![Jens Axboe](/assets/img/avatar_default.png)
Pull NVMe fixes from Christoph: "Fix various little regressions introduced in this merge window, plus a rework of the fibre channel connect and reconnect path to share the code instead of having separate sets of bugs. Last but not least a trivial trace point addition from Hannes." * 'nvme-4.18' of git://git.infradead.org/nvme: nvme-fabrics: fix and refine state checks in __nvmf_check_ready nvme-fabrics: handle the admin-only case properly in nvmf_check_ready nvme-fabrics: refactor queue ready check blk-mq: remove blk_mq_tagset_iter nvme: remove nvme_reinit_tagset nvme-fc: fix nulling of queue data on reconnect nvme-fc: remove reinit_request routine nvme-fc: change controllers first connect to use reconnect path nvme: don't rely on the changed namespace list log nvmet: free smart-log buffer after use nvme-rdma: fix error flow during mapping request data nvme: add bio remapping tracepoint nvme: fix NULL pointer dereference in nvme_init_subsystem
3695 lines
92 KiB
C
3695 lines
92 KiB
C
/*
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* NVM Express device driver
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* Copyright (c) 2011-2014, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <linux/blkdev.h>
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#include <linux/blk-mq.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/hdreg.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/list_sort.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/pr.h>
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#include <linux/ptrace.h>
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#include <linux/nvme_ioctl.h>
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#include <linux/t10-pi.h>
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#include <linux/pm_qos.h>
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#include <asm/unaligned.h>
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#define CREATE_TRACE_POINTS
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#include "trace.h"
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#include "nvme.h"
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#include "fabrics.h"
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#define NVME_MINORS (1U << MINORBITS)
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unsigned int admin_timeout = 60;
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module_param(admin_timeout, uint, 0644);
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MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands");
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EXPORT_SYMBOL_GPL(admin_timeout);
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unsigned int nvme_io_timeout = 30;
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module_param_named(io_timeout, nvme_io_timeout, uint, 0644);
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MODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O");
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EXPORT_SYMBOL_GPL(nvme_io_timeout);
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static unsigned char shutdown_timeout = 5;
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module_param(shutdown_timeout, byte, 0644);
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MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown");
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static u8 nvme_max_retries = 5;
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module_param_named(max_retries, nvme_max_retries, byte, 0644);
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MODULE_PARM_DESC(max_retries, "max number of retries a command may have");
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static unsigned long default_ps_max_latency_us = 100000;
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module_param(default_ps_max_latency_us, ulong, 0644);
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MODULE_PARM_DESC(default_ps_max_latency_us,
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"max power saving latency for new devices; use PM QOS to change per device");
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static bool force_apst;
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module_param(force_apst, bool, 0644);
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MODULE_PARM_DESC(force_apst, "allow APST for newly enumerated devices even if quirked off");
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static bool streams;
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module_param(streams, bool, 0644);
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MODULE_PARM_DESC(streams, "turn on support for Streams write directives");
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/*
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* nvme_wq - hosts nvme related works that are not reset or delete
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* nvme_reset_wq - hosts nvme reset works
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* nvme_delete_wq - hosts nvme delete works
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*
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* nvme_wq will host works such are scan, aen handling, fw activation,
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* keep-alive error recovery, periodic reconnects etc. nvme_reset_wq
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* runs reset works which also flush works hosted on nvme_wq for
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* serialization purposes. nvme_delete_wq host controller deletion
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* works which flush reset works for serialization.
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*/
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struct workqueue_struct *nvme_wq;
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EXPORT_SYMBOL_GPL(nvme_wq);
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struct workqueue_struct *nvme_reset_wq;
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EXPORT_SYMBOL_GPL(nvme_reset_wq);
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struct workqueue_struct *nvme_delete_wq;
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EXPORT_SYMBOL_GPL(nvme_delete_wq);
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static DEFINE_IDA(nvme_subsystems_ida);
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static LIST_HEAD(nvme_subsystems);
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static DEFINE_MUTEX(nvme_subsystems_lock);
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static DEFINE_IDA(nvme_instance_ida);
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static dev_t nvme_chr_devt;
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static struct class *nvme_class;
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static struct class *nvme_subsys_class;
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static void nvme_ns_remove(struct nvme_ns *ns);
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static int nvme_revalidate_disk(struct gendisk *disk);
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static void nvme_put_subsystem(struct nvme_subsystem *subsys);
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static void nvme_queue_scan(struct nvme_ctrl *ctrl)
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{
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/*
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* Only new queue scan work when admin and IO queues are both alive
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*/
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if (ctrl->state == NVME_CTRL_LIVE)
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queue_work(nvme_wq, &ctrl->scan_work);
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}
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int nvme_reset_ctrl(struct nvme_ctrl *ctrl)
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{
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if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING))
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return -EBUSY;
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if (!queue_work(nvme_reset_wq, &ctrl->reset_work))
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return -EBUSY;
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return 0;
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}
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EXPORT_SYMBOL_GPL(nvme_reset_ctrl);
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int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl)
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{
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int ret;
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ret = nvme_reset_ctrl(ctrl);
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if (!ret) {
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flush_work(&ctrl->reset_work);
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if (ctrl->state != NVME_CTRL_LIVE &&
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ctrl->state != NVME_CTRL_ADMIN_ONLY)
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ret = -ENETRESET;
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(nvme_reset_ctrl_sync);
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static void nvme_delete_ctrl_work(struct work_struct *work)
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{
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struct nvme_ctrl *ctrl =
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container_of(work, struct nvme_ctrl, delete_work);
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dev_info(ctrl->device,
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"Removing ctrl: NQN \"%s\"\n", ctrl->opts->subsysnqn);
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flush_work(&ctrl->reset_work);
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nvme_stop_ctrl(ctrl);
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nvme_remove_namespaces(ctrl);
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ctrl->ops->delete_ctrl(ctrl);
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nvme_uninit_ctrl(ctrl);
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nvme_put_ctrl(ctrl);
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}
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int nvme_delete_ctrl(struct nvme_ctrl *ctrl)
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{
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if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_DELETING))
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return -EBUSY;
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if (!queue_work(nvme_delete_wq, &ctrl->delete_work))
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return -EBUSY;
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return 0;
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}
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EXPORT_SYMBOL_GPL(nvme_delete_ctrl);
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int nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl)
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{
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int ret = 0;
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/*
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* Keep a reference until the work is flushed since ->delete_ctrl
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* can free the controller.
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*/
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nvme_get_ctrl(ctrl);
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ret = nvme_delete_ctrl(ctrl);
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if (!ret)
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flush_work(&ctrl->delete_work);
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nvme_put_ctrl(ctrl);
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return ret;
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}
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EXPORT_SYMBOL_GPL(nvme_delete_ctrl_sync);
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static inline bool nvme_ns_has_pi(struct nvme_ns *ns)
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{
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return ns->pi_type && ns->ms == sizeof(struct t10_pi_tuple);
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}
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static blk_status_t nvme_error_status(struct request *req)
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{
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switch (nvme_req(req)->status & 0x7ff) {
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case NVME_SC_SUCCESS:
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return BLK_STS_OK;
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case NVME_SC_CAP_EXCEEDED:
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return BLK_STS_NOSPC;
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case NVME_SC_LBA_RANGE:
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return BLK_STS_TARGET;
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case NVME_SC_BAD_ATTRIBUTES:
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case NVME_SC_ONCS_NOT_SUPPORTED:
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case NVME_SC_INVALID_OPCODE:
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case NVME_SC_INVALID_FIELD:
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case NVME_SC_INVALID_NS:
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return BLK_STS_NOTSUPP;
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case NVME_SC_WRITE_FAULT:
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case NVME_SC_READ_ERROR:
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case NVME_SC_UNWRITTEN_BLOCK:
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case NVME_SC_ACCESS_DENIED:
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case NVME_SC_READ_ONLY:
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case NVME_SC_COMPARE_FAILED:
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return BLK_STS_MEDIUM;
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case NVME_SC_GUARD_CHECK:
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case NVME_SC_APPTAG_CHECK:
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case NVME_SC_REFTAG_CHECK:
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case NVME_SC_INVALID_PI:
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return BLK_STS_PROTECTION;
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case NVME_SC_RESERVATION_CONFLICT:
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return BLK_STS_NEXUS;
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default:
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return BLK_STS_IOERR;
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}
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}
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static inline bool nvme_req_needs_retry(struct request *req)
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{
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if (blk_noretry_request(req))
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return false;
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if (nvme_req(req)->status & NVME_SC_DNR)
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return false;
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if (nvme_req(req)->retries >= nvme_max_retries)
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return false;
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return true;
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}
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void nvme_complete_rq(struct request *req)
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{
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blk_status_t status = nvme_error_status(req);
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trace_nvme_complete_rq(req);
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if (unlikely(status != BLK_STS_OK && nvme_req_needs_retry(req))) {
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if (nvme_req_needs_failover(req, status)) {
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nvme_failover_req(req);
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return;
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}
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if (!blk_queue_dying(req->q)) {
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nvme_req(req)->retries++;
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blk_mq_requeue_request(req, true);
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return;
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}
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}
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blk_mq_end_request(req, status);
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}
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EXPORT_SYMBOL_GPL(nvme_complete_rq);
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void nvme_cancel_request(struct request *req, void *data, bool reserved)
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{
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dev_dbg_ratelimited(((struct nvme_ctrl *) data)->device,
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"Cancelling I/O %d", req->tag);
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nvme_req(req)->status = NVME_SC_ABORT_REQ;
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blk_mq_complete_request(req);
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}
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EXPORT_SYMBOL_GPL(nvme_cancel_request);
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bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
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enum nvme_ctrl_state new_state)
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{
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enum nvme_ctrl_state old_state;
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unsigned long flags;
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bool changed = false;
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spin_lock_irqsave(&ctrl->lock, flags);
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old_state = ctrl->state;
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switch (new_state) {
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case NVME_CTRL_ADMIN_ONLY:
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switch (old_state) {
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case NVME_CTRL_CONNECTING:
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changed = true;
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/* FALLTHRU */
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default:
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break;
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}
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break;
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case NVME_CTRL_LIVE:
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switch (old_state) {
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case NVME_CTRL_NEW:
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case NVME_CTRL_RESETTING:
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case NVME_CTRL_CONNECTING:
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changed = true;
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/* FALLTHRU */
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default:
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break;
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}
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break;
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case NVME_CTRL_RESETTING:
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switch (old_state) {
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case NVME_CTRL_NEW:
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case NVME_CTRL_LIVE:
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case NVME_CTRL_ADMIN_ONLY:
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changed = true;
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/* FALLTHRU */
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default:
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break;
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}
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break;
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case NVME_CTRL_CONNECTING:
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switch (old_state) {
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case NVME_CTRL_NEW:
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case NVME_CTRL_RESETTING:
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changed = true;
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/* FALLTHRU */
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default:
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break;
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}
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break;
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case NVME_CTRL_DELETING:
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switch (old_state) {
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case NVME_CTRL_LIVE:
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case NVME_CTRL_ADMIN_ONLY:
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case NVME_CTRL_RESETTING:
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case NVME_CTRL_CONNECTING:
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changed = true;
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/* FALLTHRU */
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default:
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break;
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}
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break;
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case NVME_CTRL_DEAD:
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switch (old_state) {
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case NVME_CTRL_DELETING:
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changed = true;
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/* FALLTHRU */
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default:
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break;
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}
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break;
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default:
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break;
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}
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if (changed)
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ctrl->state = new_state;
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spin_unlock_irqrestore(&ctrl->lock, flags);
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if (changed && ctrl->state == NVME_CTRL_LIVE)
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nvme_kick_requeue_lists(ctrl);
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return changed;
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}
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EXPORT_SYMBOL_GPL(nvme_change_ctrl_state);
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static void nvme_free_ns_head(struct kref *ref)
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{
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struct nvme_ns_head *head =
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container_of(ref, struct nvme_ns_head, ref);
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nvme_mpath_remove_disk(head);
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ida_simple_remove(&head->subsys->ns_ida, head->instance);
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list_del_init(&head->entry);
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cleanup_srcu_struct_quiesced(&head->srcu);
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nvme_put_subsystem(head->subsys);
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kfree(head);
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}
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static void nvme_put_ns_head(struct nvme_ns_head *head)
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{
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kref_put(&head->ref, nvme_free_ns_head);
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}
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static void nvme_free_ns(struct kref *kref)
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{
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struct nvme_ns *ns = container_of(kref, struct nvme_ns, kref);
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if (ns->ndev)
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nvme_nvm_unregister(ns);
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put_disk(ns->disk);
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nvme_put_ns_head(ns->head);
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nvme_put_ctrl(ns->ctrl);
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kfree(ns);
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}
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static void nvme_put_ns(struct nvme_ns *ns)
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{
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kref_put(&ns->kref, nvme_free_ns);
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}
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static inline void nvme_clear_nvme_request(struct request *req)
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{
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if (!(req->rq_flags & RQF_DONTPREP)) {
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nvme_req(req)->retries = 0;
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nvme_req(req)->flags = 0;
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req->rq_flags |= RQF_DONTPREP;
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}
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}
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struct request *nvme_alloc_request(struct request_queue *q,
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struct nvme_command *cmd, blk_mq_req_flags_t flags, int qid)
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{
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unsigned op = nvme_is_write(cmd) ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN;
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struct request *req;
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if (qid == NVME_QID_ANY) {
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req = blk_mq_alloc_request(q, op, flags);
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} else {
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req = blk_mq_alloc_request_hctx(q, op, flags,
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qid ? qid - 1 : 0);
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}
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if (IS_ERR(req))
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return req;
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req->cmd_flags |= REQ_FAILFAST_DRIVER;
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nvme_clear_nvme_request(req);
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nvme_req(req)->cmd = cmd;
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return req;
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}
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EXPORT_SYMBOL_GPL(nvme_alloc_request);
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static int nvme_toggle_streams(struct nvme_ctrl *ctrl, bool enable)
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{
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struct nvme_command c;
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memset(&c, 0, sizeof(c));
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c.directive.opcode = nvme_admin_directive_send;
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c.directive.nsid = cpu_to_le32(NVME_NSID_ALL);
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c.directive.doper = NVME_DIR_SND_ID_OP_ENABLE;
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c.directive.dtype = NVME_DIR_IDENTIFY;
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c.directive.tdtype = NVME_DIR_STREAMS;
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c.directive.endir = enable ? NVME_DIR_ENDIR : 0;
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return nvme_submit_sync_cmd(ctrl->admin_q, &c, NULL, 0);
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}
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static int nvme_disable_streams(struct nvme_ctrl *ctrl)
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{
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return nvme_toggle_streams(ctrl, false);
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}
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static int nvme_enable_streams(struct nvme_ctrl *ctrl)
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{
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return nvme_toggle_streams(ctrl, true);
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}
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static int nvme_get_stream_params(struct nvme_ctrl *ctrl,
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struct streams_directive_params *s, u32 nsid)
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{
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struct nvme_command c;
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memset(&c, 0, sizeof(c));
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memset(s, 0, sizeof(*s));
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c.directive.opcode = nvme_admin_directive_recv;
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c.directive.nsid = cpu_to_le32(nsid);
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c.directive.numd = cpu_to_le32((sizeof(*s) >> 2) - 1);
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c.directive.doper = NVME_DIR_RCV_ST_OP_PARAM;
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c.directive.dtype = NVME_DIR_STREAMS;
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return nvme_submit_sync_cmd(ctrl->admin_q, &c, s, sizeof(*s));
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}
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static int nvme_configure_directives(struct nvme_ctrl *ctrl)
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{
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struct streams_directive_params s;
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int ret;
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if (!(ctrl->oacs & NVME_CTRL_OACS_DIRECTIVES))
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return 0;
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if (!streams)
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return 0;
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ret = nvme_enable_streams(ctrl);
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if (ret)
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return ret;
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ret = nvme_get_stream_params(ctrl, &s, NVME_NSID_ALL);
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if (ret)
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return ret;
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ctrl->nssa = le16_to_cpu(s.nssa);
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if (ctrl->nssa < BLK_MAX_WRITE_HINTS - 1) {
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dev_info(ctrl->device, "too few streams (%u) available\n",
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ctrl->nssa);
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nvme_disable_streams(ctrl);
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return 0;
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}
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ctrl->nr_streams = min_t(unsigned, ctrl->nssa, BLK_MAX_WRITE_HINTS - 1);
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dev_info(ctrl->device, "Using %u streams\n", ctrl->nr_streams);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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 inline void nvme_setup_flush(struct nvme_ns *ns,
|
|
struct nvme_command *cmnd)
|
|
{
|
|
memset(cmnd, 0, sizeof(*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;
|
|
|
|
range = kmalloc_array(segments, sizeof(*range), GFP_ATOMIC);
|
|
if (!range)
|
|
return BLK_STS_RESOURCE;
|
|
|
|
__rq_for_each_bio(bio, req) {
|
|
u64 slba = nvme_block_nr(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)) {
|
|
kfree(range);
|
|
return BLK_STS_IOERR;
|
|
}
|
|
|
|
memset(cmnd, 0, sizeof(*cmnd));
|
|
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 = sizeof(*range) * segments;
|
|
req->rq_flags |= RQF_SPECIAL_PAYLOAD;
|
|
|
|
return BLK_STS_OK;
|
|
}
|
|
|
|
static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
|
|
struct request *req, struct nvme_command *cmnd)
|
|
{
|
|
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;
|
|
|
|
memset(cmnd, 0, sizeof(*cmnd));
|
|
cmnd->rw.opcode = (rq_data_dir(req) ? nvme_cmd_write : nvme_cmd_read);
|
|
cmnd->rw.nsid = cpu_to_le32(ns->head->ns_id);
|
|
cmnd->rw.slba = cpu_to_le64(nvme_block_nr(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;
|
|
cmnd->rw.reftag = cpu_to_le32(
|
|
nvme_block_nr(ns, blk_rq_pos(req)));
|
|
break;
|
|
}
|
|
}
|
|
|
|
cmnd->rw.control = cpu_to_le16(control);
|
|
cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt);
|
|
return 0;
|
|
}
|
|
|
|
blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
|
|
struct nvme_command *cmd)
|
|
{
|
|
blk_status_t ret = BLK_STS_OK;
|
|
|
|
nvme_clear_nvme_request(req);
|
|
|
|
switch (req_op(req)) {
|
|
case REQ_OP_DRV_IN:
|
|
case REQ_OP_DRV_OUT:
|
|
memcpy(cmd, nvme_req(req)->cmd, sizeof(*cmd));
|
|
break;
|
|
case REQ_OP_FLUSH:
|
|
nvme_setup_flush(ns, cmd);
|
|
break;
|
|
case REQ_OP_WRITE_ZEROES:
|
|
/* currently only aliased to deallocate for a few ctrls: */
|
|
case REQ_OP_DISCARD:
|
|
ret = nvme_setup_discard(ns, req, cmd);
|
|
break;
|
|
case REQ_OP_READ:
|
|
case REQ_OP_WRITE:
|
|
ret = nvme_setup_rw(ns, req, cmd);
|
|
break;
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
return BLK_STS_IOERR;
|
|
}
|
|
|
|
cmd->common.command_id = req->tag;
|
|
if (ns)
|
|
trace_nvme_setup_nvm_cmd(req->q->id, cmd);
|
|
else
|
|
trace_nvme_setup_admin_cmd(cmd);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nvme_setup_cmd);
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
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 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, u32 *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;
|
|
}
|
|
}
|
|
|
|
blk_execute_rq(req->q, disk, req, 0);
|
|
if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
|
|
ret = -EINTR;
|
|
else
|
|
ret = nvme_req(req)->status;
|
|
if (result)
|
|
*result = le32_to_cpu(nvme_req(req)->result.u32);
|
|
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;
|
|
|
|
blk_mq_free_request(rq);
|
|
|
|
if (status) {
|
|
dev_err(ctrl->device,
|
|
"failed nvme_keep_alive_end_io error=%d\n",
|
|
status);
|
|
return;
|
|
}
|
|
|
|
schedule_delayed_work(&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);
|
|
|
|
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;
|
|
|
|
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;
|
|
schedule_delayed_work(&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);
|
|
|
|
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 int nvme_identify_ns_descs(struct nvme_ctrl *ctrl, unsigned nsid,
|
|
struct nvme_ns_ids *ids)
|
|
{
|
|
struct nvme_command c = { };
|
|
int status;
|
|
void *data;
|
|
int pos;
|
|
int len;
|
|
|
|
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)
|
|
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;
|
|
|
|
switch (cur->nidt) {
|
|
case NVME_NIDT_EUI64:
|
|
if (cur->nidl != NVME_NIDT_EUI64_LEN) {
|
|
dev_warn(ctrl->device,
|
|
"ctrl returned bogus length: %d for NVME_NIDT_EUI64\n",
|
|
cur->nidl);
|
|
goto free_data;
|
|
}
|
|
len = NVME_NIDT_EUI64_LEN;
|
|
memcpy(ids->eui64, data + pos + sizeof(*cur), len);
|
|
break;
|
|
case NVME_NIDT_NGUID:
|
|
if (cur->nidl != NVME_NIDT_NGUID_LEN) {
|
|
dev_warn(ctrl->device,
|
|
"ctrl returned bogus length: %d for NVME_NIDT_NGUID\n",
|
|
cur->nidl);
|
|
goto free_data;
|
|
}
|
|
len = NVME_NIDT_NGUID_LEN;
|
|
memcpy(ids->nguid, data + pos + sizeof(*cur), len);
|
|
break;
|
|
case NVME_NIDT_UUID:
|
|
if (cur->nidl != NVME_NIDT_UUID_LEN) {
|
|
dev_warn(ctrl->device,
|
|
"ctrl returned bogus length: %d for NVME_NIDT_UUID\n",
|
|
cur->nidl);
|
|
goto free_data;
|
|
}
|
|
len = NVME_NIDT_UUID_LEN;
|
|
uuid_copy(&ids->uuid, data + pos + sizeof(*cur));
|
|
break;
|
|
default:
|
|
/* Skip unnkown types */
|
|
len = cur->nidl;
|
|
break;
|
|
}
|
|
|
|
len += sizeof(*cur);
|
|
}
|
|
free_data:
|
|
kfree(data);
|
|
return status;
|
|
}
|
|
|
|
static int nvme_identify_ns_list(struct nvme_ctrl *dev, unsigned nsid, __le32 *ns_list)
|
|
{
|
|
struct nvme_command c = { };
|
|
|
|
c.identify.opcode = nvme_admin_identify;
|
|
c.identify.cns = NVME_ID_CNS_NS_ACTIVE_LIST;
|
|
c.identify.nsid = cpu_to_le32(nsid);
|
|
return nvme_submit_sync_cmd(dev->admin_q, &c, ns_list,
|
|
NVME_IDENTIFY_DATA_SIZE);
|
|
}
|
|
|
|
static struct nvme_id_ns *nvme_identify_ns(struct nvme_ctrl *ctrl,
|
|
unsigned nsid)
|
|
{
|
|
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 NULL;
|
|
|
|
error = nvme_submit_sync_cmd(ctrl->admin_q, &c, id, sizeof(*id));
|
|
if (error) {
|
|
dev_warn(ctrl->device, "Identify namespace failed\n");
|
|
kfree(id);
|
|
return NULL;
|
|
}
|
|
|
|
return id;
|
|
}
|
|
|
|
static int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11,
|
|
void *buffer, size_t buflen, u32 *result)
|
|
{
|
|
struct nvme_command c;
|
|
union nvme_result res;
|
|
int ret;
|
|
|
|
memset(&c, 0, sizeof(c));
|
|
c.features.opcode = nvme_admin_set_features;
|
|
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);
|
|
if (ret >= 0 && result)
|
|
*result = le32_to_cpu(res.u32);
|
|
return ret;
|
|
}
|
|
|
|
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)
|
|
|
|
static void nvme_enable_aen(struct nvme_ctrl *ctrl)
|
|
{
|
|
u32 result;
|
|
int status;
|
|
|
|
status = nvme_set_features(ctrl, NVME_FEAT_ASYNC_EVENT,
|
|
ctrl->oaes & NVME_AEN_SUPPORTED, NULL, 0, &result);
|
|
if (status)
|
|
dev_warn(ctrl->device, "Failed to configure AEN (cfg %x)\n",
|
|
ctrl->oaes & NVME_AEN_SUPPORTED);
|
|
}
|
|
|
|
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;
|
|
meta_len = (io.nblocks + 1) * ns->ms;
|
|
metadata = (void __user *)(uintptr_t)io.metadata;
|
|
|
|
if (ns->ext) {
|
|
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,
|
|
(void __user *)(uintptr_t)io.addr, length,
|
|
metadata, meta_len, io.slba, NULL, 0);
|
|
}
|
|
|
|
static u32 nvme_known_admin_effects(u8 opcode)
|
|
{
|
|
switch (opcode) {
|
|
case nvme_admin_format_nvm:
|
|
return NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC |
|
|
NVME_CMD_EFFECTS_CSE_MASK;
|
|
case nvme_admin_sanitize_nvm:
|
|
return NVME_CMD_EFFECTS_CSE_MASK;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
|
|
u8 opcode)
|
|
{
|
|
u32 effects = 0;
|
|
|
|
if (ns) {
|
|
if (ctrl->effects)
|
|
effects = le32_to_cpu(ctrl->effects->iocs[opcode]);
|
|
if (effects & ~NVME_CMD_EFFECTS_CSUPP)
|
|
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]);
|
|
else
|
|
effects = nvme_known_admin_effects(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_LBCC | NVME_CMD_EFFECTS_CSE_MASK)) {
|
|
nvme_start_freeze(ctrl);
|
|
nvme_wait_freeze(ctrl);
|
|
}
|
|
return effects;
|
|
}
|
|
|
|
static void nvme_update_formats(struct nvme_ctrl *ctrl)
|
|
{
|
|
struct nvme_ns *ns, *next;
|
|
LIST_HEAD(rm_list);
|
|
|
|
down_write(&ctrl->namespaces_rwsem);
|
|
list_for_each_entry(ns, &ctrl->namespaces, list) {
|
|
if (ns->disk && nvme_revalidate_disk(ns->disk)) {
|
|
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 void nvme_passthru_end(struct nvme_ctrl *ctrl, u32 effects)
|
|
{
|
|
/*
|
|
* Revalidate LBA changes prior to unfreezing. This is necessary to
|
|
* prevent memory corruption if a logical block size was changed by
|
|
* this command.
|
|
*/
|
|
if (effects & NVME_CMD_EFFECTS_LBCC)
|
|
nvme_update_formats(ctrl);
|
|
if (effects & (NVME_CMD_EFFECTS_LBCC | NVME_CMD_EFFECTS_CSE_MASK))
|
|
nvme_unfreeze(ctrl);
|
|
if (effects & NVME_CMD_EFFECTS_CCC)
|
|
nvme_init_identify(ctrl);
|
|
if (effects & (NVME_CMD_EFFECTS_NIC | NVME_CMD_EFFECTS_NCC))
|
|
nvme_queue_scan(ctrl);
|
|
}
|
|
|
|
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;
|
|
u32 effects;
|
|
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[0] = cpu_to_le32(cmd.cdw10);
|
|
c.common.cdw10[1] = cpu_to_le32(cmd.cdw11);
|
|
c.common.cdw10[2] = cpu_to_le32(cmd.cdw12);
|
|
c.common.cdw10[3] = cpu_to_le32(cmd.cdw13);
|
|
c.common.cdw10[4] = cpu_to_le32(cmd.cdw14);
|
|
c.common.cdw10[5] = cpu_to_le32(cmd.cdw15);
|
|
|
|
if (cmd.timeout_ms)
|
|
timeout = msecs_to_jiffies(cmd.timeout_ms);
|
|
|
|
effects = nvme_passthru_start(ctrl, ns, cmd.opcode);
|
|
status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
|
|
(void __user *)(uintptr_t)cmd.addr, cmd.data_len,
|
|
(void __user *)(uintptr_t)cmd.metadata, cmd.metadata,
|
|
0, &cmd.result, timeout);
|
|
nvme_passthru_end(ctrl, effects);
|
|
|
|
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.
|
|
*/
|
|
static 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) {
|
|
*head = disk->private_data;
|
|
*srcu_idx = srcu_read_lock(&(*head)->srcu);
|
|
return nvme_find_path(*head);
|
|
}
|
|
#endif
|
|
*head = NULL;
|
|
*srcu_idx = -1;
|
|
return disk->private_data;
|
|
}
|
|
|
|
static void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx)
|
|
{
|
|
if (head)
|
|
srcu_read_unlock(&head->srcu, idx);
|
|
}
|
|
|
|
static int nvme_ns_ioctl(struct nvme_ns *ns, unsigned cmd, unsigned long arg)
|
|
{
|
|
switch (cmd) {
|
|
case NVME_IOCTL_ID:
|
|
force_successful_syscall_return();
|
|
return ns->head->ns_id;
|
|
case NVME_IOCTL_ADMIN_CMD:
|
|
return nvme_user_cmd(ns->ctrl, NULL, (void __user *)arg);
|
|
case NVME_IOCTL_IO_CMD:
|
|
return nvme_user_cmd(ns->ctrl, ns, (void __user *)arg);
|
|
case NVME_IOCTL_SUBMIT_IO:
|
|
return nvme_submit_io(ns, (void __user *)arg);
|
|
default:
|
|
#ifdef CONFIG_NVM
|
|
if (ns->ndev)
|
|
return nvme_nvm_ioctl(ns, cmd, arg);
|
|
#endif
|
|
if (is_sed_ioctl(cmd))
|
|
return sed_ioctl(ns->ctrl->opal_dev, cmd,
|
|
(void __user *) arg);
|
|
return -ENOTTY;
|
|
}
|
|
}
|
|
|
|
static int nvme_ioctl(struct block_device *bdev, fmode_t mode,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct nvme_ns_head *head = NULL;
|
|
struct nvme_ns *ns;
|
|
int srcu_idx, ret;
|
|
|
|
ns = nvme_get_ns_from_disk(bdev->bd_disk, &head, &srcu_idx);
|
|
if (unlikely(!ns))
|
|
ret = -EWOULDBLOCK;
|
|
else
|
|
ret = nvme_ns_ioctl(ns, cmd, arg);
|
|
nvme_put_ns_from_disk(head, srcu_idx);
|
|
return ret;
|
|
}
|
|
|
|
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)
|
|
{
|
|
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, 1);
|
|
}
|
|
#else
|
|
static void nvme_init_integrity(struct gendisk *disk, u16 ms, u8 pi_type)
|
|
{
|
|
}
|
|
#endif /* CONFIG_BLK_DEV_INTEGRITY */
|
|
|
|
static void nvme_set_chunk_size(struct nvme_ns *ns)
|
|
{
|
|
u32 chunk_size = (((u32)ns->noiob) << (ns->lba_shift - 9));
|
|
blk_queue_chunk_sectors(ns->queue, rounddown_pow_of_two(chunk_size));
|
|
}
|
|
|
|
static void nvme_config_discard(struct nvme_ns *ns)
|
|
{
|
|
struct nvme_ctrl *ctrl = ns->ctrl;
|
|
struct request_queue *queue = ns->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);
|
|
}
|
|
|
|
static void nvme_report_ns_ids(struct nvme_ctrl *ctrl, unsigned int nsid,
|
|
struct nvme_id_ns *id, struct nvme_ns_ids *ids)
|
|
{
|
|
memset(ids, 0, sizeof(*ids));
|
|
|
|
if (ctrl->vs >= NVME_VS(1, 1, 0))
|
|
memcpy(ids->eui64, id->eui64, sizeof(id->eui64));
|
|
if (ctrl->vs >= NVME_VS(1, 2, 0))
|
|
memcpy(ids->nguid, id->nguid, sizeof(id->nguid));
|
|
if (ctrl->vs >= NVME_VS(1, 3, 0)) {
|
|
/* Don't treat error as fatal we potentially
|
|
* already have a NGUID or EUI-64
|
|
*/
|
|
if (nvme_identify_ns_descs(ctrl, nsid, ids))
|
|
dev_warn(ctrl->device,
|
|
"%s: Identify Descriptors failed\n", __func__);
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static void nvme_update_disk_info(struct gendisk *disk,
|
|
struct nvme_ns *ns, struct nvme_id_ns *id)
|
|
{
|
|
sector_t capacity = le64_to_cpup(&id->nsze) << (ns->lba_shift - 9);
|
|
unsigned short bs = 1 << ns->lba_shift;
|
|
|
|
blk_mq_freeze_queue(disk->queue);
|
|
blk_integrity_unregister(disk);
|
|
|
|
blk_queue_logical_block_size(disk->queue, bs);
|
|
blk_queue_physical_block_size(disk->queue, bs);
|
|
blk_queue_io_min(disk->queue, bs);
|
|
|
|
if (ns->ms && !ns->ext &&
|
|
(ns->ctrl->ops->flags & NVME_F_METADATA_SUPPORTED))
|
|
nvme_init_integrity(disk, ns->ms, ns->pi_type);
|
|
if (ns->ms && !nvme_ns_has_pi(ns) && !blk_get_integrity(disk))
|
|
capacity = 0;
|
|
|
|
set_capacity(disk, capacity);
|
|
nvme_config_discard(ns);
|
|
blk_mq_unfreeze_queue(disk->queue);
|
|
}
|
|
|
|
static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
|
|
{
|
|
struct nvme_ns *ns = disk->private_data;
|
|
|
|
/*
|
|
* If identify namespace failed, use default 512 byte block size so
|
|
* block layer can use before failing read/write for 0 capacity.
|
|
*/
|
|
ns->lba_shift = id->lbaf[id->flbas & NVME_NS_FLBAS_LBA_MASK].ds;
|
|
if (ns->lba_shift == 0)
|
|
ns->lba_shift = 9;
|
|
ns->noiob = le16_to_cpu(id->noiob);
|
|
ns->ms = le16_to_cpu(id->lbaf[id->flbas & NVME_NS_FLBAS_LBA_MASK].ms);
|
|
ns->ext = ns->ms && (id->flbas & NVME_NS_FLBAS_META_EXT);
|
|
/* the PI implementation requires metadata equal t10 pi tuple size */
|
|
if (ns->ms == sizeof(struct t10_pi_tuple))
|
|
ns->pi_type = id->dps & NVME_NS_DPS_PI_MASK;
|
|
else
|
|
ns->pi_type = 0;
|
|
|
|
if (ns->noiob)
|
|
nvme_set_chunk_size(ns);
|
|
nvme_update_disk_info(disk, ns, id);
|
|
if (ns->ndev)
|
|
nvme_nvm_update_nvm_info(ns);
|
|
#ifdef CONFIG_NVME_MULTIPATH
|
|
if (ns->head->disk)
|
|
nvme_update_disk_info(ns->head->disk, ns, id);
|
|
#endif
|
|
}
|
|
|
|
static int nvme_revalidate_disk(struct gendisk *disk)
|
|
{
|
|
struct nvme_ns *ns = disk->private_data;
|
|
struct nvme_ctrl *ctrl = ns->ctrl;
|
|
struct nvme_id_ns *id;
|
|
struct nvme_ns_ids ids;
|
|
int ret = 0;
|
|
|
|
if (test_bit(NVME_NS_DEAD, &ns->flags)) {
|
|
set_capacity(disk, 0);
|
|
return -ENODEV;
|
|
}
|
|
|
|
id = nvme_identify_ns(ctrl, ns->head->ns_id);
|
|
if (!id)
|
|
return -ENODEV;
|
|
|
|
if (id->ncap == 0) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
__nvme_revalidate_disk(disk, id);
|
|
nvme_report_ns_ids(ctrl, ns->head->ns_id, id, &ids);
|
|
if (!nvme_ns_ids_equal(&ns->head->ids, &ids)) {
|
|
dev_err(ctrl->device,
|
|
"identifiers changed for nsid %d\n", ns->head->ns_id);
|
|
ret = -ENODEV;
|
|
}
|
|
|
|
out:
|
|
kfree(id);
|
|
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[0] = 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[0] = cpu_to_le32(((u32)secp) << 24 | ((u32)spsp) << 8);
|
|
cmd.common.cdw10[1] = cpu_to_le32(len);
|
|
|
|
return __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, NULL, buffer, len,
|
|
ADMIN_TIMEOUT, NVME_QID_ANY, 1, 0);
|
|
}
|
|
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_ioctl,
|
|
.open = nvme_open,
|
|
.release = nvme_release,
|
|
.getgeo = nvme_getgeo,
|
|
.revalidate_disk= nvme_revalidate_disk,
|
|
.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,
|
|
.open = nvme_ns_head_open,
|
|
.release = nvme_ns_head_release,
|
|
.ioctl = nvme_ioctl,
|
|
.compat_ioctl = nvme_ioctl,
|
|
.getgeo = nvme_getgeo,
|
|
.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;
|
|
|
|
msleep(100);
|
|
if (fatal_signal_pending(current))
|
|
return -EINTR;
|
|
if (time_after(jiffies, timeout)) {
|
|
dev_err(ctrl->device,
|
|
"Device not ready; aborting %s\n", enabled ?
|
|
"initialisation" : "reset");
|
|
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, u64 cap)
|
|
{
|
|
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, cap, false);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nvme_disable_ctrl);
|
|
|
|
int nvme_enable_ctrl(struct nvme_ctrl *ctrl, u64 cap)
|
|
{
|
|
/*
|
|
* Default to a 4K page size, with the intention to update this
|
|
* path in the future to accomodate architectures with differing
|
|
* kernel and IO page sizes.
|
|
*/
|
|
unsigned dev_page_min = NVME_CAP_MPSMIN(cap) + 12, page_shift = 12;
|
|
int ret;
|
|
|
|
if (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 << page_shift);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ctrl->page_size = 1 << page_shift;
|
|
|
|
ctrl->ctrl_config = NVME_CC_CSS_NVM;
|
|
ctrl->ctrl_config |= (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, 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 void nvme_set_queue_limits(struct nvme_ctrl *ctrl,
|
|
struct request_queue *q)
|
|
{
|
|
bool vwc = false;
|
|
|
|
if (ctrl->max_hw_sectors) {
|
|
u32 max_segments =
|
|
(ctrl->max_hw_sectors / (ctrl->page_size >> 9)) + 1;
|
|
|
|
blk_queue_max_hw_sectors(q, ctrl->max_hw_sectors);
|
|
blk_queue_max_segments(q, min_t(u32, max_segments, USHRT_MAX));
|
|
}
|
|
if ((ctrl->quirks & NVME_QUIRK_STRIPE_SIZE) &&
|
|
is_power_of_2(ctrl->max_hw_sectors))
|
|
blk_queue_chunk_sectors(q, ctrl->max_hw_sectors);
|
|
blk_queue_virt_boundary(q, ctrl->page_size - 1);
|
|
if (ctrl->vwc & NVME_CTRL_VWC_PRESENT)
|
|
vwc = true;
|
|
blk_queue_write_cache(q, vwc, vwc);
|
|
}
|
|
|
|
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_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;
|
|
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,
|
|
}
|
|
};
|
|
|
|
/* 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;
|
|
|
|
nqnlen = strnlen(id->subnqn, NVMF_NQN_SIZE);
|
|
if (nqnlen > 0 && nqnlen < NVMF_NQN_SIZE) {
|
|
strncpy(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:%4x%4x",
|
|
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 nvme_subsystem *subsys)
|
|
{
|
|
ida_simple_remove(&nvme_subsystems_ida, subsys->instance);
|
|
kfree(subsys);
|
|
}
|
|
|
|
static void nvme_release_subsystem(struct device *dev)
|
|
{
|
|
__nvme_release_subsystem(container_of(dev, struct nvme_subsystem, dev));
|
|
}
|
|
|
|
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);
|
|
|
|
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,
|
|
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 int nvme_active_ctrls(struct nvme_subsystem *subsys)
|
|
{
|
|
int count = 0;
|
|
struct nvme_ctrl *ctrl;
|
|
|
|
mutex_lock(&subsys->lock);
|
|
list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) {
|
|
if (ctrl->state != NVME_CTRL_DELETING &&
|
|
ctrl->state != NVME_CTRL_DEAD)
|
|
count++;
|
|
}
|
|
mutex_unlock(&subsys->lock);
|
|
|
|
return count;
|
|
}
|
|
|
|
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;
|
|
ret = ida_simple_get(&nvme_subsystems_ida, 0, 0, GFP_KERNEL);
|
|
if (ret < 0) {
|
|
kfree(subsys);
|
|
return ret;
|
|
}
|
|
subsys->instance = ret;
|
|
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->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", subsys->instance);
|
|
device_initialize(&subsys->dev);
|
|
|
|
mutex_lock(&nvme_subsystems_lock);
|
|
found = __nvme_find_get_subsystem(subsys->subnqn);
|
|
if (found) {
|
|
/*
|
|
* Verify that the subsystem actually supports multiple
|
|
* controllers, else bail out.
|
|
*/
|
|
if (!(ctrl->opts && ctrl->opts->discovery_nqn) &&
|
|
nvme_active_ctrls(found) && !(id->cmic & (1 << 1))) {
|
|
dev_err(ctrl->device,
|
|
"ignoring ctrl due to duplicate subnqn (%s).\n",
|
|
found->subnqn);
|
|
nvme_put_subsystem(found);
|
|
ret = -EINVAL;
|
|
goto out_unlock;
|
|
}
|
|
|
|
__nvme_release_subsystem(subsys);
|
|
subsys = found;
|
|
} else {
|
|
ret = device_add(&subsys->dev);
|
|
if (ret) {
|
|
dev_err(ctrl->device,
|
|
"failed to register subsystem device.\n");
|
|
goto out_unlock;
|
|
}
|
|
ida_init(&subsys->ns_ida);
|
|
list_add_tail(&subsys->entry, &nvme_subsystems);
|
|
}
|
|
|
|
ctrl->subsys = subsys;
|
|
mutex_unlock(&nvme_subsystems_lock);
|
|
|
|
if (sysfs_create_link(&subsys->dev.kobj, &ctrl->device->kobj,
|
|
dev_name(ctrl->device))) {
|
|
dev_err(ctrl->device,
|
|
"failed to create sysfs link from subsystem.\n");
|
|
/* the transport driver will eventually put the subsystem */
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&subsys->lock);
|
|
list_add_tail(&ctrl->subsys_entry, &subsys->ctrls);
|
|
mutex_unlock(&subsys->lock);
|
|
|
|
return 0;
|
|
|
|
out_unlock:
|
|
mutex_unlock(&nvme_subsystems_lock);
|
|
put_device(&subsys->dev);
|
|
return ret;
|
|
}
|
|
|
|
int nvme_get_log_ext(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
|
|
u8 log_page, void *log,
|
|
size_t size, u64 offset)
|
|
{
|
|
struct nvme_command c = { };
|
|
unsigned long dwlen = size / 4 - 1;
|
|
|
|
c.get_log_page.opcode = nvme_admin_get_log_page;
|
|
|
|
if (ns)
|
|
c.get_log_page.nsid = cpu_to_le32(ns->head->ns_id);
|
|
else
|
|
c.get_log_page.nsid = cpu_to_le32(NVME_NSID_ALL);
|
|
|
|
c.get_log_page.lid = log_page;
|
|
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));
|
|
|
|
return nvme_submit_sync_cmd(ctrl->admin_q, &c, log, size);
|
|
}
|
|
|
|
static int nvme_get_log(struct nvme_ctrl *ctrl, u8 log_page, void *log,
|
|
size_t size)
|
|
{
|
|
return nvme_get_log_ext(ctrl, NULL, log_page, log, size, 0);
|
|
}
|
|
|
|
static int nvme_get_effects_log(struct nvme_ctrl *ctrl)
|
|
{
|
|
int ret;
|
|
|
|
if (!ctrl->effects)
|
|
ctrl->effects = kzalloc(sizeof(*ctrl->effects), GFP_KERNEL);
|
|
|
|
if (!ctrl->effects)
|
|
return 0;
|
|
|
|
ret = nvme_get_log(ctrl, NVME_LOG_CMD_EFFECTS, ctrl->effects,
|
|
sizeof(*ctrl->effects));
|
|
if (ret) {
|
|
kfree(ctrl->effects);
|
|
ctrl->effects = NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
u64 cap;
|
|
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;
|
|
}
|
|
|
|
ret = ctrl->ops->reg_read64(ctrl, NVME_REG_CAP, &cap);
|
|
if (ret) {
|
|
dev_err(ctrl->device, "Reading CAP failed (%d)\n", ret);
|
|
return ret;
|
|
}
|
|
page_shift = NVME_CAP_MPSMIN(cap) + 12;
|
|
|
|
if (ctrl->vs >= NVME_VS(1, 1, 0))
|
|
ctrl->subsystem = NVME_CAP_NSSRC(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);
|
|
if (ret < 0)
|
|
goto out_free;
|
|
}
|
|
|
|
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->oacs = le16_to_cpu(id->oacs);
|
|
ctrl->oncs = le16_to_cpup(&id->oncs);
|
|
ctrl->oaes = le32_to_cpu(id->oaes);
|
|
atomic_set(&ctrl->abort_limit, id->acl + 1);
|
|
ctrl->vwc = id->vwc;
|
|
ctrl->cntlid = le16_to_cpup(&id->cntlid);
|
|
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);
|
|
|
|
if (id->rtd3e) {
|
|
/* us -> s */
|
|
u32 transition_time = le32_to_cpu(id->rtd3e) / 1000000;
|
|
|
|
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)) {
|
|
ret = -EINVAL;
|
|
goto out_free;
|
|
}
|
|
|
|
if (!ctrl->opts->discovery_nqn && !ctrl->kas) {
|
|
dev_err(ctrl->device,
|
|
"keep-alive support is mandatory for fabrics\n");
|
|
ret = -EINVAL;
|
|
goto out_free;
|
|
}
|
|
} else {
|
|
ctrl->cntlid = le16_to_cpu(id->cntlid);
|
|
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);
|
|
}
|
|
|
|
kfree(id);
|
|
|
|
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;
|
|
|
|
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:
|
|
case NVME_CTRL_ADMIN_ONLY:
|
|
break;
|
|
default:
|
|
return -EWOULDBLOCK;
|
|
}
|
|
|
|
file->private_data = 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_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,
|
|
.unlocked_ioctl = nvme_dev_ioctl,
|
|
.compat_ioctl = nvme_dev_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,
|
|
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;
|
|
}
|
|
return a->mode;
|
|
}
|
|
|
|
const struct attribute_group nvme_ns_id_attr_group = {
|
|
.attrs = nvme_ns_id_attrs,
|
|
.is_visible = nvme_ns_id_attrs_are_visible,
|
|
};
|
|
|
|
#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);
|
|
|
|
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_ADMIN_ONLY] = "only-admin",
|
|
[NVME_CTRL_RESETTING] = "resetting",
|
|
[NVME_CTRL_CONNECTING] = "connecting",
|
|
[NVME_CTRL_DELETING] = "deleting",
|
|
[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_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 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,
|
|
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;
|
|
|
|
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_check_ids(struct nvme_subsystem *subsys,
|
|
struct nvme_ns_head *new)
|
|
{
|
|
struct nvme_ns_head *h;
|
|
|
|
lockdep_assert_held(&subsys->lock);
|
|
|
|
list_for_each_entry(h, &subsys->nsheads, entry) {
|
|
if (nvme_ns_ids_valid(&new->ids) &&
|
|
!list_empty(&h->list) &&
|
|
nvme_ns_ids_equal(&new->ids, &h->ids))
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct nvme_ns_head *nvme_alloc_ns_head(struct nvme_ctrl *ctrl,
|
|
unsigned nsid, struct nvme_id_ns *id)
|
|
{
|
|
struct nvme_ns_head *head;
|
|
int ret = -ENOMEM;
|
|
|
|
head = kzalloc(sizeof(*head), 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;
|
|
kref_init(&head->ref);
|
|
|
|
nvme_report_ns_ids(ctrl, nsid, id, &head->ids);
|
|
|
|
ret = __nvme_check_ids(ctrl->subsys, head);
|
|
if (ret) {
|
|
dev_err(ctrl->device,
|
|
"duplicate IDs for nsid %d\n", nsid);
|
|
goto out_cleanup_srcu;
|
|
}
|
|
|
|
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:
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static int nvme_init_ns_head(struct nvme_ns *ns, unsigned nsid,
|
|
struct nvme_id_ns *id)
|
|
{
|
|
struct nvme_ctrl *ctrl = ns->ctrl;
|
|
bool is_shared = id->nmic & (1 << 0);
|
|
struct nvme_ns_head *head = NULL;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&ctrl->subsys->lock);
|
|
if (is_shared)
|
|
head = __nvme_find_ns_head(ctrl->subsys, nsid);
|
|
if (!head) {
|
|
head = nvme_alloc_ns_head(ctrl, nsid, id);
|
|
if (IS_ERR(head)) {
|
|
ret = PTR_ERR(head);
|
|
goto out_unlock;
|
|
}
|
|
} else {
|
|
struct nvme_ns_ids ids;
|
|
|
|
nvme_report_ns_ids(ctrl, nsid, id, &ids);
|
|
if (!nvme_ns_ids_equal(&head->ids, &ids)) {
|
|
dev_err(ctrl->device,
|
|
"IDs don't match for shared namespace %d\n",
|
|
nsid);
|
|
ret = -EINVAL;
|
|
goto out_unlock;
|
|
}
|
|
}
|
|
|
|
list_add_tail(&ns->siblings, &head->list);
|
|
ns->head = head;
|
|
|
|
out_unlock:
|
|
mutex_unlock(&ctrl->subsys->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int ns_cmp(void *priv, struct list_head *a, struct list_head *b)
|
|
{
|
|
struct nvme_ns *nsa = container_of(a, struct nvme_ns, list);
|
|
struct nvme_ns *nsb = container_of(b, struct nvme_ns, list);
|
|
|
|
return nsa->head->ns_id - nsb->head->ns_id;
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
static int nvme_setup_streams_ns(struct nvme_ctrl *ctrl, struct nvme_ns *ns)
|
|
{
|
|
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) {
|
|
unsigned int bs = 1 << ns->lba_shift;
|
|
|
|
blk_queue_io_min(ns->queue, bs * ns->sws);
|
|
if (ns->sgs)
|
|
blk_queue_io_opt(ns->queue, bs * ns->sws * ns->sgs);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
|
|
{
|
|
struct nvme_ns *ns;
|
|
struct gendisk *disk;
|
|
struct nvme_id_ns *id;
|
|
char disk_name[DISK_NAME_LEN];
|
|
int node = dev_to_node(ctrl->dev), flags = GENHD_FL_EXT_DEVT;
|
|
|
|
ns = kzalloc_node(sizeof(*ns), GFP_KERNEL, node);
|
|
if (!ns)
|
|
return;
|
|
|
|
ns->queue = blk_mq_init_queue(ctrl->tagset);
|
|
if (IS_ERR(ns->queue))
|
|
goto out_free_ns;
|
|
blk_queue_flag_set(QUEUE_FLAG_NONROT, ns->queue);
|
|
ns->queue->queuedata = ns;
|
|
ns->ctrl = ctrl;
|
|
|
|
kref_init(&ns->kref);
|
|
ns->lba_shift = 9; /* set to a default value for 512 until disk is validated */
|
|
|
|
blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift);
|
|
nvme_set_queue_limits(ctrl, ns->queue);
|
|
|
|
id = nvme_identify_ns(ctrl, nsid);
|
|
if (!id)
|
|
goto out_free_queue;
|
|
|
|
if (id->ncap == 0)
|
|
goto out_free_id;
|
|
|
|
if (nvme_init_ns_head(ns, nsid, id))
|
|
goto out_free_id;
|
|
nvme_setup_streams_ns(ctrl, ns);
|
|
nvme_set_disk_name(disk_name, ns, ctrl, &flags);
|
|
|
|
if ((ctrl->quirks & NVME_QUIRK_LIGHTNVM) && id->vs[0] == 0x1) {
|
|
if (nvme_nvm_register(ns, disk_name, node)) {
|
|
dev_warn(ctrl->device, "LightNVM init failure\n");
|
|
goto out_unlink_ns;
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
__nvme_revalidate_disk(disk, id);
|
|
|
|
down_write(&ctrl->namespaces_rwsem);
|
|
list_add_tail(&ns->list, &ctrl->namespaces);
|
|
up_write(&ctrl->namespaces_rwsem);
|
|
|
|
nvme_get_ctrl(ctrl);
|
|
|
|
kfree(id);
|
|
|
|
device_add_disk(ctrl->device, ns->disk);
|
|
if (sysfs_create_group(&disk_to_dev(ns->disk)->kobj,
|
|
&nvme_ns_id_attr_group))
|
|
pr_warn("%s: failed to create sysfs group for identification\n",
|
|
ns->disk->disk_name);
|
|
if (ns->ndev && nvme_nvm_register_sysfs(ns))
|
|
pr_warn("%s: failed to register lightnvm sysfs group for identification\n",
|
|
ns->disk->disk_name);
|
|
|
|
nvme_mpath_add_disk(ns->head);
|
|
nvme_fault_inject_init(ns);
|
|
return;
|
|
out_unlink_ns:
|
|
mutex_lock(&ctrl->subsys->lock);
|
|
list_del_rcu(&ns->siblings);
|
|
mutex_unlock(&ctrl->subsys->lock);
|
|
out_free_id:
|
|
kfree(id);
|
|
out_free_queue:
|
|
blk_cleanup_queue(ns->queue);
|
|
out_free_ns:
|
|
kfree(ns);
|
|
}
|
|
|
|
static void nvme_ns_remove(struct nvme_ns *ns)
|
|
{
|
|
if (test_and_set_bit(NVME_NS_REMOVING, &ns->flags))
|
|
return;
|
|
|
|
nvme_fault_inject_fini(ns);
|
|
if (ns->disk && ns->disk->flags & GENHD_FL_UP) {
|
|
sysfs_remove_group(&disk_to_dev(ns->disk)->kobj,
|
|
&nvme_ns_id_attr_group);
|
|
if (ns->ndev)
|
|
nvme_nvm_unregister_sysfs(ns);
|
|
del_gendisk(ns->disk);
|
|
blk_cleanup_queue(ns->queue);
|
|
if (blk_get_integrity(ns->disk))
|
|
blk_integrity_unregister(ns->disk);
|
|
}
|
|
|
|
mutex_lock(&ns->ctrl->subsys->lock);
|
|
nvme_mpath_clear_current_path(ns);
|
|
list_del_rcu(&ns->siblings);
|
|
mutex_unlock(&ns->ctrl->subsys->lock);
|
|
|
|
down_write(&ns->ctrl->namespaces_rwsem);
|
|
list_del_init(&ns->list);
|
|
up_write(&ns->ctrl->namespaces_rwsem);
|
|
|
|
synchronize_srcu(&ns->head->srcu);
|
|
nvme_mpath_check_last_path(ns);
|
|
nvme_put_ns(ns);
|
|
}
|
|
|
|
static void nvme_validate_ns(struct nvme_ctrl *ctrl, unsigned nsid)
|
|
{
|
|
struct nvme_ns *ns;
|
|
|
|
ns = nvme_find_get_ns(ctrl, nsid);
|
|
if (ns) {
|
|
if (ns->disk && revalidate_disk(ns->disk))
|
|
nvme_ns_remove(ns);
|
|
nvme_put_ns(ns);
|
|
} else
|
|
nvme_alloc_ns(ctrl, nsid);
|
|
}
|
|
|
|
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)
|
|
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, unsigned nn)
|
|
{
|
|
struct nvme_ns *ns;
|
|
__le32 *ns_list;
|
|
unsigned i, j, nsid, prev = 0, num_lists = DIV_ROUND_UP(nn, 1024);
|
|
int ret = 0;
|
|
|
|
ns_list = kzalloc(NVME_IDENTIFY_DATA_SIZE, GFP_KERNEL);
|
|
if (!ns_list)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < num_lists; i++) {
|
|
ret = nvme_identify_ns_list(ctrl, prev, ns_list);
|
|
if (ret)
|
|
goto free;
|
|
|
|
for (j = 0; j < min(nn, 1024U); j++) {
|
|
nsid = le32_to_cpu(ns_list[j]);
|
|
if (!nsid)
|
|
goto out;
|
|
|
|
nvme_validate_ns(ctrl, nsid);
|
|
|
|
while (++prev < nsid) {
|
|
ns = nvme_find_get_ns(ctrl, prev);
|
|
if (ns) {
|
|
nvme_ns_remove(ns);
|
|
nvme_put_ns(ns);
|
|
}
|
|
}
|
|
}
|
|
nn -= j;
|
|
}
|
|
out:
|
|
nvme_remove_invalid_namespaces(ctrl, prev);
|
|
free:
|
|
kfree(ns_list);
|
|
return ret;
|
|
}
|
|
|
|
static void nvme_scan_ns_sequential(struct nvme_ctrl *ctrl, unsigned nn)
|
|
{
|
|
unsigned i;
|
|
|
|
for (i = 1; i <= nn; i++)
|
|
nvme_validate_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_LOG_CHANGED_NS, log, log_size);
|
|
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);
|
|
struct nvme_id_ctrl *id;
|
|
unsigned nn;
|
|
|
|
if (ctrl->state != NVME_CTRL_LIVE)
|
|
return;
|
|
|
|
WARN_ON_ONCE(!ctrl->tagset);
|
|
|
|
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);
|
|
}
|
|
|
|
if (nvme_identify_ctrl(ctrl, &id))
|
|
return;
|
|
|
|
nn = le32_to_cpu(id->nn);
|
|
if (ctrl->vs >= NVME_VS(1, 1, 0) &&
|
|
!(ctrl->quirks & NVME_QUIRK_IDENTIFY_CNS)) {
|
|
if (!nvme_scan_ns_list(ctrl, nn))
|
|
goto out_free_id;
|
|
}
|
|
nvme_scan_ns_sequential(ctrl, nn);
|
|
out_free_id:
|
|
kfree(id);
|
|
down_write(&ctrl->namespaces_rwsem);
|
|
list_sort(NULL, &ctrl->namespaces, ns_cmp);
|
|
up_write(&ctrl->namespaces_rwsem);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
|
|
/*
|
|
* 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);
|
|
|
|
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 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);
|
|
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_LOG_FW_SLOT, log, sizeof(*log)))
|
|
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_reset_ctrl(ctrl);
|
|
break;
|
|
}
|
|
msleep(100);
|
|
}
|
|
|
|
if (ctrl->state != 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)
|
|
{
|
|
switch ((result & 0xff00) >> 8) {
|
|
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:
|
|
queue_work(nvme_wq, &ctrl->fw_act_work);
|
|
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);
|
|
|
|
if (le16_to_cpu(status) >> 1 != NVME_SC_SUCCESS)
|
|
return;
|
|
|
|
switch (result & 0x7) {
|
|
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:
|
|
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_stop_keep_alive(ctrl);
|
|
flush_work(&ctrl->async_event_work);
|
|
flush_work(&ctrl->scan_work);
|
|
cancel_work_sync(&ctrl->fw_act_work);
|
|
if (ctrl->ops->stop_ctrl)
|
|
ctrl->ops->stop_ctrl(ctrl);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nvme_stop_ctrl);
|
|
|
|
void nvme_start_ctrl(struct nvme_ctrl *ctrl)
|
|
{
|
|
if (ctrl->kato)
|
|
nvme_start_keep_alive(ctrl);
|
|
|
|
if (ctrl->queue_count > 1) {
|
|
nvme_queue_scan(ctrl);
|
|
nvme_enable_aen(ctrl);
|
|
queue_work(nvme_wq, &ctrl->async_event_work);
|
|
nvme_start_queues(ctrl);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(nvme_start_ctrl);
|
|
|
|
void nvme_uninit_ctrl(struct nvme_ctrl *ctrl)
|
|
{
|
|
cdev_device_del(&ctrl->cdev, ctrl->device);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nvme_uninit_ctrl);
|
|
|
|
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;
|
|
|
|
ida_simple_remove(&nvme_instance_ida, ctrl->instance);
|
|
kfree(ctrl->effects);
|
|
|
|
if (subsys) {
|
|
mutex_lock(&subsys->lock);
|
|
list_del(&ctrl->subsys_entry);
|
|
mutex_unlock(&subsys->lock);
|
|
sysfs_remove_link(&subsys->dev.kobj, dev_name(ctrl->device));
|
|
}
|
|
|
|
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);
|
|
INIT_LIST_HEAD(&ctrl->namespaces);
|
|
init_rwsem(&ctrl->namespaces_rwsem);
|
|
ctrl->dev = dev;
|
|
ctrl->ops = ops;
|
|
ctrl->quirks = quirks;
|
|
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);
|
|
|
|
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;
|
|
|
|
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));
|
|
|
|
return 0;
|
|
out_free_name:
|
|
kfree_const(dev->kobj.name);
|
|
out_release_instance:
|
|
ida_simple_remove(&nvme_instance_ida, ctrl->instance);
|
|
out:
|
|
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_mq_unquiesce_queue(ctrl->admin_q);
|
|
|
|
list_for_each_entry(ns, &ctrl->namespaces, list) {
|
|
/*
|
|
* Revalidating a dead namespace sets capacity to 0. This will
|
|
* end buffered writers dirtying pages that can't be synced.
|
|
*/
|
|
if (!ns->disk || test_and_set_bit(NVME_NS_DEAD, &ns->flags))
|
|
continue;
|
|
revalidate_disk(ns->disk);
|
|
blk_set_queue_dying(ns->queue);
|
|
|
|
/* Forcibly unquiesce queues to avoid blocking dispatch */
|
|
blk_mq_unquiesce_queue(ns->queue);
|
|
}
|
|
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);
|
|
|
|
void 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);
|
|
}
|
|
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);
|
|
|
|
int __init nvme_core_init(void)
|
|
{
|
|
int result = -ENOMEM;
|
|
|
|
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_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;
|
|
}
|
|
|
|
void nvme_core_exit(void)
|
|
{
|
|
ida_destroy(&nvme_subsystems_ida);
|
|
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);
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION("1.0");
|
|
module_init(nvme_core_init);
|
|
module_exit(nvme_core_exit);
|