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>
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 @@
}
/**
- * __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
+ * ide_find_setting - find a specific setting
+ * @st: setting table pointer
* @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 @@
* 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->rw & SETTING_READ)) {
+ if ((setting->flags & S_READ)) {
+ unsigned long flags;
+
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 @@
* 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 @@
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.
- */
+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);
-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_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 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 @@
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 @@
{
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 @@
}
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)
- ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
+ 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);
+ }
mutex_unlock(&ide_setting_mtx);
}
} while (!for_real++);
@@ -680,6 +571,10 @@
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 @@
* 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);
}