[IA64] altix: Abstract irq_affinity at the sn pci provider

[sfrench/cifs-2.6.git] / 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 d9081369cf96ac3aa5ef57d1701ddf07d0843708..8e75db2b825d7f3380e645f4408ec06d2f324951 100644 (file)
--- 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
 };
 
 /**