Split the individual steps of GEM object allocation and initialization clearly. This improves readability and prepares for dma_buf import support.
Signed-off-by: Laurent Pinchart laurent.pinchart@ideasonboard.com --- drivers/gpu/drm/omapdrm/omap_gem.c | 75 ++++++++++++++++++++++---------------- 1 file changed, 43 insertions(+), 32 deletions(-)
diff --git a/drivers/gpu/drm/omapdrm/omap_gem.c b/drivers/gpu/drm/omapdrm/omap_gem.c index ba16d792a33e..51580eaa37af 100644 --- a/drivers/gpu/drm/omapdrm/omap_gem.c +++ b/drivers/gpu/drm/omapdrm/omap_gem.c @@ -1345,67 +1345,80 @@ struct drm_gem_object *omap_gem_new(struct drm_device *dev, size_t size; int ret;
+ /* Validate the flags and compute the memory and cache flags. */ if (flags & OMAP_BO_TILED) { if (!priv->usergart) { dev_err(dev->dev, "Tiled buffers require DMM\n"); return NULL; }
- /* tiled buffers are always shmem paged backed.. when they are - * scanned out, they are remapped into DMM/TILER + /* + * Tiled buffers are always shmem paged backed. When they are + * scanned out, they are remapped into DMM/TILER. */ flags &= ~OMAP_BO_SCANOUT; + flags |= OMAP_BO_MEM_SHMEM;
- /* currently don't allow cached buffers.. there is some caching - * stuff that needs to be handled better + /* + * Currently don't allow cached buffers. There is some caching + * stuff that needs to be handled better. */ flags &= ~(OMAP_BO_CACHED|OMAP_BO_WC|OMAP_BO_UNCACHED); flags |= tiler_get_cpu_cache_flags(); - - /* align dimensions to slot boundaries... */ - tiler_align(gem2fmt(flags), - &gsize.tiled.width, &gsize.tiled.height); - - /* ...and calculate size based on aligned dimensions */ - size = tiler_size(gem2fmt(flags), - gsize.tiled.width, gsize.tiled.height); - } else { - size = PAGE_ALIGN(gsize.bytes); + } else if ((flags & OMAP_BO_SCANOUT) && !priv->usergart) { + /* + * Use contiguous memory if we don't have DMM to remap + * discontiguous buffers. + */ + flags |= OMAP_BO_MEM_DMA_API; + } else if (!(flags & OMAP_BO_MEM_EXT)) { + /* + * All other buffers not backed with external memory are + * shmem-backed. + */ + flags |= OMAP_BO_MEM_SHMEM; }
+ /* Allocate the initialize the OMAP GEM object. */ omap_obj = kzalloc(sizeof(*omap_obj), GFP_KERNEL); if (!omap_obj) return NULL;
obj = &omap_obj->base; + omap_obj->flags = flags;
- if ((flags & OMAP_BO_SCANOUT) && !priv->usergart) { - /* attempt to allocate contiguous memory if we don't - * have DMM for remappign discontiguous buffers + if (flags & OMAP_BO_TILED) { + /* + * For tiled buffers align dimensions to slot boundaries and + * calculate size based on aligned dimensions. */ - omap_obj->vaddr = dma_alloc_writecombine(dev->dev, size, - &omap_obj->paddr, GFP_KERNEL); - if (!omap_obj->vaddr) { - kfree(omap_obj); + tiler_align(gem2fmt(flags), &gsize.tiled.width, + &gsize.tiled.height);
- return NULL; - } + size = tiler_size(gem2fmt(flags), gsize.tiled.width, + gsize.tiled.height);
- flags |= OMAP_BO_MEM_DMA_API; + omap_obj->width = gsize.tiled.width; + omap_obj->height = gsize.tiled.height; + } else { + size = PAGE_ALIGN(gsize.bytes); }
spin_lock(&priv->list_lock); list_add(&omap_obj->mm_list, &priv->obj_list); spin_unlock(&priv->list_lock);
- omap_obj->flags = flags; - - if (flags & OMAP_BO_TILED) { - omap_obj->width = gsize.tiled.width; - omap_obj->height = gsize.tiled.height; + /* Allocate memory if needed. */ + if (flags & OMAP_BO_MEM_DMA_API) { + omap_obj->vaddr = dma_alloc_writecombine(dev->dev, size, + &omap_obj->paddr, + GFP_KERNEL); + if (!omap_obj->vaddr) + goto fail; }
- if (flags & (OMAP_BO_MEM_DMA_API | OMAP_BO_MEM_EXT)) { + /* Initialize the GEM object. */ + if (!(flags & OMAP_BO_MEM_SHMEM)) { drm_gem_private_object_init(dev, obj, size); } else { ret = drm_gem_object_init(dev, obj, size); @@ -1414,8 +1427,6 @@ struct drm_gem_object *omap_gem_new(struct drm_device *dev,
mapping = file_inode(obj->filp)->i_mapping; mapping_set_gfp_mask(mapping, GFP_USER | __GFP_DMA32); - - omap_obj->flags |= OMAP_BO_MEM_SHMEM; }
return obj;