1 /* 2 * Copyright (c) 2015 François Tigeot 3 * Copyright (c) 2015 Matthew Dillon <dillon@backplane.com> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice unmodified, this list of conditions, and the following 11 * disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef _ASM_PCI_DMA_COMPAT_H_ 29 #define _ASM_PCI_DMA_COMPAT_H_ 30 31 #include <vm/vm_page.h> 32 33 static inline dma_addr_t 34 pci_map_page(struct pci_dev *hwdev, struct page *page, 35 unsigned long offset, size_t size, int direction) 36 { 37 return VM_PAGE_TO_PHYS((struct vm_page *)page) + offset; 38 } 39 40 static inline void 41 pci_unmap_page(struct pci_dev *hwdev, dma_addr_t dma_address, 42 size_t size, int direction) 43 { 44 } 45 46 static inline int 47 pci_dma_mapping_error(struct pci_dev *hwdev, dma_addr_t dma_address) 48 { 49 return (dma_address == 0); 50 } 51 52 #endif /* _ASM_PCI_DMA_COMPAT_H_ */ 53