gpu: nvgpu: gp10b: add ECC support

Add ECC exception handling support for SM, TEX, and LTC.

Bug 1635727
Bug 1637486

Change-Id: I8862ead5784f48742355432ec07c71a82b1b6735
Signed-off-by: Adeel Raza <araza@nvidia.com>
Reviewed-on: http://git-master/r/935362
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
GVS: Gerrit_Virtual_Submit

1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gp10b/ltc_gp10b.c b/drivers/gpu/nvgpu/gp10b/ltc_gp10b.c
index 47992988..d0be86a4 100644
--- a/drivers/gpu/nvgpu/gp10b/ltc_gp10b.c
+++ b/drivers/gpu/nvgpu/gp10b/ltc_gp10b.c
@@ -136,6 +136,20 @@ static void gp10b_ltc_isr(struct gk20a *g)
                         ltc_intr = gk20a_readl(g, ltc_ltc0_lts0_intr_r() +
                                            proj_ltc_stride_v() * ltc +
                                            proj_lts_stride_v() * slice);
+
+                        /* Detect and handle ECC errors */
+                        if (ltc_intr &
+                                ltc_ltcs_ltss_intr_ecc_sec_error_pending_f()) {
+                                gk20a_err(dev_from_gk20a(g),
+                                        "Single bit error detected in GPU L2!");
+                                g->ops.mm.l2_flush(g, true);
+                        }
+                        if (ltc_intr &
+                                ltc_ltcs_ltss_intr_ecc_ded_error_pending_f()) {
+                                gk20a_err(dev_from_gk20a(g),
+                                        "Double bit error detected in GPU L2!");
+                        }
+
                         gk20a_err(dev_from_gk20a(g), "ltc%d, slice %d: %08x",
                                   ltc, slice, ltc_intr);
                         gk20a_writel(g, ltc_ltc0_lts0_intr_r() +
@@ -148,10 +162,19 @@ static void gp10b_ltc_isr(struct gk20a *g)
 
 static void gp10b_ltc_init_fs_state(struct gk20a *g)
 {
+        u32 ltc_intr;
+
         gm20b_ltc_init_fs_state(g);
 
         gk20a_writel(g, ltc_ltca_g_axi_pctrl_r(),
                         ltc_ltca_g_axi_pctrl_user_sid_f(TEGRA_SID_GPUB));
+
+        /* Enable ECC interrupts */
+        ltc_intr = gk20a_readl(g, ltc_ltcs_ltss_intr_r());
+        ltc_intr |= ltc_ltcs_ltss_intr_en_ecc_sec_error_enabled_f() |
+                        ltc_ltcs_ltss_intr_en_ecc_ded_error_enabled_f();
+        gk20a_writel(g, ltc_ltcs_ltss_intr_r(),
+                        ltc_intr);
 }
 
 void gp10b_init_ltc(struct gpu_ops *gops)