drm/amdgpu: gpu recovers from fatal error in poison mode

Fatal error occurs in ras poison mode, mode1 reset
is used to recover gpu.

Signed-off-by: YiPeng Chai <YiPeng.Chai@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: YiPeng Chai

drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c

@@ -2065,6 +2065,14 @@ static void amdgpu_ras_do_recovery(struct work_struct *work)
 				ras->gpu_reset_flags &= ~AMDGPU_RAS_GPU_RESET_MODE2_RESET;
 				reset_context.method = AMD_RESET_METHOD_MODE2;
 			}
+
+			/* Fatal error occurs in poison mode, mode1 reset is used to
+			 * recover gpu.
+			 */
+			if (ras->gpu_reset_flags & AMDGPU_RAS_GPU_RESET_MODE1_RESET) {
+				ras->gpu_reset_flags &= ~AMDGPU_RAS_GPU_RESET_MODE1_RESET;
+				set_bit(AMDGPU_NEED_FULL_RESET, &reset_context.flags);
+			}
 		}
 
 		amdgpu_device_gpu_recover(ras->adev, NULL, &reset_context);
@@ -2955,9 +2963,12 @@ void amdgpu_ras_global_ras_isr(struct amdgpu_device *adev)
 		return;
 
 	if (atomic_cmpxchg(&amdgpu_ras_in_intr, 0, 1) == 0) {
+		struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
+
 		dev_info(adev->dev, "uncorrectable hardware error"
 			"(ERREVENT_ATHUB_INTERRUPT) detected!\n");
 
+		ras->gpu_reset_flags |= AMDGPU_RAS_GPU_RESET_MODE1_RESET;
 		amdgpu_ras_reset_gpu(adev);
 	}
 }

drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h

@@ -340,6 +340,7 @@ enum amdgpu_ras_ret {
 #define AMDGPU_RAS_ERR_ADDRESS_VALID	(1 << 2)
 
 #define AMDGPU_RAS_GPU_RESET_MODE2_RESET  (0x1 << 0)
+#define AMDGPU_RAS_GPU_RESET_MODE1_RESET  (0x1 << 1)
 
 struct amdgpu_ras_err_status_reg_entry {
 	uint32_t hwip;