/*
* ispmmu_vmap - Wrapper for Virtual memory mapping of a scatter gather list
* @dev: Device pointer specific to the OMAP3 ISP.
* @sglist: Pointer to source Scatter gather list to allocate.
* @sglen: Number of elements of the scatter-gatter list.
*
* Returns a resulting mapped device address by the ISP MMU, or -ENOMEM if
* we ran out of memory.
*/
static dma_addr_t
ispmmu_vmap(struct isp_device *isp, const struct scatterlist *sglist, int sglen)
{
struct sg_table *sgt;
u32 da;
sgt = kmalloc(sizeof(*sgt), GFP_KERNEL);
if (sgt == NULL)
return -ENOMEM;
sgt->sgl = (struct scatterlist *)sglist;
sgt->nents = sglen;
sgt->orig_nents = sglen;
da = iommu_vmap(isp->iommu, 0, sgt, IOMMU_FLAG);
if (IS_ERR_VALUE(da))
kfree(sgt);
return da;
}
dma_addr_t ispmmu_vmap(const struct scatterlist *sglist,
int sglen)
{
int err;
void *da;
struct sg_table *sgt;
unsigned int i;
struct scatterlist *sg, *src = (struct scatterlist *)sglist;
/*
* convert isp sglist to iommu sgt
* FIXME: should be fixed in the upper layer?
*/
sgt = kmalloc(sizeof(*sgt), GFP_KERNEL);
if (!sgt)
return -ENOMEM;
err = sg_alloc_table(sgt, sglen, GFP_KERNEL);
if (err)
goto err_sg_alloc;
for_each_sg(sgt->sgl, sg, sgt->nents, i)
sg_set_buf(sg, phys_to_virt(sg_dma_address(src + i)),
sg_dma_len(src + i));
da = (void *)iommu_vmap(isp_iommu, 0, sgt, IOMMU_FLAG);
if (IS_ERR(da))
goto err_vmap;
return (dma_addr_t)da;
err_vmap:
sg_free_table(sgt);
err_sg_alloc:
kfree(sgt);
return -ENOMEM;
}
