// SPDX-License-Identifier: GPL-2.0 /* * NVM Express device driver * Copyright (c) 2011-2014, Intel Corporation. */ #include <linux/blkdev.h> #include <linux/blk-mq.h> #include <linux/compat.h> #include <linux/delay.h> #include <linux/errno.h> #include <linux/hdreg.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/backing-dev.h> #include <linux/slab.h> #include <linux/types.h> #include <linux/pr.h> #include <linux/ptrace.h> #include <linux/nvme_ioctl.h> #include <linux/pm_qos.h> #include <asm/unaligned.h> #include "nvme.h" #include "fabrics.h" #define CREATE_TRACE_POINTS #include "trace.h" #define NVME_MINORS (1U << MINORBITS) unsigned int admin_timeout = 60; module_param(admin_timeout, uint, 0644); MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands"); EXPORT_SYMBOL_GPL(admin_timeout); unsigned int nvme_io_timeout = 30; module_param_named(io_timeout, nvme_io_timeout, uint, 0644); MODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O"); EXPORT_SYMBOL_GPL(nvme_io_timeout); static unsigned char shutdown_timeout = 5; module_param(shutdown_timeout, byte, 0644); MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown"); static u8 nvme_max_retries = 5; module_param_named(max_retries, nvme_max_retries, byte, 0644); MODULE_PARM_DESC(max_retries, "max number of retries a command may have"); static unsigned long default_ps_max_latency_us = 100000; module_param(default_ps_max_latency_us, ulong, 0644); MODULE_PARM_DESC(default_ps_max_latency_us, <------><------> "max power saving latency for new devices; use PM QOS to change per device"); static bool force_apst; module_param(force_apst, bool, 0644); MODULE_PARM_DESC(force_apst, "allow APST for newly enumerated devices even if quirked off"); static bool streams; module_param(streams, bool, 0644); MODULE_PARM_DESC(streams, "turn on support for Streams write directives"); /* * nvme_wq - hosts nvme related works that are not reset or delete * nvme_reset_wq - hosts nvme reset works * nvme_delete_wq - hosts nvme delete works * * nvme_wq will host works such as scan, aen handling, fw activation, * keep-alive, periodic reconnects etc. nvme_reset_wq * runs reset works which also flush works hosted on nvme_wq for * serialization purposes. nvme_delete_wq host controller deletion * works which flush reset works for serialization. */ struct workqueue_struct *nvme_wq; EXPORT_SYMBOL_GPL(nvme_wq); struct workqueue_struct *nvme_reset_wq; EXPORT_SYMBOL_GPL(nvme_reset_wq); struct workqueue_struct *nvme_delete_wq; EXPORT_SYMBOL_GPL(nvme_delete_wq); static LIST_HEAD(nvme_subsystems); static DEFINE_MUTEX(nvme_subsystems_lock); static DEFINE_IDA(nvme_instance_ida); static dev_t nvme_chr_devt; static struct class *nvme_class; static struct class *nvme_subsys_class; static void nvme_put_subsystem(struct nvme_subsystem *subsys); static void nvme_remove_invalid_namespaces(struct nvme_ctrl *ctrl, <------><------><------><------><------> unsigned nsid); static void nvme_update_bdev_size(struct gendisk *disk) { <------>struct block_device *bdev = bdget_disk(disk, 0); <------>if (bdev) { <------><------>bd_set_nr_sectors(bdev, get_capacity(disk)); <------><------>bdput(bdev); <------>} } /* * Prepare a queue for teardown. * * This must forcibly unquiesce queues to avoid blocking dispatch, and only set * the capacity to 0 after that to avoid blocking dispatchers that may be * holding bd_butex. This will end buffered writers dirtying pages that can't * be synced. */ static void nvme_set_queue_dying(struct nvme_ns *ns) { <------>if (test_and_set_bit(NVME_NS_DEAD, &ns->flags)) <------><------>return; <------>blk_set_queue_dying(ns->queue); <------>blk_mq_unquiesce_queue(ns->queue); <------>set_capacity(ns->disk, 0); <------>nvme_update_bdev_size(ns->disk); } static void nvme_queue_scan(struct nvme_ctrl *ctrl) { <------>/* <------> * Only new queue scan work when admin and IO queues are both alive <------> */ <------>if (ctrl->state == NVME_CTRL_LIVE && ctrl->tagset) <------><------>queue_work(nvme_wq, &ctrl->scan_work); } /* * Use this function to proceed with scheduling reset_work for a controller * that had previously been set to the resetting state. This is intended for * code paths that can't be interrupted by other reset attempts. A hot removal * may prevent this from succeeding. */ int nvme_try_sched_reset(struct nvme_ctrl *ctrl) { <------>if (ctrl->state != NVME_CTRL_RESETTING) <------><------>return -EBUSY; <------>if (!queue_work(nvme_reset_wq, &ctrl->reset_work)) <------><------>return -EBUSY; <------>return 0; } EXPORT_SYMBOL_GPL(nvme_try_sched_reset); int nvme_reset_ctrl(struct nvme_ctrl *ctrl) { <------>if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING)) <------><------>return -EBUSY; <------>if (!queue_work(nvme_reset_wq, &ctrl->reset_work)) <------><------>return -EBUSY; <------>return 0; } EXPORT_SYMBOL_GPL(nvme_reset_ctrl); int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl) { <------>int ret; <------>ret = nvme_reset_ctrl(ctrl); <------>if (!ret) { <------><------>flush_work(&ctrl->reset_work); <------><------>if (ctrl->state != NVME_CTRL_LIVE) <------><------><------>ret = -ENETRESET; <------>} <------>return ret; } EXPORT_SYMBOL_GPL(nvme_reset_ctrl_sync); static void nvme_do_delete_ctrl(struct nvme_ctrl *ctrl) { <------>dev_info(ctrl->device, <------><------> "Removing ctrl: NQN \"%s\"\n", ctrl->opts->subsysnqn); <------>flush_work(&ctrl->reset_work); <------>nvme_stop_ctrl(ctrl); <------>nvme_remove_namespaces(ctrl); <------>ctrl->ops->delete_ctrl(ctrl); <------>nvme_uninit_ctrl(ctrl); } static void nvme_delete_ctrl_work(struct work_struct *work) { <------>struct nvme_ctrl *ctrl = <------><------>container_of(work, struct nvme_ctrl, delete_work); <------>nvme_do_delete_ctrl(ctrl); } int nvme_delete_ctrl(struct nvme_ctrl *ctrl) { <------>if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_DELETING)) <------><------>return -EBUSY; <------>if (!queue_work(nvme_delete_wq, &ctrl->delete_work)) <------><------>return -EBUSY; <------>return 0; } EXPORT_SYMBOL_GPL(nvme_delete_ctrl); static void nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl) { <------>/* <------> * Keep a reference until nvme_do_delete_ctrl() complete, <------> * since ->delete_ctrl can free the controller. <------> */ <------>nvme_get_ctrl(ctrl); <------>if (nvme_change_ctrl_state(ctrl, NVME_CTRL_DELETING)) <------><------>nvme_do_delete_ctrl(ctrl); <------>nvme_put_ctrl(ctrl); } static blk_status_t nvme_error_status(u16 status) { <------>switch (status & 0x7ff) { <------>case NVME_SC_SUCCESS: <------><------>return BLK_STS_OK; <------>case NVME_SC_CAP_EXCEEDED: <------><------>return BLK_STS_NOSPC; <------>case NVME_SC_LBA_RANGE: <------>case NVME_SC_CMD_INTERRUPTED: <------>case NVME_SC_NS_NOT_READY: <------><------>return BLK_STS_TARGET; <------>case NVME_SC_BAD_ATTRIBUTES: <------>case NVME_SC_ONCS_NOT_SUPPORTED: <------>case NVME_SC_INVALID_OPCODE: <------>case NVME_SC_INVALID_FIELD: <------>case NVME_SC_INVALID_NS: <------><------>return BLK_STS_NOTSUPP; <------>case NVME_SC_WRITE_FAULT: <------>case NVME_SC_READ_ERROR: <------>case NVME_SC_UNWRITTEN_BLOCK: <------>case NVME_SC_ACCESS_DENIED: <------>case NVME_SC_READ_ONLY: <------>case NVME_SC_COMPARE_FAILED: <------><------>return BLK_STS_MEDIUM; <------>case NVME_SC_GUARD_CHECK: <------>case NVME_SC_APPTAG_CHECK: <------>case NVME_SC_REFTAG_CHECK: <------>case NVME_SC_INVALID_PI: <------><------>return BLK_STS_PROTECTION; <------>case NVME_SC_RESERVATION_CONFLICT: <------><------>return BLK_STS_NEXUS; <------>case NVME_SC_HOST_PATH_ERROR: <------><------>return BLK_STS_TRANSPORT; <------>case NVME_SC_ZONE_TOO_MANY_ACTIVE: <------><------>return BLK_STS_ZONE_ACTIVE_RESOURCE; <------>case NVME_SC_ZONE_TOO_MANY_OPEN: <------><------>return BLK_STS_ZONE_OPEN_RESOURCE; <------>default: <------><------>return BLK_STS_IOERR; <------>} } static void nvme_retry_req(struct request *req) { <------>struct nvme_ns *ns = req->q->queuedata; <------>unsigned long delay = 0; <------>u16 crd; <------>/* The mask and shift result must be <= 3 */ <------>crd = (nvme_req(req)->status & NVME_SC_CRD) >> 11; <------>if (ns && crd) <------><------>delay = ns->ctrl->crdt[crd - 1] * 100; <------>nvme_req(req)->retries++; <------>blk_mq_requeue_request(req, false); <------>blk_mq_delay_kick_requeue_list(req->q, delay); } enum nvme_disposition { <------>COMPLETE, <------>RETRY, <------>FAILOVER, }; static inline enum nvme_disposition nvme_decide_disposition(struct request *req) { <------>if (likely(nvme_req(req)->status == 0)) <------><------>return COMPLETE; <------>if (blk_noretry_request(req) || <------> (nvme_req(req)->status & NVME_SC_DNR) || <------> nvme_req(req)->retries >= nvme_max_retries) <------><------>return COMPLETE; <------>if (req->cmd_flags & REQ_NVME_MPATH) { <------><------>if (nvme_is_path_error(nvme_req(req)->status) || <------><------> blk_queue_dying(req->q)) <------><------><------>return FAILOVER; <------>} else { <------><------>if (blk_queue_dying(req->q)) <------><------><------>return COMPLETE; <------>} <------>return RETRY; } static inline void nvme_end_req(struct request *req) { <------>blk_status_t status = nvme_error_status(nvme_req(req)->status); <------>if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) && <------> req_op(req) == REQ_OP_ZONE_APPEND) <------><------>req->__sector = nvme_lba_to_sect(req->q->queuedata, <------><------><------>le64_to_cpu(nvme_req(req)->result.u64)); <------>nvme_trace_bio_complete(req, status); <------>blk_mq_end_request(req, status); } void nvme_complete_rq(struct request *req) { <------>trace_nvme_complete_rq(req); <------>nvme_cleanup_cmd(req); <------>if (nvme_req(req)->ctrl->kas) <------><------>nvme_req(req)->ctrl->comp_seen = true; <------>switch (nvme_decide_disposition(req)) { <------>case COMPLETE: <------><------>nvme_end_req(req); <------><------>return; <------>case RETRY: <------><------>nvme_retry_req(req); <------><------>return; <------>case FAILOVER: <------><------>nvme_failover_req(req); <------><------>return; <------>} } EXPORT_SYMBOL_GPL(nvme_complete_rq); bool nvme_cancel_request(struct request *req, void *data, bool reserved) { <------>dev_dbg_ratelimited(((struct nvme_ctrl *) data)->device, <------><------><------><------>"Cancelling I/O %d", req->tag); <------>/* don't abort one completed request */ <------>if (blk_mq_request_completed(req)) <------><------>return true; <------>nvme_req(req)->status = NVME_SC_HOST_ABORTED_CMD; <------>nvme_req(req)->flags |= NVME_REQ_CANCELLED; <------>blk_mq_complete_request(req); <------>return true; } EXPORT_SYMBOL_GPL(nvme_cancel_request); void nvme_cancel_tagset(struct nvme_ctrl *ctrl) { <------>if (ctrl->tagset) { <------><------>blk_mq_tagset_busy_iter(ctrl->tagset, <------><------><------><------>nvme_cancel_request, ctrl); <------><------>blk_mq_tagset_wait_completed_request(ctrl->tagset); <------>} } EXPORT_SYMBOL_GPL(nvme_cancel_tagset); void nvme_cancel_admin_tagset(struct nvme_ctrl *ctrl) { <------>if (ctrl->admin_tagset) { <------><------>blk_mq_tagset_busy_iter(ctrl->admin_tagset, <------><------><------><------>nvme_cancel_request, ctrl); <------><------>blk_mq_tagset_wait_completed_request(ctrl->admin_tagset); <------>} } EXPORT_SYMBOL_GPL(nvme_cancel_admin_tagset); bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, <------><------>enum nvme_ctrl_state new_state) { <------>enum nvme_ctrl_state old_state; <------>unsigned long flags; <------>bool changed = false; <------>spin_lock_irqsave(&ctrl->lock, flags); <------>old_state = ctrl->state; <------>switch (new_state) { <------>case NVME_CTRL_LIVE: <------><------>switch (old_state) { <------><------>case NVME_CTRL_NEW: <------><------>case NVME_CTRL_RESETTING: <------><------>case NVME_CTRL_CONNECTING: <------><------><------>changed = true; <------><------><------>fallthrough; <------><------>default: <------><------><------>break; <------><------>} <------><------>break; <------>case NVME_CTRL_RESETTING: <------><------>switch (old_state) { <------><------>case NVME_CTRL_NEW: <------><------>case NVME_CTRL_LIVE: <------><------><------>changed = true; <------><------><------>fallthrough; <------><------>default: <------><------><------>break; <------><------>} <------><------>break; <------>case NVME_CTRL_CONNECTING: <------><------>switch (old_state) { <------><------>case NVME_CTRL_NEW: <------><------>case NVME_CTRL_RESETTING: <------><------><------>changed = true; <------><------><------>fallthrough; <------><------>default: <------><------><------>break; <------><------>} <------><------>break; <------>case NVME_CTRL_DELETING: <------><------>switch (old_state) { <------><------>case NVME_CTRL_LIVE: <------><------>case NVME_CTRL_RESETTING: <------><------>case NVME_CTRL_CONNECTING: <------><------><------>changed = true; <------><------><------>fallthrough; <------><------>default: <------><------><------>break; <------><------>} <------><------>break; <------>case NVME_CTRL_DELETING_NOIO: <------><------>switch (old_state) { <------><------>case NVME_CTRL_DELETING: <------><------>case NVME_CTRL_DEAD: <------><------><------>changed = true; <------><------><------>fallthrough; <------><------>default: <------><------><------>break; <------><------>} <------><------>break; <------>case NVME_CTRL_DEAD: <------><------>switch (old_state) { <------><------>case NVME_CTRL_DELETING: <------><------><------>changed = true; <------><------><------>fallthrough; <------><------>default: <------><------><------>break; <------><------>} <------><------>break; <------>default: <------><------>break; <------>} <------>if (changed) { <------><------>ctrl->state = new_state; <------><------>wake_up_all(&ctrl->state_wq); <------>} <------>spin_unlock_irqrestore(&ctrl->lock, flags); <------>if (changed && ctrl->state == NVME_CTRL_LIVE) <------><------>nvme_kick_requeue_lists(ctrl); <------>return changed; } EXPORT_SYMBOL_GPL(nvme_change_ctrl_state); /* * Returns true for sink states that can't ever transition back to live. */ static bool nvme_state_terminal(struct nvme_ctrl *ctrl) { <------>switch (ctrl->state) { <------>case NVME_CTRL_NEW: <------>case NVME_CTRL_LIVE: <------>case NVME_CTRL_RESETTING: <------>case NVME_CTRL_CONNECTING: <------><------>return false; <------>case NVME_CTRL_DELETING: <------>case NVME_CTRL_DELETING_NOIO: <------>case NVME_CTRL_DEAD: <------><------>return true; <------>default: <------><------>WARN_ONCE(1, "Unhandled ctrl state:%d", ctrl->state); <------><------>return true; <------>} } /* * Waits for the controller state to be resetting, or returns false if it is * not possible to ever transition to that state. */ bool nvme_wait_reset(struct nvme_ctrl *ctrl) { <------>wait_event(ctrl->state_wq, <------><------> nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING) || <------><------> nvme_state_terminal(ctrl)); <------>return ctrl->state == NVME_CTRL_RESETTING; } EXPORT_SYMBOL_GPL(nvme_wait_reset); static void nvme_free_ns_head(struct kref *ref) { <------>struct nvme_ns_head *head = <------><------>container_of(ref, struct nvme_ns_head, ref); <------>nvme_mpath_remove_disk(head); <------>ida_simple_remove(&head->subsys->ns_ida, head->instance); <------>cleanup_srcu_struct(&head->srcu); <------>nvme_put_subsystem(head->subsys); <------>kfree(head); } static void nvme_put_ns_head(struct nvme_ns_head *head) { <------>kref_put(&head->ref, nvme_free_ns_head); } static void nvme_free_ns(struct kref *kref) { <------>struct nvme_ns *ns = container_of(kref, struct nvme_ns, kref); <------>if (ns->ndev) <------><------>nvme_nvm_unregister(ns); <------>put_disk(ns->disk); <------>nvme_put_ns_head(ns->head); <------>nvme_put_ctrl(ns->ctrl); <------>kfree(ns); } void nvme_put_ns(struct nvme_ns *ns) { <------>kref_put(&ns->kref, nvme_free_ns); } EXPORT_SYMBOL_NS_GPL(nvme_put_ns, NVME_TARGET_PASSTHRU); static inline void nvme_clear_nvme_request(struct request *req) { <------>if (!(req->rq_flags & RQF_DONTPREP)) { <------><------>nvme_req(req)->retries = 0; <------><------>nvme_req(req)->flags = 0; <------><------>req->rq_flags |= RQF_DONTPREP; <------>} } struct request *nvme_alloc_request(struct request_queue *q, <------><------>struct nvme_command *cmd, blk_mq_req_flags_t flags, int qid) { <------>unsigned op = nvme_is_write(cmd) ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN; <------>struct request *req; <------>if (qid == NVME_QID_ANY) { <------><------>req = blk_mq_alloc_request(q, op, flags); <------>} else { <------><------>req = blk_mq_alloc_request_hctx(q, op, flags, <------><------><------><------>qid ? qid - 1 : 0); <------>} <------>if (IS_ERR(req)) <------><------>return req; <------>req->cmd_flags |= REQ_FAILFAST_DRIVER; <------>nvme_clear_nvme_request(req); <------>nvme_req(req)->cmd = cmd; <------>return req; } EXPORT_SYMBOL_GPL(nvme_alloc_request); static int nvme_toggle_streams(struct nvme_ctrl *ctrl, bool enable) { <------>struct nvme_command c; <------>memset(&c, 0, sizeof(c)); <------>c.directive.opcode = nvme_admin_directive_send; <------>c.directive.nsid = cpu_to_le32(NVME_NSID_ALL); <------>c.directive.doper = NVME_DIR_SND_ID_OP_ENABLE; <------>c.directive.dtype = NVME_DIR_IDENTIFY; <------>c.directive.tdtype = NVME_DIR_STREAMS; <------>c.directive.endir = enable ? NVME_DIR_ENDIR : 0; <------>return nvme_submit_sync_cmd(ctrl->admin_q, &c, NULL, 0); } static int nvme_disable_streams(struct nvme_ctrl *ctrl) { <------>return nvme_toggle_streams(ctrl, false); } static int nvme_enable_streams(struct nvme_ctrl *ctrl) { <------>return nvme_toggle_streams(ctrl, true); } static int nvme_get_stream_params(struct nvme_ctrl *ctrl, <------><------><------><------> struct streams_directive_params *s, u32 nsid) { <------>struct nvme_command c; <------>memset(&c, 0, sizeof(c)); <------>memset(s, 0, sizeof(*s)); <------>c.directive.opcode = nvme_admin_directive_recv; <------>c.directive.nsid = cpu_to_le32(nsid); <------>c.directive.numd = cpu_to_le32(nvme_bytes_to_numd(sizeof(*s))); <------>c.directive.doper = NVME_DIR_RCV_ST_OP_PARAM; <------>c.directive.dtype = NVME_DIR_STREAMS; <------>return nvme_submit_sync_cmd(ctrl->admin_q, &c, s, sizeof(*s)); } static int nvme_configure_directives(struct nvme_ctrl *ctrl) { <------>struct streams_directive_params s; <------>int ret; <------>if (!(ctrl->oacs & NVME_CTRL_OACS_DIRECTIVES)) <------><------>return 0; <------>if (!streams) <------><------>return 0; <------>ret = nvme_enable_streams(ctrl); <------>if (ret) <------><------>return ret; <------>ret = nvme_get_stream_params(ctrl, &s, NVME_NSID_ALL); <------>if (ret) <------><------>goto out_disable_stream; <------>ctrl->nssa = le16_to_cpu(s.nssa); <------>if (ctrl->nssa < BLK_MAX_WRITE_HINTS - 1) { <------><------>dev_info(ctrl->device, "too few streams (%u) available\n", <------><------><------><------><------>ctrl->nssa); <------><------>goto out_disable_stream; <------>} <------>ctrl->nr_streams = min_t(u16, ctrl->nssa, BLK_MAX_WRITE_HINTS - 1); <------>dev_info(ctrl->device, "Using %u streams\n", ctrl->nr_streams); <------>return 0; out_disable_stream: <------>nvme_disable_streams(ctrl); <------>return ret; } /* * Check if 'req' has a write hint associated with it. If it does, assign * a valid namespace stream to the write. */ static void nvme_assign_write_stream(struct nvme_ctrl *ctrl, <------><------><------><------> struct request *req, u16 *control, <------><------><------><------> u32 *dsmgmt) { <------>enum rw_hint streamid = req->write_hint; <------>if (streamid == WRITE_LIFE_NOT_SET || streamid == WRITE_LIFE_NONE) <------><------>streamid = 0; <------>else { <------><------>streamid--; <------><------>if (WARN_ON_ONCE(streamid > ctrl->nr_streams)) <------><------><------>return; <------><------>*control |= NVME_RW_DTYPE_STREAMS; <------><------>*dsmgmt |= streamid << 16; <------>} <------>if (streamid < ARRAY_SIZE(req->q->write_hints)) <------><------>req->q->write_hints[streamid] += blk_rq_bytes(req) >> 9; } static void nvme_setup_passthrough(struct request *req, <------><------>struct nvme_command *cmd) { <------>memcpy(cmd, nvme_req(req)->cmd, sizeof(*cmd)); <------>/* passthru commands should let the driver set the SGL flags */ <------>cmd->common.flags &= ~NVME_CMD_SGL_ALL; } static inline void nvme_setup_flush(struct nvme_ns *ns, <------><------>struct nvme_command *cmnd) { <------>cmnd->common.opcode = nvme_cmd_flush; <------>cmnd->common.nsid = cpu_to_le32(ns->head->ns_id); } static blk_status_t nvme_setup_discard(struct nvme_ns *ns, struct request *req, <------><------>struct nvme_command *cmnd) { <------>unsigned short segments = blk_rq_nr_discard_segments(req), n = 0; <------>struct nvme_dsm_range *range; <------>struct bio *bio; <------>/* <------> * Some devices do not consider the DSM 'Number of Ranges' field when <------> * determining how much data to DMA. Always allocate memory for maximum <------> * number of segments to prevent device reading beyond end of buffer. <------> */ <------>static const size_t alloc_size = sizeof(*range) * NVME_DSM_MAX_RANGES; <------>range = kzalloc(alloc_size, GFP_ATOMIC | __GFP_NOWARN); <------>if (!range) { <------><------>/* <------><------> * If we fail allocation our range, fallback to the controller <------><------> * discard page. If that's also busy, it's safe to return <------><------> * busy, as we know we can make progress once that's freed. <------><------> */ <------><------>if (test_and_set_bit_lock(0, &ns->ctrl->discard_page_busy)) <------><------><------>return BLK_STS_RESOURCE; <------><------>range = page_address(ns->ctrl->discard_page); <------>} <------>__rq_for_each_bio(bio, req) { <------><------>u64 slba = nvme_sect_to_lba(ns, bio->bi_iter.bi_sector); <------><------>u32 nlb = bio->bi_iter.bi_size >> ns->lba_shift; <------><------>if (n < segments) { <------><------><------>range[n].cattr = cpu_to_le32(0); <------><------><------>range[n].nlb = cpu_to_le32(nlb); <------><------><------>range[n].slba = cpu_to_le64(slba); <------><------>} <------><------>n++; <------>} <------>if (WARN_ON_ONCE(n != segments)) { <------><------>if (virt_to_page(range) == ns->ctrl->discard_page) <------><------><------>clear_bit_unlock(0, &ns->ctrl->discard_page_busy); <------><------>else <------><------><------>kfree(range); <------><------>return BLK_STS_IOERR; <------>} <------>cmnd->dsm.opcode = nvme_cmd_dsm; <------>cmnd->dsm.nsid = cpu_to_le32(ns->head->ns_id); <------>cmnd->dsm.nr = cpu_to_le32(segments - 1); <------>cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); <------>req->special_vec.bv_page = virt_to_page(range); <------>req->special_vec.bv_offset = offset_in_page(range); <------>req->special_vec.bv_len = alloc_size; <------>req->rq_flags |= RQF_SPECIAL_PAYLOAD; <------>return BLK_STS_OK; } static inline blk_status_t nvme_setup_write_zeroes(struct nvme_ns *ns, <------><------>struct request *req, struct nvme_command *cmnd) { <------>if (ns->ctrl->quirks & NVME_QUIRK_DEALLOCATE_ZEROES) <------><------>return nvme_setup_discard(ns, req, cmnd); <------>cmnd->write_zeroes.opcode = nvme_cmd_write_zeroes; <------>cmnd->write_zeroes.nsid = cpu_to_le32(ns->head->ns_id); <------>cmnd->write_zeroes.slba = <------><------>cpu_to_le64(nvme_sect_to_lba(ns, blk_rq_pos(req))); <------>cmnd->write_zeroes.length = <------><------>cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); <------>if (nvme_ns_has_pi(ns)) <------><------>cmnd->write_zeroes.control = cpu_to_le16(NVME_RW_PRINFO_PRACT); <------>else <------><------>cmnd->write_zeroes.control = 0; <------>return BLK_STS_OK; } static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns, <------><------>struct request *req, struct nvme_command *cmnd, <------><------>enum nvme_opcode op) { <------>struct nvme_ctrl *ctrl = ns->ctrl; <------>u16 control = 0; <------>u32 dsmgmt = 0; <------>if (req->cmd_flags & REQ_FUA) <------><------>control |= NVME_RW_FUA; <------>if (req->cmd_flags & (REQ_FAILFAST_DEV | REQ_RAHEAD)) <------><------>control |= NVME_RW_LR; <------>if (req->cmd_flags & REQ_RAHEAD) <------><------>dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; <------>cmnd->rw.opcode = op; <------>cmnd->rw.nsid = cpu_to_le32(ns->head->ns_id); <------>cmnd->rw.slba = cpu_to_le64(nvme_sect_to_lba(ns, blk_rq_pos(req))); <------>cmnd->rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); <------>if (req_op(req) == REQ_OP_WRITE && ctrl->nr_streams) <------><------>nvme_assign_write_stream(ctrl, req, &control, &dsmgmt); <------>if (ns->ms) { <------><------>/* <------><------> * If formated with metadata, the block layer always provides a <------><------> * metadata buffer if CONFIG_BLK_DEV_INTEGRITY is enabled. Else <------><------> * we enable the PRACT bit for protection information or set the <------><------> * namespace capacity to zero to prevent any I/O. <------><------> */ <------><------>if (!blk_integrity_rq(req)) { <------><------><------>if (WARN_ON_ONCE(!nvme_ns_has_pi(ns))) <------><------><------><------>return BLK_STS_NOTSUPP; <------><------><------>control |= NVME_RW_PRINFO_PRACT; <------><------>} <------><------>switch (ns->pi_type) { <------><------>case NVME_NS_DPS_PI_TYPE3: <------><------><------>control |= NVME_RW_PRINFO_PRCHK_GUARD; <------><------><------>break; <------><------>case NVME_NS_DPS_PI_TYPE1: <------><------>case NVME_NS_DPS_PI_TYPE2: <------><------><------>control |= NVME_RW_PRINFO_PRCHK_GUARD | <------><------><------><------><------>NVME_RW_PRINFO_PRCHK_REF; <------><------><------>if (op == nvme_cmd_zone_append) <------><------><------><------>control |= NVME_RW_APPEND_PIREMAP; <------><------><------>cmnd->rw.reftag = cpu_to_le32(t10_pi_ref_tag(req)); <------><------><------>break; <------><------>} <------>} <------>cmnd->rw.control = cpu_to_le16(control); <------>cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); <------>return 0; } void nvme_cleanup_cmd(struct request *req) { <------>if (req->rq_flags & RQF_SPECIAL_PAYLOAD) { <------><------>struct nvme_ns *ns = req->rq_disk->private_data; <------><------>struct page *page = req->special_vec.bv_page; <------><------>if (page == ns->ctrl->discard_page) <------><------><------>clear_bit_unlock(0, &ns->ctrl->discard_page_busy); <------><------>else <------><------><------>kfree(page_address(page) + req->special_vec.bv_offset); <------>} } EXPORT_SYMBOL_GPL(nvme_cleanup_cmd); blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req, <------><------>struct nvme_command *cmd) { <------>struct nvme_ctrl *ctrl = nvme_req(req)->ctrl; <------>blk_status_t ret = BLK_STS_OK; <------>nvme_clear_nvme_request(req); <------>memset(cmd, 0, sizeof(*cmd)); <------>switch (req_op(req)) { <------>case REQ_OP_DRV_IN: <------>case REQ_OP_DRV_OUT: <------><------>nvme_setup_passthrough(req, cmd); <------><------>break; <------>case REQ_OP_FLUSH: <------><------>nvme_setup_flush(ns, cmd); <------><------>break; <------>case REQ_OP_ZONE_RESET_ALL: <------>case REQ_OP_ZONE_RESET: <------><------>ret = nvme_setup_zone_mgmt_send(ns, req, cmd, NVME_ZONE_RESET); <------><------>break; <------>case REQ_OP_ZONE_OPEN: <------><------>ret = nvme_setup_zone_mgmt_send(ns, req, cmd, NVME_ZONE_OPEN); <------><------>break; <------>case REQ_OP_ZONE_CLOSE: <------><------>ret = nvme_setup_zone_mgmt_send(ns, req, cmd, NVME_ZONE_CLOSE); <------><------>break; <------>case REQ_OP_ZONE_FINISH: <------><------>ret = nvme_setup_zone_mgmt_send(ns, req, cmd, NVME_ZONE_FINISH); <------><------>break; <------>case REQ_OP_WRITE_ZEROES: <------><------>ret = nvme_setup_write_zeroes(ns, req, cmd); <------><------>break; <------>case REQ_OP_DISCARD: <------><------>ret = nvme_setup_discard(ns, req, cmd); <------><------>break; <------>case REQ_OP_READ: <------><------>ret = nvme_setup_rw(ns, req, cmd, nvme_cmd_read); <------><------>break; <------>case REQ_OP_WRITE: <------><------>ret = nvme_setup_rw(ns, req, cmd, nvme_cmd_write); <------><------>break; <------>case REQ_OP_ZONE_APPEND: <------><------>ret = nvme_setup_rw(ns, req, cmd, nvme_cmd_zone_append); <------><------>break; <------>default: <------><------>WARN_ON_ONCE(1); <------><------>return BLK_STS_IOERR; <------>} <------>if (!(ctrl->quirks & NVME_QUIRK_SKIP_CID_GEN)) <------><------>nvme_req(req)->genctr++; <------>cmd->common.command_id = nvme_cid(req); <------>trace_nvme_setup_cmd(req, cmd); <------>return ret; } EXPORT_SYMBOL_GPL(nvme_setup_cmd); static void nvme_end_sync_rq(struct request *rq, blk_status_t error) { <------>struct completion *waiting = rq->end_io_data; <------>rq->end_io_data = NULL; <------>complete(waiting); } static void nvme_execute_rq_polled(struct request_queue *q, <------><------>struct gendisk *bd_disk, struct request *rq, int at_head) { <------>DECLARE_COMPLETION_ONSTACK(wait); <------>WARN_ON_ONCE(!test_bit(QUEUE_FLAG_POLL, &q->queue_flags)); <------>rq->cmd_flags |= REQ_HIPRI; <------>rq->end_io_data = &wait; <------>blk_execute_rq_nowait(q, bd_disk, rq, at_head, nvme_end_sync_rq); <------>while (!completion_done(&wait)) { <------><------>blk_poll(q, request_to_qc_t(rq->mq_hctx, rq), true); <------><------>cond_resched(); <------>} } /* * Returns 0 on success. If the result is negative, it's a Linux error code; * if the result is positive, it's an NVM Express status code */ 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) { <------>struct request *req; <------>int ret; <------>req = nvme_alloc_request(q, cmd, flags, qid); <------>if (IS_ERR(req)) <------><------>return PTR_ERR(req); <------>req->timeout = timeout ? timeout : ADMIN_TIMEOUT; <------>if (buffer && bufflen) { <------><------>ret = blk_rq_map_kern(q, req, buffer, bufflen, GFP_KERNEL); <------><------>if (ret) <------><------><------>goto out; <------>} <------>if (poll) <------><------>nvme_execute_rq_polled(req->q, NULL, req, at_head); <------>else <------><------>blk_execute_rq(req->q, NULL, req, at_head); <------>if (result) <------><------>*result = nvme_req(req)->result; <------>if (nvme_req(req)->flags & NVME_REQ_CANCELLED) <------><------>ret = -EINTR; <------>else <------><------>ret = nvme_req(req)->status; out: <------>blk_mq_free_request(req); <------>return ret; } EXPORT_SYMBOL_GPL(__nvme_submit_sync_cmd); int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, <------><------>void *buffer, unsigned bufflen) { <------>return __nvme_submit_sync_cmd(q, cmd, NULL, buffer, bufflen, 0, <------><------><------>NVME_QID_ANY, 0, 0, false); } EXPORT_SYMBOL_GPL(nvme_submit_sync_cmd); static void *nvme_add_user_metadata(struct bio *bio, void __user *ubuf, <------><------>unsigned len, u32 seed, bool write) { <------>struct bio_integrity_payload *bip; <------>int ret = -ENOMEM; <------>void *buf; <------>buf = kmalloc(len, GFP_KERNEL); <------>if (!buf) <------><------>goto out; <------>ret = -EFAULT; <------>if (write && copy_from_user(buf, ubuf, len)) <------><------>goto out_free_meta; <------>bip = bio_integrity_alloc(bio, GFP_KERNEL, 1); <------>if (IS_ERR(bip)) { <------><------>ret = PTR_ERR(bip); <------><------>goto out_free_meta; <------>} <------>bip->bip_iter.bi_size = len; <------>bip->bip_iter.bi_sector = seed; <------>ret = bio_integrity_add_page(bio, virt_to_page(buf), len, <------><------><------>offset_in_page(buf)); <------>if (ret == len) <------><------>return buf; <------>ret = -ENOMEM; out_free_meta: <------>kfree(buf); out: <------>return ERR_PTR(ret); } static u32 nvme_known_admin_effects(u8 opcode) { <------>switch (opcode) { <------>case nvme_admin_format_nvm: <------><------>return NVME_CMD_EFFECTS_LBCC | NVME_CMD_EFFECTS_NCC | <------><------><------>NVME_CMD_EFFECTS_CSE_MASK; <------>case nvme_admin_sanitize_nvm: <------><------>return NVME_CMD_EFFECTS_LBCC | NVME_CMD_EFFECTS_CSE_MASK; <------>default: <------><------>break; <------>} <------>return 0; } u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u8 opcode) { <------>u32 effects = 0; <------>if (ns) { <------><------>if (ns->head->effects) <------><------><------>effects = le32_to_cpu(ns->head->effects->iocs[opcode]); <------><------>if (effects & ~(NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC)) <------><------><------>dev_warn(ctrl->device, <------><------><------><------> "IO command:%02x has unhandled effects:%08x\n", <------><------><------><------> opcode, effects); <------><------>return 0; <------>} <------>if (ctrl->effects) <------><------>effects = le32_to_cpu(ctrl->effects->acs[opcode]); <------>effects |= nvme_known_admin_effects(opcode); <------>return effects; } EXPORT_SYMBOL_NS_GPL(nvme_command_effects, NVME_TARGET_PASSTHRU); static u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns, <------><------><------> u8 opcode) { <------>u32 effects = nvme_command_effects(ctrl, ns, opcode); <------>/* <------> * For simplicity, IO to all namespaces is quiesced even if the command <------> * effects say only one namespace is affected. <------> */ <------>if (effects & NVME_CMD_EFFECTS_CSE_MASK) { <------><------>mutex_lock(&ctrl->scan_lock); <------><------>mutex_lock(&ctrl->subsys->lock); <------><------>nvme_mpath_start_freeze(ctrl->subsys); <------><------>nvme_mpath_wait_freeze(ctrl->subsys); <------><------>nvme_start_freeze(ctrl); <------><------>nvme_wait_freeze(ctrl); <------>} <------>return effects; } static void nvme_passthru_end(struct nvme_ctrl *ctrl, u32 effects) { <------>if (effects & NVME_CMD_EFFECTS_CSE_MASK) { <------><------>nvme_unfreeze(ctrl); <------><------>nvme_mpath_unfreeze(ctrl->subsys); <------><------>mutex_unlock(&ctrl->subsys->lock); <------><------>nvme_remove_invalid_namespaces(ctrl, NVME_NSID_ALL); <------><------>mutex_unlock(&ctrl->scan_lock); <------>} <------>if (effects & NVME_CMD_EFFECTS_CCC) <------><------>nvme_init_identify(ctrl); <------>if (effects & (NVME_CMD_EFFECTS_NIC | NVME_CMD_EFFECTS_NCC)) { <------><------>nvme_queue_scan(ctrl); <------><------>flush_work(&ctrl->scan_work); <------>} } void nvme_execute_passthru_rq(struct request *rq) { <------>struct nvme_command *cmd = nvme_req(rq)->cmd; <------>struct nvme_ctrl *ctrl = nvme_req(rq)->ctrl; <------>struct nvme_ns *ns = rq->q->queuedata; <------>struct gendisk *disk = ns ? ns->disk : NULL; <------>u32 effects; <------>effects = nvme_passthru_start(ctrl, ns, cmd->common.opcode); <------>blk_execute_rq(rq->q, disk, rq, 0); <------>nvme_passthru_end(ctrl, effects); } EXPORT_SYMBOL_NS_GPL(nvme_execute_passthru_rq, NVME_TARGET_PASSTHRU); static int nvme_submit_user_cmd(struct request_queue *q, <------><------>struct nvme_command *cmd, void __user *ubuffer, <------><------>unsigned bufflen, void __user *meta_buffer, unsigned meta_len, <------><------>u32 meta_seed, u64 *result, unsigned timeout) { <------>bool write = nvme_is_write(cmd); <------>struct nvme_ns *ns = q->queuedata; <------>struct gendisk *disk = ns ? ns->disk : NULL; <------>struct request *req; <------>struct bio *bio = NULL; <------>void *meta = NULL; <------>int ret; <------>req = nvme_alloc_request(q, cmd, 0, NVME_QID_ANY); <------>if (IS_ERR(req)) <------><------>return PTR_ERR(req); <------>req->timeout = timeout ? timeout : ADMIN_TIMEOUT; <------>nvme_req(req)->flags |= NVME_REQ_USERCMD; <------>if (ubuffer && bufflen) { <------><------>ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen, <------><------><------><------>GFP_KERNEL); <------><------>if (ret) <------><------><------>goto out; <------><------>bio = req->bio; <------><------>bio->bi_disk = disk; <------><------>if (disk && meta_buffer && meta_len) { <------><------><------>meta = nvme_add_user_metadata(bio, meta_buffer, meta_len, <------><------><------><------><------>meta_seed, write); <------><------><------>if (IS_ERR(meta)) { <------><------><------><------>ret = PTR_ERR(meta); <------><------><------><------>goto out_unmap; <------><------><------>} <------><------><------>req->cmd_flags |= REQ_INTEGRITY; <------><------>} <------>} <------>nvme_execute_passthru_rq(req); <------>if (nvme_req(req)->flags & NVME_REQ_CANCELLED) <------><------>ret = -EINTR; <------>else <------><------>ret = nvme_req(req)->status; <------>if (result) <------><------>*result = le64_to_cpu(nvme_req(req)->result.u64); <------>if (meta && !ret && !write) { <------><------>if (copy_to_user(meta_buffer, meta, meta_len)) <------><------><------>ret = -EFAULT; <------>} <------>kfree(meta); out_unmap: <------>if (bio) <------><------>blk_rq_unmap_user(bio); out: <------>blk_mq_free_request(req); <------>return ret; } static void nvme_keep_alive_end_io(struct request *rq, blk_status_t status) { <------>struct nvme_ctrl *ctrl = rq->end_io_data; <------>unsigned long flags; <------>bool startka = false; <------>blk_mq_free_request(rq); <------>if (status) { <------><------>dev_err(ctrl->device, <------><------><------>"failed nvme_keep_alive_end_io error=%d\n", <------><------><------><------>status); <------><------>return; <------>} <------>ctrl->comp_seen = false; <------>spin_lock_irqsave(&ctrl->lock, flags); <------>if (ctrl->state == NVME_CTRL_LIVE || <------> ctrl->state == NVME_CTRL_CONNECTING) <------><------>startka = true; <------>spin_unlock_irqrestore(&ctrl->lock, flags); <------>if (startka) <------><------>queue_delayed_work(nvme_wq, &ctrl->ka_work, ctrl->kato * HZ); } static int nvme_keep_alive(struct nvme_ctrl *ctrl) { <------>struct request *rq; <------>rq = nvme_alloc_request(ctrl->admin_q, &ctrl->ka_cmd, BLK_MQ_REQ_RESERVED, <------><------><------>NVME_QID_ANY); <------>if (IS_ERR(rq)) <------><------>return PTR_ERR(rq); <------>rq->timeout = ctrl->kato * HZ; <------>rq->end_io_data = ctrl; <------>blk_execute_rq_nowait(rq->q, NULL, rq, 0, nvme_keep_alive_end_io); <------>return 0; } static void nvme_keep_alive_work(struct work_struct *work) { <------>struct nvme_ctrl *ctrl = container_of(to_delayed_work(work), <------><------><------>struct nvme_ctrl, ka_work); <------>bool comp_seen = ctrl->comp_seen; <------>if ((ctrl->ctratt & NVME_CTRL_ATTR_TBKAS) && comp_seen) { <------><------>dev_dbg(ctrl->device, <------><------><------>"reschedule traffic based keep-alive timer\n"); <------><------>ctrl->comp_seen = false; <------><------>queue_delayed_work(nvme_wq, &ctrl->ka_work, ctrl->kato * HZ); <------><------>return; <------>} <------>if (nvme_keep_alive(ctrl)) { <------><------>/* allocation failure, reset the controller */ <------><------>dev_err(ctrl->device, "keep-alive failed\n"); <------><------>nvme_reset_ctrl(ctrl); <------><------>return; <------>} } static void nvme_start_keep_alive(struct nvme_ctrl *ctrl) { <------>if (unlikely(ctrl->kato == 0)) <------><------>return; <------>queue_delayed_work(nvme_wq, &ctrl->ka_work, ctrl->kato * HZ); } void nvme_stop_keep_alive(struct nvme_ctrl *ctrl) { <------>if (unlikely(ctrl->kato == 0)) <------><------>return; <------>cancel_delayed_work_sync(&ctrl->ka_work); } EXPORT_SYMBOL_GPL(nvme_stop_keep_alive); /* * In NVMe 1.0 the CNS field was just a binary controller or namespace * flag, thus sending any new CNS opcodes has a big chance of not working. * Qemu unfortunately had that bug after reporting a 1.1 version compliance * (but not for any later version). */ static bool nvme_ctrl_limited_cns(struct nvme_ctrl *ctrl) { <------>if (ctrl->quirks & NVME_QUIRK_IDENTIFY_CNS) <------><------>return ctrl->vs < NVME_VS(1, 2, 0); <------>return ctrl->vs < NVME_VS(1, 1, 0); } static int nvme_identify_ctrl(struct nvme_ctrl *dev, struct nvme_id_ctrl **id) { <------>struct nvme_command c = { }; <------>int error; <------>/* gcc-4.4.4 (at least) has issues with initializers and anon unions */ <------>c.identify.opcode = nvme_admin_identify; <------>c.identify.cns = NVME_ID_CNS_CTRL; <------>*id = kmalloc(sizeof(struct nvme_id_ctrl), GFP_KERNEL); <------>if (!*id) <------><------>return -ENOMEM; <------>error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, <------><------><------>sizeof(struct nvme_id_ctrl)); <------>if (error) <------><------>kfree(*id); <------>return error; } static bool nvme_multi_css(struct nvme_ctrl *ctrl) { <------>return (ctrl->ctrl_config & NVME_CC_CSS_MASK) == NVME_CC_CSS_CSI; } static int nvme_process_ns_desc(struct nvme_ctrl *ctrl, struct nvme_ns_ids *ids, <------><------>struct nvme_ns_id_desc *cur, bool *csi_seen) { <------>const char *warn_str = "ctrl returned bogus length:"; <------>void *data = cur; <------>switch (cur->nidt) { <------>case NVME_NIDT_EUI64: <------><------>if (cur->nidl != NVME_NIDT_EUI64_LEN) { <------><------><------>dev_warn(ctrl->device, "%s %d for NVME_NIDT_EUI64\n", <------><------><------><------> warn_str, cur->nidl); <------><------><------>return -1; <------><------>} <------><------>memcpy(ids->eui64, data + sizeof(*cur), NVME_NIDT_EUI64_LEN); <------><------>return NVME_NIDT_EUI64_LEN; <------>case NVME_NIDT_NGUID: <------><------>if (cur->nidl != NVME_NIDT_NGUID_LEN) { <------><------><------>dev_warn(ctrl->device, "%s %d for NVME_NIDT_NGUID\n", <------><------><------><------> warn_str, cur->nidl); <------><------><------>return -1; <------><------>} <------><------>memcpy(ids->nguid, data + sizeof(*cur), NVME_NIDT_NGUID_LEN); <------><------>return NVME_NIDT_NGUID_LEN; <------>case NVME_NIDT_UUID: <------><------>if (cur->nidl != NVME_NIDT_UUID_LEN) { <------><------><------>dev_warn(ctrl->device, "%s %d for NVME_NIDT_UUID\n", <------><------><------><------> warn_str, cur->nidl); <------><------><------>return -1; <------><------>} <------><------>uuid_copy(&ids->uuid, data + sizeof(*cur)); <------><------>return NVME_NIDT_UUID_LEN; <------>case NVME_NIDT_CSI: <------><------>if (cur->nidl != NVME_NIDT_CSI_LEN) { <------><------><------>dev_warn(ctrl->device, "%s %d for NVME_NIDT_CSI\n", <------><------><------><------> warn_str, cur->nidl); <------><------><------>return -1; <------><------>} <------><------>memcpy(&ids->csi, data + sizeof(*cur), NVME_NIDT_CSI_LEN); <------><------>*csi_seen = true; <------><------>return NVME_NIDT_CSI_LEN; <------>default: <------><------>/* Skip unknown types */ <------><------>return cur->nidl; <------>} } static int nvme_identify_ns_descs(struct nvme_ctrl *ctrl, unsigned nsid, <------><------>struct nvme_ns_ids *ids) { <------>struct nvme_command c = { }; <------>bool csi_seen = false; <------>int status, pos, len; <------>void *data; <------>if (ctrl->vs < NVME_VS(1, 3, 0) && !nvme_multi_css(ctrl)) <------><------>return 0; <------>if (ctrl->quirks & NVME_QUIRK_NO_NS_DESC_LIST) <------><------>return 0; <------>c.identify.opcode = nvme_admin_identify; <------>c.identify.nsid = cpu_to_le32(nsid); <------>c.identify.cns = NVME_ID_CNS_NS_DESC_LIST; <------>data = kzalloc(NVME_IDENTIFY_DATA_SIZE, GFP_KERNEL); <------>if (!data) <------><------>return -ENOMEM; <------>status = nvme_submit_sync_cmd(ctrl->admin_q, &c, data, <------><------><------><------> NVME_IDENTIFY_DATA_SIZE); <------>if (status) { <------><------>dev_warn(ctrl->device, <------><------><------>"Identify Descriptors failed (%d)\n", status); <------><------>goto free_data; <------>} <------>for (pos = 0; pos < NVME_IDENTIFY_DATA_SIZE; pos += len) { <------><------>struct nvme_ns_id_desc *cur = data + pos; <------><------>if (cur->nidl == 0) <------><------><------>break; <------><------>len = nvme_process_ns_desc(ctrl, ids, cur, &csi_seen); <------><------>if (len < 0) <------><------><------>break; <------><------>len += sizeof(*cur); <------>} <------>if (nvme_multi_css(ctrl) && !csi_seen) { <------><------>dev_warn(ctrl->device, "Command set not reported for nsid:%d\n", <------><------><------> nsid); <------><------>status = -EINVAL; <------>} free_data: <------>kfree(data); <------>return status; } static int nvme_identify_ns(struct nvme_ctrl *ctrl, unsigned nsid, <------><------><------>struct nvme_ns_ids *ids, struct nvme_id_ns **id) { <------>struct nvme_command c = { }; <------>int error; <------>/* gcc-4.4.4 (at least) has issues with initializers and anon unions */ <------>c.identify.opcode = nvme_admin_identify; <------>c.identify.nsid = cpu_to_le32(nsid); <------>c.identify.cns = NVME_ID_CNS_NS; <------>*id = kmalloc(sizeof(**id), GFP_KERNEL); <------>if (!*id) <------><------>return -ENOMEM; <------>error = nvme_submit_sync_cmd(ctrl->admin_q, &c, *id, sizeof(**id)); <------>if (error) { <------><------>dev_warn(ctrl->device, "Identify namespace failed (%d)\n", error); <------><------>goto out_free_id; <------>} <------>error = NVME_SC_INVALID_NS | NVME_SC_DNR; <------>if ((*id)->ncap == 0) /* namespace not allocated or attached */ <------><------>goto out_free_id; <------>if (ctrl->vs >= NVME_VS(1, 1, 0) && <------> !memchr_inv(ids->eui64, 0, sizeof(ids->eui64))) <------><------>memcpy(ids->eui64, (*id)->eui64, sizeof(ids->eui64)); <------>if (ctrl->vs >= NVME_VS(1, 2, 0) && <------> !memchr_inv(ids->nguid, 0, sizeof(ids->nguid))) <------><------>memcpy(ids->nguid, (*id)->nguid, sizeof(ids->nguid)); <------>return 0; out_free_id: <------>kfree(*id); <------>return error; } static int nvme_features(struct nvme_ctrl *dev, u8 op, unsigned int fid, <------><------>unsigned int dword11, void *buffer, size_t buflen, u32 *result) { <------>union nvme_result res = { 0 }; <------>struct nvme_command c; <------>int ret; <------>memset(&c, 0, sizeof(c)); <------>c.features.opcode = op; <------>c.features.fid = cpu_to_le32(fid); <------>c.features.dword11 = cpu_to_le32(dword11); <------>ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &res, <------><------><------>buffer, buflen, 0, NVME_QID_ANY, 0, 0, false); <------>if (ret >= 0 && result) <------><------>*result = le32_to_cpu(res.u32); <------>return ret; } int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid, <------><------> unsigned int dword11, void *buffer, size_t buflen, <------><------> u32 *result) { <------>return nvme_features(dev, nvme_admin_set_features, fid, dword11, buffer, <------><------><------> buflen, result); } EXPORT_SYMBOL_GPL(nvme_set_features); int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid, <------><------> unsigned int dword11, void *buffer, size_t buflen, <------><------> u32 *result) { <------>return nvme_features(dev, nvme_admin_get_features, fid, dword11, buffer, <------><------><------> buflen, result); } EXPORT_SYMBOL_GPL(nvme_get_features); int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count) { <------>u32 q_count = (*count - 1) | ((*count - 1) << 16); <------>u32 result; <------>int status, nr_io_queues; <------>status = nvme_set_features(ctrl, NVME_FEAT_NUM_QUEUES, q_count, NULL, 0, <------><------><------>&result); <------>if (status < 0) <------><------>return status; <------>/* <------> * Degraded controllers might return an error when setting the queue <------> * count. We still want to be able to bring them online and offer <------> * access to the admin queue, as that might be only way to fix them up. <------> */ <------>if (status > 0) { <------><------>dev_err(ctrl->device, "Could not set queue count (%d)\n", status); <------><------>*count = 0; <------>} else { <------><------>nr_io_queues = min(result & 0xffff, result >> 16) + 1; <------><------>*count = min(*count, nr_io_queues); <------>} <------>return 0; } EXPORT_SYMBOL_GPL(nvme_set_queue_count); #define NVME_AEN_SUPPORTED \ <------>(NVME_AEN_CFG_NS_ATTR | NVME_AEN_CFG_FW_ACT | \ <------> NVME_AEN_CFG_ANA_CHANGE | NVME_AEN_CFG_DISC_CHANGE) static void nvme_enable_aen(struct nvme_ctrl *ctrl) { <------>u32 result, supported_aens = ctrl->oaes & NVME_AEN_SUPPORTED; <------>int status; <------>if (!supported_aens) <------><------>return; <------>status = nvme_set_features(ctrl, NVME_FEAT_ASYNC_EVENT, supported_aens, <------><------><------>NULL, 0, &result); <------>if (status) <------><------>dev_warn(ctrl->device, "Failed to configure AEN (cfg %x)\n", <------><------><------> supported_aens); <------>queue_work(nvme_wq, &ctrl->async_event_work); } /* * Convert integer values from ioctl structures to user pointers, silently * ignoring the upper bits in the compat case to match behaviour of 32-bit * kernels. */ static void __user *nvme_to_user_ptr(uintptr_t ptrval) { <------>if (in_compat_syscall()) <------><------>ptrval = (compat_uptr_t)ptrval; <------>return (void __user *)ptrval; } static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) { <------>struct nvme_user_io io; <------>struct nvme_command c; <------>unsigned length, meta_len; <------>void __user *metadata; <------>if (copy_from_user(&io, uio, sizeof(io))) <------><------>return -EFAULT; <------>if (io.flags) <------><------>return -EINVAL; <------>switch (io.opcode) { <------>case nvme_cmd_write: <------>case nvme_cmd_read: <------>case nvme_cmd_compare: <------><------>break; <------>default: <------><------>return -EINVAL; <------>} <------>length = (io.nblocks + 1) << ns->lba_shift; <------>if ((io.control & NVME_RW_PRINFO_PRACT) && <------> ns->ms == sizeof(struct t10_pi_tuple)) { <------><------>/* <------><------> * Protection information is stripped/inserted by the <------><------> * controller. <------><------> */ <------><------>if (nvme_to_user_ptr(io.metadata)) <------><------><------>return -EINVAL; <------><------>meta_len = 0; <------><------>metadata = NULL; <------>} else { <------><------>meta_len = (io.nblocks + 1) * ns->ms; <------><------>metadata = nvme_to_user_ptr(io.metadata); <------>} <------>if (ns->features & NVME_NS_EXT_LBAS) { <------><------>length += meta_len; <------><------>meta_len = 0; <------>} else if (meta_len) { <------><------>if ((io.metadata & 3) || !io.metadata) <------><------><------>return -EINVAL; <------>} <------>memset(&c, 0, sizeof(c)); <------>c.rw.opcode = io.opcode; <------>c.rw.flags = io.flags; <------>c.rw.nsid = cpu_to_le32(ns->head->ns_id); <------>c.rw.slba = cpu_to_le64(io.slba); <------>c.rw.length = cpu_to_le16(io.nblocks); <------>c.rw.control = cpu_to_le16(io.control); <------>c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); <------>c.rw.reftag = cpu_to_le32(io.reftag); <------>c.rw.apptag = cpu_to_le16(io.apptag); <------>c.rw.appmask = cpu_to_le16(io.appmask); <------>return nvme_submit_user_cmd(ns->queue, &c, <------><------><------>nvme_to_user_ptr(io.addr), length, <------><------><------>metadata, meta_len, lower_32_bits(io.slba), NULL, 0); } static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns, <------><------><------>struct nvme_passthru_cmd __user *ucmd) { <------>struct nvme_passthru_cmd cmd; <------>struct nvme_command c; <------>unsigned timeout = 0; <------>u64 result; <------>int status; <------>if (!capable(CAP_SYS_ADMIN)) <------><------>return -EACCES; <------>if (copy_from_user(&cmd, ucmd, sizeof(cmd))) <------><------>return -EFAULT; <------>if (cmd.flags) <------><------>return -EINVAL; <------>memset(&c, 0, sizeof(c)); <------>c.common.opcode = cmd.opcode; <------>c.common.flags = cmd.flags; <------>c.common.nsid = cpu_to_le32(cmd.nsid); <------>c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); <------>c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); <------>c.common.cdw10 = cpu_to_le32(cmd.cdw10); <------>c.common.cdw11 = cpu_to_le32(cmd.cdw11); <------>c.common.cdw12 = cpu_to_le32(cmd.cdw12); <------>c.common.cdw13 = cpu_to_le32(cmd.cdw13); <------>c.common.cdw14 = cpu_to_le32(cmd.cdw14); <------>c.common.cdw15 = cpu_to_le32(cmd.cdw15); <------>if (cmd.timeout_ms) <------><------>timeout = msecs_to_jiffies(cmd.timeout_ms); <------>status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c, <------><------><------>nvme_to_user_ptr(cmd.addr), cmd.data_len, <------><------><------>nvme_to_user_ptr(cmd.metadata), cmd.metadata_len, <------><------><------>0, &result, timeout); <------>if (status >= 0) { <------><------>if (put_user(result, &ucmd->result)) <------><------><------>return -EFAULT; <------>} <------>return status; } static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns, <------><------><------>struct nvme_passthru_cmd64 __user *ucmd) { <------>struct nvme_passthru_cmd64 cmd; <------>struct nvme_command c; <------>unsigned timeout = 0; <------>int status; <------>if (!capable(CAP_SYS_ADMIN)) <------><------>return -EACCES; <------>if (copy_from_user(&cmd, ucmd, sizeof(cmd))) <------><------>return -EFAULT; <------>if (cmd.flags) <------><------>return -EINVAL; <------>memset(&c, 0, sizeof(c)); <------>c.common.opcode = cmd.opcode; <------>c.common.flags = cmd.flags; <------>c.common.nsid = cpu_to_le32(cmd.nsid); <------>c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); <------>c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); <------>c.common.cdw10 = cpu_to_le32(cmd.cdw10); <------>c.common.cdw11 = cpu_to_le32(cmd.cdw11); <------>c.common.cdw12 = cpu_to_le32(cmd.cdw12); <------>c.common.cdw13 = cpu_to_le32(cmd.cdw13); <------>c.common.cdw14 = cpu_to_le32(cmd.cdw14); <------>c.common.cdw15 = cpu_to_le32(cmd.cdw15); <------>if (cmd.timeout_ms) <------><------>timeout = msecs_to_jiffies(cmd.timeout_ms); <------>status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c, <------><------><------>nvme_to_user_ptr(cmd.addr), cmd.data_len, <------><------><------>nvme_to_user_ptr(cmd.metadata), cmd.metadata_len, <------><------><------>0, &cmd.result, timeout); <------>if (status >= 0) { <------><------>if (put_user(cmd.result, &ucmd->result)) <------><------><------>return -EFAULT; <------>} <------>return status; } /* * Issue ioctl requests on the first available path. Note that unlike normal * block layer requests we will not retry failed request on another controller. */ struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk, <------><------>struct nvme_ns_head **head, int *srcu_idx) { #ifdef CONFIG_NVME_MULTIPATH <------>if (disk->fops == &nvme_ns_head_ops) { <------><------>struct nvme_ns *ns; <------><------>*head = disk->private_data; <------><------>*srcu_idx = srcu_read_lock(&(*head)->srcu); <------><------>ns = nvme_find_path(*head); <------><------>if (!ns) <------><------><------>srcu_read_unlock(&(*head)->srcu, *srcu_idx); <------><------>return ns; <------>} #endif <------>*head = NULL; <------>*srcu_idx = -1; <------>return disk->private_data; } void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx) { <------>if (head) <------><------>srcu_read_unlock(&head->srcu, idx); } static bool is_ctrl_ioctl(unsigned int cmd) { <------>if (cmd == NVME_IOCTL_ADMIN_CMD || cmd == NVME_IOCTL_ADMIN64_CMD) <------><------>return true; <------>if (is_sed_ioctl(cmd)) <------><------>return true; <------>return false; } static int nvme_handle_ctrl_ioctl(struct nvme_ns *ns, unsigned int cmd, <------><------><------><------> void __user *argp, <------><------><------><------> struct nvme_ns_head *head, <------><------><------><------> int srcu_idx) { <------>struct nvme_ctrl *ctrl = ns->ctrl; <------>int ret; <------>nvme_get_ctrl(ns->ctrl); <------>nvme_put_ns_from_disk(head, srcu_idx); <------>switch (cmd) { <------>case NVME_IOCTL_ADMIN_CMD: <------><------>ret = nvme_user_cmd(ctrl, NULL, argp); <------><------>break; <------>case NVME_IOCTL_ADMIN64_CMD: <------><------>ret = nvme_user_cmd64(ctrl, NULL, argp); <------><------>break; <------>default: <------><------>ret = sed_ioctl(ctrl->opal_dev, cmd, argp); <------><------>break; <------>} <------>nvme_put_ctrl(ctrl); <------>return ret; } static int nvme_ioctl(struct block_device *bdev, fmode_t mode, <------><------>unsigned int cmd, unsigned long arg) { <------>struct nvme_ns_head *head = NULL; <------>void __user *argp = (void __user *)arg; <------>struct nvme_ns *ns; <------>int srcu_idx, ret; <------>ns = nvme_get_ns_from_disk(bdev->bd_disk, &head, &srcu_idx); <------>if (unlikely(!ns)) <------><------>return -EWOULDBLOCK; <------>/* <------> * Handle ioctls that apply to the controller instead of the namespace <------> * seperately and drop the ns SRCU reference early. This avoids a <------> * deadlock when deleting namespaces using the passthrough interface. <------> */ <------>if (is_ctrl_ioctl(cmd)) <------><------>return nvme_handle_ctrl_ioctl(ns, cmd, argp, head, srcu_idx); <------>switch (cmd) { <------>case NVME_IOCTL_ID: <------><------>force_successful_syscall_return(); <------><------>ret = ns->head->ns_id; <------><------>break; <------>case NVME_IOCTL_IO_CMD: <------><------>ret = nvme_user_cmd(ns->ctrl, ns, argp); <------><------>break; <------>case NVME_IOCTL_SUBMIT_IO: <------><------>ret = nvme_submit_io(ns, argp); <------><------>break; <------>case NVME_IOCTL_IO64_CMD: <------><------>ret = nvme_user_cmd64(ns->ctrl, ns, argp); <------><------>break; <------>default: <------><------>if (ns->ndev) <------><------><------>ret = nvme_nvm_ioctl(ns, cmd, arg); <------><------>else <------><------><------>ret = -ENOTTY; <------>} <------>nvme_put_ns_from_disk(head, srcu_idx); <------>return ret; } #ifdef CONFIG_COMPAT struct nvme_user_io32 { <------>__u8 opcode; <------>__u8 flags; <------>__u16 control; <------>__u16 nblocks; <------>__u16 rsvd; <------>__u64 metadata; <------>__u64 addr; <------>__u64 slba; <------>__u32 dsmgmt; <------>__u32 reftag; <------>__u16 apptag; <------>__u16 appmask; } __attribute__((__packed__)); #define NVME_IOCTL_SUBMIT_IO32 _IOW('N', 0x42, struct nvme_user_io32) static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, <------><------>unsigned int cmd, unsigned long arg) { <------>/* <------> * Corresponds to the difference of NVME_IOCTL_SUBMIT_IO <------> * between 32 bit programs and 64 bit kernel. <------> * The cause is that the results of sizeof(struct nvme_user_io), <------> * which is used to define NVME_IOCTL_SUBMIT_IO, <------> * are not same between 32 bit compiler and 64 bit compiler. <------> * NVME_IOCTL_SUBMIT_IO32 is for 64 bit kernel handling <------> * NVME_IOCTL_SUBMIT_IO issued from 32 bit programs. <------> * Other IOCTL numbers are same between 32 bit and 64 bit. <------> * So there is nothing to do regarding to other IOCTL numbers. <------> */ <------>if (cmd == NVME_IOCTL_SUBMIT_IO32) <------><------>return nvme_ioctl(bdev, mode, NVME_IOCTL_SUBMIT_IO, arg); <------>return nvme_ioctl(bdev, mode, cmd, arg); } #else #define nvme_compat_ioctl NULL #endif /* CONFIG_COMPAT */ static int nvme_open(struct block_device *bdev, fmode_t mode) { <------>struct nvme_ns *ns = bdev->bd_disk->private_data; #ifdef CONFIG_NVME_MULTIPATH <------>/* should never be called due to GENHD_FL_HIDDEN */ <------>if (WARN_ON_ONCE(ns->head->disk)) <------><------>goto fail; #endif <------>if (!kref_get_unless_zero(&ns->kref)) <------><------>goto fail; <------>if (!try_module_get(ns->ctrl->ops->module)) <------><------>goto fail_put_ns; <------>return 0; fail_put_ns: <------>nvme_put_ns(ns); fail: <------>return -ENXIO; } static void nvme_release(struct gendisk *disk, fmode_t mode) { <------>struct nvme_ns *ns = disk->private_data; <------>module_put(ns->ctrl->ops->module); <------>nvme_put_ns(ns); } static int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo) { <------>/* some standard values */ <------>geo->heads = 1 << 6; <------>geo->sectors = 1 << 5; <------>geo->cylinders = get_capacity(bdev->bd_disk) >> 11; <------>return 0; } #ifdef CONFIG_BLK_DEV_INTEGRITY static void nvme_init_integrity(struct gendisk *disk, u16 ms, u8 pi_type, <------><------><------><------>u32 max_integrity_segments) { <------>struct blk_integrity integrity; <------>memset(&integrity, 0, sizeof(integrity)); <------>switch (pi_type) { <------>case NVME_NS_DPS_PI_TYPE3: <------><------>integrity.profile = &t10_pi_type3_crc; <------><------>integrity.tag_size = sizeof(u16) + sizeof(u32); <------><------>integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; <------><------>break; <------>case NVME_NS_DPS_PI_TYPE1: <------>case NVME_NS_DPS_PI_TYPE2: <------><------>integrity.profile = &t10_pi_type1_crc; <------><------>integrity.tag_size = sizeof(u16); <------><------>integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; <------><------>break; <------>default: <------><------>integrity.profile = NULL; <------><------>break; <------>} <------>integrity.tuple_size = ms; <------>blk_integrity_register(disk, &integrity); <------>blk_queue_max_integrity_segments(disk->queue, max_integrity_segments); } #else static void nvme_init_integrity(struct gendisk *disk, u16 ms, u8 pi_type, <------><------><------><------>u32 max_integrity_segments) { } #endif /* CONFIG_BLK_DEV_INTEGRITY */ static void nvme_config_discard(struct gendisk *disk, struct nvme_ns *ns) { <------>struct nvme_ctrl *ctrl = ns->ctrl; <------>struct request_queue *queue = disk->queue; <------>u32 size = queue_logical_block_size(queue); <------>if (!(ctrl->oncs & NVME_CTRL_ONCS_DSM)) { <------><------>blk_queue_flag_clear(QUEUE_FLAG_DISCARD, queue); <------><------>return; <------>} <------>if (ctrl->nr_streams && ns->sws && ns->sgs) <------><------>size *= ns->sws * ns->sgs; <------>BUILD_BUG_ON(PAGE_SIZE / sizeof(struct nvme_dsm_range) < <------><------><------>NVME_DSM_MAX_RANGES); <------>queue->limits.discard_alignment = 0; <------>queue->limits.discard_granularity = size; <------>/* If discard is already enabled, don't reset queue limits */ <------>if (blk_queue_flag_test_and_set(QUEUE_FLAG_DISCARD, queue)) <------><------>return; <------>blk_queue_max_discard_sectors(queue, UINT_MAX); <------>blk_queue_max_discard_segments(queue, NVME_DSM_MAX_RANGES); <------>if (ctrl->quirks & NVME_QUIRK_DEALLOCATE_ZEROES) <------><------>blk_queue_max_write_zeroes_sectors(queue, UINT_MAX); } /* * Even though NVMe spec explicitly states that MDTS is not applicable to the * write-zeroes, we are cautious and limit the size to the controllers * max_hw_sectors value, which is based on the MDTS field and possibly other * limiting factors. */ static void nvme_config_write_zeroes(struct request_queue *q, <------><------>struct nvme_ctrl *ctrl) { <------>if ((ctrl->oncs & NVME_CTRL_ONCS_WRITE_ZEROES) && <------> !(ctrl->quirks & NVME_QUIRK_DISABLE_WRITE_ZEROES)) <------><------>blk_queue_max_write_zeroes_sectors(q, ctrl->max_hw_sectors); } static bool nvme_ns_ids_valid(struct nvme_ns_ids *ids) { <------>return !uuid_is_null(&ids->uuid) || <------><------>memchr_inv(ids->nguid, 0, sizeof(ids->nguid)) || <------><------>memchr_inv(ids->eui64, 0, sizeof(ids->eui64)); } static bool nvme_ns_ids_equal(struct nvme_ns_ids *a, struct nvme_ns_ids *b) { <------>return uuid_equal(&a->uuid, &b->uuid) && <------><------>memcmp(&a->nguid, &b->nguid, sizeof(a->nguid)) == 0 && <------><------>memcmp(&a->eui64, &b->eui64, sizeof(a->eui64)) == 0 && <------><------>a->csi == b->csi; } static int nvme_setup_streams_ns(struct nvme_ctrl *ctrl, struct nvme_ns *ns, <------><------><------><------> u32 *phys_bs, u32 *io_opt) { <------>struct streams_directive_params s; <------>int ret; <------>if (!ctrl->nr_streams) <------><------>return 0; <------>ret = nvme_get_stream_params(ctrl, &s, ns->head->ns_id); <------>if (ret) <------><------>return ret; <------>ns->sws = le32_to_cpu(s.sws); <------>ns->sgs = le16_to_cpu(s.sgs); <------>if (ns->sws) { <------><------>*phys_bs = ns->sws * (1 << ns->lba_shift); <------><------>if (ns->sgs) <------><------><------>*io_opt = *phys_bs * ns->sgs; <------>} <------>return 0; } static int nvme_configure_metadata(struct nvme_ns *ns, struct nvme_id_ns *id) { <------>struct nvme_ctrl *ctrl = ns->ctrl; <------>/* <------> * The PI implementation requires the metadata size to be equal to the <------> * t10 pi tuple size. <------> */ <------>ns->ms = le16_to_cpu(id->lbaf[id->flbas & NVME_NS_FLBAS_LBA_MASK].ms); <------>if (ns->ms == sizeof(struct t10_pi_tuple)) <------><------>ns->pi_type = id->dps & NVME_NS_DPS_PI_MASK; <------>else <------><------>ns->pi_type = 0; <------>ns->features &= ~(NVME_NS_METADATA_SUPPORTED | NVME_NS_EXT_LBAS); <------>if (!ns->ms || !(ctrl->ops->flags & NVME_F_METADATA_SUPPORTED)) <------><------>return 0; <------>if (ctrl->ops->flags & NVME_F_FABRICS) { <------><------>/* <------><------> * The NVMe over Fabrics specification only supports metadata as <------><------> * part of the extended data LBA. We rely on HCA/HBA support to <------><------> * remap the separate metadata buffer from the block layer. <------><------> */ <------><------>if (WARN_ON_ONCE(!(id->flbas & NVME_NS_FLBAS_META_EXT))) <------><------><------>return -EINVAL; <------><------>if (ctrl->max_integrity_segments) <------><------><------>ns->features |= <------><------><------><------>(NVME_NS_METADATA_SUPPORTED | NVME_NS_EXT_LBAS); <------>} else { <------><------>/* <------><------> * For PCIe controllers, we can't easily remap the separate <------><------> * metadata buffer from the block layer and thus require a <------><------> * separate metadata buffer for block layer metadata/PI support. <------><------> * We allow extended LBAs for the passthrough interface, though. <------><------> */ <------><------>if (id->flbas & NVME_NS_FLBAS_META_EXT) <------><------><------>ns->features |= NVME_NS_EXT_LBAS; <------><------>else <------><------><------>ns->features |= NVME_NS_METADATA_SUPPORTED; <------>} <------>return 0; } static void nvme_set_queue_limits(struct nvme_ctrl *ctrl, <------><------>struct request_queue *q) { <------>bool vwc = ctrl->vwc & NVME_CTRL_VWC_PRESENT; <------>if (ctrl->max_hw_sectors) { <------><------>u32 max_segments = <------><------><------>(ctrl->max_hw_sectors / (NVME_CTRL_PAGE_SIZE >> 9)) + 1; <------><------>max_segments = min_not_zero(max_segments, ctrl->max_segments); <------><------>blk_queue_max_hw_sectors(q, ctrl->max_hw_sectors); <------><------>blk_queue_max_segments(q, min_t(u32, max_segments, USHRT_MAX)); <------>} <------>blk_queue_virt_boundary(q, NVME_CTRL_PAGE_SIZE - 1); <------>blk_queue_dma_alignment(q, 7); <------>blk_queue_write_cache(q, vwc, vwc); } static void nvme_update_disk_info(struct gendisk *disk, <------><------>struct nvme_ns *ns, struct nvme_id_ns *id) { <------>sector_t capacity = nvme_lba_to_sect(ns, le64_to_cpu(id->nsze)); <------>unsigned short bs = 1 << ns->lba_shift; <------>u32 atomic_bs, phys_bs, io_opt = 0; <------>/* <------> * The block layer can't support LBA sizes larger than the page size <------> * yet, so catch this early and don't allow block I/O. <------> */ <------>if (ns->lba_shift > PAGE_SHIFT) { <------><------>capacity = 0; <------><------>bs = (1 << 9); <------>} <------>blk_integrity_unregister(disk); <------>atomic_bs = phys_bs = bs; <------>nvme_setup_streams_ns(ns->ctrl, ns, &phys_bs, &io_opt); <------>if (id->nabo == 0) { <------><------>/* <------><------> * Bit 1 indicates whether NAWUPF is defined for this namespace <------><------> * and whether it should be used instead of AWUPF. If NAWUPF == <------><------> * 0 then AWUPF must be used instead. <------><------> */ <------><------>if (id->nsfeat & NVME_NS_FEAT_ATOMICS && id->nawupf) <------><------><------>atomic_bs = (1 + le16_to_cpu(id->nawupf)) * bs; <------><------>else <------><------><------>atomic_bs = (1 + ns->ctrl->subsys->awupf) * bs; <------>} <------>if (id->nsfeat & NVME_NS_FEAT_IO_OPT) { <------><------>/* NPWG = Namespace Preferred Write Granularity */ <------><------>phys_bs = bs * (1 + le16_to_cpu(id->npwg)); <------><------>/* NOWS = Namespace Optimal Write Size */ <------><------>io_opt = bs * (1 + le16_to_cpu(id->nows)); <------>} <------>blk_queue_logical_block_size(disk->queue, bs); <------>/* <------> * Linux filesystems assume writing a single physical block is <------> * an atomic operation. Hence limit the physical block size to the <------> * value of the Atomic Write Unit Power Fail parameter. <------> */ <------>blk_queue_physical_block_size(disk->queue, min(phys_bs, atomic_bs)); <------>blk_queue_io_min(disk->queue, phys_bs); <------>blk_queue_io_opt(disk->queue, io_opt); <------>/* <------> * Register a metadata profile for PI, or the plain non-integrity NVMe <------> * metadata masquerading as Type 0 if supported, otherwise reject block <------> * I/O to namespaces with metadata except when the namespace supports <------> * PI, as it can strip/insert in that case. <------> */ <------>if (ns->ms) { <------><------>if (IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY) && <------><------> (ns->features & NVME_NS_METADATA_SUPPORTED)) <------><------><------>nvme_init_integrity(disk, ns->ms, ns->pi_type, <------><------><------><------><------> ns->ctrl->max_integrity_segments); <------><------>else if (!nvme_ns_has_pi(ns)) <------><------><------>capacity = 0; <------>} <------>set_capacity_revalidate_and_notify(disk, capacity, false); <------>nvme_config_discard(disk, ns); <------>nvme_config_write_zeroes(disk->queue, ns->ctrl); <------>if (id->nsattr & NVME_NS_ATTR_RO) <------><------>set_disk_ro(disk, true); } static inline bool nvme_first_scan(struct gendisk *disk) { <------>/* nvme_alloc_ns() scans the disk prior to adding it */ <------>return !(disk->flags & GENHD_FL_UP); } static void nvme_set_chunk_sectors(struct nvme_ns *ns, struct nvme_id_ns *id) { <------>struct nvme_ctrl *ctrl = ns->ctrl; <------>u32 iob; <------>if ((ctrl->quirks & NVME_QUIRK_STRIPE_SIZE) && <------> is_power_of_2(ctrl->max_hw_sectors)) <------><------>iob = ctrl->max_hw_sectors; <------>else <------><------>iob = nvme_lba_to_sect(ns, le16_to_cpu(id->noiob)); <------>if (!iob) <------><------>return; <------>if (!is_power_of_2(iob)) { <------><------>if (nvme_first_scan(ns->disk)) <------><------><------>pr_warn("%s: ignoring unaligned IO boundary:%u\n", <------><------><------><------>ns->disk->disk_name, iob); <------><------>return; <------>} <------>if (blk_queue_is_zoned(ns->disk->queue)) { <------><------>if (nvme_first_scan(ns->disk)) <------><------><------>pr_warn("%s: ignoring zoned namespace IO boundary\n", <------><------><------><------>ns->disk->disk_name); <------><------>return; <------>} <------>blk_queue_chunk_sectors(ns->queue, iob); } static int nvme_update_ns_info(struct nvme_ns *ns, struct nvme_id_ns *id) { <------>unsigned lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK; <------>int ret; <------>blk_mq_freeze_queue(ns->disk->queue); <------>ns->lba_shift = id->lbaf[lbaf].ds; <------>nvme_set_queue_limits(ns->ctrl, ns->queue); <------>if (ns->head->ids.csi == NVME_CSI_ZNS) { <------><------>ret = nvme_update_zone_info(ns, lbaf); <------><------>if (ret) <------><------><------>goto out_unfreeze; <------>} <------>ret = nvme_configure_metadata(ns, id); <------>if (ret) <------><------>goto out_unfreeze; <------>nvme_set_chunk_sectors(ns, id); <------>nvme_update_disk_info(ns->disk, ns, id); <------>blk_mq_unfreeze_queue(ns->disk->queue); <------>if (blk_queue_is_zoned(ns->queue)) { <------><------>ret = nvme_revalidate_zones(ns); <------><------>if (ret && !nvme_first_scan(ns->disk)) <------><------><------>return ret; <------>} #ifdef CONFIG_NVME_MULTIPATH <------>if (ns->head->disk) { <------><------>blk_mq_freeze_queue(ns->head->disk->queue); <------><------>nvme_update_disk_info(ns->head->disk, ns, id); <------><------>blk_stack_limits(&ns->head->disk->queue->limits, <------><------><------><------> &ns->queue->limits, 0); <------><------>blk_queue_update_readahead(ns->head->disk->queue); <------><------>nvme_update_bdev_size(ns->head->disk); <------><------>blk_mq_unfreeze_queue(ns->head->disk->queue); <------>} #endif <------>return 0; out_unfreeze: <------>blk_mq_unfreeze_queue(ns->disk->queue); <------>return ret; } static char nvme_pr_type(enum pr_type type) { <------>switch (type) { <------>case PR_WRITE_EXCLUSIVE: <------><------>return 1; <------>case PR_EXCLUSIVE_ACCESS: <------><------>return 2; <------>case PR_WRITE_EXCLUSIVE_REG_ONLY: <------><------>return 3; <------>case PR_EXCLUSIVE_ACCESS_REG_ONLY: <------><------>return 4; <------>case PR_WRITE_EXCLUSIVE_ALL_REGS: <------><------>return 5; <------>case PR_EXCLUSIVE_ACCESS_ALL_REGS: <------><------>return 6; <------>default: <------><------>return 0; <------>} }; static int nvme_pr_command(struct block_device *bdev, u32 cdw10, <------><------><------><------>u64 key, u64 sa_key, u8 op) { <------>struct nvme_ns_head *head = NULL; <------>struct nvme_ns *ns; <------>struct nvme_command c; <------>int srcu_idx, ret; <------>u8 data[16] = { 0, }; <------>ns = nvme_get_ns_from_disk(bdev->bd_disk, &head, &srcu_idx); <------>if (unlikely(!ns)) <------><------>return -EWOULDBLOCK; <------>put_unaligned_le64(key, &data[0]); <------>put_unaligned_le64(sa_key, &data[8]); <------>memset(&c, 0, sizeof(c)); <------>c.common.opcode = op; <------>c.common.nsid = cpu_to_le32(ns->head->ns_id); <------>c.common.cdw10 = cpu_to_le32(cdw10); <------>ret = nvme_submit_sync_cmd(ns->queue, &c, data, 16); <------>nvme_put_ns_from_disk(head, srcu_idx); <------>return ret; } static int nvme_pr_register(struct block_device *bdev, u64 old, <------><------>u64 new, unsigned flags) { <------>u32 cdw10; <------>if (flags & ~PR_FL_IGNORE_KEY) <------><------>return -EOPNOTSUPP; <------>cdw10 = old ? 2 : 0; <------>cdw10 |= (flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0; <------>cdw10 |= (1 << 30) | (1 << 31); /* PTPL=1 */ <------>return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register); } static int nvme_pr_reserve(struct block_device *bdev, u64 key, <------><------>enum pr_type type, unsigned flags) { <------>u32 cdw10; <------>if (flags & ~PR_FL_IGNORE_KEY) <------><------>return -EOPNOTSUPP; <------>cdw10 = nvme_pr_type(type) << 8; <------>cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0); <------>return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire); } static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, <------><------>enum pr_type type, bool abort) { <------>u32 cdw10 = nvme_pr_type(type) << 8 | (abort ? 2 : 1); <------>return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire); } static int nvme_pr_clear(struct block_device *bdev, u64 key) { <------>u32 cdw10 = 1 | (key ? 1 << 3 : 0); <------>return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_register); } static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type) { <------>u32 cdw10 = nvme_pr_type(type) << 8 | (key ? 1 << 3 : 0); <------>return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); } static const struct pr_ops nvme_pr_ops = { <------>.pr_register = nvme_pr_register, <------>.pr_reserve = nvme_pr_reserve, <------>.pr_release = nvme_pr_release, <------>.pr_preempt = nvme_pr_preempt, <------>.pr_clear = nvme_pr_clear, }; #ifdef CONFIG_BLK_SED_OPAL int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len, <------><------>bool send) { <------>struct nvme_ctrl *ctrl = data; <------>struct nvme_command cmd; <------>memset(&cmd, 0, sizeof(cmd)); <------>if (send) <------><------>cmd.common.opcode = nvme_admin_security_send; <------>else <------><------>cmd.common.opcode = nvme_admin_security_recv; <------>cmd.common.nsid = 0; <------>cmd.common.cdw10 = cpu_to_le32(((u32)secp) << 24 | ((u32)spsp) << 8); <------>cmd.common.cdw11 = cpu_to_le32(len); <------>return __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, NULL, buffer, len, <------><------><------><------> ADMIN_TIMEOUT, NVME_QID_ANY, 1, 0, false); } EXPORT_SYMBOL_GPL(nvme_sec_submit); #endif /* CONFIG_BLK_SED_OPAL */ static const struct block_device_operations nvme_fops = { <------>.owner = THIS_MODULE, <------>.ioctl = nvme_ioctl, <------>.compat_ioctl = nvme_compat_ioctl, <------>.open = nvme_open, <------>.release = nvme_release, <------>.getgeo = nvme_getgeo, <------>.report_zones = nvme_report_zones, <------>.pr_ops = &nvme_pr_ops, }; #ifdef CONFIG_NVME_MULTIPATH static int nvme_ns_head_open(struct block_device *bdev, fmode_t mode) { <------>struct nvme_ns_head *head = bdev->bd_disk->private_data; <------>if (!kref_get_unless_zero(&head->ref)) <------><------>return -ENXIO; <------>return 0; } static void nvme_ns_head_release(struct gendisk *disk, fmode_t mode) { <------>nvme_put_ns_head(disk->private_data); } const struct block_device_operations nvme_ns_head_ops = { <------>.owner = THIS_MODULE, <------>.submit_bio = nvme_ns_head_submit_bio, <------>.open = nvme_ns_head_open, <------>.release = nvme_ns_head_release, <------>.ioctl = nvme_ioctl, <------>.compat_ioctl = nvme_compat_ioctl, <------>.getgeo = nvme_getgeo, <------>.report_zones = nvme_report_zones, <------>.pr_ops = &nvme_pr_ops, }; #endif /* CONFIG_NVME_MULTIPATH */ static int nvme_wait_ready(struct nvme_ctrl *ctrl, u64 cap, bool enabled) { <------>unsigned long timeout = <------><------>((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; <------>u32 csts, bit = enabled ? NVME_CSTS_RDY : 0; <------>int ret; <------>while ((ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) == 0) { <------><------>if (csts == ~0) <------><------><------>return -ENODEV; <------><------>if ((csts & NVME_CSTS_RDY) == bit) <------><------><------>break; <------><------>usleep_range(1000, 2000); <------><------>if (fatal_signal_pending(current)) <------><------><------>return -EINTR; <------><------>if (time_after(jiffies, timeout)) { <------><------><------>dev_err(ctrl->device, <------><------><------><------>"Device not ready; aborting %s, CSTS=0x%x\n", <------><------><------><------>enabled ? "initialisation" : "reset", csts); <------><------><------>return -ENODEV; <------><------>} <------>} <------>return ret; } /* * If the device has been passed off to us in an enabled state, just clear * the enabled bit. The spec says we should set the 'shutdown notification * bits', but doing so may cause the device to complete commands to the * admin queue ... and we don't know what memory that might be pointing at! */ int nvme_disable_ctrl(struct nvme_ctrl *ctrl) { <------>int ret; <------>ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; <------>ctrl->ctrl_config &= ~NVME_CC_ENABLE; <------>ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); <------>if (ret) <------><------>return ret; <------>if (ctrl->quirks & NVME_QUIRK_DELAY_BEFORE_CHK_RDY) <------><------>msleep(NVME_QUIRK_DELAY_AMOUNT); <------>return nvme_wait_ready(ctrl, ctrl->cap, false); } EXPORT_SYMBOL_GPL(nvme_disable_ctrl); int nvme_enable_ctrl(struct nvme_ctrl *ctrl) { <------>unsigned dev_page_min; <------>int ret; <------>ret = ctrl->ops->reg_read64(ctrl, NVME_REG_CAP, &ctrl->cap); <------>if (ret) { <------><------>dev_err(ctrl->device, "Reading CAP failed (%d)\n", ret); <------><------>return ret; <------>} <------>dev_page_min = NVME_CAP_MPSMIN(ctrl->cap) + 12; <------>if (NVME_CTRL_PAGE_SHIFT < dev_page_min) { <------><------>dev_err(ctrl->device, <------><------><------>"Minimum device page size %u too large for host (%u)\n", <------><------><------>1 << dev_page_min, 1 << NVME_CTRL_PAGE_SHIFT); <------><------>return -ENODEV; <------>} <------>if (NVME_CAP_CSS(ctrl->cap) & NVME_CAP_CSS_CSI) <------><------>ctrl->ctrl_config = NVME_CC_CSS_CSI; <------>else <------><------>ctrl->ctrl_config = NVME_CC_CSS_NVM; <------>ctrl->ctrl_config |= (NVME_CTRL_PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; <------>ctrl->ctrl_config |= NVME_CC_AMS_RR | NVME_CC_SHN_NONE; <------>ctrl->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; <------>ctrl->ctrl_config |= NVME_CC_ENABLE; <------>ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); <------>if (ret) <------><------>return ret; <------>return nvme_wait_ready(ctrl, ctrl->cap, true); } EXPORT_SYMBOL_GPL(nvme_enable_ctrl); int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl) { <------>unsigned long timeout = jiffies + (ctrl->shutdown_timeout * HZ); <------>u32 csts; <------>int ret; <------>ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; <------>ctrl->ctrl_config |= NVME_CC_SHN_NORMAL; <------>ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); <------>if (ret) <------><------>return ret; <------>while ((ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) == 0) { <------><------>if ((csts & NVME_CSTS_SHST_MASK) == NVME_CSTS_SHST_CMPLT) <------><------><------>break; <------><------>msleep(100); <------><------>if (fatal_signal_pending(current)) <------><------><------>return -EINTR; <------><------>if (time_after(jiffies, timeout)) { <------><------><------>dev_err(ctrl->device, <------><------><------><------>"Device shutdown incomplete; abort shutdown\n"); <------><------><------>return -ENODEV; <------><------>} <------>} <------>return ret; } EXPORT_SYMBOL_GPL(nvme_shutdown_ctrl); static int nvme_configure_timestamp(struct nvme_ctrl *ctrl) { <------>__le64 ts; <------>int ret; <------>if (!(ctrl->oncs & NVME_CTRL_ONCS_TIMESTAMP)) <------><------>return 0; <------>ts = cpu_to_le64(ktime_to_ms(ktime_get_real())); <------>ret = nvme_set_features(ctrl, NVME_FEAT_TIMESTAMP, 0, &ts, sizeof(ts), <------><------><------>NULL); <------>if (ret) <------><------>dev_warn_once(ctrl->device, <------><------><------>"could not set timestamp (%d)\n", ret); <------>return ret; } static int nvme_configure_acre(struct nvme_ctrl *ctrl) { <------>struct nvme_feat_host_behavior *host; <------>int ret; <------>/* Don't bother enabling the feature if retry delay is not reported */ <------>if (!ctrl->crdt[0]) <------><------>return 0; <------>host = kzalloc(sizeof(*host), GFP_KERNEL); <------>if (!host) <------><------>return 0; <------>host->acre = NVME_ENABLE_ACRE; <------>ret = nvme_set_features(ctrl, NVME_FEAT_HOST_BEHAVIOR, 0, <------><------><------><------>host, sizeof(*host), NULL); <------>kfree(host); <------>return ret; } static int nvme_configure_apst(struct nvme_ctrl *ctrl) { <------>/* <------> * APST (Autonomous Power State Transition) lets us program a <------> * table of power state transitions that the controller will <------> * perform automatically. We configure it with a simple <------> * heuristic: we are willing to spend at most 2% of the time <------> * transitioning between power states. Therefore, when running <------> * in any given state, we will enter the next lower-power <------> * non-operational state after waiting 50 * (enlat + exlat) <------> * microseconds, as long as that state's exit latency is under <------> * the requested maximum latency. <------> * <------> * We will not autonomously enter any non-operational state for <------> * which the total latency exceeds ps_max_latency_us. Users <------> * can set ps_max_latency_us to zero to turn off APST. <------> */ <------>unsigned apste; <------>struct nvme_feat_auto_pst *table; <------>u64 max_lat_us = 0; <------>int max_ps = -1; <------>int ret; <------>/* <------> * If APST isn't supported or if we haven't been initialized yet, <------> * then don't do anything. <------> */ <------>if (!ctrl->apsta) <------><------>return 0; <------>if (ctrl->npss > 31) { <------><------>dev_warn(ctrl->device, "NPSS is invalid; not using APST\n"); <------><------>return 0; <------>} <------>table = kzalloc(sizeof(*table), GFP_KERNEL); <------>if (!table) <------><------>return 0; <------>if (!ctrl->apst_enabled || ctrl->ps_max_latency_us == 0) { <------><------>/* Turn off APST. */ <------><------>apste = 0; <------><------>dev_dbg(ctrl->device, "APST disabled\n"); <------>} else { <------><------>__le64 target = cpu_to_le64(0); <------><------>int state; <------><------>/* <------><------> * Walk through all states from lowest- to highest-power. <------><------> * According to the spec, lower-numbered states use more <------><------> * power. NPSS, despite the name, is the index of the <------><------> * lowest-power state, not the number of states. <------><------> */ <------><------>for (state = (int)ctrl->npss; state >= 0; state--) { <------><------><------>u64 total_latency_us, exit_latency_us, transition_ms; <------><------><------>if (target) <------><------><------><------>table->entries[state] = target; <------><------><------>/* <------><------><------> * Don't allow transitions to the deepest state <------><------><------> * if it's quirked off. <------><------><------> */ <------><------><------>if (state == ctrl->npss && <------><------><------> (ctrl->quirks & NVME_QUIRK_NO_DEEPEST_PS)) <------><------><------><------>continue; <------><------><------>/* <------><------><------> * Is this state a useful non-operational state for <------><------><------> * higher-power states to autonomously transition to? <------><------><------> */ <------><------><------>if (!(ctrl->psd[state].flags & <------><------><------> NVME_PS_FLAGS_NON_OP_STATE)) <------><------><------><------>continue; <------><------><------>exit_latency_us = <------><------><------><------>(u64)le32_to_cpu(ctrl->psd[state].exit_lat); <------><------><------>if (exit_latency_us > ctrl->ps_max_latency_us) <------><------><------><------>continue; <------><------><------>total_latency_us = <------><------><------><------>exit_latency_us + <------><------><------><------>le32_to_cpu(ctrl->psd[state].entry_lat); <------><------><------>/* <------><------><------> * This state is good. Use it as the APST idle <------><------><------> * target for higher power states. <------><------><------> */ <------><------><------>transition_ms = total_latency_us + 19; <------><------><------>do_div(transition_ms, 20); <------><------><------>if (transition_ms > (1 << 24) - 1) <------><------><------><------>transition_ms = (1 << 24) - 1; <------><------><------>target = cpu_to_le64((state << 3) | <------><------><------><------><------> (transition_ms << 8)); <------><------><------>if (max_ps == -1) <------><------><------><------>max_ps = state; <------><------><------>if (total_latency_us > max_lat_us) <------><------><------><------>max_lat_us = total_latency_us; <------><------>} <------><------>apste = 1; <------><------>if (max_ps == -1) { <------><------><------>dev_dbg(ctrl->device, "APST enabled but no non-operational states are available\n"); <------><------>} else { <------><------><------>dev_dbg(ctrl->device, "APST enabled: max PS = %d, max round-trip latency = %lluus, table = %*phN\n", <------><------><------><------>max_ps, max_lat_us, (int)sizeof(*table), table); <------><------>} <------>} <------>ret = nvme_set_features(ctrl, NVME_FEAT_AUTO_PST, apste, <------><------><------><------>table, sizeof(*table), NULL); <------>if (ret) <------><------>dev_err(ctrl->device, "failed to set APST feature (%d)\n", ret); <------>kfree(table); <------>return ret; } static void nvme_set_latency_tolerance(struct device *dev, s32 val) { <------>struct nvme_ctrl *ctrl = dev_get_drvdata(dev); <------>u64 latency; <------>switch (val) { <------>case PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT: <------>case PM_QOS_LATENCY_ANY: <------><------>latency = U64_MAX; <------><------>break; <------>default: <------><------>latency = val; <------>} <------>if (ctrl->ps_max_latency_us != latency) { <------><------>ctrl->ps_max_latency_us = latency; <------><------>if (ctrl->state == NVME_CTRL_LIVE) <------><------><------>nvme_configure_apst(ctrl); <------>} } struct nvme_core_quirk_entry { <------>/* <------> * NVMe model and firmware strings are padded with spaces. For <------> * simplicity, strings in the quirk table are padded with NULLs <------> * instead. <------> */ <------>u16 vid; <------>const char *mn; <------>const char *fr; <------>unsigned long quirks; }; static const struct nvme_core_quirk_entry core_quirks[] = { <------>{ <------><------>/* <------><------> * This Toshiba device seems to die using any APST states. See: <------><------> * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1678184/comments/11 <------><------> */ <------><------>.vid = 0x1179, <------><------>.mn = "THNSF5256GPUK TOSHIBA", <------><------>.quirks = NVME_QUIRK_NO_APST, <------>}, <------>{ <------><------>/* <------><------> * This LiteON CL1-3D*-Q11 firmware version has a race <------><------> * condition associated with actions related to suspend to idle <------><------> * LiteON has resolved the problem in future firmware <------><------> */ <------><------>.vid = 0x14a4, <------><------>.fr = "22301111", <------><------>.quirks = NVME_QUIRK_SIMPLE_SUSPEND, <------>} }; /* match is null-terminated but idstr is space-padded. */ static bool string_matches(const char *idstr, const char *match, size_t len) { <------>size_t matchlen; <------>if (!match) <------><------>return true; <------>matchlen = strlen(match); <------>WARN_ON_ONCE(matchlen > len); <------>if (memcmp(idstr, match, matchlen)) <------><------>return false; <------>for (; matchlen < len; matchlen++) <------><------>if (idstr[matchlen] != ' ') <------><------><------>return false; <------>return true; } static bool quirk_matches(const struct nvme_id_ctrl *id, <------><------><------> const struct nvme_core_quirk_entry *q) { <------>return q->vid == le16_to_cpu(id->vid) && <------><------>string_matches(id->mn, q->mn, sizeof(id->mn)) && <------><------>string_matches(id->fr, q->fr, sizeof(id->fr)); } static void nvme_init_subnqn(struct nvme_subsystem *subsys, struct nvme_ctrl *ctrl, <------><------>struct nvme_id_ctrl *id) { <------>size_t nqnlen; <------>int off; <------>if(!(ctrl->quirks & NVME_QUIRK_IGNORE_DEV_SUBNQN)) { <------><------>nqnlen = strnlen(id->subnqn, NVMF_NQN_SIZE); <------><------>if (nqnlen > 0 && nqnlen < NVMF_NQN_SIZE) { <------><------><------>strlcpy(subsys->subnqn, id->subnqn, NVMF_NQN_SIZE); <------><------><------>return; <------><------>} <------><------>if (ctrl->vs >= NVME_VS(1, 2, 1)) <------><------><------>dev_warn(ctrl->device, "missing or invalid SUBNQN field.\n"); <------>} <------>/* Generate a "fake" NQN per Figure 254 in NVMe 1.3 + ECN 001 */ <------>off = snprintf(subsys->subnqn, NVMF_NQN_SIZE, <------><------><------>"nqn.2014.08.org.nvmexpress:%04x%04x", <------><------><------>le16_to_cpu(id->vid), le16_to_cpu(id->ssvid)); <------>memcpy(subsys->subnqn + off, id->sn, sizeof(id->sn)); <------>off += sizeof(id->sn); <------>memcpy(subsys->subnqn + off, id->mn, sizeof(id->mn)); <------>off += sizeof(id->mn); <------>memset(subsys->subnqn + off, 0, sizeof(subsys->subnqn) - off); } static void nvme_release_subsystem(struct device *dev) { <------>struct nvme_subsystem *subsys = <------><------>container_of(dev, struct nvme_subsystem, dev); <------>if (subsys->instance >= 0) <------><------>ida_simple_remove(&nvme_instance_ida, subsys->instance); <------>kfree(subsys); } static void nvme_destroy_subsystem(struct kref *ref) { <------>struct nvme_subsystem *subsys = <------><------><------>container_of(ref, struct nvme_subsystem, ref); <------>mutex_lock(&nvme_subsystems_lock); <------>list_del(&subsys->entry); <------>mutex_unlock(&nvme_subsystems_lock); <------>ida_destroy(&subsys->ns_ida); <------>device_del(&subsys->dev); <------>put_device(&subsys->dev); } static void nvme_put_subsystem(struct nvme_subsystem *subsys) { <------>kref_put(&subsys->ref, nvme_destroy_subsystem); } static struct nvme_subsystem *__nvme_find_get_subsystem(const char *subsysnqn) { <------>struct nvme_subsystem *subsys; <------>lockdep_assert_held(&nvme_subsystems_lock); <------>/* <------> * Fail matches for discovery subsystems. This results <------> * in each discovery controller bound to a unique subsystem. <------> * This avoids issues with validating controller values <------> * that can only be true when there is a single unique subsystem. <------> * There may be multiple and completely independent entities <------> * that provide discovery controllers. <------> */ <------>if (!strcmp(subsysnqn, NVME_DISC_SUBSYS_NAME)) <------><------>return NULL; <------>list_for_each_entry(subsys, &nvme_subsystems, entry) { <------><------>if (strcmp(subsys->subnqn, subsysnqn)) <------><------><------>continue; <------><------>if (!kref_get_unless_zero(&subsys->ref)) <------><------><------>continue; <------><------>return subsys; <------>} <------>return NULL; } #define SUBSYS_ATTR_RO(_name, _mode, _show) \ <------>struct device_attribute subsys_attr_##_name = \ <------><------>__ATTR(_name, _mode, _show, NULL) static ssize_t nvme_subsys_show_nqn(struct device *dev, <------><------><------><------> struct device_attribute *attr, <------><------><------><------> char *buf) { <------>struct nvme_subsystem *subsys = <------><------>container_of(dev, struct nvme_subsystem, dev); <------>return snprintf(buf, PAGE_SIZE, "%s\n", subsys->subnqn); } static SUBSYS_ATTR_RO(subsysnqn, S_IRUGO, nvme_subsys_show_nqn); #define nvme_subsys_show_str_function(field) \ static ssize_t subsys_##field##_show(struct device *dev, \ <------><------><------> struct device_attribute *attr, char *buf) \ { \ <------>struct nvme_subsystem *subsys = \ <------><------>container_of(dev, struct nvme_subsystem, dev); \ <------>return sprintf(buf, "%.*s\n", \ <------><------> (int)sizeof(subsys->field), subsys->field); \ } \ static SUBSYS_ATTR_RO(field, S_IRUGO, subsys_##field##_show); nvme_subsys_show_str_function(model); nvme_subsys_show_str_function(serial); nvme_subsys_show_str_function(firmware_rev); static struct attribute *nvme_subsys_attrs[] = { <------>&subsys_attr_model.attr, <------>&subsys_attr_serial.attr, <------>&subsys_attr_firmware_rev.attr, <------>&subsys_attr_subsysnqn.attr, #ifdef CONFIG_NVME_MULTIPATH <------>&subsys_attr_iopolicy.attr, #endif <------>NULL, }; static struct attribute_group nvme_subsys_attrs_group = { <------>.attrs = nvme_subsys_attrs, }; static const struct attribute_group *nvme_subsys_attrs_groups[] = { <------>&nvme_subsys_attrs_group, <------>NULL, }; static inline bool nvme_discovery_ctrl(struct nvme_ctrl *ctrl) { <------>return ctrl->opts && ctrl->opts->discovery_nqn; } static bool nvme_validate_cntlid(struct nvme_subsystem *subsys, <------><------>struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id) { <------>struct nvme_ctrl *tmp; <------>lockdep_assert_held(&nvme_subsystems_lock); <------>list_for_each_entry(tmp, &subsys->ctrls, subsys_entry) { <------><------>if (nvme_state_terminal(tmp)) <------><------><------>continue; <------><------>if (tmp->cntlid == ctrl->cntlid) { <------><------><------>dev_err(ctrl->device, <------><------><------><------>"Duplicate cntlid %u with %s, rejecting\n", <------><------><------><------>ctrl->cntlid, dev_name(tmp->device)); <------><------><------>return false; <------><------>} <------><------>if ((id->cmic & NVME_CTRL_CMIC_MULTI_CTRL) || <------><------> nvme_discovery_ctrl(ctrl)) <------><------><------>continue; <------><------>dev_err(ctrl->device, <------><------><------>"Subsystem does not support multiple controllers\n"); <------><------>return false; <------>} <------>return true; } static int nvme_init_subsystem(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id) { <------>struct nvme_subsystem *subsys, *found; <------>int ret; <------>subsys = kzalloc(sizeof(*subsys), GFP_KERNEL); <------>if (!subsys) <------><------>return -ENOMEM; <------>subsys->instance = -1; <------>mutex_init(&subsys->lock); <------>kref_init(&subsys->ref); <------>INIT_LIST_HEAD(&subsys->ctrls); <------>INIT_LIST_HEAD(&subsys->nsheads); <------>nvme_init_subnqn(subsys, ctrl, id); <------>memcpy(subsys->serial, id->sn, sizeof(subsys->serial)); <------>memcpy(subsys->model, id->mn, sizeof(subsys->model)); <------>memcpy(subsys->firmware_rev, id->fr, sizeof(subsys->firmware_rev)); <------>subsys->vendor_id = le16_to_cpu(id->vid); <------>subsys->cmic = id->cmic; <------>subsys->awupf = le16_to_cpu(id->awupf); #ifdef CONFIG_NVME_MULTIPATH <------>subsys->iopolicy = NVME_IOPOLICY_NUMA; #endif <------>subsys->dev.class = nvme_subsys_class; <------>subsys->dev.release = nvme_release_subsystem; <------>subsys->dev.groups = nvme_subsys_attrs_groups; <------>dev_set_name(&subsys->dev, "nvme-subsys%d", ctrl->instance); <------>device_initialize(&subsys->dev); <------>mutex_lock(&nvme_subsystems_lock); <------>found = __nvme_find_get_subsystem(subsys->subnqn); <------>if (found) { <------><------>put_device(&subsys->dev); <------><------>subsys = found; <------><------>if (!nvme_validate_cntlid(subsys, ctrl, id)) { <------><------><------>ret = -EINVAL; <------><------><------>goto out_put_subsystem; <------><------>} <------>} else { <------><------>ret = device_add(&subsys->dev); <------><------>if (ret) { <------><------><------>dev_err(ctrl->device, <------><------><------><------>"failed to register subsystem device.\n"); <------><------><------>put_device(&subsys->dev); <------><------><------>goto out_unlock; <------><------>} <------><------>ida_init(&subsys->ns_ida); <------><------>list_add_tail(&subsys->entry, &nvme_subsystems); <------>} <------>ret = sysfs_create_link(&subsys->dev.kobj, &ctrl->device->kobj, <------><------><------><------>dev_name(ctrl->device)); <------>if (ret) { <------><------>dev_err(ctrl->device, <------><------><------>"failed to create sysfs link from subsystem.\n"); <------><------>goto out_put_subsystem; <------>} <------>if (!found) <------><------>subsys->instance = ctrl->instance; <------>ctrl->subsys = subsys; <------>list_add_tail(&ctrl->subsys_entry, &subsys->ctrls); <------>mutex_unlock(&nvme_subsystems_lock); <------>return 0; out_put_subsystem: <------>nvme_put_subsystem(subsys); out_unlock: <------>mutex_unlock(&nvme_subsystems_lock); <------>return ret; } 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_command c = { }; <------>u32 dwlen = nvme_bytes_to_numd(size); <------>c.get_log_page.opcode = nvme_admin_get_log_page; <------>c.get_log_page.nsid = cpu_to_le32(nsid); <------>c.get_log_page.lid = log_page; <------>c.get_log_page.lsp = lsp; <------>c.get_log_page.numdl = cpu_to_le16(dwlen & ((1 << 16) - 1)); <------>c.get_log_page.numdu = cpu_to_le16(dwlen >> 16); <------>c.get_log_page.lpol = cpu_to_le32(lower_32_bits(offset)); <------>c.get_log_page.lpou = cpu_to_le32(upper_32_bits(offset)); <------>c.get_log_page.csi = csi; <------>return nvme_submit_sync_cmd(ctrl->admin_q, &c, log, size); } static int nvme_get_effects_log(struct nvme_ctrl *ctrl, u8 csi, <------><------><------><------>struct nvme_effects_log **log) { <------>struct nvme_effects_log *cel = xa_load(&ctrl->cels, csi); <------>int ret; <------>if (cel) <------><------>goto out; <------>cel = kzalloc(sizeof(*cel), GFP_KERNEL); <------>if (!cel) <------><------>return -ENOMEM; <------>ret = nvme_get_log(ctrl, 0x00, NVME_LOG_CMD_EFFECTS, 0, csi, <------><------><------>cel, sizeof(*cel), 0); <------>if (ret) { <------><------>kfree(cel); <------><------>return ret; <------>} <------>xa_store(&ctrl->cels, csi, cel, GFP_KERNEL); out: <------>*log = cel; <------>return 0; } /* * Initialize the cached copies of the Identify data and various controller * register in our nvme_ctrl structure. This should be called as soon as * the admin queue is fully up and running. */ int nvme_init_identify(struct nvme_ctrl *ctrl) { <------>struct nvme_id_ctrl *id; <------>int ret, page_shift; <------>u32 max_hw_sectors; <------>bool prev_apst_enabled; <------>ret = ctrl->ops->reg_read32(ctrl, NVME_REG_VS, &ctrl->vs); <------>if (ret) { <------><------>dev_err(ctrl->device, "Reading VS failed (%d)\n", ret); <------><------>return ret; <------>} <------>page_shift = NVME_CAP_MPSMIN(ctrl->cap) + 12; <------>ctrl->sqsize = min_t(u16, NVME_CAP_MQES(ctrl->cap), ctrl->sqsize); <------>if (ctrl->vs >= NVME_VS(1, 1, 0)) <------><------>ctrl->subsystem = NVME_CAP_NSSRC(ctrl->cap); <------>ret = nvme_identify_ctrl(ctrl, &id); <------>if (ret) { <------><------>dev_err(ctrl->device, "Identify Controller failed (%d)\n", ret); <------><------>return -EIO; <------>} <------>if (id->lpa & NVME_CTRL_LPA_CMD_EFFECTS_LOG) { <------><------>ret = nvme_get_effects_log(ctrl, NVME_CSI_NVM, &ctrl->effects); <------><------>if (ret < 0) <------><------><------>goto out_free; <------>} <------>if (!(ctrl->ops->flags & NVME_F_FABRICS)) <------><------>ctrl->cntlid = le16_to_cpu(id->cntlid); <------>if (!ctrl->identified) { <------><------>int i; <------><------>ret = nvme_init_subsystem(ctrl, id); <------><------>if (ret) <------><------><------>goto out_free; <------><------>/* <------><------> * Check for quirks. Quirk can depend on firmware version, <------><------> * so, in principle, the set of quirks present can change <------><------> * across a reset. As a possible future enhancement, we <------><------> * could re-scan for quirks every time we reinitialize <------><------> * the device, but we'd have to make sure that the driver <------><------> * behaves intelligently if the quirks change. <------><------> */ <------><------>for (i = 0; i < ARRAY_SIZE(core_quirks); i++) { <------><------><------>if (quirk_matches(id, &core_quirks[i])) <------><------><------><------>ctrl->quirks |= core_quirks[i].quirks; <------><------>} <------>} <------>if (force_apst && (ctrl->quirks & NVME_QUIRK_NO_DEEPEST_PS)) { <------><------>dev_warn(ctrl->device, "forcibly allowing all power states due to nvme_core.force_apst -- use at your own risk\n"); <------><------>ctrl->quirks &= ~NVME_QUIRK_NO_DEEPEST_PS; <------>} <------>ctrl->crdt[0] = le16_to_cpu(id->crdt1); <------>ctrl->crdt[1] = le16_to_cpu(id->crdt2); <------>ctrl->crdt[2] = le16_to_cpu(id->crdt3); <------>ctrl->oacs = le16_to_cpu(id->oacs); <------>ctrl->oncs = le16_to_cpu(id->oncs); <------>ctrl->mtfa = le16_to_cpu(id->mtfa); <------>ctrl->oaes = le32_to_cpu(id->oaes); <------>ctrl->wctemp = le16_to_cpu(id->wctemp); <------>ctrl->cctemp = le16_to_cpu(id->cctemp); <------>atomic_set(&ctrl->abort_limit, id->acl + 1); <------>ctrl->vwc = id->vwc; <------>if (id->mdts) <------><------>max_hw_sectors = 1 << (id->mdts + page_shift - 9); <------>else <------><------>max_hw_sectors = UINT_MAX; <------>ctrl->max_hw_sectors = <------><------>min_not_zero(ctrl->max_hw_sectors, max_hw_sectors); <------>nvme_set_queue_limits(ctrl, ctrl->admin_q); <------>ctrl->sgls = le32_to_cpu(id->sgls); <------>ctrl->kas = le16_to_cpu(id->kas); <------>ctrl->max_namespaces = le32_to_cpu(id->mnan); <------>ctrl->ctratt = le32_to_cpu(id->ctratt); <------>if (id->rtd3e) { <------><------>/* us -> s */ <------><------>u32 transition_time = le32_to_cpu(id->rtd3e) / USEC_PER_SEC; <------><------>ctrl->shutdown_timeout = clamp_t(unsigned int, transition_time, <------><------><------><------><------><------> shutdown_timeout, 60); <------><------>if (ctrl->shutdown_timeout != shutdown_timeout) <------><------><------>dev_info(ctrl->device, <------><------><------><------> "Shutdown timeout set to %u seconds\n", <------><------><------><------> ctrl->shutdown_timeout); <------>} else <------><------>ctrl->shutdown_timeout = shutdown_timeout; <------>ctrl->npss = id->npss; <------>ctrl->apsta = id->apsta; <------>prev_apst_enabled = ctrl->apst_enabled; <------>if (ctrl->quirks & NVME_QUIRK_NO_APST) { <------><------>if (force_apst && id->apsta) { <------><------><------>dev_warn(ctrl->device, "forcibly allowing APST due to nvme_core.force_apst -- use at your own risk\n"); <------><------><------>ctrl->apst_enabled = true; <------><------>} else { <------><------><------>ctrl->apst_enabled = false; <------><------>} <------>} else { <------><------>ctrl->apst_enabled = id->apsta; <------>} <------>memcpy(ctrl->psd, id->psd, sizeof(ctrl->psd)); <------>if (ctrl->ops->flags & NVME_F_FABRICS) { <------><------>ctrl->icdoff = le16_to_cpu(id->icdoff); <------><------>ctrl->ioccsz = le32_to_cpu(id->ioccsz); <------><------>ctrl->iorcsz = le32_to_cpu(id->iorcsz); <------><------>ctrl->maxcmd = le16_to_cpu(id->maxcmd); <------><------>/* <------><------> * In fabrics we need to verify the cntlid matches the <------><------> * admin connect <------><------> */ <------><------>if (ctrl->cntlid != le16_to_cpu(id->cntlid)) { <------><------><------>dev_err(ctrl->device, <------><------><------><------>"Mismatching cntlid: Connect %u vs Identify " <------><------><------><------>"%u, rejecting\n", <------><------><------><------>ctrl->cntlid, le16_to_cpu(id->cntlid)); <------><------><------>ret = -EINVAL; <------><------><------>goto out_free; <------><------>} <------><------>if (!nvme_discovery_ctrl(ctrl) && !ctrl->kas) { <------><------><------>dev_err(ctrl->device, <------><------><------><------>"keep-alive support is mandatory for fabrics\n"); <------><------><------>ret = -EINVAL; <------><------><------>goto out_free; <------><------>} <------>} else { <------><------>ctrl->hmpre = le32_to_cpu(id->hmpre); <------><------>ctrl->hmmin = le32_to_cpu(id->hmmin); <------><------>ctrl->hmminds = le32_to_cpu(id->hmminds); <------><------>ctrl->hmmaxd = le16_to_cpu(id->hmmaxd); <------>} <------>ret = nvme_mpath_init_identify(ctrl, id); <------>kfree(id); <------>if (ret < 0) <------><------>return ret; <------>if (ctrl->apst_enabled && !prev_apst_enabled) <------><------>dev_pm_qos_expose_latency_tolerance(ctrl->device); <------>else if (!ctrl->apst_enabled && prev_apst_enabled) <------><------>dev_pm_qos_hide_latency_tolerance(ctrl->device); <------>ret = nvme_configure_apst(ctrl); <------>if (ret < 0) <------><------>return ret; <------> <------>ret = nvme_configure_timestamp(ctrl); <------>if (ret < 0) <------><------>return ret; <------>ret = nvme_configure_directives(ctrl); <------>if (ret < 0) <------><------>return ret; <------>ret = nvme_configure_acre(ctrl); <------>if (ret < 0) <------><------>return ret; <------>if (!ctrl->identified && !nvme_discovery_ctrl(ctrl)) { <------><------>ret = nvme_hwmon_init(ctrl); <------><------>if (ret < 0) <------><------><------>return ret; <------>} <------>ctrl->identified = true; <------>return 0; out_free: <------>kfree(id); <------>return ret; } EXPORT_SYMBOL_GPL(nvme_init_identify); static int nvme_dev_open(struct inode *inode, struct file *file) { <------>struct nvme_ctrl *ctrl = <------><------>container_of(inode->i_cdev, struct nvme_ctrl, cdev); <------>switch (ctrl->state) { <------>case NVME_CTRL_LIVE: <------><------>break; <------>default: <------><------>return -EWOULDBLOCK; <------>} <------>nvme_get_ctrl(ctrl); <------>if (!try_module_get(ctrl->ops->module)) { <------><------>nvme_put_ctrl(ctrl); <------><------>return -EINVAL; <------>} <------>file->private_data = ctrl; <------>return 0; } static int nvme_dev_release(struct inode *inode, struct file *file) { <------>struct nvme_ctrl *ctrl = <------><------>container_of(inode->i_cdev, struct nvme_ctrl, cdev); <------>module_put(ctrl->ops->module); <------>nvme_put_ctrl(ctrl); <------>return 0; } static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp) { <------>struct nvme_ns *ns; <------>int ret; <------>down_read(&ctrl->namespaces_rwsem); <------>if (list_empty(&ctrl->namespaces)) { <------><------>ret = -ENOTTY; <------><------>goto out_unlock; <------>} <------>ns = list_first_entry(&ctrl->namespaces, struct nvme_ns, list); <------>if (ns != list_last_entry(&ctrl->namespaces, struct nvme_ns, list)) { <------><------>dev_warn(ctrl->device, <------><------><------>"NVME_IOCTL_IO_CMD not supported when multiple namespaces present!\n"); <------><------>ret = -EINVAL; <------><------>goto out_unlock; <------>} <------>dev_warn(ctrl->device, <------><------>"using deprecated NVME_IOCTL_IO_CMD ioctl on the char device!\n"); <------>kref_get(&ns->kref); <------>up_read(&ctrl->namespaces_rwsem); <------>ret = nvme_user_cmd(ctrl, ns, argp); <------>nvme_put_ns(ns); <------>return ret; out_unlock: <------>up_read(&ctrl->namespaces_rwsem); <------>return ret; } static long nvme_dev_ioctl(struct file *file, unsigned int cmd, <------><------>unsigned long arg) { <------>struct nvme_ctrl *ctrl = file->private_data; <------>void __user *argp = (void __user *)arg; <------>switch (cmd) { <------>case NVME_IOCTL_ADMIN_CMD: <------><------>return nvme_user_cmd(ctrl, NULL, argp); <------>case NVME_IOCTL_ADMIN64_CMD: <------><------>return nvme_user_cmd64(ctrl, NULL, argp); <------>case NVME_IOCTL_IO_CMD: <------><------>return nvme_dev_user_cmd(ctrl, argp); <------>case NVME_IOCTL_RESET: <------><------>dev_warn(ctrl->device, "resetting controller\n"); <------><------>return nvme_reset_ctrl_sync(ctrl); <------>case NVME_IOCTL_SUBSYS_RESET: <------><------>return nvme_reset_subsystem(ctrl); <------>case NVME_IOCTL_RESCAN: <------><------>nvme_queue_scan(ctrl); <------><------>return 0; <------>default: <------><------>return -ENOTTY; <------>} } static const struct file_operations nvme_dev_fops = { <------>.owner = THIS_MODULE, <------>.open = nvme_dev_open, <------>.release = nvme_dev_release, <------>.unlocked_ioctl = nvme_dev_ioctl, <------>.compat_ioctl = compat_ptr_ioctl, }; static ssize_t nvme_sysfs_reset(struct device *dev, <------><------><------><------>struct device_attribute *attr, const char *buf, <------><------><------><------>size_t count) { <------>struct nvme_ctrl *ctrl = dev_get_drvdata(dev); <------>int ret; <------>ret = nvme_reset_ctrl_sync(ctrl); <------>if (ret < 0) <------><------>return ret; <------>return count; } static DEVICE_ATTR(reset_controller, S_IWUSR, NULL, nvme_sysfs_reset); static ssize_t nvme_sysfs_rescan(struct device *dev, <------><------><------><------>struct device_attribute *attr, const char *buf, <------><------><------><------>size_t count) { <------>struct nvme_ctrl *ctrl = dev_get_drvdata(dev); <------>nvme_queue_scan(ctrl); <------>return count; } static DEVICE_ATTR(rescan_controller, S_IWUSR, NULL, nvme_sysfs_rescan); static inline struct nvme_ns_head *dev_to_ns_head(struct device *dev) { <------>struct gendisk *disk = dev_to_disk(dev); <------>if (disk->fops == &nvme_fops) <------><------>return nvme_get_ns_from_dev(dev)->head; <------>else <------><------>return disk->private_data; } static ssize_t wwid_show(struct device *dev, struct device_attribute *attr, <------><------>char *buf) { <------>struct nvme_ns_head *head = dev_to_ns_head(dev); <------>struct nvme_ns_ids *ids = &head->ids; <------>struct nvme_subsystem *subsys = head->subsys; <------>int serial_len = sizeof(subsys->serial); <------>int model_len = sizeof(subsys->model); <------>if (!uuid_is_null(&ids->uuid)) <------><------>return sprintf(buf, "uuid.%pU\n", &ids->uuid); <------>if (memchr_inv(ids->nguid, 0, sizeof(ids->nguid))) <------><------>return sprintf(buf, "eui.%16phN\n", ids->nguid); <------>if (memchr_inv(ids->eui64, 0, sizeof(ids->eui64))) <------><------>return sprintf(buf, "eui.%8phN\n", ids->eui64); <------>while (serial_len > 0 && (subsys->serial[serial_len - 1] == ' ' || <------><------><------><------> subsys->serial[serial_len - 1] == '\0')) <------><------>serial_len--; <------>while (model_len > 0 && (subsys->model[model_len - 1] == ' ' || <------><------><------><------> subsys->model[model_len - 1] == '\0')) <------><------>model_len--; <------>return sprintf(buf, "nvme.%04x-%*phN-%*phN-%08x\n", subsys->vendor_id, <------><------>serial_len, subsys->serial, model_len, subsys->model, <------><------>head->ns_id); } static DEVICE_ATTR_RO(wwid); static ssize_t nguid_show(struct device *dev, struct device_attribute *attr, <------><------>char *buf) { <------>return sprintf(buf, "%pU\n", dev_to_ns_head(dev)->ids.nguid); } static DEVICE_ATTR_RO(nguid); static ssize_t uuid_show(struct device *dev, struct device_attribute *attr, <------><------>char *buf) { <------>struct nvme_ns_ids *ids = &dev_to_ns_head(dev)->ids; <------>/* For backward compatibility expose the NGUID to userspace if <------> * we have no UUID set <------> */ <------>if (uuid_is_null(&ids->uuid)) { <------><------>printk_ratelimited(KERN_WARNING <------><------><------><------> "No UUID available providing old NGUID\n"); <------><------>return sprintf(buf, "%pU\n", ids->nguid); <------>} <------>return sprintf(buf, "%pU\n", &ids->uuid); } static DEVICE_ATTR_RO(uuid); static ssize_t eui_show(struct device *dev, struct device_attribute *attr, <------><------>char *buf) { <------>return sprintf(buf, "%8ph\n", dev_to_ns_head(dev)->ids.eui64); } static DEVICE_ATTR_RO(eui); static ssize_t nsid_show(struct device *dev, struct device_attribute *attr, <------><------>char *buf) { <------>return sprintf(buf, "%d\n", dev_to_ns_head(dev)->ns_id); } static DEVICE_ATTR_RO(nsid); static struct attribute *nvme_ns_id_attrs[] = { <------>&dev_attr_wwid.attr, <------>&dev_attr_uuid.attr, <------>&dev_attr_nguid.attr, <------>&dev_attr_eui.attr, <------>&dev_attr_nsid.attr, #ifdef CONFIG_NVME_MULTIPATH <------>&dev_attr_ana_grpid.attr, <------>&dev_attr_ana_state.attr, #endif <------>NULL, }; static umode_t nvme_ns_id_attrs_are_visible(struct kobject *kobj, <------><------>struct attribute *a, int n) { <------>struct device *dev = container_of(kobj, struct device, kobj); <------>struct nvme_ns_ids *ids = &dev_to_ns_head(dev)->ids; <------>if (a == &dev_attr_uuid.attr) { <------><------>if (uuid_is_null(&ids->uuid) && <------><------> !memchr_inv(ids->nguid, 0, sizeof(ids->nguid))) <------><------><------>return 0; <------>} <------>if (a == &dev_attr_nguid.attr) { <------><------>if (!memchr_inv(ids->nguid, 0, sizeof(ids->nguid))) <------><------><------>return 0; <------>} <------>if (a == &dev_attr_eui.attr) { <------><------>if (!memchr_inv(ids->eui64, 0, sizeof(ids->eui64))) <------><------><------>return 0; <------>} #ifdef CONFIG_NVME_MULTIPATH <------>if (a == &dev_attr_ana_grpid.attr || a == &dev_attr_ana_state.attr) { <------><------>if (dev_to_disk(dev)->fops != &nvme_fops) /* per-path attr */ <------><------><------>return 0; <------><------>if (!nvme_ctrl_use_ana(nvme_get_ns_from_dev(dev)->ctrl)) <------><------><------>return 0; <------>} #endif <------>return a->mode; } static const struct attribute_group nvme_ns_id_attr_group = { <------>.attrs = nvme_ns_id_attrs, <------>.is_visible = nvme_ns_id_attrs_are_visible, }; const struct attribute_group *nvme_ns_id_attr_groups[] = { <------>&nvme_ns_id_attr_group, #ifdef CONFIG_NVM <------>&nvme_nvm_attr_group, #endif <------>NULL, }; #define nvme_show_str_function(field) \ static ssize_t field##_show(struct device *dev, \ <------><------><------> struct device_attribute *attr, char *buf) \ { \ struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ return sprintf(buf, "%.*s\n", \ <------><------>(int)sizeof(ctrl->subsys->field), ctrl->subsys->field); \ } \ static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); nvme_show_str_function(model); nvme_show_str_function(serial); nvme_show_str_function(firmware_rev); #define nvme_show_int_function(field) \ static ssize_t field##_show(struct device *dev, \ <------><------><------> struct device_attribute *attr, char *buf) \ { \ struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ return sprintf(buf, "%d\n", ctrl->field); \ } \ static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); nvme_show_int_function(cntlid); nvme_show_int_function(numa_node); nvme_show_int_function(queue_count); nvme_show_int_function(sqsize); static ssize_t nvme_sysfs_delete(struct device *dev, <------><------><------><------>struct device_attribute *attr, const char *buf, <------><------><------><------>size_t count) { <------>struct nvme_ctrl *ctrl = dev_get_drvdata(dev); <------>if (device_remove_file_self(dev, attr)) <------><------>nvme_delete_ctrl_sync(ctrl); <------>return count; } static DEVICE_ATTR(delete_controller, S_IWUSR, NULL, nvme_sysfs_delete); static ssize_t nvme_sysfs_show_transport(struct device *dev, <------><------><------><------><------> struct device_attribute *attr, <------><------><------><------><------> char *buf) { <------>struct nvme_ctrl *ctrl = dev_get_drvdata(dev); <------>return snprintf(buf, PAGE_SIZE, "%s\n", ctrl->ops->name); } static DEVICE_ATTR(transport, S_IRUGO, nvme_sysfs_show_transport, NULL); static ssize_t nvme_sysfs_show_state(struct device *dev, <------><------><------><------> struct device_attribute *attr, <------><------><------><------> char *buf) { <------>struct nvme_ctrl *ctrl = dev_get_drvdata(dev); <------>static const char *const state_name[] = { <------><------>[NVME_CTRL_NEW] = "new", <------><------>[NVME_CTRL_LIVE] = "live", <------><------>[NVME_CTRL_RESETTING] = "resetting", <------><------>[NVME_CTRL_CONNECTING] = "connecting", <------><------>[NVME_CTRL_DELETING] = "deleting", <------><------>[NVME_CTRL_DELETING_NOIO]= "deleting (no IO)", <------><------>[NVME_CTRL_DEAD] = "dead", <------>}; <------>if ((unsigned)ctrl->state < ARRAY_SIZE(state_name) && <------> state_name[ctrl->state]) <------><------>return sprintf(buf, "%s\n", state_name[ctrl->state]); <------>return sprintf(buf, "unknown state\n"); } static DEVICE_ATTR(state, S_IRUGO, nvme_sysfs_show_state, NULL); static ssize_t nvme_sysfs_show_subsysnqn(struct device *dev, <------><------><------><------><------> struct device_attribute *attr, <------><------><------><------><------> char *buf) { <------>struct nvme_ctrl *ctrl = dev_get_drvdata(dev); <------>return snprintf(buf, PAGE_SIZE, "%s\n", ctrl->subsys->subnqn); } static DEVICE_ATTR(subsysnqn, S_IRUGO, nvme_sysfs_show_subsysnqn, NULL); static ssize_t nvme_sysfs_show_hostnqn(struct device *dev, <------><------><------><------><------>struct device_attribute *attr, <------><------><------><------><------>char *buf) { <------>struct nvme_ctrl *ctrl = dev_get_drvdata(dev); <------>return snprintf(buf, PAGE_SIZE, "%s\n", ctrl->opts->host->nqn); } static DEVICE_ATTR(hostnqn, S_IRUGO, nvme_sysfs_show_hostnqn, NULL); static ssize_t nvme_sysfs_show_hostid(struct device *dev, <------><------><------><------><------>struct device_attribute *attr, <------><------><------><------><------>char *buf) { <------>struct nvme_ctrl *ctrl = dev_get_drvdata(dev); <------>return snprintf(buf, PAGE_SIZE, "%pU\n", &ctrl->opts->host->id); } static DEVICE_ATTR(hostid, S_IRUGO, nvme_sysfs_show_hostid, NULL); static ssize_t nvme_sysfs_show_address(struct device *dev, <------><------><------><------><------> struct device_attribute *attr, <------><------><------><------><------> char *buf) { <------>struct nvme_ctrl *ctrl = dev_get_drvdata(dev); <------>return ctrl->ops->get_address(ctrl, buf, PAGE_SIZE); } static DEVICE_ATTR(address, S_IRUGO, nvme_sysfs_show_address, NULL); static ssize_t nvme_ctrl_loss_tmo_show(struct device *dev, <------><------>struct device_attribute *attr, char *buf) { <------>struct nvme_ctrl *ctrl = dev_get_drvdata(dev); <------>struct nvmf_ctrl_options *opts = ctrl->opts; <------>if (ctrl->opts->max_reconnects == -1) <------><------>return sprintf(buf, "off\n"); <------>return sprintf(buf, "%d\n", <------><------><------>opts->max_reconnects * opts->reconnect_delay); } static ssize_t nvme_ctrl_loss_tmo_store(struct device *dev, <------><------>struct device_attribute *attr, const char *buf, size_t count) { <------>struct nvme_ctrl *ctrl = dev_get_drvdata(dev); <------>struct nvmf_ctrl_options *opts = ctrl->opts; <------>int ctrl_loss_tmo, err; <------>err = kstrtoint(buf, 10, &ctrl_loss_tmo); <------>if (err) <------><------>return -EINVAL; <------>else if (ctrl_loss_tmo < 0) <------><------>opts->max_reconnects = -1; <------>else <------><------>opts->max_reconnects = DIV_ROUND_UP(ctrl_loss_tmo, <------><------><------><------><------><------>opts->reconnect_delay); <------>return count; } static DEVICE_ATTR(ctrl_loss_tmo, S_IRUGO | S_IWUSR, <------>nvme_ctrl_loss_tmo_show, nvme_ctrl_loss_tmo_store); static ssize_t nvme_ctrl_reconnect_delay_show(struct device *dev, <------><------>struct device_attribute *attr, char *buf) { <------>struct nvme_ctrl *ctrl = dev_get_drvdata(dev); <------>if (ctrl->opts->reconnect_delay == -1) <------><------>return sprintf(buf, "off\n"); <------>return sprintf(buf, "%d\n", ctrl->opts->reconnect_delay); } static ssize_t nvme_ctrl_reconnect_delay_store(struct device *dev, <------><------>struct device_attribute *attr, const char *buf, size_t count) { <------>struct nvme_ctrl *ctrl = dev_get_drvdata(dev); <------>unsigned int v; <------>int err; <------>err = kstrtou32(buf, 10, &v); <------>if (err) <------><------>return err; <------>ctrl->opts->reconnect_delay = v; <------>return count; } static DEVICE_ATTR(reconnect_delay, S_IRUGO | S_IWUSR, <------>nvme_ctrl_reconnect_delay_show, nvme_ctrl_reconnect_delay_store); static struct attribute *nvme_dev_attrs[] = { <------>&dev_attr_reset_controller.attr, <------>&dev_attr_rescan_controller.attr, <------>&dev_attr_model.attr, <------>&dev_attr_serial.attr, <------>&dev_attr_firmware_rev.attr, <------>&dev_attr_cntlid.attr, <------>&dev_attr_delete_controller.attr, <------>&dev_attr_transport.attr, <------>&dev_attr_subsysnqn.attr, <------>&dev_attr_address.attr, <------>&dev_attr_state.attr, <------>&dev_attr_numa_node.attr, <------>&dev_attr_queue_count.attr, <------>&dev_attr_sqsize.attr, <------>&dev_attr_hostnqn.attr, <------>&dev_attr_hostid.attr, <------>&dev_attr_ctrl_loss_tmo.attr, <------>&dev_attr_reconnect_delay.attr, <------>NULL }; static umode_t nvme_dev_attrs_are_visible(struct kobject *kobj, <------><------>struct attribute *a, int n) { <------>struct device *dev = container_of(kobj, struct device, kobj); <------>struct nvme_ctrl *ctrl = dev_get_drvdata(dev); <------>if (a == &dev_attr_delete_controller.attr && !ctrl->ops->delete_ctrl) <------><------>return 0; <------>if (a == &dev_attr_address.attr && !ctrl->ops->get_address) <------><------>return 0; <------>if (a == &dev_attr_hostnqn.attr && !ctrl->opts) <------><------>return 0; <------>if (a == &dev_attr_hostid.attr && !ctrl->opts) <------><------>return 0; <------>if (a == &dev_attr_ctrl_loss_tmo.attr && !ctrl->opts) <------><------>return 0; <------>if (a == &dev_attr_reconnect_delay.attr && !ctrl->opts) <------><------>return 0; <------>return a->mode; } static struct attribute_group nvme_dev_attrs_group = { <------>.attrs = nvme_dev_attrs, <------>.is_visible = nvme_dev_attrs_are_visible, }; static const struct attribute_group *nvme_dev_attr_groups[] = { <------>&nvme_dev_attrs_group, <------>NULL, }; static struct nvme_ns_head *nvme_find_ns_head(struct nvme_subsystem *subsys, <------><------>unsigned nsid) { <------>struct nvme_ns_head *h; <------>lockdep_assert_held(&subsys->lock); <------>list_for_each_entry(h, &subsys->nsheads, entry) { <------><------>if (h->ns_id == nsid && kref_get_unless_zero(&h->ref)) <------><------><------>return h; <------>} <------>return NULL; } static int nvme_subsys_check_duplicate_ids(struct nvme_subsystem *subsys, <------><------>struct nvme_ns_ids *ids) { <------>struct nvme_ns_head *h; <------>lockdep_assert_held(&subsys->lock); <------>list_for_each_entry(h, &subsys->nsheads, entry) { <------><------>if (nvme_ns_ids_valid(ids) && nvme_ns_ids_equal(ids, &h->ids)) <------><------><------>return -EINVAL; <------>} <------>return 0; } static struct nvme_ns_head *nvme_alloc_ns_head(struct nvme_ctrl *ctrl, <------><------>unsigned nsid, struct nvme_ns_ids *ids) { <------>struct nvme_ns_head *head; <------>size_t size = sizeof(*head); <------>int ret = -ENOMEM; #ifdef CONFIG_NVME_MULTIPATH <------>size += num_possible_nodes() * sizeof(struct nvme_ns *); #endif <------>head = kzalloc(size, GFP_KERNEL); <------>if (!head) <------><------>goto out; <------>ret = ida_simple_get(&ctrl->subsys->ns_ida, 1, 0, GFP_KERNEL); <------>if (ret < 0) <------><------>goto out_free_head; <------>head->instance = ret; <------>INIT_LIST_HEAD(&head->list); <------>ret = init_srcu_struct(&head->srcu); <------>if (ret) <------><------>goto out_ida_remove; <------>head->subsys = ctrl->subsys; <------>head->ns_id = nsid; <------>head->ids = *ids; <------>kref_init(&head->ref); <------>ret = nvme_subsys_check_duplicate_ids(ctrl->subsys, &head->ids); <------>if (ret) { <------><------>dev_err(ctrl->device, <------><------><------>"duplicate IDs for nsid %d\n", nsid); <------><------>goto out_cleanup_srcu; <------>} <------>if (head->ids.csi) { <------><------>ret = nvme_get_effects_log(ctrl, head->ids.csi, &head->effects); <------><------>if (ret) <------><------><------>goto out_cleanup_srcu; <------>} else <------><------>head->effects = ctrl->effects; <------>ret = nvme_mpath_alloc_disk(ctrl, head); <------>if (ret) <------><------>goto out_cleanup_srcu; <------>list_add_tail(&head->entry, &ctrl->subsys->nsheads); <------>kref_get(&ctrl->subsys->ref); <------>return head; out_cleanup_srcu: <------>cleanup_srcu_struct(&head->srcu); out_ida_remove: <------>ida_simple_remove(&ctrl->subsys->ns_ida, head->instance); out_free_head: <------>kfree(head); out: <------>if (ret > 0) <------><------>ret = blk_status_to_errno(nvme_error_status(ret)); <------>return ERR_PTR(ret); } static int nvme_init_ns_head(struct nvme_ns *ns, unsigned nsid, <------><------>struct nvme_ns_ids *ids, bool is_shared) { <------>struct nvme_ctrl *ctrl = ns->ctrl; <------>struct nvme_ns_head *head = NULL; <------>int ret = 0; <------>mutex_lock(&ctrl->subsys->lock); <------>head = nvme_find_ns_head(ctrl->subsys, nsid); <------>if (!head) { <------><------>head = nvme_alloc_ns_head(ctrl, nsid, ids); <------><------>if (IS_ERR(head)) { <------><------><------>ret = PTR_ERR(head); <------><------><------>goto out_unlock; <------><------>} <------><------>head->shared = is_shared; <------>} else { <------><------>ret = -EINVAL; <------><------>if (!is_shared || !head->shared) { <------><------><------>dev_err(ctrl->device, <------><------><------><------>"Duplicate unshared namespace %d\n", nsid); <------><------><------>goto out_put_ns_head; <------><------>} <------><------>if (!nvme_ns_ids_equal(&head->ids, ids)) { <------><------><------>dev_err(ctrl->device, <------><------><------><------>"IDs don't match for shared namespace %d\n", <------><------><------><------><------>nsid); <------><------><------>goto out_put_ns_head; <------><------>} <------>} <------>list_add_tail(&ns->siblings, &head->list); <------>ns->head = head; <------>mutex_unlock(&ctrl->subsys->lock); <------>return 0; out_put_ns_head: <------>nvme_put_ns_head(head); out_unlock: <------>mutex_unlock(&ctrl->subsys->lock); <------>return ret; } struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid) { <------>struct nvme_ns *ns, *ret = NULL; <------>down_read(&ctrl->namespaces_rwsem); <------>list_for_each_entry(ns, &ctrl->namespaces, list) { <------><------>if (ns->head->ns_id == nsid) { <------><------><------>if (!kref_get_unless_zero(&ns->kref)) <------><------><------><------>continue; <------><------><------>ret = ns; <------><------><------>break; <------><------>} <------><------>if (ns->head->ns_id > nsid) <------><------><------>break; <------>} <------>up_read(&ctrl->namespaces_rwsem); <------>return ret; } EXPORT_SYMBOL_NS_GPL(nvme_find_get_ns, NVME_TARGET_PASSTHRU); /* * Add the namespace to the controller list while keeping the list ordered. */ static void nvme_ns_add_to_ctrl_list(struct nvme_ns *ns) { <------>struct nvme_ns *tmp; <------>list_for_each_entry_reverse(tmp, &ns->ctrl->namespaces, list) { <------><------>if (tmp->head->ns_id < ns->head->ns_id) { <------><------><------>list_add(&ns->list, &tmp->list); <------><------><------>return; <------><------>} <------>} <------>list_add(&ns->list, &ns->ctrl->namespaces); } static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid, <------><------>struct nvme_ns_ids *ids) { <------>struct nvme_ns *ns; <------>struct gendisk *disk; <------>struct nvme_id_ns *id; <------>char disk_name[DISK_NAME_LEN]; <------>int node = ctrl->numa_node, flags = GENHD_FL_EXT_DEVT, ret; <------>if (nvme_identify_ns(ctrl, nsid, ids, &id)) <------><------>return; <------>ns = kzalloc_node(sizeof(*ns), GFP_KERNEL, node); <------>if (!ns) <------><------>goto out_free_id; <------>ns->queue = blk_mq_init_queue(ctrl->tagset); <------>if (IS_ERR(ns->queue)) <------><------>goto out_free_ns; <------>if (ctrl->opts && ctrl->opts->data_digest) <------><------>blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, ns->queue); <------>blk_queue_flag_set(QUEUE_FLAG_NONROT, ns->queue); <------>if (ctrl->ops->flags & NVME_F_PCI_P2PDMA) <------><------>blk_queue_flag_set(QUEUE_FLAG_PCI_P2PDMA, ns->queue); <------>ns->queue->queuedata = ns; <------>ns->ctrl = ctrl; <------>kref_init(&ns->kref); <------>ret = nvme_init_ns_head(ns, nsid, ids, id->nmic & NVME_NS_NMIC_SHARED); <------>if (ret) <------><------>goto out_free_queue; <------>nvme_set_disk_name(disk_name, ns, ctrl, &flags); <------>disk = alloc_disk_node(0, node); <------>if (!disk) <------><------>goto out_unlink_ns; <------>disk->fops = &nvme_fops; <------>disk->private_data = ns; <------>disk->queue = ns->queue; <------>disk->flags = flags; <------>memcpy(disk->disk_name, disk_name, DISK_NAME_LEN); <------>ns->disk = disk; <------>if (nvme_update_ns_info(ns, id)) <------><------>goto out_put_disk; <------>if ((ctrl->quirks & NVME_QUIRK_LIGHTNVM) && id->vs[0] == 0x1) { <------><------>ret = nvme_nvm_register(ns, disk_name, node); <------><------>if (ret) { <------><------><------>dev_warn(ctrl->device, "LightNVM init failure\n"); <------><------><------>goto out_put_disk; <------><------>} <------>} <------>down_write(&ctrl->namespaces_rwsem); <------>nvme_ns_add_to_ctrl_list(ns); <------>up_write(&ctrl->namespaces_rwsem); <------>nvme_get_ctrl(ctrl); <------>device_add_disk(ctrl->device, ns->disk, nvme_ns_id_attr_groups); <------>nvme_mpath_add_disk(ns, id); <------>nvme_fault_inject_init(&ns->fault_inject, ns->disk->disk_name); <------>kfree(id); <------>return; out_put_disk: <------>/* prevent double queue cleanup */ <------>ns->disk->queue = NULL; <------>put_disk(ns->disk); out_unlink_ns: <------>mutex_lock(&ctrl->subsys->lock); <------>list_del_rcu(&ns->siblings); <------>if (list_empty(&ns->head->list)) <------><------>list_del_init(&ns->head->entry); <------>mutex_unlock(&ctrl->subsys->lock); <------>nvme_put_ns_head(ns->head); out_free_queue: <------>blk_cleanup_queue(ns->queue); out_free_ns: <------>kfree(ns); out_free_id: <------>kfree(id); } static void nvme_ns_remove(struct nvme_ns *ns) { <------>if (test_and_set_bit(NVME_NS_REMOVING, &ns->flags)) <------><------>return; <------>set_capacity(ns->disk, 0); <------>nvme_fault_inject_fini(&ns->fault_inject); <------>mutex_lock(&ns->ctrl->subsys->lock); <------>list_del_rcu(&ns->siblings); <------>if (list_empty(&ns->head->list)) <------><------>list_del_init(&ns->head->entry); <------>mutex_unlock(&ns->ctrl->subsys->lock); <------>synchronize_rcu(); /* guarantee not available in head->list */ <------>nvme_mpath_clear_current_path(ns); <------>synchronize_srcu(&ns->head->srcu); /* wait for concurrent submissions */ <------>if (ns->disk->flags & GENHD_FL_UP) { <------><------>del_gendisk(ns->disk); <------><------>blk_cleanup_queue(ns->queue); <------><------>if (blk_get_integrity(ns->disk)) <------><------><------>blk_integrity_unregister(ns->disk); <------>} <------>down_write(&ns->ctrl->namespaces_rwsem); <------>list_del_init(&ns->list); <------>up_write(&ns->ctrl->namespaces_rwsem); <------>nvme_mpath_check_last_path(ns); <------>nvme_put_ns(ns); } static void nvme_ns_remove_by_nsid(struct nvme_ctrl *ctrl, u32 nsid) { <------>struct nvme_ns *ns = nvme_find_get_ns(ctrl, nsid); <------>if (ns) { <------><------>nvme_ns_remove(ns); <------><------>nvme_put_ns(ns); <------>} } static void nvme_validate_ns(struct nvme_ns *ns, struct nvme_ns_ids *ids) { <------>struct nvme_id_ns *id; <------>int ret = NVME_SC_INVALID_NS | NVME_SC_DNR; <------>if (test_bit(NVME_NS_DEAD, &ns->flags)) <------><------>goto out; <------>ret = nvme_identify_ns(ns->ctrl, ns->head->ns_id, ids, &id); <------>if (ret) <------><------>goto out; <------>ret = NVME_SC_INVALID_NS | NVME_SC_DNR; <------>if (!nvme_ns_ids_equal(&ns->head->ids, ids)) { <------><------>dev_err(ns->ctrl->device, <------><------><------>"identifiers changed for nsid %d\n", ns->head->ns_id); <------><------>goto out_free_id; <------>} <------>ret = nvme_update_ns_info(ns, id); out_free_id: <------>kfree(id); out: <------>/* <------> * Only remove the namespace if we got a fatal error back from the <------> * device, otherwise ignore the error and just move on. <------> * <------> * TODO: we should probably schedule a delayed retry here. <------> */ <------>if (ret > 0 && (ret & NVME_SC_DNR)) <------><------>nvme_ns_remove(ns); <------>else <------><------>revalidate_disk_size(ns->disk, true); } static void nvme_validate_or_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid) { <------>struct nvme_ns_ids ids = { }; <------>struct nvme_ns *ns; <------>if (nvme_identify_ns_descs(ctrl, nsid, &ids)) <------><------>return; <------>ns = nvme_find_get_ns(ctrl, nsid); <------>if (ns) { <------><------>nvme_validate_ns(ns, &ids); <------><------>nvme_put_ns(ns); <------><------>return; <------>} <------>switch (ids.csi) { <------>case NVME_CSI_NVM: <------><------>nvme_alloc_ns(ctrl, nsid, &ids); <------><------>break; <------>case NVME_CSI_ZNS: <------><------>if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED)) { <------><------><------>dev_warn(ctrl->device, <------><------><------><------>"nsid %u not supported without CONFIG_BLK_DEV_ZONED\n", <------><------><------><------>nsid); <------><------><------>break; <------><------>} <------><------>if (!nvme_multi_css(ctrl)) { <------><------><------>dev_warn(ctrl->device, <------><------><------><------>"command set not reported for nsid: %d\n", <------><------><------><------>nsid); <------><------><------>break; <------><------>} <------><------>nvme_alloc_ns(ctrl, nsid, &ids); <------><------>break; <------>default: <------><------>dev_warn(ctrl->device, "unknown csi %u for nsid %u\n", <------><------><------>ids.csi, nsid); <------><------>break; <------>} } static void nvme_remove_invalid_namespaces(struct nvme_ctrl *ctrl, <------><------><------><------><------>unsigned nsid) { <------>struct nvme_ns *ns, *next; <------>LIST_HEAD(rm_list); <------>down_write(&ctrl->namespaces_rwsem); <------>list_for_each_entry_safe(ns, next, &ctrl->namespaces, list) { <------><------>if (ns->head->ns_id > nsid || test_bit(NVME_NS_DEAD, &ns->flags)) <------><------><------>list_move_tail(&ns->list, &rm_list); <------>} <------>up_write(&ctrl->namespaces_rwsem); <------>list_for_each_entry_safe(ns, next, &rm_list, list) <------><------>nvme_ns_remove(ns); } static int nvme_scan_ns_list(struct nvme_ctrl *ctrl) { <------>const int nr_entries = NVME_IDENTIFY_DATA_SIZE / sizeof(__le32); <------>__le32 *ns_list; <------>u32 prev = 0; <------>int ret = 0, i; <------>if (nvme_ctrl_limited_cns(ctrl)) <------><------>return -EOPNOTSUPP; <------>ns_list = kzalloc(NVME_IDENTIFY_DATA_SIZE, GFP_KERNEL); <------>if (!ns_list) <------><------>return -ENOMEM; <------>for (;;) { <------><------>struct nvme_command cmd = { <------><------><------>.identify.opcode = nvme_admin_identify, <------><------><------>.identify.cns = NVME_ID_CNS_NS_ACTIVE_LIST, <------><------><------>.identify.nsid = cpu_to_le32(prev), <------><------>}; <------><------>ret = nvme_submit_sync_cmd(ctrl->admin_q, &cmd, ns_list, <------><------><------><------><------> NVME_IDENTIFY_DATA_SIZE); <------><------>if (ret) <------><------><------>goto free; <------><------>for (i = 0; i < nr_entries; i++) { <------><------><------>u32 nsid = le32_to_cpu(ns_list[i]); <------><------><------>if (!nsid) /* end of the list? */ <------><------><------><------>goto out; <------><------><------>nvme_validate_or_alloc_ns(ctrl, nsid); <------><------><------>while (++prev < nsid) <------><------><------><------>nvme_ns_remove_by_nsid(ctrl, prev); <------><------>} <------>} out: <------>nvme_remove_invalid_namespaces(ctrl, prev); free: <------>kfree(ns_list); <------>return ret; } static void nvme_scan_ns_sequential(struct nvme_ctrl *ctrl) { <------>struct nvme_id_ctrl *id; <------>u32 nn, i; <------>if (nvme_identify_ctrl(ctrl, &id)) <------><------>return; <------>nn = le32_to_cpu(id->nn); <------>kfree(id); <------>for (i = 1; i <= nn; i++) <------><------>nvme_validate_or_alloc_ns(ctrl, i); <------>nvme_remove_invalid_namespaces(ctrl, nn); } static void nvme_clear_changed_ns_log(struct nvme_ctrl *ctrl) { <------>size_t log_size = NVME_MAX_CHANGED_NAMESPACES * sizeof(__le32); <------>__le32 *log; <------>int error; <------>log = kzalloc(log_size, GFP_KERNEL); <------>if (!log) <------><------>return; <------>/* <------> * We need to read the log to clear the AEN, but we don't want to rely <------> * on it for the changed namespace information as userspace could have <------> * raced with us in reading the log page, which could cause us to miss <------> * updates. <------> */ <------>error = nvme_get_log(ctrl, NVME_NSID_ALL, NVME_LOG_CHANGED_NS, 0, <------><------><------>NVME_CSI_NVM, log, log_size, 0); <------>if (error) <------><------>dev_warn(ctrl->device, <------><------><------>"reading changed ns log failed: %d\n", error); <------>kfree(log); } static void nvme_scan_work(struct work_struct *work) { <------>struct nvme_ctrl *ctrl = <------><------>container_of(work, struct nvme_ctrl, scan_work); <------>/* No tagset on a live ctrl means IO queues could not created */ <------>if (ctrl->state != NVME_CTRL_LIVE || !ctrl->tagset) <------><------>return; <------>if (test_and_clear_bit(NVME_AER_NOTICE_NS_CHANGED, &ctrl->events)) { <------><------>dev_info(ctrl->device, "rescanning namespaces.\n"); <------><------>nvme_clear_changed_ns_log(ctrl); <------>} <------>mutex_lock(&ctrl->scan_lock); <------>if (nvme_scan_ns_list(ctrl) != 0) <------><------>nvme_scan_ns_sequential(ctrl); <------>mutex_unlock(&ctrl->scan_lock); } /* * This function iterates the namespace list unlocked to allow recovery from * controller failure. It is up to the caller to ensure the namespace list is * not modified by scan work while this function is executing. */ void nvme_remove_namespaces(struct nvme_ctrl *ctrl) { <------>struct nvme_ns *ns, *next; <------>LIST_HEAD(ns_list); <------>/* <------> * make sure to requeue I/O to all namespaces as these <------> * might result from the scan itself and must complete <------> * for the scan_work to make progress <------> */ <------>nvme_mpath_clear_ctrl_paths(ctrl); <------>/* prevent racing with ns scanning */ <------>flush_work(&ctrl->scan_work); <------>/* <------> * The dead states indicates the controller was not gracefully <------> * disconnected. In that case, we won't be able to flush any data while <------> * removing the namespaces' disks; fail all the queues now to avoid <------> * potentially having to clean up the failed sync later. <------> */ <------>if (ctrl->state == NVME_CTRL_DEAD) <------><------>nvme_kill_queues(ctrl); <------>/* this is a no-op when called from the controller reset handler */ <------>nvme_change_ctrl_state(ctrl, NVME_CTRL_DELETING_NOIO); <------>down_write(&ctrl->namespaces_rwsem); <------>list_splice_init(&ctrl->namespaces, &ns_list); <------>up_write(&ctrl->namespaces_rwsem); <------>list_for_each_entry_safe(ns, next, &ns_list, list) <------><------>nvme_ns_remove(ns); } EXPORT_SYMBOL_GPL(nvme_remove_namespaces); static int nvme_class_uevent(struct device *dev, struct kobj_uevent_env *env) { <------>struct nvme_ctrl *ctrl = <------><------>container_of(dev, struct nvme_ctrl, ctrl_device); <------>struct nvmf_ctrl_options *opts = ctrl->opts; <------>int ret; <------>ret = add_uevent_var(env, "NVME_TRTYPE=%s", ctrl->ops->name); <------>if (ret) <------><------>return ret; <------>if (opts) { <------><------>ret = add_uevent_var(env, "NVME_TRADDR=%s", opts->traddr); <------><------>if (ret) <------><------><------>return ret; <------><------>ret = add_uevent_var(env, "NVME_TRSVCID=%s", <------><------><------><------>opts->trsvcid ?: "none"); <------><------>if (ret) <------><------><------>return ret; <------><------>ret = add_uevent_var(env, "NVME_HOST_TRADDR=%s", <------><------><------><------>opts->host_traddr ?: "none"); <------>} <------>return ret; } static void nvme_aen_uevent(struct nvme_ctrl *ctrl) { <------>char *envp[2] = { NULL, NULL }; <------>u32 aen_result = ctrl->aen_result; <------>ctrl->aen_result = 0; <------>if (!aen_result) <------><------>return; <------>envp[0] = kasprintf(GFP_KERNEL, "NVME_AEN=%#08x", aen_result); <------>if (!envp[0]) <------><------>return; <------>kobject_uevent_env(&ctrl->device->kobj, KOBJ_CHANGE, envp); <------>kfree(envp[0]); } static void nvme_async_event_work(struct work_struct *work) { <------>struct nvme_ctrl *ctrl = <------><------>container_of(work, struct nvme_ctrl, async_event_work); <------>nvme_aen_uevent(ctrl); <------>/* <------> * The transport drivers must guarantee AER submission here is safe by <------> * flushing ctrl async_event_work after changing the controller state <------> * from LIVE and before freeing the admin queue. <------>*/ <------>if (ctrl->state == NVME_CTRL_LIVE) <------><------>ctrl->ops->submit_async_event(ctrl); } static bool nvme_ctrl_pp_status(struct nvme_ctrl *ctrl) { <------>u32 csts; <------>if (ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) <------><------>return false; <------>if (csts == ~0) <------><------>return false; <------>return ((ctrl->ctrl_config & NVME_CC_ENABLE) && (csts & NVME_CSTS_PP)); } static void nvme_get_fw_slot_info(struct nvme_ctrl *ctrl) { <------>struct nvme_fw_slot_info_log *log; <------>log = kmalloc(sizeof(*log), GFP_KERNEL); <------>if (!log) <------><------>return; <------>if (nvme_get_log(ctrl, NVME_NSID_ALL, NVME_LOG_FW_SLOT, 0, NVME_CSI_NVM, <------><------><------>log, sizeof(*log), 0)) <------><------>dev_warn(ctrl->device, "Get FW SLOT INFO log error\n"); <------>kfree(log); } static void nvme_fw_act_work(struct work_struct *work) { <------>struct nvme_ctrl *ctrl = container_of(work, <------><------><------><------>struct nvme_ctrl, fw_act_work); <------>unsigned long fw_act_timeout; <------>if (ctrl->mtfa) <------><------>fw_act_timeout = jiffies + <------><------><------><------>msecs_to_jiffies(ctrl->mtfa * 100); <------>else <------><------>fw_act_timeout = jiffies + <------><------><------><------>msecs_to_jiffies(admin_timeout * 1000); <------>nvme_stop_queues(ctrl); <------>while (nvme_ctrl_pp_status(ctrl)) { <------><------>if (time_after(jiffies, fw_act_timeout)) { <------><------><------>dev_warn(ctrl->device, <------><------><------><------>"Fw activation timeout, reset controller\n"); <------><------><------>nvme_try_sched_reset(ctrl); <------><------><------>return; <------><------>} <------><------>msleep(100); <------>} <------>if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_LIVE)) <------><------>return; <------>nvme_start_queues(ctrl); <------>/* read FW slot information to clear the AER */ <------>nvme_get_fw_slot_info(ctrl); } static void nvme_handle_aen_notice(struct nvme_ctrl *ctrl, u32 result) { <------>u32 aer_notice_type = (result & 0xff00) >> 8; <------>trace_nvme_async_event(ctrl, aer_notice_type); <------>switch (aer_notice_type) { <------>case NVME_AER_NOTICE_NS_CHANGED: <------><------>set_bit(NVME_AER_NOTICE_NS_CHANGED, &ctrl->events); <------><------>nvme_queue_scan(ctrl); <------><------>break; <------>case NVME_AER_NOTICE_FW_ACT_STARTING: <------><------>/* <------><------> * We are (ab)using the RESETTING state to prevent subsequent <------><------> * recovery actions from interfering with the controller's <------><------> * firmware activation. <------><------> */ <------><------>if (nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING)) <------><------><------>queue_work(nvme_wq, &ctrl->fw_act_work); <------><------>break; #ifdef CONFIG_NVME_MULTIPATH <------>case NVME_AER_NOTICE_ANA: <------><------>if (!ctrl->ana_log_buf) <------><------><------>break; <------><------>queue_work(nvme_wq, &ctrl->ana_work); <------><------>break; #endif <------>case NVME_AER_NOTICE_DISC_CHANGED: <------><------>ctrl->aen_result = result; <------><------>break; <------>default: <------><------>dev_warn(ctrl->device, "async event result %08x\n", result); <------>} } void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status, <------><------>volatile union nvme_result *res) { <------>u32 result = le32_to_cpu(res->u32); <------>u32 aer_type = result & 0x07; <------>if (le16_to_cpu(status) >> 1 != NVME_SC_SUCCESS) <------><------>return; <------>switch (aer_type) { <------>case NVME_AER_NOTICE: <------><------>nvme_handle_aen_notice(ctrl, result); <------><------>break; <------>case NVME_AER_ERROR: <------>case NVME_AER_SMART: <------>case NVME_AER_CSS: <------>case NVME_AER_VS: <------><------>trace_nvme_async_event(ctrl, aer_type); <------><------>ctrl->aen_result = result; <------><------>break; <------>default: <------><------>break; <------>} <------>queue_work(nvme_wq, &ctrl->async_event_work); } EXPORT_SYMBOL_GPL(nvme_complete_async_event); void nvme_stop_ctrl(struct nvme_ctrl *ctrl) { <------>nvme_mpath_stop(ctrl); <------>nvme_stop_keep_alive(ctrl); <------>flush_work(&ctrl->async_event_work); <------>cancel_work_sync(&ctrl->fw_act_work); } EXPORT_SYMBOL_GPL(nvme_stop_ctrl); void nvme_start_ctrl(struct nvme_ctrl *ctrl) { <------>nvme_start_keep_alive(ctrl); <------>nvme_enable_aen(ctrl); <------>if (ctrl->queue_count > 1) { <------><------>nvme_queue_scan(ctrl); <------><------>nvme_start_queues(ctrl); <------>} } EXPORT_SYMBOL_GPL(nvme_start_ctrl); void nvme_uninit_ctrl(struct nvme_ctrl *ctrl) { <------>nvme_fault_inject_fini(&ctrl->fault_inject); <------>dev_pm_qos_hide_latency_tolerance(ctrl->device); <------>cdev_device_del(&ctrl->cdev, ctrl->device); <------>nvme_put_ctrl(ctrl); } EXPORT_SYMBOL_GPL(nvme_uninit_ctrl); static void nvme_free_cels(struct nvme_ctrl *ctrl) { <------>struct nvme_effects_log *cel; <------>unsigned long i; <------>xa_for_each (&ctrl->cels, i, cel) { <------><------>xa_erase(&ctrl->cels, i); <------><------>kfree(cel); <------>} <------>xa_destroy(&ctrl->cels); } static void nvme_free_ctrl(struct device *dev) { <------>struct nvme_ctrl *ctrl = <------><------>container_of(dev, struct nvme_ctrl, ctrl_device); <------>struct nvme_subsystem *subsys = ctrl->subsys; <------>if (!subsys || ctrl->instance != subsys->instance) <------><------>ida_simple_remove(&nvme_instance_ida, ctrl->instance); <------>nvme_free_cels(ctrl); <------>nvme_mpath_uninit(ctrl); <------>__free_page(ctrl->discard_page); <------>if (subsys) { <------><------>mutex_lock(&nvme_subsystems_lock); <------><------>list_del(&ctrl->subsys_entry); <------><------>sysfs_remove_link(&subsys->dev.kobj, dev_name(ctrl->device)); <------><------>mutex_unlock(&nvme_subsystems_lock); <------>} <------>ctrl->ops->free_ctrl(ctrl); <------>if (subsys) <------><------>nvme_put_subsystem(subsys); } /* * Initialize a NVMe controller structures. This needs to be called during * earliest initialization so that we have the initialized structured around * during probing. */ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, <------><------>const struct nvme_ctrl_ops *ops, unsigned long quirks) { <------>int ret; <------>ctrl->state = NVME_CTRL_NEW; <------>spin_lock_init(&ctrl->lock); <------>mutex_init(&ctrl->scan_lock); <------>INIT_LIST_HEAD(&ctrl->namespaces); <------>xa_init(&ctrl->cels); <------>init_rwsem(&ctrl->namespaces_rwsem); <------>ctrl->dev = dev; <------>ctrl->ops = ops; <------>ctrl->quirks = quirks; <------>ctrl->numa_node = NUMA_NO_NODE; <------>INIT_WORK(&ctrl->scan_work, nvme_scan_work); <------>INIT_WORK(&ctrl->async_event_work, nvme_async_event_work); <------>INIT_WORK(&ctrl->fw_act_work, nvme_fw_act_work); <------>INIT_WORK(&ctrl->delete_work, nvme_delete_ctrl_work); <------>init_waitqueue_head(&ctrl->state_wq); <------>INIT_DELAYED_WORK(&ctrl->ka_work, nvme_keep_alive_work); <------>memset(&ctrl->ka_cmd, 0, sizeof(ctrl->ka_cmd)); <------>ctrl->ka_cmd.common.opcode = nvme_admin_keep_alive; <------>BUILD_BUG_ON(NVME_DSM_MAX_RANGES * sizeof(struct nvme_dsm_range) > <------><------><------>PAGE_SIZE); <------>ctrl->discard_page = alloc_page(GFP_KERNEL); <------>if (!ctrl->discard_page) { <------><------>ret = -ENOMEM; <------><------>goto out; <------>} <------>ret = ida_simple_get(&nvme_instance_ida, 0, 0, GFP_KERNEL); <------>if (ret < 0) <------><------>goto out; <------>ctrl->instance = ret; <------>device_initialize(&ctrl->ctrl_device); <------>ctrl->device = &ctrl->ctrl_device; <------>ctrl->device->devt = MKDEV(MAJOR(nvme_chr_devt), ctrl->instance); <------>ctrl->device->class = nvme_class; <------>ctrl->device->parent = ctrl->dev; <------>ctrl->device->groups = nvme_dev_attr_groups; <------>ctrl->device->release = nvme_free_ctrl; <------>dev_set_drvdata(ctrl->device, ctrl); <------>ret = dev_set_name(ctrl->device, "nvme%d", ctrl->instance); <------>if (ret) <------><------>goto out_release_instance; <------>nvme_get_ctrl(ctrl); <------>cdev_init(&ctrl->cdev, &nvme_dev_fops); <------>ctrl->cdev.owner = ops->module; <------>ret = cdev_device_add(&ctrl->cdev, ctrl->device); <------>if (ret) <------><------>goto out_free_name; <------>/* <------> * Initialize latency tolerance controls. The sysfs files won't <------> * be visible to userspace unless the device actually supports APST. <------> */ <------>ctrl->device->power.set_latency_tolerance = nvme_set_latency_tolerance; <------>dev_pm_qos_update_user_latency_tolerance(ctrl->device, <------><------>min(default_ps_max_latency_us, (unsigned long)S32_MAX)); <------>nvme_fault_inject_init(&ctrl->fault_inject, dev_name(ctrl->device)); <------>nvme_mpath_init_ctrl(ctrl); <------>return 0; out_free_name: <------>nvme_put_ctrl(ctrl); <------>kfree_const(ctrl->device->kobj.name); out_release_instance: <------>ida_simple_remove(&nvme_instance_ida, ctrl->instance); out: <------>if (ctrl->discard_page) <------><------>__free_page(ctrl->discard_page); <------>return ret; } EXPORT_SYMBOL_GPL(nvme_init_ctrl); /** * nvme_kill_queues(): Ends all namespace queues * @ctrl: the dead controller that needs to end * * Call this function when the driver determines it is unable to get the * controller in a state capable of servicing IO. */ void nvme_kill_queues(struct nvme_ctrl *ctrl) { <------>struct nvme_ns *ns; <------>down_read(&ctrl->namespaces_rwsem); <------>/* Forcibly unquiesce queues to avoid blocking dispatch */ <------>if (ctrl->admin_q && !blk_queue_dying(ctrl->admin_q)) <------><------>blk_mq_unquiesce_queue(ctrl->admin_q); <------>list_for_each_entry(ns, &ctrl->namespaces, list) <------><------>nvme_set_queue_dying(ns); <------>up_read(&ctrl->namespaces_rwsem); } EXPORT_SYMBOL_GPL(nvme_kill_queues); void nvme_unfreeze(struct nvme_ctrl *ctrl) { <------>struct nvme_ns *ns; <------>down_read(&ctrl->namespaces_rwsem); <------>list_for_each_entry(ns, &ctrl->namespaces, list) <------><------>blk_mq_unfreeze_queue(ns->queue); <------>up_read(&ctrl->namespaces_rwsem); } EXPORT_SYMBOL_GPL(nvme_unfreeze); int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout) { <------>struct nvme_ns *ns; <------>down_read(&ctrl->namespaces_rwsem); <------>list_for_each_entry(ns, &ctrl->namespaces, list) { <------><------>timeout = blk_mq_freeze_queue_wait_timeout(ns->queue, timeout); <------><------>if (timeout <= 0) <------><------><------>break; <------>} <------>up_read(&ctrl->namespaces_rwsem); <------>return timeout; } EXPORT_SYMBOL_GPL(nvme_wait_freeze_timeout); void nvme_wait_freeze(struct nvme_ctrl *ctrl) { <------>struct nvme_ns *ns; <------>down_read(&ctrl->namespaces_rwsem); <------>list_for_each_entry(ns, &ctrl->namespaces, list) <------><------>blk_mq_freeze_queue_wait(ns->queue); <------>up_read(&ctrl->namespaces_rwsem); } EXPORT_SYMBOL_GPL(nvme_wait_freeze); void nvme_start_freeze(struct nvme_ctrl *ctrl) { <------>struct nvme_ns *ns; <------>down_read(&ctrl->namespaces_rwsem); <------>list_for_each_entry(ns, &ctrl->namespaces, list) <------><------>blk_freeze_queue_start(ns->queue); <------>up_read(&ctrl->namespaces_rwsem); } EXPORT_SYMBOL_GPL(nvme_start_freeze); void nvme_stop_queues(struct nvme_ctrl *ctrl) { <------>struct nvme_ns *ns; <------>down_read(&ctrl->namespaces_rwsem); <------>list_for_each_entry(ns, &ctrl->namespaces, list) <------><------>blk_mq_quiesce_queue(ns->queue); <------>up_read(&ctrl->namespaces_rwsem); } EXPORT_SYMBOL_GPL(nvme_stop_queues); void nvme_start_queues(struct nvme_ctrl *ctrl) { <------>struct nvme_ns *ns; <------>down_read(&ctrl->namespaces_rwsem); <------>list_for_each_entry(ns, &ctrl->namespaces, list) <------><------>blk_mq_unquiesce_queue(ns->queue); <------>up_read(&ctrl->namespaces_rwsem); } EXPORT_SYMBOL_GPL(nvme_start_queues); void nvme_sync_io_queues(struct nvme_ctrl *ctrl) { <------>struct nvme_ns *ns; <------>down_read(&ctrl->namespaces_rwsem); <------>list_for_each_entry(ns, &ctrl->namespaces, list) <------><------>blk_sync_queue(ns->queue); <------>up_read(&ctrl->namespaces_rwsem); } EXPORT_SYMBOL_GPL(nvme_sync_io_queues); void nvme_sync_queues(struct nvme_ctrl *ctrl) { <------>nvme_sync_io_queues(ctrl); <------>if (ctrl->admin_q) <------><------>blk_sync_queue(ctrl->admin_q); } EXPORT_SYMBOL_GPL(nvme_sync_queues); struct nvme_ctrl *nvme_ctrl_from_file(struct file *file) { <------>if (file->f_op != &nvme_dev_fops) <------><------>return NULL; <------>return file->private_data; } EXPORT_SYMBOL_NS_GPL(nvme_ctrl_from_file, NVME_TARGET_PASSTHRU); /* * Check we didn't inadvertently grow the command structure sizes: */ static inline void _nvme_check_size(void) { <------>BUILD_BUG_ON(sizeof(struct nvme_common_command) != 64); <------>BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); <------>BUILD_BUG_ON(sizeof(struct nvme_identify) != 64); <------>BUILD_BUG_ON(sizeof(struct nvme_features) != 64); <------>BUILD_BUG_ON(sizeof(struct nvme_download_firmware) != 64); <------>BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); <------>BUILD_BUG_ON(sizeof(struct nvme_dsm_cmd) != 64); <------>BUILD_BUG_ON(sizeof(struct nvme_write_zeroes_cmd) != 64); <------>BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); <------>BUILD_BUG_ON(sizeof(struct nvme_get_log_page_command) != 64); <------>BUILD_BUG_ON(sizeof(struct nvme_command) != 64); <------>BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != NVME_IDENTIFY_DATA_SIZE); <------>BUILD_BUG_ON(sizeof(struct nvme_id_ns) != NVME_IDENTIFY_DATA_SIZE); <------>BUILD_BUG_ON(sizeof(struct nvme_id_ns_zns) != NVME_IDENTIFY_DATA_SIZE); <------>BUILD_BUG_ON(sizeof(struct nvme_id_ctrl_zns) != NVME_IDENTIFY_DATA_SIZE); <------>BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); <------>BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); <------>BUILD_BUG_ON(sizeof(struct nvme_dbbuf) != 64); <------>BUILD_BUG_ON(sizeof(struct nvme_directive_cmd) != 64); } static int __init nvme_core_init(void) { <------>int result = -ENOMEM; <------>_nvme_check_size(); <------>nvme_wq = alloc_workqueue("nvme-wq", <------><------><------>WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_SYSFS, 0); <------>if (!nvme_wq) <------><------>goto out; <------>nvme_reset_wq = alloc_workqueue("nvme-reset-wq", <------><------><------>WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_SYSFS, 0); <------>if (!nvme_reset_wq) <------><------>goto destroy_wq; <------>nvme_delete_wq = alloc_workqueue("nvme-delete-wq", <------><------><------>WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_SYSFS, 0); <------>if (!nvme_delete_wq) <------><------>goto destroy_reset_wq; <------>result = alloc_chrdev_region(&nvme_chr_devt, 0, NVME_MINORS, "nvme"); <------>if (result < 0) <------><------>goto destroy_delete_wq; <------>nvme_class = class_create(THIS_MODULE, "nvme"); <------>if (IS_ERR(nvme_class)) { <------><------>result = PTR_ERR(nvme_class); <------><------>goto unregister_chrdev; <------>} <------>nvme_class->dev_uevent = nvme_class_uevent; <------>nvme_subsys_class = class_create(THIS_MODULE, "nvme-subsystem"); <------>if (IS_ERR(nvme_subsys_class)) { <------><------>result = PTR_ERR(nvme_subsys_class); <------><------>goto destroy_class; <------>} <------>return 0; destroy_class: <------>class_destroy(nvme_class); unregister_chrdev: <------>unregister_chrdev_region(nvme_chr_devt, NVME_MINORS); destroy_delete_wq: <------>destroy_workqueue(nvme_delete_wq); destroy_reset_wq: <------>destroy_workqueue(nvme_reset_wq); destroy_wq: <------>destroy_workqueue(nvme_wq); out: <------>return result; } static void __exit nvme_core_exit(void) { <------>class_destroy(nvme_subsys_class); <------>class_destroy(nvme_class); <------>unregister_chrdev_region(nvme_chr_devt, NVME_MINORS); <------>destroy_workqueue(nvme_delete_wq); <------>destroy_workqueue(nvme_reset_wq); <------>destroy_workqueue(nvme_wq); <------>ida_destroy(&nvme_instance_ida); } MODULE_LICENSE("GPL"); MODULE_VERSION("1.0"); module_init(nvme_core_init); module_exit(nvme_core_exit);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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