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 ADMIN_TIMEOUT (admin_timeout * HZ) 5657dacad5SJay Sternberg #define SHUTDOWN_TIMEOUT (shutdown_timeout * HZ) 5757dacad5SJay Sternberg 5857dacad5SJay Sternberg static unsigned char admin_timeout = 60; 5957dacad5SJay Sternberg module_param(admin_timeout, byte, 0644); 6057dacad5SJay Sternberg MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands"); 6157dacad5SJay Sternberg 6257dacad5SJay Sternberg unsigned char nvme_io_timeout = 30; 6357dacad5SJay Sternberg module_param_named(io_timeout, nvme_io_timeout, byte, 0644); 6457dacad5SJay Sternberg MODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O"); 6557dacad5SJay Sternberg 6657dacad5SJay Sternberg static unsigned char shutdown_timeout = 5; 6757dacad5SJay Sternberg module_param(shutdown_timeout, byte, 0644); 6857dacad5SJay Sternberg MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown"); 6957dacad5SJay Sternberg 7057dacad5SJay Sternberg static int nvme_major; 7157dacad5SJay Sternberg module_param(nvme_major, int, 0); 7257dacad5SJay Sternberg 7357dacad5SJay Sternberg static int nvme_char_major; 7457dacad5SJay Sternberg module_param(nvme_char_major, int, 0); 7557dacad5SJay Sternberg 7657dacad5SJay Sternberg static int use_threaded_interrupts; 7757dacad5SJay Sternberg module_param(use_threaded_interrupts, int, 0); 7857dacad5SJay Sternberg 7957dacad5SJay Sternberg static bool use_cmb_sqes = true; 8057dacad5SJay Sternberg module_param(use_cmb_sqes, bool, 0644); 8157dacad5SJay Sternberg MODULE_PARM_DESC(use_cmb_sqes, "use controller's memory buffer for I/O SQes"); 8257dacad5SJay Sternberg 8357dacad5SJay Sternberg static DEFINE_SPINLOCK(dev_list_lock); 8457dacad5SJay Sternberg static LIST_HEAD(dev_list); 8557dacad5SJay Sternberg static struct task_struct *nvme_thread; 8657dacad5SJay Sternberg static struct workqueue_struct *nvme_workq; 8757dacad5SJay Sternberg static wait_queue_head_t nvme_kthread_wait; 8857dacad5SJay Sternberg 8957dacad5SJay Sternberg static struct class *nvme_class; 9057dacad5SJay Sternberg 9157dacad5SJay Sternberg static int __nvme_reset(struct nvme_dev *dev); 9257dacad5SJay Sternberg static int nvme_reset(struct nvme_dev *dev); 93a0fa9647SJens Axboe static void nvme_process_cq(struct nvme_queue *nvmeq); 9457dacad5SJay Sternberg static void nvme_dead_ctrl(struct nvme_dev *dev); 9557dacad5SJay Sternberg 9657dacad5SJay Sternberg struct async_cmd_info { 9757dacad5SJay Sternberg struct kthread_work work; 9857dacad5SJay Sternberg struct kthread_worker *worker; 9957dacad5SJay Sternberg struct request *req; 10057dacad5SJay Sternberg u32 result; 10157dacad5SJay Sternberg int status; 10257dacad5SJay Sternberg void *ctx; 10357dacad5SJay Sternberg }; 10457dacad5SJay Sternberg 10557dacad5SJay Sternberg /* 10657dacad5SJay Sternberg * An NVM Express queue. Each device has at least two (one for admin 10757dacad5SJay Sternberg * commands and one for I/O commands). 10857dacad5SJay Sternberg */ 10957dacad5SJay Sternberg struct nvme_queue { 11057dacad5SJay Sternberg struct device *q_dmadev; 11157dacad5SJay Sternberg struct nvme_dev *dev; 11257dacad5SJay Sternberg char irqname[24]; /* nvme4294967295-65535\0 */ 11357dacad5SJay Sternberg spinlock_t q_lock; 11457dacad5SJay Sternberg struct nvme_command *sq_cmds; 11557dacad5SJay Sternberg struct nvme_command __iomem *sq_cmds_io; 11657dacad5SJay Sternberg volatile struct nvme_completion *cqes; 11757dacad5SJay Sternberg struct blk_mq_tags **tags; 11857dacad5SJay Sternberg dma_addr_t sq_dma_addr; 11957dacad5SJay Sternberg dma_addr_t cq_dma_addr; 12057dacad5SJay Sternberg u32 __iomem *q_db; 12157dacad5SJay Sternberg u16 q_depth; 12257dacad5SJay Sternberg s16 cq_vector; 12357dacad5SJay Sternberg u16 sq_head; 12457dacad5SJay Sternberg u16 sq_tail; 12557dacad5SJay Sternberg u16 cq_head; 12657dacad5SJay Sternberg u16 qid; 12757dacad5SJay Sternberg u8 cq_phase; 12857dacad5SJay Sternberg u8 cqe_seen; 12957dacad5SJay Sternberg struct async_cmd_info cmdinfo; 13057dacad5SJay Sternberg }; 13157dacad5SJay Sternberg 13257dacad5SJay Sternberg /* 13371bd150cSChristoph Hellwig * The nvme_iod describes the data in an I/O, including the list of PRP 13471bd150cSChristoph Hellwig * entries. You can't see it in this data structure because C doesn't let 13571bd150cSChristoph Hellwig * me express that. Use nvme_alloc_iod to ensure there's enough space 13671bd150cSChristoph Hellwig * allocated to store the PRP list. 13771bd150cSChristoph Hellwig */ 13871bd150cSChristoph Hellwig struct nvme_iod { 13971bd150cSChristoph Hellwig unsigned long private; /* For the use of the submitter of the I/O */ 14071bd150cSChristoph Hellwig int npages; /* In the PRP list. 0 means small pool in use */ 14171bd150cSChristoph Hellwig int offset; /* Of PRP list */ 14271bd150cSChristoph Hellwig int nents; /* Used in scatterlist */ 14371bd150cSChristoph Hellwig int length; /* Of data, in bytes */ 14471bd150cSChristoph Hellwig dma_addr_t first_dma; 14571bd150cSChristoph Hellwig struct scatterlist meta_sg[1]; /* metadata requires single contiguous buffer */ 14671bd150cSChristoph Hellwig struct scatterlist sg[0]; 14771bd150cSChristoph Hellwig }; 14871bd150cSChristoph Hellwig 14971bd150cSChristoph Hellwig /* 15057dacad5SJay Sternberg * Check we didin't inadvertently grow the command struct 15157dacad5SJay Sternberg */ 15257dacad5SJay Sternberg static inline void _nvme_check_size(void) 15357dacad5SJay Sternberg { 15457dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); 15557dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); 15657dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); 15757dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); 15857dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_features) != 64); 15957dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); 16057dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); 16157dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_command) != 64); 16257dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); 16357dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); 16457dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); 16557dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); 16657dacad5SJay Sternberg } 16757dacad5SJay Sternberg 16857dacad5SJay Sternberg typedef void (*nvme_completion_fn)(struct nvme_queue *, void *, 16957dacad5SJay Sternberg struct nvme_completion *); 17057dacad5SJay Sternberg 17157dacad5SJay Sternberg struct nvme_cmd_info { 17257dacad5SJay Sternberg nvme_completion_fn fn; 17357dacad5SJay Sternberg void *ctx; 17457dacad5SJay Sternberg int aborted; 17557dacad5SJay Sternberg struct nvme_queue *nvmeq; 17657dacad5SJay Sternberg struct nvme_iod iod[0]; 17757dacad5SJay Sternberg }; 17857dacad5SJay Sternberg 17957dacad5SJay Sternberg /* 18057dacad5SJay Sternberg * Max size of iod being embedded in the request payload 18157dacad5SJay Sternberg */ 18257dacad5SJay Sternberg #define NVME_INT_PAGES 2 18357dacad5SJay Sternberg #define NVME_INT_BYTES(dev) (NVME_INT_PAGES * (dev)->page_size) 18457dacad5SJay Sternberg #define NVME_INT_MASK 0x01 18557dacad5SJay Sternberg 18657dacad5SJay Sternberg /* 18757dacad5SJay Sternberg * Will slightly overestimate the number of pages needed. This is OK 18857dacad5SJay Sternberg * as it only leads to a small amount of wasted memory for the lifetime of 18957dacad5SJay Sternberg * the I/O. 19057dacad5SJay Sternberg */ 19157dacad5SJay Sternberg static int nvme_npages(unsigned size, struct nvme_dev *dev) 19257dacad5SJay Sternberg { 19357dacad5SJay Sternberg unsigned nprps = DIV_ROUND_UP(size + dev->page_size, dev->page_size); 19457dacad5SJay Sternberg return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); 19557dacad5SJay Sternberg } 19657dacad5SJay Sternberg 19757dacad5SJay Sternberg static unsigned int nvme_cmd_size(struct nvme_dev *dev) 19857dacad5SJay Sternberg { 19957dacad5SJay Sternberg unsigned int ret = sizeof(struct nvme_cmd_info); 20057dacad5SJay Sternberg 20157dacad5SJay Sternberg ret += sizeof(struct nvme_iod); 20257dacad5SJay Sternberg ret += sizeof(__le64 *) * nvme_npages(NVME_INT_BYTES(dev), dev); 20357dacad5SJay Sternberg ret += sizeof(struct scatterlist) * NVME_INT_PAGES; 20457dacad5SJay Sternberg 20557dacad5SJay Sternberg return ret; 20657dacad5SJay Sternberg } 20757dacad5SJay Sternberg 20857dacad5SJay Sternberg static int nvme_admin_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 20957dacad5SJay Sternberg unsigned int hctx_idx) 21057dacad5SJay Sternberg { 21157dacad5SJay Sternberg struct nvme_dev *dev = data; 21257dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[0]; 21357dacad5SJay Sternberg 21457dacad5SJay Sternberg WARN_ON(hctx_idx != 0); 21557dacad5SJay Sternberg WARN_ON(dev->admin_tagset.tags[0] != hctx->tags); 21657dacad5SJay Sternberg WARN_ON(nvmeq->tags); 21757dacad5SJay Sternberg 21857dacad5SJay Sternberg hctx->driver_data = nvmeq; 21957dacad5SJay Sternberg nvmeq->tags = &dev->admin_tagset.tags[0]; 22057dacad5SJay Sternberg return 0; 22157dacad5SJay Sternberg } 22257dacad5SJay Sternberg 22357dacad5SJay Sternberg static void nvme_admin_exit_hctx(struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx) 22457dacad5SJay Sternberg { 22557dacad5SJay Sternberg struct nvme_queue *nvmeq = hctx->driver_data; 22657dacad5SJay Sternberg 22757dacad5SJay Sternberg nvmeq->tags = NULL; 22857dacad5SJay Sternberg } 22957dacad5SJay Sternberg 23057dacad5SJay Sternberg static int nvme_admin_init_request(void *data, struct request *req, 23157dacad5SJay Sternberg unsigned int hctx_idx, unsigned int rq_idx, 23257dacad5SJay Sternberg unsigned int numa_node) 23357dacad5SJay Sternberg { 23457dacad5SJay Sternberg struct nvme_dev *dev = data; 23557dacad5SJay Sternberg struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); 23657dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[0]; 23757dacad5SJay Sternberg 23857dacad5SJay Sternberg BUG_ON(!nvmeq); 23957dacad5SJay Sternberg cmd->nvmeq = nvmeq; 24057dacad5SJay Sternberg return 0; 24157dacad5SJay Sternberg } 24257dacad5SJay Sternberg 24357dacad5SJay Sternberg static int nvme_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 24457dacad5SJay Sternberg unsigned int hctx_idx) 24557dacad5SJay Sternberg { 24657dacad5SJay Sternberg struct nvme_dev *dev = data; 24757dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; 24857dacad5SJay Sternberg 24957dacad5SJay Sternberg if (!nvmeq->tags) 25057dacad5SJay Sternberg nvmeq->tags = &dev->tagset.tags[hctx_idx]; 25157dacad5SJay Sternberg 25257dacad5SJay Sternberg WARN_ON(dev->tagset.tags[hctx_idx] != hctx->tags); 25357dacad5SJay Sternberg hctx->driver_data = nvmeq; 25457dacad5SJay Sternberg return 0; 25557dacad5SJay Sternberg } 25657dacad5SJay Sternberg 25757dacad5SJay Sternberg static int nvme_init_request(void *data, struct request *req, 25857dacad5SJay Sternberg unsigned int hctx_idx, unsigned int rq_idx, 25957dacad5SJay Sternberg unsigned int numa_node) 26057dacad5SJay Sternberg { 26157dacad5SJay Sternberg struct nvme_dev *dev = data; 26257dacad5SJay Sternberg struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); 26357dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; 26457dacad5SJay Sternberg 26557dacad5SJay Sternberg BUG_ON(!nvmeq); 26657dacad5SJay Sternberg cmd->nvmeq = nvmeq; 26757dacad5SJay Sternberg return 0; 26857dacad5SJay Sternberg } 26957dacad5SJay Sternberg 27057dacad5SJay Sternberg static void nvme_set_info(struct nvme_cmd_info *cmd, void *ctx, 27157dacad5SJay Sternberg nvme_completion_fn handler) 27257dacad5SJay Sternberg { 27357dacad5SJay Sternberg cmd->fn = handler; 27457dacad5SJay Sternberg cmd->ctx = ctx; 27557dacad5SJay Sternberg cmd->aborted = 0; 27657dacad5SJay Sternberg blk_mq_start_request(blk_mq_rq_from_pdu(cmd)); 27757dacad5SJay Sternberg } 27857dacad5SJay Sternberg 27957dacad5SJay Sternberg static void *iod_get_private(struct nvme_iod *iod) 28057dacad5SJay Sternberg { 28157dacad5SJay Sternberg return (void *) (iod->private & ~0x1UL); 28257dacad5SJay Sternberg } 28357dacad5SJay Sternberg 28457dacad5SJay Sternberg /* 28557dacad5SJay Sternberg * If bit 0 is set, the iod is embedded in the request payload. 28657dacad5SJay Sternberg */ 28757dacad5SJay Sternberg static bool iod_should_kfree(struct nvme_iod *iod) 28857dacad5SJay Sternberg { 28957dacad5SJay Sternberg return (iod->private & NVME_INT_MASK) == 0; 29057dacad5SJay Sternberg } 29157dacad5SJay Sternberg 29257dacad5SJay Sternberg /* Special values must be less than 0x1000 */ 29357dacad5SJay Sternberg #define CMD_CTX_BASE ((void *)POISON_POINTER_DELTA) 29457dacad5SJay Sternberg #define CMD_CTX_CANCELLED (0x30C + CMD_CTX_BASE) 29557dacad5SJay Sternberg #define CMD_CTX_COMPLETED (0x310 + CMD_CTX_BASE) 29657dacad5SJay Sternberg #define CMD_CTX_INVALID (0x314 + CMD_CTX_BASE) 29757dacad5SJay Sternberg 29857dacad5SJay Sternberg static void special_completion(struct nvme_queue *nvmeq, void *ctx, 29957dacad5SJay Sternberg struct nvme_completion *cqe) 30057dacad5SJay Sternberg { 30157dacad5SJay Sternberg if (ctx == CMD_CTX_CANCELLED) 30257dacad5SJay Sternberg return; 30357dacad5SJay Sternberg if (ctx == CMD_CTX_COMPLETED) { 30457dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, 30557dacad5SJay Sternberg "completed id %d twice on queue %d\n", 30657dacad5SJay Sternberg cqe->command_id, le16_to_cpup(&cqe->sq_id)); 30757dacad5SJay Sternberg return; 30857dacad5SJay Sternberg } 30957dacad5SJay Sternberg if (ctx == CMD_CTX_INVALID) { 31057dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, 31157dacad5SJay Sternberg "invalid id %d completed on queue %d\n", 31257dacad5SJay Sternberg cqe->command_id, le16_to_cpup(&cqe->sq_id)); 31357dacad5SJay Sternberg return; 31457dacad5SJay Sternberg } 31557dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, "Unknown special completion %p\n", ctx); 31657dacad5SJay Sternberg } 31757dacad5SJay Sternberg 31857dacad5SJay Sternberg static void *cancel_cmd_info(struct nvme_cmd_info *cmd, nvme_completion_fn *fn) 31957dacad5SJay Sternberg { 32057dacad5SJay Sternberg void *ctx; 32157dacad5SJay Sternberg 32257dacad5SJay Sternberg if (fn) 32357dacad5SJay Sternberg *fn = cmd->fn; 32457dacad5SJay Sternberg ctx = cmd->ctx; 32557dacad5SJay Sternberg cmd->fn = special_completion; 32657dacad5SJay Sternberg cmd->ctx = CMD_CTX_CANCELLED; 32757dacad5SJay Sternberg return ctx; 32857dacad5SJay Sternberg } 32957dacad5SJay Sternberg 33057dacad5SJay Sternberg static void async_req_completion(struct nvme_queue *nvmeq, void *ctx, 33157dacad5SJay Sternberg struct nvme_completion *cqe) 33257dacad5SJay Sternberg { 33357dacad5SJay Sternberg u32 result = le32_to_cpup(&cqe->result); 33457dacad5SJay Sternberg u16 status = le16_to_cpup(&cqe->status) >> 1; 33557dacad5SJay Sternberg 33657dacad5SJay Sternberg if (status == NVME_SC_SUCCESS || status == NVME_SC_ABORT_REQ) 33757dacad5SJay Sternberg ++nvmeq->dev->event_limit; 33857dacad5SJay Sternberg if (status != NVME_SC_SUCCESS) 33957dacad5SJay Sternberg return; 34057dacad5SJay Sternberg 34157dacad5SJay Sternberg switch (result & 0xff07) { 34257dacad5SJay Sternberg case NVME_AER_NOTICE_NS_CHANGED: 34357dacad5SJay Sternberg dev_info(nvmeq->q_dmadev, "rescanning\n"); 34457dacad5SJay Sternberg schedule_work(&nvmeq->dev->scan_work); 34557dacad5SJay Sternberg default: 34657dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, "async event result %08x\n", result); 34757dacad5SJay Sternberg } 34857dacad5SJay Sternberg } 34957dacad5SJay Sternberg 35057dacad5SJay Sternberg static void abort_completion(struct nvme_queue *nvmeq, void *ctx, 35157dacad5SJay Sternberg struct nvme_completion *cqe) 35257dacad5SJay Sternberg { 35357dacad5SJay Sternberg struct request *req = ctx; 35457dacad5SJay Sternberg 35557dacad5SJay Sternberg u16 status = le16_to_cpup(&cqe->status) >> 1; 35657dacad5SJay Sternberg u32 result = le32_to_cpup(&cqe->result); 35757dacad5SJay Sternberg 35857dacad5SJay Sternberg blk_mq_free_request(req); 35957dacad5SJay Sternberg 36057dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, "Abort status:%x result:%x", status, result); 36157dacad5SJay Sternberg ++nvmeq->dev->abort_limit; 36257dacad5SJay Sternberg } 36357dacad5SJay Sternberg 36457dacad5SJay Sternberg static void async_completion(struct nvme_queue *nvmeq, void *ctx, 36557dacad5SJay Sternberg struct nvme_completion *cqe) 36657dacad5SJay Sternberg { 36757dacad5SJay Sternberg struct async_cmd_info *cmdinfo = ctx; 36857dacad5SJay Sternberg cmdinfo->result = le32_to_cpup(&cqe->result); 36957dacad5SJay Sternberg cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 37057dacad5SJay Sternberg queue_kthread_work(cmdinfo->worker, &cmdinfo->work); 37157dacad5SJay Sternberg blk_mq_free_request(cmdinfo->req); 37257dacad5SJay Sternberg } 37357dacad5SJay Sternberg 37457dacad5SJay Sternberg static inline struct nvme_cmd_info *get_cmd_from_tag(struct nvme_queue *nvmeq, 37557dacad5SJay Sternberg unsigned int tag) 37657dacad5SJay Sternberg { 37757dacad5SJay Sternberg struct request *req = blk_mq_tag_to_rq(*nvmeq->tags, tag); 37857dacad5SJay Sternberg 37957dacad5SJay Sternberg return blk_mq_rq_to_pdu(req); 38057dacad5SJay Sternberg } 38157dacad5SJay Sternberg 38257dacad5SJay Sternberg /* 38357dacad5SJay Sternberg * Called with local interrupts disabled and the q_lock held. May not sleep. 38457dacad5SJay Sternberg */ 38557dacad5SJay Sternberg static void *nvme_finish_cmd(struct nvme_queue *nvmeq, int tag, 38657dacad5SJay Sternberg nvme_completion_fn *fn) 38757dacad5SJay Sternberg { 38857dacad5SJay Sternberg struct nvme_cmd_info *cmd = get_cmd_from_tag(nvmeq, tag); 38957dacad5SJay Sternberg void *ctx; 39057dacad5SJay Sternberg if (tag >= nvmeq->q_depth) { 39157dacad5SJay Sternberg *fn = special_completion; 39257dacad5SJay Sternberg return CMD_CTX_INVALID; 39357dacad5SJay Sternberg } 39457dacad5SJay Sternberg if (fn) 39557dacad5SJay Sternberg *fn = cmd->fn; 39657dacad5SJay Sternberg ctx = cmd->ctx; 39757dacad5SJay Sternberg cmd->fn = special_completion; 39857dacad5SJay Sternberg cmd->ctx = CMD_CTX_COMPLETED; 39957dacad5SJay Sternberg return ctx; 40057dacad5SJay Sternberg } 40157dacad5SJay Sternberg 40257dacad5SJay Sternberg /** 40357dacad5SJay Sternberg * nvme_submit_cmd() - Copy a command into a queue and ring the doorbell 40457dacad5SJay Sternberg * @nvmeq: The queue to use 40557dacad5SJay Sternberg * @cmd: The command to send 40657dacad5SJay Sternberg * 40757dacad5SJay Sternberg * Safe to use from interrupt context 40857dacad5SJay Sternberg */ 40957dacad5SJay Sternberg static void __nvme_submit_cmd(struct nvme_queue *nvmeq, 41057dacad5SJay Sternberg struct nvme_command *cmd) 41157dacad5SJay Sternberg { 41257dacad5SJay Sternberg u16 tail = nvmeq->sq_tail; 41357dacad5SJay Sternberg 41457dacad5SJay Sternberg if (nvmeq->sq_cmds_io) 41557dacad5SJay Sternberg memcpy_toio(&nvmeq->sq_cmds_io[tail], cmd, sizeof(*cmd)); 41657dacad5SJay Sternberg else 41757dacad5SJay Sternberg memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); 41857dacad5SJay Sternberg 41957dacad5SJay Sternberg if (++tail == nvmeq->q_depth) 42057dacad5SJay Sternberg tail = 0; 42157dacad5SJay Sternberg writel(tail, nvmeq->q_db); 42257dacad5SJay Sternberg nvmeq->sq_tail = tail; 42357dacad5SJay Sternberg } 42457dacad5SJay Sternberg 42557dacad5SJay Sternberg static void nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) 42657dacad5SJay Sternberg { 42757dacad5SJay Sternberg unsigned long flags; 42857dacad5SJay Sternberg spin_lock_irqsave(&nvmeq->q_lock, flags); 42957dacad5SJay Sternberg __nvme_submit_cmd(nvmeq, cmd); 43057dacad5SJay Sternberg spin_unlock_irqrestore(&nvmeq->q_lock, flags); 43157dacad5SJay Sternberg } 43257dacad5SJay Sternberg 43357dacad5SJay Sternberg static __le64 **iod_list(struct nvme_iod *iod) 43457dacad5SJay Sternberg { 43557dacad5SJay Sternberg return ((void *)iod) + iod->offset; 43657dacad5SJay Sternberg } 43757dacad5SJay Sternberg 43857dacad5SJay Sternberg static inline void iod_init(struct nvme_iod *iod, unsigned nbytes, 43957dacad5SJay Sternberg unsigned nseg, unsigned long private) 44057dacad5SJay Sternberg { 44157dacad5SJay Sternberg iod->private = private; 44257dacad5SJay Sternberg iod->offset = offsetof(struct nvme_iod, sg[nseg]); 44357dacad5SJay Sternberg iod->npages = -1; 44457dacad5SJay Sternberg iod->length = nbytes; 44557dacad5SJay Sternberg iod->nents = 0; 44657dacad5SJay Sternberg } 44757dacad5SJay Sternberg 44857dacad5SJay Sternberg static struct nvme_iod * 44957dacad5SJay Sternberg __nvme_alloc_iod(unsigned nseg, unsigned bytes, struct nvme_dev *dev, 45057dacad5SJay Sternberg unsigned long priv, gfp_t gfp) 45157dacad5SJay Sternberg { 45257dacad5SJay Sternberg struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + 45357dacad5SJay Sternberg sizeof(__le64 *) * nvme_npages(bytes, dev) + 45457dacad5SJay Sternberg sizeof(struct scatterlist) * nseg, gfp); 45557dacad5SJay Sternberg 45657dacad5SJay Sternberg if (iod) 45757dacad5SJay Sternberg iod_init(iod, bytes, nseg, priv); 45857dacad5SJay Sternberg 45957dacad5SJay Sternberg return iod; 46057dacad5SJay Sternberg } 46157dacad5SJay Sternberg 46257dacad5SJay Sternberg static struct nvme_iod *nvme_alloc_iod(struct request *rq, struct nvme_dev *dev, 46357dacad5SJay Sternberg gfp_t gfp) 46457dacad5SJay Sternberg { 46557dacad5SJay Sternberg unsigned size = !(rq->cmd_flags & REQ_DISCARD) ? blk_rq_bytes(rq) : 46657dacad5SJay Sternberg sizeof(struct nvme_dsm_range); 46757dacad5SJay Sternberg struct nvme_iod *iod; 46857dacad5SJay Sternberg 46957dacad5SJay Sternberg if (rq->nr_phys_segments <= NVME_INT_PAGES && 47057dacad5SJay Sternberg size <= NVME_INT_BYTES(dev)) { 47157dacad5SJay Sternberg struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(rq); 47257dacad5SJay Sternberg 47357dacad5SJay Sternberg iod = cmd->iod; 47457dacad5SJay Sternberg iod_init(iod, size, rq->nr_phys_segments, 47557dacad5SJay Sternberg (unsigned long) rq | NVME_INT_MASK); 47657dacad5SJay Sternberg return iod; 47757dacad5SJay Sternberg } 47857dacad5SJay Sternberg 47957dacad5SJay Sternberg return __nvme_alloc_iod(rq->nr_phys_segments, size, dev, 48057dacad5SJay Sternberg (unsigned long) rq, gfp); 48157dacad5SJay Sternberg } 48257dacad5SJay Sternberg 48357dacad5SJay Sternberg static void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) 48457dacad5SJay Sternberg { 48557dacad5SJay Sternberg const int last_prp = dev->page_size / 8 - 1; 48657dacad5SJay Sternberg int i; 48757dacad5SJay Sternberg __le64 **list = iod_list(iod); 48857dacad5SJay Sternberg dma_addr_t prp_dma = iod->first_dma; 48957dacad5SJay Sternberg 49057dacad5SJay Sternberg if (iod->npages == 0) 49157dacad5SJay Sternberg dma_pool_free(dev->prp_small_pool, list[0], prp_dma); 49257dacad5SJay Sternberg for (i = 0; i < iod->npages; i++) { 49357dacad5SJay Sternberg __le64 *prp_list = list[i]; 49457dacad5SJay Sternberg dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); 49557dacad5SJay Sternberg dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); 49657dacad5SJay Sternberg prp_dma = next_prp_dma; 49757dacad5SJay Sternberg } 49857dacad5SJay Sternberg 49957dacad5SJay Sternberg if (iod_should_kfree(iod)) 50057dacad5SJay Sternberg kfree(iod); 50157dacad5SJay Sternberg } 50257dacad5SJay Sternberg 50357dacad5SJay Sternberg static int nvme_error_status(u16 status) 50457dacad5SJay Sternberg { 50557dacad5SJay Sternberg switch (status & 0x7ff) { 50657dacad5SJay Sternberg case NVME_SC_SUCCESS: 50757dacad5SJay Sternberg return 0; 50857dacad5SJay Sternberg case NVME_SC_CAP_EXCEEDED: 50957dacad5SJay Sternberg return -ENOSPC; 51057dacad5SJay Sternberg default: 51157dacad5SJay Sternberg return -EIO; 51257dacad5SJay Sternberg } 51357dacad5SJay Sternberg } 51457dacad5SJay Sternberg 51557dacad5SJay Sternberg #ifdef CONFIG_BLK_DEV_INTEGRITY 51657dacad5SJay Sternberg static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) 51757dacad5SJay Sternberg { 51857dacad5SJay Sternberg if (be32_to_cpu(pi->ref_tag) == v) 51957dacad5SJay Sternberg pi->ref_tag = cpu_to_be32(p); 52057dacad5SJay Sternberg } 52157dacad5SJay Sternberg 52257dacad5SJay Sternberg static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) 52357dacad5SJay Sternberg { 52457dacad5SJay Sternberg if (be32_to_cpu(pi->ref_tag) == p) 52557dacad5SJay Sternberg pi->ref_tag = cpu_to_be32(v); 52657dacad5SJay Sternberg } 52757dacad5SJay Sternberg 52857dacad5SJay Sternberg /** 52957dacad5SJay Sternberg * nvme_dif_remap - remaps ref tags to bip seed and physical lba 53057dacad5SJay Sternberg * 53157dacad5SJay Sternberg * The virtual start sector is the one that was originally submitted by the 53257dacad5SJay Sternberg * block layer. Due to partitioning, MD/DM cloning, etc. the actual physical 53357dacad5SJay Sternberg * start sector may be different. Remap protection information to match the 53457dacad5SJay Sternberg * physical LBA on writes, and back to the original seed on reads. 53557dacad5SJay Sternberg * 53657dacad5SJay Sternberg * Type 0 and 3 do not have a ref tag, so no remapping required. 53757dacad5SJay Sternberg */ 53857dacad5SJay Sternberg static void nvme_dif_remap(struct request *req, 53957dacad5SJay Sternberg void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) 54057dacad5SJay Sternberg { 54157dacad5SJay Sternberg struct nvme_ns *ns = req->rq_disk->private_data; 54257dacad5SJay Sternberg struct bio_integrity_payload *bip; 54357dacad5SJay Sternberg struct t10_pi_tuple *pi; 54457dacad5SJay Sternberg void *p, *pmap; 54557dacad5SJay Sternberg u32 i, nlb, ts, phys, virt; 54657dacad5SJay Sternberg 54757dacad5SJay Sternberg if (!ns->pi_type || ns->pi_type == NVME_NS_DPS_PI_TYPE3) 54857dacad5SJay Sternberg return; 54957dacad5SJay Sternberg 55057dacad5SJay Sternberg bip = bio_integrity(req->bio); 55157dacad5SJay Sternberg if (!bip) 55257dacad5SJay Sternberg return; 55357dacad5SJay Sternberg 55457dacad5SJay Sternberg pmap = kmap_atomic(bip->bip_vec->bv_page) + bip->bip_vec->bv_offset; 55557dacad5SJay Sternberg 55657dacad5SJay Sternberg p = pmap; 55757dacad5SJay Sternberg virt = bip_get_seed(bip); 55857dacad5SJay Sternberg phys = nvme_block_nr(ns, blk_rq_pos(req)); 55957dacad5SJay Sternberg nlb = (blk_rq_bytes(req) >> ns->lba_shift); 560ac6fc48cSDan Williams ts = ns->disk->queue->integrity.tuple_size; 56157dacad5SJay Sternberg 56257dacad5SJay Sternberg for (i = 0; i < nlb; i++, virt++, phys++) { 56357dacad5SJay Sternberg pi = (struct t10_pi_tuple *)p; 56457dacad5SJay Sternberg dif_swap(phys, virt, pi); 56557dacad5SJay Sternberg p += ts; 56657dacad5SJay Sternberg } 56757dacad5SJay Sternberg kunmap_atomic(pmap); 56857dacad5SJay Sternberg } 56957dacad5SJay Sternberg 57057dacad5SJay Sternberg static void nvme_init_integrity(struct nvme_ns *ns) 57157dacad5SJay Sternberg { 57257dacad5SJay Sternberg struct blk_integrity integrity; 57357dacad5SJay Sternberg 57457dacad5SJay Sternberg switch (ns->pi_type) { 57557dacad5SJay Sternberg case NVME_NS_DPS_PI_TYPE3: 5760f8087ecSMartin K. Petersen integrity.profile = &t10_pi_type3_crc; 57757dacad5SJay Sternberg break; 57857dacad5SJay Sternberg case NVME_NS_DPS_PI_TYPE1: 57957dacad5SJay Sternberg case NVME_NS_DPS_PI_TYPE2: 5800f8087ecSMartin K. Petersen integrity.profile = &t10_pi_type1_crc; 58157dacad5SJay Sternberg break; 58257dacad5SJay Sternberg default: 5834125a09bSDan Williams integrity.profile = NULL; 58457dacad5SJay Sternberg break; 58557dacad5SJay Sternberg } 58657dacad5SJay Sternberg integrity.tuple_size = ns->ms; 58757dacad5SJay Sternberg blk_integrity_register(ns->disk, &integrity); 58857dacad5SJay Sternberg blk_queue_max_integrity_segments(ns->queue, 1); 58957dacad5SJay Sternberg } 59057dacad5SJay Sternberg #else /* CONFIG_BLK_DEV_INTEGRITY */ 59157dacad5SJay Sternberg static void nvme_dif_remap(struct request *req, 59257dacad5SJay Sternberg void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) 59357dacad5SJay Sternberg { 59457dacad5SJay Sternberg } 59557dacad5SJay Sternberg static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) 59657dacad5SJay Sternberg { 59757dacad5SJay Sternberg } 59857dacad5SJay Sternberg static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) 59957dacad5SJay Sternberg { 60057dacad5SJay Sternberg } 60157dacad5SJay Sternberg static void nvme_init_integrity(struct nvme_ns *ns) 60257dacad5SJay Sternberg { 60357dacad5SJay Sternberg } 60457dacad5SJay Sternberg #endif 60557dacad5SJay Sternberg 60657dacad5SJay Sternberg static void req_completion(struct nvme_queue *nvmeq, void *ctx, 60757dacad5SJay Sternberg struct nvme_completion *cqe) 60857dacad5SJay Sternberg { 60957dacad5SJay Sternberg struct nvme_iod *iod = ctx; 61057dacad5SJay Sternberg struct request *req = iod_get_private(iod); 61157dacad5SJay Sternberg struct nvme_cmd_info *cmd_rq = blk_mq_rq_to_pdu(req); 61257dacad5SJay Sternberg u16 status = le16_to_cpup(&cqe->status) >> 1; 613a9aa31cdSLinus Torvalds bool requeue = false; 614ef658fc2SJens Axboe int error = 0; 61557dacad5SJay Sternberg 61657dacad5SJay Sternberg if (unlikely(status)) { 61757dacad5SJay Sternberg if (!(status & NVME_SC_DNR || blk_noretry_request(req)) 61857dacad5SJay Sternberg && (jiffies - req->start_time) < req->timeout) { 61957dacad5SJay Sternberg unsigned long flags; 62057dacad5SJay Sternberg 621a9aa31cdSLinus Torvalds requeue = true; 62257dacad5SJay Sternberg blk_mq_requeue_request(req); 62357dacad5SJay Sternberg spin_lock_irqsave(req->q->queue_lock, flags); 62457dacad5SJay Sternberg if (!blk_queue_stopped(req->q)) 62557dacad5SJay Sternberg blk_mq_kick_requeue_list(req->q); 62657dacad5SJay Sternberg spin_unlock_irqrestore(req->q->queue_lock, flags); 627a9aa31cdSLinus Torvalds goto release_iod; 62857dacad5SJay Sternberg } 62957dacad5SJay Sternberg 63057dacad5SJay Sternberg if (req->cmd_type == REQ_TYPE_DRV_PRIV) { 63157dacad5SJay Sternberg if (cmd_rq->ctx == CMD_CTX_CANCELLED) 6321951feaeSChristoph Hellwig error = -EINTR; 6331951feaeSChristoph Hellwig else 6341951feaeSChristoph Hellwig error = status; 63557dacad5SJay Sternberg } else { 6361951feaeSChristoph Hellwig error = nvme_error_status(status); 63757dacad5SJay Sternberg } 63857dacad5SJay Sternberg } 63957dacad5SJay Sternberg 64057dacad5SJay Sternberg if (req->cmd_type == REQ_TYPE_DRV_PRIV) { 64157dacad5SJay Sternberg u32 result = le32_to_cpup(&cqe->result); 64257dacad5SJay Sternberg req->special = (void *)(uintptr_t)result; 64357dacad5SJay Sternberg } 64457dacad5SJay Sternberg 64557dacad5SJay Sternberg if (cmd_rq->aborted) 64657dacad5SJay Sternberg dev_warn(nvmeq->dev->dev, 64757dacad5SJay Sternberg "completing aborted command with status:%04x\n", 6481951feaeSChristoph Hellwig error); 64957dacad5SJay Sternberg 650a9aa31cdSLinus Torvalds release_iod: 65157dacad5SJay Sternberg if (iod->nents) { 65257dacad5SJay Sternberg dma_unmap_sg(nvmeq->dev->dev, iod->sg, iod->nents, 65357dacad5SJay Sternberg rq_data_dir(req) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 65457dacad5SJay Sternberg if (blk_integrity_rq(req)) { 65557dacad5SJay Sternberg if (!rq_data_dir(req)) 65657dacad5SJay Sternberg nvme_dif_remap(req, nvme_dif_complete); 65757dacad5SJay Sternberg dma_unmap_sg(nvmeq->dev->dev, iod->meta_sg, 1, 65857dacad5SJay Sternberg rq_data_dir(req) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 65957dacad5SJay Sternberg } 66057dacad5SJay Sternberg } 66157dacad5SJay Sternberg nvme_free_iod(nvmeq->dev, iod); 66257dacad5SJay Sternberg 663a9aa31cdSLinus Torvalds if (likely(!requeue)) 6641951feaeSChristoph Hellwig blk_mq_complete_request(req, error); 66557dacad5SJay Sternberg } 66657dacad5SJay Sternberg 66757dacad5SJay Sternberg /* length is in bytes. gfp flags indicates whether we may sleep. */ 66857dacad5SJay Sternberg static int nvme_setup_prps(struct nvme_dev *dev, struct nvme_iod *iod, 66957dacad5SJay Sternberg int total_len, gfp_t gfp) 67057dacad5SJay Sternberg { 67157dacad5SJay Sternberg struct dma_pool *pool; 67257dacad5SJay Sternberg int length = total_len; 67357dacad5SJay Sternberg struct scatterlist *sg = iod->sg; 67457dacad5SJay Sternberg int dma_len = sg_dma_len(sg); 67557dacad5SJay Sternberg u64 dma_addr = sg_dma_address(sg); 67657dacad5SJay Sternberg u32 page_size = dev->page_size; 67757dacad5SJay Sternberg int offset = dma_addr & (page_size - 1); 67857dacad5SJay Sternberg __le64 *prp_list; 67957dacad5SJay Sternberg __le64 **list = iod_list(iod); 68057dacad5SJay Sternberg dma_addr_t prp_dma; 68157dacad5SJay Sternberg int nprps, i; 68257dacad5SJay Sternberg 68357dacad5SJay Sternberg length -= (page_size - offset); 68457dacad5SJay Sternberg if (length <= 0) 68557dacad5SJay Sternberg return total_len; 68657dacad5SJay Sternberg 68757dacad5SJay Sternberg dma_len -= (page_size - offset); 68857dacad5SJay Sternberg if (dma_len) { 68957dacad5SJay Sternberg dma_addr += (page_size - offset); 69057dacad5SJay Sternberg } else { 69157dacad5SJay Sternberg sg = sg_next(sg); 69257dacad5SJay Sternberg dma_addr = sg_dma_address(sg); 69357dacad5SJay Sternberg dma_len = sg_dma_len(sg); 69457dacad5SJay Sternberg } 69557dacad5SJay Sternberg 69657dacad5SJay Sternberg if (length <= page_size) { 69757dacad5SJay Sternberg iod->first_dma = dma_addr; 69857dacad5SJay Sternberg return total_len; 69957dacad5SJay Sternberg } 70057dacad5SJay Sternberg 70157dacad5SJay Sternberg nprps = DIV_ROUND_UP(length, page_size); 70257dacad5SJay Sternberg if (nprps <= (256 / 8)) { 70357dacad5SJay Sternberg pool = dev->prp_small_pool; 70457dacad5SJay Sternberg iod->npages = 0; 70557dacad5SJay Sternberg } else { 70657dacad5SJay Sternberg pool = dev->prp_page_pool; 70757dacad5SJay Sternberg iod->npages = 1; 70857dacad5SJay Sternberg } 70957dacad5SJay Sternberg 71057dacad5SJay Sternberg prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 71157dacad5SJay Sternberg if (!prp_list) { 71257dacad5SJay Sternberg iod->first_dma = dma_addr; 71357dacad5SJay Sternberg iod->npages = -1; 71457dacad5SJay Sternberg return (total_len - length) + page_size; 71557dacad5SJay Sternberg } 71657dacad5SJay Sternberg list[0] = prp_list; 71757dacad5SJay Sternberg iod->first_dma = prp_dma; 71857dacad5SJay Sternberg i = 0; 71957dacad5SJay Sternberg for (;;) { 72057dacad5SJay Sternberg if (i == page_size >> 3) { 72157dacad5SJay Sternberg __le64 *old_prp_list = prp_list; 72257dacad5SJay Sternberg prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 72357dacad5SJay Sternberg if (!prp_list) 72457dacad5SJay Sternberg return total_len - length; 72557dacad5SJay Sternberg list[iod->npages++] = prp_list; 72657dacad5SJay Sternberg prp_list[0] = old_prp_list[i - 1]; 72757dacad5SJay Sternberg old_prp_list[i - 1] = cpu_to_le64(prp_dma); 72857dacad5SJay Sternberg i = 1; 72957dacad5SJay Sternberg } 73057dacad5SJay Sternberg prp_list[i++] = cpu_to_le64(dma_addr); 73157dacad5SJay Sternberg dma_len -= page_size; 73257dacad5SJay Sternberg dma_addr += page_size; 73357dacad5SJay Sternberg length -= page_size; 73457dacad5SJay Sternberg if (length <= 0) 73557dacad5SJay Sternberg break; 73657dacad5SJay Sternberg if (dma_len > 0) 73757dacad5SJay Sternberg continue; 73857dacad5SJay Sternberg BUG_ON(dma_len < 0); 73957dacad5SJay Sternberg sg = sg_next(sg); 74057dacad5SJay Sternberg dma_addr = sg_dma_address(sg); 74157dacad5SJay Sternberg dma_len = sg_dma_len(sg); 74257dacad5SJay Sternberg } 74357dacad5SJay Sternberg 74457dacad5SJay Sternberg return total_len; 74557dacad5SJay Sternberg } 74657dacad5SJay Sternberg 74757dacad5SJay Sternberg static void nvme_submit_priv(struct nvme_queue *nvmeq, struct request *req, 74857dacad5SJay Sternberg struct nvme_iod *iod) 74957dacad5SJay Sternberg { 75057dacad5SJay Sternberg struct nvme_command cmnd; 75157dacad5SJay Sternberg 75257dacad5SJay Sternberg memcpy(&cmnd, req->cmd, sizeof(cmnd)); 75357dacad5SJay Sternberg cmnd.rw.command_id = req->tag; 75457dacad5SJay Sternberg if (req->nr_phys_segments) { 75557dacad5SJay Sternberg cmnd.rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); 75657dacad5SJay Sternberg cmnd.rw.prp2 = cpu_to_le64(iod->first_dma); 75757dacad5SJay Sternberg } 75857dacad5SJay Sternberg 75957dacad5SJay Sternberg __nvme_submit_cmd(nvmeq, &cmnd); 76057dacad5SJay Sternberg } 76157dacad5SJay Sternberg 76257dacad5SJay Sternberg /* 76357dacad5SJay Sternberg * We reuse the small pool to allocate the 16-byte range here as it is not 76457dacad5SJay Sternberg * worth having a special pool for these or additional cases to handle freeing 76557dacad5SJay Sternberg * the iod. 76657dacad5SJay Sternberg */ 76757dacad5SJay Sternberg static void nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, 76857dacad5SJay Sternberg struct request *req, struct nvme_iod *iod) 76957dacad5SJay Sternberg { 77057dacad5SJay Sternberg struct nvme_dsm_range *range = 77157dacad5SJay Sternberg (struct nvme_dsm_range *)iod_list(iod)[0]; 77257dacad5SJay Sternberg struct nvme_command cmnd; 77357dacad5SJay Sternberg 77457dacad5SJay Sternberg range->cattr = cpu_to_le32(0); 77557dacad5SJay Sternberg range->nlb = cpu_to_le32(blk_rq_bytes(req) >> ns->lba_shift); 77657dacad5SJay Sternberg range->slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); 77757dacad5SJay Sternberg 77857dacad5SJay Sternberg memset(&cmnd, 0, sizeof(cmnd)); 77957dacad5SJay Sternberg cmnd.dsm.opcode = nvme_cmd_dsm; 78057dacad5SJay Sternberg cmnd.dsm.command_id = req->tag; 78157dacad5SJay Sternberg cmnd.dsm.nsid = cpu_to_le32(ns->ns_id); 78257dacad5SJay Sternberg cmnd.dsm.prp1 = cpu_to_le64(iod->first_dma); 78357dacad5SJay Sternberg cmnd.dsm.nr = 0; 78457dacad5SJay Sternberg cmnd.dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); 78557dacad5SJay Sternberg 78657dacad5SJay Sternberg __nvme_submit_cmd(nvmeq, &cmnd); 78757dacad5SJay Sternberg } 78857dacad5SJay Sternberg 78957dacad5SJay Sternberg static void nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, 79057dacad5SJay Sternberg int cmdid) 79157dacad5SJay Sternberg { 79257dacad5SJay Sternberg struct nvme_command cmnd; 79357dacad5SJay Sternberg 79457dacad5SJay Sternberg memset(&cmnd, 0, sizeof(cmnd)); 79557dacad5SJay Sternberg cmnd.common.opcode = nvme_cmd_flush; 79657dacad5SJay Sternberg cmnd.common.command_id = cmdid; 79757dacad5SJay Sternberg cmnd.common.nsid = cpu_to_le32(ns->ns_id); 79857dacad5SJay Sternberg 79957dacad5SJay Sternberg __nvme_submit_cmd(nvmeq, &cmnd); 80057dacad5SJay Sternberg } 80157dacad5SJay Sternberg 80257dacad5SJay Sternberg static int nvme_submit_iod(struct nvme_queue *nvmeq, struct nvme_iod *iod, 80357dacad5SJay Sternberg struct nvme_ns *ns) 80457dacad5SJay Sternberg { 80557dacad5SJay Sternberg struct request *req = iod_get_private(iod); 80657dacad5SJay Sternberg struct nvme_command cmnd; 80757dacad5SJay Sternberg u16 control = 0; 80857dacad5SJay Sternberg u32 dsmgmt = 0; 80957dacad5SJay Sternberg 81057dacad5SJay Sternberg if (req->cmd_flags & REQ_FUA) 81157dacad5SJay Sternberg control |= NVME_RW_FUA; 81257dacad5SJay Sternberg if (req->cmd_flags & (REQ_FAILFAST_DEV | REQ_RAHEAD)) 81357dacad5SJay Sternberg control |= NVME_RW_LR; 81457dacad5SJay Sternberg 81557dacad5SJay Sternberg if (req->cmd_flags & REQ_RAHEAD) 81657dacad5SJay Sternberg dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; 81757dacad5SJay Sternberg 81857dacad5SJay Sternberg memset(&cmnd, 0, sizeof(cmnd)); 81957dacad5SJay Sternberg cmnd.rw.opcode = (rq_data_dir(req) ? nvme_cmd_write : nvme_cmd_read); 82057dacad5SJay Sternberg cmnd.rw.command_id = req->tag; 82157dacad5SJay Sternberg cmnd.rw.nsid = cpu_to_le32(ns->ns_id); 82257dacad5SJay Sternberg cmnd.rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); 82357dacad5SJay Sternberg cmnd.rw.prp2 = cpu_to_le64(iod->first_dma); 82457dacad5SJay Sternberg cmnd.rw.slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); 82557dacad5SJay Sternberg cmnd.rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); 82657dacad5SJay Sternberg 82757dacad5SJay Sternberg if (ns->ms) { 82857dacad5SJay Sternberg switch (ns->pi_type) { 82957dacad5SJay Sternberg case NVME_NS_DPS_PI_TYPE3: 83057dacad5SJay Sternberg control |= NVME_RW_PRINFO_PRCHK_GUARD; 83157dacad5SJay Sternberg break; 83257dacad5SJay Sternberg case NVME_NS_DPS_PI_TYPE1: 83357dacad5SJay Sternberg case NVME_NS_DPS_PI_TYPE2: 83457dacad5SJay Sternberg control |= NVME_RW_PRINFO_PRCHK_GUARD | 83557dacad5SJay Sternberg NVME_RW_PRINFO_PRCHK_REF; 83657dacad5SJay Sternberg cmnd.rw.reftag = cpu_to_le32( 83757dacad5SJay Sternberg nvme_block_nr(ns, blk_rq_pos(req))); 83857dacad5SJay Sternberg break; 83957dacad5SJay Sternberg } 84057dacad5SJay Sternberg if (blk_integrity_rq(req)) 84157dacad5SJay Sternberg cmnd.rw.metadata = 84257dacad5SJay Sternberg cpu_to_le64(sg_dma_address(iod->meta_sg)); 84357dacad5SJay Sternberg else 84457dacad5SJay Sternberg control |= NVME_RW_PRINFO_PRACT; 84557dacad5SJay Sternberg } 84657dacad5SJay Sternberg 84757dacad5SJay Sternberg cmnd.rw.control = cpu_to_le16(control); 84857dacad5SJay Sternberg cmnd.rw.dsmgmt = cpu_to_le32(dsmgmt); 84957dacad5SJay Sternberg 85057dacad5SJay Sternberg __nvme_submit_cmd(nvmeq, &cmnd); 85157dacad5SJay Sternberg 85257dacad5SJay Sternberg return 0; 85357dacad5SJay Sternberg } 85457dacad5SJay Sternberg 85557dacad5SJay Sternberg /* 85657dacad5SJay Sternberg * NOTE: ns is NULL when called on the admin queue. 85757dacad5SJay Sternberg */ 85857dacad5SJay Sternberg static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx, 85957dacad5SJay Sternberg const struct blk_mq_queue_data *bd) 86057dacad5SJay Sternberg { 86157dacad5SJay Sternberg struct nvme_ns *ns = hctx->queue->queuedata; 86257dacad5SJay Sternberg struct nvme_queue *nvmeq = hctx->driver_data; 86357dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 86457dacad5SJay Sternberg struct request *req = bd->rq; 86557dacad5SJay Sternberg struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); 86657dacad5SJay Sternberg struct nvme_iod *iod; 86757dacad5SJay Sternberg enum dma_data_direction dma_dir; 86857dacad5SJay Sternberg 86957dacad5SJay Sternberg /* 87057dacad5SJay Sternberg * If formated with metadata, require the block layer provide a buffer 87157dacad5SJay Sternberg * unless this namespace is formated such that the metadata can be 87257dacad5SJay Sternberg * stripped/generated by the controller with PRACT=1. 87357dacad5SJay Sternberg */ 87457dacad5SJay Sternberg if (ns && ns->ms && !blk_integrity_rq(req)) { 87557dacad5SJay Sternberg if (!(ns->pi_type && ns->ms == 8) && 87657dacad5SJay Sternberg req->cmd_type != REQ_TYPE_DRV_PRIV) { 87757dacad5SJay Sternberg blk_mq_complete_request(req, -EFAULT); 87857dacad5SJay Sternberg return BLK_MQ_RQ_QUEUE_OK; 87957dacad5SJay Sternberg } 88057dacad5SJay Sternberg } 88157dacad5SJay Sternberg 88257dacad5SJay Sternberg iod = nvme_alloc_iod(req, dev, GFP_ATOMIC); 88357dacad5SJay Sternberg if (!iod) 88457dacad5SJay Sternberg return BLK_MQ_RQ_QUEUE_BUSY; 88557dacad5SJay Sternberg 88657dacad5SJay Sternberg if (req->cmd_flags & REQ_DISCARD) { 88757dacad5SJay Sternberg void *range; 88857dacad5SJay Sternberg /* 88957dacad5SJay Sternberg * We reuse the small pool to allocate the 16-byte range here 89057dacad5SJay Sternberg * as it is not worth having a special pool for these or 89157dacad5SJay Sternberg * additional cases to handle freeing the iod. 89257dacad5SJay Sternberg */ 89357dacad5SJay Sternberg range = dma_pool_alloc(dev->prp_small_pool, GFP_ATOMIC, 89457dacad5SJay Sternberg &iod->first_dma); 89557dacad5SJay Sternberg if (!range) 89657dacad5SJay Sternberg goto retry_cmd; 89757dacad5SJay Sternberg iod_list(iod)[0] = (__le64 *)range; 89857dacad5SJay Sternberg iod->npages = 0; 89957dacad5SJay Sternberg } else if (req->nr_phys_segments) { 90057dacad5SJay Sternberg dma_dir = rq_data_dir(req) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; 90157dacad5SJay Sternberg 90257dacad5SJay Sternberg sg_init_table(iod->sg, req->nr_phys_segments); 90357dacad5SJay Sternberg iod->nents = blk_rq_map_sg(req->q, req, iod->sg); 90457dacad5SJay Sternberg if (!iod->nents) 90557dacad5SJay Sternberg goto error_cmd; 90657dacad5SJay Sternberg 90757dacad5SJay Sternberg if (!dma_map_sg(nvmeq->q_dmadev, iod->sg, iod->nents, dma_dir)) 90857dacad5SJay Sternberg goto retry_cmd; 90957dacad5SJay Sternberg 91057dacad5SJay Sternberg if (blk_rq_bytes(req) != 91157dacad5SJay Sternberg nvme_setup_prps(dev, iod, blk_rq_bytes(req), GFP_ATOMIC)) { 91257dacad5SJay Sternberg dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); 91357dacad5SJay Sternberg goto retry_cmd; 91457dacad5SJay Sternberg } 91557dacad5SJay Sternberg if (blk_integrity_rq(req)) { 916bf508e91SChristoph Hellwig if (blk_rq_count_integrity_sg(req->q, req->bio) != 1) { 917bf508e91SChristoph Hellwig dma_unmap_sg(dev->dev, iod->sg, iod->nents, 918bf508e91SChristoph Hellwig dma_dir); 91957dacad5SJay Sternberg goto error_cmd; 920bf508e91SChristoph Hellwig } 92157dacad5SJay Sternberg 92257dacad5SJay Sternberg sg_init_table(iod->meta_sg, 1); 92357dacad5SJay Sternberg if (blk_rq_map_integrity_sg( 924bf508e91SChristoph Hellwig req->q, req->bio, iod->meta_sg) != 1) { 925bf508e91SChristoph Hellwig dma_unmap_sg(dev->dev, iod->sg, iod->nents, 926bf508e91SChristoph Hellwig dma_dir); 92757dacad5SJay Sternberg goto error_cmd; 928bf508e91SChristoph Hellwig } 92957dacad5SJay Sternberg 93057dacad5SJay Sternberg if (rq_data_dir(req)) 93157dacad5SJay Sternberg nvme_dif_remap(req, nvme_dif_prep); 93257dacad5SJay Sternberg 933bf508e91SChristoph Hellwig if (!dma_map_sg(nvmeq->q_dmadev, iod->meta_sg, 1, dma_dir)) { 934bf508e91SChristoph Hellwig dma_unmap_sg(dev->dev, iod->sg, iod->nents, 935bf508e91SChristoph Hellwig dma_dir); 93657dacad5SJay Sternberg goto error_cmd; 93757dacad5SJay Sternberg } 93857dacad5SJay Sternberg } 939bf508e91SChristoph Hellwig } 94057dacad5SJay Sternberg 94157dacad5SJay Sternberg nvme_set_info(cmd, iod, req_completion); 94257dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 94357dacad5SJay Sternberg if (req->cmd_type == REQ_TYPE_DRV_PRIV) 94457dacad5SJay Sternberg nvme_submit_priv(nvmeq, req, iod); 94557dacad5SJay Sternberg else if (req->cmd_flags & REQ_DISCARD) 94657dacad5SJay Sternberg nvme_submit_discard(nvmeq, ns, req, iod); 94757dacad5SJay Sternberg else if (req->cmd_flags & REQ_FLUSH) 94857dacad5SJay Sternberg nvme_submit_flush(nvmeq, ns, req->tag); 94957dacad5SJay Sternberg else 95057dacad5SJay Sternberg nvme_submit_iod(nvmeq, iod, ns); 95157dacad5SJay Sternberg 95257dacad5SJay Sternberg nvme_process_cq(nvmeq); 95357dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 95457dacad5SJay Sternberg return BLK_MQ_RQ_QUEUE_OK; 95557dacad5SJay Sternberg 95657dacad5SJay Sternberg error_cmd: 95757dacad5SJay Sternberg nvme_free_iod(dev, iod); 95857dacad5SJay Sternberg return BLK_MQ_RQ_QUEUE_ERROR; 95957dacad5SJay Sternberg retry_cmd: 96057dacad5SJay Sternberg nvme_free_iod(dev, iod); 96157dacad5SJay Sternberg return BLK_MQ_RQ_QUEUE_BUSY; 96257dacad5SJay Sternberg } 96357dacad5SJay Sternberg 964a0fa9647SJens Axboe static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag) 96557dacad5SJay Sternberg { 96657dacad5SJay Sternberg u16 head, phase; 96757dacad5SJay Sternberg 96857dacad5SJay Sternberg head = nvmeq->cq_head; 96957dacad5SJay Sternberg phase = nvmeq->cq_phase; 97057dacad5SJay Sternberg 97157dacad5SJay Sternberg for (;;) { 97257dacad5SJay Sternberg void *ctx; 97357dacad5SJay Sternberg nvme_completion_fn fn; 97457dacad5SJay Sternberg struct nvme_completion cqe = nvmeq->cqes[head]; 97557dacad5SJay Sternberg if ((le16_to_cpu(cqe.status) & 1) != phase) 97657dacad5SJay Sternberg break; 97757dacad5SJay Sternberg nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 97857dacad5SJay Sternberg if (++head == nvmeq->q_depth) { 97957dacad5SJay Sternberg head = 0; 98057dacad5SJay Sternberg phase = !phase; 98157dacad5SJay Sternberg } 982a0fa9647SJens Axboe if (tag && *tag == cqe.command_id) 983a0fa9647SJens Axboe *tag = -1; 98457dacad5SJay Sternberg ctx = nvme_finish_cmd(nvmeq, cqe.command_id, &fn); 98557dacad5SJay Sternberg fn(nvmeq, ctx, &cqe); 98657dacad5SJay Sternberg } 98757dacad5SJay Sternberg 98857dacad5SJay Sternberg /* If the controller ignores the cq head doorbell and continuously 98957dacad5SJay Sternberg * writes to the queue, it is theoretically possible to wrap around 99057dacad5SJay Sternberg * the queue twice and mistakenly return IRQ_NONE. Linux only 99157dacad5SJay Sternberg * requires that 0.1% of your interrupts are handled, so this isn't 99257dacad5SJay Sternberg * a big problem. 99357dacad5SJay Sternberg */ 99457dacad5SJay Sternberg if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 995a0fa9647SJens Axboe return; 99657dacad5SJay Sternberg 997604e8c8dSKeith Busch if (likely(nvmeq->cq_vector >= 0)) 99857dacad5SJay Sternberg writel(head, nvmeq->q_db + nvmeq->dev->db_stride); 99957dacad5SJay Sternberg nvmeq->cq_head = head; 100057dacad5SJay Sternberg nvmeq->cq_phase = phase; 100157dacad5SJay Sternberg 100257dacad5SJay Sternberg nvmeq->cqe_seen = 1; 1003a0fa9647SJens Axboe } 1004a0fa9647SJens Axboe 1005a0fa9647SJens Axboe static void nvme_process_cq(struct nvme_queue *nvmeq) 1006a0fa9647SJens Axboe { 1007a0fa9647SJens Axboe __nvme_process_cq(nvmeq, NULL); 100857dacad5SJay Sternberg } 100957dacad5SJay Sternberg 101057dacad5SJay Sternberg static irqreturn_t nvme_irq(int irq, void *data) 101157dacad5SJay Sternberg { 101257dacad5SJay Sternberg irqreturn_t result; 101357dacad5SJay Sternberg struct nvme_queue *nvmeq = data; 101457dacad5SJay Sternberg spin_lock(&nvmeq->q_lock); 101557dacad5SJay Sternberg nvme_process_cq(nvmeq); 101657dacad5SJay Sternberg result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; 101757dacad5SJay Sternberg nvmeq->cqe_seen = 0; 101857dacad5SJay Sternberg spin_unlock(&nvmeq->q_lock); 101957dacad5SJay Sternberg return result; 102057dacad5SJay Sternberg } 102157dacad5SJay Sternberg 102257dacad5SJay Sternberg static irqreturn_t nvme_irq_check(int irq, void *data) 102357dacad5SJay Sternberg { 102457dacad5SJay Sternberg struct nvme_queue *nvmeq = data; 102557dacad5SJay Sternberg struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 102657dacad5SJay Sternberg if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 102757dacad5SJay Sternberg return IRQ_NONE; 102857dacad5SJay Sternberg return IRQ_WAKE_THREAD; 102957dacad5SJay Sternberg } 103057dacad5SJay Sternberg 1031a0fa9647SJens Axboe static int nvme_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) 1032a0fa9647SJens Axboe { 1033a0fa9647SJens Axboe struct nvme_queue *nvmeq = hctx->driver_data; 1034a0fa9647SJens Axboe 1035a0fa9647SJens Axboe if ((le16_to_cpu(nvmeq->cqes[nvmeq->cq_head].status) & 1) == 1036a0fa9647SJens Axboe nvmeq->cq_phase) { 1037a0fa9647SJens Axboe spin_lock_irq(&nvmeq->q_lock); 1038a0fa9647SJens Axboe __nvme_process_cq(nvmeq, &tag); 1039a0fa9647SJens Axboe spin_unlock_irq(&nvmeq->q_lock); 1040a0fa9647SJens Axboe 1041a0fa9647SJens Axboe if (tag == -1) 1042a0fa9647SJens Axboe return 1; 1043a0fa9647SJens Axboe } 1044a0fa9647SJens Axboe 1045a0fa9647SJens Axboe return 0; 1046a0fa9647SJens Axboe } 1047a0fa9647SJens Axboe 104857dacad5SJay Sternberg /* 104957dacad5SJay Sternberg * Returns 0 on success. If the result is negative, it's a Linux error code; 105057dacad5SJay Sternberg * if the result is positive, it's an NVM Express status code 105157dacad5SJay Sternberg */ 105257dacad5SJay Sternberg int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, 105357dacad5SJay Sternberg void *buffer, void __user *ubuffer, unsigned bufflen, 105457dacad5SJay Sternberg u32 *result, unsigned timeout) 105557dacad5SJay Sternberg { 105657dacad5SJay Sternberg bool write = cmd->common.opcode & 1; 105757dacad5SJay Sternberg struct bio *bio = NULL; 105857dacad5SJay Sternberg struct request *req; 105957dacad5SJay Sternberg int ret; 106057dacad5SJay Sternberg 10616f3b0e8bSChristoph Hellwig req = blk_mq_alloc_request(q, write, 0); 106257dacad5SJay Sternberg if (IS_ERR(req)) 106357dacad5SJay Sternberg return PTR_ERR(req); 106457dacad5SJay Sternberg 106557dacad5SJay Sternberg req->cmd_type = REQ_TYPE_DRV_PRIV; 106657dacad5SJay Sternberg req->cmd_flags |= REQ_FAILFAST_DRIVER; 106757dacad5SJay Sternberg req->__data_len = 0; 106857dacad5SJay Sternberg req->__sector = (sector_t) -1; 106957dacad5SJay Sternberg req->bio = req->biotail = NULL; 107057dacad5SJay Sternberg 107157dacad5SJay Sternberg req->timeout = timeout ? timeout : ADMIN_TIMEOUT; 107257dacad5SJay Sternberg 107357dacad5SJay Sternberg req->cmd = (unsigned char *)cmd; 107457dacad5SJay Sternberg req->cmd_len = sizeof(struct nvme_command); 107557dacad5SJay Sternberg req->special = (void *)0; 107657dacad5SJay Sternberg 107757dacad5SJay Sternberg if (buffer && bufflen) { 107871baba4bSMel Gorman ret = blk_rq_map_kern(q, req, buffer, bufflen, 107971baba4bSMel Gorman __GFP_DIRECT_RECLAIM); 108057dacad5SJay Sternberg if (ret) 108157dacad5SJay Sternberg goto out; 108257dacad5SJay Sternberg } else if (ubuffer && bufflen) { 108371baba4bSMel Gorman ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen, 108471baba4bSMel Gorman __GFP_DIRECT_RECLAIM); 108557dacad5SJay Sternberg if (ret) 108657dacad5SJay Sternberg goto out; 108757dacad5SJay Sternberg bio = req->bio; 108857dacad5SJay Sternberg } 108957dacad5SJay Sternberg 109057dacad5SJay Sternberg blk_execute_rq(req->q, NULL, req, 0); 109157dacad5SJay Sternberg if (bio) 109257dacad5SJay Sternberg blk_rq_unmap_user(bio); 109357dacad5SJay Sternberg if (result) 109457dacad5SJay Sternberg *result = (u32)(uintptr_t)req->special; 109557dacad5SJay Sternberg ret = req->errors; 109657dacad5SJay Sternberg out: 109757dacad5SJay Sternberg blk_mq_free_request(req); 109857dacad5SJay Sternberg return ret; 109957dacad5SJay Sternberg } 110057dacad5SJay Sternberg 110157dacad5SJay Sternberg int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, 110257dacad5SJay Sternberg void *buffer, unsigned bufflen) 110357dacad5SJay Sternberg { 110457dacad5SJay Sternberg return __nvme_submit_sync_cmd(q, cmd, buffer, NULL, bufflen, NULL, 0); 110557dacad5SJay Sternberg } 110657dacad5SJay Sternberg 110757dacad5SJay Sternberg static int nvme_submit_async_admin_req(struct nvme_dev *dev) 110857dacad5SJay Sternberg { 110957dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[0]; 111057dacad5SJay Sternberg struct nvme_command c; 111157dacad5SJay Sternberg struct nvme_cmd_info *cmd_info; 111257dacad5SJay Sternberg struct request *req; 111357dacad5SJay Sternberg 11146f3b0e8bSChristoph Hellwig req = blk_mq_alloc_request(dev->admin_q, WRITE, 11156f3b0e8bSChristoph Hellwig BLK_MQ_REQ_NOWAIT | BLK_MQ_REQ_RESERVED); 111657dacad5SJay Sternberg if (IS_ERR(req)) 111757dacad5SJay Sternberg return PTR_ERR(req); 111857dacad5SJay Sternberg 111957dacad5SJay Sternberg req->cmd_flags |= REQ_NO_TIMEOUT; 112057dacad5SJay Sternberg cmd_info = blk_mq_rq_to_pdu(req); 112157dacad5SJay Sternberg nvme_set_info(cmd_info, NULL, async_req_completion); 112257dacad5SJay Sternberg 112357dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 112457dacad5SJay Sternberg c.common.opcode = nvme_admin_async_event; 112557dacad5SJay Sternberg c.common.command_id = req->tag; 112657dacad5SJay Sternberg 112757dacad5SJay Sternberg blk_mq_free_request(req); 112857dacad5SJay Sternberg __nvme_submit_cmd(nvmeq, &c); 112957dacad5SJay Sternberg return 0; 113057dacad5SJay Sternberg } 113157dacad5SJay Sternberg 113257dacad5SJay Sternberg static int nvme_submit_admin_async_cmd(struct nvme_dev *dev, 113357dacad5SJay Sternberg struct nvme_command *cmd, 113457dacad5SJay Sternberg struct async_cmd_info *cmdinfo, unsigned timeout) 113557dacad5SJay Sternberg { 113657dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[0]; 113757dacad5SJay Sternberg struct request *req; 113857dacad5SJay Sternberg struct nvme_cmd_info *cmd_rq; 113957dacad5SJay Sternberg 11406f3b0e8bSChristoph Hellwig req = blk_mq_alloc_request(dev->admin_q, WRITE, 0); 114157dacad5SJay Sternberg if (IS_ERR(req)) 114257dacad5SJay Sternberg return PTR_ERR(req); 114357dacad5SJay Sternberg 114457dacad5SJay Sternberg req->timeout = timeout; 114557dacad5SJay Sternberg cmd_rq = blk_mq_rq_to_pdu(req); 114657dacad5SJay Sternberg cmdinfo->req = req; 114757dacad5SJay Sternberg nvme_set_info(cmd_rq, cmdinfo, async_completion); 114857dacad5SJay Sternberg cmdinfo->status = -EINTR; 114957dacad5SJay Sternberg 115057dacad5SJay Sternberg cmd->common.command_id = req->tag; 115157dacad5SJay Sternberg 115257dacad5SJay Sternberg nvme_submit_cmd(nvmeq, cmd); 115357dacad5SJay Sternberg return 0; 115457dacad5SJay Sternberg } 115557dacad5SJay Sternberg 115657dacad5SJay Sternberg static int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 115757dacad5SJay Sternberg { 115857dacad5SJay Sternberg struct nvme_command c; 115957dacad5SJay Sternberg 116057dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 116157dacad5SJay Sternberg c.delete_queue.opcode = opcode; 116257dacad5SJay Sternberg c.delete_queue.qid = cpu_to_le16(id); 116357dacad5SJay Sternberg 116457dacad5SJay Sternberg return nvme_submit_sync_cmd(dev->admin_q, &c, NULL, 0); 116557dacad5SJay Sternberg } 116657dacad5SJay Sternberg 116757dacad5SJay Sternberg static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 116857dacad5SJay Sternberg struct nvme_queue *nvmeq) 116957dacad5SJay Sternberg { 117057dacad5SJay Sternberg struct nvme_command c; 117157dacad5SJay Sternberg int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 117257dacad5SJay Sternberg 117357dacad5SJay Sternberg /* 117457dacad5SJay Sternberg * Note: we (ab)use the fact the the prp fields survive if no data 117557dacad5SJay Sternberg * is attached to the request. 117657dacad5SJay Sternberg */ 117757dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 117857dacad5SJay Sternberg c.create_cq.opcode = nvme_admin_create_cq; 117957dacad5SJay Sternberg c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 118057dacad5SJay Sternberg c.create_cq.cqid = cpu_to_le16(qid); 118157dacad5SJay Sternberg c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 118257dacad5SJay Sternberg c.create_cq.cq_flags = cpu_to_le16(flags); 118357dacad5SJay Sternberg c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 118457dacad5SJay Sternberg 118557dacad5SJay Sternberg return nvme_submit_sync_cmd(dev->admin_q, &c, NULL, 0); 118657dacad5SJay Sternberg } 118757dacad5SJay Sternberg 118857dacad5SJay Sternberg static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 118957dacad5SJay Sternberg struct nvme_queue *nvmeq) 119057dacad5SJay Sternberg { 119157dacad5SJay Sternberg struct nvme_command c; 119257dacad5SJay Sternberg int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 119357dacad5SJay Sternberg 119457dacad5SJay Sternberg /* 119557dacad5SJay Sternberg * Note: we (ab)use the fact the the prp fields survive if no data 119657dacad5SJay Sternberg * is attached to the request. 119757dacad5SJay Sternberg */ 119857dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 119957dacad5SJay Sternberg c.create_sq.opcode = nvme_admin_create_sq; 120057dacad5SJay Sternberg c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 120157dacad5SJay Sternberg c.create_sq.sqid = cpu_to_le16(qid); 120257dacad5SJay Sternberg c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 120357dacad5SJay Sternberg c.create_sq.sq_flags = cpu_to_le16(flags); 120457dacad5SJay Sternberg c.create_sq.cqid = cpu_to_le16(qid); 120557dacad5SJay Sternberg 120657dacad5SJay Sternberg return nvme_submit_sync_cmd(dev->admin_q, &c, NULL, 0); 120757dacad5SJay Sternberg } 120857dacad5SJay Sternberg 120957dacad5SJay Sternberg static int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 121057dacad5SJay Sternberg { 121157dacad5SJay Sternberg return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 121257dacad5SJay Sternberg } 121357dacad5SJay Sternberg 121457dacad5SJay Sternberg static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 121557dacad5SJay Sternberg { 121657dacad5SJay Sternberg return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 121757dacad5SJay Sternberg } 121857dacad5SJay Sternberg 121957dacad5SJay Sternberg int nvme_identify_ctrl(struct nvme_dev *dev, struct nvme_id_ctrl **id) 122057dacad5SJay Sternberg { 122157dacad5SJay Sternberg struct nvme_command c = { }; 122257dacad5SJay Sternberg int error; 122357dacad5SJay Sternberg 122457dacad5SJay Sternberg /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ 122557dacad5SJay Sternberg c.identify.opcode = nvme_admin_identify; 122657dacad5SJay Sternberg c.identify.cns = cpu_to_le32(1); 122757dacad5SJay Sternberg 122857dacad5SJay Sternberg *id = kmalloc(sizeof(struct nvme_id_ctrl), GFP_KERNEL); 122957dacad5SJay Sternberg if (!*id) 123057dacad5SJay Sternberg return -ENOMEM; 123157dacad5SJay Sternberg 123257dacad5SJay Sternberg error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, 123357dacad5SJay Sternberg sizeof(struct nvme_id_ctrl)); 123457dacad5SJay Sternberg if (error) 123557dacad5SJay Sternberg kfree(*id); 123657dacad5SJay Sternberg return error; 123757dacad5SJay Sternberg } 123857dacad5SJay Sternberg 123957dacad5SJay Sternberg int nvme_identify_ns(struct nvme_dev *dev, unsigned nsid, 124057dacad5SJay Sternberg struct nvme_id_ns **id) 124157dacad5SJay Sternberg { 124257dacad5SJay Sternberg struct nvme_command c = { }; 124357dacad5SJay Sternberg int error; 124457dacad5SJay Sternberg 124557dacad5SJay Sternberg /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ 124657dacad5SJay Sternberg c.identify.opcode = nvme_admin_identify, 124757dacad5SJay Sternberg c.identify.nsid = cpu_to_le32(nsid), 124857dacad5SJay Sternberg 124957dacad5SJay Sternberg *id = kmalloc(sizeof(struct nvme_id_ns), GFP_KERNEL); 125057dacad5SJay Sternberg if (!*id) 125157dacad5SJay Sternberg return -ENOMEM; 125257dacad5SJay Sternberg 125357dacad5SJay Sternberg error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, 125457dacad5SJay Sternberg sizeof(struct nvme_id_ns)); 125557dacad5SJay Sternberg if (error) 125657dacad5SJay Sternberg kfree(*id); 125757dacad5SJay Sternberg return error; 125857dacad5SJay Sternberg } 125957dacad5SJay Sternberg 126057dacad5SJay Sternberg int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid, 126157dacad5SJay Sternberg dma_addr_t dma_addr, u32 *result) 126257dacad5SJay Sternberg { 126357dacad5SJay Sternberg struct nvme_command c; 126457dacad5SJay Sternberg 126557dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 126657dacad5SJay Sternberg c.features.opcode = nvme_admin_get_features; 126757dacad5SJay Sternberg c.features.nsid = cpu_to_le32(nsid); 126857dacad5SJay Sternberg c.features.prp1 = cpu_to_le64(dma_addr); 126957dacad5SJay Sternberg c.features.fid = cpu_to_le32(fid); 127057dacad5SJay Sternberg 127157dacad5SJay Sternberg return __nvme_submit_sync_cmd(dev->admin_q, &c, NULL, NULL, 0, 127257dacad5SJay Sternberg result, 0); 127357dacad5SJay Sternberg } 127457dacad5SJay Sternberg 127557dacad5SJay Sternberg int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11, 127657dacad5SJay Sternberg dma_addr_t dma_addr, u32 *result) 127757dacad5SJay Sternberg { 127857dacad5SJay Sternberg struct nvme_command c; 127957dacad5SJay Sternberg 128057dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 128157dacad5SJay Sternberg c.features.opcode = nvme_admin_set_features; 128257dacad5SJay Sternberg c.features.prp1 = cpu_to_le64(dma_addr); 128357dacad5SJay Sternberg c.features.fid = cpu_to_le32(fid); 128457dacad5SJay Sternberg c.features.dword11 = cpu_to_le32(dword11); 128557dacad5SJay Sternberg 128657dacad5SJay Sternberg return __nvme_submit_sync_cmd(dev->admin_q, &c, NULL, NULL, 0, 128757dacad5SJay Sternberg result, 0); 128857dacad5SJay Sternberg } 128957dacad5SJay Sternberg 129057dacad5SJay Sternberg int nvme_get_log_page(struct nvme_dev *dev, struct nvme_smart_log **log) 129157dacad5SJay Sternberg { 129257dacad5SJay Sternberg struct nvme_command c = { }; 129357dacad5SJay Sternberg int error; 129457dacad5SJay Sternberg 129557dacad5SJay Sternberg c.common.opcode = nvme_admin_get_log_page, 129657dacad5SJay Sternberg c.common.nsid = cpu_to_le32(0xFFFFFFFF), 129757dacad5SJay Sternberg c.common.cdw10[0] = cpu_to_le32( 129857dacad5SJay Sternberg (((sizeof(struct nvme_smart_log) / 4) - 1) << 16) | 129957dacad5SJay Sternberg NVME_LOG_SMART), 130057dacad5SJay Sternberg 130157dacad5SJay Sternberg *log = kmalloc(sizeof(struct nvme_smart_log), GFP_KERNEL); 130257dacad5SJay Sternberg if (!*log) 130357dacad5SJay Sternberg return -ENOMEM; 130457dacad5SJay Sternberg 130557dacad5SJay Sternberg error = nvme_submit_sync_cmd(dev->admin_q, &c, *log, 130657dacad5SJay Sternberg sizeof(struct nvme_smart_log)); 130757dacad5SJay Sternberg if (error) 130857dacad5SJay Sternberg kfree(*log); 130957dacad5SJay Sternberg return error; 131057dacad5SJay Sternberg } 131157dacad5SJay Sternberg 131257dacad5SJay Sternberg /** 131357dacad5SJay Sternberg * nvme_abort_req - Attempt aborting a request 131457dacad5SJay Sternberg * 131557dacad5SJay Sternberg * Schedule controller reset if the command was already aborted once before and 131657dacad5SJay Sternberg * still hasn't been returned to the driver, or if this is the admin queue. 131757dacad5SJay Sternberg */ 131857dacad5SJay Sternberg static void nvme_abort_req(struct request *req) 131957dacad5SJay Sternberg { 132057dacad5SJay Sternberg struct nvme_cmd_info *cmd_rq = blk_mq_rq_to_pdu(req); 132157dacad5SJay Sternberg struct nvme_queue *nvmeq = cmd_rq->nvmeq; 132257dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 132357dacad5SJay Sternberg struct request *abort_req; 132457dacad5SJay Sternberg struct nvme_cmd_info *abort_cmd; 132557dacad5SJay Sternberg struct nvme_command cmd; 132657dacad5SJay Sternberg 132757dacad5SJay Sternberg if (!nvmeq->qid || cmd_rq->aborted) { 132857dacad5SJay Sternberg spin_lock(&dev_list_lock); 132957dacad5SJay Sternberg if (!__nvme_reset(dev)) { 133057dacad5SJay Sternberg dev_warn(dev->dev, 133157dacad5SJay Sternberg "I/O %d QID %d timeout, reset controller\n", 133257dacad5SJay Sternberg req->tag, nvmeq->qid); 133357dacad5SJay Sternberg } 133457dacad5SJay Sternberg spin_unlock(&dev_list_lock); 133557dacad5SJay Sternberg return; 133657dacad5SJay Sternberg } 133757dacad5SJay Sternberg 133857dacad5SJay Sternberg if (!dev->abort_limit) 133957dacad5SJay Sternberg return; 134057dacad5SJay Sternberg 13416f3b0e8bSChristoph Hellwig abort_req = blk_mq_alloc_request(dev->admin_q, WRITE, 13426f3b0e8bSChristoph Hellwig BLK_MQ_REQ_NOWAIT); 134357dacad5SJay Sternberg if (IS_ERR(abort_req)) 134457dacad5SJay Sternberg return; 134557dacad5SJay Sternberg 134657dacad5SJay Sternberg abort_cmd = blk_mq_rq_to_pdu(abort_req); 134757dacad5SJay Sternberg nvme_set_info(abort_cmd, abort_req, abort_completion); 134857dacad5SJay Sternberg 134957dacad5SJay Sternberg memset(&cmd, 0, sizeof(cmd)); 135057dacad5SJay Sternberg cmd.abort.opcode = nvme_admin_abort_cmd; 135157dacad5SJay Sternberg cmd.abort.cid = req->tag; 135257dacad5SJay Sternberg cmd.abort.sqid = cpu_to_le16(nvmeq->qid); 135357dacad5SJay Sternberg cmd.abort.command_id = abort_req->tag; 135457dacad5SJay Sternberg 135557dacad5SJay Sternberg --dev->abort_limit; 135657dacad5SJay Sternberg cmd_rq->aborted = 1; 135757dacad5SJay Sternberg 135857dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, "Aborting I/O %d QID %d\n", req->tag, 135957dacad5SJay Sternberg nvmeq->qid); 136057dacad5SJay Sternberg nvme_submit_cmd(dev->queues[0], &cmd); 136157dacad5SJay Sternberg } 136257dacad5SJay Sternberg 136357dacad5SJay Sternberg static void nvme_cancel_queue_ios(struct request *req, void *data, bool reserved) 136457dacad5SJay Sternberg { 136557dacad5SJay Sternberg struct nvme_queue *nvmeq = data; 136657dacad5SJay Sternberg void *ctx; 136757dacad5SJay Sternberg nvme_completion_fn fn; 136857dacad5SJay Sternberg struct nvme_cmd_info *cmd; 136957dacad5SJay Sternberg struct nvme_completion cqe; 137057dacad5SJay Sternberg 137157dacad5SJay Sternberg if (!blk_mq_request_started(req)) 137257dacad5SJay Sternberg return; 137357dacad5SJay Sternberg 137457dacad5SJay Sternberg cmd = blk_mq_rq_to_pdu(req); 137557dacad5SJay Sternberg 137657dacad5SJay Sternberg if (cmd->ctx == CMD_CTX_CANCELLED) 137757dacad5SJay Sternberg return; 137857dacad5SJay Sternberg 137957dacad5SJay Sternberg if (blk_queue_dying(req->q)) 138057dacad5SJay Sternberg cqe.status = cpu_to_le16((NVME_SC_ABORT_REQ | NVME_SC_DNR) << 1); 138157dacad5SJay Sternberg else 138257dacad5SJay Sternberg cqe.status = cpu_to_le16(NVME_SC_ABORT_REQ << 1); 138357dacad5SJay Sternberg 138457dacad5SJay Sternberg 138557dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d QID %d\n", 138657dacad5SJay Sternberg req->tag, nvmeq->qid); 138757dacad5SJay Sternberg ctx = cancel_cmd_info(cmd, &fn); 138857dacad5SJay Sternberg fn(nvmeq, ctx, &cqe); 138957dacad5SJay Sternberg } 139057dacad5SJay Sternberg 139157dacad5SJay Sternberg static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) 139257dacad5SJay Sternberg { 139357dacad5SJay Sternberg struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); 139457dacad5SJay Sternberg struct nvme_queue *nvmeq = cmd->nvmeq; 139557dacad5SJay Sternberg 139657dacad5SJay Sternberg dev_warn(nvmeq->q_dmadev, "Timeout I/O %d QID %d\n", req->tag, 139757dacad5SJay Sternberg nvmeq->qid); 139857dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 139957dacad5SJay Sternberg nvme_abort_req(req); 140057dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 140157dacad5SJay Sternberg 140257dacad5SJay Sternberg /* 140357dacad5SJay Sternberg * The aborted req will be completed on receiving the abort req. 140457dacad5SJay Sternberg * We enable the timer again. If hit twice, it'll cause a device reset, 140557dacad5SJay Sternberg * as the device then is in a faulty state. 140657dacad5SJay Sternberg */ 140757dacad5SJay Sternberg return BLK_EH_RESET_TIMER; 140857dacad5SJay Sternberg } 140957dacad5SJay Sternberg 141057dacad5SJay Sternberg static void nvme_free_queue(struct nvme_queue *nvmeq) 141157dacad5SJay Sternberg { 141257dacad5SJay Sternberg dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 141357dacad5SJay Sternberg (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 141457dacad5SJay Sternberg if (nvmeq->sq_cmds) 141557dacad5SJay Sternberg dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 141657dacad5SJay Sternberg nvmeq->sq_cmds, nvmeq->sq_dma_addr); 141757dacad5SJay Sternberg kfree(nvmeq); 141857dacad5SJay Sternberg } 141957dacad5SJay Sternberg 142057dacad5SJay Sternberg static void nvme_free_queues(struct nvme_dev *dev, int lowest) 142157dacad5SJay Sternberg { 142257dacad5SJay Sternberg int i; 142357dacad5SJay Sternberg 142457dacad5SJay Sternberg for (i = dev->queue_count - 1; i >= lowest; i--) { 142557dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 142657dacad5SJay Sternberg dev->queue_count--; 142757dacad5SJay Sternberg dev->queues[i] = NULL; 142857dacad5SJay Sternberg nvme_free_queue(nvmeq); 142957dacad5SJay Sternberg } 143057dacad5SJay Sternberg } 143157dacad5SJay Sternberg 143257dacad5SJay Sternberg /** 143357dacad5SJay Sternberg * nvme_suspend_queue - put queue into suspended state 143457dacad5SJay Sternberg * @nvmeq - queue to suspend 143557dacad5SJay Sternberg */ 143657dacad5SJay Sternberg static int nvme_suspend_queue(struct nvme_queue *nvmeq) 143757dacad5SJay Sternberg { 143857dacad5SJay Sternberg int vector; 143957dacad5SJay Sternberg 144057dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 144157dacad5SJay Sternberg if (nvmeq->cq_vector == -1) { 144257dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 144357dacad5SJay Sternberg return 1; 144457dacad5SJay Sternberg } 144557dacad5SJay Sternberg vector = nvmeq->dev->entry[nvmeq->cq_vector].vector; 144657dacad5SJay Sternberg nvmeq->dev->online_queues--; 144757dacad5SJay Sternberg nvmeq->cq_vector = -1; 144857dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 144957dacad5SJay Sternberg 145057dacad5SJay Sternberg if (!nvmeq->qid && nvmeq->dev->admin_q) 145157dacad5SJay Sternberg blk_mq_freeze_queue_start(nvmeq->dev->admin_q); 145257dacad5SJay Sternberg 145357dacad5SJay Sternberg irq_set_affinity_hint(vector, NULL); 145457dacad5SJay Sternberg free_irq(vector, nvmeq); 145557dacad5SJay Sternberg 145657dacad5SJay Sternberg return 0; 145757dacad5SJay Sternberg } 145857dacad5SJay Sternberg 145957dacad5SJay Sternberg static void nvme_clear_queue(struct nvme_queue *nvmeq) 146057dacad5SJay Sternberg { 146157dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 146257dacad5SJay Sternberg if (nvmeq->tags && *nvmeq->tags) 146357dacad5SJay Sternberg blk_mq_all_tag_busy_iter(*nvmeq->tags, nvme_cancel_queue_ios, nvmeq); 146457dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 146557dacad5SJay Sternberg } 146657dacad5SJay Sternberg 146757dacad5SJay Sternberg static void nvme_disable_queue(struct nvme_dev *dev, int qid) 146857dacad5SJay Sternberg { 146957dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[qid]; 147057dacad5SJay Sternberg 147157dacad5SJay Sternberg if (!nvmeq) 147257dacad5SJay Sternberg return; 147357dacad5SJay Sternberg if (nvme_suspend_queue(nvmeq)) 147457dacad5SJay Sternberg return; 147557dacad5SJay Sternberg 147657dacad5SJay Sternberg /* Don't tell the adapter to delete the admin queue. 147757dacad5SJay Sternberg * Don't tell a removed adapter to delete IO queues. */ 147857dacad5SJay Sternberg if (qid && readl(&dev->bar->csts) != -1) { 147957dacad5SJay Sternberg adapter_delete_sq(dev, qid); 148057dacad5SJay Sternberg adapter_delete_cq(dev, qid); 148157dacad5SJay Sternberg } 148257dacad5SJay Sternberg 148357dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 148457dacad5SJay Sternberg nvme_process_cq(nvmeq); 148557dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 148657dacad5SJay Sternberg } 148757dacad5SJay Sternberg 148857dacad5SJay Sternberg static int nvme_cmb_qdepth(struct nvme_dev *dev, int nr_io_queues, 148957dacad5SJay Sternberg int entry_size) 149057dacad5SJay Sternberg { 149157dacad5SJay Sternberg int q_depth = dev->q_depth; 149257dacad5SJay Sternberg unsigned q_size_aligned = roundup(q_depth * entry_size, dev->page_size); 149357dacad5SJay Sternberg 149457dacad5SJay Sternberg if (q_size_aligned * nr_io_queues > dev->cmb_size) { 149557dacad5SJay Sternberg u64 mem_per_q = div_u64(dev->cmb_size, nr_io_queues); 149657dacad5SJay Sternberg mem_per_q = round_down(mem_per_q, dev->page_size); 149757dacad5SJay Sternberg q_depth = div_u64(mem_per_q, entry_size); 149857dacad5SJay Sternberg 149957dacad5SJay Sternberg /* 150057dacad5SJay Sternberg * Ensure the reduced q_depth is above some threshold where it 150157dacad5SJay Sternberg * would be better to map queues in system memory with the 150257dacad5SJay Sternberg * original depth 150357dacad5SJay Sternberg */ 150457dacad5SJay Sternberg if (q_depth < 64) 150557dacad5SJay Sternberg return -ENOMEM; 150657dacad5SJay Sternberg } 150757dacad5SJay Sternberg 150857dacad5SJay Sternberg return q_depth; 150957dacad5SJay Sternberg } 151057dacad5SJay Sternberg 151157dacad5SJay Sternberg static int nvme_alloc_sq_cmds(struct nvme_dev *dev, struct nvme_queue *nvmeq, 151257dacad5SJay Sternberg int qid, int depth) 151357dacad5SJay Sternberg { 151457dacad5SJay Sternberg if (qid && dev->cmb && use_cmb_sqes && NVME_CMB_SQS(dev->cmbsz)) { 151557dacad5SJay Sternberg unsigned offset = (qid - 1) * 151657dacad5SJay Sternberg roundup(SQ_SIZE(depth), dev->page_size); 151757dacad5SJay Sternberg nvmeq->sq_dma_addr = dev->cmb_dma_addr + offset; 151857dacad5SJay Sternberg nvmeq->sq_cmds_io = dev->cmb + offset; 151957dacad5SJay Sternberg } else { 152057dacad5SJay Sternberg nvmeq->sq_cmds = dma_alloc_coherent(dev->dev, SQ_SIZE(depth), 152157dacad5SJay Sternberg &nvmeq->sq_dma_addr, GFP_KERNEL); 152257dacad5SJay Sternberg if (!nvmeq->sq_cmds) 152357dacad5SJay Sternberg return -ENOMEM; 152457dacad5SJay Sternberg } 152557dacad5SJay Sternberg 152657dacad5SJay Sternberg return 0; 152757dacad5SJay Sternberg } 152857dacad5SJay Sternberg 152957dacad5SJay Sternberg static struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 153057dacad5SJay Sternberg int depth) 153157dacad5SJay Sternberg { 153257dacad5SJay Sternberg struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq), GFP_KERNEL); 153357dacad5SJay Sternberg if (!nvmeq) 153457dacad5SJay Sternberg return NULL; 153557dacad5SJay Sternberg 153657dacad5SJay Sternberg nvmeq->cqes = dma_zalloc_coherent(dev->dev, CQ_SIZE(depth), 153757dacad5SJay Sternberg &nvmeq->cq_dma_addr, GFP_KERNEL); 153857dacad5SJay Sternberg if (!nvmeq->cqes) 153957dacad5SJay Sternberg goto free_nvmeq; 154057dacad5SJay Sternberg 154157dacad5SJay Sternberg if (nvme_alloc_sq_cmds(dev, nvmeq, qid, depth)) 154257dacad5SJay Sternberg goto free_cqdma; 154357dacad5SJay Sternberg 154457dacad5SJay Sternberg nvmeq->q_dmadev = dev->dev; 154557dacad5SJay Sternberg nvmeq->dev = dev; 154657dacad5SJay Sternberg snprintf(nvmeq->irqname, sizeof(nvmeq->irqname), "nvme%dq%d", 154757dacad5SJay Sternberg dev->instance, qid); 154857dacad5SJay Sternberg spin_lock_init(&nvmeq->q_lock); 154957dacad5SJay Sternberg nvmeq->cq_head = 0; 155057dacad5SJay Sternberg nvmeq->cq_phase = 1; 155157dacad5SJay Sternberg nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 155257dacad5SJay Sternberg nvmeq->q_depth = depth; 155357dacad5SJay Sternberg nvmeq->qid = qid; 155457dacad5SJay Sternberg nvmeq->cq_vector = -1; 155557dacad5SJay Sternberg dev->queues[qid] = nvmeq; 155657dacad5SJay Sternberg 155757dacad5SJay Sternberg /* make sure queue descriptor is set before queue count, for kthread */ 155857dacad5SJay Sternberg mb(); 155957dacad5SJay Sternberg dev->queue_count++; 156057dacad5SJay Sternberg 156157dacad5SJay Sternberg return nvmeq; 156257dacad5SJay Sternberg 156357dacad5SJay Sternberg free_cqdma: 156457dacad5SJay Sternberg dma_free_coherent(dev->dev, CQ_SIZE(depth), (void *)nvmeq->cqes, 156557dacad5SJay Sternberg nvmeq->cq_dma_addr); 156657dacad5SJay Sternberg free_nvmeq: 156757dacad5SJay Sternberg kfree(nvmeq); 156857dacad5SJay Sternberg return NULL; 156957dacad5SJay Sternberg } 157057dacad5SJay Sternberg 157157dacad5SJay Sternberg static int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 157257dacad5SJay Sternberg const char *name) 157357dacad5SJay Sternberg { 157457dacad5SJay Sternberg if (use_threaded_interrupts) 157557dacad5SJay Sternberg return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 157657dacad5SJay Sternberg nvme_irq_check, nvme_irq, IRQF_SHARED, 157757dacad5SJay Sternberg name, nvmeq); 157857dacad5SJay Sternberg return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 157957dacad5SJay Sternberg IRQF_SHARED, name, nvmeq); 158057dacad5SJay Sternberg } 158157dacad5SJay Sternberg 158257dacad5SJay Sternberg static void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) 158357dacad5SJay Sternberg { 158457dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 158557dacad5SJay Sternberg 158657dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 158757dacad5SJay Sternberg nvmeq->sq_tail = 0; 158857dacad5SJay Sternberg nvmeq->cq_head = 0; 158957dacad5SJay Sternberg nvmeq->cq_phase = 1; 159057dacad5SJay Sternberg nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 159157dacad5SJay Sternberg memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); 159257dacad5SJay Sternberg dev->online_queues++; 159357dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 159457dacad5SJay Sternberg } 159557dacad5SJay Sternberg 159657dacad5SJay Sternberg static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) 159757dacad5SJay Sternberg { 159857dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 159957dacad5SJay Sternberg int result; 160057dacad5SJay Sternberg 160157dacad5SJay Sternberg nvmeq->cq_vector = qid - 1; 160257dacad5SJay Sternberg result = adapter_alloc_cq(dev, qid, nvmeq); 160357dacad5SJay Sternberg if (result < 0) 160457dacad5SJay Sternberg return result; 160557dacad5SJay Sternberg 160657dacad5SJay Sternberg result = adapter_alloc_sq(dev, qid, nvmeq); 160757dacad5SJay Sternberg if (result < 0) 160857dacad5SJay Sternberg goto release_cq; 160957dacad5SJay Sternberg 161057dacad5SJay Sternberg result = queue_request_irq(dev, nvmeq, nvmeq->irqname); 161157dacad5SJay Sternberg if (result < 0) 161257dacad5SJay Sternberg goto release_sq; 161357dacad5SJay Sternberg 161457dacad5SJay Sternberg nvme_init_queue(nvmeq, qid); 161557dacad5SJay Sternberg return result; 161657dacad5SJay Sternberg 161757dacad5SJay Sternberg release_sq: 161857dacad5SJay Sternberg adapter_delete_sq(dev, qid); 161957dacad5SJay Sternberg release_cq: 162057dacad5SJay Sternberg adapter_delete_cq(dev, qid); 162157dacad5SJay Sternberg return result; 162257dacad5SJay Sternberg } 162357dacad5SJay Sternberg 162457dacad5SJay Sternberg static int nvme_wait_ready(struct nvme_dev *dev, u64 cap, bool enabled) 162557dacad5SJay Sternberg { 162657dacad5SJay Sternberg unsigned long timeout; 162757dacad5SJay Sternberg u32 bit = enabled ? NVME_CSTS_RDY : 0; 162857dacad5SJay Sternberg 162957dacad5SJay Sternberg timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; 163057dacad5SJay Sternberg 163157dacad5SJay Sternberg while ((readl(&dev->bar->csts) & NVME_CSTS_RDY) != bit) { 163257dacad5SJay Sternberg msleep(100); 163357dacad5SJay Sternberg if (fatal_signal_pending(current)) 163457dacad5SJay Sternberg return -EINTR; 163557dacad5SJay Sternberg if (time_after(jiffies, timeout)) { 163657dacad5SJay Sternberg dev_err(dev->dev, 163757dacad5SJay Sternberg "Device not ready; aborting %s\n", enabled ? 163857dacad5SJay Sternberg "initialisation" : "reset"); 163957dacad5SJay Sternberg return -ENODEV; 164057dacad5SJay Sternberg } 164157dacad5SJay Sternberg } 164257dacad5SJay Sternberg 164357dacad5SJay Sternberg return 0; 164457dacad5SJay Sternberg } 164557dacad5SJay Sternberg 164657dacad5SJay Sternberg /* 164757dacad5SJay Sternberg * If the device has been passed off to us in an enabled state, just clear 164857dacad5SJay Sternberg * the enabled bit. The spec says we should set the 'shutdown notification 164957dacad5SJay Sternberg * bits', but doing so may cause the device to complete commands to the 165057dacad5SJay Sternberg * admin queue ... and we don't know what memory that might be pointing at! 165157dacad5SJay Sternberg */ 165257dacad5SJay Sternberg static int nvme_disable_ctrl(struct nvme_dev *dev, u64 cap) 165357dacad5SJay Sternberg { 165457dacad5SJay Sternberg dev->ctrl_config &= ~NVME_CC_SHN_MASK; 165557dacad5SJay Sternberg dev->ctrl_config &= ~NVME_CC_ENABLE; 165657dacad5SJay Sternberg writel(dev->ctrl_config, &dev->bar->cc); 165757dacad5SJay Sternberg 165857dacad5SJay Sternberg return nvme_wait_ready(dev, cap, false); 165957dacad5SJay Sternberg } 166057dacad5SJay Sternberg 166157dacad5SJay Sternberg static int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap) 166257dacad5SJay Sternberg { 166357dacad5SJay Sternberg dev->ctrl_config &= ~NVME_CC_SHN_MASK; 166457dacad5SJay Sternberg dev->ctrl_config |= NVME_CC_ENABLE; 166557dacad5SJay Sternberg writel(dev->ctrl_config, &dev->bar->cc); 166657dacad5SJay Sternberg 166757dacad5SJay Sternberg return nvme_wait_ready(dev, cap, true); 166857dacad5SJay Sternberg } 166957dacad5SJay Sternberg 167057dacad5SJay Sternberg static int nvme_shutdown_ctrl(struct nvme_dev *dev) 167157dacad5SJay Sternberg { 167257dacad5SJay Sternberg unsigned long timeout; 167357dacad5SJay Sternberg 167457dacad5SJay Sternberg dev->ctrl_config &= ~NVME_CC_SHN_MASK; 167557dacad5SJay Sternberg dev->ctrl_config |= NVME_CC_SHN_NORMAL; 167657dacad5SJay Sternberg 167757dacad5SJay Sternberg writel(dev->ctrl_config, &dev->bar->cc); 167857dacad5SJay Sternberg 167957dacad5SJay Sternberg timeout = SHUTDOWN_TIMEOUT + jiffies; 168057dacad5SJay Sternberg while ((readl(&dev->bar->csts) & NVME_CSTS_SHST_MASK) != 168157dacad5SJay Sternberg NVME_CSTS_SHST_CMPLT) { 168257dacad5SJay Sternberg msleep(100); 168357dacad5SJay Sternberg if (fatal_signal_pending(current)) 168457dacad5SJay Sternberg return -EINTR; 168557dacad5SJay Sternberg if (time_after(jiffies, timeout)) { 168657dacad5SJay Sternberg dev_err(dev->dev, 168757dacad5SJay Sternberg "Device shutdown incomplete; abort shutdown\n"); 168857dacad5SJay Sternberg return -ENODEV; 168957dacad5SJay Sternberg } 169057dacad5SJay Sternberg } 169157dacad5SJay Sternberg 169257dacad5SJay Sternberg return 0; 169357dacad5SJay Sternberg } 169457dacad5SJay Sternberg 169557dacad5SJay Sternberg static struct blk_mq_ops nvme_mq_admin_ops = { 169657dacad5SJay Sternberg .queue_rq = nvme_queue_rq, 169757dacad5SJay Sternberg .map_queue = blk_mq_map_queue, 169857dacad5SJay Sternberg .init_hctx = nvme_admin_init_hctx, 169957dacad5SJay Sternberg .exit_hctx = nvme_admin_exit_hctx, 170057dacad5SJay Sternberg .init_request = nvme_admin_init_request, 170157dacad5SJay Sternberg .timeout = nvme_timeout, 170257dacad5SJay Sternberg }; 170357dacad5SJay Sternberg 170457dacad5SJay Sternberg static struct blk_mq_ops nvme_mq_ops = { 170557dacad5SJay Sternberg .queue_rq = nvme_queue_rq, 170657dacad5SJay Sternberg .map_queue = blk_mq_map_queue, 170757dacad5SJay Sternberg .init_hctx = nvme_init_hctx, 170857dacad5SJay Sternberg .init_request = nvme_init_request, 170957dacad5SJay Sternberg .timeout = nvme_timeout, 1710a0fa9647SJens Axboe .poll = nvme_poll, 171157dacad5SJay Sternberg }; 171257dacad5SJay Sternberg 171357dacad5SJay Sternberg static void nvme_dev_remove_admin(struct nvme_dev *dev) 171457dacad5SJay Sternberg { 171557dacad5SJay Sternberg if (dev->admin_q && !blk_queue_dying(dev->admin_q)) { 171657dacad5SJay Sternberg blk_cleanup_queue(dev->admin_q); 171757dacad5SJay Sternberg blk_mq_free_tag_set(&dev->admin_tagset); 171857dacad5SJay Sternberg } 171957dacad5SJay Sternberg } 172057dacad5SJay Sternberg 172157dacad5SJay Sternberg static int nvme_alloc_admin_tags(struct nvme_dev *dev) 172257dacad5SJay Sternberg { 172357dacad5SJay Sternberg if (!dev->admin_q) { 172457dacad5SJay Sternberg dev->admin_tagset.ops = &nvme_mq_admin_ops; 172557dacad5SJay Sternberg dev->admin_tagset.nr_hw_queues = 1; 172657dacad5SJay Sternberg dev->admin_tagset.queue_depth = NVME_AQ_DEPTH - 1; 172757dacad5SJay Sternberg dev->admin_tagset.reserved_tags = 1; 172857dacad5SJay Sternberg dev->admin_tagset.timeout = ADMIN_TIMEOUT; 172957dacad5SJay Sternberg dev->admin_tagset.numa_node = dev_to_node(dev->dev); 173057dacad5SJay Sternberg dev->admin_tagset.cmd_size = nvme_cmd_size(dev); 173157dacad5SJay Sternberg dev->admin_tagset.driver_data = dev; 173257dacad5SJay Sternberg 173357dacad5SJay Sternberg if (blk_mq_alloc_tag_set(&dev->admin_tagset)) 173457dacad5SJay Sternberg return -ENOMEM; 173557dacad5SJay Sternberg 173657dacad5SJay Sternberg dev->admin_q = blk_mq_init_queue(&dev->admin_tagset); 173757dacad5SJay Sternberg if (IS_ERR(dev->admin_q)) { 173857dacad5SJay Sternberg blk_mq_free_tag_set(&dev->admin_tagset); 173957dacad5SJay Sternberg return -ENOMEM; 174057dacad5SJay Sternberg } 174157dacad5SJay Sternberg if (!blk_get_queue(dev->admin_q)) { 174257dacad5SJay Sternberg nvme_dev_remove_admin(dev); 174357dacad5SJay Sternberg dev->admin_q = NULL; 174457dacad5SJay Sternberg return -ENODEV; 174557dacad5SJay Sternberg } 174657dacad5SJay Sternberg } else 174757dacad5SJay Sternberg blk_mq_unfreeze_queue(dev->admin_q); 174857dacad5SJay Sternberg 174957dacad5SJay Sternberg return 0; 175057dacad5SJay Sternberg } 175157dacad5SJay Sternberg 175257dacad5SJay Sternberg static int nvme_configure_admin_queue(struct nvme_dev *dev) 175357dacad5SJay Sternberg { 175457dacad5SJay Sternberg int result; 175557dacad5SJay Sternberg u32 aqa; 1756a310acd7SStephan Günther u64 cap = lo_hi_readq(&dev->bar->cap); 175757dacad5SJay Sternberg struct nvme_queue *nvmeq; 1758c5c9f25bSNishanth Aravamudan /* 1759c5c9f25bSNishanth Aravamudan * default to a 4K page size, with the intention to update this 1760c5c9f25bSNishanth Aravamudan * path in the future to accomodate architectures with differing 1761c5c9f25bSNishanth Aravamudan * kernel and IO page sizes. 1762c5c9f25bSNishanth Aravamudan */ 1763c5c9f25bSNishanth Aravamudan unsigned page_shift = 12; 176457dacad5SJay Sternberg unsigned dev_page_min = NVME_CAP_MPSMIN(cap) + 12; 176557dacad5SJay Sternberg 176657dacad5SJay Sternberg if (page_shift < dev_page_min) { 176757dacad5SJay Sternberg dev_err(dev->dev, 176857dacad5SJay Sternberg "Minimum device page size (%u) too large for " 176957dacad5SJay Sternberg "host (%u)\n", 1 << dev_page_min, 177057dacad5SJay Sternberg 1 << page_shift); 177157dacad5SJay Sternberg return -ENODEV; 177257dacad5SJay Sternberg } 177357dacad5SJay Sternberg 177457dacad5SJay Sternberg dev->subsystem = readl(&dev->bar->vs) >= NVME_VS(1, 1) ? 177557dacad5SJay Sternberg NVME_CAP_NSSRC(cap) : 0; 177657dacad5SJay Sternberg 177757dacad5SJay Sternberg if (dev->subsystem && (readl(&dev->bar->csts) & NVME_CSTS_NSSRO)) 177857dacad5SJay Sternberg writel(NVME_CSTS_NSSRO, &dev->bar->csts); 177957dacad5SJay Sternberg 178057dacad5SJay Sternberg result = nvme_disable_ctrl(dev, cap); 178157dacad5SJay Sternberg if (result < 0) 178257dacad5SJay Sternberg return result; 178357dacad5SJay Sternberg 178457dacad5SJay Sternberg nvmeq = dev->queues[0]; 178557dacad5SJay Sternberg if (!nvmeq) { 178657dacad5SJay Sternberg nvmeq = nvme_alloc_queue(dev, 0, NVME_AQ_DEPTH); 178757dacad5SJay Sternberg if (!nvmeq) 178857dacad5SJay Sternberg return -ENOMEM; 178957dacad5SJay Sternberg } 179057dacad5SJay Sternberg 179157dacad5SJay Sternberg aqa = nvmeq->q_depth - 1; 179257dacad5SJay Sternberg aqa |= aqa << 16; 179357dacad5SJay Sternberg 179457dacad5SJay Sternberg dev->page_size = 1 << page_shift; 179557dacad5SJay Sternberg 179657dacad5SJay Sternberg dev->ctrl_config = NVME_CC_CSS_NVM; 179757dacad5SJay Sternberg dev->ctrl_config |= (page_shift - 12) << NVME_CC_MPS_SHIFT; 179857dacad5SJay Sternberg dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; 179957dacad5SJay Sternberg dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; 180057dacad5SJay Sternberg 180157dacad5SJay Sternberg writel(aqa, &dev->bar->aqa); 1802a310acd7SStephan Günther lo_hi_writeq(nvmeq->sq_dma_addr, &dev->bar->asq); 1803a310acd7SStephan Günther lo_hi_writeq(nvmeq->cq_dma_addr, &dev->bar->acq); 180457dacad5SJay Sternberg 180557dacad5SJay Sternberg result = nvme_enable_ctrl(dev, cap); 180657dacad5SJay Sternberg if (result) 180757dacad5SJay Sternberg goto free_nvmeq; 180857dacad5SJay Sternberg 180957dacad5SJay Sternberg nvmeq->cq_vector = 0; 181057dacad5SJay Sternberg result = queue_request_irq(dev, nvmeq, nvmeq->irqname); 181157dacad5SJay Sternberg if (result) { 181257dacad5SJay Sternberg nvmeq->cq_vector = -1; 181357dacad5SJay Sternberg goto free_nvmeq; 181457dacad5SJay Sternberg } 181557dacad5SJay Sternberg 181657dacad5SJay Sternberg return result; 181757dacad5SJay Sternberg 181857dacad5SJay Sternberg free_nvmeq: 181957dacad5SJay Sternberg nvme_free_queues(dev, 0); 182057dacad5SJay Sternberg return result; 182157dacad5SJay Sternberg } 182257dacad5SJay Sternberg 182357dacad5SJay Sternberg static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) 182457dacad5SJay Sternberg { 182557dacad5SJay Sternberg struct nvme_dev *dev = ns->dev; 182657dacad5SJay Sternberg struct nvme_user_io io; 182757dacad5SJay Sternberg struct nvme_command c; 182857dacad5SJay Sternberg unsigned length, meta_len; 182957dacad5SJay Sternberg int status, write; 183057dacad5SJay Sternberg dma_addr_t meta_dma = 0; 183157dacad5SJay Sternberg void *meta = NULL; 183257dacad5SJay Sternberg void __user *metadata; 183357dacad5SJay Sternberg 183457dacad5SJay Sternberg if (copy_from_user(&io, uio, sizeof(io))) 183557dacad5SJay Sternberg return -EFAULT; 183657dacad5SJay Sternberg 183757dacad5SJay Sternberg switch (io.opcode) { 183857dacad5SJay Sternberg case nvme_cmd_write: 183957dacad5SJay Sternberg case nvme_cmd_read: 184057dacad5SJay Sternberg case nvme_cmd_compare: 184157dacad5SJay Sternberg break; 184257dacad5SJay Sternberg default: 184357dacad5SJay Sternberg return -EINVAL; 184457dacad5SJay Sternberg } 184557dacad5SJay Sternberg 184657dacad5SJay Sternberg length = (io.nblocks + 1) << ns->lba_shift; 184757dacad5SJay Sternberg meta_len = (io.nblocks + 1) * ns->ms; 18483d42e67fSArnd Bergmann metadata = (void __user *)(uintptr_t)io.metadata; 184957dacad5SJay Sternberg write = io.opcode & 1; 185057dacad5SJay Sternberg 185157dacad5SJay Sternberg if (ns->ext) { 185257dacad5SJay Sternberg length += meta_len; 185357dacad5SJay Sternberg meta_len = 0; 185457dacad5SJay Sternberg } 185557dacad5SJay Sternberg if (meta_len) { 185657dacad5SJay Sternberg if (((io.metadata & 3) || !io.metadata) && !ns->ext) 185757dacad5SJay Sternberg return -EINVAL; 185857dacad5SJay Sternberg 185957dacad5SJay Sternberg meta = dma_alloc_coherent(dev->dev, meta_len, 186057dacad5SJay Sternberg &meta_dma, GFP_KERNEL); 186157dacad5SJay Sternberg 186257dacad5SJay Sternberg if (!meta) { 186357dacad5SJay Sternberg status = -ENOMEM; 186457dacad5SJay Sternberg goto unmap; 186557dacad5SJay Sternberg } 186657dacad5SJay Sternberg if (write) { 186757dacad5SJay Sternberg if (copy_from_user(meta, metadata, meta_len)) { 186857dacad5SJay Sternberg status = -EFAULT; 186957dacad5SJay Sternberg goto unmap; 187057dacad5SJay Sternberg } 187157dacad5SJay Sternberg } 187257dacad5SJay Sternberg } 187357dacad5SJay Sternberg 187457dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 187557dacad5SJay Sternberg c.rw.opcode = io.opcode; 187657dacad5SJay Sternberg c.rw.flags = io.flags; 187757dacad5SJay Sternberg c.rw.nsid = cpu_to_le32(ns->ns_id); 187857dacad5SJay Sternberg c.rw.slba = cpu_to_le64(io.slba); 187957dacad5SJay Sternberg c.rw.length = cpu_to_le16(io.nblocks); 188057dacad5SJay Sternberg c.rw.control = cpu_to_le16(io.control); 188157dacad5SJay Sternberg c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); 188257dacad5SJay Sternberg c.rw.reftag = cpu_to_le32(io.reftag); 188357dacad5SJay Sternberg c.rw.apptag = cpu_to_le16(io.apptag); 188457dacad5SJay Sternberg c.rw.appmask = cpu_to_le16(io.appmask); 188557dacad5SJay Sternberg c.rw.metadata = cpu_to_le64(meta_dma); 188657dacad5SJay Sternberg 188757dacad5SJay Sternberg status = __nvme_submit_sync_cmd(ns->queue, &c, NULL, 18883d42e67fSArnd Bergmann (void __user *)(uintptr_t)io.addr, length, NULL, 0); 188957dacad5SJay Sternberg unmap: 189057dacad5SJay Sternberg if (meta) { 189157dacad5SJay Sternberg if (status == NVME_SC_SUCCESS && !write) { 189257dacad5SJay Sternberg if (copy_to_user(metadata, meta, meta_len)) 189357dacad5SJay Sternberg status = -EFAULT; 189457dacad5SJay Sternberg } 189557dacad5SJay Sternberg dma_free_coherent(dev->dev, meta_len, meta, meta_dma); 189657dacad5SJay Sternberg } 189757dacad5SJay Sternberg return status; 189857dacad5SJay Sternberg } 189957dacad5SJay Sternberg 190057dacad5SJay Sternberg static int nvme_user_cmd(struct nvme_dev *dev, struct nvme_ns *ns, 190157dacad5SJay Sternberg struct nvme_passthru_cmd __user *ucmd) 190257dacad5SJay Sternberg { 190357dacad5SJay Sternberg struct nvme_passthru_cmd cmd; 190457dacad5SJay Sternberg struct nvme_command c; 190557dacad5SJay Sternberg unsigned timeout = 0; 190657dacad5SJay Sternberg int status; 190757dacad5SJay Sternberg 190857dacad5SJay Sternberg if (!capable(CAP_SYS_ADMIN)) 190957dacad5SJay Sternberg return -EACCES; 191057dacad5SJay Sternberg if (copy_from_user(&cmd, ucmd, sizeof(cmd))) 191157dacad5SJay Sternberg return -EFAULT; 191257dacad5SJay Sternberg 191357dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 191457dacad5SJay Sternberg c.common.opcode = cmd.opcode; 191557dacad5SJay Sternberg c.common.flags = cmd.flags; 191657dacad5SJay Sternberg c.common.nsid = cpu_to_le32(cmd.nsid); 191757dacad5SJay Sternberg c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); 191857dacad5SJay Sternberg c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); 191957dacad5SJay Sternberg c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); 192057dacad5SJay Sternberg c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); 192157dacad5SJay Sternberg c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); 192257dacad5SJay Sternberg c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); 192357dacad5SJay Sternberg c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); 192457dacad5SJay Sternberg c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); 192557dacad5SJay Sternberg 192657dacad5SJay Sternberg if (cmd.timeout_ms) 192757dacad5SJay Sternberg timeout = msecs_to_jiffies(cmd.timeout_ms); 192857dacad5SJay Sternberg 192957dacad5SJay Sternberg status = __nvme_submit_sync_cmd(ns ? ns->queue : dev->admin_q, &c, 19303d42e67fSArnd Bergmann NULL, (void __user *)(uintptr_t)cmd.addr, cmd.data_len, 193157dacad5SJay Sternberg &cmd.result, timeout); 193257dacad5SJay Sternberg if (status >= 0) { 193357dacad5SJay Sternberg if (put_user(cmd.result, &ucmd->result)) 193457dacad5SJay Sternberg return -EFAULT; 193557dacad5SJay Sternberg } 193657dacad5SJay Sternberg 193757dacad5SJay Sternberg return status; 193857dacad5SJay Sternberg } 193957dacad5SJay Sternberg 194057dacad5SJay Sternberg static int nvme_subsys_reset(struct nvme_dev *dev) 194157dacad5SJay Sternberg { 194257dacad5SJay Sternberg if (!dev->subsystem) 194357dacad5SJay Sternberg return -ENOTTY; 194457dacad5SJay Sternberg 194557dacad5SJay Sternberg writel(0x4E564D65, &dev->bar->nssr); /* "NVMe" */ 194657dacad5SJay Sternberg return 0; 194757dacad5SJay Sternberg } 194857dacad5SJay Sternberg 194957dacad5SJay Sternberg static int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 195057dacad5SJay Sternberg unsigned long arg) 195157dacad5SJay Sternberg { 195257dacad5SJay Sternberg struct nvme_ns *ns = bdev->bd_disk->private_data; 195357dacad5SJay Sternberg 195457dacad5SJay Sternberg switch (cmd) { 195557dacad5SJay Sternberg case NVME_IOCTL_ID: 195657dacad5SJay Sternberg force_successful_syscall_return(); 195757dacad5SJay Sternberg return ns->ns_id; 195857dacad5SJay Sternberg case NVME_IOCTL_ADMIN_CMD: 195957dacad5SJay Sternberg return nvme_user_cmd(ns->dev, NULL, (void __user *)arg); 196057dacad5SJay Sternberg case NVME_IOCTL_IO_CMD: 196157dacad5SJay Sternberg return nvme_user_cmd(ns->dev, ns, (void __user *)arg); 196257dacad5SJay Sternberg case NVME_IOCTL_SUBMIT_IO: 196357dacad5SJay Sternberg return nvme_submit_io(ns, (void __user *)arg); 196457dacad5SJay Sternberg case SG_GET_VERSION_NUM: 196557dacad5SJay Sternberg return nvme_sg_get_version_num((void __user *)arg); 196657dacad5SJay Sternberg case SG_IO: 196757dacad5SJay Sternberg return nvme_sg_io(ns, (void __user *)arg); 196857dacad5SJay Sternberg default: 196957dacad5SJay Sternberg return -ENOTTY; 197057dacad5SJay Sternberg } 197157dacad5SJay Sternberg } 197257dacad5SJay Sternberg 197357dacad5SJay Sternberg #ifdef CONFIG_COMPAT 197457dacad5SJay Sternberg static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, 197557dacad5SJay Sternberg unsigned int cmd, unsigned long arg) 197657dacad5SJay Sternberg { 197757dacad5SJay Sternberg switch (cmd) { 197857dacad5SJay Sternberg case SG_IO: 197957dacad5SJay Sternberg return -ENOIOCTLCMD; 198057dacad5SJay Sternberg } 198157dacad5SJay Sternberg return nvme_ioctl(bdev, mode, cmd, arg); 198257dacad5SJay Sternberg } 198357dacad5SJay Sternberg #else 198457dacad5SJay Sternberg #define nvme_compat_ioctl NULL 198557dacad5SJay Sternberg #endif 198657dacad5SJay Sternberg 198757dacad5SJay Sternberg static void nvme_free_dev(struct kref *kref); 198857dacad5SJay Sternberg static void nvme_free_ns(struct kref *kref) 198957dacad5SJay Sternberg { 199057dacad5SJay Sternberg struct nvme_ns *ns = container_of(kref, struct nvme_ns, kref); 199157dacad5SJay Sternberg 1992ca064085SMatias Bjørling if (ns->type == NVME_NS_LIGHTNVM) 1993ca064085SMatias Bjørling nvme_nvm_unregister(ns->queue, ns->disk->disk_name); 1994ca064085SMatias Bjørling 199557dacad5SJay Sternberg spin_lock(&dev_list_lock); 199657dacad5SJay Sternberg ns->disk->private_data = NULL; 199757dacad5SJay Sternberg spin_unlock(&dev_list_lock); 199857dacad5SJay Sternberg 199957dacad5SJay Sternberg kref_put(&ns->dev->kref, nvme_free_dev); 200057dacad5SJay Sternberg put_disk(ns->disk); 200157dacad5SJay Sternberg kfree(ns); 200257dacad5SJay Sternberg } 200357dacad5SJay Sternberg 200457dacad5SJay Sternberg static int nvme_open(struct block_device *bdev, fmode_t mode) 200557dacad5SJay Sternberg { 200657dacad5SJay Sternberg int ret = 0; 200757dacad5SJay Sternberg struct nvme_ns *ns; 200857dacad5SJay Sternberg 200957dacad5SJay Sternberg spin_lock(&dev_list_lock); 201057dacad5SJay Sternberg ns = bdev->bd_disk->private_data; 201157dacad5SJay Sternberg if (!ns) 201257dacad5SJay Sternberg ret = -ENXIO; 201357dacad5SJay Sternberg else if (!kref_get_unless_zero(&ns->kref)) 201457dacad5SJay Sternberg ret = -ENXIO; 201557dacad5SJay Sternberg spin_unlock(&dev_list_lock); 201657dacad5SJay Sternberg 201757dacad5SJay Sternberg return ret; 201857dacad5SJay Sternberg } 201957dacad5SJay Sternberg 202057dacad5SJay Sternberg static void nvme_release(struct gendisk *disk, fmode_t mode) 202157dacad5SJay Sternberg { 202257dacad5SJay Sternberg struct nvme_ns *ns = disk->private_data; 202357dacad5SJay Sternberg kref_put(&ns->kref, nvme_free_ns); 202457dacad5SJay Sternberg } 202557dacad5SJay Sternberg 202657dacad5SJay Sternberg static int nvme_getgeo(struct block_device *bd, struct hd_geometry *geo) 202757dacad5SJay Sternberg { 202857dacad5SJay Sternberg /* some standard values */ 202957dacad5SJay Sternberg geo->heads = 1 << 6; 203057dacad5SJay Sternberg geo->sectors = 1 << 5; 203157dacad5SJay Sternberg geo->cylinders = get_capacity(bd->bd_disk) >> 11; 203257dacad5SJay Sternberg return 0; 203357dacad5SJay Sternberg } 203457dacad5SJay Sternberg 203557dacad5SJay Sternberg static void nvme_config_discard(struct nvme_ns *ns) 203657dacad5SJay Sternberg { 203757dacad5SJay Sternberg u32 logical_block_size = queue_logical_block_size(ns->queue); 203857dacad5SJay Sternberg ns->queue->limits.discard_zeroes_data = 0; 203957dacad5SJay Sternberg ns->queue->limits.discard_alignment = logical_block_size; 204057dacad5SJay Sternberg ns->queue->limits.discard_granularity = logical_block_size; 204157dacad5SJay Sternberg blk_queue_max_discard_sectors(ns->queue, 0xffffffff); 204257dacad5SJay Sternberg queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); 204357dacad5SJay Sternberg } 204457dacad5SJay Sternberg 204557dacad5SJay Sternberg static int nvme_revalidate_disk(struct gendisk *disk) 204657dacad5SJay Sternberg { 204757dacad5SJay Sternberg struct nvme_ns *ns = disk->private_data; 204857dacad5SJay Sternberg struct nvme_dev *dev = ns->dev; 204957dacad5SJay Sternberg struct nvme_id_ns *id; 205057dacad5SJay Sternberg u8 lbaf, pi_type; 205157dacad5SJay Sternberg u16 old_ms; 205257dacad5SJay Sternberg unsigned short bs; 205357dacad5SJay Sternberg 205457dacad5SJay Sternberg if (nvme_identify_ns(dev, ns->ns_id, &id)) { 205557dacad5SJay Sternberg dev_warn(dev->dev, "%s: Identify failure nvme%dn%d\n", __func__, 205657dacad5SJay Sternberg dev->instance, ns->ns_id); 205757dacad5SJay Sternberg return -ENODEV; 205857dacad5SJay Sternberg } 205957dacad5SJay Sternberg if (id->ncap == 0) { 206057dacad5SJay Sternberg kfree(id); 206157dacad5SJay Sternberg return -ENODEV; 206257dacad5SJay Sternberg } 206357dacad5SJay Sternberg 2064ca064085SMatias Bjørling if (nvme_nvm_ns_supported(ns, id) && ns->type != NVME_NS_LIGHTNVM) { 2065ca064085SMatias Bjørling if (nvme_nvm_register(ns->queue, disk->disk_name)) { 2066ca064085SMatias Bjørling dev_warn(dev->dev, 2067ca064085SMatias Bjørling "%s: LightNVM init failure\n", __func__); 2068ca064085SMatias Bjørling kfree(id); 2069ca064085SMatias Bjørling return -ENODEV; 2070ca064085SMatias Bjørling } 2071ca064085SMatias Bjørling ns->type = NVME_NS_LIGHTNVM; 2072ca064085SMatias Bjørling } 2073ca064085SMatias Bjørling 207457dacad5SJay Sternberg old_ms = ns->ms; 207557dacad5SJay Sternberg lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK; 207657dacad5SJay Sternberg ns->lba_shift = id->lbaf[lbaf].ds; 207757dacad5SJay Sternberg ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); 207857dacad5SJay Sternberg ns->ext = ns->ms && (id->flbas & NVME_NS_FLBAS_META_EXT); 207957dacad5SJay Sternberg 208057dacad5SJay Sternberg /* 208157dacad5SJay Sternberg * If identify namespace failed, use default 512 byte block size so 208257dacad5SJay Sternberg * block layer can use before failing read/write for 0 capacity. 208357dacad5SJay Sternberg */ 208457dacad5SJay Sternberg if (ns->lba_shift == 0) 208557dacad5SJay Sternberg ns->lba_shift = 9; 208657dacad5SJay Sternberg bs = 1 << ns->lba_shift; 208757dacad5SJay Sternberg 208857dacad5SJay Sternberg /* XXX: PI implementation requires metadata equal t10 pi tuple size */ 208957dacad5SJay Sternberg pi_type = ns->ms == sizeof(struct t10_pi_tuple) ? 209057dacad5SJay Sternberg id->dps & NVME_NS_DPS_PI_MASK : 0; 209157dacad5SJay Sternberg 20924cfc766eSDan Williams blk_mq_freeze_queue(disk->queue); 209357dacad5SJay Sternberg if (blk_get_integrity(disk) && (ns->pi_type != pi_type || 209457dacad5SJay Sternberg ns->ms != old_ms || 209557dacad5SJay Sternberg bs != queue_logical_block_size(disk->queue) || 209657dacad5SJay Sternberg (ns->ms && ns->ext))) 209757dacad5SJay Sternberg blk_integrity_unregister(disk); 209857dacad5SJay Sternberg 209957dacad5SJay Sternberg ns->pi_type = pi_type; 210057dacad5SJay Sternberg blk_queue_logical_block_size(ns->queue, bs); 210157dacad5SJay Sternberg 210225520d55SMartin K. Petersen if (ns->ms && !ns->ext) 210357dacad5SJay Sternberg nvme_init_integrity(ns); 210457dacad5SJay Sternberg 2105ca064085SMatias Bjørling if ((ns->ms && !(ns->ms == 8 && ns->pi_type) && 2106ca064085SMatias Bjørling !blk_get_integrity(disk)) || 2107ca064085SMatias Bjørling ns->type == NVME_NS_LIGHTNVM) 210857dacad5SJay Sternberg set_capacity(disk, 0); 210957dacad5SJay Sternberg else 211057dacad5SJay Sternberg set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); 211157dacad5SJay Sternberg 211257dacad5SJay Sternberg if (dev->oncs & NVME_CTRL_ONCS_DSM) 211357dacad5SJay Sternberg nvme_config_discard(ns); 21144cfc766eSDan Williams blk_mq_unfreeze_queue(disk->queue); 211557dacad5SJay Sternberg 211657dacad5SJay Sternberg kfree(id); 211757dacad5SJay Sternberg return 0; 211857dacad5SJay Sternberg } 211957dacad5SJay Sternberg 21201d277a63SKeith Busch static char nvme_pr_type(enum pr_type type) 21211d277a63SKeith Busch { 21221d277a63SKeith Busch switch (type) { 21231d277a63SKeith Busch case PR_WRITE_EXCLUSIVE: 21241d277a63SKeith Busch return 1; 21251d277a63SKeith Busch case PR_EXCLUSIVE_ACCESS: 21261d277a63SKeith Busch return 2; 21271d277a63SKeith Busch case PR_WRITE_EXCLUSIVE_REG_ONLY: 21281d277a63SKeith Busch return 3; 21291d277a63SKeith Busch case PR_EXCLUSIVE_ACCESS_REG_ONLY: 21301d277a63SKeith Busch return 4; 21311d277a63SKeith Busch case PR_WRITE_EXCLUSIVE_ALL_REGS: 21321d277a63SKeith Busch return 5; 21331d277a63SKeith Busch case PR_EXCLUSIVE_ACCESS_ALL_REGS: 21341d277a63SKeith Busch return 6; 21351d277a63SKeith Busch default: 21361d277a63SKeith Busch return 0; 21371d277a63SKeith Busch } 21381d277a63SKeith Busch }; 21391d277a63SKeith Busch 21401d277a63SKeith Busch static int nvme_pr_command(struct block_device *bdev, u32 cdw10, 21411d277a63SKeith Busch u64 key, u64 sa_key, u8 op) 21421d277a63SKeith Busch { 21431d277a63SKeith Busch struct nvme_ns *ns = bdev->bd_disk->private_data; 21441d277a63SKeith Busch struct nvme_command c; 21451d277a63SKeith Busch u8 data[16] = { 0, }; 21461d277a63SKeith Busch 21471d277a63SKeith Busch put_unaligned_le64(key, &data[0]); 21481d277a63SKeith Busch put_unaligned_le64(sa_key, &data[8]); 21491d277a63SKeith Busch 21501d277a63SKeith Busch memset(&c, 0, sizeof(c)); 21511d277a63SKeith Busch c.common.opcode = op; 2152a6dd1020SChristoph Hellwig c.common.nsid = cpu_to_le32(ns->ns_id); 2153a6dd1020SChristoph Hellwig c.common.cdw10[0] = cpu_to_le32(cdw10); 21541d277a63SKeith Busch 21551d277a63SKeith Busch return nvme_submit_sync_cmd(ns->queue, &c, data, 16); 21561d277a63SKeith Busch } 21571d277a63SKeith Busch 21581d277a63SKeith Busch static int nvme_pr_register(struct block_device *bdev, u64 old, 21591d277a63SKeith Busch u64 new, unsigned flags) 21601d277a63SKeith Busch { 21611d277a63SKeith Busch u32 cdw10; 21621d277a63SKeith Busch 21631d277a63SKeith Busch if (flags & ~PR_FL_IGNORE_KEY) 21641d277a63SKeith Busch return -EOPNOTSUPP; 21651d277a63SKeith Busch 21661d277a63SKeith Busch cdw10 = old ? 2 : 0; 21671d277a63SKeith Busch cdw10 |= (flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0; 21681d277a63SKeith Busch cdw10 |= (1 << 30) | (1 << 31); /* PTPL=1 */ 21691d277a63SKeith Busch return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register); 21701d277a63SKeith Busch } 21711d277a63SKeith Busch 21721d277a63SKeith Busch static int nvme_pr_reserve(struct block_device *bdev, u64 key, 21731d277a63SKeith Busch enum pr_type type, unsigned flags) 21741d277a63SKeith Busch { 21751d277a63SKeith Busch u32 cdw10; 21761d277a63SKeith Busch 21771d277a63SKeith Busch if (flags & ~PR_FL_IGNORE_KEY) 21781d277a63SKeith Busch return -EOPNOTSUPP; 21791d277a63SKeith Busch 21801d277a63SKeith Busch cdw10 = nvme_pr_type(type) << 8; 21811d277a63SKeith Busch cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0); 21821d277a63SKeith Busch return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire); 21831d277a63SKeith Busch } 21841d277a63SKeith Busch 21851d277a63SKeith Busch static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, 21861d277a63SKeith Busch enum pr_type type, bool abort) 21871d277a63SKeith Busch { 21881d277a63SKeith Busch u32 cdw10 = nvme_pr_type(type) << 8 | abort ? 2 : 1; 21891d277a63SKeith Busch return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire); 21901d277a63SKeith Busch } 21911d277a63SKeith Busch 21921d277a63SKeith Busch static int nvme_pr_clear(struct block_device *bdev, u64 key) 21931d277a63SKeith Busch { 219473fcf4e2SDan Carpenter u32 cdw10 = 1 | (key ? 1 << 3 : 0); 21951d277a63SKeith Busch return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_register); 21961d277a63SKeith Busch } 21971d277a63SKeith Busch 21981d277a63SKeith Busch static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type) 21991d277a63SKeith Busch { 22001d277a63SKeith Busch u32 cdw10 = nvme_pr_type(type) << 8 | key ? 1 << 3 : 0; 22011d277a63SKeith Busch return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); 22021d277a63SKeith Busch } 22031d277a63SKeith Busch 22041d277a63SKeith Busch static const struct pr_ops nvme_pr_ops = { 22051d277a63SKeith Busch .pr_register = nvme_pr_register, 22061d277a63SKeith Busch .pr_reserve = nvme_pr_reserve, 22071d277a63SKeith Busch .pr_release = nvme_pr_release, 22081d277a63SKeith Busch .pr_preempt = nvme_pr_preempt, 22091d277a63SKeith Busch .pr_clear = nvme_pr_clear, 22101d277a63SKeith Busch }; 22111d277a63SKeith Busch 221257dacad5SJay Sternberg static const struct block_device_operations nvme_fops = { 221357dacad5SJay Sternberg .owner = THIS_MODULE, 221457dacad5SJay Sternberg .ioctl = nvme_ioctl, 221557dacad5SJay Sternberg .compat_ioctl = nvme_compat_ioctl, 221657dacad5SJay Sternberg .open = nvme_open, 221757dacad5SJay Sternberg .release = nvme_release, 221857dacad5SJay Sternberg .getgeo = nvme_getgeo, 221957dacad5SJay Sternberg .revalidate_disk= nvme_revalidate_disk, 22201d277a63SKeith Busch .pr_ops = &nvme_pr_ops, 222157dacad5SJay Sternberg }; 222257dacad5SJay Sternberg 222357dacad5SJay Sternberg static int nvme_kthread(void *data) 222457dacad5SJay Sternberg { 222557dacad5SJay Sternberg struct nvme_dev *dev, *next; 222657dacad5SJay Sternberg 222757dacad5SJay Sternberg while (!kthread_should_stop()) { 222857dacad5SJay Sternberg set_current_state(TASK_INTERRUPTIBLE); 222957dacad5SJay Sternberg spin_lock(&dev_list_lock); 223057dacad5SJay Sternberg list_for_each_entry_safe(dev, next, &dev_list, node) { 223157dacad5SJay Sternberg int i; 223257dacad5SJay Sternberg u32 csts = readl(&dev->bar->csts); 223357dacad5SJay Sternberg 223457dacad5SJay Sternberg if ((dev->subsystem && (csts & NVME_CSTS_NSSRO)) || 223557dacad5SJay Sternberg csts & NVME_CSTS_CFS) { 223657dacad5SJay Sternberg if (!__nvme_reset(dev)) { 223757dacad5SJay Sternberg dev_warn(dev->dev, 223857dacad5SJay Sternberg "Failed status: %x, reset controller\n", 223957dacad5SJay Sternberg readl(&dev->bar->csts)); 224057dacad5SJay Sternberg } 224157dacad5SJay Sternberg continue; 224257dacad5SJay Sternberg } 224357dacad5SJay Sternberg for (i = 0; i < dev->queue_count; i++) { 224457dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 224557dacad5SJay Sternberg if (!nvmeq) 224657dacad5SJay Sternberg continue; 224757dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 224857dacad5SJay Sternberg nvme_process_cq(nvmeq); 224957dacad5SJay Sternberg 225057dacad5SJay Sternberg while ((i == 0) && (dev->event_limit > 0)) { 225157dacad5SJay Sternberg if (nvme_submit_async_admin_req(dev)) 225257dacad5SJay Sternberg break; 225357dacad5SJay Sternberg dev->event_limit--; 225457dacad5SJay Sternberg } 225557dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 225657dacad5SJay Sternberg } 225757dacad5SJay Sternberg } 225857dacad5SJay Sternberg spin_unlock(&dev_list_lock); 225957dacad5SJay Sternberg schedule_timeout(round_jiffies_relative(HZ)); 226057dacad5SJay Sternberg } 226157dacad5SJay Sternberg return 0; 226257dacad5SJay Sternberg } 226357dacad5SJay Sternberg 226457dacad5SJay Sternberg static void nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid) 226557dacad5SJay Sternberg { 226657dacad5SJay Sternberg struct nvme_ns *ns; 226757dacad5SJay Sternberg struct gendisk *disk; 226857dacad5SJay Sternberg int node = dev_to_node(dev->dev); 226957dacad5SJay Sternberg 227057dacad5SJay Sternberg ns = kzalloc_node(sizeof(*ns), GFP_KERNEL, node); 227157dacad5SJay Sternberg if (!ns) 227257dacad5SJay Sternberg return; 227357dacad5SJay Sternberg 227457dacad5SJay Sternberg ns->queue = blk_mq_init_queue(&dev->tagset); 227557dacad5SJay Sternberg if (IS_ERR(ns->queue)) 227657dacad5SJay Sternberg goto out_free_ns; 227757dacad5SJay Sternberg queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); 227857dacad5SJay Sternberg queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); 227957dacad5SJay Sternberg ns->dev = dev; 228057dacad5SJay Sternberg ns->queue->queuedata = ns; 228157dacad5SJay Sternberg 228257dacad5SJay Sternberg disk = alloc_disk_node(0, node); 228357dacad5SJay Sternberg if (!disk) 228457dacad5SJay Sternberg goto out_free_queue; 228557dacad5SJay Sternberg 228657dacad5SJay Sternberg kref_init(&ns->kref); 228757dacad5SJay Sternberg ns->ns_id = nsid; 228857dacad5SJay Sternberg ns->disk = disk; 228957dacad5SJay Sternberg ns->lba_shift = 9; /* set to a default value for 512 until disk is validated */ 229057dacad5SJay Sternberg list_add_tail(&ns->list, &dev->namespaces); 229157dacad5SJay Sternberg 229257dacad5SJay Sternberg blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); 229357dacad5SJay Sternberg if (dev->max_hw_sectors) { 229457dacad5SJay Sternberg blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); 229557dacad5SJay Sternberg blk_queue_max_segments(ns->queue, 22966824c5efSKeith Busch (dev->max_hw_sectors / (dev->page_size >> 9)) + 1); 229757dacad5SJay Sternberg } 229857dacad5SJay Sternberg if (dev->stripe_size) 229957dacad5SJay Sternberg blk_queue_chunk_sectors(ns->queue, dev->stripe_size >> 9); 230057dacad5SJay Sternberg if (dev->vwc & NVME_CTRL_VWC_PRESENT) 230157dacad5SJay Sternberg blk_queue_flush(ns->queue, REQ_FLUSH | REQ_FUA); 230257dacad5SJay Sternberg blk_queue_virt_boundary(ns->queue, dev->page_size - 1); 230357dacad5SJay Sternberg 230457dacad5SJay Sternberg disk->major = nvme_major; 230557dacad5SJay Sternberg disk->first_minor = 0; 230657dacad5SJay Sternberg disk->fops = &nvme_fops; 230757dacad5SJay Sternberg disk->private_data = ns; 230857dacad5SJay Sternberg disk->queue = ns->queue; 230957dacad5SJay Sternberg disk->driverfs_dev = dev->device; 231057dacad5SJay Sternberg disk->flags = GENHD_FL_EXT_DEVT; 231157dacad5SJay Sternberg sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); 231257dacad5SJay Sternberg 231357dacad5SJay Sternberg /* 231457dacad5SJay Sternberg * Initialize capacity to 0 until we establish the namespace format and 231557dacad5SJay Sternberg * setup integrity extentions if necessary. The revalidate_disk after 231657dacad5SJay Sternberg * add_disk allows the driver to register with integrity if the format 231757dacad5SJay Sternberg * requires it. 231857dacad5SJay Sternberg */ 231957dacad5SJay Sternberg set_capacity(disk, 0); 232057dacad5SJay Sternberg if (nvme_revalidate_disk(ns->disk)) 232157dacad5SJay Sternberg goto out_free_disk; 232257dacad5SJay Sternberg 232357dacad5SJay Sternberg kref_get(&dev->kref); 2324ca064085SMatias Bjørling if (ns->type != NVME_NS_LIGHTNVM) { 232557dacad5SJay Sternberg add_disk(ns->disk); 232657dacad5SJay Sternberg if (ns->ms) { 232757dacad5SJay Sternberg struct block_device *bd = bdget_disk(ns->disk, 0); 232857dacad5SJay Sternberg if (!bd) 232957dacad5SJay Sternberg return; 233057dacad5SJay Sternberg if (blkdev_get(bd, FMODE_READ, NULL)) { 233157dacad5SJay Sternberg bdput(bd); 233257dacad5SJay Sternberg return; 233357dacad5SJay Sternberg } 233457dacad5SJay Sternberg blkdev_reread_part(bd); 233557dacad5SJay Sternberg blkdev_put(bd, FMODE_READ); 233657dacad5SJay Sternberg } 2337ca064085SMatias Bjørling } 233857dacad5SJay Sternberg return; 233957dacad5SJay Sternberg out_free_disk: 234057dacad5SJay Sternberg kfree(disk); 234157dacad5SJay Sternberg list_del(&ns->list); 234257dacad5SJay Sternberg out_free_queue: 234357dacad5SJay Sternberg blk_cleanup_queue(ns->queue); 234457dacad5SJay Sternberg out_free_ns: 234557dacad5SJay Sternberg kfree(ns); 234657dacad5SJay Sternberg } 234757dacad5SJay Sternberg 234857dacad5SJay Sternberg /* 234957dacad5SJay Sternberg * Create I/O queues. Failing to create an I/O queue is not an issue, 235057dacad5SJay Sternberg * we can continue with less than the desired amount of queues, and 235157dacad5SJay Sternberg * even a controller without I/O queues an still be used to issue 235257dacad5SJay Sternberg * admin commands. This might be useful to upgrade a buggy firmware 235357dacad5SJay Sternberg * for example. 235457dacad5SJay Sternberg */ 235557dacad5SJay Sternberg static void nvme_create_io_queues(struct nvme_dev *dev) 235657dacad5SJay Sternberg { 235757dacad5SJay Sternberg unsigned i; 235857dacad5SJay Sternberg 235957dacad5SJay Sternberg for (i = dev->queue_count; i <= dev->max_qid; i++) 236057dacad5SJay Sternberg if (!nvme_alloc_queue(dev, i, dev->q_depth)) 236157dacad5SJay Sternberg break; 236257dacad5SJay Sternberg 236357dacad5SJay Sternberg for (i = dev->online_queues; i <= dev->queue_count - 1; i++) 236457dacad5SJay Sternberg if (nvme_create_queue(dev->queues[i], i)) { 236557dacad5SJay Sternberg nvme_free_queues(dev, i); 236657dacad5SJay Sternberg break; 236757dacad5SJay Sternberg } 236857dacad5SJay Sternberg } 236957dacad5SJay Sternberg 237057dacad5SJay Sternberg static int set_queue_count(struct nvme_dev *dev, int count) 237157dacad5SJay Sternberg { 237257dacad5SJay Sternberg int status; 237357dacad5SJay Sternberg u32 result; 237457dacad5SJay Sternberg u32 q_count = (count - 1) | ((count - 1) << 16); 237557dacad5SJay Sternberg 237657dacad5SJay Sternberg status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, 237757dacad5SJay Sternberg &result); 237857dacad5SJay Sternberg if (status < 0) 237957dacad5SJay Sternberg return status; 238057dacad5SJay Sternberg if (status > 0) { 238157dacad5SJay Sternberg dev_err(dev->dev, "Could not set queue count (%d)\n", status); 238257dacad5SJay Sternberg return 0; 238357dacad5SJay Sternberg } 238457dacad5SJay Sternberg return min(result & 0xffff, result >> 16) + 1; 238557dacad5SJay Sternberg } 238657dacad5SJay Sternberg 238757dacad5SJay Sternberg static void __iomem *nvme_map_cmb(struct nvme_dev *dev) 238857dacad5SJay Sternberg { 238957dacad5SJay Sternberg u64 szu, size, offset; 239057dacad5SJay Sternberg u32 cmbloc; 239157dacad5SJay Sternberg resource_size_t bar_size; 239257dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 239357dacad5SJay Sternberg void __iomem *cmb; 239457dacad5SJay Sternberg dma_addr_t dma_addr; 239557dacad5SJay Sternberg 239657dacad5SJay Sternberg if (!use_cmb_sqes) 239757dacad5SJay Sternberg return NULL; 239857dacad5SJay Sternberg 239957dacad5SJay Sternberg dev->cmbsz = readl(&dev->bar->cmbsz); 240057dacad5SJay Sternberg if (!(NVME_CMB_SZ(dev->cmbsz))) 240157dacad5SJay Sternberg return NULL; 240257dacad5SJay Sternberg 240357dacad5SJay Sternberg cmbloc = readl(&dev->bar->cmbloc); 240457dacad5SJay Sternberg 240557dacad5SJay Sternberg szu = (u64)1 << (12 + 4 * NVME_CMB_SZU(dev->cmbsz)); 240657dacad5SJay Sternberg size = szu * NVME_CMB_SZ(dev->cmbsz); 240757dacad5SJay Sternberg offset = szu * NVME_CMB_OFST(cmbloc); 240857dacad5SJay Sternberg bar_size = pci_resource_len(pdev, NVME_CMB_BIR(cmbloc)); 240957dacad5SJay Sternberg 241057dacad5SJay Sternberg if (offset > bar_size) 241157dacad5SJay Sternberg return NULL; 241257dacad5SJay Sternberg 241357dacad5SJay Sternberg /* 241457dacad5SJay Sternberg * Controllers may support a CMB size larger than their BAR, 241557dacad5SJay Sternberg * for example, due to being behind a bridge. Reduce the CMB to 241657dacad5SJay Sternberg * the reported size of the BAR 241757dacad5SJay Sternberg */ 241857dacad5SJay Sternberg if (size > bar_size - offset) 241957dacad5SJay Sternberg size = bar_size - offset; 242057dacad5SJay Sternberg 242157dacad5SJay Sternberg dma_addr = pci_resource_start(pdev, NVME_CMB_BIR(cmbloc)) + offset; 242257dacad5SJay Sternberg cmb = ioremap_wc(dma_addr, size); 242357dacad5SJay Sternberg if (!cmb) 242457dacad5SJay Sternberg return NULL; 242557dacad5SJay Sternberg 242657dacad5SJay Sternberg dev->cmb_dma_addr = dma_addr; 242757dacad5SJay Sternberg dev->cmb_size = size; 242857dacad5SJay Sternberg return cmb; 242957dacad5SJay Sternberg } 243057dacad5SJay Sternberg 243157dacad5SJay Sternberg static inline void nvme_release_cmb(struct nvme_dev *dev) 243257dacad5SJay Sternberg { 243357dacad5SJay Sternberg if (dev->cmb) { 243457dacad5SJay Sternberg iounmap(dev->cmb); 243557dacad5SJay Sternberg dev->cmb = NULL; 243657dacad5SJay Sternberg } 243757dacad5SJay Sternberg } 243857dacad5SJay Sternberg 243957dacad5SJay Sternberg static size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) 244057dacad5SJay Sternberg { 244157dacad5SJay Sternberg return 4096 + ((nr_io_queues + 1) * 8 * dev->db_stride); 244257dacad5SJay Sternberg } 244357dacad5SJay Sternberg 244457dacad5SJay Sternberg static int nvme_setup_io_queues(struct nvme_dev *dev) 244557dacad5SJay Sternberg { 244657dacad5SJay Sternberg struct nvme_queue *adminq = dev->queues[0]; 244757dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 244857dacad5SJay Sternberg int result, i, vecs, nr_io_queues, size; 244957dacad5SJay Sternberg 245057dacad5SJay Sternberg nr_io_queues = num_possible_cpus(); 245157dacad5SJay Sternberg result = set_queue_count(dev, nr_io_queues); 245257dacad5SJay Sternberg if (result <= 0) 245357dacad5SJay Sternberg return result; 245457dacad5SJay Sternberg if (result < nr_io_queues) 245557dacad5SJay Sternberg nr_io_queues = result; 245657dacad5SJay Sternberg 245757dacad5SJay Sternberg if (dev->cmb && NVME_CMB_SQS(dev->cmbsz)) { 245857dacad5SJay Sternberg result = nvme_cmb_qdepth(dev, nr_io_queues, 245957dacad5SJay Sternberg sizeof(struct nvme_command)); 246057dacad5SJay Sternberg if (result > 0) 246157dacad5SJay Sternberg dev->q_depth = result; 246257dacad5SJay Sternberg else 246357dacad5SJay Sternberg nvme_release_cmb(dev); 246457dacad5SJay Sternberg } 246557dacad5SJay Sternberg 246657dacad5SJay Sternberg size = db_bar_size(dev, nr_io_queues); 246757dacad5SJay Sternberg if (size > 8192) { 246857dacad5SJay Sternberg iounmap(dev->bar); 246957dacad5SJay Sternberg do { 247057dacad5SJay Sternberg dev->bar = ioremap(pci_resource_start(pdev, 0), size); 247157dacad5SJay Sternberg if (dev->bar) 247257dacad5SJay Sternberg break; 247357dacad5SJay Sternberg if (!--nr_io_queues) 247457dacad5SJay Sternberg return -ENOMEM; 247557dacad5SJay Sternberg size = db_bar_size(dev, nr_io_queues); 247657dacad5SJay Sternberg } while (1); 247757dacad5SJay Sternberg dev->dbs = ((void __iomem *)dev->bar) + 4096; 247857dacad5SJay Sternberg adminq->q_db = dev->dbs; 247957dacad5SJay Sternberg } 248057dacad5SJay Sternberg 248157dacad5SJay Sternberg /* Deregister the admin queue's interrupt */ 248257dacad5SJay Sternberg free_irq(dev->entry[0].vector, adminq); 248357dacad5SJay Sternberg 248457dacad5SJay Sternberg /* 248557dacad5SJay Sternberg * If we enable msix early due to not intx, disable it again before 248657dacad5SJay Sternberg * setting up the full range we need. 248757dacad5SJay Sternberg */ 248857dacad5SJay Sternberg if (!pdev->irq) 248957dacad5SJay Sternberg pci_disable_msix(pdev); 249057dacad5SJay Sternberg 249157dacad5SJay Sternberg for (i = 0; i < nr_io_queues; i++) 249257dacad5SJay Sternberg dev->entry[i].entry = i; 249357dacad5SJay Sternberg vecs = pci_enable_msix_range(pdev, dev->entry, 1, nr_io_queues); 249457dacad5SJay Sternberg if (vecs < 0) { 249557dacad5SJay Sternberg vecs = pci_enable_msi_range(pdev, 1, min(nr_io_queues, 32)); 249657dacad5SJay Sternberg if (vecs < 0) { 249757dacad5SJay Sternberg vecs = 1; 249857dacad5SJay Sternberg } else { 249957dacad5SJay Sternberg for (i = 0; i < vecs; i++) 250057dacad5SJay Sternberg dev->entry[i].vector = i + pdev->irq; 250157dacad5SJay Sternberg } 250257dacad5SJay Sternberg } 250357dacad5SJay Sternberg 250457dacad5SJay Sternberg /* 250557dacad5SJay Sternberg * Should investigate if there's a performance win from allocating 250657dacad5SJay Sternberg * more queues than interrupt vectors; it might allow the submission 250757dacad5SJay Sternberg * path to scale better, even if the receive path is limited by the 250857dacad5SJay Sternberg * number of interrupts. 250957dacad5SJay Sternberg */ 251057dacad5SJay Sternberg nr_io_queues = vecs; 251157dacad5SJay Sternberg dev->max_qid = nr_io_queues; 251257dacad5SJay Sternberg 251357dacad5SJay Sternberg result = queue_request_irq(dev, adminq, adminq->irqname); 251457dacad5SJay Sternberg if (result) { 251557dacad5SJay Sternberg adminq->cq_vector = -1; 251657dacad5SJay Sternberg goto free_queues; 251757dacad5SJay Sternberg } 251857dacad5SJay Sternberg 251957dacad5SJay Sternberg /* Free previously allocated queues that are no longer usable */ 252057dacad5SJay Sternberg nvme_free_queues(dev, nr_io_queues + 1); 252157dacad5SJay Sternberg nvme_create_io_queues(dev); 252257dacad5SJay Sternberg 252357dacad5SJay Sternberg return 0; 252457dacad5SJay Sternberg 252557dacad5SJay Sternberg free_queues: 252657dacad5SJay Sternberg nvme_free_queues(dev, 1); 252757dacad5SJay Sternberg return result; 252857dacad5SJay Sternberg } 252957dacad5SJay Sternberg 253057dacad5SJay Sternberg static int ns_cmp(void *priv, struct list_head *a, struct list_head *b) 253157dacad5SJay Sternberg { 253257dacad5SJay Sternberg struct nvme_ns *nsa = container_of(a, struct nvme_ns, list); 253357dacad5SJay Sternberg struct nvme_ns *nsb = container_of(b, struct nvme_ns, list); 253457dacad5SJay Sternberg 253557dacad5SJay Sternberg return nsa->ns_id - nsb->ns_id; 253657dacad5SJay Sternberg } 253757dacad5SJay Sternberg 253857dacad5SJay Sternberg static struct nvme_ns *nvme_find_ns(struct nvme_dev *dev, unsigned nsid) 253957dacad5SJay Sternberg { 254057dacad5SJay Sternberg struct nvme_ns *ns; 254157dacad5SJay Sternberg 254257dacad5SJay Sternberg list_for_each_entry(ns, &dev->namespaces, list) { 254357dacad5SJay Sternberg if (ns->ns_id == nsid) 254457dacad5SJay Sternberg return ns; 254557dacad5SJay Sternberg if (ns->ns_id > nsid) 254657dacad5SJay Sternberg break; 254757dacad5SJay Sternberg } 254857dacad5SJay Sternberg return NULL; 254957dacad5SJay Sternberg } 255057dacad5SJay Sternberg 255157dacad5SJay Sternberg static inline bool nvme_io_incapable(struct nvme_dev *dev) 255257dacad5SJay Sternberg { 255357dacad5SJay Sternberg return (!dev->bar || readl(&dev->bar->csts) & NVME_CSTS_CFS || 255457dacad5SJay Sternberg dev->online_queues < 2); 255557dacad5SJay Sternberg } 255657dacad5SJay Sternberg 255757dacad5SJay Sternberg static void nvme_ns_remove(struct nvme_ns *ns) 255857dacad5SJay Sternberg { 255957dacad5SJay Sternberg bool kill = nvme_io_incapable(ns->dev) && !blk_queue_dying(ns->queue); 256057dacad5SJay Sternberg 256157dacad5SJay Sternberg if (kill) 256257dacad5SJay Sternberg blk_set_queue_dying(ns->queue); 25639609b994SDan Williams if (ns->disk->flags & GENHD_FL_UP) 256457dacad5SJay Sternberg del_gendisk(ns->disk); 256557dacad5SJay Sternberg if (kill || !blk_queue_dying(ns->queue)) { 256657dacad5SJay Sternberg blk_mq_abort_requeue_list(ns->queue); 256757dacad5SJay Sternberg blk_cleanup_queue(ns->queue); 256857dacad5SJay Sternberg } 256957dacad5SJay Sternberg list_del_init(&ns->list); 257057dacad5SJay Sternberg kref_put(&ns->kref, nvme_free_ns); 257157dacad5SJay Sternberg } 257257dacad5SJay Sternberg 257357dacad5SJay Sternberg static void nvme_scan_namespaces(struct nvme_dev *dev, unsigned nn) 257457dacad5SJay Sternberg { 257557dacad5SJay Sternberg struct nvme_ns *ns, *next; 257657dacad5SJay Sternberg unsigned i; 257757dacad5SJay Sternberg 257857dacad5SJay Sternberg for (i = 1; i <= nn; i++) { 257957dacad5SJay Sternberg ns = nvme_find_ns(dev, i); 258057dacad5SJay Sternberg if (ns) { 258157dacad5SJay Sternberg if (revalidate_disk(ns->disk)) 258257dacad5SJay Sternberg nvme_ns_remove(ns); 258357dacad5SJay Sternberg } else 258457dacad5SJay Sternberg nvme_alloc_ns(dev, i); 258557dacad5SJay Sternberg } 258657dacad5SJay Sternberg list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 258757dacad5SJay Sternberg if (ns->ns_id > nn) 258857dacad5SJay Sternberg nvme_ns_remove(ns); 258957dacad5SJay Sternberg } 259057dacad5SJay Sternberg list_sort(NULL, &dev->namespaces, ns_cmp); 259157dacad5SJay Sternberg } 259257dacad5SJay Sternberg 259357dacad5SJay Sternberg static void nvme_set_irq_hints(struct nvme_dev *dev) 259457dacad5SJay Sternberg { 259557dacad5SJay Sternberg struct nvme_queue *nvmeq; 259657dacad5SJay Sternberg int i; 259757dacad5SJay Sternberg 259857dacad5SJay Sternberg for (i = 0; i < dev->online_queues; i++) { 259957dacad5SJay Sternberg nvmeq = dev->queues[i]; 260057dacad5SJay Sternberg 260157dacad5SJay Sternberg if (!nvmeq->tags || !(*nvmeq->tags)) 260257dacad5SJay Sternberg continue; 260357dacad5SJay Sternberg 260457dacad5SJay Sternberg irq_set_affinity_hint(dev->entry[nvmeq->cq_vector].vector, 260557dacad5SJay Sternberg blk_mq_tags_cpumask(*nvmeq->tags)); 260657dacad5SJay Sternberg } 260757dacad5SJay Sternberg } 260857dacad5SJay Sternberg 260957dacad5SJay Sternberg static void nvme_dev_scan(struct work_struct *work) 261057dacad5SJay Sternberg { 261157dacad5SJay Sternberg struct nvme_dev *dev = container_of(work, struct nvme_dev, scan_work); 261257dacad5SJay Sternberg struct nvme_id_ctrl *ctrl; 261357dacad5SJay Sternberg 261457dacad5SJay Sternberg if (!dev->tagset.tags) 261557dacad5SJay Sternberg return; 261657dacad5SJay Sternberg if (nvme_identify_ctrl(dev, &ctrl)) 261757dacad5SJay Sternberg return; 261857dacad5SJay Sternberg nvme_scan_namespaces(dev, le32_to_cpup(&ctrl->nn)); 261957dacad5SJay Sternberg kfree(ctrl); 262057dacad5SJay Sternberg nvme_set_irq_hints(dev); 262157dacad5SJay Sternberg } 262257dacad5SJay Sternberg 262357dacad5SJay Sternberg /* 262457dacad5SJay Sternberg * Return: error value if an error occurred setting up the queues or calling 262557dacad5SJay Sternberg * Identify Device. 0 if these succeeded, even if adding some of the 262657dacad5SJay Sternberg * namespaces failed. At the moment, these failures are silent. TBD which 262757dacad5SJay Sternberg * failures should be reported. 262857dacad5SJay Sternberg */ 262957dacad5SJay Sternberg static int nvme_dev_add(struct nvme_dev *dev) 263057dacad5SJay Sternberg { 263157dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 263257dacad5SJay Sternberg int res; 263357dacad5SJay Sternberg struct nvme_id_ctrl *ctrl; 2634a310acd7SStephan Günther int shift = NVME_CAP_MPSMIN(lo_hi_readq(&dev->bar->cap)) + 12; 263557dacad5SJay Sternberg 263657dacad5SJay Sternberg res = nvme_identify_ctrl(dev, &ctrl); 263757dacad5SJay Sternberg if (res) { 263857dacad5SJay Sternberg dev_err(dev->dev, "Identify Controller failed (%d)\n", res); 263957dacad5SJay Sternberg return -EIO; 264057dacad5SJay Sternberg } 264157dacad5SJay Sternberg 264257dacad5SJay Sternberg dev->oncs = le16_to_cpup(&ctrl->oncs); 264357dacad5SJay Sternberg dev->abort_limit = ctrl->acl + 1; 264457dacad5SJay Sternberg dev->vwc = ctrl->vwc; 264557dacad5SJay Sternberg memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); 264657dacad5SJay Sternberg memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); 264757dacad5SJay Sternberg memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); 264857dacad5SJay Sternberg if (ctrl->mdts) 264957dacad5SJay Sternberg dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); 2650b12363d0SSathyavathi M else 2651b12363d0SSathyavathi M dev->max_hw_sectors = UINT_MAX; 265257dacad5SJay Sternberg if ((pdev->vendor == PCI_VENDOR_ID_INTEL) && 265357dacad5SJay Sternberg (pdev->device == 0x0953) && ctrl->vs[3]) { 265457dacad5SJay Sternberg unsigned int max_hw_sectors; 265557dacad5SJay Sternberg 265657dacad5SJay Sternberg dev->stripe_size = 1 << (ctrl->vs[3] + shift); 265757dacad5SJay Sternberg max_hw_sectors = dev->stripe_size >> (shift - 9); 265857dacad5SJay Sternberg if (dev->max_hw_sectors) { 265957dacad5SJay Sternberg dev->max_hw_sectors = min(max_hw_sectors, 266057dacad5SJay Sternberg dev->max_hw_sectors); 266157dacad5SJay Sternberg } else 266257dacad5SJay Sternberg dev->max_hw_sectors = max_hw_sectors; 266357dacad5SJay Sternberg } 266457dacad5SJay Sternberg kfree(ctrl); 266557dacad5SJay Sternberg 266657dacad5SJay Sternberg if (!dev->tagset.tags) { 266757dacad5SJay Sternberg dev->tagset.ops = &nvme_mq_ops; 266857dacad5SJay Sternberg dev->tagset.nr_hw_queues = dev->online_queues - 1; 266957dacad5SJay Sternberg dev->tagset.timeout = NVME_IO_TIMEOUT; 267057dacad5SJay Sternberg dev->tagset.numa_node = dev_to_node(dev->dev); 267157dacad5SJay Sternberg dev->tagset.queue_depth = 267257dacad5SJay Sternberg min_t(int, dev->q_depth, BLK_MQ_MAX_DEPTH) - 1; 267357dacad5SJay Sternberg dev->tagset.cmd_size = nvme_cmd_size(dev); 267457dacad5SJay Sternberg dev->tagset.flags = BLK_MQ_F_SHOULD_MERGE; 267557dacad5SJay Sternberg dev->tagset.driver_data = dev; 267657dacad5SJay Sternberg 267757dacad5SJay Sternberg if (blk_mq_alloc_tag_set(&dev->tagset)) 267857dacad5SJay Sternberg return 0; 267957dacad5SJay Sternberg } 268057dacad5SJay Sternberg schedule_work(&dev->scan_work); 268157dacad5SJay Sternberg return 0; 268257dacad5SJay Sternberg } 268357dacad5SJay Sternberg 268457dacad5SJay Sternberg static int nvme_dev_map(struct nvme_dev *dev) 268557dacad5SJay Sternberg { 268657dacad5SJay Sternberg u64 cap; 268757dacad5SJay Sternberg int bars, result = -ENOMEM; 268857dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 268957dacad5SJay Sternberg 269057dacad5SJay Sternberg if (pci_enable_device_mem(pdev)) 269157dacad5SJay Sternberg return result; 269257dacad5SJay Sternberg 269357dacad5SJay Sternberg dev->entry[0].vector = pdev->irq; 269457dacad5SJay Sternberg pci_set_master(pdev); 269557dacad5SJay Sternberg bars = pci_select_bars(pdev, IORESOURCE_MEM); 269657dacad5SJay Sternberg if (!bars) 269757dacad5SJay Sternberg goto disable_pci; 269857dacad5SJay Sternberg 269957dacad5SJay Sternberg if (pci_request_selected_regions(pdev, bars, "nvme")) 270057dacad5SJay Sternberg goto disable_pci; 270157dacad5SJay Sternberg 270257dacad5SJay Sternberg if (dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(64)) && 270357dacad5SJay Sternberg dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(32))) 270457dacad5SJay Sternberg goto disable; 270557dacad5SJay Sternberg 270657dacad5SJay Sternberg dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 270757dacad5SJay Sternberg if (!dev->bar) 270857dacad5SJay Sternberg goto disable; 270957dacad5SJay Sternberg 271057dacad5SJay Sternberg if (readl(&dev->bar->csts) == -1) { 271157dacad5SJay Sternberg result = -ENODEV; 271257dacad5SJay Sternberg goto unmap; 271357dacad5SJay Sternberg } 271457dacad5SJay Sternberg 271557dacad5SJay Sternberg /* 271657dacad5SJay Sternberg * Some devices don't advertse INTx interrupts, pre-enable a single 271757dacad5SJay Sternberg * MSIX vec for setup. We'll adjust this later. 271857dacad5SJay Sternberg */ 271957dacad5SJay Sternberg if (!pdev->irq) { 272057dacad5SJay Sternberg result = pci_enable_msix(pdev, dev->entry, 1); 272157dacad5SJay Sternberg if (result < 0) 272257dacad5SJay Sternberg goto unmap; 272357dacad5SJay Sternberg } 272457dacad5SJay Sternberg 2725a310acd7SStephan Günther cap = lo_hi_readq(&dev->bar->cap); 272657dacad5SJay Sternberg dev->q_depth = min_t(int, NVME_CAP_MQES(cap) + 1, NVME_Q_DEPTH); 272757dacad5SJay Sternberg dev->db_stride = 1 << NVME_CAP_STRIDE(cap); 272857dacad5SJay Sternberg dev->dbs = ((void __iomem *)dev->bar) + 4096; 272957dacad5SJay Sternberg if (readl(&dev->bar->vs) >= NVME_VS(1, 2)) 273057dacad5SJay Sternberg dev->cmb = nvme_map_cmb(dev); 273157dacad5SJay Sternberg 273257dacad5SJay Sternberg return 0; 273357dacad5SJay Sternberg 273457dacad5SJay Sternberg unmap: 273557dacad5SJay Sternberg iounmap(dev->bar); 273657dacad5SJay Sternberg dev->bar = NULL; 273757dacad5SJay Sternberg disable: 273857dacad5SJay Sternberg pci_release_regions(pdev); 273957dacad5SJay Sternberg disable_pci: 274057dacad5SJay Sternberg pci_disable_device(pdev); 274157dacad5SJay Sternberg return result; 274257dacad5SJay Sternberg } 274357dacad5SJay Sternberg 274457dacad5SJay Sternberg static void nvme_dev_unmap(struct nvme_dev *dev) 274557dacad5SJay Sternberg { 274657dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 274757dacad5SJay Sternberg 274857dacad5SJay Sternberg if (pdev->msi_enabled) 274957dacad5SJay Sternberg pci_disable_msi(pdev); 275057dacad5SJay Sternberg else if (pdev->msix_enabled) 275157dacad5SJay Sternberg pci_disable_msix(pdev); 275257dacad5SJay Sternberg 275357dacad5SJay Sternberg if (dev->bar) { 275457dacad5SJay Sternberg iounmap(dev->bar); 275557dacad5SJay Sternberg dev->bar = NULL; 275657dacad5SJay Sternberg pci_release_regions(pdev); 275757dacad5SJay Sternberg } 275857dacad5SJay Sternberg 275957dacad5SJay Sternberg if (pci_is_enabled(pdev)) 276057dacad5SJay Sternberg pci_disable_device(pdev); 276157dacad5SJay Sternberg } 276257dacad5SJay Sternberg 276357dacad5SJay Sternberg struct nvme_delq_ctx { 276457dacad5SJay Sternberg struct task_struct *waiter; 276557dacad5SJay Sternberg struct kthread_worker *worker; 276657dacad5SJay Sternberg atomic_t refcount; 276757dacad5SJay Sternberg }; 276857dacad5SJay Sternberg 276957dacad5SJay Sternberg static void nvme_wait_dq(struct nvme_delq_ctx *dq, struct nvme_dev *dev) 277057dacad5SJay Sternberg { 277157dacad5SJay Sternberg dq->waiter = current; 277257dacad5SJay Sternberg mb(); 277357dacad5SJay Sternberg 277457dacad5SJay Sternberg for (;;) { 277557dacad5SJay Sternberg set_current_state(TASK_KILLABLE); 277657dacad5SJay Sternberg if (!atomic_read(&dq->refcount)) 277757dacad5SJay Sternberg break; 277857dacad5SJay Sternberg if (!schedule_timeout(ADMIN_TIMEOUT) || 277957dacad5SJay Sternberg fatal_signal_pending(current)) { 278057dacad5SJay Sternberg /* 278157dacad5SJay Sternberg * Disable the controller first since we can't trust it 278257dacad5SJay Sternberg * at this point, but leave the admin queue enabled 278357dacad5SJay Sternberg * until all queue deletion requests are flushed. 278457dacad5SJay Sternberg * FIXME: This may take a while if there are more h/w 278557dacad5SJay Sternberg * queues than admin tags. 278657dacad5SJay Sternberg */ 278757dacad5SJay Sternberg set_current_state(TASK_RUNNING); 2788a310acd7SStephan Günther nvme_disable_ctrl(dev, lo_hi_readq(&dev->bar->cap)); 278957dacad5SJay Sternberg nvme_clear_queue(dev->queues[0]); 279057dacad5SJay Sternberg flush_kthread_worker(dq->worker); 279157dacad5SJay Sternberg nvme_disable_queue(dev, 0); 279257dacad5SJay Sternberg return; 279357dacad5SJay Sternberg } 279457dacad5SJay Sternberg } 279557dacad5SJay Sternberg set_current_state(TASK_RUNNING); 279657dacad5SJay Sternberg } 279757dacad5SJay Sternberg 279857dacad5SJay Sternberg static void nvme_put_dq(struct nvme_delq_ctx *dq) 279957dacad5SJay Sternberg { 280057dacad5SJay Sternberg atomic_dec(&dq->refcount); 280157dacad5SJay Sternberg if (dq->waiter) 280257dacad5SJay Sternberg wake_up_process(dq->waiter); 280357dacad5SJay Sternberg } 280457dacad5SJay Sternberg 280557dacad5SJay Sternberg static struct nvme_delq_ctx *nvme_get_dq(struct nvme_delq_ctx *dq) 280657dacad5SJay Sternberg { 280757dacad5SJay Sternberg atomic_inc(&dq->refcount); 280857dacad5SJay Sternberg return dq; 280957dacad5SJay Sternberg } 281057dacad5SJay Sternberg 281157dacad5SJay Sternberg static void nvme_del_queue_end(struct nvme_queue *nvmeq) 281257dacad5SJay Sternberg { 281357dacad5SJay Sternberg struct nvme_delq_ctx *dq = nvmeq->cmdinfo.ctx; 281457dacad5SJay Sternberg nvme_put_dq(dq); 2815604e8c8dSKeith Busch 2816604e8c8dSKeith Busch spin_lock_irq(&nvmeq->q_lock); 2817604e8c8dSKeith Busch nvme_process_cq(nvmeq); 2818604e8c8dSKeith Busch spin_unlock_irq(&nvmeq->q_lock); 281957dacad5SJay Sternberg } 282057dacad5SJay Sternberg 282157dacad5SJay Sternberg static int adapter_async_del_queue(struct nvme_queue *nvmeq, u8 opcode, 282257dacad5SJay Sternberg kthread_work_func_t fn) 282357dacad5SJay Sternberg { 282457dacad5SJay Sternberg struct nvme_command c; 282557dacad5SJay Sternberg 282657dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 282757dacad5SJay Sternberg c.delete_queue.opcode = opcode; 282857dacad5SJay Sternberg c.delete_queue.qid = cpu_to_le16(nvmeq->qid); 282957dacad5SJay Sternberg 283057dacad5SJay Sternberg init_kthread_work(&nvmeq->cmdinfo.work, fn); 283157dacad5SJay Sternberg return nvme_submit_admin_async_cmd(nvmeq->dev, &c, &nvmeq->cmdinfo, 283257dacad5SJay Sternberg ADMIN_TIMEOUT); 283357dacad5SJay Sternberg } 283457dacad5SJay Sternberg 283557dacad5SJay Sternberg static void nvme_del_cq_work_handler(struct kthread_work *work) 283657dacad5SJay Sternberg { 283757dacad5SJay Sternberg struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 283857dacad5SJay Sternberg cmdinfo.work); 283957dacad5SJay Sternberg nvme_del_queue_end(nvmeq); 284057dacad5SJay Sternberg } 284157dacad5SJay Sternberg 284257dacad5SJay Sternberg static int nvme_delete_cq(struct nvme_queue *nvmeq) 284357dacad5SJay Sternberg { 284457dacad5SJay Sternberg return adapter_async_del_queue(nvmeq, nvme_admin_delete_cq, 284557dacad5SJay Sternberg nvme_del_cq_work_handler); 284657dacad5SJay Sternberg } 284757dacad5SJay Sternberg 284857dacad5SJay Sternberg static void nvme_del_sq_work_handler(struct kthread_work *work) 284957dacad5SJay Sternberg { 285057dacad5SJay Sternberg struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 285157dacad5SJay Sternberg cmdinfo.work); 285257dacad5SJay Sternberg int status = nvmeq->cmdinfo.status; 285357dacad5SJay Sternberg 285457dacad5SJay Sternberg if (!status) 285557dacad5SJay Sternberg status = nvme_delete_cq(nvmeq); 285657dacad5SJay Sternberg if (status) 285757dacad5SJay Sternberg nvme_del_queue_end(nvmeq); 285857dacad5SJay Sternberg } 285957dacad5SJay Sternberg 286057dacad5SJay Sternberg static int nvme_delete_sq(struct nvme_queue *nvmeq) 286157dacad5SJay Sternberg { 286257dacad5SJay Sternberg return adapter_async_del_queue(nvmeq, nvme_admin_delete_sq, 286357dacad5SJay Sternberg nvme_del_sq_work_handler); 286457dacad5SJay Sternberg } 286557dacad5SJay Sternberg 286657dacad5SJay Sternberg static void nvme_del_queue_start(struct kthread_work *work) 286757dacad5SJay Sternberg { 286857dacad5SJay Sternberg struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 286957dacad5SJay Sternberg cmdinfo.work); 287057dacad5SJay Sternberg if (nvme_delete_sq(nvmeq)) 287157dacad5SJay Sternberg nvme_del_queue_end(nvmeq); 287257dacad5SJay Sternberg } 287357dacad5SJay Sternberg 287457dacad5SJay Sternberg static void nvme_disable_io_queues(struct nvme_dev *dev) 287557dacad5SJay Sternberg { 287657dacad5SJay Sternberg int i; 287757dacad5SJay Sternberg DEFINE_KTHREAD_WORKER_ONSTACK(worker); 287857dacad5SJay Sternberg struct nvme_delq_ctx dq; 287957dacad5SJay Sternberg struct task_struct *kworker_task = kthread_run(kthread_worker_fn, 288057dacad5SJay Sternberg &worker, "nvme%d", dev->instance); 288157dacad5SJay Sternberg 288257dacad5SJay Sternberg if (IS_ERR(kworker_task)) { 288357dacad5SJay Sternberg dev_err(dev->dev, 288457dacad5SJay Sternberg "Failed to create queue del task\n"); 288557dacad5SJay Sternberg for (i = dev->queue_count - 1; i > 0; i--) 288657dacad5SJay Sternberg nvme_disable_queue(dev, i); 288757dacad5SJay Sternberg return; 288857dacad5SJay Sternberg } 288957dacad5SJay Sternberg 289057dacad5SJay Sternberg dq.waiter = NULL; 289157dacad5SJay Sternberg atomic_set(&dq.refcount, 0); 289257dacad5SJay Sternberg dq.worker = &worker; 289357dacad5SJay Sternberg for (i = dev->queue_count - 1; i > 0; i--) { 289457dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 289557dacad5SJay Sternberg 289657dacad5SJay Sternberg if (nvme_suspend_queue(nvmeq)) 289757dacad5SJay Sternberg continue; 289857dacad5SJay Sternberg nvmeq->cmdinfo.ctx = nvme_get_dq(&dq); 289957dacad5SJay Sternberg nvmeq->cmdinfo.worker = dq.worker; 290057dacad5SJay Sternberg init_kthread_work(&nvmeq->cmdinfo.work, nvme_del_queue_start); 290157dacad5SJay Sternberg queue_kthread_work(dq.worker, &nvmeq->cmdinfo.work); 290257dacad5SJay Sternberg } 290357dacad5SJay Sternberg nvme_wait_dq(&dq, dev); 290457dacad5SJay Sternberg kthread_stop(kworker_task); 290557dacad5SJay Sternberg } 290657dacad5SJay Sternberg 290757dacad5SJay Sternberg /* 290857dacad5SJay Sternberg * Remove the node from the device list and check 290957dacad5SJay Sternberg * for whether or not we need to stop the nvme_thread. 291057dacad5SJay Sternberg */ 291157dacad5SJay Sternberg static void nvme_dev_list_remove(struct nvme_dev *dev) 291257dacad5SJay Sternberg { 291357dacad5SJay Sternberg struct task_struct *tmp = NULL; 291457dacad5SJay Sternberg 291557dacad5SJay Sternberg spin_lock(&dev_list_lock); 291657dacad5SJay Sternberg list_del_init(&dev->node); 291757dacad5SJay Sternberg if (list_empty(&dev_list) && !IS_ERR_OR_NULL(nvme_thread)) { 291857dacad5SJay Sternberg tmp = nvme_thread; 291957dacad5SJay Sternberg nvme_thread = NULL; 292057dacad5SJay Sternberg } 292157dacad5SJay Sternberg spin_unlock(&dev_list_lock); 292257dacad5SJay Sternberg 292357dacad5SJay Sternberg if (tmp) 292457dacad5SJay Sternberg kthread_stop(tmp); 292557dacad5SJay Sternberg } 292657dacad5SJay Sternberg 292757dacad5SJay Sternberg static void nvme_freeze_queues(struct nvme_dev *dev) 292857dacad5SJay Sternberg { 292957dacad5SJay Sternberg struct nvme_ns *ns; 293057dacad5SJay Sternberg 293157dacad5SJay Sternberg list_for_each_entry(ns, &dev->namespaces, list) { 293257dacad5SJay Sternberg blk_mq_freeze_queue_start(ns->queue); 293357dacad5SJay Sternberg 293457dacad5SJay Sternberg spin_lock_irq(ns->queue->queue_lock); 293557dacad5SJay Sternberg queue_flag_set(QUEUE_FLAG_STOPPED, ns->queue); 293657dacad5SJay Sternberg spin_unlock_irq(ns->queue->queue_lock); 293757dacad5SJay Sternberg 293857dacad5SJay Sternberg blk_mq_cancel_requeue_work(ns->queue); 293957dacad5SJay Sternberg blk_mq_stop_hw_queues(ns->queue); 294057dacad5SJay Sternberg } 294157dacad5SJay Sternberg } 294257dacad5SJay Sternberg 294357dacad5SJay Sternberg static void nvme_unfreeze_queues(struct nvme_dev *dev) 294457dacad5SJay Sternberg { 294557dacad5SJay Sternberg struct nvme_ns *ns; 294657dacad5SJay Sternberg 294757dacad5SJay Sternberg list_for_each_entry(ns, &dev->namespaces, list) { 294857dacad5SJay Sternberg queue_flag_clear_unlocked(QUEUE_FLAG_STOPPED, ns->queue); 294957dacad5SJay Sternberg blk_mq_unfreeze_queue(ns->queue); 295057dacad5SJay Sternberg blk_mq_start_stopped_hw_queues(ns->queue, true); 295157dacad5SJay Sternberg blk_mq_kick_requeue_list(ns->queue); 295257dacad5SJay Sternberg } 295357dacad5SJay Sternberg } 295457dacad5SJay Sternberg 295557dacad5SJay Sternberg static void nvme_dev_shutdown(struct nvme_dev *dev) 295657dacad5SJay Sternberg { 295757dacad5SJay Sternberg int i; 295857dacad5SJay Sternberg u32 csts = -1; 295957dacad5SJay Sternberg 296057dacad5SJay Sternberg nvme_dev_list_remove(dev); 296157dacad5SJay Sternberg 296257dacad5SJay Sternberg if (dev->bar) { 296357dacad5SJay Sternberg nvme_freeze_queues(dev); 296457dacad5SJay Sternberg csts = readl(&dev->bar->csts); 296557dacad5SJay Sternberg } 296657dacad5SJay Sternberg if (csts & NVME_CSTS_CFS || !(csts & NVME_CSTS_RDY)) { 296757dacad5SJay Sternberg for (i = dev->queue_count - 1; i >= 0; i--) { 296857dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 296957dacad5SJay Sternberg nvme_suspend_queue(nvmeq); 297057dacad5SJay Sternberg } 297157dacad5SJay Sternberg } else { 297257dacad5SJay Sternberg nvme_disable_io_queues(dev); 297357dacad5SJay Sternberg nvme_shutdown_ctrl(dev); 297457dacad5SJay Sternberg nvme_disable_queue(dev, 0); 297557dacad5SJay Sternberg } 297657dacad5SJay Sternberg nvme_dev_unmap(dev); 297757dacad5SJay Sternberg 297857dacad5SJay Sternberg for (i = dev->queue_count - 1; i >= 0; i--) 297957dacad5SJay Sternberg nvme_clear_queue(dev->queues[i]); 298057dacad5SJay Sternberg } 298157dacad5SJay Sternberg 298257dacad5SJay Sternberg static void nvme_dev_remove(struct nvme_dev *dev) 298357dacad5SJay Sternberg { 298457dacad5SJay Sternberg struct nvme_ns *ns, *next; 298557dacad5SJay Sternberg 298657dacad5SJay Sternberg list_for_each_entry_safe(ns, next, &dev->namespaces, list) 298757dacad5SJay Sternberg nvme_ns_remove(ns); 298857dacad5SJay Sternberg } 298957dacad5SJay Sternberg 299057dacad5SJay Sternberg static int nvme_setup_prp_pools(struct nvme_dev *dev) 299157dacad5SJay Sternberg { 299257dacad5SJay Sternberg dev->prp_page_pool = dma_pool_create("prp list page", dev->dev, 299357dacad5SJay Sternberg PAGE_SIZE, PAGE_SIZE, 0); 299457dacad5SJay Sternberg if (!dev->prp_page_pool) 299557dacad5SJay Sternberg return -ENOMEM; 299657dacad5SJay Sternberg 299757dacad5SJay Sternberg /* Optimisation for I/Os between 4k and 128k */ 299857dacad5SJay Sternberg dev->prp_small_pool = dma_pool_create("prp list 256", dev->dev, 299957dacad5SJay Sternberg 256, 256, 0); 300057dacad5SJay Sternberg if (!dev->prp_small_pool) { 300157dacad5SJay Sternberg dma_pool_destroy(dev->prp_page_pool); 300257dacad5SJay Sternberg return -ENOMEM; 300357dacad5SJay Sternberg } 300457dacad5SJay Sternberg return 0; 300557dacad5SJay Sternberg } 300657dacad5SJay Sternberg 300757dacad5SJay Sternberg static void nvme_release_prp_pools(struct nvme_dev *dev) 300857dacad5SJay Sternberg { 300957dacad5SJay Sternberg dma_pool_destroy(dev->prp_page_pool); 301057dacad5SJay Sternberg dma_pool_destroy(dev->prp_small_pool); 301157dacad5SJay Sternberg } 301257dacad5SJay Sternberg 301357dacad5SJay Sternberg static DEFINE_IDA(nvme_instance_ida); 301457dacad5SJay Sternberg 301557dacad5SJay Sternberg static int nvme_set_instance(struct nvme_dev *dev) 301657dacad5SJay Sternberg { 301757dacad5SJay Sternberg int instance, error; 301857dacad5SJay Sternberg 301957dacad5SJay Sternberg do { 302057dacad5SJay Sternberg if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) 302157dacad5SJay Sternberg return -ENODEV; 302257dacad5SJay Sternberg 302357dacad5SJay Sternberg spin_lock(&dev_list_lock); 302457dacad5SJay Sternberg error = ida_get_new(&nvme_instance_ida, &instance); 302557dacad5SJay Sternberg spin_unlock(&dev_list_lock); 302657dacad5SJay Sternberg } while (error == -EAGAIN); 302757dacad5SJay Sternberg 302857dacad5SJay Sternberg if (error) 302957dacad5SJay Sternberg return -ENODEV; 303057dacad5SJay Sternberg 303157dacad5SJay Sternberg dev->instance = instance; 303257dacad5SJay Sternberg return 0; 303357dacad5SJay Sternberg } 303457dacad5SJay Sternberg 303557dacad5SJay Sternberg static void nvme_release_instance(struct nvme_dev *dev) 303657dacad5SJay Sternberg { 303757dacad5SJay Sternberg spin_lock(&dev_list_lock); 303857dacad5SJay Sternberg ida_remove(&nvme_instance_ida, dev->instance); 303957dacad5SJay Sternberg spin_unlock(&dev_list_lock); 304057dacad5SJay Sternberg } 304157dacad5SJay Sternberg 304257dacad5SJay Sternberg static void nvme_free_dev(struct kref *kref) 304357dacad5SJay Sternberg { 304457dacad5SJay Sternberg struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref); 304557dacad5SJay Sternberg 304657dacad5SJay Sternberg put_device(dev->dev); 304757dacad5SJay Sternberg put_device(dev->device); 304857dacad5SJay Sternberg nvme_release_instance(dev); 304957dacad5SJay Sternberg if (dev->tagset.tags) 305057dacad5SJay Sternberg blk_mq_free_tag_set(&dev->tagset); 305157dacad5SJay Sternberg if (dev->admin_q) 305257dacad5SJay Sternberg blk_put_queue(dev->admin_q); 305357dacad5SJay Sternberg kfree(dev->queues); 305457dacad5SJay Sternberg kfree(dev->entry); 305557dacad5SJay Sternberg kfree(dev); 305657dacad5SJay Sternberg } 305757dacad5SJay Sternberg 305857dacad5SJay Sternberg static int nvme_dev_open(struct inode *inode, struct file *f) 305957dacad5SJay Sternberg { 306057dacad5SJay Sternberg struct nvme_dev *dev; 306157dacad5SJay Sternberg int instance = iminor(inode); 306257dacad5SJay Sternberg int ret = -ENODEV; 306357dacad5SJay Sternberg 306457dacad5SJay Sternberg spin_lock(&dev_list_lock); 306557dacad5SJay Sternberg list_for_each_entry(dev, &dev_list, node) { 306657dacad5SJay Sternberg if (dev->instance == instance) { 306757dacad5SJay Sternberg if (!dev->admin_q) { 306857dacad5SJay Sternberg ret = -EWOULDBLOCK; 306957dacad5SJay Sternberg break; 307057dacad5SJay Sternberg } 307157dacad5SJay Sternberg if (!kref_get_unless_zero(&dev->kref)) 307257dacad5SJay Sternberg break; 307357dacad5SJay Sternberg f->private_data = dev; 307457dacad5SJay Sternberg ret = 0; 307557dacad5SJay Sternberg break; 307657dacad5SJay Sternberg } 307757dacad5SJay Sternberg } 307857dacad5SJay Sternberg spin_unlock(&dev_list_lock); 307957dacad5SJay Sternberg 308057dacad5SJay Sternberg return ret; 308157dacad5SJay Sternberg } 308257dacad5SJay Sternberg 308357dacad5SJay Sternberg static int nvme_dev_release(struct inode *inode, struct file *f) 308457dacad5SJay Sternberg { 308557dacad5SJay Sternberg struct nvme_dev *dev = f->private_data; 308657dacad5SJay Sternberg kref_put(&dev->kref, nvme_free_dev); 308757dacad5SJay Sternberg return 0; 308857dacad5SJay Sternberg } 308957dacad5SJay Sternberg 309057dacad5SJay Sternberg static long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg) 309157dacad5SJay Sternberg { 309257dacad5SJay Sternberg struct nvme_dev *dev = f->private_data; 309357dacad5SJay Sternberg struct nvme_ns *ns; 309457dacad5SJay Sternberg 309557dacad5SJay Sternberg switch (cmd) { 309657dacad5SJay Sternberg case NVME_IOCTL_ADMIN_CMD: 309757dacad5SJay Sternberg return nvme_user_cmd(dev, NULL, (void __user *)arg); 309857dacad5SJay Sternberg case NVME_IOCTL_IO_CMD: 309957dacad5SJay Sternberg if (list_empty(&dev->namespaces)) 310057dacad5SJay Sternberg return -ENOTTY; 310157dacad5SJay Sternberg ns = list_first_entry(&dev->namespaces, struct nvme_ns, list); 310257dacad5SJay Sternberg return nvme_user_cmd(dev, ns, (void __user *)arg); 310357dacad5SJay Sternberg case NVME_IOCTL_RESET: 310457dacad5SJay Sternberg dev_warn(dev->dev, "resetting controller\n"); 310557dacad5SJay Sternberg return nvme_reset(dev); 310657dacad5SJay Sternberg case NVME_IOCTL_SUBSYS_RESET: 310757dacad5SJay Sternberg return nvme_subsys_reset(dev); 310857dacad5SJay Sternberg default: 310957dacad5SJay Sternberg return -ENOTTY; 311057dacad5SJay Sternberg } 311157dacad5SJay Sternberg } 311257dacad5SJay Sternberg 311357dacad5SJay Sternberg static const struct file_operations nvme_dev_fops = { 311457dacad5SJay Sternberg .owner = THIS_MODULE, 311557dacad5SJay Sternberg .open = nvme_dev_open, 311657dacad5SJay Sternberg .release = nvme_dev_release, 311757dacad5SJay Sternberg .unlocked_ioctl = nvme_dev_ioctl, 311857dacad5SJay Sternberg .compat_ioctl = nvme_dev_ioctl, 311957dacad5SJay Sternberg }; 312057dacad5SJay Sternberg 312157dacad5SJay Sternberg static void nvme_probe_work(struct work_struct *work) 312257dacad5SJay Sternberg { 312357dacad5SJay Sternberg struct nvme_dev *dev = container_of(work, struct nvme_dev, probe_work); 312457dacad5SJay Sternberg bool start_thread = false; 312557dacad5SJay Sternberg int result; 312657dacad5SJay Sternberg 312757dacad5SJay Sternberg result = nvme_dev_map(dev); 312857dacad5SJay Sternberg if (result) 312957dacad5SJay Sternberg goto out; 313057dacad5SJay Sternberg 313157dacad5SJay Sternberg result = nvme_configure_admin_queue(dev); 313257dacad5SJay Sternberg if (result) 313357dacad5SJay Sternberg goto unmap; 313457dacad5SJay Sternberg 313557dacad5SJay Sternberg spin_lock(&dev_list_lock); 313657dacad5SJay Sternberg if (list_empty(&dev_list) && IS_ERR_OR_NULL(nvme_thread)) { 313757dacad5SJay Sternberg start_thread = true; 313857dacad5SJay Sternberg nvme_thread = NULL; 313957dacad5SJay Sternberg } 314057dacad5SJay Sternberg list_add(&dev->node, &dev_list); 314157dacad5SJay Sternberg spin_unlock(&dev_list_lock); 314257dacad5SJay Sternberg 314357dacad5SJay Sternberg if (start_thread) { 314457dacad5SJay Sternberg nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 314557dacad5SJay Sternberg wake_up_all(&nvme_kthread_wait); 314657dacad5SJay Sternberg } else 314757dacad5SJay Sternberg wait_event_killable(nvme_kthread_wait, nvme_thread); 314857dacad5SJay Sternberg 314957dacad5SJay Sternberg if (IS_ERR_OR_NULL(nvme_thread)) { 315057dacad5SJay Sternberg result = nvme_thread ? PTR_ERR(nvme_thread) : -EINTR; 315157dacad5SJay Sternberg goto disable; 315257dacad5SJay Sternberg } 315357dacad5SJay Sternberg 315457dacad5SJay Sternberg nvme_init_queue(dev->queues[0], 0); 315557dacad5SJay Sternberg result = nvme_alloc_admin_tags(dev); 315657dacad5SJay Sternberg if (result) 315757dacad5SJay Sternberg goto disable; 315857dacad5SJay Sternberg 315957dacad5SJay Sternberg result = nvme_setup_io_queues(dev); 316057dacad5SJay Sternberg if (result) 316157dacad5SJay Sternberg goto free_tags; 316257dacad5SJay Sternberg 316357dacad5SJay Sternberg dev->event_limit = 1; 316457dacad5SJay Sternberg 316557dacad5SJay Sternberg /* 316657dacad5SJay Sternberg * Keep the controller around but remove all namespaces if we don't have 316757dacad5SJay Sternberg * any working I/O queue. 316857dacad5SJay Sternberg */ 316957dacad5SJay Sternberg if (dev->online_queues < 2) { 317057dacad5SJay Sternberg dev_warn(dev->dev, "IO queues not created\n"); 317157dacad5SJay Sternberg nvme_dev_remove(dev); 317257dacad5SJay Sternberg } else { 317357dacad5SJay Sternberg nvme_unfreeze_queues(dev); 317457dacad5SJay Sternberg nvme_dev_add(dev); 317557dacad5SJay Sternberg } 317657dacad5SJay Sternberg 317757dacad5SJay Sternberg return; 317857dacad5SJay Sternberg 317957dacad5SJay Sternberg free_tags: 318057dacad5SJay Sternberg nvme_dev_remove_admin(dev); 318157dacad5SJay Sternberg blk_put_queue(dev->admin_q); 318257dacad5SJay Sternberg dev->admin_q = NULL; 318357dacad5SJay Sternberg dev->queues[0]->tags = NULL; 318457dacad5SJay Sternberg disable: 318557dacad5SJay Sternberg nvme_disable_queue(dev, 0); 318657dacad5SJay Sternberg nvme_dev_list_remove(dev); 318757dacad5SJay Sternberg unmap: 318857dacad5SJay Sternberg nvme_dev_unmap(dev); 318957dacad5SJay Sternberg out: 319057dacad5SJay Sternberg if (!work_busy(&dev->reset_work)) 319157dacad5SJay Sternberg nvme_dead_ctrl(dev); 319257dacad5SJay Sternberg } 319357dacad5SJay Sternberg 319457dacad5SJay Sternberg static int nvme_remove_dead_ctrl(void *arg) 319557dacad5SJay Sternberg { 319657dacad5SJay Sternberg struct nvme_dev *dev = (struct nvme_dev *)arg; 319757dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 319857dacad5SJay Sternberg 319957dacad5SJay Sternberg if (pci_get_drvdata(pdev)) 320057dacad5SJay Sternberg pci_stop_and_remove_bus_device_locked(pdev); 320157dacad5SJay Sternberg kref_put(&dev->kref, nvme_free_dev); 320257dacad5SJay Sternberg return 0; 320357dacad5SJay Sternberg } 320457dacad5SJay Sternberg 320557dacad5SJay Sternberg static void nvme_dead_ctrl(struct nvme_dev *dev) 320657dacad5SJay Sternberg { 320757dacad5SJay Sternberg dev_warn(dev->dev, "Device failed to resume\n"); 320857dacad5SJay Sternberg kref_get(&dev->kref); 320957dacad5SJay Sternberg if (IS_ERR(kthread_run(nvme_remove_dead_ctrl, dev, "nvme%d", 321057dacad5SJay Sternberg dev->instance))) { 321157dacad5SJay Sternberg dev_err(dev->dev, 321257dacad5SJay Sternberg "Failed to start controller remove task\n"); 321357dacad5SJay Sternberg kref_put(&dev->kref, nvme_free_dev); 321457dacad5SJay Sternberg } 321557dacad5SJay Sternberg } 321657dacad5SJay Sternberg 321757dacad5SJay Sternberg static void nvme_reset_work(struct work_struct *ws) 321857dacad5SJay Sternberg { 321957dacad5SJay Sternberg struct nvme_dev *dev = container_of(ws, struct nvme_dev, reset_work); 322057dacad5SJay Sternberg bool in_probe = work_busy(&dev->probe_work); 322157dacad5SJay Sternberg 322257dacad5SJay Sternberg nvme_dev_shutdown(dev); 322357dacad5SJay Sternberg 322457dacad5SJay Sternberg /* Synchronize with device probe so that work will see failure status 322557dacad5SJay Sternberg * and exit gracefully without trying to schedule another reset */ 322657dacad5SJay Sternberg flush_work(&dev->probe_work); 322757dacad5SJay Sternberg 322857dacad5SJay Sternberg /* Fail this device if reset occured during probe to avoid 322957dacad5SJay Sternberg * infinite initialization loops. */ 323057dacad5SJay Sternberg if (in_probe) { 323157dacad5SJay Sternberg nvme_dead_ctrl(dev); 323257dacad5SJay Sternberg return; 323357dacad5SJay Sternberg } 323457dacad5SJay Sternberg /* Schedule device resume asynchronously so the reset work is available 323557dacad5SJay Sternberg * to cleanup errors that may occur during reinitialization */ 323657dacad5SJay Sternberg schedule_work(&dev->probe_work); 323757dacad5SJay Sternberg } 323857dacad5SJay Sternberg 323957dacad5SJay Sternberg static int __nvme_reset(struct nvme_dev *dev) 324057dacad5SJay Sternberg { 324157dacad5SJay Sternberg if (work_pending(&dev->reset_work)) 324257dacad5SJay Sternberg return -EBUSY; 324357dacad5SJay Sternberg list_del_init(&dev->node); 324457dacad5SJay Sternberg queue_work(nvme_workq, &dev->reset_work); 324557dacad5SJay Sternberg return 0; 324657dacad5SJay Sternberg } 324757dacad5SJay Sternberg 324857dacad5SJay Sternberg static int nvme_reset(struct nvme_dev *dev) 324957dacad5SJay Sternberg { 325057dacad5SJay Sternberg int ret; 325157dacad5SJay Sternberg 325257dacad5SJay Sternberg if (!dev->admin_q || blk_queue_dying(dev->admin_q)) 325357dacad5SJay Sternberg return -ENODEV; 325457dacad5SJay Sternberg 325557dacad5SJay Sternberg spin_lock(&dev_list_lock); 325657dacad5SJay Sternberg ret = __nvme_reset(dev); 325757dacad5SJay Sternberg spin_unlock(&dev_list_lock); 325857dacad5SJay Sternberg 325957dacad5SJay Sternberg if (!ret) { 326057dacad5SJay Sternberg flush_work(&dev->reset_work); 326157dacad5SJay Sternberg flush_work(&dev->probe_work); 326257dacad5SJay Sternberg return 0; 326357dacad5SJay Sternberg } 326457dacad5SJay Sternberg 326557dacad5SJay Sternberg return ret; 326657dacad5SJay Sternberg } 326757dacad5SJay Sternberg 326857dacad5SJay Sternberg static ssize_t nvme_sysfs_reset(struct device *dev, 326957dacad5SJay Sternberg struct device_attribute *attr, const char *buf, 327057dacad5SJay Sternberg size_t count) 327157dacad5SJay Sternberg { 327257dacad5SJay Sternberg struct nvme_dev *ndev = dev_get_drvdata(dev); 327357dacad5SJay Sternberg int ret; 327457dacad5SJay Sternberg 327557dacad5SJay Sternberg ret = nvme_reset(ndev); 327657dacad5SJay Sternberg if (ret < 0) 327757dacad5SJay Sternberg return ret; 327857dacad5SJay Sternberg 327957dacad5SJay Sternberg return count; 328057dacad5SJay Sternberg } 328157dacad5SJay Sternberg static DEVICE_ATTR(reset_controller, S_IWUSR, NULL, nvme_sysfs_reset); 328257dacad5SJay Sternberg 328357dacad5SJay Sternberg static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) 328457dacad5SJay Sternberg { 328557dacad5SJay Sternberg int node, result = -ENOMEM; 328657dacad5SJay Sternberg struct nvme_dev *dev; 328757dacad5SJay Sternberg 328857dacad5SJay Sternberg node = dev_to_node(&pdev->dev); 328957dacad5SJay Sternberg if (node == NUMA_NO_NODE) 329057dacad5SJay Sternberg set_dev_node(&pdev->dev, 0); 329157dacad5SJay Sternberg 329257dacad5SJay Sternberg dev = kzalloc_node(sizeof(*dev), GFP_KERNEL, node); 329357dacad5SJay Sternberg if (!dev) 329457dacad5SJay Sternberg return -ENOMEM; 329557dacad5SJay Sternberg dev->entry = kzalloc_node(num_possible_cpus() * sizeof(*dev->entry), 329657dacad5SJay Sternberg GFP_KERNEL, node); 329757dacad5SJay Sternberg if (!dev->entry) 329857dacad5SJay Sternberg goto free; 329957dacad5SJay Sternberg dev->queues = kzalloc_node((num_possible_cpus() + 1) * sizeof(void *), 330057dacad5SJay Sternberg GFP_KERNEL, node); 330157dacad5SJay Sternberg if (!dev->queues) 330257dacad5SJay Sternberg goto free; 330357dacad5SJay Sternberg 330457dacad5SJay Sternberg INIT_LIST_HEAD(&dev->namespaces); 330557dacad5SJay Sternberg INIT_WORK(&dev->reset_work, nvme_reset_work); 330657dacad5SJay Sternberg dev->dev = get_device(&pdev->dev); 330757dacad5SJay Sternberg pci_set_drvdata(pdev, dev); 330857dacad5SJay Sternberg result = nvme_set_instance(dev); 330957dacad5SJay Sternberg if (result) 331057dacad5SJay Sternberg goto put_pci; 331157dacad5SJay Sternberg 331257dacad5SJay Sternberg result = nvme_setup_prp_pools(dev); 331357dacad5SJay Sternberg if (result) 331457dacad5SJay Sternberg goto release; 331557dacad5SJay Sternberg 331657dacad5SJay Sternberg kref_init(&dev->kref); 331757dacad5SJay Sternberg dev->device = device_create(nvme_class, &pdev->dev, 331857dacad5SJay Sternberg MKDEV(nvme_char_major, dev->instance), 331957dacad5SJay Sternberg dev, "nvme%d", dev->instance); 332057dacad5SJay Sternberg if (IS_ERR(dev->device)) { 332157dacad5SJay Sternberg result = PTR_ERR(dev->device); 332257dacad5SJay Sternberg goto release_pools; 332357dacad5SJay Sternberg } 332457dacad5SJay Sternberg get_device(dev->device); 332557dacad5SJay Sternberg dev_set_drvdata(dev->device, dev); 332657dacad5SJay Sternberg 332757dacad5SJay Sternberg result = device_create_file(dev->device, &dev_attr_reset_controller); 332857dacad5SJay Sternberg if (result) 332957dacad5SJay Sternberg goto put_dev; 333057dacad5SJay Sternberg 333157dacad5SJay Sternberg INIT_LIST_HEAD(&dev->node); 333257dacad5SJay Sternberg INIT_WORK(&dev->scan_work, nvme_dev_scan); 333357dacad5SJay Sternberg INIT_WORK(&dev->probe_work, nvme_probe_work); 333457dacad5SJay Sternberg schedule_work(&dev->probe_work); 333557dacad5SJay Sternberg return 0; 333657dacad5SJay Sternberg 333757dacad5SJay Sternberg put_dev: 333857dacad5SJay Sternberg device_destroy(nvme_class, MKDEV(nvme_char_major, dev->instance)); 333957dacad5SJay Sternberg put_device(dev->device); 334057dacad5SJay Sternberg release_pools: 334157dacad5SJay Sternberg nvme_release_prp_pools(dev); 334257dacad5SJay Sternberg release: 334357dacad5SJay Sternberg nvme_release_instance(dev); 334457dacad5SJay Sternberg put_pci: 334557dacad5SJay Sternberg put_device(dev->dev); 334657dacad5SJay Sternberg free: 334757dacad5SJay Sternberg kfree(dev->queues); 334857dacad5SJay Sternberg kfree(dev->entry); 334957dacad5SJay Sternberg kfree(dev); 335057dacad5SJay Sternberg return result; 335157dacad5SJay Sternberg } 335257dacad5SJay Sternberg 335357dacad5SJay Sternberg static void nvme_reset_notify(struct pci_dev *pdev, bool prepare) 335457dacad5SJay Sternberg { 335557dacad5SJay Sternberg struct nvme_dev *dev = pci_get_drvdata(pdev); 335657dacad5SJay Sternberg 335757dacad5SJay Sternberg if (prepare) 335857dacad5SJay Sternberg nvme_dev_shutdown(dev); 335957dacad5SJay Sternberg else 336057dacad5SJay Sternberg schedule_work(&dev->probe_work); 336157dacad5SJay Sternberg } 336257dacad5SJay Sternberg 336357dacad5SJay Sternberg static void nvme_shutdown(struct pci_dev *pdev) 336457dacad5SJay Sternberg { 336557dacad5SJay Sternberg struct nvme_dev *dev = pci_get_drvdata(pdev); 336657dacad5SJay Sternberg nvme_dev_shutdown(dev); 336757dacad5SJay Sternberg } 336857dacad5SJay Sternberg 336957dacad5SJay Sternberg static void nvme_remove(struct pci_dev *pdev) 337057dacad5SJay Sternberg { 337157dacad5SJay Sternberg struct nvme_dev *dev = pci_get_drvdata(pdev); 337257dacad5SJay Sternberg 337357dacad5SJay Sternberg spin_lock(&dev_list_lock); 337457dacad5SJay Sternberg list_del_init(&dev->node); 337557dacad5SJay Sternberg spin_unlock(&dev_list_lock); 337657dacad5SJay Sternberg 337757dacad5SJay Sternberg pci_set_drvdata(pdev, NULL); 337857dacad5SJay Sternberg flush_work(&dev->probe_work); 337957dacad5SJay Sternberg flush_work(&dev->reset_work); 338057dacad5SJay Sternberg flush_work(&dev->scan_work); 338157dacad5SJay Sternberg device_remove_file(dev->device, &dev_attr_reset_controller); 338257dacad5SJay Sternberg nvme_dev_remove(dev); 338357dacad5SJay Sternberg nvme_dev_shutdown(dev); 338457dacad5SJay Sternberg nvme_dev_remove_admin(dev); 338557dacad5SJay Sternberg device_destroy(nvme_class, MKDEV(nvme_char_major, dev->instance)); 338657dacad5SJay Sternberg nvme_free_queues(dev, 0); 338757dacad5SJay Sternberg nvme_release_cmb(dev); 338857dacad5SJay Sternberg nvme_release_prp_pools(dev); 338957dacad5SJay Sternberg kref_put(&dev->kref, nvme_free_dev); 339057dacad5SJay Sternberg } 339157dacad5SJay Sternberg 339257dacad5SJay Sternberg /* These functions are yet to be implemented */ 339357dacad5SJay Sternberg #define nvme_error_detected NULL 339457dacad5SJay Sternberg #define nvme_dump_registers NULL 339557dacad5SJay Sternberg #define nvme_link_reset NULL 339657dacad5SJay Sternberg #define nvme_slot_reset NULL 339757dacad5SJay Sternberg #define nvme_error_resume NULL 339857dacad5SJay Sternberg 339957dacad5SJay Sternberg #ifdef CONFIG_PM_SLEEP 340057dacad5SJay Sternberg static int nvme_suspend(struct device *dev) 340157dacad5SJay Sternberg { 340257dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev); 340357dacad5SJay Sternberg struct nvme_dev *ndev = pci_get_drvdata(pdev); 340457dacad5SJay Sternberg 340557dacad5SJay Sternberg nvme_dev_shutdown(ndev); 340657dacad5SJay Sternberg return 0; 340757dacad5SJay Sternberg } 340857dacad5SJay Sternberg 340957dacad5SJay Sternberg static int nvme_resume(struct device *dev) 341057dacad5SJay Sternberg { 341157dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev); 341257dacad5SJay Sternberg struct nvme_dev *ndev = pci_get_drvdata(pdev); 341357dacad5SJay Sternberg 341457dacad5SJay Sternberg schedule_work(&ndev->probe_work); 341557dacad5SJay Sternberg return 0; 341657dacad5SJay Sternberg } 341757dacad5SJay Sternberg #endif 341857dacad5SJay Sternberg 341957dacad5SJay Sternberg static SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume); 342057dacad5SJay Sternberg 342157dacad5SJay Sternberg static const struct pci_error_handlers nvme_err_handler = { 342257dacad5SJay Sternberg .error_detected = nvme_error_detected, 342357dacad5SJay Sternberg .mmio_enabled = nvme_dump_registers, 342457dacad5SJay Sternberg .link_reset = nvme_link_reset, 342557dacad5SJay Sternberg .slot_reset = nvme_slot_reset, 342657dacad5SJay Sternberg .resume = nvme_error_resume, 342757dacad5SJay Sternberg .reset_notify = nvme_reset_notify, 342857dacad5SJay Sternberg }; 342957dacad5SJay Sternberg 343057dacad5SJay Sternberg /* Move to pci_ids.h later */ 343157dacad5SJay Sternberg #define PCI_CLASS_STORAGE_EXPRESS 0x010802 343257dacad5SJay Sternberg 343357dacad5SJay Sternberg static const struct pci_device_id nvme_id_table[] = { 343457dacad5SJay Sternberg { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 3435c74dc780SStephan Günther { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2001) }, 343657dacad5SJay Sternberg { 0, } 343757dacad5SJay Sternberg }; 343857dacad5SJay Sternberg MODULE_DEVICE_TABLE(pci, nvme_id_table); 343957dacad5SJay Sternberg 344057dacad5SJay Sternberg static struct pci_driver nvme_driver = { 344157dacad5SJay Sternberg .name = "nvme", 344257dacad5SJay Sternberg .id_table = nvme_id_table, 344357dacad5SJay Sternberg .probe = nvme_probe, 344457dacad5SJay Sternberg .remove = nvme_remove, 344557dacad5SJay Sternberg .shutdown = nvme_shutdown, 344657dacad5SJay Sternberg .driver = { 344757dacad5SJay Sternberg .pm = &nvme_dev_pm_ops, 344857dacad5SJay Sternberg }, 344957dacad5SJay Sternberg .err_handler = &nvme_err_handler, 345057dacad5SJay Sternberg }; 345157dacad5SJay Sternberg 345257dacad5SJay Sternberg static int __init nvme_init(void) 345357dacad5SJay Sternberg { 345457dacad5SJay Sternberg int result; 345557dacad5SJay Sternberg 345657dacad5SJay Sternberg init_waitqueue_head(&nvme_kthread_wait); 345757dacad5SJay Sternberg 345857dacad5SJay Sternberg nvme_workq = create_singlethread_workqueue("nvme"); 345957dacad5SJay Sternberg if (!nvme_workq) 346057dacad5SJay Sternberg return -ENOMEM; 346157dacad5SJay Sternberg 346257dacad5SJay Sternberg result = register_blkdev(nvme_major, "nvme"); 346357dacad5SJay Sternberg if (result < 0) 346457dacad5SJay Sternberg goto kill_workq; 346557dacad5SJay Sternberg else if (result > 0) 346657dacad5SJay Sternberg nvme_major = result; 346757dacad5SJay Sternberg 346857dacad5SJay Sternberg result = __register_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme", 346957dacad5SJay Sternberg &nvme_dev_fops); 347057dacad5SJay Sternberg if (result < 0) 347157dacad5SJay Sternberg goto unregister_blkdev; 347257dacad5SJay Sternberg else if (result > 0) 347357dacad5SJay Sternberg nvme_char_major = result; 347457dacad5SJay Sternberg 347557dacad5SJay Sternberg nvme_class = class_create(THIS_MODULE, "nvme"); 347657dacad5SJay Sternberg if (IS_ERR(nvme_class)) { 347757dacad5SJay Sternberg result = PTR_ERR(nvme_class); 347857dacad5SJay Sternberg goto unregister_chrdev; 347957dacad5SJay Sternberg } 348057dacad5SJay Sternberg 348157dacad5SJay Sternberg result = pci_register_driver(&nvme_driver); 348257dacad5SJay Sternberg if (result) 348357dacad5SJay Sternberg goto destroy_class; 348457dacad5SJay Sternberg return 0; 348557dacad5SJay Sternberg 348657dacad5SJay Sternberg destroy_class: 348757dacad5SJay Sternberg class_destroy(nvme_class); 348857dacad5SJay Sternberg unregister_chrdev: 348957dacad5SJay Sternberg __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); 349057dacad5SJay Sternberg unregister_blkdev: 349157dacad5SJay Sternberg unregister_blkdev(nvme_major, "nvme"); 349257dacad5SJay Sternberg kill_workq: 349357dacad5SJay Sternberg destroy_workqueue(nvme_workq); 349457dacad5SJay Sternberg return result; 349557dacad5SJay Sternberg } 349657dacad5SJay Sternberg 349757dacad5SJay Sternberg static void __exit nvme_exit(void) 349857dacad5SJay Sternberg { 349957dacad5SJay Sternberg pci_unregister_driver(&nvme_driver); 350057dacad5SJay Sternberg unregister_blkdev(nvme_major, "nvme"); 350157dacad5SJay Sternberg destroy_workqueue(nvme_workq); 350257dacad5SJay Sternberg class_destroy(nvme_class); 350357dacad5SJay Sternberg __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); 350457dacad5SJay Sternberg BUG_ON(nvme_thread && !IS_ERR(nvme_thread)); 350557dacad5SJay Sternberg _nvme_check_size(); 350657dacad5SJay Sternberg } 350757dacad5SJay Sternberg 350857dacad5SJay Sternberg MODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 350957dacad5SJay Sternberg MODULE_LICENSE("GPL"); 351057dacad5SJay Sternberg MODULE_VERSION("1.0"); 351157dacad5SJay Sternberg module_init(nvme_init); 351257dacad5SJay Sternberg module_exit(nvme_exit); 3513