drm/amdgpu: add amdgpu_reg_state.h

This header defines the reg state structures exposed via
sysfs for umr debugging.

v2: add content type

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>

2 files changed, 145 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index ea2656bd714f..0af8ac81facd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -110,6 +110,7 @@
 #include "amdgpu_ras.h"
 #include "amdgpu_xcp.h"
 #include "amdgpu_seq64.h"
+#include "amdgpu_reg_state.h"
 
 #define MAX_GPU_INSTANCE		64
 
@@ -612,6 +613,10 @@ struct amdgpu_asic_funcs {
 				  const struct amdgpu_video_codecs **codecs);
 	/* encode "> 32bits" smn addressing */
 	u64 (*encode_ext_smn_addressing)(int ext_id);
+
+	ssize_t (*get_reg_state)(struct amdgpu_device *adev,
+				 enum amdgpu_reg_state reg_state, void *buf,
+				 size_t max_size);
 };
 
 /*
diff --git a/drivers/gpu/drm/amd/include/amdgpu_reg_state.h b/drivers/gpu/drm/amd/include/amdgpu_reg_state.h
new file mode 100644
index 000000000000..3dbdb118db59
--- /dev/null
+++ b/drivers/gpu/drm/amd/include/amdgpu_reg_state.h
@@ -0,0 +1,140 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright 2023 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_REG_STATE_H__
+#define __AMDGPU_REG_STATE_H__
+
+enum amdgpu_reg_state {
+	AMDGPU_REG_STATE_TYPE_INVALID	= 0,
+	AMDGPU_REG_STATE_TYPE_XGMI	= 1,
+	AMDGPU_REG_STATE_TYPE_WAFL	= 2,
+	AMDGPU_REG_STATE_TYPE_PCIE	= 3,
+	AMDGPU_REG_STATE_TYPE_USR	= 4,
+	AMDGPU_REG_STATE_TYPE_USR_1	= 5
+};
+
+struct amdgpu_reg_state_header {
+	uint16_t		structure_size;
+	uint8_t			format_revision;
+	uint8_t			content_revision;
+	uint8_t			state_type;
+	uint8_t			num_instances;
+	uint16_t		pad;
+};
+
+enum amdgpu_reg_inst_state {
+	AMDGPU_INST_S_OK,
+	AMDGPU_INST_S_EDISABLED,
+	AMDGPU_INST_S_EACCESS,
+};
+
+struct amdgpu_smn_reg_data {
+	uint64_t addr;
+	uint32_t value;
+	uint32_t pad;
+};
+
+struct amdgpu_reg_inst_header {
+	uint16_t	instance;
+	uint16_t	state;
+	uint16_t	num_smn_regs;
+	uint16_t	pad;
+};
+
+
+struct amdgpu_regs_xgmi_v1_0 {
+	struct amdgpu_reg_inst_header	inst_header;
+
+	struct amdgpu_smn_reg_data	smn_reg_values[];
+};
+
+struct amdgpu_reg_state_xgmi_v1_0 {
+	/* common_header.state_type must be AMDGPU_REG_STATE_TYPE_XGMI */
+	struct amdgpu_reg_state_header	common_header;
+
+	struct amdgpu_regs_xgmi_v1_0	xgmi_state_regs[];
+};
+
+struct amdgpu_regs_wafl_v1_0 {
+	struct amdgpu_reg_inst_header	inst_header;
+
+	struct amdgpu_smn_reg_data	smn_reg_values[];
+};
+
+struct amdgpu_reg_state_wafl_v1_0 {
+	/* common_header.state_type must be AMDGPU_REG_STATE_TYPE_WAFL */
+	struct amdgpu_reg_state_header	common_header;
+
+	struct amdgpu_regs_wafl_v1_0	wafl_state_regs[];
+};
+
+struct amdgpu_regs_pcie_v1_0 {
+	struct amdgpu_reg_inst_header	inst_header;
+
+	uint16_t			device_status;
+	uint16_t			link_status;
+	uint32_t			sub_bus_number_latency;
+	uint32_t			pcie_corr_err_status;
+	uint32_t			pcie_uncorr_err_status;
+
+	struct amdgpu_smn_reg_data	smn_reg_values[];
+};
+
+struct amdgpu_reg_state_pcie_v1_0 {
+	/* common_header.state_type must be AMDGPU_REG_STATE_TYPE_PCIE */
+	struct amdgpu_reg_state_header	common_header;
+
+	struct amdgpu_regs_pcie_v1_0	pci_state_regs[];
+};
+
+struct amdgpu_regs_usr_v1_0 {
+	struct amdgpu_reg_inst_header	inst_header;
+
+	struct amdgpu_smn_reg_data	smn_reg_values[];
+};
+
+struct amdgpu_reg_state_usr_v1_0 {
+	/* common_header.state_type must be AMDGPU_REG_STATE_TYPE_USR */
+	struct amdgpu_reg_state_header	common_header;
+
+	struct amdgpu_regs_usr_v1_0	usr_state_regs[];
+};
+
+static inline size_t amdgpu_reginst_size(uint16_t num_inst, size_t inst_size,
+					 uint16_t num_regs)
+{
+	return num_inst *
+	       (inst_size + num_regs * sizeof(struct amdgpu_smn_reg_data));
+}
+
+#define amdgpu_asic_get_reg_state_supported(adev) \
+	((adev)->asic_funcs->get_reg_state ? 1 : 0)
+
+#define amdgpu_asic_get_reg_state(adev, state, buf, size)                  \
+	((adev)->asic_funcs->get_reg_state ?                               \
+		 (adev)->asic_funcs->get_reg_state((adev), (state), (buf), \
+						   (size)) :               \
+		 0)
+
+#endif