libpdma.h

/* #pragma ident "@(#)libpdma.h 1.15 04/23/07 EDT" */

/*
 * See /opt/EDTpcd/README.pdma
 */

#ifndef _LIBPDMA_H_
#define _LIBPDMA_H_

#define PDMA_MAX_SIZE (2*1024*1024)
#define PDMA_SG_SIZE (PDMA_MAX_SIZE / 2048) /* 1024 */
#define PDMA_PAGESIZE (PDMA_MAX_SIZE / 512) /* 4096 */

typedef struct {
    u_int  *dma_sglist;                    /* mmap to driver sglist     */
    u_int   dma_sglist_copy[PDMA_SG_SIZE]; /* copy of original sglist   */
    u_int  *dmacmd;                        /* mmap to SG_NXT_CNT_CTRL   */
    u_int  *dmaaddr;                       /* mmap to SG_NXT_CNT_ADDR   */
    u_int  *dmacfg;                        /* mmap to EDT_DMA_INTCFG    */
    u_int  *dmacnt;                        /* mmap to EDT_DMA_CUR_CNT   */
    u_char *off_p;                         /* mmap to intfc reg index   */
    u_char *data_p;                        /* mmap to intfc reg data    */
    u_int   dma_count;                     /* num sglist entries        */
    u_int   sv_dma_cfg;                    /* saved dma_cfg state       */
    u_int   sg_paddr;                      /* sg physical address       */
    u_int   pdma_size;                     /* max configured pdma size  */
    u_int   dma_intr_en;                   /* enable dma intr when != 0 */
    u_char **pdma_databufs;                /* pdma data buffer          */
} Pdma_t;

int     pdma_init(EdtDev *edt_p, int bufsize, int numbufs, u_char **bufs);
int     pdma_close(EdtDev *edt_p);
int     pdma_set_size(EdtDev *edt_p, int size);
int     pdma_write_databuf(EdtDev *edt_p, int bufnum, void *buf, int size);
int     pdma_start_dma(EdtDev *edt_p);
int     pdma_flush_fifo(EdtDev *edt_p);
int     pdma_abort_dma(EdtDev * edt_p);
void    pdma_dmaint_enable(EdtDev * edt_p, int enable);

#endif /* _LIBPDMA_H */

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