[PATCH 2/4] drm/amdgpu: Add nbio v6_3_2 support

[Alex Deucher <alexander.deucher@amd.com>]

From: Hawking Zhang <Hawking.Zhang@amd.com>

v6_3_2 is a new nbio generation ip

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Le Ma <le.ma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/Makefile      |   2 +-
 drivers/gpu/drm/amd/amdgpu/nbio_v6_3_2.c | 168 +++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/nbio_v6_3_2.h |  31 +++++
 3 files changed, 200 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpu/drm/amd/amdgpu/nbio_v6_3_2.c
 create mode 100644 drivers/gpu/drm/amd/amdgpu/nbio_v6_3_2.h

diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
index db66c63721999..154a60e22c702 100644
--- a/drivers/gpu/drm/amd/amdgpu/Makefile
+++ b/drivers/gpu/drm/amd/amdgpu/Makefile
@@ -90,7 +90,7 @@ amdgpu-y += \
 	nbio_v7_2.o hdp_v4_0.o hdp_v5_0.o aldebaran_reg_init.o aldebaran.o soc21.o soc24.o \
 	sienna_cichlid.o smu_v13_0_10.o nbio_v4_3.o hdp_v6_0.o nbio_v7_7.o hdp_v5_2.o lsdma_v6_0.o \
 	nbio_v7_9.o aqua_vanjaram.o nbio_v7_11.o lsdma_v7_0.o hdp_v7_0.o nbif_v6_3_1.o \
-	cyan_skillfish_reg_init.o soc_v1_0.o lsdma_v7_1.o
+	cyan_skillfish_reg_init.o soc_v1_0.o lsdma_v7_1.o nbio_v6_3_2.o
 
 # add DF block
 amdgpu-y += \
diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v6_3_2.c b/drivers/gpu/drm/amd/amdgpu/nbio_v6_3_2.c
new file mode 100644
index 0000000000000..c21e5d2fe8397
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v6_3_2.c
@@ -0,0 +1,168 @@
+/*
+ * Copyright 2025 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 "nbio/nbio_6_3_2_offset.h"
+#include "nbio/nbio_6_3_2_sh_mask.h"
+
+#include "amdgpu.h"
+#include "nbio_v6_3_2.h"
+
+static u32 nbio_v6_3_2_get_pcie_index_offset(struct amdgpu_device *adev)
+{
+	return SOC15_REG_OFFSET(NBIO, 0, regBIF_BX0_PCIE_INDEX2);
+}
+
+static u32 nbio_v6_3_2_get_pcie_data_offset(struct amdgpu_device *adev)
+{
+	return SOC15_REG_OFFSET(NBIO, 0, regBIF_BX0_PCIE_DATA2);
+}
+
+static u32 nbio_v6_3_2_get_pcie_index_hi_offset(struct amdgpu_device *adev)
+{
+	return SOC15_REG_OFFSET(NBIO, 0, regBIF_BX0_PCIE_INDEX2_HI);
+}
+
+static u32 nbio_v6_3_2_get_rev_id(struct amdgpu_device *adev)
+{
+	u32 tmp;
+
+	/* TODO: RCC_STRAP0_RCC_DEV0_EPF0_STRAP0 is not accessible from
+	 * guest side. It requires bootloader to update specific fields
+	 * in ip discovery table to identify soc revision id.
+	 * Return 0 when the function is called from guest side until
+	 * bootloader change is available.
+	 */
+	if (amdgpu_sriov_vf(adev))
+		return 0;
+
+	tmp = RREG32_SOC15(NBIO, 0, regRCC_STRAP0_RCC_DEV0_EPF0_STRAP0);
+	tmp = REG_GET_FIELD(tmp, RCC_STRAP0_RCC_DEV0_EPF0_STRAP0,
+			    STRAP_ATI_REV_ID_DEV0_F0);
+
+	return tmp;
+}
+
+static void nbio_v6_3_2_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_v6_3_2_get_memsize(struct amdgpu_device *adev)
+{
+	return RREG32_SOC15(NBIO, 0, regRCC_DEV0_EPF0_RCC_CONFIG_MEMSIZE);
+}
+
+static void nbio_v6_3_2_enable_doorbell_aperture(struct amdgpu_device *adev,
+						 bool enable)
+{
+	/* Enable to allow doorbell pass thru on pre-silicon bare-metal */
+	WREG32_SOC15(NBIO, 0, regGDC0_DOORBELL_ACCESS_EN_PF, 0xfffff);
+	WREG32_FIELD15_PREREG(NBIO, 0, RCC_DEV0_EPF0_RCC_DOORBELL_APER_EN,
+			BIF_DOORBELL_APER_EN, enable ? 1 : 0);
+}
+
+static void nbio_v6_3_2_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_v6_3_2_enable_doorbell_interrupt(struct amdgpu_device *adev,
+						  bool enable)
+{
+	WREG32_FIELD15_PREREG(NBIO, 0, BIF_BX0_BIF_DOORBELL_INT_CNTL,
+			      DOORBELL_INTERRUPT_DISABLE, enable ? 0 : 1);
+}
+
+static int nbio_v6_3_2_get_compute_partition_mode(struct amdgpu_device *adev)
+{
+	u32 tmp, px;
+
+	tmp = RREG32_SOC15(NBIO, 0, regBIF_BX_PF0_PARTITION_COMPUTE_STATUS);
+	px = REG_GET_FIELD(tmp, BIF_BX_PF0_PARTITION_COMPUTE_STATUS,
+			   PARTITION_MODE);
+
+	return px;
+}
+
+static bool nbio_v6_3_2_is_nps_switch_requested(struct amdgpu_device *adev)
+{
+	u32 tmp;
+
+	tmp = RREG32_SOC15(NBIO, 0, regBIF_BX_PF0_PARTITION_MEM_STATUS);
+	tmp = REG_GET_FIELD(tmp, BIF_BX_PF0_PARTITION_MEM_STATUS,
+			    CHANGE_STATUS);
+
+	/* 0x8 - NPS switch requested */
+	return (tmp == 0x8);
+}
+static u32 nbio_v6_3_2_get_memory_partition_mode(struct amdgpu_device *adev,
+						 u32 *supp_modes)
+{
+	u32 tmp;
+
+	tmp = RREG32_SOC15(NBIO, 0, regBIF_BX_PF0_PARTITION_MEM_STATUS);
+	tmp = REG_GET_FIELD(tmp, BIF_BX_PF0_PARTITION_MEM_STATUS, NPS_MODE);
+
+	if (supp_modes) {
+		*supp_modes =
+			RREG32_SOC15(NBIO, 0, regBIF_BX_PF0_PARTITION_MEM_CAP);
+	}
+
+	return ffs(tmp);
+}
+
+const struct amdgpu_nbio_funcs nbio_v6_3_2_funcs = {
+	.get_pcie_index_offset = nbio_v6_3_2_get_pcie_index_offset,
+	.get_pcie_data_offset = nbio_v6_3_2_get_pcie_data_offset,
+	.get_pcie_index_hi_offset = nbio_v6_3_2_get_pcie_index_hi_offset,
+	.get_rev_id = nbio_v6_3_2_get_rev_id,
+	.mc_access_enable = nbio_v6_3_2_mc_access_enable,
+	.get_memsize = nbio_v6_3_2_get_memsize,
+	.enable_doorbell_aperture = nbio_v6_3_2_enable_doorbell_aperture,
+	.enable_doorbell_selfring_aperture = nbio_v6_3_2_enable_doorbell_selfring_aperture,
+	.enable_doorbell_interrupt = nbio_v6_3_2_enable_doorbell_interrupt,
+	.get_compute_partition_mode = nbio_v6_3_2_get_compute_partition_mode,
+	.get_memory_partition_mode = nbio_v6_3_2_get_memory_partition_mode,
+	.is_nps_switch_requested = nbio_v6_3_2_is_nps_switch_requested,
+};
diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v6_3_2.h b/drivers/gpu/drm/amd/amdgpu/nbio_v6_3_2.h
new file mode 100644
index 0000000000000..bc7f747c88f47
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v6_3_2.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2025 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_V6_3_2_H__
+#define __NBIO_V6_3_2_H__
+
+#include "soc15_common.h"
+
+extern const struct amdgpu_nbio_funcs nbio_v6_3_2_funcs;
+
+#endif
-- 
2.53.0