Altix: Add initial ACPI IO support

First phase in introducing ACPI support to SN.
In this phase, when running with an ACPI capable PROM,
the DSDT will define the root busses and all SN nodes
(SGIHUB, SGITIO). An ACPI bus driver will be registered
for the node devices, with the acpi_pci_root_driver being
used for the root busses. An ACPI vendor descriptor is
now used to pass platform specific information for both
nodes and busses, eliminating the need for the current
SAL calls. Also, with ACPI support, SN fixup code is no longer
needed to initiate the PCI bus scans, as the acpi_pci_root_driver
does that.

However, to maintain backward compatibility with non-ACPI capable
PROMs, none of the current 'fixup' code can been deleted, though
much restructuring has been done. For example, the bulk of the code
in io_common.c is relocated code that is now common regardless
of what PROM is running, while io_acpi_init.c and io_init.c contain
routines specific to an ACPI or non ACPI capable PROM respectively.

A new pci bus fixup platform vector has been created to provide
a hook for invoking platform specific bus fixup from pcibios_fixup_bus().

The size of io_space[] has been increased to support systems with
large IO configurations.


Signed-off-by: John Keller <jpk@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 1 insertions, 34 deletions

diff --git a/arch/ia64/sn/pci/pcibr/pcibr_provider.c b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
index 27dd7df0f446..6846dc9b432d 100644
--- a/arch/ia64/sn/pci/pcibr/pcibr_provider.c
+++ b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2001-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2001-2004, 2006 Silicon Graphics, Inc. All rights reserved.
  */
 
 #include <linux/interrupt.h>
@@ -109,7 +109,6 @@ void *
 pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *controller)
 {
 	int nasid, cnode, j;
-	cnodeid_t near_cnode;
 	struct hubdev_info *hubdev_info;
 	struct pcibus_info *soft;
 	struct sn_flush_device_kernel *sn_flush_device_kernel;
@@ -186,20 +185,6 @@ pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
 		return NULL;
 	}
 
-	if (prom_bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) {
-		/* TIO PCI Bridge: find nearest node with CPUs */
-		int e = sn_hwperf_get_nearest_node(cnode, NULL, &near_cnode);
-
-		if (e < 0) {
-			near_cnode = (cnodeid_t)-1; /* use any node */
-			printk(KERN_WARNING "pcibr_bus_fixup: failed to find "
-				"near node with CPUs to TIO node %d, err=%d\n",
-				cnode, e);
-		}
-		controller->node = near_cnode;
-	}
-	else
-		controller->node = cnode;
 	return soft;
 }
 
diff --git a/arch/ia64/sn/pci/tioce_provider.c b/arch/ia64/sn/pci/tioce_provider.c
index 46e16dcf5971..35f854fb6120 100644
--- a/arch/ia64/sn/pci/tioce_provider.c
+++ b/arch/ia64/sn/pci/tioce_provider.c
@@ -15,7 +15,6 @@
 #include <asm/sn/pcidev.h>
 #include <asm/sn/pcibus_provider_defs.h>
 #include <asm/sn/tioce_provider.h>
-#include <asm/sn/sn2/sn_hwperf.h>
 
 /*
  * 1/26/2006
@@ -990,8 +989,6 @@ tioce_target_interrupt(struct sn_irq_info *sn_irq_info)
 static void *
 tioce_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *controller)
 {
-	int my_nasid;
-	cnodeid_t my_cnode, mem_cnode;
 	struct tioce_common *tioce_common;
 	struct tioce_kernel *tioce_kern;
 	struct tioce __iomem *tioce_mmr;
@@ -1035,21 +1032,6 @@ tioce_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
 		       tioce_common->ce_pcibus.bs_persist_segment,
 		       tioce_common->ce_pcibus.bs_persist_busnum);
 
-	/*
-	 * identify closest nasid for memory allocations
-	 */
-
-	my_nasid = NASID_GET(tioce_common->ce_pcibus.bs_base);
-	my_cnode = nasid_to_cnodeid(my_nasid);
-
-	if (sn_hwperf_get_nearest_node(my_cnode, &mem_cnode, NULL) < 0) {
-		printk(KERN_WARNING "tioce_bus_fixup: failed to find "
-		       "closest node with MEM to TIO node %d\n", my_cnode);
-		mem_cnode = (cnodeid_t)-1; /* use any node */
-	}
-
-	controller->node = mem_cnode;
-
 	return tioce_common;
 }