drm/amdgpu: save and restore gc hub regs

Save and restore gfxhub regs as they will be reset during mode 2
Signed-off-by: Victor Zhao <Victor.Zhao@amd.com>
Acked-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -35,6 +35,8 @@ struct amdgpu_gfxhub_funcs {
 	void (*init)(struct amdgpu_device *adev);
 	int (*get_xgmi_info)(struct amdgpu_device *adev);
 	void (*utcl2_harvest)(struct amdgpu_device *adev);
+	void (*mode2_save_regs)(struct amdgpu_device *adev);
+	void (*mode2_restore_regs)(struct amdgpu_device *adev);
 };
 
 struct amdgpu_gfxhub {

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

@@ -264,6 +264,32 @@ struct amdgpu_gmc {
 	u64 mall_size;
 	/* number of UMC instances */
 	int num_umc;
+	/* mode2 save restore */
+	u64 VM_L2_CNTL;
+	u64 VM_L2_CNTL2;
+	u64 VM_DUMMY_PAGE_FAULT_CNTL;
+	u64 VM_DUMMY_PAGE_FAULT_ADDR_LO32;
+	u64 VM_DUMMY_PAGE_FAULT_ADDR_HI32;
+	u64 VM_L2_PROTECTION_FAULT_CNTL;
+	u64 VM_L2_PROTECTION_FAULT_CNTL2;
+	u64 VM_L2_PROTECTION_FAULT_MM_CNTL3;
+	u64 VM_L2_PROTECTION_FAULT_MM_CNTL4;
+	u64 VM_L2_PROTECTION_FAULT_ADDR_LO32;
+	u64 VM_L2_PROTECTION_FAULT_ADDR_HI32;
+	u64 VM_DEBUG;
+	u64 VM_L2_MM_GROUP_RT_CLASSES;
+	u64 VM_L2_BANK_SELECT_RESERVED_CID;
+	u64 VM_L2_BANK_SELECT_RESERVED_CID2;
+	u64 VM_L2_CACHE_PARITY_CNTL;
+	u64 VM_L2_IH_LOG_CNTL;
+	u64 VM_CONTEXT_CNTL[16];
+	u64 VM_CONTEXT_PAGE_TABLE_BASE_ADDR_LO32[16];
+	u64 VM_CONTEXT_PAGE_TABLE_BASE_ADDR_HI32[16];
+	u64 VM_CONTEXT_PAGE_TABLE_START_ADDR_LO32[16];
+	u64 VM_CONTEXT_PAGE_TABLE_START_ADDR_HI32[16];
+	u64 VM_CONTEXT_PAGE_TABLE_END_ADDR_LO32[16];
+	u64 VM_CONTEXT_PAGE_TABLE_END_ADDR_HI32[16];
+	u64 MC_VM_MX_L1_TLB_CNTL;
 };
 
 #define amdgpu_gmc_flush_gpu_tlb(adev, vmid, vmhub, type) ((adev)->gmc.gmc_funcs->flush_gpu_tlb((adev), (vmid), (vmhub), (type)))

drivers/gpu/drm/amd/amdgpu/gfxhub_v2_1.c

@@ -576,6 +576,76 @@ static void gfxhub_v2_1_utcl2_harvest(struct amdgpu_device *adev)
 	}
 }
 
+static void gfxhub_v2_1_save_regs(struct amdgpu_device *adev)
+{
+	int i;
+	adev->gmc.VM_L2_CNTL = RREG32_SOC15(GC, 0, mmGCVM_L2_CNTL);
+	adev->gmc.VM_L2_CNTL2 = RREG32_SOC15(GC, 0, mmGCVM_L2_CNTL2);
+	adev->gmc.VM_DUMMY_PAGE_FAULT_CNTL = RREG32_SOC15(GC, 0, mmGCVM_DUMMY_PAGE_FAULT_CNTL);
+	adev->gmc.VM_DUMMY_PAGE_FAULT_ADDR_LO32 = RREG32_SOC15(GC, 0, mmGCVM_DUMMY_PAGE_FAULT_ADDR_LO32);
+	adev->gmc.VM_DUMMY_PAGE_FAULT_ADDR_HI32 = RREG32_SOC15(GC, 0, mmGCVM_DUMMY_PAGE_FAULT_ADDR_HI32);
+	adev->gmc.VM_L2_PROTECTION_FAULT_CNTL = RREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_CNTL);
+	adev->gmc.VM_L2_PROTECTION_FAULT_CNTL2 = RREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_CNTL2);
+	adev->gmc.VM_L2_PROTECTION_FAULT_MM_CNTL3 = RREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_MM_CNTL3);
+	adev->gmc.VM_L2_PROTECTION_FAULT_MM_CNTL4 = RREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_MM_CNTL4);
+	adev->gmc.VM_L2_PROTECTION_FAULT_ADDR_LO32 = RREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_ADDR_LO32);
+	adev->gmc.VM_L2_PROTECTION_FAULT_ADDR_HI32 = RREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_ADDR_HI32);
+	adev->gmc.VM_DEBUG = RREG32_SOC15(GC, 0, mmGCVM_DEBUG);
+	adev->gmc.VM_L2_MM_GROUP_RT_CLASSES = RREG32_SOC15(GC, 0, mmGCVM_L2_MM_GROUP_RT_CLASSES);
+	adev->gmc.VM_L2_BANK_SELECT_RESERVED_CID = RREG32_SOC15(GC, 0, mmGCVM_L2_BANK_SELECT_RESERVED_CID);
+	adev->gmc.VM_L2_BANK_SELECT_RESERVED_CID2 = RREG32_SOC15(GC, 0, mmGCVM_L2_BANK_SELECT_RESERVED_CID2);
+	adev->gmc.VM_L2_CACHE_PARITY_CNTL = RREG32_SOC15(GC, 0, mmGCVM_L2_CACHE_PARITY_CNTL);
+	adev->gmc.VM_L2_IH_LOG_CNTL = RREG32_SOC15(GC, 0, mmGCVM_L2_IH_LOG_CNTL);
+
+	for (i = 0; i <= 15; i++) {
+		adev->gmc.VM_CONTEXT_CNTL[i] = RREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_CNTL, i);
+		adev->gmc.VM_CONTEXT_PAGE_TABLE_BASE_ADDR_LO32[i] = RREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32, i * 2);
+		adev->gmc.VM_CONTEXT_PAGE_TABLE_BASE_ADDR_HI32[i] = RREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32, i * 2);
+		adev->gmc.VM_CONTEXT_PAGE_TABLE_START_ADDR_LO32[i] = RREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_START_ADDR_LO32, i * 2);
+		adev->gmc.VM_CONTEXT_PAGE_TABLE_START_ADDR_HI32[i] = RREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_START_ADDR_HI32, i * 2);
+		adev->gmc.VM_CONTEXT_PAGE_TABLE_END_ADDR_LO32[i] = RREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_END_ADDR_LO32, i * 2);
+		adev->gmc.VM_CONTEXT_PAGE_TABLE_END_ADDR_HI32[i] = RREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_END_ADDR_HI32, i * 2);
+	}
+
+	adev->gmc.MC_VM_MX_L1_TLB_CNTL = RREG32_SOC15(GC, 0, mmGCMC_VM_MX_L1_TLB_CNTL);
+}
+
+static void gfxhub_v2_1_restore_regs(struct amdgpu_device *adev)
+{
+	int i;
+	WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL, adev->gmc.VM_L2_CNTL);
+	WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL2, adev->gmc.VM_L2_CNTL2);
+	WREG32_SOC15(GC, 0, mmGCVM_DUMMY_PAGE_FAULT_CNTL, adev->gmc.VM_DUMMY_PAGE_FAULT_CNTL);
+	WREG32_SOC15(GC, 0, mmGCVM_DUMMY_PAGE_FAULT_ADDR_LO32, adev->gmc.VM_DUMMY_PAGE_FAULT_ADDR_LO32);
+	WREG32_SOC15(GC, 0, mmGCVM_DUMMY_PAGE_FAULT_ADDR_HI32, adev->gmc.VM_DUMMY_PAGE_FAULT_ADDR_HI32);
+	WREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_CNTL, adev->gmc.VM_L2_PROTECTION_FAULT_CNTL);
+	WREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_CNTL2, adev->gmc.VM_L2_PROTECTION_FAULT_CNTL2);
+	WREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_MM_CNTL3, adev->gmc.VM_L2_PROTECTION_FAULT_MM_CNTL3);
+	WREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_MM_CNTL4, adev->gmc.VM_L2_PROTECTION_FAULT_MM_CNTL4);
+	WREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_ADDR_LO32, adev->gmc.VM_L2_PROTECTION_FAULT_ADDR_LO32);
+	WREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_ADDR_HI32, adev->gmc.VM_L2_PROTECTION_FAULT_ADDR_HI32);
+	WREG32_SOC15(GC, 0, mmGCVM_DEBUG, adev->gmc.VM_DEBUG);
+	WREG32_SOC15(GC, 0, mmGCVM_L2_MM_GROUP_RT_CLASSES, adev->gmc.VM_L2_MM_GROUP_RT_CLASSES);
+	WREG32_SOC15(GC, 0, mmGCVM_L2_BANK_SELECT_RESERVED_CID, adev->gmc.VM_L2_BANK_SELECT_RESERVED_CID);
+	WREG32_SOC15(GC, 0, mmGCVM_L2_BANK_SELECT_RESERVED_CID2, adev->gmc.VM_L2_BANK_SELECT_RESERVED_CID2);
+	WREG32_SOC15(GC, 0, mmGCVM_L2_CACHE_PARITY_CNTL, adev->gmc.VM_L2_CACHE_PARITY_CNTL);
+	WREG32_SOC15(GC, 0, mmGCVM_L2_IH_LOG_CNTL, adev->gmc.VM_L2_IH_LOG_CNTL);
+
+	for (i = 0; i <= 15; i++) {
+		WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_CNTL, i, adev->gmc.VM_CONTEXT_CNTL[i]);
+		WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32, i * 2, adev->gmc.VM_CONTEXT_PAGE_TABLE_BASE_ADDR_LO32[i]);
+		WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32, i * 2, adev->gmc.VM_CONTEXT_PAGE_TABLE_BASE_ADDR_HI32[i]);
+		WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_START_ADDR_LO32, i * 2, adev->gmc.VM_CONTEXT_PAGE_TABLE_START_ADDR_LO32[i]);
+		WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_START_ADDR_HI32, i * 2, adev->gmc.VM_CONTEXT_PAGE_TABLE_START_ADDR_HI32[i]);
+		WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_END_ADDR_LO32, i * 2, adev->gmc.VM_CONTEXT_PAGE_TABLE_END_ADDR_LO32[i]);
+		WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_END_ADDR_HI32, i * 2, adev->gmc.VM_CONTEXT_PAGE_TABLE_END_ADDR_HI32[i]);
+	}
+
+	WREG32_SOC15(GC, 0, mmGCMC_VM_FB_LOCATION_BASE, adev->gmc.vram_start >> 24);
+	WREG32_SOC15(GC, 0, mmGCMC_VM_FB_LOCATION_TOP, adev->gmc.vram_end >> 24);
+	WREG32_SOC15(GC, 0, mmGCMC_VM_MX_L1_TLB_CNTL, adev->gmc.MC_VM_MX_L1_TLB_CNTL);
+}
+
 const struct amdgpu_gfxhub_funcs gfxhub_v2_1_funcs = {
 	.get_fb_location = gfxhub_v2_1_get_fb_location,
 	.get_mc_fb_offset = gfxhub_v2_1_get_mc_fb_offset,
@@ -586,4 +656,6 @@ const struct amdgpu_gfxhub_funcs gfxhub_v2_1_funcs = {
 	.init = gfxhub_v2_1_init,
 	.get_xgmi_info = gfxhub_v2_1_get_xgmi_info,
 	.utcl2_harvest = gfxhub_v2_1_utcl2_harvest,
+	.mode2_save_regs = gfxhub_v2_1_save_regs,
+	.mode2_restore_regs = gfxhub_v2_1_restore_regs,
 };

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

@@ -94,8 +94,11 @@ sienna_cichlid_mode2_prepare_hwcontext(struct amdgpu_reset_control *reset_ctl,
 	int r = 0;
 	struct amdgpu_device *adev = (struct amdgpu_device *)reset_ctl->handle;
 
-	if (!amdgpu_sriov_vf(adev))
+	if (!amdgpu_sriov_vf(adev)) {
+		if (adev->gfxhub.funcs->mode2_save_regs)
+			adev->gfxhub.funcs->mode2_save_regs(adev);
 		r = sienna_cichlid_mode2_suspend_ip(adev);
+	}
 
 	return r;
 }
@@ -151,6 +154,8 @@ static int sienna_cichlid_mode2_restore_ip(struct amdgpu_device *adev)
 	}
 
 	/* Reinit GFXHUB */
+	if (adev->gfxhub.funcs->mode2_restore_regs)
+		adev->gfxhub.funcs->mode2_restore_regs(adev);
 	adev->gfxhub.funcs->init(adev);
 	r = adev->gfxhub.funcs->gart_enable(adev);
 	if (r) {

drivers/gpu/drm/amd/include/asic_reg/gc/gc_10_3_0_offset.h

@@ -3129,6 +3129,8 @@
 #define mmGCVM_L2_PROTECTION_FAULT_DEFAULT_ADDR_LO32_BASE_IDX                                          0
 #define mmGCVM_L2_PROTECTION_FAULT_DEFAULT_ADDR_HI32                                                   0x15cc
 #define mmGCVM_L2_PROTECTION_FAULT_DEFAULT_ADDR_HI32_BASE_IDX                                          0
+#define mmGCVM_DEBUG                                                                                   0x15cd
+#define mmGCVM_DEBUG_BASE_IDX                                                                          0
 #define mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_LO32                                             0x15ce
 #define mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_LO32_BASE_IDX                                    0
 #define mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_HI32                                             0x15cf
@@ -3151,6 +3153,8 @@
 #define mmGCVM_L2_BANK_SELECT_RESERVED_CID2_BASE_IDX                                                   0
 #define mmGCVM_L2_CACHE_PARITY_CNTL                                                                    0x15d8
 #define mmGCVM_L2_CACHE_PARITY_CNTL_BASE_IDX                                                           0
+#define mmGCVM_L2_IH_LOG_CNTL                                                                          0x15d9
+#define mmGCVM_L2_IH_LOG_CNTL_BASE_IDX                                                                 0
 #define mmGCVM_L2_CNTL5                                                                                0x15dc
 #define mmGCVM_L2_CNTL5_BASE_IDX                                                                       0
 #define mmGCVM_L2_GCR_CNTL                                                                             0x15dd