[IA64] introduce iosapci ID.

introduce iosapci ID, which is used to index DMA engine covering this iosapic.

Signed-off-by; Anthony Xu <anthony.xu@intel.com>

xen/arch/ia64/linux-xen/acpi.c

@@ -294,7 +294,12 @@ acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end
 	if (BAD_MADT_ENTRY(iosapic, end))
 		return -EINVAL;
 
+#ifndef XEN
 	return iosapic_init(iosapic->address, iosapic->global_irq_base);
+#else
+	return iosapic_init(iosapic->address, iosapic->global_irq_base,
+			    iosapic->id);
+#endif
 }
 
 static unsigned int __initdata acpi_madt_rev;

xen/arch/ia64/linux-xen/iosapic.c

@@ -128,6 +128,7 @@ static struct iosapic_intr_info {
 	unsigned char	trigger	: 1;	/* trigger mode (see iosapic.h) */
 } iosapic_intr_info[IA64_NUM_VECTORS];
 
+#ifndef XEN
 static struct iosapic {
 	char __iomem	*addr;		/* base address of IOSAPIC */
 	unsigned int 	gsi_base;	/* first GSI assigned to this IOSAPIC */
@@ -137,6 +138,9 @@ static struct iosapic {
 	unsigned short	node;		/* numa node association via pxm */
 #endif
 } iosapic_lists[NR_IOSAPICS];
+#else
+struct iosapic iosapic_lists[NR_IOSAPICS];
+#endif
 
 static unsigned char pcat_compat __devinitdata;	/* 8259 compatibility flag */
 
@@ -1035,7 +1039,11 @@ iosapic_check_gsi_range (unsigned int gsi_base, unsigned int ver)
 }
 
 int __devinit
+#ifndef XEN
 iosapic_init (unsigned long phys_addr, unsigned int gsi_base)
+#else	
+iosapic_init (unsigned long phys_addr, unsigned int gsi_base, unsigned int id)
+#endif
 {
 	int num_rte, err, index;
 	unsigned int isa_irq, ver;
@@ -1064,6 +1072,9 @@ iosapic_init (unsigned long phys_addr, unsigned int gsi_base)
 		iosapic_lists[index].addr = addr;
 		iosapic_lists[index].gsi_base = gsi_base;
 		iosapic_lists[index].num_rte = num_rte;
+#ifdef XEN
+		iosapic_lists[index].id = id;
+#endif
 #ifdef CONFIG_NUMA
 		iosapic_lists[index].node = MAX_NUMNODES;
 #endif

xen/include/asm-ia64/linux-xen/asm/iosapic.h

@@ -53,6 +53,34 @@
 
 #define NR_IOSAPICS			256
 
+#ifdef XEN
+struct iosapic {
+	char __iomem    *addr;      /* base address of IOSAPIC */
+	unsigned int    gsi_base;   /* first GSI assigned to this IOSAPIC */
+	unsigned short  num_rte;    /* number of RTE in this IOSAPIC */
+	int     rtes_inuse; /* # of RTEs in use on this IOSAPIC */
+	unsigned int    id;			/*  APIC ID */
+#ifdef CONFIG_NUMA
+	unsigned short  node;       /* numa node association via pxm */
+#endif
+};
+
+extern struct iosapic iosapic_lists[NR_IOSAPICS];
+
+static inline int find_iosapic_by_addr(unsigned long addr)
+{
+	int i;
+
+	for (i = 0; i < NR_IOSAPICS; i++) {
+		if ((unsigned long)iosapic_lists[i].addr == addr)
+			return i;
+	}
+
+	return -1;
+}
+#endif
+
+
 static inline unsigned int iosapic_read(char __iomem *iosapic, unsigned int reg)
 {
 	writel(reg, iosapic + IOSAPIC_REG_SELECT);
@@ -71,8 +99,13 @@ static inline void iosapic_eoi(char __iomem *iosapic, u32 vector)
 }
 
 extern void __init iosapic_system_init (int pcat_compat);
+#ifndef	XEN
 extern int __devinit iosapic_init (unsigned long address,
 				    unsigned int gsi_base);
+#else
+extern int __devinit iosapic_init (unsigned long address,
+				   unsigned int gsi_base, unsigned int id);
+#endif
 #ifdef CONFIG_HOTPLUG
 extern int iosapic_remove (unsigned int gsi_base);
 #else