f211d536b6
Reviewed by: hselasky, kib Tested by: greg@unrelenting.technology Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D19845
295 lines
8.9 KiB
C
295 lines
8.9 KiB
C
/*-
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* Copyright (c) 2010 Isilon Systems, Inc.
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* Copyright (c) 2010 iX Systems, Inc.
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* Copyright (c) 2010 Panasas, Inc.
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* Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LINUX_DMA_MAPPING_H_
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#define _LINUX_DMA_MAPPING_H_
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#include <linux/types.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/dma-attrs.h>
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#include <linux/scatterlist.h>
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#include <linux/mm.h>
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#include <linux/page.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <vm/vm.h>
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#include <vm/vm_page.h>
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#include <vm/pmap.h>
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#include <machine/bus.h>
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enum dma_data_direction {
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DMA_BIDIRECTIONAL = 0,
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DMA_TO_DEVICE = 1,
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DMA_FROM_DEVICE = 2,
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DMA_NONE = 3,
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};
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struct dma_map_ops {
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void* (*alloc_coherent)(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t gfp);
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void (*free_coherent)(struct device *dev, size_t size,
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void *vaddr, dma_addr_t dma_handle);
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dma_addr_t (*map_page)(struct device *dev, struct page *page,
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unsigned long offset, size_t size, enum dma_data_direction dir,
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struct dma_attrs *attrs);
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void (*unmap_page)(struct device *dev, dma_addr_t dma_handle,
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size_t size, enum dma_data_direction dir, struct dma_attrs *attrs);
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int (*map_sg)(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir, struct dma_attrs *attrs);
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void (*unmap_sg)(struct device *dev, struct scatterlist *sg, int nents,
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enum dma_data_direction dir, struct dma_attrs *attrs);
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void (*sync_single_for_cpu)(struct device *dev, dma_addr_t dma_handle,
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size_t size, enum dma_data_direction dir);
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void (*sync_single_for_device)(struct device *dev,
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dma_addr_t dma_handle, size_t size, enum dma_data_direction dir);
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void (*sync_single_range_for_cpu)(struct device *dev,
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dma_addr_t dma_handle, unsigned long offset, size_t size,
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enum dma_data_direction dir);
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void (*sync_single_range_for_device)(struct device *dev,
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dma_addr_t dma_handle, unsigned long offset, size_t size,
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enum dma_data_direction dir);
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void (*sync_sg_for_cpu)(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir);
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void (*sync_sg_for_device)(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir);
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int (*mapping_error)(struct device *dev, dma_addr_t dma_addr);
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int (*dma_supported)(struct device *dev, u64 mask);
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int is_phys;
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};
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#define DMA_BIT_MASK(n) ((2ULL << ((n) - 1)) - 1ULL)
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int linux_dma_tag_init(struct device *dev, u64 mask);
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void *linux_dma_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flag);
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dma_addr_t linux_dma_map_phys(struct device *dev, vm_paddr_t phys, size_t len);
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void linux_dma_unmap(struct device *dev, dma_addr_t dma_addr, size_t size);
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int linux_dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
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int nents, enum dma_data_direction dir, struct dma_attrs *attrs);
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void linux_dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir, struct dma_attrs *attrs);
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static inline int
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dma_supported(struct device *dev, u64 mask)
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{
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/* XXX busdma takes care of this elsewhere. */
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return (1);
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}
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static inline int
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dma_set_mask(struct device *dev, u64 dma_mask)
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{
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if (!dev->dma_priv || !dma_supported(dev, dma_mask))
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return -EIO;
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return (linux_dma_tag_init(dev, dma_mask));
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}
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static inline int
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dma_set_coherent_mask(struct device *dev, u64 mask)
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{
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if (!dma_supported(dev, mask))
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return -EIO;
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/* XXX Currently we don't support a separate coherent mask. */
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return 0;
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}
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static inline int
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dma_set_mask_and_coherent(struct device *dev, u64 mask)
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{
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int r;
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r = dma_set_mask(dev, mask);
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if (r == 0)
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dma_set_coherent_mask(dev, mask);
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return (r);
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}
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static inline void *
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dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
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gfp_t flag)
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{
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return (linux_dma_alloc_coherent(dev, size, dma_handle, flag));
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}
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static inline void *
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dma_zalloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
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gfp_t flag)
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{
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return (dma_alloc_coherent(dev, size, dma_handle, flag | __GFP_ZERO));
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}
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static inline void
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dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
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dma_addr_t dma_addr)
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{
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linux_dma_unmap(dev, dma_addr, size);
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kmem_free((vm_offset_t)cpu_addr, size);
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}
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static inline dma_addr_t
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dma_map_single_attrs(struct device *dev, void *ptr, size_t size,
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enum dma_data_direction dir, struct dma_attrs *attrs)
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{
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return (linux_dma_map_phys(dev, vtophys(ptr), size));
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}
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static inline void
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dma_unmap_single_attrs(struct device *dev, dma_addr_t dma_addr, size_t size,
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enum dma_data_direction dir, struct dma_attrs *attrs)
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{
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linux_dma_unmap(dev, dma_addr, size);
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}
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static inline dma_addr_t
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dma_map_page_attrs(struct device *dev, struct page *page, size_t offset,
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size_t size, enum dma_data_direction dir, unsigned long attrs)
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{
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return (linux_dma_map_phys(dev, VM_PAGE_TO_PHYS(page) + offset, size));
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}
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static inline int
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dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl, int nents,
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enum dma_data_direction dir, struct dma_attrs *attrs)
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{
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return (linux_dma_map_sg_attrs(dev, sgl, nents, dir, attrs));
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}
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static inline void
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dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg, int nents,
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enum dma_data_direction dir, struct dma_attrs *attrs)
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{
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linux_dma_unmap_sg_attrs(dev, sg, nents, dir, attrs);
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}
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static inline dma_addr_t
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dma_map_page(struct device *dev, struct page *page,
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unsigned long offset, size_t size, enum dma_data_direction direction)
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{
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return (linux_dma_map_phys(dev, VM_PAGE_TO_PHYS(page) + offset, size));
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}
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static inline void
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dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
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enum dma_data_direction direction)
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{
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linux_dma_unmap(dev, dma_address, size);
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}
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static inline void
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dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
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enum dma_data_direction direction)
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{
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}
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static inline void
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dma_sync_single(struct device *dev, dma_addr_t addr, size_t size,
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enum dma_data_direction dir)
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{
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dma_sync_single_for_cpu(dev, addr, size, dir);
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}
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static inline void
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dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
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size_t size, enum dma_data_direction direction)
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{
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}
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static inline void
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dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
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enum dma_data_direction direction)
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{
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}
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static inline void
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dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
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enum dma_data_direction direction)
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{
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}
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static inline void
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dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
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unsigned long offset, size_t size, int direction)
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{
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}
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static inline void
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dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
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unsigned long offset, size_t size, int direction)
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{
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}
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static inline int
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dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
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{
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return (dma_addr == 0);
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}
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static inline unsigned int dma_set_max_seg_size(struct device *dev,
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unsigned int size)
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{
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return (0);
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}
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#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
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#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
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#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
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#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
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#define DEFINE_DMA_UNMAP_ADDR(name) dma_addr_t name
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#define DEFINE_DMA_UNMAP_LEN(name) __u32 name
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#define dma_unmap_addr(p, name) ((p)->name)
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#define dma_unmap_addr_set(p, name, v) (((p)->name) = (v))
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#define dma_unmap_len(p, name) ((p)->name)
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#define dma_unmap_len_set(p, name, v) (((p)->name) = (v))
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extern int uma_align_cache;
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#define dma_get_cache_alignment() uma_align_cache
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#endif /* _LINUX_DMA_MAPPING_H_ */
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