#define ECKD_F7(i) (i->factor7)
#define ECKD_F8(i) (i->factor8)
+/*
+ * raw track access always map to 64k in memory
+ * so it maps to 16 blocks of 4k per track
+ */
+#define DASD_RAW_BLOCK_PER_TRACK 16
+#define DASD_RAW_BLOCKSIZE 4096
+/* 64k are 128 x 512 byte sectors */
+#define DASD_RAW_SECTORS_PER_TRACK 128
+
MODULE_LICENSE("GPL");
static struct dasd_discipline dasd_eckd_discipline;
static struct ccw_device_id dasd_eckd_ids[] = {
{ CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
{ CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
- { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3},
+ { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3},
{ CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
{ CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
{ CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
} *dasd_reserve_req;
static DEFINE_MUTEX(dasd_reserve_mutex);
+/* definitions for the path verification worker */
+struct path_verification_work_data {
+ struct work_struct worker;
+ struct dasd_device *device;
+ struct dasd_ccw_req cqr;
+ struct ccw1 ccw;
+ __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE];
+ int isglobal;
+ __u8 tbvpm;
+};
+static struct path_verification_work_data *path_verification_worker;
+static DEFINE_MUTEX(dasd_path_verification_mutex);
/* initial attempt at a probe function. this can be simplified once
* the other detection code is gone */
data->length = reclen;
data->operation.operation = 0x03;
break;
+ case DASD_ECKD_CCW_WRITE_FULL_TRACK:
+ data->operation.orientation = 0x0;
+ data->operation.operation = 0x3F;
+ data->extended_operation = 0x11;
+ data->length = 0;
+ data->extended_parameter_length = 0x02;
+ if (data->count > 8) {
+ data->extended_parameter[0] = 0xFF;
+ data->extended_parameter[1] = 0xFF;
+ data->extended_parameter[1] <<= (16 - count);
+ } else {
+ data->extended_parameter[0] = 0xFF;
+ data->extended_parameter[0] <<= (8 - count);
+ data->extended_parameter[1] = 0x00;
+ }
+ data->sector = 0xFF;
+ break;
case DASD_ECKD_CCW_WRITE_TRACK_DATA:
data->auxiliary.length_valid = 0x1;
data->length = reclen; /* not tlf, as one might think */
case DASD_ECKD_CCW_READ_COUNT:
data->operation.operation = 0x06;
break;
+ case DASD_ECKD_CCW_READ_TRACK:
+ data->operation.orientation = 0x1;
+ data->operation.operation = 0x0C;
+ data->extended_parameter_length = 0;
+ data->sector = 0xFF;
+ break;
case DASD_ECKD_CCW_READ_TRACK_DATA:
data->auxiliary.length_valid = 0x1;
data->length = tlf;
ccw->cmd_code = DASD_ECKD_CCW_PFX;
ccw->flags = 0;
- ccw->count = sizeof(*pfxdata);
- ccw->cda = (__u32) __pa(pfxdata);
+ if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
+ ccw->count = sizeof(*pfxdata) + 2;
+ ccw->cda = (__u32) __pa(pfxdata);
+ memset(pfxdata, 0, sizeof(*pfxdata) + 2);
+ } else {
+ ccw->count = sizeof(*pfxdata);
+ ccw->cda = (__u32) __pa(pfxdata);
+ memset(pfxdata, 0, sizeof(*pfxdata));
+ }
- memset(pfxdata, 0, sizeof(*pfxdata));
/* prefix data */
if (format > 1) {
DBF_DEV_EVENT(DBF_ERR, basedev,
dedata->mask.perm = 0x1;
dedata->attributes.operation = basepriv->attrib.operation;
break;
+ case DASD_ECKD_CCW_READ_TRACK:
case DASD_ECKD_CCW_READ_TRACK_DATA:
dedata->mask.perm = 0x1;
dedata->attributes.operation = basepriv->attrib.operation;
dedata->attributes.operation = DASD_BYPASS_CACHE;
rc = check_XRC_on_prefix(pfxdata, basedev);
break;
+ case DASD_ECKD_CCW_WRITE_FULL_TRACK:
+ dedata->mask.perm = 0x03;
+ dedata->attributes.operation = basepriv->attrib.operation;
+ dedata->blk_size = 0;
+ break;
case DASD_ECKD_CCW_WRITE_TRACK_DATA:
dedata->mask.perm = 0x02;
dedata->attributes.operation = basepriv->attrib.operation;
return -EINVAL;
}
-static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device,
- void *rcd_buffer,
- struct ciw *ciw, __u8 lpm)
+static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
+ struct dasd_ccw_req *cqr,
+ __u8 *rcd_buffer,
+ __u8 lpm)
{
- struct dasd_ccw_req *cqr;
struct ccw1 *ccw;
-
- cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, ciw->count,
- device);
-
- if (IS_ERR(cqr)) {
- DBF_DEV_EVENT(DBF_WARNING, device, "%s",
- "Could not allocate RCD request");
- return cqr;
- }
+ /*
+ * buffer has to start with EBCDIC "V1.0" to show
+ * support for virtual device SNEQ
+ */
+ rcd_buffer[0] = 0xE5;
+ rcd_buffer[1] = 0xF1;
+ rcd_buffer[2] = 0x4B;
+ rcd_buffer[3] = 0xF0;
ccw = cqr->cpaddr;
- ccw->cmd_code = ciw->cmd;
+ ccw->cmd_code = DASD_ECKD_CCW_RCD;
+ ccw->flags = 0;
ccw->cda = (__u32)(addr_t)rcd_buffer;
- ccw->count = ciw->count;
+ ccw->count = DASD_ECKD_RCD_DATA_SIZE;
+ cqr->magic = DASD_ECKD_MAGIC;
cqr->startdev = device;
cqr->memdev = device;
cqr->retries = 256;
cqr->buildclk = get_clock();
cqr->status = DASD_CQR_FILLED;
- return cqr;
+ set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
+}
+
+static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
+ struct dasd_ccw_req *cqr,
+ __u8 *rcd_buffer,
+ __u8 lpm)
+{
+ struct ciw *ciw;
+ int rc;
+ /*
+ * sanity check: scan for RCD command in extended SenseID data
+ * some devices do not support RCD
+ */
+ ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
+ if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
+ return -EOPNOTSUPP;
+
+ dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
+ clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
+ set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
+ cqr->retries = 5;
+ rc = dasd_sleep_on_immediatly(cqr);
+ return rc;
}
static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
struct dasd_ccw_req *cqr;
/*
- * scan for RCD command in extended SenseID data
+ * sanity check: scan for RCD command in extended SenseID data
+ * some devices do not support RCD
*/
ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
- if (!ciw || ciw->cmd == 0) {
+ if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
ret = -EOPNOTSUPP;
goto out_error;
}
- rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
+ rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
if (!rcd_buf) {
ret = -ENOMEM;
goto out_error;
}
-
- /*
- * buffer has to start with EBCDIC "V1.0" to show
- * support for virtual device SNEQ
- */
- rcd_buf[0] = 0xE5;
- rcd_buf[1] = 0xF1;
- rcd_buf[2] = 0x4B;
- rcd_buf[3] = 0xF0;
- cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm);
+ cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
+ 0, /* use rcd_buf as data ara */
+ device);
if (IS_ERR(cqr)) {
- ret = PTR_ERR(cqr);
+ DBF_DEV_EVENT(DBF_WARNING, device, "%s",
+ "Could not allocate RCD request");
+ ret = -ENOMEM;
goto out_error;
}
+ dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
ret = dasd_sleep_on(cqr);
/*
* on success we update the user input parms
if (ret)
goto out_error;
- *rcd_buffer_size = ciw->count;
+ *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
*rcd_buffer = rcd_buf;
return 0;
out_error:
void *conf_data;
int conf_len, conf_data_saved;
int rc;
- __u8 lpm;
+ __u8 lpm, opm;
struct dasd_eckd_private *private;
- struct dasd_eckd_path *path_data;
+ struct dasd_path *path_data;
private = (struct dasd_eckd_private *) device->private;
- path_data = (struct dasd_eckd_path *) &private->path_data;
- path_data->opm = ccw_device_get_path_mask(device->cdev);
+ path_data = &device->path_data;
+ opm = ccw_device_get_path_mask(device->cdev);
lpm = 0x80;
conf_data_saved = 0;
/* get configuration data per operational path */
for (lpm = 0x80; lpm; lpm>>= 1) {
- if (lpm & path_data->opm){
+ if (lpm & opm) {
rc = dasd_eckd_read_conf_lpm(device, &conf_data,
&conf_len, lpm);
if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
"No configuration data "
"retrieved");
+ /* no further analysis possible */
+ path_data->opm |= lpm;
continue; /* no error */
}
/* save first valid configuration data */
path_data->ppm |= lpm;
break;
}
+ path_data->opm |= lpm;
if (conf_data != private->conf_data)
kfree(conf_data);
}
return 0;
}
+static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
+{
+ struct dasd_eckd_private *private;
+ int mdc;
+ u32 fcx_max_data;
+
+ private = (struct dasd_eckd_private *) device->private;
+ if (private->fcx_max_data) {
+ mdc = ccw_device_get_mdc(device->cdev, lpm);
+ if ((mdc < 0)) {
+ dev_warn(&device->cdev->dev,
+ "Detecting the maximum data size for zHPF "
+ "requests failed (rc=%d) for a new path %x\n",
+ mdc, lpm);
+ return mdc;
+ }
+ fcx_max_data = mdc * FCX_MAX_DATA_FACTOR;
+ if (fcx_max_data < private->fcx_max_data) {
+ dev_warn(&device->cdev->dev,
+ "The maximum data size for zHPF requests %u "
+ "on a new path %x is below the active maximum "
+ "%u\n", fcx_max_data, lpm,
+ private->fcx_max_data);
+ return -EACCES;
+ }
+ }
+ return 0;
+}
+
+static void do_path_verification_work(struct work_struct *work)
+{
+ struct path_verification_work_data *data;
+ struct dasd_device *device;
+ __u8 lpm, opm, npm, ppm, epm;
+ unsigned long flags;
+ int rc;
+
+ data = container_of(work, struct path_verification_work_data, worker);
+ device = data->device;
+
+ opm = 0;
+ npm = 0;
+ ppm = 0;
+ epm = 0;
+ for (lpm = 0x80; lpm; lpm >>= 1) {
+ if (lpm & data->tbvpm) {
+ memset(data->rcd_buffer, 0, sizeof(data->rcd_buffer));
+ memset(&data->cqr, 0, sizeof(data->cqr));
+ data->cqr.cpaddr = &data->ccw;
+ rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
+ data->rcd_buffer,
+ lpm);
+ if (!rc) {
+ switch (dasd_eckd_path_access(data->rcd_buffer,
+ DASD_ECKD_RCD_DATA_SIZE)) {
+ case 0x02:
+ npm |= lpm;
+ break;
+ case 0x03:
+ ppm |= lpm;
+ break;
+ }
+ opm |= lpm;
+ } else if (rc == -EOPNOTSUPP) {
+ DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
+ "path verification: No configuration "
+ "data retrieved");
+ opm |= lpm;
+ } else if (rc == -EAGAIN) {
+ DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
+ "path verification: device is stopped,"
+ " try again later");
+ epm |= lpm;
+ } else {
+ dev_warn(&device->cdev->dev,
+ "Reading device feature codes failed "
+ "(rc=%d) for new path %x\n", rc, lpm);
+ continue;
+ }
+ if (verify_fcx_max_data(device, lpm)) {
+ opm &= ~lpm;
+ npm &= ~lpm;
+ ppm &= ~lpm;
+ }
+ }
+ }
+ /*
+ * There is a small chance that a path is lost again between
+ * above path verification and the following modification of
+ * the device opm mask. We could avoid that race here by using
+ * yet another path mask, but we rather deal with this unlikely
+ * situation in dasd_start_IO.
+ */
+ spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
+ if (!device->path_data.opm && opm) {
+ device->path_data.opm = opm;
+ dasd_generic_path_operational(device);
+ } else
+ device->path_data.opm |= opm;
+ device->path_data.npm |= npm;
+ device->path_data.ppm |= ppm;
+ device->path_data.tbvpm |= epm;
+ spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
+
+ dasd_put_device(device);
+ if (data->isglobal)
+ mutex_unlock(&dasd_path_verification_mutex);
+ else
+ kfree(data);
+}
+
+static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
+{
+ struct path_verification_work_data *data;
+
+ data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
+ if (!data) {
+ if (mutex_trylock(&dasd_path_verification_mutex)) {
+ data = path_verification_worker;
+ data->isglobal = 1;
+ } else
+ return -ENOMEM;
+ } else {
+ memset(data, 0, sizeof(*data));
+ data->isglobal = 0;
+ }
+ INIT_WORK(&data->worker, do_path_verification_work);
+ dasd_get_device(device);
+ data->device = device;
+ data->tbvpm = lpm;
+ schedule_work(&data->worker);
+ return 0;
+}
+
static int dasd_eckd_read_features(struct dasd_device *device)
{
struct dasd_psf_prssd_data *prssdp;
"returned rc=%d", private->uid.ssid, rc);
}
+static u32 get_fcx_max_data(struct dasd_device *device)
+{
+#if defined(CONFIG_64BIT)
+ int tpm, mdc;
+ int fcx_in_css, fcx_in_gneq, fcx_in_features;
+ struct dasd_eckd_private *private;
+
+ if (dasd_nofcx)
+ return 0;
+ /* is transport mode supported? */
+ private = (struct dasd_eckd_private *) device->private;
+ fcx_in_css = css_general_characteristics.fcx;
+ fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
+ fcx_in_features = private->features.feature[40] & 0x80;
+ tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
+
+ if (!tpm)
+ return 0;
+
+ mdc = ccw_device_get_mdc(device->cdev, 0);
+ if (mdc < 0) {
+ dev_warn(&device->cdev->dev, "Detecting the maximum supported"
+ " data size for zHPF requests failed\n");
+ return 0;
+ } else
+ return mdc * FCX_MAX_DATA_FACTOR;
+#else
+ return 0;
+#endif
+}
+
/*
* Check device characteristics.
* If the device is accessible using ECKD discipline, the device is enabled.
goto out_err2;
}
/*
- * dasd_eckd_vaildate_server is done on the first device that
+ * dasd_eckd_validate_server is done on the first device that
* is found for an LCU. All later other devices have to wait
* for it, so they will read the correct feature codes.
*/
"Read device characteristic failed, rc=%d", rc);
goto out_err3;
}
- /* find the vaild cylinder size */
+ /* find the valid cylinder size */
if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
private->rdc_data.long_no_cyl)
private->real_cyl = private->rdc_data.long_no_cyl;
else
private->real_cyl = private->rdc_data.no_cyl;
+ private->fcx_max_data = get_fcx_max_data(device);
+
readonly = dasd_device_is_ro(device);
if (readonly)
set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
dasd_sfree_request(init_cqr, device);
}
+ if (device->features & DASD_FEATURE_USERAW) {
+ block->bp_block = DASD_RAW_BLOCKSIZE;
+ blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
+ block->s2b_shift = 3;
+ goto raw;
+ }
+
if (status == INIT_CQR_UNFORMATTED) {
dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
return -EMEDIUMTYPE;
dev_warn(&device->cdev->dev,
"Track 0 has no records following the VTOC\n");
}
+
if (count_area != NULL && count_area->kl == 0) {
/* we found notthing violating our disk layout */
if (dasd_check_blocksize(count_area->dl) == 0)
block->s2b_shift++;
blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
+
+raw:
block->blocks = (private->real_cyl *
private->rdc_data.trk_per_cyl *
blk_per_trk);
if (cqr->block && (cqr->startdev != cqr->block->base)) {
dasd_eckd_reset_ccw_to_base_io(cqr);
cqr->startdev = cqr->block->base;
+ cqr->lpm = cqr->block->base->path_data.opm;
}
};
return dasd_default_erp_postaction;
}
-
-static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
- struct irb *irb)
+static void dasd_eckd_check_for_device_change(struct dasd_device *device,
+ struct dasd_ccw_req *cqr,
+ struct irb *irb)
{
char mask;
char *sense = NULL;
/* schedule worker to reload device */
dasd_reload_device(device);
}
-
dasd_generic_handle_state_change(device);
return;
}
+ sense = dasd_get_sense(irb);
+ if (!sense)
+ return;
+
/* summary unit check */
- if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
- (irb->ecw[7] == 0x0D)) {
+ if ((sense[7] == 0x0D) &&
+ (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
dasd_alias_handle_summary_unit_check(device, irb);
return;
}
- sense = dasd_get_sense(irb);
/* service information message SIM */
- if (sense && !(sense[27] & DASD_SENSE_BIT_0) &&
+ if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
dasd_3990_erp_handle_sim(device, sense);
- dasd_schedule_device_bh(device);
return;
}
- if ((scsw_cc(&irb->scsw) == 1) &&
- (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
- (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) &&
- (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) {
- /* fake irb do nothing, they are handled elsewhere */
- dasd_schedule_device_bh(device);
- return;
- }
-
- if (!sense) {
- /* just report other unsolicited interrupts */
- DBF_DEV_EVENT(DBF_ERR, device, "%s",
- "unsolicited interrupt received");
- } else {
- DBF_DEV_EVENT(DBF_ERR, device, "%s",
- "unsolicited interrupt received "
- "(sense available)");
- device->discipline->dump_sense_dbf(device, irb, "unsolicited");
+ /* loss of device reservation is handled via base devices only
+ * as alias devices may be used with several bases
+ */
+ if (device->block && (sense[7] == 0x3F) &&
+ (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
+ test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
+ if (device->features & DASD_FEATURE_FAILONSLCK)
+ set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
+ clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
+ dev_err(&device->cdev->dev,
+ "The device reservation was lost\n");
}
-
- dasd_schedule_device_bh(device);
- return;
-};
-
+}
static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
struct dasd_device *startdev,
cqr->memdev = startdev;
cqr->block = block;
cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
- cqr->lpm = private->path_data.ppm;
+ cqr->lpm = startdev->path_data.ppm;
cqr->retries = 256;
cqr->buildclk = get_clock();
cqr->status = DASD_CQR_FILLED;
cqr->memdev = startdev;
cqr->block = block;
cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
- cqr->lpm = private->path_data.ppm;
+ cqr->lpm = startdev->path_data.ppm;
cqr->retries = 256;
cqr->buildclk = get_clock();
cqr->status = DASD_CQR_FILLED;
struct tidaw *last_tidaw = NULL;
int itcw_op;
size_t itcw_size;
+ u8 tidaw_flags;
+ unsigned int seg_len, part_len, len_to_track_end;
+ unsigned char new_track;
+ sector_t recid, trkid;
+ unsigned int offs;
+ unsigned int count, count_to_trk_end;
basedev = block->base;
private = (struct dasd_eckd_private *) basedev->private;
/* trackbased I/O needs address all memory via TIDAWs,
* not just for 64 bit addresses. This allows us to map
* each segment directly to one tidaw.
+ * In the case of write requests, additional tidaws may
+ * be needed when a segment crosses a track boundary.
*/
trkcount = last_trk - first_trk + 1;
ctidaw = 0;
rq_for_each_segment(bv, req, iter) {
++ctidaw;
}
+ if (rq_data_dir(req) == WRITE)
+ ctidaw += (last_trk - first_trk);
/* Allocate the ccw request. */
itcw_size = itcw_calc_size(0, ctidaw, 0);
if (IS_ERR(cqr))
return cqr;
- cqr->cpmode = 1;
- cqr->startdev = startdev;
- cqr->memdev = startdev;
- cqr->block = block;
- cqr->expires = 100*HZ;
- cqr->buildclk = get_clock();
- cqr->status = DASD_CQR_FILLED;
- cqr->retries = 10;
-
/* transfer length factor: how many bytes to read from the last track */
if (first_trk == last_trk)
tlf = last_offs - first_offs + 1;
tlf *= blksize;
itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
+ if (IS_ERR(itcw)) {
+ dasd_sfree_request(cqr, startdev);
+ return ERR_PTR(-EINVAL);
+ }
cqr->cpaddr = itcw_get_tcw(itcw);
-
if (prepare_itcw(itcw, first_trk, last_trk,
cmd, basedev, startdev,
first_offs + 1,
dasd_sfree_request(cqr, startdev);
return ERR_PTR(-EAGAIN);
}
-
/*
* A tidaw can address 4k of memory, but must not cross page boundaries
* We can let the block layer handle this by setting
* blk_queue_segment_boundary to page boundaries and
* blk_max_segment_size to page size when setting up the request queue.
+ * For write requests, a TIDAW must not cross track boundaries, because
+ * we have to set the CBC flag on the last tidaw for each track.
*/
- rq_for_each_segment(bv, req, iter) {
- dst = page_address(bv->bv_page) + bv->bv_offset;
- last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len);
- if (IS_ERR(last_tidaw))
- return (struct dasd_ccw_req *)last_tidaw;
+ if (rq_data_dir(req) == WRITE) {
+ new_track = 1;
+ recid = first_rec;
+ rq_for_each_segment(bv, req, iter) {
+ dst = page_address(bv->bv_page) + bv->bv_offset;
+ seg_len = bv->bv_len;
+ while (seg_len) {
+ if (new_track) {
+ trkid = recid;
+ offs = sector_div(trkid, blk_per_trk);
+ count_to_trk_end = blk_per_trk - offs;
+ count = min((last_rec - recid + 1),
+ (sector_t)count_to_trk_end);
+ len_to_track_end = count * blksize;
+ recid += count;
+ new_track = 0;
+ }
+ part_len = min(seg_len, len_to_track_end);
+ seg_len -= part_len;
+ len_to_track_end -= part_len;
+ /* We need to end the tidaw at track end */
+ if (!len_to_track_end) {
+ new_track = 1;
+ tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
+ } else
+ tidaw_flags = 0;
+ last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
+ dst, part_len);
+ if (IS_ERR(last_tidaw))
+ return ERR_PTR(-EINVAL);
+ dst += part_len;
+ }
+ }
+ } else {
+ rq_for_each_segment(bv, req, iter) {
+ dst = page_address(bv->bv_page) + bv->bv_offset;
+ last_tidaw = itcw_add_tidaw(itcw, 0x00,
+ dst, bv->bv_len);
+ if (IS_ERR(last_tidaw))
+ return ERR_PTR(-EINVAL);
+ }
}
-
- last_tidaw->flags |= 0x80;
+ last_tidaw->flags |= TIDAW_FLAGS_LAST;
+ last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
itcw_finalize(itcw);
if (blk_noretry_request(req) ||
block->base->features & DASD_FEATURE_FAILFAST)
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
+ cqr->cpmode = 1;
cqr->startdev = startdev;
cqr->memdev = startdev;
cqr->block = block;
cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
- cqr->lpm = private->path_data.ppm;
+ cqr->lpm = startdev->path_data.ppm;
cqr->retries = 256;
cqr->buildclk = get_clock();
cqr->status = DASD_CQR_FILLED;
struct dasd_block *block,
struct request *req)
{
- int tpm, cmdrtd, cmdwtd;
+ int cmdrtd, cmdwtd;
int use_prefix;
-#if defined(CONFIG_64BIT)
- int fcx_in_css, fcx_in_gneq, fcx_in_features;
-#endif
+ int fcx_multitrack;
struct dasd_eckd_private *private;
struct dasd_device *basedev;
sector_t first_rec, last_rec;
unsigned int first_offs, last_offs;
unsigned int blk_per_trk, blksize;
int cdlspecial;
+ unsigned int data_size;
struct dasd_ccw_req *cqr;
basedev = block->base;
last_offs = sector_div(last_trk, blk_per_trk);
cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
- /* is transport mode supported? */
-#if defined(CONFIG_64BIT)
- fcx_in_css = css_general_characteristics.fcx;
- fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
- fcx_in_features = private->features.feature[40] & 0x80;
- tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
-#else
- tpm = 0;
-#endif
+ fcx_multitrack = private->features.feature[40] & 0x20;
+ data_size = blk_rq_bytes(req);
+ /* tpm write request add CBC data on each track boundary */
+ if (rq_data_dir(req) == WRITE)
+ data_size += (last_trk - first_trk) * 4;
/* is read track data and write track data in command mode supported? */
cmdrtd = private->features.feature[9] & 0x20;
cqr = NULL;
if (cdlspecial || dasd_page_cache) {
/* do nothing, just fall through to the cmd mode single case */
- } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) {
+ } else if ((data_size <= private->fcx_max_data)
+ && (fcx_multitrack || (first_trk == last_trk))) {
cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
first_rec, last_rec,
first_trk, last_trk,
first_offs, last_offs,
blk_per_trk, blksize);
- if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
+ if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
+ (PTR_ERR(cqr) != -ENOMEM))
cqr = NULL;
} else if (use_prefix &&
(((rq_data_dir(req) == READ) && cmdrtd) ||
first_trk, last_trk,
first_offs, last_offs,
blk_per_trk, blksize);
- if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
+ if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
+ (PTR_ERR(cqr) != -ENOMEM))
cqr = NULL;
}
if (!cqr)
return cqr;
}
+static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev,
+ struct dasd_block *block,
+ struct request *req)
+{
+ struct dasd_eckd_private *private;
+ unsigned long *idaws;
+ struct dasd_device *basedev;
+ struct dasd_ccw_req *cqr;
+ struct ccw1 *ccw;
+ struct req_iterator iter;
+ struct bio_vec *bv;
+ char *dst;
+ unsigned char cmd;
+ unsigned int trkcount;
+ unsigned int seg_len, len_to_track_end;
+ unsigned int first_offs;
+ unsigned int cidaw, cplength, datasize;
+ sector_t first_trk, last_trk;
+ unsigned int pfx_datasize;
+
+ /*
+ * raw track access needs to be mutiple of 64k and on 64k boundary
+ */
+ if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) {
+ cqr = ERR_PTR(-EINVAL);
+ goto out;
+ }
+ if (((blk_rq_pos(req) + blk_rq_sectors(req)) %
+ DASD_RAW_SECTORS_PER_TRACK) != 0) {
+ cqr = ERR_PTR(-EINVAL);
+ goto out;
+ }
+
+ first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
+ last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
+ DASD_RAW_SECTORS_PER_TRACK;
+ trkcount = last_trk - first_trk + 1;
+ first_offs = 0;
+ basedev = block->base;
+ private = (struct dasd_eckd_private *) basedev->private;
+
+ if (rq_data_dir(req) == READ)
+ cmd = DASD_ECKD_CCW_READ_TRACK;
+ else if (rq_data_dir(req) == WRITE)
+ cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
+ else {
+ cqr = ERR_PTR(-EINVAL);
+ goto out;
+ }
+
+ /*
+ * Raw track based I/O needs IDAWs for each page,
+ * and not just for 64 bit addresses.
+ */
+ cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
+
+ /* 1x prefix + one read/write ccw per track */
+ cplength = 1 + trkcount;
+
+ /*
+ * struct PFX_eckd_data has up to 2 byte as extended parameter
+ * this is needed for write full track and has to be mentioned
+ * seperately
+ * add 8 instead of 2 to keep 8 byte boundary
+ */
+ pfx_datasize = sizeof(struct PFX_eckd_data) + 8;
+
+ datasize = pfx_datasize + cidaw * sizeof(unsigned long long);
+
+ /* Allocate the ccw request. */
+ cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
+ datasize, startdev);
+ if (IS_ERR(cqr))
+ goto out;
+ ccw = cqr->cpaddr;
+
+ if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd,
+ basedev, startdev, 1 /* format */, first_offs + 1,
+ trkcount, 0, 0) == -EAGAIN) {
+ /* Clock not in sync and XRC is enabled.
+ * Try again later.
+ */
+ dasd_sfree_request(cqr, startdev);
+ cqr = ERR_PTR(-EAGAIN);
+ goto out;
+ }
+
+ idaws = (unsigned long *)(cqr->data + pfx_datasize);
+
+ len_to_track_end = 0;
+
+ rq_for_each_segment(bv, req, iter) {
+ dst = page_address(bv->bv_page) + bv->bv_offset;
+ seg_len = bv->bv_len;
+ if (!len_to_track_end) {
+ ccw[-1].flags |= CCW_FLAG_CC;
+ ccw->cmd_code = cmd;
+ /* maximum 3390 track size */
+ ccw->count = 57326;
+ /* 64k map to one track */
+ len_to_track_end = 65536;
+ ccw->cda = (__u32)(addr_t)idaws;
+ ccw->flags |= CCW_FLAG_IDA;
+ ccw->flags |= CCW_FLAG_SLI;
+ ccw++;
+ }
+ len_to_track_end -= seg_len;
+ idaws = idal_create_words(idaws, dst, seg_len);
+ }
+
+ if (blk_noretry_request(req) ||
+ block->base->features & DASD_FEATURE_FAILFAST)
+ set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
+ cqr->startdev = startdev;
+ cqr->memdev = startdev;
+ cqr->block = block;
+ cqr->expires = startdev->default_expires * HZ;
+ cqr->lpm = startdev->path_data.ppm;
+ cqr->retries = 256;
+ cqr->buildclk = get_clock();
+ cqr->status = DASD_CQR_FILLED;
+
+ if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
+ cqr = NULL;
+out:
+ return cqr;
+}
+
+
static int
dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
{
spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
private->count++;
- cqr = dasd_eckd_build_cp(startdev, block, req);
+ if ((base->features & DASD_FEATURE_USERAW))
+ cqr = dasd_raw_build_cp(startdev, block, req);
+ else
+ cqr = dasd_eckd_build_cp(startdev, block, req);
if (IS_ERR(cqr))
private->count--;
spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
cqr->status = DASD_CQR_FILLED;
rc = dasd_sleep_on_immediatly(cqr);
+ if (!rc)
+ clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
if (useglobal)
mutex_unlock(&dasd_reserve_mutex);
cqr->status = DASD_CQR_FILLED;
rc = dasd_sleep_on_immediatly(cqr);
+ if (!rc)
+ set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
if (useglobal)
mutex_unlock(&dasd_reserve_mutex);
cqr->status = DASD_CQR_FILLED;
rc = dasd_sleep_on_immediatly(cqr);
+ if (!rc)
+ set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
+
+ if (useglobal)
+ mutex_unlock(&dasd_reserve_mutex);
+ else
+ dasd_sfree_request(cqr, cqr->memdev);
+ return rc;
+}
+
+/*
+ * SNID - Sense Path Group ID
+ * This ioctl may be used in situations where I/O is stalled due to
+ * a reserve, so if the normal dasd_smalloc_request fails, we use the
+ * preallocated dasd_reserve_req.
+ */
+static int dasd_eckd_snid(struct dasd_device *device,
+ void __user *argp)
+{
+ struct dasd_ccw_req *cqr;
+ int rc;
+ struct ccw1 *ccw;
+ int useglobal;
+ struct dasd_snid_ioctl_data usrparm;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
+ return -EFAULT;
+
+ useglobal = 0;
+ cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
+ sizeof(struct dasd_snid_data), device);
+ if (IS_ERR(cqr)) {
+ mutex_lock(&dasd_reserve_mutex);
+ useglobal = 1;
+ cqr = &dasd_reserve_req->cqr;
+ memset(cqr, 0, sizeof(*cqr));
+ memset(&dasd_reserve_req->ccw, 0,
+ sizeof(dasd_reserve_req->ccw));
+ cqr->cpaddr = &dasd_reserve_req->ccw;
+ cqr->data = &dasd_reserve_req->data;
+ cqr->magic = DASD_ECKD_MAGIC;
+ }
+ ccw = cqr->cpaddr;
+ ccw->cmd_code = DASD_ECKD_CCW_SNID;
+ ccw->flags |= CCW_FLAG_SLI;
+ ccw->count = 12;
+ ccw->cda = (__u32)(addr_t) cqr->data;
+ cqr->startdev = device;
+ cqr->memdev = device;
+ clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
+ set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
+ set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
+ cqr->retries = 5;
+ cqr->expires = 10 * HZ;
+ cqr->buildclk = get_clock();
+ cqr->status = DASD_CQR_FILLED;
+ cqr->lpm = usrparm.path_mask;
+
+ rc = dasd_sleep_on_immediatly(cqr);
+ /* verify that I/O processing didn't modify the path mask */
+ if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
+ rc = -EIO;
+ if (!rc) {
+ usrparm.data = *((struct dasd_snid_data *)cqr->data);
+ if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
+ rc = -EFAULT;
+ }
if (useglobal)
mutex_unlock(&dasd_reserve_mutex);
return dasd_eckd_reserve(device);
case BIODASDSLCK:
return dasd_eckd_steal_lock(device);
+ case BIODASDSNID:
+ return dasd_eckd_snid(device, argp);
case BIODASDSYMMIO:
return dasd_symm_io(device, argp);
default:
char *reason)
{
u64 *sense;
+ u64 *stat;
sense = (u64 *) dasd_get_sense(irb);
+ stat = (u64 *) &irb->scsw;
if (sense) {
- DBF_DEV_EVENT(DBF_EMERG, device,
- "%s: %s %02x%02x%02x %016llx %016llx %016llx "
- "%016llx", reason,
- scsw_is_tm(&irb->scsw) ? "t" : "c",
- scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw),
- scsw_dstat(&irb->scsw), sense[0], sense[1],
- sense[2], sense[3]);
+ DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
+ "%016llx %016llx %016llx %016llx",
+ reason, *stat, *((u32 *) (stat + 1)),
+ sense[0], sense[1], sense[2], sense[3]);
} else {
- DBF_DEV_EVENT(DBF_EMERG, device, "%s",
- "SORRY - NO VALID SENSE AVAILABLE\n");
+ DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
+ reason, *stat, *((u32 *) (stat + 1)),
+ "NO VALID SENSE");
}
}
" I/O status report for device %s:\n",
dev_name(&device->cdev->dev));
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
- " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n",
- req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
- scsw_cc(&irb->scsw), req ? req->intrc : 0);
+ " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
+ "CS:%02X RC:%d\n",
+ req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
+ scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
+ scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
+ req ? req->intrc : 0);
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
" device %s: Failing CCW: %p\n",
dev_name(&device->cdev->dev),
{
char *page;
int len, sl, sct, residual;
-
struct tsb *tsb;
- u8 *sense;
-
+ u8 *sense, *rcq;
page = (char *) get_zeroed_page(GFP_ATOMIC);
if (page == NULL) {
" I/O status report for device %s:\n",
dev_name(&device->cdev->dev));
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
- " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d "
- "fcxs: 0x%02X schxs: 0x%02X\n", req,
- scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
- scsw_cc(&irb->scsw), req->intrc,
- irb->scsw.tm.fcxs, irb->scsw.tm.schxs);
+ " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
+ "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
+ req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
+ scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
+ scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
+ irb->scsw.tm.fcxs, irb->scsw.tm.schxs,
+ req ? req->intrc : 0);
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
" device %s: Failing TCW: %p\n",
dev_name(&device->cdev->dev),
tsb = NULL;
sense = NULL;
- if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs == 0x01))
+ if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
tsb = tcw_get_tsb(
(struct tcw *)(unsigned long)irb->scsw.tm.tcw);
case 2: /* ts_ddpc */
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
" tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
- len += sprintf(page + len, KERN_ERR PRINTK_HEADER
- " tsb->tsa.ddpc.rcq: ");
- for (sl = 0; sl < 16; sl++) {
+ for (sl = 0; sl < 2; sl++) {
+ len += sprintf(page + len,
+ KERN_ERR PRINTK_HEADER
+ " tsb->tsa.ddpc.rcq %2d-%2d: ",
+ (8 * sl), ((8 * sl) + 7));
+ rcq = tsb->tsa.ddpc.rcq;
for (sct = 0; sct < 8; sct++) {
len += sprintf(page + len, " %02x",
- tsb->tsa.ddpc.rcq[sl]);
+ rcq[8 * sl + sct]);
}
len += sprintf(page + len, "\n");
}
static void dasd_eckd_dump_sense(struct dasd_device *device,
struct dasd_ccw_req *req, struct irb *irb)
{
- if (req && scsw_is_tm(&req->irb.scsw))
+ if (scsw_is_tm(&irb->scsw))
dasd_eckd_dump_sense_tcw(device, req, irb);
else
dasd_eckd_dump_sense_ccw(device, req, irb);
.set_offline = dasd_generic_set_offline,
.set_online = dasd_eckd_set_online,
.notify = dasd_generic_notify,
+ .path_event = dasd_generic_path_event,
.freeze = dasd_generic_pm_freeze,
.thaw = dasd_generic_restore_device,
.restore = dasd_generic_restore_device,
.owner = THIS_MODULE,
.name = "ECKD",
.ebcname = "ECKD",
- .max_blocks = 240,
+ .max_blocks = 190,
.check_device = dasd_eckd_check_characteristics,
.uncheck_device = dasd_eckd_uncheck_device,
.do_analysis = dasd_eckd_do_analysis,
+ .verify_path = dasd_eckd_verify_path,
.ready_to_online = dasd_eckd_ready_to_online,
.online_to_ready = dasd_eckd_online_to_ready,
.fill_geometry = dasd_eckd_fill_geometry,
.format_device = dasd_eckd_format_device,
.erp_action = dasd_eckd_erp_action,
.erp_postaction = dasd_eckd_erp_postaction,
- .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt,
+ .check_for_device_change = dasd_eckd_check_for_device_change,
.build_cp = dasd_eckd_build_alias_cp,
.free_cp = dasd_eckd_free_alias_cp,
.dump_sense = dasd_eckd_dump_sense,
GFP_KERNEL | GFP_DMA);
if (!dasd_reserve_req)
return -ENOMEM;
+ path_verification_worker = kmalloc(sizeof(*path_verification_worker),
+ GFP_KERNEL | GFP_DMA);
+ if (!path_verification_worker) {
+ kfree(dasd_reserve_req);
+ return -ENOMEM;
+ }
ret = ccw_driver_register(&dasd_eckd_driver);
if (!ret)
wait_for_device_probe();
- else
+ else {
+ kfree(path_verification_worker);
kfree(dasd_reserve_req);
+ }
return ret;
}
dasd_eckd_cleanup(void)
{
ccw_driver_unregister(&dasd_eckd_driver);
+ kfree(path_verification_worker);
kfree(dasd_reserve_req);
}
projects / mv-sheeva.git / blobdiff