[PATCH] drm/amdgpu: resume kiq access debugfs

[Liu, Monk]

Reviewed-by: Monk Liu <Monk.liu at amd.com>

_____________________________________
Monk Liu|GPU Virtualization Team |AMD


-----Original Message-----
From: Yintian Tao <yttao at amd.com> 
Sent: Monday, April 13, 2020 2:58 PM
To: Liu, Monk <Monk.Liu at amd.com>
Cc: amd-gfx at lists.freedesktop.org; Tao, Yintian <Yintian.Tao at amd.com>
Subject: [PATCH] drm/amdgpu: resume kiq access debugfs

If there is no GPU hang, user still can access debugfs through kiq.

Signed-off-by: Yintian Tao <yttao at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 12 +++++++++---  drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h |  2 ++
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index 6a81c2ee7c7b..8c10084f44ef 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -335,17 +335,23 @@ void amdgpu_detect_virtualization(struct amdgpu_device *adev)
 	}
 }
 
-bool amdgpu_virt_can_access_debugfs(struct amdgpu_device *adev)
+bool amdgpu_virt_access_debugfs_is_mmio(struct amdgpu_device *adev)
 {
 	return amdgpu_sriov_is_debug(adev) ? true : false;  }
 
+bool amdgpu_virt_access_debugfs_is_kiq(struct amdgpu_device *adev) {
+	return amdgpu_sriov_is_normal(adev) ? true : false; }
+
 int amdgpu_virt_enable_access_debugfs(struct amdgpu_device *adev)  {
-	if (!amdgpu_sriov_vf(adev))
+	if (!amdgpu_sriov_vf(adev) ||
+	    amdgpu_virt_access_debugfs_is_kiq(adev))
 		return 0;
 
-	if (amdgpu_virt_can_access_debugfs(adev))
+	if (amdgpu_virt_access_debugfs_is_mmio(adev))
 		adev->virt.caps &= ~AMDGPU_SRIOV_CAPS_RUNTIME;
 	else
 		return -EPERM;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
index 8f20e6dbd7a9..de27308802c9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
@@ -299,6 +299,8 @@ static inline bool is_virtual_machine(void)
 	((adev)->virt.gim_feature & AMDGIM_FEATURE_PP_ONE_VF)  #define amdgpu_sriov_is_debug(adev) \
 	((!adev->in_gpu_reset) && adev->virt.tdr_debug)
+#define amdgpu_sriov_is_normal(adev) \
+	((!adev->in_gpu_reset) && (!adev->virt.tdr_debug))
 
 bool amdgpu_virt_mmio_blocked(struct amdgpu_device *adev);  void amdgpu_virt_init_setting(struct amdgpu_device *adev);
--
2.17.1