aboutsummaryrefslogtreecommitdiff
path: root/sys/compat/linuxkpi/common/include/linux/dma-mapping.h
diff options
context:
space:
mode:
Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/dma-mapping.h')
-rw-r--r--sys/compat/linuxkpi/common/include/linux/dma-mapping.h281
1 files changed, 281 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/dma-mapping.h b/sys/compat/linuxkpi/common/include/linux/dma-mapping.h
new file mode 100644
index 000000000000..da08751d31de
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/dma-mapping.h
@@ -0,0 +1,281 @@
+/*-
+ * 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 _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) ((2ULL << ((n) - 1)) - 1ULL)
+
+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_arena, 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_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
+dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
+ dma_addr_t dma_handle)
+{
+
+ kmem_free(kmem_arena, (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);
+}
+
+static inline unsigned int dma_set_max_seg_size(struct device *dev,
+ unsigned int size)
+{
+ 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_ */