157dacad5SJay Sternberg /* 257dacad5SJay Sternberg * Copyright (c) 2011-2014, Intel Corporation. 357dacad5SJay Sternberg * 457dacad5SJay Sternberg * This program is free software; you can redistribute it and/or modify it 557dacad5SJay Sternberg * under the terms and conditions of the GNU General Public License, 657dacad5SJay Sternberg * version 2, as published by the Free Software Foundation. 757dacad5SJay Sternberg * 857dacad5SJay Sternberg * This program is distributed in the hope it will be useful, but WITHOUT 957dacad5SJay Sternberg * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1057dacad5SJay Sternberg * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 1157dacad5SJay Sternberg * more details. 1257dacad5SJay Sternberg */ 1357dacad5SJay Sternberg 1457dacad5SJay Sternberg #ifndef _NVME_H 1557dacad5SJay Sternberg #define _NVME_H 1657dacad5SJay Sternberg 1757dacad5SJay Sternberg #include <linux/nvme.h> 18a6a5149bSChristoph Hellwig #include <linux/cdev.h> 1957dacad5SJay Sternberg #include <linux/pci.h> 2057dacad5SJay Sternberg #include <linux/kref.h> 2157dacad5SJay Sternberg #include <linux/blk-mq.h> 22b0b4e09cSMatias Bjørling #include <linux/lightnvm.h> 23a98e58e5SScott Bauer #include <linux/sed-opal.h> 2457dacad5SJay Sternberg 258ae4e447SMarc Olson extern unsigned int nvme_io_timeout; 2657dacad5SJay Sternberg #define NVME_IO_TIMEOUT (nvme_io_timeout * HZ) 2757dacad5SJay Sternberg 288ae4e447SMarc Olson extern unsigned int admin_timeout; 2921d34711SChristoph Hellwig #define ADMIN_TIMEOUT (admin_timeout * HZ) 3021d34711SChristoph Hellwig 31038bd4cbSSagi Grimberg #define NVME_DEFAULT_KATO 5 32038bd4cbSSagi Grimberg #define NVME_KATO_GRACE 10 33038bd4cbSSagi Grimberg 349a6327d2SSagi Grimberg extern struct workqueue_struct *nvme_wq; 359a6327d2SSagi Grimberg 36ca064085SMatias Bjørling enum { 37ca064085SMatias Bjørling NVME_NS_LBA = 0, 38ca064085SMatias Bjørling NVME_NS_LIGHTNVM = 1, 39ca064085SMatias Bjørling }; 40ca064085SMatias Bjørling 4157dacad5SJay Sternberg /* 42106198edSChristoph Hellwig * List of workarounds for devices that required behavior not specified in 43106198edSChristoph Hellwig * the standard. 4457dacad5SJay Sternberg */ 45106198edSChristoph Hellwig enum nvme_quirks { 46106198edSChristoph Hellwig /* 47106198edSChristoph Hellwig * Prefers I/O aligned to a stripe size specified in a vendor 48106198edSChristoph Hellwig * specific Identify field. 49106198edSChristoph Hellwig */ 50106198edSChristoph Hellwig NVME_QUIRK_STRIPE_SIZE = (1 << 0), 51540c801cSKeith Busch 52540c801cSKeith Busch /* 53540c801cSKeith Busch * The controller doesn't handle Identify value others than 0 or 1 54540c801cSKeith Busch * correctly. 55540c801cSKeith Busch */ 56540c801cSKeith Busch NVME_QUIRK_IDENTIFY_CNS = (1 << 1), 5708095e70SKeith Busch 5808095e70SKeith Busch /* 59e850fd16SChristoph Hellwig * The controller deterministically returns O's on reads to 60e850fd16SChristoph Hellwig * logical blocks that deallocate was called on. 6108095e70SKeith Busch */ 62e850fd16SChristoph Hellwig NVME_QUIRK_DEALLOCATE_ZEROES = (1 << 2), 6354adc010SGuilherme G. Piccoli 6454adc010SGuilherme G. Piccoli /* 6554adc010SGuilherme G. Piccoli * The controller needs a delay before starts checking the device 6654adc010SGuilherme G. Piccoli * readiness, which is done by reading the NVME_CSTS_RDY bit. 6754adc010SGuilherme G. Piccoli */ 6854adc010SGuilherme G. Piccoli NVME_QUIRK_DELAY_BEFORE_CHK_RDY = (1 << 3), 69c5552fdeSAndy Lutomirski 70c5552fdeSAndy Lutomirski /* 71c5552fdeSAndy Lutomirski * APST should not be used. 72c5552fdeSAndy Lutomirski */ 73c5552fdeSAndy Lutomirski NVME_QUIRK_NO_APST = (1 << 4), 74ff5350a8SAndy Lutomirski 75ff5350a8SAndy Lutomirski /* 76ff5350a8SAndy Lutomirski * The deepest sleep state should not be used. 77ff5350a8SAndy Lutomirski */ 78ff5350a8SAndy Lutomirski NVME_QUIRK_NO_DEEPEST_PS = (1 << 5), 79608cc4b1SChristoph Hellwig 80608cc4b1SChristoph Hellwig /* 81608cc4b1SChristoph Hellwig * Supports the LighNVM command set if indicated in vs[1]. 82608cc4b1SChristoph Hellwig */ 83608cc4b1SChristoph Hellwig NVME_QUIRK_LIGHTNVM = (1 << 6), 84106198edSChristoph Hellwig }; 85106198edSChristoph Hellwig 86d49187e9SChristoph Hellwig /* 87d49187e9SChristoph Hellwig * Common request structure for NVMe passthrough. All drivers must have 88d49187e9SChristoph Hellwig * this structure as the first member of their request-private data. 89d49187e9SChristoph Hellwig */ 90d49187e9SChristoph Hellwig struct nvme_request { 91d49187e9SChristoph Hellwig struct nvme_command *cmd; 92d49187e9SChristoph Hellwig union nvme_result result; 9344e44b29SChristoph Hellwig u8 retries; 9427fa9bc5SChristoph Hellwig u8 flags; 9527fa9bc5SChristoph Hellwig u16 status; 9627fa9bc5SChristoph Hellwig }; 9727fa9bc5SChristoph Hellwig 9832acab31SChristoph Hellwig /* 9932acab31SChristoph Hellwig * Mark a bio as coming in through the mpath node. 10032acab31SChristoph Hellwig */ 10132acab31SChristoph Hellwig #define REQ_NVME_MPATH REQ_DRV 10232acab31SChristoph Hellwig 10327fa9bc5SChristoph Hellwig enum { 10427fa9bc5SChristoph Hellwig NVME_REQ_CANCELLED = (1 << 0), 105d49187e9SChristoph Hellwig }; 106d49187e9SChristoph Hellwig 107d49187e9SChristoph Hellwig static inline struct nvme_request *nvme_req(struct request *req) 108d49187e9SChristoph Hellwig { 109d49187e9SChristoph Hellwig return blk_mq_rq_to_pdu(req); 110d49187e9SChristoph Hellwig } 111d49187e9SChristoph Hellwig 11254adc010SGuilherme G. Piccoli /* The below value is the specific amount of delay needed before checking 11354adc010SGuilherme G. Piccoli * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the 11454adc010SGuilherme G. Piccoli * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was 11554adc010SGuilherme G. Piccoli * found empirically. 11654adc010SGuilherme G. Piccoli */ 1178c97eeccSJeff Lien #define NVME_QUIRK_DELAY_AMOUNT 2300 11854adc010SGuilherme G. Piccoli 119bb8d261eSChristoph Hellwig enum nvme_ctrl_state { 120bb8d261eSChristoph Hellwig NVME_CTRL_NEW, 121bb8d261eSChristoph Hellwig NVME_CTRL_LIVE, 1222b1b7e78SJianchao Wang NVME_CTRL_ADMIN_ONLY, /* Only admin queue live */ 123bb8d261eSChristoph Hellwig NVME_CTRL_RESETTING, 124def61ecaSChristoph Hellwig NVME_CTRL_RECONNECTING, 125bb8d261eSChristoph Hellwig NVME_CTRL_DELETING, 1260ff9d4e1SKeith Busch NVME_CTRL_DEAD, 127bb8d261eSChristoph Hellwig }; 128bb8d261eSChristoph Hellwig 1291c63dc66SChristoph Hellwig struct nvme_ctrl { 130bb8d261eSChristoph Hellwig enum nvme_ctrl_state state; 131bd4da3abSAndy Lutomirski bool identified; 132bb8d261eSChristoph Hellwig spinlock_t lock; 1331c63dc66SChristoph Hellwig const struct nvme_ctrl_ops *ops; 13457dacad5SJay Sternberg struct request_queue *admin_q; 13507bfcd09SChristoph Hellwig struct request_queue *connect_q; 13657dacad5SJay Sternberg struct device *dev; 13757dacad5SJay Sternberg int instance; 1385bae7f73SChristoph Hellwig struct blk_mq_tag_set *tagset; 13934b6c231SSagi Grimberg struct blk_mq_tag_set *admin_tagset; 1405bae7f73SChristoph Hellwig struct list_head namespaces; 14169d3b8acSChristoph Hellwig struct mutex namespaces_mutex; 142d22524a4SChristoph Hellwig struct device ctrl_device; 1435bae7f73SChristoph Hellwig struct device *device; /* char device */ 144a6a5149bSChristoph Hellwig struct cdev cdev; 145d86c4d8eSChristoph Hellwig struct work_struct reset_work; 146c5017e85SChristoph Hellwig struct work_struct delete_work; 1471c63dc66SChristoph Hellwig 148ab9e00ccSChristoph Hellwig struct nvme_subsystem *subsys; 149ab9e00ccSChristoph Hellwig struct list_head subsys_entry; 150ab9e00ccSChristoph Hellwig 1514f1244c8SChristoph Hellwig struct opal_dev *opal_dev; 152a98e58e5SScott Bauer 15357dacad5SJay Sternberg char name[12]; 15476e3914aSChristoph Hellwig u16 cntlid; 1555fd4ce1bSChristoph Hellwig 1565fd4ce1bSChristoph Hellwig u32 ctrl_config; 157b6dccf7fSArnav Dawn u16 mtfa; 158d858e5f0SSagi Grimberg u32 queue_count; 1595fd4ce1bSChristoph Hellwig 16020d0dfe6SSagi Grimberg u64 cap; 1615fd4ce1bSChristoph Hellwig u32 page_size; 16257dacad5SJay Sternberg u32 max_hw_sectors; 16357dacad5SJay Sternberg u16 oncs; 1648a9ae523SScott Bauer u16 oacs; 165f5d11840SJens Axboe u16 nssa; 166f5d11840SJens Axboe u16 nr_streams; 1676bf25d16SChristoph Hellwig atomic_t abort_limit; 16857dacad5SJay Sternberg u8 vwc; 169f3ca80fcSChristoph Hellwig u32 vs; 17007bfcd09SChristoph Hellwig u32 sgls; 171038bd4cbSSagi Grimberg u16 kas; 172c5552fdeSAndy Lutomirski u8 npss; 173c5552fdeSAndy Lutomirski u8 apsta; 174e3d7874dSKeith Busch u32 aen_result; 17507fbd32aSMartin K. Petersen unsigned int shutdown_timeout; 176038bd4cbSSagi Grimberg unsigned int kato; 177f3ca80fcSChristoph Hellwig bool subsystem; 178106198edSChristoph Hellwig unsigned long quirks; 179c5552fdeSAndy Lutomirski struct nvme_id_power_state psd[32]; 18084fef62dSKeith Busch struct nvme_effects_log *effects; 1815955be21SChristoph Hellwig struct work_struct scan_work; 182f866fc42SChristoph Hellwig struct work_struct async_event_work; 183038bd4cbSSagi Grimberg struct delayed_work ka_work; 184b6dccf7fSArnav Dawn struct work_struct fw_act_work; 18507bfcd09SChristoph Hellwig 186c5552fdeSAndy Lutomirski /* Power saving configuration */ 187c5552fdeSAndy Lutomirski u64 ps_max_latency_us; 18876a5af84SKai-Heng Feng bool apst_enabled; 189c5552fdeSAndy Lutomirski 190044a9df1SChristoph Hellwig /* PCIe only: */ 191fe6d53c9SChristoph Hellwig u32 hmpre; 192fe6d53c9SChristoph Hellwig u32 hmmin; 193044a9df1SChristoph Hellwig u32 hmminds; 194044a9df1SChristoph Hellwig u16 hmmaxd; 195fe6d53c9SChristoph Hellwig 19607bfcd09SChristoph Hellwig /* Fabrics only */ 19707bfcd09SChristoph Hellwig u16 sqsize; 19807bfcd09SChristoph Hellwig u32 ioccsz; 19907bfcd09SChristoph Hellwig u32 iorcsz; 20007bfcd09SChristoph Hellwig u16 icdoff; 20107bfcd09SChristoph Hellwig u16 maxcmd; 202fdf9dfa8SSagi Grimberg int nr_reconnects; 20307bfcd09SChristoph Hellwig struct nvmf_ctrl_options *opts; 20457dacad5SJay Sternberg }; 20557dacad5SJay Sternberg 206ab9e00ccSChristoph Hellwig struct nvme_subsystem { 207ab9e00ccSChristoph Hellwig int instance; 208ab9e00ccSChristoph Hellwig struct device dev; 209ab9e00ccSChristoph Hellwig /* 210ab9e00ccSChristoph Hellwig * Because we unregister the device on the last put we need 211ab9e00ccSChristoph Hellwig * a separate refcount. 212ab9e00ccSChristoph Hellwig */ 213ab9e00ccSChristoph Hellwig struct kref ref; 214ab9e00ccSChristoph Hellwig struct list_head entry; 215ab9e00ccSChristoph Hellwig struct mutex lock; 216ab9e00ccSChristoph Hellwig struct list_head ctrls; 217ed754e5dSChristoph Hellwig struct list_head nsheads; 218ab9e00ccSChristoph Hellwig char subnqn[NVMF_NQN_SIZE]; 219ab9e00ccSChristoph Hellwig char serial[20]; 220ab9e00ccSChristoph Hellwig char model[40]; 221ab9e00ccSChristoph Hellwig char firmware_rev[8]; 222ab9e00ccSChristoph Hellwig u8 cmic; 223ab9e00ccSChristoph Hellwig u16 vendor_id; 224ed754e5dSChristoph Hellwig struct ida ns_ida; 225ab9e00ccSChristoph Hellwig }; 226ab9e00ccSChristoph Hellwig 227002fab04SChristoph Hellwig /* 228002fab04SChristoph Hellwig * Container structure for uniqueue namespace identifiers. 229002fab04SChristoph Hellwig */ 230002fab04SChristoph Hellwig struct nvme_ns_ids { 231002fab04SChristoph Hellwig u8 eui64[8]; 232002fab04SChristoph Hellwig u8 nguid[16]; 233002fab04SChristoph Hellwig uuid_t uuid; 234002fab04SChristoph Hellwig }; 235002fab04SChristoph Hellwig 236ed754e5dSChristoph Hellwig /* 237ed754e5dSChristoph Hellwig * Anchor structure for namespaces. There is one for each namespace in a 238ed754e5dSChristoph Hellwig * NVMe subsystem that any of our controllers can see, and the namespace 239ed754e5dSChristoph Hellwig * structure for each controller is chained of it. For private namespaces 240ed754e5dSChristoph Hellwig * there is a 1:1 relation to our namespace structures, that is ->list 241ed754e5dSChristoph Hellwig * only ever has a single entry for private namespaces. 242ed754e5dSChristoph Hellwig */ 243ed754e5dSChristoph Hellwig struct nvme_ns_head { 24432acab31SChristoph Hellwig #ifdef CONFIG_NVME_MULTIPATH 24532acab31SChristoph Hellwig struct gendisk *disk; 24632acab31SChristoph Hellwig struct nvme_ns __rcu *current_path; 24732acab31SChristoph Hellwig struct bio_list requeue_list; 24832acab31SChristoph Hellwig spinlock_t requeue_lock; 24932acab31SChristoph Hellwig struct work_struct requeue_work; 25032acab31SChristoph Hellwig #endif 251ed754e5dSChristoph Hellwig struct list_head list; 252ed754e5dSChristoph Hellwig struct srcu_struct srcu; 253ed754e5dSChristoph Hellwig struct nvme_subsystem *subsys; 254ed754e5dSChristoph Hellwig unsigned ns_id; 255ed754e5dSChristoph Hellwig struct nvme_ns_ids ids; 256ed754e5dSChristoph Hellwig struct list_head entry; 257ed754e5dSChristoph Hellwig struct kref ref; 258ed754e5dSChristoph Hellwig int instance; 259ed754e5dSChristoph Hellwig }; 260ed754e5dSChristoph Hellwig 26157dacad5SJay Sternberg struct nvme_ns { 26257dacad5SJay Sternberg struct list_head list; 26357dacad5SJay Sternberg 2641c63dc66SChristoph Hellwig struct nvme_ctrl *ctrl; 26557dacad5SJay Sternberg struct request_queue *queue; 26657dacad5SJay Sternberg struct gendisk *disk; 267ed754e5dSChristoph Hellwig struct list_head siblings; 268b0b4e09cSMatias Bjørling struct nvm_dev *ndev; 26957dacad5SJay Sternberg struct kref kref; 270ed754e5dSChristoph Hellwig struct nvme_ns_head *head; 27157dacad5SJay Sternberg 27257dacad5SJay Sternberg int lba_shift; 27357dacad5SJay Sternberg u16 ms; 274f5d11840SJens Axboe u16 sgs; 275f5d11840SJens Axboe u32 sws; 27657dacad5SJay Sternberg bool ext; 27757dacad5SJay Sternberg u8 pi_type; 278646017a6SKeith Busch unsigned long flags; 279646017a6SKeith Busch #define NVME_NS_REMOVING 0 28069d9a99cSKeith Busch #define NVME_NS_DEAD 1 28157eeaf8eSChristoph Hellwig u16 noiob; 28257dacad5SJay Sternberg }; 28357dacad5SJay Sternberg 2841c63dc66SChristoph Hellwig struct nvme_ctrl_ops { 2851a353d85SMing Lin const char *name; 286e439bb12SSagi Grimberg struct module *module; 287d3d5b87dSChristoph Hellwig unsigned int flags; 288d3d5b87dSChristoph Hellwig #define NVME_F_FABRICS (1 << 0) 289c81bfba9SChristoph Hellwig #define NVME_F_METADATA_SUPPORTED (1 << 1) 2901c63dc66SChristoph Hellwig int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val); 2915fd4ce1bSChristoph Hellwig int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val); 2927fd8930fSChristoph Hellwig int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val); 2931673f1f0SChristoph Hellwig void (*free_ctrl)(struct nvme_ctrl *ctrl); 294ad22c355SKeith Busch void (*submit_async_event)(struct nvme_ctrl *ctrl); 295c5017e85SChristoph Hellwig void (*delete_ctrl)(struct nvme_ctrl *ctrl); 2961a353d85SMing Lin int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size); 29731b84460SSagi Grimberg int (*reinit_request)(void *data, struct request *rq); 29857dacad5SJay Sternberg }; 29957dacad5SJay Sternberg 3001c63dc66SChristoph Hellwig static inline bool nvme_ctrl_ready(struct nvme_ctrl *ctrl) 3011c63dc66SChristoph Hellwig { 3021c63dc66SChristoph Hellwig u32 val = 0; 3031c63dc66SChristoph Hellwig 3041c63dc66SChristoph Hellwig if (ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &val)) 3051c63dc66SChristoph Hellwig return false; 3061c63dc66SChristoph Hellwig return val & NVME_CSTS_RDY; 3071c63dc66SChristoph Hellwig } 3081c63dc66SChristoph Hellwig 309f3ca80fcSChristoph Hellwig static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl) 310f3ca80fcSChristoph Hellwig { 311f3ca80fcSChristoph Hellwig if (!ctrl->subsystem) 312f3ca80fcSChristoph Hellwig return -ENOTTY; 313f3ca80fcSChristoph Hellwig return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65); 314f3ca80fcSChristoph Hellwig } 315f3ca80fcSChristoph Hellwig 31657dacad5SJay Sternberg static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector) 31757dacad5SJay Sternberg { 31857dacad5SJay Sternberg return (sector >> (ns->lba_shift - 9)); 31957dacad5SJay Sternberg } 32057dacad5SJay Sternberg 3216904242dSMing Lin static inline void nvme_cleanup_cmd(struct request *req) 3226904242dSMing Lin { 323f9d03f96SChristoph Hellwig if (req->rq_flags & RQF_SPECIAL_PAYLOAD) { 324f9d03f96SChristoph Hellwig kfree(page_address(req->special_vec.bv_page) + 325f9d03f96SChristoph Hellwig req->special_vec.bv_offset); 326f9d03f96SChristoph Hellwig } 3276904242dSMing Lin } 3286904242dSMing Lin 32927fa9bc5SChristoph Hellwig static inline void nvme_end_request(struct request *req, __le16 status, 33027fa9bc5SChristoph Hellwig union nvme_result result) 33115a190f7SChristoph Hellwig { 33227fa9bc5SChristoph Hellwig struct nvme_request *rq = nvme_req(req); 33327fa9bc5SChristoph Hellwig 33427fa9bc5SChristoph Hellwig rq->status = le16_to_cpu(status) >> 1; 33527fa9bc5SChristoph Hellwig rq->result = result; 33608e0029aSChristoph Hellwig blk_mq_complete_request(req); 33715a190f7SChristoph Hellwig } 33815a190f7SChristoph Hellwig 339d22524a4SChristoph Hellwig static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl) 340d22524a4SChristoph Hellwig { 341d22524a4SChristoph Hellwig get_device(ctrl->device); 342d22524a4SChristoph Hellwig } 343d22524a4SChristoph Hellwig 344d22524a4SChristoph Hellwig static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl) 345d22524a4SChristoph Hellwig { 346d22524a4SChristoph Hellwig put_device(ctrl->device); 347d22524a4SChristoph Hellwig } 348d22524a4SChristoph Hellwig 34977f02a7aSChristoph Hellwig void nvme_complete_rq(struct request *req); 350c55a2fd4SMing Lin void nvme_cancel_request(struct request *req, void *data, bool reserved); 351bb8d261eSChristoph Hellwig bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, 352bb8d261eSChristoph Hellwig enum nvme_ctrl_state new_state); 3535fd4ce1bSChristoph Hellwig int nvme_disable_ctrl(struct nvme_ctrl *ctrl, u64 cap); 3545fd4ce1bSChristoph Hellwig int nvme_enable_ctrl(struct nvme_ctrl *ctrl, u64 cap); 3555fd4ce1bSChristoph Hellwig int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl); 356f3ca80fcSChristoph Hellwig int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, 357f3ca80fcSChristoph Hellwig const struct nvme_ctrl_ops *ops, unsigned long quirks); 35853029b04SKeith Busch void nvme_uninit_ctrl(struct nvme_ctrl *ctrl); 359d09f2b45SSagi Grimberg void nvme_start_ctrl(struct nvme_ctrl *ctrl); 360d09f2b45SSagi Grimberg void nvme_stop_ctrl(struct nvme_ctrl *ctrl); 3611673f1f0SChristoph Hellwig void nvme_put_ctrl(struct nvme_ctrl *ctrl); 3627fd8930fSChristoph Hellwig int nvme_init_identify(struct nvme_ctrl *ctrl); 3635bae7f73SChristoph Hellwig 3645955be21SChristoph Hellwig void nvme_queue_scan(struct nvme_ctrl *ctrl); 3655bae7f73SChristoph Hellwig void nvme_remove_namespaces(struct nvme_ctrl *ctrl); 3661673f1f0SChristoph Hellwig 3674f1244c8SChristoph Hellwig int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len, 3684f1244c8SChristoph Hellwig bool send); 369a98e58e5SScott Bauer 3707bf58533SChristoph Hellwig void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status, 3717bf58533SChristoph Hellwig union nvme_result *res); 372f866fc42SChristoph Hellwig 37325646264SKeith Busch void nvme_stop_queues(struct nvme_ctrl *ctrl); 37425646264SKeith Busch void nvme_start_queues(struct nvme_ctrl *ctrl); 37569d9a99cSKeith Busch void nvme_kill_queues(struct nvme_ctrl *ctrl); 376302ad8ccSKeith Busch void nvme_unfreeze(struct nvme_ctrl *ctrl); 377302ad8ccSKeith Busch void nvme_wait_freeze(struct nvme_ctrl *ctrl); 378302ad8ccSKeith Busch void nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout); 379302ad8ccSKeith Busch void nvme_start_freeze(struct nvme_ctrl *ctrl); 38031b84460SSagi Grimberg int nvme_reinit_tagset(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set); 381363c9aacSSagi Grimberg 382eb71f435SChristoph Hellwig #define NVME_QID_ANY -1 3834160982eSChristoph Hellwig struct request *nvme_alloc_request(struct request_queue *q, 3849a95e4efSBart Van Assche struct nvme_command *cmd, blk_mq_req_flags_t flags, int qid); 385fc17b653SChristoph Hellwig blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req, 3868093f7caSMing Lin struct nvme_command *cmd); 38757dacad5SJay Sternberg int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, 38857dacad5SJay Sternberg void *buf, unsigned bufflen); 38957dacad5SJay Sternberg int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, 390d49187e9SChristoph Hellwig union nvme_result *result, void *buffer, unsigned bufflen, 3919a95e4efSBart Van Assche unsigned timeout, int qid, int at_head, 3929a95e4efSBart Van Assche blk_mq_req_flags_t flags); 3939a0be7abSChristoph Hellwig int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count); 394038bd4cbSSagi Grimberg void nvme_start_keep_alive(struct nvme_ctrl *ctrl); 395038bd4cbSSagi Grimberg void nvme_stop_keep_alive(struct nvme_ctrl *ctrl); 396d86c4d8eSChristoph Hellwig int nvme_reset_ctrl(struct nvme_ctrl *ctrl); 397c5017e85SChristoph Hellwig int nvme_delete_ctrl(struct nvme_ctrl *ctrl); 398c5017e85SChristoph Hellwig int nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl); 39957dacad5SJay Sternberg 4005b85b826SChristoph Hellwig extern const struct attribute_group nvme_ns_id_attr_group; 40132acab31SChristoph Hellwig extern const struct block_device_operations nvme_ns_head_ops; 40232acab31SChristoph Hellwig 40332acab31SChristoph Hellwig #ifdef CONFIG_NVME_MULTIPATH 40432acab31SChristoph Hellwig void nvme_failover_req(struct request *req); 40532acab31SChristoph Hellwig bool nvme_req_needs_failover(struct request *req); 40632acab31SChristoph Hellwig void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl); 40732acab31SChristoph Hellwig int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head); 40832acab31SChristoph Hellwig void nvme_mpath_add_disk(struct nvme_ns_head *head); 409e9a48034SHannes Reinecke void nvme_mpath_add_disk_links(struct nvme_ns *ns); 41032acab31SChristoph Hellwig void nvme_mpath_remove_disk(struct nvme_ns_head *head); 411e9a48034SHannes Reinecke void nvme_mpath_remove_disk_links(struct nvme_ns *ns); 41232acab31SChristoph Hellwig 41332acab31SChristoph Hellwig static inline void nvme_mpath_clear_current_path(struct nvme_ns *ns) 41432acab31SChristoph Hellwig { 41532acab31SChristoph Hellwig struct nvme_ns_head *head = ns->head; 41632acab31SChristoph Hellwig 41732acab31SChristoph Hellwig if (head && ns == srcu_dereference(head->current_path, &head->srcu)) 41832acab31SChristoph Hellwig rcu_assign_pointer(head->current_path, NULL); 41932acab31SChristoph Hellwig } 42032acab31SChristoph Hellwig struct nvme_ns *nvme_find_path(struct nvme_ns_head *head); 42132acab31SChristoph Hellwig #else 42232acab31SChristoph Hellwig static inline void nvme_failover_req(struct request *req) 42332acab31SChristoph Hellwig { 42432acab31SChristoph Hellwig } 42532acab31SChristoph Hellwig static inline bool nvme_req_needs_failover(struct request *req) 42632acab31SChristoph Hellwig { 42732acab31SChristoph Hellwig return false; 42832acab31SChristoph Hellwig } 42932acab31SChristoph Hellwig static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl) 43032acab31SChristoph Hellwig { 43132acab31SChristoph Hellwig } 43232acab31SChristoph Hellwig static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, 43332acab31SChristoph Hellwig struct nvme_ns_head *head) 43432acab31SChristoph Hellwig { 43532acab31SChristoph Hellwig return 0; 43632acab31SChristoph Hellwig } 43732acab31SChristoph Hellwig static inline void nvme_mpath_add_disk(struct nvme_ns_head *head) 43832acab31SChristoph Hellwig { 43932acab31SChristoph Hellwig } 44032acab31SChristoph Hellwig static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head) 44132acab31SChristoph Hellwig { 44232acab31SChristoph Hellwig } 443e9a48034SHannes Reinecke static inline void nvme_mpath_add_disk_links(struct nvme_ns *ns) 444e9a48034SHannes Reinecke { 445e9a48034SHannes Reinecke } 446e9a48034SHannes Reinecke static inline void nvme_mpath_remove_disk_links(struct nvme_ns *ns) 447e9a48034SHannes Reinecke { 448e9a48034SHannes Reinecke } 44932acab31SChristoph Hellwig static inline void nvme_mpath_clear_current_path(struct nvme_ns *ns) 45032acab31SChristoph Hellwig { 45132acab31SChristoph Hellwig } 45232acab31SChristoph Hellwig #endif /* CONFIG_NVME_MULTIPATH */ 45332acab31SChristoph Hellwig 454c4699e70SKeith Busch #ifdef CONFIG_NVM 4553dc87dd0SMatias Bjørling int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node); 456b0b4e09cSMatias Bjørling void nvme_nvm_unregister(struct nvme_ns *ns); 4573dc87dd0SMatias Bjørling int nvme_nvm_register_sysfs(struct nvme_ns *ns); 4583dc87dd0SMatias Bjørling void nvme_nvm_unregister_sysfs(struct nvme_ns *ns); 45984d4add7SMatias Bjørling int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg); 460c4699e70SKeith Busch #else 461b0b4e09cSMatias Bjørling static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, 4623dc87dd0SMatias Bjørling int node) 463c4699e70SKeith Busch { 464c4699e70SKeith Busch return 0; 465c4699e70SKeith Busch } 466c4699e70SKeith Busch 467b0b4e09cSMatias Bjørling static inline void nvme_nvm_unregister(struct nvme_ns *ns) {}; 4683dc87dd0SMatias Bjørling static inline int nvme_nvm_register_sysfs(struct nvme_ns *ns) 4693dc87dd0SMatias Bjørling { 4703dc87dd0SMatias Bjørling return 0; 4713dc87dd0SMatias Bjørling } 4723dc87dd0SMatias Bjørling static inline void nvme_nvm_unregister_sysfs(struct nvme_ns *ns) {}; 47384d4add7SMatias Bjørling static inline int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, 47484d4add7SMatias Bjørling unsigned long arg) 47584d4add7SMatias Bjørling { 47684d4add7SMatias Bjørling return -ENOTTY; 47784d4add7SMatias Bjørling } 4783dc87dd0SMatias Bjørling #endif /* CONFIG_NVM */ 4793dc87dd0SMatias Bjørling 48040267efdSSimon A. F. Lund static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev) 48140267efdSSimon A. F. Lund { 48240267efdSSimon A. F. Lund return dev_to_disk(dev)->private_data; 48340267efdSSimon A. F. Lund } 484ca064085SMatias Bjørling 4855bae7f73SChristoph Hellwig int __init nvme_core_init(void); 4865bae7f73SChristoph Hellwig void nvme_core_exit(void); 4875bae7f73SChristoph Hellwig 48857dacad5SJay Sternberg #endif /* _NVME_H */ 489