diff options
Diffstat (limited to 'drivers/scsi/qedi/qedi_iscsi.c')
| -rw-r--r-- | drivers/scsi/qedi/qedi_iscsi.c | 1624 |
1 files changed, 1624 insertions, 0 deletions
diff --git a/drivers/scsi/qedi/qedi_iscsi.c b/drivers/scsi/qedi/qedi_iscsi.c new file mode 100644 index 000000000000..d6a205433b66 --- /dev/null +++ b/drivers/scsi/qedi/qedi_iscsi.c @@ -0,0 +1,1624 @@ +/* + * 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_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, + .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 iscsi_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 iscsi_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"); + goto update_conn_err; + } + + kfree(conn_info); + rval = 0; + +update_conn_err: + 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 iscsi_sge *bd_tbl; + + bd_tbl = (struct iscsi_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->reserved0 = 0; + bd_tbl = (struct iscsi_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; + bd_tbl->reserved0 = 0; +} + +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; + + if (!shost) { + ret = -ENXIO; + QEDI_ERR(NULL, "shost is NULL\n"); + return ERR_PTR(ret); + } + + if (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; + ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); + if (ret) + QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n", + ret); +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 (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 (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 (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_CONN, + "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep); + + 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", + atomic_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_SEG_PROC_IP_OPTIONS_ERROR, + "tcp seg ip options 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); +} |