File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/drivers/scsi/bnx2i/bnx2i_hwi.c b/drivers/scsi/bnx2i/bnx2i_hwi.c
new file mode 100644
index 0000000..fb072cc
--- /dev/null
+++ b/drivers/scsi/bnx2i/bnx2i_hwi.c
@@ -0,0 +1,2771 @@
+/* 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
+ * @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
+ * @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);
+ }
+ mmiowb();
+}
+
+
+/**
+ * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
+ * @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);
+
+ mmiowb(); /* flush posted PCI writes */
+}
+
+
+/**
+ * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
+ * @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
+ * @conn: iscsi connection
+ * @cmd: 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_login(struct bnx2i_conn *bnx2i_conn,
+ struct iscsi_task *task)
+{
+ struct bnx2i_cmd *bnx2i_cmd;
+ struct bnx2i_login_request *login_wqe;
+ struct iscsi_login_req *login_hdr;
+ u32 dword;
+
+ bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
+ 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
+ * @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_cmd *bnx2i_cmd;
+ struct bnx2i_tmf_request *tmfabort_wqe;
+ u32 dword;
+ u32 scsi_lun[2];
+
+ bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
+ 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
+ * @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_cmd *bnx2i_cmd;
+ struct bnx2i_text_request *text_wqe;
+ struct iscsi_text *text_hdr;
+ u32 dword;
+
+ bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
+ 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
+ * @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
+ * @conn: iscsi connection
+ * @cmd: driver command structure 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_cmd *bnx2i_cmd;
+ struct bnx2i_nop_out_request *nopout_wqe;
+ struct iscsi_nopout *nopout_hdr;
+
+ bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
+ 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);
+
+ if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
+ u32 tmp = nopout_wqe->lun[0];
+ /* 57710 requires LUN field to be swapped */
+ nopout_wqe->lun[0] = nopout_wqe->lun[1];
+ nopout_wqe->lun[1] = tmp;
+ }
+
+ 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
+ * @conn: iscsi connection
+ * @cmd: driver command structure 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_cmd *bnx2i_cmd;
+ struct bnx2i_logout_request *logout_wqe;
+ struct iscsi_logout *logout_hdr;
+
+ bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
+ 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
+ * @data: endpoint (transport handle) structure pointer
+ *
+ * routine to handle connection offload/destroy request timeout
+ */
+void bnx2i_ep_ofld_timer(unsigned long data)
+{
+ struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;
+
+ 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;
+ }
+
+ memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
+ 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;
+ }
+ memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
+
+ 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
+ * @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
+ * @bnx2i_conn: bnx2i connection
+ *
+ * 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;
+ int cpu;
+
+ 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;
+
+ if (!blk_rq_cpu_valid(sc->request))
+ cpu = smp_processor_id();
+ else
+ cpu = sc->request->cpu;
+
+ spin_unlock(&session->back_lock);
+
+ p = &per_cpu(bnx2i_percpu, cpu);
+ 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_SUSPEND_BIT, &conn->suspend_rx))) {
+ 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;
+ char warn_notice[] = "iscsi_warning";
+ char error_notice[] = "iscsi_error";
+ char additional_notice[64];
+ 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 = warn_notice;
+ } else {
+ need_recovery = 1;
+ message = error_notice;
+ }
+
+ switch (iscsi_err->completion_status) {
+ case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
+ strcpy(additional_notice, "hdr digest err");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
+ strcpy(additional_notice, "data digest err");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
+ strcpy(additional_notice, "wrong opcode rcvd");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
+ strcpy(additional_notice, "AHS len > 0 rcvd");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
+ strcpy(additional_notice, "invalid ITT rcvd");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
+ strcpy(additional_notice, "wrong StatSN rcvd");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
+ strcpy(additional_notice, "wrong DataSN rcvd");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
+ strcpy(additional_notice, "pend R2T violation");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
+ strcpy(additional_notice, "ERL0, UO");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
+ strcpy(additional_notice, "ERL0, U1");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
+ strcpy(additional_notice, "ERL0, U2");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
+ strcpy(additional_notice, "ERL0, U3");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
+ strcpy(additional_notice, "ERL0, U4");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
+ strcpy(additional_notice, "ERL0, U5");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
+ strcpy(additional_notice, "ERL0, U6");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
+ strcpy(additional_notice, "invalid resi len");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
+ strcpy(additional_notice, "MRDSL violation");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
+ strcpy(additional_notice, "F-bit not set");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
+ strcpy(additional_notice, "invalid TTT");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
+ strcpy(additional_notice, "invalid DataSN");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
+ strcpy(additional_notice, "burst len violation");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
+ strcpy(additional_notice, "buf offset violation");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
+ strcpy(additional_notice, "invalid LUN field");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
+ strcpy(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:
+ strcpy(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:
+ strcpy(additional_notice, "invalid cmd len2");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
+ strcpy(additional_notice,
+ "pend r2t exceeds MaxOutstandingR2T value");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
+ strcpy(additional_notice, "TTT is rsvd");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
+ strcpy(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:
+ strcpy(additional_notice, "data seg len != 0");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
+ strcpy(additional_notice, "reject pdu len error");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
+ strcpy(additional_notice, "async pdu len error");
+ break;
+ case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
+ strcpy(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:
+ strcpy(additional_notice, "pend r2t in cleanup");
+ break;
+
+ case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
+ strcpy(additional_notice, "IP fragments rcvd");
+ break;
+ case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
+ strcpy(additional_notice, "IP options error");
+ break;
+ case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
+ strcpy(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 complection\n");
+ return;
+ }
+
+ if (hba != ep->hba) {
+ printk(KERN_ALERT "conn destroy- error hba mis-match\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;
+ u32 cid_num;
+
+ 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 mis-match\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;
+ cid_num = bnx2i_get_cid_num(ep);
+ 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
+ * @hba: adapter structure pointer
+ * @update_kcqe: kcqe pointer
+ *
+ * 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
+ * @hba: adapter structure pointer
+ * @update_kcqe: kcqe 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
+ * @hba: adapter structure pointer
+ * @update_kcqe: kcqe 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_nocache(reg_base + reg_off, 4);
+ 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_nocache(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;
+}