![Christoph Lameter](/assets/img/avatar_default.png)
SLAB_DMA is an alias of GFP_DMA. This is the last one so we remove the leftover comment too. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1787 lines
50 KiB
C
1787 lines
50 KiB
C
/*
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* File...........: linux/drivers/s390/block/dasd_eckd.c
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* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
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* Horst Hummel <Horst.Hummel@de.ibm.com>
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* Carsten Otte <Cotte@de.ibm.com>
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* Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Bugreports.to..: <Linux390@de.ibm.com>
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* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
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*
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*/
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#include <linux/stddef.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/hdreg.h> /* HDIO_GETGEO */
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#include <linux/bio.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <asm/debug.h>
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#include <asm/idals.h>
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#include <asm/ebcdic.h>
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#include <asm/io.h>
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#include <asm/todclk.h>
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#include <asm/uaccess.h>
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#include <asm/cio.h>
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#include <asm/ccwdev.h>
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#include "dasd_int.h"
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#include "dasd_eckd.h"
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#ifdef PRINTK_HEADER
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#undef PRINTK_HEADER
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#endif /* PRINTK_HEADER */
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#define PRINTK_HEADER "dasd(eckd):"
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#define ECKD_C0(i) (i->home_bytes)
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#define ECKD_F(i) (i->formula)
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#define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
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(i->factors.f_0x02.f1))
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#define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
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(i->factors.f_0x02.f2))
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#define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
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(i->factors.f_0x02.f3))
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#define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
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#define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
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#define ECKD_F6(i) (i->factor6)
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#define ECKD_F7(i) (i->factor7)
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#define ECKD_F8(i) (i->factor8)
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MODULE_LICENSE("GPL");
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static struct dasd_discipline dasd_eckd_discipline;
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struct dasd_eckd_private {
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struct dasd_eckd_characteristics rdc_data;
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struct dasd_eckd_confdata conf_data;
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struct dasd_eckd_path path_data;
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struct eckd_count count_area[5];
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int init_cqr_status;
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int uses_cdl;
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struct attrib_data_t attrib; /* e.g. cache operations */
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};
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/* The ccw bus type uses this table to find devices that it sends to
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* dasd_eckd_probe */
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static struct ccw_device_id dasd_eckd_ids[] = {
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{ CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
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{ CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
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{ CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3},
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{ CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
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{ CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
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{ CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
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{ CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
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{ CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
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{ CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
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{ CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
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{ /* end of list */ },
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};
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MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
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static struct ccw_driver dasd_eckd_driver; /* see below */
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/* initial attempt at a probe function. this can be simplified once
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* the other detection code is gone */
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static int
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dasd_eckd_probe (struct ccw_device *cdev)
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{
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int ret;
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/* set ECKD specific ccw-device options */
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ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE);
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if (ret) {
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printk(KERN_WARNING
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"dasd_eckd_probe: could not set ccw-device options "
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"for %s\n", cdev->dev.bus_id);
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return ret;
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}
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ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
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return ret;
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}
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static int
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dasd_eckd_set_online(struct ccw_device *cdev)
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{
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return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
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}
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static struct ccw_driver dasd_eckd_driver = {
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.name = "dasd-eckd",
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.owner = THIS_MODULE,
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.ids = dasd_eckd_ids,
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.probe = dasd_eckd_probe,
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.remove = dasd_generic_remove,
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.set_offline = dasd_generic_set_offline,
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.set_online = dasd_eckd_set_online,
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.notify = dasd_generic_notify,
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};
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static const int sizes_trk0[] = { 28, 148, 84 };
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#define LABEL_SIZE 140
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static inline unsigned int
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round_up_multiple(unsigned int no, unsigned int mult)
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{
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int rem = no % mult;
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return (rem ? no - rem + mult : no);
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}
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static inline unsigned int
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ceil_quot(unsigned int d1, unsigned int d2)
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{
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return (d1 + (d2 - 1)) / d2;
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}
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static inline int
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bytes_per_record(struct dasd_eckd_characteristics *rdc, int kl, int dl)
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{
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unsigned int fl1, fl2, int1, int2;
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int bpr;
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switch (rdc->formula) {
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case 0x01:
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fl1 = round_up_multiple(ECKD_F2(rdc) + dl, ECKD_F1(rdc));
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fl2 = round_up_multiple(kl ? ECKD_F2(rdc) + kl : 0,
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ECKD_F1(rdc));
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bpr = fl1 + fl2;
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break;
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case 0x02:
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int1 = ceil_quot(dl + ECKD_F6(rdc), ECKD_F5(rdc) << 1);
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int2 = ceil_quot(kl + ECKD_F6(rdc), ECKD_F5(rdc) << 1);
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fl1 = round_up_multiple(ECKD_F1(rdc) * ECKD_F2(rdc) + dl +
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ECKD_F6(rdc) + ECKD_F4(rdc) * int1,
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ECKD_F1(rdc));
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fl2 = round_up_multiple(ECKD_F1(rdc) * ECKD_F3(rdc) + kl +
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ECKD_F6(rdc) + ECKD_F4(rdc) * int2,
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ECKD_F1(rdc));
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bpr = fl1 + fl2;
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break;
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default:
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bpr = 0;
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break;
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}
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return bpr;
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}
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static inline unsigned int
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bytes_per_track(struct dasd_eckd_characteristics *rdc)
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{
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return *(unsigned int *) (rdc->byte_per_track) >> 8;
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}
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static inline unsigned int
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recs_per_track(struct dasd_eckd_characteristics * rdc,
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unsigned int kl, unsigned int dl)
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{
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int dn, kn;
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switch (rdc->dev_type) {
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case 0x3380:
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if (kl)
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return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
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ceil_quot(dl + 12, 32));
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else
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return 1499 / (15 + ceil_quot(dl + 12, 32));
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case 0x3390:
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dn = ceil_quot(dl + 6, 232) + 1;
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if (kl) {
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kn = ceil_quot(kl + 6, 232) + 1;
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return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
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9 + ceil_quot(dl + 6 * dn, 34));
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} else
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return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
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case 0x9345:
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dn = ceil_quot(dl + 6, 232) + 1;
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if (kl) {
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kn = ceil_quot(kl + 6, 232) + 1;
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return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
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ceil_quot(dl + 6 * dn, 34));
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} else
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return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
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}
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return 0;
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}
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static inline void
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check_XRC (struct ccw1 *de_ccw,
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struct DE_eckd_data *data,
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struct dasd_device *device)
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{
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struct dasd_eckd_private *private;
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private = (struct dasd_eckd_private *) device->private;
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/* switch on System Time Stamp - needed for XRC Support */
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if (private->rdc_data.facilities.XRC_supported) {
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data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
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data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
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data->ep_sys_time = get_clock ();
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de_ccw->count = sizeof (struct DE_eckd_data);
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de_ccw->flags |= CCW_FLAG_SLI;
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}
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return;
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} /* end check_XRC */
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static inline void
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define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk,
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int totrk, int cmd, struct dasd_device * device)
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{
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struct dasd_eckd_private *private;
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struct ch_t geo, beg, end;
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private = (struct dasd_eckd_private *) device->private;
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ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
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ccw->flags = 0;
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ccw->count = 16;
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ccw->cda = (__u32) __pa(data);
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memset(data, 0, sizeof (struct DE_eckd_data));
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switch (cmd) {
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case DASD_ECKD_CCW_READ_HOME_ADDRESS:
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case DASD_ECKD_CCW_READ_RECORD_ZERO:
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case DASD_ECKD_CCW_READ:
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case DASD_ECKD_CCW_READ_MT:
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case DASD_ECKD_CCW_READ_CKD:
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case DASD_ECKD_CCW_READ_CKD_MT:
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case DASD_ECKD_CCW_READ_KD:
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case DASD_ECKD_CCW_READ_KD_MT:
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case DASD_ECKD_CCW_READ_COUNT:
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data->mask.perm = 0x1;
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data->attributes.operation = private->attrib.operation;
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break;
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case DASD_ECKD_CCW_WRITE:
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case DASD_ECKD_CCW_WRITE_MT:
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case DASD_ECKD_CCW_WRITE_KD:
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case DASD_ECKD_CCW_WRITE_KD_MT:
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data->mask.perm = 0x02;
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data->attributes.operation = private->attrib.operation;
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check_XRC (ccw, data, device);
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break;
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case DASD_ECKD_CCW_WRITE_CKD:
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case DASD_ECKD_CCW_WRITE_CKD_MT:
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data->attributes.operation = DASD_BYPASS_CACHE;
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check_XRC (ccw, data, device);
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break;
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case DASD_ECKD_CCW_ERASE:
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case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
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case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
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data->mask.perm = 0x3;
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data->mask.auth = 0x1;
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data->attributes.operation = DASD_BYPASS_CACHE;
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check_XRC (ccw, data, device);
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break;
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default:
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DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd);
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break;
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}
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data->attributes.mode = 0x3; /* ECKD */
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if ((private->rdc_data.cu_type == 0x2105 ||
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private->rdc_data.cu_type == 0x2107 ||
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private->rdc_data.cu_type == 0x1750)
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&& !(private->uses_cdl && trk < 2))
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data->ga_extended |= 0x40; /* Regular Data Format Mode */
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geo.cyl = private->rdc_data.no_cyl;
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geo.head = private->rdc_data.trk_per_cyl;
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beg.cyl = trk / geo.head;
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beg.head = trk % geo.head;
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end.cyl = totrk / geo.head;
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end.head = totrk % geo.head;
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/* check for sequential prestage - enhance cylinder range */
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if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
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data->attributes.operation == DASD_SEQ_ACCESS) {
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if (end.cyl + private->attrib.nr_cyl < geo.cyl)
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end.cyl += private->attrib.nr_cyl;
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else
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end.cyl = (geo.cyl - 1);
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}
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data->beg_ext.cyl = beg.cyl;
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data->beg_ext.head = beg.head;
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data->end_ext.cyl = end.cyl;
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data->end_ext.head = end.head;
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}
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static inline void
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locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk,
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int rec_on_trk, int no_rec, int cmd,
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struct dasd_device * device, int reclen)
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{
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struct dasd_eckd_private *private;
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int sector;
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int dn, d;
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private = (struct dasd_eckd_private *) device->private;
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DBF_DEV_EVENT(DBF_INFO, device,
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"Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
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trk, rec_on_trk, no_rec, cmd, reclen);
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ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
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ccw->flags = 0;
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ccw->count = 16;
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ccw->cda = (__u32) __pa(data);
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memset(data, 0, sizeof (struct LO_eckd_data));
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sector = 0;
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if (rec_on_trk) {
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switch (private->rdc_data.dev_type) {
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case 0x3390:
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dn = ceil_quot(reclen + 6, 232);
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d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
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sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
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break;
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case 0x3380:
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d = 7 + ceil_quot(reclen + 12, 32);
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sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
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break;
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}
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}
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data->sector = sector;
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data->count = no_rec;
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switch (cmd) {
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case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
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data->operation.orientation = 0x3;
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data->operation.operation = 0x03;
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break;
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case DASD_ECKD_CCW_READ_HOME_ADDRESS:
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data->operation.orientation = 0x3;
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data->operation.operation = 0x16;
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break;
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case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
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data->operation.orientation = 0x1;
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data->operation.operation = 0x03;
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data->count++;
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break;
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case DASD_ECKD_CCW_READ_RECORD_ZERO:
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data->operation.orientation = 0x3;
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data->operation.operation = 0x16;
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data->count++;
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break;
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case DASD_ECKD_CCW_WRITE:
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case DASD_ECKD_CCW_WRITE_MT:
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case DASD_ECKD_CCW_WRITE_KD:
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case DASD_ECKD_CCW_WRITE_KD_MT:
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data->auxiliary.last_bytes_used = 0x1;
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data->length = reclen;
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data->operation.operation = 0x01;
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break;
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case DASD_ECKD_CCW_WRITE_CKD:
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case DASD_ECKD_CCW_WRITE_CKD_MT:
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data->auxiliary.last_bytes_used = 0x1;
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data->length = reclen;
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data->operation.operation = 0x03;
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break;
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case DASD_ECKD_CCW_READ:
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case DASD_ECKD_CCW_READ_MT:
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case DASD_ECKD_CCW_READ_KD:
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case DASD_ECKD_CCW_READ_KD_MT:
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data->auxiliary.last_bytes_used = 0x1;
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data->length = reclen;
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data->operation.operation = 0x06;
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break;
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case DASD_ECKD_CCW_READ_CKD:
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case DASD_ECKD_CCW_READ_CKD_MT:
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data->auxiliary.last_bytes_used = 0x1;
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data->length = reclen;
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data->operation.operation = 0x16;
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break;
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case DASD_ECKD_CCW_READ_COUNT:
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data->operation.operation = 0x06;
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break;
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case DASD_ECKD_CCW_ERASE:
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data->length = reclen;
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data->auxiliary.last_bytes_used = 0x1;
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data->operation.operation = 0x0b;
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break;
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default:
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DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd);
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}
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data->seek_addr.cyl = data->search_arg.cyl =
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trk / private->rdc_data.trk_per_cyl;
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data->seek_addr.head = data->search_arg.head =
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trk % private->rdc_data.trk_per_cyl;
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data->search_arg.record = rec_on_trk;
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}
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/*
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* Returns 1 if the block is one of the special blocks that needs
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* to get read/written with the KD variant of the command.
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* That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
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* DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
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* Luckily the KD variants differ only by one bit (0x08) from the
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* normal variant. So don't wonder about code like:
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* if (dasd_eckd_cdl_special(blk_per_trk, recid))
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* ccw->cmd_code |= 0x8;
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*/
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static inline int
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|
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;
|
|
}
|
|
|
|
/*
|
|
* Generate device unique id that specifies the physical device.
|
|
*/
|
|
static int
|
|
dasd_eckd_generate_uid(struct dasd_device *device, struct dasd_uid *uid)
|
|
{
|
|
struct dasd_eckd_private *private;
|
|
struct dasd_eckd_confdata *confdata;
|
|
|
|
private = (struct dasd_eckd_private *) device->private;
|
|
if (!private)
|
|
return -ENODEV;
|
|
confdata = &private->conf_data;
|
|
if (!confdata)
|
|
return -ENODEV;
|
|
|
|
memset(uid, 0, sizeof(struct dasd_uid));
|
|
memcpy(uid->vendor, confdata->ned1.HDA_manufacturer,
|
|
sizeof(uid->vendor) - 1);
|
|
EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
|
|
memcpy(uid->serial, confdata->ned1.HDA_location,
|
|
sizeof(uid->serial) - 1);
|
|
EBCASC(uid->serial, sizeof(uid->serial) - 1);
|
|
uid->ssid = confdata->neq.subsystemID;
|
|
if (confdata->ned2.sneq.flags == 0x40) {
|
|
uid->alias = 1;
|
|
uid->unit_addr = confdata->ned2.sneq.base_unit_addr;
|
|
} else
|
|
uid->unit_addr = confdata->ned1.unit_addr;
|
|
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Build CP for Perform Subsystem Function - SSC.
|
|
*/
|
|
struct dasd_ccw_req *
|
|
dasd_eckd_build_psf_ssc(struct dasd_device *device)
|
|
{
|
|
struct dasd_ccw_req *cqr;
|
|
struct dasd_psf_ssc_data *psf_ssc_data;
|
|
struct ccw1 *ccw;
|
|
|
|
cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ ,
|
|
sizeof(struct dasd_psf_ssc_data),
|
|
device);
|
|
|
|
if (IS_ERR(cqr)) {
|
|
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
|
"Could not allocate PSF-SSC request");
|
|
return cqr;
|
|
}
|
|
psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
|
|
psf_ssc_data->order = PSF_ORDER_SSC;
|
|
psf_ssc_data->suborder = 0x08;
|
|
|
|
ccw = cqr->cpaddr;
|
|
ccw->cmd_code = DASD_ECKD_CCW_PSF;
|
|
ccw->cda = (__u32)(addr_t)psf_ssc_data;
|
|
ccw->count = 66;
|
|
|
|
cqr->device = device;
|
|
cqr->expires = 10*HZ;
|
|
cqr->buildclk = get_clock();
|
|
cqr->status = DASD_CQR_FILLED;
|
|
return cqr;
|
|
}
|
|
|
|
/*
|
|
* Perform Subsystem Function.
|
|
* It is necessary to trigger CIO for channel revalidation since this
|
|
* call might change behaviour of DASD devices.
|
|
*/
|
|
static int
|
|
dasd_eckd_psf_ssc(struct dasd_device *device)
|
|
{
|
|
struct dasd_ccw_req *cqr;
|
|
int rc;
|
|
|
|
cqr = dasd_eckd_build_psf_ssc(device);
|
|
if (IS_ERR(cqr))
|
|
return PTR_ERR(cqr);
|
|
|
|
rc = dasd_sleep_on(cqr);
|
|
if (!rc)
|
|
/* trigger CIO to reprobe devices */
|
|
css_schedule_reprobe();
|
|
dasd_sfree_request(cqr, cqr->device);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Valide storage server of current device.
|
|
*/
|
|
static int
|
|
dasd_eckd_validate_server(struct dasd_device *device, struct dasd_uid *uid)
|
|
{
|
|
int rc;
|
|
|
|
/* Currently PAV is the only reason to 'validate' server on LPAR */
|
|
if (dasd_nopav || MACHINE_IS_VM)
|
|
return 0;
|
|
|
|
rc = dasd_eckd_psf_ssc(device);
|
|
/* may be requested feature is not available on server,
|
|
* therefore just report error and go ahead */
|
|
DEV_MESSAGE(KERN_INFO, device,
|
|
"PSF-SSC on storage subsystem %s.%s.%04x returned rc=%d",
|
|
uid->vendor, uid->serial, uid->ssid, rc);
|
|
/* RE-Read Configuration Data */
|
|
return dasd_eckd_read_conf(device);
|
|
}
|
|
|
|
/*
|
|
* Check device characteristics.
|
|
* If the device is accessible using ECKD discipline, the device is enabled.
|
|
*/
|
|
static int
|
|
dasd_eckd_check_characteristics(struct dasd_device *device)
|
|
{
|
|
struct dasd_eckd_private *private;
|
|
struct dasd_uid uid;
|
|
void *rdc_data;
|
|
int rc;
|
|
|
|
private = (struct dasd_eckd_private *) device->private;
|
|
if (private == NULL) {
|
|
private = kzalloc(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;
|
|
}
|
|
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 Configuration Data */
|
|
rc = dasd_eckd_read_conf(device);
|
|
if (rc)
|
|
return rc;
|
|
|
|
/* Generate device unique id and register in devmap */
|
|
rc = dasd_eckd_generate_uid(device, &uid);
|
|
if (rc)
|
|
return rc;
|
|
rc = dasd_set_uid(device->cdev, &uid);
|
|
if (rc == 1) /* new server found */
|
|
rc = dasd_eckd_validate_server(device, &uid);
|
|
if (rc)
|
|
return rc;
|
|
|
|
/* 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);
|
|
if (rc)
|
|
DEV_MESSAGE(KERN_WARNING, device,
|
|
"Read device characteristics returned "
|
|
"rc=%d", 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);
|
|
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_64BIT)
|
|
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,
|
|
GFP_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 &&
|
|
rq_data_dir(req) == READ)
|
|
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++;
|
|
}
|
|
}
|
|
if (req->cmd_flags & REQ_FAILFAST)
|
|
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
|
|
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 dasd_device *device)
|
|
{
|
|
struct dasd_ccw_req *cqr;
|
|
int rc;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
|
|
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);
|
|
set_bit(DASD_CQR_FLAGS_FAILFAST, &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 dasd_device *device)
|
|
{
|
|
struct dasd_ccw_req *cqr;
|
|
int rc;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
|
|
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);
|
|
set_bit(DASD_CQR_FLAGS_FAILFAST, &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 dasd_device *device)
|
|
{
|
|
struct dasd_ccw_req *cqr;
|
|
int rc;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
|
|
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);
|
|
set_bit(DASD_CQR_FLAGS_FAILFAST, &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 dasd_device *device, void __user *argp)
|
|
{
|
|
struct dasd_psf_prssd_data *prssdp;
|
|
struct dasd_rssd_perf_stats_t *stats;
|
|
struct dasd_ccw_req *cqr;
|
|
struct ccw1 *ccw;
|
|
int rc;
|
|
|
|
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);
|
|
if (copy_to_user(argp, stats,
|
|
sizeof(struct dasd_rssd_perf_stats_t)))
|
|
rc = -EFAULT;
|
|
}
|
|
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 dasd_device *device, void __user *argp)
|
|
{
|
|
struct dasd_eckd_private *private =
|
|
(struct dasd_eckd_private *)device->private;
|
|
struct attrib_data_t attrib = private->attrib;
|
|
int rc;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
if (!argp)
|
|
return -EINVAL;
|
|
|
|
rc = 0;
|
|
if (copy_to_user(argp, (long *) &attrib,
|
|
sizeof (struct attrib_data_t)))
|
|
rc = -EFAULT;
|
|
|
|
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 dasd_device *device, void __user *argp)
|
|
{
|
|
struct dasd_eckd_private *private =
|
|
(struct dasd_eckd_private *)device->private;
|
|
struct attrib_data_t attrib;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
if (!argp)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
|
|
return -EFAULT;
|
|
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;
|
|
}
|
|
|
|
static int
|
|
dasd_eckd_ioctl(struct dasd_device *device, unsigned int cmd, void __user *argp)
|
|
{
|
|
switch (cmd) {
|
|
case BIODASDGATTR:
|
|
return dasd_eckd_get_attrib(device, argp);
|
|
case BIODASDSATTR:
|
|
return dasd_eckd_set_attrib(device, argp);
|
|
case BIODASDPSRD:
|
|
return dasd_eckd_performance(device, argp);
|
|
case BIODASDRLSE:
|
|
return dasd_eckd_release(device);
|
|
case BIODASDRSRV:
|
|
return dasd_eckd_reserve(device);
|
|
case BIODASDSLCK:
|
|
return dasd_eckd_steal_lock(device);
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dump the range of CCWs into 'page' buffer
|
|
* and return number of printed chars.
|
|
*/
|
|
static inline int
|
|
dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
|
|
{
|
|
int len, count;
|
|
char *datap;
|
|
|
|
len = 0;
|
|
while (from <= to) {
|
|
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
|
|
" CCW %p: %08X %08X DAT:",
|
|
from, ((int *) from)[0], ((int *) from)[1]);
|
|
|
|
/* get pointer to data (consider IDALs) */
|
|
if (from->flags & CCW_FLAG_IDA)
|
|
datap = (char *) *((addr_t *) (addr_t) from->cda);
|
|
else
|
|
datap = (char *) ((addr_t) from->cda);
|
|
|
|
/* dump data (max 32 bytes) */
|
|
for (count = 0; count < from->count && count < 32; count++) {
|
|
if (count % 8 == 0) len += sprintf(page + len, " ");
|
|
if (count % 4 == 0) len += sprintf(page + len, " ");
|
|
len += sprintf(page + len, "%02x", datap[count]);
|
|
}
|
|
len += sprintf(page + len, "\n");
|
|
from++;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* 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 *first, *last, *fail, *from, *to;
|
|
int len, sl, sct;
|
|
|
|
page = (char *) get_zeroed_page(GFP_ATOMIC);
|
|
if (page == NULL) {
|
|
DEV_MESSAGE(KERN_ERR, device, " %s",
|
|
"No memory to dump sense data");
|
|
return;
|
|
}
|
|
/* dump the sense data */
|
|
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 */
|
|
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 */
|
|
sprintf(page + len, KERN_ERR PRINTK_HEADER
|
|
" 32 Byte: Format: %x "
|
|
"Exception class %x\n",
|
|
irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
|
|
}
|
|
} else {
|
|
sprintf(page + len, KERN_ERR PRINTK_HEADER
|
|
" SORRY - NO VALID SENSE AVAILABLE\n");
|
|
}
|
|
printk("%s", page);
|
|
|
|
/* dump the Channel Program (max 140 Bytes per line) */
|
|
/* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
|
|
first = req->cpaddr;
|
|
for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
|
|
to = min(first + 6, last);
|
|
len = sprintf(page, KERN_ERR PRINTK_HEADER
|
|
" Related CP in req: %p\n", req);
|
|
dasd_eckd_dump_ccw_range(first, to, page + len);
|
|
printk("%s", page);
|
|
|
|
/* print failing CCW area (maximum 4) */
|
|
/* scsw->cda is either valid or zero */
|
|
len = 0;
|
|
from = ++to;
|
|
fail = (struct ccw1 *)(addr_t) irb->scsw.cpa; /* failing CCW */
|
|
if (from < fail - 2) {
|
|
from = fail - 2; /* there is a gap - print header */
|
|
len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
|
|
}
|
|
to = min(fail + 1, last);
|
|
len += dasd_eckd_dump_ccw_range(from, to, page + len);
|
|
|
|
/* print last CCWs (maximum 2) */
|
|
from = max(from, ++to);
|
|
if (from < last - 1) {
|
|
from = last - 1; /* there is a gap - print header */
|
|
len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
|
|
}
|
|
len += dasd_eckd_dump_ccw_range(from, last, page + len);
|
|
if (len > 0)
|
|
printk("%s", page);
|
|
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,
|
|
.ioctl = dasd_eckd_ioctl,
|
|
};
|
|
|
|
static int __init
|
|
dasd_eckd_init(void)
|
|
{
|
|
ASCEBC(dasd_eckd_discipline.ebcname, 4);
|
|
return ccw_driver_register(&dasd_eckd_driver);
|
|
}
|
|
|
|
static void __exit
|
|
dasd_eckd_cleanup(void)
|
|
{
|
|
ccw_driver_unregister(&dasd_eckd_driver);
|
|
}
|
|
|
|
module_init(dasd_eckd_init);
|
|
module_exit(dasd_eckd_cleanup);
|