patch-2.1.66 linux/drivers/char/ftape/lowlevel/ftape-ctl.c
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- Lines: 902
- Date:
Tue Nov 25 14:45:27 1997
- Orig file:
v2.1.65/linux/drivers/char/ftape/lowlevel/ftape-ctl.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.1.65/linux/drivers/char/ftape/lowlevel/ftape-ctl.c linux/drivers/char/ftape/lowlevel/ftape-ctl.c
@@ -0,0 +1,901 @@
+/*
+ * 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/config.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/wrapper.h>
+
+#include <linux/ftape.h>
+#include <linux/qic117.h>
+#if LINUX_VERSION_CODE >= KERNEL_VER(2,1,6)
+#include <asm/uaccess.h>
+#else
+#include <asm/segment.h>
+#endif
+#include <asm/io.h>
+
+#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
+}
+
+void ftape_set_status(const ftape_info *status)
+{
+ ftape_status = *status;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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_get_flags(vma) & (VM_READ|VM_WRITE)) == 0) {
+ TRACE_ABORT(-EINVAL, ft_t_err, "Undefined mmap() access");
+ }
+ if (vma_get_offset (vma) != 0) {
+ TRACE_ABORT(-EINVAL, ft_t_err, "offset must be 0");
+ }
+ if ((vma_get_end (vma) - vma_get_start (vma)) % FT_BUFF_SIZE != 0) {
+ TRACE_ABORT(-EINVAL, ft_t_err,
+ "size = %ld, should be a multiple of %d",
+ vma_get_end (vma) - vma_get_start (vma),
+ FT_BUFF_SIZE);
+ }
+ num_buffers = (vma_get_end (vma) - vma_get_start (vma)) / FT_BUFF_SIZE;
+ if (num_buffers > ft_nr_buffers) {
+ TRACE_ABORT(-EINVAL,
+ ft_t_err, "size = %ld, should be less than %d",
+ vma_get_end (vma) - vma_get_start (vma),
+ 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++) {
+ TRACE_CATCH(remap_page_range(vma_get_start (vma) +
+ i * FT_BUFF_SIZE,
+ virt_to_phys(ft_buffer[i]->address),
+ FT_BUFF_SIZE,
+ vma_get_page_prot (vma)),
+ _res = -EAGAIN);
+ TRACE(ft_t_noise, "remapped dma buffer @ %p to location @ %p",
+ ft_buffer[i]->address,
+ (void *)(vma_get_start(vma) + 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 ((current->signal & _DONT_BLOCK) &&
+ !(current->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;
+}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov