drm/amdgpu: Add sysfs interface for vcn reset mask

Add the sysfs interface for vcn:
vcn_reset_mask

The interface is read-only and show the resets supported by the IP.
For example, full adapter reset (mode1/mode2/BACO/etc),
soft reset, queue reset, and pipe reset.

V2: the sysfs node returns a text string instead of some flags (Christian)

V2: the sysfs node returns a text string instead of some flags (Christian)
v3: add a generic helper which takes the ring as parameter
    and print the strings in the order they are applied (Christian)

    check amdgpu_gpu_recovery  before creating sysfs file itself,
    and initialize supported_reset_types in IP version files (Lijo)
v4: s/sdma/vcn/ in the reset mask setup

Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
Suggested-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Tim Huang <tim.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Jie1zhang

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

@@ -1283,3 +1283,38 @@ int amdgpu_vcn_psp_update_sram(struct amdgpu_device *adev, int inst_idx,
 
 	return psp_execute_ip_fw_load(&adev->psp, &ucode);
 }
+
+static ssize_t amdgpu_get_vcn_reset_mask(struct device *dev,
+						struct device_attribute *attr,
+						char *buf)
+{
+	struct drm_device *ddev = dev_get_drvdata(dev);
+	struct amdgpu_device *adev = drm_to_adev(ddev);
+
+	if (!adev)
+		return -ENODEV;
+
+	return amdgpu_show_reset_mask(buf, adev->vcn.supported_reset);
+}
+
+static DEVICE_ATTR(vcn_reset_mask, 0444,
+		   amdgpu_get_vcn_reset_mask, NULL);
+
+int amdgpu_vcn_sysfs_reset_mask_init(struct amdgpu_device *adev)
+{
+	int r = 0;
+
+	if (adev->vcn.num_vcn_inst) {
+		r = device_create_file(adev->dev, &dev_attr_vcn_reset_mask);
+		if (r)
+			return r;
+	}
+
+	return r;
+}
+
+void amdgpu_vcn_sysfs_reset_mask_fini(struct amdgpu_device *adev)
+{
+	if (adev->vcn.num_vcn_inst)
+		device_remove_file(adev->dev, &dev_attr_vcn_reset_mask);
+}

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

@@ -333,6 +333,8 @@ struct amdgpu_vcn {
 
 	/* IP reg dump */
 	uint32_t		*ip_dump;
+
+	uint32_t		supported_reset;
 };
 
 struct amdgpu_fw_shared_rb_ptrs_struct {
@@ -519,5 +521,7 @@ int amdgpu_vcn_ras_sw_init(struct amdgpu_device *adev);
 int amdgpu_vcn_psp_update_sram(struct amdgpu_device *adev, int inst_idx,
 			       enum AMDGPU_UCODE_ID ucode_id);
 int amdgpu_vcn_save_vcpu_bo(struct amdgpu_device *adev);
+int amdgpu_vcn_sysfs_reset_mask_init(struct amdgpu_device *adev);
+void amdgpu_vcn_sysfs_reset_mask_fini(struct amdgpu_device *adev);
 
 #endif

drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c

@@ -225,6 +225,10 @@ static int vcn_v4_0_sw_init(struct amdgpu_ip_block *ip_block)
 		vcn_v4_0_fw_shared_init(adev, i);
 	}
 
+	/* TODO: Add queue reset mask when FW fully supports it */
+	adev->vcn.supported_reset =
+		amdgpu_get_soft_full_reset_mask(&adev->vcn.inst[0].ring_enc[0]);
+
 	if (amdgpu_sriov_vf(adev)) {
 		r = amdgpu_virt_alloc_mm_table(adev);
 		if (r)
@@ -247,6 +251,10 @@ static int vcn_v4_0_sw_init(struct amdgpu_ip_block *ip_block)
 		adev->vcn.ip_dump = ptr;
 	}
 
+	r = amdgpu_vcn_sysfs_reset_mask_init(adev);
+	if (r)
+		return r;
+
 	return 0;
 }
 
@@ -284,6 +292,7 @@ static int vcn_v4_0_sw_fini(struct amdgpu_ip_block *ip_block)
 	if (r)
 		return r;
 
+	amdgpu_vcn_sysfs_reset_mask_fini(adev);
 	r = amdgpu_vcn_sw_fini(adev);
 
 	kfree(adev->vcn.ip_dump);

drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c

@@ -187,6 +187,10 @@ static int vcn_v4_0_3_sw_init(struct amdgpu_ip_block *ip_block)
 			amdgpu_vcn_fwlog_init(&adev->vcn.inst[i]);
 	}
 
+	/* TODO: Add queue reset mask when FW fully supports it */
+	adev->vcn.supported_reset =
+		amdgpu_get_soft_full_reset_mask(&adev->vcn.inst[0].ring_enc[0]);
+
 	if (amdgpu_sriov_vf(adev)) {
 		r = amdgpu_virt_alloc_mm_table(adev);
 		if (r)
@@ -213,6 +217,10 @@ static int vcn_v4_0_3_sw_init(struct amdgpu_ip_block *ip_block)
 		adev->vcn.ip_dump = ptr;
 	}
 
+	r = amdgpu_vcn_sysfs_reset_mask_init(adev);
+	if (r)
+		return r;
+
 	return 0;
 }
 
@@ -246,6 +254,7 @@ static int vcn_v4_0_3_sw_fini(struct amdgpu_ip_block *ip_block)
 	if (r)
 		return r;
 
+	amdgpu_vcn_sysfs_reset_mask_fini(adev);
 	r = amdgpu_vcn_sw_fini(adev);
 
 	kfree(adev->vcn.ip_dump);

drivers/gpu/drm/amd/amdgpu/vcn_v5_0_0.c

@@ -170,6 +170,10 @@ static int vcn_v5_0_0_sw_init(struct amdgpu_ip_block *ip_block)
 			amdgpu_vcn_fwlog_init(&adev->vcn.inst[i]);
 	}
 
+	/* TODO: Add queue reset mask when FW fully supports it */
+	adev->vcn.supported_reset =
+		amdgpu_get_soft_full_reset_mask(&adev->vcn.inst[0].ring_enc[0]);
+
 	if (adev->pg_flags & AMD_PG_SUPPORT_VCN_DPG)
 		adev->vcn.pause_dpg_mode = vcn_v5_0_0_pause_dpg_mode;
 
@@ -181,6 +185,11 @@ static int vcn_v5_0_0_sw_init(struct amdgpu_ip_block *ip_block)
 	} else {
 		adev->vcn.ip_dump = ptr;
 	}
+
+	r = amdgpu_vcn_sysfs_reset_mask_init(adev);
+	if (r)
+		return r;
+
 	return 0;
 }
 
@@ -215,6 +224,7 @@ static int vcn_v5_0_0_sw_fini(struct amdgpu_ip_block *ip_block)
 	if (r)
 		return r;
 
+	amdgpu_vcn_sysfs_reset_mask_fini(adev);
 	r = amdgpu_vcn_sw_fini(adev);
 
 	kfree(adev->vcn.ip_dump);