drivers/scsi/bnx2i/bnx2i_hwi.c

   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 <linux/gfp.h>
  15 #include <scsi/scsi_tcq.h>
  16 #include <scsi/libiscsi.h>
  17 #include "bnx2i.h"
  18
  19 /**
  20  * bnx2i_get_cid_num - get cid from ep
  21  * @ep:         endpoint pointer
  22  *
  23  * Only applicable to 57710 family of devices
  24  */
  25 static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
  26 {
  27         u32 cid;
  28
  29         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
  30                 cid = ep->ep_cid;
  31         else
  32                 cid = GET_CID_NUM(ep->ep_cid);
  33         return cid;
  34 }
  35
  36
  37 /**
  38  * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
  39  * @hba:                Adapter for which adjustments is to be made
  40  *
  41  * Only applicable to 57710 family of devices
  42  */
  43 static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
  44 {
  45         u32 num_elements_per_pg;
  46
  47         if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
  48             test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
  49             test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
  50                 if (!is_power_of_2(hba->max_sqes))
  51                         hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);
  52
  53                 if (!is_power_of_2(hba->max_rqes))
  54                         hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
  55         }
  56
  57         /* Adjust each queue size if the user selection does not
  58          * yield integral num of page buffers
  59          */
  60         /* adjust SQ */
  61         num_elements_per_pg = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
  62         if (hba->max_sqes < num_elements_per_pg)
  63                 hba->max_sqes = num_elements_per_pg;
  64         else if (hba->max_sqes % num_elements_per_pg)
  65                 hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
  66                                  ~(num_elements_per_pg - 1);
  67
  68         /* adjust CQ */
  69         num_elements_per_pg = PAGE_SIZE / BNX2I_CQE_SIZE;
  70         if (hba->max_cqes < num_elements_per_pg)
  71                 hba->max_cqes = num_elements_per_pg;
  72         else if (hba->max_cqes % num_elements_per_pg)
  73                 hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
  74                                  ~(num_elements_per_pg - 1);
  75
  76         /* adjust RQ */
  77         num_elements_per_pg = PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
  78         if (hba->max_rqes < num_elements_per_pg)
  79                 hba->max_rqes = num_elements_per_pg;
  80         else if (hba->max_rqes % num_elements_per_pg)
  81                 hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
  82                                  ~(num_elements_per_pg - 1);
  83 }
  84
  85
  86 /**
  87  * bnx2i_get_link_state - get network interface link state
  88  * @hba:        adapter instance pointer
  89  *
  90  * updates adapter structure flag based on netdev state
  91  */
  92 static void bnx2i_get_link_state(struct bnx2i_hba *hba)
  93 {
  94         if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
  95                 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
  96         else
  97                 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
  98 }
  99
 100
 101 /**
 102  * bnx2i_iscsi_license_error - displays iscsi license related error message
 103  * @hba:                adapter instance pointer
 104  * @error_code:         error classification
 105  *
 106  * Puts out an error log when driver is unable to offload iscsi connection
 107  *      due to license restrictions
 108  */
 109 static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
 110 {
 111         if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
 112                 /* iSCSI offload not supported on this device */
 113                 printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
 114                                 hba->netdev->name);
 115         if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
 116                 /* iSCSI offload not supported on this LOM device */
 117                 printk(KERN_ERR "bnx2i: LOM is not enable to "
 118                                 "offload iSCSI connections, dev=%s\n",
 119                                 hba->netdev->name);
 120         set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
 121 }
 122
 123
 124 /**
 125  * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
 126  * @ep:         endpoint (transport indentifier) structure
 127  * @action:     action, ARM or DISARM. For now only ARM_CQE is used
 128  *
 129  * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
 130  *      the driver. EQ event is generated CQ index is hit or at least 1 CQ is
 131  *      outstanding and on chip timer expires
 132  */
 133 void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
 134 {
 135         struct bnx2i_5771x_cq_db *cq_db;
 136         u16 cq_index;
 137         u16 next_index;
 138         u32 num_active_cmds;
 139
 140
 141         /* Coalesce CQ entries only on 10G devices */
 142         if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 143                 return;
 144
 145         /* Do not update CQ DB multiple times before firmware writes
 146          * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
 147          * interrupts and other unwanted results
 148          */
 149         cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
 150         if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
 151                 return;
 152
 153         if (action == CNIC_ARM_CQE) {
 154                 num_active_cmds = ep->num_active_cmds;
 155                 if (num_active_cmds <= event_coal_min)
 156                         next_index = 1;
 157                 else
 158                         next_index = event_coal_min +
 159                                 (num_active_cmds - event_coal_min) / event_coal_div;
 160                 if (!next_index)
 161                         next_index = 1;
 162                 cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;
 163                 if (cq_index > ep->qp.cqe_size * 2)
 164                         cq_index -= ep->qp.cqe_size * 2;
 165                 if (!cq_index)
 166                         cq_index = 1;
 167
 168                 cq_db->sqn[0] = cq_index;
 169         }
 170 }
 171
 172
 173 /**
 174  * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
 175  * @conn:               iscsi connection on which RQ event occured
 176  * @ptr:                driver buffer to which RQ buffer contents is to
 177  *                      be copied
 178  * @len:                length of valid data inside RQ buf
 179  *
 180  * Copies RQ buffer contents from shared (DMA'able) memory region to
 181  *      driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
 182  *      scsi sense info
 183  */
 184 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
 185 {
 186         if (!bnx2i_conn->ep->qp.rqe_left)
 187                 return;
 188
 189         bnx2i_conn->ep->qp.rqe_left--;
 190         memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
 191         if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
 192                 bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
 193                 bnx2i_conn->ep->qp.rq_cons_idx = 0;
 194         } else {
 195                 bnx2i_conn->ep->qp.rq_cons_qe++;
 196                 bnx2i_conn->ep->qp.rq_cons_idx++;
 197         }
 198 }
 199
 200
 201 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
 202 {
 203         struct bnx2i_5771x_dbell dbell;
 204         u32 msg;
 205
 206         memset(&dbell, 0, sizeof(dbell));
 207         dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
 208                               B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
 209         msg = *((u32 *)&dbell);
 210         /* TODO : get doorbell register mapping */
 211         writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
 212 }
 213
 214
 215 /**
 216  * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
 217  * @conn:       iscsi connection on which event to post
 218  * @count:      number of RQ buffer being posted to chip
 219  *
 220  * No need to ring hardware doorbell for 57710 family of devices
 221  */
 222 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
 223 {
 224         struct bnx2i_5771x_sq_rq_db *rq_db;
 225         u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
 226         struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 227
 228         ep->qp.rqe_left += count;
 229         ep->qp.rq_prod_idx &= 0x7FFF;
 230         ep->qp.rq_prod_idx += count;
 231
 232         if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
 233                 ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
 234                 if (!hi_bit)
 235                         ep->qp.rq_prod_idx |= 0x8000;
 236         } else
 237                 ep->qp.rq_prod_idx |= hi_bit;
 238
 239         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 240                 rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
 241                 rq_db->prod_idx = ep->qp.rq_prod_idx;
 242                 /* no need to ring hardware doorbell for 57710 */
 243         } else {
 244                 writew(ep->qp.rq_prod_idx,
 245                        ep->qp.ctx_base + CNIC_RECV_DOORBELL);
 246         }
 247         mmiowb();
 248 }
 249
 250
 251 /**
 252  * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
 253  * @conn:               iscsi connection to which new SQ entries belong
 254  * @count:              number of SQ WQEs to post
 255  *
 256  * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
 257  *      of devices. For 5706/5708/5709 new SQ WQE count is written into the
 258  *      doorbell register
 259  */
 260 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
 261 {
 262         struct bnx2i_5771x_sq_rq_db *sq_db;
 263         struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 264
 265         ep->num_active_cmds++;
 266         wmb();  /* flush SQ WQE memory before the doorbell is rung */
 267         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 268                 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
 269                 sq_db->prod_idx = ep->qp.sq_prod_idx;
 270                 bnx2i_ring_577xx_doorbell(bnx2i_conn);
 271         } else
 272                 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
 273
 274         mmiowb(); /* flush posted PCI writes */
 275 }
 276
 277
 278 /**
 279  * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
 280  * @conn:       iscsi connection to which new SQ entries belong
 281  * @count:      number of SQ WQEs to post
 282  *
 283  * this routine will update SQ driver parameters and ring the doorbell
 284  */
 285 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
 286                                               int count)
 287 {
 288         int tmp_cnt;
 289
 290         if (count == 1) {
 291                 if (bnx2i_conn->ep->qp.sq_prod_qe ==
 292                     bnx2i_conn->ep->qp.sq_last_qe)
 293                         bnx2i_conn->ep->qp.sq_prod_qe =
 294                                                 bnx2i_conn->ep->qp.sq_first_qe;
 295                 else
 296                         bnx2i_conn->ep->qp.sq_prod_qe++;
 297         } else {
 298                 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
 299                     bnx2i_conn->ep->qp.sq_last_qe)
 300                         bnx2i_conn->ep->qp.sq_prod_qe += count;
 301                 else {
 302                         tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
 303                                 bnx2i_conn->ep->qp.sq_prod_qe;
 304                         bnx2i_conn->ep->qp.sq_prod_qe =
 305                                 &bnx2i_conn->ep->qp.sq_first_qe[count -
 306                                                                 (tmp_cnt + 1)];
 307                 }
 308         }
 309         bnx2i_conn->ep->qp.sq_prod_idx += count;
 310         /* Ring the doorbell */
 311         bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
 312 }
 313
 314
 315 /**
 316  * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
 317  * @conn:       iscsi connection
 318  * @cmd:        driver command structure which is requesting
 319  *              a WQE to sent to chip for further processing
 320  *
 321  * prepare and post an iSCSI Login request WQE to CNIC firmware
 322  */
 323 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
 324                            struct iscsi_task *task)
 325 {
 326         struct bnx2i_cmd *bnx2i_cmd;
 327         struct bnx2i_login_request *login_wqe;
 328         struct iscsi_login *login_hdr;
 329         u32 dword;
 330
 331         bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 332         login_hdr = (struct iscsi_login *)task->hdr;
 333         login_wqe = (struct bnx2i_login_request *)
 334                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 335
 336         login_wqe->op_code = login_hdr->opcode;
 337         login_wqe->op_attr = login_hdr->flags;
 338         login_wqe->version_max = login_hdr->max_version;
 339         login_wqe->version_min = login_hdr->min_version;
 340         login_wqe->data_length = ntoh24(login_hdr->dlength);
 341         login_wqe->isid_lo = *((u32 *) login_hdr->isid);
 342         login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
 343         login_wqe->tsih = login_hdr->tsih;
 344         login_wqe->itt = task->itt |
 345                 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
 346         login_wqe->cid = login_hdr->cid;
 347
 348         login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
 349         login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
 350         login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;
 351
 352         login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
 353         login_wqe->resp_bd_list_addr_hi =
 354                 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
 355
 356         dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
 357                  (bnx2i_conn->gen_pdu.resp_buf_size <<
 358                   ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
 359         login_wqe->resp_buffer = dword;
 360         login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
 361         login_wqe->bd_list_addr_hi =
 362                 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
 363         login_wqe->num_bds = 1;
 364         login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 365
 366         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 367         return 0;
 368 }
 369
 370 /**
 371  * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
 372  * @conn:       iscsi connection
 373  * @mtask:      driver command structure which is requesting
 374  *              a WQE to sent to chip for further processing
 375  *
 376  * prepare and post an iSCSI Login request WQE to CNIC firmware
 377  */
 378 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
 379                          struct iscsi_task *mtask)
 380 {
 381         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
 382         struct iscsi_tm *tmfabort_hdr;
 383         struct scsi_cmnd *ref_sc;
 384         struct iscsi_task *ctask;
 385         struct bnx2i_cmd *bnx2i_cmd;
 386         struct bnx2i_tmf_request *tmfabort_wqe;
 387         u32 dword;
 388         u32 scsi_lun[2];
 389
 390         bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
 391         tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
 392         tmfabort_wqe = (struct bnx2i_tmf_request *)
 393                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 394
 395         tmfabort_wqe->op_code = tmfabort_hdr->opcode;
 396         tmfabort_wqe->op_attr = 0;
 397         tmfabort_wqe->op_attr =
 398                 ISCSI_TMF_REQUEST_ALWAYS_ONE | ISCSI_TM_FUNC_ABORT_TASK;
 399
 400         tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
 401         tmfabort_wqe->reserved2 = 0;
 402         tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
 403
 404         ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
 405         if (!ctask || !ctask->sc)
 406                 /*
 407                  * the iscsi layer must have completed the cmd while this
 408                  * was starting up.
 409                  *
 410                  * Note: In the case of a SCSI cmd timeout, the task's sc
 411                  *       is still active; hence ctask->sc != 0
 412                  *       In this case, the task must be aborted
 413                  */
 414                 return 0;
 415
 416         ref_sc = ctask->sc;
 417
 418         /* Retrieve LUN directly from the ref_sc */
 419         int_to_scsilun(ref_sc->device->lun, (struct scsi_lun *) scsi_lun);
 420         tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
 421         tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
 422
 423         if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
 424                 dword = (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
 425         else
 426                 dword = (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
 427         tmfabort_wqe->ref_itt = (dword | (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
 428         tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
 429
 430         tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
 431         tmfabort_wqe->bd_list_addr_hi = (u32)
 432                                 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 433         tmfabort_wqe->num_bds = 1;
 434         tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 435
 436         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 437         return 0;
 438 }
 439
 440 /**
 441  * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
 442  * @conn:       iscsi connection
 443  * @cmd:        driver command structure which is requesting
 444  *              a WQE to sent to chip for further processing
 445  *
 446  * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
 447  */
 448 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
 449                              struct bnx2i_cmd *cmd)
 450 {
 451         struct bnx2i_cmd_request *scsi_cmd_wqe;
 452
 453         scsi_cmd_wqe = (struct bnx2i_cmd_request *)
 454                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 455         memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
 456         scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 457
 458         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 459         return 0;
 460 }
 461
 462 /**
 463  * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
 464  * @conn:               iscsi connection
 465  * @cmd:                driver command structure which is requesting
 466  *                      a WQE to sent to chip for further processing
 467  * @ttt:                TTT to be used when building pdu header
 468  * @datap:              payload buffer pointer
 469  * @data_len:           payload data length
 470  * @unsol:              indicated whether nopout pdu is unsolicited pdu or
 471  *                      in response to target's NOPIN w/ TTT != FFFFFFFF
 472  *
 473  * prepare and post a nopout request WQE to CNIC firmware
 474  */
 475 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
 476                             struct iscsi_task *task, u32 ttt,
 477                             char *datap, int data_len, int unsol)
 478 {
 479         struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 480         struct bnx2i_cmd *bnx2i_cmd;
 481         struct bnx2i_nop_out_request *nopout_wqe;
 482         struct iscsi_nopout *nopout_hdr;
 483
 484         bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 485         nopout_hdr = (struct iscsi_nopout *)task->hdr;
 486         nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
 487         nopout_wqe->op_code = nopout_hdr->opcode;
 488         nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
 489         memcpy(nopout_wqe->lun, nopout_hdr->lun, 8);
 490
 491         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 492                 u32 tmp = nopout_hdr->lun[0];
 493                 /* 57710 requires LUN field to be swapped */
 494                 nopout_hdr->lun[0] = nopout_hdr->lun[1];
 495                 nopout_hdr->lun[1] = tmp;
 496         }
 497
 498         nopout_wqe->itt = ((u16)task->itt |
 499                            (ISCSI_TASK_TYPE_MPATH <<
 500                             ISCSI_TMF_REQUEST_TYPE_SHIFT));
 501         nopout_wqe->ttt = ttt;
 502         nopout_wqe->flags = 0;
 503         if (!unsol)
 504                 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
 505         else if (nopout_hdr->itt == RESERVED_ITT)
 506                 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
 507
 508         nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
 509         nopout_wqe->data_length = data_len;
 510         if (data_len) {
 511                 /* handle payload data, not required in first release */
 512                 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
 513         } else {
 514                 nopout_wqe->bd_list_addr_lo = (u32)
 515                                         bnx2i_conn->hba->mp_bd_dma;
 516                 nopout_wqe->bd_list_addr_hi =
 517                         (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 518                 nopout_wqe->num_bds = 1;
 519         }
 520         nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 521
 522         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 523         return 0;
 524 }
 525
 526
 527 /**
 528  * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
 529  * @conn:       iscsi connection
 530  * @cmd:        driver command structure which is requesting
 531  *              a WQE to sent to chip for further processing
 532  *
 533  * prepare and post logout request WQE to CNIC firmware
 534  */
 535 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
 536                             struct iscsi_task *task)
 537 {
 538         struct bnx2i_cmd *bnx2i_cmd;
 539         struct bnx2i_logout_request *logout_wqe;
 540         struct iscsi_logout *logout_hdr;
 541
 542         bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 543         logout_hdr = (struct iscsi_logout *)task->hdr;
 544
 545         logout_wqe = (struct bnx2i_logout_request *)
 546                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 547         memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
 548
 549         logout_wqe->op_code = logout_hdr->opcode;
 550         logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
 551         logout_wqe->op_attr =
 552                         logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
 553         logout_wqe->itt = ((u16)task->itt |
 554                            (ISCSI_TASK_TYPE_MPATH <<
 555                             ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
 556         logout_wqe->data_length = 0;
 557         logout_wqe->cid = 0;
 558
 559         logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
 560         logout_wqe->bd_list_addr_hi = (u32)
 561                                 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 562         logout_wqe->num_bds = 1;
 563         logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 564
 565         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 566         return 0;
 567 }
 568
 569
 570 /**
 571  * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
 572  * @conn:       iscsi connection which requires iscsi parameter update
 573  *
 574  * sends down iSCSI Conn Update request to move iSCSI conn to FFP
 575  */
 576 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
 577 {
 578         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
 579         struct bnx2i_hba *hba = bnx2i_conn->hba;
 580         struct kwqe *kwqe_arr[2];
 581         struct iscsi_kwqe_conn_update *update_wqe;
 582         struct iscsi_kwqe_conn_update conn_update_kwqe;
 583
 584         update_wqe = &conn_update_kwqe;
 585
 586         update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
 587         update_wqe->hdr.flags =
 588                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 589
 590         /* 5771x requires conn context id to be passed as is */
 591         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
 592                 update_wqe->context_id = bnx2i_conn->ep->ep_cid;
 593         else
 594                 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
 595         update_wqe->conn_flags = 0;
 596         if (conn->hdrdgst_en)
 597                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
 598         if (conn->datadgst_en)
 599                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
 600         if (conn->session->initial_r2t_en)
 601                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
 602         if (conn->session->imm_data_en)
 603                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
 604
 605         update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
 606         update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
 607         update_wqe->first_burst_length = conn->session->first_burst;
 608         update_wqe->max_burst_length = conn->session->max_burst;
 609         update_wqe->exp_stat_sn = conn->exp_statsn;
 610         update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
 611         update_wqe->session_error_recovery_level = conn->session->erl;
 612         iscsi_conn_printk(KERN_ALERT, conn,
 613                           "bnx2i: conn update - MBL 0x%x FBL 0x%x"
 614                           "MRDSL_I 0x%x MRDSL_T 0x%x \n",
 615                           update_wqe->max_burst_length,
 616                           update_wqe->first_burst_length,
 617                           update_wqe->max_recv_pdu_length,
 618                           update_wqe->max_send_pdu_length);
 619
 620         kwqe_arr[0] = (struct kwqe *) update_wqe;
 621         if (hba->cnic && hba->cnic->submit_kwqes)
 622                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
 623 }
 624
 625
 626 /**
 627  * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
 628  * @data:       endpoint (transport handle) structure pointer
 629  *
 630  * routine to handle connection offload/destroy request timeout
 631  */
 632 void bnx2i_ep_ofld_timer(unsigned long data)
 633 {
 634         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;
 635
 636         if (ep->state == EP_STATE_OFLD_START) {
 637                 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
 638                 ep->state = EP_STATE_OFLD_FAILED;
 639         } else if (ep->state == EP_STATE_DISCONN_START) {
 640                 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
 641                 ep->state = EP_STATE_DISCONN_TIMEDOUT;
 642         } else if (ep->state == EP_STATE_CLEANUP_START) {
 643                 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
 644                 ep->state = EP_STATE_CLEANUP_FAILED;
 645         }
 646
 647         wake_up_interruptible(&ep->ofld_wait);
 648 }
 649
 650
 651 static int bnx2i_power_of2(u32 val)
 652 {
 653         u32 power = 0;
 654         if (val & (val - 1))
 655                 return power;
 656         val--;
 657         while (val) {
 658                 val = val >> 1;
 659                 power++;
 660         }
 661         return power;
 662 }
 663
 664
 665 /**
 666  * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
 667  * @hba:        adapter structure pointer
 668  * @cmd:        driver command structure which is requesting
 669  *              a WQE to sent to chip for further processing
 670  *
 671  * prepares and posts CONN_OFLD_REQ1/2 KWQE
 672  */
 673 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
 674 {
 675         struct bnx2i_cleanup_request *cmd_cleanup;
 676
 677         cmd_cleanup =
 678                 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
 679         memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
 680
 681         cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
 682         cmd_cleanup->itt = cmd->req.itt;
 683         cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
 684
 685         bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
 686 }
 687
 688
 689 /**
 690  * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
 691  * @hba:        adapter structure pointer
 692  * @ep:         endpoint (transport indentifier) structure
 693  *
 694  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
 695  *      iscsi connection context clean-up process
 696  */
 697 void bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 698 {
 699         struct kwqe *kwqe_arr[2];
 700         struct iscsi_kwqe_conn_destroy conn_cleanup;
 701
 702         memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
 703
 704         conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
 705         conn_cleanup.hdr.flags =
 706                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 707         /* 5771x requires conn context id to be passed as is */
 708         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 709                 conn_cleanup.context_id = ep->ep_cid;
 710         else
 711                 conn_cleanup.context_id = (ep->ep_cid >> 7);
 712
 713         conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
 714
 715         kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
 716         if (hba->cnic && hba->cnic->submit_kwqes)
 717                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
 718 }
 719
 720
 721 /**
 722  * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
 723  * @hba:                adapter structure pointer
 724  * @ep:                 endpoint (transport indentifier) structure
 725  *
 726  * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 727  */
 728 static void bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
 729                                           struct bnx2i_endpoint *ep)
 730 {
 731         struct kwqe *kwqe_arr[2];
 732         struct iscsi_kwqe_conn_offload1 ofld_req1;
 733         struct iscsi_kwqe_conn_offload2 ofld_req2;
 734         dma_addr_t dma_addr;
 735         int num_kwqes = 2;
 736         u32 *ptbl;
 737
 738         ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
 739         ofld_req1.hdr.flags =
 740                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 741
 742         ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
 743
 744         dma_addr = ep->qp.sq_pgtbl_phys;
 745         ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
 746         ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 747
 748         dma_addr = ep->qp.cq_pgtbl_phys;
 749         ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
 750         ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 751
 752         ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
 753         ofld_req2.hdr.flags =
 754                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 755
 756         dma_addr = ep->qp.rq_pgtbl_phys;
 757         ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
 758         ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 759
 760         ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
 761
 762         ofld_req2.sq_first_pte.hi = *ptbl++;
 763         ofld_req2.sq_first_pte.lo = *ptbl;
 764
 765         ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
 766         ofld_req2.cq_first_pte.hi = *ptbl++;
 767         ofld_req2.cq_first_pte.lo = *ptbl;
 768
 769         kwqe_arr[0] = (struct kwqe *) &ofld_req1;
 770         kwqe_arr[1] = (struct kwqe *) &ofld_req2;
 771         ofld_req2.num_additional_wqes = 0;
 772
 773         if (hba->cnic && hba->cnic->submit_kwqes)
 774                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
 775 }
 776
 777
 778 /**
 779  * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
 780  * @hba:                adapter structure pointer
 781  * @ep:                 endpoint (transport indentifier) structure
 782  *
 783  * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 784  */
 785 static void bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
 786                                            struct bnx2i_endpoint *ep)
 787 {
 788         struct kwqe *kwqe_arr[5];
 789         struct iscsi_kwqe_conn_offload1 ofld_req1;
 790         struct iscsi_kwqe_conn_offload2 ofld_req2;
 791         struct iscsi_kwqe_conn_offload3 ofld_req3[1];
 792         dma_addr_t dma_addr;
 793         int num_kwqes = 2;
 794         u32 *ptbl;
 795
 796         ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
 797         ofld_req1.hdr.flags =
 798                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 799
 800         ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
 801
 802         dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
 803         ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
 804         ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 805
 806         dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
 807         ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
 808         ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 809
 810         ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
 811         ofld_req2.hdr.flags =
 812                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 813
 814         dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
 815         ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
 816         ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 817
 818         ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
 819         ofld_req2.sq_first_pte.hi = *ptbl++;
 820         ofld_req2.sq_first_pte.lo = *ptbl;
 821
 822         ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
 823         ofld_req2.cq_first_pte.hi = *ptbl++;
 824         ofld_req2.cq_first_pte.lo = *ptbl;
 825
 826         kwqe_arr[0] = (struct kwqe *) &ofld_req1;
 827         kwqe_arr[1] = (struct kwqe *) &ofld_req2;
 828
 829         ofld_req2.num_additional_wqes = 1;
 830         memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
 831         ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
 832         ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
 833         ofld_req3[0].qp_first_pte[0].lo = *ptbl;
 834
 835         kwqe_arr[2] = (struct kwqe *) ofld_req3;
 836         /* need if we decide to go with multiple KCQE's per conn */
 837         num_kwqes += 1;
 838
 839         if (hba->cnic && hba->cnic->submit_kwqes)
 840                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
 841 }
 842
 843 /**
 844  * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
 845  *
 846  * @hba:                adapter structure pointer
 847  * @ep:                 endpoint (transport indentifier) structure
 848  *
 849  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
 850  */
 851 void bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 852 {
 853         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
 854                 bnx2i_5771x_send_conn_ofld_req(hba, ep);
 855         else
 856                 bnx2i_570x_send_conn_ofld_req(hba, ep);
 857 }
 858
 859
 860 /**
 861  * setup_qp_page_tables - iscsi QP page table setup function
 862  * @ep:         endpoint (transport indentifier) structure
 863  *
 864  * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
 865  *      64-bit address in big endian format. Whereas 10G/sec (57710) requires
 866  *      PT in little endian format
 867  */
 868 static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
 869 {
 870         int num_pages;
 871         u32 *ptbl;
 872         dma_addr_t page;
 873         int cnic_dev_10g;
 874
 875         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 876                 cnic_dev_10g = 1;
 877         else
 878                 cnic_dev_10g = 0;
 879
 880         /* SQ page table */
 881         memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
 882         num_pages = ep->qp.sq_mem_size / PAGE_SIZE;
 883         page = ep->qp.sq_phys;
 884
 885         if (cnic_dev_10g)
 886                 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
 887         else
 888                 ptbl = (u32 *) ep->qp.sq_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         /* RQ page table */
 909         memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
 910         num_pages = ep->qp.rq_mem_size / PAGE_SIZE;
 911         page = ep->qp.rq_phys;
 912
 913         if (cnic_dev_10g)
 914                 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
 915         else
 916                 ptbl = (u32 *) ep->qp.rq_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         /* CQ page table */
 937         memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
 938         num_pages = ep->qp.cq_mem_size / PAGE_SIZE;
 939         page = ep->qp.cq_phys;
 940
 941         if (cnic_dev_10g)
 942                 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
 943         else
 944                 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
 945         while (num_pages--) {
 946                 if (cnic_dev_10g) {
 947                         /* PTE is written in little endian format for 57710 */
 948                         *ptbl = (u32) page;
 949                         ptbl++;
 950                         *ptbl = (u32) ((u64) page >> 32);
 951                         ptbl++;
 952                         page += PAGE_SIZE;
 953                 } else {
 954                         /* PTE is written in big endian format for
 955                          * 5706/5708/5709 devices */
 956                         *ptbl = (u32) ((u64) page >> 32);
 957                         ptbl++;
 958                         *ptbl = (u32) page;
 959                         ptbl++;
 960                         page += PAGE_SIZE;
 961                 }
 962         }
 963 }
 964
 965
 966 /**
 967  * bnx2i_alloc_qp_resc - allocates required resources for QP.
 968  * @hba:        adapter structure pointer
 969  * @ep:         endpoint (transport indentifier) structure
 970  *
 971  * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
 972  *      memory for SQ/RQ/CQ and page tables. EP structure elements such
 973  *      as producer/consumer indexes/pointers, queue sizes and page table
 974  *      contents are setup
 975  */
 976 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 977 {
 978         struct bnx2i_5771x_cq_db *cq_db;
 979
 980         ep->hba = hba;
 981         ep->conn = NULL;
 982         ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
 983
 984         /* Allocate page table memory for SQ which is page aligned */
 985         ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
 986         ep->qp.sq_mem_size =
 987                 (ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 988         ep->qp.sq_pgtbl_size =
 989                 (ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *);
 990         ep->qp.sq_pgtbl_size =
 991                 (ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 992
 993         ep->qp.sq_pgtbl_virt =
 994                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
 995                                    &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
 996         if (!ep->qp.sq_pgtbl_virt) {
 997                 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
 998                                   ep->qp.sq_pgtbl_size);
 999                 goto mem_alloc_err;
1000         }
1001
1002         /* Allocate memory area for actual SQ element */
1003         ep->qp.sq_virt =
1004                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1005                                    &ep->qp.sq_phys, GFP_KERNEL);
1006         if (!ep->qp.sq_virt) {
1007                 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1008                                   ep->qp.sq_mem_size);
1009                 goto mem_alloc_err;
1010         }
1011
1012         memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
1013         ep->qp.sq_first_qe = ep->qp.sq_virt;
1014         ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1015         ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1016         ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1017         ep->qp.sq_prod_idx = 0;
1018         ep->qp.sq_cons_idx = 0;
1019         ep->qp.sqe_left = hba->max_sqes;
1020
1021         /* Allocate page table memory for CQ which is page aligned */
1022         ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1023         ep->qp.cq_mem_size =
1024                 (ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1025         ep->qp.cq_pgtbl_size =
1026                 (ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *);
1027         ep->qp.cq_pgtbl_size =
1028                 (ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1029
1030         ep->qp.cq_pgtbl_virt =
1031                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1032                                    &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1033         if (!ep->qp.cq_pgtbl_virt) {
1034                 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1035                                   ep->qp.cq_pgtbl_size);
1036                 goto mem_alloc_err;
1037         }
1038
1039         /* Allocate memory area for actual CQ element */
1040         ep->qp.cq_virt =
1041                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1042                                    &ep->qp.cq_phys, GFP_KERNEL);
1043         if (!ep->qp.cq_virt) {
1044                 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1045                                   ep->qp.cq_mem_size);
1046                 goto mem_alloc_err;
1047         }
1048         memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
1049
1050         ep->qp.cq_first_qe = ep->qp.cq_virt;
1051         ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1052         ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1053         ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1054         ep->qp.cq_prod_idx = 0;
1055         ep->qp.cq_cons_idx = 0;
1056         ep->qp.cqe_left = hba->max_cqes;
1057         ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1058         ep->qp.cqe_size = hba->max_cqes;
1059
1060         /* Invalidate all EQ CQE index, req only for 57710 */
1061         cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1062         memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1063
1064         /* Allocate page table memory for RQ which is page aligned */
1065         ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1066         ep->qp.rq_mem_size =
1067                 (ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1068         ep->qp.rq_pgtbl_size =
1069                 (ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *);
1070         ep->qp.rq_pgtbl_size =
1071                 (ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1072
1073         ep->qp.rq_pgtbl_virt =
1074                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1075                                    &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1076         if (!ep->qp.rq_pgtbl_virt) {
1077                 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1078                                   ep->qp.rq_pgtbl_size);
1079                 goto mem_alloc_err;
1080         }
1081
1082         /* Allocate memory area for actual RQ element */
1083         ep->qp.rq_virt =
1084                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1085                                    &ep->qp.rq_phys, GFP_KERNEL);
1086         if (!ep->qp.rq_virt) {
1087                 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1088                                   ep->qp.rq_mem_size);
1089                 goto mem_alloc_err;
1090         }
1091
1092         ep->qp.rq_first_qe = ep->qp.rq_virt;
1093         ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1094         ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1095         ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1096         ep->qp.rq_prod_idx = 0x8000;
1097         ep->qp.rq_cons_idx = 0;
1098         ep->qp.rqe_left = hba->max_rqes;
1099
1100         setup_qp_page_tables(ep);
1101
1102         return 0;
1103
1104 mem_alloc_err:
1105         bnx2i_free_qp_resc(hba, ep);
1106         return -ENOMEM;
1107 }
1108
1109
1110
1111 /**
1112  * bnx2i_free_qp_resc - free memory resources held by QP
1113  * @hba:        adapter structure pointer
1114  * @ep: endpoint (transport indentifier) structure
1115  *
1116  * Free QP resources - SQ/RQ/CQ memory and page tables.
1117  */
1118 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1119 {
1120         if (ep->qp.ctx_base) {
1121                 iounmap(ep->qp.ctx_base);
1122                 ep->qp.ctx_base = NULL;
1123         }
1124         /* Free SQ mem */
1125         if (ep->qp.sq_pgtbl_virt) {
1126                 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1127                                   ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1128                 ep->qp.sq_pgtbl_virt = NULL;
1129                 ep->qp.sq_pgtbl_phys = 0;
1130         }
1131         if (ep->qp.sq_virt) {
1132                 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1133                                   ep->qp.sq_virt, ep->qp.sq_phys);
1134                 ep->qp.sq_virt = NULL;
1135                 ep->qp.sq_phys = 0;
1136         }
1137
1138         /* Free RQ mem */
1139         if (ep->qp.rq_pgtbl_virt) {
1140                 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1141                                   ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1142                 ep->qp.rq_pgtbl_virt = NULL;
1143                 ep->qp.rq_pgtbl_phys = 0;
1144         }
1145         if (ep->qp.rq_virt) {
1146                 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1147                                   ep->qp.rq_virt, ep->qp.rq_phys);
1148                 ep->qp.rq_virt = NULL;
1149                 ep->qp.rq_phys = 0;
1150         }
1151
1152         /* Free CQ mem */
1153         if (ep->qp.cq_pgtbl_virt) {
1154                 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1155                                   ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1156                 ep->qp.cq_pgtbl_virt = NULL;
1157                 ep->qp.cq_pgtbl_phys = 0;
1158         }
1159         if (ep->qp.cq_virt) {
1160                 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1161                                   ep->qp.cq_virt, ep->qp.cq_phys);
1162                 ep->qp.cq_virt = NULL;
1163                 ep->qp.cq_phys = 0;
1164         }
1165 }
1166
1167
1168 /**
1169  * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1170  * @hba:        adapter structure pointer
1171  *
1172  * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1173  *      This results in iSCSi support validation and on-chip context manager
1174  *      initialization.  Firmware completes this handshake with a CQE carrying
1175  *      the result of iscsi support validation. Parameter carried by
1176  *      iscsi init request determines the number of offloaded connection and
1177  *      tolerance level for iscsi protocol violation this hba/chip can support
1178  */
1179 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1180 {
1181         struct kwqe *kwqe_arr[3];
1182         struct iscsi_kwqe_init1 iscsi_init;
1183         struct iscsi_kwqe_init2 iscsi_init2;
1184         int rc = 0;
1185         u64 mask64;
1186
1187         bnx2i_adjust_qp_size(hba);
1188
1189         iscsi_init.flags =
1190                 ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1191         if (en_tcp_dack)
1192                 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1193         iscsi_init.reserved0 = 0;
1194         iscsi_init.num_cqs = 1;
1195         iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1196         iscsi_init.hdr.flags =
1197                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1198
1199         iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1200         iscsi_init.dummy_buffer_addr_hi =
1201                 (u32) ((u64) hba->dummy_buf_dma >> 32);
1202
1203         hba->ctx_ccell_tasks =
1204                         ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1205         iscsi_init.num_ccells_per_conn = hba->num_ccell;
1206         iscsi_init.num_tasks_per_conn = hba->max_sqes;
1207         iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1208         iscsi_init.sq_num_wqes = hba->max_sqes;
1209         iscsi_init.cq_log_wqes_per_page =
1210                 (u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE);
1211         iscsi_init.cq_num_wqes = hba->max_cqes;
1212         iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1213                                    (PAGE_SIZE - 1)) / PAGE_SIZE;
1214         iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1215                                    (PAGE_SIZE - 1)) / PAGE_SIZE;
1216         iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1217         iscsi_init.rq_num_wqes = hba->max_rqes;
1218
1219
1220         iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1221         iscsi_init2.hdr.flags =
1222                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1223         iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1224         mask64 = 0x0ULL;
1225         mask64 |= (
1226                 /* CISCO MDS */
1227                 (1UL <<
1228                   ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1229                 /* HP MSA1510i */
1230                 (1UL <<
1231                   ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1232                 /* EMC */
1233                 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1234         if (error_mask1)
1235                 iscsi_init2.error_bit_map[0] = error_mask1;
1236         else
1237                 iscsi_init2.error_bit_map[0] = (u32) mask64;
1238
1239         if (error_mask2)
1240                 iscsi_init2.error_bit_map[1] = error_mask2;
1241         else
1242                 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1243
1244         iscsi_error_mask = mask64;
1245
1246         kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1247         kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1248
1249         if (hba->cnic && hba->cnic->submit_kwqes)
1250                 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1251         return rc;
1252 }
1253
1254
1255 /**
1256  * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1257  * @conn:       iscsi connection
1258  * @cqe:        pointer to newly DMA'ed CQE entry for processing
1259  *
1260  * process SCSI CMD Response CQE & complete the request to SCSI-ML
1261  */
1262 static int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1263                                        struct bnx2i_conn *bnx2i_conn,
1264                                        struct cqe *cqe)
1265 {
1266         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1267         struct bnx2i_cmd_response *resp_cqe;
1268         struct bnx2i_cmd *bnx2i_cmd;
1269         struct iscsi_task *task;
1270         struct iscsi_cmd_rsp *hdr;
1271         u32 datalen = 0;
1272
1273         resp_cqe = (struct bnx2i_cmd_response *)cqe;
1274         spin_lock(&session->lock);
1275         task = iscsi_itt_to_task(conn,
1276                                  resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1277         if (!task)
1278                 goto fail;
1279
1280         bnx2i_cmd = task->dd_data;
1281
1282         if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1283                 conn->datain_pdus_cnt +=
1284                         resp_cqe->task_stat.read_stat.num_data_outs;
1285                 conn->rxdata_octets +=
1286                         bnx2i_cmd->req.total_data_transfer_length;
1287         } else {
1288                 conn->dataout_pdus_cnt +=
1289                         resp_cqe->task_stat.read_stat.num_data_outs;
1290                 conn->r2t_pdus_cnt +=
1291                         resp_cqe->task_stat.read_stat.num_r2ts;
1292                 conn->txdata_octets +=
1293                         bnx2i_cmd->req.total_data_transfer_length;
1294         }
1295         bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1296
1297         hdr = (struct iscsi_cmd_rsp *)task->hdr;
1298         resp_cqe = (struct bnx2i_cmd_response *)cqe;
1299         hdr->opcode = resp_cqe->op_code;
1300         hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1301         hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1302         hdr->response = resp_cqe->response;
1303         hdr->cmd_status = resp_cqe->status;
1304         hdr->flags = resp_cqe->response_flags;
1305         hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1306
1307         if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1308                 goto done;
1309
1310         if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1311                 datalen = resp_cqe->data_length;
1312                 if (datalen < 2)
1313                         goto done;
1314
1315                 if (datalen > BNX2I_RQ_WQE_SIZE) {
1316                         iscsi_conn_printk(KERN_ERR, conn,
1317                                           "sense data len %d > RQ sz\n",
1318                                           datalen);
1319                         datalen = BNX2I_RQ_WQE_SIZE;
1320                 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1321                         iscsi_conn_printk(KERN_ERR, conn,
1322                                           "sense data len %d > conn data\n",
1323                                           datalen);
1324                         datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1325                 }
1326
1327                 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1328                 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1329         }
1330
1331 done:
1332         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1333                              conn->data, datalen);
1334 fail:
1335         spin_unlock(&session->lock);
1336         return 0;
1337 }
1338
1339
1340 /**
1341  * bnx2i_process_login_resp - this function handles iscsi login response
1342  * @session:            iscsi session pointer
1343  * @bnx2i_conn:         iscsi connection pointer
1344  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1345  *
1346  * process Login Response CQE & complete it to open-iscsi user daemon
1347  */
1348 static int bnx2i_process_login_resp(struct iscsi_session *session,
1349                                     struct bnx2i_conn *bnx2i_conn,
1350                                     struct cqe *cqe)
1351 {
1352         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1353         struct iscsi_task *task;
1354         struct bnx2i_login_response *login;
1355         struct iscsi_login_rsp *resp_hdr;
1356         int pld_len;
1357         int pad_len;
1358
1359         login = (struct bnx2i_login_response *) cqe;
1360         spin_lock(&session->lock);
1361         task = iscsi_itt_to_task(conn,
1362                                  login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1363         if (!task)
1364                 goto done;
1365
1366         resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1367         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1368         resp_hdr->opcode = login->op_code;
1369         resp_hdr->flags = login->response_flags;
1370         resp_hdr->max_version = login->version_max;
1371         resp_hdr->active_version = login->version_active;
1372         resp_hdr->hlength = 0;
1373
1374         hton24(resp_hdr->dlength, login->data_length);
1375         memcpy(resp_hdr->isid, &login->isid_lo, 6);
1376         resp_hdr->tsih = cpu_to_be16(login->tsih);
1377         resp_hdr->itt = task->hdr->itt;
1378         resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1379         resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1380         resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1381         resp_hdr->status_class = login->status_class;
1382         resp_hdr->status_detail = login->status_detail;
1383         pld_len = login->data_length;
1384         bnx2i_conn->gen_pdu.resp_wr_ptr =
1385                                         bnx2i_conn->gen_pdu.resp_buf + pld_len;
1386
1387         pad_len = 0;
1388         if (pld_len & 0x3)
1389                 pad_len = 4 - (pld_len % 4);
1390
1391         if (pad_len) {
1392                 int i = 0;
1393                 for (i = 0; i < pad_len; i++) {
1394                         bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1395                         bnx2i_conn->gen_pdu.resp_wr_ptr++;
1396                 }
1397         }
1398
1399         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1400                 bnx2i_conn->gen_pdu.resp_buf,
1401                 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1402 done:
1403         spin_unlock(&session->lock);
1404         return 0;
1405 }
1406
1407 /**
1408  * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1409  * @session:            iscsi session pointer
1410  * @bnx2i_conn:         iscsi connection pointer
1411  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1412  *
1413  * process iSCSI TMF Response CQE and wake up the driver eh thread.
1414  */
1415 static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1416                                   struct bnx2i_conn *bnx2i_conn,
1417                                   struct cqe *cqe)
1418 {
1419         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1420         struct iscsi_task *task;
1421         struct bnx2i_tmf_response *tmf_cqe;
1422         struct iscsi_tm_rsp *resp_hdr;
1423
1424         tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1425         spin_lock(&session->lock);
1426         task = iscsi_itt_to_task(conn,
1427                                  tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1428         if (!task)
1429                 goto done;
1430
1431         resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1432         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1433         resp_hdr->opcode = tmf_cqe->op_code;
1434         resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1435         resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1436         resp_hdr->itt = task->hdr->itt;
1437         resp_hdr->response = tmf_cqe->response;
1438
1439         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1440 done:
1441         spin_unlock(&session->lock);
1442         return 0;
1443 }
1444
1445 /**
1446  * bnx2i_process_logout_resp - this function handles iscsi logout response
1447  * @session:            iscsi session pointer
1448  * @bnx2i_conn:         iscsi connection pointer
1449  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1450  *
1451  * process iSCSI Logout Response CQE & make function call to
1452  * notify the user daemon.
1453  */
1454 static int bnx2i_process_logout_resp(struct iscsi_session *session,
1455                                      struct bnx2i_conn *bnx2i_conn,
1456                                      struct cqe *cqe)
1457 {
1458         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1459         struct iscsi_task *task;
1460         struct bnx2i_logout_response *logout;
1461         struct iscsi_logout_rsp *resp_hdr;
1462
1463         logout = (struct bnx2i_logout_response *) cqe;
1464         spin_lock(&session->lock);
1465         task = iscsi_itt_to_task(conn,
1466                                  logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1467         if (!task)
1468                 goto done;
1469
1470         resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1471         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1472         resp_hdr->opcode = logout->op_code;
1473         resp_hdr->flags = logout->response;
1474         resp_hdr->hlength = 0;
1475
1476         resp_hdr->itt = task->hdr->itt;
1477         resp_hdr->statsn = task->hdr->exp_statsn;
1478         resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1479         resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1480
1481         resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1482         resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1483
1484         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1485 done:
1486         spin_unlock(&session->lock);
1487         return 0;
1488 }
1489
1490 /**
1491  * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1492  * @session:            iscsi session pointer
1493  * @bnx2i_conn:         iscsi connection pointer
1494  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1495  *
1496  * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1497  */
1498 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1499                                            struct bnx2i_conn *bnx2i_conn,
1500                                            struct cqe *cqe)
1501 {
1502         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1503         struct bnx2i_nop_in_msg *nop_in;
1504         struct iscsi_task *task;
1505
1506         nop_in = (struct bnx2i_nop_in_msg *)cqe;
1507         spin_lock(&session->lock);
1508         task = iscsi_itt_to_task(conn,
1509                                  nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1510         if (task)
1511                 iscsi_put_task(task);
1512         spin_unlock(&session->lock);
1513 }
1514
1515 /**
1516  * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1517  * @conn:       iscsi connection
1518  *
1519  * Firmware advances RQ producer index for every unsolicited PDU even if
1520  *      payload data length is '0'. This function makes corresponding
1521  *      adjustments on the driver side to match this f/w behavior
1522  */
1523 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1524 {
1525         char dummy_rq_data[2];
1526         bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1527         bnx2i_put_rq_buf(bnx2i_conn, 1);
1528 }
1529
1530
1531 /**
1532  * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1533  * @session:            iscsi session pointer
1534  * @bnx2i_conn:         iscsi connection pointer
1535  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1536  *
1537  * process iSCSI target's proactive iSCSI NOPIN request
1538  */
1539 static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1540                                      struct bnx2i_conn *bnx2i_conn,
1541                                      struct cqe *cqe)
1542 {
1543         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1544         struct iscsi_task *task;
1545         struct bnx2i_nop_in_msg *nop_in;
1546         struct iscsi_nopin *hdr;
1547         u32 itt;
1548         int tgt_async_nop = 0;
1549
1550         nop_in = (struct bnx2i_nop_in_msg *)cqe;
1551         itt = nop_in->itt & ISCSI_NOP_IN_MSG_INDEX;
1552
1553         spin_lock(&session->lock);
1554         hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1555         memset(hdr, 0, sizeof(struct iscsi_hdr));
1556         hdr->opcode = nop_in->op_code;
1557         hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1558         hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1559         hdr->ttt = cpu_to_be32(nop_in->ttt);
1560
1561         if (itt == (u16) RESERVED_ITT) {
1562                 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1563                 hdr->itt = RESERVED_ITT;
1564                 tgt_async_nop = 1;
1565                 goto done;
1566         }
1567
1568         /* this is a response to one of our nop-outs */
1569         task = iscsi_itt_to_task(conn, itt);
1570         if (task) {
1571                 hdr->flags = ISCSI_FLAG_CMD_FINAL;
1572                 hdr->itt = task->hdr->itt;
1573                 hdr->ttt = cpu_to_be32(nop_in->ttt);
1574                 memcpy(hdr->lun, nop_in->lun, 8);
1575         }
1576 done:
1577         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1578         spin_unlock(&session->lock);
1579
1580         return tgt_async_nop;
1581 }
1582
1583
1584 /**
1585  * bnx2i_process_async_mesg - this function handles iscsi async message
1586  * @session:            iscsi session pointer
1587  * @bnx2i_conn:         iscsi connection pointer
1588  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1589  *
1590  * process iSCSI ASYNC Message
1591  */
1592 static void bnx2i_process_async_mesg(struct iscsi_session *session,
1593                                      struct bnx2i_conn *bnx2i_conn,
1594                                      struct cqe *cqe)
1595 {
1596         struct bnx2i_async_msg *async_cqe;
1597         struct iscsi_async *resp_hdr;
1598         u8 async_event;
1599
1600         bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1601
1602         async_cqe = (struct bnx2i_async_msg *)cqe;
1603         async_event = async_cqe->async_event;
1604
1605         if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1606                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1607                                   "async: scsi events not supported\n");
1608                 return;
1609         }
1610
1611         spin_lock(&session->lock);
1612         resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1613         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1614         resp_hdr->opcode = async_cqe->op_code;
1615         resp_hdr->flags = 0x80;
1616
1617         memcpy(resp_hdr->lun, async_cqe->lun, 8);
1618         resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1619         resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1620
1621         resp_hdr->async_event = async_cqe->async_event;
1622         resp_hdr->async_vcode = async_cqe->async_vcode;
1623
1624         resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1625         resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1626         resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1627
1628         __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1629                              (struct iscsi_hdr *)resp_hdr, NULL, 0);
1630         spin_unlock(&session->lock);
1631 }
1632
1633
1634 /**
1635  * bnx2i_process_reject_mesg - process iscsi reject pdu
1636  * @session:            iscsi session pointer
1637  * @bnx2i_conn:         iscsi connection pointer
1638  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1639  *
1640  * process iSCSI REJECT message
1641  */
1642 static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1643                                       struct bnx2i_conn *bnx2i_conn,
1644                                       struct cqe *cqe)
1645 {
1646         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1647         struct bnx2i_reject_msg *reject;
1648         struct iscsi_reject *hdr;
1649
1650         reject = (struct bnx2i_reject_msg *) cqe;
1651         if (reject->data_length) {
1652                 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1653                 bnx2i_put_rq_buf(bnx2i_conn, 1);
1654         } else
1655                 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1656
1657         spin_lock(&session->lock);
1658         hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1659         memset(hdr, 0, sizeof(struct iscsi_hdr));
1660         hdr->opcode = reject->op_code;
1661         hdr->reason = reject->reason;
1662         hton24(hdr->dlength, reject->data_length);
1663         hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1664         hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1665         hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1666         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1667                              reject->data_length);
1668         spin_unlock(&session->lock);
1669 }
1670
1671 /**
1672  * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1673  * @session:            iscsi session pointer
1674  * @bnx2i_conn:         iscsi connection pointer
1675  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1676  *
1677  * process command cleanup response CQE during conn shutdown or error recovery
1678  */
1679 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1680                                            struct bnx2i_conn *bnx2i_conn,
1681                                            struct cqe *cqe)
1682 {
1683         struct bnx2i_cleanup_response *cmd_clean_rsp;
1684         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1685         struct iscsi_task *task;
1686
1687         cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1688         spin_lock(&session->lock);
1689         task = iscsi_itt_to_task(conn,
1690                         cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1691         if (!task)
1692                 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1693                         cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1694         spin_unlock(&session->lock);
1695         complete(&bnx2i_conn->cmd_cleanup_cmpl);
1696 }
1697
1698
1699
1700 /**
1701  * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1702  * @bnx2i_conn:         iscsi connection
1703  *
1704  * this function is called by generic KCQ handler to process all pending CQE's
1705  */
1706 static void bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
1707 {
1708         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1709         struct iscsi_session *session = conn->session;
1710         struct qp_info *qp = &bnx2i_conn->ep->qp;
1711         struct bnx2i_nop_in_msg *nopin;
1712         int tgt_async_msg;
1713
1714         while (1) {
1715                 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1716                 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1717                         break;
1718
1719                 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx)))
1720                         break;
1721
1722                 tgt_async_msg = 0;
1723
1724                 switch (nopin->op_code) {
1725                 case ISCSI_OP_SCSI_CMD_RSP:
1726                 case ISCSI_OP_SCSI_DATA_IN:
1727                         bnx2i_process_scsi_cmd_resp(session, bnx2i_conn,
1728                                                     qp->cq_cons_qe);
1729                         break;
1730                 case ISCSI_OP_LOGIN_RSP:
1731                         bnx2i_process_login_resp(session, bnx2i_conn,
1732                                                  qp->cq_cons_qe);
1733                         break;
1734                 case ISCSI_OP_SCSI_TMFUNC_RSP:
1735                         bnx2i_process_tmf_resp(session, bnx2i_conn,
1736                                                qp->cq_cons_qe);
1737                         break;
1738                 case ISCSI_OP_LOGOUT_RSP:
1739                         bnx2i_process_logout_resp(session, bnx2i_conn,
1740                                                   qp->cq_cons_qe);
1741                         break;
1742                 case ISCSI_OP_NOOP_IN:
1743                         if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
1744                                                      qp->cq_cons_qe))
1745                                 tgt_async_msg = 1;
1746                         break;
1747                 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
1748                         bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
1749                                                        qp->cq_cons_qe);
1750                         break;
1751                 case ISCSI_OP_ASYNC_EVENT:
1752                         bnx2i_process_async_mesg(session, bnx2i_conn,
1753                                                  qp->cq_cons_qe);
1754                         tgt_async_msg = 1;
1755                         break;
1756                 case ISCSI_OP_REJECT:
1757                         bnx2i_process_reject_mesg(session, bnx2i_conn,
1758                                                   qp->cq_cons_qe);
1759                         break;
1760                 case ISCSI_OPCODE_CLEANUP_RESPONSE:
1761                         bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
1762                                                        qp->cq_cons_qe);
1763                         break;
1764                 default:
1765                         printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
1766                                           nopin->op_code);
1767                 }
1768
1769                 if (!tgt_async_msg)
1770                         bnx2i_conn->ep->num_active_cmds--;
1771
1772                 /* clear out in production version only, till beta keep opcode
1773                  * field intact, will be helpful in debugging (context dump)
1774                  * nopin->op_code = 0;
1775                  */
1776                 qp->cqe_exp_seq_sn++;
1777                 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
1778                         qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1779
1780                 if (qp->cq_cons_qe == qp->cq_last_qe) {
1781                         qp->cq_cons_qe = qp->cq_first_qe;
1782                         qp->cq_cons_idx = 0;
1783                 } else {
1784                         qp->cq_cons_qe++;
1785                         qp->cq_cons_idx++;
1786                 }
1787         }
1788         bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1789 }
1790
1791 /**
1792  * bnx2i_fastpath_notification - process global event queue (KCQ)
1793  * @hba:                adapter structure pointer
1794  * @new_cqe_kcqe:       pointer to newly DMA'ed KCQE entry
1795  *
1796  * Fast path event notification handler, KCQ entry carries context id
1797  *      of the connection that has 1 or more pending CQ entries
1798  */
1799 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
1800                                         struct iscsi_kcqe *new_cqe_kcqe)
1801 {
1802         struct bnx2i_conn *conn;
1803         u32 iscsi_cid;
1804
1805         iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
1806         conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1807
1808         if (!conn) {
1809                 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
1810                 return;
1811         }
1812         if (!conn->ep) {
1813                 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
1814                 return;
1815         }
1816
1817         bnx2i_process_new_cqes(conn);
1818 }
1819
1820
1821 /**
1822  * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
1823  * @hba:                adapter structure pointer
1824  * @update_kcqe:        kcqe pointer
1825  *
1826  * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
1827  */
1828 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
1829                                            struct iscsi_kcqe *update_kcqe)
1830 {
1831         struct bnx2i_conn *conn;
1832         u32 iscsi_cid;
1833
1834         iscsi_cid = update_kcqe->iscsi_conn_id;
1835         conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1836
1837         if (!conn) {
1838                 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
1839                 return;
1840         }
1841         if (!conn->ep) {
1842                 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
1843                 return;
1844         }
1845
1846         if (update_kcqe->completion_status) {
1847                 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
1848                 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
1849         } else
1850                 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
1851
1852         wake_up_interruptible(&conn->ep->ofld_wait);
1853 }
1854
1855
1856 /**
1857  * bnx2i_recovery_que_add_conn - add connection to recovery queue
1858  * @hba:                adapter structure pointer
1859  * @bnx2i_conn:         iscsi connection
1860  *
1861  * Add connection to recovery queue and schedule adapter eh worker
1862  */
1863 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
1864                                         struct bnx2i_conn *bnx2i_conn)
1865 {
1866         iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
1867                            ISCSI_ERR_CONN_FAILED);
1868 }
1869
1870
1871 /**
1872  * bnx2i_process_tcp_error - process error notification on a given connection
1873  *
1874  * @hba:                adapter structure pointer
1875  * @tcp_err:            tcp error kcqe pointer
1876  *
1877  * handles tcp level error notifications from FW.
1878  */
1879 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
1880                                     struct iscsi_kcqe *tcp_err)
1881 {
1882         struct bnx2i_conn *bnx2i_conn;
1883         u32 iscsi_cid;
1884
1885         iscsi_cid = tcp_err->iscsi_conn_id;
1886         bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1887
1888         if (!bnx2i_conn) {
1889                 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1890                 return;
1891         }
1892
1893         printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
1894                           iscsi_cid, tcp_err->completion_status);
1895         bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
1896 }
1897
1898
1899 /**
1900  * bnx2i_process_iscsi_error - process error notification on a given connection
1901  * @hba:                adapter structure pointer
1902  * @iscsi_err:          iscsi error kcqe pointer
1903  *
1904  * handles iscsi error notifications from the FW. Firmware based in initial
1905  *      handshake classifies iscsi protocol / TCP rfc violation into either
1906  *      warning or error indications. If indication is of "Error" type, driver
1907  *      will initiate session recovery for that connection/session. For
1908  *      "Warning" type indication, driver will put out a system log message
1909  *      (there will be only one message for each type for the life of the
1910  *      session, this is to avoid un-necessarily overloading the system)
1911  */
1912 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
1913                                       struct iscsi_kcqe *iscsi_err)
1914 {
1915         struct bnx2i_conn *bnx2i_conn;
1916         u32 iscsi_cid;
1917         char warn_notice[] = "iscsi_warning";
1918         char error_notice[] = "iscsi_error";
1919         char additional_notice[64];
1920         char *message;
1921         int need_recovery;
1922         u64 err_mask64;
1923
1924         iscsi_cid = iscsi_err->iscsi_conn_id;
1925         bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1926         if (!bnx2i_conn) {
1927                 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1928                 return;
1929         }
1930
1931         err_mask64 = (0x1ULL << iscsi_err->completion_status);
1932
1933         if (err_mask64 & iscsi_error_mask) {
1934                 need_recovery = 0;
1935                 message = warn_notice;
1936         } else {
1937                 need_recovery = 1;
1938                 message = error_notice;
1939         }
1940
1941         switch (iscsi_err->completion_status) {
1942         case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
1943                 strcpy(additional_notice, "hdr digest err");
1944                 break;
1945         case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
1946                 strcpy(additional_notice, "data digest err");
1947                 break;
1948         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
1949                 strcpy(additional_notice, "wrong opcode rcvd");
1950                 break;
1951         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
1952                 strcpy(additional_notice, "AHS len > 0 rcvd");
1953                 break;
1954         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
1955                 strcpy(additional_notice, "invalid ITT rcvd");
1956                 break;
1957         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
1958                 strcpy(additional_notice, "wrong StatSN rcvd");
1959                 break;
1960         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
1961                 strcpy(additional_notice, "wrong DataSN rcvd");
1962                 break;
1963         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
1964                 strcpy(additional_notice, "pend R2T violation");
1965                 break;
1966         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
1967                 strcpy(additional_notice, "ERL0, UO");
1968                 break;
1969         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
1970                 strcpy(additional_notice, "ERL0, U1");
1971                 break;
1972         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
1973                 strcpy(additional_notice, "ERL0, U2");
1974                 break;
1975         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
1976                 strcpy(additional_notice, "ERL0, U3");
1977                 break;
1978         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
1979                 strcpy(additional_notice, "ERL0, U4");
1980                 break;
1981         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
1982                 strcpy(additional_notice, "ERL0, U5");
1983                 break;
1984         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
1985                 strcpy(additional_notice, "ERL0, U6");
1986                 break;
1987         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
1988                 strcpy(additional_notice, "invalid resi len");
1989                 break;
1990         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
1991                 strcpy(additional_notice, "MRDSL violation");
1992                 break;
1993         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
1994                 strcpy(additional_notice, "F-bit not set");
1995                 break;
1996         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
1997                 strcpy(additional_notice, "invalid TTT");
1998                 break;
1999         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
2000                 strcpy(additional_notice, "invalid DataSN");
2001                 break;
2002         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2003                 strcpy(additional_notice, "burst len violation");
2004                 break;
2005         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2006                 strcpy(additional_notice, "buf offset violation");
2007                 break;
2008         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2009                 strcpy(additional_notice, "invalid LUN field");
2010                 break;
2011         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2012                 strcpy(additional_notice, "invalid R2TSN field");
2013                 break;
2014 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0       \
2015         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2016         case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2017                 strcpy(additional_notice, "invalid cmd len1");
2018                 break;
2019 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1       \
2020         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2021         case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2022                 strcpy(additional_notice, "invalid cmd len2");
2023                 break;
2024         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2025                 strcpy(additional_notice,
2026                        "pend r2t exceeds MaxOutstandingR2T value");
2027                 break;
2028         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2029                 strcpy(additional_notice, "TTT is rsvd");
2030                 break;
2031         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2032                 strcpy(additional_notice, "MBL violation");
2033                 break;
2034 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO         \
2035         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2036         case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2037                 strcpy(additional_notice, "data seg len != 0");
2038                 break;
2039         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2040                 strcpy(additional_notice, "reject pdu len error");
2041                 break;
2042         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2043                 strcpy(additional_notice, "async pdu len error");
2044                 break;
2045         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2046                 strcpy(additional_notice, "nopin pdu len error");
2047                 break;
2048 #define BNX2_ERR_PEND_R2T_IN_CLEANUP                    \
2049         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2050         case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2051                 strcpy(additional_notice, "pend r2t in cleanup");
2052                 break;
2053
2054         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2055                 strcpy(additional_notice, "IP fragments rcvd");
2056                 break;
2057         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2058                 strcpy(additional_notice, "IP options error");
2059                 break;
2060         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2061                 strcpy(additional_notice, "urgent flag error");
2062                 break;
2063         default:
2064                 printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2065                                   iscsi_err->completion_status);
2066         }
2067
2068         if (need_recovery) {
2069                 iscsi_conn_printk(KERN_ALERT,
2070                                   bnx2i_conn->cls_conn->dd_data,
2071                                   "bnx2i: %s - %s\n",
2072                                   message, additional_notice);
2073
2074                 iscsi_conn_printk(KERN_ALERT,
2075                                   bnx2i_conn->cls_conn->dd_data,
2076                                   "conn_err - hostno %d conn %p, "
2077                                   "iscsi_cid %x cid %x\n",
2078                                   bnx2i_conn->hba->shost->host_no,
2079                                   bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2080                                   bnx2i_conn->ep->ep_cid);
2081                 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2082         } else
2083                 if (!test_and_set_bit(iscsi_err->completion_status,
2084                                       (void *) &bnx2i_conn->violation_notified))
2085                         iscsi_conn_printk(KERN_ALERT,
2086                                           bnx2i_conn->cls_conn->dd_data,
2087                                           "bnx2i: %s - %s\n",
2088                                           message, additional_notice);
2089 }
2090
2091
2092 /**
2093  * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2094  * @hba:                adapter structure pointer
2095  * @conn_destroy:       conn destroy kcqe pointer
2096  *
2097  * handles connection destroy completion request.
2098  */
2099 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2100                                             struct iscsi_kcqe *conn_destroy)
2101 {
2102         struct bnx2i_endpoint *ep;
2103
2104         ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2105         if (!ep) {
2106                 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2107                                   "offload request, unexpected complection\n");
2108                 return;
2109         }
2110
2111         if (hba != ep->hba) {
2112                 printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2113                 return;
2114         }
2115
2116         if (conn_destroy->completion_status) {
2117                 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2118                 ep->state = EP_STATE_CLEANUP_FAILED;
2119         } else
2120                 ep->state = EP_STATE_CLEANUP_CMPL;
2121         wake_up_interruptible(&ep->ofld_wait);
2122 }
2123
2124
2125 /**
2126  * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2127  * @hba:                adapter structure pointer
2128  * @ofld_kcqe:          conn offload kcqe pointer
2129  *
2130  * handles initial connection offload completion, ep_connect() thread is
2131  *      woken-up to continue with LLP connect process
2132  */
2133 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2134                                     struct iscsi_kcqe *ofld_kcqe)
2135 {
2136         u32 cid_addr;
2137         struct bnx2i_endpoint *ep;
2138         u32 cid_num;
2139
2140         ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2141         if (!ep) {
2142                 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2143                 return;
2144         }
2145
2146         if (hba != ep->hba) {
2147                 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2148                 return;
2149         }
2150
2151         if (ofld_kcqe->completion_status) {
2152                 if (ofld_kcqe->completion_status ==
2153                     ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2154                         printk(KERN_ALERT "bnx2i: unable to allocate"
2155                                           " iSCSI context resources\n");
2156                 ep->state = EP_STATE_OFLD_FAILED;
2157         } else {
2158                 ep->state = EP_STATE_OFLD_COMPL;
2159                 cid_addr = ofld_kcqe->iscsi_conn_context_id;
2160                 cid_num = bnx2i_get_cid_num(ep);
2161                 ep->ep_cid = cid_addr;
2162                 ep->qp.ctx_base = NULL;
2163         }
2164         wake_up_interruptible(&ep->ofld_wait);
2165 }
2166
2167 /**
2168  * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2169  * @hba:                adapter structure pointer
2170  * @update_kcqe:        kcqe pointer
2171  *
2172  * Generic KCQ event handler/dispatcher
2173  */
2174 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2175                                 u32 num_cqe)
2176 {
2177         struct bnx2i_hba *hba = context;
2178         int i = 0;
2179         struct iscsi_kcqe *ikcqe = NULL;
2180
2181         while (i < num_cqe) {
2182                 ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2183
2184                 if (ikcqe->op_code ==
2185                     ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2186                         bnx2i_fastpath_notification(hba, ikcqe);
2187                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2188                         bnx2i_process_ofld_cmpl(hba, ikcqe);
2189                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2190                         bnx2i_process_update_conn_cmpl(hba, ikcqe);
2191                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2192                         if (ikcqe->completion_status !=
2193                             ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2194                                 bnx2i_iscsi_license_error(hba, ikcqe->\
2195                                                           completion_status);
2196                         else {
2197                                 set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2198                                 bnx2i_get_link_state(hba);
2199                                 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2200                                                  "ISCSI_INIT passed\n",
2201                                                  (u8)hba->pcidev->bus->number,
2202                                                  hba->pci_devno,
2203                                                  (u8)hba->pci_func);
2204
2205
2206                         }
2207                 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2208                         bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2209                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2210                         bnx2i_process_iscsi_error(hba, ikcqe);
2211                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2212                         bnx2i_process_tcp_error(hba, ikcqe);
2213                 else
2214                         printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2215                                           ikcqe->op_code);
2216         }
2217 }
2218
2219
2220 /**
2221  * bnx2i_indicate_netevent - Generic netdev event handler
2222  * @context:    adapter structure pointer
2223  * @event:      event type
2224  *
2225  * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2226  *      NETDEV_GOING_DOWN and NETDEV_CHANGE
2227  */
2228 static void bnx2i_indicate_netevent(void *context, unsigned long event)
2229 {
2230         struct bnx2i_hba *hba = context;
2231
2232         switch (event) {
2233         case NETDEV_UP:
2234                 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2235                         bnx2i_send_fw_iscsi_init_msg(hba);
2236                 break;
2237         case NETDEV_DOWN:
2238                 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2239                 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2240                 break;
2241         case NETDEV_GOING_DOWN:
2242                 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2243                 iscsi_host_for_each_session(hba->shost,
2244                                             bnx2i_drop_session);
2245                 break;
2246         case NETDEV_CHANGE:
2247                 bnx2i_get_link_state(hba);
2248                 break;
2249         default:
2250                 ;
2251         }
2252 }
2253
2254
2255 /**
2256  * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2257  * @cm_sk:              cnic sock structure pointer
2258  *
2259  * function callback exported via bnx2i - cnic driver interface to
2260  *      indicate completion of option-2 TCP connect request.
2261  */
2262 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2263 {
2264         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2265
2266         if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2267                 ep->state = EP_STATE_CONNECT_FAILED;
2268         else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2269                 ep->state = EP_STATE_CONNECT_COMPL;
2270         else
2271                 ep->state = EP_STATE_CONNECT_FAILED;
2272
2273         wake_up_interruptible(&ep->ofld_wait);
2274 }
2275
2276
2277 /**
2278  * bnx2i_cm_close_cmpl - process tcp conn close completion
2279  * @cm_sk:      cnic sock structure pointer
2280  *
2281  * function callback exported via bnx2i - cnic driver interface to
2282  *      indicate completion of option-2 graceful TCP connect shutdown
2283  */
2284 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2285 {
2286         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2287
2288         ep->state = EP_STATE_DISCONN_COMPL;
2289         wake_up_interruptible(&ep->ofld_wait);
2290 }
2291
2292
2293 /**
2294  * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2295  * @cm_sk:      cnic sock structure pointer
2296  *
2297  * function callback exported via bnx2i - cnic driver interface to
2298  *      indicate completion of option-2 abortive TCP connect termination
2299  */
2300 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2301 {
2302         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2303
2304         ep->state = EP_STATE_DISCONN_COMPL;
2305         wake_up_interruptible(&ep->ofld_wait);
2306 }
2307
2308
2309 /**
2310  * bnx2i_cm_remote_close - process received TCP FIN
2311  * @hba:                adapter structure pointer
2312  * @update_kcqe:        kcqe pointer
2313  *
2314  * function callback exported via bnx2i - cnic driver interface to indicate
2315  *      async TCP events such as FIN
2316  */
2317 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2318 {
2319         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2320
2321         ep->state = EP_STATE_TCP_FIN_RCVD;
2322         if (ep->conn)
2323                 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2324 }
2325
2326 /**
2327  * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2328  * @hba:                adapter structure pointer
2329  * @update_kcqe:        kcqe pointer
2330  *
2331  * function callback exported via bnx2i - cnic driver interface to
2332  *      indicate async TCP events (RST) sent by the peer.
2333  */
2334 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2335 {
2336         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2337
2338         ep->state = EP_STATE_TCP_RST_RCVD;
2339         if (ep->conn)
2340                 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2341 }
2342
2343
2344 static void bnx2i_send_nl_mesg(struct cnic_dev *dev, u32 msg_type,
2345                                char *buf, u16 buflen)
2346 {
2347         struct bnx2i_hba *hba;
2348
2349         hba = bnx2i_find_hba_for_cnic(dev);
2350         if (!hba)
2351                 return;
2352
2353         if (iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2354                                    msg_type, buf, buflen))
2355                 printk(KERN_ALERT "bnx2i: private nl message send error\n");
2356
2357 }
2358
2359
2360 /**
2361  * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2362  *                      carrying callback function pointers
2363  *
2364  */
2365 struct cnic_ulp_ops bnx2i_cnic_cb = {
2366         .cnic_init = bnx2i_ulp_init,
2367         .cnic_exit = bnx2i_ulp_exit,
2368         .cnic_start = bnx2i_start,
2369         .cnic_stop = bnx2i_stop,
2370         .indicate_kcqes = bnx2i_indicate_kcqe,
2371         .indicate_netevent = bnx2i_indicate_netevent,
2372         .cm_connect_complete = bnx2i_cm_connect_cmpl,
2373         .cm_close_complete = bnx2i_cm_close_cmpl,
2374         .cm_abort_complete = bnx2i_cm_abort_cmpl,
2375         .cm_remote_close = bnx2i_cm_remote_close,
2376         .cm_remote_abort = bnx2i_cm_remote_abort,
2377         .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2378         .owner = THIS_MODULE
2379 };
2380
2381
2382 /**
2383  * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2384  * @ep: bnx2i endpoint
2385  *
2386  * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2387  *      register in BAR #0. Whereas in 57710 these register are accessed by
2388  *      mapping BAR #1
2389  */
2390 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2391 {
2392         u32 cid_num;
2393         u32 reg_off;
2394         u32 first_l4l5;
2395         u32 ctx_sz;
2396         u32 config2;
2397         resource_size_t reg_base;
2398
2399         cid_num = bnx2i_get_cid_num(ep);
2400
2401         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2402                 reg_base = pci_resource_start(ep->hba->pcidev,
2403                                               BNX2X_DOORBELL_PCI_BAR);
2404                 reg_off = PAGE_SIZE * (cid_num & 0x1FFFF) + DPM_TRIGER_TYPE;
2405                 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
2406                 goto arm_cq;
2407         }
2408
2409         reg_base = ep->hba->netdev->base_addr;
2410         if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2411             (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2412                 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2413                 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2414                 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2415                 if (ctx_sz)
2416                         reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2417                                   + BNX2I_570X_PAGE_SIZE_DEFAULT *
2418                                   (((cid_num - first_l4l5) / ctx_sz) + 256);
2419                 else
2420                         reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2421         } else
2422                 /* 5709 device in normal node and 5706/5708 devices */
2423                 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2424
2425         ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off,
2426                                           MB_KERNEL_CTX_SIZE);
2427         if (!ep->qp.ctx_base)
2428                 return -ENOMEM;
2429
2430 arm_cq:
2431         bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2432         return 0;
2433 }