/*===========================================================================*
* fbd_transfer_direct *
*===========================================================================*/
static ssize_t fbd_transfer_direct(int do_write, u64_t position,
endpoint_t endpt, iovec_t *iov, unsigned int count, int flags)
{
/* Forward the entire transfer request, without any intervention. */
iovec_s_t iovec[NR_IOREQS];
cp_grant_id_t grant;
message m;
int i, r;
for (i = 0; i < count; i++) {
iovec[i].iov_size = iov[i].iov_size;
iovec[i].iov_grant = cpf_grant_indirect(driver_endpt, endpt,
iov[i].iov_addr);
assert(iovec[i].iov_grant != GRANT_INVALID);
}
grant = cpf_grant_direct(driver_endpt, (vir_bytes) iovec,
count * sizeof(iovec[0]), CPF_READ);
assert(grant != GRANT_INVALID);
m.m_type = do_write ? BDEV_SCATTER : BDEV_GATHER;
m.BDEV_MINOR = driver_minor;
m.BDEV_COUNT = count;
m.BDEV_GRANT = grant;
m.BDEV_FLAGS = flags;
m.BDEV_ID = 0;
m.BDEV_POS_LO = ex64lo(position);
m.BDEV_POS_HI = ex64hi(position);
if ((r = sendrec(driver_endpt, &m)) != OK)
panic("sendrec to driver failed (%d)\n", r);
if (m.m_type != BDEV_REPLY)
panic("invalid reply from driver (%d)\n", m.m_type);
cpf_revoke(grant);
for (i = 0; i < count; i++)
cpf_revoke(iovec[i].iov_grant);
return m.BDEV_STATUS;
}
/*===========================================================================*
* fbd_transfer_direct *
*===========================================================================*/
static ssize_t fbd_transfer_direct(int do_write, u64_t position,
endpoint_t endpt, iovec_t *iov, unsigned int count, int flags)
{
/* Forward the entire transfer request, without any intervention. */
iovec_s_t iovec[NR_IOREQS];
cp_grant_id_t grant;
message m;
int i, r;
for (i = 0; i < count; i++) {
iovec[i].iov_size = iov[i].iov_size;
iovec[i].iov_grant = cpf_grant_indirect(driver_endpt, endpt,
iov[i].iov_addr);
assert(iovec[i].iov_grant != GRANT_INVALID);
}
grant = cpf_grant_direct(driver_endpt, (vir_bytes) iovec,
count * sizeof(iovec[0]), CPF_READ);
assert(grant != GRANT_INVALID);
m.m_type = do_write ? BDEV_SCATTER : BDEV_GATHER;
m.m_lbdev_lblockdriver_msg.minor = driver_minor;
m.m_lbdev_lblockdriver_msg.count = count;
m.m_lbdev_lblockdriver_msg.grant = grant;
m.m_lbdev_lblockdriver_msg.flags = flags;
m.m_lbdev_lblockdriver_msg.id = 0;
m.m_lbdev_lblockdriver_msg.pos = position;
if ((r = ipc_sendrec(driver_endpt, &m)) != OK)
panic("ipc_sendrec to driver failed (%d)\n", r);
if (m.m_type != BDEV_REPLY)
panic("invalid reply from driver (%d)\n", m.m_type);
cpf_revoke(grant);
for (i = 0; i < count; i++)
cpf_revoke(iovec[i].iov_grant);
return m.m_lblockdriver_lbdev_reply.status;
}
/*===========================================================================*
* fbd_ioctl *
*===========================================================================*/
static int fbd_ioctl(devminor_t UNUSED(minor), unsigned long request,
endpoint_t endpt, cp_grant_id_t grant, endpoint_t UNUSED(user_endpt))
{
/* Handle an I/O control request. */
cp_grant_id_t gid;
message m;
int r;
/* We only handle the FBD requests, and pass on everything else. */
switch (request) {
case FBDCADDRULE:
case FBDCDELRULE:
case FBDCGETRULE:
return rule_ctl(request, endpt, grant);
}
assert(grant != GRANT_INVALID);
gid = cpf_grant_indirect(driver_endpt, endpt, grant);
assert(gid != GRANT_INVALID);
memset(&m, 0, sizeof(m));
m.m_type = BDEV_IOCTL;
m.m_lbdev_lblockdriver_msg.minor = driver_minor;
m.m_lbdev_lblockdriver_msg.request = request;
m.m_lbdev_lblockdriver_msg.grant = gid;
m.m_lbdev_lblockdriver_msg.user = NONE;
m.m_lbdev_lblockdriver_msg.id = 0;
if ((r = ipc_sendrec(driver_endpt, &m)) != OK)
panic("ipc_sendrec to driver failed (%d)\n", r);
if (m.m_type != BDEV_REPLY)
panic("invalid reply from driver (%d)\n", m.m_type);
cpf_revoke(gid);
return m.m_lblockdriver_lbdev_reply.status;
}
/*===========================================================================*
* fbd_ioctl *
*===========================================================================*/
static int fbd_ioctl(dev_t UNUSED(minor), unsigned int request,
endpoint_t endpt, cp_grant_id_t grant)
{
/* Handle an I/O control request. */
cp_grant_id_t gid;
message m;
int r;
/* We only handle the FBD requests, and pass on everything else. */
switch (request) {
case FBDCADDRULE:
case FBDCDELRULE:
case FBDCGETRULE:
return rule_ctl(request, endpt, grant);
}
assert(grant != GRANT_INVALID);
gid = cpf_grant_indirect(driver_endpt, endpt, grant);
assert(gid != GRANT_INVALID);
memset(&m, 0, sizeof(m));
m.m_type = BDEV_IOCTL;
m.BDEV_MINOR = driver_minor;
m.BDEV_REQUEST = request;
m.BDEV_GRANT = gid;
m.BDEV_ID = 0;
if ((r = sendrec(driver_endpt, &m)) != OK)
panic("sendrec to driver failed (%d)\n", r);
if (m.m_type != BDEV_REPLY)
panic("invalid reply from driver (%d)\n", m.m_type);
cpf_revoke(gid);
return m.BDEV_STATUS;
}
