drm/amdgpu: implement vi ih check/pre/post_soft_reset

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1976,7 +1976,6 @@ int amdgpu_pre_soft_reset(struct amdgpu_device *adev)
 static bool amdgpu_need_full_reset(struct amdgpu_device *adev)
 {
 	if (adev->ip_block_status[AMD_IP_BLOCK_TYPE_GMC].hang ||
-	    adev->ip_block_status[AMD_IP_BLOCK_TYPE_IH].hang ||
 	    adev->ip_block_status[AMD_IP_BLOCK_TYPE_SMC].hang ||
 	    adev->ip_block_status[AMD_IP_BLOCK_TYPE_UVD].hang ||
 	    adev->ip_block_status[AMD_IP_BLOCK_TYPE_VCE].hang ||

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

@@ -70,6 +70,7 @@ struct amdgpu_irq {
 	/* gen irq stuff */
 	struct irq_domain		*domain; /* GPU irq controller domain */
 	unsigned			virq[AMDGPU_MAX_IRQ_SRC_ID];
+	uint32_t                        srbm_soft_reset;
 };
 
 void amdgpu_irq_preinstall(struct drm_device *dev);

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

@@ -373,10 +373,10 @@ static int tonga_ih_wait_for_idle(void *handle)
 	return -ETIMEDOUT;
 }
 
-static int tonga_ih_soft_reset(void *handle)
+static int tonga_ih_check_soft_reset(void *handle)
 {
-	u32 srbm_soft_reset = 0;
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+	u32 srbm_soft_reset = 0;
 	u32 tmp = RREG32(mmSRBM_STATUS);
 
 	if (tmp & SRBM_STATUS__IH_BUSY_MASK)
@@ -384,6 +384,48 @@ static int tonga_ih_soft_reset(void *handle)
 						SOFT_RESET_IH, 1);
 
 	if (srbm_soft_reset) {
+		adev->ip_block_status[AMD_IP_BLOCK_TYPE_IH].hang = true;
+		adev->irq.srbm_soft_reset = srbm_soft_reset;
+	} else {
+		adev->ip_block_status[AMD_IP_BLOCK_TYPE_IH].hang = false;
+		adev->irq.srbm_soft_reset = 0;
+	}
+
+	return 0;
+}
+
+static int tonga_ih_pre_soft_reset(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	if (!adev->ip_block_status[AMD_IP_BLOCK_TYPE_IH].hang)
+		return 0;
+
+	return tonga_ih_hw_fini(adev);
+}
+
+static int tonga_ih_post_soft_reset(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	if (!adev->ip_block_status[AMD_IP_BLOCK_TYPE_IH].hang)
+		return 0;
+
+	return tonga_ih_hw_init(adev);
+}
+
+static int tonga_ih_soft_reset(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+	u32 srbm_soft_reset;
+
+	if (!adev->ip_block_status[AMD_IP_BLOCK_TYPE_IH].hang)
+		return 0;
+	srbm_soft_reset = adev->irq.srbm_soft_reset;
+
+	if (srbm_soft_reset) {
+		u32 tmp;
+
 		tmp = RREG32(mmSRBM_SOFT_RESET);
 		tmp |= srbm_soft_reset;
 		dev_info(adev->dev, "SRBM_SOFT_RESET=0x%08X\n", tmp);
@@ -427,7 +469,10 @@ const struct amd_ip_funcs tonga_ih_ip_funcs = {
 	.resume = tonga_ih_resume,
 	.is_idle = tonga_ih_is_idle,
 	.wait_for_idle = tonga_ih_wait_for_idle,
+	.check_soft_reset = tonga_ih_check_soft_reset,
+	.pre_soft_reset = tonga_ih_pre_soft_reset,
 	.soft_reset = tonga_ih_soft_reset,
+	.post_soft_reset = tonga_ih_post_soft_reset,
 	.set_clockgating_state = tonga_ih_set_clockgating_state,
 	.set_powergating_state = tonga_ih_set_powergating_state,
 };