diff options
Diffstat (limited to 'driver/kmem.c')
| -rw-r--r-- | driver/kmem.c | 43 |
1 files changed, 34 insertions, 9 deletions
diff --git a/driver/kmem.c b/driver/kmem.c index f6e22a1..4f36e79 100644 --- a/driver/kmem.c +++ b/driver/kmem.c @@ -135,29 +135,42 @@ 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: flags = GFP_KERNEL; - + if ((kmem_entry->type == PCILIB_KMEM_TYPE_DMA_S2C_PAGE)||(kmem_entry->type == PCILIB_KMEM_TYPE_DMA_C2S_PAGE)) flags |= __GFP_DMA; - retptr = (void*)__get_free_pages(flags, get_order(PAGE_SIZE)); + 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(flags, get_order(kmem_handle->size)); kmem_entry->dma_handle = 0; - kmem_handle->size = PAGE_SIZE; if (retptr) { if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_S2C_PAGE) { kmem_entry->direction = PCI_DMA_TODEVICE; - kmem_entry->dma_handle = pci_map_single(privdata->pdev, retptr, PAGE_SIZE, PCI_DMA_TODEVICE); + kmem_entry->dma_handle = pci_map_single(privdata->pdev, retptr, kmem_handle->size, PCI_DMA_TODEVICE); if (pci_dma_mapping_error(privdata->pdev, kmem_entry->dma_handle)) { - free_page((unsigned long)retptr); + free_pages((unsigned long)retptr, get_order(kmem_handle->size)); goto kmem_alloc_mem_fail; } } else if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_C2S_PAGE) { kmem_entry->direction = PCI_DMA_FROMDEVICE; - kmem_entry->dma_handle = pci_map_single(privdata->pdev, retptr, PAGE_SIZE, PCI_DMA_FROMDEVICE); + kmem_entry->dma_handle = pci_map_single(privdata->pdev, retptr, kmem_handle->size, PCI_DMA_FROMDEVICE); if (pci_dma_mapping_error(privdata->pdev, kmem_entry->dma_handle)) { - free_page((unsigned long)retptr); + free_pages((unsigned long)retptr, get_order(kmem_handle->size)); goto kmem_alloc_mem_fail; } @@ -438,6 +451,9 @@ 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) { @@ -446,7 +462,7 @@ int pcidriver_kmem_free_entry(pcidriver_privdata_t *privdata, pcidriver_kmem_ent pci_unmap_single(privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, PCI_DMA_FROMDEVICE); } } - free_page((unsigned long)kmem_entry->cpua); + free_pages((unsigned long)kmem_entry->cpua, get_order(kmem_entry->size)); break; } @@ -615,12 +631,21 @@ 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) { + 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); |