drm/amdgpu: add helpers for hdp ras init/fini

hdp ras init/fini are common functions that
can be shared among hdp generations
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: John Clements <John.Clements@amd.com>
Reviewed-by: Dennis Li <Dennis.Li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/Makefile

@@ -56,7 +56,7 @@ amdgpu-y += amdgpu_device.o amdgpu_kms.o \
 	amdgpu_gmc.o amdgpu_mmhub.o amdgpu_xgmi.o amdgpu_csa.o amdgpu_ras.o amdgpu_vm_cpu.o \
 	amdgpu_vm_sdma.o amdgpu_discovery.o amdgpu_ras_eeprom.o amdgpu_nbio.o \
 	amdgpu_umc.o smu_v11_0_i2c.o amdgpu_fru_eeprom.o amdgpu_rap.o \
-	amdgpu_fw_attestation.o amdgpu_securedisplay.o
+	amdgpu_fw_attestation.o amdgpu_securedisplay.o amdgpu_hdp.o
 
 amdgpu-$(CONFIG_PERF_EVENTS) += amdgpu_pmu.o
 

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

+/*
+ * Copyright 2021 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include "amdgpu.h"
+#include "amdgpu_ras.h"
+
+int amdgpu_hdp_ras_late_init(struct amdgpu_device *adev)
+{
+	int r;
+	struct ras_ih_if ih_info = {
+		.cb = NULL,
+	};
+	struct ras_fs_if fs_info = {
+		.sysfs_name = "hdp_err_count",
+	};
+
+	if (!adev->hdp.ras_if) {
+		adev->hdp.ras_if = kmalloc(sizeof(struct ras_common_if), GFP_KERNEL);
+		if (!adev->hdp.ras_if)
+			return -ENOMEM;
+		adev->hdp.ras_if->block = AMDGPU_RAS_BLOCK__HDP;
+		adev->hdp.ras_if->type = AMDGPU_RAS_ERROR__MULTI_UNCORRECTABLE;
+		adev->hdp.ras_if->sub_block_index = 0;
+		strcpy(adev->hdp.ras_if->name, "hdp");
+	}
+	ih_info.head = fs_info.head = *adev->hdp.ras_if;
+	r = amdgpu_ras_late_init(adev, adev->hdp.ras_if,
+				 &fs_info, &ih_info);
+	if (r || !amdgpu_ras_is_supported(adev, adev->hdp.ras_if->block)) {
+		kfree(adev->hdp.ras_if);
+		adev->hdp.ras_if = NULL;
+	}
+
+	return r;
+}
+
+void amdgpu_hdp_ras_fini(struct amdgpu_device *adev)
+{
+	if (amdgpu_ras_is_supported(adev, AMDGPU_RAS_BLOCK__HDP) &&
+	    adev->hdp.ras_if) {
+		struct ras_common_if *ras_if = adev->hdp.ras_if;
+		struct ras_ih_if ih_info = {
+			.cb = NULL,
+		};
+
+		amdgpu_ras_late_fini(adev, ras_if, &ih_info);
+		kfree(ras_if);
+	}
+}

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

@@ -47,4 +47,6 @@ struct amdgpu_hdp {
 	const struct amdgpu_hdp_ras_funcs	*ras_funcs;
 };
 
+int amdgpu_hdp_ras_late_init(struct amdgpu_device *adev);
+void amdgpu_hdp_ras_fini(struct amdgpu_device *adev);
 #endif /* __AMDGPU_HDP_H__ */