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991a211aa9
strncpy() is deprecated for use on NUL-terminated destination strings [1] and as such we should prefer more robust and less ambiguous string interfaces. We expect both `params` and `id` to be NUL-terminated based on their usage with format strings: format_node_data(iuparams, iunodeid, &lir->incident_node); format_node_data(auparams, aunodeid, &lir->attached_node); switch (lir->iq.class) { case LIR_IQ_CLASS_DEGRADED: pr_warn("Link degraded: RS=%02x RSID=%04x IC=%02x " "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n", sei_area->rs, sei_area->rsid, lir->ic, iuparams, iunodeid, auparams, aunodeid); NUL-padding is not required as both `params` and `id` have been memset to 0: memset(params, 0, PARAMS_LEN); memset(id, 0, NODEID_LEN); Considering the above, a suitable replacement is `strscpy` [2] due to the fact that it guarantees NUL-termination on the destination buffer without unnecessarily NUL-padding. Note that there's no overread bugs in the current implementation as the string literal "n/a" has a size much smaller than PARAMS_LEN or NODEID_LEN. Nonetheless, let's favor strscpy(). Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1] Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2] Link: https://github.com/KSPP/linux/issues/90 Cc: linux-hardening@vger.kernel.org Signed-off-by: Justin Stitt <justinstitt@google.com> Reviewed-by: Vineeth Vijayan <vneethv@linux.ibm.com> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20231023-strncpy-drivers-s390-cio-chsc-c-v1-1-8b76a7b83260@google.com Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
1556 lines
36 KiB
C
1556 lines
36 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* S/390 common I/O routines -- channel subsystem call
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*
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* Copyright IBM Corp. 1999,2012
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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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#define KMSG_COMPONENT "cio"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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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 <linux/mutex.h>
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#include <linux/pci.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 <asm/crw.h>
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#include <asm/isc.h>
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#include <asm/ebcdic.h>
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#include <asm/ap.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 void *chsc_page;
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static DEFINE_SPINLOCK(chsc_page_lock);
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#define SEI_VF_FLA 0xc0 /* VF flag for Full Link Address */
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#define SEI_RS_CHPID 0x4 /* 4 in RS field indicates CHPID */
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/**
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* chsc_error_from_response() - convert a chsc response to an error
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* @response: chsc response code
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*
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* Returns an appropriate Linux error code for @response.
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*/
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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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case 0x0104:
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return -EINVAL;
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case 0x0004:
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case 0x0106: /* "Wrong Channel Parm" for the op 0x003d */
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return -EOPNOTSUPP;
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case 0x000b:
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case 0x0107: /* "Channel busy" for the op 0x003d */
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return -EBUSY;
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case 0x0100:
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case 0x0102:
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return -ENOMEM;
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case 0x0108: /* "HW limit exceeded" for the op 0x003d */
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return -EUSERS;
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default:
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return -EIO;
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}
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}
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EXPORT_SYMBOL_GPL(chsc_error_from_response);
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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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} __packed __aligned(PAGE_SIZE);
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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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struct chsc_ssd_area *ssd_area;
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unsigned long flags;
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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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spin_lock_irqsave(&chsc_page_lock, flags);
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memset(chsc_page, 0, PAGE_SIZE);
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ssd_area = chsc_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;
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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;
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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;
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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;
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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:
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spin_unlock_irqrestore(&chsc_page_lock, flags);
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return ret;
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}
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/**
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* chsc_ssqd() - store subchannel QDIO data (SSQD)
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* @schid: id of the subchannel on which SSQD is performed
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* @ssqd: request and response block for SSQD
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*
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* Returns 0 on success.
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*/
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int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd)
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{
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memset(ssqd, 0, sizeof(*ssqd));
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ssqd->request.length = 0x0010;
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ssqd->request.code = 0x0024;
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ssqd->first_sch = schid.sch_no;
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ssqd->last_sch = schid.sch_no;
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ssqd->ssid = schid.ssid;
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if (chsc(ssqd))
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return -EIO;
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return chsc_error_from_response(ssqd->response.code);
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}
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EXPORT_SYMBOL_GPL(chsc_ssqd);
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/**
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* chsc_sadc() - set adapter device controls (SADC)
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* @schid: id of the subchannel on which SADC is performed
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* @scssc: request and response block for SADC
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* @summary_indicator_addr: summary indicator address
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* @subchannel_indicator_addr: subchannel indicator address
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* @isc: Interruption Subclass for this subchannel
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*
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* Returns 0 on success.
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*/
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int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
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u64 summary_indicator_addr, u64 subchannel_indicator_addr, u8 isc)
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{
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memset(scssc, 0, sizeof(*scssc));
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scssc->request.length = 0x0fe0;
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scssc->request.code = 0x0021;
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scssc->operation_code = 0;
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scssc->summary_indicator_addr = summary_indicator_addr;
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scssc->subchannel_indicator_addr = subchannel_indicator_addr;
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scssc->ks = PAGE_DEFAULT_KEY >> 4;
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scssc->kc = PAGE_DEFAULT_KEY >> 4;
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scssc->isc = isc;
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scssc->schid = schid;
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/* enable the time delay disablement facility */
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if (css_general_characteristics.aif_tdd)
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scssc->word_with_d_bit = 0x10000000;
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if (chsc(scssc))
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return -EIO;
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return chsc_error_from_response(scssc->response.code);
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}
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EXPORT_SYMBOL_GPL(chsc_sadc);
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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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struct channel_path *chp = chpid_to_chp(chpid);
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struct chp_link link;
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char dbf_txt[15];
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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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mutex_lock(&chp->lock);
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chp_update_desc(chp);
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mutex_unlock(&chp->lock);
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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(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, NULL, link);
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css_schedule_reprobe();
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}
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static int process_fces_event(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_FCES_EVENT);
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spin_unlock_irq(sch->lock);
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return 0;
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}
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struct chsc_sei_nt0_area {
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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 reserved1;
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u32 reserved2;
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/* ccdf has to be big enough for a link-incident record */
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u8 ccdf[PAGE_SIZE - 24 - 16]; /* content-code dependent field */
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} __packed;
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struct chsc_sei_nt2_area {
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u8 flags; /* p and v bit */
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u8 reserved1;
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u8 reserved2;
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u8 cc; /* content code */
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u32 reserved3[13];
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u8 ccdf[PAGE_SIZE - 24 - 56]; /* content-code dependent field */
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} __packed;
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#define CHSC_SEI_NT0 (1ULL << 63)
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#define CHSC_SEI_NT2 (1ULL << 61)
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struct chsc_sei {
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struct chsc_header request;
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u32 reserved1;
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u64 ntsm; /* notification type mask */
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struct chsc_header response;
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u32 :24;
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u8 nt;
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union {
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struct chsc_sei_nt0_area nt0_area;
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struct chsc_sei_nt2_area nt2_area;
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u8 nt_area[PAGE_SIZE - 24];
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} u;
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} __packed __aligned(PAGE_SIZE);
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/*
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* Link Incident Record as defined in SA22-7202, "ESCON I/O Interface"
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*/
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#define LIR_IQ_CLASS_INFO 0
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#define LIR_IQ_CLASS_DEGRADED 1
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#define LIR_IQ_CLASS_NOT_OPERATIONAL 2
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struct lir {
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struct {
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u32 null:1;
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u32 reserved:3;
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u32 class:2;
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u32 reserved2:2;
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} __packed iq;
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u32 ic:8;
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u32 reserved:16;
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struct node_descriptor incident_node;
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struct node_descriptor attached_node;
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u8 reserved2[32];
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} __packed;
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#define PARAMS_LEN 10 /* PARAMS=xx,xxxxxx */
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#define NODEID_LEN 35 /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */
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/* Copy EBCIDC text, convert to ASCII and optionally add delimiter. */
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static char *store_ebcdic(char *dest, const char *src, unsigned long len,
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char delim)
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{
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memcpy(dest, src, len);
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EBCASC(dest, len);
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if (delim)
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dest[len++] = delim;
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return dest + len;
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}
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static void chsc_link_from_sei(struct chp_link *link,
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struct chsc_sei_nt0_area *sei_area)
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{
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if ((sei_area->vf & SEI_VF_FLA) != 0) {
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link->fla = sei_area->fla;
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link->fla_mask = ((sei_area->vf & SEI_VF_FLA) == SEI_VF_FLA) ?
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0xffff : 0xff00;
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}
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}
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/* Format node ID and parameters for output in LIR log message. */
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static void format_node_data(char *params, char *id, struct node_descriptor *nd)
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{
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memset(params, 0, PARAMS_LEN);
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memset(id, 0, NODEID_LEN);
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if (nd->validity != ND_VALIDITY_VALID) {
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strscpy(params, "n/a", PARAMS_LEN);
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strscpy(id, "n/a", NODEID_LEN);
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return;
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}
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/* PARAMS=xx,xxxxxx */
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snprintf(params, PARAMS_LEN, "%02x,%06x", nd->byte0, nd->params);
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/* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */
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id = store_ebcdic(id, nd->type, sizeof(nd->type), '/');
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id = store_ebcdic(id, nd->model, sizeof(nd->model), ',');
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id = store_ebcdic(id, nd->manufacturer, sizeof(nd->manufacturer), '.');
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id = store_ebcdic(id, nd->plant, sizeof(nd->plant), 0);
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id = store_ebcdic(id, nd->seq, sizeof(nd->seq), ',');
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sprintf(id, "%04X", nd->tag);
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}
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static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area)
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{
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struct lir *lir = (struct lir *) &sei_area->ccdf;
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char iuparams[PARAMS_LEN], iunodeid[NODEID_LEN], auparams[PARAMS_LEN],
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aunodeid[NODEID_LEN];
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CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x, iq=%02x)\n",
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sei_area->rs, sei_area->rsid, sei_area->ccdf[0]);
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/* Ignore NULL Link Incident Records. */
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if (lir->iq.null)
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return;
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/* Inform user that a link requires maintenance actions because it has
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* become degraded or not operational. Note that this log message is
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* the primary intention behind a Link Incident Record. */
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format_node_data(iuparams, iunodeid, &lir->incident_node);
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format_node_data(auparams, aunodeid, &lir->attached_node);
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switch (lir->iq.class) {
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case LIR_IQ_CLASS_DEGRADED:
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pr_warn("Link degraded: RS=%02x RSID=%04x IC=%02x "
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"IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n",
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sei_area->rs, sei_area->rsid, lir->ic, iuparams,
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iunodeid, auparams, aunodeid);
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break;
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case LIR_IQ_CLASS_NOT_OPERATIONAL:
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pr_err("Link stopped: RS=%02x RSID=%04x IC=%02x "
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"IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n",
|
|
sei_area->rs, sei_area->rsid, lir->ic, iuparams,
|
|
iunodeid, auparams, aunodeid);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area)
|
|
{
|
|
struct channel_path *chp;
|
|
struct chp_link link;
|
|
struct chp_id chpid;
|
|
int status;
|
|
|
|
CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, "
|
|
"rs_id=%04x)\n", sei_area->rs, sei_area->rsid);
|
|
if (sei_area->rs != 4)
|
|
return;
|
|
chp_id_init(&chpid);
|
|
chpid.id = sei_area->rsid;
|
|
/* allocate a new channel path structure, if needed */
|
|
status = chp_get_status(chpid);
|
|
if (!status)
|
|
return;
|
|
|
|
if (status < 0) {
|
|
chp_new(chpid);
|
|
} else {
|
|
chp = chpid_to_chp(chpid);
|
|
mutex_lock(&chp->lock);
|
|
chp_update_desc(chp);
|
|
mutex_unlock(&chp->lock);
|
|
}
|
|
memset(&link, 0, sizeof(struct chp_link));
|
|
link.chpid = chpid;
|
|
chsc_link_from_sei(&link, sei_area);
|
|
s390_process_res_acc(&link);
|
|
}
|
|
|
|
static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area)
|
|
{
|
|
struct channel_path *chp;
|
|
struct chp_id chpid;
|
|
u8 *data;
|
|
int num;
|
|
|
|
CIO_CRW_EVENT(4, "chsc: channel path availability information\n");
|
|
if (sei_area->rs != 0)
|
|
return;
|
|
data = sei_area->ccdf;
|
|
chp_id_init(&chpid);
|
|
for (num = 0; num <= __MAX_CHPID; num++) {
|
|
if (!chp_test_bit(data, num))
|
|
continue;
|
|
chpid.id = num;
|
|
|
|
CIO_CRW_EVENT(4, "Update information for channel path "
|
|
"%x.%02x\n", chpid.cssid, chpid.id);
|
|
chp = chpid_to_chp(chpid);
|
|
if (!chp) {
|
|
chp_new(chpid);
|
|
continue;
|
|
}
|
|
mutex_lock(&chp->lock);
|
|
chp_update_desc(chp);
|
|
mutex_unlock(&chp->lock);
|
|
}
|
|
}
|
|
|
|
struct chp_config_data {
|
|
u8 map[32];
|
|
u8 op;
|
|
u8 pc;
|
|
};
|
|
|
|
static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area)
|
|
{
|
|
struct chp_config_data *data;
|
|
struct chp_id chpid;
|
|
int num;
|
|
char *events[3] = {"configure", "deconfigure", "cancel deconfigure"};
|
|
|
|
CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
|
|
if (sei_area->rs != 0)
|
|
return;
|
|
data = (struct chp_config_data *) &(sei_area->ccdf);
|
|
chp_id_init(&chpid);
|
|
for (num = 0; num <= __MAX_CHPID; num++) {
|
|
if (!chp_test_bit(data->map, num))
|
|
continue;
|
|
chpid.id = num;
|
|
pr_notice("Processing %s for channel path %x.%02x\n",
|
|
events[data->op], chpid.cssid, chpid.id);
|
|
switch (data->op) {
|
|
case 0:
|
|
chp_cfg_schedule(chpid, 1);
|
|
break;
|
|
case 1:
|
|
chp_cfg_schedule(chpid, 0);
|
|
break;
|
|
case 2:
|
|
chp_cfg_cancel_deconfigure(chpid);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area)
|
|
{
|
|
int ret;
|
|
|
|
CIO_CRW_EVENT(4, "chsc: scm change notification\n");
|
|
if (sei_area->rs != 7)
|
|
return;
|
|
|
|
ret = scm_update_information();
|
|
if (ret)
|
|
CIO_CRW_EVENT(0, "chsc: updating change notification"
|
|
" failed (rc=%d).\n", ret);
|
|
}
|
|
|
|
static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area)
|
|
{
|
|
int ret;
|
|
|
|
CIO_CRW_EVENT(4, "chsc: scm available information\n");
|
|
if (sei_area->rs != 7)
|
|
return;
|
|
|
|
ret = scm_process_availability_information();
|
|
if (ret)
|
|
CIO_CRW_EVENT(0, "chsc: process availability information"
|
|
" failed (rc=%d).\n", ret);
|
|
}
|
|
|
|
static void chsc_process_sei_ap_cfg_chg(struct chsc_sei_nt0_area *sei_area)
|
|
{
|
|
CIO_CRW_EVENT(3, "chsc: ap config changed\n");
|
|
if (sei_area->rs != 5)
|
|
return;
|
|
|
|
ap_bus_cfg_chg();
|
|
}
|
|
|
|
static void chsc_process_sei_fces_event(struct chsc_sei_nt0_area *sei_area)
|
|
{
|
|
struct chp_link link;
|
|
struct chp_id chpid;
|
|
struct channel_path *chp;
|
|
|
|
CIO_CRW_EVENT(4,
|
|
"chsc: FCES status notification (rs=%02x, rs_id=%04x, FCES-status=%x)\n",
|
|
sei_area->rs, sei_area->rsid, sei_area->ccdf[0]);
|
|
|
|
if (sei_area->rs != SEI_RS_CHPID)
|
|
return;
|
|
chp_id_init(&chpid);
|
|
chpid.id = sei_area->rsid;
|
|
|
|
/* Ignore the event on unknown/invalid chp */
|
|
chp = chpid_to_chp(chpid);
|
|
if (!chp)
|
|
return;
|
|
|
|
memset(&link, 0, sizeof(struct chp_link));
|
|
link.chpid = chpid;
|
|
chsc_link_from_sei(&link, sei_area);
|
|
|
|
for_each_subchannel_staged(process_fces_event, NULL, &link);
|
|
}
|
|
|
|
static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area)
|
|
{
|
|
switch (sei_area->cc) {
|
|
case 1:
|
|
zpci_event_error(sei_area->ccdf);
|
|
break;
|
|
case 2:
|
|
zpci_event_availability(sei_area->ccdf);
|
|
break;
|
|
default:
|
|
CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n",
|
|
sei_area->cc);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area)
|
|
{
|
|
/* which kind of information was stored? */
|
|
switch (sei_area->cc) {
|
|
case 1: /* link incident*/
|
|
chsc_process_sei_link_incident(sei_area);
|
|
break;
|
|
case 2: /* i/o resource accessibility */
|
|
chsc_process_sei_res_acc(sei_area);
|
|
break;
|
|
case 3: /* ap config changed */
|
|
chsc_process_sei_ap_cfg_chg(sei_area);
|
|
break;
|
|
case 7: /* channel-path-availability information */
|
|
chsc_process_sei_chp_avail(sei_area);
|
|
break;
|
|
case 8: /* channel-path-configuration notification */
|
|
chsc_process_sei_chp_config(sei_area);
|
|
break;
|
|
case 12: /* scm change notification */
|
|
chsc_process_sei_scm_change(sei_area);
|
|
break;
|
|
case 14: /* scm available notification */
|
|
chsc_process_sei_scm_avail(sei_area);
|
|
break;
|
|
case 15: /* FCES event notification */
|
|
chsc_process_sei_fces_event(sei_area);
|
|
break;
|
|
default: /* other stuff */
|
|
CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n",
|
|
sei_area->cc);
|
|
break;
|
|
}
|
|
|
|
/* Check if we might have lost some information. */
|
|
if (sei_area->flags & 0x40) {
|
|
CIO_CRW_EVENT(2, "chsc: event overflow\n");
|
|
css_schedule_eval_all();
|
|
}
|
|
}
|
|
|
|
static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm)
|
|
{
|
|
static int ntsm_unsupported;
|
|
|
|
while (true) {
|
|
memset(sei, 0, sizeof(*sei));
|
|
sei->request.length = 0x0010;
|
|
sei->request.code = 0x000e;
|
|
if (!ntsm_unsupported)
|
|
sei->ntsm = ntsm;
|
|
|
|
if (chsc(sei))
|
|
break;
|
|
|
|
if (sei->response.code != 0x0001) {
|
|
CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x, ntsm=%llx)\n",
|
|
sei->response.code, sei->ntsm);
|
|
|
|
if (sei->response.code == 3 && sei->ntsm) {
|
|
/* Fallback for old firmware. */
|
|
ntsm_unsupported = 1;
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt);
|
|
switch (sei->nt) {
|
|
case 0:
|
|
chsc_process_sei_nt0(&sei->u.nt0_area);
|
|
break;
|
|
case 2:
|
|
chsc_process_sei_nt2(&sei->u.nt2_area);
|
|
break;
|
|
default:
|
|
CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt);
|
|
break;
|
|
}
|
|
|
|
if (!(sei->u.nt0_area.flags & 0x80))
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handle channel subsystem related CRWs.
|
|
* Use store event information to find out what's going on.
|
|
*
|
|
* Note: Access to sei_page is serialized through machine check handler
|
|
* thread, so no need for locking.
|
|
*/
|
|
static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
|
|
{
|
|
struct chsc_sei *sei = sei_page;
|
|
|
|
if (overflow) {
|
|
css_schedule_eval_all();
|
|
return;
|
|
}
|
|
CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
|
|
"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
|
|
crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
|
|
crw0->erc, crw0->rsid);
|
|
|
|
CIO_TRACE_EVENT(2, "prcss");
|
|
chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2);
|
|
}
|
|
|
|
void chsc_chp_online(struct chp_id chpid)
|
|
{
|
|
struct channel_path *chp = chpid_to_chp(chpid);
|
|
struct chp_link link;
|
|
char dbf_txt[15];
|
|
|
|
sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
|
|
CIO_TRACE_EVENT(2, dbf_txt);
|
|
|
|
if (chp_get_status(chpid) != 0) {
|
|
memset(&link, 0, sizeof(struct chp_link));
|
|
link.chpid = chpid;
|
|
/* Wait until previous actions have settled. */
|
|
css_wait_for_slow_path();
|
|
|
|
mutex_lock(&chp->lock);
|
|
chp_update_desc(chp);
|
|
mutex_unlock(&chp->lock);
|
|
|
|
for_each_subchannel_staged(__s390_process_res_acc, NULL,
|
|
&link);
|
|
css_schedule_reprobe();
|
|
}
|
|
}
|
|
|
|
static void __s390_subchannel_vary_chpid(struct subchannel *sch,
|
|
struct chp_id chpid, int on)
|
|
{
|
|
unsigned long flags;
|
|
struct chp_link link;
|
|
|
|
memset(&link, 0, sizeof(struct chp_link));
|
|
link.chpid = chpid;
|
|
spin_lock_irqsave(sch->lock, flags);
|
|
if (sch->driver && sch->driver->chp_event)
|
|
sch->driver->chp_event(sch, &link,
|
|
on ? CHP_VARY_ON : CHP_VARY_OFF);
|
|
spin_unlock_irqrestore(sch->lock, flags);
|
|
}
|
|
|
|
static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data)
|
|
{
|
|
struct chp_id *chpid = data;
|
|
|
|
__s390_subchannel_vary_chpid(sch, *chpid, 0);
|
|
return 0;
|
|
}
|
|
|
|
static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data)
|
|
{
|
|
struct chp_id *chpid = data;
|
|
|
|
__s390_subchannel_vary_chpid(sch, *chpid, 1);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* chsc_chp_vary - propagate channel-path vary operation to subchannels
|
|
* @chpid: channl-path ID
|
|
* @on: non-zero for vary online, zero for vary offline
|
|
*/
|
|
int chsc_chp_vary(struct chp_id chpid, int on)
|
|
{
|
|
struct channel_path *chp = chpid_to_chp(chpid);
|
|
|
|
/*
|
|
* Redo PathVerification on the devices the chpid connects to
|
|
*/
|
|
if (on) {
|
|
/* Try to update the channel path description. */
|
|
chp_update_desc(chp);
|
|
for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
|
|
NULL, &chpid);
|
|
css_schedule_reprobe();
|
|
} else
|
|
for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
|
|
NULL, &chpid);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
int __chsc_do_secm(struct channel_subsystem *css, int enable)
|
|
{
|
|
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;
|
|
} *secm_area;
|
|
unsigned long flags;
|
|
int ret, ccode;
|
|
|
|
spin_lock_irqsave(&chsc_page_lock, flags);
|
|
memset(chsc_page, 0, PAGE_SIZE);
|
|
secm_area = chsc_page;
|
|
secm_area->request.length = 0x0050;
|
|
secm_area->request.code = 0x0016;
|
|
|
|
secm_area->key = PAGE_DEFAULT_KEY >> 4;
|
|
secm_area->cub_addr1 = virt_to_phys(css->cub_addr1);
|
|
secm_area->cub_addr2 = virt_to_phys(css->cub_addr2);
|
|
|
|
secm_area->operation_code = enable ? 0 : 1;
|
|
|
|
ccode = chsc(secm_area);
|
|
if (ccode > 0) {
|
|
ret = (ccode == 3) ? -ENODEV : -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
switch (secm_area->response.code) {
|
|
case 0x0102:
|
|
case 0x0103:
|
|
ret = -EINVAL;
|
|
break;
|
|
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);
|
|
out:
|
|
spin_unlock_irqrestore(&chsc_page_lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
chsc_secm(struct channel_subsystem *css, int enable)
|
|
{
|
|
int ret;
|
|
|
|
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);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
ret = __chsc_do_secm(css, enable);
|
|
if (!ret) {
|
|
css->cm_enabled = enable;
|
|
if (css->cm_enabled) {
|
|
ret = chsc_add_cmg_attr(css);
|
|
if (ret) {
|
|
__chsc_do_secm(css, 0);
|
|
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);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
|
|
int c, int m, void *page)
|
|
{
|
|
struct chsc_scpd *scpd_area;
|
|
int ccode, ret;
|
|
|
|
if ((rfmt == 1 || rfmt == 0) && c == 1 &&
|
|
!css_general_characteristics.fcs)
|
|
return -EINVAL;
|
|
if ((rfmt == 2) && !css_general_characteristics.cib)
|
|
return -EINVAL;
|
|
if ((rfmt == 3) && !css_general_characteristics.util_str)
|
|
return -EINVAL;
|
|
|
|
memset(page, 0, PAGE_SIZE);
|
|
scpd_area = page;
|
|
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)
|
|
return (ccode == 3) ? -ENODEV : -EBUSY;
|
|
|
|
ret = chsc_error_from_response(scpd_area->response.code);
|
|
if (ret)
|
|
CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
|
|
scpd_area->response.code);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc);
|
|
|
|
#define chsc_det_chp_desc(FMT, c) \
|
|
int chsc_determine_fmt##FMT##_channel_path_desc( \
|
|
struct chp_id chpid, struct channel_path_desc_fmt##FMT *desc) \
|
|
{ \
|
|
struct chsc_scpd *scpd_area; \
|
|
unsigned long flags; \
|
|
int ret; \
|
|
\
|
|
spin_lock_irqsave(&chsc_page_lock, flags); \
|
|
scpd_area = chsc_page; \
|
|
ret = chsc_determine_channel_path_desc(chpid, 0, FMT, c, 0, \
|
|
scpd_area); \
|
|
if (ret) \
|
|
goto out; \
|
|
\
|
|
memcpy(desc, scpd_area->data, sizeof(*desc)); \
|
|
out: \
|
|
spin_unlock_irqrestore(&chsc_page_lock, flags); \
|
|
return ret; \
|
|
}
|
|
|
|
chsc_det_chp_desc(0, 0)
|
|
chsc_det_chp_desc(1, 1)
|
|
chsc_det_chp_desc(3, 0)
|
|
|
|
static void
|
|
chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
|
|
struct cmg_chars *chars)
|
|
{
|
|
int i, mask;
|
|
|
|
for (i = 0; i < NR_MEASUREMENT_CHARS; i++) {
|
|
mask = 0x80 >> (i + 3);
|
|
if (cmcv & mask)
|
|
chp->cmg_chars.values[i] = chars->values[i];
|
|
else
|
|
chp->cmg_chars.values[i] = 0;
|
|
}
|
|
}
|
|
|
|
int chsc_get_channel_measurement_chars(struct channel_path *chp)
|
|
{
|
|
unsigned long flags;
|
|
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];
|
|
} *scmc_area;
|
|
|
|
chp->shared = -1;
|
|
chp->cmg = -1;
|
|
|
|
if (!css_chsc_characteristics.scmc || !css_chsc_characteristics.secm)
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&chsc_page_lock, flags);
|
|
memset(chsc_page, 0, PAGE_SIZE);
|
|
scmc_area = chsc_page;
|
|
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) {
|
|
CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n",
|
|
scmc_area->response.code);
|
|
goto out;
|
|
}
|
|
if (scmc_area->not_valid)
|
|
goto out;
|
|
|
|
chp->cmg = scmc_area->cmg;
|
|
chp->shared = scmc_area->shared;
|
|
if (chp->cmg != 2 && chp->cmg != 3) {
|
|
/* No cmg-dependent data. */
|
|
goto out;
|
|
}
|
|
chsc_initialize_cmg_chars(chp, scmc_area->cmcv,
|
|
(struct cmg_chars *) &scmc_area->data);
|
|
out:
|
|
spin_unlock_irqrestore(&chsc_page_lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
int __init chsc_init(void)
|
|
{
|
|
int ret;
|
|
|
|
sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
|
|
chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
|
|
if (!sei_page || !chsc_page) {
|
|
ret = -ENOMEM;
|
|
goto out_err;
|
|
}
|
|
ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw);
|
|
if (ret)
|
|
goto out_err;
|
|
return ret;
|
|
out_err:
|
|
free_page((unsigned long)chsc_page);
|
|
free_page((unsigned long)sei_page);
|
|
return ret;
|
|
}
|
|
|
|
void __init chsc_init_cleanup(void)
|
|
{
|
|
crw_unregister_handler(CRW_RSC_CSS);
|
|
free_page((unsigned long)chsc_page);
|
|
free_page((unsigned long)sei_page);
|
|
}
|
|
|
|
int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code)
|
|
{
|
|
int ret;
|
|
|
|
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);
|
|
}
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
int chsc_enable_facility(int operation_code)
|
|
{
|
|
struct chsc_sda_area *sda_area;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&chsc_page_lock, flags);
|
|
memset(chsc_page, 0, PAGE_SIZE);
|
|
sda_area = chsc_page;
|
|
|
|
ret = __chsc_enable_facility(sda_area, operation_code);
|
|
if (ret != 0)
|
|
CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
|
|
operation_code, sda_area->response.code);
|
|
|
|
spin_unlock_irqrestore(&chsc_page_lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
int __init chsc_get_cssid_iid(int idx, u8 *cssid, u8 *iid)
|
|
{
|
|
struct {
|
|
struct chsc_header request;
|
|
u8 atype;
|
|
u32 : 24;
|
|
u32 reserved1[6];
|
|
struct chsc_header response;
|
|
u32 reserved2[3];
|
|
struct {
|
|
u8 cssid;
|
|
u8 iid;
|
|
u32 : 16;
|
|
} list[];
|
|
} *sdcal_area;
|
|
int ret;
|
|
|
|
spin_lock_irq(&chsc_page_lock);
|
|
memset(chsc_page, 0, PAGE_SIZE);
|
|
sdcal_area = chsc_page;
|
|
sdcal_area->request.length = 0x0020;
|
|
sdcal_area->request.code = 0x0034;
|
|
sdcal_area->atype = 4;
|
|
|
|
ret = chsc(sdcal_area);
|
|
if (ret) {
|
|
ret = (ret == 3) ? -ENODEV : -EBUSY;
|
|
goto exit;
|
|
}
|
|
|
|
ret = chsc_error_from_response(sdcal_area->response.code);
|
|
if (ret) {
|
|
CIO_CRW_EVENT(2, "chsc: sdcal failed (rc=%04x)\n",
|
|
sdcal_area->response.code);
|
|
goto exit;
|
|
}
|
|
|
|
if ((addr_t) &sdcal_area->list[idx] <
|
|
(addr_t) &sdcal_area->response + sdcal_area->response.length) {
|
|
*cssid = sdcal_area->list[idx].cssid;
|
|
*iid = sdcal_area->list[idx].iid;
|
|
}
|
|
else
|
|
ret = -ENODEV;
|
|
exit:
|
|
spin_unlock_irq(&chsc_page_lock);
|
|
return ret;
|
|
}
|
|
|
|
struct css_general_char css_general_characteristics;
|
|
struct css_chsc_char css_chsc_characteristics;
|
|
|
|
int __init
|
|
chsc_determine_css_characteristics(void)
|
|
{
|
|
unsigned long flags;
|
|
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[508];
|
|
} *scsc_area;
|
|
|
|
spin_lock_irqsave(&chsc_page_lock, flags);
|
|
memset(chsc_page, 0, PAGE_SIZE);
|
|
scsc_area = chsc_page;
|
|
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:
|
|
spin_unlock_irqrestore(&chsc_page_lock, flags);
|
|
return result;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(css_general_characteristics);
|
|
EXPORT_SYMBOL_GPL(css_chsc_characteristics);
|
|
|
|
int chsc_sstpc(void *page, unsigned int op, u16 ctrl, long *clock_delta)
|
|
{
|
|
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[3];
|
|
s64 clock_delta;
|
|
unsigned int rsvd4[2];
|
|
} *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;
|
|
if (clock_delta)
|
|
*clock_delta = rr->clock_delta;
|
|
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[];
|
|
} *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;
|
|
}
|
|
|
|
int chsc_stzi(void *page, void *result, size_t size)
|
|
{
|
|
struct {
|
|
struct chsc_header request;
|
|
unsigned int rsvd0[3];
|
|
struct chsc_header response;
|
|
char data[];
|
|
} *rr;
|
|
int rc;
|
|
|
|
memset(page, 0, PAGE_SIZE);
|
|
rr = page;
|
|
rr->request.length = 0x0010;
|
|
rr->request.code = 0x003e;
|
|
rc = chsc(rr);
|
|
if (rc)
|
|
return -EIO;
|
|
memcpy(result, &rr->data, size);
|
|
return (rr->response.code == 0x0001) ? 0 : -EIO;
|
|
}
|
|
|
|
int chsc_siosl(struct subchannel_id schid)
|
|
{
|
|
struct {
|
|
struct chsc_header request;
|
|
u32 word1;
|
|
struct subchannel_id sid;
|
|
u32 word3;
|
|
struct chsc_header response;
|
|
u32 word[11];
|
|
} *siosl_area;
|
|
unsigned long flags;
|
|
int ccode;
|
|
int rc;
|
|
|
|
spin_lock_irqsave(&chsc_page_lock, flags);
|
|
memset(chsc_page, 0, PAGE_SIZE);
|
|
siosl_area = chsc_page;
|
|
siosl_area->request.length = 0x0010;
|
|
siosl_area->request.code = 0x0046;
|
|
siosl_area->word1 = 0x80000000;
|
|
siosl_area->sid = schid;
|
|
|
|
ccode = chsc(siosl_area);
|
|
if (ccode > 0) {
|
|
if (ccode == 3)
|
|
rc = -ENODEV;
|
|
else
|
|
rc = -EBUSY;
|
|
CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n",
|
|
schid.ssid, schid.sch_no, ccode);
|
|
goto out;
|
|
}
|
|
rc = chsc_error_from_response(siosl_area->response.code);
|
|
if (rc)
|
|
CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n",
|
|
schid.ssid, schid.sch_no,
|
|
siosl_area->response.code);
|
|
else
|
|
CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n",
|
|
schid.ssid, schid.sch_no);
|
|
out:
|
|
spin_unlock_irqrestore(&chsc_page_lock, flags);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(chsc_siosl);
|
|
|
|
/**
|
|
* chsc_scm_info() - store SCM information (SSI)
|
|
* @scm_area: request and response block for SSI
|
|
* @token: continuation token
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token)
|
|
{
|
|
int ccode, ret;
|
|
|
|
memset(scm_area, 0, sizeof(*scm_area));
|
|
scm_area->request.length = 0x0020;
|
|
scm_area->request.code = 0x004C;
|
|
scm_area->reqtok = token;
|
|
|
|
ccode = chsc(scm_area);
|
|
if (ccode > 0) {
|
|
ret = (ccode == 3) ? -ENODEV : -EBUSY;
|
|
goto out;
|
|
}
|
|
ret = chsc_error_from_response(scm_area->response.code);
|
|
if (ret != 0)
|
|
CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n",
|
|
scm_area->response.code);
|
|
out:
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(chsc_scm_info);
|
|
|
|
/**
|
|
* chsc_pnso() - Perform Network-Subchannel Operation
|
|
* @schid: id of the subchannel on which PNSO is performed
|
|
* @pnso_area: request and response block for the operation
|
|
* @oc: Operation Code
|
|
* @resume_token: resume token for multiblock response
|
|
* @cnc: Boolean change-notification control
|
|
*
|
|
* pnso_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL)
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int chsc_pnso(struct subchannel_id schid, struct chsc_pnso_area *pnso_area,
|
|
u8 oc, struct chsc_pnso_resume_token resume_token, int cnc)
|
|
{
|
|
memset(pnso_area, 0, sizeof(*pnso_area));
|
|
pnso_area->request.length = 0x0030;
|
|
pnso_area->request.code = 0x003d; /* network-subchannel operation */
|
|
pnso_area->m = schid.m;
|
|
pnso_area->ssid = schid.ssid;
|
|
pnso_area->sch = schid.sch_no;
|
|
pnso_area->cssid = schid.cssid;
|
|
pnso_area->oc = oc;
|
|
pnso_area->resume_token = resume_token;
|
|
pnso_area->n = (cnc != 0);
|
|
if (chsc(pnso_area))
|
|
return -EIO;
|
|
return chsc_error_from_response(pnso_area->response.code);
|
|
}
|
|
|
|
int chsc_sgib(u32 origin)
|
|
{
|
|
struct {
|
|
struct chsc_header request;
|
|
u16 op;
|
|
u8 reserved01[2];
|
|
u8 reserved02:4;
|
|
u8 fmt:4;
|
|
u8 reserved03[7];
|
|
/* operation data area begin */
|
|
u8 reserved04[4];
|
|
u32 gib_origin;
|
|
u8 reserved05[10];
|
|
u8 aix;
|
|
u8 reserved06[4029];
|
|
struct chsc_header response;
|
|
u8 reserved07[4];
|
|
} *sgib_area;
|
|
int ret;
|
|
|
|
spin_lock_irq(&chsc_page_lock);
|
|
memset(chsc_page, 0, PAGE_SIZE);
|
|
sgib_area = chsc_page;
|
|
sgib_area->request.length = 0x0fe0;
|
|
sgib_area->request.code = 0x0021;
|
|
sgib_area->op = 0x1;
|
|
sgib_area->gib_origin = origin;
|
|
|
|
ret = chsc(sgib_area);
|
|
if (ret == 0)
|
|
ret = chsc_error_from_response(sgib_area->response.code);
|
|
spin_unlock_irq(&chsc_page_lock);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(chsc_sgib);
|
|
|
|
#define SCUD_REQ_LEN 0x10 /* SCUD request block length */
|
|
#define SCUD_REQ_CMD 0x4b /* SCUD Command Code */
|
|
|
|
struct chse_cudb {
|
|
u16 flags:8;
|
|
u16 chp_valid:8;
|
|
u16 cu;
|
|
u32 esm_valid:8;
|
|
u32:24;
|
|
u8 chpid[8];
|
|
u32:32;
|
|
u32:32;
|
|
u8 esm[8];
|
|
u32 efla[8];
|
|
} __packed;
|
|
|
|
struct chsc_scud {
|
|
struct chsc_header request;
|
|
u16:4;
|
|
u16 fmt:4;
|
|
u16 cssid:8;
|
|
u16 first_cu;
|
|
u16:16;
|
|
u16 last_cu;
|
|
u32:32;
|
|
struct chsc_header response;
|
|
u16:4;
|
|
u16 fmt_resp:4;
|
|
u32:24;
|
|
struct chse_cudb cudb[];
|
|
} __packed;
|
|
|
|
/**
|
|
* chsc_scud() - Store control-unit description.
|
|
* @cu: number of the control-unit
|
|
* @esm: 8 1-byte endpoint security mode values
|
|
* @esm_valid: validity mask for @esm
|
|
*
|
|
* Interface to retrieve information about the endpoint security
|
|
* modes for up to 8 paths of a control unit.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int chsc_scud(u16 cu, u64 *esm, u8 *esm_valid)
|
|
{
|
|
struct chsc_scud *scud = chsc_page;
|
|
int ret;
|
|
|
|
spin_lock_irq(&chsc_page_lock);
|
|
memset(chsc_page, 0, PAGE_SIZE);
|
|
scud->request.length = SCUD_REQ_LEN;
|
|
scud->request.code = SCUD_REQ_CMD;
|
|
scud->fmt = 0;
|
|
scud->cssid = 0;
|
|
scud->first_cu = cu;
|
|
scud->last_cu = cu;
|
|
|
|
ret = chsc(scud);
|
|
if (!ret)
|
|
ret = chsc_error_from_response(scud->response.code);
|
|
|
|
if (!ret && (scud->response.length <= 8 || scud->fmt_resp != 0
|
|
|| !(scud->cudb[0].flags & 0x80)
|
|
|| scud->cudb[0].cu != cu)) {
|
|
|
|
CIO_MSG_EVENT(2, "chsc: scud failed rc=%04x, L2=%04x "
|
|
"FMT=%04x, cudb.flags=%02x, cudb.cu=%04x",
|
|
scud->response.code, scud->response.length,
|
|
scud->fmt_resp, scud->cudb[0].flags, scud->cudb[0].cu);
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
if (ret)
|
|
goto out;
|
|
|
|
memcpy(esm, scud->cudb[0].esm, sizeof(*esm));
|
|
*esm_valid = scud->cudb[0].esm_valid;
|
|
out:
|
|
spin_unlock_irq(&chsc_page_lock);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(chsc_scud);
|