| /** |
| * Copyright (C) 2005 - 2010 ServerEngines |
| * All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License version 2 |
| * as published by the Free Software Foundation. The full GNU General |
| * Public License is included in this distribution in the file called COPYING. |
| * |
| * Written by: Jayamohan Kallickal (jayamohank@serverengines.com) |
| * |
| * Contact Information: |
| * linux-drivers@serverengines.com |
| * |
| * ServerEngines |
| * 209 N. Fair Oaks Ave |
| * Sunnyvale, CA 94085 |
| * |
| */ |
| |
| #include <scsi/libiscsi.h> |
| #include <scsi/scsi_transport_iscsi.h> |
| #include <scsi/scsi_transport.h> |
| #include <scsi/scsi_cmnd.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_host.h> |
| #include <scsi/scsi.h> |
| |
| #include "be_iscsi.h" |
| |
| extern struct iscsi_transport beiscsi_iscsi_transport; |
| |
| /** |
| * beiscsi_session_create - creates a new iscsi session |
| * @cmds_max: max commands supported |
| * @qdepth: max queue depth supported |
| * @initial_cmdsn: initial iscsi CMDSN |
| */ |
| struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep, |
| u16 cmds_max, |
| u16 qdepth, |
| u32 initial_cmdsn) |
| { |
| struct Scsi_Host *shost; |
| struct beiscsi_endpoint *beiscsi_ep; |
| struct iscsi_cls_session *cls_session; |
| struct beiscsi_hba *phba; |
| struct iscsi_session *sess; |
| struct beiscsi_session *beiscsi_sess; |
| struct beiscsi_io_task *io_task; |
| |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_session_create\n"); |
| |
| if (!ep) { |
| SE_DEBUG(DBG_LVL_1, "beiscsi_session_create: invalid ep \n"); |
| return NULL; |
| } |
| beiscsi_ep = ep->dd_data; |
| phba = beiscsi_ep->phba; |
| shost = phba->shost; |
| if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) { |
| shost_printk(KERN_ERR, shost, "Cannot handle %d cmds." |
| "Max cmds per session supported is %d. Using %d. " |
| "\n", cmds_max, |
| beiscsi_ep->phba->params.wrbs_per_cxn, |
| beiscsi_ep->phba->params.wrbs_per_cxn); |
| cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn; |
| } |
| |
| cls_session = iscsi_session_setup(&beiscsi_iscsi_transport, |
| shost, cmds_max, |
| sizeof(*beiscsi_sess), |
| sizeof(*io_task), |
| initial_cmdsn, ISCSI_MAX_TARGET); |
| if (!cls_session) |
| return NULL; |
| sess = cls_session->dd_data; |
| beiscsi_sess = sess->dd_data; |
| beiscsi_sess->bhs_pool = pci_pool_create("beiscsi_bhs_pool", |
| phba->pcidev, |
| sizeof(struct be_cmd_bhs), |
| 64, 0); |
| if (!beiscsi_sess->bhs_pool) |
| goto destroy_sess; |
| |
| return cls_session; |
| destroy_sess: |
| iscsi_session_teardown(cls_session); |
| return NULL; |
| } |
| |
| /** |
| * beiscsi_session_destroy - destroys iscsi session |
| * @cls_session: pointer to iscsi cls session |
| * |
| * Destroys iSCSI session instance and releases |
| * resources allocated for it. |
| */ |
| void beiscsi_session_destroy(struct iscsi_cls_session *cls_session) |
| { |
| struct iscsi_session *sess = cls_session->dd_data; |
| struct beiscsi_session *beiscsi_sess = sess->dd_data; |
| |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_session_destroy\n"); |
| pci_pool_destroy(beiscsi_sess->bhs_pool); |
| iscsi_session_teardown(cls_session); |
| } |
| |
| /** |
| * beiscsi_conn_create - create an instance of iscsi connection |
| * @cls_session: ptr to iscsi_cls_session |
| * @cid: iscsi cid |
| */ |
| struct iscsi_cls_conn * |
| beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid) |
| { |
| struct beiscsi_hba *phba; |
| struct Scsi_Host *shost; |
| struct iscsi_cls_conn *cls_conn; |
| struct beiscsi_conn *beiscsi_conn; |
| struct iscsi_conn *conn; |
| struct iscsi_session *sess; |
| struct beiscsi_session *beiscsi_sess; |
| |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_create ,cid" |
| "from iscsi layer=%d\n", cid); |
| shost = iscsi_session_to_shost(cls_session); |
| phba = iscsi_host_priv(shost); |
| |
| cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid); |
| if (!cls_conn) |
| return NULL; |
| |
| conn = cls_conn->dd_data; |
| beiscsi_conn = conn->dd_data; |
| beiscsi_conn->ep = NULL; |
| beiscsi_conn->phba = phba; |
| beiscsi_conn->conn = conn; |
| sess = cls_session->dd_data; |
| beiscsi_sess = sess->dd_data; |
| beiscsi_conn->beiscsi_sess = beiscsi_sess; |
| return cls_conn; |
| } |
| |
| /** |
| * beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table |
| * @beiscsi_conn: The pointer to beiscsi_conn structure |
| * @phba: The phba instance |
| * @cid: The cid to free |
| */ |
| static int beiscsi_bindconn_cid(struct beiscsi_hba *phba, |
| struct beiscsi_conn *beiscsi_conn, |
| unsigned int cid) |
| { |
| if (phba->conn_table[cid]) { |
| SE_DEBUG(DBG_LVL_1, |
| "Connection table already occupied. Detected clash\n"); |
| return -EINVAL; |
| } else { |
| SE_DEBUG(DBG_LVL_8, "phba->conn_table[%d]=%p(beiscsi_conn) \n", |
| cid, beiscsi_conn); |
| phba->conn_table[cid] = beiscsi_conn; |
| } |
| return 0; |
| } |
| |
| /** |
| * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection |
| * @cls_session: pointer to iscsi cls session |
| * @cls_conn: pointer to iscsi cls conn |
| * @transport_fd: EP handle(64 bit) |
| * |
| * This function binds the TCP Conn with iSCSI Connection and Session. |
| */ |
| int beiscsi_conn_bind(struct iscsi_cls_session *cls_session, |
| struct iscsi_cls_conn *cls_conn, |
| u64 transport_fd, int is_leading) |
| { |
| struct iscsi_conn *conn = cls_conn->dd_data; |
| struct beiscsi_conn *beiscsi_conn = conn->dd_data; |
| struct Scsi_Host *shost = |
| (struct Scsi_Host *)iscsi_session_to_shost(cls_session); |
| struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost); |
| struct beiscsi_endpoint *beiscsi_ep; |
| struct iscsi_endpoint *ep; |
| |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_bind\n"); |
| ep = iscsi_lookup_endpoint(transport_fd); |
| if (!ep) |
| return -EINVAL; |
| |
| beiscsi_ep = ep->dd_data; |
| |
| if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) |
| return -EINVAL; |
| |
| if (beiscsi_ep->phba != phba) { |
| SE_DEBUG(DBG_LVL_8, |
| "beiscsi_ep->hba=%p not equal to phba=%p \n", |
| beiscsi_ep->phba, phba); |
| return -EEXIST; |
| } |
| |
| beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid; |
| beiscsi_conn->ep = beiscsi_ep; |
| beiscsi_ep->conn = beiscsi_conn; |
| SE_DEBUG(DBG_LVL_8, "beiscsi_conn=%p conn=%p ep_cid=%d \n", |
| beiscsi_conn, conn, beiscsi_ep->ep_cid); |
| return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid); |
| } |
| |
| /** |
| * beiscsi_conn_get_param - get the iscsi parameter |
| * @cls_conn: pointer to iscsi cls conn |
| * @param: parameter type identifier |
| * @buf: buffer pointer |
| * |
| * returns iscsi parameter |
| */ |
| int beiscsi_conn_get_param(struct iscsi_cls_conn *cls_conn, |
| enum iscsi_param param, char *buf) |
| { |
| struct beiscsi_endpoint *beiscsi_ep; |
| struct iscsi_conn *conn = cls_conn->dd_data; |
| struct beiscsi_conn *beiscsi_conn = conn->dd_data; |
| int len = 0; |
| |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_param, param= %d\n", param); |
| beiscsi_ep = beiscsi_conn->ep; |
| if (!beiscsi_ep) { |
| SE_DEBUG(DBG_LVL_1, |
| "In beiscsi_conn_get_param , no beiscsi_ep\n"); |
| return -1; |
| } |
| |
| switch (param) { |
| case ISCSI_PARAM_CONN_PORT: |
| len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport); |
| break; |
| case ISCSI_PARAM_CONN_ADDRESS: |
| if (beiscsi_ep->ip_type == BE2_IPV4) |
| len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr); |
| else |
| len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr); |
| break; |
| default: |
| return iscsi_conn_get_param(cls_conn, param, buf); |
| } |
| return len; |
| } |
| |
| int beiscsi_set_param(struct iscsi_cls_conn *cls_conn, |
| enum iscsi_param param, char *buf, int buflen) |
| { |
| struct iscsi_conn *conn = cls_conn->dd_data; |
| struct iscsi_session *session = conn->session; |
| int ret; |
| |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_set_param, param= %d\n", param); |
| ret = iscsi_set_param(cls_conn, param, buf, buflen); |
| if (ret) |
| return ret; |
| /* |
| * If userspace tried to set the value to higher than we can |
| * support override here. |
| */ |
| switch (param) { |
| case ISCSI_PARAM_FIRST_BURST: |
| if (session->first_burst > 8192) |
| session->first_burst = 8192; |
| break; |
| case ISCSI_PARAM_MAX_RECV_DLENGTH: |
| if (conn->max_recv_dlength > 65536) |
| conn->max_recv_dlength = 65536; |
| break; |
| case ISCSI_PARAM_MAX_BURST: |
| if (session->max_burst > 262144) |
| session->max_burst = 262144; |
| break; |
| default: |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * beiscsi_get_host_param - get the iscsi parameter |
| * @shost: pointer to scsi_host structure |
| * @param: parameter type identifier |
| * @buf: buffer pointer |
| * |
| * returns host parameter |
| */ |
| int beiscsi_get_host_param(struct Scsi_Host *shost, |
| enum iscsi_host_param param, char *buf) |
| { |
| struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost); |
| struct be_cmd_resp_get_mac_addr *resp; |
| struct be_mcc_wrb *wrb; |
| unsigned int tag, wrb_num; |
| int len = 0; |
| unsigned short status, extd_status; |
| struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q; |
| |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param); |
| switch (param) { |
| case ISCSI_HOST_PARAM_HWADDRESS: |
| tag = be_cmd_get_mac_addr(phba); |
| if (!tag) { |
| SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed \n"); |
| return -1; |
| } else |
| wait_event_interruptible(phba->ctrl.mcc_wait[tag], |
| phba->ctrl.mcc_numtag[tag]); |
| |
| wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16; |
| extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8; |
| status = phba->ctrl.mcc_numtag[tag] & 0x000000FF; |
| if (status || extd_status) { |
| SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed" |
| " status = %d extd_status = %d \n", |
| status, extd_status); |
| free_mcc_tag(&phba->ctrl, tag); |
| return -1; |
| } else { |
| wrb = queue_get_wrb(mccq, wrb_num); |
| free_mcc_tag(&phba->ctrl, tag); |
| resp = embedded_payload(wrb); |
| memcpy(phba->mac_address, resp->mac_address, ETH_ALEN); |
| len = sysfs_format_mac(buf, phba->mac_address, |
| ETH_ALEN); |
| } |
| break; |
| default: |
| return iscsi_host_get_param(shost, param, buf); |
| } |
| return len; |
| } |
| |
| /** |
| * beiscsi_conn_get_stats - get the iscsi stats |
| * @cls_conn: pointer to iscsi cls conn |
| * @stats: pointer to iscsi_stats structure |
| * |
| * returns iscsi stats |
| */ |
| void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, |
| struct iscsi_stats *stats) |
| { |
| struct iscsi_conn *conn = cls_conn->dd_data; |
| |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n"); |
| stats->txdata_octets = conn->txdata_octets; |
| stats->rxdata_octets = conn->rxdata_octets; |
| stats->dataout_pdus = conn->dataout_pdus_cnt; |
| stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; |
| stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; |
| stats->datain_pdus = conn->datain_pdus_cnt; |
| stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; |
| stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; |
| stats->r2t_pdus = conn->r2t_pdus_cnt; |
| stats->digest_err = 0; |
| stats->timeout_err = 0; |
| stats->custom_length = 0; |
| strcpy(stats->custom[0].desc, "eh_abort_cnt"); |
| stats->custom[0].value = conn->eh_abort_cnt; |
| } |
| |
| /** |
| * beiscsi_set_params_for_offld - get the parameters for offload |
| * @beiscsi_conn: pointer to beiscsi_conn |
| * @params: pointer to offload_params structure |
| */ |
| static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn, |
| struct beiscsi_offload_params *params) |
| { |
| struct iscsi_conn *conn = beiscsi_conn->conn; |
| struct iscsi_session *session = conn->session; |
| |
| AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length, |
| params, session->max_burst); |
| AMAP_SET_BITS(struct amap_beiscsi_offload_params, |
| max_send_data_segment_length, params, |
| conn->max_xmit_dlength); |
| AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length, |
| params, session->first_burst); |
| AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params, |
| session->erl); |
| AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params, |
| conn->datadgst_en); |
| AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params, |
| conn->hdrdgst_en); |
| AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params, |
| session->initial_r2t_en); |
| AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params, |
| session->imm_data_en); |
| AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params, |
| (conn->exp_statsn - 1)); |
| } |
| |
| /** |
| * beiscsi_conn_start - offload of session to chip |
| * @cls_conn: pointer to beiscsi_conn |
| */ |
| int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn) |
| { |
| struct iscsi_conn *conn = cls_conn->dd_data; |
| struct beiscsi_conn *beiscsi_conn = conn->dd_data; |
| struct beiscsi_endpoint *beiscsi_ep; |
| struct beiscsi_offload_params params; |
| |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n"); |
| memset(¶ms, 0, sizeof(struct beiscsi_offload_params)); |
| beiscsi_ep = beiscsi_conn->ep; |
| if (!beiscsi_ep) |
| SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n"); |
| |
| beiscsi_conn->login_in_progress = 0; |
| beiscsi_set_params_for_offld(beiscsi_conn, ¶ms); |
| beiscsi_offload_connection(beiscsi_conn, ¶ms); |
| iscsi_conn_start(cls_conn); |
| return 0; |
| } |
| |
| /** |
| * beiscsi_get_cid - Allocate a cid |
| * @phba: The phba instance |
| */ |
| static int beiscsi_get_cid(struct beiscsi_hba *phba) |
| { |
| unsigned short cid = 0xFFFF; |
| |
| if (!phba->avlbl_cids) |
| return cid; |
| |
| cid = phba->cid_array[phba->cid_alloc++]; |
| if (phba->cid_alloc == phba->params.cxns_per_ctrl) |
| phba->cid_alloc = 0; |
| phba->avlbl_cids--; |
| return cid; |
| } |
| |
| /** |
| * beiscsi_open_conn - Ask FW to open a TCP connection |
| * @ep: endpoint to be used |
| * @src_addr: The source IP address |
| * @dst_addr: The Destination IP address |
| * |
| * Asks the FW to open a TCP connection |
| */ |
| static int beiscsi_open_conn(struct iscsi_endpoint *ep, |
| struct sockaddr *src_addr, |
| struct sockaddr *dst_addr, int non_blocking) |
| { |
| struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; |
| struct beiscsi_hba *phba = beiscsi_ep->phba; |
| struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q; |
| struct be_mcc_wrb *wrb; |
| struct tcp_connect_and_offload_out *ptcpcnct_out; |
| unsigned short status, extd_status; |
| unsigned int tag, wrb_num; |
| int ret = -1; |
| |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n"); |
| beiscsi_ep->ep_cid = beiscsi_get_cid(phba); |
| if (beiscsi_ep->ep_cid == 0xFFFF) { |
| SE_DEBUG(DBG_LVL_1, "No free cid available\n"); |
| return ret; |
| } |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d ", |
| beiscsi_ep->ep_cid); |
| phba->ep_array[beiscsi_ep->ep_cid - |
| phba->fw_config.iscsi_cid_start] = ep; |
| if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start + |
| phba->params.cxns_per_ctrl * 2)) { |
| SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n"); |
| return ret; |
| } |
| |
| beiscsi_ep->cid_vld = 0; |
| tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep); |
| if (!tag) { |
| SE_DEBUG(DBG_LVL_1, |
| "mgmt_open_connection Failed for cid=%d \n", |
| beiscsi_ep->ep_cid); |
| } else { |
| wait_event_interruptible(phba->ctrl.mcc_wait[tag], |
| phba->ctrl.mcc_numtag[tag]); |
| } |
| wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16; |
| extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8; |
| status = phba->ctrl.mcc_numtag[tag] & 0x000000FF; |
| if (status || extd_status) { |
| SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed" |
| " status = %d extd_status = %d \n", |
| status, extd_status); |
| free_mcc_tag(&phba->ctrl, tag); |
| return -1; |
| } else { |
| wrb = queue_get_wrb(mccq, wrb_num); |
| free_mcc_tag(&phba->ctrl, tag); |
| |
| ptcpcnct_out = embedded_payload(wrb); |
| beiscsi_ep = ep->dd_data; |
| beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle; |
| beiscsi_ep->cid_vld = 1; |
| SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n"); |
| } |
| return 0; |
| } |
| |
| /** |
| * beiscsi_put_cid - Free the cid |
| * @phba: The phba for which the cid is being freed |
| * @cid: The cid to free |
| */ |
| static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid) |
| { |
| phba->avlbl_cids++; |
| phba->cid_array[phba->cid_free++] = cid; |
| if (phba->cid_free == phba->params.cxns_per_ctrl) |
| phba->cid_free = 0; |
| } |
| |
| /** |
| * beiscsi_free_ep - free endpoint |
| * @ep: pointer to iscsi endpoint structure |
| */ |
| static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep) |
| { |
| struct beiscsi_hba *phba = beiscsi_ep->phba; |
| |
| beiscsi_put_cid(phba, beiscsi_ep->ep_cid); |
| beiscsi_ep->phba = NULL; |
| } |
| |
| /** |
| * beiscsi_ep_connect - Ask chip to create TCP Conn |
| * @scsi_host: Pointer to scsi_host structure |
| * @dst_addr: The IP address of Target |
| * @non_blocking: blocking or non-blocking call |
| * |
| * This routines first asks chip to create a connection and then allocates an EP |
| */ |
| struct iscsi_endpoint * |
| beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, |
| int non_blocking) |
| { |
| struct beiscsi_hba *phba; |
| struct beiscsi_endpoint *beiscsi_ep; |
| struct iscsi_endpoint *ep; |
| int ret; |
| |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect \n"); |
| if (shost) |
| phba = iscsi_host_priv(shost); |
| else { |
| ret = -ENXIO; |
| SE_DEBUG(DBG_LVL_1, "shost is NULL \n"); |
| return ERR_PTR(ret); |
| } |
| |
| if (phba->state != BE_ADAPTER_UP) { |
| ret = -EBUSY; |
| SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP \n"); |
| return ERR_PTR(ret); |
| } |
| |
| ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint)); |
| if (!ep) { |
| ret = -ENOMEM; |
| return ERR_PTR(ret); |
| } |
| |
| beiscsi_ep = ep->dd_data; |
| beiscsi_ep->phba = phba; |
| beiscsi_ep->openiscsi_ep = ep; |
| if (beiscsi_open_conn(ep, NULL, dst_addr, non_blocking)) { |
| SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn \n"); |
| ret = -ENOMEM; |
| goto free_ep; |
| } |
| |
| return ep; |
| |
| free_ep: |
| beiscsi_free_ep(beiscsi_ep); |
| return ERR_PTR(ret); |
| } |
| |
| /** |
| * beiscsi_ep_poll - Poll to see if connection is established |
| * @ep: endpoint to be used |
| * @timeout_ms: timeout specified in millisecs |
| * |
| * Poll to see if TCP connection established |
| */ |
| int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) |
| { |
| struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; |
| |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_poll\n"); |
| if (beiscsi_ep->cid_vld == 1) |
| return 1; |
| else |
| return 0; |
| } |
| |
| /** |
| * beiscsi_close_conn - Upload the connection |
| * @ep: The iscsi endpoint |
| * @flag: The type of connection closure |
| */ |
| static int beiscsi_close_conn(struct beiscsi_endpoint *beiscsi_ep, int flag) |
| { |
| int ret = 0; |
| unsigned int tag; |
| struct beiscsi_hba *phba = beiscsi_ep->phba; |
| |
| tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag); |
| if (!tag) { |
| SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x", |
| beiscsi_ep->ep_cid); |
| ret = -1; |
| } else { |
| wait_event_interruptible(phba->ctrl.mcc_wait[tag], |
| phba->ctrl.mcc_numtag[tag]); |
| free_mcc_tag(&phba->ctrl, tag); |
| } |
| return ret; |
| } |
| |
| /** |
| * beiscsi_ep_disconnect - Tears down the TCP connection |
| * @ep: endpoint to be used |
| * |
| * Tears down the TCP connection |
| */ |
| void beiscsi_ep_disconnect(struct iscsi_endpoint *ep) |
| { |
| struct beiscsi_conn *beiscsi_conn; |
| struct beiscsi_endpoint *beiscsi_ep; |
| struct beiscsi_hba *phba; |
| |
| beiscsi_ep = ep->dd_data; |
| phba = beiscsi_ep->phba; |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n", |
| beiscsi_ep->ep_cid); |
| |
| if (beiscsi_ep->conn) { |
| beiscsi_conn = beiscsi_ep->conn; |
| iscsi_suspend_queue(beiscsi_conn->conn); |
| } |
| |
| } |
| |
| /** |
| * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table |
| * @phba: The phba instance |
| * @cid: The cid to free |
| */ |
| static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba, |
| unsigned int cid) |
| { |
| if (phba->conn_table[cid]) |
| phba->conn_table[cid] = NULL; |
| else { |
| SE_DEBUG(DBG_LVL_8, "Connection table Not occupied. \n"); |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| /** |
| * beiscsi_conn_stop - Invalidate and stop the connection |
| * @cls_conn: pointer to get iscsi_conn |
| * @flag: The type of connection closure |
| */ |
| void beiscsi_conn_stop(struct iscsi_cls_conn *cls_conn, int flag) |
| { |
| struct iscsi_conn *conn = cls_conn->dd_data; |
| struct beiscsi_conn *beiscsi_conn = conn->dd_data; |
| struct beiscsi_endpoint *beiscsi_ep; |
| struct iscsi_session *session = conn->session; |
| struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session); |
| struct beiscsi_hba *phba = iscsi_host_priv(shost); |
| unsigned int tag; |
| unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH; |
| |
| beiscsi_ep = beiscsi_conn->ep; |
| if (!beiscsi_ep) { |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_stop , no beiscsi_ep\n"); |
| return; |
| } |
| SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_stop ep_cid = %d\n", |
| beiscsi_ep->ep_cid); |
| tag = mgmt_invalidate_connection(phba, beiscsi_ep, |
| beiscsi_ep->ep_cid, 1, |
| savecfg_flag); |
| if (!tag) { |
| SE_DEBUG(DBG_LVL_1, |
| "mgmt_invalidate_connection Failed for cid=%d \n", |
| beiscsi_ep->ep_cid); |
| } else { |
| wait_event_interruptible(phba->ctrl.mcc_wait[tag], |
| phba->ctrl.mcc_numtag[tag]); |
| free_mcc_tag(&phba->ctrl, tag); |
| } |
| beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL); |
| beiscsi_free_ep(beiscsi_ep); |
| iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep); |
| beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid); |
| iscsi_conn_stop(cls_conn, flag); |
| } |