gpu: nvgpu: gv11b: gfxp wfi timeout

For gv11b, configured gfx preemption wfi timeout in usec.
Set timeout unit as usec in gr_gv11b_init_preemption_state.
Used default timeout as 1msec and this timeout value can
be modified through sysfs node:
/sys/devices/gpu.0/gfxp_wfi_timeout_count

For gp10b:
gfxp_wfi_timeout_count is in syclk cycles

For gv11b:
gfxp_wfi_timeout_count is in usec

Bug 2003668

Change-Id: I68d52ce996a83df90b8b3a8164debb07e5cb370f
Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1599658
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gp10b/gr_gp10b.c b/drivers/gpu/nvgpu/gp10b/gr_gp10b.c
index 27a42a45..c232c4ab 100644
--- a/drivers/gpu/nvgpu/gp10b/gr_gp10b.c
+++ b/drivers/gpu/nvgpu/gp10b/gr_gp10b.c
@@ -46,6 +46,8 @@
 #include <nvgpu/hw/gp10b/hw_mc_gp10b.h>
 #include <nvgpu/hw/gp10b/hw_fuse_gp10b.h>
 
+#define GFXP_WFI_TIMEOUT_COUNT_DEFAULT 100000
+
 bool gr_gp10b_is_valid_class(struct gk20a *g, u32 class_num)
 {
         bool valid = false;
@@ -2351,3 +2353,16 @@ void gr_gp10b_init_ctxsw_hdr_data(struct gk20a *g, struct nvgpu_mem *mem)
         nvgpu_mem_wr(g, mem,
                         ctxsw_prog_main_image_num_cilp_save_ops_o(), 0);
 }
+
+void gr_gp10b_init_gfxp_wfi_timeout_count(struct gk20a *g)
+{
+        struct gr_gk20a *gr = &g->gr;
+
+        gr->gfxp_wfi_timeout_count = GFXP_WFI_TIMEOUT_COUNT_DEFAULT;
+}
+
+unsigned long gr_gp10b_get_max_gfxp_wfi_timeout_count(struct gk20a *g)
+{
+        /* 100msec @ 1GHZ */
+        return (100 * 1000 * 1000UL);
+}