char *
dvma_alloc(int len)
{
char *mem;
mem = alloc(len);
if (!mem)
return (mem);
return (dvma_mapin(mem, len));
}
int
tape_strategy(void *devdata, int flag, daddr_t dblk, size_t size, void *buf,
size_t *rsize)
{
struct saioreq *si;
struct boottab *ops;
char *dmabuf;
int si_flag, xcnt;
si = devdata;
ops = si->si_boottab;
#ifdef DEBUG
if (debug > 1)
printf("tape_strategy: size=%d dblk=%d\n", size, dblk);
#endif
dmabuf = dvma_mapin(buf, size);
si->si_bn = dblk;
si->si_ma = dmabuf;
si->si_cc = size;
si_flag = (flag == F_READ) ? SAIO_F_READ : SAIO_F_WRITE;
xcnt = (*ops->b_strategy)(si, si_flag);
dvma_mapout(dmabuf, size);
#ifdef DEBUG
if (debug > 1)
printf("tape_strategy: xcnt = %x\n", xcnt);
#endif
/* At end of tape, xcnt == 0 (not an error) */
if (xcnt < 0)
return (EIO);
*rsize = xcnt;
return (0);
}
