return (d1 + (d2 - 1)) / d2;
}
-static inline int
-bytes_per_record(struct dasd_eckd_characteristics *rdc, int kl, int dl)
-{
- unsigned int fl1, fl2, int1, int2;
- int bpr;
-
- switch (rdc->formula) {
- case 0x01:
- fl1 = round_up_multiple(ECKD_F2(rdc) + dl, ECKD_F1(rdc));
- fl2 = round_up_multiple(kl ? ECKD_F2(rdc) + kl : 0,
- ECKD_F1(rdc));
- bpr = fl1 + fl2;
- break;
- case 0x02:
- int1 = ceil_quot(dl + ECKD_F6(rdc), ECKD_F5(rdc) << 1);
- int2 = ceil_quot(kl + ECKD_F6(rdc), ECKD_F5(rdc) << 1);
- fl1 = round_up_multiple(ECKD_F1(rdc) * ECKD_F2(rdc) + dl +
- ECKD_F6(rdc) + ECKD_F4(rdc) * int1,
- ECKD_F1(rdc));
- fl2 = round_up_multiple(ECKD_F1(rdc) * ECKD_F3(rdc) + kl +
- ECKD_F6(rdc) + ECKD_F4(rdc) * int2,
- ECKD_F1(rdc));
- bpr = fl1 + fl2;
- break;
- default:
- bpr = 0;
- break;
- }
- return bpr;
-}
-
-static inline unsigned int
-bytes_per_track(struct dasd_eckd_characteristics *rdc)
-{
- return *(unsigned int *) (rdc->byte_per_track) >> 8;
-}
-
-static inline unsigned int
+static unsigned int
recs_per_track(struct dasd_eckd_characteristics * rdc,
unsigned int kl, unsigned int dl)
{
return 0;
}
-static inline void
+static int
check_XRC (struct ccw1 *de_ccw,
struct DE_eckd_data *data,
struct dasd_device *device)
{
struct dasd_eckd_private *private;
+ int rc;
private = (struct dasd_eckd_private *) device->private;
+ if (!private->rdc_data.facilities.XRC_supported)
+ return 0;
/* switch on System Time Stamp - needed for XRC Support */
- if (private->rdc_data.facilities.XRC_supported) {
-
- data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
- data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
+ data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
+ data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
- data->ep_sys_time = get_clock ();
+ rc = get_sync_clock(&data->ep_sys_time);
+ /* Ignore return code if sync clock is switched off. */
+ if (rc == -ENOSYS || rc == -EACCES)
+ rc = 0;
- de_ccw->count = sizeof (struct DE_eckd_data);
- de_ccw->flags |= CCW_FLAG_SLI;
- }
-
- return;
-
-} /* end check_XRC */
+ de_ccw->count = sizeof (struct DE_eckd_data);
+ de_ccw->flags |= CCW_FLAG_SLI;
+ return rc;
+}
-static inline void
+static int
define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk,
int totrk, int cmd, struct dasd_device * device)
{
struct dasd_eckd_private *private;
struct ch_t geo, beg, end;
+ int rc = 0;
private = (struct dasd_eckd_private *) device->private;
case DASD_ECKD_CCW_WRITE_KD_MT:
data->mask.perm = 0x02;
data->attributes.operation = private->attrib.operation;
- check_XRC (ccw, data, device);
+ rc = check_XRC (ccw, data, device);
break;
case DASD_ECKD_CCW_WRITE_CKD:
case DASD_ECKD_CCW_WRITE_CKD_MT:
data->attributes.operation = DASD_BYPASS_CACHE;
- check_XRC (ccw, data, device);
+ rc = check_XRC (ccw, data, device);
break;
case DASD_ECKD_CCW_ERASE:
case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
data->mask.perm = 0x3;
data->mask.auth = 0x1;
data->attributes.operation = DASD_BYPASS_CACHE;
- check_XRC (ccw, data, device);
+ rc = check_XRC (ccw, data, device);
break;
default:
DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd);
data->beg_ext.head = beg.head;
data->end_ext.cyl = end.cyl;
data->end_ext.head = end.head;
+ return rc;
}
-static inline void
+static void
locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk,
int rec_on_trk, int no_rec, int cmd,
struct dasd_device * device, int reclen)
return 0;
}
+static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device,
+ void *rcd_buffer,
+ struct ciw *ciw, __u8 lpm)
+{
+ struct dasd_ccw_req *cqr;
+ struct ccw1 *ccw;
+
+ cqr = dasd_smalloc_request("ECKD", 1 /* RCD */, ciw->count, device);
+
+ if (IS_ERR(cqr)) {
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "Could not allocate RCD request");
+ return cqr;
+ }
+
+ ccw = cqr->cpaddr;
+ ccw->cmd_code = ciw->cmd;
+ ccw->cda = (__u32)(addr_t)rcd_buffer;
+ ccw->count = ciw->count;
+
+ cqr->device = device;
+ cqr->expires = 10*HZ;
+ cqr->lpm = lpm;
+ clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
+ cqr->retries = 2;
+ cqr->buildclk = get_clock();
+ cqr->status = DASD_CQR_FILLED;
+ return cqr;
+}
+
+static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
+ void **rcd_buffer,
+ int *rcd_buffer_size, __u8 lpm)
+{
+ struct ciw *ciw;
+ char *rcd_buf = NULL;
+ int ret;
+ struct dasd_ccw_req *cqr;
+
+ /*
+ * scan for RCD command in extended SenseID data
+ */
+ ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
+ if (!ciw || ciw->cmd == 0) {
+ ret = -EOPNOTSUPP;
+ goto out_error;
+ }
+ rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
+ if (!rcd_buf) {
+ ret = -ENOMEM;
+ goto out_error;
+ }
+ cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm);
+ if (IS_ERR(cqr)) {
+ ret = PTR_ERR(cqr);
+ goto out_error;
+ }
+ ret = dasd_sleep_on(cqr);
+ /*
+ * on success we update the user input parms
+ */
+ dasd_sfree_request(cqr, cqr->device);
+ if (ret)
+ goto out_error;
+
+ *rcd_buffer_size = ciw->count;
+ *rcd_buffer = rcd_buf;
+ return 0;
+out_error:
+ kfree(rcd_buf);
+ *rcd_buffer = NULL;
+ *rcd_buffer_size = 0;
+ return ret;
+}
+
static int
dasd_eckd_read_conf(struct dasd_device *device)
{
/* get configuration data per operational path */
for (lpm = 0x80; lpm; lpm>>= 1) {
if (lpm & path_data->opm){
- rc = read_conf_data_lpm(device->cdev, &conf_data,
- &conf_len, lpm);
+ rc = dasd_eckd_read_conf_lpm(device, &conf_data,
+ &conf_len, lpm);
if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
MESSAGE(KERN_WARNING,
"Read configuration data returned "
/*
* Build CP for Perform Subsystem Function - SSC.
*/
-struct dasd_ccw_req *
+static struct dasd_ccw_req *
dasd_eckd_build_psf_ssc(struct dasd_device *device)
{
struct dasd_ccw_req *cqr;
/* Read Device Characteristics */
rdc_data = (void *) &(private->rdc_data);
memset(rdc_data, 0, sizeof(rdc_data));
- rc = read_dev_chars(device->cdev, &rdc_data, 64);
+ rc = dasd_generic_read_dev_chars(device, "ECKD", &rdc_data, 64);
if (rc)
DEV_MESSAGE(KERN_WARNING, device,
"Read device characteristics returned "
return cqr;
ccw = cqr->cpaddr;
/* First ccw is define extent. */
- define_extent(ccw++, cqr->data, first_trk, last_trk, cmd, device);
+ if (define_extent(ccw++, cqr->data, first_trk,
+ last_trk, cmd, device) == -EAGAIN) {
+ /* Clock not in sync and XRC is enabled. Try again later. */
+ dasd_sfree_request(cqr, device);
+ return ERR_PTR(-EAGAIN);
+ }
/* Build locate_record+read/write/ccws. */
idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data));
LO_data = (struct LO_eckd_data *) (idaws + cidaw);
cqr->device = device;
clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
- cqr->retries = 0;
+ cqr->retries = 2; /* set retry counter to enable basic ERP */
cqr->expires = 2 * HZ;
cqr->buildclk = get_clock();
cqr->status = DASD_CQR_FILLED;
cqr->device = device;
clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
- cqr->retries = 0;
+ cqr->retries = 2; /* set retry counter to enable basic ERP */
cqr->expires = 2 * HZ;
cqr->buildclk = get_clock();
cqr->status = DASD_CQR_FILLED;
cqr->device = device;
clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
- cqr->retries = 0;
+ cqr->retries = 2; /* set retry counter to enable basic ERP */
cqr->expires = 2 * HZ;
cqr->buildclk = get_clock();
cqr->status = DASD_CQR_FILLED;
* Dump the range of CCWs into 'page' buffer
* and return number of printed chars.
*/
-static inline int
+static int
dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
{
int len, count;
projects / linux-2.6-omap-h63xx.git / blobdiff