/**
* sg_alloc_table - Allocate and initialize an sg table
* @table: The sg table header to use
* @nents: Number of entries in sg list
* @gfp_mask: GFP allocation mask
*
* Description:
* Allocate and initialize an sg table. If @nents@ is larger than
* SG_MAX_SINGLE_ALLOC a chained sg table will be setup.
*
**/
int sg_alloc_table(struct sg_table *table, unsigned int nents, gfp_t gfp_mask)
{
int ret;
ret = __sg_alloc_table(table, nents, SG_MAX_SINGLE_ALLOC,
gfp_mask, sg_kmalloc);
if (unlikely(ret))
__sg_free_table(table, SG_MAX_SINGLE_ALLOC, sg_kfree);
return ret;
}
struct sg_table *nvhost_nvmap_pin(struct mem_mgr *mgr,
struct mem_handle *handle)
{
int err = 0;
dma_addr_t ret = 0;
struct sg_table *sgt = kmalloc(sizeof(*sgt) + sizeof(*sgt->sgl),
GFP_KERNEL);
if (!sgt)
return ERR_PTR(-ENOMEM);
err = __sg_alloc_table(sgt, 1, 1, (gfp_t)(sgt+1), sg_kmalloc);
if (err)
return ERR_PTR(err);
ret = nvmap_pin((struct nvmap_client *)mgr,
(struct nvmap_handle_ref *)handle);
if (IS_ERR_VALUE(ret)) {
kfree(sgt);
return ERR_PTR(ret);
}
sg_dma_address(sgt->sgl) = ret;
return sgt;
}
