diff options
Diffstat (limited to 'drivers/gpu/drm/omapdrm/omap_gem.c')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_gem.c | 59 |
1 files changed, 20 insertions, 39 deletions
diff --git a/drivers/gpu/drm/omapdrm/omap_gem.c b/drivers/gpu/drm/omapdrm/omap_gem.c index 7a4ee4edab5b..a3efac4abd4b 100644 --- a/drivers/gpu/drm/omapdrm/omap_gem.c +++ b/drivers/gpu/drm/omapdrm/omap_gem.c @@ -222,7 +222,7 @@ static void omap_gem_evict(struct drm_gem_object *obj) * Page Management */ -/** ensure backing pages are allocated */ +/* Ensure backing pages are allocated. */ static int omap_gem_attach_pages(struct drm_gem_object *obj) { struct drm_device *dev = obj->dev; @@ -232,7 +232,12 @@ static int omap_gem_attach_pages(struct drm_gem_object *obj) int i, ret; dma_addr_t *addrs; - WARN_ON(omap_obj->pages); + /* + * If not using shmem (in which case backing pages don't need to be + * allocated) or if pages are already allocated we're done. + */ + if (!(omap_obj->flags & OMAP_BO_MEM_SHMEM) || omap_obj->pages) + return 0; pages = drm_gem_get_pages(obj); if (IS_ERR(pages)) { @@ -288,29 +293,6 @@ free_pages: return ret; } -/* acquire pages when needed (for example, for DMA where physically - * contiguous buffer is not required - */ -static int __omap_gem_get_pages(struct drm_gem_object *obj, - struct page ***pages) -{ - struct omap_gem_object *omap_obj = to_omap_bo(obj); - int ret = 0; - - if ((omap_obj->flags & OMAP_BO_MEM_SHMEM) && !omap_obj->pages) { - ret = omap_gem_attach_pages(obj); - if (ret) { - dev_err(obj->dev->dev, "could not attach pages\n"); - return ret; - } - } - - /* TODO: even phys-contig.. we should have a list of pages? */ - *pages = omap_obj->pages; - - return 0; -} - /** release backing pages */ static void omap_gem_detach_pages(struct drm_gem_object *obj) { @@ -522,7 +504,6 @@ vm_fault_t omap_gem_fault(struct vm_fault *vmf) struct drm_gem_object *obj = vma->vm_private_data; struct omap_gem_object *omap_obj = to_omap_bo(obj); struct drm_device *dev = obj->dev; - struct page **pages; int err; vm_fault_t ret; @@ -532,7 +513,7 @@ vm_fault_t omap_gem_fault(struct vm_fault *vmf) mutex_lock(&dev->struct_mutex); /* if a shmem backed object, make sure we have pages attached now */ - err = __omap_gem_get_pages(obj, &pages); + err = omap_gem_attach_pages(obj); if (err) { ret = vmf_error(err); goto fail; @@ -689,12 +670,12 @@ int omap_gem_roll(struct drm_gem_object *obj, u32 roll) /* if we aren't mapped yet, we don't need to do anything */ if (omap_obj->block) { - struct page **pages; - - ret = __omap_gem_get_pages(obj, &pages); + ret = omap_gem_attach_pages(obj); if (ret) goto fail; - ret = tiler_pin(omap_obj->block, pages, npages, roll, true); + + ret = tiler_pin(omap_obj->block, omap_obj->pages, npages, + roll, true); if (ret) dev_err(obj->dev->dev, "could not repin: %d\n", ret); } @@ -805,14 +786,13 @@ int omap_gem_pin(struct drm_gem_object *obj, dma_addr_t *dma_addr) if (!omap_gem_is_contiguous(omap_obj) && priv->has_dmm) { if (omap_obj->dma_addr_cnt == 0) { - struct page **pages; u32 npages = obj->size >> PAGE_SHIFT; enum tiler_fmt fmt = gem2fmt(omap_obj->flags); struct tiler_block *block; BUG_ON(omap_obj->block); - ret = __omap_gem_get_pages(obj, &pages); + ret = omap_gem_attach_pages(obj); if (ret) goto fail; @@ -832,7 +812,7 @@ int omap_gem_pin(struct drm_gem_object *obj, dma_addr_t *dma_addr) } /* TODO: enable async refill.. */ - ret = tiler_pin(block, pages, npages, + ret = tiler_pin(block, omap_obj->pages, npages, omap_obj->roll, true); if (ret) { tiler_release(block); @@ -941,16 +921,18 @@ int omap_gem_tiled_stride(struct drm_gem_object *obj, u32 orient) int omap_gem_get_pages(struct drm_gem_object *obj, struct page ***pages, bool remap) { + struct omap_gem_object *omap_obj = to_omap_bo(obj); int ret; + if (!remap) { - struct omap_gem_object *omap_obj = to_omap_bo(obj); if (!omap_obj->pages) return -ENOMEM; *pages = omap_obj->pages; return 0; } mutex_lock(&obj->dev->struct_mutex); - ret = __omap_gem_get_pages(obj, pages); + ret = omap_gem_attach_pages(obj); + *pages = omap_obj->pages; mutex_unlock(&obj->dev->struct_mutex); return ret; } @@ -975,13 +957,12 @@ void *omap_gem_vaddr(struct drm_gem_object *obj) struct omap_gem_object *omap_obj = to_omap_bo(obj); WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); if (!omap_obj->vaddr) { - struct page **pages; int ret; - ret = __omap_gem_get_pages(obj, &pages); + ret = omap_gem_attach_pages(obj); if (ret) return ERR_PTR(ret); - omap_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, + omap_obj->vaddr = vmap(omap_obj->pages, obj->size >> PAGE_SHIFT, VM_MAP, pgprot_writecombine(PAGE_KERNEL)); } return omap_obj->vaddr; |