[PATCH] PCI: altix: msi support

MSI callouts for altix.  Involves a fair amount of code reorg in sn irq.c
code as well as adding some extensions to the altix PCI provider abstaction.

Signed-off-by: Mark Maule <maule@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

4 files changed, 27 insertions, 6 deletions

diff --git a/include/asm-ia64/sn/intr.h b/include/asm-ia64/sn/intr.h
index 60a51a4..12b54dd 100644
--- a/include/asm-ia64/sn/intr.h
+++ b/include/asm-ia64/sn/intr.h
@@ -10,6 +10,7 @@
 #define _ASM_IA64_SN_INTR_H
 
 #include <linux/rcupdate.h>
+#include <asm/sn/types.h>
 
 #define SGI_UART_VECTOR		0xe9
 
@@ -40,6 +41,7 @@ struct sn_irq_info {
 	int		irq_cpuid;	/* kernel logical cpuid	     */
 	int		irq_irq;	/* the IRQ number */
 	int		irq_int_bit;	/* Bridge interrupt pin */
+					/* <0 means MSI */
 	u64	irq_xtalkaddr;	/* xtalkaddr IRQ is sent to  */
 	int		irq_bridge_type;/* pciio asic type (pciio.h) */
 	void	       *irq_bridge;	/* bridge generating irq     */
@@ -53,6 +55,12 @@ struct sn_irq_info {
 };
 
 extern void sn_send_IPI_phys(int, long, int, int);
+extern u64 sn_intr_alloc(nasid_t, int,
+			      struct sn_irq_info *,
+			      int, nasid_t, int);
+extern void sn_intr_free(nasid_t, int, struct sn_irq_info *);
+extern struct sn_irq_info *sn_retarget_vector(struct sn_irq_info *, nasid_t, int);
+extern struct list_head **sn_irq_lh;
 
 #define CPU_VECTOR_TO_IRQ(cpuid,vector) (vector)
 
diff --git a/include/asm-ia64/sn/pcibr_provider.h b/include/asm-ia64/sn/pcibr_provider.h
index 51260ab..e3b0c3f 100644
--- a/include/asm-ia64/sn/pcibr_provider.h
+++ b/include/asm-ia64/sn/pcibr_provider.h
@@ -55,6 +55,7 @@
 #define PCI32_ATE_V                     (0x1 << 0)
 #define PCI32_ATE_CO                    (0x1 << 1)
 #define PCI32_ATE_PREC                  (0x1 << 2)
+#define PCI32_ATE_MSI                   (0x1 << 2)
 #define PCI32_ATE_PREF                  (0x1 << 3)
 #define PCI32_ATE_BAR                   (0x1 << 4)
 #define PCI32_ATE_ADDR_SHFT             12
@@ -117,8 +118,8 @@ struct pcibus_info {
 
 extern int  pcibr_init_provider(void);
 extern void *pcibr_bus_fixup(struct pcibus_bussoft *, struct pci_controller *);
-extern dma_addr_t pcibr_dma_map(struct pci_dev *, unsigned long, size_t);
-extern dma_addr_t pcibr_dma_map_consistent(struct pci_dev *, unsigned long, size_t);
+extern dma_addr_t pcibr_dma_map(struct pci_dev *, unsigned long, size_t, int type);
+extern dma_addr_t pcibr_dma_map_consistent(struct pci_dev *, unsigned long, size_t, int type);
 extern void pcibr_dma_unmap(struct pci_dev *, dma_addr_t, int);
 
 /*
diff --git a/include/asm-ia64/sn/pcibus_provider_defs.h b/include/asm-ia64/sn/pcibus_provider_defs.h
index ce3f6c3..8f7c83d 100644
--- a/include/asm-ia64/sn/pcibus_provider_defs.h
+++ b/include/asm-ia64/sn/pcibus_provider_defs.h
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 1992 - 1997, 2000-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved.
  */
 #ifndef _ASM_IA64_SN_PCI_PCIBUS_PROVIDER_H
 #define _ASM_IA64_SN_PCI_PCIBUS_PROVIDER_H
@@ -45,13 +45,24 @@ struct pci_controller;
  */
 
 struct sn_pcibus_provider {
-	dma_addr_t	(*dma_map)(struct pci_dev *, unsigned long, size_t);
-	dma_addr_t	(*dma_map_consistent)(struct pci_dev *, unsigned long, size_t);
+	dma_addr_t	(*dma_map)(struct pci_dev *, unsigned long, size_t, int flags);
+	dma_addr_t	(*dma_map_consistent)(struct pci_dev *, unsigned long, size_t, int flags);
 	void		(*dma_unmap)(struct pci_dev *, dma_addr_t, int);
 	void *		(*bus_fixup)(struct pcibus_bussoft *, struct pci_controller *);
  	void		(*force_interrupt)(struct sn_irq_info *);
  	void		(*target_interrupt)(struct sn_irq_info *);
 };
 
+/*
+ * Flags used by the map interfaces
+ * bits 3:0 specifies format of passed in address
+ * bit  4   specifies that address is to be used for MSI
+ */
+
+#define SN_DMA_ADDRTYPE(x)	((x) & 0xf)
+#define     SN_DMA_ADDR_PHYS	1	/* address is an xio address. */
+#define     SN_DMA_ADDR_XIO	2	/* address is phys memory */
+#define SN_DMA_MSI		0x10	/* Bus address is to be used for MSI */
+
 extern struct sn_pcibus_provider *sn_pci_provider[];
 #endif				/* _ASM_IA64_SN_PCI_PCIBUS_PROVIDER_H */
diff --git a/include/asm-ia64/sn/tiocp.h b/include/asm-ia64/sn/tiocp.h
index f47c08a..e8ad0bb 100644
--- a/include/asm-ia64/sn/tiocp.h
+++ b/include/asm-ia64/sn/tiocp.h
@@ -3,13 +3,14 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2003-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2003-2005 Silicon Graphics, Inc. All rights reserved.
  */
 #ifndef _ASM_IA64_SN_PCI_TIOCP_H
 #define _ASM_IA64_SN_PCI_TIOCP_H
 
 #define TIOCP_HOST_INTR_ADDR            0x003FFFFFFFFFFFFFUL
 #define TIOCP_PCI64_CMDTYPE_MEM         (0x1ull << 60)
+#define TIOCP_PCI64_CMDTYPE_MSI         (0x3ull << 60)
 
 
 /*****************************************************************************