fedora core 6 1.2949 + vserver 2.2.0
[linux-2.6.git] / drivers / ide / ide.c
index b2cc437..8e73fe5 100644 (file)
 
 #define _IDE_C                 /* Tell ide.h it's really us */
 
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/string.h>
 #include <linux/pci.h>
 #include <linux/delay.h>
 #include <linux/ide.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/completion.h>
 #include <linux/reboot.h>
 #include <linux/cdrom.h>
@@ -452,7 +450,7 @@ void ide_hwif_release_regions(ide_hwif_t *hwif)
  *     @hwif: hwif to update
  *     @tmp_hwif: template
  *
- *     Restore hwif to a previous state by copying most settngs
+ *     Restore hwif to a previous state by copying most settings
  *     from the template.
  */
 
@@ -505,6 +503,7 @@ static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
        hwif->ide_dma_on                = tmp_hwif->ide_dma_on;
        hwif->ide_dma_off_quietly       = tmp_hwif->ide_dma_off_quietly;
        hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
+       hwif->ide_dma_clear_irq         = tmp_hwif->ide_dma_clear_irq;
        hwif->ide_dma_host_on           = tmp_hwif->ide_dma_host_on;
        hwif->ide_dma_host_off          = tmp_hwif->ide_dma_host_off;
        hwif->ide_dma_lostirq           = tmp_hwif->ide_dma_lostirq;
@@ -541,9 +540,10 @@ static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
        hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
        hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 
-       hwif->dma_extra                 = tmp_hwif->dma_extra;
        hwif->config_data               = tmp_hwif->config_data;
        hwif->select_data               = tmp_hwif->select_data;
+       hwif->extra_base                = tmp_hwif->extra_base;
+       hwif->extra_ports               = tmp_hwif->extra_ports;
        hwif->autodma                   = tmp_hwif->autodma;
        hwif->udma_four                 = tmp_hwif->udma_four;
        hwif->no_dsc                    = tmp_hwif->no_dsc;
@@ -552,7 +552,7 @@ static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 }
 
 /**
- *     ide_unregister          -       free an ide interface
+ *     ide_unregister          -       free an IDE interface
  *     @index: index of interface (will change soon to a pointer)
  *
  *     Perform the final unregister of an IDE interface. At the moment
@@ -565,8 +565,8 @@ static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
  *     deadlocking the IDE layer. The shutdown callback is called
  *     before we take the lock and free resources. It is up to the
  *     caller to be sure there is no pending I/O here, and that
- *     the interfce will not be reopened (present/vanishing locking
- *     isnt yet done btw). After we commit to the final kill we
+ *     the interface will not be reopened (present/vanishing locking
+ *     isn't yet done BTW). After we commit to the final kill we
  *     call the cleanup callback with the ide locks held.
  *
  *     Unregister restores the hwif structures to the default state.
@@ -592,13 +592,8 @@ void ide_unregister(unsigned int index)
                goto abort;
        for (unit = 0; unit < MAX_DRIVES; ++unit) {
                drive = &hwif->drives[unit];
-               if (!drive->present) {
-                       if (drive->devfs_name[0] != '\0') {
-                               devfs_remove(drive->devfs_name);
-                               drive->devfs_name[0] = '\0';
-                       }
+               if (!drive->present)
                        continue;
-               }
                spin_unlock_irq(&ide_lock);
                device_unregister(&drive->gendev);
                wait_for_completion(&drive->gendev_rel_comp);
@@ -681,6 +676,9 @@ void ide_unregister(unsigned int index)
                hwif->dma_status = 0;
                hwif->dma_vendor3 = 0;
                hwif->dma_prdtable = 0;
+
+               hwif->extra_base  = 0;
+               hwif->extra_ports = 0;
        }
 
        /* copy original settings */
@@ -726,6 +724,7 @@ void ide_setup_ports (      hw_regs_t *hw,
 {
        int i;
 
+       memset(hw, 0, sizeof(hw_regs_t));
        for (i = 0; i < IDE_NR_PORTS; i++) {
                if (offsets[i] == -1) {
                        switch(i) {
@@ -975,8 +974,8 @@ ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
  *     @drive: drive
  *
  *     Automatically remove all the driver specific settings for this
- *     drive. This function may sleep and must not be called from IRQ
- *     context. The caller must hold ide_setting_sem.
+ *     drive. This function may not be called from IRQ context. The
+ *     caller must hold ide_setting_sem.
  */
  
 static void auto_remove_settings (ide_drive_t *drive)
@@ -1213,7 +1212,7 @@ int system_bus_clock (void)
 
 EXPORT_SYMBOL(system_bus_clock);
 
-static int generic_ide_suspend(struct device *dev, pm_message_t state)
+static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 {
        ide_drive_t *drive = dev->driver_data;
        struct request rq;
@@ -1223,11 +1222,13 @@ static int generic_ide_suspend(struct device *dev, pm_message_t state)
        memset(&rq, 0, sizeof(rq));
        memset(&rqpm, 0, sizeof(rqpm));
        memset(&args, 0, sizeof(args));
-       rq.flags = REQ_PM_SUSPEND;
+       rq.cmd_type = REQ_TYPE_PM_SUSPEND;
        rq.special = &args;
-       rq.pm = &rqpm;
+       rq.data = &rqpm;
        rqpm.pm_step = ide_pm_state_start_suspend;
-       rqpm.pm_state = state.event;
+       if (mesg.event == PM_EVENT_PRETHAW)
+               mesg.event = PM_EVENT_FREEZE;
+       rqpm.pm_state = mesg.event;
 
        return ide_do_drive_cmd(drive, &rq, ide_wait);
 }
@@ -1242,9 +1243,9 @@ static int generic_ide_resume(struct device *dev)
        memset(&rq, 0, sizeof(rq));
        memset(&rqpm, 0, sizeof(rqpm));
        memset(&args, 0, sizeof(args));
-       rq.flags = REQ_PM_RESUME;
+       rq.cmd_type = REQ_TYPE_PM_RESUME;
        rq.special = &args;
-       rq.pm = &rqpm;
+       rq.data = &rqpm;
        rqpm.pm_step = ide_pm_state_start_resume;
        rqpm.pm_state = PM_EVENT_ON;
 
@@ -1364,10 +1365,14 @@ int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device
 
                        spin_lock_irqsave(&ide_lock, flags);
 
+                       if (HWGROUP(drive)->resetting) {
+                               spin_unlock_irqrestore(&ide_lock, flags);
+                               return -EBUSY;
+                       }
+
                        ide_abort(drive, "drive reset");
 
-                       if(HWGROUP(drive)->handler)
-                               BUG();
+                       BUG_ON(HWGROUP(drive)->handler);
                                
                        /* Ensure nothing gets queued after we
                           drop the lock. Reset will clear the busy */
@@ -1546,7 +1551,7 @@ static int __init ide_setup(char *s)
                const char *hd_words[] = {
                        "none", "noprobe", "nowerr", "cdrom", "serialize",
                        "autotune", "noautotune", "minus8", "swapdata", "bswap",
-                       "minus11", "remap", "remap63", "scsi", NULL };
+                       "noflush", "remap", "remap63", "scsi", NULL };
                unit = s[2] - 'a';
                hw   = unit / MAX_DRIVES;
                unit = unit % MAX_DRIVES;
@@ -1585,6 +1590,9 @@ static int __init ide_setup(char *s)
                        case -10: /* "bswap" */
                                drive->bswap = 1;
                                goto done;
+                       case -11: /* noflush */
+                               drive->noflush = 1;
+                               goto done;
                        case -12: /* "remap" */
                                drive->remap_0_to_1 = 1;
                                goto done;
@@ -1774,8 +1782,9 @@ done:
        return 1;
 }
 
-extern void pnpide_init(void);
-extern void h8300_ide_init(void);
+extern void __init pnpide_init(void);
+extern void __exit pnpide_exit(void);
+extern void __init h8300_ide_init(void);
 
 /*
  * probe_for_hwifs() finds/initializes "known" IDE interfaces
@@ -1867,11 +1876,22 @@ void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
 {
        unsigned long flags;
        
-       down(&ide_setting_sem);
-       spin_lock_irqsave(&ide_lock, flags);
 #ifdef CONFIG_PROC_FS
        ide_remove_proc_entries(drive->proc, driver->proc);
 #endif
+       down(&ide_setting_sem);
+       spin_lock_irqsave(&ide_lock, flags);
+       /*
+        * ide_setting_sem protects the settings list
+        * ide_lock protects the use of settings
+        *
+        * so we need to hold both, ide_settings_sem because we want to
+        * modify the settings list, and ide_lock because we cannot take
+        * a setting out that is being used.
+        *
+        * OTOH both ide_{read,write}_setting are only ever used under
+        * ide_setting_sem.
+        */
        auto_remove_settings(drive);
        spin_unlock_irqrestore(&ide_lock, flags);
        up(&ide_setting_sem);
@@ -1995,11 +2015,16 @@ EXPORT_SYMBOL_GPL(ide_bus_type);
  */
 static int __init ide_init(void)
 {
+       int ret;
+
        printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
-       devfs_mk_dir("ide");
        system_bus_speed = ide_system_bus_speed();
 
-       bus_register(&ide_bus_type);
+       ret = bus_register(&ide_bus_type);
+       if (ret < 0) {
+               printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
+               return ret;
+       }
 
        init_ide_data();
 
@@ -2058,23 +2083,26 @@ static void __init parse_options (char *line)
        }
 }
 
-int init_module (void)
+int __init init_module (void)
 {
        parse_options(options);
        return ide_init();
 }
 
-void cleanup_module (void)
+void __exit cleanup_module (void)
 {
        int index;
 
        for (index = 0; index < MAX_HWIFS; ++index)
                ide_unregister(index);
 
+#ifdef CONFIG_BLK_DEV_IDEPNP
+       pnpide_exit();
+#endif
+
 #ifdef CONFIG_PROC_FS
        proc_ide_destroy();
 #endif
-       devfs_remove("ide");
 
        bus_unregister(&ide_bus_type);
 }