Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
new file mode 100644
index 0000000..838aedf
--- /dev/null
+++ b/drivers/s390/block/dasd_eckd.c
@@ -0,0 +1,1722 @@
+/*
+ * File...........: linux/drivers/s390/block/dasd_eckd.c
+ * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
+ * Horst Hummel <Horst.Hummel@de.ibm.com>
+ * Carsten Otte <Cotte@de.ibm.com>
+ * Martin Schwidefsky <schwidefsky@de.ibm.com>
+ * Bugreports.to..: <Linux390@de.ibm.com>
+ * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
+ *
+ * $Revision: 1.69 $
+ */
+
+#include <linux/config.h>
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/hdreg.h> /* HDIO_GETGEO */
+#include <linux/bio.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <asm/debug.h>
+#include <asm/idals.h>
+#include <asm/ebcdic.h>
+#include <asm/io.h>
+#include <asm/todclk.h>
+#include <asm/uaccess.h>
+#include <asm/ccwdev.h>
+
+#include "dasd_int.h"
+#include "dasd_eckd.h"
+
+#ifdef PRINTK_HEADER
+#undef PRINTK_HEADER
+#endif /* PRINTK_HEADER */
+#define PRINTK_HEADER "dasd(eckd):"
+
+#define ECKD_C0(i) (i->home_bytes)
+#define ECKD_F(i) (i->formula)
+#define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
+ (i->factors.f_0x02.f1))
+#define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
+ (i->factors.f_0x02.f2))
+#define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
+ (i->factors.f_0x02.f3))
+#define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
+#define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
+#define ECKD_F6(i) (i->factor6)
+#define ECKD_F7(i) (i->factor7)
+#define ECKD_F8(i) (i->factor8)
+
+MODULE_LICENSE("GPL");
+
+static struct dasd_discipline dasd_eckd_discipline;
+
+struct dasd_eckd_private {
+ struct dasd_eckd_characteristics rdc_data;
+ struct dasd_eckd_confdata conf_data;
+ struct dasd_eckd_path path_data;
+ struct eckd_count count_area[5];
+ int init_cqr_status;
+ int uses_cdl;
+ struct attrib_data_t attrib; /* e.g. cache operations */
+};
+
+/* The ccw bus type uses this table to find devices that it sends to
+ * dasd_eckd_probe */
+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 (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},
+ { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), driver_info: 0x7},
+ { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), driver_info: 0x8},
+ { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), driver_info: 0x9},
+ { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), driver_info: 0xa},
+ { /* end of list */ },
+};
+
+MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
+
+static struct ccw_driver dasd_eckd_driver; /* see below */
+
+/* initial attempt at a probe function. this can be simplified once
+ * the other detection code is gone */
+static int
+dasd_eckd_probe (struct ccw_device *cdev)
+{
+ int ret;
+
+ ret = dasd_generic_probe (cdev, &dasd_eckd_discipline);
+ if (ret)
+ return ret;
+ ccw_device_set_options(cdev, CCWDEV_DO_PATHGROUP | CCWDEV_ALLOW_FORCE);
+ return 0;
+}
+
+static int
+dasd_eckd_set_online(struct ccw_device *cdev)
+{
+ return dasd_generic_set_online (cdev, &dasd_eckd_discipline);
+}
+
+static struct ccw_driver dasd_eckd_driver = {
+ .name = "dasd-eckd",
+ .owner = THIS_MODULE,
+ .ids = dasd_eckd_ids,
+ .probe = dasd_eckd_probe,
+ .remove = dasd_generic_remove,
+ .set_offline = dasd_generic_set_offline,
+ .set_online = dasd_eckd_set_online,
+ .notify = dasd_generic_notify,
+};
+
+static const int sizes_trk0[] = { 28, 148, 84 };
+#define LABEL_SIZE 140
+
+static inline unsigned int
+round_up_multiple(unsigned int no, unsigned int mult)
+{
+ int rem = no % mult;
+ return (rem ? no - rem + mult : no);
+}
+
+static inline unsigned int
+ceil_quot(unsigned int d1, unsigned int d2)
+{
+ 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
+recs_per_track(struct dasd_eckd_characteristics * rdc,
+ unsigned int kl, unsigned int dl)
+{
+ int dn, kn;
+
+ switch (rdc->dev_type) {
+ case 0x3380:
+ if (kl)
+ return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
+ ceil_quot(dl + 12, 32));
+ else
+ return 1499 / (15 + ceil_quot(dl + 12, 32));
+ case 0x3390:
+ dn = ceil_quot(dl + 6, 232) + 1;
+ if (kl) {
+ kn = ceil_quot(kl + 6, 232) + 1;
+ return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
+ 9 + ceil_quot(dl + 6 * dn, 34));
+ } else
+ return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
+ case 0x9345:
+ dn = ceil_quot(dl + 6, 232) + 1;
+ if (kl) {
+ kn = ceil_quot(kl + 6, 232) + 1;
+ return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
+ ceil_quot(dl + 6 * dn, 34));
+ } else
+ return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
+ }
+ return 0;
+}
+
+static inline void
+check_XRC (struct ccw1 *de_ccw,
+ struct DE_eckd_data *data,
+ struct dasd_device *device)
+{
+ struct dasd_eckd_private *private;
+
+ private = (struct dasd_eckd_private *) device->private;
+
+ /* 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->ep_sys_time = get_clock ();
+
+ de_ccw->count = sizeof (struct DE_eckd_data);
+ de_ccw->flags |= CCW_FLAG_SLI;
+ }
+
+ return;
+
+} /* end check_XRC */
+
+static inline void
+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;
+
+ private = (struct dasd_eckd_private *) device->private;
+
+ ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
+ ccw->flags = 0;
+ ccw->count = 16;
+ ccw->cda = (__u32) __pa(data);
+
+ memset(data, 0, sizeof (struct DE_eckd_data));
+ switch (cmd) {
+ case DASD_ECKD_CCW_READ_HOME_ADDRESS:
+ case DASD_ECKD_CCW_READ_RECORD_ZERO:
+ case DASD_ECKD_CCW_READ:
+ case DASD_ECKD_CCW_READ_MT:
+ case DASD_ECKD_CCW_READ_CKD:
+ case DASD_ECKD_CCW_READ_CKD_MT:
+ case DASD_ECKD_CCW_READ_KD:
+ case DASD_ECKD_CCW_READ_KD_MT:
+ case DASD_ECKD_CCW_READ_COUNT:
+ data->mask.perm = 0x1;
+ data->attributes.operation = private->attrib.operation;
+ break;
+ case DASD_ECKD_CCW_WRITE:
+ case DASD_ECKD_CCW_WRITE_MT:
+ case DASD_ECKD_CCW_WRITE_KD:
+ case DASD_ECKD_CCW_WRITE_KD_MT:
+ data->mask.perm = 0x02;
+ data->attributes.operation = private->attrib.operation;
+ 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);
+ break;
+ case DASD_ECKD_CCW_ERASE:
+ case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
+ case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
+ data->mask.perm = 0x3;
+ data->mask.auth = 0x1;
+ data->attributes.operation = DASD_BYPASS_CACHE;
+ check_XRC (ccw, data, device);
+ break;
+ default:
+ DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd);
+ break;
+ }
+
+ data->attributes.mode = 0x3; /* ECKD */
+
+ if ((private->rdc_data.cu_type == 0x2105 ||
+ private->rdc_data.cu_type == 0x2107 ||
+ private->rdc_data.cu_type == 0x1750)
+ && !(private->uses_cdl && trk < 2))
+ data->ga_extended |= 0x40; /* Regular Data Format Mode */
+
+ geo.cyl = private->rdc_data.no_cyl;
+ geo.head = private->rdc_data.trk_per_cyl;
+ beg.cyl = trk / geo.head;
+ beg.head = trk % geo.head;
+ end.cyl = totrk / geo.head;
+ end.head = totrk % geo.head;
+
+ /* check for sequential prestage - enhance cylinder range */
+ if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
+ data->attributes.operation == DASD_SEQ_ACCESS) {
+
+ if (end.cyl + private->attrib.nr_cyl < geo.cyl)
+ end.cyl += private->attrib.nr_cyl;
+ else
+ end.cyl = (geo.cyl - 1);
+ }
+
+ data->beg_ext.cyl = beg.cyl;
+ data->beg_ext.head = beg.head;
+ data->end_ext.cyl = end.cyl;
+ data->end_ext.head = end.head;
+}
+
+static inline 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)
+{
+ struct dasd_eckd_private *private;
+ int sector;
+ int dn, d;
+
+ private = (struct dasd_eckd_private *) device->private;
+
+ DBF_DEV_EVENT(DBF_INFO, device,
+ "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
+ trk, rec_on_trk, no_rec, cmd, reclen);
+
+ ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
+ ccw->flags = 0;
+ ccw->count = 16;
+ ccw->cda = (__u32) __pa(data);
+
+ memset(data, 0, sizeof (struct LO_eckd_data));
+ sector = 0;
+ if (rec_on_trk) {
+ switch (private->rdc_data.dev_type) {
+ case 0x3390:
+ dn = ceil_quot(reclen + 6, 232);
+ d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
+ sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
+ break;
+ case 0x3380:
+ d = 7 + ceil_quot(reclen + 12, 32);
+ sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
+ break;
+ }
+ }
+ data->sector = sector;
+ data->count = no_rec;
+ switch (cmd) {
+ case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
+ data->operation.orientation = 0x3;
+ data->operation.operation = 0x03;
+ break;
+ case DASD_ECKD_CCW_READ_HOME_ADDRESS:
+ data->operation.orientation = 0x3;
+ data->operation.operation = 0x16;
+ break;
+ case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
+ data->operation.orientation = 0x1;
+ data->operation.operation = 0x03;
+ data->count++;
+ break;
+ case DASD_ECKD_CCW_READ_RECORD_ZERO:
+ data->operation.orientation = 0x3;
+ data->operation.operation = 0x16;
+ data->count++;
+ break;
+ case DASD_ECKD_CCW_WRITE:
+ case DASD_ECKD_CCW_WRITE_MT:
+ case DASD_ECKD_CCW_WRITE_KD:
+ case DASD_ECKD_CCW_WRITE_KD_MT:
+ data->auxiliary.last_bytes_used = 0x1;
+ data->length = reclen;
+ data->operation.operation = 0x01;
+ break;
+ case DASD_ECKD_CCW_WRITE_CKD:
+ case DASD_ECKD_CCW_WRITE_CKD_MT:
+ data->auxiliary.last_bytes_used = 0x1;
+ data->length = reclen;
+ data->operation.operation = 0x03;
+ break;
+ case DASD_ECKD_CCW_READ:
+ case DASD_ECKD_CCW_READ_MT:
+ case DASD_ECKD_CCW_READ_KD:
+ case DASD_ECKD_CCW_READ_KD_MT:
+ data->auxiliary.last_bytes_used = 0x1;
+ data->length = reclen;
+ data->operation.operation = 0x06;
+ break;
+ case DASD_ECKD_CCW_READ_CKD:
+ case DASD_ECKD_CCW_READ_CKD_MT:
+ data->auxiliary.last_bytes_used = 0x1;
+ data->length = reclen;
+ data->operation.operation = 0x16;
+ break;
+ case DASD_ECKD_CCW_READ_COUNT:
+ data->operation.operation = 0x06;
+ break;
+ case DASD_ECKD_CCW_ERASE:
+ data->length = reclen;
+ data->auxiliary.last_bytes_used = 0x1;
+ data->operation.operation = 0x0b;
+ break;
+ default:
+ DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd);
+ }
+ data->seek_addr.cyl = data->search_arg.cyl =
+ trk / private->rdc_data.trk_per_cyl;
+ data->seek_addr.head = data->search_arg.head =
+ trk % private->rdc_data.trk_per_cyl;
+ data->search_arg.record = rec_on_trk;
+}
+
+/*
+ * Returns 1 if the block is one of the special blocks that needs
+ * to get read/written with the KD variant of the command.
+ * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
+ * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
+ * Luckily the KD variants differ only by one bit (0x08) from the
+ * normal variant. So don't wonder about code like:
+ * if (dasd_eckd_cdl_special(blk_per_trk, recid))
+ * ccw->cmd_code |= 0x8;
+ */
+static inline int
+dasd_eckd_cdl_special(int blk_per_trk, int recid)
+{
+ if (recid < 3)
+ return 1;
+ if (recid < blk_per_trk)
+ return 0;
+ if (recid < 2 * blk_per_trk)
+ return 1;
+ return 0;
+}
+
+/*
+ * Returns the record size for the special blocks of the cdl format.
+ * Only returns something useful if dasd_eckd_cdl_special is true
+ * for the recid.
+ */
+static inline int
+dasd_eckd_cdl_reclen(int recid)
+{
+ if (recid < 3)
+ return sizes_trk0[recid];
+ return LABEL_SIZE;
+}
+
+static int
+dasd_eckd_read_conf(struct dasd_device *device)
+{
+ void *conf_data;
+ int conf_len, conf_data_saved;
+ int rc;
+ __u8 lpm;
+ struct dasd_eckd_private *private;
+ struct dasd_eckd_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);
+ lpm = 0x80;
+ conf_data_saved = 0;
+
+ /* 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);
+ if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
+ MESSAGE(KERN_WARNING,
+ "Read configuration data returned "
+ "error %d", rc);
+ return rc;
+ }
+ if (conf_data == NULL) {
+ MESSAGE(KERN_WARNING, "%s", "No configuration "
+ "data retrieved");
+ continue; /* no errror */
+ }
+ if (conf_len != sizeof (struct dasd_eckd_confdata)) {
+ MESSAGE(KERN_WARNING,
+ "sizes of configuration data mismatch"
+ "%d (read) vs %ld (expected)",
+ conf_len,
+ sizeof (struct dasd_eckd_confdata));
+ kfree(conf_data);
+ continue; /* no errror */
+ }
+ /* save first valid configuration data */
+ if (!conf_data_saved){
+ memcpy(&private->conf_data, conf_data,
+ sizeof (struct dasd_eckd_confdata));
+ conf_data_saved++;
+ }
+ switch (((char *)conf_data)[242] & 0x07){
+ case 0x02:
+ path_data->npm |= lpm;
+ break;
+ case 0x03:
+ path_data->ppm |= lpm;
+ break;
+ }
+ kfree(conf_data);
+ }
+ }
+ return 0;
+}
+
+
+static int
+dasd_eckd_check_characteristics(struct dasd_device *device)
+{
+ struct dasd_eckd_private *private;
+ void *rdc_data;
+ int rc;
+
+ private = (struct dasd_eckd_private *) device->private;
+ if (private == NULL) {
+ private = kmalloc(sizeof(struct dasd_eckd_private),
+ GFP_KERNEL | GFP_DMA);
+ if (private == NULL) {
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "memory allocation failed for private "
+ "data");
+ return -ENOMEM;
+ }
+ memset(private, 0, sizeof(struct dasd_eckd_private));
+ device->private = (void *) private;
+ }
+ /* Invalidate status of initial analysis. */
+ private->init_cqr_status = -1;
+ /* Set default cache operations. */
+ private->attrib.operation = DASD_NORMAL_CACHE;
+ private->attrib.nr_cyl = 0;
+
+ /* Read Device Characteristics */
+ rdc_data = (void *) &(private->rdc_data);
+ rc = read_dev_chars(device->cdev, &rdc_data, 64);
+ if (rc) {
+ DEV_MESSAGE(KERN_WARNING, device,
+ "Read device characteristics returned error %d",
+ rc);
+ return rc;
+ }
+
+ DEV_MESSAGE(KERN_INFO, device,
+ "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d",
+ private->rdc_data.dev_type,
+ private->rdc_data.dev_model,
+ private->rdc_data.cu_type,
+ private->rdc_data.cu_model.model,
+ private->rdc_data.no_cyl,
+ private->rdc_data.trk_per_cyl,
+ private->rdc_data.sec_per_trk);
+
+ /* Read Configuration Data */
+ rc = dasd_eckd_read_conf (device);
+ return rc;
+
+}
+
+static struct dasd_ccw_req *
+dasd_eckd_analysis_ccw(struct dasd_device *device)
+{
+ struct dasd_eckd_private *private;
+ struct eckd_count *count_data;
+ struct LO_eckd_data *LO_data;
+ struct dasd_ccw_req *cqr;
+ struct ccw1 *ccw;
+ int cplength, datasize;
+ int i;
+
+ private = (struct dasd_eckd_private *) device->private;
+
+ cplength = 8;
+ datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
+ cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
+ cplength, datasize, device);
+ if (IS_ERR(cqr))
+ return cqr;
+ ccw = cqr->cpaddr;
+ /* Define extent for the first 3 tracks. */
+ define_extent(ccw++, cqr->data, 0, 2,
+ DASD_ECKD_CCW_READ_COUNT, device);
+ LO_data = cqr->data + sizeof (struct DE_eckd_data);
+ /* Locate record for the first 4 records on track 0. */
+ ccw[-1].flags |= CCW_FLAG_CC;
+ locate_record(ccw++, LO_data++, 0, 0, 4,
+ DASD_ECKD_CCW_READ_COUNT, device, 0);
+
+ count_data = private->count_area;
+ for (i = 0; i < 4; i++) {
+ ccw[-1].flags |= CCW_FLAG_CC;
+ ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
+ ccw->flags = 0;
+ ccw->count = 8;
+ ccw->cda = (__u32)(addr_t) count_data;
+ ccw++;
+ count_data++;
+ }
+
+ /* Locate record for the first record on track 2. */
+ ccw[-1].flags |= CCW_FLAG_CC;
+ locate_record(ccw++, LO_data++, 2, 0, 1,
+ DASD_ECKD_CCW_READ_COUNT, device, 0);
+ /* Read count ccw. */
+ ccw[-1].flags |= CCW_FLAG_CC;
+ ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
+ ccw->flags = 0;
+ ccw->count = 8;
+ ccw->cda = (__u32)(addr_t) count_data;
+
+ cqr->device = device;
+ cqr->retries = 0;
+ cqr->buildclk = get_clock();
+ cqr->status = DASD_CQR_FILLED;
+ return cqr;
+}
+
+/*
+ * This is the callback function for the init_analysis cqr. It saves
+ * the status of the initial analysis ccw before it frees it and kicks
+ * the device to continue the startup sequence. This will call
+ * dasd_eckd_do_analysis again (if the devices has not been marked
+ * for deletion in the meantime).
+ */
+static void
+dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data)
+{
+ struct dasd_eckd_private *private;
+ struct dasd_device *device;
+
+ device = init_cqr->device;
+ private = (struct dasd_eckd_private *) device->private;
+ private->init_cqr_status = init_cqr->status;
+ dasd_sfree_request(init_cqr, device);
+ dasd_kick_device(device);
+}
+
+static int
+dasd_eckd_start_analysis(struct dasd_device *device)
+{
+ struct dasd_eckd_private *private;
+ struct dasd_ccw_req *init_cqr;
+
+ private = (struct dasd_eckd_private *) device->private;
+ init_cqr = dasd_eckd_analysis_ccw(device);
+ if (IS_ERR(init_cqr))
+ return PTR_ERR(init_cqr);
+ init_cqr->callback = dasd_eckd_analysis_callback;
+ init_cqr->callback_data = NULL;
+ init_cqr->expires = 5*HZ;
+ dasd_add_request_head(init_cqr);
+ return -EAGAIN;
+}
+
+static int
+dasd_eckd_end_analysis(struct dasd_device *device)
+{
+ struct dasd_eckd_private *private;
+ struct eckd_count *count_area;
+ unsigned int sb, blk_per_trk;
+ int status, i;
+
+ private = (struct dasd_eckd_private *) device->private;
+ status = private->init_cqr_status;
+ private->init_cqr_status = -1;
+ if (status != DASD_CQR_DONE) {
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "volume analysis returned unformatted disk");
+ return -EMEDIUMTYPE;
+ }
+
+ private->uses_cdl = 1;
+ /* Calculate number of blocks/records per track. */
+ blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block);
+ /* Check Track 0 for Compatible Disk Layout */
+ count_area = NULL;
+ for (i = 0; i < 3; i++) {
+ if (private->count_area[i].kl != 4 ||
+ private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
+ private->uses_cdl = 0;
+ break;
+ }
+ }
+ if (i == 3)
+ count_area = &private->count_area[4];
+
+ if (private->uses_cdl == 0) {
+ for (i = 0; i < 5; i++) {
+ if ((private->count_area[i].kl != 0) ||
+ (private->count_area[i].dl !=
+ private->count_area[0].dl))
+ break;
+ }
+ if (i == 5)
+ count_area = &private->count_area[0];
+ } else {
+ if (private->count_area[3].record == 1)
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "Trk 0: no records after VTOC!");
+ }
+ if (count_area != NULL && count_area->kl == 0) {
+ /* we found notthing violating our disk layout */
+ if (dasd_check_blocksize(count_area->dl) == 0)
+ device->bp_block = count_area->dl;
+ }
+ if (device->bp_block == 0) {
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "Volume has incompatible disk layout");
+ return -EMEDIUMTYPE;
+ }
+ device->s2b_shift = 0; /* bits to shift 512 to get a block */
+ for (sb = 512; sb < device->bp_block; sb = sb << 1)
+ device->s2b_shift++;
+
+ blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block);
+ device->blocks = (private->rdc_data.no_cyl *
+ private->rdc_data.trk_per_cyl *
+ blk_per_trk);
+
+ DEV_MESSAGE(KERN_INFO, device,
+ "(%dkB blks): %dkB at %dkB/trk %s",
+ (device->bp_block >> 10),
+ ((private->rdc_data.no_cyl *
+ private->rdc_data.trk_per_cyl *
+ blk_per_trk * (device->bp_block >> 9)) >> 1),
+ ((blk_per_trk * device->bp_block) >> 10),
+ private->uses_cdl ?
+ "compatible disk layout" : "linux disk layout");
+
+ return 0;
+}
+
+static int
+dasd_eckd_do_analysis(struct dasd_device *device)
+{
+ struct dasd_eckd_private *private;
+
+ private = (struct dasd_eckd_private *) device->private;
+ if (private->init_cqr_status < 0)
+ return dasd_eckd_start_analysis(device);
+ else
+ return dasd_eckd_end_analysis(device);
+}
+
+static int
+dasd_eckd_fill_geometry(struct dasd_device *device, struct hd_geometry *geo)
+{
+ struct dasd_eckd_private *private;
+
+ private = (struct dasd_eckd_private *) device->private;
+ if (dasd_check_blocksize(device->bp_block) == 0) {
+ geo->sectors = recs_per_track(&private->rdc_data,
+ 0, device->bp_block);
+ }
+ geo->cylinders = private->rdc_data.no_cyl;
+ geo->heads = private->rdc_data.trk_per_cyl;
+ return 0;
+}
+
+static struct dasd_ccw_req *
+dasd_eckd_format_device(struct dasd_device * device,
+ struct format_data_t * fdata)
+{
+ struct dasd_eckd_private *private;
+ struct dasd_ccw_req *fcp;
+ struct eckd_count *ect;
+ struct ccw1 *ccw;
+ void *data;
+ int rpt, cyl, head;
+ int cplength, datasize;
+ int i;
+
+ private = (struct dasd_eckd_private *) device->private;
+ rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
+ cyl = fdata->start_unit / private->rdc_data.trk_per_cyl;
+ head = fdata->start_unit % private->rdc_data.trk_per_cyl;
+
+ /* Sanity checks. */
+ if (fdata->start_unit >=
+ (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) {
+ DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!",
+ fdata->start_unit);
+ return ERR_PTR(-EINVAL);
+ }
+ if (fdata->start_unit > fdata->stop_unit) {
+ DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.",
+ fdata->start_unit);
+ return ERR_PTR(-EINVAL);
+ }
+ if (dasd_check_blocksize(fdata->blksize) != 0) {
+ DEV_MESSAGE(KERN_WARNING, device,
+ "Invalid blocksize %d...terminating!",
+ fdata->blksize);
+ return ERR_PTR(-EINVAL);
+ }
+
+ /*
+ * fdata->intensity is a bit string that tells us what to do:
+ * Bit 0: write record zero
+ * Bit 1: write home address, currently not supported
+ * Bit 2: invalidate tracks
+ * Bit 3: use OS/390 compatible disk layout (cdl)
+ * Only some bit combinations do make sense.
+ */
+ switch (fdata->intensity) {
+ case 0x00: /* Normal format */
+ case 0x08: /* Normal format, use cdl. */
+ cplength = 2 + rpt;
+ datasize = sizeof(struct DE_eckd_data) +
+ sizeof(struct LO_eckd_data) +
+ rpt * sizeof(struct eckd_count);
+ break;
+ case 0x01: /* Write record zero and format track. */
+ case 0x09: /* Write record zero and format track, use cdl. */
+ cplength = 3 + rpt;
+ datasize = sizeof(struct DE_eckd_data) +
+ sizeof(struct LO_eckd_data) +
+ sizeof(struct eckd_count) +
+ rpt * sizeof(struct eckd_count);
+ break;
+ case 0x04: /* Invalidate track. */
+ case 0x0c: /* Invalidate track, use cdl. */
+ cplength = 3;
+ datasize = sizeof(struct DE_eckd_data) +
+ sizeof(struct LO_eckd_data) +
+ sizeof(struct eckd_count);
+ break;
+ default:
+ DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.",
+ fdata->intensity);
+ return ERR_PTR(-EINVAL);
+ }
+ /* Allocate the format ccw request. */
+ fcp = dasd_smalloc_request(dasd_eckd_discipline.name,
+ cplength, datasize, device);
+ if (IS_ERR(fcp))
+ return fcp;
+
+ data = fcp->data;
+ ccw = fcp->cpaddr;
+
+ switch (fdata->intensity & ~0x08) {
+ case 0x00: /* Normal format. */
+ define_extent(ccw++, (struct DE_eckd_data *) data,
+ fdata->start_unit, fdata->start_unit,
+ DASD_ECKD_CCW_WRITE_CKD, device);
+ data += sizeof(struct DE_eckd_data);
+ ccw[-1].flags |= CCW_FLAG_CC;
+ locate_record(ccw++, (struct LO_eckd_data *) data,
+ fdata->start_unit, 0, rpt,
+ DASD_ECKD_CCW_WRITE_CKD, device,
+ fdata->blksize);
+ data += sizeof(struct LO_eckd_data);
+ break;
+ case 0x01: /* Write record zero + format track. */
+ define_extent(ccw++, (struct DE_eckd_data *) data,
+ fdata->start_unit, fdata->start_unit,
+ DASD_ECKD_CCW_WRITE_RECORD_ZERO,
+ device);
+ data += sizeof(struct DE_eckd_data);
+ ccw[-1].flags |= CCW_FLAG_CC;
+ locate_record(ccw++, (struct LO_eckd_data *) data,
+ fdata->start_unit, 0, rpt + 1,
+ DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
+ device->bp_block);
+ data += sizeof(struct LO_eckd_data);
+ break;
+ case 0x04: /* Invalidate track. */
+ define_extent(ccw++, (struct DE_eckd_data *) data,
+ fdata->start_unit, fdata->start_unit,
+ DASD_ECKD_CCW_WRITE_CKD, device);
+ data += sizeof(struct DE_eckd_data);
+ ccw[-1].flags |= CCW_FLAG_CC;
+ locate_record(ccw++, (struct LO_eckd_data *) data,
+ fdata->start_unit, 0, 1,
+ DASD_ECKD_CCW_WRITE_CKD, device, 8);
+ data += sizeof(struct LO_eckd_data);
+ break;
+ }
+ if (fdata->intensity & 0x01) { /* write record zero */
+ ect = (struct eckd_count *) data;
+ data += sizeof(struct eckd_count);
+ ect->cyl = cyl;
+ ect->head = head;
+ ect->record = 0;
+ ect->kl = 0;
+ ect->dl = 8;
+ ccw[-1].flags |= CCW_FLAG_CC;
+ ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
+ ccw->flags = CCW_FLAG_SLI;
+ ccw->count = 8;
+ ccw->cda = (__u32)(addr_t) ect;
+ ccw++;
+ }
+ if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */
+ ect = (struct eckd_count *) data;
+ data += sizeof(struct eckd_count);
+ ect->cyl = cyl;
+ ect->head = head;
+ ect->record = 1;
+ ect->kl = 0;
+ ect->dl = 0;
+ ccw[-1].flags |= CCW_FLAG_CC;
+ ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
+ ccw->flags = CCW_FLAG_SLI;
+ ccw->count = 8;
+ ccw->cda = (__u32)(addr_t) ect;
+ } else { /* write remaining records */
+ for (i = 0; i < rpt; i++) {
+ ect = (struct eckd_count *) data;
+ data += sizeof(struct eckd_count);
+ ect->cyl = cyl;
+ ect->head = head;
+ ect->record = i + 1;
+ ect->kl = 0;
+ ect->dl = fdata->blksize;
+ /* Check for special tracks 0-1 when formatting CDL */
+ if ((fdata->intensity & 0x08) &&
+ fdata->start_unit == 0) {
+ if (i < 3) {
+ ect->kl = 4;
+ ect->dl = sizes_trk0[i] - 4;
+ }
+ }
+ if ((fdata->intensity & 0x08) &&
+ fdata->start_unit == 1) {
+ ect->kl = 44;
+ ect->dl = LABEL_SIZE - 44;
+ }
+ ccw[-1].flags |= CCW_FLAG_CC;
+ ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
+ ccw->flags = CCW_FLAG_SLI;
+ ccw->count = 8;
+ ccw->cda = (__u32)(addr_t) ect;
+ ccw++;
+ }
+ }
+ fcp->device = device;
+ fcp->retries = 2; /* set retry counter to enable ERP */
+ fcp->buildclk = get_clock();
+ fcp->status = DASD_CQR_FILLED;
+ return fcp;
+}
+
+static dasd_era_t
+dasd_eckd_examine_error(struct dasd_ccw_req * cqr, struct irb * irb)
+{
+ struct dasd_device *device = (struct dasd_device *) cqr->device;
+ struct ccw_device *cdev = device->cdev;
+
+ if (irb->scsw.cstat == 0x00 &&
+ irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
+ return dasd_era_none;
+
+ switch (cdev->id.cu_type) {
+ case 0x3990:
+ case 0x2105:
+ case 0x2107:
+ case 0x1750:
+ return dasd_3990_erp_examine(cqr, irb);
+ case 0x9343:
+ return dasd_9343_erp_examine(cqr, irb);
+ case 0x3880:
+ default:
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "default (unknown CU type) - RECOVERABLE return");
+ return dasd_era_recover;
+ }
+}
+
+static dasd_erp_fn_t
+dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
+{
+ struct dasd_device *device = (struct dasd_device *) cqr->device;
+ struct ccw_device *cdev = device->cdev;
+
+ switch (cdev->id.cu_type) {
+ case 0x3990:
+ case 0x2105:
+ case 0x2107:
+ case 0x1750:
+ return dasd_3990_erp_action;
+ case 0x9343:
+ case 0x3880:
+ default:
+ return dasd_default_erp_action;
+ }
+}
+
+static dasd_erp_fn_t
+dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
+{
+ return dasd_default_erp_postaction;
+}
+
+static struct dasd_ccw_req *
+dasd_eckd_build_cp(struct dasd_device * device, struct request *req)
+{
+ struct dasd_eckd_private *private;
+ unsigned long *idaws;
+ struct LO_eckd_data *LO_data;
+ struct dasd_ccw_req *cqr;
+ struct ccw1 *ccw;
+ struct bio *bio;
+ struct bio_vec *bv;
+ char *dst;
+ unsigned int blksize, blk_per_trk, off;
+ int count, cidaw, cplength, datasize;
+ sector_t recid, first_rec, last_rec;
+ sector_t first_trk, last_trk;
+ unsigned int first_offs, last_offs;
+ unsigned char cmd, rcmd;
+ int i;
+
+ private = (struct dasd_eckd_private *) device->private;
+ if (rq_data_dir(req) == READ)
+ cmd = DASD_ECKD_CCW_READ_MT;
+ else if (rq_data_dir(req) == WRITE)
+ cmd = DASD_ECKD_CCW_WRITE_MT;
+ else
+ return ERR_PTR(-EINVAL);
+ /* Calculate number of blocks/records per track. */
+ blksize = device->bp_block;
+ blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
+ /* Calculate record id of first and last block. */
+ first_rec = first_trk = req->sector >> device->s2b_shift;
+ first_offs = sector_div(first_trk, blk_per_trk);
+ last_rec = last_trk =
+ (req->sector + req->nr_sectors - 1) >> device->s2b_shift;
+ last_offs = sector_div(last_trk, blk_per_trk);
+ /* Check struct bio and count the number of blocks for the request. */
+ count = 0;
+ cidaw = 0;
+ rq_for_each_bio(bio, req) {
+ bio_for_each_segment(bv, bio, i) {
+ if (bv->bv_len & (blksize - 1))
+ /* Eckd can only do full blocks. */
+ return ERR_PTR(-EINVAL);
+ count += bv->bv_len >> (device->s2b_shift + 9);
+#if defined(CONFIG_ARCH_S390X)
+ if (idal_is_needed (page_address(bv->bv_page),
+ bv->bv_len))
+ cidaw += bv->bv_len >> (device->s2b_shift + 9);
+#endif
+ }
+ }
+ /* Paranoia. */
+ if (count != last_rec - first_rec + 1)
+ return ERR_PTR(-EINVAL);
+ /* 1x define extent + 1x locate record + number of blocks */
+ cplength = 2 + count;
+ /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
+ datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) +
+ cidaw * sizeof(unsigned long);
+ /* Find out the number of additional locate record ccws for cdl. */
+ if (private->uses_cdl && first_rec < 2*blk_per_trk) {
+ if (last_rec >= 2*blk_per_trk)
+ count = 2*blk_per_trk - first_rec;
+ cplength += count;
+ datasize += count*sizeof(struct LO_eckd_data);
+ }
+ /* Allocate the ccw request. */
+ cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
+ cplength, datasize, device);
+ if (IS_ERR(cqr))
+ return cqr;
+ ccw = cqr->cpaddr;
+ /* First ccw is define extent. */
+ define_extent(ccw++, cqr->data, first_trk, last_trk, cmd, device);
+ /* Build locate_record+read/write/ccws. */
+ idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data));
+ LO_data = (struct LO_eckd_data *) (idaws + cidaw);
+ recid = first_rec;
+ if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
+ /* Only standard blocks so there is just one locate record. */
+ ccw[-1].flags |= CCW_FLAG_CC;
+ locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
+ last_rec - recid + 1, cmd, device, blksize);
+ }
+ rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) {
+ dst = page_address(bv->bv_page) + bv->bv_offset;
+ if (dasd_page_cache) {
+ char *copy = kmem_cache_alloc(dasd_page_cache,
+ SLAB_DMA | __GFP_NOWARN);
+ if (copy && rq_data_dir(req) == WRITE)
+ memcpy(copy + bv->bv_offset, dst, bv->bv_len);
+ if (copy)
+ dst = copy + bv->bv_offset;
+ }
+ for (off = 0; off < bv->bv_len; off += blksize) {
+ sector_t trkid = recid;
+ unsigned int recoffs = sector_div(trkid, blk_per_trk);
+ rcmd = cmd;
+ count = blksize;
+ /* Locate record for cdl special block ? */
+ if (private->uses_cdl && recid < 2*blk_per_trk) {
+ if (dasd_eckd_cdl_special(blk_per_trk, recid)){
+ rcmd |= 0x8;
+ count = dasd_eckd_cdl_reclen(recid);
+ if (count < blksize)
+ memset(dst + count, 0xe5,
+ blksize - count);
+ }
+ ccw[-1].flags |= CCW_FLAG_CC;
+ locate_record(ccw++, LO_data++,
+ trkid, recoffs + 1,
+ 1, rcmd, device, count);
+ }
+ /* Locate record for standard blocks ? */
+ if (private->uses_cdl && recid == 2*blk_per_trk) {
+ ccw[-1].flags |= CCW_FLAG_CC;
+ locate_record(ccw++, LO_data++,
+ trkid, recoffs + 1,
+ last_rec - recid + 1,
+ cmd, device, count);
+ }
+ /* Read/write ccw. */
+ ccw[-1].flags |= CCW_FLAG_CC;
+ ccw->cmd_code = rcmd;
+ ccw->count = count;
+ if (idal_is_needed(dst, blksize)) {
+ ccw->cda = (__u32)(addr_t) idaws;
+ ccw->flags = CCW_FLAG_IDA;
+ idaws = idal_create_words(idaws, dst, blksize);
+ } else {
+ ccw->cda = (__u32)(addr_t) dst;
+ ccw->flags = 0;
+ }
+ ccw++;
+ dst += blksize;
+ recid++;
+ }
+ }
+ cqr->device = device;
+ cqr->expires = 5 * 60 * HZ; /* 5 minutes */
+ cqr->lpm = private->path_data.ppm;
+ cqr->retries = 256;
+ cqr->buildclk = get_clock();
+ cqr->status = DASD_CQR_FILLED;
+ return cqr;
+}
+
+static int
+dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
+{
+ struct dasd_eckd_private *private;
+ struct ccw1 *ccw;
+ struct bio *bio;
+ struct bio_vec *bv;
+ char *dst, *cda;
+ unsigned int blksize, blk_per_trk, off;
+ sector_t recid;
+ int i, status;
+
+ if (!dasd_page_cache)
+ goto out;
+ private = (struct dasd_eckd_private *) cqr->device->private;
+ blksize = cqr->device->bp_block;
+ blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
+ recid = req->sector >> cqr->device->s2b_shift;
+ ccw = cqr->cpaddr;
+ /* Skip over define extent & locate record. */
+ ccw++;
+ if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
+ ccw++;
+ rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) {
+ dst = page_address(bv->bv_page) + bv->bv_offset;
+ for (off = 0; off < bv->bv_len; off += blksize) {
+ /* Skip locate record. */
+ if (private->uses_cdl && recid <= 2*blk_per_trk)
+ ccw++;
+ if (dst) {
+ if (ccw->flags & CCW_FLAG_IDA)
+ cda = *((char **)((addr_t) ccw->cda));
+ else
+ cda = (char *)((addr_t) ccw->cda);
+ if (dst != cda) {
+ if (rq_data_dir(req) == READ)
+ memcpy(dst, cda, bv->bv_len);
+ kmem_cache_free(dasd_page_cache,
+ (void *)((addr_t)cda & PAGE_MASK));
+ }
+ dst = NULL;
+ }
+ ccw++;
+ recid++;
+ }
+ }
+out:
+ status = cqr->status == DASD_CQR_DONE;
+ dasd_sfree_request(cqr, cqr->device);
+ return status;
+}
+
+static int
+dasd_eckd_fill_info(struct dasd_device * device,
+ struct dasd_information2_t * info)
+{
+ struct dasd_eckd_private *private;
+
+ private = (struct dasd_eckd_private *) device->private;
+ info->label_block = 2;
+ info->FBA_layout = private->uses_cdl ? 0 : 1;
+ info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
+ info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
+ memcpy(info->characteristics, &private->rdc_data,
+ sizeof(struct dasd_eckd_characteristics));
+ info->confdata_size = sizeof (struct dasd_eckd_confdata);
+ memcpy(info->configuration_data, &private->conf_data,
+ sizeof (struct dasd_eckd_confdata));
+ return 0;
+}
+
+/*
+ * SECTION: ioctl functions for eckd devices.
+ */
+
+/*
+ * Release device ioctl.
+ * Buils a channel programm to releases a prior reserved
+ * (see dasd_eckd_reserve) device.
+ */
+static int
+dasd_eckd_release(struct block_device *bdev, int no, long args)
+{
+ struct dasd_device *device;
+ struct dasd_ccw_req *cqr;
+ int rc;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ device = bdev->bd_disk->private_data;
+ if (device == NULL)
+ return -ENODEV;
+
+ cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
+ 1, 32, device);
+ if (IS_ERR(cqr)) {
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "Could not allocate initialization request");
+ return PTR_ERR(cqr);
+ }
+ cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE;
+ cqr->cpaddr->flags |= CCW_FLAG_SLI;
+ cqr->cpaddr->count = 32;
+ cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
+ cqr->device = device;
+ clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
+ cqr->retries = 0;
+ cqr->expires = 2 * HZ;
+ cqr->buildclk = get_clock();
+ cqr->status = DASD_CQR_FILLED;
+
+ rc = dasd_sleep_on_immediatly(cqr);
+
+ dasd_sfree_request(cqr, cqr->device);
+ return rc;
+}
+
+/*
+ * Reserve device ioctl.
+ * Options are set to 'synchronous wait for interrupt' and
+ * 'timeout the request'. This leads to a terminate IO if
+ * the interrupt is outstanding for a certain time.
+ */
+static int
+dasd_eckd_reserve(struct block_device *bdev, int no, long args)
+{
+ struct dasd_device *device;
+ struct dasd_ccw_req *cqr;
+ int rc;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ device = bdev->bd_disk->private_data;
+ if (device == NULL)
+ return -ENODEV;
+
+ cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
+ 1, 32, device);
+ if (IS_ERR(cqr)) {
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "Could not allocate initialization request");
+ return PTR_ERR(cqr);
+ }
+ cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE;
+ cqr->cpaddr->flags |= CCW_FLAG_SLI;
+ cqr->cpaddr->count = 32;
+ cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
+ cqr->device = device;
+ clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
+ cqr->retries = 0;
+ cqr->expires = 2 * HZ;
+ cqr->buildclk = get_clock();
+ cqr->status = DASD_CQR_FILLED;
+
+ rc = dasd_sleep_on_immediatly(cqr);
+
+ dasd_sfree_request(cqr, cqr->device);
+ return rc;
+}
+
+/*
+ * Steal lock ioctl - unconditional reserve device.
+ * Buils a channel programm to break a device's reservation.
+ * (unconditional reserve)
+ */
+static int
+dasd_eckd_steal_lock(struct block_device *bdev, int no, long args)
+{
+ struct dasd_device *device;
+ struct dasd_ccw_req *cqr;
+ int rc;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ device = bdev->bd_disk->private_data;
+ if (device == NULL)
+ return -ENODEV;
+
+ cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
+ 1, 32, device);
+ if (IS_ERR(cqr)) {
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "Could not allocate initialization request");
+ return PTR_ERR(cqr);
+ }
+ cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK;
+ cqr->cpaddr->flags |= CCW_FLAG_SLI;
+ cqr->cpaddr->count = 32;
+ cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
+ cqr->device = device;
+ clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
+ cqr->retries = 0;
+ cqr->expires = 2 * HZ;
+ cqr->buildclk = get_clock();
+ cqr->status = DASD_CQR_FILLED;
+
+ rc = dasd_sleep_on_immediatly(cqr);
+
+ dasd_sfree_request(cqr, cqr->device);
+ return rc;
+}
+
+/*
+ * Read performance statistics
+ */
+static int
+dasd_eckd_performance(struct block_device *bdev, int no, long args)
+{
+ struct dasd_device *device;
+ struct dasd_psf_prssd_data *prssdp;
+ struct dasd_rssd_perf_stats_t *stats;
+ struct dasd_ccw_req *cqr;
+ struct ccw1 *ccw;
+ int rc;
+
+ device = bdev->bd_disk->private_data;
+ if (device == NULL)
+ return -ENODEV;
+
+ cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
+ 1 /* PSF */ + 1 /* RSSD */ ,
+ (sizeof (struct dasd_psf_prssd_data) +
+ sizeof (struct dasd_rssd_perf_stats_t)),
+ device);
+ if (IS_ERR(cqr)) {
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "Could not allocate initialization request");
+ return PTR_ERR(cqr);
+ }
+ cqr->device = device;
+ cqr->retries = 0;
+ cqr->expires = 10 * HZ;
+
+ /* Prepare for Read Subsystem Data */
+ prssdp = (struct dasd_psf_prssd_data *) cqr->data;
+ memset(prssdp, 0, sizeof (struct dasd_psf_prssd_data));
+ prssdp->order = PSF_ORDER_PRSSD;
+ prssdp->suborder = 0x01; /* Perfomance Statistics */
+ prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
+
+ ccw = cqr->cpaddr;
+ ccw->cmd_code = DASD_ECKD_CCW_PSF;
+ ccw->count = sizeof (struct dasd_psf_prssd_data);
+ ccw->flags |= CCW_FLAG_CC;
+ ccw->cda = (__u32)(addr_t) prssdp;
+
+ /* Read Subsystem Data - Performance Statistics */
+ stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
+ memset(stats, 0, sizeof (struct dasd_rssd_perf_stats_t));
+
+ ccw++;
+ ccw->cmd_code = DASD_ECKD_CCW_RSSD;
+ ccw->count = sizeof (struct dasd_rssd_perf_stats_t);
+ ccw->cda = (__u32)(addr_t) stats;
+
+ cqr->buildclk = get_clock();
+ cqr->status = DASD_CQR_FILLED;
+ rc = dasd_sleep_on(cqr);
+ if (rc == 0) {
+ /* Prepare for Read Subsystem Data */
+ prssdp = (struct dasd_psf_prssd_data *) cqr->data;
+ stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
+ rc = copy_to_user((long __user *) args, (long *) stats,
+ sizeof(struct dasd_rssd_perf_stats_t));
+ }
+ dasd_sfree_request(cqr, cqr->device);
+ return rc;
+}
+
+/*
+ * Get attributes (cache operations)
+ * Returnes the cache attributes used in Define Extend (DE).
+ */
+static int
+dasd_eckd_get_attrib (struct block_device *bdev, int no, long args)
+{
+ struct dasd_device *device;
+ struct dasd_eckd_private *private;
+ struct attrib_data_t attrib;
+ int rc;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (!args)
+ return -EINVAL;
+
+ device = bdev->bd_disk->private_data;
+ if (device == NULL)
+ return -ENODEV;
+
+ private = (struct dasd_eckd_private *) device->private;
+ attrib = private->attrib;
+
+ rc = copy_to_user((long __user *) args, (long *) &attrib,
+ sizeof (struct attrib_data_t));
+
+ return rc;
+}
+
+/*
+ * Set attributes (cache operations)
+ * Stores the attributes for cache operation to be used in Define Extend (DE).
+ */
+static int
+dasd_eckd_set_attrib(struct block_device *bdev, int no, long args)
+{
+ struct dasd_device *device;
+ struct dasd_eckd_private *private;
+ struct attrib_data_t attrib;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (!args)
+ return -EINVAL;
+
+ device = bdev->bd_disk->private_data;
+ if (device == NULL)
+ return -ENODEV;
+
+ if (copy_from_user(&attrib, (void __user *) args,
+ sizeof (struct attrib_data_t))) {
+ return -EFAULT;
+ }
+ private = (struct dasd_eckd_private *) device->private;
+ private->attrib = attrib;
+
+ DEV_MESSAGE(KERN_INFO, device,
+ "cache operation mode set to %x (%i cylinder prestage)",
+ private->attrib.operation, private->attrib.nr_cyl);
+ return 0;
+}
+
+/*
+ * Print sense data and related channel program.
+ * Parts are printed because printk buffer is only 1024 bytes.
+ */
+static void
+dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
+ struct irb *irb)
+{
+ char *page;
+ struct ccw1 *act, *end, *last;
+ int len, sl, sct, count;
+
+ page = (char *) get_zeroed_page(GFP_ATOMIC);
+ if (page == NULL) {
+ DEV_MESSAGE(KERN_ERR, device, " %s",
+ "No memory to dump sense data");
+ return;
+ }
+ len = sprintf(page, KERN_ERR PRINTK_HEADER
+ " I/O status report for device %s:\n",
+ device->cdev->dev.bus_id);
+ len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+ " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
+ irb->scsw.cstat, irb->scsw.dstat);
+ len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+ " device %s: Failing CCW: %p\n",
+ device->cdev->dev.bus_id,
+ (void *) (addr_t) irb->scsw.cpa);
+ if (irb->esw.esw0.erw.cons) {
+ for (sl = 0; sl < 4; sl++) {
+ len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+ " Sense(hex) %2d-%2d:",
+ (8 * sl), ((8 * sl) + 7));
+
+ for (sct = 0; sct < 8; sct++) {
+ len += sprintf(page + len, " %02x",
+ irb->ecw[8 * sl + sct]);
+ }
+ len += sprintf(page + len, "\n");
+ }
+
+ if (irb->ecw[27] & DASD_SENSE_BIT_0) {
+ /* 24 Byte Sense Data */
+ len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+ " 24 Byte: %x MSG %x, "
+ "%s MSGb to SYSOP\n",
+ irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
+ irb->ecw[1] & 0x10 ? "" : "no");
+ } else {
+ /* 32 Byte Sense Data */
+ len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+ " 32 Byte: Format: %x "
+ "Exception class %x\n",
+ irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
+ }
+ } else {
+ len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+ " SORRY - NO VALID SENSE AVAILABLE\n");
+ }
+ MESSAGE_LOG(KERN_ERR, "%s",
+ page + sizeof(KERN_ERR PRINTK_HEADER));
+
+ /* dump the Channel Program */
+ /* print first CCWs (maximum 8) */
+ act = req->cpaddr;
+ for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
+ end = min(act + 8, last);
+ len = sprintf(page, KERN_ERR PRINTK_HEADER
+ " Related CP in req: %p\n", req);
+ while (act <= end) {
+ len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+ " CCW %p: %08X %08X DAT:",
+ act, ((int *) act)[0], ((int *) act)[1]);
+ for (count = 0; count < 32 && count < act->count;
+ count += sizeof(int))
+ len += sprintf(page + len, " %08X",
+ ((int *) (addr_t) act->cda)
+ [(count>>2)]);
+ len += sprintf(page + len, "\n");
+ act++;
+ }
+ MESSAGE_LOG(KERN_ERR, "%s",
+ page + sizeof(KERN_ERR PRINTK_HEADER));
+
+ /* print failing CCW area */
+ len = 0;
+ if (act < ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2) {
+ act = ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2;
+ len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
+ }
+ end = min((struct ccw1 *)(addr_t) irb->scsw.cpa + 2, last);
+ while (act <= end) {
+ len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+ " CCW %p: %08X %08X DAT:",
+ act, ((int *) act)[0], ((int *) act)[1]);
+ for (count = 0; count < 32 && count < act->count;
+ count += sizeof(int))
+ len += sprintf(page + len, " %08X",
+ ((int *) (addr_t) act->cda)
+ [(count>>2)]);
+ len += sprintf(page + len, "\n");
+ act++;
+ }
+
+ /* print last CCWs */
+ if (act < last - 2) {
+ act = last - 2;
+ len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
+ }
+ while (act <= last) {
+ len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+ " CCW %p: %08X %08X DAT:",
+ act, ((int *) act)[0], ((int *) act)[1]);
+ for (count = 0; count < 32 && count < act->count;
+ count += sizeof(int))
+ len += sprintf(page + len, " %08X",
+ ((int *) (addr_t) act->cda)
+ [(count>>2)]);
+ len += sprintf(page + len, "\n");
+ act++;
+ }
+ if (len > 0)
+ MESSAGE_LOG(KERN_ERR, "%s",
+ page + sizeof(KERN_ERR PRINTK_HEADER));
+ free_page((unsigned long) page);
+}
+
+/*
+ * max_blocks is dependent on the amount of storage that is available
+ * in the static io buffer for each device. Currently each device has
+ * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
+ * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
+ * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
+ * addition we have one define extent ccw + 16 bytes of data and one
+ * locate record ccw + 16 bytes of data. That makes:
+ * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
+ * We want to fit two into the available memory so that we can immediately
+ * start the next request if one finishes off. That makes 249.5 blocks
+ * for one request. Give a little safety and the result is 240.
+ */
+static struct dasd_discipline dasd_eckd_discipline = {
+ .owner = THIS_MODULE,
+ .name = "ECKD",
+ .ebcname = "ECKD",
+ .max_blocks = 240,
+ .check_device = dasd_eckd_check_characteristics,
+ .do_analysis = dasd_eckd_do_analysis,
+ .fill_geometry = dasd_eckd_fill_geometry,
+ .start_IO = dasd_start_IO,
+ .term_IO = dasd_term_IO,
+ .format_device = dasd_eckd_format_device,
+ .examine_error = dasd_eckd_examine_error,
+ .erp_action = dasd_eckd_erp_action,
+ .erp_postaction = dasd_eckd_erp_postaction,
+ .build_cp = dasd_eckd_build_cp,
+ .free_cp = dasd_eckd_free_cp,
+ .dump_sense = dasd_eckd_dump_sense,
+ .fill_info = dasd_eckd_fill_info,
+};
+
+static int __init
+dasd_eckd_init(void)
+{
+ int ret;
+
+ dasd_ioctl_no_register(THIS_MODULE, BIODASDGATTR,
+ dasd_eckd_get_attrib);
+ dasd_ioctl_no_register(THIS_MODULE, BIODASDSATTR,
+ dasd_eckd_set_attrib);
+ dasd_ioctl_no_register(THIS_MODULE, BIODASDPSRD,
+ dasd_eckd_performance);
+ dasd_ioctl_no_register(THIS_MODULE, BIODASDRLSE,
+ dasd_eckd_release);
+ dasd_ioctl_no_register(THIS_MODULE, BIODASDRSRV,
+ dasd_eckd_reserve);
+ dasd_ioctl_no_register(THIS_MODULE, BIODASDSLCK,
+ dasd_eckd_steal_lock);
+
+ ASCEBC(dasd_eckd_discipline.ebcname, 4);
+
+ ret = ccw_driver_register(&dasd_eckd_driver);
+ if (ret) {
+ dasd_ioctl_no_unregister(THIS_MODULE, BIODASDGATTR,
+ dasd_eckd_get_attrib);
+ dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSATTR,
+ dasd_eckd_set_attrib);
+ dasd_ioctl_no_unregister(THIS_MODULE, BIODASDPSRD,
+ dasd_eckd_performance);
+ dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRLSE,
+ dasd_eckd_release);
+ dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRSRV,
+ dasd_eckd_reserve);
+ dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSLCK,
+ dasd_eckd_steal_lock);
+ return ret;
+ }
+
+ dasd_generic_auto_online(&dasd_eckd_driver);
+ return 0;
+}
+
+static void __exit
+dasd_eckd_cleanup(void)
+{
+ ccw_driver_unregister(&dasd_eckd_driver);
+
+ dasd_ioctl_no_unregister(THIS_MODULE, BIODASDGATTR,
+ dasd_eckd_get_attrib);
+ dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSATTR,
+ dasd_eckd_set_attrib);
+ dasd_ioctl_no_unregister(THIS_MODULE, BIODASDPSRD,
+ dasd_eckd_performance);
+ dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRLSE,
+ dasd_eckd_release);
+ dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRSRV,
+ dasd_eckd_reserve);
+ dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSLCK,
+ dasd_eckd_steal_lock);
+}
+
+module_init(dasd_eckd_init);
+module_exit(dasd_eckd_cleanup);
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only. This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-indent-level: 4
+ * c-brace-imaginary-offset: 0
+ * c-brace-offset: -4
+ * c-argdecl-indent: 4
+ * c-label-offset: -4
+ * c-continued-statement-offset: 4
+ * c-continued-brace-offset: 0
+ * indent-tabs-mode: 1
+ * tab-width: 8
+ * End:
+ */