gpu: nvgpu: gp106: Disable MMU write violation reporting

Disable reporting of write privilege violation on FB MMU
registers.

Bug 1846641

Change-Id: I011385c5b06bbb2dcc8d4521236a04a8be5dd34e
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1471463
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>

2 files changed, 14 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gp106/fb_gp106.c b/drivers/gpu/nvgpu/gp106/fb_gp106.c
index 53f9af56..dcb7e545 100644
--- a/drivers/gpu/nvgpu/gp106/fb_gp106.c
+++ b/drivers/gpu/nvgpu/gp106/fb_gp106.c
@@ -21,6 +21,8 @@
 
 static void gp106_fb_reset(struct gk20a *g)
 {
+        u32 val;
+
         int retries = HW_SCRUB_TIMEOUT_MAX / HW_SCRUB_TIMEOUT_DEFAULT;
         /* wait for memory to be accessible */
         do {
@@ -31,6 +33,10 @@ static void gp106_fb_reset(struct gk20a *g)
                 }
                 nvgpu_udelay(HW_SCRUB_TIMEOUT_DEFAULT);
         } while (--retries);
+
+        val = gk20a_readl(g, fb_mmu_priv_level_mask_r());
+        val &= ~fb_mmu_priv_level_mask_write_violation_m();
+        gk20a_writel(g, fb_mmu_priv_level_mask_r(), val);
 }
 
 void gp106_init_fb(struct gpu_ops *gops)
diff --git a/drivers/gpu/nvgpu/include/nvgpu/hw/gp106/hw_fb_gp106.h b/drivers/gpu/nvgpu/include/nvgpu/hw/gp106/hw_fb_gp106.h
index 1248e0f3..64b99cf0 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/hw/gp106/hw_fb_gp106.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/hw/gp106/hw_fb_gp106.h
@@ -482,6 +482,14 @@ static inline u32 fb_mmu_vpr_info_fetch_true_v(void)
 {
         return 0x00000001;
 }
+static inline u32 fb_mmu_priv_level_mask_r(void)
+{
+        return 0x00100cdc;
+}
+static inline u32 fb_mmu_priv_level_mask_write_violation_m(void)
+{
+        return 0x1 << 7;
+}
 static inline u32 fb_niso_flush_sysmem_addr_r(void)
 {
         return 0x00100c10;