static int
sbsh_attach(device_t dev)
{
struct sbsh_softc *sc;
struct ifnet *ifp;
int unit, error = 0, rid;
sc = device_get_softc(dev);
unit = device_get_unit(dev);
rid = PCIR_MAPS + 4;
sc->mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
0, ~0, 4096, RF_ACTIVE);
if (sc->mem_res == NULL) {
kprintf ("sbsh%d: couldn't map memory\n", unit);
error = ENXIO;
goto fail;
}
rid = 0;
sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_SHAREABLE | RF_ACTIVE);
if (sc->irq_res == NULL) {
kprintf("sbsh%d: couldn't map interrupt\n", unit);
error = ENXIO;
goto fail;
}
sc->mem_base = rman_get_virtual(sc->mem_res);
init_card(sc);
/* generate ethernet MAC address */
*(u_int32_t *)sc->arpcom.ac_enaddr = htonl(0x00ff0192);
read_random_unlimited(sc->arpcom.ac_enaddr + 4, 2);
ifp = &sc->arpcom.ac_if;
ifp->if_softc = sc;
if_initname(ifp, "sbsh", unit);
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = sbsh_ioctl;
ifp->if_start = sbsh_start;
ifp->if_watchdog = sbsh_watchdog;
ifp->if_init = sbsh_init;
ifp->if_baudrate = 4600000;
ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
ifq_set_ready(&ifp->if_snd);
ether_ifattach(ifp, sc->arpcom.ac_enaddr, NULL);
ifq_set_cpuid(&ifp->if_snd, rman_get_cpuid(sc->irq_res));
error = bus_setup_intr(dev, sc->irq_res, INTR_MPSAFE,
sbsh_intr, sc, &sc->intr_hand,
ifp->if_serializer);
if (error) {
ether_ifdetach(ifp);
kprintf("sbsh%d: couldn't set up irq\n", unit);
goto fail;
}
return(0);
fail:
sbsh_detach(dev);
return (error);
}
static int
mmrw(cdev_t dev, struct uio *uio, int flags)
{
int o;
u_int c;
u_int poolsize;
u_long v;
struct iovec *iov;
int error = 0;
caddr_t buf = NULL;
while (uio->uio_resid > 0 && error == 0) {
iov = uio->uio_iov;
if (iov->iov_len == 0) {
uio->uio_iov++;
uio->uio_iovcnt--;
if (uio->uio_iovcnt < 0)
panic("mmrw");
continue;
}
switch (minor(dev)) {
case 0:
/*
* minor device 0 is physical memory, /dev/mem
*/
v = uio->uio_offset;
v &= ~(long)PAGE_MASK;
pmap_kenter((vm_offset_t)ptvmmap, v);
o = (int)uio->uio_offset & PAGE_MASK;
c = (u_int)(PAGE_SIZE - ((uintptr_t)iov->iov_base & PAGE_MASK));
c = min(c, (u_int)(PAGE_SIZE - o));
c = min(c, (u_int)iov->iov_len);
error = uiomove((caddr_t)&ptvmmap[o], (int)c, uio);
pmap_kremove((vm_offset_t)ptvmmap);
continue;
case 1: {
/*
* minor device 1 is kernel memory, /dev/kmem
*/
vm_offset_t saddr, eaddr;
int prot;
c = iov->iov_len;
/*
* Make sure that all of the pages are currently
* resident so that we don't create any zero-fill
* pages.
*/
saddr = trunc_page(uio->uio_offset);
eaddr = round_page(uio->uio_offset + c);
if (saddr > eaddr)
return EFAULT;
/*
* Make sure the kernel addresses are mapped.
* platform_direct_mapped() can be used to bypass
* default mapping via the page table (virtual kernels
* contain a lot of out-of-band data).
*/
prot = VM_PROT_READ;
if (uio->uio_rw != UIO_READ)
prot |= VM_PROT_WRITE;
error = kvm_access_check(saddr, eaddr, prot);
if (error)
return (error);
error = uiomove((caddr_t)(vm_offset_t)uio->uio_offset,
(int)c, uio);
continue;
}
case 2:
/*
* minor device 2 (/dev/null) is EOF/RATHOLE
*/
if (uio->uio_rw == UIO_READ)
return (0);
c = iov->iov_len;
break;
case 3:
/*
* minor device 3 (/dev/random) is source of filth
* on read, seeder on write
*/
if (buf == NULL)
buf = kmalloc(PAGE_SIZE, M_TEMP, M_WAITOK);
c = min(iov->iov_len, PAGE_SIZE);
if (uio->uio_rw == UIO_WRITE) {
error = uiomove(buf, (int)c, uio);
if (error == 0 &&
seedenable &&
securelevel <= 0) {
error = add_buffer_randomness_src(buf, c, RAND_SRC_SEEDING);
} else if (error == 0) {
error = EPERM;
}
} else {
poolsize = read_random(buf, c);
if (poolsize == 0) {
if (buf)
kfree(buf, M_TEMP);
if ((flags & IO_NDELAY) != 0)
return (EWOULDBLOCK);
return (0);
}
c = min(c, poolsize);
error = uiomove(buf, (int)c, uio);
}
continue;
case 4:
/*
* minor device 4 (/dev/urandom) is source of muck
* on read, writes are disallowed.
*/
c = min(iov->iov_len, PAGE_SIZE);
if (uio->uio_rw == UIO_WRITE) {
error = EPERM;
break;
}
if (CURSIG(curthread->td_lwp) != 0) {
/*
* Use tsleep() to get the error code right.
* It should return immediately.
*/
error = tsleep(&rand_bolt, PCATCH, "urand", 1);
if (error != 0 && error != EWOULDBLOCK)
continue;
}
if (buf == NULL)
buf = kmalloc(PAGE_SIZE, M_TEMP, M_WAITOK);
poolsize = read_random_unlimited(buf, c);
c = min(c, poolsize);
error = uiomove(buf, (int)c, uio);
continue;
case 12:
/*
* minor device 12 (/dev/zero) is source of nulls
* on read, write are disallowed.
*/
if (uio->uio_rw == UIO_WRITE) {
c = iov->iov_len;
break;
}
if (zbuf == NULL) {
zbuf = (caddr_t)kmalloc(PAGE_SIZE, M_TEMP,
M_WAITOK | M_ZERO);
}
c = min(iov->iov_len, PAGE_SIZE);
error = uiomove(zbuf, (int)c, uio);
continue;
default:
return (ENODEV);
}
if (error)
break;
iov->iov_base = (char *)iov->iov_base + c;
iov->iov_len -= c;
uio->uio_offset += c;
uio->uio_resid -= c;
}
if (buf)
kfree(buf, M_TEMP);
return (error);
}
