[PATCH 075/100] drm/amdgpu: impl sriov detection for vega10

[Alex Deucher]

From: Xiangliang Yu <Xiangliang.Yu at amd.com>

Read vega10 hw register to detect if sriov is enabled, and call
it before IP blocks setting.

Signed-off-by: Xiangliang Yu <Xiangliang.Yu at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Acked-by: Christian König <christian.koenig at amd.com>
Reviewed-by: Monk Liu <Monk.Liu at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c | 18 ++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/nbio_v6_1.h |  1 +
 drivers/gpu/drm/amd/amdgpu/soc15.c     |  2 ++
 3 files changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c b/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c
index f517e9a..9021872 100644
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c
@@ -231,3 +231,21 @@ int nbio_v6_1_init(struct amdgpu_device *adev)
 
 	return 0;
 }
+
+void nbio_v6_1_detect_hw_virt(struct amdgpu_device *adev)
+{
+	uint32_t reg;
+
+	reg = RREG32(SOC15_REG_OFFSET(NBIO, 0,
+				      mmRCC_PF_0_0_RCC_IOV_FUNC_IDENTIFIER));
+	if (reg & 1)
+		adev->virt.caps |= AMDGPU_SRIOV_CAPS_IS_VF;
+
+	if (reg & 0x80000000)
+		adev->virt.caps |= AMDGPU_SRIOV_CAPS_ENABLE_IOV;
+
+	if (!reg) {
+		if (is_virtual_machine())	/* passthrough mode exclus sriov mod */
+			adev->virt.caps |= AMDGPU_PASSTHROUGH_MODE;
+	}
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.h b/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.h
index a778d1c..3e04093 100644
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.h
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.h
@@ -48,5 +48,6 @@ void nbio_v6_1_ih_control(struct amdgpu_device *adev);
 u32 nbio_v6_1_get_rev_id(struct amdgpu_device *adev);
 void nbio_v6_1_update_medium_grain_clock_gating(struct amdgpu_device *adev, bool enable);
 void nbio_v6_1_update_medium_grain_light_sleep(struct amdgpu_device *adev, bool enable);
+void nbio_v6_1_detect_hw_virt(struct amdgpu_device *adev);
 
 #endif
diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
index 07e10f3..263f602 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
@@ -469,6 +469,8 @@ static const struct amdgpu_ip_block_version vega10_common_ip_block =
 
 int soc15_set_ip_blocks(struct amdgpu_device *adev)
 {
+	nbio_v6_1_detect_hw_virt(adev);
+
 	switch (adev->asic_type) {
 	case CHIP_VEGA10:
 		amdgpu_ip_block_add(adev, &vega10_common_ip_block);
-- 
2.5.5