[ARM] iop13xx: msi support

Enable devices to signal interrupts via PCI memory cycles.

rev6:
* fix enable/disable typo, Michael Ellerman

rev5:
* fix up ack, enable, and disable for iop13xx_msi_chip

rev4:
* move smp compile fix to separate patch
* use dynamic_irq_init in create_irq()
* hookup mask/unmask routines in iop13xx_msi_chip

rev3:
* change msi.c to use linux/smp.h instead of asm/smp.h
* call dynamic_irq_cleanup at destroy_irq time

rev2:
* destroy_irq did not take the full 128 bits of msi_irq_in_use into account
* added missing '&' for calls to test_and_set_bit and clear_bit

[ebiederm@xmission.com: review comments/suggestions]
[dan.j.williams@intel.com: cleanups/forward port to 2.6-git]
Signed-off-by: Daniel Wolstenholme <daniel.e.wolstenholme@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 11 insertions, 0 deletions

diff --git a/include/asm-arm/arch-iop13xx/msi.h b/include/asm-arm/arch-iop13xx/msi.h
new file mode 100644
index 000000000000..b80c5ae17e99
--- /dev/null
+++ b/include/asm-arm/arch-iop13xx/msi.h
@@ -0,0 +1,11 @@
+#ifndef _IOP13XX_MSI_H_
+#define _IOP13XX_MSI_H_
+#ifdef CONFIG_PCI_MSI
+void iop13xx_msi_init(void);
+#else
+static inline void iop13xx_msi_init(void)
+{
+        return;
+}
+#endif
+#endif