gpu: nvgpu: handle memfmt exception

In gk20a_gr_isr(), handle memfmt exception as below :
- read NV_PGRAPH_PRI_MEMFMT_HWW_ESR
- debug print for contents of above register
- write same value back to NV_PGRAPH_PRI_MEMFMT_HWW_ESR and
  clear the exception

Bug 200078514

Change-Id: I5b9afacd7f99b5a37de953041582b3a53b863642
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/713713
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/hw_gr_gk20a.h b/drivers/gpu/nvgpu/gk20a/hw_gr_gk20a.h
index ff698a51..8fe75614 100644
--- a/drivers/gpu/nvgpu/gk20a/hw_gr_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/hw_gr_gk20a.h
@@ -178,6 +178,10 @@ static inline u32 gr_exception_gpc_m(void)
 {
         return 0x1 << 24;
 }
+static inline u32 gr_exception_memfmt_m(void)
+{
+        return 0x1 << 1;
+}
 static inline u32 gr_exception1_r(void)
 {
         return 0x00400118;