Altix: ACPI SSDT PCI device support

Add SN platform support for running with an ACPI
capable PROM that defines PCI devices in SSDT
tables. There is a SSDT table for every occupied
slot on a root bus, containing info for every
PPB and/or device on the bus. The SSDTs will be
dynamically loaded/unloaded at hotplug enable/disable.

Platform specific information that is currently
passed via a SAL call, will now be passed via the
Vendor resource in the ACPI Device object(s) defined
in each SSDT.

Signed-off-by: John Keller <jpk@sgi.com>
Cc: Greg KH <greg@kroah.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 20 insertions, 71 deletions

diff --git a/arch/ia64/sn/kernel/io_common.c b/arch/ia64/sn/kernel/io_common.c
index 75f0379958f9..d48bcd83253c 100644
--- a/arch/ia64/sn/kernel/io_common.c
+++ b/arch/ia64/sn/kernel/io_common.c
@@ -26,14 +26,10 @@
 #include <linux/acpi.h>
 #include <asm/sn/sn2/sn_hwperf.h>
 #include <asm/sn/acpi.h>
+#include "acpi/acglobal.h"
 
 extern void sn_init_cpei_timer(void);
 extern void register_sn_procfs(void);
-extern void sn_acpi_bus_fixup(struct pci_bus *);
-extern void sn_bus_fixup(struct pci_bus *);
-extern void sn_acpi_slot_fixup(struct pci_dev *, struct pcidev_info *);
-extern void sn_more_slot_fixup(struct pci_dev *, struct pcidev_info *);
-extern void sn_legacy_pci_window_fixup(struct pci_controller *, u64, u64);
 extern void sn_io_acpi_init(void);
 extern void sn_io_init(void);
 
@@ -48,16 +44,10 @@ struct sysdata_el {
 
 int sn_ioif_inited;             /* SN I/O infrastructure initialized? */
 
-struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];       /* indexed by asic type */
+int sn_acpi_rev;                /* SN ACPI revision */
+EXPORT_SYMBOL_GPL(sn_acpi_rev);
 
-int sn_acpi_base_support(void)
-{
-        struct acpi_table_header *header;
-        (void)acpi_get_table_by_index(ACPI_TABLE_INDEX_DSDT, &header);
-        if (header && header->oem_revision >= 0x20101)
-                return 1;
-        return 0;
-}
+struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];       /* indexed by asic type */
 
 /*
  * Hooks and struct for unsupported pci providers
@@ -108,25 +98,6 @@ sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_num,
 }
 
 /*
- * Retrieve the pci device information given the bus and device|function number.
- */
-static inline u64
-sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
-                    u64 sn_irq_info)
-{
-        struct ia64_sal_retval ret_stuff;
-        ret_stuff.status = 0;
-        ret_stuff.v0 = 0;
-
-        SAL_CALL_NOLOCK(ret_stuff,
-                        (u64) SN_SAL_IOIF_GET_PCIDEV_INFO,
-                        (u64) segment, (u64) bus_number, (u64) devfn,
-                        (u64) pci_dev,
-                        sn_irq_info, 0, 0);
-        return ret_stuff.v0;
-}
-
-/*
  * sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified
  *                        device.
  */
@@ -258,50 +229,25 @@ void sn_pci_unfixup_slot(struct pci_dev *dev)
 }
 
 /*
- * sn_pci_fixup_slot() - This routine sets up a slot's resources consistent
- *                       with the Linux PCI abstraction layer. Resources
- *                       acquired from our PCI provider include PIO maps
- *                       to BAR space and interrupt objects.
+ * sn_pci_fixup_slot()
  */
-void sn_pci_fixup_slot(struct pci_dev *dev)
+void sn_pci_fixup_slot(struct pci_dev *dev, struct pcidev_info *pcidev_info,
+                       struct sn_irq_info *sn_irq_info)
 {
         int segment = pci_domain_nr(dev->bus);
-        int status = 0;
         struct pcibus_bussoft *bs;
-        struct pci_bus *host_pci_bus;
-        struct pci_dev *host_pci_dev;
-        struct pcidev_info *pcidev_info;
-        struct sn_irq_info *sn_irq_info;
-        unsigned int bus_no, devfn;
+        struct pci_bus *host_pci_bus;
+        struct pci_dev *host_pci_dev;
+        unsigned int bus_no, devfn;
 
         pci_dev_get(dev); /* for the sysdata pointer */
-        pcidev_info = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL);
-        if (!pcidev_info)
-                BUG();          /* Cannot afford to run out of memory */
-
-        sn_irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
-        if (!sn_irq_info)
-                BUG();          /* Cannot afford to run out of memory */
-
-        /* Call to retrieve pci device information needed by kernel. */
-        status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number,
-                                     dev->devfn,
-                                     (u64) __pa(pcidev_info),
-                                     (u64) __pa(sn_irq_info));
-        if (status)
-                BUG(); /* Cannot get platform pci device information */
 
         /* Add pcidev_info to list in pci_controller.platform_data */
         list_add_tail(&pcidev_info->pdi_list,
                       &(SN_PLATFORM_DATA(dev->bus)->pcidev_info));
-
-        if (SN_ACPI_BASE_SUPPORT())
-                sn_acpi_slot_fixup(dev, pcidev_info);
-        else
-                sn_more_slot_fixup(dev, pcidev_info);
         /*
          * Using the PROMs values for the PCI host bus, get the Linux
-         * PCI host_pci_dev struct and set up host bus linkages
+         * PCI host_pci_dev struct and set up host bus linkages
          */
 
         bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
@@ -498,11 +444,6 @@ void sn_generate_path(struct pci_bus *pci_bus, char *address)
                         sprintf(address, "%s^%d", address, geo_slot(geoid));
 }
 
-/*
- * sn_pci_fixup_bus() - Perform SN specific setup of software structs
- *                      (pcibus_bussoft, pcidev_info) and hardware
- *                      registers, for the specified bus and devices under it.
- */
 void __devinit
 sn_pci_fixup_bus(struct pci_bus *bus)
 {
@@ -528,6 +469,15 @@ sn_io_early_init(void)
         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
                 return 0;
 
+        /* we set the acpi revision to that of the DSDT table OEM rev. */
+        {
+                struct acpi_table_header *header = NULL;
+
+                acpi_get_table_by_index(ACPI_TABLE_INDEX_DSDT, &header);
+                BUG_ON(header == NULL);
+                sn_acpi_rev = header->oem_revision;
+        }
+
         /*
          * prime sn_pci_provider[].  Individial provider init routines will
          * override their respective default entries.
@@ -618,7 +568,6 @@ sn_io_late_init(void)
 
 fs_initcall(sn_io_late_init);
 
-EXPORT_SYMBOL(sn_pci_fixup_slot);
 EXPORT_SYMBOL(sn_pci_unfixup_slot);
 EXPORT_SYMBOL(sn_bus_store_sysdata);
 EXPORT_SYMBOL(sn_bus_free_sysdata);