svn commit: r253132 - in stable/9/sys/dev/virtio: . balloon block network pci scsi
Bryan Venteicher
bryanv at FreeBSD.org
Wed Jul 10 04:51:08 UTC 2013
Author: bryanv
Date: Wed Jul 10 04:51:07 2013
New Revision: 253132
URL: http://svnweb.freebsd.org/changeset/base/253132
Log:
MFC VirtIO r252702,r252703,r252704,r252706,r252707,r252708,r252709
This brings in several bug fixes and better conformance with various
aspects of the spec that have changed.
r252702: Convert VirtIO to use ithreads instead of taskqueues
r252703: Block driver bug fixes and spec changes
r252704: Balloon driver improvements
r252706: Minor network driver improvements
r252707: Minor misc VirtIO changes
r252708: PCI driver bug fixes and cleanup
r252709: Fix SCSI driver lock not owned panic
Modified:
stable/9/sys/dev/virtio/balloon/virtio_balloon.c
stable/9/sys/dev/virtio/block/virtio_blk.c
stable/9/sys/dev/virtio/block/virtio_blk.h
stable/9/sys/dev/virtio/network/if_vtnet.c
stable/9/sys/dev/virtio/network/if_vtnetvar.h
stable/9/sys/dev/virtio/pci/virtio_pci.c
stable/9/sys/dev/virtio/scsi/virtio_scsi.c
stable/9/sys/dev/virtio/scsi/virtio_scsivar.h
stable/9/sys/dev/virtio/virtio.c
stable/9/sys/dev/virtio/virtio.h
stable/9/sys/dev/virtio/virtio_bus_if.m
stable/9/sys/dev/virtio/virtio_if.m
stable/9/sys/dev/virtio/virtqueue.c
stable/9/sys/dev/virtio/virtqueue.h
Directory Properties:
stable/9/sys/ (props changed)
stable/9/sys/dev/ (props changed)
Modified: stable/9/sys/dev/virtio/balloon/virtio_balloon.c
==============================================================================
--- stable/9/sys/dev/virtio/balloon/virtio_balloon.c Wed Jul 10 01:33:49 2013 (r253131)
+++ stable/9/sys/dev/virtio/balloon/virtio_balloon.c Wed Jul 10 04:51:07 2013 (r253132)
@@ -1,5 +1,5 @@
/*-
- * Copyright (c) 2011, Bryan Venteicher <bryanv at daemoninthecloset.org>
+ * Copyright (c) 2011, Bryan Venteicher <bryanv at FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -70,7 +70,7 @@ struct vtballoon_softc {
uint32_t vtballoon_current_npages;
TAILQ_HEAD(,vm_page) vtballoon_pages;
- struct proc *vtballoon_kproc;
+ struct thread *vtballoon_td;
uint32_t *vtballoon_page_frames;
int vtballoon_timeout;
};
@@ -90,7 +90,7 @@ static int vtballoon_config_change(devic
static void vtballoon_negotiate_features(struct vtballoon_softc *);
static int vtballoon_alloc_virtqueues(struct vtballoon_softc *);
-static int vtballoon_vq_intr(void *);
+static void vtballoon_vq_intr(void *);
static void vtballoon_inflate(struct vtballoon_softc *, int);
static void vtballoon_deflate(struct vtballoon_softc *, int);
@@ -127,9 +127,9 @@ CTASSERT(VTBALLOON_PAGES_PER_REQUEST * s
#define VTBALLOON_MTX(_sc) &(_sc)->vtballoon_mtx
#define VTBALLOON_LOCK_INIT(_sc, _name) mtx_init(VTBALLOON_MTX((_sc)), _name, \
- "VirtIO Balloon Lock", MTX_SPIN)
-#define VTBALLOON_LOCK(_sc) mtx_lock_spin(VTBALLOON_MTX((_sc)))
-#define VTBALLOON_UNLOCK(_sc) mtx_unlock_spin(VTBALLOON_MTX((_sc)))
+ "VirtIO Balloon Lock", MTX_DEF)
+#define VTBALLOON_LOCK(_sc) mtx_lock(VTBALLOON_MTX((_sc)))
+#define VTBALLOON_UNLOCK(_sc) mtx_unlock(VTBALLOON_MTX((_sc)))
#define VTBALLOON_LOCK_DESTROY(_sc) mtx_destroy(VTBALLOON_MTX((_sc)))
static device_method_t vtballoon_methods[] = {
@@ -206,10 +206,10 @@ vtballoon_attach(device_t dev)
goto fail;
}
- error = kproc_create(vtballoon_thread, sc, &sc->vtballoon_kproc,
+ error = kthread_add(vtballoon_thread, sc, NULL, &sc->vtballoon_td,
0, 0, "virtio_balloon");
if (error) {
- device_printf(dev, "cannot create balloon kproc\n");
+ device_printf(dev, "cannot create balloon kthread\n");
goto fail;
}
@@ -230,15 +230,14 @@ vtballoon_detach(device_t dev)
sc = device_get_softc(dev);
- if (sc->vtballoon_kproc != NULL) {
+ if (sc->vtballoon_td != NULL) {
VTBALLOON_LOCK(sc);
sc->vtballoon_flags |= VTBALLOON_FLAG_DETACH;
wakeup_one(sc);
- msleep_spin(sc->vtballoon_kproc, VTBALLOON_MTX(sc),
- "vtbdth", 0);
+ msleep(sc->vtballoon_td, VTBALLOON_MTX(sc), 0, "vtbdth", 0);
VTBALLOON_UNLOCK(sc);
- sc->vtballoon_kproc = NULL;
+ sc->vtballoon_td = NULL;
}
if (device_is_attached(dev)) {
@@ -300,7 +299,7 @@ vtballoon_alloc_virtqueues(struct vtball
return (virtio_alloc_virtqueues(dev, 0, nvqs, vq_info));
}
-static int
+static void
vtballoon_vq_intr(void *xsc)
{
struct vtballoon_softc *sc;
@@ -310,8 +309,6 @@ vtballoon_vq_intr(void *xsc)
VTBALLOON_LOCK(sc);
wakeup_one(sc);
VTBALLOON_UNLOCK(sc);
-
- return (1);
}
static void
@@ -322,28 +319,26 @@ vtballoon_inflate(struct vtballoon_softc
int i;
vq = sc->vtballoon_inflate_vq;
- m = NULL;
if (npages > VTBALLOON_PAGES_PER_REQUEST)
npages = VTBALLOON_PAGES_PER_REQUEST;
- KASSERT(npages > 0, ("balloon doesn't need inflating?"));
for (i = 0; i < npages; i++) {
- if ((m = vtballoon_alloc_page(sc)) == NULL)
+ if ((m = vtballoon_alloc_page(sc)) == NULL) {
+ sc->vtballoon_timeout = VTBALLOON_LOWMEM_TIMEOUT;
break;
+ }
sc->vtballoon_page_frames[i] =
VM_PAGE_TO_PHYS(m) >> VIRTIO_BALLOON_PFN_SHIFT;
- KASSERT(m->queue == PQ_NONE, ("allocated page on queue"));
+ KASSERT(m->queue == PQ_NONE,
+ ("%s: allocated page %p on queue", __func__, m));
TAILQ_INSERT_TAIL(&sc->vtballoon_pages, m, pageq);
}
if (i > 0)
vtballoon_send_page_frames(sc, vq, i);
-
- if (m == NULL)
- sc->vtballoon_timeout = VTBALLOON_LOWMEM_TIMEOUT;
}
static void
@@ -359,11 +354,10 @@ vtballoon_deflate(struct vtballoon_softc
if (npages > VTBALLOON_PAGES_PER_REQUEST)
npages = VTBALLOON_PAGES_PER_REQUEST;
- KASSERT(npages > 0, ("balloon doesn't need deflating?"));
for (i = 0; i < npages; i++) {
m = TAILQ_FIRST(&sc->vtballoon_pages);
- KASSERT(m != NULL, ("no more pages to deflate"));
+ KASSERT(m != NULL, ("%s: no more pages to deflate", __func__));
sc->vtballoon_page_frames[i] =
VM_PAGE_TO_PHYS(m) >> VIRTIO_BALLOON_PFN_SHIFT;
@@ -385,7 +379,9 @@ vtballoon_deflate(struct vtballoon_softc
KASSERT((TAILQ_EMPTY(&sc->vtballoon_pages) &&
sc->vtballoon_current_npages == 0) ||
(!TAILQ_EMPTY(&sc->vtballoon_pages) &&
- sc->vtballoon_current_npages != 0), ("balloon empty?"));
+ sc->vtballoon_current_npages != 0),
+ ("%s: bogus page count %d", __func__,
+ sc->vtballoon_current_npages));
}
static void
@@ -413,7 +409,7 @@ vtballoon_send_page_frames(struct vtball
*/
VTBALLOON_LOCK(sc);
while ((c = virtqueue_dequeue(vq, NULL)) == NULL)
- msleep_spin(sc, VTBALLOON_MTX(sc), "vtbspf", 0);
+ msleep(sc, VTBALLOON_MTX(sc), 0, "vtbspf", 0);
VTBALLOON_UNLOCK(sc);
KASSERT(c == vq, ("unexpected balloon operation response"));
@@ -512,7 +508,7 @@ vtballoon_sleep(struct vtballoon_softc *
if (current < desired && timeout == 0)
break;
- msleep_spin(sc, VTBALLOON_MTX(sc), "vtbslp", timeout);
+ msleep(sc, VTBALLOON_MTX(sc), 0, "vtbslp", timeout);
}
VTBALLOON_UNLOCK(sc);
@@ -544,7 +540,7 @@ vtballoon_thread(void *xsc)
}
}
- kproc_exit(0);
+ kthread_exit();
}
static void
Modified: stable/9/sys/dev/virtio/block/virtio_blk.c
==============================================================================
--- stable/9/sys/dev/virtio/block/virtio_blk.c Wed Jul 10 01:33:49 2013 (r253131)
+++ stable/9/sys/dev/virtio/block/virtio_blk.c Wed Jul 10 04:51:07 2013 (r253132)
@@ -1,5 +1,5 @@
/*-
- * Copyright (c) 2011, Bryan Venteicher <bryanv at daemoninthecloset.org>
+ * Copyright (c) 2011, Bryan Venteicher <bryanv at FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -36,10 +36,10 @@ __FBSDID("$FreeBSD$");
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/sglist.h>
+#include <sys/sysctl.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/queue.h>
-#include <sys/taskqueue.h>
#include <geom/geom_disk.h>
@@ -62,6 +62,12 @@ struct vtblk_request {
TAILQ_ENTRY(vtblk_request) vbr_link;
};
+enum vtblk_cache_mode {
+ VTBLK_CACHE_WRITETHROUGH,
+ VTBLK_CACHE_WRITEBACK,
+ VTBLK_CACHE_MAX
+};
+
struct vtblk_softc {
device_t vtblk_dev;
struct mtx vtblk_mtx;
@@ -73,6 +79,7 @@ struct vtblk_softc {
#define VTBLK_FLAG_SUSPEND 0x0008
#define VTBLK_FLAG_DUMPING 0x0010
#define VTBLK_FLAG_BARRIER 0x0020
+#define VTBLK_FLAG_WC_CONFIG 0x0040
struct virtqueue *vtblk_vq;
struct sglist *vtblk_sglist;
@@ -85,11 +92,9 @@ struct vtblk_softc {
vtblk_req_ready;
struct vtblk_request *vtblk_req_ordered;
- struct taskqueue *vtblk_tq;
- struct task vtblk_intr_task;
-
int vtblk_max_nsegs;
int vtblk_request_count;
+ enum vtblk_cache_mode vtblk_write_cache;
struct vtblk_request vtblk_dump_request;
};
@@ -102,8 +107,9 @@ static struct virtio_feature_desc vtblk_
{ VIRTIO_BLK_F_RO, "ReadOnly" },
{ VIRTIO_BLK_F_BLK_SIZE, "BlockSize" },
{ VIRTIO_BLK_F_SCSI, "SCSICmds" },
- { VIRTIO_BLK_F_FLUSH, "FlushCmd" },
+ { VIRTIO_BLK_F_WCE, "WriteCache" },
{ VIRTIO_BLK_F_TOPOLOGY, "Topology" },
+ { VIRTIO_BLK_F_CONFIG_WCE, "ConfigWCE" },
{ 0, NULL }
};
@@ -116,6 +122,7 @@ static int vtblk_detach(device_t);
static int vtblk_suspend(device_t);
static int vtblk_resume(device_t);
static int vtblk_shutdown(device_t);
+static int vtblk_config_change(device_t);
static int vtblk_open(struct disk *);
static int vtblk_close(struct disk *);
@@ -128,6 +135,10 @@ static void vtblk_negotiate_features(str
static int vtblk_maximum_segments(struct vtblk_softc *,
struct virtio_blk_config *);
static int vtblk_alloc_virtqueue(struct vtblk_softc *);
+static void vtblk_set_write_cache(struct vtblk_softc *, int);
+static int vtblk_write_cache_enabled(struct vtblk_softc *sc,
+ struct virtio_blk_config *);
+static int vtblk_write_cache_sysctl(SYSCTL_HANDLER_ARGS);
static void vtblk_alloc_disk(struct vtblk_softc *,
struct virtio_blk_config *);
static void vtblk_create_disk(struct vtblk_softc *);
@@ -138,11 +149,12 @@ static struct vtblk_request * vtblk_bio_
static int vtblk_execute_request(struct vtblk_softc *,
struct vtblk_request *);
-static int vtblk_vq_intr(void *);
-static void vtblk_intr_task(void *, int);
+static void vtblk_vq_intr(void *);
static void vtblk_stop(struct vtblk_softc *);
+static void vtblk_read_config(struct vtblk_softc *,
+ struct virtio_blk_config *);
static void vtblk_get_ident(struct vtblk_softc *);
static void vtblk_prepare_dump(struct vtblk_softc *);
static int vtblk_write_dump(struct vtblk_softc *, void *, off_t, size_t);
@@ -167,9 +179,14 @@ static void vtblk_enqueue_ready(struct v
static int vtblk_request_error(struct vtblk_request *);
static void vtblk_finish_bio(struct bio *, int);
+static void vtblk_setup_sysctl(struct vtblk_softc *);
+static int vtblk_tunable_int(struct vtblk_softc *, const char *, int);
+
/* Tunables. */
static int vtblk_no_ident = 0;
TUNABLE_INT("hw.vtblk.no_ident", &vtblk_no_ident);
+static int vtblk_writecache_mode = -1;
+TUNABLE_INT("hw.vtblk.writecache_mode", &vtblk_writecache_mode);
/* Features desired/implemented by this driver. */
#define VTBLK_FEATURES \
@@ -179,13 +196,14 @@ TUNABLE_INT("hw.vtblk.no_ident", &vtblk_
VIRTIO_BLK_F_GEOMETRY | \
VIRTIO_BLK_F_RO | \
VIRTIO_BLK_F_BLK_SIZE | \
- VIRTIO_BLK_F_FLUSH | \
+ VIRTIO_BLK_F_WCE | \
+ VIRTIO_BLK_F_CONFIG_WCE | \
VIRTIO_RING_F_INDIRECT_DESC)
#define VTBLK_MTX(_sc) &(_sc)->vtblk_mtx
#define VTBLK_LOCK_INIT(_sc, _name) \
mtx_init(VTBLK_MTX((_sc)), (_name), \
- "VTBLK Lock", MTX_DEF)
+ "VirtIO Block Lock", MTX_DEF)
#define VTBLK_LOCK(_sc) mtx_lock(VTBLK_MTX((_sc)))
#define VTBLK_UNLOCK(_sc) mtx_unlock(VTBLK_MTX((_sc)))
#define VTBLK_LOCK_DESTROY(_sc) mtx_destroy(VTBLK_MTX((_sc)))
@@ -211,6 +229,9 @@ static device_method_t vtblk_methods[] =
DEVMETHOD(device_resume, vtblk_resume),
DEVMETHOD(device_shutdown, vtblk_shutdown),
+ /* VirtIO methods. */
+ DEVMETHOD(virtio_config_change, vtblk_config_change),
+
DEVMETHOD_END
};
@@ -284,10 +305,13 @@ vtblk_attach(device_t dev)
sc->vtblk_flags |= VTBLK_FLAG_READONLY;
if (virtio_with_feature(dev, VIRTIO_BLK_F_BARRIER))
sc->vtblk_flags |= VTBLK_FLAG_BARRIER;
+ if (virtio_with_feature(dev, VIRTIO_BLK_F_CONFIG_WCE))
+ sc->vtblk_flags |= VTBLK_FLAG_WC_CONFIG;
+
+ vtblk_setup_sysctl(sc);
/* Get local copy of config. */
- virtio_read_device_config(dev, 0, &blkcfg,
- sizeof(struct virtio_blk_config));
+ vtblk_read_config(sc, &blkcfg);
/*
* With the current sglist(9) implementation, it is not easy
@@ -333,24 +357,12 @@ vtblk_attach(device_t dev)
vtblk_alloc_disk(sc, &blkcfg);
- TASK_INIT(&sc->vtblk_intr_task, 0, vtblk_intr_task, sc);
- sc->vtblk_tq = taskqueue_create_fast("vtblk_taskq", M_NOWAIT,
- taskqueue_thread_enqueue, &sc->vtblk_tq);
- if (sc->vtblk_tq == NULL) {
- error = ENOMEM;
- device_printf(dev, "cannot allocate taskqueue\n");
- goto fail;
- }
-
error = virtio_setup_intr(dev, INTR_TYPE_BIO | INTR_ENTROPY);
if (error) {
device_printf(dev, "cannot setup virtqueue interrupt\n");
goto fail;
}
- taskqueue_start_threads(&sc->vtblk_tq, 1, PI_DISK, "%s taskq",
- device_get_nameunit(dev));
-
vtblk_create_disk(sc);
virtqueue_enable_intr(sc->vtblk_vq);
@@ -375,12 +387,6 @@ vtblk_detach(device_t dev)
vtblk_stop(sc);
VTBLK_UNLOCK(sc);
- if (sc->vtblk_tq != NULL) {
- taskqueue_drain(sc->vtblk_tq, &sc->vtblk_intr_task);
- taskqueue_free(sc->vtblk_tq);
- sc->vtblk_tq = NULL;
- }
-
vtblk_drain(sc);
if (sc->vtblk_disk != NULL) {
@@ -441,6 +447,13 @@ vtblk_shutdown(device_t dev)
}
static int
+vtblk_config_change(device_t dev)
+{
+
+ return (0);
+}
+
+static int
vtblk_open(struct disk *dp)
{
struct vtblk_softc *sc;
@@ -541,8 +554,8 @@ vtblk_strategy(struct bio *bp)
max_nsegs = sc->vtblk_max_nsegs - VTBLK_MIN_SEGMENTS;
KASSERT(nsegs <= max_nsegs,
- ("bio %p spanned too many segments: %d, max: %d",
- bp, nsegs, max_nsegs));
+ ("%s: bio %p spanned too many segments: %d, max: %d",
+ __func__, bp, nsegs, max_nsegs));
}
#endif
@@ -606,6 +619,59 @@ vtblk_alloc_virtqueue(struct vtblk_softc
}
static void
+vtblk_set_write_cache(struct vtblk_softc *sc, int wc)
+{
+
+ /* Set either writeback (1) or writethrough (0) mode. */
+ virtio_write_dev_config_1(sc->vtblk_dev,
+ offsetof(struct virtio_blk_config, writeback), wc);
+}
+
+static int
+vtblk_write_cache_enabled(struct vtblk_softc *sc,
+ struct virtio_blk_config *blkcfg)
+{
+ int wc;
+
+ if (sc->vtblk_flags & VTBLK_FLAG_WC_CONFIG) {
+ wc = vtblk_tunable_int(sc, "writecache_mode",
+ vtblk_writecache_mode);
+ if (wc >= 0 && wc < VTBLK_CACHE_MAX)
+ vtblk_set_write_cache(sc, wc);
+ else
+ wc = blkcfg->writeback;
+ } else
+ wc = virtio_with_feature(sc->vtblk_dev, VIRTIO_BLK_F_WCE);
+
+ return (wc);
+}
+
+static int
+vtblk_write_cache_sysctl(SYSCTL_HANDLER_ARGS)
+{
+ struct vtblk_softc *sc;
+ int wc, error;
+
+ sc = oidp->oid_arg1;
+ wc = sc->vtblk_write_cache;
+
+ error = sysctl_handle_int(oidp, &wc, 0, req);
+ if (error || req->newptr == NULL)
+ return (error);
+ if ((sc->vtblk_flags & VTBLK_FLAG_WC_CONFIG) == 0)
+ return (EPERM);
+ if (wc < 0 || wc >= VTBLK_CACHE_MAX)
+ return (EINVAL);
+
+ VTBLK_LOCK(sc);
+ sc->vtblk_write_cache = wc;
+ vtblk_set_write_cache(sc, sc->vtblk_write_cache);
+ VTBLK_UNLOCK(sc);
+
+ return (0);
+}
+
+static void
vtblk_alloc_disk(struct vtblk_softc *sc, struct virtio_blk_config *blkcfg)
{
device_t dev;
@@ -621,6 +687,11 @@ vtblk_alloc_disk(struct vtblk_softc *sc,
dp->d_name = VTBLK_DISK_NAME;
dp->d_unit = device_get_unit(dev);
dp->d_drv1 = sc;
+ dp->d_flags = DISKFLAG_CANFLUSHCACHE;
+ dp->d_hba_vendor = virtio_get_vendor(dev);
+ dp->d_hba_device = virtio_get_device(dev);
+ dp->d_hba_subvendor = virtio_get_subvendor(dev);
+ dp->d_hba_subdevice = virtio_get_subdevice(dev);
if ((sc->vtblk_flags & VTBLK_FLAG_READONLY) == 0)
dp->d_dump = vtblk_dump;
@@ -656,8 +727,18 @@ vtblk_alloc_disk(struct vtblk_softc *sc,
dp->d_fwheads = blkcfg->geometry.heads;
}
- if (virtio_with_feature(dev, VIRTIO_BLK_F_FLUSH))
- dp->d_flags |= DISKFLAG_CANFLUSHCACHE;
+ if (virtio_with_feature(dev, VIRTIO_BLK_F_TOPOLOGY)) {
+ dp->d_stripesize = dp->d_sectorsize *
+ (1 << blkcfg->topology.physical_block_exp);
+ dp->d_stripeoffset = (dp->d_stripesize -
+ blkcfg->topology.alignment_offset * dp->d_sectorsize) %
+ dp->d_stripesize;
+ }
+
+ if (vtblk_write_cache_enabled(sc, blkcfg) != 0)
+ sc->vtblk_write_cache = VTBLK_CACHE_WRITEBACK;
+ else
+ sc->vtblk_write_cache = VTBLK_CACHE_WRITETHROUGH;
}
static void
@@ -765,8 +846,7 @@ vtblk_bio_request(struct vtblk_softc *sc
req->vbr_hdr.sector = bp->bio_offset / 512;
break;
default:
- panic("%s: bio with unhandled cmd: %d", __FUNCTION__,
- bp->bio_cmd);
+ panic("%s: bio with unhandled cmd: %d", __func__, bp->bio_cmd);
}
return (req);
@@ -809,14 +889,13 @@ vtblk_execute_request(struct vtblk_softc
}
sglist_reset(sg);
-
sglist_append(sg, &req->vbr_hdr, sizeof(struct virtio_blk_outhdr));
if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
error = sglist_append(sg, bp->bio_data, bp->bio_bcount);
if (error || sg->sg_nseg == sg->sg_maxseg)
panic("%s: data buffer too big bio:%p error:%d",
- __FUNCTION__, bp, error);
+ __func__, bp, error);
/* BIO_READ means the host writes into our buffer. */
if (bp->bio_cmd == BIO_READ)
@@ -834,28 +913,16 @@ vtblk_execute_request(struct vtblk_softc
return (error);
}
-static int
-vtblk_vq_intr(void *xsc)
-{
- struct vtblk_softc *sc;
-
- sc = xsc;
-
- virtqueue_disable_intr(sc->vtblk_vq);
- taskqueue_enqueue_fast(sc->vtblk_tq, &sc->vtblk_intr_task);
-
- return (1);
-}
-
static void
-vtblk_intr_task(void *arg, int pending)
+vtblk_vq_intr(void *xsc)
{
struct vtblk_softc *sc;
struct virtqueue *vq;
- sc = arg;
+ sc = xsc;
vq = sc->vtblk_vq;
+again:
VTBLK_LOCK(sc);
if (sc->vtblk_flags & VTBLK_FLAG_DETACH) {
VTBLK_UNLOCK(sc);
@@ -872,9 +939,7 @@ vtblk_intr_task(void *arg, int pending)
if (virtqueue_enable_intr(vq) != 0) {
virtqueue_disable_intr(vq);
VTBLK_UNLOCK(sc);
- taskqueue_enqueue_fast(sc->vtblk_tq,
- &sc->vtblk_intr_task);
- return;
+ goto again;
}
VTBLK_UNLOCK(sc);
@@ -888,6 +953,37 @@ vtblk_stop(struct vtblk_softc *sc)
virtio_stop(sc->vtblk_dev);
}
+#define VTBLK_GET_CONFIG(_dev, _feature, _field, _cfg) \
+ if (virtio_with_feature(_dev, _feature)) { \
+ virtio_read_device_config(_dev, \
+ offsetof(struct virtio_blk_config, _field), \
+ &(_cfg)->_field, sizeof((_cfg)->_field)); \
+ }
+
+static void
+vtblk_read_config(struct vtblk_softc *sc, struct virtio_blk_config *blkcfg)
+{
+ device_t dev;
+
+ dev = sc->vtblk_dev;
+
+ bzero(blkcfg, sizeof(struct virtio_blk_config));
+
+ /* The capacity is always available. */
+ virtio_read_device_config(dev, offsetof(struct virtio_blk_config,
+ capacity), &blkcfg->capacity, sizeof(blkcfg->capacity));
+
+ /* Read the configuration if the feature was negotiated. */
+ VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_SIZE_MAX, size_max, blkcfg);
+ VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_SEG_MAX, seg_max, blkcfg);
+ VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_GEOMETRY, geometry, blkcfg);
+ VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_BLK_SIZE, blk_size, blkcfg);
+ VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_TOPOLOGY, topology, blkcfg);
+ VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_CONFIG_WCE, writeback, blkcfg);
+}
+
+#undef VTBLK_GET_CONFIG
+
static void
vtblk_get_ident(struct vtblk_softc *sc)
{
@@ -899,7 +995,7 @@ vtblk_get_ident(struct vtblk_softc *sc)
dp = sc->vtblk_disk;
len = MIN(VIRTIO_BLK_ID_BYTES, DISK_IDENT_SIZE);
- if (vtblk_no_ident != 0)
+ if (vtblk_tunable_int(sc, "no_ident", vtblk_no_ident) != 0)
return;
req = vtblk_dequeue_request(sc);
@@ -949,8 +1045,10 @@ vtblk_prepare_dump(struct vtblk_softc *s
*/
vtblk_drain_vq(sc, 1);
- if (virtio_reinit(dev, sc->vtblk_features) != 0)
- panic("cannot reinit VirtIO block device during dump");
+ if (virtio_reinit(dev, sc->vtblk_features) != 0) {
+ panic("%s: cannot reinit VirtIO block device during dump",
+ device_get_nameunit(dev));
+ }
virtqueue_disable_intr(vq);
virtio_reinit_complete(dev);
@@ -1003,7 +1101,6 @@ static int
vtblk_poll_request(struct vtblk_softc *sc, struct vtblk_request *req)
{
struct virtqueue *vq;
- struct vtblk_request *r;
int error;
vq = sc->vtblk_vq;
@@ -1016,14 +1113,12 @@ vtblk_poll_request(struct vtblk_softc *s
return (error);
virtqueue_notify(vq);
-
- r = virtqueue_poll(vq, NULL);
- KASSERT(r == req, ("unexpected request response: %p/%p", r, req));
+ virtqueue_poll(vq, NULL);
error = vtblk_request_error(req);
if (error && bootverbose) {
device_printf(sc->vtblk_dev,
- "%s: IO error: %d\n", __FUNCTION__, error);
+ "%s: IO error: %d\n", __func__, error);
}
return (error);
@@ -1154,7 +1249,7 @@ vtblk_free_requests(struct vtblk_softc *
struct vtblk_request *req;
KASSERT(TAILQ_EMPTY(&sc->vtblk_req_ready),
- ("ready requests left on queue"));
+ ("%s: ready requests left on queue", __func__));
while ((req = vtblk_dequeue_request(sc)) != NULL) {
sc->vtblk_request_count--;
@@ -1162,7 +1257,7 @@ vtblk_free_requests(struct vtblk_softc *
}
KASSERT(sc->vtblk_request_count == 0,
- ("leaked requests: %d", sc->vtblk_request_count));
+ ("%s: leaked %d requests", __func__, sc->vtblk_request_count));
}
static struct vtblk_request *
@@ -1236,3 +1331,33 @@ vtblk_finish_bio(struct bio *bp, int err
biodone(bp);
}
+
+static void
+vtblk_setup_sysctl(struct vtblk_softc *sc)
+{
+ device_t dev;
+ struct sysctl_ctx_list *ctx;
+ struct sysctl_oid *tree;
+ struct sysctl_oid_list *child;
+
+ dev = sc->vtblk_dev;
+ ctx = device_get_sysctl_ctx(dev);
+ tree = device_get_sysctl_tree(dev);
+ child = SYSCTL_CHILDREN(tree);
+
+ SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "writecache_mode",
+ CTLTYPE_INT | CTLFLAG_RW, sc, 0, vtblk_write_cache_sysctl,
+ "I", "Write cache mode (writethrough (0) or writeback (1))");
+}
+
+static int
+vtblk_tunable_int(struct vtblk_softc *sc, const char *knob, int def)
+{
+ char path[64];
+
+ snprintf(path, sizeof(path),
+ "hw.vtblk.%d.%s", device_get_unit(sc->vtblk_dev), knob);
+ TUNABLE_INT_FETCH(path, &def);
+
+ return (def);
+}
Modified: stable/9/sys/dev/virtio/block/virtio_blk.h
==============================================================================
--- stable/9/sys/dev/virtio/block/virtio_blk.h Wed Jul 10 01:33:49 2013 (r253131)
+++ stable/9/sys/dev/virtio/block/virtio_blk.h Wed Jul 10 04:51:07 2013 (r253132)
@@ -39,8 +39,9 @@
#define VIRTIO_BLK_F_RO 0x0020 /* Disk is read-only */
#define VIRTIO_BLK_F_BLK_SIZE 0x0040 /* Block size of disk is available*/
#define VIRTIO_BLK_F_SCSI 0x0080 /* Supports scsi command passthru */
-#define VIRTIO_BLK_F_FLUSH 0x0200 /* Cache flush command support */
+#define VIRTIO_BLK_F_WCE 0x0200 /* Writeback mode enabled after reset */
#define VIRTIO_BLK_F_TOPOLOGY 0x0400 /* Topology information is available */
+#define VIRTIO_BLK_F_CONFIG_WCE 0x0800 /* Writeback mode available in config */
#define VIRTIO_BLK_ID_BYTES 20 /* ID string length */
@@ -51,15 +52,27 @@ struct virtio_blk_config {
uint32_t size_max;
/* The maximum number of segments (if VIRTIO_BLK_F_SEG_MAX) */
uint32_t seg_max;
- /* geometry the device (if VIRTIO_BLK_F_GEOMETRY) */
+ /* Geometry of the device (if VIRTIO_BLK_F_GEOMETRY) */
struct virtio_blk_geometry {
uint16_t cylinders;
uint8_t heads;
uint8_t sectors;
} geometry;
- /* block size of device (if VIRTIO_BLK_F_BLK_SIZE) */
+ /* Block size of device (if VIRTIO_BLK_F_BLK_SIZE) */
uint32_t blk_size;
+
+ /* Topology of the device (if VIRTIO_BLK_F_TOPOLOGY) */
+ struct virtio_blk_topology {
+ uint8_t physical_block_exp;
+ uint8_t alignment_offset;
+ uint16_t min_io_size;
+ uint16_t opt_io_size;
+ } topology;
+
+ /* Writeback mode (if VIRTIO_BLK_F_CONFIG_WCE) */
+ uint8_t writeback;
+
} __packed;
/*
Modified: stable/9/sys/dev/virtio/network/if_vtnet.c
==============================================================================
--- stable/9/sys/dev/virtio/network/if_vtnet.c Wed Jul 10 01:33:49 2013 (r253131)
+++ stable/9/sys/dev/virtio/network/if_vtnet.c Wed Jul 10 04:51:07 2013 (r253132)
@@ -1,5 +1,5 @@
/*-
- * Copyright (c) 2011, Bryan Venteicher <bryanv at daemoninthecloset.org>
+ * Copyright (c) 2011, Bryan Venteicher <bryanv at FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -42,7 +42,6 @@ __FBSDID("$FreeBSD$");
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
-#include <sys/taskqueue.h>
#include <sys/random.h>
#include <sys/sglist.h>
#include <sys/lock.h>
@@ -97,7 +96,6 @@ static void vtnet_set_hwaddr(struct vtne
static int vtnet_is_link_up(struct vtnet_softc *);
static void vtnet_update_link_status(struct vtnet_softc *);
static void vtnet_watchdog(struct vtnet_softc *);
-static void vtnet_config_change_task(void *, int);
static int vtnet_change_mtu(struct vtnet_softc *, int);
static int vtnet_ioctl(struct ifnet *, u_long, caddr_t);
@@ -123,8 +121,7 @@ static int vtnet_rx_csum(struct vtnet_so
struct virtio_net_hdr *);
static int vtnet_rxeof_merged(struct vtnet_softc *, struct mbuf *, int);
static int vtnet_rxeof(struct vtnet_softc *, int, int *);
-static void vtnet_rx_intr_task(void *, int);
-static int vtnet_rx_vq_intr(void *);
+static void vtnet_rx_vq_intr(void *);
static void vtnet_txeof(struct vtnet_softc *);
static struct mbuf * vtnet_tx_offload(struct vtnet_softc *, struct mbuf *,
@@ -135,8 +132,7 @@ static int vtnet_encap(struct vtnet_soft
static void vtnet_start_locked(struct ifnet *);
static void vtnet_start(struct ifnet *);
static void vtnet_tick(void *);
-static void vtnet_tx_intr_task(void *, int);
-static int vtnet_tx_vq_intr(void *);
+static void vtnet_tx_vq_intr(void *);
static void vtnet_stop(struct vtnet_softc *);
static int vtnet_reinit(struct vtnet_softc *);
@@ -427,19 +423,6 @@ vtnet_attach(device_t dev)
ifp->if_capabilities |= IFCAP_POLLING;
#endif
- TASK_INIT(&sc->vtnet_rx_intr_task, 0, vtnet_rx_intr_task, sc);
- TASK_INIT(&sc->vtnet_tx_intr_task, 0, vtnet_tx_intr_task, sc);
- TASK_INIT(&sc->vtnet_cfgchg_task, 0, vtnet_config_change_task, sc);
-
- sc->vtnet_tq = taskqueue_create_fast("vtnet_taskq", M_NOWAIT,
- taskqueue_thread_enqueue, &sc->vtnet_tq);
- if (sc->vtnet_tq == NULL) {
- error = ENOMEM;
- device_printf(dev, "cannot allocate taskqueue\n");
- ether_ifdetach(ifp);
- goto fail;
- }
-
error = virtio_setup_intr(dev, INTR_TYPE_NET);
if (error) {
device_printf(dev, "cannot setup virtqueue interrupts\n");
@@ -447,9 +430,6 @@ vtnet_attach(device_t dev)
goto fail;
}
- taskqueue_start_threads(&sc->vtnet_tq, 1, PI_NET, "%s taskq",
- device_get_nameunit(dev));
-
/*
* Device defaults to promiscuous mode for backwards
* compatibility. Turn it off if possible.
@@ -495,18 +475,10 @@ vtnet_detach(device_t dev)
VTNET_UNLOCK(sc);
callout_drain(&sc->vtnet_tick_ch);
- taskqueue_drain(taskqueue_fast, &sc->vtnet_cfgchg_task);
ether_ifdetach(ifp);
}
- if (sc->vtnet_tq != NULL) {
- taskqueue_drain(sc->vtnet_tq, &sc->vtnet_rx_intr_task);
- taskqueue_drain(sc->vtnet_tq, &sc->vtnet_tx_intr_task);
- taskqueue_free(sc->vtnet_tq);
- sc->vtnet_tq = NULL;
- }
-
if (sc->vtnet_vlan_attach != NULL) {
EVENTHANDLER_DEREGISTER(vlan_config, sc->vtnet_vlan_attach);
sc->vtnet_vlan_attach = NULL;
@@ -590,9 +562,11 @@ vtnet_config_change(device_t dev)
sc = device_get_softc(dev);
- taskqueue_enqueue_fast(taskqueue_fast, &sc->vtnet_cfgchg_task);
+ VTNET_LOCK(sc);
+ vtnet_update_link_status(sc);
+ VTNET_UNLOCK(sc);
- return (1);
+ return (0);
}
static void
@@ -788,18 +762,6 @@ vtnet_watchdog(struct vtnet_softc *sc)
vtnet_init_locked(sc);
}
-static void
-vtnet_config_change_task(void *arg, int pending)
-{
- struct vtnet_softc *sc;
-
- sc = arg;
-
- VTNET_LOCK(sc);
- vtnet_update_link_status(sc);
- VTNET_UNLOCK(sc);
-}
-
static int
vtnet_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
@@ -1705,15 +1667,16 @@ vtnet_rxeof(struct vtnet_softc *sc, int
}
static void
-vtnet_rx_intr_task(void *arg, int pending)
+vtnet_rx_vq_intr(void *xsc)
{
struct vtnet_softc *sc;
struct ifnet *ifp;
int more;
- sc = arg;
+ sc = xsc;
ifp = sc->vtnet_ifp;
+again:
VTNET_LOCK(sc);
#ifdef DEVICE_POLLING
@@ -1730,31 +1693,15 @@ vtnet_rx_intr_task(void *arg, int pendin
}
more = vtnet_rxeof(sc, sc->vtnet_rx_process_limit, NULL);
- if (!more && vtnet_enable_rx_intr(sc) != 0) {
- vtnet_disable_rx_intr(sc);
- more = 1;
- }
-
- VTNET_UNLOCK(sc);
-
- if (more) {
+ if (more || vtnet_enable_rx_intr(sc) != 0) {
+ if (!more)
+ vtnet_disable_rx_intr(sc);
sc->vtnet_stats.rx_task_rescheduled++;
- taskqueue_enqueue_fast(sc->vtnet_tq,
- &sc->vtnet_rx_intr_task);
+ VTNET_UNLOCK(sc);
+ goto again;
}
-}
-
-static int
-vtnet_rx_vq_intr(void *xsc)
-{
- struct vtnet_softc *sc;
-
- sc = xsc;
- vtnet_disable_rx_intr(sc);
- taskqueue_enqueue_fast(sc->vtnet_tq, &sc->vtnet_rx_intr_task);
-
- return (1);
+ VTNET_UNLOCK(sc);
}
static void
@@ -1800,7 +1747,6 @@ vtnet_tx_offload(struct vtnet_softc *sc,
uint8_t ip_proto, gso_type;
ifp = sc->vtnet_ifp;
- M_ASSERTPKTHDR(m);
ip_offset = sizeof(struct ether_header);
if (m->m_len < ip_offset) {
@@ -1918,7 +1864,7 @@ vtnet_enqueue_txbuf(struct vtnet_softc *
sglist_init(&sg, VTNET_MAX_TX_SEGS, segs);
error = sglist_append(&sg, &txhdr->vth_uhdr, sc->vtnet_hdr_size);
KASSERT(error == 0 && sg.sg_nseg == 1,
- ("cannot add header to sglist"));
+ ("%s: cannot add header to sglist error %d", __func__, error));
again:
error = sglist_append_mbuf(&sg, m);
@@ -1955,6 +1901,7 @@ vtnet_encap(struct vtnet_softc *sc, stru
int error;
m = *m_head;
+ M_ASSERTPKTHDR(m);
txhdr = uma_zalloc(vtnet_tx_header_zone, M_NOWAIT | M_ZERO);
if (txhdr == NULL) {
@@ -2077,14 +2024,15 @@ vtnet_tick(void *xsc)
}
static void
-vtnet_tx_intr_task(void *arg, int pending)
+vtnet_tx_vq_intr(void *xsc)
{
struct vtnet_softc *sc;
struct ifnet *ifp;
- sc = arg;
+ sc = xsc;
ifp = sc->vtnet_ifp;
+again:
VTNET_LOCK(sc);
#ifdef DEVICE_POLLING
@@ -2109,26 +2057,12 @@ vtnet_tx_intr_task(void *arg, int pendin
vtnet_disable_tx_intr(sc);
sc->vtnet_stats.tx_task_rescheduled++;
VTNET_UNLOCK(sc);
- taskqueue_enqueue_fast(sc->vtnet_tq, &sc->vtnet_tx_intr_task);
- return;
+ goto again;
}
VTNET_UNLOCK(sc);
}
-static int
-vtnet_tx_vq_intr(void *xsc)
-{
- struct vtnet_softc *sc;
-
- sc = xsc;
-
- vtnet_disable_tx_intr(sc);
- taskqueue_enqueue_fast(sc->vtnet_tq, &sc->vtnet_tx_intr_task);
-
- return (1);
-}
-
static void
vtnet_stop(struct vtnet_softc *sc)
{
Modified: stable/9/sys/dev/virtio/network/if_vtnetvar.h
==============================================================================
--- stable/9/sys/dev/virtio/network/if_vtnetvar.h Wed Jul 10 01:33:49 2013 (r253131)
+++ stable/9/sys/dev/virtio/network/if_vtnetvar.h Wed Jul 10 04:51:07 2013 (r253132)
@@ -1,5 +1,5 @@
/*-
- * Copyright (c) 2011, Bryan Venteicher <bryanv at daemoninthecloset.org>
+ * Copyright (c) 2011, Bryan Venteicher <bryanv at FreeBSD.org>
* All rights reserved.
*** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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