diff options
| author | Russell King <rmk+cubox@arm.linux.org.uk> | 2013-12-08 21:29:56 +0000 |
|---|---|---|
| committer | Russell King <rmk@arm.linux.org.uk> | 2013-12-08 22:02:42 +0000 |
| commit | 6f2e8ec4c736fbffe3d0e0f1ec07f453910441a1 (patch) | |
| tree | 3adfc685d5addab0a3d7a609a0d620b0046a6bee /bmm_lib_priv.h | |
| parent | dcad449e26e81b71e4a498dc5bfaf014a5566acd (diff) | |
This is a complete redesign and rewrite of libbmm. This implementation
is based upon dma_bufs - where a dma_buf is a kernel-side buffer which
can be passed to and from other subsystems. libbmm becomes a provider
of dma_bufs - it permits userspace to allocate such things.
When a dma_buf is allocated, userspace is handed a file descriptor
which is unique to this buffer. This file descriptor can then be
passed into other subsystems, which can then request access to this
buffer.
The file descriptor supports very few operations - it can be mmap()d to
provide userspace access to the buffer, and it can be closed when it is
no longer required. Internally in the kernel, dma_bufs are reference
counted, so the dma_buf will only be freed when the last user gives up
its reference.
Diffstat (limited to 'bmm_lib_priv.h')
| -rw-r--r-- | bmm_lib_priv.h | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/bmm_lib_priv.h b/bmm_lib_priv.h deleted file mode 100644 index 42d4e64..0000000 --- a/bmm_lib_priv.h +++ /dev/null @@ -1,51 +0,0 @@ -/* - * bmm_lib_priv.h - * - * Buffer Management Module - * - * User level BMM Defines/Globals/Functions - * - * Li Li (lea.li@marvell.com) - - *(C) Copyright 2007 Marvell International Ltd. - * All Rights Reserved - */ - -#ifndef __BMM_LIB_PRIV_H__ -#define __BMM_LIB_PRIV_H__ - -#define BMM_MINOR (94) - -typedef struct { - unsigned long input; /* the starting address of the block of memory */ - unsigned long output; /* the starting address of the block of memory */ - unsigned long length; /* the length of the block of memory */ - unsigned long arg; /* the arg of cmd */ -} ioctl_arg_t; - -#define BMEM_IOCTL_MAGIC 'G' -/* ioctl commands */ -#define BMM_MALLOC _IOWR(BMEM_IOCTL_MAGIC, 0, ioctl_arg_t) -#define BMM_FREE _IOWR(BMEM_IOCTL_MAGIC, 1, ioctl_arg_t) -#define BMM_GET_VIRT_ADDR _IOWR(BMEM_IOCTL_MAGIC, 2, ioctl_arg_t) -#define BMM_GET_PHYS_ADDR _IOWR(BMEM_IOCTL_MAGIC, 3, ioctl_arg_t) -#define BMM_GET_MEM_ATTR _IOWR(BMEM_IOCTL_MAGIC, 4, ioctl_arg_t) -#define BMM_SET_MEM_ATTR _IOWR(BMEM_IOCTL_MAGIC, 5, ioctl_arg_t) -#define BMM_GET_MEM_SIZE _IOWR(BMEM_IOCTL_MAGIC, 6, ioctl_arg_t) -#define BMM_GET_TOTAL_SPACE _IOWR(BMEM_IOCTL_MAGIC, 7, ioctl_arg_t) -#define BMM_GET_FREE_SPACE _IOWR(BMEM_IOCTL_MAGIC, 8, ioctl_arg_t) -#define BMM_FLUSH_CACHE _IOWR(BMEM_IOCTL_MAGIC, 9, ioctl_arg_t) -#define BMM_CONSISTENT_SYNC _IOWR(BMEM_IOCTL_MAGIC, 12, ioctl_arg_t) -#define BMM_DUMP _IOWR(BMEM_IOCTL_MAGIC, 13, ioctl_arg_t) -#define BMM_GET_ALLOCATED_SPACE _IOWR(BMEM_IOCTL_MAGIC, 14, ioctl_arg_t) -#define BMM_GET_KERN_PHYS_ADDR _IOWR(BMEM_IOCTL_MAGIC, 15, ioctl_arg_t) -#define BMM_SYNC_USER _IOWR(BMEM_IOCTL_MAGIC, 16, ioctl_arg_t) -#define BMM_MALLOC_ALIGNED _IOWR(BMEM_IOCTL_MAGIC, 17, ioctl_arg_t) -#define BMM_API_VERSION _IOWR(BMEM_IOCTL_MAGIC, 18, ioctl_arg_t) -#define BMM_GET_DMABUF_FD _IOWR(BMEM_IOCTL_MAGIC, 19, ioctl_arg_t) -#define BMM_FREE_PHYS _IOWR(BMEM_IOCTL_MAGIC, 20, ioctl_arg_t) -#define BMM_GET_PHYS_DMABUF_FD _IOWR(BMEM_IOCTL_MAGIC, 21, ioctl_arg_t) - -#define BMM_DEVICE_FILE "/dev/bmm" - -#endif /* __BMM_LIB_PRIV_H__ */ |