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|
- // 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;
- }
- if (ctrl->quirks & NVME_QUIRK_BOGUS_NID)
- return NVME_NIDT_EUI64_LEN;
- 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;
- }
- if (ctrl->quirks & NVME_QUIRK_BOGUS_NID)
- return NVME_NIDT_NGUID_LEN;
- 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;
- }
- if (ctrl->quirks & NVME_QUIRK_BOGUS_NID)
- return NVME_NIDT_UUID_LEN;
- 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->quirks & NVME_QUIRK_BOGUS_NID) {
- dev_info(ctrl->device,
- "Ignoring bogus Namespace Identifiers\n");
- } else {
- 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);
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