umem.c File Reference

#include <linux/mm.h>
#include <linux/dma-mapping.h>
#include <linux/sched.h>
#include <linux/export.h>
#include <linux/hugetlb.h>
#include <linux/dma-attrs.h>
#include <linux/slab.h>
#include "uverbs.h"

Go to the source code of this file.

Macros
#define	IB_UMEM_MAX_PAGE_CHUNK

Functions
struct ib_umem *	ib_umem_get (struct ib_ucontext *context, unsigned long addr, size_t size, int access, int dmasync)
	EXPORT_SYMBOL (ib_umem_get)
void	ib_umem_release (struct ib_umem *umem)
	EXPORT_SYMBOL (ib_umem_release)
int	ib_umem_page_count (struct ib_umem *umem)
	EXPORT_SYMBOL (ib_umem_page_count)

Macro Definition Documentation

#define IB_UMEM_MAX_PAGE_CHUNK

Value:

((PAGE_SIZE - offsetof(struct ib_umem_chunk, page_list)) /  \
     ((void *) &((struct ib_umem_chunk *) 0)->page_list[1] -    \
      (void *) &((struct ib_umem_chunk *) 0)->page_list[0]))

Definition at line 45 of file umem.c.

Function Documentation

EXPORT_SYMBOL

(

ib_umem_get

)

EXPORT_SYMBOL

(

ib_umem_release

)

EXPORT_SYMBOL

(

ib_umem_page_count

)

struct ib_umem* ib_umem_get ( struct ib_ucontext *  context, unsigned long  addr, size_t  size, int  access, int  dmasync  )

read

ib_umem_get - Pin and DMA map userspace memory. : userspace context to pin memory for : userspace virtual address to start at : length of region to pin : IB_ACCESS_xxx flags for memory being pinned : flush in-flight DMA when the memory region is written

Definition at line 78 of file umem.c.

int ib_umem_page_count

(

struct ib_umem *

umem

)

Definition at line 279 of file umem.c.

void ib_umem_release

(

struct ib_umem *

umem

)

ib_umem_release - release memory pinned with ib_umem_get : umem struct to release

Definition at line 236 of file umem.c.