svn commit: r255006 - in head/sys/dev/cxgbe: . tom
Navdeep Parhar
np at FreeBSD.org
Wed Aug 28 20:59:24 UTC 2013
Author: np
Date: Wed Aug 28 20:59:22 2013
New Revision: 255006
URL: http://svnweb.freebsd.org/changeset/base/255006
Log:
Change t4_list_lock and t4_uld_list_lock from mutexes to sx'es.
- tom_uninit had to be reworked not to hold the adapter lock (a mutex)
around t4_deactivate_uld, which acquires the uld_list_lock.
- the ifc_match for the interface cloner that creates the tracer ifnet
had to be reworked as the kernel calls ifc_match with the global
if_cloners_mtx held.
Modified:
head/sys/dev/cxgbe/t4_main.c
head/sys/dev/cxgbe/t4_tracer.c
head/sys/dev/cxgbe/tom/t4_tom.c
Modified: head/sys/dev/cxgbe/t4_main.c
==============================================================================
--- head/sys/dev/cxgbe/t4_main.c Wed Aug 28 20:45:45 2013 (r255005)
+++ head/sys/dev/cxgbe/t4_main.c Wed Aug 28 20:59:22 2013 (r255006)
@@ -160,10 +160,10 @@ MALLOC_DEFINE(M_CXGBE, "cxgbe", "Chelsio
* Correct lock order when you need to acquire multiple locks is t4_list_lock,
* then ADAPTER_LOCK, then t4_uld_list_lock.
*/
-static struct mtx t4_list_lock;
+static struct sx t4_list_lock;
static SLIST_HEAD(, adapter) t4_list;
#ifdef TCP_OFFLOAD
-static struct mtx t4_uld_list_lock;
+static struct sx t4_uld_list_lock;
static SLIST_HEAD(, uld_info) t4_uld_list;
#endif
@@ -568,9 +568,9 @@ t4_attach(device_t dev)
snprintf(sc->lockname, sizeof(sc->lockname), "%s",
device_get_nameunit(dev));
mtx_init(&sc->sc_lock, sc->lockname, 0, MTX_DEF);
- mtx_lock(&t4_list_lock);
+ sx_xlock(&t4_list_lock);
SLIST_INSERT_HEAD(&t4_list, sc, link);
- mtx_unlock(&t4_list_lock);
+ sx_xunlock(&t4_list_lock);
mtx_init(&sc->sfl_lock, "starving freelists", 0, MTX_DEF);
TAILQ_INIT(&sc->sfl);
@@ -917,9 +917,9 @@ t4_detach(device_t dev)
free(sc->tids.ftid_tab, M_CXGBE);
t4_destroy_dma_tag(sc);
if (mtx_initialized(&sc->sc_lock)) {
- mtx_lock(&t4_list_lock);
+ sx_xlock(&t4_list_lock);
SLIST_REMOVE(&t4_list, sc, adapter, link);
- mtx_unlock(&t4_list_lock);
+ sx_xunlock(&t4_list_lock);
mtx_destroy(&sc->sc_lock);
}
@@ -7341,7 +7341,7 @@ t4_iterate(void (*func)(struct adapter *
{
struct adapter *sc;
- mtx_lock(&t4_list_lock);
+ sx_slock(&t4_list_lock);
SLIST_FOREACH(sc, &t4_list, link) {
/*
* func should not make any assumptions about what state sc is
@@ -7349,7 +7349,7 @@ t4_iterate(void (*func)(struct adapter *
*/
func(sc, arg);
}
- mtx_unlock(&t4_list_lock);
+ sx_sunlock(&t4_list_lock);
}
static int
@@ -7577,7 +7577,7 @@ t4_register_uld(struct uld_info *ui)
int rc = 0;
struct uld_info *u;
- mtx_lock(&t4_uld_list_lock);
+ sx_xlock(&t4_uld_list_lock);
SLIST_FOREACH(u, &t4_uld_list, link) {
if (u->uld_id == ui->uld_id) {
rc = EEXIST;
@@ -7588,7 +7588,7 @@ t4_register_uld(struct uld_info *ui)
SLIST_INSERT_HEAD(&t4_uld_list, ui, link);
ui->refcount = 0;
done:
- mtx_unlock(&t4_uld_list_lock);
+ sx_xunlock(&t4_uld_list_lock);
return (rc);
}
@@ -7598,7 +7598,7 @@ t4_unregister_uld(struct uld_info *ui)
int rc = EINVAL;
struct uld_info *u;
- mtx_lock(&t4_uld_list_lock);
+ sx_xlock(&t4_uld_list_lock);
SLIST_FOREACH(u, &t4_uld_list, link) {
if (u == ui) {
@@ -7613,7 +7613,7 @@ t4_unregister_uld(struct uld_info *ui)
}
}
done:
- mtx_unlock(&t4_uld_list_lock);
+ sx_xunlock(&t4_uld_list_lock);
return (rc);
}
@@ -7625,7 +7625,7 @@ t4_activate_uld(struct adapter *sc, int
ASSERT_SYNCHRONIZED_OP(sc);
- mtx_lock(&t4_uld_list_lock);
+ sx_slock(&t4_uld_list_lock);
SLIST_FOREACH(ui, &t4_uld_list, link) {
if (ui->uld_id == id) {
@@ -7636,7 +7636,7 @@ t4_activate_uld(struct adapter *sc, int
}
}
done:
- mtx_unlock(&t4_uld_list_lock);
+ sx_sunlock(&t4_uld_list_lock);
return (rc);
}
@@ -7649,7 +7649,7 @@ t4_deactivate_uld(struct adapter *sc, in
ASSERT_SYNCHRONIZED_OP(sc);
- mtx_lock(&t4_uld_list_lock);
+ sx_slock(&t4_uld_list_lock);
SLIST_FOREACH(ui, &t4_uld_list, link) {
if (ui->uld_id == id) {
@@ -7660,7 +7660,7 @@ t4_deactivate_uld(struct adapter *sc, in
}
}
done:
- mtx_unlock(&t4_uld_list_lock);
+ sx_sunlock(&t4_uld_list_lock);
return (rc);
}
@@ -7741,10 +7741,10 @@ mod_event(module_t mod, int cmd, void *a
if (atomic_fetchadd_int(&loaded, 1))
break;
t4_sge_modload();
- mtx_init(&t4_list_lock, "T4 adapters", 0, MTX_DEF);
+ sx_init(&t4_list_lock, "T4/T5 adapters");
SLIST_INIT(&t4_list);
#ifdef TCP_OFFLOAD
- mtx_init(&t4_uld_list_lock, "T4 ULDs", 0, MTX_DEF);
+ sx_init(&t4_uld_list_lock, "T4/T5 ULDs");
SLIST_INIT(&t4_uld_list);
#endif
t4_tracer_modload();
@@ -7756,23 +7756,23 @@ mod_event(module_t mod, int cmd, void *a
break;
t4_tracer_modunload();
#ifdef TCP_OFFLOAD
- mtx_lock(&t4_uld_list_lock);
+ sx_slock(&t4_uld_list_lock);
if (!SLIST_EMPTY(&t4_uld_list)) {
rc = EBUSY;
- mtx_unlock(&t4_uld_list_lock);
+ sx_sunlock(&t4_uld_list_lock);
break;
}
- mtx_unlock(&t4_uld_list_lock);
- mtx_destroy(&t4_uld_list_lock);
+ sx_sunlock(&t4_uld_list_lock);
+ sx_destroy(&t4_uld_list_lock);
#endif
- mtx_lock(&t4_list_lock);
+ sx_slock(&t4_list_lock);
if (!SLIST_EMPTY(&t4_list)) {
rc = EBUSY;
- mtx_unlock(&t4_list_lock);
+ sx_sunlock(&t4_list_lock);
break;
}
- mtx_unlock(&t4_list_lock);
- mtx_destroy(&t4_list_lock);
+ sx_sunlock(&t4_list_lock);
+ sx_destroy(&t4_list_lock);
break;
}
Modified: head/sys/dev/cxgbe/t4_tracer.c
==============================================================================
--- head/sys/dev/cxgbe/t4_tracer.c Wed Aug 28 20:45:45 2013 (r255005)
+++ head/sys/dev/cxgbe/t4_tracer.c Wed Aug 28 20:59:22 2013 (r255006)
@@ -121,14 +121,13 @@ match_name(struct adapter *sc, void *arg
static int
t4_cloner_match(struct if_clone *ifc, const char *name)
{
- struct match_rr mrr;
- mrr.name = name;
- mrr.lock = 0;
- mrr.sc = NULL;
- t4_iterate(match_name, &mrr);
-
- return (mrr.sc != NULL);
+ if (strncmp(name, "t4nex", 5) != 0 &&
+ strncmp(name, "t5nex", 5) != 0)
+ return (0);
+ if (name[5] < '0' || name[5] > '9')
+ return (0);
+ return (1);
}
static int
Modified: head/sys/dev/cxgbe/tom/t4_tom.c
==============================================================================
--- head/sys/dev/cxgbe/tom/t4_tom.c Wed Aug 28 20:45:45 2013 (r255005)
+++ head/sys/dev/cxgbe/tom/t4_tom.c Wed Aug 28 20:59:22 2013 (r255006)
@@ -1064,14 +1064,14 @@ t4_tom_mod_load(void)
static void
tom_uninit(struct adapter *sc, void *arg __unused)
{
- if (begin_synchronized_op(sc, NULL, HOLD_LOCK, "t4tomun"))
+ if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4tomun"))
return;
/* Try to free resources (works only if no port has IFCAP_TOE) */
if (sc->flags & TOM_INIT_DONE)
t4_deactivate_uld(sc, ULD_TOM);
- end_synchronized_op(sc, LOCK_HELD);
+ end_synchronized_op(sc, 0);
}
static int
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