ide: move device settings code to ide-devsets.c
Remove stale comment from ide.c while at it.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-devsets.c b/drivers/ide/ide-devsets.c
new file mode 100644
index 0000000..7c39534
--- /dev/null
+++ b/drivers/ide/ide-devsets.c
@@ -0,0 +1,190 @@
+
+#include <linux/kernel.h>
+#include <linux/ide.h>
+
+DEFINE_MUTEX(ide_setting_mtx);
+
+ide_devset_get(io_32bit, io_32bit);
+
+static int set_io_32bit(ide_drive_t *drive, int arg)
+{
+ if (drive->dev_flags & IDE_DFLAG_NO_IO_32BIT)
+ return -EPERM;
+
+ if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
+ return -EINVAL;
+
+ drive->io_32bit = arg;
+
+ return 0;
+}
+
+ide_devset_get_flag(ksettings, IDE_DFLAG_KEEP_SETTINGS);
+
+static int set_ksettings(ide_drive_t *drive, int arg)
+{
+ if (arg < 0 || arg > 1)
+ return -EINVAL;
+
+ if (arg)
+ drive->dev_flags |= IDE_DFLAG_KEEP_SETTINGS;
+ else
+ drive->dev_flags &= ~IDE_DFLAG_KEEP_SETTINGS;
+
+ return 0;
+}
+
+ide_devset_get_flag(using_dma, IDE_DFLAG_USING_DMA);
+
+static int set_using_dma(ide_drive_t *drive, int arg)
+{
+#ifdef CONFIG_BLK_DEV_IDEDMA
+ int err = -EPERM;
+
+ if (arg < 0 || arg > 1)
+ return -EINVAL;
+
+ if (ata_id_has_dma(drive->id) == 0)
+ goto out;
+
+ if (drive->hwif->dma_ops == NULL)
+ goto out;
+
+ err = 0;
+
+ if (arg) {
+ if (ide_set_dma(drive))
+ err = -EIO;
+ } else
+ ide_dma_off(drive);
+
+out:
+ return err;
+#else
+ if (arg < 0 || arg > 1)
+ return -EINVAL;
+
+ return -EPERM;
+#endif
+}
+
+/*
+ * handle HDIO_SET_PIO_MODE ioctl abusers here, eventually it will go away
+ */
+static int set_pio_mode_abuse(ide_hwif_t *hwif, u8 req_pio)
+{
+ switch (req_pio) {
+ case 202:
+ case 201:
+ case 200:
+ case 102:
+ case 101:
+ case 100:
+ return (hwif->host_flags & IDE_HFLAG_ABUSE_DMA_MODES) ? 1 : 0;
+ case 9:
+ case 8:
+ return (hwif->host_flags & IDE_HFLAG_ABUSE_PREFETCH) ? 1 : 0;
+ case 7:
+ case 6:
+ return (hwif->host_flags & IDE_HFLAG_ABUSE_FAST_DEVSEL) ? 1 : 0;
+ default:
+ return 0;
+ }
+}
+
+static int set_pio_mode(ide_drive_t *drive, int arg)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ const struct ide_port_ops *port_ops = hwif->port_ops;
+
+ if (arg < 0 || arg > 255)
+ return -EINVAL;
+
+ if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
+ (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
+ return -ENOSYS;
+
+ if (set_pio_mode_abuse(drive->hwif, arg)) {
+ if (arg == 8 || arg == 9) {
+ unsigned long flags;
+
+ /* take lock for IDE_DFLAG_[NO_]UNMASK/[NO_]IO_32BIT */
+ spin_lock_irqsave(&hwif->lock, flags);
+ port_ops->set_pio_mode(drive, arg);
+ spin_unlock_irqrestore(&hwif->lock, flags);
+ } else
+ port_ops->set_pio_mode(drive, arg);
+ } else {
+ int keep_dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
+
+ ide_set_pio(drive, arg);
+
+ if (hwif->host_flags & IDE_HFLAG_SET_PIO_MODE_KEEP_DMA) {
+ if (keep_dma)
+ ide_dma_on(drive);
+ }
+ }
+
+ return 0;
+}
+
+ide_devset_get_flag(unmaskirq, IDE_DFLAG_UNMASK);
+
+static int set_unmaskirq(ide_drive_t *drive, int arg)
+{
+ if (drive->dev_flags & IDE_DFLAG_NO_UNMASK)
+ return -EPERM;
+
+ if (arg < 0 || arg > 1)
+ return -EINVAL;
+
+ if (arg)
+ drive->dev_flags |= IDE_DFLAG_UNMASK;
+ else
+ drive->dev_flags &= ~IDE_DFLAG_UNMASK;
+
+ return 0;
+}
+
+ide_ext_devset_rw_sync(io_32bit, io_32bit);
+ide_ext_devset_rw_sync(keepsettings, ksettings);
+ide_ext_devset_rw_sync(unmaskirq, unmaskirq);
+ide_ext_devset_rw_sync(using_dma, using_dma);
+__IDE_DEVSET(pio_mode, DS_SYNC, NULL, set_pio_mode);
+
+int ide_devset_execute(ide_drive_t *drive, const struct ide_devset *setting,
+ int arg)
+{
+ struct request_queue *q = drive->queue;
+ struct request *rq;
+ int ret = 0;
+
+ if (!(setting->flags & DS_SYNC))
+ return setting->set(drive, arg);
+
+ rq = blk_get_request(q, READ, __GFP_WAIT);
+ rq->cmd_type = REQ_TYPE_SPECIAL;
+ rq->cmd_len = 5;
+ rq->cmd[0] = REQ_DEVSET_EXEC;
+ *(int *)&rq->cmd[1] = arg;
+ rq->special = setting->set;
+
+ if (blk_execute_rq(q, NULL, rq, 0))
+ ret = rq->errors;
+ blk_put_request(rq);
+
+ return ret;
+}
+
+ide_startstop_t ide_do_devset(ide_drive_t *drive, struct request *rq)
+{
+ int err, (*setfunc)(ide_drive_t *, int) = rq->special;
+
+ err = setfunc(drive, *(int *)&rq->cmd[1]);
+ if (err)
+ rq->errors = err;
+ else
+ err = 1;
+ ide_end_request(drive, err, 0);
+ return ide_stopped;
+}