From patchwork Tue Sep 19 14:41:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Gu X-Patchwork-Id: 13391549 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F1ACE3AC0F for ; Tue, 19 Sep 2023 14:43:03 +0000 (UTC) Received: from out30-119.freemail.mail.aliyun.com (out30-119.freemail.mail.aliyun.com [115.124.30.119]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B15471A8; Tue, 19 Sep 2023 07:42:59 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R161e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045168;MF=guwen@linux.alibaba.com;NM=1;PH=DS;RN=13;SR=0;TI=SMTPD_---0VsRxWB5_1695134574; Received: from localhost(mailfrom:guwen@linux.alibaba.com fp:SMTPD_---0VsRxWB5_1695134574) by smtp.aliyun-inc.com; Tue, 19 Sep 2023 22:42:56 +0800 From: Wen Gu To: kgraul@linux.ibm.com, wenjia@linux.ibm.com, jaka@linux.ibm.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: alibuda@linux.alibaba.com, tonylu@linux.alibaba.com, guwen@linux.alibaba.com, linux-s390@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next 10/18] net/smc: implement ID-related operations of loopback Date: Tue, 19 Sep 2023 22:41:54 +0800 Message-Id: <1695134522-126655-11-git-send-email-guwen@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1695134522-126655-1-git-send-email-guwen@linux.alibaba.com> References: <1695134522-126655-1-git-send-email-guwen@linux.alibaba.com> X-Spam-Status: No, score=-9.9 required=5.0 tests=BAYES_00, ENV_AND_HDR_SPF_MATCH,RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,USER_IN_DEF_SPF_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: X-Patchwork-Delegate: kuba@kernel.org This patch implements GID/CHID/SEID related operations of SMC-D loopback device. In loopback device, GID is generated by UUIDv4 algorithm, CHID is reserved 0xFFFF, SEID is generated using the same algorithm as ISM device under s390 architecture, and is 0 and disabled under non-s390 architecture. Signed-off-by: Wen Gu --- include/net/smc.h | 6 ++++ net/smc/smc_ism.h | 2 ++ net/smc/smc_loopback.c | 95 ++++++++++++++++++++++++++++++++++++++++++++++---- net/smc/smc_loopback.h | 3 ++ 4 files changed, 100 insertions(+), 6 deletions(-) diff --git a/include/net/smc.h b/include/net/smc.h index a37fb38..389d26d 100644 --- a/include/net/smc.h +++ b/include/net/smc.h @@ -41,6 +41,12 @@ struct smcd_dmb { dma_addr_t dma_addr; }; +struct smcd_seid { + u8 seid_string[24]; + u8 serial_number[4]; + u8 type[4]; +}; + #define ISM_EVENT_DMB 0 #define ISM_EVENT_GID 1 #define ISM_EVENT_SWR 2 diff --git a/net/smc/smc_ism.h b/net/smc/smc_ism.h index e6ea08c..7ab82dd 100644 --- a/net/smc/smc_ism.h +++ b/net/smc/smc_ism.h @@ -15,6 +15,8 @@ #include "smc.h" +#define S390_ISM_IDENT_MASK 0x00FFFF + #define SMC_VIRT_ISM_CHID_MAX 0xFFFF #define SMC_VIRT_ISM_CHID_MIN 0xFF00 diff --git a/net/smc/smc_loopback.c b/net/smc/smc_loopback.c index 7d88856..6b8ff65 100644 --- a/net/smc/smc_loopback.c +++ b/net/smc/smc_loopback.c @@ -18,11 +18,92 @@ #include "smc_ism.h" #include "smc_loopback.h" +#define SMC_LO_SUPPORTS_V2 0x1 /* SMC-D loopback supports SMC-Dv2 */ + static const char smc_lo_dev_name[] = "smc_lo"; +static struct smcd_seid SMC_LO_SEID = { + .seid_string = "IBM-SYSZ-ISMSEID00000000", + .serial_number = "0000", + .type = "0000", +}; + static struct smc_lo_dev *lo_dev; +static void smc_lo_create_seid(struct smcd_seid *seid) +{ +#if IS_ENABLED(CONFIG_S390) + struct cpuid id; + u16 ident_tail; + char tmp[5]; + + get_cpu_id(&id); + ident_tail = (u16)(id.ident & S390_ISM_IDENT_MASK); + snprintf(tmp, 5, "%04X", ident_tail); + memcpy(&seid->serial_number, tmp, 4); + snprintf(tmp, 5, "%04X", id.machine); + memcpy(&seid->type, tmp, 4); +#else + memset(seid, 0, SMC_MAX_EID_LEN); +#endif +} + +static void smc_lo_generate_id(struct smc_lo_dev *ldev) +{ + struct smcd_gid *lgid = &ldev->local_gid; + uuid_t uuid; + + uuid_gen(&uuid); + memcpy(&lgid->gid, &uuid, sizeof(lgid->gid)); + memcpy(&lgid->gid_ext, (u8 *)&uuid + sizeof(lgid->gid), + sizeof(lgid->gid_ext)); + + ldev->chid = SMC_LO_CHID; + smc_lo_create_seid(&SMC_LO_SEID); +} + +static int smc_lo_query_rgid(struct smcd_dev *smcd, struct smcd_gid *rgid, + u32 vid_valid, u32 vid) +{ + struct smc_lo_dev *ldev = smcd->priv; + + /* rgid should equal to lgid in loopback */ + if (!ldev || rgid->gid != ldev->local_gid.gid || + rgid->gid_ext != ldev->local_gid.gid_ext) + return -ENETUNREACH; + return 0; +} + +static int smc_lo_supports_v2(void) +{ + return SMC_LO_SUPPORTS_V2; +} + +static u8 *smc_lo_get_system_eid(void) +{ + return SMC_LO_SEID.seid_string; +} + +static void smc_lo_get_local_gid(struct smcd_dev *smcd, + struct smcd_gid *smcd_gid) +{ + struct smc_lo_dev *ldev = smcd->priv; + + smcd_gid->gid = ldev->local_gid.gid; + smcd_gid->gid_ext = ldev->local_gid.gid_ext; +} + +static u16 smc_lo_get_chid(struct smcd_dev *smcd) +{ + return ((struct smc_lo_dev *)smcd->priv)->chid; +} + +static struct device *smc_lo_get_dev(struct smcd_dev *smcd) +{ + return &((struct smc_lo_dev *)smcd->priv)->dev; +} + static const struct smcd_ops lo_ops = { - .query_remote_gid = NULL, + .query_remote_gid = smc_lo_query_rgid, .register_dmb = NULL, .unregister_dmb = NULL, .add_vlan_id = NULL, @@ -31,11 +112,11 @@ .reset_vlan_required = NULL, .signal_event = NULL, .move_data = NULL, - .supports_v2 = NULL, - .get_system_eid = NULL, - .get_local_gid = NULL, - .get_chid = NULL, - .get_dev = NULL, + .supports_v2 = smc_lo_supports_v2, + .get_system_eid = smc_lo_get_system_eid, + .get_local_gid = smc_lo_get_local_gid, + .get_chid = smc_lo_get_chid, + .get_dev = smc_lo_get_dev, }; static struct smcd_dev *smcd_lo_alloc_dev(const struct smcd_ops *ops, @@ -103,6 +184,8 @@ static void smc_lo_dev_release(struct device *dev) static int smc_lo_dev_init(struct smc_lo_dev *ldev) { + smc_lo_generate_id(ldev); + return smcd_lo_register_dev(ldev); } diff --git a/net/smc/smc_loopback.h b/net/smc/smc_loopback.h index 0f7583c..2156f22 100644 --- a/net/smc/smc_loopback.h +++ b/net/smc/smc_loopback.h @@ -18,11 +18,14 @@ #include #include +#define SMC_LO_CHID 0xFFFF #define SMC_LODEV_MAX_DMBS 5000 struct smc_lo_dev { struct smcd_dev *smcd; struct device dev; + u16 chid; + struct smcd_gid local_gid; }; int smc_loopback_init(void);