diff options
Diffstat (limited to 'arch/arm/mach-bcmring/include/mach/dma.h')
| -rw-r--r-- | arch/arm/mach-bcmring/include/mach/dma.h | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/arch/arm/mach-bcmring/include/mach/dma.h b/arch/arm/mach-bcmring/include/mach/dma.h index 1f2c531..7254378 100644 --- a/arch/arm/mach-bcmring/include/mach/dma.h +++ b/arch/arm/mach-bcmring/include/mach/dma.h @@ -26,15 +26,9 @@ /* ---- Include Files ---------------------------------------------------- */ #include <linux/kernel.h> -#include <linux/wait.h> #include <linux/semaphore.h> #include <csp/dmacHw.h> #include <mach/timer.h> -#include <linux/scatterlist.h> -#include <linux/dma-mapping.h> -#include <linux/mm.h> -#include <linux/vmalloc.h> -#include <linux/pagemap.h> /* ---- Constants and Types ---------------------------------------------- */ @@ -113,78 +107,6 @@ typedef struct { /**************************************************************************** * -* The DMA_MemType_t and DMA_MemMap_t are helper structures used to setup -* DMA chains from a variety of memory sources. -* -*****************************************************************************/ - -#define DMA_MEM_MAP_MIN_SIZE 4096 /* Pages less than this size are better */ - /* off not being DMA'd. */ - -typedef enum { - DMA_MEM_TYPE_NONE, /* Not a valid setting */ - DMA_MEM_TYPE_VMALLOC, /* Memory came from vmalloc call */ - DMA_MEM_TYPE_KMALLOC, /* Memory came from kmalloc call */ - DMA_MEM_TYPE_DMA, /* Memory came from dma_alloc_xxx call */ - DMA_MEM_TYPE_USER, /* Memory came from user space. */ - -} DMA_MemType_t; - -/* A segment represents a physically and virtually contiguous chunk of memory. */ -/* i.e. each segment can be DMA'd */ -/* A user of the DMA code will add memory regions. Each region may need to be */ -/* represented by one or more segments. */ - -typedef struct { - void *virtAddr; /* Virtual address used for this segment */ - dma_addr_t physAddr; /* Physical address this segment maps to */ - size_t numBytes; /* Size of the segment, in bytes */ - -} DMA_Segment_t; - -/* A region represents a virtually contiguous chunk of memory, which may be */ -/* made up of multiple segments. */ - -typedef struct { - DMA_MemType_t memType; - void *virtAddr; - size_t numBytes; - - /* Each region (virtually contiguous) consists of one or more segments. Each */ - /* segment is virtually and physically contiguous. */ - - int numSegmentsUsed; - int numSegmentsAllocated; - DMA_Segment_t *segment; - - /* When a region corresponds to user memory, we need to lock all of the pages */ - /* down before we can figure out the physical addresses. The lockedPage array contains */ - /* the pages that were locked, and which subsequently need to be unlocked once the */ - /* memory is unmapped. */ - - unsigned numLockedPages; - struct page **lockedPages; - -} DMA_Region_t; - -typedef struct { - int inUse; /* Is this mapping currently being used? */ - struct semaphore lock; /* Acquired when using this structure */ - enum dma_data_direction dir; /* Direction this transfer is intended for */ - - /* In the event that we're mapping user memory, we need to know which task */ - /* the memory is for, so that we can obtain the correct mm locks. */ - - struct task_struct *userTask; - - int numRegionsUsed; - int numRegionsAllocated; - DMA_Region_t *region; - -} DMA_MemMap_t; - -/**************************************************************************** -* * The DMA_DeviceAttribute_t contains information which describes a * particular DMA device (or peripheral). * @@ -570,124 +492,6 @@ int dma_alloc_double_dst_descriptors(DMA_Handle_t handle, /* DMA Handle */ /****************************************************************************/ /** -* Initializes a DMA_MemMap_t data structure -*/ -/****************************************************************************/ - -int dma_init_mem_map(DMA_MemMap_t *memMap /* Stores state information about the map */ - ); - -/****************************************************************************/ -/** -* Releases any memory currently being held by a memory mapping structure. -*/ -/****************************************************************************/ - -int dma_term_mem_map(DMA_MemMap_t *memMap /* Stores state information about the map */ - ); - -/****************************************************************************/ -/** -* Looks at a memory address and categorizes it. -* -* @return One of the values from the DMA_MemType_t enumeration. -*/ -/****************************************************************************/ - -DMA_MemType_t dma_mem_type(void *addr); - -/****************************************************************************/ -/** -* Sets the process (aka userTask) associated with a mem map. This is -* required if user-mode segments will be added to the mapping. -*/ -/****************************************************************************/ - -static inline void dma_mem_map_set_user_task(DMA_MemMap_t *memMap, - struct task_struct *task) -{ - memMap->userTask = task; -} - -/****************************************************************************/ -/** -* Looks at a memory address and determines if we support DMA'ing to/from -* that type of memory. -* -* @return boolean - -* return value != 0 means dma supported -* return value == 0 means dma not supported -*/ -/****************************************************************************/ - -int dma_mem_supports_dma(void *addr); - -/****************************************************************************/ -/** -* Initializes a memory map for use. Since this function acquires a -* sempaphore within the memory map, it is VERY important that dma_unmap -* be called when you're finished using the map. -*/ -/****************************************************************************/ - -int dma_map_start(DMA_MemMap_t *memMap, /* Stores state information about the map */ - enum dma_data_direction dir /* Direction that the mapping will be going */ - ); - -/****************************************************************************/ -/** -* Adds a segment of memory to a memory map. -* -* @return 0 on success, error code otherwise. -*/ -/****************************************************************************/ - -int dma_map_add_region(DMA_MemMap_t *memMap, /* Stores state information about the map */ - void *mem, /* Virtual address that we want to get a map of */ - size_t numBytes /* Number of bytes being mapped */ - ); - -/****************************************************************************/ -/** -* Creates a descriptor ring from a memory mapping. -* -* @return 0 on success, error code otherwise. -*/ -/****************************************************************************/ - -int dma_map_create_descriptor_ring(DMA_Device_t dev, /* DMA device (where the ring is stored) */ - DMA_MemMap_t *memMap, /* Memory map that will be used */ - dma_addr_t devPhysAddr /* Physical address of device */ - ); - -/****************************************************************************/ -/** -* Maps in a memory region such that it can be used for performing a DMA. -* -* @return -*/ -/****************************************************************************/ - -int dma_map_mem(DMA_MemMap_t *memMap, /* Stores state information about the map */ - void *addr, /* Virtual address that we want to get a map of */ - size_t count, /* Number of bytes being mapped */ - enum dma_data_direction dir /* Direction that the mapping will be going */ - ); - -/****************************************************************************/ -/** -* Maps in a memory region such that it can be used for performing a DMA. -* -* @return -*/ -/****************************************************************************/ - -int dma_unmap(DMA_MemMap_t *memMap, /* Stores state information about the map */ - int dirtied /* non-zero if any of the pages were modified */ - ); - -/****************************************************************************/ -/** * Initiates a transfer when the descriptors have already been setup. * * This is a special case, and normally, the dma_transfer_xxx functions should |
