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, 36 insertions, 16 deletions

diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index 02bd5c487d1f..65cf84b222c5 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -429,21 +429,41 @@ static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *r
 }
 
 #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
 
 /*
@@ -461,7 +481,6 @@ static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi)
         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)
@@ -509,6 +528,7 @@ static ide_driver_t idescsi_driver = {
         .error                  = idescsi_atapi_error,
 #ifdef CONFIG_IDE_PROC_FS
         .proc                   = idescsi_proc,
+        .settings               = idescsi_settings,
 #endif
 };