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: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 263138a0
......@@ -1809,13 +1809,12 @@ static ide_proc_entry_t idecd_proc[] = {
{ NULL, 0, NULL, NULL }
};
static void ide_cdrom_add_settings(ide_drive_t *drive)
{
ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
&drive->dsc_overlap, NULL);
}
#else
static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
ide_devset_rw(dsc_overlap, 0, 1, dsc_overlap);
static const struct ide_devset *idecd_settings[] = {
&ide_devset_dsc_overlap,
NULL
};
#endif
static const struct cd_list_entry ide_cd_quirks_list[] = {
......@@ -1926,7 +1925,6 @@ static int ide_cdrom_setup(ide_drive_t *drive)
}
ide_proc_register_driver(drive, cd->driver);
ide_cdrom_add_settings(drive);
return 0;
}
......@@ -1977,6 +1975,7 @@ static ide_driver_t ide_cdrom_driver = {
.error = __ide_error,
#ifdef CONFIG_IDE_PROC_FS
.proc = idecd_proc,
.settings = idecd_settings,
#endif
};
......
......@@ -599,6 +599,8 @@ static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
rq->special = task;
}
ide_devset_get(multcount, mult_count);
/*
* This is tightly woven into the driver->do_special can not touch.
* DON'T do it again until a total personality rewrite is committed.
......@@ -625,6 +627,8 @@ static int set_multcount(ide_drive_t *drive, int arg)
return (drive->mult_count == arg) ? 0 : -EIO;
}
ide_devset_get(nowerr, nowerr);
static int set_nowerr(ide_drive_t *drive, int arg)
{
if (arg < 0 || arg > 1)
......@@ -673,7 +677,9 @@ static void update_ordered(ide_drive_t *drive)
blk_queue_ordered(drive->queue, ordered, prep_fn);
}
static int write_cache(ide_drive_t *drive, int arg)
ide_devset_get(wcache, wcache);
static int set_wcache(ide_drive_t *drive, int arg)
{
ide_task_t args;
int err = 1;
......@@ -710,6 +716,8 @@ static int do_idedisk_flushcache(ide_drive_t *drive)
return ide_no_data_taskfile(drive, &args);
}
ide_devset_get(acoustic, acoustic);
static int set_acoustic(ide_drive_t *drive, int arg)
{
ide_task_t args;
......@@ -727,6 +735,8 @@ static int set_acoustic(ide_drive_t *drive, int arg)
return 0;
}
ide_devset_get(lba_addressing, addressing);
/*
* drive->addressing:
* 0: 28-bit
......@@ -750,33 +760,33 @@ static int set_lba_addressing(ide_drive_t *drive, int arg)
}
#ifdef CONFIG_IDE_PROC_FS
static void idedisk_add_settings(ide_drive_t *drive)
{
ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 65535, 1, 1,
&drive->bios_cyl, NULL);
ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
&drive->bios_head, NULL);
ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1,
&drive->bios_sect, NULL);
ide_add_setting(drive, "address", SETTING_RW, TYPE_BYTE, 0, 2, 1, 1,
&drive->addressing, set_lba_addressing);
ide_add_setting(drive, "multcount", SETTING_RW, TYPE_BYTE, 0, 16, 1, 1,
&drive->mult_count, set_multcount);
ide_add_setting(drive, "nowerr", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
&drive->nowerr, set_nowerr);
ide_add_setting(drive, "lun", SETTING_RW, TYPE_INT, 0, 7, 1, 1,
&drive->lun, NULL);
ide_add_setting(drive, "wcache", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
&drive->wcache, write_cache);
ide_add_setting(drive, "acoustic", SETTING_RW, TYPE_BYTE, 0, 254, 1, 1,
&drive->acoustic, set_acoustic);
ide_add_setting(drive, "failures", SETTING_RW, TYPE_INT, 0, 65535, 1, 1,
&drive->failures, NULL);
ide_add_setting(drive, "max_failures", SETTING_RW, TYPE_INT, 0, 65535,
1, 1, &drive->max_failures, NULL);
}
#else
static inline void idedisk_add_settings(ide_drive_t *drive) { ; }
ide_devset_rw_nolock(acoustic, 0, 254, acoustic);
ide_devset_rw_nolock(address, 0, 2, lba_addressing);
ide_devset_rw_nolock(multcount, 0, 16, multcount);
ide_devset_rw_nolock(nowerr, 0, 1, nowerr);
ide_devset_rw_nolock(wcache, 0, 1, wcache);
ide_devset_rw(bios_cyl, 0, 65535, bios_cyl);
ide_devset_rw(bios_head, 0, 255, bios_head);
ide_devset_rw(bios_sect, 0, 63, bios_sect);
ide_devset_rw(failures, 0, 65535, failures);
ide_devset_rw(lun, 0, 7, lun);
ide_devset_rw(max_failures, 0, 65535, max_failures);
static const struct ide_devset *idedisk_settings[] = {
&ide_devset_acoustic,
&ide_devset_address,
&ide_devset_bios_cyl,
&ide_devset_bios_head,
&ide_devset_bios_sect,
&ide_devset_failures,
&ide_devset_lun,
&ide_devset_max_failures,
&ide_devset_multcount,
&ide_devset_nowerr,
&ide_devset_wcache,
NULL
};
#endif
static void idedisk_setup(ide_drive_t *drive)
......@@ -788,7 +798,6 @@ static void idedisk_setup(ide_drive_t *drive)
unsigned long long capacity;
ide_proc_register_driver(drive, idkp->driver);
idedisk_add_settings(drive);
if (drive->id_read == 0)
return;
......@@ -880,7 +889,7 @@ static void idedisk_setup(ide_drive_t *drive)
if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
drive->wcache = 1;
write_cache(drive, 1);
set_wcache(drive, 1);
}
static void ide_cacheflush_p(ide_drive_t *drive)
......@@ -976,6 +985,7 @@ static ide_driver_t idedisk_driver = {
.error = __ide_error,
#ifdef CONFIG_IDE_PROC_FS
.proc = idedisk_proc,
.settings = idedisk_settings,
#endif
};
......@@ -1056,19 +1066,18 @@ static int idedisk_ioctl(struct inode *inode, struct file *file,
struct block_device *bdev = inode->i_bdev;
struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk);
ide_drive_t *drive = idkp->drive;
int err, (*setfunc)(ide_drive_t *, int);
u8 *val;
int err, (*getfunc)(ide_drive_t *), (*setfunc)(ide_drive_t *, int);
switch (cmd) {
case HDIO_GET_ADDRESS: val = &drive->addressing; goto read_val;
case HDIO_GET_MULTCOUNT: val = &drive->mult_count; goto read_val;
case HDIO_GET_NOWERR: val = &drive->nowerr; goto read_val;
case HDIO_GET_WCACHE: val = &drive->wcache; goto read_val;
case HDIO_GET_ACOUSTIC: val = &drive->acoustic; goto read_val;
case HDIO_GET_ADDRESS: getfunc = get_lba_addressing; goto read_val;
case HDIO_GET_MULTCOUNT: getfunc = get_multcount; goto read_val;
case HDIO_GET_NOWERR: getfunc = get_nowerr; goto read_val;
case HDIO_GET_WCACHE: getfunc = get_wcache; goto read_val;
case HDIO_GET_ACOUSTIC: getfunc = get_acoustic; goto read_val;
case HDIO_SET_ADDRESS: setfunc = set_lba_addressing; goto set_val;
case HDIO_SET_MULTCOUNT: setfunc = set_multcount; goto set_val;
case HDIO_SET_NOWERR: setfunc = set_nowerr; goto set_val;
case HDIO_SET_WCACHE: setfunc = write_cache; goto set_val;
case HDIO_SET_WCACHE: setfunc = set_wcache; goto set_val;
case HDIO_SET_ACOUSTIC: setfunc = set_acoustic; goto set_val;
}
......@@ -1077,7 +1086,7 @@ static int idedisk_ioctl(struct inode *inode, struct file *file,
read_val:
mutex_lock(&ide_setting_mtx);
spin_lock_irqsave(&ide_lock, flags);
err = *val;
err = getfunc(drive);
spin_unlock_irqrestore(&ide_lock, flags);
mutex_unlock(&ide_setting_mtx);
return err >= 0 ? put_user(err, (long __user *)arg) : err;
......
......@@ -1007,21 +1007,32 @@ static int idefloppy_identify_device(ide_drive_t *drive, u16 *id)
}
#ifdef CONFIG_IDE_PROC_FS
static void idefloppy_add_settings(ide_drive_t *drive)
ide_devset_rw(bios_cyl, 0, 1023, bios_cyl);
ide_devset_rw(bios_head, 0, 255, bios_head);
ide_devset_rw(bios_sect, 0, 63, bios_sect);
static int get_ticks(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
return floppy->ticks;
}
ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
&drive->bios_cyl, NULL);
ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
&drive->bios_head, NULL);
ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1,
&drive->bios_sect, NULL);
ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
&floppy->ticks, NULL);
static int set_ticks(ide_drive_t *drive, int arg)
{
idefloppy_floppy_t *floppy = drive->driver_data;
floppy->ticks = arg;
return 0;
}
#else
static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
IDE_DEVSET(ticks, S_RW, 0, 255, get_ticks, set_ticks);
static const struct ide_devset *idefloppy_settings[] = {
&ide_devset_bios_cyl,
&ide_devset_bios_head,
&ide_devset_bios_sect,
&ide_devset_ticks,
NULL
};
#endif
static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
......@@ -1063,7 +1074,6 @@ static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
(void) ide_floppy_get_capacity(drive);
ide_proc_register_driver(drive, floppy->driver);
idefloppy_add_settings(drive);
}
static void ide_floppy_remove(ide_drive_t *drive)
......@@ -1126,6 +1136,7 @@ static ide_driver_t idefloppy_driver = {
.error = __ide_error,
#ifdef CONFIG_IDE_PROC_FS
.proc = idefloppy_proc,
.settings = idefloppy_settings,
#endif
};
......
......@@ -1332,8 +1332,6 @@ static void hwif_register_devices(ide_hwif_t *hwif)
if (!drive->present)
continue;
ide_add_generic_settings(drive);
snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i);
dev->parent = &hwif->gendev;
dev->bus = &ide_bus_type;
......
......@@ -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;