[PATCH] PCI: msi abstractions and support for altix
Abstract portions of the MSI core for platforms that do not use standard
APIC interrupt controllers. This is implemented through a new arch-specific
msi setup routine, and a set of msi ops which can be set on a per platform
basis.
Signed-off-by: Mark Maule <maule@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/include/asm-i386/msi.h b/include/asm-i386/msi.h
index f041d44..ed10142 100644
--- a/include/asm-i386/msi.h
+++ b/include/asm-i386/msi.h
@@ -12,4 +12,12 @@
#define LAST_DEVICE_VECTOR 232
#define MSI_TARGET_CPU_SHIFT 12
+extern struct msi_ops msi_apic_ops;
+
+static inline int msi_arch_init(void)
+{
+ msi_register(&msi_apic_ops);
+ return 0;
+}
+
#endif /* ASM_MSI_H */
diff --git a/include/asm-ia64/machvec.h b/include/asm-ia64/machvec.h
index 0df72a1..15b545a 100644
--- a/include/asm-ia64/machvec.h
+++ b/include/asm-ia64/machvec.h
@@ -75,6 +75,7 @@
typedef unsigned short ia64_mv_readw_relaxed_t (const volatile void __iomem *);
typedef unsigned int ia64_mv_readl_relaxed_t (const volatile void __iomem *);
typedef unsigned long ia64_mv_readq_relaxed_t (const volatile void __iomem *);
+typedef int ia64_mv_msi_init_t (void);
static inline void
machvec_noop (void)
@@ -153,6 +154,7 @@
# define platform_readl_relaxed ia64_mv.readl_relaxed
# define platform_readq_relaxed ia64_mv.readq_relaxed
# define platform_migrate ia64_mv.migrate
+# define platform_msi_init ia64_mv.msi_init
# endif
/* __attribute__((__aligned__(16))) is required to make size of the
@@ -202,6 +204,7 @@
ia64_mv_readl_relaxed_t *readl_relaxed;
ia64_mv_readq_relaxed_t *readq_relaxed;
ia64_mv_migrate_t *migrate;
+ ia64_mv_msi_init_t *msi_init;
} __attribute__((__aligned__(16))); /* align attrib? see above comment */
#define MACHVEC_INIT(name) \
@@ -247,6 +250,7 @@
platform_readl_relaxed, \
platform_readq_relaxed, \
platform_migrate, \
+ platform_msi_init, \
}
extern struct ia64_machine_vector ia64_mv;
@@ -400,5 +404,8 @@
#ifndef platform_migrate
# define platform_migrate machvec_noop_task
#endif
+#ifndef platform_msi_init
+# define platform_msi_init ((ia64_mv_msi_init_t*)NULL)
+#endif
#endif /* _ASM_IA64_MACHVEC_H */
diff --git a/include/asm-ia64/machvec_sn2.h b/include/asm-ia64/machvec_sn2.h
index da1d437..cf724dc 100644
--- a/include/asm-ia64/machvec_sn2.h
+++ b/include/asm-ia64/machvec_sn2.h
@@ -67,6 +67,8 @@
extern ia64_mv_dma_mapping_error sn_dma_mapping_error;
extern ia64_mv_dma_supported sn_dma_supported;
extern ia64_mv_migrate_t sn_migrate;
+extern ia64_mv_msi_init_t sn_msi_init;
+
/*
* This stuff has dual use!
@@ -117,6 +119,11 @@
#define platform_dma_mapping_error sn_dma_mapping_error
#define platform_dma_supported sn_dma_supported
#define platform_migrate sn_migrate
+#ifdef CONFIG_PCI_MSI
+#define platform_msi_init sn_msi_init
+#else
+#define platform_msi_init ((ia64_mv_msi_init_t*)NULL)
+#endif
#include <asm/sn/io.h>
diff --git a/include/asm-ia64/msi.h b/include/asm-ia64/msi.h
index 97890f7..bb92b0d 100644
--- a/include/asm-ia64/msi.h
+++ b/include/asm-ia64/msi.h
@@ -14,4 +14,16 @@
#define ack_APIC_irq ia64_eoi
#define MSI_TARGET_CPU_SHIFT 4
+extern struct msi_ops msi_apic_ops;
+
+static inline int msi_arch_init(void)
+{
+ if (platform_msi_init)
+ return platform_msi_init();
+
+ /* default ops for most ia64 platforms */
+ msi_register(&msi_apic_ops);
+ return 0;
+}
+
#endif /* ASM_MSI_H */
diff --git a/include/asm-x86_64/msi.h b/include/asm-x86_64/msi.h
index 356e0e8..8d6d6bf 100644
--- a/include/asm-x86_64/msi.h
+++ b/include/asm-x86_64/msi.h
@@ -13,4 +13,12 @@
#define LAST_DEVICE_VECTOR 232
#define MSI_TARGET_CPU_SHIFT 12
+extern struct msi_ops msi_apic_ops;
+
+static inline int msi_arch_init(void)
+{
+ msi_register(&msi_apic_ops);
+ return 0;
+}
+
#endif /* ASM_MSI_H */