patch-2.1.66 linux/drivers/char/ftape/ftape-ctl.c
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- Lines: 884
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.1.65/linux/drivers/char/ftape/ftape-ctl.c
- Orig date:
Tue Oct 29 15:40:36 1996
diff -u --recursive --new-file v2.1.65/linux/drivers/char/ftape/ftape-ctl.c linux/drivers/char/ftape/ftape-ctl.c
@@ -1,883 +0,0 @@
-/*
- * Copyright (C) 1993-1995 Bas Laarhoven.
-
- 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.
-
- *
- * This file contains the non-read/write ftape functions
- * for the QIC-40/80 floppy-tape driver for Linux.
- */
-
-#include <linux/errno.h>
-#include <linux/mm.h>
-#include <linux/ftape.h>
-#include <asm/uaccess.h>
-
-#include "tracing.h"
-#include "ftape-eof.h"
-#include "ftape-io.h"
-#include "ftape-ctl.h"
-#include "ftape-write.h"
-#include "ftape-read.h"
-#include "ftape-rw.h"
-#include "qic117.h"
-#include "ftape-bsm.h"
-
-
-/* Global vars.
- */
-int segments_per_track = 102;
-int segments_per_head = 1020;
-int segments_per_cylinder = 4;
-int tracks_per_tape = 20;
-int ftape_failure = 1;
-int ftape_seg_pos = 0;
-int first_data_segment = -1;
-int ftape_state = idle; /* use buffer_state_enum */
-history_record history;
-int write_protected;
-int ftape_offline = 0;
-int no_tape = 1;
-int formatted = 0;
-int ftape_data_rate = 0;
-int going_offline = 0;
-int read_only = 0;
-
-/* Local vars.
- */
-static int ftape_last_error = 0;
-static const vendor_struct vendors[] = QIC117_VENDORS;
-static const wakeup_method methods[] = WAKEUP_METHODS;
-static int init_drive_needed = 1;
-
-
-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)
-{
- TRACE_FUN(8, "ftape_seek_to_eot");
- int result;
- int status;
-
- result = ftape_ready_wait(timeout.pause, &status);
- while ((status & QIC_STATUS_AT_EOT) == 0) {
- if (result < 0) {
- TRACE(1, "failed");
- TRACE_EXIT;
- return result;
- }
- if (ftape_not_operational(status)) {
- TRACE_EXIT;
- return -EIO;
- }
- result = ftape_command_wait(QIC_PHYSICAL_FORWARD,
- timeout.rewind, &status);
- }
- TRACE_EXIT;
- return 0;
-}
-
-int ftape_seek_to_bot(void)
-{
- TRACE_FUN(8, "ftape_seek_to_bot");
- int result;
- int status;
-
- result = ftape_ready_wait(timeout.pause, &status);
- while ((status & QIC_STATUS_AT_BOT) == 0) {
- if (result < 0) {
- TRACE(1, "failed");
- TRACE_EXIT;
- return result;
- }
- if (ftape_not_operational(status)) {
- TRACE_EXIT;
- return -EIO;
- }
- result = ftape_command_wait(QIC_PHYSICAL_REVERSE,
- timeout.rewind, &status);
- }
- TRACE_EXIT;
- return 0;
-}
-
-void ftape_reset_position(void)
-{
- ftape_seg_pos = first_data_segment;
- reset_eof_list();
-}
-
-int ftape_new_cartridge(void)
-{
- location.track = -1; /* force seek on first access */
- first_data_segment = -1; /* unknown */
- ftape_zap_read_buffers();
- ftape_zap_write_buffers();
- ftape_reset_position();
- return 0;
-}
-
-int ftape_abort_operation(void)
-{
- TRACE_FUN(5, "ftape_abort_operation");
- int result = 0;
- int i;
- int status;
-
- if (runner_status == running) {
- TRACE(5, "aborting runner, waiting");
- 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 (result == 0) {
- runner_status = idle;
- }
- }
- if (runner_status != idle) {
- if (runner_status == do_abort) {
- TRACE(5, "forcing runner abort");
- }
- TRACE(5, "stopping tape");
- result = ftape_command_wait(QIC_STOP_TAPE, timeout.stop, &status);
- location.known = 0;
- runner_status = idle;
- }
- for (i = 0; i < NR_BUFFERS; ++i) {
- buffer[i].status = waiting;
- }
- head = tail = 0;
- TRACE_EXIT;
- return result;
-}
-
-int lookup_vendor_id(int vendor_id)
-{
- int i = 0;
-
- while (vendors[i].vendor_id != vendor_id) {
- if (++i >= NR_ITEMS(vendors)) {
- return -1;
- }
- }
- return i;
-}
-
-void ftape_detach_drive(void)
-{
- TRACE_FUN(8, "ftape_detach_drive");
-
- TRACE(5, "disabling tape drive and fdc");
- ftape_put_drive_to_sleep(drive_type);
- fdc_catch_stray_interrupts(1); /* one always comes */
- fdc_disable();
- fdc_release_irq_and_dma();
- TRACE_EXIT;
-}
-
-static void clear_history(void)
-{
- history.used = 0;
- history.id_am_errors =
- history.id_crc_errors =
- history.data_am_errors =
- history.data_crc_errors =
- history.overrun_errors =
- history.no_data_errors =
- history.retries =
- history.crc_errors =
- history.crc_failures =
- history.ecc_failures =
- history.corrected =
- history.defects =
- history.rewinds = 0;
-}
-
-int ftape_activate_drive(vendor_struct * drive_type)
-{
- TRACE_FUN(5, "ftape_activate_drive");
- int result = 0;
-
- /* 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(5, "enabling tape drive and fdc");
- result = ftape_wakeup_drive(drive_type->wake_up);
- if (result < 0) {
- TRACE(1, "known wakeup method failed");
- }
- } else {
- int old_tracing = tracing;
- wake_up_types method;
-
- /* Try to awaken the drive using all known methods.
- * Lower tracing for a while.
- */
- if (tracing <= 4) {
- tracing = 0;
- }
- for (method = no_wake_up; method < NR_ITEMS(methods); ++method) {
- drive_type->wake_up = method;
-#if 0
- /* Test setup for dual drive configuration in dodo.
- * /dev/rft2 uses mountain wakeup only -> Archive QIC-80
- * /dev/rft3 uses colorado wakeup only -> Jumbo QIC-40
- * Other systems will use the normal scheme.
- */
- if ((FTAPE_UNIT < 2) ||
- (FTAPE_UNIT == 2 && method == wake_up_mountain) ||
- (FTAPE_UNIT == 3 && method == wake_up_colorado)) {
- result = ftape_wakeup_drive(drive_type->wake_up);
- } else {
- result = -EIO;
- }
-#else
- result = ftape_wakeup_drive(drive_type->wake_up);
-#endif
- if (result >= 0) {
- int tracing = old_tracing; /* fool TRACE */
- TRACEx1(2, "drive wakeup method: %s",
- methods[drive_type->wake_up].name);
- break;
- }
- }
- tracing = old_tracing;
- if (method >= NR_ITEMS(methods)) {
- /* no response at all, cannot open this drive */
- drive_type->wake_up = unknown_wake_up;
- TRACE(1, "no tape drive found !");
- tracing = old_tracing;
- result = -ENODEV;
- }
- }
- TRACE_EXIT;
- return result;
-}
-
-int ftape_get_drive_status(int *new_tape, int *no_tape, int *wp_tape)
-{
- TRACE_FUN(5, "ftape_get_drive_status");
- int result;
- int status;
-
- *no_tape =
- *wp_tape = 0;
- /* Tape drive is activated now.
- * First clear error status if present.
- */
- do {
- result = ftape_ready_wait(timeout.reset, &status);
- if (result < 0) {
- if (result == -ETIME) {
- TRACE(1, "ftape_ready_wait timeout");
- } else if (result == -EINTR) {
- TRACE(1, "ftape_ready_wait aborted");
- } else {
- TRACE(1, "ftape_ready_wait failed");
- }
- result = -EIO;
- break;
- }
- /* Clear error condition (drive is ready !)
- */
- if (status & QIC_STATUS_ERROR) {
- int error;
- int command;
-
- TRACE(1, "error status set");
- result = ftape_report_error(&error, &command, 1);
- if (result < 0) {
- TRACEi(1, "report_error_code failed:", result);
- ftape_reset_drive(); /* hope it's working next time */
- init_drive_needed = 1;
- result = -EIO;
- break;
- } else if (error != 0) {
- TRACEi(4, "error code :", error);
- TRACEi(4, "error command:", command);
- }
- }
- if (status & QIC_STATUS_NEW_CARTRIDGE) {
- int error;
- int command;
- int old_tracing = tracing;
-
- /* Undocumented feature: Must clear (not present!) error
- * here or we'll fail later.
- */
- tracing = 0;
- ftape_report_error(&error, &command, 1);
- tracing = old_tracing;
- TRACE(3, "status: new cartridge");
- *new_tape = 1;
- }
- } while (status & QIC_STATUS_ERROR);
-
- *no_tape = !(status & QIC_STATUS_CARTRIDGE_PRESENT);
- *wp_tape = (status & QIC_STATUS_WRITE_PROTECT);
- if (*no_tape) {
- TRACE(1, "no cartridge present");
- } else {
- if (*wp_tape) {
- TRACE(2, "Write protected cartridge");
- }
- }
- TRACE_EXIT;
- return result;
-}
-
-void ftape_log_vendor_id(void)
-{
- TRACE_FUN(5, "ftape_log_vendor_id");
- int vendor_index;
-
- ftape_report_vendor_id(&drive_type.vendor_id);
- vendor_index = lookup_vendor_id(drive_type.vendor_id);
- if (drive_type.vendor_id == UNKNOWN_VENDOR &&
- drive_type.wake_up == wake_up_colorado) {
- vendor_index = 0;
- drive_type.vendor_id = 0; /* hack to get rid of all this mail */
- }
- 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(-1, "============ unknown vendor id ===========");
- TRACE(-1, "A new, yet unsupported tape drive is found");
- TRACE(-1, "Please report the following values:");
- TRACEx1(-1, " Vendor id : 0x%04x", drive_type.vendor_id);
- TRACEx1(-1, " Wakeup method : %s", methods[drive_type.wake_up].name);
- TRACE(-1, "And a description of your tape drive to:");
- TRACE(-1, "Kai Harrekilde-Petersen <khp@dolphinics.no>");
- TRACE(-1, "==========================================");
- drive_type.speed = 500; /* deci-ips: very safe value */
- } else {
- drive_type.name = vendors[vendor_index].name;
- drive_type.speed = vendors[vendor_index].speed;
- TRACEx1(3, "tape drive type: %s", drive_type.name);
- /* scan all methods for this vendor_id in table */
- while (drive_type.wake_up != vendors[vendor_index].wake_up) {
- if (vendor_index < NR_ITEMS(vendors) - 1 &&
- vendors[vendor_index + 1].vendor_id == drive_type.vendor_id) {
- ++vendor_index;
- } else {
- break;
- }
- }
- if (drive_type.wake_up != vendors[vendor_index].wake_up) {
- TRACE(-1, "==========================================");
- TRACE(-1, "wakeup type mismatch:");
- TRACEx2(-1, "found: %s, expected: %s",
- methods[drive_type.wake_up].name,
- methods[vendors[vendor_index].wake_up].name);
- TRACE(-1, "please report this to <khp@dolphinics.no>");
- TRACE(-1, "==========================================");
- }
- }
- TRACE_EXIT;
-}
-
-void ftape_calc_timeouts(void)
-{
- TRACE_FUN(8, "ftape_calc_timeouts");
- int speed; /* deci-ips ! */
- int length;
-
- /* 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 = (ftape_data_rate == 3) ? 250 : 500;
- break;
- case QIC_TAPE_QIC80:
- speed = (ftape_data_rate == 2) ? 340 : 680;
- break;
- case QIC_TAPE_QIC3010:
- speed = (ftape_data_rate == 2) ? 226 : 452;
- break;
- case QIC_TAPE_QIC3020:
- speed = (ftape_data_rate == 1) ? 226 : 452;
- break;
- default:
- TRACE(-1, "Unknown qic_std (bug) ?");
- speed = 500;
- break;
- }
- if (tape_len <= 0) {
- /* Handle unknown length tapes as 1100 ft ones (worst case)
- */
- TRACE(1, "Unknown tape length, using worst case timing values!");
- length = 1100;
- } else {
- length = tape_len;
- }
- if (drive_type.speed == 0) {
- unsigned long t0;
- int dt;
-
- ftape_seek_to_bot();
- t0 = jiffies;
- ftape_seek_to_eot();
- ftape_seek_to_bot();
- dt = (int) ((jiffies - t0) * MSPT);
- drive_type.speed = (2 * 12 * length * 1000) / dt;
- TRACE(-1, "==========================================");
- TRACEx1(-1, "drive : %s", drive_type.name);
- TRACEx2(-1, "delta time = %d, length = %d", dt, length);
- TRACEx1(-1, "has max tape speed of %d ips", drive_type.speed);
- TRACE(-1, "please report this to <khp@dolphinics.no>");
- TRACE(-1, "==========================================");
- }
- /* 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.
- */
- timeout.seek = (length * 132 * SECOND) / speed;
- timeout.rewind = (length * 144 * SECOND) / (10 * drive_type.speed);
- timeout.reset = 20 * SECOND + timeout.rewind;
- TRACEx2(4, "speed = %d, length = %d", speed, length);
- TRACEx1(4, "seek timeout: %d sec", (timeout.seek + 500) / 1000);
- TRACEx1(4, "rewind timeout: %d sec", (timeout.rewind + 500) / 1000);
- TRACE_EXIT;
-}
-
-int ftape_init_drive(int *formatted)
-{
- TRACE_FUN(5, "ftape_init_drive");
- int result = 0;
- int status;
-
- result = ftape_report_raw_drive_status(&status);
- if (result >= 0 && (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.
- */
- ftape_seek_to_bot();
- }
- if (!(status & QIC_STATUS_REFERENCED)) {
- TRACE(5, "starting seek_load_point");
- result = ftape_command_wait(QIC_SEEK_LOAD_POINT,
- timeout.reset, &status);
- if (result < 0) {
- TRACE(1, "seek_load_point failed (command)");
- }
- }
- }
- if (result >= 0) {
- int rate;
-
- *formatted = (status & QIC_STATUS_REFERENCED);
- if (!*formatted) {
- TRACE(1, "Warning: tape is not formatted !");
- }
- /* Select highest rate supported by both fdc and drive.
- * Start with highest rate supported by the fdc.
- */
- if (fdc.type >= i82078_1)
- rate = 0;
- else if (fdc.type >= i82077)
- rate = 1;
- else
- rate = 2;
- do {
- result = ftape_set_data_rate(rate);
- if (result >= 0) {
- ftape_calc_timeouts();
- break;
- }
- ++rate;
- } while (rate < 4);
- if (result < 0) {
- result = -EIO;
- }
- }
- if (result >= 0) {
- /* Tape should be at bot if new cartridge ! */
- ftape_new_cartridge();
- }
- init_drive_needed = 0;
- TRACE_EXIT;
- return result;
-}
-
-/* OPEN routine called by kernel-interface code
- */
-int _ftape_open(void)
-{
- TRACE_FUN(8, "_ftape_open");
- int result;
- static int new_tape = 1;
-
- result = fdc_init();
- if (result >= 0) {
- result = ftape_activate_drive(&drive_type);
- if (result < 0) {
- fdc_disable();
- fdc_release_irq_and_dma();
-
- } else {
- result = ftape_get_drive_status(&new_tape, &no_tape, &write_protected);
- if (result < 0) {
- ftape_detach_drive();
- } else {
- if (drive_type.vendor_id == UNKNOWN_VENDOR) {
- ftape_log_vendor_id();
- }
- if (no_tape) {
- ftape_offline = 1;
- } else if (new_tape) {
- ftape_offline = 0;
- init_drive_needed = 1;
- read_only = 0; /* enable writes again */
- }
- if (!ftape_offline && init_drive_needed) {
- result = ftape_init_drive(&formatted);
- if (result >= 0) {
- new_tape = 0;
- } else {
- ftape_detach_drive();
- }
- }
- if (result >= 0) {
- clear_history();
- }
- }
- }
- }
- TRACE_EXIT;
- return result;
-}
-
-/* RELEASE routine called by kernel-interface code
- */
-int _ftape_close(void)
-{
- TRACE_FUN(8, "_ftape_close");
- int result = 0;
- int last_segment = 0;
-
- if (!ftape_offline) {
- result = ftape_flush_buffers();
- last_segment = ftape_seg_pos - 1;
- if (!(ftape_unit & FTAPE_NO_REWIND)) {
- if (result >= 0) {
- result = ftape_update_header_segments(NULL, 1);
- if (result < 0) {
- TRACE(1, "error: update of header segments failed");
- }
- } else {
- TRACE(1, "error: unable to update header segments");
- }
- }
- ftape_abort_operation();
- if (!(ftape_unit & FTAPE_NO_REWIND)) {
- if (!no_tape) {
- TRACE(5, "rewinding tape");
- result = ftape_seek_to_bot();
- }
- ftape_reset_position();
- ftape_zap_read_buffers();
- ftape_zap_write_buffers();
- }
- }
- ftape_detach_drive();
- fdc_uninit();
- if (history.used) {
- TRACE(3, "== Non-fatal errors this run: ==");
- TRACE(3, "fdc isr statistics:");
- TRACEi(3, " id_am_errors :", history.id_am_errors);
- TRACEi(3, " id_crc_errors :", history.id_crc_errors);
- TRACEi(3, " data_am_errors :", history.data_am_errors);
- TRACEi(3, " data_crc_errors :", history.data_crc_errors);
- TRACEi(3, " overrun_errors :", history.overrun_errors);
- TRACEi(3, " no_data_errors :", history.no_data_errors);
- TRACEi(3, " retries :", history.retries);
- if (history.used & 1) {
- TRACE(3, "ecc statistics:");
- TRACEi(3, " crc_errors :", history.crc_errors);
- TRACEi(3, " crc_failures :", history.crc_failures);
- TRACEi(3, " ecc_failures :", history.ecc_failures);
- TRACEi(3, " sectors corrected:", history.corrected);
- }
- TRACEx2(3, "media defects : %d%s", history.defects,
- history.defects ? " !!!" : "");
- TRACEi(3, "repositions :", history.rewinds);
- TRACEi(3, "last segment :", last_segment);
- }
- if (going_offline) {
- going_offline = 0;
- ftape_offline = 1;
- }
- TRACE_EXIT;
- return result;
-}
-
-/* IOCTL routine called by kernel-interface code
- */
-int _ftape_ioctl(unsigned int command, void *arg)
-{
- TRACE_FUN(8, "ftape_ioctl");
- int result = EINVAL;
- union {
- struct mtop mtop;
- struct mtget mtget;
- } krnl_arg;
- int arg_size = (command & IOCSIZE_MASK) >> IOCSIZE_SHIFT;
-
- /* This check will only catch arguments that are too large !
- */
- if ((command & IOC_INOUT) && arg_size > sizeof(krnl_arg)) {
- TRACEi(1, "bad argument size:", arg_size);
- TRACE_EXIT;
- return -EINVAL;
- }
- if (command & IOC_IN) {
- int error = verify_area(VERIFY_READ, arg, arg_size);
- if (error) {
- TRACE_EXIT;
- return error;
- }
- copy_from_user(&krnl_arg.mtop, arg, arg_size);
- }
- TRACEx1(5, "called with ioctl command: 0x%08x", command);
- switch (command) {
- /* cpio compatibility
- * mtrasx and mtreset are mt extension by Hennus Bergman
- * mtseek and mttell are mt extension by eddy olk
- */
- case MTIOCTOP:
- TRACEx1(5, "calling MTIOCTOP command: 0x%08x", krnl_arg.mtop.mt_op);
- switch (krnl_arg.mtop.mt_op) {
- case MTNOP:
- /* gnu mt calls MTNOP before MTIOCGET to set status */
- result = 0;
- break;
- case MTRESET:
- result = ftape_reset_drive();
- init_drive_needed = 1;
- if (result < 0 || ftape_offline) {
- break;
- }
- result = ftape_seek_to_bot();
- ftape_reset_position();
- break;
- case MTREW:
- case MTOFFL:
- if (ftape_offline) {
- result = -EIO;
- break;
- }
- ftape_flush_buffers();
- ftape_update_header_segments(NULL, 1);
- result = ftape_seek_to_bot();
- ftape_reset_position();
- if (krnl_arg.mtop.mt_op == MTOFFL) {
- going_offline = 1;
- TRACE(4, "Putting tape drive offline");
- }
- result = 0;
- break;
- case MTRETEN:
- if (ftape_offline) {
- result = -EIO;
- break;
- }
- result = ftape_seek_to_eot();
- if (result >= 0) {
- result = ftape_seek_to_bot();
- }
- ftape_reset_position();
- break;
- case MTERASE:
- if (ftape_offline) {
- result = -EIO;
- break;
- }
- result = ftape_erase();
- break;
- case MTEOM:
- if (ftape_offline) {
- result = -EIO;
- break;
- }
- result = ftape_seek_eom();
- break;
- case MTFSFM:
- if (ftape_offline) {
- result = -EIO;
- break;
- }
- eof_mark = 1; /* position ready to extend */
- case MTFSF:
- if (ftape_offline) {
- result = -EIO;
- break;
- }
- result = ftape_seek_eof(krnl_arg.mtop.mt_count);
- break;
- case MTBSFM:
- if (ftape_offline) {
- result = -EIO;
- break;
- }
- eof_mark = 1; /* position ready to extend */
- case MTBSF:
- if (ftape_offline) {
- result = -EIO;
- break;
- }
- result = ftape_seek_eof(-krnl_arg.mtop.mt_count);
- break;
- case MTFSR:
- if (ftape_offline) {
- result = -EIO;
- break;
- }
- tracing = krnl_arg.mtop.mt_count;
- TRACEx1(2, "tracing set to %d", tracing);
- result = 0;
- break;
- case MTBSR:
- if (ftape_offline) {
- result = -EIO;
- break;
- }
-#if 0
- result = ftape_fix();
-#else
- result = 0;
-#endif
- break;
- case MTWEOF:
- if (ftape_offline) {
- result = -EIO;
- break;
- }
- result = ftape_weof(krnl_arg.mtop.mt_count, ftape_seg_pos, 1);
- if (result >= 0) {
- ftape_seg_pos += krnl_arg.mtop.mt_count - 1;
- }
- break;
- /* MTRASx and MTRESET are mt extension by Hennus Bergman
- */
- case MTRAS1:
- case MTRAS2:
- case MTRAS3:
- case MTSEEK:
- case MTTELL:
- default:
- TRACEi(1, "MTIOCTOP sub-command not implemented:", krnl_arg.mtop.mt_op);
- result = -EIO;
- break;
- }
- break;
- case MTIOCGET:
- krnl_arg.mtget.mt_type = drive_type.vendor_id + 0x800000;
- krnl_arg.mtget.mt_resid = 0; /* not implemented */
- krnl_arg.mtget.mt_dsreg = 0; /* status register */
- krnl_arg.mtget.mt_gstat = /* device independent status */
- ((ftape_offline) ? 0 : GMT_ONLINE(-1L)) |
- ((write_protected) ? GMT_WR_PROT(-1L) : 0) |
- ((no_tape) ? GMT_DR_OPEN(-1L) : 0);
- krnl_arg.mtget.mt_erreg = ftape_last_error; /* error register */
- result = ftape_file_no(&krnl_arg.mtget.mt_fileno,
- &krnl_arg.mtget.mt_blkno);
- break;
- case MTIOCPOS:
- TRACE(5, "Mag tape ioctl command: MTIOCPOS");
- TRACE(1, "MTIOCPOS command not implemented");
- break;
- default:
- result = -EINVAL;
- break;
- }
- if (command & IOC_OUT) {
- int error = verify_area(VERIFY_WRITE, arg, arg_size);
- if (error) {
- TRACE_EXIT;
- return error;
- }
- copy_to_user(arg, &krnl_arg, arg_size);
- }
- TRACE_EXIT;
- return result;
-}
-
-void ftape_init_driver(void)
-{
- drive_type.vendor_id = UNKNOWN_VENDOR;
- drive_type.speed = 0;
- drive_type.wake_up = unknown_wake_up;
- drive_type.name = "Unknown";
-
- timeout.seek = 650 * SECOND;
- timeout.reset = 670 * SECOND;
- timeout.rewind = 650 * SECOND;
- timeout.head_seek = 15 * SECOND;
- timeout.stop = 5 * SECOND;
- timeout.pause = 16 * SECOND;
-
- qic_std = -1;
- tape_len = -1;
- current_command = 0;
- current_cylinder = -1;
-
- segments_per_track = 102;
- segments_per_head = 1020;
- segments_per_cylinder = 4;
- tracks_per_tape = 20;
- ftape_failure = 1;
- ftape_seg_pos = 0;
- first_data_segment = -1;
- ftape_state = idle;
- no_tape = 1;
- formatted = 0;
- ftape_data_rate = 0;
- going_offline = 0;
- read_only = 0;
-
- init_drive_needed = 1;
- header_segment_1 = -1;
- header_segment_2 = -1;
- used_header_segment = -1;
- location.track = -1;
- location.known = 0;
- tape_running = 0;
- might_be_off_track = 1;
-
- ftape_new_cartridge(); /* init some tape related variables */
- ftape_init_bsm();
-}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov