gpu: nvgpu: support storing/reading single SM error state

Add support to store error state of single SM before
preprocessing SM exception

Error state is stored as :
struct nvgpu_dbg_gpu_sm_error_state_record {
u32 hww_global_esr;
u32 hww_warp_esr;
u64 hww_warp_esr_pc;
u32 hww_global_esr_report_mask;
u32 hww_warp_esr_report_mask;
}

Note that we can safely append new fields to above
structure in the future if required

Also, add IOCTL NVGPU_DBG_GPU_IOCTL_READ_SINGLE_SM_ERROR_STATE
to support reading SM's error state by user space

Bug 200156699

Change-Id: I9a62cb01e8a35c720b52d5d202986347706c7308
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1120329
GVS: Gerrit_Virtual_Submit
Reviewed-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 48aa1524..ab2a975b 100644
--- a/drivers/gpu/nvgpu/gk20a/hw_gr_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/hw_gr_gk20a.h
@@ -2122,6 +2122,10 @@ static inline u32 gr_gpc0_tpc0_sm_cfg_sm_id_f(u32 v)
 {
         return (v & 0xffff) << 0;
 }
+static inline u32 gr_gpc0_tpc0_sm_cfg_sm_id_v(u32 r)
+{
+        return (r >> 0) & 0xffff;
+}
 static inline u32 gr_gpc0_tpc0_sm_arch_r(void)
 {
         return 0x0050469c;