Merge branch 'release-2.6.27' of git://git.kernel.org/pub/scm/linux/kernel/git/ak...

[pandora-kernel.git] / arch / sparc64 / kernel / irq.c

diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c
index 30431bd..c481673 100644 (file)
--- a/arch/sparc64/kernel/irq.c
+++ b/arch/sparc64/kernel/irq.c
@@ -1,6 +1,6 @@
 /* irq.c: UltraSparc IRQ handling/init/registry.
  *
- * Copyright (C) 1997, 2007  David S. Miller  (davem@davemloft.net)
+ * Copyright (C) 1997, 2007, 2008 David S. Miller (davem@davemloft.net)
  * Copyright (C) 1998  Eddie C. Dost    (ecd@skynet.be)
  * Copyright (C) 1998  Jakub Jelinek    (jj@ultra.linux.cz)
  */
@@ -44,27 +44,10 @@
 #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
- * delivered.  We must translate this into a non-vector IRQ so we can
- * set the softint on this cpu.
- *
- * 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.
- *
- * 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 {
-/*0x00*/unsigned long __irq_chain_pa;
-
-       /* Virtual interrupt number assigned to this INO.  */
-/*0x08*/unsigned int __virt_irq;
-/*0x0c*/unsigned int __pad;
-};
+#include "entry.h"
 
 #define NUM_IVECS      (IMAP_INR + 1)
+
 struct ino_bucket *ivector_table;
 unsigned long ivector_table_pa;
 
@@ -325,6 +308,7 @@ static void sun4u_irq_enable(unsigned int virt_irq)
                         IMAP_AID_SAFARI | IMAP_NID_SAFARI);
                val |= tid | IMAP_VALID;
                upa_writeq(val, imap);
+               upa_writeq(ICLR_IDLE, data->iclr);
        }
 }
 
@@ -522,7 +506,7 @@ static struct irq_chip sun4v_virq = {
        .set_affinity   = sun4v_virt_set_affinity,
 };
 
-static void fastcall pre_flow_handler(unsigned int virt_irq,
+static void pre_flow_handler(unsigned int virt_irq,
                                      struct irq_desc *desc)
 {
        struct irq_handler_data *data = get_irq_chip_data(virt_irq);
@@ -637,8 +621,9 @@ unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino)
 unsigned int sun4v_build_virq(u32 devhandle, unsigned int devino)
 {
        struct irq_handler_data *data;
-       struct ino_bucket *bucket;
        unsigned long hv_err, cookie;
+       struct ino_bucket *bucket;
+       struct irq_desc *desc;
        unsigned int virt_irq;
 
        bucket = kzalloc(sizeof(struct ino_bucket), GFP_ATOMIC);
@@ -659,6 +644,13 @@ unsigned int sun4v_build_virq(u32 devhandle, unsigned int devino)
        if (unlikely(!data))
                return 0;
 
+       /* In order to make the LDC channel startup sequence easier,
+        * especially wrt. locking, we do not let request_irq() enable
+        * the interrupt.
+        */
+       desc = irq_desc + virt_irq;
+       desc->status |= IRQ_NOAUTOEN;
+
        set_irq_chip_data(virt_irq, data);
 
        /* Catch accidental accesses to these things.  IMAP/ICLR handling