gpu: gp10b: add gfxp_wfi_timeout sysfs node

Add a sysfs node to allow root user to set PRI_FE_GFXP_WFI_TIMEOUT, for gp10b
only, in units of sysclk cycles. Store the set value in a variable, and write
the set value to register after GPU is un-railgated.

NV_PGRAPH_PRI_FE_GFXP_WFI_TIMEOUT is engine_reset after Bug 1623341.

Change default value to be specified in cycles, rather than time.  This value
is almost the current value in cycles calculated each boot.

Bug 1932782

Change-Id: I0a4207e637cd1413a1be95abe2bcce3adccf76fa
Reviewed-on: https://git-master.nvidia.com/r/1540939
Signed-off-by: Jonathan McCaffrey <jmccaffrey@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1580999
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gr_gk20a.h b/drivers/gpu/nvgpu/gk20a/gr_gk20a.h
index 22fc40d1..0a685d01 100644
--- a/drivers/gpu/nvgpu/gk20a/gr_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gr_gk20a.h
@@ -343,6 +343,7 @@ struct gr_gk20a {
         u32 timeslice_mode;
         u32 czf_bypass;
         u32 pd_max_batches;
+        u32 gfxp_wfi_timeout_count;
 
         struct gr_ctx_buffer_desc global_ctx_buffer[NR_GLOBAL_CTX_BUF];