d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
53f48a2373
freebsd-skq/sys/cam/nvme/nvme_da.c
imp 7d2000167a New NVMe front end (nda).
2016-06-09 22:39:02 +00:00

1153 lines
29 KiB
C
Raw Blame History

/*-
* Copyright (c) 2015 Netflix, Inc
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Derived from ata_da.c:
* Copyright (c) 2009 Alexander Motin <mav@FreeBSD.org>
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#ifdef _KERNEL
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bio.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/conf.h>
#include <sys/devicestat.h>
#include <sys/eventhandler.h>
#include <sys/malloc.h>
#include <sys/cons.h>
#include <sys/proc.h>
#include <sys/reboot.h>
#include <geom/geom_disk.h>
#endif /* _KERNEL */
#ifndef _KERNEL
#include <stdio.h>
#include <string.h>
#endif /* _KERNEL */
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_periph.h>
#include <cam/cam_xpt_periph.h>
#include <cam/cam_sim.h>
#include <cam/cam_iosched.h>
#include <cam/nvme/nvme_all.h>
typedef enum {
NDA_STATE_NORMAL
} nda_state;
typedef enum {
NDA_FLAG_OPEN = 0x0001,
NDA_FLAG_DIRTY = 0x0002,
NDA_FLAG_SCTX_INIT = 0x0004,
} nda_flags;
typedef enum {
NDA_Q_4K = 0x01,
NDA_Q_NONE = 0x00,
} nda_quirks;
#define NDA_Q_BIT_STRING \
"\020" \
"\001Bit 0"
typedef enum {
NDA_CCB_BUFFER_IO = 0x01,
NDA_CCB_DUMP = 0x02,
NDA_CCB_TRIM = 0x03,
NDA_CCB_TYPE_MASK = 0x0F,
} nda_ccb_state;
/* Offsets into our private area for storing information */
#define ccb_state ppriv_field0
#define ccb_bp ppriv_ptr1
struct trim_request {
TAILQ_HEAD(, bio) bps;
};
struct nda_softc {
struct cam_iosched_softc *cam_iosched;
int outstanding_cmds; /* Number of active commands */
int refcount; /* Active xpt_action() calls */
nda_state state;
nda_flags flags;
nda_quirks quirks;
int unmappedio;
uint32_t nsid; /* Namespace ID for this nda device */
struct disk *disk;
struct task sysctl_task;
struct sysctl_ctx_list sysctl_ctx;
struct sysctl_oid *sysctl_tree;
struct trim_request trim_req;
#ifdef CAM_IO_STATS
struct sysctl_ctx_list sysctl_stats_ctx;
struct sysctl_oid *sysctl_stats_tree;
u_int timeouts;
u_int errors;
u_int invalidations;
#endif
};
/* Need quirk table */
static disk_strategy_t ndastrategy;
static dumper_t ndadump;
static periph_init_t ndainit;
static void ndaasync(void *callback_arg, u_int32_t code,
struct cam_path *path, void *arg);
static void ndasysctlinit(void *context, int pending);
static periph_ctor_t ndaregister;
static periph_dtor_t ndacleanup;
static periph_start_t ndastart;
static periph_oninv_t ndaoninvalidate;
static void ndadone(struct cam_periph *periph,
union ccb *done_ccb);
static int ndaerror(union ccb *ccb, u_int32_t cam_flags,
u_int32_t sense_flags);
static void ndashutdown(void *arg, int howto);
static void ndasuspend(void *arg);
#ifndef NDA_DEFAULT_SEND_ORDERED
#define NDA_DEFAULT_SEND_ORDERED 1
#endif
#ifndef NDA_DEFAULT_TIMEOUT
#define NDA_DEFAULT_TIMEOUT 30 /* Timeout in seconds */
#endif
#ifndef NDA_DEFAULT_RETRY
#define NDA_DEFAULT_RETRY 4
#endif
//static int nda_retry_count = NDA_DEFAULT_RETRY;
static int nda_send_ordered = NDA_DEFAULT_SEND_ORDERED;
static int nda_default_timeout = NDA_DEFAULT_TIMEOUT;
/*
* All NVMe media is non-rotational, so all nvme device instances
* share this to implement the sysctl.
*/
static int nda_rotating_media = 0;
static SYSCTL_NODE(_kern_cam, OID_AUTO, nda, CTLFLAG_RD, 0,
"CAM Direct Access Disk driver");
static struct periph_driver ndadriver =
{
ndainit, "nda",
TAILQ_HEAD_INITIALIZER(ndadriver.units), /* generation */ 0
};
PERIPHDRIVER_DECLARE(nda, ndadriver);
static MALLOC_DEFINE(M_NVMEDA, "nvme_da", "nvme_da buffers");
/*
* nice wrappers. Maybe these belong in nvme_all.c instead of
* here, but this is the only place that uses these. Should
* we ever grow another NVME periph, we should move them
* all there wholesale.
*/
static void
nda_nvme_flush(struct nda_softc *softc, struct ccb_nvmeio *nvmeio)
{
cam_fill_nvmeio(nvmeio,
0, /* retries */
ndadone, /* cbfcnp */
CAM_DIR_NONE, /* flags */
NULL, /* data_ptr */
0, /* dxfer_len */
nda_default_timeout * 1000); /* timeout 5s */
nvme_ns_flush_cmd(&nvmeio->cmd, softc->nsid);
}
static void
nda_nvme_trim(struct nda_softc *softc, struct ccb_nvmeio *nvmeio,
void *payload, uint32_t num_ranges)
{
cam_fill_nvmeio(nvmeio,
0, /* retries */
ndadone, /* cbfcnp */
CAM_DIR_OUT, /* flags */
payload, /* data_ptr */
num_ranges * sizeof(struct nvme_dsm_range), /* dxfer_len */
nda_default_timeout * 1000); /* timeout 5s */
nvme_ns_trim_cmd(&nvmeio->cmd, softc->nsid, num_ranges);
}
static void
nda_nvme_write(struct nda_softc *softc, struct ccb_nvmeio *nvmeio,
void *payload, uint64_t lba, uint32_t len, uint32_t count)
{
cam_fill_nvmeio(nvmeio,
0, /* retries */
ndadone, /* cbfcnp */
CAM_DIR_OUT, /* flags */
payload, /* data_ptr */
len, /* dxfer_len */
nda_default_timeout * 1000); /* timeout 5s */
nvme_ns_write_cmd(&nvmeio->cmd, softc->nsid, lba, count);
}
static void
nda_nvme_rw_bio(struct nda_softc *softc, struct ccb_nvmeio *nvmeio,
struct bio *bp, uint32_t rwcmd)
{
int flags = rwcmd == NVME_OPC_READ ? CAM_DIR_IN : CAM_DIR_OUT;
void *payload;
uint64_t lba;
uint32_t count;
if (bp->bio_flags & BIO_UNMAPPED) {
flags |= CAM_DATA_BIO;
payload = bp;
} else {
payload = bp->bio_data;
}
lba = bp->bio_pblkno;
count = bp->bio_bcount / softc->disk->d_sectorsize;
cam_fill_nvmeio(nvmeio,
0, /* retries */
ndadone, /* cbfcnp */
flags, /* flags */
payload, /* data_ptr */
bp->bio_bcount, /* dxfer_len */
nda_default_timeout * 1000); /* timeout 5s */
nvme_ns_rw_cmd(&nvmeio->cmd, rwcmd, softc->nsid, lba, count);
}
static int
ndaopen(struct disk *dp)
{
struct cam_periph *periph;
struct nda_softc *softc;
int error;
periph = (struct cam_periph *)dp->d_drv1;
if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
return(ENXIO);
}
cam_periph_lock(periph);
if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) {
cam_periph_unlock(periph);
cam_periph_release(periph);
return (error);
}
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE | CAM_DEBUG_PERIPH,
("ndaopen\n"));
softc = (struct nda_softc *)periph->softc;
softc->flags |= NDA_FLAG_OPEN;
cam_periph_unhold(periph);
cam_periph_unlock(periph);
return (0);
}
static int
ndaclose(struct disk *dp)
{
struct cam_periph *periph;
struct nda_softc *softc;
union ccb *ccb;
int error;
periph = (struct cam_periph *)dp->d_drv1;
softc = (struct nda_softc *)periph->softc;
cam_periph_lock(periph);
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE | CAM_DEBUG_PERIPH,
("ndaclose\n"));
if ((softc->flags & NDA_FLAG_DIRTY) != 0 &&
(periph->flags & CAM_PERIPH_INVALID) == 0 &&
cam_periph_hold(periph, PRIBIO) == 0) {
ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
nda_nvme_flush(softc, &ccb->nvmeio);
error = cam_periph_runccb(ccb, ndaerror, /*cam_flags*/0,
/*sense_flags*/0, softc->disk->d_devstat);
if (error != 0)
xpt_print(periph->path, "Synchronize cache failed\n");
else
softc->flags &= ~NDA_FLAG_DIRTY;
xpt_release_ccb(ccb);
cam_periph_unhold(periph);
}
softc->flags &= ~NDA_FLAG_OPEN;
while (softc->refcount != 0)
cam_periph_sleep(periph, &softc->refcount, PRIBIO, "ndaclose", 1);
cam_periph_unlock(periph);
cam_periph_release(periph);
return (0);
}
static void
ndaschedule(struct cam_periph *periph)
{
struct nda_softc *softc = (struct nda_softc *)periph->softc;
if (softc->state != NDA_STATE_NORMAL)
return;
cam_iosched_schedule(softc->cam_iosched, periph);
}
/*
* Actually translate the requested transfer into one the physical driver
* can understand. The transfer is described by a buf and will include
* only one physical transfer.
*/
static void
ndastrategy(struct bio *bp)
{
struct cam_periph *periph;
struct nda_softc *softc;
periph = (struct cam_periph *)bp->bio_disk->d_drv1;
softc = (struct nda_softc *)periph->softc;
cam_periph_lock(periph);
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastrategy(%p)\n", bp));
/*
* If the device has been made invalid, error out
*/
if ((periph->flags & CAM_PERIPH_INVALID) != 0) {
cam_periph_unlock(periph);
biofinish(bp, NULL, ENXIO);
return;
}
/*
* Place it in the queue of disk activities for this disk
*/
cam_iosched_queue_work(softc->cam_iosched, bp);
/*
* Schedule ourselves for performing the work.
*/
ndaschedule(periph);
cam_periph_unlock(periph);
return;
}
static int
ndadump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
{
struct cam_periph *periph;
struct nda_softc *softc;
u_int secsize;
union ccb ccb;
struct disk *dp;
uint64_t lba;
uint32_t count;
int error = 0;
dp = arg;
periph = dp->d_drv1;
softc = (struct nda_softc *)periph->softc;
cam_periph_lock(periph);
secsize = softc->disk->d_sectorsize;
lba = offset / secsize;
count = length / secsize;
if ((periph->flags & CAM_PERIPH_INVALID) != 0) {
cam_periph_unlock(periph);
return (ENXIO);
}
if (length > 0) {
xpt_setup_ccb(&ccb.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
ccb.ccb_h.ccb_state = NDA_CCB_DUMP;
nda_nvme_write(softc, &ccb.nvmeio, virtual, lba, length, count);
xpt_polled_action(&ccb);
error = cam_periph_error(&ccb,
0, SF_NO_RECOVERY | SF_NO_RETRY, NULL);
if ((ccb.ccb_h.status & CAM_DEV_QFRZN) != 0)
cam_release_devq(ccb.ccb_h.path, /*relsim_flags*/0,
/*reduction*/0, /*timeout*/0, /*getcount_only*/0);
if (error != 0)
printf("Aborting dump due to I/O error.\n");
cam_periph_unlock(periph);
return (error);
}
/* Flush */
xpt_setup_ccb(&ccb.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
ccb.ccb_h.ccb_state = NDA_CCB_DUMP;
nda_nvme_flush(softc, &ccb.nvmeio);
xpt_polled_action(&ccb);
error = cam_periph_error(&ccb,
0, SF_NO_RECOVERY | SF_NO_RETRY, NULL);
if ((ccb.ccb_h.status & CAM_DEV_QFRZN) != 0)
cam_release_devq(ccb.ccb_h.path, /*relsim_flags*/0,
/*reduction*/0, /*timeout*/0, /*getcount_only*/0);
if (error != 0)
xpt_print(periph->path, "flush cmd failed\n");
cam_periph_unlock(periph);
return (error);
}
static void
ndainit(void)
{
cam_status status;
/*
* Install a global async callback. This callback will
* receive async callbacks like "new device found".
*/
status = xpt_register_async(AC_FOUND_DEVICE, ndaasync, NULL, NULL);
if (status != CAM_REQ_CMP) {
printf("nda: Failed to attach master async callback "
"due to status 0x%x!\n", status);
} else if (nda_send_ordered) {
/* Register our event handlers */
if ((EVENTHANDLER_REGISTER(power_suspend, ndasuspend,
NULL, EVENTHANDLER_PRI_LAST)) == NULL)
printf("ndainit: power event registration failed!\n");
if ((EVENTHANDLER_REGISTER(shutdown_post_sync, ndashutdown,
NULL, SHUTDOWN_PRI_DEFAULT)) == NULL)
printf("ndainit: shutdown event registration failed!\n");
}
}
/*
* Callback from GEOM, called when it has finished cleaning up its
* resources.
*/
static void
ndadiskgonecb(struct disk *dp)
{
struct cam_periph *periph;
periph = (struct cam_periph *)dp->d_drv1;
cam_periph_release(periph);
}
static void
ndaoninvalidate(struct cam_periph *periph)
{
struct nda_softc *softc;
softc = (struct nda_softc *)periph->softc;
/*
* De-register any async callbacks.
*/
xpt_register_async(0, ndaasync, periph, periph->path);
#ifdef CAM_IO_STATS
softc->invalidations++;
#endif
/*
* Return all queued I/O with ENXIO.
* XXX Handle any transactions queued to the card
* with XPT_ABORT_CCB.
*/
cam_iosched_flush(softc->cam_iosched, NULL, ENXIO);
disk_gone(softc->disk);
}
static void
ndacleanup(struct cam_periph *periph)
{
struct nda_softc *softc;
softc = (struct nda_softc *)periph->softc;
cam_periph_unlock(periph);
cam_iosched_fini(softc->cam_iosched);
/*
* If we can't free the sysctl tree, oh well...
*/
if ((softc->flags & NDA_FLAG_SCTX_INIT) != 0) {
#ifdef CAM_IO_STATS
if (sysctl_ctx_free(&softc->sysctl_stats_ctx) != 0)
xpt_print(periph->path,
"can't remove sysctl stats context\n");
#endif
if (sysctl_ctx_free(&softc->sysctl_ctx) != 0)
xpt_print(periph->path,
"can't remove sysctl context\n");
}
disk_destroy(softc->disk);
free(softc, M_DEVBUF);
cam_periph_lock(periph);
}
static void
ndaasync(void *callback_arg, u_int32_t code,
struct cam_path *path, void *arg)
{
struct cam_periph *periph;
periph = (struct cam_periph *)callback_arg;
switch (code) {
case AC_FOUND_DEVICE:
{
struct ccb_getdev *cgd;
cam_status status;
cgd = (struct ccb_getdev *)arg;
if (cgd == NULL)
break;
if (cgd->protocol != PROTO_NVME)
break;
/*
* Allocate a peripheral instance for
* this device and start the probe
* process.
*/
status = cam_periph_alloc(ndaregister, ndaoninvalidate,
ndacleanup, ndastart,
"nda", CAM_PERIPH_BIO,
path, ndaasync,
AC_FOUND_DEVICE, cgd);
if (status != CAM_REQ_CMP
&& status != CAM_REQ_INPROG)
printf("ndaasync: Unable to attach to new device "
"due to status 0x%x\n", status);
break;
}
case AC_ADVINFO_CHANGED:
{
uintptr_t buftype;
buftype = (uintptr_t)arg;
if (buftype == CDAI_TYPE_PHYS_PATH) {
struct nda_softc *softc;
softc = periph->softc;
disk_attr_changed(softc->disk, "GEOM::physpath",
M_NOWAIT);
}
break;
}
case AC_LOST_DEVICE:
default:
cam_periph_async(periph, code, path, arg);
break;
}
}
static void
ndasysctlinit(void *context, int pending)
{
struct cam_periph *periph;
struct nda_softc *softc;
char tmpstr[80], tmpstr2[80];
periph = (struct cam_periph *)context;
/* periph was held for us when this task was enqueued */
if ((periph->flags & CAM_PERIPH_INVALID) != 0) {
cam_periph_release(periph);
return;
}
softc = (struct nda_softc *)periph->softc;
snprintf(tmpstr, sizeof(tmpstr), "CAM NDA unit %d", periph->unit_number);
snprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number);
sysctl_ctx_init(&softc->sysctl_ctx);
softc->flags |= NDA_FLAG_SCTX_INIT;
softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
SYSCTL_STATIC_CHILDREN(_kern_cam_nda), OID_AUTO, tmpstr2,
CTLFLAG_RD, 0, tmpstr);
if (softc->sysctl_tree == NULL) {
printf("ndasysctlinit: unable to allocate sysctl tree\n");
cam_periph_release(periph);
return;
}
SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
OID_AUTO, "unmapped_io", CTLFLAG_RD | CTLFLAG_MPSAFE,
&softc->unmappedio, 0, "Unmapped I/O leaf");
SYSCTL_ADD_INT(&softc->sysctl_ctx,
SYSCTL_CHILDREN(softc->sysctl_tree),
OID_AUTO,
"rotating",
CTLFLAG_RD | CTLFLAG_MPSAFE,
&nda_rotating_media,
0,
"Rotating media");
#ifdef CAM_IO_STATS
softc->sysctl_stats_tree = SYSCTL_ADD_NODE(&softc->sysctl_stats_ctx,
SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO, "stats",
CTLFLAG_RD, 0, "Statistics");
if (softc->sysctl_stats_tree == NULL) {
printf("ndasysctlinit: unable to allocate sysctl tree for stats\n");
cam_periph_release(periph);
return;
}
SYSCTL_ADD_INT(&softc->sysctl_stats_ctx,
SYSCTL_CHILDREN(softc->sysctl_stats_tree),
OID_AUTO, "timeouts", CTLFLAG_RD | CTLFLAG_MPSAFE,
&softc->timeouts, 0,
"Device timeouts reported by the SIM");
SYSCTL_ADD_INT(&softc->sysctl_stats_ctx,
SYSCTL_CHILDREN(softc->sysctl_stats_tree),
OID_AUTO, "errors", CTLFLAG_RD | CTLFLAG_MPSAFE,
&softc->errors, 0,
"Transport errors reported by the SIM.");
SYSCTL_ADD_INT(&softc->sysctl_stats_ctx,
SYSCTL_CHILDREN(softc->sysctl_stats_tree),
OID_AUTO, "pack_invalidations", CTLFLAG_RD | CTLFLAG_MPSAFE,
&softc->invalidations, 0,
"Device pack invalidations.");
#endif
cam_iosched_sysctl_init(softc->cam_iosched, &softc->sysctl_ctx,
softc->sysctl_tree);
cam_periph_release(periph);
}
static int
ndagetattr(struct bio *bp)
{
int ret;
struct cam_periph *periph;
periph = (struct cam_periph *)bp->bio_disk->d_drv1;
cam_periph_lock(periph);
ret = xpt_getattr(bp->bio_data, bp->bio_length, bp->bio_attribute,
periph->path);
cam_periph_unlock(periph);
if (ret == 0)
bp->bio_completed = bp->bio_length;
return ret;
}
static cam_status
ndaregister(struct cam_periph *periph, void *arg)
{
struct nda_softc *softc;
struct disk *disk;
struct ccb_pathinq cpi;
struct ccb_getdev *cgd;
const struct nvme_namespace_data *nsd;
const struct nvme_controller_data *cd;
char announce_buf[80];
// caddr_t match;
u_int maxio;
int quirks;
cgd = (struct ccb_getdev *)arg;
if (cgd == NULL) {
printf("ndaregister: no getdev CCB, can't register device\n");
return(CAM_REQ_CMP_ERR);
}
nsd = cgd->nvme_data;
cd = cgd->nvme_cdata;
softc = (struct nda_softc *)malloc(sizeof(*softc), M_DEVBUF,
M_NOWAIT | M_ZERO);
if (softc == NULL) {
printf("ndaregister: Unable to probe new device. "
"Unable to allocate softc\n");
return(CAM_REQ_CMP_ERR);
}
if (cam_iosched_init(&softc->cam_iosched, periph) != 0) {
printf("ndaregister: Unable to probe new device. "
"Unable to allocate iosched memory\n");
return(CAM_REQ_CMP_ERR);
}
/* ident_data parsing */
periph->softc = softc;
#if 0
/*
* See if this device has any quirks.
*/
match = cam_quirkmatch((caddr_t)&cgd->ident_data,
(caddr_t)nda_quirk_table,
sizeof(nda_quirk_table)/sizeof(*nda_quirk_table),
sizeof(*nda_quirk_table), ata_identify_match);
if (match != NULL)
softc->quirks = ((struct nda_quirk_entry *)match)->quirks;
else
#endif
softc->quirks = NDA_Q_NONE;
bzero(&cpi, sizeof(cpi));
xpt_setup_ccb(&cpi.ccb_h, periph->path, CAM_PRIORITY_NONE);
cpi.ccb_h.func_code = XPT_PATH_INQ;
xpt_action((union ccb *)&cpi);
TASK_INIT(&softc->sysctl_task, 0, ndasysctlinit, periph);
/*
* The name space ID is the lun, save it for later I/O
*/
softc->nsid = (uint16_t)xpt_path_lun_id(periph->path);
/*
* Register this media as a disk
*/
(void)cam_periph_hold(periph, PRIBIO);
cam_periph_unlock(periph);
snprintf(announce_buf, sizeof(announce_buf),
"kern.cam.nda.%d.quirks", periph->unit_number);
quirks = softc->quirks;
TUNABLE_INT_FETCH(announce_buf, &quirks);
softc->quirks = quirks;
cam_iosched_set_sort_queue(softc->cam_iosched, 0);
softc->disk = disk = disk_alloc();
strlcpy(softc->disk->d_descr, cd->mn,
MIN(sizeof(softc->disk->d_descr), sizeof(cd->mn)));
strlcpy(softc->disk->d_ident, cd->sn,
MIN(sizeof(softc->disk->d_ident), sizeof(cd->sn)));
disk->d_rotation_rate = 0; /* Spinning rust need not apply */
disk->d_open = ndaopen;
disk->d_close = ndaclose;
disk->d_strategy = ndastrategy;
disk->d_getattr = ndagetattr;
disk->d_dump = ndadump;
disk->d_gone = ndadiskgonecb;
disk->d_name = "nda";
disk->d_drv1 = periph;
disk->d_unit = periph->unit_number;
maxio = cpi.maxio; /* Honor max I/O size of SIM */
if (maxio == 0)
maxio = DFLTPHYS; /* traditional default */
else if (maxio > MAXPHYS)
maxio = MAXPHYS; /* for safety */
disk->d_maxsize = maxio;
disk->d_sectorsize = 1 << nsd->lbaf[nsd->flbas.format].lbads;
disk->d_mediasize = (off_t)(disk->d_sectorsize * nsd->nsze);
disk->d_delmaxsize = disk->d_mediasize;
disk->d_flags = DISKFLAG_DIRECT_COMPLETION;
// if (cd->oncs.dsm) // XXX broken?
disk->d_flags |= DISKFLAG_CANDELETE;
if (cd->vwc.present)
disk->d_flags |= DISKFLAG_CANFLUSHCACHE;
if ((cpi.hba_misc & PIM_UNMAPPED) != 0) {
disk->d_flags |= DISKFLAG_UNMAPPED_BIO;
softc->unmappedio = 1;
}
/*
* d_ident and d_descr are both far bigger than the length of either
* the serial or model number strings.
*/
nvme_strvis(disk->d_descr, cd->mn,
sizeof(disk->d_descr), NVME_MODEL_NUMBER_LENGTH);
nvme_strvis(disk->d_ident, cd->sn,
sizeof(disk->d_ident), NVME_SERIAL_NUMBER_LENGTH);
disk->d_hba_vendor = cpi.hba_vendor;
disk->d_hba_device = cpi.hba_device;
disk->d_hba_subvendor = cpi.hba_subvendor;
disk->d_hba_subdevice = cpi.hba_subdevice;
disk->d_stripesize = disk->d_sectorsize;
disk->d_stripeoffset = 0;
disk->d_devstat = devstat_new_entry(periph->periph_name,
periph->unit_number, disk->d_sectorsize,
DEVSTAT_ALL_SUPPORTED,
DEVSTAT_TYPE_DIRECT | XPORT_DEVSTAT_TYPE(cpi.transport),
DEVSTAT_PRIORITY_DISK);
/*
* Acquire a reference to the periph before we register with GEOM.
* We'll release this reference once GEOM calls us back (via
* ndadiskgonecb()) telling us that our provider has been freed.
*/
if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
xpt_print(periph->path, "%s: lost periph during "
"registration!\n", __func__);
cam_periph_lock(periph);
return (CAM_REQ_CMP_ERR);
}
disk_create(softc->disk, DISK_VERSION);
cam_periph_lock(periph);
cam_periph_unhold(periph);
snprintf(announce_buf, sizeof(announce_buf),
"%juMB (%ju %u byte sectors)",
(uintmax_t)((uintmax_t)disk->d_mediasize / (1024*1024)),
(uintmax_t)disk->d_mediasize / disk->d_sectorsize,
disk->d_sectorsize);
xpt_announce_periph(periph, announce_buf);
xpt_announce_quirks(periph, softc->quirks, NDA_Q_BIT_STRING);
/*
* Create our sysctl variables, now that we know
* we have successfully attached.
*/
if (cam_periph_acquire(periph) == CAM_REQ_CMP)
taskqueue_enqueue(taskqueue_thread, &softc->sysctl_task);
/*
* Register for device going away and info about the drive
* changing (though with NVMe, it can't)
*/
xpt_register_async(AC_LOST_DEVICE | AC_ADVINFO_CHANGED,
ndaasync, periph, periph->path);
softc->state = NDA_STATE_NORMAL;
return(CAM_REQ_CMP);
}
static void
ndastart(struct cam_periph *periph, union ccb *start_ccb)
{
struct nda_softc *softc = (struct nda_softc *)periph->softc;
struct ccb_nvmeio *nvmeio = &start_ccb->nvmeio;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastart\n"));
switch (softc->state) {
case NDA_STATE_NORMAL:
{
struct bio *bp;
bp = cam_iosched_next_bio(softc->cam_iosched);
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastart: bio %p\n", bp));
if (bp == NULL) {
xpt_release_ccb(start_ccb);
break;
}
switch (bp->bio_cmd) {
case BIO_WRITE:
softc->flags |= NDA_FLAG_DIRTY;
/* FALLTHROUGH */
case BIO_READ:
{
#ifdef NDA_TEST_FAILURE
int fail = 0;
/*
* Support the failure ioctls. If the command is a
* read, and there are pending forced read errors, or
* if a write and pending write errors, then fail this
* operation with EIO. This is useful for testing
* purposes. Also, support having every Nth read fail.
*
* This is a rather blunt tool.
*/
if (bp->bio_cmd == BIO_READ) {
if (softc->force_read_error) {
softc->force_read_error--;
fail = 1;
}
if (softc->periodic_read_error > 0) {
if (++softc->periodic_read_count >=
softc->periodic_read_error) {
softc->periodic_read_count = 0;
fail = 1;
}
}
} else {
if (softc->force_write_error) {
softc->force_write_error--;
fail = 1;
}
}
if (fail) {
biofinish(bp, NULL, EIO);
xpt_release_ccb(start_ccb);
ndaschedule(periph);
return;
}
#endif
KASSERT((bp->bio_flags & BIO_UNMAPPED) == 0 ||
round_page(bp->bio_bcount + bp->bio_ma_offset) /
PAGE_SIZE == bp->bio_ma_n,
("Short bio %p", bp));
nda_nvme_rw_bio(softc, &start_ccb->nvmeio, bp, bp->bio_cmd == BIO_READ ?
NVME_OPC_READ : NVME_OPC_WRITE);
break;
}
case BIO_DELETE:
{
struct nvme_dsm_range *dsm_range;
dsm_range =
malloc(sizeof(*dsm_range), M_NVMEDA, M_ZERO | M_WAITOK);
dsm_range->length =
bp->bio_bcount / softc->disk->d_sectorsize;
dsm_range->starting_lba =
bp->bio_offset / softc->disk->d_sectorsize;
bp->bio_driver2 = dsm_range;
nda_nvme_trim(softc, &start_ccb->nvmeio, dsm_range, 1);
start_ccb->ccb_h.ccb_state = NDA_CCB_TRIM;
start_ccb->ccb_h.flags |= CAM_UNLOCKED;
cam_iosched_submit_trim(softc->cam_iosched); /* XXX */
goto out;
}
case BIO_FLUSH:
nda_nvme_flush(softc, nvmeio);
break;
}
start_ccb->ccb_h.ccb_state = NDA_CCB_BUFFER_IO;
start_ccb->ccb_h.flags |= CAM_UNLOCKED;
out:
start_ccb->ccb_h.ccb_bp = bp;
softc->outstanding_cmds++;
softc->refcount++;
cam_periph_unlock(periph);
xpt_action(start_ccb);
cam_periph_lock(periph);
softc->refcount--;
/* May have more work to do, so ensure we stay scheduled */
ndaschedule(periph);
break;
}
}
}
static void
ndadone(struct cam_periph *periph, union ccb *done_ccb)
{
struct nda_softc *softc;
struct ccb_nvmeio *nvmeio = &done_ccb->nvmeio;
struct cam_path *path;
int state;
softc = (struct nda_softc *)periph->softc;
path = done_ccb->ccb_h.path;
CAM_DEBUG(path, CAM_DEBUG_TRACE, ("ndadone\n"));
state = nvmeio->ccb_h.ccb_state & NDA_CCB_TYPE_MASK;
switch (state) {
case NDA_CCB_BUFFER_IO:
case NDA_CCB_TRIM:
{
struct bio *bp;
int error;
cam_periph_lock(periph);
bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
error = ndaerror(done_ccb, 0, 0);
if (error == ERESTART) {
/* A retry was scheduled, so just return. */
cam_periph_unlock(periph);
return;
}
if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
cam_release_devq(path,
/*relsim_flags*/0,
/*reduction*/0,
/*timeout*/0,
/*getcount_only*/0);
} else {
if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
panic("REQ_CMP with QFRZN");
error = 0;
}
bp->bio_error = error;
if (error != 0) {
bp->bio_resid = bp->bio_bcount;
bp->bio_flags |= BIO_ERROR;
} else {
if (state == NDA_CCB_TRIM)
bp->bio_resid = 0;
else
bp->bio_resid = nvmeio->resid;
if (bp->bio_resid > 0)
bp->bio_flags |= BIO_ERROR;
}
if (state == NDA_CCB_TRIM)
free(bp->bio_driver2, M_NVMEDA);
softc->outstanding_cmds--;
cam_iosched_bio_complete(softc->cam_iosched, bp, done_ccb);
xpt_release_ccb(done_ccb);
if (state == NDA_CCB_TRIM) {
#ifdef notyet
TAILQ_HEAD(, bio) queue;
struct bio *bp1;
TAILQ_INIT(&queue);
TAILQ_CONCAT(&queue, &softc->trim_req.bps, bio_queue);
#endif
cam_iosched_trim_done(softc->cam_iosched);
ndaschedule(periph);
cam_periph_unlock(periph);
#ifdef notyet
/* Not yet collapsing several BIO_DELETE requests into one TRIM */
while ((bp1 = TAILQ_FIRST(&queue)) != NULL) {
TAILQ_REMOVE(&queue, bp1, bio_queue);
bp1->bio_error = error;
if (error != 0) {
bp1->bio_flags |= BIO_ERROR;
bp1->bio_resid = bp1->bio_bcount;
} else
bp1->bio_resid = 0;
biodone(bp1);
}
#else
biodone(bp);
#endif
} else {
ndaschedule(periph);
cam_periph_unlock(periph);
biodone(bp);
}
return;
}
case NDA_CCB_DUMP:
/* No-op. We're polling */
return;
default:
break;
}
xpt_release_ccb(done_ccb);
}
static int
ndaerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
{
struct nda_softc *softc;
struct cam_periph *periph;
periph = xpt_path_periph(ccb->ccb_h.path);
softc = (struct nda_softc *)periph->softc;
switch (ccb->ccb_h.status & CAM_STATUS_MASK) {
case CAM_CMD_TIMEOUT:
#ifdef CAM_IO_STATS
softc->timeouts++;
#endif
break;
case CAM_REQ_ABORTED:
case CAM_REQ_CMP_ERR:
case CAM_REQ_TERMIO:
case CAM_UNREC_HBA_ERROR:
case CAM_DATA_RUN_ERR:
case CAM_ATA_STATUS_ERROR:
#ifdef CAM_IO_STATS
softc->errors++;
#endif
break;
default:
break;
}
return(cam_periph_error(ccb, cam_flags, sense_flags, NULL));
}
/*
* Step through all NDA peripheral drivers, and if the device is still open,
* sync the disk cache to physical media.
*/
static void
ndaflush(void)
{
struct cam_periph *periph;
struct nda_softc *softc;
union ccb *ccb;
int error;
CAM_PERIPH_FOREACH(periph, &ndadriver) {
softc = (struct nda_softc *)periph->softc;
if (SCHEDULER_STOPPED()) {
/* If we paniced with the lock held, do not recurse. */
if (!cam_periph_owned(periph) &&
(softc->flags & NDA_FLAG_OPEN)) {
ndadump(softc->disk, NULL, 0, 0, 0);
}
continue;
}
cam_periph_lock(periph);
/*
* We only sync the cache if the drive is still open, and
* if the drive is capable of it..
*/
if ((softc->flags & NDA_FLAG_OPEN) == 0) {
cam_periph_unlock(periph);
continue;
}
ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
nda_nvme_flush(softc, &ccb->nvmeio);
error = cam_periph_runccb(ccb, ndaerror, /*cam_flags*/0,
/*sense_flags*/ SF_NO_RECOVERY | SF_NO_RETRY,
softc->disk->d_devstat);
if (error != 0)
xpt_print(periph->path, "Synchronize cache failed\n");
xpt_release_ccb(ccb);
cam_periph_unlock(periph);
}
}
static void
ndashutdown(void *arg, int howto)
{
ndaflush();
}
static void
ndasuspend(void *arg)
{
ndaflush();
}
Reference in New Issue View Git Blame Copy Permalink