Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/s390/char/tape_34xx.c b/drivers/s390/char/tape_34xx.c
new file mode 100644
index 0000000..480ec87
--- /dev/null
+++ b/drivers/s390/char/tape_34xx.c
@@ -0,0 +1,1385 @@
+/*
+ * drivers/s390/char/tape_34xx.c
+ * tape device discipline for 3480/3490 tapes.
+ *
+ * S390 and zSeries version
+ * Copyright (C) 2001,2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Author(s): Carsten Otte <cotte@de.ibm.com>
+ * Tuan Ngo-Anh <ngoanh@de.ibm.com>
+ * Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/bio.h>
+#include <linux/workqueue.h>
+
+#define TAPE_DBF_AREA tape_34xx_dbf
+
+#include "tape.h"
+#include "tape_std.h"
+
+#define PRINTK_HEADER "TAPE_34XX: "
+
+/*
+ * Pointer to debug area.
+ */
+debug_info_t *TAPE_DBF_AREA = NULL;
+EXPORT_SYMBOL(TAPE_DBF_AREA);
+
+enum tape_34xx_type {
+ tape_3480,
+ tape_3490,
+};
+
+#define TAPE34XX_FMT_3480 0
+#define TAPE34XX_FMT_3480_2_XF 1
+#define TAPE34XX_FMT_3480_XF 2
+
+struct tape_34xx_block_id {
+ unsigned int wrap : 1;
+ unsigned int segment : 7;
+ unsigned int format : 2;
+ unsigned int block : 22;
+};
+
+/*
+ * A list of block ID's is used to faster seek blocks.
+ */
+struct tape_34xx_sbid {
+ struct list_head list;
+ struct tape_34xx_block_id bid;
+};
+
+static void tape_34xx_delete_sbid_from(struct tape_device *, int);
+
+/*
+ * Medium sense for 34xx tapes. There is no 'real' medium sense call.
+ * So we just do a normal sense.
+ */
+static int
+tape_34xx_medium_sense(struct tape_device *device)
+{
+ struct tape_request *request;
+ unsigned char *sense;
+ int rc;
+
+ request = tape_alloc_request(1, 32);
+ if (IS_ERR(request)) {
+ DBF_EXCEPTION(6, "MSEN fail\n");
+ return PTR_ERR(request);
+ }
+
+ request->op = TO_MSEN;
+ tape_ccw_end(request->cpaddr, SENSE, 32, request->cpdata);
+
+ rc = tape_do_io_interruptible(device, request);
+ if (request->rc == 0) {
+ sense = request->cpdata;
+
+ /*
+ * This isn't quite correct. But since INTERVENTION_REQUIRED
+ * means that the drive is 'neither ready nor on-line' it is
+ * only slightly inaccurate to say there is no tape loaded if
+ * the drive isn't online...
+ */
+ if (sense[0] & SENSE_INTERVENTION_REQUIRED)
+ tape_med_state_set(device, MS_UNLOADED);
+ else
+ tape_med_state_set(device, MS_LOADED);
+
+ if (sense[1] & SENSE_WRITE_PROTECT)
+ device->tape_generic_status |= GMT_WR_PROT(~0);
+ else
+ device->tape_generic_status &= ~GMT_WR_PROT(~0);
+ } else {
+ DBF_EVENT(4, "tape_34xx: medium sense failed with rc=%d\n",
+ request->rc);
+ }
+ tape_free_request(request);
+
+ return rc;
+}
+
+/*
+ * These functions are currently used only to schedule a medium_sense for
+ * later execution. This is because we get an interrupt whenever a medium
+ * is inserted but cannot call tape_do_io* from an interrupt context.
+ * Maybe that's useful for other actions we want to start from the
+ * interrupt handler.
+ */
+static void
+tape_34xx_work_handler(void *data)
+{
+ struct {
+ struct tape_device *device;
+ enum tape_op op;
+ struct work_struct work;
+ } *p = data;
+
+ switch(p->op) {
+ case TO_MSEN:
+ tape_34xx_medium_sense(p->device);
+ break;
+ default:
+ DBF_EVENT(3, "T34XX: internal error: unknown work\n");
+ }
+
+ p->device = tape_put_device(p->device);
+ kfree(p);
+}
+
+static int
+tape_34xx_schedule_work(struct tape_device *device, enum tape_op op)
+{
+ struct {
+ struct tape_device *device;
+ enum tape_op op;
+ struct work_struct work;
+ } *p;
+
+ if ((p = kmalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
+ return -ENOMEM;
+
+ memset(p, 0, sizeof(*p));
+ INIT_WORK(&p->work, tape_34xx_work_handler, p);
+
+ p->device = tape_get_device_reference(device);
+ p->op = op;
+
+ schedule_work(&p->work);
+ return 0;
+}
+
+/*
+ * Done Handler is called when dev stat = DEVICE-END (successful operation)
+ */
+static inline int
+tape_34xx_done(struct tape_request *request)
+{
+ DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]);
+
+ switch (request->op) {
+ case TO_DSE:
+ case TO_RUN:
+ case TO_WRI:
+ case TO_WTM:
+ case TO_ASSIGN:
+ case TO_UNASSIGN:
+ tape_34xx_delete_sbid_from(request->device, 0);
+ break;
+ default:
+ ;
+ }
+ return TAPE_IO_SUCCESS;
+}
+
+static inline int
+tape_34xx_erp_failed(struct tape_request *request, int rc)
+{
+ DBF_EVENT(3, "Error recovery failed for %s (RC=%d)\n",
+ tape_op_verbose[request->op], rc);
+ return rc;
+}
+
+static inline int
+tape_34xx_erp_succeeded(struct tape_request *request)
+{
+ DBF_EVENT(3, "Error Recovery successful for %s\n",
+ tape_op_verbose[request->op]);
+ return tape_34xx_done(request);
+}
+
+static inline int
+tape_34xx_erp_retry(struct tape_request *request)
+{
+ DBF_EVENT(3, "xerp retr %s\n", tape_op_verbose[request->op]);
+ return TAPE_IO_RETRY;
+}
+
+/*
+ * This function is called, when no request is outstanding and we get an
+ * interrupt
+ */
+static int
+tape_34xx_unsolicited_irq(struct tape_device *device, struct irb *irb)
+{
+ if (irb->scsw.dstat == 0x85 /* READY */) {
+ /* A medium was inserted in the drive. */
+ DBF_EVENT(6, "xuud med\n");
+ tape_34xx_delete_sbid_from(device, 0);
+ tape_34xx_schedule_work(device, TO_MSEN);
+ } else {
+ DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id);
+ PRINT_WARN("Unsolicited IRQ (Device End) caught.\n");
+ tape_dump_sense(device, NULL, irb);
+ }
+ return TAPE_IO_SUCCESS;
+}
+
+/*
+ * Read Opposite Error Recovery Function:
+ * Used, when Read Forward does not work
+ */
+static int
+tape_34xx_erp_read_opposite(struct tape_device *device,
+ struct tape_request *request)
+{
+ if (request->op == TO_RFO) {
+ /*
+ * We did read forward, but the data could not be read
+ * *correctly*. We transform the request to a read backward
+ * and try again.
+ */
+ tape_std_read_backward(device, request);
+ return tape_34xx_erp_retry(request);
+ }
+ if (request->op != TO_RBA)
+ PRINT_ERR("read_opposite called with state:%s\n",
+ tape_op_verbose[request->op]);
+ /*
+ * We tried to read forward and backward, but hat no
+ * success -> failed.
+ */
+ return tape_34xx_erp_failed(request, -EIO);
+}
+
+static int
+tape_34xx_erp_bug(struct tape_device *device, struct tape_request *request,
+ struct irb *irb, int no)
+{
+ if (request->op != TO_ASSIGN) {
+ PRINT_WARN("An unexpected condition #%d was caught in "
+ "tape error recovery.\n", no);
+ PRINT_WARN("Please report this incident.\n");
+ if (request)
+ PRINT_WARN("Operation of tape:%s\n",
+ tape_op_verbose[request->op]);
+ tape_dump_sense(device, request, irb);
+ }
+ return tape_34xx_erp_failed(request, -EIO);
+}
+
+/*
+ * Handle data overrun between cu and drive. The channel speed might
+ * be too slow.
+ */
+static int
+tape_34xx_erp_overrun(struct tape_device *device, struct tape_request *request,
+ struct irb *irb)
+{
+ if (irb->ecw[3] == 0x40) {
+ PRINT_WARN ("Data overrun error between control-unit "
+ "and drive. Use a faster channel connection, "
+ "if possible! \n");
+ return tape_34xx_erp_failed(request, -EIO);
+ }
+ return tape_34xx_erp_bug(device, request, irb, -1);
+}
+
+/*
+ * Handle record sequence error.
+ */
+static int
+tape_34xx_erp_sequence(struct tape_device *device,
+ struct tape_request *request, struct irb *irb)
+{
+ if (irb->ecw[3] == 0x41) {
+ /*
+ * cu detected incorrect block-id sequence on tape.
+ */
+ PRINT_WARN("Illegal block-id sequence found!\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ }
+ /*
+ * Record sequence error bit is set, but erpa does not
+ * show record sequence error.
+ */
+ return tape_34xx_erp_bug(device, request, irb, -2);
+}
+
+/*
+ * This function analyses the tape's sense-data in case of a unit-check.
+ * If possible, it tries to recover from the error. Else the user is
+ * informed about the problem.
+ */
+static int
+tape_34xx_unit_check(struct tape_device *device, struct tape_request *request,
+ struct irb *irb)
+{
+ int inhibit_cu_recovery;
+ __u8* sense;
+
+ inhibit_cu_recovery = (*device->modeset_byte & 0x80) ? 1 : 0;
+ sense = irb->ecw;
+
+#ifdef CONFIG_S390_TAPE_BLOCK
+ if (request->op == TO_BLOCK) {
+ /*
+ * Recovery for block device requests. Set the block_position
+ * to something invalid and retry.
+ */
+ device->blk_data.block_position = -1;
+ if (request->retries-- <= 0)
+ return tape_34xx_erp_failed(request, -EIO);
+ else
+ return tape_34xx_erp_retry(request);
+ }
+#endif
+
+ if (
+ sense[0] & SENSE_COMMAND_REJECT &&
+ sense[1] & SENSE_WRITE_PROTECT
+ ) {
+ if (
+ request->op == TO_DSE ||
+ request->op == TO_WRI ||
+ request->op == TO_WTM
+ ) {
+ /* medium is write protected */
+ return tape_34xx_erp_failed(request, -EACCES);
+ } else {
+ return tape_34xx_erp_bug(device, request, irb, -3);
+ }
+ }
+
+ /*
+ * Special cases for various tape-states when reaching
+ * end of recorded area
+ *
+ * FIXME: Maybe a special case of the special case:
+ * sense[0] == SENSE_EQUIPMENT_CHECK &&
+ * sense[1] == SENSE_DRIVE_ONLINE &&
+ * sense[3] == 0x47 (Volume Fenced)
+ *
+ * This was caused by continued FSF or FSR after an
+ * 'End Of Data'.
+ */
+ if ((
+ sense[0] == SENSE_DATA_CHECK ||
+ sense[0] == SENSE_EQUIPMENT_CHECK ||
+ sense[0] == SENSE_EQUIPMENT_CHECK + SENSE_DEFERRED_UNIT_CHECK
+ ) && (
+ sense[1] == SENSE_DRIVE_ONLINE ||
+ sense[1] == SENSE_BEGINNING_OF_TAPE + SENSE_WRITE_MODE
+ )) {
+ switch (request->op) {
+ /*
+ * sense[0] == SENSE_DATA_CHECK &&
+ * sense[1] == SENSE_DRIVE_ONLINE
+ * sense[3] == 0x36 (End Of Data)
+ *
+ * Further seeks might return a 'Volume Fenced'.
+ */
+ case TO_FSF:
+ case TO_FSB:
+ /* Trying to seek beyond end of recorded area */
+ return tape_34xx_erp_failed(request, -ENOSPC);
+ case TO_BSB:
+ return tape_34xx_erp_retry(request);
+
+ /*
+ * sense[0] == SENSE_DATA_CHECK &&
+ * sense[1] == SENSE_DRIVE_ONLINE &&
+ * sense[3] == 0x36 (End Of Data)
+ */
+ case TO_LBL:
+ /* Block could not be located. */
+ tape_34xx_delete_sbid_from(device, 0);
+ return tape_34xx_erp_failed(request, -EIO);
+
+ case TO_RFO:
+ /* Read beyond end of recorded area -> 0 bytes read */
+ return tape_34xx_erp_failed(request, 0);
+
+ /*
+ * sense[0] == SENSE_EQUIPMENT_CHECK &&
+ * sense[1] == SENSE_DRIVE_ONLINE &&
+ * sense[3] == 0x38 (Physical End Of Volume)
+ */
+ case TO_WRI:
+ /* Writing at physical end of volume */
+ return tape_34xx_erp_failed(request, -ENOSPC);
+ default:
+ PRINT_ERR("Invalid op in %s:%i\n",
+ __FUNCTION__, __LINE__);
+ return tape_34xx_erp_failed(request, 0);
+ }
+ }
+
+ /* Sensing special bits */
+ if (sense[0] & SENSE_BUS_OUT_CHECK)
+ return tape_34xx_erp_retry(request);
+
+ if (sense[0] & SENSE_DATA_CHECK) {
+ /*
+ * hardware failure, damaged tape or improper
+ * operating conditions
+ */
+ switch (sense[3]) {
+ case 0x23:
+ /* a read data check occurred */
+ if ((sense[2] & SENSE_TAPE_SYNC_MODE) ||
+ inhibit_cu_recovery)
+ // data check is not permanent, may be
+ // recovered. We always use async-mode with
+ // cu-recovery, so this should *never* happen.
+ return tape_34xx_erp_bug(device, request,
+ irb, -4);
+
+ /* data check is permanent, CU recovery has failed */
+ PRINT_WARN("Permanent read error\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x25:
+ // a write data check occurred
+ if ((sense[2] & SENSE_TAPE_SYNC_MODE) ||
+ inhibit_cu_recovery)
+ // data check is not permanent, may be
+ // recovered. We always use async-mode with
+ // cu-recovery, so this should *never* happen.
+ return tape_34xx_erp_bug(device, request,
+ irb, -5);
+
+ // data check is permanent, cu-recovery has failed
+ PRINT_WARN("Permanent write error\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x26:
+ /* Data Check (read opposite) occurred. */
+ return tape_34xx_erp_read_opposite(device, request);
+ case 0x28:
+ /* ID-Mark at tape start couldn't be written */
+ PRINT_WARN("ID-Mark could not be written.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x31:
+ /* Tape void. Tried to read beyond end of device. */
+ PRINT_WARN("Read beyond end of recorded area.\n");
+ return tape_34xx_erp_failed(request, -ENOSPC);
+ case 0x41:
+ /* Record sequence error. */
+ PRINT_WARN("Invalid block-id sequence found.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ default:
+ /* all data checks for 3480 should result in one of
+ * the above erpa-codes. For 3490, other data-check
+ * conditions do exist. */
+ if (device->cdev->id.driver_info == tape_3480)
+ return tape_34xx_erp_bug(device, request,
+ irb, -6);
+ }
+ }
+
+ if (sense[0] & SENSE_OVERRUN)
+ return tape_34xx_erp_overrun(device, request, irb);
+
+ if (sense[1] & SENSE_RECORD_SEQUENCE_ERR)
+ return tape_34xx_erp_sequence(device, request, irb);
+
+ /* Sensing erpa codes */
+ switch (sense[3]) {
+ case 0x00:
+ /* Unit check with erpa code 0. Report and ignore. */
+ PRINT_WARN("Non-error sense was found. "
+ "Unit-check will be ignored.\n");
+ return TAPE_IO_SUCCESS;
+ case 0x21:
+ /*
+ * Data streaming not operational. CU will switch to
+ * interlock mode. Reissue the command.
+ */
+ PRINT_WARN("Data streaming not operational. "
+ "Switching to interlock-mode.\n");
+ return tape_34xx_erp_retry(request);
+ case 0x22:
+ /*
+ * Path equipment check. Might be drive adapter error, buffer
+ * error on the lower interface, internal path not usable,
+ * or error during cartridge load.
+ */
+ PRINT_WARN("A path equipment check occurred. One of the "
+ "following conditions occurred:\n");
+ PRINT_WARN("drive adapter error, buffer error on the lower "
+ "interface, internal path not usable, error "
+ "during cartridge load.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x24:
+ /*
+ * Load display check. Load display was command was issued,
+ * but the drive is displaying a drive check message. Can
+ * be threated as "device end".
+ */
+ return tape_34xx_erp_succeeded(request);
+ case 0x27:
+ /*
+ * Command reject. May indicate illegal channel program or
+ * buffer over/underrun. Since all channel programs are
+ * issued by this driver and ought be correct, we assume a
+ * over/underrun situation and retry the channel program.
+ */
+ return tape_34xx_erp_retry(request);
+ case 0x29:
+ /*
+ * Function incompatible. Either the tape is idrc compressed
+ * but the hardware isn't capable to do idrc, or a perform
+ * subsystem func is issued and the CU is not on-line.
+ */
+ PRINT_WARN ("Function incompatible. Try to switch off idrc\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x2a:
+ /*
+ * Unsolicited environmental data. An internal counter
+ * overflows, we can ignore this and reissue the cmd.
+ */
+ return tape_34xx_erp_retry(request);
+ case 0x2b:
+ /*
+ * Environmental data present. Indicates either unload
+ * completed ok or read buffered log command completed ok.
+ */
+ if (request->op == TO_RUN) {
+ /* Rewind unload completed ok. */
+ tape_med_state_set(device, MS_UNLOADED);
+ return tape_34xx_erp_succeeded(request);
+ }
+ /* tape_34xx doesn't use read buffered log commands. */
+ return tape_34xx_erp_bug(device, request, irb, sense[3]);
+ case 0x2c:
+ /*
+ * Permanent equipment check. CU has tried recovery, but
+ * did not succeed.
+ */
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x2d:
+ /* Data security erase failure. */
+ if (request->op == TO_DSE)
+ return tape_34xx_erp_failed(request, -EIO);
+ /* Data security erase failure, but no such command issued. */
+ return tape_34xx_erp_bug(device, request, irb, sense[3]);
+ case 0x2e:
+ /*
+ * Not capable. This indicates either that the drive fails
+ * reading the format id mark or that that format specified
+ * is not supported by the drive.
+ */
+ PRINT_WARN("Drive not capable processing the tape format!\n");
+ return tape_34xx_erp_failed(request, -EMEDIUMTYPE);
+ case 0x30:
+ /* The medium is write protected. */
+ PRINT_WARN("Medium is write protected!\n");
+ return tape_34xx_erp_failed(request, -EACCES);
+ case 0x32:
+ // Tension loss. We cannot recover this, it's an I/O error.
+ PRINT_WARN("The drive lost tape tension.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x33:
+ /*
+ * Load Failure. The cartridge was not inserted correctly or
+ * the tape is not threaded correctly.
+ */
+ PRINT_WARN("Cartridge load failure. Reload the cartridge "
+ "and try again.\n");
+ tape_34xx_delete_sbid_from(device, 0);
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x34:
+ /*
+ * Unload failure. The drive cannot maintain tape tension
+ * and control tape movement during an unload operation.
+ */
+ PRINT_WARN("Failure during cartridge unload. "
+ "Please try manually.\n");
+ if (request->op == TO_RUN)
+ return tape_34xx_erp_failed(request, -EIO);
+ return tape_34xx_erp_bug(device, request, irb, sense[3]);
+ case 0x35:
+ /*
+ * Drive equipment check. One of the following:
+ * - cu cannot recover from a drive detected error
+ * - a check code message is shown on drive display
+ * - the cartridge loader does not respond correctly
+ * - a failure occurs during an index, load, or unload cycle
+ */
+ PRINT_WARN("Equipment check! Please check the drive and "
+ "the cartridge loader.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x36:
+ if (device->cdev->id.driver_info == tape_3490)
+ /* End of data. */
+ return tape_34xx_erp_failed(request, -EIO);
+ /* This erpa is reserved for 3480 */
+ return tape_34xx_erp_bug(device, request, irb, sense[3]);
+ case 0x37:
+ /*
+ * Tape length error. The tape is shorter than reported in
+ * the beginning-of-tape data.
+ */
+ PRINT_WARN("Tape length error.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x38:
+ /*
+ * Physical end of tape. A read/write operation reached
+ * the physical end of tape.
+ */
+ if (request->op==TO_WRI ||
+ request->op==TO_DSE ||
+ request->op==TO_WTM)
+ return tape_34xx_erp_failed(request, -ENOSPC);
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x39:
+ /* Backward at Beginning of tape. */
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x3a:
+ /* Drive switched to not ready. */
+ PRINT_WARN("Drive not ready. Turn the ready/not ready switch "
+ "to ready position and try again.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x3b:
+ /* Manual rewind or unload. This causes an I/O error. */
+ PRINT_WARN("Medium was rewound or unloaded manually.\n");
+ tape_34xx_delete_sbid_from(device, 0);
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x42:
+ /*
+ * Degraded mode. A condition that can cause degraded
+ * performance is detected.
+ */
+ PRINT_WARN("Subsystem is running in degraded mode.\n");
+ return tape_34xx_erp_retry(request);
+ case 0x43:
+ /* Drive not ready. */
+ tape_34xx_delete_sbid_from(device, 0);
+ tape_med_state_set(device, MS_UNLOADED);
+ /* Some commands commands are successful even in this case */
+ if (sense[1] & SENSE_DRIVE_ONLINE) {
+ switch(request->op) {
+ case TO_ASSIGN:
+ case TO_UNASSIGN:
+ case TO_DIS:
+ case TO_NOP:
+ return tape_34xx_done(request);
+ break;
+ default:
+ break;
+ }
+ }
+ PRINT_WARN("The drive is not ready.\n");
+ return tape_34xx_erp_failed(request, -ENOMEDIUM);
+ case 0x44:
+ /* Locate Block unsuccessful. */
+ if (request->op != TO_BLOCK && request->op != TO_LBL)
+ /* No locate block was issued. */
+ return tape_34xx_erp_bug(device, request,
+ irb, sense[3]);
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x45:
+ /* The drive is assigned to a different channel path. */
+ PRINT_WARN("The drive is assigned elsewhere.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x46:
+ /*
+ * Drive not on-line. Drive may be switched offline,
+ * the power supply may be switched off or
+ * the drive address may not be set correctly.
+ */
+ PRINT_WARN("The drive is not on-line.");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x47:
+ /* Volume fenced. CU reports volume integrity is lost. */
+ PRINT_WARN("Volume fenced. The volume integrity is lost.\n");
+ tape_34xx_delete_sbid_from(device, 0);
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x48:
+ /* Log sense data and retry request. */
+ return tape_34xx_erp_retry(request);
+ case 0x49:
+ /* Bus out check. A parity check error on the bus was found. */
+ PRINT_WARN("Bus out check. A data transfer over the bus "
+ "has been corrupted.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x4a:
+ /* Control unit erp failed. */
+ PRINT_WARN("The control unit I/O error recovery failed.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x4b:
+ /*
+ * CU and drive incompatible. The drive requests micro-program
+ * patches, which are not available on the CU.
+ */
+ PRINT_WARN("The drive needs microprogram patches from the "
+ "control unit, which are not available.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x4c:
+ /*
+ * Recovered Check-One failure. Cu develops a hardware error,
+ * but is able to recover.
+ */
+ return tape_34xx_erp_retry(request);
+ case 0x4d:
+ if (device->cdev->id.driver_info == tape_3490)
+ /*
+ * Resetting event received. Since the driver does
+ * not support resetting event recovery (which has to
+ * be handled by the I/O Layer), retry our command.
+ */
+ return tape_34xx_erp_retry(request);
+ /* This erpa is reserved for 3480. */
+ return tape_34xx_erp_bug(device, request, irb, sense[3]);
+ case 0x4e:
+ if (device->cdev->id.driver_info == tape_3490) {
+ /*
+ * Maximum block size exceeded. This indicates, that
+ * the block to be written is larger than allowed for
+ * buffered mode.
+ */
+ PRINT_WARN("Maximum block size for buffered "
+ "mode exceeded.\n");
+ return tape_34xx_erp_failed(request, -ENOBUFS);
+ }
+ /* This erpa is reserved for 3480. */
+ return tape_34xx_erp_bug(device, request, irb, sense[3]);
+ case 0x50:
+ /*
+ * Read buffered log (Overflow). CU is running in extended
+ * buffered log mode, and a counter overflows. This should
+ * never happen, since we're never running in extended
+ * buffered log mode.
+ */
+ return tape_34xx_erp_retry(request);
+ case 0x51:
+ /*
+ * Read buffered log (EOV). EOF processing occurs while the
+ * CU is in extended buffered log mode. This should never
+ * happen, since we're never running in extended buffered
+ * log mode.
+ */
+ return tape_34xx_erp_retry(request);
+ case 0x52:
+ /* End of Volume complete. Rewind unload completed ok. */
+ if (request->op == TO_RUN) {
+ tape_med_state_set(device, MS_UNLOADED);
+ tape_34xx_delete_sbid_from(device, 0);
+ return tape_34xx_erp_succeeded(request);
+ }
+ return tape_34xx_erp_bug(device, request, irb, sense[3]);
+ case 0x53:
+ /* Global command intercept. */
+ return tape_34xx_erp_retry(request);
+ case 0x54:
+ /* Channel interface recovery (temporary). */
+ return tape_34xx_erp_retry(request);
+ case 0x55:
+ /* Channel interface recovery (permanent). */
+ PRINT_WARN("A permanent channel interface error occurred.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x56:
+ /* Channel protocol error. */
+ PRINT_WARN("A channel protocol error occurred.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x57:
+ if (device->cdev->id.driver_info == tape_3480) {
+ /* Attention intercept. */
+ PRINT_WARN("An attention intercept occurred, "
+ "which will be recovered.\n");
+ return tape_34xx_erp_retry(request);
+ } else {
+ /* Global status intercept. */
+ PRINT_WARN("An global status intercept was received, "
+ "which will be recovered.\n");
+ return tape_34xx_erp_retry(request);
+ }
+ case 0x5a:
+ /*
+ * Tape length incompatible. The tape inserted is too long,
+ * which could cause damage to the tape or the drive.
+ */
+ PRINT_WARN("Tape Length Incompatible\n");
+ PRINT_WARN("Tape length exceeds IBM enhanced capacity "
+ "cartdridge length or a medium\n");
+ PRINT_WARN("with EC-CST identification mark has been mounted "
+ "in a device that writes\n");
+ PRINT_WARN("3480 or 3480 XF format.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x5b:
+ /* Format 3480 XF incompatible */
+ if (sense[1] & SENSE_BEGINNING_OF_TAPE)
+ /* The tape will get overwritten. */
+ return tape_34xx_erp_retry(request);
+ PRINT_WARN("Format 3480 XF Incompatible\n");
+ PRINT_WARN("Medium has been created in 3480 format. "
+ "To change the format writes\n");
+ PRINT_WARN("must be issued at BOT.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x5c:
+ /* Format 3480-2 XF incompatible */
+ PRINT_WARN("Format 3480-2 XF Incompatible\n");
+ PRINT_WARN("Device can only read 3480 or 3480 XF format.\n");
+ return tape_34xx_erp_failed(request, -EIO);
+ case 0x5d:
+ /* Tape length violation. */
+ PRINT_WARN("Tape Length Violation\n");
+ PRINT_WARN("The mounted tape exceeds IBM Enhanced Capacity "
+ "Cartdridge System Tape length.\n");
+ PRINT_WARN("This may cause damage to the drive or tape when "
+ "processing to the EOV\n");
+ return tape_34xx_erp_failed(request, -EMEDIUMTYPE);
+ case 0x5e:
+ /* Compaction algorithm incompatible. */
+ PRINT_WARN("Compaction Algorithm Incompatible\n");
+ PRINT_WARN("The volume is recorded using an incompatible "
+ "compaction algorithm,\n");
+ PRINT_WARN("which is not supported by the device.\n");
+ return tape_34xx_erp_failed(request, -EMEDIUMTYPE);
+
+ /* The following erpas should have been covered earlier. */
+ case 0x23: /* Read data check. */
+ case 0x25: /* Write data check. */
+ case 0x26: /* Data check (read opposite). */
+ case 0x28: /* Write id mark check. */
+ case 0x31: /* Tape void. */
+ case 0x40: /* Overrun error. */
+ case 0x41: /* Record sequence error. */
+ /* All other erpas are reserved for future use. */
+ default:
+ return tape_34xx_erp_bug(device, request, irb, sense[3]);
+ }
+}
+
+/*
+ * 3480/3490 interrupt handler
+ */
+static int
+tape_34xx_irq(struct tape_device *device, struct tape_request *request,
+ struct irb *irb)
+{
+ if (request == NULL)
+ return tape_34xx_unsolicited_irq(device, irb);
+
+ if ((irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) &&
+ (irb->scsw.dstat & DEV_STAT_DEV_END) &&
+ (request->op == TO_WRI)) {
+ /* Write at end of volume */
+ PRINT_INFO("End of volume\n"); /* XXX */
+ return tape_34xx_erp_failed(request, -ENOSPC);
+ }
+
+ if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK)
+ return tape_34xx_unit_check(device, request, irb);
+
+ if (irb->scsw.dstat & DEV_STAT_DEV_END) {
+ /*
+ * A unit exception occurs on skipping over a tapemark block.
+ */
+ if (irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) {
+ if (request->op == TO_BSB || request->op == TO_FSB)
+ request->rescnt++;
+ else
+ DBF_EVENT(5, "Unit Exception!\n");
+ }
+ return tape_34xx_done(request);
+ }
+
+ DBF_EVENT(6, "xunknownirq\n");
+ PRINT_ERR("Unexpected interrupt.\n");
+ PRINT_ERR("Current op is: %s", tape_op_verbose[request->op]);
+ tape_dump_sense(device, request, irb);
+ return TAPE_IO_STOP;
+}
+
+/*
+ * ioctl_overload
+ */
+static int
+tape_34xx_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg)
+{
+ if (cmd == TAPE390_DISPLAY) {
+ struct display_struct disp;
+
+ if (copy_from_user(&disp, (char __user *) arg, sizeof(disp)) != 0)
+ return -EFAULT;
+
+ return tape_std_display(device, &disp);
+ } else
+ return -EINVAL;
+}
+
+static inline void
+tape_34xx_append_new_sbid(struct tape_34xx_block_id bid, struct list_head *l)
+{
+ struct tape_34xx_sbid * new_sbid;
+
+ new_sbid = kmalloc(sizeof(*new_sbid), GFP_ATOMIC);
+ if (!new_sbid)
+ return;
+
+ new_sbid->bid = bid;
+ list_add(&new_sbid->list, l);
+}
+
+/*
+ * Build up the search block ID list. The block ID consists of a logical
+ * block number and a hardware specific part. The hardware specific part
+ * helps the tape drive to speed up searching for a specific block.
+ */
+static void
+tape_34xx_add_sbid(struct tape_device *device, struct tape_34xx_block_id bid)
+{
+ struct list_head * sbid_list;
+ struct tape_34xx_sbid * sbid;
+ struct list_head * l;
+
+ /*
+ * immediately return if there is no list at all or the block to add
+ * is located in segment 1 of wrap 0 because this position is used
+ * if no hardware position data is supplied.
+ */
+ sbid_list = (struct list_head *) device->discdata;
+ if (!sbid_list || (bid.segment < 2 && bid.wrap == 0))
+ return;
+
+ /*
+ * Search the position where to insert the new entry. Hardware
+ * acceleration uses only the segment and wrap number. So we
+ * need only one entry for a specific wrap/segment combination.
+ * If there is a block with a lower number but the same hard-
+ * ware position data we just update the block number in the
+ * existing entry.
+ */
+ list_for_each(l, sbid_list) {
+ sbid = list_entry(l, struct tape_34xx_sbid, list);
+
+ if (
+ (sbid->bid.segment == bid.segment) &&
+ (sbid->bid.wrap == bid.wrap)
+ ) {
+ if (bid.block < sbid->bid.block)
+ sbid->bid = bid;
+ else return;
+ break;
+ }
+
+ /* Sort in according to logical block number. */
+ if (bid.block < sbid->bid.block) {
+ tape_34xx_append_new_sbid(bid, l->prev);
+ break;
+ }
+ }
+ /* List empty or new block bigger than last entry. */
+ if (l == sbid_list)
+ tape_34xx_append_new_sbid(bid, l->prev);
+
+ DBF_LH(4, "Current list is:\n");
+ list_for_each(l, sbid_list) {
+ sbid = list_entry(l, struct tape_34xx_sbid, list);
+ DBF_LH(4, "%d:%03d@%05d\n",
+ sbid->bid.wrap,
+ sbid->bid.segment,
+ sbid->bid.block
+ );
+ }
+}
+
+/*
+ * Delete all entries from the search block ID list that belong to tape blocks
+ * equal or higher than the given number.
+ */
+static void
+tape_34xx_delete_sbid_from(struct tape_device *device, int from)
+{
+ struct list_head * sbid_list;
+ struct tape_34xx_sbid * sbid;
+ struct list_head * l;
+ struct list_head * n;
+
+ sbid_list = (struct list_head *) device->discdata;
+ if (!sbid_list)
+ return;
+
+ list_for_each_safe(l, n, sbid_list) {
+ sbid = list_entry(l, struct tape_34xx_sbid, list);
+ if (sbid->bid.block >= from) {
+ DBF_LH(4, "Delete sbid %d:%03d@%05d\n",
+ sbid->bid.wrap,
+ sbid->bid.segment,
+ sbid->bid.block
+ );
+ list_del(l);
+ kfree(sbid);
+ }
+ }
+}
+
+/*
+ * Merge hardware position data into a block id.
+ */
+static void
+tape_34xx_merge_sbid(
+ struct tape_device * device,
+ struct tape_34xx_block_id * bid
+) {
+ struct tape_34xx_sbid * sbid;
+ struct tape_34xx_sbid * sbid_to_use;
+ struct list_head * sbid_list;
+ struct list_head * l;
+
+ sbid_list = (struct list_head *) device->discdata;
+ bid->wrap = 0;
+ bid->segment = 1;
+
+ if (!sbid_list || list_empty(sbid_list))
+ return;
+
+ sbid_to_use = NULL;
+ list_for_each(l, sbid_list) {
+ sbid = list_entry(l, struct tape_34xx_sbid, list);
+
+ if (sbid->bid.block >= bid->block)
+ break;
+ sbid_to_use = sbid;
+ }
+ if (sbid_to_use) {
+ bid->wrap = sbid_to_use->bid.wrap;
+ bid->segment = sbid_to_use->bid.segment;
+ DBF_LH(4, "Use %d:%03d@%05d for %05d\n",
+ sbid_to_use->bid.wrap,
+ sbid_to_use->bid.segment,
+ sbid_to_use->bid.block,
+ bid->block
+ );
+ }
+}
+
+static int
+tape_34xx_setup_device(struct tape_device * device)
+{
+ int rc;
+ struct list_head * discdata;
+
+ DBF_EVENT(6, "34xx device setup\n");
+ if ((rc = tape_std_assign(device)) == 0) {
+ if ((rc = tape_34xx_medium_sense(device)) != 0) {
+ DBF_LH(3, "34xx medium sense returned %d\n", rc);
+ }
+ }
+ discdata = kmalloc(sizeof(struct list_head), GFP_KERNEL);
+ if (discdata) {
+ INIT_LIST_HEAD(discdata);
+ device->discdata = discdata;
+ }
+
+ return rc;
+}
+
+static void
+tape_34xx_cleanup_device(struct tape_device *device)
+{
+ tape_std_unassign(device);
+
+ if (device->discdata) {
+ tape_34xx_delete_sbid_from(device, 0);
+ kfree(device->discdata);
+ device->discdata = NULL;
+ }
+}
+
+
+/*
+ * MTTELL: Tell block. Return the number of block relative to current file.
+ */
+static int
+tape_34xx_mttell(struct tape_device *device, int mt_count)
+{
+ struct {
+ struct tape_34xx_block_id cbid;
+ struct tape_34xx_block_id dbid;
+ } __attribute__ ((packed)) block_id;
+ int rc;
+
+ rc = tape_std_read_block_id(device, (__u64 *) &block_id);
+ if (rc)
+ return rc;
+
+ tape_34xx_add_sbid(device, block_id.cbid);
+ return block_id.cbid.block;
+}
+
+/*
+ * MTSEEK: seek to the specified block.
+ */
+static int
+tape_34xx_mtseek(struct tape_device *device, int mt_count)
+{
+ struct tape_request *request;
+ struct tape_34xx_block_id * bid;
+
+ if (mt_count > 0x3fffff) {
+ DBF_EXCEPTION(6, "xsee parm\n");
+ return -EINVAL;
+ }
+ request = tape_alloc_request(3, 4);
+ if (IS_ERR(request))
+ return PTR_ERR(request);
+
+ /* setup ccws */
+ request->op = TO_LBL;
+ bid = (struct tape_34xx_block_id *) request->cpdata;
+ bid->format = (*device->modeset_byte & 0x08) ?
+ TAPE34XX_FMT_3480_XF : TAPE34XX_FMT_3480;
+ bid->block = mt_count;
+ tape_34xx_merge_sbid(device, bid);
+
+ tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
+ tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
+ tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
+
+ /* execute it */
+ return tape_do_io_free(device, request);
+}
+
+#ifdef CONFIG_S390_TAPE_BLOCK
+/*
+ * Tape block read for 34xx.
+ */
+static struct tape_request *
+tape_34xx_bread(struct tape_device *device, struct request *req)
+{
+ struct tape_request *request;
+ struct ccw1 *ccw;
+ int count = 0, i;
+ unsigned off;
+ char *dst;
+ struct bio_vec *bv;
+ struct bio *bio;
+ struct tape_34xx_block_id * start_block;
+
+ DBF_EVENT(6, "xBREDid:");
+
+ /* Count the number of blocks for the request. */
+ rq_for_each_bio(bio, req) {
+ bio_for_each_segment(bv, bio, i) {
+ count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9);
+ }
+ }
+
+ /* Allocate the ccw request. */
+ request = tape_alloc_request(3+count+1, 8);
+ if (IS_ERR(request))
+ return request;
+
+ /* Setup ccws. */
+ request->op = TO_BLOCK;
+ start_block = (struct tape_34xx_block_id *) request->cpdata;
+ start_block->block = req->sector >> TAPEBLOCK_HSEC_S2B;
+ DBF_EVENT(6, "start_block = %i\n", start_block->block);
+
+ ccw = request->cpaddr;
+ ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte);
+
+ /*
+ * We always setup a nop after the mode set ccw. This slot is
+ * used in tape_std_check_locate to insert a locate ccw if the
+ * current tape position doesn't match the start block to be read.
+ * The second nop will be filled with a read block id which is in
+ * turn used by tape_34xx_free_bread to populate the segment bid
+ * table.
+ */
+ ccw = tape_ccw_cc(ccw, NOP, 0, NULL);
+ ccw = tape_ccw_cc(ccw, NOP, 0, NULL);
+
+ rq_for_each_bio(bio, req) {
+ bio_for_each_segment(bv, bio, i) {
+ dst = kmap(bv->bv_page) + bv->bv_offset;
+ for (off = 0; off < bv->bv_len;
+ off += TAPEBLOCK_HSEC_SIZE) {
+ ccw->flags = CCW_FLAG_CC;
+ ccw->cmd_code = READ_FORWARD;
+ ccw->count = TAPEBLOCK_HSEC_SIZE;
+ set_normalized_cda(ccw, (void*) __pa(dst));
+ ccw++;
+ dst += TAPEBLOCK_HSEC_SIZE;
+ }
+ }
+ }
+
+ ccw = tape_ccw_end(ccw, NOP, 0, NULL);
+ DBF_EVENT(6, "xBREDccwg\n");
+ return request;
+}
+
+static void
+tape_34xx_free_bread (struct tape_request *request)
+{
+ struct ccw1* ccw;
+
+ ccw = request->cpaddr;
+ if ((ccw + 2)->cmd_code == READ_BLOCK_ID) {
+ struct {
+ struct tape_34xx_block_id cbid;
+ struct tape_34xx_block_id dbid;
+ } __attribute__ ((packed)) *rbi_data;
+
+ rbi_data = request->cpdata;
+
+ if (request->device)
+ tape_34xx_add_sbid(request->device, rbi_data->cbid);
+ }
+
+ /* Last ccw is a nop and doesn't need clear_normalized_cda */
+ for (; ccw->flags & CCW_FLAG_CC; ccw++)
+ if (ccw->cmd_code == READ_FORWARD)
+ clear_normalized_cda(ccw);
+ tape_free_request(request);
+}
+
+/*
+ * check_locate is called just before the tape request is passed to
+ * the common io layer for execution. It has to check the current
+ * tape position and insert a locate ccw if it doesn't match the
+ * start block for the request.
+ */
+static void
+tape_34xx_check_locate(struct tape_device *device, struct tape_request *request)
+{
+ struct tape_34xx_block_id * start_block;
+
+ start_block = (struct tape_34xx_block_id *) request->cpdata;
+ if (start_block->block == device->blk_data.block_position)
+ return;
+
+ DBF_LH(4, "Block seek(%06d+%06d)\n", start_block->block, device->bof);
+ start_block->wrap = 0;
+ start_block->segment = 1;
+ start_block->format = (*device->modeset_byte & 0x08) ?
+ TAPE34XX_FMT_3480_XF :
+ TAPE34XX_FMT_3480;
+ start_block->block = start_block->block + device->bof;
+ tape_34xx_merge_sbid(device, start_block);
+ tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
+ tape_ccw_cc(request->cpaddr + 2, READ_BLOCK_ID, 8, request->cpdata);
+}
+#endif
+
+/*
+ * List of 3480/3490 magnetic tape commands.
+ */
+static tape_mtop_fn tape_34xx_mtop[TAPE_NR_MTOPS] = {
+ [MTRESET] = tape_std_mtreset,
+ [MTFSF] = tape_std_mtfsf,
+ [MTBSF] = tape_std_mtbsf,
+ [MTFSR] = tape_std_mtfsr,
+ [MTBSR] = tape_std_mtbsr,
+ [MTWEOF] = tape_std_mtweof,
+ [MTREW] = tape_std_mtrew,
+ [MTOFFL] = tape_std_mtoffl,
+ [MTNOP] = tape_std_mtnop,
+ [MTRETEN] = tape_std_mtreten,
+ [MTBSFM] = tape_std_mtbsfm,
+ [MTFSFM] = tape_std_mtfsfm,
+ [MTEOM] = tape_std_mteom,
+ [MTERASE] = tape_std_mterase,
+ [MTRAS1] = NULL,
+ [MTRAS2] = NULL,
+ [MTRAS3] = NULL,
+ [MTSETBLK] = tape_std_mtsetblk,
+ [MTSETDENSITY] = NULL,
+ [MTSEEK] = tape_34xx_mtseek,
+ [MTTELL] = tape_34xx_mttell,
+ [MTSETDRVBUFFER] = NULL,
+ [MTFSS] = NULL,
+ [MTBSS] = NULL,
+ [MTWSM] = NULL,
+ [MTLOCK] = NULL,
+ [MTUNLOCK] = NULL,
+ [MTLOAD] = tape_std_mtload,
+ [MTUNLOAD] = tape_std_mtunload,
+ [MTCOMPRESSION] = tape_std_mtcompression,
+ [MTSETPART] = NULL,
+ [MTMKPART] = NULL
+};
+
+/*
+ * Tape discipline structure for 3480 and 3490.
+ */
+static struct tape_discipline tape_discipline_34xx = {
+ .owner = THIS_MODULE,
+ .setup_device = tape_34xx_setup_device,
+ .cleanup_device = tape_34xx_cleanup_device,
+ .process_eov = tape_std_process_eov,
+ .irq = tape_34xx_irq,
+ .read_block = tape_std_read_block,
+ .write_block = tape_std_write_block,
+#ifdef CONFIG_S390_TAPE_BLOCK
+ .bread = tape_34xx_bread,
+ .free_bread = tape_34xx_free_bread,
+ .check_locate = tape_34xx_check_locate,
+#endif
+ .ioctl_fn = tape_34xx_ioctl,
+ .mtop_array = tape_34xx_mtop
+};
+
+static struct ccw_device_id tape_34xx_ids[] = {
+ { CCW_DEVICE_DEVTYPE(0x3480, 0, 0x3480, 0), driver_info: tape_3480},
+ { CCW_DEVICE_DEVTYPE(0x3490, 0, 0x3490, 0), driver_info: tape_3490},
+ { /* end of list */ }
+};
+
+static int
+tape_34xx_online(struct ccw_device *cdev)
+{
+ return tape_generic_online(
+ cdev->dev.driver_data,
+ &tape_discipline_34xx
+ );
+}
+
+static int
+tape_34xx_offline(struct ccw_device *cdev)
+{
+ return tape_generic_offline(cdev->dev.driver_data);
+}
+
+static struct ccw_driver tape_34xx_driver = {
+ .name = "tape_34xx",
+ .owner = THIS_MODULE,
+ .ids = tape_34xx_ids,
+ .probe = tape_generic_probe,
+ .remove = tape_generic_remove,
+ .set_online = tape_34xx_online,
+ .set_offline = tape_34xx_offline,
+};
+
+static int
+tape_34xx_init (void)
+{
+ int rc;
+
+ TAPE_DBF_AREA = debug_register ( "tape_34xx", 1, 2, 4*sizeof(long));
+ debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view);
+#ifdef DBF_LIKE_HELL
+ debug_set_level(TAPE_DBF_AREA, 6);
+#endif
+
+ DBF_EVENT(3, "34xx init: $Revision: 1.21 $\n");
+ /* Register driver for 3480/3490 tapes. */
+ rc = ccw_driver_register(&tape_34xx_driver);
+ if (rc)
+ DBF_EVENT(3, "34xx init failed\n");
+ else
+ DBF_EVENT(3, "34xx registered\n");
+ return rc;
+}
+
+static void
+tape_34xx_exit(void)
+{
+ ccw_driver_unregister(&tape_34xx_driver);
+
+ debug_unregister(TAPE_DBF_AREA);
+}
+
+MODULE_DEVICE_TABLE(ccw, tape_34xx_ids);
+MODULE_AUTHOR("(C) 2001-2002 IBM Deutschland Entwicklung GmbH");
+MODULE_DESCRIPTION("Linux on zSeries channel attached 3480 tape "
+ "device driver ($Revision: 1.21 $)");
+MODULE_LICENSE("GPL");
+
+module_init(tape_34xx_init);
+module_exit(tape_34xx_exit);