int physdev_map_pirq(domid_t domid, int type, int *index, int *pirq_p,
struct msi_info *msi)
{
struct domain *d = current->domain;
int pirq, irq, ret = 0;
void *map_data = NULL;
if ( domid == DOMID_SELF && is_hvm_domain(d) )
{
/*
* Only makes sense for vector-based callback, else HVM-IRQ logic
* calls back into itself and deadlocks on hvm_domain.irq_lock.
*/
if ( !is_hvm_pv_evtchn_domain(d) )
return -EINVAL;
return physdev_hvm_map_pirq(d, type, index, pirq_p);
}
d = rcu_lock_domain_by_any_id(domid);
if ( d == NULL )
return -ESRCH;
ret = xsm_map_domain_pirq(XSM_TARGET, d);
if ( ret )
goto free_domain;
/* Verify or get irq. */
switch ( type )
{
case MAP_PIRQ_TYPE_GSI:
if ( *index < 0 || *index >= nr_irqs_gsi )
{
dprintk(XENLOG_G_ERR, "dom%d: map invalid irq %d\n",
d->domain_id, *index);
ret = -EINVAL;
goto free_domain;
}
irq = domain_pirq_to_irq(current->domain, *index);
if ( irq <= 0 )
{
if ( is_hardware_domain(current->domain) )
irq = *index;
else {
dprintk(XENLOG_G_ERR, "dom%d: map pirq with incorrect irq!\n",
d->domain_id);
ret = -EINVAL;
goto free_domain;
}
}
break;
case MAP_PIRQ_TYPE_MSI:
if ( !msi->table_base )
msi->entry_nr = 1;
irq = *index;
if ( irq == -1 )
case MAP_PIRQ_TYPE_MULTI_MSI:
irq = create_irq(NUMA_NO_NODE);
if ( irq < nr_irqs_gsi || irq >= nr_irqs )
{
dprintk(XENLOG_G_ERR, "dom%d: can't create irq for msi!\n",
d->domain_id);
ret = -EINVAL;
goto free_domain;
}
msi->irq = irq;
map_data = msi;
break;
default:
dprintk(XENLOG_G_ERR, "dom%d: wrong map_pirq type %x\n",
d->domain_id, type);
ret = -EINVAL;
goto free_domain;
}
spin_lock(&pcidevs_lock);
/* Verify or get pirq. */
spin_lock(&d->event_lock);
pirq = domain_irq_to_pirq(d, irq);
if ( *pirq_p < 0 )
{
if ( pirq )
{
dprintk(XENLOG_G_ERR, "dom%d: %d:%d already mapped to %d\n",
d->domain_id, *index, *pirq_p, pirq);
if ( pirq < 0 )
{
ret = -EBUSY;
goto done;
}
}
else if ( type == MAP_PIRQ_TYPE_MULTI_MSI )
{
if ( msi->entry_nr <= 0 || msi->entry_nr > 32 )
ret = -EDOM;
else if ( msi->entry_nr != 1 && !iommu_intremap )
ret = -EOPNOTSUPP;
else
{
while ( msi->entry_nr & (msi->entry_nr - 1) )
msi->entry_nr += msi->entry_nr & -msi->entry_nr;
pirq = get_free_pirqs(d, msi->entry_nr);
if ( pirq < 0 )
{
while ( (msi->entry_nr >>= 1) > 1 )
if ( get_free_pirqs(d, msi->entry_nr) > 0 )
break;
dprintk(XENLOG_G_ERR, "dom%d: no block of %d free pirqs\n",
d->domain_id, msi->entry_nr << 1);
ret = pirq;
}
}
if ( ret < 0 )
goto done;
}
else
{
pirq = get_free_pirq(d, type);
if ( pirq < 0 )
{
dprintk(XENLOG_G_ERR, "dom%d: no free pirq\n", d->domain_id);
ret = pirq;
goto done;
}
}
}
int physdev_map_pirq(domid_t domid, int type, int *index, int *pirq_p,
struct msi_info *msi)
{
struct domain *d = current->domain;
int pirq, irq, ret = 0;
void *map_data = NULL;
if ( domid == DOMID_SELF && is_hvm_domain(d) )
{
/*
* Only makes sense for vector-based callback, else HVM-IRQ logic
* calls back into itself and deadlocks on hvm_domain.irq_lock.
*/
if ( !is_hvm_pv_evtchn_domain(d) )
return -EINVAL;
return physdev_hvm_map_pirq(d, type, index, pirq_p);
}
d = rcu_lock_domain_by_any_id(domid);
if ( d == NULL )
return -ESRCH;
ret = xsm_map_domain_pirq(XSM_TARGET, d);
if ( ret )
goto free_domain;
/* Verify or get irq. */
switch ( type )
{
case MAP_PIRQ_TYPE_GSI:
if ( *index < 0 || *index >= nr_irqs_gsi )
{
dprintk(XENLOG_G_ERR, "dom%d: map invalid irq %d\n",
d->domain_id, *index);
ret = -EINVAL;
goto free_domain;
}
irq = domain_pirq_to_irq(current->domain, *index);
if ( irq <= 0 )
{
if ( is_hardware_domain(current->domain) )
irq = *index;
else {
dprintk(XENLOG_G_ERR, "dom%d: map pirq with incorrect irq!\n",
d->domain_id);
ret = -EINVAL;
goto free_domain;
}
}
break;
case MAP_PIRQ_TYPE_MSI:
irq = *index;
if ( irq == -1 )
irq = create_irq(NUMA_NO_NODE);
if ( irq < nr_irqs_gsi || irq >= nr_irqs )
{
dprintk(XENLOG_G_ERR, "dom%d: can't create irq for msi!\n",
d->domain_id);
ret = -EINVAL;
goto free_domain;
}
msi->irq = irq;
map_data = msi;
break;
default:
dprintk(XENLOG_G_ERR, "dom%d: wrong map_pirq type %x\n",
d->domain_id, type);
ret = -EINVAL;
goto free_domain;
}
spin_lock(&pcidevs_lock);
/* Verify or get pirq. */
spin_lock(&d->event_lock);
pirq = domain_irq_to_pirq(d, irq);
if ( *pirq_p < 0 )
{
if ( pirq )
{
dprintk(XENLOG_G_ERR, "dom%d: %d:%d already mapped to %d\n",
d->domain_id, *index, *pirq_p, pirq);
if ( pirq < 0 )
{
ret = -EBUSY;
goto done;
}
}
else
{
pirq = get_free_pirq(d, type);
if ( pirq < 0 )
{
dprintk(XENLOG_G_ERR, "dom%d: no free pirq\n", d->domain_id);
ret = pirq;
goto done;
}
}
}
else
{
if ( pirq && pirq != *pirq_p )
{
dprintk(XENLOG_G_ERR, "dom%d: pirq %d conflicts with irq %d\n",
d->domain_id, *index, *pirq_p);
ret = -EEXIST;
goto done;
}
else
pirq = *pirq_p;
}
ret = map_domain_pirq(d, pirq, irq, type, map_data);
if ( ret == 0 )
*pirq_p = pirq;
done:
spin_unlock(&d->event_lock);
spin_unlock(&pcidevs_lock);
if ( (ret != 0) && (type == MAP_PIRQ_TYPE_MSI) && (*index == -1) )
destroy_irq(irq);
free_domain:
rcu_unlock_domain(d);
return ret;
}