gpu: nvgpu: gv11b: add mmu fault handling

HUB reports following memory sub-system interrupts:
a) ACCESS_COUNTER_NOTIFY:
   GET != PUT for access counter notify buffer
b) ACCESS_COUNTER_ERROR:
   HUB received a NACK (BAR2 fault) when writing the
   notify buffer out to memory
c) MMU_ECC_UNCORRECTED_ERROR_NOTIFY:
   Uncorrected ECC error detected by HUB MMU
d) MMU_REPLAYABLE_FAULT_NOTIFY:
   GET != PUT for replayable fault buffer
e) MMU_REPLAYABLE_FAULT_OVERFLOW:
   Overflow when writing to the replayable fault buffer
f) MMU_NONREPLAYABLE_FAULT_NOTIFY:
   GET != PUT for non-replayable fault buffer
g) MMU_NONREPLAYABLE_FAULT_OVERFLOW:
   Overflow when writing to the non-replayable fault buffer
h) MMU_OTHER_FAULT_NOTIFY: All other fault notifications from MMU

This change is to :
-Detect other fault notify
-Copy fault info from fault snap register for other fault notify
 interrupt
-Detect and handle nonreplay/replay fault notify and fault overflow
-Copy fault info from fault buffer for nonreplay/replay fault
-Print fault info

JIRA GPUT19X-7
JIRA GPUT19X-12

Change-Id: Ifa08a4ebcd119a7d81c2eae3f52dc825d1ce3898
Signed-off-by: Seema Khowala <seemaj@nvidia.com>
Reviewed-on: https://git-master/r/1493394
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
GVS: Gerrit_Virtual_Submit

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gv11b/ce_gv11b.h b/drivers/gpu/nvgpu/gv11b/ce_gv11b.h
index 27dffa5d..09d18058 100644
--- a/drivers/gpu/nvgpu/gv11b/ce_gv11b.h
+++ b/drivers/gpu/nvgpu/gv11b/ce_gv11b.h
@@ -22,5 +22,6 @@
 struct gpu_ops;
 
 void gv11b_init_ce(struct gpu_ops *gops);
+void gv11b_ce_mthd_buffer_fault_in_bar2_fault(struct gk20a *g);
 
 #endif /*__CE2_GV11B_H__*/