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| author | Scott Long <scottl@FreeBSD.org> | 2003-06-27 08:31:48 +0000 |
|---|---|---|
| committer | Scott Long <scottl@FreeBSD.org> | 2003-06-27 08:31:48 +0000 |
| commit | 3eaffdf7e0b4d44317a944854e06478511484de2 (patch) | |
| tree | 9b3a6384a2c468f145f29baaa1896d43b713513e /sys/alpha | |
| parent | c8cd8ab0170a6a8afad06e2b3e6acaaeb9710d82 (diff) | |
| download | src-3eaffdf7e0b4d44317a944854e06478511484de2.tar.gz src-3eaffdf7e0b4d44317a944854e06478511484de2.zip | |
Do the first and mostly mechanical step of adding mutex support to the
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@
Notes
Notes:
svn path=/head/; revision=116907
Diffstat (limited to 'sys/alpha')
| -rw-r--r-- | sys/alpha/alpha/busdma_machdep.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/alpha/alpha/busdma_machdep.c b/sys/alpha/alpha/busdma_machdep.c index 12f57cde724e..7e5011650c64 100644 --- a/sys/alpha/alpha/busdma_machdep.c +++ b/sys/alpha/alpha/busdma_machdep.c @@ -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); |