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linux/drivers/s390/char/tape_3590.c

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/*
* 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).
*/
struct work_handler_data {
struct tape_device *device;
enum tape_op op;
struct work_struct work;
};
static void
tape_3590_work_handler(void *data)
{
struct work_handler_data *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 work_handler_data *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 = page_address(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)
{
flush_scheduled_work();
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},
{CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592},
{ /* 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);
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