[Patch 12/29] GRU - Add debug option for cache flushing

steiner
2009-11-24T15:09:09Z

[-- Attachment #1: uv_gru_grudump_flush --]
[-- Type: text/plain, Size: 2701 bytes --]

From: Jack Steiner <steiner@sgi.com>

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>

---
drivers/misc/sgi-gru/grukdump.c | 13 ++++++++-----
drivers/misc/sgi-gru/grulib.h | 2 ++
2 files changed, 10 insertions(+), 5 deletions(-)

Index: linux/drivers/misc/sgi-gru/grukdump.c
===================================================================
--- linux.orig/drivers/misc/sgi-gru/grukdump.c 2009-11-20 09:32:14.000000000 -0600
+++ linux/drivers/misc/sgi-gru/grukdump.c 2009-11-20 09:32:32.000000000 -0600
@@ -44,7 +44,8 @@ static int gru_user_copy_handle(void __u

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 *g
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_s
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 lo
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;
Index: linux/drivers/misc/sgi-gru/grulib.h
===================================================================
--- linux.orig/drivers/misc/sgi-gru/grulib.h 2009-11-20 09:32:28.000000000 -0600
+++ linux/drivers/misc/sgi-gru/grulib.h 2009-11-20 09:32:32.000000000 -0600
@@ -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;