sternberg cmnd.rw.slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); 87057dacad5SJay Sternberg cmnd.rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); 87157dacad5SJay Sternberg 87257dacad5SJay Sternberg if (ns->ms) { 87357dacad5SJay Sternberg switch (ns->pi_type) { 87457dacad5SJay Sternberg case NVME_NS_DPS_PI_TYPE3: 87557dacad5SJay Sternberg control |= NVME_RW_PRINFO_PRCHK_GUARD; 87657dacad5SJay Sternberg break; 87757dacad5SJay Sternberg case NVME_NS_DPS_PI_TYPE1: 87857dacad5SJay Sternberg case NVME_NS_DPS_PI_TYPE2: 87957dacad5SJay Sternberg control |= NVME_RW_PRINFO_PRCHK_GUARD | 88057dacad5SJay Sternberg NVME_RW_PRINFO_PRCHK_REF; 88157dacad5SJay Sternberg cmnd.rw.reftag = cpu_to_le32( 88257dacad5SJay Sternberg nvme_block_nr(ns, blk_rq_pos(req))); 88357dacad5SJay Sternberg break; 88457dacad5SJay Sternberg } 88557dacad5SJay Sternberg if (blk_integrity_rq(req)) 88657dacad5SJay Sternberg cmnd.rw.metadata = 88757dacad5SJay Sternberg cpu_to_le64(sg_dma_address(iod->meta_sg)); 88857dacad5SJay Sternberg else 88957dacad5SJay Sternberg control |= NVME_RW_PRINFO_PRACT; 89057dacad5SJay Sternberg } 89157dacad5SJay Sternberg 89257dacad5SJay Sternberg cmnd.rw.control = cpu_to_le16(control); 89357dacad5SJay Sternberg cmnd.rw.dsmgmt = cpu_to_le32(dsmgmt); 89457dacad5SJay Sternberg 89557dacad5SJay Sternberg __nvme_submit_cmd(nvmeq, &cmnd); 89657dacad5SJay Sternberg 89757dacad5SJay Sternberg return 0; 89857dacad5SJay Sternberg } 89957dacad5SJay Sternberg 90057dacad5SJay Sternberg /* 90157dacad5SJay Sternberg * NOTE: ns is NULL when called on the admin queue. 90257dacad5SJay Sternberg */ 90357dacad5SJay Sternberg static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx, 90457dacad5SJay Sternberg const struct blk_mq_queue_data *bd) 90557dacad5SJay Sternberg { 90657dacad5SJay Sternberg struct nvme_ns *ns = hctx->queue->queuedata; 90757dacad5SJay Sternberg struct nvme_queue *nvmeq = hctx->driver_data; 90857dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 90957dacad5SJay Sternberg struct request *req = bd->rq; 91057dacad5SJay Sternberg struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); 91157dacad5SJay Sternberg struct nvme_iod *iod; 91257dacad5SJay Sternberg enum dma_data_direction dma_dir; 91357dacad5SJay Sternberg 91457dacad5SJay Sternberg /* 91557dacad5SJay Sternberg * If formated with metadata, require the block layer provide a buffer 91657dacad5SJay Sternberg * unless this namespace is formated such that the metadata can be 91757dacad5SJay Sternberg * stripped/generated by the controller with PRACT=1. 91857dacad5SJay Sternberg */ 91957dacad5SJay Sternberg if (ns && ns->ms && !blk_integrity_rq(req)) { 92057dacad5SJay Sternberg if (!(ns->pi_type && ns->ms == 8) && 92157dacad5SJay Sternberg req->cmd_type != REQ_TYPE_DRV_PRIV) { 92257dacad5SJay Sternberg blk_mq_complete_request(req, -EFAULT); 92357dacad5SJay Sternberg return BLK_MQ_RQ_QUEUE_OK; 92457dacad5SJay Sternberg } 92557dacad5SJay Sternberg } 92657dacad5SJay Sternberg 92757dacad5SJay Sternberg iod = nvme_alloc_iod(req, dev, GFP_ATOMIC); 92857dacad5SJay Sternberg if (!iod) 92957dacad5SJay Sternberg return BLK_MQ_RQ_QUEUE_BUSY; 93057dacad5SJay Sternberg 93157dacad5SJay Sternberg if (req->cmd_flags & REQ_DISCARD) { 93257dacad5SJay Sternberg void *range; 93357dacad5SJay Sternberg /* 93457dacad5SJay Sternberg * We reuse the small pool to allocate the 16-byte range here 93557dacad5SJay Sternberg * as it is not worth having a special pool for these or 93657dacad5SJay Sternberg * additional cases to handle freeing the iod. 93757dacad5SJay Sternberg */ 93857dacad5SJay Sternberg range = dma_pool_alloc(dev->prp_small_pool, GFP_ATOMIC, 93957dacad5SJay Sternberg &iod->first_dma); 94057dacad5SJay Sternberg if (!range) 94157dacad5SJay Sternberg goto retry_cmd; 94257dacad5SJay Sternberg iod_list(iod)[0] = (__le64 *)range; 94357dacad5SJay Sternberg iod->npages = 0; 94457dacad5SJay Sternberg } else if (req->nr_phys_segments) { 94557dacad5SJay Sternberg dma_dir = rq_data_dir(req) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; 94657dacad5SJay Sternberg 94757dacad5SJay Sternberg sg_init_table(iod->sg, req->nr_phys_segments); 94857dacad5SJay Sternberg iod->nents = blk_rq_map_sg(req->q, req, iod->sg); 94957dacad5SJay Sternberg if (!iod->nents) 95057dacad5SJay Sternberg goto error_cmd; 95157dacad5SJay Sternberg 95257dacad5SJay Sternberg if (!dma_map_sg(nvmeq->q_dmadev, iod->sg, iod->nents, dma_dir)) 95357dacad5SJay Sternberg goto retry_cmd; 95457dacad5SJay Sternberg 95557dacad5SJay Sternberg if (blk_rq_bytes(req) != 95657dacad5SJay Sternberg nvme_setup_prps(dev, iod, blk_rq_bytes(req), GFP_ATOMIC)) { 95757dacad5SJay Sternberg dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); 95857dacad5SJay Sternberg goto retry_cmd; 95957dacad5SJay Sternberg } 96057dacad5SJay Sternberg if (blk_integrity_rq(req)) { 961bf508e91SChristoph Hellwig if (blk_rq_count_integrity_sg(req->q, req->bio) != 1) { 962bf508e91SChristoph Hellwig dma_unmap_sg(dev->dev, iod->sg, iod->nents, 963bf508e91SChristoph Hellwig dma_dir); 96457dacad5SJay Sternberg goto error_cmd; 965bf508e91SChristoph Hellwig } 96657dacad5SJay Sternberg 96757dacad5SJay Sternberg sg_init_table(iod->meta_sg, 1); 96857dacad5SJay Sternberg if (blk_rq_map_integrity_sg( 969bf508e91SChristoph Hellwig req->q, req->bio, iod->meta_sg) != 1) { 970bf508e91SChristoph Hellwig dma_unmap_sg(dev->dev, iod->sg, iod->nents, 971bf508e91SChristoph Hellwig dma_dir); 97257dacad5SJay Sternberg goto error_cmd; 973bf508e91SChristoph Hellwig } 97457dacad5SJay Sternberg 97557dacad5SJay Sternberg if (rq_data_dir(req)) 97657dacad5SJay Sternberg nvme_dif_remap(req, nvme_dif_prep); 97757dacad5SJay Sternberg 978bf508e91SChristoph Hellwig if (!dma_map_sg(nvmeq->q_dmadev, iod->meta_sg, 1, dma_dir)) { 979bf508e91SChristoph Hellwig dma_unmap_sg(dev->dev, iod->sg, iod->nents, 980bf508e91SChristoph Hellwig dma_dir); 98157dacad5SJay Sternberg goto error_cmd; 98257dacad5SJay Sternberg } 98357dacad5SJay Sternberg } 984bf508e91SChristoph Hellwig } 98557dacad5SJay Sternberg 98657dacad5SJay Sternberg nvme_set_info(cmd, iod, req_completion); 98757dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 98857dacad5SJay Sternberg if (req->cmd_type == REQ_TYPE_DRV_PRIV) 98957dacad5SJay Sternberg nvme_submit_priv(nvmeq, req, iod); 99057dacad5SJay Sternberg else if (req->cmd_flags & REQ_DISCARD) 99157dacad5SJay Sternberg nvme_submit_discard(nvmeq, ns, req, iod); 99257dacad5SJay Sternberg else if (req->cmd_flags & REQ_FLUSH) 99357dacad5SJay Sternberg nvme_submit_flush(nvmeq, ns, req->tag); 99457dacad5SJay Sternberg else 99557dacad5SJay Sternberg nvme_submit_iod(nvmeq, iod, ns); 99657dacad5SJay Sternberg 99757dacad5SJay Sternberg nvme_process_cq(nvmeq); 99857dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 99957dacad5SJay Sternberg return BLK_MQ_RQ_QUEUE_OK; 100057dacad5SJay Sternberg 100157dacad5SJay Sternberg error_cmd: 100257dacad5SJay Sternberg nvme_free_iod(dev, iod); 100357dacad5SJay Sternberg return BLK_MQ_RQ_QUEUE_ERROR; 100457dacad5SJay Sternberg retry_cmd: 100557dacad5SJay Sternberg nvme_free_iod(dev, iod); 100657dacad5SJay Sternberg return BLK_MQ_RQ_QUEUE_BUSY; 100757dacad5SJay Sternberg } 100857dacad5SJay Sternberg 1009a0fa9647SJens Axboe static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag) 101057dacad5SJay Sternberg { 101157dacad5SJay Sternberg u16 head, phase; 101257dacad5SJay Sternberg 101357dacad5SJay Sternberg head = nvmeq->cq_head; 101457dacad5SJay Sternberg phase = nvmeq->cq_phase; 101557dacad5SJay Sternberg 101657dacad5SJay Sternberg for (;;) { 101757dacad5SJay Sternberg void *ctx; 101857dacad5SJay Sternberg nvme_completion_fn fn; 101957dacad5SJay Sternberg struct nvme_completion cqe = nvmeq->cqes[head]; 102057dacad5SJay Sternberg if ((le16_to_cpu(cqe.status) & 1) != phase) 102157dacad5SJay Sternberg break; 102257dacad5SJay Sternberg nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 102357dacad5SJay Sternberg if (++head == nvmeq->q_depth) { 102457dacad5SJay Sternberg head = 0; 102557dacad5SJay Sternberg phase = !phase; 102657dacad5SJay Sternberg } 1027a0fa9647SJens Axboe if (tag && *tag == cqe.command_id) 1028a0fa9647SJens Axboe *tag = -1; 102957dacad5SJay Sternberg ctx = nvme_finish_cmd(nvmeq, cqe.command_id, &fn); 103057dacad5SJay Sternberg fn(nvmeq, ctx, &cqe); 103157dacad5SJay Sternberg } 103257dacad5SJay Sternberg 103357dacad5SJay Sternberg /* If the controller ignores the cq head doorbell and continuously 103457dacad5SJay Sternberg * writes to the queue, it is theoretically possible to wrap around 103557dacad5SJay Sternberg * the queue twice and mistakenly return IRQ_NONE. Linux only 103657dacad5SJay Sternberg * requires that 0.1% of your interrupts are handled, so this isn't 103757dacad5SJay Sternberg * a big problem. 103857dacad5SJay Sternberg */ 103957dacad5SJay Sternberg if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 1040a0fa9647SJens Axboe return; 104157dacad5SJay Sternberg 1042604e8c8dSKeith Busch if (likely(nvmeq->cq_vector >= 0)) 104357dacad5SJay Sternberg writel(head, nvmeq->q_db + nvmeq->dev->db_stride); 104457dacad5SJay Sternberg nvmeq->cq_head = head; 104557dacad5SJay Sternberg nvmeq->cq_phase = phase; 104657dacad5SJay Sternberg 104757dacad5SJay Sternberg nvmeq->cqe_seen = 1; 1048a0fa9647SJens Axboe } 1049a0fa9647SJens Axboe 1050a0fa9647SJens Axboe static void nvme_process_cq(struct nvme_queue *nvmeq) 1051a0fa9647SJens Axboe { 1052a0fa9647SJens Axboe __nvme_process_cq(nvmeq, NULL); 105357dacad5SJay Sternberg } 105457dacad5SJay Sternberg 105557dacad5SJay Sternberg static irqreturn_t nvme_irq(int irq, void *data) 105657dacad5SJay Sternberg { 105757dacad5SJay Sternberg irqreturn_t result; 105857dacad5SJay Sternberg struct nvme_queue *nvmeq = data; 105957dacad5SJay Sternberg spin_lock(&nvmeq->q_lock); 106057dacad5SJay Sternberg nvme_process_cq(nvmeq); 106157dacad5SJay Sternberg result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; 106257dacad5SJay Sternberg nvmeq->cqe_seen = 0; 106357dacad5SJay Sternberg spin_unlock(&nvmeq->q_lock); 106457dacad5SJay Sternberg return result; 106557dacad5SJay Sternberg } 106657dacad5SJay Sternberg 106757dacad5SJay Sternberg static irqreturn_t nvme_irq_check(int irq, void *data) 106857dacad5SJay Sternberg { 106957dacad5SJay Sternberg struct nvme_queue *nvmeq = data; 107057dacad5SJay Sternberg struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 107157dacad5SJay Sternberg if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 107257dacad5SJay Sternberg return IRQ_NONE; 107357dacad5SJay Sternberg return IRQ_WAKE_THREAD; 107457dacad5SJay Sternberg } 107557dacad5SJay Sternberg 1076a0fa9647SJens Axboe static int nvme_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) 1077a0fa9647SJens Axboe { 1078a0fa9647SJens Axboe struct nvme_queue *nvmeq = hctx->driver_data; 1079a0fa9647SJens Axboe 1080a0fa9647SJens Axboe if ((le16_to_cpu(nvmeq->cqes[nvmeq->cq_head].status) & 1) == 1081a0fa9647SJens Axboe nvmeq->cq_phase) { 1082a0fa9647SJens Axboe spin_lock_irq(&nvmeq->q_lock); 1083a0fa9647SJens Axboe __nvme_process_cq(nvmeq, &tag); 1084a0fa9647SJens Axboe spin_unlock_irq(&nvmeq->q_lock); 1085a0fa9647SJens Axboe 1086a0fa9647SJens Axboe if (tag == -1) 1087a0fa9647SJens Axboe return 1; 1088a0fa9647SJens Axboe } 1089a0fa9647SJens Axboe 1090a0fa9647SJens Axboe return 0; 1091a0fa9647SJens Axboe } 1092a0fa9647SJens Axboe 109357dacad5SJay Sternberg static int nvme_submit_async_admin_req(struct nvme_dev *dev) 109457dacad5SJay Sternberg { 109557dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[0]; 109657dacad5SJay Sternberg struct nvme_command c; 109757dacad5SJay Sternberg struct nvme_cmd_info *cmd_info; 109857dacad5SJay Sternberg struct request *req; 109957dacad5SJay Sternberg 1100*1c63dc66SChristoph Hellwig req = blk_mq_alloc_request(dev->ctrl.admin_q, WRITE, 11016f3b0e8bSChristoph Hellwig BLK_MQ_REQ_NOWAIT | BLK_MQ_REQ_RESERVED); 110257dacad5SJay Sternberg if (IS_ERR(req)) 110357dacad5SJay Sternberg return PTR_ERR(req); 110457dacad5SJay Sternberg 110557dacad5SJay Sternberg req->cmd_flags |= REQ_NO_TIMEOUT; 110657dacad5SJay Sternberg cmd_info = blk_mq_rq_to_pdu(req); 110757dacad5SJay Sternberg nvme_set_info(cmd_info, NULL, async_req_completion); 110857dacad5SJay Sternberg 110957dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 111057dacad5SJay Sternberg c.common.opcode = nvme_admin_async_event; 111157dacad5SJay Sternberg c.common.command_id = req->tag; 111257dacad5SJay Sternberg 111357dacad5SJay Sternberg blk_mq_free_request(req); 111457dacad5SJay Sternberg __nvme_submit_cmd(nvmeq, &c); 111557dacad5SJay Sternberg return 0; 111657dacad5SJay Sternberg } 111757dacad5SJay Sternberg 111857dacad5SJay Sternberg static int nvme_submit_admin_async_cmd(struct nvme_dev *dev, 111957dacad5SJay Sternberg struct nvme_command *cmd, 112057dacad5SJay Sternberg struct async_cmd_info *cmdinfo, unsigned timeout) 112157dacad5SJay Sternberg { 112257dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[0]; 112357dacad5SJay Sternberg struct request *req; 112457dacad5SJay Sternberg struct nvme_cmd_info *cmd_rq; 112557dacad5SJay Sternberg 1126*1c63dc66SChristoph Hellwig req = blk_mq_alloc_request(dev->ctrl.admin_q, WRITE, 0); 112757dacad5SJay Sternberg if (IS_ERR(req)) 112857dacad5SJay Sternberg return PTR_ERR(req); 112957dacad5SJay Sternberg 113057dacad5SJay Sternberg req->timeout = timeout; 113157dacad5SJay Sternberg cmd_rq = blk_mq_rq_to_pdu(req); 113257dacad5SJay Sternberg cmdinfo->req = req; 113357dacad5SJay Sternberg nvme_set_info(cmd_rq, cmdinfo, async_completion); 113457dacad5SJay Sternberg cmdinfo->status = -EINTR; 113557dacad5SJay Sternberg 113657dacad5SJay Sternberg cmd->common.command_id = req->tag; 113757dacad5SJay Sternberg 113857dacad5SJay Sternberg nvme_submit_cmd(nvmeq, cmd); 113957dacad5SJay Sternberg return 0; 114057dacad5SJay Sternberg } 114157dacad5SJay Sternberg 114257dacad5SJay Sternberg static int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 114357dacad5SJay Sternberg { 114457dacad5SJay Sternberg struct nvme_command c; 114557dacad5SJay Sternberg 114657dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 114757dacad5SJay Sternberg c.delete_queue.opcode = opcode; 114857dacad5SJay Sternberg c.delete_queue.qid = cpu_to_le16(id); 114957dacad5SJay Sternberg 1150*1c63dc66SChristoph Hellwig return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); 115157dacad5SJay Sternberg } 115257dacad5SJay Sternberg 115357dacad5SJay Sternberg static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 115457dacad5SJay Sternberg struct nvme_queue *nvmeq) 115557dacad5SJay Sternberg { 115657dacad5SJay Sternberg struct nvme_command c; 115757dacad5SJay Sternberg int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 115857dacad5SJay Sternberg 115957dacad5SJay Sternberg /* 116057dacad5SJay Sternberg * Note: we (ab)use the fact the the prp fields survive if no data 116157dacad5SJay Sternberg * is attached to the request. 116257dacad5SJay Sternberg */ 116357dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 116457dacad5SJay Sternberg c.create_cq.opcode = nvme_admin_create_cq; 116557dacad5SJay Sternberg c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 116657dacad5SJay Sternberg c.create_cq.cqid = cpu_to_le16(qid); 116757dacad5SJay Sternberg c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 116857dacad5SJay Sternberg c.create_cq.cq_flags = cpu_to_le16(flags); 116957dacad5SJay Sternberg c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 117057dacad5SJay Sternberg 1171*1c63dc66SChristoph Hellwig return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); 117257dacad5SJay Sternberg } 117357dacad5SJay Sternberg 117457dacad5SJay Sternberg static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 117557dacad5SJay Sternberg struct nvme_queue *nvmeq) 117657dacad5SJay Sternberg { 117757dacad5SJay Sternberg struct nvme_command c; 117857dacad5SJay Sternberg int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 117957dacad5SJay Sternberg 118057dacad5SJay Sternberg /* 118157dacad5SJay Sternberg * Note: we (ab)use the fact the the prp fields survive if no data 118257dacad5SJay Sternberg * is attached to the request. 118357dacad5SJay Sternberg */ 118457dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 118557dacad5SJay Sternberg c.create_sq.opcode = nvme_admin_create_sq; 118657dacad5SJay Sternberg c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 118757dacad5SJay Sternberg c.create_sq.sqid = cpu_to_le16(qid); 118857dacad5SJay Sternberg c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 118957dacad5SJay Sternberg c.create_sq.sq_flags = cpu_to_le16(flags); 119057dacad5SJay Sternberg c.create_sq.cqid = cpu_to_le16(qid); 119157dacad5SJay Sternberg 1192*1c63dc66SChristoph Hellwig return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); 119357dacad5SJay Sternberg } 119457dacad5SJay Sternberg 119557dacad5SJay Sternberg static int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 119657dacad5SJay Sternberg { 119757dacad5SJay Sternberg return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 119857dacad5SJay Sternberg } 119957dacad5SJay Sternberg 120057dacad5SJay Sternberg static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 120157dacad5SJay Sternberg { 120257dacad5SJay Sternberg return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 120357dacad5SJay Sternberg } 120457dacad5SJay Sternberg 120557dacad5SJay Sternberg /** 120657dacad5SJay Sternberg * nvme_abort_req - Attempt aborting a request 120757dacad5SJay Sternberg * 120857dacad5SJay Sternberg * Schedule controller reset if the command was already aborted once before and 120957dacad5SJay Sternberg * still hasn't been returned to the driver, or if this is the admin queue. 121057dacad5SJay Sternberg */ 121157dacad5SJay Sternberg static void nvme_abort_req(struct request *req) 121257dacad5SJay Sternberg { 121357dacad5SJay Sternberg struct nvme_cmd_info *cmd_rq = blk_mq_rq_to_pdu(req); 121457dacad5SJay Sternberg struct nvme_queue *nvmeq = cmd_rq->nvmeq; 121557dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 121657dacad5SJay Sternberg struct request *abort_req; 121757dacad5SJay Sternberg struct nvme_cmd_info *abort_cmd; 121857dacad5SJay Sternberg struct nvme_command cmd; 121957dacad5SJay Sternberg 122057dacad5SJay Sternberg if (!nvmeq->qid || cmd_rq->aborted) { 122157dacad5SJay Sternberg spin_lock(&dev_list_lock); 122257dacad5SJay Sternberg if (!__nvme_reset(dev)) { 122357dacad5SJay Sternberg dev_warn(dev->dev, 122457dacad5SJay Sternberg "I/O %d QID %d timeout, reset controller\n", 122557dacad5SJay Sternberg req->tag, nvmeq->qid); 122657dacad5SJay Sternberg } 122757dacad5SJay Sternberg spin_unlock(&dev_list_lock); 122857dacad5SJay Sternberg return; 122957dacad5SJay Sternberg } 123057dacad5SJay Sternberg 1231*1c63dc66SChristoph Hellwig if (!dev->ctrl.abort_limit) 123257dacad5SJay Sternberg return; 123357dacad5SJay Sternberg 1234*1c63dc66SChristoph Hellwig abort_req = blk_mq_alloc_request(dev->ctrl.admin_q, WRITE, 12356f3b0e8bSChristoph Hellwig BLK_MQ_REQ_NOWAIT); 123657dacad5SJay Sternberg if (IS_ERR(abort_req)) 123757dacad5SJay Sternberg return; 123857dacad5SJay Sternberg 123957dacad5SJay Sternberg abort_cmd = blk_mq_rq_to_pdu(abort_req); 124057dacad5SJay Sternberg nvme_set_info(abort_cmd, abort_req, abort_completion); 124157dacad5SJay Sternberg 124257dacad5SJay Sternberg memset(&cmd, 0, sizeof(cmd)); 124357dacad5SJay Sternberg cmd.abort.opcode = nvme_admin_abort_cmd; 124457dacad5SJay Sternberg cmd.abort.cid = req->tag; 124557dacad5SJay Sternberg cmd.abort.sqid = cpu_to_le16(nvmeq->qid); 124657dacad5SJay Sternberg cmd.abort.command_id = abort_req->tag; 124757dacad5SJay Sternberg 1248*1c63dc66SChristoph Hellwig --dev->ctrl.abort_limit; 124957dacad5SJay Sternberg cmd_rq->aborted = 1; 125057dacad5SJay Sternberg 125157dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, "Aborting I/O %d QID %d\n", req->tag, 125257dacad5SJay Sternberg nvmeq->qid); 125357dacad5SJay Sternberg nvme_submit_cmd(dev->queues[0], &cmd); 125457dacad5SJay Sternberg } 125557dacad5SJay Sternberg 125657dacad5SJay Sternberg static void nvme_cancel_queue_ios(struct request *req, void *data, bool reserved) 125757dacad5SJay Sternberg { 125857dacad5SJay Sternberg struct nvme_queue *nvmeq = data; 125957dacad5SJay Sternberg void *ctx; 126057dacad5SJay Sternberg nvme_completion_fn fn; 126157dacad5SJay Sternberg struct nvme_cmd_info *cmd; 126257dacad5SJay Sternberg struct nvme_completion cqe; 126357dacad5SJay Sternberg 126457dacad5SJay Sternberg if (!blk_mq_request_started(req)) 126557dacad5SJay Sternberg return; 126657dacad5SJay Sternberg 126757dacad5SJay Sternberg cmd = blk_mq_rq_to_pdu(req); 126857dacad5SJay Sternberg 126957dacad5SJay Sternberg if (cmd->ctx == CMD_CTX_CANCELLED) 127057dacad5SJay Sternberg return; 127157dacad5SJay Sternberg 127257dacad5SJay Sternberg if (blk_queue_dying(req->q)) 127357dacad5SJay Sternberg cqe.status = cpu_to_le16((NVME_SC_ABORT_REQ | NVME_SC_DNR) << 1); 127457dacad5SJay Sternberg else 127557dacad5SJay Sternberg cqe.status = cpu_to_le16(NVME_SC_ABORT_REQ << 1); 127657dacad5SJay Sternberg 127757dacad5SJay Sternberg 127857dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d QID %d\n", 127957dacad5SJay Sternberg req->tag, nvmeq->qid); 128057dacad5SJay Sternberg ctx = cancel_cmd_info(cmd, &fn); 128157dacad5SJay Sternberg fn(nvmeq, ctx, &cqe); 128257dacad5SJay Sternberg } 128357dacad5SJay Sternberg 128457dacad5SJay Sternberg static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) 128557dacad5SJay Sternberg { 128657dacad5SJay Sternberg struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); 128757dacad5SJay Sternberg struct nvme_queue *nvmeq = cmd->nvmeq; 128857dacad5SJay Sternberg 128957dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, "Timeout I/O %d QID %d\n", req->tag, 129057dacad5SJay Sternberg nvmeq->qid); 129157dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 129257dacad5SJay Sternberg nvme_abort_req(req); 129357dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 129457dacad5SJay Sternberg 129557dacad5SJay Sternberg /* 129657dacad5SJay Sternberg * The aborted req will be completed on receiving the abort req. 129757dacad5SJay Sternberg * We enable the timer again. If hit twice, it'll cause a device reset, 129857dacad5SJay Sternberg * as the device then is in a faulty state. 129957dacad5SJay Sternberg */ 130057dacad5SJay Sternberg return BLK_EH_RESET_TIMER; 130157dacad5SJay Sternberg } 130257dacad5SJay Sternberg 130357dacad5SJay Sternberg static void nvme_free_queue(struct nvme_queue *nvmeq) 130457dacad5SJay Sternberg { 130557dacad5SJay Sternberg dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 130657dacad5SJay Sternberg (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 130757dacad5SJay Sternberg if (nvmeq->sq_cmds) 130857dacad5SJay Sternberg dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 130957dacad5SJay Sternberg nvmeq->sq_cmds, nvmeq->sq_dma_addr); 131057dacad5SJay Sternberg kfree(nvmeq); 131157dacad5SJay Sternberg } 131257dacad5SJay Sternberg 131357dacad5SJay Sternberg static void nvme_free_queues(struct nvme_dev *dev, int lowest) 131457dacad5SJay Sternberg { 131557dacad5SJay Sternberg int i; 131657dacad5SJay Sternberg 131757dacad5SJay Sternberg for (i = dev->queue_count - 1; i >= lowest; i--) { 131857dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 131957dacad5SJay Sternberg dev->queue_count--; 132057dacad5SJay Sternberg dev->queues[i] = NULL; 132157dacad5SJay Sternberg nvme_free_queue(nvmeq); 132257dacad5SJay Sternberg } 132357dacad5SJay Sternberg } 132457dacad5SJay Sternberg 132557dacad5SJay Sternberg /** 132657dacad5SJay Sternberg * nvme_suspend_queue - put queue into suspended state 132757dacad5SJay Sternberg * @nvmeq - queue to suspend 132857dacad5SJay Sternberg */ 132957dacad5SJay Sternberg static int nvme_suspend_queue(struct nvme_queue *nvmeq) 133057dacad5SJay Sternberg { 133157dacad5SJay Sternberg int vector; 133257dacad5SJay Sternberg 133357dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 133457dacad5SJay Sternberg if (nvmeq->cq_vector == -1) { 133557dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 133657dacad5SJay Sternberg return 1; 133757dacad5SJay Sternberg } 133857dacad5SJay Sternberg vector = nvmeq->dev->entry[nvmeq->cq_vector].vector; 133957dacad5SJay Sternberg nvmeq->dev->online_queues--; 134057dacad5SJay Sternberg nvmeq->cq_vector = -1; 134157dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 134257dacad5SJay Sternberg 1343*1c63dc66SChristoph Hellwig if (!nvmeq->qid && nvmeq->dev->ctrl.admin_q) 1344*1c63dc66SChristoph Hellwig blk_mq_freeze_queue_start(nvmeq->dev->ctrl.admin_q); 134557dacad5SJay Sternberg 134657dacad5SJay Sternberg irq_set_affinity_hint(vector, NULL); 134757dacad5SJay Sternberg free_irq(vector, nvmeq); 134857dacad5SJay Sternberg 134957dacad5SJay Sternberg return 0; 135057dacad5SJay Sternberg } 135157dacad5SJay Sternberg 135257dacad5SJay Sternberg static void nvme_clear_queue(struct nvme_queue *nvmeq) 135357dacad5SJay Sternberg { 135457dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 135557dacad5SJay Sternberg if (nvmeq->tags && *nvmeq->tags) 135657dacad5SJay Sternberg blk_mq_all_tag_busy_iter(*nvmeq->tags, nvme_cancel_queue_ios, nvmeq); 135757dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 135857dacad5SJay Sternberg } 135957dacad5SJay Sternberg 136057dacad5SJay Sternberg static void nvme_disable_queue(struct nvme_dev *dev, int qid) 136157dacad5SJay Sternberg { 136257dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[qid]; 136357dacad5SJay Sternberg 136457dacad5SJay Sternberg if (!nvmeq) 136557dacad5SJay Sternberg return; 136657dacad5SJay Sternberg if (nvme_suspend_queue(nvmeq)) 136757dacad5SJay Sternberg return; 136857dacad5SJay Sternberg 136957dacad5SJay Sternberg /* Don't tell the adapter to delete the admin queue. 137057dacad5SJay Sternberg * Don't tell a removed adapter to delete IO queues. */ 13717a67cbeaSChristoph Hellwig if (qid && readl(dev->bar + NVME_REG_CSTS) != -1) { 137257dacad5SJay Sternberg adapter_delete_sq(dev, qid); 137357dacad5SJay Sternberg adapter_delete_cq(dev, qid); 137457dacad5SJay Sternberg } 137557dacad5SJay Sternberg 137657dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 137757dacad5SJay Sternberg nvme_process_cq(nvmeq); 137857dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 137957dacad5SJay Sternberg } 138057dacad5SJay Sternberg 138157dacad5SJay Sternberg static int nvme_cmb_qdepth(struct nvme_dev *dev, int nr_io_queues, 138257dacad5SJay Sternberg int entry_size) 138357dacad5SJay Sternberg { 138457dacad5SJay Sternberg int q_depth = dev->q_depth; 138557dacad5SJay Sternberg unsigned q_size_aligned = roundup(q_depth * entry_size, dev->page_size); 138657dacad5SJay Sternberg 138757dacad5SJay Sternberg if (q_size_aligned * nr_io_queues > dev->cmb_size) { 138857dacad5SJay Sternberg u64 mem_per_q = div_u64(dev->cmb_size, nr_io_queues); 138957dacad5SJay Sternberg mem_per_q = round_down(mem_per_q, dev->page_size); 139057dacad5SJay Sternberg q_depth = div_u64(mem_per_q, entry_size); 139157dacad5SJay Sternberg 139257dacad5SJay Sternberg /* 139357dacad5SJay Sternberg * Ensure the reduced q_depth is above some threshold where it 139457dacad5SJay Sternberg * would be better to map queues in system memory with the 139557dacad5SJay Sternberg * original depth 139657dacad5SJay Sternberg */ 139757dacad5SJay Sternberg if (q_depth < 64) 139857dacad5SJay Sternberg return -ENOMEM; 139957dacad5SJay Sternberg } 140057dacad5SJay Sternberg 140157dacad5SJay Sternberg return q_depth; 140257dacad5SJay Sternberg } 140357dacad5SJay Sternberg 140457dacad5SJay Sternberg static int nvme_alloc_sq_cmds(struct nvme_dev *dev, struct nvme_queue *nvmeq, 140557dacad5SJay Sternberg int qid, int depth) 140657dacad5SJay Sternberg { 140757dacad5SJay Sternberg if (qid && dev->cmb && use_cmb_sqes && NVME_CMB_SQS(dev->cmbsz)) { 140857dacad5SJay Sternberg unsigned offset = (qid - 1) * 140957dacad5SJay Sternberg roundup(SQ_SIZE(depth), dev->page_size); 141057dacad5SJay Sternberg nvmeq->sq_dma_addr = dev->cmb_dma_addr + offset; 141157dacad5SJay Sternberg nvmeq->sq_cmds_io = dev->cmb + offset; 141257dacad5SJay Sternberg } else { 141357dacad5SJay Sternberg nvmeq->sq_cmds = dma_alloc_coherent(dev->dev, SQ_SIZE(depth), 141457dacad5SJay Sternberg &nvmeq->sq_dma_addr, GFP_KERNEL); 141557dacad5SJay Sternberg if (!nvmeq->sq_cmds) 141657dacad5SJay Sternberg return -ENOMEM; 141757dacad5SJay Sternberg } 141857dacad5SJay Sternberg 141957dacad5SJay Sternberg return 0; 142057dacad5SJay Sternberg } 142157dacad5SJay Sternberg 142257dacad5SJay Sternberg static struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 142357dacad5SJay Sternberg int depth) 142457dacad5SJay Sternberg { 142557dacad5SJay Sternberg struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq), GFP_KERNEL); 142657dacad5SJay Sternberg if (!nvmeq) 142757dacad5SJay Sternberg return NULL; 142857dacad5SJay Sternberg 142957dacad5SJay Sternberg nvmeq->cqes = dma_zalloc_coherent(dev->dev, CQ_SIZE(depth), 143057dacad5SJay Sternberg &nvmeq->cq_dma_addr, GFP_KERNEL); 143157dacad5SJay Sternberg if (!nvmeq->cqes) 143257dacad5SJay Sternberg goto free_nvmeq; 143357dacad5SJay Sternberg 143457dacad5SJay Sternberg if (nvme_alloc_sq_cmds(dev, nvmeq, qid, depth)) 143557dacad5SJay Sternberg goto free_cqdma; 143657dacad5SJay Sternberg 143757dacad5SJay Sternberg nvmeq->q_dmadev = dev->dev; 143857dacad5SJay Sternberg nvmeq->dev = dev; 143957dacad5SJay Sternberg snprintf(nvmeq->irqname, sizeof(nvmeq->irqname), "nvme%dq%d", 1440*1c63dc66SChristoph Hellwig dev->ctrl.instance, qid); 144157dacad5SJay Sternberg spin_lock_init(&nvmeq->q_lock); 144257dacad5SJay Sternberg nvmeq->cq_head = 0; 144357dacad5SJay Sternberg nvmeq->cq_phase = 1; 144457dacad5SJay Sternberg nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 144557dacad5SJay Sternberg nvmeq->q_depth = depth; 144657dacad5SJay Sternberg nvmeq->qid = qid; 144757dacad5SJay Sternberg nvmeq->cq_vector = -1; 144857dacad5SJay Sternberg dev->queues[qid] = nvmeq; 144957dacad5SJay Sternberg 145057dacad5SJay Sternberg /* make sure queue descriptor is set before queue count, for kthread */ 145157dacad5SJay Sternberg mb(); 145257dacad5SJay Sternberg dev->queue_count++; 145357dacad5SJay Sternberg 145457dacad5SJay Sternberg return nvmeq; 145557dacad5SJay Sternberg 145657dacad5SJay Sternberg free_cqdma: 145757dacad5SJay Sternberg dma_free_coherent(dev->dev, CQ_SIZE(depth), (void *)nvmeq->cqes, 145857dacad5SJay Sternberg nvmeq->cq_dma_addr); 145957dacad5SJay Sternberg free_nvmeq: 146057dacad5SJay Sternberg kfree(nvmeq); 146157dacad5SJay Sternberg return NULL; 146257dacad5SJay Sternberg } 146357dacad5SJay Sternberg 146457dacad5SJay Sternberg static int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 146557dacad5SJay Sternberg const char *name) 146657dacad5SJay Sternberg { 146757dacad5SJay Sternberg if (use_threaded_interrupts) 146857dacad5SJay Sternberg return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 146957dacad5SJay Sternberg nvme_irq_check, nvme_irq, IRQF_SHARED, 147057dacad5SJay Sternberg name, nvmeq); 147157dacad5SJay Sternberg return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 147257dacad5SJay Sternberg IRQF_SHARED, name, nvmeq); 147357dacad5SJay Sternberg } 147457dacad5SJay Sternberg 147557dacad5SJay Sternberg static void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) 147657dacad5SJay Sternberg { 147757dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 147857dacad5SJay Sternberg 147957dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 148057dacad5SJay Sternberg nvmeq->sq_tail = 0; 148157dacad5SJay Sternberg nvmeq->cq_head = 0; 148257dacad5SJay Sternberg nvmeq->cq_phase = 1; 148357dacad5SJay Sternberg nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 148457dacad5SJay Sternberg memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); 148557dacad5SJay Sternberg dev->online_queues++; 148657dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 148757dacad5SJay Sternberg } 148857dacad5SJay Sternberg 148957dacad5SJay Sternberg static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) 149057dacad5SJay Sternberg { 149157dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 149257dacad5SJay Sternberg int result; 149357dacad5SJay Sternberg 149457dacad5SJay Sternberg nvmeq->cq_vector = qid - 1; 149557dacad5SJay Sternberg result = adapter_alloc_cq(dev, qid, nvmeq); 149657dacad5SJay Sternberg if (result < 0) 149757dacad5SJay Sternberg return result; 149857dacad5SJay Sternberg 149957dacad5SJay Sternberg result = adapter_alloc_sq(dev, qid, nvmeq); 150057dacad5SJay Sternberg if (result < 0) 150157dacad5SJay Sternberg goto release_cq; 150257dacad5SJay Sternberg 150357dacad5SJay Sternberg result = queue_request_irq(dev, nvmeq, nvmeq->irqname); 150457dacad5SJay Sternberg if (result < 0) 150557dacad5SJay Sternberg goto release_sq; 150657dacad5SJay Sternberg 150757dacad5SJay Sternberg nvme_init_queue(nvmeq, qid); 150857dacad5SJay Sternberg return result; 150957dacad5SJay Sternberg 151057dacad5SJay Sternberg release_sq: 151157dacad5SJay Sternberg adapter_delete_sq(dev, qid); 151257dacad5SJay Sternberg release_cq: 151357dacad5SJay Sternberg adapter_delete_cq(dev, qid); 151457dacad5SJay Sternberg return result; 151557dacad5SJay Sternberg } 151657dacad5SJay Sternberg 151757dacad5SJay Sternberg static int nvme_wait_ready(struct nvme_dev *dev, u64 cap, bool enabled) 151857dacad5SJay Sternberg { 151957dacad5SJay Sternberg unsigned long timeout; 152057dacad5SJay Sternberg u32 bit = enabled ? NVME_CSTS_RDY : 0; 152157dacad5SJay Sternberg 152257dacad5SJay Sternberg timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; 152357dacad5SJay Sternberg 15247a67cbeaSChristoph Hellwig while ((readl(dev->bar + NVME_REG_CSTS) & NVME_CSTS_RDY) != bit) { 152557dacad5SJay Sternberg msleep(100); 152657dacad5SJay Sternberg if (fatal_signal_pending(current)) 152757dacad5SJay Sternberg return -EINTR; 152857dacad5SJay Sternberg if (time_after(jiffies, timeout)) { 152957dacad5SJay Sternberg dev_err(dev->dev, 153057dacad5SJay Sternberg "Device not ready; aborting %s\n", enabled ? 153157dacad5SJay Sternberg "initialisation" : "reset"); 153257dacad5SJay Sternberg return -ENODEV; 153357dacad5SJay Sternberg } 153457dacad5SJay Sternberg } 153557dacad5SJay Sternberg 153657dacad5SJay Sternberg return 0; 153757dacad5SJay Sternberg } 153857dacad5SJay Sternberg 153957dacad5SJay Sternberg /* 154057dacad5SJay Sternberg * If the device has been passed off to us in an enabled state, just clear 154157dacad5SJay Sternberg * the enabled bit. The spec says we should set the 'shutdown notification 154257dacad5SJay Sternberg * bits', but doing so may cause the device to complete commands to the 154357dacad5SJay Sternberg * admin queue ... and we don't know what memory that might be pointing at! 154457dacad5SJay Sternberg */ 154557dacad5SJay Sternberg static int nvme_disable_ctrl(struct nvme_dev *dev, u64 cap) 154657dacad5SJay Sternberg { 154757dacad5SJay Sternberg dev->ctrl_config &= ~NVME_CC_SHN_MASK; 154857dacad5SJay Sternberg dev->ctrl_config &= ~NVME_CC_ENABLE; 15497a67cbeaSChristoph Hellwig writel(dev->ctrl_config, dev->bar + NVME_REG_CC); 155057dacad5SJay Sternberg 155157dacad5SJay Sternberg return nvme_wait_ready(dev, cap, false); 155257dacad5SJay Sternberg } 155357dacad5SJay Sternberg 155457dacad5SJay Sternberg static int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap) 155557dacad5SJay Sternberg { 155657dacad5SJay Sternberg dev->ctrl_config &= ~NVME_CC_SHN_MASK; 155757dacad5SJay Sternberg dev->ctrl_config |= NVME_CC_ENABLE; 15587a67cbeaSChristoph Hellwig writel(dev->ctrl_config, dev->bar + NVME_REG_CC); 155957dacad5SJay Sternberg 156057dacad5SJay Sternberg return nvme_wait_ready(dev, cap, true); 156157dacad5SJay Sternberg } 156257dacad5SJay Sternberg 156357dacad5SJay Sternberg static int nvme_shutdown_ctrl(struct nvme_dev *dev) 156457dacad5SJay Sternberg { 156557dacad5SJay Sternberg unsigned long timeout; 156657dacad5SJay Sternberg 156757dacad5SJay Sternberg dev->ctrl_config &= ~NVME_CC_SHN_MASK; 156857dacad5SJay Sternberg dev->ctrl_config |= NVME_CC_SHN_NORMAL; 156957dacad5SJay Sternberg 15707a67cbeaSChristoph Hellwig writel(dev->ctrl_config, dev->bar + NVME_REG_CC); 157157dacad5SJay Sternberg 157257dacad5SJay Sternberg timeout = SHUTDOWN_TIMEOUT + jiffies; 15737a67cbeaSChristoph Hellwig while ((readl(dev->bar + NVME_REG_CSTS) & NVME_CSTS_SHST_MASK) != 157457dacad5SJay Sternberg NVME_CSTS_SHST_CMPLT) { 157557dacad5SJay Sternberg msleep(100); 157657dacad5SJay Sternberg if (fatal_signal_pending(current)) 157757dacad5SJay Sternberg return -EINTR; 157857dacad5SJay Sternberg if (time_after(jiffies, timeout)) { 157957dacad5SJay Sternberg dev_err(dev->dev, 158057dacad5SJay Sternberg "Device shutdown incomplete; abort shutdown\n"); 158157dacad5SJay Sternberg return -ENODEV; 158257dacad5SJay Sternberg } 158357dacad5SJay Sternberg } 158457dacad5SJay Sternberg 158557dacad5SJay Sternberg return 0; 158657dacad5SJay Sternberg } 158757dacad5SJay Sternberg 158857dacad5SJay Sternberg static struct blk_mq_ops nvme_mq_admin_ops = { 158957dacad5SJay Sternberg .queue_rq = nvme_queue_rq, 159057dacad5SJay Sternberg .map_queue = blk_mq_map_queue, 159157dacad5SJay Sternberg .init_hctx = nvme_admin_init_hctx, 159257dacad5SJay Sternberg .exit_hctx = nvme_admin_exit_hctx, 159357dacad5SJay Sternberg .init_request = nvme_admin_init_request, 159457dacad5SJay Sternberg .timeout = nvme_timeout, 159557dacad5SJay Sternberg }; 159657dacad5SJay Sternberg 159757dacad5SJay Sternberg static struct blk_mq_ops nvme_mq_ops = { 159857dacad5SJay Sternberg .queue_rq = nvme_queue_rq, 159957dacad5SJay Sternberg .map_queue = blk_mq_map_queue, 160057dacad5SJay Sternberg .init_hctx = nvme_init_hctx, 160157dacad5SJay Sternberg .init_request = nvme_init_request, 160257dacad5SJay Sternberg .timeout = nvme_timeout, 1603a0fa9647SJens Axboe .poll = nvme_poll, 160457dacad5SJay Sternberg }; 160557dacad5SJay Sternberg 160657dacad5SJay Sternberg static void nvme_dev_remove_admin(struct nvme_dev *dev) 160757dacad5SJay Sternberg { 1608*1c63dc66SChristoph Hellwig if (dev->ctrl.admin_q && !blk_queue_dying(dev->ctrl.admin_q)) { 1609*1c63dc66SChristoph Hellwig blk_cleanup_queue(dev->ctrl.admin_q); 161057dacad5SJay Sternberg blk_mq_free_tag_set(&dev->admin_tagset); 161157dacad5SJay Sternberg } 161257dacad5SJay Sternberg } 161357dacad5SJay Sternberg 161457dacad5SJay Sternberg static int nvme_alloc_admin_tags(struct nvme_dev *dev) 161557dacad5SJay Sternberg { 1616*1c63dc66SChristoph Hellwig if (!dev->ctrl.admin_q) { 161757dacad5SJay Sternberg dev->admin_tagset.ops = &nvme_mq_admin_ops; 161857dacad5SJay Sternberg dev->admin_tagset.nr_hw_queues = 1; 161957dacad5SJay Sternberg dev->admin_tagset.queue_depth = NVME_AQ_DEPTH - 1; 162057dacad5SJay Sternberg dev->admin_tagset.reserved_tags = 1; 162157dacad5SJay Sternberg dev->admin_tagset.timeout = ADMIN_TIMEOUT; 162257dacad5SJay Sternberg dev->admin_tagset.numa_node = dev_to_node(dev->dev); 162357dacad5SJay Sternberg dev->admin_tagset.cmd_size = nvme_cmd_size(dev); 162457dacad5SJay Sternberg dev->admin_tagset.driver_data = dev; 162557dacad5SJay Sternberg 162657dacad5SJay Sternberg if (blk_mq_alloc_tag_set(&dev->admin_tagset)) 162757dacad5SJay Sternberg return -ENOMEM; 162857dacad5SJay Sternberg 1629*1c63dc66SChristoph Hellwig dev->ctrl.admin_q = blk_mq_init_queue(&dev->admin_tagset); 1630*1c63dc66SChristoph Hellwig if (IS_ERR(dev->ctrl.admin_q)) { 163157dacad5SJay Sternberg blk_mq_free_tag_set(&dev->admin_tagset); 163257dacad5SJay Sternberg return -ENOMEM; 163357dacad5SJay Sternberg } 1634*1c63dc66SChristoph Hellwig if (!blk_get_queue(dev->ctrl.admin_q)) { 163557dacad5SJay Sternberg nvme_dev_remove_admin(dev); 1636*1c63dc66SChristoph Hellwig dev->ctrl.admin_q = NULL; 163757dacad5SJay Sternberg return -ENODEV; 163857dacad5SJay Sternberg } 163957dacad5SJay Sternberg } else 1640*1c63dc66SChristoph Hellwig blk_mq_unfreeze_queue(dev->ctrl.admin_q); 164157dacad5SJay Sternberg 164257dacad5SJay Sternberg return 0; 164357dacad5SJay Sternberg } 164457dacad5SJay Sternberg 164557dacad5SJay Sternberg static int nvme_configure_admin_queue(struct nvme_dev *dev) 164657dacad5SJay Sternberg { 164757dacad5SJay Sternberg int result; 164857dacad5SJay Sternberg u32 aqa; 16497a67cbeaSChristoph Hellwig u64 cap = lo_hi_readq(dev->bar + NVME_REG_CAP); 165057dacad5SJay Sternberg struct nvme_queue *nvmeq; 1651c5c9f25bSNishanth Aravamudan /* 1652c5c9f25bSNishanth Aravamudan * default to a 4K page size, with the intention to update this 1653c5c9f25bSNishanth Aravamudan * path in the future to accomodate architectures with differing 1654c5c9f25bSNishanth Aravamudan * kernel and IO page sizes. 1655c5c9f25bSNishanth Aravamudan */ 1656c5c9f25bSNishanth Aravamudan unsigned page_shift = 12; 165757dacad5SJay Sternberg unsigned dev_page_min = NVME_CAP_MPSMIN(cap) + 12; 165857dacad5SJay Sternberg 165957dacad5SJay Sternberg if (page_shift < dev_page_min) { 166057dacad5SJay Sternberg dev_err(dev->dev, 166157dacad5SJay Sternberg "Minimum device page size (%u) too large for " 166257dacad5SJay Sternberg "host (%u)\n", 1 << dev_page_min, 166357dacad5SJay Sternberg 1 << page_shift); 166457dacad5SJay Sternberg return -ENODEV; 166557dacad5SJay Sternberg } 166657dacad5SJay Sternberg 16677a67cbeaSChristoph Hellwig dev->subsystem = readl(dev->bar + NVME_REG_VS) >= NVME_VS(1, 1) ? 166857dacad5SJay Sternberg NVME_CAP_NSSRC(cap) : 0; 166957dacad5SJay Sternberg 16707a67cbeaSChristoph Hellwig if (dev->subsystem && 16717a67cbeaSChristoph Hellwig (readl(dev->bar + NVME_REG_CSTS) & NVME_CSTS_NSSRO)) 16727a67cbeaSChristoph Hellwig writel(NVME_CSTS_NSSRO, dev->bar + NVME_REG_CSTS); 167357dacad5SJay Sternberg 167457dacad5SJay Sternberg result = nvme_disable_ctrl(dev, cap); 167557dacad5SJay Sternberg if (result < 0) 167657dacad5SJay Sternberg return result; 167757dacad5SJay Sternberg 167857dacad5SJay Sternberg nvmeq = dev->queues[0]; 167957dacad5SJay Sternberg if (!nvmeq) { 168057dacad5SJay Sternberg nvmeq = nvme_alloc_queue(dev, 0, NVME_AQ_DEPTH); 168157dacad5SJay Sternberg if (!nvmeq) 168257dacad5SJay Sternberg return -ENOMEM; 168357dacad5SJay Sternberg } 168457dacad5SJay Sternberg 168557dacad5SJay Sternberg aqa = nvmeq->q_depth - 1; 168657dacad5SJay Sternberg aqa |= aqa << 16; 168757dacad5SJay Sternberg 168857dacad5SJay Sternberg dev->page_size = 1 << page_shift; 168957dacad5SJay Sternberg 169057dacad5SJay Sternberg dev->ctrl_config = NVME_CC_CSS_NVM; 169157dacad5SJay Sternberg dev->ctrl_config |= (page_shift - 12) << NVME_CC_MPS_SHIFT; 169257dacad5SJay Sternberg dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; 169357dacad5SJay Sternberg dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; 169457dacad5SJay Sternberg 16957a67cbeaSChristoph Hellwig writel(aqa, dev->bar + NVME_REG_AQA); 16967a67cbeaSChristoph Hellwig lo_hi_writeq(nvmeq->sq_dma_addr, dev->bar + NVME_REG_ASQ); 16977a67cbeaSChristoph Hellwig lo_hi_writeq(nvmeq->cq_dma_addr, dev->bar + NVME_REG_ACQ); 169857dacad5SJay Sternberg 169957dacad5SJay Sternberg result = nvme_enable_ctrl(dev, cap); 170057dacad5SJay Sternberg if (result) 170157dacad5SJay Sternberg goto free_nvmeq; 170257dacad5SJay Sternberg 170357dacad5SJay Sternberg nvmeq->cq_vector = 0; 170457dacad5SJay Sternberg result = queue_request_irq(dev, nvmeq, nvmeq->irqname); 170557dacad5SJay Sternberg if (result) { 170657dacad5SJay Sternberg nvmeq->cq_vector = -1; 170757dacad5SJay Sternberg goto free_nvmeq; 170857dacad5SJay Sternberg } 170957dacad5SJay Sternberg 171057dacad5SJay Sternberg return result; 171157dacad5SJay Sternberg 171257dacad5SJay Sternberg free_nvmeq: 171357dacad5SJay Sternberg nvme_free_queues(dev, 0); 171457dacad5SJay Sternberg return result; 171557dacad5SJay Sternberg } 171657dacad5SJay Sternberg 171757dacad5SJay Sternberg static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) 171857dacad5SJay Sternberg { 1719*1c63dc66SChristoph Hellwig struct nvme_dev *dev = to_nvme_dev(ns->ctrl); 172057dacad5SJay Sternberg struct nvme_user_io io; 172157dacad5SJay Sternberg struct nvme_command c; 172257dacad5SJay Sternberg unsigned length, meta_len; 172357dacad5SJay Sternberg int status, write; 172457dacad5SJay Sternberg dma_addr_t meta_dma = 0; 172557dacad5SJay Sternberg void *meta = NULL; 172657dacad5SJay Sternberg void __user *metadata; 172757dacad5SJay Sternberg 172857dacad5SJay Sternberg if (copy_from_user(&io, uio, sizeof(io))) 172957dacad5SJay Sternberg return -EFAULT; 173057dacad5SJay Sternberg 173157dacad5SJay Sternberg switch (io.opcode) { 173257dacad5SJay Sternberg case nvme_cmd_write: 173357dacad5SJay Sternberg case nvme_cmd_read: 173457dacad5SJay Sternberg case nvme_cmd_compare: 173557dacad5SJay Sternberg break; 173657dacad5SJay Sternberg default: 173757dacad5SJay Sternberg return -EINVAL; 173857dacad5SJay Sternberg } 173957dacad5SJay Sternberg 174057dacad5SJay Sternberg length = (io.nblocks + 1) << ns->lba_shift; 174157dacad5SJay Sternberg meta_len = (io.nblocks + 1) * ns->ms; 17423d42e67fSArnd Bergmann metadata = (void __user *)(uintptr_t)io.metadata; 174357dacad5SJay Sternberg write = io.opcode & 1; 174457dacad5SJay Sternberg 174557dacad5SJay Sternberg if (ns->ext) { 174657dacad5SJay Sternberg length += meta_len; 174757dacad5SJay Sternberg meta_len = 0; 174857dacad5SJay Sternberg } 174957dacad5SJay Sternberg if (meta_len) { 175057dacad5SJay Sternberg if (((io.metadata & 3) || !io.metadata) && !ns->ext) 175157dacad5SJay Sternberg return -EINVAL; 175257dacad5SJay Sternberg 175357dacad5SJay Sternberg meta = dma_alloc_coherent(dev->dev, meta_len, 175457dacad5SJay Sternberg &meta_dma, GFP_KERNEL); 175557dacad5SJay Sternberg 175657dacad5SJay Sternberg if (!meta) { 175757dacad5SJay Sternberg status = -ENOMEM; 175857dacad5SJay Sternberg goto unmap; 175957dacad5SJay Sternberg } 176057dacad5SJay Sternberg if (write) { 176157dacad5SJay Sternberg if (copy_from_user(meta, metadata, meta_len)) { 176257dacad5SJay Sternberg status = -EFAULT; 176357dacad5SJay Sternberg goto unmap; 176457dacad5SJay Sternberg } 176557dacad5SJay Sternberg } 176657dacad5SJay Sternberg } 176757dacad5SJay Sternberg 176857dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 176957dacad5SJay Sternberg c.rw.opcode = io.opcode; 177057dacad5SJay Sternberg c.rw.flags = io.flags; 177157dacad5SJay Sternberg c.rw.nsid = cpu_to_le32(ns->ns_id); 177257dacad5SJay Sternberg c.rw.slba = cpu_to_le64(io.slba); 177357dacad5SJay Sternberg c.rw.length = cpu_to_le16(io.nblocks); 177457dacad5SJay Sternberg c.rw.control = cpu_to_le16(io.control); 177557dacad5SJay Sternberg c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); 177657dacad5SJay Sternberg c.rw.reftag = cpu_to_le32(io.reftag); 177757dacad5SJay Sternberg c.rw.apptag = cpu_to_le16(io.apptag); 177857dacad5SJay Sternberg c.rw.appmask = cpu_to_le16(io.appmask); 177957dacad5SJay Sternberg c.rw.metadata = cpu_to_le64(meta_dma); 178057dacad5SJay Sternberg 178157dacad5SJay Sternberg status = __nvme_submit_sync_cmd(ns->queue, &c, NULL, 17823d42e67fSArnd Bergmann (void __user *)(uintptr_t)io.addr, length, NULL, 0); 178357dacad5SJay Sternberg unmap: 178457dacad5SJay Sternberg if (meta) { 178557dacad5SJay Sternberg if (status == NVME_SC_SUCCESS && !write) { 178657dacad5SJay Sternberg if (copy_to_user(metadata, meta, meta_len)) 178757dacad5SJay Sternberg status = -EFAULT; 178857dacad5SJay Sternberg } 178957dacad5SJay Sternberg dma_free_coherent(dev->dev, meta_len, meta, meta_dma); 179057dacad5SJay Sternberg } 179157dacad5SJay Sternberg return status; 179257dacad5SJay Sternberg } 179357dacad5SJay Sternberg 1794*1c63dc66SChristoph Hellwig static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns, 179557dacad5SJay Sternberg struct nvme_passthru_cmd __user *ucmd) 179657dacad5SJay Sternberg { 179757dacad5SJay Sternberg struct nvme_passthru_cmd cmd; 179857dacad5SJay Sternberg struct nvme_command c; 179957dacad5SJay Sternberg unsigned timeout = 0; 180057dacad5SJay Sternberg int status; 180157dacad5SJay Sternberg 180257dacad5SJay Sternberg if (!capable(CAP_SYS_ADMIN)) 180357dacad5SJay Sternberg return -EACCES; 180457dacad5SJay Sternberg if (copy_from_user(&cmd, ucmd, sizeof(cmd))) 180557dacad5SJay Sternberg return -EFAULT; 180657dacad5SJay Sternberg 180757dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 180857dacad5SJay Sternberg c.common.opcode = cmd.opcode; 180957dacad5SJay Sternberg c.common.flags = cmd.flags; 181057dacad5SJay Sternberg c.common.nsid = cpu_to_le32(cmd.nsid); 181157dacad5SJay Sternberg c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); 181257dacad5SJay Sternberg c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); 181357dacad5SJay Sternberg c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); 181457dacad5SJay Sternberg c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); 181557dacad5SJay Sternberg c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); 181657dacad5SJay Sternberg c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); 181757dacad5SJay Sternberg c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); 181857dacad5SJay Sternberg c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); 181957dacad5SJay Sternberg 182057dacad5SJay Sternberg if (cmd.timeout_ms) 182157dacad5SJay Sternberg timeout = msecs_to_jiffies(cmd.timeout_ms); 182257dacad5SJay Sternberg 1823*1c63dc66SChristoph Hellwig status = __nvme_submit_sync_cmd(ns ? ns->queue : ctrl->admin_q, &c, 18243d42e67fSArnd Bergmann NULL, (void __user *)(uintptr_t)cmd.addr, cmd.data_len, 182557dacad5SJay Sternberg &cmd.result, timeout); 182657dacad5SJay Sternberg if (status >= 0) { 182757dacad5SJay Sternberg if (put_user(cmd.result, &ucmd->result)) 182857dacad5SJay Sternberg return -EFAULT; 182957dacad5SJay Sternberg } 183057dacad5SJay Sternberg 183157dacad5SJay Sternberg return status; 183257dacad5SJay Sternberg } 183357dacad5SJay Sternberg 183457dacad5SJay Sternberg static int nvme_subsys_reset(struct nvme_dev *dev) 183557dacad5SJay Sternberg { 183657dacad5SJay Sternberg if (!dev->subsystem) 183757dacad5SJay Sternberg return -ENOTTY; 183857dacad5SJay Sternberg 18397a67cbeaSChristoph Hellwig writel(0x4E564D65, dev->bar + NVME_REG_NSSR); /* "NVMe" */ 184057dacad5SJay Sternberg return 0; 184157dacad5SJay Sternberg } 184257dacad5SJay Sternberg 184357dacad5SJay Sternberg static int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 184457dacad5SJay Sternberg unsigned long arg) 184557dacad5SJay Sternberg { 184657dacad5SJay Sternberg struct nvme_ns *ns = bdev->bd_disk->private_data; 184757dacad5SJay Sternberg 184857dacad5SJay Sternberg switch (cmd) { 184957dacad5SJay Sternberg case NVME_IOCTL_ID: 185057dacad5SJay Sternberg force_successful_syscall_return(); 185157dacad5SJay Sternberg return ns->ns_id; 185257dacad5SJay Sternberg case NVME_IOCTL_ADMIN_CMD: 1853*1c63dc66SChristoph Hellwig return nvme_user_cmd(ns->ctrl, NULL, (void __user *)arg); 185457dacad5SJay Sternberg case NVME_IOCTL_IO_CMD: 1855*1c63dc66SChristoph Hellwig return nvme_user_cmd(ns->ctrl, ns, (void __user *)arg); 185657dacad5SJay Sternberg case NVME_IOCTL_SUBMIT_IO: 185757dacad5SJay Sternberg return nvme_submit_io(ns, (void __user *)arg); 185857dacad5SJay Sternberg case SG_GET_VERSION_NUM: 185957dacad5SJay Sternberg return nvme_sg_get_version_num((void __user *)arg); 186057dacad5SJay Sternberg case SG_IO: 186157dacad5SJay Sternberg return nvme_sg_io(ns, (void __user *)arg); 186257dacad5SJay Sternberg default: 186357dacad5SJay Sternberg return -ENOTTY; 186457dacad5SJay Sternberg } 186557dacad5SJay Sternberg } 186657dacad5SJay Sternberg 186757dacad5SJay Sternberg #ifdef CONFIG_COMPAT 186857dacad5SJay Sternberg static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, 186957dacad5SJay Sternberg unsigned int cmd, unsigned long arg) 187057dacad5SJay Sternberg { 187157dacad5SJay Sternberg switch (cmd) { 187257dacad5SJay Sternberg case SG_IO: 187357dacad5SJay Sternberg return -ENOIOCTLCMD; 187457dacad5SJay Sternberg } 187557dacad5SJay Sternberg return nvme_ioctl(bdev, mode, cmd, arg); 187657dacad5SJay Sternberg } 187757dacad5SJay Sternberg #else 187857dacad5SJay Sternberg #define nvme_compat_ioctl NULL 187957dacad5SJay Sternberg #endif 188057dacad5SJay Sternberg 188157dacad5SJay Sternberg static void nvme_free_dev(struct kref *kref); 188257dacad5SJay Sternberg static void nvme_free_ns(struct kref *kref) 188357dacad5SJay Sternberg { 188457dacad5SJay Sternberg struct nvme_ns *ns = container_of(kref, struct nvme_ns, kref); 1885*1c63dc66SChristoph Hellwig struct nvme_dev *dev = to_nvme_dev(ns->ctrl); 188657dacad5SJay Sternberg 1887ca064085SMatias Bjørling if (ns->type == NVME_NS_LIGHTNVM) 1888ca064085SMatias Bjørling nvme_nvm_unregister(ns->queue, ns->disk->disk_name); 1889ca064085SMatias Bjørling 189057dacad5SJay Sternberg spin_lock(&dev_list_lock); 189157dacad5SJay Sternberg ns->disk->private_data = NULL; 189257dacad5SJay Sternberg spin_unlock(&dev_list_lock); 189357dacad5SJay Sternberg 1894*1c63dc66SChristoph Hellwig kref_put(&dev->kref, nvme_free_dev); 189557dacad5SJay Sternberg put_disk(ns->disk); 189657dacad5SJay Sternberg kfree(ns); 189757dacad5SJay Sternberg } 189857dacad5SJay Sternberg 189957dacad5SJay Sternberg static int nvme_open(struct block_device *bdev, fmode_t mode) 190057dacad5SJay Sternberg { 190157dacad5SJay Sternberg int ret = 0; 190257dacad5SJay Sternberg struct nvme_ns *ns; 190357dacad5SJay Sternberg 190457dacad5SJay Sternberg spin_lock(&dev_list_lock); 190557dacad5SJay Sternberg ns = bdev->bd_disk->private_data; 190657dacad5SJay Sternberg if (!ns) 190757dacad5SJay Sternberg ret = -ENXIO; 190857dacad5SJay Sternberg else if (!kref_get_unless_zero(&ns->kref)) 190957dacad5SJay Sternberg ret = -ENXIO; 191057dacad5SJay Sternberg spin_unlock(&dev_list_lock); 191157dacad5SJay Sternberg 191257dacad5SJay Sternberg return ret; 191357dacad5SJay Sternberg } 191457dacad5SJay Sternberg 191557dacad5SJay Sternberg static void nvme_release(struct gendisk *disk, fmode_t mode) 191657dacad5SJay Sternberg { 191757dacad5SJay Sternberg struct nvme_ns *ns = disk->private_data; 191857dacad5SJay Sternberg kref_put(&ns->kref, nvme_free_ns); 191957dacad5SJay Sternberg } 192057dacad5SJay Sternberg 192157dacad5SJay Sternberg static int nvme_getgeo(struct block_device *bd, struct hd_geometry *geo) 192257dacad5SJay Sternberg { 192357dacad5SJay Sternberg /* some standard values */ 192457dacad5SJay Sternberg geo->heads = 1 << 6; 192557dacad5SJay Sternberg geo->sectors = 1 << 5; 192657dacad5SJay Sternberg geo->cylinders = get_capacity(bd->bd_disk) >> 11; 192757dacad5SJay Sternberg return 0; 192857dacad5SJay Sternberg } 192957dacad5SJay Sternberg 193057dacad5SJay Sternberg static void nvme_config_discard(struct nvme_ns *ns) 193157dacad5SJay Sternberg { 193257dacad5SJay Sternberg u32 logical_block_size = queue_logical_block_size(ns->queue); 193357dacad5SJay Sternberg ns->queue->limits.discard_zeroes_data = 0; 193457dacad5SJay Sternberg ns->queue->limits.discard_alignment = logical_block_size; 193557dacad5SJay Sternberg ns->queue->limits.discard_granularity = logical_block_size; 193657dacad5SJay Sternberg blk_queue_max_discard_sectors(ns->queue, 0xffffffff); 193757dacad5SJay Sternberg queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); 193857dacad5SJay Sternberg } 193957dacad5SJay Sternberg 194057dacad5SJay Sternberg static int nvme_revalidate_disk(struct gendisk *disk) 194157dacad5SJay Sternberg { 194257dacad5SJay Sternberg struct nvme_ns *ns = disk->private_data; 1943*1c63dc66SChristoph Hellwig struct nvme_dev *dev = to_nvme_dev(ns->ctrl); 194457dacad5SJay Sternberg struct nvme_id_ns *id; 194557dacad5SJay Sternberg u8 lbaf, pi_type; 194657dacad5SJay Sternberg u16 old_ms; 194757dacad5SJay Sternberg unsigned short bs; 194857dacad5SJay Sternberg 1949*1c63dc66SChristoph Hellwig if (nvme_identify_ns(&dev->ctrl, ns->ns_id, &id)) { 195057dacad5SJay Sternberg dev_warn(dev->dev, "%s: Identify failure nvme%dn%d\n", __func__, 1951*1c63dc66SChristoph Hellwig dev->ctrl.instance, ns->ns_id); 195257dacad5SJay Sternberg return -ENODEV; 195357dacad5SJay Sternberg } 195457dacad5SJay Sternberg if (id->ncap == 0) { 195557dacad5SJay Sternberg kfree(id); 195657dacad5SJay Sternberg return -ENODEV; 195757dacad5SJay Sternberg } 195857dacad5SJay Sternberg 1959ca064085SMatias Bjørling if (nvme_nvm_ns_supported(ns, id) && ns->type != NVME_NS_LIGHTNVM) { 1960ca064085SMatias Bjørling if (nvme_nvm_register(ns->queue, disk->disk_name)) { 1961ca064085SMatias Bjørling dev_warn(dev->dev, 1962ca064085SMatias Bjørling "%s: LightNVM init failure\n", __func__); 1963ca064085SMatias Bjørling kfree(id); 1964ca064085SMatias Bjørling return -ENODEV; 1965ca064085SMatias Bjørling } 1966ca064085SMatias Bjørling ns->type = NVME_NS_LIGHTNVM; 1967ca064085SMatias Bjørling } 1968ca064085SMatias Bjørling 196957dacad5SJay Sternberg old_ms = ns->ms; 197057dacad5SJay Sternberg lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK; 197157dacad5SJay Sternberg ns->lba_shift = id->lbaf[lbaf].ds; 197257dacad5SJay Sternberg ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); 197357dacad5SJay Sternberg ns->ext = ns->ms && (id->flbas & NVME_NS_FLBAS_META_EXT); 197457dacad5SJay Sternberg 197557dacad5SJay Sternberg /* 197657dacad5SJay Sternberg * If identify namespace failed, use default 512 byte block size so 197757dacad5SJay Sternberg * block layer can use before failing read/write for 0 capacity. 197857dacad5SJay Sternberg */ 197957dacad5SJay Sternberg if (ns->lba_shift == 0) 198057dacad5SJay Sternberg ns->lba_shift = 9; 198157dacad5SJay Sternberg bs = 1 << ns->lba_shift; 198257dacad5SJay Sternberg 198357dacad5SJay Sternberg /* XXX: PI implementation requires metadata equal t10 pi tuple size */ 198457dacad5SJay Sternberg pi_type = ns->ms == sizeof(struct t10_pi_tuple) ? 198557dacad5SJay Sternberg id->dps & NVME_NS_DPS_PI_MASK : 0; 198657dacad5SJay Sternberg 19874cfc766eSDan Williams blk_mq_freeze_queue(disk->queue); 198857dacad5SJay Sternberg if (blk_get_integrity(disk) && (ns->pi_type != pi_type || 198957dacad5SJay Sternberg ns->ms != old_ms || 199057dacad5SJay Sternberg bs != queue_logical_block_size(disk->queue) || 199157dacad5SJay Sternberg (ns->ms && ns->ext))) 199257dacad5SJay Sternberg blk_integrity_unregister(disk); 199357dacad5SJay Sternberg 199457dacad5SJay Sternberg ns->pi_type = pi_type; 199557dacad5SJay Sternberg blk_queue_logical_block_size(ns->queue, bs); 199657dacad5SJay Sternberg 199725520d55SMartin K. Petersen if (ns->ms && !ns->ext) 199857dacad5SJay Sternberg nvme_init_integrity(ns); 199957dacad5SJay Sternberg 2000ca064085SMatias Bjørling if ((ns->ms && !(ns->ms == 8 && ns->pi_type) && 2001ca064085SMatias Bjørling !blk_get_integrity(disk)) || 2002ca064085SMatias Bjørling ns->type == NVME_NS_LIGHTNVM) 200357dacad5SJay Sternberg set_capacity(disk, 0); 200457dacad5SJay Sternberg else 200557dacad5SJay Sternberg set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); 200657dacad5SJay Sternberg 2007*1c63dc66SChristoph Hellwig if (dev->ctrl.oncs & NVME_CTRL_ONCS_DSM) 200857dacad5SJay Sternberg nvme_config_discard(ns); 20094cfc766eSDan Williams blk_mq_unfreeze_queue(disk->queue); 201057dacad5SJay Sternberg 201157dacad5SJay Sternberg kfree(id); 201257dacad5SJay Sternberg return 0; 201357dacad5SJay Sternberg } 201457dacad5SJay Sternberg 20151d277a63SKeith Busch static char nvme_pr_type(enum pr_type type) 20161d277a63SKeith Busch { 20171d277a63SKeith Busch switch (type) { 20181d277a63SKeith Busch case PR_WRITE_EXCLUSIVE: 20191d277a63SKeith Busch return 1; 20201d277a63SKeith Busch case PR_EXCLUSIVE_ACCESS: 20211d277a63SKeith Busch return 2; 20221d277a63SKeith Busch case PR_WRITE_EXCLUSIVE_REG_ONLY: 20231d277a63SKeith Busch return 3; 20241d277a63SKeith Busch case PR_EXCLUSIVE_ACCESS_REG_ONLY: 20251d277a63SKeith Busch return 4; 20261d277a63SKeith Busch case PR_WRITE_EXCLUSIVE_ALL_REGS: 20271d277a63SKeith Busch return 5; 20281d277a63SKeith Busch case PR_EXCLUSIVE_ACCESS_ALL_REGS: 20291d277a63SKeith Busch return 6; 20301d277a63SKeith Busch default: 20311d277a63SKeith Busch return 0; 20321d277a63SKeith Busch } 20331d277a63SKeith Busch }; 20341d277a63SKeith Busch 20351d277a63SKeith Busch static int nvme_pr_command(struct block_device *bdev, u32 cdw10, 20361d277a63SKeith Busch u64 key, u64 sa_key, u8 op) 20371d277a63SKeith Busch { 20381d277a63SKeith Busch struct nvme_ns *ns = bdev->bd_disk->private_data; 20391d277a63SKeith Busch struct nvme_command c; 20401d277a63SKeith Busch u8 data[16] = { 0, }; 20411d277a63SKeith Busch 20421d277a63SKeith Busch put_unaligned_le64(key, &data[0]); 20431d277a63SKeith Busch put_unaligned_le64(sa_key, &data[8]); 20441d277a63SKeith Busch 20451d277a63SKeith Busch memset(&c, 0, sizeof(c)); 20461d277a63SKeith Busch c.common.opcode = op; 2047a6dd1020SChristoph Hellwig c.common.nsid = cpu_to_le32(ns->ns_id); 2048a6dd1020SChristoph Hellwig c.common.cdw10[0] = cpu_to_le32(cdw10); 20491d277a63SKeith Busch 20501d277a63SKeith Busch return nvme_submit_sync_cmd(ns->queue, &c, data, 16); 20511d277a63SKeith Busch } 20521d277a63SKeith Busch 20531d277a63SKeith Busch static int nvme_pr_register(struct block_device *bdev, u64 old, 20541d277a63SKeith Busch u64 new, unsigned flags) 20551d277a63SKeith Busch { 20561d277a63SKeith Busch u32 cdw10; 20571d277a63SKeith Busch 20581d277a63SKeith Busch if (flags & ~PR_FL_IGNORE_KEY) 20591d277a63SKeith Busch return -EOPNOTSUPP; 20601d277a63SKeith Busch 20611d277a63SKeith Busch cdw10 = old ? 2 : 0; 20621d277a63SKeith Busch cdw10 |= (flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0; 20631d277a63SKeith Busch cdw10 |= (1 << 30) | (1 << 31); /* PTPL=1 */ 20641d277a63SKeith Busch return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register); 20651d277a63SKeith Busch } 20661d277a63SKeith Busch 20671d277a63SKeith Busch static int nvme_pr_reserve(struct block_device *bdev, u64 key, 20681d277a63SKeith Busch enum pr_type type, unsigned flags) 20691d277a63SKeith Busch { 20701d277a63SKeith Busch u32 cdw10; 20711d277a63SKeith Busch 20721d277a63SKeith Busch if (flags & ~PR_FL_IGNORE_KEY) 20731d277a63SKeith Busch return -EOPNOTSUPP; 20741d277a63SKeith Busch 20751d277a63SKeith Busch cdw10 = nvme_pr_type(type) << 8; 20761d277a63SKeith Busch cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0); 20771d277a63SKeith Busch return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire); 20781d277a63SKeith Busch } 20791d277a63SKeith Busch 20801d277a63SKeith Busch static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, 20811d277a63SKeith Busch enum pr_type type, bool abort) 20821d277a63SKeith Busch { 20831d277a63SKeith Busch u32 cdw10 = nvme_pr_type(type) << 8 | abort ? 2 : 1; 20841d277a63SKeith Busch return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire); 20851d277a63SKeith Busch } 20861d277a63SKeith Busch 20871d277a63SKeith Busch static int nvme_pr_clear(struct block_device *bdev, u64 key) 20881d277a63SKeith Busch { 208973fcf4e2SDan Carpenter u32 cdw10 = 1 | (key ? 1 << 3 : 0); 20901d277a63SKeith Busch return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_register); 20911d277a63SKeith Busch } 20921d277a63SKeith Busch 20931d277a63SKeith Busch static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type) 20941d277a63SKeith Busch { 20951d277a63SKeith Busch u32 cdw10 = nvme_pr_type(type) << 8 | key ? 1 << 3 : 0; 20961d277a63SKeith Busch return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); 20971d277a63SKeith Busch } 20981d277a63SKeith Busch 20991d277a63SKeith Busch static const struct pr_ops nvme_pr_ops = { 21001d277a63SKeith Busch .pr_register = nvme_pr_register, 21011d277a63SKeith Busch .pr_reserve = nvme_pr_reserve, 21021d277a63SKeith Busch .pr_release = nvme_pr_release, 21031d277a63SKeith Busch .pr_preempt = nvme_pr_preempt, 21041d277a63SKeith Busch .pr_clear = nvme_pr_clear, 21051d277a63SKeith Busch }; 21061d277a63SKeith Busch 210757dacad5SJay Sternberg static const struct block_device_operations nvme_fops = { 210857dacad5SJay Sternberg .owner = THIS_MODULE, 210957dacad5SJay Sternberg .ioctl = nvme_ioctl, 211057dacad5SJay Sternberg .compat_ioctl = nvme_compat_ioctl, 211157dacad5SJay Sternberg .open = nvme_open, 211257dacad5SJay Sternberg .release = nvme_release, 211357dacad5SJay Sternberg .getgeo = nvme_getgeo, 211457dacad5SJay Sternberg .revalidate_disk= nvme_revalidate_disk, 21151d277a63SKeith Busch .pr_ops = &nvme_pr_ops, 211657dacad5SJay Sternberg }; 211757dacad5SJay Sternberg 211857dacad5SJay Sternberg static int nvme_kthread(void *data) 211957dacad5SJay Sternberg { 212057dacad5SJay Sternberg struct nvme_dev *dev, *next; 212157dacad5SJay Sternberg 212257dacad5SJay Sternberg while (!kthread_should_stop()) { 212357dacad5SJay Sternberg set_current_state(TASK_INTERRUPTIBLE); 212457dacad5SJay Sternberg spin_lock(&dev_list_lock); 212557dacad5SJay Sternberg list_for_each_entry_safe(dev, next, &dev_list, node) { 212657dacad5SJay Sternberg int i; 21277a67cbeaSChristoph Hellwig u32 csts = readl(dev->bar + NVME_REG_CSTS); 212857dacad5SJay Sternberg 212957dacad5SJay Sternberg if ((dev->subsystem && (csts & NVME_CSTS_NSSRO)) || 213057dacad5SJay Sternberg csts & NVME_CSTS_CFS) { 213157dacad5SJay Sternberg if (!__nvme_reset(dev)) { 213257dacad5SJay Sternberg dev_warn(dev->dev, 213357dacad5SJay Sternberg "Failed status: %x, reset controller\n", 21347a67cbeaSChristoph Hellwig readl(dev->bar + NVME_REG_CSTS)); 213557dacad5SJay Sternberg } 213657dacad5SJay Sternberg continue; 213757dacad5SJay Sternberg } 213857dacad5SJay Sternberg for (i = 0; i < dev->queue_count; i++) { 213957dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 214057dacad5SJay Sternberg if (!nvmeq) 214157dacad5SJay Sternberg continue; 214257dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 214357dacad5SJay Sternberg nvme_process_cq(nvmeq); 214457dacad5SJay Sternberg 2145*1c63dc66SChristoph Hellwig while (i == 0 && dev->ctrl.event_limit > 0) { 214657dacad5SJay Sternberg if (nvme_submit_async_admin_req(dev)) 214757dacad5SJay Sternberg break; 2148*1c63dc66SChristoph Hellwig dev->ctrl.event_limit--; 214957dacad5SJay Sternberg } 215057dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 215157dacad5SJay Sternberg } 215257dacad5SJay Sternberg } 215357dacad5SJay Sternberg spin_unlock(&dev_list_lock); 215457dacad5SJay Sternberg schedule_timeout(round_jiffies_relative(HZ)); 215557dacad5SJay Sternberg } 215657dacad5SJay Sternberg return 0; 215757dacad5SJay Sternberg } 215857dacad5SJay Sternberg 215957dacad5SJay Sternberg static void nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid) 216057dacad5SJay Sternberg { 216157dacad5SJay Sternberg struct nvme_ns *ns; 216257dacad5SJay Sternberg struct gendisk *disk; 216357dacad5SJay Sternberg int node = dev_to_node(dev->dev); 216457dacad5SJay Sternberg 216557dacad5SJay Sternberg ns = kzalloc_node(sizeof(*ns), GFP_KERNEL, node); 216657dacad5SJay Sternberg if (!ns) 216757dacad5SJay Sternberg return; 216857dacad5SJay Sternberg 216957dacad5SJay Sternberg ns->queue = blk_mq_init_queue(&dev->tagset); 217057dacad5SJay Sternberg if (IS_ERR(ns->queue)) 217157dacad5SJay Sternberg goto out_free_ns; 217257dacad5SJay Sternberg queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); 217357dacad5SJay Sternberg queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); 2174*1c63dc66SChristoph Hellwig ns->ctrl = &dev->ctrl; 217557dacad5SJay Sternberg ns->queue->queuedata = ns; 217657dacad5SJay Sternberg 217757dacad5SJay Sternberg disk = alloc_disk_node(0, node); 217857dacad5SJay Sternberg if (!disk) 217957dacad5SJay Sternberg goto out_free_queue; 218057dacad5SJay Sternberg 218157dacad5SJay Sternberg kref_init(&ns->kref); 218257dacad5SJay Sternberg ns->ns_id = nsid; 218357dacad5SJay Sternberg ns->disk = disk; 218457dacad5SJay Sternberg ns->lba_shift = 9; /* set to a default value for 512 until disk is validated */ 218557dacad5SJay Sternberg list_add_tail(&ns->list, &dev->namespaces); 218657dacad5SJay Sternberg 218757dacad5SJay Sternberg blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); 218857dacad5SJay Sternberg if (dev->max_hw_sectors) { 218957dacad5SJay Sternberg blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); 219057dacad5SJay Sternberg blk_queue_max_segments(ns->queue, 21916824c5efSKeith Busch (dev->max_hw_sectors / (dev->page_size >> 9)) + 1); 219257dacad5SJay Sternberg } 219357dacad5SJay Sternberg if (dev->stripe_size) 219457dacad5SJay Sternberg blk_queue_chunk_sectors(ns->queue, dev->stripe_size >> 9); 2195*1c63dc66SChristoph Hellwig if (dev->ctrl.vwc & NVME_CTRL_VWC_PRESENT) 219657dacad5SJay Sternberg blk_queue_flush(ns->queue, REQ_FLUSH | REQ_FUA); 219757dacad5SJay Sternberg blk_queue_virt_boundary(ns->queue, dev->page_size - 1); 219857dacad5SJay Sternberg 219957dacad5SJay Sternberg disk->major = nvme_major; 220057dacad5SJay Sternberg disk->first_minor = 0; 220157dacad5SJay Sternberg disk->fops = &nvme_fops; 220257dacad5SJay Sternberg disk->private_data = ns; 220357dacad5SJay Sternberg disk->queue = ns->queue; 220457dacad5SJay Sternberg disk->driverfs_dev = dev->device; 220557dacad5SJay Sternberg disk->flags = GENHD_FL_EXT_DEVT; 2206*1c63dc66SChristoph Hellwig sprintf(disk->disk_name, "nvme%dn%d", dev->ctrl.instance, nsid); 220757dacad5SJay Sternberg 220857dacad5SJay Sternberg /* 220957dacad5SJay Sternberg * Initialize capacity to 0 until we establish the namespace format and 221057dacad5SJay Sternberg * setup integrity extentions if necessary. The revalidate_disk after 221157dacad5SJay Sternberg * add_disk allows the driver to register with integrity if the format 221257dacad5SJay Sternberg * requires it. 221357dacad5SJay Sternberg */ 221457dacad5SJay Sternberg set_capacity(disk, 0); 221557dacad5SJay Sternberg if (nvme_revalidate_disk(ns->disk)) 221657dacad5SJay Sternberg goto out_free_disk; 221757dacad5SJay Sternberg 221857dacad5SJay Sternberg kref_get(&dev->kref); 2219ca064085SMatias Bjørling if (ns->type != NVME_NS_LIGHTNVM) { 222057dacad5SJay Sternberg add_disk(ns->disk); 222157dacad5SJay Sternberg if (ns->ms) { 222257dacad5SJay Sternberg struct block_device *bd = bdget_disk(ns->disk, 0); 222357dacad5SJay Sternberg if (!bd) 222457dacad5SJay Sternberg return; 222557dacad5SJay Sternberg if (blkdev_get(bd, FMODE_READ, NULL)) { 222657dacad5SJay Sternberg bdput(bd); 222757dacad5SJay Sternberg return; 222857dacad5SJay Sternberg } 222957dacad5SJay Sternberg blkdev_reread_part(bd); 223057dacad5SJay Sternberg blkdev_put(bd, FMODE_READ); 223157dacad5SJay Sternberg } 2232ca064085SMatias Bjørling } 223357dacad5SJay Sternberg return; 223457dacad5SJay Sternberg out_free_disk: 223557dacad5SJay Sternberg kfree(disk); 223657dacad5SJay Sternberg list_del(&ns->list); 223757dacad5SJay Sternberg out_free_queue: 223857dacad5SJay Sternberg blk_cleanup_queue(ns->queue); 223957dacad5SJay Sternberg out_free_ns: 224057dacad5SJay Sternberg kfree(ns); 224157dacad5SJay Sternberg } 224257dacad5SJay Sternberg 224357dacad5SJay Sternberg /* 224457dacad5SJay Sternberg * Create I/O queues. Failing to create an I/O queue is not an issue, 224557dacad5SJay Sternberg * we can continue with less than the desired amount of queues, and 224657dacad5SJay Sternberg * even a controller without I/O queues an still be used to issue 224757dacad5SJay Sternberg * admin commands. This might be useful to upgrade a buggy firmware 224857dacad5SJay Sternberg * for example. 224957dacad5SJay Sternberg */ 225057dacad5SJay Sternberg static void nvme_create_io_queues(struct nvme_dev *dev) 225157dacad5SJay Sternberg { 225257dacad5SJay Sternberg unsigned i; 225357dacad5SJay Sternberg 225457dacad5SJay Sternberg for (i = dev->queue_count; i <= dev->max_qid; i++) 225557dacad5SJay Sternberg if (!nvme_alloc_queue(dev, i, dev->q_depth)) 225657dacad5SJay Sternberg break; 225757dacad5SJay Sternberg 225857dacad5SJay Sternberg for (i = dev->online_queues; i <= dev->queue_count - 1; i++) 225957dacad5SJay Sternberg if (nvme_create_queue(dev->queues[i], i)) { 226057dacad5SJay Sternberg nvme_free_queues(dev, i); 226157dacad5SJay Sternberg break; 226257dacad5SJay Sternberg } 226357dacad5SJay Sternberg } 226457dacad5SJay Sternberg 226557dacad5SJay Sternberg static int set_queue_count(struct nvme_dev *dev, int count) 226657dacad5SJay Sternberg { 226757dacad5SJay Sternberg int status; 226857dacad5SJay Sternberg u32 result; 226957dacad5SJay Sternberg u32 q_count = (count - 1) | ((count - 1) << 16); 227057dacad5SJay Sternberg 2271*1c63dc66SChristoph Hellwig status = nvme_set_features(&dev->ctrl, NVME_FEAT_NUM_QUEUES, q_count, 0, 227257dacad5SJay Sternberg &result); 227357dacad5SJay Sternberg if (status < 0) 227457dacad5SJay Sternberg return status; 227557dacad5SJay Sternberg if (status > 0) { 227657dacad5SJay Sternberg dev_err(dev->dev, "Could not set queue count (%d)\n", status); 227757dacad5SJay Sternberg return 0; 227857dacad5SJay Sternberg } 227957dacad5SJay Sternberg return min(result & 0xffff, result >> 16) + 1; 228057dacad5SJay Sternberg } 228157dacad5SJay Sternberg 228257dacad5SJay Sternberg static void __iomem *nvme_map_cmb(struct nvme_dev *dev) 228357dacad5SJay Sternberg { 228457dacad5SJay Sternberg u64 szu, size, offset; 228557dacad5SJay Sternberg u32 cmbloc; 228657dacad5SJay Sternberg resource_size_t bar_size; 228757dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 228857dacad5SJay Sternberg void __iomem *cmb; 228957dacad5SJay Sternberg dma_addr_t dma_addr; 229057dacad5SJay Sternberg 229157dacad5SJay Sternberg if (!use_cmb_sqes) 229257dacad5SJay Sternberg return NULL; 229357dacad5SJay Sternberg 22947a67cbeaSChristoph Hellwig dev->cmbsz = readl(dev->bar + NVME_REG_CMBSZ); 229557dacad5SJay Sternberg if (!(NVME_CMB_SZ(dev->cmbsz))) 229657dacad5SJay Sternberg return NULL; 229757dacad5SJay Sternberg 22987a67cbeaSChristoph Hellwig cmbloc = readl(dev->bar + NVME_REG_CMBLOC); 229957dacad5SJay Sternberg 230057dacad5SJay Sternberg szu = (u64)1 << (12 + 4 * NVME_CMB_SZU(dev->cmbsz)); 230157dacad5SJay Sternberg size = szu * NVME_CMB_SZ(dev->cmbsz); 230257dacad5SJay Sternberg offset = szu * NVME_CMB_OFST(cmbloc); 230357dacad5SJay Sternberg bar_size = pci_resource_len(pdev, NVME_CMB_BIR(cmbloc)); 230457dacad5SJay Sternberg 230557dacad5SJay Sternberg if (offset > bar_size) 230657dacad5SJay Sternberg return NULL; 230757dacad5SJay Sternberg 230857dacad5SJay Sternberg /* 230957dacad5SJay Sternberg * Controllers may support a CMB size larger than their BAR, 231057dacad5SJay Sternberg * for example, due to being behind a bridge. Reduce the CMB to 231157dacad5SJay Sternberg * the reported size of the BAR 231257dacad5SJay Sternberg */ 231357dacad5SJay Sternberg if (size > bar_size - offset) 231457dacad5SJay Sternberg size = bar_size - offset; 231557dacad5SJay Sternberg 231657dacad5SJay Sternberg dma_addr = pci_resource_start(pdev, NVME_CMB_BIR(cmbloc)) + offset; 231757dacad5SJay Sternberg cmb = ioremap_wc(dma_addr, size); 231857dacad5SJay Sternberg if (!cmb) 231957dacad5SJay Sternberg return NULL; 232057dacad5SJay Sternberg 232157dacad5SJay Sternberg dev->cmb_dma_addr = dma_addr; 232257dacad5SJay Sternberg dev->cmb_size = size; 232357dacad5SJay Sternberg return cmb; 232457dacad5SJay Sternberg } 232557dacad5SJay Sternberg 232657dacad5SJay Sternberg static inline void nvme_release_cmb(struct nvme_dev *dev) 232757dacad5SJay Sternberg { 232857dacad5SJay Sternberg if (dev->cmb) { 232957dacad5SJay Sternberg iounmap(dev->cmb); 233057dacad5SJay Sternberg dev->cmb = NULL; 233157dacad5SJay Sternberg } 233257dacad5SJay Sternberg } 233357dacad5SJay Sternberg 233457dacad5SJay Sternberg static size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) 233557dacad5SJay Sternberg { 233657dacad5SJay Sternberg return 4096 + ((nr_io_queues + 1) * 8 * dev->db_stride); 233757dacad5SJay Sternberg } 233857dacad5SJay Sternberg 233957dacad5SJay Sternberg static int nvme_setup_io_queues(struct nvme_dev *dev) 234057dacad5SJay Sternberg { 234157dacad5SJay Sternberg struct nvme_queue *adminq = dev->queues[0]; 234257dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 234357dacad5SJay Sternberg int result, i, vecs, nr_io_queues, size; 234457dacad5SJay Sternberg 234557dacad5SJay Sternberg nr_io_queues = num_possible_cpus(); 234657dacad5SJay Sternberg result = set_queue_count(dev, nr_io_queues); 234757dacad5SJay Sternberg if (result <= 0) 234857dacad5SJay Sternberg return result; 234957dacad5SJay Sternberg if (result < nr_io_queues) 235057dacad5SJay Sternberg nr_io_queues = result; 235157dacad5SJay Sternberg 235257dacad5SJay Sternberg if (dev->cmb && NVME_CMB_SQS(dev->cmbsz)) { 235357dacad5SJay Sternberg result = nvme_cmb_qdepth(dev, nr_io_queues, 235457dacad5SJay Sternberg sizeof(struct nvme_command)); 235557dacad5SJay Sternberg if (result > 0) 235657dacad5SJay Sternberg dev->q_depth = result; 235757dacad5SJay Sternberg else 235857dacad5SJay Sternberg nvme_release_cmb(dev); 235957dacad5SJay Sternberg } 236057dacad5SJay Sternberg 236157dacad5SJay Sternberg size = db_bar_size(dev, nr_io_queues); 236257dacad5SJay Sternberg if (size > 8192) { 236357dacad5SJay Sternberg iounmap(dev->bar); 236457dacad5SJay Sternberg do { 236557dacad5SJay Sternberg dev->bar = ioremap(pci_resource_start(pdev, 0), size); 236657dacad5SJay Sternberg if (dev->bar) 236757dacad5SJay Sternberg break; 236857dacad5SJay Sternberg if (!--nr_io_queues) 236957dacad5SJay Sternberg return -ENOMEM; 237057dacad5SJay Sternberg size = db_bar_size(dev, nr_io_queues); 237157dacad5SJay Sternberg } while (1); 23727a67cbeaSChristoph Hellwig dev->dbs = dev->bar + 4096; 237357dacad5SJay Sternberg adminq->q_db = dev->dbs; 237457dacad5SJay Sternberg } 237557dacad5SJay Sternberg 237657dacad5SJay Sternberg /* Deregister the admin queue's interrupt */ 237757dacad5SJay Sternberg free_irq(dev->entry[0].vector, adminq); 237857dacad5SJay Sternberg 237957dacad5SJay Sternberg /* 238057dacad5SJay Sternberg * If we enable msix early due to not intx, disable it again before 238157dacad5SJay Sternberg * setting up the full range we need. 238257dacad5SJay Sternberg */ 238357dacad5SJay Sternberg if (!pdev->irq) 238457dacad5SJay Sternberg pci_disable_msix(pdev); 238557dacad5SJay Sternberg 238657dacad5SJay Sternberg for (i = 0; i < nr_io_queues; i++) 238757dacad5SJay Sternberg dev->entry[i].entry = i; 238857dacad5SJay Sternberg vecs = pci_enable_msix_range(pdev, dev->entry, 1, nr_io_queues); 238957dacad5SJay Sternberg if (vecs < 0) { 239057dacad5SJay Sternberg vecs = pci_enable_msi_range(pdev, 1, min(nr_io_queues, 32)); 239157dacad5SJay Sternberg if (vecs < 0) { 239257dacad5SJay Sternberg vecs = 1; 239357dacad5SJay Sternberg } else { 239457dacad5SJay Sternberg for (i = 0; i < vecs; i++) 239557dacad5SJay Sternberg dev->entry[i].vector = i + pdev->irq; 239657dacad5SJay Sternberg } 239757dacad5SJay Sternberg } 239857dacad5SJay Sternberg 239957dacad5SJay Sternberg /* 240057dacad5SJay Sternberg * Should investigate if there's a performance win from allocating 240157dacad5SJay Sternberg * more queues than interrupt vectors; it might allow the submission 240257dacad5SJay Sternberg * path to scale better, even if the receive path is limited by the 240357dacad5SJay Sternberg * number of interrupts. 240457dacad5SJay Sternberg */ 240557dacad5SJay Sternberg nr_io_queues = vecs; 240657dacad5SJay Sternberg dev->max_qid = nr_io_queues; 240757dacad5SJay Sternberg 240857dacad5SJay Sternberg result = queue_request_irq(dev, adminq, adminq->irqname); 240957dacad5SJay Sternberg if (result) { 241057dacad5SJay Sternberg adminq->cq_vector = -1; 241157dacad5SJay Sternberg goto free_queues; 241257dacad5SJay Sternberg } 241357dacad5SJay Sternberg 241457dacad5SJay Sternberg /* Free previously allocated queues that are no longer usable */ 241557dacad5SJay Sternberg nvme_free_queues(dev, nr_io_queues + 1); 241657dacad5SJay Sternberg nvme_create_io_queues(dev); 241757dacad5SJay Sternberg 241857dacad5SJay Sternberg return 0; 241957dacad5SJay Sternberg 242057dacad5SJay Sternberg free_queues: 242157dacad5SJay Sternberg nvme_free_queues(dev, 1); 242257dacad5SJay Sternberg return result; 242357dacad5SJay Sternberg } 242457dacad5SJay Sternberg 242557dacad5SJay Sternberg static int ns_cmp(void *priv, struct list_head *a, struct list_head *b) 242657dacad5SJay Sternberg { 242757dacad5SJay Sternberg struct nvme_ns *nsa = container_of(a, struct nvme_ns, list); 242857dacad5SJay Sternberg struct nvme_ns *nsb = container_of(b, struct nvme_ns, list); 242957dacad5SJay Sternberg 243057dacad5SJay Sternberg return nsa->ns_id - nsb->ns_id; 243157dacad5SJay Sternberg } 243257dacad5SJay Sternberg 243357dacad5SJay Sternberg static struct nvme_ns *nvme_find_ns(struct nvme_dev *dev, unsigned nsid) 243457dacad5SJay Sternberg { 243557dacad5SJay Sternberg struct nvme_ns *ns; 243657dacad5SJay Sternberg 243757dacad5SJay Sternberg list_for_each_entry(ns, &dev->namespaces, list) { 243857dacad5SJay Sternberg if (ns->ns_id == nsid) 243957dacad5SJay Sternberg return ns; 244057dacad5SJay Sternberg if (ns->ns_id > nsid) 244157dacad5SJay Sternberg break; 244257dacad5SJay Sternberg } 244357dacad5SJay Sternberg return NULL; 244457dacad5SJay Sternberg } 244557dacad5SJay Sternberg 244657dacad5SJay Sternberg static inline bool nvme_io_incapable(struct nvme_dev *dev) 244757dacad5SJay Sternberg { 24487a67cbeaSChristoph Hellwig return (!dev->bar || 24497a67cbeaSChristoph Hellwig readl(dev->bar + NVME_REG_CSTS) & NVME_CSTS_CFS || 245057dacad5SJay Sternberg dev->online_queues < 2); 245157dacad5SJay Sternberg } 245257dacad5SJay Sternberg 245357dacad5SJay Sternberg static void nvme_ns_remove(struct nvme_ns *ns) 245457dacad5SJay Sternberg { 2455*1c63dc66SChristoph Hellwig bool kill = nvme_io_incapable(to_nvme_dev(ns->ctrl)) && 2456*1c63dc66SChristoph Hellwig !blk_queue_dying(ns->queue); 245757dacad5SJay Sternberg 245857dacad5SJay Sternberg if (kill) 245957dacad5SJay Sternberg blk_set_queue_dying(ns->queue); 24609609b994SDan Williams if (ns->disk->flags & GENHD_FL_UP) 246157dacad5SJay Sternberg del_gendisk(ns->disk); 246257dacad5SJay Sternberg if (kill || !blk_queue_dying(ns->queue)) { 246357dacad5SJay Sternberg blk_mq_abort_requeue_list(ns->queue); 246457dacad5SJay Sternberg blk_cleanup_queue(ns->queue); 246557dacad5SJay Sternberg } 246657dacad5SJay Sternberg list_del_init(&ns->list); 246757dacad5SJay Sternberg kref_put(&ns->kref, nvme_free_ns); 246857dacad5SJay Sternberg } 246957dacad5SJay Sternberg 247057dacad5SJay Sternberg static void nvme_scan_namespaces(struct nvme_dev *dev, unsigned nn) 247157dacad5SJay Sternberg { 247257dacad5SJay Sternberg struct nvme_ns *ns, *next; 247357dacad5SJay Sternberg unsigned i; 247457dacad5SJay Sternberg 247557dacad5SJay Sternberg for (i = 1; i <= nn; i++) { 247657dacad5SJay Sternberg ns = nvme_find_ns(dev, i); 247757dacad5SJay Sternberg if (ns) { 247857dacad5SJay Sternberg if (revalidate_disk(ns->disk)) 247957dacad5SJay Sternberg nvme_ns_remove(ns); 248057dacad5SJay Sternberg } else 248157dacad5SJay Sternberg nvme_alloc_ns(dev, i); 248257dacad5SJay Sternberg } 248357dacad5SJay Sternberg list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 248457dacad5SJay Sternberg if (ns->ns_id > nn) 248557dacad5SJay Sternberg nvme_ns_remove(ns); 248657dacad5SJay Sternberg } 248757dacad5SJay Sternberg list_sort(NULL, &dev->namespaces, ns_cmp); 248857dacad5SJay Sternberg } 248957dacad5SJay Sternberg 249057dacad5SJay Sternberg static void nvme_set_irq_hints(struct nvme_dev *dev) 249157dacad5SJay Sternberg { 249257dacad5SJay Sternberg struct nvme_queue *nvmeq; 249357dacad5SJay Sternberg int i; 249457dacad5SJay Sternberg 249557dacad5SJay Sternberg for (i = 0; i < dev->online_queues; i++) { 249657dacad5SJay Sternberg nvmeq = dev->queues[i]; 249757dacad5SJay Sternberg 249857dacad5SJay Sternberg if (!nvmeq->tags || !(*nvmeq->tags)) 249957dacad5SJay Sternberg continue; 250057dacad5SJay Sternberg 250157dacad5SJay Sternberg irq_set_affinity_hint(dev->entry[nvmeq->cq_vector].vector, 250257dacad5SJay Sternberg blk_mq_tags_cpumask(*nvmeq->tags)); 250357dacad5SJay Sternberg } 250457dacad5SJay Sternberg } 250557dacad5SJay Sternberg 250657dacad5SJay Sternberg static void nvme_dev_scan(struct work_struct *work) 250757dacad5SJay Sternberg { 250857dacad5SJay Sternberg struct nvme_dev *dev = container_of(work, struct nvme_dev, scan_work); 250957dacad5SJay Sternberg struct nvme_id_ctrl *ctrl; 251057dacad5SJay Sternberg 251157dacad5SJay Sternberg if (!dev->tagset.tags) 251257dacad5SJay Sternberg return; 2513*1c63dc66SChristoph Hellwig if (nvme_identify_ctrl(&dev->ctrl, &ctrl)) 251457dacad5SJay Sternberg return; 251557dacad5SJay Sternberg nvme_scan_namespaces(dev, le32_to_cpup(&ctrl->nn)); 251657dacad5SJay Sternberg kfree(ctrl); 251757dacad5SJay Sternberg nvme_set_irq_hints(dev); 251857dacad5SJay Sternberg } 251957dacad5SJay Sternberg 252057dacad5SJay Sternberg /* 252157dacad5SJay Sternberg * Return: error value if an error occurred setting up the queues or calling 252257dacad5SJay Sternberg * Identify Device. 0 if these succeeded, even if adding some of the 252357dacad5SJay Sternberg * namespaces failed. At the moment, these failures are silent. TBD which 252457dacad5SJay Sternberg * failures should be reported. 252557dacad5SJay Sternberg */ 252657dacad5SJay Sternberg static int nvme_dev_add(struct nvme_dev *dev) 252757dacad5SJay Sternberg { 252857dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 252957dacad5SJay Sternberg int res; 253057dacad5SJay Sternberg struct nvme_id_ctrl *ctrl; 25317a67cbeaSChristoph Hellwig int shift = NVME_CAP_MPSMIN(lo_hi_readq(dev->bar + NVME_REG_CAP)) + 12; 253257dacad5SJay Sternberg 2533*1c63dc66SChristoph Hellwig res = nvme_identify_ctrl(&dev->ctrl, &ctrl); 253457dacad5SJay Sternberg if (res) { 253557dacad5SJay Sternberg dev_err(dev->dev, "Identify Controller failed (%d)\n", res); 253657dacad5SJay Sternberg return -EIO; 253757dacad5SJay Sternberg } 253857dacad5SJay Sternberg 2539*1c63dc66SChristoph Hellwig dev->ctrl.oncs = le16_to_cpup(&ctrl->oncs); 2540*1c63dc66SChristoph Hellwig dev->ctrl.abort_limit = ctrl->acl + 1; 2541*1c63dc66SChristoph Hellwig dev->ctrl.vwc = ctrl->vwc; 2542*1c63dc66SChristoph Hellwig memcpy(dev->ctrl.serial, ctrl->sn, sizeof(ctrl->sn)); 2543*1c63dc66SChristoph Hellwig memcpy(dev->ctrl.model, ctrl->mn, sizeof(ctrl->mn)); 2544*1c63dc66SChristoph Hellwig memcpy(dev->ctrl.firmware_rev, ctrl->fr, sizeof(ctrl->fr)); 254557dacad5SJay Sternberg if (ctrl->mdts) 254657dacad5SJay Sternberg dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); 2547b12363d0SSathyavathi M else 2548b12363d0SSathyavathi M dev->max_hw_sectors = UINT_MAX; 254957dacad5SJay Sternberg if ((pdev->vendor == PCI_VENDOR_ID_INTEL) && 255057dacad5SJay Sternberg (pdev->device == 0x0953) && ctrl->vs[3]) { 255157dacad5SJay Sternberg unsigned int max_hw_sectors; 255257dacad5SJay Sternberg 255357dacad5SJay Sternberg dev->stripe_size = 1 << (ctrl->vs[3] + shift); 255457dacad5SJay Sternberg max_hw_sectors = dev->stripe_size >> (shift - 9); 255557dacad5SJay Sternberg if (dev->max_hw_sectors) { 255657dacad5SJay Sternberg dev->max_hw_sectors = min(max_hw_sectors, 255757dacad5SJay Sternberg dev->max_hw_sectors); 255857dacad5SJay Sternberg } else 255957dacad5SJay Sternberg dev->max_hw_sectors = max_hw_sectors; 256057dacad5SJay Sternberg } 256157dacad5SJay Sternberg kfree(ctrl); 256257dacad5SJay Sternberg 256357dacad5SJay Sternberg if (!dev->tagset.tags) { 256457dacad5SJay Sternberg dev->tagset.ops = &nvme_mq_ops; 256557dacad5SJay Sternberg dev->tagset.nr_hw_queues = dev->online_queues - 1; 256657dacad5SJay Sternberg dev->tagset.timeout = NVME_IO_TIMEOUT; 256757dacad5SJay Sternberg dev->tagset.numa_node = dev_to_node(dev->dev); 256857dacad5SJay Sternberg dev->tagset.queue_depth = 256957dacad5SJay Sternberg min_t(int, dev->q_depth, BLK_MQ_MAX_DEPTH) - 1; 257057dacad5SJay Sternberg dev->tagset.cmd_size = nvme_cmd_size(dev); 257157dacad5SJay Sternberg dev->tagset.flags = BLK_MQ_F_SHOULD_MERGE; 257257dacad5SJay Sternberg dev->tagset.driver_data = dev; 257357dacad5SJay Sternberg 257457dacad5SJay Sternberg if (blk_mq_alloc_tag_set(&dev->tagset)) 257557dacad5SJay Sternberg return 0; 257657dacad5SJay Sternberg } 257757dacad5SJay Sternberg schedule_work(&dev->scan_work); 257857dacad5SJay Sternberg return 0; 257957dacad5SJay Sternberg } 258057dacad5SJay Sternberg 258157dacad5SJay Sternberg static int nvme_dev_map(struct nvme_dev *dev) 258257dacad5SJay Sternberg { 258357dacad5SJay Sternberg u64 cap; 258457dacad5SJay Sternberg int bars, result = -ENOMEM; 258557dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 258657dacad5SJay Sternberg 258757dacad5SJay Sternberg if (pci_enable_device_mem(pdev)) 258857dacad5SJay Sternberg return result; 258957dacad5SJay Sternberg 259057dacad5SJay Sternberg dev->entry[0].vector = pdev->irq; 259157dacad5SJay Sternberg pci_set_master(pdev); 259257dacad5SJay Sternberg bars = pci_select_bars(pdev, IORESOURCE_MEM); 259357dacad5SJay Sternberg if (!bars) 259457dacad5SJay Sternberg goto disable_pci; 259557dacad5SJay Sternberg 259657dacad5SJay Sternberg if (pci_request_selected_regions(pdev, bars, "nvme")) 259757dacad5SJay Sternberg goto disable_pci; 259857dacad5SJay Sternberg 259957dacad5SJay Sternberg if (dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(64)) && 260057dacad5SJay Sternberg dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(32))) 260157dacad5SJay Sternberg goto disable; 260257dacad5SJay Sternberg 260357dacad5SJay Sternberg dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 260457dacad5SJay Sternberg if (!dev->bar) 260557dacad5SJay Sternberg goto disable; 260657dacad5SJay Sternberg 26077a67cbeaSChristoph Hellwig if (readl(dev->bar + NVME_REG_CSTS) == -1) { 260857dacad5SJay Sternberg result = -ENODEV; 260957dacad5SJay Sternberg goto unmap; 261057dacad5SJay Sternberg } 261157dacad5SJay Sternberg 261257dacad5SJay Sternberg /* 261357dacad5SJay Sternberg * Some devices don't advertse INTx interrupts, pre-enable a single 261457dacad5SJay Sternberg * MSIX vec for setup. We'll adjust this later. 261557dacad5SJay Sternberg */ 261657dacad5SJay Sternberg if (!pdev->irq) { 261757dacad5SJay Sternberg result = pci_enable_msix(pdev, dev->entry, 1); 261857dacad5SJay Sternberg if (result < 0) 261957dacad5SJay Sternberg goto unmap; 262057dacad5SJay Sternberg } 262157dacad5SJay Sternberg 26227a67cbeaSChristoph Hellwig cap = lo_hi_readq(dev->bar + NVME_REG_CAP); 26237a67cbeaSChristoph Hellwig 262457dacad5SJay Sternberg dev->q_depth = min_t(int, NVME_CAP_MQES(cap) + 1, NVME_Q_DEPTH); 262557dacad5SJay Sternberg dev->db_stride = 1 << NVME_CAP_STRIDE(cap); 26267a67cbeaSChristoph Hellwig dev->dbs = dev->bar + 4096; 26277a67cbeaSChristoph Hellwig if (readl(dev->bar + NVME_REG_VS) >= NVME_VS(1, 2)) 262857dacad5SJay Sternberg dev->cmb = nvme_map_cmb(dev); 262957dacad5SJay Sternberg 263057dacad5SJay Sternberg return 0; 263157dacad5SJay Sternberg 263257dacad5SJay Sternberg unmap: 263357dacad5SJay Sternberg iounmap(dev->bar); 263457dacad5SJay Sternberg dev->bar = NULL; 263557dacad5SJay Sternberg disable: 263657dacad5SJay Sternberg pci_release_regions(pdev); 263757dacad5SJay Sternberg disable_pci: 263857dacad5SJay Sternberg pci_disable_device(pdev); 263957dacad5SJay Sternberg return result; 264057dacad5SJay Sternberg } 264157dacad5SJay Sternberg 264257dacad5SJay Sternberg static void nvme_dev_unmap(struct nvme_dev *dev) 264357dacad5SJay Sternberg { 264457dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 264557dacad5SJay Sternberg 264657dacad5SJay Sternberg if (pdev->msi_enabled) 264757dacad5SJay Sternberg pci_disable_msi(pdev); 264857dacad5SJay Sternberg else if (pdev->msix_enabled) 264957dacad5SJay Sternberg pci_disable_msix(pdev); 265057dacad5SJay Sternberg 265157dacad5SJay Sternberg if (dev->bar) { 265257dacad5SJay Sternberg iounmap(dev->bar); 265357dacad5SJay Sternberg dev->bar = NULL; 265457dacad5SJay Sternberg pci_release_regions(pdev); 265557dacad5SJay Sternberg } 265657dacad5SJay Sternberg 265757dacad5SJay Sternberg if (pci_is_enabled(pdev)) 265857dacad5SJay Sternberg pci_disable_device(pdev); 265957dacad5SJay Sternberg } 266057dacad5SJay Sternberg 266157dacad5SJay Sternberg struct nvme_delq_ctx { 266257dacad5SJay Sternberg struct task_struct *waiter; 266357dacad5SJay Sternberg struct kthread_worker *worker; 266457dacad5SJay Sternberg atomic_t refcount; 266557dacad5SJay Sternberg }; 266657dacad5SJay Sternberg 266757dacad5SJay Sternberg static void nvme_wait_dq(struct nvme_delq_ctx *dq, struct nvme_dev *dev) 266857dacad5SJay Sternberg { 266957dacad5SJay Sternberg dq->waiter = current; 267057dacad5SJay Sternberg mb(); 267157dacad5SJay Sternberg 267257dacad5SJay Sternberg for (;;) { 267357dacad5SJay Sternberg set_current_state(TASK_KILLABLE); 267457dacad5SJay Sternberg if (!atomic_read(&dq->refcount)) 267557dacad5SJay Sternberg break; 267657dacad5SJay Sternberg if (!schedule_timeout(ADMIN_TIMEOUT) || 267757dacad5SJay Sternberg fatal_signal_pending(current)) { 267857dacad5SJay Sternberg /* 267957dacad5SJay Sternberg * Disable the controller first since we can't trust it 268057dacad5SJay Sternberg * at this point, but leave the admin queue enabled 268157dacad5SJay Sternberg * until all queue deletion requests are flushed. 268257dacad5SJay Sternberg * FIXME: This may take a while if there are more h/w 268357dacad5SJay Sternberg * queues than admin tags. 268457dacad5SJay Sternberg */ 268557dacad5SJay Sternberg set_current_state(TASK_RUNNING); 26867a67cbeaSChristoph Hellwig nvme_disable_ctrl(dev, 26877a67cbeaSChristoph Hellwig lo_hi_readq(dev->bar + NVME_REG_CAP)); 268857dacad5SJay Sternberg nvme_clear_queue(dev->queues[0]); 268957dacad5SJay Sternberg flush_kthread_worker(dq->worker); 269057dacad5SJay Sternberg nvme_disable_queue(dev, 0); 269157dacad5SJay Sternberg return; 269257dacad5SJay Sternberg } 269357dacad5SJay Sternberg } 269457dacad5SJay Sternberg set_current_state(TASK_RUNNING); 269557dacad5SJay Sternberg } 269657dacad5SJay Sternberg 269757dacad5SJay Sternberg static void nvme_put_dq(struct nvme_delq_ctx *dq) 269857dacad5SJay Sternberg { 269957dacad5SJay Sternberg atomic_dec(&dq->refcount); 270057dacad5SJay Sternberg if (dq->waiter) 270157dacad5SJay Sternberg wake_up_process(dq->waiter); 270257dacad5SJay Sternberg } 270357dacad5SJay Sternberg 270457dacad5SJay Sternberg static struct nvme_delq_ctx *nvme_get_dq(struct nvme_delq_ctx *dq) 270557dacad5SJay Sternberg { 270657dacad5SJay Sternberg atomic_inc(&dq->refcount); 270757dacad5SJay Sternberg return dq; 270857dacad5SJay Sternberg } 270957dacad5SJay Sternberg 271057dacad5SJay Sternberg static void nvme_del_queue_end(struct nvme_queue *nvmeq) 271157dacad5SJay Sternberg { 271257dacad5SJay Sternberg struct nvme_delq_ctx *dq = nvmeq->cmdinfo.ctx; 271357dacad5SJay Sternberg nvme_put_dq(dq); 2714604e8c8dSKeith Busch 2715604e8c8dSKeith Busch spin_lock_irq(&nvmeq->q_lock); 2716604e8c8dSKeith Busch nvme_process_cq(nvmeq); 2717604e8c8dSKeith Busch spin_unlock_irq(&nvmeq->q_lock); 271857dacad5SJay Sternberg } 271957dacad5SJay Sternberg 272057dacad5SJay Sternberg static int adapter_async_del_queue(struct nvme_queue *nvmeq, u8 opcode, 272157dacad5SJay Sternberg kthread_work_func_t fn) 272257dacad5SJay Sternberg { 272357dacad5SJay Sternberg struct nvme_command c; 272457dacad5SJay Sternberg 272557dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 272657dacad5SJay Sternberg c.delete_queue.opcode = opcode; 272757dacad5SJay Sternberg c.delete_queue.qid = cpu_to_le16(nvmeq->qid); 272857dacad5SJay Sternberg 272957dacad5SJay Sternberg init_kthread_work(&nvmeq->cmdinfo.work, fn); 273057dacad5SJay Sternberg return nvme_submit_admin_async_cmd(nvmeq->dev, &c, &nvmeq->cmdinfo, 273157dacad5SJay Sternberg ADMIN_TIMEOUT); 273257dacad5SJay Sternberg } 273357dacad5SJay Sternberg 273457dacad5SJay Sternberg static void nvme_del_cq_work_handler(struct kthread_work *work) 273557dacad5SJay Sternberg { 273657dacad5SJay Sternberg struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 273757dacad5SJay Sternberg cmdinfo.work); 273857dacad5SJay Sternberg nvme_del_queue_end(nvmeq); 273957dacad5SJay Sternberg } 274057dacad5SJay Sternberg 274157dacad5SJay Sternberg static int nvme_delete_cq(struct nvme_queue *nvmeq) 274257dacad5SJay Sternberg { 274357dacad5SJay Sternberg return adapter_async_del_queue(nvmeq, nvme_admin_delete_cq, 274457dacad5SJay Sternberg nvme_del_cq_work_handler); 274557dacad5SJay Sternberg } 274657dacad5SJay Sternberg 274757dacad5SJay Sternberg static void nvme_del_sq_work_handler(struct kthread_work *work) 274857dacad5SJay Sternberg { 274957dacad5SJay Sternberg struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 275057dacad5SJay Sternberg cmdinfo.work); 275157dacad5SJay Sternberg int status = nvmeq->cmdinfo.status; 275257dacad5SJay Sternberg 275357dacad5SJay Sternberg if (!status) 275457dacad5SJay Sternberg status = nvme_delete_cq(nvmeq); 275557dacad5SJay Sternberg if (status) 275657dacad5SJay Sternberg nvme_del_queue_end(nvmeq); 275757dacad5SJay Sternberg } 275857dacad5SJay Sternberg 275957dacad5SJay Sternberg static int nvme_delete_sq(struct nvme_queue *nvmeq) 276057dacad5SJay Sternberg { 276157dacad5SJay Sternberg return adapter_async_del_queue(nvmeq, nvme_admin_delete_sq, 276257dacad5SJay Sternberg nvme_del_sq_work_handler); 276357dacad5SJay Sternberg } 276457dacad5SJay Sternberg 276557dacad5SJay Sternberg static void nvme_del_queue_start(struct kthread_work *work) 276657dacad5SJay Sternberg { 276757dacad5SJay Sternberg struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 276857dacad5SJay Sternberg cmdinfo.work); 276957dacad5SJay Sternberg if (nvme_delete_sq(nvmeq)) 277057dacad5SJay Sternberg nvme_del_queue_end(nvmeq); 277157dacad5SJay Sternberg } 277257dacad5SJay Sternberg 277357dacad5SJay Sternberg static void nvme_disable_io_queues(struct nvme_dev *dev) 277457dacad5SJay Sternberg { 277557dacad5SJay Sternberg int i; 277657dacad5SJay Sternberg DEFINE_KTHREAD_WORKER_ONSTACK(worker); 277757dacad5SJay Sternberg struct nvme_delq_ctx dq; 277857dacad5SJay Sternberg struct task_struct *kworker_task = kthread_run(kthread_worker_fn, 2779*1c63dc66SChristoph Hellwig &worker, "nvme%d", dev->ctrl.instance); 278057dacad5SJay Sternberg 278157dacad5SJay Sternberg if (IS_ERR(kworker_task)) { 278257dacad5SJay Sternberg dev_err(dev->dev, 278357dacad5SJay Sternberg "Failed to create queue del task\n"); 278457dacad5SJay Sternberg for (i = dev->queue_count - 1; i > 0; i--) 278557dacad5SJay Sternberg nvme_disable_queue(dev, i); 278657dacad5SJay Sternberg return; 278757dacad5SJay Sternberg } 278857dacad5SJay Sternberg 278957dacad5SJay Sternberg dq.waiter = NULL; 279057dacad5SJay Sternberg atomic_set(&dq.refcount, 0); 279157dacad5SJay Sternberg dq.worker = &worker; 279257dacad5SJay Sternberg for (i = dev->queue_count - 1; i > 0; i--) { 279357dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 279457dacad5SJay Sternberg 279557dacad5SJay Sternberg if (nvme_suspend_queue(nvmeq)) 279657dacad5SJay Sternberg continue; 279757dacad5SJay Sternberg nvmeq->cmdinfo.ctx = nvme_get_dq(&dq); 279857dacad5SJay Sternberg nvmeq->cmdinfo.worker = dq.worker; 279957dacad5SJay Sternberg init_kthread_work(&nvmeq->cmdinfo.work, nvme_del_queue_start); 280057dacad5SJay Sternberg queue_kthread_work(dq.worker, &nvmeq->cmdinfo.work); 280157dacad5SJay Sternberg } 280257dacad5SJay Sternberg nvme_wait_dq(&dq, dev); 280357dacad5SJay Sternberg kthread_stop(kworker_task); 280457dacad5SJay Sternberg } 280557dacad5SJay Sternberg 280657dacad5SJay Sternberg /* 280757dacad5SJay Sternberg * Remove the node from the device list and check 280857dacad5SJay Sternberg * for whether or not we need to stop the nvme_thread. 280957dacad5SJay Sternberg */ 281057dacad5SJay Sternberg static void nvme_dev_list_remove(struct nvme_dev *dev) 281157dacad5SJay Sternberg { 281257dacad5SJay Sternberg struct task_struct *tmp = NULL; 281357dacad5SJay Sternberg 281457dacad5SJay Sternberg spin_lock(&dev_list_lock); 281557dacad5SJay Sternberg list_del_init(&dev->node); 281657dacad5SJay Sternberg if (list_empty(&dev_list) && !IS_ERR_OR_NULL(nvme_thread)) { 281757dacad5SJay Sternberg tmp = nvme_thread; 281857dacad5SJay Sternberg nvme_thread = NULL; 281957dacad5SJay Sternberg } 282057dacad5SJay Sternberg spin_unlock(&dev_list_lock); 282157dacad5SJay Sternberg 282257dacad5SJay Sternberg if (tmp) 282357dacad5SJay Sternberg kthread_stop(tmp); 282457dacad5SJay Sternberg } 282557dacad5SJay Sternberg 282657dacad5SJay Sternberg static void nvme_freeze_queues(struct nvme_dev *dev) 282757dacad5SJay Sternberg { 282857dacad5SJay Sternberg struct nvme_ns *ns; 282957dacad5SJay Sternberg 283057dacad5SJay Sternberg list_for_each_entry(ns, &dev->namespaces, list) { 283157dacad5SJay Sternberg blk_mq_freeze_queue_start(ns->queue); 283257dacad5SJay Sternberg 283357dacad5SJay Sternberg spin_lock_irq(ns->queue->queue_lock); 283457dacad5SJay Sternberg queue_flag_set(QUEUE_FLAG_STOPPED, ns->queue); 283557dacad5SJay Sternberg spin_unlock_irq(ns->queue->queue_lock); 283657dacad5SJay Sternberg 283757dacad5SJay Sternberg blk_mq_cancel_requeue_work(ns->queue); 283857dacad5SJay Sternberg blk_mq_stop_hw_queues(ns->queue); 283957dacad5SJay Sternberg } 284057dacad5SJay Sternberg } 284157dacad5SJay Sternberg 284257dacad5SJay Sternberg static void nvme_unfreeze_queues(struct nvme_dev *dev) 284357dacad5SJay Sternberg { 284457dacad5SJay Sternberg struct nvme_ns *ns; 284557dacad5SJay Sternberg 284657dacad5SJay Sternberg list_for_each_entry(ns, &dev->namespaces, list) { 284757dacad5SJay Sternberg queue_flag_clear_unlocked(QUEUE_FLAG_STOPPED, ns->queue); 284857dacad5SJay Sternberg blk_mq_unfreeze_queue(ns->queue); 284957dacad5SJay Sternberg blk_mq_start_stopped_hw_queues(ns->queue, true); 285057dacad5SJay Sternberg blk_mq_kick_requeue_list(ns->queue); 285157dacad5SJay Sternberg } 285257dacad5SJay Sternberg } 285357dacad5SJay Sternberg 285457dacad5SJay Sternberg static void nvme_dev_shutdown(struct nvme_dev *dev) 285557dacad5SJay Sternberg { 285657dacad5SJay Sternberg int i; 285757dacad5SJay Sternberg u32 csts = -1; 285857dacad5SJay Sternberg 285957dacad5SJay Sternberg nvme_dev_list_remove(dev); 286057dacad5SJay Sternberg 286157dacad5SJay Sternberg if (dev->bar) { 286257dacad5SJay Sternberg nvme_freeze_queues(dev); 28637a67cbeaSChristoph Hellwig csts = readl(dev->bar + NVME_REG_CSTS); 286457dacad5SJay Sternberg } 286557dacad5SJay Sternberg if (csts & NVME_CSTS_CFS || !(csts & NVME_CSTS_RDY)) { 286657dacad5SJay Sternberg for (i = dev->queue_count - 1; i >= 0; i--) { 286757dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 286857dacad5SJay Sternberg nvme_suspend_queue(nvmeq); 286957dacad5SJay Sternberg } 287057dacad5SJay Sternberg } else { 287157dacad5SJay Sternberg nvme_disable_io_queues(dev); 287257dacad5SJay Sternberg nvme_shutdown_ctrl(dev); 287357dacad5SJay Sternberg nvme_disable_queue(dev, 0); 287457dacad5SJay Sternberg } 287557dacad5SJay Sternberg nvme_dev_unmap(dev); 287657dacad5SJay Sternberg 287757dacad5SJay Sternberg for (i = dev->queue_count - 1; i >= 0; i--) 287857dacad5SJay Sternberg nvme_clear_queue(dev->queues[i]); 287957dacad5SJay Sternberg } 288057dacad5SJay Sternberg 288157dacad5SJay Sternberg static void nvme_dev_remove(struct nvme_dev *dev) 288257dacad5SJay Sternberg { 288357dacad5SJay Sternberg struct nvme_ns *ns, *next; 288457dacad5SJay Sternberg 288557dacad5SJay Sternberg list_for_each_entry_safe(ns, next, &dev->namespaces, list) 288657dacad5SJay Sternberg nvme_ns_remove(ns); 288757dacad5SJay Sternberg } 288857dacad5SJay Sternberg 288957dacad5SJay Sternberg static int nvme_setup_prp_pools(struct nvme_dev *dev) 289057dacad5SJay Sternberg { 289157dacad5SJay Sternberg dev->prp_page_pool = dma_pool_create("prp list page", dev->dev, 289257dacad5SJay Sternberg PAGE_SIZE, PAGE_SIZE, 0); 289357dacad5SJay Sternberg if (!dev->prp_page_pool) 289457dacad5SJay Sternberg return -ENOMEM; 289557dacad5SJay Sternberg 289657dacad5SJay Sternberg /* Optimisation for I/Os between 4k and 128k */ 289757dacad5SJay Sternberg dev->prp_small_pool = dma_pool_create("prp list 256", dev->dev, 289857dacad5SJay Sternberg 256, 256, 0); 289957dacad5SJay Sternberg if (!dev->prp_small_pool) { 290057dacad5SJay Sternberg dma_pool_destroy(dev->prp_page_pool); 290157dacad5SJay Sternberg return -ENOMEM; 290257dacad5SJay Sternberg } 290357dacad5SJay Sternberg return 0; 290457dacad5SJay Sternberg } 290557dacad5SJay Sternberg 290657dacad5SJay Sternberg static void nvme_release_prp_pools(struct nvme_dev *dev) 290757dacad5SJay Sternberg { 290857dacad5SJay Sternberg dma_pool_destroy(dev->prp_page_pool); 290957dacad5SJay Sternberg dma_pool_destroy(dev->prp_small_pool); 291057dacad5SJay Sternberg } 291157dacad5SJay Sternberg 291257dacad5SJay Sternberg static DEFINE_IDA(nvme_instance_ida); 291357dacad5SJay Sternberg 291457dacad5SJay Sternberg static int nvme_set_instance(struct nvme_dev *dev) 291557dacad5SJay Sternberg { 291657dacad5SJay Sternberg int instance, error; 291757dacad5SJay Sternberg 291857dacad5SJay Sternberg do { 291957dacad5SJay Sternberg if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) 292057dacad5SJay Sternberg return -ENODEV; 292157dacad5SJay Sternberg 292257dacad5SJay Sternberg spin_lock(&dev_list_lock); 292357dacad5SJay Sternberg error = ida_get_new(&nvme_instance_ida, &instance); 292457dacad5SJay Sternberg spin_unlock(&dev_list_lock); 292557dacad5SJay Sternberg } while (error == -EAGAIN); 292657dacad5SJay Sternberg 292757dacad5SJay Sternberg if (error) 292857dacad5SJay Sternberg return -ENODEV; 292957dacad5SJay Sternberg 2930*1c63dc66SChristoph Hellwig dev->ctrl.instance = instance; 293157dacad5SJay Sternberg return 0; 293257dacad5SJay Sternberg } 293357dacad5SJay Sternberg 293457dacad5SJay Sternberg static void nvme_release_instance(struct nvme_dev *dev) 293557dacad5SJay Sternberg { 293657dacad5SJay Sternberg spin_lock(&dev_list_lock); 2937*1c63dc66SChristoph Hellwig ida_remove(&nvme_instance_ida, dev->ctrl.instance); 293857dacad5SJay Sternberg spin_unlock(&dev_list_lock); 293957dacad5SJay Sternberg } 294057dacad5SJay Sternberg 294157dacad5SJay Sternberg static void nvme_free_dev(struct kref *kref) 294257dacad5SJay Sternberg { 294357dacad5SJay Sternberg struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref); 294457dacad5SJay Sternberg 294557dacad5SJay Sternberg put_device(dev->dev); 294657dacad5SJay Sternberg put_device(dev->device); 294757dacad5SJay Sternberg nvme_release_instance(dev); 294857dacad5SJay Sternberg if (dev->tagset.tags) 294957dacad5SJay Sternberg blk_mq_free_tag_set(&dev->tagset); 2950*1c63dc66SChristoph Hellwig if (dev->ctrl.admin_q) 2951*1c63dc66SChristoph Hellwig blk_put_queue(dev->ctrl.admin_q); 295257dacad5SJay Sternberg kfree(dev->queues); 295357dacad5SJay Sternberg kfree(dev->entry); 295457dacad5SJay Sternberg kfree(dev); 295557dacad5SJay Sternberg } 295657dacad5SJay Sternberg 295757dacad5SJay Sternberg static int nvme_dev_open(struct inode *inode, struct file *f) 295857dacad5SJay Sternberg { 295957dacad5SJay Sternberg struct nvme_dev *dev; 296057dacad5SJay Sternberg int instance = iminor(inode); 296157dacad5SJay Sternberg int ret = -ENODEV; 296257dacad5SJay Sternberg 296357dacad5SJay Sternberg spin_lock(&dev_list_lock); 296457dacad5SJay Sternberg list_for_each_entry(dev, &dev_list, node) { 2965*1c63dc66SChristoph Hellwig if (dev->ctrl.instance == instance) { 2966*1c63dc66SChristoph Hellwig if (!dev->ctrl.admin_q) { 296757dacad5SJay Sternberg ret = -EWOULDBLOCK; 296857dacad5SJay Sternberg break; 296957dacad5SJay Sternberg } 297057dacad5SJay Sternberg if (!kref_get_unless_zero(&dev->kref)) 297157dacad5SJay Sternberg break; 297257dacad5SJay Sternberg f->private_data = dev; 297357dacad5SJay Sternberg ret = 0; 297457dacad5SJay Sternberg break; 297557dacad5SJay Sternberg } 297657dacad5SJay Sternberg } 297757dacad5SJay Sternberg spin_unlock(&dev_list_lock); 297857dacad5SJay Sternberg 297957dacad5SJay Sternberg return ret; 298057dacad5SJay Sternberg } 298157dacad5SJay Sternberg 298257dacad5SJay Sternberg static int nvme_dev_release(struct inode *inode, struct file *f) 298357dacad5SJay Sternberg { 298457dacad5SJay Sternberg struct nvme_dev *dev = f->private_data; 298557dacad5SJay Sternberg kref_put(&dev->kref, nvme_free_dev); 298657dacad5SJay Sternberg return 0; 298757dacad5SJay Sternberg } 298857dacad5SJay Sternberg 298957dacad5SJay Sternberg static long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg) 299057dacad5SJay Sternberg { 299157dacad5SJay Sternberg struct nvme_dev *dev = f->private_data; 299257dacad5SJay Sternberg struct nvme_ns *ns; 299357dacad5SJay Sternberg 299457dacad5SJay Sternberg switch (cmd) { 299557dacad5SJay Sternberg case NVME_IOCTL_ADMIN_CMD: 2996*1c63dc66SChristoph Hellwig return nvme_user_cmd(&dev->ctrl, NULL, (void __user *)arg); 299757dacad5SJay Sternberg case NVME_IOCTL_IO_CMD: 299857dacad5SJay Sternberg if (list_empty(&dev->namespaces)) 299957dacad5SJay Sternberg return -ENOTTY; 300057dacad5SJay Sternberg ns = list_first_entry(&dev->namespaces, struct nvme_ns, list); 3001*1c63dc66SChristoph Hellwig return nvme_user_cmd(&dev->ctrl, ns, (void __user *)arg); 300257dacad5SJay Sternberg case NVME_IOCTL_RESET: 300357dacad5SJay Sternberg dev_warn(dev->dev, "resetting controller\n"); 300457dacad5SJay Sternberg return nvme_reset(dev); 300557dacad5SJay Sternberg case NVME_IOCTL_SUBSYS_RESET: 300657dacad5SJay Sternberg return nvme_subsys_reset(dev); 300757dacad5SJay Sternberg default: 300857dacad5SJay Sternberg return -ENOTTY; 300957dacad5SJay Sternberg } 301057dacad5SJay Sternberg } 301157dacad5SJay Sternberg 301257dacad5SJay Sternberg static const struct file_operations nvme_dev_fops = { 301357dacad5SJay Sternberg .owner = THIS_MODULE, 301457dacad5SJay Sternberg .open = nvme_dev_open, 301557dacad5SJay Sternberg .release = nvme_dev_release, 301657dacad5SJay Sternberg .unlocked_ioctl = nvme_dev_ioctl, 301757dacad5SJay Sternberg .compat_ioctl = nvme_dev_ioctl, 301857dacad5SJay Sternberg }; 301957dacad5SJay Sternberg 302057dacad5SJay Sternberg static void nvme_probe_work(struct work_struct *work) 302157dacad5SJay Sternberg { 302257dacad5SJay Sternberg struct nvme_dev *dev = container_of(work, struct nvme_dev, probe_work); 302357dacad5SJay Sternberg bool start_thread = false; 302457dacad5SJay Sternberg int result; 302557dacad5SJay Sternberg 302657dacad5SJay Sternberg result = nvme_dev_map(dev); 302757dacad5SJay Sternberg if (result) 302857dacad5SJay Sternberg goto out; 302957dacad5SJay Sternberg 303057dacad5SJay Sternberg result = nvme_configure_admin_queue(dev); 303157dacad5SJay Sternberg if (result) 303257dacad5SJay Sternberg goto unmap; 303357dacad5SJay Sternberg 303457dacad5SJay Sternberg spin_lock(&dev_list_lock); 303557dacad5SJay Sternberg if (list_empty(&dev_list) && IS_ERR_OR_NULL(nvme_thread)) { 303657dacad5SJay Sternberg start_thread = true; 303757dacad5SJay Sternberg nvme_thread = NULL; 303857dacad5SJay Sternberg } 303957dacad5SJay Sternberg list_add(&dev->node, &dev_list); 304057dacad5SJay Sternberg spin_unlock(&dev_list_lock); 304157dacad5SJay Sternberg 304257dacad5SJay Sternberg if (start_thread) { 304357dacad5SJay Sternberg nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 304457dacad5SJay Sternberg wake_up_all(&nvme_kthread_wait); 304557dacad5SJay Sternberg } else 304657dacad5SJay Sternberg wait_event_killable(nvme_kthread_wait, nvme_thread); 304757dacad5SJay Sternberg 304857dacad5SJay Sternberg if (IS_ERR_OR_NULL(nvme_thread)) { 304957dacad5SJay Sternberg result = nvme_thread ? PTR_ERR(nvme_thread) : -EINTR; 305057dacad5SJay Sternberg goto disable; 305157dacad5SJay Sternberg } 305257dacad5SJay Sternberg 305357dacad5SJay Sternberg nvme_init_queue(dev->queues[0], 0); 305457dacad5SJay Sternberg result = nvme_alloc_admin_tags(dev); 305557dacad5SJay Sternberg if (result) 305657dacad5SJay Sternberg goto disable; 305757dacad5SJay Sternberg 305857dacad5SJay Sternberg result = nvme_setup_io_queues(dev); 305957dacad5SJay Sternberg if (result) 306057dacad5SJay Sternberg goto free_tags; 306157dacad5SJay Sternberg 3062*1c63dc66SChristoph Hellwig dev->ctrl.event_limit = 1; 306357dacad5SJay Sternberg 306457dacad5SJay Sternberg /* 306557dacad5SJay Sternberg * Keep the controller around but remove all namespaces if we don't have 306657dacad5SJay Sternberg * any working I/O queue. 306757dacad5SJay Sternberg */ 306857dacad5SJay Sternberg if (dev->online_queues < 2) { 306957dacad5SJay Sternberg dev_warn(dev->dev, "IO queues not created\n"); 307057dacad5SJay Sternberg nvme_dev_remove(dev); 307157dacad5SJay Sternberg } else { 307257dacad5SJay Sternberg nvme_unfreeze_queues(dev); 307357dacad5SJay Sternberg nvme_dev_add(dev); 307457dacad5SJay Sternberg } 307557dacad5SJay Sternberg 307657dacad5SJay Sternberg return; 307757dacad5SJay Sternberg 307857dacad5SJay Sternberg free_tags: 307957dacad5SJay Sternberg nvme_dev_remove_admin(dev); 3080*1c63dc66SChristoph Hellwig blk_put_queue(dev->ctrl.admin_q); 3081*1c63dc66SChristoph Hellwig dev->ctrl.admin_q = NULL; 308257dacad5SJay Sternberg dev->queues[0]->tags = NULL; 308357dacad5SJay Sternberg disable: 308457dacad5SJay Sternberg nvme_disable_queue(dev, 0); 308557dacad5SJay Sternberg nvme_dev_list_remove(dev); 308657dacad5SJay Sternberg unmap: 308757dacad5SJay Sternberg nvme_dev_unmap(dev); 308857dacad5SJay Sternberg out: 308957dacad5SJay Sternberg if (!work_busy(&dev->reset_work)) 309057dacad5SJay Sternberg nvme_dead_ctrl(dev); 309157dacad5SJay Sternberg } 309257dacad5SJay Sternberg 309357dacad5SJay Sternberg static int nvme_remove_dead_ctrl(void *arg) 309457dacad5SJay Sternberg { 309557dacad5SJay Sternberg struct nvme_dev *dev = (struct nvme_dev *)arg; 309657dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 309757dacad5SJay Sternberg 309857dacad5SJay Sternberg if (pci_get_drvdata(pdev)) 309957dacad5SJay Sternberg pci_stop_and_remove_bus_device_locked(pdev); 310057dacad5SJay Sternberg kref_put(&dev->kref, nvme_free_dev); 310157dacad5SJay Sternberg return 0; 310257dacad5SJay Sternberg } 310357dacad5SJay Sternberg 310457dacad5SJay Sternberg static void nvme_dead_ctrl(struct nvme_dev *dev) 310557dacad5SJay Sternberg { 310657dacad5SJay Sternberg dev_warn(dev->dev, "Device failed to resume\n"); 310757dacad5SJay Sternberg kref_get(&dev->kref); 310857dacad5SJay Sternberg if (IS_ERR(kthread_run(nvme_remove_dead_ctrl, dev, "nvme%d", 3109*1c63dc66SChristoph Hellwig dev->ctrl.instance))) { 311057dacad5SJay Sternberg dev_err(dev->dev, 311157dacad5SJay Sternberg "Failed to start controller remove task\n"); 311257dacad5SJay Sternberg kref_put(&dev->kref, nvme_free_dev); 311357dacad5SJay Sternberg } 311457dacad5SJay Sternberg } 311557dacad5SJay Sternberg 311657dacad5SJay Sternberg static void nvme_reset_work(struct work_struct *ws) 311757dacad5SJay Sternberg { 311857dacad5SJay Sternberg struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); 311957dacad5SJay Sternberg bool in_probe = work_busy(&dev->probe_work); 312057dacad5SJay Sternberg 312157dacad5SJay Sternberg nvme_dev_shutdown(dev); 312257dacad5SJay Sternberg 312357dacad5SJay Sternberg /* Synchronize with device probe so that work will see failure status 312457dacad5SJay Sternberg * and exit gracefully without trying to schedule another reset */ 312557dacad5SJay Sternberg flush_work(&dev->probe_work); 312657dacad5SJay Sternberg 312757dacad5SJay Sternberg /* Fail this device if reset occured during probe to avoid 312857dacad5SJay Sternberg * infinite initialization loops. */ 312957dacad5SJay Sternberg if (in_probe) { 313057dacad5SJay Sternberg nvme_dead_ctrl(dev); 313157dacad5SJay Sternberg return; 313257dacad5SJay Sternberg } 313357dacad5SJay Sternberg /* Schedule device resume asynchronously so the reset work is available 313457dacad5SJay Sternberg * to cleanup errors that may occur during reinitialization */ 313557dacad5SJay Sternberg schedule_work(&dev->probe_work); 313657dacad5SJay Sternberg } 313757dacad5SJay Sternberg 313857dacad5SJay Sternberg static int __nvme_reset(struct nvme_dev *dev) 313957dacad5SJay Sternberg { 314057dacad5SJay Sternberg if (work_pending(&dev->reset_work)) 314157dacad5SJay Sternberg return -EBUSY; 314257dacad5SJay Sternberg list_del_init(&dev->node); 314357dacad5SJay Sternberg queue_work(nvme_workq, &dev->reset_work); 314457dacad5SJay Sternberg return 0; 314557dacad5SJay Sternberg } 314657dacad5SJay Sternberg 314757dacad5SJay Sternberg static int nvme_reset(struct nvme_dev *dev) 314857dacad5SJay Sternberg { 314957dacad5SJay Sternberg int ret; 315057dacad5SJay Sternberg 3151*1c63dc66SChristoph Hellwig if (!dev->ctrl.admin_q || blk_queue_dying(dev->ctrl.admin_q)) 315257dacad5SJay Sternberg return -ENODEV; 315357dacad5SJay Sternberg 315457dacad5SJay Sternberg spin_lock(&dev_list_lock); 315557dacad5SJay Sternberg ret = __nvme_reset(dev); 315657dacad5SJay Sternberg spin_unlock(&dev_list_lock); 315757dacad5SJay Sternberg 315857dacad5SJay Sternberg if (!ret) { 315957dacad5SJay Sternberg flush_work(&dev->reset_work); 316057dacad5SJay Sternberg flush_work(&dev->probe_work); 316157dacad5SJay Sternberg return 0; 316257dacad5SJay Sternberg } 316357dacad5SJay Sternberg 316457dacad5SJay Sternberg return ret; 316557dacad5SJay Sternberg } 316657dacad5SJay Sternberg 316757dacad5SJay Sternberg static ssize_t nvme_sysfs_reset(struct device *dev, 316857dacad5SJay Sternberg struct device_attribute *attr, const char *buf, 316957dacad5SJay Sternberg size_t count) 317057dacad5SJay Sternberg { 317157dacad5SJay Sternberg struct nvme_dev *ndev = dev_get_drvdata(dev); 317257dacad5SJay Sternberg int ret; 317357dacad5SJay Sternberg 317457dacad5SJay Sternberg ret = nvme_reset(ndev); 317557dacad5SJay Sternberg if (ret < 0) 317657dacad5SJay Sternberg return ret; 317757dacad5SJay Sternberg 317857dacad5SJay Sternberg return count; 317957dacad5SJay Sternberg } 318057dacad5SJay Sternberg static DEVICE_ATTR(reset_controller, S_IWUSR, NULL, nvme_sysfs_reset); 318157dacad5SJay Sternberg 3182*1c63dc66SChristoph Hellwig static int nvme_pci_reg_read32(struct nvme_ctrl *ctrl, u32 off, u32 *val) 3183*1c63dc66SChristoph Hellwig { 3184*1c63dc66SChristoph Hellwig *val = readl(to_nvme_dev(ctrl)->bar + off); 3185*1c63dc66SChristoph Hellwig return 0; 3186*1c63dc66SChristoph Hellwig } 3187*1c63dc66SChristoph Hellwig 3188*1c63dc66SChristoph Hellwig static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = { 3189*1c63dc66SChristoph Hellwig .reg_read32 = nvme_pci_reg_read32, 3190*1c63dc66SChristoph Hellwig }; 3191*1c63dc66SChristoph Hellwig 319257dacad5SJay Sternberg static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) 319357dacad5SJay Sternberg { 319457dacad5SJay Sternberg int node, result = -ENOMEM; 319557dacad5SJay Sternberg struct nvme_dev *dev; 319657dacad5SJay Sternberg 319757dacad5SJay Sternberg node = dev_to_node(&pdev->dev); 319857dacad5SJay Sternberg if (node == NUMA_NO_NODE) 319957dacad5SJay Sternberg set_dev_node(&pdev->dev, 0); 320057dacad5SJay Sternberg 320157dacad5SJay Sternberg dev = kzalloc_node(sizeof(*dev), GFP_KERNEL, node); 320257dacad5SJay Sternberg if (!dev) 320357dacad5SJay Sternberg return -ENOMEM; 320457dacad5SJay Sternberg dev->entry = kzalloc_node(num_possible_cpus() * sizeof(*dev->entry), 320557dacad5SJay Sternberg GFP_KERNEL, node); 320657dacad5SJay Sternberg if (!dev->entry) 320757dacad5SJay Sternberg goto free; 320857dacad5SJay Sternberg dev->queues = kzalloc_node((num_possible_cpus() + 1) * sizeof(void *), 320957dacad5SJay Sternberg GFP_KERNEL, node); 321057dacad5SJay Sternberg if (!dev->queues) 321157dacad5SJay Sternberg goto free; 321257dacad5SJay Sternberg 321357dacad5SJay Sternberg INIT_LIST_HEAD(&dev->namespaces); 321457dacad5SJay Sternberg INIT_WORK(&dev->reset_work, nvme_reset_work); 321557dacad5SJay Sternberg dev->dev = get_device(&pdev->dev); 321657dacad5SJay Sternberg pci_set_drvdata(pdev, dev); 3217*1c63dc66SChristoph Hellwig 3218*1c63dc66SChristoph Hellwig dev->ctrl.ops = &nvme_pci_ctrl_ops; 3219*1c63dc66SChristoph Hellwig dev->ctrl.dev = dev->dev; 3220*1c63dc66SChristoph Hellwig 322157dacad5SJay Sternberg result = nvme_set_instance(dev); 322257dacad5SJay Sternberg if (result) 322357dacad5SJay Sternberg goto put_pci; 322457dacad5SJay Sternberg 322557dacad5SJay Sternberg result = nvme_setup_prp_pools(dev); 322657dacad5SJay Sternberg if (result) 322757dacad5SJay Sternberg goto release; 322857dacad5SJay Sternberg 322957dacad5SJay Sternberg kref_init(&dev->kref); 323057dacad5SJay Sternberg dev->device = device_create(nvme_class, &pdev->dev, 3231*1c63dc66SChristoph Hellwig MKDEV(nvme_char_major, dev->ctrl.instance), 3232*1c63dc66SChristoph Hellwig dev, "nvme%d", dev->ctrl.instance); 323357dacad5SJay Sternberg if (IS_ERR(dev->device)) { 323457dacad5SJay Sternberg result = PTR_ERR(dev->device); 323557dacad5SJay Sternberg goto release_pools; 323657dacad5SJay Sternberg } 323757dacad5SJay Sternberg get_device(dev->device); 323857dacad5SJay Sternberg dev_set_drvdata(dev->device, dev); 323957dacad5SJay Sternberg 324057dacad5SJay Sternberg result = device_create_file(dev->device, &dev_attr_reset_controller); 324157dacad5SJay Sternberg if (result) 324257dacad5SJay Sternberg goto put_dev; 324357dacad5SJay Sternberg 324457dacad5SJay Sternberg INIT_LIST_HEAD(&dev->node); 324557dacad5SJay Sternberg INIT_WORK(&dev->scan_work, nvme_dev_scan); 324657dacad5SJay Sternberg INIT_WORK(&dev->probe_work, nvme_probe_work); 324757dacad5SJay Sternberg schedule_work(&dev->probe_work); 324857dacad5SJay Sternberg return 0; 324957dacad5SJay Sternberg 325057dacad5SJay Sternberg put_dev: 3251*1c63dc66SChristoph Hellwig device_destroy(nvme_class, MKDEV(nvme_char_major, dev->ctrl.instance)); 325257dacad5SJay Sternberg put_device(dev->device); 325357dacad5SJay Sternberg release_pools: 325457dacad5SJay Sternberg nvme_release_prp_pools(dev); 325557dacad5SJay Sternberg release: 325657dacad5SJay Sternberg nvme_release_instance(dev); 325757dacad5SJay Sternberg put_pci: 325857dacad5SJay Sternberg put_device(dev->dev); 325957dacad5SJay Sternberg free: 326057dacad5SJay Sternberg kfree(dev->queues); 326157dacad5SJay Sternberg kfree(dev->entry); 326257dacad5SJay Sternberg kfree(dev); 326357dacad5SJay Sternberg return result; 326457dacad5SJay Sternberg } 326557dacad5SJay Sternberg 326657dacad5SJay Sternberg static void nvme_reset_notify(struct pci_dev *pdev, bool prepare) 326757dacad5SJay Sternberg { 326857dacad5SJay Sternberg struct nvme_dev *dev = pci_get_drvdata(pdev); 326957dacad5SJay Sternberg 327057dacad5SJay Sternberg if (prepare) 327157dacad5SJay Sternberg nvme_dev_shutdown(dev); 327257dacad5SJay Sternberg else 327357dacad5SJay Sternberg schedule_work(&dev->probe_work); 327457dacad5SJay Sternberg } 327557dacad5SJay Sternberg 327657dacad5SJay Sternberg static void nvme_shutdown(struct pci_dev *pdev) 327757dacad5SJay Sternberg { 327857dacad5SJay Sternberg struct nvme_dev *dev = pci_get_drvdata(pdev); 327957dacad5SJay Sternberg nvme_dev_shutdown(dev); 328057dacad5SJay Sternberg } 328157dacad5SJay Sternberg 328257dacad5SJay Sternberg static void nvme_remove(struct pci_dev *pdev) 328357dacad5SJay Sternberg { 328457dacad5SJay Sternberg struct nvme_dev *dev = pci_get_drvdata(pdev); 328557dacad5SJay Sternberg 328657dacad5SJay Sternberg spin_lock(&dev_list_lock); 328757dacad5SJay Sternberg list_del_init(&dev->node); 328857dacad5SJay Sternberg spin_unlock(&dev_list_lock); 328957dacad5SJay Sternberg 329057dacad5SJay Sternberg pci_set_drvdata(pdev, NULL); 329157dacad5SJay Sternberg flush_work(&dev->probe_work); 329257dacad5SJay Sternberg flush_work(&dev->reset_work); 329357dacad5SJay Sternberg flush_work(&dev->scan_work); 329457dacad5SJay Sternberg device_remove_file(dev->device, &dev_attr_reset_controller); 329557dacad5SJay Sternberg nvme_dev_remove(dev); 329657dacad5SJay Sternberg nvme_dev_shutdown(dev); 329757dacad5SJay Sternberg nvme_dev_remove_admin(dev); 3298*1c63dc66SChristoph Hellwig device_destroy(nvme_class, MKDEV(nvme_char_major, dev->ctrl.instance)); 329957dacad5SJay Sternberg nvme_free_queues(dev, 0); 330057dacad5SJay Sternberg nvme_release_cmb(dev); 330157dacad5SJay Sternberg nvme_release_prp_pools(dev); 330257dacad5SJay Sternberg kref_put(&dev->kref, nvme_free_dev); 330357dacad5SJay Sternberg } 330457dacad5SJay Sternberg 330557dacad5SJay Sternberg /* These functions are yet to be implemented */ 330657dacad5SJay Sternberg #define nvme_error_detected NULL 330757dacad5SJay Sternberg #define nvme_dump_registers NULL 330857dacad5SJay Sternberg #define nvme_link_reset NULL 330957dacad5SJay Sternberg #define nvme_slot_reset NULL 331057dacad5SJay Sternberg #define nvme_error_resume NULL 331157dacad5SJay Sternberg 331257dacad5SJay Sternberg #ifdef CONFIG_PM_SLEEP 331357dacad5SJay Sternberg static int nvme_suspend(struct device *dev) 331457dacad5SJay Sternberg { 331557dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev); 331657dacad5SJay Sternberg struct nvme_dev *ndev = pci_get_drvdata(pdev); 331757dacad5SJay Sternberg 331857dacad5SJay Sternberg nvme_dev_shutdown(ndev); 331957dacad5SJay Sternberg return 0; 332057dacad5SJay Sternberg } 332157dacad5SJay Sternberg 332257dacad5SJay Sternberg static int nvme_resume(struct device *dev) 332357dacad5SJay Sternberg { 332457dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev); 332557dacad5SJay Sternberg struct nvme_dev *ndev = pci_get_drvdata(pdev); 332657dacad5SJay Sternberg 332757dacad5SJay Sternberg schedule_work(&ndev->probe_work); 332857dacad5SJay Sternberg return 0; 332957dacad5SJay Sternberg } 333057dacad5SJay Sternberg #endif 333157dacad5SJay Sternberg 333257dacad5SJay Sternberg static SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume); 333357dacad5SJay Sternberg 333457dacad5SJay Sternberg static const struct pci_error_handlers nvme_err_handler = { 333557dacad5SJay Sternberg .error_detected = nvme_error_detected, 333657dacad5SJay Sternberg .mmio_enabled = nvme_dump_registers, 333757dacad5SJay Sternberg .link_reset = nvme_link_reset, 333857dacad5SJay Sternberg .slot_reset = nvme_slot_reset, 333957dacad5SJay Sternberg .resume = nvme_error_resume, 334057dacad5SJay Sternberg .reset_notify = nvme_reset_notify, 334157dacad5SJay Sternberg }; 334257dacad5SJay Sternberg 334357dacad5SJay Sternberg /* Move to pci_ids.h later */ 334457dacad5SJay Sternberg #define PCI_CLASS_STORAGE_EXPRESS 0x010802 334557dacad5SJay Sternberg 334657dacad5SJay Sternberg static const struct pci_device_id nvme_id_table[] = { 334757dacad5SJay Sternberg { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 3348c74dc780SStephan Günther { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2001) }, 334957dacad5SJay Sternberg { 0, } 335057dacad5SJay Sternberg }; 335157dacad5SJay Sternberg MODULE_DEVICE_TABLE(pci, nvme_id_table); 335257dacad5SJay Sternberg 335357dacad5SJay Sternberg static struct pci_driver nvme_driver = { 335457dacad5SJay Sternberg .name = "nvme", 335557dacad5SJay Sternberg .id_table = nvme_id_table, 335657dacad5SJay Sternberg .probe = nvme_probe, 335757dacad5SJay Sternberg .remove = nvme_remove, 335857dacad5SJay Sternberg .shutdown = nvme_shutdown, 335957dacad5SJay Sternberg .driver = { 336057dacad5SJay Sternberg .pm = &nvme_dev_pm_ops, 336157dacad5SJay Sternberg }, 336257dacad5SJay Sternberg .err_handler = &nvme_err_handler, 336357dacad5SJay Sternberg }; 336457dacad5SJay Sternberg 336557dacad5SJay Sternberg static int __init nvme_init(void) 336657dacad5SJay Sternberg { 336757dacad5SJay Sternberg int result; 336857dacad5SJay Sternberg 336957dacad5SJay Sternberg init_waitqueue_head(&nvme_kthread_wait); 337057dacad5SJay Sternberg 337157dacad5SJay Sternberg nvme_workq = create_singlethread_workqueue("nvme"); 337257dacad5SJay Sternberg if (!nvme_workq) 337357dacad5SJay Sternberg return -ENOMEM; 337457dacad5SJay Sternberg 337557dacad5SJay Sternberg result = register_blkdev(nvme_major, "nvme"); 337657dacad5SJay Sternberg if (result < 0) 337757dacad5SJay Sternberg goto kill_workq; 337857dacad5SJay Sternberg else if (result > 0) 337957dacad5SJay Sternberg nvme_major = result; 338057dacad5SJay Sternberg 338157dacad5SJay Sternberg result = __register_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme", 338257dacad5SJay Sternberg &nvme_dev_fops); 338357dacad5SJay Sternberg if (result < 0) 338457dacad5SJay Sternberg goto unregister_blkdev; 338557dacad5SJay Sternberg else if (result > 0) 338657dacad5SJay Sternberg nvme_char_major = result; 338757dacad5SJay Sternberg 338857dacad5SJay Sternberg nvme_class = class_create(THIS_MODULE, "nvme"); 338957dacad5SJay Sternberg if (IS_ERR(nvme_class)) { 339057dacad5SJay Sternberg result = PTR_ERR(nvme_class); 339157dacad5SJay Sternberg goto unregister_chrdev; 339257dacad5SJay Sternberg } 339357dacad5SJay Sternberg 339457dacad5SJay Sternberg result = pci_register_driver(&nvme_driver); 339557dacad5SJay Sternberg if (result) 339657dacad5SJay Sternberg goto destroy_class; 339757dacad5SJay Sternberg return 0; 339857dacad5SJay Sternberg 339957dacad5SJay Sternberg destroy_class: 340057dacad5SJay Sternberg class_destroy(nvme_class); 340157dacad5SJay Sternberg unregister_chrdev: 340257dacad5SJay Sternberg __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); 340357dacad5SJay Sternberg unregister_blkdev: 340457dacad5SJay Sternberg unregister_blkdev(nvme_major, "nvme"); 340557dacad5SJay Sternberg kill_workq: 340657dacad5SJay Sternberg destroy_workqueue(nvme_workq); 340757dacad5SJay Sternberg return result; 340857dacad5SJay Sternberg } 340957dacad5SJay Sternberg 341057dacad5SJay Sternberg static void __exit nvme_exit(void) 341157dacad5SJay Sternberg { 341257dacad5SJay Sternberg pci_unregister_driver(&nvme_driver); 341357dacad5SJay Sternberg unregister_blkdev(nvme_major, "nvme"); 341457dacad5SJay Sternberg destroy_workqueue(nvme_workq); 341557dacad5SJay Sternberg class_destroy(nvme_class); 341657dacad5SJay Sternberg __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); 341757dacad5SJay Sternberg BUG_ON(nvme_thread && !IS_ERR(nvme_thread)); 341857dacad5SJay Sternberg _nvme_check_size(); 341957dacad5SJay Sternberg } 342057dacad5SJay Sternberg 342157dacad5SJay Sternberg MODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 342257dacad5SJay Sternberg MODULE_LICENSE("GPL"); 342357dacad5SJay Sternberg MODULE_VERSION("1.0"); 342457dacad5SJay Sternberg module_init(nvme_init); 342557dacad5SJay Sternberg module_exit(nvme_exit); 3426