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> 1857dacad5SJay Sternberg #include <linux/pci.h> 1957dacad5SJay Sternberg #include <linux/kref.h> 2057dacad5SJay Sternberg #include <linux/blk-mq.h> 21b0b4e09cSMatias Bjørling #include <linux/lightnvm.h> 22a98e58e5SScott Bauer #include <linux/sed-opal.h> 2357dacad5SJay Sternberg 24297465c8SChristoph Hellwig enum { 25297465c8SChristoph Hellwig /* 26297465c8SChristoph Hellwig * Driver internal status code for commands that were cancelled due 27297465c8SChristoph Hellwig * to timeouts or controller shutdown. The value is negative so 28297465c8SChristoph Hellwig * that it a) doesn't overlap with the unsigned hardware error codes, 29297465c8SChristoph Hellwig * and b) can easily be tested for. 30297465c8SChristoph Hellwig */ 31297465c8SChristoph Hellwig NVME_SC_CANCELLED = -EINTR, 32297465c8SChristoph Hellwig }; 33297465c8SChristoph Hellwig 3457dacad5SJay Sternberg extern unsigned char nvme_io_timeout; 3557dacad5SJay Sternberg #define NVME_IO_TIMEOUT (nvme_io_timeout * HZ) 3657dacad5SJay Sternberg 3721d34711SChristoph Hellwig extern unsigned char admin_timeout; 3821d34711SChristoph Hellwig #define ADMIN_TIMEOUT (admin_timeout * HZ) 3921d34711SChristoph Hellwig 405fd4ce1bSChristoph Hellwig extern unsigned char shutdown_timeout; 415fd4ce1bSChristoph Hellwig #define SHUTDOWN_TIMEOUT (shutdown_timeout * HZ) 425fd4ce1bSChristoph Hellwig 43038bd4cbSSagi Grimberg #define NVME_DEFAULT_KATO 5 44038bd4cbSSagi Grimberg #define NVME_KATO_GRACE 10 45038bd4cbSSagi Grimberg 46f80ec966SKeith Busch extern unsigned int nvme_max_retries; 47f80ec966SKeith Busch 48ca064085SMatias Bjørling enum { 49ca064085SMatias Bjørling NVME_NS_LBA = 0, 50ca064085SMatias Bjørling NVME_NS_LIGHTNVM = 1, 51ca064085SMatias Bjørling }; 52ca064085SMatias Bjørling 5357dacad5SJay Sternberg /* 54106198edSChristoph Hellwig * List of workarounds for devices that required behavior not specified in 55106198edSChristoph Hellwig * the standard. 5657dacad5SJay Sternberg */ 57106198edSChristoph Hellwig enum nvme_quirks { 58106198edSChristoph Hellwig /* 59106198edSChristoph Hellwig * Prefers I/O aligned to a stripe size specified in a vendor 60106198edSChristoph Hellwig * specific Identify field. 61106198edSChristoph Hellwig */ 62106198edSChristoph Hellwig NVME_QUIRK_STRIPE_SIZE = (1 << 0), 63540c801cSKeith Busch 64540c801cSKeith Busch /* 65540c801cSKeith Busch * The controller doesn't handle Identify value others than 0 or 1 66540c801cSKeith Busch * correctly. 67540c801cSKeith Busch */ 68540c801cSKeith Busch NVME_QUIRK_IDENTIFY_CNS = (1 << 1), 6908095e70SKeith Busch 7008095e70SKeith Busch /* 7108095e70SKeith Busch * The controller deterministically returns O's on reads to discarded 7208095e70SKeith Busch * logical blocks. 7308095e70SKeith Busch */ 7408095e70SKeith Busch NVME_QUIRK_DISCARD_ZEROES = (1 << 2), 7554adc010SGuilherme G. Piccoli 7654adc010SGuilherme G. Piccoli /* 7754adc010SGuilherme G. Piccoli * The controller needs a delay before starts checking the device 7854adc010SGuilherme G. Piccoli * readiness, which is done by reading the NVME_CSTS_RDY bit. 7954adc010SGuilherme G. Piccoli */ 8054adc010SGuilherme G. Piccoli NVME_QUIRK_DELAY_BEFORE_CHK_RDY = (1 << 3), 81106198edSChristoph Hellwig }; 82106198edSChristoph Hellwig 83d49187e9SChristoph Hellwig /* 84d49187e9SChristoph Hellwig * Common request structure for NVMe passthrough. All drivers must have 85d49187e9SChristoph Hellwig * this structure as the first member of their request-private data. 86d49187e9SChristoph Hellwig */ 87d49187e9SChristoph Hellwig struct nvme_request { 88d49187e9SChristoph Hellwig struct nvme_command *cmd; 89d49187e9SChristoph Hellwig union nvme_result result; 90d49187e9SChristoph Hellwig }; 91d49187e9SChristoph Hellwig 92d49187e9SChristoph Hellwig static inline struct nvme_request *nvme_req(struct request *req) 93d49187e9SChristoph Hellwig { 94d49187e9SChristoph Hellwig return blk_mq_rq_to_pdu(req); 95d49187e9SChristoph Hellwig } 96d49187e9SChristoph Hellwig 9754adc010SGuilherme G. Piccoli /* The below value is the specific amount of delay needed before checking 9854adc010SGuilherme G. Piccoli * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the 9954adc010SGuilherme G. Piccoli * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was 10054adc010SGuilherme G. Piccoli * found empirically. 10154adc010SGuilherme G. Piccoli */ 10254adc010SGuilherme G. Piccoli #define NVME_QUIRK_DELAY_AMOUNT 2000 10354adc010SGuilherme G. Piccoli 104bb8d261eSChristoph Hellwig enum nvme_ctrl_state { 105bb8d261eSChristoph Hellwig NVME_CTRL_NEW, 106bb8d261eSChristoph Hellwig NVME_CTRL_LIVE, 107bb8d261eSChristoph Hellwig NVME_CTRL_RESETTING, 108def61ecaSChristoph Hellwig NVME_CTRL_RECONNECTING, 109bb8d261eSChristoph Hellwig NVME_CTRL_DELETING, 1100ff9d4e1SKeith Busch NVME_CTRL_DEAD, 111bb8d261eSChristoph Hellwig }; 112bb8d261eSChristoph Hellwig 1131c63dc66SChristoph Hellwig struct nvme_ctrl { 114bb8d261eSChristoph Hellwig enum nvme_ctrl_state state; 115bb8d261eSChristoph Hellwig spinlock_t lock; 1161c63dc66SChristoph Hellwig const struct nvme_ctrl_ops *ops; 11757dacad5SJay Sternberg struct request_queue *admin_q; 11807bfcd09SChristoph Hellwig struct request_queue *connect_q; 11957dacad5SJay Sternberg struct device *dev; 12057dacad5SJay Sternberg struct kref kref; 12157dacad5SJay Sternberg int instance; 1225bae7f73SChristoph Hellwig struct blk_mq_tag_set *tagset; 1235bae7f73SChristoph Hellwig struct list_head namespaces; 12469d3b8acSChristoph Hellwig struct mutex namespaces_mutex; 1255bae7f73SChristoph Hellwig struct device *device; /* char device */ 126f3ca80fcSChristoph Hellwig struct list_head node; 127075790ebSKeith Busch struct ida ns_ida; 1281c63dc66SChristoph Hellwig 1294f1244c8SChristoph Hellwig struct opal_dev *opal_dev; 130a98e58e5SScott Bauer 13157dacad5SJay Sternberg char name[12]; 13257dacad5SJay Sternberg char serial[20]; 13357dacad5SJay Sternberg char model[40]; 13457dacad5SJay Sternberg char firmware_rev[8]; 13576e3914aSChristoph Hellwig u16 cntlid; 1365fd4ce1bSChristoph Hellwig 1375fd4ce1bSChristoph Hellwig u32 ctrl_config; 1385fd4ce1bSChristoph Hellwig 1395fd4ce1bSChristoph Hellwig u32 page_size; 14057dacad5SJay Sternberg u32 max_hw_sectors; 14157dacad5SJay Sternberg u16 oncs; 142118472abSKeith Busch u16 vid; 1438a9ae523SScott Bauer u16 oacs; 1446bf25d16SChristoph Hellwig atomic_t abort_limit; 14557dacad5SJay Sternberg u8 event_limit; 14657dacad5SJay Sternberg u8 vwc; 147f3ca80fcSChristoph Hellwig u32 vs; 14807bfcd09SChristoph Hellwig u32 sgls; 149038bd4cbSSagi Grimberg u16 kas; 150038bd4cbSSagi Grimberg unsigned int kato; 151f3ca80fcSChristoph Hellwig bool subsystem; 152106198edSChristoph Hellwig unsigned long quirks; 1535955be21SChristoph Hellwig struct work_struct scan_work; 154f866fc42SChristoph Hellwig struct work_struct async_event_work; 155038bd4cbSSagi Grimberg struct delayed_work ka_work; 15607bfcd09SChristoph Hellwig 15707bfcd09SChristoph Hellwig /* Fabrics only */ 15807bfcd09SChristoph Hellwig u16 sqsize; 15907bfcd09SChristoph Hellwig u32 ioccsz; 16007bfcd09SChristoph Hellwig u32 iorcsz; 16107bfcd09SChristoph Hellwig u16 icdoff; 16207bfcd09SChristoph Hellwig u16 maxcmd; 16307bfcd09SChristoph Hellwig struct nvmf_ctrl_options *opts; 16457dacad5SJay Sternberg }; 16557dacad5SJay Sternberg 16657dacad5SJay Sternberg /* 16757dacad5SJay Sternberg * An NVM Express namespace is equivalent to a SCSI LUN 16857dacad5SJay Sternberg */ 16957dacad5SJay Sternberg struct nvme_ns { 17057dacad5SJay Sternberg struct list_head list; 17157dacad5SJay Sternberg 1721c63dc66SChristoph Hellwig struct nvme_ctrl *ctrl; 17357dacad5SJay Sternberg struct request_queue *queue; 17457dacad5SJay Sternberg struct gendisk *disk; 175b0b4e09cSMatias Bjørling struct nvm_dev *ndev; 17657dacad5SJay Sternberg struct kref kref; 177075790ebSKeith Busch int instance; 17857dacad5SJay Sternberg 1792b9b6e86SKeith Busch u8 eui[8]; 1802b9b6e86SKeith Busch u8 uuid[16]; 1812b9b6e86SKeith Busch 18257dacad5SJay Sternberg unsigned ns_id; 18357dacad5SJay Sternberg int lba_shift; 18457dacad5SJay Sternberg u16 ms; 18557dacad5SJay Sternberg bool ext; 18657dacad5SJay Sternberg u8 pi_type; 187646017a6SKeith Busch unsigned long flags; 188646017a6SKeith Busch 189646017a6SKeith Busch #define NVME_NS_REMOVING 0 19069d9a99cSKeith Busch #define NVME_NS_DEAD 1 191646017a6SKeith Busch 19257dacad5SJay Sternberg u64 mode_select_num_blocks; 19357dacad5SJay Sternberg u32 mode_select_block_len; 19457dacad5SJay Sternberg }; 19557dacad5SJay Sternberg 1961c63dc66SChristoph Hellwig struct nvme_ctrl_ops { 1971a353d85SMing Lin const char *name; 198e439bb12SSagi Grimberg struct module *module; 19907bfcd09SChristoph Hellwig bool is_fabrics; 2001c63dc66SChristoph Hellwig int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val); 2015fd4ce1bSChristoph Hellwig int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val); 2027fd8930fSChristoph Hellwig int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val); 203f3ca80fcSChristoph Hellwig int (*reset_ctrl)(struct nvme_ctrl *ctrl); 2041673f1f0SChristoph Hellwig void (*free_ctrl)(struct nvme_ctrl *ctrl); 205f866fc42SChristoph Hellwig void (*submit_async_event)(struct nvme_ctrl *ctrl, int aer_idx); 2061a353d85SMing Lin int (*delete_ctrl)(struct nvme_ctrl *ctrl); 2071a353d85SMing Lin const char *(*get_subsysnqn)(struct nvme_ctrl *ctrl); 2081a353d85SMing Lin int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size); 20957dacad5SJay Sternberg }; 21057dacad5SJay Sternberg 2111c63dc66SChristoph Hellwig static inline bool nvme_ctrl_ready(struct nvme_ctrl *ctrl) 2121c63dc66SChristoph Hellwig { 2131c63dc66SChristoph Hellwig u32 val = 0; 2141c63dc66SChristoph Hellwig 2151c63dc66SChristoph Hellwig if (ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &val)) 2161c63dc66SChristoph Hellwig return false; 2171c63dc66SChristoph Hellwig return val & NVME_CSTS_RDY; 2181c63dc66SChristoph Hellwig } 2191c63dc66SChristoph Hellwig 220f3ca80fcSChristoph Hellwig static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl) 221f3ca80fcSChristoph Hellwig { 222f3ca80fcSChristoph Hellwig if (!ctrl->subsystem) 223f3ca80fcSChristoph Hellwig return -ENOTTY; 224f3ca80fcSChristoph Hellwig return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65); 225f3ca80fcSChristoph Hellwig } 226f3ca80fcSChristoph Hellwig 22757dacad5SJay Sternberg static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector) 22857dacad5SJay Sternberg { 22957dacad5SJay Sternberg return (sector >> (ns->lba_shift - 9)); 23057dacad5SJay Sternberg } 23157dacad5SJay Sternberg 23258b45602SMing Lin static inline unsigned nvme_map_len(struct request *rq) 23358b45602SMing Lin { 234c2df40dfSMike Christie if (req_op(rq) == REQ_OP_DISCARD) 23558b45602SMing Lin return sizeof(struct nvme_dsm_range); 23658b45602SMing Lin else 23758b45602SMing Lin return blk_rq_bytes(rq); 23858b45602SMing Lin } 23958b45602SMing Lin 2406904242dSMing Lin static inline void nvme_cleanup_cmd(struct request *req) 2416904242dSMing Lin { 242f9d03f96SChristoph Hellwig if (req->rq_flags & RQF_SPECIAL_PAYLOAD) { 243f9d03f96SChristoph Hellwig kfree(page_address(req->special_vec.bv_page) + 244f9d03f96SChristoph Hellwig req->special_vec.bv_offset); 245f9d03f96SChristoph Hellwig } 2466904242dSMing Lin } 2476904242dSMing Lin 24815a190f7SChristoph Hellwig static inline int nvme_error_status(u16 status) 24915a190f7SChristoph Hellwig { 25015a190f7SChristoph Hellwig switch (status & 0x7ff) { 25115a190f7SChristoph Hellwig case NVME_SC_SUCCESS: 25215a190f7SChristoph Hellwig return 0; 25315a190f7SChristoph Hellwig case NVME_SC_CAP_EXCEEDED: 25415a190f7SChristoph Hellwig return -ENOSPC; 25515a190f7SChristoph Hellwig default: 25615a190f7SChristoph Hellwig return -EIO; 25715a190f7SChristoph Hellwig } 25815a190f7SChristoph Hellwig } 25915a190f7SChristoph Hellwig 2607688faa6SChristoph Hellwig static inline bool nvme_req_needs_retry(struct request *req, u16 status) 2617688faa6SChristoph Hellwig { 2627688faa6SChristoph Hellwig return !(status & NVME_SC_DNR || blk_noretry_request(req)) && 263f80ec966SKeith Busch (jiffies - req->start_time) < req->timeout && 264f80ec966SKeith Busch req->retries < nvme_max_retries; 2657688faa6SChristoph Hellwig } 2667688faa6SChristoph Hellwig 267c55a2fd4SMing Lin void nvme_cancel_request(struct request *req, void *data, bool reserved); 268bb8d261eSChristoph Hellwig bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, 269bb8d261eSChristoph Hellwig enum nvme_ctrl_state new_state); 2705fd4ce1bSChristoph Hellwig int nvme_disable_ctrl(struct nvme_ctrl *ctrl, u64 cap); 2715fd4ce1bSChristoph Hellwig int nvme_enable_ctrl(struct nvme_ctrl *ctrl, u64 cap); 2725fd4ce1bSChristoph Hellwig int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl); 273f3ca80fcSChristoph Hellwig int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, 274f3ca80fcSChristoph Hellwig const struct nvme_ctrl_ops *ops, unsigned long quirks); 27553029b04SKeith Busch void nvme_uninit_ctrl(struct nvme_ctrl *ctrl); 2761673f1f0SChristoph Hellwig void nvme_put_ctrl(struct nvme_ctrl *ctrl); 2777fd8930fSChristoph Hellwig int nvme_init_identify(struct nvme_ctrl *ctrl); 2785bae7f73SChristoph Hellwig 2795955be21SChristoph Hellwig void nvme_queue_scan(struct nvme_ctrl *ctrl); 2805bae7f73SChristoph Hellwig void nvme_remove_namespaces(struct nvme_ctrl *ctrl); 2811673f1f0SChristoph Hellwig 2824f1244c8SChristoph Hellwig int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len, 2834f1244c8SChristoph Hellwig bool send); 284a98e58e5SScott Bauer 285f866fc42SChristoph Hellwig #define NVME_NR_AERS 1 2867bf58533SChristoph Hellwig void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status, 2877bf58533SChristoph Hellwig union nvme_result *res); 288f866fc42SChristoph Hellwig void nvme_queue_async_events(struct nvme_ctrl *ctrl); 289f866fc42SChristoph Hellwig 29025646264SKeith Busch void nvme_stop_queues(struct nvme_ctrl *ctrl); 29125646264SKeith Busch void nvme_start_queues(struct nvme_ctrl *ctrl); 29269d9a99cSKeith Busch void nvme_kill_queues(struct nvme_ctrl *ctrl); 293363c9aacSSagi Grimberg 294eb71f435SChristoph Hellwig #define NVME_QID_ANY -1 2954160982eSChristoph Hellwig struct request *nvme_alloc_request(struct request_queue *q, 296eb71f435SChristoph Hellwig struct nvme_command *cmd, unsigned int flags, int qid); 2977688faa6SChristoph Hellwig void nvme_requeue_req(struct request *req); 2988093f7caSMing Lin int nvme_setup_cmd(struct nvme_ns *ns, struct request *req, 2998093f7caSMing Lin struct nvme_command *cmd); 30057dacad5SJay Sternberg int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, 30157dacad5SJay Sternberg void *buf, unsigned bufflen); 30257dacad5SJay Sternberg int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, 303d49187e9SChristoph Hellwig union nvme_result *result, void *buffer, unsigned bufflen, 304eb71f435SChristoph Hellwig unsigned timeout, int qid, int at_head, int flags); 3054160982eSChristoph Hellwig int nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd, 3064160982eSChristoph Hellwig void __user *ubuffer, unsigned bufflen, u32 *result, 3074160982eSChristoph Hellwig unsigned timeout); 3080b7f1f26SKeith Busch int __nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd, 3090b7f1f26SKeith Busch void __user *ubuffer, unsigned bufflen, 3100b7f1f26SKeith Busch void __user *meta_buffer, unsigned meta_len, u32 meta_seed, 31157dacad5SJay Sternberg u32 *result, unsigned timeout); 3121c63dc66SChristoph Hellwig int nvme_identify_ctrl(struct nvme_ctrl *dev, struct nvme_id_ctrl **id); 3131c63dc66SChristoph Hellwig int nvme_identify_ns(struct nvme_ctrl *dev, unsigned nsid, 31457dacad5SJay Sternberg struct nvme_id_ns **id); 3151c63dc66SChristoph Hellwig int nvme_get_log_page(struct nvme_ctrl *dev, struct nvme_smart_log **log); 3161c63dc66SChristoph Hellwig int nvme_get_features(struct nvme_ctrl *dev, unsigned fid, unsigned nsid, 3171a6fe74dSAndy Lutomirski void *buffer, size_t buflen, u32 *result); 3181c63dc66SChristoph Hellwig int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11, 3191a6fe74dSAndy Lutomirski void *buffer, size_t buflen, u32 *result); 3209a0be7abSChristoph Hellwig int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count); 321038bd4cbSSagi Grimberg void nvme_start_keep_alive(struct nvme_ctrl *ctrl); 322038bd4cbSSagi Grimberg void nvme_stop_keep_alive(struct nvme_ctrl *ctrl); 32357dacad5SJay Sternberg 32457dacad5SJay Sternberg struct sg_io_hdr; 32557dacad5SJay Sternberg 32657dacad5SJay Sternberg int nvme_sg_io(struct nvme_ns *ns, struct sg_io_hdr __user *u_hdr); 32757dacad5SJay Sternberg int nvme_sg_io32(struct nvme_ns *ns, unsigned long arg); 32857dacad5SJay Sternberg int nvme_sg_get_version_num(int __user *ip); 32957dacad5SJay Sternberg 330c4699e70SKeith Busch #ifdef CONFIG_NVM 331ca064085SMatias Bjørling int nvme_nvm_ns_supported(struct nvme_ns *ns, struct nvme_id_ns *id); 3323dc87dd0SMatias Bjørling int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node); 333b0b4e09cSMatias Bjørling void nvme_nvm_unregister(struct nvme_ns *ns); 3343dc87dd0SMatias Bjørling int nvme_nvm_register_sysfs(struct nvme_ns *ns); 3353dc87dd0SMatias Bjørling void nvme_nvm_unregister_sysfs(struct nvme_ns *ns); 33684d4add7SMatias Bjørling int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg); 337c4699e70SKeith Busch #else 338b0b4e09cSMatias Bjørling static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, 3393dc87dd0SMatias Bjørling int node) 340c4699e70SKeith Busch { 341c4699e70SKeith Busch return 0; 342c4699e70SKeith Busch } 343c4699e70SKeith Busch 344b0b4e09cSMatias Bjørling static inline void nvme_nvm_unregister(struct nvme_ns *ns) {}; 3453dc87dd0SMatias Bjørling static inline int nvme_nvm_register_sysfs(struct nvme_ns *ns) 3463dc87dd0SMatias Bjørling { 3473dc87dd0SMatias Bjørling return 0; 3483dc87dd0SMatias Bjørling } 3493dc87dd0SMatias Bjørling static inline void nvme_nvm_unregister_sysfs(struct nvme_ns *ns) {}; 350c4699e70SKeith Busch static inline int nvme_nvm_ns_supported(struct nvme_ns *ns, struct nvme_id_ns *id) 351c4699e70SKeith Busch { 352c4699e70SKeith Busch return 0; 353c4699e70SKeith Busch } 35484d4add7SMatias Bjørling static inline int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, 35584d4add7SMatias Bjørling unsigned long arg) 35684d4add7SMatias Bjørling { 35784d4add7SMatias Bjørling return -ENOTTY; 35884d4add7SMatias Bjørling } 3593dc87dd0SMatias Bjørling #endif /* CONFIG_NVM */ 3603dc87dd0SMatias Bjørling 36140267efdSSimon A. F. Lund static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev) 36240267efdSSimon A. F. Lund { 36340267efdSSimon A. F. Lund return dev_to_disk(dev)->private_data; 36440267efdSSimon A. F. Lund } 365ca064085SMatias Bjørling 3665bae7f73SChristoph Hellwig int __init nvme_core_init(void); 3675bae7f73SChristoph Hellwig void nvme_core_exit(void); 3685bae7f73SChristoph Hellwig 36957dacad5SJay Sternberg #endif /* _NVME_H */ 370