2 * drivers/s390/cio/chsc.c
3 * S/390 common I/O routines -- channel subsystem call
5 * Copyright (C) 1999-2002 IBM Deutschland Entwicklung GmbH,
7 * Author(s): Ingo Adlung (adlung@de.ibm.com)
8 * Cornelia Huck (cornelia.huck@de.ibm.com)
9 * Arnd Bergmann (arndb@de.ibm.com)
12 #include <linux/module.h>
13 #include <linux/slab.h>
14 #include <linux/init.h>
15 #include <linux/device.h>
18 #include <asm/chpid.h>
22 #include "cio_debug.h"
27 static void *sei_page;
29 struct chsc_ssd_area {
30 struct chsc_header request;
34 u16 f_sch; /* first subchannel */
36 u16 l_sch; /* last subchannel */
38 struct chsc_header response;
42 u8 st : 3; /* subchannel type */
44 u8 unit_addr; /* unit address */
45 u16 devno; /* device number */
48 u16 sch; /* subchannel */
49 u8 chpid[8]; /* chpids 0-7 */
50 u16 fla[8]; /* full link addresses 0-7 */
51 } __attribute__ ((packed));
53 int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
56 struct chsc_ssd_area *ssd_area;
62 page = get_zeroed_page(GFP_KERNEL | GFP_DMA);
65 ssd_area = (struct chsc_ssd_area *) page;
66 ssd_area->request.length = 0x0010;
67 ssd_area->request.code = 0x0004;
68 ssd_area->ssid = schid.ssid;
69 ssd_area->f_sch = schid.sch_no;
70 ssd_area->l_sch = schid.sch_no;
72 ccode = chsc(ssd_area);
75 ret = (ccode == 3) ? -ENODEV : -EBUSY;
78 if (ssd_area->response.code != 0x0001) {
79 CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n",
80 schid.ssid, schid.sch_no,
81 ssd_area->response.code);
85 if (!ssd_area->sch_valid) {
91 memset(ssd, 0, sizeof(struct chsc_ssd_info));
92 if ((ssd_area->st != 0) && (ssd_area->st != 2))
94 ssd->path_mask = ssd_area->path_mask;
95 ssd->fla_valid_mask = ssd_area->fla_valid_mask;
96 for (i = 0; i < 8; i++) {
98 if (ssd_area->path_mask & mask) {
99 chp_id_init(&ssd->chpid[i]);
100 ssd->chpid[i].id = ssd_area->chpid[i];
102 if (ssd_area->fla_valid_mask & mask)
103 ssd->fla[i] = ssd_area->fla[i];
110 static int check_for_io_on_path(struct subchannel *sch, int mask)
114 cc = stsch(sch->schid, &sch->schib);
117 if (sch->schib.scsw.actl && sch->schib.pmcw.lpum == mask)
122 static void terminate_internal_io(struct subchannel *sch)
124 if (cio_clear(sch)) {
125 /* Recheck device in case clear failed. */
127 if (device_trigger_verify(sch) != 0)
128 css_schedule_eval(sch->schid);
131 /* Request retry of internal operation. */
132 device_set_intretry(sch);
134 if (sch->driver && sch->driver->termination)
135 sch->driver->termination(&sch->dev);
139 s390_subchannel_remove_chpid(struct device *dev, void *data)
143 struct subchannel *sch;
144 struct chp_id *chpid;
147 sch = to_subchannel(dev);
149 for (j = 0; j < 8; j++) {
151 if ((sch->schib.pmcw.pim & mask) &&
152 (sch->schib.pmcw.chpid[j] == chpid->id))
158 spin_lock_irq(sch->lock);
160 stsch(sch->schid, &schib);
163 memcpy(&sch->schib, &schib, sizeof(struct schib));
164 /* Check for single path devices. */
165 if (sch->schib.pmcw.pim == 0x80)
168 if (check_for_io_on_path(sch, mask)) {
169 if (device_is_online(sch))
172 terminate_internal_io(sch);
173 /* Re-start path verification. */
174 if (sch->driver && sch->driver->verify)
175 sch->driver->verify(&sch->dev);
178 /* trigger path verification. */
179 if (sch->driver && sch->driver->verify)
180 sch->driver->verify(&sch->dev);
181 else if (sch->lpm == mask)
185 spin_unlock_irq(sch->lock);
190 spin_unlock_irq(sch->lock);
191 css_schedule_eval(sch->schid);
195 void chsc_chp_offline(struct chp_id chpid)
199 sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id);
200 CIO_TRACE_EVENT(2, dbf_txt);
202 if (chp_get_status(chpid) <= 0)
204 bus_for_each_dev(&css_bus_type, NULL, &chpid,
205 s390_subchannel_remove_chpid);
209 s390_process_res_acc_new_sch(struct subchannel_id schid)
213 * We don't know the device yet, but since a path
214 * may be available now to the device we'll have
215 * to do recognition again.
216 * Since we don't have any idea about which chpid
217 * that beast may be on we'll have to do a stsch
218 * on all devices, grr...
220 if (stsch_err(schid, &schib))
224 /* Put it on the slow path. */
225 css_schedule_eval(schid);
229 struct res_acc_data {
235 static int get_res_chpid_mask(struct chsc_ssd_info *ssd,
236 struct res_acc_data *data)
241 for (i = 0; i < 8; i++) {
243 if (!(ssd->path_mask & mask))
245 if (!chp_id_is_equal(&ssd->chpid[i], &data->chpid))
247 if ((ssd->fla_valid_mask & mask) &&
248 ((ssd->fla[i] & data->fla_mask) != data->fla))
256 __s390_process_res_acc(struct subchannel_id schid, void *data)
258 int chp_mask, old_lpm;
259 struct res_acc_data *res_data;
260 struct subchannel *sch;
263 sch = get_subchannel_by_schid(schid);
265 /* Check if a subchannel is newly available. */
266 return s390_process_res_acc_new_sch(schid);
268 spin_lock_irq(sch->lock);
269 chp_mask = get_res_chpid_mask(&sch->ssd_info, res_data);
272 if (stsch(sch->schid, &sch->schib))
275 sch->lpm = ((sch->schib.pmcw.pim &
276 sch->schib.pmcw.pam &
278 | chp_mask) & sch->opm;
279 if (!old_lpm && sch->lpm)
280 device_trigger_reprobe(sch);
281 else if (sch->driver && sch->driver->verify)
282 sch->driver->verify(&sch->dev);
284 spin_unlock_irq(sch->lock);
285 put_device(&sch->dev);
289 static void s390_process_res_acc (struct res_acc_data *res_data)
293 sprintf(dbf_txt, "accpr%x.%02x", res_data->chpid.cssid,
295 CIO_TRACE_EVENT( 2, dbf_txt);
296 if (res_data->fla != 0) {
297 sprintf(dbf_txt, "fla%x", res_data->fla);
298 CIO_TRACE_EVENT( 2, dbf_txt);
302 * I/O resources may have become accessible.
303 * Scan through all subchannels that may be concerned and
304 * do a validation on those.
305 * The more information we have (info), the less scanning
306 * will we have to do.
308 for_each_subchannel(__s390_process_res_acc, res_data);
312 __get_chpid_from_lir(void *data)
318 /* incident-node descriptor */
320 /* attached-node descriptor */
322 /* incident-specific information */
324 } __attribute__ ((packed)) *lir;
328 /* NULL link incident record */
330 if (!(lir->indesc[0]&0xc0000000))
331 /* node descriptor not valid */
333 if (!(lir->indesc[0]&0x10000000))
334 /* don't handle device-type nodes - FIXME */
336 /* Byte 3 contains the chpid. Could also be CTCA, but we don't care */
338 return (u16) (lir->indesc[0]&0x000000ff);
341 struct chsc_sei_area {
342 struct chsc_header request;
346 struct chsc_header response;
349 u8 vf; /* validity flags */
350 u8 rs; /* reporting source */
351 u8 cc; /* content code */
352 u16 fla; /* full link address */
353 u16 rsid; /* reporting source id */
356 u8 ccdf[4096 - 16 - 24]; /* content-code dependent field */
357 /* ccdf has to be big enough for a link-incident record */
358 } __attribute__ ((packed));
360 static void chsc_process_sei_link_incident(struct chsc_sei_area *sei_area)
365 CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n",
366 sei_area->rs, sei_area->rsid);
367 if (sei_area->rs != 4)
369 id = __get_chpid_from_lir(sei_area->ccdf);
371 CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n");
375 chsc_chp_offline(chpid);
379 static void chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
381 struct res_acc_data res_data;
385 CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, "
386 "rs_id=%04x)\n", sei_area->rs, sei_area->rsid);
387 if (sei_area->rs != 4)
390 chpid.id = sei_area->rsid;
391 /* allocate a new channel path structure, if needed */
392 status = chp_get_status(chpid);
397 memset(&res_data, 0, sizeof(struct res_acc_data));
398 res_data.chpid = chpid;
399 if ((sei_area->vf & 0xc0) != 0) {
400 res_data.fla = sei_area->fla;
401 if ((sei_area->vf & 0xc0) == 0xc0)
402 /* full link address */
403 res_data.fla_mask = 0xffff;
406 res_data.fla_mask = 0xff00;
408 s390_process_res_acc(&res_data);
411 struct chp_config_data {
417 static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area)
419 struct chp_config_data *data;
423 CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
424 if (sei_area->rs != 0)
426 data = (struct chp_config_data *) &(sei_area->ccdf);
428 for (num = 0; num <= __MAX_CHPID; num++) {
429 if (!chp_test_bit(data->map, num))
432 printk(KERN_WARNING "cio: processing configure event %d for "
433 "chpid %x.%02x\n", data->op, chpid.cssid, chpid.id);
436 chp_cfg_schedule(chpid, 1);
439 chp_cfg_schedule(chpid, 0);
442 chp_cfg_cancel_deconfigure(chpid);
448 static void chsc_process_sei(struct chsc_sei_area *sei_area)
450 /* Check if we might have lost some information. */
451 if (sei_area->flags & 0x40) {
452 CIO_CRW_EVENT(2, "chsc: event overflow\n");
453 css_schedule_eval_all();
455 /* which kind of information was stored? */
456 switch (sei_area->cc) {
457 case 1: /* link incident*/
458 chsc_process_sei_link_incident(sei_area);
460 case 2: /* i/o resource accessibiliy */
461 chsc_process_sei_res_acc(sei_area);
463 case 8: /* channel-path-configuration notification */
464 chsc_process_sei_chp_config(sei_area);
466 default: /* other stuff */
467 CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n",
473 void chsc_process_crw(void)
475 struct chsc_sei_area *sei_area;
479 /* Access to sei_page is serialized through machine check handler
480 * thread, so no need for locking. */
483 CIO_TRACE_EVENT( 2, "prcss");
485 memset(sei_area, 0, sizeof(*sei_area));
486 sei_area->request.length = 0x0010;
487 sei_area->request.code = 0x000e;
491 if (sei_area->response.code == 0x0001) {
492 CIO_CRW_EVENT(4, "chsc: sei successful\n");
493 chsc_process_sei(sei_area);
495 CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n",
496 sei_area->response.code);
499 } while (sei_area->flags & 0x80);
503 __chp_add_new_sch(struct subchannel_id schid)
507 if (stsch_err(schid, &schib))
511 /* Put it on the slow path. */
512 css_schedule_eval(schid);
518 __chp_add(struct subchannel_id schid, void *data)
521 struct chp_id *chpid;
522 struct subchannel *sch;
525 sch = get_subchannel_by_schid(schid);
527 /* Check if the subchannel is now available. */
528 return __chp_add_new_sch(schid);
529 spin_lock_irq(sch->lock);
530 for (i=0; i<8; i++) {
532 if ((sch->schib.pmcw.pim & mask) &&
533 (sch->schib.pmcw.chpid[i] == chpid->id)) {
534 if (stsch(sch->schid, &sch->schib) != 0) {
536 spin_unlock_irq(sch->lock);
543 spin_unlock_irq(sch->lock);
546 sch->lpm = ((sch->schib.pmcw.pim &
547 sch->schib.pmcw.pam &
551 if (sch->driver && sch->driver->verify)
552 sch->driver->verify(&sch->dev);
554 spin_unlock_irq(sch->lock);
555 put_device(&sch->dev);
559 void chsc_chp_online(struct chp_id chpid)
563 sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
564 CIO_TRACE_EVENT(2, dbf_txt);
566 if (chp_get_status(chpid) != 0)
567 for_each_subchannel(__chp_add, &chpid);
570 static void __s390_subchannel_vary_chpid(struct subchannel *sch,
571 struct chp_id chpid, int on)
577 spin_lock_irqsave(sch->lock, flags);
579 for (chp = 0; chp < 8; chp++) {
581 if (!(sch->ssd_info.path_mask & mask))
583 if (!chp_id_is_equal(&sch->ssd_info.chpid[chp], &chpid))
590 device_trigger_reprobe(sch);
591 else if (sch->driver && sch->driver->verify)
592 sch->driver->verify(&sch->dev);
597 if (check_for_io_on_path(sch, mask)) {
598 if (device_is_online(sch))
599 /* Path verification is done after killing. */
602 /* Kill and retry internal I/O. */
603 terminate_internal_io(sch);
604 /* Re-start path verification. */
605 if (sch->driver && sch->driver->verify)
606 sch->driver->verify(&sch->dev);
608 } else if (!sch->lpm) {
609 if (device_trigger_verify(sch) != 0)
610 css_schedule_eval(sch->schid);
611 } else if (sch->driver && sch->driver->verify)
612 sch->driver->verify(&sch->dev);
615 spin_unlock_irqrestore(sch->lock, flags);
618 static int s390_subchannel_vary_chpid_off(struct device *dev, void *data)
620 struct subchannel *sch;
621 struct chp_id *chpid;
623 sch = to_subchannel(dev);
626 __s390_subchannel_vary_chpid(sch, *chpid, 0);
630 static int s390_subchannel_vary_chpid_on(struct device *dev, void *data)
632 struct subchannel *sch;
633 struct chp_id *chpid;
635 sch = to_subchannel(dev);
638 __s390_subchannel_vary_chpid(sch, *chpid, 1);
643 __s390_vary_chpid_on(struct subchannel_id schid, void *data)
646 struct subchannel *sch;
648 sch = get_subchannel_by_schid(schid);
650 put_device(&sch->dev);
653 if (stsch_err(schid, &schib))
656 /* Put it on the slow path. */
657 css_schedule_eval(schid);
662 * chsc_chp_vary - propagate channel-path vary operation to subchannels
663 * @chpid: channl-path ID
664 * @on: non-zero for vary online, zero for vary offline
666 int chsc_chp_vary(struct chp_id chpid, int on)
669 * Redo PathVerification on the devices the chpid connects to
672 bus_for_each_dev(&css_bus_type, NULL, &chpid, on ?
673 s390_subchannel_vary_chpid_on :
674 s390_subchannel_vary_chpid_off);
676 /* Scan for new devices on varied on path. */
677 for_each_subchannel(__s390_vary_chpid_on, NULL);
682 chsc_remove_cmg_attr(struct channel_subsystem *css)
686 for (i = 0; i <= __MAX_CHPID; i++) {
689 chp_remove_cmg_attr(css->chps[i]);
694 chsc_add_cmg_attr(struct channel_subsystem *css)
699 for (i = 0; i <= __MAX_CHPID; i++) {
702 ret = chp_add_cmg_attr(css->chps[i]);
708 for (--i; i >= 0; i--) {
711 chp_remove_cmg_attr(css->chps[i]);
717 __chsc_do_secm(struct channel_subsystem *css, int enable, void *page)
720 struct chsc_header request;
721 u32 operation_code : 2;
730 struct chsc_header response;
735 } __attribute__ ((packed)) *secm_area;
739 secm_area->request.length = 0x0050;
740 secm_area->request.code = 0x0016;
742 secm_area->key = PAGE_DEFAULT_KEY;
743 secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1;
744 secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2;
746 secm_area->operation_code = enable ? 0 : 1;
748 ccode = chsc(secm_area);
750 return (ccode == 3) ? -ENODEV : -EBUSY;
752 switch (secm_area->response.code) {
753 case 0x0001: /* Success. */
756 case 0x0003: /* Invalid block. */
757 case 0x0007: /* Invalid format. */
758 case 0x0008: /* Other invalid block. */
759 CIO_CRW_EVENT(2, "Error in chsc request block!\n");
762 case 0x0004: /* Command not provided in model. */
763 CIO_CRW_EVENT(2, "Model does not provide secm\n");
766 case 0x0102: /* cub adresses incorrect */
767 CIO_CRW_EVENT(2, "Invalid addresses in chsc request block\n");
770 case 0x0103: /* key error */
771 CIO_CRW_EVENT(2, "Access key error in secm\n");
774 case 0x0105: /* error while starting */
775 CIO_CRW_EVENT(2, "Error while starting channel measurement\n");
779 CIO_CRW_EVENT(2, "Unknown CHSC response %d\n",
780 secm_area->response.code);
787 chsc_secm(struct channel_subsystem *css, int enable)
792 secm_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
796 mutex_lock(&css->mutex);
797 if (enable && !css->cm_enabled) {
798 css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
799 css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
800 if (!css->cub_addr1 || !css->cub_addr2) {
801 free_page((unsigned long)css->cub_addr1);
802 free_page((unsigned long)css->cub_addr2);
803 free_page((unsigned long)secm_area);
804 mutex_unlock(&css->mutex);
808 ret = __chsc_do_secm(css, enable, secm_area);
810 css->cm_enabled = enable;
811 if (css->cm_enabled) {
812 ret = chsc_add_cmg_attr(css);
814 memset(secm_area, 0, PAGE_SIZE);
815 __chsc_do_secm(css, 0, secm_area);
819 chsc_remove_cmg_attr(css);
821 if (!css->cm_enabled) {
822 free_page((unsigned long)css->cub_addr1);
823 free_page((unsigned long)css->cub_addr2);
825 mutex_unlock(&css->mutex);
826 free_page((unsigned long)secm_area);
830 int chsc_determine_channel_path_description(struct chp_id chpid,
831 struct channel_path_desc *desc)
836 struct chsc_header request;
842 struct chsc_header response;
844 struct channel_path_desc desc;
845 } __attribute__ ((packed)) *scpd_area;
847 scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
851 scpd_area->request.length = 0x0010;
852 scpd_area->request.code = 0x0002;
854 scpd_area->first_chpid = chpid.id;
855 scpd_area->last_chpid = chpid.id;
857 ccode = chsc(scpd_area);
859 ret = (ccode == 3) ? -ENODEV : -EBUSY;
863 switch (scpd_area->response.code) {
864 case 0x0001: /* Success. */
865 memcpy(desc, &scpd_area->desc,
866 sizeof(struct channel_path_desc));
869 case 0x0003: /* Invalid block. */
870 case 0x0007: /* Invalid format. */
871 case 0x0008: /* Other invalid block. */
872 CIO_CRW_EVENT(2, "Error in chsc request block!\n");
875 case 0x0004: /* Command not provided in model. */
876 CIO_CRW_EVENT(2, "Model does not provide scpd\n");
880 CIO_CRW_EVENT(2, "Unknown CHSC response %d\n",
881 scpd_area->response.code);
885 free_page((unsigned long)scpd_area);
890 chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
891 struct cmg_chars *chars)
896 chp->cmg_chars = kmalloc(sizeof(struct cmg_chars),
898 if (chp->cmg_chars) {
900 struct cmg_chars *cmg_chars;
902 cmg_chars = chp->cmg_chars;
903 for (i = 0; i < NR_MEASUREMENT_CHARS; i++) {
904 mask = 0x80 >> (i + 3);
906 cmg_chars->values[i] = chars->values[i];
908 cmg_chars->values[i] = 0;
913 /* No cmg-dependent data. */
918 int chsc_get_channel_measurement_chars(struct channel_path *chp)
923 struct chsc_header request;
929 struct chsc_header response;
940 u32 data[NR_MEASUREMENT_CHARS];
941 } __attribute__ ((packed)) *scmc_area;
943 scmc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
947 scmc_area->request.length = 0x0010;
948 scmc_area->request.code = 0x0022;
950 scmc_area->first_chpid = chp->chpid.id;
951 scmc_area->last_chpid = chp->chpid.id;
953 ccode = chsc(scmc_area);
955 ret = (ccode == 3) ? -ENODEV : -EBUSY;
959 switch (scmc_area->response.code) {
960 case 0x0001: /* Success. */
961 if (!scmc_area->not_valid) {
962 chp->cmg = scmc_area->cmg;
963 chp->shared = scmc_area->shared;
964 chsc_initialize_cmg_chars(chp, scmc_area->cmcv,
973 case 0x0003: /* Invalid block. */
974 case 0x0007: /* Invalid format. */
975 case 0x0008: /* Invalid bit combination. */
976 CIO_CRW_EVENT(2, "Error in chsc request block!\n");
979 case 0x0004: /* Command not provided. */
980 CIO_CRW_EVENT(2, "Model does not provide scmc\n");
984 CIO_CRW_EVENT(2, "Unknown CHSC response %d\n",
985 scmc_area->response.code);
989 free_page((unsigned long)scmc_area);
994 chsc_alloc_sei_area(void)
996 sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
998 CIO_MSG_EVENT(0, "Can't allocate page for processing of "
999 "chsc machine checks!\n");
1000 return (sei_page ? 0 : -ENOMEM);
1004 chsc_enable_facility(int operation_code)
1008 struct chsc_header request;
1015 u32 operation_data_area[252];
1016 struct chsc_header response;
1020 } __attribute__ ((packed)) *sda_area;
1022 sda_area = (void *)get_zeroed_page(GFP_KERNEL|GFP_DMA);
1025 sda_area->request.length = 0x0400;
1026 sda_area->request.code = 0x0031;
1027 sda_area->operation_code = operation_code;
1029 ret = chsc(sda_area);
1031 ret = (ret == 3) ? -ENODEV : -EBUSY;
1034 switch (sda_area->response.code) {
1035 case 0x0001: /* everything ok */
1038 case 0x0003: /* invalid request block */
1042 case 0x0004: /* command not provided */
1043 case 0x0101: /* facility not provided */
1046 default: /* something went wrong */
1050 free_page((unsigned long)sda_area);
1054 subsys_initcall(chsc_alloc_sei_area);
1056 struct css_general_char css_general_characteristics;
1057 struct css_chsc_char css_chsc_characteristics;
1060 chsc_determine_css_characteristics(void)
1064 struct chsc_header request;
1068 struct chsc_header response;
1070 u32 general_char[510];
1072 } __attribute__ ((packed)) *scsc_area;
1074 scsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
1076 CIO_MSG_EVENT(0, "Was not able to determine available"
1077 "CHSCs due to no memory.\n");
1081 scsc_area->request.length = 0x0010;
1082 scsc_area->request.code = 0x0010;
1084 result = chsc(scsc_area);
1086 CIO_MSG_EVENT(0, "Was not able to determine available CHSCs, "
1087 "cc=%i.\n", result);
1092 if (scsc_area->response.code != 1) {
1093 CIO_MSG_EVENT(0, "Was not able to determine "
1094 "available CHSCs.\n");
1098 memcpy(&css_general_characteristics, scsc_area->general_char,
1099 sizeof(css_general_characteristics));
1100 memcpy(&css_chsc_characteristics, scsc_area->chsc_char,
1101 sizeof(css_chsc_characteristics));
1103 free_page ((unsigned long) scsc_area);
1107 EXPORT_SYMBOL_GPL(css_general_characteristics);
1108 EXPORT_SYMBOL_GPL(css_chsc_characteristics);