drm/amdgpu: Add RAS EEPROM table.

Add RAS EEPROM table manager to eanble RAS errors to be stored
upon appearance and retrived on driver load.

v2: Fix some prints.

v3:
Fix checksum calculation.
Make table record and header structs packed to do correct byte value sum.
Fix record crossing EEPROM page boundry.

v4:
Fix byte sum val calculation for record - look at sizeof(record).
Fix some style comments.

v5: Add description to EEPROM_TABLE_RECORD_SIZE and syntax fixes.
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Luben Tuikov <Luben.Tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/Makefile

@@ -54,7 +54,7 @@ amdgpu-y += amdgpu_device.o amdgpu_kms.o \
 	amdgpu_gtt_mgr.o amdgpu_vram_mgr.o amdgpu_virt.o amdgpu_atomfirmware.o \
 	amdgpu_vf_error.o amdgpu_sched.o amdgpu_debugfs.o amdgpu_ids.o \
 	amdgpu_gmc.o amdgpu_xgmi.o amdgpu_csa.o amdgpu_ras.o amdgpu_vm_cpu.o \
-	amdgpu_vm_sdma.o amdgpu_discovery.o
+	amdgpu_vm_sdma.o amdgpu_pmu.o amdgpu_discovery.o amdgpu_ras_eeprom.o
 
 amdgpu-$(CONFIG_PERF_EVENTS) += amdgpu_pmu.o
 

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

@@ -29,6 +29,7 @@
 #include "amdgpu.h"
 #include "amdgpu_psp.h"
 #include "ta_ras_if.h"
+#include "amdgpu_ras_eeprom.h"
 
 enum amdgpu_ras_block {
 	AMDGPU_RAS_BLOCK__UMC = 0,
@@ -333,6 +334,8 @@ struct amdgpu_ras {
 	struct mutex recovery_lock;
 
 	uint32_t flags;
+
+	struct amdgpu_ras_eeprom_control eeprom_control;
 };
 
 struct ras_fs_data {

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

+/*
+ * Copyright 2019 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.
+ *
+ */
+
+#ifndef _AMDGPU_RAS_EEPROM_H
+#define _AMDGPU_RAS_EEPROM_H
+
+#include <linux/i2c.h>
+
+struct amdgpu_device;
+
+enum amdgpu_ras_eeprom_err_type{
+	AMDGPU_RAS_EEPROM_ERR_PLACE_HOLDER,
+	AMDGPU_RAS_EEPROM_ERR_RECOVERABLE,
+	AMDGPU_RAS_EEPROM_ERR_NON_RECOVERABLE
+};
+
+struct amdgpu_ras_eeprom_table_header {
+	uint32_t header;
+	uint32_t version;
+	uint32_t first_rec_offset;
+	uint32_t tbl_size;
+	uint32_t checksum;
+}__attribute__((__packed__));
+
+struct amdgpu_ras_eeprom_control {
+	struct amdgpu_ras_eeprom_table_header tbl_hdr;
+	struct i2c_adapter eeprom_accessor;
+	uint32_t next_addr;
+	unsigned int num_recs;
+	struct mutex tbl_mutex;
+	bool bus_locked;
+	uint32_t tbl_byte_sum;
+};
+
+/*
+ * Represents single table record. Packed to be easily serialized into byte
+ * stream.
+ */
+struct eeprom_table_record {
+
+	union {
+		uint64_t address;
+		uint64_t offset;
+	};
+
+	uint64_t retired_page;
+	uint64_t ts;
+
+	enum amdgpu_ras_eeprom_err_type err_type;
+
+	union {
+		unsigned char bank;
+		unsigned char cu;
+	};
+
+	unsigned char mem_channel;
+	unsigned char mcumc_id;
+}__attribute__((__packed__));
+
+int amdgpu_ras_eeprom_init(struct amdgpu_ras_eeprom_control *control);
+void amdgpu_ras_eeprom_fini(struct amdgpu_ras_eeprom_control *control);
+
+int amdgpu_ras_eeprom_process_recods(struct amdgpu_ras_eeprom_control *control,
+					    struct eeprom_table_record *records,
+					    bool write,
+					    int num);
+
+void amdgpu_ras_eeprom_test(struct amdgpu_ras_eeprom_control *control);
+
+#endif // _AMDGPU_RAS_EEPROM_H