/* * QLogic Fibre Channel HBA Driver * Copyright (c) 2003-2017 QLogic Corporation * * See LICENSE.qla2xxx for copyright and licensing details. */ #include "qla_nvme.h" #include #include #include #include static struct nvme_fc_port_template qla_nvme_fc_transport; static void qla_nvme_unregister_remote_port(struct work_struct *); int qla_nvme_register_remote(struct scsi_qla_host *vha, struct fc_port *fcport) { struct qla_nvme_rport *rport; struct nvme_fc_port_info req; int ret; if (!IS_ENABLED(CONFIG_NVME_FC)) return 0; if (!vha->flags.nvme_enabled) { ql_log(ql_log_info, vha, 0x2100, "%s: Not registering target since Host NVME is not enabled\n", __func__); return 0; } if (!vha->nvme_local_port && qla_nvme_register_hba(vha)) return 0; if (!(fcport->nvme_prli_service_param & (NVME_PRLI_SP_TARGET | NVME_PRLI_SP_DISCOVERY)) || (fcport->nvme_flag & NVME_FLAG_REGISTERED)) return 0; INIT_WORK(&fcport->nvme_del_work, qla_nvme_unregister_remote_port); fcport->nvme_flag &= ~NVME_FLAG_RESETTING; memset(&req, 0, sizeof(struct nvme_fc_port_info)); req.port_name = wwn_to_u64(fcport->port_name); req.node_name = wwn_to_u64(fcport->node_name); req.port_role = 0; req.dev_loss_tmo = NVME_FC_DEV_LOSS_TMO; if (fcport->nvme_prli_service_param & NVME_PRLI_SP_INITIATOR) req.port_role = FC_PORT_ROLE_NVME_INITIATOR; if (fcport->nvme_prli_service_param & NVME_PRLI_SP_TARGET) req.port_role |= FC_PORT_ROLE_NVME_TARGET; if (fcport->nvme_prli_service_param & NVME_PRLI_SP_DISCOVERY) req.port_role |= FC_PORT_ROLE_NVME_DISCOVERY; req.port_id = fcport->d_id.b24; ql_log(ql_log_info, vha, 0x2102, "%s: traddr=nn-0x%016llx:pn-0x%016llx PortID:%06x\n", __func__, req.node_name, req.port_name, req.port_id); ret = nvme_fc_register_remoteport(vha->nvme_local_port, &req, &fcport->nvme_remote_port); if (ret) { ql_log(ql_log_warn, vha, 0x212e, "Failed to register remote port. Transport returned %d\n", ret); return ret; } rport = fcport->nvme_remote_port->private; rport->fcport = fcport; list_add_tail(&rport->list, &vha->nvme_rport_list); fcport->nvme_flag |= NVME_FLAG_REGISTERED; return 0; } /* Allocate a queue for NVMe traffic */ static int qla_nvme_alloc_queue(struct nvme_fc_local_port *lport, unsigned int qidx, u16 qsize, void **handle) { struct scsi_qla_host *vha; struct qla_hw_data *ha; struct qla_qpair *qpair; /* Map admin queue and 1st IO queue to index 0 */ if (qidx) qidx--; vha = (struct scsi_qla_host *)lport->private; ha = vha->hw; ql_log(ql_log_info, vha, 0x2104, "%s: handle %p, idx =%d, qsize %d\n", __func__, handle, qidx, qsize); if (qidx > qla_nvme_fc_transport.max_hw_queues) { ql_log(ql_log_warn, vha, 0x212f, "%s: Illegal qidx=%d. Max=%d\n", __func__, qidx, qla_nvme_fc_transport.max_hw_queues); return -EINVAL; } if (ha->queue_pair_map[qidx]) { *handle = ha->queue_pair_map[qidx]; ql_log(ql_log_info, vha, 0x2121, "Returning existing qpair of %p for idx=%x\n", *handle, qidx); return 0; } qpair = qla2xxx_create_qpair(vha, 5, vha->vp_idx, true); if (qpair == NULL) { ql_log(ql_log_warn, vha, 0x2122, "Failed to allocate qpair\n"); return -EINVAL; } *handle = qpair; return 0; } static void qla_nvme_sp_ls_done(void *ptr, int res) { srb_t *sp = ptr; struct srb_iocb *nvme; struct nvmefc_ls_req *fd; struct nvme_private *priv; if (atomic_read(&sp->ref_count) == 0) { ql_log(ql_log_warn, sp->fcport->vha, 0x2123, "SP reference-count to ZERO on LS_done -- sp=%p.\n", sp); return; } if (!atomic_dec_and_test(&sp->ref_count)) return; if (res) res = -EINVAL; nvme = &sp->u.iocb_cmd; fd = nvme->u.nvme.desc; priv = fd->private; priv->comp_status = res; schedule_work(&priv->ls_work); /* work schedule doesn't need the sp */ qla2x00_rel_sp(sp); } static void qla_nvme_sp_done(void *ptr, int res) { srb_t *sp = ptr; struct srb_iocb *nvme; struct nvmefc_fcp_req *fd; nvme = &sp->u.iocb_cmd; fd = nvme->u.nvme.desc; if (!atomic_dec_and_test(&sp->ref_count)) return; if (res == QLA_SUCCESS) fd->status = 0; else fd->status = NVME_SC_INTERNAL; fd->rcv_rsplen = nvme->u.nvme.rsp_pyld_len; fd->done(fd); qla2xxx_rel_qpair_sp(sp->qpair, sp); return; } static void qla_nvme_abort_work(struct work_struct *work) { struct nvme_private *priv = container_of(work, struct nvme_private, abort_work); srb_t *sp = priv->sp; fc_port_t *fcport = sp->fcport; struct qla_hw_data *ha = fcport->vha->hw; int rval; rval = ha->isp_ops->abort_command(sp); ql_dbg(ql_dbg_io, fcport->vha, 0x212b, "%s: %s command for sp=%p, handle=%x on fcport=%p rval=%x\n", __func__, (rval != QLA_SUCCESS) ? "Failed to abort" : "Aborted", sp, sp->handle, fcport, rval); } static void qla_nvme_ls_abort(struct nvme_fc_local_port *lport, struct nvme_fc_remote_port *rport, struct nvmefc_ls_req *fd) { struct nvme_private *priv = fd->private; INIT_WORK(&priv->abort_work, qla_nvme_abort_work); schedule_work(&priv->abort_work); } static void qla_nvme_ls_complete(struct work_struct *work) { struct nvme_private *priv = container_of(work, struct nvme_private, ls_work); struct nvmefc_ls_req *fd = priv->fd; fd->done(fd, priv->comp_status); } static int qla_nvme_ls_req(struct nvme_fc_local_port *lport, struct nvme_fc_remote_port *rport, struct nvmefc_ls_req *fd) { struct qla_nvme_rport *qla_rport = rport->private; fc_port_t *fcport = qla_rport->fcport; struct srb_iocb *nvme; struct nvme_private *priv = fd->private; struct scsi_qla_host *vha; int rval = QLA_FUNCTION_FAILED; struct qla_hw_data *ha; srb_t *sp; vha = fcport->vha; ha = vha->hw; /* Alloc SRB structure */ sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC); if (!sp) return rval; sp->type = SRB_NVME_LS; sp->name = "nvme_ls"; sp->done = qla_nvme_sp_ls_done; atomic_set(&sp->ref_count, 1); nvme = &sp->u.iocb_cmd; priv->sp = sp; priv->fd = fd; INIT_WORK(&priv->ls_work, qla_nvme_ls_complete); nvme->u.nvme.desc = fd; nvme->u.nvme.dir = 0; nvme->u.nvme.dl = 0; nvme->u.nvme.cmd_len = fd->rqstlen; nvme->u.nvme.rsp_len = fd->rsplen; nvme->u.nvme.rsp_dma = fd->rspdma; nvme->u.nvme.timeout_sec = fd->timeout; nvme->u.nvme.cmd_dma = dma_map_single(&ha->pdev->dev, fd->rqstaddr, fd->rqstlen, DMA_TO_DEVICE); dma_sync_single_for_device(&ha->pdev->dev, nvme->u.nvme.cmd_dma, fd->rqstlen, DMA_TO_DEVICE); rval = qla2x00_start_sp(sp); if (rval != QLA_SUCCESS) { ql_log(ql_log_warn, vha, 0x700e, "qla2x00_start_sp failed = %d\n", rval); atomic_dec(&sp->ref_count); wake_up(&sp->nvme_ls_waitq); return rval; } return rval; } static void qla_nvme_fcp_abort(struct nvme_fc_local_port *lport, struct nvme_fc_remote_port *rport, void *hw_queue_handle, struct nvmefc_fcp_req *fd) { struct nvme_private *priv = fd->private; INIT_WORK(&priv->abort_work, qla_nvme_abort_work); schedule_work(&priv->abort_work); } static void qla_nvme_poll(struct nvme_fc_local_port *lport, void *hw_queue_handle) { struct qla_qpair *qpair = hw_queue_handle; unsigned long flags; struct scsi_qla_host *vha = lport->private; spin_lock_irqsave(&qpair->qp_lock, flags); qla24xx_process_response_queue(vha, qpair->rsp); spin_unlock_irqrestore(&qpair->qp_lock, flags); } static inline int qla2x00_start_nvme_mq(srb_t *sp) { unsigned long flags; uint32_t *clr_ptr; uint32_t index; uint32_t handle; struct cmd_nvme *cmd_pkt; uint16_t cnt, i; uint16_t req_cnt; uint16_t tot_dsds; uint16_t avail_dsds; uint32_t *cur_dsd; struct req_que *req = NULL; struct scsi_qla_host *vha = sp->fcport->vha; struct qla_hw_data *ha = vha->hw; struct qla_qpair *qpair = sp->qpair; struct srb_iocb *nvme = &sp->u.iocb_cmd; struct scatterlist *sgl, *sg; struct nvmefc_fcp_req *fd = nvme->u.nvme.desc; uint32_t rval = QLA_SUCCESS; /* Setup qpair pointers */ req = qpair->req; tot_dsds = fd->sg_cnt; /* Acquire qpair specific lock */ spin_lock_irqsave(&qpair->qp_lock, flags); /* Check for room in outstanding command list. */ handle = req->current_outstanding_cmd; for (index = 1; index < req->num_outstanding_cmds; index++) { handle++; if (handle == req->num_outstanding_cmds) handle = 1; if (!req->outstanding_cmds[handle]) break; } if (index == req->num_outstanding_cmds) { rval = -EBUSY; goto queuing_error; } req_cnt = qla24xx_calc_iocbs(vha, tot_dsds); if (req->cnt < (req_cnt + 2)) { cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr : RD_REG_DWORD_RELAXED(req->req_q_out); if (req->ring_index < cnt) req->cnt = cnt - req->ring_index; else req->cnt = req->length - (req->ring_index - cnt); if (req->cnt < (req_cnt + 2)){ rval = -EBUSY; goto queuing_error; } } if (unlikely(!fd->sqid)) { struct nvme_fc_cmd_iu *cmd = fd->cmdaddr; if (cmd->sqe.common.opcode == nvme_admin_async_event) { nvme->u.nvme.aen_op = 1; atomic_inc(&ha->nvme_active_aen_cnt); } } /* Build command packet. */ req->current_outstanding_cmd = handle; req->outstanding_cmds[handle] = sp; sp->handle = handle; req->cnt -= req_cnt; cmd_pkt = (struct cmd_nvme *)req->ring_ptr; cmd_pkt->handle = MAKE_HANDLE(req->id, handle); /* Zero out remaining portion of packet. */ clr_ptr = (uint32_t *)cmd_pkt + 2; memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8); cmd_pkt->entry_status = 0; /* Update entry type to indicate Command NVME IOCB */ cmd_pkt->entry_type = COMMAND_NVME; /* No data transfer how do we check buffer len == 0?? */ if (fd->io_dir == NVMEFC_FCP_READ) { cmd_pkt->control_flags = cpu_to_le16(CF_READ_DATA | CF_NVME_ENABLE); vha->qla_stats.input_bytes += fd->payload_length; vha->qla_stats.input_requests++; } else if (fd->io_dir == NVMEFC_FCP_WRITE) { cmd_pkt->control_flags = cpu_to_le16(CF_WRITE_DATA | CF_NVME_ENABLE); vha->qla_stats.output_bytes += fd->payload_length; vha->qla_stats.output_requests++; } else if (fd->io_dir == 0) { cmd_pkt->control_flags = cpu_to_le16(CF_NVME_ENABLE); } /* Set NPORT-ID */ cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id); cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa; cmd_pkt->port_id[1] = sp->fcport->d_id.b.area; cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain; cmd_pkt->vp_index = sp->fcport->vha->vp_idx; /* NVME RSP IU */ cmd_pkt->nvme_rsp_dsd_len = cpu_to_le16(fd->rsplen); cmd_pkt->nvme_rsp_dseg_address[0] = cpu_to_le32(LSD(fd->rspdma)); cmd_pkt->nvme_rsp_dseg_address[1] = cpu_to_le32(MSD(fd->rspdma)); /* NVME CNMD IU */ cmd_pkt->nvme_cmnd_dseg_len = cpu_to_le16(fd->cmdlen); cmd_pkt->nvme_cmnd_dseg_address[0] = cpu_to_le32(LSD(fd->cmddma)); cmd_pkt->nvme_cmnd_dseg_address[1] = cpu_to_le32(MSD(fd->cmddma)); cmd_pkt->dseg_count = cpu_to_le16(tot_dsds); cmd_pkt->byte_count = cpu_to_le32(fd->payload_length); /* One DSD is available in the Command Type NVME IOCB */ avail_dsds = 1; cur_dsd = (uint32_t *)&cmd_pkt->nvme_data_dseg_address[0]; sgl = fd->first_sgl; /* Load data segments */ for_each_sg(sgl, sg, tot_dsds, i) { dma_addr_t sle_dma; cont_a64_entry_t *cont_pkt; /* Allocate additional continuation packets? */ if (avail_dsds == 0) { /* * Five DSDs are available in the Continuation * Type 1 IOCB. */ /* Adjust ring index */ req->ring_index++; if (req->ring_index == req->length) { req->ring_index = 0; req->ring_ptr = req->ring; } else { req->ring_ptr++; } cont_pkt = (cont_a64_entry_t *)req->ring_ptr; *((uint32_t *)(&cont_pkt->entry_type)) = cpu_to_le32(CONTINUE_A64_TYPE); cur_dsd = (uint32_t *)cont_pkt->dseg_0_address; avail_dsds = 5; } sle_dma = sg_dma_address(sg); *cur_dsd++ = cpu_to_le32(LSD(sle_dma)); *cur_dsd++ = cpu_to_le32(MSD(sle_dma)); *cur_dsd++ = cpu_to_le32(sg_dma_len(sg)); avail_dsds--; } /* Set total entry count. */ cmd_pkt->entry_count = (uint8_t)req_cnt; wmb(); /* Adjust ring index. */ req->ring_index++; if (req->ring_index == req->length) { req->ring_index = 0; req->ring_ptr = req->ring; } else { req->ring_ptr++; } /* Set chip new ring index. */ WRT_REG_DWORD(req->req_q_in, req->ring_index); queuing_error: spin_unlock_irqrestore(&qpair->qp_lock, flags); return rval; } /* Post a command */ static int qla_nvme_post_cmd(struct nvme_fc_local_port *lport, struct nvme_fc_remote_port *rport, void *hw_queue_handle, struct nvmefc_fcp_req *fd) { fc_port_t *fcport; struct srb_iocb *nvme; struct scsi_qla_host *vha; int rval = -ENODEV; srb_t *sp; struct qla_qpair *qpair = hw_queue_handle; struct nvme_private *priv = fd->private; struct qla_nvme_rport *qla_rport = rport->private; if (!priv) { /* nvme association has been torn down */ return rval; } fcport = qla_rport->fcport; vha = fcport->vha; if (test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags)) return rval; /* * If we know the dev is going away while the transport is still sending * IO's return busy back to stall the IO Q. This happens when the * link goes away and fw hasn't notified us yet, but IO's are being * returned. If the dev comes back quickly we won't exhaust the IO * retry count at the core. */ if (fcport->nvme_flag & NVME_FLAG_RESETTING) return -EBUSY; /* Alloc SRB structure */ sp = qla2xxx_get_qpair_sp(qpair, fcport, GFP_ATOMIC); if (!sp) return -EBUSY; atomic_set(&sp->ref_count, 1); init_waitqueue_head(&sp->nvme_ls_waitq); priv->sp = sp; sp->type = SRB_NVME_CMD; sp->name = "nvme_cmd"; sp->done = qla_nvme_sp_done; sp->qpair = qpair; sp->vha = vha; nvme = &sp->u.iocb_cmd; nvme->u.nvme.desc = fd; rval = qla2x00_start_nvme_mq(sp); if (rval != QLA_SUCCESS) { ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x212d, "qla2x00_start_nvme_mq failed = %d\n", rval); atomic_dec(&sp->ref_count); wake_up(&sp->nvme_ls_waitq); } return rval; } static void qla_nvme_localport_delete(struct nvme_fc_local_port *lport) { struct scsi_qla_host *vha = lport->private; ql_log(ql_log_info, vha, 0x210f, "localport delete of %p completed.\n", vha->nvme_local_port); vha->nvme_local_port = NULL; complete(&vha->nvme_del_done); } static void qla_nvme_remoteport_delete(struct nvme_fc_remote_port *rport) { fc_port_t *fcport; struct qla_nvme_rport *qla_rport = rport->private, *trport; fcport = qla_rport->fcport; fcport->nvme_remote_port = NULL; fcport->nvme_flag &= ~NVME_FLAG_REGISTERED; list_for_each_entry_safe(qla_rport, trport, &fcport->vha->nvme_rport_list, list) { if (qla_rport->fcport == fcport) { list_del(&qla_rport->list); break; } } complete(&fcport->nvme_del_done); if (!test_bit(UNLOADING, &fcport->vha->dpc_flags)) { INIT_WORK(&fcport->free_work, qlt_free_session_done); schedule_work(&fcport->free_work); } fcport->nvme_flag &= ~NVME_FLAG_DELETING; ql_log(ql_log_info, fcport->vha, 0x2110, "remoteport_delete of %p completed.\n", fcport); } static struct nvme_fc_port_template qla_nvme_fc_transport = { .localport_delete = qla_nvme_localport_delete, .remoteport_delete = qla_nvme_remoteport_delete, .create_queue = qla_nvme_alloc_queue, .delete_queue = NULL, .ls_req = qla_nvme_ls_req, .ls_abort = qla_nvme_ls_abort, .fcp_io = qla_nvme_post_cmd, .fcp_abort = qla_nvme_fcp_abort, .poll_queue = qla_nvme_poll, .max_hw_queues = 8, .max_sgl_segments = 128, .max_dif_sgl_segments = 64, .dma_boundary = 0xFFFFFFFF, .local_priv_sz = 8, .remote_priv_sz = sizeof(struct qla_nvme_rport), .lsrqst_priv_sz = sizeof(struct nvme_private), .fcprqst_priv_sz = sizeof(struct nvme_private), }; #define NVME_ABORT_POLLING_PERIOD 2 static int qla_nvme_wait_on_command(srb_t *sp) { int ret = QLA_SUCCESS; wait_event_timeout(sp->nvme_ls_waitq, (atomic_read(&sp->ref_count) > 1), NVME_ABORT_POLLING_PERIOD*HZ); if (atomic_read(&sp->ref_count) > 1) ret = QLA_FUNCTION_FAILED; return ret; } void qla_nvme_abort(struct qla_hw_data *ha, struct srb *sp, int res) { int rval; if (ha->flags.fw_started) { rval = ha->isp_ops->abort_command(sp); if (!rval && !qla_nvme_wait_on_command(sp)) ql_log(ql_log_warn, NULL, 0x2112, "timed out waiting on sp=%p\n", sp); } else { sp->done(sp, res); } } static void qla_nvme_unregister_remote_port(struct work_struct *work) { struct fc_port *fcport = container_of(work, struct fc_port, nvme_del_work); struct qla_nvme_rport *qla_rport, *trport; if (!IS_ENABLED(CONFIG_NVME_FC)) return; ql_log(ql_log_warn, NULL, 0x2112, "%s: unregister remoteport on %p\n",__func__, fcport); list_for_each_entry_safe(qla_rport, trport, &fcport->vha->nvme_rport_list, list) { if (qla_rport->fcport == fcport) { ql_log(ql_log_info, fcport->vha, 0x2113, "%s: fcport=%p\n", __func__, fcport); init_completion(&fcport->nvme_del_done); nvme_fc_unregister_remoteport( fcport->nvme_remote_port); wait_for_completion(&fcport->nvme_del_done); break; } } } void qla_nvme_delete(struct scsi_qla_host *vha) { struct qla_nvme_rport *qla_rport, *trport; fc_port_t *fcport; int nv_ret; if (!IS_ENABLED(CONFIG_NVME_FC)) return; list_for_each_entry_safe(qla_rport, trport, &vha->nvme_rport_list, list) { fcport = qla_rport->fcport; ql_log(ql_log_info, fcport->vha, 0x2114, "%s: fcport=%p\n", __func__, fcport); nvme_fc_set_remoteport_devloss(fcport->nvme_remote_port, 0); } if (vha->nvme_local_port) { init_completion(&vha->nvme_del_done); ql_log(ql_log_info, vha, 0x2116, "unregister localport=%p\n", vha->nvme_local_port); nv_ret = nvme_fc_unregister_localport(vha->nvme_local_port); if (nv_ret) ql_log(ql_log_info, vha, 0x2115, "Unregister of localport failed\n"); else wait_for_completion(&vha->nvme_del_done); } } int qla_nvme_register_hba(struct scsi_qla_host *vha) { struct nvme_fc_port_template *tmpl; struct qla_hw_data *ha; struct nvme_fc_port_info pinfo; int ret = -EINVAL; if (!IS_ENABLED(CONFIG_NVME_FC)) return ret; ha = vha->hw; tmpl = &qla_nvme_fc_transport; WARN_ON(vha->nvme_local_port); WARN_ON(ha->max_req_queues < 3); qla_nvme_fc_transport.max_hw_queues = min((uint8_t)(qla_nvme_fc_transport.max_hw_queues), (uint8_t)(ha->max_req_queues - 2)); pinfo.node_name = wwn_to_u64(vha->node_name); pinfo.port_name = wwn_to_u64(vha->port_name); pinfo.port_role = FC_PORT_ROLE_NVME_INITIATOR; pinfo.port_id = vha->d_id.b24; ql_log(ql_log_info, vha, 0xffff, "register_localport: host-traddr=nn-0x%llx:pn-0x%llx on portID:%x\n", pinfo.node_name, pinfo.port_name, pinfo.port_id); qla_nvme_fc_transport.dma_boundary = vha->host->dma_boundary; ret = nvme_fc_register_localport(&pinfo, tmpl, get_device(&ha->pdev->dev), &vha->nvme_local_port); if (ret) { ql_log(ql_log_warn, vha, 0xffff, "register_localport failed: ret=%x\n", ret); } else { vha->nvme_local_port->private = vha; } return ret; }