* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2000-2005 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2000-2006 Silicon Graphics, Inc. All Rights Reserved.
*/
#include <linux/irq.h>
#include <linux/spinlock.h>
+#include <linux/init.h>
#include <asm/sn/addrs.h>
#include <asm/sn/arch.h>
#include <asm/sn/intr.h>
int sn_force_interrupt_flag = 1;
extern int sn_ioif_inited;
-static struct list_head **sn_irq_lh;
+struct list_head **sn_irq_lh;
static spinlock_t sn_irq_info_lock = SPIN_LOCK_UNLOCKED; /* non-IRQ lock */
-static inline uint64_t sn_intr_alloc(nasid_t local_nasid, int local_widget,
- u64 sn_irq_info,
+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)
{
SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_INTERRUPT,
(u64) SAL_INTR_ALLOC, (u64) local_nasid,
- (u64) local_widget, (u64) sn_irq_info, (u64) req_irq,
+ (u64) local_widget, __pa(sn_irq_info), (u64) req_irq,
(u64) req_nasid, (u64) req_slice);
+
return ret_stuff.status;
}
-static inline void sn_intr_free(nasid_t local_nasid, int local_widget,
+void sn_intr_free(nasid_t local_nasid, int local_widget,
struct sn_irq_info *sn_irq_info)
{
struct ia64_sal_retval ret_stuff;
static void sn_ack_irq(unsigned int irq)
{
- u64 event_occurred, mask = 0;
+ u64 event_occurred, mask;
irq = irq & 0xff;
- event_occurred =
- HUB_L((u64*)LOCAL_MMR_ADDR(SH_EVENT_OCCURRED));
+ 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);
+ HUB_S((u64*)LOCAL_MMR_ADDR(SH_EVENT_OCCURRED_ALIAS), mask);
__set_bit(irq, (volatile void *)pda->sn_in_service_ivecs);
- move_irq(irq);
+ move_native_irq(irq);
}
static void sn_end_irq(unsigned int irq)
static void sn_irq_info_free(struct rcu_head *head);
-static void sn_set_affinity_irq(unsigned int irq, cpumask_t mask)
+struct sn_irq_info *sn_retarget_vector(struct sn_irq_info *sn_irq_info,
+ nasid_t nasid, int slice)
{
- struct sn_irq_info *sn_irq_info, *sn_irq_info_safe;
- int cpuid, cpuphys;
+ int vector;
+ int cpuphys;
+ int64_t bridge;
+ int local_widget, status;
+ nasid_t local_nasid;
+ struct sn_irq_info *new_irq_info;
+ struct sn_pcibus_provider *pci_provider;
- cpuid = first_cpu(mask);
- cpuphys = cpu_physical_id(cpuid);
+ new_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_ATOMIC);
+ if (new_irq_info == NULL)
+ return NULL;
- list_for_each_entry_safe(sn_irq_info, sn_irq_info_safe,
- sn_irq_lh[irq], list) {
- uint64_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)
- break;
- memcpy(new_irq_info, sn_irq_info, sizeof(struct sn_irq_info));
-
- bridge = (uint64_t) new_irq_info->irq_bridge;
- if (!bridge) {
- kfree(new_irq_info);
- break; /* irq is not a device interrupt */
- }
+ memcpy(new_irq_info, sn_irq_info, sizeof(struct sn_irq_info));
- local_nasid = NASID_GET(bridge);
+ bridge = (u64) new_irq_info->irq_bridge;
+ if (!bridge) {
+ kfree(new_irq_info);
+ return NULL; /* irq is not a device interrupt */
+ }
- if (local_nasid & 1)
- local_widget = TIO_SWIN_WIDGETNUM(bridge);
- else
- local_widget = SWIN_WIDGETNUM(bridge);
+ local_nasid = NASID_GET(bridge);
- /* Free the old PROM new_irq_info structure */
- sn_intr_free(local_nasid, local_widget, new_irq_info);
- /* Update kernels new_irq_info with new target info */
- unregister_intr_pda(new_irq_info);
+ if (local_nasid & 1)
+ local_widget = TIO_SWIN_WIDGETNUM(bridge);
+ else
+ local_widget = SWIN_WIDGETNUM(bridge);
- /* allocate a new PROM new_irq_info struct */
- status = sn_intr_alloc(local_nasid, local_widget,
- __pa(new_irq_info), irq,
- cpuid_to_nasid(cpuid),
- cpuid_to_slice(cpuid));
+ vector = sn_irq_info->irq_irq;
+ /* Free the old PROM new_irq_info structure */
+ sn_intr_free(local_nasid, local_widget, new_irq_info);
+ /* Update kernels new_irq_info with new target info */
+ unregister_intr_pda(new_irq_info);
- /* SAL call failed */
- if (status) {
- kfree(new_irq_info);
- break;
- }
+ /* allocate a new PROM new_irq_info struct */
+ status = sn_intr_alloc(local_nasid, local_widget,
+ new_irq_info, vector,
+ nasid, slice);
- new_irq_info->irq_cpuid = cpuid;
- register_intr_pda(new_irq_info);
+ /* SAL call failed */
+ if (status) {
+ kfree(new_irq_info);
+ return NULL;
+ }
+
+ cpuphys = nasid_slice_to_cpuid(nasid, slice);
+ new_irq_info->irq_cpuid = cpuphys;
+ register_intr_pda(new_irq_info);
- pci_provider = sn_pci_provider[new_irq_info->irq_bridge_type];
- if (pci_provider && pci_provider->target_interrupt)
- (pci_provider->target_interrupt)(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);
+ 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
- set_irq_affinity_info((irq & 0xff), cpuphys, 0);
+ 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));
+
+ 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);
}
struct hw_interrupt_type irq_type_sn = {
int i;
irq_desc_t *base_desc = irq_desc;
+ 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].handler == &no_irq_type) {
base_desc[i].handler = &irq_type_sn;
pdacpu(cpu)->sn_last_irq = irq;
}
- if (pdacpu(cpu)->sn_first_irq == 0 || pdacpu(cpu)->sn_first_irq > irq) {
+ 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)
/* 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);
- (void)register_intr_pda(sn_irq_info);
+ register_intr_pda(sn_irq_info);
}
void sn_irq_unfixup(struct pci_dev *pci_dev)
return;
sn_irq_info = SN_PCIDEV_INFO(pci_dev)->pdi_sn_irq_info;
- if (!sn_irq_info || !sn_irq_info->irq_irq) {
+ if (!sn_irq_info)
+ return;
+ if (!sn_irq_info->irq_irq) {
kfree(sn_irq_info);
return;
}
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);
+
}
static inline void
*/
static void sn_check_intr(int irq, struct sn_irq_info *sn_irq_info)
{
- uint64_t regval;
- int irr_reg_num;
- int irr_bit;
- uint64_t irr_reg;
+ u64 regval;
struct pcidev_info *pcidev_info;
struct pcibus_info *pcibus_info;
pdi_pcibus_info;
regval = pcireg_intr_status_get(pcibus_info);
- 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 (!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 &
rcu_read_unlock();
}
-void sn_irq_lh_init(void)
+void __init sn_irq_lh_init(void)
{
int i;
INIT_LIST_HEAD(sn_irq_lh[i]);
}
-
}
projects / linux-2.6-omap-h63xx.git / blobdiff