block: Consolidate phys_segment and hw_segment limits

[safe/jmp/linux-2.6] / drivers / ide / ide-scan-pci.c

diff --git a/drivers/ide/ide-scan-pci.c b/drivers/ide/ide-scan-pci.c
index 23015d8..0e79eff 100644 (file)
--- a/drivers/ide/ide-scan-pci.c
+++ b/drivers/ide/ide-scan-pci.c
@@ -1,11 +1,111 @@
+/*
+ * support for probing IDE PCI devices in the PCI bus order
+ *
+ * Copyright (c) 1998-2000  Andre Hedrick <andre@linux-ide.org>
+ * Copyright (c) 1995-1998  Mark Lord
+ *
+ * May be copied or modified under the terms of the GNU General Public License
+ */
+
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/ide.h>
 
-static int __init ide_scan_pci(void)
+/*
+ *     Module interfaces
+ */
+
+static int pre_init = 1;               /* Before first ordered IDE scan */
+static LIST_HEAD(ide_pci_drivers);
+
+/*
+ *     __ide_pci_register_driver       -       attach IDE driver
+ *     @driver: pci driver
+ *     @module: owner module of the driver
+ *
+ *     Registers a driver with the IDE layer. The IDE layer arranges that
+ *     boot time setup is done in the expected device order and then
+ *     hands the controllers off to the core PCI code to do the rest of
+ *     the work.
+ *
+ *     Returns are the same as for pci_register_driver
+ */
+
+int __ide_pci_register_driver(struct pci_driver *driver, struct module *module,
+                             const char *mod_name)
+{
+       if (!pre_init)
+               return __pci_register_driver(driver, module, mod_name);
+       driver->driver.owner = module;
+       list_add_tail(&driver->node, &ide_pci_drivers);
+       return 0;
+}
+EXPORT_SYMBOL_GPL(__ide_pci_register_driver);
+
+/**
+ *     ide_scan_pcidev         -       find an IDE driver for a device
+ *     @dev: PCI device to check
+ *
+ *     Look for an IDE driver to handle the device we are considering.
+ *     This is only used during boot up to get the ordering correct. After
+ *     boot up the pci layer takes over the job.
+ */
+
+static int __init ide_scan_pcidev(struct pci_dev *dev)
+{
+       struct list_head *l;
+       struct pci_driver *d;
+
+       list_for_each(l, &ide_pci_drivers) {
+               d = list_entry(l, struct pci_driver, node);
+               if (d->id_table) {
+                       const struct pci_device_id *id =
+                               pci_match_id(d->id_table, dev);
+
+                       if (id != NULL && d->probe(dev, id) >= 0) {
+                               dev->driver = d;
+                               pci_dev_get(dev);
+                               return 1;
+                       }
+               }
+       }
+       return 0;
+}
+
+/**
+ *     ide_scan_pcibus         -       perform the initial IDE driver scan
+ *
+ *     Perform the initial bus rather than driver ordered scan of the
+ *     PCI drivers. After this all IDE pci handling becomes standard
+ *     module ordering not traditionally ordered.
+ */
+
+static int __init ide_scan_pcibus(void)
 {
-       return ide_scan_pcibus();
+       struct pci_dev *dev = NULL;
+       struct pci_driver *d;
+       struct list_head *l, *n;
+
+       pre_init = 0;
+       while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)))
+               ide_scan_pcidev(dev);
+
+       /*
+        *      Hand the drivers over to the PCI layer now we
+        *      are post init.
+        */
+
+       list_for_each_safe(l, n, &ide_pci_drivers) {
+               list_del(l);
+               d = list_entry(l, struct pci_driver, node);
+               if (__pci_register_driver(d, d->driver.owner,
+                                         d->driver.mod_name))
+                       printk(KERN_ERR "%s: failed to register %s driver\n",
+                                       __func__, d->driver.mod_name);
+       }
+
+       return 0;
 }
 
-module_init(ide_scan_pci);
+module_init(ide_scan_pcibus);