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Diffstat (limited to 'drivers/char/ftape/lowlevel/ftape-ctl.c')
-rw-r--r--drivers/char/ftape/lowlevel/ftape-ctl.c896
1 files changed, 0 insertions, 896 deletions
diff --git a/drivers/char/ftape/lowlevel/ftape-ctl.c b/drivers/char/ftape/lowlevel/ftape-ctl.c
deleted file mode 100644
index 5d7c1ce92d5..00000000000
--- a/drivers/char/ftape/lowlevel/ftape-ctl.c
+++ /dev/null
@@ -1,896 +0,0 @@
-/*
- * Copyright (C) 1993-1996 Bas Laarhoven,
- * 1996-1997 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-ctl.c,v $
- * $Revision: 1.4 $
- * $Date: 1997/11/11 14:37:44 $
- *
- * This file contains the non-read/write ftape functions for the
- * QIC-40/80/3010/3020 floppy-tape driver "ftape" for Linux.
- */
-
-#include <linux/errno.h>
-#include <linux/mm.h>
-#include <linux/mman.h>
-
-#include <linux/ftape.h>
-#include <linux/qic117.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
-/* ease porting between pre-2.4.x and later kernels */
-#define vma_get_pgoff(v) ((v)->vm_pgoff)
-
-#include "../lowlevel/ftape-tracing.h"
-#include "../lowlevel/ftape-io.h"
-#include "../lowlevel/ftape-ctl.h"
-#include "../lowlevel/ftape-write.h"
-#include "../lowlevel/ftape-read.h"
-#include "../lowlevel/ftape-rw.h"
-#include "../lowlevel/ftape-bsm.h"
-
-/* Global vars.
- */
-ftape_info ftape_status = {
-/* vendor information */
- { 0, }, /* drive type */
-/* data rates */
- 500, /* used data rate */
- 500, /* drive max rate */
- 500, /* fdc max rate */
-/* drive selection, either FTAPE_SEL_A/B/C/D */
- -1, /* drive selection */
-/* flags set after decode the drive and tape status */
- 0, /* formatted */
- 1, /* no tape */
- 1, /* write protected */
- 1, /* new tape */
-/* values of last queried drive/tape status and error */
- {{0,}}, /* last error code */
- {{0,}}, /* drive status, configuration, tape status */
-/* cartridge geometry */
- 20, /* tracks_per_tape */
- 102, /* segments_per_track */
-/* location of header segments, etc. */
- -1, /* used_header_segment */
- -1, /* header_segment_1 */
- -1, /* header_segment_2 */
- -1, /* first_data_segment */
- -1, /* last_data_segment */
-/* the format code as stored in the header segment */
- fmt_normal, /* format code */
-/* the default for the qic std: unknown */
- -1,
-/* is tape running? */
- idle, /* runner_state */
-/* is tape reading/writing/verifying/formatting/deleting */
- idle, /* driver state */
-/* flags fatal hardware error */
- 1, /* failure */
-/* history record */
- { 0, } /* history record */
-};
-
-int ftape_segments_per_head = 1020;
-int ftape_segments_per_cylinder = 4;
-int ftape_init_drive_needed = 1; /* need to be global for ftape_reset_drive()
- * in ftape-io.c
- */
-
-/* Local vars.
- */
-static const vendor_struct vendors[] = QIC117_VENDORS;
-static const wakeup_method methods[] = WAKEUP_METHODS;
-
-const ftape_info *ftape_get_status(void)
-{
-#if defined(STATUS_PARANOYA)
- static ftape_info get_status;
-
- get_status = ftape_status;
- return &get_status;
-#else
- return &ftape_status; /* maybe return only a copy of it to assure
- * read only access
- */
-#endif
-}
-
-static int ftape_not_operational(int status)
-{
- /* return true if status indicates tape can not be used.
- */
- return ((status ^ QIC_STATUS_CARTRIDGE_PRESENT) &
- (QIC_STATUS_ERROR |
- QIC_STATUS_CARTRIDGE_PRESENT |
- QIC_STATUS_NEW_CARTRIDGE));
-}
-
-int ftape_seek_to_eot(void)
-{
- int status;
- TRACE_FUN(ft_t_any);
-
- TRACE_CATCH(ftape_ready_wait(ftape_timeout.pause, &status),);
- while ((status & QIC_STATUS_AT_EOT) == 0) {
- if (ftape_not_operational(status)) {
- TRACE_EXIT -EIO;
- }
- TRACE_CATCH(ftape_command_wait(QIC_PHYSICAL_FORWARD,
- ftape_timeout.rewind,&status),);
- }
- TRACE_EXIT 0;
-}
-
-int ftape_seek_to_bot(void)
-{
- int status;
- TRACE_FUN(ft_t_any);
-
- TRACE_CATCH(ftape_ready_wait(ftape_timeout.pause, &status),);
- while ((status & QIC_STATUS_AT_BOT) == 0) {
- if (ftape_not_operational(status)) {
- TRACE_EXIT -EIO;
- }
- TRACE_CATCH(ftape_command_wait(QIC_PHYSICAL_REVERSE,
- ftape_timeout.rewind,&status),);
- }
- TRACE_EXIT 0;
-}
-
-static int ftape_new_cartridge(void)
-{
- ft_location.track = -1; /* force seek on first access */
- ftape_zap_read_buffers();
- ftape_zap_write_buffers();
- return 0;
-}
-
-int ftape_abort_operation(void)
-{
- int result = 0;
- int status;
- TRACE_FUN(ft_t_flow);
-
- if (ft_runner_status == running) {
- TRACE(ft_t_noise, "aborting runner, waiting");
-
- ft_runner_status = do_abort;
- /* set timeout so that the tape will run to logical EOT
- * if we missed the last sector and there are no queue pulses.
- */
- result = ftape_dumb_stop();
- }
- if (ft_runner_status != idle) {
- if (ft_runner_status == do_abort) {
- TRACE(ft_t_noise, "forcing runner abort");
- }
- TRACE(ft_t_noise, "stopping tape");
- result = ftape_stop_tape(&status);
- ft_location.known = 0;
- ft_runner_status = idle;
- }
- ftape_reset_buffer();
- ftape_zap_read_buffers();
- ftape_set_state(idle);
- TRACE_EXIT result;
-}
-
-static int lookup_vendor_id(unsigned int vendor_id)
-{
- int i = 0;
-
- while (vendors[i].vendor_id != vendor_id) {
- if (++i >= NR_ITEMS(vendors)) {
- return -1;
- }
- }
- return i;
-}
-
-static void ftape_detach_drive(void)
-{
- TRACE_FUN(ft_t_any);
-
- TRACE(ft_t_flow, "disabling tape drive and fdc");
- ftape_put_drive_to_sleep(ft_drive_type.wake_up);
- fdc_catch_stray_interrupts(1); /* one always comes */
- fdc_disable();
- fdc_release_irq_and_dma();
- fdc_release_regions();
- TRACE_EXIT;
-}
-
-static void clear_history(void)
-{
- ft_history.used = 0;
- ft_history.id_am_errors =
- ft_history.id_crc_errors =
- ft_history.data_am_errors =
- ft_history.data_crc_errors =
- ft_history.overrun_errors =
- ft_history.no_data_errors =
- ft_history.retries =
- ft_history.crc_errors =
- ft_history.crc_failures =
- ft_history.ecc_failures =
- ft_history.corrected =
- ft_history.defects =
- ft_history.rewinds = 0;
-}
-
-static int ftape_activate_drive(vendor_struct * drive_type)
-{
- int result = 0;
- TRACE_FUN(ft_t_flow);
-
- /* If we already know the drive type, wake it up.
- * Else try to find out what kind of drive is attached.
- */
- if (drive_type->wake_up != unknown_wake_up) {
- TRACE(ft_t_flow, "enabling tape drive and fdc");
- result = ftape_wakeup_drive(drive_type->wake_up);
- if (result < 0) {
- TRACE(ft_t_err, "known wakeup method failed");
- }
- } else {
- wake_up_types method;
- const ft_trace_t old_tracing = TRACE_LEVEL;
- if (TRACE_LEVEL < ft_t_flow) {
- SET_TRACE_LEVEL(ft_t_bug);
- }
-
- /* Try to awaken the drive using all known methods.
- * Lower tracing for a while.
- */
- for (method=no_wake_up; method < NR_ITEMS(methods); ++method) {
- drive_type->wake_up = method;
-#ifdef CONFIG_FT_TWO_DRIVES
- /* Test setup for dual drive configuration.
- * /dev/rft2 uses mountain wakeup
- * /dev/rft3 uses colorado wakeup
- * Other systems will use the normal scheme.
- */
- if ((ft_drive_sel < 2) ||
- (ft_drive_sel == 2 && method == FT_WAKE_UP_1) ||
- (ft_drive_sel == 3 && method == FT_WAKE_UP_2)) {
- result=ftape_wakeup_drive(drive_type->wake_up);
- } else {
- result = -EIO;
- }
-#else
- result = ftape_wakeup_drive(drive_type->wake_up);
-#endif
- if (result >= 0) {
- TRACE(ft_t_warn, "drive wakeup method: %s",
- methods[drive_type->wake_up].name);
- break;
- }
- }
- SET_TRACE_LEVEL(old_tracing);
-
- if (method >= NR_ITEMS(methods)) {
- /* no response at all, cannot open this drive */
- drive_type->wake_up = unknown_wake_up;
- TRACE(ft_t_err, "no tape drive found !");
- result = -ENODEV;
- }
- }
- TRACE_EXIT result;
-}
-
-static int ftape_get_drive_status(void)
-{
- int result;
- int status;
- TRACE_FUN(ft_t_flow);
-
- ft_no_tape = ft_write_protected = 0;
- /* Tape drive is activated now.
- * First clear error status if present.
- */
- do {
- result = ftape_ready_wait(ftape_timeout.reset, &status);
- if (result < 0) {
- if (result == -ETIME) {
- TRACE(ft_t_err, "ftape_ready_wait timeout");
- } else if (result == -EINTR) {
- TRACE(ft_t_err, "ftape_ready_wait aborted");
- } else {
- TRACE(ft_t_err, "ftape_ready_wait failed");
- }
- TRACE_EXIT -EIO;
- }
- /* Clear error condition (drive is ready !)
- */
- if (status & QIC_STATUS_ERROR) {
- unsigned int error;
- qic117_cmd_t command;
-
- TRACE(ft_t_err, "error status set");
- result = ftape_report_error(&error, &command, 1);
- if (result < 0) {
- TRACE(ft_t_err,
- "report_error_code failed: %d", result);
- /* hope it's working next time */
- ftape_reset_drive();
- TRACE_EXIT -EIO;
- } else if (error != 0) {
- TRACE(ft_t_noise, "error code : %d", error);
- TRACE(ft_t_noise, "error command: %d", command);
- }
- }
- if (status & QIC_STATUS_NEW_CARTRIDGE) {
- unsigned int error;
- qic117_cmd_t command;
- const ft_trace_t old_tracing = TRACE_LEVEL;
- SET_TRACE_LEVEL(ft_t_bug);
-
- /* Undocumented feature: Must clear (not present!)
- * error here or we'll fail later.
- */
- ftape_report_error(&error, &command, 1);
-
- SET_TRACE_LEVEL(old_tracing);
- TRACE(ft_t_info, "status: new cartridge");
- ft_new_tape = 1;
- } else {
- ft_new_tape = 0;
- }
- FT_SIGNAL_EXIT(_DONT_BLOCK);
- } while (status & QIC_STATUS_ERROR);
-
- ft_no_tape = !(status & QIC_STATUS_CARTRIDGE_PRESENT);
- ft_write_protected = (status & QIC_STATUS_WRITE_PROTECT) != 0;
- if (ft_no_tape) {
- TRACE(ft_t_warn, "no cartridge present");
- } else {
- if (ft_write_protected) {
- TRACE(ft_t_noise, "Write protected cartridge");
- }
- }
- TRACE_EXIT 0;
-}
-
-static void ftape_log_vendor_id(void)
-{
- int vendor_index;
- TRACE_FUN(ft_t_flow);
-
- ftape_report_vendor_id(&ft_drive_type.vendor_id);
- vendor_index = lookup_vendor_id(ft_drive_type.vendor_id);
- if (ft_drive_type.vendor_id == UNKNOWN_VENDOR &&
- ft_drive_type.wake_up == wake_up_colorado) {
- vendor_index = 0;
- /* hack to get rid of all this mail */
- ft_drive_type.vendor_id = 0;
- }
- if (vendor_index < 0) {
- /* Unknown vendor id, first time opening device. The
- * drive_type remains set to type found at wakeup
- * time, this will probably keep the driver operating
- * for this new vendor.
- */
- TRACE(ft_t_warn, "\n"
- KERN_INFO "============ unknown vendor id ===========\n"
- KERN_INFO "A new, yet unsupported tape drive is found\n"
- KERN_INFO "Please report the following values:\n"
- KERN_INFO " Vendor id : 0x%04x\n"
- KERN_INFO " Wakeup method : %s\n"
- KERN_INFO "And a description of your tape drive\n"
- KERN_INFO "to "THE_FTAPE_MAINTAINER"\n"
- KERN_INFO "==========================================",
- ft_drive_type.vendor_id,
- methods[ft_drive_type.wake_up].name);
- ft_drive_type.speed = 0; /* unknown */
- } else {
- ft_drive_type.name = vendors[vendor_index].name;
- ft_drive_type.speed = vendors[vendor_index].speed;
- TRACE(ft_t_info, "tape drive type: %s", ft_drive_type.name);
- /* scan all methods for this vendor_id in table */
- while(ft_drive_type.wake_up != vendors[vendor_index].wake_up) {
- if (vendor_index < NR_ITEMS(vendors) - 1 &&
- vendors[vendor_index + 1].vendor_id
- ==
- ft_drive_type.vendor_id) {
- ++vendor_index;
- } else {
- break;
- }
- }
- if (ft_drive_type.wake_up != vendors[vendor_index].wake_up) {
- TRACE(ft_t_warn, "\n"
- KERN_INFO "==========================================\n"
- KERN_INFO "wakeup type mismatch:\n"
- KERN_INFO "found: %s, expected: %s\n"
- KERN_INFO "please report this to "THE_FTAPE_MAINTAINER"\n"
- KERN_INFO "==========================================",
- methods[ft_drive_type.wake_up].name,
- methods[vendors[vendor_index].wake_up].name);
- }
- }
- TRACE_EXIT;
-}
-
-void ftape_calc_timeouts(unsigned int qic_std,
- unsigned int data_rate,
- unsigned int tape_len)
-{
- int speed; /* deci-ips ! */
- int ff_speed;
- int length;
- TRACE_FUN(ft_t_any);
-
- /* tape transport speed
- * data rate: QIC-40 QIC-80 QIC-3010 QIC-3020
- *
- * 250 Kbps 25 ips n/a n/a n/a
- * 500 Kbps 50 ips 34 ips 22.6 ips n/a
- * 1 Mbps n/a 68 ips 45.2 ips 22.6 ips
- * 2 Mbps n/a n/a n/a 45.2 ips
- *
- * fast tape transport speed is at least 68 ips.
- */
- switch (qic_std) {
- case QIC_TAPE_QIC40:
- speed = (data_rate == 250) ? 250 : 500;
- break;
- case QIC_TAPE_QIC80:
- speed = (data_rate == 500) ? 340 : 680;
- break;
- case QIC_TAPE_QIC3010:
- speed = (data_rate == 500) ? 226 : 452;
- break;
- case QIC_TAPE_QIC3020:
- speed = (data_rate == 1000) ? 226 : 452;
- break;
- default:
- TRACE(ft_t_bug, "Unknown qic_std (bug) ?");
- speed = 500;
- break;
- }
- if (ft_drive_type.speed == 0) {
- unsigned long t0;
- static int dt = 0; /* keep gcc from complaining */
- static int first_time = 1;
-
- /* Measure the time it takes to wind to EOT and back to BOT.
- * If the tape length is known, calculate the rewind speed.
- * Else keep the time value for calculation of the rewind
- * speed later on, when the length _is_ known.
- * Ask for a report only when length and speed are both known.
- */
- if (first_time) {
- ftape_seek_to_bot();
- t0 = jiffies;
- ftape_seek_to_eot();
- ftape_seek_to_bot();
- dt = (int) (((jiffies - t0) * FT_USPT) / 1000);
- if (dt < 1) {
- dt = 1; /* prevent div by zero on failures */
- }
- first_time = 0;
- TRACE(ft_t_info,
- "trying to determine seek timeout, got %d msec",
- dt);
- }
- if (tape_len != 0) {
- ft_drive_type.speed =
- (2 * 12 * tape_len * 1000) / dt;
- TRACE(ft_t_warn, "\n"
- KERN_INFO "==========================================\n"
- KERN_INFO "drive type: %s\n"
- KERN_INFO "delta time = %d ms, length = %d ft\n"
- KERN_INFO "has a maximum tape speed of %d ips\n"
- KERN_INFO "please report this to "THE_FTAPE_MAINTAINER"\n"
- KERN_INFO "==========================================",
- ft_drive_type.name, dt, tape_len,
- ft_drive_type.speed);
- }
- }
- /* Handle unknown length tapes as very long ones. We'll
- * determine the actual length from a header segment later.
- * This is normal for all modern (Wide,TR1/2/3) formats.
- */
- if (tape_len <= 0) {
- TRACE(ft_t_noise,
- "Unknown tape length, using maximal timeouts");
- length = QIC_TOP_TAPE_LEN; /* use worst case values */
- } else {
- length = tape_len; /* use actual values */
- }
- if (ft_drive_type.speed == 0) {
- ff_speed = speed;
- } else {
- ff_speed = ft_drive_type.speed;
- }
- /* time to go from bot to eot at normal speed (data rate):
- * time = (1+delta) * length (ft) * 12 (inch/ft) / speed (ips)
- * delta = 10 % for seek speed, 20 % for rewind speed.
- */
- ftape_timeout.seek = (length * 132 * FT_SECOND) / speed;
- ftape_timeout.rewind = (length * 144 * FT_SECOND) / (10 * ff_speed);
- ftape_timeout.reset = 20 * FT_SECOND + ftape_timeout.rewind;
- TRACE(ft_t_noise, "timeouts for speed = %d, length = %d\n"
- KERN_INFO "seek timeout : %d sec\n"
- KERN_INFO "rewind timeout: %d sec\n"
- KERN_INFO "reset timeout : %d sec",
- speed, length,
- (ftape_timeout.seek + 500) / 1000,
- (ftape_timeout.rewind + 500) / 1000,
- (ftape_timeout.reset + 500) / 1000);
- TRACE_EXIT;
-}
-
-/* This function calibrates the datarate (i.e. determines the maximal
- * usable data rate) and sets the global variable ft_qic_std to qic_std
- *
- */
-int ftape_calibrate_data_rate(unsigned int qic_std)
-{
- int rate = ft_fdc_rate_limit;
- int result;
- TRACE_FUN(ft_t_flow);
-
- ft_qic_std = qic_std;
-
- if (ft_qic_std == -1) {
- TRACE_ABORT(-EIO, ft_t_err,
- "Unable to determine data rate if QIC standard is unknown");
- }
-
- /* Select highest rate supported by both fdc and drive.
- * Start with highest rate supported by the fdc.
- */
- while (fdc_set_data_rate(rate) < 0 && rate > 250) {
- rate /= 2;
- }
- TRACE(ft_t_info,
- "Highest FDC supported data rate: %d Kbps", rate);
- ft_fdc_max_rate = rate;
- do {
- result = ftape_set_data_rate(rate, ft_qic_std);
- } while (result == -EINVAL && (rate /= 2) > 250);
- if (result < 0) {
- TRACE_ABORT(-EIO, ft_t_err, "set datarate failed");
- }
- ft_data_rate = rate;
- TRACE_EXIT 0;
-}
-
-static int ftape_init_drive(void)
-{
- int status;
- qic_model model;
- unsigned int qic_std;
- unsigned int data_rate;
- TRACE_FUN(ft_t_flow);
-
- ftape_init_drive_needed = 0; /* don't retry if this fails ? */
- TRACE_CATCH(ftape_report_raw_drive_status(&status),);
- if (status & QIC_STATUS_CARTRIDGE_PRESENT) {
- if (!(status & QIC_STATUS_AT_BOT)) {
- /* Antique drives will get here after a soft reset,
- * modern ones only if the driver is loaded when the
- * tape wasn't rewound properly.
- */
- /* Tape should be at bot if new cartridge ! */
- ftape_seek_to_bot();
- }
- if (!(status & QIC_STATUS_REFERENCED)) {
- TRACE(ft_t_flow, "starting seek_load_point");
- TRACE_CATCH(ftape_command_wait(QIC_SEEK_LOAD_POINT,
- ftape_timeout.reset,
- &status),);
- }
- }
- ft_formatted = (status & QIC_STATUS_REFERENCED) != 0;
- if (!ft_formatted) {
- TRACE(ft_t_warn, "Warning: tape is not formatted !");
- }
-
- /* report configuration aborts when ftape_tape_len == -1
- * unknown qic_std is okay if not formatted.
- */
- TRACE_CATCH(ftape_report_configuration(&model,
- &data_rate,
- &qic_std,
- &ftape_tape_len),);
-
- /* Maybe add the following to the /proc entry
- */
- TRACE(ft_t_info, "%s drive @ %d Kbps",
- (model == prehistoric) ? "prehistoric" :
- ((model == pre_qic117c) ? "pre QIC-117C" :
- ((model == post_qic117b) ? "post QIC-117B" :
- "post QIC-117D")), data_rate);
-
- if (ft_formatted) {
- /* initialize ft_used_data_rate to maximum value
- * and set ft_qic_std
- */
- TRACE_CATCH(ftape_calibrate_data_rate(qic_std),);
- if (ftape_tape_len == 0) {
- TRACE(ft_t_info, "unknown length QIC-%s tape",
- (ft_qic_std == QIC_TAPE_QIC40) ? "40" :
- ((ft_qic_std == QIC_TAPE_QIC80) ? "80" :
- ((ft_qic_std == QIC_TAPE_QIC3010)
- ? "3010" : "3020")));
- } else {
- TRACE(ft_t_info, "%d ft. QIC-%s tape", ftape_tape_len,
- (ft_qic_std == QIC_TAPE_QIC40) ? "40" :
- ((ft_qic_std == QIC_TAPE_QIC80) ? "80" :
- ((ft_qic_std == QIC_TAPE_QIC3010)
- ? "3010" : "3020")));
- }
- ftape_calc_timeouts(ft_qic_std, ft_data_rate, ftape_tape_len);
- /* soft write-protect QIC-40/QIC-80 cartridges used with a
- * Colorado T3000 drive. Buggy hardware!
- */
- if ((ft_drive_type.vendor_id == 0x011c6) &&
- ((ft_qic_std == QIC_TAPE_QIC40 ||
- ft_qic_std == QIC_TAPE_QIC80) &&
- !ft_write_protected)) {
- TRACE(ft_t_warn, "\n"
- KERN_INFO "The famous Colorado T3000 bug:\n"
- KERN_INFO "%s drives can't write QIC40 and QIC80\n"
- KERN_INFO "cartridges but don't set the write-protect flag!",
- ft_drive_type.name);
- ft_write_protected = 1;
- }
- } else {
- /* Doesn't make too much sense to set the data rate
- * because we don't know what to use for the write
- * precompensation.
- * Need to do this again when formatting the cartridge.
- */
- ft_data_rate = data_rate;
- ftape_calc_timeouts(QIC_TAPE_QIC40,
- data_rate,
- ftape_tape_len);
- }
- ftape_new_cartridge();
- TRACE_EXIT 0;
-}
-
-static void ftape_munmap(void)
-{
- int i;
- TRACE_FUN(ft_t_flow);
-
- for (i = 0; i < ft_nr_buffers; i++) {
- ft_buffer[i]->mmapped = 0;
- }
- TRACE_EXIT;
-}
-
-/* Map the dma buffers into the virtual address range given by vma.
- * We only check the caller doesn't map non-existent buffers. We
- * don't check for multiple mappings.
- */
-int ftape_mmap(struct vm_area_struct *vma)
-{
- int num_buffers;
- int i;
- TRACE_FUN(ft_t_flow);
-
- if (ft_failure) {
- TRACE_EXIT -ENODEV;
- }
- if (!(vma->vm_flags & (VM_READ|VM_WRITE))) {
- TRACE_ABORT(-EINVAL, ft_t_err, "Undefined mmap() access");
- }
- if (vma_get_pgoff(vma) != 0) {
- TRACE_ABORT(-EINVAL, ft_t_err, "page offset must be 0");
- }
- if ((vma->vm_end - vma->vm_start) % FT_BUFF_SIZE != 0) {
- TRACE_ABORT(-EINVAL, ft_t_err,
- "size = %ld, should be a multiple of %d",
- vma->vm_end - vma->vm_start,
- FT_BUFF_SIZE);
- }
- num_buffers = (vma->vm_end - vma->vm_start) / FT_BUFF_SIZE;
- if (num_buffers > ft_nr_buffers) {
- TRACE_ABORT(-EINVAL,
- ft_t_err, "size = %ld, should be less than %d",
- vma->vm_end - vma->vm_start,
- ft_nr_buffers * FT_BUFF_SIZE);
- }
- if (ft_driver_state != idle) {
- /* this also clears the buffer states
- */
- ftape_abort_operation();
- } else {
- ftape_reset_buffer();
- }
- for (i = 0; i < num_buffers; i++) {
- unsigned long pfn;
-
- pfn = virt_to_phys(ft_buffer[i]->address) >> PAGE_SHIFT;
- TRACE_CATCH(remap_pfn_range(vma, vma->vm_start +
- i * FT_BUFF_SIZE,
- pfn,
- FT_BUFF_SIZE,
- vma->vm_page_prot),
- _res = -EAGAIN);
- TRACE(ft_t_noise, "remapped dma buffer @ %p to location @ %p",
- ft_buffer[i]->address,
- (void *)(vma->vm_start + i * FT_BUFF_SIZE));
- }
- for (i = 0; i < num_buffers; i++) {
- memset(ft_buffer[i]->address, 0xAA, FT_BUFF_SIZE);
- ft_buffer[i]->mmapped++;
- }
- TRACE_EXIT 0;
-}
-
-static void ftape_init_driver(void); /* forward declaration */
-
-/* OPEN routine called by kernel-interface code
- */
-int ftape_enable(int drive_selection)
-{
- TRACE_FUN(ft_t_any);
-
- if (ft_drive_sel == -1 || ft_drive_sel != drive_selection) {
- /* Other selection than last time
- */
- ftape_init_driver();
- }
- ft_drive_sel = FTAPE_SEL(drive_selection);
- ft_failure = 0;
- TRACE_CATCH(fdc_init(),); /* init & detect fdc */
- TRACE_CATCH(ftape_activate_drive(&ft_drive_type),
- fdc_disable();
- fdc_release_irq_and_dma();
- fdc_release_regions());
- TRACE_CATCH(ftape_get_drive_status(), ftape_detach_drive());
- if (ft_drive_type.vendor_id == UNKNOWN_VENDOR) {
- ftape_log_vendor_id();
- }
- if (ft_new_tape) {
- ftape_init_drive_needed = 1;
- }
- if (!ft_no_tape && ftape_init_drive_needed) {
- TRACE_CATCH(ftape_init_drive(), ftape_detach_drive());
- }
- ftape_munmap(); /* clear the mmap flag */
- clear_history();
- TRACE_EXIT 0;
-}
-
-/* release routine called by the high level interface modules
- * zftape or sftape.
- */
-void ftape_disable(void)
-{
- int i;
- TRACE_FUN(ft_t_any);
-
- for (i = 0; i < ft_nr_buffers; i++) {
- if (ft_buffer[i]->mmapped) {
- TRACE(ft_t_noise, "first byte of buffer %d: 0x%02x",
- i, *ft_buffer[i]->address);
- }
- }
- if (sigtestsetmask(&current->pending.signal, _DONT_BLOCK) &&
- !(sigtestsetmask(&current->pending.signal, _NEVER_BLOCK)) &&
- ftape_tape_running) {
- TRACE(ft_t_warn,
- "Interrupted by fatal signal and tape still running");
- ftape_dumb_stop();
- ftape_abort_operation(); /* it's annoying */
- } else {
- ftape_set_state(idle);
- }
- ftape_detach_drive();
- if (ft_history.used) {
- TRACE(ft_t_info, "== Non-fatal errors this run: ==");
- TRACE(ft_t_info, "fdc isr statistics:\n"
- KERN_INFO " id_am_errors : %3d\n"
- KERN_INFO " id_crc_errors : %3d\n"
- KERN_INFO " data_am_errors : %3d\n"
- KERN_INFO " data_crc_errors : %3d\n"
- KERN_INFO " overrun_errors : %3d\n"
- KERN_INFO " no_data_errors : %3d\n"
- KERN_INFO " retries : %3d",
- ft_history.id_am_errors, ft_history.id_crc_errors,
- ft_history.data_am_errors, ft_history.data_crc_errors,
- ft_history.overrun_errors, ft_history.no_data_errors,
- ft_history.retries);
- if (ft_history.used & 1) {
- TRACE(ft_t_info, "ecc statistics:\n"
- KERN_INFO " crc_errors : %3d\n"
- KERN_INFO " crc_failures : %3d\n"
- KERN_INFO " ecc_failures : %3d\n"
- KERN_INFO " sectors corrected: %3d",
- ft_history.crc_errors, ft_history.crc_failures,
- ft_history.ecc_failures, ft_history.corrected);
- }
- if (ft_history.defects > 0) {
- TRACE(ft_t_warn, "Warning: %d media defects!",
- ft_history.defects);
- }
- if (ft_history.rewinds > 0) {
- TRACE(ft_t_info, "tape motion statistics:\n"
- KERN_INFO "repositions : %3d",
- ft_history.rewinds);
- }
- }
- ft_failure = 1;
- TRACE_EXIT;
-}
-
-static void ftape_init_driver(void)
-{
- TRACE_FUN(ft_t_flow);
-
- ft_drive_type.vendor_id = UNKNOWN_VENDOR;
- ft_drive_type.speed = 0;
- ft_drive_type.wake_up = unknown_wake_up;
- ft_drive_type.name = "Unknown";
-
- ftape_timeout.seek = 650 * FT_SECOND;
- ftape_timeout.reset = 670 * FT_SECOND;
- ftape_timeout.rewind = 650 * FT_SECOND;
- ftape_timeout.head_seek = 15 * FT_SECOND;
- ftape_timeout.stop = 5 * FT_SECOND;
- ftape_timeout.pause = 16 * FT_SECOND;
-
- ft_qic_std = -1;
- ftape_tape_len = 0; /* unknown */
- ftape_current_command = 0;
- ftape_current_cylinder = -1;
-
- ft_segments_per_track = 102;
- ftape_segments_per_head = 1020;
- ftape_segments_per_cylinder = 4;
- ft_tracks_per_tape = 20;
-
- ft_failure = 1;
-
- ft_formatted = 0;
- ft_no_tape = 1;
- ft_write_protected = 1;
- ft_new_tape = 1;
-
- ft_driver_state = idle;
-
- ft_data_rate =
- ft_fdc_max_rate = 500;
- ft_drive_max_rate = 0; /* triggers set_rate_test() */
-
- ftape_init_drive_needed = 1;
-
- ft_header_segment_1 = -1;
- ft_header_segment_2 = -1;
- ft_used_header_segment = -1;
- ft_first_data_segment = -1;
- ft_last_data_segment = -1;
-
- ft_location.track = -1;
- ft_location.known = 0;
-
- ftape_tape_running = 0;
- ftape_might_be_off_track = 1;
-
- ftape_new_cartridge(); /* init some tape related variables */
- ftape_init_bsm();
- TRACE_EXIT;
-}