diff options
author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-10-10 22:39:28 +0200 |
---|---|---|
committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-10-10 22:39:28 +0200 |
commit | 8185d5aa93e0a5c111adc4952a5b87193a68ae5b (patch) | |
tree | 431aeb09a448b7b07a353e12f4fe931ebb8555cd /drivers/ide/ide-proc.c | |
parent | 263138a0ad6e38de7f6526b7de037ed4511308ef (diff) | |
download | kernel_samsung_smdk4412-8185d5aa93e0a5c111adc4952a5b87193a68ae5b.zip kernel_samsung_smdk4412-8185d5aa93e0a5c111adc4952a5b87193a68ae5b.tar.gz kernel_samsung_smdk4412-8185d5aa93e0a5c111adc4952a5b87193a68ae5b.tar.bz2 |
ide: /proc/ide/hd*/settings rework
* Add struct ide_devset, S_* flags, *DEVSET() & ide*_devset_*() macros.
* Add 'const struct ide_devset **settings' to ide_driver_t.
* Use 'const struct ide_devset **settings' in ide_drive_t instead of
'struct ide_settings_s *settings'. Then convert core code and device
drivers to use struct ide_devset and co.:
- device settings are no longer allocated dynamically for each device
but instead there is an unique struct ide_devset instance per setting
- device driver keeps the pointer to the table of pointers to its
settings in ide_driver_t.settings
- generic settings are kept in ide_generic_setting[]
- ide_proc_[un]register_driver(), ide_find_setting_by_name(),
ide_{read,write}_setting() and proc_ide_{read,write}_settings()
are updated accordingly
- ide*_add_settings() are removed
* Remove no longer used __ide_add_setting(), ide_add_setting(),
__ide_remove_setting() and auto_remove_settings().
* Remove no longer used TYPE_*, SETTING_*, ide_procset_t
and ide_settings_t.
* ->keep_settings, ->using_dma, ->unmask, ->noflush, ->dsc_overlap,
->nice1, ->addressing, ->wcache and ->nowerr ide_drive_t fields
can now be bitfield flags.
While at it:
* Rename ide_find_setting_by_name() to ide_find_setting().
* Rename write_wcache() to set_wcache().
There should be no functional changes caused by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ide-proc.c')
-rw-r--r-- | drivers/ide/ide-proc.c | 279 |
1 files changed, 87 insertions, 192 deletions
diff --git a/drivers/ide/ide-proc.c b/drivers/ide/ide-proc.c index 7a64aed..5634b39 100644 --- a/drivers/ide/ide-proc.c +++ b/drivers/ide/ide-proc.c @@ -114,140 +114,24 @@ static int proc_ide_read_identify } /** - * __ide_add_setting - add an ide setting option - * @drive: drive to use + * ide_find_setting - find a specific setting + * @st: setting table pointer * @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); - setting = (*p); - if (setting == 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 + * Scan's the 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) +static const struct ide_devset *ide_find_setting(const struct ide_devset **st, + char *name) { - ide_settings_t *setting = drive->settings; - - while (setting) { - if (strcmp(setting->name, name) == 0) + while (*st) { + if (strcmp((*st)->name, name) == 0) break; - setting = setting->next; + st++; } - return setting; + return *st; } /** @@ -263,26 +147,19 @@ static ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name) * be told apart */ -static int ide_read_setting(ide_drive_t *drive, ide_settings_t *setting) +static int ide_read_setting(ide_drive_t *drive, + const struct ide_devset *setting) { - int val = -EINVAL; - unsigned long flags; + int val = -EINVAL; + + if ((setting->flags & S_READ)) { + 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; - } + val = setting->get(drive); spin_unlock_irqrestore(&ide_lock, flags); } + return val; } @@ -304,33 +181,26 @@ static int ide_read_setting(ide_drive_t *drive, ide_settings_t *setting) * 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) +static int ide_write_setting(ide_drive_t *drive, + const struct ide_devset *setting, int val) { if (!capable(CAP_SYS_ADMIN)) return -EACCES; - if (setting->set) + if (setting->set && (setting->flags & S_NOLOCK)) return setting->set(drive, val); - if (!(setting->rw & SETTING_WRITE)) + if (!(setting->flags & S_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; - } + setting->set(drive, val); spin_unlock_irq(&ide_lock); return 0; } +static ide_devset_get(xfer_rate, current_speed); + static int set_xfer_rate (ide_drive_t *drive, int arg) { ide_task_t task; @@ -355,29 +225,30 @@ static int set_xfer_rate (ide_drive_t *drive, int arg) 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", 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, set_ksettings, 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", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->unmask, set_unmaskirq, 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); -} +ide_devset_rw_nolock(current_speed, 0, 70, xfer_rate); +ide_devset_rw_nolock(io_32bit, 0, 1 + (SUPPORT_VLB_SYNC << 1), io_32bit); +ide_devset_rw_nolock(keepsettings, 0, 1, ksettings); +ide_devset_rw_nolock(unmaskirq, 0, 1, unmaskirq); +ide_devset_rw_nolock(using_dma, 0, 1, using_dma); + +ide_devset_w_nolock(pio_mode, 0, 255, pio_mode); + +ide_devset_rw(init_speed, 0, 70, init_speed); +ide_devset_rw(nice1, 0, 1, nice1); +ide_devset_rw(number, 0, 3, dn); + +static const struct ide_devset *ide_generic_settings[] = { + &ide_devset_current_speed, + &ide_devset_init_speed, + &ide_devset_io_32bit, + &ide_devset_keepsettings, + &ide_devset_nice1, + &ide_devset_number, + &ide_devset_pio_mode, + &ide_devset_unmaskirq, + &ide_devset_using_dma, + NULL +}; static void proc_ide_settings_warn(void) { @@ -394,19 +265,31 @@ static void proc_ide_settings_warn(void) static int proc_ide_read_settings (char *page, char **start, off_t off, int count, int *eof, void *data) { + const struct ide_devset *setting, **g, **d; ide_drive_t *drive = (ide_drive_t *) data; - ide_settings_t *setting = (ide_settings_t *) drive->settings; char *out = page; int len, rc, mul_factor, div_factor; proc_ide_settings_warn(); mutex_lock(&ide_setting_mtx); + g = ide_generic_settings; + d = drive->settings; 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) { - mul_factor = setting->mul_factor; - div_factor = setting->div_factor; + while (*g || (d && *d)) { + /* read settings in the alphabetical order */ + if (*g && d && *d) { + if (strcmp((*d)->name, (*g)->name) < 0) + setting = *d++; + else + setting = *g++; + } else if (d && *d) { + setting = *d++; + } else + setting = *g++; + mul_factor = setting->mulf ? setting->mulf(drive) : 1; + div_factor = setting->divf ? setting->divf(drive) : 1; out += sprintf(out, "%-24s", setting->name); rc = ide_read_setting(drive, setting); if (rc >= 0) @@ -414,12 +297,11 @@ static int proc_ide_read_settings else out += sprintf(out, "%-16s", "write-only"); out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor); - if (setting->rw & SETTING_READ) + if (setting->flags & S_READ) out += sprintf(out, "r"); - if (setting->rw & SETTING_WRITE) + if (setting->flags & S_WRITE) out += sprintf(out, "w"); out += sprintf(out, "\n"); - setting = setting->next; } len = out - page; mutex_unlock(&ide_setting_mtx); @@ -433,9 +315,10 @@ static int proc_ide_write_settings(struct file *file, const char __user *buffer, { ide_drive_t *drive = (ide_drive_t *) data; char name[MAX_LEN + 1]; - int for_real = 0; + int for_real = 0, mul_factor, div_factor; unsigned long n; - ide_settings_t *setting; + + const struct ide_devset *setting; char *buf, *s; if (!capable(CAP_SYS_ADMIN)) @@ -503,13 +386,21 @@ static int proc_ide_write_settings(struct file *file, const char __user *buffer, } mutex_lock(&ide_setting_mtx); - setting = ide_find_setting_by_name(drive, name); + /* generic settings first, then driver specific ones */ + setting = ide_find_setting(ide_generic_settings, name); if (!setting) { - mutex_unlock(&ide_setting_mtx); - goto parse_error; + if (drive->settings) + setting = ide_find_setting(drive->settings, name); + if (!setting) { + mutex_unlock(&ide_setting_mtx); + goto parse_error; + } + } + if (for_real) { + mul_factor = setting->mulf ? setting->mulf(drive) : 1; + div_factor = setting->divf ? setting->divf(drive) : 1; + ide_write_setting(drive, setting, val * div_factor / mul_factor); } - if (for_real) - ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor); mutex_unlock(&ide_setting_mtx); } } while (!for_real++); @@ -680,6 +571,10 @@ static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { + mutex_lock(&ide_setting_mtx); + drive->settings = driver->settings; + mutex_unlock(&ide_setting_mtx); + ide_add_proc_entries(drive->proc, driver->proc, drive); } @@ -716,7 +611,7 @@ void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) * OTOH both ide_{read,write}_setting are only ever used under * ide_setting_mtx. */ - auto_remove_settings(drive); + drive->settings = NULL; spin_unlock_irqrestore(&ide_lock, flags); mutex_unlock(&ide_setting_mtx); } |