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, 34 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gv11b/gr_gv11b.c b/drivers/gpu/nvgpu/gv11b/gr_gv11b.c
index f2397108..9d6d8d05 100644
--- a/drivers/gpu/nvgpu/gv11b/gr_gv11b.c
+++ b/drivers/gpu/nvgpu/gv11b/gr_gv11b.c
@@ -54,6 +54,8 @@
 #include <nvgpu/hw/gv11b/hw_therm_gv11b.h>
 #include <nvgpu/hw/gv11b/hw_fb_gv11b.h>
 
+#define GFXP_WFI_TIMEOUT_COUNT_IN_USEC_DEFAULT 1000
+
 bool gr_gv11b_is_valid_class(struct gk20a *g, u32 class_num)
 {
         bool valid = false;
@@ -3625,3 +3627,35 @@ void gr_gv11b_init_gpc_mmu(struct gk20a *g)
         gk20a_writel(g, gr_gpcs_pri_mmu_debug_rd_r(),
                         gk20a_readl(g, fb_mmu_debug_rd_r()));
 }
+
+int gr_gv11b_init_preemption_state(struct gk20a *g)
+{
+        u32 debug_2;
+        struct gr_gk20a *gr = &g->gr;
+
+        nvgpu_log_fn(g, " ");
+
+        gk20a_writel(g, gr_fe_gfxp_wfi_timeout_r(),
+                        gr_fe_gfxp_wfi_timeout_count_f(
+                        gr->gfxp_wfi_timeout_count));
+
+        debug_2 = gk20a_readl(g, gr_debug_2_r());
+        debug_2 = set_field(debug_2,
+                        gr_debug_2_gfxp_wfi_timeout_unit_m(),
+                        gr_debug_2_gfxp_wfi_timeout_unit_usec_f());
+        gk20a_writel(g, gr_debug_2_r(), debug_2);
+
+        return 0;
+}
+void gr_gv11b_init_gfxp_wfi_timeout_count(struct gk20a *g)
+{
+        struct gr_gk20a *gr = &g->gr;
+
+        gr->gfxp_wfi_timeout_count = GFXP_WFI_TIMEOUT_COUNT_IN_USEC_DEFAULT;
+}
+
+unsigned long gr_gv11b_get_max_gfxp_wfi_timeout_count(struct gk20a *g)
+{
+        /* 100 msec in usec count */
+        return (100 * 1000UL);
+}