kernel/linux.git/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c, branch v5.16.1

drm/ttm: remove ttm_bo_vm_insert_huge()

2021-11-05T10:13:19+00:00

The huge page functionality in TTM does not work safely because PUD and PMD entries do not have a special bit. get_user_pages_fast() considers any page that passed pmd_huge() as usable: if (unlikely(pmd_trans_huge(pmd) || pmd_huge(pmd) || pmd_devmap(pmd))) { And vmf_insert_pfn_pmd_prot() unconditionally sets entry = pmd_mkhuge(pfn_t_pmd(pfn, prot)); eg on x86 the page will be _PAGE_PRESENT | PAGE_PSE. As such gup_huge_pmd() will try to deref a struct page: head = try_grab_compound_head(pmd_page(orig), refs, flags); and thus crash. Thomas further notices that the drivers are not expecting the struct page to be used by anything - in particular the refcount incr above will cause them to malfunction. Thus everything about this is not able to fully work correctly considering GUP_fast. Delete it entirely. It can return someday along with a proper PMD/PUD_SPECIAL bit in the page table itself to gate GUP_fast. Fixes: 314b6580adc5 ("drm/ttm, drm/vmwgfx: Support huge TTM pagefaults") Signed-off-by: Jason Gunthorpe Reviewed-by: Thomas Hellström Reviewed-by: Christian König [danvet: Update subject per Thomas' &Christian's review] Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/0-v2-a44694790652+4ac-ttm_pmd_jgg@nvidia.com

drm/amdgpu: Fix a deadlock if previous GEM object allocation fails

2021-08-31T18:20:08+00:00

Fall through to handle the error instead of return. Fixes: f8aab60422c37 ("drm/amdgpu: Initialise drm_gem_object_funcs for imported BOs") Cc: stable@vger.kernel.org Signed-off-by: xinhui pan Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/amdgpu: rename amdgpu_bo_get_preferred_pin_domain

2021-08-25T22:15:17+00:00

amdgpu_bo_get_preferred_pin_domain is used for page tables creation, which is not involved with page pinning. And it is used in more cases than display scanout, modify its documentation as well. Signed-off-by: Yifan Zhang Reviewed-by: Christian König Signed-off-by: Alex Deucher

Revert "Revert "drm/amdgpu: Add table_freed parameter to amdgpu_vm_bo_update""

2021-08-02T21:21:24+00:00

This reverts commit 024d8811c90ed56d8b90cdcf71e51c9fedeff460. Revert reason: The issue has been resolved. Signed-off-by: Eric Huang Signed-off-by: Alex Deucher

Backmerge tag 'v5.14-rc3' into drm-next

2021-07-25T23:27:59+00:00

Linux 5.14-rc3 Daniel said we should pull the nouveau fix from fixes in here, probably a good plan. Signed-off-by: Dave Airlie

Merge tag 'drm-misc-fixes-2021-07-22' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

2021-07-23T01:17:03+00:00

Short summary of fixes pull: * Return -ENOTTY for non-DRM ioctls * amdgpu: Fix COW checks * nouveau: init BO GME fields * panel: Avoid double free * ttm: Fix refcounting in ttm_global_init(); NULL checks * vc4: Fix interrupt handling Signed-off-by: Dave Airlie From: Thomas Zimmermann Link: https://patchwork.freedesktop.org/patch/msgid/YPlbkmH6S4VAHP9j@linux-uq9g.fritz.box

Merge tag 'drm-misc-next-2021-07-16' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

2021-07-21T01:58:28+00:00

drm-misc-next for v5.15: UAPI Changes: Cross-subsystem Changes: - udmabuf: Add support for mapping hugepages - Add dma-buf stats to sysfs. - Assorted fixes to fbdev/omap2. - dma-buf: Document DMA_BUF_IOCTL_SYNC - Improve dma-buf non-dynamic exporter expectations better. - Add module parameters for dma-buf size and list limit. - Add HDMI codec support to vc4, to replace vc4's own codec. - Document dma-buf implicit fencing rules. - dma_resv_test_signaled test_all handling. Core Changes: - Extract i915's eDP backlight code into DRM helpers. - Assorted docbook updates. - Rework drm_dp_aux documentation. - Add support for the DP aux bus. - Shrink dma-fence-chain slightly. - Add alloc/free helpers for dma-fence-chain. - Assorted fixes to TTM., drm/of, bridge - drm_gem_plane_helper_prepare/cleanup_fb is now the default for gem drivers. - Small fix for scheduler completion. - Remove use of drm_device.irq_enabled. - Print the driver name to dmesg when registering framebuffer. - Export drm/gem's shadow plane handling, and use it in vkms. - Assorted small fixes. Driver Changes: - Add eDP backlight to nouveau. - Assorted fixes and cleanups to nouveau, panfrost, vmwgfx, anx7625, amdgpu, gma500, radeon, mgag200, vgem, vc4, vkms, omapdrm. - Add support for Samsung DB7430, Samsung ATNA33XC20, EDT ETMV570G2DHU, EDT ETM0350G0DH6, Innolux EJ030NA panels. - Fix some simple pannels missing bus_format and connector types. - Add mks-guest-stats instrumentation support to vmwgfx. - Merge i915-ttm topic branch. - Make s6e63m0 panel use Mipi-DBI helpers. - Add detect() supoprt for AST. - Use interrupts for hotplug on vc4. - vmwgfx is now moved to drm-misc-next, as sroland is no longer a maintainer for now. - vmwgfx now uses copies of vmware's internal device headers. - Slowly convert ti-sn65dsi83 over to atomic. - Rework amdgpu dma-resv handling. - Fix virtio fencing for planes. - Ensure amdgpu can always evict to SYSTEM. - Many drivers fixed for implicit fencing rules. - Set default prepare/cleanup fb for tiny, vram and simple helpers too. - Rework panfrost gpu reset and related serialization. - Update VKMS todo list. - Make bochs a tiny gpu driver, and use vram helper. - Use linux irq interfaces instead of drm_irq in some drivers. - Add support for Raspberry Pi Pico to GUD. Signed-off-by: Dave Airlie # gpg: Signature made Fri 16 Jul 2021 21:06:04 AEST # gpg: using RSA key B97BD6A80CAC4981091AE547FE558C72A67013C3 # gpg: Good signature from "Maarten Lankhorst " [expired] # gpg: aka "Maarten Lankhorst " [expired] # gpg: aka "Maarten Lankhorst " [expired] # gpg: Note: This key has expired! # Primary key fingerprint: B97B D6A8 0CAC 4981 091A E547 FE55 8C72 A670 13C3 From: Maarten Lankhorst Link: https://patchwork.freedesktop.org/patch/msgid/444811c3-cbec-e9d5-9a6b-9632eda7962a@linux.intel.com

drm/amdgpu: workaround failed COW checks for Thunk VMAs

2021-07-16T07:22:57+00:00

KFD Thunk maps invisible VRAM BOs with PROT_NONE, MAP_PRIVATE. is_cow_mapping returns true for these mappings, which causes mmap to fail in ttm_bo_mmap_obj. As a workaround, clear VM_MAYWRITE for PROT_NONE-COW mappings. This should prevent the mapping from ever becoming writable and makes is_cow_mapping(vm_flags) false. Fixes: f91142c62161 ("drm/ttm: nuke VM_MIXEDMAP on BO mappings v3") Suggested-by: Daniel Vetter Tested-by: Felix Kuehling Signed-off-by: Felix Kuehling Reviewed-by: Christian König Link: https://patchwork.freedesktop.org/patch/msgid/20210715190537.585456-1-Felix.Kuehling@amd.com Signed-off-by: Christian König

Revert "drm/amdgpu: Add table_freed parameter to amdgpu_vm_bo_update"

2021-07-13T15:59:30+00:00

This reverts commit 075e8080c1a7571563171a07fa9ce47c4bc80044. Reason for revert: the related commit is reverted. Signed-off-by: Eric Huang Signed-off-by: Alex Deucher

drm/amdgpu: rework dma_resv handling v3

2021-06-22T09:05:05+00:00

Drop the workaround and instead implement a better solution. Basically we are now chaining all submissions using a dma_fence_chain container and adding them as exclusive fence to the dma_resv object. This way other drivers can still sync to the single exclusive fence while amdgpu only sync to fences from different processes. v3: add the shared fence first before the exclusive one Signed-off-by: Christian König Reviewed-by: Alex Deucher Acked-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210614174536.5188-2-christian.koenig@amd.com