[PATCH 3/3] ide: /proc/ide/hd*/settings rework

From: Bartlomiej Zolnierkiewicz
Date: Sun Jul 27 2008 - 14:59:23 EST

* 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@xxxxxxxxx>
---
drivers/ide/ide-cd.c | 15 +-
drivers/ide/ide-disk.c | 87 ++++++++------
drivers/ide/ide-floppy.c | 35 +++--
drivers/ide/ide-probe.c | 2
drivers/ide/ide-proc.c | 279 ++++++++++++++---------------------------------
drivers/ide/ide-tape.c | 74 ++++++++----
drivers/ide/ide.c | 21 ++-
drivers/scsi/ide-scsi.c | 52 ++++++--
include/linux/ide.h | 110 ++++++++++++------
9 files changed, 340 insertions(+), 335 deletions(-)

Index: b/drivers/ide/ide-cd.c
===================================================================
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1803,13 +1803,12 @@ 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[] = {
@@ -1918,7 +1917,6 @@ static int ide_cdrom_setup(ide_drive_t *
}

ide_proc_register_driver(drive, cd->driver);
- ide_cdrom_add_settings(drive);
return 0;
}

@@ -1969,6 +1967,7 @@ static ide_driver_t ide_cdrom_driver = {
.error = __ide_error,
#ifdef CONFIG_IDE_PROC_FS
.proc = idecd_proc,
+ .settings = idecd_settings,
#endif
};

Index: b/drivers/ide/ide-disk.c
===================================================================
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -606,6 +606,8 @@ static void idedisk_prepare_flush(struct
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.
@@ -632,6 +634,8 @@ static int set_multcount(ide_drive_t *dr
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)
@@ -680,7 +684,9 @@ static void update_ordered(ide_drive_t *
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;
@@ -717,6 +723,8 @@ static int do_idedisk_flushcache(ide_dri
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;
@@ -734,6 +742,8 @@ static int set_acoustic(ide_drive_t *dri
return 0;
}

+ide_devset_get(lba_addressing, addressing);
+
/*
* drive->addressing:
* 0: 28-bit
@@ -757,33 +767,33 @@ static int set_lba_addressing(ide_drive_
}

#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)
@@ -795,7 +805,6 @@ static void idedisk_setup(ide_drive_t *d
unsigned long long capacity;

ide_proc_register_driver(drive, idkp->driver);
- idedisk_add_settings(drive);

if (drive->id_read == 0)
return;
@@ -887,7 +896,7 @@ static void idedisk_setup(ide_drive_t *d
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)
@@ -983,6 +992,7 @@ static ide_driver_t idedisk_driver = {
.error = __ide_error,
#ifdef CONFIG_IDE_PROC_FS
.proc = idedisk_proc,
+ .settings = idedisk_settings,
#endif
};

@@ -1063,19 +1073,18 @@ static int idedisk_ioctl(struct inode *i
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;
}

@@ -1084,7 +1093,7 @@ static int idedisk_ioctl(struct inode *i
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;
Index: b/drivers/ide/ide-floppy.c
===================================================================
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -1006,21 +1006,32 @@ static int idefloppy_identify_device(ide
}

#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)
@@ -1062,7 +1073,6 @@ static void idefloppy_setup(ide_drive_t
(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)
@@ -1125,6 +1135,7 @@ static ide_driver_t idefloppy_driver = {
.error = __ide_error,
#ifdef CONFIG_IDE_PROC_FS
.proc = idefloppy_proc,
+ .settings = idefloppy_settings,
#endif
};

Index: b/drivers/ide/ide-probe.c
===================================================================
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1332,8 +1332,6 @@ static void hwif_register_devices(ide_hw
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;
Index: b/drivers/ide/ide-proc.c
===================================================================
--- 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_
* 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
* 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 *d
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(struc
{
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(struc
}

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(stru

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_driv
* 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);
}
Index: b/drivers/ide/ide-tape.c
===================================================================
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -2408,28 +2408,56 @@ static void idetape_get_mode_sense_resul
}

#ifdef CONFIG_IDE_PROC_FS
-static void idetape_add_settings(ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
-
- ide_add_setting(drive, "buffer", SETTING_READ, TYPE_SHORT, 0, 0xffff,
- 1, 2, (u16 *)&tape->caps[16], NULL);
- ide_add_setting(drive, "speed", SETTING_READ, TYPE_SHORT, 0, 0xffff,
- 1, 1, (u16 *)&tape->caps[14], NULL);
- ide_add_setting(drive, "buffer_size", SETTING_READ, TYPE_INT, 0, 0xffff,
- 1, 1024, &tape->buffer_size, NULL);
- ide_add_setting(drive, "tdsc", SETTING_RW, TYPE_INT, IDETAPE_DSC_RW_MIN,
- IDETAPE_DSC_RW_MAX, 1000, HZ, &tape->best_dsc_rw_freq,
- NULL);
- ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1,
- 1, &drive->dsc_overlap, NULL);
- ide_add_setting(drive, "avg_speed", SETTING_READ, TYPE_INT, 0, 0xffff,
- 1, 1, &tape->avg_speed, NULL);
- ide_add_setting(drive, "debug_mask", SETTING_RW, TYPE_INT, 0, 0xffff, 1,
- 1, &tape->debug_mask, NULL);
-}
-#else
-static inline void idetape_add_settings(ide_drive_t *drive) { ; }
+#define ide_tape_devset_get(name, field) \
+static int get_##name(ide_drive_t *drive) \
+{ \
+ idetape_tape_t *tape = drive->driver_data; \
+ return tape->field; \
+}
+
+#define ide_tape_devset_set(name, field) \
+static int set_##name(ide_drive_t *drive, int arg) \
+{ \
+ idetape_tape_t *tape = drive->driver_data; \
+ tape->field = arg; \
+ return 0; \
+}
+
+#define ide_tape_devset_rw(_name, _min, _max, _field, _mulf, _divf) \
+ide_tape_devset_get(_name, _field) \
+ide_tape_devset_set(_name, _field) \
+__IDE_DEVSET(_name, S_RW, _min, _max, get_##_name, set_##_name, _mulf, _divf)
+
+#define ide_tape_devset_r(_name, _min, _max, _field, _mulf, _divf) \
+ide_tape_devset_get(_name, _field) \
+__IDE_DEVSET(_name, S_READ, _min, _max, get_##_name, NULL, _mulf, _divf)
+
+static int mulf_tdsc(ide_drive_t *drive) { return 1000; }
+static int divf_tdsc(ide_drive_t *drive) { return HZ; }
+static int divf_buffer(ide_drive_t *drive) { return 2; }
+static int divf_buffer_size(ide_drive_t *drive) { return 1024; }
+
+ide_devset_rw(dsc_overlap, 0, 1, dsc_overlap);
+
+ide_tape_devset_rw(debug_mask, 0, 0xffff, debug_mask, NULL, NULL);
+ide_tape_devset_rw(tdsc, IDETAPE_DSC_RW_MIN, IDETAPE_DSC_RW_MAX,
+ best_dsc_rw_freq, mulf_tdsc, divf_tdsc);
+
+ide_tape_devset_r(avg_speed, 0, 0xffff, avg_speed, NULL, NULL);
+ide_tape_devset_r(speed, 0, 0xffff, caps[14], NULL, NULL);
+ide_tape_devset_r(buffer, 0, 0xffff, caps[16], NULL, divf_buffer);
+ide_tape_devset_r(buffer_size, 0, 0xffff, buffer_size, NULL, divf_buffer_size);
+
+static const struct ide_devset *idetape_settings[] = {
+ &ide_devset_avg_speed,
+ &ide_devset_buffer,
+ &ide_devset_buffer_size,
+ &ide_devset_debug_mask,
+ &ide_devset_dsc_overlap,
+ &ide_devset_speed,
+ &ide_devset_tdsc,
+ NULL
+};
#endif

/*
@@ -2513,7 +2541,6 @@ static void idetape_setup(ide_drive_t *d
drive->using_dma ? ", DMA":"");

ide_proc_register_driver(drive, tape->driver);
- idetape_add_settings(drive);
}

static void ide_tape_remove(ide_drive_t *drive)
@@ -2584,6 +2611,7 @@ static ide_driver_t idetape_driver = {
.error = __ide_error,
#ifdef CONFIG_IDE_PROC_FS
.proc = idetape_proc,
+ .settings = idetape_settings,
#endif
};

Index: b/drivers/ide/ide.c
===================================================================
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -287,6 +287,8 @@ int ide_spin_wait_hwgroup (ide_drive_t *

EXPORT_SYMBOL(ide_spin_wait_hwgroup);

+ide_devset_get(io_32bit, io_32bit);
+
int set_io_32bit(ide_drive_t *drive, int arg)
{
if (drive->no_io_32bit)
@@ -305,6 +307,8 @@ int set_io_32bit(ide_drive_t *drive, int
return 0;
}

+ide_devset_get(ksettings, keep_settings);
+
int set_ksettings(ide_drive_t *drive, int arg)
{
if (arg < 0 || arg > 1)
@@ -318,6 +322,8 @@ int set_ksettings(ide_drive_t *drive, in
return 0;
}

+ide_devset_get(using_dma, using_dma);
+
int set_using_dma(ide_drive_t *drive, int arg)
{
#ifdef CONFIG_BLK_DEV_IDEDMA
@@ -394,6 +400,8 @@ int set_pio_mode(ide_drive_t *drive, int
return 0;
}

+ide_devset_get(unmaskirq, unmask);
+
int set_unmaskirq(ide_drive_t *drive, int arg)
{
if (drive->no_unmask)
@@ -555,14 +563,13 @@ int generic_ide_ioctl(ide_drive_t *drive
{
unsigned long flags;
ide_driver_t *drv;
- int err = 0, (*setfunc)(ide_drive_t *, int);
- u8 *val;
+ int err = 0, (*getfunc)(ide_drive_t *), (*setfunc)(ide_drive_t *, int);

switch (cmd) {
- case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
- case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
- case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
- case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
+ case HDIO_GET_32BIT: getfunc = get_io_32bit; goto read_val;
+ case HDIO_GET_KEEPSETTINGS: getfunc = get_ksettings; goto read_val;
+ case HDIO_GET_UNMASKINTR: getfunc = get_unmaskirq; goto read_val;
+ case HDIO_GET_DMA: getfunc = get_using_dma; goto read_val;
case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
@@ -638,7 +645,7 @@ int generic_ide_ioctl(ide_drive_t *drive
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;
Index: b/drivers/scsi/ide-scsi.c
===================================================================
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -428,21 +428,41 @@ static ide_startstop_t idescsi_do_reques
}

#ifdef CONFIG_IDE_PROC_FS
-static void idescsi_add_settings(ide_drive_t *drive)
-{
- idescsi_scsi_t *scsi = drive_to_idescsi(drive);
-
-/*
- * drive setting name read/write data type min max mul_factor div_factor data pointer set function
- */
- 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, "transform", SETTING_RW, TYPE_INT, 0, 3, 1, 1, &scsi->transform, NULL);
- ide_add_setting(drive, "log", SETTING_RW, TYPE_INT, 0, 1, 1, 1, &scsi->log, NULL);
-}
-#else
-static inline void idescsi_add_settings(ide_drive_t *drive) { ; }
+#define ide_scsi_devset_get(name, field) \
+static int get_##name(ide_drive_t *drive) \
+{ \
+ idescsi_scsi_t *scsi = drive_to_idescsi(drive); \
+ return scsi->field; \
+}
+
+#define ide_scsi_devset_set(name, field) \
+static int set_##name(ide_drive_t *drive, int arg) \
+{ \
+ idescsi_scsi_t *scsi = drive_to_idescsi(drive); \
+ scsi->field = arg; \
+ return 0; \
+}
+
+#define ide_scsi_devset_rw(_name, _min, _max, _field) \
+ide_scsi_devset_get(_name, _field); \
+ide_scsi_devset_set(_name, _field); \
+IDE_DEVSET(_name, S_RW, _min, _max, get_##_name, set_##_name)
+
+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);
+
+ide_scsi_devset_rw(transform, 0, 3, transform);
+ide_scsi_devset_rw(log, 0, 1, log);
+
+static const struct ide_devset *idescsi_settings[] = {
+ &ide_devset_bios_cyl,
+ &ide_devset_bios_head,
+ &ide_devset_bios_sect,
+ &ide_devset_log,
+ &ide_devset_transform,
+ NULL
+};
#endif

/*
@@ -460,7 +480,6 @@ static void idescsi_setup (ide_drive_t *
drive->pc_callback = ide_scsi_callback;

ide_proc_register_driver(drive, scsi->driver);
- idescsi_add_settings(drive);
}

static void ide_scsi_remove(ide_drive_t *drive)
@@ -508,6 +527,7 @@ static ide_driver_t idescsi_driver = {
.error = idescsi_atapi_error,
#ifdef CONFIG_IDE_PROC_FS
.proc = idescsi_proc,
+ .settings = idescsi_settings,
#endif
};

Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -315,8 +315,8 @@ typedef enum {
ide_started, /* a drive operation was started, handler was set */
} ide_startstop_t;

+struct ide_devset;
struct ide_driver_s;
-struct ide_settings_s;

#ifdef CONFIG_BLK_DEV_IDEACPI
struct ide_acpi_drive_link;
@@ -393,7 +393,7 @@ struct ide_drive_s {
u16 *id; /* identification info */
#ifdef CONFIG_IDE_PROC_FS
struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
- struct ide_settings_s *settings;/* /proc/ide/ drive settings */
+ const struct ide_devset **settings; /* /proc/ide/ drive settings */
#endif
struct hwif_s *hwif; /* actually (ide_hwif_t *) */

@@ -405,16 +405,16 @@ struct ide_drive_s {
special_t special; /* special action flags */
select_t select; /* basic drive/head select reg value */

- u8 keep_settings; /* restore settings after drive reset */
- u8 using_dma; /* disk is using dma for read/write */
u8 retry_pio; /* retrying dma capable host in pio */
u8 state; /* retry state */
u8 waiting_for_dma; /* dma currently in progress */
- u8 unmask; /* okay to unmask other irqs */
- u8 noflush; /* don't attempt flushes */
- u8 dsc_overlap; /* DSC overlap */
- u8 nice1; /* give potential excess bandwidth */

+ unsigned keep_settings : 1; /* restore settings after drive reset */
+ unsigned using_dma : 1; /* disk is using dma for read/write */
+ unsigned unmask : 1; /* okay to unmask other irqs */
+ unsigned noflush : 1; /* don't attempt flushes */
+ unsigned dsc_overlap : 1; /* DSC overlap */
+ unsigned nice1 : 1; /* give potential excess bandwidth */
unsigned present : 1; /* drive is physically present */
unsigned dead : 1; /* device ejected hint */
unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
@@ -432,14 +432,15 @@ struct ide_drive_s {
unsigned sleeping : 1; /* 1=sleeping & sleep field valid */
unsigned post_reset : 1;
unsigned udma33_warned : 1;
+ unsigned addressing : 2; /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
+ unsigned wcache : 1; /* status of write cache */
+ unsigned nowerr : 1; /* used for ignoring ATA_DF */

- u8 addressing; /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
u8 quirk_list; /* considered quirky, set for a specific host */
u8 init_speed; /* transfer rate set at boot */
u8 current_speed; /* current transfer rate set */
u8 desired_speed; /* desired transfer rate set */
u8 dn; /* now wide spread use */
- u8 wcache; /* status of write cache */
u8 acoustic; /* acoustic management */
u8 media; /* disk, cdrom, tape, floppy, ... */
u8 ready_stat; /* min status value for drive ready */
@@ -448,7 +449,6 @@ struct ide_drive_s {
u8 tune_req; /* requested drive tuning setting */
u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
u8 bad_wstat; /* used for ignoring ATA_DF */
- u8 nowerr; /* used for ignoring ATA_DF */
u8 head; /* "real" number of heads */
u8 sect; /* "real" sectors per track */
u8 bios_head; /* BIOS/fdisk/LILO number of heads */
@@ -696,12 +696,29 @@ typedef struct ide_driver_s ide_driver_t

extern struct mutex ide_setting_mtx;

+int get_io_32bit(ide_drive_t *);
int set_io_32bit(ide_drive_t *, int);
+int get_ksettings(ide_drive_t *);
int set_ksettings(ide_drive_t *, int);
int set_pio_mode(ide_drive_t *, int);
+int get_unmaskirq(ide_drive_t *);
int set_unmaskirq(ide_drive_t *, int);
+int get_using_dma(ide_drive_t *);
int set_using_dma(ide_drive_t *, int);

+#define ide_devset_get(name, field) \
+int get_##name(ide_drive_t *drive) \
+{ \
+ return drive->field; \
+}
+
+#define ide_devset_set(name, field) \
+int set_##name(ide_drive_t *drive, int arg) \
+{ \
+ drive->field = arg; \
+ return 0; \
+}
+
/* ATAPI packet command flags */
enum {
/* set when an error is considered normal - no retry (ide-tape) */
@@ -766,30 +783,53 @@ struct ide_atapi_pc {
* configurable drive settings
*/

-#define TYPE_INT 0
-#define TYPE_BYTE 1
-#define TYPE_SHORT 2
-
-#define SETTING_READ (1 << 0)
-#define SETTING_WRITE (1 << 1)
-#define SETTING_RW (SETTING_READ | SETTING_WRITE)
+#define S_READ (1 << 0)
+#define S_WRITE (1 << 1)
+#define S_RW (S_READ | S_WRITE)
+#define S_NOLOCK (1 << 2)

-typedef int (ide_procset_t)(ide_drive_t *, int);
-typedef struct ide_settings_s {
- 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;
- struct ide_settings_s *next;
-} ide_settings_t;
+struct ide_devset {
+ const char *name;
+ unsigned int flags;
+ int min, max;
+ int (*get)(ide_drive_t *);
+ int (*set)(ide_drive_t *, int);
+ int (*mulf)(ide_drive_t *);
+ int (*divf)(ide_drive_t *);
+};

-int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
+#define __DEVSET(_name, _flags, _min, _max, _get, _set, _mulf, _divf) { \
+ .name = __stringify(_name), \
+ .flags = _flags, \
+ .min = _min, \
+ .max = _max, \
+ .get = _get, \
+ .set = _set, \
+ .mulf = _mulf, \
+ .divf = _divf, \
+}
+
+#define __IDE_DEVSET(_name, _flags, _min, _max, _get, _set, _mulf, _divf) \
+static const struct ide_devset ide_devset_##_name = \
+ __DEVSET(_name, _flags, _min, _max, _get, _set, _mulf, _divf)
+
+#define IDE_DEVSET(_name, _flags, _min, _max, _get, _set) \
+__IDE_DEVSET(_name, _flags, _min, _max, _get, _set, NULL, NULL)
+
+#define ide_devset_rw_nolock(_name, _min, _max, _func) \
+IDE_DEVSET(_name, S_RW | S_NOLOCK, _min, _max, get_##_func, set_##_func)
+
+#define ide_devset_w_nolock(_name, _min, _max, _func) \
+IDE_DEVSET(_name, S_WRITE | S_NOLOCK, _min, _max, NULL, set_##_func)
+
+#define ide_devset_rw(_name, _min, _max, _field) \
+static ide_devset_get(_name, _field); \
+static ide_devset_set(_name, _field); \
+IDE_DEVSET(_name, S_RW, _min, _max, get_##_name, set_##_name)
+
+#define ide_devset_r(_name, _min, _max, _field) \
+ide_devset_get(_name, _field) \
+IDE_DEVSET(_name, S_READ, _min, _max, get_##_name, NULL)

/*
* /proc/ide interface
@@ -810,8 +850,6 @@ void ide_proc_unregister_port(ide_hwif_t
void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);

-void ide_add_generic_settings(ide_drive_t *);
-
read_proc_t proc_ide_read_capacity;
read_proc_t proc_ide_read_geometry;

@@ -839,7 +877,6 @@ static inline void ide_proc_unregister_d
static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
-static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
#endif

@@ -896,6 +933,7 @@ struct ide_driver_s {
void (*shutdown)(ide_drive_t *);
#ifdef CONFIG_IDE_PROC_FS
ide_proc_entry_t *proc;
+ const struct ide_devset **settings;
#endif
};

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