[PATCH 1/3] drm/amdgpu: add amdgpu_virt_get_vf_mode helper function

[Kevin Wang]

the swsmu or powerplay(hwmgr) need to handle task according to different VF mode,
this function to help query vf mode.

vf mode:
1. SRIOV_VF_MODE_BARE_METAL: the driver work on host  OS (PF)
2. SRIOV_VF_MODE_ONE_VF    : the driver work on guest OS with one VF
3. SRIOV_VF_MODE_MULTI_VF  : the driver work on guest OS with multi VF

Signed-off-by: Kevin Wang <kevin1.wang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 16 ++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h |  8 ++++++++
 2 files changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index cbbb8d02535a..f3b38c9e04ca 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -370,3 +370,19 @@ void amdgpu_virt_disable_access_debugfs(struct amdgpu_device *adev)
 	if (amdgpu_sriov_vf(adev))
 		adev->virt.caps |= AMDGPU_SRIOV_CAPS_RUNTIME;
 }
+
+enum amdgpu_sriov_vf_mode amdgpu_virt_get_sriov_vf_mode(struct amdgpu_device *adev)
+{
+	enum amdgpu_sriov_vf_mode mode;
+
+	if (amdgpu_sriov_vf(adev)) {
+		if (amdgpu_sriov_is_pp_one_vf(adev))
+			mode = SRIOV_VF_MODE_ONE_VF;
+		else
+			mode = SRIOV_VF_MODE_MULTI_VF;
+	} else {
+		mode = SRIOV_VF_MODE_BARE_METAL;
+	}
+
+	return mode;
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
index de27308802c9..b90e822cebd7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
@@ -35,6 +35,12 @@
 /* tonga/fiji use this offset */
 #define mmBIF_IOV_FUNC_IDENTIFIER 0x1503
 
+enum amdgpu_sriov_vf_mode {
+	SRIOV_VF_MODE_BARE_METAL = 0,
+	SRIOV_VF_MODE_ONE_VF,
+	SRIOV_VF_MODE_MULTI_VF,
+};
+
 struct amdgpu_mm_table {
 	struct amdgpu_bo	*bo;
 	uint32_t		*cpu_addr;
@@ -323,4 +329,6 @@ void amdgpu_detect_virtualization(struct amdgpu_device *adev);
 bool amdgpu_virt_can_access_debugfs(struct amdgpu_device *adev);
 int amdgpu_virt_enable_access_debugfs(struct amdgpu_device *adev);
 void amdgpu_virt_disable_access_debugfs(struct amdgpu_device *adev);
+
+enum amdgpu_sriov_vf_mode amdgpu_virt_get_sriov_vf_mode(struct amdgpu_device *adev);
 #endif
-- 
2.17.1