linux/drivers/scsi/bnx2i/bnx2i_hwi.c
<<
>>
Prefs
   1/* bnx2i_hwi.c: Broadcom NetXtreme II iSCSI driver.
   2 *
   3 * Copyright (c) 2006 - 2011 Broadcom Corporation
   4 * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
   5 * Copyright (c) 2007, 2008 Mike Christie
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation.
  10 *
  11 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
  12 * Maintained by: Eddie Wai (eddie.wai@broadcom.com)
  13 */
  14
  15#include <linux/gfp.h>
  16#include <scsi/scsi_tcq.h>
  17#include <scsi/libiscsi.h>
  18#include "bnx2i.h"
  19
  20DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
  21
  22/**
  23 * bnx2i_get_cid_num - get cid from ep
  24 * @ep:         endpoint pointer
  25 *
  26 * Only applicable to 57710 family of devices
  27 */
  28static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
  29{
  30        u32 cid;
  31
  32        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
  33                cid = ep->ep_cid;
  34        else
  35                cid = GET_CID_NUM(ep->ep_cid);
  36        return cid;
  37}
  38
  39
  40/**
  41 * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
  42 * @hba:                Adapter for which adjustments is to be made
  43 *
  44 * Only applicable to 57710 family of devices
  45 */
  46static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
  47{
  48        u32 num_elements_per_pg;
  49
  50        if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
  51            test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
  52            test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
  53                if (!is_power_of_2(hba->max_sqes))
  54                        hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);
  55
  56                if (!is_power_of_2(hba->max_rqes))
  57                        hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
  58        }
  59
  60        /* Adjust each queue size if the user selection does not
  61         * yield integral num of page buffers
  62         */
  63        /* adjust SQ */
  64        num_elements_per_pg = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
  65        if (hba->max_sqes < num_elements_per_pg)
  66                hba->max_sqes = num_elements_per_pg;
  67        else if (hba->max_sqes % num_elements_per_pg)
  68                hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
  69                                 ~(num_elements_per_pg - 1);
  70
  71        /* adjust CQ */
  72        num_elements_per_pg = PAGE_SIZE / BNX2I_CQE_SIZE;
  73        if (hba->max_cqes < num_elements_per_pg)
  74                hba->max_cqes = num_elements_per_pg;
  75        else if (hba->max_cqes % num_elements_per_pg)
  76                hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
  77                                 ~(num_elements_per_pg - 1);
  78
  79        /* adjust RQ */
  80        num_elements_per_pg = PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
  81        if (hba->max_rqes < num_elements_per_pg)
  82                hba->max_rqes = num_elements_per_pg;
  83        else if (hba->max_rqes % num_elements_per_pg)
  84                hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
  85                                 ~(num_elements_per_pg - 1);
  86}
  87
  88
  89/**
  90 * bnx2i_get_link_state - get network interface link state
  91 * @hba:        adapter instance pointer
  92 *
  93 * updates adapter structure flag based on netdev state
  94 */
  95static void bnx2i_get_link_state(struct bnx2i_hba *hba)
  96{
  97        if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
  98                set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
  99        else
 100                clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
 101}
 102
 103
 104/**
 105 * bnx2i_iscsi_license_error - displays iscsi license related error message
 106 * @hba:                adapter instance pointer
 107 * @error_code:         error classification
 108 *
 109 * Puts out an error log when driver is unable to offload iscsi connection
 110 *      due to license restrictions
 111 */
 112static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
 113{
 114        if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
 115                /* iSCSI offload not supported on this device */
 116                printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
 117                                hba->netdev->name);
 118        if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
 119                /* iSCSI offload not supported on this LOM device */
 120                printk(KERN_ERR "bnx2i: LOM is not enable to "
 121                                "offload iSCSI connections, dev=%s\n",
 122                                hba->netdev->name);
 123        set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
 124}
 125
 126
 127/**
 128 * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
 129 * @ep:         endpoint (transport indentifier) structure
 130 * @action:     action, ARM or DISARM. For now only ARM_CQE is used
 131 *
 132 * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
 133 *      the driver. EQ event is generated CQ index is hit or at least 1 CQ is
 134 *      outstanding and on chip timer expires
 135 */
 136int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
 137{
 138        struct bnx2i_5771x_cq_db *cq_db;
 139        u16 cq_index;
 140        u16 next_index = 0;
 141        u32 num_active_cmds;
 142
 143        /* Coalesce CQ entries only on 10G devices */
 144        if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 145                return 0;
 146
 147        /* Do not update CQ DB multiple times before firmware writes
 148         * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
 149         * interrupts and other unwanted results
 150         */
 151        cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
 152
 153        if (action != CNIC_ARM_CQE_FP)
 154                if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
 155                        return 0;
 156
 157        if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) {
 158                num_active_cmds = atomic_read(&ep->num_active_cmds);
 159                if (num_active_cmds <= event_coal_min)
 160                        next_index = 1;
 161                else {
 162                        next_index = num_active_cmds >> ep->ec_shift;
 163                        if (next_index > num_active_cmds - event_coal_min)
 164                                next_index = num_active_cmds - event_coal_min;
 165                }
 166                if (!next_index)
 167                        next_index = 1;
 168                cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;
 169                if (cq_index > ep->qp.cqe_size * 2)
 170                        cq_index -= ep->qp.cqe_size * 2;
 171                if (!cq_index)
 172                        cq_index = 1;
 173
 174                cq_db->sqn[0] = cq_index;
 175        }
 176        return next_index;
 177}
 178
 179
 180/**
 181 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
 182 * @conn:               iscsi connection on which RQ event occurred
 183 * @ptr:                driver buffer to which RQ buffer contents is to
 184 *                      be copied
 185 * @len:                length of valid data inside RQ buf
 186 *
 187 * Copies RQ buffer contents from shared (DMA'able) memory region to
 188 *      driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
 189 *      scsi sense info
 190 */
 191void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
 192{
 193        if (!bnx2i_conn->ep->qp.rqe_left)
 194                return;
 195
 196        bnx2i_conn->ep->qp.rqe_left--;
 197        memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
 198        if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
 199                bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
 200                bnx2i_conn->ep->qp.rq_cons_idx = 0;
 201        } else {
 202                bnx2i_conn->ep->qp.rq_cons_qe++;
 203                bnx2i_conn->ep->qp.rq_cons_idx++;
 204        }
 205}
 206
 207
 208static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
 209{
 210        struct bnx2i_5771x_dbell dbell;
 211        u32 msg;
 212
 213        memset(&dbell, 0, sizeof(dbell));
 214        dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
 215                              B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
 216        msg = *((u32 *)&dbell);
 217        /* TODO : get doorbell register mapping */
 218        writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
 219}
 220
 221
 222/**
 223 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
 224 * @conn:       iscsi connection on which event to post
 225 * @count:      number of RQ buffer being posted to chip
 226 *
 227 * No need to ring hardware doorbell for 57710 family of devices
 228 */
 229void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
 230{
 231        struct bnx2i_5771x_sq_rq_db *rq_db;
 232        u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
 233        struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 234
 235        ep->qp.rqe_left += count;
 236        ep->qp.rq_prod_idx &= 0x7FFF;
 237        ep->qp.rq_prod_idx += count;
 238
 239        if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
 240                ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
 241                if (!hi_bit)
 242                        ep->qp.rq_prod_idx |= 0x8000;
 243        } else
 244                ep->qp.rq_prod_idx |= hi_bit;
 245
 246        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 247                rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
 248                rq_db->prod_idx = ep->qp.rq_prod_idx;
 249                /* no need to ring hardware doorbell for 57710 */
 250        } else {
 251                writew(ep->qp.rq_prod_idx,
 252                       ep->qp.ctx_base + CNIC_RECV_DOORBELL);
 253        }
 254        mmiowb();
 255}
 256
 257
 258/**
 259 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
 260 * @conn:               iscsi connection to which new SQ entries belong
 261 * @count:              number of SQ WQEs to post
 262 *
 263 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
 264 *      of devices. For 5706/5708/5709 new SQ WQE count is written into the
 265 *      doorbell register
 266 */
 267static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
 268{
 269        struct bnx2i_5771x_sq_rq_db *sq_db;
 270        struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 271
 272        atomic_inc(&ep->num_active_cmds);
 273        wmb();  /* flush SQ WQE memory before the doorbell is rung */
 274        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 275                sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
 276                sq_db->prod_idx = ep->qp.sq_prod_idx;
 277                bnx2i_ring_577xx_doorbell(bnx2i_conn);
 278        } else
 279                writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
 280
 281        mmiowb(); /* flush posted PCI writes */
 282}
 283
 284
 285/**
 286 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
 287 * @conn:       iscsi connection to which new SQ entries belong
 288 * @count:      number of SQ WQEs to post
 289 *
 290 * this routine will update SQ driver parameters and ring the doorbell
 291 */
 292static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
 293                                              int count)
 294{
 295        int tmp_cnt;
 296
 297        if (count == 1) {
 298                if (bnx2i_conn->ep->qp.sq_prod_qe ==
 299                    bnx2i_conn->ep->qp.sq_last_qe)
 300                        bnx2i_conn->ep->qp.sq_prod_qe =
 301                                                bnx2i_conn->ep->qp.sq_first_qe;
 302                else
 303                        bnx2i_conn->ep->qp.sq_prod_qe++;
 304        } else {
 305                if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
 306                    bnx2i_conn->ep->qp.sq_last_qe)
 307                        bnx2i_conn->ep->qp.sq_prod_qe += count;
 308                else {
 309                        tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
 310                                bnx2i_conn->ep->qp.sq_prod_qe;
 311                        bnx2i_conn->ep->qp.sq_prod_qe =
 312                                &bnx2i_conn->ep->qp.sq_first_qe[count -
 313                                                                (tmp_cnt + 1)];
 314                }
 315        }
 316        bnx2i_conn->ep->qp.sq_prod_idx += count;
 317        /* Ring the doorbell */
 318        bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
 319}
 320
 321
 322/**
 323 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
 324 * @conn:       iscsi connection
 325 * @cmd:        driver command structure which is requesting
 326 *              a WQE to sent to chip for further processing
 327 *
 328 * prepare and post an iSCSI Login request WQE to CNIC firmware
 329 */
 330int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
 331                           struct iscsi_task *task)
 332{
 333        struct bnx2i_cmd *bnx2i_cmd;
 334        struct bnx2i_login_request *login_wqe;
 335        struct iscsi_login_req *login_hdr;
 336        u32 dword;
 337
 338        bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 339        login_hdr = (struct iscsi_login_req *)task->hdr;
 340        login_wqe = (struct bnx2i_login_request *)
 341                                                bnx2i_conn->ep->qp.sq_prod_qe;
 342
 343        login_wqe->op_code = login_hdr->opcode;
 344        login_wqe->op_attr = login_hdr->flags;
 345        login_wqe->version_max = login_hdr->max_version;
 346        login_wqe->version_min = login_hdr->min_version;
 347        login_wqe->data_length = ntoh24(login_hdr->dlength);
 348        login_wqe->isid_lo = *((u32 *) login_hdr->isid);
 349        login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
 350        login_wqe->tsih = login_hdr->tsih;
 351        login_wqe->itt = task->itt |
 352                (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
 353        login_wqe->cid = login_hdr->cid;
 354
 355        login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
 356        login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
 357        login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;
 358
 359        login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
 360        login_wqe->resp_bd_list_addr_hi =
 361                (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
 362
 363        dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
 364                 (bnx2i_conn->gen_pdu.resp_buf_size <<
 365                  ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
 366        login_wqe->resp_buffer = dword;
 367        login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
 368        login_wqe->bd_list_addr_hi =
 369                (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
 370        login_wqe->num_bds = 1;
 371        login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 372
 373        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 374        return 0;
 375}
 376
 377/**
 378 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
 379 * @conn:       iscsi connection
 380 * @mtask:      driver command structure which is requesting
 381 *              a WQE to sent to chip for further processing
 382 *
 383 * prepare and post an iSCSI Login request WQE to CNIC firmware
 384 */
 385int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
 386                         struct iscsi_task *mtask)
 387{
 388        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
 389        struct iscsi_tm *tmfabort_hdr;
 390        struct scsi_cmnd *ref_sc;
 391        struct iscsi_task *ctask;
 392        struct bnx2i_cmd *bnx2i_cmd;
 393        struct bnx2i_tmf_request *tmfabort_wqe;
 394        u32 dword;
 395        u32 scsi_lun[2];
 396
 397        bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
 398        tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
 399        tmfabort_wqe = (struct bnx2i_tmf_request *)
 400                                                bnx2i_conn->ep->qp.sq_prod_qe;
 401
 402        tmfabort_wqe->op_code = tmfabort_hdr->opcode;
 403        tmfabort_wqe->op_attr = tmfabort_hdr->flags;
 404
 405        tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
 406        tmfabort_wqe->reserved2 = 0;
 407        tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
 408
 409        switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
 410        case ISCSI_TM_FUNC_ABORT_TASK:
 411        case ISCSI_TM_FUNC_TASK_REASSIGN:
 412                ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
 413                if (!ctask || !ctask->sc)
 414                        /*
 415                         * the iscsi layer must have completed the cmd while
 416                         * was starting up.
 417                         *
 418                         * Note: In the case of a SCSI cmd timeout, the task's
 419                         *       sc is still active; hence ctask->sc != 0
 420                         *       In this case, the task must be aborted
 421                         */
 422                        return 0;
 423
 424                ref_sc = ctask->sc;
 425                if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
 426                        dword = (ISCSI_TASK_TYPE_WRITE <<
 427                                 ISCSI_CMD_REQUEST_TYPE_SHIFT);
 428                else
 429                        dword = (ISCSI_TASK_TYPE_READ <<
 430                                 ISCSI_CMD_REQUEST_TYPE_SHIFT);
 431                tmfabort_wqe->ref_itt = (dword |
 432                                        (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
 433                break;
 434        default:
 435                tmfabort_wqe->ref_itt = RESERVED_ITT;
 436        }
 437        memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun));
 438        tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
 439        tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
 440
 441        tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
 442
 443        tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
 444        tmfabort_wqe->bd_list_addr_hi = (u32)
 445                                ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 446        tmfabort_wqe->num_bds = 1;
 447        tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 448
 449        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 450        return 0;
 451}
 452
 453/**
 454 * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware
 455 * @conn:       iscsi connection
 456 * @mtask:      driver command structure which is requesting
 457 *              a WQE to sent to chip for further processing
 458 *
 459 * prepare and post an iSCSI Text request WQE to CNIC firmware
 460 */
 461int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn,
 462                          struct iscsi_task *mtask)
 463{
 464        struct bnx2i_cmd *bnx2i_cmd;
 465        struct bnx2i_text_request *text_wqe;
 466        struct iscsi_text *text_hdr;
 467        u32 dword;
 468
 469        bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
 470        text_hdr = (struct iscsi_text *)mtask->hdr;
 471        text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe;
 472
 473        memset(text_wqe, 0, sizeof(struct bnx2i_text_request));
 474
 475        text_wqe->op_code = text_hdr->opcode;
 476        text_wqe->op_attr = text_hdr->flags;
 477        text_wqe->data_length = ntoh24(text_hdr->dlength);
 478        text_wqe->itt = mtask->itt |
 479                (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT);
 480        text_wqe->ttt = be32_to_cpu(text_hdr->ttt);
 481
 482        text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn);
 483
 484        text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
 485        text_wqe->resp_bd_list_addr_hi =
 486                        (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
 487
 488        dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) |
 489                 (bnx2i_conn->gen_pdu.resp_buf_size <<
 490                  ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
 491        text_wqe->resp_buffer = dword;
 492        text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
 493        text_wqe->bd_list_addr_hi =
 494                        (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
 495        text_wqe->num_bds = 1;
 496        text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 497
 498        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 499        return 0;
 500}
 501
 502
 503/**
 504 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
 505 * @conn:       iscsi connection
 506 * @cmd:        driver command structure which is requesting
 507 *              a WQE to sent to chip for further processing
 508 *
 509 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
 510 */
 511int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
 512                             struct bnx2i_cmd *cmd)
 513{
 514        struct bnx2i_cmd_request *scsi_cmd_wqe;
 515
 516        scsi_cmd_wqe = (struct bnx2i_cmd_request *)
 517                                                bnx2i_conn->ep->qp.sq_prod_qe;
 518        memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
 519        scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 520
 521        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 522        return 0;
 523}
 524
 525/**
 526 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
 527 * @conn:               iscsi connection
 528 * @cmd:                driver command structure which is requesting
 529 *                      a WQE to sent to chip for further processing
 530 * @datap:              payload buffer pointer
 531 * @data_len:           payload data length
 532 * @unsol:              indicated whether nopout pdu is unsolicited pdu or
 533 *                      in response to target's NOPIN w/ TTT != FFFFFFFF
 534 *
 535 * prepare and post a nopout request WQE to CNIC firmware
 536 */
 537int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
 538                            struct iscsi_task *task,
 539                            char *datap, int data_len, int unsol)
 540{
 541        struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 542        struct bnx2i_cmd *bnx2i_cmd;
 543        struct bnx2i_nop_out_request *nopout_wqe;
 544        struct iscsi_nopout *nopout_hdr;
 545
 546        bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 547        nopout_hdr = (struct iscsi_nopout *)task->hdr;
 548        nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
 549
 550        memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request));
 551
 552        nopout_wqe->op_code = nopout_hdr->opcode;
 553        nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
 554        memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8);
 555
 556        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 557                u32 tmp = nopout_wqe->lun[0];
 558                /* 57710 requires LUN field to be swapped */
 559                nopout_wqe->lun[0] = nopout_wqe->lun[1];
 560                nopout_wqe->lun[1] = tmp;
 561        }
 562
 563        nopout_wqe->itt = ((u16)task->itt |
 564                           (ISCSI_TASK_TYPE_MPATH <<
 565                            ISCSI_TMF_REQUEST_TYPE_SHIFT));
 566        nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt);
 567        nopout_wqe->flags = 0;
 568        if (!unsol)
 569                nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
 570        else if (nopout_hdr->itt == RESERVED_ITT)
 571                nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
 572
 573        nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
 574        nopout_wqe->data_length = data_len;
 575        if (data_len) {
 576                /* handle payload data, not required in first release */
 577                printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
 578        } else {
 579                nopout_wqe->bd_list_addr_lo = (u32)
 580                                        bnx2i_conn->hba->mp_bd_dma;
 581                nopout_wqe->bd_list_addr_hi =
 582                        (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 583                nopout_wqe->num_bds = 1;
 584        }
 585        nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 586
 587        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 588        return 0;
 589}
 590
 591
 592/**
 593 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
 594 * @conn:       iscsi connection
 595 * @cmd:        driver command structure which is requesting
 596 *              a WQE to sent to chip for further processing
 597 *
 598 * prepare and post logout request WQE to CNIC firmware
 599 */
 600int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
 601                            struct iscsi_task *task)
 602{
 603        struct bnx2i_cmd *bnx2i_cmd;
 604        struct bnx2i_logout_request *logout_wqe;
 605        struct iscsi_logout *logout_hdr;
 606
 607        bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 608        logout_hdr = (struct iscsi_logout *)task->hdr;
 609
 610        logout_wqe = (struct bnx2i_logout_request *)
 611                                                bnx2i_conn->ep->qp.sq_prod_qe;
 612        memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
 613
 614        logout_wqe->op_code = logout_hdr->opcode;
 615        logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
 616        logout_wqe->op_attr =
 617                        logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
 618        logout_wqe->itt = ((u16)task->itt |
 619                           (ISCSI_TASK_TYPE_MPATH <<
 620                            ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
 621        logout_wqe->data_length = 0;
 622        logout_wqe->cid = 0;
 623
 624        logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
 625        logout_wqe->bd_list_addr_hi = (u32)
 626                                ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 627        logout_wqe->num_bds = 1;
 628        logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 629
 630        bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;
 631
 632        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 633        return 0;
 634}
 635
 636
 637/**
 638 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
 639 * @conn:       iscsi connection which requires iscsi parameter update
 640 *
 641 * sends down iSCSI Conn Update request to move iSCSI conn to FFP
 642 */
 643void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
 644{
 645        struct bnx2i_conn *bnx2i_conn = conn->dd_data;
 646        struct bnx2i_hba *hba = bnx2i_conn->hba;
 647        struct kwqe *kwqe_arr[2];
 648        struct iscsi_kwqe_conn_update *update_wqe;
 649        struct iscsi_kwqe_conn_update conn_update_kwqe;
 650
 651        update_wqe = &conn_update_kwqe;
 652
 653        update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
 654        update_wqe->hdr.flags =
 655                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 656
 657        /* 5771x requires conn context id to be passed as is */
 658        if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
 659                update_wqe->context_id = bnx2i_conn->ep->ep_cid;
 660        else
 661                update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
 662        update_wqe->conn_flags = 0;
 663        if (conn->hdrdgst_en)
 664                update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
 665        if (conn->datadgst_en)
 666                update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
 667        if (conn->session->initial_r2t_en)
 668                update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
 669        if (conn->session->imm_data_en)
 670                update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
 671
 672        update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
 673        update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
 674        update_wqe->first_burst_length = conn->session->first_burst;
 675        update_wqe->max_burst_length = conn->session->max_burst;
 676        update_wqe->exp_stat_sn = conn->exp_statsn;
 677        update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
 678        update_wqe->session_error_recovery_level = conn->session->erl;
 679        iscsi_conn_printk(KERN_ALERT, conn,
 680                          "bnx2i: conn update - MBL 0x%x FBL 0x%x"
 681                          "MRDSL_I 0x%x MRDSL_T 0x%x \n",
 682                          update_wqe->max_burst_length,
 683                          update_wqe->first_burst_length,
 684                          update_wqe->max_recv_pdu_length,
 685                          update_wqe->max_send_pdu_length);
 686
 687        kwqe_arr[0] = (struct kwqe *) update_wqe;
 688        if (hba->cnic && hba->cnic->submit_kwqes)
 689                hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
 690}
 691
 692
 693/**
 694 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
 695 * @data:       endpoint (transport handle) structure pointer
 696 *
 697 * routine to handle connection offload/destroy request timeout
 698 */
 699void bnx2i_ep_ofld_timer(unsigned long data)
 700{
 701        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;
 702
 703        if (ep->state == EP_STATE_OFLD_START) {
 704                printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
 705                ep->state = EP_STATE_OFLD_FAILED;
 706        } else if (ep->state == EP_STATE_DISCONN_START) {
 707                printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
 708                ep->state = EP_STATE_DISCONN_TIMEDOUT;
 709        } else if (ep->state == EP_STATE_CLEANUP_START) {
 710                printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
 711                ep->state = EP_STATE_CLEANUP_FAILED;
 712        }
 713
 714        wake_up_interruptible(&ep->ofld_wait);
 715}
 716
 717
 718static int bnx2i_power_of2(u32 val)
 719{
 720        u32 power = 0;
 721        if (val & (val - 1))
 722                return power;
 723        val--;
 724        while (val) {
 725                val = val >> 1;
 726                power++;
 727        }
 728        return power;
 729}
 730
 731
 732/**
 733 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
 734 * @hba:        adapter structure pointer
 735 * @cmd:        driver command structure which is requesting
 736 *              a WQE to sent to chip for further processing
 737 *
 738 * prepares and posts CONN_OFLD_REQ1/2 KWQE
 739 */
 740void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
 741{
 742        struct bnx2i_cleanup_request *cmd_cleanup;
 743
 744        cmd_cleanup =
 745                (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
 746        memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
 747
 748        cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
 749        cmd_cleanup->itt = cmd->req.itt;
 750        cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
 751
 752        bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
 753}
 754
 755
 756/**
 757 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
 758 * @hba:        adapter structure pointer
 759 * @ep:         endpoint (transport indentifier) structure
 760 *
 761 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
 762 *      iscsi connection context clean-up process
 763 */
 764int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 765{
 766        struct kwqe *kwqe_arr[2];
 767        struct iscsi_kwqe_conn_destroy conn_cleanup;
 768        int rc = -EINVAL;
 769
 770        memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
 771
 772        conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
 773        conn_cleanup.hdr.flags =
 774                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 775        /* 5771x requires conn context id to be passed as is */
 776        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 777                conn_cleanup.context_id = ep->ep_cid;
 778        else
 779                conn_cleanup.context_id = (ep->ep_cid >> 7);
 780
 781        conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
 782
 783        kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
 784        if (hba->cnic && hba->cnic->submit_kwqes)
 785                rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
 786
 787        return rc;
 788}
 789
 790
 791/**
 792 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
 793 * @hba:                adapter structure pointer
 794 * @ep:                 endpoint (transport indentifier) structure
 795 *
 796 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 797 */
 798static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
 799                                         struct bnx2i_endpoint *ep)
 800{
 801        struct kwqe *kwqe_arr[2];
 802        struct iscsi_kwqe_conn_offload1 ofld_req1;
 803        struct iscsi_kwqe_conn_offload2 ofld_req2;
 804        dma_addr_t dma_addr;
 805        int num_kwqes = 2;
 806        u32 *ptbl;
 807        int rc = -EINVAL;
 808
 809        ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
 810        ofld_req1.hdr.flags =
 811                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 812
 813        ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
 814
 815        dma_addr = ep->qp.sq_pgtbl_phys;
 816        ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
 817        ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 818
 819        dma_addr = ep->qp.cq_pgtbl_phys;
 820        ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
 821        ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 822
 823        ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
 824        ofld_req2.hdr.flags =
 825                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 826
 827        dma_addr = ep->qp.rq_pgtbl_phys;
 828        ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
 829        ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 830
 831        ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
 832
 833        ofld_req2.sq_first_pte.hi = *ptbl++;
 834        ofld_req2.sq_first_pte.lo = *ptbl;
 835
 836        ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
 837        ofld_req2.cq_first_pte.hi = *ptbl++;
 838        ofld_req2.cq_first_pte.lo = *ptbl;
 839
 840        kwqe_arr[0] = (struct kwqe *) &ofld_req1;
 841        kwqe_arr[1] = (struct kwqe *) &ofld_req2;
 842        ofld_req2.num_additional_wqes = 0;
 843
 844        if (hba->cnic && hba->cnic->submit_kwqes)
 845                rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
 846
 847        return rc;
 848}
 849
 850
 851/**
 852 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
 853 * @hba:                adapter structure pointer
 854 * @ep:                 endpoint (transport indentifier) structure
 855 *
 856 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 857 */
 858static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
 859                                          struct bnx2i_endpoint *ep)
 860{
 861        struct kwqe *kwqe_arr[5];
 862        struct iscsi_kwqe_conn_offload1 ofld_req1;
 863        struct iscsi_kwqe_conn_offload2 ofld_req2;
 864        struct iscsi_kwqe_conn_offload3 ofld_req3[1];
 865        dma_addr_t dma_addr;
 866        int num_kwqes = 2;
 867        u32 *ptbl;
 868        int rc = -EINVAL;
 869
 870        ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
 871        ofld_req1.hdr.flags =
 872                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 873
 874        ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
 875
 876        dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
 877        ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
 878        ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 879
 880        dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
 881        ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
 882        ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 883
 884        ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
 885        ofld_req2.hdr.flags =
 886                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 887
 888        dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
 889        ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
 890        ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 891
 892        ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
 893        ofld_req2.sq_first_pte.hi = *ptbl++;
 894        ofld_req2.sq_first_pte.lo = *ptbl;
 895
 896        ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
 897        ofld_req2.cq_first_pte.hi = *ptbl++;
 898        ofld_req2.cq_first_pte.lo = *ptbl;
 899
 900        kwqe_arr[0] = (struct kwqe *) &ofld_req1;
 901        kwqe_arr[1] = (struct kwqe *) &ofld_req2;
 902
 903        ofld_req2.num_additional_wqes = 1;
 904        memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
 905        ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
 906        ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
 907        ofld_req3[0].qp_first_pte[0].lo = *ptbl;
 908
 909        kwqe_arr[2] = (struct kwqe *) ofld_req3;
 910        /* need if we decide to go with multiple KCQE's per conn */
 911        num_kwqes += 1;
 912
 913        if (hba->cnic && hba->cnic->submit_kwqes)
 914                rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
 915
 916        return rc;
 917}
 918
 919/**
 920 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
 921 *
 922 * @hba:                adapter structure pointer
 923 * @ep:                 endpoint (transport indentifier) structure
 924 *
 925 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
 926 */
 927int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 928{
 929        int rc;
 930
 931        if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
 932                rc = bnx2i_5771x_send_conn_ofld_req(hba, ep);
 933        else
 934                rc = bnx2i_570x_send_conn_ofld_req(hba, ep);
 935
 936        return rc;
 937}
 938
 939
 940/**
 941 * setup_qp_page_tables - iscsi QP page table setup function
 942 * @ep:         endpoint (transport indentifier) structure
 943 *
 944 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
 945 *      64-bit address in big endian format. Whereas 10G/sec (57710) requires
 946 *      PT in little endian format
 947 */
 948static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
 949{
 950        int num_pages;
 951        u32 *ptbl;
 952        dma_addr_t page;
 953        int cnic_dev_10g;
 954
 955        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 956                cnic_dev_10g = 1;
 957        else
 958                cnic_dev_10g = 0;
 959
 960        /* SQ page table */
 961        memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
 962        num_pages = ep->qp.sq_mem_size / PAGE_SIZE;
 963        page = ep->qp.sq_phys;
 964
 965        if (cnic_dev_10g)
 966                ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
 967        else
 968                ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
 969        while (num_pages--) {
 970                if (cnic_dev_10g) {
 971                        /* PTE is written in little endian format for 57710 */
 972                        *ptbl = (u32) page;
 973                        ptbl++;
 974                        *ptbl = (u32) ((u64) page >> 32);
 975                        ptbl++;
 976                        page += PAGE_SIZE;
 977                } else {
 978                        /* PTE is written in big endian format for
 979                         * 5706/5708/5709 devices */
 980                        *ptbl = (u32) ((u64) page >> 32);
 981                        ptbl++;
 982                        *ptbl = (u32) page;
 983                        ptbl++;
 984                        page += PAGE_SIZE;
 985                }
 986        }
 987
 988        /* RQ page table */
 989        memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
 990        num_pages = ep->qp.rq_mem_size / PAGE_SIZE;
 991        page = ep->qp.rq_phys;
 992
 993        if (cnic_dev_10g)
 994                ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
 995        else
 996                ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
 997        while (num_pages--) {
 998                if (cnic_dev_10g) {
 999                        /* PTE is written in little endian format for 57710 */
1000                        *ptbl = (u32) page;
1001                        ptbl++;
1002                        *ptbl = (u32) ((u64) page >> 32);
1003                        ptbl++;
1004                        page += PAGE_SIZE;
1005                } else {
1006                        /* PTE is written in big endian format for
1007                         * 5706/5708/5709 devices */
1008                        *ptbl = (u32) ((u64) page >> 32);
1009                        ptbl++;
1010                        *ptbl = (u32) page;
1011                        ptbl++;
1012                        page += PAGE_SIZE;
1013                }
1014        }
1015
1016        /* CQ page table */
1017        memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
1018        num_pages = ep->qp.cq_mem_size / PAGE_SIZE;
1019        page = ep->qp.cq_phys;
1020
1021        if (cnic_dev_10g)
1022                ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
1023        else
1024                ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
1025        while (num_pages--) {
1026                if (cnic_dev_10g) {
1027                        /* PTE is written in little endian format for 57710 */
1028                        *ptbl = (u32) page;
1029                        ptbl++;
1030                        *ptbl = (u32) ((u64) page >> 32);
1031                        ptbl++;
1032                        page += PAGE_SIZE;
1033                } else {
1034                        /* PTE is written in big endian format for
1035                         * 5706/5708/5709 devices */
1036                        *ptbl = (u32) ((u64) page >> 32);
1037                        ptbl++;
1038                        *ptbl = (u32) page;
1039                        ptbl++;
1040                        page += PAGE_SIZE;
1041                }
1042        }
1043}
1044
1045
1046/**
1047 * bnx2i_alloc_qp_resc - allocates required resources for QP.
1048 * @hba:        adapter structure pointer
1049 * @ep:         endpoint (transport indentifier) structure
1050 *
1051 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
1052 *      memory for SQ/RQ/CQ and page tables. EP structure elements such
1053 *      as producer/consumer indexes/pointers, queue sizes and page table
1054 *      contents are setup
1055 */
1056int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1057{
1058        struct bnx2i_5771x_cq_db *cq_db;
1059
1060        ep->hba = hba;
1061        ep->conn = NULL;
1062        ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
1063
1064        /* Allocate page table memory for SQ which is page aligned */
1065        ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
1066        ep->qp.sq_mem_size =
1067                (ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1068        ep->qp.sq_pgtbl_size =
1069                (ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *);
1070        ep->qp.sq_pgtbl_size =
1071                (ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1072
1073        ep->qp.sq_pgtbl_virt =
1074                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1075                                   &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
1076        if (!ep->qp.sq_pgtbl_virt) {
1077                printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
1078                                  ep->qp.sq_pgtbl_size);
1079                goto mem_alloc_err;
1080        }
1081
1082        /* Allocate memory area for actual SQ element */
1083        ep->qp.sq_virt =
1084                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1085                                   &ep->qp.sq_phys, GFP_KERNEL);
1086        if (!ep->qp.sq_virt) {
1087                printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1088                                  ep->qp.sq_mem_size);
1089                goto mem_alloc_err;
1090        }
1091
1092        memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
1093        ep->qp.sq_first_qe = ep->qp.sq_virt;
1094        ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1095        ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1096        ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1097        ep->qp.sq_prod_idx = 0;
1098        ep->qp.sq_cons_idx = 0;
1099        ep->qp.sqe_left = hba->max_sqes;
1100
1101        /* Allocate page table memory for CQ which is page aligned */
1102        ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1103        ep->qp.cq_mem_size =
1104                (ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1105        ep->qp.cq_pgtbl_size =
1106                (ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *);
1107        ep->qp.cq_pgtbl_size =
1108                (ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1109
1110        ep->qp.cq_pgtbl_virt =
1111                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1112                                   &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1113        if (!ep->qp.cq_pgtbl_virt) {
1114                printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1115                                  ep->qp.cq_pgtbl_size);
1116                goto mem_alloc_err;
1117        }
1118
1119        /* Allocate memory area for actual CQ element */
1120        ep->qp.cq_virt =
1121                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1122                                   &ep->qp.cq_phys, GFP_KERNEL);
1123        if (!ep->qp.cq_virt) {
1124                printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1125                                  ep->qp.cq_mem_size);
1126                goto mem_alloc_err;
1127        }
1128        memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
1129
1130        ep->qp.cq_first_qe = ep->qp.cq_virt;
1131        ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1132        ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1133        ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1134        ep->qp.cq_prod_idx = 0;
1135        ep->qp.cq_cons_idx = 0;
1136        ep->qp.cqe_left = hba->max_cqes;
1137        ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1138        ep->qp.cqe_size = hba->max_cqes;
1139
1140        /* Invalidate all EQ CQE index, req only for 57710 */
1141        cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1142        memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1143
1144        /* Allocate page table memory for RQ which is page aligned */
1145        ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1146        ep->qp.rq_mem_size =
1147                (ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1148        ep->qp.rq_pgtbl_size =
1149                (ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *);
1150        ep->qp.rq_pgtbl_size =
1151                (ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1152
1153        ep->qp.rq_pgtbl_virt =
1154                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1155                                   &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1156        if (!ep->qp.rq_pgtbl_virt) {
1157                printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1158                                  ep->qp.rq_pgtbl_size);
1159                goto mem_alloc_err;
1160        }
1161
1162        /* Allocate memory area for actual RQ element */
1163        ep->qp.rq_virt =
1164                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1165                                   &ep->qp.rq_phys, GFP_KERNEL);
1166        if (!ep->qp.rq_virt) {
1167                printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1168                                  ep->qp.rq_mem_size);
1169                goto mem_alloc_err;
1170        }
1171
1172        ep->qp.rq_first_qe = ep->qp.rq_virt;
1173        ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1174        ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1175        ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1176        ep->qp.rq_prod_idx = 0x8000;
1177        ep->qp.rq_cons_idx = 0;
1178        ep->qp.rqe_left = hba->max_rqes;
1179
1180        setup_qp_page_tables(ep);
1181
1182        return 0;
1183
1184mem_alloc_err:
1185        bnx2i_free_qp_resc(hba, ep);
1186        return -ENOMEM;
1187}
1188
1189
1190
1191/**
1192 * bnx2i_free_qp_resc - free memory resources held by QP
1193 * @hba:        adapter structure pointer
1194 * @ep: endpoint (transport indentifier) structure
1195 *
1196 * Free QP resources - SQ/RQ/CQ memory and page tables.
1197 */
1198void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1199{
1200        if (ep->qp.ctx_base) {
1201                iounmap(ep->qp.ctx_base);
1202                ep->qp.ctx_base = NULL;
1203        }
1204        /* Free SQ mem */
1205        if (ep->qp.sq_pgtbl_virt) {
1206                dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1207                                  ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1208                ep->qp.sq_pgtbl_virt = NULL;
1209                ep->qp.sq_pgtbl_phys = 0;
1210        }
1211        if (ep->qp.sq_virt) {
1212                dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1213                                  ep->qp.sq_virt, ep->qp.sq_phys);
1214                ep->qp.sq_virt = NULL;
1215                ep->qp.sq_phys = 0;
1216        }
1217
1218        /* Free RQ mem */
1219        if (ep->qp.rq_pgtbl_virt) {
1220                dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1221                                  ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1222                ep->qp.rq_pgtbl_virt = NULL;
1223                ep->qp.rq_pgtbl_phys = 0;
1224        }
1225        if (ep->qp.rq_virt) {
1226                dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1227                                  ep->qp.rq_virt, ep->qp.rq_phys);
1228                ep->qp.rq_virt = NULL;
1229                ep->qp.rq_phys = 0;
1230        }
1231
1232        /* Free CQ mem */
1233        if (ep->qp.cq_pgtbl_virt) {
1234                dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1235                                  ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1236                ep->qp.cq_pgtbl_virt = NULL;
1237                ep->qp.cq_pgtbl_phys = 0;
1238        }
1239        if (ep->qp.cq_virt) {
1240                dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1241                                  ep->qp.cq_virt, ep->qp.cq_phys);
1242                ep->qp.cq_virt = NULL;
1243                ep->qp.cq_phys = 0;
1244        }
1245}
1246
1247
1248/**
1249 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1250 * @hba:        adapter structure pointer
1251 *
1252 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1253 *      This results in iSCSi support validation and on-chip context manager
1254 *      initialization.  Firmware completes this handshake with a CQE carrying
1255 *      the result of iscsi support validation. Parameter carried by
1256 *      iscsi init request determines the number of offloaded connection and
1257 *      tolerance level for iscsi protocol violation this hba/chip can support
1258 */
1259int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1260{
1261        struct kwqe *kwqe_arr[3];
1262        struct iscsi_kwqe_init1 iscsi_init;
1263        struct iscsi_kwqe_init2 iscsi_init2;
1264        int rc = 0;
1265        u64 mask64;
1266
1267        bnx2i_adjust_qp_size(hba);
1268
1269        iscsi_init.flags =
1270                ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1271        if (en_tcp_dack)
1272                iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1273        iscsi_init.reserved0 = 0;
1274        iscsi_init.num_cqs = 1;
1275        iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1276        iscsi_init.hdr.flags =
1277                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1278
1279        iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1280        iscsi_init.dummy_buffer_addr_hi =
1281                (u32) ((u64) hba->dummy_buf_dma >> 32);
1282
1283        hba->num_ccell = hba->max_sqes >> 1;
1284        hba->ctx_ccell_tasks =
1285                        ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1286        iscsi_init.num_ccells_per_conn = hba->num_ccell;
1287        iscsi_init.num_tasks_per_conn = hba->max_sqes;
1288        iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1289        iscsi_init.sq_num_wqes = hba->max_sqes;
1290        iscsi_init.cq_log_wqes_per_page =
1291                (u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE);
1292        iscsi_init.cq_num_wqes = hba->max_cqes;
1293        iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1294                                   (PAGE_SIZE - 1)) / PAGE_SIZE;
1295        iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1296                                   (PAGE_SIZE - 1)) / PAGE_SIZE;
1297        iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1298        iscsi_init.rq_num_wqes = hba->max_rqes;
1299
1300
1301        iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1302        iscsi_init2.hdr.flags =
1303                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1304        iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1305        mask64 = 0x0ULL;
1306        mask64 |= (
1307                /* CISCO MDS */
1308                (1UL <<
1309                  ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1310                /* HP MSA1510i */
1311                (1UL <<
1312                  ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1313                /* EMC */
1314                (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1315        if (error_mask1)
1316                iscsi_init2.error_bit_map[0] = error_mask1;
1317        else
1318                iscsi_init2.error_bit_map[0] = (u32) mask64;
1319
1320        if (error_mask2)
1321                iscsi_init2.error_bit_map[1] = error_mask2;
1322        else
1323                iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1324
1325        iscsi_error_mask = mask64;
1326
1327        kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1328        kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1329
1330        if (hba->cnic && hba->cnic->submit_kwqes)
1331                rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1332        return rc;
1333}
1334
1335
1336/**
1337 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1338 * @session:    iscsi session
1339 * @bnx2i_conn: bnx2i connection
1340 * @cqe:        pointer to newly DMA'ed CQE entry for processing
1341 *
1342 * process SCSI CMD Response CQE & complete the request to SCSI-ML
1343 */
1344int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1345                                struct bnx2i_conn *bnx2i_conn,
1346                                struct cqe *cqe)
1347{
1348        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1349        struct bnx2i_cmd_response *resp_cqe;
1350        struct bnx2i_cmd *bnx2i_cmd;
1351        struct iscsi_task *task;
1352        struct iscsi_scsi_rsp *hdr;
1353        u32 datalen = 0;
1354
1355        resp_cqe = (struct bnx2i_cmd_response *)cqe;
1356        spin_lock_bh(&session->lock);
1357        task = iscsi_itt_to_task(conn,
1358                                 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1359        if (!task)
1360                goto fail;
1361
1362        bnx2i_cmd = task->dd_data;
1363
1364        if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1365                conn->datain_pdus_cnt +=
1366                        resp_cqe->task_stat.read_stat.num_data_outs;
1367                conn->rxdata_octets +=
1368                        bnx2i_cmd->req.total_data_transfer_length;
1369        } else {
1370                conn->dataout_pdus_cnt +=
1371                        resp_cqe->task_stat.read_stat.num_data_outs;
1372                conn->r2t_pdus_cnt +=
1373                        resp_cqe->task_stat.read_stat.num_r2ts;
1374                conn->txdata_octets +=
1375                        bnx2i_cmd->req.total_data_transfer_length;
1376        }
1377        bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1378
1379        hdr = (struct iscsi_scsi_rsp *)task->hdr;
1380        resp_cqe = (struct bnx2i_cmd_response *)cqe;
1381        hdr->opcode = resp_cqe->op_code;
1382        hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1383        hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1384        hdr->response = resp_cqe->response;
1385        hdr->cmd_status = resp_cqe->status;
1386        hdr->flags = resp_cqe->response_flags;
1387        hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1388
1389        if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1390                goto done;
1391
1392        if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1393                datalen = resp_cqe->data_length;
1394                if (datalen < 2)
1395                        goto done;
1396
1397                if (datalen > BNX2I_RQ_WQE_SIZE) {
1398                        iscsi_conn_printk(KERN_ERR, conn,
1399                                          "sense data len %d > RQ sz\n",
1400                                          datalen);
1401                        datalen = BNX2I_RQ_WQE_SIZE;
1402                } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1403                        iscsi_conn_printk(KERN_ERR, conn,
1404                                          "sense data len %d > conn data\n",
1405                                          datalen);
1406                        datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1407                }
1408
1409                bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1410                bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1411        }
1412
1413done:
1414        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1415                             conn->data, datalen);
1416fail:
1417        spin_unlock_bh(&session->lock);
1418        return 0;
1419}
1420
1421
1422/**
1423 * bnx2i_process_login_resp - this function handles iscsi login response
1424 * @session:            iscsi session pointer
1425 * @bnx2i_conn:         iscsi connection pointer
1426 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1427 *
1428 * process Login Response CQE & complete it to open-iscsi user daemon
1429 */
1430static int bnx2i_process_login_resp(struct iscsi_session *session,
1431                                    struct bnx2i_conn *bnx2i_conn,
1432                                    struct cqe *cqe)
1433{
1434        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1435        struct iscsi_task *task;
1436        struct bnx2i_login_response *login;
1437        struct iscsi_login_rsp *resp_hdr;
1438        int pld_len;
1439        int pad_len;
1440
1441        login = (struct bnx2i_login_response *) cqe;
1442        spin_lock(&session->lock);
1443        task = iscsi_itt_to_task(conn,
1444                                 login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1445        if (!task)
1446                goto done;
1447
1448        resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1449        memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1450        resp_hdr->opcode = login->op_code;
1451        resp_hdr->flags = login->response_flags;
1452        resp_hdr->max_version = login->version_max;
1453        resp_hdr->active_version = login->version_active;
1454        resp_hdr->hlength = 0;
1455
1456        hton24(resp_hdr->dlength, login->data_length);
1457        memcpy(resp_hdr->isid, &login->isid_lo, 6);
1458        resp_hdr->tsih = cpu_to_be16(login->tsih);
1459        resp_hdr->itt = task->hdr->itt;
1460        resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1461        resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1462        resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1463        resp_hdr->status_class = login->status_class;
1464        resp_hdr->status_detail = login->status_detail;
1465        pld_len = login->data_length;
1466        bnx2i_conn->gen_pdu.resp_wr_ptr =
1467                                        bnx2i_conn->gen_pdu.resp_buf + pld_len;
1468
1469        pad_len = 0;
1470        if (pld_len & 0x3)
1471                pad_len = 4 - (pld_len % 4);
1472
1473        if (pad_len) {
1474                int i = 0;
1475                for (i = 0; i < pad_len; i++) {
1476                        bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1477                        bnx2i_conn->gen_pdu.resp_wr_ptr++;
1478                }
1479        }
1480
1481        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1482                bnx2i_conn->gen_pdu.resp_buf,
1483                bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1484done:
1485        spin_unlock(&session->lock);
1486        return 0;
1487}
1488
1489
1490/**
1491 * bnx2i_process_text_resp - this function handles iscsi text response
1492 * @session:    iscsi session pointer
1493 * @bnx2i_conn: iscsi connection pointer
1494 * @cqe:        pointer to newly DMA'ed CQE entry for processing
1495 *
1496 * process iSCSI Text Response CQE&  complete it to open-iscsi user daemon
1497 */
1498static int bnx2i_process_text_resp(struct iscsi_session *session,
1499                                   struct bnx2i_conn *bnx2i_conn,
1500                                   struct cqe *cqe)
1501{
1502        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1503        struct iscsi_task *task;
1504        struct bnx2i_text_response *text;
1505        struct iscsi_text_rsp *resp_hdr;
1506        int pld_len;
1507        int pad_len;
1508
1509        text = (struct bnx2i_text_response *) cqe;
1510        spin_lock(&session->lock);
1511        task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1512        if (!task)
1513                goto done;
1514
1515        resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr;
1516        memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1517        resp_hdr->opcode = text->op_code;
1518        resp_hdr->flags = text->response_flags;
1519        resp_hdr->hlength = 0;
1520
1521        hton24(resp_hdr->dlength, text->data_length);
1522        resp_hdr->itt = task->hdr->itt;
1523        resp_hdr->ttt = cpu_to_be32(text->ttt);
1524        resp_hdr->statsn = task->hdr->exp_statsn;
1525        resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn);
1526        resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn);
1527        pld_len = text->data_length;
1528        bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf +
1529                                          pld_len;
1530        pad_len = 0;
1531        if (pld_len & 0x3)
1532                pad_len = 4 - (pld_len % 4);
1533
1534        if (pad_len) {
1535                int i = 0;
1536                for (i = 0; i < pad_len; i++) {
1537                        bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1538                        bnx2i_conn->gen_pdu.resp_wr_ptr++;
1539                }
1540        }
1541        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1542                             bnx2i_conn->gen_pdu.resp_buf,
1543                             bnx2i_conn->gen_pdu.resp_wr_ptr -
1544                             bnx2i_conn->gen_pdu.resp_buf);
1545done:
1546        spin_unlock(&session->lock);
1547        return 0;
1548}
1549
1550
1551/**
1552 * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1553 * @session:            iscsi session pointer
1554 * @bnx2i_conn:         iscsi connection pointer
1555 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1556 *
1557 * process iSCSI TMF Response CQE and wake up the driver eh thread.
1558 */
1559static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1560                                  struct bnx2i_conn *bnx2i_conn,
1561                                  struct cqe *cqe)
1562{
1563        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1564        struct iscsi_task *task;
1565        struct bnx2i_tmf_response *tmf_cqe;
1566        struct iscsi_tm_rsp *resp_hdr;
1567
1568        tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1569        spin_lock(&session->lock);
1570        task = iscsi_itt_to_task(conn,
1571                                 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1572        if (!task)
1573                goto done;
1574
1575        resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1576        memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1577        resp_hdr->opcode = tmf_cqe->op_code;
1578        resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1579        resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1580        resp_hdr->itt = task->hdr->itt;
1581        resp_hdr->response = tmf_cqe->response;
1582
1583        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1584done:
1585        spin_unlock(&session->lock);
1586        return 0;
1587}
1588
1589/**
1590 * bnx2i_process_logout_resp - this function handles iscsi logout response
1591 * @session:            iscsi session pointer
1592 * @bnx2i_conn:         iscsi connection pointer
1593 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1594 *
1595 * process iSCSI Logout Response CQE & make function call to
1596 * notify the user daemon.
1597 */
1598static int bnx2i_process_logout_resp(struct iscsi_session *session,
1599                                     struct bnx2i_conn *bnx2i_conn,
1600                                     struct cqe *cqe)
1601{
1602        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1603        struct iscsi_task *task;
1604        struct bnx2i_logout_response *logout;
1605        struct iscsi_logout_rsp *resp_hdr;
1606
1607        logout = (struct bnx2i_logout_response *) cqe;
1608        spin_lock(&session->lock);
1609        task = iscsi_itt_to_task(conn,
1610                                 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1611        if (!task)
1612                goto done;
1613
1614        resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1615        memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1616        resp_hdr->opcode = logout->op_code;
1617        resp_hdr->flags = logout->response;
1618        resp_hdr->hlength = 0;
1619
1620        resp_hdr->itt = task->hdr->itt;
1621        resp_hdr->statsn = task->hdr->exp_statsn;
1622        resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1623        resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1624
1625        resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1626        resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1627
1628        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1629
1630        bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;
1631done:
1632        spin_unlock(&session->lock);
1633        return 0;
1634}
1635
1636/**
1637 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1638 * @session:            iscsi session pointer
1639 * @bnx2i_conn:         iscsi connection pointer
1640 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1641 *
1642 * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1643 */
1644static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1645                                           struct bnx2i_conn *bnx2i_conn,
1646                                           struct cqe *cqe)
1647{
1648        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1649        struct bnx2i_nop_in_msg *nop_in;
1650        struct iscsi_task *task;
1651
1652        nop_in = (struct bnx2i_nop_in_msg *)cqe;
1653        spin_lock(&session->lock);
1654        task = iscsi_itt_to_task(conn,
1655                                 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1656        if (task)
1657                __iscsi_put_task(task);
1658        spin_unlock(&session->lock);
1659}
1660
1661/**
1662 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1663 * @conn:       iscsi connection
1664 *
1665 * Firmware advances RQ producer index for every unsolicited PDU even if
1666 *      payload data length is '0'. This function makes corresponding
1667 *      adjustments on the driver side to match this f/w behavior
1668 */
1669static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1670{
1671        char dummy_rq_data[2];
1672        bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1673        bnx2i_put_rq_buf(bnx2i_conn, 1);
1674}
1675
1676
1677/**
1678 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1679 * @session:            iscsi session pointer
1680 * @bnx2i_conn:         iscsi connection pointer
1681 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1682 *
1683 * process iSCSI target's proactive iSCSI NOPIN request
1684 */
1685static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1686                                     struct bnx2i_conn *bnx2i_conn,
1687                                     struct cqe *cqe)
1688{
1689        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1690        struct iscsi_task *task;
1691        struct bnx2i_nop_in_msg *nop_in;
1692        struct iscsi_nopin *hdr;
1693        int tgt_async_nop = 0;
1694
1695        nop_in = (struct bnx2i_nop_in_msg *)cqe;
1696
1697        spin_lock(&session->lock);
1698        hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1699        memset(hdr, 0, sizeof(struct iscsi_hdr));
1700        hdr->opcode = nop_in->op_code;
1701        hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1702        hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1703        hdr->ttt = cpu_to_be32(nop_in->ttt);
1704
1705        if (nop_in->itt == (u16) RESERVED_ITT) {
1706                bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1707                hdr->itt = RESERVED_ITT;
1708                tgt_async_nop = 1;
1709                goto done;
1710        }
1711
1712        /* this is a response to one of our nop-outs */
1713        task = iscsi_itt_to_task(conn,
1714                         (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX));
1715        if (task) {
1716                hdr->flags = ISCSI_FLAG_CMD_FINAL;
1717                hdr->itt = task->hdr->itt;
1718                hdr->ttt = cpu_to_be32(nop_in->ttt);
1719                memcpy(&hdr->lun, nop_in->lun, 8);
1720        }
1721done:
1722        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1723        spin_unlock(&session->lock);
1724
1725        return tgt_async_nop;
1726}
1727
1728
1729/**
1730 * bnx2i_process_async_mesg - this function handles iscsi async message
1731 * @session:            iscsi session pointer
1732 * @bnx2i_conn:         iscsi connection pointer
1733 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1734 *
1735 * process iSCSI ASYNC Message
1736 */
1737static void bnx2i_process_async_mesg(struct iscsi_session *session,
1738                                     struct bnx2i_conn *bnx2i_conn,
1739                                     struct cqe *cqe)
1740{
1741        struct bnx2i_async_msg *async_cqe;
1742        struct iscsi_async *resp_hdr;
1743        u8 async_event;
1744
1745        bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1746
1747        async_cqe = (struct bnx2i_async_msg *)cqe;
1748        async_event = async_cqe->async_event;
1749
1750        if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1751                iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1752                                  "async: scsi events not supported\n");
1753                return;
1754        }
1755
1756        spin_lock(&session->lock);
1757        resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1758        memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1759        resp_hdr->opcode = async_cqe->op_code;
1760        resp_hdr->flags = 0x80;
1761
1762        memcpy(&resp_hdr->lun, async_cqe->lun, 8);
1763        resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1764        resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1765
1766        resp_hdr->async_event = async_cqe->async_event;
1767        resp_hdr->async_vcode = async_cqe->async_vcode;
1768
1769        resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1770        resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1771        resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1772
1773        __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1774                             (struct iscsi_hdr *)resp_hdr, NULL, 0);
1775        spin_unlock(&session->lock);
1776}
1777
1778
1779/**
1780 * bnx2i_process_reject_mesg - process iscsi reject pdu
1781 * @session:            iscsi session pointer
1782 * @bnx2i_conn:         iscsi connection pointer
1783 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1784 *
1785 * process iSCSI REJECT message
1786 */
1787static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1788                                      struct bnx2i_conn *bnx2i_conn,
1789                                      struct cqe *cqe)
1790{
1791        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1792        struct bnx2i_reject_msg *reject;
1793        struct iscsi_reject *hdr;
1794
1795        reject = (struct bnx2i_reject_msg *) cqe;
1796        if (reject->data_length) {
1797                bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1798                bnx2i_put_rq_buf(bnx2i_conn, 1);
1799        } else
1800                bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1801
1802        spin_lock(&session->lock);
1803        hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1804        memset(hdr, 0, sizeof(struct iscsi_hdr));
1805        hdr->opcode = reject->op_code;
1806        hdr->reason = reject->reason;
1807        hton24(hdr->dlength, reject->data_length);
1808        hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1809        hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1810        hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1811        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1812                             reject->data_length);
1813        spin_unlock(&session->lock);
1814}
1815
1816/**
1817 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1818 * @session:            iscsi session pointer
1819 * @bnx2i_conn:         iscsi connection pointer
1820 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1821 *
1822 * process command cleanup response CQE during conn shutdown or error recovery
1823 */
1824static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1825                                           struct bnx2i_conn *bnx2i_conn,
1826                                           struct cqe *cqe)
1827{
1828        struct bnx2i_cleanup_response *cmd_clean_rsp;
1829        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1830        struct iscsi_task *task;
1831
1832        cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1833        spin_lock(&session->lock);
1834        task = iscsi_itt_to_task(conn,
1835                        cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1836        if (!task)
1837                printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1838                        cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1839        spin_unlock(&session->lock);
1840        complete(&bnx2i_conn->cmd_cleanup_cmpl);
1841}
1842
1843
1844/**
1845 * bnx2i_percpu_io_thread - thread per cpu for ios
1846 *
1847 * @arg:        ptr to bnx2i_percpu_info structure
1848 */
1849int bnx2i_percpu_io_thread(void *arg)
1850{
1851        struct bnx2i_percpu_s *p = arg;
1852        struct bnx2i_work *work, *tmp;
1853        LIST_HEAD(work_list);
1854
1855        set_user_nice(current, -20);
1856
1857        while (!kthread_should_stop()) {
1858                spin_lock_bh(&p->p_work_lock);
1859                while (!list_empty(&p->work_list)) {
1860                        list_splice_init(&p->work_list, &work_list);
1861                        spin_unlock_bh(&p->p_work_lock);
1862
1863                        list_for_each_entry_safe(work, tmp, &work_list, list) {
1864                                list_del_init(&work->list);
1865                                /* work allocated in the bh, freed here */
1866                                bnx2i_process_scsi_cmd_resp(work->session,
1867                                                            work->bnx2i_conn,
1868                                                            &work->cqe);
1869                                atomic_dec(&work->bnx2i_conn->work_cnt);
1870                                kfree(work);
1871                        }
1872                        spin_lock_bh(&p->p_work_lock);
1873                }
1874                set_current_state(TASK_INTERRUPTIBLE);
1875                spin_unlock_bh(&p->p_work_lock);
1876                schedule();
1877        }
1878        __set_current_state(TASK_RUNNING);
1879
1880        return 0;
1881}
1882
1883
1884/**
1885 * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread
1886 * @bnx2i_conn:         bnx2i connection
1887 *
1888 * this function is called by generic KCQ handler to queue all pending cmd
1889 * completion CQEs
1890 *
1891 * The implementation is to queue the cmd response based on the
1892 * last recorded command for the given connection.  The
1893 * cpu_id gets recorded upon task_xmit.  No out-of-order completion!
1894 */
1895static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session,
1896                                     struct bnx2i_conn *bnx2i_conn,
1897                                     struct bnx2i_nop_in_msg *cqe)
1898{
1899        struct bnx2i_work *bnx2i_work = NULL;
1900        struct bnx2i_percpu_s *p = NULL;
1901        struct iscsi_task *task;
1902        struct scsi_cmnd *sc;
1903        int rc = 0;
1904        int cpu;
1905
1906        spin_lock(&session->lock);
1907        task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data,
1908                                 cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1909        if (!task || !task->sc) {
1910                spin_unlock(&session->lock);
1911                return -EINVAL;
1912        }
1913        sc = task->sc;
1914
1915        if (!blk_rq_cpu_valid(sc->request))
1916                cpu = smp_processor_id();
1917        else
1918                cpu = sc->request->cpu;
1919
1920        spin_unlock(&session->lock);
1921
1922        p = &per_cpu(bnx2i_percpu, cpu);
1923        spin_lock(&p->p_work_lock);
1924        if (unlikely(!p->iothread)) {
1925                rc = -EINVAL;
1926                goto err;
1927        }
1928        /* Alloc and copy to the cqe */
1929        bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC);
1930        if (bnx2i_work) {
1931                INIT_LIST_HEAD(&bnx2i_work->list);
1932                bnx2i_work->session = session;
1933                bnx2i_work->bnx2i_conn = bnx2i_conn;
1934                memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe));
1935                list_add_tail(&bnx2i_work->list, &p->work_list);
1936                atomic_inc(&bnx2i_conn->work_cnt);
1937                wake_up_process(p->iothread);
1938                spin_unlock(&p->p_work_lock);
1939                goto done;
1940        } else
1941                rc = -ENOMEM;
1942err:
1943        spin_unlock(&p->p_work_lock);
1944        bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe);
1945done:
1946        return rc;
1947}
1948
1949
1950/**
1951 * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1952 * @bnx2i_conn:         bnx2i connection
1953 *
1954 * this function is called by generic KCQ handler to process all pending CQE's
1955 */
1956static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
1957{
1958        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1959        struct iscsi_session *session = conn->session;
1960        struct qp_info *qp;
1961        struct bnx2i_nop_in_msg *nopin;
1962        int tgt_async_msg;
1963        int cqe_cnt = 0;
1964
1965        if (bnx2i_conn->ep == NULL)
1966                return 0;
1967
1968        qp = &bnx2i_conn->ep->qp;
1969
1970        if (!qp->cq_virt) {
1971                printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!",
1972                        bnx2i_conn->hba->netdev->name);
1973                goto out;
1974        }
1975        while (1) {
1976                nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1977                if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1978                        break;
1979
1980                if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) {
1981                        if (nopin->op_code == ISCSI_OP_NOOP_IN &&
1982                            nopin->itt == (u16) RESERVED_ITT) {
1983                                printk(KERN_ALERT "bnx2i: Unsolicited "
1984                                        "NOP-In detected for suspended "
1985                                        "connection dev=%s!\n",
1986                                        bnx2i_conn->hba->netdev->name);
1987                                bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1988                                goto cqe_out;
1989                        }
1990                        break;
1991                }
1992                tgt_async_msg = 0;
1993
1994                switch (nopin->op_code) {
1995                case ISCSI_OP_SCSI_CMD_RSP:
1996                case ISCSI_OP_SCSI_DATA_IN:
1997                        /* Run the kthread engine only for data cmds
1998                           All other cmds will be completed in this bh! */
1999                        bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin);
2000                        break;
2001                case ISCSI_OP_LOGIN_RSP:
2002                        bnx2i_process_login_resp(session, bnx2i_conn,
2003                                                 qp->cq_cons_qe);
2004                        break;
2005                case ISCSI_OP_SCSI_TMFUNC_RSP:
2006                        bnx2i_process_tmf_resp(session, bnx2i_conn,
2007                                               qp->cq_cons_qe);
2008                        break;
2009                case ISCSI_OP_TEXT_RSP:
2010                        bnx2i_process_text_resp(session, bnx2i_conn,
2011                                                qp->cq_cons_qe);
2012                        break;
2013                case ISCSI_OP_LOGOUT_RSP:
2014                        bnx2i_process_logout_resp(session, bnx2i_conn,
2015                                                  qp->cq_cons_qe);
2016                        break;
2017                case ISCSI_OP_NOOP_IN:
2018                        if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
2019                                                     qp->cq_cons_qe))
2020                                tgt_async_msg = 1;
2021                        break;
2022                case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
2023                        bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
2024                                                       qp->cq_cons_qe);
2025                        break;
2026                case ISCSI_OP_ASYNC_EVENT:
2027                        bnx2i_process_async_mesg(session, bnx2i_conn,
2028                                                 qp->cq_cons_qe);
2029                        tgt_async_msg = 1;
2030                        break;
2031                case ISCSI_OP_REJECT:
2032                        bnx2i_process_reject_mesg(session, bnx2i_conn,
2033                                                  qp->cq_cons_qe);
2034                        break;
2035                case ISCSI_OPCODE_CLEANUP_RESPONSE:
2036                        bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
2037                                                       qp->cq_cons_qe);
2038                        break;
2039                default:
2040                        printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2041                                          nopin->op_code);
2042                }
2043                if (!tgt_async_msg) {
2044                        if (!atomic_read(&bnx2i_conn->ep->num_active_cmds))
2045                                printk(KERN_ALERT "bnx2i (%s): no active cmd! "
2046                                       "op 0x%x\n",
2047                                       bnx2i_conn->hba->netdev->name,
2048                                       nopin->op_code);
2049                        else
2050                                atomic_dec(&bnx2i_conn->ep->num_active_cmds);
2051                }
2052cqe_out:
2053                /* clear out in production version only, till beta keep opcode
2054                 * field intact, will be helpful in debugging (context dump)
2055                 * nopin->op_code = 0;
2056                 */
2057                cqe_cnt++;
2058                qp->cqe_exp_seq_sn++;
2059                if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
2060                        qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
2061
2062                if (qp->cq_cons_qe == qp->cq_last_qe) {
2063                        qp->cq_cons_qe = qp->cq_first_qe;
2064                        qp->cq_cons_idx = 0;
2065                } else {
2066                        qp->cq_cons_qe++;
2067                        qp->cq_cons_idx++;
2068                }
2069        }
2070out:
2071        return cqe_cnt;
2072}
2073
2074/**
2075 * bnx2i_fastpath_notification - process global event queue (KCQ)
2076 * @hba:                adapter structure pointer
2077 * @new_cqe_kcqe:       pointer to newly DMA'ed KCQE entry
2078 *
2079 * Fast path event notification handler, KCQ entry carries context id
2080 *      of the connection that has 1 or more pending CQ entries
2081 */
2082static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
2083                                        struct iscsi_kcqe *new_cqe_kcqe)
2084{
2085        struct bnx2i_conn *bnx2i_conn;
2086        u32 iscsi_cid;
2087        int nxt_idx;
2088
2089        iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
2090        bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2091
2092        if (!bnx2i_conn) {
2093                printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
2094                return;
2095        }
2096        if (!bnx2i_conn->ep) {
2097                printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
2098                return;
2099        }
2100
2101        bnx2i_process_new_cqes(bnx2i_conn);
2102        nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep,
2103                                                CNIC_ARM_CQE_FP);
2104        if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn))
2105                bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP);
2106}
2107
2108
2109/**
2110 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
2111 * @hba:                adapter structure pointer
2112 * @update_kcqe:        kcqe pointer
2113 *
2114 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
2115 */
2116static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
2117                                           struct iscsi_kcqe *update_kcqe)
2118{
2119        struct bnx2i_conn *conn;
2120        u32 iscsi_cid;
2121
2122        iscsi_cid = update_kcqe->iscsi_conn_id;
2123        conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2124
2125        if (!conn) {
2126                printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
2127                return;
2128        }
2129        if (!conn->ep) {
2130                printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
2131                return;
2132        }
2133
2134        if (update_kcqe->completion_status) {
2135                printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
2136                conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
2137        } else
2138                conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
2139
2140        wake_up_interruptible(&conn->ep->ofld_wait);
2141}
2142
2143
2144/**
2145 * bnx2i_recovery_que_add_conn - add connection to recovery queue
2146 * @hba:                adapter structure pointer
2147 * @bnx2i_conn:         iscsi connection
2148 *
2149 * Add connection to recovery queue and schedule adapter eh worker
2150 */
2151static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
2152                                        struct bnx2i_conn *bnx2i_conn)
2153{
2154        iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
2155                           ISCSI_ERR_CONN_FAILED);
2156}
2157
2158
2159/**
2160 * bnx2i_process_tcp_error - process error notification on a given connection
2161 *
2162 * @hba:                adapter structure pointer
2163 * @tcp_err:            tcp error kcqe pointer
2164 *
2165 * handles tcp level error notifications from FW.
2166 */
2167static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
2168                                    struct iscsi_kcqe *tcp_err)
2169{
2170        struct bnx2i_conn *bnx2i_conn;
2171        u32 iscsi_cid;
2172
2173        iscsi_cid = tcp_err->iscsi_conn_id;
2174        bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2175
2176        if (!bnx2i_conn) {
2177                printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2178                return;
2179        }
2180
2181        printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
2182                          iscsi_cid, tcp_err->completion_status);
2183        bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2184}
2185
2186
2187/**
2188 * bnx2i_process_iscsi_error - process error notification on a given connection
2189 * @hba:                adapter structure pointer
2190 * @iscsi_err:          iscsi error kcqe pointer
2191 *
2192 * handles iscsi error notifications from the FW. Firmware based in initial
2193 *      handshake classifies iscsi protocol / TCP rfc violation into either
2194 *      warning or error indications. If indication is of "Error" type, driver
2195 *      will initiate session recovery for that connection/session. For
2196 *      "Warning" type indication, driver will put out a system log message
2197 *      (there will be only one message for each type for the life of the
2198 *      session, this is to avoid un-necessarily overloading the system)
2199 */
2200static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
2201                                      struct iscsi_kcqe *iscsi_err)
2202{
2203        struct bnx2i_conn *bnx2i_conn;
2204        u32 iscsi_cid;
2205        char warn_notice[] = "iscsi_warning";
2206        char error_notice[] = "iscsi_error";
2207        char additional_notice[64];
2208        char *message;
2209        int need_recovery;
2210        u64 err_mask64;
2211
2212        iscsi_cid = iscsi_err->iscsi_conn_id;
2213        bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2214        if (!bnx2i_conn) {
2215                printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2216                return;
2217        }
2218
2219        err_mask64 = (0x1ULL << iscsi_err->completion_status);
2220
2221        if (err_mask64 & iscsi_error_mask) {
2222                need_recovery = 0;
2223                message = warn_notice;
2224        } else {
2225                need_recovery = 1;
2226                message = error_notice;
2227        }
2228
2229        switch (iscsi_err->completion_status) {
2230        case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
2231                strcpy(additional_notice, "hdr digest err");
2232                break;
2233        case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
2234                strcpy(additional_notice, "data digest err");
2235                break;
2236        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
2237                strcpy(additional_notice, "wrong opcode rcvd");
2238                break;
2239        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
2240                strcpy(additional_notice, "AHS len > 0 rcvd");
2241                break;
2242        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
2243                strcpy(additional_notice, "invalid ITT rcvd");
2244                break;
2245        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
2246                strcpy(additional_notice, "wrong StatSN rcvd");
2247                break;
2248        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
2249                strcpy(additional_notice, "wrong DataSN rcvd");
2250                break;
2251        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
2252                strcpy(additional_notice, "pend R2T violation");
2253                break;
2254        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
2255                strcpy(additional_notice, "ERL0, UO");
2256                break;
2257        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
2258                strcpy(additional_notice, "ERL0, U1");
2259                break;
2260        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
2261                strcpy(additional_notice, "ERL0, U2");
2262                break;
2263        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
2264                strcpy(additional_notice, "ERL0, U3");
2265                break;
2266        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
2267                strcpy(additional_notice, "ERL0, U4");
2268                break;
2269        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
2270                strcpy(additional_notice, "ERL0, U5");
2271                break;
2272        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
2273                strcpy(additional_notice, "ERL0, U6");
2274                break;
2275        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
2276                strcpy(additional_notice, "invalid resi len");
2277                break;
2278        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
2279                strcpy(additional_notice, "MRDSL violation");
2280                break;
2281        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
2282                strcpy(additional_notice, "F-bit not set");
2283                break;
2284        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
2285                strcpy(additional_notice, "invalid TTT");
2286                break;
2287        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
2288                strcpy(additional_notice, "invalid DataSN");
2289                break;
2290        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2291                strcpy(additional_notice, "burst len violation");
2292                break;
2293        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2294                strcpy(additional_notice, "buf offset violation");
2295                break;
2296        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2297                strcpy(additional_notice, "invalid LUN field");
2298                break;
2299        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2300                strcpy(additional_notice, "invalid R2TSN field");
2301                break;
2302#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0       \
2303        ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2304        case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2305                strcpy(additional_notice, "invalid cmd len1");
2306                break;
2307#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1       \
2308        ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2309        case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2310                strcpy(additional_notice, "invalid cmd len2");
2311                break;
2312        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2313                strcpy(additional_notice,
2314                       "pend r2t exceeds MaxOutstandingR2T value");
2315                break;
2316        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2317                strcpy(additional_notice, "TTT is rsvd");
2318                break;
2319        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2320                strcpy(additional_notice, "MBL violation");
2321                break;
2322#define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO         \
2323        ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2324        case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2325                strcpy(additional_notice, "data seg len != 0");
2326                break;
2327        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2328                strcpy(additional_notice, "reject pdu len error");
2329                break;
2330        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2331                strcpy(additional_notice, "async pdu len error");
2332                break;
2333        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2334                strcpy(additional_notice, "nopin pdu len error");
2335                break;
2336#define BNX2_ERR_PEND_R2T_IN_CLEANUP                    \
2337        ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2338        case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2339                strcpy(additional_notice, "pend r2t in cleanup");
2340                break;
2341
2342        case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2343                strcpy(additional_notice, "IP fragments rcvd");
2344                break;
2345        case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2346                strcpy(additional_notice, "IP options error");
2347                break;
2348        case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2349                strcpy(additional_notice, "urgent flag error");
2350                break;
2351        default:
2352                printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2353                                  iscsi_err->completion_status);
2354        }
2355
2356        if (need_recovery) {
2357                iscsi_conn_printk(KERN_ALERT,
2358                                  bnx2i_conn->cls_conn->dd_data,
2359                                  "bnx2i: %s - %s\n",
2360                                  message, additional_notice);
2361
2362                iscsi_conn_printk(KERN_ALERT,
2363                                  bnx2i_conn->cls_conn->dd_data,
2364                                  "conn_err - hostno %d conn %p, "
2365                                  "iscsi_cid %x cid %x\n",
2366                                  bnx2i_conn->hba->shost->host_no,
2367                                  bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2368                                  bnx2i_conn->ep->ep_cid);
2369                bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2370        } else
2371                if (!test_and_set_bit(iscsi_err->completion_status,
2372                                      (void *) &bnx2i_conn->violation_notified))
2373                        iscsi_conn_printk(KERN_ALERT,
2374                                          bnx2i_conn->cls_conn->dd_data,
2375                                          "bnx2i: %s - %s\n",
2376                                          message, additional_notice);
2377}
2378
2379
2380/**
2381 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2382 * @hba:                adapter structure pointer
2383 * @conn_destroy:       conn destroy kcqe pointer
2384 *
2385 * handles connection destroy completion request.
2386 */
2387static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2388                                            struct iscsi_kcqe *conn_destroy)
2389{
2390        struct bnx2i_endpoint *ep;
2391
2392        ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2393        if (!ep) {
2394                printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2395                                  "offload request, unexpected complection\n");
2396                return;
2397        }
2398
2399        if (hba != ep->hba) {
2400                printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2401                return;
2402        }
2403
2404        if (conn_destroy->completion_status) {
2405                printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2406                ep->state = EP_STATE_CLEANUP_FAILED;
2407        } else
2408                ep->state = EP_STATE_CLEANUP_CMPL;
2409        wake_up_interruptible(&ep->ofld_wait);
2410}
2411
2412
2413/**
2414 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2415 * @hba:                adapter structure pointer
2416 * @ofld_kcqe:          conn offload kcqe pointer
2417 *
2418 * handles initial connection offload completion, ep_connect() thread is
2419 *      woken-up to continue with LLP connect process
2420 */
2421static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2422                                    struct iscsi_kcqe *ofld_kcqe)
2423{
2424        u32 cid_addr;
2425        struct bnx2i_endpoint *ep;
2426        u32 cid_num;
2427
2428        ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2429        if (!ep) {
2430                printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2431                return;
2432        }
2433
2434        if (hba != ep->hba) {
2435                printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2436                return;
2437        }
2438
2439        if (ofld_kcqe->completion_status) {
2440                ep->state = EP_STATE_OFLD_FAILED;
2441                if (ofld_kcqe->completion_status ==
2442                    ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2443                        printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable "
2444                                "to allocate iSCSI context resources\n",
2445                                hba->netdev->name);
2446                else if (ofld_kcqe->completion_status ==
2447                         ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE)
2448                        printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2449                                "opcode\n", hba->netdev->name);
2450                else if (ofld_kcqe->completion_status ==
2451                         ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY)
2452                        /* error status code valid only for 5771x chipset */
2453                        ep->state = EP_STATE_OFLD_FAILED_CID_BUSY;
2454                else
2455                        printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2456                                "error code %d\n", hba->netdev->name,
2457                                ofld_kcqe->completion_status);
2458        } else {
2459                ep->state = EP_STATE_OFLD_COMPL;
2460                cid_addr = ofld_kcqe->iscsi_conn_context_id;
2461                cid_num = bnx2i_get_cid_num(ep);
2462                ep->ep_cid = cid_addr;
2463                ep->qp.ctx_base = NULL;
2464        }
2465        wake_up_interruptible(&ep->ofld_wait);
2466}
2467
2468/**
2469 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2470 * @hba:                adapter structure pointer
2471 * @update_kcqe:        kcqe pointer
2472 *
2473 * Generic KCQ event handler/dispatcher
2474 */
2475static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2476                                u32 num_cqe)
2477{
2478        struct bnx2i_hba *hba = context;
2479        int i = 0;
2480        struct iscsi_kcqe *ikcqe = NULL;
2481
2482        while (i < num_cqe) {
2483                ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2484
2485                if (ikcqe->op_code ==
2486                    ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2487                        bnx2i_fastpath_notification(hba, ikcqe);
2488                else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2489                        bnx2i_process_ofld_cmpl(hba, ikcqe);
2490                else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2491                        bnx2i_process_update_conn_cmpl(hba, ikcqe);
2492                else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2493                        if (ikcqe->completion_status !=
2494                            ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2495                                bnx2i_iscsi_license_error(hba, ikcqe->\
2496                                                          completion_status);
2497                        else {
2498                                set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2499                                bnx2i_get_link_state(hba);
2500                                printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2501                                                 "ISCSI_INIT passed\n",
2502                                                 (u8)hba->pcidev->bus->number,
2503                                                 hba->pci_devno,
2504                                                 (u8)hba->pci_func);
2505
2506
2507                        }
2508                } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2509                        bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2510                else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2511                        bnx2i_process_iscsi_error(hba, ikcqe);
2512                else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2513                        bnx2i_process_tcp_error(hba, ikcqe);
2514                else
2515                        printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2516                                          ikcqe->op_code);
2517        }
2518}
2519
2520
2521/**
2522 * bnx2i_indicate_netevent - Generic netdev event handler
2523 * @context:    adapter structure pointer
2524 * @event:      event type
2525 * @vlan_id:    vlans id - associated vlan id with this event
2526 *
2527 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2528 *      NETDEV_GOING_DOWN and NETDEV_CHANGE
2529 */
2530static void bnx2i_indicate_netevent(void *context, unsigned long event,
2531                                    u16 vlan_id)
2532{
2533        struct bnx2i_hba *hba = context;
2534
2535        /* Ignore all netevent coming from vlans */
2536        if (vlan_id != 0)
2537                return;
2538
2539        switch (event) {
2540        case NETDEV_UP:
2541                if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2542                        bnx2i_send_fw_iscsi_init_msg(hba);
2543                break;
2544        case NETDEV_DOWN:
2545                clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2546                clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2547                break;
2548        case NETDEV_GOING_DOWN:
2549                set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2550                iscsi_host_for_each_session(hba->shost,
2551                                            bnx2i_drop_session);
2552                break;
2553        case NETDEV_CHANGE:
2554                bnx2i_get_link_state(hba);
2555                break;
2556        default:
2557                ;
2558        }
2559}
2560
2561
2562/**
2563 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2564 * @cm_sk:              cnic sock structure pointer
2565 *
2566 * function callback exported via bnx2i - cnic driver interface to
2567 *      indicate completion of option-2 TCP connect request.
2568 */
2569static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2570{
2571        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2572
2573        if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2574                ep->state = EP_STATE_CONNECT_FAILED;
2575        else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2576                ep->state = EP_STATE_CONNECT_COMPL;
2577        else
2578                ep->state = EP_STATE_CONNECT_FAILED;
2579
2580        wake_up_interruptible(&ep->ofld_wait);
2581}
2582
2583
2584/**
2585 * bnx2i_cm_close_cmpl - process tcp conn close completion
2586 * @cm_sk:      cnic sock structure pointer
2587 *
2588 * function callback exported via bnx2i - cnic driver interface to
2589 *      indicate completion of option-2 graceful TCP connect shutdown
2590 */
2591static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2592{
2593        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2594
2595        ep->state = EP_STATE_DISCONN_COMPL;
2596        wake_up_interruptible(&ep->ofld_wait);
2597}
2598
2599
2600/**
2601 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2602 * @cm_sk:      cnic sock structure pointer
2603 *
2604 * function callback exported via bnx2i - cnic driver interface to
2605 *      indicate completion of option-2 abortive TCP connect termination
2606 */
2607static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2608{
2609        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2610
2611        ep->state = EP_STATE_DISCONN_COMPL;
2612        wake_up_interruptible(&ep->ofld_wait);
2613}
2614
2615
2616/**
2617 * bnx2i_cm_remote_close - process received TCP FIN
2618 * @hba:                adapter structure pointer
2619 * @update_kcqe:        kcqe pointer
2620 *
2621 * function callback exported via bnx2i - cnic driver interface to indicate
2622 *      async TCP events such as FIN
2623 */
2624static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2625{
2626        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2627
2628        ep->state = EP_STATE_TCP_FIN_RCVD;
2629        if (ep->conn)
2630                bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2631}
2632
2633/**
2634 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2635 * @hba:                adapter structure pointer
2636 * @update_kcqe:        kcqe pointer
2637 *
2638 * function callback exported via bnx2i - cnic driver interface to
2639 *      indicate async TCP events (RST) sent by the peer.
2640 */
2641static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2642{
2643        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2644        u32 old_state = ep->state;
2645
2646        ep->state = EP_STATE_TCP_RST_RCVD;
2647        if (old_state == EP_STATE_DISCONN_START)
2648                wake_up_interruptible(&ep->ofld_wait);
2649        else
2650                if (ep->conn)
2651                        bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2652}
2653
2654
2655static int bnx2i_send_nl_mesg(void *context, u32 msg_type,
2656                              char *buf, u16 buflen)
2657{
2658        struct bnx2i_hba *hba = context;
2659        int rc;
2660
2661        if (!hba)
2662                return -ENODEV;
2663
2664        rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2665                                msg_type, buf, buflen);
2666        if (rc)
2667                printk(KERN_ALERT "bnx2i: private nl message send error\n");
2668
2669        return rc;
2670}
2671
2672
2673/**
2674 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2675 *                      carrying callback function pointers
2676 *
2677 */
2678struct cnic_ulp_ops bnx2i_cnic_cb = {
2679        .cnic_init = bnx2i_ulp_init,
2680        .cnic_exit = bnx2i_ulp_exit,
2681        .cnic_start = bnx2i_start,
2682        .cnic_stop = bnx2i_stop,
2683        .indicate_kcqes = bnx2i_indicate_kcqe,
2684        .indicate_netevent = bnx2i_indicate_netevent,
2685        .cm_connect_complete = bnx2i_cm_connect_cmpl,
2686        .cm_close_complete = bnx2i_cm_close_cmpl,
2687        .cm_abort_complete = bnx2i_cm_abort_cmpl,
2688        .cm_remote_close = bnx2i_cm_remote_close,
2689        .cm_remote_abort = bnx2i_cm_remote_abort,
2690        .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2691        .owner = THIS_MODULE
2692};
2693
2694
2695/**
2696 * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2697 * @ep: bnx2i endpoint
2698 *
2699 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2700 *      register in BAR #0. Whereas in 57710 these register are accessed by
2701 *      mapping BAR #1
2702 */
2703int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2704{
2705        u32 cid_num;
2706        u32 reg_off;
2707        u32 first_l4l5;
2708        u32 ctx_sz;
2709        u32 config2;
2710        resource_size_t reg_base;
2711
2712        cid_num = bnx2i_get_cid_num(ep);
2713
2714        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2715                reg_base = pci_resource_start(ep->hba->pcidev,
2716                                              BNX2X_DOORBELL_PCI_BAR);
2717                reg_off = BNX2I_5771X_DBELL_PAGE_SIZE * (cid_num & 0x1FFFF) +
2718                          DPM_TRIGER_TYPE;
2719                ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
2720                goto arm_cq;
2721        }
2722
2723        reg_base = ep->hba->netdev->base_addr;
2724        if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2725            (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2726                config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2727                first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2728                ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2729                if (ctx_sz)
2730                        reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2731                                  + BNX2I_570X_PAGE_SIZE_DEFAULT *
2732                                  (((cid_num - first_l4l5) / ctx_sz) + 256);
2733                else
2734                        reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2735        } else
2736                /* 5709 device in normal node and 5706/5708 devices */
2737                reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2738
2739        ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off,
2740                                          MB_KERNEL_CTX_SIZE);
2741        if (!ep->qp.ctx_base)
2742                return -ENOMEM;
2743
2744arm_cq:
2745        bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2746        return 0;
2747}
2748
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.