--- /dev/null
+/*
+ * 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);
projects / mirror_ubuntu-zesty-kernel.git / commitdiff