#include <linux/hdreg.h>
#include <linux/bitops.h>
#include <linux/mutex.h>
+#include <linux/scatterlist.h>
#include <scsi/scsi_ioctl.h>
*/
#define IDEFLOPPY_PC_BUFFER_SIZE 256
-/*
- * In various places in the driver, we need to allocate storage for packet
- * commands and requests, which will remain valid while we leave the driver to
- * wait for an interrupt or a timeout event.
- */
-#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES)
-
/* format capacities descriptor codes */
#define CAPACITY_INVALID 0x00
#define CAPACITY_UNFORMATTED 0x01
struct ide_atapi_pc *pc;
/* Last failed packet command */
struct ide_atapi_pc *failed_pc;
- /* Packet command stack */
- struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK];
- /* Next free packet command storage space */
- int pc_stack_index;
- struct request rq_stack[IDEFLOPPY_PC_STACK];
- /* We implement a circular array */
- int rq_stack_index;
+ /* used for blk_{fs,pc}_request() requests */
+ struct ide_atapi_pc queued_pc;
+
+ struct ide_atapi_pc request_sense_pc;
+ struct request request_sense_rq;
/* Last error information */
u8 sense_key, asc, ascq;
unsigned int bcount, int direction)
{
ide_hwif_t *hwif = drive->hwif;
- struct request *rq = pc->rq;
- struct req_iterator iter;
- struct bio_vec *bvec;
- unsigned long flags;
+ const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+ xfer_func_t *xf = direction ? tp_ops->output_data : tp_ops->input_data;
+ struct scatterlist *sg = pc->sg;
+ char *buf;
int count, done = 0;
- char *data;
-
- rq_for_each_segment(bvec, rq, iter) {
- if (!bcount)
- break;
-
- count = min(bvec->bv_len, bcount);
-
- data = bvec_kmap_irq(bvec, &flags);
- if (direction)
- hwif->tp_ops->output_data(drive, NULL, data, count);
- else
- hwif->tp_ops->input_data(drive, NULL, data, count);
- bvec_kunmap_irq(data, &flags);
+ while (bcount) {
+ count = min(sg->length - pc->b_count, bcount);
+ if (PageHighMem(sg_page(sg))) {
+ unsigned long flags;
+
+ local_irq_save(flags);
+ buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
+ xf(drive, NULL, buf + pc->b_count, count);
+ kunmap_atomic(buf - sg->offset, KM_IRQ0);
+ local_irq_restore(flags);
+ } else {
+ buf = sg_virt(sg);
+ xf(drive, NULL, buf + pc->b_count, count);
+ }
bcount -= count;
pc->b_count += count;
done += count;
+
+ if (pc->b_count == sg->length) {
+ if (!--pc->sg_cnt)
+ break;
+ pc->sg = sg = sg_next(sg);
+ pc->b_count = 0;
+ }
}
idefloppy_end_request(drive, 1, done >> 9);
ide_do_drive_cmd(drive, rq);
}
-static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
-
- if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
- floppy->pc_stack_index = 0;
- return (&floppy->pc_stack[floppy->pc_stack_index++]);
-}
-
-static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
-{
- idefloppy_floppy_t *floppy = drive->driver_data;
-
- if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
- floppy->rq_stack_index = 0;
- return (&floppy->rq_stack[floppy->rq_stack_index++]);
-}
-
static void ide_floppy_callback(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
*/
static void idefloppy_retry_pc(ide_drive_t *drive)
{
- struct ide_atapi_pc *pc;
- struct request *rq;
+ struct ide_floppy_obj *floppy = drive->driver_data;
+ struct request *rq = &floppy->request_sense_rq;
+ struct ide_atapi_pc *pc = &floppy->request_sense_pc;
(void)ide_read_error(drive);
- pc = idefloppy_next_pc_storage(drive);
- rq = idefloppy_next_rq_storage(drive);
idefloppy_create_request_sense_cmd(pc);
idefloppy_queue_pc_head(drive, pc, rq);
}
memcpy(rq->cmd, pc->c, 12);
pc->rq = rq;
- pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
+ pc->b_count = 0;
if (rq->cmd_flags & REQ_RW)
pc->flags |= PC_FLAG_WRITING;
pc->buf = NULL;
idefloppy_init_pc(pc);
memcpy(pc->c, rq->cmd, sizeof(pc->c));
pc->rq = rq;
- pc->b_count = rq->data_len;
+ pc->b_count = 0;
if (rq->data_len && rq_data_dir(rq) == WRITE)
pc->flags |= PC_FLAG_WRITING;
pc->buf = rq->data;
struct request *rq, sector_t block_s)
{
idefloppy_floppy_t *floppy = drive->driver_data;
+ ide_hwif_t *hwif = drive->hwif;
struct ide_atapi_pc *pc;
unsigned long block = (unsigned long)block_s;
- debug_log("dev: %s, cmd_type: %x, errors: %d\n",
- rq->rq_disk ? rq->rq_disk->disk_name : "?",
- rq->cmd_type, rq->errors);
- debug_log("sector: %ld, nr_sectors: %ld, "
- "current_nr_sectors: %d\n", (long)rq->sector,
- rq->nr_sectors, rq->current_nr_sectors);
+ debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
+ __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
+ rq->cmd[0], rq->cmd_type, rq->errors);
+
+ debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
+ __func__, (long)rq->sector, rq->nr_sectors,
+ rq->current_nr_sectors);
if (rq->errors >= ERROR_MAX) {
if (floppy->failed_pc)
idefloppy_end_request(drive, 0, 0);
return ide_stopped;
}
- pc = idefloppy_next_pc_storage(drive);
+ pc = &floppy->queued_pc;
idefloppy_create_rw_cmd(floppy, pc, rq, block);
} else if (blk_special_request(rq)) {
pc = (struct ide_atapi_pc *) rq->buffer;
} else if (blk_pc_request(rq)) {
- pc = idefloppy_next_pc_storage(drive);
+ pc = &floppy->queued_pc;
idefloppy_blockpc_cmd(floppy, pc, rq);
} else {
blk_dump_rq_flags(rq,
return ide_stopped;
}
+ ide_init_sg_cmd(drive, rq);
+ ide_map_sg(drive, rq);
+
+ pc->sg = hwif->sg_table;
+ pc->sg_cnt = hwif->sg_nents;
+
pc->rq = rq;
return idefloppy_issue_pc(drive, pc);
return 1;
floppy->srfp = pc.buf[8 + 2] & 0x40;
- return (0);
+ return 0;
}
/*
int __user *argp;
if (get_user(u_array_size, arg))
- return (-EFAULT);
+ return -EFAULT;
if (u_array_size <= 0)
- return (-EINVAL);
+ return -EINVAL;
idefloppy_create_read_capacity_cmd(&pc);
if (idefloppy_queue_pc_tail(drive, &pc)) {
printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
- return (-EIO);
+ return -EIO;
}
+
header_len = pc.buf[3];
desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
if (put_user(blocks, argp))
- return(-EFAULT);
+ return -EFAULT;
+
++argp;
if (put_user(length, argp))
- return (-EFAULT);
+ return -EFAULT;
+
++argp;
++u_index;
}
if (put_user(u_index, arg))
- return (-EFAULT);
- return (0);
+ return -EFAULT;
+
+ return 0;
}
/*
* the dsc bit, and return either 0 or 65536.
*/
-static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
+static int ide_floppy_get_format_progress(ide_drive_t *drive, int __user *arg)
{
idefloppy_floppy_t *floppy = drive->driver_data;
struct ide_atapi_pc pc;
if (floppy->srfp) {
idefloppy_create_request_sense_cmd(&pc);
if (idefloppy_queue_pc_tail(drive, &pc))
- return (-EIO);
+ return -EIO;
if (floppy->sense_key == 2 &&
floppy->asc == 4 &&
progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000;
}
+
if (put_user(progress_indication, arg))
- return (-EFAULT);
+ return -EFAULT;
- return (0);
+ return 0;
}
static sector_t idefloppy_capacity(ide_drive_t *drive)
u8 gcw[2];
*((u16 *)&gcw) = id[ATA_ID_CONFIG];
- floppy->pc = floppy->pc_stack;
+
drive->pc_callback = ide_floppy_callback;
if (((gcw[0] & 0x60) >> 5) == 1)
return 0;
}
-static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
- int __user *arg)
+static int ide_floppy_format_unit(ide_drive_t *drive, int __user *arg)
{
+ idefloppy_floppy_t *floppy = drive->driver_data;
struct ide_atapi_pc pc;
- ide_drive_t *drive = floppy->drive;
int blocks, length, flags, err = 0;
if (floppy->openers > 1) {
return err;
}
+static int ide_floppy_format_ioctl(ide_drive_t *drive, struct file *file,
+ unsigned int cmd, void __user *argp)
+{
+ switch (cmd) {
+ case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
+ return 0;
+ case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
+ return ide_floppy_get_format_capacities(drive, argp);
+ case IDEFLOPPY_IOCTL_FORMAT_START:
+ if (!(file->f_mode & 2))
+ return -EPERM;
+ return ide_floppy_format_unit(drive, (int __user *)argp);
+ case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
+ return ide_floppy_get_format_progress(drive, argp);
+ default:
+ return -ENOTTY;
+ }
+}
static int idefloppy_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
void __user *argp = (void __user *)arg;
int err;
- switch (cmd) {
- case CDROMEJECT:
- /* fall through */
- case CDROM_LOCKDOOR:
+ if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
return ide_floppy_lockdoor(drive, &pc, arg, cmd);
- case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
- return 0;
- case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
- return ide_floppy_get_format_capacities(drive, argp);
- case IDEFLOPPY_IOCTL_FORMAT_START:
- if (!(file->f_mode & 2))
- return -EPERM;
- return ide_floppy_format_unit(floppy, (int __user *)arg);
- case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
- return idefloppy_get_format_progress(drive, argp);
- }
+ err = ide_floppy_format_ioctl(drive, file, cmd, argp);
+ if (err != -ENOTTY)
+ return err;
/*
* skip SCSI_IOCTL_SEND_COMMAND (deprecated)
if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
bdev->bd_disk, cmd, argp);
- else
- err = -ENOTTY;
if (err == -ENOTTY)
err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
projects / linux-2.6-omap-h63xx.git / blobdiff