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drm/omap: gem: Merge __omap_gem_get_pages() and omap_gem_attach_pages()

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The __omap_gem_get_pages() function is a wrapper around
omap_gem_attach_pages() that returns the omap_obj->pages pointer through
a function argument. Some callers don't need the pages pointer, and all
of them can access omap_obj->pages directly. To simplify the code merge
the __omap_gem_get_pages() wrapper with omap_gem_attach_pages() and
update the callers accordingly.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Laurent Pinchart 2018-05-25 19:39:21 +03:00 committed by Tomi Valkeinen
parent 620063e10e
commit 2491244d77
1 changed files with 20 additions and 39 deletions
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59
drivers/gpu/drm/omapdrm/omap_gem.c
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@ -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;