/*==========================================================================*
* do_umap_remote *
*==========================================================================*/
int do_umap_remote(struct proc * caller, message * m_ptr)
{
/* Map virtual address to physical, for non-kernel processes. */
int seg_type = m_ptr->CP_SRC_SPACE & SEGMENT_TYPE;
int seg_index = m_ptr->CP_SRC_SPACE & SEGMENT_INDEX;
vir_bytes offset = m_ptr->CP_SRC_ADDR;
int count = m_ptr->CP_NR_BYTES;
int endpt = (int) m_ptr->CP_SRC_ENDPT;
endpoint_t grantee = (endpoint_t) m_ptr->CP_DST_ENDPT;
int proc_nr, proc_nr_grantee;
int naughty = 0;
phys_bytes phys_addr = 0, lin_addr = 0;
struct proc *targetpr;
/* Verify process number. */
if (endpt == SELF)
proc_nr = _ENDPOINT_P(caller->p_endpoint);
else
if (! isokendpt(endpt, &proc_nr))
return(EINVAL);
targetpr = proc_addr(proc_nr);
/* Verify grantee endpoint */
if (grantee == SELF) {
grantee = caller->p_endpoint;
} else if (grantee == NONE ||
grantee == ANY ||
seg_index != MEM_GRANT ||
!isokendpt(grantee, &proc_nr_grantee)) {
return EINVAL;
}
/* See which mapping should be made. */
switch(seg_type) {
case LOCAL_SEG:
phys_addr = lin_addr = umap_local(targetpr, seg_index, offset, count);
if(!lin_addr) return EFAULT;
naughty = 1;
break;
case LOCAL_VM_SEG:
if(seg_index == MEM_GRANT) {
vir_bytes newoffset;
endpoint_t newep;
int new_proc_nr;
cp_grant_id_t grant = (cp_grant_id_t) offset;
if(verify_grant(targetpr->p_endpoint, grantee, grant, count,
0, 0, &newoffset, &newep) != OK) {
printf("SYSTEM: do_umap: verify_grant in %s, grant %d, bytes 0x%lx, failed, caller %s\n", targetpr->p_name, offset, count, caller->p_name);
proc_stacktrace(caller);
return EFAULT;
}
if(!isokendpt(newep, &new_proc_nr)) {
printf("SYSTEM: do_umap: isokendpt failed\n");
return EFAULT;
}
/* New lookup. */
offset = newoffset;
targetpr = proc_addr(new_proc_nr);
seg_index = D;
}
if(seg_index == T || seg_index == D || seg_index == S) {
phys_addr = lin_addr = umap_local(targetpr, seg_index, offset, count);
} else {
printf("SYSTEM: bogus seg type 0x%lx\n", seg_index);
return EFAULT;
}
if(!lin_addr) {
printf("SYSTEM:do_umap: umap_local failed\n");
return EFAULT;
}
if(vm_lookup(targetpr, lin_addr, &phys_addr, NULL) != OK) {
printf("SYSTEM:do_umap: vm_lookup failed\n");
return EFAULT;
}
if(phys_addr == 0)
panic("vm_lookup returned zero physical address");
break;
default:
printf("umap: peculiar type\n");
return EINVAL;
}
if(vm_running && vm_lookup_range(targetpr, lin_addr, NULL, count) != count) {
printf("SYSTEM:do_umap: not contiguous\n");
return EFAULT;
}
m_ptr->CP_DST_ADDR = phys_addr;
if(naughty || phys_addr == 0) {
printf("kernel: umap 0x%x done by %d / %s, pc 0x%lx, 0x%lx -> 0x%lx\n",
seg_type, caller->p_endpoint, caller->p_name,
caller->p_reg.pc, offset, phys_addr);
printf("caller stack: ");
proc_stacktrace(caller);
}
return (phys_addr == 0) ? EFAULT: OK;
}
/*===========================================================================*
* do_sdevio *
*===========================================================================*/
PUBLIC int do_sdevio(struct proc * caller, message *m_ptr)
{
vir_bytes newoffset;
endpoint_t newep;
int proc_nr;
endpoint_t proc_nr_e = m_ptr->DIO_VEC_ENDPT;
vir_bytes count = m_ptr->DIO_VEC_SIZE;
long port = m_ptr->DIO_PORT;
phys_bytes phys_buf;
int i, req_type, req_dir, size, nr_io_range;
struct priv *privp;
struct io_range *iorp;
struct proc *destproc;
int retval;
/* Allow safe copies and accesses to SELF */
if ((m_ptr->DIO_REQUEST & _DIO_SAFEMASK) != _DIO_SAFE &&
proc_nr_e != SELF)
{
static int first= 1;
if (first)
{
first= 0;
printf("do_sdevio: for %d, req %d\n",
m_ptr->m_source, m_ptr->DIO_REQUEST);
}
}
/* Check if process endpoint is OK.
* A driver may directly provide a pointer to a buffer at the user-process
* that initiated the device I/O. Kernel processes, of course, are denied.
*/
if (proc_nr_e == SELF)
proc_nr = _ENDPOINT_P(caller->p_endpoint);
else
if(!isokendpt(proc_nr_e, &proc_nr))
return(EINVAL);
if (iskerneln(proc_nr)) return(EPERM);
/* Extract direction (in or out) and type (size). */
req_dir = m_ptr->DIO_REQUEST & _DIO_DIRMASK;
req_type = m_ptr->DIO_REQUEST & _DIO_TYPEMASK;
/* Check for 'safe' variants. */
if((m_ptr->DIO_REQUEST & _DIO_SAFEMASK) == _DIO_SAFE) {
/* Map grant address to physical address. */
if(verify_grant(proc_nr_e, caller->p_endpoint,
(cp_grant_id_t) m_ptr->DIO_VEC_ADDR,
count,
req_dir == _DIO_INPUT ? CPF_WRITE : CPF_READ,
(vir_bytes) m_ptr->DIO_OFFSET,
&newoffset, &newep) != OK) {
printf("do_sdevio: verify_grant failed\n");
return EPERM;
}
if(!isokendpt(newep, &proc_nr))
return(EINVAL);
destproc = proc_addr(proc_nr);
if ((phys_buf = umap_local(destproc, D,
(vir_bytes) newoffset, count)) == 0) {
printf("do_sdevio: umap_local failed\n");
return(EFAULT);
}
} else {
if(proc_nr != _ENDPOINT_P(caller->p_endpoint))
{
printf("do_sdevio: unsafe sdevio by %d in %d denied\n",
caller->p_endpoint, proc_nr_e);
return EPERM;
}
/* Get and check physical address. */
if ((phys_buf = umap_local(proc_addr(proc_nr), D,
(vir_bytes) m_ptr->DIO_VEC_ADDR, count)) == 0)
return(EFAULT);
destproc = proc_addr(proc_nr);
}
/* current process must be target for phys_* to be OK */
switch_address_space(destproc);
switch (req_type)
{
case _DIO_BYTE: size= 1; break;
case _DIO_WORD: size= 2; break;
case _DIO_LONG: size= 4; break;
default: size= 4; break; /* Be conservative */
}
privp= priv(caller);
if (privp && privp->s_flags & CHECK_IO_PORT)
{
port= m_ptr->DIO_PORT;
nr_io_range= privp->s_nr_io_range;
for (i= 0, iorp= privp->s_io_tab; i<nr_io_range; i++, iorp++)
{
if (port >= iorp->ior_base && port+size-1 <= iorp->ior_limit)
break;
}
if (i >= nr_io_range)
{
printf(
"do_sdevio: I/O port check failed for proc %d, port 0x%x\n",
m_ptr->m_source, port);
retval = EPERM;
goto return_error;
}
}
if (port & (size-1))
{
printf("do_devio: unaligned port 0x%x (size %d)\n", port, size);
retval = EPERM;
goto return_error;
}
/* Perform device I/O for bytes and words. Longs are not supported. */
if (req_dir == _DIO_INPUT) {
switch (req_type) {
case _DIO_BYTE: phys_insb(port, phys_buf, count); break;
case _DIO_WORD: phys_insw(port, phys_buf, count); break;
default:
retval = EINVAL;
goto return_error;
}
} else if (req_dir == _DIO_OUTPUT) {
switch (req_type) {
case _DIO_BYTE: phys_outsb(port, phys_buf, count); break;
case _DIO_WORD: phys_outsw(port, phys_buf, count); break;
default:
retval = EINVAL;
goto return_error;
}
}
else {
retval = EINVAL;
goto return_error;
}
retval = OK;
return_error:
/* switch back to the address of the process which made the call */
switch_address_space(caller);
return retval;
}
