linux/drivers/scsi/bnx2i/bnx2i_hwi.c
<<
>>
Prefs
   1/* bnx2i_hwi.c: Broadcom NetXtreme II iSCSI driver.
   2 *
   3 * Copyright (c) 2006 - 2009 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 */
  13
  14#include <scsi/scsi_tcq.h>
  15#include <scsi/libiscsi.h>
  16#include "bnx2i.h"
  17
  18/**
  19 * bnx2i_get_cid_num - get cid from ep
  20 * @ep:         endpoint pointer
  21 *
  22 * Only applicable to 57710 family of devices
  23 */
  24static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
  25{
  26        u32 cid;
  27
  28        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
  29                cid = ep->ep_cid;
  30        else
  31                cid = GET_CID_NUM(ep->ep_cid);
  32        return cid;
  33}
  34
  35
  36/**
  37 * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
  38 * @hba:                Adapter for which adjustments is to be made
  39 *
  40 * Only applicable to 57710 family of devices
  41 */
  42static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
  43{
  44        u32 num_elements_per_pg;
  45
  46        if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
  47            test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
  48            test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
  49                if (!is_power_of_2(hba->max_sqes))
  50                        hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);
  51
  52                if (!is_power_of_2(hba->max_rqes))
  53                        hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
  54        }
  55
  56        /* Adjust each queue size if the user selection does not
  57         * yield integral num of page buffers
  58         */
  59        /* adjust SQ */
  60        num_elements_per_pg = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
  61        if (hba->max_sqes < num_elements_per_pg)
  62                hba->max_sqes = num_elements_per_pg;
  63        else if (hba->max_sqes % num_elements_per_pg)
  64                hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
  65                                 ~(num_elements_per_pg - 1);
  66
  67        /* adjust CQ */
  68        num_elements_per_pg = PAGE_SIZE / BNX2I_CQE_SIZE;
  69        if (hba->max_cqes < num_elements_per_pg)
  70                hba->max_cqes = num_elements_per_pg;
  71        else if (hba->max_cqes % num_elements_per_pg)
  72                hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
  73                                 ~(num_elements_per_pg - 1);
  74
  75        /* adjust RQ */
  76        num_elements_per_pg = PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
  77        if (hba->max_rqes < num_elements_per_pg)
  78                hba->max_rqes = num_elements_per_pg;
  79        else if (hba->max_rqes % num_elements_per_pg)
  80                hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
  81                                 ~(num_elements_per_pg - 1);
  82}
  83
  84
  85/**
  86 * bnx2i_get_link_state - get network interface link state
  87 * @hba:        adapter instance pointer
  88 *
  89 * updates adapter structure flag based on netdev state
  90 */
  91static void bnx2i_get_link_state(struct bnx2i_hba *hba)
  92{
  93        if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
  94                set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
  95        else
  96                clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
  97}
  98
  99
 100/**
 101 * bnx2i_iscsi_license_error - displays iscsi license related error message
 102 * @hba:                adapter instance pointer
 103 * @error_code:         error classification
 104 *
 105 * Puts out an error log when driver is unable to offload iscsi connection
 106 *      due to license restrictions
 107 */
 108static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
 109{
 110        if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
 111                /* iSCSI offload not supported on this device */
 112                printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
 113                                hba->netdev->name);
 114        if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
 115                /* iSCSI offload not supported on this LOM device */
 116                printk(KERN_ERR "bnx2i: LOM is not enable to "
 117                                "offload iSCSI connections, dev=%s\n",
 118                                hba->netdev->name);
 119        set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
 120}
 121
 122
 123/**
 124 * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
 125 * @ep:         endpoint (transport indentifier) structure
 126 * @action:     action, ARM or DISARM. For now only ARM_CQE is used
 127 *
 128 * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
 129 *      the driver. EQ event is generated CQ index is hit or at least 1 CQ is
 130 *      outstanding and on chip timer expires
 131 */
 132void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
 133{
 134        struct bnx2i_5771x_cq_db *cq_db;
 135        u16 cq_index;
 136
 137        if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 138                return;
 139
 140        if (action == CNIC_ARM_CQE) {
 141                cq_index = ep->qp.cqe_exp_seq_sn +
 142                           ep->num_active_cmds / event_coal_div;
 143                cq_index %= (ep->qp.cqe_size * 2 + 1);
 144                if (!cq_index) {
 145                        cq_index = 1;
 146                        cq_db = (struct bnx2i_5771x_cq_db *)
 147                                        ep->qp.cq_pgtbl_virt;
 148                        cq_db->sqn[0] = cq_index;
 149                }
 150        }
 151}
 152
 153
 154/**
 155 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
 156 * @conn:               iscsi connection on which RQ event occured
 157 * @ptr:                driver buffer to which RQ buffer contents is to
 158 *                      be copied
 159 * @len:                length of valid data inside RQ buf
 160 *
 161 * Copies RQ buffer contents from shared (DMA'able) memory region to
 162 *      driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
 163 *      scsi sense info
 164 */
 165void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
 166{
 167        if (!bnx2i_conn->ep->qp.rqe_left)
 168                return;
 169
 170        bnx2i_conn->ep->qp.rqe_left--;
 171        memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
 172        if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
 173                bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
 174                bnx2i_conn->ep->qp.rq_cons_idx = 0;
 175        } else {
 176                bnx2i_conn->ep->qp.rq_cons_qe++;
 177                bnx2i_conn->ep->qp.rq_cons_idx++;
 178        }
 179}
 180
 181
 182static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
 183{
 184        struct bnx2i_5771x_dbell dbell;
 185        u32 msg;
 186
 187        memset(&dbell, 0, sizeof(dbell));
 188        dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
 189                              B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
 190        msg = *((u32 *)&dbell);
 191        /* TODO : get doorbell register mapping */
 192        writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
 193}
 194
 195
 196/**
 197 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
 198 * @conn:       iscsi connection on which event to post
 199 * @count:      number of RQ buffer being posted to chip
 200 *
 201 * No need to ring hardware doorbell for 57710 family of devices
 202 */
 203void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
 204{
 205        struct bnx2i_5771x_sq_rq_db *rq_db;
 206        u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
 207        struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 208
 209        ep->qp.rqe_left += count;
 210        ep->qp.rq_prod_idx &= 0x7FFF;
 211        ep->qp.rq_prod_idx += count;
 212
 213        if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
 214                ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
 215                if (!hi_bit)
 216                        ep->qp.rq_prod_idx |= 0x8000;
 217        } else
 218                ep->qp.rq_prod_idx |= hi_bit;
 219
 220        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 221                rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
 222                rq_db->prod_idx = ep->qp.rq_prod_idx;
 223                /* no need to ring hardware doorbell for 57710 */
 224        } else {
 225                writew(ep->qp.rq_prod_idx,
 226                       ep->qp.ctx_base + CNIC_RECV_DOORBELL);
 227        }
 228        mmiowb();
 229}
 230
 231
 232/**
 233 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
 234 * @conn:               iscsi connection to which new SQ entries belong
 235 * @count:              number of SQ WQEs to post
 236 *
 237 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
 238 *      of devices. For 5706/5708/5709 new SQ WQE count is written into the
 239 *      doorbell register
 240 */
 241static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
 242{
 243        struct bnx2i_5771x_sq_rq_db *sq_db;
 244        struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 245
 246        ep->num_active_cmds++;
 247        wmb();  /* flush SQ WQE memory before the doorbell is rung */
 248        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 249                sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
 250                sq_db->prod_idx = ep->qp.sq_prod_idx;
 251                bnx2i_ring_577xx_doorbell(bnx2i_conn);
 252        } else
 253                writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
 254
 255        mmiowb(); /* flush posted PCI writes */
 256}
 257
 258
 259/**
 260 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
 261 * @conn:       iscsi connection to which new SQ entries belong
 262 * @count:      number of SQ WQEs to post
 263 *
 264 * this routine will update SQ driver parameters and ring the doorbell
 265 */
 266static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
 267                                              int count)
 268{
 269        int tmp_cnt;
 270
 271        if (count == 1) {
 272                if (bnx2i_conn->ep->qp.sq_prod_qe ==
 273                    bnx2i_conn->ep->qp.sq_last_qe)
 274                        bnx2i_conn->ep->qp.sq_prod_qe =
 275                                                bnx2i_conn->ep->qp.sq_first_qe;
 276                else
 277                        bnx2i_conn->ep->qp.sq_prod_qe++;
 278        } else {
 279                if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
 280                    bnx2i_conn->ep->qp.sq_last_qe)
 281                        bnx2i_conn->ep->qp.sq_prod_qe += count;
 282                else {
 283                        tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
 284                                bnx2i_conn->ep->qp.sq_prod_qe;
 285                        bnx2i_conn->ep->qp.sq_prod_qe =
 286                                &bnx2i_conn->ep->qp.sq_first_qe[count -
 287                                                                (tmp_cnt + 1)];
 288                }
 289        }
 290        bnx2i_conn->ep->qp.sq_prod_idx += count;
 291        /* Ring the doorbell */
 292        bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
 293}
 294
 295
 296/**
 297 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
 298 * @conn:       iscsi connection
 299 * @cmd:        driver command structure which is requesting
 300 *              a WQE to sent to chip for further processing
 301 *
 302 * prepare and post an iSCSI Login request WQE to CNIC firmware
 303 */
 304int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
 305                           struct iscsi_task *task)
 306{
 307        struct bnx2i_cmd *bnx2i_cmd;
 308        struct bnx2i_login_request *login_wqe;
 309        struct iscsi_login *login_hdr;
 310        u32 dword;
 311
 312        bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 313        login_hdr = (struct iscsi_login *)task->hdr;
 314        login_wqe = (struct bnx2i_login_request *)
 315                                                bnx2i_conn->ep->qp.sq_prod_qe;
 316
 317        login_wqe->op_code = login_hdr->opcode;
 318        login_wqe->op_attr = login_hdr->flags;
 319        login_wqe->version_max = login_hdr->max_version;
 320        login_wqe->version_min = login_hdr->min_version;
 321        login_wqe->data_length = ntoh24(login_hdr->dlength);
 322        login_wqe->isid_lo = *((u32 *) login_hdr->isid);
 323        login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
 324        login_wqe->tsih = login_hdr->tsih;
 325        login_wqe->itt = task->itt |
 326                (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
 327        login_wqe->cid = login_hdr->cid;
 328
 329        login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
 330        login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
 331
 332        login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
 333        login_wqe->resp_bd_list_addr_hi =
 334                (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
 335
 336        dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
 337                 (bnx2i_conn->gen_pdu.resp_buf_size <<
 338                  ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
 339        login_wqe->resp_buffer = dword;
 340        login_wqe->flags = 0;
 341        login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
 342        login_wqe->bd_list_addr_hi =
 343                (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
 344        login_wqe->num_bds = 1;
 345        login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 346
 347        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 348        return 0;
 349}
 350
 351/**
 352 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
 353 * @conn:       iscsi connection
 354 * @mtask:      driver command structure which is requesting
 355 *              a WQE to sent to chip for further processing
 356 *
 357 * prepare and post an iSCSI Login request WQE to CNIC firmware
 358 */
 359int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
 360                         struct iscsi_task *mtask)
 361{
 362        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
 363        struct iscsi_tm *tmfabort_hdr;
 364        struct scsi_cmnd *ref_sc;
 365        struct iscsi_task *ctask;
 366        struct bnx2i_cmd *bnx2i_cmd;
 367        struct bnx2i_tmf_request *tmfabort_wqe;
 368        u32 dword;
 369
 370        bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
 371        tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
 372        tmfabort_wqe = (struct bnx2i_tmf_request *)
 373                                                bnx2i_conn->ep->qp.sq_prod_qe;
 374
 375        tmfabort_wqe->op_code = tmfabort_hdr->opcode;
 376        tmfabort_wqe->op_attr = 0;
 377        tmfabort_wqe->op_attr =
 378                ISCSI_TMF_REQUEST_ALWAYS_ONE | ISCSI_TM_FUNC_ABORT_TASK;
 379        tmfabort_wqe->lun[0] = be32_to_cpu(tmfabort_hdr->lun[0]);
 380        tmfabort_wqe->lun[1] = be32_to_cpu(tmfabort_hdr->lun[1]);
 381
 382        tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
 383        tmfabort_wqe->reserved2 = 0;
 384        tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
 385
 386        ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
 387        if (!ctask || ctask->sc)
 388                /*
 389                 * the iscsi layer must have completed the cmd while this
 390                 * was starting up.
 391                 */
 392                return 0;
 393        ref_sc = ctask->sc;
 394
 395        if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
 396                dword = (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
 397        else
 398                dword = (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
 399        tmfabort_wqe->ref_itt = (dword | tmfabort_hdr->rtt);
 400        tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
 401
 402        tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
 403        tmfabort_wqe->bd_list_addr_hi = (u32)
 404                                ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 405        tmfabort_wqe->num_bds = 1;
 406        tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 407
 408        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 409        return 0;
 410}
 411
 412/**
 413 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
 414 * @conn:       iscsi connection
 415 * @cmd:        driver command structure which is requesting
 416 *              a WQE to sent to chip for further processing
 417 *
 418 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
 419 */
 420int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
 421                             struct bnx2i_cmd *cmd)
 422{
 423        struct bnx2i_cmd_request *scsi_cmd_wqe;
 424
 425        scsi_cmd_wqe = (struct bnx2i_cmd_request *)
 426                                                bnx2i_conn->ep->qp.sq_prod_qe;
 427        memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
 428        scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 429
 430        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 431        return 0;
 432}
 433
 434/**
 435 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
 436 * @conn:               iscsi connection
 437 * @cmd:                driver command structure which is requesting
 438 *                      a WQE to sent to chip for further processing
 439 * @ttt:                TTT to be used when building pdu header
 440 * @datap:              payload buffer pointer
 441 * @data_len:           payload data length
 442 * @unsol:              indicated whether nopout pdu is unsolicited pdu or
 443 *                      in response to target's NOPIN w/ TTT != FFFFFFFF
 444 *
 445 * prepare and post a nopout request WQE to CNIC firmware
 446 */
 447int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
 448                            struct iscsi_task *task, u32 ttt,
 449                            char *datap, int data_len, int unsol)
 450{
 451        struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 452        struct bnx2i_cmd *bnx2i_cmd;
 453        struct bnx2i_nop_out_request *nopout_wqe;
 454        struct iscsi_nopout *nopout_hdr;
 455
 456        bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 457        nopout_hdr = (struct iscsi_nopout *)task->hdr;
 458        nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
 459        nopout_wqe->op_code = nopout_hdr->opcode;
 460        nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
 461        memcpy(nopout_wqe->lun, nopout_hdr->lun, 8);
 462
 463        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 464                u32 tmp = nopout_hdr->lun[0];
 465                /* 57710 requires LUN field to be swapped */
 466                nopout_hdr->lun[0] = nopout_hdr->lun[1];
 467                nopout_hdr->lun[1] = tmp;
 468        }
 469
 470        nopout_wqe->itt = ((u16)task->itt |
 471                           (ISCSI_TASK_TYPE_MPATH <<
 472                            ISCSI_TMF_REQUEST_TYPE_SHIFT));
 473        nopout_wqe->ttt = ttt;
 474        nopout_wqe->flags = 0;
 475        if (!unsol)
 476                nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
 477        else if (nopout_hdr->itt == RESERVED_ITT)
 478                nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
 479
 480        nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
 481        nopout_wqe->data_length = data_len;
 482        if (data_len) {
 483                /* handle payload data, not required in first release */
 484                printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
 485        } else {
 486                nopout_wqe->bd_list_addr_lo = (u32)
 487                                        bnx2i_conn->hba->mp_bd_dma;
 488                nopout_wqe->bd_list_addr_hi =
 489                        (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 490                nopout_wqe->num_bds = 1;
 491        }
 492        nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 493
 494        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 495        return 0;
 496}
 497
 498
 499/**
 500 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
 501 * @conn:       iscsi connection
 502 * @cmd:        driver command structure which is requesting
 503 *              a WQE to sent to chip for further processing
 504 *
 505 * prepare and post logout request WQE to CNIC firmware
 506 */
 507int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
 508                            struct iscsi_task *task)
 509{
 510        struct bnx2i_cmd *bnx2i_cmd;
 511        struct bnx2i_logout_request *logout_wqe;
 512        struct iscsi_logout *logout_hdr;
 513
 514        bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 515        logout_hdr = (struct iscsi_logout *)task->hdr;
 516
 517        logout_wqe = (struct bnx2i_logout_request *)
 518                                                bnx2i_conn->ep->qp.sq_prod_qe;
 519        memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
 520
 521        logout_wqe->op_code = logout_hdr->opcode;
 522        logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
 523        logout_wqe->op_attr =
 524                        logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
 525        logout_wqe->itt = ((u16)task->itt |
 526                           (ISCSI_TASK_TYPE_MPATH <<
 527                            ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
 528        logout_wqe->data_length = 0;
 529        logout_wqe->cid = 0;
 530
 531        logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
 532        logout_wqe->bd_list_addr_hi = (u32)
 533                                ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 534        logout_wqe->num_bds = 1;
 535        logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 536
 537        bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 538        return 0;
 539}
 540
 541
 542/**
 543 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
 544 * @conn:       iscsi connection which requires iscsi parameter update
 545 *
 546 * sends down iSCSI Conn Update request to move iSCSI conn to FFP
 547 */
 548void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
 549{
 550        struct bnx2i_conn *bnx2i_conn = conn->dd_data;
 551        struct bnx2i_hba *hba = bnx2i_conn->hba;
 552        struct kwqe *kwqe_arr[2];
 553        struct iscsi_kwqe_conn_update *update_wqe;
 554        struct iscsi_kwqe_conn_update conn_update_kwqe;
 555
 556        update_wqe = &conn_update_kwqe;
 557
 558        update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
 559        update_wqe->hdr.flags =
 560                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 561
 562        /* 5771x requires conn context id to be passed as is */
 563        if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
 564                update_wqe->context_id = bnx2i_conn->ep->ep_cid;
 565        else
 566                update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
 567        update_wqe->conn_flags = 0;
 568        if (conn->hdrdgst_en)
 569                update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
 570        if (conn->datadgst_en)
 571                update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
 572        if (conn->session->initial_r2t_en)
 573                update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
 574        if (conn->session->imm_data_en)
 575                update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
 576
 577        update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
 578        update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
 579        update_wqe->first_burst_length = conn->session->first_burst;
 580        update_wqe->max_burst_length = conn->session->max_burst;
 581        update_wqe->exp_stat_sn = conn->exp_statsn;
 582        update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
 583        update_wqe->session_error_recovery_level = conn->session->erl;
 584        iscsi_conn_printk(KERN_ALERT, conn,
 585                          "bnx2i: conn update - MBL 0x%x FBL 0x%x"
 586                          "MRDSL_I 0x%x MRDSL_T 0x%x \n",
 587                          update_wqe->max_burst_length,
 588                          update_wqe->first_burst_length,
 589                          update_wqe->max_recv_pdu_length,
 590                          update_wqe->max_send_pdu_length);
 591
 592        kwqe_arr[0] = (struct kwqe *) update_wqe;
 593        if (hba->cnic && hba->cnic->submit_kwqes)
 594                hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
 595}
 596
 597
 598/**
 599 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
 600 * @data:       endpoint (transport handle) structure pointer
 601 *
 602 * routine to handle connection offload/destroy request timeout
 603 */
 604void bnx2i_ep_ofld_timer(unsigned long data)
 605{
 606        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;
 607
 608        if (ep->state == EP_STATE_OFLD_START) {
 609                printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
 610                ep->state = EP_STATE_OFLD_FAILED;
 611        } else if (ep->state == EP_STATE_DISCONN_START) {
 612                printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
 613                ep->state = EP_STATE_DISCONN_TIMEDOUT;
 614        } else if (ep->state == EP_STATE_CLEANUP_START) {
 615                printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
 616                ep->state = EP_STATE_CLEANUP_FAILED;
 617        }
 618
 619        wake_up_interruptible(&ep->ofld_wait);
 620}
 621
 622
 623static int bnx2i_power_of2(u32 val)
 624{
 625        u32 power = 0;
 626        if (val & (val - 1))
 627                return power;
 628        val--;
 629        while (val) {
 630                val = val >> 1;
 631                power++;
 632        }
 633        return power;
 634}
 635
 636
 637/**
 638 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
 639 * @hba:        adapter structure pointer
 640 * @cmd:        driver command structure which is requesting
 641 *              a WQE to sent to chip for further processing
 642 *
 643 * prepares and posts CONN_OFLD_REQ1/2 KWQE
 644 */
 645void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
 646{
 647        struct bnx2i_cleanup_request *cmd_cleanup;
 648
 649        cmd_cleanup =
 650                (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
 651        memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
 652
 653        cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
 654        cmd_cleanup->itt = cmd->req.itt;
 655        cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
 656
 657        bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
 658}
 659
 660
 661/**
 662 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
 663 * @hba:        adapter structure pointer
 664 * @ep:         endpoint (transport indentifier) structure
 665 *
 666 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
 667 *      iscsi connection context clean-up process
 668 */
 669void bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 670{
 671        struct kwqe *kwqe_arr[2];
 672        struct iscsi_kwqe_conn_destroy conn_cleanup;
 673
 674        memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
 675
 676        conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
 677        conn_cleanup.hdr.flags =
 678                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 679        /* 5771x requires conn context id to be passed as is */
 680        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 681                conn_cleanup.context_id = ep->ep_cid;
 682        else
 683                conn_cleanup.context_id = (ep->ep_cid >> 7);
 684
 685        conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
 686
 687        kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
 688        if (hba->cnic && hba->cnic->submit_kwqes)
 689                hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
 690}
 691
 692
 693/**
 694 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
 695 * @hba:                adapter structure pointer
 696 * @ep:                 endpoint (transport indentifier) structure
 697 *
 698 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 699 */
 700static void bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
 701                                          struct bnx2i_endpoint *ep)
 702{
 703        struct kwqe *kwqe_arr[2];
 704        struct iscsi_kwqe_conn_offload1 ofld_req1;
 705        struct iscsi_kwqe_conn_offload2 ofld_req2;
 706        dma_addr_t dma_addr;
 707        int num_kwqes = 2;
 708        u32 *ptbl;
 709
 710        ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
 711        ofld_req1.hdr.flags =
 712                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 713
 714        ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
 715
 716        dma_addr = ep->qp.sq_pgtbl_phys;
 717        ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
 718        ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 719
 720        dma_addr = ep->qp.cq_pgtbl_phys;
 721        ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
 722        ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 723
 724        ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
 725        ofld_req2.hdr.flags =
 726                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 727
 728        dma_addr = ep->qp.rq_pgtbl_phys;
 729        ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
 730        ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 731
 732        ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
 733
 734        ofld_req2.sq_first_pte.hi = *ptbl++;
 735        ofld_req2.sq_first_pte.lo = *ptbl;
 736
 737        ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
 738        ofld_req2.cq_first_pte.hi = *ptbl++;
 739        ofld_req2.cq_first_pte.lo = *ptbl;
 740
 741        kwqe_arr[0] = (struct kwqe *) &ofld_req1;
 742        kwqe_arr[1] = (struct kwqe *) &ofld_req2;
 743        ofld_req2.num_additional_wqes = 0;
 744
 745        if (hba->cnic && hba->cnic->submit_kwqes)
 746                hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
 747}
 748
 749
 750/**
 751 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
 752 * @hba:                adapter structure pointer
 753 * @ep:                 endpoint (transport indentifier) structure
 754 *
 755 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 756 */
 757static void bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
 758                                           struct bnx2i_endpoint *ep)
 759{
 760        struct kwqe *kwqe_arr[5];
 761        struct iscsi_kwqe_conn_offload1 ofld_req1;
 762        struct iscsi_kwqe_conn_offload2 ofld_req2;
 763        struct iscsi_kwqe_conn_offload3 ofld_req3[1];
 764        dma_addr_t dma_addr;
 765        int num_kwqes = 2;
 766        u32 *ptbl;
 767
 768        ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
 769        ofld_req1.hdr.flags =
 770                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 771
 772        ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
 773
 774        dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
 775        ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
 776        ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 777
 778        dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
 779        ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
 780        ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 781
 782        ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
 783        ofld_req2.hdr.flags =
 784                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 785
 786        dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
 787        ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
 788        ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 789
 790        ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
 791        ofld_req2.sq_first_pte.hi = *ptbl++;
 792        ofld_req2.sq_first_pte.lo = *ptbl;
 793
 794        ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
 795        ofld_req2.cq_first_pte.hi = *ptbl++;
 796        ofld_req2.cq_first_pte.lo = *ptbl;
 797
 798        kwqe_arr[0] = (struct kwqe *) &ofld_req1;
 799        kwqe_arr[1] = (struct kwqe *) &ofld_req2;
 800
 801        ofld_req2.num_additional_wqes = 1;
 802        memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
 803        ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
 804        ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
 805        ofld_req3[0].qp_first_pte[0].lo = *ptbl;
 806
 807        kwqe_arr[2] = (struct kwqe *) ofld_req3;
 808        /* need if we decide to go with multiple KCQE's per conn */
 809        num_kwqes += 1;
 810
 811        if (hba->cnic && hba->cnic->submit_kwqes)
 812                hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
 813}
 814
 815/**
 816 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
 817 *
 818 * @hba:                adapter structure pointer
 819 * @ep:                 endpoint (transport indentifier) structure
 820 *
 821 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
 822 */
 823void bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 824{
 825        if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
 826                bnx2i_5771x_send_conn_ofld_req(hba, ep);
 827        else
 828                bnx2i_570x_send_conn_ofld_req(hba, ep);
 829}
 830
 831
 832/**
 833 * setup_qp_page_tables - iscsi QP page table setup function
 834 * @ep:         endpoint (transport indentifier) structure
 835 *
 836 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
 837 *      64-bit address in big endian format. Whereas 10G/sec (57710) requires
 838 *      PT in little endian format
 839 */
 840static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
 841{
 842        int num_pages;
 843        u32 *ptbl;
 844        dma_addr_t page;
 845        int cnic_dev_10g;
 846
 847        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 848                cnic_dev_10g = 1;
 849        else
 850                cnic_dev_10g = 0;
 851
 852        /* SQ page table */
 853        memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
 854        num_pages = ep->qp.sq_mem_size / PAGE_SIZE;
 855        page = ep->qp.sq_phys;
 856
 857        if (cnic_dev_10g)
 858                ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
 859        else
 860                ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
 861        while (num_pages--) {
 862                if (cnic_dev_10g) {
 863                        /* PTE is written in little endian format for 57710 */
 864                        *ptbl = (u32) page;
 865                        ptbl++;
 866                        *ptbl = (u32) ((u64) page >> 32);
 867                        ptbl++;
 868                        page += PAGE_SIZE;
 869                } else {
 870                        /* PTE is written in big endian format for
 871                         * 5706/5708/5709 devices */
 872                        *ptbl = (u32) ((u64) page >> 32);
 873                        ptbl++;
 874                        *ptbl = (u32) page;
 875                        ptbl++;
 876                        page += PAGE_SIZE;
 877                }
 878        }
 879
 880        /* RQ page table */
 881        memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
 882        num_pages = ep->qp.rq_mem_size / PAGE_SIZE;
 883        page = ep->qp.rq_phys;
 884
 885        if (cnic_dev_10g)
 886                ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
 887        else
 888                ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
 889        while (num_pages--) {
 890                if (cnic_dev_10g) {
 891                        /* PTE is written in little endian format for 57710 */
 892                        *ptbl = (u32) page;
 893                        ptbl++;
 894                        *ptbl = (u32) ((u64) page >> 32);
 895                        ptbl++;
 896                        page += PAGE_SIZE;
 897                } else {
 898                        /* PTE is written in big endian format for
 899                         * 5706/5708/5709 devices */
 900                        *ptbl = (u32) ((u64) page >> 32);
 901                        ptbl++;
 902                        *ptbl = (u32) page;
 903                        ptbl++;
 904                        page += PAGE_SIZE;
 905                }
 906        }
 907
 908        /* CQ page table */
 909        memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
 910        num_pages = ep->qp.cq_mem_size / PAGE_SIZE;
 911        page = ep->qp.cq_phys;
 912
 913        if (cnic_dev_10g)
 914                ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
 915        else
 916                ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
 917        while (num_pages--) {
 918                if (cnic_dev_10g) {
 919                        /* PTE is written in little endian format for 57710 */
 920                        *ptbl = (u32) page;
 921                        ptbl++;
 922                        *ptbl = (u32) ((u64) page >> 32);
 923                        ptbl++;
 924                        page += PAGE_SIZE;
 925                } else {
 926                        /* PTE is written in big endian format for
 927                         * 5706/5708/5709 devices */
 928                        *ptbl = (u32) ((u64) page >> 32);
 929                        ptbl++;
 930                        *ptbl = (u32) page;
 931                        ptbl++;
 932                        page += PAGE_SIZE;
 933                }
 934        }
 935}
 936
 937
 938/**
 939 * bnx2i_alloc_qp_resc - allocates required resources for QP.
 940 * @hba:        adapter structure pointer
 941 * @ep:         endpoint (transport indentifier) structure
 942 *
 943 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
 944 *      memory for SQ/RQ/CQ and page tables. EP structure elements such
 945 *      as producer/consumer indexes/pointers, queue sizes and page table
 946 *      contents are setup
 947 */
 948int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 949{
 950        struct bnx2i_5771x_cq_db *cq_db;
 951
 952        ep->hba = hba;
 953        ep->conn = NULL;
 954        ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
 955
 956        /* Allocate page table memory for SQ which is page aligned */
 957        ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
 958        ep->qp.sq_mem_size =
 959                (ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 960        ep->qp.sq_pgtbl_size =
 961                (ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *);
 962        ep->qp.sq_pgtbl_size =
 963                (ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 964
 965        ep->qp.sq_pgtbl_virt =
 966                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
 967                                   &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
 968        if (!ep->qp.sq_pgtbl_virt) {
 969                printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
 970                                  ep->qp.sq_pgtbl_size);
 971                goto mem_alloc_err;
 972        }
 973
 974        /* Allocate memory area for actual SQ element */
 975        ep->qp.sq_virt =
 976                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
 977                                   &ep->qp.sq_phys, GFP_KERNEL);
 978        if (!ep->qp.sq_virt) {
 979                printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
 980                                  ep->qp.sq_mem_size);
 981                goto mem_alloc_err;
 982        }
 983
 984        memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
 985        ep->qp.sq_first_qe = ep->qp.sq_virt;
 986        ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
 987        ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
 988        ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
 989        ep->qp.sq_prod_idx = 0;
 990        ep->qp.sq_cons_idx = 0;
 991        ep->qp.sqe_left = hba->max_sqes;
 992
 993        /* Allocate page table memory for CQ which is page aligned */
 994        ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
 995        ep->qp.cq_mem_size =
 996                (ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 997        ep->qp.cq_pgtbl_size =
 998                (ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *);
 999        ep->qp.cq_pgtbl_size =
1000                (ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1001
1002        ep->qp.cq_pgtbl_virt =
1003                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1004                                   &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1005        if (!ep->qp.cq_pgtbl_virt) {
1006                printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1007                                  ep->qp.cq_pgtbl_size);
1008                goto mem_alloc_err;
1009        }
1010
1011        /* Allocate memory area for actual CQ element */
1012        ep->qp.cq_virt =
1013                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1014                                   &ep->qp.cq_phys, GFP_KERNEL);
1015        if (!ep->qp.cq_virt) {
1016                printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1017                                  ep->qp.cq_mem_size);
1018                goto mem_alloc_err;
1019        }
1020        memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
1021
1022        ep->qp.cq_first_qe = ep->qp.cq_virt;
1023        ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1024        ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1025        ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1026        ep->qp.cq_prod_idx = 0;
1027        ep->qp.cq_cons_idx = 0;
1028        ep->qp.cqe_left = hba->max_cqes;
1029        ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1030        ep->qp.cqe_size = hba->max_cqes;
1031
1032        /* Invalidate all EQ CQE index, req only for 57710 */
1033        cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1034        memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1035
1036        /* Allocate page table memory for RQ which is page aligned */
1037        ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1038        ep->qp.rq_mem_size =
1039                (ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1040        ep->qp.rq_pgtbl_size =
1041                (ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *);
1042        ep->qp.rq_pgtbl_size =
1043                (ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1044
1045        ep->qp.rq_pgtbl_virt =
1046                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1047                                   &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1048        if (!ep->qp.rq_pgtbl_virt) {
1049                printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1050                                  ep->qp.rq_pgtbl_size);
1051                goto mem_alloc_err;
1052        }
1053
1054        /* Allocate memory area for actual RQ element */
1055        ep->qp.rq_virt =
1056                dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1057                                   &ep->qp.rq_phys, GFP_KERNEL);
1058        if (!ep->qp.rq_virt) {
1059                printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1060                                  ep->qp.rq_mem_size);
1061                goto mem_alloc_err;
1062        }
1063
1064        ep->qp.rq_first_qe = ep->qp.rq_virt;
1065        ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1066        ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1067        ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1068        ep->qp.rq_prod_idx = 0x8000;
1069        ep->qp.rq_cons_idx = 0;
1070        ep->qp.rqe_left = hba->max_rqes;
1071
1072        setup_qp_page_tables(ep);
1073
1074        return 0;
1075
1076mem_alloc_err:
1077        bnx2i_free_qp_resc(hba, ep);
1078        return -ENOMEM;
1079}
1080
1081
1082
1083/**
1084 * bnx2i_free_qp_resc - free memory resources held by QP
1085 * @hba:        adapter structure pointer
1086 * @ep: endpoint (transport indentifier) structure
1087 *
1088 * Free QP resources - SQ/RQ/CQ memory and page tables.
1089 */
1090void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1091{
1092        if (ep->qp.ctx_base) {
1093                iounmap(ep->qp.ctx_base);
1094                ep->qp.ctx_base = NULL;
1095        }
1096        /* Free SQ mem */
1097        if (ep->qp.sq_pgtbl_virt) {
1098                dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1099                                  ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1100                ep->qp.sq_pgtbl_virt = NULL;
1101                ep->qp.sq_pgtbl_phys = 0;
1102        }
1103        if (ep->qp.sq_virt) {
1104                dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1105                                  ep->qp.sq_virt, ep->qp.sq_phys);
1106                ep->qp.sq_virt = NULL;
1107                ep->qp.sq_phys = 0;
1108        }
1109
1110        /* Free RQ mem */
1111        if (ep->qp.rq_pgtbl_virt) {
1112                dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1113                                  ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1114                ep->qp.rq_pgtbl_virt = NULL;
1115                ep->qp.rq_pgtbl_phys = 0;
1116        }
1117        if (ep->qp.rq_virt) {
1118                dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1119                                  ep->qp.rq_virt, ep->qp.rq_phys);
1120                ep->qp.rq_virt = NULL;
1121                ep->qp.rq_phys = 0;
1122        }
1123
1124        /* Free CQ mem */
1125        if (ep->qp.cq_pgtbl_virt) {
1126                dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1127                                  ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1128                ep->qp.cq_pgtbl_virt = NULL;
1129                ep->qp.cq_pgtbl_phys = 0;
1130        }
1131        if (ep->qp.cq_virt) {
1132                dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1133                                  ep->qp.cq_virt, ep->qp.cq_phys);
1134                ep->qp.cq_virt = NULL;
1135                ep->qp.cq_phys = 0;
1136        }
1137}
1138
1139
1140/**
1141 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1142 * @hba:        adapter structure pointer
1143 *
1144 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1145 *      This results in iSCSi support validation and on-chip context manager
1146 *      initialization.  Firmware completes this handshake with a CQE carrying
1147 *      the result of iscsi support validation. Parameter carried by
1148 *      iscsi init request determines the number of offloaded connection and
1149 *      tolerance level for iscsi protocol violation this hba/chip can support
1150 */
1151int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1152{
1153        struct kwqe *kwqe_arr[3];
1154        struct iscsi_kwqe_init1 iscsi_init;
1155        struct iscsi_kwqe_init2 iscsi_init2;
1156        int rc = 0;
1157        u64 mask64;
1158
1159        bnx2i_adjust_qp_size(hba);
1160
1161        iscsi_init.flags =
1162                ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1163        if (en_tcp_dack)
1164                iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1165        iscsi_init.reserved0 = 0;
1166        iscsi_init.num_cqs = 1;
1167        iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1168        iscsi_init.hdr.flags =
1169                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1170
1171        iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1172        iscsi_init.dummy_buffer_addr_hi =
1173                (u32) ((u64) hba->dummy_buf_dma >> 32);
1174
1175        hba->ctx_ccell_tasks =
1176                        ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1177        iscsi_init.num_ccells_per_conn = hba->num_ccell;
1178        iscsi_init.num_tasks_per_conn = hba->max_sqes;
1179        iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1180        iscsi_init.sq_num_wqes = hba->max_sqes;
1181        iscsi_init.cq_log_wqes_per_page =
1182                (u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE);
1183        iscsi_init.cq_num_wqes = hba->max_cqes;
1184        iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1185                                   (PAGE_SIZE - 1)) / PAGE_SIZE;
1186        iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1187                                   (PAGE_SIZE - 1)) / PAGE_SIZE;
1188        iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1189        iscsi_init.rq_num_wqes = hba->max_rqes;
1190
1191
1192        iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1193        iscsi_init2.hdr.flags =
1194                (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1195        iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1196        mask64 = 0x0ULL;
1197        mask64 |= (
1198                /* CISCO MDS */
1199                (1UL <<
1200                  ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1201                /* HP MSA1510i */
1202                (1UL <<
1203                  ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1204                /* EMC */
1205                (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1206        if (error_mask1)
1207                iscsi_init2.error_bit_map[0] = error_mask1;
1208        else
1209                iscsi_init2.error_bit_map[0] = (u32) mask64;
1210
1211        if (error_mask2)
1212                iscsi_init2.error_bit_map[1] = error_mask2;
1213        else
1214                iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1215
1216        iscsi_error_mask = mask64;
1217
1218        kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1219        kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1220
1221        if (hba->cnic && hba->cnic->submit_kwqes)
1222                rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1223        return rc;
1224}
1225
1226
1227/**
1228 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1229 * @conn:       iscsi connection
1230 * @cqe:        pointer to newly DMA'ed CQE entry for processing
1231 *
1232 * process SCSI CMD Response CQE & complete the request to SCSI-ML
1233 */
1234static int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1235                                       struct bnx2i_conn *bnx2i_conn,
1236                                       struct cqe *cqe)
1237{
1238        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1239        struct bnx2i_cmd_response *resp_cqe;
1240        struct bnx2i_cmd *bnx2i_cmd;
1241        struct iscsi_task *task;
1242        struct iscsi_cmd_rsp *hdr;
1243        u32 datalen = 0;
1244
1245        resp_cqe = (struct bnx2i_cmd_response *)cqe;
1246        spin_lock(&session->lock);
1247        task = iscsi_itt_to_task(conn,
1248                                 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1249        if (!task)
1250                goto fail;
1251
1252        bnx2i_cmd = task->dd_data;
1253
1254        if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1255                conn->datain_pdus_cnt +=
1256                        resp_cqe->task_stat.read_stat.num_data_outs;
1257                conn->rxdata_octets +=
1258                        bnx2i_cmd->req.total_data_transfer_length;
1259        } else {
1260                conn->dataout_pdus_cnt +=
1261                        resp_cqe->task_stat.read_stat.num_data_outs;
1262                conn->r2t_pdus_cnt +=
1263                        resp_cqe->task_stat.read_stat.num_r2ts;
1264                conn->txdata_octets +=
1265                        bnx2i_cmd->req.total_data_transfer_length;
1266        }
1267        bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1268
1269        hdr = (struct iscsi_cmd_rsp *)task->hdr;
1270        resp_cqe = (struct bnx2i_cmd_response *)cqe;
1271        hdr->opcode = resp_cqe->op_code;
1272        hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1273        hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1274        hdr->response = resp_cqe->response;
1275        hdr->cmd_status = resp_cqe->status;
1276        hdr->flags = resp_cqe->response_flags;
1277        hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1278
1279        if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1280                goto done;
1281
1282        if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1283                datalen = resp_cqe->data_length;
1284                if (datalen < 2)
1285                        goto done;
1286
1287                if (datalen > BNX2I_RQ_WQE_SIZE) {
1288                        iscsi_conn_printk(KERN_ERR, conn,
1289                                          "sense data len %d > RQ sz\n",
1290                                          datalen);
1291                        datalen = BNX2I_RQ_WQE_SIZE;
1292                } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1293                        iscsi_conn_printk(KERN_ERR, conn,
1294                                          "sense data len %d > conn data\n",
1295                                          datalen);
1296                        datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1297                }
1298
1299                bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1300                bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1301        }
1302
1303done:
1304        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1305                             conn->data, datalen);
1306fail:
1307        spin_unlock(&session->lock);
1308        return 0;
1309}
1310
1311
1312/**
1313 * bnx2i_process_login_resp - this function handles iscsi login response
1314 * @session:            iscsi session pointer
1315 * @bnx2i_conn:         iscsi connection pointer
1316 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1317 *
1318 * process Login Response CQE & complete it to open-iscsi user daemon
1319 */
1320static int bnx2i_process_login_resp(struct iscsi_session *session,
1321                                    struct bnx2i_conn *bnx2i_conn,
1322                                    struct cqe *cqe)
1323{
1324        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1325        struct iscsi_task *task;
1326        struct bnx2i_login_response *login;
1327        struct iscsi_login_rsp *resp_hdr;
1328        int pld_len;
1329        int pad_len;
1330
1331        login = (struct bnx2i_login_response *) cqe;
1332        spin_lock(&session->lock);
1333        task = iscsi_itt_to_task(conn,
1334                                 login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1335        if (!task)
1336                goto done;
1337
1338        resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1339        memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1340        resp_hdr->opcode = login->op_code;
1341        resp_hdr->flags = login->response_flags;
1342        resp_hdr->max_version = login->version_max;
1343        resp_hdr->active_version = login->version_active;
1344        resp_hdr->hlength = 0;
1345
1346        hton24(resp_hdr->dlength, login->data_length);
1347        memcpy(resp_hdr->isid, &login->isid_lo, 6);
1348        resp_hdr->tsih = cpu_to_be16(login->tsih);
1349        resp_hdr->itt = task->hdr->itt;
1350        resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1351        resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1352        resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1353        resp_hdr->status_class = login->status_class;
1354        resp_hdr->status_detail = login->status_detail;
1355        pld_len = login->data_length;
1356        bnx2i_conn->gen_pdu.resp_wr_ptr =
1357                                        bnx2i_conn->gen_pdu.resp_buf + pld_len;
1358
1359        pad_len = 0;
1360        if (pld_len & 0x3)
1361                pad_len = 4 - (pld_len % 4);
1362
1363        if (pad_len) {
1364                int i = 0;
1365                for (i = 0; i < pad_len; i++) {
1366                        bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1367                        bnx2i_conn->gen_pdu.resp_wr_ptr++;
1368                }
1369        }
1370
1371        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1372                bnx2i_conn->gen_pdu.resp_buf,
1373                bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1374done:
1375        spin_unlock(&session->lock);
1376        return 0;
1377}
1378
1379/**
1380 * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1381 * @session:            iscsi session pointer
1382 * @bnx2i_conn:         iscsi connection pointer
1383 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1384 *
1385 * process iSCSI TMF Response CQE and wake up the driver eh thread.
1386 */
1387static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1388                                  struct bnx2i_conn *bnx2i_conn,
1389                                  struct cqe *cqe)
1390{
1391        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1392        struct iscsi_task *task;
1393        struct bnx2i_tmf_response *tmf_cqe;
1394        struct iscsi_tm_rsp *resp_hdr;
1395
1396        tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1397        spin_lock(&session->lock);
1398        task = iscsi_itt_to_task(conn,
1399                                 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1400        if (!task)
1401                goto done;
1402
1403        resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1404        memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1405        resp_hdr->opcode = tmf_cqe->op_code;
1406        resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1407        resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1408        resp_hdr->itt = task->hdr->itt;
1409        resp_hdr->response = tmf_cqe->response;
1410
1411        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1412done:
1413        spin_unlock(&session->lock);
1414        return 0;
1415}
1416
1417/**
1418 * bnx2i_process_logout_resp - this function handles iscsi logout response
1419 * @session:            iscsi session pointer
1420 * @bnx2i_conn:         iscsi connection pointer
1421 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1422 *
1423 * process iSCSI Logout Response CQE & make function call to
1424 * notify the user daemon.
1425 */
1426static int bnx2i_process_logout_resp(struct iscsi_session *session,
1427                                     struct bnx2i_conn *bnx2i_conn,
1428                                     struct cqe *cqe)
1429{
1430        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1431        struct iscsi_task *task;
1432        struct bnx2i_logout_response *logout;
1433        struct iscsi_logout_rsp *resp_hdr;
1434
1435        logout = (struct bnx2i_logout_response *) cqe;
1436        spin_lock(&session->lock);
1437        task = iscsi_itt_to_task(conn,
1438                                 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1439        if (!task)
1440                goto done;
1441
1442        resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1443        memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1444        resp_hdr->opcode = logout->op_code;
1445        resp_hdr->flags = logout->response;
1446        resp_hdr->hlength = 0;
1447
1448        resp_hdr->itt = task->hdr->itt;
1449        resp_hdr->statsn = task->hdr->exp_statsn;
1450        resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1451        resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1452
1453        resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1454        resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1455
1456        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1457done:
1458        spin_unlock(&session->lock);
1459        return 0;
1460}
1461
1462/**
1463 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1464 * @session:            iscsi session pointer
1465 * @bnx2i_conn:         iscsi connection pointer
1466 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1467 *
1468 * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1469 */
1470static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1471                                           struct bnx2i_conn *bnx2i_conn,
1472                                           struct cqe *cqe)
1473{
1474        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1475        struct bnx2i_nop_in_msg *nop_in;
1476        struct iscsi_task *task;
1477
1478        nop_in = (struct bnx2i_nop_in_msg *)cqe;
1479        spin_lock(&session->lock);
1480        task = iscsi_itt_to_task(conn,
1481                                 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1482        if (task)
1483                iscsi_put_task(task);
1484        spin_unlock(&session->lock);
1485}
1486
1487/**
1488 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1489 * @conn:       iscsi connection
1490 *
1491 * Firmware advances RQ producer index for every unsolicited PDU even if
1492 *      payload data length is '0'. This function makes corresponding
1493 *      adjustments on the driver side to match this f/w behavior
1494 */
1495static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1496{
1497        char dummy_rq_data[2];
1498        bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1499        bnx2i_put_rq_buf(bnx2i_conn, 1);
1500}
1501
1502
1503/**
1504 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1505 * @session:            iscsi session pointer
1506 * @bnx2i_conn:         iscsi connection pointer
1507 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1508 *
1509 * process iSCSI target's proactive iSCSI NOPIN request
1510 */
1511static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1512                                     struct bnx2i_conn *bnx2i_conn,
1513                                     struct cqe *cqe)
1514{
1515        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1516        struct iscsi_task *task;
1517        struct bnx2i_nop_in_msg *nop_in;
1518        struct iscsi_nopin *hdr;
1519        u32 itt;
1520        int tgt_async_nop = 0;
1521
1522        nop_in = (struct bnx2i_nop_in_msg *)cqe;
1523        itt = nop_in->itt & ISCSI_NOP_IN_MSG_INDEX;
1524
1525        spin_lock(&session->lock);
1526        hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1527        memset(hdr, 0, sizeof(struct iscsi_hdr));
1528        hdr->opcode = nop_in->op_code;
1529        hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1530        hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1531        hdr->ttt = cpu_to_be32(nop_in->ttt);
1532
1533        if (itt == (u16) RESERVED_ITT) {
1534                bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1535                hdr->itt = RESERVED_ITT;
1536                tgt_async_nop = 1;
1537                goto done;
1538        }
1539
1540        /* this is a response to one of our nop-outs */
1541        task = iscsi_itt_to_task(conn, itt);
1542        if (task) {
1543                hdr->flags = ISCSI_FLAG_CMD_FINAL;
1544                hdr->itt = task->hdr->itt;
1545                hdr->ttt = cpu_to_be32(nop_in->ttt);
1546                memcpy(hdr->lun, nop_in->lun, 8);
1547        }
1548done:
1549        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1550        spin_unlock(&session->lock);
1551
1552        return tgt_async_nop;
1553}
1554
1555
1556/**
1557 * bnx2i_process_async_mesg - this function handles iscsi async message
1558 * @session:            iscsi session pointer
1559 * @bnx2i_conn:         iscsi connection pointer
1560 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1561 *
1562 * process iSCSI ASYNC Message
1563 */
1564static void bnx2i_process_async_mesg(struct iscsi_session *session,
1565                                     struct bnx2i_conn *bnx2i_conn,
1566                                     struct cqe *cqe)
1567{
1568        struct bnx2i_async_msg *async_cqe;
1569        struct iscsi_async *resp_hdr;
1570        u8 async_event;
1571
1572        bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1573
1574        async_cqe = (struct bnx2i_async_msg *)cqe;
1575        async_event = async_cqe->async_event;
1576
1577        if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1578                iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1579                                  "async: scsi events not supported\n");
1580                return;
1581        }
1582
1583        spin_lock(&session->lock);
1584        resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1585        memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1586        resp_hdr->opcode = async_cqe->op_code;
1587        resp_hdr->flags = 0x80;
1588
1589        memcpy(resp_hdr->lun, async_cqe->lun, 8);
1590        resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1591        resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1592
1593        resp_hdr->async_event = async_cqe->async_event;
1594        resp_hdr->async_vcode = async_cqe->async_vcode;
1595
1596        resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1597        resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1598        resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1599
1600        __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1601                             (struct iscsi_hdr *)resp_hdr, NULL, 0);
1602        spin_unlock(&session->lock);
1603}
1604
1605
1606/**
1607 * bnx2i_process_reject_mesg - process iscsi reject pdu
1608 * @session:            iscsi session pointer
1609 * @bnx2i_conn:         iscsi connection pointer
1610 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1611 *
1612 * process iSCSI REJECT message
1613 */
1614static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1615                                      struct bnx2i_conn *bnx2i_conn,
1616                                      struct cqe *cqe)
1617{
1618        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1619        struct bnx2i_reject_msg *reject;
1620        struct iscsi_reject *hdr;
1621
1622        reject = (struct bnx2i_reject_msg *) cqe;
1623        if (reject->data_length) {
1624                bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1625                bnx2i_put_rq_buf(bnx2i_conn, 1);
1626        } else
1627                bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1628
1629        spin_lock(&session->lock);
1630        hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1631        memset(hdr, 0, sizeof(struct iscsi_hdr));
1632        hdr->opcode = reject->op_code;
1633        hdr->reason = reject->reason;
1634        hton24(hdr->dlength, reject->data_length);
1635        hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1636        hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1637        hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1638        __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1639                             reject->data_length);
1640        spin_unlock(&session->lock);
1641}
1642
1643/**
1644 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1645 * @session:            iscsi session pointer
1646 * @bnx2i_conn:         iscsi connection pointer
1647 * @cqe:                pointer to newly DMA'ed CQE entry for processing
1648 *
1649 * process command cleanup response CQE during conn shutdown or error recovery
1650 */
1651static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1652                                           struct bnx2i_conn *bnx2i_conn,
1653                                           struct cqe *cqe)
1654{
1655        struct bnx2i_cleanup_response *cmd_clean_rsp;
1656        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1657        struct iscsi_task *task;
1658
1659        cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1660        spin_lock(&session->lock);
1661        task = iscsi_itt_to_task(conn,
1662                        cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1663        if (!task)
1664                printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1665                        cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1666        spin_unlock(&session->lock);
1667        complete(&bnx2i_conn->cmd_cleanup_cmpl);
1668}
1669
1670
1671
1672/**
1673 * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1674 * @bnx2i_conn:         iscsi connection
1675 *
1676 * this function is called by generic KCQ handler to process all pending CQE's
1677 */
1678static void bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
1679{
1680        struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1681        struct iscsi_session *session = conn->session;
1682        struct qp_info *qp = &bnx2i_conn->ep->qp;
1683        struct bnx2i_nop_in_msg *nopin;
1684        int tgt_async_msg;
1685
1686        while (1) {
1687                nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1688                if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1689                        break;
1690
1691                if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx)))
1692                        break;
1693
1694                tgt_async_msg = 0;
1695
1696                switch (nopin->op_code) {
1697                case ISCSI_OP_SCSI_CMD_RSP:
1698                case ISCSI_OP_SCSI_DATA_IN:
1699                        bnx2i_process_scsi_cmd_resp(session, bnx2i_conn,
1700                                                    qp->cq_cons_qe);
1701                        break;
1702                case ISCSI_OP_LOGIN_RSP:
1703                        bnx2i_process_login_resp(session, bnx2i_conn,
1704                                                 qp->cq_cons_qe);
1705                        break;
1706                case ISCSI_OP_SCSI_TMFUNC_RSP:
1707                        bnx2i_process_tmf_resp(session, bnx2i_conn,
1708                                               qp->cq_cons_qe);
1709                        break;
1710                case ISCSI_OP_LOGOUT_RSP:
1711                        bnx2i_process_logout_resp(session, bnx2i_conn,
1712                                                  qp->cq_cons_qe);
1713                        break;
1714                case ISCSI_OP_NOOP_IN:
1715                        if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
1716                                                     qp->cq_cons_qe))
1717                                tgt_async_msg = 1;
1718                        break;
1719                case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
1720                        bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
1721                                                       qp->cq_cons_qe);
1722                        break;
1723                case ISCSI_OP_ASYNC_EVENT:
1724                        bnx2i_process_async_mesg(session, bnx2i_conn,
1725                                                 qp->cq_cons_qe);
1726                        tgt_async_msg = 1;
1727                        break;
1728                case ISCSI_OP_REJECT:
1729                        bnx2i_process_reject_mesg(session, bnx2i_conn,
1730                                                  qp->cq_cons_qe);
1731                        break;
1732                case ISCSI_OPCODE_CLEANUP_RESPONSE:
1733                        bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
1734                                                       qp->cq_cons_qe);
1735                        break;
1736                default:
1737                        printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
1738                                          nopin->op_code);
1739                }
1740
1741                if (!tgt_async_msg)
1742                        bnx2i_conn->ep->num_active_cmds--;
1743
1744                /* clear out in production version only, till beta keep opcode
1745                 * field intact, will be helpful in debugging (context dump)
1746                 * nopin->op_code = 0;
1747                 */
1748                qp->cqe_exp_seq_sn++;
1749                if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
1750                        qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1751
1752                if (qp->cq_cons_qe == qp->cq_last_qe) {
1753                        qp->cq_cons_qe = qp->cq_first_qe;
1754                        qp->cq_cons_idx = 0;
1755                } else {
1756                        qp->cq_cons_qe++;
1757                        qp->cq_cons_idx++;
1758                }
1759        }
1760        bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1761}
1762
1763/**
1764 * bnx2i_fastpath_notification - process global event queue (KCQ)
1765 * @hba:                adapter structure pointer
1766 * @new_cqe_kcqe:       pointer to newly DMA'ed KCQE entry
1767 *
1768 * Fast path event notification handler, KCQ entry carries context id
1769 *      of the connection that has 1 or more pending CQ entries
1770 */
1771static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
1772                                        struct iscsi_kcqe *new_cqe_kcqe)
1773{
1774        struct bnx2i_conn *conn;
1775        u32 iscsi_cid;
1776
1777        iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
1778        conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1779
1780        if (!conn) {
1781                printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
1782                return;
1783        }
1784        if (!conn->ep) {
1785                printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
1786                return;
1787        }
1788
1789        bnx2i_process_new_cqes(conn);
1790}
1791
1792
1793/**
1794 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
1795 * @hba:                adapter structure pointer
1796 * @update_kcqe:        kcqe pointer
1797 *
1798 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
1799 */
1800static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
1801                                           struct iscsi_kcqe *update_kcqe)
1802{
1803        struct bnx2i_conn *conn;
1804        u32 iscsi_cid;
1805
1806        iscsi_cid = update_kcqe->iscsi_conn_id;
1807        conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1808
1809        if (!conn) {
1810                printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
1811                return;
1812        }
1813        if (!conn->ep) {
1814                printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
1815                return;
1816        }
1817
1818        if (update_kcqe->completion_status) {
1819                printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
1820                conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
1821        } else
1822                conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
1823
1824        wake_up_interruptible(&conn->ep->ofld_wait);
1825}
1826
1827
1828/**
1829 * bnx2i_recovery_que_add_conn - add connection to recovery queue
1830 * @hba:                adapter structure pointer
1831 * @bnx2i_conn:         iscsi connection
1832 *
1833 * Add connection to recovery queue and schedule adapter eh worker
1834 */
1835static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
1836                                        struct bnx2i_conn *bnx2i_conn)
1837{
1838        iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
1839                           ISCSI_ERR_CONN_FAILED);
1840}
1841
1842
1843/**
1844 * bnx2i_process_tcp_error - process error notification on a given connection
1845 *
1846 * @hba:                adapter structure pointer
1847 * @tcp_err:            tcp error kcqe pointer
1848 *
1849 * handles tcp level error notifications from FW.
1850 */
1851static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
1852                                    struct iscsi_kcqe *tcp_err)
1853{
1854        struct bnx2i_conn *bnx2i_conn;
1855        u32 iscsi_cid;
1856
1857        iscsi_cid = tcp_err->iscsi_conn_id;
1858        bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1859
1860        if (!bnx2i_conn) {
1861                printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1862                return;
1863        }
1864
1865        printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
1866                          iscsi_cid, tcp_err->completion_status);
1867        bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
1868}
1869
1870
1871/**
1872 * bnx2i_process_iscsi_error - process error notification on a given connection
1873 * @hba:                adapter structure pointer
1874 * @iscsi_err:          iscsi error kcqe pointer
1875 *
1876 * handles iscsi error notifications from the FW. Firmware based in initial
1877 *      handshake classifies iscsi protocol / TCP rfc violation into either
1878 *      warning or error indications. If indication is of "Error" type, driver
1879 *      will initiate session recovery for that connection/session. For
1880 *      "Warning" type indication, driver will put out a system log message
1881 *      (there will be only one message for each type for the life of the
1882 *      session, this is to avoid un-necessarily overloading the system)
1883 */
1884static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
1885                                      struct iscsi_kcqe *iscsi_err)
1886{
1887        struct bnx2i_conn *bnx2i_conn;
1888        u32 iscsi_cid;
1889        char warn_notice[] = "iscsi_warning";
1890        char error_notice[] = "iscsi_error";
1891        char additional_notice[64];
1892        char *message;
1893        int need_recovery;
1894        u64 err_mask64;
1895
1896        iscsi_cid = iscsi_err->iscsi_conn_id;
1897        bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1898        if (!bnx2i_conn) {
1899                printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1900                return;
1901        }
1902
1903        err_mask64 = (0x1ULL << iscsi_err->completion_status);
1904
1905        if (err_mask64 & iscsi_error_mask) {
1906                need_recovery = 0;
1907                message = warn_notice;
1908        } else {
1909                need_recovery = 1;
1910                message = error_notice;
1911        }
1912
1913        switch (iscsi_err->completion_status) {
1914        case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
1915                strcpy(additional_notice, "hdr digest err");
1916                break;
1917        case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
1918                strcpy(additional_notice, "data digest err");
1919                break;
1920        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
1921                strcpy(additional_notice, "wrong opcode rcvd");
1922                break;
1923        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
1924                strcpy(additional_notice, "AHS len > 0 rcvd");
1925                break;
1926        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
1927                strcpy(additional_notice, "invalid ITT rcvd");
1928                break;
1929        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
1930                strcpy(additional_notice, "wrong StatSN rcvd");
1931                break;
1932        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
1933                strcpy(additional_notice, "wrong DataSN rcvd");
1934                break;
1935        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
1936                strcpy(additional_notice, "pend R2T violation");
1937                break;
1938        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
1939                strcpy(additional_notice, "ERL0, UO");
1940                break;
1941        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
1942                strcpy(additional_notice, "ERL0, U1");
1943                break;
1944        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
1945                strcpy(additional_notice, "ERL0, U2");
1946                break;
1947        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
1948                strcpy(additional_notice, "ERL0, U3");
1949                break;
1950        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
1951                strcpy(additional_notice, "ERL0, U4");
1952                break;
1953        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
1954                strcpy(additional_notice, "ERL0, U5");
1955                break;
1956        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
1957                strcpy(additional_notice, "ERL0, U6");
1958                break;
1959        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
1960                strcpy(additional_notice, "invalid resi len");
1961                break;
1962        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
1963                strcpy(additional_notice, "MRDSL violation");
1964                break;
1965        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
1966                strcpy(additional_notice, "F-bit not set");
1967                break;
1968        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
1969                strcpy(additional_notice, "invalid TTT");
1970                break;
1971        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
1972                strcpy(additional_notice, "invalid DataSN");
1973                break;
1974        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
1975                strcpy(additional_notice, "burst len violation");
1976                break;
1977        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
1978                strcpy(additional_notice, "buf offset violation");
1979                break;
1980        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
1981                strcpy(additional_notice, "invalid LUN field");
1982                break;
1983        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
1984                strcpy(additional_notice, "invalid R2TSN field");
1985                break;
1986#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0       \
1987        ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
1988        case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
1989                strcpy(additional_notice, "invalid cmd len1");
1990                break;
1991#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1       \
1992        ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
1993        case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
1994                strcpy(additional_notice, "invalid cmd len2");
1995                break;
1996        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
1997                strcpy(additional_notice,
1998                       "pend r2t exceeds MaxOutstandingR2T value");
1999                break;
2000        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2001                strcpy(additional_notice, "TTT is rsvd");
2002                break;
2003        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2004                strcpy(additional_notice, "MBL violation");
2005                break;
2006#define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO         \
2007        ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2008        case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2009                strcpy(additional_notice, "data seg len != 0");
2010                break;
2011        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2012                strcpy(additional_notice, "reject pdu len error");
2013                break;
2014        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2015                strcpy(additional_notice, "async pdu len error");
2016                break;
2017        case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2018                strcpy(additional_notice, "nopin pdu len error");
2019                break;
2020#define BNX2_ERR_PEND_R2T_IN_CLEANUP                    \
2021        ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2022        case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2023                strcpy(additional_notice, "pend r2t in cleanup");
2024                break;
2025
2026        case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2027                strcpy(additional_notice, "IP fragments rcvd");
2028                break;
2029        case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2030                strcpy(additional_notice, "IP options error");
2031                break;
2032        case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2033                strcpy(additional_notice, "urgent flag error");
2034                break;
2035        default:
2036                printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2037                                  iscsi_err->completion_status);
2038        }
2039
2040        if (need_recovery) {
2041                iscsi_conn_printk(KERN_ALERT,
2042                                  bnx2i_conn->cls_conn->dd_data,
2043                                  "bnx2i: %s - %s\n",
2044                                  message, additional_notice);
2045
2046                iscsi_conn_printk(KERN_ALERT,
2047                                  bnx2i_conn->cls_conn->dd_data,
2048                                  "conn_err - hostno %d conn %p, "
2049                                  "iscsi_cid %x cid %x\n",
2050                                  bnx2i_conn->hba->shost->host_no,
2051                                  bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2052                                  bnx2i_conn->ep->ep_cid);
2053                bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2054        } else
2055                if (!test_and_set_bit(iscsi_err->completion_status,
2056                                      (void *) &bnx2i_conn->violation_notified))
2057                        iscsi_conn_printk(KERN_ALERT,
2058                                          bnx2i_conn->cls_conn->dd_data,
2059                                          "bnx2i: %s - %s\n",
2060                                          message, additional_notice);
2061}
2062
2063
2064/**
2065 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2066 * @hba:                adapter structure pointer
2067 * @conn_destroy:       conn destroy kcqe pointer
2068 *
2069 * handles connection destroy completion request.
2070 */
2071static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2072                                            struct iscsi_kcqe *conn_destroy)
2073{
2074        struct bnx2i_endpoint *ep;
2075
2076        ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2077        if (!ep) {
2078                printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2079                                  "offload request, unexpected complection\n");
2080                return;
2081        }
2082
2083        if (hba != ep->hba) {
2084                printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2085                return;
2086        }
2087
2088        if (conn_destroy->completion_status) {
2089                printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2090                ep->state = EP_STATE_CLEANUP_FAILED;
2091        } else
2092                ep->state = EP_STATE_CLEANUP_CMPL;
2093        wake_up_interruptible(&ep->ofld_wait);
2094}
2095
2096
2097/**
2098 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2099 * @hba:                adapter structure pointer
2100 * @ofld_kcqe:          conn offload kcqe pointer
2101 *
2102 * handles initial connection offload completion, ep_connect() thread is
2103 *      woken-up to continue with LLP connect process
2104 */
2105static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2106                                    struct iscsi_kcqe *ofld_kcqe)
2107{
2108        u32 cid_addr;
2109        struct bnx2i_endpoint *ep;
2110        u32 cid_num;
2111
2112        ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2113        if (!ep) {
2114                printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2115                return;
2116        }
2117
2118        if (hba != ep->hba) {
2119                printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2120                return;
2121        }
2122
2123        if (ofld_kcqe->completion_status) {
2124                if (ofld_kcqe->completion_status ==
2125                    ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2126                        printk(KERN_ALERT "bnx2i: unable to allocate"
2127                                          " iSCSI context resources\n");
2128                ep->state = EP_STATE_OFLD_FAILED;
2129        } else {
2130                ep->state = EP_STATE_OFLD_COMPL;
2131                cid_addr = ofld_kcqe->iscsi_conn_context_id;
2132                cid_num = bnx2i_get_cid_num(ep);
2133                ep->ep_cid = cid_addr;
2134                ep->qp.ctx_base = NULL;
2135        }
2136        wake_up_interruptible(&ep->ofld_wait);
2137}
2138
2139/**
2140 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2141 * @hba:                adapter structure pointer
2142 * @update_kcqe:        kcqe pointer
2143 *
2144 * Generic KCQ event handler/dispatcher
2145 */
2146static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2147                                u32 num_cqe)
2148{
2149        struct bnx2i_hba *hba = context;
2150        int i = 0;
2151        struct iscsi_kcqe *ikcqe = NULL;
2152
2153        while (i < num_cqe) {
2154                ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2155
2156                if (ikcqe->op_code ==
2157                    ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2158                        bnx2i_fastpath_notification(hba, ikcqe);
2159                else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2160                        bnx2i_process_ofld_cmpl(hba, ikcqe);
2161                else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2162                        bnx2i_process_update_conn_cmpl(hba, ikcqe);
2163                else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2164                        if (ikcqe->completion_status !=
2165                            ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2166                                bnx2i_iscsi_license_error(hba, ikcqe->\
2167                                                          completion_status);
2168                        else {
2169                                set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2170                                bnx2i_get_link_state(hba);
2171                                printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2172                                                 "ISCSI_INIT passed\n",
2173                                                 (u8)hba->pcidev->bus->number,
2174                                                 hba->pci_devno,
2175                                                 (u8)hba->pci_func);
2176
2177
2178                        }
2179                } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2180                        bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2181                else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2182                        bnx2i_process_iscsi_error(hba, ikcqe);
2183                else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2184                        bnx2i_process_tcp_error(hba, ikcqe);
2185                else
2186                        printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2187                                          ikcqe->op_code);
2188        }
2189}
2190
2191
2192/**
2193 * bnx2i_indicate_netevent - Generic netdev event handler
2194 * @context:    adapter structure pointer
2195 * @event:      event type
2196 *
2197 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2198 *      NETDEV_GOING_DOWN and NETDEV_CHANGE
2199 */
2200static void bnx2i_indicate_netevent(void *context, unsigned long event)
2201{
2202        struct bnx2i_hba *hba = context;
2203
2204        switch (event) {
2205        case NETDEV_UP:
2206                if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2207                        bnx2i_send_fw_iscsi_init_msg(hba);
2208                break;
2209        case NETDEV_DOWN:
2210                clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2211                clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2212                break;
2213        case NETDEV_GOING_DOWN:
2214                set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2215                iscsi_host_for_each_session(hba->shost,
2216                                            bnx2i_drop_session);
2217                break;
2218        case NETDEV_CHANGE:
2219                bnx2i_get_link_state(hba);
2220                break;
2221        default:
2222                ;
2223        }
2224}
2225
2226
2227/**
2228 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2229 * @cm_sk:              cnic sock structure pointer
2230 *
2231 * function callback exported via bnx2i - cnic driver interface to
2232 *      indicate completion of option-2 TCP connect request.
2233 */
2234static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2235{
2236        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2237
2238        if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2239                ep->state = EP_STATE_CONNECT_FAILED;
2240        else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2241                ep->state = EP_STATE_CONNECT_COMPL;
2242        else
2243                ep->state = EP_STATE_CONNECT_FAILED;
2244
2245        wake_up_interruptible(&ep->ofld_wait);
2246}
2247
2248
2249/**
2250 * bnx2i_cm_close_cmpl - process tcp conn close completion
2251 * @cm_sk:      cnic sock structure pointer
2252 *
2253 * function callback exported via bnx2i - cnic driver interface to
2254 *      indicate completion of option-2 graceful TCP connect shutdown
2255 */
2256static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2257{
2258        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2259
2260        ep->state = EP_STATE_DISCONN_COMPL;
2261        wake_up_interruptible(&ep->ofld_wait);
2262}
2263
2264
2265/**
2266 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2267 * @cm_sk:      cnic sock structure pointer
2268 *
2269 * function callback exported via bnx2i - cnic driver interface to
2270 *      indicate completion of option-2 abortive TCP connect termination
2271 */
2272static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2273{
2274        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2275
2276        ep->state = EP_STATE_DISCONN_COMPL;
2277        wake_up_interruptible(&ep->ofld_wait);
2278}
2279
2280
2281/**
2282 * bnx2i_cm_remote_close - process received TCP FIN
2283 * @hba:                adapter structure pointer
2284 * @update_kcqe:        kcqe pointer
2285 *
2286 * function callback exported via bnx2i - cnic driver interface to indicate
2287 *      async TCP events such as FIN
2288 */
2289static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2290{
2291        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2292
2293        ep->state = EP_STATE_TCP_FIN_RCVD;
2294        if (ep->conn)
2295                bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2296}
2297
2298/**
2299 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2300 * @hba:                adapter structure pointer
2301 * @update_kcqe:        kcqe pointer
2302 *
2303 * function callback exported via bnx2i - cnic driver interface to
2304 *      indicate async TCP events (RST) sent by the peer.
2305 */
2306static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2307{
2308        struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2309
2310        ep->state = EP_STATE_TCP_RST_RCVD;
2311        if (ep->conn)
2312                bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2313}
2314
2315
2316static void bnx2i_send_nl_mesg(struct cnic_dev *dev, u32 msg_type,
2317                               char *buf, u16 buflen)
2318{
2319        struct bnx2i_hba *hba;
2320
2321        hba = bnx2i_find_hba_for_cnic(dev);
2322        if (!hba)
2323                return;
2324
2325        if (iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2326                                   msg_type, buf, buflen))
2327                printk(KERN_ALERT "bnx2i: private nl message send error\n");
2328
2329}
2330
2331
2332/**
2333 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2334 *                      carrying callback function pointers
2335 *
2336 */
2337struct cnic_ulp_ops bnx2i_cnic_cb = {
2338        .cnic_init = bnx2i_ulp_init,
2339        .cnic_exit = bnx2i_ulp_exit,
2340        .cnic_start = bnx2i_start,
2341        .cnic_stop = bnx2i_stop,
2342        .indicate_kcqes = bnx2i_indicate_kcqe,
2343        .indicate_netevent = bnx2i_indicate_netevent,
2344        .cm_connect_complete = bnx2i_cm_connect_cmpl,
2345        .cm_close_complete = bnx2i_cm_close_cmpl,
2346        .cm_abort_complete = bnx2i_cm_abort_cmpl,
2347        .cm_remote_close = bnx2i_cm_remote_close,
2348        .cm_remote_abort = bnx2i_cm_remote_abort,
2349        .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2350        .owner = THIS_MODULE
2351};
2352
2353
2354/**
2355 * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2356 * @ep: bnx2i endpoint
2357 *
2358 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2359 *      register in BAR #0. Whereas in 57710 these register are accessed by
2360 *      mapping BAR #1
2361 */
2362int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2363{
2364        u32 cid_num;
2365        u32 reg_off;
2366        u32 first_l4l5;
2367        u32 ctx_sz;
2368        u32 config2;
2369        resource_size_t reg_base;
2370
2371        cid_num = bnx2i_get_cid_num(ep);
2372
2373        if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2374                reg_base = pci_resource_start(ep->hba->pcidev,
2375                                              BNX2X_DOORBELL_PCI_BAR);
2376                reg_off = PAGE_SIZE * (cid_num & 0x1FFFF) + DPM_TRIGER_TYPE;
2377                ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
2378                goto arm_cq;
2379        }
2380
2381        reg_base = ep->hba->netdev->base_addr;
2382        if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2383            (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2384                config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2385                first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2386                ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2387                if (ctx_sz)
2388                        reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2389                                  + BNX2I_570X_PAGE_SIZE_DEFAULT *
2390                                  (((cid_num - first_l4l5) / ctx_sz) + 256);
2391                else
2392                        reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2393        } else
2394                /* 5709 device in normal node and 5706/5708 devices */
2395                reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2396
2397        ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off,
2398                                          MB_KERNEL_CTX_SIZE);
2399        if (!ep->qp.ctx_base)
2400                return -ENOMEM;
2401
2402arm_cq:
2403        bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2404        return 0;
2405}
2406