From: Gwan-gyeong Mun Date: Fri, 25 Feb 2022 13:13:16 +0000 (+0200) Subject: drm/i915/dmabuf: Fix prime_mmap to work when using LMEM X-Git-Tag: v6.1-rc5~176^2~23^2~312 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d028a7690d872d4720628c7475dbd1a25cfa73df;p=platform%2Fkernel%2Flinux-starfive.git 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 Cc: Matthew Auld Signed-off-by: Gwan-gyeong Mun Reviewed-by: Nirmoy Das Signed-off-by: Ramalingam C Link: https://patchwork.freedesktop.org/patch/msgid/20220225131316.1433515-3-gwan-gyeong.mun@intel.com --- diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c index af899ae..f5062d0 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;