gpu: nvgpu: add sked exception detection and handling

Needed to detect and clear sked exception

Bug 200315442

Change-Id: Ia85e8827e563addf7b9d0f95ef192379bb808638
Signed-off-by: Seema Khowala <seemaj@nvidia.com>
Reviewed-on: http://git-master/r/1500860
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

2 files changed, 12 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
index 462af65f..0fd27598 100644
--- a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
@@ -6598,6 +6598,14 @@ int gk20a_gr_isr(struct gk20a *g)
                         need_reset |= -EFAULT;
                 }
 
+                if (exception & gr_exception_sked_m()) {
+                        u32 sked = gk20a_readl(g, gr_sked_hww_esr_r());
+
+                        nvgpu_err(g, "sked exception %08x", sked);
+                        gk20a_writel(g, gr_sked_hww_esr_r(),
+                                gr_sked_hww_esr_reset_active_f());
+                }
+
                 gk20a_writel(g, gr_intr_r(), gr_intr_exception_reset_f());
                 gr_intr &= ~gr_intr_exception_pending_f();
 
diff --git a/drivers/gpu/nvgpu/include/nvgpu/hw/gk20a/hw_gr_gk20a.h b/drivers/gpu/nvgpu/include/nvgpu/hw/gk20a/hw_gr_gk20a.h
index 455eef90..983f1cfe 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/hw/gk20a/hw_gr_gk20a.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/hw/gk20a/hw_gr_gk20a.h
@@ -186,6 +186,10 @@ static inline u32 gr_exception_ds_m(void)
 {
         return 0x1 << 4;
 }
+static inline u32 gr_exception_sked_m(void)
+{
+        return 0x1 << 8;
+}
 static inline u32 gr_exception1_r(void)
 {
         return 0x00400118;