#include <linux/seq_file.h>
#include <linux/bootmem.h>
#include <linux/irq.h>
-#include <linux/msi.h>
#include <asm/ptrace.h>
#include <asm/processor.h>
#include <asm/auxio.h>
#include <asm/head.h>
#include <asm/hypervisor.h>
+#include <asm/cacheflush.h>
/* UPA nodes send interrupt packet to UltraSparc with first data reg
* value low 5 (7 on Starfire) bits holding the IRQ identifier being
* To make processing these packets efficient and race free we use
* an array of irq buckets below. The interrupt vector handler in
* entry.S feeds incoming packets into per-cpu pil-indexed lists.
- * The IVEC handler does not need to act atomically, the PIL dispatch
- * code uses CAS to get an atomic snapshot of the list and clear it
- * at the same time.
*
* If you make changes to ino_bucket, please update hand coded assembler
* of the vectored interrupt trap handler(s) in entry.S and sun4v_ivec.S
*/
struct ino_bucket {
- /* Next handler in per-CPU IRQ worklist. We know that
- * bucket pointers have the high 32-bits clear, so to
- * save space we only store the bits we need.
- */
-/*0x00*/unsigned int irq_chain;
+/*0x00*/unsigned long __irq_chain_pa;
/* Virtual interrupt number assigned to this INO. */
-/*0x04*/unsigned int virt_irq;
+/*0x08*/unsigned int __virt_irq;
+/*0x0c*/unsigned int __pad;
};
#define NUM_IVECS (IMAP_INR + 1)
-struct ino_bucket ivector_table[NUM_IVECS] __attribute__ ((aligned (SMP_CACHE_BYTES)));
-
-#define __irq_ino(irq) \
- (((struct ino_bucket *)(unsigned long)(irq)) - &ivector_table[0])
-#define __bucket(irq) ((struct ino_bucket *)(unsigned long)(irq))
-#define __irq(bucket) ((unsigned int)(unsigned long)(bucket))
-
-/* This has to be in the main kernel image, it cannot be
- * turned into per-cpu data. The reason is that the main
- * kernel image is locked into the TLB and this structure
- * is accessed from the vectored interrupt trap handler. If
- * access to this structure takes a TLB miss it could cause
- * the 5-level sparc v9 trap stack to overflow.
+struct ino_bucket *ivector_table;
+unsigned long ivector_table_pa;
+
+/* On several sun4u processors, it is illegal to mix bypass and
+ * non-bypass accesses. Therefore we access all INO buckets
+ * using bypass accesses only.
*/
-#define irq_work(__cpu) &(trap_block[(__cpu)].irq_worklist)
+static unsigned long bucket_get_chain_pa(unsigned long bucket_pa)
+{
+ unsigned long ret;
+
+ __asm__ __volatile__("ldxa [%1] %2, %0"
+ : "=&r" (ret)
+ : "r" (bucket_pa +
+ offsetof(struct ino_bucket,
+ __irq_chain_pa)),
+ "i" (ASI_PHYS_USE_EC));
+
+ return ret;
+}
+
+static void bucket_clear_chain_pa(unsigned long bucket_pa)
+{
+ __asm__ __volatile__("stxa %%g0, [%0] %1"
+ : /* no outputs */
+ : "r" (bucket_pa +
+ offsetof(struct ino_bucket,
+ __irq_chain_pa)),
+ "i" (ASI_PHYS_USE_EC));
+}
+
+static unsigned int bucket_get_virt_irq(unsigned long bucket_pa)
+{
+ unsigned int ret;
+
+ __asm__ __volatile__("lduwa [%1] %2, %0"
+ : "=&r" (ret)
+ : "r" (bucket_pa +
+ offsetof(struct ino_bucket,
+ __virt_irq)),
+ "i" (ASI_PHYS_USE_EC));
+
+ return ret;
+}
+
+static void bucket_set_virt_irq(unsigned long bucket_pa,
+ unsigned int virt_irq)
+{
+ __asm__ __volatile__("stwa %0, [%1] %2"
+ : /* no outputs */
+ : "r" (virt_irq),
+ "r" (bucket_pa +
+ offsetof(struct ino_bucket,
+ __virt_irq)),
+ "i" (ASI_PHYS_USE_EC));
+}
+
+#define irq_work_pa(__cpu) &(trap_block[(__cpu)].irq_worklist_pa)
static struct {
- unsigned int irq;
unsigned int dev_handle;
unsigned int dev_ino;
-} virt_to_real_irq_table[NR_IRQS];
+ unsigned int in_use;
+} virt_irq_table[NR_IRQS];
+static DEFINE_SPINLOCK(virt_irq_alloc_lock);
-static unsigned char virt_irq_alloc(unsigned int real_irq)
+unsigned char virt_irq_alloc(unsigned int dev_handle,
+ unsigned int dev_ino)
{
+ unsigned long flags;
unsigned char ent;
BUILD_BUG_ON(NR_IRQS >= 256);
+ spin_lock_irqsave(&virt_irq_alloc_lock, flags);
+
for (ent = 1; ent < NR_IRQS; ent++) {
- if (!virt_to_real_irq_table[ent].irq)
+ if (!virt_irq_table[ent].in_use)
break;
}
if (ent >= NR_IRQS) {
printk(KERN_ERR "IRQ: Out of virtual IRQs.\n");
- return 0;
+ ent = 0;
+ } else {
+ virt_irq_table[ent].dev_handle = dev_handle;
+ virt_irq_table[ent].dev_ino = dev_ino;
+ virt_irq_table[ent].in_use = 1;
}
- virt_to_real_irq_table[ent].irq = real_irq;
+ spin_unlock_irqrestore(&virt_irq_alloc_lock, flags);
return ent;
}
#ifdef CONFIG_PCI_MSI
-static void virt_irq_free(unsigned int virt_irq)
+void virt_irq_free(unsigned int virt_irq)
{
- unsigned int real_irq;
+ unsigned long flags;
if (virt_irq >= NR_IRQS)
return;
- real_irq = virt_to_real_irq_table[virt_irq].irq;
- virt_to_real_irq_table[virt_irq].irq = 0;
+ spin_lock_irqsave(&virt_irq_alloc_lock, flags);
- __bucket(real_irq)->virt_irq = 0;
-}
-#endif
+ virt_irq_table[virt_irq].in_use = 0;
-static unsigned int virt_to_real_irq(unsigned char virt_irq)
-{
- return virt_to_real_irq_table[virt_irq].irq;
+ spin_unlock_irqrestore(&virt_irq_alloc_lock, flags);
}
+#endif
/*
* /proc/interrupts printing:
void *pre_handler_arg2;
};
-static inline struct ino_bucket *virt_irq_to_bucket(unsigned int virt_irq)
-{
- unsigned int real_irq = virt_to_real_irq(virt_irq);
- struct ino_bucket *bucket = NULL;
-
- if (likely(real_irq))
- bucket = __bucket(real_irq);
-
- return bucket;
-}
-
#ifdef CONFIG_SMP
static int irq_choose_cpu(unsigned int virt_irq)
{
if (likely(data)) {
unsigned long imap = data->imap;
- u32 tmp = upa_readq(imap);
+ unsigned long tmp = upa_readq(imap);
tmp &= ~IMAP_VALID;
upa_writeq(tmp, imap);
static void sun4v_irq_enable(unsigned int virt_irq)
{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
- unsigned int ino = bucket - &ivector_table[0];
-
- if (likely(bucket)) {
- unsigned long cpuid;
- int err;
-
- cpuid = irq_choose_cpu(virt_irq);
+ unsigned int ino = virt_irq_table[virt_irq].dev_ino;
+ unsigned long cpuid = irq_choose_cpu(virt_irq);
+ int err;
- err = sun4v_intr_settarget(ino, cpuid);
- if (err != HV_EOK)
- printk(KERN_ERR "sun4v_intr_settarget(%x,%lu): "
- "err(%d)\n", ino, cpuid, err);
- err = sun4v_intr_setstate(ino, HV_INTR_STATE_IDLE);
- if (err != HV_EOK)
- printk(KERN_ERR "sun4v_intr_setstate(%x): "
- "err(%d)\n", ino, err);
- err = sun4v_intr_setenabled(ino, HV_INTR_ENABLED);
- if (err != HV_EOK)
- printk(KERN_ERR "sun4v_intr_setenabled(%x): err(%d)\n",
- ino, err);
- }
+ err = sun4v_intr_settarget(ino, cpuid);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_intr_settarget(%x,%lu): "
+ "err(%d)\n", ino, cpuid, err);
+ err = sun4v_intr_setstate(ino, HV_INTR_STATE_IDLE);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_intr_setstate(%x): "
+ "err(%d)\n", ino, err);
+ err = sun4v_intr_setenabled(ino, HV_INTR_ENABLED);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_intr_setenabled(%x): err(%d)\n",
+ ino, err);
}
static void sun4v_set_affinity(unsigned int virt_irq, cpumask_t mask)
{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
- unsigned int ino = bucket - &ivector_table[0];
-
- if (likely(bucket)) {
- unsigned long cpuid;
- int err;
+ unsigned int ino = virt_irq_table[virt_irq].dev_ino;
+ unsigned long cpuid = irq_choose_cpu(virt_irq);
+ int err;
- cpuid = irq_choose_cpu(virt_irq);
-
- err = sun4v_intr_settarget(ino, cpuid);
- if (err != HV_EOK)
- printk(KERN_ERR "sun4v_intr_settarget(%x,%lu): "
- "err(%d)\n", ino, cpuid, err);
- }
+ err = sun4v_intr_settarget(ino, cpuid);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_intr_settarget(%x,%lu): "
+ "err(%d)\n", ino, cpuid, err);
}
static void sun4v_irq_disable(unsigned int virt_irq)
{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
- unsigned int ino = bucket - &ivector_table[0];
-
- if (likely(bucket)) {
- int err;
-
- err = sun4v_intr_setenabled(ino, HV_INTR_DISABLED);
- if (err != HV_EOK)
- printk(KERN_ERR "sun4v_intr_setenabled(%x): "
- "err(%d)\n", ino, err);
- }
-}
-
-#ifdef CONFIG_PCI_MSI
-static void sun4v_msi_enable(unsigned int virt_irq)
-{
- sun4v_irq_enable(virt_irq);
- unmask_msi_irq(virt_irq);
-}
+ unsigned int ino = virt_irq_table[virt_irq].dev_ino;
+ int err;
-static void sun4v_msi_disable(unsigned int virt_irq)
-{
- mask_msi_irq(virt_irq);
- sun4v_irq_disable(virt_irq);
+ err = sun4v_intr_setenabled(ino, HV_INTR_DISABLED);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_intr_setenabled(%x): "
+ "err(%d)\n", ino, err);
}
-#endif
static void sun4v_irq_end(unsigned int virt_irq)
{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
- unsigned int ino = bucket - &ivector_table[0];
+ unsigned int ino = virt_irq_table[virt_irq].dev_ino;
struct irq_desc *desc = irq_desc + virt_irq;
+ int err;
if (unlikely(desc->status & (IRQ_DISABLED|IRQ_INPROGRESS)))
return;
- if (likely(bucket)) {
- int err;
-
- err = sun4v_intr_setstate(ino, HV_INTR_STATE_IDLE);
- if (err != HV_EOK)
- printk(KERN_ERR "sun4v_intr_setstate(%x): "
- "err(%d)\n", ino, err);
- }
+ err = sun4v_intr_setstate(ino, HV_INTR_STATE_IDLE);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_intr_setstate(%x): "
+ "err(%d)\n", ino, err);
}
static void sun4v_virq_enable(unsigned int virt_irq)
{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
-
- if (likely(bucket)) {
- unsigned long cpuid, dev_handle, dev_ino;
- int err;
-
- cpuid = irq_choose_cpu(virt_irq);
-
- dev_handle = virt_to_real_irq_table[virt_irq].dev_handle;
- dev_ino = virt_to_real_irq_table[virt_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): "
- "err(%d)\n",
- dev_handle, dev_ino, cpuid, err);
- err = sun4v_vintr_set_state(dev_handle, dev_ino,
- HV_INTR_STATE_IDLE);
- if (err != HV_EOK)
- printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx,"
- "HV_INTR_STATE_IDLE): err(%d)\n",
- dev_handle, dev_ino, err);
- err = sun4v_vintr_set_valid(dev_handle, dev_ino,
- HV_INTR_ENABLED);
- if (err != HV_EOK)
- printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx,"
- "HV_INTR_ENABLED): err(%d)\n",
- dev_handle, dev_ino, err);
- }
+ unsigned long cpuid, dev_handle, dev_ino;
+ int err;
+
+ cpuid = irq_choose_cpu(virt_irq);
+
+ dev_handle = virt_irq_table[virt_irq].dev_handle;
+ dev_ino = virt_irq_table[virt_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): "
+ "err(%d)\n",
+ dev_handle, dev_ino, cpuid, err);
+ err = sun4v_vintr_set_state(dev_handle, dev_ino,
+ HV_INTR_STATE_IDLE);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx,"
+ "HV_INTR_STATE_IDLE): err(%d)\n",
+ dev_handle, dev_ino, err);
+ err = sun4v_vintr_set_valid(dev_handle, dev_ino,
+ HV_INTR_ENABLED);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx,"
+ "HV_INTR_ENABLED): err(%d)\n",
+ dev_handle, dev_ino, err);
}
static void sun4v_virt_set_affinity(unsigned int virt_irq, cpumask_t mask)
{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+ unsigned long cpuid, dev_handle, dev_ino;
+ int err;
- if (likely(bucket)) {
- unsigned long cpuid, dev_handle, dev_ino;
- int err;
+ cpuid = irq_choose_cpu(virt_irq);
- cpuid = irq_choose_cpu(virt_irq);
+ dev_handle = virt_irq_table[virt_irq].dev_handle;
+ dev_ino = virt_irq_table[virt_irq].dev_ino;
- dev_handle = virt_to_real_irq_table[virt_irq].dev_handle;
- dev_ino = virt_to_real_irq_table[virt_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): "
- "err(%d)\n",
- dev_handle, dev_ino, cpuid, err);
- }
+ err = sun4v_vintr_set_target(dev_handle, dev_ino, cpuid);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_vintr_set_target(%lx,%lx,%lu): "
+ "err(%d)\n",
+ dev_handle, dev_ino, cpuid, err);
}
static void sun4v_virq_disable(unsigned int virt_irq)
{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+ unsigned long dev_handle, dev_ino;
+ int err;
- if (likely(bucket)) {
- unsigned long dev_handle, dev_ino;
- int err;
+ dev_handle = virt_irq_table[virt_irq].dev_handle;
+ dev_ino = virt_irq_table[virt_irq].dev_ino;
- dev_handle = virt_to_real_irq_table[virt_irq].dev_handle;
- dev_ino = virt_to_real_irq_table[virt_irq].dev_ino;
-
- err = sun4v_vintr_set_valid(dev_handle, dev_ino,
- HV_INTR_DISABLED);
- if (err != HV_EOK)
- printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx,"
- "HV_INTR_DISABLED): err(%d)\n",
- dev_handle, dev_ino, err);
- }
+ err = sun4v_vintr_set_valid(dev_handle, dev_ino,
+ HV_INTR_DISABLED);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx,"
+ "HV_INTR_DISABLED): err(%d)\n",
+ dev_handle, dev_ino, err);
}
static void sun4v_virq_end(unsigned int virt_irq)
{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
struct irq_desc *desc = irq_desc + virt_irq;
+ unsigned long dev_handle, dev_ino;
+ int err;
if (unlikely(desc->status & (IRQ_DISABLED|IRQ_INPROGRESS)))
return;
- if (likely(bucket)) {
- unsigned long dev_handle, dev_ino;
- int err;
+ dev_handle = virt_irq_table[virt_irq].dev_handle;
+ dev_ino = virt_irq_table[virt_irq].dev_ino;
- dev_handle = virt_to_real_irq_table[virt_irq].dev_handle;
- dev_ino = virt_to_real_irq_table[virt_irq].dev_ino;
-
- err = sun4v_vintr_set_state(dev_handle, dev_ino,
- HV_INTR_STATE_IDLE);
- if (err != HV_EOK)
- printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx,"
- "HV_INTR_STATE_IDLE): err(%d)\n",
- dev_handle, dev_ino, err);
- }
+ err = sun4v_vintr_set_state(dev_handle, dev_ino,
+ HV_INTR_STATE_IDLE);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx,"
+ "HV_INTR_STATE_IDLE): err(%d)\n",
+ dev_handle, dev_ino, err);
}
static void run_pre_handler(unsigned int virt_irq)
{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
struct irq_handler_data *data = get_irq_chip_data(virt_irq);
+ unsigned int ino;
+ ino = virt_irq_table[virt_irq].dev_ino;
if (likely(data->pre_handler)) {
- data->pre_handler(__irq_ino(__irq(bucket)),
+ data->pre_handler(ino,
data->pre_handler_arg1,
data->pre_handler_arg2);
}
.set_affinity = sun4v_set_affinity,
};
-static struct irq_chip sun4v_irq_ack = {
- .typename = "sun4v+ack",
- .enable = sun4v_irq_enable,
- .disable = sun4v_irq_disable,
- .ack = run_pre_handler,
- .end = sun4v_irq_end,
- .set_affinity = sun4v_set_affinity,
-};
-
-#ifdef CONFIG_PCI_MSI
-static struct irq_chip sun4v_msi = {
- .typename = "sun4v+msi",
- .mask = mask_msi_irq,
- .unmask = unmask_msi_irq,
- .enable = sun4v_msi_enable,
- .disable = sun4v_msi_disable,
- .ack = run_pre_handler,
- .end = sun4v_irq_end,
- .set_affinity = sun4v_set_affinity,
-};
-#endif
-
static struct irq_chip sun4v_virq = {
.typename = "vsun4v",
.enable = sun4v_virq_enable,
.set_affinity = sun4v_virt_set_affinity,
};
-static struct irq_chip sun4v_virq_ack = {
- .typename = "vsun4v+ack",
- .enable = sun4v_virq_enable,
- .disable = sun4v_virq_disable,
- .ack = run_pre_handler,
- .end = sun4v_virq_end,
- .set_affinity = sun4v_virt_set_affinity,
-};
-
void irq_install_pre_handler(int virt_irq,
void (*func)(unsigned int, void *, void *),
void *arg1, void *arg2)
{
struct irq_handler_data *data = get_irq_chip_data(virt_irq);
- struct irq_chip *chip;
+ struct irq_chip *chip = get_irq_chip(virt_irq);
+
+ if (WARN_ON(chip == &sun4v_irq || chip == &sun4v_virq)) {
+ printk(KERN_ERR "IRQ: Trying to install pre-handler on "
+ "sun4v irq %u\n", virt_irq);
+ return;
+ }
data->pre_handler = func;
data->pre_handler_arg1 = arg1;
data->pre_handler_arg2 = arg2;
- chip = get_irq_chip(virt_irq);
- if (chip == &sun4u_irq_ack ||
- chip == &sun4v_irq_ack ||
- chip == &sun4v_virq_ack
-#ifdef CONFIG_PCI_MSI
- || chip == &sun4v_msi
-#endif
- )
+ if (chip == &sun4u_irq_ack)
return;
- chip = (chip == &sun4u_irq ?
- &sun4u_irq_ack :
- (chip == &sun4v_irq ?
- &sun4v_irq_ack : &sun4v_virq_ack));
- set_irq_chip(virt_irq, chip);
+ set_irq_chip(virt_irq, &sun4u_irq_ack);
}
unsigned int build_irq(int inofixup, unsigned long iclr, unsigned long imap)
{
struct ino_bucket *bucket;
struct irq_handler_data *data;
+ unsigned int virt_irq;
int ino;
BUG_ON(tlb_type == hypervisor);
ino = (upa_readq(imap) & (IMAP_IGN | IMAP_INO)) + inofixup;
bucket = &ivector_table[ino];
- if (!bucket->virt_irq) {
- bucket->virt_irq = virt_irq_alloc(__irq(bucket));
- set_irq_chip(bucket->virt_irq, &sun4u_irq);
+ virt_irq = bucket_get_virt_irq(__pa(bucket));
+ if (!virt_irq) {
+ virt_irq = virt_irq_alloc(0, ino);
+ bucket_set_virt_irq(__pa(bucket), virt_irq);
+ set_irq_chip(virt_irq, &sun4u_irq);
}
- data = get_irq_chip_data(bucket->virt_irq);
+ data = get_irq_chip_data(virt_irq);
if (unlikely(data))
goto out;
prom_printf("IRQ: kzalloc(irq_handler_data) failed.\n");
prom_halt();
}
- set_irq_chip_data(bucket->virt_irq, data);
+ set_irq_chip_data(virt_irq, data);
data->imap = imap;
data->iclr = iclr;
out:
- return bucket->virt_irq;
+ return virt_irq;
}
static unsigned int sun4v_build_common(unsigned long sysino,
{
struct ino_bucket *bucket;
struct irq_handler_data *data;
+ unsigned int virt_irq;
BUG_ON(tlb_type != hypervisor);
bucket = &ivector_table[sysino];
- if (!bucket->virt_irq) {
- bucket->virt_irq = virt_irq_alloc(__irq(bucket));
- set_irq_chip(bucket->virt_irq, chip);
+ virt_irq = bucket_get_virt_irq(__pa(bucket));
+ if (!virt_irq) {
+ virt_irq = virt_irq_alloc(0, sysino);
+ bucket_set_virt_irq(__pa(bucket), virt_irq);
+ set_irq_chip(virt_irq, chip);
}
- data = get_irq_chip_data(bucket->virt_irq);
+ data = get_irq_chip_data(virt_irq);
if (unlikely(data))
goto out;
prom_printf("IRQ: kzalloc(irq_handler_data) failed.\n");
prom_halt();
}
- set_irq_chip_data(bucket->virt_irq, data);
+ set_irq_chip_data(virt_irq, data);
/* Catch accidental accesses to these things. IMAP/ICLR handling
* is done by hypervisor calls on sun4v platforms, not by direct
data->iclr = ~0UL;
out:
- return bucket->virt_irq;
+ return virt_irq;
}
unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino)
unsigned int sun4v_build_virq(u32 devhandle, unsigned int devino)
{
- unsigned long sysino, hv_err;
- unsigned int virq;
-
- BUG_ON(devhandle & devino);
-
- sysino = devhandle | devino;
- BUG_ON(sysino & ~(IMAP_IGN | IMAP_INO));
-
- hv_err = sun4v_vintr_set_cookie(devhandle, devino, sysino);
- if (hv_err) {
- prom_printf("IRQ: Fatal, cannot set cookie for [%x:%x] "
- "err=%lu\n", devhandle, devino, hv_err);
- prom_halt();
- }
-
- virq = sun4v_build_common(sysino, &sun4v_virq);
-
- virt_to_real_irq_table[virq].dev_handle = devhandle;
- virt_to_real_irq_table[virq].dev_ino = devino;
-
- return virq;
-}
-
-#ifdef CONFIG_PCI_MSI
-unsigned int sun4v_build_msi(u32 devhandle, unsigned int *virt_irq_p,
- unsigned int msi_start, unsigned int msi_end)
-{
- struct ino_bucket *bucket;
struct irq_handler_data *data;
- unsigned long sysino;
- unsigned int devino;
-
- BUG_ON(tlb_type != hypervisor);
+ struct ino_bucket *bucket;
+ unsigned long hv_err, cookie;
+ unsigned int virt_irq;
- /* Find a free devino in the given range. */
- for (devino = msi_start; devino < msi_end; devino++) {
- sysino = sun4v_devino_to_sysino(devhandle, devino);
- bucket = &ivector_table[sysino];
- if (!bucket->virt_irq)
- break;
- }
- if (devino >= msi_end)
+ bucket = kzalloc(sizeof(struct ino_bucket), GFP_ATOMIC);
+ if (unlikely(!bucket))
return 0;
+ __flush_dcache_range((unsigned long) bucket,
+ ((unsigned long) bucket +
+ sizeof(struct ino_bucket)));
- sysino = sun4v_devino_to_sysino(devhandle, devino);
- bucket = &ivector_table[sysino];
- bucket->virt_irq = virt_irq_alloc(__irq(bucket));
- *virt_irq_p = bucket->virt_irq;
- set_irq_chip(bucket->virt_irq, &sun4v_msi);
-
- data = get_irq_chip_data(bucket->virt_irq);
- if (unlikely(data))
- return devino;
+ virt_irq = virt_irq_alloc(devhandle, devino);
+ bucket_set_virt_irq(__pa(bucket), virt_irq);
+ set_irq_chip(virt_irq, &sun4v_virq);
data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC);
- if (unlikely(!data)) {
- prom_printf("IRQ: kzalloc(irq_handler_data) failed.\n");
- prom_halt();
- }
- set_irq_chip_data(bucket->virt_irq, data);
+ if (unlikely(!data))
+ return 0;
+ set_irq_chip_data(virt_irq, data);
+
+ /* Catch accidental accesses to these things. IMAP/ICLR handling
+ * is done by hypervisor calls on sun4v platforms, not by direct
+ * register accesses.
+ */
data->imap = ~0UL;
data->iclr = ~0UL;
- return devino;
-}
+ 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();
+ }
-void sun4v_destroy_msi(unsigned int virt_irq)
-{
- virt_irq_free(virt_irq);
+ return virt_irq;
}
-#endif
void ack_bad_irq(unsigned int virt_irq)
{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
- unsigned int ino = 0xdeadbeef;
+ unsigned int ino = virt_irq_table[virt_irq].dev_ino;
- if (bucket)
- ino = bucket - &ivector_table[0];
+ if (!ino)
+ ino = 0xdeadbeef;
printk(KERN_CRIT "Unexpected IRQ from ino[%x] virt_irq[%u]\n",
ino, virt_irq);
void handler_irq(int irq, struct pt_regs *regs)
{
- struct ino_bucket *bucket;
+ unsigned long pstate, bucket_pa;
struct pt_regs *old_regs;
clear_softint(1 << irq);
old_regs = set_irq_regs(regs);
irq_enter();
- /* Sliiiick... */
- bucket = __bucket(xchg32(irq_work(smp_processor_id()), 0));
- while (bucket) {
- struct ino_bucket *next = __bucket(bucket->irq_chain);
+ /* Grab an atomic snapshot of the pending IVECs. */
+ __asm__ __volatile__("rdpr %%pstate, %0\n\t"
+ "wrpr %0, %3, %%pstate\n\t"
+ "ldx [%2], %1\n\t"
+ "stx %%g0, [%2]\n\t"
+ "wrpr %0, 0x0, %%pstate\n\t"
+ : "=&r" (pstate), "=&r" (bucket_pa)
+ : "r" (irq_work_pa(smp_processor_id())),
+ "i" (PSTATE_IE)
+ : "memory");
+
+ while (bucket_pa) {
+ unsigned long next_pa;
+ unsigned int virt_irq;
- bucket->irq_chain = 0;
- __do_IRQ(bucket->virt_irq);
+ next_pa = bucket_get_chain_pa(bucket_pa);
+ virt_irq = bucket_get_virt_irq(bucket_pa);
+ bucket_clear_chain_pa(bucket_pa);
- bucket = next;
+ __do_IRQ(virt_irq);
+
+ bucket_pa = next_pa;
}
irq_exit();
{
int cpu = hard_smp_processor_id();
- trap_block[cpu].irq_worklist = 0;
+ trap_block[cpu].irq_worklist_pa = 0UL;
}
/* Please be very careful with register_one_mondo() and
/* Only invoked on boot processor. */
void __init init_IRQ(void)
{
+ unsigned long size;
+
map_prom_timers();
kill_prom_timer();
- memset(&ivector_table[0], 0, sizeof(ivector_table));
+
+ size = sizeof(struct ino_bucket) * NUM_IVECS;
+ ivector_table = alloc_bootmem_low(size);
+ if (!ivector_table) {
+ prom_printf("Fatal error, cannot allocate ivector_table\n");
+ prom_halt();
+ }
+ __flush_dcache_range((unsigned long) ivector_table,
+ ((unsigned long) ivector_table) + size);
+
+ ivector_table_pa = __pa(ivector_table);
if (tlb_type == hypervisor)
sun4v_init_mondo_queues();
projects / linux-2.6-omap-h63xx.git / blobdiff