tape34xx.c
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上传日期:2013-02-24
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文件大小:69k
- /***************************************************************************
- *
- * drivers/s390/char/tape34xx.c
- * common tape device discipline for 34xx tapes.
- *
- * S390 and zSeries version
- * Copyright (C) 2001 IBM Corporation
- * Author(s): Carsten Otte <cotte@de.ibm.com>
- * Tuan Ngo-Anh <ngoanh@de.ibm.com>
- *
- ****************************************************************************
- */
- #include "tapedefs.h"
- #include <linux/config.h>
- #include <linux/version.h>
- #include <linux/stddef.h>
- #include <linux/kernel.h>
- #include <asm/types.h>
- #include <asm/uaccess.h>
- #include <linux/stat.h>
- #include <linux/proc_fs.h>
- #include <asm/ccwcache.h>
- #include <asm/idals.h>
- #ifdef CONFIG_S390_TAPE_DYNAMIC
- #include <asm/s390dyn.h>
- #endif
- #include <asm/debug.h>
- #include <linux/compatmac.h>
- #include "tape.h"
- #include "tape34xx.h"
- #define PRINTK_HEADER "T34xx:"
- tape_event_handler_t tape34xx_event_handler_table[TS_SIZE][TE_SIZE] =
- {
- /* {START , DONE, FAILED, ERROR, OTHER } */
- {NULL, tape34xx_unused_done, NULL, NULL, NULL}, /* TS_UNUSED */
- {NULL, tape34xx_idle_done, NULL, NULL, NULL}, /* TS_IDLE */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_DONE */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_FAILED */
- {NULL, tape34xx_block_done, NULL, NULL, NULL}, /* TS_BLOCK_INIT */
- {NULL, tape34xx_bsb_init_done, NULL, NULL, NULL}, /* TS_BSB_INIT */
- {NULL, tape34xx_bsf_init_done, NULL, NULL, NULL}, /* TS_BSF_INIT */
- {NULL, tape34xx_dse_init_done, NULL, NULL, NULL}, /* TS_DSE_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_EGA_INIT */
- {NULL, tape34xx_fsb_init_done, NULL, NULL, NULL}, /* TS_FSB_INIT */
- {NULL, tape34xx_fsf_init_done, NULL, NULL, NULL}, /* TS_FSF_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_LDI_INIT */
- {NULL, tape34xx_lbl_init_done, NULL, NULL, NULL}, /* TS_LBL_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_MSE_INIT */
- {NULL, tape34xx_nop_init_done, NULL, NULL, NULL}, /* TS_NOP_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_RBA_INIT */
- {NULL, tape34xx_rbi_init_done, NULL, NULL, NULL}, /* TS_RBI_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_RBU_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_RBL_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_RDC_INIT */
- {NULL, tape34xx_rfo_init_done, NULL, NULL, NULL}, /* TS_RFO_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_RSD_INIT */
- {NULL, tape34xx_rew_init_done, NULL, NULL, NULL}, /* TS_REW_INIT */
- {NULL, tape34xx_rew_release_init_done, NULL, NULL, NULL}, /* TS_REW_RELEASE_IMIT */
- {NULL, tape34xx_run_init_done, NULL, NULL, NULL}, /* TS_RUN_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_SEN_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_SID_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_SNP_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_SPG_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_SWI_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_SMR_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_SYN_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_TIO_INIT */
- {NULL, NULL, NULL, NULL, NULL}, /* TS_UNA_INIT */
- {NULL, tape34xx_wri_init_done, NULL, NULL, NULL}, /* TS_WRI_INIT */
- {NULL, tape34xx_wtm_init_done, NULL, NULL, NULL}, /* TS_WTM_INIT */
- {NULL, NULL, NULL, NULL, NULL}}; /* TS_NOT_OPER */
- int
- tape34xx_ioctl_overload (struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg)
- {
- return -EINVAL; // no additional ioctls
- }
- ccw_req_t *
- tape34xx_write_block (const char *data, size_t count, tape_info_t * ti)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- void *mem;
- cqr = tape_alloc_ccw_req (ti, 2, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xwbl nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- mem = kmalloc (count, GFP_KERNEL);
- if (!mem) {
- tape_free_request (cqr);
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xwbl nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- if (copy_from_user (mem, data, count)) {
- kfree (mem);
- tape_free_request (cqr);
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xwbl segf.");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = WRITE_CMD;
- ccw->flags = 0;
- ccw->count = count;
- set_normalized_cda (ccw, (unsigned long) mem);
- if ((ccw->cda) == 0) {
- kfree (mem);
- tape_free_request (cqr);
- return NULL;
- }
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = mem;
- ti->userbuf = (void *) data;
- tapestate_set (ti, TS_WRI_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xwbl ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- void
- tape34xx_free_write_block (ccw_req_t * cqr, tape_info_t * ti)
- {
- unsigned long lockflags;
- ccw1_t *ccw;
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ccw = cqr->cpaddr;
- ccw++;
- clear_normalized_cda (ccw);
- kfree (ti->kernbuf);
- tape_free_request (cqr);
- ti->kernbuf = ti->userbuf = NULL;
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xfwb free");
- #endif /* TAPE_DEBUG */
- }
- ccw_req_t *
- tape34xx_read_block (const char *data, size_t count, tape_info_t * ti)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- void *mem;
- cqr = tape_alloc_ccw_req (ti, 2, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xrbl nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- mem = kmalloc (count, GFP_KERNEL);
- if (!mem) {
- tape_free_request (cqr);
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xrbl nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = READ_FORWARD;
- ccw->flags = 0;
- ccw->count = count;
- set_normalized_cda (ccw, (unsigned long) mem);
- if ((ccw->cda) == 0) {
- kfree (mem);
- tape_free_request (cqr);
- return NULL;
- }
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = mem;
- ti->userbuf = (void *) data;
- tapestate_set (ti, TS_RFO_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xrbl ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- ccw_req_t *
- tape34xx_read_opposite (tape_info_t * ti,int novalue)
- {
- ccw_req_t *cqr;
- ccw1_t *ccw;
- size_t count;
- // first, retrieve the count from the old cqr.
- cqr = ti->cqr;
- ccw = cqr->cpaddr;
- ccw++;
- count=ccw->count;
- // free old cqr.
- clear_normalized_cda (ccw);
- tape_free_request (cqr);
- // build new cqr
- cqr = tape_alloc_ccw_req (ti, 3, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xrop nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = READ_BACKWARD;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = count;
- set_normalized_cda (ccw, (unsigned long) ti->kernbuf);
- if ((ccw->cda) == 0) {
- tape_free_request (cqr);
- return NULL;
- }
- ccw++;
- ccw->cmd_code = FORSPACEBLOCK;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- ccw->cda = (unsigned long)ccw;
- ccw++;
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 1;
- ccw->cda = (unsigned long)ccw;
- tapestate_set (ti, TS_RBA_INIT);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xrop ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- void
- tape34xx_free_read_block (ccw_req_t * cqr, tape_info_t * ti)
- {
- unsigned long lockflags;
- size_t cpysize;
- ccw1_t *ccw;
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ccw = cqr->cpaddr;
- ccw++;
- cpysize = ccw->count - ti->devstat.rescnt;
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- if (copy_to_user (ti->userbuf, ti->kernbuf, cpysize)) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xfrb segf.");
- #endif /* TAPE_DEBUG */
- }
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- clear_normalized_cda (ccw);
- kfree (ti->kernbuf);
- tape_free_request (cqr);
- ti->kernbuf = ti->userbuf = NULL;
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xfrb free");
- #endif /* TAPE_DEBUG */
- }
- /*
- * The IOCTL interface is implemented in the following section,
- * excepted the MTRESET, MTSETBLK which are handled by tapechar.c
- */
- /*
- * MTFSF: Forward space over 'count' file marks. The tape is positioned
- * at the EOT (End of Tape) side of the file mark.
- */
- ccw_req_t *
- tape34xx_mtfsf (tape_info_t * ti, int count)
- {
- long lockflags;
- int i;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- if ((count == 0) || (count > 510)) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xfsf parm");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- cqr = tape_alloc_ccw_req (ti, 2 + count, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xfsf nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- for (i = 0; i < count; i++) {
- ccw->cmd_code = FORSPACEFILE;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- }
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_FSF_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xfsf ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTBSF: Backward space over 'count' file marks. The tape is positioned at
- * the EOT (End of Tape) side of the last skipped file mark.
- */
- ccw_req_t *
- tape34xx_mtbsf (tape_info_t * ti, int count)
- {
- long lockflags;
- int i;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- if ((count == 0) || (count > 510)) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xbsf parm");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- cqr = tape_alloc_ccw_req (ti, 2 + count, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xbsf nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- for (i = 0; i < count; i++) {
- ccw->cmd_code = BACKSPACEFILE;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- }
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_BSF_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xbsf ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTFSR: Forward space over 'count' tape blocks (blocksize is set
- * via MTSETBLK.
- */
- ccw_req_t *
- tape34xx_mtfsr (tape_info_t * ti, int count)
- {
- long lockflags;
- int i;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- if ((count == 0) || (count > 510)) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xfsr parm");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- cqr = tape_alloc_ccw_req (ti, 2 + count, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xfsr nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- for (i = 0; i < count; i++) {
- ccw->cmd_code = FORSPACEBLOCK;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- }
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_FSB_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xfsr ccwgen");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTBSR: Backward space over 'count' tape blocks.
- * (blocksize is set via MTSETBLK.
- */
- ccw_req_t *
- tape34xx_mtbsr (tape_info_t * ti, int count)
- {
- long lockflags;
- int i;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- if ((count == 0) || (count > 510)) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xbsr parm");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- cqr = tape_alloc_ccw_req (ti, 2 + count, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xbsr nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- for (i = 0; i < count; i++) {
- ccw->cmd_code = BACKSPACEBLOCK;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- }
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_BSB_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xbsr ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTWEOF: Write 'count' file marks at the current position.
- */
- ccw_req_t *
- tape34xx_mtweof (tape_info_t * ti, int count)
- {
- long lockflags;
- int i;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- if ((count == 0) || (count > 510)) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xweo parm");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- cqr = tape_alloc_ccw_req (ti, 2 + count, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xweo nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- for (i = 0; i < count; i++) {
- ccw->cmd_code = WRITETAPEMARK;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- }
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_WTM_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xweo ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTREW: Rewind the tape.
- */
- ccw_req_t *
- tape34xx_mtrew (tape_info_t * ti, int count)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- cqr = tape_alloc_ccw_req (ti, 3, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xrew nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = REWIND;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_REW_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xrew ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTOFFL: Rewind the tape and put the drive off-line.
- * Implement 'rewind unload'
- */
- ccw_req_t *
- tape34xx_mtoffl (tape_info_t * ti, int count)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- cqr = tape_alloc_ccw_req (ti, 3, 32);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xoff nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = REWIND_UNLOAD;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- ccw->cmd_code = SENSE;
- ccw->flags = 0;
- ccw->count = 32;
- ccw->cda = (unsigned long) cqr->cpaddr;
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_RUN_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xoff ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTNOP: 'No operation'.
- */
- ccw_req_t *
- tape34xx_mtnop (tape_info_t * ti, int count)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- cqr = tape_alloc_ccw_req (ti, 1, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xnop nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) ccw->cmd_code;
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_NOP_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xnop ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTBSFM: Backward space over 'count' file marks.
- * The tape is positioned at the BOT (Begin Of Tape) side of the
- * last skipped file mark.
- */
- ccw_req_t *
- tape34xx_mtbsfm (tape_info_t * ti, int count)
- {
- long lockflags;
- int i;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- if ((count == 0) || (count > 510)) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xbsm parm");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- cqr = tape_alloc_ccw_req (ti, 2 + count, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xbsm nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- for (i = 0; i < count; i++) {
- ccw->cmd_code = BACKSPACEFILE;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- }
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_BSF_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xbsm ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTFSFM: Forward space over 'count' file marks.
- * The tape is positioned at the BOT (Begin Of Tape) side
- * of the last skipped file mark.
- */
- ccw_req_t *
- tape34xx_mtfsfm (tape_info_t * ti, int count)
- {
- long lockflags;
- int i;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- if ((count == 0) || (count > 510)) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xfsm parm");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- cqr = tape_alloc_ccw_req (ti, 2 + count, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xfsm nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- for (i = 0; i < count; i++) {
- ccw->cmd_code = FORSPACEFILE;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- }
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_FSF_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xfsm ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTEOM: positions at the end of the portion of the tape already used
- * for recordind data. MTEOM positions after the last file mark, ready for
- * appending another file.
- * MTRETEN: Retension the tape, i.e. forward space to end of tape and rewind.
- */
- ccw_req_t *
- tape34xx_mteom (tape_info_t * ti, int count)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- cqr = tape_alloc_ccw_req (ti, 4, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xeom nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = FORSPACEFILE;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- ccw->cmd_code = NOP;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- ccw->cmd_code = CCW_CMD_TIC;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (cqr->cpaddr);
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_FSF_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xeom ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTERASE: erases the tape.
- */
- ccw_req_t *
- tape34xx_mterase (tape_info_t * ti, int count)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- cqr = tape_alloc_ccw_req (ti, 5, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xera nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = REWIND;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- ccw->cmd_code = ERASE_GAP;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- ccw->cmd_code = DATA_SEC_ERASE;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_DSE_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xera ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTSETDENSITY: set tape density.
- */
- ccw_req_t *
- tape34xx_mtsetdensity (tape_info_t * ti, int count)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- cqr = tape_alloc_ccw_req (ti, 2, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xden nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_NOP_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xden ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTSEEK: seek to the specified block.
- */
- ccw_req_t *
- tape34xx_mtseek (tape_info_t * ti, int count)
- {
- long lockflags;
- __u8 *data;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- if ((data = kmalloc (4 * sizeof (__u8), GFP_KERNEL)) == NULL) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xsee nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- data[0] = 0x01;
- data[1] = data[2] = data[3] = 0x00;
- if (count >= 4194304) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xsee parm");
- #endif /* TAPE_DEBUG */
- kfree(data);
- return NULL;
- }
- if (((tape34xx_disc_data_t *) ti->discdata)->modeset_byte & 0x08) // IDRC on
- data[1] = data[1] | 0x80;
- data[3] += count % 256;
- data[2] += (count / 256) % 256;
- data[1] += (count / 65536);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xsee id:");
- debug_int_event (tape_debug_area,6,count);
- #endif /* TAPE_DEBUG */
- cqr = tape_alloc_ccw_req (ti, 3, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xsee nomem");
- #endif /* TAPE_DEBUG */
- kfree (data);
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = LOCATE;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 4;
- set_normalized_cda (ccw, (unsigned long) data);
- ccw++;
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = data;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_LBL_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xsee ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTTELL: Tell block. Return the number of block relative to current file.
- */
- ccw_req_t *
- tape34xx_mttell (tape_info_t * ti, int count)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- void *mem;
- cqr = tape_alloc_ccw_req (ti, 2, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xtel nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- mem = kmalloc (8, GFP_KERNEL);
- if (!mem) {
- tape_free_request (cqr);
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xtel nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = READ_BLOCK_ID;
- ccw->flags = 0;
- ccw->count = 8;
- set_normalized_cda (ccw, (unsigned long) mem);
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = mem;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_RBI_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xtel ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTSETDRVBUFFER: Set the tape drive buffer code to number.
- * Implement NOP.
- */
- ccw_req_t *
- tape34xx_mtsetdrvbuffer (tape_info_t * ti, int count)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- cqr = tape_alloc_ccw_req (ti, 2, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xbuf nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_NOP_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xbuf ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTLOCK: Locks the tape drive door.
- * Implement NOP CCW command.
- */
- ccw_req_t *
- tape34xx_mtlock (tape_info_t * ti, int count)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- cqr = tape_alloc_ccw_req (ti, 2, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xloc nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_NOP_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xloc ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTUNLOCK: Unlocks the tape drive door.
- * Implement the NOP CCW command.
- */
- ccw_req_t *
- tape34xx_mtunlock (tape_info_t * ti, int count)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- cqr = tape_alloc_ccw_req (ti, 2, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xulk nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_NOP_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xulk ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTLOAD: Loads the tape.
- * This function is not implemented and returns NULL, which causes the Frontend to wait for a medium being loaded.
- * The 3480/3490 type Tapes do not support a load command
- */
- ccw_req_t *
- tape34xx_mtload (tape_info_t * ti, int count)
- {
- return NULL;
- }
- /*
- * MTUNLOAD: Rewind the tape and unload it.
- */
- ccw_req_t *
- tape34xx_mtunload (tape_info_t * ti, int count)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- cqr = tape_alloc_ccw_req (ti, 3, 32);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xunl nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = REWIND_UNLOAD;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ccw++;
- ccw->cmd_code = SENSE;
- ccw->flags = 0;
- ccw->count = 32;
- ccw->cda = (unsigned long) cqr->cpaddr;
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_RUN_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xunl ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTCOMPRESSION: used to enable compression.
- * Sets the IDRC on/off.
- */
- ccw_req_t *
- tape34xx_mtcompression (tape_info_t * ti, int count)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- if ((count < 0) || (count > 1)) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xcom parm");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- if (count == 0)
- ((tape34xx_disc_data_t *) ti->discdata)->modeset_byte = 0x00; // IDRC off
- else
- ((tape34xx_disc_data_t *) ti->discdata)->modeset_byte = 0x08; // IDRC on
- cqr = tape_alloc_ccw_req (ti, 2, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xcom nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_NOP_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xcom ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTSTPART: Move the tape head at the partition with the number 'count'.
- * Implement the NOP CCW command.
- */
- ccw_req_t *
- tape34xx_mtsetpart (tape_info_t * ti, int count)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- cqr = tape_alloc_ccw_req (ti, 2, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xspa nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_NOP_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xspa ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTMKPART: .... dummy .
- * Implement the NOP CCW command.
- */
- ccw_req_t *
- tape34xx_mtmkpart (tape_info_t * ti, int count)
- {
- long lockflags;
- ccw_req_t *cqr;
- ccw1_t *ccw;
- cqr = tape_alloc_ccw_req (ti, 2, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xnpa nomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- ccw++;
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
- ti->kernbuf = NULL;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_NOP_INIT);
- s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xnpa ccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- /*
- * MTIOCGET: query the tape drive status.
- */
- ccw_req_t *
- tape34xx_mtiocget (tape_info_t * ti, int count)
- {
- return NULL;
- }
- /*
- * MTIOCPOS: query the tape position.
- */
- ccw_req_t *
- tape34xx_mtiocpos (tape_info_t * ti, int count)
- {
- return NULL;
- }
- ccw_req_t * tape34xx_bread (struct request *req,tape_info_t* ti,int tapeblock_major) {
- ccw_req_t *cqr;
- ccw1_t *ccw;
- __u8 *data;
- int s2b = blksize_size[tapeblock_major][ti->blk_minor]/hardsect_size[tapeblock_major][ti->blk_minor];
- int realcount;
- int size,bhct = 0;
- struct buffer_head* bh;
- for (bh = req->bh; bh; bh = bh->b_reqnext) {
- if (bh->b_size > blksize_size[tapeblock_major][ti->blk_minor])
- for (size = 0; size < bh->b_size; size += blksize_size[tapeblock_major][ti->blk_minor])
- bhct++;
- else
- bhct++;
- }
- if ((data = kmalloc (4 * sizeof (__u8), GFP_ATOMIC)) == NULL) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,3,"xBREDnomem");
- #endif /* TAPE_DEBUG */
- return NULL;
- }
- data[0] = 0x01;
- data[1] = data[2] = data[3] = 0x00;
- realcount=req->sector/s2b;
- if (((tape34xx_disc_data_t *) ti->discdata)->modeset_byte & 0x08) // IDRC on
- data[1] = data[1] | 0x80;
- data[3] += realcount % 256;
- data[2] += (realcount / 256) % 256;
- data[1] += (realcount / 65536);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xBREDid:");
- debug_int_event (tape_debug_area,6,realcount);
- #endif /* TAPE_DEBUG */
- cqr = tape_alloc_ccw_req (ti, 2+bhct+1, 0);
- if (!cqr) {
- #ifdef TAPE_DEBUG
- debug_text_exception (tape_debug_area,6,"xBREDnomem");
- #endif /* TAPE_DEBUG */
- kfree(data);
- return NULL;
- }
- ccw = cqr->cpaddr;
- ccw->cmd_code = MODE_SET_DB;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 1;
- set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
- if (realcount!=ti->position) {
- ccw++;
- ccw->cmd_code = LOCATE;
- ccw->flags = CCW_FLAG_CC;
- ccw->count = 4;
- set_normalized_cda (ccw, (unsigned long) data);
- }
- ti->position=realcount+req->nr_sectors/s2b;
- for (bh=req->bh;bh!=NULL;) {
- ccw->flags = CCW_FLAG_CC;
- if (bh->b_size >= blksize_size[tapeblock_major][ti->blk_minor]) {
- for (size = 0; size < bh->b_size; size += blksize_size[tapeblock_major][ti->blk_minor]) {
- ccw++;
- ccw->flags = CCW_FLAG_CC;
- ccw->cmd_code = READ_FORWARD;
- ccw->count = blksize_size[tapeblock_major][ti->blk_minor];
- set_normalized_cda (ccw, __pa (bh->b_data + size));
- }
- bh = bh->b_reqnext;
- } else { /* group N bhs to fit into byt_per_blk */
- for (size = 0; bh != NULL && size < blksize_size[tapeblock_major][ti->blk_minor];) {
- ccw++;
- ccw->flags = CCW_FLAG_DC;
- ccw->cmd_code = READ_FORWARD;
- ccw->count = bh->b_size;
- set_normalized_cda (ccw, __pa (bh->b_data));
- size += bh->b_size;
- bh = bh->b_reqnext;
- }
- if (size != blksize_size[tapeblock_major][ti->blk_minor]) {
- PRINT_WARN ("Cannot fulfill small request %d vs. %d (%ld sects)n",
- size,
- blksize_size[tapeblock_major][ti->blk_minor],
- req->nr_sectors);
- kfree(data);
- tape_free_request (cqr);
- return NULL;
- }
- }
- }
- ccw -> flags &= ~(CCW_FLAG_DC);
- ccw -> flags |= (CCW_FLAG_CC);
- ccw++;
- ccw->cmd_code = NOP;
- ccw->flags = 0;
- ccw->count = 0;
- ccw->cda = (unsigned long) (&(ccw->cmd_code));
- ti->kernbuf = data;
- ti->userbuf = NULL;
- tapestate_set (ti, TS_BLOCK_INIT);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xBREDccwg");
- #endif /* TAPE_DEBUG */
- return cqr;
- }
- void tape34xx_free_bread (ccw_req_t* cqr,struct _tape_info_t* ti) {
- ccw1_t* ccw;
- for (ccw=(ccw1_t*)cqr->cpaddr;(ccw->flags & CCW_FLAG_CC)||(ccw->flags & CCW_FLAG_DC);ccw++)
- if ((ccw->cmd_code == MODE_SET_DB) ||
- (ccw->cmd_code == LOCATE) ||
- (ccw->cmd_code == READ_FORWARD))
- clear_normalized_cda(ccw);
- tape_free_request(cqr);
- kfree(ti->kernbuf);
- ti->kernbuf=NULL;
- }
- /* event handlers */
- void
- tape34xx_default_handler (tape_info_t * ti)
- {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xdefhandle");
- #endif /* TAPE_DEBUG */
- PRINT_ERR ("TAPE34XX: An unexpected Unit Check occurred.n");
- PRINT_ERR ("TAPE34XX: Please read Documentation/s390/TAPE and report it!n");
- PRINT_ERR ("TAPE34XX: Current state is: %s",
- (((tapestate_get (ti) < TS_SIZE) && (tapestate_get (ti) >= 0)) ?
- state_verbose[tapestate_get (ti)] : "->UNKNOWN STATE<-"));
- tape_dump_sense (&ti->devstat);
- ti->rc = -EIO;
- ti->wanna_wakeup=1;
- switch (tapestate_get(ti)) {
- case TS_REW_RELEASE_INIT:
- tapestate_set(ti,TS_FAILED);
- wake_up (&ti->wq);
- break;
- case TS_BLOCK_INIT:
- tapestate_set(ti,TS_FAILED);
- schedule_tapeblock_exec_IO(ti);
- break;
- default:
- tapestate_set(ti,TS_FAILED);
- wake_up_interruptible (&ti->wq);
- }
- }
- void
- tape34xx_unexpect_uchk_handler (tape_info_t * ti)
- {
- if ((ti->devstat.ii.sense.data[0] == 0x40) &&
- (ti->devstat.ii.sense.data[1] == 0x40) &&
- (ti->devstat.ii.sense.data[3] == 0x43)) {
- // no tape in the drive
- PRINT_INFO ("Drive %d not ready. No volume loaded.n", ti->rew_minor / 2);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,3,"xuuh nomed");
- #endif /* TAPE_DEBUG */
- tapestate_set (ti, TS_FAILED);
- ti->rc = -ENOMEDIUM;
- ti->wanna_wakeup=1;
- wake_up_interruptible (&ti->wq);
- } else if ((ti->devstat.ii.sense.data[0] == 0x42) &&
- (ti->devstat.ii.sense.data[1] == 0x44) &&
- (ti->devstat.ii.sense.data[3] == 0x3b)) {
- PRINT_INFO ("Media in drive %d was changed!n",
- ti->rew_minor / 2);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,3,"xuuh medchg");
- #endif
- /* nothing to do. chan end & dev end will be reported when io is finished */
- } else {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,3,"xuuh unexp");
- debug_text_event (tape_debug_area,3,"state:");
- debug_text_event (tape_debug_area,3,((tapestate_get (ti) < TS_SIZE) &&
- (tapestate_get (ti) >= 0)) ?
- state_verbose[tapestate_get (ti)] :
- "TS UNKNOWN");
- #endif /* TAPE_DEBUG */
- tape34xx_default_handler (ti);
- }
- }
- void
- tape34xx_unused_done (tape_info_t * ti)
- {
- if (ti->medium_is_unloaded) {
- // A medium was inserted in the drive!
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xuui med");
- #endif /* TAPE_DEBUG */
- PRINT_WARN ("A medium was inserted into the tape.n");
- ti->medium_is_unloaded=0;
- } else {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,3,"unsol.irq!");
- debug_text_event (tape_debug_area,3,"dev end");
- debug_int_exception (tape_debug_area,3,ti->devinfo.irq);
- #endif /* TAPE_DEBUG */
- PRINT_WARN ("Unsolicited IRQ (Device End) caught in unused state.n");
- tape_dump_sense (&ti->devstat);
- }
- }
- void
- tape34xx_idle_done (tape_info_t * ti)
- {
- if (ti->medium_is_unloaded) {
- // A medium was inserted in the drive!
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"xuud med");
- #endif /* TAPE_DEBUG */
- PRINT_WARN ("A medium was inserted into the tape.n");
- ti->medium_is_unloaded=0;
- wake_up_interruptible (&ti->wq);
- } else {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,3,"unsol.irq!");
- debug_text_event (tape_debug_area,3,"dev end");
- debug_int_exception (tape_debug_area,3,ti->devinfo.irq);
- #endif /* TAPE_DEBUG */
- PRINT_WARN ("Unsolicited IRQ (Device End) caught in idle state.n");
- tape_dump_sense (&ti->devstat);
- }
- }
- void
- tape34xx_block_done (tape_info_t * ti)
- {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"x:bREQdone");
- #endif /* TAPE_DEBUG */
- tapestate_set(ti,TS_DONE);
- schedule_tapeblock_exec_IO(ti);
- }
- void
- tape34xx_bsf_init_done (tape_info_t * ti)
- {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"bsf done");
- #endif
- tapestate_set (ti, TS_DONE);
- ti->rc = 0;
- ti->wanna_wakeup=1;
- wake_up_interruptible (&ti->wq);
- }
- void
- tape34xx_dse_init_done (tape_info_t * ti)
- {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"dse done");
- #endif
- tapestate_set (ti, TS_DONE);
- ti->rc = 0;
- ti->wanna_wakeup=1;
- wake_up_interruptible (&ti->wq);
- }
- void
- tape34xx_fsf_init_done (tape_info_t * ti)
- {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"fsf done");
- #endif
- tapestate_set (ti, TS_DONE);
- ti->rc = 0;
- ti->wanna_wakeup=1;
- wake_up_interruptible (&ti->wq);
- }
- void
- tape34xx_fsb_init_done (tape_info_t * ti)
- {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"fsb done");
- #endif
- tapestate_set (ti, TS_DONE);
- ti->rc = 0;
- ti->wanna_wakeup=1;
- wake_up_interruptible (&ti->wq);
- }
- void
- tape34xx_bsb_init_done (tape_info_t * ti)
- {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"bsb done");
- #endif
- tapestate_set (ti, TS_DONE);
- ti->rc = 0;
- ti->wanna_wakeup=1;
- wake_up (&ti->wq);
- }
- void
- tape34xx_lbl_init_done (tape_info_t * ti)
- {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"lbl done");
- #endif
- tapestate_set (ti, TS_DONE);
- ti->rc = 0;
- //s390irq_spin_unlock(tape->devinfo.irq);
- ti->wanna_wakeup=1;
- wake_up (&ti->wq);
- }
- void
- tape34xx_nop_init_done (tape_info_t * ti)
- {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"nop done..");
- debug_text_exception (tape_debug_area,6,"or rew/rel");
- #endif
- tapestate_set (ti, TS_DONE);
- ti->rc = 0;
- //s390irq_spin_unlock(tape->devinfo.irq);
- ti->wanna_wakeup=1;
- wake_up (&ti->wq);
- }
- void
- tape34xx_rfo_init_done (tape_info_t * ti)
- {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"rfo done");
- #endif
- tapestate_set (ti, TS_DONE);
- ti->rc = 0;
- ti->wanna_wakeup=1;
- wake_up (&ti->wq);
- }
- void
- tape34xx_rbi_init_done (tape_info_t * ti)
- {
- __u8 *data;
- #ifdef TAPE_DEBUG
- int i;
- #endif
- tapestate_set (ti, TS_FAILED);
- data = ti->kernbuf;
- ti->rc = data[3];
- ti->rc += 256 * data[2];
- ti->rc += 65536 * (data[1] & 0x3F);
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"rbi done");
- debug_text_event (tape_debug_area,6,"data:");
- for (i=0;i<8;i++)
- debug_int_event (tape_debug_area,6,data[i]);
- #endif
- ti->wanna_wakeup=1;
- wake_up_interruptible (&ti->wq);
- }
- void
- tape34xx_rew_init_done (tape_info_t * ti)
- {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"rew done");
- #endif
- //BH: use irqsave
- //s390irq_spin_lock(tape->devinfo.irq);
- tapestate_set (ti, TS_DONE);
- ti->rc = 0;
- //s390irq_spin_unlock(tape->devinfo.irq);
- ti->wanna_wakeup=1;
- wake_up_interruptible (&ti->wq);
- }
- void
- tape34xx_rew_release_init_done (tape_info_t * ti)
- {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"rewR done");
- #endif
- tapestate_set (ti, TS_DONE);
- ti->rc = 0;
- //s390irq_spin_unlock(tape->devinfo.irq);
- ti->wanna_wakeup=1;
- wake_up (&ti->wq);
- }
- void
- tape34xx_run_init_done (tape_info_t * ti)
- {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"rew done");
- #endif
- tapestate_set (ti, TS_DONE);
- ti->rc = 0;
- ti->wanna_wakeup=1;
- wake_up_interruptible (&ti->wq);
- }
- void
- tape34xx_wri_init_done (tape_info_t * ti)
- {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,6,"wri done");
- #endif
- //BH: use irqsave
- //s390irq_spin_lock(ti->devinfo.irq);
- tapestate_set (ti, TS_DONE);
- ti->rc = 0;
- //s390irq_spin_unlock(ti->devinfo.irq);
- ti->wanna_wakeup=1;
- wake_up_interruptible (&ti->wq);
- }
- void
- tape34xx_wtm_init_done (tape_info_t * ti)
- {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,3,"wtm done");
- #endif
- tapestate_set (ti, TS_DONE);
- ti->rc = 0;
- ti->wanna_wakeup=1;
- wake_up_interruptible (&ti->wq);
- }
- /* This function analyses the tape's sense-data in case of a unit-check. If possible,
- it tries to recover from the error. Else the user is informed about the problem. */
- void
- tape34xx_error_recovery (tape_info_t* ti)
- {
- __u8* sense=ti->devstat.ii.sense.data;
- int inhibit_cu_recovery=0;
- int cu_type=ti->discipline->cu_type;
- if ((((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)&0x80) inhibit_cu_recovery=1;
- if (tapestate_get(ti)==TS_BLOCK_INIT) {
- // no recovery for block device, bottom half will retry...
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- }
- if (sense[0]&SENSE_COMMAND_REJECT)
- switch (tapestate_get(ti)) {
- case TS_BLOCK_INIT:
- case TS_DSE_INIT:
- case TS_EGA_INIT:
- case TS_WRI_INIT:
- case TS_WTM_INIT:
- if (sense[1]&SENSE_WRITE_PROTECT) {
- // trying to write, but medium is write protected
- tape34xx_error_recovery_has_failed(ti,EACCES);
- return;
- }
- default:
- tape34xx_error_recovery_HWBUG(ti,1);
- return;
- }
- // special cases for various tape-states when reaching end of recorded area
- if (((sense[0]==0x08) || (sense[0]==0x10) || (sense[0]==0x12)) &&
- ((sense[1]==0x40) || (sense[1]==0x0c)))
- switch (tapestate_get(ti)) {
- case TS_FSF_INIT:
- // Trying to seek beyond end of recorded area
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case TS_LBL_INIT:
- // Block could not be located.
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case TS_RFO_INIT:
- // Try to read beyond end of recorded area -> 0 bytes read
- tape34xx_error_recovery_has_failed(ti,0);
- return;
- }
- // Sensing special bits
- if (sense[0]&SENSE_BUS_OUT_CHECK) {
- tape34xx_error_recovery_do_retry(ti);
- return;
- }
- if (sense[0]&SENSE_DATA_CHECK) {
- // hardware failure, damaged tape or improper operating conditions
- switch (sense[3]) {
- case 0x23:
- // a read data check occurred
- if ((sense[2]&SENSE_TAPE_SYNC_MODE) ||
- (inhibit_cu_recovery)) {
- // data check is not permanent, may be recovered.
- // We always use async-mode with cu-recovery, so this should *never* happen.
- tape34xx_error_recovery_HWBUG(ti,2);
- return;
- } else {
- // data check is permanent, CU recovery has failed
- PRINT_WARN("Permanent read error, recovery failed!n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- }
- case 0x25:
- // a write data check occurred
- if ((sense[2]&SENSE_TAPE_SYNC_MODE) ||
- (inhibit_cu_recovery)) {
- // data check is not permanent, may be recovered.
- // We always use async-mode with cu-recovery, so this should *never* happen.
- tape34xx_error_recovery_HWBUG(ti,3);
- return;
- } else {
- // data check is permanent, cu-recovery has failed
- PRINT_WARN("Permanent write error, recovery failed!n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- }
- case 0x26:
- // Data Check (read opposite) occurred. We'll recover this.
- tape34xx_error_recovery_read_opposite(ti);
- return;
- case 0x28:
- // The ID-Mark at the beginning of the tape could not be written. This is fatal, we'll report and exit.
- PRINT_WARN("ID-Mark could not be written. Check your hardware!n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x31:
- // Tape void. Tried to read beyond end of device. We'll report and exit.
- PRINT_WARN("Try to read beyond end of recorded area!n");
- tape34xx_error_recovery_has_failed(ti,ENOSPC);
- return;
- case 0x41:
- // Record sequence error. cu detected incorrect block-id sequence on tape. We'll report and exit.
- PRINT_WARN("Illegal block-id sequence found!n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- default:
- // well, all data checks for 3480 should result in one of the above erpa-codes. if not -> bug
- // On 3490, other data-check conditions do exist.
- if (cu_type==0x3480) {
- tape34xx_error_recovery_HWBUG(ti,4);
- return;
- }
- }
- }
- if (sense[0]&SENSE_OVERRUN) {
- // A data overrun between cu and drive occurred. The channel speed is to slow! We'll report this and exit!
- switch (sense[3]) {
- case 0x40: // overrun error
- PRINT_WARN ("Data overrun error between control-unit and drive. Use a faster channel connection, if possible! n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- default:
- // Overrun bit is set, but erpa does not show overrun error. This is a bug.
- tape34xx_error_recovery_HWBUG(ti,5);
- return;
- }
- }
- if (sense[1]&SENSE_RECORD_SEQUENCE_ERR) {
- switch (sense[3]) {
- case 0x41:
- // Record sequence error. cu detected incorrect block-id sequence on tape. We'll report and exit.
- PRINT_WARN("Illegal block-id sequence found!n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- default:
- // Record sequence error bit is set, but erpa does not show record sequence error. This is a bug.
- tape34xx_error_recovery_HWBUG(ti,6);
- return;
- }
- }
- // Sensing erpa codes
- switch (sense[3]) {
- case 0x00:
- // Everything is fine, but we got a unit check. Report and ignore!
- PRINT_WARN ("Non-error sense was found. Unit-check will be ignored, expect errors...n");
- return;
- case 0x21:
- // Data streaming not operational. Cu switches to interlock mode, we reissue the command.
- PRINT_WARN ("Data streaming not operational. Switching to interlock-mode! n");
- tape34xx_error_recovery_do_retry(ti);
- return;
- case 0x22:
- // Path equipment check. Might be drive adapter error, buffer error on the lower interface, internal path not useable, or error during cartridge load.
- // All of the above are not recoverable
- PRINT_WARN ("A path equipment check occurred. One of the following conditions occurred:n");
- PRINT_WARN ("drive adapter error,buffer error on the lower interface, internal path not useable, error during cartridge load.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x23:
- // Read data check. Should have been be covered earlier -> Bug!
- tape34xx_error_recovery_HWBUG(ti,7);
- return;
- case 0x24:
- // Load display check. Load display was command was issued, but the drive is displaying a drive check message. Can be threated as "device end".
- tape34xx_error_recovery_succeded(ti);
- return;
- case 0x25:
- // Write data check. Should have been covered earlier -> Bug!
- tape34xx_error_recovery_HWBUG(ti,8);
- return;
- case 0x26:
- // Data check (read opposite). Should have been covered earlier -> Bug!
- tape34xx_error_recovery_HWBUG(ti,9);
- return;
- case 0x27:
- // Command reject. May indicate illegal channel program or buffer over/underrun.
- // Since all channel programms are issued by this driver and ought be correct,
- // we assume a over/underrun situaltion and retry the channel program.
- tape34xx_error_recovery_do_retry(ti);
- return;
- case 0x28:
- // Write id mark check. Should have beed covered earlier -> bug!
- tape34xx_error_recovery_HWBUG(ti,10);
- return;
- case 0x29:
- // Function incompatible. Either idrc is on but hardware not capable doing idrc
- // or a perform subsystem func is issued and the cu is not online. Anyway, this
- // cannot be recovered and is an I/O error.
- PRINT_WARN ("Function incompatible. Try to switch off idrc! n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x2a:
- // Unsolicited environmental data. An internal counter overflows, we can ignore
- // this and reissue the cmd.
- tape34xx_error_recovery_do_retry(ti);
- return;
- case 0x2b:
- // Environmental data present. Indicates either unload completed ok or read buffered
- // log command completed ok.
- if (tapestate_get(ti)==TS_RUN_INIT) {
- // Rewind unload completed ok.
- tape34xx_error_recovery_succeded(ti);
- return;
- }
- // Since we do not issue read buffered log commands, this should never occur -> bug.
- tape34xx_error_recovery_HWBUG(ti,11);
- return;
- case 0x2c:
- // Permanent equipment check. cu has tried recovery, but did not succeed. This is an
- // I/O error.
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x2d:
- // Data security erase failure.
- if (tapestate_get(ti)==TS_DSE_INIT) {
- // report an I/O error
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- }
- // Data security erase failure, but no such command issued. This is a bug.
- tape34xx_error_recovery_HWBUG(ti,12);
- return;
- case 0x2e:
- // Not capable. This indicates either that the drive fails reading the format id mark
- // or that that format specified is not supported by the drive. We write a message and
- // return an I/O error.
- PRINT_WARN("Drive not capable processing the tape format!");
- tape34xx_error_recovery_has_failed(ti,EMEDIUMTYPE);
- return;
- case 0x2f:
- // This erpa is reserved. This is a bug.
- tape34xx_error_recovery_HWBUG(ti,13);
- return;
- case 0x30:
- // The medium is write protected, while trying to write on it. We'll report this.
- PRINT_WARN("Medium is write protected!n");
- tape34xx_error_recovery_has_failed(ti,EACCES);
- return;
- case 0x31:
- // Tape void. Should have beed covered ealier -> bug
- tape34xx_error_recovery_HWBUG(ti,14);
- return;
- case 0x32:
- // Tension loss. We cannot recover this, it's an I/O error.
- PRINT_WARN("The drive lost tape tension.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x33:
- // Load Failure. The catridge was not inserted correctly or the tape is not threaded
- // correctly. We cannot recover this, the user has to reload the catridge.
- PRINT_WARN("Cartridge load failure. Reload the cartridge and try again.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x34:
- // Unload failure. The drive cannot maintain tape tension and control tape movement
- // during an unload operation.
- PRINT_WARN("Failure during cartridge unload. Please try manually.n");
- if (tapestate_get(ti)!=TS_RUN_INIT) {
- tape34xx_error_recovery_HWBUG(ti,15);
- return;
- }
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x35:
- // Drive equipment check. One of the following:
- // - cu cannot recover from a drive detected error
- // - a check code message is displayed on drive message/load displays
- // - the cartridge loader does not respond correctly
- // - a failure occurs during an index, load, or unload cycle
- PRINT_WARN("Equipment check! Please check the drive and the cartridge loader.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x36:
- switch (cu_type) {
- case 0x3480:
- // This erpa is reserved for 3480 -> BUG
- tape34xx_error_recovery_HWBUG(ti,16);
- return;
- case 0x3490:
- // End of data. This is a permanent I/O error, which cannot be recovered.
- // A read-type command has reached the end-of-data mark.
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- }
- case 0x37:
- // Tape length error. The tape is shorter than reported in the beginning-of-tape data.
- PRINT_WARN("Tape length error.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x38:
- // Physical end of tape. A read/write operation reached the physical end of tape.
- if (tapestate_get(ti)==TS_WRI_INIT ||
- tapestate_get(ti)==TS_DSE_INIT ||
- tapestate_get(ti)==TS_EGA_INIT ||
- tapestate_get(ti)==TS_WTM_INIT){
- tape34xx_error_recovery_has_failed(ti,ENOSPC);
- } else {
- tape34xx_error_recovery_has_failed(ti,EIO);
- }
- return;
- case 0x39:
- // Backward at BOT. The drive is at BOT and is requestet to move backward.
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x3a:
- // Drive switched not ready, but the command needs the drive to be ready.
- PRINT_WARN("Drive not ready. Turn the ready/not ready switch to ready position and try again.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x3b:
- // Manual rewind or unload. This causes an I/O error.
- PRINT_WARN("Medium was rewound or unloaded manually. Expect errors! Please do only use the mtoffl and mtrew ioctl to unload tapes or rewind tapes.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x3c:
- case 0x3d:
- case 0x3e:
- case 0x3f:
- // These erpas are reserved -> BUG
- tape34xx_error_recovery_HWBUG(ti,17);
- return;
- case 0x40:
- // Overrun error. This should have been covered earlier -> bug.
- tape34xx_error_recovery_HWBUG(ti,18);
- return;
- case 0x41:
- // Record sequence error. This should have been covered earlier -> bug.
- tape34xx_error_recovery_HWBUG(ti,19);
- return;
- case 0x42:
- // Degraded mode. A condition that can cause degraded performace is detected.
- PRINT_WARN("Subsystem is running in degraded mode. This may compromise your performace.n");
- tape34xx_error_recovery_do_retry(ti);
- return;
- case 0x43:
- // Drive not ready. Probably swith the ready/not ready switch to ready?
- PRINT_WARN("The drive is not ready. Maybe no medium in?n");
- tape34xx_error_recovery_has_failed(ti,ENOMEDIUM);
- return;
- case 0x44:
- // Locate Block unsuccessfull. We'll report this.
- if ((tapestate_get(ti)!=TS_BLOCK_INIT) &&
- (tapestate_get(ti)!=TS_LBL_INIT)) {
- tape34xx_error_recovery_HWBUG(ti,20); // No locate block was issued...
- return;
- }
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x45:
- // The drive is assigned elsewhere [to a different channel path/computer].
- PRINT_WARN("The drive is assigned elsewhere.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x46:
- // Drive not online. Drive may be switched offline, the power supply may be switched off
- // or the drive address may not be set correctly.
- PRINT_WARN("The drive is not online.");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x47:
- // Volume fenced. cu reports volume integrity is lost!
- PRINT_WARN("Volume fenced. The volume integrity is lost! n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x48:
- // Log sense data and retry request. We'll do so...
- tape34xx_error_recovery_do_retry(ti);
- return;
- case 0x49:
- // Bus out check. A parity check error on the bus was found. PRINT_WARN("Bus out check. A data transfer over the bus was corrupted.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x4a:
- // Control unit erp failed. We'll report this.
- PRINT_WARN("The control unit failed recovering an I/O error.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x4b:
- // Cu and drive incompatible. The drive requests micro-program patches, which are not available on the cu.
- PRINT_WARN("The drive needs microprogram patches from the control unit, which are not available.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x4c:
- // Recovered Check-One failure. Cu develops a hardware error, but is able to recover. We'll reissue the command.
- tape34xx_error_recovery_do_retry(ti);
- return;
- case 0x4d:
- switch (cu_type) {
- case 0x3480:
- // This erpa is reserved for 3480 -> bug
- tape34xx_error_recovery_HWBUG(ti,21);
- return;
- case 0x3490:
- // Resetting event recieved. Since the driver does not support resetting event recovery
- // (which has to be handled by the I/O Layer), we'll report and retry our command.
- tape34xx_error_recovery_do_retry(ti);
- return;
- }
- case 0x4e:
- switch (cu_type) {
- case 0x3480:
- // This erpa is reserved for 3480 -> bug.
- tape34xx_error_recovery_HWBUG(ti,22);
- return;
- case 0x3490:
- // Maximum block size exeeded. This indicates, that the block to be written is larger
- // than allowed for buffered mode. We'll report this...
- PRINT_WARN("Maximum block size for buffered mode exceeded.n");
- tape34xx_error_recovery_has_failed(ti,ENOBUFS);
- return;
- }
- case 0x4f:
- // These erpas are reserved -> bug
- tape34xx_error_recovery_HWBUG(ti,23);
- return;
- case 0x50:
- // Read buffered log (Overflow). Cu is running in extended beffered log mode, and a counter overflows.
- // This should never happen, since we're never running in extended buffered log mode -> bug.
- tape34xx_error_recovery_do_retry(ti);
- return;
- case 0x51:
- // Read buffered log (EOV). EOF processing occurs while the cu is in extended buffered log mode.
- // This should never happen, since we're never running in extended buffered log mode -> bug.
- tape34xx_error_recovery_do_retry(ti);
- return;
- case 0x52:
- // End of Volume complete. Rewind unload completed ok. We'll report to the user...
- if (tapestate_get(ti)!=TS_RUN_INIT) {
- tape34xx_error_recovery_HWBUG(ti,24);
- return;
- }
- tape34xx_error_recovery_succeded(ti);
- return;
- case 0x53:
- // Global command intercept. We'll have to reissue our command.
- tape34xx_error_recovery_do_retry(ti);
- return;
- case 0x54:
- // Channel interface recovery (temporary). This can be recovered by reissuing the command.
- tape34xx_error_recovery_do_retry(ti);
- return;
- case 0x55:
- // Channel interface recovery (permanent). This cannot be recovered, we'll inform the user.
- PRINT_WARN("A permanent channel interface error occurred.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x56:
- // Channel protocol error. This cannot be recovered.
- PRINT_WARN("A channel protocol error occurred.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x57:
- switch (cu_type) {
- case 0x3480:
- // Attention intercept. We have to reissue the command.
- PRINT_WARN("An attention intercept occurred, which will be recovered.n");
- tape34xx_error_recovery_do_retry(ti);
- return;
- case 0x3490:
- // Global status intercept. We have to reissue the command.
- PRINT_WARN("An global status intercept was recieved, which will be recovered.n");
- tape34xx_error_recovery_do_retry(ti);
- return;
- }
- case 0x58:
- case 0x59:
- // These erpas are reserved -> bug.
- tape34xx_error_recovery_HWBUG(ti,25);
- return;
- case 0x5a:
- // Tape length incompatible. The tape inserted is too long,
- // which could cause damage to the tape or the drive.
- PRINT_WARN("Tape length incompatible [should be IBM Cartridge System Tape]. May cause damage to drive or tape.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x5b:
- // Format 3480 XF incompatible
- if (sense[1]&SENSE_BEGINNING_OF_TAPE) {
- // Everything is fine. The tape will be overwritten in a different format.
- tape34xx_error_recovery_do_retry(ti);
- return;
- }
- PRINT_WARN("Tape format is incompatible to the drive, which writes 3480-2 XF.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x5c:
- // Format 3480-2 XF incompatible
- PRINT_WARN("Tape format is incompatible to the drive. The drive cannot access 3480-2 XF volumes.n");
- tape34xx_error_recovery_has_failed(ti,EIO);
- return;
- case 0x5d:
- // Tape length violation.
- PRINT_WARN("Tape length violation [should be IBM Enhanced Capacity Cartridge System Tape]. May cause damage to drive or tape.n");
- tape34xx_error_recovery_has_failed(ti,EMEDIUMTYPE);
- return;
- case 0x5e:
- // Compaction algorithm incompatible.
- PRINT_WARN("The volume is recorded using an incompatible compaction algorith, which is not supported by the control unit.n");
- tape34xx_error_recovery_has_failed(ti,EMEDIUMTYPE);
- return;
- default:
- // Reserved erpas -> bug
- tape34xx_error_recovery_HWBUG(ti,26);
- return;
- }
- }
- void tape34xx_error_recovery_has_failed (tape_info_t* ti,int error_id) {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,3,"xerp fail");
- debug_text_event (tape_debug_area,3,(((tapestate_get (ti) < TS_SIZE) &&
- (tapestate_get (ti) >= 0)) ?
- state_verbose[tapestate_get (ti)] : "UNKNOWN"));
- #endif
- if ((tapestate_get(ti)!=TS_UNUSED) && (tapestate_get(ti)!=TS_IDLE)) {
- tape_dump_sense(&ti->devstat);
- ti->rc = -error_id;
- ti->wanna_wakeup=1;
- switch (tapestate_get(ti)) {
- case TS_REW_RELEASE_INIT:
- case TS_RFO_INIT:
- case TS_RBA_INIT:
- tapestate_set(ti,TS_FAILED);
- wake_up (&ti->wq);
- break;
- case TS_BLOCK_INIT:
- tapestate_set(ti,TS_FAILED);
- schedule_tapeblock_exec_IO(ti);
- break;
- default:
- tapestate_set(ti,TS_FAILED);
- wake_up_interruptible (&ti->wq);
- }
- } else {
- PRINT_WARN("Recieved an unsolicited IRQ.n");
- tape_dump_sense(&ti->devstat);
- }
- }
- void tape34xx_error_recovery_succeded(tape_info_t* ti) {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,3,"xerp done");
- debug_text_event (tape_debug_area,3,(((tapestate_get (ti) < TS_SIZE) &&
- (tapestate_get (ti) >= 0)) ?
- state_verbose[tapestate_get (ti)] : "UNKNOWN"));
- #endif
- if ((tapestate_get(ti)!=TS_UNUSED) && (tapestate_get(ti)!=TS_DONE)) {
- tapestate_event (ti, TE_DONE);
- } else {
- PRINT_WARN("Recieved an unsolicited IRQ.n");
- tape_dump_sense(&ti->devstat);
- }
- }
- void tape34xx_error_recovery_do_retry(tape_info_t* ti) {
- #ifdef TAPE_DEBUG
- debug_text_event (tape_debug_area,3,"xerp retr");
- debug_text_event (tape_debug_area,3,(((tapestate_get (ti) < TS_SIZE) &&
- (tapestate_get (ti) >= 0)) ?
- state_verbose[tapestate_get (ti)] : "UNKNOWN"));
- #endif
- if ((tapestate_get(ti)!=TS_UNUSED) && (tapestate_get(ti)!=TS_IDLE)) {
- tape_dump_sense(&ti->devstat);
- while (do_IO (ti->devinfo.irq, ti->cqr->cpaddr, (unsigned long) ti->cqr, 0x00, ti->cqr->options));
- } else {
- PRINT_WARN("Recieved an unsolicited IRQ.n");
- tape_dump_sense(&ti->devstat);
- }
- }
-
- void
- tape34xx_error_recovery_read_opposite (tape_info_t* ti) {
- switch (tapestate_get(ti)) {
- case TS_RFO_INIT:
- // We did read forward, but the data could not be read *correctly*.
- // We will read backward and then skip forward again.
- ti->cqr=tape34xx_read_opposite(ti,0);
- if (ti->cqr==NULL)
- tape34xx_error_recovery_has_failed(ti,EIO);
- else
- tape34xx_error_recovery_do_retry(ti);
- break;
- case TS_RBA_INIT:
- // We tried to read forward and backward, but hat no success -> failed.
- tape34xx_error_recovery_has_failed(ti,EIO);
- break;
- case TS_BLOCK_INIT:
- tape34xx_error_recovery_do_retry(ti);
- break;
- default:
- PRINT_WARN("read_opposite_recovery_called_with_state:%sn",
- (((tapestate_get (ti) < TS_SIZE) &&
- (tapestate_get (ti) >= 0)) ?
- state_verbose[tapestate_get (ti)] : "UNKNOWN"));
- }
- }
- void
- tape34xx_error_recovery_HWBUG (tape_info_t* ti,int condno) {
- devstat_t* stat=&ti->devstat;
- PRINT_WARN("An unexpected condition #%d was caught in tape error recovery.n",condno);
- PRINT_WARN("Please report this incident.n");
- PRINT_WARN("State of the tape:%sn",
- (((tapestate_get (ti) < TS_SIZE) &&
- (tapestate_get (ti) >= 0)) ?
- state_verbose[tapestate_get (ti)] : "UNKNOWN"));
- PRINT_INFO ("Sense data: %02X%02X%02X%02X %02X%02X%02X%02X "
- " %02X%02X%02X%02X %02X%02X%02X%02X n",
- stat->ii.sense.data[0], stat->ii.sense.data[1],
- stat->ii.sense.data[2], stat->ii.sense.data[3],
- stat->ii.sense.data[4], stat->ii.sense.data[5],
- stat->ii.sense.data[6], stat->ii.sense.data[7],
- stat->ii.sense.data[8], stat->ii.sense.data[9],
- stat->ii.sense.data[10], stat->ii.sense.data[11],
- stat->ii.sense.data[12], stat->ii.sense.data[13],
- stat->ii.sense.data[14], stat->ii.sense.data[15]);
- PRINT_INFO ("Sense data: %02X%02X%02X%02X %02X%02X%02X%02X "
- " %02X%02X%02X%02X %02X%02X%02X%02X n",
- stat->ii.sense.data[16], stat->ii.sense.data[17],
- stat->ii.sense.data[18], stat->ii.sense.data[19],
- stat->ii.sense.data[20], stat->ii.sense.data[21],
- stat->ii.sense.data[22], stat->ii.sense.data[23],
- stat->ii.sense.data[24], stat->ii.sense.data[25],
- stat->ii.sense.data[26], stat->ii.sense.data[27],
- stat->ii.sense.data[28], stat->ii.sense.data[29],
- stat->ii.sense.data[30], stat->ii.sense.data[31]);
- tape34xx_error_recovery_has_failed(ti,EIO);
- }