void __init init_nlm_common_irqs(void)
{
int i, irq, irt;
for (i = 0; i < PIC_IRT_FIRST_IRQ; i++)
irq_set_chip_and_handler(i, &nlm_cpu_intr, handle_percpu_irq);
for (i = PIC_IRT_FIRST_IRQ; i <= PIC_IRT_LAST_IRQ ; i++)
irq_set_chip_and_handler(i, &xlp_pic, handle_level_irq);
#ifdef CONFIG_SMP
irq_set_chip_and_handler(IRQ_IPI_SMP_FUNCTION, &nlm_cpu_intr,
nlm_smp_function_ipi_handler);
irq_set_chip_and_handler(IRQ_IPI_SMP_RESCHEDULE, &nlm_cpu_intr,
nlm_smp_resched_ipi_handler);
nlm_irq_mask |=
((1ULL << IRQ_IPI_SMP_FUNCTION) | (1ULL << IRQ_IPI_SMP_RESCHEDULE));
#endif
for (irq = PIC_IRT_FIRST_IRQ; irq <= PIC_IRT_LAST_IRQ; irq++) {
irt = nlm_irq_to_irt(irq);
if (irt == -1)
continue;
nlm_irq_mask |= (1ULL << irq);
nlm_pic_init_irt(nlm_pic_base, irt, irq, 0);
}
nlm_irq_mask |= (1ULL << IRQ_TIMER);
}
/*
* Allocate a MSI vector on a link
*/
static int xlp_setup_msi(uint64_t lnkbase, int node, int link,
struct msi_desc *desc)
{
struct xlp_msi_data *md;
struct msi_msg msg;
unsigned long flags;
int msivec, irt, lirq, xirq, ret;
uint64_t msiaddr;
/* Get MSI data for the link */
lirq = PIC_PCIE_LINK_MSI_IRQ(link);
xirq = nlm_irq_to_xirq(node, nlm_link_msiirq(link, 0));
md = irq_get_handler_data(xirq);
msiaddr = MSI_LINK_ADDR(node, link);
spin_lock_irqsave(&md->msi_lock, flags);
if (md->msi_alloc_mask == 0) {
xlp_config_link_msi(lnkbase, lirq, msiaddr);
/* switch the link IRQ to MSI range */
if (cpu_is_xlp9xx())
irt = PIC_9XX_IRT_PCIE_LINK_INDEX(link);
else
irt = PIC_IRT_PCIE_LINK_INDEX(link);
nlm_setup_pic_irq(node, lirq, lirq, irt);
nlm_pic_init_irt(nlm_get_node(node)->picbase, irt, lirq,
node * nlm_threads_per_node(), 1 /*en */);
}
/* allocate a MSI vec, and tell the bridge about it */
msivec = fls(md->msi_alloc_mask);
if (msivec == XLP_MSIVEC_PER_LINK) {
spin_unlock_irqrestore(&md->msi_lock, flags);
return -ENOMEM;
}
md->msi_alloc_mask |= (1u << msivec);
spin_unlock_irqrestore(&md->msi_lock, flags);
msg.address_hi = msiaddr >> 32;
msg.address_lo = msiaddr & 0xffffffff;
msg.data = 0xc00 | msivec;
xirq = xirq + msivec; /* msi mapped to global irq space */
ret = irq_set_msi_desc(xirq, desc);
if (ret < 0)
return ret;
write_msi_msg(xirq, &msg);
return 0;
}
