From 8409668b561fbe464f7a392e8dc77eca225d27ac Mon Sep 17 00:00:00 2001 From: Mark Maule Date: Thu, 25 Aug 2005 11:45:00 -0700 Subject: [IA64] altix: Abstract irq_affinity at the sn pci provider Altix patch to abstract irq_affinity down to the pci provider level since different SGI hardware implements this in different ways. Signed-off-by: Mark Maule Signed-off-by: Tony Luck --- arch/ia64/sn/pci/tioce_provider.c | 40 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 39 insertions(+), 1 deletion(-) (limited to 'arch/ia64/sn/pci/tioce_provider.c') diff --git a/arch/ia64/sn/pci/tioce_provider.c b/arch/ia64/sn/pci/tioce_provider.c index d9081369cf96..8e75db2b825d 100644 --- a/arch/ia64/sn/pci/tioce_provider.c +++ b/arch/ia64/sn/pci/tioce_provider.c @@ -668,6 +668,43 @@ tioce_force_interrupt(struct sn_irq_info *sn_irq_info) ce_mmr->ce_adm_force_int = force_int_val; } +/** + * tioce_target_interrupt - implement set_irq_affinity for tioce resident + * functions. Note: only applies to line interrupts, not MSI's. + * + * @sn_irq_info: SN IRQ context + * + * Given an sn_irq_info, set the associated CE device's interrupt destination + * register. Since the interrupt destination registers are on a per-ce-slot + * basis, this will retarget line interrupts for all functions downstream of + * the slot. + */ +static void +tioce_target_interrupt(struct sn_irq_info *sn_irq_info) +{ + struct pcidev_info *pcidev_info; + struct tioce_common *ce_common; + struct tioce *ce_mmr; + int bit; + + pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; + if (!pcidev_info) + return; + + ce_common = (struct tioce_common *)pcidev_info->pdi_pcibus_info; + ce_mmr = (struct tioce *)ce_common->ce_pcibus.bs_base; + + bit = sn_irq_info->irq_int_bit; + + ce_mmr->ce_adm_int_mask |= (1UL << bit); + ce_mmr->ce_adm_int_dest[bit] = + ((uint64_t)sn_irq_info->irq_irq << INTR_VECTOR_SHFT) | + sn_irq_info->irq_xtalkaddr; + ce_mmr->ce_adm_int_mask &= ~(1UL << bit); + + tioce_force_interrupt(sn_irq_info); +} + /** * tioce_bus_fixup - perform final PCI fixup for a TIO CE bus * @prom_bussoft: Common prom/kernel struct representing the bus @@ -719,7 +756,8 @@ static struct sn_pcibus_provider tioce_pci_interfaces = { .dma_map_consistent = tioce_dma_consistent, .dma_unmap = tioce_dma_unmap, .bus_fixup = tioce_bus_fixup, - .force_interrupt = tioce_force_interrupt + .force_interrupt = tioce_force_interrupt, + .target_interrupt = tioce_target_interrupt }; /** -- cgit v1.2.3