2008-02-03 06:06:26 -07:00
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#ifndef _LINUX_DMA_MAPPING_H
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#define _LINUX_DMA_MAPPING_H
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2005-04-16 16:20:36 -06:00
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#include <linux/device.h>
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#include <linux/err.h>
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2009-01-05 07:59:01 -07:00
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#include <linux/dma-attrs.h>
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#include <linux/scatterlist.h>
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2005-04-16 16:20:36 -06:00
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/* These definitions mirror those in pci.h, so they can be used
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* interchangeably with their PCI_ counterparts */
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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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2009-01-05 07:59:01 -07:00
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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,
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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,
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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,
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struct dma_attrs *attrs);
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void (*unmap_sg)(struct device *dev,
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struct scatterlist *sg, int nents,
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enum dma_data_direction dir,
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struct dma_attrs *attrs);
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void (*sync_single_for_cpu)(struct device *dev,
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dma_addr_t dma_handle, size_t size,
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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,
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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,
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unsigned long offset,
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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,
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unsigned long offset,
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size_t size,
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enum dma_data_direction dir);
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void (*sync_sg_for_cpu)(struct device *dev,
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struct scatterlist *sg, int nents,
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enum dma_data_direction dir);
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void (*sync_sg_for_device)(struct device *dev,
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struct scatterlist *sg, int nents,
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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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2007-10-18 04:05:07 -06:00
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#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
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2007-10-18 04:05:06 -06:00
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2007-10-18 04:05:07 -06:00
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/*
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* NOTE: do not use the below macros in new code and do not add new definitions
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* here.
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*
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* Instead, just open-code DMA_BIT_MASK(n) within your driver
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*/
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#define DMA_64BIT_MASK DMA_BIT_MASK(64)
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2007-10-18 04:05:06 -06:00
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#define DMA_48BIT_MASK DMA_BIT_MASK(48)
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#define DMA_47BIT_MASK DMA_BIT_MASK(47)
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#define DMA_40BIT_MASK DMA_BIT_MASK(40)
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#define DMA_39BIT_MASK DMA_BIT_MASK(39)
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#define DMA_35BIT_MASK DMA_BIT_MASK(35)
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#define DMA_32BIT_MASK DMA_BIT_MASK(32)
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#define DMA_31BIT_MASK DMA_BIT_MASK(31)
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#define DMA_30BIT_MASK DMA_BIT_MASK(30)
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#define DMA_29BIT_MASK DMA_BIT_MASK(29)
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#define DMA_28BIT_MASK DMA_BIT_MASK(28)
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#define DMA_24BIT_MASK DMA_BIT_MASK(24)
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2005-04-16 16:20:36 -06:00
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2007-10-16 02:23:55 -06:00
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#define DMA_MASK_NONE 0x0ULL
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2006-09-29 02:59:48 -06:00
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static inline int valid_dma_direction(int dma_direction)
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{
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return ((dma_direction == DMA_BIDIRECTIONAL) ||
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(dma_direction == DMA_TO_DEVICE) ||
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(dma_direction == DMA_FROM_DEVICE));
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}
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2007-10-16 02:23:55 -06:00
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static inline int is_device_dma_capable(struct device *dev)
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{
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return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE;
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}
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2008-09-09 10:06:46 -06:00
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static inline int is_buffer_dma_capable(u64 mask, dma_addr_t addr, size_t size)
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{
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return addr + size <= mask;
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}
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2007-07-16 00:40:26 -06:00
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#ifdef CONFIG_HAS_DMA
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2005-04-16 16:20:36 -06:00
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#include <asm/dma-mapping.h>
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2007-07-16 00:40:26 -06:00
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#else
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#include <asm-generic/dma-mapping-broken.h>
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#endif
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2005-04-16 16:20:36 -06:00
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/* Backwards compat, remove in 2.7.x */
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#define dma_sync_single dma_sync_single_for_cpu
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#define dma_sync_sg dma_sync_sg_for_cpu
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2008-09-12 04:42:34 -06:00
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static inline u64 dma_get_mask(struct device *dev)
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{
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2008-09-18 11:02:05 -06:00
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if (dev && dev->dma_mask && *dev->dma_mask)
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2008-09-12 04:42:34 -06:00
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return *dev->dma_mask;
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2009-04-06 20:01:15 -06:00
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return DMA_BIT_MASK(32);
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2008-09-12 04:42:34 -06:00
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}
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2005-04-16 16:20:36 -06:00
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extern u64 dma_get_required_mask(struct device *dev);
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2008-02-04 23:27:55 -07:00
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static inline unsigned int dma_get_max_seg_size(struct device *dev)
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{
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return dev->dma_parms ? dev->dma_parms->max_segment_size : 65536;
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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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if (dev->dma_parms) {
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dev->dma_parms->max_segment_size = size;
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return 0;
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} else
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return -EIO;
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}
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2008-02-04 23:28:13 -07:00
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static inline unsigned long dma_get_seg_boundary(struct device *dev)
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{
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return dev->dma_parms ?
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dev->dma_parms->segment_boundary_mask : 0xffffffff;
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}
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static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
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{
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if (dev->dma_parms) {
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dev->dma_parms->segment_boundary_mask = mask;
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return 0;
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} else
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return -EIO;
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}
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2005-04-16 16:20:36 -06:00
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/* flags for the coherent memory api */
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#define DMA_MEMORY_MAP 0x01
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#define DMA_MEMORY_IO 0x02
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#define DMA_MEMORY_INCLUDES_CHILDREN 0x04
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#define DMA_MEMORY_EXCLUSIVE 0x08
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#ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
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static inline int
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dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
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dma_addr_t device_addr, size_t size, int flags)
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{
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return 0;
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}
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static inline void
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dma_release_declared_memory(struct device *dev)
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{
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}
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static inline void *
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dma_mark_declared_memory_occupied(struct device *dev,
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dma_addr_t device_addr, size_t size)
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{
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return ERR_PTR(-EBUSY);
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}
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#endif
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devres: device resource management
Implement device resource management, in short, devres. A device
driver can allocate arbirary size of devres data which is associated
with a release function. On driver detach, release function is
invoked on the devres data, then, devres data is freed.
devreses are typed by associated release functions. Some devreses are
better represented by single instance of the type while others need
multiple instances sharing the same release function. Both usages are
supported.
devreses can be grouped using devres group such that a device driver
can easily release acquired resources halfway through initialization
or selectively release resources (e.g. resources for port 1 out of 4
ports).
This patch adds devres core including documentation and the following
managed interfaces.
* alloc/free : devm_kzalloc(), devm_kzfree()
* IO region : devm_request_region(), devm_release_region()
* IRQ : devm_request_irq(), devm_free_irq()
* DMA : dmam_alloc_coherent(), dmam_free_coherent(),
dmam_declare_coherent_memory(), dmam_pool_create(),
dmam_pool_destroy()
* PCI : pcim_enable_device(), pcim_pin_device(), pci_is_managed()
* iomap : devm_ioport_map(), devm_ioport_unmap(), devm_ioremap(),
devm_ioremap_nocache(), devm_iounmap(), pcim_iomap_table(),
pcim_iomap(), pcim_iounmap()
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-01-20 00:00:26 -07:00
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/*
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* Managed DMA API
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*/
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extern void *dmam_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t gfp);
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extern void dmam_free_coherent(struct device *dev, size_t size, void *vaddr,
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dma_addr_t dma_handle);
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extern void *dmam_alloc_noncoherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t gfp);
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extern void dmam_free_noncoherent(struct device *dev, size_t size, void *vaddr,
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dma_addr_t dma_handle);
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#ifdef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
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extern int dmam_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
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dma_addr_t device_addr, size_t size,
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int flags);
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extern void dmam_release_declared_memory(struct device *dev);
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#else /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */
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static inline int dmam_declare_coherent_memory(struct device *dev,
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dma_addr_t bus_addr, dma_addr_t device_addr,
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size_t size, gfp_t gfp)
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{
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return 0;
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}
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2005-04-16 16:20:36 -06:00
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devres: device resource management
Implement device resource management, in short, devres. A device
driver can allocate arbirary size of devres data which is associated
with a release function. On driver detach, release function is
invoked on the devres data, then, devres data is freed.
devreses are typed by associated release functions. Some devreses are
better represented by single instance of the type while others need
multiple instances sharing the same release function. Both usages are
supported.
devreses can be grouped using devres group such that a device driver
can easily release acquired resources halfway through initialization
or selectively release resources (e.g. resources for port 1 out of 4
ports).
This patch adds devres core including documentation and the following
managed interfaces.
* alloc/free : devm_kzalloc(), devm_kzfree()
* IO region : devm_request_region(), devm_release_region()
* IRQ : devm_request_irq(), devm_free_irq()
* DMA : dmam_alloc_coherent(), dmam_free_coherent(),
dmam_declare_coherent_memory(), dmam_pool_create(),
dmam_pool_destroy()
* PCI : pcim_enable_device(), pcim_pin_device(), pci_is_managed()
* iomap : devm_ioport_map(), devm_ioport_unmap(), devm_ioremap(),
devm_ioremap_nocache(), devm_iounmap(), pcim_iomap_table(),
pcim_iomap(), pcim_iounmap()
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-01-20 00:00:26 -07:00
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static inline void dmam_release_declared_memory(struct device *dev)
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{
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}
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#endif /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */
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2005-04-16 16:20:36 -06:00
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2008-04-29 02:00:30 -06:00
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#ifndef CONFIG_HAVE_DMA_ATTRS
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struct dma_attrs;
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#define dma_map_single_attrs(dev, cpu_addr, size, dir, attrs) \
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dma_map_single(dev, cpu_addr, size, dir)
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#define dma_unmap_single_attrs(dev, dma_addr, size, dir, attrs) \
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dma_unmap_single(dev, dma_addr, size, dir)
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#define dma_map_sg_attrs(dev, sgl, nents, dir, attrs) \
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dma_map_sg(dev, sgl, nents, dir)
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#define dma_unmap_sg_attrs(dev, sgl, nents, dir, attrs) \
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dma_unmap_sg(dev, sgl, nents, dir)
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#endif /* CONFIG_HAVE_DMA_ATTRS */
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devres: device resource management
Implement device resource management, in short, devres. A device
driver can allocate arbirary size of devres data which is associated
with a release function. On driver detach, release function is
invoked on the devres data, then, devres data is freed.
devreses are typed by associated release functions. Some devreses are
better represented by single instance of the type while others need
multiple instances sharing the same release function. Both usages are
supported.
devreses can be grouped using devres group such that a device driver
can easily release acquired resources halfway through initialization
or selectively release resources (e.g. resources for port 1 out of 4
ports).
This patch adds devres core including documentation and the following
managed interfaces.
* alloc/free : devm_kzalloc(), devm_kzfree()
* IO region : devm_request_region(), devm_release_region()
* IRQ : devm_request_irq(), devm_free_irq()
* DMA : dmam_alloc_coherent(), dmam_free_coherent(),
dmam_declare_coherent_memory(), dmam_pool_create(),
dmam_pool_destroy()
* PCI : pcim_enable_device(), pcim_pin_device(), pci_is_managed()
* iomap : devm_ioport_map(), devm_ioport_unmap(), devm_ioremap(),
devm_ioremap_nocache(), devm_iounmap(), pcim_iomap_table(),
pcim_iomap(), pcim_iounmap()
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-01-20 00:00:26 -07:00
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#endif
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