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authorJack Steiner <steiner@sgi.com>2009-12-15 16:48:09 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-16 07:20:15 -0800
commitb8229bedd1f39799dc83d5c0dad0bd9cd3e5f44c (patch)
tree2e504f7392de859c9df4598e544853e8d7bc81e9
parent7f2251b1bcdd3d2971b2fde3008b270ea11b8780 (diff)
downloadop-kernel-dev-b8229bedd1f39799dc83d5c0dad0bd9cd3e5f44c.zip
op-kernel-dev-b8229bedd1f39799dc83d5c0dad0bd9cd3e5f44c.tar.gz
gru: add debug option for cache flushing
Add a debug option to the SGI GRU driver for flushing GRU cache lines from memory. In theory this is not needed but it is useful for debugging. This has no use by end users. 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>
-rw-r--r--drivers/misc/sgi-gru/grukdump.c13
-rw-r--r--drivers/misc/sgi-gru/grulib.h2
2 files changed, 10 insertions, 5 deletions
diff --git a/drivers/misc/sgi-gru/grukdump.c b/drivers/misc/sgi-gru/grukdump.c
index 55eabfa..9b2062d 100644
--- a/drivers/misc/sgi-gru/grukdump.c
+++ b/drivers/misc/sgi-gru/grukdump.c
@@ -44,7 +44,8 @@ static int gru_user_copy_handle(void __user **dp, void *s)
static int gru_dump_context_data(void *grubase,
struct gru_context_configuration_handle *cch,
- void __user *ubuf, int ctxnum, int dsrcnt)
+ void __user *ubuf, int ctxnum, int dsrcnt,
+ int flush_cbrs)
{
void *cb, *cbe, *tfh, *gseg;
int i, scr;
@@ -55,6 +56,8 @@ static int gru_dump_context_data(void *grubase,
tfh = grubase + GRU_TFH_BASE;
for_each_cbr_in_allocation_map(i, &cch->cbr_allocation_map, scr) {
+ if (flush_cbrs)
+ gru_flush_cache(cb);
if (gru_user_copy_handle(&ubuf, cb))
goto fail;
if (gru_user_copy_handle(&ubuf, tfh + i * GRU_HANDLE_STRIDE))
@@ -115,7 +118,7 @@ fail:
static int gru_dump_context(struct gru_state *gru, int ctxnum,
void __user *ubuf, void __user *ubufend, char data_opt,
- char lock_cch)
+ char lock_cch, char flush_cbrs)
{
struct gru_dump_context_header hdr;
struct gru_dump_context_header __user *uhdr = ubuf;
@@ -159,8 +162,7 @@ static int gru_dump_context(struct gru_state *gru, int ctxnum,
ret = -EFBIG;
else
ret = gru_dump_context_data(grubase, cch, ubuf, ctxnum,
- dsrcnt);
-
+ dsrcnt, flush_cbrs);
}
if (cch_locked)
unlock_cch_handle(cch);
@@ -215,7 +217,8 @@ int gru_dump_chiplet_request(unsigned long arg)
for (ctxnum = 0; ctxnum < GRU_NUM_CCH; ctxnum++) {
if (req.ctxnum == ctxnum || req.ctxnum < 0) {
ret = gru_dump_context(gru, ctxnum, ubuf, ubufend,
- req.data_opt, req.lock_cch);
+ req.data_opt, req.lock_cch,
+ req.flush_cbrs);
if (ret < 0)
goto fail;
ubuf += ret;
diff --git a/drivers/misc/sgi-gru/grulib.h b/drivers/misc/sgi-gru/grulib.h
index e94ee2b..e033b36 100644
--- a/drivers/misc/sgi-gru/grulib.h
+++ b/drivers/misc/sgi-gru/grulib.h
@@ -125,6 +125,8 @@ struct gru_dump_chiplet_state_req {
int ctxnum;
char data_opt;
char lock_cch;
+ char flush_cbrs;
+ char fill[10];
pid_t pid;
void *buf;
size_t buflen;
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