summaryrefslogtreecommitdiff
path: root/drivers/char/ftape/lowlevel/ftape-format.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/char/ftape/lowlevel/ftape-format.c')
-rw-r--r--drivers/char/ftape/lowlevel/ftape-format.c344
1 files changed, 0 insertions, 344 deletions
diff --git a/drivers/char/ftape/lowlevel/ftape-format.c b/drivers/char/ftape/lowlevel/ftape-format.c
deleted file mode 100644
index 5dd4c59a3f34..000000000000
--- a/drivers/char/ftape/lowlevel/ftape-format.c
+++ /dev/null
@@ -1,344 +0,0 @@
-/*
- * Copyright (C) 1997 Claus-Justus Heine.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- *
- * $Source: /homes/cvs/ftape-stacked/ftape/lowlevel/ftape-format.c,v $
- * $Revision: 1.2.4.1 $
- * $Date: 1997/11/14 16:05:39 $
- *
- * This file contains the code to support formatting of floppy
- * tape cartridges with the QIC-40/80/3010/3020 floppy-tape
- * driver "ftape" for Linux.
- */
-
-#include <linux/string.h>
-#include <linux/errno.h>
-
-#include <linux/ftape.h>
-#include <linux/qic117.h>
-#include "../lowlevel/ftape-tracing.h"
-#include "../lowlevel/ftape-io.h"
-#include "../lowlevel/ftape-ctl.h"
-#include "../lowlevel/ftape-rw.h"
-#include "../lowlevel/ftape-ecc.h"
-#include "../lowlevel/ftape-bsm.h"
-#include "../lowlevel/ftape-format.h"
-
-#if defined(TESTING)
-#define FT_FMT_SEGS_PER_BUF 50
-#else
-#define FT_FMT_SEGS_PER_BUF (FT_BUFF_SIZE/(4*FT_SECTORS_PER_SEGMENT))
-#endif
-
-static spinlock_t ftape_format_lock;
-
-/*
- * first segment of the new buffer
- */
-static int switch_segment;
-
-/*
- * at most 256 segments fit into one 32 kb buffer. Even TR-1 cartridges have
- * more than this many segments per track, so better be careful.
- *
- * buffer_struct *buff: buffer to store the formatting coordinates in
- * int start: starting segment for this buffer.
- * int spt: segments per track
- *
- * Note: segment ids are relative to the start of the track here.
- */
-static void setup_format_buffer(buffer_struct *buff, int start, int spt,
- __u8 gap3)
-{
- int to_do = spt - start;
- TRACE_FUN(ft_t_flow);
-
- if (to_do > FT_FMT_SEGS_PER_BUF) {
- to_do = FT_FMT_SEGS_PER_BUF;
- }
- buff->ptr = buff->address;
- buff->remaining = to_do * FT_SECTORS_PER_SEGMENT; /* # sectors */
- buff->bytes = buff->remaining * 4; /* need 4 bytes per sector */
- buff->gap3 = gap3;
- buff->segment_id = start;
- buff->next_segment = start + to_do;
- if (buff->next_segment >= spt) {
- buff->next_segment = 0; /* 0 means: stop runner */
- }
- buff->status = waiting; /* tells the isr that it can use
- * this buffer
- */
- TRACE_EXIT;
-}
-
-
-/*
- * start formatting a new track.
- */
-int ftape_format_track(const unsigned int track, const __u8 gap3)
-{
- unsigned long flags;
- buffer_struct *tail, *head;
- int status;
- TRACE_FUN(ft_t_flow);
-
- TRACE_CATCH(ftape_ready_wait(ftape_timeout.pause, &status),);
- if (track & 1) {
- if (!(status & QIC_STATUS_AT_EOT)) {
- TRACE_CATCH(ftape_seek_to_eot(),);
- }
- } else {
- if (!(status & QIC_STATUS_AT_BOT)) {
- TRACE_CATCH(ftape_seek_to_bot(),);
- }
- }
- ftape_abort_operation(); /* this sets ft_head = ft_tail = 0 */
- ftape_set_state(formatting);
-
- TRACE(ft_t_noise,
- "Formatting track %d, logical: from segment %d to %d",
- track, track * ft_segments_per_track,
- (track + 1) * ft_segments_per_track - 1);
-
- /*
- * initialize the buffer switching protocol for this track
- */
- head = ftape_get_buffer(ft_queue_head); /* tape isn't running yet */
- tail = ftape_get_buffer(ft_queue_tail); /* tape isn't running yet */
- switch_segment = 0;
- do {
- FT_SIGNAL_EXIT(_DONT_BLOCK);
- setup_format_buffer(tail, switch_segment,
- ft_segments_per_track, gap3);
- switch_segment = tail->next_segment;
- } while ((switch_segment != 0) &&
- ((tail = ftape_next_buffer(ft_queue_tail)) != head));
- /* go */
- head->status = formatting;
- TRACE_CATCH(ftape_seek_head_to_track(track),);
- TRACE_CATCH(ftape_command(QIC_LOGICAL_FORWARD),);
- spin_lock_irqsave(&ftape_format_lock, flags);
- TRACE_CATCH(fdc_setup_formatting(head), restore_flags(flags));
- spin_unlock_irqrestore(&ftape_format_lock, flags);
- TRACE_EXIT 0;
-}
-
-/* return segment id of segment currently being formatted and do the
- * buffer switching stuff.
- */
-int ftape_format_status(unsigned int *segment_id)
-{
- buffer_struct *tail = ftape_get_buffer(ft_queue_tail);
- int result;
- TRACE_FUN(ft_t_flow);
-
- while (switch_segment != 0 &&
- ftape_get_buffer(ft_queue_head) != tail) {
- FT_SIGNAL_EXIT(_DONT_BLOCK);
- /* need more buffers, first wait for empty buffer
- */
- TRACE_CATCH(ftape_wait_segment(formatting),);
- /* don't worry for gap3. If we ever hit this piece of code,
- * then all buffer already have the correct gap3 set!
- */
- setup_format_buffer(tail, switch_segment,
- ft_segments_per_track, tail->gap3);
- switch_segment = tail->next_segment;
- if (switch_segment != 0) {
- tail = ftape_next_buffer(ft_queue_tail);
- }
- }
- /* should runner stop ?
- */
- if (ft_runner_status == aborting || ft_runner_status == do_abort) {
- buffer_struct *head = ftape_get_buffer(ft_queue_head);
- TRACE(ft_t_warn, "Error formatting segment %d",
- ftape_get_buffer(ft_queue_head)->segment_id);
- (void)ftape_abort_operation();
- TRACE_EXIT (head->status != error) ? -EAGAIN : -EIO;
- }
- /*
- * don't care if the timer expires, this is just kind of a
- * "select" operation that lets the calling process sleep
- * until something has happened
- */
- if (fdc_interrupt_wait(5 * FT_SECOND) < 0) {
- TRACE(ft_t_noise, "End of track %d at segment %d",
- ft_location.track,
- ftape_get_buffer(ft_queue_head)->segment_id);
- result = 1; /* end of track, unlock module */
- } else {
- result = 0;
- }
- /*
- * the calling process should use the seg id to determine
- * which parts of the dma buffers can be safely overwritten
- * with new data.
- */
- *segment_id = ftape_get_buffer(ft_queue_head)->segment_id;
- /*
- * Internally we start counting segment ids from the start of
- * each track when formatting, but externally we keep them
- * relative to the start of the tape:
- */
- *segment_id += ft_location.track * ft_segments_per_track;
- TRACE_EXIT result;
-}
-
-/*
- * The segment id is relative to the start of the tape
- */
-int ftape_verify_segment(const unsigned int segment_id, SectorMap *bsm)
-{
- int result;
- int verify_done = 0;
- TRACE_FUN(ft_t_flow);
-
- TRACE(ft_t_noise, "Verifying segment %d", segment_id);
-
- if (ft_driver_state != verifying) {
- TRACE(ft_t_noise, "calling ftape_abort_operation");
- if (ftape_abort_operation() < 0) {
- TRACE(ft_t_err, "ftape_abort_operation failed");
- TRACE_EXIT -EIO;
- }
- }
- *bsm = 0x00000000;
- ftape_set_state(verifying);
- for (;;) {
- buffer_struct *tail;
- /*
- * Allow escape from this loop on signal
- */
- FT_SIGNAL_EXIT(_DONT_BLOCK);
- /*
- * Search all full buffers for the first matching the
- * wanted segment. Clear other buffers on the fly.
- */
- tail = ftape_get_buffer(ft_queue_tail);
- while (!verify_done && tail->status == done) {
- /*
- * Allow escape from this loop on signal !
- */
- FT_SIGNAL_EXIT(_DONT_BLOCK);
- if (tail->segment_id == segment_id) {
- /* If out buffer is already full,
- * return its contents.
- */
- TRACE(ft_t_flow, "found segment in cache: %d",
- segment_id);
- if ((tail->soft_error_map |
- tail->hard_error_map) != 0) {
- TRACE(ft_t_info,"bsm[%d] = 0x%08lx",
- segment_id,
- (unsigned long)
- (tail->soft_error_map |
- tail->hard_error_map));
- *bsm = (tail->soft_error_map |
- tail->hard_error_map);
- }
- verify_done = 1;
- } else {
- TRACE(ft_t_flow,"zapping segment in cache: %d",
- tail->segment_id);
- }
- tail->status = waiting;
- tail = ftape_next_buffer(ft_queue_tail);
- }
- if (!verify_done && tail->status == verifying) {
- if (tail->segment_id == segment_id) {
- switch(ftape_wait_segment(verifying)) {
- case 0:
- break;
- case -EINTR:
- TRACE_ABORT(-EINTR, ft_t_warn,
- "interrupted by "
- "non-blockable signal");
- break;
- default:
- ftape_abort_operation();
- ftape_set_state(verifying);
- /* be picky */
- TRACE_ABORT(-EIO, ft_t_warn,
- "wait_segment failed");
- }
- } else {
- /* We're reading the wrong segment,
- * stop runner.
- */
- TRACE(ft_t_noise, "verifying wrong segment");
- ftape_abort_operation();
- ftape_set_state(verifying);
- }
- }
- /* should runner stop ?
- */
- if (ft_runner_status == aborting) {
- buffer_struct *head = ftape_get_buffer(ft_queue_head);
- if (head->status == error ||
- head->status == verifying) {
- /* no data or overrun error */
- head->status = waiting;
- }
- TRACE_CATCH(ftape_dumb_stop(),);
- } else {
- /* If just passed last segment on tape: wait
- * for BOT or EOT mark. Sets ft_runner_status to
- * idle if at lEOT and successful
- */
- TRACE_CATCH(ftape_handle_logical_eot(),);
- }
- if (verify_done) {
- TRACE_EXIT 0;
- }
- /* Now at least one buffer is idle!
- * Restart runner & tape if needed.
- */
- /* We could optimize the following a little bit. We know that
- * the bad sector map is empty.
- */
- tail = ftape_get_buffer(ft_queue_tail);
- if (tail->status == waiting) {
- buffer_struct *head = ftape_get_buffer(ft_queue_head);
-
- ftape_setup_new_segment(head, segment_id, -1);
- ftape_calc_next_cluster(head);
- if (ft_runner_status == idle) {
- result = ftape_start_tape(segment_id,
- head->sector_offset);
- switch(result) {
- case 0:
- break;
- case -ETIME:
- case -EINTR:
- TRACE_ABORT(result, ft_t_err, "Error: "
- "segment %d unreachable",
- segment_id);
- break;
- default:
- *bsm = EMPTY_SEGMENT;
- TRACE_EXIT 0;
- break;
- }
- }
- head->status = verifying;
- fdc_setup_read_write(head, FDC_VERIFY);
- }
- }
- /* not reached */
- TRACE_EXIT -EIO;
-}
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-06 15:36:59 +0000