967 lines
22 KiB
C
967 lines
22 KiB
C
/*
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* drivers/s390/cio/chsc.c
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* S/390 common I/O routines -- channel subsystem call
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*
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* Copyright IBM Corp. 1999,2008
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* Author(s): Ingo Adlung (adlung@de.ibm.com)
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* Cornelia Huck (cornelia.huck@de.ibm.com)
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* Arnd Bergmann (arndb@de.ibm.com)
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <asm/cio.h>
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#include <asm/chpid.h>
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#include <asm/chsc.h>
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#include "../s390mach.h"
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#include "css.h"
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#include "cio.h"
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#include "cio_debug.h"
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#include "ioasm.h"
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#include "chp.h"
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#include "chsc.h"
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static void *sei_page;
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static int chsc_error_from_response(int response)
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{
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switch (response) {
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case 0x0001:
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return 0;
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case 0x0002:
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case 0x0003:
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case 0x0006:
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case 0x0007:
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case 0x0008:
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case 0x000a:
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return -EINVAL;
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case 0x0004:
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return -EOPNOTSUPP;
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default:
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return -EIO;
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}
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}
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struct chsc_ssd_area {
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struct chsc_header request;
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u16 :10;
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u16 ssid:2;
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u16 :4;
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u16 f_sch; /* first subchannel */
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u16 :16;
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u16 l_sch; /* last subchannel */
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u32 :32;
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struct chsc_header response;
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u32 :32;
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u8 sch_valid : 1;
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u8 dev_valid : 1;
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u8 st : 3; /* subchannel type */
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u8 zeroes : 3;
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u8 unit_addr; /* unit address */
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u16 devno; /* device number */
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u8 path_mask;
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u8 fla_valid_mask;
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u16 sch; /* subchannel */
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u8 chpid[8]; /* chpids 0-7 */
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u16 fla[8]; /* full link addresses 0-7 */
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} __attribute__ ((packed));
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int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
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{
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unsigned long page;
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struct chsc_ssd_area *ssd_area;
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int ccode;
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int ret;
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int i;
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int mask;
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page = get_zeroed_page(GFP_KERNEL | GFP_DMA);
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if (!page)
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return -ENOMEM;
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ssd_area = (struct chsc_ssd_area *) page;
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ssd_area->request.length = 0x0010;
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ssd_area->request.code = 0x0004;
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ssd_area->ssid = schid.ssid;
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ssd_area->f_sch = schid.sch_no;
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ssd_area->l_sch = schid.sch_no;
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ccode = chsc(ssd_area);
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/* Check response. */
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if (ccode > 0) {
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ret = (ccode == 3) ? -ENODEV : -EBUSY;
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goto out_free;
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}
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ret = chsc_error_from_response(ssd_area->response.code);
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if (ret != 0) {
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CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n",
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schid.ssid, schid.sch_no,
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ssd_area->response.code);
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goto out_free;
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}
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if (!ssd_area->sch_valid) {
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ret = -ENODEV;
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goto out_free;
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}
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/* Copy data */
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ret = 0;
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memset(ssd, 0, sizeof(struct chsc_ssd_info));
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if ((ssd_area->st != SUBCHANNEL_TYPE_IO) &&
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(ssd_area->st != SUBCHANNEL_TYPE_MSG))
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goto out_free;
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ssd->path_mask = ssd_area->path_mask;
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ssd->fla_valid_mask = ssd_area->fla_valid_mask;
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for (i = 0; i < 8; i++) {
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mask = 0x80 >> i;
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if (ssd_area->path_mask & mask) {
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chp_id_init(&ssd->chpid[i]);
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ssd->chpid[i].id = ssd_area->chpid[i];
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}
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if (ssd_area->fla_valid_mask & mask)
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ssd->fla[i] = ssd_area->fla[i];
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}
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out_free:
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free_page(page);
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return ret;
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}
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static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data)
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{
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spin_lock_irq(sch->lock);
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if (sch->driver && sch->driver->chp_event)
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if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0)
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goto out_unreg;
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spin_unlock_irq(sch->lock);
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return 0;
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out_unreg:
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sch->lpm = 0;
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spin_unlock_irq(sch->lock);
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css_schedule_eval(sch->schid);
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return 0;
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}
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void chsc_chp_offline(struct chp_id chpid)
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{
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char dbf_txt[15];
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struct chp_link link;
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sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id);
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CIO_TRACE_EVENT(2, dbf_txt);
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if (chp_get_status(chpid) <= 0)
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return;
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memset(&link, 0, sizeof(struct chp_link));
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link.chpid = chpid;
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/* Wait until previous actions have settled. */
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css_wait_for_slow_path();
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for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link);
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}
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static int s390_process_res_acc_new_sch(struct subchannel_id schid, void *data)
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{
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struct schib schib;
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/*
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* We don't know the device yet, but since a path
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* may be available now to the device we'll have
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* to do recognition again.
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* Since we don't have any idea about which chpid
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* that beast may be on we'll have to do a stsch
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* on all devices, grr...
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*/
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if (stsch_err(schid, &schib))
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/* We're through */
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return -ENXIO;
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/* Put it on the slow path. */
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css_schedule_eval(schid);
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return 0;
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}
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static int __s390_process_res_acc(struct subchannel *sch, void *data)
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{
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spin_lock_irq(sch->lock);
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if (sch->driver && sch->driver->chp_event)
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sch->driver->chp_event(sch, data, CHP_ONLINE);
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spin_unlock_irq(sch->lock);
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return 0;
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}
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static void s390_process_res_acc(struct chp_link *link)
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{
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char dbf_txt[15];
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sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid,
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link->chpid.id);
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CIO_TRACE_EVENT( 2, dbf_txt);
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if (link->fla != 0) {
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sprintf(dbf_txt, "fla%x", link->fla);
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CIO_TRACE_EVENT( 2, dbf_txt);
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}
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/* Wait until previous actions have settled. */
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css_wait_for_slow_path();
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/*
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* I/O resources may have become accessible.
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* Scan through all subchannels that may be concerned and
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* do a validation on those.
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* The more information we have (info), the less scanning
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* will we have to do.
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*/
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for_each_subchannel_staged(__s390_process_res_acc,
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s390_process_res_acc_new_sch, link);
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}
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static int
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__get_chpid_from_lir(void *data)
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{
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struct lir {
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u8 iq;
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u8 ic;
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u16 sci;
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/* incident-node descriptor */
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u32 indesc[28];
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/* attached-node descriptor */
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u32 andesc[28];
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/* incident-specific information */
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u32 isinfo[28];
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} __attribute__ ((packed)) *lir;
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lir = data;
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if (!(lir->iq&0x80))
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/* NULL link incident record */
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return -EINVAL;
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if (!(lir->indesc[0]&0xc0000000))
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/* node descriptor not valid */
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return -EINVAL;
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if (!(lir->indesc[0]&0x10000000))
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/* don't handle device-type nodes - FIXME */
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return -EINVAL;
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/* Byte 3 contains the chpid. Could also be CTCA, but we don't care */
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return (u16) (lir->indesc[0]&0x000000ff);
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}
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struct chsc_sei_area {
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struct chsc_header request;
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u32 reserved1;
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u32 reserved2;
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u32 reserved3;
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struct chsc_header response;
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u32 reserved4;
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u8 flags;
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u8 vf; /* validity flags */
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u8 rs; /* reporting source */
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u8 cc; /* content code */
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u16 fla; /* full link address */
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u16 rsid; /* reporting source id */
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u32 reserved5;
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u32 reserved6;
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u8 ccdf[4096 - 16 - 24]; /* content-code dependent field */
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/* ccdf has to be big enough for a link-incident record */
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} __attribute__ ((packed));
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static void chsc_process_sei_link_incident(struct chsc_sei_area *sei_area)
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{
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struct chp_id chpid;
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int id;
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CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n",
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sei_area->rs, sei_area->rsid);
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if (sei_area->rs != 4)
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return;
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id = __get_chpid_from_lir(sei_area->ccdf);
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if (id < 0)
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CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n");
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else {
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chp_id_init(&chpid);
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chpid.id = id;
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chsc_chp_offline(chpid);
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}
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}
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static void chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
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{
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struct chp_link link;
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struct chp_id chpid;
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int status;
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CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, "
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"rs_id=%04x)\n", sei_area->rs, sei_area->rsid);
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if (sei_area->rs != 4)
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return;
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chp_id_init(&chpid);
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chpid.id = sei_area->rsid;
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/* allocate a new channel path structure, if needed */
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status = chp_get_status(chpid);
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if (status < 0)
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chp_new(chpid);
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else if (!status)
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return;
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memset(&link, 0, sizeof(struct chp_link));
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link.chpid = chpid;
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if ((sei_area->vf & 0xc0) != 0) {
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link.fla = sei_area->fla;
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if ((sei_area->vf & 0xc0) == 0xc0)
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/* full link address */
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link.fla_mask = 0xffff;
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else
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/* link address */
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link.fla_mask = 0xff00;
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}
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s390_process_res_acc(&link);
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}
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struct chp_config_data {
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u8 map[32];
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u8 op;
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u8 pc;
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};
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static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area)
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{
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struct chp_config_data *data;
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struct chp_id chpid;
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int num;
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CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
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if (sei_area->rs != 0)
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return;
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data = (struct chp_config_data *) &(sei_area->ccdf);
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chp_id_init(&chpid);
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for (num = 0; num <= __MAX_CHPID; num++) {
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if (!chp_test_bit(data->map, num))
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continue;
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chpid.id = num;
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printk(KERN_WARNING "cio: processing configure event %d for "
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"chpid %x.%02x\n", data->op, chpid.cssid, chpid.id);
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switch (data->op) {
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case 0:
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chp_cfg_schedule(chpid, 1);
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break;
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case 1:
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chp_cfg_schedule(chpid, 0);
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break;
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case 2:
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chp_cfg_cancel_deconfigure(chpid);
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break;
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}
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}
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}
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static void chsc_process_sei(struct chsc_sei_area *sei_area)
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{
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/* Check if we might have lost some information. */
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if (sei_area->flags & 0x40) {
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CIO_CRW_EVENT(2, "chsc: event overflow\n");
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css_schedule_eval_all();
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}
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/* which kind of information was stored? */
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switch (sei_area->cc) {
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case 1: /* link incident*/
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chsc_process_sei_link_incident(sei_area);
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break;
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case 2: /* i/o resource accessibiliy */
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chsc_process_sei_res_acc(sei_area);
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break;
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case 8: /* channel-path-configuration notification */
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chsc_process_sei_chp_config(sei_area);
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break;
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default: /* other stuff */
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CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n",
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sei_area->cc);
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break;
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}
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}
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static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
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{
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struct chsc_sei_area *sei_area;
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if (overflow) {
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css_schedule_eval_all();
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return;
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}
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CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
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"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
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crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
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crw0->erc, crw0->rsid);
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if (!sei_page)
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return;
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/* Access to sei_page is serialized through machine check handler
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* thread, so no need for locking. */
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sei_area = sei_page;
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CIO_TRACE_EVENT(2, "prcss");
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do {
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memset(sei_area, 0, sizeof(*sei_area));
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sei_area->request.length = 0x0010;
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sei_area->request.code = 0x000e;
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if (chsc(sei_area))
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break;
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if (sei_area->response.code == 0x0001) {
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CIO_CRW_EVENT(4, "chsc: sei successful\n");
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chsc_process_sei(sei_area);
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} else {
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CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n",
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sei_area->response.code);
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break;
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}
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} while (sei_area->flags & 0x80);
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}
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void chsc_chp_online(struct chp_id chpid)
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{
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char dbf_txt[15];
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struct chp_link link;
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sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
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CIO_TRACE_EVENT(2, dbf_txt);
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if (chp_get_status(chpid) != 0) {
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memset(&link, 0, sizeof(struct chp_link));
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link.chpid = chpid;
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/* Wait until previous actions have settled. */
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css_wait_for_slow_path();
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for_each_subchannel_staged(__s390_process_res_acc, NULL,
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&link);
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}
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}
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static void __s390_subchannel_vary_chpid(struct subchannel *sch,
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struct chp_id chpid, int on)
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{
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unsigned long flags;
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struct chp_link link;
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memset(&link, 0, sizeof(struct chp_link));
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link.chpid = chpid;
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spin_lock_irqsave(sch->lock, flags);
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if (sch->driver && sch->driver->chp_event)
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sch->driver->chp_event(sch, &link,
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on ? CHP_VARY_ON : CHP_VARY_OFF);
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spin_unlock_irqrestore(sch->lock, flags);
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}
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static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data)
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{
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struct chp_id *chpid = data;
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__s390_subchannel_vary_chpid(sch, *chpid, 0);
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return 0;
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}
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static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data)
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{
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struct chp_id *chpid = data;
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__s390_subchannel_vary_chpid(sch, *chpid, 1);
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return 0;
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}
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static int
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__s390_vary_chpid_on(struct subchannel_id schid, void *data)
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{
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struct schib schib;
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if (stsch_err(schid, &schib))
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/* We're through */
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return -ENXIO;
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/* Put it on the slow path. */
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css_schedule_eval(schid);
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return 0;
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}
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/**
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* chsc_chp_vary - propagate channel-path vary operation to subchannels
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* @chpid: channl-path ID
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* @on: non-zero for vary online, zero for vary offline
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*/
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int chsc_chp_vary(struct chp_id chpid, int on)
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{
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struct chp_link link;
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memset(&link, 0, sizeof(struct chp_link));
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link.chpid = chpid;
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/* Wait until previous actions have settled. */
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css_wait_for_slow_path();
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/*
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* Redo PathVerification on the devices the chpid connects to
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*/
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if (on)
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for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
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__s390_vary_chpid_on, &link);
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else
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for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
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NULL, &link);
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return 0;
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}
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static void
|
|
chsc_remove_cmg_attr(struct channel_subsystem *css)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i <= __MAX_CHPID; i++) {
|
|
if (!css->chps[i])
|
|
continue;
|
|
chp_remove_cmg_attr(css->chps[i]);
|
|
}
|
|
}
|
|
|
|
static int
|
|
chsc_add_cmg_attr(struct channel_subsystem *css)
|
|
{
|
|
int i, ret;
|
|
|
|
ret = 0;
|
|
for (i = 0; i <= __MAX_CHPID; i++) {
|
|
if (!css->chps[i])
|
|
continue;
|
|
ret = chp_add_cmg_attr(css->chps[i]);
|
|
if (ret)
|
|
goto cleanup;
|
|
}
|
|
return ret;
|
|
cleanup:
|
|
for (--i; i >= 0; i--) {
|
|
if (!css->chps[i])
|
|
continue;
|
|
chp_remove_cmg_attr(css->chps[i]);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
__chsc_do_secm(struct channel_subsystem *css, int enable, void *page)
|
|
{
|
|
struct {
|
|
struct chsc_header request;
|
|
u32 operation_code : 2;
|
|
u32 : 30;
|
|
u32 key : 4;
|
|
u32 : 28;
|
|
u32 zeroes1;
|
|
u32 cub_addr1;
|
|
u32 zeroes2;
|
|
u32 cub_addr2;
|
|
u32 reserved[13];
|
|
struct chsc_header response;
|
|
u32 status : 8;
|
|
u32 : 4;
|
|
u32 fmt : 4;
|
|
u32 : 16;
|
|
} __attribute__ ((packed)) *secm_area;
|
|
int ret, ccode;
|
|
|
|
secm_area = page;
|
|
secm_area->request.length = 0x0050;
|
|
secm_area->request.code = 0x0016;
|
|
|
|
secm_area->key = PAGE_DEFAULT_KEY;
|
|
secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1;
|
|
secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2;
|
|
|
|
secm_area->operation_code = enable ? 0 : 1;
|
|
|
|
ccode = chsc(secm_area);
|
|
if (ccode > 0)
|
|
return (ccode == 3) ? -ENODEV : -EBUSY;
|
|
|
|
switch (secm_area->response.code) {
|
|
case 0x0102:
|
|
case 0x0103:
|
|
ret = -EINVAL;
|
|
default:
|
|
ret = chsc_error_from_response(secm_area->response.code);
|
|
}
|
|
if (ret != 0)
|
|
CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n",
|
|
secm_area->response.code);
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
chsc_secm(struct channel_subsystem *css, int enable)
|
|
{
|
|
void *secm_area;
|
|
int ret;
|
|
|
|
secm_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
|
|
if (!secm_area)
|
|
return -ENOMEM;
|
|
|
|
if (enable && !css->cm_enabled) {
|
|
css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
|
|
css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
|
|
if (!css->cub_addr1 || !css->cub_addr2) {
|
|
free_page((unsigned long)css->cub_addr1);
|
|
free_page((unsigned long)css->cub_addr2);
|
|
free_page((unsigned long)secm_area);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
ret = __chsc_do_secm(css, enable, secm_area);
|
|
if (!ret) {
|
|
css->cm_enabled = enable;
|
|
if (css->cm_enabled) {
|
|
ret = chsc_add_cmg_attr(css);
|
|
if (ret) {
|
|
memset(secm_area, 0, PAGE_SIZE);
|
|
__chsc_do_secm(css, 0, secm_area);
|
|
css->cm_enabled = 0;
|
|
}
|
|
} else
|
|
chsc_remove_cmg_attr(css);
|
|
}
|
|
if (!css->cm_enabled) {
|
|
free_page((unsigned long)css->cub_addr1);
|
|
free_page((unsigned long)css->cub_addr2);
|
|
}
|
|
free_page((unsigned long)secm_area);
|
|
return ret;
|
|
}
|
|
|
|
int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
|
|
int c, int m,
|
|
struct chsc_response_struct *resp)
|
|
{
|
|
int ccode, ret;
|
|
|
|
struct {
|
|
struct chsc_header request;
|
|
u32 : 2;
|
|
u32 m : 1;
|
|
u32 c : 1;
|
|
u32 fmt : 4;
|
|
u32 cssid : 8;
|
|
u32 : 4;
|
|
u32 rfmt : 4;
|
|
u32 first_chpid : 8;
|
|
u32 : 24;
|
|
u32 last_chpid : 8;
|
|
u32 zeroes1;
|
|
struct chsc_header response;
|
|
u8 data[PAGE_SIZE - 20];
|
|
} __attribute__ ((packed)) *scpd_area;
|
|
|
|
if ((rfmt == 1) && !css_general_characteristics.fcs)
|
|
return -EINVAL;
|
|
if ((rfmt == 2) && !css_general_characteristics.cib)
|
|
return -EINVAL;
|
|
scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
|
|
if (!scpd_area)
|
|
return -ENOMEM;
|
|
|
|
scpd_area->request.length = 0x0010;
|
|
scpd_area->request.code = 0x0002;
|
|
|
|
scpd_area->cssid = chpid.cssid;
|
|
scpd_area->first_chpid = chpid.id;
|
|
scpd_area->last_chpid = chpid.id;
|
|
scpd_area->m = m;
|
|
scpd_area->c = c;
|
|
scpd_area->fmt = fmt;
|
|
scpd_area->rfmt = rfmt;
|
|
|
|
ccode = chsc(scpd_area);
|
|
if (ccode > 0) {
|
|
ret = (ccode == 3) ? -ENODEV : -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
ret = chsc_error_from_response(scpd_area->response.code);
|
|
if (ret == 0)
|
|
/* Success. */
|
|
memcpy(resp, &scpd_area->response, scpd_area->response.length);
|
|
else
|
|
CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
|
|
scpd_area->response.code);
|
|
out:
|
|
free_page((unsigned long)scpd_area);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc);
|
|
|
|
int chsc_determine_base_channel_path_desc(struct chp_id chpid,
|
|
struct channel_path_desc *desc)
|
|
{
|
|
struct chsc_response_struct *chsc_resp;
|
|
int ret;
|
|
|
|
chsc_resp = kzalloc(sizeof(*chsc_resp), GFP_KERNEL);
|
|
if (!chsc_resp)
|
|
return -ENOMEM;
|
|
ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, chsc_resp);
|
|
if (ret)
|
|
goto out_free;
|
|
memcpy(desc, &chsc_resp->data, chsc_resp->length);
|
|
out_free:
|
|
kfree(chsc_resp);
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
|
|
struct cmg_chars *chars)
|
|
{
|
|
switch (chp->cmg) {
|
|
case 2:
|
|
case 3:
|
|
chp->cmg_chars = kmalloc(sizeof(struct cmg_chars),
|
|
GFP_KERNEL);
|
|
if (chp->cmg_chars) {
|
|
int i, mask;
|
|
struct cmg_chars *cmg_chars;
|
|
|
|
cmg_chars = chp->cmg_chars;
|
|
for (i = 0; i < NR_MEASUREMENT_CHARS; i++) {
|
|
mask = 0x80 >> (i + 3);
|
|
if (cmcv & mask)
|
|
cmg_chars->values[i] = chars->values[i];
|
|
else
|
|
cmg_chars->values[i] = 0;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
/* No cmg-dependent data. */
|
|
break;
|
|
}
|
|
}
|
|
|
|
int chsc_get_channel_measurement_chars(struct channel_path *chp)
|
|
{
|
|
int ccode, ret;
|
|
|
|
struct {
|
|
struct chsc_header request;
|
|
u32 : 24;
|
|
u32 first_chpid : 8;
|
|
u32 : 24;
|
|
u32 last_chpid : 8;
|
|
u32 zeroes1;
|
|
struct chsc_header response;
|
|
u32 zeroes2;
|
|
u32 not_valid : 1;
|
|
u32 shared : 1;
|
|
u32 : 22;
|
|
u32 chpid : 8;
|
|
u32 cmcv : 5;
|
|
u32 : 11;
|
|
u32 cmgq : 8;
|
|
u32 cmg : 8;
|
|
u32 zeroes3;
|
|
u32 data[NR_MEASUREMENT_CHARS];
|
|
} __attribute__ ((packed)) *scmc_area;
|
|
|
|
scmc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
|
|
if (!scmc_area)
|
|
return -ENOMEM;
|
|
|
|
scmc_area->request.length = 0x0010;
|
|
scmc_area->request.code = 0x0022;
|
|
|
|
scmc_area->first_chpid = chp->chpid.id;
|
|
scmc_area->last_chpid = chp->chpid.id;
|
|
|
|
ccode = chsc(scmc_area);
|
|
if (ccode > 0) {
|
|
ret = (ccode == 3) ? -ENODEV : -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
ret = chsc_error_from_response(scmc_area->response.code);
|
|
if (ret == 0) {
|
|
/* Success. */
|
|
if (!scmc_area->not_valid) {
|
|
chp->cmg = scmc_area->cmg;
|
|
chp->shared = scmc_area->shared;
|
|
chsc_initialize_cmg_chars(chp, scmc_area->cmcv,
|
|
(struct cmg_chars *)
|
|
&scmc_area->data);
|
|
} else {
|
|
chp->cmg = -1;
|
|
chp->shared = -1;
|
|
}
|
|
} else {
|
|
CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n",
|
|
scmc_area->response.code);
|
|
}
|
|
out:
|
|
free_page((unsigned long)scmc_area);
|
|
return ret;
|
|
}
|
|
|
|
int __init chsc_alloc_sei_area(void)
|
|
{
|
|
int ret;
|
|
|
|
sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
|
|
if (!sei_page) {
|
|
CIO_MSG_EVENT(0, "Can't allocate page for processing of "
|
|
"chsc machine checks!\n");
|
|
return -ENOMEM;
|
|
}
|
|
ret = s390_register_crw_handler(CRW_RSC_CSS, chsc_process_crw);
|
|
if (ret)
|
|
kfree(sei_page);
|
|
return ret;
|
|
}
|
|
|
|
void __init chsc_free_sei_area(void)
|
|
{
|
|
s390_unregister_crw_handler(CRW_RSC_CSS);
|
|
kfree(sei_page);
|
|
}
|
|
|
|
int __init
|
|
chsc_enable_facility(int operation_code)
|
|
{
|
|
int ret;
|
|
struct {
|
|
struct chsc_header request;
|
|
u8 reserved1:4;
|
|
u8 format:4;
|
|
u8 reserved2;
|
|
u16 operation_code;
|
|
u32 reserved3;
|
|
u32 reserved4;
|
|
u32 operation_data_area[252];
|
|
struct chsc_header response;
|
|
u32 reserved5:4;
|
|
u32 format2:4;
|
|
u32 reserved6:24;
|
|
} __attribute__ ((packed)) *sda_area;
|
|
|
|
sda_area = (void *)get_zeroed_page(GFP_KERNEL|GFP_DMA);
|
|
if (!sda_area)
|
|
return -ENOMEM;
|
|
sda_area->request.length = 0x0400;
|
|
sda_area->request.code = 0x0031;
|
|
sda_area->operation_code = operation_code;
|
|
|
|
ret = chsc(sda_area);
|
|
if (ret > 0) {
|
|
ret = (ret == 3) ? -ENODEV : -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
switch (sda_area->response.code) {
|
|
case 0x0101:
|
|
ret = -EOPNOTSUPP;
|
|
break;
|
|
default:
|
|
ret = chsc_error_from_response(sda_area->response.code);
|
|
}
|
|
if (ret != 0)
|
|
CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
|
|
operation_code, sda_area->response.code);
|
|
out:
|
|
free_page((unsigned long)sda_area);
|
|
return ret;
|
|
}
|
|
|
|
struct css_general_char css_general_characteristics;
|
|
struct css_chsc_char css_chsc_characteristics;
|
|
|
|
int __init
|
|
chsc_determine_css_characteristics(void)
|
|
{
|
|
int result;
|
|
struct {
|
|
struct chsc_header request;
|
|
u32 reserved1;
|
|
u32 reserved2;
|
|
u32 reserved3;
|
|
struct chsc_header response;
|
|
u32 reserved4;
|
|
u32 general_char[510];
|
|
u32 chsc_char[518];
|
|
} __attribute__ ((packed)) *scsc_area;
|
|
|
|
scsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
|
|
if (!scsc_area)
|
|
return -ENOMEM;
|
|
|
|
scsc_area->request.length = 0x0010;
|
|
scsc_area->request.code = 0x0010;
|
|
|
|
result = chsc(scsc_area);
|
|
if (result) {
|
|
result = (result == 3) ? -ENODEV : -EBUSY;
|
|
goto exit;
|
|
}
|
|
|
|
result = chsc_error_from_response(scsc_area->response.code);
|
|
if (result == 0) {
|
|
memcpy(&css_general_characteristics, scsc_area->general_char,
|
|
sizeof(css_general_characteristics));
|
|
memcpy(&css_chsc_characteristics, scsc_area->chsc_char,
|
|
sizeof(css_chsc_characteristics));
|
|
} else
|
|
CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n",
|
|
scsc_area->response.code);
|
|
exit:
|
|
free_page ((unsigned long) scsc_area);
|
|
return result;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(css_general_characteristics);
|
|
EXPORT_SYMBOL_GPL(css_chsc_characteristics);
|
|
|
|
int chsc_sstpc(void *page, unsigned int op, u16 ctrl)
|
|
{
|
|
struct {
|
|
struct chsc_header request;
|
|
unsigned int rsvd0;
|
|
unsigned int op : 8;
|
|
unsigned int rsvd1 : 8;
|
|
unsigned int ctrl : 16;
|
|
unsigned int rsvd2[5];
|
|
struct chsc_header response;
|
|
unsigned int rsvd3[7];
|
|
} __attribute__ ((packed)) *rr;
|
|
int rc;
|
|
|
|
memset(page, 0, PAGE_SIZE);
|
|
rr = page;
|
|
rr->request.length = 0x0020;
|
|
rr->request.code = 0x0033;
|
|
rr->op = op;
|
|
rr->ctrl = ctrl;
|
|
rc = chsc(rr);
|
|
if (rc)
|
|
return -EIO;
|
|
rc = (rr->response.code == 0x0001) ? 0 : -EIO;
|
|
return rc;
|
|
}
|
|
|
|
int chsc_sstpi(void *page, void *result, size_t size)
|
|
{
|
|
struct {
|
|
struct chsc_header request;
|
|
unsigned int rsvd0[3];
|
|
struct chsc_header response;
|
|
char data[size];
|
|
} __attribute__ ((packed)) *rr;
|
|
int rc;
|
|
|
|
memset(page, 0, PAGE_SIZE);
|
|
rr = page;
|
|
rr->request.length = 0x0010;
|
|
rr->request.code = 0x0038;
|
|
rc = chsc(rr);
|
|
if (rc)
|
|
return -EIO;
|
|
memcpy(result, &rr->data, size);
|
|
return (rr->response.code == 0x0001) ? 0 : -EIO;
|
|
}
|
|
|