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path: root/drivers/s390/block/dasd_3990_erp.c
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Diffstat (limited to 'drivers/s390/block/dasd_3990_erp.c')
-rw-r--r--drivers/s390/block/dasd_3990_erp.c2742
1 files changed, 2742 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c
new file mode 100644
index 00000000000..c143ecb53d9
--- /dev/null
+++ b/drivers/s390/block/dasd_3990_erp.c
@@ -0,0 +1,2742 @@
+/*
+ * File...........: linux/drivers/s390/block/dasd_3990_erp.c
+ * Author(s)......: Horst Hummel <Horst.Hummel@de.ibm.com>
+ * Holger Smolinski <Holger.Smolinski@de.ibm.com>
+ * Bugreports.to..: <Linux390@de.ibm.com>
+ * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000, 2001
+ *
+ * $Revision: 1.36 $
+ */
+
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <asm/idals.h>
+#include <asm/todclk.h>
+
+#define PRINTK_HEADER "dasd_erp(3990): "
+
+#include "dasd_int.h"
+#include "dasd_eckd.h"
+
+
+struct DCTL_data {
+ unsigned char subcommand; /* e.g Inhibit Write, Enable Write,... */
+ unsigned char modifier; /* Subcommand modifier */
+ unsigned short res; /* reserved */
+} __attribute__ ((packed));
+
+/*
+ *****************************************************************************
+ * SECTION ERP EXAMINATION
+ *****************************************************************************
+ */
+
+/*
+ * DASD_3990_ERP_EXAMINE_24
+ *
+ * DESCRIPTION
+ * Checks only for fatal (unrecoverable) error.
+ * A detailed examination of the sense data is done later outside
+ * the interrupt handler.
+ *
+ * Each bit configuration leading to an action code 2 (Exit with
+ * programming error or unusual condition indication)
+ * are handled as fatal errorīs.
+ *
+ * All other configurations are handled as recoverable errors.
+ *
+ * RETURN VALUES
+ * dasd_era_fatal for all fatal (unrecoverable errors)
+ * dasd_era_recover for all others.
+ */
+static dasd_era_t
+dasd_3990_erp_examine_24(struct dasd_ccw_req * cqr, char *sense)
+{
+
+ struct dasd_device *device = cqr->device;
+
+ /* check for 'Command Reject' */
+ if ((sense[0] & SNS0_CMD_REJECT) &&
+ (!(sense[2] & SNS2_ENV_DATA_PRESENT))) {
+
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "EXAMINE 24: Command Reject detected - "
+ "fatal error");
+
+ return dasd_era_fatal;
+ }
+
+ /* check for 'Invalid Track Format' */
+ if ((sense[1] & SNS1_INV_TRACK_FORMAT) &&
+ (!(sense[2] & SNS2_ENV_DATA_PRESENT))) {
+
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "EXAMINE 24: Invalid Track Format detected "
+ "- fatal error");
+
+ return dasd_era_fatal;
+ }
+
+ /* check for 'No Record Found' */
+ if (sense[1] & SNS1_NO_REC_FOUND) {
+
+ /* FIXME: fatal error ?!? */
+ DEV_MESSAGE(KERN_ERR, device,
+ "EXAMINE 24: No Record Found detected %s",
+ device->state <= DASD_STATE_BASIC ?
+ " " : "- fatal error");
+
+ return dasd_era_fatal;
+ }
+
+ /* return recoverable for all others */
+ return dasd_era_recover;
+} /* END dasd_3990_erp_examine_24 */
+
+/*
+ * DASD_3990_ERP_EXAMINE_32
+ *
+ * DESCRIPTION
+ * Checks only for fatal/no/recoverable error.
+ * A detailed examination of the sense data is done later outside
+ * the interrupt handler.
+ *
+ * RETURN VALUES
+ * dasd_era_none no error
+ * dasd_era_fatal for all fatal (unrecoverable errors)
+ * dasd_era_recover for recoverable others.
+ */
+static dasd_era_t
+dasd_3990_erp_examine_32(struct dasd_ccw_req * cqr, char *sense)
+{
+
+ struct dasd_device *device = cqr->device;
+
+ switch (sense[25]) {
+ case 0x00:
+ return dasd_era_none;
+
+ case 0x01:
+ DEV_MESSAGE(KERN_ERR, device, "%s", "EXAMINE 32: fatal error");
+
+ return dasd_era_fatal;
+
+ default:
+
+ return dasd_era_recover;
+ }
+
+} /* end dasd_3990_erp_examine_32 */
+
+/*
+ * DASD_3990_ERP_EXAMINE
+ *
+ * DESCRIPTION
+ * Checks only for fatal/no/recover error.
+ * A detailed examination of the sense data is done later outside
+ * the interrupt handler.
+ *
+ * The logic is based on the 'IBM 3990 Storage Control Reference' manual
+ * 'Chapter 7. Error Recovery Procedures'.
+ *
+ * RETURN VALUES
+ * dasd_era_none no error
+ * dasd_era_fatal for all fatal (unrecoverable errors)
+ * dasd_era_recover for all others.
+ */
+dasd_era_t
+dasd_3990_erp_examine(struct dasd_ccw_req * cqr, struct irb * irb)
+{
+
+ char *sense = irb->ecw;
+ dasd_era_t era = dasd_era_recover;
+ struct dasd_device *device = cqr->device;
+
+ /* check for successful execution first */
+ if (irb->scsw.cstat == 0x00 &&
+ irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
+ return dasd_era_none;
+
+ /* distinguish between 24 and 32 byte sense data */
+ if (sense[27] & DASD_SENSE_BIT_0) {
+
+ era = dasd_3990_erp_examine_24(cqr, sense);
+
+ } else {
+
+ era = dasd_3990_erp_examine_32(cqr, sense);
+
+ }
+
+ /* log the erp chain if fatal error occurred */
+ if ((era == dasd_era_fatal) && (device->state >= DASD_STATE_READY)) {
+ dasd_log_sense(cqr, irb);
+ dasd_log_ccw(cqr, 0, irb->scsw.cpa);
+ }
+
+ return era;
+
+} /* END dasd_3990_erp_examine */
+
+/*
+ *****************************************************************************
+ * SECTION ERP HANDLING
+ *****************************************************************************
+ */
+/*
+ *****************************************************************************
+ * 24 and 32 byte sense ERP functions
+ *****************************************************************************
+ */
+
+/*
+ * DASD_3990_ERP_CLEANUP
+ *
+ * DESCRIPTION
+ * Removes the already build but not necessary ERP request and sets
+ * the status of the original cqr / erp to the given (final) status
+ *
+ * PARAMETER
+ * erp request to be blocked
+ * final_status either DASD_CQR_DONE or DASD_CQR_FAILED
+ *
+ * RETURN VALUES
+ * cqr original cqr
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status)
+{
+ struct dasd_ccw_req *cqr = erp->refers;
+
+ dasd_free_erp_request(erp, erp->device);
+ cqr->status = final_status;
+ return cqr;
+
+} /* end dasd_3990_erp_cleanup */
+
+/*
+ * DASD_3990_ERP_BLOCK_QUEUE
+ *
+ * DESCRIPTION
+ * Block the given device request queue to prevent from further
+ * processing until the started timer has expired or an related
+ * interrupt was received.
+ */
+static void
+dasd_3990_erp_block_queue(struct dasd_ccw_req * erp, int expires)
+{
+
+ struct dasd_device *device = erp->device;
+
+ DEV_MESSAGE(KERN_INFO, device,
+ "blocking request queue for %is", expires/HZ);
+
+ device->stopped |= DASD_STOPPED_PENDING;
+ erp->status = DASD_CQR_QUEUED;
+
+ dasd_set_timer(device, expires);
+}
+
+/*
+ * DASD_3990_ERP_INT_REQ
+ *
+ * DESCRIPTION
+ * Handles 'Intervention Required' error.
+ * This means either device offline or not installed.
+ *
+ * PARAMETER
+ * erp current erp
+ * RETURN VALUES
+ * erp modified erp
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_int_req(struct dasd_ccw_req * erp)
+{
+
+ struct dasd_device *device = erp->device;
+
+ /* first time set initial retry counter and erp_function */
+ /* and retry once without blocking queue */
+ /* (this enables easier enqueing of the cqr) */
+ if (erp->function != dasd_3990_erp_int_req) {
+
+ erp->retries = 256;
+ erp->function = dasd_3990_erp_int_req;
+
+ } else {
+
+ /* issue a message and wait for 'device ready' interrupt */
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "is offline or not installed - "
+ "INTERVENTION REQUIRED!!");
+
+ dasd_3990_erp_block_queue(erp, 60*HZ);
+ }
+
+ return erp;
+
+} /* end dasd_3990_erp_int_req */
+
+/*
+ * DASD_3990_ERP_ALTERNATE_PATH
+ *
+ * DESCRIPTION
+ * Repeat the operation on a different channel path.
+ * If all alternate paths have been tried, the request is posted with a
+ * permanent error.
+ *
+ * PARAMETER
+ * erp pointer to the current ERP
+ *
+ * RETURN VALUES
+ * erp modified pointer to the ERP
+ */
+static void
+dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp)
+{
+ struct dasd_device *device = erp->device;
+ __u8 opm;
+
+ /* try alternate valid path */
+ opm = ccw_device_get_path_mask(device->cdev);
+ //FIXME: start with get_opm ?
+ if (erp->lpm == 0)
+ erp->lpm = LPM_ANYPATH & ~(erp->irb.esw.esw0.sublog.lpum);
+ else
+ erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum);
+
+ if ((erp->lpm & opm) != 0x00) {
+
+ DEV_MESSAGE(KERN_DEBUG, device,
+ "try alternate lpm=%x (lpum=%x / opm=%x)",
+ erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm);
+
+ /* reset status to queued to handle the request again... */
+ if (erp->status > DASD_CQR_QUEUED)
+ erp->status = DASD_CQR_QUEUED;
+ erp->retries = 1;
+ } else {
+ DEV_MESSAGE(KERN_ERR, device,
+ "No alternate channel path left (lpum=%x / "
+ "opm=%x) -> permanent error",
+ erp->irb.esw.esw0.sublog.lpum, opm);
+
+ /* post request with permanent error */
+ if (erp->status > DASD_CQR_QUEUED)
+ erp->status = DASD_CQR_FAILED;
+ }
+} /* end dasd_3990_erp_alternate_path */
+
+/*
+ * DASD_3990_ERP_DCTL
+ *
+ * DESCRIPTION
+ * Setup cqr to do the Diagnostic Control (DCTL) command with an
+ * Inhibit Write subcommand (0x20) and the given modifier.
+ *
+ * PARAMETER
+ * erp pointer to the current (failed) ERP
+ * modifier subcommand modifier
+ *
+ * RETURN VALUES
+ * dctl_cqr pointer to NEW dctl_cqr
+ *
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier)
+{
+
+ struct dasd_device *device = erp->device;
+ struct DCTL_data *DCTL_data;
+ struct ccw1 *ccw;
+ struct dasd_ccw_req *dctl_cqr;
+
+ dctl_cqr = dasd_alloc_erp_request((char *) &erp->magic, 1,
+ sizeof (struct DCTL_data),
+ erp->device);
+ if (IS_ERR(dctl_cqr)) {
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "Unable to allocate DCTL-CQR");
+ erp->status = DASD_CQR_FAILED;
+ return erp;
+ }
+
+ DCTL_data = dctl_cqr->data;
+
+ DCTL_data->subcommand = 0x02; /* Inhibit Write */
+ DCTL_data->modifier = modifier;
+
+ ccw = dctl_cqr->cpaddr;
+ memset(ccw, 0, sizeof (struct ccw1));
+ ccw->cmd_code = CCW_CMD_DCTL;
+ ccw->count = 4;
+ ccw->cda = (__u32)(addr_t) DCTL_data;
+ dctl_cqr->function = dasd_3990_erp_DCTL;
+ dctl_cqr->refers = erp;
+ dctl_cqr->device = erp->device;
+ dctl_cqr->magic = erp->magic;
+ dctl_cqr->expires = 5 * 60 * HZ;
+ dctl_cqr->retries = 2;
+
+ dctl_cqr->buildclk = get_clock();
+
+ dctl_cqr->status = DASD_CQR_FILLED;
+
+ return dctl_cqr;
+
+} /* end dasd_3990_erp_DCTL */
+
+/*
+ * DASD_3990_ERP_ACTION_1
+ *
+ * DESCRIPTION
+ * Setup ERP to do the ERP action 1 (see Reference manual).
+ * Repeat the operation on a different channel path.
+ * If all alternate paths have been tried, the request is posted with a
+ * permanent error.
+ * Note: duplex handling is not implemented (yet).
+ *
+ * PARAMETER
+ * erp pointer to the current ERP
+ *
+ * RETURN VALUES
+ * erp pointer to the ERP
+ *
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_action_1(struct dasd_ccw_req * erp)
+{
+
+ erp->function = dasd_3990_erp_action_1;
+
+ dasd_3990_erp_alternate_path(erp);
+
+ return erp;
+
+} /* end dasd_3990_erp_action_1 */
+
+/*
+ * DASD_3990_ERP_ACTION_4
+ *
+ * DESCRIPTION
+ * Setup ERP to do the ERP action 4 (see Reference manual).
+ * Set the current request to PENDING to block the CQR queue for that device
+ * until the state change interrupt appears.
+ * Use a timer (20 seconds) to retry the cqr if the interrupt is still
+ * missing.
+ *
+ * PARAMETER
+ * sense sense data of the actual error
+ * erp pointer to the current ERP
+ *
+ * RETURN VALUES
+ * erp pointer to the ERP
+ *
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense)
+{
+
+ struct dasd_device *device = erp->device;
+
+ /* first time set initial retry counter and erp_function */
+ /* and retry once without waiting for state change pending */
+ /* interrupt (this enables easier enqueing of the cqr) */
+ if (erp->function != dasd_3990_erp_action_4) {
+
+ DEV_MESSAGE(KERN_INFO, device, "%s",
+ "dasd_3990_erp_action_4: first time retry");
+
+ erp->retries = 256;
+ erp->function = dasd_3990_erp_action_4;
+
+ } else {
+
+ if (sense[25] == 0x1D) { /* state change pending */
+
+ DEV_MESSAGE(KERN_INFO, device,
+ "waiting for state change pending "
+ "interrupt, %d retries left",
+ erp->retries);
+
+ dasd_3990_erp_block_queue(erp, 30*HZ);
+
+ } else if (sense[25] == 0x1E) { /* busy */
+ DEV_MESSAGE(KERN_INFO, device,
+ "busy - redriving request later, "
+ "%d retries left",
+ erp->retries);
+ dasd_3990_erp_block_queue(erp, HZ);
+ } else {
+
+ /* no state change pending - retry */
+ DEV_MESSAGE (KERN_INFO, device,
+ "redriving request immediately, "
+ "%d retries left",
+ erp->retries);
+ erp->status = DASD_CQR_QUEUED;
+ }
+ }
+
+ return erp;
+
+} /* end dasd_3990_erp_action_4 */
+
+/*
+ *****************************************************************************
+ * 24 byte sense ERP functions (only)
+ *****************************************************************************
+ */
+
+/*
+ * DASD_3990_ERP_ACTION_5
+ *
+ * DESCRIPTION
+ * Setup ERP to do the ERP action 5 (see Reference manual).
+ * NOTE: Further handling is done in xxx_further_erp after the retries.
+ *
+ * PARAMETER
+ * erp pointer to the current ERP
+ *
+ * RETURN VALUES
+ * erp pointer to the ERP
+ *
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_action_5(struct dasd_ccw_req * erp)
+{
+
+ /* first of all retry */
+ erp->retries = 10;
+ erp->function = dasd_3990_erp_action_5;
+
+ return erp;
+
+} /* end dasd_3990_erp_action_5 */
+
+/*
+ * DASD_3990_HANDLE_ENV_DATA
+ *
+ * DESCRIPTION
+ * Handles 24 byte 'Environmental data present'.
+ * Does a analysis of the sense data (message Format)
+ * and prints the error messages.
+ *
+ * PARAMETER
+ * sense current sense data
+ *
+ * RETURN VALUES
+ * void
+ */
+static void
+dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense)
+{
+
+ struct dasd_device *device = erp->device;
+ char msg_format = (sense[7] & 0xF0);
+ char msg_no = (sense[7] & 0x0F);
+
+ switch (msg_format) {
+ case 0x00: /* Format 0 - Program or System Checks */
+
+ if (sense[1] & 0x10) { /* check message to operator bit */
+
+ switch (msg_no) {
+ case 0x00: /* No Message */
+ break;
+ case 0x01:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - Invalid Command");
+ break;
+ case 0x02:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - Invalid Command "
+ "Sequence");
+ break;
+ case 0x03:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - CCW Count less than "
+ "required");
+ break;
+ case 0x04:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - Invalid Parameter");
+ break;
+ case 0x05:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - Diagnostic of Sepecial"
+ " Command Violates File Mask");
+ break;
+ case 0x07:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - Channel Returned with "
+ "Incorrect retry CCW");
+ break;
+ case 0x08:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - Reset Notification");
+ break;
+ case 0x09:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - Storage Path Restart");
+ break;
+ case 0x0A:
+ DEV_MESSAGE(KERN_WARNING, device,
+ "FORMAT 0 - Channel requested "
+ "... %02x", sense[8]);
+ break;
+ case 0x0B:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - Invalid Defective/"
+ "Alternate Track Pointer");
+ break;
+ case 0x0C:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - DPS Installation "
+ "Check");
+ break;
+ case 0x0E:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - Command Invalid on "
+ "Secondary Address");
+ break;
+ case 0x0F:
+ DEV_MESSAGE(KERN_WARNING, device,
+ "FORMAT 0 - Status Not As "
+ "Required: reason %02x", sense[8]);
+ break;
+ default:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - Reseved");
+ }
+ } else {
+ switch (msg_no) {
+ case 0x00: /* No Message */
+ break;
+ case 0x01:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - Device Error Source");
+ break;
+ case 0x02:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - Reserved");
+ break;
+ case 0x03:
+ DEV_MESSAGE(KERN_WARNING, device,
+ "FORMAT 0 - Device Fenced - "
+ "device = %02x", sense[4]);
+ break;
+ case 0x04:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - Data Pinned for "
+ "Device");
+ break;
+ default:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 0 - Reserved");
+ }
+ }
+ break;
+
+ case 0x10: /* Format 1 - Device Equipment Checks */
+ switch (msg_no) {
+ case 0x00: /* No Message */
+ break;
+ case 0x01:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 1 - Device Status 1 not as "
+ "expected");
+ break;
+ case 0x03:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 1 - Index missing");
+ break;
+ case 0x04:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 1 - Interruption cannot be reset");
+ break;
+ case 0x05:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 1 - Device did not respond to "
+ "selection");
+ break;
+ case 0x06:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 1 - Device check-2 error or Set "
+ "Sector is not complete");
+ break;
+ case 0x07:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 1 - Head address does not "
+ "compare");
+ break;
+ case 0x08:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 1 - Device status 1 not valid");
+ break;
+ case 0x09:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 1 - Device not ready");
+ break;
+ case 0x0A:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 1 - Track physical address did "
+ "not compare");
+ break;
+ case 0x0B:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 1 - Missing device address bit");
+ break;
+ case 0x0C:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 1 - Drive motor switch is off");
+ break;
+ case 0x0D:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 1 - Seek incomplete");
+ break;
+ case 0x0E:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 1 - Cylinder address did not "
+ "compare");
+ break;
+ case 0x0F:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 1 - Offset active cannot be "
+ "reset");
+ break;
+ default:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 1 - Reserved");
+ }
+ break;
+
+ case 0x20: /* Format 2 - 3990 Equipment Checks */
+ switch (msg_no) {
+ case 0x08:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 2 - 3990 check-2 error");
+ break;
+ case 0x0E:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 2 - Support facility errors");
+ break;
+ case 0x0F:
+ DEV_MESSAGE(KERN_WARNING, device,
+ "FORMAT 2 - Microcode detected error %02x",
+ sense[8]);
+ break;
+ default:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 2 - Reserved");
+ }
+ break;
+
+ case 0x30: /* Format 3 - 3990 Control Checks */
+ switch (msg_no) {
+ case 0x0F:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 3 - Allegiance terminated");
+ break;
+ default:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 3 - Reserved");
+ }
+ break;
+
+ case 0x40: /* Format 4 - Data Checks */
+ switch (msg_no) {
+ case 0x00:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - Home address area error");
+ break;
+ case 0x01:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - Count area error");
+ break;
+ case 0x02:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - Key area error");
+ break;
+ case 0x03:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - Data area error");
+ break;
+ case 0x04:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - No sync byte in home address "
+ "area");
+ break;
+ case 0x05:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - No sync byte in count address "
+ "area");
+ break;
+ case 0x06:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - No sync byte in key area");
+ break;
+ case 0x07:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - No sync byte in data area");
+ break;
+ case 0x08:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - Home address area error; "
+ "offset active");
+ break;
+ case 0x09:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - Count area error; offset "
+ "active");
+ break;
+ case 0x0A:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - Key area error; offset "
+ "active");
+ break;
+ case 0x0B:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - Data area error; "
+ "offset active");
+ break;
+ case 0x0C:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - No sync byte in home "
+ "address area; offset active");
+ break;
+ case 0x0D:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - No syn byte in count "
+ "address area; offset active");
+ break;
+ case 0x0E:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - No sync byte in key area; "
+ "offset active");
+ break;
+ case 0x0F:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - No syn byte in data area; "
+ "offset active");
+ break;
+ default:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 4 - Reserved");
+ }
+ break;
+
+ case 0x50: /* Format 5 - Data Check with displacement information */
+ switch (msg_no) {
+ case 0x00:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 5 - Data Check in the "
+ "home address area");
+ break;
+ case 0x01:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 5 - Data Check in the count area");
+ break;
+ case 0x02:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 5 - Data Check in the key area");
+ break;
+ case 0x03:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 5 - Data Check in the data area");
+ break;
+ case 0x08:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 5 - Data Check in the "
+ "home address area; offset active");
+ break;
+ case 0x09:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 5 - Data Check in the count area; "
+ "offset active");
+ break;
+ case 0x0A:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 5 - Data Check in the key area; "
+ "offset active");
+ break;
+ case 0x0B:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 5 - Data Check in the data area; "
+ "offset active");
+ break;
+ default:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 5 - Reserved");
+ }
+ break;
+
+ case 0x60: /* Format 6 - Usage Statistics/Overrun Errors */
+ switch (msg_no) {
+ case 0x00:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 6 - Overrun on channel A");
+ break;
+ case 0x01:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 6 - Overrun on channel B");
+ break;
+ case 0x02:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 6 - Overrun on channel C");
+ break;
+ case 0x03:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 6 - Overrun on channel D");
+ break;
+ case 0x04:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 6 - Overrun on channel E");
+ break;
+ case 0x05:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 6 - Overrun on channel F");
+ break;
+ case 0x06:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 6 - Overrun on channel G");
+ break;
+ case 0x07:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 6 - Overrun on channel H");
+ break;
+ default:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 6 - Reserved");
+ }
+ break;
+
+ case 0x70: /* Format 7 - Device Connection Control Checks */
+ switch (msg_no) {
+ case 0x00:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 7 - RCC initiated by a connection "
+ "check alert");
+ break;
+ case 0x01:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 7 - RCC 1 sequence not "
+ "successful");
+ break;
+ case 0x02:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 7 - RCC 1 and RCC 2 sequences not "
+ "successful");
+ break;
+ case 0x03:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 7 - Invalid tag-in during "
+ "selection sequence");
+ break;
+ case 0x04:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 7 - extra RCC required");
+ break;
+ case 0x05:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 7 - Invalid DCC selection "
+ "response or timeout");
+ break;
+ case 0x06:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 7 - Missing end operation; device "
+ "transfer complete");
+ break;
+ case 0x07:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 7 - Missing end operation; device "
+ "transfer incomplete");
+ break;
+ case 0x08:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 7 - Invalid tag-in for an "
+ "immediate command sequence");
+ break;
+ case 0x09:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 7 - Invalid tag-in for an "
+ "extended command sequence");
+ break;
+ case 0x0A:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 7 - 3990 microcode time out when "
+ "stopping selection");
+ break;
+ case 0x0B:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 7 - No response to selection "
+ "after a poll interruption");
+ break;
+ case 0x0C:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 7 - Permanent path error (DASD "
+ "controller not available)");
+ break;
+ case 0x0D:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 7 - DASD controller not available"
+ " on disconnected command chain");
+ break;
+ default:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 7 - Reserved");
+ }
+ break;
+
+ case 0x80: /* Format 8 - Additional Device Equipment Checks */
+ switch (msg_no) {
+ case 0x00: /* No Message */
+ case 0x01:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 8 - Error correction code "
+ "hardware fault");
+ break;
+ case 0x03:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 8 - Unexpected end operation "
+ "response code");
+ break;
+ case 0x04:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 8 - End operation with transfer "
+ "count not zero");
+ break;
+ case 0x05:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 8 - End operation with transfer "
+ "count zero");
+ break;
+ case 0x06:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 8 - DPS checks after a system "
+ "reset or selective reset");
+ break;
+ case 0x07:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 8 - DPS cannot be filled");
+ break;
+ case 0x08:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 8 - Short busy time-out during "
+ "device selection");
+ break;
+ case 0x09:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 8 - DASD controller failed to "
+ "set or reset the long busy latch");
+ break;
+ case 0x0A:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 8 - No interruption from device "
+ "during a command chain");
+ break;
+ default:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 8 - Reserved");
+ }
+ break;
+
+ case 0x90: /* Format 9 - Device Read, Write, and Seek Checks */
+ switch (msg_no) {
+ case 0x00:
+ break; /* No Message */
+ case 0x06:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 9 - Device check-2 error");
+ break;
+ case 0x07:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 9 - Head address did not compare");
+ break;
+ case 0x0A:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 9 - Track physical address did "
+ "not compare while oriented");
+ break;
+ case 0x0E:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 9 - Cylinder address did not "
+ "compare");
+ break;
+ default:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT 9 - Reserved");
+ }
+ break;
+
+ case 0xF0: /* Format F - Cache Storage Checks */
+ switch (msg_no) {
+ case 0x00:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT F - Operation Terminated");
+ break;
+ case 0x01:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT F - Subsystem Processing Error");
+ break;
+ case 0x02:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT F - Cache or nonvolatile storage "
+ "equipment failure");
+ break;
+ case 0x04:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT F - Caching terminated");
+ break;
+ case 0x06:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT F - Cache fast write access not "
+ "authorized");
+ break;
+ case 0x07:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT F - Track format incorrect");
+ break;
+ case 0x09:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT F - Caching reinitiated");
+ break;
+ case 0x0A:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT F - Nonvolatile storage "
+ "terminated");
+ break;
+ case 0x0B:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT F - Volume is suspended duplex");
+ break;
+ case 0x0C:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT F - Subsystem status connot be "
+ "determined");
+ break;
+ case 0x0D:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT F - Caching status reset to "
+ "default");
+ break;
+ case 0x0E:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT F - DASD Fast Write inhibited");
+ break;
+ default:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "FORMAT D - Reserved");
+ }
+ break;
+
+ default: /* unknown message format - should not happen */
+ DEV_MESSAGE (KERN_WARNING, device,
+ "unknown message format %02x",
+ msg_format);
+ break;
+ } /* end switch message format */
+
+} /* end dasd_3990_handle_env_data */
+
+/*
+ * DASD_3990_ERP_COM_REJ
+ *
+ * DESCRIPTION
+ * Handles 24 byte 'Command Reject' error.
+ *
+ * PARAMETER
+ * erp current erp_head
+ * sense current sense data
+ *
+ * RETURN VALUES
+ * erp 'new' erp_head - pointer to new ERP
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense)
+{
+
+ struct dasd_device *device = erp->device;
+
+ erp->function = dasd_3990_erp_com_rej;
+
+ /* env data present (ACTION 10 - retry should work) */
+ if (sense[2] & SNS2_ENV_DATA_PRESENT) {
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Command Reject - environmental data present");
+
+ dasd_3990_handle_env_data(erp, sense);
+
+ erp->retries = 5;
+
+ } else {
+ /* fatal error - set status to FAILED */
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "Command Reject - Fatal error");
+
+ erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
+ }
+
+ return erp;
+
+} /* end dasd_3990_erp_com_rej */
+
+/*
+ * DASD_3990_ERP_BUS_OUT
+ *
+ * DESCRIPTION
+ * Handles 24 byte 'Bus Out Parity Check' error.
+ *
+ * PARAMETER
+ * erp current erp_head
+ * RETURN VALUES
+ * erp new erp_head - pointer to new ERP
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_bus_out(struct dasd_ccw_req * erp)
+{
+
+ struct dasd_device *device = erp->device;
+
+ /* first time set initial retry counter and erp_function */
+ /* and retry once without blocking queue */
+ /* (this enables easier enqueing of the cqr) */
+ if (erp->function != dasd_3990_erp_bus_out) {
+ erp->retries = 256;
+ erp->function = dasd_3990_erp_bus_out;
+
+ } else {
+
+ /* issue a message and wait for 'device ready' interrupt */
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "bus out parity error or BOPC requested by "
+ "channel");
+
+ dasd_3990_erp_block_queue(erp, 60*HZ);
+
+ }
+
+ return erp;
+
+} /* end dasd_3990_erp_bus_out */
+
+/*
+ * DASD_3990_ERP_EQUIP_CHECK
+ *
+ * DESCRIPTION
+ * Handles 24 byte 'Equipment Check' error.
+ *
+ * PARAMETER
+ * erp current erp_head
+ * RETURN VALUES
+ * erp new erp_head - pointer to new ERP
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense)
+{
+
+ struct dasd_device *device = erp->device;
+
+ erp->function = dasd_3990_erp_equip_check;
+
+ if (sense[1] & SNS1_WRITE_INHIBITED) {
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Write inhibited path encountered");
+
+ /* vary path offline */
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "Path should be varied off-line. "
+ "This is not implemented yet \n - please report "
+ "to linux390@de.ibm.com");
+
+ erp = dasd_3990_erp_action_1(erp);
+
+ } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Equipment Check - " "environmental data present");
+
+ dasd_3990_handle_env_data(erp, sense);
+
+ erp = dasd_3990_erp_action_4(erp, sense);
+
+ } else if (sense[1] & SNS1_PERM_ERR) {
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Equipment Check - retry exhausted or "
+ "undesirable");
+
+ erp = dasd_3990_erp_action_1(erp);
+
+ } else {
+ /* all other equipment checks - Action 5 */
+ /* rest is done when retries == 0 */
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Equipment check or processing error");
+
+ erp = dasd_3990_erp_action_5(erp);
+ }
+
+ return erp;
+
+} /* end dasd_3990_erp_equip_check */
+
+/*
+ * DASD_3990_ERP_DATA_CHECK
+ *
+ * DESCRIPTION
+ * Handles 24 byte 'Data Check' error.
+ *
+ * PARAMETER
+ * erp current erp_head
+ * RETURN VALUES
+ * erp new erp_head - pointer to new ERP
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense)
+{
+
+ struct dasd_device *device = erp->device;
+
+ erp->function = dasd_3990_erp_data_check;
+
+ if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */
+
+ /* issue message that the data has been corrected */
+ DEV_MESSAGE(KERN_EMERG, device, "%s",
+ "Data recovered during retry with PCI "
+ "fetch mode active");
+
+ /* not possible to handle this situation in Linux */
+ panic("No way to inform application about the possibly "
+ "incorrect data");
+
+ } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Uncorrectable data check recovered secondary "
+ "addr of duplex pair");
+
+ erp = dasd_3990_erp_action_4(erp, sense);
+
+ } else if (sense[1] & SNS1_PERM_ERR) {
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Uncorrectable data check with internal "
+ "retry exhausted");
+
+ erp = dasd_3990_erp_action_1(erp);
+
+ } else {
+ /* all other data checks */
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Uncorrectable data check with retry count "
+ "exhausted...");
+
+ erp = dasd_3990_erp_action_5(erp);
+ }
+
+ return erp;
+
+} /* end dasd_3990_erp_data_check */
+
+/*
+ * DASD_3990_ERP_OVERRUN
+ *
+ * DESCRIPTION
+ * Handles 24 byte 'Overrun' error.
+ *
+ * PARAMETER
+ * erp current erp_head
+ * RETURN VALUES
+ * erp new erp_head - pointer to new ERP
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense)
+{
+
+ struct dasd_device *device = erp->device;
+
+ erp->function = dasd_3990_erp_overrun;
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Overrun - service overrun or overrun"
+ " error requested by channel");
+
+ erp = dasd_3990_erp_action_5(erp);
+
+ return erp;
+
+} /* end dasd_3990_erp_overrun */
+
+/*
+ * DASD_3990_ERP_INV_FORMAT
+ *
+ * DESCRIPTION
+ * Handles 24 byte 'Invalid Track Format' error.
+ *
+ * PARAMETER
+ * erp current erp_head
+ * RETURN VALUES
+ * erp new erp_head - pointer to new ERP
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense)
+{
+
+ struct dasd_device *device = erp->device;
+
+ erp->function = dasd_3990_erp_inv_format;
+
+ if (sense[2] & SNS2_ENV_DATA_PRESENT) {
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Track format error when destaging or "
+ "staging data");
+
+ dasd_3990_handle_env_data(erp, sense);
+
+ erp = dasd_3990_erp_action_4(erp, sense);
+
+ } else {
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "Invalid Track Format - Fatal error should have "
+ "been handled within the interrupt handler");
+
+ erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
+ }
+
+ return erp;
+
+} /* end dasd_3990_erp_inv_format */
+
+/*
+ * DASD_3990_ERP_EOC
+ *
+ * DESCRIPTION
+ * Handles 24 byte 'End-of-Cylinder' error.
+ *
+ * PARAMETER
+ * erp already added default erp
+ * RETURN VALUES
+ * erp pointer to original (failed) cqr.
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense)
+{
+
+ struct dasd_device *device = default_erp->device;
+
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "End-of-Cylinder - must never happen");
+
+ /* implement action 7 - BUG */
+ return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
+
+} /* end dasd_3990_erp_EOC */
+
+/*
+ * DASD_3990_ERP_ENV_DATA
+ *
+ * DESCRIPTION
+ * Handles 24 byte 'Environmental-Data Present' error.
+ *
+ * PARAMETER
+ * erp current erp_head
+ * RETURN VALUES
+ * erp new erp_head - pointer to new ERP
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense)
+{
+
+ struct dasd_device *device = erp->device;
+
+ erp->function = dasd_3990_erp_env_data;
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s", "Environmental data present");
+
+ dasd_3990_handle_env_data(erp, sense);
+
+ /* don't retry on disabled interface */
+ if (sense[7] != 0x0F) {
+
+ erp = dasd_3990_erp_action_4(erp, sense);
+ } else {
+
+ erp = dasd_3990_erp_cleanup(erp, DASD_CQR_IN_IO);
+ }
+
+ return erp;
+
+} /* end dasd_3990_erp_env_data */
+
+/*
+ * DASD_3990_ERP_NO_REC
+ *
+ * DESCRIPTION
+ * Handles 24 byte 'No Record Found' error.
+ *
+ * PARAMETER
+ * erp already added default ERP
+ *
+ * RETURN VALUES
+ * erp new erp_head - pointer to new ERP
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense)
+{
+
+ struct dasd_device *device = default_erp->device;
+
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "No Record Found - Fatal error should "
+ "have been handled within the interrupt handler");
+
+ return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
+
+} /* end dasd_3990_erp_no_rec */
+
+/*
+ * DASD_3990_ERP_FILE_PROT
+ *
+ * DESCRIPTION
+ * Handles 24 byte 'File Protected' error.
+ * Note: Seek related recovery is not implemented because
+ * wee don't use the seek command yet.
+ *
+ * PARAMETER
+ * erp current erp_head
+ * RETURN VALUES
+ * erp new erp_head - pointer to new ERP
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_file_prot(struct dasd_ccw_req * erp)
+{
+
+ struct dasd_device *device = erp->device;
+
+ DEV_MESSAGE(KERN_ERR, device, "%s", "File Protected");
+
+ return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
+
+} /* end dasd_3990_erp_file_prot */
+
+/*
+ * DASD_3990_ERP_INSPECT_24
+ *
+ * DESCRIPTION
+ * Does a detailed inspection of the 24 byte sense data
+ * and sets up a related error recovery action.
+ *
+ * PARAMETER
+ * sense sense data of the actual error
+ * erp pointer to the currently created default ERP
+ *
+ * RETURN VALUES
+ * erp pointer to the (addtitional) ERP
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense)
+{
+
+ struct dasd_ccw_req *erp_filled = NULL;
+
+ /* Check sense for .... */
+ /* 'Command Reject' */
+ if ((erp_filled == NULL) && (sense[0] & SNS0_CMD_REJECT)) {
+ erp_filled = dasd_3990_erp_com_rej(erp, sense);
+ }
+ /* 'Intervention Required' */
+ if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) {
+ erp_filled = dasd_3990_erp_int_req(erp);
+ }
+ /* 'Bus Out Parity Check' */
+ if ((erp_filled == NULL) && (sense[0] & SNS0_BUS_OUT_CHECK)) {
+ erp_filled = dasd_3990_erp_bus_out(erp);
+ }
+ /* 'Equipment Check' */
+ if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) {
+ erp_filled = dasd_3990_erp_equip_check(erp, sense);
+ }
+ /* 'Data Check' */
+ if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) {
+ erp_filled = dasd_3990_erp_data_check(erp, sense);
+ }
+ /* 'Overrun' */
+ if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) {
+ erp_filled = dasd_3990_erp_overrun(erp, sense);
+ }
+ /* 'Invalid Track Format' */
+ if ((erp_filled == NULL) && (sense[1] & SNS1_INV_TRACK_FORMAT)) {
+ erp_filled = dasd_3990_erp_inv_format(erp, sense);
+ }
+ /* 'End-of-Cylinder' */
+ if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) {
+ erp_filled = dasd_3990_erp_EOC(erp, sense);
+ }
+ /* 'Environmental Data' */
+ if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) {
+ erp_filled = dasd_3990_erp_env_data(erp, sense);
+ }
+ /* 'No Record Found' */
+ if ((erp_filled == NULL) && (sense[1] & SNS1_NO_REC_FOUND)) {
+ erp_filled = dasd_3990_erp_no_rec(erp, sense);
+ }
+ /* 'File Protected' */
+ if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) {
+ erp_filled = dasd_3990_erp_file_prot(erp);
+ }
+ /* other (unknown) error - do default ERP */
+ if (erp_filled == NULL) {
+
+ erp_filled = erp;
+ }
+
+ return erp_filled;
+
+} /* END dasd_3990_erp_inspect_24 */
+
+/*
+ *****************************************************************************
+ * 32 byte sense ERP functions (only)
+ *****************************************************************************
+ */
+
+/*
+ * DASD_3990_ERPACTION_10_32
+ *
+ * DESCRIPTION
+ * Handles 32 byte 'Action 10' of Single Program Action Codes.
+ * Just retry and if retry doesn't work, return with error.
+ *
+ * PARAMETER
+ * erp current erp_head
+ * sense current sense data
+ * RETURN VALUES
+ * erp modified erp_head
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense)
+{
+
+ struct dasd_device *device = erp->device;
+
+ erp->retries = 256;
+ erp->function = dasd_3990_erp_action_10_32;
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s", "Perform logging requested");
+
+ return erp;
+
+} /* end dasd_3990_erp_action_10_32 */
+
+/*
+ * DASD_3990_ERP_ACTION_1B_32
+ *
+ * DESCRIPTION
+ * Handles 32 byte 'Action 1B' of Single Program Action Codes.
+ * A write operation could not be finished because of an unexpected
+ * condition.
+ * The already created 'default erp' is used to get the link to
+ * the erp chain, but it can not be used for this recovery
+ * action because it contains no DE/LO data space.
+ *
+ * PARAMETER
+ * default_erp already added default erp.
+ * sense current sense data
+ *
+ * RETURN VALUES
+ * erp new erp or
+ * default_erp in case of imprecise ending or error
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
+{
+
+ struct dasd_device *device = default_erp->device;
+ __u32 cpa = 0;
+ struct dasd_ccw_req *cqr;
+ struct dasd_ccw_req *erp;
+ struct DE_eckd_data *DE_data;
+ char *LO_data; /* LO_eckd_data_t */
+ struct ccw1 *ccw;
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Write not finished because of unexpected condition");
+
+ default_erp->function = dasd_3990_erp_action_1B_32;
+
+ /* determine the original cqr */
+ cqr = default_erp;
+
+ while (cqr->refers != NULL) {
+ cqr = cqr->refers;
+ }
+
+ /* for imprecise ending just do default erp */
+ if (sense[1] & 0x01) {
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Imprecise ending is set - just retry");
+
+ return default_erp;
+ }
+
+ /* determine the address of the CCW to be restarted */
+ /* Imprecise ending is not set -> addr from IRB-SCSW */
+ cpa = default_erp->refers->irb.scsw.cpa;
+
+ if (cpa == 0) {
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Unable to determine address of the CCW "
+ "to be restarted");
+
+ return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
+ }
+
+ /* Build new ERP request including DE/LO */
+ erp = dasd_alloc_erp_request((char *) &cqr->magic,
+ 2 + 1,/* DE/LO + TIC */
+ sizeof (struct DE_eckd_data) +
+ sizeof (struct LO_eckd_data), device);
+
+ if (IS_ERR(erp)) {
+ DEV_MESSAGE(KERN_ERR, device, "%s", "Unable to allocate ERP");
+ return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
+ }
+
+ /* use original DE */
+ DE_data = erp->data;
+ memcpy(DE_data, cqr->data, sizeof (struct DE_eckd_data));
+
+ /* create LO */
+ LO_data = erp->data + sizeof (struct DE_eckd_data);
+
+ if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
+
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "BUG - this should not happen");
+
+ return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
+ }
+
+ if ((sense[7] & 0x3F) == 0x01) {
+ /* operation code is WRITE DATA -> data area orientation */
+ LO_data[0] = 0x81;
+
+ } else if ((sense[7] & 0x3F) == 0x03) {
+ /* operation code is FORMAT WRITE -> index orientation */
+ LO_data[0] = 0xC3;
+
+ } else {
+ LO_data[0] = sense[7]; /* operation */
+ }
+
+ LO_data[1] = sense[8]; /* auxiliary */
+ LO_data[2] = sense[9];
+ LO_data[3] = sense[3]; /* count */
+ LO_data[4] = sense[29]; /* seek_addr.cyl */
+ LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
+ LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
+
+ memcpy(&(LO_data[8]), &(sense[11]), 8);
+
+ /* create DE ccw */
+ ccw = erp->cpaddr;
+ memset(ccw, 0, sizeof (struct ccw1));
+ ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
+ ccw->flags = CCW_FLAG_CC;
+ ccw->count = 16;
+ ccw->cda = (__u32)(addr_t) DE_data;
+
+ /* create LO ccw */
+ ccw++;
+ memset(ccw, 0, sizeof (struct ccw1));
+ ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
+ ccw->flags = CCW_FLAG_CC;
+ ccw->count = 16;
+ ccw->cda = (__u32)(addr_t) LO_data;
+
+ /* TIC to the failed ccw */
+ ccw++;
+ ccw->cmd_code = CCW_CMD_TIC;
+ ccw->cda = cpa;
+
+ /* fill erp related fields */
+ erp->function = dasd_3990_erp_action_1B_32;
+ erp->refers = default_erp->refers;
+ erp->device = device;
+ erp->magic = default_erp->magic;
+ erp->expires = 0;
+ erp->retries = 256;
+ erp->buildclk = get_clock();
+ erp->status = DASD_CQR_FILLED;
+
+ /* remove the default erp */
+ dasd_free_erp_request(default_erp, device);
+
+ return erp;
+
+} /* end dasd_3990_erp_action_1B_32 */
+
+/*
+ * DASD_3990_UPDATE_1B
+ *
+ * DESCRIPTION
+ * Handles the update to the 32 byte 'Action 1B' of Single Program
+ * Action Codes in case the first action was not successful.
+ * The already created 'previous_erp' is the currently not successful
+ * ERP.
+ *
+ * PARAMETER
+ * previous_erp already created previous erp.
+ * sense current sense data
+ * RETURN VALUES
+ * erp modified erp
+ */
+static struct dasd_ccw_req *
+dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
+{
+
+ struct dasd_device *device = previous_erp->device;
+ __u32 cpa = 0;
+ struct dasd_ccw_req *cqr;
+ struct dasd_ccw_req *erp;
+ char *LO_data; /* struct LO_eckd_data */
+ struct ccw1 *ccw;
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Write not finished because of unexpected condition"
+ " - follow on");
+
+ /* determine the original cqr */
+ cqr = previous_erp;
+
+ while (cqr->refers != NULL) {
+ cqr = cqr->refers;
+ }
+
+ /* for imprecise ending just do default erp */
+ if (sense[1] & 0x01) {
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Imprecise ending is set - just retry");
+
+ previous_erp->status = DASD_CQR_QUEUED;
+
+ return previous_erp;
+ }
+
+ /* determine the address of the CCW to be restarted */
+ /* Imprecise ending is not set -> addr from IRB-SCSW */
+ cpa = previous_erp->irb.scsw.cpa;
+
+ if (cpa == 0) {
+
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Unable to determine address of the CCW "
+ "to be restarted");
+
+ previous_erp->status = DASD_CQR_FAILED;
+
+ return previous_erp;
+ }
+
+ erp = previous_erp;
+
+ /* update the LO with the new returned sense data */
+ LO_data = erp->data + sizeof (struct DE_eckd_data);
+
+ if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
+
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "BUG - this should not happen");
+
+ previous_erp->status = DASD_CQR_FAILED;
+
+ return previous_erp;
+ }
+
+ if ((sense[7] & 0x3F) == 0x01) {
+ /* operation code is WRITE DATA -> data area orientation */
+ LO_data[0] = 0x81;
+
+ } else if ((sense[7] & 0x3F) == 0x03) {
+ /* operation code is FORMAT WRITE -> index orientation */
+ LO_data[0] = 0xC3;
+
+ } else {
+ LO_data[0] = sense[7]; /* operation */
+ }
+
+ LO_data[1] = sense[8]; /* auxiliary */
+ LO_data[2] = sense[9];
+ LO_data[3] = sense[3]; /* count */
+ LO_data[4] = sense[29]; /* seek_addr.cyl */
+ LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
+ LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
+
+ memcpy(&(LO_data[8]), &(sense[11]), 8);
+
+ /* TIC to the failed ccw */
+ ccw = erp->cpaddr; /* addr of DE ccw */
+ ccw++; /* addr of LE ccw */
+ ccw++; /* addr of TIC ccw */
+ ccw->cda = cpa;
+
+ erp->status = DASD_CQR_QUEUED;
+
+ return erp;
+
+} /* end dasd_3990_update_1B */
+
+/*
+ * DASD_3990_ERP_COMPOUND_RETRY
+ *
+ * DESCRIPTION
+ * Handles the compound ERP action retry code.
+ * NOTE: At least one retry is done even if zero is specified
+ * by the sense data. This makes enqueueing of the request
+ * easier.
+ *
+ * PARAMETER
+ * sense sense data of the actual error
+ * erp pointer to the currently created ERP
+ *
+ * RETURN VALUES
+ * erp modified ERP pointer
+ *
+ */
+static void
+dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense)
+{
+
+ switch (sense[25] & 0x03) {
+ case 0x00: /* no not retry */
+ erp->retries = 1;
+ break;
+
+ case 0x01: /* retry 2 times */
+ erp->retries = 2;
+ break;
+
+ case 0x02: /* retry 10 times */
+ erp->retries = 10;
+ break;
+
+ case 0x03: /* retry 256 times */
+ erp->retries = 256;
+ break;
+
+ default:
+ BUG();
+ }
+
+ erp->function = dasd_3990_erp_compound_retry;
+
+} /* end dasd_3990_erp_compound_retry */
+
+/*
+ * DASD_3990_ERP_COMPOUND_PATH
+ *
+ * DESCRIPTION
+ * Handles the compound ERP action for retry on alternate
+ * channel path.
+ *
+ * PARAMETER
+ * sense sense data of the actual error
+ * erp pointer to the currently created ERP
+ *
+ * RETURN VALUES
+ * erp modified ERP pointer
+ *
+ */
+static void
+dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense)
+{
+
+ if (sense[25] & DASD_SENSE_BIT_3) {
+ dasd_3990_erp_alternate_path(erp);
+
+ if (erp->status == DASD_CQR_FAILED) {
+ /* reset the lpm and the status to be able to
+ * try further actions. */
+
+ erp->lpm = 0;
+
+ erp->status = DASD_CQR_ERROR;
+
+ }
+ }
+
+ erp->function = dasd_3990_erp_compound_path;
+
+} /* end dasd_3990_erp_compound_path */
+
+/*
+ * DASD_3990_ERP_COMPOUND_CODE
+ *
+ * DESCRIPTION
+ * Handles the compound ERP action for retry code.
+ *
+ * PARAMETER
+ * sense sense data of the actual error
+ * erp pointer to the currently created ERP
+ *
+ * RETURN VALUES
+ * erp NEW ERP pointer
+ *
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense)
+{
+
+ if (sense[25] & DASD_SENSE_BIT_2) {
+
+ switch (sense[28]) {
+ case 0x17:
+ /* issue a Diagnostic Control command with an
+ * Inhibit Write subcommand and controler modifier */
+ erp = dasd_3990_erp_DCTL(erp, 0x20);
+ break;
+
+ case 0x25:
+ /* wait for 5 seconds and retry again */
+ erp->retries = 1;
+
+ dasd_3990_erp_block_queue (erp, 5*HZ);
+ break;
+
+ default:
+ /* should not happen - continue */
+ break;
+ }
+ }
+
+ erp->function = dasd_3990_erp_compound_code;
+
+ return erp;
+
+} /* end dasd_3990_erp_compound_code */
+
+/*
+ * DASD_3990_ERP_COMPOUND_CONFIG
+ *
+ * DESCRIPTION
+ * Handles the compound ERP action for configruation
+ * dependent error.
+ * Note: duplex handling is not implemented (yet).
+ *
+ * PARAMETER
+ * sense sense data of the actual error
+ * erp pointer to the currently created ERP
+ *
+ * RETURN VALUES
+ * erp modified ERP pointer
+ *
+ */
+static void
+dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense)
+{
+
+ if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) {
+
+ /* set to suspended duplex state then restart */
+ struct dasd_device *device = erp->device;
+
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "Set device to suspended duplex state should be "
+ "done!\n"
+ "This is not implemented yet (for compound ERP)"
+ " - please report to linux390@de.ibm.com");
+
+ }
+
+ erp->function = dasd_3990_erp_compound_config;
+
+} /* end dasd_3990_erp_compound_config */
+
+/*
+ * DASD_3990_ERP_COMPOUND
+ *
+ * DESCRIPTION
+ * Does the further compound program action if
+ * compound retry was not successful.
+ *
+ * PARAMETER
+ * sense sense data of the actual error
+ * erp pointer to the current (failed) ERP
+ *
+ * RETURN VALUES
+ * erp (additional) ERP pointer
+ *
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense)
+{
+
+ if ((erp->function == dasd_3990_erp_compound_retry) &&
+ (erp->status == DASD_CQR_ERROR)) {
+
+ dasd_3990_erp_compound_path(erp, sense);
+ }
+
+ if ((erp->function == dasd_3990_erp_compound_path) &&
+ (erp->status == DASD_CQR_ERROR)) {
+
+ erp = dasd_3990_erp_compound_code(erp, sense);
+ }
+
+ if ((erp->function == dasd_3990_erp_compound_code) &&
+ (erp->status == DASD_CQR_ERROR)) {
+
+ dasd_3990_erp_compound_config(erp, sense);
+ }
+
+ /* if no compound action ERP specified, the request failed */
+ if (erp->status == DASD_CQR_ERROR) {
+
+ erp->status = DASD_CQR_FAILED;
+ }
+
+ return erp;
+
+} /* end dasd_3990_erp_compound */
+
+/*
+ * DASD_3990_ERP_INSPECT_32
+ *
+ * DESCRIPTION
+ * Does a detailed inspection of the 32 byte sense data
+ * and sets up a related error recovery action.
+ *
+ * PARAMETER
+ * sense sense data of the actual error
+ * erp pointer to the currently created default ERP
+ *
+ * RETURN VALUES
+ * erp_filled pointer to the ERP
+ *
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense)
+{
+
+ struct dasd_device *device = erp->device;
+
+ erp->function = dasd_3990_erp_inspect_32;
+
+ if (sense[25] & DASD_SENSE_BIT_0) {
+
+ /* compound program action codes (byte25 bit 0 == '1') */
+ dasd_3990_erp_compound_retry(erp, sense);
+
+ } else {
+
+ /* single program action codes (byte25 bit 0 == '0') */
+ switch (sense[25]) {
+
+ case 0x00: /* success - use default ERP for retries */
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "ERP called for successful request"
+ " - just retry");
+ break;
+
+ case 0x01: /* fatal error */
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "Fatal error should have been "
+ "handled within the interrupt handler");
+
+ erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
+ break;
+
+ case 0x02: /* intervention required */
+ case 0x03: /* intervention required during dual copy */
+ erp = dasd_3990_erp_int_req(erp);
+ break;
+
+ case 0x0F: /* length mismatch during update write command */
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "update write command error - should not "
+ "happen;\n"
+ "Please send this message together with "
+ "the above sense data to linux390@de."
+ "ibm.com");
+
+ erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
+ break;
+
+ case 0x10: /* logging required for other channel program */
+ erp = dasd_3990_erp_action_10_32(erp, sense);
+ break;
+
+ case 0x15: /* next track outside defined extend */
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "next track outside defined extend - "
+ "should not happen;\n"
+ "Please send this message together with "
+ "the above sense data to linux390@de."
+ "ibm.com");
+
+ erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
+ break;
+
+ case 0x1B: /* unexpected condition during write */
+
+ erp = dasd_3990_erp_action_1B_32(erp, sense);
+ break;
+
+ case 0x1C: /* invalid data */
+ DEV_MESSAGE(KERN_EMERG, device, "%s",
+ "Data recovered during retry with PCI "
+ "fetch mode active");
+
+ /* not possible to handle this situation in Linux */
+ panic
+ ("Invalid data - No way to inform application "
+ "about the possibly incorrect data");
+ break;
+
+ case 0x1D: /* state-change pending */
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "A State change pending condition exists "
+ "for the subsystem or device");
+
+ erp = dasd_3990_erp_action_4(erp, sense);
+ break;
+
+ case 0x1E: /* busy */
+ DEV_MESSAGE(KERN_DEBUG, device, "%s",
+ "Busy condition exists "
+ "for the subsystem or device");
+ erp = dasd_3990_erp_action_4(erp, sense);
+ break;
+
+ default: /* all others errors - default erp */
+ break;
+ }
+ }
+
+ return erp;
+
+} /* end dasd_3990_erp_inspect_32 */
+
+/*
+ *****************************************************************************
+ * main ERP control fuctions (24 and 32 byte sense)
+ *****************************************************************************
+ */
+
+/*
+ * DASD_3990_ERP_INSPECT
+ *
+ * DESCRIPTION
+ * Does a detailed inspection for sense data by calling either
+ * the 24-byte or the 32-byte inspection routine.
+ *
+ * PARAMETER
+ * erp pointer to the currently created default ERP
+ * RETURN VALUES
+ * erp_new contens was possibly modified
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_inspect(struct dasd_ccw_req * erp)
+{
+
+ struct dasd_ccw_req *erp_new = NULL;
+ /* sense data are located in the refers record of the */
+ /* already set up new ERP ! */
+ char *sense = erp->refers->irb.ecw;
+
+ /* distinguish between 24 and 32 byte sense data */
+ if (sense[27] & DASD_SENSE_BIT_0) {
+
+ /* inspect the 24 byte sense data */
+ erp_new = dasd_3990_erp_inspect_24(erp, sense);
+
+ } else {
+
+ /* inspect the 32 byte sense data */
+ erp_new = dasd_3990_erp_inspect_32(erp, sense);
+
+ } /* end distinguish between 24 and 32 byte sense data */
+
+ return erp_new;
+}
+
+/*
+ * DASD_3990_ERP_ADD_ERP
+ *
+ * DESCRIPTION
+ * This funtion adds an additional request block (ERP) to the head of
+ * the given cqr (or erp).
+ * This erp is initialized as an default erp (retry TIC)
+ *
+ * PARAMETER
+ * cqr head of the current ERP-chain (or single cqr if
+ * first error)
+ * RETURN VALUES
+ * erp pointer to new ERP-chain head
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_add_erp(struct dasd_ccw_req * cqr)
+{
+
+ struct dasd_device *device = cqr->device;
+ struct ccw1 *ccw;
+
+ /* allocate additional request block */
+ struct dasd_ccw_req *erp;
+
+ erp = dasd_alloc_erp_request((char *) &cqr->magic, 2, 0, cqr->device);
+ if (IS_ERR(erp)) {
+ if (cqr->retries <= 0) {
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "Unable to allocate ERP request");
+ cqr->status = DASD_CQR_FAILED;
+ cqr->stopclk = get_clock ();
+ } else {
+ DEV_MESSAGE (KERN_ERR, device,
+ "Unable to allocate ERP request "
+ "(%i retries left)",
+ cqr->retries);
+ dasd_set_timer(device, (HZ << 3));
+ }
+ return cqr;
+ }
+
+ /* initialize request with default TIC to current ERP/CQR */
+ ccw = erp->cpaddr;
+ ccw->cmd_code = CCW_CMD_NOOP;
+ ccw->flags = CCW_FLAG_CC;
+ ccw++;
+ ccw->cmd_code = CCW_CMD_TIC;
+ ccw->cda = (long)(cqr->cpaddr);
+ erp->function = dasd_3990_erp_add_erp;
+ erp->refers = cqr;
+ erp->device = cqr->device;
+ erp->magic = cqr->magic;
+ erp->expires = 0;
+ erp->retries = 256;
+ erp->buildclk = get_clock();
+
+ erp->status = DASD_CQR_FILLED;
+
+ return erp;
+}
+
+/*
+ * DASD_3990_ERP_ADDITIONAL_ERP
+ *
+ * DESCRIPTION
+ * An additional ERP is needed to handle the current error.
+ * Add ERP to the head of the ERP-chain containing the ERP processing
+ * determined based on the sense data.
+ *
+ * PARAMETER
+ * cqr head of the current ERP-chain (or single cqr if
+ * first error)
+ *
+ * RETURN VALUES
+ * erp pointer to new ERP-chain head
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr)
+{
+
+ struct dasd_ccw_req *erp = NULL;
+
+ /* add erp and initialize with default TIC */
+ erp = dasd_3990_erp_add_erp(cqr);
+
+ /* inspect sense, determine specific ERP if possible */
+ if (erp != cqr) {
+
+ erp = dasd_3990_erp_inspect(erp);
+ }
+
+ return erp;
+
+} /* end dasd_3990_erp_additional_erp */
+
+/*
+ * DASD_3990_ERP_ERROR_MATCH
+ *
+ * DESCRIPTION
+ * Check if the device status of the given cqr is the same.
+ * This means that the failed CCW and the relevant sense data
+ * must match.
+ * I don't distinguish between 24 and 32 byte sense because in case of
+ * 24 byte sense byte 25 and 27 is set as well.
+ *
+ * PARAMETER
+ * cqr1 first cqr, which will be compared with the
+ * cqr2 second cqr.
+ *
+ * RETURN VALUES
+ * match 'boolean' for match found
+ * returns 1 if match found, otherwise 0.
+ */
+static int
+dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1, struct dasd_ccw_req *cqr2)
+{
+
+ /* check failed CCW */
+ if (cqr1->irb.scsw.cpa != cqr2->irb.scsw.cpa) {
+ // return 0; /* CCW doesn't match */
+ }
+
+ /* check sense data; byte 0-2,25,27 */
+ if (!((memcmp (cqr1->irb.ecw, cqr2->irb.ecw, 3) == 0) &&
+ (cqr1->irb.ecw[27] == cqr2->irb.ecw[27]) &&
+ (cqr1->irb.ecw[25] == cqr2->irb.ecw[25]))) {
+
+ return 0; /* sense doesn't match */
+ }
+
+ return 1; /* match */
+
+} /* end dasd_3990_erp_error_match */
+
+/*
+ * DASD_3990_ERP_IN_ERP
+ *
+ * DESCRIPTION
+ * check if the current error already happened before.
+ * quick exit if current cqr is not an ERP (cqr->refers=NULL)
+ *
+ * PARAMETER
+ * cqr failed cqr (either original cqr or already an erp)
+ *
+ * RETURN VALUES
+ * erp erp-pointer to the already defined error
+ * recovery procedure OR
+ * NULL if a 'new' error occurred.
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr)
+{
+
+ struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */
+ *erp_match = NULL; /* save erp chain head */
+ int match = 0; /* 'boolean' for matching error found */
+
+ if (cqr->refers == NULL) { /* return if not in erp */
+ return NULL;
+ }
+
+ /* check the erp/cqr chain for current error */
+ do {
+ match = dasd_3990_erp_error_match(erp_head, cqr->refers);
+ erp_match = cqr; /* save possible matching erp */
+ cqr = cqr->refers; /* check next erp/cqr in queue */
+
+ } while ((cqr->refers != NULL) && (!match));
+
+ if (!match) {
+ return NULL; /* no match was found */
+ }
+
+ return erp_match; /* return address of matching erp */
+
+} /* END dasd_3990_erp_in_erp */
+
+/*
+ * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense)
+ *
+ * DESCRIPTION
+ * No retry is left for the current ERP. Check what has to be done
+ * with the ERP.
+ * - do further defined ERP action or
+ * - wait for interrupt or
+ * - exit with permanent error
+ *
+ * PARAMETER
+ * erp ERP which is in progress with no retry left
+ *
+ * RETURN VALUES
+ * erp modified/additional ERP
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_further_erp(struct dasd_ccw_req *erp)
+{
+
+ struct dasd_device *device = erp->device;
+ char *sense = erp->irb.ecw;
+
+ /* check for 24 byte sense ERP */
+ if ((erp->function == dasd_3990_erp_bus_out) ||
+ (erp->function == dasd_3990_erp_action_1) ||
+ (erp->function == dasd_3990_erp_action_4)) {
+
+ erp = dasd_3990_erp_action_1(erp);
+
+ } else if (erp->function == dasd_3990_erp_action_5) {
+
+ /* retries have not been successful */
+ /* prepare erp for retry on different channel path */
+ erp = dasd_3990_erp_action_1(erp);
+
+ if (!(sense[2] & DASD_SENSE_BIT_0)) {
+
+ /* issue a Diagnostic Control command with an
+ * Inhibit Write subcommand */
+
+ switch (sense[25]) {
+ case 0x17:
+ case 0x57:{ /* controller */
+ erp = dasd_3990_erp_DCTL(erp, 0x20);
+ break;
+ }
+ case 0x18:
+ case 0x58:{ /* channel path */
+ erp = dasd_3990_erp_DCTL(erp, 0x40);
+ break;
+ }
+ case 0x19:
+ case 0x59:{ /* storage director */
+ erp = dasd_3990_erp_DCTL(erp, 0x80);
+ break;
+ }
+ default:
+ DEV_MESSAGE(KERN_DEBUG, device,
+ "invalid subcommand modifier 0x%x "
+ "for Diagnostic Control Command",
+ sense[25]);
+ }
+ }
+
+ /* check for 32 byte sense ERP */
+ } else if ((erp->function == dasd_3990_erp_compound_retry) ||
+ (erp->function == dasd_3990_erp_compound_path) ||
+ (erp->function == dasd_3990_erp_compound_code) ||
+ (erp->function == dasd_3990_erp_compound_config)) {
+
+ erp = dasd_3990_erp_compound(erp, sense);
+
+ } else {
+ /* No retry left and no additional special handling */
+ /*necessary */
+ DEV_MESSAGE(KERN_ERR, device,
+ "no retries left for erp %p - "
+ "set status to FAILED", erp);
+
+ erp->status = DASD_CQR_FAILED;
+ }
+
+ return erp;
+
+} /* end dasd_3990_erp_further_erp */
+
+/*
+ * DASD_3990_ERP_HANDLE_MATCH_ERP
+ *
+ * DESCRIPTION
+ * An error occurred again and an ERP has been detected which is already
+ * used to handle this error (e.g. retries).
+ * All prior ERP's are asumed to be successful and therefore removed
+ * from queue.
+ * If retry counter of matching erp is already 0, it is checked if further
+ * action is needed (besides retry) or if the ERP has failed.
+ *
+ * PARAMETER
+ * erp_head first ERP in ERP-chain
+ * erp ERP that handles the actual error.
+ * (matching erp)
+ *
+ * RETURN VALUES
+ * erp modified/additional ERP
+ */
+static struct dasd_ccw_req *
+dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head,
+ struct dasd_ccw_req *erp)
+{
+
+ struct dasd_device *device = erp_head->device;
+ struct dasd_ccw_req *erp_done = erp_head; /* finished req */
+ struct dasd_ccw_req *erp_free = NULL; /* req to be freed */
+
+ /* loop over successful ERPs and remove them from chanq */
+ while (erp_done != erp) {
+
+ if (erp_done == NULL) /* end of chain reached */
+ panic(PRINTK_HEADER "Programming error in ERP! The "
+ "original request was lost\n");
+
+ /* remove the request from the device queue */
+ list_del(&erp_done->list);
+
+ erp_free = erp_done;
+ erp_done = erp_done->refers;
+
+ /* free the finished erp request */
+ dasd_free_erp_request(erp_free, erp_free->device);
+
+ } /* end while */
+
+ if (erp->retries > 0) {
+
+ char *sense = erp->refers->irb.ecw;
+
+ /* check for special retries */
+ if (erp->function == dasd_3990_erp_action_4) {
+
+ erp = dasd_3990_erp_action_4(erp, sense);
+
+ } else if (erp->function == dasd_3990_erp_action_1B_32) {
+
+ erp = dasd_3990_update_1B(erp, sense);
+
+ } else if (erp->function == dasd_3990_erp_int_req) {
+
+ erp = dasd_3990_erp_int_req(erp);
+
+ } else {
+ /* simple retry */
+ DEV_MESSAGE(KERN_DEBUG, device,
+ "%i retries left for erp %p",
+ erp->retries, erp);
+
+ /* handle the request again... */
+ erp->status = DASD_CQR_QUEUED;
+ }
+
+ } else {
+ /* no retry left - check for further necessary action */
+ /* if no further actions, handle rest as permanent error */
+ erp = dasd_3990_erp_further_erp(erp);
+ }
+
+ return erp;
+
+} /* end dasd_3990_erp_handle_match_erp */
+
+/*
+ * DASD_3990_ERP_ACTION
+ *
+ * DESCRIPTION
+ * controll routine for 3990 erp actions.
+ * Has to be called with the queue lock (namely the s390_irq_lock) acquired.
+ *
+ * PARAMETER
+ * cqr failed cqr (either original cqr or already an erp)
+ *
+ * RETURN VALUES
+ * erp erp-pointer to the head of the ERP action chain.
+ * This means:
+ * - either a ptr to an additional ERP cqr or
+ * - the original given cqr (which's status might
+ * be modified)
+ */
+struct dasd_ccw_req *
+dasd_3990_erp_action(struct dasd_ccw_req * cqr)
+{
+
+ struct dasd_ccw_req *erp = NULL;
+ struct dasd_device *device = cqr->device;
+ __u32 cpa = cqr->irb.scsw.cpa;
+
+#ifdef ERP_DEBUG
+ /* print current erp_chain */
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "ERP chain at BEGINNING of ERP-ACTION");
+ {
+ struct dasd_ccw_req *temp_erp = NULL;
+
+ for (temp_erp = cqr;
+ temp_erp != NULL; temp_erp = temp_erp->refers) {
+
+ DEV_MESSAGE(KERN_ERR, device,
+ " erp %p (%02x) refers to %p",
+ temp_erp, temp_erp->status,
+ temp_erp->refers);
+ }
+ }
+#endif /* ERP_DEBUG */
+
+ /* double-check if current erp/cqr was successfull */
+ if ((cqr->irb.scsw.cstat == 0x00) &&
+ (cqr->irb.scsw.dstat == (DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
+
+ DEV_MESSAGE(KERN_DEBUG, device,
+ "ERP called for successful request %p"
+ " - NO ERP necessary", cqr);
+
+ cqr->status = DASD_CQR_DONE;
+
+ return cqr;
+ }
+ /* check if sense data are available */
+ if (!cqr->irb.ecw) {
+ DEV_MESSAGE(KERN_DEBUG, device,
+ "ERP called witout sense data avail ..."
+ "request %p - NO ERP possible", cqr);
+
+ cqr->status = DASD_CQR_FAILED;
+
+ return cqr;
+
+ }
+
+ /* check if error happened before */
+ erp = dasd_3990_erp_in_erp(cqr);
+
+ if (erp == NULL) {
+ /* no matching erp found - set up erp */
+ erp = dasd_3990_erp_additional_erp(cqr);
+ } else {
+ /* matching erp found - set all leading erp's to DONE */
+ erp = dasd_3990_erp_handle_match_erp(cqr, erp);
+ }
+
+#ifdef ERP_DEBUG
+ /* print current erp_chain */
+ DEV_MESSAGE(KERN_ERR, device, "%s", "ERP chain at END of ERP-ACTION");
+ {
+ struct dasd_ccw_req *temp_erp = NULL;
+ for (temp_erp = erp;
+ temp_erp != NULL; temp_erp = temp_erp->refers) {
+
+ DEV_MESSAGE(KERN_ERR, device,
+ " erp %p (%02x) refers to %p",
+ temp_erp, temp_erp->status,
+ temp_erp->refers);
+ }
+ }
+#endif /* ERP_DEBUG */
+
+ if (erp->status == DASD_CQR_FAILED)
+ dasd_log_ccw(erp, 1, cpa);
+
+ /* enqueue added ERP request */
+ if (erp->status == DASD_CQR_FILLED) {
+ erp->status = DASD_CQR_QUEUED;
+ list_add(&erp->list, &device->ccw_queue);
+ }
+
+ return erp;
+
+} /* end dasd_3990_erp_action */
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only. This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-indent-level: 4
+ * c-brace-imaginary-offset: 0
+ * c-brace-offset: -4
+ * c-argdecl-indent: 4
+ * c-label-offset: -4
+ * c-continued-statement-offset: 4
+ * c-continued-brace-offset: 0
+ * indent-tabs-mode: 1
+ * tab-width: 8
+ * End:
+ */