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>

1 files changed, 48 insertions, 39 deletions

diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index 7a15907dce1d..2e43ae15fb1b 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -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;