drm_gem_object_put calls release_notify callback to free the mem
structure and unreserve_mem_limit, move it down after the last access
of mem and make it conditional call.
Signed-off-by: NPhilip Yang <Philip.Yang@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

amdgpu_amdkfd_gpuvm_free_memory_of_gpu drop dmabuf reference increased in
amdgpu_gem_prime_export.
amdgpu_bo_destroy drop dmabuf reference increased in
amdgpu_gem_prime_import.

So remove this extra dma_buf_put to avoid double free.
Signed-off-by: Nxinhui pan <xinhui.pan@amd.com>
Tested-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Acked-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

If a kfd_bo was shared (e.g. a dmabuf export), the original kfd_bo may be
freed when the amdgpu_bo still lives on. Free the kfd_bo struct in the
release_notify callback then the amdgpu_bo is freed.
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-By: NRamesh Errabolu <Ramesh.Errabolu@amd.com>
Reviewed-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

BOs need to be reserved before they are added or removed, so ensure that
they are reserved during kfd_mem_attach and kfd_mem_detach
Signed-off-by: NKent Russell <kent.russell@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Currently, all kfd BOs use same destruction routine. But pinned
BOs are not unpinned properly. Separate them from general routine.

v2 (Felix):
Add safeguard to prevent user space from freeing signal BO.
Kunmap signal BO in the event of setting event page error.
Just kunmap signal BO to avoid duplicating the code.
Signed-off-by: NLang Yu <lang.yu@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

The userptr can be unmapped by application and still registered to
driver, restore userptr work return user pages will get -EFAULT bad
address error. Pretend this error as succeed. GPU access this userptr
will have VM fault later, it is better than application soft hangs with
stalled user mode queues.

v2: squash in warning fix (Alex)
Signed-off-by: NPhilip Yang <Philip.Yang@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

We should unreference a gem object instead of an amdgpu bo here.

Fixes: fd9a9f88 ("drm/amdgpu: Use GEM obj reference for KFD BOs")
Signed-off-by: NLang Yu <lang.yu@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Memory is allocated for ttm->sg by kmalloc in kfd_mem_dmamap_userptr,
but isn't freed by kfree in kfd_mem_dmaunmap_userptr. Free it!

Fixes: 264fb4d3 ("drm/amdgpu: Add multi-GPU DMA mapping helpers")
Signed-off-by: NLang Yu <lang.yu@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Memory is allocated for ttm->sg by kmalloc in kfd_mem_dmamap_userptr,
but isn't freed by kfree in kfd_mem_dmaunmap_userptr. Free it!

Fixes: 264fb4d3 ("drm/amdgpu: Add multi-GPU DMA mapping helpers")
Signed-off-by: NLang Yu <lang.yu@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

This reverts commit 53d05330.

Revert reason: The issue has been resolved.
Signed-off-by: NEric Huang <jinhuieric.huang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

This reverts commit 7ed9876c.

Revert reason: The issue has been resolved.
Signed-off-by: NEric Huang <jinhuieric.huang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

This reverts commit 7ed9876c.

Revert reason: The issue has been resolved.
Signed-off-by: NEric Huang <jinhuieric.huang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

This reverts commit 31f33243.

Reason for revert: it causes regressions on several Asics.
Signed-off-by: NEric Huang <jinhuieric.huang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

The thunk needs to mmap all BOs for CPU access to allow the debugger to
access them. Invisible ones are mapped with PROT_NONE.

Fixes: 71df0368 ("drm/amdgpu: Implement mmap as GEM object function")
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

This reverts commit 31f33243.

Reason for revert: it causes regressions on several Asics.
Signed-off-by: NEric Huang <jinhuieric.huang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

This reverts commit 51627f03.

Reason for revert: it causes regression on Aldebaran.
Signed-off-by: NEric Huang <jinhuieric.huang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

The thunk needs to mmap all BOs for CPU access to allow the debugger to
access them. Invisible ones are mapped with PROT_NONE.

Fixes: 71df0368 ("drm/amdgpu: Implement mmap as GEM object function")
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

It is based on reverting two patches back.
  drm/amdkfd: Make TLB flush conditional on mapping
  drm/amdgpu: Add table_freed parameter to amdgpu_vm_bo_update
Signed-off-by: NEric Huang <jinhuieric.huang@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Use new helper function amdgpu_vm_set_pasid() to
assign vm pasid value. This also ensures that we don't free
a pasid from vm code as pasids are allocated somewhere else.
Signed-off-by: NNirmoy Das <nirmoy.das@amd.com>
Acked-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Page table entries are now in embedded in VM BO, so
we do not need struct amdgpu_vm_pt. This patch replaces
struct amdgpu_vm_pt with struct amdgpu_vm_bo_base.
Signed-off-by: NNirmoy Das <nirmoy.das@amd.com>
Reviewed-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Use adev_to_drm() to get to the drm_device pointer.
Signed-off-by: NGuchun Chen <guchun.chen@amd.com>
Reviewed-by: NLuben Tuikov <luben.tuikov@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Fixes handling when page tables are in system memory.

v3: remove struct amdgpu_vm_parser.
v2: remove unwanted variable.
    change amdgpu_amdkfd_validate instead of amdgpu_amdkfd_bo_validate.
Signed-off-by: NNirmoy Das <nirmoy.das@amd.com>
Reviewed-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

When the comment needs to state explicitly that this is doesn't get a reference
to the object then the function is named rather badly.

Rename the function and use it in even more places.

v2: use dma_resv_shared_list as new name
Signed-off-by: NChristian König <christian.koenig@amd.com>
Acked-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210602111714.212426-5-christian.koenig@amd.com

The variable k is being assigned a value that is never read, the
assignment is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

It is to optimize memory mapping latency, and also aviod
a page fault in a corner case of changing valid PDE into
PTE.
Signed-off-by: NEric Huang <jinhuieric.huang@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

When we want to decouble resource management from buffer management we need to
be able to handle resources separately.

Add a resource pointer and rename bo->mem so that all code needs to
change to access the pointer instead.

No functional change.
Signed-off-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NMatthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210430092508.60710-4-christian.koenig@amd.com

If amdgpu_gem_prime_export() fails, then this code accidentally
returns zero/success instead of a negative error code.

Fixes: 5ac3c3e4 ("drm/amdgpu: Add DMA mapping of GTT BOs")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

The amdgpu_bo_unreserve() has to be done on the error path as well.

Fixes: 9e5d2753 ("drm/amdgpu: Move kfd_mem_attach outside reservation")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

KFD userptr BOs and SG BOs used for DMA mappings can be preempted with
CWSR. Therefore we can use preemptible placement and avoid unwanted
evictions due to GTT accounting.
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Acked-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

The dmabuf attachment should be updated by moving the SG BO to DOMAIN_CPU
and back to DOMAIN_GTT. This does not necessarily invoke the
populate/unpopulate callbacks. Do this in backend_bind/unbind instead.
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: NChristian König <christian.koenig@amd.com>
Acked-by: NOak Zeng <Oak.Zeng@amd.com>
Acked-by: NRamesh Errabolu <Ramesh.Errabolu@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Use DMABufs with dynamic attachment to DMA-map GTT BOs on other GPUs.
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Acked-by: NOak Zeng <Oak.Zeng@amd.com>
Acked-by: NRamesh Errabolu <Ramesh.Errabolu@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

This is needed to avoid deadlocks with DMA buf import in the next patch.
Also move PT/PD validation out of kfd_mem_attach, that way the caller
can bo this unconditionally.
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Acked-by: NOak Zeng <Oak.Zeng@amd.com>
Acked-by: NRamesh Errabolu <Ramesh.Errabolu@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

DMA map kfd_mem_attachments in update_gpuvm_pte. This function is called
with the BO and page tables reserved, so we can safely update the DMA
mapping.

DMA unmap when a BO is unmapped from a GPU and before updating mappings
in restore workers.
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Acked-by: NOak Zeng <Oak.Zeng@amd.com>
Acked-by: NRamesh Errabolu <Ramesh.Errabolu@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Add BO-type specific helpers functions to DMA-map and unmap
kfd_mem_attachments. Implement this functionality for userptrs by creating
one SG BO per GPU and filling it with a DMA mapping of the pages from the
original mem->bo.
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Acked-by: NOak Zeng <Oak.Zeng@amd.com>
Acked-by: NRamesh Errabolu <Ramesh.Errabolu@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Do AQL queue double-mapping with a single attach call. That will make it
easier to create per-GPU BOs later, to be shared between the two BO VA
mappings on the same GPU.

Freeing the attachments is not necessary if map_to_gpu fails. These will be
cleaned up when the kdg_mem object is destroyed in
amdgpu_amdkfd_gpuvm_free_memory_of_gpu.
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Acked-by: NOak Zeng <Oak.Zeng@amd.com>
Acked-by: NRamesh Errabolu <Ramesh.Errabolu@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

For now they all reference the same BO. For correct DMA mappings they will
refer to different BOs per-GPU.
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Acked-by: NOak Zeng <Oak.Zeng@amd.com>
Acked-by: NRamesh Errabolu <Ramesh.Errabolu@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

This name is more fitting, especially for the changes coming next to
support multi-GPU systems with proper DMA mappings. Cleaned up the code
and renamed some related functions and variables to improve readability.
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Acked-by: NOak Zeng <Oak.Zeng@amd.com>
Acked-by: NRamesh Errabolu <Ramesh.Errabolu@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

MTYPE UC was used for a specific use case that ended up not being
implemented. Use NC for better performance for coarse-grained memory where
cache coherence during shader execution is not required.
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: NOak Zeng <Oak.Zeng@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

MTYPE UC was used for a specific use case that ended up not being
implemented. Use NC for better performance for coarse-grained memory where
cache coherence during shader execution is not required.
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: NOak Zeng <Oak.Zeng@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Add CREATE_SVM_BO define bit for SVM BOs.
Another define flag was moved to concentrate these
KFD type flags in one include file.
Signed-off-by: NAlex Sierra <alex.sierra@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>