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[Public]
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
From: Grodzovsky, Andrey <Andrey.Grodzovsky@xxxxxxx>
Sent: Tuesday, May 18, 2021 10:01 AM To: dri-devel@xxxxxxxxxxxxxxxxxxxxx <dri-devel@xxxxxxxxxxxxxxxxxxxxx>; amd-gfx@xxxxxxxxxxxxxxxxxxxxx <amd-gfx@xxxxxxxxxxxxxxxxxxxxx>; linux-pci@xxxxxxxxxxxxxxx <linux-pci@xxxxxxxxxxxxxxx>; ckoenig.leichtzumerken@xxxxxxxxx <ckoenig.leichtzumerken@xxxxxxxxx>; daniel.vetter@xxxxxxxx <daniel.vetter@xxxxxxxx>; Wentland, Harry <Harry.Wentland@xxxxxxx> Cc: ppaalanen@xxxxxxxxx <ppaalanen@xxxxxxxxx>; Deucher, Alexander <Alexander.Deucher@xxxxxxx>; gregkh@xxxxxxxxxxxxxxxxxxx <gregkh@xxxxxxxxxxxxxxxxxxx>; helgaas@xxxxxxxxxx <helgaas@xxxxxxxxxx>; Kuehling, Felix <Felix.Kuehling@xxxxxxx> Subject: Re: [PATCH] drm/amdgpu: Unmap all MMIO mappings Ping
Andrey On 2021-05-17 3:31 p.m., Andrey Grodzovsky wrote: > Access to those must be prevented post pci_remove > > v6: Drop BOs list, unampping VRAM BAR is enough. > v8: > Add condition of xgmi.connected_to_cpu to MTTR > handling and remove MTTR handling from the old place. > > Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx> > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 26 +++++++++++++++++++--- > drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 4 ---- > drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 ---- > 3 files changed, 23 insertions(+), 11 deletions(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c > index f7cca25c0fa0..8b50315d1fe1 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c > @@ -3666,6 +3666,27 @@ int amdgpu_device_init(struct amdgpu_device *adev, > return r; > } > > +static void amdgpu_device_unmap_mmio(struct amdgpu_device *adev) > +{ > + /* Clear all CPU mappings pointing to this device */ > + unmap_mapping_range(adev->ddev.anon_inode->i_mapping, 0, 0, 1); > + > + /* Unmap all mapped bars - Doorbell, registers and VRAM */ > + amdgpu_device_doorbell_fini(adev); > + > + iounmap(adev->rmmio); > + adev->rmmio = NULL; > + if (adev->mman.aper_base_kaddr) > + iounmap(adev->mman.aper_base_kaddr); > + adev->mman.aper_base_kaddr = NULL; > + > + /* Memory manager related */ > + if (!adev->gmc.xgmi.connected_to_cpu) { > + arch_phys_wc_del(adev->gmc.vram_mtrr); > + arch_io_free_memtype_wc(adev->gmc.aper_base, adev->gmc.aper_size); > + } > +} > + > /** > * amdgpu_device_fini - tear down the driver > * > @@ -3712,6 +3733,8 @@ void amdgpu_device_fini_hw(struct amdgpu_device *adev) > amdgpu_device_ip_fini_early(adev); > > amdgpu_gart_dummy_page_fini(adev); > + > + amdgpu_device_unmap_mmio(adev); > } > > void amdgpu_device_fini_sw(struct amdgpu_device *adev) > @@ -3739,9 +3762,6 @@ void amdgpu_device_fini_sw(struct amdgpu_device *adev) > } > if ((adev->pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) > vga_client_register(adev->pdev, NULL, NULL, NULL); > - iounmap(adev->rmmio); > - adev->rmmio = NULL; > - amdgpu_device_doorbell_fini(adev); > > if (IS_ENABLED(CONFIG_PERF_EVENTS)) > amdgpu_pmu_fini(adev); > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c > index 0adffcace326..8eabe3c9ad17 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c > @@ -1107,10 +1107,6 @@ int amdgpu_bo_init(struct amdgpu_device *adev) > void amdgpu_bo_fini(struct amdgpu_device *adev) > { > amdgpu_ttm_fini(adev); > - if (!adev->gmc.xgmi.connected_to_cpu) { > - arch_phys_wc_del(adev->gmc.vram_mtrr); > - arch_io_free_memtype_wc(adev->gmc.aper_base, adev->gmc.aper_size); > - } > } > > /** > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c > index 0d54e70278ca..58ad2fecc9e3 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c > @@ -1841,10 +1841,6 @@ void amdgpu_ttm_fini(struct amdgpu_device *adev) > amdgpu_bo_free_kernel(&adev->mman.discovery_memory, NULL, NULL); > amdgpu_ttm_fw_reserve_vram_fini(adev); > > - if (adev->mman.aper_base_kaddr) > - iounmap(adev->mman.aper_base_kaddr); > - adev->mman.aper_base_kaddr = NULL; > - > amdgpu_vram_mgr_fini(adev); > amdgpu_gtt_mgr_fini(adev); > ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_GDS); > |
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