int xics_alloc(XICSState *icp, int src, int irq_hint, bool lsi, Error **errp)
{
ICSState *ics = &icp->ics[src];
int irq;
if (irq_hint) {
assert(src == xics_find_source(icp, irq_hint));
if (!ICS_IRQ_FREE(ics, irq_hint - ics->offset)) {
error_setg(errp, "can't allocate IRQ %d: already in use", irq_hint);
return -1;
}
irq = irq_hint;
} else {
irq = ics_find_free_block(ics, 1, 1);
if (irq < 0) {
error_setg(errp, "can't allocate IRQ: no IRQ left");
return -1;
}
irq += ics->offset;
}
ics_set_irq_type(ics, irq - ics->offset, lsi);
trace_xics_alloc(src, irq);
return irq;
}
int xics_alloc(XICSState *icp, int src, int irq_hint, bool lsi)
{
ICSState *ics = &icp->ics[src];
int irq;
if (irq_hint) {
assert(src == xics_find_source(icp, irq_hint));
if (!ICS_IRQ_FREE(ics, irq_hint - ics->offset)) {
trace_xics_alloc_failed_hint(src, irq_hint);
return -1;
}
irq = irq_hint;
} else {
irq = ics_find_free_block(ics, 1, 1);
if (irq < 0) {
trace_xics_alloc_failed_no_left(src);
return -1;
}
irq += ics->offset;
}
ics_set_irq_type(ics, irq - ics->offset, lsi);
trace_xics_alloc(src, irq);
return irq;
}
/*
* Allocate block of consequtive IRQs, returns a number of the first.
* If align==true, aligns the first IRQ number to num.
*/
int xics_alloc_block(XICSState *icp, int src, int num, bool lsi, bool align)
{
int i, first = -1;
ICSState *ics = &icp->ics[src];
assert(src == 0);
/*
* MSIMesage::data is used for storing VIRQ so
* it has to be aligned to num to support multiple
* MSI vectors. MSI-X is not affected by this.
* The hint is used for the first IRQ, the rest should
* be allocated continuously.
*/
if (align) {
assert((num == 1) || (num == 2) || (num == 4) ||
(num == 8) || (num == 16) || (num == 32));
first = ics_find_free_block(ics, num, num);
} else {
first = ics_find_free_block(ics, num, 1);
}
if (first >= 0) {
for (i = first; i < first + num; ++i) {
ics_set_irq_type(ics, i, lsi);
}
}
first += ics->offset;
trace_xics_alloc_block(src, first, num, lsi, align);
return first;
}
void xics_set_irq_type(XICSState *icp, int irq, bool lsi)
{
int src = xics_find_source(icp, irq);
ICSState *ics;
assert(src >= 0);
ics = &icp->ics[src];
ics_set_irq_type(ics, irq - ics->offset, lsi);
}
static int spapr_irq_claim_xics(sPAPRMachineState *spapr, int irq, bool lsi,
Error **errp)
{
ICSState *ics = spapr->ics;
assert(ics);
if (!ics_valid_irq(ics, irq)) {
error_setg(errp, "IRQ %d is invalid", irq);
return -1;
}
if (!ICS_IRQ_FREE(ics, irq - ics->offset)) {
error_setg(errp, "IRQ %d is not free", irq);
return -1;
}
ics_set_irq_type(ics, irq - ics->offset, lsi);
return 0;
}
