drm/amdgpu: Enable doorbell selfring after resize FB BAR

[Why]
The selfring doorbell aperture will change when resize FB
BAR successfully during gmc sw init, we should reorder
the sequence of enabling doorbell selfring aperture.

[How]
Move enable_doorbell_selfring_aperture from *_common_hw_init
to *_common_late_init.

This fixes the potential issue that GPU ring its own
doorbell when this device is in translated mode when
iommu is on.

v2: Remove *_enable_doorbell_aperture functions (Christian)
v3: Add comments to note that why we need enable doorbell
    selfring late (Christian)

Signed-off-by: Shane Xiao <shane.xiao@amd.com>
Signed-off-by: Aaron Liu <aaron.liu@amd.com>
Tested-by: Xiaomeng Hou <Xiaomeng.Hou@amd.com>
Reviewed-by: Christian K�nig <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/nv.c b/drivers/gpu/drm/amd/amdgpu/nv.c
index 47420b4..98c826f 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/nv.c
+++ b/drivers/gpu/drm/amd/amdgpu/nv.c
@@ -531,13 +531,6 @@ static void nv_program_aspm(struct amdgpu_device *adev)
 
 }
 
-static void nv_enable_doorbell_aperture(struct amdgpu_device *adev,
-                                       bool enable)
-{
-       adev->nbio.funcs->enable_doorbell_aperture(adev, enable);
-       adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, enable);
-}
-
 const struct amdgpu_ip_block_version nv_common_ip_block =
 {
        .type = AMD_IP_BLOCK_TYPE_COMMON,
@@ -999,6 +992,11 @@ static int nv_common_late_init(void *handle)
                }
        }
 
+       /* Enable selfring doorbell aperture late because doorbell BAR
+        * aperture will change if resize BAR successfully in gmc sw_init.
+        */
+       adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, true);
+
        return 0;
 }
 
@@ -1038,7 +1036,7 @@ static int nv_common_hw_init(void *handle)
        if (adev->nbio.funcs->remap_hdp_registers && !amdgpu_sriov_vf(adev))
                adev->nbio.funcs->remap_hdp_registers(adev);
        /* enable the doorbell aperture */
-       nv_enable_doorbell_aperture(adev, true);
+       adev->nbio.funcs->enable_doorbell_aperture(adev, true);
 
        return 0;
 }
@@ -1047,8 +1045,13 @@ static int nv_common_hw_fini(void *handle)
 {
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-       /* disable the doorbell aperture */
-       nv_enable_doorbell_aperture(adev, false);
+       /* Disable the doorbell aperture and selfring doorbell aperture
+        * separately in hw_fini because nv_enable_doorbell_aperture
+        * has been removed and there is no need to delay disabling
+        * selfring doorbell.
+        */
+       adev->nbio.funcs->enable_doorbell_aperture(adev, false);
+       adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, false);
 
        return 0;
 }

diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
index bc5dd80..6d15d5c 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/soc15.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
@@ -619,13 +619,6 @@ static void soc15_program_aspm(struct amdgpu_device *adev)
                adev->nbio.funcs->program_aspm(adev);
 }
 
-static void soc15_enable_doorbell_aperture(struct amdgpu_device *adev,
-                                          bool enable)
-{
-       adev->nbio.funcs->enable_doorbell_aperture(adev, enable);
-       adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, enable);
-}
-
 const struct amdgpu_ip_block_version vega10_common_ip_block =
 {
        .type = AMD_IP_BLOCK_TYPE_COMMON,
@@ -1125,6 +1118,11 @@ static int soc15_common_late_init(void *handle)
        if (amdgpu_sriov_vf(adev))
                xgpu_ai_mailbox_get_irq(adev);
 
+       /* Enable selfring doorbell aperture late because doorbell BAR
+        * aperture will change if resize BAR successfully in gmc sw_init.
+        */
+       adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, true);
+
        return 0;
 }
 
@@ -1182,7 +1180,8 @@ static int soc15_common_hw_init(void *handle)
                adev->nbio.funcs->remap_hdp_registers(adev);
 
        /* enable the doorbell aperture */
-       soc15_enable_doorbell_aperture(adev, true);
+       adev->nbio.funcs->enable_doorbell_aperture(adev, true);
+
        /* HW doorbell routing policy: doorbell writing not
         * in SDMA/IH/MM/ACV range will be routed to CP. So
         * we need to init SDMA doorbell range prior
@@ -1198,8 +1197,14 @@ static int soc15_common_hw_fini(void *handle)
 {
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-       /* disable the doorbell aperture */
-       soc15_enable_doorbell_aperture(adev, false);
+       /* Disable the doorbell aperture and selfring doorbell aperture
+        * separately in hw_fini because soc15_enable_doorbell_aperture
+        * has been removed and there is no need to delay disabling
+        * selfring doorbell.
+        */
+       adev->nbio.funcs->enable_doorbell_aperture(adev, false);
+       adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, false);
+
        if (amdgpu_sriov_vf(adev))
                xgpu_ai_mailbox_put_irq(adev);
 

diff --git a/drivers/gpu/drm/amd/amdgpu/soc21.c b/drivers/gpu/drm/amd/amdgpu/soc21.c
index 514bfc7..744be2a 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/soc21.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc21.c
@@ -450,13 +450,6 @@ static void soc21_program_aspm(struct amdgpu_device *adev)
                adev->nbio.funcs->program_aspm(adev);
 }
 
-static void soc21_enable_doorbell_aperture(struct amdgpu_device *adev,
-                                       bool enable)
-{
-       adev->nbio.funcs->enable_doorbell_aperture(adev, enable);
-       adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, enable);
-}
-
 const struct amdgpu_ip_block_version soc21_common_ip_block =
 {
        .type = AMD_IP_BLOCK_TYPE_COMMON,
@@ -764,6 +757,11 @@ static int soc21_common_late_init(void *handle)
                        amdgpu_irq_get(adev, &adev->nbio.ras_err_event_athub_irq, 0);
        }
 
+       /* Enable selfring doorbell aperture late because doorbell BAR
+        * aperture will change if resize BAR successfully in gmc sw_init.
+        */
+       adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, true);
+
        return 0;
 }
 
@@ -797,7 +795,7 @@ static int soc21_common_hw_init(void *handle)
        if (adev->nbio.funcs->remap_hdp_registers)
                adev->nbio.funcs->remap_hdp_registers(adev);
        /* enable the doorbell aperture */
-       soc21_enable_doorbell_aperture(adev, true);
+       adev->nbio.funcs->enable_doorbell_aperture(adev, true);
 
        return 0;
 }
@@ -806,8 +804,13 @@ static int soc21_common_hw_fini(void *handle)
 {
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-       /* disable the doorbell aperture */
-       soc21_enable_doorbell_aperture(adev, false);
+       /* Disable the doorbell aperture and selfring doorbell aperture
+        * separately in hw_fini because soc21_enable_doorbell_aperture
+        * has been removed and there is no need to delay disabling
+        * selfring doorbell.
+        */
+       adev->nbio.funcs->enable_doorbell_aperture(adev, false);
+       adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, false);
 
        if (amdgpu_sriov_vf(adev)) {
                xgpu_nv_mailbox_put_irq(adev);