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Do the first and mostly mechanical step of adding mutex support to the

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bus_dma async callback scheme.  Note that sparc64 does not seem to do
async callbacks.  Note that ia64 callbacks might not be MPSAFE at the
moment.  Note that powerpc doesn't seem to do async callbacks due to
the implementation being incomplete.

Reviewed by:	mostly silence on arch@
This commit is contained in:
scottl 2003-06-27 08:31:48 +00:00
parent 57df706ad1
commit 870f77fed0
4 changed files with 16 additions and 0 deletions
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5
sys/alpha/alpha/busdma_machdep.c
View File

@ -94,6 +94,7 @@ struct bus_dmamap {
vm_offset_t busaddress; /* address in bus space */
bus_dmamap_callback_t *callback;
void *callback_arg;
struct mtx *callback_mtx;
void *sgmaphandle; /* handle into sgmap */
STAILQ_ENTRY(bus_dmamap) links;
};
@ -931,8 +932,12 @@ busdma_swi(void)
while ((map = STAILQ_FIRST(&bounce_map_callbacklist)) != NULL) {
STAILQ_REMOVE_HEAD(&bounce_map_callbacklist, links);
mtx_unlock(&bounce_lock);
if (map->callback_mtx != NULL)
mtx_lock(map->callback_mtx);
bus_dmamap_load(map->dmat, map, map->buf, map->buflen,
map->callback, map->callback_arg, /*flags*/0);
if (map->callback_mtx != NULL)
mtx_unlock(map->callback_mtx);
mtx_lock(&bounce_lock);
}
mtx_unlock(&bounce_lock);

5
sys/i386/i386/busdma_machdep.c
View File

@ -92,6 +92,7 @@ struct bus_dmamap {
bus_size_t buflen; /* unmapped buffer length */
bus_dmamap_callback_t *callback;
void *callback_arg;
struct mtx *callback_mtx;
STAILQ_ENTRY(bus_dmamap) links;
};
@ -869,8 +870,12 @@ busdma_swi(void)
while ((map = STAILQ_FIRST(&bounce_map_callbacklist)) != NULL) {
STAILQ_REMOVE_HEAD(&bounce_map_callbacklist, links);
mtx_unlock(&bounce_lock);
if (map->callback_mtx != NULL)
mtx_lock(map->callback_mtx);
bus_dmamap_load(map->dmat, map, map->buf, map->buflen,
map->callback, map->callback_arg, /*flags*/0);
if (map->callback_mtx != NULL)
mtx_unlock(map->callback_mtx);
mtx_lock(&bounce_lock);
}
mtx_unlock(&bounce_lock);

5
sys/ia64/ia64/busdma_machdep.c
View File

@ -90,6 +90,7 @@ struct bus_dmamap {
vm_offset_t busaddress; /* address in bus space */
bus_dmamap_callback_t *callback;
void *callback_arg;
struct mtx *callback_mtx;
void *sgmaphandle; /* handle into sgmap */
STAILQ_ENTRY(bus_dmamap) links;
};
@ -920,8 +921,12 @@ busdma_swi(void)
while ((map = STAILQ_FIRST(&bounce_map_callbacklist)) != NULL) {
STAILQ_REMOVE_HEAD(&bounce_map_callbacklist, links);
splx(s);
if (map->callback_mtx != NULL)
mtx_lock(map->callback_mtx);
bus_dmamap_load(map->dmat, map, map->buf, map->buflen,
map->callback, map->callback_arg, /*flags*/0);
if (map->callback_mtx != NULL)
mtx_unlock(map->callback_mtx);
s = splhigh();
}
splx(s);

1
sys/powerpc/powerpc/busdma_machdep.c
View File

@ -75,6 +75,7 @@ struct bus_dmamap {
bus_size_t buflen; /* unmapped buffer length */
bus_dmamap_callback_t *callback;
void *callback_arg;
struct mtx *callback_mtx;
};
/*