--- /dev/null
+/*
+ * Author(s)......: Horst Hummel <Horst.Hummel@de.ibm.com>
+ * Holger Smolinski <Holger.Smolinski@de.ibm.com>
+ * Bugreports.to..: <Linux390@de.ibm.com>
+ * Copyright IBM Corp. 2000, 2001
+ *
+ */
+
+#define KMSG_COMPONENT "dasd-eckd"
+
+#include <linux/timer.h>
+#include <asm/idals.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 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->memdev);
+ 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->startdev;
+ unsigned long flags;
+
+ DBF_DEV_EVENT(DBF_INFO, device,
+ "blocking request queue for %is", expires/HZ);
+
+ spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
+ dasd_device_set_stop_bits(device, DASD_STOPPED_PENDING);
+ spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
+ erp->status = DASD_CQR_FILLED;
+ if (erp->block)
+ dasd_block_set_timer(erp->block, expires);
+ else
+ dasd_device_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->startdev;
+
+ /* 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_err(&device->cdev->dev,
+ "is offline or not installed - "
+ "INTERVENTION REQUIRED!!\n");
+
+ 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->startdev;
+ __u8 opm;
+ unsigned long flags;
+
+ /* try alternate valid path */
+ spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
+ opm = ccw_device_get_path_mask(device->cdev);
+ spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
+ if (erp->lpm == 0)
+ erp->lpm = device->path_data.opm &
+ ~(erp->irb.esw.esw0.sublog.lpum);
+ else
+ erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum);
+
+ if ((erp->lpm & opm) != 0x00) {
+
+ DBF_DEV_EVENT(DBF_WARNING, device,
+ "try alternate lpm=%x (lpum=%x / opm=%x)",
+ erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm);
+
+ /* reset status to submit the request again... */
+ erp->status = DASD_CQR_FILLED;
+ erp->retries = 10;
+ } else {
+ dev_err(&device->cdev->dev,
+ "The DASD cannot be reached on any path (lpum=%x"
+ "/opm=%x)\n", erp->irb.esw.esw0.sublog.lpum, opm);
+
+ /* post request with permanent error */
+ 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->startdev;
+ 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),
+ device);
+ if (IS_ERR(dctl_cqr)) {
+ dev_err(&device->cdev->dev,
+ "Unable to allocate DCTL-CQR\n");
+ 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->flags = erp->flags;
+ dctl_cqr->function = dasd_3990_erp_DCTL;
+ dctl_cqr->refers = erp;
+ dctl_cqr->startdev = device;
+ dctl_cqr->memdev = device;
+ dctl_cqr->magic = erp->magic;
+ dctl_cqr->expires = 5 * 60 * HZ;
+ dctl_cqr->retries = 2;
+
+ dctl_cqr->buildclk = get_tod_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.
+ * As deviation from the recommended recovery action, we reset the path mask
+ * after we have tried each path and go through all paths a second time.
+ * This will cover situations where only one path at a time is actually down,
+ * but all paths fail and recover just with the same sequence and timing as
+ * we try to use them (flapping links).
+ * If all alternate paths have been tried twice, the request is posted with
+ * a permanent error.
+ *
+ * PARAMETER
+ * erp pointer to the current ERP
+ *
+ * RETURN VALUES
+ * erp pointer to the ERP
+ *
+ */
+static struct dasd_ccw_req *dasd_3990_erp_action_1_sec(struct dasd_ccw_req *erp)
+{
+ erp->function = dasd_3990_erp_action_1_sec;
+ dasd_3990_erp_alternate_path(erp);
+ return 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);
+ if (erp->status == DASD_CQR_FAILED &&
+ !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) {
+ erp->status = DASD_CQR_FILLED;
+ erp->retries = 10;
+ erp->lpm = erp->startdev->path_data.opm;
+ erp->function = dasd_3990_erp_action_1_sec;
+ }
+ return erp;
+} /* end dasd_3990_erp_action_1(b) */
+
+/*
+ * 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->startdev;
+
+ /* 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) {
+
+ DBF_DEV_EVENT(DBF_INFO, device, "%s",
+ "dasd_3990_erp_action_4: first time retry");
+
+ erp->retries = 256;
+ erp->function = dasd_3990_erp_action_4;
+
+ } else {
+ if (sense && (sense[25] == 0x1D)) { /* state change pending */
+
+ DBF_DEV_EVENT(DBF_INFO, device,
+ "waiting for state change pending "
+ "interrupt, %d retries left",
+ erp->retries);
+
+ dasd_3990_erp_block_queue(erp, 30*HZ);
+
+ } else if (sense && (sense[25] == 0x1E)) { /* busy */
+ DBF_DEV_EVENT(DBF_INFO, device,
+ "busy - redriving request later, "
+ "%d retries left",
+ erp->retries);
+ dasd_3990_erp_block_queue(erp, HZ);
+ } else {
+ /* no state change pending - retry */
+ DBF_DEV_EVENT(DBF_INFO, device,
+ "redriving request immediately, "
+ "%d retries left",
+ erp->retries);
+ erp->status = DASD_CQR_FILLED;
+ }
+ }
+
+ 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->startdev;
+ char msg_format = (sense[7] & 0xF0);
+ char msg_no = (sense[7] & 0x0F);
+ char errorstring[ERRORLENGTH];
+
+ 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_warn(&device->cdev->dev,
+ "FORMAT 0 - Invalid Command\n");
+ break;
+ case 0x02:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Invalid Command "
+ "Sequence\n");
+ break;
+ case 0x03:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - CCW Count less than "
+ "required\n");
+ break;
+ case 0x04:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Invalid Parameter\n");
+ break;
+ case 0x05:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Diagnostic of Special"
+ " Command Violates File Mask\n");
+ break;
+ case 0x07:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Channel Returned with "
+ "Incorrect retry CCW\n");
+ break;
+ case 0x08:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Reset Notification\n");
+ break;
+ case 0x09:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Storage Path Restart\n");
+ break;
+ case 0x0A:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Channel requested "
+ "... %02x\n", sense[8]);
+ break;
+ case 0x0B:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Invalid Defective/"
+ "Alternate Track Pointer\n");
+ break;
+ case 0x0C:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - DPS Installation "
+ "Check\n");
+ break;
+ case 0x0E:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Command Invalid on "
+ "Secondary Address\n");
+ break;
+ case 0x0F:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Status Not As "
+ "Required: reason %02x\n",
+ sense[8]);
+ break;
+ default:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Reserved\n");
+ }
+ } else {
+ switch (msg_no) {
+ case 0x00: /* No Message */
+ break;
+ case 0x01:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Device Error "
+ "Source\n");
+ break;
+ case 0x02:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Reserved\n");
+ break;
+ case 0x03:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Device Fenced - "
+ "device = %02x\n", sense[4]);
+ break;
+ case 0x04:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Data Pinned for "
+ "Device\n");
+ break;
+ default:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 0 - Reserved\n");
+ }
+ }
+ break;
+
+ case 0x10: /* Format 1 - Device Equipment Checks */
+ switch (msg_no) {
+ case 0x00: /* No Message */
+ break;
+ case 0x01:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 1 - Device Status 1 not as "
+ "expected\n");
+ break;
+ case 0x03:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 1 - Index missing\n");
+ break;
+ case 0x04:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 1 - Interruption cannot be "
+ "reset\n");
+ break;
+ case 0x05:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 1 - Device did not respond to "
+ "selection\n");
+ break;
+ case 0x06:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 1 - Device check-2 error or Set "
+ "Sector is not complete\n");
+ break;
+ case 0x07:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 1 - Head address does not "
+ "compare\n");
+ break;
+ case 0x08:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 1 - Device status 1 not valid\n");
+ break;
+ case 0x09:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 1 - Device not ready\n");
+ break;
+ case 0x0A:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 1 - Track physical address did "
+ "not compare\n");
+ break;
+ case 0x0B:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 1 - Missing device address bit\n");
+ break;
+ case 0x0C:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 1 - Drive motor switch is off\n");
+ break;
+ case 0x0D:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 1 - Seek incomplete\n");
+ break;
+ case 0x0E:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 1 - Cylinder address did not "
+ "compare\n");
+ break;
+ case 0x0F:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 1 - Offset active cannot be "
+ "reset\n");
+ break;
+ default:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 1 - Reserved\n");
+ }
+ break;
+
+ case 0x20: /* Format 2 - 3990 Equipment Checks */
+ switch (msg_no) {
+ case 0x08:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 2 - 3990 check-2 error\n");
+ break;
+ case 0x0E:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 2 - Support facility errors\n");
+ break;
+ case 0x0F:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 2 - Microcode detected error "
+ "%02x\n",
+ sense[8]);
+ break;
+ default:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 2 - Reserved\n");
+ }
+ break;
+
+ case 0x30: /* Format 3 - 3990 Control Checks */
+ switch (msg_no) {
+ case 0x0F:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 3 - Allegiance terminated\n");
+ break;
+ default:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 3 - Reserved\n");
+ }
+ break;
+
+ case 0x40: /* Format 4 - Data Checks */
+ switch (msg_no) {
+ case 0x00:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - Home address area error\n");
+ break;
+ case 0x01:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - Count area error\n");
+ break;
+ case 0x02:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - Key area error\n");
+ break;
+ case 0x03:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - Data area error\n");
+ break;
+ case 0x04:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - No sync byte in home address "
+ "area\n");
+ break;
+ case 0x05:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - No sync byte in count address "
+ "area\n");
+ break;
+ case 0x06:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - No sync byte in key area\n");
+ break;
+ case 0x07:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - No sync byte in data area\n");
+ break;
+ case 0x08:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - Home address area error; "
+ "offset active\n");
+ break;
+ case 0x09:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - Count area error; offset "
+ "active\n");
+ break;
+ case 0x0A:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - Key area error; offset "
+ "active\n");
+ break;
+ case 0x0B:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - Data area error; "
+ "offset active\n");
+ break;
+ case 0x0C:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - No sync byte in home "
+ "address area; offset active\n");
+ break;
+ case 0x0D:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - No syn byte in count "
+ "address area; offset active\n");
+ break;
+ case 0x0E:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - No sync byte in key area; "
+ "offset active\n");
+ break;
+ case 0x0F:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - No syn byte in data area; "
+ "offset active\n");
+ break;
+ default:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 4 - Reserved\n");
+ }
+ break;
+
+ case 0x50: /* Format 5 - Data Check with displacement information */
+ switch (msg_no) {
+ case 0x00:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 5 - Data Check in the "
+ "home address area\n");
+ break;
+ case 0x01:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 5 - Data Check in the count "
+ "area\n");
+ break;
+ case 0x02:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 5 - Data Check in the key area\n");
+ break;
+ case 0x03:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 5 - Data Check in the data "
+ "area\n");
+ break;
+ case 0x08:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 5 - Data Check in the "
+ "home address area; offset active\n");
+ break;
+ case 0x09:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 5 - Data Check in the count area; "
+ "offset active\n");
+ break;
+ case 0x0A:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 5 - Data Check in the key area; "
+ "offset active\n");
+ break;
+ case 0x0B:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 5 - Data Check in the data area; "
+ "offset active\n");
+ break;
+ default:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 5 - Reserved\n");
+ }
+ break;
+
+ case 0x60: /* Format 6 - Usage Statistics/Overrun Errors */
+ switch (msg_no) {
+ case 0x00:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 6 - Overrun on channel A\n");
+ break;
+ case 0x01:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 6 - Overrun on channel B\n");
+ break;
+ case 0x02:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 6 - Overrun on channel C\n");
+ break;
+ case 0x03:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 6 - Overrun on channel D\n");
+ break;
+ case 0x04:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 6 - Overrun on channel E\n");
+ break;
+ case 0x05:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 6 - Overrun on channel F\n");
+ break;
+ case 0x06:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 6 - Overrun on channel G\n");
+ break;
+ case 0x07:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 6 - Overrun on channel H\n");
+ break;
+ default:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 6 - Reserved\n");
+ }
+ break;
+
+ case 0x70: /* Format 7 - Device Connection Control Checks */
+ switch (msg_no) {
+ case 0x00:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 7 - RCC initiated by a connection "
+ "check alert\n");
+ break;
+ case 0x01:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 7 - RCC 1 sequence not "
+ "successful\n");
+ break;
+ case 0x02:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 7 - RCC 1 and RCC 2 sequences not "
+ "successful\n");
+ break;
+ case 0x03:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 7 - Invalid tag-in during "
+ "selection sequence\n");
+ break;
+ case 0x04:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 7 - extra RCC required\n");
+ break;
+ case 0x05:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 7 - Invalid DCC selection "
+ "response or timeout\n");
+ break;
+ case 0x06:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 7 - Missing end operation; device "
+ "transfer complete\n");
+ break;
+ case 0x07:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 7 - Missing end operation; device "
+ "transfer incomplete\n");
+ break;
+ case 0x08:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 7 - Invalid tag-in for an "
+ "immediate command sequence\n");
+ break;
+ case 0x09:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 7 - Invalid tag-in for an "
+ "extended command sequence\n");
+ break;
+ case 0x0A:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 7 - 3990 microcode time out when "
+ "stopping selection\n");
+ break;
+ case 0x0B:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 7 - No response to selection "
+ "after a poll interruption\n");
+ break;
+ case 0x0C:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 7 - Permanent path error (DASD "
+ "controller not available)\n");
+ break;
+ case 0x0D:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 7 - DASD controller not available"
+ " on disconnected command chain\n");
+ break;
+ default:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 7 - Reserved\n");
+ }
+ break;
+
+ case 0x80: /* Format 8 - Additional Device Equipment Checks */
+ switch (msg_no) {
+ case 0x00: /* No Message */
+ case 0x01:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 8 - Error correction code "
+ "hardware fault\n");
+ break;
+ case 0x03:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 8 - Unexpected end operation "
+ "response code\n");
+ break;
+ case 0x04:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 8 - End operation with transfer "
+ "count not zero\n");
+ break;
+ case 0x05:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 8 - End operation with transfer "
+ "count zero\n");
+ break;
+ case 0x06:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 8 - DPS checks after a system "
+ "reset or selective reset\n");
+ break;
+ case 0x07:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 8 - DPS cannot be filled\n");
+ break;
+ case 0x08:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 8 - Short busy time-out during "
+ "device selection\n");
+ break;
+ case 0x09:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 8 - DASD controller failed to "
+ "set or reset the long busy latch\n");
+ break;
+ case 0x0A:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 8 - No interruption from device "
+ "during a command chain\n");
+ break;
+ default:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 8 - Reserved\n");
+ }
+ break;
+
+ case 0x90: /* Format 9 - Device Read, Write, and Seek Checks */
+ switch (msg_no) {
+ case 0x00:
+ break; /* No Message */
+ case 0x06:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 9 - Device check-2 error\n");
+ break;
+ case 0x07:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 9 - Head address did not "
+ "compare\n");
+ break;
+ case 0x0A:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 9 - Track physical address did "
+ "not compare while oriented\n");
+ break;
+ case 0x0E:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 9 - Cylinder address did not "
+ "compare\n");
+ break;
+ default:
+ dev_warn(&device->cdev->dev,
+ "FORMAT 9 - Reserved\n");
+ }
+ break;
+
+ case 0xF0: /* Format F - Cache Storage Checks */
+ switch (msg_no) {
+ case 0x00:
+ dev_warn(&device->cdev->dev,
+ "FORMAT F - Operation Terminated\n");
+ break;
+ case 0x01:
+ dev_warn(&device->cdev->dev,
+ "FORMAT F - Subsystem Processing Error\n");
+ break;
+ case 0x02:
+ dev_warn(&device->cdev->dev,
+ "FORMAT F - Cache or nonvolatile storage "
+ "equipment failure\n");
+ break;
+ case 0x04:
+ dev_warn(&device->cdev->dev,
+ "FORMAT F - Caching terminated\n");
+ break;
+ case 0x06:
+ dev_warn(&device->cdev->dev,
+ "FORMAT F - Cache fast write access not "
+ "authorized\n");
+ break;
+ case 0x07:
+ dev_warn(&device->cdev->dev,
+ "FORMAT F - Track format incorrect\n");
+ break;
+ case 0x09:
+ dev_warn(&device->cdev->dev,
+ "FORMAT F - Caching reinitiated\n");
+ break;
+ case 0x0A:
+ dev_warn(&device->cdev->dev,
+ "FORMAT F - Nonvolatile storage "
+ "terminated\n");
+ break;
+ case 0x0B:
+ dev_warn(&device->cdev->dev,
+ "FORMAT F - Volume is suspended duplex\n");
+ /* call extended error reporting (EER) */
+ dasd_eer_write(device, erp->refers,
+ DASD_EER_PPRCSUSPEND);
+ break;
+ case 0x0C:
+ dev_warn(&device->cdev->dev,
+ "FORMAT F - Subsystem status cannot be "
+ "determined\n");
+ break;
+ case 0x0D:
+ dev_warn(&device->cdev->dev,
+ "FORMAT F - Caching status reset to "
+ "default\n");
+ break;
+ case 0x0E:
+ dev_warn(&device->cdev->dev,
+ "FORMAT F - DASD Fast Write inhibited\n");
+ break;
+ default:
+ dev_warn(&device->cdev->dev,
+ "FORMAT D - Reserved\n");
+ }
+ break;
+
+ default: /* unknown message format - should not happen
+ internal error 03 - unknown message format */
+ snprintf(errorstring, ERRORLENGTH, "03 %x02", msg_format);
+ dev_err(&device->cdev->dev,
+ "An error occurred in the DASD device driver, "
+ "reason=%s\n", errorstring);
+ 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->startdev;
+
+ erp->function = dasd_3990_erp_com_rej;
+
+ /* env data present (ACTION 10 - retry should work) */
+ if (sense[2] & SNS2_ENV_DATA_PRESENT) {
+
+ DBF_DEV_EVENT(DBF_WARNING, device, "%s",
+ "Command Reject - environmental data present");
+
+ dasd_3990_handle_env_data(erp, sense);
+
+ erp->retries = 5;
+
+ } else if (sense[1] & SNS1_WRITE_INHIBITED) {
+ dev_err(&device->cdev->dev, "An I/O request was rejected"
+ " because writing is inhibited\n");
+ erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
+ } else {
+ /* fatal error - set status to FAILED
+ internal error 09 - Command Reject */
+ dev_err(&device->cdev->dev, "An error occurred in the DASD "
+ "device driver, reason=%s\n", "09");
+
+ 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->startdev;
+
+ /* 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 */
+ DBF_DEV_EVENT(DBF_WARNING, 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->startdev;
+
+ erp->function = dasd_3990_erp_equip_check;
+
+ if (sense[1] & SNS1_WRITE_INHIBITED) {
+ dev_info(&device->cdev->dev,
+ "Write inhibited path encountered\n");
+
+ /* vary path offline
+ internal error 04 - Path should be varied off-line.*/
+ dev_err(&device->cdev->dev, "An error occurred in the DASD "
+ "device driver, reason=%s\n", "04");
+
+ erp = dasd_3990_erp_action_1(erp);
+
+ } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
+
+ DBF_DEV_EVENT(DBF_WARNING, 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) {
+
+ DBF_DEV_EVENT(DBF_WARNING, 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 */
+ DBF_DEV_EVENT(DBF_WARNING, 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->startdev;
+
+ erp->function = dasd_3990_erp_data_check;
+
+ if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */
+
+ /* issue message that the data has been corrected */
+ dev_emerg(&device->cdev->dev,
+ "Data recovered during retry with PCI "
+ "fetch mode active\n");
+
+ /* 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) {
+
+ DBF_DEV_EVENT(DBF_WARNING, 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) {
+
+ DBF_DEV_EVENT(DBF_WARNING, device, "%s",
+ "Uncorrectable data check with internal "
+ "retry exhausted");
+
+ erp = dasd_3990_erp_action_1(erp);
+
+ } else {
+ /* all other data checks */
+ DBF_DEV_EVENT(DBF_WARNING, 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->startdev;
+
+ erp->function = dasd_3990_erp_overrun;
+
+ DBF_DEV_EVENT(DBF_WARNING, 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->startdev;
+
+ erp->function = dasd_3990_erp_inv_format;
+
+ if (sense[2] & SNS2_ENV_DATA_PRESENT) {
+
+ DBF_DEV_EVENT(DBF_WARNING, 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 {
+ /* internal error 06 - The track format is not valid*/
+ dev_err(&device->cdev->dev,
+ "An error occurred in the DASD device driver, "
+ "reason=%s\n", "06");
+
+ 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->startdev;
+
+ dev_err(&device->cdev->dev,
+ "The cylinder data for accessing the DASD is inconsistent\n");
+
+ /* 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->startdev;
+
+ erp->function = dasd_3990_erp_env_data;
+
+ DBF_DEV_EVENT(DBF_WARNING, 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->status = DASD_CQR_FILLED;
+ }
+
+ 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->startdev;
+
+ dev_err(&device->cdev->dev,
+ "The specified record was not found\n");
+
+ 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->startdev;
+
+ dev_err(&device->cdev->dev, "Accessing the DASD failed because of "
+ "a hardware error\n");
+
+ return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
+
+} /* end dasd_3990_erp_file_prot */
+
+/*
+ * DASD_3990_ERP_INSPECT_ALIAS
+ *
+ * DESCRIPTION
+ * Checks if the original request was started on an alias device.
+ * If yes, it modifies the original and the erp request so that
+ * the erp request can be started on a base device.
+ *
+ * PARAMETER
+ * erp pointer to the currently created default ERP
+ *
+ * RETURN VALUES
+ * erp pointer to the modified ERP, or NULL
+ */
+
+static struct dasd_ccw_req *dasd_3990_erp_inspect_alias(
+ struct dasd_ccw_req *erp)
+{
+ struct dasd_ccw_req *cqr = erp->refers;
+ char *sense;
+
+ if (cqr->block &&
+ (cqr->block->base != cqr->startdev)) {
+
+ sense = dasd_get_sense(&erp->refers->irb);
+ /*
+ * dynamic pav may have changed base alias mapping
+ */
+ if (!test_bit(DASD_FLAG_OFFLINE, &cqr->startdev->flags) && sense
+ && (sense[0] == 0x10) && (sense[7] == 0x0F)
+ && (sense[8] == 0x67)) {
+ /*
+ * remove device from alias handling to prevent new
+ * requests from being scheduled on the
+ * wrong alias device
+ */
+ dasd_alias_remove_device(cqr->startdev);
+
+ /* schedule worker to reload device */
+ dasd_reload_device(cqr->startdev);
+ }
+
+ if (cqr->startdev->features & DASD_FEATURE_ERPLOG) {
+ DBF_DEV_EVENT(DBF_ERR, cqr->startdev,
+ "ERP on alias device for request %p,"
+ " recover on base device %s", cqr,
+ dev_name(&cqr->block->base->cdev->dev));
+ }
+ dasd_eckd_reset_ccw_to_base_io(cqr);
+ erp->startdev = cqr->block->base;
+ erp->function = dasd_3990_erp_inspect_alias;
+ return erp;
+ } else
+ return NULL;
+}
+
+
+/*
+ * 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->startdev;
+
+ erp->retries = 256;
+ erp->function = dasd_3990_erp_action_10_32;
+
+ DBF_DEV_EVENT(DBF_WARNING, 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->startdev;
+ __u32 cpa = 0;
+ struct dasd_ccw_req *cqr;
+ struct dasd_ccw_req *erp;
+ struct DE_eckd_data *DE_data;
+ struct PFX_eckd_data *PFX_data;
+ char *LO_data; /* LO_eckd_data_t */
+ struct ccw1 *ccw, *oldccw;
+
+ DBF_DEV_EVENT(DBF_WARNING, 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;
+ }
+
+ if (scsw_is_tm(&cqr->irb.scsw)) {
+ DBF_DEV_EVENT(DBF_WARNING, device, "%s",
+ "32 bit sense, action 1B is not defined"
+ " in transport mode - just retry");
+ return default_erp;
+ }
+
+ /* for imprecise ending just do default erp */
+ if (sense[1] & 0x01) {
+ DBF_DEV_EVENT(DBF_WARNING, 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.cmd.cpa;
+
+ if (cpa == 0) {
+ DBF_DEV_EVENT(DBF_WARNING, 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)) {
+ /* internal error 01 - Unable to allocate ERP */
+ dev_err(&device->cdev->dev, "An error occurred in the DASD "
+ "device driver, reason=%s\n", "01");
+ return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
+ }
+
+ /* use original DE */
+ DE_data = erp->data;
+ oldccw = cqr->cpaddr;
+ if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) {
+ PFX_data = cqr->data;
+ memcpy(DE_data, &PFX_data->define_extent,
+ sizeof(struct DE_eckd_data));
+ } else
+ 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)) {
+ /* should not */
+ 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->flags = default_erp->flags;
+ erp->function = dasd_3990_erp_action_1B_32;
+ erp->refers = default_erp->refers;
+ erp->startdev = device;
+ erp->memdev = device;
+ erp->magic = default_erp->magic;
+ erp->expires = default_erp->expires;
+ erp->retries = 256;
+ erp->buildclk = get_tod_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->startdev;
+ __u32 cpa = 0;
+ struct dasd_ccw_req *cqr;
+ struct dasd_ccw_req *erp;
+ char *LO_data; /* struct LO_eckd_data */
+ struct ccw1 *ccw;
+
+ DBF_DEV_EVENT(DBF_WARNING, 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;
+ }
+
+ if (scsw_is_tm(&cqr->irb.scsw)) {
+ DBF_DEV_EVENT(DBF_WARNING, device, "%s",
+ "32 bit sense, action 1B, update,"
+ " in transport mode - just retry");
+ return previous_erp;
+ }
+
+ /* for imprecise ending just do default erp */
+ if (sense[1] & 0x01) {
+ DBF_DEV_EVENT(DBF_WARNING, device, "%s",
+ "Imprecise ending is set - just retry");
+
+ previous_erp->status = DASD_CQR_FILLED;
+
+ 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.cmd.cpa;
+
+ if (cpa == 0) {
+ /* internal error 02 -
+ Unable to determine address of the CCW to be restarted */
+ dev_err(&device->cdev->dev, "An error occurred in the DASD "
+ "device driver, reason=%s\n", "02");
+
+ 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)) {
+ /* 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_FILLED;
+
+ 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 &&
+ !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) {
+ /* reset the lpm and the status to be able to
+ * try further actions. */
+ erp->lpm = erp->startdev->path_data.opm;
+ erp->status = DASD_CQR_NEED_ERP;
+ }
+ }
+
+ 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 controller 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
+ internal error 05 - Set device to suspended duplex state
+ should be done */
+ struct dasd_device *device = erp->startdev;
+ dev_err(&device->cdev->dev,
+ "An error occurred in the DASD device driver, "
+ "reason=%s\n", "05");
+
+ }
+
+ 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_NEED_ERP)) {
+
+ dasd_3990_erp_compound_path(erp, sense);
+ }
+
+ if ((erp->function == dasd_3990_erp_compound_path) &&
+ (erp->status == DASD_CQR_NEED_ERP)) {
+
+ erp = dasd_3990_erp_compound_code(erp, sense);
+ }
+
+ if ((erp->function == dasd_3990_erp_compound_code) &&
+ (erp->status == DASD_CQR_NEED_ERP)) {
+
+ dasd_3990_erp_compound_config(erp, sense);
+ }
+
+ /* if no compound action ERP specified, the request failed */
+ if (erp->status == DASD_CQR_NEED_ERP)
+ erp->status = DASD_CQR_FAILED;
+
+ return erp;
+
+} /* end dasd_3990_erp_compound */
+
+/*
+ *DASD_3990_ERP_HANDLE_SIM
+ *
+ *DESCRIPTION
+ * inspects the SIM SENSE data and starts an appropriate action
+ *
+ * PARAMETER
+ * sense sense data of the actual error
+ *
+ * RETURN VALUES
+ * none
+ */
+void
+dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense)
+{
+ /* print message according to log or message to operator mode */
+ if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) {
+ /* print SIM SRC from RefCode */
+ dev_err(&device->cdev->dev, "SIM - SRC: "
+ "%02x%02x%02x%02x\n", sense[22],
+ sense[23], sense[11], sense[12]);
+ } else if (sense[24] & DASD_SIM_LOG) {
+ /* print SIM SRC Refcode */
+ dev_warn(&device->cdev->dev, "log SIM - SRC: "
+ "%02x%02x%02x%02x\n", sense[22],
+ sense[23], sense[11], sense[12]);
+ }
+}
+
+/*
+ * 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->startdev;
+
+ erp->function = dasd_3990_erp_inspect_32;
+
+ /* check for SIM sense data */
+ if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)
+ dasd_3990_erp_handle_sim(device, sense);
+
+ 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 */
+ DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
+ "ERP called for successful request"
+ " - just retry");
+ break;
+
+ case 0x01: /* fatal error */
+ dev_err(&device->cdev->dev,
+ "ERP failed for the DASD\n");
+
+ 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
+ internal error 08 - update write command error*/
+ dev_err(&device->cdev->dev, "An error occurred in the "
+ "DASD device driver, reason=%s\n", "08");
+
+ 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
+ internal error 07 - The next track is not
+ within the defined storage extent */
+ dev_err(&device->cdev->dev,
+ "An error occurred in the DASD device driver, "
+ "reason=%s\n", "07");
+
+ 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_emerg(&device->cdev->dev,
+ "Data recovered during retry with PCI "
+ "fetch mode active\n");
+
+ /* 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 */
+ DBF_DEV_EVENT(DBF_WARNING, 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 */
+ DBF_DEV_EVENT(DBF_WARNING, 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 functions (24 and 32 byte sense)
+ *****************************************************************************
+ */
+
+/*
+ * DASD_3990_ERP_CONTROL_CHECK
+ *
+ * DESCRIPTION
+ * Does a generic inspection if a control check occurred and sets up
+ * the related error recovery procedure
+ *
+ * PARAMETER
+ * erp pointer to the currently created default ERP
+ *
+ * RETURN VALUES
+ * erp_filled pointer to the erp
+ */
+
+static struct dasd_ccw_req *
+dasd_3990_erp_control_check(struct dasd_ccw_req *erp)
+{
+ struct dasd_device *device = erp->startdev;
+
+ if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK
+ | SCHN_STAT_CHN_CTRL_CHK)) {
+ DBF_DEV_EVENT(DBF_WARNING, device, "%s",
+ "channel or interface control check");
+ erp = dasd_3990_erp_action_4(erp, NULL);
+ }
+ return erp;
+}
+
+/*
+ * 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;
+ char *sense;
+
+ /* if this problem occurred on an alias retry on base */
+ erp_new = dasd_3990_erp_inspect_alias(erp);
+ if (erp_new)
+ return erp_new;
+
+ /* sense data are located in the refers record of the
+ * already set up new ERP !
+ * check if concurrent sens is available
+ */
+ sense = dasd_get_sense(&erp->refers->irb);
+ if (!sense)
+ erp_new = dasd_3990_erp_control_check(erp);
+ /* distinguish between 24 and 32 byte sense data */
+ else 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 function adds an additional request block (ERP) to the head of
+ * the given cqr (or erp).
+ * For a command mode cqr the erp is initialized as an default erp
+ * (retry TIC).
+ * For transport mode we make a copy of the original TCW (points to
+ * the original TCCB, TIDALs, etc.) but give it a fresh
+ * TSB so the original sense data will not be changed.
+ *
+ * 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->startdev;
+ struct ccw1 *ccw;
+ struct dasd_ccw_req *erp;
+ int cplength, datasize;
+ struct tcw *tcw;
+ struct tsb *tsb;
+
+ if (cqr->cpmode == 1) {
+ cplength = 0;
+ /* TCW needs to be 64 byte aligned, so leave enough room */
+ datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb);
+ } else {
+ cplength = 2;
+ datasize = 0;
+ }
+
+ /* allocate additional request block */
+ erp = dasd_alloc_erp_request((char *) &cqr->magic,
+ cplength, datasize, device);
+ if (IS_ERR(erp)) {
+ if (cqr->retries <= 0) {
+ DBF_DEV_EVENT(DBF_ERR, device, "%s",
+ "Unable to allocate ERP request");
+ cqr->status = DASD_CQR_FAILED;
+ cqr->stopclk = get_tod_clock();
+ } else {
+ DBF_DEV_EVENT(DBF_ERR, device,
+ "Unable to allocate ERP request "
+ "(%i retries left)",
+ cqr->retries);
+ dasd_block_set_timer(device->block, (HZ << 3));
+ }
+ return erp;
+ }
+
+ ccw = cqr->cpaddr;
+ if (cqr->cpmode == 1) {
+ /* make a shallow copy of the original tcw but set new tsb */
+ erp->cpmode = 1;
+ erp->cpaddr = PTR_ALIGN(erp->data, 64);
+ tcw = erp->cpaddr;
+ tsb = (struct tsb *) &tcw[1];
+ *tcw = *((struct tcw *)cqr->cpaddr);
+ tcw->tsb = (long)tsb;
+ } else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) {
+ /* PSF cannot be chained from NOOP/TIC */
+ erp->cpaddr = cqr->cpaddr;
+ } else {
+ /* 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->flags = cqr->flags;
+ erp->function = dasd_3990_erp_add_erp;
+ erp->refers = cqr;
+ erp->startdev = device;
+ erp->memdev = device;
+ erp->block = cqr->block;
+ erp->magic = cqr->magic;
+ erp->expires = cqr->expires;
+ erp->retries = 256;
+ erp->buildclk = get_tod_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);
+
+ if (IS_ERR(erp))
+ return erp;
+
+ /* 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)
+{
+ char *sense1, *sense2;
+
+ if (cqr1->startdev != cqr2->startdev)
+ return 0;
+
+ sense1 = dasd_get_sense(&cqr1->irb);
+ sense2 = dasd_get_sense(&cqr2->irb);
+
+ /* one request has sense data, the other not -> no match, return 0 */
+ if (!sense1 != !sense2)
+ return 0;
+ /* no sense data in both cases -> check cstat for IFCC */
+ if (!sense1 && !sense2) {
+ if ((scsw_cstat(&cqr1->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK |
+ SCHN_STAT_CHN_CTRL_CHK)) ==
+ (scsw_cstat(&cqr2->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK |
+ SCHN_STAT_CHN_CTRL_CHK)))
+ return 1; /* match with ifcc*/
+ }
+ /* check sense data; byte 0-2,25,27 */
+ if (!(sense1 && sense2 &&
+ (memcmp(sense1, sense2, 3) == 0) &&
+ (sense1[27] == sense2[27]) &&
+ (sense1[25] == sense2[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->startdev;
+ char *sense = dasd_get_sense(&erp->irb);
+
+ /* 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_1_sec) {
+ erp = dasd_3990_erp_action_1_sec(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 && !(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:
+ DBF_DEV_EVENT(DBF_WARNING, device,
+ "invalid subcommand modifier 0x%x "
+ "for Diagnostic Control Command",
+ sense[25]);
+ }
+ }
+
+ /* check for 32 byte sense ERP */
+ } else if (sense &&
+ ((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_err(&device->cdev->dev,
+ "ERP %p has run out of retries and failed\n", 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->startdev;
+ 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->blocklist);
+
+ erp_free = erp_done;
+ erp_done = erp_done->refers;
+
+ /* free the finished erp request */
+ dasd_free_erp_request(erp_free, erp_free->memdev);
+
+ } /* end while */
+
+ if (erp->retries > 0) {
+
+ char *sense = dasd_get_sense(&erp->refers->irb);
+
+ /* check for special retries */
+ if (sense && erp->function == dasd_3990_erp_action_4) {
+
+ erp = dasd_3990_erp_action_4(erp, sense);
+
+ } else if (sense &&
+ erp->function == dasd_3990_erp_action_1B_32) {
+
+ erp = dasd_3990_update_1B(erp, sense);
+
+ } else if (sense && erp->function == dasd_3990_erp_int_req) {
+
+ erp = dasd_3990_erp_int_req(erp);
+
+ } else {
+ /* simple retry */
+ DBF_DEV_EVENT(DBF_DEBUG, device,
+ "%i retries left for erp %p",
+ erp->retries, erp);
+
+ /* handle the request again... */
+ erp->status = DASD_CQR_FILLED;
+ }
+
+ } 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
+ * control 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->startdev;
+ struct dasd_ccw_req *temp_erp = NULL;
+
+ if (device->features & DASD_FEATURE_ERPLOG) {
+ /* print current erp_chain */
+ dev_err(&device->cdev->dev,
+ "ERP chain at BEGINNING of ERP-ACTION\n");
+ for (temp_erp = cqr;
+ temp_erp != NULL; temp_erp = temp_erp->refers) {
+
+ dev_err(&device->cdev->dev,
+ "ERP %p (%02x) refers to %p\n",
+ temp_erp, temp_erp->status,
+ temp_erp->refers);
+ }
+ }
+
+ /* double-check if current erp/cqr was successful */
+ if ((scsw_cstat(&cqr->irb.scsw) == 0x00) &&
+ (scsw_dstat(&cqr->irb.scsw) ==
+ (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) {
+
+ DBF_DEV_EVENT(DBF_DEBUG, device,
+ "ERP called for successful request %p"
+ " - NO ERP necessary", cqr);
+
+ cqr->status = DASD_CQR_DONE;
+
+ 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);
+ if (IS_ERR(erp))
+ return erp;
+ } else {
+ /* matching erp found - set all leading erp's to DONE */
+ erp = dasd_3990_erp_handle_match_erp(cqr, erp);
+ }
+
+ if (device->features & DASD_FEATURE_ERPLOG) {
+ /* print current erp_chain */
+ dev_err(&device->cdev->dev,
+ "ERP chain at END of ERP-ACTION\n");
+ for (temp_erp = erp;
+ temp_erp != NULL; temp_erp = temp_erp->refers) {
+
+ dev_err(&device->cdev->dev,
+ "ERP %p (%02x) refers to %p\n",
+ temp_erp, temp_erp->status,
+ temp_erp->refers);
+ }
+ }
+
+ /* enqueue ERP request if it's a new one */
+ if (list_empty(&erp->blocklist)) {
+ cqr->status = DASD_CQR_IN_ERP;
+ /* add erp request before the cqr */
+ list_add_tail(&erp->blocklist, &cqr->blocklist);
+ }
+
+
+
+ return erp;
+
+} /* end dasd_3990_erp_action */
Code Review / kvmfornfv.git / blobdiff