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| author |   Gwan-gyeong Mun <gwan-gyeong.mun@intel.com> | 2022-02-25 15:13:16 +0200 |
|---|---|---|
| committer |   Ramalingam C <ramalingam.c@intel.com> | 2022-03-07 00:09:13 +0530 |
| commit | d028a7690d872d4720628c7475dbd1a25cfa73df (patch) | |
| tree | 3793d67ea0316764b803086df19cf3ebbf649c21 | |
| parent | drm/i915/dmabuf: Update dma_buf_ops.unmap_dma_buf callback to use drm_gem_unmap_dma_buf() (diff) | |
| download | linux-dev-d028a7690d872d4720628c7475dbd1a25cfa73df.tar.xz linux-dev-d028a7690d872d4720628c7475dbd1a25cfa73df.zip | |
drm/i915/dmabuf: Fix prime_mmap to work when using LMEM
The current implementation of i915 prime mmap only works when initializing
drm_i915_gem_object with shmem_region.
When using LMEM, drm_i915_gem_object is initialized with ttm_system_region.
In order to make prime mmap work even this case, when using LMEM
(when using ttm in i915), dma_buf_ops.mmap callback function calls
drm_gem_prime_mmap(). drm_gem_prime_mmap() of drm core calls internally
i915_gem_mmap() so that prime mmap can perform normally.
The fake offset is processed inside drm_gem_prime_mmap().
Testcase: igt/prime_mmap
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220225131316.1433515-3-gwan-gyeong.mun@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c index af899ae1f3c7..f5062d0c6333 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c @@ -93,11 +93,15 @@ static void i915_gem_dmabuf_vunmap(struct dma_buf *dma_buf, static int i915_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma) { struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf); + struct drm_i915_private *i915 = to_i915(obj->base.dev); int ret; if (obj->base.size < vma->vm_end - vma->vm_start) return -EINVAL; + if (HAS_LMEM(i915)) + return drm_gem_prime_mmap(&obj->base, vma); + if (!obj->base.filp) return -ENODEV; |