From: Russell King <rmk+ker...@arm.linux.org.uk>
Provide a get_pages() method for gem objects, which allows our objects
to provide their own method to obtain the struct page array and
scatterlist.
Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
---
drivers/staging/etnaviv/etnaviv_gem.c | 67 ++++++++++++++++-------------
drivers/staging/etnaviv/etnaviv_gem.h | 1 +
drivers/staging/etnaviv/etnaviv_gem_prime.c | 1 +
3 files changed, 38 insertions(+), 31 deletions(-)
diff --git a/drivers/staging/etnaviv/etnaviv_gem.c
b/drivers/staging/etnaviv/etnaviv_gem.c
index 2120cd378d86..e508d64aa2d3 100644
--- a/drivers/staging/etnaviv/etnaviv_gem.c
+++ b/drivers/staging/etnaviv/etnaviv_gem.c
@@ -24,39 +24,35 @@
#include "etnaviv_mmu.h"
/* called with dev->struct_mutex held */
-static struct page **get_pages(struct etnaviv_gem_object *etnaviv_obj)
+static int etnaviv_gem_shmem_get_pages(struct etnaviv_gem_object *etnaviv_obj)
{
- if (!etnaviv_obj->pages) {
- struct drm_device *dev = etnaviv_obj->base.dev;
- struct page **p;
- int npages = etnaviv_obj->base.size >> PAGE_SHIFT;
-
- p = drm_gem_get_pages(&etnaviv_obj->base);
+ struct drm_device *dev = etnaviv_obj->base.dev;
+ struct page **p;
+ int npages = etnaviv_obj->base.size >> PAGE_SHIFT;
- if (IS_ERR(p)) {
- dev_err(dev->dev, "could not get pages: %ld\n",
- PTR_ERR(p));
- return p;
- }
+ p = drm_gem_get_pages(&etnaviv_obj->base);
+ if (IS_ERR(p)) {
+ dev_err(dev->dev, "could not get pages: %ld\n", PTR_ERR(p));
+ return PTR_ERR(p);
+ }
- etnaviv_obj->sgt = drm_prime_pages_to_sg(p, npages);
- if (IS_ERR(etnaviv_obj->sgt)) {
- dev_err(dev->dev, "failed to allocate sgt\n");
- drm_gem_put_pages(&etnaviv_obj->base, p, false, false);
- return ERR_CAST(etnaviv_obj->sgt);
- }
+ etnaviv_obj->sgt = drm_prime_pages_to_sg(p, npages);
+ if (IS_ERR(etnaviv_obj->sgt)) {
+ dev_err(dev->dev, "failed to allocate sgt\n");
+ drm_gem_put_pages(&etnaviv_obj->base, p, false, false);
+ return PTR_ERR(p);
+ }
- etnaviv_obj->pages = p;
+ etnaviv_obj->pages = p;
- /* For non-cached buffers, ensure the new pages are clean
- * because display controller, GPU, etc. are not coherent:
- */
- if (etnaviv_obj->flags & (ETNA_BO_WC|ETNA_BO_UNCACHED))
- dma_map_sg(dev->dev, etnaviv_obj->sgt->sgl,
- etnaviv_obj->sgt->nents, DMA_BIDIRECTIONAL);
- }
+ /* For non-cached buffers, ensure the new pages are clean
+ * because display controller, GPU, etc. are not coherent:
+ */
+ if (etnaviv_obj->flags & (ETNA_BO_WC|ETNA_BO_UNCACHED))
+ dma_map_sg(dev->dev, etnaviv_obj->sgt->sgl,
+ etnaviv_obj->sgt->nents, DMA_BIDIRECTIONAL);
- return etnaviv_obj->pages;
+ return 0;
}
static void put_pages(struct etnaviv_gem_object *etnaviv_obj)
@@ -83,7 +79,15 @@ static void put_pages(struct etnaviv_gem_object *etnaviv_obj)
struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *etnaviv_obj)
{
- return get_pages(etnaviv_obj);
+ int ret;
+
+ if (!etnaviv_obj->pages) {
+ ret = etnaviv_obj->ops->get_pages(etnaviv_obj);
+ if (ret < 0)
+ return ERR_PTR(ret);
+ }
+
+ return etnaviv_obj->pages;
}
void etnaviv_gem_put_pages(struct etnaviv_gem_object *etnaviv_obj)
@@ -181,7 +185,7 @@ int etnaviv_gem_fault(struct vm_area_struct *vma, struct
vm_fault *vmf)
goto out;
/* make sure we have pages attached now */
- pages = get_pages(to_etnaviv_bo(obj));
+ pages = etnaviv_gem_get_pages(to_etnaviv_bo(obj));
if (IS_ERR(pages)) {
ret = PTR_ERR(pages);
goto out_unlock;
@@ -265,7 +269,7 @@ int etnaviv_gem_get_iova_locked(struct etnaviv_gpu *gpu,
if (!etnaviv_obj->iova && !(etnaviv_obj->flags & ETNA_BO_CMDSTREAM)) {
struct etnaviv_drm_private *priv = obj->dev->dev_private;
struct etnaviv_iommu *mmu = priv->mmu;
- struct page **pages = get_pages(etnaviv_obj);
+ struct page **pages = etnaviv_gem_get_pages(etnaviv_obj);
uint32_t offset;
struct drm_mm_node *node = NULL;
@@ -367,7 +371,7 @@ void *etnaviv_gem_vaddr_locked(struct drm_gem_object *obj)
WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex));
if (!etnaviv_obj->vaddr) {
- struct page **pages = get_pages(etnaviv_obj);
+ struct page **pages = etnaviv_gem_get_pages(etnaviv_obj);
if (IS_ERR(pages))
return ERR_CAST(pages);
@@ -532,6 +536,7 @@ static void etnaviv_gem_shmem_release(struct
etnaviv_gem_object *etnaviv_obj)
}
static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops = {
+ .get_pages = etnaviv_gem_shmem_get_pages,
.release = etnaviv_gem_shmem_release,
};
diff --git a/drivers/staging/etnaviv/etnaviv_gem.h
b/drivers/staging/etnaviv/etnaviv_gem.h
index 569a407cbd35..bbfcbd7557fe 100644
--- a/drivers/staging/etnaviv/etnaviv_gem.h
+++ b/drivers/staging/etnaviv/etnaviv_gem.h
@@ -68,6 +68,7 @@ struct etnaviv_gem_object {
#define to_etnaviv_bo(x) container_of(x, struct etnaviv_gem_object, base)
struct etnaviv_gem_ops {
+ int (*get_pages)(struct etnaviv_gem_object *);
void (*release)(struct etnaviv_gem_object *);
};
diff --git a/drivers/staging/etnaviv/etnaviv_gem_prime.c
b/drivers/staging/etnaviv/etnaviv_gem_prime.c
index 3a986ae9b00b..d15f4b60fa47 100644
--- a/drivers/staging/etnaviv/etnaviv_gem_prime.c
+++ b/drivers/staging/etnaviv/etnaviv_gem_prime.c
@@ -78,6 +78,7 @@ static void etnaviv_gem_prime_release(struct
etnaviv_gem_object *etnaviv_obj)
}
static const struct etnaviv_gem_ops etnaviv_gem_prime_ops = {
+ /* .get_pages should never be called */
.release = etnaviv_gem_prime_release,
};
--
2.1.4
