1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 #ifndef _LINUXKPI_LINUX_DMAPOOL_H_ 30 #define _LINUXKPI_LINUX_DMAPOOL_H_ 31 32 #include <linux/types.h> 33 #include <linux/io.h> 34 #include <linux/scatterlist.h> 35 #include <linux/device.h> 36 #include <linux/slab.h> 37 38 struct dma_pool; 39 struct dma_pool *linux_dma_pool_create(char *name, struct device *dev, 40 size_t size, size_t align, size_t boundary); 41 void linux_dma_pool_destroy(struct dma_pool *pool); 42 void lkpi_dmam_pool_destroy(struct device *, void *); 43 void *linux_dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, 44 dma_addr_t *handle); 45 void linux_dma_pool_free(struct dma_pool *pool, void *vaddr, 46 dma_addr_t dma_addr); 47 48 static inline struct dma_pool * 49 dma_pool_create(char *name, struct device *dev, size_t size, 50 size_t align, size_t boundary) 51 { 52 53 return (linux_dma_pool_create(name, dev, size, align, boundary)); 54 } 55 56 static inline struct dma_pool * 57 dmam_pool_create(/* const */ char *name, struct device *dev, size_t size, 58 size_t align, size_t boundary) 59 { 60 struct dma_pool **pp; 61 62 pp = devres_alloc(lkpi_dmam_pool_destroy, sizeof(*pp), GFP_KERNEL); 63 if (pp == NULL) 64 return (NULL); 65 *pp = linux_dma_pool_create(name, dev, size, align, boundary); 66 if (*pp == NULL) { 67 devres_free(pp); 68 return (NULL); 69 } 70 71 devres_add(dev, pp); 72 return (*pp); 73 } 74 75 static inline void 76 dma_pool_destroy(struct dma_pool *pool) 77 { 78 79 linux_dma_pool_destroy(pool); 80 } 81 82 static inline void * 83 dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, dma_addr_t *handle) 84 { 85 86 return (linux_dma_pool_alloc(pool, mem_flags, handle)); 87 } 88 89 static inline void * 90 dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags, dma_addr_t *handle) 91 { 92 93 return (dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle)); 94 } 95 96 static inline void 97 dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t dma_addr) 98 { 99 100 linux_dma_pool_free(pool, vaddr, dma_addr); 101 } 102 103 #endif /* _LINUXKPI_LINUX_DMAPOOL_H_ */ 104