include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[linux-3.10.git] / drivers / ide / ide.c
index 78776bb..3cb9c4e 100644 (file)
@@ -52,7 +52,6 @@
 #include <linux/major.h>
 #include <linux/errno.h>
 #include <linux/genhd.h>
-#include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/pci.h>
 #include <linux/ide.h>
 #include <linux/completion.h>
 #include <linux/device.h>
 
-
-/* default maximum number of failures */
-#define IDE_DEFAULT_MAX_FAILURES       1
-
 struct class *ide_port_class;
 
-static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
-                                       IDE2_MAJOR, IDE3_MAJOR,
-                                       IDE4_MAJOR, IDE5_MAJOR,
-                                       IDE6_MAJOR, IDE7_MAJOR,
-                                       IDE8_MAJOR, IDE9_MAJOR };
-
-DEFINE_MUTEX(ide_cfg_mtx);
-
-__cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
-EXPORT_SYMBOL(ide_lock);
-
-static void ide_port_init_devices_data(ide_hwif_t *);
-
-/*
- * Do not even *think* about calling this!
- */
-void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
-{
-       /* bulk initialize hwif & drive info with zeros */
-       memset(hwif, 0, sizeof(ide_hwif_t));
-
-       /* fill in any non-zero initial values */
-       hwif->index     = index;
-       hwif->major     = ide_hwif_to_major[index];
-
-       hwif->name[0]   = 'i';
-       hwif->name[1]   = 'd';
-       hwif->name[2]   = 'e';
-       hwif->name[3]   = '0' + index;
-
-       init_completion(&hwif->gendev_rel_comp);
-
-       hwif->tp_ops = &default_tp_ops;
-
-       ide_port_init_devices_data(hwif);
-}
-
-static void ide_port_init_devices_data(ide_hwif_t *hwif)
-{
-       int unit;
-
-       for (unit = 0; unit < MAX_DRIVES; ++unit) {
-               ide_drive_t *drive = &hwif->drives[unit];
-               u8 j = (hwif->index * MAX_DRIVES) + unit;
-
-               memset(drive, 0, sizeof(*drive));
-
-               drive->media                    = ide_disk;
-               drive->select.all               = (unit<<4)|0xa0;
-               drive->hwif                     = hwif;
-               drive->ready_stat               = ATA_DRDY;
-               drive->bad_wstat                = BAD_W_STAT;
-               drive->special.b.recalibrate    = 1;
-               drive->special.b.set_geometry   = 1;
-               drive->name[0]                  = 'h';
-               drive->name[1]                  = 'd';
-               drive->name[2]                  = 'a' + j;
-               drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
-
-               INIT_LIST_HEAD(&drive->list);
-               init_completion(&drive->gendev_rel_comp);
-       }
-}
-
-/* Called with ide_lock held. */
-static void __ide_port_unregister_devices(ide_hwif_t *hwif)
-{
-       int i;
-
-       for (i = 0; i < MAX_DRIVES; i++) {
-               ide_drive_t *drive = &hwif->drives[i];
-
-               if (drive->dev_flags & IDE_DFLAG_PRESENT) {
-                       spin_unlock_irq(&ide_lock);
-                       device_unregister(&drive->gendev);
-                       wait_for_completion(&drive->gendev_rel_comp);
-                       spin_lock_irq(&ide_lock);
-               }
-       }
-}
-
-void ide_port_unregister_devices(ide_hwif_t *hwif)
-{
-       mutex_lock(&ide_cfg_mtx);
-       spin_lock_irq(&ide_lock);
-       __ide_port_unregister_devices(hwif);
-       hwif->present = 0;
-       ide_port_init_devices_data(hwif);
-       spin_unlock_irq(&ide_lock);
-       mutex_unlock(&ide_cfg_mtx);
-}
-EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
-
-/**
- *     ide_unregister          -       free an IDE interface
- *     @hwif: IDE interface
- *
- *     Perform the final unregister of an IDE interface. At the moment
- *     we don't refcount interfaces so this will also get split up.
- *
- *     Locking:
- *     The caller must not hold the IDE locks
- *     The drive present/vanishing is not yet properly locked
- *     Take care with the callbacks. These have been split to avoid
- *     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 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.
- *     This is raving bonkers.
- */
-
-void ide_unregister(ide_hwif_t *hwif)
-{
-       ide_hwif_t *g;
-       ide_hwgroup_t *hwgroup;
-       int irq_count = 0;
-
-       BUG_ON(in_interrupt());
-       BUG_ON(irqs_disabled());
-
-       mutex_lock(&ide_cfg_mtx);
-
-       spin_lock_irq(&ide_lock);
-       if (hwif->present) {
-               __ide_port_unregister_devices(hwif);
-               hwif->present = 0;
-       }
-       spin_unlock_irq(&ide_lock);
-
-       ide_proc_unregister_port(hwif);
-
-       hwgroup = hwif->hwgroup;
-       /*
-        * free the irq if we were the only hwif using it
-        */
-       g = hwgroup->hwif;
-       do {
-               if (g->irq == hwif->irq)
-                       ++irq_count;
-               g = g->next;
-       } while (g != hwgroup->hwif);
-       if (irq_count == 1)
-               free_irq(hwif->irq, hwgroup);
-
-       ide_remove_port_from_hwgroup(hwif);
-
-       device_unregister(hwif->portdev);
-       device_unregister(&hwif->gendev);
-       wait_for_completion(&hwif->gendev_rel_comp);
-
-       /*
-        * Remove us from the kernel's knowledge
-        */
-       blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
-       kfree(hwif->sg_table);
-       unregister_blkdev(hwif->major, hwif->name);
-
-       if (hwif->dma_base)
-               ide_release_dma_engine(hwif);
-
-       mutex_unlock(&ide_cfg_mtx);
-}
-
-void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
-{
-       memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
-       hwif->irq = hw->irq;
-       hwif->chipset = hw->chipset;
-       hwif->dev = hw->dev;
-       hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
-       hwif->ack_intr = hw->ack_intr;
-       hwif->config_data = hw->config;
-}
-
-/*
- *     Locks for IDE setting functionality
- */
-
-DEFINE_MUTEX(ide_setting_mtx);
-
-ide_devset_get(io_32bit, io_32bit);
-
-static int set_io_32bit(ide_drive_t *drive, int arg)
-{
-       if (drive->dev_flags & IDE_DFLAG_NO_IO_32BIT)
-               return -EPERM;
-
-       if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
-               return -EINVAL;
-
-       drive->io_32bit = arg;
-
-       return 0;
-}
-
-ide_devset_get_flag(ksettings, IDE_DFLAG_KEEP_SETTINGS);
-
-static int set_ksettings(ide_drive_t *drive, int arg)
-{
-       if (arg < 0 || arg > 1)
-               return -EINVAL;
-
-       if (arg)
-               drive->dev_flags |= IDE_DFLAG_KEEP_SETTINGS;
-       else
-               drive->dev_flags &= ~IDE_DFLAG_KEEP_SETTINGS;
-
-       return 0;
-}
-
-ide_devset_get_flag(using_dma, IDE_DFLAG_USING_DMA);
-
-static int set_using_dma(ide_drive_t *drive, int arg)
-{
-#ifdef CONFIG_BLK_DEV_IDEDMA
-       int err = -EPERM;
-
-       if (arg < 0 || arg > 1)
-               return -EINVAL;
-
-       if (ata_id_has_dma(drive->id) == 0)
-               goto out;
-
-       if (drive->hwif->dma_ops == NULL)
-               goto out;
-
-       err = 0;
-
-       if (arg) {
-               if (ide_set_dma(drive))
-                       err = -EIO;
-       } else
-               ide_dma_off(drive);
-
-out:
-       return err;
-#else
-       if (arg < 0 || arg > 1)
-               return -EINVAL;
-
-       return -EPERM;
-#endif
-}
-
-static int set_pio_mode(ide_drive_t *drive, int arg)
-{
-       struct request *rq;
-       ide_hwif_t *hwif = drive->hwif;
-       const struct ide_port_ops *port_ops = hwif->port_ops;
-
-       if (arg < 0 || arg > 255)
-               return -EINVAL;
-
-       if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
-           (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
-               return -ENOSYS;
-
-       if (drive->special.b.set_tune)
-               return -EBUSY;
-
-       rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
-       rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
-
-       drive->tune_req = (u8) arg;
-       drive->special.b.set_tune = 1;
-
-       blk_execute_rq(drive->queue, NULL, rq, 0);
-       blk_put_request(rq);
-
-       return 0;
-}
-
-ide_devset_get_flag(unmaskirq, IDE_DFLAG_UNMASK);
-
-static int set_unmaskirq(ide_drive_t *drive, int arg)
-{
-       if (drive->dev_flags & IDE_DFLAG_NO_UNMASK)
-               return -EPERM;
-
-       if (arg < 0 || arg > 1)
-               return -EINVAL;
-
-       if (arg)
-               drive->dev_flags |= IDE_DFLAG_UNMASK;
-       else
-               drive->dev_flags &= ~IDE_DFLAG_UNMASK;
-
-       return 0;
-}
-
-#define ide_gen_devset_rw(_name, _func) \
-__IDE_DEVSET(_name, DS_SYNC, get_##_func, set_##_func)
-
-ide_gen_devset_rw(io_32bit, io_32bit);
-ide_gen_devset_rw(keepsettings, ksettings);
-ide_gen_devset_rw(unmaskirq, unmaskirq);
-ide_gen_devset_rw(using_dma, using_dma);
-__IDE_DEVSET(pio_mode, 0, NULL, set_pio_mode);
-
-static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
-{
-       ide_drive_t *drive = dev->driver_data, *pair = ide_get_pair_dev(drive);
-       ide_hwif_t *hwif = HWIF(drive);
-       struct request *rq;
-       struct request_pm_state rqpm;
-       ide_task_t args;
-       int ret;
-
-       /* call ACPI _GTM only once */
-       if ((drive->dn & 1) == 0 || pair == NULL)
-               ide_acpi_get_timing(hwif);
-
-       memset(&rqpm, 0, sizeof(rqpm));
-       memset(&args, 0, sizeof(args));
-       rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
-       rq->cmd_type = REQ_TYPE_PM_SUSPEND;
-       rq->special = &args;
-       rq->data = &rqpm;
-       rqpm.pm_step = ide_pm_state_start_suspend;
-       if (mesg.event == PM_EVENT_PRETHAW)
-               mesg.event = PM_EVENT_FREEZE;
-       rqpm.pm_state = mesg.event;
-
-       ret = blk_execute_rq(drive->queue, NULL, rq, 0);
-       blk_put_request(rq);
-
-       /* call ACPI _PS3 only after both devices are suspended */
-       if (ret == 0 && ((drive->dn & 1) || pair == NULL))
-               ide_acpi_set_state(hwif, 0);
-
-       return ret;
-}
-
-static int generic_ide_resume(struct device *dev)
-{
-       ide_drive_t *drive = dev->driver_data, *pair = ide_get_pair_dev(drive);
-       ide_hwif_t *hwif = HWIF(drive);
-       struct request *rq;
-       struct request_pm_state rqpm;
-       ide_task_t args;
-       int err;
-
-       /* call ACPI _PS0 / _STM only once */
-       if ((drive->dn & 1) == 0 || pair == NULL) {
-               ide_acpi_set_state(hwif, 1);
-               ide_acpi_push_timing(hwif);
-       }
-
-       ide_acpi_exec_tfs(drive);
-
-       memset(&rqpm, 0, sizeof(rqpm));
-       memset(&args, 0, sizeof(args));
-       rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
-       rq->cmd_type = REQ_TYPE_PM_RESUME;
-       rq->cmd_flags |= REQ_PREEMPT;
-       rq->special = &args;
-       rq->data = &rqpm;
-       rqpm.pm_step = ide_pm_state_start_resume;
-       rqpm.pm_state = PM_EVENT_ON;
-
-       err = blk_execute_rq(drive->queue, NULL, rq, 1);
-       blk_put_request(rq);
-
-       if (err == 0 && dev->driver) {
-               ide_driver_t *drv = to_ide_driver(dev->driver);
-
-               if (drv->resume)
-                       drv->resume(drive);
-       }
-
-       return err;
-}
-
 /**
  * ide_device_get      -       get an additional reference to a ide_drive_t
  * @drive:     device to get a reference to
@@ -495,87 +113,20 @@ static int ide_bus_match(struct device *dev, struct device_driver *drv)
        return 1;
 }
 
-static char *media_string(ide_drive_t *drive)
-{
-       switch (drive->media) {
-       case ide_disk:
-               return "disk";
-       case ide_cdrom:
-               return "cdrom";
-       case ide_tape:
-               return "tape";
-       case ide_floppy:
-               return "floppy";
-       case ide_optical:
-               return "optical";
-       default:
-               return "UNKNOWN";
-       }
-}
-
-static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
-       ide_drive_t *drive = to_ide_device(dev);
-       return sprintf(buf, "%s\n", media_string(drive));
-}
-
-static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
-       ide_drive_t *drive = to_ide_device(dev);
-       return sprintf(buf, "%s\n", drive->name);
-}
-
-static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
-       ide_drive_t *drive = to_ide_device(dev);
-       return sprintf(buf, "ide:m-%s\n", media_string(drive));
-}
-
-static ssize_t model_show(struct device *dev, struct device_attribute *attr,
-                         char *buf)
-{
-       ide_drive_t *drive = to_ide_device(dev);
-       return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_PROD]);
-}
-
-static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
-                            char *buf)
-{
-       ide_drive_t *drive = to_ide_device(dev);
-       return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_FW_REV]);
-}
-
-static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
-                          char *buf)
-{
-       ide_drive_t *drive = to_ide_device(dev);
-       return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_SERNO]);
-}
-
-static struct device_attribute ide_dev_attrs[] = {
-       __ATTR_RO(media),
-       __ATTR_RO(drivename),
-       __ATTR_RO(modalias),
-       __ATTR_RO(model),
-       __ATTR_RO(firmware),
-       __ATTR(serial, 0400, serial_show, NULL),
-       __ATTR_NULL
-};
-
 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
        ide_drive_t *drive = to_ide_device(dev);
 
-       add_uevent_var(env, "MEDIA=%s", media_string(drive));
+       add_uevent_var(env, "MEDIA=%s", ide_media_string(drive));
        add_uevent_var(env, "DRIVENAME=%s", drive->name);
-       add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
+       add_uevent_var(env, "MODALIAS=ide:m-%s", ide_media_string(drive));
        return 0;
 }
 
 static int generic_ide_probe(struct device *dev)
 {
        ide_drive_t *drive = to_ide_device(dev);
-       ide_driver_t *drv = to_ide_driver(dev->driver);
+       struct ide_driver *drv = to_ide_driver(dev->driver);
 
        return drv->probe ? drv->probe(drive) : -ENODEV;
 }
@@ -583,7 +134,7 @@ static int generic_ide_probe(struct device *dev)
 static int generic_ide_remove(struct device *dev)
 {
        ide_drive_t *drive = to_ide_device(dev);
-       ide_driver_t *drv = to_ide_driver(dev->driver);
+       struct ide_driver *drv = to_ide_driver(dev->driver);
 
        if (drv->remove)
                drv->remove(drive);
@@ -594,7 +145,7 @@ static int generic_ide_remove(struct device *dev)
 static void generic_ide_shutdown(struct device *dev)
 {
        ide_drive_t *drive = to_ide_device(dev);
-       ide_driver_t *drv = to_ide_driver(dev->driver);
+       struct ide_driver *drv = to_ide_driver(dev->driver);
 
        if (dev->driver && drv->shutdown)
                drv->shutdown(drive);
@@ -631,6 +182,7 @@ static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
        int a, b, i, j = 1;
        unsigned int *dev_param_mask = (unsigned int *)kp->arg;
 
+       /* controller . device (0 or 1) [ : 1 (set) | 0 (clear) ] */
        if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
            sscanf(s, "%d.%d", &a, &b) != 2)
                return -EINVAL;
@@ -643,7 +195,7 @@ static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
        if (j)
                *dev_param_mask |= (1 << i);
        else
-               *dev_param_mask &= (1 << i);
+               *dev_param_mask &= ~(1 << i);
 
        return 0;
 }
@@ -658,6 +210,11 @@ static unsigned int ide_noflush;
 module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
 MODULE_PARM_DESC(noflush, "disable flush requests for a device");
 
+static unsigned int ide_nohpa;
+
+module_param_call(nohpa, ide_set_dev_param_mask, NULL, &ide_nohpa, 0);
+MODULE_PARM_DESC(nohpa, "disable Host Protected Area for a device");
+
 static unsigned int ide_noprobe;
 
 module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
@@ -686,6 +243,8 @@ static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
 {
        int a, b, c = 0, h = 0, s = 0, i, j = 1;
 
+       /* controller . device (0 or 1) : Cylinders , Heads , Sectors */
+       /* controller . device (0 or 1) : 1 (use CHS) | 0 (ignore CHS) */
        if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
            sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
                return -EINVAL;
@@ -701,7 +260,7 @@ static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
        if (j)
                ide_disks |= (1 << i);
        else
-               ide_disks &= (1 << i);
+               ide_disks &= ~(1 << i);
 
        ide_disks_chs[i].cyl  = c;
        ide_disks_chs[i].head = h;
@@ -713,9 +272,9 @@ static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
 module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
 MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
 
-static void ide_dev_apply_params(ide_drive_t *drive)
+static void ide_dev_apply_params(ide_drive_t *drive, u8 unit)
 {
-       int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
+       int i = drive->hwif->index * MAX_DRIVES + unit;
 
        if (ide_nodma & (1 << i)) {
                printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
@@ -726,6 +285,11 @@ static void ide_dev_apply_params(ide_drive_t *drive)
                                 drive->name);
                drive->dev_flags |= IDE_DFLAG_NOFLUSH;
        }
+       if (ide_nohpa & (1 << i)) {
+               printk(KERN_INFO "ide: disabling Host Protected Area for %s\n",
+                                drive->name);
+               drive->dev_flags |= IDE_DFLAG_NOHPA;
+       }
        if (ide_noprobe & (1 << i)) {
                printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
                drive->dev_flags |= IDE_DFLAG_NOPROBE;
@@ -763,6 +327,8 @@ static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
 {
        int i, j = 1;
 
+       /* controller (ignore) */
+       /* controller : 1 (ignore) | 0 (use) */
        if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
                return -EINVAL;
 
@@ -772,7 +338,7 @@ static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
        if (j)
                ide_ignore_cable |= (1 << i);
        else
-               ide_ignore_cable &= (1 << i);
+               ide_ignore_cable &= ~(1 << i);
 
        return 0;
 }
@@ -782,6 +348,7 @@ MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
 
 void ide_port_apply_params(ide_hwif_t *hwif)
 {
+       ide_drive_t *drive;
        int i;
 
        if (ide_ignore_cable & (1 << hwif->index)) {
@@ -790,8 +357,8 @@ void ide_port_apply_params(ide_hwif_t *hwif)
                hwif->cbl = ATA_CBL_PATA40_SHORT;
        }
 
-       for (i = 0; i < MAX_DRIVES; i++)
-               ide_dev_apply_params(&hwif->drives[i]);
+       ide_port_for_each_dev(i, drive, hwif)
+               ide_dev_apply_params(drive, i);
 }
 
 /*
@@ -815,6 +382,8 @@ static int __init ide_init(void)
                goto out_port_class;
        }
 
+       ide_acpi_init();
+
        proc_ide_create();
 
        return 0;