mirror of https://gitee.com/openkylin/linux.git
193 lines
3.9 KiB
C
193 lines
3.9 KiB
C
|
|
#include <linux/kernel.h>
|
|
#include <linux/gfp.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)) {
|
|
drive->pio_mode = arg + XFER_PIO_0;
|
|
|
|
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(hwif, drive);
|
|
spin_unlock_irqrestore(&hwif->lock, flags);
|
|
} else
|
|
port_ops->set_pio_mode(hwif, drive);
|
|
} 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, REQ_OP_DRV_IN, __GFP_RECLAIM);
|
|
scsi_req_init(rq);
|
|
ide_req(rq)->type = ATA_PRIV_MISC;
|
|
scsi_req(rq)->cmd_len = 5;
|
|
scsi_req(rq)->cmd[0] = REQ_DEVSET_EXEC;
|
|
*(int *)&scsi_req(rq)->cmd[1] = arg;
|
|
rq->special = setting->set;
|
|
|
|
blk_execute_rq(q, NULL, rq, 0);
|
|
ret = scsi_req(rq)->result;
|
|
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 *)&scsi_req(rq)->cmd[1]);
|
|
if (err)
|
|
scsi_req(rq)->result = err;
|
|
ide_complete_rq(drive, 0, blk_rq_bytes(rq));
|
|
return ide_stopped;
|
|
}
|