drm/radeon/cik: stop page faults from hanging the system (v2)

Redirect invalid memory accesses to the default page
instead of locking up the memory controller.

v2: rebase on top of 2 level PTs

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index a4e1b95..28a7531 100644 (file)
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -1608,9 +1608,20 @@ static int cik_pcie_gart_enable(struct radeon_device *rdev)
        /* enable context1-15 */
        WREG32(VM_CONTEXT1_PROTECTION_FAULT_DEFAULT_ADDR,
               (u32)(rdev->dummy_page.addr >> 12));
-       WREG32(VM_CONTEXT1_CNTL2, 0);
+       WREG32(VM_CONTEXT1_CNTL2, 4);
        WREG32(VM_CONTEXT1_CNTL, ENABLE_CONTEXT | PAGE_TABLE_DEPTH(1) |
-                               RANGE_PROTECTION_FAULT_ENABLE_DEFAULT);
+                               RANGE_PROTECTION_FAULT_ENABLE_INTERRUPT |
+                               RANGE_PROTECTION_FAULT_ENABLE_DEFAULT |
+                               DUMMY_PAGE_PROTECTION_FAULT_ENABLE_INTERRUPT |
+                               DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT |
+                               PDE0_PROTECTION_FAULT_ENABLE_INTERRUPT |
+                               PDE0_PROTECTION_FAULT_ENABLE_DEFAULT |
+                               VALID_PROTECTION_FAULT_ENABLE_INTERRUPT |
+                               VALID_PROTECTION_FAULT_ENABLE_DEFAULT |
+                               READ_PROTECTION_FAULT_ENABLE_INTERRUPT |
+                               READ_PROTECTION_FAULT_ENABLE_DEFAULT |
+                               WRITE_PROTECTION_FAULT_ENABLE_INTERRUPT |
+                               WRITE_PROTECTION_FAULT_ENABLE_DEFAULT);
 
        /* TC cache setup ??? */
        WREG32(TC_CFG_L1_LOAD_POLICY0, 0);

diff --git a/drivers/gpu/drm/radeon/cikd.h b/drivers/gpu/drm/radeon/cikd.h
index 071a781..0dab9c5 100644 (file)
--- a/drivers/gpu/drm/radeon/cikd.h
+++ b/drivers/gpu/drm/radeon/cikd.h
@@ -68,7 +68,18 @@
 #define VM_CONTEXT0_CNTL                               0x1410
 #define                ENABLE_CONTEXT                                  (1 << 0)
 #define                PAGE_TABLE_DEPTH(x)                             (((x) & 3) << 1)
+#define                RANGE_PROTECTION_FAULT_ENABLE_INTERRUPT         (1 << 3)
 #define                RANGE_PROTECTION_FAULT_ENABLE_DEFAULT           (1 << 4)
+#define                DUMMY_PAGE_PROTECTION_FAULT_ENABLE_INTERRUPT    (1 << 6)
+#define                DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT      (1 << 7)
+#define                PDE0_PROTECTION_FAULT_ENABLE_INTERRUPT          (1 << 9)
+#define                PDE0_PROTECTION_FAULT_ENABLE_DEFAULT            (1 << 10)
+#define                VALID_PROTECTION_FAULT_ENABLE_INTERRUPT         (1 << 12)
+#define                VALID_PROTECTION_FAULT_ENABLE_DEFAULT           (1 << 13)
+#define                READ_PROTECTION_FAULT_ENABLE_INTERRUPT          (1 << 15)
+#define                READ_PROTECTION_FAULT_ENABLE_DEFAULT            (1 << 16)
+#define                WRITE_PROTECTION_FAULT_ENABLE_INTERRUPT         (1 << 18)
+#define                WRITE_PROTECTION_FAULT_ENABLE_DEFAULT           (1 << 19)
 #define VM_CONTEXT1_CNTL                               0x1414
 #define VM_CONTEXT0_CNTL2                              0x1430
 #define VM_CONTEXT1_CNTL2                              0x1434