drm/amdgpu: Add new PF2VF flags for VF register access method

Add 3 sub flags to notify guest for indirect reg access of
gc, mmhub and ih

The host sets these flags depending on L1 RAP version,
asic and other scenarios. These flags ensure that
there is compatibility between different guest/host/vbios versions.
Signed-off-by: Rohit Khaire <rohit.khaire@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -104,6 +104,17 @@ enum AMDGIM_FEATURE_FLAG {
 	AMDGIM_FEATURE_GIM_MM_BW_MGR = 0x8,
 	/* PP ONE VF MODE in GIM */
 	AMDGIM_FEATURE_PP_ONE_VF = (1 << 4),
+	/* Indirect Reg Access enabled */
+	AMDGIM_FEATURE_INDIRECT_REG_ACCESS = (1 << 5),
+};
+
+enum AMDGIM_REG_ACCESS_FLAG {
+	/* Use PSP to program IH_RB_CNTL */
+	AMDGIM_FEATURE_IH_REG_PSP_EN = (1 << 0),
+	/* Use RLC to program MMHUB regs */
+	AMDGIM_FEATURE_RLC_MMHUB_EN  = (1 << 1),
+	/* Use RLC to program GC regs */
+	AMDGIM_FEATURE_RLC_GC_EN     = (1 << 2),
 };
 
 struct amdgim_pf2vf_info_v1 {

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

@@ -90,11 +90,22 @@ union amd_sriov_msg_feature_flags {
 		uint32_t  host_flr_vramlost  : 1;
 		uint32_t  mm_bw_management   : 1;
 		uint32_t  pp_one_vf_mode     : 1;
-		uint32_t  reserved           : 27;
+		uint32_t  reg_indirect_acc   : 1;
+		uint32_t  reserved           : 26;
 	} flags;
 	uint32_t      all;
 };
 
+union amd_sriov_reg_access_flags {
+	struct {
+		uint32_t vf_reg_access_ih    : 1;
+		uint32_t vf_reg_access_mmhub : 1;
+		uint32_t vf_reg_access_gc    : 1;
+		uint32_t reserved            : 29;
+	} flags;
+	uint32_t all;
+};
+
 union amd_sriov_msg_os_info {
 	struct {
 		uint32_t  windows            : 1;
@@ -149,8 +160,10 @@ struct amd_sriov_msg_pf2vf_info {
 	/* identification in ROCm SMI */
 	uint64_t uuid;
 	uint32_t fcn_idx;
+	/* flags which indicate the register access method VF should use */
+	union amd_sriov_reg_access_flags reg_access_flags;
 	/* reserved */
-	uint32_t reserved[256-26];
+	uint32_t reserved[256-27];
 };
 
 struct amd_sriov_msg_vf2pf_info_header {