drm/amdgpu: added support to get mGPU DRAM base

resolves issue with RAS error injection in mGPU configuration

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: John Clements <john.clements@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 58 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/df_v3_6.c b/drivers/gpu/drm/amd/amdgpu/df_v3_6.c
index f51326598a8c..5a1bd8ed1a6c 100644
--- a/drivers/gpu/drm/amd/amdgpu/df_v3_6.c
+++ b/drivers/gpu/drm/amd/amdgpu/df_v3_6.c
@@ -27,6 +27,9 @@
 #include "df/df_3_6_offset.h"
 #include "df/df_3_6_sh_mask.h"
 
+#define DF_3_6_SMN_REG_INST_DIST        0x8
+#define DF_3_6_INST_CNT                 8
+
 static u32 df_v3_6_channel_number[] = {1, 2, 0, 4, 0, 8, 0,
 				       16, 32, 0, 0, 0, 2, 4, 8};
 
@@ -683,6 +686,58 @@ static void df_v3_6_pmc_get_count(struct amdgpu_device *adev,
 	}
 }
 
+static uint64_t df_v3_6_get_dram_base_addr(struct amdgpu_device *adev,
+					   uint32_t df_inst)
+{
+	uint32_t base_addr_reg_val 	= 0;
+	uint64_t base_addr	 	= 0;
+
+	base_addr_reg_val = RREG32_PCIE(smnDF_CS_UMC_AON0_DramBaseAddress0 +
+					df_inst * DF_3_6_SMN_REG_INST_DIST);
+
+	if (REG_GET_FIELD(base_addr_reg_val,
+			  DF_CS_UMC_AON0_DramBaseAddress0,
+			  AddrRngVal) == 0) {
+		DRM_WARN("address range not valid");
+		return 0;
+	}
+
+	base_addr = REG_GET_FIELD(base_addr_reg_val,
+				  DF_CS_UMC_AON0_DramBaseAddress0,
+				  DramBaseAddr);
+
+	return base_addr << 28;
+}
+
+static uint32_t df_v3_6_get_df_inst_id(struct amdgpu_device *adev)
+{
+	uint32_t xgmi_node_id	= 0;
+	uint32_t df_inst_id 	= 0;
+
+	/* Walk through DF dst nodes to find current XGMI node */
+	for (df_inst_id = 0; df_inst_id < DF_3_6_INST_CNT; df_inst_id++) {
+
+		xgmi_node_id = RREG32_PCIE(smnDF_CS_UMC_AON0_DramLimitAddress0 +
+					   df_inst_id * DF_3_6_SMN_REG_INST_DIST);
+		xgmi_node_id = REG_GET_FIELD(xgmi_node_id,
+					     DF_CS_UMC_AON0_DramLimitAddress0,
+					     DstFabricID);
+
+		/* TODO: establish reason dest fabric id is offset by 7 */
+		xgmi_node_id = xgmi_node_id >> 7;
+
+		if (adev->gmc.xgmi.physical_node_id == xgmi_node_id)
+			break;
+	}
+
+	if (df_inst_id == DF_3_6_INST_CNT) {
+		DRM_WARN("cant match df dst id with gpu node");
+		return 0;
+	}
+
+	return df_inst_id;
+}
+
 const struct amdgpu_df_funcs df_v3_6_funcs = {
 	.sw_init = df_v3_6_sw_init,
 	.sw_fini = df_v3_6_sw_fini,
@@ -696,5 +751,7 @@ const struct amdgpu_df_funcs df_v3_6_funcs = {
 	.pmc_stop = df_v3_6_pmc_stop,
 	.pmc_get_count = df_v3_6_pmc_get_count,
 	.get_fica = df_v3_6_get_fica,
-	.set_fica = df_v3_6_set_fica
+	.set_fica = df_v3_6_set_fica,
+	.get_dram_base_addr = df_v3_6_get_dram_base_addr,
+	.get_df_inst_id = df_v3_6_get_df_inst_id
 };