#include "cpumap.h"
#include "kstack.h"
-#define NUM_IVECS (IMAP_INR + 1)
-
struct ino_bucket *ivector_table;
unsigned long ivector_table_pa;
#define irq_work_pa(__cpu) &(trap_block[(__cpu)].irq_worklist_pa)
-static struct {
- unsigned int dev_handle;
- unsigned int dev_ino;
- unsigned int in_use;
-} irq_table[NR_IRQS];
-static DEFINE_SPINLOCK(irq_alloc_lock);
+static unsigned long hvirq_major __initdata;
+static int __init early_hvirq_major(char *p)
+{
+ int rc = kstrtoul(p, 10, &hvirq_major);
+
+ return rc;
+}
+early_param("hvirq", early_hvirq_major);
+
+static int hv_irq_version;
+
+/* Major version 2.0 of HV_GRP_INTR added support for the VIRQ cookie
+ * based interfaces, but:
+ *
+ * 1) Several OSs, Solaris and Linux included, use them even when only
+ * negotiating version 1.0 (or failing to negotiate at all). So the
+ * hypervisor has a workaround that provides the VIRQ interfaces even
+ * when only verion 1.0 of the API is in use.
+ *
+ * 2) Second, and more importantly, with major version 2.0 these VIRQ
+ * interfaces only were actually hooked up for LDC interrupts, even
+ * though the Hypervisor specification clearly stated:
+ *
+ * The new interrupt API functions will be available to a guest
+ * when it negotiates version 2.0 in the interrupt API group 0x2. When
+ * a guest negotiates version 2.0, all interrupt sources will only
+ * support using the cookie interface, and any attempt to use the
+ * version 1.0 interrupt APIs numbered 0xa0 to 0xa6 will result in the
+ * ENOTSUPPORTED error being returned.
+ *
+ * with an emphasis on "all interrupt sources".
+ *
+ * To correct this, major version 3.0 was created which does actually
+ * support VIRQs for all interrupt sources (not just LDC devices). So
+ * if we want to move completely over the cookie based VIRQs we must
+ * negotiate major version 3.0 or later of HV_GRP_INTR.
+ */
+static bool sun4v_cookie_only_virqs(void)
+{
+ if (hv_irq_version >= 3)
+ return true;
+ return false;
+}
-unsigned char irq_alloc(unsigned int dev_handle, unsigned int dev_ino)
+static void __init irq_init_hv(void)
{
- unsigned long flags;
- unsigned char ent;
+ unsigned long hv_error, major, minor = 0;
+
+ if (tlb_type != hypervisor)
+ return;
- BUILD_BUG_ON(NR_IRQS >= 256);
+ if (hvirq_major)
+ major = hvirq_major;
+ else
+ major = 3;
- spin_lock_irqsave(&irq_alloc_lock, flags);
+ hv_error = sun4v_hvapi_register(HV_GRP_INTR, major, &minor);
+ if (!hv_error)
+ hv_irq_version = major;
+ else
+ hv_irq_version = 1;
- for (ent = 1; ent < NR_IRQS; ent++) {
- if (!irq_table[ent].in_use)
+ pr_info("SUN4V: Using IRQ API major %d, cookie only virqs %s\n",
+ hv_irq_version,
+ sun4v_cookie_only_virqs() ? "enabled" : "disabled");
+}
+
+/* This function is for the timer interrupt.*/
+int __init arch_probe_nr_irqs(void)
+{
+ return 1;
+}
+
+#define DEFAULT_NUM_IVECS (0xfffU)
+static unsigned int nr_ivec = DEFAULT_NUM_IVECS;
+#define NUM_IVECS (nr_ivec)
+
+static unsigned int __init size_nr_ivec(void)
+{
+ if (tlb_type == hypervisor) {
+ switch (sun4v_chip_type) {
+ /* Athena's devhandle|devino is large.*/
+ case SUN4V_CHIP_SPARC64X:
+ nr_ivec = 0xffff;
break;
+ }
}
- if (ent >= NR_IRQS) {
- printk(KERN_ERR "IRQ: Out of virtual IRQs.\n");
- ent = 0;
- } else {
- irq_table[ent].dev_handle = dev_handle;
- irq_table[ent].dev_ino = dev_ino;
- irq_table[ent].in_use = 1;
- }
+ return nr_ivec;
+}
+
+struct irq_handler_data {
+ union {
+ struct {
+ unsigned int dev_handle;
+ unsigned int dev_ino;
+ };
+ unsigned long sysino;
+ };
+ struct ino_bucket bucket;
+ unsigned long iclr;
+ unsigned long imap;
+};
+
+static inline unsigned int irq_data_to_handle(struct irq_data *data)
+{
+ struct irq_handler_data *ihd = data->handler_data;
+
+ return ihd->dev_handle;
+}
+
+static inline unsigned int irq_data_to_ino(struct irq_data *data)
+{
+ struct irq_handler_data *ihd = data->handler_data;
- spin_unlock_irqrestore(&irq_alloc_lock, flags);
+ return ihd->dev_ino;
+}
+
+static inline unsigned long irq_data_to_sysino(struct irq_data *data)
+{
+ struct irq_handler_data *ihd = data->handler_data;
- return ent;
+ return ihd->sysino;
}
-#ifdef CONFIG_PCI_MSI
void irq_free(unsigned int irq)
{
- unsigned long flags;
+ void *data = irq_get_handler_data(irq);
- if (irq >= NR_IRQS)
- return;
+ kfree(data);
+ irq_set_handler_data(irq, NULL);
+ irq_free_descs(irq, 1);
+}
- spin_lock_irqsave(&irq_alloc_lock, flags);
+unsigned int irq_alloc(unsigned int dev_handle, unsigned int dev_ino)
+{
+ int irq;
- irq_table[irq].in_use = 0;
+ irq = __irq_alloc_descs(-1, 1, 1, numa_node_id(), NULL);
+ if (irq <= 0)
+ goto out;
- spin_unlock_irqrestore(&irq_alloc_lock, flags);
+ return irq;
+out:
+ return 0;
+}
+
+static unsigned int cookie_exists(u32 devhandle, unsigned int devino)
+{
+ unsigned long hv_err, cookie;
+ struct ino_bucket *bucket;
+ unsigned int irq = 0U;
+
+ hv_err = sun4v_vintr_get_cookie(devhandle, devino, &cookie);
+ if (hv_err) {
+ pr_err("HV get cookie failed hv_err = %ld\n", hv_err);
+ goto out;
+ }
+
+ if (cookie & ((1UL << 63UL))) {
+ cookie = ~cookie;
+ bucket = (struct ino_bucket *) __va(cookie);
+ irq = bucket->__irq;
+ }
+out:
+ return irq;
+}
+
+static unsigned int sysino_exists(u32 devhandle, unsigned int devino)
+{
+ unsigned long sysino = sun4v_devino_to_sysino(devhandle, devino);
+ struct ino_bucket *bucket;
+ unsigned int irq;
+
+ bucket = &ivector_table[sysino];
+ irq = bucket_get_irq(__pa(bucket));
+
+ return irq;
+}
+
+void ack_bad_irq(unsigned int irq)
+{
+ pr_crit("BAD IRQ ack %d\n", irq);
+}
+
+void irq_install_pre_handler(int irq,
+ void (*func)(unsigned int, void *, void *),
+ void *arg1, void *arg2)
+{
+ pr_warn("IRQ pre handler NOT supported.\n");
}
-#endif
/*
* /proc/interrupts printing:
return tid;
}
-struct irq_handler_data {
- unsigned long iclr;
- unsigned long imap;
-
- void (*pre_handler)(unsigned int, void *, void *);
- void *arg1;
- void *arg2;
-};
-
#ifdef CONFIG_SMP
static int irq_choose_cpu(unsigned int irq, const struct cpumask *affinity)
{
static void sun4v_irq_enable(struct irq_data *data)
{
- unsigned int ino = irq_table[data->irq].dev_ino;
unsigned long cpuid = irq_choose_cpu(data->irq, data->affinity);
+ unsigned int ino = irq_data_to_sysino(data);
int err;
err = sun4v_intr_settarget(ino, cpuid);
static int sun4v_set_affinity(struct irq_data *data,
const struct cpumask *mask, bool force)
{
- unsigned int ino = irq_table[data->irq].dev_ino;
unsigned long cpuid = irq_choose_cpu(data->irq, mask);
+ unsigned int ino = irq_data_to_sysino(data);
int err;
err = sun4v_intr_settarget(ino, cpuid);
static void sun4v_irq_disable(struct irq_data *data)
{
- unsigned int ino = irq_table[data->irq].dev_ino;
+ unsigned int ino = irq_data_to_sysino(data);
int err;
err = sun4v_intr_setenabled(ino, HV_INTR_DISABLED);
static void sun4v_irq_eoi(struct irq_data *data)
{
- unsigned int ino = irq_table[data->irq].dev_ino;
+ unsigned int ino = irq_data_to_sysino(data);
int err;
err = sun4v_intr_setstate(ino, HV_INTR_STATE_IDLE);
static void sun4v_virq_enable(struct irq_data *data)
{
- unsigned long cpuid, dev_handle, dev_ino;
+ unsigned long dev_handle = irq_data_to_handle(data);
+ unsigned long dev_ino = irq_data_to_ino(data);
+ unsigned long cpuid;
int err;
cpuid = irq_choose_cpu(data->irq, data->affinity);
- dev_handle = irq_table[data->irq].dev_handle;
- dev_ino = irq_table[data->irq].dev_ino;
-
err = sun4v_vintr_set_target(dev_handle, dev_ino, cpuid);
if (err != HV_EOK)
printk(KERN_ERR "sun4v_vintr_set_target(%lx,%lx,%lu): "
static int sun4v_virt_set_affinity(struct irq_data *data,
const struct cpumask *mask, bool force)
{
- unsigned long cpuid, dev_handle, dev_ino;
+ unsigned long dev_handle = irq_data_to_handle(data);
+ unsigned long dev_ino = irq_data_to_ino(data);
+ unsigned long cpuid;
int err;
cpuid = irq_choose_cpu(data->irq, mask);
- dev_handle = irq_table[data->irq].dev_handle;
- dev_ino = irq_table[data->irq].dev_ino;
-
err = sun4v_vintr_set_target(dev_handle, dev_ino, cpuid);
if (err != HV_EOK)
printk(KERN_ERR "sun4v_vintr_set_target(%lx,%lx,%lu): "
static void sun4v_virq_disable(struct irq_data *data)
{
- unsigned long dev_handle, dev_ino;
+ unsigned long dev_handle = irq_data_to_handle(data);
+ unsigned long dev_ino = irq_data_to_ino(data);
int err;
- dev_handle = irq_table[data->irq].dev_handle;
- dev_ino = irq_table[data->irq].dev_ino;
err = sun4v_vintr_set_valid(dev_handle, dev_ino,
HV_INTR_DISABLED);
static void sun4v_virq_eoi(struct irq_data *data)
{
- unsigned long dev_handle, dev_ino;
+ unsigned long dev_handle = irq_data_to_handle(data);
+ unsigned long dev_ino = irq_data_to_ino(data);
int err;
- dev_handle = irq_table[data->irq].dev_handle;
- dev_ino = irq_table[data->irq].dev_ino;
-
err = sun4v_vintr_set_state(dev_handle, dev_ino,
HV_INTR_STATE_IDLE);
if (err != HV_EOK)
.flags = IRQCHIP_EOI_IF_HANDLED,
};
-static void pre_flow_handler(struct irq_data *d)
-{
- struct irq_handler_data *handler_data = irq_data_get_irq_handler_data(d);
- unsigned int ino = irq_table[d->irq].dev_ino;
-
- handler_data->pre_handler(ino, handler_data->arg1, handler_data->arg2);
-}
-
-void irq_install_pre_handler(int irq,
- void (*func)(unsigned int, void *, void *),
- void *arg1, void *arg2)
-{
- struct irq_handler_data *handler_data = irq_get_handler_data(irq);
-
- handler_data->pre_handler = func;
- handler_data->arg1 = arg1;
- handler_data->arg2 = arg2;
-
- __irq_set_preflow_handler(irq, pre_flow_handler);
-}
-
unsigned int build_irq(int inofixup, unsigned long iclr, unsigned long imap)
{
- struct ino_bucket *bucket;
struct irq_handler_data *handler_data;
+ struct ino_bucket *bucket;
unsigned int irq;
int ino;
return irq;
}
-static unsigned int sun4v_build_common(unsigned long sysino,
- struct irq_chip *chip)
+static unsigned int sun4v_build_common(u32 devhandle, unsigned int devino,
+ void (*handler_data_init)(struct irq_handler_data *data,
+ u32 devhandle, unsigned int devino),
+ struct irq_chip *chip)
{
- struct ino_bucket *bucket;
- struct irq_handler_data *handler_data;
+ struct irq_handler_data *data;
unsigned int irq;
- BUG_ON(tlb_type != hypervisor);
+ irq = irq_alloc(devhandle, devino);
+ if (!irq)
+ goto out;
- bucket = &ivector_table[sysino];
- irq = bucket_get_irq(__pa(bucket));
- if (!irq) {
- irq = irq_alloc(0, sysino);
- bucket_set_irq(__pa(bucket), irq);
- irq_set_chip_and_handler_name(irq, chip, handle_fasteoi_irq,
- "IVEC");
+ data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC);
+ if (unlikely(!data)) {
+ pr_err("IRQ handler data allocation failed.\n");
+ irq_free(irq);
+ irq = 0;
+ goto out;
}
- handler_data = irq_get_handler_data(irq);
- if (unlikely(handler_data))
- goto out;
+ irq_set_handler_data(irq, data);
+ handler_data_init(data, devhandle, devino);
+ irq_set_chip_and_handler_name(irq, chip, handle_fasteoi_irq, "IVEC");
+ data->imap = ~0UL;
+ data->iclr = ~0UL;
+out:
+ return irq;
+}
- handler_data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC);
- if (unlikely(!handler_data)) {
- prom_printf("IRQ: kzalloc(irq_handler_data) failed.\n");
- prom_halt();
- }
- irq_set_handler_data(irq, handler_data);
+static unsigned long cookie_assign(unsigned int irq, u32 devhandle,
+ unsigned int devino)
+{
+ struct irq_handler_data *ihd = irq_get_handler_data(irq);
+ unsigned long hv_error, cookie;
- /* Catch accidental accesses to these things. IMAP/ICLR handling
- * is done by hypervisor calls on sun4v platforms, not by direct
- * register accesses.
+ /* handler_irq needs to find the irq. cookie is seen signed in
+ * sun4v_dev_mondo and treated as a non ivector_table delivery.
*/
- handler_data->imap = ~0UL;
- handler_data->iclr = ~0UL;
+ ihd->bucket.__irq = irq;
+ cookie = ~__pa(&ihd->bucket);
-out:
- return irq;
+ hv_error = sun4v_vintr_set_cookie(devhandle, devino, cookie);
+ if (hv_error)
+ pr_err("HV vintr set cookie failed = %ld\n", hv_error);
+
+ return hv_error;
}
-unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino)
+static void cookie_handler_data(struct irq_handler_data *data,
+ u32 devhandle, unsigned int devino)
{
- unsigned long sysino = sun4v_devino_to_sysino(devhandle, devino);
+ data->dev_handle = devhandle;
+ data->dev_ino = devino;
+}
- return sun4v_build_common(sysino, &sun4v_irq);
+static unsigned int cookie_build_irq(u32 devhandle, unsigned int devino,
+ struct irq_chip *chip)
+{
+ unsigned long hv_error;
+ unsigned int irq;
+
+ irq = sun4v_build_common(devhandle, devino, cookie_handler_data, chip);
+
+ hv_error = cookie_assign(irq, devhandle, devino);
+ if (hv_error) {
+ irq_free(irq);
+ irq = 0;
+ }
+
+ return irq;
}
-unsigned int sun4v_build_virq(u32 devhandle, unsigned int devino)
+static unsigned int sun4v_build_cookie(u32 devhandle, unsigned int devino)
{
- struct irq_handler_data *handler_data;
- unsigned long hv_err, cookie;
- struct ino_bucket *bucket;
unsigned int irq;
- bucket = kzalloc(sizeof(struct ino_bucket), GFP_ATOMIC);
- if (unlikely(!bucket))
- return 0;
+ irq = cookie_exists(devhandle, devino);
+ if (irq)
+ goto out;
- /* The only reference we store to the IRQ bucket is
- * by physical address which kmemleak can't see, tell
- * it that this object explicitly is not a leak and
- * should be scanned.
- */
- kmemleak_not_leak(bucket);
+ irq = cookie_build_irq(devhandle, devino, &sun4v_virq);
- __flush_dcache_range((unsigned long) bucket,
- ((unsigned long) bucket +
- sizeof(struct ino_bucket)));
+out:
+ return irq;
+}
- irq = irq_alloc(devhandle, devino);
+static void sysino_set_bucket(unsigned int irq)
+{
+ struct irq_handler_data *ihd = irq_get_handler_data(irq);
+ struct ino_bucket *bucket;
+ unsigned long sysino;
+
+ sysino = sun4v_devino_to_sysino(ihd->dev_handle, ihd->dev_ino);
+ BUG_ON(sysino >= nr_ivec);
+ bucket = &ivector_table[sysino];
bucket_set_irq(__pa(bucket), irq);
+}
- irq_set_chip_and_handler_name(irq, &sun4v_virq, handle_fasteoi_irq,
- "IVEC");
+static void sysino_handler_data(struct irq_handler_data *data,
+ u32 devhandle, unsigned int devino)
+{
+ unsigned long sysino;
- handler_data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC);
- if (unlikely(!handler_data))
- return 0;
+ sysino = sun4v_devino_to_sysino(devhandle, devino);
+ data->sysino = sysino;
+}
- /* In order to make the LDC channel startup sequence easier,
- * especially wrt. locking, we do not let request_irq() enable
- * the interrupt.
- */
- irq_set_status_flags(irq, IRQ_NOAUTOEN);
- irq_set_handler_data(irq, handler_data);
+static unsigned int sysino_build_irq(u32 devhandle, unsigned int devino,
+ struct irq_chip *chip)
+{
+ unsigned int irq;
- /* Catch accidental accesses to these things. IMAP/ICLR handling
- * is done by hypervisor calls on sun4v platforms, not by direct
- * register accesses.
- */
- handler_data->imap = ~0UL;
- handler_data->iclr = ~0UL;
+ irq = sun4v_build_common(devhandle, devino, sysino_handler_data, chip);
+ if (!irq)
+ goto out;
- cookie = ~__pa(bucket);
- hv_err = sun4v_vintr_set_cookie(devhandle, devino, cookie);
- if (hv_err) {
- prom_printf("IRQ: Fatal, cannot set cookie for [%x:%x] "
- "err=%lu\n", devhandle, devino, hv_err);
- prom_halt();
- }
+ sysino_set_bucket(irq);
+out:
+ return irq;
+}
+static int sun4v_build_sysino(u32 devhandle, unsigned int devino)
+{
+ int irq;
+
+ irq = sysino_exists(devhandle, devino);
+ if (irq)
+ goto out;
+
+ irq = sysino_build_irq(devhandle, devino, &sun4v_irq);
+out:
return irq;
}
-void ack_bad_irq(unsigned int irq)
+unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino)
{
- unsigned int ino = irq_table[irq].dev_ino;
+ unsigned int irq;
- if (!ino)
- ino = 0xdeadbeef;
+ if (sun4v_cookie_only_virqs())
+ irq = sun4v_build_cookie(devhandle, devino);
+ else
+ irq = sun4v_build_sysino(devhandle, devino);
- printk(KERN_CRIT "Unexpected IRQ from ino[%x] irq[%u]\n",
- ino, irq);
+ return irq;
+}
+
+unsigned int sun4v_build_virq(u32 devhandle, unsigned int devino)
+{
+ int irq;
+
+ irq = cookie_build_irq(devhandle, devino, &sun4v_virq);
+ if (!irq)
+ goto out;
+
+ /* This is borrowed from the original function.
+ */
+ irq_set_status_flags(irq, IRQ_NOAUTOEN);
+
+out:
+ return irq;
}
void *hardirq_stack[NR_CPUS];
for (irq = 0; irq < NR_IRQS; irq++) {
struct irq_desc *desc = irq_to_desc(irq);
- struct irq_data *data = irq_desc_get_irq_data(desc);
+ struct irq_data *data;
unsigned long flags;
+ if (!desc)
+ continue;
+ data = irq_desc_get_irq_data(desc);
raw_spin_lock_irqsave(&desc->lock, flags);
if (desc->action && !irqd_is_per_cpu(data)) {
if (data->chip->irq_set_affinity)
.name = "timer",
};
-/* Only invoked on boot processor. */
-void __init init_IRQ(void)
+static void __init irq_ivector_init(void)
{
- unsigned long size;
+ unsigned long size, order;
+ unsigned int ivecs;
- map_prom_timers();
- kill_prom_timer();
+ /* If we are doing cookie only VIRQs then we do not need the ivector
+ * table to process interrupts.
+ */
+ if (sun4v_cookie_only_virqs())
+ return;
- size = sizeof(struct ino_bucket) * NUM_IVECS;
- ivector_table = kzalloc(size, GFP_KERNEL);
+ ivecs = size_nr_ivec();
+ size = sizeof(struct ino_bucket) * ivecs;
+ order = get_order(size);
+ ivector_table = (struct ino_bucket *)
+ __get_free_pages(GFP_KERNEL | __GFP_ZERO, order);
if (!ivector_table) {
prom_printf("Fatal error, cannot allocate ivector_table\n");
prom_halt();
((unsigned long) ivector_table) + size);
ivector_table_pa = __pa(ivector_table);
+}
+
+/* Only invoked on boot processor.*/
+void __init init_IRQ(void)
+{
+ irq_init_hv();
+ irq_ivector_init();
+ map_prom_timers();
+ kill_prom_timer();
if (tlb_type == hypervisor)
sun4v_init_mondo_queues();
projects / linux.git / commitdiff