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/mm.h> 3257dacad5SJay Sternberg #include <linux/module.h> 3357dacad5SJay Sternberg #include <linux/moduleparam.h> 3477bf25eaSKeith Busch #include <linux/mutex.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> 429cf5c095SLinus Torvalds #include <linux/io-64-nonatomic-lo-hi.h> 431d277a63SKeith Busch #include <asm/unaligned.h> 4457dacad5SJay Sternberg 4557dacad5SJay Sternberg #include "nvme.h" 4657dacad5SJay Sternberg 4757dacad5SJay Sternberg #define NVME_Q_DEPTH 1024 4857dacad5SJay Sternberg #define NVME_AQ_DEPTH 256 4957dacad5SJay Sternberg #define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) 5057dacad5SJay Sternberg #define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) 5157dacad5SJay Sternberg 52adf68f21SChristoph Hellwig /* 53adf68f21SChristoph Hellwig * We handle AEN commands ourselves and don't even let the 54adf68f21SChristoph Hellwig * block layer know about them. 55adf68f21SChristoph Hellwig */ 56adf68f21SChristoph Hellwig #define NVME_NR_AEN_COMMANDS 1 57adf68f21SChristoph Hellwig #define NVME_AQ_BLKMQ_DEPTH (NVME_AQ_DEPTH - NVME_NR_AEN_COMMANDS) 58adf68f21SChristoph Hellwig 5921d34711SChristoph Hellwig unsigned char admin_timeout = 60; 6057dacad5SJay Sternberg module_param(admin_timeout, byte, 0644); 6157dacad5SJay Sternberg MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands"); 6257dacad5SJay Sternberg 6357dacad5SJay Sternberg unsigned char nvme_io_timeout = 30; 6457dacad5SJay Sternberg module_param_named(io_timeout, nvme_io_timeout, byte, 0644); 6557dacad5SJay Sternberg MODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O"); 6657dacad5SJay Sternberg 675fd4ce1bSChristoph Hellwig unsigned char shutdown_timeout = 5; 6857dacad5SJay Sternberg module_param(shutdown_timeout, byte, 0644); 6957dacad5SJay Sternberg MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown"); 7057dacad5SJay Sternberg 7157dacad5SJay Sternberg static int use_threaded_interrupts; 7257dacad5SJay Sternberg module_param(use_threaded_interrupts, int, 0); 7357dacad5SJay Sternberg 7457dacad5SJay Sternberg static bool use_cmb_sqes = true; 7557dacad5SJay Sternberg module_param(use_cmb_sqes, bool, 0644); 7657dacad5SJay Sternberg MODULE_PARM_DESC(use_cmb_sqes, "use controller's memory buffer for I/O SQes"); 7757dacad5SJay Sternberg 7857dacad5SJay Sternberg static LIST_HEAD(dev_list); 7957dacad5SJay Sternberg static struct task_struct *nvme_thread; 8057dacad5SJay Sternberg static struct workqueue_struct *nvme_workq; 8157dacad5SJay Sternberg static wait_queue_head_t nvme_kthread_wait; 8257dacad5SJay Sternberg 831c63dc66SChristoph Hellwig struct nvme_dev; 841c63dc66SChristoph Hellwig struct nvme_queue; 851c63dc66SChristoph Hellwig 8657dacad5SJay Sternberg static int nvme_reset(struct nvme_dev *dev); 87a0fa9647SJens Axboe static void nvme_process_cq(struct nvme_queue *nvmeq); 885c8809e6SChristoph Hellwig static void nvme_remove_dead_ctrl(struct nvme_dev *dev); 89e1569a16SKeith Busch static void nvme_dev_shutdown(struct nvme_dev *dev); 9057dacad5SJay Sternberg 9157dacad5SJay Sternberg struct async_cmd_info { 9257dacad5SJay Sternberg struct kthread_work work; 9357dacad5SJay Sternberg struct kthread_worker *worker; 9457dacad5SJay Sternberg int status; 9557dacad5SJay Sternberg void *ctx; 9657dacad5SJay Sternberg }; 9757dacad5SJay Sternberg 9857dacad5SJay Sternberg /* 991c63dc66SChristoph Hellwig * Represents an NVM Express device. Each nvme_dev is a PCI function. 1001c63dc66SChristoph Hellwig */ 1011c63dc66SChristoph Hellwig struct nvme_dev { 1021c63dc66SChristoph Hellwig struct list_head node; 1031c63dc66SChristoph Hellwig struct nvme_queue **queues; 1041c63dc66SChristoph Hellwig struct blk_mq_tag_set tagset; 1051c63dc66SChristoph Hellwig struct blk_mq_tag_set admin_tagset; 1061c63dc66SChristoph Hellwig u32 __iomem *dbs; 1071c63dc66SChristoph Hellwig struct device *dev; 1081c63dc66SChristoph Hellwig struct dma_pool *prp_page_pool; 1091c63dc66SChristoph Hellwig struct dma_pool *prp_small_pool; 1101c63dc66SChristoph Hellwig unsigned queue_count; 1111c63dc66SChristoph Hellwig unsigned online_queues; 1121c63dc66SChristoph Hellwig unsigned max_qid; 1131c63dc66SChristoph Hellwig int q_depth; 1141c63dc66SChristoph Hellwig u32 db_stride; 1151c63dc66SChristoph Hellwig struct msix_entry *entry; 1161c63dc66SChristoph Hellwig void __iomem *bar; 1171c63dc66SChristoph Hellwig struct work_struct reset_work; 1181c63dc66SChristoph Hellwig struct work_struct scan_work; 1195c8809e6SChristoph Hellwig struct work_struct remove_work; 12077bf25eaSKeith Busch struct mutex shutdown_lock; 1211c63dc66SChristoph Hellwig bool subsystem; 1221c63dc66SChristoph Hellwig void __iomem *cmb; 1231c63dc66SChristoph Hellwig dma_addr_t cmb_dma_addr; 1241c63dc66SChristoph Hellwig u64 cmb_size; 1251c63dc66SChristoph Hellwig u32 cmbsz; 126fd634f41SChristoph Hellwig unsigned long flags; 127fd634f41SChristoph Hellwig #define NVME_CTRL_RESETTING 0 1281c63dc66SChristoph Hellwig 1291c63dc66SChristoph Hellwig struct nvme_ctrl ctrl; 1301c63dc66SChristoph Hellwig }; 1311c63dc66SChristoph Hellwig 1321c63dc66SChristoph Hellwig static inline struct nvme_dev *to_nvme_dev(struct nvme_ctrl *ctrl) 1331c63dc66SChristoph Hellwig { 1341c63dc66SChristoph Hellwig return container_of(ctrl, struct nvme_dev, ctrl); 1351c63dc66SChristoph Hellwig } 1361c63dc66SChristoph Hellwig 1371c63dc66SChristoph Hellwig /* 13857dacad5SJay Sternberg * An NVM Express queue. Each device has at least two (one for admin 13957dacad5SJay Sternberg * commands and one for I/O commands). 14057dacad5SJay Sternberg */ 14157dacad5SJay Sternberg struct nvme_queue { 14257dacad5SJay Sternberg struct device *q_dmadev; 14357dacad5SJay Sternberg struct nvme_dev *dev; 14457dacad5SJay Sternberg char irqname[24]; /* nvme4294967295-65535\0 */ 14557dacad5SJay Sternberg spinlock_t q_lock; 14657dacad5SJay Sternberg struct nvme_command *sq_cmds; 14757dacad5SJay Sternberg struct nvme_command __iomem *sq_cmds_io; 14857dacad5SJay Sternberg volatile struct nvme_completion *cqes; 14957dacad5SJay Sternberg struct blk_mq_tags **tags; 15057dacad5SJay Sternberg dma_addr_t sq_dma_addr; 15157dacad5SJay Sternberg dma_addr_t cq_dma_addr; 15257dacad5SJay Sternberg u32 __iomem *q_db; 15357dacad5SJay Sternberg u16 q_depth; 15457dacad5SJay Sternberg s16 cq_vector; 15557dacad5SJay Sternberg u16 sq_head; 15657dacad5SJay Sternberg u16 sq_tail; 15757dacad5SJay Sternberg u16 cq_head; 15857dacad5SJay Sternberg u16 qid; 15957dacad5SJay Sternberg u8 cq_phase; 16057dacad5SJay Sternberg u8 cqe_seen; 16157dacad5SJay Sternberg struct async_cmd_info cmdinfo; 16257dacad5SJay Sternberg }; 16357dacad5SJay Sternberg 16457dacad5SJay Sternberg /* 16571bd150cSChristoph Hellwig * The nvme_iod describes the data in an I/O, including the list of PRP 16671bd150cSChristoph Hellwig * entries. You can't see it in this data structure because C doesn't let 16771bd150cSChristoph Hellwig * me express that. Use nvme_alloc_iod to ensure there's enough space 16871bd150cSChristoph Hellwig * allocated to store the PRP list. 16971bd150cSChristoph Hellwig */ 17071bd150cSChristoph Hellwig struct nvme_iod { 17171bd150cSChristoph Hellwig unsigned long private; /* For the use of the submitter of the I/O */ 17271bd150cSChristoph Hellwig int npages; /* In the PRP list. 0 means small pool in use */ 17371bd150cSChristoph Hellwig int offset; /* Of PRP list */ 17471bd150cSChristoph Hellwig int nents; /* Used in scatterlist */ 17571bd150cSChristoph Hellwig int length; /* Of data, in bytes */ 17671bd150cSChristoph Hellwig dma_addr_t first_dma; 17771bd150cSChristoph Hellwig struct scatterlist meta_sg[1]; /* metadata requires single contiguous buffer */ 17871bd150cSChristoph Hellwig struct scatterlist sg[0]; 17971bd150cSChristoph Hellwig }; 18071bd150cSChristoph Hellwig 18171bd150cSChristoph Hellwig /* 18257dacad5SJay Sternberg * Check we didin't inadvertently grow the command struct 18357dacad5SJay Sternberg */ 18457dacad5SJay Sternberg static inline void _nvme_check_size(void) 18557dacad5SJay Sternberg { 18657dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); 18757dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); 18857dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); 18957dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); 19057dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_features) != 64); 19157dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); 19257dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); 19357dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_command) != 64); 19457dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); 19557dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); 19657dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); 19757dacad5SJay Sternberg BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); 19857dacad5SJay Sternberg } 19957dacad5SJay Sternberg 20057dacad5SJay Sternberg struct nvme_cmd_info { 20157dacad5SJay Sternberg int aborted; 20257dacad5SJay Sternberg struct nvme_queue *nvmeq; 203aae239e1SChristoph Hellwig struct nvme_iod *iod; 204aae239e1SChristoph Hellwig struct nvme_iod __iod; 20557dacad5SJay Sternberg }; 20657dacad5SJay Sternberg 20757dacad5SJay Sternberg /* 20857dacad5SJay Sternberg * Max size of iod being embedded in the request payload 20957dacad5SJay Sternberg */ 21057dacad5SJay Sternberg #define NVME_INT_PAGES 2 2115fd4ce1bSChristoph Hellwig #define NVME_INT_BYTES(dev) (NVME_INT_PAGES * (dev)->ctrl.page_size) 21257dacad5SJay Sternberg #define NVME_INT_MASK 0x01 21357dacad5SJay Sternberg 21457dacad5SJay Sternberg /* 21557dacad5SJay Sternberg * Will slightly overestimate the number of pages needed. This is OK 21657dacad5SJay Sternberg * as it only leads to a small amount of wasted memory for the lifetime of 21757dacad5SJay Sternberg * the I/O. 21857dacad5SJay Sternberg */ 21957dacad5SJay Sternberg static int nvme_npages(unsigned size, struct nvme_dev *dev) 22057dacad5SJay Sternberg { 2215fd4ce1bSChristoph Hellwig unsigned nprps = DIV_ROUND_UP(size + dev->ctrl.page_size, 2225fd4ce1bSChristoph Hellwig dev->ctrl.page_size); 22357dacad5SJay Sternberg return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); 22457dacad5SJay Sternberg } 22557dacad5SJay Sternberg 22657dacad5SJay Sternberg static unsigned int nvme_cmd_size(struct nvme_dev *dev) 22757dacad5SJay Sternberg { 22857dacad5SJay Sternberg unsigned int ret = sizeof(struct nvme_cmd_info); 22957dacad5SJay Sternberg 23057dacad5SJay Sternberg ret += sizeof(struct nvme_iod); 23157dacad5SJay Sternberg ret += sizeof(__le64 *) * nvme_npages(NVME_INT_BYTES(dev), dev); 23257dacad5SJay Sternberg ret += sizeof(struct scatterlist) * NVME_INT_PAGES; 23357dacad5SJay Sternberg 23457dacad5SJay Sternberg return ret; 23557dacad5SJay Sternberg } 23657dacad5SJay Sternberg 23757dacad5SJay Sternberg static int nvme_admin_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 23857dacad5SJay Sternberg unsigned int hctx_idx) 23957dacad5SJay Sternberg { 24057dacad5SJay Sternberg struct nvme_dev *dev = data; 24157dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[0]; 24257dacad5SJay Sternberg 24357dacad5SJay Sternberg WARN_ON(hctx_idx != 0); 24457dacad5SJay Sternberg WARN_ON(dev->admin_tagset.tags[0] != hctx->tags); 24557dacad5SJay Sternberg WARN_ON(nvmeq->tags); 24657dacad5SJay Sternberg 24757dacad5SJay Sternberg hctx->driver_data = nvmeq; 24857dacad5SJay Sternberg nvmeq->tags = &dev->admin_tagset.tags[0]; 24957dacad5SJay Sternberg return 0; 25057dacad5SJay Sternberg } 25157dacad5SJay Sternberg 25257dacad5SJay Sternberg static void nvme_admin_exit_hctx(struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx) 25357dacad5SJay Sternberg { 25457dacad5SJay Sternberg struct nvme_queue *nvmeq = hctx->driver_data; 25557dacad5SJay Sternberg 25657dacad5SJay Sternberg nvmeq->tags = NULL; 25757dacad5SJay Sternberg } 25857dacad5SJay Sternberg 25957dacad5SJay Sternberg static int nvme_admin_init_request(void *data, struct request *req, 26057dacad5SJay Sternberg unsigned int hctx_idx, unsigned int rq_idx, 26157dacad5SJay Sternberg unsigned int numa_node) 26257dacad5SJay Sternberg { 26357dacad5SJay Sternberg struct nvme_dev *dev = data; 26457dacad5SJay Sternberg struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); 26557dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[0]; 26657dacad5SJay Sternberg 26757dacad5SJay Sternberg BUG_ON(!nvmeq); 26857dacad5SJay Sternberg cmd->nvmeq = nvmeq; 26957dacad5SJay Sternberg return 0; 27057dacad5SJay Sternberg } 27157dacad5SJay Sternberg 27257dacad5SJay Sternberg static int nvme_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 27357dacad5SJay Sternberg unsigned int hctx_idx) 27457dacad5SJay Sternberg { 27557dacad5SJay Sternberg struct nvme_dev *dev = data; 27657dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; 27757dacad5SJay Sternberg 27857dacad5SJay Sternberg if (!nvmeq->tags) 27957dacad5SJay Sternberg nvmeq->tags = &dev->tagset.tags[hctx_idx]; 28057dacad5SJay Sternberg 28157dacad5SJay Sternberg WARN_ON(dev->tagset.tags[hctx_idx] != hctx->tags); 28257dacad5SJay Sternberg hctx->driver_data = nvmeq; 28357dacad5SJay Sternberg return 0; 28457dacad5SJay Sternberg } 28557dacad5SJay Sternberg 28657dacad5SJay Sternberg static int nvme_init_request(void *data, struct request *req, 28757dacad5SJay Sternberg unsigned int hctx_idx, unsigned int rq_idx, 28857dacad5SJay Sternberg unsigned int numa_node) 28957dacad5SJay Sternberg { 29057dacad5SJay Sternberg struct nvme_dev *dev = data; 29157dacad5SJay Sternberg struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); 29257dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[hctx_idx + 1]; 29357dacad5SJay Sternberg 29457dacad5SJay Sternberg BUG_ON(!nvmeq); 29557dacad5SJay Sternberg cmd->nvmeq = nvmeq; 29657dacad5SJay Sternberg return 0; 29757dacad5SJay Sternberg } 29857dacad5SJay Sternberg 29957dacad5SJay Sternberg static void *iod_get_private(struct nvme_iod *iod) 30057dacad5SJay Sternberg { 30157dacad5SJay Sternberg return (void *) (iod->private & ~0x1UL); 30257dacad5SJay Sternberg } 30357dacad5SJay Sternberg 30457dacad5SJay Sternberg /* 30557dacad5SJay Sternberg * If bit 0 is set, the iod is embedded in the request payload. 30657dacad5SJay Sternberg */ 30757dacad5SJay Sternberg static bool iod_should_kfree(struct nvme_iod *iod) 30857dacad5SJay Sternberg { 30957dacad5SJay Sternberg return (iod->private & NVME_INT_MASK) == 0; 31057dacad5SJay Sternberg } 31157dacad5SJay Sternberg 312adf68f21SChristoph Hellwig static void nvme_complete_async_event(struct nvme_dev *dev, 31357dacad5SJay Sternberg struct nvme_completion *cqe) 31457dacad5SJay Sternberg { 315adf68f21SChristoph Hellwig u16 status = le16_to_cpu(cqe->status) >> 1; 316adf68f21SChristoph Hellwig u32 result = le32_to_cpu(cqe->result); 31757dacad5SJay Sternberg 31857dacad5SJay Sternberg if (status == NVME_SC_SUCCESS || status == NVME_SC_ABORT_REQ) 319adf68f21SChristoph Hellwig ++dev->ctrl.event_limit; 32057dacad5SJay Sternberg if (status != NVME_SC_SUCCESS) 32157dacad5SJay Sternberg return; 32257dacad5SJay Sternberg 32357dacad5SJay Sternberg switch (result & 0xff07) { 32457dacad5SJay Sternberg case NVME_AER_NOTICE_NS_CHANGED: 325adf68f21SChristoph Hellwig dev_info(dev->dev, "rescanning\n"); 326adf68f21SChristoph Hellwig queue_work(nvme_workq, &dev->scan_work); 32757dacad5SJay Sternberg default: 328adf68f21SChristoph Hellwig dev_warn(dev->dev, "async event result %08x\n", result); 32957dacad5SJay Sternberg } 33057dacad5SJay Sternberg } 33157dacad5SJay Sternberg 33257dacad5SJay Sternberg /** 333adf68f21SChristoph Hellwig * __nvme_submit_cmd() - Copy a command into a queue and ring the doorbell 33457dacad5SJay Sternberg * @nvmeq: The queue to use 33557dacad5SJay Sternberg * @cmd: The command to send 33657dacad5SJay Sternberg * 33757dacad5SJay Sternberg * Safe to use from interrupt context 33857dacad5SJay Sternberg */ 33957dacad5SJay Sternberg static void __nvme_submit_cmd(struct nvme_queue *nvmeq, 34057dacad5SJay Sternberg struct nvme_command *cmd) 34157dacad5SJay Sternberg { 34257dacad5SJay Sternberg u16 tail = nvmeq->sq_tail; 34357dacad5SJay Sternberg 34457dacad5SJay Sternberg if (nvmeq->sq_cmds_io) 34557dacad5SJay Sternberg memcpy_toio(&nvmeq->sq_cmds_io[tail], cmd, sizeof(*cmd)); 34657dacad5SJay Sternberg else 34757dacad5SJay Sternberg memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); 34857dacad5SJay Sternberg 34957dacad5SJay Sternberg if (++tail == nvmeq->q_depth) 35057dacad5SJay Sternberg tail = 0; 35157dacad5SJay Sternberg writel(tail, nvmeq->q_db); 35257dacad5SJay Sternberg nvmeq->sq_tail = tail; 35357dacad5SJay Sternberg } 35457dacad5SJay Sternberg 35557dacad5SJay Sternberg static __le64 **iod_list(struct nvme_iod *iod) 35657dacad5SJay Sternberg { 35757dacad5SJay Sternberg return ((void *)iod) + iod->offset; 35857dacad5SJay Sternberg } 35957dacad5SJay Sternberg 36057dacad5SJay Sternberg static inline void iod_init(struct nvme_iod *iod, unsigned nbytes, 36157dacad5SJay Sternberg unsigned nseg, unsigned long private) 36257dacad5SJay Sternberg { 36357dacad5SJay Sternberg iod->private = private; 36457dacad5SJay Sternberg iod->offset = offsetof(struct nvme_iod, sg[nseg]); 36557dacad5SJay Sternberg iod->npages = -1; 36657dacad5SJay Sternberg iod->length = nbytes; 36757dacad5SJay Sternberg iod->nents = 0; 36857dacad5SJay Sternberg } 36957dacad5SJay Sternberg 37057dacad5SJay Sternberg static struct nvme_iod * 37157dacad5SJay Sternberg __nvme_alloc_iod(unsigned nseg, unsigned bytes, struct nvme_dev *dev, 37257dacad5SJay Sternberg unsigned long priv, gfp_t gfp) 37357dacad5SJay Sternberg { 37457dacad5SJay Sternberg struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + 37557dacad5SJay Sternberg sizeof(__le64 *) * nvme_npages(bytes, dev) + 37657dacad5SJay Sternberg sizeof(struct scatterlist) * nseg, gfp); 37757dacad5SJay Sternberg 37857dacad5SJay Sternberg if (iod) 37957dacad5SJay Sternberg iod_init(iod, bytes, nseg, priv); 38057dacad5SJay Sternberg 38157dacad5SJay Sternberg return iod; 38257dacad5SJay Sternberg } 38357dacad5SJay Sternberg 38457dacad5SJay Sternberg static struct nvme_iod *nvme_alloc_iod(struct request *rq, struct nvme_dev *dev, 38557dacad5SJay Sternberg gfp_t gfp) 38657dacad5SJay Sternberg { 38757dacad5SJay Sternberg unsigned size = !(rq->cmd_flags & REQ_DISCARD) ? blk_rq_bytes(rq) : 38857dacad5SJay Sternberg sizeof(struct nvme_dsm_range); 38957dacad5SJay Sternberg struct nvme_iod *iod; 39057dacad5SJay Sternberg 39157dacad5SJay Sternberg if (rq->nr_phys_segments <= NVME_INT_PAGES && 39257dacad5SJay Sternberg size <= NVME_INT_BYTES(dev)) { 39357dacad5SJay Sternberg struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(rq); 39457dacad5SJay Sternberg 395aae239e1SChristoph Hellwig iod = &cmd->__iod; 39657dacad5SJay Sternberg iod_init(iod, size, rq->nr_phys_segments, 39757dacad5SJay Sternberg (unsigned long) rq | NVME_INT_MASK); 39857dacad5SJay Sternberg return iod; 39957dacad5SJay Sternberg } 40057dacad5SJay Sternberg 40157dacad5SJay Sternberg return __nvme_alloc_iod(rq->nr_phys_segments, size, dev, 40257dacad5SJay Sternberg (unsigned long) rq, gfp); 40357dacad5SJay Sternberg } 40457dacad5SJay Sternberg 40557dacad5SJay Sternberg static void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) 40657dacad5SJay Sternberg { 4075fd4ce1bSChristoph Hellwig const int last_prp = dev->ctrl.page_size / 8 - 1; 40857dacad5SJay Sternberg int i; 40957dacad5SJay Sternberg __le64 **list = iod_list(iod); 41057dacad5SJay Sternberg dma_addr_t prp_dma = iod->first_dma; 41157dacad5SJay Sternberg 41257dacad5SJay Sternberg if (iod->npages == 0) 41357dacad5SJay Sternberg dma_pool_free(dev->prp_small_pool, list[0], prp_dma); 41457dacad5SJay Sternberg for (i = 0; i < iod->npages; i++) { 41557dacad5SJay Sternberg __le64 *prp_list = list[i]; 41657dacad5SJay Sternberg dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); 41757dacad5SJay Sternberg dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); 41857dacad5SJay Sternberg prp_dma = next_prp_dma; 41957dacad5SJay Sternberg } 42057dacad5SJay Sternberg 42157dacad5SJay Sternberg if (iod_should_kfree(iod)) 42257dacad5SJay Sternberg kfree(iod); 42357dacad5SJay Sternberg } 42457dacad5SJay Sternberg 42557dacad5SJay Sternberg #ifdef CONFIG_BLK_DEV_INTEGRITY 42657dacad5SJay Sternberg static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) 42757dacad5SJay Sternberg { 42857dacad5SJay Sternberg if (be32_to_cpu(pi->ref_tag) == v) 42957dacad5SJay Sternberg pi->ref_tag = cpu_to_be32(p); 43057dacad5SJay Sternberg } 43157dacad5SJay Sternberg 43257dacad5SJay Sternberg static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) 43357dacad5SJay Sternberg { 43457dacad5SJay Sternberg if (be32_to_cpu(pi->ref_tag) == p) 43557dacad5SJay Sternberg pi->ref_tag = cpu_to_be32(v); 43657dacad5SJay Sternberg } 43757dacad5SJay Sternberg 43857dacad5SJay Sternberg /** 43957dacad5SJay Sternberg * nvme_dif_remap - remaps ref tags to bip seed and physical lba 44057dacad5SJay Sternberg * 44157dacad5SJay Sternberg * The virtual start sector is the one that was originally submitted by the 44257dacad5SJay Sternberg * block layer. Due to partitioning, MD/DM cloning, etc. the actual physical 44357dacad5SJay Sternberg * start sector may be different. Remap protection information to match the 44457dacad5SJay Sternberg * physical LBA on writes, and back to the original seed on reads. 44557dacad5SJay Sternberg * 44657dacad5SJay Sternberg * Type 0 and 3 do not have a ref tag, so no remapping required. 44757dacad5SJay Sternberg */ 44857dacad5SJay Sternberg static void nvme_dif_remap(struct request *req, 44957dacad5SJay Sternberg void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) 45057dacad5SJay Sternberg { 45157dacad5SJay Sternberg struct nvme_ns *ns = req->rq_disk->private_data; 45257dacad5SJay Sternberg struct bio_integrity_payload *bip; 45357dacad5SJay Sternberg struct t10_pi_tuple *pi; 45457dacad5SJay Sternberg void *p, *pmap; 45557dacad5SJay Sternberg u32 i, nlb, ts, phys, virt; 45657dacad5SJay Sternberg 45757dacad5SJay Sternberg if (!ns->pi_type || ns->pi_type == NVME_NS_DPS_PI_TYPE3) 45857dacad5SJay Sternberg return; 45957dacad5SJay Sternberg 46057dacad5SJay Sternberg bip = bio_integrity(req->bio); 46157dacad5SJay Sternberg if (!bip) 46257dacad5SJay Sternberg return; 46357dacad5SJay Sternberg 46457dacad5SJay Sternberg pmap = kmap_atomic(bip->bip_vec->bv_page) + bip->bip_vec->bv_offset; 46557dacad5SJay Sternberg 46657dacad5SJay Sternberg p = pmap; 46757dacad5SJay Sternberg virt = bip_get_seed(bip); 46857dacad5SJay Sternberg phys = nvme_block_nr(ns, blk_rq_pos(req)); 46957dacad5SJay Sternberg nlb = (blk_rq_bytes(req) >> ns->lba_shift); 470ac6fc48cSDan Williams ts = ns->disk->queue->integrity.tuple_size; 47157dacad5SJay Sternberg 47257dacad5SJay Sternberg for (i = 0; i < nlb; i++, virt++, phys++) { 47357dacad5SJay Sternberg pi = (struct t10_pi_tuple *)p; 47457dacad5SJay Sternberg dif_swap(phys, virt, pi); 47557dacad5SJay Sternberg p += ts; 47657dacad5SJay Sternberg } 47757dacad5SJay Sternberg kunmap_atomic(pmap); 47857dacad5SJay Sternberg } 47957dacad5SJay Sternberg #else /* CONFIG_BLK_DEV_INTEGRITY */ 48057dacad5SJay Sternberg static void nvme_dif_remap(struct request *req, 48157dacad5SJay Sternberg void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi)) 48257dacad5SJay Sternberg { 48357dacad5SJay Sternberg } 48457dacad5SJay Sternberg static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi) 48557dacad5SJay Sternberg { 48657dacad5SJay Sternberg } 48757dacad5SJay Sternberg static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) 48857dacad5SJay Sternberg { 48957dacad5SJay Sternberg } 49057dacad5SJay Sternberg #endif 49157dacad5SJay Sternberg 49269d2b571SChristoph Hellwig static bool nvme_setup_prps(struct nvme_dev *dev, struct nvme_iod *iod, 49369d2b571SChristoph Hellwig int total_len) 49457dacad5SJay Sternberg { 49557dacad5SJay Sternberg struct dma_pool *pool; 49657dacad5SJay Sternberg int length = total_len; 49757dacad5SJay Sternberg struct scatterlist *sg = iod->sg; 49857dacad5SJay Sternberg int dma_len = sg_dma_len(sg); 49957dacad5SJay Sternberg u64 dma_addr = sg_dma_address(sg); 5005fd4ce1bSChristoph Hellwig u32 page_size = dev->ctrl.page_size; 50157dacad5SJay Sternberg int offset = dma_addr & (page_size - 1); 50257dacad5SJay Sternberg __le64 *prp_list; 50357dacad5SJay Sternberg __le64 **list = iod_list(iod); 50457dacad5SJay Sternberg dma_addr_t prp_dma; 50557dacad5SJay Sternberg int nprps, i; 50657dacad5SJay Sternberg 50757dacad5SJay Sternberg length -= (page_size - offset); 50857dacad5SJay Sternberg if (length <= 0) 50969d2b571SChristoph Hellwig return true; 51057dacad5SJay Sternberg 51157dacad5SJay Sternberg dma_len -= (page_size - offset); 51257dacad5SJay Sternberg if (dma_len) { 51357dacad5SJay Sternberg dma_addr += (page_size - offset); 51457dacad5SJay Sternberg } else { 51557dacad5SJay Sternberg sg = sg_next(sg); 51657dacad5SJay Sternberg dma_addr = sg_dma_address(sg); 51757dacad5SJay Sternberg dma_len = sg_dma_len(sg); 51857dacad5SJay Sternberg } 51957dacad5SJay Sternberg 52057dacad5SJay Sternberg if (length <= page_size) { 52157dacad5SJay Sternberg iod->first_dma = dma_addr; 52269d2b571SChristoph Hellwig return true; 52357dacad5SJay Sternberg } 52457dacad5SJay Sternberg 52557dacad5SJay Sternberg nprps = DIV_ROUND_UP(length, page_size); 52657dacad5SJay Sternberg if (nprps <= (256 / 8)) { 52757dacad5SJay Sternberg pool = dev->prp_small_pool; 52857dacad5SJay Sternberg iod->npages = 0; 52957dacad5SJay Sternberg } else { 53057dacad5SJay Sternberg pool = dev->prp_page_pool; 53157dacad5SJay Sternberg iod->npages = 1; 53257dacad5SJay Sternberg } 53357dacad5SJay Sternberg 53469d2b571SChristoph Hellwig prp_list = dma_pool_alloc(pool, GFP_ATOMIC, &prp_dma); 53557dacad5SJay Sternberg if (!prp_list) { 53657dacad5SJay Sternberg iod->first_dma = dma_addr; 53757dacad5SJay Sternberg iod->npages = -1; 53869d2b571SChristoph Hellwig return false; 53957dacad5SJay Sternberg } 54057dacad5SJay Sternberg list[0] = prp_list; 54157dacad5SJay Sternberg iod->first_dma = prp_dma; 54257dacad5SJay Sternberg i = 0; 54357dacad5SJay Sternberg for (;;) { 54457dacad5SJay Sternberg if (i == page_size >> 3) { 54557dacad5SJay Sternberg __le64 *old_prp_list = prp_list; 54669d2b571SChristoph Hellwig prp_list = dma_pool_alloc(pool, GFP_ATOMIC, &prp_dma); 54757dacad5SJay Sternberg if (!prp_list) 54869d2b571SChristoph Hellwig return false; 54957dacad5SJay Sternberg list[iod->npages++] = prp_list; 55057dacad5SJay Sternberg prp_list[0] = old_prp_list[i - 1]; 55157dacad5SJay Sternberg old_prp_list[i - 1] = cpu_to_le64(prp_dma); 55257dacad5SJay Sternberg i = 1; 55357dacad5SJay Sternberg } 55457dacad5SJay Sternberg prp_list[i++] = cpu_to_le64(dma_addr); 55557dacad5SJay Sternberg dma_len -= page_size; 55657dacad5SJay Sternberg dma_addr += page_size; 55757dacad5SJay Sternberg length -= page_size; 55857dacad5SJay Sternberg if (length <= 0) 55957dacad5SJay Sternberg break; 56057dacad5SJay Sternberg if (dma_len > 0) 56157dacad5SJay Sternberg continue; 56257dacad5SJay Sternberg BUG_ON(dma_len < 0); 56357dacad5SJay Sternberg sg = sg_next(sg); 56457dacad5SJay Sternberg dma_addr = sg_dma_address(sg); 56557dacad5SJay Sternberg dma_len = sg_dma_len(sg); 56657dacad5SJay Sternberg } 56757dacad5SJay Sternberg 56869d2b571SChristoph Hellwig return true; 56957dacad5SJay Sternberg } 57057dacad5SJay Sternberg 571ba1ca37eSChristoph Hellwig static int nvme_map_data(struct nvme_dev *dev, struct nvme_iod *iod, 572ba1ca37eSChristoph Hellwig struct nvme_command *cmnd) 57357dacad5SJay Sternberg { 574ba1ca37eSChristoph Hellwig struct request *req = iod_get_private(iod); 575ba1ca37eSChristoph Hellwig struct request_queue *q = req->q; 576ba1ca37eSChristoph Hellwig enum dma_data_direction dma_dir = rq_data_dir(req) ? 577ba1ca37eSChristoph Hellwig DMA_TO_DEVICE : DMA_FROM_DEVICE; 578ba1ca37eSChristoph Hellwig int ret = BLK_MQ_RQ_QUEUE_ERROR; 57957dacad5SJay Sternberg 580ba1ca37eSChristoph Hellwig sg_init_table(iod->sg, req->nr_phys_segments); 581ba1ca37eSChristoph Hellwig iod->nents = blk_rq_map_sg(q, req, iod->sg); 582ba1ca37eSChristoph Hellwig if (!iod->nents) 583ba1ca37eSChristoph Hellwig goto out; 584ba1ca37eSChristoph Hellwig 585ba1ca37eSChristoph Hellwig ret = BLK_MQ_RQ_QUEUE_BUSY; 586ba1ca37eSChristoph Hellwig if (!dma_map_sg(dev->dev, iod->sg, iod->nents, dma_dir)) 587ba1ca37eSChristoph Hellwig goto out; 588ba1ca37eSChristoph Hellwig 589ba1ca37eSChristoph Hellwig if (!nvme_setup_prps(dev, iod, blk_rq_bytes(req))) 590ba1ca37eSChristoph Hellwig goto out_unmap; 591ba1ca37eSChristoph Hellwig 592ba1ca37eSChristoph Hellwig ret = BLK_MQ_RQ_QUEUE_ERROR; 593ba1ca37eSChristoph Hellwig if (blk_integrity_rq(req)) { 594ba1ca37eSChristoph Hellwig if (blk_rq_count_integrity_sg(q, req->bio) != 1) 595ba1ca37eSChristoph Hellwig goto out_unmap; 596ba1ca37eSChristoph Hellwig 597ba1ca37eSChristoph Hellwig sg_init_table(iod->meta_sg, 1); 598ba1ca37eSChristoph Hellwig if (blk_rq_map_integrity_sg(q, req->bio, iod->meta_sg) != 1) 599ba1ca37eSChristoph Hellwig goto out_unmap; 600ba1ca37eSChristoph Hellwig 601ba1ca37eSChristoph Hellwig if (rq_data_dir(req)) 602ba1ca37eSChristoph Hellwig nvme_dif_remap(req, nvme_dif_prep); 603ba1ca37eSChristoph Hellwig 604ba1ca37eSChristoph Hellwig if (!dma_map_sg(dev->dev, iod->meta_sg, 1, dma_dir)) 605ba1ca37eSChristoph Hellwig goto out_unmap; 60657dacad5SJay Sternberg } 60757dacad5SJay Sternberg 608ba1ca37eSChristoph Hellwig cmnd->rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg)); 609ba1ca37eSChristoph Hellwig cmnd->rw.prp2 = cpu_to_le64(iod->first_dma); 610ba1ca37eSChristoph Hellwig if (blk_integrity_rq(req)) 611ba1ca37eSChristoph Hellwig cmnd->rw.metadata = cpu_to_le64(sg_dma_address(iod->meta_sg)); 612ba1ca37eSChristoph Hellwig return BLK_MQ_RQ_QUEUE_OK; 613ba1ca37eSChristoph Hellwig 614ba1ca37eSChristoph Hellwig out_unmap: 615ba1ca37eSChristoph Hellwig dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); 616ba1ca37eSChristoph Hellwig out: 617ba1ca37eSChristoph Hellwig return ret; 61857dacad5SJay Sternberg } 61957dacad5SJay Sternberg 620d4f6c3abSChristoph Hellwig static void nvme_unmap_data(struct nvme_dev *dev, struct nvme_iod *iod) 621d4f6c3abSChristoph Hellwig { 622d4f6c3abSChristoph Hellwig struct request *req = iod_get_private(iod); 623d4f6c3abSChristoph Hellwig enum dma_data_direction dma_dir = rq_data_dir(req) ? 624d4f6c3abSChristoph Hellwig DMA_TO_DEVICE : DMA_FROM_DEVICE; 625d4f6c3abSChristoph Hellwig 626d4f6c3abSChristoph Hellwig if (iod->nents) { 627d4f6c3abSChristoph Hellwig dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); 628d4f6c3abSChristoph Hellwig if (blk_integrity_rq(req)) { 629d4f6c3abSChristoph Hellwig if (!rq_data_dir(req)) 630d4f6c3abSChristoph Hellwig nvme_dif_remap(req, nvme_dif_complete); 631d4f6c3abSChristoph Hellwig dma_unmap_sg(dev->dev, iod->meta_sg, 1, dma_dir); 632d4f6c3abSChristoph Hellwig } 633d4f6c3abSChristoph Hellwig } 634d4f6c3abSChristoph Hellwig 635d4f6c3abSChristoph Hellwig nvme_free_iod(dev, iod); 636d4f6c3abSChristoph Hellwig } 637d4f6c3abSChristoph Hellwig 63857dacad5SJay Sternberg /* 63957dacad5SJay Sternberg * We reuse the small pool to allocate the 16-byte range here as it is not 64057dacad5SJay Sternberg * worth having a special pool for these or additional cases to handle freeing 64157dacad5SJay Sternberg * the iod. 64257dacad5SJay Sternberg */ 643ba1ca37eSChristoph Hellwig static int nvme_setup_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, 644ba1ca37eSChristoph Hellwig struct nvme_iod *iod, struct nvme_command *cmnd) 64557dacad5SJay Sternberg { 646ba1ca37eSChristoph Hellwig struct request *req = iod_get_private(iod); 647ba1ca37eSChristoph Hellwig struct nvme_dsm_range *range; 648ba1ca37eSChristoph Hellwig 649ba1ca37eSChristoph Hellwig range = dma_pool_alloc(nvmeq->dev->prp_small_pool, GFP_ATOMIC, 650ba1ca37eSChristoph Hellwig &iod->first_dma); 651ba1ca37eSChristoph Hellwig if (!range) 652ba1ca37eSChristoph Hellwig return BLK_MQ_RQ_QUEUE_BUSY; 653ba1ca37eSChristoph Hellwig iod_list(iod)[0] = (__le64 *)range; 654ba1ca37eSChristoph Hellwig iod->npages = 0; 65557dacad5SJay Sternberg 65657dacad5SJay Sternberg range->cattr = cpu_to_le32(0); 65757dacad5SJay Sternberg range->nlb = cpu_to_le32(blk_rq_bytes(req) >> ns->lba_shift); 65857dacad5SJay Sternberg range->slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); 65957dacad5SJay Sternberg 660ba1ca37eSChristoph Hellwig memset(cmnd, 0, sizeof(*cmnd)); 661ba1ca37eSChristoph Hellwig cmnd->dsm.opcode = nvme_cmd_dsm; 662ba1ca37eSChristoph Hellwig cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); 663ba1ca37eSChristoph Hellwig cmnd->dsm.prp1 = cpu_to_le64(iod->first_dma); 664ba1ca37eSChristoph Hellwig cmnd->dsm.nr = 0; 665ba1ca37eSChristoph Hellwig cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); 666ba1ca37eSChristoph Hellwig return BLK_MQ_RQ_QUEUE_OK; 66757dacad5SJay Sternberg } 66857dacad5SJay Sternberg 66957dacad5SJay Sternberg /* 67057dacad5SJay Sternberg * NOTE: ns is NULL when called on the admin queue. 67157dacad5SJay Sternberg */ 67257dacad5SJay Sternberg static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx, 67357dacad5SJay Sternberg const struct blk_mq_queue_data *bd) 67457dacad5SJay Sternberg { 67557dacad5SJay Sternberg struct nvme_ns *ns = hctx->queue->queuedata; 67657dacad5SJay Sternberg struct nvme_queue *nvmeq = hctx->driver_data; 67757dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 67857dacad5SJay Sternberg struct request *req = bd->rq; 67957dacad5SJay Sternberg struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); 68057dacad5SJay Sternberg struct nvme_iod *iod; 681ba1ca37eSChristoph Hellwig struct nvme_command cmnd; 682ba1ca37eSChristoph Hellwig int ret = BLK_MQ_RQ_QUEUE_OK; 68357dacad5SJay Sternberg 68457dacad5SJay Sternberg /* 68557dacad5SJay Sternberg * If formated with metadata, require the block layer provide a buffer 68657dacad5SJay Sternberg * unless this namespace is formated such that the metadata can be 68757dacad5SJay Sternberg * stripped/generated by the controller with PRACT=1. 68857dacad5SJay Sternberg */ 68957dacad5SJay Sternberg if (ns && ns->ms && !blk_integrity_rq(req)) { 69057dacad5SJay Sternberg if (!(ns->pi_type && ns->ms == 8) && 69157dacad5SJay Sternberg req->cmd_type != REQ_TYPE_DRV_PRIV) { 692*eee417b0SChristoph Hellwig blk_mq_end_request(req, -EFAULT); 69357dacad5SJay Sternberg return BLK_MQ_RQ_QUEUE_OK; 69457dacad5SJay Sternberg } 69557dacad5SJay Sternberg } 69657dacad5SJay Sternberg 69757dacad5SJay Sternberg iod = nvme_alloc_iod(req, dev, GFP_ATOMIC); 69857dacad5SJay Sternberg if (!iod) 69957dacad5SJay Sternberg return BLK_MQ_RQ_QUEUE_BUSY; 70057dacad5SJay Sternberg 70157dacad5SJay Sternberg if (req->cmd_flags & REQ_DISCARD) { 702ba1ca37eSChristoph Hellwig ret = nvme_setup_discard(nvmeq, ns, iod, &cmnd); 703ba1ca37eSChristoph Hellwig } else { 70457dacad5SJay Sternberg if (req->cmd_type == REQ_TYPE_DRV_PRIV) 705ba1ca37eSChristoph Hellwig memcpy(&cmnd, req->cmd, sizeof(cmnd)); 70657dacad5SJay Sternberg else if (req->cmd_flags & REQ_FLUSH) 707ba1ca37eSChristoph Hellwig nvme_setup_flush(ns, &cmnd); 70857dacad5SJay Sternberg else 709ba1ca37eSChristoph Hellwig nvme_setup_rw(ns, req, &cmnd); 71057dacad5SJay Sternberg 711ba1ca37eSChristoph Hellwig if (req->nr_phys_segments) 712ba1ca37eSChristoph Hellwig ret = nvme_map_data(dev, iod, &cmnd); 713ba1ca37eSChristoph Hellwig } 714ba1ca37eSChristoph Hellwig 715ba1ca37eSChristoph Hellwig if (ret) 716ba1ca37eSChristoph Hellwig goto out; 717ba1ca37eSChristoph Hellwig 718aae239e1SChristoph Hellwig cmd->iod = iod; 719aae239e1SChristoph Hellwig cmd->aborted = 0; 720ba1ca37eSChristoph Hellwig cmnd.common.command_id = req->tag; 721aae239e1SChristoph Hellwig blk_mq_start_request(req); 722ba1ca37eSChristoph Hellwig 723ba1ca37eSChristoph Hellwig spin_lock_irq(&nvmeq->q_lock); 724ba1ca37eSChristoph Hellwig __nvme_submit_cmd(nvmeq, &cmnd); 72557dacad5SJay Sternberg nvme_process_cq(nvmeq); 72657dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 72757dacad5SJay Sternberg return BLK_MQ_RQ_QUEUE_OK; 728ba1ca37eSChristoph Hellwig out: 72957dacad5SJay Sternberg nvme_free_iod(dev, iod); 730ba1ca37eSChristoph Hellwig return ret; 73157dacad5SJay Sternberg } 73257dacad5SJay Sternberg 733*eee417b0SChristoph Hellwig static void nvme_complete_rq(struct request *req) 734*eee417b0SChristoph Hellwig { 735*eee417b0SChristoph Hellwig struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); 736*eee417b0SChristoph Hellwig struct nvme_dev *dev = cmd->nvmeq->dev; 737*eee417b0SChristoph Hellwig int error = 0; 738*eee417b0SChristoph Hellwig 739*eee417b0SChristoph Hellwig nvme_unmap_data(dev, cmd->iod); 740*eee417b0SChristoph Hellwig 741*eee417b0SChristoph Hellwig if (unlikely(req->errors)) { 742*eee417b0SChristoph Hellwig if (nvme_req_needs_retry(req, req->errors)) { 743*eee417b0SChristoph Hellwig nvme_requeue_req(req); 744*eee417b0SChristoph Hellwig return; 745*eee417b0SChristoph Hellwig } 746*eee417b0SChristoph Hellwig 747*eee417b0SChristoph Hellwig if (req->cmd_type == REQ_TYPE_DRV_PRIV) 748*eee417b0SChristoph Hellwig error = req->errors; 749*eee417b0SChristoph Hellwig else 750*eee417b0SChristoph Hellwig error = nvme_error_status(req->errors); 751*eee417b0SChristoph Hellwig } 752*eee417b0SChristoph Hellwig 753*eee417b0SChristoph Hellwig if (unlikely(cmd->aborted)) { 754*eee417b0SChristoph Hellwig dev_warn(dev->dev, 755*eee417b0SChristoph Hellwig "completing aborted command with status: %04x\n", 756*eee417b0SChristoph Hellwig req->errors); 757*eee417b0SChristoph Hellwig } 758*eee417b0SChristoph Hellwig 759*eee417b0SChristoph Hellwig blk_mq_end_request(req, error); 760*eee417b0SChristoph Hellwig } 761*eee417b0SChristoph Hellwig 762a0fa9647SJens Axboe static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag) 76357dacad5SJay Sternberg { 76457dacad5SJay Sternberg u16 head, phase; 76557dacad5SJay Sternberg 76657dacad5SJay Sternberg head = nvmeq->cq_head; 76757dacad5SJay Sternberg phase = nvmeq->cq_phase; 76857dacad5SJay Sternberg 76957dacad5SJay Sternberg for (;;) { 77057dacad5SJay Sternberg struct nvme_completion cqe = nvmeq->cqes[head]; 771adf68f21SChristoph Hellwig u16 status = le16_to_cpu(cqe.status); 772*eee417b0SChristoph Hellwig struct request *req; 773adf68f21SChristoph Hellwig 774adf68f21SChristoph Hellwig if ((status & 1) != phase) 77557dacad5SJay Sternberg break; 77657dacad5SJay Sternberg nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 77757dacad5SJay Sternberg if (++head == nvmeq->q_depth) { 77857dacad5SJay Sternberg head = 0; 77957dacad5SJay Sternberg phase = !phase; 78057dacad5SJay Sternberg } 781adf68f21SChristoph Hellwig 782a0fa9647SJens Axboe if (tag && *tag == cqe.command_id) 783a0fa9647SJens Axboe *tag = -1; 784adf68f21SChristoph Hellwig 785aae239e1SChristoph Hellwig if (unlikely(cqe.command_id >= nvmeq->q_depth)) { 786aae239e1SChristoph Hellwig dev_warn(nvmeq->q_dmadev, 787aae239e1SChristoph Hellwig "invalid id %d completed on queue %d\n", 788aae239e1SChristoph Hellwig cqe.command_id, le16_to_cpu(cqe.sq_id)); 789aae239e1SChristoph Hellwig continue; 790aae239e1SChristoph Hellwig } 791aae239e1SChristoph Hellwig 792adf68f21SChristoph Hellwig /* 793adf68f21SChristoph Hellwig * AEN requests are special as they don't time out and can 794adf68f21SChristoph Hellwig * survive any kind of queue freeze and often don't respond to 795adf68f21SChristoph Hellwig * aborts. We don't even bother to allocate a struct request 796adf68f21SChristoph Hellwig * for them but rather special case them here. 797adf68f21SChristoph Hellwig */ 798adf68f21SChristoph Hellwig if (unlikely(nvmeq->qid == 0 && 799adf68f21SChristoph Hellwig cqe.command_id >= NVME_AQ_BLKMQ_DEPTH)) { 800adf68f21SChristoph Hellwig nvme_complete_async_event(nvmeq->dev, &cqe); 801adf68f21SChristoph Hellwig continue; 802adf68f21SChristoph Hellwig } 803adf68f21SChristoph Hellwig 804*eee417b0SChristoph Hellwig req = blk_mq_tag_to_rq(*nvmeq->tags, cqe.command_id); 805*eee417b0SChristoph Hellwig if (req->cmd_type == REQ_TYPE_DRV_PRIV) { 806*eee417b0SChristoph Hellwig u32 result = le32_to_cpu(cqe.result); 807*eee417b0SChristoph Hellwig req->special = (void *)(uintptr_t)result; 808*eee417b0SChristoph Hellwig } 809*eee417b0SChristoph Hellwig blk_mq_complete_request(req, status >> 1); 810*eee417b0SChristoph Hellwig 81157dacad5SJay Sternberg } 81257dacad5SJay Sternberg 81357dacad5SJay Sternberg /* If the controller ignores the cq head doorbell and continuously 81457dacad5SJay Sternberg * writes to the queue, it is theoretically possible to wrap around 81557dacad5SJay Sternberg * the queue twice and mistakenly return IRQ_NONE. Linux only 81657dacad5SJay Sternberg * requires that 0.1% of your interrupts are handled, so this isn't 81757dacad5SJay Sternberg * a big problem. 81857dacad5SJay Sternberg */ 81957dacad5SJay Sternberg if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 820a0fa9647SJens Axboe return; 82157dacad5SJay Sternberg 822604e8c8dSKeith Busch if (likely(nvmeq->cq_vector >= 0)) 82357dacad5SJay Sternberg writel(head, nvmeq->q_db + nvmeq->dev->db_stride); 82457dacad5SJay Sternberg nvmeq->cq_head = head; 82557dacad5SJay Sternberg nvmeq->cq_phase = phase; 82657dacad5SJay Sternberg 82757dacad5SJay Sternberg nvmeq->cqe_seen = 1; 828a0fa9647SJens Axboe } 829a0fa9647SJens Axboe 830a0fa9647SJens Axboe static void nvme_process_cq(struct nvme_queue *nvmeq) 831a0fa9647SJens Axboe { 832a0fa9647SJens Axboe __nvme_process_cq(nvmeq, NULL); 83357dacad5SJay Sternberg } 83457dacad5SJay Sternberg 83557dacad5SJay Sternberg static irqreturn_t nvme_irq(int irq, void *data) 83657dacad5SJay Sternberg { 83757dacad5SJay Sternberg irqreturn_t result; 83857dacad5SJay Sternberg struct nvme_queue *nvmeq = data; 83957dacad5SJay Sternberg spin_lock(&nvmeq->q_lock); 84057dacad5SJay Sternberg nvme_process_cq(nvmeq); 84157dacad5SJay Sternberg result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; 84257dacad5SJay Sternberg nvmeq->cqe_seen = 0; 84357dacad5SJay Sternberg spin_unlock(&nvmeq->q_lock); 84457dacad5SJay Sternberg return result; 84557dacad5SJay Sternberg } 84657dacad5SJay Sternberg 84757dacad5SJay Sternberg static irqreturn_t nvme_irq_check(int irq, void *data) 84857dacad5SJay Sternberg { 84957dacad5SJay Sternberg struct nvme_queue *nvmeq = data; 85057dacad5SJay Sternberg struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 85157dacad5SJay Sternberg if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 85257dacad5SJay Sternberg return IRQ_NONE; 85357dacad5SJay Sternberg return IRQ_WAKE_THREAD; 85457dacad5SJay Sternberg } 85557dacad5SJay Sternberg 856a0fa9647SJens Axboe static int nvme_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) 857a0fa9647SJens Axboe { 858a0fa9647SJens Axboe struct nvme_queue *nvmeq = hctx->driver_data; 859a0fa9647SJens Axboe 860a0fa9647SJens Axboe if ((le16_to_cpu(nvmeq->cqes[nvmeq->cq_head].status) & 1) == 861a0fa9647SJens Axboe nvmeq->cq_phase) { 862a0fa9647SJens Axboe spin_lock_irq(&nvmeq->q_lock); 863a0fa9647SJens Axboe __nvme_process_cq(nvmeq, &tag); 864a0fa9647SJens Axboe spin_unlock_irq(&nvmeq->q_lock); 865a0fa9647SJens Axboe 866a0fa9647SJens Axboe if (tag == -1) 867a0fa9647SJens Axboe return 1; 868a0fa9647SJens Axboe } 869a0fa9647SJens Axboe 870a0fa9647SJens Axboe return 0; 871a0fa9647SJens Axboe } 872a0fa9647SJens Axboe 873adf68f21SChristoph Hellwig static void nvme_submit_async_event(struct nvme_dev *dev) 87457dacad5SJay Sternberg { 87557dacad5SJay Sternberg struct nvme_command c; 87657dacad5SJay Sternberg 87757dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 87857dacad5SJay Sternberg c.common.opcode = nvme_admin_async_event; 879adf68f21SChristoph Hellwig c.common.command_id = NVME_AQ_BLKMQ_DEPTH + --dev->ctrl.event_limit; 88057dacad5SJay Sternberg 881adf68f21SChristoph Hellwig __nvme_submit_cmd(dev->queues[0], &c); 88257dacad5SJay Sternberg } 88357dacad5SJay Sternberg 884d8f32166SChristoph Hellwig static void async_cmd_info_endio(struct request *req, int error) 88557dacad5SJay Sternberg { 886d8f32166SChristoph Hellwig struct async_cmd_info *cmdinfo = req->end_io_data; 88757dacad5SJay Sternberg 888d8f32166SChristoph Hellwig cmdinfo->status = req->errors; 889d8f32166SChristoph Hellwig queue_kthread_work(cmdinfo->worker, &cmdinfo->work); 890d8f32166SChristoph Hellwig blk_mq_free_request(req); 89157dacad5SJay Sternberg } 89257dacad5SJay Sternberg 89357dacad5SJay Sternberg static int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 89457dacad5SJay Sternberg { 89557dacad5SJay Sternberg struct nvme_command c; 89657dacad5SJay Sternberg 89757dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 89857dacad5SJay Sternberg c.delete_queue.opcode = opcode; 89957dacad5SJay Sternberg c.delete_queue.qid = cpu_to_le16(id); 90057dacad5SJay Sternberg 9011c63dc66SChristoph Hellwig return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); 90257dacad5SJay Sternberg } 90357dacad5SJay Sternberg 90457dacad5SJay Sternberg static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 90557dacad5SJay Sternberg struct nvme_queue *nvmeq) 90657dacad5SJay Sternberg { 90757dacad5SJay Sternberg struct nvme_command c; 90857dacad5SJay Sternberg int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 90957dacad5SJay Sternberg 91057dacad5SJay Sternberg /* 91157dacad5SJay Sternberg * Note: we (ab)use the fact the the prp fields survive if no data 91257dacad5SJay Sternberg * is attached to the request. 91357dacad5SJay Sternberg */ 91457dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 91557dacad5SJay Sternberg c.create_cq.opcode = nvme_admin_create_cq; 91657dacad5SJay Sternberg c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 91757dacad5SJay Sternberg c.create_cq.cqid = cpu_to_le16(qid); 91857dacad5SJay Sternberg c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 91957dacad5SJay Sternberg c.create_cq.cq_flags = cpu_to_le16(flags); 92057dacad5SJay Sternberg c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 92157dacad5SJay Sternberg 9221c63dc66SChristoph Hellwig return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); 92357dacad5SJay Sternberg } 92457dacad5SJay Sternberg 92557dacad5SJay Sternberg static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 92657dacad5SJay Sternberg struct nvme_queue *nvmeq) 92757dacad5SJay Sternberg { 92857dacad5SJay Sternberg struct nvme_command c; 92957dacad5SJay Sternberg int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 93057dacad5SJay Sternberg 93157dacad5SJay Sternberg /* 93257dacad5SJay Sternberg * Note: we (ab)use the fact the the prp fields survive if no data 93357dacad5SJay Sternberg * is attached to the request. 93457dacad5SJay Sternberg */ 93557dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 93657dacad5SJay Sternberg c.create_sq.opcode = nvme_admin_create_sq; 93757dacad5SJay Sternberg c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 93857dacad5SJay Sternberg c.create_sq.sqid = cpu_to_le16(qid); 93957dacad5SJay Sternberg c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 94057dacad5SJay Sternberg c.create_sq.sq_flags = cpu_to_le16(flags); 94157dacad5SJay Sternberg c.create_sq.cqid = cpu_to_le16(qid); 94257dacad5SJay Sternberg 9431c63dc66SChristoph Hellwig return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); 94457dacad5SJay Sternberg } 94557dacad5SJay Sternberg 94657dacad5SJay Sternberg static int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 94757dacad5SJay Sternberg { 94857dacad5SJay Sternberg return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 94957dacad5SJay Sternberg } 95057dacad5SJay Sternberg 95157dacad5SJay Sternberg static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 95257dacad5SJay Sternberg { 95357dacad5SJay Sternberg return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 95457dacad5SJay Sternberg } 95557dacad5SJay Sternberg 956e7a2a87dSChristoph Hellwig static void abort_endio(struct request *req, int error) 957e7a2a87dSChristoph Hellwig { 958e7a2a87dSChristoph Hellwig struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); 959e7a2a87dSChristoph Hellwig struct nvme_queue *nvmeq = cmd->nvmeq; 960e7a2a87dSChristoph Hellwig u32 result = (u32)(uintptr_t)req->special; 961e7a2a87dSChristoph Hellwig u16 status = req->errors; 962e7a2a87dSChristoph Hellwig 963e7a2a87dSChristoph Hellwig dev_warn(nvmeq->q_dmadev, "Abort status:%x result:%x", status, result); 964e7a2a87dSChristoph Hellwig atomic_inc(&nvmeq->dev->ctrl.abort_limit); 965e7a2a87dSChristoph Hellwig 966e7a2a87dSChristoph Hellwig blk_mq_free_request(req); 967e7a2a87dSChristoph Hellwig } 968e7a2a87dSChristoph Hellwig 96931c7c7d2SChristoph Hellwig static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) 97057dacad5SJay Sternberg { 97157dacad5SJay Sternberg struct nvme_cmd_info *cmd_rq = blk_mq_rq_to_pdu(req); 97257dacad5SJay Sternberg struct nvme_queue *nvmeq = cmd_rq->nvmeq; 97357dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 97457dacad5SJay Sternberg struct request *abort_req; 97557dacad5SJay Sternberg struct nvme_command cmd; 97657dacad5SJay Sternberg 97731c7c7d2SChristoph Hellwig /* 978fd634f41SChristoph Hellwig * Shutdown immediately if controller times out while starting. The 979fd634f41SChristoph Hellwig * reset work will see the pci device disabled when it gets the forced 980fd634f41SChristoph Hellwig * cancellation error. All outstanding requests are completed on 981fd634f41SChristoph Hellwig * shutdown, so we return BLK_EH_HANDLED. 982fd634f41SChristoph Hellwig */ 983fd634f41SChristoph Hellwig if (test_bit(NVME_CTRL_RESETTING, &dev->flags)) { 984fd634f41SChristoph Hellwig dev_warn(dev->dev, 985fd634f41SChristoph Hellwig "I/O %d QID %d timeout, disable controller\n", 986fd634f41SChristoph Hellwig req->tag, nvmeq->qid); 987fd634f41SChristoph Hellwig nvme_dev_shutdown(dev); 988fd634f41SChristoph Hellwig req->errors = NVME_SC_CANCELLED; 989fd634f41SChristoph Hellwig return BLK_EH_HANDLED; 990fd634f41SChristoph Hellwig } 991fd634f41SChristoph Hellwig 992fd634f41SChristoph Hellwig /* 993e1569a16SKeith Busch * Shutdown the controller immediately and schedule a reset if the 994e1569a16SKeith Busch * command was already aborted once before and still hasn't been 995e1569a16SKeith Busch * returned to the driver, or if this is the admin queue. 99631c7c7d2SChristoph Hellwig */ 99757dacad5SJay Sternberg if (!nvmeq->qid || cmd_rq->aborted) { 99857dacad5SJay Sternberg dev_warn(dev->dev, 99957dacad5SJay Sternberg "I/O %d QID %d timeout, reset controller\n", 100057dacad5SJay Sternberg req->tag, nvmeq->qid); 1001e1569a16SKeith Busch nvme_dev_shutdown(dev); 1002e1569a16SKeith Busch queue_work(nvme_workq, &dev->reset_work); 1003e1569a16SKeith Busch 1004e1569a16SKeith Busch /* 1005e1569a16SKeith Busch * Mark the request as handled, since the inline shutdown 1006e1569a16SKeith Busch * forces all outstanding requests to complete. 1007e1569a16SKeith Busch */ 1008e1569a16SKeith Busch req->errors = NVME_SC_CANCELLED; 1009e1569a16SKeith Busch return BLK_EH_HANDLED; 101057dacad5SJay Sternberg } 101157dacad5SJay Sternberg 1012e7a2a87dSChristoph Hellwig cmd_rq->aborted = 1; 101357dacad5SJay Sternberg 1014e7a2a87dSChristoph Hellwig if (atomic_dec_return(&dev->ctrl.abort_limit) < 0) { 1015e7a2a87dSChristoph Hellwig atomic_inc(&dev->ctrl.abort_limit); 1016e7a2a87dSChristoph Hellwig return BLK_EH_RESET_TIMER; 1017e7a2a87dSChristoph Hellwig } 1018e7a2a87dSChristoph Hellwig 1019e7a2a87dSChristoph Hellwig memset(&cmd, 0, sizeof(cmd)); 1020e7a2a87dSChristoph Hellwig cmd.abort.opcode = nvme_admin_abort_cmd; 1021e7a2a87dSChristoph Hellwig cmd.abort.cid = req->tag; 1022e7a2a87dSChristoph Hellwig cmd.abort.sqid = cpu_to_le16(nvmeq->qid); 1023e7a2a87dSChristoph Hellwig 1024e7a2a87dSChristoph Hellwig dev_warn(nvmeq->q_dmadev, "I/O %d QID %d timeout, aborting\n", 1025e7a2a87dSChristoph Hellwig req->tag, nvmeq->qid); 1026e7a2a87dSChristoph Hellwig 1027e7a2a87dSChristoph Hellwig abort_req = nvme_alloc_request(dev->ctrl.admin_q, &cmd, 10286f3b0e8bSChristoph Hellwig BLK_MQ_REQ_NOWAIT); 10296bf25d16SChristoph Hellwig if (IS_ERR(abort_req)) { 10306bf25d16SChristoph Hellwig atomic_inc(&dev->ctrl.abort_limit); 103131c7c7d2SChristoph Hellwig return BLK_EH_RESET_TIMER; 10326bf25d16SChristoph Hellwig } 103357dacad5SJay Sternberg 1034e7a2a87dSChristoph Hellwig abort_req->timeout = ADMIN_TIMEOUT; 1035e7a2a87dSChristoph Hellwig abort_req->end_io_data = NULL; 1036e7a2a87dSChristoph Hellwig blk_execute_rq_nowait(abort_req->q, NULL, abort_req, 0, abort_endio); 103731c7c7d2SChristoph Hellwig 103831c7c7d2SChristoph Hellwig /* 103931c7c7d2SChristoph Hellwig * The aborted req will be completed on receiving the abort req. 104031c7c7d2SChristoph Hellwig * We enable the timer again. If hit twice, it'll cause a device reset, 104131c7c7d2SChristoph Hellwig * as the device then is in a faulty state. 104231c7c7d2SChristoph Hellwig */ 104331c7c7d2SChristoph Hellwig return BLK_EH_RESET_TIMER; 104457dacad5SJay Sternberg } 104557dacad5SJay Sternberg 104657dacad5SJay Sternberg static void nvme_cancel_queue_ios(struct request *req, void *data, bool reserved) 104757dacad5SJay Sternberg { 104857dacad5SJay Sternberg struct nvme_queue *nvmeq = data; 1049aae239e1SChristoph Hellwig int status; 105057dacad5SJay Sternberg 105157dacad5SJay Sternberg if (!blk_mq_request_started(req)) 105257dacad5SJay Sternberg return; 105357dacad5SJay Sternberg 1054aae239e1SChristoph Hellwig dev_warn(nvmeq->q_dmadev, 1055aae239e1SChristoph Hellwig "Cancelling I/O %d QID %d\n", req->tag, nvmeq->qid); 105657dacad5SJay Sternberg 1057aae239e1SChristoph Hellwig status = NVME_SC_CANCELLED; 105857dacad5SJay Sternberg if (blk_queue_dying(req->q)) 1059aae239e1SChristoph Hellwig status |= NVME_SC_DNR; 1060aae239e1SChristoph Hellwig blk_mq_complete_request(req, status); 106157dacad5SJay Sternberg } 106257dacad5SJay Sternberg 106357dacad5SJay Sternberg static void nvme_free_queue(struct nvme_queue *nvmeq) 106457dacad5SJay Sternberg { 106557dacad5SJay Sternberg dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 106657dacad5SJay Sternberg (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 106757dacad5SJay Sternberg if (nvmeq->sq_cmds) 106857dacad5SJay Sternberg dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 106957dacad5SJay Sternberg nvmeq->sq_cmds, nvmeq->sq_dma_addr); 107057dacad5SJay Sternberg kfree(nvmeq); 107157dacad5SJay Sternberg } 107257dacad5SJay Sternberg 107357dacad5SJay Sternberg static void nvme_free_queues(struct nvme_dev *dev, int lowest) 107457dacad5SJay Sternberg { 107557dacad5SJay Sternberg int i; 107657dacad5SJay Sternberg 107757dacad5SJay Sternberg for (i = dev->queue_count - 1; i >= lowest; i--) { 107857dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 107957dacad5SJay Sternberg dev->queue_count--; 108057dacad5SJay Sternberg dev->queues[i] = NULL; 108157dacad5SJay Sternberg nvme_free_queue(nvmeq); 108257dacad5SJay Sternberg } 108357dacad5SJay Sternberg } 108457dacad5SJay Sternberg 108557dacad5SJay Sternberg /** 108657dacad5SJay Sternberg * nvme_suspend_queue - put queue into suspended state 108757dacad5SJay Sternberg * @nvmeq - queue to suspend 108857dacad5SJay Sternberg */ 108957dacad5SJay Sternberg static int nvme_suspend_queue(struct nvme_queue *nvmeq) 109057dacad5SJay Sternberg { 109157dacad5SJay Sternberg int vector; 109257dacad5SJay Sternberg 109357dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 109457dacad5SJay Sternberg if (nvmeq->cq_vector == -1) { 109557dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 109657dacad5SJay Sternberg return 1; 109757dacad5SJay Sternberg } 109857dacad5SJay Sternberg vector = nvmeq->dev->entry[nvmeq->cq_vector].vector; 109957dacad5SJay Sternberg nvmeq->dev->online_queues--; 110057dacad5SJay Sternberg nvmeq->cq_vector = -1; 110157dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 110257dacad5SJay Sternberg 11031c63dc66SChristoph Hellwig if (!nvmeq->qid && nvmeq->dev->ctrl.admin_q) 11041c63dc66SChristoph Hellwig blk_mq_freeze_queue_start(nvmeq->dev->ctrl.admin_q); 110557dacad5SJay Sternberg 110657dacad5SJay Sternberg irq_set_affinity_hint(vector, NULL); 110757dacad5SJay Sternberg free_irq(vector, nvmeq); 110857dacad5SJay Sternberg 110957dacad5SJay Sternberg return 0; 111057dacad5SJay Sternberg } 111157dacad5SJay Sternberg 111257dacad5SJay Sternberg static void nvme_clear_queue(struct nvme_queue *nvmeq) 111357dacad5SJay Sternberg { 111457dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 111557dacad5SJay Sternberg if (nvmeq->tags && *nvmeq->tags) 111657dacad5SJay Sternberg blk_mq_all_tag_busy_iter(*nvmeq->tags, nvme_cancel_queue_ios, nvmeq); 111757dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 111857dacad5SJay Sternberg } 111957dacad5SJay Sternberg 112057dacad5SJay Sternberg static void nvme_disable_queue(struct nvme_dev *dev, int qid) 112157dacad5SJay Sternberg { 112257dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[qid]; 112357dacad5SJay Sternberg 112457dacad5SJay Sternberg if (!nvmeq) 112557dacad5SJay Sternberg return; 112657dacad5SJay Sternberg if (nvme_suspend_queue(nvmeq)) 112757dacad5SJay Sternberg return; 112857dacad5SJay Sternberg 112957dacad5SJay Sternberg /* Don't tell the adapter to delete the admin queue. 113057dacad5SJay Sternberg * Don't tell a removed adapter to delete IO queues. */ 11317a67cbeaSChristoph Hellwig if (qid && readl(dev->bar + NVME_REG_CSTS) != -1) { 113257dacad5SJay Sternberg adapter_delete_sq(dev, qid); 113357dacad5SJay Sternberg adapter_delete_cq(dev, qid); 113457dacad5SJay Sternberg } 113557dacad5SJay Sternberg 113657dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 113757dacad5SJay Sternberg nvme_process_cq(nvmeq); 113857dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 113957dacad5SJay Sternberg } 114057dacad5SJay Sternberg 114157dacad5SJay Sternberg static int nvme_cmb_qdepth(struct nvme_dev *dev, int nr_io_queues, 114257dacad5SJay Sternberg int entry_size) 114357dacad5SJay Sternberg { 114457dacad5SJay Sternberg int q_depth = dev->q_depth; 11455fd4ce1bSChristoph Hellwig unsigned q_size_aligned = roundup(q_depth * entry_size, 11465fd4ce1bSChristoph Hellwig dev->ctrl.page_size); 114757dacad5SJay Sternberg 114857dacad5SJay Sternberg if (q_size_aligned * nr_io_queues > dev->cmb_size) { 114957dacad5SJay Sternberg u64 mem_per_q = div_u64(dev->cmb_size, nr_io_queues); 11505fd4ce1bSChristoph Hellwig mem_per_q = round_down(mem_per_q, dev->ctrl.page_size); 115157dacad5SJay Sternberg q_depth = div_u64(mem_per_q, entry_size); 115257dacad5SJay Sternberg 115357dacad5SJay Sternberg /* 115457dacad5SJay Sternberg * Ensure the reduced q_depth is above some threshold where it 115557dacad5SJay Sternberg * would be better to map queues in system memory with the 115657dacad5SJay Sternberg * original depth 115757dacad5SJay Sternberg */ 115857dacad5SJay Sternberg if (q_depth < 64) 115957dacad5SJay Sternberg return -ENOMEM; 116057dacad5SJay Sternberg } 116157dacad5SJay Sternberg 116257dacad5SJay Sternberg return q_depth; 116357dacad5SJay Sternberg } 116457dacad5SJay Sternberg 116557dacad5SJay Sternberg static int nvme_alloc_sq_cmds(struct nvme_dev *dev, struct nvme_queue *nvmeq, 116657dacad5SJay Sternberg int qid, int depth) 116757dacad5SJay Sternberg { 116857dacad5SJay Sternberg if (qid && dev->cmb && use_cmb_sqes && NVME_CMB_SQS(dev->cmbsz)) { 11695fd4ce1bSChristoph Hellwig unsigned offset = (qid - 1) * roundup(SQ_SIZE(depth), 11705fd4ce1bSChristoph Hellwig dev->ctrl.page_size); 117157dacad5SJay Sternberg nvmeq->sq_dma_addr = dev->cmb_dma_addr + offset; 117257dacad5SJay Sternberg nvmeq->sq_cmds_io = dev->cmb + offset; 117357dacad5SJay Sternberg } else { 117457dacad5SJay Sternberg nvmeq->sq_cmds = dma_alloc_coherent(dev->dev, SQ_SIZE(depth), 117557dacad5SJay Sternberg &nvmeq->sq_dma_addr, GFP_KERNEL); 117657dacad5SJay Sternberg if (!nvmeq->sq_cmds) 117757dacad5SJay Sternberg return -ENOMEM; 117857dacad5SJay Sternberg } 117957dacad5SJay Sternberg 118057dacad5SJay Sternberg return 0; 118157dacad5SJay Sternberg } 118257dacad5SJay Sternberg 118357dacad5SJay Sternberg static struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 118457dacad5SJay Sternberg int depth) 118557dacad5SJay Sternberg { 118657dacad5SJay Sternberg struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq), GFP_KERNEL); 118757dacad5SJay Sternberg if (!nvmeq) 118857dacad5SJay Sternberg return NULL; 118957dacad5SJay Sternberg 119057dacad5SJay Sternberg nvmeq->cqes = dma_zalloc_coherent(dev->dev, CQ_SIZE(depth), 119157dacad5SJay Sternberg &nvmeq->cq_dma_addr, GFP_KERNEL); 119257dacad5SJay Sternberg if (!nvmeq->cqes) 119357dacad5SJay Sternberg goto free_nvmeq; 119457dacad5SJay Sternberg 119557dacad5SJay Sternberg if (nvme_alloc_sq_cmds(dev, nvmeq, qid, depth)) 119657dacad5SJay Sternberg goto free_cqdma; 119757dacad5SJay Sternberg 119857dacad5SJay Sternberg nvmeq->q_dmadev = dev->dev; 119957dacad5SJay Sternberg nvmeq->dev = dev; 120057dacad5SJay Sternberg snprintf(nvmeq->irqname, sizeof(nvmeq->irqname), "nvme%dq%d", 12011c63dc66SChristoph Hellwig dev->ctrl.instance, qid); 120257dacad5SJay Sternberg spin_lock_init(&nvmeq->q_lock); 120357dacad5SJay Sternberg nvmeq->cq_head = 0; 120457dacad5SJay Sternberg nvmeq->cq_phase = 1; 120557dacad5SJay Sternberg nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 120657dacad5SJay Sternberg nvmeq->q_depth = depth; 120757dacad5SJay Sternberg nvmeq->qid = qid; 120857dacad5SJay Sternberg nvmeq->cq_vector = -1; 120957dacad5SJay Sternberg dev->queues[qid] = nvmeq; 121057dacad5SJay Sternberg 121157dacad5SJay Sternberg /* make sure queue descriptor is set before queue count, for kthread */ 121257dacad5SJay Sternberg mb(); 121357dacad5SJay Sternberg dev->queue_count++; 121457dacad5SJay Sternberg 121557dacad5SJay Sternberg return nvmeq; 121657dacad5SJay Sternberg 121757dacad5SJay Sternberg free_cqdma: 121857dacad5SJay Sternberg dma_free_coherent(dev->dev, CQ_SIZE(depth), (void *)nvmeq->cqes, 121957dacad5SJay Sternberg nvmeq->cq_dma_addr); 122057dacad5SJay Sternberg free_nvmeq: 122157dacad5SJay Sternberg kfree(nvmeq); 122257dacad5SJay Sternberg return NULL; 122357dacad5SJay Sternberg } 122457dacad5SJay Sternberg 122557dacad5SJay Sternberg static int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 122657dacad5SJay Sternberg const char *name) 122757dacad5SJay Sternberg { 122857dacad5SJay Sternberg if (use_threaded_interrupts) 122957dacad5SJay Sternberg return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 123057dacad5SJay Sternberg nvme_irq_check, nvme_irq, IRQF_SHARED, 123157dacad5SJay Sternberg name, nvmeq); 123257dacad5SJay Sternberg return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 123357dacad5SJay Sternberg IRQF_SHARED, name, nvmeq); 123457dacad5SJay Sternberg } 123557dacad5SJay Sternberg 123657dacad5SJay Sternberg static void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid) 123757dacad5SJay Sternberg { 123857dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 123957dacad5SJay Sternberg 124057dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 124157dacad5SJay Sternberg nvmeq->sq_tail = 0; 124257dacad5SJay Sternberg nvmeq->cq_head = 0; 124357dacad5SJay Sternberg nvmeq->cq_phase = 1; 124457dacad5SJay Sternberg nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride]; 124557dacad5SJay Sternberg memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth)); 124657dacad5SJay Sternberg dev->online_queues++; 124757dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 124857dacad5SJay Sternberg } 124957dacad5SJay Sternberg 125057dacad5SJay Sternberg static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) 125157dacad5SJay Sternberg { 125257dacad5SJay Sternberg struct nvme_dev *dev = nvmeq->dev; 125357dacad5SJay Sternberg int result; 125457dacad5SJay Sternberg 125557dacad5SJay Sternberg nvmeq->cq_vector = qid - 1; 125657dacad5SJay Sternberg result = adapter_alloc_cq(dev, qid, nvmeq); 125757dacad5SJay Sternberg if (result < 0) 125857dacad5SJay Sternberg return result; 125957dacad5SJay Sternberg 126057dacad5SJay Sternberg result = adapter_alloc_sq(dev, qid, nvmeq); 126157dacad5SJay Sternberg if (result < 0) 126257dacad5SJay Sternberg goto release_cq; 126357dacad5SJay Sternberg 126457dacad5SJay Sternberg result = queue_request_irq(dev, nvmeq, nvmeq->irqname); 126557dacad5SJay Sternberg if (result < 0) 126657dacad5SJay Sternberg goto release_sq; 126757dacad5SJay Sternberg 126857dacad5SJay Sternberg nvme_init_queue(nvmeq, qid); 126957dacad5SJay Sternberg return result; 127057dacad5SJay Sternberg 127157dacad5SJay Sternberg release_sq: 127257dacad5SJay Sternberg adapter_delete_sq(dev, qid); 127357dacad5SJay Sternberg release_cq: 127457dacad5SJay Sternberg adapter_delete_cq(dev, qid); 127557dacad5SJay Sternberg return result; 127657dacad5SJay Sternberg } 127757dacad5SJay Sternberg 127857dacad5SJay Sternberg static struct blk_mq_ops nvme_mq_admin_ops = { 127957dacad5SJay Sternberg .queue_rq = nvme_queue_rq, 1280*eee417b0SChristoph Hellwig .complete = nvme_complete_rq, 128157dacad5SJay Sternberg .map_queue = blk_mq_map_queue, 128257dacad5SJay Sternberg .init_hctx = nvme_admin_init_hctx, 128357dacad5SJay Sternberg .exit_hctx = nvme_admin_exit_hctx, 128457dacad5SJay Sternberg .init_request = nvme_admin_init_request, 128557dacad5SJay Sternberg .timeout = nvme_timeout, 128657dacad5SJay Sternberg }; 128757dacad5SJay Sternberg 128857dacad5SJay Sternberg static struct blk_mq_ops nvme_mq_ops = { 128957dacad5SJay Sternberg .queue_rq = nvme_queue_rq, 1290*eee417b0SChristoph Hellwig .complete = nvme_complete_rq, 129157dacad5SJay Sternberg .map_queue = blk_mq_map_queue, 129257dacad5SJay Sternberg .init_hctx = nvme_init_hctx, 129357dacad5SJay Sternberg .init_request = nvme_init_request, 129457dacad5SJay Sternberg .timeout = nvme_timeout, 1295a0fa9647SJens Axboe .poll = nvme_poll, 129657dacad5SJay Sternberg }; 129757dacad5SJay Sternberg 129857dacad5SJay Sternberg static void nvme_dev_remove_admin(struct nvme_dev *dev) 129957dacad5SJay Sternberg { 13001c63dc66SChristoph Hellwig if (dev->ctrl.admin_q && !blk_queue_dying(dev->ctrl.admin_q)) { 13011c63dc66SChristoph Hellwig blk_cleanup_queue(dev->ctrl.admin_q); 130257dacad5SJay Sternberg blk_mq_free_tag_set(&dev->admin_tagset); 130357dacad5SJay Sternberg } 130457dacad5SJay Sternberg } 130557dacad5SJay Sternberg 130657dacad5SJay Sternberg static int nvme_alloc_admin_tags(struct nvme_dev *dev) 130757dacad5SJay Sternberg { 13081c63dc66SChristoph Hellwig if (!dev->ctrl.admin_q) { 130957dacad5SJay Sternberg dev->admin_tagset.ops = &nvme_mq_admin_ops; 131057dacad5SJay Sternberg dev->admin_tagset.nr_hw_queues = 1; 1311adf68f21SChristoph Hellwig dev->admin_tagset.queue_depth = NVME_AQ_BLKMQ_DEPTH; 131257dacad5SJay Sternberg dev->admin_tagset.timeout = ADMIN_TIMEOUT; 131357dacad5SJay Sternberg dev->admin_tagset.numa_node = dev_to_node(dev->dev); 131457dacad5SJay Sternberg dev->admin_tagset.cmd_size = nvme_cmd_size(dev); 131557dacad5SJay Sternberg dev->admin_tagset.driver_data = dev; 131657dacad5SJay Sternberg 131757dacad5SJay Sternberg if (blk_mq_alloc_tag_set(&dev->admin_tagset)) 131857dacad5SJay Sternberg return -ENOMEM; 131957dacad5SJay Sternberg 13201c63dc66SChristoph Hellwig dev->ctrl.admin_q = blk_mq_init_queue(&dev->admin_tagset); 13211c63dc66SChristoph Hellwig if (IS_ERR(dev->ctrl.admin_q)) { 132257dacad5SJay Sternberg blk_mq_free_tag_set(&dev->admin_tagset); 132357dacad5SJay Sternberg return -ENOMEM; 132457dacad5SJay Sternberg } 13251c63dc66SChristoph Hellwig if (!blk_get_queue(dev->ctrl.admin_q)) { 132657dacad5SJay Sternberg nvme_dev_remove_admin(dev); 13271c63dc66SChristoph Hellwig dev->ctrl.admin_q = NULL; 132857dacad5SJay Sternberg return -ENODEV; 132957dacad5SJay Sternberg } 133057dacad5SJay Sternberg } else 13311c63dc66SChristoph Hellwig blk_mq_unfreeze_queue(dev->ctrl.admin_q); 133257dacad5SJay Sternberg 133357dacad5SJay Sternberg return 0; 133457dacad5SJay Sternberg } 133557dacad5SJay Sternberg 133657dacad5SJay Sternberg static int nvme_configure_admin_queue(struct nvme_dev *dev) 133757dacad5SJay Sternberg { 133857dacad5SJay Sternberg int result; 133957dacad5SJay Sternberg u32 aqa; 13407a67cbeaSChristoph Hellwig u64 cap = lo_hi_readq(dev->bar + NVME_REG_CAP); 134157dacad5SJay Sternberg struct nvme_queue *nvmeq; 134257dacad5SJay Sternberg 13437a67cbeaSChristoph Hellwig dev->subsystem = readl(dev->bar + NVME_REG_VS) >= NVME_VS(1, 1) ? 134457dacad5SJay Sternberg NVME_CAP_NSSRC(cap) : 0; 134557dacad5SJay Sternberg 13467a67cbeaSChristoph Hellwig if (dev->subsystem && 13477a67cbeaSChristoph Hellwig (readl(dev->bar + NVME_REG_CSTS) & NVME_CSTS_NSSRO)) 13487a67cbeaSChristoph Hellwig writel(NVME_CSTS_NSSRO, dev->bar + NVME_REG_CSTS); 134957dacad5SJay Sternberg 13505fd4ce1bSChristoph Hellwig result = nvme_disable_ctrl(&dev->ctrl, cap); 135157dacad5SJay Sternberg if (result < 0) 135257dacad5SJay Sternberg return result; 135357dacad5SJay Sternberg 135457dacad5SJay Sternberg nvmeq = dev->queues[0]; 135557dacad5SJay Sternberg if (!nvmeq) { 135657dacad5SJay Sternberg nvmeq = nvme_alloc_queue(dev, 0, NVME_AQ_DEPTH); 135757dacad5SJay Sternberg if (!nvmeq) 135857dacad5SJay Sternberg return -ENOMEM; 135957dacad5SJay Sternberg } 136057dacad5SJay Sternberg 136157dacad5SJay Sternberg aqa = nvmeq->q_depth - 1; 136257dacad5SJay Sternberg aqa |= aqa << 16; 136357dacad5SJay Sternberg 13647a67cbeaSChristoph Hellwig writel(aqa, dev->bar + NVME_REG_AQA); 13657a67cbeaSChristoph Hellwig lo_hi_writeq(nvmeq->sq_dma_addr, dev->bar + NVME_REG_ASQ); 13667a67cbeaSChristoph Hellwig lo_hi_writeq(nvmeq->cq_dma_addr, dev->bar + NVME_REG_ACQ); 136757dacad5SJay Sternberg 13685fd4ce1bSChristoph Hellwig result = nvme_enable_ctrl(&dev->ctrl, cap); 136957dacad5SJay Sternberg if (result) 137057dacad5SJay Sternberg goto free_nvmeq; 137157dacad5SJay Sternberg 137257dacad5SJay Sternberg nvmeq->cq_vector = 0; 137357dacad5SJay Sternberg result = queue_request_irq(dev, nvmeq, nvmeq->irqname); 137457dacad5SJay Sternberg if (result) { 137557dacad5SJay Sternberg nvmeq->cq_vector = -1; 137657dacad5SJay Sternberg goto free_nvmeq; 137757dacad5SJay Sternberg } 137857dacad5SJay Sternberg 137957dacad5SJay Sternberg return result; 138057dacad5SJay Sternberg 138157dacad5SJay Sternberg free_nvmeq: 138257dacad5SJay Sternberg nvme_free_queues(dev, 0); 138357dacad5SJay Sternberg return result; 138457dacad5SJay Sternberg } 138557dacad5SJay Sternberg 138657dacad5SJay Sternberg static int nvme_kthread(void *data) 138757dacad5SJay Sternberg { 138857dacad5SJay Sternberg struct nvme_dev *dev, *next; 138957dacad5SJay Sternberg 139057dacad5SJay Sternberg while (!kthread_should_stop()) { 139157dacad5SJay Sternberg set_current_state(TASK_INTERRUPTIBLE); 139257dacad5SJay Sternberg spin_lock(&dev_list_lock); 139357dacad5SJay Sternberg list_for_each_entry_safe(dev, next, &dev_list, node) { 139457dacad5SJay Sternberg int i; 13957a67cbeaSChristoph Hellwig u32 csts = readl(dev->bar + NVME_REG_CSTS); 139657dacad5SJay Sternberg 1397846cc05fSChristoph Hellwig /* 1398846cc05fSChristoph Hellwig * Skip controllers currently under reset. 1399846cc05fSChristoph Hellwig */ 1400846cc05fSChristoph Hellwig if (work_pending(&dev->reset_work) || work_busy(&dev->reset_work)) 1401846cc05fSChristoph Hellwig continue; 1402846cc05fSChristoph Hellwig 140357dacad5SJay Sternberg if ((dev->subsystem && (csts & NVME_CSTS_NSSRO)) || 140457dacad5SJay Sternberg csts & NVME_CSTS_CFS) { 1405846cc05fSChristoph Hellwig if (queue_work(nvme_workq, &dev->reset_work)) { 140657dacad5SJay Sternberg dev_warn(dev->dev, 140757dacad5SJay Sternberg "Failed status: %x, reset controller\n", 14087a67cbeaSChristoph Hellwig readl(dev->bar + NVME_REG_CSTS)); 140957dacad5SJay Sternberg } 141057dacad5SJay Sternberg continue; 141157dacad5SJay Sternberg } 141257dacad5SJay Sternberg for (i = 0; i < dev->queue_count; i++) { 141357dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 141457dacad5SJay Sternberg if (!nvmeq) 141557dacad5SJay Sternberg continue; 141657dacad5SJay Sternberg spin_lock_irq(&nvmeq->q_lock); 141757dacad5SJay Sternberg nvme_process_cq(nvmeq); 141857dacad5SJay Sternberg 1419adf68f21SChristoph Hellwig while (i == 0 && dev->ctrl.event_limit > 0) 1420adf68f21SChristoph Hellwig nvme_submit_async_event(dev); 142157dacad5SJay Sternberg spin_unlock_irq(&nvmeq->q_lock); 142257dacad5SJay Sternberg } 142357dacad5SJay Sternberg } 142457dacad5SJay Sternberg spin_unlock(&dev_list_lock); 142557dacad5SJay Sternberg schedule_timeout(round_jiffies_relative(HZ)); 142657dacad5SJay Sternberg } 142757dacad5SJay Sternberg return 0; 142857dacad5SJay Sternberg } 142957dacad5SJay Sternberg 1430749941f2SChristoph Hellwig static int nvme_create_io_queues(struct nvme_dev *dev) 143157dacad5SJay Sternberg { 143257dacad5SJay Sternberg unsigned i; 1433749941f2SChristoph Hellwig int ret = 0; 143457dacad5SJay Sternberg 1435749941f2SChristoph Hellwig for (i = dev->queue_count; i <= dev->max_qid; i++) { 1436749941f2SChristoph Hellwig if (!nvme_alloc_queue(dev, i, dev->q_depth)) { 1437749941f2SChristoph Hellwig ret = -ENOMEM; 143857dacad5SJay Sternberg break; 1439749941f2SChristoph Hellwig } 1440749941f2SChristoph Hellwig } 144157dacad5SJay Sternberg 1442749941f2SChristoph Hellwig for (i = dev->online_queues; i <= dev->queue_count - 1; i++) { 1443749941f2SChristoph Hellwig ret = nvme_create_queue(dev->queues[i], i); 1444749941f2SChristoph Hellwig if (ret) { 144557dacad5SJay Sternberg nvme_free_queues(dev, i); 144657dacad5SJay Sternberg break; 144757dacad5SJay Sternberg } 144857dacad5SJay Sternberg } 144957dacad5SJay Sternberg 1450749941f2SChristoph Hellwig /* 1451749941f2SChristoph Hellwig * Ignore failing Create SQ/CQ commands, we can continue with less 1452749941f2SChristoph Hellwig * than the desired aount of queues, and even a controller without 1453749941f2SChristoph Hellwig * I/O queues an still be used to issue admin commands. This might 1454749941f2SChristoph Hellwig * be useful to upgrade a buggy firmware for example. 1455749941f2SChristoph Hellwig */ 1456749941f2SChristoph Hellwig return ret >= 0 ? 0 : ret; 1457749941f2SChristoph Hellwig } 1458749941f2SChristoph Hellwig 145957dacad5SJay Sternberg static void __iomem *nvme_map_cmb(struct nvme_dev *dev) 146057dacad5SJay Sternberg { 146157dacad5SJay Sternberg u64 szu, size, offset; 146257dacad5SJay Sternberg u32 cmbloc; 146357dacad5SJay Sternberg resource_size_t bar_size; 146457dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 146557dacad5SJay Sternberg void __iomem *cmb; 146657dacad5SJay Sternberg dma_addr_t dma_addr; 146757dacad5SJay Sternberg 146857dacad5SJay Sternberg if (!use_cmb_sqes) 146957dacad5SJay Sternberg return NULL; 147057dacad5SJay Sternberg 14717a67cbeaSChristoph Hellwig dev->cmbsz = readl(dev->bar + NVME_REG_CMBSZ); 147257dacad5SJay Sternberg if (!(NVME_CMB_SZ(dev->cmbsz))) 147357dacad5SJay Sternberg return NULL; 147457dacad5SJay Sternberg 14757a67cbeaSChristoph Hellwig cmbloc = readl(dev->bar + NVME_REG_CMBLOC); 147657dacad5SJay Sternberg 147757dacad5SJay Sternberg szu = (u64)1 << (12 + 4 * NVME_CMB_SZU(dev->cmbsz)); 147857dacad5SJay Sternberg size = szu * NVME_CMB_SZ(dev->cmbsz); 147957dacad5SJay Sternberg offset = szu * NVME_CMB_OFST(cmbloc); 148057dacad5SJay Sternberg bar_size = pci_resource_len(pdev, NVME_CMB_BIR(cmbloc)); 148157dacad5SJay Sternberg 148257dacad5SJay Sternberg if (offset > bar_size) 148357dacad5SJay Sternberg return NULL; 148457dacad5SJay Sternberg 148557dacad5SJay Sternberg /* 148657dacad5SJay Sternberg * Controllers may support a CMB size larger than their BAR, 148757dacad5SJay Sternberg * for example, due to being behind a bridge. Reduce the CMB to 148857dacad5SJay Sternberg * the reported size of the BAR 148957dacad5SJay Sternberg */ 149057dacad5SJay Sternberg if (size > bar_size - offset) 149157dacad5SJay Sternberg size = bar_size - offset; 149257dacad5SJay Sternberg 149357dacad5SJay Sternberg dma_addr = pci_resource_start(pdev, NVME_CMB_BIR(cmbloc)) + offset; 149457dacad5SJay Sternberg cmb = ioremap_wc(dma_addr, size); 149557dacad5SJay Sternberg if (!cmb) 149657dacad5SJay Sternberg return NULL; 149757dacad5SJay Sternberg 149857dacad5SJay Sternberg dev->cmb_dma_addr = dma_addr; 149957dacad5SJay Sternberg dev->cmb_size = size; 150057dacad5SJay Sternberg return cmb; 150157dacad5SJay Sternberg } 150257dacad5SJay Sternberg 150357dacad5SJay Sternberg static inline void nvme_release_cmb(struct nvme_dev *dev) 150457dacad5SJay Sternberg { 150557dacad5SJay Sternberg if (dev->cmb) { 150657dacad5SJay Sternberg iounmap(dev->cmb); 150757dacad5SJay Sternberg dev->cmb = NULL; 150857dacad5SJay Sternberg } 150957dacad5SJay Sternberg } 151057dacad5SJay Sternberg 151157dacad5SJay Sternberg static size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues) 151257dacad5SJay Sternberg { 151357dacad5SJay Sternberg return 4096 + ((nr_io_queues + 1) * 8 * dev->db_stride); 151457dacad5SJay Sternberg } 151557dacad5SJay Sternberg 151657dacad5SJay Sternberg static int nvme_setup_io_queues(struct nvme_dev *dev) 151757dacad5SJay Sternberg { 151857dacad5SJay Sternberg struct nvme_queue *adminq = dev->queues[0]; 151957dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 152057dacad5SJay Sternberg int result, i, vecs, nr_io_queues, size; 152157dacad5SJay Sternberg 152257dacad5SJay Sternberg nr_io_queues = num_possible_cpus(); 15239a0be7abSChristoph Hellwig result = nvme_set_queue_count(&dev->ctrl, &nr_io_queues); 15249a0be7abSChristoph Hellwig if (result < 0) 152557dacad5SJay Sternberg return result; 15269a0be7abSChristoph Hellwig 15279a0be7abSChristoph Hellwig /* 15289a0be7abSChristoph Hellwig * Degraded controllers might return an error when setting the queue 15299a0be7abSChristoph Hellwig * count. We still want to be able to bring them online and offer 15309a0be7abSChristoph Hellwig * access to the admin queue, as that might be only way to fix them up. 15319a0be7abSChristoph Hellwig */ 15329a0be7abSChristoph Hellwig if (result > 0) { 15339a0be7abSChristoph Hellwig dev_err(dev->dev, "Could not set queue count (%d)\n", result); 15349a0be7abSChristoph Hellwig nr_io_queues = 0; 15359a0be7abSChristoph Hellwig result = 0; 15369a0be7abSChristoph Hellwig } 153757dacad5SJay Sternberg 153857dacad5SJay Sternberg if (dev->cmb && NVME_CMB_SQS(dev->cmbsz)) { 153957dacad5SJay Sternberg result = nvme_cmb_qdepth(dev, nr_io_queues, 154057dacad5SJay Sternberg sizeof(struct nvme_command)); 154157dacad5SJay Sternberg if (result > 0) 154257dacad5SJay Sternberg dev->q_depth = result; 154357dacad5SJay Sternberg else 154457dacad5SJay Sternberg nvme_release_cmb(dev); 154557dacad5SJay Sternberg } 154657dacad5SJay Sternberg 154757dacad5SJay Sternberg size = db_bar_size(dev, nr_io_queues); 154857dacad5SJay Sternberg if (size > 8192) { 154957dacad5SJay Sternberg iounmap(dev->bar); 155057dacad5SJay Sternberg do { 155157dacad5SJay Sternberg dev->bar = ioremap(pci_resource_start(pdev, 0), size); 155257dacad5SJay Sternberg if (dev->bar) 155357dacad5SJay Sternberg break; 155457dacad5SJay Sternberg if (!--nr_io_queues) 155557dacad5SJay Sternberg return -ENOMEM; 155657dacad5SJay Sternberg size = db_bar_size(dev, nr_io_queues); 155757dacad5SJay Sternberg } while (1); 15587a67cbeaSChristoph Hellwig dev->dbs = dev->bar + 4096; 155957dacad5SJay Sternberg adminq->q_db = dev->dbs; 156057dacad5SJay Sternberg } 156157dacad5SJay Sternberg 156257dacad5SJay Sternberg /* Deregister the admin queue's interrupt */ 156357dacad5SJay Sternberg free_irq(dev->entry[0].vector, adminq); 156457dacad5SJay Sternberg 156557dacad5SJay Sternberg /* 156657dacad5SJay Sternberg * If we enable msix early due to not intx, disable it again before 156757dacad5SJay Sternberg * setting up the full range we need. 156857dacad5SJay Sternberg */ 156957dacad5SJay Sternberg if (!pdev->irq) 157057dacad5SJay Sternberg pci_disable_msix(pdev); 157157dacad5SJay Sternberg 157257dacad5SJay Sternberg for (i = 0; i < nr_io_queues; i++) 157357dacad5SJay Sternberg dev->entry[i].entry = i; 157457dacad5SJay Sternberg vecs = pci_enable_msix_range(pdev, dev->entry, 1, nr_io_queues); 157557dacad5SJay Sternberg if (vecs < 0) { 157657dacad5SJay Sternberg vecs = pci_enable_msi_range(pdev, 1, min(nr_io_queues, 32)); 157757dacad5SJay Sternberg if (vecs < 0) { 157857dacad5SJay Sternberg vecs = 1; 157957dacad5SJay Sternberg } else { 158057dacad5SJay Sternberg for (i = 0; i < vecs; i++) 158157dacad5SJay Sternberg dev->entry[i].vector = i + pdev->irq; 158257dacad5SJay Sternberg } 158357dacad5SJay Sternberg } 158457dacad5SJay Sternberg 158557dacad5SJay Sternberg /* 158657dacad5SJay Sternberg * Should investigate if there's a performance win from allocating 158757dacad5SJay Sternberg * more queues than interrupt vectors; it might allow the submission 158857dacad5SJay Sternberg * path to scale better, even if the receive path is limited by the 158957dacad5SJay Sternberg * number of interrupts. 159057dacad5SJay Sternberg */ 159157dacad5SJay Sternberg nr_io_queues = vecs; 159257dacad5SJay Sternberg dev->max_qid = nr_io_queues; 159357dacad5SJay Sternberg 159457dacad5SJay Sternberg result = queue_request_irq(dev, adminq, adminq->irqname); 159557dacad5SJay Sternberg if (result) { 159657dacad5SJay Sternberg adminq->cq_vector = -1; 159757dacad5SJay Sternberg goto free_queues; 159857dacad5SJay Sternberg } 159957dacad5SJay Sternberg 160057dacad5SJay Sternberg /* Free previously allocated queues that are no longer usable */ 160157dacad5SJay Sternberg nvme_free_queues(dev, nr_io_queues + 1); 1602749941f2SChristoph Hellwig return nvme_create_io_queues(dev); 160357dacad5SJay Sternberg 160457dacad5SJay Sternberg free_queues: 160557dacad5SJay Sternberg nvme_free_queues(dev, 1); 160657dacad5SJay Sternberg return result; 160757dacad5SJay Sternberg } 160857dacad5SJay Sternberg 160957dacad5SJay Sternberg static void nvme_set_irq_hints(struct nvme_dev *dev) 161057dacad5SJay Sternberg { 161157dacad5SJay Sternberg struct nvme_queue *nvmeq; 161257dacad5SJay Sternberg int i; 161357dacad5SJay Sternberg 161457dacad5SJay Sternberg for (i = 0; i < dev->online_queues; i++) { 161557dacad5SJay Sternberg nvmeq = dev->queues[i]; 161657dacad5SJay Sternberg 161757dacad5SJay Sternberg if (!nvmeq->tags || !(*nvmeq->tags)) 161857dacad5SJay Sternberg continue; 161957dacad5SJay Sternberg 162057dacad5SJay Sternberg irq_set_affinity_hint(dev->entry[nvmeq->cq_vector].vector, 162157dacad5SJay Sternberg blk_mq_tags_cpumask(*nvmeq->tags)); 162257dacad5SJay Sternberg } 162357dacad5SJay Sternberg } 162457dacad5SJay Sternberg 162557dacad5SJay Sternberg static void nvme_dev_scan(struct work_struct *work) 162657dacad5SJay Sternberg { 162757dacad5SJay Sternberg struct nvme_dev *dev = container_of(work, struct nvme_dev, scan_work); 162857dacad5SJay Sternberg 162957dacad5SJay Sternberg if (!dev->tagset.tags) 163057dacad5SJay Sternberg return; 16315bae7f73SChristoph Hellwig nvme_scan_namespaces(&dev->ctrl); 163257dacad5SJay Sternberg nvme_set_irq_hints(dev); 163357dacad5SJay Sternberg } 163457dacad5SJay Sternberg 163557dacad5SJay Sternberg /* 163657dacad5SJay Sternberg * Return: error value if an error occurred setting up the queues or calling 163757dacad5SJay Sternberg * Identify Device. 0 if these succeeded, even if adding some of the 163857dacad5SJay Sternberg * namespaces failed. At the moment, these failures are silent. TBD which 163957dacad5SJay Sternberg * failures should be reported. 164057dacad5SJay Sternberg */ 164157dacad5SJay Sternberg static int nvme_dev_add(struct nvme_dev *dev) 164257dacad5SJay Sternberg { 16435bae7f73SChristoph Hellwig if (!dev->ctrl.tagset) { 164457dacad5SJay Sternberg dev->tagset.ops = &nvme_mq_ops; 164557dacad5SJay Sternberg dev->tagset.nr_hw_queues = dev->online_queues - 1; 164657dacad5SJay Sternberg dev->tagset.timeout = NVME_IO_TIMEOUT; 164757dacad5SJay Sternberg dev->tagset.numa_node = dev_to_node(dev->dev); 164857dacad5SJay Sternberg dev->tagset.queue_depth = 164957dacad5SJay Sternberg min_t(int, dev->q_depth, BLK_MQ_MAX_DEPTH) - 1; 165057dacad5SJay Sternberg dev->tagset.cmd_size = nvme_cmd_size(dev); 165157dacad5SJay Sternberg dev->tagset.flags = BLK_MQ_F_SHOULD_MERGE; 165257dacad5SJay Sternberg dev->tagset.driver_data = dev; 165357dacad5SJay Sternberg 165457dacad5SJay Sternberg if (blk_mq_alloc_tag_set(&dev->tagset)) 165557dacad5SJay Sternberg return 0; 16565bae7f73SChristoph Hellwig dev->ctrl.tagset = &dev->tagset; 165757dacad5SJay Sternberg } 165892f7a162SKeith Busch queue_work(nvme_workq, &dev->scan_work); 165957dacad5SJay Sternberg return 0; 166057dacad5SJay Sternberg } 166157dacad5SJay Sternberg 166257dacad5SJay Sternberg static int nvme_dev_map(struct nvme_dev *dev) 166357dacad5SJay Sternberg { 166457dacad5SJay Sternberg u64 cap; 166557dacad5SJay Sternberg int bars, result = -ENOMEM; 166657dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 166757dacad5SJay Sternberg 166857dacad5SJay Sternberg if (pci_enable_device_mem(pdev)) 166957dacad5SJay Sternberg return result; 167057dacad5SJay Sternberg 167157dacad5SJay Sternberg dev->entry[0].vector = pdev->irq; 167257dacad5SJay Sternberg pci_set_master(pdev); 167357dacad5SJay Sternberg bars = pci_select_bars(pdev, IORESOURCE_MEM); 167457dacad5SJay Sternberg if (!bars) 167557dacad5SJay Sternberg goto disable_pci; 167657dacad5SJay Sternberg 167757dacad5SJay Sternberg if (pci_request_selected_regions(pdev, bars, "nvme")) 167857dacad5SJay Sternberg goto disable_pci; 167957dacad5SJay Sternberg 168057dacad5SJay Sternberg if (dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(64)) && 168157dacad5SJay Sternberg dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(32))) 168257dacad5SJay Sternberg goto disable; 168357dacad5SJay Sternberg 168457dacad5SJay Sternberg dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 168557dacad5SJay Sternberg if (!dev->bar) 168657dacad5SJay Sternberg goto disable; 168757dacad5SJay Sternberg 16887a67cbeaSChristoph Hellwig if (readl(dev->bar + NVME_REG_CSTS) == -1) { 168957dacad5SJay Sternberg result = -ENODEV; 169057dacad5SJay Sternberg goto unmap; 169157dacad5SJay Sternberg } 169257dacad5SJay Sternberg 169357dacad5SJay Sternberg /* 169457dacad5SJay Sternberg * Some devices don't advertse INTx interrupts, pre-enable a single 169557dacad5SJay Sternberg * MSIX vec for setup. We'll adjust this later. 169657dacad5SJay Sternberg */ 169757dacad5SJay Sternberg if (!pdev->irq) { 169857dacad5SJay Sternberg result = pci_enable_msix(pdev, dev->entry, 1); 169957dacad5SJay Sternberg if (result < 0) 170057dacad5SJay Sternberg goto unmap; 170157dacad5SJay Sternberg } 170257dacad5SJay Sternberg 17037a67cbeaSChristoph Hellwig cap = lo_hi_readq(dev->bar + NVME_REG_CAP); 17047a67cbeaSChristoph Hellwig 170557dacad5SJay Sternberg dev->q_depth = min_t(int, NVME_CAP_MQES(cap) + 1, NVME_Q_DEPTH); 170657dacad5SJay Sternberg dev->db_stride = 1 << NVME_CAP_STRIDE(cap); 17077a67cbeaSChristoph Hellwig dev->dbs = dev->bar + 4096; 17087a67cbeaSChristoph Hellwig if (readl(dev->bar + NVME_REG_VS) >= NVME_VS(1, 2)) 170957dacad5SJay Sternberg dev->cmb = nvme_map_cmb(dev); 171057dacad5SJay Sternberg 171157dacad5SJay Sternberg return 0; 171257dacad5SJay Sternberg 171357dacad5SJay Sternberg unmap: 171457dacad5SJay Sternberg iounmap(dev->bar); 171557dacad5SJay Sternberg dev->bar = NULL; 171657dacad5SJay Sternberg disable: 171757dacad5SJay Sternberg pci_release_regions(pdev); 171857dacad5SJay Sternberg disable_pci: 171957dacad5SJay Sternberg pci_disable_device(pdev); 172057dacad5SJay Sternberg return result; 172157dacad5SJay Sternberg } 172257dacad5SJay Sternberg 172357dacad5SJay Sternberg static void nvme_dev_unmap(struct nvme_dev *dev) 172457dacad5SJay Sternberg { 172557dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 172657dacad5SJay Sternberg 172757dacad5SJay Sternberg if (pdev->msi_enabled) 172857dacad5SJay Sternberg pci_disable_msi(pdev); 172957dacad5SJay Sternberg else if (pdev->msix_enabled) 173057dacad5SJay Sternberg pci_disable_msix(pdev); 173157dacad5SJay Sternberg 173257dacad5SJay Sternberg if (dev->bar) { 173357dacad5SJay Sternberg iounmap(dev->bar); 173457dacad5SJay Sternberg dev->bar = NULL; 173557dacad5SJay Sternberg pci_release_regions(pdev); 173657dacad5SJay Sternberg } 173757dacad5SJay Sternberg 173857dacad5SJay Sternberg if (pci_is_enabled(pdev)) 173957dacad5SJay Sternberg pci_disable_device(pdev); 174057dacad5SJay Sternberg } 174157dacad5SJay Sternberg 174257dacad5SJay Sternberg struct nvme_delq_ctx { 174357dacad5SJay Sternberg struct task_struct *waiter; 174457dacad5SJay Sternberg struct kthread_worker *worker; 174557dacad5SJay Sternberg atomic_t refcount; 174657dacad5SJay Sternberg }; 174757dacad5SJay Sternberg 174857dacad5SJay Sternberg static void nvme_wait_dq(struct nvme_delq_ctx *dq, struct nvme_dev *dev) 174957dacad5SJay Sternberg { 175057dacad5SJay Sternberg dq->waiter = current; 175157dacad5SJay Sternberg mb(); 175257dacad5SJay Sternberg 175357dacad5SJay Sternberg for (;;) { 175457dacad5SJay Sternberg set_current_state(TASK_KILLABLE); 175557dacad5SJay Sternberg if (!atomic_read(&dq->refcount)) 175657dacad5SJay Sternberg break; 175757dacad5SJay Sternberg if (!schedule_timeout(ADMIN_TIMEOUT) || 175857dacad5SJay Sternberg fatal_signal_pending(current)) { 175957dacad5SJay Sternberg /* 176057dacad5SJay Sternberg * Disable the controller first since we can't trust it 176157dacad5SJay Sternberg * at this point, but leave the admin queue enabled 176257dacad5SJay Sternberg * until all queue deletion requests are flushed. 176357dacad5SJay Sternberg * FIXME: This may take a while if there are more h/w 176457dacad5SJay Sternberg * queues than admin tags. 176557dacad5SJay Sternberg */ 176657dacad5SJay Sternberg set_current_state(TASK_RUNNING); 17675fd4ce1bSChristoph Hellwig nvme_disable_ctrl(&dev->ctrl, 17687a67cbeaSChristoph Hellwig lo_hi_readq(dev->bar + NVME_REG_CAP)); 176957dacad5SJay Sternberg nvme_clear_queue(dev->queues[0]); 177057dacad5SJay Sternberg flush_kthread_worker(dq->worker); 177157dacad5SJay Sternberg nvme_disable_queue(dev, 0); 177257dacad5SJay Sternberg return; 177357dacad5SJay Sternberg } 177457dacad5SJay Sternberg } 177557dacad5SJay Sternberg set_current_state(TASK_RUNNING); 177657dacad5SJay Sternberg } 177757dacad5SJay Sternberg 177857dacad5SJay Sternberg static void nvme_put_dq(struct nvme_delq_ctx *dq) 177957dacad5SJay Sternberg { 178057dacad5SJay Sternberg atomic_dec(&dq->refcount); 178157dacad5SJay Sternberg if (dq->waiter) 178257dacad5SJay Sternberg wake_up_process(dq->waiter); 178357dacad5SJay Sternberg } 178457dacad5SJay Sternberg 178557dacad5SJay Sternberg static struct nvme_delq_ctx *nvme_get_dq(struct nvme_delq_ctx *dq) 178657dacad5SJay Sternberg { 178757dacad5SJay Sternberg atomic_inc(&dq->refcount); 178857dacad5SJay Sternberg return dq; 178957dacad5SJay Sternberg } 179057dacad5SJay Sternberg 179157dacad5SJay Sternberg static void nvme_del_queue_end(struct nvme_queue *nvmeq) 179257dacad5SJay Sternberg { 179357dacad5SJay Sternberg struct nvme_delq_ctx *dq = nvmeq->cmdinfo.ctx; 179457dacad5SJay Sternberg nvme_put_dq(dq); 1795604e8c8dSKeith Busch 1796604e8c8dSKeith Busch spin_lock_irq(&nvmeq->q_lock); 1797604e8c8dSKeith Busch nvme_process_cq(nvmeq); 1798604e8c8dSKeith Busch spin_unlock_irq(&nvmeq->q_lock); 179957dacad5SJay Sternberg } 180057dacad5SJay Sternberg 180157dacad5SJay Sternberg static int adapter_async_del_queue(struct nvme_queue *nvmeq, u8 opcode, 180257dacad5SJay Sternberg kthread_work_func_t fn) 180357dacad5SJay Sternberg { 1804d8f32166SChristoph Hellwig struct request *req; 180557dacad5SJay Sternberg struct nvme_command c; 180657dacad5SJay Sternberg 180757dacad5SJay Sternberg memset(&c, 0, sizeof(c)); 180857dacad5SJay Sternberg c.delete_queue.opcode = opcode; 180957dacad5SJay Sternberg c.delete_queue.qid = cpu_to_le16(nvmeq->qid); 181057dacad5SJay Sternberg 181157dacad5SJay Sternberg init_kthread_work(&nvmeq->cmdinfo.work, fn); 1812d8f32166SChristoph Hellwig 1813d8f32166SChristoph Hellwig req = nvme_alloc_request(nvmeq->dev->ctrl.admin_q, &c, 0); 1814d8f32166SChristoph Hellwig if (IS_ERR(req)) 1815d8f32166SChristoph Hellwig return PTR_ERR(req); 1816d8f32166SChristoph Hellwig 1817d8f32166SChristoph Hellwig req->timeout = ADMIN_TIMEOUT; 1818d8f32166SChristoph Hellwig req->end_io_data = &nvmeq->cmdinfo; 1819d8f32166SChristoph Hellwig blk_execute_rq_nowait(req->q, NULL, req, 0, async_cmd_info_endio); 1820d8f32166SChristoph Hellwig return 0; 182157dacad5SJay Sternberg } 182257dacad5SJay Sternberg 182357dacad5SJay Sternberg static void nvme_del_cq_work_handler(struct kthread_work *work) 182457dacad5SJay Sternberg { 182557dacad5SJay Sternberg struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 182657dacad5SJay Sternberg cmdinfo.work); 182757dacad5SJay Sternberg nvme_del_queue_end(nvmeq); 182857dacad5SJay Sternberg } 182957dacad5SJay Sternberg 183057dacad5SJay Sternberg static int nvme_delete_cq(struct nvme_queue *nvmeq) 183157dacad5SJay Sternberg { 183257dacad5SJay Sternberg return adapter_async_del_queue(nvmeq, nvme_admin_delete_cq, 183357dacad5SJay Sternberg nvme_del_cq_work_handler); 183457dacad5SJay Sternberg } 183557dacad5SJay Sternberg 183657dacad5SJay Sternberg static void nvme_del_sq_work_handler(struct kthread_work *work) 183757dacad5SJay Sternberg { 183857dacad5SJay Sternberg struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 183957dacad5SJay Sternberg cmdinfo.work); 184057dacad5SJay Sternberg int status = nvmeq->cmdinfo.status; 184157dacad5SJay Sternberg 184257dacad5SJay Sternberg if (!status) 184357dacad5SJay Sternberg status = nvme_delete_cq(nvmeq); 184457dacad5SJay Sternberg if (status) 184557dacad5SJay Sternberg nvme_del_queue_end(nvmeq); 184657dacad5SJay Sternberg } 184757dacad5SJay Sternberg 184857dacad5SJay Sternberg static int nvme_delete_sq(struct nvme_queue *nvmeq) 184957dacad5SJay Sternberg { 185057dacad5SJay Sternberg return adapter_async_del_queue(nvmeq, nvme_admin_delete_sq, 185157dacad5SJay Sternberg nvme_del_sq_work_handler); 185257dacad5SJay Sternberg } 185357dacad5SJay Sternberg 185457dacad5SJay Sternberg static void nvme_del_queue_start(struct kthread_work *work) 185557dacad5SJay Sternberg { 185657dacad5SJay Sternberg struct nvme_queue *nvmeq = container_of(work, struct nvme_queue, 185757dacad5SJay Sternberg cmdinfo.work); 185857dacad5SJay Sternberg if (nvme_delete_sq(nvmeq)) 185957dacad5SJay Sternberg nvme_del_queue_end(nvmeq); 186057dacad5SJay Sternberg } 186157dacad5SJay Sternberg 186257dacad5SJay Sternberg static void nvme_disable_io_queues(struct nvme_dev *dev) 186357dacad5SJay Sternberg { 186457dacad5SJay Sternberg int i; 186557dacad5SJay Sternberg DEFINE_KTHREAD_WORKER_ONSTACK(worker); 186657dacad5SJay Sternberg struct nvme_delq_ctx dq; 186757dacad5SJay Sternberg struct task_struct *kworker_task = kthread_run(kthread_worker_fn, 18681c63dc66SChristoph Hellwig &worker, "nvme%d", dev->ctrl.instance); 186957dacad5SJay Sternberg 187057dacad5SJay Sternberg if (IS_ERR(kworker_task)) { 187157dacad5SJay Sternberg dev_err(dev->dev, 187257dacad5SJay Sternberg "Failed to create queue del task\n"); 187357dacad5SJay Sternberg for (i = dev->queue_count - 1; i > 0; i--) 187457dacad5SJay Sternberg nvme_disable_queue(dev, i); 187557dacad5SJay Sternberg return; 187657dacad5SJay Sternberg } 187757dacad5SJay Sternberg 187857dacad5SJay Sternberg dq.waiter = NULL; 187957dacad5SJay Sternberg atomic_set(&dq.refcount, 0); 188057dacad5SJay Sternberg dq.worker = &worker; 188157dacad5SJay Sternberg for (i = dev->queue_count - 1; i > 0; i--) { 188257dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 188357dacad5SJay Sternberg 188457dacad5SJay Sternberg if (nvme_suspend_queue(nvmeq)) 188557dacad5SJay Sternberg continue; 188657dacad5SJay Sternberg nvmeq->cmdinfo.ctx = nvme_get_dq(&dq); 188757dacad5SJay Sternberg nvmeq->cmdinfo.worker = dq.worker; 188857dacad5SJay Sternberg init_kthread_work(&nvmeq->cmdinfo.work, nvme_del_queue_start); 188957dacad5SJay Sternberg queue_kthread_work(dq.worker, &nvmeq->cmdinfo.work); 189057dacad5SJay Sternberg } 189157dacad5SJay Sternberg nvme_wait_dq(&dq, dev); 189257dacad5SJay Sternberg kthread_stop(kworker_task); 189357dacad5SJay Sternberg } 189457dacad5SJay Sternberg 18957385014cSChristoph Hellwig static int nvme_dev_list_add(struct nvme_dev *dev) 18967385014cSChristoph Hellwig { 18977385014cSChristoph Hellwig bool start_thread = false; 18987385014cSChristoph Hellwig 18997385014cSChristoph Hellwig spin_lock(&dev_list_lock); 19007385014cSChristoph Hellwig if (list_empty(&dev_list) && IS_ERR_OR_NULL(nvme_thread)) { 19017385014cSChristoph Hellwig start_thread = true; 19027385014cSChristoph Hellwig nvme_thread = NULL; 19037385014cSChristoph Hellwig } 19047385014cSChristoph Hellwig list_add(&dev->node, &dev_list); 19057385014cSChristoph Hellwig spin_unlock(&dev_list_lock); 19067385014cSChristoph Hellwig 19077385014cSChristoph Hellwig if (start_thread) { 19087385014cSChristoph Hellwig nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 19097385014cSChristoph Hellwig wake_up_all(&nvme_kthread_wait); 19107385014cSChristoph Hellwig } else 19117385014cSChristoph Hellwig wait_event_killable(nvme_kthread_wait, nvme_thread); 19127385014cSChristoph Hellwig 19137385014cSChristoph Hellwig if (IS_ERR_OR_NULL(nvme_thread)) 19147385014cSChristoph Hellwig return nvme_thread ? PTR_ERR(nvme_thread) : -EINTR; 19157385014cSChristoph Hellwig 19167385014cSChristoph Hellwig return 0; 19177385014cSChristoph Hellwig } 19187385014cSChristoph Hellwig 191957dacad5SJay Sternberg /* 192057dacad5SJay Sternberg * Remove the node from the device list and check 192157dacad5SJay Sternberg * for whether or not we need to stop the nvme_thread. 192257dacad5SJay Sternberg */ 192357dacad5SJay Sternberg static void nvme_dev_list_remove(struct nvme_dev *dev) 192457dacad5SJay Sternberg { 192557dacad5SJay Sternberg struct task_struct *tmp = NULL; 192657dacad5SJay Sternberg 192757dacad5SJay Sternberg spin_lock(&dev_list_lock); 192857dacad5SJay Sternberg list_del_init(&dev->node); 192957dacad5SJay Sternberg if (list_empty(&dev_list) && !IS_ERR_OR_NULL(nvme_thread)) { 193057dacad5SJay Sternberg tmp = nvme_thread; 193157dacad5SJay Sternberg nvme_thread = NULL; 193257dacad5SJay Sternberg } 193357dacad5SJay Sternberg spin_unlock(&dev_list_lock); 193457dacad5SJay Sternberg 193557dacad5SJay Sternberg if (tmp) 193657dacad5SJay Sternberg kthread_stop(tmp); 193757dacad5SJay Sternberg } 193857dacad5SJay Sternberg 193957dacad5SJay Sternberg static void nvme_freeze_queues(struct nvme_dev *dev) 194057dacad5SJay Sternberg { 194157dacad5SJay Sternberg struct nvme_ns *ns; 194257dacad5SJay Sternberg 19435bae7f73SChristoph Hellwig list_for_each_entry(ns, &dev->ctrl.namespaces, list) { 194457dacad5SJay Sternberg blk_mq_freeze_queue_start(ns->queue); 194557dacad5SJay Sternberg 194657dacad5SJay Sternberg spin_lock_irq(ns->queue->queue_lock); 194757dacad5SJay Sternberg queue_flag_set(QUEUE_FLAG_STOPPED, ns->queue); 194857dacad5SJay Sternberg spin_unlock_irq(ns->queue->queue_lock); 194957dacad5SJay Sternberg 195057dacad5SJay Sternberg blk_mq_cancel_requeue_work(ns->queue); 195157dacad5SJay Sternberg blk_mq_stop_hw_queues(ns->queue); 195257dacad5SJay Sternberg } 195357dacad5SJay Sternberg } 195457dacad5SJay Sternberg 195557dacad5SJay Sternberg static void nvme_unfreeze_queues(struct nvme_dev *dev) 195657dacad5SJay Sternberg { 195757dacad5SJay Sternberg struct nvme_ns *ns; 195857dacad5SJay Sternberg 19595bae7f73SChristoph Hellwig list_for_each_entry(ns, &dev->ctrl.namespaces, list) { 196057dacad5SJay Sternberg queue_flag_clear_unlocked(QUEUE_FLAG_STOPPED, ns->queue); 196157dacad5SJay Sternberg blk_mq_unfreeze_queue(ns->queue); 196257dacad5SJay Sternberg blk_mq_start_stopped_hw_queues(ns->queue, true); 196357dacad5SJay Sternberg blk_mq_kick_requeue_list(ns->queue); 196457dacad5SJay Sternberg } 196557dacad5SJay Sternberg } 196657dacad5SJay Sternberg 196757dacad5SJay Sternberg static void nvme_dev_shutdown(struct nvme_dev *dev) 196857dacad5SJay Sternberg { 196957dacad5SJay Sternberg int i; 197057dacad5SJay Sternberg u32 csts = -1; 197157dacad5SJay Sternberg 197257dacad5SJay Sternberg nvme_dev_list_remove(dev); 197357dacad5SJay Sternberg 197477bf25eaSKeith Busch mutex_lock(&dev->shutdown_lock); 197557dacad5SJay Sternberg if (dev->bar) { 197657dacad5SJay Sternberg nvme_freeze_queues(dev); 19777a67cbeaSChristoph Hellwig csts = readl(dev->bar + NVME_REG_CSTS); 197857dacad5SJay Sternberg } 197957dacad5SJay Sternberg if (csts & NVME_CSTS_CFS || !(csts & NVME_CSTS_RDY)) { 198057dacad5SJay Sternberg for (i = dev->queue_count - 1; i >= 0; i--) { 198157dacad5SJay Sternberg struct nvme_queue *nvmeq = dev->queues[i]; 198257dacad5SJay Sternberg nvme_suspend_queue(nvmeq); 198357dacad5SJay Sternberg } 198457dacad5SJay Sternberg } else { 198557dacad5SJay Sternberg nvme_disable_io_queues(dev); 19865fd4ce1bSChristoph Hellwig nvme_shutdown_ctrl(&dev->ctrl); 198757dacad5SJay Sternberg nvme_disable_queue(dev, 0); 198857dacad5SJay Sternberg } 198957dacad5SJay Sternberg nvme_dev_unmap(dev); 199057dacad5SJay Sternberg 199157dacad5SJay Sternberg for (i = dev->queue_count - 1; i >= 0; i--) 199257dacad5SJay Sternberg nvme_clear_queue(dev->queues[i]); 199377bf25eaSKeith Busch mutex_unlock(&dev->shutdown_lock); 199457dacad5SJay Sternberg } 199557dacad5SJay Sternberg 199657dacad5SJay Sternberg static int nvme_setup_prp_pools(struct nvme_dev *dev) 199757dacad5SJay Sternberg { 199857dacad5SJay Sternberg dev->prp_page_pool = dma_pool_create("prp list page", dev->dev, 199957dacad5SJay Sternberg PAGE_SIZE, PAGE_SIZE, 0); 200057dacad5SJay Sternberg if (!dev->prp_page_pool) 200157dacad5SJay Sternberg return -ENOMEM; 200257dacad5SJay Sternberg 200357dacad5SJay Sternberg /* Optimisation for I/Os between 4k and 128k */ 200457dacad5SJay Sternberg dev->prp_small_pool = dma_pool_create("prp list 256", dev->dev, 200557dacad5SJay Sternberg 256, 256, 0); 200657dacad5SJay Sternberg if (!dev->prp_small_pool) { 200757dacad5SJay Sternberg dma_pool_destroy(dev->prp_page_pool); 200857dacad5SJay Sternberg return -ENOMEM; 200957dacad5SJay Sternberg } 201057dacad5SJay Sternberg return 0; 201157dacad5SJay Sternberg } 201257dacad5SJay Sternberg 201357dacad5SJay Sternberg static void nvme_release_prp_pools(struct nvme_dev *dev) 201457dacad5SJay Sternberg { 201557dacad5SJay Sternberg dma_pool_destroy(dev->prp_page_pool); 201657dacad5SJay Sternberg dma_pool_destroy(dev->prp_small_pool); 201757dacad5SJay Sternberg } 201857dacad5SJay Sternberg 20191673f1f0SChristoph Hellwig static void nvme_pci_free_ctrl(struct nvme_ctrl *ctrl) 202057dacad5SJay Sternberg { 20211673f1f0SChristoph Hellwig struct nvme_dev *dev = to_nvme_dev(ctrl); 202257dacad5SJay Sternberg 202357dacad5SJay Sternberg put_device(dev->dev); 202457dacad5SJay Sternberg if (dev->tagset.tags) 202557dacad5SJay Sternberg blk_mq_free_tag_set(&dev->tagset); 20261c63dc66SChristoph Hellwig if (dev->ctrl.admin_q) 20271c63dc66SChristoph Hellwig blk_put_queue(dev->ctrl.admin_q); 202857dacad5SJay Sternberg kfree(dev->queues); 202957dacad5SJay Sternberg kfree(dev->entry); 203057dacad5SJay Sternberg kfree(dev); 203157dacad5SJay Sternberg } 203257dacad5SJay Sternberg 2033fd634f41SChristoph Hellwig static void nvme_reset_work(struct work_struct *work) 203457dacad5SJay Sternberg { 2035fd634f41SChristoph Hellwig struct nvme_dev *dev = container_of(work, struct nvme_dev, reset_work); 203657dacad5SJay Sternberg int result; 203757dacad5SJay Sternberg 2038fd634f41SChristoph Hellwig if (WARN_ON(test_bit(NVME_CTRL_RESETTING, &dev->flags))) 2039fd634f41SChristoph Hellwig goto out; 2040fd634f41SChristoph Hellwig 2041fd634f41SChristoph Hellwig /* 2042fd634f41SChristoph Hellwig * If we're called to reset a live controller first shut it down before 2043fd634f41SChristoph Hellwig * moving on. 2044fd634f41SChristoph Hellwig */ 2045fd634f41SChristoph Hellwig if (dev->bar) 2046fd634f41SChristoph Hellwig nvme_dev_shutdown(dev); 2047fd634f41SChristoph Hellwig 2048fd634f41SChristoph Hellwig set_bit(NVME_CTRL_RESETTING, &dev->flags); 2049fd634f41SChristoph Hellwig 205057dacad5SJay Sternberg result = nvme_dev_map(dev); 205157dacad5SJay Sternberg if (result) 205257dacad5SJay Sternberg goto out; 205357dacad5SJay Sternberg 205457dacad5SJay Sternberg result = nvme_configure_admin_queue(dev); 205557dacad5SJay Sternberg if (result) 205657dacad5SJay Sternberg goto unmap; 205757dacad5SJay Sternberg 205857dacad5SJay Sternberg nvme_init_queue(dev->queues[0], 0); 205957dacad5SJay Sternberg result = nvme_alloc_admin_tags(dev); 206057dacad5SJay Sternberg if (result) 206157dacad5SJay Sternberg goto disable; 206257dacad5SJay Sternberg 2063ce4541f4SChristoph Hellwig result = nvme_init_identify(&dev->ctrl); 2064ce4541f4SChristoph Hellwig if (result) 2065ce4541f4SChristoph Hellwig goto free_tags; 2066ce4541f4SChristoph Hellwig 206757dacad5SJay Sternberg result = nvme_setup_io_queues(dev); 206857dacad5SJay Sternberg if (result) 206957dacad5SJay Sternberg goto free_tags; 207057dacad5SJay Sternberg 2071adf68f21SChristoph Hellwig dev->ctrl.event_limit = NVME_NR_AEN_COMMANDS; 207257dacad5SJay Sternberg 20737385014cSChristoph Hellwig result = nvme_dev_list_add(dev); 20747385014cSChristoph Hellwig if (result) 20757385014cSChristoph Hellwig goto remove; 20767385014cSChristoph Hellwig 207757dacad5SJay Sternberg /* 207857dacad5SJay Sternberg * Keep the controller around but remove all namespaces if we don't have 207957dacad5SJay Sternberg * any working I/O queue. 208057dacad5SJay Sternberg */ 208157dacad5SJay Sternberg if (dev->online_queues < 2) { 208257dacad5SJay Sternberg dev_warn(dev->dev, "IO queues not created\n"); 20835bae7f73SChristoph Hellwig nvme_remove_namespaces(&dev->ctrl); 208457dacad5SJay Sternberg } else { 208557dacad5SJay Sternberg nvme_unfreeze_queues(dev); 208657dacad5SJay Sternberg nvme_dev_add(dev); 208757dacad5SJay Sternberg } 208857dacad5SJay Sternberg 2089fd634f41SChristoph Hellwig clear_bit(NVME_CTRL_RESETTING, &dev->flags); 209057dacad5SJay Sternberg return; 209157dacad5SJay Sternberg 20927385014cSChristoph Hellwig remove: 20937385014cSChristoph Hellwig nvme_dev_list_remove(dev); 209457dacad5SJay Sternberg free_tags: 209557dacad5SJay Sternberg nvme_dev_remove_admin(dev); 20961c63dc66SChristoph Hellwig blk_put_queue(dev->ctrl.admin_q); 20971c63dc66SChristoph Hellwig dev->ctrl.admin_q = NULL; 209857dacad5SJay Sternberg dev->queues[0]->tags = NULL; 209957dacad5SJay Sternberg disable: 210057dacad5SJay Sternberg nvme_disable_queue(dev, 0); 210157dacad5SJay Sternberg unmap: 210257dacad5SJay Sternberg nvme_dev_unmap(dev); 210357dacad5SJay Sternberg out: 21045c8809e6SChristoph Hellwig nvme_remove_dead_ctrl(dev); 210557dacad5SJay Sternberg } 210657dacad5SJay Sternberg 21075c8809e6SChristoph Hellwig static void nvme_remove_dead_ctrl_work(struct work_struct *work) 210857dacad5SJay Sternberg { 21095c8809e6SChristoph Hellwig struct nvme_dev *dev = container_of(work, struct nvme_dev, remove_work); 211057dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev->dev); 211157dacad5SJay Sternberg 211257dacad5SJay Sternberg if (pci_get_drvdata(pdev)) 211357dacad5SJay Sternberg pci_stop_and_remove_bus_device_locked(pdev); 21141673f1f0SChristoph Hellwig nvme_put_ctrl(&dev->ctrl); 211557dacad5SJay Sternberg } 211657dacad5SJay Sternberg 21175c8809e6SChristoph Hellwig static void nvme_remove_dead_ctrl(struct nvme_dev *dev) 211857dacad5SJay Sternberg { 21195c8809e6SChristoph Hellwig dev_warn(dev->dev, "Removing after probe failure\n"); 21201673f1f0SChristoph Hellwig kref_get(&dev->ctrl.kref); 21215c8809e6SChristoph Hellwig if (!schedule_work(&dev->remove_work)) 21221673f1f0SChristoph Hellwig nvme_put_ctrl(&dev->ctrl); 212357dacad5SJay Sternberg } 212457dacad5SJay Sternberg 212557dacad5SJay Sternberg static int nvme_reset(struct nvme_dev *dev) 212657dacad5SJay Sternberg { 21271c63dc66SChristoph Hellwig if (!dev->ctrl.admin_q || blk_queue_dying(dev->ctrl.admin_q)) 212857dacad5SJay Sternberg return -ENODEV; 212957dacad5SJay Sternberg 2130846cc05fSChristoph Hellwig if (!queue_work(nvme_workq, &dev->reset_work)) 2131846cc05fSChristoph Hellwig return -EBUSY; 213257dacad5SJay Sternberg 213357dacad5SJay Sternberg flush_work(&dev->reset_work); 213457dacad5SJay Sternberg return 0; 213557dacad5SJay Sternberg } 213657dacad5SJay Sternberg 21371c63dc66SChristoph Hellwig static int nvme_pci_reg_read32(struct nvme_ctrl *ctrl, u32 off, u32 *val) 21381c63dc66SChristoph Hellwig { 21391c63dc66SChristoph Hellwig *val = readl(to_nvme_dev(ctrl)->bar + off); 21401c63dc66SChristoph Hellwig return 0; 21411c63dc66SChristoph Hellwig } 21421c63dc66SChristoph Hellwig 21435fd4ce1bSChristoph Hellwig static int nvme_pci_reg_write32(struct nvme_ctrl *ctrl, u32 off, u32 val) 21445fd4ce1bSChristoph Hellwig { 21455fd4ce1bSChristoph Hellwig writel(val, to_nvme_dev(ctrl)->bar + off); 21465fd4ce1bSChristoph Hellwig return 0; 21475fd4ce1bSChristoph Hellwig } 21485fd4ce1bSChristoph Hellwig 21497fd8930fSChristoph Hellwig static int nvme_pci_reg_read64(struct nvme_ctrl *ctrl, u32 off, u64 *val) 21507fd8930fSChristoph Hellwig { 21517fd8930fSChristoph Hellwig *val = readq(to_nvme_dev(ctrl)->bar + off); 21527fd8930fSChristoph Hellwig return 0; 21537fd8930fSChristoph Hellwig } 21547fd8930fSChristoph Hellwig 21555bae7f73SChristoph Hellwig static bool nvme_pci_io_incapable(struct nvme_ctrl *ctrl) 21565bae7f73SChristoph Hellwig { 21575bae7f73SChristoph Hellwig struct nvme_dev *dev = to_nvme_dev(ctrl); 21585bae7f73SChristoph Hellwig 21595bae7f73SChristoph Hellwig return !dev->bar || dev->online_queues < 2; 21605bae7f73SChristoph Hellwig } 21615bae7f73SChristoph Hellwig 2162f3ca80fcSChristoph Hellwig static int nvme_pci_reset_ctrl(struct nvme_ctrl *ctrl) 2163f3ca80fcSChristoph Hellwig { 2164f3ca80fcSChristoph Hellwig return nvme_reset(to_nvme_dev(ctrl)); 2165f3ca80fcSChristoph Hellwig } 2166f3ca80fcSChristoph Hellwig 21671c63dc66SChristoph Hellwig static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = { 21681c63dc66SChristoph Hellwig .reg_read32 = nvme_pci_reg_read32, 21695fd4ce1bSChristoph Hellwig .reg_write32 = nvme_pci_reg_write32, 21707fd8930fSChristoph Hellwig .reg_read64 = nvme_pci_reg_read64, 21715bae7f73SChristoph Hellwig .io_incapable = nvme_pci_io_incapable, 2172f3ca80fcSChristoph Hellwig .reset_ctrl = nvme_pci_reset_ctrl, 21731673f1f0SChristoph Hellwig .free_ctrl = nvme_pci_free_ctrl, 21741c63dc66SChristoph Hellwig }; 21751c63dc66SChristoph Hellwig 217657dacad5SJay Sternberg static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) 217757dacad5SJay Sternberg { 217857dacad5SJay Sternberg int node, result = -ENOMEM; 217957dacad5SJay Sternberg struct nvme_dev *dev; 218057dacad5SJay Sternberg 218157dacad5SJay Sternberg node = dev_to_node(&pdev->dev); 218257dacad5SJay Sternberg if (node == NUMA_NO_NODE) 218357dacad5SJay Sternberg set_dev_node(&pdev->dev, 0); 218457dacad5SJay Sternberg 218557dacad5SJay Sternberg dev = kzalloc_node(sizeof(*dev), GFP_KERNEL, node); 218657dacad5SJay Sternberg if (!dev) 218757dacad5SJay Sternberg return -ENOMEM; 218857dacad5SJay Sternberg dev->entry = kzalloc_node(num_possible_cpus() * sizeof(*dev->entry), 218957dacad5SJay Sternberg GFP_KERNEL, node); 219057dacad5SJay Sternberg if (!dev->entry) 219157dacad5SJay Sternberg goto free; 219257dacad5SJay Sternberg dev->queues = kzalloc_node((num_possible_cpus() + 1) * sizeof(void *), 219357dacad5SJay Sternberg GFP_KERNEL, node); 219457dacad5SJay Sternberg if (!dev->queues) 219557dacad5SJay Sternberg goto free; 219657dacad5SJay Sternberg 219757dacad5SJay Sternberg dev->dev = get_device(&pdev->dev); 219857dacad5SJay Sternberg pci_set_drvdata(pdev, dev); 21991c63dc66SChristoph Hellwig 220057dacad5SJay Sternberg INIT_LIST_HEAD(&dev->node); 220157dacad5SJay Sternberg INIT_WORK(&dev->scan_work, nvme_dev_scan); 2202f3ca80fcSChristoph Hellwig INIT_WORK(&dev->reset_work, nvme_reset_work); 22035c8809e6SChristoph Hellwig INIT_WORK(&dev->remove_work, nvme_remove_dead_ctrl_work); 220477bf25eaSKeith Busch mutex_init(&dev->shutdown_lock); 2205f3ca80fcSChristoph Hellwig 2206f3ca80fcSChristoph Hellwig result = nvme_setup_prp_pools(dev); 2207f3ca80fcSChristoph Hellwig if (result) 2208f3ca80fcSChristoph Hellwig goto put_pci; 2209f3ca80fcSChristoph Hellwig 2210f3ca80fcSChristoph Hellwig result = nvme_init_ctrl(&dev->ctrl, &pdev->dev, &nvme_pci_ctrl_ops, 2211f3ca80fcSChristoph Hellwig id->driver_data); 2212f3ca80fcSChristoph Hellwig if (result) 2213f3ca80fcSChristoph Hellwig goto release_pools; 2214f3ca80fcSChristoph Hellwig 221592f7a162SKeith Busch queue_work(nvme_workq, &dev->reset_work); 221657dacad5SJay Sternberg return 0; 221757dacad5SJay Sternberg 221857dacad5SJay Sternberg release_pools: 221957dacad5SJay Sternberg nvme_release_prp_pools(dev); 222057dacad5SJay Sternberg put_pci: 222157dacad5SJay Sternberg put_device(dev->dev); 222257dacad5SJay Sternberg free: 222357dacad5SJay Sternberg kfree(dev->queues); 222457dacad5SJay Sternberg kfree(dev->entry); 222557dacad5SJay Sternberg kfree(dev); 222657dacad5SJay Sternberg return result; 222757dacad5SJay Sternberg } 222857dacad5SJay Sternberg 222957dacad5SJay Sternberg static void nvme_reset_notify(struct pci_dev *pdev, bool prepare) 223057dacad5SJay Sternberg { 223157dacad5SJay Sternberg struct nvme_dev *dev = pci_get_drvdata(pdev); 223257dacad5SJay Sternberg 223357dacad5SJay Sternberg if (prepare) 223457dacad5SJay Sternberg nvme_dev_shutdown(dev); 223557dacad5SJay Sternberg else 223692f7a162SKeith Busch queue_work(nvme_workq, &dev->reset_work); 223757dacad5SJay Sternberg } 223857dacad5SJay Sternberg 223957dacad5SJay Sternberg static void nvme_shutdown(struct pci_dev *pdev) 224057dacad5SJay Sternberg { 224157dacad5SJay Sternberg struct nvme_dev *dev = pci_get_drvdata(pdev); 224257dacad5SJay Sternberg nvme_dev_shutdown(dev); 224357dacad5SJay Sternberg } 224457dacad5SJay Sternberg 224557dacad5SJay Sternberg static void nvme_remove(struct pci_dev *pdev) 224657dacad5SJay Sternberg { 224757dacad5SJay Sternberg struct nvme_dev *dev = pci_get_drvdata(pdev); 224857dacad5SJay Sternberg 224957dacad5SJay Sternberg spin_lock(&dev_list_lock); 225057dacad5SJay Sternberg list_del_init(&dev->node); 225157dacad5SJay Sternberg spin_unlock(&dev_list_lock); 225257dacad5SJay Sternberg 225357dacad5SJay Sternberg pci_set_drvdata(pdev, NULL); 225457dacad5SJay Sternberg flush_work(&dev->reset_work); 225557dacad5SJay Sternberg flush_work(&dev->scan_work); 22565bae7f73SChristoph Hellwig nvme_remove_namespaces(&dev->ctrl); 225753029b04SKeith Busch nvme_uninit_ctrl(&dev->ctrl); 225857dacad5SJay Sternberg nvme_dev_shutdown(dev); 225957dacad5SJay Sternberg nvme_dev_remove_admin(dev); 226057dacad5SJay Sternberg nvme_free_queues(dev, 0); 226157dacad5SJay Sternberg nvme_release_cmb(dev); 226257dacad5SJay Sternberg nvme_release_prp_pools(dev); 22631673f1f0SChristoph Hellwig nvme_put_ctrl(&dev->ctrl); 226457dacad5SJay Sternberg } 226557dacad5SJay Sternberg 226657dacad5SJay Sternberg /* These functions are yet to be implemented */ 226757dacad5SJay Sternberg #define nvme_error_detected NULL 226857dacad5SJay Sternberg #define nvme_dump_registers NULL 226957dacad5SJay Sternberg #define nvme_link_reset NULL 227057dacad5SJay Sternberg #define nvme_slot_reset NULL 227157dacad5SJay Sternberg #define nvme_error_resume NULL 227257dacad5SJay Sternberg 227357dacad5SJay Sternberg #ifdef CONFIG_PM_SLEEP 227457dacad5SJay Sternberg static int nvme_suspend(struct device *dev) 227557dacad5SJay Sternberg { 227657dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev); 227757dacad5SJay Sternberg struct nvme_dev *ndev = pci_get_drvdata(pdev); 227857dacad5SJay Sternberg 227957dacad5SJay Sternberg nvme_dev_shutdown(ndev); 228057dacad5SJay Sternberg return 0; 228157dacad5SJay Sternberg } 228257dacad5SJay Sternberg 228357dacad5SJay Sternberg static int nvme_resume(struct device *dev) 228457dacad5SJay Sternberg { 228557dacad5SJay Sternberg struct pci_dev *pdev = to_pci_dev(dev); 228657dacad5SJay Sternberg struct nvme_dev *ndev = pci_get_drvdata(pdev); 228757dacad5SJay Sternberg 228892f7a162SKeith Busch queue_work(nvme_workq, &ndev->reset_work); 228957dacad5SJay Sternberg return 0; 229057dacad5SJay Sternberg } 229157dacad5SJay Sternberg #endif 229257dacad5SJay Sternberg 229357dacad5SJay Sternberg static SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume); 229457dacad5SJay Sternberg 229557dacad5SJay Sternberg static const struct pci_error_handlers nvme_err_handler = { 229657dacad5SJay Sternberg .error_detected = nvme_error_detected, 229757dacad5SJay Sternberg .mmio_enabled = nvme_dump_registers, 229857dacad5SJay Sternberg .link_reset = nvme_link_reset, 229957dacad5SJay Sternberg .slot_reset = nvme_slot_reset, 230057dacad5SJay Sternberg .resume = nvme_error_resume, 230157dacad5SJay Sternberg .reset_notify = nvme_reset_notify, 230257dacad5SJay Sternberg }; 230357dacad5SJay Sternberg 230457dacad5SJay Sternberg /* Move to pci_ids.h later */ 230557dacad5SJay Sternberg #define PCI_CLASS_STORAGE_EXPRESS 0x010802 230657dacad5SJay Sternberg 230757dacad5SJay Sternberg static const struct pci_device_id nvme_id_table[] = { 2308106198edSChristoph Hellwig { PCI_VDEVICE(INTEL, 0x0953), 2309106198edSChristoph Hellwig .driver_data = NVME_QUIRK_STRIPE_SIZE, }, 2310540c801cSKeith Busch { PCI_VDEVICE(INTEL, 0x5845), /* Qemu emulated controller */ 2311540c801cSKeith Busch .driver_data = NVME_QUIRK_IDENTIFY_CNS, }, 231257dacad5SJay Sternberg { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 2313c74dc780SStephan Günther { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2001) }, 231457dacad5SJay Sternberg { 0, } 231557dacad5SJay Sternberg }; 231657dacad5SJay Sternberg MODULE_DEVICE_TABLE(pci, nvme_id_table); 231757dacad5SJay Sternberg 231857dacad5SJay Sternberg static struct pci_driver nvme_driver = { 231957dacad5SJay Sternberg .name = "nvme", 232057dacad5SJay Sternberg .id_table = nvme_id_table, 232157dacad5SJay Sternberg .probe = nvme_probe, 232257dacad5SJay Sternberg .remove = nvme_remove, 232357dacad5SJay Sternberg .shutdown = nvme_shutdown, 232457dacad5SJay Sternberg .driver = { 232557dacad5SJay Sternberg .pm = &nvme_dev_pm_ops, 232657dacad5SJay Sternberg }, 232757dacad5SJay Sternberg .err_handler = &nvme_err_handler, 232857dacad5SJay Sternberg }; 232957dacad5SJay Sternberg 233057dacad5SJay Sternberg static int __init nvme_init(void) 233157dacad5SJay Sternberg { 233257dacad5SJay Sternberg int result; 233357dacad5SJay Sternberg 233457dacad5SJay Sternberg init_waitqueue_head(&nvme_kthread_wait); 233557dacad5SJay Sternberg 233692f7a162SKeith Busch nvme_workq = alloc_workqueue("nvme", WQ_UNBOUND | WQ_MEM_RECLAIM, 0); 233757dacad5SJay Sternberg if (!nvme_workq) 233857dacad5SJay Sternberg return -ENOMEM; 233957dacad5SJay Sternberg 23405bae7f73SChristoph Hellwig result = nvme_core_init(); 234157dacad5SJay Sternberg if (result < 0) 234257dacad5SJay Sternberg goto kill_workq; 234357dacad5SJay Sternberg 234457dacad5SJay Sternberg result = pci_register_driver(&nvme_driver); 234557dacad5SJay Sternberg if (result) 2346f3ca80fcSChristoph Hellwig goto core_exit; 234757dacad5SJay Sternberg return 0; 234857dacad5SJay Sternberg 2349f3ca80fcSChristoph Hellwig core_exit: 23505bae7f73SChristoph Hellwig nvme_core_exit(); 235157dacad5SJay Sternberg kill_workq: 235257dacad5SJay Sternberg destroy_workqueue(nvme_workq); 235357dacad5SJay Sternberg return result; 235457dacad5SJay Sternberg } 235557dacad5SJay Sternberg 235657dacad5SJay Sternberg static void __exit nvme_exit(void) 235757dacad5SJay Sternberg { 235857dacad5SJay Sternberg pci_unregister_driver(&nvme_driver); 23595bae7f73SChristoph Hellwig nvme_core_exit(); 236057dacad5SJay Sternberg destroy_workqueue(nvme_workq); 236157dacad5SJay Sternberg BUG_ON(nvme_thread && !IS_ERR(nvme_thread)); 236257dacad5SJay Sternberg _nvme_check_size(); 236357dacad5SJay Sternberg } 236457dacad5SJay Sternberg 236557dacad5SJay Sternberg MODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 236657dacad5SJay Sternberg MODULE_LICENSE("GPL"); 236757dacad5SJay Sternberg MODULE_VERSION("1.0"); 236857dacad5SJay Sternberg module_init(nvme_init); 236957dacad5SJay Sternberg module_exit(nvme_exit); 2370