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