X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fide%2Fide-proc.c;h=fc1d8ae6a80381d08937faf4dc5d2fd687d33c7c;hb=547307420931344a868275bd7ea7a30f117a15a9;hp=afb71c66b6f3f94e0517cc641feb01db0a1715b6;hpb=920841d8d1d61bc12b43f95a579a5374f6d98f81;p=linux-2.6-omap-h63xx.git diff --git a/drivers/ide/ide-proc.c b/drivers/ide/ide-proc.c index afb71c66b6f..fc1d8ae6a80 100644 --- a/drivers/ide/ide-proc.c +++ b/drivers/ide/ide-proc.c @@ -3,6 +3,8 @@ * * Copyright (C) 1997-1998 Mark Lord * Copyright (C) 2003 Red Hat + * + * Some code was moved here from ide.c, see it for original copyrights. */ /* @@ -37,6 +39,8 @@ #include +static struct proc_dir_entry *proc_ide_root; + static int proc_ide_read_imodel (char *page, char **start, off_t off, int count, int *eof, void *data) { @@ -63,6 +67,8 @@ static int proc_ide_read_imodel case ide_4drives: name = "4drives"; break; case ide_pmac: name = "mac-io"; break; case ide_au1xxx: name = "au1xxx"; break; + case ide_etrax100: name = "etrax100"; break; + case ide_acorn: name = "acorn"; break; default: name = "(unknown)"; break; } len = sprintf(page, "%s\n", name); @@ -121,6 +127,265 @@ static int proc_ide_read_identify PROC_IDE_READ_RETURN(page,start,off,count,eof,len); } +/** + * __ide_add_setting - add an ide setting option + * @drive: drive to use + * @name: setting name + * @rw: true if the function is read write + * @data_type: type of data + * @min: range minimum + * @max: range maximum + * @mul_factor: multiplication scale + * @div_factor: divison scale + * @data: private data field + * @set: setting + * @auto_remove: setting auto removal flag + * + * Removes the setting named from the device if it is present. + * The function takes the settings_lock to protect against + * parallel changes. This function must not be called from IRQ + * context. Returns 0 on success or -1 on failure. + * + * BUGS: This code is seriously over-engineered. There is also + * magic about how the driver specific features are setup. If + * a driver is attached we assume the driver settings are auto + * remove. + */ + +static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove) +{ + ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL; + + mutex_lock(&ide_setting_mtx); + while ((*p) && strcmp((*p)->name, name) < 0) + p = &((*p)->next); + if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL) + goto abort; + if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL) + goto abort; + strcpy(setting->name, name); + setting->rw = rw; + setting->data_type = data_type; + setting->min = min; + setting->max = max; + setting->mul_factor = mul_factor; + setting->div_factor = div_factor; + setting->data = data; + setting->set = set; + + setting->next = *p; + if (auto_remove) + setting->auto_remove = 1; + *p = setting; + mutex_unlock(&ide_setting_mtx); + return 0; +abort: + mutex_unlock(&ide_setting_mtx); + kfree(setting); + return -1; +} + +int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set) +{ + return __ide_add_setting(drive, name, rw, data_type, min, max, mul_factor, div_factor, data, set, 1); +} + +EXPORT_SYMBOL(ide_add_setting); + +/** + * __ide_remove_setting - remove an ide setting option + * @drive: drive to use + * @name: setting name + * + * Removes the setting named from the device if it is present. + * The caller must hold the setting semaphore. + */ + +static void __ide_remove_setting (ide_drive_t *drive, char *name) +{ + ide_settings_t **p, *setting; + + p = (ide_settings_t **) &drive->settings; + + while ((*p) && strcmp((*p)->name, name)) + p = &((*p)->next); + if ((setting = (*p)) == NULL) + return; + + (*p) = setting->next; + + kfree(setting->name); + kfree(setting); +} + +/** + * auto_remove_settings - remove driver specific settings + * @drive: drive + * + * Automatically remove all the driver specific settings for this + * drive. This function may not be called from IRQ context. The + * caller must hold ide_setting_mtx. + */ + +static void auto_remove_settings (ide_drive_t *drive) +{ + ide_settings_t *setting; +repeat: + setting = drive->settings; + while (setting) { + if (setting->auto_remove) { + __ide_remove_setting(drive, setting->name); + goto repeat; + } + setting = setting->next; + } +} + +/** + * ide_find_setting_by_name - find a drive specific setting + * @drive: drive to scan + * @name: setting name + * + * Scan's the device setting table for a matching entry and returns + * this or NULL if no entry is found. The caller must hold the + * setting semaphore + */ + +static ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name) +{ + ide_settings_t *setting = drive->settings; + + while (setting) { + if (strcmp(setting->name, name) == 0) + break; + setting = setting->next; + } + return setting; +} + +/** + * ide_read_setting - read an IDE setting + * @drive: drive to read from + * @setting: drive setting + * + * Read a drive setting and return the value. The caller + * must hold the ide_setting_mtx when making this call. + * + * BUGS: the data return and error are the same return value + * so an error -EINVAL and true return of the same value cannot + * be told apart + */ + +static int ide_read_setting(ide_drive_t *drive, ide_settings_t *setting) +{ + int val = -EINVAL; + unsigned long flags; + + if ((setting->rw & SETTING_READ)) { + spin_lock_irqsave(&ide_lock, flags); + switch(setting->data_type) { + case TYPE_BYTE: + val = *((u8 *) setting->data); + break; + case TYPE_SHORT: + val = *((u16 *) setting->data); + break; + case TYPE_INT: + val = *((u32 *) setting->data); + break; + } + spin_unlock_irqrestore(&ide_lock, flags); + } + return val; +} + +/** + * ide_write_setting - read an IDE setting + * @drive: drive to read from + * @setting: drive setting + * @val: value + * + * Write a drive setting if it is possible. The caller + * must hold the ide_setting_mtx when making this call. + * + * BUGS: the data return and error are the same return value + * so an error -EINVAL and true return of the same value cannot + * be told apart + * + * FIXME: This should be changed to enqueue a special request + * to the driver to change settings, and then wait on a sema for completion. + * The current scheme of polling is kludgy, though safe enough. + */ + +static int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val) +{ + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + if (setting->set) + return setting->set(drive, val); + if (!(setting->rw & SETTING_WRITE)) + return -EPERM; + if (val < setting->min || val > setting->max) + return -EINVAL; + if (ide_spin_wait_hwgroup(drive)) + return -EBUSY; + switch (setting->data_type) { + case TYPE_BYTE: + *((u8 *) setting->data) = val; + break; + case TYPE_SHORT: + *((u16 *) setting->data) = val; + break; + case TYPE_INT: + *((u32 *) setting->data) = val; + break; + } + spin_unlock_irq(&ide_lock); + return 0; +} + +static int set_xfer_rate (ide_drive_t *drive, int arg) +{ + int err; + + if (arg < 0 || arg > 70) + return -EINVAL; + + err = ide_wait_cmd(drive, + WIN_SETFEATURES, (u8) arg, + SETFEATURES_XFER, 0, NULL); + + if (!err && arg) { + ide_set_xfer_rate(drive, (u8) arg); + ide_driveid_update(drive); + } + return err; +} + +/** + * ide_add_generic_settings - generic ide settings + * @drive: drive being configured + * + * Add the generic parts of the system settings to the /proc files. + * The caller must not be holding the ide_setting_mtx. + */ + +void ide_add_generic_settings (ide_drive_t *drive) +{ +/* + * drive setting name read/write access data type min max mul_factor div_factor data pointer set function + */ + __ide_add_setting(drive, "io_32bit", drive->no_io_32bit ? SETTING_READ : SETTING_RW, TYPE_BYTE, 0, 1 + (SUPPORT_VLB_SYNC << 1), 1, 1, &drive->io_32bit, set_io_32bit, 0); + __ide_add_setting(drive, "keepsettings", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0); + __ide_add_setting(drive, "nice1", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0); + __ide_add_setting(drive, "pio_mode", SETTING_WRITE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0); + __ide_add_setting(drive, "unmaskirq", drive->no_unmask ? SETTING_READ : SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->unmask, NULL, 0); + __ide_add_setting(drive, "using_dma", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->using_dma, set_using_dma, 0); + __ide_add_setting(drive, "init_speed", SETTING_RW, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0); + __ide_add_setting(drive, "current_speed", SETTING_RW, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0); + __ide_add_setting(drive, "number", SETTING_RW, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0); +} + static void proc_ide_settings_warn(void) { static int warned = 0; @@ -143,7 +408,7 @@ static int proc_ide_read_settings proc_ide_settings_warn(); - down(&ide_setting_sem); + mutex_lock(&ide_setting_mtx); out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n"); out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n"); while(setting) { @@ -163,7 +428,7 @@ static int proc_ide_read_settings setting = setting->next; } len = out - page; - up(&ide_setting_sem); + mutex_unlock(&ide_setting_mtx); PROC_IDE_READ_RETURN(page,start,off,count,eof,len); } @@ -243,16 +508,16 @@ static int proc_ide_write_settings(struct file *file, const char __user *buffer, ++p; } - down(&ide_setting_sem); + mutex_lock(&ide_setting_mtx); setting = ide_find_setting_by_name(drive, name); if (!setting) { - up(&ide_setting_sem); + mutex_unlock(&ide_setting_mtx); goto parse_error; } if (for_real) ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor); - up(&ide_setting_sem); + mutex_unlock(&ide_setting_mtx); } } while (!for_real++); free_page((unsigned long)buf); @@ -310,14 +575,12 @@ static int proc_ide_read_driver ide_driver_t *ide_drv; int len; - down_read(&dev->bus->subsys.rwsem); if (dev->driver) { ide_drv = container_of(dev->driver, ide_driver_t, gen_driver); len = sprintf(page, "%s version %s\n", dev->driver->name, ide_drv->version); } else len = sprintf(page, "ide-default version 0.9.newide\n"); - up_read(&dev->bus->subsys.rwsem); PROC_IDE_READ_RETURN(page,start,off,count,eof,len); } @@ -327,7 +590,6 @@ static int ide_replace_subdriver(ide_drive_t *drive, const char *driver) int ret = 1; int err; - down_write(&dev->bus->subsys.rwsem); device_release_driver(dev); /* FIXME: device can still be in use by previous driver */ strlcpy(drive->driver_req, driver, sizeof(drive->driver_req)); @@ -345,7 +607,6 @@ static int ide_replace_subdriver(ide_drive_t *drive, const char *driver) } if (dev->driver && !strcmp(dev->driver->name, driver)) ret = 0; - up_write(&dev->bus->subsys.rwsem); return ret; } @@ -403,7 +664,7 @@ static ide_proc_entry_t generic_drive_entries[] = { { NULL, 0, NULL, NULL } }; -void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data) +static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data) { struct proc_dir_entry *ent; @@ -419,7 +680,7 @@ void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void } } -void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p) +static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p) { if (!dir || !p) return; @@ -429,6 +690,51 @@ void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p) } } +void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) +{ + ide_add_proc_entries(drive->proc, driver->proc, drive); +} + +EXPORT_SYMBOL(ide_proc_register_driver); + +/** + * ide_proc_unregister_driver - remove driver specific data + * @drive: drive + * @driver: driver + * + * Clean up the driver specific /proc files and IDE settings + * for a given drive. + * + * Takes ide_setting_mtx and ide_lock. + * Caller must hold none of the locks. + */ + +void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) +{ + unsigned long flags; + + ide_remove_proc_entries(drive->proc, driver->proc); + + mutex_lock(&ide_setting_mtx); + spin_lock_irqsave(&ide_lock, flags); + /* + * ide_setting_mtx 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_mtx. + */ + auto_remove_settings(drive); + spin_unlock_irqrestore(&ide_lock, flags); + mutex_unlock(&ide_setting_mtx); +} + +EXPORT_SYMBOL(ide_proc_unregister_driver); + static void create_proc_ide_drives(ide_hwif_t *hwif) { int d; @@ -481,26 +787,24 @@ static ide_proc_entry_t hwif_entries[] = { { NULL, 0, NULL, NULL } }; -void create_proc_ide_interfaces(void) +void ide_proc_register_port(ide_hwif_t *hwif) { - int h; + if (!hwif->present) + return; - for (h = 0; h < MAX_HWIFS; h++) { - ide_hwif_t *hwif = &ide_hwifs[h]; + if (!hwif->proc) { + hwif->proc = proc_mkdir(hwif->name, proc_ide_root); - if (!hwif->present) - continue; - if (!hwif->proc) { - hwif->proc = proc_mkdir(hwif->name, proc_ide_root); - if (!hwif->proc) - return; - ide_add_proc_entries(hwif->proc, hwif_entries, hwif); - } - create_proc_ide_drives(hwif); + if (!hwif->proc) + return; + + ide_add_proc_entries(hwif->proc, hwif_entries, hwif); } + + create_proc_ide_drives(hwif); } -EXPORT_SYMBOL(create_proc_ide_interfaces); +EXPORT_SYMBOL_GPL(ide_proc_register_port); #ifdef CONFIG_BLK_DEV_IDEPCI void ide_pci_create_host_proc(const char *name, get_info_t *get_info) @@ -511,7 +815,7 @@ void ide_pci_create_host_proc(const char *name, get_info_t *get_info) EXPORT_SYMBOL_GPL(ide_pci_create_host_proc); #endif -void destroy_proc_ide_interface(ide_hwif_t *hwif) +void ide_proc_unregister_port(ide_hwif_t *hwif) { if (hwif->proc) { destroy_proc_ide_drives(hwif); @@ -558,11 +862,11 @@ void proc_ide_create(void) { struct proc_dir_entry *entry; + proc_ide_root = proc_mkdir("ide", NULL); + if (!proc_ide_root) return; - create_proc_ide_interfaces(); - entry = create_proc_entry("drivers", 0, proc_ide_root); if (entry) entry->proc_fops = &ide_drivers_operations;