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: i_qdf_nbuf_frag.h 21 * This file provides OS dependent nbuf frag API's. 22 */ 23 24 #ifndef _I_QDF_NBUF_FRAG_H 25 #define _I_QDF_NBUF_FRAG_H 26 27 #include <qdf_net_types.h> 28 #include <qdf_mem.h> 29 30 /** 31 * typedef __qdf_frag_t - Abstraction for void * for frag address 32 */ 33 typedef void *__qdf_frag_t; 34 35 /** 36 * Maximum number of frags an SKB can hold 37 */ 38 #define __QDF_NBUF_MAX_FRAGS MAX_SKB_FRAGS 39 40 /** 41 * __qdf_mem_unmap_page() - Unmap frag memory 42 * @osdev: qdf_device_t 43 * @paddr: Address to be unmapped 44 * @nbytes: Number of bytes to be unmapped 45 * @dir: qdf_dma_dir_t 46 */ 47 void __qdf_mem_unmap_page(qdf_device_t osdev, qdf_dma_addr_t paddr, 48 size_t nbytes, qdf_dma_dir_t dir); 49 50 /** 51 * __qdf_mem_map_page() - Map frag memory 52 * @osdev: qdf_device_t 53 * @buf: Vaddr to be mapped 54 * @dir: qdf_dma_dir_t 55 * @nbytes: Number of bytes to be mapped 56 * @paddr: Mapped physical address 57 * 58 * Return: QDF_STATUS 59 */ 60 QDF_STATUS __qdf_mem_map_page(qdf_device_t osdev, __qdf_frag_t buf, 61 qdf_dma_dir_t dir, size_t nbytes, 62 qdf_dma_addr_t *phy_addr); 63 64 /** 65 * __qdf_frag_free() - Free allocated frag memory 66 * @vaddr: Frag address to be freed 67 */ 68 static inline void __qdf_frag_free(__qdf_frag_t vaddr) 69 { 70 skb_free_frag(vaddr); 71 } 72 73 /** 74 * __qdf_frag_alloc() - Allocate frag Memory 75 * @fragsz: Size of frag memory to be allocated 76 * 77 * Return: Allocated frag addr. 78 */ 79 static inline __qdf_frag_t __qdf_frag_alloc(unsigned int fragsz) 80 { 81 return netdev_alloc_frag(fragsz); 82 } 83 #endif /* _I_QDF_NBUF_FRAG_H */ 84