* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2000-2006 Silicon Graphics, Inc. All Rights Reserved.
*/
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/vmalloc.h>
#include <linux/irq.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-#include <linux/bootmem.h>
-#include <linux/cpumask.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/sn/sgi.h>
-#include <asm/sn/hcl.h>
-#include <asm/sn/types.h>
-#include <asm/sn/pci/pciio.h>
-#include <asm/sn/pci/pciio_private.h>
-#include <asm/sn/pci/pcibr.h>
-#include <asm/sn/pci/pcibr_private.h>
-#include <asm/sn/sn_cpuid.h>
-#include <asm/sn/io.h>
-#include <asm/sn/intr.h>
+#include <linux/spinlock.h>
+#include <linux/init.h>
#include <asm/sn/addrs.h>
-#include <asm/sn/driver.h>
#include <asm/sn/arch.h>
-#include <asm/sn/pda.h>
-#include <asm/processor.h>
-#include <asm/system.h>
-#include <asm/bitops.h>
-#include <asm/sn/sn2/shub_mmr.h>
+#include <asm/sn/intr.h>
+#include <asm/sn/pcibr_provider.h>
+#include <asm/sn/pcibus_provider_defs.h>
+#include <asm/sn/pcidev.h>
+#include <asm/sn/shub_mmr.h>
+#include <asm/sn/sn_sal.h>
static void force_interrupt(int irq);
-extern void pcibr_force_interrupt(pcibr_intr_t intr);
-extern int sn_force_interrupt_flag;
-struct irq_desc * sn_irq_desc(unsigned int irq);
+static void register_intr_pda(struct sn_irq_info *sn_irq_info);
+static void unregister_intr_pda(struct sn_irq_info *sn_irq_info);
+
+int sn_force_interrupt_flag = 1;
+extern int sn_ioif_inited;
+struct list_head **sn_irq_lh;
+static DEFINE_SPINLOCK(sn_irq_info_lock); /* non-IRQ lock */
+
+u64 sn_intr_alloc(nasid_t local_nasid, int local_widget,
+ struct sn_irq_info *sn_irq_info,
+ int req_irq, nasid_t req_nasid,
+ int req_slice)
+{
+ struct ia64_sal_retval ret_stuff;
+ ret_stuff.status = 0;
+ ret_stuff.v0 = 0;
-struct sn_intr_list_t {
- struct sn_intr_list_t *next;
- pcibr_intr_t intr;
-};
+ SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_INTERRUPT,
+ (u64) SAL_INTR_ALLOC, (u64) local_nasid,
+ (u64) local_widget, __pa(sn_irq_info), (u64) req_irq,
+ (u64) req_nasid, (u64) req_slice);
-static struct sn_intr_list_t *sn_intr_list[NR_IRQS];
+ return ret_stuff.status;
+}
+void sn_intr_free(nasid_t local_nasid, int local_widget,
+ struct sn_irq_info *sn_irq_info)
+{
+ struct ia64_sal_retval ret_stuff;
+ ret_stuff.status = 0;
+ ret_stuff.v0 = 0;
+
+ SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_INTERRUPT,
+ (u64) SAL_INTR_FREE, (u64) local_nasid,
+ (u64) local_widget, (u64) sn_irq_info->irq_irq,
+ (u64) sn_irq_info->irq_cookie, 0, 0);
+}
-static unsigned int
-sn_startup_irq(unsigned int irq)
+static unsigned int sn_startup_irq(unsigned int irq)
{
- return(0);
+ return 0;
}
-static void
-sn_shutdown_irq(unsigned int irq)
+static void sn_shutdown_irq(unsigned int irq)
{
}
-static void
-sn_disable_irq(unsigned int irq)
+static void sn_disable_irq(unsigned int irq)
{
}
-static void
-sn_enable_irq(unsigned int irq)
+static void sn_enable_irq(unsigned int irq)
{
}
-static void
-sn_ack_irq(unsigned int irq)
+static void sn_ack_irq(unsigned int irq)
{
- unsigned long event_occurred, mask = 0;
- int nasid;
+ u64 event_occurred, mask;
irq = irq & 0xff;
- nasid = smp_physical_node_id();
- event_occurred = HUB_L( (unsigned long *)GLOBAL_MMR_ADDR(nasid,SH_EVENT_OCCURRED) );
- if (event_occurred & SH_EVENT_OCCURRED_UART_INT_MASK) {
- mask |= (1 << SH_EVENT_OCCURRED_UART_INT_SHFT);
- }
- if (event_occurred & SH_EVENT_OCCURRED_IPI_INT_MASK) {
- mask |= (1 << SH_EVENT_OCCURRED_IPI_INT_SHFT);
- }
- if (event_occurred & SH_EVENT_OCCURRED_II_INT0_MASK) {
- mask |= (1 << SH_EVENT_OCCURRED_II_INT0_SHFT);
- }
- if (event_occurred & SH_EVENT_OCCURRED_II_INT1_MASK) {
- mask |= (1 << SH_EVENT_OCCURRED_II_INT1_SHFT);
- }
- HUB_S((unsigned long *)GLOBAL_MMR_ADDR(nasid, SH_EVENT_OCCURRED_ALIAS), mask );
+ event_occurred = HUB_L((u64*)LOCAL_MMR_ADDR(SH_EVENT_OCCURRED));
+ mask = event_occurred & SH_ALL_INT_MASK;
+ HUB_S((u64*)LOCAL_MMR_ADDR(SH_EVENT_OCCURRED_ALIAS), mask);
__set_bit(irq, (volatile void *)pda->sn_in_service_ivecs);
+
+ move_native_irq(irq);
}
-static void
-sn_end_irq(unsigned int irq)
+static void sn_end_irq(unsigned int irq)
{
- int nasid;
int ivec;
- unsigned long event_occurred;
- irq_desc_t *desc = sn_irq_desc(irq);
- unsigned int status = desc->status;
+ u64 event_occurred;
ivec = irq & 0xff;
if (ivec == SGI_UART_VECTOR) {
- nasid = smp_physical_node_id();
- event_occurred = HUB_L( (unsigned long *)GLOBAL_MMR_ADDR(nasid,SH_EVENT_OCCURRED) );
- // If the UART bit is set here, we may have received an interrupt from the
- // UART that the driver missed. To make sure, we IPI ourselves to force us
- // to look again.
+ event_occurred = HUB_L((u64*)LOCAL_MMR_ADDR (SH_EVENT_OCCURRED));
+ /* If the UART bit is set here, we may have received an
+ * interrupt from the UART that the driver missed. To
+ * make sure, we IPI ourselves to force us to look again.
+ */
if (event_occurred & SH_EVENT_OCCURRED_UART_INT_MASK) {
- platform_send_ipi(smp_processor_id(), SGI_UART_VECTOR, IA64_IPI_DM_INT, 0);
+ platform_send_ipi(smp_processor_id(), SGI_UART_VECTOR,
+ IA64_IPI_DM_INT, 0);
}
}
__clear_bit(ivec, (volatile void *)pda->sn_in_service_ivecs);
if (sn_force_interrupt_flag)
- if (!(status & (IRQ_DISABLED | IRQ_INPROGRESS)))
- force_interrupt(irq);
+ force_interrupt(irq);
}
-static void
-sn_set_affinity_irq(unsigned int irq, cpumask_t mask)
+static void sn_irq_info_free(struct rcu_head *head);
+
+struct sn_irq_info *sn_retarget_vector(struct sn_irq_info *sn_irq_info,
+ nasid_t nasid, int slice)
{
+ int vector;
+ int cpuid;
#ifdef CONFIG_SMP
- int redir = 0;
- int cpu;
- struct sn_intr_list_t *p = sn_intr_list[irq];
- pcibr_intr_t intr;
- extern void sn_shub_redirect_intr(pcibr_intr_t intr, unsigned long cpu);
- extern void sn_tio_redirect_intr(pcibr_intr_t intr, unsigned long cpu);
-
- if (p == NULL)
- return;
-
- intr = p->intr;
-
- if (intr == NULL)
- return;
-
- cpu = first_cpu(mask);
- sn_shub_redirect_intr(intr, cpu);
- irq = irq & 0xff; /* strip off redirect bit, if someone stuck it on. */
- (void) set_irq_affinity_info(irq, cpu_physical_id(intr->bi_cpu), redir);
-#endif /* CONFIG_SMP */
-}
+ int cpuphys;
+#endif
+ int64_t bridge;
+ int local_widget, status;
+ nasid_t local_nasid;
+ struct sn_irq_info *new_irq_info;
+ struct sn_pcibus_provider *pci_provider;
+
+ new_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_ATOMIC);
+ if (new_irq_info == NULL)
+ return NULL;
+
+ memcpy(new_irq_info, sn_irq_info, sizeof(struct sn_irq_info));
+
+ bridge = (u64) new_irq_info->irq_bridge;
+ if (!bridge) {
+ kfree(new_irq_info);
+ return NULL; /* irq is not a device interrupt */
+ }
+ local_nasid = NASID_GET(bridge);
-struct hw_interrupt_type irq_type_sn = {
- "SN hub",
- sn_startup_irq,
- sn_shutdown_irq,
- sn_enable_irq,
- sn_disable_irq,
- sn_ack_irq,
- sn_end_irq,
- sn_set_affinity_irq
-};
+ if (local_nasid & 1)
+ local_widget = TIO_SWIN_WIDGETNUM(bridge);
+ else
+ local_widget = SWIN_WIDGETNUM(bridge);
+ vector = sn_irq_info->irq_irq;
+ /* Free the old PROM new_irq_info structure */
+ sn_intr_free(local_nasid, local_widget, new_irq_info);
+ unregister_intr_pda(new_irq_info);
+
+ /* allocate a new PROM new_irq_info struct */
+ status = sn_intr_alloc(local_nasid, local_widget,
+ new_irq_info, vector,
+ nasid, slice);
+
+ /* SAL call failed */
+ if (status) {
+ kfree(new_irq_info);
+ return NULL;
+ }
-struct irq_desc *
-sn_irq_desc(unsigned int irq)
+ /* Update kernels new_irq_info with new target info */
+ cpuid = nasid_slice_to_cpuid(new_irq_info->irq_nasid,
+ new_irq_info->irq_slice);
+ new_irq_info->irq_cpuid = cpuid;
+ register_intr_pda(new_irq_info);
+
+ pci_provider = sn_pci_provider[new_irq_info->irq_bridge_type];
+
+ /*
+ * If this represents a line interrupt, target it. If it's
+ * an msi (irq_int_bit < 0), it's already targeted.
+ */
+ if (new_irq_info->irq_int_bit >= 0 &&
+ pci_provider && pci_provider->target_interrupt)
+ (pci_provider->target_interrupt)(new_irq_info);
+
+ spin_lock(&sn_irq_info_lock);
+ list_replace_rcu(&sn_irq_info->list, &new_irq_info->list);
+ spin_unlock(&sn_irq_info_lock);
+ call_rcu(&sn_irq_info->rcu, sn_irq_info_free);
+
+#ifdef CONFIG_SMP
+ cpuphys = cpu_physical_id(cpuid);
+ set_irq_affinity_info((vector & 0xff), cpuphys, 0);
+#endif
+
+ return new_irq_info;
+}
+
+static void sn_set_affinity_irq(unsigned int irq, cpumask_t mask)
{
+ struct sn_irq_info *sn_irq_info, *sn_irq_info_safe;
+ nasid_t nasid;
+ int slice;
+
+ nasid = cpuid_to_nasid(first_cpu(mask));
+ slice = cpuid_to_slice(first_cpu(mask));
- irq = SN_IVEC_FROM_IRQ(irq);
+ list_for_each_entry_safe(sn_irq_info, sn_irq_info_safe,
+ sn_irq_lh[irq], list)
+ (void)sn_retarget_vector(sn_irq_info, nasid, slice);
+}
- return(_irq_desc + irq);
+static void
+sn_mask_irq(unsigned int irq)
+{
}
-u8
-sn_irq_to_vector(u8 irq)
+static void
+sn_unmask_irq(unsigned int irq)
{
- return(irq);
}
-unsigned int
-sn_local_vector_to_irq(u8 vector)
+struct irq_chip irq_type_sn = {
+ .name = "SN hub",
+ .startup = sn_startup_irq,
+ .shutdown = sn_shutdown_irq,
+ .enable = sn_enable_irq,
+ .disable = sn_disable_irq,
+ .ack = sn_ack_irq,
+ .end = sn_end_irq,
+ .mask = sn_mask_irq,
+ .unmask = sn_unmask_irq,
+ .set_affinity = sn_set_affinity_irq
+};
+
+unsigned int sn_local_vector_to_irq(u8 vector)
{
return (CPU_VECTOR_TO_IRQ(smp_processor_id(), vector));
}
-void
-sn_irq_init (void)
+void sn_irq_init(void)
{
int i;
- irq_desc_t *base_desc = _irq_desc;
+ irq_desc_t *base_desc = irq_desc;
- for (i=0; i<NR_IRQS; i++) {
- if (base_desc[i].handler == &no_irq_type) {
- base_desc[i].handler = &irq_type_sn;
+ ia64_first_device_vector = IA64_SN2_FIRST_DEVICE_VECTOR;
+ ia64_last_device_vector = IA64_SN2_LAST_DEVICE_VECTOR;
+
+ for (i = 0; i < NR_IRQS; i++) {
+ if (base_desc[i].chip == &no_irq_type) {
+ base_desc[i].chip = &irq_type_sn;
}
}
}
-void
-register_pcibr_intr(int irq, pcibr_intr_t intr)
+static void register_intr_pda(struct sn_irq_info *sn_irq_info)
{
- struct sn_intr_list_t *p = kmalloc(sizeof(struct sn_intr_list_t), GFP_KERNEL);
- struct sn_intr_list_t *list;
- int cpu = intr->bi_cpu;
+ int irq = sn_irq_info->irq_irq;
+ int cpu = sn_irq_info->irq_cpuid;
if (pdacpu(cpu)->sn_last_irq < irq) {
pdacpu(cpu)->sn_last_irq = irq;
}
- if (pdacpu(cpu)->sn_first_irq == 0 || pdacpu(cpu)->sn_first_irq > irq) pdacpu(cpu)->sn_first_irq = irq;
- if (!p) panic("Could not allocate memory for sn_intr_list_t\n");
- if ((list = sn_intr_list[irq])) {
- while (list->next) list = list->next;
- list->next = p;
- p->next = NULL;
- p->intr = intr;
- } else {
- sn_intr_list[irq] = p;
- p->next = NULL;
- p->intr = intr;
+
+ if (pdacpu(cpu)->sn_first_irq == 0 || pdacpu(cpu)->sn_first_irq > irq)
+ pdacpu(cpu)->sn_first_irq = irq;
+}
+
+static void unregister_intr_pda(struct sn_irq_info *sn_irq_info)
+{
+ int irq = sn_irq_info->irq_irq;
+ int cpu = sn_irq_info->irq_cpuid;
+ struct sn_irq_info *tmp_irq_info;
+ int i, foundmatch;
+
+ rcu_read_lock();
+ if (pdacpu(cpu)->sn_last_irq == irq) {
+ foundmatch = 0;
+ for (i = pdacpu(cpu)->sn_last_irq - 1;
+ i && !foundmatch; i--) {
+ list_for_each_entry_rcu(tmp_irq_info,
+ sn_irq_lh[i],
+ list) {
+ if (tmp_irq_info->irq_cpuid == cpu) {
+ foundmatch = 1;
+ break;
+ }
+ }
+ }
+ pdacpu(cpu)->sn_last_irq = i;
+ }
+
+ if (pdacpu(cpu)->sn_first_irq == irq) {
+ foundmatch = 0;
+ for (i = pdacpu(cpu)->sn_first_irq + 1;
+ i < NR_IRQS && !foundmatch; i++) {
+ list_for_each_entry_rcu(tmp_irq_info,
+ sn_irq_lh[i],
+ list) {
+ if (tmp_irq_info->irq_cpuid == cpu) {
+ foundmatch = 1;
+ break;
+ }
+ }
+ }
+ pdacpu(cpu)->sn_first_irq = ((i == NR_IRQS) ? 0 : i);
}
+ rcu_read_unlock();
}
-void
-unregister_pcibr_intr(int irq, pcibr_intr_t intr)
+static void sn_irq_info_free(struct rcu_head *head)
{
+ struct sn_irq_info *sn_irq_info;
- struct sn_intr_list_t **prev, *curr;
- int cpu = intr->bi_cpu;
- int i;
+ sn_irq_info = container_of(head, struct sn_irq_info, rcu);
+ kfree(sn_irq_info);
+}
+
+void sn_irq_fixup(struct pci_dev *pci_dev, struct sn_irq_info *sn_irq_info)
+{
+ nasid_t nasid = sn_irq_info->irq_nasid;
+ int slice = sn_irq_info->irq_slice;
+ int cpu = nasid_slice_to_cpuid(nasid, slice);
+#ifdef CONFIG_SMP
+ int cpuphys;
+#endif
+
+ pci_dev_get(pci_dev);
+ sn_irq_info->irq_cpuid = cpu;
+ sn_irq_info->irq_pciioinfo = SN_PCIDEV_INFO(pci_dev);
+
+ /* link it into the sn_irq[irq] list */
+ spin_lock(&sn_irq_info_lock);
+ list_add_rcu(&sn_irq_info->list, sn_irq_lh[sn_irq_info->irq_irq]);
+ reserve_irq_vector(sn_irq_info->irq_irq);
+ spin_unlock(&sn_irq_info_lock);
+
+ register_intr_pda(sn_irq_info);
+#ifdef CONFIG_SMP
+ cpuphys = cpu_physical_id(cpu);
+ set_irq_affinity_info(sn_irq_info->irq_irq, cpuphys, 0);
+#endif
+}
- if (sn_intr_list[irq] == NULL)
+void sn_irq_unfixup(struct pci_dev *pci_dev)
+{
+ struct sn_irq_info *sn_irq_info;
+
+ /* Only cleanup IRQ stuff if this device has a host bus context */
+ if (!SN_PCIDEV_BUSSOFT(pci_dev))
return;
- prev = &sn_intr_list[irq];
- curr = sn_intr_list[irq];
- while (curr) {
- if (curr->intr == intr) {
- *prev = curr->next;
- break;
- }
- prev = &curr->next;
- curr = curr->next;
+ sn_irq_info = SN_PCIDEV_INFO(pci_dev)->pdi_sn_irq_info;
+ if (!sn_irq_info)
+ return;
+ if (!sn_irq_info->irq_irq) {
+ kfree(sn_irq_info);
+ return;
}
- if (curr)
- kfree(curr);
+ unregister_intr_pda(sn_irq_info);
+ spin_lock(&sn_irq_info_lock);
+ list_del_rcu(&sn_irq_info->list);
+ spin_unlock(&sn_irq_info_lock);
+ if (list_empty(sn_irq_lh[sn_irq_info->irq_irq]))
+ free_irq_vector(sn_irq_info->irq_irq);
+ call_rcu(&sn_irq_info->rcu, sn_irq_info_free);
+ pci_dev_put(pci_dev);
- if (!sn_intr_list[irq]) {
- if (pdacpu(cpu)->sn_last_irq == irq) {
- for (i = pdacpu(cpu)->sn_last_irq - 1; i; i--)
- if (sn_intr_list[i])
- break;
- pdacpu(cpu)->sn_last_irq = i;
- }
+}
- if (pdacpu(cpu)->sn_first_irq == irq) {
- pdacpu(cpu)->sn_first_irq = 0;
- for (i = pdacpu(cpu)->sn_first_irq + 1; i < NR_IRQS; i++)
- if (sn_intr_list[i])
- pdacpu(cpu)->sn_first_irq = i;
- }
- }
+static inline void
+sn_call_force_intr_provider(struct sn_irq_info *sn_irq_info)
+{
+ struct sn_pcibus_provider *pci_provider;
+ pci_provider = sn_pci_provider[sn_irq_info->irq_bridge_type];
+ if (pci_provider && pci_provider->force_interrupt)
+ (*pci_provider->force_interrupt)(sn_irq_info);
}
-void
-force_polled_int(void)
+static void force_interrupt(int irq)
{
- int i;
- struct sn_intr_list_t *p;
+ struct sn_irq_info *sn_irq_info;
- for (i=0; i<NR_IRQS;i++) {
- p = sn_intr_list[i];
- while (p) {
- if (p->intr){
- pcibr_force_interrupt(p->intr);
- }
- p = p->next;
- }
- }
+ if (!sn_ioif_inited)
+ return;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(sn_irq_info, sn_irq_lh[irq], list)
+ sn_call_force_intr_provider(sn_irq_info);
+
+ rcu_read_unlock();
}
-static void
-force_interrupt(int irq)
+/*
+ * Check for lost interrupts. If the PIC int_status reg. says that
+ * an interrupt has been sent, but not handled, and the interrupt
+ * is not pending in either the cpu irr regs or in the soft irr regs,
+ * and the interrupt is not in service, then the interrupt may have
+ * been lost. Force an interrupt on that pin. It is possible that
+ * the interrupt is in flight, so we may generate a spurious interrupt,
+ * but we should never miss a real lost interrupt.
+ */
+static void sn_check_intr(int irq, struct sn_irq_info *sn_irq_info)
{
- struct sn_intr_list_t *p = sn_intr_list[irq];
+ u64 regval;
+ struct pcidev_info *pcidev_info;
+ struct pcibus_info *pcibus_info;
+
+ /*
+ * Bridge types attached to TIO (anything but PIC) do not need this WAR
+ * since they do not target Shub II interrupt registers. If that
+ * ever changes, this check needs to accomodate.
+ */
+ if (sn_irq_info->irq_bridge_type != PCIIO_ASIC_TYPE_PIC)
+ return;
+
+ pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
+ if (!pcidev_info)
+ return;
- while (p) {
- if (p->intr) {
- pcibr_force_interrupt(p->intr);
+ pcibus_info =
+ (struct pcibus_info *)pcidev_info->pdi_host_pcidev_info->
+ pdi_pcibus_info;
+ regval = pcireg_intr_status_get(pcibus_info);
+
+ if (!ia64_get_irr(irq_to_vector(irq))) {
+ if (!test_bit(irq, pda->sn_in_service_ivecs)) {
+ regval &= 0xff;
+ if (sn_irq_info->irq_int_bit & regval &
+ sn_irq_info->irq_last_intr) {
+ regval &= ~(sn_irq_info->irq_int_bit & regval);
+ sn_call_force_intr_provider(sn_irq_info);
+ }
}
- p = p->next;
}
+ sn_irq_info->irq_last_intr = regval;
}
-/*
-Check for lost interrupts. If the PIC int_status reg. says that
-an interrupt has been sent, but not handled, and the interrupt
-is not pending in either the cpu irr regs or in the soft irr regs,
-and the interrupt is not in service, then the interrupt may have
-been lost. Force an interrupt on that pin. It is possible that
-the interrupt is in flight, so we may generate a spurious interrupt,
-but we should never miss a real lost interrupt.
-*/
-
-static void
-sn_check_intr(int irq, pcibr_intr_t intr)
+void sn_lb_int_war_check(void)
{
- unsigned long regval;
- int irr_reg_num;
- int irr_bit;
- unsigned long irr_reg;
-
-
- regval = pcireg_intr_status_get(intr->bi_soft);
- irr_reg_num = irq_to_vector(irq) / 64;
- irr_bit = irq_to_vector(irq) % 64;
- switch (irr_reg_num) {
- case 0:
- irr_reg = ia64_getreg(_IA64_REG_CR_IRR0);
- break;
- case 1:
- irr_reg = ia64_getreg(_IA64_REG_CR_IRR1);
- break;
- case 2:
- irr_reg = ia64_getreg(_IA64_REG_CR_IRR2);
- break;
- case 3:
- irr_reg = ia64_getreg(_IA64_REG_CR_IRR3);
- break;
- }
- if (!test_bit(irr_bit, &irr_reg) ) {
- if (!test_bit(irq, pda->sn_soft_irr) ) {
- if (!test_bit(irq, pda->sn_in_service_ivecs) ) {
- regval &= 0xff;
- if (intr->bi_ibits & regval & intr->bi_last_intr) {
- regval &= ~(intr->bi_ibits & regval);
- pcibr_force_interrupt(intr);
- }
- }
+ struct sn_irq_info *sn_irq_info;
+ int i;
+
+ if (!sn_ioif_inited || pda->sn_first_irq == 0)
+ return;
+
+ rcu_read_lock();
+ for (i = pda->sn_first_irq; i <= pda->sn_last_irq; i++) {
+ list_for_each_entry_rcu(sn_irq_info, sn_irq_lh[i], list) {
+ sn_check_intr(i, sn_irq_info);
}
}
- intr->bi_last_intr = regval;
+ rcu_read_unlock();
}
-void
-sn_lb_int_war_check(void)
+void __init sn_irq_lh_init(void)
{
int i;
- if (pda->sn_first_irq == 0) return;
- for (i=pda->sn_first_irq;
- i <= pda->sn_last_irq; i++) {
- struct sn_intr_list_t *p = sn_intr_list[i];
- if (p == NULL) {
- continue;
- }
- while (p) {
- sn_check_intr(i, p->intr);
- p = p->next;
- }
+ sn_irq_lh = kmalloc(sizeof(struct list_head *) * NR_IRQS, GFP_KERNEL);
+ if (!sn_irq_lh)
+ panic("SN PCI INIT: Failed to allocate memory for PCI init\n");
+
+ for (i = 0; i < NR_IRQS; i++) {
+ sn_irq_lh[i] = kmalloc(sizeof(struct list_head), GFP_KERNEL);
+ if (!sn_irq_lh[i])
+ panic("SN PCI INIT: Failed IRQ memory allocation\n");
+
+ INIT_LIST_HEAD(sn_irq_lh[i]);
}
}
git://git.onelab.eu / linux-2.6.git / blobdiff