[PATCH] drm/amdgpu: normalize registers as local xcc to read/write under sriov

[Jane Jian <Jane.Jian@xxxxxxx>]

[WHY]
sriov has the higher bit violation when flushing tlb

[HOW]
normalize the registers to keep lower 16-bit(dword aligned) to aviod higher bit violation
RLCG will mask xcd out and always assume it's accessing its own xcd

also fix the typo in sriov_w/rreg:
for KIQ case, use xcc with xcc_id to read and write

v2
amend some typos

Signed-off-by: Jane Jian <Jane.Jian@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c  | 12 ++++++++++--
 drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c     |  8 ++++++--
 drivers/gpu/drm/amd/amdgpu/soc15_common.h |  2 ++
 3 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index 63f2286858c4..d43652a38484 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -1075,6 +1075,10 @@ void amdgpu_sriov_wreg(struct amdgpu_device *adev,
 	if (amdgpu_device_skip_hw_access(adev))
 		return;
 
+	/* Select lower 16 bits to write in local xcc */
+	if ((hwip == GC_HWIP) && !(acc_flags & AMDGPU_REGS_NO_KIQ))
+		offset = NORMALIZE_XCC_REG_OFFSET(offset);
+
 	if (!amdgpu_sriov_runtime(adev) &&
 		amdgpu_virt_get_rlcg_reg_access_flag(adev, acc_flags, hwip, true, &rlcg_flag)) {
 		amdgpu_virt_rlcg_reg_rw(adev, offset, value, rlcg_flag, xcc_id);
@@ -1084,7 +1088,7 @@ void amdgpu_sriov_wreg(struct amdgpu_device *adev,
 	if (acc_flags & AMDGPU_REGS_NO_KIQ)
 		WREG32_NO_KIQ(offset, value);
 	else
-		WREG32(offset, value);
+		WREG32_XCC(offset, value, xcc_id);
 }
 
 u32 amdgpu_sriov_rreg(struct amdgpu_device *adev,
@@ -1095,6 +1099,10 @@ u32 amdgpu_sriov_rreg(struct amdgpu_device *adev,
 	if (amdgpu_device_skip_hw_access(adev))
 		return 0;
 
+	/* Select lower 16 bits to read in local xcc */
+	if ((hwip == GC_HWIP) && !(acc_flags & AMDGPU_REGS_NO_KIQ))
+		offset = NORMALIZE_XCC_REG_OFFSET(offset);
+
 	if (!amdgpu_sriov_runtime(adev) &&
 		amdgpu_virt_get_rlcg_reg_access_flag(adev, acc_flags, hwip, false, &rlcg_flag))
 		return amdgpu_virt_rlcg_reg_rw(adev, offset, 0, rlcg_flag, xcc_id);
@@ -1102,7 +1110,7 @@ u32 amdgpu_sriov_rreg(struct amdgpu_device *adev,
 	if (acc_flags & AMDGPU_REGS_NO_KIQ)
 		return RREG32_NO_KIQ(offset);
 	else
-		return RREG32(offset);
+		return RREG32_XCC(offset, xcc_id);
 }
 
 bool amdgpu_sriov_xnack_support(struct amdgpu_device *adev)
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 88b4644f8e96..5bb275b96e6a 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -853,8 +853,12 @@ static void gmc_v9_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
 	 */
 	if (adev->gfx.kiq[inst].ring.sched.ready &&
 	    (amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev))) {
-		uint32_t req = hub->vm_inv_eng0_req + hub->eng_distance * eng;
-		uint32_t ack = hub->vm_inv_eng0_ack + hub->eng_distance * eng;
+
+		/* Select lower 16 bits to write in local xcc */
+		if (AMDGPU_IS_GFXHUB(vmhub)) {
+			req = NORMALIZE_XCC_REG_OFFSET(req);
+			ack = NORMALIZE_XCC_REG_OFFSET(ack);
+		}
 
 		amdgpu_gmc_fw_reg_write_reg_wait(adev, req, ack, inv_req,
 						 1 << vmid, inst);
diff --git a/drivers/gpu/drm/amd/amdgpu/soc15_common.h b/drivers/gpu/drm/amd/amdgpu/soc15_common.h
index 242b24f73c17..9ddf68e7d06e 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15_common.h
+++ b/drivers/gpu/drm/amd/amdgpu/soc15_common.h
@@ -210,4 +210,6 @@
 #define WREG64_MCA(ext, mca_base, idx, val) \
 	WREG64_PCIE_EXT(adev->asic_funcs->encode_ext_smn_addressing(ext) + mca_base + (idx * 8), val)
 
+#define NORMALIZE_XCC_REG_OFFSET(offset) (offset & 0xffff)
+
 #endif
-- 
2.34.1