[PATCH 2/7] drm/amdgpu: add helpers for hdp ras init/fini

[Li, Dennis]

[AMD Official Use Only - Internal Distribution Only]

>>+	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;
>>+	}

It is better to move amdgpu_ras_is_supported more early, to avoid redundant memory allocation when HDP doesn't support RAS. Except  this, it looks good to me.

Reviewed-by: Dennis Li <Dennis.Li at amd.com>

-----Original Message-----
From: Hawking Zhang <Hawking.Zhang at amd.com> 
Sent: Thursday, April 29, 2021 2:26 PM
To: Deucher, Alexander <Alexander.Deucher at amd.com>; Li, Dennis <Dennis.Li at amd.com>; Clements, John <John.Clements at amd.com>; amd-gfx at lists.freedesktop.org
Cc: Zhang, Hawking <Hawking.Zhang at amd.com>
Subject: [PATCH 2/7] 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 at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/Makefile     |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_hdp.c | 69 +++++++++++++++++++++++++++++++++  drivers/gpu/drm/amd/amdgpu/amdgpu_hdp.h |  2 +
 3 files changed, 72 insertions(+), 1 deletion(-)  create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_hdp.c

diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
index ee85e8a..418e674 100644
--- a/drivers/gpu/drm/amd/amdgpu/Makefile
+++ b/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
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_hdp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_hdp.c
new file mode 100644
index 0000000..1d50d53
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_hdp.c
@@ -0,0 +1,69 @@
+/*
+ * 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;
+	}

It is better to move amdgpu_ras_is_supported more early, to avoid redundant memory allocation when HDP doesn't support RAS. 

+
+	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);
+	}
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_hdp.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_hdp.h
index c89cf8d..ba6f272 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_hdp.h
+++ b/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__ */
--
2.7.4