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- /* 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/lightnvm.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 <trace/events/block.h>
- extern unsigned int nvme_io_timeout;
- #define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)
- extern unsigned int admin_timeout;
- #define ADMIN_TIMEOUT (admin_timeout * HZ)
- #define NVME_DEFAULT_KATO 5
- #define NVME_KATO_GRACE 10
- #ifdef CONFIG_ARCH_NO_SG_CHAIN
- #define NVME_INLINE_SG_CNT 0
- #define NVME_INLINE_METADATA_SG_CNT 0
- #else
- #define NVME_INLINE_SG_CNT 2
- #define NVME_INLINE_METADATA_SG_CNT 1
- #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 12
- #define NVME_CTRL_PAGE_SIZE (1 << NVME_CTRL_PAGE_SHIFT)
- extern struct workqueue_struct *nvme_wq;
- extern struct workqueue_struct *nvme_reset_wq;
- extern struct workqueue_struct *nvme_delete_wq;
- enum {
- NVME_NS_LBA = 0,
- NVME_NS_LIGHTNVM = 1,
- };
- /*
- * List of workarounds for devices that required behavior not specified in
- * the standard.
- */
- enum nvme_quirks {
- /*
- * Prefers I/O aligned to a stripe size specified in a vendor
- * specific Identify field.
- */
- NVME_QUIRK_STRIPE_SIZE = (1 << 0),
- /*
- * The controller doesn't handle Identify value others than 0 or 1
- * correctly.
- */
- NVME_QUIRK_IDENTIFY_CNS = (1 << 1),
- /*
- * The controller deterministically returns O's on reads to
- * logical blocks that deallocate was called on.
- */
- NVME_QUIRK_DEALLOCATE_ZEROES = (1 << 2),
- /*
- * The controller needs a delay before starts checking the device
- * readiness, which is done by reading the NVME_CSTS_RDY bit.
- */
- NVME_QUIRK_DELAY_BEFORE_CHK_RDY = (1 << 3),
- /*
- * APST should not be used.
- */
- NVME_QUIRK_NO_APST = (1 << 4),
- /*
- * The deepest sleep state should not be used.
- */
- NVME_QUIRK_NO_DEEPEST_PS = (1 << 5),
- /*
- * Supports the LighNVM command set if indicated in vs[1].
- */
- NVME_QUIRK_LIGHTNVM = (1 << 6),
- /*
- * Set MEDIUM priority on SQ creation
- */
- NVME_QUIRK_MEDIUM_PRIO_SQ = (1 << 7),
- /*
- * Ignore device provided subnqn.
- */
- NVME_QUIRK_IGNORE_DEV_SUBNQN = (1 << 8),
- /*
- * Broken Write Zeroes.
- */
- NVME_QUIRK_DISABLE_WRITE_ZEROES = (1 << 9),
- /*
- * Force simple suspend/resume path.
- */
- NVME_QUIRK_SIMPLE_SUSPEND = (1 << 10),
- /*
- * Use only one interrupt vector for all queues
- */
- NVME_QUIRK_SINGLE_VECTOR = (1 << 11),
- /*
- * Use non-standard 128 bytes SQEs.
- */
- NVME_QUIRK_128_BYTES_SQES = (1 << 12),
- /*
- * Prevent tag overlap between queues
- */
- NVME_QUIRK_SHARED_TAGS = (1 << 13),
- /*
- * Don't change the value of the temperature threshold feature
- */
- NVME_QUIRK_NO_TEMP_THRESH_CHANGE = (1 << 14),
- /*
- * The controller doesn't handle the Identify Namespace
- * Identification Descriptor list subcommand despite claiming
- * NVMe 1.3 compliance.
- */
- NVME_QUIRK_NO_NS_DESC_LIST = (1 << 15),
- /*
- * The controller requires the command_id value be be limited, so skip
- * encoding the generation sequence number.
- */
- NVME_QUIRK_SKIP_CID_GEN = (1 << 17),
- /*
- * Reports garbage in the namespace identifiers (eui64, nguid, uuid).
- */
- NVME_QUIRK_BOGUS_NID = (1 << 18),
- };
- /*
- * Common request structure for NVMe passthrough. All drivers must have
- * this structure as the first member of their request-private data.
- */
- struct nvme_request {
- struct nvme_command *cmd;
- union nvme_result result;
- u8 genctr;
- u8 retries;
- u8 flags;
- u16 status;
- struct nvme_ctrl *ctrl;
- };
- /*
- * Mark a bio as coming in through the mpath node.
- */
- #define REQ_NVME_MPATH REQ_DRV
- enum {
- NVME_REQ_CANCELLED = (1 << 0),
- NVME_REQ_USERCMD = (1 << 1),
- };
- static inline struct nvme_request *nvme_req(struct request *req)
- {
- return blk_mq_rq_to_pdu(req);
- }
- static inline u16 nvme_req_qid(struct request *req)
- {
- if (!req->q->queuedata)
- return 0;
- return blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(req)) + 1;
- }
- /* 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 2300
- /*
- * 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 {
- NVME_CTRL_NEW,
- NVME_CTRL_LIVE,
- NVME_CTRL_RESETTING,
- NVME_CTRL_CONNECTING,
- NVME_CTRL_DELETING,
- NVME_CTRL_DELETING_NOIO,
- NVME_CTRL_DEAD,
- };
- struct nvme_fault_inject {
- #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
- struct fault_attr attr;
- struct dentry *parent;
- bool dont_retry; /* DNR, do not retry */
- u16 status; /* status code */
- #endif
- };
- struct nvme_ctrl {
- bool comp_seen;
- enum nvme_ctrl_state state;
- bool identified;
- spinlock_t lock;
- struct mutex scan_lock;
- const struct nvme_ctrl_ops *ops;
- struct request_queue *admin_q;
- struct request_queue *connect_q;
- struct request_queue *fabrics_q;
- struct device *dev;
- int instance;
- int numa_node;
- struct blk_mq_tag_set *tagset;
- struct blk_mq_tag_set *admin_tagset;
- struct list_head namespaces;
- struct rw_semaphore namespaces_rwsem;
- struct device ctrl_device;
- struct device *device; /* char device */
- struct cdev cdev;
- struct work_struct reset_work;
- struct work_struct delete_work;
- wait_queue_head_t state_wq;
- struct nvme_subsystem *subsys;
- struct list_head subsys_entry;
- struct opal_dev *opal_dev;
- char name[12];
- u16 cntlid;
- u32 ctrl_config;
- u16 mtfa;
- u32 queue_count;
- u64 cap;
- u32 max_hw_sectors;
- u32 max_segments;
- u32 max_integrity_segments;
- #ifdef CONFIG_BLK_DEV_ZONED
- u32 max_zone_append;
- #endif
- u16 crdt[3];
- u16 oncs;
- u16 oacs;
- u16 nssa;
- u16 nr_streams;
- u16 sqsize;
- u32 max_namespaces;
- atomic_t abort_limit;
- u8 vwc;
- u32 vs;
- u32 sgls;
- u16 kas;
- u8 npss;
- u8 apsta;
- u16 wctemp;
- u16 cctemp;
- u32 oaes;
- u32 aen_result;
- u32 ctratt;
- unsigned int shutdown_timeout;
- unsigned int kato;
- bool subsystem;
- unsigned long quirks;
- struct nvme_id_power_state psd[32];
- struct nvme_effects_log *effects;
- struct xarray cels;
- struct work_struct scan_work;
- struct work_struct async_event_work;
- struct delayed_work ka_work;
- struct nvme_command ka_cmd;
- struct work_struct fw_act_work;
- unsigned long events;
- #ifdef CONFIG_NVME_MULTIPATH
- /* asymmetric namespace access: */
- u8 anacap;
- u8 anatt;
- u32 anagrpmax;
- u32 nanagrpid;
- struct mutex ana_lock;
- struct nvme_ana_rsp_hdr *ana_log_buf;
- size_t ana_log_size;
- struct timer_list anatt_timer;
- struct work_struct ana_work;
- #endif
- /* Power saving configuration */
- u64 ps_max_latency_us;
- bool apst_enabled;
- /* PCIe only: */
- u32 hmpre;
- u32 hmmin;
- u32 hmminds;
- u16 hmmaxd;
- /* Fabrics only */
- u32 ioccsz;
- u32 iorcsz;
- u16 icdoff;
- u16 maxcmd;
- int nr_reconnects;
- struct nvmf_ctrl_options *opts;
- struct page *discard_page;
- unsigned long discard_page_busy;
- struct nvme_fault_inject fault_inject;
- };
- enum nvme_iopolicy {
- NVME_IOPOLICY_NUMA,
- NVME_IOPOLICY_RR,
- };
- struct nvme_subsystem {
- int instance;
- struct device dev;
- /*
- * Because we unregister the device on the last put we need
- * a separate refcount.
- */
- struct kref ref;
- struct list_head entry;
- struct mutex lock;
- struct list_head ctrls;
- struct list_head nsheads;
- char subnqn[NVMF_NQN_SIZE];
- char serial[20];
- char model[40];
- char firmware_rev[8];
- u8 cmic;
- u16 vendor_id;
- u16 awupf; /* 0's based awupf value. */
- struct ida ns_ida;
- #ifdef CONFIG_NVME_MULTIPATH
- enum nvme_iopolicy iopolicy;
- #endif
- };
- /*
- * Container structure for uniqueue namespace identifiers.
- */
- struct nvme_ns_ids {
- u8 eui64[8];
- u8 nguid[16];
- uuid_t uuid;
- u8 csi;
- };
- /*
- * 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 {
- struct list_head list;
- struct srcu_struct srcu;
- struct nvme_subsystem *subsys;
- unsigned ns_id;
- struct nvme_ns_ids ids;
- struct list_head entry;
- struct kref ref;
- bool shared;
- int instance;
- struct nvme_effects_log *effects;
- #ifdef CONFIG_NVME_MULTIPATH
- struct gendisk *disk;
- struct bio_list requeue_list;
- spinlock_t requeue_lock;
- struct work_struct requeue_work;
- struct mutex lock;
- unsigned long flags;
- #define NVME_NSHEAD_DISK_LIVE 0
- struct nvme_ns __rcu *current_path[];
- #endif
- };
- enum nvme_ns_features {
- NVME_NS_EXT_LBAS = 1 << 0, /* support extended LBA format */
- NVME_NS_METADATA_SUPPORTED = 1 << 1, /* support getting generated md */
- };
- struct nvme_ns {
- struct list_head list;
- struct nvme_ctrl *ctrl;
- struct request_queue *queue;
- struct gendisk *disk;
- #ifdef CONFIG_NVME_MULTIPATH
- enum nvme_ana_state ana_state;
- u32 ana_grpid;
- #endif
- struct list_head siblings;
- struct nvm_dev *ndev;
- struct kref kref;
- struct nvme_ns_head *head;
- int lba_shift;
- u16 ms;
- u16 sgs;
- u32 sws;
- u8 pi_type;
- #ifdef CONFIG_BLK_DEV_ZONED
- u64 zsze;
- #endif
- unsigned long features;
- unsigned long flags;
- #define NVME_NS_REMOVING 0
- #define NVME_NS_DEAD 1
- #define NVME_NS_ANA_PENDING 2
- struct nvme_fault_inject fault_inject;
- };
- /* NVMe ns supports metadata actions by the controller (generate/strip) */
- static inline bool nvme_ns_has_pi(struct nvme_ns *ns)
- {
- return ns->pi_type && ns->ms == sizeof(struct t10_pi_tuple);
- }
- struct nvme_ctrl_ops {
- const char *name;
- struct module *module;
- unsigned int flags;
- #define NVME_F_FABRICS (1 << 0)
- #define NVME_F_METADATA_SUPPORTED (1 << 1)
- #define NVME_F_PCI_P2PDMA (1 << 2)
- int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
- int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
- int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
- void (*free_ctrl)(struct nvme_ctrl *ctrl);
- void (*submit_async_event)(struct nvme_ctrl *ctrl);
- void (*delete_ctrl)(struct nvme_ctrl *ctrl);
- int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
- };
- /*
- * nvme command_id is constructed as such:
- * | xxxx | xxxxxxxxxxxx |
- * gen request tag
- */
- #define nvme_genctr_mask(gen) (gen & 0xf)
- #define nvme_cid_install_genctr(gen) (nvme_genctr_mask(gen) << 12)
- #define nvme_genctr_from_cid(cid) ((cid & 0xf000) >> 12)
- #define nvme_tag_from_cid(cid) (cid & 0xfff)
- static inline u16 nvme_cid(struct request *rq)
- {
- return nvme_cid_install_genctr(nvme_req(rq)->genctr) | rq->tag;
- }
- static inline struct request *nvme_find_rq(struct blk_mq_tags *tags,
- u16 command_id)
- {
- u8 genctr = nvme_genctr_from_cid(command_id);
- u16 tag = nvme_tag_from_cid(command_id);
- struct request *rq;
- rq = blk_mq_tag_to_rq(tags, tag);
- if (unlikely(!rq)) {
- pr_err("could not locate request for tag %#x\n",
- tag);
- return NULL;
- }
- if (unlikely(nvme_genctr_mask(nvme_req(rq)->genctr) != genctr)) {
- dev_err(nvme_req(rq)->ctrl->device,
- "request %#x genctr mismatch (got %#x expected %#x)\n",
- tag, genctr, nvme_genctr_mask(nvme_req(rq)->genctr));
- return NULL;
- }
- return rq;
- }
- static inline struct request *nvme_cid_to_rq(struct blk_mq_tags *tags,
- u16 command_id)
- {
- return blk_mq_tag_to_rq(tags, nvme_tag_from_cid(command_id));
- }
- #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
- static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
- {
- if (!ctrl->subsystem)
- return -ENOTTY;
- return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
- }
- /*
- * Convert a 512B sector number to a device logical block number.
- */
- static inline u64 nvme_sect_to_lba(struct nvme_ns *ns, sector_t sector)
- {
- return sector >> (ns->lba_shift - SECTOR_SHIFT);
- }
- /*
- * Convert a device logical block number to a 512B sector number.
- */
- static inline sector_t nvme_lba_to_sect(struct nvme_ns *ns, u64 lba)
- {
- return lba << (ns->lba_shift - SECTOR_SHIFT);
- }
- /*
- * Convert byte length to nvme's 0-based num dwords
- */
- static inline u32 nvme_bytes_to_numd(size_t len)
- {
- return (len >> 2) - 1;
- }
- static inline bool nvme_is_ana_error(u16 status)
- {
- switch (status & 0x7ff) {
- case NVME_SC_ANA_TRANSITION:
- case NVME_SC_ANA_INACCESSIBLE:
- case NVME_SC_ANA_PERSISTENT_LOSS:
- return true;
- default:
- return false;
- }
- }
- static inline bool nvme_is_path_error(u16 status)
- {
- /* check for a status code type of 'path related status' */
- return (status & 0x700) == 0x300;
- }
- /*
- * 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)
- {
- struct nvme_request *rq = nvme_req(req);
- rq->status = le16_to_cpu(status) >> 1;
- rq->result = result;
- /* inject error when permitted by fault injection framework */
- nvme_should_fail(req);
- if (unlikely(blk_should_fake_timeout(req->q)))
- return true;
- return blk_mq_complete_request_remote(req);
- }
- static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl)
- {
- get_device(ctrl->device);
- }
- static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
- {
- put_device(ctrl->device);
- }
- static inline bool nvme_is_aen_req(u16 qid, __u16 command_id)
- {
- return !qid &&
- nvme_tag_from_cid(command_id) >= NVME_AQ_BLK_MQ_DEPTH;
- }
- void nvme_complete_rq(struct request *req);
- bool nvme_cancel_request(struct request *req, void *data, bool reserved);
- 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);
- bool nvme_wait_reset(struct nvme_ctrl *ctrl);
- int nvme_disable_ctrl(struct nvme_ctrl *ctrl);
- int nvme_enable_ctrl(struct nvme_ctrl *ctrl);
- int nvme_shutdown_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);
- 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_identify(struct nvme_ctrl *ctrl);
- void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
- int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len,
- bool send);
- void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
- volatile union nvme_result *res);
- void nvme_stop_queues(struct nvme_ctrl *ctrl);
- void nvme_start_queues(struct nvme_ctrl *ctrl);
- void nvme_kill_queues(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);
- #define NVME_QID_ANY -1
- struct request *nvme_alloc_request(struct request_queue *q,
- struct nvme_command *cmd, blk_mq_req_flags_t flags, int qid);
- void nvme_cleanup_cmd(struct request *req);
- blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
- struct nvme_command *cmd);
- 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,
- unsigned timeout, int qid, int at_head,
- blk_mq_req_flags_t flags, bool poll);
- 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_try_sched_reset(struct nvme_ctrl *ctrl);
- int nvme_delete_ctrl(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);
- struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk,
- struct nvme_ns_head **head, int *srcu_idx);
- void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx);
- extern const struct attribute_group *nvme_ns_id_attr_groups[];
- extern const struct block_device_operations nvme_ns_head_ops;
- #ifdef CONFIG_NVME_MULTIPATH
- static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
- {
- return ctrl->ana_log_buf != NULL;
- }
- 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_set_disk_name(char *disk_name, struct nvme_ns *ns,
- struct nvme_ctrl *ctrl, int *flags);
- 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, struct nvme_id_ns *id);
- 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_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_clear_ctrl_paths(struct nvme_ctrl *ctrl);
- struct nvme_ns *nvme_find_path(struct nvme_ns_head *head);
- blk_qc_t nvme_ns_head_submit_bio(struct bio *bio);
- static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)
- {
- struct nvme_ns_head *head = ns->head;
- if (head->disk && list_empty(&head->list))
- kblockd_schedule_work(&head->requeue_work);
- }
- static inline void nvme_trace_bio_complete(struct request *req,
- blk_status_t status)
- {
- struct nvme_ns *ns = req->q->queuedata;
- if (req->cmd_flags & REQ_NVME_MPATH)
- trace_block_bio_complete(ns->head->disk->queue, req->bio);
- }
- extern struct device_attribute dev_attr_ana_grpid;
- extern struct device_attribute dev_attr_ana_state;
- extern struct device_attribute subsys_attr_iopolicy;
- #else
- static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
- {
- return false;
- }
- /*
- * Without the multipath code enabled, multiple controller per subsystems are
- * visible as devices and thus we cannot use the subsystem instance.
- */
- static inline void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
- struct nvme_ctrl *ctrl, int *flags)
- {
- sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->head->instance);
- }
- 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,
- struct nvme_id_ns *id)
- {
- }
- 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_clear_ctrl_paths(struct nvme_ctrl *ctrl)
- {
- }
- static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)
- {
- }
- static inline void nvme_trace_bio_complete(struct request *req,
- blk_status_t status)
- {
- }
- 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 & (1 << 3))
- dev_warn(ctrl->device,
- "Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n");
- return 0;
- }
- 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)
- {
- }
- #endif /* CONFIG_NVME_MULTIPATH */
- int nvme_revalidate_zones(struct nvme_ns *ns);
- #ifdef CONFIG_BLK_DEV_ZONED
- int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf);
- int nvme_report_zones(struct gendisk *disk, sector_t sector,
- unsigned int nr_zones, report_zones_cb cb, void *data);
- 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
- #define nvme_report_zones NULL
- 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;
- }
- static inline int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf)
- {
- dev_warn(ns->ctrl->device,
- "Please enable CONFIG_BLK_DEV_ZONED to support ZNS devices\n");
- return -EPROTONOSUPPORT;
- }
- #endif
- #ifdef CONFIG_NVM
- int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node);
- void nvme_nvm_unregister(struct nvme_ns *ns);
- extern const struct attribute_group nvme_nvm_attr_group;
- int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg);
- #else
- static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name,
- int node)
- {
- return 0;
- }
- static inline void nvme_nvm_unregister(struct nvme_ns *ns) {};
- static inline int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd,
- unsigned long arg)
- {
- return -ENOTTY;
- }
- #endif /* CONFIG_NVM */
- static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
- {
- return dev_to_disk(dev)->private_data;
- }
- #ifdef CONFIG_NVME_HWMON
- int nvme_hwmon_init(struct nvme_ctrl *ctrl);
- #else
- static inline int nvme_hwmon_init(struct nvme_ctrl *ctrl)
- {
- return 0;
- }
- #endif
- u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
- u8 opcode);
- void nvme_execute_passthru_rq(struct request *rq);
- struct nvme_ctrl *nvme_ctrl_from_file(struct file *file);
- struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid);
- void nvme_put_ns(struct nvme_ns *ns);
- #endif /* _NVME_H */
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