From patchwork Fri Oct 2 19:39:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Haberland X-Patchwork-Id: 11814531 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7E2AC139F for ; Fri, 2 Oct 2020 19:39:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 252DA208B6 for ; Fri, 2 Oct 2020 19:39:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="D0tzyK8S" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388416AbgJBTjt (ORCPT ); Fri, 2 Oct 2020 15:39:49 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:64078 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388377AbgJBTjs (ORCPT ); Fri, 2 Oct 2020 15:39:48 -0400 Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 092JWean084221; Fri, 2 Oct 2020 15:39:46 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=pp1; bh=/LM26F8g3cNQnCO0khdM/oE2y/mz5Bzwib3hyMGmbCo=; b=D0tzyK8SvuZ867itwrnEbnAYF21zMOAmLizwvVoZHNo46RQ4Zo7wqH2vvWTAjOwDfUcF MnDJwwctf4db6dbG4xCRLHoAcmstZRPWHiPKeqrdCnwjZ+DpZ2tK0VDXuhkpMhAkmUF2 lLIDVvW93a0hoT9pAJnnoUzzVbXvbCxAT10P6phYxAgGpHiCSNoRPrHSua8N9ekGgUAA qWRBeLd9ESP/EGde/mDCV4l49ADJ+Gy6PeNjt2kHE926q47l2cEj/brD/5Rf/I7YN1PS J5fQuxR3onEzV+e6WfNVhJRfh8PzXJnTMk2avurv/u12ijlYg4ja3ZVq18xsYhSguv3r QA== Received: from ppma03ams.nl.ibm.com (62.31.33a9.ip4.static.sl-reverse.com [169.51.49.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 33xa7r0f0j-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 02 Oct 2020 15:39:46 -0400 Received: from pps.filterd (ppma03ams.nl.ibm.com [127.0.0.1]) by ppma03ams.nl.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 092JcIWl030722; Fri, 2 Oct 2020 19:39:44 GMT Received: from b06avi18878370.portsmouth.uk.ibm.com (b06avi18878370.portsmouth.uk.ibm.com [9.149.26.194]) by ppma03ams.nl.ibm.com with ESMTP id 33sw986vmj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 02 Oct 2020 19:39:44 +0000 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 092JdfOS18219410 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 2 Oct 2020 19:39:41 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 378794203F; Fri, 2 Oct 2020 19:39:41 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1EB0A42045; Fri, 2 Oct 2020 19:39:41 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Fri, 2 Oct 2020 19:39:41 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 20191) id A8169E02FD; Fri, 2 Oct 2020 21:39:40 +0200 (CEST) From: Stefan Haberland To: axboe@kernel.dk Cc: linux-block@vger.kernel.org, hoeppner@linux.ibm.com, linux-s390@vger.kernel.org, heiko.carstens@de.ibm.com, gor@linux.ibm.com, borntraeger@de.ibm.com Subject: [PATCH 03/10] s390/cio: Add support for FCES status notification Date: Fri, 2 Oct 2020 21:39:33 +0200 Message-Id: <20201002193940.24012-4-sth@linux.ibm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201002193940.24012-1-sth@linux.ibm.com> References: <20201002193940.24012-1-sth@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-10-02_14:2020-10-02,2020-10-02 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 impostorscore=0 lowpriorityscore=0 clxscore=1015 priorityscore=1501 adultscore=0 spamscore=0 mlxlogscore=999 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2010020137 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Vineeth Vijayan Fibre Channel Endpoint-Security event is received as an sei:nt0 type in the CIO layer. This information needs to be shared with the CCW device drivers using the path_events callback. Reference-ID: IO1812 Signed-off-by: Vineeth Vijayan Co-developed-by: Sebastian Ott Signed-off-by: Sebastian Ott Reviewed-by: Peter Oberparleiter Acked-by: Vasily Gorbik Signed-off-by: Stefan Haberland --- arch/s390/include/asm/ccwdev.h | 2 ++ drivers/s390/cio/chp.h | 1 + drivers/s390/cio/chsc.c | 62 +++++++++++++++++++++++++++++----- drivers/s390/cio/device.c | 15 +++++++- 4 files changed, 70 insertions(+), 10 deletions(-) diff --git a/arch/s390/include/asm/ccwdev.h b/arch/s390/include/asm/ccwdev.h index 3cfe1eb89838..14e1bbfd969e 100644 --- a/arch/s390/include/asm/ccwdev.h +++ b/arch/s390/include/asm/ccwdev.h @@ -104,6 +104,8 @@ struct ccw_device { was successfully verified. */ #define PE_PATHGROUP_ESTABLISHED 0x4 /* A pathgroup was reset and had to be established again. */ +#define PE_PATH_FCES_EVENT 0x8 /* The FCES Status of a path has + * changed. */ /* * Possible CIO actions triggered by the unit check handler. diff --git a/drivers/s390/cio/chp.h b/drivers/s390/cio/chp.h index 20259f3fbf45..7ee9eba0abcb 100644 --- a/drivers/s390/cio/chp.h +++ b/drivers/s390/cio/chp.h @@ -23,6 +23,7 @@ #define CHP_OFFLINE 1 #define CHP_VARY_ON 2 #define CHP_VARY_OFF 3 +#define CHP_FCES_EVENT 4 struct chp_link { struct chp_id chpid; diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index 513fc5748d6e..04fbcfcf9e42 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -37,6 +37,9 @@ static void *sei_page; static void *chsc_page; static DEFINE_SPINLOCK(chsc_page_lock); +#define SEI_VF_FLA 0xc0 /* VF flag for Full Link Address */ +#define SEI_RS_CHPID 0x4 /* 4 in RS field indicates CHPID */ + /** * chsc_error_from_response() - convert a chsc response to an error * @response: chsc response code @@ -285,6 +288,15 @@ static void s390_process_res_acc(struct chp_link *link) css_schedule_reprobe(); } +static int process_fces_event(struct subchannel *sch, void *data) +{ + spin_lock_irq(sch->lock); + if (sch->driver && sch->driver->chp_event) + sch->driver->chp_event(sch, data, CHP_FCES_EVENT); + spin_unlock_irq(sch->lock); + return 0; +} + struct chsc_sei_nt0_area { u8 flags; u8 vf; /* validity flags */ @@ -362,6 +374,16 @@ static char *store_ebcdic(char *dest, const char *src, unsigned long len, return dest + len; } +static void chsc_link_from_sei(struct chp_link *link, + struct chsc_sei_nt0_area *sei_area) +{ + if ((sei_area->vf & SEI_VF_FLA) != 0) { + link->fla = sei_area->fla; + link->fla_mask = ((sei_area->vf & SEI_VF_FLA) == SEI_VF_FLA) ? + 0xffff : 0xff00; + } +} + /* Format node ID and parameters for output in LIR log message. */ static void format_node_data(char *params, char *id, struct node_descriptor *nd) { @@ -451,15 +473,7 @@ static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area) } memset(&link, 0, sizeof(struct chp_link)); link.chpid = chpid; - if ((sei_area->vf & 0xc0) != 0) { - link.fla = sei_area->fla; - if ((sei_area->vf & 0xc0) == 0xc0) - /* full link address */ - link.fla_mask = 0xffff; - else - /* link address */ - link.fla_mask = 0xff00; - } + chsc_link_from_sei(&link, sei_area); s390_process_res_acc(&link); } @@ -568,6 +582,33 @@ static void chsc_process_sei_ap_cfg_chg(struct chsc_sei_nt0_area *sei_area) 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) { @@ -609,6 +650,9 @@ static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area) 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); diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index b29fe8d50baf..aab13c78db9f 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -1170,7 +1170,8 @@ static int io_subchannel_chp_event(struct subchannel *sch, struct chp_link *link, int event) { struct ccw_device *cdev = sch_get_cdev(sch); - int mask; + int mask, chpid, valid_bit; + int path_event[8]; mask = chp_ssd_get_mask(&sch->ssd_info, link); if (!mask) @@ -1205,6 +1206,18 @@ static int io_subchannel_chp_event(struct subchannel *sch, cdev->private->path_new_mask |= mask; io_subchannel_verify(sch); break; + case CHP_FCES_EVENT: + /* Forward Endpoint Security event */ + for (chpid = 0, valid_bit = 0x80; chpid < 8; chpid++, + valid_bit >>= 1) { + if (mask & valid_bit) + path_event[chpid] = PE_PATH_FCES_EVENT; + else + path_event[chpid] = PE_NONE; + } + if (cdev) + cdev->drv->path_event(cdev, path_event); + break; } return 0; }