Xilinx FPGA PCIE Linux驱动程序

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//-------------------------------------------------------------------------------- //-- Filename: xbmd.c //--

//-- Description: XBMD device driver. //--

//-- XBMD is an example Red Hat device driver which exercises XBMD design //-- Device driver has been tested on Red Hat Fedora FC9 2.6.15.

//--------------------------------------------------------------------------------

#include #include #include

#include #include

//#include //#include

#include/* copy_to_user */

#include\

// semaphores enum {

SEM_READ, SEM_WRITE, SEM_WRITEREG, SEM_READREG, SEM_WAITFOR, SEM_DMA, NUM_SEMS };

#define SUCCESS 0 #define CRIT_ERR -1

// Debug - define will output more info #define Verbose 1

// Max DMA Buffer Size

#define BUF_SIZE (4096 * 1024)

enum {

INITCARD, // 0 INITRST, DISPREGS, RDDCSR, RDDDMACR,

RDWDMATLPA, // 5 RDWDMATLPS, RDWDMATLPC, RDWDMATLPP, RDRDMATLPP,

RDRDMATLPA, // 10 RDRDMATLPS, RDRDMATLPC, RDWDMAPERF, RDRDMAPERF,

RDRDMASTAT, // 15 RDNRDCOMP, RDRCOMPDSIZE, RDDLWSTAT, RDDLTRSSTAT,

RDDMISCCONT, // 20

RDDMISCONT, RDDLNKC, DFCCTL, DFCPINFO,

DFCNPINFO, // 25 DFCINFO,

RDCFGREG, WRCFGREG, RDBMDREG,

WRBMDREG, // 30

WRDDMACR, WRWDMATLPS, WRWDMATLPC, WRWDMATLPP, WRRDMATLPS, WRRDMATLPC, WRRDMATLPP, WRDMISCCONT, WRDDLNKC,

NUMCOMMANDS };

//semaphores

struct semaphore gSem[NUM_SEMS];

MODULE_LICENSE(\);

// Defines the Vendor ID. Must be changed if core generated did not set the Vendor ID to the same value

#define PCI_VENDOR_ID_XILINX 0x10ee

// Defines the Device ID. Must be changed if core generated did not set the Device ID to the same value

#define PCI_DEVICE_ID_XILINX_PCIE 0x0007

// Defining

#define XBMD_REGISTER_SIZE (4*8) // There are eight registers, and each is 4 bytes wide. #define HAVE_REGION 0x01 // I/O Memory region #define HAVE_IRQ 0x02 // Interupt

//Status Flags:

// 1 = Resouce successfully acquired // 0 = Resource not acquired.

#define HAVE_REGION 0x01 // I/O Memory region #define HAVE_IRQ 0x02 // Interupt

#define HAVE_KREG 0x04 // Kernel registration

int gDrvrMajor = 241; // Major number not dynamic. unsignedint gStatFlags = 0x00; // Status flags used for cleanup.

unsignedlong gBaseHdwr; // Base register address (Hardware address) unsignedlong gBaseLen; // Base register address Length

void *gBaseVirt = NULL; // Base register address (Virtual address, for I/O). char gDrvrName[]= \; // Name of driver in proc. struct pci_dev *gDev = NULL; // PCI device structure.

int gIrq; // IRQ assigned by PCI system.

char *gBufferUnaligned = NULL; // Pointer to Unaligned DMA buffer. char *gReadBuffer = NULL; // Pointer to dword aligned DMA buffer. char *gWriteBuffer = NULL; // Pointer to dword aligned DMA buffer. dma_addr_t gReadHWAddr; dma_addr_t gWriteHWAddr; unsignedlong SA_SHIRQ = 0;

unsignedlong SA_SAMPLE_RANDOM = 0;

int pos;

// Struct Used for Writing CFG Register. Holds value and register to be written typedefstruct cfgwrite { int reg; int value; } cfgwr;

// Struct Used for Writing BMD Register. Holds value and register to be written typedefstruct bmdwrite { int reg; int value; } bmdwr;

//----------------------------------------------------------------------------- // Prototypes

//-----------------------------------------------------------------------------

void XPCIe_IRQHandler (int irq, void *dev_id, struct pt_regs *regs); u32 XPCIe_ReadReg (u32 dw_offset);

void XPCIe_WriteReg (u32 dw_offset, u32 val); void XPCIe_InitCard (void);

void XPCIe_InitiatorReset (void); u32 XPCIe_ReadCfgReg (u32 byte);

u32 XPCIe_WriteCfgReg (u32 byte, u32 value);

//--------------------------------------------------------------------------- // Name: XPCIe_Open //

// Description: Book keeping routine invoked each time the device is opened. //

// Arguments: inode : // filp : //

// Returns: 0 on success, error code on failure. //

// Modification log:

// Date Who Description //

//--------------------------------------------------------------------------- int XPCIe_Open(struct inode *inode, struct file *filp) {

printk(KERN_INFO\,gDrvrName); return SUCCESS;

}

//--------------------------------------------------------------------------- // Name: XPCIe_Release //

// Description: Book keeping routine invoked each time the device is closed. //

// Arguments: inode : // filp : //

// Returns: 0 on success, error code on failure. //

// Modification log:

// Date Who Description //

//--------------------------------------------------------------------------- int XPCIe_Release(struct inode *inode, struct file *filp) {

printk(KERN_INFO\,gDrvrName); return(SUCCESS); }

//--------------------------------------------------------------------------- // Name: XPCIe_Write //

// Description: This routine is invoked from user space to write data to // the PCIe device. //

// Arguments: filp : file pointer to opened device.

// buf : pointer to location in users space, where data is to // be acquired.

// count : Amount of data in bytes user wishes to send. //

// Returns: SUCCESS = Success

// CRIT_ERR = Critical failure //

// Modification log:

// Date Who Description //

//---------------------------------------------------------------------------

ssize_t XPCIe_Write(struct file *filp, constchar *buf, size_t count, loff_t *f_pos) {

int ret = SUCCESS;

memcpy((char *)gWriteBuffer, buf, count);

printk(KERN_INFO\, gDrvrName, count); memcpy((char *)gReadBuffer, buf, count);

printk(KERN_INFO\, gDrvrName, count); return (ret); }

//--------------------------------------------------------------------------- // Name: XPCIe_Read //

// Description: This routine is invoked from user space to read data from // the PCIe device. ***NOTE: This routine returns the entire

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