diff options
Diffstat (limited to 'drivers/scsi/bnx2i/bnx2i_hwi.c')
| -rw-r--r-- | drivers/scsi/bnx2i/bnx2i_hwi.c | 2745 |
1 files changed, 2745 insertions, 0 deletions
diff --git a/drivers/scsi/bnx2i/bnx2i_hwi.c b/drivers/scsi/bnx2i/bnx2i_hwi.c new file mode 100644 index 000000000..6c864b093 --- /dev/null +++ b/drivers/scsi/bnx2i/bnx2i_hwi.c @@ -0,0 +1,2745 @@ +/* bnx2i_hwi.c: QLogic NetXtreme II iSCSI driver. + * + * Copyright (c) 2006 - 2013 Broadcom Corporation + * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved. + * Copyright (c) 2007, 2008 Mike Christie + * Copyright (c) 2014, QLogic Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation. + * + * Written by: Anil Veerabhadrappa (anilgv@broadcom.com) + * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com) + * Maintained by: QLogic-Storage-Upstream@qlogic.com + */ + +#include <linux/gfp.h> +#include <scsi/scsi_tcq.h> +#include <scsi/libiscsi.h> +#include "bnx2i.h" + +DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu); + +/** + * bnx2i_get_cid_num - get cid from ep + * @ep: endpoint pointer + * + * Only applicable to 57710 family of devices + */ +static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep) +{ + u32 cid; + + if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) + cid = ep->ep_cid; + else + cid = GET_CID_NUM(ep->ep_cid); + return cid; +} + + +/** + * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type + * @hba: Adapter for which adjustments is to be made + * + * Only applicable to 57710 family of devices + */ +static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba) +{ + u32 num_elements_per_pg; + + if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) || + test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) || + test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) { + if (!is_power_of_2(hba->max_sqes)) + hba->max_sqes = rounddown_pow_of_two(hba->max_sqes); + + if (!is_power_of_2(hba->max_rqes)) + hba->max_rqes = rounddown_pow_of_two(hba->max_rqes); + } + + /* Adjust each queue size if the user selection does not + * yield integral num of page buffers + */ + /* adjust SQ */ + num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE; + if (hba->max_sqes < num_elements_per_pg) + hba->max_sqes = num_elements_per_pg; + else if (hba->max_sqes % num_elements_per_pg) + hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) & + ~(num_elements_per_pg - 1); + + /* adjust CQ */ + num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_CQE_SIZE; + if (hba->max_cqes < num_elements_per_pg) + hba->max_cqes = num_elements_per_pg; + else if (hba->max_cqes % num_elements_per_pg) + hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) & + ~(num_elements_per_pg - 1); + + /* adjust RQ */ + num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_RQ_WQE_SIZE; + if (hba->max_rqes < num_elements_per_pg) + hba->max_rqes = num_elements_per_pg; + else if (hba->max_rqes % num_elements_per_pg) + hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) & + ~(num_elements_per_pg - 1); +} + + +/** + * bnx2i_get_link_state - get network interface link state + * @hba: adapter instance pointer + * + * updates adapter structure flag based on netdev state + */ +static void bnx2i_get_link_state(struct bnx2i_hba *hba) +{ + if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state)) + set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state); + else + clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state); +} + + +/** + * bnx2i_iscsi_license_error - displays iscsi license related error message + * @hba: adapter instance pointer + * @error_code: error classification + * + * Puts out an error log when driver is unable to offload iscsi connection + * due to license restrictions + */ +static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code) +{ + if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED) + /* iSCSI offload not supported on this device */ + printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n", + hba->netdev->name); + if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED) + /* iSCSI offload not supported on this LOM device */ + printk(KERN_ERR "bnx2i: LOM is not enable to " + "offload iSCSI connections, dev=%s\n", + hba->netdev->name); + set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state); +} + + +/** + * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification + * @ep: endpoint (transport identifier) structure + * @action: action, ARM or DISARM. For now only ARM_CQE is used + * + * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt + * the driver. EQ event is generated CQ index is hit or at least 1 CQ is + * outstanding and on chip timer expires + */ +int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action) +{ + struct bnx2i_5771x_cq_db *cq_db; + u16 cq_index; + u16 next_index = 0; + u32 num_active_cmds; + + /* Coalesce CQ entries only on 10G devices */ + if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) + return 0; + + /* Do not update CQ DB multiple times before firmware writes + * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious + * interrupts and other unwanted results + */ + cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt; + + if (action != CNIC_ARM_CQE_FP) + if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF) + return 0; + + if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) { + num_active_cmds = atomic_read(&ep->num_active_cmds); + if (num_active_cmds <= event_coal_min) + next_index = 1; + else { + next_index = num_active_cmds >> ep->ec_shift; + if (next_index > num_active_cmds - event_coal_min) + next_index = num_active_cmds - event_coal_min; + } + if (!next_index) + next_index = 1; + cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1; + if (cq_index > ep->qp.cqe_size * 2) + cq_index -= ep->qp.cqe_size * 2; + if (!cq_index) + cq_index = 1; + + cq_db->sqn[0] = cq_index; + } + return next_index; +} + + +/** + * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer + * @bnx2i_conn: iscsi connection on which RQ event occurred + * @ptr: driver buffer to which RQ buffer contents is to + * be copied + * @len: length of valid data inside RQ buf + * + * Copies RQ buffer contents from shared (DMA'able) memory region to + * driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and + * scsi sense info + */ +void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len) +{ + if (!bnx2i_conn->ep->qp.rqe_left) + return; + + bnx2i_conn->ep->qp.rqe_left--; + memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len); + if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) { + bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe; + bnx2i_conn->ep->qp.rq_cons_idx = 0; + } else { + bnx2i_conn->ep->qp.rq_cons_qe++; + bnx2i_conn->ep->qp.rq_cons_idx++; + } +} + + +static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn) +{ + struct bnx2i_5771x_dbell dbell; + u32 msg; + + memset(&dbell, 0, sizeof(dbell)); + dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE << + B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT); + msg = *((u32 *)&dbell); + /* TODO : get doorbell register mapping */ + writel(cpu_to_le32(msg), conn->ep->qp.ctx_base); +} + + +/** + * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell + * @bnx2i_conn: iscsi connection on which event to post + * @count: number of RQ buffer being posted to chip + * + * No need to ring hardware doorbell for 57710 family of devices + */ +void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count) +{ + struct bnx2i_5771x_sq_rq_db *rq_db; + u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000); + struct bnx2i_endpoint *ep = bnx2i_conn->ep; + + ep->qp.rqe_left += count; + ep->qp.rq_prod_idx &= 0x7FFF; + ep->qp.rq_prod_idx += count; + + if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) { + ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes; + if (!hi_bit) + ep->qp.rq_prod_idx |= 0x8000; + } else + ep->qp.rq_prod_idx |= hi_bit; + + if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { + rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt; + rq_db->prod_idx = ep->qp.rq_prod_idx; + /* no need to ring hardware doorbell for 57710 */ + } else { + writew(ep->qp.rq_prod_idx, + ep->qp.ctx_base + CNIC_RECV_DOORBELL); + } +} + + +/** + * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine + * @bnx2i_conn: iscsi connection to which new SQ entries belong + * @count: number of SQ WQEs to post + * + * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family + * of devices. For 5706/5708/5709 new SQ WQE count is written into the + * doorbell register + */ +static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count) +{ + struct bnx2i_5771x_sq_rq_db *sq_db; + struct bnx2i_endpoint *ep = bnx2i_conn->ep; + + atomic_inc(&ep->num_active_cmds); + wmb(); /* flush SQ WQE memory before the doorbell is rung */ + if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { + sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt; + sq_db->prod_idx = ep->qp.sq_prod_idx; + bnx2i_ring_577xx_doorbell(bnx2i_conn); + } else + writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL); +} + + +/** + * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters + * @bnx2i_conn: iscsi connection to which new SQ entries belong + * @count: number of SQ WQEs to post + * + * this routine will update SQ driver parameters and ring the doorbell + */ +static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn, + int count) +{ + int tmp_cnt; + + if (count == 1) { + if (bnx2i_conn->ep->qp.sq_prod_qe == + bnx2i_conn->ep->qp.sq_last_qe) + bnx2i_conn->ep->qp.sq_prod_qe = + bnx2i_conn->ep->qp.sq_first_qe; + else + bnx2i_conn->ep->qp.sq_prod_qe++; + } else { + if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <= + bnx2i_conn->ep->qp.sq_last_qe) + bnx2i_conn->ep->qp.sq_prod_qe += count; + else { + tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe - + bnx2i_conn->ep->qp.sq_prod_qe; + bnx2i_conn->ep->qp.sq_prod_qe = + &bnx2i_conn->ep->qp.sq_first_qe[count - + (tmp_cnt + 1)]; + } + } + bnx2i_conn->ep->qp.sq_prod_idx += count; + /* Ring the doorbell */ + bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx); +} + + +/** + * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware + * @bnx2i_conn: iscsi connection + * @task: transport layer's command structure pointer which is requesting + * a WQE to sent to chip for further processing + * + * prepare and post an iSCSI Login request WQE to CNIC firmware + */ +int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn, + struct iscsi_task *task) +{ + struct bnx2i_login_request *login_wqe; + struct iscsi_login_req *login_hdr; + u32 dword; + + login_hdr = (struct iscsi_login_req *)task->hdr; + login_wqe = (struct bnx2i_login_request *) + bnx2i_conn->ep->qp.sq_prod_qe; + + login_wqe->op_code = login_hdr->opcode; + login_wqe->op_attr = login_hdr->flags; + login_wqe->version_max = login_hdr->max_version; + login_wqe->version_min = login_hdr->min_version; + login_wqe->data_length = ntoh24(login_hdr->dlength); + login_wqe->isid_lo = *((u32 *) login_hdr->isid); + login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2); + login_wqe->tsih = login_hdr->tsih; + login_wqe->itt = task->itt | + (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT); + login_wqe->cid = login_hdr->cid; + + login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn); + login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn); + login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN; + + login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma; + login_wqe->resp_bd_list_addr_hi = + (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32); + + dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) | + (bnx2i_conn->gen_pdu.resp_buf_size << + ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT)); + login_wqe->resp_buffer = dword; + login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma; + login_wqe->bd_list_addr_hi = + (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32); + login_wqe->num_bds = 1; + login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ + + bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); + return 0; +} + +/** + * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware + * @bnx2i_conn: iscsi connection + * @mtask: driver command structure which is requesting + * a WQE to sent to chip for further processing + * + * prepare and post an iSCSI Login request WQE to CNIC firmware + */ +int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn, + struct iscsi_task *mtask) +{ + struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; + struct iscsi_tm *tmfabort_hdr; + struct scsi_cmnd *ref_sc; + struct iscsi_task *ctask; + struct bnx2i_tmf_request *tmfabort_wqe; + u32 dword; + u32 scsi_lun[2]; + + tmfabort_hdr = (struct iscsi_tm *)mtask->hdr; + tmfabort_wqe = (struct bnx2i_tmf_request *) + bnx2i_conn->ep->qp.sq_prod_qe; + + tmfabort_wqe->op_code = tmfabort_hdr->opcode; + tmfabort_wqe->op_attr = tmfabort_hdr->flags; + + tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14)); + tmfabort_wqe->reserved2 = 0; + tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn); + + switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) { + case ISCSI_TM_FUNC_ABORT_TASK: + case ISCSI_TM_FUNC_TASK_REASSIGN: + ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt); + if (!ctask || !ctask->sc) + /* + * the iscsi layer must have completed the cmd while + * was starting up. + * + * Note: In the case of a SCSI cmd timeout, the task's + * sc is still active; hence ctask->sc != 0 + * In this case, the task must be aborted + */ + return 0; + + ref_sc = ctask->sc; + if (ref_sc->sc_data_direction == DMA_TO_DEVICE) + dword = (ISCSI_TASK_TYPE_WRITE << + ISCSI_CMD_REQUEST_TYPE_SHIFT); + else + dword = (ISCSI_TASK_TYPE_READ << + ISCSI_CMD_REQUEST_TYPE_SHIFT); + tmfabort_wqe->ref_itt = (dword | + (tmfabort_hdr->rtt & ISCSI_ITT_MASK)); + break; + default: + tmfabort_wqe->ref_itt = RESERVED_ITT; + } + memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun)); + tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]); + tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]); + + tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn); + + tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma; + tmfabort_wqe->bd_list_addr_hi = (u32) + ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); + tmfabort_wqe->num_bds = 1; + tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ + + bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); + return 0; +} + +/** + * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware + * @bnx2i_conn: iscsi connection + * @mtask: driver command structure which is requesting + * a WQE to sent to chip for further processing + * + * prepare and post an iSCSI Text request WQE to CNIC firmware + */ +int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn, + struct iscsi_task *mtask) +{ + struct bnx2i_text_request *text_wqe; + struct iscsi_text *text_hdr; + u32 dword; + + text_hdr = (struct iscsi_text *)mtask->hdr; + text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe; + + memset(text_wqe, 0, sizeof(struct bnx2i_text_request)); + + text_wqe->op_code = text_hdr->opcode; + text_wqe->op_attr = text_hdr->flags; + text_wqe->data_length = ntoh24(text_hdr->dlength); + text_wqe->itt = mtask->itt | + (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT); + text_wqe->ttt = be32_to_cpu(text_hdr->ttt); + + text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn); + + text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma; + text_wqe->resp_bd_list_addr_hi = + (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32); + + dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) | + (bnx2i_conn->gen_pdu.resp_buf_size << + ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT)); + text_wqe->resp_buffer = dword; + text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma; + text_wqe->bd_list_addr_hi = + (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32); + text_wqe->num_bds = 1; + text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ + + bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); + return 0; +} + + +/** + * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware + * @bnx2i_conn: iscsi connection + * @cmd: driver command structure which is requesting + * a WQE to sent to chip for further processing + * + * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware + */ +int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn, + struct bnx2i_cmd *cmd) +{ + struct bnx2i_cmd_request *scsi_cmd_wqe; + + scsi_cmd_wqe = (struct bnx2i_cmd_request *) + bnx2i_conn->ep->qp.sq_prod_qe; + memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request)); + scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ + + bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); + return 0; +} + +/** + * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware + * @bnx2i_conn: iscsi connection + * @task: transport layer's command structure pointer which is + * requesting a WQE to sent to chip for further processing + * @datap: payload buffer pointer + * @data_len: payload data length + * @unsol: indicated whether nopout pdu is unsolicited pdu or + * in response to target's NOPIN w/ TTT != FFFFFFFF + * + * prepare and post a nopout request WQE to CNIC firmware + */ +int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn, + struct iscsi_task *task, + char *datap, int data_len, int unsol) +{ + struct bnx2i_endpoint *ep = bnx2i_conn->ep; + struct bnx2i_nop_out_request *nopout_wqe; + struct iscsi_nopout *nopout_hdr; + + nopout_hdr = (struct iscsi_nopout *)task->hdr; + nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe; + + memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request)); + + nopout_wqe->op_code = nopout_hdr->opcode; + nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL; + memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8); + + /* 57710 requires LUN field to be swapped */ + if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) + swap(nopout_wqe->lun[0], nopout_wqe->lun[1]); + + nopout_wqe->itt = ((u16)task->itt | + (ISCSI_TASK_TYPE_MPATH << + ISCSI_TMF_REQUEST_TYPE_SHIFT)); + nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt); + nopout_wqe->flags = 0; + if (!unsol) + nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION; + else if (nopout_hdr->itt == RESERVED_ITT) + nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION; + + nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn); + nopout_wqe->data_length = data_len; + if (data_len) { + /* handle payload data, not required in first release */ + printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n"); + } else { + nopout_wqe->bd_list_addr_lo = (u32) + bnx2i_conn->hba->mp_bd_dma; + nopout_wqe->bd_list_addr_hi = + (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); + nopout_wqe->num_bds = 1; + } + nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ + + bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); + return 0; +} + + +/** + * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware + * @bnx2i_conn: iscsi connection + * @task: transport layer's command structure pointer which is + * requesting a WQE to sent to chip for further processing + * + * prepare and post logout request WQE to CNIC firmware + */ +int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn, + struct iscsi_task *task) +{ + struct bnx2i_logout_request *logout_wqe; + struct iscsi_logout *logout_hdr; + + logout_hdr = (struct iscsi_logout *)task->hdr; + + logout_wqe = (struct bnx2i_logout_request *) + bnx2i_conn->ep->qp.sq_prod_qe; + memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request)); + + logout_wqe->op_code = logout_hdr->opcode; + logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn); + logout_wqe->op_attr = + logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE; + logout_wqe->itt = ((u16)task->itt | + (ISCSI_TASK_TYPE_MPATH << + ISCSI_LOGOUT_REQUEST_TYPE_SHIFT)); + logout_wqe->data_length = 0; + logout_wqe->cid = 0; + + logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma; + logout_wqe->bd_list_addr_hi = (u32) + ((u64) bnx2i_conn->hba->mp_bd_dma >> 32); + logout_wqe->num_bds = 1; + logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */ + + bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT; + + bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1); + return 0; +} + + +/** + * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware + * @conn: iscsi connection which requires iscsi parameter update + * + * sends down iSCSI Conn Update request to move iSCSI conn to FFP + */ +void bnx2i_update_iscsi_conn(struct iscsi_conn *conn) +{ + struct bnx2i_conn *bnx2i_conn = conn->dd_data; + struct bnx2i_hba *hba = bnx2i_conn->hba; + struct kwqe *kwqe_arr[2]; + struct iscsi_kwqe_conn_update *update_wqe; + struct iscsi_kwqe_conn_update conn_update_kwqe; + + update_wqe = &conn_update_kwqe; + + update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN; + update_wqe->hdr.flags = + (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); + + /* 5771x requires conn context id to be passed as is */ + if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type)) + update_wqe->context_id = bnx2i_conn->ep->ep_cid; + else + update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7); + update_wqe->conn_flags = 0; + if (conn->hdrdgst_en) + update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST; + if (conn->datadgst_en) + update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST; + if (conn->session->initial_r2t_en) + update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T; + if (conn->session->imm_data_en) + update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA; + + update_wqe->max_send_pdu_length = conn->max_xmit_dlength; + update_wqe->max_recv_pdu_length = conn->max_recv_dlength; + update_wqe->first_burst_length = conn->session->first_burst; + update_wqe->max_burst_length = conn->session->max_burst; + update_wqe->exp_stat_sn = conn->exp_statsn; + update_wqe->max_outstanding_r2ts = conn->session->max_r2t; + update_wqe->session_error_recovery_level = conn->session->erl; + iscsi_conn_printk(KERN_ALERT, conn, + "bnx2i: conn update - MBL 0x%x FBL 0x%x" + "MRDSL_I 0x%x MRDSL_T 0x%x \n", + update_wqe->max_burst_length, + update_wqe->first_burst_length, + update_wqe->max_recv_pdu_length, + update_wqe->max_send_pdu_length); + + kwqe_arr[0] = (struct kwqe *) update_wqe; + if (hba->cnic && hba->cnic->submit_kwqes) + hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1); +} + + +/** + * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware + * @t: timer context used to fetch the endpoint (transport + * handle) structure pointer + * + * routine to handle connection offload/destroy request timeout + */ +void bnx2i_ep_ofld_timer(struct timer_list *t) +{ + struct bnx2i_endpoint *ep = from_timer(ep, t, ofld_timer); + + if (ep->state == EP_STATE_OFLD_START) { + printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n"); + ep->state = EP_STATE_OFLD_FAILED; + } else if (ep->state == EP_STATE_DISCONN_START) { + printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n"); + ep->state = EP_STATE_DISCONN_TIMEDOUT; + } else if (ep->state == EP_STATE_CLEANUP_START) { + printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n"); + ep->state = EP_STATE_CLEANUP_FAILED; + } + + wake_up_interruptible(&ep->ofld_wait); +} + + +static int bnx2i_power_of2(u32 val) +{ + u32 power = 0; + if (val & (val - 1)) + return power; + val--; + while (val) { + val = val >> 1; + power++; + } + return power; +} + + +/** + * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request + * @hba: adapter structure pointer + * @cmd: driver command structure which is requesting + * a WQE to sent to chip for further processing + * + * prepares and posts CONN_OFLD_REQ1/2 KWQE + */ +void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd) +{ + struct bnx2i_cleanup_request *cmd_cleanup; + + cmd_cleanup = + (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe; + memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request)); + + cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST; + cmd_cleanup->itt = cmd->req.itt; + cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */ + + bnx2i_ring_dbell_update_sq_params(cmd->conn, 1); +} + + +/** + * bnx2i_send_conn_destroy - initiates iscsi connection teardown process + * @hba: adapter structure pointer + * @ep: endpoint (transport identifier) structure + * + * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate + * iscsi connection context clean-up process + */ +int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) +{ + struct kwqe *kwqe_arr[2]; + struct iscsi_kwqe_conn_destroy conn_cleanup; + int rc = -EINVAL; + + memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy)); + + conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN; + conn_cleanup.hdr.flags = + (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); + /* 5771x requires conn context id to be passed as is */ + if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) + conn_cleanup.context_id = ep->ep_cid; + else + conn_cleanup.context_id = (ep->ep_cid >> 7); + + conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid; + + kwqe_arr[0] = (struct kwqe *) &conn_cleanup; + if (hba->cnic && hba->cnic->submit_kwqes) + rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1); + + return rc; +} + + +/** + * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process + * @hba: adapter structure pointer + * @ep: endpoint (transport identifier) structure + * + * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE + */ +static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba, + struct bnx2i_endpoint *ep) +{ + struct kwqe *kwqe_arr[2]; + struct iscsi_kwqe_conn_offload1 ofld_req1; + struct iscsi_kwqe_conn_offload2 ofld_req2; + dma_addr_t dma_addr; + int num_kwqes = 2; + u32 *ptbl; + int rc = -EINVAL; + + ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1; + ofld_req1.hdr.flags = + (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); + + ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid; + + dma_addr = ep->qp.sq_pgtbl_phys; + ofld_req1.sq_page_table_addr_lo = (u32) dma_addr; + ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); + + dma_addr = ep->qp.cq_pgtbl_phys; + ofld_req1.cq_page_table_addr_lo = (u32) dma_addr; + ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); + + ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2; + ofld_req2.hdr.flags = + (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); + + dma_addr = ep->qp.rq_pgtbl_phys; + ofld_req2.rq_page_table_addr_lo = (u32) dma_addr; + ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); + + ptbl = (u32 *) ep->qp.sq_pgtbl_virt; + + ofld_req2.sq_first_pte.hi = *ptbl++; + ofld_req2.sq_first_pte.lo = *ptbl; + + ptbl = (u32 *) ep->qp.cq_pgtbl_virt; + ofld_req2.cq_first_pte.hi = *ptbl++; + ofld_req2.cq_first_pte.lo = *ptbl; + + kwqe_arr[0] = (struct kwqe *) &ofld_req1; + kwqe_arr[1] = (struct kwqe *) &ofld_req2; + ofld_req2.num_additional_wqes = 0; + + if (hba->cnic && hba->cnic->submit_kwqes) + rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes); + + return rc; +} + + +/** + * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation + * @hba: adapter structure pointer + * @ep: endpoint (transport identifier) structure + * + * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE + */ +static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba, + struct bnx2i_endpoint *ep) +{ + struct kwqe *kwqe_arr[5]; + struct iscsi_kwqe_conn_offload1 ofld_req1; + struct iscsi_kwqe_conn_offload2 ofld_req2; + struct iscsi_kwqe_conn_offload3 ofld_req3[1]; + dma_addr_t dma_addr; + int num_kwqes = 2; + u32 *ptbl; + int rc = -EINVAL; + + ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1; + ofld_req1.hdr.flags = + (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); + + ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid; + + dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE; + ofld_req1.sq_page_table_addr_lo = (u32) dma_addr; + ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); + + dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE; + ofld_req1.cq_page_table_addr_lo = (u32) dma_addr; + ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); + + ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2; + ofld_req2.hdr.flags = + (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); + + dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE; + ofld_req2.rq_page_table_addr_lo = (u32) dma_addr; + ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32); + + ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE); + ofld_req2.sq_first_pte.hi = *ptbl++; + ofld_req2.sq_first_pte.lo = *ptbl; + + ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE); + ofld_req2.cq_first_pte.hi = *ptbl++; + ofld_req2.cq_first_pte.lo = *ptbl; + + kwqe_arr[0] = (struct kwqe *) &ofld_req1; + kwqe_arr[1] = (struct kwqe *) &ofld_req2; + + ofld_req2.num_additional_wqes = 1; + memset(ofld_req3, 0x00, sizeof(ofld_req3[0])); + ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE); + ofld_req3[0].qp_first_pte[0].hi = *ptbl++; + ofld_req3[0].qp_first_pte[0].lo = *ptbl; + + kwqe_arr[2] = (struct kwqe *) ofld_req3; + /* need if we decide to go with multiple KCQE's per conn */ + num_kwqes += 1; + + if (hba->cnic && hba->cnic->submit_kwqes) + rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes); + + return rc; +} + +/** + * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process + * + * @hba: adapter structure pointer + * @ep: endpoint (transport identifier) structure + * + * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE + */ +int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) +{ + int rc; + + if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) + rc = bnx2i_5771x_send_conn_ofld_req(hba, ep); + else + rc = bnx2i_570x_send_conn_ofld_req(hba, ep); + + return rc; +} + + +/** + * setup_qp_page_tables - iscsi QP page table setup function + * @ep: endpoint (transport identifier) structure + * + * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires + * 64-bit address in big endian format. Whereas 10G/sec (57710) requires + * PT in little endian format + */ +static void setup_qp_page_tables(struct bnx2i_endpoint *ep) +{ + int num_pages; + u32 *ptbl; + dma_addr_t page; + int cnic_dev_10g; + + if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) + cnic_dev_10g = 1; + else + cnic_dev_10g = 0; + + /* SQ page table */ + memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size); + num_pages = ep->qp.sq_mem_size / CNIC_PAGE_SIZE; + page = ep->qp.sq_phys; + + if (cnic_dev_10g) + ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE); + else + ptbl = (u32 *) ep->qp.sq_pgtbl_virt; + while (num_pages--) { + if (cnic_dev_10g) { + /* PTE is written in little endian format for 57710 */ + *ptbl = (u32) page; + ptbl++; + *ptbl = (u32) ((u64) page >> 32); + ptbl++; + page += CNIC_PAGE_SIZE; + } else { + /* PTE is written in big endian format for + * 5706/5708/5709 devices */ + *ptbl = (u32) ((u64) page >> 32); + ptbl++; + *ptbl = (u32) page; + ptbl++; + page += CNIC_PAGE_SIZE; + } + } + + /* RQ page table */ + memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size); + num_pages = ep->qp.rq_mem_size / CNIC_PAGE_SIZE; + page = ep->qp.rq_phys; + + if (cnic_dev_10g) + ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE); + else + ptbl = (u32 *) ep->qp.rq_pgtbl_virt; + while (num_pages--) { + if (cnic_dev_10g) { + /* PTE is written in little endian format for 57710 */ + *ptbl = (u32) page; + ptbl++; + *ptbl = (u32) ((u64) page >> 32); + ptbl++; + page += CNIC_PAGE_SIZE; + } else { + /* PTE is written in big endian format for + * 5706/5708/5709 devices */ + *ptbl = (u32) ((u64) page >> 32); + ptbl++; + *ptbl = (u32) page; + ptbl++; + page += CNIC_PAGE_SIZE; + } + } + + /* CQ page table */ + memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size); + num_pages = ep->qp.cq_mem_size / CNIC_PAGE_SIZE; + page = ep->qp.cq_phys; + + if (cnic_dev_10g) + ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE); + else + ptbl = (u32 *) ep->qp.cq_pgtbl_virt; + while (num_pages--) { + if (cnic_dev_10g) { + /* PTE is written in little endian format for 57710 */ + *ptbl = (u32) page; + ptbl++; + *ptbl = (u32) ((u64) page >> 32); + ptbl++; + page += CNIC_PAGE_SIZE; + } else { + /* PTE is written in big endian format for + * 5706/5708/5709 devices */ + *ptbl = (u32) ((u64) page >> 32); + ptbl++; + *ptbl = (u32) page; + ptbl++; + page += CNIC_PAGE_SIZE; + } + } +} + + +/** + * bnx2i_alloc_qp_resc - allocates required resources for QP. + * @hba: adapter structure pointer + * @ep: endpoint (transport identifier) structure + * + * Allocate QP (transport layer for iSCSI connection) resources, DMA'able + * memory for SQ/RQ/CQ and page tables. EP structure elements such + * as producer/consumer indexes/pointers, queue sizes and page table + * contents are setup + */ +int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) +{ + struct bnx2i_5771x_cq_db *cq_db; + + ep->hba = hba; + ep->conn = NULL; + ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0; + + /* Allocate page table memory for SQ which is page aligned */ + ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE; + ep->qp.sq_mem_size = + (ep->qp.sq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; + ep->qp.sq_pgtbl_size = + (ep->qp.sq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *); + ep->qp.sq_pgtbl_size = + (ep->qp.sq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; + + ep->qp.sq_pgtbl_virt = + dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size, + &ep->qp.sq_pgtbl_phys, GFP_KERNEL); + if (!ep->qp.sq_pgtbl_virt) { + printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n", + ep->qp.sq_pgtbl_size); + goto mem_alloc_err; + } + + /* Allocate memory area for actual SQ element */ + ep->qp.sq_virt = + dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size, + &ep->qp.sq_phys, GFP_KERNEL); + if (!ep->qp.sq_virt) { + printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n", + ep->qp.sq_mem_size); + goto mem_alloc_err; + } + + ep->qp.sq_first_qe = ep->qp.sq_virt; + ep->qp.sq_prod_qe = ep->qp.sq_first_qe; + ep->qp.sq_cons_qe = ep->qp.sq_first_qe; + ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1]; + ep->qp.sq_prod_idx = 0; + ep->qp.sq_cons_idx = 0; + ep->qp.sqe_left = hba->max_sqes; + + /* Allocate page table memory for CQ which is page aligned */ + ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE; + ep->qp.cq_mem_size = + (ep->qp.cq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; + ep->qp.cq_pgtbl_size = + (ep->qp.cq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *); + ep->qp.cq_pgtbl_size = + (ep->qp.cq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; + + ep->qp.cq_pgtbl_virt = + dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, + &ep->qp.cq_pgtbl_phys, GFP_KERNEL); + if (!ep->qp.cq_pgtbl_virt) { + printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n", + ep->qp.cq_pgtbl_size); + goto mem_alloc_err; + } + + /* Allocate memory area for actual CQ element */ + ep->qp.cq_virt = + dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, + &ep->qp.cq_phys, GFP_KERNEL); + if (!ep->qp.cq_virt) { + printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n", + ep->qp.cq_mem_size); + goto mem_alloc_err; + } + + ep->qp.cq_first_qe = ep->qp.cq_virt; + ep->qp.cq_prod_qe = ep->qp.cq_first_qe; + ep->qp.cq_cons_qe = ep->qp.cq_first_qe; + ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1]; + ep->qp.cq_prod_idx = 0; + ep->qp.cq_cons_idx = 0; + ep->qp.cqe_left = hba->max_cqes; + ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN; + ep->qp.cqe_size = hba->max_cqes; + + /* Invalidate all EQ CQE index, req only for 57710 */ + cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt; + memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS); + + /* Allocate page table memory for RQ which is page aligned */ + ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE; + ep->qp.rq_mem_size = + (ep->qp.rq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; + ep->qp.rq_pgtbl_size = + (ep->qp.rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *); + ep->qp.rq_pgtbl_size = + (ep->qp.rq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK; + + ep->qp.rq_pgtbl_virt = + dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, + &ep->qp.rq_pgtbl_phys, GFP_KERNEL); + if (!ep->qp.rq_pgtbl_virt) { + printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n", + ep->qp.rq_pgtbl_size); + goto mem_alloc_err; + } + + /* Allocate memory area for actual RQ element */ + ep->qp.rq_virt = + dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, + &ep->qp.rq_phys, GFP_KERNEL); + if (!ep->qp.rq_virt) { + printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n", + ep->qp.rq_mem_size); + goto mem_alloc_err; + } + + ep->qp.rq_first_qe = ep->qp.rq_virt; + ep->qp.rq_prod_qe = ep->qp.rq_first_qe; + ep->qp.rq_cons_qe = ep->qp.rq_first_qe; + ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1]; + ep->qp.rq_prod_idx = 0x8000; + ep->qp.rq_cons_idx = 0; + ep->qp.rqe_left = hba->max_rqes; + + setup_qp_page_tables(ep); + + return 0; + +mem_alloc_err: + bnx2i_free_qp_resc(hba, ep); + return -ENOMEM; +} + + + +/** + * bnx2i_free_qp_resc - free memory resources held by QP + * @hba: adapter structure pointer + * @ep: endpoint (transport identifier) structure + * + * Free QP resources - SQ/RQ/CQ memory and page tables. + */ +void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) +{ + if (ep->qp.ctx_base) { + iounmap(ep->qp.ctx_base); + ep->qp.ctx_base = NULL; + } + /* Free SQ mem */ + if (ep->qp.sq_pgtbl_virt) { + dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size, + ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys); + ep->qp.sq_pgtbl_virt = NULL; + ep->qp.sq_pgtbl_phys = 0; + } + if (ep->qp.sq_virt) { + dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size, + ep->qp.sq_virt, ep->qp.sq_phys); + ep->qp.sq_virt = NULL; + ep->qp.sq_phys = 0; + } + + /* Free RQ mem */ + if (ep->qp.rq_pgtbl_virt) { + dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size, + ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys); + ep->qp.rq_pgtbl_virt = NULL; + ep->qp.rq_pgtbl_phys = 0; + } + if (ep->qp.rq_virt) { + dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size, + ep->qp.rq_virt, ep->qp.rq_phys); + ep->qp.rq_virt = NULL; + ep->qp.rq_phys = 0; + } + + /* Free CQ mem */ + if (ep->qp.cq_pgtbl_virt) { + dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size, + ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys); + ep->qp.cq_pgtbl_virt = NULL; + ep->qp.cq_pgtbl_phys = 0; + } + if (ep->qp.cq_virt) { + dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size, + ep->qp.cq_virt, ep->qp.cq_phys); + ep->qp.cq_virt = NULL; + ep->qp.cq_phys = 0; + } +} + + +/** + * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w + * @hba: adapter structure pointer + * + * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w + * This results in iSCSi support validation and on-chip context manager + * initialization. Firmware completes this handshake with a CQE carrying + * the result of iscsi support validation. Parameter carried by + * iscsi init request determines the number of offloaded connection and + * tolerance level for iscsi protocol violation this hba/chip can support + */ +int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba) +{ + struct kwqe *kwqe_arr[3]; + struct iscsi_kwqe_init1 iscsi_init; + struct iscsi_kwqe_init2 iscsi_init2; + int rc = 0; + u64 mask64; + + memset(&iscsi_init, 0x00, sizeof(struct iscsi_kwqe_init1)); + memset(&iscsi_init2, 0x00, sizeof(struct iscsi_kwqe_init2)); + + bnx2i_adjust_qp_size(hba); + + iscsi_init.flags = + (CNIC_PAGE_BITS - 8) << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT; + if (en_tcp_dack) + iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE; + iscsi_init.reserved0 = 0; + iscsi_init.num_cqs = 1; + iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1; + iscsi_init.hdr.flags = + (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); + + iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma; + iscsi_init.dummy_buffer_addr_hi = + (u32) ((u64) hba->dummy_buf_dma >> 32); + + hba->num_ccell = hba->max_sqes >> 1; + hba->ctx_ccell_tasks = + ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16)); + iscsi_init.num_ccells_per_conn = hba->num_ccell; + iscsi_init.num_tasks_per_conn = hba->max_sqes; + iscsi_init.sq_wqes_per_page = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE; + iscsi_init.sq_num_wqes = hba->max_sqes; + iscsi_init.cq_log_wqes_per_page = + (u8) bnx2i_power_of2(CNIC_PAGE_SIZE / BNX2I_CQE_SIZE); + iscsi_init.cq_num_wqes = hba->max_cqes; + iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE + + (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE; + iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE + + (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE; + iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE; + iscsi_init.rq_num_wqes = hba->max_rqes; + + + iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2; + iscsi_init2.hdr.flags = + (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT); + iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1; + mask64 = 0x0ULL; + mask64 |= ( + /* CISCO MDS */ + (1UL << + ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) | + /* HP MSA1510i */ + (1UL << + ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) | + /* EMC */ + (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN)); + if (error_mask1) { + iscsi_init2.error_bit_map[0] = error_mask1; + mask64 ^= (u32)(mask64); + mask64 |= error_mask1; + } else + iscsi_init2.error_bit_map[0] = (u32) mask64; + + if (error_mask2) { + iscsi_init2.error_bit_map[1] = error_mask2; + mask64 &= 0xffffffff; + mask64 |= ((u64)error_mask2 << 32); + } else + iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32); + + iscsi_error_mask = mask64; + + kwqe_arr[0] = (struct kwqe *) &iscsi_init; + kwqe_arr[1] = (struct kwqe *) &iscsi_init2; + + if (hba->cnic && hba->cnic->submit_kwqes) + rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2); + return rc; +} + + +/** + * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion. + * @session: iscsi session + * @bnx2i_conn: bnx2i connection + * @cqe: pointer to newly DMA'ed CQE entry for processing + * + * process SCSI CMD Response CQE & complete the request to SCSI-ML + */ +int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session, + struct bnx2i_conn *bnx2i_conn, + struct cqe *cqe) +{ + struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; + struct bnx2i_hba *hba = bnx2i_conn->hba; + struct bnx2i_cmd_response *resp_cqe; + struct bnx2i_cmd *bnx2i_cmd; + struct iscsi_task *task; + struct iscsi_scsi_rsp *hdr; + u32 datalen = 0; + + resp_cqe = (struct bnx2i_cmd_response *)cqe; + spin_lock_bh(&session->back_lock); + task = iscsi_itt_to_task(conn, + resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX); + if (!task) + goto fail; + + bnx2i_cmd = task->dd_data; + + if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) { + conn->datain_pdus_cnt += + resp_cqe->task_stat.read_stat.num_data_ins; + conn->rxdata_octets += + bnx2i_cmd->req.total_data_transfer_length; + ADD_STATS_64(hba, rx_pdus, + resp_cqe->task_stat.read_stat.num_data_ins); + ADD_STATS_64(hba, rx_bytes, + bnx2i_cmd->req.total_data_transfer_length); + } else { + conn->dataout_pdus_cnt += + resp_cqe->task_stat.write_stat.num_data_outs; + conn->r2t_pdus_cnt += + resp_cqe->task_stat.write_stat.num_r2ts; + conn->txdata_octets += + bnx2i_cmd->req.total_data_transfer_length; + ADD_STATS_64(hba, tx_pdus, + resp_cqe->task_stat.write_stat.num_data_outs); + ADD_STATS_64(hba, tx_bytes, + bnx2i_cmd->req.total_data_transfer_length); + ADD_STATS_64(hba, rx_pdus, + resp_cqe->task_stat.write_stat.num_r2ts); + } + bnx2i_iscsi_unmap_sg_list(bnx2i_cmd); + + hdr = (struct iscsi_scsi_rsp *)task->hdr; + resp_cqe = (struct bnx2i_cmd_response *)cqe; + hdr->opcode = resp_cqe->op_code; + hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn); + hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn); + hdr->response = resp_cqe->response; + hdr->cmd_status = resp_cqe->status; + hdr->flags = resp_cqe->response_flags; + hdr->residual_count = cpu_to_be32(resp_cqe->residual_count); + + if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN) + goto done; + + if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) { + datalen = resp_cqe->data_length; + if (datalen < 2) + goto done; + + if (datalen > BNX2I_RQ_WQE_SIZE) { + iscsi_conn_printk(KERN_ERR, conn, + "sense data len %d > RQ sz\n", + datalen); + datalen = BNX2I_RQ_WQE_SIZE; + } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) { + iscsi_conn_printk(KERN_ERR, conn, + "sense data len %d > conn data\n", + datalen); + datalen = ISCSI_DEF_MAX_RECV_SEG_LEN; + } + + bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen); + bnx2i_put_rq_buf(bnx2i_cmd->conn, 1); + } + +done: + __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, + conn->data, datalen); +fail: + spin_unlock_bh(&session->back_lock); + return 0; +} + + +/** + * bnx2i_process_login_resp - this function handles iscsi login response + * @session: iscsi session pointer + * @bnx2i_conn: iscsi connection pointer + * @cqe: pointer to newly DMA'ed CQE entry for processing + * + * process Login Response CQE & complete it to open-iscsi user daemon + */ +static int bnx2i_process_login_resp(struct iscsi_session *session, + struct bnx2i_conn *bnx2i_conn, + struct cqe *cqe) +{ + struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; + struct iscsi_task *task; + struct bnx2i_login_response *login; + struct iscsi_login_rsp *resp_hdr; + int pld_len; + int pad_len; + + login = (struct bnx2i_login_response *) cqe; + spin_lock(&session->back_lock); + task = iscsi_itt_to_task(conn, + login->itt & ISCSI_LOGIN_RESPONSE_INDEX); + if (!task) + goto done; + + resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; + memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); + resp_hdr->opcode = login->op_code; + resp_hdr->flags = login->response_flags; + resp_hdr->max_version = login->version_max; + resp_hdr->active_version = login->version_active; + resp_hdr->hlength = 0; + + hton24(resp_hdr->dlength, login->data_length); + memcpy(resp_hdr->isid, &login->isid_lo, 6); + resp_hdr->tsih = cpu_to_be16(login->tsih); + resp_hdr->itt = task->hdr->itt; + resp_hdr->statsn = cpu_to_be32(login->stat_sn); + resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn); + resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn); + resp_hdr->status_class = login->status_class; + resp_hdr->status_detail = login->status_detail; + pld_len = login->data_length; + bnx2i_conn->gen_pdu.resp_wr_ptr = + bnx2i_conn->gen_pdu.resp_buf + pld_len; + + pad_len = 0; + if (pld_len & 0x3) + pad_len = 4 - (pld_len % 4); + + if (pad_len) { + int i = 0; + for (i = 0; i < pad_len; i++) { + bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0; + bnx2i_conn->gen_pdu.resp_wr_ptr++; + } + } + + __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, + bnx2i_conn->gen_pdu.resp_buf, + bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf); +done: + spin_unlock(&session->back_lock); + return 0; +} + + +/** + * bnx2i_process_text_resp - this function handles iscsi text response + * @session: iscsi session pointer + * @bnx2i_conn: iscsi connection pointer + * @cqe: pointer to newly DMA'ed CQE entry for processing + * + * process iSCSI Text Response CQE& complete it to open-iscsi user daemon + */ +static int bnx2i_process_text_resp(struct iscsi_session *session, + struct bnx2i_conn *bnx2i_conn, + struct cqe *cqe) +{ + struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; + struct iscsi_task *task; + struct bnx2i_text_response *text; + struct iscsi_text_rsp *resp_hdr; + int pld_len; + int pad_len; + + text = (struct bnx2i_text_response *) cqe; + spin_lock(&session->back_lock); + task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX); + if (!task) + goto done; + + resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr; + memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); + resp_hdr->opcode = text->op_code; + resp_hdr->flags = text->response_flags; + resp_hdr->hlength = 0; + + hton24(resp_hdr->dlength, text->data_length); + resp_hdr->itt = task->hdr->itt; + resp_hdr->ttt = cpu_to_be32(text->ttt); + resp_hdr->statsn = task->hdr->exp_statsn; + resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn); + resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn); + pld_len = text->data_length; + bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf + + pld_len; + pad_len = 0; + if (pld_len & 0x3) + pad_len = 4 - (pld_len % 4); + + if (pad_len) { + int i = 0; + for (i = 0; i < pad_len; i++) { + bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0; + bnx2i_conn->gen_pdu.resp_wr_ptr++; + } + } + __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, + bnx2i_conn->gen_pdu.resp_buf, + bnx2i_conn->gen_pdu.resp_wr_ptr - + bnx2i_conn->gen_pdu.resp_buf); +done: + spin_unlock(&session->back_lock); + return 0; +} + + +/** + * bnx2i_process_tmf_resp - this function handles iscsi TMF response + * @session: iscsi session pointer + * @bnx2i_conn: iscsi connection pointer + * @cqe: pointer to newly DMA'ed CQE entry for processing + * + * process iSCSI TMF Response CQE and wake up the driver eh thread. + */ +static int bnx2i_process_tmf_resp(struct iscsi_session *session, + struct bnx2i_conn *bnx2i_conn, + struct cqe *cqe) +{ + struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; + struct iscsi_task *task; + struct bnx2i_tmf_response *tmf_cqe; + struct iscsi_tm_rsp *resp_hdr; + + tmf_cqe = (struct bnx2i_tmf_response *)cqe; + spin_lock(&session->back_lock); + task = iscsi_itt_to_task(conn, + tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX); + if (!task) + goto done; + + resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; + memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); + resp_hdr->opcode = tmf_cqe->op_code; + resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn); + resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn); + resp_hdr->itt = task->hdr->itt; + resp_hdr->response = tmf_cqe->response; + + __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); +done: + spin_unlock(&session->back_lock); + return 0; +} + +/** + * bnx2i_process_logout_resp - this function handles iscsi logout response + * @session: iscsi session pointer + * @bnx2i_conn: iscsi connection pointer + * @cqe: pointer to newly DMA'ed CQE entry for processing + * + * process iSCSI Logout Response CQE & make function call to + * notify the user daemon. + */ +static int bnx2i_process_logout_resp(struct iscsi_session *session, + struct bnx2i_conn *bnx2i_conn, + struct cqe *cqe) +{ + struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; + struct iscsi_task *task; + struct bnx2i_logout_response *logout; + struct iscsi_logout_rsp *resp_hdr; + + logout = (struct bnx2i_logout_response *) cqe; + spin_lock(&session->back_lock); + task = iscsi_itt_to_task(conn, + logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX); + if (!task) + goto done; + + resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr; + memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); + resp_hdr->opcode = logout->op_code; + resp_hdr->flags = logout->response; + resp_hdr->hlength = 0; + + resp_hdr->itt = task->hdr->itt; + resp_hdr->statsn = task->hdr->exp_statsn; + resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn); + resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn); + + resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait); + resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain); + + __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); + + bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD; +done: + spin_unlock(&session->back_lock); + return 0; +} + +/** + * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE + * @session: iscsi session pointer + * @bnx2i_conn: iscsi connection pointer + * @cqe: pointer to newly DMA'ed CQE entry for processing + * + * process iSCSI NOPIN local completion CQE, frees IIT and command structures + */ +static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session, + struct bnx2i_conn *bnx2i_conn, + struct cqe *cqe) +{ + struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; + struct bnx2i_nop_in_msg *nop_in; + struct iscsi_task *task; + + nop_in = (struct bnx2i_nop_in_msg *)cqe; + spin_lock(&session->back_lock); + task = iscsi_itt_to_task(conn, + nop_in->itt & ISCSI_NOP_IN_MSG_INDEX); + if (task) + __iscsi_put_task(task); + spin_unlock(&session->back_lock); +} + +/** + * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd + * @bnx2i_conn: iscsi connection + * + * Firmware advances RQ producer index for every unsolicited PDU even if + * payload data length is '0'. This function makes corresponding + * adjustments on the driver side to match this f/w behavior + */ +static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn) +{ + char dummy_rq_data[2]; + bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1); + bnx2i_put_rq_buf(bnx2i_conn, 1); +} + + +/** + * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE + * @session: iscsi session pointer + * @bnx2i_conn: iscsi connection pointer + * @cqe: pointer to newly DMA'ed CQE entry for processing + * + * process iSCSI target's proactive iSCSI NOPIN request + */ +static int bnx2i_process_nopin_mesg(struct iscsi_session *session, + struct bnx2i_conn *bnx2i_conn, + struct cqe *cqe) +{ + struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; + struct iscsi_task *task; + struct bnx2i_nop_in_msg *nop_in; + struct iscsi_nopin *hdr; + int tgt_async_nop = 0; + + nop_in = (struct bnx2i_nop_in_msg *)cqe; + + spin_lock(&session->back_lock); + hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr; + memset(hdr, 0, sizeof(struct iscsi_hdr)); + hdr->opcode = nop_in->op_code; + hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn); + hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn); + hdr->ttt = cpu_to_be32(nop_in->ttt); + + if (nop_in->itt == (u16) RESERVED_ITT) { + bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); + hdr->itt = RESERVED_ITT; + tgt_async_nop = 1; + goto done; + } + + /* this is a response to one of our nop-outs */ + task = iscsi_itt_to_task(conn, + (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX)); + if (task) { + hdr->flags = ISCSI_FLAG_CMD_FINAL; + hdr->itt = task->hdr->itt; + hdr->ttt = cpu_to_be32(nop_in->ttt); + memcpy(&hdr->lun, nop_in->lun, 8); + } +done: + __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0); + spin_unlock(&session->back_lock); + + return tgt_async_nop; +} + + +/** + * bnx2i_process_async_mesg - this function handles iscsi async message + * @session: iscsi session pointer + * @bnx2i_conn: iscsi connection pointer + * @cqe: pointer to newly DMA'ed CQE entry for processing + * + * process iSCSI ASYNC Message + */ +static void bnx2i_process_async_mesg(struct iscsi_session *session, + struct bnx2i_conn *bnx2i_conn, + struct cqe *cqe) +{ + struct bnx2i_async_msg *async_cqe; + struct iscsi_async *resp_hdr; + u8 async_event; + + bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); + + async_cqe = (struct bnx2i_async_msg *)cqe; + async_event = async_cqe->async_event; + + if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) { + iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, + "async: scsi events not supported\n"); + return; + } + + spin_lock(&session->back_lock); + resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr; + memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); + resp_hdr->opcode = async_cqe->op_code; + resp_hdr->flags = 0x80; + + memcpy(&resp_hdr->lun, async_cqe->lun, 8); + resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn); + resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn); + + resp_hdr->async_event = async_cqe->async_event; + resp_hdr->async_vcode = async_cqe->async_vcode; + + resp_hdr->param1 = cpu_to_be16(async_cqe->param1); + resp_hdr->param2 = cpu_to_be16(async_cqe->param2); + resp_hdr->param3 = cpu_to_be16(async_cqe->param3); + + __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data, + (struct iscsi_hdr *)resp_hdr, NULL, 0); + spin_unlock(&session->back_lock); +} + + +/** + * bnx2i_process_reject_mesg - process iscsi reject pdu + * @session: iscsi session pointer + * @bnx2i_conn: iscsi connection pointer + * @cqe: pointer to newly DMA'ed CQE entry for processing + * + * process iSCSI REJECT message + */ +static void bnx2i_process_reject_mesg(struct iscsi_session *session, + struct bnx2i_conn *bnx2i_conn, + struct cqe *cqe) +{ + struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; + struct bnx2i_reject_msg *reject; + struct iscsi_reject *hdr; + + reject = (struct bnx2i_reject_msg *) cqe; + if (reject->data_length) { + bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length); + bnx2i_put_rq_buf(bnx2i_conn, 1); + } else + bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); + + spin_lock(&session->back_lock); + hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr; + memset(hdr, 0, sizeof(struct iscsi_hdr)); + hdr->opcode = reject->op_code; + hdr->reason = reject->reason; + hton24(hdr->dlength, reject->data_length); + hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn); + hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn); + hdr->ffffffff = cpu_to_be32(RESERVED_ITT); + __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data, + reject->data_length); + spin_unlock(&session->back_lock); +} + +/** + * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion + * @session: iscsi session pointer + * @bnx2i_conn: iscsi connection pointer + * @cqe: pointer to newly DMA'ed CQE entry for processing + * + * process command cleanup response CQE during conn shutdown or error recovery + */ +static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session, + struct bnx2i_conn *bnx2i_conn, + struct cqe *cqe) +{ + struct bnx2i_cleanup_response *cmd_clean_rsp; + struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; + struct iscsi_task *task; + + cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe; + spin_lock(&session->back_lock); + task = iscsi_itt_to_task(conn, + cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); + if (!task) + printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n", + cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX); + spin_unlock(&session->back_lock); + complete(&bnx2i_conn->cmd_cleanup_cmpl); +} + + +/** + * bnx2i_percpu_io_thread - thread per cpu for ios + * + * @arg: ptr to bnx2i_percpu_info structure + */ +int bnx2i_percpu_io_thread(void *arg) +{ + struct bnx2i_percpu_s *p = arg; + struct bnx2i_work *work, *tmp; + LIST_HEAD(work_list); + + set_user_nice(current, MIN_NICE); + + while (!kthread_should_stop()) { + spin_lock_bh(&p->p_work_lock); + while (!list_empty(&p->work_list)) { + list_splice_init(&p->work_list, &work_list); + spin_unlock_bh(&p->p_work_lock); + + list_for_each_entry_safe(work, tmp, &work_list, list) { + list_del_init(&work->list); + /* work allocated in the bh, freed here */ + bnx2i_process_scsi_cmd_resp(work->session, + work->bnx2i_conn, + &work->cqe); + atomic_dec(&work->bnx2i_conn->work_cnt); + kfree(work); + } + spin_lock_bh(&p->p_work_lock); + } + set_current_state(TASK_INTERRUPTIBLE); + spin_unlock_bh(&p->p_work_lock); + schedule(); + } + __set_current_state(TASK_RUNNING); + + return 0; +} + + +/** + * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread + * @session: iscsi session + * @bnx2i_conn: bnx2i connection + * @cqe: pointer to newly DMA'ed CQE entry for processing + * + * this function is called by generic KCQ handler to queue all pending cmd + * completion CQEs + * + * The implementation is to queue the cmd response based on the + * last recorded command for the given connection. The + * cpu_id gets recorded upon task_xmit. No out-of-order completion! + */ +static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session, + struct bnx2i_conn *bnx2i_conn, + struct bnx2i_nop_in_msg *cqe) +{ + struct bnx2i_work *bnx2i_work = NULL; + struct bnx2i_percpu_s *p = NULL; + struct iscsi_task *task; + struct scsi_cmnd *sc; + int rc = 0; + + spin_lock(&session->back_lock); + task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data, + cqe->itt & ISCSI_CMD_RESPONSE_INDEX); + if (!task || !task->sc) { + spin_unlock(&session->back_lock); + return -EINVAL; + } + sc = task->sc; + + spin_unlock(&session->back_lock); + + p = &per_cpu(bnx2i_percpu, blk_mq_rq_cpu(scsi_cmd_to_rq(sc))); + spin_lock(&p->p_work_lock); + if (unlikely(!p->iothread)) { + rc = -EINVAL; + goto err; + } + /* Alloc and copy to the cqe */ + bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC); + if (bnx2i_work) { + INIT_LIST_HEAD(&bnx2i_work->list); + bnx2i_work->session = session; + bnx2i_work->bnx2i_conn = bnx2i_conn; + memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe)); + list_add_tail(&bnx2i_work->list, &p->work_list); + atomic_inc(&bnx2i_conn->work_cnt); + wake_up_process(p->iothread); + spin_unlock(&p->p_work_lock); + goto done; + } else + rc = -ENOMEM; +err: + spin_unlock(&p->p_work_lock); + bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe); +done: + return rc; +} + + +/** + * bnx2i_process_new_cqes - process newly DMA'ed CQE's + * @bnx2i_conn: bnx2i connection + * + * this function is called by generic KCQ handler to process all pending CQE's + */ +static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn) +{ + struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data; + struct iscsi_session *session = conn->session; + struct bnx2i_hba *hba = bnx2i_conn->hba; + struct qp_info *qp; + struct bnx2i_nop_in_msg *nopin; + int tgt_async_msg; + int cqe_cnt = 0; + + if (bnx2i_conn->ep == NULL) + return 0; + + qp = &bnx2i_conn->ep->qp; + + if (!qp->cq_virt) { + printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!", + hba->netdev->name); + goto out; + } + while (1) { + nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe; + if (nopin->cq_req_sn != qp->cqe_exp_seq_sn) + break; + + if (unlikely(test_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags))) { + if (nopin->op_code == ISCSI_OP_NOOP_IN && + nopin->itt == (u16) RESERVED_ITT) { + printk(KERN_ALERT "bnx2i: Unsolicited " + "NOP-In detected for suspended " + "connection dev=%s!\n", + hba->netdev->name); + bnx2i_unsol_pdu_adjust_rq(bnx2i_conn); + goto cqe_out; + } + break; + } + tgt_async_msg = 0; + + switch (nopin->op_code) { + case ISCSI_OP_SCSI_CMD_RSP: + case ISCSI_OP_SCSI_DATA_IN: + /* Run the kthread engine only for data cmds + All other cmds will be completed in this bh! */ + bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin); + goto done; + case ISCSI_OP_LOGIN_RSP: + bnx2i_process_login_resp(session, bnx2i_conn, + qp->cq_cons_qe); + break; + case ISCSI_OP_SCSI_TMFUNC_RSP: + bnx2i_process_tmf_resp(session, bnx2i_conn, + qp->cq_cons_qe); + break; + case ISCSI_OP_TEXT_RSP: + bnx2i_process_text_resp(session, bnx2i_conn, + qp->cq_cons_qe); + break; + case ISCSI_OP_LOGOUT_RSP: + bnx2i_process_logout_resp(session, bnx2i_conn, + qp->cq_cons_qe); + break; + case ISCSI_OP_NOOP_IN: + if (bnx2i_process_nopin_mesg(session, bnx2i_conn, + qp->cq_cons_qe)) + tgt_async_msg = 1; + break; + case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION: + bnx2i_process_nopin_local_cmpl(session, bnx2i_conn, + qp->cq_cons_qe); + break; + case ISCSI_OP_ASYNC_EVENT: + bnx2i_process_async_mesg(session, bnx2i_conn, + qp->cq_cons_qe); + tgt_async_msg = 1; + break; + case ISCSI_OP_REJECT: + bnx2i_process_reject_mesg(session, bnx2i_conn, + qp->cq_cons_qe); + break; + case ISCSI_OPCODE_CLEANUP_RESPONSE: + bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn, + qp->cq_cons_qe); + break; + default: + printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", + nopin->op_code); + } + + ADD_STATS_64(hba, rx_pdus, 1); + ADD_STATS_64(hba, rx_bytes, nopin->data_length); +done: + if (!tgt_async_msg) { + if (!atomic_read(&bnx2i_conn->ep->num_active_cmds)) + printk(KERN_ALERT "bnx2i (%s): no active cmd! " + "op 0x%x\n", + hba->netdev->name, + nopin->op_code); + else + atomic_dec(&bnx2i_conn->ep->num_active_cmds); + } +cqe_out: + /* clear out in production version only, till beta keep opcode + * field intact, will be helpful in debugging (context dump) + * nopin->op_code = 0; + */ + cqe_cnt++; + qp->cqe_exp_seq_sn++; + if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1)) + qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN; + + if (qp->cq_cons_qe == qp->cq_last_qe) { + qp->cq_cons_qe = qp->cq_first_qe; + qp->cq_cons_idx = 0; + } else { + qp->cq_cons_qe++; + qp->cq_cons_idx++; + } + } +out: + return cqe_cnt; +} + +/** + * bnx2i_fastpath_notification - process global event queue (KCQ) + * @hba: adapter structure pointer + * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry + * + * Fast path event notification handler, KCQ entry carries context id + * of the connection that has 1 or more pending CQ entries + */ +static void bnx2i_fastpath_notification(struct bnx2i_hba *hba, + struct iscsi_kcqe *new_cqe_kcqe) +{ + struct bnx2i_conn *bnx2i_conn; + u32 iscsi_cid; + int nxt_idx; + + iscsi_cid = new_cqe_kcqe->iscsi_conn_id; + bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); + + if (!bnx2i_conn) { + printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid); + return; + } + if (!bnx2i_conn->ep) { + printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid); + return; + } + + bnx2i_process_new_cqes(bnx2i_conn); + nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, + CNIC_ARM_CQE_FP); + if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn)) + bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP); +} + + +/** + * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE + * @hba: adapter structure pointer + * @update_kcqe: kcqe pointer + * + * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration + */ +static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba, + struct iscsi_kcqe *update_kcqe) +{ + struct bnx2i_conn *conn; + u32 iscsi_cid; + + iscsi_cid = update_kcqe->iscsi_conn_id; + conn = bnx2i_get_conn_from_id(hba, iscsi_cid); + + if (!conn) { + printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid); + return; + } + if (!conn->ep) { + printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid); + return; + } + + if (update_kcqe->completion_status) { + printk(KERN_ALERT "request failed cid %x\n", iscsi_cid); + conn->ep->state = EP_STATE_ULP_UPDATE_FAILED; + } else + conn->ep->state = EP_STATE_ULP_UPDATE_COMPL; + + wake_up_interruptible(&conn->ep->ofld_wait); +} + + +/** + * bnx2i_recovery_que_add_conn - add connection to recovery queue + * @hba: adapter structure pointer + * @bnx2i_conn: iscsi connection + * + * Add connection to recovery queue and schedule adapter eh worker + */ +static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba, + struct bnx2i_conn *bnx2i_conn) +{ + iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data, + ISCSI_ERR_CONN_FAILED); +} + + +/** + * bnx2i_process_tcp_error - process error notification on a given connection + * + * @hba: adapter structure pointer + * @tcp_err: tcp error kcqe pointer + * + * handles tcp level error notifications from FW. + */ +static void bnx2i_process_tcp_error(struct bnx2i_hba *hba, + struct iscsi_kcqe *tcp_err) +{ + struct bnx2i_conn *bnx2i_conn; + u32 iscsi_cid; + + iscsi_cid = tcp_err->iscsi_conn_id; + bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); + + if (!bnx2i_conn) { + printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); + return; + } + + printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n", + iscsi_cid, tcp_err->completion_status); + bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); +} + + +/** + * bnx2i_process_iscsi_error - process error notification on a given connection + * @hba: adapter structure pointer + * @iscsi_err: iscsi error kcqe pointer + * + * handles iscsi error notifications from the FW. Firmware based in initial + * handshake classifies iscsi protocol / TCP rfc violation into either + * warning or error indications. If indication is of "Error" type, driver + * will initiate session recovery for that connection/session. For + * "Warning" type indication, driver will put out a system log message + * (there will be only one message for each type for the life of the + * session, this is to avoid un-necessarily overloading the system) + */ +static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba, + struct iscsi_kcqe *iscsi_err) +{ + struct bnx2i_conn *bnx2i_conn; + u32 iscsi_cid; + const char *additional_notice = ""; + const char *message; + int need_recovery; + u64 err_mask64; + + iscsi_cid = iscsi_err->iscsi_conn_id; + bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid); + if (!bnx2i_conn) { + printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid); + return; + } + + err_mask64 = (0x1ULL << iscsi_err->completion_status); + + if (err_mask64 & iscsi_error_mask) { + need_recovery = 0; + message = "iscsi_warning"; + } else { + need_recovery = 1; + message = "iscsi_error"; + } + + switch (iscsi_err->completion_status) { + case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR: + additional_notice = "hdr digest err"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR: + additional_notice = "data digest err"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE: + additional_notice = "wrong opcode rcvd"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN: + additional_notice = "AHS len > 0 rcvd"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT: + additional_notice = "invalid ITT rcvd"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN: + additional_notice = "wrong StatSN rcvd"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN: + additional_notice = "wrong DataSN rcvd"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T: + additional_notice = "pend R2T violation"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0: + additional_notice = "ERL0, UO"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1: + additional_notice = "ERL0, U1"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2: + additional_notice = "ERL0, U2"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3: + additional_notice = "ERL0, U3"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4: + additional_notice = "ERL0, U4"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5: + additional_notice = "ERL0, U5"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6: + additional_notice = "ERL0, U6"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN: + additional_notice = "invalid resi len"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN: + additional_notice = "MRDSL violation"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO: + additional_notice = "F-bit not set"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV: + additional_notice = "invalid TTT"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN: + additional_notice = "invalid DataSN"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN: + additional_notice = "burst len violation"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF: + additional_notice = "buf offset violation"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN: + additional_notice = "invalid LUN field"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN: + additional_notice = "invalid R2TSN field"; + break; +#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \ + ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0 + case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0: + additional_notice = "invalid cmd len1"; + break; +#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \ + ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1 + case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1: + additional_notice = "invalid cmd len2"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED: + additional_notice = "pend r2t exceeds MaxOutstandingR2T value"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV: + additional_notice = "TTT is rsvd"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN: + additional_notice = "MBL violation"; + break; +#define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \ + ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO + case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO: + additional_notice = "data seg len != 0"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN: + additional_notice = "reject pdu len error"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN: + additional_notice = "async pdu len error"; + break; + case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN: + additional_notice = "nopin pdu len error"; + break; +#define BNX2_ERR_PEND_R2T_IN_CLEANUP \ + ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP + case BNX2_ERR_PEND_R2T_IN_CLEANUP: + additional_notice = "pend r2t in cleanup"; + break; + + case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT: + additional_notice = "IP fragments rcvd"; + break; + case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS: + additional_notice = "IP options error"; + break; + case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG: + additional_notice = "urgent flag error"; + break; + default: + printk(KERN_ALERT "iscsi_err - unknown err %x\n", + iscsi_err->completion_status); + } + + if (need_recovery) { + iscsi_conn_printk(KERN_ALERT, + bnx2i_conn->cls_conn->dd_data, + "bnx2i: %s - %s\n", + message, additional_notice); + + iscsi_conn_printk(KERN_ALERT, + bnx2i_conn->cls_conn->dd_data, + "conn_err - hostno %d conn %p, " + "iscsi_cid %x cid %x\n", + bnx2i_conn->hba->shost->host_no, + bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid, + bnx2i_conn->ep->ep_cid); + bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn); + } else + if (!test_and_set_bit(iscsi_err->completion_status, + (void *) &bnx2i_conn->violation_notified)) + iscsi_conn_printk(KERN_ALERT, + bnx2i_conn->cls_conn->dd_data, + "bnx2i: %s - %s\n", + message, additional_notice); +} + + +/** + * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion + * @hba: adapter structure pointer + * @conn_destroy: conn destroy kcqe pointer + * + * handles connection destroy completion request. + */ +static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba, + struct iscsi_kcqe *conn_destroy) +{ + struct bnx2i_endpoint *ep; + + ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id); + if (!ep) { + printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending " + "offload request, unexpected completion\n"); + return; + } + + if (hba != ep->hba) { + printk(KERN_ALERT "conn destroy- error hba mismatch\n"); + return; + } + + if (conn_destroy->completion_status) { + printk(KERN_ALERT "conn_destroy_cmpl: op failed\n"); + ep->state = EP_STATE_CLEANUP_FAILED; + } else + ep->state = EP_STATE_CLEANUP_CMPL; + wake_up_interruptible(&ep->ofld_wait); +} + + +/** + * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion + * @hba: adapter structure pointer + * @ofld_kcqe: conn offload kcqe pointer + * + * handles initial connection offload completion, ep_connect() thread is + * woken-up to continue with LLP connect process + */ +static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba, + struct iscsi_kcqe *ofld_kcqe) +{ + u32 cid_addr; + struct bnx2i_endpoint *ep; + + ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id); + if (!ep) { + printk(KERN_ALERT "ofld_cmpl: no pend offload request\n"); + return; + } + + if (hba != ep->hba) { + printk(KERN_ALERT "ofld_cmpl: error hba mismatch\n"); + return; + } + + if (ofld_kcqe->completion_status) { + ep->state = EP_STATE_OFLD_FAILED; + if (ofld_kcqe->completion_status == + ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE) + printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable " + "to allocate iSCSI context resources\n", + hba->netdev->name); + else if (ofld_kcqe->completion_status == + ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE) + printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " + "opcode\n", hba->netdev->name); + else if (ofld_kcqe->completion_status == + ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY) + /* error status code valid only for 5771x chipset */ + ep->state = EP_STATE_OFLD_FAILED_CID_BUSY; + else + printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid " + "error code %d\n", hba->netdev->name, + ofld_kcqe->completion_status); + } else { + ep->state = EP_STATE_OFLD_COMPL; + cid_addr = ofld_kcqe->iscsi_conn_context_id; + ep->ep_cid = cid_addr; + ep->qp.ctx_base = NULL; + } + wake_up_interruptible(&ep->ofld_wait); +} + +/** + * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE + * @context: adapter structure pointer + * @kcqe: kcqe pointer + * @num_cqe: number of kcqes to process + * + * Generic KCQ event handler/dispatcher + */ +static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[], + u32 num_cqe) +{ + struct bnx2i_hba *hba = context; + int i = 0; + struct iscsi_kcqe *ikcqe = NULL; + + while (i < num_cqe) { + ikcqe = (struct iscsi_kcqe *) kcqe[i++]; + + if (ikcqe->op_code == + ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION) + bnx2i_fastpath_notification(hba, ikcqe); + else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN) + bnx2i_process_ofld_cmpl(hba, ikcqe); + else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN) + bnx2i_process_update_conn_cmpl(hba, ikcqe); + else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) { + if (ikcqe->completion_status != + ISCSI_KCQE_COMPLETION_STATUS_SUCCESS) + bnx2i_iscsi_license_error(hba, ikcqe->\ + completion_status); + else { + set_bit(ADAPTER_STATE_UP, &hba->adapter_state); + bnx2i_get_link_state(hba); + printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: " + "ISCSI_INIT passed\n", + (u8)hba->pcidev->bus->number, + hba->pci_devno, + (u8)hba->pci_func); + + + } + } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN) + bnx2i_process_conn_destroy_cmpl(hba, ikcqe); + else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR) + bnx2i_process_iscsi_error(hba, ikcqe); + else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR) + bnx2i_process_tcp_error(hba, ikcqe); + else + printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n", + ikcqe->op_code); + } +} + + +/** + * bnx2i_indicate_netevent - Generic netdev event handler + * @context: adapter structure pointer + * @event: event type + * @vlan_id: vlans id - associated vlan id with this event + * + * Handles four netdev events, NETDEV_UP, NETDEV_DOWN, + * NETDEV_GOING_DOWN and NETDEV_CHANGE + */ +static void bnx2i_indicate_netevent(void *context, unsigned long event, + u16 vlan_id) +{ + struct bnx2i_hba *hba = context; + + /* Ignore all netevent coming from vlans */ + if (vlan_id != 0) + return; + + switch (event) { + case NETDEV_UP: + if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state)) + bnx2i_send_fw_iscsi_init_msg(hba); + break; + case NETDEV_DOWN: + clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); + clear_bit(ADAPTER_STATE_UP, &hba->adapter_state); + break; + case NETDEV_GOING_DOWN: + set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); + iscsi_host_for_each_session(hba->shost, + bnx2i_drop_session); + break; + case NETDEV_CHANGE: + bnx2i_get_link_state(hba); + break; + default: + ; + } +} + + +/** + * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion + * @cm_sk: cnic sock structure pointer + * + * function callback exported via bnx2i - cnic driver interface to + * indicate completion of option-2 TCP connect request. + */ +static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk) +{ + struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; + + if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state)) + ep->state = EP_STATE_CONNECT_FAILED; + else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags)) + ep->state = EP_STATE_CONNECT_COMPL; + else + ep->state = EP_STATE_CONNECT_FAILED; + + wake_up_interruptible(&ep->ofld_wait); +} + + +/** + * bnx2i_cm_close_cmpl - process tcp conn close completion + * @cm_sk: cnic sock structure pointer + * + * function callback exported via bnx2i - cnic driver interface to + * indicate completion of option-2 graceful TCP connect shutdown + */ +static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk) +{ + struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; + + ep->state = EP_STATE_DISCONN_COMPL; + wake_up_interruptible(&ep->ofld_wait); +} + + +/** + * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion + * @cm_sk: cnic sock structure pointer + * + * function callback exported via bnx2i - cnic driver interface to + * indicate completion of option-2 abortive TCP connect termination + */ +static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk) +{ + struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; + + ep->state = EP_STATE_DISCONN_COMPL; + wake_up_interruptible(&ep->ofld_wait); +} + + +/** + * bnx2i_cm_remote_close - process received TCP FIN + * @cm_sk: cnic sock structure pointer + * + * function callback exported via bnx2i - cnic driver interface to indicate + * async TCP events such as FIN + */ +static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk) +{ + struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; + + ep->state = EP_STATE_TCP_FIN_RCVD; + if (ep->conn) + bnx2i_recovery_que_add_conn(ep->hba, ep->conn); +} + +/** + * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup + * @cm_sk: cnic sock structure pointer + * + * function callback exported via bnx2i - cnic driver interface to + * indicate async TCP events (RST) sent by the peer. + */ +static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk) +{ + struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context; + u32 old_state = ep->state; + + ep->state = EP_STATE_TCP_RST_RCVD; + if (old_state == EP_STATE_DISCONN_START) + wake_up_interruptible(&ep->ofld_wait); + else + if (ep->conn) + bnx2i_recovery_que_add_conn(ep->hba, ep->conn); +} + + +static int bnx2i_send_nl_mesg(void *context, u32 msg_type, + char *buf, u16 buflen) +{ + struct bnx2i_hba *hba = context; + int rc; + + if (!hba) + return -ENODEV; + + rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport, + msg_type, buf, buflen); + if (rc) + printk(KERN_ALERT "bnx2i: private nl message send error\n"); + + return rc; +} + + +/* + * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure + * carrying callback function pointers + */ +struct cnic_ulp_ops bnx2i_cnic_cb = { + .cnic_init = bnx2i_ulp_init, + .cnic_exit = bnx2i_ulp_exit, + .cnic_start = bnx2i_start, + .cnic_stop = bnx2i_stop, + .indicate_kcqes = bnx2i_indicate_kcqe, + .indicate_netevent = bnx2i_indicate_netevent, + .cm_connect_complete = bnx2i_cm_connect_cmpl, + .cm_close_complete = bnx2i_cm_close_cmpl, + .cm_abort_complete = bnx2i_cm_abort_cmpl, + .cm_remote_close = bnx2i_cm_remote_close, + .cm_remote_abort = bnx2i_cm_remote_abort, + .iscsi_nl_send_msg = bnx2i_send_nl_mesg, + .cnic_get_stats = bnx2i_get_stats, + .owner = THIS_MODULE +}; + + +/** + * bnx2i_map_ep_dbell_regs - map connection doorbell registers + * @ep: bnx2i endpoint + * + * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these + * register in BAR #0. Whereas in 57710 these register are accessed by + * mapping BAR #1 + */ +int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep) +{ + u32 cid_num; + u32 reg_off; + u32 first_l4l5; + u32 ctx_sz; + u32 config2; + resource_size_t reg_base; + + cid_num = bnx2i_get_cid_num(ep); + + if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) { + reg_base = pci_resource_start(ep->hba->pcidev, + BNX2X_DOORBELL_PCI_BAR); + reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF); + ep->qp.ctx_base = ioremap(reg_base + reg_off, 4); + if (!ep->qp.ctx_base) + return -ENOMEM; + goto arm_cq; + } + + if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) && + (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) { + config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2); + first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5; + ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3; + if (ctx_sz) + reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE + + BNX2I_570X_PAGE_SIZE_DEFAULT * + (((cid_num - first_l4l5) / ctx_sz) + 256); + else + reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num); + } else + /* 5709 device in normal node and 5706/5708 devices */ + reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num); + + ep->qp.ctx_base = ioremap(ep->hba->reg_base + reg_off, + MB_KERNEL_CTX_SIZE); + if (!ep->qp.ctx_base) + return -ENOMEM; + +arm_cq: + bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE); + return 0; +} |