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authorJack Steiner <steiner@sgi.com>2008-10-16 09:05:13 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-16 22:21:51 +0400
commit923f7f6970bd448b8e88b9e4be10fd01fc7106a4 (patch)
tree5e9f5646f547eaa345068f177815ebadd6a95454 /drivers/misc/sgi-gru/grumain.c
parentebf3f09c634906d371f2bfd71b41c7e0c52efe7e (diff)
downloadlinux-923f7f6970bd448b8e88b9e4be10fd01fc7106a4.tar.xz
GRU driver: minor updates
A few minor updates for the GRU driver. - documentation changes found in code reviews - changes to #ifdefs to make them recognized by "unifdef" (used in simulator testing) - change GRU context load/unload to prefetch data [akpm@linux-foundation.org: fix typo in comment] Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/sgi-gru/grumain.c')
-rw-r--r--drivers/misc/sgi-gru/grumain.c29
1 files changed, 18 insertions, 11 deletions
diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c
index 0eeb8dddd2f5..e11e1ac50900 100644
--- a/drivers/misc/sgi-gru/grumain.c
+++ b/drivers/misc/sgi-gru/grumain.c
@@ -432,29 +432,35 @@ static inline long gru_copy_handle(void *d, void *s)
return GRU_HANDLE_BYTES;
}
-/* rewrite in assembly & use lots of prefetch */
-static void gru_load_context_data(void *save, void *grubase, int ctxnum,
- unsigned long cbrmap, unsigned long dsrmap)
+static void gru_prefetch_context(void *gseg, void *cb, void *cbe, unsigned long cbrmap,
+ unsigned long length)
{
- void *gseg, *cb, *cbe;
- unsigned long length;
int i, scr;
- gseg = grubase + ctxnum * GRU_GSEG_STRIDE;
- length = hweight64(dsrmap) * GRU_DSR_AU_BYTES;
prefetch_data(gseg + GRU_DS_BASE, length / GRU_CACHE_LINE_BYTES,
GRU_CACHE_LINE_BYTES);
- cb = gseg + GRU_CB_BASE;
- cbe = grubase + GRU_CBE_BASE;
for_each_cbr_in_allocation_map(i, &cbrmap, scr) {
prefetch_data(cb, 1, GRU_CACHE_LINE_BYTES);
prefetch_data(cbe + i * GRU_HANDLE_STRIDE, 1,
GRU_CACHE_LINE_BYTES);
cb += GRU_HANDLE_STRIDE;
}
+}
+
+static void gru_load_context_data(void *save, void *grubase, int ctxnum,
+ unsigned long cbrmap, unsigned long dsrmap)
+{
+ void *gseg, *cb, *cbe;
+ unsigned long length;
+ int i, scr;
+ gseg = grubase + ctxnum * GRU_GSEG_STRIDE;
cb = gseg + GRU_CB_BASE;
+ cbe = grubase + GRU_CBE_BASE;
+ length = hweight64(dsrmap) * GRU_DSR_AU_BYTES;
+ gru_prefetch_context(gseg, cb, cbe, cbrmap, length);
+
for_each_cbr_in_allocation_map(i, &cbrmap, scr) {
save += gru_copy_handle(cb, save);
save += gru_copy_handle(cbe + i * GRU_HANDLE_STRIDE, save);
@@ -472,15 +478,16 @@ static void gru_unload_context_data(void *save, void *grubase, int ctxnum,
int i, scr;
gseg = grubase + ctxnum * GRU_GSEG_STRIDE;
-
cb = gseg + GRU_CB_BASE;
cbe = grubase + GRU_CBE_BASE;
+ length = hweight64(dsrmap) * GRU_DSR_AU_BYTES;
+ gru_prefetch_context(gseg, cb, cbe, cbrmap, length);
+
for_each_cbr_in_allocation_map(i, &cbrmap, scr) {
save += gru_copy_handle(save, cb);
save += gru_copy_handle(save, cbe + i * GRU_HANDLE_STRIDE);
cb += GRU_HANDLE_STRIDE;
}
- length = hweight64(dsrmap) * GRU_DSR_AU_BYTES;
memcpy(save, gseg + GRU_DS_BASE, length);
}