BEST_dma_device.h File Reference

Char driver for mSGDMA. More...

Go to the source code of this file.

Data Structures
struct	dma_dev_struct

Macros
#define	DMA_MAX_BUFFER_NR   32
	Number of DMA buffers.

Functions
int	dma_dev_create (struct dma_dev_struct *dev, struct class *best_class)
	Creates new DMA char device. More...
void	dma_dev_remove (struct dma_dev_struct *dev, struct class *best_class)
	Removes DMA char device. More...
void	dma_reset (struct dma_dev_struct *dev)
	Resets DMA. More...
void	dma_advance_buf (struct dma_dev_struct *dev)
	Advacnes to next buffer, returns pointer to it. More...
int	dma_dev_allocate_buffers (struct pci_dev *dev, struct dma_dev_struct *dma)
	Allocates DMA buffers. More...
void	dma_dev_free_buffers (struct pci_dev *dev, struct dma_dev_struct *dma)
	Frees DMA buffers. More...

Detailed Description

Char driver for mSGDMA.

Author

Jan Marjanovic (j.mar.nosp@m.jano.nosp@m.vic@c.nosp@m.aene.nosp@m.ls.co.nosp@m.m)

Date

June 2014

Function Documentation

void dma_advance_buf

(

struct dma_dev_struct *

dev

)

Advacnes to next buffer, returns pointer to it.

Parameters

dev	DMA structure
buf_to_write	Returns address of a buffer to write to

int dma_dev_allocate_buffers	(	struct pci_dev *	dev,
		struct dma_dev_struct *	dma
	)

Allocates DMA buffers.

Parameters

dev	PCI device
dma	DMA strucutre to allocate memory

Fields buf_number and buf_len must have valid values

int dma_dev_create	(	struct dma_dev_struct *	dev,
		struct class *	best_class
	)

Creates new DMA char device.

Parameters

dev	Structure with DMA info
best_class	Class which this device will be part of

Creates new char device, which represents FPGA mSGDMA Allowed operation on device is read(), which returns most recent data from buffers

void dma_dev_free_buffers	(	struct pci_dev *	dev,
		struct dma_dev_struct *	dma
	)

Frees DMA buffers.

Parameters

dev	PCI device
dma	DMA strucutre to allocate memory

void dma_dev_remove	(	struct dma_dev_struct *	dev,
		struct class *	best_class
	)

Removes DMA char device.

Parameters

dev	Structure with DMA info
best_class	Class which this device will be part of

void dma_reset

(

struct dma_dev_struct *

dev

)

Resets DMA.

Parameters

board

Pointer to structure with board specific data