| * Copyright (C) 2001 David J. Mckay (david.mckay@st.com) |
| * Copyright (C) 2003 Paul Mundt (lethal@linux-sh.org) |
| * May be copied or modified under the terms of the GNU General Public |
| * License. See linux/COPYING for more information. |
| * Dynamic DMA mapping support. |
| #include <linux/string.h> |
| void *consistent_alloc(struct pci_dev *hwdev, size_t size, |
| if (hwdev == NULL || hwdev->dma_mask != 0xffffffff) |
| ret = (void *)__get_free_pages(gfp, get_order(size)); |
| /* now call our friend ioremap_nocache to give us an uncached area */ |
| vp = ioremap_nocache(virt_to_phys(ret), size); |
| *dma_handle = virt_to_bus(ret); |
| dma_cache_wback_inv((unsigned long)ret, size); |
| void consistent_free(struct pci_dev *hwdev, size_t size, |
| void *vaddr, dma_addr_t dma_handle) |
| alloc = bus_to_virt((unsigned long)dma_handle); |
| free_pages((unsigned long)alloc, get_order(size)); |