drm/amdgpu: Check SQ_CONFIG register support on SRIOV

On SRIOV environments, check if RLCG supports
SQ_CONFIG register programming.

Signed-off-by: Tony Yi <Tony.Yi@amd.com>
Reviewed-by: Zhigang Luo <zhigang.luo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: tony-amd

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

@@ -152,8 +152,10 @@ enum AMDGIM_REG_ACCESS_FLAG {
 	AMDGIM_FEATURE_MMHUB_REG_RLC_EN   = (1 << 1),
 	/* Use RLC to program GC regs */
 	AMDGIM_FEATURE_GC_REG_RLC_EN      = (1 << 2),
-	/* Use PSP to program L1_TLB_CNTL*/
+	/* Use PSP to program L1_TLB_CNTL */
 	AMDGIM_FEATURE_L1_TLB_CNTL_PSP_EN = (1 << 3),
+	/* Use RLCG to program SQ_CONFIG1 */
+	AMDGIM_FEATURE_REG_ACCESS_SQ_CONFIG = (1 << 4),
 };
 
 struct amdgim_pf2vf_info_v1 {
@@ -346,6 +348,10 @@ struct amdgpu_video_codec_info;
 #define amdgpu_sriov_rlcg_error_report_enabled(adev) \
         (amdgpu_sriov_reg_indirect_mmhub(adev) || amdgpu_sriov_reg_indirect_gc(adev))
 
+#define amdgpu_sriov_reg_access_sq_config(adev) \
+(amdgpu_sriov_vf((adev)) && \
+	((adev)->virt.reg_access & (AMDGIM_FEATURE_REG_ACCESS_SQ_CONFIG)))
+
 #define amdgpu_passthrough(adev) \
 ((adev)->virt.caps & AMDGPU_PASSTHROUGH_MODE)
 

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

@@ -113,7 +113,8 @@ union amd_sriov_reg_access_flags {
 		uint32_t vf_reg_access_mmhub		: 1;
 		uint32_t vf_reg_access_gc		: 1;
 		uint32_t vf_reg_access_l1_tlb_cntl	: 1;
-		uint32_t reserved			: 28;
+		uint32_t vf_reg_access_sq_config	: 1;
+		uint32_t reserved			: 27;
 	} flags;
 	uint32_t all;
 };

drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c

@@ -1351,7 +1351,9 @@ static void gfx_v9_4_3_constants_init(struct amdgpu_device *adev)
 	switch (amdgpu_ip_version(adev, GC_HWIP, 0)) {
 	/* ToDo: GC 9.4.4 */
 	case IP_VERSION(9, 4, 3):
-		if (adev->gfx.mec_fw_version >= 184)
+		if (adev->gfx.mec_fw_version >= 184 &&
+		    (amdgpu_sriov_reg_access_sq_config(adev) ||
+		     !amdgpu_sriov_vf(adev)))
 			adev->gmc.xnack_flags |= AMDGPU_GMC_XNACK_FLAG_CHAIN;
 		break;
 	case IP_VERSION(9, 5, 0):