diff --git a/sys/compat/linuxkpi/common/include/linux/dma-mapping.h b/sys/compat/linuxkpi/common/include/linux/dma-mapping.h index 8401006fbf5f..d3d25fcce857 100644 --- a/sys/compat/linuxkpi/common/include/linux/dma-mapping.h +++ b/sys/compat/linuxkpi/common/include/linux/dma-mapping.h @@ -1,374 +1,378 @@ /*- * Copyright (c) 2010 Isilon Systems, Inc. * Copyright (c) 2010 iX Systems, Inc. * Copyright (c) 2010 Panasas, Inc. * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. * 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. * * $FreeBSD$ */ #ifndef _LINUXKPI_LINUX_DMA_MAPPING_H_ #define _LINUXKPI_LINUX_DMA_MAPPING_H_ #include #include #include #include #include #include #include #include #include #include #include #include #include #include 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, unsigned long attrs); void (*unmap_page)(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction dir, unsigned long attrs); int (*map_sg)(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction dir, unsigned long attrs); void (*unmap_sg)(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction dir, unsigned long 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) ((2ULL << ((n) - 1)) - 1ULL) int linux_dma_tag_init(struct device *, u64); int linux_dma_tag_init_coherent(struct device *, u64); void *linux_dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag); void *linuxkpi_dmam_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag); dma_addr_t linux_dma_map_phys(struct device *dev, vm_paddr_t phys, size_t len); void linux_dma_unmap(struct device *dev, dma_addr_t dma_addr, size_t size); int linux_dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction dir __unused, unsigned long attrs __unused); void linux_dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg, int nents __unused, enum dma_data_direction dir __unused, unsigned long attrs __unused); void linuxkpi_dma_sync(struct device *, dma_addr_t, size_t, bus_dmasync_op_t); static inline int dma_supported(struct device *dev, u64 dma_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_priv || !dma_supported(dev, dma_mask)) return -EIO; return (linux_dma_tag_init(dev, dma_mask)); } static inline int dma_set_coherent_mask(struct device *dev, u64 dma_mask) { if (!dev->dma_priv || !dma_supported(dev, dma_mask)) return -EIO; return (linux_dma_tag_init_coherent(dev, dma_mask)); } static inline int dma_set_mask_and_coherent(struct device *dev, u64 dma_mask) { int r; r = dma_set_mask(dev, dma_mask); if (r == 0) dma_set_coherent_mask(dev, dma_mask); return (r); } static inline void * dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag) { return (linux_dma_alloc_coherent(dev, size, dma_handle, flag)); } static inline void * dma_zalloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag) { return (dma_alloc_coherent(dev, size, dma_handle, flag | __GFP_ZERO)); } static inline void * dmam_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag) { return (linuxkpi_dmam_alloc_coherent(dev, size, dma_handle, flag)); } static inline void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr_t dma_addr) { linux_dma_unmap(dev, dma_addr, size); kmem_free(cpu_addr, size); } static inline dma_addr_t dma_map_page_attrs(struct device *dev, struct page *page, size_t offset, size_t size, enum dma_data_direction dir, unsigned long attrs) { return (linux_dma_map_phys(dev, VM_PAGE_TO_PHYS(page) + offset, size)); } /* linux_dma_(un)map_sg_attrs does not support attrs yet */ #define dma_map_sg_attrs(dev, sgl, nents, dir, attrs) \ linux_dma_map_sg_attrs(dev, sgl, nents, dir, 0) #define dma_unmap_sg_attrs(dev, sg, nents, dir, attrs) \ linux_dma_unmap_sg_attrs(dev, sg, nents, dir, 0) 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 (linux_dma_map_phys(dev, VM_PAGE_TO_PHYS(page) + offset, size)); } static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, enum dma_data_direction direction) { linux_dma_unmap(dev, dma_address, size); } static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma, size_t size, enum dma_data_direction direction) { bus_dmasync_op_t op; switch (direction) { case DMA_BIDIRECTIONAL: op = BUS_DMASYNC_POSTREAD; linuxkpi_dma_sync(dev, dma, size, op); op = BUS_DMASYNC_PREREAD; break; case DMA_TO_DEVICE: op = BUS_DMASYNC_POSTWRITE; break; case DMA_FROM_DEVICE: op = BUS_DMASYNC_POSTREAD; break; default: return; } linuxkpi_dma_sync(dev, dma, size, op); } 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, size_t size, enum dma_data_direction direction) { bus_dmasync_op_t op; switch (direction) { case DMA_BIDIRECTIONAL: op = BUS_DMASYNC_PREWRITE; break; case DMA_TO_DEVICE: op = BUS_DMASYNC_PREREAD; break; case DMA_FROM_DEVICE: op = BUS_DMASYNC_PREWRITE; break; default: return; } linuxkpi_dma_sync(dev, dma, size, op); } 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) { } +#define DMA_MAPPING_ERROR (~(dma_addr_t)0) + static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) { - return (dma_addr == 0); + if (dma_addr == 0 || dma_addr == DMA_MAPPING_ERROR) + return (-ENOMEM); + return (0); } static inline unsigned int dma_set_max_seg_size(struct device *dev, unsigned int size) { return (0); } static inline dma_addr_t _dma_map_single_attrs(struct device *dev, void *ptr, size_t size, enum dma_data_direction direction, unsigned long attrs __unused) { dma_addr_t dma; dma = linux_dma_map_phys(dev, vtophys(ptr), size); if (!dma_mapping_error(dev, dma)) dma_sync_single_for_device(dev, dma, size, direction); return (dma); } static inline void _dma_unmap_single_attrs(struct device *dev, dma_addr_t dma, size_t size, enum dma_data_direction direction, unsigned long attrs __unused) { dma_sync_single_for_cpu(dev, dma, size, direction); linux_dma_unmap(dev, dma, size); } static inline size_t dma_max_mapping_size(struct device *dev) { return (SCATTERLIST_MAX_SEGMENT); } #define dma_map_single_attrs(dev, ptr, size, dir, attrs) \ _dma_map_single_attrs(dev, ptr, size, dir, 0) #define dma_unmap_single_attrs(dev, dma_addr, size, dir, attrs) \ _dma_unmap_single_attrs(dev, dma_addr, size, dir, 0) #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, 0) #define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, 0) #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0) #define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, 0) #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 static inline int dma_map_sgtable(struct device *dev, struct sg_table *sgt, enum dma_data_direction dir, unsigned long attrs) { return (dma_map_sg_attrs(dev, sgt->sgl, sgt->nents, dir, attrs)); } static inline void dma_unmap_sgtable(struct device *dev, struct sg_table *sgt, enum dma_data_direction dir, unsigned long attrs) { dma_unmap_sg_attrs(dev, sgt->sgl, sgt->nents, dir, attrs); } #endif /* _LINUXKPI_LINUX_DMA_MAPPING_H_ */