From patchwork Fri Aug 9 16:42:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Karan Tilak Kumar (kartilak)" X-Patchwork-Id: 13759018 Received: from alln-iport-1.cisco.com (alln-iport-1.cisco.com [173.37.142.88]) (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 3791721A1C; Fri, 9 Aug 2024 16:46:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=173.37.142.88 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723221964; cv=none; b=HNQCYcAkez1IM9m2YE4ODrCsG2ctDWCLdwmlYEL4rdT4PAzlUTpnBE2ZMwJZj1Ixkb0L2dl8Xbcd6ZCI427u8YtFi80iOA6rSRFw0Wba+Xy5pjR4wpjEiWRlxal4z4M/RJUX9WzW5Ae9htg6hLuiy5QdSP78P8NlVO1zlca2VV0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723221964; c=relaxed/simple; bh=KIvjtAv4d6S9WDI/fsy/BxgQJlHvOna8i2D5IIGlyfg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=A3bh+Ye7iBs8UIYOHfwWXVlf445MSFUYPH6sIMgS2008Smw3IgL1F7EhFIgmqnUrOKi1YbgZcETR4oqMr7mFwv9azLJZSu73VwtMFJ+D4s9jSQLNxinvDW7C1K7Z/yH2uw+gabwl8u66Vt7FZTbM+SnmTBU+lUKcMhVmjsx890Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=cisco.com; spf=pass smtp.mailfrom=cisco.com; dkim=pass (1024-bit key) header.d=cisco.com header.i=@cisco.com header.b=mMJWNVRX; arc=none smtp.client-ip=173.37.142.88 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=cisco.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=cisco.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=cisco.com header.i=@cisco.com header.b="mMJWNVRX" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cisco.com; i=@cisco.com; l=60627; q=dns/txt; s=iport; t=1723221961; x=1724431561; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=F1rsL1qkUIGjwq7X4OMCyhCC7FmjdRfYalK10q7SRLs=; b=mMJWNVRX08M0CLliJu/04vHWMICEo2XFj3UyW2Rjy2l0tFSVzJ0KTgNU +X3QPmo5AmYNZJHYolyRfrTRCx55EiTDjUvGP4Gd8IghIpsB3pv4+YWJN 0RzTnKk+yqr7rGRmv47QCtMq1F9A8MfhC8uV0fFJmNirlnb3FRdoorxYQ w=; X-CSE-ConnectionGUID: zmZ5+fAVR2Kz0y6aMBzLgQ== X-CSE-MsgGUID: 8PezdBv+TAa+Up02CGPBeg== X-IronPort-AV: E=Sophos;i="6.09,276,1716249600"; d="scan'208";a="335628476" Received: from rcdn-core-5.cisco.com ([173.37.93.156]) by alln-iport-1.cisco.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Aug 2024 16:44:52 +0000 Received: from localhost.cisco.com ([10.193.101.253]) (authenticated bits=0) by rcdn-core-5.cisco.com (8.15.2/8.15.2) with ESMTPSA id 479Ggo2Z031305 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Fri, 9 Aug 2024 16:44:51 GMT From: Karan Tilak Kumar To: sebaddel@cisco.com Cc: arulponn@cisco.com, djhawar@cisco.com, gcboffa@cisco.com, mkai2@cisco.com, satishkh@cisco.com, aeasi@cisco.com, jejb@linux.ibm.com, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Karan Tilak Kumar Subject: [PATCH v2 04/14] scsi: fnic: Add support for target based solicited requests and responses Date: Fri, 9 Aug 2024 09:42:30 -0700 Message-Id: <20240809164240.47561-5-kartilak@cisco.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20240809164240.47561-1-kartilak@cisco.com> References: <20240809164240.47561-1-kartilak@cisco.com> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Authenticated-User: kartilak@cisco.com X-Outbound-SMTP-Client: 10.193.101.253, [10.193.101.253] X-Outbound-Node: rcdn-core-5.cisco.com Add support for target based solicited requests and responses. Add support for tport definitions and processing. Add support for restarting the IT nexus. Reviewed-by: Sesidhar Baddela Reviewed-by: Arulprabhu Ponnusamy Reviewed-by: Gian Carlo Boffa Signed-off-by: Karan Tilak Kumar --- Changes between v1 and v2: Incorporate review comments from Hannes: Use the correct kernel-doc format. Replace htonll() with get_unaligned_be64(). Replace fnic_del_fabric_timer_sync macro calls to function calls. Replace fnic_del_tport_timer_sync macro calls to function calls. Rename fc_abts_s to fc_tport_abts_s. Modify fc_tport_abts_s to be a global frame. Rename variable pfc_abts to tport_abts. Replace definitions with standard definitions from fc_els.h. Modify functions with returns in the middle to if else clauses. Replace simultaneous use of fc_tport_abts_s and tport_abts with just tport_abts. --- drivers/scsi/fnic/fdls_disc.c | 1580 ++++++++++++++++++++++++++++++--- drivers/scsi/fnic/fnic.h | 6 + drivers/scsi/fnic/fnic_fdls.h | 4 + 3 files changed, 1473 insertions(+), 117 deletions(-) diff --git a/drivers/scsi/fnic/fdls_disc.c b/drivers/scsi/fnic/fdls_disc.c index 2dda1ce9a55f..696f8d926865 100644 --- a/drivers/scsi/fnic/fdls_disc.c +++ b/drivers/scsi/fnic/fdls_disc.c @@ -11,6 +11,8 @@ #include #include +#define FC_FC4_TYPE_SCSI 0x08 + static void fdls_send_rpn_id(struct fnic_iport_s *iport); /* Frame initialization */ @@ -59,6 +61,19 @@ struct fc_rpn_id_s fnic_rpn_id_req = { .command = FC_CT_RPN_CMD} }; +/* + * Variables: + * did, sid, oxid + */ +struct fc_els_prli_s fnic_prli_req = { + .fchdr = {.r_ctl = 0x22, .type = 0x01, + .f_ctl = FNIC_ELS_REQ_FCTL, .rx_id = 0xFFFF}, + .command = ELS_PRLI, + .page_len = 16, + .payload_len = 0x1400, + .sp = {.type = 0x08, .flags = 0x0020, .csp = 0xA2000000} +}; + /* * Variables: * fh_s_id, port_id, port_name @@ -128,14 +143,61 @@ struct fc_hdr_s fc_fabric_abts_s = { .param = 0x00000000, /* bit:0 = 0 Abort a exchange */ }; +struct fc_hdr_s fc_tport_abts_s = { + .r_ctl = 0x81, /* ABTS */ + .cs_ctl = 0x00, .type = 0x00, .f_ctl = FNIC_REQ_ABTS_FCTL, .seq_id = + 0x00, .df_ctl = 0x00, .seq_cnt = 0x0000, .rx_id = 0xFFFF, + .param = 0x00000000, /* bit:0 = 0 Abort a exchange */ +}; + #define RETRIES_EXHAUSTED(iport) \ (iport->fabric.retry_counter == FABRIC_LOGO_MAX_RETRY) +#define FNIC_TPORT_MAX_NEXUS_RESTART (8) + +/* Private Functions */ static void fdls_process_flogi_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr, void *rx_frame); static void fnic_fdls_start_plogi(struct fnic_iport_s *iport); +static struct fnic_tport_s *fdls_create_tport(struct fnic_iport_s *iport, + uint32_t fcid, + uint64_t wwpn); +static void fdls_target_restart_nexus(struct fnic_tport_s *tport); +static void fdls_start_tport_timer(struct fnic_iport_s *iport, + struct fnic_tport_s *tport, int timeout); + static void fdls_start_fabric_timer(struct fnic_iport_s *iport, int timeout); +static void fdls_tport_timer_callback(struct timer_list *t); + +static uint16_t fdls_alloc_tgt_oxid(struct fnic_iport_s *iport, + uint16_t base) +{ + int i; + int start, end; + + start = base - FDLS_PLOGI_OXID_BASE; + end = start + FDLS_TGT_OXID_BLOCK_SZ; + + for (i = start; i < end; i++) { + if (iport->tgt_oxid_pool[i] == 0) { + iport->tgt_oxid_pool[i] = 1; + return (i + FDLS_PLOGI_OXID_BASE); + } + } + return 0xFFFF; +} + +static void fdls_free_tgt_oxid(struct fnic_iport_s *iport, uint16_t oxid) +{ + struct fnic *fnic = iport->fnic; + + if (iport->tgt_oxid_pool[oxid - FDLS_PLOGI_OXID_BASE] != 1) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Freeing unused OXID: 0x%x", oxid); + } + iport->tgt_oxid_pool[oxid - FDLS_PLOGI_OXID_BASE] = 0; +} inline void fnic_del_fabric_timer_sync(struct fnic *fnic) { @@ -180,6 +242,55 @@ fdls_start_fabric_timer(struct fnic_iport_s *iport, int timeout) "fabric timer is %d ", timeout); } +static void +fdls_start_tport_timer(struct fnic_iport_s *iport, + struct fnic_tport_s *tport, int timeout) +{ + u64 fabric_tov; + struct fnic *fnic = iport->fnic; + + if (tport->timer_pending) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "tport fcid 0x%x: Canceling disc timer\n", + tport->fcid); + fnic_del_tport_timer_sync(fnic, tport); + tport->timer_pending = 0; + } + + if (!(tport->flags & FNIC_FDLS_TGT_ABORT_ISSUED)) + tport->retry_counter++; + + fabric_tov = jiffies + msecs_to_jiffies(timeout); + mod_timer(&tport->retry_timer, round_jiffies(fabric_tov)); + tport->timer_pending = 1; +} + +void +fdls_send_tport_abts(struct fnic_iport_s *iport, + struct fnic_tport_s *tport) +{ + uint8_t s_id[3]; + uint8_t d_id[3]; + struct fnic *fnic = iport->fnic; + struct fc_hdr_s *tport_abts = &fc_tport_abts_s; + + hton24(s_id, iport->fcid); + hton24(d_id, tport->fcid); + FNIC_SET_S_ID(tport_abts, s_id); + FNIC_SET_D_ID(tport_abts, d_id); + tport->flags |= FNIC_FDLS_TGT_ABORT_ISSUED; + + tport_abts->ox_id = tport->oxid_used; + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "FDLS sending tport abts: tport->state: %d ", + tport->state); + + fnic_send_fcoe_frame(iport, &fc_tport_abts_s, sizeof(struct fc_hdr_s)); + /* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */ + fdls_start_tport_timer(iport, tport, 2 * iport->r_a_tov); +} + static void fdls_send_fabric_abts(struct fnic_iport_s *iport) { uint8_t fcid[3]; @@ -357,6 +468,169 @@ static void fdls_send_gpn_ft(struct fnic_iport_s *iport, int fdls_state) fdls_set_state((&iport->fabric), fdls_state); } +static void +fdls_send_tgt_adisc(struct fnic_iport_s *iport, struct fnic_tport_s *tport) +{ + struct fc_els_adisc_s adisc; + uint8_t s_id[3]; + uint8_t d_id[3]; + uint16_t oxid; + struct fnic *fnic = iport->fnic; + + memset(&adisc, 0, sizeof(struct fc_els_adisc_s)); + adisc.fchdr.r_ctl = 0x22; + adisc.fchdr.type = 0x01; + adisc.fchdr.f_ctl = FNIC_ELS_REQ_FCTL; + adisc.fchdr.rx_id = 0xFFFF; + + hton24(s_id, iport->fcid); + hton24(d_id, tport->fcid); + FNIC_SET_S_ID((&adisc.fchdr), s_id); + FNIC_SET_D_ID((&adisc.fchdr), d_id); + + oxid = htons(fdls_alloc_tgt_oxid(iport, FDLS_ADISC_OXID_BASE)); + if (oxid == 0xFFFF) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Failed to allocate OXID to send ADISC %p", iport); + return; + } + + tport->oxid_used = oxid; + tport->flags &= ~FNIC_FDLS_TGT_ABORT_ISSUED; + + FNIC_SET_OX_ID((&adisc.fchdr), oxid); + FNIC_SET_NPORT_NAME(adisc, iport->wwpn); + FNIC_SET_NODE_NAME(adisc, iport->wwnn); + + memcpy(adisc.fcid, s_id, 3); + adisc.command = ELS_ADISC; + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "sending ADISC to tgt fcid: 0x%x", tport->fcid); + + fnic_send_fcoe_frame(iport, &adisc, sizeof(struct fc_els_adisc_s)); + /* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */ + fdls_start_tport_timer(iport, tport, 2 * iport->e_d_tov); +} + +void fdls_delete_tport(struct fnic_iport_s *iport, + struct fnic_tport_s *tport) +{ + struct fnic_tport_event_s *tport_del_evt; + struct fnic *fnic = iport->fnic; + + if ((tport->state == FDLS_TGT_STATE_OFFLINING) + || (tport->state == FDLS_TGT_STATE_OFFLINE)) + return; + + fdls_set_tport_state(tport, FDLS_TGT_STATE_OFFLINING); + /* + * By setting this flag, the tport will not be seen in a look-up + * in an RSCN. Even if we move to multithreaded model, this tport + * will be destroyed and a new RSCN will have to create a new one + */ + tport->flags |= FNIC_FDLS_TPORT_TERMINATING; + + if (tport->timer_pending) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "tport fcid 0x%x: Canceling disc timer\n", + tport->fcid); + fnic_del_tport_timer_sync(fnic, tport); + tport->timer_pending = 0; + } + + if (IS_FNIC_FCP_INITIATOR(fnic)) { + spin_unlock_irqrestore(&fnic->fnic_lock, fnic->lock_flags); + fnic_rport_exch_reset(iport->fnic, tport->fcid); + spin_lock_irqsave(&fnic->fnic_lock, fnic->lock_flags); + + if (tport->flags & FNIC_FDLS_SCSI_REGISTERED) { + tport_del_evt = + kzalloc(sizeof(struct fnic_tport_event_s), GFP_ATOMIC); + if (!tport_del_evt) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Failed to allocate memory for tport fcid: 0x%0x\n", + tport->fcid); + return; + } + tport_del_evt->event = TGT_EV_RPORT_DEL; + tport_del_evt->arg1 = (void *) tport; + list_add_tail(&tport_del_evt->links, &fnic->tport_event_list); + queue_work(fnic_event_queue, &fnic->tport_work); + } else { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "tport 0x%x not reg with scsi_transport. Freeing locally", + tport->fcid); + list_del(&tport->links); + kfree(tport); + } + } +} + +static void +fdls_send_tgt_plogi(struct fnic_iport_s *iport, struct fnic_tport_s *tport) +{ + struct fc_els_s plogi; + uint8_t s_id[3]; + uint8_t d_id[3]; + uint16_t oxid; + struct fnic *fnic = iport->fnic; + uint32_t timeout; + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Send tgt PLOGI to fcid: 0x%x", tport->fcid); + + memcpy(&plogi, &fnic_plogi_req, sizeof(struct fc_els_s)); + + hton24(s_id, iport->fcid); + hton24(d_id, tport->fcid); + + FNIC_SET_S_ID((&plogi.fchdr), s_id); + FNIC_SET_D_ID((&plogi.fchdr), d_id); + FNIC_SET_RDF_SIZE(plogi.u.csp_plogi, iport->max_payload_size); + + oxid = htons(fdls_alloc_tgt_oxid(iport, FDLS_PLOGI_OXID_BASE)); + if (oxid == 0xFFFF) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "0x%x: Failed to allocate oxid to send PLOGI to fcid: 0x%x", + iport->fcid, tport->fcid); + return; + } + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "send tgt PLOGI: tgt fcid: 0x%x oxid: 0x%x", tport->fcid, + ntohs(oxid)); + tport->oxid_used = oxid; + tport->flags &= ~FNIC_FDLS_TGT_ABORT_ISSUED; + + FNIC_SET_OX_ID((&plogi.fchdr), oxid); + FNIC_SET_NPORT_NAME(plogi, iport->wwpn); + FNIC_SET_NODE_NAME(plogi, iport->wwnn); + + timeout = max(2 * iport->e_d_tov, iport->plogi_timeout); + + fnic_send_fcoe_frame(iport, &plogi, sizeof(struct fc_els_s)); + /* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */ + fdls_start_tport_timer(iport, tport, timeout); +} + +static uint16_t +fnic_fc_plogi_rsp_rdf(struct fnic_iport_s *iport, + struct fc_els_s *plogi_rsp) +{ + uint16_t b2b_rdf_size = ntohs(plogi_rsp->u.csp_plogi.b2b_rdf_size); + uint16_t spc3_rdf_size = + ((uint16_t) (plogi_rsp->spc3[6] << 8 | plogi_rsp->spc3[7]) & + FNIC_FC_C3_RDF); + struct fnic *fnic = iport->fnic; + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "MFS: b2b_rdf_size: 0x%x spc3_rdf_size: 0x%x", + b2b_rdf_size, spc3_rdf_size); + + return MIN(b2b_rdf_size, spc3_rdf_size); +} + static void fdls_send_register_fc4_types(struct fnic_iport_s *iport) { struct fc_rft_id rft_id; @@ -406,6 +680,47 @@ static void fdls_send_register_fc4_features(struct fnic_iport_s *iport) fdls_start_fabric_timer(iport, 2 * iport->e_d_tov); } +static void +fdls_send_tgt_prli(struct fnic_iport_s *iport, struct fnic_tport_s *tport) +{ + struct fc_els_prli_s prli; + uint8_t s_id[3]; + uint8_t d_id[3]; + uint16_t oxid; + struct fnic *fnic = iport->fnic; + uint32_t timeout; + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "FDLS sending PRLI to tgt: 0x%x", tport->fcid); + + oxid = htons(fdls_alloc_tgt_oxid(iport, FDLS_PRLI_OXID_BASE)); + if (oxid == 0xFFFF) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Failed to allocate OXID to send PRLI %p", iport); + return; + } + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "FDLS sending PRLI to tgt: 0x%x OXID: 0x%x", tport->fcid, + ntohs(oxid)); + + tport->oxid_used = oxid; + tport->flags &= ~FNIC_FDLS_TGT_ABORT_ISSUED; + memcpy(&prli, &fnic_prli_req, sizeof(struct fc_els_prli_s)); + + hton24(s_id, iport->fcid); + hton24(d_id, tport->fcid); + + FNIC_SET_S_ID((&prli.fchdr), s_id); + FNIC_SET_D_ID((&prli.fchdr), d_id); + FNIC_SET_OX_ID((&prli.fchdr), oxid); + + timeout = max(2 * iport->e_d_tov, iport->plogi_timeout); + + fnic_send_fcoe_frame(iport, &prli, sizeof(struct fc_els_prli_s)); + /* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */ + fdls_start_tport_timer(iport, tport, timeout); +} + /** * fdls_send_fabric_logo - Send flogo to the fcf * @iport: Handle to fnic iport @@ -442,6 +757,201 @@ void fdls_send_fabric_logo(struct fnic_iport_s *iport) fnic_send_fcoe_frame(iport, &logo, sizeof(struct fc_logo_req_s)); } +/** + * fdls_tgt_logout - Send plogo to the remote port + * @iport: Handle to fnic iport + * @tport: Handle to remote port + * + * This function does not change or check the fabric/tport state. + * It the caller's responsibility to set the appropriate tport/fabric + * state when this is called. Normally that is fdls_tgt_state_plogo. + * This could be used to send plogo to nameserver process + * also not just target processes + */ +void fdls_tgt_logout(struct fnic_iport_s *iport, + struct fnic_tport_s *tport) +{ + struct fc_logo_req_s logo; + uint8_t s_id[3]; + uint8_t d_id[3]; + struct fnic *fnic = iport->fnic; + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Sending logo to tport fcid: 0x%x", tport->fcid); + memcpy(&logo, &fnic_logo_req, sizeof(struct fc_logo_req_s)); + + hton24(s_id, iport->fcid); + hton24(d_id, tport->fcid); + + FNIC_SET_S_ID((&logo.fchdr), s_id); + FNIC_SET_D_ID((&logo.fchdr), d_id); + FNIC_SET_OX_ID((&logo.fchdr), FNIC_TLOGO_REQ_OXID); + + memcpy(&logo.fcid, s_id, 3); + logo.wwpn = get_unaligned_be64(&iport->wwpn); + + fnic_send_fcoe_frame(iport, &logo, sizeof(struct fc_logo_req_s)); +} + +static void fdls_tgt_discovery_start(struct fnic_iport_s *iport) +{ + struct fnic_tport_s *tport, *next; + u32 old_link_down_cnt = iport->fnic->link_down_cnt; + struct fnic *fnic = iport->fnic; + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "0x%x: Starting FDLS target discovery", iport->fcid); + + list_for_each_entry_safe(tport, next, &iport->tport_list, links) { + if ((old_link_down_cnt != iport->fnic->link_down_cnt) + || (iport->state != FNIC_IPORT_STATE_READY)) { + break; + } + /* if we marked the tport as deleted due to GPN_FT + * We should not send ADISC anymore + */ + if ((tport->state == FDLS_TGT_STATE_OFFLINING) || + (tport->state == FDLS_TGT_STATE_OFFLINE)) + continue; + + /* For tports which have received RSCN */ + if (tport->flags & FNIC_FDLS_TPORT_SEND_ADISC) { + tport->retry_counter = 0; + fdls_set_tport_state(tport, FDLS_TGT_STATE_ADISC); + tport->flags &= ~FNIC_FDLS_TPORT_SEND_ADISC; + fdls_send_tgt_adisc(iport, tport); + continue; + } + if (fdls_get_tport_state(tport) != FDLS_TGT_STATE_INIT) { + /* Not a new port, skip */ + continue; + } + tport->retry_counter = 0; + fdls_set_tport_state(tport, FDLS_TGT_STATE_PLOGI); + fdls_send_tgt_plogi(iport, tport); + } + fdls_set_state((&iport->fabric), FDLS_STATE_TGT_DISCOVERY); +} + +/* + * Function to restart the IT nexus if we received any out of + * sequence PLOGI/PRLI response from the target. + * The memory for the new tport structure is allocated + * inside fdls_create_tport and added to the iport's tport list. + * This will get freed later during tport_offline/linkdown + * or module unload. The new_tport pointer will go out of scope + * safely since the memory it is + * pointing to it will be freed later + */ +static void fdls_target_restart_nexus(struct fnic_tport_s *tport) +{ + struct fnic_iport_s *iport = tport->iport; + struct fnic_tport_s *new_tport = NULL; + uint32_t fcid; + uint64_t wwpn; + int nexus_restart_count; + struct fnic *fnic = iport->fnic; + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "tport fcid: 0x%x state: %d restart_count: %d", + tport->fcid, tport->state, tport->nexus_restart_count); + + fcid = tport->fcid; + wwpn = tport->wwpn; + nexus_restart_count = tport->nexus_restart_count; + + fdls_delete_tport(iport, tport); + + if (nexus_restart_count >= FNIC_TPORT_MAX_NEXUS_RESTART) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Exceeded nexus restart retries tport: 0x%x", fcid); + return; + } + + /* + * Allocate memory for the new tport and add it to + * iport's tport list. + * This memory will be freed during tport_offline/linkdown + * or module unload. The pointer new_tport is safe to go + * out of scope when this function returns, since the memory + * it is pointing to is guaranteed to be freed later + * as mentioned above. + */ + new_tport = fdls_create_tport(iport, fcid, wwpn); + if (!new_tport) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Error creating new tport: 0x%x", fcid); + return; + } + + new_tport->nexus_restart_count = nexus_restart_count + 1; + fdls_send_tgt_plogi(iport, new_tport); + fdls_set_tport_state(new_tport, FDLS_TGT_STATE_PLOGI); +} + +struct fnic_tport_s *fnic_find_tport_by_fcid(struct fnic_iport_s *iport, + uint32_t fcid) +{ + struct fnic_tport_s *tport, *next; + + list_for_each_entry_safe(tport, next, &(iport->tport_list), links) { + if ((tport->fcid == fcid) + && !(tport->flags & FNIC_FDLS_TPORT_TERMINATING)) + return tport; + } + return NULL; +} + +static struct fnic_tport_s *fdls_create_tport(struct fnic_iport_s *iport, + uint32_t fcid, uint64_t wwpn) +{ + struct fnic_tport_s *tport; + struct fnic *fnic = iport->fnic; + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "FDLS create tport: fcid: 0x%x wwpn: 0x%llx", fcid, wwpn); + + tport = kzalloc(sizeof(struct fnic_tport_s), GFP_ATOMIC); + if (!tport) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Memory allocation failure while creating tport: 0x%x\n", + fcid); + return NULL; + } + + tport->max_payload_size = FNIC_FCOE_MAX_FRAME_SZ; + tport->r_a_tov = FNIC_R_A_TOV_DEF; + tport->e_d_tov = FNIC_E_D_TOV_DEF; + tport->fcid = fcid; + tport->wwpn = wwpn; + tport->iport = iport; + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Need to setup tport timer callback"); + + timer_setup(&tport->retry_timer, fdls_tport_timer_callback, 0); + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Added tport 0x%x", tport->fcid); + fdls_set_tport_state(tport, FDLS_TGT_STATE_INIT); + list_add_tail(&tport->links, &iport->tport_list); + atomic_set(&tport->in_flight, 0); + return tport; +} + +struct fnic_tport_s *fnic_find_tport_by_wwpn(struct fnic_iport_s *iport, + uint64_t wwpn) +{ + struct fnic_tport_s *tport, *next; + + list_for_each_entry_safe(tport, next, &(iport->tport_list), links) { + if ((tport->wwpn == wwpn) + && !(tport->flags & FNIC_FDLS_TPORT_TERMINATING)) + return tport; + } + return NULL; +} + void fdls_fabric_timer_callback(struct timer_list *t) { struct fnic_fdls_fabric_s *fabric = from_timer(fabric, t, retry_timer); @@ -481,11 +991,8 @@ void fdls_fabric_timer_callback(struct timer_list *t) && (iport->fabric.retry_counter < iport->max_flogi_retries)) { iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME; fdls_send_fabric_flogi(iport); - spin_unlock_irqrestore(&fnic->fnic_lock, flags); - return; - } - /* Flogi has time out 2*ed_tov send abts */ - if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) { + } else if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) { + /* Flogi has time out 2*ed_tov send abts */ fdls_send_fabric_abts(iport); } else { /* Flogi ABTS has timed out and we have waited @@ -506,11 +1013,8 @@ void fdls_fabric_timer_callback(struct timer_list *t) && (iport->fabric.retry_counter < iport->max_plogi_retries)) { iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME; fdls_send_fabric_plogi(iport); - spin_unlock_irqrestore(&fnic->fnic_lock, flags); - return; - } + } else if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) { /* Plogi has timed out 2*ed_tov send abts */ - if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) { fdls_send_fabric_abts(iport); } else { /* plogi ABTS has timed out and we have waited @@ -524,130 +1028,620 @@ void fdls_fabric_timer_callback(struct timer_list *t) FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, "Exceeded max PLOGI retries"); } - break; - case FDLS_STATE_RPN_ID: - /* Rpn_id received a LS_RJT with busy we retry from here */ - if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME) - && (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) { - iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME; - fdls_send_rpn_id(iport); - spin_unlock_irqrestore(&fnic->fnic_lock, flags); + break; + case FDLS_STATE_RPN_ID: + /* Rpn_id received a LS_RJT with busy we retry from here */ + if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME) + && (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) { + iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME; + fdls_send_rpn_id(iport); + } else if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) + /* RPN has timed out. Send abts */ + fdls_send_fabric_abts(iport); + else + /* ABTS has timed out (2*ra_tov) */ + fnic_fdls_start_plogi(iport); /* go back to fabric Plogi */ + break; + case FDLS_STATE_SCR: + /* scr received a LS_RJT with busy we retry from here */ + if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME) + && (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) { + iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME; + fdls_send_scr(iport); + } else if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) + /* scr has timed out. Send abts */ + fdls_send_fabric_abts(iport); + else { + /* ABTS has timed out (2*ra_tov), we give up */ + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "ABTS timed out. Starting PLOGI: %p", iport); + fnic_fdls_start_plogi(iport); + } + break; + case FDLS_STATE_REGISTER_FC4_TYPES: + /* scr received a LS_RJT with busy we retry from here */ + if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME) + && (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) { + iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME; + fdls_send_register_fc4_types(iport); + } else if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) { + /* RFT_ID timed out send abts */ + fdls_send_fabric_abts(iport); + } else { + /* ABTS has timed out (2*ra_tov), we give up */ + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "ABTS timed out. Starting PLOGI: %p", iport); + fnic_fdls_start_plogi(iport); /* go back to fabric Plogi */ + } + break; + case FDLS_STATE_REGISTER_FC4_FEATURES: + /* scr received a LS_RJT with busy we retry from here */ + if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME) + && (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) { + iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME; + fdls_send_register_fc4_features(iport); + } else if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) + /* SCR has timed out. Send abts */ + fdls_send_fabric_abts(iport); + else { + /* ABTS has timed out (2*ra_tov), we give up */ + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "ABTS timed out. Starting PLOGI %p", iport); + fnic_fdls_start_plogi(iport); /* go back to fabric Plogi */ + } + break; + case FDLS_STATE_RSCN_GPN_FT: + case FDLS_STATE_SEND_GPNFT: + case FDLS_STATE_GPN_FT: + /* GPN_FT received a LS_RJT with busy we retry from here */ + if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME) + && (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) { + iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME; + fdls_send_gpn_ft(iport, iport->fabric.state); + } else if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) { + /* gpn_ft has timed out. Send abts */ + fdls_send_fabric_abts(iport); + } else { + /* + * ABTS has timed out have waited (2*ra_tov) can + * retry safely with same exchange id + */ + if (iport->fabric.retry_counter < FDLS_RETRY_COUNT) { + fdls_send_gpn_ft(iport, iport->fabric.state); + } else { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "ABTS timeout for fabric GPN_FT. Check name server: %p", + iport); + } + } + break; + default: + break; + } + spin_unlock_irqrestore(&fnic->fnic_lock, flags); +} + +static void fdls_send_delete_tport_msg(struct fnic_tport_s *tport) +{ + struct fnic_iport_s *iport = (struct fnic_iport_s *) tport->iport; + struct fnic *fnic = iport->fnic; + struct fnic_tport_event_s *tport_del_evt; + + if (!IS_FNIC_FCP_INITIATOR(fnic)) + return; + + tport_del_evt = kzalloc(sizeof(struct fnic_tport_event_s), GFP_ATOMIC); + if (!tport_del_evt) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Failed to allocate memory for tport event fcid: 0x%x", + tport->fcid); + return; + } + tport_del_evt->event = TGT_EV_TPORT_DELETE; + tport_del_evt->arg1 = (void *) tport; + list_add_tail(&tport_del_evt->links, &fnic->tport_event_list); + queue_work(fnic_event_queue, &fnic->tport_work); +} + +static void fdls_tport_timer_callback(struct timer_list *t) +{ + struct fnic_tport_s *tport = from_timer(tport, t, retry_timer); + struct fnic_iport_s *iport = (struct fnic_iport_s *) tport->iport; + struct fnic *fnic = iport->fnic; + uint16_t oxid; + unsigned long flags; + + spin_lock_irqsave(&fnic->fnic_lock, flags); + if (!tport->timer_pending) { + spin_unlock_irqrestore(&fnic->fnic_lock, flags); + return; + } + + if (iport->state != FNIC_IPORT_STATE_READY) { + spin_unlock_irqrestore(&fnic->fnic_lock, flags); + return; + } + + if (tport->del_timer_inprogress) { + tport->del_timer_inprogress = 0; + spin_unlock_irqrestore(&fnic->fnic_lock, flags); + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "tport_del_timer inprogress. Skip timer cb tport fcid: 0x%x\n", + tport->fcid); + return; + } + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "tport fcid: 0x%x timer pending: %d state: %d retry counter: %d", + tport->fcid, tport->timer_pending, tport->state, + tport->retry_counter); + + tport->timer_pending = 0; + oxid = ntohs(tport->oxid_used); + + /* We retry plogi/prli/adisc frames depending on the tport state */ + switch (tport->state) { + case FDLS_TGT_STATE_PLOGI: + /* PLOGI frame received a LS_RJT with busy, we retry from here */ + if ((tport->flags & FNIC_FDLS_RETRY_FRAME) + && (tport->retry_counter < iport->max_plogi_retries)) { + fdls_free_tgt_oxid(iport, oxid); + tport->flags &= ~FNIC_FDLS_RETRY_FRAME; + fdls_send_tgt_plogi(iport, tport); + } else if (!(tport->flags & FNIC_FDLS_TGT_ABORT_ISSUED)) { + /* Plogi frame has timed out 2*ed_tov send abts */ + fdls_send_tport_abts(iport, tport); + } else if (tport->retry_counter < iport->max_plogi_retries) { + /* + * ABTS has timed out have waited (2*ra_tov) + * can retry safely + * even if with same exchange id + */ + fdls_free_tgt_oxid(iport, oxid); + fdls_send_tgt_plogi(iport, tport); + } else { + /* exceeded plogi retry count */ + fdls_free_tgt_oxid(iport, oxid); + fdls_send_delete_tport_msg(tport); + } + break; + case FDLS_TGT_STATE_PRLI: + /* PRLI received a LS_RJT with busy , hence we retry from here */ + if ((tport->flags & FNIC_FDLS_RETRY_FRAME) + && (tport->retry_counter < FDLS_RETRY_COUNT)) { + fdls_free_tgt_oxid(iport, oxid); + tport->flags &= ~FNIC_FDLS_RETRY_FRAME; + fdls_send_tgt_prli(iport, tport); + } else if (!(tport->flags & FNIC_FDLS_TGT_ABORT_ISSUED)) { + /* PRLI has time out 2*ed_tov send abts */ + fdls_send_tport_abts(iport, tport); + } else { + /* ABTS has timed out for prli, we go back to PLOGI */ + fdls_free_tgt_oxid(iport, oxid); + fdls_send_tgt_plogi(iport, tport); + fdls_set_tport_state(tport, FDLS_TGT_STATE_PLOGI); + } + break; + case FDLS_TGT_STATE_ADISC: + /* ADISC timed out send a ABTS */ + if (!(tport->flags & FNIC_FDLS_TGT_ABORT_ISSUED)) { + fdls_send_tport_abts(iport, tport); + } else if ((tport->flags & FNIC_FDLS_TGT_ABORT_ISSUED) + && (tport->retry_counter < FDLS_RETRY_COUNT)) { + /* + * ABTS has timed out have waited (2*ra_tov) can + * retry safely even if with same exchange id + */ + fdls_free_tgt_oxid(iport, oxid); + fdls_send_tgt_adisc(iport, tport); + } else { + /* exceeded retry count */ + fdls_free_tgt_oxid(iport, oxid); + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "ADISC not responding. Deleting target port: 0x%x", + tport->fcid); + fdls_send_delete_tport_msg(tport); + } + break; + default: + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Unknown tport state: 0x%x", tport->state); + break; + } + spin_unlock_irqrestore(&fnic->fnic_lock, flags); +} + +static void fnic_fdls_start_flogi(struct fnic_iport_s *iport) +{ + iport->fabric.retry_counter = 0; + fdls_send_fabric_flogi(iport); + fdls_set_state((&iport->fabric), FDLS_STATE_FABRIC_FLOGI); + iport->fabric.flags = 0; +} + +static void fnic_fdls_start_plogi(struct fnic_iport_s *iport) +{ + iport->fabric.retry_counter = 0; + fdls_send_fabric_plogi(iport); + fdls_set_state((&iport->fabric), FDLS_STATE_FABRIC_PLOGI); + iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED; +} + +static void +fdls_process_tgt_adisc_rsp(struct fnic_iport_s *iport, + struct fc_hdr_s *fchdr) +{ + uint32_t tgt_fcid; + struct fnic_tport_s *tport; + uint8_t *fcid; + uint64_t frame_wwnn; + uint64_t frame_wwpn; + uint16_t oxid; + struct fc_els_adisc_ls_acc_s *adisc_rsp = + (struct fc_els_adisc_ls_acc_s *) fchdr; + struct fc_els_reject_s *els_rjt = (struct fc_els_reject_s *) fchdr; + struct fnic *fnic = iport->fnic; + + fcid = FNIC_GET_S_ID(fchdr); + tgt_fcid = ntoh24(fcid); + tport = fnic_find_tport_by_fcid(iport, tgt_fcid); + + if (!tport) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Tgt ADISC response tport not found: 0x%x", tgt_fcid); + return; + } + if ((iport->state != FNIC_IPORT_STATE_READY) + || (tport->state != FDLS_TGT_STATE_ADISC) + || (tport->flags & FNIC_FDLS_TGT_ABORT_ISSUED)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Dropping this ADISC response"); + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "iport state: %d tport state: %d Is abort issued on PRLI? %d", + iport->state, tport->state, + (tport->flags & FNIC_FDLS_TGT_ABORT_ISSUED)); + return; + } + if (ntohs(fchdr->ox_id) != ntohs(tport->oxid_used)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Dropping frame from target: 0x%x", + tgt_fcid); + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Reason: Stale ADISC/Aborted ADISC/OOO frame delivery"); + return; + } + + switch (adisc_rsp->command) { + case ELS_LS_ACC: + if (tport->timer_pending) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "tport 0x%p Canceling fabric disc timer\n", + tport); + fnic_del_tport_timer_sync(fnic, tport); + } + tport->timer_pending = 0; + tport->retry_counter = 0; + oxid = ntohs(fchdr->ox_id); + fdls_free_tgt_oxid(iport, oxid); + frame_wwnn = get_unaligned_be64(&adisc_rsp->node_name); + frame_wwpn = get_unaligned_be64(&adisc_rsp->nport_name); + if ((frame_wwnn == tport->wwnn) && (frame_wwpn == tport->wwpn)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "ADISC accepted from target: 0x%x. Target logged in", + tgt_fcid); + fdls_set_tport_state(tport, FDLS_TGT_STATE_READY); + } else { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Error mismatch frame: ADISC"); + } + break; + + case ELS_LS_RJT: + if (((els_rjt->reason_code == FC_ELS_RJT_LOGICAL_BUSY) + || (els_rjt->reason_code == FC_ELS_RJT_BUSY)) + && (tport->retry_counter < FDLS_RETRY_COUNT)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "ADISC ret ELS_LS_RJT BUSY. Retry from timer routine: 0x%x", + tgt_fcid); + + /* Retry ADISC again from the timer routine. */ + tport->flags |= FNIC_FDLS_RETRY_FRAME; + } else { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "ADISC returned ELS_LS_RJT from target: 0x%x", + tgt_fcid); + oxid = ntohs(fchdr->ox_id); + fdls_free_tgt_oxid(iport, oxid); + fdls_delete_tport(iport, tport); + } + break; + } +} + + +static void +fdls_process_tgt_plogi_rsp(struct fnic_iport_s *iport, + struct fc_hdr_s *fchdr) +{ + uint32_t tgt_fcid; + struct fnic_tport_s *tport; + uint8_t *fcid; + uint16_t oxid; + struct fc_els_s *plogi_rsp = (struct fc_els_s *) fchdr; + struct fc_els_reject_s *els_rjt = (struct fc_els_reject_s *) fchdr; + int max_payload_size; + struct fnic *fnic = iport->fnic; + + fcid = FNIC_GET_S_ID(fchdr); + tgt_fcid = ntoh24(fcid); + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "FDLS processing target PLOGI response: tgt_fcid: 0x%x", + tgt_fcid); + + tport = fnic_find_tport_by_fcid(iport, tgt_fcid); + if (!tport) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "tport not found: 0x%x", tgt_fcid); + return; + } + if ((iport->state != FNIC_IPORT_STATE_READY) + || (tport->flags & FNIC_FDLS_TGT_ABORT_ISSUED)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Dropping frame! iport state: %d tport state: %d", + iport->state, tport->state); + return; + } + + if (tport->state != FDLS_TGT_STATE_PLOGI) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "PLOGI rsp recvd in wrong state. Restarting nexus"); + oxid = ntohs(FNIC_GET_OX_ID(fchdr)); + fdls_free_tgt_oxid(iport, oxid); + fdls_target_restart_nexus(tport); + return; + } + + if (ntohs(fchdr->ox_id) != ntohs(tport->oxid_used)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "PLOGI response from target: 0x%x. Dropping frame", + tgt_fcid); + return; + } + + switch (plogi_rsp->command) { + case ELS_LS_ACC: + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "PLOGI accepted by target: 0x%x", tgt_fcid); + oxid = ntohs(FNIC_GET_OX_ID(fchdr)); + fdls_free_tgt_oxid(iport, oxid); + break; + + case ELS_LS_RJT: + if (((els_rjt->reason_code == FC_ELS_RJT_LOGICAL_BUSY) + || (els_rjt->reason_code == FC_ELS_RJT_BUSY)) + && (tport->retry_counter < iport->max_plogi_retries)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "PLOGI ret ELS_LS_RJT BUSY. Retry from timer routine: 0x%x", + tgt_fcid); + /* Retry plogi again from the timer routine. */ + tport->flags |= FNIC_FDLS_RETRY_FRAME; + return; + } + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "PLOGI returned ELS_LS_RJT from target: 0x%x", + tgt_fcid); + oxid = ntohs(fchdr->ox_id); + fdls_free_tgt_oxid(iport, oxid); + fdls_delete_tport(iport, tport); + return; + + default: + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "PLOGI not accepted from target fcid: 0x%x", + tgt_fcid); + return; + } + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Found the PLOGI target: 0x%x and state: %d", + (unsigned int) tgt_fcid, tport->state); + + if (tport->timer_pending) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "tport fcid 0x%x: Canceling disc timer\n", + tport->fcid); + fnic_del_tport_timer_sync(fnic, tport); + } + + tport->timer_pending = 0; + tport->wwpn = get_unaligned_be64(&plogi_rsp->nport_name); + tport->wwnn = get_unaligned_be64(&plogi_rsp->node_name); + + /* Learn the Service Params */ + + /* Max frame size - choose the lowest */ + max_payload_size = fnic_fc_plogi_rsp_rdf(iport, plogi_rsp); + tport->max_payload_size = + MIN(max_payload_size, iport->max_payload_size); + + if (tport->max_payload_size < FNIC_MIN_DATA_FIELD_SIZE) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "MFS: tport max frame size below spec bounds: %d", + tport->max_payload_size); + tport->max_payload_size = FNIC_MIN_DATA_FIELD_SIZE; + } + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "MAX frame size: %d iport max_payload_size: %d tport mfs: %d", + max_payload_size, iport->max_payload_size, + tport->max_payload_size); + + tport->max_concur_seqs = FNIC_FC_PLOGI_RSP_CONCUR_SEQ(plogi_rsp); + + tport->retry_counter = 0; + fdls_set_tport_state(tport, FDLS_TGT_STATE_PRLI); + fdls_send_tgt_prli(iport, tport); +} + +static void +fdls_process_tgt_prli_rsp(struct fnic_iport_s *iport, + struct fc_hdr_s *fchdr) +{ + uint32_t tgt_fcid; + struct fnic_tport_s *tport; + uint8_t *fcid; + uint16_t oxid; + struct fc_els_prli_s *prli_rsp = (struct fc_els_prli_s *) fchdr; + struct fc_els_reject_s *els_rjt = (struct fc_els_reject_s *) fchdr; + struct fnic_tport_event_s *tport_add_evt; + struct fnic *fnic = iport->fnic; + bool mismatched_tgt = false; + + fcid = FNIC_GET_S_ID(fchdr); + tgt_fcid = ntoh24(fcid); + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "FDLS process tgt PRLI response: 0x%x", tgt_fcid); + + tport = fnic_find_tport_by_fcid(iport, tgt_fcid); + if (!tport) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "tport not found: 0x%x", tgt_fcid); + /* Handle or just drop? */ + return; + } + + if ((iport->state != FNIC_IPORT_STATE_READY) + || (tport->flags & FNIC_FDLS_TGT_ABORT_ISSUED)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Dropping frame! iport st: %d tport st: %d tport fcid: 0x%x", + iport->state, tport->state, tport->fcid); + return; + } + + if (tport->state != FDLS_TGT_STATE_PRLI) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "PRLI rsp recvd in wrong state. Restarting nexus"); + oxid = ntohs(FNIC_GET_OX_ID(fchdr)); + fdls_free_tgt_oxid(iport, oxid); + fdls_target_restart_nexus(tport); + return; + } + + if (ntohs(fchdr->ox_id) != ntohs(tport->oxid_used)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Dropping PRLI response from target: 0x%x ", + tgt_fcid); + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Reason: Stale PRLI response/Aborted PDISC/OOO frame delivery"); + return; + } + + switch (prli_rsp->command) { + case ELS_LS_ACC: + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "PRLI accepted from target: 0x%x", tgt_fcid); + oxid = ntohs(FNIC_GET_OX_ID(fchdr)); + fdls_free_tgt_oxid(iport, oxid); + + if (prli_rsp->sp.type != FC_FC4_TYPE_SCSI) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "mismatched target zoned with FC SCSI initiator: 0x%x", + tgt_fcid); + mismatched_tgt = true; + } + if (mismatched_tgt) { + fdls_tgt_logout(iport, tport); + fdls_delete_tport(iport, tport); return; } - /* RPN have timed out send abts */ - if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) - fdls_send_fabric_abts(iport); - else - /* ABTS has timed out (2*ra_tov) */ - fnic_fdls_start_plogi(iport); /* go back to fabric Plogi */ break; - case FDLS_STATE_SCR: - /* scr received a LS_RJT with busy we retry from here */ - if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME) - && (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) { - iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME; - fdls_send_scr(iport); - spin_unlock_irqrestore(&fnic->fnic_lock, flags); - return; - } - /* scr have timed out send abts */ - if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) - fdls_send_fabric_abts(iport); - else { - /* ABTS has timed out (2*ra_tov), we give up */ + + case ELS_LS_RJT: + if (((els_rjt->reason_code == FC_ELS_RJT_LOGICAL_BUSY) + || (els_rjt->reason_code == FC_ELS_RJT_BUSY)) + && (tport->retry_counter < FDLS_RETRY_COUNT)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, - "ABTS timed out. Starting PLOGI: %p", iport); - fnic_fdls_start_plogi(iport); - } - break; - case FDLS_STATE_REGISTER_FC4_TYPES: - /* scr received a LS_RJT with busy we retry from here */ - if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME) - && (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) { - iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME; - fdls_send_register_fc4_types(iport); - spin_unlock_irqrestore(&fnic->fnic_lock, flags); + "PRLI ret ELS_LS_RJT BUSY. Retry from timer routine: 0x%x", + tgt_fcid); + + /*Retry Plogi again from the timer routine. */ + tport->flags |= FNIC_FDLS_RETRY_FRAME; return; - } - /* RFT_ID timed out send abts */ - if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) { - fdls_send_fabric_abts(iport); } else { - /* ABTS has timed out (2*ra_tov), we give up */ - FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, - "ABTS timed out. Starting PLOGI: %p", iport); - fnic_fdls_start_plogi(iport); /* go back to fabric Plogi */ - } - break; - case FDLS_STATE_REGISTER_FC4_FEATURES: - /* scr received a LS_RJT with busy we retry from here */ - if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME) - && (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) { - iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME; - fdls_send_register_fc4_features(iport); - spin_unlock_irqrestore(&fnic->fnic_lock, flags); - return; - } - /* scr have timed out send abts */ - if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) - fdls_send_fabric_abts(iport); - else { - /* ABTS has timed out (2*ra_tov), we give up */ FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, - "ABTS timed out. Starting PLOGI %p", iport); - fnic_fdls_start_plogi(iport); /* go back to fabric Plogi */ - } - break; - case FDLS_STATE_RSCN_GPN_FT: - case FDLS_STATE_SEND_GPNFT: - case FDLS_STATE_GPN_FT: - /* GPN_FT received a LS_RJT with busy we retry from here */ - if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME) - && (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) { - iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME; - fdls_send_gpn_ft(iport, iport->fabric.state); - spin_unlock_irqrestore(&fnic->fnic_lock, flags); + "PRLI returned ELS_LS_RJT from target: 0x%x", + tgt_fcid); + + oxid = ntohs(fchdr->ox_id); + fdls_free_tgt_oxid(iport, oxid); + fdls_tgt_logout(iport, tport); + fdls_delete_tport(iport, tport); return; } - /* gpn_gt have timed out send abts */ - if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) { - fdls_send_fabric_abts(iport); - } else { - /* - * ABTS has timed out have waited (2*ra_tov) can - * retry safely with same exchange id - */ - if (iport->fabric.retry_counter < FDLS_RETRY_COUNT) { - fdls_send_gpn_ft(iport, iport->fabric.state); - } else { - FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, - "ABTS timeout for fabric GPN_FT. Check name server: %p", - iport); - } - } break; + default: + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "PRLI not accepted from target: 0x%x", tgt_fcid); + return; break; } - spin_unlock_irqrestore(&fnic->fnic_lock, flags); -} -static void fnic_fdls_start_flogi(struct fnic_iport_s *iport) -{ - iport->fabric.retry_counter = 0; - fdls_send_fabric_flogi(iport); - fdls_set_state((&iport->fabric), FDLS_STATE_FABRIC_FLOGI); - iport->fabric.flags = 0; -} + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Found the PRLI target: 0x%x and state: %d", + (unsigned int) tgt_fcid, tport->state); -static void fnic_fdls_start_plogi(struct fnic_iport_s *iport) -{ - iport->fabric.retry_counter = 0; - fdls_send_fabric_plogi(iport); - fdls_set_state((&iport->fabric), FDLS_STATE_FABRIC_PLOGI); - iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED; + if (tport->timer_pending) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "tport fcid 0x%x: Canceling disc timer\n", + tport->fcid); + fnic_del_tport_timer_sync(fnic, tport); + } + tport->timer_pending = 0; + + oxid = ntohs(FNIC_GET_OX_ID(fchdr)); + fdls_free_tgt_oxid(iport, oxid); + + /* Learn Service Params */ + tport->fcp_csp = ntohl(prli_rsp->sp.csp); + tport->retry_counter = 0; + + if (prli_rsp->sp.csp & FCP_SPPF_RETRY) + tport->tgt_flags |= FNIC_FC_RP_FLAGS_RETRY; + + /* Check if the device plays Target Mode Function */ + if (!(tport->fcp_csp & FCP_PRLI_FUNC_TARGET)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Remote port(0x%x): no target support. Deleting it\n", + tgt_fcid); + fdls_tgt_logout(iport, tport); + fdls_delete_tport(iport, tport); + return; + } + + fdls_set_tport_state(tport, FDLS_TGT_STATE_READY); + + /* Inform the driver about new target added */ + tport_add_evt = kzalloc(sizeof(struct fnic_tport_event_s), GFP_ATOMIC); + if (!tport_add_evt) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "tport event memory allocation failure: 0x%0x\n", + tport->fcid); + return; + } + tport_add_evt->event = TGT_EV_RPORT_ADD; + tport_add_evt->arg1 = (void *) tport; + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "iport fcid: 0x%x add tport event fcid: 0x%x\n", + tport->fcid, iport->fcid); + list_add_tail(&tport_add_evt->links, &fnic->tport_event_list); + queue_work(fnic_event_queue, &fnic->tport_work); } + static void fdls_process_rff_id_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr) { @@ -892,6 +1886,106 @@ fdls_process_scr_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr) } } +static void +fdls_process_gpn_ft_tgt_list(struct fnic_iport_s *iport, + struct fc_hdr_s *fchdr, int len) +{ + struct fc_gpn_ft_rsp_iu_s *gpn_ft_tgt; + struct fc_gpn_ft_rsp_iu_s *gpn_ft_tgt_rem; + struct fnic_tport_s *tport, *next; + uint32_t fcid; + uint64_t wwpn; + int rem_len = len; + u32 old_link_down_cnt = iport->fnic->link_down_cnt; + struct fnic *fnic = iport->fnic; + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "0x%x: FDLS process GPN_FT tgt list", iport->fcid); + + gpn_ft_tgt = + (struct fc_gpn_ft_rsp_iu_s *) ((uint8_t *) fchdr + + sizeof(struct fc_hdr_s) + + sizeof(struct fc_ct_hdr_s)); + gpn_ft_tgt_rem = gpn_ft_tgt; + len -= sizeof(struct fc_hdr_s) + sizeof(struct fc_ct_hdr_s); + + while (rem_len > 0) { + + fcid = ntoh24(gpn_ft_tgt->fcid); + wwpn = ntohll(gpn_ft_tgt->wwpn); + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "tport: 0x%x: ctrl:0x%x", fcid, gpn_ft_tgt->ctrl); + + if (fcid == iport->fcid) { + if (gpn_ft_tgt->ctrl & FNIC_FC_GPN_LAST_ENTRY) + break; + gpn_ft_tgt++; + rem_len -= sizeof(struct fc_gpn_ft_rsp_iu_s); + continue; + } + + tport = fnic_find_tport_by_wwpn(iport, wwpn); + if (!tport) { + /* + * New port registered with the switch or first time query + */ + tport = fdls_create_tport(iport, fcid, wwpn); + if (!tport) + return; + } + /* + * check if this was an existing tport with same fcid + * but whose wwpn has changed now ,then remove it and + * create a new one + */ + if (tport->fcid != fcid) { + fdls_delete_tport(iport, tport); + tport = fdls_create_tport(iport, fcid, wwpn); + if (!tport) + return; + } + + /* + * If this GPN_FT rsp is after RSCN then mark the tports which + * matches with the new GPN_FT list, if some tport is not + * found in GPN_FT we went to delete that tport later. + */ + if (fdls_get_state((&iport->fabric)) == FDLS_STATE_RSCN_GPN_FT) + tport->flags |= FNIC_FDLS_TPORT_IN_GPN_FT_LIST; + + if (gpn_ft_tgt->ctrl & FNIC_FC_GPN_LAST_ENTRY) + break; + + gpn_ft_tgt++; + rem_len -= sizeof(struct fc_gpn_ft_rsp_iu_s); + } + if (rem_len <= 0) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "GPN_FT response: malformed/corrupt frame rxlen: %d remlen: %d", + len, rem_len); + } + + /*remove those ports which was not listed in GPN_FT */ + if (fdls_get_state((&iport->fabric)) == FDLS_STATE_RSCN_GPN_FT) { + list_for_each_entry_safe(tport, next, &iport->tport_list, links) { + + if (!(tport->flags & FNIC_FDLS_TPORT_IN_GPN_FT_LIST)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Remove port: 0x%x not found in GPN_FT list", + tport->fcid); + fdls_delete_tport(iport, tport); + } else { + tport->flags &= ~FNIC_FDLS_TPORT_IN_GPN_FT_LIST; + } + if ((old_link_down_cnt != iport->fnic->link_down_cnt) + || (iport->state != FNIC_IPORT_STATE_READY)) { + return; + } + } + } +} + static void fdls_process_gpn_ft_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr, int len) @@ -900,6 +1994,9 @@ fdls_process_gpn_ft_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr, struct fc_gpn_ft_s *gpn_ft_rsp = (struct fc_gpn_ft_s *) fchdr; uint16_t rsp; uint8_t reason_code; + int count = 0; + struct fnic_tport_s *tport, *next; + u32 old_link_down_cnt = iport->fnic->link_down_cnt; struct fnic *fnic = iport->fnic; FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, @@ -936,12 +2033,74 @@ fdls_process_gpn_ft_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr, case FC_CT_ACC: FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, "0x%x: GPNFT_RSP accept", iport->fcid); + if (iport->fabric.timer_pending) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "0x%x: Canceling fabric disc timer\n", + iport->fcid); + fnic_del_fabric_timer_sync(fnic); + } + iport->fabric.timer_pending = 0; + iport->fabric.retry_counter = 0; + fdls_process_gpn_ft_tgt_list(iport, fchdr, len); + + /* + * iport state can change only if link down event happened + * We don't need to undo fdls_process_gpn_ft_tgt_list, + * that will be taken care in next link up event + */ + if (iport->state != FNIC_IPORT_STATE_READY) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Halting target discovery: fab st: %d iport st: %d ", + fdls_get_state(fdls), iport->state); + break; + } + fdls_tgt_discovery_start(iport); break; case FC_CT_REJ: reason_code = gpn_ft_rsp->fc_ct_hdr.reason_code; FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, "0x%x: GPNFT_RSP Reject", iport->fcid); + + if (((reason_code == FC_CT_RJT_LOGICAL_BUSY) + || (reason_code == FC_CT_RJT_BUSY)) + && (fdls->retry_counter < FDLS_RETRY_COUNT)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "0x%x: GPNFT_RSP ret REJ/BSY. Retry from timer routine", + iport->fcid); + /* Retry again from the timer routine */ + fdls->flags |= FNIC_FDLS_RETRY_FRAME; + } else { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "0x%x: GPNFT_RSP reject", iport->fcid); + if (iport->fabric.timer_pending) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "0x%x: Canceling fabric disc timer\n", + iport->fcid); + fnic_del_fabric_timer_sync(fnic); + } + iport->fabric.timer_pending = 0; + iport->fabric.retry_counter = 0; + /* + * If GPN_FT ls_rjt then we should delete + * all existing tports + */ + count = 0; + list_for_each_entry_safe(tport, next, &iport->tport_list, + links) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "GPN_FT_REJECT: Remove port: 0x%x", + tport->fcid); + fdls_delete_tport(iport, tport); + if ((old_link_down_cnt != iport->fnic->link_down_cnt) + || (iport->state != FNIC_IPORT_STATE_READY)) { + return; + } + count++; + } + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "GPN_FT_REJECT: Removed (0x%x) ports", count); + } break; default: @@ -1342,6 +2501,141 @@ fdls_process_fabric_abts_rsp(struct fnic_iport_s *iport, } } +static void +fdls_process_tgt_abts_rsp(struct fnic_iport_s *iport, + struct fc_hdr_s *fchdr) +{ + uint32_t s_id; + struct fnic_tport_s *tport; + uint32_t tport_state; + struct fc_abts_ba_acc_s *ba_acc; + struct fc_abts_ba_rjt_s *ba_rjt; + uint16_t oxid; + struct fnic *fnic = iport->fnic; + + s_id = ntoh24(fchdr->sid); + ba_acc = (struct fc_abts_ba_acc_s *) fchdr; + ba_rjt = (struct fc_abts_ba_rjt_s *) fchdr; + + tport = fnic_find_tport_by_fcid(iport, s_id); + if (!tport) { + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, + "Received tgt abts rsp with invalid SID: 0x%x", s_id); + return; + } + + if (tport->timer_pending) { + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, + "tport 0x%p Canceling fabric disc timer\n", tport); + fnic_del_tport_timer_sync(fnic, tport); + } + if (iport->state != FNIC_IPORT_STATE_READY) { + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, + "Received tgt abts rsp in iport state(%d). Dropping.", + iport->state); + return; + } + tport->timer_pending = 0; + tport->flags &= ~FNIC_FDLS_TGT_ABORT_ISSUED; + tport_state = tport->state; + oxid = ntohs(fchdr->ox_id); + + /*This abort rsp is for ADISC */ + if ((oxid >= FDLS_ADISC_OXID_BASE) && (oxid < FDLS_TGT_OXID_POOL_END)) { + if (fchdr->r_ctl == FNIC_BA_ACC_RCTL) { + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, + "Received tgt ADISC abts response BA_ACC for OX_ID: 0x%x tgt_fcid: 0x%x", + ba_acc->ox_id, tport->fcid); + } else if (fchdr->r_ctl == FNIC_BA_RJT_RCTL) { + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, + "ADISC BA_RJT rcvd tport_fcid: 0x%x tport_state: %d ", + tport->fcid, tport_state); + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, + "reason code: 0x%x reason code explanation:0x%x ", + ba_rjt->reason_code, ba_rjt->reason_explanation); + } + if ((tport->retry_counter < FDLS_RETRY_COUNT) + && (fchdr->r_ctl == FNIC_BA_ACC_RCTL)) { + fdls_free_tgt_oxid(iport, oxid); + fdls_send_tgt_adisc(iport, tport); + return; + } + fdls_free_tgt_oxid(iport, oxid); + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, + "ADISC not responding. Deleting target port: 0x%x", + tport->fcid); + fdls_delete_tport(iport, tport); + if ((iport->state == FNIC_IPORT_STATE_READY) + && (iport->fabric.state != FDLS_STATE_SEND_GPNFT) + && (iport->fabric.state != FDLS_STATE_RSCN_GPN_FT)) { + fdls_send_gpn_ft(iport, FDLS_STATE_SEND_GPNFT); + } + /*Restart a discovery of targets */ + return; + } + + /*This abort rsp is for PLOGI */ + if ((oxid >= FDLS_PLOGI_OXID_BASE) && (oxid < FDLS_PRLI_OXID_BASE)) { + if (fchdr->r_ctl == FNIC_BA_ACC_RCTL) { + FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, + "Received tgt PLOGI abts response BA_ACC tgt_fcid: 0x%x", + tport->fcid); + } else if (fchdr->r_ctl == FNIC_BA_RJT_RCTL) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "PLOGI BA_RJT received for tport_fcid: 0x%x OX_ID: 0x%x", + tport->fcid, fchdr->ox_id); + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "reason code: 0x%x reason code explanation: 0x%x", + ba_rjt->reason_code, ba_rjt->reason_explanation); + } + if ((tport->retry_counter < iport->max_plogi_retries) + && (fchdr->r_ctl == FNIC_BA_ACC_RCTL)) { + fdls_free_tgt_oxid(iport, oxid); + fdls_send_tgt_plogi(iport, tport); + return; + } + fdls_free_tgt_oxid(iport, oxid); + fdls_delete_tport(iport, tport); + /*Restart a discovery of targets */ + if ((iport->state == FNIC_IPORT_STATE_READY) + && (iport->fabric.state != FDLS_STATE_SEND_GPNFT) + && (iport->fabric.state != FDLS_STATE_RSCN_GPN_FT)) { + fdls_send_gpn_ft(iport, FDLS_STATE_SEND_GPNFT); + } + return; + } + + /*This abort rsp is for PRLI */ + if ((oxid >= FDLS_PRLI_OXID_BASE) && (oxid < FDLS_ADISC_OXID_BASE)) { + if (fchdr->r_ctl == FNIC_BA_ACC_RCTL) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "0x%x: Received tgt PRLI abts response BA_ACC", + tport->fcid); + } else if (fchdr->r_ctl == FNIC_BA_RJT_RCTL) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "PRLI BA_RJT received for tport_fcid: 0x%x OX_ID: 0x%x ", + tport->fcid, fchdr->ox_id); + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "reason code: 0x%x reason code explanation: 0x%x", + ba_rjt->reason_code, + ba_rjt->reason_explanation); + } + if ((tport->retry_counter < FDLS_RETRY_COUNT) + && (fchdr->r_ctl == FNIC_BA_ACC_RCTL)) { + fdls_free_tgt_oxid(iport, oxid); + fdls_send_tgt_prli(iport, tport); + return; + } + fdls_free_tgt_oxid(iport, oxid); + fdls_send_tgt_plogi(iport, tport); /* go back to plogi */ + fdls_set_tport_state(tport, FDLS_TGT_STATE_PLOGI); + return; + } + + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Received ABTS response for unknown frame %p", iport); +} + /* * Performs a validation for all FCOE frames and return the frame type */ @@ -1434,6 +2728,42 @@ fnic_fdls_validate_and_get_frame_type(struct fnic_iport_s *iport, } } + /* ELS response from a target */ + if ((ntohs(oxid) >= FDLS_PLOGI_OXID_BASE) + && (ntohs(oxid) < FDLS_PRLI_OXID_BASE)) { + if (!FNIC_FC_FRAME_TYPE_ELS(fchdr)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Dropping Unknown frame in PLOGI exchange range type: 0x%x.", + fchdr->type); + return -1; + } + return FNIC_TPORT_PLOGI_RSP; + } + if ((ntohs(oxid) >= FDLS_PRLI_OXID_BASE) + && (ntohs(oxid) < FDLS_ADISC_OXID_BASE)) { + if (!FNIC_FC_FRAME_TYPE_ELS(fchdr)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Dropping Unknown frame in PRLI exchange range type: 0x%x.", + fchdr->type); + return -1; + } + return FNIC_TPORT_PRLI_RSP; + } + + if ((ntohs(oxid) >= FDLS_ADISC_OXID_BASE) + && (ntohs(oxid) < FDLS_TGT_OXID_POOL_END)) { + if (!FNIC_FC_FRAME_TYPE_ELS(fchdr)) { + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Dropping Unknown frame in ADISC exchange range type: 0x%x.", + fchdr->type); + return -1; + } + return FNIC_TPORT_ADISC_RSP; + } + if (ntohs(oxid) == FNIC_TLOGO_REQ_OXID) { + return FNIC_TPORT_LOGO_RSP; + } + /*response from fabric */ switch (oxid) { @@ -1557,6 +2887,21 @@ void fnic_fdls_recv_frame(struct fnic_iport_s *iport, void *rx_frame, case FNIC_FABRIC_GPN_FT_RSP: fdls_process_gpn_ft_rsp(iport, fchdr, len); break; + case FNIC_TPORT_PLOGI_RSP: + fdls_process_tgt_plogi_rsp(iport, fchdr); + break; + case FNIC_TPORT_PRLI_RSP: + fdls_process_tgt_prli_rsp(iport, fchdr); + break; + case FNIC_TPORT_ADISC_RSP: + fdls_process_tgt_adisc_rsp(iport, fchdr); + break; + case FNIC_TPORT_LOGO_RSP: + /* Logo response from tgt which we have deleted */ + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, + "Logo response from tgt: 0x%x", + ntoh24(fchdr->sid)); + break; case FNIC_FABRIC_LOGO_RSP: fdls_process_fabric_logo_rsp(iport, fchdr); break; @@ -1566,7 +2911,8 @@ void fnic_fdls_recv_frame(struct fnic_iport_s *iport, void *rx_frame, if ((iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED) && (oxid >= FNIC_FLOGI_OXID && oxid <= FNIC_RFF_REQ_OXID)) { fdls_process_fabric_abts_rsp(iport, fchdr); - } + } else + fdls_process_tgt_abts_rsp(iport, fchdr); break; default: FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, diff --git a/drivers/scsi/fnic/fnic.h b/drivers/scsi/fnic/fnic.h index 2d5f438f2cc4..92cd17efa40f 100644 --- a/drivers/scsi/fnic/fnic.h +++ b/drivers/scsi/fnic/fnic.h @@ -79,6 +79,9 @@ #define IS_FNIC_FCP_INITIATOR(fnic) (fnic->role == FNIC_ROLE_FCP_INITIATOR) +/* Retry supported by rport (returned by PRLI service parameters) */ +#define FNIC_FC_RP_FLAGS_RETRY 0x1 + /* * fnic private data per SCSI command. * These fields are locked by the hashed io_req_lock. @@ -133,6 +136,7 @@ static inline u64 fnic_flags_and_state(struct scsi_cmnd *cmd) extern unsigned int fnic_log_level; extern unsigned int io_completions; +extern struct workqueue_struct *fnic_event_queue; #define FNIC_MAIN_LOGGING 0x01 #define FNIC_FCS_LOGGING 0x02 @@ -329,6 +333,8 @@ struct fnic { struct work_struct flush_work; struct sk_buff_head frame_queue; struct list_head tx_queue; + struct work_struct tport_work; + struct list_head tport_event_list; /*** FIP related data members -- start ***/ void (*set_vlan)(struct fnic *, u16 vlan); diff --git a/drivers/scsi/fnic/fnic_fdls.h b/drivers/scsi/fnic/fnic_fdls.h index f64a2ba2e10d..bb3e9d26c18a 100644 --- a/drivers/scsi/fnic/fnic_fdls.h +++ b/drivers/scsi/fnic/fnic_fdls.h @@ -312,6 +312,10 @@ void fdls_send_fabric_logo(struct fnic_iport_s *iport); int fnic_fdls_validate_and_get_frame_type(struct fnic_iport_s *iport, void *rx_frame, int len, int fchdr_offset); +void fdls_send_tport_abts(struct fnic_iport_s *iport, + struct fnic_tport_s *tport); +void fdls_delete_tport(struct fnic_iport_s *iport, + struct fnic_tport_s *tport); void fdls_fdmi_timer_callback(struct timer_list *t); /* fnic_fcs.c */