1 /* 2 * Copyright (c) 2020 The Linux Foundation. All rights reserved. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for 5 * any purpose with or without fee is hereby granted, provided that the 6 * above copyright notice and this permission notice appear in all 7 * copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL 10 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED 11 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE 12 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 13 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 14 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 15 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 16 * PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 /** 20 * DOC: qdf_nbuf_frag.c 21 * QCA driver framework(QDF) network nbuf frag management APIs 22 */ 23 24 #include <qdf_module.h> 25 #include <qdf_nbuf_frag.h> 26 27 #if defined(HIF_PCI) 28 QDF_STATUS __qdf_mem_map_page(qdf_device_t osdev, __qdf_frag_t buf, 29 qdf_dma_dir_t dir, size_t nbytes, 30 qdf_dma_addr_t *phy_addr) 31 { 32 struct page *page; 33 unsigned long offset; 34 35 page = virt_to_head_page(buf); 36 offset = buf - page_address(page); 37 *phy_addr = dma_map_page(osdev->dev, page, offset, nbytes, 38 __qdf_dma_dir_to_os(dir)); 39 40 return dma_mapping_error(osdev->dev, *phy_addr) ? 41 QDF_STATUS_E_FAILURE : QDF_STATUS_SUCCESS; 42 } 43 #else 44 QDF_STATUS __qdf_mem_map_page(qdf_device_t osdev, __qdf_frag_t buf, 45 qdf_dma_dir_t dir, size_t nbytes, 46 qdf_dma_addr_t *phy_addr) 47 { 48 return QDF_STATUS_SUCCESS; 49 } 50 #endif 51 52 qdf_export_symbol(__qdf_mem_map_page); 53 54 #if defined(HIF_PCI) 55 void __qdf_mem_unmap_page(qdf_device_t osdev, qdf_dma_addr_t paddr, 56 size_t nbytes, qdf_dma_dir_t dir) 57 { 58 dma_unmap_page(osdev->dev, paddr, nbytes, 59 __qdf_dma_dir_to_os(dir)); 60 } 61 #else 62 void __qdf_mem_unmap_page(qdf_device_t osdev, qdf_dma_addr_t paddr, 63 size_t nbytes, qdf_dma_dir_t dir) 64 { 65 } 66 #endif 67 68 qdf_export_symbol(__qdf_mem_unmap_page); 69