From: "Stanley.Yang" <Stanley.Yang@xxxxxxx>
This adds nbio v4_3_0 ip block support
Changed from v1:
use WREG32_SOC15/RREG32_SOC15 instead of
WREG32_PCIE/RREG32_PCIE
remove the programming of PCIE_CONFIG_CNTL
Signed-off-by: Stanley.Yang <Stanley.Yang@xxxxxxx>
Reviewed-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/Makefile | 3 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h | 1 +
drivers/gpu/drm/amd/amdgpu/nbio_v4_3.c | 368 +++++++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/nbio_v4_3.h | 32 ++
4 files changed, 403 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/amd/amdgpu/nbio_v4_3.c
create mode 100644 drivers/gpu/drm/amd/amdgpu/nbio_v4_3.h
diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
index 2b454e7d7a76..313af306687b 100644
--- a/drivers/gpu/drm/amd/amdgpu/Makefile
+++ b/drivers/gpu/drm/amd/amdgpu/Makefile
@@ -74,7 +74,8 @@ amdgpu-$(CONFIG_DRM_AMDGPU_SI)+= si.o gmc_v6_0.o gfx_v6_0.o si_ih.o si_dma.o dce
amdgpu-y += \
vi.o mxgpu_vi.o nbio_v6_1.o soc15.o emu_soc.o mxgpu_ai.o nbio_v7_0.o vega10_reg_init.o \
vega20_reg_init.o nbio_v7_4.o nbio_v2_3.o nv.o arct_reg_init.o mxgpu_nv.o \
- nbio_v7_2.o hdp_v4_0.o hdp_v5_0.o aldebaran_reg_init.o aldebaran.o soc21.o
+ nbio_v7_2.o hdp_v4_0.o hdp_v5_0.o aldebaran_reg_init.o aldebaran.o soc21.o \
+ nbio_v4_3.o
# add DF block
amdgpu-y += \
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h
index ccd9fe96fab7..a240336bbc6b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h
@@ -70,6 +70,7 @@ struct amdgpu_nbio_funcs {
bool use_doorbell, int doorbell_index, int doorbell_size);
void (*vcn_doorbell_range)(struct amdgpu_device *adev, bool use_doorbell,
int doorbell_index, int instance);
+ void (*gc_doorbell_init)(struct amdgpu_device *adev);
void (*enable_doorbell_aperture)(struct amdgpu_device *adev,
bool enable);
void (*enable_doorbell_selfring_aperture)(struct amdgpu_device *adev,
diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v4_3.c b/drivers/gpu/drm/amd/amdgpu/nbio_v4_3.c
new file mode 100644
index 000000000000..ed31d133f07a
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v4_3.c
@@ -0,0 +1,368 @@
+/*
+ * Copyright 2021 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+#include "amdgpu.h"
+#include "amdgpu_atombios.h"
+#include "nbio_v4_3.h"
+
+#include "nbio/nbio_4_3_0_offset.h"
+#include "nbio/nbio_4_3_0_sh_mask.h"
+#include <uapi/linux/kfd_ioctl.h>
+
+static void nbio_v4_3_remap_hdp_registers(struct amdgpu_device *adev)
+{
+ WREG32_SOC15(NBIO, 0, regBIF_BX0_REMAP_HDP_MEM_FLUSH_CNTL,
+ adev->rmmio_remap.reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL);
+ WREG32_SOC15(NBIO, 0, regBIF_BX0_REMAP_HDP_REG_FLUSH_CNTL,
+ adev->rmmio_remap.reg_offset + KFD_MMIO_REMAP_HDP_REG_FLUSH_CNTL);
+}
+
+static u32 nbio_v4_3_get_rev_id(struct amdgpu_device *adev)
+{
+ u32 tmp = RREG32_SOC15(NBIO, 0, regRCC_STRAP0_RCC_DEV0_EPF0_STRAP0);
+
+ tmp &= RCC_STRAP0_RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0_MASK;
+ tmp >>= RCC_STRAP0_RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0__SHIFT;
+
+ return tmp;
+}
+
+static void nbio_v4_3_mc_access_enable(struct amdgpu_device *adev, bool enable)
+{
+ if (enable)
+ WREG32_SOC15(NBIO, 0, regBIF_BX0_BIF_FB_EN,
+ BIF_BX0_BIF_FB_EN__FB_READ_EN_MASK |
+ BIF_BX0_BIF_FB_EN__FB_WRITE_EN_MASK);
+ else
+ WREG32_SOC15(NBIO, 0, regBIF_BX0_BIF_FB_EN, 0);
+}
+
+static u32 nbio_v4_3_get_memsize(struct amdgpu_device *adev)
+{
+ return RREG32_SOC15(NBIO, 0, regRCC_DEV0_EPF0_RCC_CONFIG_MEMSIZE);
+}
+
+static void nbio_v4_3_sdma_doorbell_range(struct amdgpu_device *adev, int instance,
+ bool use_doorbell, int doorbell_index,
+ int doorbell_size)
+{
+ if (instance == 0) {
+ u32 doorbell_range = RREG32_SOC15(NBIO, 0, regS2A_DOORBELL_ENTRY_2_CTRL);
+
+ if (use_doorbell) {
+ doorbell_range = REG_SET_FIELD(doorbell_range,
+ S2A_DOORBELL_ENTRY_2_CTRL,
+ S2A_DOORBELL_PORT2_ENABLE,
+ 0x1);
+ doorbell_range = REG_SET_FIELD(doorbell_range,
+ S2A_DOORBELL_ENTRY_2_CTRL,
+ S2A_DOORBELL_PORT2_AWID,
+ 0xe);
+ doorbell_range = REG_SET_FIELD(doorbell_range,
+ S2A_DOORBELL_ENTRY_2_CTRL,
+ S2A_DOORBELL_PORT2_RANGE_OFFSET,
+ doorbell_index);
+ doorbell_range = REG_SET_FIELD(doorbell_range,
+ S2A_DOORBELL_ENTRY_2_CTRL,
+ S2A_DOORBELL_PORT2_RANGE_SIZE,
+ doorbell_size);
+ doorbell_range = REG_SET_FIELD(doorbell_range,
+ S2A_DOORBELL_ENTRY_2_CTRL,
+ S2A_DOORBELL_PORT2_AWADDR_31_28_VALUE,
+ 0x3);
+ } else
+ doorbell_range = REG_SET_FIELD(doorbell_range,
+ S2A_DOORBELL_ENTRY_2_CTRL,
+ S2A_DOORBELL_PORT2_RANGE_SIZE,
+ 0);
+
+ WREG32_SOC15(NBIO, 0, regS2A_DOORBELL_ENTRY_2_CTRL, doorbell_range);
+ }
+}
+
+static void nbio_v4_3_vcn_doorbell_range(struct amdgpu_device *adev, bool use_doorbell,
+ int doorbell_index, int instance)
+{
+ u32 doorbell_range;
+
+ if (instance)
+ doorbell_range = RREG32_SOC15(NBIO, 0, regS2A_DOORBELL_ENTRY_5_CTRL);
+ else
+ doorbell_range = RREG32_SOC15(NBIO, 0, regS2A_DOORBELL_ENTRY_4_CTRL);
+
+ if (use_doorbell) {
+ doorbell_range = REG_SET_FIELD(doorbell_range,
+ S2A_DOORBELL_ENTRY_4_CTRL,
+ S2A_DOORBELL_PORT4_ENABLE,
+ 0x1);
+ doorbell_range = REG_SET_FIELD(doorbell_range,
+ S2A_DOORBELL_ENTRY_4_CTRL,
+ S2A_DOORBELL_PORT4_AWID,
+ instance ? 0x7 : 0x4);
+ doorbell_range = REG_SET_FIELD(doorbell_range,
+ S2A_DOORBELL_ENTRY_4_CTRL,
+ S2A_DOORBELL_PORT4_RANGE_OFFSET,
+ doorbell_index);
+ doorbell_range = REG_SET_FIELD(doorbell_range,
+ S2A_DOORBELL_ENTRY_4_CTRL,
+ S2A_DOORBELL_PORT4_RANGE_SIZE,
+ 8);
+ doorbell_range = REG_SET_FIELD(doorbell_range,
+ S2A_DOORBELL_ENTRY_4_CTRL,
+ S2A_DOORBELL_PORT4_AWADDR_31_28_VALUE,
+ instance ? 0x7 : 0x4);
+ } else
+ doorbell_range = REG_SET_FIELD(doorbell_range,
+ S2A_DOORBELL_ENTRY_4_CTRL,
+ S2A_DOORBELL_PORT4_RANGE_SIZE,
+ 0);
+
+ if (instance)
+ WREG32_SOC15(NBIO, 0, regS2A_DOORBELL_ENTRY_5_CTRL, doorbell_range);
+ else
+ WREG32_SOC15(NBIO, 0, regS2A_DOORBELL_ENTRY_4_CTRL, doorbell_range);
+}
+
+static void nbio_v4_3_gc_doorbell_init(struct amdgpu_device *adev)
+{
+ WREG32_SOC15(NBIO, 0, regS2A_DOORBELL_ENTRY_0_CTRL, 0x30000007);
+ WREG32_SOC15(NBIO, 0, regS2A_DOORBELL_ENTRY_3_CTRL, 0x3000000d);
+}
+
+static void nbio_v4_3_enable_doorbell_aperture(struct amdgpu_device *adev,
+ bool enable)
+{
+ WREG32_FIELD15_PREREG(NBIO, 0, RCC_DEV0_EPF0_RCC_DOORBELL_APER_EN,
+ BIF_DOORBELL_APER_EN, enable ? 1 : 0);
+}
+
+static void nbio_v4_3_enable_doorbell_selfring_aperture(struct amdgpu_device *adev,
+ bool enable)
+{
+ u32 tmp = 0;
+
+ if (enable) {
+ tmp = REG_SET_FIELD(tmp, BIF_BX_PF0_DOORBELL_SELFRING_GPA_APER_CNTL,
+ DOORBELL_SELFRING_GPA_APER_EN, 1) |
+ REG_SET_FIELD(tmp, BIF_BX_PF0_DOORBELL_SELFRING_GPA_APER_CNTL,
+ DOORBELL_SELFRING_GPA_APER_MODE, 1) |
+ REG_SET_FIELD(tmp, BIF_BX_PF0_DOORBELL_SELFRING_GPA_APER_CNTL,
+ DOORBELL_SELFRING_GPA_APER_SIZE, 0);
+
+ WREG32_SOC15(NBIO, 0, regBIF_BX_PF0_DOORBELL_SELFRING_GPA_APER_BASE_LOW,
+ lower_32_bits(adev->doorbell.base));
+ WREG32_SOC15(NBIO, 0, regBIF_BX_PF0_DOORBELL_SELFRING_GPA_APER_BASE_HIGH,
+ upper_32_bits(adev->doorbell.base));
+ }
+
+ WREG32_SOC15(NBIO, 0, regBIF_BX_PF0_DOORBELL_SELFRING_GPA_APER_CNTL,
+ tmp);
+}
+
+static void nbio_v4_3_ih_doorbell_range(struct amdgpu_device *adev,
+ bool use_doorbell, int doorbell_index)
+{
+ u32 ih_doorbell_range = RREG32_SOC15(NBIO, 0, regS2A_DOORBELL_ENTRY_1_CTRL);
+
+ if (use_doorbell) {
+ ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range,
+ S2A_DOORBELL_ENTRY_1_CTRL,
+ S2A_DOORBELL_PORT1_ENABLE,
+ 0x1);
+ ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range,
+ S2A_DOORBELL_ENTRY_1_CTRL,
+ S2A_DOORBELL_PORT1_AWID,
+ 0x0);
+ ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range,
+ S2A_DOORBELL_ENTRY_1_CTRL,
+ S2A_DOORBELL_PORT1_RANGE_OFFSET,
+ doorbell_index);
+ ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range,
+ S2A_DOORBELL_ENTRY_1_CTRL,
+ S2A_DOORBELL_PORT1_RANGE_SIZE,
+ 2);
+ ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range,
+ S2A_DOORBELL_ENTRY_1_CTRL,
+ S2A_DOORBELL_PORT1_AWADDR_31_28_VALUE,
+ 0x0);
+ } else
+ ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range,
+ S2A_DOORBELL_ENTRY_1_CTRL,
+ S2A_DOORBELL_PORT1_RANGE_SIZE,
+ 0);
+
+ WREG32_SOC15(NBIO, 0, regS2A_DOORBELL_ENTRY_1_CTRL, ih_doorbell_range);
+}
+
+static void nbio_v4_3_ih_control(struct amdgpu_device *adev)
+{
+ u32 interrupt_cntl;
+
+ /* setup interrupt control */
+ WREG32_SOC15(NBIO, 0, regBIF_BX0_INTERRUPT_CNTL2, adev->dummy_page_addr >> 8);
+
+ interrupt_cntl = RREG32_SOC15(NBIO, 0, regBIF_BX0_INTERRUPT_CNTL);
+ /*
+ * BIF_BX0_INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK=0 - dummy read disabled with msi, enabled without msi
+ * BIF_BX0_INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK=1 - dummy read controlled by IH_DUMMY_RD_EN
+ */
+ interrupt_cntl = REG_SET_FIELD(interrupt_cntl, BIF_BX0_INTERRUPT_CNTL,
+ IH_DUMMY_RD_OVERRIDE, 0);
+
+ /* BIF_BX0_INTERRUPT_CNTL__IH_REQ_NONSNOOP_EN_MASK=1 if ring is in non-cacheable memory, e.g., vram */
+ interrupt_cntl = REG_SET_FIELD(interrupt_cntl, BIF_BX0_INTERRUPT_CNTL,
+ IH_REQ_NONSNOOP_EN, 0);
+
+ WREG32_SOC15(NBIO, 0, regBIF_BX0_INTERRUPT_CNTL, interrupt_cntl);
+}
+
+static void nbio_v4_3_update_medium_grain_clock_gating(struct amdgpu_device *adev,
+ bool enable)
+{
+ uint32_t def, data;
+
+ def = data = RREG32_SOC15(NBIO, 0, regCPM_CONTROL);
+ if (enable && (adev->cg_flags & AMD_CG_SUPPORT_BIF_MGCG)) {
+ data |= (CPM_CONTROL__LCLK_DYN_GATE_ENABLE_MASK |
+ CPM_CONTROL__TXCLK_DYN_GATE_ENABLE_MASK |
+ CPM_CONTROL__TXCLK_LCNT_GATE_ENABLE_MASK |
+ CPM_CONTROL__TXCLK_REGS_GATE_ENABLE_MASK |
+ CPM_CONTROL__TXCLK_PRBS_GATE_ENABLE_MASK |
+ CPM_CONTROL__REFCLK_REGS_GATE_ENABLE_MASK);
+ } else {
+ data &= ~(CPM_CONTROL__LCLK_DYN_GATE_ENABLE_MASK |
+ CPM_CONTROL__TXCLK_DYN_GATE_ENABLE_MASK |
+ CPM_CONTROL__TXCLK_LCNT_GATE_ENABLE_MASK |
+ CPM_CONTROL__TXCLK_REGS_GATE_ENABLE_MASK |
+ CPM_CONTROL__TXCLK_PRBS_GATE_ENABLE_MASK |
+ CPM_CONTROL__REFCLK_REGS_GATE_ENABLE_MASK);
+ }
+
+ if (def != data)
+ WREG32_SOC15(NBIO, 0, regCPM_CONTROL, data);
+}
+
+static void nbio_v4_3_update_medium_grain_light_sleep(struct amdgpu_device *adev,
+ bool enable)
+{
+ uint32_t def, data;
+
+ /* TODO: need update in future */
+ def = data = RREG32_SOC15(NBIO, 0, regPCIE_CNTL2);
+ if (enable && (adev->cg_flags & AMD_CG_SUPPORT_BIF_LS)) {
+ data |= PCIE_CNTL2__SLV_MEM_LS_EN_MASK;
+ } else {
+ data &= ~PCIE_CNTL2__SLV_MEM_LS_EN_MASK;
+ }
+
+ if (def != data)
+ WREG32_SOC15(NBIO, 0, regPCIE_CNTL2, data);
+}
+
+static void nbio_v4_3_get_clockgating_state(struct amdgpu_device *adev,
+ u64 *flags)
+{
+ int data;
+
+ /* AMD_CG_SUPPORT_BIF_MGCG */
+ data = RREG32_SOC15(NBIO, 0, regCPM_CONTROL);
+ if (data & CPM_CONTROL__LCLK_DYN_GATE_ENABLE_MASK)
+ *flags |= AMD_CG_SUPPORT_BIF_MGCG;
+
+ /* AMD_CG_SUPPORT_BIF_LS */
+ data = RREG32_SOC15(NBIO, 0, regPCIE_CNTL2);
+ if (data & PCIE_CNTL2__SLV_MEM_LS_EN_MASK)
+ *flags |= AMD_CG_SUPPORT_BIF_LS;
+}
+
+static u32 nbio_v4_3_get_hdp_flush_req_offset(struct amdgpu_device *adev)
+{
+ return SOC15_REG_OFFSET(NBIO, 0, regBIF_BX_PF0_GPU_HDP_FLUSH_REQ);
+}
+
+static u32 nbio_v4_3_get_hdp_flush_done_offset(struct amdgpu_device *adev)
+{
+ return SOC15_REG_OFFSET(NBIO, 0, regBIF_BX_PF0_GPU_HDP_FLUSH_DONE);
+}
+
+static u32 nbio_v4_3_get_pcie_index_offset(struct amdgpu_device *adev)
+{
+ return SOC15_REG_OFFSET(NBIO, 0, regBIF_BX_PF0_RSMU_INDEX);
+}
+
+static u32 nbio_v4_3_get_pcie_data_offset(struct amdgpu_device *adev)
+{
+ return SOC15_REG_OFFSET(NBIO, 0, regBIF_BX_PF0_RSMU_DATA);
+}
+
+const struct nbio_hdp_flush_reg nbio_v4_3_hdp_flush_reg = {
+ .ref_and_mask_cp0 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP0_MASK,
+ .ref_and_mask_cp1 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP1_MASK,
+ .ref_and_mask_cp2 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP2_MASK,
+ .ref_and_mask_cp3 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP3_MASK,
+ .ref_and_mask_cp4 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP4_MASK,
+ .ref_and_mask_cp5 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP5_MASK,
+ .ref_and_mask_cp6 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP6_MASK,
+ .ref_and_mask_cp7 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP7_MASK,
+ .ref_and_mask_cp8 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP8_MASK,
+ .ref_and_mask_cp9 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP9_MASK,
+ .ref_and_mask_sdma0 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__SDMA0_MASK,
+ .ref_and_mask_sdma1 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__SDMA1_MASK,
+};
+
+static void nbio_v4_3_init_registers(struct amdgpu_device *adev)
+{
+ return;
+}
+
+static u32 nbio_v4_3_get_rom_offset(struct amdgpu_device *adev)
+{
+ u32 data, rom_offset;
+
+ data = RREG32_SOC15(NBIO, 0, regREGS_ROM_OFFSET_CTRL);
+ rom_offset = REG_GET_FIELD(data, REGS_ROM_OFFSET_CTRL, ROM_OFFSET);
+
+ return rom_offset;
+}
+
+const struct amdgpu_nbio_funcs nbio_v4_3_funcs = {
+ .get_hdp_flush_req_offset = nbio_v4_3_get_hdp_flush_req_offset,
+ .get_hdp_flush_done_offset = nbio_v4_3_get_hdp_flush_done_offset,
+ .get_pcie_index_offset = nbio_v4_3_get_pcie_index_offset,
+ .get_pcie_data_offset = nbio_v4_3_get_pcie_data_offset,
+ .get_rev_id = nbio_v4_3_get_rev_id,
+ .mc_access_enable = nbio_v4_3_mc_access_enable,
+ .get_memsize = nbio_v4_3_get_memsize,
+ .sdma_doorbell_range = nbio_v4_3_sdma_doorbell_range,
+ .vcn_doorbell_range = nbio_v4_3_vcn_doorbell_range,
+ .gc_doorbell_init = nbio_v4_3_gc_doorbell_init,
+ .enable_doorbell_aperture = nbio_v4_3_enable_doorbell_aperture,
+ .enable_doorbell_selfring_aperture = nbio_v4_3_enable_doorbell_selfring_aperture,
+ .ih_doorbell_range = nbio_v4_3_ih_doorbell_range,
+ .update_medium_grain_clock_gating = nbio_v4_3_update_medium_grain_clock_gating,
+ .update_medium_grain_light_sleep = nbio_v4_3_update_medium_grain_light_sleep,
+ .get_clockgating_state = nbio_v4_3_get_clockgating_state,
+ .ih_control = nbio_v4_3_ih_control,
+ .init_registers = nbio_v4_3_init_registers,
+ .remap_hdp_registers = nbio_v4_3_remap_hdp_registers,
+ .get_rom_offset = nbio_v4_3_get_rom_offset,
+};
diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v4_3.h b/drivers/gpu/drm/amd/amdgpu/nbio_v4_3.h
new file mode 100644
index 000000000000..ade43661d7a9
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v4_3.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2021 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#ifndef __NBIO_V4_3_H__
+#define __NBIO_V4_3_H__
+
+#include "soc15_common.h"
+
+extern const struct nbio_hdp_flush_reg nbio_v4_3_hdp_flush_reg;
+extern const struct amdgpu_nbio_funcs nbio_v4_3_funcs;
+
+#endif
--
2.35.1
