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Diffstat (limited to 'arch/sparc64/kernel/irq.c')
-rw-r--r--arch/sparc64/kernel/irq.c339
1 files changed, 252 insertions, 87 deletions
diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c
index 233526ba3abe..8c93ba655b33 100644
--- a/arch/sparc64/kernel/irq.c
+++ b/arch/sparc64/kernel/irq.c
@@ -21,6 +21,7 @@
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
+#include <linux/bootmem.h>
#include <asm/ptrace.h>
#include <asm/processor.h>
@@ -39,6 +40,7 @@
#include <asm/cache.h>
#include <asm/cpudata.h>
#include <asm/auxio.h>
+#include <asm/head.h>
#ifdef CONFIG_SMP
static void distribute_irqs(void);
@@ -136,12 +138,48 @@ out_unlock:
return 0;
}
+extern unsigned long real_hard_smp_processor_id(void);
+
+static unsigned int sun4u_compute_tid(unsigned long imap, unsigned long cpuid)
+{
+ unsigned int tid;
+
+ if (this_is_starfire) {
+ tid = starfire_translate(imap, cpuid);
+ tid <<= IMAP_TID_SHIFT;
+ tid &= IMAP_TID_UPA;
+ } else {
+ if (tlb_type == cheetah || tlb_type == cheetah_plus) {
+ unsigned long ver;
+
+ __asm__ ("rdpr %%ver, %0" : "=r" (ver));
+ if ((ver >> 32UL) == __JALAPENO_ID ||
+ (ver >> 32UL) == __SERRANO_ID) {
+ tid = cpuid << IMAP_TID_SHIFT;
+ tid &= IMAP_TID_JBUS;
+ } else {
+ unsigned int a = cpuid & 0x1f;
+ unsigned int n = (cpuid >> 5) & 0x1f;
+
+ tid = ((a << IMAP_AID_SHIFT) |
+ (n << IMAP_NID_SHIFT));
+ tid &= (IMAP_AID_SAFARI |
+ IMAP_NID_SAFARI);;
+ }
+ } else {
+ tid = cpuid << IMAP_TID_SHIFT;
+ tid &= IMAP_TID_UPA;
+ }
+ }
+
+ return tid;
+}
+
/* Now these are always passed a true fully specified sun4u INO. */
void enable_irq(unsigned int irq)
{
struct ino_bucket *bucket = __bucket(irq);
- unsigned long imap;
- unsigned long tid;
+ unsigned long imap, cpuid;
imap = bucket->imap;
if (imap == 0UL)
@@ -149,47 +187,38 @@ void enable_irq(unsigned int irq)
preempt_disable();
- if (tlb_type == cheetah || tlb_type == cheetah_plus) {
- unsigned long ver;
-
- __asm__ ("rdpr %%ver, %0" : "=r" (ver));
- if ((ver >> 32) == 0x003e0016) {
- /* We set it to our JBUS ID. */
- __asm__ __volatile__("ldxa [%%g0] %1, %0"
- : "=r" (tid)
- : "i" (ASI_JBUS_CONFIG));
- tid = ((tid & (0x1fUL<<17)) << 9);
- tid &= IMAP_TID_JBUS;
- } else {
- /* We set it to our Safari AID. */
- __asm__ __volatile__("ldxa [%%g0] %1, %0"
- : "=r" (tid)
- : "i" (ASI_SAFARI_CONFIG));
- tid = ((tid & (0x3ffUL<<17)) << 9);
- tid &= IMAP_AID_SAFARI;
- }
- } else if (this_is_starfire == 0) {
- /* We set it to our UPA MID. */
- __asm__ __volatile__("ldxa [%%g0] %1, %0"
- : "=r" (tid)
- : "i" (ASI_UPA_CONFIG));
- tid = ((tid & UPA_CONFIG_MID) << 9);
- tid &= IMAP_TID_UPA;
+ /* This gets the physical processor ID, even on uniprocessor,
+ * so we can always program the interrupt target correctly.
+ */
+ cpuid = real_hard_smp_processor_id();
+
+ if (tlb_type == hypervisor) {
+ unsigned int ino = __irq_ino(irq);
+ int err;
+
+ err = sun4v_intr_settarget(ino, cpuid);
+ if (err != HV_EOK)
+ printk("sun4v_intr_settarget(%x,%lu): err(%d)\n",
+ ino, cpuid, err);
+ err = sun4v_intr_setenabled(ino, HV_INTR_ENABLED);
+ if (err != HV_EOK)
+ printk("sun4v_intr_setenabled(%x): err(%d)\n",
+ ino, err);
} else {
- tid = (starfire_translate(imap, smp_processor_id()) << 26);
- tid &= IMAP_TID_UPA;
+ unsigned int tid = sun4u_compute_tid(imap, cpuid);
+
+ /* NOTE NOTE NOTE, IGN and INO are read-only, IGN is a product
+ * of this SYSIO's preconfigured IGN in the SYSIO Control
+ * Register, the hardware just mirrors that value here.
+ * However for Graphics and UPA Slave devices the full
+ * IMAP_INR field can be set by the programmer here.
+ *
+ * Things like FFB can now be handled via the new IRQ
+ * mechanism.
+ */
+ upa_writel(tid | IMAP_VALID, imap);
}
- /* NOTE NOTE NOTE, IGN and INO are read-only, IGN is a product
- * of this SYSIO's preconfigured IGN in the SYSIO Control
- * Register, the hardware just mirrors that value here.
- * However for Graphics and UPA Slave devices the full
- * IMAP_INR field can be set by the programmer here.
- *
- * Things like FFB can now be handled via the new IRQ mechanism.
- */
- upa_writel(tid | IMAP_VALID, imap);
-
preempt_enable();
}
@@ -201,16 +230,26 @@ void disable_irq(unsigned int irq)
imap = bucket->imap;
if (imap != 0UL) {
- u32 tmp;
+ if (tlb_type == hypervisor) {
+ unsigned int ino = __irq_ino(irq);
+ int err;
+
+ err = sun4v_intr_setenabled(ino, HV_INTR_DISABLED);
+ if (err != HV_EOK)
+ printk("sun4v_intr_setenabled(%x): "
+ "err(%d)\n", ino, err);
+ } else {
+ u32 tmp;
- /* NOTE: We do not want to futz with the IRQ clear registers
- * and move the state to IDLE, the SCSI code does call
- * disable_irq() to assure atomicity in the queue cmd
- * SCSI adapter driver code. Thus we'd lose interrupts.
- */
- tmp = upa_readl(imap);
- tmp &= ~IMAP_VALID;
- upa_writel(tmp, imap);
+ /* NOTE: We do not want to futz with the IRQ clear registers
+ * and move the state to IDLE, the SCSI code does call
+ * disable_irq() to assure atomicity in the queue cmd
+ * SCSI adapter driver code. Thus we'd lose interrupts.
+ */
+ tmp = upa_readl(imap);
+ tmp &= ~IMAP_VALID;
+ upa_writel(tmp, imap);
+ }
}
}
@@ -248,6 +287,8 @@ unsigned int build_irq(int pil, int inofixup, unsigned long iclr, unsigned long
return __irq(&pil0_dummy_bucket);
}
+ BUG_ON(tlb_type == hypervisor);
+
/* RULE: Both must be specified in all other cases. */
if (iclr == 0UL || imap == 0UL) {
prom_printf("Invalid build_irq %d %d %016lx %016lx\n",
@@ -275,12 +316,11 @@ unsigned int build_irq(int pil, int inofixup, unsigned long iclr, unsigned long
goto out;
}
- bucket->irq_info = kmalloc(sizeof(struct irq_desc), GFP_ATOMIC);
+ bucket->irq_info = kzalloc(sizeof(struct irq_desc), GFP_ATOMIC);
if (!bucket->irq_info) {
prom_printf("IRQ: Error, kmalloc(irq_desc) failed.\n");
prom_halt();
}
- memset(bucket->irq_info, 0, sizeof(struct irq_desc));
/* Ok, looks good, set it up. Don't touch the irq_chain or
* the pending flag.
@@ -294,6 +334,37 @@ out:
return __irq(bucket);
}
+unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino, int pil, unsigned char flags)
+{
+ struct ino_bucket *bucket;
+ unsigned long sysino;
+
+ sysino = sun4v_devino_to_sysino(devhandle, devino);
+
+ bucket = &ivector_table[sysino];
+
+ /* Catch accidental accesses to these things. IMAP/ICLR handling
+ * is done by hypervisor calls on sun4v platforms, not by direct
+ * register accesses.
+ *
+ * But we need to make them look unique for the disable_irq() logic
+ * in free_irq().
+ */
+ bucket->imap = ~0UL - sysino;
+ bucket->iclr = ~0UL - sysino;
+
+ bucket->pil = pil;
+ bucket->flags = flags;
+
+ bucket->irq_info = kzalloc(sizeof(struct irq_desc), GFP_ATOMIC);
+ if (!bucket->irq_info) {
+ prom_printf("IRQ: Error, kmalloc(irq_desc) failed.\n");
+ prom_halt();
+ }
+
+ return __irq(bucket);
+}
+
static void atomic_bucket_insert(struct ino_bucket *bucket)
{
unsigned long pstate;
@@ -482,7 +553,6 @@ void free_irq(unsigned int irq, void *dev_id)
bucket = __bucket(irq);
if (bucket != &pil0_dummy_bucket) {
struct irq_desc *desc = bucket->irq_info;
- unsigned long imap = bucket->imap;
int ent, i;
for (i = 0; i < MAX_IRQ_DESC_ACTION; i++) {
@@ -495,6 +565,8 @@ void free_irq(unsigned int irq, void *dev_id)
}
if (!desc->action_active_mask) {
+ unsigned long imap = bucket->imap;
+
/* This unique interrupt source is now inactive. */
bucket->flags &= ~IBF_ACTIVE;
@@ -592,7 +664,18 @@ static void process_bucket(int irq, struct ino_bucket *bp, struct pt_regs *regs)
break;
}
if (bp->pil != 0) {
- upa_writel(ICLR_IDLE, bp->iclr);
+ if (tlb_type == hypervisor) {
+ unsigned int ino = __irq_ino(bp);
+ int err;
+
+ err = sun4v_intr_setstate(ino, HV_INTR_STATE_IDLE);
+ if (err != HV_EOK)
+ printk("sun4v_intr_setstate(%x): "
+ "err(%d)\n", ino, err);
+ } else {
+ upa_writel(ICLR_IDLE, bp->iclr);
+ }
+
/* Test and add entropy */
if (random & SA_SAMPLE_RANDOM)
add_interrupt_randomness(irq);
@@ -694,7 +777,7 @@ irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie, struct pt_regs *regs)
val = readb(auxio_register);
val |= AUXIO_AUX1_FTCNT;
writeb(val, auxio_register);
- val &= AUXIO_AUX1_FTCNT;
+ val &= ~AUXIO_AUX1_FTCNT;
writeb(val, auxio_register);
doing_pdma = 0;
@@ -727,25 +810,23 @@ EXPORT_SYMBOL(probe_irq_off);
static int retarget_one_irq(struct irqaction *p, int goal_cpu)
{
struct ino_bucket *bucket = get_ino_in_irqaction(p) + ivector_table;
- unsigned long imap = bucket->imap;
- unsigned int tid;
while (!cpu_online(goal_cpu)) {
if (++goal_cpu >= NR_CPUS)
goal_cpu = 0;
}
- if (tlb_type == cheetah || tlb_type == cheetah_plus) {
- tid = goal_cpu << 26;
- tid &= IMAP_AID_SAFARI;
- } else if (this_is_starfire == 0) {
- tid = goal_cpu << 26;
- tid &= IMAP_TID_UPA;
+ if (tlb_type == hypervisor) {
+ unsigned int ino = __irq_ino(bucket);
+
+ sun4v_intr_settarget(ino, goal_cpu);
+ sun4v_intr_setenabled(ino, HV_INTR_ENABLED);
} else {
- tid = (starfire_translate(imap, goal_cpu) << 26);
- tid &= IMAP_TID_UPA;
+ unsigned long imap = bucket->imap;
+ unsigned int tid = sun4u_compute_tid(imap, goal_cpu);
+
+ upa_writel(tid | IMAP_VALID, imap);
}
- upa_writel(tid | IMAP_VALID, imap);
do {
if (++goal_cpu >= NR_CPUS)
@@ -848,33 +929,114 @@ static void kill_prom_timer(void)
void init_irqwork_curcpu(void)
{
- register struct irq_work_struct *workp asm("o2");
- register unsigned long tmp asm("o3");
int cpu = hard_smp_processor_id();
- memset(__irq_work + cpu, 0, sizeof(*workp));
-
- /* Make sure we are called with PSTATE_IE disabled. */
- __asm__ __volatile__("rdpr %%pstate, %0\n\t"
- : "=r" (tmp));
- if (tmp & PSTATE_IE) {
- prom_printf("BUG: init_irqwork_curcpu() called with "
- "PSTATE_IE enabled, bailing.\n");
- __asm__ __volatile__("mov %%i7, %0\n\t"
- : "=r" (tmp));
- prom_printf("BUG: Called from %lx\n", tmp);
+ memset(__irq_work + cpu, 0, sizeof(struct irq_work_struct));
+}
+
+static void __cpuinit register_one_mondo(unsigned long paddr, unsigned long type)
+{
+ unsigned long num_entries = 128;
+ unsigned long status;
+
+ status = sun4v_cpu_qconf(type, paddr, num_entries);
+ if (status != HV_EOK) {
+ prom_printf("SUN4V: sun4v_cpu_qconf(%lu:%lx:%lu) failed, "
+ "err %lu\n", type, paddr, num_entries, status);
prom_halt();
}
+}
- /* Set interrupt globals. */
- workp = &__irq_work[cpu];
- __asm__ __volatile__(
- "rdpr %%pstate, %0\n\t"
- "wrpr %0, %1, %%pstate\n\t"
- "mov %2, %%g6\n\t"
- "wrpr %0, 0x0, %%pstate\n\t"
- : "=&r" (tmp)
- : "i" (PSTATE_IG), "r" (workp));
+static void __cpuinit sun4v_register_mondo_queues(int this_cpu)
+{
+ struct trap_per_cpu *tb = &trap_block[this_cpu];
+
+ register_one_mondo(tb->cpu_mondo_pa, HV_CPU_QUEUE_CPU_MONDO);
+ register_one_mondo(tb->dev_mondo_pa, HV_CPU_QUEUE_DEVICE_MONDO);
+ register_one_mondo(tb->resum_mondo_pa, HV_CPU_QUEUE_RES_ERROR);
+ register_one_mondo(tb->nonresum_mondo_pa, HV_CPU_QUEUE_NONRES_ERROR);
+}
+
+static void __cpuinit alloc_one_mondo(unsigned long *pa_ptr, int use_bootmem)
+{
+ void *page;
+
+ if (use_bootmem)
+ page = alloc_bootmem_low_pages(PAGE_SIZE);
+ else
+ page = (void *) get_zeroed_page(GFP_ATOMIC);
+
+ if (!page) {
+ prom_printf("SUN4V: Error, cannot allocate mondo queue.\n");
+ prom_halt();
+ }
+
+ *pa_ptr = __pa(page);
+}
+
+static void __cpuinit alloc_one_kbuf(unsigned long *pa_ptr, int use_bootmem)
+{
+ void *page;
+
+ if (use_bootmem)
+ page = alloc_bootmem_low_pages(PAGE_SIZE);
+ else
+ page = (void *) get_zeroed_page(GFP_ATOMIC);
+
+ if (!page) {
+ prom_printf("SUN4V: Error, cannot allocate kbuf page.\n");
+ prom_halt();
+ }
+
+ *pa_ptr = __pa(page);
+}
+
+static void __cpuinit init_cpu_send_mondo_info(struct trap_per_cpu *tb, int use_bootmem)
+{
+#ifdef CONFIG_SMP
+ void *page;
+
+ BUILD_BUG_ON((NR_CPUS * sizeof(u16)) > (PAGE_SIZE - 64));
+
+ if (use_bootmem)
+ page = alloc_bootmem_low_pages(PAGE_SIZE);
+ else
+ page = (void *) get_zeroed_page(GFP_ATOMIC);
+
+ if (!page) {
+ prom_printf("SUN4V: Error, cannot allocate cpu mondo page.\n");
+ prom_halt();
+ }
+
+ tb->cpu_mondo_block_pa = __pa(page);
+ tb->cpu_list_pa = __pa(page + 64);
+#endif
+}
+
+/* Allocate and register the mondo and error queues for this cpu. */
+void __cpuinit sun4v_init_mondo_queues(int use_bootmem, int cpu, int alloc, int load)
+{
+ struct trap_per_cpu *tb = &trap_block[cpu];
+
+ if (alloc) {
+ alloc_one_mondo(&tb->cpu_mondo_pa, use_bootmem);
+ alloc_one_mondo(&tb->dev_mondo_pa, use_bootmem);
+ alloc_one_mondo(&tb->resum_mondo_pa, use_bootmem);
+ alloc_one_kbuf(&tb->resum_kernel_buf_pa, use_bootmem);
+ alloc_one_mondo(&tb->nonresum_mondo_pa, use_bootmem);
+ alloc_one_kbuf(&tb->nonresum_kernel_buf_pa, use_bootmem);
+
+ init_cpu_send_mondo_info(tb, use_bootmem);
+ }
+
+ if (load) {
+ if (cpu != hard_smp_processor_id()) {
+ prom_printf("SUN4V: init mondo on cpu %d not %d\n",
+ cpu, hard_smp_processor_id());
+ prom_halt();
+ }
+ sun4v_register_mondo_queues(cpu);
+ }
}
/* Only invoked on boot processor. */
@@ -884,6 +1046,9 @@ void __init init_IRQ(void)
kill_prom_timer();
memset(&ivector_table[0], 0, sizeof(ivector_table));
+ if (tlb_type == hypervisor)
+ sun4v_init_mondo_queues(1, hard_smp_processor_id(), 1, 1);
+
/* We need to clear any IRQ's pending in the soft interrupt
* registers, a spurious one could be left around from the
* PROM timer which we just disabled.
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 23:59:03 +0000