Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 765 insertions, 0 deletions

diff --git a/drivers/s390/char/tape_std.c b/drivers/s390/char/tape_std.c
new file mode 100644
index 000000000000..2f9fe30989a7
--- /dev/null
+++ b/drivers/s390/char/tape_std.c
@@ -0,0 +1,765 @@
+/*
+ *  drivers/s390/char/tape_std.c
+ *    standard tape device functions for ibm tapes.
+ *
+ *  S390 and zSeries version
+ *    Copyright (C) 2001,2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Carsten Otte <cotte@de.ibm.com>
+ *               Michael Holzheu <holzheu@de.ibm.com>
+ *               Tuan Ngo-Anh <ngoanh@de.ibm.com>
+ *               Martin Schwidefsky <schwidefsky@de.ibm.com>
+ *               Stefan Bader <shbader@de.ibm.com>
+ */
+
+#include <linux/config.h>
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/bio.h>
+#include <linux/timer.h>
+
+#include <asm/types.h>
+#include <asm/idals.h>
+#include <asm/ebcdic.h>
+#include <asm/tape390.h>
+
+#define TAPE_DBF_AREA   tape_core_dbf
+
+#include "tape.h"
+#include "tape_std.h"
+
+#define PRINTK_HEADER "TAPE_STD: "
+
+/*
+ * tape_std_assign
+ */
+static void
+tape_std_assign_timeout(unsigned long data)
+{
+        struct tape_request *   request;
+        struct tape_device *    device;
+
+        request = (struct tape_request *) data;
+        if ((device = request->device) == NULL)
+                BUG();
+
+        spin_lock_irq(get_ccwdev_lock(device->cdev));
+        if (request->callback != NULL) {
+                DBF_EVENT(3, "%08x: Assignment timeout. Device busy.\n",
+                        device->cdev_id);
+                PRINT_ERR("%s: Assignment timeout. Device busy.\n",
+                        device->cdev->dev.bus_id);
+                ccw_device_clear(device->cdev, (long) request);
+        }
+        spin_unlock_irq(get_ccwdev_lock(device->cdev));
+}
+
+int
+tape_std_assign(struct tape_device *device)
+{
+        int                  rc;
+        struct timer_list    timeout;
+        struct tape_request *request;
+
+        request = tape_alloc_request(2, 11);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+
+        request->op = TO_ASSIGN;
+        tape_ccw_cc(request->cpaddr, ASSIGN, 11, request->cpdata);
+        tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL);
+
+        /*
+         * The assign command sometimes blocks if the device is assigned
+         * to another host (actually this shouldn't happen but it does).
+         * So we set up a timeout for this call.
+         */
+        init_timer(&timeout);
+        timeout.function = tape_std_assign_timeout;
+        timeout.data     = (unsigned long) request;
+        timeout.expires  = jiffies + 2 * HZ;
+        add_timer(&timeout);
+
+        rc = tape_do_io_interruptible(device, request);
+
+        del_timer(&timeout);
+
+        if (rc != 0) {
+                PRINT_WARN("%s: assign failed - device might be busy\n",
+                        device->cdev->dev.bus_id);
+                DBF_EVENT(3, "%08x: assign failed - device might be busy\n",
+                        device->cdev_id);
+        } else {
+                DBF_EVENT(3, "%08x: Tape assigned\n", device->cdev_id);
+        }
+        tape_free_request(request);
+        return rc;
+}
+
+/*
+ * tape_std_unassign
+ */
+int
+tape_std_unassign (struct tape_device *device)
+{
+        int                  rc;
+        struct tape_request *request;
+
+        if (device->tape_state == TS_NOT_OPER) {
+                DBF_EVENT(3, "(%08x): Can't unassign device\n",
+                        device->cdev_id);
+                PRINT_WARN("(%s): Can't unassign device - device gone\n",
+                        device->cdev->dev.bus_id);
+                return -EIO;
+        }
+
+        request = tape_alloc_request(2, 11);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+
+        request->op = TO_UNASSIGN;
+        tape_ccw_cc(request->cpaddr, UNASSIGN, 11, request->cpdata);
+        tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL);
+
+        if ((rc = tape_do_io(device, request)) != 0) {
+                DBF_EVENT(3, "%08x: Unassign failed\n", device->cdev_id);
+                PRINT_WARN("%s: Unassign failed\n", device->cdev->dev.bus_id);
+        } else {
+                DBF_EVENT(3, "%08x: Tape unassigned\n", device->cdev_id);
+        }
+        tape_free_request(request);
+        return rc;
+}
+
+/*
+ * TAPE390_DISPLAY: Show a string on the tape display.
+ */
+int
+tape_std_display(struct tape_device *device, struct display_struct *disp)
+{
+        struct tape_request *request;
+        int rc;
+
+        request = tape_alloc_request(2, 17);
+        if (IS_ERR(request)) {
+                DBF_EVENT(3, "TAPE: load display failed\n");
+                return PTR_ERR(request);
+        }
+        request->op = TO_DIS;
+
+        *(unsigned char *) request->cpdata = disp->cntrl;
+        DBF_EVENT(5, "TAPE: display cntrl=%04x\n", disp->cntrl);
+        memcpy(((unsigned char *) request->cpdata) + 1, disp->message1, 8);
+        memcpy(((unsigned char *) request->cpdata) + 9, disp->message2, 8);
+        ASCEBC(((unsigned char*) request->cpdata) + 1, 16);
+
+        tape_ccw_cc(request->cpaddr, LOAD_DISPLAY, 17, request->cpdata);
+        tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL);
+
+        rc = tape_do_io_interruptible(device, request);
+        tape_free_request(request);
+        return rc;
+}
+
+/*
+ * Read block id.
+ */
+int
+tape_std_read_block_id(struct tape_device *device, __u64 *id)
+{
+        struct tape_request *request;
+        int rc;
+
+        request = tape_alloc_request(3, 8);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+        request->op = TO_RBI;
+        /* setup ccws */
+        tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
+        tape_ccw_cc(request->cpaddr + 1, READ_BLOCK_ID, 8, request->cpdata);
+        tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
+        /* execute it */
+        rc = tape_do_io(device, request);
+        if (rc == 0)
+                /* Get result from read buffer. */
+                *id = *(__u64 *) request->cpdata;
+        tape_free_request(request);
+        return rc;
+}
+
+int
+tape_std_terminate_write(struct tape_device *device)
+{
+        int rc;
+
+        if(device->required_tapemarks == 0)
+                return 0;
+
+        DBF_LH(5, "tape%d: terminate write %dxEOF\n", device->first_minor,
+                device->required_tapemarks);
+
+        rc = tape_mtop(device, MTWEOF, device->required_tapemarks);
+        if (rc)
+                return rc;
+
+        device->required_tapemarks = 0;
+        return tape_mtop(device, MTBSR, 1);
+}
+
+/*
+ * MTLOAD: Loads the tape.
+ * The default implementation just wait until the tape medium state changes
+ * to MS_LOADED.
+ */
+int
+tape_std_mtload(struct tape_device *device, int count)
+{
+        return wait_event_interruptible(device->state_change_wq,
+                (device->medium_state == MS_LOADED));
+}
+
+/*
+ * MTSETBLK: Set block size.
+ */
+int
+tape_std_mtsetblk(struct tape_device *device, int count)
+{
+        struct idal_buffer *new;
+
+        DBF_LH(6, "tape_std_mtsetblk(%d)\n", count);
+        if (count <= 0) {
+                /*
+                 * Just set block_size to 0. tapechar_read/tapechar_write
+                 * will realloc the idal buffer if a bigger one than the
+                 * current is needed.
+                 */
+                device->char_data.block_size = 0;
+                return 0;
+        }
+        if (device->char_data.idal_buf != NULL &&
+            device->char_data.idal_buf->size == count)
+                /* We already have a idal buffer of that size. */
+                return 0;
+
+        if (count > MAX_BLOCKSIZE) {
+                DBF_EVENT(3, "Invalid block size (%d > %d) given.\n",
+                        count, MAX_BLOCKSIZE);
+                PRINT_ERR("Invalid block size (%d > %d) given.\n",
+                        count, MAX_BLOCKSIZE);
+                return -EINVAL;
+        }
+
+        /* Allocate a new idal buffer. */
+        new = idal_buffer_alloc(count, 0);
+        if (new == NULL)
+                return -ENOMEM;
+        if (device->char_data.idal_buf != NULL)
+                idal_buffer_free(device->char_data.idal_buf);
+        device->char_data.idal_buf = new;
+        device->char_data.block_size = count;
+
+        DBF_LH(6, "new blocksize is %d\n", device->char_data.block_size);
+
+        return 0;
+}
+
+/*
+ * MTRESET: Set block size to 0.
+ */
+int
+tape_std_mtreset(struct tape_device *device, int count)
+{
+        DBF_EVENT(6, "TCHAR:devreset:\n");
+        device->char_data.block_size = 0;
+        return 0;
+}
+
+/*
+ * MTFSF: Forward space over 'count' file marks. The tape is positioned
+ * at the EOT (End of Tape) side of the file mark.
+ */
+int
+tape_std_mtfsf(struct tape_device *device, int mt_count)
+{
+        struct tape_request *request;
+        struct ccw1 *ccw;
+
+        request = tape_alloc_request(mt_count + 2, 0);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+        request->op = TO_FSF;
+        /* setup ccws */
+        ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
+                          device->modeset_byte);
+        ccw = tape_ccw_repeat(ccw, FORSPACEFILE, mt_count);
+        ccw = tape_ccw_end(ccw, NOP, 0, NULL);
+
+        /* execute it */
+        return tape_do_io_free(device, request);
+}
+
+/*
+ * MTFSR: Forward space over 'count' tape blocks (blocksize is set
+ * via MTSETBLK.
+ */
+int
+tape_std_mtfsr(struct tape_device *device, int mt_count)
+{
+        struct tape_request *request;
+        struct ccw1 *ccw;
+        int rc;
+
+        request = tape_alloc_request(mt_count + 2, 0);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+        request->op = TO_FSB;
+        /* setup ccws */
+        ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
+                          device->modeset_byte);
+        ccw = tape_ccw_repeat(ccw, FORSPACEBLOCK, mt_count);
+        ccw = tape_ccw_end(ccw, NOP, 0, NULL);
+
+        /* execute it */
+        rc = tape_do_io(device, request);
+        if (rc == 0 && request->rescnt > 0) {
+                DBF_LH(3, "FSR over tapemark\n");
+                rc = 1;
+        }
+        tape_free_request(request);
+
+        return rc;
+}
+
+/*
+ * MTBSR: Backward space over 'count' tape blocks.
+ * (blocksize is set via MTSETBLK.
+ */
+int
+tape_std_mtbsr(struct tape_device *device, int mt_count)
+{
+        struct tape_request *request;
+        struct ccw1 *ccw;
+        int rc;
+
+        request = tape_alloc_request(mt_count + 2, 0);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+        request->op = TO_BSB;
+        /* setup ccws */
+        ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
+                          device->modeset_byte);
+        ccw = tape_ccw_repeat(ccw, BACKSPACEBLOCK, mt_count);
+        ccw = tape_ccw_end(ccw, NOP, 0, NULL);
+
+        /* execute it */
+        rc = tape_do_io(device, request);
+        if (rc == 0 && request->rescnt > 0) {
+                DBF_LH(3, "BSR over tapemark\n");
+                rc = 1;
+        }
+        tape_free_request(request);
+
+        return rc;
+}
+
+/*
+ * MTWEOF: Write 'count' file marks at the current position.
+ */
+int
+tape_std_mtweof(struct tape_device *device, int mt_count)
+{
+        struct tape_request *request;
+        struct ccw1 *ccw;
+
+        request = tape_alloc_request(mt_count + 2, 0);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+        request->op = TO_WTM;
+        /* setup ccws */
+        ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
+                          device->modeset_byte);
+        ccw = tape_ccw_repeat(ccw, WRITETAPEMARK, mt_count);
+        ccw = tape_ccw_end(ccw, NOP, 0, NULL);
+
+        /* execute it */
+        return tape_do_io_free(device, request);
+}
+
+/*
+ * MTBSFM: Backward space over 'count' file marks.
+ * The tape is positioned at the BOT (Begin Of Tape) side of the
+ * last skipped file mark.
+ */
+int
+tape_std_mtbsfm(struct tape_device *device, int mt_count)
+{
+        struct tape_request *request;
+        struct ccw1 *ccw;
+
+        request = tape_alloc_request(mt_count + 2, 0);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+        request->op = TO_BSF;
+        /* setup ccws */
+        ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
+                          device->modeset_byte);
+        ccw = tape_ccw_repeat(ccw, BACKSPACEFILE, mt_count);
+        ccw = tape_ccw_end(ccw, NOP, 0, NULL);
+
+        /* execute it */
+        return tape_do_io_free(device, request);
+}
+
+/*
+ * MTBSF: Backward space over 'count' file marks. The tape is positioned at
+ * the EOT (End of Tape) side of the last skipped file mark.
+ */
+int
+tape_std_mtbsf(struct tape_device *device, int mt_count)
+{
+        struct tape_request *request;
+        struct ccw1 *ccw;
+        int rc;
+
+        request = tape_alloc_request(mt_count + 2, 0);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+        request->op = TO_BSF;
+        /* setup ccws */
+        ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
+                          device->modeset_byte);
+        ccw = tape_ccw_repeat(ccw, BACKSPACEFILE, mt_count);
+        ccw = tape_ccw_end(ccw, NOP, 0, NULL);
+        /* execute it */
+        rc = tape_do_io_free(device, request);
+        if (rc == 0) {
+                rc = tape_mtop(device, MTFSR, 1);
+                if (rc > 0)
+                        rc = 0;
+        }
+        return rc;
+}
+
+/*
+ * MTFSFM: Forward space over 'count' file marks.
+ * The tape is positioned at the BOT (Begin Of Tape) side
+ * of the last skipped file mark.
+ */
+int
+tape_std_mtfsfm(struct tape_device *device, int mt_count)
+{
+        struct tape_request *request;
+        struct ccw1 *ccw;
+        int rc;
+
+        request = tape_alloc_request(mt_count + 2, 0);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+        request->op = TO_FSF;
+        /* setup ccws */
+        ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
+                          device->modeset_byte);
+        ccw = tape_ccw_repeat(ccw, FORSPACEFILE, mt_count);
+        ccw = tape_ccw_end(ccw, NOP, 0, NULL);
+        /* execute it */
+        rc = tape_do_io_free(device, request);
+        if (rc == 0) {
+                rc = tape_mtop(device, MTBSR, 1);
+                if (rc > 0)
+                        rc = 0;
+        }
+
+        return rc;
+}
+
+/*
+ * MTREW: Rewind the tape.
+ */
+int
+tape_std_mtrew(struct tape_device *device, int mt_count)
+{
+        struct tape_request *request;
+
+        request = tape_alloc_request(3, 0);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+        request->op = TO_REW;
+        /* setup ccws */
+        tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
+                    device->modeset_byte);
+        tape_ccw_cc(request->cpaddr + 1, REWIND, 0, NULL);
+        tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
+
+        /* execute it */
+        return tape_do_io_free(device, request);
+}
+
+/*
+ * MTOFFL: Rewind the tape and put the drive off-line.
+ * Implement 'rewind unload'
+ */
+int
+tape_std_mtoffl(struct tape_device *device, int mt_count)
+{
+        struct tape_request *request;
+
+        request = tape_alloc_request(3, 0);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+        request->op = TO_RUN;
+        /* setup ccws */
+        tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
+        tape_ccw_cc(request->cpaddr + 1, REWIND_UNLOAD, 0, NULL);
+        tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
+
+        /* execute it */
+        return tape_do_io_free(device, request);
+}
+
+/*
+ * MTNOP: 'No operation'.
+ */
+int
+tape_std_mtnop(struct tape_device *device, int mt_count)
+{
+        struct tape_request *request;
+
+        request = tape_alloc_request(2, 0);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+        request->op = TO_NOP;
+        /* setup ccws */
+        tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
+        tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL);
+        /* execute it */
+        return tape_do_io_free(device, request);
+}
+
+/*
+ * MTEOM: positions at the end of the portion of the tape already used
+ * for recordind data. MTEOM positions after the last file mark, ready for
+ * appending another file.
+ */
+int
+tape_std_mteom(struct tape_device *device, int mt_count)
+{
+        int rc;
+
+        /*
+         * Seek from the beginning of tape (rewind).
+         */
+        if ((rc = tape_mtop(device, MTREW, 1)) < 0)
+                return rc;
+
+        /*
+         * The logical end of volume is given by two sewuential tapemarks.
+         * Look for this by skipping to the next file (over one tapemark)
+         * and then test for another one (fsr returns 1 if a tapemark was
+         * encountered).
+         */
+        do {
+                if ((rc = tape_mtop(device, MTFSF, 1)) < 0)
+                        return rc;
+                if ((rc = tape_mtop(device, MTFSR, 1)) < 0)
+                        return rc;
+        } while (rc == 0);
+
+        return tape_mtop(device, MTBSR, 1);
+}
+
+/*
+ * MTRETEN: Retension the tape, i.e. forward space to end of tape and rewind.
+ */
+int
+tape_std_mtreten(struct tape_device *device, int mt_count)
+{
+        struct tape_request *request;
+        int rc;
+
+        request = tape_alloc_request(4, 0);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+        request->op = TO_FSF;
+        /* setup ccws */
+        tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
+        tape_ccw_cc(request->cpaddr + 1,FORSPACEFILE, 0, NULL);
+        tape_ccw_cc(request->cpaddr + 2, NOP, 0, NULL);
+        tape_ccw_end(request->cpaddr + 3, CCW_CMD_TIC, 0, request->cpaddr);
+        /* execute it, MTRETEN rc gets ignored */
+        rc = tape_do_io_interruptible(device, request);
+        tape_free_request(request);
+        return tape_mtop(device, MTREW, 1);
+}
+
+/*
+ * MTERASE: erases the tape.
+ */
+int
+tape_std_mterase(struct tape_device *device, int mt_count)
+{
+        struct tape_request *request;
+
+        request = tape_alloc_request(6, 0);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+        request->op = TO_DSE;
+        /* setup ccws */
+        tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
+        tape_ccw_cc(request->cpaddr + 1, REWIND, 0, NULL);
+        tape_ccw_cc(request->cpaddr + 2, ERASE_GAP, 0, NULL);
+        tape_ccw_cc(request->cpaddr + 3, DATA_SEC_ERASE, 0, NULL);
+        tape_ccw_cc(request->cpaddr + 4, REWIND, 0, NULL);
+        tape_ccw_end(request->cpaddr + 5, NOP, 0, NULL);
+
+        /* execute it */
+        return tape_do_io_free(device, request);
+}
+
+/*
+ * MTUNLOAD: Rewind the tape and unload it.
+ */
+int
+tape_std_mtunload(struct tape_device *device, int mt_count)
+{
+        return tape_mtop(device, MTOFFL, mt_count);
+}
+
+/*
+ * MTCOMPRESSION: used to enable compression.
+ * Sets the IDRC on/off.
+ */
+int
+tape_std_mtcompression(struct tape_device *device, int mt_count)
+{
+        struct tape_request *request;
+
+        if (mt_count < 0 || mt_count > 1) {
+                DBF_EXCEPTION(6, "xcom parm\n");
+                if (*device->modeset_byte & 0x08)
+                        PRINT_INFO("(%s) Compression is currently on\n",
+                                   device->cdev->dev.bus_id);
+                else
+                        PRINT_INFO("(%s) Compression is currently off\n",
+                                   device->cdev->dev.bus_id);
+                PRINT_INFO("Use 1 to switch compression on, 0 to "
+                           "switch it off\n");
+                return -EINVAL;
+        }
+        request = tape_alloc_request(2, 0);
+        if (IS_ERR(request))
+                return PTR_ERR(request);
+        request->op = TO_NOP;
+        /* setup ccws */
+        *device->modeset_byte = (mt_count == 0) ? 0x00 : 0x08;
+        tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
+        tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL);
+        /* execute it */
+        return tape_do_io_free(device, request);
+}
+
+/*
+ * Read Block
+ */
+struct tape_request *
+tape_std_read_block(struct tape_device *device, size_t count)
+{
+        struct tape_request *request;
+
+        /*
+         * We have to alloc 4 ccws in order to be able to transform request
+         * into a read backward request in error case.
+         */
+        request = tape_alloc_request(4, 0);
+        if (IS_ERR(request)) {
+                DBF_EXCEPTION(6, "xrbl fail");
+                return request;
+        }
+        request->op = TO_RFO;
+        tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
+        tape_ccw_end_idal(request->cpaddr + 1, READ_FORWARD,
+                          device->char_data.idal_buf);
+        DBF_EVENT(6, "xrbl ccwg\n");
+        return request;
+}
+
+/*
+ * Read Block backward transformation function.
+ */
+void
+tape_std_read_backward(struct tape_device *device, struct tape_request *request)
+{
+        /*
+         * We have allocated 4 ccws in tape_std_read, so we can now
+         * transform the request to a read backward, followed by a
+         * forward space block.
+         */
+        request->op = TO_RBA;
+        tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
+        tape_ccw_cc_idal(request->cpaddr + 1, READ_BACKWARD,
+                         device->char_data.idal_buf);
+        tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL);
+        tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL);
+        DBF_EVENT(6, "xrop ccwg");}
+
+/*
+ * Write Block
+ */
+struct tape_request *
+tape_std_write_block(struct tape_device *device, size_t count)
+{
+        struct tape_request *request;
+
+        request = tape_alloc_request(2, 0);
+        if (IS_ERR(request)) {
+                DBF_EXCEPTION(6, "xwbl fail\n");
+                return request;
+        }
+        request->op = TO_WRI;
+        tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
+        tape_ccw_end_idal(request->cpaddr + 1, WRITE_CMD,
+                          device->char_data.idal_buf);
+        DBF_EVENT(6, "xwbl ccwg\n");
+        return request;
+}
+
+/*
+ * This routine is called by frontend after an ENOSP on write
+ */
+void
+tape_std_process_eov(struct tape_device *device)
+{
+        /*
+         * End of volume: We have to backspace the last written record, then
+         * we TRY to write a tapemark and then backspace over the written TM
+         */
+        if (tape_mtop(device, MTBSR, 1) == 0 &&
+            tape_mtop(device, MTWEOF, 1) == 0) {
+                tape_mtop(device, MTBSR, 1);
+        }
+}
+
+EXPORT_SYMBOL(tape_std_assign);
+EXPORT_SYMBOL(tape_std_unassign);
+EXPORT_SYMBOL(tape_std_display);
+EXPORT_SYMBOL(tape_std_read_block_id);
+EXPORT_SYMBOL(tape_std_mtload);
+EXPORT_SYMBOL(tape_std_mtsetblk);
+EXPORT_SYMBOL(tape_std_mtreset);
+EXPORT_SYMBOL(tape_std_mtfsf);
+EXPORT_SYMBOL(tape_std_mtfsr);
+EXPORT_SYMBOL(tape_std_mtbsr);
+EXPORT_SYMBOL(tape_std_mtweof);
+EXPORT_SYMBOL(tape_std_mtbsfm);
+EXPORT_SYMBOL(tape_std_mtbsf);
+EXPORT_SYMBOL(tape_std_mtfsfm);
+EXPORT_SYMBOL(tape_std_mtrew);
+EXPORT_SYMBOL(tape_std_mtoffl);
+EXPORT_SYMBOL(tape_std_mtnop);
+EXPORT_SYMBOL(tape_std_mteom);
+EXPORT_SYMBOL(tape_std_mtreten);
+EXPORT_SYMBOL(tape_std_mterase);
+EXPORT_SYMBOL(tape_std_mtunload);
+EXPORT_SYMBOL(tape_std_mtcompression);
+EXPORT_SYMBOL(tape_std_read_block);
+EXPORT_SYMBOL(tape_std_read_backward);
+EXPORT_SYMBOL(tape_std_write_block);
+EXPORT_SYMBOL(tape_std_process_eov);