2012-09-17 19:23:01 +00:00
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/*-
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2016-01-28 23:15:14 +00:00
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* Copyright (C) 2012-2016 Intel Corporation
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2012-09-17 19:23:01 +00:00
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bio.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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2016-01-28 23:15:14 +00:00
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#include <sys/sysctl.h>
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2012-09-17 19:23:01 +00:00
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#include <sys/systm.h>
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#include <sys/taskqueue.h>
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#include <geom/geom.h>
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#include <geom/geom_disk.h>
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#include <dev/nvme/nvme.h>
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2013-07-19 21:40:57 +00:00
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#define NVD_STR "nvd"
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2012-09-17 19:23:01 +00:00
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struct nvd_disk;
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static disk_ioctl_t nvd_ioctl;
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static disk_strategy_t nvd_strategy;
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2016-01-07 15:59:51 +00:00
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static void nvd_done(void *arg, const struct nvme_completion *cpl);
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2013-03-26 21:45:37 +00:00
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static void *nvd_new_disk(struct nvme_namespace *ns, void *ctrlr);
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2012-09-17 19:23:01 +00:00
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static void destroy_geom_disk(struct nvd_disk *ndisk);
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2013-03-26 21:45:37 +00:00
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static void *nvd_new_controller(struct nvme_controller *ctrlr);
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2013-03-26 21:58:38 +00:00
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static void nvd_controller_fail(void *ctrlr);
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2013-03-26 21:45:37 +00:00
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2012-09-17 19:23:01 +00:00
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static int nvd_load(void);
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static void nvd_unload(void);
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MALLOC_DEFINE(M_NVD, "nvd", "nvd(4) allocations");
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struct nvme_consumer *consumer_handle;
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struct nvd_disk {
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struct bio_queue_head bioq;
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struct task bioqtask;
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struct mtx bioqlock;
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struct disk *disk;
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struct taskqueue *tq;
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struct nvme_namespace *ns;
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uint32_t cur_depth;
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2016-01-07 16:06:23 +00:00
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uint32_t ordered_in_flight;
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2012-09-17 19:23:01 +00:00
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2013-03-26 21:45:37 +00:00
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TAILQ_ENTRY(nvd_disk) global_tailq;
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TAILQ_ENTRY(nvd_disk) ctrlr_tailq;
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};
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struct nvd_controller {
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TAILQ_ENTRY(nvd_controller) tailq;
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TAILQ_HEAD(, nvd_disk) disk_head;
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2012-09-17 19:23:01 +00:00
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};
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2013-03-26 21:45:37 +00:00
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static TAILQ_HEAD(, nvd_controller) ctrlr_head;
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static TAILQ_HEAD(disk_list, nvd_disk) disk_head;
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2012-09-17 19:23:01 +00:00
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2016-01-28 23:15:14 +00:00
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static SYSCTL_NODE(_hw, OID_AUTO, nvd, CTLFLAG_RD, 0, "nvd driver parameters");
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/*
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* The NVMe specification does not define a maximum or optimal delete size, so
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* technically max delete size is min(full size of the namespace, 2^32 - 1
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* LBAs). A single delete for a multi-TB NVMe namespace though may take much
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* longer to complete than the nvme(4) I/O timeout period. So choose a sensible
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* default here that is still suitably large to minimize the number of overall
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* delete operations.
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*/
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static uint64_t nvd_delete_max = (1024 * 1024 * 1024); /* 1GB */
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SYSCTL_UQUAD(_hw_nvd, OID_AUTO, delete_max, CTLFLAG_RDTUN, &nvd_delete_max, 0,
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"nvd maximum BIO_DELETE size in bytes");
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2012-09-17 19:23:01 +00:00
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static int nvd_modevent(module_t mod, int type, void *arg)
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{
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int error = 0;
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switch (type) {
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case MOD_LOAD:
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error = nvd_load();
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break;
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case MOD_UNLOAD:
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nvd_unload();
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break;
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default:
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break;
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}
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return (error);
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}
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moduledata_t nvd_mod = {
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2013-07-19 21:40:57 +00:00
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NVD_STR,
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2012-09-17 19:23:01 +00:00
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(modeventhand_t)nvd_modevent,
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2012-10-10 08:36:38 +00:00
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0
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2012-09-17 19:23:01 +00:00
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};
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DECLARE_MODULE(nvd, nvd_mod, SI_SUB_DRIVERS, SI_ORDER_ANY);
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MODULE_VERSION(nvd, 1);
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MODULE_DEPEND(nvd, nvme, 1, 1, 1);
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static int
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nvd_load()
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{
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2013-03-26 21:45:37 +00:00
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TAILQ_INIT(&ctrlr_head);
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TAILQ_INIT(&disk_head);
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consumer_handle = nvme_register_consumer(nvd_new_disk,
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2013-03-26 21:58:38 +00:00
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nvd_new_controller, NULL, nvd_controller_fail);
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2012-09-17 19:23:01 +00:00
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return (consumer_handle != NULL ? 0 : -1);
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}
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static void
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nvd_unload()
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{
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2013-03-26 21:45:37 +00:00
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struct nvd_controller *ctrlr;
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struct nvd_disk *disk;
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while (!TAILQ_EMPTY(&ctrlr_head)) {
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ctrlr = TAILQ_FIRST(&ctrlr_head);
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TAILQ_REMOVE(&ctrlr_head, ctrlr, tailq);
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free(ctrlr, M_NVD);
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}
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2012-09-17 19:23:01 +00:00
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2013-03-26 21:45:37 +00:00
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while (!TAILQ_EMPTY(&disk_head)) {
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disk = TAILQ_FIRST(&disk_head);
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TAILQ_REMOVE(&disk_head, disk, global_tailq);
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destroy_geom_disk(disk);
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free(disk, M_NVD);
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2012-09-17 19:23:01 +00:00
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}
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nvme_unregister_consumer(consumer_handle);
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}
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2016-01-07 15:59:51 +00:00
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static int
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nvd_bio_submit(struct nvd_disk *ndisk, struct bio *bp)
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{
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int err;
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bp->bio_driver1 = NULL;
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atomic_add_int(&ndisk->cur_depth, 1);
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err = nvme_ns_bio_process(ndisk->ns, bp, nvd_done);
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if (err) {
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atomic_add_int(&ndisk->cur_depth, -1);
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2016-01-07 16:06:23 +00:00
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if (__predict_false(bp->bio_flags & BIO_ORDERED))
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atomic_add_int(&ndisk->ordered_in_flight, -1);
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2016-01-07 15:59:51 +00:00
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bp->bio_error = err;
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bp->bio_flags |= BIO_ERROR;
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bp->bio_resid = bp->bio_bcount;
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biodone(bp);
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return (-1);
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}
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return (0);
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}
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2012-09-17 19:23:01 +00:00
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static void
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nvd_strategy(struct bio *bp)
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{
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struct nvd_disk *ndisk;
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ndisk = (struct nvd_disk *)bp->bio_disk->d_drv1;
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2016-01-07 16:06:23 +00:00
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if (__predict_false(bp->bio_flags & BIO_ORDERED))
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atomic_add_int(&ndisk->ordered_in_flight, 1);
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if (__predict_true(ndisk->ordered_in_flight == 0)) {
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nvd_bio_submit(ndisk, bp);
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return;
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}
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/*
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* There are ordered bios in flight, so we need to submit
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* bios through the task queue to enforce ordering.
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*/
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2012-09-17 19:23:01 +00:00
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mtx_lock(&ndisk->bioqlock);
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bioq_insert_tail(&ndisk->bioq, bp);
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mtx_unlock(&ndisk->bioqlock);
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taskqueue_enqueue(ndisk->tq, &ndisk->bioqtask);
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}
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static int
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nvd_ioctl(struct disk *ndisk, u_long cmd, void *data, int fflag,
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struct thread *td)
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{
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int ret = 0;
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switch (cmd) {
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default:
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ret = EIO;
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}
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return (ret);
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}
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static void
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2013-03-26 21:00:18 +00:00
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nvd_done(void *arg, const struct nvme_completion *cpl)
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2012-09-17 19:23:01 +00:00
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{
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struct bio *bp;
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struct nvd_disk *ndisk;
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bp = (struct bio *)arg;
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ndisk = bp->bio_disk->d_drv1;
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2012-10-18 00:45:53 +00:00
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atomic_add_int(&ndisk->cur_depth, -1);
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2016-01-07 16:06:23 +00:00
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if (__predict_false(bp->bio_flags & BIO_ORDERED))
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atomic_add_int(&ndisk->ordered_in_flight, -1);
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2012-09-17 19:23:01 +00:00
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biodone(bp);
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}
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static void
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nvd_bioq_process(void *arg, int pending)
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{
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struct nvd_disk *ndisk = arg;
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struct bio *bp;
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for (;;) {
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mtx_lock(&ndisk->bioqlock);
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bp = bioq_takefirst(&ndisk->bioq);
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mtx_unlock(&ndisk->bioqlock);
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if (bp == NULL)
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break;
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2016-01-07 15:59:51 +00:00
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if (nvd_bio_submit(ndisk, bp) != 0) {
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2016-01-07 15:58:44 +00:00
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continue;
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2012-09-17 19:23:01 +00:00
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}
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#ifdef BIO_ORDERED
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/*
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* BIO_ORDERED flag dictates that the bio with BIO_ORDERED
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* flag set must be completed before proceeding with
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* additional bios.
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*/
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if (bp->bio_flags & BIO_ORDERED) {
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while (ndisk->cur_depth > 0) {
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pause("nvd flush", 1);
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}
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}
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#endif
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}
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}
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2013-03-26 18:39:54 +00:00
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static void *
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2013-03-26 21:45:37 +00:00
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nvd_new_controller(struct nvme_controller *ctrlr)
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2012-09-17 19:23:01 +00:00
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{
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2013-03-26 21:45:37 +00:00
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struct nvd_controller *nvd_ctrlr;
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nvd_ctrlr = malloc(sizeof(struct nvd_controller), M_NVD,
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2013-03-26 22:11:34 +00:00
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M_ZERO | M_WAITOK);
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2013-03-26 21:45:37 +00:00
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TAILQ_INIT(&nvd_ctrlr->disk_head);
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TAILQ_INSERT_TAIL(&ctrlr_head, nvd_ctrlr, tailq);
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return (nvd_ctrlr);
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}
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static void *
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nvd_new_disk(struct nvme_namespace *ns, void *ctrlr_arg)
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{
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2013-07-19 21:40:57 +00:00
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uint8_t descr[NVME_MODEL_NUMBER_LENGTH+1];
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2013-03-26 21:45:37 +00:00
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struct nvd_disk *ndisk;
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struct disk *disk;
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struct nvd_controller *ctrlr = ctrlr_arg;
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2012-09-17 19:23:01 +00:00
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2013-03-26 22:11:34 +00:00
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ndisk = malloc(sizeof(struct nvd_disk), M_NVD, M_ZERO | M_WAITOK);
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2012-09-17 19:23:01 +00:00
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disk = disk_alloc();
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disk->d_strategy = nvd_strategy;
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disk->d_ioctl = nvd_ioctl;
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2013-07-19 21:40:57 +00:00
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disk->d_name = NVD_STR;
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2012-09-17 19:23:01 +00:00
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disk->d_drv1 = ndisk;
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disk->d_maxsize = nvme_ns_get_max_io_xfer_size(ns);
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disk->d_sectorsize = nvme_ns_get_sector_size(ns);
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disk->d_mediasize = (off_t)nvme_ns_get_size(ns);
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2015-07-21 20:53:21 +00:00
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disk->d_delmaxsize = (off_t)nvme_ns_get_size(ns);
|
2016-01-28 23:15:14 +00:00
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if (disk->d_delmaxsize > nvd_delete_max)
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disk->d_delmaxsize = nvd_delete_max;
|
2016-03-10 17:13:10 +00:00
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disk->d_stripesize = nvme_ns_get_stripesize(ns);
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2012-09-17 19:23:01 +00:00
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2013-03-26 21:45:37 +00:00
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if (TAILQ_EMPTY(&disk_head))
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2012-09-17 19:23:01 +00:00
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disk->d_unit = 0;
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else
|
2013-03-26 21:45:37 +00:00
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disk->d_unit =
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TAILQ_LAST(&disk_head, disk_list)->disk->d_unit + 1;
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2012-09-17 19:23:01 +00:00
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2016-01-07 15:55:41 +00:00
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disk->d_flags = DISKFLAG_DIRECT_COMPLETION;
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2012-09-17 19:23:01 +00:00
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if (nvme_ns_get_flags(ns) & NVME_NS_DEALLOCATE_SUPPORTED)
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disk->d_flags |= DISKFLAG_CANDELETE;
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if (nvme_ns_get_flags(ns) & NVME_NS_FLUSH_SUPPORTED)
|
|
|
|
disk->d_flags |= DISKFLAG_CANFLUSHCACHE;
|
|
|
|
|
2013-04-01 16:23:34 +00:00
|
|
|
/* ifdef used here to ease porting to stable branches at a later point. */
|
|
|
|
#ifdef DISKFLAG_UNMAPPED_BIO
|
|
|
|
disk->d_flags |= DISKFLAG_UNMAPPED_BIO;
|
|
|
|
#endif
|
|
|
|
|
2013-07-17 23:23:38 +00:00
|
|
|
/*
|
|
|
|
* d_ident and d_descr are both far bigger than the length of either
|
|
|
|
* the serial or model number strings.
|
|
|
|
*/
|
2013-07-19 21:40:57 +00:00
|
|
|
nvme_strvis(disk->d_ident, nvme_ns_get_serial_number(ns),
|
|
|
|
sizeof(disk->d_ident), NVME_SERIAL_NUMBER_LENGTH);
|
|
|
|
|
|
|
|
nvme_strvis(descr, nvme_ns_get_model_number(ns), sizeof(descr),
|
|
|
|
NVME_MODEL_NUMBER_LENGTH);
|
2012-09-17 19:23:01 +00:00
|
|
|
|
|
|
|
#if __FreeBSD_version >= 900034
|
2013-07-19 21:40:57 +00:00
|
|
|
strlcpy(disk->d_descr, descr, sizeof(descr));
|
2012-09-17 19:23:01 +00:00
|
|
|
#endif
|
|
|
|
|
|
|
|
ndisk->ns = ns;
|
|
|
|
ndisk->disk = disk;
|
|
|
|
ndisk->cur_depth = 0;
|
2016-01-07 16:06:23 +00:00
|
|
|
ndisk->ordered_in_flight = 0;
|
2012-09-17 19:23:01 +00:00
|
|
|
|
|
|
|
mtx_init(&ndisk->bioqlock, "NVD bioq lock", NULL, MTX_DEF);
|
|
|
|
bioq_init(&ndisk->bioq);
|
|
|
|
|
|
|
|
TASK_INIT(&ndisk->bioqtask, 0, nvd_bioq_process, ndisk);
|
|
|
|
ndisk->tq = taskqueue_create("nvd_taskq", M_WAITOK,
|
|
|
|
taskqueue_thread_enqueue, &ndisk->tq);
|
|
|
|
taskqueue_start_threads(&ndisk->tq, 1, PI_DISK, "nvd taskq");
|
|
|
|
|
2013-03-26 21:45:37 +00:00
|
|
|
TAILQ_INSERT_TAIL(&disk_head, ndisk, global_tailq);
|
|
|
|
TAILQ_INSERT_TAIL(&ctrlr->disk_head, ndisk, ctrlr_tailq);
|
2013-03-26 18:39:54 +00:00
|
|
|
|
2013-07-19 21:30:53 +00:00
|
|
|
disk_create(disk, DISK_VERSION);
|
|
|
|
|
2013-07-19 21:40:57 +00:00
|
|
|
printf(NVD_STR"%u: <%s> NVMe namespace\n", disk->d_unit, descr);
|
|
|
|
printf(NVD_STR"%u: %juMB (%ju %u byte sectors)\n", disk->d_unit,
|
|
|
|
(uintmax_t)disk->d_mediasize / (1024*1024),
|
|
|
|
(uintmax_t)disk->d_mediasize / disk->d_sectorsize,
|
|
|
|
disk->d_sectorsize);
|
|
|
|
|
2013-03-26 18:39:54 +00:00
|
|
|
return (NULL);
|
2012-09-17 19:23:01 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
destroy_geom_disk(struct nvd_disk *ndisk)
|
|
|
|
{
|
2013-07-19 21:40:57 +00:00
|
|
|
struct bio *bp;
|
|
|
|
struct disk *disk;
|
|
|
|
uint32_t unit;
|
|
|
|
int cnt = 0;
|
2012-09-17 19:23:01 +00:00
|
|
|
|
2013-07-19 21:40:57 +00:00
|
|
|
disk = ndisk->disk;
|
|
|
|
unit = disk->d_unit;
|
2012-09-17 19:23:01 +00:00
|
|
|
taskqueue_free(ndisk->tq);
|
2013-07-19 21:40:57 +00:00
|
|
|
|
2012-09-17 19:23:01 +00:00
|
|
|
disk_destroy(ndisk->disk);
|
|
|
|
|
|
|
|
mtx_lock(&ndisk->bioqlock);
|
|
|
|
for (;;) {
|
|
|
|
bp = bioq_takefirst(&ndisk->bioq);
|
|
|
|
if (bp == NULL)
|
|
|
|
break;
|
|
|
|
bp->bio_error = EIO;
|
|
|
|
bp->bio_flags |= BIO_ERROR;
|
|
|
|
bp->bio_resid = bp->bio_bcount;
|
2013-07-19 21:40:57 +00:00
|
|
|
cnt++;
|
2012-09-17 19:23:01 +00:00
|
|
|
biodone(bp);
|
|
|
|
}
|
2013-07-19 21:40:57 +00:00
|
|
|
|
|
|
|
printf(NVD_STR"%u: lost device - %d outstanding\n", unit, cnt);
|
|
|
|
printf(NVD_STR"%u: removing device entry\n", unit);
|
|
|
|
|
2012-09-17 19:23:01 +00:00
|
|
|
mtx_unlock(&ndisk->bioqlock);
|
|
|
|
|
|
|
|
mtx_destroy(&ndisk->bioqlock);
|
|
|
|
}
|
2013-03-26 21:58:38 +00:00
|
|
|
|
|
|
|
static void
|
|
|
|
nvd_controller_fail(void *ctrlr_arg)
|
|
|
|
{
|
|
|
|
struct nvd_controller *ctrlr = ctrlr_arg;
|
|
|
|
struct nvd_disk *disk;
|
|
|
|
|
|
|
|
while (!TAILQ_EMPTY(&ctrlr->disk_head)) {
|
|
|
|
disk = TAILQ_FIRST(&ctrlr->disk_head);
|
|
|
|
TAILQ_REMOVE(&disk_head, disk, global_tailq);
|
|
|
|
TAILQ_REMOVE(&ctrlr->disk_head, disk, ctrlr_tailq);
|
|
|
|
destroy_geom_disk(disk);
|
|
|
|
free(disk, M_NVD);
|
|
|
|
}
|
|
|
|
|
|
|
|
TAILQ_REMOVE(&ctrlr_head, ctrlr, tailq);
|
|
|
|
free(ctrlr, M_NVD);
|
|
|
|
}
|
|
|
|
|