[PATCH] s390: 3590 tape driver
authorStefan Bader <shbader@de.ibm.com>
Fri, 24 Mar 2006 11:15:29 +0000 (03:15 -0800)
committerLinus Torvalds <torvalds@g5.osdl.org>
Fri, 24 Mar 2006 15:33:18 +0000 (07:33 -0800)
      Michael Holzheu <holzheu@de.ibm.com>,
      Martin Schwidefsky <schwidefsky@de.ibm.com>

Signed-off-by: Stefan Bader <shbader@de.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
drivers/s390/Kconfig
drivers/s390/char/Makefile
drivers/s390/char/tape_34xx.c
drivers/s390/char/tape_3590.c [new file with mode: 0644]
drivers/s390/char/tape_3590.h [new file with mode: 0644]
drivers/s390/char/tape_std.h

index 721787cc5a1c71ef69e50d777cef841ccf23c637..4d36208ff8de3cd3624f995948e4600843a08df9 100644 (file)
@@ -183,7 +183,13 @@ config S390_TAPE_34XX
          tape subsystems and 100% compatibles.
          It is safe to say "Y" here.
 
-
+config S390_TAPE_3590
+       tristate "Support for 3590 tape hardware"
+       depends on S390_TAPE
+       help
+         Select this option if you want to access IBM 3590 magnetic
+         tape subsystems and 100% compatibles.
+         It is safe to say "Y" here.
 
 config VMLOGRDR
        tristate "Support for the z/VM recording system services (VM only)"
index 6377a96735df87ccbd5d506b56ee964817940f9c..0c0162ff6c0c003e6ec393c8686b3ba8fb98bf3d 100644 (file)
@@ -26,4 +26,5 @@ tape-$(CONFIG_PROC_FS) += tape_proc.o
 tape-objs := tape_core.o tape_std.o tape_char.o $(tape-y)
 obj-$(CONFIG_S390_TAPE) += tape.o tape_class.o
 obj-$(CONFIG_S390_TAPE_34XX) += tape_34xx.o
+obj-$(CONFIG_S390_TAPE_3590) += tape_3590.o
 obj-$(CONFIG_MONREADER) += monreader.o
index 682039cac15b7d0bbdf68b5f5fa5040a986a7bbf..d4f2da7380784850d354515a29434b16fe457b86 100644 (file)
@@ -2,8 +2,7 @@
  *  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
+ *    Copyright (C) IBM Corp. 2001,2006
  *    Author(s): Carsten Otte <cotte@de.ibm.com>
  *              Tuan Ngo-Anh <ngoanh@de.ibm.com>
  *              Martin Schwidefsky <schwidefsky@de.ibm.com>
 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
diff --git a/drivers/s390/char/tape_3590.c b/drivers/s390/char/tape_3590.c
new file mode 100644 (file)
index 0000000..c3915f6
--- /dev/null
@@ -0,0 +1,1301 @@
+/*
+ *  drivers/s390/char/tape_3590.c
+ *    tape device discipline for 3590 tapes.
+ *
+ *    Copyright (C) IBM Corp. 2001,2006
+ *    Author(s): Stefan Bader <shbader@de.ibm.com>
+ *              Michael Holzheu <holzheu@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>
+
+#define TAPE_DBF_AREA  tape_3590_dbf
+
+#include "tape.h"
+#include "tape_std.h"
+#include "tape_3590.h"
+
+/*
+ * Pointer to debug area.
+ */
+debug_info_t *TAPE_DBF_AREA = NULL;
+EXPORT_SYMBOL(TAPE_DBF_AREA);
+
+/*******************************************************************
+ * Error Recovery fuctions:
+ * - Read Opposite:             implemented
+ * - Read Device (buffered) log: BRA
+ * - Read Library log:          BRA
+ * - Swap Devices:              BRA
+ * - Long Busy:                         BRA
+ * - Special Intercept:                 BRA
+ * - Read Alternate:            implemented
+ *******************************************************************/
+
+#define PRINTK_HEADER "TAPE_3590: "
+
+static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = {
+       [0x00] = "",
+       [0x10] = "Lost Sense",
+       [0x11] = "Assigned Elsewhere",
+       [0x12] = "Allegiance Reset",
+       [0x13] = "Shared Access Violation",
+       [0x20] = "Command Reject",
+       [0x21] = "Configuration Error",
+       [0x22] = "Protection Exception",
+       [0x23] = "Write Protect",
+       [0x24] = "Write Length",
+       [0x25] = "Read-Only Format",
+       [0x31] = "Beginning of Partition",
+       [0x33] = "End of Partition",
+       [0x34] = "End of Data",
+       [0x35] = "Block not found",
+       [0x40] = "Device Intervention",
+       [0x41] = "Loader Intervention",
+       [0x42] = "Library Intervention",
+       [0x50] = "Write Error",
+       [0x51] = "Erase Error",
+       [0x52] = "Formatting Error",
+       [0x53] = "Read Error",
+       [0x54] = "Unsupported Format",
+       [0x55] = "No Formatting",
+       [0x56] = "Positioning lost",
+       [0x57] = "Read Length",
+       [0x60] = "Unsupported Medium",
+       [0x61] = "Medium Length Error",
+       [0x62] = "Medium removed",
+       [0x64] = "Load Check",
+       [0x65] = "Unload Check",
+       [0x70] = "Equipment Check",
+       [0x71] = "Bus out Check",
+       [0x72] = "Protocol Error",
+       [0x73] = "Interface Error",
+       [0x74] = "Overrun",
+       [0x75] = "Halt Signal",
+       [0x90] = "Device fenced",
+       [0x91] = "Device Path fenced",
+       [0xa0] = "Volume misplaced",
+       [0xa1] = "Volume inaccessible",
+       [0xa2] = "Volume in input",
+       [0xa3] = "Volume ejected",
+       [0xa4] = "All categories reserved",
+       [0xa5] = "Duplicate Volume",
+       [0xa6] = "Library Manager Offline",
+       [0xa7] = "Library Output Station full",
+       [0xa8] = "Vision System non-operational",
+       [0xa9] = "Library Manager Equipment Check",
+       [0xaa] = "Library Equipment Check",
+       [0xab] = "All Library Cells full",
+       [0xac] = "No Cleaner Volumes in Library",
+       [0xad] = "I/O Station door open",
+       [0xae] = "Subsystem environmental alert",
+};
+
+/*
+ * 3590 IOCTL Overload
+ */
+static int
+tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg)
+{
+       switch (cmd) {
+       case TAPE390_DISPLAY: {
+               struct display_struct disp;
+
+               if (copy_from_user(&disp, (char __user *) arg, sizeof(disp)))
+                       return -EFAULT;
+
+               return tape_std_display(device, &disp);
+       }
+       default:
+               return -EINVAL; /* no additional ioctls */
+       }
+}
+
+/*
+ * SENSE Medium: Get Sense data about medium state
+ */
+static int
+tape_3590_sense_medium(struct tape_device *device)
+{
+       struct tape_request *request;
+
+       request = tape_alloc_request(1, 128);
+       if (IS_ERR(request))
+               return PTR_ERR(request);
+       request->op = TO_MSEN;
+       tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata);
+       return tape_do_io_free(device, request);
+}
+
+/*
+ * MTTELL: Tell block. Return the number of block relative to current file.
+ */
+static int
+tape_3590_mttell(struct tape_device *device, int mt_count)
+{
+       __u64 block_id;
+       int rc;
+
+       rc = tape_std_read_block_id(device, &block_id);
+       if (rc)
+               return rc;
+       return block_id >> 32;
+}
+
+/*
+ * MTSEEK: seek to the specified block.
+ */
+static int
+tape_3590_mtseek(struct tape_device *device, int count)
+{
+       struct tape_request *request;
+
+       DBF_EVENT(6, "xsee id: %x\n", count);
+       request = tape_alloc_request(3, 4);
+       if (IS_ERR(request))
+               return PTR_ERR(request);
+       request->op = TO_LBL;
+       tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
+       *(__u32 *) request->cpdata = count;
+       tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
+       tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
+       return tape_do_io_free(device, request);
+}
+
+/*
+ * Read Opposite Error Recovery Function:
+ * Used, when Read Forward does not work
+ */
+static void
+tape_3590_read_opposite(struct tape_device *device,
+                       struct tape_request *request)
+{
+       struct tape_3590_disc_data *data;
+
+       /*
+        * 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);
+       data = device->discdata;
+       tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op,
+                        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\n");
+}
+
+/*
+ * Read Attention Msg
+ * This should be done after an interrupt with attention bit (0x80)
+ * in device state.
+ *
+ * After a "read attention message" request there are two possible
+ * results:
+ *
+ * 1. A unit check is presented, when attention sense is present (e.g. when
+ * a medium has been unloaded). The attention sense comes then
+ * together with the unit check. The recovery action is either "retry"
+ * (in case there is an attention message pending) or "permanent error".
+ *
+ * 2. The attention msg is written to the "read subsystem data" buffer.
+ * In this case we probably should print it to the console.
+ */
+static int
+tape_3590_read_attmsg(struct tape_device *device)
+{
+       struct tape_request *request;
+       char *buf;
+
+       request = tape_alloc_request(3, 4096);
+       if (IS_ERR(request))
+               return PTR_ERR(request);
+       request->op = TO_READ_ATTMSG;
+       buf = request->cpdata;
+       buf[0] = PREP_RD_SS_DATA;
+       buf[6] = RD_ATTMSG;     /* read att msg */
+       tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf);
+       tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12);
+       tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
+       return tape_do_io_free(device, request);
+}
+
+/*
+ * These functions are used to schedule follow-up actions from within an
+ * interrupt context (like unsolicited interrupts).
+ */
+static void
+tape_3590_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_3590_sense_medium(p->device);
+               break;
+       case TO_READ_ATTMSG:
+               tape_3590_read_attmsg(p->device);
+               break;
+       default:
+               DBF_EVENT(3, "T3590: work handler undefined for "
+                         "operation 0x%02x\n", p->op);
+       }
+       tape_put_device(p->device);
+       kfree(p);
+}
+
+static int
+tape_3590_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 = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
+               return -ENOMEM;
+
+       INIT_WORK(&p->work, tape_3590_work_handler, p);
+
+       p->device = tape_get_device_reference(device);
+       p->op = op;
+
+       schedule_work(&p->work);
+       return 0;
+}
+
+#ifdef CONFIG_S390_TAPE_BLOCK
+/*
+ * Tape Block READ
+ */
+static struct tape_request *
+tape_3590_bread(struct tape_device *device, struct request *req)
+{
+       struct tape_request *request;
+       struct ccw1 *ccw;
+       int count = 0, start_block, i;
+       unsigned off;
+       char *dst;
+       struct bio_vec *bv;
+       struct bio *bio;
+
+       DBF_EVENT(6, "xBREDid:");
+       start_block = req->sector >> TAPEBLOCK_HSEC_S2B;
+       DBF_EVENT(6, "start_block = %i\n", start_block);
+
+       rq_for_each_bio(bio, req) {
+               bio_for_each_segment(bv, bio, i) {
+                       count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9);
+               }
+       }
+       request = tape_alloc_request(2 + count + 1, 4);
+       if (IS_ERR(request))
+               return request;
+       request->op = TO_BLOCK;
+       *(__u32 *) request->cpdata = start_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.
+        */
+       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;
+                       }
+                       if (off > bv->bv_len)
+                               BUG();
+               }
+       }
+       ccw = tape_ccw_end(ccw, NOP, 0, NULL);
+       DBF_EVENT(6, "xBREDccwg\n");
+       return request;
+}
+
+static void
+tape_3590_free_bread(struct tape_request *request)
+{
+       struct ccw1 *ccw;
+
+       /* Last ccw is a nop and doesn't need clear_normalized_cda */
+       for (ccw = request->cpaddr; 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_3590_check_locate(struct tape_device *device, struct tape_request *request)
+{
+       __u32 *start_block;
+
+       start_block = (__u32 *) request->cpdata;
+       if (*start_block != device->blk_data.block_position) {
+               /* Add the start offset of the file to get the real block. */
+               *start_block += device->bof;
+               tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
+       }
+}
+#endif
+
+/*
+ * The done handler is called at device/channel end and wakes up the sleeping
+ * process
+ */
+static int
+tape_3590_done(struct tape_device *device, struct tape_request *request)
+{
+       struct tape_3590_med_sense *sense;
+
+       DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]);
+
+       switch (request->op) {
+       case TO_BSB:
+       case TO_BSF:
+       case TO_DSE:
+       case TO_FSB:
+       case TO_FSF:
+       case TO_LBL:
+       case TO_RFO:
+       case TO_RBA:
+       case TO_REW:
+       case TO_WRI:
+       case TO_WTM:
+       case TO_BLOCK:
+       case TO_LOAD:
+               tape_med_state_set(device, MS_LOADED);
+               break;
+       case TO_RUN:
+               tape_med_state_set(device, MS_UNLOADED);
+               break;
+       case TO_MSEN:
+               sense = (struct tape_3590_med_sense *) request->cpdata;
+               if (sense->masst == MSENSE_UNASSOCIATED)
+                       tape_med_state_set(device, MS_UNLOADED);
+               if (sense->masst == MSENSE_ASSOCIATED_MOUNT)
+                       tape_med_state_set(device, MS_LOADED);
+               break;
+       case TO_RBI:    /* RBI seems to succeed even without medium loaded. */
+       case TO_NOP:    /* Same to NOP. */
+       case TO_READ_CONFIG:
+       case TO_READ_ATTMSG:
+       case TO_DIS:
+       case TO_ASSIGN:
+       case TO_UNASSIGN:
+               break;
+       case TO_SIZE:
+               break;
+       }
+       return TAPE_IO_SUCCESS;
+}
+
+/*
+ * This fuction is called, when error recovery was successfull
+ */
+static inline int
+tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request)
+{
+       DBF_EVENT(3, "Error Recovery successfull for %s\n",
+                 tape_op_verbose[request->op]);
+       return tape_3590_done(device, request);
+}
+
+/*
+ * This fuction is called, when error recovery was not successfull
+ */
+static inline int
+tape_3590_erp_failed(struct tape_device *device, struct tape_request *request,
+                    struct irb *irb, int rc)
+{
+       DBF_EVENT(3, "Error Recovery failed for %s\n",
+                 tape_op_verbose[request->op]);
+       tape_dump_sense_dbf(device, request, irb);
+       return rc;
+}
+
+/*
+ * Error Recovery do retry
+ */
+static inline int
+tape_3590_erp_retry(struct tape_device *device, struct tape_request *request,
+                   struct irb *irb)
+{
+       DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]);
+       tape_dump_sense_dbf(device, request, irb);
+       return TAPE_IO_RETRY;
+}
+
+/*
+ * Handle unsolicited interrupts
+ */
+static int
+tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb)
+{
+       if (irb->scsw.dstat == DEV_STAT_CHN_END)
+               /* Probably result of halt ssch */
+               return TAPE_IO_PENDING;
+       else if (irb->scsw.dstat == 0x85)
+               /* Device Ready -> check medium state */
+               tape_3590_schedule_work(device, TO_MSEN);
+       else if (irb->scsw.dstat & DEV_STAT_ATTENTION)
+               tape_3590_schedule_work(device, TO_READ_ATTMSG);
+       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;
+}
+
+/*
+ * Basic Recovery routine
+ */
+static int
+tape_3590_erp_basic(struct tape_device *device, struct tape_request *request,
+                   struct irb *irb, int rc)
+{
+       struct tape_3590_sense *sense;
+
+       sense = (struct tape_3590_sense *) irb->ecw;
+
+       switch (sense->bra) {
+       case SENSE_BRA_PER:
+               return tape_3590_erp_failed(device, request, irb, rc);
+       case SENSE_BRA_CONT:
+               return tape_3590_erp_succeded(device, request);
+       case SENSE_BRA_RE:
+               return tape_3590_erp_retry(device, request, irb);
+       case SENSE_BRA_DRE:
+               return tape_3590_erp_failed(device, request, irb, rc);
+       default:
+               PRINT_ERR("Unknown BRA %x - This should not happen!\n",
+                         sense->bra);
+               BUG();
+               return TAPE_IO_STOP;
+       }
+}
+
+/*
+ *  RDL: Read Device (buffered) log
+ */
+static int
+tape_3590_erp_read_buf_log(struct tape_device *device,
+                          struct tape_request *request, struct irb *irb)
+{
+       /*
+        * We just do the basic error recovery at the moment (retry).
+        * Perhaps in the future, we read the log and dump it somewhere...
+        */
+       return tape_3590_erp_basic(device, request, irb, -EIO);
+}
+
+/*
+ *  SWAP: Swap Devices
+ */
+static int
+tape_3590_erp_swap(struct tape_device *device, struct tape_request *request,
+                  struct irb *irb)
+{
+       /*
+        * This error recovery should swap the tapes
+        * if the original has a problem. The operation
+        * should proceed with the new tape... this
+        * should probably be done in user space!
+        */
+       PRINT_WARN("(%s): Swap Tape Device!\n", device->cdev->dev.bus_id);
+       return tape_3590_erp_basic(device, request, irb, -EIO);
+}
+
+/*
+ *  LBY: Long Busy
+ */
+static int
+tape_3590_erp_long_busy(struct tape_device *device,
+                       struct tape_request *request, struct irb *irb)
+{
+       /* FIXME: how about WAITING for a minute ? */
+       PRINT_WARN("(%s): Device is busy! Please wait a minute!\n",
+                  device->cdev->dev.bus_id);
+       return tape_3590_erp_basic(device, request, irb, -EBUSY);
+}
+
+/*
+ *  SPI: Special Intercept
+ */
+static int
+tape_3590_erp_special_interrupt(struct tape_device *device,
+                               struct tape_request *request, struct irb *irb)
+{
+       return tape_3590_erp_basic(device, request, irb, -EIO);
+}
+
+/*
+ *  RDA: Read Alternate
+ */
+static int
+tape_3590_erp_read_alternate(struct tape_device *device,
+                            struct tape_request *request, struct irb *irb)
+{
+       struct tape_3590_disc_data *data;
+
+       /*
+        * The issued Read Backward or Read Previous command is not
+        * supported by the device
+        * The recovery action should be to issue another command:
+        * Read Revious: if Read Backward is not supported
+        * Read Backward: if Read Previous is not supported
+        */
+       data = device->discdata;
+       if (data->read_back_op == READ_PREVIOUS) {
+               DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n",
+                         device->cdev_id);
+               data->read_back_op = READ_BACKWARD;
+       } else {
+               DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n",
+                         device->cdev_id);
+               data->read_back_op = READ_PREVIOUS;
+       }
+       tape_3590_read_opposite(device, request);
+       return tape_3590_erp_retry(device, request, irb);
+}
+
+/*
+ * Error Recovery read opposite
+ */
+static int
+tape_3590_erp_read_opposite(struct tape_device *device,
+                           struct tape_request *request, struct irb *irb)
+{
+       switch (request->op) {
+       case TO_RFO:
+               /*
+                * We did read forward, but the data could not be read.
+                * We will read backward and then skip forward again.
+                */
+               tape_3590_read_opposite(device, request);
+               return tape_3590_erp_retry(device, request, irb);
+       case TO_RBA:
+               /* We tried to read forward and backward, but hat no success */
+               return tape_3590_erp_failed(device, request, irb, -EIO);
+               break;
+       default:
+               PRINT_WARN("read_opposite_recovery_called_with_op: %s\n",
+                          tape_op_verbose[request->op]);
+               return tape_3590_erp_failed(device, request, irb, -EIO);
+       }
+}
+
+/*
+ * Print an MIM (Media Information  Message) (message code f0)
+ */
+static void
+tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb)
+{
+       struct tape_3590_sense *sense;
+
+       sense = (struct tape_3590_sense *) irb->ecw;
+       /* Exception Message */
+       switch (sense->fmt.f70.emc) {
+       case 0x02:
+               PRINT_WARN("(%s): Data degraded\n", device->cdev->dev.bus_id);
+               break;
+       case 0x03:
+               PRINT_WARN("(%s): Data degraded in partion %i\n",
+                          device->cdev->dev.bus_id, sense->fmt.f70.mp);
+               break;
+       case 0x04:
+               PRINT_WARN("(%s): Medium degraded\n", device->cdev->dev.bus_id);
+               break;
+       case 0x05:
+               PRINT_WARN("(%s): Medium degraded in partition %i\n",
+                          device->cdev->dev.bus_id, sense->fmt.f70.mp);
+               break;
+       case 0x06:
+               PRINT_WARN("(%s): Block 0 Error\n", device->cdev->dev.bus_id);
+               break;
+       case 0x07:
+               PRINT_WARN("(%s): Medium Exception 0x%02x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f70.md);
+               break;
+       default:
+               PRINT_WARN("(%s): MIM ExMsg: 0x%02x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f70.emc);
+               break;
+       }
+       /* Service Message */
+       switch (sense->fmt.f70.smc) {
+       case 0x02:
+               PRINT_WARN("(%s): Reference Media maintenance procedure %i\n",
+                          device->cdev->dev.bus_id, sense->fmt.f70.md);
+               break;
+       default:
+               PRINT_WARN("(%s): MIM ServiceMsg: 0x%02x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f70.smc);
+               break;
+       }
+}
+
+/*
+ * Print an I/O Subsystem Service Information Message (message code f1)
+ */
+static void
+tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb)
+{
+       struct tape_3590_sense *sense;
+
+       sense = (struct tape_3590_sense *) irb->ecw;
+       /* Exception Message */
+       switch (sense->fmt.f71.emc) {
+       case 0x01:
+               PRINT_WARN("(%s): Effect of failure is unknown\n",
+                          device->cdev->dev.bus_id);
+               break;
+       case 0x02:
+               PRINT_WARN("(%s): CU Exception - no performance impact\n",
+                          device->cdev->dev.bus_id);
+               break;
+       case 0x03:
+               PRINT_WARN("(%s): CU Exception on channel interface 0x%02x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
+               break;
+       case 0x04:
+               PRINT_WARN("(%s): CU Exception on device path 0x%02x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
+               break;
+       case 0x05:
+               PRINT_WARN("(%s): CU Exception on library path 0x%02x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
+               break;
+       case 0x06:
+               PRINT_WARN("(%s): CU Exception on node 0x%02x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
+               break;
+       case 0x07:
+               PRINT_WARN("(%s): CU Exception on partition 0x%02x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
+               break;
+       default:
+               PRINT_WARN("(%s): SIM ExMsg: 0x%02x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f71.emc);
+       }
+       /* Service Message */
+       switch (sense->fmt.f71.smc) {
+       case 0x01:
+               PRINT_WARN("(%s): Repair impact is unknown\n",
+                          device->cdev->dev.bus_id);
+               break;
+       case 0x02:
+               PRINT_WARN("(%s): Repair will not impact cu performance\n",
+                          device->cdev->dev.bus_id);
+               break;
+       case 0x03:
+               if (sense->fmt.f71.mdf == 0)
+                       PRINT_WARN("(%s): Repair will disable node "
+                                  "0x%x on CU\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1]);
+               else
+                       PRINT_WARN("(%s): Repair will disable nodes "
+                                  "(0x%x-0x%x) on CU\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
+               break;
+       case 0x04:
+               if (sense->fmt.f71.mdf == 0)
+                       PRINT_WARN("(%s): Repair will disable cannel path "
+                                  "0x%x on CU\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1]);
+               else
+                       PRINT_WARN("(%s): Repair will disable cannel paths "
+                                  "(0x%x-0x%x) on CU\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
+               break;
+       case 0x05:
+               if (sense->fmt.f71.mdf == 0)
+                       PRINT_WARN("(%s): Repair will disable device path "
+                                  "0x%x on CU\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1]);
+               else
+                       PRINT_WARN("(%s): Repair will disable device paths "
+                                  "(0x%x-0x%x) on CU\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
+               break;
+       case 0x06:
+               if (sense->fmt.f71.mdf == 0)
+                       PRINT_WARN("(%s): Repair will disable library path "
+                                  "0x%x on CU\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1]);
+               else
+                       PRINT_WARN("(%s): Repair will disable library paths "
+                                  "(0x%x-0x%x) on CU\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
+               break;
+       case 0x07:
+               PRINT_WARN("(%s): Repair will disable access to CU\n",
+                          device->cdev->dev.bus_id);
+               break;
+       default:
+               PRINT_WARN("(%s): SIM ServiceMsg: 0x%02x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f71.smc);
+       }
+}
+
+/*
+ * Print an Device Subsystem Service Information Message (message code f2)
+ */
+static void
+tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb)
+{
+       struct tape_3590_sense *sense;
+
+       sense = (struct tape_3590_sense *) irb->ecw;
+       /* Exception Message */
+       switch (sense->fmt.f71.emc) {
+       case 0x01:
+               PRINT_WARN("(%s): Effect of failure is unknown\n",
+                          device->cdev->dev.bus_id);
+               break;
+       case 0x02:
+               PRINT_WARN("(%s): DV Exception - no performance impact\n",
+                          device->cdev->dev.bus_id);
+               break;
+       case 0x03:
+               PRINT_WARN("(%s): DV Exception on channel interface 0x%02x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
+               break;
+       case 0x04:
+               PRINT_WARN("(%s): DV Exception on loader 0x%02x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
+               break;
+       case 0x05:
+               PRINT_WARN("(%s): DV Exception on message display 0x%02x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
+               break;
+       case 0x06:
+               PRINT_WARN("(%s): DV Exception in tape path\n",
+                          device->cdev->dev.bus_id);
+               break;
+       case 0x07:
+               PRINT_WARN("(%s): DV Exception in drive\n",
+                          device->cdev->dev.bus_id);
+               break;
+       default:
+               PRINT_WARN("(%s): DSIM ExMsg: 0x%02x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f71.emc);
+       }
+       /* Service Message */
+       switch (sense->fmt.f71.smc) {
+       case 0x01:
+               PRINT_WARN("(%s): Repair impact is unknown\n",
+                          device->cdev->dev.bus_id);
+               break;
+       case 0x02:
+               PRINT_WARN("(%s): Repair will not impact device performance\n",
+                          device->cdev->dev.bus_id);
+               break;
+       case 0x03:
+               if (sense->fmt.f71.mdf == 0)
+                       PRINT_WARN("(%s): Repair will disable channel path "
+                                  "0x%x on DV\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1]);
+               else
+                       PRINT_WARN("(%s): Repair will disable channel path "
+                                  "(0x%x-0x%x) on DV\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
+               break;
+       case 0x04:
+               if (sense->fmt.f71.mdf == 0)
+                       PRINT_WARN("(%s): Repair will disable interface 0x%x "
+                                  "on DV\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1]);
+               else
+                       PRINT_WARN("(%s): Repair will disable interfaces "
+                                  "(0x%x-0x%x) on DV\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
+               break;
+       case 0x05:
+               if (sense->fmt.f71.mdf == 0)
+                       PRINT_WARN("(%s): Repair will disable loader 0x%x "
+                                  "on DV\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1]);
+               else
+                       PRINT_WARN("(%s): Repair will disable loader "
+                                  "(0x%x-0x%x) on DV\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
+               break;
+       case 0x07:
+               PRINT_WARN("(%s): Repair will disable access to DV\n",
+                          device->cdev->dev.bus_id);
+               break;
+       case 0x08:
+               if (sense->fmt.f71.mdf == 0)
+                       PRINT_WARN("(%s): Repair will disable message "
+                                  "display 0x%x on DV\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1]);
+               else
+                       PRINT_WARN("(%s): Repair will disable message "
+                                  "displays (0x%x-0x%x) on DV\n",
+                                  device->cdev->dev.bus_id,
+                                  sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
+               break;
+       case 0x09:
+               PRINT_WARN("(%s): Clean DV\n", device->cdev->dev.bus_id);
+               break;
+       default:
+               PRINT_WARN("(%s): DSIM ServiceMsg: 0x%02x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f71.smc);
+       }
+}
+
+/*
+ * Print standard ERA Message
+ */
+static void
+tape_3590_print_era_msg(struct tape_device *device, struct irb *irb)
+{
+       struct tape_3590_sense *sense;
+
+       sense = (struct tape_3590_sense *) irb->ecw;
+       if (sense->mc == 0)
+               return;
+       if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) {
+               if (tape_3590_msg[sense->mc] != NULL)
+                       PRINT_WARN("(%s): %s\n", device->cdev->dev.bus_id,
+                                  tape_3590_msg[sense->mc]);
+               else {
+                       PRINT_WARN("(%s): Message Code 0x%x\n",
+                                  device->cdev->dev.bus_id, sense->mc);
+               }
+               return;
+       }
+       if (sense->mc == 0xf0) {
+               /* Standard Media Information Message */
+               PRINT_WARN("(%s): MIM SEV=%i, MC=%02x, ES=%x/%x, "
+                          "RC=%02x-%04x-%02x\n", device->cdev->dev.bus_id,
+                          sense->fmt.f70.sev, sense->mc,
+                          sense->fmt.f70.emc, sense->fmt.f70.smc,
+                          sense->fmt.f70.refcode, sense->fmt.f70.mid,
+                          sense->fmt.f70.fid);
+               tape_3590_print_mim_msg_f0(device, irb);
+               return;
+       }
+       if (sense->mc == 0xf1) {
+               /* Standard I/O Subsystem Service Information Message */
+               PRINT_WARN("(%s): IOSIM SEV=%i, DEVTYPE=3590/%02x, "
+                          "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f71.sev,
+                          device->cdev->id.dev_model,
+                          sense->mc, sense->fmt.f71.emc,
+                          sense->fmt.f71.smc, sense->fmt.f71.refcode1,
+                          sense->fmt.f71.refcode2, sense->fmt.f71.refcode3);
+               tape_3590_print_io_sim_msg_f1(device, irb);
+               return;
+       }
+       if (sense->mc == 0xf2) {
+               /* Standard Device Service Information Message */
+               PRINT_WARN("(%s): DEVSIM SEV=%i, DEVTYPE=3590/%02x, "
+                          "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
+                          device->cdev->dev.bus_id, sense->fmt.f71.sev,
+                          device->cdev->id.dev_model,
+                          sense->mc, sense->fmt.f71.emc,
+                          sense->fmt.f71.smc, sense->fmt.f71.refcode1,
+                          sense->fmt.f71.refcode2, sense->fmt.f71.refcode3);
+               tape_3590_print_dev_sim_msg_f2(device, irb);
+               return;
+       }
+       if (sense->mc == 0xf3) {
+               /* Standard Library Service Information Message */
+               return;
+       }
+       PRINT_WARN("(%s): Device Message(%x)\n",
+                  device->cdev->dev.bus_id, sense->mc);
+}
+
+/*
+ *  3590 error Recovery routine:
+ *  If possible, it tries to recover from the error. If this is not possible,
+ *  inform the user about the problem.
+ */
+static int
+tape_3590_unit_check(struct tape_device *device, struct tape_request *request,
+                    struct irb *irb)
+{
+       struct tape_3590_sense *sense;
+       int rc;
+
+#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_3590_erp_failed(device, request, irb, -EIO);
+               else
+                       return tape_3590_erp_retry(device, request, irb);
+       }
+#endif
+
+       sense = (struct tape_3590_sense *) irb->ecw;
+
+       /*
+        * First check all RC-QRCs where we want to do something special
+        *   - "break":     basic error recovery is done
+        *   - "goto out:": just print error message if available
+        */
+       rc = -EIO;
+       switch (sense->rc_rqc) {
+
+       case 0x1110:
+               tape_3590_print_era_msg(device, irb);
+               return tape_3590_erp_read_buf_log(device, request, irb);
+
+       case 0x2011:
+               tape_3590_print_era_msg(device, irb);
+               return tape_3590_erp_read_alternate(device, request, irb);
+
+       case 0x2230:
+       case 0x2231:
+               tape_3590_print_era_msg(device, irb);
+               return tape_3590_erp_special_interrupt(device, request, irb);
+
+       case 0x3010:
+               DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n",
+                         device->cdev_id);
+               return tape_3590_erp_basic(device, request, irb, -ENOSPC);
+       case 0x3012:
+               DBF_EVENT(2, "(%08x): Forward at End of Partition\n",
+                         device->cdev_id);
+               return tape_3590_erp_basic(device, request, irb, -ENOSPC);
+       case 0x3020:
+               DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id);
+               return tape_3590_erp_basic(device, request, irb, -ENOSPC);
+
+       case 0x3122:
+               DBF_EVENT(2, "(%08x): Rewind Unload initiated\n",
+                         device->cdev_id);
+               return tape_3590_erp_basic(device, request, irb, -EIO);
+       case 0x3123:
+               DBF_EVENT(2, "(%08x): Rewind Unload complete\n",
+                         device->cdev_id);
+               tape_med_state_set(device, MS_UNLOADED);
+               return tape_3590_erp_basic(device, request, irb, 0);
+
+       case 0x4010:
+               /*
+                * print additional msg since default msg
+                * "device intervention" is not very meaningfull
+                */
+               PRINT_WARN("(%s): Tape operation when medium not loaded\n",
+                          device->cdev->dev.bus_id);
+               tape_med_state_set(device, MS_UNLOADED);
+               return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
+       case 0x4012:            /* Device Long Busy */
+               tape_3590_print_era_msg(device, irb);
+               return tape_3590_erp_long_busy(device, request, irb);
+
+       case 0x5010:
+               if (sense->rac == 0xd0) {
+                       /* Swap */
+                       tape_3590_print_era_msg(device, irb);
+                       return tape_3590_erp_swap(device, request, irb);
+               }
+               if (sense->rac == 0x26) {
+                       /* Read Opposite */
+                       tape_3590_print_era_msg(device, irb);
+                       return tape_3590_erp_read_opposite(device, request,
+                                                          irb);
+               }
+               return tape_3590_erp_basic(device, request, irb, -EIO);
+       case 0x5020:
+       case 0x5021:
+       case 0x5022:
+       case 0x5040:
+       case 0x5041:
+       case 0x5042:
+               tape_3590_print_era_msg(device, irb);
+               return tape_3590_erp_swap(device, request, irb);
+
+       case 0x5110:
+       case 0x5111:
+               return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
+
+       case 0x5120:
+       case 0x1120:
+               tape_med_state_set(device, MS_UNLOADED);
+               return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
+
+       case 0x6020:
+               PRINT_WARN("(%s): Cartridge of wrong type ?\n",
+                          device->cdev->dev.bus_id);
+               return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
+
+       case 0x8011:
+               PRINT_WARN("(%s): Another host has reserved the tape device\n",
+                          device->cdev->dev.bus_id);
+               return tape_3590_erp_basic(device, request, irb, -EPERM);
+       case 0x8013:
+               PRINT_WARN("(%s): Another host has priviliged access to the "
+                          "tape device\n", device->cdev->dev.bus_id);
+               PRINT_WARN("(%s): To solve the problem unload the current "
+                          "cartridge!\n", device->cdev->dev.bus_id);
+               return tape_3590_erp_basic(device, request, irb, -EPERM);
+       default:
+               return tape_3590_erp_basic(device, request, irb, -EIO);
+       }
+}
+
+/*
+ * 3590 interrupt handler:
+ */
+static int
+tape_3590_irq(struct tape_device *device, struct tape_request *request,
+             struct irb *irb)
+{
+       if (request == NULL)
+               return tape_3590_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 */
+               DBF_EVENT(2, "End of volume\n");
+               return tape_3590_erp_failed(device, request, irb, -ENOSPC);
+       }
+
+       if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK)
+               return tape_3590_unit_check(device, request, irb);
+
+       if (irb->scsw.dstat & DEV_STAT_DEV_END) {
+               if (irb->scsw.dstat == DEV_STAT_UNIT_EXCEP) {
+                       if (request->op == TO_FSB || request->op == TO_BSB)
+                               request->rescnt++;
+                       else
+                               DBF_EVENT(5, "Unit Exception!\n");
+               }
+
+               return tape_3590_done(device, request);
+       }
+
+       if (irb->scsw.dstat & DEV_STAT_CHN_END) {
+               DBF_EVENT(2, "cannel end\n");
+               return TAPE_IO_PENDING;
+       }
+
+       if (irb->scsw.dstat & DEV_STAT_ATTENTION) {
+               DBF_EVENT(2, "Unit Attention when busy..\n");
+               return TAPE_IO_PENDING;
+       }
+
+       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;
+}
+
+/*
+ * Setup device function
+ */
+static int
+tape_3590_setup_device(struct tape_device *device)
+{
+       int rc;
+       struct tape_3590_disc_data *data;
+
+       DBF_EVENT(6, "3590 device setup\n");
+       data = kmalloc(sizeof(struct tape_3590_disc_data),
+                      GFP_KERNEL | GFP_DMA);
+       if (data == NULL)
+               return -ENOMEM;
+       data->read_back_op = READ_PREVIOUS;
+       device->discdata = data;
+
+       if ((rc = tape_std_assign(device)) == 0) {
+               /* Try to find out if medium is loaded */
+               if ((rc = tape_3590_sense_medium(device)) != 0)
+                       DBF_LH(3, "3590 medium sense returned %d\n", rc);
+       }
+
+       return rc;
+}
+
+/*
+ * Cleanup device function
+ */
+static void
+tape_3590_cleanup_device(struct tape_device *device)
+{
+       tape_std_unassign(device);
+
+       kfree(device->discdata);
+       device->discdata = NULL;
+}
+
+/*
+ * List of 3590 magnetic tape commands.
+ */
+static tape_mtop_fn tape_3590_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_3590_mtseek,
+       [MTTELL]         = tape_3590_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 3590.
+ */
+static struct tape_discipline tape_discipline_3590 = {
+       .owner = THIS_MODULE,
+       .setup_device = tape_3590_setup_device,
+       .cleanup_device = tape_3590_cleanup_device,
+       .process_eov = tape_std_process_eov,
+       .irq = tape_3590_irq,
+       .read_block = tape_std_read_block,
+       .write_block = tape_std_write_block,
+#ifdef CONFIG_S390_TAPE_BLOCK
+       .bread = tape_3590_bread,
+       .free_bread = tape_3590_free_bread,
+       .check_locate = tape_3590_check_locate,
+#endif
+       .ioctl_fn = tape_3590_ioctl,
+       .mtop_array = tape_3590_mtop
+};
+
+static struct ccw_device_id tape_3590_ids[] = {
+       {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590},
+       { /* end of list */ }
+};
+
+static int
+tape_3590_online(struct ccw_device *cdev)
+{
+       return tape_generic_online(cdev->dev.driver_data,
+                                  &tape_discipline_3590);
+}
+
+static int
+tape_3590_offline(struct ccw_device *cdev)
+{
+       return tape_generic_offline(cdev->dev.driver_data);
+}
+
+static struct ccw_driver tape_3590_driver = {
+       .name = "tape_3590",
+       .owner = THIS_MODULE,
+       .ids = tape_3590_ids,
+       .probe = tape_generic_probe,
+       .remove = tape_generic_remove,
+       .set_offline = tape_3590_offline,
+       .set_online = tape_3590_online,
+};
+
+/*
+ * Setup discipline structure.
+ */
+static int
+tape_3590_init(void)
+{
+       int rc;
+
+       TAPE_DBF_AREA = debug_register("tape_3590", 2, 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, "3590 init\n");
+       /* Register driver for 3590 tapes. */
+       rc = ccw_driver_register(&tape_3590_driver);
+       if (rc)
+               DBF_EVENT(3, "3590 init failed\n");
+       else
+               DBF_EVENT(3, "3590 registered\n");
+       return rc;
+}
+
+static void
+tape_3590_exit(void)
+{
+       ccw_driver_unregister(&tape_3590_driver);
+
+       debug_unregister(TAPE_DBF_AREA);
+}
+
+MODULE_DEVICE_TABLE(ccw, tape_3590_ids);
+MODULE_AUTHOR("(C) 2001,2006 IBM Corporation");
+MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver");
+MODULE_LICENSE("GPL");
+
+module_init(tape_3590_init);
+module_exit(tape_3590_exit);
diff --git a/drivers/s390/char/tape_3590.h b/drivers/s390/char/tape_3590.h
new file mode 100644 (file)
index 0000000..cf274b9
--- /dev/null
@@ -0,0 +1,124 @@
+/*
+ *  drivers/s390/char/tape_3590.h
+ *    tape device discipline for 3590 tapes.
+ *
+ *    Copyright (C) IBM Corp. 2001,2006
+ *    Author(s): Stefan Bader <shbader@de.ibm.com>
+ *              Michael Holzheu <holzheu@de.ibm.com>
+ *              Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+
+#ifndef _TAPE_3590_H
+#define _TAPE_3590_H
+
+#define MEDIUM_SENSE   0xc2
+#define READ_PREVIOUS  0x0a
+#define MODE_SENSE     0xcf
+#define PERFORM_SS_FUNC 0x77
+#define READ_SS_DATA   0x3e
+
+#define PREP_RD_SS_DATA 0x18
+#define RD_ATTMSG      0x3
+
+#define SENSE_BRA_PER  0
+#define SENSE_BRA_CONT 1
+#define SENSE_BRA_RE   2
+#define SENSE_BRA_DRE  3
+
+#define SENSE_FMT_LIBRARY      0x23
+#define SENSE_FMT_UNSOLICITED  0x40
+#define SENSE_FMT_COMMAND_REJ  0x41
+#define SENSE_FMT_COMMAND_EXEC0 0x50
+#define SENSE_FMT_COMMAND_EXEC1 0x51
+#define SENSE_FMT_EVENT0       0x60
+#define SENSE_FMT_EVENT1       0x61
+#define SENSE_FMT_MIM          0x70
+#define SENSE_FMT_SIM          0x71
+
+#define MSENSE_UNASSOCIATED     0x00
+#define MSENSE_ASSOCIATED_MOUNT         0x01
+#define MSENSE_ASSOCIATED_UMOUNT 0x02
+
+#define TAPE_3590_MAX_MSG       0xb0
+
+/* Datatypes */
+
+struct tape_3590_disc_data {
+       unsigned char modeset_byte;
+       int read_back_op;
+};
+
+struct tape_3590_sense {
+
+       unsigned int command_rej:1;
+       unsigned int interv_req:1;
+       unsigned int bus_out_check:1;
+       unsigned int eq_check:1;
+       unsigned int data_check:1;
+       unsigned int overrun:1;
+       unsigned int def_unit_check:1;
+       unsigned int assgnd_elsew:1;
+
+       unsigned int locate_fail:1;
+       unsigned int inst_online:1;
+       unsigned int reserved:1;
+       unsigned int blk_seq_err:1;
+       unsigned int begin_part:1;
+       unsigned int wr_mode:1;
+       unsigned int wr_prot:1;
+       unsigned int not_cap:1;
+
+       unsigned int bra:2;
+       unsigned int lc:3;
+       unsigned int vlf_active:1;
+       unsigned int stm:1;
+       unsigned int med_pos:1;
+
+       unsigned int rac:8;
+
+       unsigned int rc_rqc:16;
+
+       unsigned int mc:8;
+
+       unsigned int sense_fmt:8;
+
+       union {
+               struct {
+                       unsigned int emc:4;
+                       unsigned int smc:4;
+                       unsigned int sev:2;
+                       unsigned int reserved:6;
+                       unsigned int md:8;
+                       unsigned int refcode:8;
+                       unsigned int mid:16;
+                       unsigned int mp:16;
+                       unsigned char volid[6];
+                       unsigned int fid:8;
+               } f70;
+               struct {
+                       unsigned int emc:4;
+                       unsigned int smc:4;
+                       unsigned int sev:2;
+                       unsigned int reserved1:5;
+                       unsigned int mdf:1;
+                       unsigned char md[3];
+                       unsigned int simid:8;
+                       unsigned int uid:16;
+                       unsigned int refcode1:16;
+                       unsigned int refcode2:16;
+                       unsigned int refcode3:16;
+                       unsigned int reserved2:8;
+               } f71;
+               unsigned char data[14];
+       } fmt;
+       unsigned char pad[10];
+
+} __attribute__ ((packed));
+
+struct tape_3590_med_sense {
+       unsigned int macst:4;
+       unsigned int masst:4;
+       char pad[127];
+} __attribute__ ((packed));
+
+#endif /* _TAPE_3590_H */
index 3ab6aafb7343c2a3c56e5a81f230f3a7ea087263..2d311798edf4d28b70345ff8ee1ab826f6f1585a 100644 (file)
@@ -1,9 +1,8 @@
 /*
- *  drivers/s390/char/tape_34xx.h
+ *  drivers/s390/char/tape_std.h
  *    standard tape device functions for ibm tapes.
  *
- *  S390 and zSeries version
- *    Copyright (C) 2001,2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Copyright (C) IBM Corp. 2001,2006
  *    Author(s): Carsten Otte <cotte@de.ibm.com>
  *              Tuan Ngo-Anh <ngoanh@de.ibm.com>
  *              Martin Schwidefsky <schwidefsky@de.ibm.com>
@@ -149,4 +148,11 @@ void tape_std_error_recovery_do_retry(struct tape_device *);
 void tape_std_error_recovery_read_opposite(struct tape_device *);
 void tape_std_error_recovery_HWBUG(struct tape_device *, int condno);
 
+/* S390 tape types */
+enum s390_tape_type {
+        tape_3480,
+        tape_3490,
+        tape_3590,
+};
+
 #endif // _TAPE_STD_H