drm/amdgpu: add vcn_v4_0_3 ip dump support

Add support of vcn ip dump in the devcoredump
for vcn_v4_0_3.
Signed-off-by: Sunil Khatri <sunil.khatri@amd.com>
Acked-by: Leo Liu <leo.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -45,6 +45,42 @@
 #define VCN_VID_SOC_ADDRESS_2_0		0x1fb00
 #define VCN1_VID_SOC_ADDRESS_3_0	0x48300
 
+static const struct amdgpu_hwip_reg_entry vcn_reg_list_4_0_3[] = {
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_POWER_STATUS),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_STATUS),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_CONTEXT_ID),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_CONTEXT_ID2),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_GPCOM_VCPU_DATA0),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_GPCOM_VCPU_DATA1),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_GPCOM_VCPU_CMD),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_BASE_HI),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_BASE_LO),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_BASE_HI2),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_BASE_LO2),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_BASE_HI3),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_BASE_LO3),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_BASE_HI4),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_BASE_LO4),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_RPTR),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_WPTR),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_RPTR2),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_WPTR2),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_RPTR3),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_WPTR3),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_RPTR4),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_WPTR4),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_SIZE),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_SIZE2),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_SIZE3),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_RB_SIZE4),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_PGFSM_CONFIG),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_PGFSM_STATUS),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_DPG_LMA_CTL),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_DPG_LMA_DATA),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_DPG_LMA_MASK),
+	SOC15_REG_ENTRY_STR(VCN, 0, regUVD_DPG_PAUSE)
+};
+
 #define NORMALIZE_VCN_REG_OFFSET(offset) \
 		(offset & 0x1FFFF)
 
@@ -92,6 +128,8 @@ static int vcn_v4_0_3_sw_init(void *handle)
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 	struct amdgpu_ring *ring;
 	int i, r, vcn_inst;
+	uint32_t reg_count = ARRAY_SIZE(vcn_reg_list_4_0_3);
+	uint32_t *ptr;
 
 	r = amdgpu_vcn_sw_init(adev);
 	if (r)
@@ -159,6 +197,15 @@ static int vcn_v4_0_3_sw_init(void *handle)
 		}
 	}
 
+	/* Allocate memory for VCN IP Dump buffer */
+	ptr = kcalloc(adev->vcn.num_vcn_inst * reg_count, sizeof(uint32_t), GFP_KERNEL);
+	if (!ptr) {
+		DRM_ERROR("Failed to allocate memory for VCN IP Dump\n");
+		adev->vcn.ip_dump = NULL;
+	} else {
+		adev->vcn.ip_dump = ptr;
+	}
+
 	return 0;
 }
 
@@ -194,6 +241,8 @@ static int vcn_v4_0_3_sw_fini(void *handle)
 
 	r = amdgpu_vcn_sw_fini(adev);
 
+	kfree(adev->vcn.ip_dump);
+
 	return r;
 }
 
@@ -1684,6 +1733,36 @@ static void vcn_v4_0_3_set_irq_funcs(struct amdgpu_device *adev)
 	adev->vcn.inst->irq.funcs = &vcn_v4_0_3_irq_funcs;
 }
 
+static void vcn_v4_0_3_dump_ip_state(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+	int i, j;
+	bool is_powered;
+	uint32_t inst_off, inst_id;
+	uint32_t reg_count = ARRAY_SIZE(vcn_reg_list_4_0_3);
+
+	if (!adev->vcn.ip_dump)
+		return;
+
+	for (i = 0; i < adev->vcn.num_vcn_inst; i++) {
+		if (adev->vcn.harvest_config & (1 << i))
+			continue;
+
+		inst_id = GET_INST(VCN, i);
+		inst_off = i * reg_count;
+		/* mmUVD_POWER_STATUS is always readable and is first element of the array */
+		adev->vcn.ip_dump[inst_off] = RREG32_SOC15(VCN, inst_id, regUVD_POWER_STATUS);
+		is_powered = (adev->vcn.ip_dump[inst_off] &
+				UVD_POWER_STATUS__UVD_POWER_STATUS_MASK) != 1;
+
+		if (is_powered)
+			for (j = 1; j < reg_count; j++)
+				adev->vcn.ip_dump[inst_off + j] =
+					RREG32(SOC15_REG_ENTRY_OFFSET_INST(vcn_reg_list_4_0_3[j],
+									   inst_id));
+	}
+}
+
 static const struct amd_ip_funcs vcn_v4_0_3_ip_funcs = {
 	.name = "vcn_v4_0_3",
 	.early_init = vcn_v4_0_3_early_init,
@@ -1702,7 +1781,7 @@ static const struct amd_ip_funcs vcn_v4_0_3_ip_funcs = {
 	.post_soft_reset = NULL,
 	.set_clockgating_state = vcn_v4_0_3_set_clockgating_state,
 	.set_powergating_state = vcn_v4_0_3_set_powergating_state,
-	.dump_ip_state = NULL,
+	.dump_ip_state = vcn_v4_0_3_dump_ip_state,
 	.print_ip_state = NULL,
 };