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f946a5ec96
Substituting 'uma_align_cache' by the appropriately named accessor uma_get_cache_align_mask() made apparent that dma_get_cache_alignment() was off by one, since it was defined to be the mask derived from the alignment value. Reviewed by: markj, bz MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D42264 (cherry picked from commit 2c7dd66d09a1b92a4698232996cded6e5315b3bd)
381 lines
11 KiB
C
381 lines
11 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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#ifndef _LINUXKPI_LINUX_DMA_MAPPING_H_
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#define _LINUXKPI_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 <linux/sizes.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/uma_align_mask.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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unsigned long 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, unsigned long 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, unsigned long 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, unsigned long 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 *, u64);
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int linux_dma_tag_init_coherent(struct device *, u64);
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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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void *linuxkpi_dmam_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 __unused,
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unsigned long attrs __unused);
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void linux_dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg,
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int nents __unused, enum dma_data_direction dir __unused,
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unsigned long attrs __unused);
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void linuxkpi_dma_sync(struct device *, dma_addr_t, size_t, bus_dmasync_op_t);
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static inline int
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dma_supported(struct device *dev, u64 dma_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 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_coherent(dev, dma_mask));
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}
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static inline int
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dma_set_mask_and_coherent(struct device *dev, u64 dma_mask)
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{
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int r;
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r = dma_set_mask(dev, dma_mask);
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if (r == 0)
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dma_set_coherent_mask(dev, dma_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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dmam_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 (linuxkpi_dmam_alloc_coherent(dev, size, dma_handle, flag));
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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(cpu_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, page_to_phys(page) + offset, size));
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}
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/* linux_dma_(un)map_sg_attrs does not support attrs yet */
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#define dma_map_sg_attrs(dev, sgl, nents, dir, attrs) \
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linux_dma_map_sg_attrs(dev, sgl, nents, dir, 0)
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#define dma_unmap_sg_attrs(dev, sg, nents, dir, attrs) \
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linux_dma_unmap_sg_attrs(dev, sg, nents, dir, 0)
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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, 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, size_t size,
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enum dma_data_direction direction)
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{
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bus_dmasync_op_t op;
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switch (direction) {
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case DMA_BIDIRECTIONAL:
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op = BUS_DMASYNC_POSTREAD;
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linuxkpi_dma_sync(dev, dma, size, op);
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op = BUS_DMASYNC_PREREAD;
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break;
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case DMA_TO_DEVICE:
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op = BUS_DMASYNC_POSTWRITE;
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break;
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case DMA_FROM_DEVICE:
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op = BUS_DMASYNC_POSTREAD;
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break;
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default:
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return;
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}
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linuxkpi_dma_sync(dev, dma, size, op);
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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,
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size_t size, enum dma_data_direction direction)
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{
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bus_dmasync_op_t op;
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switch (direction) {
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case DMA_BIDIRECTIONAL:
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op = BUS_DMASYNC_PREWRITE;
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break;
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case DMA_TO_DEVICE:
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op = BUS_DMASYNC_PREREAD;
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break;
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case DMA_FROM_DEVICE:
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op = BUS_DMASYNC_PREWRITE;
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break;
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default:
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return;
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}
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linuxkpi_dma_sync(dev, dma, size, op);
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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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#define DMA_MAPPING_ERROR (~(dma_addr_t)0)
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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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if (dma_addr == 0 || dma_addr == DMA_MAPPING_ERROR)
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return (-ENOMEM);
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return (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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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 direction, unsigned long attrs __unused)
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{
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dma_addr_t dma;
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dma = linux_dma_map_phys(dev, vtophys(ptr), size);
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if (!dma_mapping_error(dev, dma))
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dma_sync_single_for_device(dev, dma, size, direction);
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return (dma);
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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, size_t size,
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enum dma_data_direction direction, unsigned long attrs __unused)
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{
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dma_sync_single_for_cpu(dev, dma, size, direction);
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linux_dma_unmap(dev, dma, size);
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}
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static inline size_t
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dma_max_mapping_size(struct device *dev)
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{
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return (SCATTERLIST_MAX_SEGMENT);
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}
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#define dma_map_single_attrs(dev, ptr, size, dir, attrs) \
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_dma_map_single_attrs(dev, ptr, size, dir, 0)
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#define dma_unmap_single_attrs(dev, dma_addr, size, dir, attrs) \
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_dma_unmap_single_attrs(dev, dma_addr, size, dir, 0)
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#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, 0)
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#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, 0)
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#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
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#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, 0)
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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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#define dma_get_cache_alignment() (uma_get_cache_align_mask() + 1)
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static inline int
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dma_map_sgtable(struct device *dev, struct sg_table *sgt,
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enum dma_data_direction dir,
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unsigned long attrs)
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{
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int nents;
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nents = dma_map_sg_attrs(dev, sgt->sgl, sgt->nents, dir, attrs);
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if (nents < 0)
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return (nents);
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sgt->nents = nents;
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return (0);
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}
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static inline void
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dma_unmap_sgtable(struct device *dev, struct sg_table *sgt,
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enum dma_data_direction dir,
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unsigned long attrs)
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{
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dma_unmap_sg_attrs(dev, sgt->sgl, sgt->nents, dir, attrs);
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}
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#endif /* _LINUXKPI_LINUX_DMA_MAPPING_H_ */
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