16a55d2cdSGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0
21da177e4SLinus Torvalds /*
31da177e4SLinus Torvalds * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
41da177e4SLinus Torvalds * Bugreports.to..: <Linux390@de.ibm.com>
5d41dd122SStefan Haberland * Copyright IBM Corp. 1999, 2009
61da177e4SLinus Torvalds */
71da177e4SLinus Torvalds
8ca99dab0SStefan Haberland #define KMSG_COMPONENT "dasd-fba"
9fc19f381SStefan Haberland
101da177e4SLinus Torvalds #include <linux/stddef.h>
111da177e4SLinus Torvalds #include <linux/kernel.h>
121da177e4SLinus Torvalds #include <asm/debug.h>
131da177e4SLinus Torvalds
141da177e4SLinus Torvalds #include <linux/slab.h>
151da177e4SLinus Torvalds #include <linux/hdreg.h> /* HDIO_GETGEO */
161da177e4SLinus Torvalds #include <linux/bio.h>
171da177e4SLinus Torvalds #include <linux/module.h>
181da177e4SLinus Torvalds #include <linux/init.h>
19*b378a982SHeiko Carstens #include <linux/io.h>
201da177e4SLinus Torvalds
211da177e4SLinus Torvalds #include <asm/idals.h>
221da177e4SLinus Torvalds #include <asm/ebcdic.h>
231da177e4SLinus Torvalds #include <asm/ccwdev.h>
241da177e4SLinus Torvalds
251da177e4SLinus Torvalds #include "dasd_int.h"
261da177e4SLinus Torvalds #include "dasd_fba.h"
271da177e4SLinus Torvalds
281da177e4SLinus Torvalds #ifdef PRINTK_HEADER
291da177e4SLinus Torvalds #undef PRINTK_HEADER
301da177e4SLinus Torvalds #endif /* PRINTK_HEADER */
311da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(fba):"
321da177e4SLinus Torvalds
331f1ee9adSHannes Reinecke #define FBA_DEFAULT_RETRIES 32
341f1ee9adSHannes Reinecke
351da177e4SLinus Torvalds #define DASD_FBA_CCW_WRITE 0x41
361da177e4SLinus Torvalds #define DASD_FBA_CCW_READ 0x42
371da177e4SLinus Torvalds #define DASD_FBA_CCW_LOCATE 0x43
381da177e4SLinus Torvalds #define DASD_FBA_CCW_DEFINE_EXTENT 0x63
391da177e4SLinus Torvalds
401da177e4SLinus Torvalds MODULE_LICENSE("GPL");
411da177e4SLinus Torvalds
421da177e4SLinus Torvalds static struct dasd_discipline dasd_fba_discipline;
43709192d5SJan Höppner static void *dasd_fba_zero_page;
441da177e4SLinus Torvalds
451da177e4SLinus Torvalds struct dasd_fba_private {
461da177e4SLinus Torvalds struct dasd_fba_characteristics rdc_data;
471da177e4SLinus Torvalds };
481da177e4SLinus Torvalds
491da177e4SLinus Torvalds static struct ccw_device_id dasd_fba_ids[] = {
50d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x6310, 0, 0x9336, 0), .driver_info = 0x1},
51d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3370, 0), .driver_info = 0x2},
521da177e4SLinus Torvalds { /* end of list */ },
531da177e4SLinus Torvalds };
541da177e4SLinus Torvalds
551da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_fba_ids);
561da177e4SLinus Torvalds
571da177e4SLinus Torvalds static int
dasd_fba_set_online(struct ccw_device * cdev)581da177e4SLinus Torvalds dasd_fba_set_online(struct ccw_device *cdev)
591da177e4SLinus Torvalds {
601da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_fba_discipline);
611da177e4SLinus Torvalds }
621da177e4SLinus Torvalds
631da177e4SLinus Torvalds static struct ccw_driver dasd_fba_driver = {
643bda058bSSebastian Ott .driver = {
651da177e4SLinus Torvalds .name = "dasd-fba",
661da177e4SLinus Torvalds .owner = THIS_MODULE,
671987c551SJulian Wiedmann .dev_groups = dasd_dev_groups,
683bda058bSSebastian Ott },
691da177e4SLinus Torvalds .ids = dasd_fba_ids,
7086f0a011SJulian Wiedmann .probe = dasd_generic_probe,
711da177e4SLinus Torvalds .remove = dasd_generic_remove,
721da177e4SLinus Torvalds .set_offline = dasd_generic_set_offline,
731da177e4SLinus Torvalds .set_online = dasd_fba_set_online,
741da177e4SLinus Torvalds .notify = dasd_generic_notify,
75a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event,
76420f42ecSHeiko Carstens .int_class = IRQIO_DAS,
771da177e4SLinus Torvalds };
781da177e4SLinus Torvalds
794d284cacSHeiko Carstens static void
define_extent(struct ccw1 * ccw,struct DE_fba_data * data,int rw,int blksize,int beg,int nr)801da177e4SLinus Torvalds define_extent(struct ccw1 * ccw, struct DE_fba_data *data, int rw,
811da177e4SLinus Torvalds int blksize, int beg, int nr)
821da177e4SLinus Torvalds {
831da177e4SLinus Torvalds ccw->cmd_code = DASD_FBA_CCW_DEFINE_EXTENT;
841da177e4SLinus Torvalds ccw->flags = 0;
851da177e4SLinus Torvalds ccw->count = 16;
86b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(data);
871da177e4SLinus Torvalds memset(data, 0, sizeof (struct DE_fba_data));
881da177e4SLinus Torvalds if (rw == WRITE)
891da177e4SLinus Torvalds (data->mask).perm = 0x0;
901da177e4SLinus Torvalds else if (rw == READ)
911da177e4SLinus Torvalds (data->mask).perm = 0x1;
921da177e4SLinus Torvalds else
931da177e4SLinus Torvalds data->mask.perm = 0x2;
941da177e4SLinus Torvalds data->blk_size = blksize;
951da177e4SLinus Torvalds data->ext_loc = beg;
961da177e4SLinus Torvalds data->ext_end = nr - 1;
971da177e4SLinus Torvalds }
981da177e4SLinus Torvalds
994d284cacSHeiko Carstens static void
locate_record(struct ccw1 * ccw,struct LO_fba_data * data,int rw,int block_nr,int block_ct)1001da177e4SLinus Torvalds locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw,
1011da177e4SLinus Torvalds int block_nr, int block_ct)
1021da177e4SLinus Torvalds {
1031da177e4SLinus Torvalds ccw->cmd_code = DASD_FBA_CCW_LOCATE;
1041da177e4SLinus Torvalds ccw->flags = 0;
1051da177e4SLinus Torvalds ccw->count = 8;
106b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(data);
1071da177e4SLinus Torvalds memset(data, 0, sizeof (struct LO_fba_data));
1081da177e4SLinus Torvalds if (rw == WRITE)
1091da177e4SLinus Torvalds data->operation.cmd = 0x5;
1101da177e4SLinus Torvalds else if (rw == READ)
1111da177e4SLinus Torvalds data->operation.cmd = 0x6;
1121da177e4SLinus Torvalds else
1131da177e4SLinus Torvalds data->operation.cmd = 0x8;
1141da177e4SLinus Torvalds data->blk_nr = block_nr;
1151da177e4SLinus Torvalds data->blk_ct = block_ct;
1161da177e4SLinus Torvalds }
1171da177e4SLinus Torvalds
1181da177e4SLinus Torvalds static int
dasd_fba_check_characteristics(struct dasd_device * device)1191da177e4SLinus Torvalds dasd_fba_check_characteristics(struct dasd_device *device)
1201da177e4SLinus Torvalds {
121543691a4SSebastian Ott struct dasd_fba_private *private = device->private;
1221da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev;
123543691a4SSebastian Ott struct dasd_block *block;
124543691a4SSebastian Ott int readonly, rc;
1251da177e4SLinus Torvalds
12692636b15SSebastian Ott if (!private) {
12792636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
12892636b15SSebastian Ott if (!private) {
129fc19f381SStefan Haberland dev_warn(&device->cdev->dev,
130fc19f381SStefan Haberland "Allocating memory for private DASD "
131fc19f381SStefan Haberland "data failed\n");
1321da177e4SLinus Torvalds return -ENOMEM;
1331da177e4SLinus Torvalds }
134543691a4SSebastian Ott device->private = private;
13592636b15SSebastian Ott } else {
13692636b15SSebastian Ott memset(private, 0, sizeof(*private));
1371da177e4SLinus Torvalds }
1388e09f215SStefan Weinhuber block = dasd_alloc_block();
1398e09f215SStefan Weinhuber if (IS_ERR(block)) {
140b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", "could not allocate "
141b8ed5dd5SStefan Haberland "dasd block structure");
1427337194fSCornelia Huck device->private = NULL;
1437337194fSCornelia Huck kfree(private);
1448e09f215SStefan Weinhuber return PTR_ERR(block);
1458e09f215SStefan Weinhuber }
1468e09f215SStefan Weinhuber device->block = block;
1478e09f215SStefan Weinhuber block->base = device;
1488e09f215SStefan Weinhuber
1491da177e4SLinus Torvalds /* Read Device Characteristics */
15068b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_FBA_MAGIC,
15168b781feSStefan Haberland &private->rdc_data, 32);
1521da177e4SLinus Torvalds if (rc) {
153b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "Read device "
154b8ed5dd5SStefan Haberland "characteristics returned error %d", rc);
1557337194fSCornelia Huck device->block = NULL;
1567337194fSCornelia Huck dasd_free_block(block);
1577337194fSCornelia Huck device->private = NULL;
1587337194fSCornelia Huck kfree(private);
1591da177e4SLinus Torvalds return rc;
1601da177e4SLinus Torvalds }
1611da177e4SLinus Torvalds
1627c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES;
1631f1ee9adSHannes Reinecke device->default_retries = FBA_DEFAULT_RETRIES;
164c9346151SStefan Haberland dasd_path_set_opm(device, LPM_ANYPATH);
1657c8faa86SStefan Haberland
16633b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device);
16733b62a30SStefan Weinhuber if (readonly)
16833b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
16933b62a30SStefan Weinhuber
17028b841b3SJan Höppner /* FBA supports discard, set the according feature bit */
17128b841b3SJan Höppner dasd_set_feature(cdev, DASD_FEATURE_DISCARD, 1);
17228b841b3SJan Höppner
173fc19f381SStefan Haberland dev_info(&device->cdev->dev,
174fc19f381SStefan Haberland "New FBA DASD %04X/%02X (CU %04X/%02X) with %d MB "
17533b62a30SStefan Weinhuber "and %d B/blk%s\n",
1761da177e4SLinus Torvalds cdev->id.dev_type,
1771da177e4SLinus Torvalds cdev->id.dev_model,
1781da177e4SLinus Torvalds cdev->id.cu_type,
1791da177e4SLinus Torvalds cdev->id.cu_model,
1801da177e4SLinus Torvalds ((private->rdc_data.blk_bdsa *
1811da177e4SLinus Torvalds (private->rdc_data.blk_size >> 9)) >> 11),
18233b62a30SStefan Weinhuber private->rdc_data.blk_size,
18333b62a30SStefan Weinhuber readonly ? ", read-only device" : "");
1841da177e4SLinus Torvalds return 0;
1851da177e4SLinus Torvalds }
1861da177e4SLinus Torvalds
dasd_fba_do_analysis(struct dasd_block * block)1878e09f215SStefan Weinhuber static int dasd_fba_do_analysis(struct dasd_block *block)
1881da177e4SLinus Torvalds {
189543691a4SSebastian Ott struct dasd_fba_private *private = block->base->private;
1901da177e4SLinus Torvalds int sb, rc;
1911da177e4SLinus Torvalds
1921da177e4SLinus Torvalds rc = dasd_check_blocksize(private->rdc_data.blk_size);
1931da177e4SLinus Torvalds if (rc) {
194fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, block->base, "unknown blocksize %d",
1951da177e4SLinus Torvalds private->rdc_data.blk_size);
1961da177e4SLinus Torvalds return rc;
1971da177e4SLinus Torvalds }
1988e09f215SStefan Weinhuber block->blocks = private->rdc_data.blk_bdsa;
1998e09f215SStefan Weinhuber block->bp_block = private->rdc_data.blk_size;
2008e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */
2011da177e4SLinus Torvalds for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1)
2028e09f215SStefan Weinhuber block->s2b_shift++;
2031da177e4SLinus Torvalds return 0;
2041da177e4SLinus Torvalds }
2051da177e4SLinus Torvalds
dasd_fba_fill_geometry(struct dasd_block * block,struct hd_geometry * geo)2068e09f215SStefan Weinhuber static int dasd_fba_fill_geometry(struct dasd_block *block,
2078e09f215SStefan Weinhuber struct hd_geometry *geo)
2081da177e4SLinus Torvalds {
2098e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) != 0)
2101da177e4SLinus Torvalds return -EINVAL;
2118e09f215SStefan Weinhuber geo->cylinders = (block->blocks << block->s2b_shift) >> 10;
2121da177e4SLinus Torvalds geo->heads = 16;
2138e09f215SStefan Weinhuber geo->sectors = 128 >> block->s2b_shift;
2141da177e4SLinus Torvalds return 0;
2151da177e4SLinus Torvalds }
2161da177e4SLinus Torvalds
2171da177e4SLinus Torvalds static dasd_erp_fn_t
dasd_fba_erp_action(struct dasd_ccw_req * cqr)2181da177e4SLinus Torvalds dasd_fba_erp_action(struct dasd_ccw_req * cqr)
2191da177e4SLinus Torvalds {
2201da177e4SLinus Torvalds return dasd_default_erp_action;
2211da177e4SLinus Torvalds }
2221da177e4SLinus Torvalds
2231da177e4SLinus Torvalds static dasd_erp_fn_t
dasd_fba_erp_postaction(struct dasd_ccw_req * cqr)2241da177e4SLinus Torvalds dasd_fba_erp_postaction(struct dasd_ccw_req * cqr)
2251da177e4SLinus Torvalds {
2261da177e4SLinus Torvalds if (cqr->function == dasd_default_erp_action)
2271da177e4SLinus Torvalds return dasd_default_erp_postaction;
2281da177e4SLinus Torvalds
229fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, cqr->startdev, "unknown ERP action %p",
2301da177e4SLinus Torvalds cqr->function);
2311da177e4SLinus Torvalds return NULL;
2321da177e4SLinus Torvalds }
2331da177e4SLinus Torvalds
dasd_fba_check_for_device_change(struct dasd_device * device,struct dasd_ccw_req * cqr,struct irb * irb)2345a27e60dSStefan Weinhuber static void dasd_fba_check_for_device_change(struct dasd_device *device,
2355a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr,
2368e09f215SStefan Weinhuber struct irb *irb)
2378e09f215SStefan Weinhuber {
2388e09f215SStefan Weinhuber char mask;
2398e09f215SStefan Weinhuber
2408e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */
2418e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
2425a27e60dSStefan Weinhuber if ((irb->scsw.cmd.dstat & mask) == mask)
2438e09f215SStefan Weinhuber dasd_generic_handle_state_change(device);
2448e09f215SStefan Weinhuber };
2458e09f215SStefan Weinhuber
24628b841b3SJan Höppner
24728b841b3SJan Höppner /*
24828b841b3SJan Höppner * Builds a CCW with no data payload
24928b841b3SJan Höppner */
ccw_write_no_data(struct ccw1 * ccw)25028b841b3SJan Höppner static void ccw_write_no_data(struct ccw1 *ccw)
25128b841b3SJan Höppner {
25228b841b3SJan Höppner ccw->cmd_code = DASD_FBA_CCW_WRITE;
25328b841b3SJan Höppner ccw->flags |= CCW_FLAG_SLI;
25428b841b3SJan Höppner ccw->count = 0;
25528b841b3SJan Höppner }
25628b841b3SJan Höppner
25728b841b3SJan Höppner /*
25828b841b3SJan Höppner * Builds a CCW that writes only zeroes.
25928b841b3SJan Höppner */
ccw_write_zero(struct ccw1 * ccw,int count)26028b841b3SJan Höppner static void ccw_write_zero(struct ccw1 *ccw, int count)
26128b841b3SJan Höppner {
26228b841b3SJan Höppner ccw->cmd_code = DASD_FBA_CCW_WRITE;
26328b841b3SJan Höppner ccw->flags |= CCW_FLAG_SLI;
26428b841b3SJan Höppner ccw->count = count;
265b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(dasd_fba_zero_page);
26628b841b3SJan Höppner }
26728b841b3SJan Höppner
26828b841b3SJan Höppner /*
26928b841b3SJan Höppner * Helper function to count the amount of necessary CCWs within a given range
27028b841b3SJan Höppner * with 4k alignment and command chaining in mind.
27128b841b3SJan Höppner */
count_ccws(sector_t first_rec,sector_t last_rec,unsigned int blocks_per_page)27228b841b3SJan Höppner static int count_ccws(sector_t first_rec, sector_t last_rec,
27328b841b3SJan Höppner unsigned int blocks_per_page)
27428b841b3SJan Höppner {
27528b841b3SJan Höppner sector_t wz_stop = 0, d_stop = 0;
27628b841b3SJan Höppner int cur_pos = 0;
27728b841b3SJan Höppner int count = 0;
27828b841b3SJan Höppner
27928b841b3SJan Höppner if (first_rec % blocks_per_page != 0) {
28028b841b3SJan Höppner wz_stop = first_rec + blocks_per_page -
28128b841b3SJan Höppner (first_rec % blocks_per_page) - 1;
28228b841b3SJan Höppner if (wz_stop > last_rec)
28328b841b3SJan Höppner wz_stop = last_rec;
28428b841b3SJan Höppner cur_pos = wz_stop - first_rec + 1;
28528b841b3SJan Höppner count++;
28628b841b3SJan Höppner }
28728b841b3SJan Höppner
28828b841b3SJan Höppner if (last_rec - (first_rec + cur_pos) + 1 >= blocks_per_page) {
28928b841b3SJan Höppner if ((last_rec - blocks_per_page + 1) % blocks_per_page != 0)
29028b841b3SJan Höppner d_stop = last_rec - ((last_rec - blocks_per_page + 1) %
29128b841b3SJan Höppner blocks_per_page);
29228b841b3SJan Höppner else
29328b841b3SJan Höppner d_stop = last_rec;
29428b841b3SJan Höppner
29528b841b3SJan Höppner cur_pos += d_stop - (first_rec + cur_pos) + 1;
29628b841b3SJan Höppner count++;
29728b841b3SJan Höppner }
29828b841b3SJan Höppner
29928b841b3SJan Höppner if (cur_pos == 0 || first_rec + cur_pos - 1 < last_rec)
30028b841b3SJan Höppner count++;
30128b841b3SJan Höppner
30228b841b3SJan Höppner return count;
30328b841b3SJan Höppner }
30428b841b3SJan Höppner
30528b841b3SJan Höppner /*
30628b841b3SJan Höppner * This function builds a CCW request for block layer discard requests.
30728b841b3SJan Höppner * Each page in the z/VM hypervisor that represents certain records of an FBA
30828b841b3SJan Höppner * device will be padded with zeros. This is a special behaviour of the WRITE
30928b841b3SJan Höppner * command which is triggered when no data payload is added to the CCW.
31028b841b3SJan Höppner *
31128b841b3SJan Höppner * Note: Due to issues in some z/VM versions, we can't fully utilise this
31228b841b3SJan Höppner * special behaviour. We have to keep a 4k (or 8 block) alignment in mind to
31328b841b3SJan Höppner * work around those issues and write actual zeroes to the unaligned parts in
31428b841b3SJan Höppner * the request. This workaround might be removed in the future.
31528b841b3SJan Höppner */
dasd_fba_build_cp_discard(struct dasd_device * memdev,struct dasd_block * block,struct request * req)31628b841b3SJan Höppner static struct dasd_ccw_req *dasd_fba_build_cp_discard(
31728b841b3SJan Höppner struct dasd_device *memdev,
31828b841b3SJan Höppner struct dasd_block *block,
31928b841b3SJan Höppner struct request *req)
32028b841b3SJan Höppner {
32128b841b3SJan Höppner struct LO_fba_data *LO_data;
32228b841b3SJan Höppner struct dasd_ccw_req *cqr;
32328b841b3SJan Höppner struct ccw1 *ccw;
32428b841b3SJan Höppner
32528b841b3SJan Höppner sector_t wz_stop = 0, d_stop = 0;
32628b841b3SJan Höppner sector_t first_rec, last_rec;
32728b841b3SJan Höppner
32828b841b3SJan Höppner unsigned int blksize = block->bp_block;
32928b841b3SJan Höppner unsigned int blocks_per_page;
33028b841b3SJan Höppner int wz_count = 0;
33128b841b3SJan Höppner int d_count = 0;
33228b841b3SJan Höppner int cur_pos = 0; /* Current position within the extent */
33328b841b3SJan Höppner int count = 0;
33428b841b3SJan Höppner int cplength;
33528b841b3SJan Höppner int datasize;
33628b841b3SJan Höppner int nr_ccws;
33728b841b3SJan Höppner
33828b841b3SJan Höppner first_rec = blk_rq_pos(req) >> block->s2b_shift;
33928b841b3SJan Höppner last_rec =
34028b841b3SJan Höppner (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
34128b841b3SJan Höppner count = last_rec - first_rec + 1;
34228b841b3SJan Höppner
34328b841b3SJan Höppner blocks_per_page = BLOCKS_PER_PAGE(blksize);
34428b841b3SJan Höppner nr_ccws = count_ccws(first_rec, last_rec, blocks_per_page);
34528b841b3SJan Höppner
34628b841b3SJan Höppner /* define extent + nr_ccws * locate record + nr_ccws * single CCW */
34728b841b3SJan Höppner cplength = 1 + 2 * nr_ccws;
34828b841b3SJan Höppner datasize = sizeof(struct DE_fba_data) +
34928b841b3SJan Höppner nr_ccws * (sizeof(struct LO_fba_data) + sizeof(struct ccw1));
35028b841b3SJan Höppner
351c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev,
352c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req));
35328b841b3SJan Höppner if (IS_ERR(cqr))
35428b841b3SJan Höppner return cqr;
35528b841b3SJan Höppner
35628b841b3SJan Höppner ccw = cqr->cpaddr;
35728b841b3SJan Höppner
35828b841b3SJan Höppner define_extent(ccw++, cqr->data, WRITE, blksize, first_rec, count);
35928b841b3SJan Höppner LO_data = cqr->data + sizeof(struct DE_fba_data);
36028b841b3SJan Höppner
36128b841b3SJan Höppner /* First part is not aligned. Calculate range to write zeroes. */
36228b841b3SJan Höppner if (first_rec % blocks_per_page != 0) {
36328b841b3SJan Höppner wz_stop = first_rec + blocks_per_page -
36428b841b3SJan Höppner (first_rec % blocks_per_page) - 1;
36528b841b3SJan Höppner if (wz_stop > last_rec)
36628b841b3SJan Höppner wz_stop = last_rec;
36728b841b3SJan Höppner wz_count = wz_stop - first_rec + 1;
36828b841b3SJan Höppner
36928b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC;
37028b841b3SJan Höppner locate_record(ccw++, LO_data++, WRITE, cur_pos, wz_count);
37128b841b3SJan Höppner
37228b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC;
37328b841b3SJan Höppner ccw_write_zero(ccw++, wz_count * blksize);
37428b841b3SJan Höppner
37528b841b3SJan Höppner cur_pos = wz_count;
37628b841b3SJan Höppner }
37728b841b3SJan Höppner
37828b841b3SJan Höppner /* We can do proper discard when we've got at least blocks_per_page blocks. */
37928b841b3SJan Höppner if (last_rec - (first_rec + cur_pos) + 1 >= blocks_per_page) {
38028b841b3SJan Höppner /* is last record at page boundary? */
38128b841b3SJan Höppner if ((last_rec - blocks_per_page + 1) % blocks_per_page != 0)
38228b841b3SJan Höppner d_stop = last_rec - ((last_rec - blocks_per_page + 1) %
38328b841b3SJan Höppner blocks_per_page);
38428b841b3SJan Höppner else
38528b841b3SJan Höppner d_stop = last_rec;
38628b841b3SJan Höppner
38728b841b3SJan Höppner d_count = d_stop - (first_rec + cur_pos) + 1;
38828b841b3SJan Höppner
38928b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC;
39028b841b3SJan Höppner locate_record(ccw++, LO_data++, WRITE, cur_pos, d_count);
39128b841b3SJan Höppner
39228b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC;
39328b841b3SJan Höppner ccw_write_no_data(ccw++);
39428b841b3SJan Höppner
39528b841b3SJan Höppner cur_pos += d_count;
39628b841b3SJan Höppner }
39728b841b3SJan Höppner
39828b841b3SJan Höppner /* We might still have some bits left which need to be zeroed. */
39928b841b3SJan Höppner if (cur_pos == 0 || first_rec + cur_pos - 1 < last_rec) {
40028b841b3SJan Höppner if (d_stop != 0)
40128b841b3SJan Höppner wz_count = last_rec - d_stop;
40228b841b3SJan Höppner else if (wz_stop != 0)
40328b841b3SJan Höppner wz_count = last_rec - wz_stop;
40428b841b3SJan Höppner else
40528b841b3SJan Höppner wz_count = count;
40628b841b3SJan Höppner
40728b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC;
40828b841b3SJan Höppner locate_record(ccw++, LO_data++, WRITE, cur_pos, wz_count);
40928b841b3SJan Höppner
41028b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC;
41128b841b3SJan Höppner ccw_write_zero(ccw++, wz_count * blksize);
41228b841b3SJan Höppner }
41328b841b3SJan Höppner
41428b841b3SJan Höppner if (blk_noretry_request(req) ||
41528b841b3SJan Höppner block->base->features & DASD_FEATURE_FAILFAST)
41628b841b3SJan Höppner set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
41728b841b3SJan Höppner
41828b841b3SJan Höppner cqr->startdev = memdev;
41928b841b3SJan Höppner cqr->memdev = memdev;
42028b841b3SJan Höppner cqr->block = block;
42128b841b3SJan Höppner cqr->expires = memdev->default_expires * HZ; /* default 5 minutes */
42228b841b3SJan Höppner cqr->retries = memdev->default_retries;
42328b841b3SJan Höppner cqr->buildclk = get_tod_clock();
42428b841b3SJan Höppner cqr->status = DASD_CQR_FILLED;
42528b841b3SJan Höppner
42628b841b3SJan Höppner return cqr;
42728b841b3SJan Höppner }
42828b841b3SJan Höppner
dasd_fba_build_cp_regular(struct dasd_device * memdev,struct dasd_block * block,struct request * req)42928b841b3SJan Höppner static struct dasd_ccw_req *dasd_fba_build_cp_regular(
43028b841b3SJan Höppner struct dasd_device *memdev,
4318e09f215SStefan Weinhuber struct dasd_block *block,
4328e09f215SStefan Weinhuber struct request *req)
4331da177e4SLinus Torvalds {
434543691a4SSebastian Ott struct dasd_fba_private *private = block->base->private;
4351da177e4SLinus Torvalds unsigned long *idaws;
4361da177e4SLinus Torvalds struct LO_fba_data *LO_data;
4371da177e4SLinus Torvalds struct dasd_ccw_req *cqr;
4381da177e4SLinus Torvalds struct ccw1 *ccw;
4395705f702SNeilBrown struct req_iterator iter;
4407988613bSKent Overstreet struct bio_vec bv;
4411da177e4SLinus Torvalds char *dst;
4421da177e4SLinus Torvalds int count, cidaw, cplength, datasize;
4431da177e4SLinus Torvalds sector_t recid, first_rec, last_rec;
4441da177e4SLinus Torvalds unsigned int blksize, off;
4451da177e4SLinus Torvalds unsigned char cmd;
4461da177e4SLinus Torvalds
4471da177e4SLinus Torvalds if (rq_data_dir(req) == READ) {
4481da177e4SLinus Torvalds cmd = DASD_FBA_CCW_READ;
4491da177e4SLinus Torvalds } else if (rq_data_dir(req) == WRITE) {
4501da177e4SLinus Torvalds cmd = DASD_FBA_CCW_WRITE;
4511da177e4SLinus Torvalds } else
4521da177e4SLinus Torvalds return ERR_PTR(-EINVAL);
4538e09f215SStefan Weinhuber blksize = block->bp_block;
4541da177e4SLinus Torvalds /* Calculate record id of first and last block. */
45583096ebfSTejun Heo first_rec = blk_rq_pos(req) >> block->s2b_shift;
45683096ebfSTejun Heo last_rec =
45783096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
4581da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */
4591da177e4SLinus Torvalds count = 0;
4601da177e4SLinus Torvalds cidaw = 0;
4615705f702SNeilBrown rq_for_each_segment(bv, req, iter) {
4627988613bSKent Overstreet if (bv.bv_len & (blksize - 1))
4631da177e4SLinus Torvalds /* Fba can only do full blocks. */
4641da177e4SLinus Torvalds return ERR_PTR(-EINVAL);
4657988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9);
4667988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
4677988613bSKent Overstreet cidaw += bv.bv_len / blksize;
4681da177e4SLinus Torvalds }
4691da177e4SLinus Torvalds /* Paranoia. */
4701da177e4SLinus Torvalds if (count != last_rec - first_rec + 1)
4711da177e4SLinus Torvalds return ERR_PTR(-EINVAL);
4721da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */
4731da177e4SLinus Torvalds cplength = 2 + count;
4741da177e4SLinus Torvalds /* 1x define extent + 1x locate record */
4751da177e4SLinus Torvalds datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) +
4761da177e4SLinus Torvalds cidaw * sizeof(unsigned long);
4771da177e4SLinus Torvalds /*
4781da177e4SLinus Torvalds * Find out number of additional locate record ccws if the device
4791da177e4SLinus Torvalds * can't do data chaining.
4801da177e4SLinus Torvalds */
4811da177e4SLinus Torvalds if (private->rdc_data.mode.bits.data_chain == 0) {
4821da177e4SLinus Torvalds cplength += count - 1;
4831da177e4SLinus Torvalds datasize += (count - 1)*sizeof(struct LO_fba_data);
4841da177e4SLinus Torvalds }
4851da177e4SLinus Torvalds /* Allocate the ccw request. */
486c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev,
487c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req));
4881da177e4SLinus Torvalds if (IS_ERR(cqr))
4891da177e4SLinus Torvalds return cqr;
4901da177e4SLinus Torvalds ccw = cqr->cpaddr;
4911da177e4SLinus Torvalds /* First ccw is define extent. */
4921da177e4SLinus Torvalds define_extent(ccw++, cqr->data, rq_data_dir(req),
49383096ebfSTejun Heo block->bp_block, blk_rq_pos(req), blk_rq_sectors(req));
4941da177e4SLinus Torvalds /* Build locate_record + read/write ccws. */
4951da177e4SLinus Torvalds idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data));
4961da177e4SLinus Torvalds LO_data = (struct LO_fba_data *) (idaws + cidaw);
4971da177e4SLinus Torvalds /* Locate record for all blocks for smart devices. */
4981da177e4SLinus Torvalds if (private->rdc_data.mode.bits.data_chain != 0) {
4991da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC;
5001da177e4SLinus Torvalds locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count);
5011da177e4SLinus Torvalds }
5021da177e4SLinus Torvalds recid = first_rec;
5035705f702SNeilBrown rq_for_each_segment(bv, req, iter) {
504bf5fb875SChristoph Hellwig dst = bvec_virt(&bv);
5051da177e4SLinus Torvalds if (dasd_page_cache) {
5061da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache,
507441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN);
5081da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE)
5097988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len);
5101da177e4SLinus Torvalds if (copy)
5117988613bSKent Overstreet dst = copy + bv.bv_offset;
5121da177e4SLinus Torvalds }
5137988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) {
5141da177e4SLinus Torvalds /* Locate record for stupid devices. */
5151da177e4SLinus Torvalds if (private->rdc_data.mode.bits.data_chain == 0) {
5161da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC;
5171da177e4SLinus Torvalds locate_record(ccw, LO_data++,
5181da177e4SLinus Torvalds rq_data_dir(req),
5191da177e4SLinus Torvalds recid - first_rec, 1);
5201da177e4SLinus Torvalds ccw->flags = CCW_FLAG_CC;
5211da177e4SLinus Torvalds ccw++;
5221da177e4SLinus Torvalds } else {
5231da177e4SLinus Torvalds if (recid > first_rec)
5241da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_DC;
5251da177e4SLinus Torvalds else
5261da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC;
5271da177e4SLinus Torvalds }
5281da177e4SLinus Torvalds ccw->cmd_code = cmd;
5298e09f215SStefan Weinhuber ccw->count = block->bp_block;
5301da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) {
531b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(idaws);
5321da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA;
5331da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize);
5341da177e4SLinus Torvalds } else {
535b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(dst);
5361da177e4SLinus Torvalds ccw->flags = 0;
5371da177e4SLinus Torvalds }
5381da177e4SLinus Torvalds ccw++;
5391da177e4SLinus Torvalds dst += blksize;
5401da177e4SLinus Torvalds recid++;
5411da177e4SLinus Torvalds }
5421da177e4SLinus Torvalds }
54313de227bSHolger Smolinski if (blk_noretry_request(req) ||
54413de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST)
5451c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
5468e09f215SStefan Weinhuber cqr->startdev = memdev;
5478e09f215SStefan Weinhuber cqr->memdev = memdev;
5488e09f215SStefan Weinhuber cqr->block = block;
5497c8faa86SStefan Haberland cqr->expires = memdev->default_expires * HZ; /* default 5 minutes */
5501f1ee9adSHannes Reinecke cqr->retries = memdev->default_retries;
5511aae0560SHeiko Carstens cqr->buildclk = get_tod_clock();
5521da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED;
5531da177e4SLinus Torvalds return cqr;
5541da177e4SLinus Torvalds }
5551da177e4SLinus Torvalds
dasd_fba_build_cp(struct dasd_device * memdev,struct dasd_block * block,struct request * req)55628b841b3SJan Höppner static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device *memdev,
55728b841b3SJan Höppner struct dasd_block *block,
55828b841b3SJan Höppner struct request *req)
55928b841b3SJan Höppner {
56028b841b3SJan Höppner if (req_op(req) == REQ_OP_DISCARD || req_op(req) == REQ_OP_WRITE_ZEROES)
56128b841b3SJan Höppner return dasd_fba_build_cp_discard(memdev, block, req);
56228b841b3SJan Höppner else
56328b841b3SJan Höppner return dasd_fba_build_cp_regular(memdev, block, req);
56428b841b3SJan Höppner }
56528b841b3SJan Höppner
5661da177e4SLinus Torvalds static int
dasd_fba_free_cp(struct dasd_ccw_req * cqr,struct request * req)5671da177e4SLinus Torvalds dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req)
5681da177e4SLinus Torvalds {
569543691a4SSebastian Ott struct dasd_fba_private *private = cqr->block->base->private;
5701da177e4SLinus Torvalds struct ccw1 *ccw;
5715705f702SNeilBrown struct req_iterator iter;
5727988613bSKent Overstreet struct bio_vec bv;
5731da177e4SLinus Torvalds char *dst, *cda;
5741da177e4SLinus Torvalds unsigned int blksize, off;
5755705f702SNeilBrown int status;
5761da177e4SLinus Torvalds
5771da177e4SLinus Torvalds if (!dasd_page_cache)
5781da177e4SLinus Torvalds goto out;
5798e09f215SStefan Weinhuber blksize = cqr->block->bp_block;
5801da177e4SLinus Torvalds ccw = cqr->cpaddr;
5811da177e4SLinus Torvalds /* Skip over define extent & locate record. */
5821da177e4SLinus Torvalds ccw++;
5831da177e4SLinus Torvalds if (private->rdc_data.mode.bits.data_chain != 0)
5841da177e4SLinus Torvalds ccw++;
5855705f702SNeilBrown rq_for_each_segment(bv, req, iter) {
586bf5fb875SChristoph Hellwig dst = bvec_virt(&bv);
5877988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) {
5881da177e4SLinus Torvalds /* Skip locate record. */
5891da177e4SLinus Torvalds if (private->rdc_data.mode.bits.data_chain == 0)
5901da177e4SLinus Torvalds ccw++;
5911da177e4SLinus Torvalds if (dst) {
5921da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA)
593b87c52e4SAlexander Gordeev cda = *((char **)phys_to_virt(ccw->cda));
5941da177e4SLinus Torvalds else
595b87c52e4SAlexander Gordeev cda = phys_to_virt(ccw->cda);
5961da177e4SLinus Torvalds if (dst != cda) {
5971da177e4SLinus Torvalds if (rq_data_dir(req) == READ)
5987988613bSKent Overstreet memcpy(dst, cda, bv.bv_len);
5991da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache,
6001da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK));
6011da177e4SLinus Torvalds }
6021da177e4SLinus Torvalds dst = NULL;
6031da177e4SLinus Torvalds }
6041da177e4SLinus Torvalds ccw++;
6051da177e4SLinus Torvalds }
6061da177e4SLinus Torvalds }
6071da177e4SLinus Torvalds out:
6081da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE;
6098e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev);
6101da177e4SLinus Torvalds return status;
6111da177e4SLinus Torvalds }
6121da177e4SLinus Torvalds
dasd_fba_handle_terminated_request(struct dasd_ccw_req * cqr)6138e09f215SStefan Weinhuber static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr)
6148e09f215SStefan Weinhuber {
615a2ace466SHannes Reinecke if (cqr->retries < 0)
616a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED;
617a2ace466SHannes Reinecke else
6188e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED;
6198e09f215SStefan Weinhuber };
6208e09f215SStefan Weinhuber
6211da177e4SLinus Torvalds static int
dasd_fba_fill_info(struct dasd_device * device,struct dasd_information2_t * info)6221da177e4SLinus Torvalds dasd_fba_fill_info(struct dasd_device * device,
6231da177e4SLinus Torvalds struct dasd_information2_t * info)
6241da177e4SLinus Torvalds {
625543691a4SSebastian Ott struct dasd_fba_private *private = device->private;
626543691a4SSebastian Ott
6271da177e4SLinus Torvalds info->label_block = 1;
6281da177e4SLinus Torvalds info->FBA_layout = 1;
6291da177e4SLinus Torvalds info->format = DASD_FORMAT_LDL;
630543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data);
631543691a4SSebastian Ott memcpy(info->characteristics, &private->rdc_data,
632543691a4SSebastian Ott sizeof(private->rdc_data));
6331da177e4SLinus Torvalds info->confdata_size = 0;
6341da177e4SLinus Torvalds return 0;
6351da177e4SLinus Torvalds }
6361da177e4SLinus Torvalds
6371da177e4SLinus Torvalds static void
dasd_fba_dump_sense_dbf(struct dasd_device * device,struct irb * irb,char * reason)638aeec92caSStefan Haberland dasd_fba_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
639aeec92caSStefan Haberland char *reason)
640fc19f381SStefan Haberland {
641aeec92caSStefan Haberland u64 *sense;
642aeec92caSStefan Haberland
643aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb);
644aeec92caSStefan Haberland if (sense) {
645fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_EMERG, device,
646aeec92caSStefan Haberland "%s: %s %02x%02x%02x %016llx %016llx %016llx "
647aeec92caSStefan Haberland "%016llx", reason,
648aeec92caSStefan Haberland scsw_is_tm(&irb->scsw) ? "t" : "c",
649aeec92caSStefan Haberland scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw),
650aeec92caSStefan Haberland scsw_dstat(&irb->scsw), sense[0], sense[1],
651aeec92caSStefan Haberland sense[2], sense[3]);
652fc19f381SStefan Haberland } else {
653fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_EMERG, device, "%s",
654fc19f381SStefan Haberland "SORRY - NO VALID SENSE AVAILABLE\n");
655fc19f381SStefan Haberland }
656fc19f381SStefan Haberland }
657fc19f381SStefan Haberland
658fc19f381SStefan Haberland
659fc19f381SStefan Haberland static void
dasd_fba_dump_sense(struct dasd_device * device,struct dasd_ccw_req * req,struct irb * irb)6601da177e4SLinus Torvalds dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
6611da177e4SLinus Torvalds struct irb *irb)
6621da177e4SLinus Torvalds {
6631da177e4SLinus Torvalds char *page;
6641da177e4SLinus Torvalds struct ccw1 *act, *end, *last;
6651da177e4SLinus Torvalds int len, sl, sct, count;
6661da177e4SLinus Torvalds
6671da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC);
6681da177e4SLinus Torvalds if (page == NULL) {
669fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s",
6701da177e4SLinus Torvalds "No memory to dump sense data");
6711da177e4SLinus Torvalds return;
6721da177e4SLinus Torvalds }
673773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER
6741da177e4SLinus Torvalds " I/O status report for device %s:\n",
6752a0217d5SKay Sievers dev_name(&device->cdev->dev));
676773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER
6771da177e4SLinus Torvalds " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
67823d805b6SPeter Oberparleiter irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
679773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER
6801da177e4SLinus Torvalds " device %s: Failing CCW: %p\n",
6812a0217d5SKay Sievers dev_name(&device->cdev->dev),
68223d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa);
6831da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) {
6841da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) {
685773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER
6861da177e4SLinus Torvalds " Sense(hex) %2d-%2d:",
6871da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7));
6881da177e4SLinus Torvalds
6891da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) {
6901da177e4SLinus Torvalds len += sprintf(page + len, " %02x",
6911da177e4SLinus Torvalds irb->ecw[8 * sl + sct]);
6921da177e4SLinus Torvalds }
6931da177e4SLinus Torvalds len += sprintf(page + len, "\n");
6941da177e4SLinus Torvalds }
6951da177e4SLinus Torvalds } else {
696773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER
6971da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n");
6981da177e4SLinus Torvalds }
699fc19f381SStefan Haberland printk(KERN_ERR "%s", page);
7001da177e4SLinus Torvalds
7011da177e4SLinus Torvalds /* dump the Channel Program */
7021da177e4SLinus Torvalds /* print first CCWs (maximum 8) */
7031da177e4SLinus Torvalds act = req->cpaddr;
7041da177e4SLinus Torvalds for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
7051da177e4SLinus Torvalds end = min(act + 8, last);
706773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER " Related CP in req: %p\n", req);
7071da177e4SLinus Torvalds while (act <= end) {
708773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER
7091da177e4SLinus Torvalds " CCW %p: %08X %08X DAT:",
7101da177e4SLinus Torvalds act, ((int *) act)[0], ((int *) act)[1]);
7111da177e4SLinus Torvalds for (count = 0; count < 32 && count < act->count;
7121da177e4SLinus Torvalds count += sizeof(int))
7131da177e4SLinus Torvalds len += sprintf(page + len, " %08X",
7141da177e4SLinus Torvalds ((int *) (addr_t) act->cda)
7151da177e4SLinus Torvalds [(count>>2)]);
7161da177e4SLinus Torvalds len += sprintf(page + len, "\n");
7171da177e4SLinus Torvalds act++;
7181da177e4SLinus Torvalds }
719fc19f381SStefan Haberland printk(KERN_ERR "%s", page);
7201da177e4SLinus Torvalds
7211da177e4SLinus Torvalds
7221da177e4SLinus Torvalds /* print failing CCW area */
7231da177e4SLinus Torvalds len = 0;
72423d805b6SPeter Oberparleiter if (act < ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2) {
72523d805b6SPeter Oberparleiter act = ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2;
726773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n");
7271da177e4SLinus Torvalds }
72823d805b6SPeter Oberparleiter end = min((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa + 2, last);
7291da177e4SLinus Torvalds while (act <= end) {
730773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER
7311da177e4SLinus Torvalds " CCW %p: %08X %08X DAT:",
7321da177e4SLinus Torvalds act, ((int *) act)[0], ((int *) act)[1]);
7331da177e4SLinus Torvalds for (count = 0; count < 32 && count < act->count;
7341da177e4SLinus Torvalds count += sizeof(int))
7351da177e4SLinus Torvalds len += sprintf(page + len, " %08X",
7361da177e4SLinus Torvalds ((int *) (addr_t) act->cda)
7371da177e4SLinus Torvalds [(count>>2)]);
7381da177e4SLinus Torvalds len += sprintf(page + len, "\n");
7391da177e4SLinus Torvalds act++;
7401da177e4SLinus Torvalds }
7411da177e4SLinus Torvalds
7421da177e4SLinus Torvalds /* print last CCWs */
7431da177e4SLinus Torvalds if (act < last - 2) {
7441da177e4SLinus Torvalds act = last - 2;
745773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n");
7461da177e4SLinus Torvalds }
7471da177e4SLinus Torvalds while (act <= last) {
748773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER
7491da177e4SLinus Torvalds " CCW %p: %08X %08X DAT:",
7501da177e4SLinus Torvalds act, ((int *) act)[0], ((int *) act)[1]);
7511da177e4SLinus Torvalds for (count = 0; count < 32 && count < act->count;
7521da177e4SLinus Torvalds count += sizeof(int))
7531da177e4SLinus Torvalds len += sprintf(page + len, " %08X",
7541da177e4SLinus Torvalds ((int *) (addr_t) act->cda)
7551da177e4SLinus Torvalds [(count>>2)]);
7561da177e4SLinus Torvalds len += sprintf(page + len, "\n");
7571da177e4SLinus Torvalds act++;
7581da177e4SLinus Torvalds }
7591da177e4SLinus Torvalds if (len > 0)
760fc19f381SStefan Haberland printk(KERN_ERR "%s", page);
7611da177e4SLinus Torvalds free_page((unsigned long) page);
7621da177e4SLinus Torvalds }
7631da177e4SLinus Torvalds
7641da177e4SLinus Torvalds /*
765a0610a8aSJan Höppner * Initialize block layer request queue.
7661da177e4SLinus Torvalds */
dasd_fba_setup_blk_queue(struct dasd_block * block)767a0610a8aSJan Höppner static void dasd_fba_setup_blk_queue(struct dasd_block *block)
768a0610a8aSJan Höppner {
769a0610a8aSJan Höppner unsigned int logical_block_size = block->bp_block;
770c68f4f4eSChristoph Hellwig struct request_queue *q = block->gdp->queue;
771a0610a8aSJan Höppner unsigned int max_bytes, max_discard_sectors;
772a0610a8aSJan Höppner int max;
773a0610a8aSJan Höppner
774a0610a8aSJan Höppner max = DASD_FBA_MAX_BLOCKS << block->s2b_shift;
775a0610a8aSJan Höppner blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
776a0610a8aSJan Höppner q->limits.max_dev_sectors = max;
777a0610a8aSJan Höppner blk_queue_logical_block_size(q, logical_block_size);
778a0610a8aSJan Höppner blk_queue_max_hw_sectors(q, max);
779a0610a8aSJan Höppner blk_queue_max_segments(q, USHRT_MAX);
780a0610a8aSJan Höppner /* With page sized segments each segment can be translated into one idaw/tidaw */
781a0610a8aSJan Höppner blk_queue_max_segment_size(q, PAGE_SIZE);
782a0610a8aSJan Höppner blk_queue_segment_boundary(q, PAGE_SIZE - 1);
783a0610a8aSJan Höppner
784a0610a8aSJan Höppner q->limits.discard_granularity = logical_block_size;
785a0610a8aSJan Höppner
786a0610a8aSJan Höppner /* Calculate max_discard_sectors and make it PAGE aligned */
787a0610a8aSJan Höppner max_bytes = USHRT_MAX * logical_block_size;
788b5444153SJan Höppner max_bytes = ALIGN_DOWN(max_bytes, PAGE_SIZE);
789a0610a8aSJan Höppner max_discard_sectors = max_bytes / logical_block_size;
790a0610a8aSJan Höppner
791a0610a8aSJan Höppner blk_queue_max_discard_sectors(q, max_discard_sectors);
792a0610a8aSJan Höppner blk_queue_max_write_zeroes_sectors(q, max_discard_sectors);
793a0610a8aSJan Höppner }
794a0610a8aSJan Höppner
dasd_fba_pe_handler(struct dasd_device * device,__u8 tbvpm,__u8 fcsecpm)795c0c8a839SStefan Haberland static int dasd_fba_pe_handler(struct dasd_device *device,
796c0c8a839SStefan Haberland __u8 tbvpm, __u8 fcsecpm)
797c0c8a839SStefan Haberland {
798c0c8a839SStefan Haberland return dasd_generic_verify_path(device, tbvpm);
799c0c8a839SStefan Haberland }
800c0c8a839SStefan Haberland
8011da177e4SLinus Torvalds static struct dasd_discipline dasd_fba_discipline = {
8021da177e4SLinus Torvalds .owner = THIS_MODULE,
8031da177e4SLinus Torvalds .name = "FBA ",
8041da177e4SLinus Torvalds .ebcname = "FBA ",
8051da177e4SLinus Torvalds .check_device = dasd_fba_check_characteristics,
8061da177e4SLinus Torvalds .do_analysis = dasd_fba_do_analysis,
807c0c8a839SStefan Haberland .pe_handler = dasd_fba_pe_handler,
808a0610a8aSJan Höppner .setup_blk_queue = dasd_fba_setup_blk_queue,
8091da177e4SLinus Torvalds .fill_geometry = dasd_fba_fill_geometry,
8101da177e4SLinus Torvalds .start_IO = dasd_start_IO,
8111da177e4SLinus Torvalds .term_IO = dasd_term_IO,
8128e09f215SStefan Weinhuber .handle_terminated_request = dasd_fba_handle_terminated_request,
8131da177e4SLinus Torvalds .erp_action = dasd_fba_erp_action,
8141da177e4SLinus Torvalds .erp_postaction = dasd_fba_erp_postaction,
8155a27e60dSStefan Weinhuber .check_for_device_change = dasd_fba_check_for_device_change,
8161da177e4SLinus Torvalds .build_cp = dasd_fba_build_cp,
8171da177e4SLinus Torvalds .free_cp = dasd_fba_free_cp,
8181da177e4SLinus Torvalds .dump_sense = dasd_fba_dump_sense,
819fc19f381SStefan Haberland .dump_sense_dbf = dasd_fba_dump_sense_dbf,
8201da177e4SLinus Torvalds .fill_info = dasd_fba_fill_info,
8211da177e4SLinus Torvalds };
8221da177e4SLinus Torvalds
8231da177e4SLinus Torvalds static int __init
dasd_fba_init(void)8241da177e4SLinus Torvalds dasd_fba_init(void)
8251da177e4SLinus Torvalds {
826736e6ea0SSebastian Ott int ret;
827736e6ea0SSebastian Ott
8281da177e4SLinus Torvalds ASCEBC(dasd_fba_discipline.ebcname, 4);
829709192d5SJan Höppner
830709192d5SJan Höppner dasd_fba_zero_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
831709192d5SJan Höppner if (!dasd_fba_zero_page)
832709192d5SJan Höppner return -ENOMEM;
833709192d5SJan Höppner
834736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_fba_driver);
835736e6ea0SSebastian Ott if (!ret)
836736e6ea0SSebastian Ott wait_for_device_probe();
837736e6ea0SSebastian Ott
838736e6ea0SSebastian Ott return ret;
8391da177e4SLinus Torvalds }
8401da177e4SLinus Torvalds
8411da177e4SLinus Torvalds static void __exit
dasd_fba_cleanup(void)8421da177e4SLinus Torvalds dasd_fba_cleanup(void)
8431da177e4SLinus Torvalds {
8441da177e4SLinus Torvalds ccw_driver_unregister(&dasd_fba_driver);
845709192d5SJan Höppner free_page((unsigned long)dasd_fba_zero_page);
8461da177e4SLinus Torvalds }
8471da177e4SLinus Torvalds
8481da177e4SLinus Torvalds module_init(dasd_fba_init);
8491da177e4SLinus Torvalds module_exit(dasd_fba_cleanup);
850