Merge branch 'merge'

2 files changed, 106 insertions, 108 deletions

diff --git a/arch/powerpc/sysdev/i8259.c b/arch/powerpc/sysdev/i8259.c
index 72c73a6105cd..9855820b9548 100644
--- a/arch/powerpc/sysdev/i8259.c
+++ b/arch/powerpc/sysdev/i8259.c
@@ -169,7 +169,7 @@ static int i8259_host_match(struct irq_host *h, struct device_node *node)
 }
 
 static int i8259_host_map(struct irq_host *h, unsigned int virq,
-                          irq_hw_number_t hw, unsigned int flags)
+                          irq_hw_number_t hw)
 {
         pr_debug("i8259_host_map(%d, 0x%lx)\n", virq, hw);
 
@@ -177,7 +177,7 @@ static int i8259_host_map(struct irq_host *h, unsigned int virq,
         if (hw == 2)
                 get_irq_desc(virq)->status |= IRQ_NOREQUEST;
 
-        /* We use the level stuff only for now, we might want to
+        /* We use the level handler only for now, we might want to
          * be more cautious here but that works for now
          */
         get_irq_desc(virq)->status |= IRQ_LEVEL;
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 9cecebaa0360..6e0281afa6c3 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -204,7 +204,7 @@ static void mpic_startup_ht_interrupt(struct mpic *mpic, unsigned int source,
         if (fixup->base == NULL)
                 return;
 
-        DBG("startup_ht_interrupt(%u, %u) index: %d\n",
+        DBG("startup_ht_interrupt(0x%x, 0x%x) index: %d\n",
             source, irqflags, fixup->index);
         spin_lock_irqsave(&mpic->fixup_lock, flags);
         /* Enable and configure */
@@ -227,7 +227,7 @@ static void mpic_shutdown_ht_interrupt(struct mpic *mpic, unsigned int source,
         if (fixup->base == NULL)
                 return;
 
-        DBG("shutdown_ht_interrupt(%u, %u)\n", source, irqflags);
+        DBG("shutdown_ht_interrupt(0x%x, 0x%x)\n", source, irqflags);
 
         /* Disable */
         spin_lock_irqsave(&mpic->fixup_lock, flags);
@@ -337,6 +337,17 @@ static void __init mpic_scan_ht_pics(struct mpic *mpic)
         }
 }
 
+#else /* CONFIG_MPIC_BROKEN_U3 */
+
+static inline int mpic_is_ht_interrupt(struct mpic *mpic, unsigned int source)
+{
+        return 0;
+}
+
+static void __init mpic_scan_ht_pics(struct mpic *mpic)
+{
+}
+
 #endif /* CONFIG_MPIC_BROKEN_U3 */
 
 
@@ -405,11 +416,9 @@ static void mpic_unmask_irq(unsigned int irq)
         unsigned int loops = 100000;
         struct mpic *mpic = mpic_from_irq(irq);
         unsigned int src = mpic_irq_to_hw(irq);
-        unsigned long flags;
 
         DBG("%p: %s: enable_irq: %d (src %d)\n", mpic, mpic->name, irq, src);
 
-        spin_lock_irqsave(&mpic_lock, flags);
         mpic_irq_write(src, MPIC_IRQ_VECTOR_PRI,
                        mpic_irq_read(src, MPIC_IRQ_VECTOR_PRI) &
                        ~MPIC_VECPRI_MASK);
@@ -420,7 +429,6 @@ static void mpic_unmask_irq(unsigned int irq)
                         break;
                 }
         } while(mpic_irq_read(src, MPIC_IRQ_VECTOR_PRI) & MPIC_VECPRI_MASK);
-        spin_unlock_irqrestore(&mpic_lock, flags);
 }
 
 static void mpic_mask_irq(unsigned int irq)
@@ -428,11 +436,9 @@ static void mpic_mask_irq(unsigned int irq)
         unsigned int loops = 100000;
         struct mpic *mpic = mpic_from_irq(irq);
         unsigned int src = mpic_irq_to_hw(irq);
-        unsigned long flags;
 
         DBG("%s: disable_irq: %d (src %d)\n", mpic->name, irq, src);
 
-        spin_lock_irqsave(&mpic_lock, flags);
         mpic_irq_write(src, MPIC_IRQ_VECTOR_PRI,
                        mpic_irq_read(src, MPIC_IRQ_VECTOR_PRI) |
                        MPIC_VECPRI_MASK);
@@ -444,7 +450,6 @@ static void mpic_mask_irq(unsigned int irq)
                         break;
                 }
         } while(!(mpic_irq_read(src, MPIC_IRQ_VECTOR_PRI) & MPIC_VECPRI_MASK));
-        spin_unlock_irqrestore(&mpic_lock, flags);
 }
 
 static void mpic_end_irq(unsigned int irq)
@@ -512,8 +517,7 @@ static void mpic_end_ht_irq(unsigned int irq)
                 mpic_ht_end_irq(mpic, src);
         mpic_eoi(mpic);
 }
-
-#endif /* CONFIG_MPIC_BROKEN_U3 */
+#endif /* !CONFIG_MPIC_BROKEN_U3 */
 
 #ifdef CONFIG_SMP
 
@@ -560,47 +564,74 @@ static void mpic_set_affinity(unsigned int irq, cpumask_t cpumask)
                        mpic_physmask(cpus_addr(tmp)[0]));       
 }
 
-static unsigned int mpic_flags_to_vecpri(unsigned int flags, int *level)
+static unsigned int mpic_type_to_vecpri(unsigned int type)
 {
-        unsigned int vecpri;
-
         /* Now convert sense value */
-        switch(flags & IRQ_TYPE_SENSE_MASK) {
+        switch(type & IRQ_TYPE_SENSE_MASK) {
         case IRQ_TYPE_EDGE_RISING:
-                vecpri = MPIC_VECPRI_SENSE_EDGE |
-                        MPIC_VECPRI_POLARITY_POSITIVE;
-                *level = 0;
-                break;
+                return MPIC_VECPRI_SENSE_EDGE | MPIC_VECPRI_POLARITY_POSITIVE;
         case IRQ_TYPE_EDGE_FALLING:
-                vecpri = MPIC_VECPRI_SENSE_EDGE |
-                        MPIC_VECPRI_POLARITY_NEGATIVE;
-                *level = 0;
-                break;
+        case IRQ_TYPE_EDGE_BOTH:
+                return MPIC_VECPRI_SENSE_EDGE | MPIC_VECPRI_POLARITY_NEGATIVE;
         case IRQ_TYPE_LEVEL_HIGH:
-                vecpri = MPIC_VECPRI_SENSE_LEVEL |
-                        MPIC_VECPRI_POLARITY_POSITIVE;
-                *level = 1;
-                break;
+                return MPIC_VECPRI_SENSE_LEVEL | MPIC_VECPRI_POLARITY_POSITIVE;
         case IRQ_TYPE_LEVEL_LOW:
         default:
-                vecpri = MPIC_VECPRI_SENSE_LEVEL |
-                        MPIC_VECPRI_POLARITY_NEGATIVE;
-                *level = 1;
+                return MPIC_VECPRI_SENSE_LEVEL | MPIC_VECPRI_POLARITY_NEGATIVE;
         }
-        return vecpri;
+}
+
+static int mpic_set_irq_type(unsigned int virq, unsigned int flow_type)
+{
+        struct mpic *mpic = mpic_from_irq(virq);
+        unsigned int src = mpic_irq_to_hw(virq);
+        struct irq_desc *desc = get_irq_desc(virq);
+        unsigned int vecpri, vold, vnew;
+
+        DBG("mpic: set_irq_type(mpic:@%p,virq:%d,src:0x%x,type:0x%x)\n",
+            mpic, virq, src, flow_type);
+
+        if (src >= mpic->irq_count)
+                return -EINVAL;
+
+        if (flow_type == IRQ_TYPE_NONE)
+                if (mpic->senses && src < mpic->senses_count)
+                        flow_type = mpic->senses[src];
+        if (flow_type == IRQ_TYPE_NONE)
+                flow_type = IRQ_TYPE_LEVEL_LOW;
+
+        desc->status &= ~(IRQ_TYPE_SENSE_MASK | IRQ_LEVEL);
+        desc->status |= flow_type & IRQ_TYPE_SENSE_MASK;
+        if (flow_type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW))
+                desc->status |= IRQ_LEVEL;
+
+        if (mpic_is_ht_interrupt(mpic, src))
+                vecpri = MPIC_VECPRI_POLARITY_POSITIVE |
+                        MPIC_VECPRI_SENSE_EDGE;
+        else
+                vecpri = mpic_type_to_vecpri(flow_type);
+
+        vold = mpic_irq_read(src, MPIC_IRQ_VECTOR_PRI);
+        vnew = vold & ~(MPIC_VECPRI_POLARITY_MASK | MPIC_VECPRI_SENSE_MASK);
+        vnew |= vecpri;
+        if (vold != vnew)
+                mpic_irq_write(src, MPIC_IRQ_VECTOR_PRI, vnew);
+
+        return 0;
 }
 
 static struct irq_chip mpic_irq_chip = {
-        .mask   = mpic_mask_irq,
-        .unmask = mpic_unmask_irq,
-        .eoi    = mpic_end_irq,
+        .mask           = mpic_mask_irq,
+        .unmask         = mpic_unmask_irq,
+        .eoi            = mpic_end_irq,
+        .set_type       = mpic_set_irq_type,
 };
 
 #ifdef CONFIG_SMP
 static struct irq_chip mpic_ipi_chip = {
-        .mask   = mpic_mask_ipi,
-        .unmask = mpic_unmask_ipi,
-        .eoi    = mpic_end_ipi,
+        .mask           = mpic_mask_ipi,
+        .unmask         = mpic_unmask_ipi,
+        .eoi            = mpic_end_ipi,
 };
 #endif /* CONFIG_SMP */
 
@@ -611,6 +642,7 @@ static struct irq_chip mpic_irq_ht_chip = {
         .mask           = mpic_mask_irq,
         .unmask         = mpic_unmask_ht_irq,
         .eoi            = mpic_end_ht_irq,
+        .set_type       = mpic_set_irq_type,
 };
 #endif /* CONFIG_MPIC_BROKEN_U3 */
 
@@ -624,26 +656,21 @@ static int mpic_host_match(struct irq_host *h, struct device_node *node)
 }
 
 static int mpic_host_map(struct irq_host *h, unsigned int virq,
-                         irq_hw_number_t hw, unsigned int flags)
+                         irq_hw_number_t hw)
 {
-        struct irq_desc *desc = get_irq_desc(virq);
-        struct irq_chip *chip;
         struct mpic *mpic = h->host_data;
-        u32 v, vecpri = MPIC_VECPRI_SENSE_LEVEL |
-                MPIC_VECPRI_POLARITY_NEGATIVE;
-        int level;
-        unsigned long iflags;
+        struct irq_chip *chip;
 
-        pr_debug("mpic: map virq %d, hwirq 0x%lx, flags: 0x%x\n",
-                 virq, hw, flags);
+        DBG("mpic: map virq %d, hwirq 0x%lx\n", virq, hw);
 
         if (hw == MPIC_VEC_SPURRIOUS)
                 return -EINVAL;
+
 #ifdef CONFIG_SMP
         else if (hw >= MPIC_VEC_IPI_0) {
                 WARN_ON(!(mpic->flags & MPIC_PRIMARY));
 
-                pr_debug("mpic: mapping as IPI\n");
+                DBG("mpic: mapping as IPI\n");
                 set_irq_chip_data(virq, mpic);
                 set_irq_chip_and_handler(virq, &mpic->hc_ipi,
                                          handle_percpu_irq);
@@ -654,44 +681,23 @@ static int mpic_host_map(struct irq_host *h, unsigned int virq,
         if (hw >= mpic->irq_count)
                 return -EINVAL;
 
-        /* If no sense provided, check default sense array */
-        if (((flags & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_NONE) &&
-            mpic->senses && hw < mpic->senses_count)
-                flags |= mpic->senses[hw];
-
-        vecpri = mpic_flags_to_vecpri(flags, &level);
-        if (level)
-                desc->status |= IRQ_LEVEL;
+        /* Default chip */
         chip = &mpic->hc_irq;
 
 #ifdef CONFIG_MPIC_BROKEN_U3
         /* Check for HT interrupts, override vecpri */
-        if (mpic_is_ht_interrupt(mpic, hw)) {
-                vecpri &= ~(MPIC_VECPRI_SENSE_MASK |
-                            MPIC_VECPRI_POLARITY_MASK);
-                vecpri |= MPIC_VECPRI_POLARITY_POSITIVE;
+        if (mpic_is_ht_interrupt(mpic, hw))
                 chip = &mpic->hc_ht_irq;
-        }
-#endif
+#endif /* CONFIG_MPIC_BROKEN_U3 */
 
-        /* Reconfigure irq. We must preserve the mask bit as we can be called
-         * while the interrupt is still active (This may change in the future
-         * but for now, it is the case).
-         */
-        spin_lock_irqsave(&mpic_lock, iflags);
-        v = mpic_irq_read(hw, MPIC_IRQ_VECTOR_PRI);
-        vecpri = (v &
-                ~(MPIC_VECPRI_POLARITY_MASK | MPIC_VECPRI_SENSE_MASK)) |
-                vecpri;
-        if (vecpri != v)
-                mpic_irq_write(hw, MPIC_IRQ_VECTOR_PRI, vecpri);
-        spin_unlock_irqrestore(&mpic_lock, iflags);
-
-        pr_debug("mpic: mapping as IRQ, vecpri = 0x%08x (was 0x%08x)\n",
-                 vecpri, v);
+        DBG("mpic: mapping to irq chip @%p\n", chip);
 
         set_irq_chip_data(virq, mpic);
         set_irq_chip_and_handler(virq, chip, handle_fasteoi_irq);
+
+        /* Set default irq type */
+        set_irq_type(virq, IRQ_TYPE_NONE);
+
         return 0;
 }
 
@@ -708,11 +714,28 @@ static int mpic_host_xlate(struct irq_host *h, struct device_node *ct,
         };
 
         *out_hwirq = intspec[0];
-        if (intsize > 1 && intspec[1] < 4)
-                *out_flags = map_mpic_senses[intspec[1]];
-        else
+        if (intsize > 1) {
+                u32 mask = 0x3;
+
+                /* Apple invented a new race of encoding on machines with
+                 * an HT APIC. They encode, among others, the index within
+                 * the HT APIC. We don't care about it here since thankfully,
+                 * it appears that they have the APIC already properly
+                 * configured, and thus our current fixup code that reads the
+                 * APIC config works fine. However, we still need to mask out
+                 * bits in the specifier to make sure we only get bit 0 which
+                 * is the level/edge bit (the only sense bit exposed by Apple),
+                 * as their bit 1 means something else.
+                 */
+                if (machine_is(powermac))
+                        mask = 0x1;
+                *out_flags = map_mpic_senses[intspec[1] & mask];
+        } else
                 *out_flags = IRQ_TYPE_NONE;
 
+        DBG("mpic: xlate (%d cells: 0x%08x 0x%08x) to line 0x%lx sense 0x%x\n",
+            intsize, intspec[0], intspec[1], *out_hwirq, *out_flags);
+
         return 0;
 }
 
@@ -906,41 +929,16 @@ void __init mpic_init(struct mpic *mpic)
         if (mpic->irq_count == 0)
                 mpic->irq_count = mpic->num_sources;
 
-#ifdef CONFIG_MPIC_BROKEN_U3
         /* Do the HT PIC fixups on U3 broken mpic */
         DBG("MPIC flags: %x\n", mpic->flags);
         if ((mpic->flags & MPIC_BROKEN_U3) && (mpic->flags & MPIC_PRIMARY))
                 mpic_scan_ht_pics(mpic);
-#endif /* CONFIG_MPIC_BROKEN_U3 */
 
         for (i = 0; i < mpic->num_sources; i++) {
                 /* start with vector = source number, and masked */
-                u32 vecpri = MPIC_VECPRI_MASK | i | (8 << MPIC_VECPRI_PRIORITY_SHIFT);
-                int level = 1;
+                u32 vecpri = MPIC_VECPRI_MASK | i |
+                        (8 << MPIC_VECPRI_PRIORITY_SHIFT);
                 
-                /* do senses munging */
-                if (mpic->senses && i < mpic->senses_count)
-                        vecpri |= mpic_flags_to_vecpri(mpic->senses[i],
-                                                       &level);
-                else
-                        vecpri |= MPIC_VECPRI_SENSE_LEVEL;
-
-                /* deal with broken U3 */
-                if (mpic->flags & MPIC_BROKEN_U3) {
-#ifdef CONFIG_MPIC_BROKEN_U3
-                        if (mpic_is_ht_interrupt(mpic, i)) {
-                                vecpri &= ~(MPIC_VECPRI_SENSE_MASK |
-                                            MPIC_VECPRI_POLARITY_MASK);
-                                vecpri |= MPIC_VECPRI_POLARITY_POSITIVE;
-                        }
-#else
-                        printk(KERN_ERR "mpic: BROKEN_U3 set, but CONFIG doesn't match\n");
-#endif
-                }
-
-                DBG("setup source %d, vecpri: %08x, level: %d\n", i, vecpri,
-                    (level != 0));
-
                 /* init hw */
                 mpic_irq_write(i, MPIC_IRQ_VECTOR_PRI, vecpri);
                 mpic_irq_write(i, MPIC_IRQ_DESTINATION,
@@ -1154,7 +1152,7 @@ void mpic_request_ipis(void)
 
         for (i = 0; i < 4; i++) {
                 unsigned int vipi = irq_create_mapping(mpic->irqhost,
-                                                       MPIC_VEC_IPI_0 + i, 0);
+                                                       MPIC_VEC_IPI_0 + i);
                 if (vipi == NO_IRQ) {
                         printk(KERN_ERR "Failed to map IPI %d\n", i);
                         break;