/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (c) 2011-2014, Intel Corporation. */ #ifndef _NVME_H #define _NVME_H #include <linux/nvme.h> #include <linux/cdev.h> #include <linux/pci.h> #include <linux/kref.h> #include <linux/blk-mq.h> #include <linux/sed-opal.h> #include <linux/fault-inject.h> #include <linux/rcupdate.h> #include <linux/wait.h> #include <linux/t10-pi.h> #include <linux/ratelimit_types.h> #include <trace/events/block.h> extern const struct pr_ops nvme_pr_ops; extern unsigned int nvme_io_timeout; #define NVME_IO_TIMEOUT … extern unsigned int admin_timeout; #define NVME_ADMIN_TIMEOUT … #define NVME_DEFAULT_KATO … #ifdef CONFIG_ARCH_NO_SG_CHAIN #define NVME_INLINE_SG_CNT … #define NVME_INLINE_METADATA_SG_CNT … #else #define NVME_INLINE_SG_CNT … #define NVME_INLINE_METADATA_SG_CNT … #endif /* * Default to a 4K page size, with the intention to update this * path in the future to accommodate architectures with differing * kernel and IO page sizes. */ #define NVME_CTRL_PAGE_SHIFT … #define NVME_CTRL_PAGE_SIZE … extern struct workqueue_struct *nvme_wq; extern struct workqueue_struct *nvme_reset_wq; extern struct workqueue_struct *nvme_delete_wq; extern struct mutex nvme_subsystems_lock; /* * List of workarounds for devices that required behavior not specified in * the standard. */ enum nvme_quirks { … }; /* * Common request structure for NVMe passthrough. All drivers must have * this structure as the first member of their request-private data. */ struct nvme_request { … }; /* * Mark a bio as coming in through the mpath node. */ #define REQ_NVME_MPATH … enum { … }; static inline struct nvme_request *nvme_req(struct request *req) { … } static inline u16 nvme_req_qid(struct request *req) { … } /* The below value is the specific amount of delay needed before checking * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was * found empirically. */ #define NVME_QUIRK_DELAY_AMOUNT … /* * enum nvme_ctrl_state: Controller state * * @NVME_CTRL_NEW: New controller just allocated, initial state * @NVME_CTRL_LIVE: Controller is connected and I/O capable * @NVME_CTRL_RESETTING: Controller is resetting (or scheduled reset) * @NVME_CTRL_CONNECTING: Controller is disconnected, now connecting the * transport * @NVME_CTRL_DELETING: Controller is deleting (or scheduled deletion) * @NVME_CTRL_DELETING_NOIO: Controller is deleting and I/O is not * disabled/failed immediately. This state comes * after all async event processing took place and * before ns removal and the controller deletion * progress * @NVME_CTRL_DEAD: Controller is non-present/unresponsive during * shutdown or removal. In this case we forcibly * kill all inflight I/O as they have no chance to * complete */ enum nvme_ctrl_state { … }; struct nvme_fault_inject { … }; enum nvme_ctrl_flags { … }; struct nvme_ctrl { … }; static inline enum nvme_ctrl_state nvme_ctrl_state(struct nvme_ctrl *ctrl) { … } enum nvme_iopolicy { … }; struct nvme_subsystem { … }; /* * Container structure for uniqueue namespace identifiers. */ struct nvme_ns_ids { … }; /* * Anchor structure for namespaces. There is one for each namespace in a * NVMe subsystem that any of our controllers can see, and the namespace * structure for each controller is chained of it. For private namespaces * there is a 1:1 relation to our namespace structures, that is ->list * only ever has a single entry for private namespaces. */ struct nvme_ns_head { … }; static inline bool nvme_ns_head_multipath(struct nvme_ns_head *head) { … } enum nvme_ns_features { … }; struct nvme_ns { … }; /* NVMe ns supports metadata actions by the controller (generate/strip) */ static inline bool nvme_ns_has_pi(struct nvme_ns_head *head) { … } struct nvme_ctrl_ops { … }; /* * nvme command_id is constructed as such: * | xxxx | xxxxxxxxxxxx | * gen request tag */ #define nvme_genctr_mask(gen) … #define nvme_cid_install_genctr(gen) … #define nvme_genctr_from_cid(cid) … #define nvme_tag_from_cid(cid) … static inline u16 nvme_cid(struct request *rq) { … } static inline struct request *nvme_find_rq(struct blk_mq_tags *tags, u16 command_id) { … } static inline struct request *nvme_cid_to_rq(struct blk_mq_tags *tags, u16 command_id) { … } /* * Return the length of the string without the space padding */ static inline int nvme_strlen(char *s, int len) { … } static inline void nvme_print_device_info(struct nvme_ctrl *ctrl) { … } #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj, const char *dev_name); void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject); void nvme_should_fail(struct request *req); #else static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj, const char *dev_name) { } static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj) { } static inline void nvme_should_fail(struct request *req) {} #endif bool nvme_wait_reset(struct nvme_ctrl *ctrl); int nvme_try_sched_reset(struct nvme_ctrl *ctrl); static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl) { … } /* * Convert a 512B sector number to a device logical block number. */ static inline u64 nvme_sect_to_lba(struct nvme_ns_head *head, sector_t sector) { … } /* * Convert a device logical block number to a 512B sector number. */ static inline sector_t nvme_lba_to_sect(struct nvme_ns_head *head, u64 lba) { … } /* * Convert byte length to nvme's 0-based num dwords */ static inline u32 nvme_bytes_to_numd(size_t len) { … } static inline bool nvme_is_ana_error(u16 status) { … } static inline bool nvme_is_path_error(u16 status) { … } /* * Fill in the status and result information from the CQE, and then figure out * if blk-mq will need to use IPI magic to complete the request, and if yes do * so. If not let the caller complete the request without an indirect function * call. */ static inline bool nvme_try_complete_req(struct request *req, __le16 status, union nvme_result result) { … } static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl) { … } static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl) { … } static inline bool nvme_is_aen_req(u16 qid, __u16 command_id) { … } /* * Returns true for sink states that can't ever transition back to live. */ static inline bool nvme_state_terminal(struct nvme_ctrl *ctrl) { … } void nvme_end_req(struct request *req); void nvme_complete_rq(struct request *req); void nvme_complete_batch_req(struct request *req); static __always_inline void nvme_complete_batch(struct io_comp_batch *iob, void (*fn)(struct request *rq)) { … } blk_status_t nvme_host_path_error(struct request *req); bool nvme_cancel_request(struct request *req, void *data); void nvme_cancel_tagset(struct nvme_ctrl *ctrl); void nvme_cancel_admin_tagset(struct nvme_ctrl *ctrl); bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, enum nvme_ctrl_state new_state); int nvme_disable_ctrl(struct nvme_ctrl *ctrl, bool shutdown); int nvme_enable_ctrl(struct nvme_ctrl *ctrl); int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, const struct nvme_ctrl_ops *ops, unsigned long quirks); int nvme_add_ctrl(struct nvme_ctrl *ctrl); void nvme_uninit_ctrl(struct nvme_ctrl *ctrl); void nvme_start_ctrl(struct nvme_ctrl *ctrl); void nvme_stop_ctrl(struct nvme_ctrl *ctrl); int nvme_init_ctrl_finish(struct nvme_ctrl *ctrl, bool was_suspended); int nvme_alloc_admin_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set, const struct blk_mq_ops *ops, unsigned int cmd_size); void nvme_remove_admin_tag_set(struct nvme_ctrl *ctrl); int nvme_alloc_io_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set, const struct blk_mq_ops *ops, unsigned int nr_maps, unsigned int cmd_size); void nvme_remove_io_tag_set(struct nvme_ctrl *ctrl); void nvme_remove_namespaces(struct nvme_ctrl *ctrl); void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status, volatile union nvme_result *res); void nvme_quiesce_io_queues(struct nvme_ctrl *ctrl); void nvme_unquiesce_io_queues(struct nvme_ctrl *ctrl); void nvme_quiesce_admin_queue(struct nvme_ctrl *ctrl); void nvme_unquiesce_admin_queue(struct nvme_ctrl *ctrl); void nvme_mark_namespaces_dead(struct nvme_ctrl *ctrl); void nvme_sync_queues(struct nvme_ctrl *ctrl); void nvme_sync_io_queues(struct nvme_ctrl *ctrl); void nvme_unfreeze(struct nvme_ctrl *ctrl); void nvme_wait_freeze(struct nvme_ctrl *ctrl); int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout); void nvme_start_freeze(struct nvme_ctrl *ctrl); static inline enum req_op nvme_req_op(struct nvme_command *cmd) { … } #define NVME_QID_ANY … void nvme_init_request(struct request *req, struct nvme_command *cmd); void nvme_cleanup_cmd(struct request *req); blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req); blk_status_t nvme_fail_nonready_command(struct nvme_ctrl *ctrl, struct request *req); bool __nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq, bool queue_live, enum nvme_ctrl_state state); static inline bool nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq, bool queue_live) { … } /* * NSID shall be unique for all shared namespaces, or if at least one of the * following conditions is met: * 1. Namespace Management is supported by the controller * 2. ANA is supported by the controller * 3. NVM Set are supported by the controller * * In other case, private namespace are not required to report a unique NSID. */ static inline bool nvme_is_unique_nsid(struct nvme_ctrl *ctrl, struct nvme_ns_head *head) { … } /* * Flags for __nvme_submit_sync_cmd() */ nvme_submit_flags_t; enum { … }; int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, void *buf, unsigned bufflen); int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, union nvme_result *result, void *buffer, unsigned bufflen, int qid, nvme_submit_flags_t flags); int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid, unsigned int dword11, void *buffer, size_t buflen, u32 *result); int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid, unsigned int dword11, void *buffer, size_t buflen, u32 *result); int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count); void nvme_stop_keep_alive(struct nvme_ctrl *ctrl); int nvme_reset_ctrl(struct nvme_ctrl *ctrl); int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl); int nvme_delete_ctrl(struct nvme_ctrl *ctrl); void nvme_queue_scan(struct nvme_ctrl *ctrl); int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi, void *log, size_t size, u64 offset); bool nvme_tryget_ns_head(struct nvme_ns_head *head); void nvme_put_ns_head(struct nvme_ns_head *head); int nvme_cdev_add(struct cdev *cdev, struct device *cdev_device, const struct file_operations *fops, struct module *owner); void nvme_cdev_del(struct cdev *cdev, struct device *cdev_device); int nvme_ioctl(struct block_device *bdev, blk_mode_t mode, unsigned int cmd, unsigned long arg); long nvme_ns_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg); int nvme_ns_head_ioctl(struct block_device *bdev, blk_mode_t mode, unsigned int cmd, unsigned long arg); long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg); long nvme_dev_ioctl(struct file *file, unsigned int cmd, unsigned long arg); int nvme_ns_chr_uring_cmd_iopoll(struct io_uring_cmd *ioucmd, struct io_comp_batch *iob, unsigned int poll_flags); int nvme_ns_chr_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags); int nvme_ns_head_chr_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags); int nvme_identify_ns(struct nvme_ctrl *ctrl, unsigned nsid, struct nvme_id_ns **id); int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo); int nvme_dev_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags); extern const struct attribute_group *nvme_ns_attr_groups[]; extern const struct pr_ops nvme_pr_ops; extern const struct block_device_operations nvme_ns_head_ops; extern const struct attribute_group nvme_dev_attrs_group; extern const struct attribute_group *nvme_subsys_attrs_groups[]; extern const struct attribute_group *nvme_dev_attr_groups[]; extern const struct block_device_operations nvme_bdev_ops; void nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl); struct nvme_ns *nvme_find_path(struct nvme_ns_head *head); #ifdef CONFIG_NVME_MULTIPATH static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl) { … } void nvme_mpath_unfreeze(struct nvme_subsystem *subsys); void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys); void nvme_mpath_start_freeze(struct nvme_subsystem *subsys); void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys); void nvme_failover_req(struct request *req); void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl); int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head); void nvme_mpath_add_disk(struct nvme_ns *ns, __le32 anagrpid); void nvme_mpath_remove_disk(struct nvme_ns_head *head); int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id); void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl); void nvme_mpath_update(struct nvme_ctrl *ctrl); void nvme_mpath_uninit(struct nvme_ctrl *ctrl); void nvme_mpath_stop(struct nvme_ctrl *ctrl); bool nvme_mpath_clear_current_path(struct nvme_ns *ns); void nvme_mpath_revalidate_paths(struct nvme_ns *ns); void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl); void nvme_mpath_shutdown_disk(struct nvme_ns_head *head); void nvme_mpath_start_request(struct request *rq); void nvme_mpath_end_request(struct request *rq); static inline void nvme_trace_bio_complete(struct request *req) { … } extern bool multipath; extern struct device_attribute dev_attr_ana_grpid; extern struct device_attribute dev_attr_ana_state; extern struct device_attribute subsys_attr_iopolicy; static inline bool nvme_disk_is_ns_head(struct gendisk *disk) { … } #else #define multipath … static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl) { return false; } static inline void nvme_failover_req(struct request *req) { } static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl) { } static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head) { return 0; } static inline void nvme_mpath_add_disk(struct nvme_ns *ns, __le32 anagrpid) { } static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head) { } static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns) { return false; } static inline void nvme_mpath_revalidate_paths(struct nvme_ns *ns) { } static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl) { } static inline void nvme_mpath_shutdown_disk(struct nvme_ns_head *head) { } static inline void nvme_trace_bio_complete(struct request *req) { } static inline void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl) { } static inline int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id) { if (ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA) dev_warn(ctrl->device, "Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n"); return 0; } static inline void nvme_mpath_update(struct nvme_ctrl *ctrl) { } static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl) { } static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl) { } static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys) { } static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys) { } static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys) { } static inline void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys) { } static inline void nvme_mpath_start_request(struct request *rq) { } static inline void nvme_mpath_end_request(struct request *rq) { } static inline bool nvme_disk_is_ns_head(struct gendisk *disk) { return false; } #endif /* CONFIG_NVME_MULTIPATH */ int nvme_ns_get_unique_id(struct nvme_ns *ns, u8 id[16], enum blk_unique_id type); struct nvme_zone_info { … }; int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector, unsigned int nr_zones, report_zones_cb cb, void *data); int nvme_query_zone_info(struct nvme_ns *ns, unsigned lbaf, struct nvme_zone_info *zi); void nvme_update_zone_info(struct nvme_ns *ns, struct queue_limits *lim, struct nvme_zone_info *zi); #ifdef CONFIG_BLK_DEV_ZONED blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req, struct nvme_command *cmnd, enum nvme_zone_mgmt_action action); #else static inline blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req, struct nvme_command *cmnd, enum nvme_zone_mgmt_action action) { return BLK_STS_NOTSUPP; } #endif static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev) { … } #ifdef CONFIG_NVME_HWMON int nvme_hwmon_init(struct nvme_ctrl *ctrl); void nvme_hwmon_exit(struct nvme_ctrl *ctrl); #else static inline int nvme_hwmon_init(struct nvme_ctrl *ctrl) { return 0; } static inline void nvme_hwmon_exit(struct nvme_ctrl *ctrl) { } #endif static inline void nvme_start_request(struct request *rq) { … } static inline bool nvme_ctrl_sgl_supported(struct nvme_ctrl *ctrl) { … } #ifdef CONFIG_NVME_HOST_AUTH int __init nvme_init_auth(void); void __exit nvme_exit_auth(void); int nvme_auth_init_ctrl(struct nvme_ctrl *ctrl); void nvme_auth_stop(struct nvme_ctrl *ctrl); int nvme_auth_negotiate(struct nvme_ctrl *ctrl, int qid); int nvme_auth_wait(struct nvme_ctrl *ctrl, int qid); void nvme_auth_free(struct nvme_ctrl *ctrl); #else static inline int nvme_auth_init_ctrl(struct nvme_ctrl *ctrl) { return 0; } static inline int __init nvme_init_auth(void) { return 0; } static inline void __exit nvme_exit_auth(void) { } static inline void nvme_auth_stop(struct nvme_ctrl *ctrl) {}; static inline int nvme_auth_negotiate(struct nvme_ctrl *ctrl, int qid) { return -EPROTONOSUPPORT; } static inline int nvme_auth_wait(struct nvme_ctrl *ctrl, int qid) { return -EPROTONOSUPPORT; } static inline void nvme_auth_free(struct nvme_ctrl *ctrl) {}; #endif u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u8 opcode); u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u8 opcode); int nvme_execute_rq(struct request *rq, bool at_head); void nvme_passthru_end(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u32 effects, struct nvme_command *cmd, int status); struct nvme_ctrl *nvme_ctrl_from_file(struct file *file); struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid); bool nvme_get_ns(struct nvme_ns *ns); void nvme_put_ns(struct nvme_ns *ns); static inline bool nvme_multi_css(struct nvme_ctrl *ctrl) { … } #ifdef CONFIG_NVME_VERBOSE_ERRORS const char *nvme_get_error_status_str(u16 status); const char *nvme_get_opcode_str(u8 opcode); const char *nvme_get_admin_opcode_str(u8 opcode); const char *nvme_get_fabrics_opcode_str(u8 opcode); #else /* CONFIG_NVME_VERBOSE_ERRORS */ static inline const char *nvme_get_error_status_str(u16 status) { return "I/O Error"; } static inline const char *nvme_get_opcode_str(u8 opcode) { return "I/O Cmd"; } static inline const char *nvme_get_admin_opcode_str(u8 opcode) { return "Admin Cmd"; } static inline const char *nvme_get_fabrics_opcode_str(u8 opcode) { return "Fabrics Cmd"; } #endif /* CONFIG_NVME_VERBOSE_ERRORS */ static inline const char *nvme_opcode_str(int qid, u8 opcode) { … } static inline const char *nvme_fabrics_opcode_str( int qid, const struct nvme_command *cmd) { … } #endif /* _NVME_H */
Codebase Browser
linux