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Diffstat (limited to 'sys/ofed/include/linux/dma-mapping.h')
| -rw-r--r-- | sys/ofed/include/linux/dma-mapping.h | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/sys/ofed/include/linux/dma-mapping.h b/sys/ofed/include/linux/dma-mapping.h new file mode 100644 index 0000000..c653524 --- /dev/null +++ b/sys/ofed/include/linux/dma-mapping.h @@ -0,0 +1,263 @@ +/*- + * Copyright (c) 2010 Isilon Systems, Inc. + * Copyright (c) 2010 iX Systems, Inc. + * Copyright (c) 2010 Panasas, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice unmodified, this list of conditions, and the following + * disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#ifndef _LINUX_DMA_MAPPING_H_ +#define _LINUX_DMA_MAPPING_H_ + +#include <linux/types.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/dma-attrs.h> +#include <linux/scatterlist.h> +#include <linux/mm.h> +#include <linux/page.h> + +#include <sys/systm.h> +#include <sys/malloc.h> + +#include <vm/vm.h> +#include <vm/vm_page.h> +#include <vm/pmap.h> + +#include <machine/bus.h> +#include <machine/pmap.h> + +enum dma_data_direction { + DMA_BIDIRECTIONAL = 0, + DMA_TO_DEVICE = 1, + DMA_FROM_DEVICE = 2, + DMA_NONE = 3, +}; + +struct dma_map_ops { + void* (*alloc_coherent)(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp); + void (*free_coherent)(struct device *dev, size_t size, + void *vaddr, dma_addr_t dma_handle); + dma_addr_t (*map_page)(struct device *dev, struct page *page, + unsigned long offset, size_t size, enum dma_data_direction dir, + struct dma_attrs *attrs); + void (*unmap_page)(struct device *dev, dma_addr_t dma_handle, + size_t size, enum dma_data_direction dir, struct dma_attrs *attrs); + int (*map_sg)(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction dir, struct dma_attrs *attrs); + void (*unmap_sg)(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction dir, struct dma_attrs *attrs); + void (*sync_single_for_cpu)(struct device *dev, dma_addr_t dma_handle, + size_t size, enum dma_data_direction dir); + void (*sync_single_for_device)(struct device *dev, + dma_addr_t dma_handle, size_t size, enum dma_data_direction dir); + void (*sync_single_range_for_cpu)(struct device *dev, + dma_addr_t dma_handle, unsigned long offset, size_t size, + enum dma_data_direction dir); + void (*sync_single_range_for_device)(struct device *dev, + dma_addr_t dma_handle, unsigned long offset, size_t size, + enum dma_data_direction dir); + void (*sync_sg_for_cpu)(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction dir); + void (*sync_sg_for_device)(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction dir); + int (*mapping_error)(struct device *dev, dma_addr_t dma_addr); + int (*dma_supported)(struct device *dev, u64 mask); + int is_phys; +}; + +#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL << (n)) - 1)) + +static inline int +dma_supported(struct device *dev, u64 mask) +{ + + /* XXX busdma takes care of this elsewhere. */ + return (1); +} + +static inline int +dma_set_mask(struct device *dev, u64 dma_mask) +{ + + if (!dev->dma_mask || !dma_supported(dev, dma_mask)) + return -EIO; + + *dev->dma_mask = dma_mask; + return (0); +} + +static inline int +dma_set_coherent_mask(struct device *dev, u64 mask) +{ + + if (!dma_supported(dev, mask)) + return -EIO; + /* XXX Currently we don't support a seperate coherent mask. */ + return 0; +} + +static inline void * +dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, + gfp_t flag) +{ + vm_paddr_t high; + size_t align; + void *mem; + + if (dev->dma_mask) + high = *dev->dma_mask; + else + high = BUS_SPACE_MAXADDR_32BIT; + align = PAGE_SIZE << get_order(size); + mem = (void *)kmem_alloc_contig(kmem_map, size, flag, 0, high, align, + 0, VM_MEMATTR_DEFAULT); + if (mem) + *dma_handle = vtophys(mem); + else + *dma_handle = 0; + return (mem); +} + +static inline void +dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, + dma_addr_t dma_handle) +{ + + kmem_free(kmem_map, (vm_offset_t)cpu_addr, size); +} + +/* XXX This only works with no iommu. */ +static inline dma_addr_t +dma_map_single_attrs(struct device *dev, void *ptr, size_t size, + enum dma_data_direction dir, struct dma_attrs *attrs) +{ + + return vtophys(ptr); +} + +static inline void +dma_unmap_single_attrs(struct device *dev, dma_addr_t addr, size_t size, + enum dma_data_direction dir, struct dma_attrs *attrs) +{ +} + +static inline int +dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl, int nents, + enum dma_data_direction dir, struct dma_attrs *attrs) +{ + struct scatterlist *sg; + int i; + + for_each_sg(sgl, sg, nents, i) + sg_dma_address(sg) = sg_phys(sg); + + return (nents); +} + +static inline void +dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction dir, struct dma_attrs *attrs) +{ +} + +static inline dma_addr_t +dma_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, enum dma_data_direction direction) +{ + + return VM_PAGE_TO_PHYS(page) + offset; +} + +static inline void +dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, + enum dma_data_direction direction) +{ +} + +static inline void +dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, + enum dma_data_direction direction) +{ +} + +static inline void +dma_sync_single(struct device *dev, dma_addr_t addr, size_t size, + enum dma_data_direction dir) +{ + dma_sync_single_for_cpu(dev, addr, size, dir); +} + +static inline void +dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, + size_t size, enum dma_data_direction direction) +{ +} + +static inline void +dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, + enum dma_data_direction direction) +{ +} + +static inline void +dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, + enum dma_data_direction direction) +{ +} + +static inline void +dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle, + unsigned long offset, size_t size, int direction) +{ +} + +static inline void +dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle, + unsigned long offset, size_t size, int direction) +{ +} + +static inline int +dma_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + + return (0); +} + +#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL) +#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL) +#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL) +#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL) + +#define DEFINE_DMA_UNMAP_ADDR(name) dma_addr_t name +#define DEFINE_DMA_UNMAP_LEN(name) __u32 name +#define dma_unmap_addr(p, name) ((p)->name) +#define dma_unmap_addr_set(p, name, v) (((p)->name) = (v)) +#define dma_unmap_len(p, name) ((p)->name) +#define dma_unmap_len_set(p, name, v) (((p)->name) = (v)) + +extern int uma_align_cache; +#define dma_get_cache_alignment() uma_align_cache + +#endif /* _LINUX_DMA_MAPPING_H_ */ |
