diff options
Diffstat (limited to 'driver/kmem.c')
| -rw-r--r-- | driver/kmem.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/driver/kmem.c b/driver/kmem.c index ee64a78..f36ff8c 100644 --- a/driver/kmem.c +++ b/driver/kmem.c @@ -129,15 +129,23 @@ int pcidriver_kmem_alloc(pcidriver_privdata_t *privdata, kmem_handle_t *kmem_han case PCILIB_KMEM_TYPE_CONSISTENT: retptr = pci_alloc_consistent( privdata->pdev, kmem_handle->size, &(kmem_entry->dma_handle) ); break; + case PCILIB_KMEM_TYPE_REGION: + retptr = ioremap(kmem_handle->pa, kmem_handle->size); + kmem_entry->dma_handle = kmem_handle->pa; + if (kmem_entry->type == PCILIB_KMEM_TYPE_REGION_S2C) { + kmem_entry->direction = PCI_DMA_TODEVICE; + } else if (kmem_entry->type == PCILIB_KMEM_TYPE_REGION_C2S) { + kmem_entry->direction = PCI_DMA_FROMDEVICE; + } + break; case PCILIB_KMEM_TYPE_PAGE: if (kmem_handle->size == 0) kmem_handle->size = PAGE_SIZE; else if (kmem_handle->size%PAGE_SIZE) goto kmem_alloc_mem_fail; - + retptr = (void*)__get_free_pages(GFP_KERNEL|__GFP_DMA, get_order(kmem_handle->size)); kmem_entry->dma_handle = 0; - kmem_handle->size = kmem_handle->size; if (retptr) { if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_S2C_PAGE) { @@ -432,6 +440,9 @@ int pcidriver_kmem_free_entry(pcidriver_privdata_t *privdata, pcidriver_kmem_ent case PCILIB_KMEM_TYPE_CONSISTENT: pci_free_consistent( privdata->pdev, kmem_entry->size, (void *)(kmem_entry->cpua), kmem_entry->dma_handle ); break; + case PCILIB_KMEM_TYPE_REGION: + iounmap((void *)(kmem_entry->cpua)); + break; case PCILIB_KMEM_TYPE_PAGE: if (kmem_entry->dma_handle) { if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_S2C_PAGE) { @@ -609,12 +620,25 @@ int pcidriver_mmap_kmem(pcidriver_privdata_t *privdata, struct vm_area_struct *v virt_to_phys((void*)kmem_entry->cpua), page_to_pfn(virt_to_page((void*)kmem_entry->cpua))); - ret = remap_pfn_range_cpua_compat( + if ((kmem_entry->type&PCILIB_KMEM_TYPE_MASK) == PCILIB_KMEM_TYPE_REGION) { + mod_info("Mapping address %08lx / Size %08lx\n", + kmem_entry->dma_handle, + (vma_size < kmem_entry->size)?vma_size:kmem_entry->size) + + ret = remap_pfn_range_compat( + vma, + vma->vm_start, + kmem_entry->dma_handle, + (vma_size < kmem_entry->size)?vma_size:kmem_entry->size, + vma->vm_page_prot); + } else { + ret = remap_pfn_range_cpua_compat( vma, vma->vm_start, kmem_entry->cpua, (vma_size < kmem_entry->size)?vma_size:kmem_entry->size, vma->vm_page_prot ); + } if (ret) { mod_info("kmem remap failed: %d (%lx)\n", ret,kmem_entry->cpua); |