| /* |
| * QLogic iSCSI Offload Driver |
| * Copyright (c) 2016 Cavium Inc. |
| * |
| * This software is available under the terms of the GNU General Public License |
| * (GPL) Version 2, available from the file COPYING in the main directory of |
| * this source tree. |
| */ |
| |
| #include <linux/blkdev.h> |
| #include <linux/etherdevice.h> |
| #include <linux/if_ether.h> |
| #include <linux/if_vlan.h> |
| #include <scsi/scsi_tcq.h> |
| |
| #include "qedi.h" |
| #include "qedi_iscsi.h" |
| #include "qedi_gbl.h" |
| |
| int qedi_recover_all_conns(struct qedi_ctx *qedi) |
| { |
| struct qedi_conn *qedi_conn; |
| int i; |
| |
| for (i = 0; i < qedi->max_active_conns; i++) { |
| qedi_conn = qedi_get_conn_from_id(qedi, i); |
| if (!qedi_conn) |
| continue; |
| |
| qedi_start_conn_recovery(qedi, qedi_conn); |
| } |
| |
| return SUCCESS; |
| } |
| |
| static int qedi_eh_host_reset(struct scsi_cmnd *cmd) |
| { |
| struct Scsi_Host *shost = cmd->device->host; |
| struct qedi_ctx *qedi; |
| |
| qedi = iscsi_host_priv(shost); |
| |
| return qedi_recover_all_conns(qedi); |
| } |
| |
| struct scsi_host_template qedi_host_template = { |
| .module = THIS_MODULE, |
| .name = "QLogic QEDI 25/40/100Gb iSCSI Initiator Driver", |
| .proc_name = QEDI_MODULE_NAME, |
| .queuecommand = iscsi_queuecommand, |
| .eh_timed_out = iscsi_eh_cmd_timed_out, |
| .eh_abort_handler = iscsi_eh_abort, |
| .eh_device_reset_handler = iscsi_eh_device_reset, |
| .eh_target_reset_handler = iscsi_eh_recover_target, |
| .eh_host_reset_handler = qedi_eh_host_reset, |
| .target_alloc = iscsi_target_alloc, |
| .change_queue_depth = scsi_change_queue_depth, |
| .can_queue = QEDI_MAX_ISCSI_TASK, |
| .this_id = -1, |
| .sg_tablesize = QEDI_ISCSI_MAX_BDS_PER_CMD, |
| .max_sectors = 0xffff, |
| .dma_boundary = QEDI_HW_DMA_BOUNDARY, |
| .cmd_per_lun = 128, |
| .use_clustering = ENABLE_CLUSTERING, |
| .shost_attrs = qedi_shost_attrs, |
| }; |
| |
| static void qedi_conn_free_login_resources(struct qedi_ctx *qedi, |
| struct qedi_conn *qedi_conn) |
| { |
| if (qedi_conn->gen_pdu.resp_bd_tbl) { |
| dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, |
| qedi_conn->gen_pdu.resp_bd_tbl, |
| qedi_conn->gen_pdu.resp_bd_dma); |
| qedi_conn->gen_pdu.resp_bd_tbl = NULL; |
| } |
| |
| if (qedi_conn->gen_pdu.req_bd_tbl) { |
| dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, |
| qedi_conn->gen_pdu.req_bd_tbl, |
| qedi_conn->gen_pdu.req_bd_dma); |
| qedi_conn->gen_pdu.req_bd_tbl = NULL; |
| } |
| |
| if (qedi_conn->gen_pdu.resp_buf) { |
| dma_free_coherent(&qedi->pdev->dev, |
| ISCSI_DEF_MAX_RECV_SEG_LEN, |
| qedi_conn->gen_pdu.resp_buf, |
| qedi_conn->gen_pdu.resp_dma_addr); |
| qedi_conn->gen_pdu.resp_buf = NULL; |
| } |
| |
| if (qedi_conn->gen_pdu.req_buf) { |
| dma_free_coherent(&qedi->pdev->dev, |
| ISCSI_DEF_MAX_RECV_SEG_LEN, |
| qedi_conn->gen_pdu.req_buf, |
| qedi_conn->gen_pdu.req_dma_addr); |
| qedi_conn->gen_pdu.req_buf = NULL; |
| } |
| } |
| |
| static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi, |
| struct qedi_conn *qedi_conn) |
| { |
| qedi_conn->gen_pdu.req_buf = |
| dma_alloc_coherent(&qedi->pdev->dev, |
| ISCSI_DEF_MAX_RECV_SEG_LEN, |
| &qedi_conn->gen_pdu.req_dma_addr, |
| GFP_KERNEL); |
| if (!qedi_conn->gen_pdu.req_buf) |
| goto login_req_buf_failure; |
| |
| qedi_conn->gen_pdu.req_buf_size = 0; |
| qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf; |
| |
| qedi_conn->gen_pdu.resp_buf = |
| dma_alloc_coherent(&qedi->pdev->dev, |
| ISCSI_DEF_MAX_RECV_SEG_LEN, |
| &qedi_conn->gen_pdu.resp_dma_addr, |
| GFP_KERNEL); |
| if (!qedi_conn->gen_pdu.resp_buf) |
| goto login_resp_buf_failure; |
| |
| qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN; |
| qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf; |
| |
| qedi_conn->gen_pdu.req_bd_tbl = |
| dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, |
| &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL); |
| if (!qedi_conn->gen_pdu.req_bd_tbl) |
| goto login_req_bd_tbl_failure; |
| |
| qedi_conn->gen_pdu.resp_bd_tbl = |
| dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, |
| &qedi_conn->gen_pdu.resp_bd_dma, |
| GFP_KERNEL); |
| if (!qedi_conn->gen_pdu.resp_bd_tbl) |
| goto login_resp_bd_tbl_failure; |
| |
| QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS, |
| "Allocation successful, cid=0x%x\n", |
| qedi_conn->iscsi_conn_id); |
| return 0; |
| |
| login_resp_bd_tbl_failure: |
| dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, |
| qedi_conn->gen_pdu.req_bd_tbl, |
| qedi_conn->gen_pdu.req_bd_dma); |
| qedi_conn->gen_pdu.req_bd_tbl = NULL; |
| |
| login_req_bd_tbl_failure: |
| dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, |
| qedi_conn->gen_pdu.resp_buf, |
| qedi_conn->gen_pdu.resp_dma_addr); |
| qedi_conn->gen_pdu.resp_buf = NULL; |
| login_resp_buf_failure: |
| dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, |
| qedi_conn->gen_pdu.req_buf, |
| qedi_conn->gen_pdu.req_dma_addr); |
| qedi_conn->gen_pdu.req_buf = NULL; |
| login_req_buf_failure: |
| iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data, |
| "login resource alloc failed!!\n"); |
| return -ENOMEM; |
| } |
| |
| static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi, |
| struct iscsi_session *session) |
| { |
| int i; |
| |
| for (i = 0; i < session->cmds_max; i++) { |
| struct iscsi_task *task = session->cmds[i]; |
| struct qedi_cmd *cmd = task->dd_data; |
| |
| if (cmd->io_tbl.sge_tbl) |
| dma_free_coherent(&qedi->pdev->dev, |
| QEDI_ISCSI_MAX_BDS_PER_CMD * |
| sizeof(struct scsi_sge), |
| cmd->io_tbl.sge_tbl, |
| cmd->io_tbl.sge_tbl_dma); |
| |
| if (cmd->sense_buffer) |
| dma_free_coherent(&qedi->pdev->dev, |
| SCSI_SENSE_BUFFERSIZE, |
| cmd->sense_buffer, |
| cmd->sense_buffer_dma); |
| } |
| } |
| |
| static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session, |
| struct qedi_cmd *cmd) |
| { |
| struct qedi_io_bdt *io = &cmd->io_tbl; |
| struct scsi_sge *sge; |
| |
| io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev, |
| QEDI_ISCSI_MAX_BDS_PER_CMD * |
| sizeof(*sge), |
| &io->sge_tbl_dma, GFP_KERNEL); |
| if (!io->sge_tbl) { |
| iscsi_session_printk(KERN_ERR, session, |
| "Could not allocate BD table.\n"); |
| return -ENOMEM; |
| } |
| |
| io->sge_valid = 0; |
| return 0; |
| } |
| |
| static int qedi_setup_cmd_pool(struct qedi_ctx *qedi, |
| struct iscsi_session *session) |
| { |
| int i; |
| |
| for (i = 0; i < session->cmds_max; i++) { |
| struct iscsi_task *task = session->cmds[i]; |
| struct qedi_cmd *cmd = task->dd_data; |
| |
| task->hdr = &cmd->hdr; |
| task->hdr_max = sizeof(struct iscsi_hdr); |
| |
| if (qedi_alloc_sget(qedi, session, cmd)) |
| goto free_sgets; |
| |
| cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev, |
| SCSI_SENSE_BUFFERSIZE, |
| &cmd->sense_buffer_dma, |
| GFP_KERNEL); |
| if (!cmd->sense_buffer) |
| goto free_sgets; |
| } |
| |
| return 0; |
| |
| free_sgets: |
| qedi_destroy_cmd_pool(qedi, session); |
| return -ENOMEM; |
| } |
| |
| static struct iscsi_cls_session * |
| qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max, |
| u16 qdepth, uint32_t initial_cmdsn) |
| { |
| struct Scsi_Host *shost; |
| struct iscsi_cls_session *cls_session; |
| struct qedi_ctx *qedi; |
| struct qedi_endpoint *qedi_ep; |
| |
| if (!ep) |
| return NULL; |
| |
| qedi_ep = ep->dd_data; |
| shost = qedi_ep->qedi->shost; |
| qedi = iscsi_host_priv(shost); |
| |
| if (cmds_max > qedi->max_sqes) |
| cmds_max = qedi->max_sqes; |
| else if (cmds_max < QEDI_SQ_WQES_MIN) |
| cmds_max = QEDI_SQ_WQES_MIN; |
| |
| cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost, |
| cmds_max, 0, sizeof(struct qedi_cmd), |
| initial_cmdsn, ISCSI_MAX_TARGET); |
| if (!cls_session) { |
| QEDI_ERR(&qedi->dbg_ctx, |
| "Failed to setup session for ep=%p\n", qedi_ep); |
| return NULL; |
| } |
| |
| if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) { |
| QEDI_ERR(&qedi->dbg_ctx, |
| "Failed to setup cmd pool for ep=%p\n", qedi_ep); |
| goto session_teardown; |
| } |
| |
| return cls_session; |
| |
| session_teardown: |
| iscsi_session_teardown(cls_session); |
| return NULL; |
| } |
| |
| static void qedi_session_destroy(struct iscsi_cls_session *cls_session) |
| { |
| struct iscsi_session *session = cls_session->dd_data; |
| struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); |
| struct qedi_ctx *qedi = iscsi_host_priv(shost); |
| |
| qedi_destroy_cmd_pool(qedi, session); |
| iscsi_session_teardown(cls_session); |
| } |
| |
| static struct iscsi_cls_conn * |
| qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid) |
| { |
| struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); |
| struct qedi_ctx *qedi = iscsi_host_priv(shost); |
| struct iscsi_cls_conn *cls_conn; |
| struct qedi_conn *qedi_conn; |
| struct iscsi_conn *conn; |
| |
| cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn), |
| cid); |
| if (!cls_conn) { |
| QEDI_ERR(&qedi->dbg_ctx, |
| "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n", |
| cid, cls_session); |
| return NULL; |
| } |
| |
| conn = cls_conn->dd_data; |
| qedi_conn = conn->dd_data; |
| qedi_conn->cls_conn = cls_conn; |
| qedi_conn->qedi = qedi; |
| qedi_conn->ep = NULL; |
| qedi_conn->active_cmd_count = 0; |
| INIT_LIST_HEAD(&qedi_conn->active_cmd_list); |
| spin_lock_init(&qedi_conn->list_lock); |
| |
| if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) { |
| iscsi_conn_printk(KERN_ALERT, conn, |
| "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n", |
| cid, cls_session); |
| goto free_conn; |
| } |
| |
| return cls_conn; |
| |
| free_conn: |
| iscsi_conn_teardown(cls_conn); |
| return NULL; |
| } |
| |
| void qedi_mark_device_missing(struct iscsi_cls_session *cls_session) |
| { |
| iscsi_block_session(cls_session); |
| } |
| |
| void qedi_mark_device_available(struct iscsi_cls_session *cls_session) |
| { |
| iscsi_unblock_session(cls_session); |
| } |
| |
| static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi, |
| struct qedi_conn *qedi_conn) |
| { |
| u32 iscsi_cid = qedi_conn->iscsi_conn_id; |
| |
| if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) { |
| iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, |
| "conn bind - entry #%d not free\n", |
| iscsi_cid); |
| return -EBUSY; |
| } |
| |
| qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn; |
| return 0; |
| } |
| |
| struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid) |
| { |
| if (!qedi->cid_que.conn_cid_tbl) { |
| QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n"); |
| return NULL; |
| |
| } else if (iscsi_cid >= qedi->max_active_conns) { |
| QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid); |
| return NULL; |
| } |
| return qedi->cid_que.conn_cid_tbl[iscsi_cid]; |
| } |
| |
| static int qedi_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 qedi_conn *qedi_conn = conn->dd_data; |
| struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); |
| struct qedi_ctx *qedi = iscsi_host_priv(shost); |
| struct qedi_endpoint *qedi_ep; |
| struct iscsi_endpoint *ep; |
| |
| ep = iscsi_lookup_endpoint(transport_fd); |
| if (!ep) |
| return -EINVAL; |
| |
| qedi_ep = ep->dd_data; |
| if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) || |
| (qedi_ep->state == EP_STATE_TCP_RST_RCVD)) |
| return -EINVAL; |
| |
| if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) |
| return -EINVAL; |
| |
| qedi_ep->conn = qedi_conn; |
| qedi_conn->ep = qedi_ep; |
| qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid; |
| qedi_conn->fw_cid = qedi_ep->fw_cid; |
| qedi_conn->cmd_cleanup_req = 0; |
| qedi_conn->cmd_cleanup_cmpl = 0; |
| |
| if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn)) |
| return -EINVAL; |
| |
| spin_lock_init(&qedi_conn->tmf_work_lock); |
| INIT_LIST_HEAD(&qedi_conn->tmf_work_list); |
| init_waitqueue_head(&qedi_conn->wait_queue); |
| return 0; |
| } |
| |
| static int qedi_iscsi_update_conn(struct qedi_ctx *qedi, |
| struct qedi_conn *qedi_conn) |
| { |
| struct qed_iscsi_params_update *conn_info; |
| struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn; |
| struct iscsi_conn *conn = cls_conn->dd_data; |
| struct qedi_endpoint *qedi_ep; |
| int rval; |
| |
| qedi_ep = qedi_conn->ep; |
| |
| conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); |
| if (!conn_info) { |
| QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n"); |
| return -ENOMEM; |
| } |
| |
| conn_info->update_flag = 0; |
| |
| if (conn->hdrdgst_en) |
| SET_FIELD(conn_info->update_flag, |
| ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true); |
| if (conn->datadgst_en) |
| SET_FIELD(conn_info->update_flag, |
| ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true); |
| if (conn->session->initial_r2t_en) |
| SET_FIELD(conn_info->update_flag, |
| ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T, |
| true); |
| if (conn->session->imm_data_en) |
| SET_FIELD(conn_info->update_flag, |
| ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA, |
| true); |
| |
| conn_info->max_seq_size = conn->session->max_burst; |
| conn_info->max_recv_pdu_length = conn->max_recv_dlength; |
| conn_info->max_send_pdu_length = conn->max_xmit_dlength; |
| conn_info->first_seq_length = conn->session->first_burst; |
| conn_info->exp_stat_sn = conn->exp_statsn; |
| |
| rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle, |
| conn_info); |
| if (rval) { |
| rval = -ENXIO; |
| QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n"); |
| } |
| |
| kfree(conn_info); |
| return rval; |
| } |
| |
| static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en) |
| { |
| u16 mss = 0; |
| u16 hdrs = TCP_HDR_LEN; |
| |
| if (is_ipv6) |
| hdrs += IPV6_HDR_LEN; |
| else |
| hdrs += IPV4_HDR_LEN; |
| |
| if (vlan_en) |
| hdrs += VLAN_LEN; |
| |
| mss = pmtu - hdrs; |
| |
| if (tcp_ts_en) |
| mss -= TCP_OPTION_LEN; |
| |
| if (!mss) |
| mss = DEF_MSS; |
| |
| return mss; |
| } |
| |
| static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep) |
| { |
| struct qedi_ctx *qedi = qedi_ep->qedi; |
| struct qed_iscsi_params_offload *conn_info; |
| int rval; |
| int i; |
| |
| conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); |
| if (!conn_info) { |
| QEDI_ERR(&qedi->dbg_ctx, |
| "Failed to allocate memory ep=%p\n", qedi_ep); |
| return -ENOMEM; |
| } |
| |
| ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac); |
| ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac); |
| |
| conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]); |
| conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]); |
| |
| if (qedi_ep->ip_type == TCP_IPV4) { |
| conn_info->ip_version = 0; |
| QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, |
| "After ntohl: src_addr=%pI4, dst_addr=%pI4\n", |
| qedi_ep->src_addr, qedi_ep->dst_addr); |
| } else { |
| for (i = 1; i < 4; i++) { |
| conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]); |
| conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]); |
| } |
| |
| conn_info->ip_version = 1; |
| QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, |
| "After ntohl: src_addr=%pI6, dst_addr=%pI6\n", |
| qedi_ep->src_addr, qedi_ep->dst_addr); |
| } |
| |
| conn_info->src.port = qedi_ep->src_port; |
| conn_info->dst.port = qedi_ep->dst_port; |
| |
| conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE; |
| conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma; |
| conn_info->vlan_id = qedi_ep->vlan_id; |
| |
| SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1); |
| SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1); |
| SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1); |
| SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1); |
| |
| conn_info->default_cq = (qedi_ep->fw_cid % 8); |
| |
| conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT; |
| conn_info->dup_ack_theshold = 3; |
| conn_info->rcv_wnd = 65535; |
| conn_info->cwnd = DEF_MAX_CWND; |
| |
| conn_info->ss_thresh = 65535; |
| conn_info->srtt = 300; |
| conn_info->rtt_var = 150; |
| conn_info->flow_label = 0; |
| conn_info->ka_timeout = DEF_KA_TIMEOUT; |
| conn_info->ka_interval = DEF_KA_INTERVAL; |
| conn_info->max_rt_time = DEF_MAX_RT_TIME; |
| conn_info->ttl = DEF_TTL; |
| conn_info->tos_or_tc = DEF_TOS; |
| conn_info->remote_port = qedi_ep->dst_port; |
| conn_info->local_port = qedi_ep->src_port; |
| |
| conn_info->mss = qedi_calc_mss(qedi_ep->pmtu, |
| (qedi_ep->ip_type == TCP_IPV6), |
| 1, (qedi_ep->vlan_id != 0)); |
| |
| conn_info->rcv_wnd_scale = 4; |
| conn_info->ts_ticks_per_second = 1000; |
| conn_info->da_timeout_value = 200; |
| conn_info->ack_frequency = 2; |
| |
| QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, |
| "Default cq index [%d], mss [%d]\n", |
| conn_info->default_cq, conn_info->mss); |
| |
| rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info); |
| if (rval) |
| QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n", |
| rval, qedi_ep); |
| |
| kfree(conn_info); |
| return rval; |
| } |
| |
| static int qedi_conn_start(struct iscsi_cls_conn *cls_conn) |
| { |
| struct iscsi_conn *conn = cls_conn->dd_data; |
| struct qedi_conn *qedi_conn = conn->dd_data; |
| struct qedi_ctx *qedi; |
| int rval; |
| |
| qedi = qedi_conn->qedi; |
| |
| rval = qedi_iscsi_update_conn(qedi, qedi_conn); |
| if (rval) { |
| iscsi_conn_printk(KERN_ALERT, conn, |
| "conn_start: FW oflload conn failed.\n"); |
| rval = -EINVAL; |
| goto start_err; |
| } |
| |
| clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags); |
| qedi_conn->abrt_conn = 0; |
| |
| rval = iscsi_conn_start(cls_conn); |
| if (rval) { |
| iscsi_conn_printk(KERN_ALERT, conn, |
| "iscsi_conn_start: FW oflload conn failed!!\n"); |
| } |
| |
| start_err: |
| return rval; |
| } |
| |
| static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn) |
| { |
| struct iscsi_conn *conn = cls_conn->dd_data; |
| struct qedi_conn *qedi_conn = conn->dd_data; |
| struct Scsi_Host *shost; |
| struct qedi_ctx *qedi; |
| |
| shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); |
| qedi = iscsi_host_priv(shost); |
| |
| qedi_conn_free_login_resources(qedi, qedi_conn); |
| iscsi_conn_teardown(cls_conn); |
| } |
| |
| static int qedi_ep_get_param(struct iscsi_endpoint *ep, |
| enum iscsi_param param, char *buf) |
| { |
| struct qedi_endpoint *qedi_ep = ep->dd_data; |
| int len; |
| |
| if (!qedi_ep) |
| return -ENOTCONN; |
| |
| switch (param) { |
| case ISCSI_PARAM_CONN_PORT: |
| len = sprintf(buf, "%hu\n", qedi_ep->dst_port); |
| break; |
| case ISCSI_PARAM_CONN_ADDRESS: |
| if (qedi_ep->ip_type == TCP_IPV4) |
| len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr); |
| else |
| len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr); |
| break; |
| default: |
| return -ENOTCONN; |
| } |
| |
| return len; |
| } |
| |
| static int qedi_host_get_param(struct Scsi_Host *shost, |
| enum iscsi_host_param param, char *buf) |
| { |
| struct qedi_ctx *qedi; |
| int len; |
| |
| qedi = iscsi_host_priv(shost); |
| |
| switch (param) { |
| case ISCSI_HOST_PARAM_HWADDRESS: |
| len = sysfs_format_mac(buf, qedi->mac, 6); |
| break; |
| case ISCSI_HOST_PARAM_NETDEV_NAME: |
| len = sprintf(buf, "host%d\n", shost->host_no); |
| break; |
| case ISCSI_HOST_PARAM_IPADDRESS: |
| if (qedi->ip_type == TCP_IPV4) |
| len = sprintf(buf, "%pI4\n", qedi->src_ip); |
| else |
| len = sprintf(buf, "%pI6\n", qedi->src_ip); |
| break; |
| default: |
| return iscsi_host_get_param(shost, param, buf); |
| } |
| |
| return len; |
| } |
| |
| static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn, |
| struct iscsi_stats *stats) |
| { |
| struct iscsi_conn *conn = cls_conn->dd_data; |
| struct qed_iscsi_stats iscsi_stats; |
| struct Scsi_Host *shost; |
| struct qedi_ctx *qedi; |
| |
| shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); |
| qedi = iscsi_host_priv(shost); |
| qedi_ops->get_stats(qedi->cdev, &iscsi_stats); |
| |
| conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt; |
| conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt; |
| conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt; |
| conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt; |
| conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt; |
| |
| stats->txdata_octets = conn->txdata_octets; |
| stats->rxdata_octets = conn->rxdata_octets; |
| stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; |
| stats->dataout_pdus = conn->dataout_pdus_cnt; |
| stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; |
| stats->datain_pdus = conn->datain_pdus_cnt; |
| stats->r2t_pdus = conn->r2t_pdus_cnt; |
| stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; |
| stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; |
| stats->digest_err = 0; |
| stats->timeout_err = 0; |
| strcpy(stats->custom[0].desc, "eh_abort_cnt"); |
| stats->custom[0].value = conn->eh_abort_cnt; |
| stats->custom_length = 1; |
| } |
| |
| static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn) |
| { |
| struct scsi_sge *bd_tbl; |
| |
| bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl; |
| |
| bd_tbl->sge_addr.hi = |
| (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32); |
| bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr; |
| bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr - |
| qedi_conn->gen_pdu.req_buf; |
| bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; |
| bd_tbl->sge_addr.hi = |
| (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32); |
| bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr; |
| bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN; |
| } |
| |
| static int qedi_iscsi_send_generic_request(struct iscsi_task *task) |
| { |
| struct qedi_cmd *cmd = task->dd_data; |
| struct qedi_conn *qedi_conn = cmd->conn; |
| char *buf; |
| int data_len; |
| int rc = 0; |
| |
| qedi_iscsi_prep_generic_pdu_bd(qedi_conn); |
| switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { |
| case ISCSI_OP_LOGIN: |
| qedi_send_iscsi_login(qedi_conn, task); |
| break; |
| case ISCSI_OP_NOOP_OUT: |
| data_len = qedi_conn->gen_pdu.req_buf_size; |
| buf = qedi_conn->gen_pdu.req_buf; |
| if (data_len) |
| rc = qedi_send_iscsi_nopout(qedi_conn, task, |
| buf, data_len, 1); |
| else |
| rc = qedi_send_iscsi_nopout(qedi_conn, task, |
| NULL, 0, 1); |
| break; |
| case ISCSI_OP_LOGOUT: |
| rc = qedi_send_iscsi_logout(qedi_conn, task); |
| break; |
| case ISCSI_OP_SCSI_TMFUNC: |
| rc = qedi_iscsi_abort_work(qedi_conn, task); |
| break; |
| case ISCSI_OP_TEXT: |
| rc = qedi_send_iscsi_text(qedi_conn, task); |
| break; |
| default: |
| iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, |
| "unsupported op 0x%x\n", task->hdr->opcode); |
| } |
| |
| return rc; |
| } |
| |
| static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) |
| { |
| struct qedi_conn *qedi_conn = conn->dd_data; |
| struct qedi_cmd *cmd = task->dd_data; |
| |
| memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); |
| |
| qedi_conn->gen_pdu.req_buf_size = task->data_count; |
| |
| if (task->data_count) { |
| memcpy(qedi_conn->gen_pdu.req_buf, task->data, |
| task->data_count); |
| qedi_conn->gen_pdu.req_wr_ptr = |
| qedi_conn->gen_pdu.req_buf + task->data_count; |
| } |
| |
| cmd->conn = conn->dd_data; |
| cmd->scsi_cmd = NULL; |
| return qedi_iscsi_send_generic_request(task); |
| } |
| |
| static int qedi_task_xmit(struct iscsi_task *task) |
| { |
| struct iscsi_conn *conn = task->conn; |
| struct qedi_conn *qedi_conn = conn->dd_data; |
| struct qedi_cmd *cmd = task->dd_data; |
| struct scsi_cmnd *sc = task->sc; |
| |
| cmd->state = 0; |
| cmd->task = NULL; |
| cmd->use_slowpath = false; |
| cmd->conn = qedi_conn; |
| cmd->task = task; |
| cmd->io_cmd_in_list = false; |
| INIT_LIST_HEAD(&cmd->io_cmd); |
| |
| if (!sc) |
| return qedi_mtask_xmit(conn, task); |
| |
| cmd->scsi_cmd = sc; |
| return qedi_iscsi_send_ioreq(task); |
| } |
| |
| static struct iscsi_endpoint * |
| qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, |
| int non_blocking) |
| { |
| struct qedi_ctx *qedi; |
| struct iscsi_endpoint *ep; |
| struct qedi_endpoint *qedi_ep; |
| struct sockaddr_in *addr; |
| struct sockaddr_in6 *addr6; |
| struct qed_dev *cdev = NULL; |
| struct qedi_uio_dev *udev = NULL; |
| struct iscsi_path path_req; |
| u32 msg_type = ISCSI_KEVENT_IF_DOWN; |
| u32 iscsi_cid = QEDI_CID_RESERVED; |
| u16 len = 0; |
| char *buf = NULL; |
| int ret, tmp; |
| |
| if (!shost) { |
| ret = -ENXIO; |
| QEDI_ERR(NULL, "shost is NULL\n"); |
| return ERR_PTR(ret); |
| } |
| |
| if (qedi_do_not_recover) { |
| ret = -ENOMEM; |
| return ERR_PTR(ret); |
| } |
| |
| qedi = iscsi_host_priv(shost); |
| cdev = qedi->cdev; |
| udev = qedi->udev; |
| |
| if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) || |
| test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { |
| ret = -ENOMEM; |
| return ERR_PTR(ret); |
| } |
| |
| ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint)); |
| if (!ep) { |
| QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n"); |
| ret = -ENOMEM; |
| return ERR_PTR(ret); |
| } |
| qedi_ep = ep->dd_data; |
| memset(qedi_ep, 0, sizeof(struct qedi_endpoint)); |
| qedi_ep->state = EP_STATE_IDLE; |
| qedi_ep->iscsi_cid = (u32)-1; |
| qedi_ep->qedi = qedi; |
| |
| if (dst_addr->sa_family == AF_INET) { |
| addr = (struct sockaddr_in *)dst_addr; |
| memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr, |
| sizeof(struct in_addr)); |
| qedi_ep->dst_port = ntohs(addr->sin_port); |
| qedi_ep->ip_type = TCP_IPV4; |
| QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, |
| "dst_addr=%pI4, dst_port=%u\n", |
| qedi_ep->dst_addr, qedi_ep->dst_port); |
| } else if (dst_addr->sa_family == AF_INET6) { |
| addr6 = (struct sockaddr_in6 *)dst_addr; |
| memcpy(qedi_ep->dst_addr, &addr6->sin6_addr, |
| sizeof(struct in6_addr)); |
| qedi_ep->dst_port = ntohs(addr6->sin6_port); |
| qedi_ep->ip_type = TCP_IPV6; |
| QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, |
| "dst_addr=%pI6, dst_port=%u\n", |
| qedi_ep->dst_addr, qedi_ep->dst_port); |
| } else { |
| QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n"); |
| } |
| |
| if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) { |
| QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n"); |
| ret = -ENXIO; |
| goto ep_conn_exit; |
| } |
| |
| ret = qedi_alloc_sq(qedi, qedi_ep); |
| if (ret) |
| goto ep_conn_exit; |
| |
| ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle, |
| &qedi_ep->fw_cid, &qedi_ep->p_doorbell); |
| |
| if (ret) { |
| QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n"); |
| ret = -ENXIO; |
| goto ep_free_sq; |
| } |
| |
| iscsi_cid = qedi_ep->handle; |
| qedi_ep->iscsi_cid = iscsi_cid; |
| |
| init_waitqueue_head(&qedi_ep->ofld_wait); |
| init_waitqueue_head(&qedi_ep->tcp_ofld_wait); |
| qedi_ep->state = EP_STATE_OFLDCONN_START; |
| qedi->ep_tbl[iscsi_cid] = qedi_ep; |
| |
| buf = (char *)&path_req; |
| len = sizeof(path_req); |
| memset(&path_req, 0, len); |
| |
| msg_type = ISCSI_KEVENT_PATH_REQ; |
| path_req.handle = (u64)qedi_ep->iscsi_cid; |
| path_req.pmtu = qedi->ll2_mtu; |
| qedi_ep->pmtu = qedi->ll2_mtu; |
| if (qedi_ep->ip_type == TCP_IPV4) { |
| memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr, |
| sizeof(struct in_addr)); |
| path_req.ip_addr_len = 4; |
| } else { |
| memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr, |
| sizeof(struct in6_addr)); |
| path_req.ip_addr_len = 16; |
| } |
| |
| ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf, |
| len); |
| if (ret) { |
| QEDI_ERR(&qedi->dbg_ctx, |
| "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n", |
| iscsi_cid, ret); |
| goto ep_rel_conn; |
| } |
| |
| atomic_inc(&qedi->num_offloads); |
| return ep; |
| |
| ep_rel_conn: |
| qedi->ep_tbl[iscsi_cid] = NULL; |
| tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); |
| if (tmp) |
| QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n", |
| tmp); |
| ep_free_sq: |
| qedi_free_sq(qedi, qedi_ep); |
| ep_conn_exit: |
| iscsi_destroy_endpoint(ep); |
| return ERR_PTR(ret); |
| } |
| |
| static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) |
| { |
| struct qedi_endpoint *qedi_ep; |
| int ret = 0; |
| |
| if (qedi_do_not_recover) |
| return 1; |
| |
| qedi_ep = ep->dd_data; |
| if (qedi_ep->state == EP_STATE_IDLE || |
| qedi_ep->state == EP_STATE_OFLDCONN_FAILED) |
| return -1; |
| |
| if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL) |
| ret = 1; |
| |
| ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait, |
| QEDI_OFLD_WAIT_STATE(qedi_ep), |
| msecs_to_jiffies(timeout_ms)); |
| |
| if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED) |
| ret = -1; |
| |
| if (ret > 0) |
| return 1; |
| else if (!ret) |
| return 0; |
| else |
| return ret; |
| } |
| |
| static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn) |
| { |
| struct qedi_cmd *cmd, *cmd_tmp; |
| |
| list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list, |
| io_cmd) { |
| list_del_init(&cmd->io_cmd); |
| qedi_conn->active_cmd_count--; |
| } |
| } |
| |
| static void qedi_ep_disconnect(struct iscsi_endpoint *ep) |
| { |
| struct qedi_endpoint *qedi_ep; |
| struct qedi_conn *qedi_conn = NULL; |
| struct iscsi_conn *conn = NULL; |
| struct qedi_ctx *qedi; |
| int ret = 0; |
| int wait_delay = 20 * HZ; |
| int abrt_conn = 0; |
| int count = 10; |
| |
| qedi_ep = ep->dd_data; |
| qedi = qedi_ep->qedi; |
| |
| flush_work(&qedi_ep->offload_work); |
| |
| if (qedi_ep->conn) { |
| qedi_conn = qedi_ep->conn; |
| conn = qedi_conn->cls_conn->dd_data; |
| iscsi_suspend_queue(conn); |
| abrt_conn = qedi_conn->abrt_conn; |
| |
| while (count--) { |
| if (!test_bit(QEDI_CONN_FW_CLEANUP, |
| &qedi_conn->flags)) { |
| break; |
| } |
| msleep(1000); |
| } |
| |
| if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { |
| if (qedi_do_not_recover) { |
| QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, |
| "Do not recover cid=0x%x\n", |
| qedi_ep->iscsi_cid); |
| goto ep_exit_recover; |
| } |
| QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, |
| "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n", |
| qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state); |
| qedi_cleanup_active_cmd_list(qedi_conn); |
| goto ep_release_conn; |
| } |
| } |
| |
| if (qedi_do_not_recover) |
| goto ep_exit_recover; |
| |
| switch (qedi_ep->state) { |
| case EP_STATE_OFLDCONN_START: |
| goto ep_release_conn; |
| case EP_STATE_OFLDCONN_FAILED: |
| break; |
| case EP_STATE_OFLDCONN_COMPL: |
| if (unlikely(!qedi_conn)) |
| break; |
| |
| QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, |
| "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n", |
| qedi_conn->active_cmd_count, abrt_conn, |
| qedi_ep->state, |
| qedi_ep->iscsi_cid, |
| qedi_ep->conn |
| ); |
| |
| if (!qedi_conn->active_cmd_count) |
| abrt_conn = 0; |
| else |
| abrt_conn = 1; |
| |
| if (abrt_conn) |
| qedi_clearsq(qedi, qedi_conn, NULL); |
| break; |
| default: |
| break; |
| } |
| |
| qedi_ep->state = EP_STATE_DISCONN_START; |
| ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn); |
| if (ret) { |
| QEDI_WARN(&qedi->dbg_ctx, |
| "destroy_conn failed returned %d\n", ret); |
| } else { |
| ret = wait_event_interruptible_timeout( |
| qedi_ep->tcp_ofld_wait, |
| (qedi_ep->state != |
| EP_STATE_DISCONN_START), |
| wait_delay); |
| if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) { |
| QEDI_WARN(&qedi->dbg_ctx, |
| "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n", |
| ret, wait_delay, qedi_ep->iscsi_cid); |
| } |
| } |
| |
| ep_release_conn: |
| ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); |
| if (ret) |
| QEDI_WARN(&qedi->dbg_ctx, |
| "release_conn returned %d, cid=0x%x\n", |
| ret, qedi_ep->iscsi_cid); |
| ep_exit_recover: |
| qedi_ep->state = EP_STATE_IDLE; |
| qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL; |
| qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL; |
| qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port); |
| qedi_free_sq(qedi, qedi_ep); |
| |
| if (qedi_conn) |
| qedi_conn->ep = NULL; |
| |
| qedi_ep->conn = NULL; |
| qedi_ep->qedi = NULL; |
| atomic_dec(&qedi->num_offloads); |
| |
| iscsi_destroy_endpoint(ep); |
| } |
| |
| static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid) |
| { |
| struct qed_dev *cdev = qedi->cdev; |
| struct qedi_uio_dev *udev; |
| struct qedi_uio_ctrl *uctrl; |
| struct sk_buff *skb; |
| u32 len; |
| int rc = 0; |
| |
| udev = qedi->udev; |
| if (!udev) { |
| QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n"); |
| return -EINVAL; |
| } |
| |
| uctrl = (struct qedi_uio_ctrl *)udev->uctrl; |
| if (!uctrl) { |
| QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n"); |
| return -EINVAL; |
| } |
| |
| len = uctrl->host_tx_pkt_len; |
| if (!len) { |
| QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len); |
| return -EINVAL; |
| } |
| |
| skb = alloc_skb(len, GFP_ATOMIC); |
| if (!skb) { |
| QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n"); |
| return -EINVAL; |
| } |
| |
| skb_put(skb, len); |
| memcpy(skb->data, udev->tx_pkt, len); |
| skb->ip_summed = CHECKSUM_NONE; |
| |
| if (vlanid) |
| __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid); |
| |
| rc = qedi_ops->ll2->start_xmit(cdev, skb); |
| if (rc) { |
| QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n", |
| rc); |
| kfree_skb(skb); |
| } |
| |
| uctrl->host_tx_pkt_len = 0; |
| uctrl->hw_tx_cons++; |
| |
| return rc; |
| } |
| |
| static void qedi_offload_work(struct work_struct *work) |
| { |
| struct qedi_endpoint *qedi_ep = |
| container_of(work, struct qedi_endpoint, offload_work); |
| struct qedi_ctx *qedi; |
| int wait_delay = 20 * HZ; |
| int ret; |
| |
| qedi = qedi_ep->qedi; |
| |
| ret = qedi_iscsi_offload_conn(qedi_ep); |
| if (ret) { |
| QEDI_ERR(&qedi->dbg_ctx, |
| "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n", |
| qedi_ep->iscsi_cid, qedi_ep, ret); |
| qedi_ep->state = EP_STATE_OFLDCONN_FAILED; |
| return; |
| } |
| |
| ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait, |
| (qedi_ep->state == |
| EP_STATE_OFLDCONN_COMPL), |
| wait_delay); |
| if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) { |
| qedi_ep->state = EP_STATE_OFLDCONN_FAILED; |
| QEDI_ERR(&qedi->dbg_ctx, |
| "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n", |
| qedi_ep->iscsi_cid, qedi_ep); |
| } |
| } |
| |
| static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data) |
| { |
| struct qedi_ctx *qedi; |
| struct qedi_endpoint *qedi_ep; |
| int ret = 0; |
| u32 iscsi_cid; |
| u16 port_id = 0; |
| |
| if (!shost) { |
| ret = -ENXIO; |
| QEDI_ERR(NULL, "shost is NULL\n"); |
| return ret; |
| } |
| |
| if (strcmp(shost->hostt->proc_name, "qedi")) { |
| ret = -ENXIO; |
| QEDI_ERR(NULL, "shost %s is invalid\n", |
| shost->hostt->proc_name); |
| return ret; |
| } |
| |
| qedi = iscsi_host_priv(shost); |
| if (path_data->handle == QEDI_PATH_HANDLE) { |
| ret = qedi_data_avail(qedi, path_data->vlan_id); |
| goto set_path_exit; |
| } |
| |
| iscsi_cid = (u32)path_data->handle; |
| qedi_ep = qedi->ep_tbl[iscsi_cid]; |
| QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, |
| "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep); |
| if (!qedi_ep) { |
| ret = -EINVAL; |
| goto set_path_exit; |
| } |
| |
| if (!is_valid_ether_addr(&path_data->mac_addr[0])) { |
| QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n"); |
| ret = -EIO; |
| goto set_path_exit; |
| } |
| |
| ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]); |
| ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]); |
| |
| qedi_ep->vlan_id = path_data->vlan_id; |
| if (path_data->pmtu < DEF_PATH_MTU) { |
| qedi_ep->pmtu = qedi->ll2_mtu; |
| QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, |
| "MTU cannot be %u, using default MTU %u\n", |
| path_data->pmtu, qedi_ep->pmtu); |
| } |
| |
| if (path_data->pmtu != qedi->ll2_mtu) { |
| if (path_data->pmtu > JUMBO_MTU) { |
| ret = -EINVAL; |
| QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu); |
| goto set_path_exit; |
| } |
| |
| qedi_reset_host_mtu(qedi, path_data->pmtu); |
| qedi_ep->pmtu = qedi->ll2_mtu; |
| } |
| |
| port_id = qedi_ep->src_port; |
| if (port_id >= QEDI_LOCAL_PORT_MIN && |
| port_id < QEDI_LOCAL_PORT_MAX) { |
| if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id)) |
| port_id = 0; |
| } else { |
| port_id = 0; |
| } |
| |
| if (!port_id) { |
| port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl); |
| if (port_id == QEDI_LOCAL_PORT_INVALID) { |
| QEDI_ERR(&qedi->dbg_ctx, |
| "Failed to allocate port id for iscsi_cid=0x%x\n", |
| iscsi_cid); |
| ret = -ENOMEM; |
| goto set_path_exit; |
| } |
| } |
| |
| qedi_ep->src_port = port_id; |
| |
| if (qedi_ep->ip_type == TCP_IPV4) { |
| memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr, |
| sizeof(struct in_addr)); |
| memcpy(&qedi->src_ip[0], &path_data->src.v4_addr, |
| sizeof(struct in_addr)); |
| qedi->ip_type = TCP_IPV4; |
| |
| QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, |
| "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n", |
| qedi_ep->src_addr, qedi_ep->src_port, |
| qedi_ep->dst_addr, qedi_ep->dst_port); |
| } else { |
| memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr, |
| sizeof(struct in6_addr)); |
| memcpy(&qedi->src_ip[0], &path_data->src.v6_addr, |
| sizeof(struct in6_addr)); |
| qedi->ip_type = TCP_IPV6; |
| |
| QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, |
| "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n", |
| qedi_ep->src_addr, qedi_ep->src_port, |
| qedi_ep->dst_addr, qedi_ep->dst_port); |
| } |
| |
| INIT_WORK(&qedi_ep->offload_work, qedi_offload_work); |
| queue_work(qedi->offload_thread, &qedi_ep->offload_work); |
| |
| ret = 0; |
| |
| set_path_exit: |
| return ret; |
| } |
| |
| static umode_t qedi_attr_is_visible(int param_type, int param) |
| { |
| switch (param_type) { |
| case ISCSI_HOST_PARAM: |
| switch (param) { |
| case ISCSI_HOST_PARAM_NETDEV_NAME: |
| case ISCSI_HOST_PARAM_HWADDRESS: |
| case ISCSI_HOST_PARAM_IPADDRESS: |
| return 0444; |
| default: |
| return 0; |
| } |
| case ISCSI_PARAM: |
| switch (param) { |
| case ISCSI_PARAM_MAX_RECV_DLENGTH: |
| case ISCSI_PARAM_MAX_XMIT_DLENGTH: |
| case ISCSI_PARAM_HDRDGST_EN: |
| case ISCSI_PARAM_DATADGST_EN: |
| case ISCSI_PARAM_CONN_ADDRESS: |
| case ISCSI_PARAM_CONN_PORT: |
| case ISCSI_PARAM_EXP_STATSN: |
| case ISCSI_PARAM_PERSISTENT_ADDRESS: |
| case ISCSI_PARAM_PERSISTENT_PORT: |
| case ISCSI_PARAM_PING_TMO: |
| case ISCSI_PARAM_RECV_TMO: |
| case ISCSI_PARAM_INITIAL_R2T_EN: |
| case ISCSI_PARAM_MAX_R2T: |
| case ISCSI_PARAM_IMM_DATA_EN: |
| case ISCSI_PARAM_FIRST_BURST: |
| case ISCSI_PARAM_MAX_BURST: |
| case ISCSI_PARAM_PDU_INORDER_EN: |
| case ISCSI_PARAM_DATASEQ_INORDER_EN: |
| case ISCSI_PARAM_ERL: |
| case ISCSI_PARAM_TARGET_NAME: |
| case ISCSI_PARAM_TPGT: |
| case ISCSI_PARAM_USERNAME: |
| case ISCSI_PARAM_PASSWORD: |
| case ISCSI_PARAM_USERNAME_IN: |
| case ISCSI_PARAM_PASSWORD_IN: |
| case ISCSI_PARAM_FAST_ABORT: |
| case ISCSI_PARAM_ABORT_TMO: |
| case ISCSI_PARAM_LU_RESET_TMO: |
| case ISCSI_PARAM_TGT_RESET_TMO: |
| case ISCSI_PARAM_IFACE_NAME: |
| case ISCSI_PARAM_INITIATOR_NAME: |
| case ISCSI_PARAM_BOOT_ROOT: |
| case ISCSI_PARAM_BOOT_NIC: |
| case ISCSI_PARAM_BOOT_TARGET: |
| return 0444; |
| default: |
| return 0; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void qedi_cleanup_task(struct iscsi_task *task) |
| { |
| if (!task->sc || task->state == ISCSI_TASK_PENDING) { |
| QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n", |
| refcount_read(&task->refcount)); |
| return; |
| } |
| |
| qedi_iscsi_unmap_sg_list(task->dd_data); |
| } |
| |
| struct iscsi_transport qedi_iscsi_transport = { |
| .owner = THIS_MODULE, |
| .name = QEDI_MODULE_NAME, |
| .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST | |
| CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO, |
| .create_session = qedi_session_create, |
| .destroy_session = qedi_session_destroy, |
| .create_conn = qedi_conn_create, |
| .bind_conn = qedi_conn_bind, |
| .start_conn = qedi_conn_start, |
| .stop_conn = iscsi_conn_stop, |
| .destroy_conn = qedi_conn_destroy, |
| .set_param = iscsi_set_param, |
| .get_ep_param = qedi_ep_get_param, |
| .get_conn_param = iscsi_conn_get_param, |
| .get_session_param = iscsi_session_get_param, |
| .get_host_param = qedi_host_get_param, |
| .send_pdu = iscsi_conn_send_pdu, |
| .get_stats = qedi_conn_get_stats, |
| .xmit_task = qedi_task_xmit, |
| .cleanup_task = qedi_cleanup_task, |
| .session_recovery_timedout = iscsi_session_recovery_timedout, |
| .ep_connect = qedi_ep_connect, |
| .ep_poll = qedi_ep_poll, |
| .ep_disconnect = qedi_ep_disconnect, |
| .set_path = qedi_set_path, |
| .attr_is_visible = qedi_attr_is_visible, |
| }; |
| |
| void qedi_start_conn_recovery(struct qedi_ctx *qedi, |
| struct qedi_conn *qedi_conn) |
| { |
| struct iscsi_cls_session *cls_sess; |
| struct iscsi_cls_conn *cls_conn; |
| struct iscsi_conn *conn; |
| |
| cls_conn = qedi_conn->cls_conn; |
| conn = cls_conn->dd_data; |
| cls_sess = iscsi_conn_to_session(cls_conn); |
| |
| if (iscsi_is_session_online(cls_sess)) { |
| qedi_conn->abrt_conn = 1; |
| QEDI_ERR(&qedi->dbg_ctx, |
| "Failing connection, state=0x%x, cid=0x%x\n", |
| conn->session->state, qedi_conn->iscsi_conn_id); |
| iscsi_conn_failure(qedi_conn->cls_conn->dd_data, |
| ISCSI_ERR_CONN_FAILED); |
| } |
| } |
| |
| static const struct { |
| enum iscsi_error_types error_code; |
| char *err_string; |
| } qedi_iscsi_error[] = { |
| { ISCSI_STATUS_NONE, |
| "tcp_error none" |
| }, |
| { ISCSI_CONN_ERROR_TASK_CID_MISMATCH, |
| "task cid mismatch" |
| }, |
| { ISCSI_CONN_ERROR_TASK_NOT_VALID, |
| "invalid task" |
| }, |
| { ISCSI_CONN_ERROR_RQ_RING_IS_FULL, |
| "rq ring full" |
| }, |
| { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL, |
| "cmdq ring full" |
| }, |
| { ISCSI_CONN_ERROR_HQE_CACHING_FAILED, |
| "sge caching failed" |
| }, |
| { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR, |
| "hdr digest error" |
| }, |
| { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR, |
| "local cmpl error" |
| }, |
| { ISCSI_CONN_ERROR_DATA_OVERRUN, |
| "invalid task" |
| }, |
| { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR, |
| "out of sge error" |
| }, |
| { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR, |
| "tcp ip fragment error" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN, |
| "AHS len protocol error" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE, |
| "itt out of range error" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE, |
| "data seg more than pdu size" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE, |
| "invalid opcode" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE, |
| "invalid opcode before update" |
| }, |
| { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL, |
| "unexpected opcode" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA, |
| "r2t carries no data" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN, |
| "data sn error" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT, |
| "data TTT error" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT, |
| "r2t TTT error" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET, |
| "buffer offset error" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO, |
| "buffer offset ooo" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN, |
| "data seg len 0" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0, |
| "data xer len error" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1, |
| "data xer len1 error" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2, |
| "data xer len2 error" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN, |
| "protocol lun error" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO, |
| "f bit zero error" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN, |
| "exp stat sn error" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO, |
| "dsl not zero error" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL, |
| "invalid dsl" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG, |
| "data seg len too big" |
| }, |
| { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT, |
| "outstanding r2t count error" |
| }, |
| { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH, |
| "sense datalen error" |
| }, |
| }; |
| |
| char *qedi_get_iscsi_error(enum iscsi_error_types err_code) |
| { |
| int i; |
| char *msg = NULL; |
| |
| for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) { |
| if (qedi_iscsi_error[i].error_code == err_code) { |
| msg = qedi_iscsi_error[i].err_string; |
| break; |
| } |
| } |
| return msg; |
| } |
| |
| void qedi_process_iscsi_error(struct qedi_endpoint *ep, struct async_data *data) |
| { |
| struct qedi_conn *qedi_conn; |
| struct qedi_ctx *qedi; |
| char warn_notice[] = "iscsi_warning"; |
| char error_notice[] = "iscsi_error"; |
| char unknown_msg[] = "Unknown error"; |
| char *message; |
| int need_recovery = 0; |
| u32 err_mask = 0; |
| char *msg; |
| |
| if (!ep) |
| return; |
| |
| qedi_conn = ep->conn; |
| if (!qedi_conn) |
| return; |
| |
| qedi = ep->qedi; |
| |
| QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n", |
| data->error_code); |
| |
| if (err_mask) { |
| need_recovery = 0; |
| message = warn_notice; |
| } else { |
| need_recovery = 1; |
| message = error_notice; |
| } |
| |
| msg = qedi_get_iscsi_error(data->error_code); |
| if (!msg) { |
| need_recovery = 0; |
| msg = unknown_msg; |
| } |
| |
| iscsi_conn_printk(KERN_ALERT, |
| qedi_conn->cls_conn->dd_data, |
| "qedi: %s - %s\n", message, msg); |
| |
| if (need_recovery) |
| qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); |
| } |
| |
| void qedi_process_tcp_error(struct qedi_endpoint *ep, struct async_data *data) |
| { |
| struct qedi_conn *qedi_conn; |
| |
| if (!ep) |
| return; |
| |
| qedi_conn = ep->conn; |
| if (!qedi_conn) |
| return; |
| |
| QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n", |
| data->error_code); |
| |
| qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); |
| } |