x86, ioapic: Consolidate mp_ioapics[] into 'struct ioapic'

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: daniel.blueman@gmail.com
Link: http://lkml.kernel.org/r/20110518233157.909013179@sbsiddha-MOBL3.sc.intel.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>

5 files changed, 62 insertions, 50 deletions

diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
index 147700a3f56c..4f07bf637eb3 100644
--- a/arch/x86/include/asm/io_apic.h
+++ b/arch/x86/include/asm/io_apic.h
@@ -106,10 +106,10 @@ struct IR_IO_APIC_route_entry {
  */
 extern int nr_ioapics;
 
-#define MP_MAX_IOAPIC_PIN 127
+extern int mpc_ioapic_id(int ioapic);
+extern unsigned int mpc_ioapic_addr(int ioapic);
 
-/* I/O APIC entries */
-extern struct mpc_ioapic mp_ioapics[MAX_IO_APICS];
+#define MP_MAX_IOAPIC_PIN 127
 
 /* # of MP IRQ source entries */
 extern int mp_irq_entries;
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 9a966c579af5..4558f0d0822d 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -970,7 +970,7 @@ void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
         mp_irq.irqflag = (trigger << 2) | polarity;
         mp_irq.srcbus = MP_ISA_BUS;
         mp_irq.srcbusirq = bus_irq;     /* IRQ */
-        mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
+        mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
         mp_irq.dstirq = pin;    /* INTIN# */
 
         mp_save_irq(&mp_irq);
@@ -1021,7 +1021,7 @@ void __init mp_config_acpi_legacy_irqs(void)
                 if (ioapic < 0)
                         continue;
                 pin = mp_find_ioapic_pin(ioapic, gsi);
-                dstapic = mp_ioapics[ioapic].apicid;
+                dstapic = mpc_ioapic_id(ioapic);
 
                 for (idx = 0; idx < mp_irq_entries; idx++) {
                         struct mpc_intsrc *irq = mp_irqs + idx;
@@ -1082,7 +1082,7 @@ static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
         mp_irq.srcbus = number;
         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
         ioapic = mp_find_ioapic(gsi);
-        mp_irq.dstapic = mp_ioapics[ioapic].apicid;
+        mp_irq.dstapic = mpc_ioapic_id(ioapic);
         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
 
         mp_save_irq(&mp_irq);
@@ -1113,7 +1113,7 @@ int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 
         if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
                 printk(KERN_ERR "Invalid reference to IOAPIC pin "
-                       "%d-%d\n", mp_ioapics[ioapic].apicid,
+                       "%d-%d\n", mpc_ioapic_id(ioapic),
                        ioapic_pin);
                 return gsi;
         }
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index ceff2d26e498..e91131557b79 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -85,10 +85,22 @@ static struct ioapic {
          * Saved state during suspend/resume, or while enabling intr-remap.
          */
         struct IO_APIC_route_entry *saved_registers;
+        /* I/O APIC config */
+        struct mpc_ioapic mp_config;
 } ioapics[MAX_IO_APICS];
 
-/* I/O APIC entries */
-struct mpc_ioapic mp_ioapics[MAX_IO_APICS];
+#define mpc_ioapic_ver(id)              ioapics[id].mp_config.apicver
+
+int mpc_ioapic_id(int id)
+{
+        return ioapics[id].mp_config.apicid;
+}
+
+unsigned int mpc_ioapic_addr(int id)
+{
+        return ioapics[id].mp_config.apicaddr;
+}
+
 int nr_ioapics;
 
 /* IO APIC gsi routing info */
@@ -311,7 +323,7 @@ struct io_apic {
 static __attribute_const__ struct io_apic __iomem *io_apic_base(int idx)
 {
         return (void __iomem *) __fix_to_virt(FIX_IO_APIC_BASE_0 + idx)
-                + (mp_ioapics[idx].apicaddr & ~PAGE_MASK);
+                + (mpc_ioapic_addr(idx) & ~PAGE_MASK);
 }
 
 static inline void io_apic_eoi(unsigned int apic, unsigned int vector)
@@ -701,7 +713,7 @@ static int find_irq_entry(int apic, int pin, int type)
 
         for (i = 0; i < mp_irq_entries; i++)
                 if (mp_irqs[i].irqtype == type &&
-                    (mp_irqs[i].dstapic == mp_ioapics[apic].apicid ||
+                    (mp_irqs[i].dstapic == mpc_ioapic_id(apic) ||
                      mp_irqs[i].dstapic == MP_APIC_ALL) &&
                     mp_irqs[i].dstirq == pin)
                         return i;
@@ -743,7 +755,7 @@ static int __init find_isa_irq_apic(int irq, int type)
         if (i < mp_irq_entries) {
                 int apic;
                 for(apic = 0; apic < nr_ioapics; apic++) {
-                        if (mp_ioapics[apic].apicid == mp_irqs[i].dstapic)
+                        if (mpc_ioapic_id(apic) == mp_irqs[i].dstapic)
                                 return apic;
                 }
         }
@@ -973,7 +985,7 @@ int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin,
                 int lbus = mp_irqs[i].srcbus;
 
                 for (apic = 0; apic < nr_ioapics; apic++)
-                        if (mp_ioapics[apic].apicid == mp_irqs[i].dstapic ||
+                        if (mpc_ioapic_id(apic) == mp_irqs[i].dstapic ||
                             mp_irqs[i].dstapic == MP_APIC_ALL)
                                 break;
 
@@ -1320,14 +1332,14 @@ static void setup_ioapic_irq(int apic_id, int pin, unsigned int irq,
         apic_printk(APIC_VERBOSE,KERN_DEBUG
                     "IOAPIC[%d]: Set routing entry (%d-%d -> 0x%x -> "
                     "IRQ %d Mode:%i Active:%i)\n",
-                    apic_id, mp_ioapics[apic_id].apicid, pin, cfg->vector,
+                    apic_id, mpc_ioapic_id(apic_id), pin, cfg->vector,
                     irq, trigger, polarity);
 
 
-        if (setup_ioapic_entry(mp_ioapics[apic_id].apicid, irq, &entry,
+        if (setup_ioapic_entry(mpc_ioapic_id(apic_id), irq, &entry,
                                dest, trigger, polarity, cfg->vector, pin)) {
                 printk("Failed to setup ioapic entry for ioapic  %d, pin %d\n",
-                       mp_ioapics[apic_id].apicid, pin);
+                       mpc_ioapic_id(apic_id), pin);
                 __clear_irq_vector(irq, cfg);
                 return;
         }
@@ -1349,7 +1361,7 @@ static bool __init io_apic_pin_not_connected(int idx, int apic_id, int pin)
                 return false;
 
         apic_printk(APIC_VERBOSE, KERN_DEBUG " apic %d pin %d not connected\n",
-                    mp_ioapics[apic_id].apicid, pin);
+                    mpc_ioapic_id(apic_id), pin);
         return true;
 }
 
@@ -1481,7 +1493,7 @@ __apicdebuginit(void) print_IO_APIC(void)
         printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries);
         for (i = 0; i < nr_ioapics; i++)
                 printk(KERN_DEBUG "number of IO-APIC #%d registers: %d.\n",
-                       mp_ioapics[i].apicid, ioapics[i].nr_registers);
+                       mpc_ioapic_id(i), ioapics[i].nr_registers);
 
         /*
          * We are a bit conservative about what we expect.  We have to
@@ -1501,7 +1513,7 @@ __apicdebuginit(void) print_IO_APIC(void)
         raw_spin_unlock_irqrestore(&ioapic_lock, flags);
 
         printk("\n");
-        printk(KERN_DEBUG "IO APIC #%d......\n", mp_ioapics[apic].apicid);
+        printk(KERN_DEBUG "IO APIC #%d......\n", mpc_ioapic_id(apic));
         printk(KERN_DEBUG ".... register #00: %08X\n", reg_00.raw);
         printk(KERN_DEBUG ".......    : physical APIC id: %02X\n", reg_00.bits.ID);
         printk(KERN_DEBUG ".......    : Delivery Type: %X\n", reg_00.bits.delivery_type);
@@ -1919,14 +1931,14 @@ void __init setup_ioapic_ids_from_mpc_nocheck(void)
                 reg_00.raw = io_apic_read(apic_id, 0);
                 raw_spin_unlock_irqrestore(&ioapic_lock, flags);
 
-                old_id = mp_ioapics[apic_id].apicid;
+                old_id = mpc_ioapic_id(apic_id);
 
-                if (mp_ioapics[apic_id].apicid >= get_physical_broadcast()) {
+                if (mpc_ioapic_id(apic_id) >= get_physical_broadcast()) {
                         printk(KERN_ERR "BIOS bug, IO-APIC#%d ID is %d in the MPC table!...\n",
-                                apic_id, mp_ioapics[apic_id].apicid);
+                                apic_id, mpc_ioapic_id(apic_id));
                         printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n",
                                 reg_00.bits.ID);
-                        mp_ioapics[apic_id].apicid = reg_00.bits.ID;
+                        ioapics[apic_id].mp_config.apicid = reg_00.bits.ID;
                 }
 
                 /*
@@ -1935,9 +1947,9 @@ void __init setup_ioapic_ids_from_mpc_nocheck(void)
                  * 'stuck on smp_invalidate_needed IPI wait' messages.
                  */
                 if (apic->check_apicid_used(&phys_id_present_map,
-                                        mp_ioapics[apic_id].apicid)) {
+                                            mpc_ioapic_id(apic_id))) {
                         printk(KERN_ERR "BIOS bug, IO-APIC#%d ID %d is already used!...\n",
-                                apic_id, mp_ioapics[apic_id].apicid);
+                                apic_id, mpc_ioapic_id(apic_id));
                         for (i = 0; i < get_physical_broadcast(); i++)
                                 if (!physid_isset(i, phys_id_present_map))
                                         break;
@@ -1946,13 +1958,14 @@ void __init setup_ioapic_ids_from_mpc_nocheck(void)
                         printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n",
                                 i);
                         physid_set(i, phys_id_present_map);
-                        mp_ioapics[apic_id].apicid = i;
+                        ioapics[apic_id].mp_config.apicid = i;
                 } else {
                         physid_mask_t tmp;
-                        apic->apicid_to_cpu_present(mp_ioapics[apic_id].apicid, &tmp);
+                        apic->apicid_to_cpu_present(mpc_ioapic_id(apic_id),
+                                                    &tmp);
                         apic_printk(APIC_VERBOSE, "Setting %d in the "
                                         "phys_id_present_map\n",
-                                        mp_ioapics[apic_id].apicid);
+                                        mpc_ioapic_id(apic_id));
                         physids_or(phys_id_present_map, phys_id_present_map, tmp);
                 }
 
@@ -1960,24 +1973,24 @@ void __init setup_ioapic_ids_from_mpc_nocheck(void)
                  * We need to adjust the IRQ routing table
                  * if the ID changed.
                  */
-                if (old_id != mp_ioapics[apic_id].apicid)
+                if (old_id != mpc_ioapic_id(apic_id))
                         for (i = 0; i < mp_irq_entries; i++)
                                 if (mp_irqs[i].dstapic == old_id)
                                         mp_irqs[i].dstapic
-                                                = mp_ioapics[apic_id].apicid;
+                                                = mpc_ioapic_id(apic_id);
 
                 /*
                  * Update the ID register according to the right value
                  * from the MPC table if they are different.
                  */
-                if (mp_ioapics[apic_id].apicid == reg_00.bits.ID)
+                if (mpc_ioapic_id(apic_id) == reg_00.bits.ID)
                         continue;
 
                 apic_printk(APIC_VERBOSE, KERN_INFO
                         "...changing IO-APIC physical APIC ID to %d ...",
-                        mp_ioapics[apic_id].apicid);
+                        mpc_ioapic_id(apic_id));
 
-                reg_00.bits.ID = mp_ioapics[apic_id].apicid;
+                reg_00.bits.ID = mpc_ioapic_id(apic_id);
                 raw_spin_lock_irqsave(&ioapic_lock, flags);
                 io_apic_write(apic_id, 0, reg_00.raw);
                 raw_spin_unlock_irqrestore(&ioapic_lock, flags);
@@ -1988,7 +2001,7 @@ void __init setup_ioapic_ids_from_mpc_nocheck(void)
                 raw_spin_lock_irqsave(&ioapic_lock, flags);
                 reg_00.raw = io_apic_read(apic_id, 0);
                 raw_spin_unlock_irqrestore(&ioapic_lock, flags);
-                if (reg_00.bits.ID != mp_ioapics[apic_id].apicid)
+                if (reg_00.bits.ID != mpc_ioapic_id(apic_id))
                         printk("could not set ID!\n");
                 else
                         apic_printk(APIC_VERBOSE, " ok.\n");
@@ -2374,7 +2387,7 @@ static void eoi_ioapic_irq(unsigned int irq, struct irq_cfg *cfg)
 
         raw_spin_lock_irqsave(&ioapic_lock, flags);
         for_each_irq_pin(entry, cfg->irq_2_pin) {
-                if (mp_ioapics[entry->apic].apicver >= 0x20) {
+                if (mpc_ioapic_ver(entry->apic) >= 0x20) {
                         /*
                          * Intr-remapping uses pin number as the virtual vector
                          * in the RTE. Actual vector is programmed in
@@ -2896,8 +2909,8 @@ static void resume_ioapic_id(int ioapic_id)
 
         raw_spin_lock_irqsave(&ioapic_lock, flags);
         reg_00.raw = io_apic_read(ioapic_id, 0);
-        if (reg_00.bits.ID != mp_ioapics[ioapic_id].apicid) {
-                reg_00.bits.ID = mp_ioapics[ioapic_id].apicid;
+        if (reg_00.bits.ID != mpc_ioapic_id(ioapic_id)) {
+                reg_00.bits.ID = mpc_ioapic_id(ioapic_id);
                 io_apic_write(ioapic_id, 0, reg_00.raw);
         }
         raw_spin_unlock_irqrestore(&ioapic_lock, flags);
@@ -3524,7 +3537,7 @@ int io_apic_setup_irq_pin_once(unsigned int irq, int node,
         /* Avoid redundant programming */
         if (test_bit(pin, mp_ioapic_routing[id].pin_programmed)) {
                 pr_debug("Pin %d-%d already programmed\n",
-                         mp_ioapics[id].apicid, pin);
+                         mpc_ioapic_id(id), pin);
                 return 0;
         }
         ret = io_apic_setup_irq_pin(irq, node, attr);
@@ -3694,8 +3707,7 @@ static u8 __init io_apic_unique_id(u8 id)
 
         bitmap_zero(used, 256);
         for (i = 0; i < nr_ioapics; i++) {
-                struct mpc_ioapic *ia = &mp_ioapics[i];
-                __set_bit(ia->apicid, used);
+                __set_bit(mpc_ioapic_id(i), used);
         }
         if (!test_bit(id, used))
                 return id;
@@ -3826,7 +3838,7 @@ void __init ioapic_and_gsi_init(void)
         ioapic_res = ioapic_setup_resources(nr_ioapics);
         for (i = 0; i < nr_ioapics; i++) {
                 if (smp_found_config) {
-                        ioapic_phys = mp_ioapics[i].apicaddr;
+                        ioapic_phys = mpc_ioapic_addr(i);
 #ifdef CONFIG_X86_32
                         if (!ioapic_phys) {
                                 printk(KERN_ERR
@@ -3930,13 +3942,13 @@ void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
 
         idx = nr_ioapics;
 
-        mp_ioapics[idx].type = MP_IOAPIC;
-        mp_ioapics[idx].flags = MPC_APIC_USABLE;
-        mp_ioapics[idx].apicaddr = address;
+        ioapics[idx].mp_config.type = MP_IOAPIC;
+        ioapics[idx].mp_config.flags = MPC_APIC_USABLE;
+        ioapics[idx].mp_config.apicaddr = address;
 
         set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
-        mp_ioapics[idx].apicid = io_apic_unique_id(id);
-        mp_ioapics[idx].apicver = io_apic_get_version(idx);
+        ioapics[idx].mp_config.apicid = io_apic_unique_id(id);
+        ioapics[idx].mp_config.apicver = io_apic_get_version(idx);
 
         /*
          * Build basic GSI lookup table to facilitate gsi->io_apic lookups
@@ -3955,8 +3967,8 @@ void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
                 gsi_top = mp_gsi_routing[idx].gsi_end + 1;
 
         printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, "
-               "GSI %d-%d\n", idx, mp_ioapics[idx].apicid,
-               mp_ioapics[idx].apicver, mp_ioapics[idx].apicaddr,
+               "GSI %d-%d\n", idx, mpc_ioapic_id(idx),
+               mpc_ioapic_ver(idx), mpc_ioapic_addr(idx),
                mp_gsi_routing[idx].gsi_base, mp_gsi_routing[idx].gsi_end);
 
         nr_ioapics++;
diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index e90f08458e6b..f06494e93760 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -407,7 +407,7 @@ static void __init ioapic_add_ofnode(struct device_node *np)
         }
 
         for (i = 0; i < nr_ioapics; i++) {
-                if (r.start == mp_ioapics[i].apicaddr) {
+                if (r.start == mpc_ioapic_addr(i)) {
                         struct irq_domain *id;
 
                         id = kzalloc(sizeof(*id), GFP_KERNEL);
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 6f9bfffb2720..9103b89c145a 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -285,7 +285,7 @@ static void __init construct_default_ioirq_mptable(int mpc_default_type)
         intsrc.type = MP_INTSRC;
         intsrc.irqflag = 0;     /* conforming */
         intsrc.srcbus = 0;
-        intsrc.dstapic = mp_ioapics[0].apicid;
+        intsrc.dstapic = mpc_ioapic_id(0);
 
         intsrc.irqtype = mp_INT;