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 <scsi/scsi_tcq.h>
  15 #include <scsi/libiscsi.h>
  16 #include "bnx2i.h"
  17
  18 /**
  19  * bnx2i_get_cid_num - get cid from ep
  20  * @ep:         endpoint pointer
  21  *
  22  * Only applicable to 57710 family of devices
  23  */
  24 static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
  25 {
  26         u32 cid;
  27
  28         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
  29                 cid = ep->ep_cid;
  30         else
  31                 cid = GET_CID_NUM(ep->ep_cid);
  32         return cid;
  33 }
  34
  35
  36 /**
  37  * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
  38  * @hba:                Adapter for which adjustments is to be made
  39  *
  40  * Only applicable to 57710 family of devices
  41  */
  42 static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
  43 {
  44         u32 num_elements_per_pg;
  45
  46         if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
  47             test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
  48             test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
  49                 if (!is_power_of_2(hba->max_sqes))
  50                         hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);
  51
  52                 if (!is_power_of_2(hba->max_rqes))
  53                         hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
  54         }
  55
  56         /* Adjust each queue size if the user selection does not
  57          * yield integral num of page buffers
  58          */
  59         /* adjust SQ */
  60         num_elements_per_pg = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
  61         if (hba->max_sqes < num_elements_per_pg)
  62                 hba->max_sqes = num_elements_per_pg;
  63         else if (hba->max_sqes % num_elements_per_pg)
  64                 hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
  65                                  ~(num_elements_per_pg - 1);
  66
  67         /* adjust CQ */
  68         num_elements_per_pg = PAGE_SIZE / BNX2I_CQE_SIZE;
  69         if (hba->max_cqes < num_elements_per_pg)
  70                 hba->max_cqes = num_elements_per_pg;
  71         else if (hba->max_cqes % num_elements_per_pg)
  72                 hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
  73                                  ~(num_elements_per_pg - 1);
  74
  75         /* adjust RQ */
  76         num_elements_per_pg = PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
  77         if (hba->max_rqes < num_elements_per_pg)
  78                 hba->max_rqes = num_elements_per_pg;
  79         else if (hba->max_rqes % num_elements_per_pg)
  80                 hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
  81                                  ~(num_elements_per_pg - 1);
  82 }
  83
  84
  85 /**
  86  * bnx2i_get_link_state - get network interface link state
  87  * @hba:        adapter instance pointer
  88  *
  89  * updates adapter structure flag based on netdev state
  90  */
  91 static void bnx2i_get_link_state(struct bnx2i_hba *hba)
  92 {
  93         if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
  94                 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
  95         else
  96                 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
  97 }
  98
  99
 100 /**
 101  * bnx2i_iscsi_license_error - displays iscsi license related error message
 102  * @hba:                adapter instance pointer
 103  * @error_code:         error classification
 104  *
 105  * Puts out an error log when driver is unable to offload iscsi connection
 106  *      due to license restrictions
 107  */
 108 static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
 109 {
 110         if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
 111                 /* iSCSI offload not supported on this device */
 112                 printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
 113                                 hba->netdev->name);
 114         if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
 115                 /* iSCSI offload not supported on this LOM device */
 116                 printk(KERN_ERR "bnx2i: LOM is not enable to "
 117                                 "offload iSCSI connections, dev=%s\n",
 118                                 hba->netdev->name);
 119         set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
 120 }
 121
 122
 123 /**
 124  * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
 125  * @ep:         endpoint (transport indentifier) structure
 126  * @action:     action, ARM or DISARM. For now only ARM_CQE is used
 127  *
 128  * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
 129  *      the driver. EQ event is generated CQ index is hit or at least 1 CQ is
 130  *      outstanding and on chip timer expires
 131  */
 132 void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
 133 {
 134         struct bnx2i_5771x_cq_db *cq_db;
 135         u16 cq_index;
 136         u16 next_index;
 137         u32 num_active_cmds;
 138
 139
 140         /* Coalesce CQ entries only on 10G devices */
 141         if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 142                 return;
 143
 144         /* Do not update CQ DB multiple times before firmware writes
 145          * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
 146          * interrupts and other unwanted results
 147          */
 148         cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
 149         if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
 150                 return;
 151
 152         if (action == CNIC_ARM_CQE) {
 153                 num_active_cmds = ep->num_active_cmds;
 154                 if (num_active_cmds <= event_coal_min)
 155                         next_index = 1;
 156                 else
 157                         next_index = event_coal_min +
 158                                 (num_active_cmds - event_coal_min) / event_coal_div;
 159                 if (!next_index)
 160                         next_index = 1;
 161                 cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;
 162                 if (cq_index > ep->qp.cqe_size * 2)
 163                         cq_index -= ep->qp.cqe_size * 2;
 164                 if (!cq_index)
 165                         cq_index = 1;
 166
 167                 cq_db->sqn[0] = cq_index;
 168         }
 169 }
 170
 171
 172 /**
 173  * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
 174  * @conn:               iscsi connection on which RQ event occured
 175  * @ptr:                driver buffer to which RQ buffer contents is to
 176  *                      be copied
 177  * @len:                length of valid data inside RQ buf
 178  *
 179  * Copies RQ buffer contents from shared (DMA'able) memory region to
 180  *      driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
 181  *      scsi sense info
 182  */
 183 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
 184 {
 185         if (!bnx2i_conn->ep->qp.rqe_left)
 186                 return;
 187
 188         bnx2i_conn->ep->qp.rqe_left--;
 189         memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
 190         if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
 191                 bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
 192                 bnx2i_conn->ep->qp.rq_cons_idx = 0;
 193         } else {
 194                 bnx2i_conn->ep->qp.rq_cons_qe++;
 195                 bnx2i_conn->ep->qp.rq_cons_idx++;
 196         }
 197 }
 198
 199
 200 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
 201 {
 202         struct bnx2i_5771x_dbell dbell;
 203         u32 msg;
 204
 205         memset(&dbell, 0, sizeof(dbell));
 206         dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
 207                               B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
 208         msg = *((u32 *)&dbell);
 209         /* TODO : get doorbell register mapping */
 210         writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
 211 }
 212
 213
 214 /**
 215  * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
 216  * @conn:       iscsi connection on which event to post
 217  * @count:      number of RQ buffer being posted to chip
 218  *
 219  * No need to ring hardware doorbell for 57710 family of devices
 220  */
 221 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
 222 {
 223         struct bnx2i_5771x_sq_rq_db *rq_db;
 224         u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
 225         struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 226
 227         ep->qp.rqe_left += count;
 228         ep->qp.rq_prod_idx &= 0x7FFF;
 229         ep->qp.rq_prod_idx += count;
 230
 231         if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
 232                 ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
 233                 if (!hi_bit)
 234                         ep->qp.rq_prod_idx |= 0x8000;
 235         } else
 236                 ep->qp.rq_prod_idx |= hi_bit;
 237
 238         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 239                 rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
 240                 rq_db->prod_idx = ep->qp.rq_prod_idx;
 241                 /* no need to ring hardware doorbell for 57710 */
 242         } else {
 243                 writew(ep->qp.rq_prod_idx,
 244                        ep->qp.ctx_base + CNIC_RECV_DOORBELL);
 245         }
 246         mmiowb();
 247 }
 248
 249
 250 /**
 251  * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
 252  * @conn:               iscsi connection to which new SQ entries belong
 253  * @count:              number of SQ WQEs to post
 254  *
 255  * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
 256  *      of devices. For 5706/5708/5709 new SQ WQE count is written into the
 257  *      doorbell register
 258  */
 259 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
 260 {
 261         struct bnx2i_5771x_sq_rq_db *sq_db;
 262         struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 263
 264         ep->num_active_cmds++;
 265         wmb();  /* flush SQ WQE memory before the doorbell is rung */
 266         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 267                 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
 268                 sq_db->prod_idx = ep->qp.sq_prod_idx;
 269                 bnx2i_ring_577xx_doorbell(bnx2i_conn);
 270         } else
 271                 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
 272
 273         mmiowb(); /* flush posted PCI writes */
 274 }
 275
 276
 277 /**
 278  * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
 279  * @conn:       iscsi connection to which new SQ entries belong
 280  * @count:      number of SQ WQEs to post
 281  *
 282  * this routine will update SQ driver parameters and ring the doorbell
 283  */
 284 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
 285                                               int count)
 286 {
 287         int tmp_cnt;
 288
 289         if (count == 1) {
 290                 if (bnx2i_conn->ep->qp.sq_prod_qe ==
 291                     bnx2i_conn->ep->qp.sq_last_qe)
 292                         bnx2i_conn->ep->qp.sq_prod_qe =
 293                                                 bnx2i_conn->ep->qp.sq_first_qe;
 294                 else
 295                         bnx2i_conn->ep->qp.sq_prod_qe++;
 296         } else {
 297                 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
 298                     bnx2i_conn->ep->qp.sq_last_qe)
 299                         bnx2i_conn->ep->qp.sq_prod_qe += count;
 300                 else {
 301                         tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
 302                                 bnx2i_conn->ep->qp.sq_prod_qe;
 303                         bnx2i_conn->ep->qp.sq_prod_qe =
 304                                 &bnx2i_conn->ep->qp.sq_first_qe[count -
 305                                                                 (tmp_cnt + 1)];
 306                 }
 307         }
 308         bnx2i_conn->ep->qp.sq_prod_idx += count;
 309         /* Ring the doorbell */
 310         bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
 311 }
 312
 313
 314 /**
 315  * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
 316  * @conn:       iscsi connection
 317  * @cmd:        driver command structure which is requesting
 318  *              a WQE to sent to chip for further processing
 319  *
 320  * prepare and post an iSCSI Login request WQE to CNIC firmware
 321  */
 322 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
 323                            struct iscsi_task *task)
 324 {
 325         struct bnx2i_cmd *bnx2i_cmd;
 326         struct bnx2i_login_request *login_wqe;
 327         struct iscsi_login *login_hdr;
 328         u32 dword;
 329
 330         bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 331         login_hdr = (struct iscsi_login *)task->hdr;
 332         login_wqe = (struct bnx2i_login_request *)
 333                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 334
 335         login_wqe->op_code = login_hdr->opcode;
 336         login_wqe->op_attr = login_hdr->flags;
 337         login_wqe->version_max = login_hdr->max_version;
 338         login_wqe->version_min = login_hdr->min_version;
 339         login_wqe->data_length = ntoh24(login_hdr->dlength);
 340         login_wqe->isid_lo = *((u32 *) login_hdr->isid);
 341         login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
 342         login_wqe->tsih = login_hdr->tsih;
 343         login_wqe->itt = task->itt |
 344                 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
 345         login_wqe->cid = login_hdr->cid;
 346
 347         login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
 348         login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
 349
 350         login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
 351         login_wqe->resp_bd_list_addr_hi =
 352                 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
 353
 354         dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
 355                  (bnx2i_conn->gen_pdu.resp_buf_size <<
 356                   ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
 357         login_wqe->resp_buffer = dword;
 358         login_wqe->flags = 0;
 359         login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
 360         login_wqe->bd_list_addr_hi =
 361                 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
 362         login_wqe->num_bds = 1;
 363         login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 364
 365         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 366         return 0;
 367 }
 368
 369 /**
 370  * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
 371  * @conn:       iscsi connection
 372  * @mtask:      driver command structure which is requesting
 373  *              a WQE to sent to chip for further processing
 374  *
 375  * prepare and post an iSCSI Login request WQE to CNIC firmware
 376  */
 377 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
 378                          struct iscsi_task *mtask)
 379 {
 380         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
 381         struct iscsi_tm *tmfabort_hdr;
 382         struct scsi_cmnd *ref_sc;
 383         struct iscsi_task *ctask;
 384         struct bnx2i_cmd *bnx2i_cmd;
 385         struct bnx2i_tmf_request *tmfabort_wqe;
 386         u32 dword;
 387         u32 scsi_lun[2];
 388
 389         bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
 390         tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
 391         tmfabort_wqe = (struct bnx2i_tmf_request *)
 392                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 393
 394         tmfabort_wqe->op_code = tmfabort_hdr->opcode;
 395         tmfabort_wqe->op_attr = 0;
 396         tmfabort_wqe->op_attr =
 397                 ISCSI_TMF_REQUEST_ALWAYS_ONE | ISCSI_TM_FUNC_ABORT_TASK;
 398
 399         tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
 400         tmfabort_wqe->reserved2 = 0;
 401         tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
 402
 403         ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
 404         if (!ctask || !ctask->sc)
 405                 /*
 406                  * the iscsi layer must have completed the cmd while this
 407                  * was starting up.
 408                  *
 409                  * Note: In the case of a SCSI cmd timeout, the task's sc
 410                  *       is still active; hence ctask->sc != 0
 411                  *       In this case, the task must be aborted
 412                  */
 413                 return 0;
 414
 415         ref_sc = ctask->sc;
 416
 417         /* Retrieve LUN directly from the ref_sc */
 418         int_to_scsilun(ref_sc->device->lun, (struct scsi_lun *) scsi_lun);
 419         tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
 420         tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
 421
 422         if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
 423                 dword = (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
 424         else
 425                 dword = (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
 426         tmfabort_wqe->ref_itt = (dword | (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
 427         tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
 428
 429         tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
 430         tmfabort_wqe->bd_list_addr_hi = (u32)
 431                                 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 432         tmfabort_wqe->num_bds = 1;
 433         tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 434
 435         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 436         return 0;
 437 }
 438
 439 /**
 440  * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
 441  * @conn:       iscsi connection
 442  * @cmd:        driver command structure which is requesting
 443  *              a WQE to sent to chip for further processing
 444  *
 445  * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
 446  */
 447 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
 448                              struct bnx2i_cmd *cmd)
 449 {
 450         struct bnx2i_cmd_request *scsi_cmd_wqe;
 451
 452         scsi_cmd_wqe = (struct bnx2i_cmd_request *)
 453                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 454         memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
 455         scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 456
 457         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 458         return 0;
 459 }
 460
 461 /**
 462  * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
 463  * @conn:               iscsi connection
 464  * @cmd:                driver command structure which is requesting
 465  *                      a WQE to sent to chip for further processing
 466  * @ttt:                TTT to be used when building pdu header
 467  * @datap:              payload buffer pointer
 468  * @data_len:           payload data length
 469  * @unsol:              indicated whether nopout pdu is unsolicited pdu or
 470  *                      in response to target's NOPIN w/ TTT != FFFFFFFF
 471  *
 472  * prepare and post a nopout request WQE to CNIC firmware
 473  */
 474 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
 475                             struct iscsi_task *task, u32 ttt,
 476                             char *datap, int data_len, int unsol)
 477 {
 478         struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 479         struct bnx2i_cmd *bnx2i_cmd;
 480         struct bnx2i_nop_out_request *nopout_wqe;
 481         struct iscsi_nopout *nopout_hdr;
 482
 483         bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 484         nopout_hdr = (struct iscsi_nopout *)task->hdr;
 485         nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
 486         nopout_wqe->op_code = nopout_hdr->opcode;
 487         nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
 488         memcpy(nopout_wqe->lun, nopout_hdr->lun, 8);
 489
 490         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 491                 u32 tmp = nopout_hdr->lun[0];
 492                 /* 57710 requires LUN field to be swapped */
 493                 nopout_hdr->lun[0] = nopout_hdr->lun[1];
 494                 nopout_hdr->lun[1] = tmp;
 495         }
 496
 497         nopout_wqe->itt = ((u16)task->itt |
 498                            (ISCSI_TASK_TYPE_MPATH <<
 499                             ISCSI_TMF_REQUEST_TYPE_SHIFT));
 500         nopout_wqe->ttt = ttt;
 501         nopout_wqe->flags = 0;
 502         if (!unsol)
 503                 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
 504         else if (nopout_hdr->itt == RESERVED_ITT)
 505                 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
 506
 507         nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
 508         nopout_wqe->data_length = data_len;
 509         if (data_len) {
 510                 /* handle payload data, not required in first release */
 511                 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
 512         } else {
 513                 nopout_wqe->bd_list_addr_lo = (u32)
 514                                         bnx2i_conn->hba->mp_bd_dma;
 515                 nopout_wqe->bd_list_addr_hi =
 516                         (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 517                 nopout_wqe->num_bds = 1;
 518         }
 519         nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 520
 521         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 522         return 0;
 523 }
 524
 525
 526 /**
 527  * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
 528  * @conn:       iscsi connection
 529  * @cmd:        driver command structure which is requesting
 530  *              a WQE to sent to chip for further processing
 531  *
 532  * prepare and post logout request WQE to CNIC firmware
 533  */
 534 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
 535                             struct iscsi_task *task)
 536 {
 537         struct bnx2i_cmd *bnx2i_cmd;
 538         struct bnx2i_logout_request *logout_wqe;
 539         struct iscsi_logout *logout_hdr;
 540
 541         bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 542         logout_hdr = (struct iscsi_logout *)task->hdr;
 543
 544         logout_wqe = (struct bnx2i_logout_request *)
 545                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 546         memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
 547
 548         logout_wqe->op_code = logout_hdr->opcode;
 549         logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
 550         logout_wqe->op_attr =
 551                         logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
 552         logout_wqe->itt = ((u16)task->itt |
 553                            (ISCSI_TASK_TYPE_MPATH <<
 554                             ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
 555         logout_wqe->data_length = 0;
 556         logout_wqe->cid = 0;
 557
 558         logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
 559         logout_wqe->bd_list_addr_hi = (u32)
 560                                 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 561         logout_wqe->num_bds = 1;
 562         logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 563
 564         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 565         return 0;
 566 }
 567
 568
 569 /**
 570  * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
 571  * @conn:       iscsi connection which requires iscsi parameter update
 572  *
 573  * sends down iSCSI Conn Update request to move iSCSI conn to FFP
 574  */
 575 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
 576 {
 577         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
 578         struct bnx2i_hba *hba = bnx2i_conn->hba;
 579         struct kwqe *kwqe_arr[2];
 580         struct iscsi_kwqe_conn_update *update_wqe;
 581         struct iscsi_kwqe_conn_update conn_update_kwqe;
 582
 583         update_wqe = &conn_update_kwqe;
 584
 585         update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
 586         update_wqe->hdr.flags =
 587                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 588
 589         /* 5771x requires conn context id to be passed as is */
 590         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
 591                 update_wqe->context_id = bnx2i_conn->ep->ep_cid;
 592         else
 593                 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
 594         update_wqe->conn_flags = 0;
 595         if (conn->hdrdgst_en)
 596                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
 597         if (conn->datadgst_en)
 598                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
 599         if (conn->session->initial_r2t_en)
 600                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
 601         if (conn->session->imm_data_en)
 602                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
 603
 604         update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
 605         update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
 606         update_wqe->first_burst_length = conn->session->first_burst;
 607         update_wqe->max_burst_length = conn->session->max_burst;
 608         update_wqe->exp_stat_sn = conn->exp_statsn;
 609         update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
 610         update_wqe->session_error_recovery_level = conn->session->erl;
 611         iscsi_conn_printk(KERN_ALERT, conn,
 612                           "bnx2i: conn update - MBL 0x%x FBL 0x%x"
 613                           "MRDSL_I 0x%x MRDSL_T 0x%x \n",
 614                           update_wqe->max_burst_length,
 615                           update_wqe->first_burst_length,
 616                           update_wqe->max_recv_pdu_length,
 617                           update_wqe->max_send_pdu_length);
 618
 619         kwqe_arr[0] = (struct kwqe *) update_wqe;
 620         if (hba->cnic && hba->cnic->submit_kwqes)
 621                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
 622 }
 623
 624
 625 /**
 626  * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
 627  * @data:       endpoint (transport handle) structure pointer
 628  *
 629  * routine to handle connection offload/destroy request timeout
 630  */
 631 void bnx2i_ep_ofld_timer(unsigned long data)
 632 {
 633         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;
 634
 635         if (ep->state == EP_STATE_OFLD_START) {
 636                 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
 637                 ep->state = EP_STATE_OFLD_FAILED;
 638         } else if (ep->state == EP_STATE_DISCONN_START) {
 639                 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
 640                 ep->state = EP_STATE_DISCONN_TIMEDOUT;
 641         } else if (ep->state == EP_STATE_CLEANUP_START) {
 642                 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
 643                 ep->state = EP_STATE_CLEANUP_FAILED;
 644         }
 645
 646         wake_up_interruptible(&ep->ofld_wait);
 647 }
 648
 649
 650 static int bnx2i_power_of2(u32 val)
 651 {
 652         u32 power = 0;
 653         if (val & (val - 1))
 654                 return power;
 655         val--;
 656         while (val) {
 657                 val = val >> 1;
 658                 power++;
 659         }
 660         return power;
 661 }
 662
 663
 664 /**
 665  * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
 666  * @hba:        adapter structure pointer
 667  * @cmd:        driver command structure which is requesting
 668  *              a WQE to sent to chip for further processing
 669  *
 670  * prepares and posts CONN_OFLD_REQ1/2 KWQE
 671  */
 672 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
 673 {
 674         struct bnx2i_cleanup_request *cmd_cleanup;
 675
 676         cmd_cleanup =
 677                 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
 678         memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
 679
 680         cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
 681         cmd_cleanup->itt = cmd->req.itt;
 682         cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
 683
 684         bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
 685 }
 686
 687
 688 /**
 689  * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
 690  * @hba:        adapter structure pointer
 691  * @ep:         endpoint (transport indentifier) structure
 692  *
 693  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
 694  *      iscsi connection context clean-up process
 695  */
 696 void bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 697 {
 698         struct kwqe *kwqe_arr[2];
 699         struct iscsi_kwqe_conn_destroy conn_cleanup;
 700
 701         memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
 702
 703         conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
 704         conn_cleanup.hdr.flags =
 705                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 706         /* 5771x requires conn context id to be passed as is */
 707         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 708                 conn_cleanup.context_id = ep->ep_cid;
 709         else
 710                 conn_cleanup.context_id = (ep->ep_cid >> 7);
 711
 712         conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
 713
 714         kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
 715         if (hba->cnic && hba->cnic->submit_kwqes)
 716                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
 717 }
 718
 719
 720 /**
 721  * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
 722  * @hba:                adapter structure pointer
 723  * @ep:                 endpoint (transport indentifier) structure
 724  *
 725  * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 726  */
 727 static void bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
 728                                           struct bnx2i_endpoint *ep)
 729 {
 730         struct kwqe *kwqe_arr[2];
 731         struct iscsi_kwqe_conn_offload1 ofld_req1;
 732         struct iscsi_kwqe_conn_offload2 ofld_req2;
 733         dma_addr_t dma_addr;
 734         int num_kwqes = 2;
 735         u32 *ptbl;
 736
 737         ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
 738         ofld_req1.hdr.flags =
 739                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 740
 741         ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
 742
 743         dma_addr = ep->qp.sq_pgtbl_phys;
 744         ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
 745         ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 746
 747         dma_addr = ep->qp.cq_pgtbl_phys;
 748         ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
 749         ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 750
 751         ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
 752         ofld_req2.hdr.flags =
 753                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 754
 755         dma_addr = ep->qp.rq_pgtbl_phys;
 756         ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
 757         ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 758
 759         ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
 760
 761         ofld_req2.sq_first_pte.hi = *ptbl++;
 762         ofld_req2.sq_first_pte.lo = *ptbl;
 763
 764         ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
 765         ofld_req2.cq_first_pte.hi = *ptbl++;
 766         ofld_req2.cq_first_pte.lo = *ptbl;
 767
 768         kwqe_arr[0] = (struct kwqe *) &ofld_req1;
 769         kwqe_arr[1] = (struct kwqe *) &ofld_req2;
 770         ofld_req2.num_additional_wqes = 0;
 771
 772         if (hba->cnic && hba->cnic->submit_kwqes)
 773                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
 774 }
 775
 776
 777 /**
 778  * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
 779  * @hba:                adapter structure pointer
 780  * @ep:                 endpoint (transport indentifier) structure
 781  *
 782  * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 783  */
 784 static void bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
 785                                            struct bnx2i_endpoint *ep)
 786 {
 787         struct kwqe *kwqe_arr[5];
 788         struct iscsi_kwqe_conn_offload1 ofld_req1;
 789         struct iscsi_kwqe_conn_offload2 ofld_req2;
 790         struct iscsi_kwqe_conn_offload3 ofld_req3[1];
 791         dma_addr_t dma_addr;
 792         int num_kwqes = 2;
 793         u32 *ptbl;
 794
 795         ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
 796         ofld_req1.hdr.flags =
 797                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 798
 799         ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
 800
 801         dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
 802         ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
 803         ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 804
 805         dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
 806         ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
 807         ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 808
 809         ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
 810         ofld_req2.hdr.flags =
 811                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 812
 813         dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
 814         ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
 815         ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 816
 817         ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
 818         ofld_req2.sq_first_pte.hi = *ptbl++;
 819         ofld_req2.sq_first_pte.lo = *ptbl;
 820
 821         ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
 822         ofld_req2.cq_first_pte.hi = *ptbl++;
 823         ofld_req2.cq_first_pte.lo = *ptbl;
 824
 825         kwqe_arr[0] = (struct kwqe *) &ofld_req1;
 826         kwqe_arr[1] = (struct kwqe *) &ofld_req2;
 827
 828         ofld_req2.num_additional_wqes = 1;
 829         memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
 830         ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
 831         ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
 832         ofld_req3[0].qp_first_pte[0].lo = *ptbl;
 833
 834         kwqe_arr[2] = (struct kwqe *) ofld_req3;
 835         /* need if we decide to go with multiple KCQE's per conn */
 836         num_kwqes += 1;
 837
 838         if (hba->cnic && hba->cnic->submit_kwqes)
 839                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
 840 }
 841
 842 /**
 843  * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
 844  *
 845  * @hba:                adapter structure pointer
 846  * @ep:                 endpoint (transport indentifier) structure
 847  *
 848  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
 849  */
 850 void bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 851 {
 852         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
 853                 bnx2i_5771x_send_conn_ofld_req(hba, ep);
 854         else
 855                 bnx2i_570x_send_conn_ofld_req(hba, ep);
 856 }
 857
 858
 859 /**
 860  * setup_qp_page_tables - iscsi QP page table setup function
 861  * @ep:         endpoint (transport indentifier) structure
 862  *
 863  * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
 864  *      64-bit address in big endian format. Whereas 10G/sec (57710) requires
 865  *      PT in little endian format
 866  */
 867 static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
 868 {
 869         int num_pages;
 870         u32 *ptbl;
 871         dma_addr_t page;
 872         int cnic_dev_10g;
 873
 874         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 875                 cnic_dev_10g = 1;
 876         else
 877                 cnic_dev_10g = 0;
 878
 879         /* SQ page table */
 880         memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
 881         num_pages = ep->qp.sq_mem_size / PAGE_SIZE;
 882         page = ep->qp.sq_phys;
 883
 884         if (cnic_dev_10g)
 885                 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
 886         else
 887                 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
 888         while (num_pages--) {
 889                 if (cnic_dev_10g) {
 890                         /* PTE is written in little endian format for 57710 */
 891                         *ptbl = (u32) page;
 892                         ptbl++;
 893                         *ptbl = (u32) ((u64) page >> 32);
 894                         ptbl++;
 895                         page += PAGE_SIZE;
 896                 } else {
 897                         /* PTE is written in big endian format for
 898                          * 5706/5708/5709 devices */
 899                         *ptbl = (u32) ((u64) page >> 32);
 900                         ptbl++;
 901                         *ptbl = (u32) page;
 902                         ptbl++;
 903                         page += PAGE_SIZE;
 904                 }
 905         }
 906
 907         /* RQ page table */
 908         memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
 909         num_pages = ep->qp.rq_mem_size / PAGE_SIZE;
 910         page = ep->qp.rq_phys;
 911
 912         if (cnic_dev_10g)
 913                 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
 914         else
 915                 ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
 916         while (num_pages--) {
 917                 if (cnic_dev_10g) {
 918                         /* PTE is written in little endian format for 57710 */
 919                         *ptbl = (u32) page;
 920                         ptbl++;
 921                         *ptbl = (u32) ((u64) page >> 32);
 922                         ptbl++;
 923                         page += PAGE_SIZE;
 924                 } else {
 925                         /* PTE is written in big endian format for
 926                          * 5706/5708/5709 devices */
 927                         *ptbl = (u32) ((u64) page >> 32);
 928                         ptbl++;
 929                         *ptbl = (u32) page;
 930                         ptbl++;
 931                         page += PAGE_SIZE;
 932                 }
 933         }
 934
 935         /* CQ page table */
 936         memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
 937         num_pages = ep->qp.cq_mem_size / PAGE_SIZE;
 938         page = ep->qp.cq_phys;
 939
 940         if (cnic_dev_10g)
 941                 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
 942         else
 943                 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
 944         while (num_pages--) {
 945                 if (cnic_dev_10g) {
 946                         /* PTE is written in little endian format for 57710 */
 947                         *ptbl = (u32) page;
 948                         ptbl++;
 949                         *ptbl = (u32) ((u64) page >> 32);
 950                         ptbl++;
 951                         page += PAGE_SIZE;
 952                 } else {
 953                         /* PTE is written in big endian format for
 954                          * 5706/5708/5709 devices */
 955                         *ptbl = (u32) ((u64) page >> 32);
 956                         ptbl++;
 957                         *ptbl = (u32) page;
 958                         ptbl++;
 959                         page += PAGE_SIZE;
 960                 }
 961         }
 962 }
 963
 964
 965 /**
 966  * bnx2i_alloc_qp_resc - allocates required resources for QP.
 967  * @hba:        adapter structure pointer
 968  * @ep:         endpoint (transport indentifier) structure
 969  *
 970  * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
 971  *      memory for SQ/RQ/CQ and page tables. EP structure elements such
 972  *      as producer/consumer indexes/pointers, queue sizes and page table
 973  *      contents are setup
 974  */
 975 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 976 {
 977         struct bnx2i_5771x_cq_db *cq_db;
 978
 979         ep->hba = hba;
 980         ep->conn = NULL;
 981         ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
 982
 983         /* Allocate page table memory for SQ which is page aligned */
 984         ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
 985         ep->qp.sq_mem_size =
 986                 (ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 987         ep->qp.sq_pgtbl_size =
 988                 (ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *);
 989         ep->qp.sq_pgtbl_size =
 990                 (ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 991
 992         ep->qp.sq_pgtbl_virt =
 993                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
 994                                    &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
 995         if (!ep->qp.sq_pgtbl_virt) {
 996                 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
 997                                   ep->qp.sq_pgtbl_size);
 998                 goto mem_alloc_err;
 999         }
1000
1001         /* Allocate memory area for actual SQ element */
1002         ep->qp.sq_virt =
1003                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1004                                    &ep->qp.sq_phys, GFP_KERNEL);
1005         if (!ep->qp.sq_virt) {
1006                 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1007                                   ep->qp.sq_mem_size);
1008                 goto mem_alloc_err;
1009         }
1010
1011         memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
1012         ep->qp.sq_first_qe = ep->qp.sq_virt;
1013         ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1014         ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1015         ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1016         ep->qp.sq_prod_idx = 0;
1017         ep->qp.sq_cons_idx = 0;
1018         ep->qp.sqe_left = hba->max_sqes;
1019
1020         /* Allocate page table memory for CQ which is page aligned */
1021         ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1022         ep->qp.cq_mem_size =
1023                 (ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1024         ep->qp.cq_pgtbl_size =
1025                 (ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *);
1026         ep->qp.cq_pgtbl_size =
1027                 (ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1028
1029         ep->qp.cq_pgtbl_virt =
1030                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1031                                    &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1032         if (!ep->qp.cq_pgtbl_virt) {
1033                 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1034                                   ep->qp.cq_pgtbl_size);
1035                 goto mem_alloc_err;
1036         }
1037
1038         /* Allocate memory area for actual CQ element */
1039         ep->qp.cq_virt =
1040                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1041                                    &ep->qp.cq_phys, GFP_KERNEL);
1042         if (!ep->qp.cq_virt) {
1043                 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1044                                   ep->qp.cq_mem_size);
1045                 goto mem_alloc_err;
1046         }
1047         memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
1048
1049         ep->qp.cq_first_qe = ep->qp.cq_virt;
1050         ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1051         ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1052         ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1053         ep->qp.cq_prod_idx = 0;
1054         ep->qp.cq_cons_idx = 0;
1055         ep->qp.cqe_left = hba->max_cqes;
1056         ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1057         ep->qp.cqe_size = hba->max_cqes;
1058
1059         /* Invalidate all EQ CQE index, req only for 57710 */
1060         cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1061         memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1062
1063         /* Allocate page table memory for RQ which is page aligned */
1064         ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1065         ep->qp.rq_mem_size =
1066                 (ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1067         ep->qp.rq_pgtbl_size =
1068                 (ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *);
1069         ep->qp.rq_pgtbl_size =
1070                 (ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1071
1072         ep->qp.rq_pgtbl_virt =
1073                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1074                                    &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1075         if (!ep->qp.rq_pgtbl_virt) {
1076                 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1077                                   ep->qp.rq_pgtbl_size);
1078                 goto mem_alloc_err;
1079         }
1080
1081         /* Allocate memory area for actual RQ element */
1082         ep->qp.rq_virt =
1083                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1084                                    &ep->qp.rq_phys, GFP_KERNEL);
1085         if (!ep->qp.rq_virt) {
1086                 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1087                                   ep->qp.rq_mem_size);
1088                 goto mem_alloc_err;
1089         }
1090
1091         ep->qp.rq_first_qe = ep->qp.rq_virt;
1092         ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1093         ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1094         ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1095         ep->qp.rq_prod_idx = 0x8000;
1096         ep->qp.rq_cons_idx = 0;
1097         ep->qp.rqe_left = hba->max_rqes;
1098
1099         setup_qp_page_tables(ep);
1100
1101         return 0;
1102
1103 mem_alloc_err:
1104         bnx2i_free_qp_resc(hba, ep);
1105         return -ENOMEM;
1106 }
1107
1108
1109
1110 /**
1111  * bnx2i_free_qp_resc - free memory resources held by QP
1112  * @hba:        adapter structure pointer
1113  * @ep: endpoint (transport indentifier) structure
1114  *
1115  * Free QP resources - SQ/RQ/CQ memory and page tables.
1116  */
1117 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1118 {
1119         if (ep->qp.ctx_base) {
1120                 iounmap(ep->qp.ctx_base);
1121                 ep->qp.ctx_base = NULL;
1122         }
1123         /* Free SQ mem */
1124         if (ep->qp.sq_pgtbl_virt) {
1125                 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1126                                   ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1127                 ep->qp.sq_pgtbl_virt = NULL;
1128                 ep->qp.sq_pgtbl_phys = 0;
1129         }
1130         if (ep->qp.sq_virt) {
1131                 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1132                                   ep->qp.sq_virt, ep->qp.sq_phys);
1133                 ep->qp.sq_virt = NULL;
1134                 ep->qp.sq_phys = 0;
1135         }
1136
1137         /* Free RQ mem */
1138         if (ep->qp.rq_pgtbl_virt) {
1139                 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1140                                   ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1141                 ep->qp.rq_pgtbl_virt = NULL;
1142                 ep->qp.rq_pgtbl_phys = 0;
1143         }
1144         if (ep->qp.rq_virt) {
1145                 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1146                                   ep->qp.rq_virt, ep->qp.rq_phys);
1147                 ep->qp.rq_virt = NULL;
1148                 ep->qp.rq_phys = 0;
1149         }
1150
1151         /* Free CQ mem */
1152         if (ep->qp.cq_pgtbl_virt) {
1153                 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1154                                   ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1155                 ep->qp.cq_pgtbl_virt = NULL;
1156                 ep->qp.cq_pgtbl_phys = 0;
1157         }
1158         if (ep->qp.cq_virt) {
1159                 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1160                                   ep->qp.cq_virt, ep->qp.cq_phys);
1161                 ep->qp.cq_virt = NULL;
1162                 ep->qp.cq_phys = 0;
1163         }
1164 }
1165
1166
1167 /**
1168  * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1169  * @hba:        adapter structure pointer
1170  *
1171  * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1172  *      This results in iSCSi support validation and on-chip context manager
1173  *      initialization.  Firmware completes this handshake with a CQE carrying
1174  *      the result of iscsi support validation. Parameter carried by
1175  *      iscsi init request determines the number of offloaded connection and
1176  *      tolerance level for iscsi protocol violation this hba/chip can support
1177  */
1178 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1179 {
1180         struct kwqe *kwqe_arr[3];
1181         struct iscsi_kwqe_init1 iscsi_init;
1182         struct iscsi_kwqe_init2 iscsi_init2;
1183         int rc = 0;
1184         u64 mask64;
1185
1186         bnx2i_adjust_qp_size(hba);
1187
1188         iscsi_init.flags =
1189                 ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1190         if (en_tcp_dack)
1191                 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1192         iscsi_init.reserved0 = 0;
1193         iscsi_init.num_cqs = 1;
1194         iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1195         iscsi_init.hdr.flags =
1196                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1197
1198         iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1199         iscsi_init.dummy_buffer_addr_hi =
1200                 (u32) ((u64) hba->dummy_buf_dma >> 32);
1201
1202         hba->ctx_ccell_tasks =
1203                         ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1204         iscsi_init.num_ccells_per_conn = hba->num_ccell;
1205         iscsi_init.num_tasks_per_conn = hba->max_sqes;
1206         iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1207         iscsi_init.sq_num_wqes = hba->max_sqes;
1208         iscsi_init.cq_log_wqes_per_page =
1209                 (u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE);
1210         iscsi_init.cq_num_wqes = hba->max_cqes;
1211         iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1212                                    (PAGE_SIZE - 1)) / PAGE_SIZE;
1213         iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1214                                    (PAGE_SIZE - 1)) / PAGE_SIZE;
1215         iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1216         iscsi_init.rq_num_wqes = hba->max_rqes;
1217
1218
1219         iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1220         iscsi_init2.hdr.flags =
1221                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1222         iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1223         mask64 = 0x0ULL;
1224         mask64 |= (
1225                 /* CISCO MDS */
1226                 (1UL <<
1227                   ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1228                 /* HP MSA1510i */
1229                 (1UL <<
1230                   ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1231                 /* EMC */
1232                 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1233         if (error_mask1)
1234                 iscsi_init2.error_bit_map[0] = error_mask1;
1235         else
1236                 iscsi_init2.error_bit_map[0] = (u32) mask64;
1237
1238         if (error_mask2)
1239                 iscsi_init2.error_bit_map[1] = error_mask2;
1240         else
1241                 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1242
1243         iscsi_error_mask = mask64;
1244
1245         kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1246         kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1247
1248         if (hba->cnic && hba->cnic->submit_kwqes)
1249                 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1250         return rc;
1251 }
1252
1253
1254 /**
1255  * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1256  * @conn:       iscsi connection
1257  * @cqe:        pointer to newly DMA'ed CQE entry for processing
1258  *
1259  * process SCSI CMD Response CQE & complete the request to SCSI-ML
1260  */
1261 static int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1262                                        struct bnx2i_conn *bnx2i_conn,
1263                                        struct cqe *cqe)
1264 {
1265         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1266         struct bnx2i_cmd_response *resp_cqe;
1267         struct bnx2i_cmd *bnx2i_cmd;
1268         struct iscsi_task *task;
1269         struct iscsi_cmd_rsp *hdr;
1270         u32 datalen = 0;
1271
1272         resp_cqe = (struct bnx2i_cmd_response *)cqe;
1273         spin_lock(&session->lock);
1274         task = iscsi_itt_to_task(conn,
1275                                  resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1276         if (!task)
1277                 goto fail;
1278
1279         bnx2i_cmd = task->dd_data;
1280
1281         if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1282                 conn->datain_pdus_cnt +=
1283                         resp_cqe->task_stat.read_stat.num_data_outs;
1284                 conn->rxdata_octets +=
1285                         bnx2i_cmd->req.total_data_transfer_length;
1286         } else {
1287                 conn->dataout_pdus_cnt +=
1288                         resp_cqe->task_stat.read_stat.num_data_outs;
1289                 conn->r2t_pdus_cnt +=
1290                         resp_cqe->task_stat.read_stat.num_r2ts;
1291                 conn->txdata_octets +=
1292                         bnx2i_cmd->req.total_data_transfer_length;
1293         }
1294         bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1295
1296         hdr = (struct iscsi_cmd_rsp *)task->hdr;
1297         resp_cqe = (struct bnx2i_cmd_response *)cqe;
1298         hdr->opcode = resp_cqe->op_code;
1299         hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1300         hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1301         hdr->response = resp_cqe->response;
1302         hdr->cmd_status = resp_cqe->status;
1303         hdr->flags = resp_cqe->response_flags;
1304         hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1305
1306         if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1307                 goto done;
1308
1309         if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1310                 datalen = resp_cqe->data_length;
1311                 if (datalen < 2)
1312                         goto done;
1313
1314                 if (datalen > BNX2I_RQ_WQE_SIZE) {
1315                         iscsi_conn_printk(KERN_ERR, conn,
1316                                           "sense data len %d > RQ sz\n",
1317                                           datalen);
1318                         datalen = BNX2I_RQ_WQE_SIZE;
1319                 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1320                         iscsi_conn_printk(KERN_ERR, conn,
1321                                           "sense data len %d > conn data\n",
1322                                           datalen);
1323                         datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1324                 }
1325
1326                 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1327                 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1328         }
1329
1330 done:
1331         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1332                              conn->data, datalen);
1333 fail:
1334         spin_unlock(&session->lock);
1335         return 0;
1336 }
1337
1338
1339 /**
1340  * bnx2i_process_login_resp - this function handles iscsi login response
1341  * @session:            iscsi session pointer
1342  * @bnx2i_conn:         iscsi connection pointer
1343  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1344  *
1345  * process Login Response CQE & complete it to open-iscsi user daemon
1346  */
1347 static int bnx2i_process_login_resp(struct iscsi_session *session,
1348                                     struct bnx2i_conn *bnx2i_conn,
1349                                     struct cqe *cqe)
1350 {
1351         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1352         struct iscsi_task *task;
1353         struct bnx2i_login_response *login;
1354         struct iscsi_login_rsp *resp_hdr;
1355         int pld_len;
1356         int pad_len;
1357
1358         login = (struct bnx2i_login_response *) cqe;
1359         spin_lock(&session->lock);
1360         task = iscsi_itt_to_task(conn,
1361                                  login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1362         if (!task)
1363                 goto done;
1364
1365         resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1366         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1367         resp_hdr->opcode = login->op_code;
1368         resp_hdr->flags = login->response_flags;
1369         resp_hdr->max_version = login->version_max;
1370         resp_hdr->active_version = login->version_active;
1371         resp_hdr->hlength = 0;
1372
1373         hton24(resp_hdr->dlength, login->data_length);
1374         memcpy(resp_hdr->isid, &login->isid_lo, 6);
1375         resp_hdr->tsih = cpu_to_be16(login->tsih);
1376         resp_hdr->itt = task->hdr->itt;
1377         resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1378         resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1379         resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1380         resp_hdr->status_class = login->status_class;
1381         resp_hdr->status_detail = login->status_detail;
1382         pld_len = login->data_length;
1383         bnx2i_conn->gen_pdu.resp_wr_ptr =
1384                                         bnx2i_conn->gen_pdu.resp_buf + pld_len;
1385
1386         pad_len = 0;
1387         if (pld_len & 0x3)
1388                 pad_len = 4 - (pld_len % 4);
1389
1390         if (pad_len) {
1391                 int i = 0;
1392                 for (i = 0; i < pad_len; i++) {
1393                         bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1394                         bnx2i_conn->gen_pdu.resp_wr_ptr++;
1395                 }
1396         }
1397
1398         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1399                 bnx2i_conn->gen_pdu.resp_buf,
1400                 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1401 done:
1402         spin_unlock(&session->lock);
1403         return 0;
1404 }
1405
1406 /**
1407  * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1408  * @session:            iscsi session pointer
1409  * @bnx2i_conn:         iscsi connection pointer
1410  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1411  *
1412  * process iSCSI TMF Response CQE and wake up the driver eh thread.
1413  */
1414 static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1415                                   struct bnx2i_conn *bnx2i_conn,
1416                                   struct cqe *cqe)
1417 {
1418         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1419         struct iscsi_task *task;
1420         struct bnx2i_tmf_response *tmf_cqe;
1421         struct iscsi_tm_rsp *resp_hdr;
1422
1423         tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1424         spin_lock(&session->lock);
1425         task = iscsi_itt_to_task(conn,
1426                                  tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1427         if (!task)
1428                 goto done;
1429
1430         resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1431         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1432         resp_hdr->opcode = tmf_cqe->op_code;
1433         resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1434         resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1435         resp_hdr->itt = task->hdr->itt;
1436         resp_hdr->response = tmf_cqe->response;
1437
1438         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1439 done:
1440         spin_unlock(&session->lock);
1441         return 0;
1442 }
1443
1444 /**
1445  * bnx2i_process_logout_resp - this function handles iscsi logout response
1446  * @session:            iscsi session pointer
1447  * @bnx2i_conn:         iscsi connection pointer
1448  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1449  *
1450  * process iSCSI Logout Response CQE & make function call to
1451  * notify the user daemon.
1452  */
1453 static int bnx2i_process_logout_resp(struct iscsi_session *session,
1454                                      struct bnx2i_conn *bnx2i_conn,
1455                                      struct cqe *cqe)
1456 {
1457         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1458         struct iscsi_task *task;
1459         struct bnx2i_logout_response *logout;
1460         struct iscsi_logout_rsp *resp_hdr;
1461
1462         logout = (struct bnx2i_logout_response *) cqe;
1463         spin_lock(&session->lock);
1464         task = iscsi_itt_to_task(conn,
1465                                  logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1466         if (!task)
1467                 goto done;
1468
1469         resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1470         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1471         resp_hdr->opcode = logout->op_code;
1472         resp_hdr->flags = logout->response;
1473         resp_hdr->hlength = 0;
1474
1475         resp_hdr->itt = task->hdr->itt;
1476         resp_hdr->statsn = task->hdr->exp_statsn;
1477         resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1478         resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1479
1480         resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1481         resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1482
1483         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1484 done:
1485         spin_unlock(&session->lock);
1486         return 0;
1487 }
1488
1489 /**
1490  * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1491  * @session:            iscsi session pointer
1492  * @bnx2i_conn:         iscsi connection pointer
1493  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1494  *
1495  * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1496  */
1497 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1498                                            struct bnx2i_conn *bnx2i_conn,
1499                                            struct cqe *cqe)
1500 {
1501         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1502         struct bnx2i_nop_in_msg *nop_in;
1503         struct iscsi_task *task;
1504
1505         nop_in = (struct bnx2i_nop_in_msg *)cqe;
1506         spin_lock(&session->lock);
1507         task = iscsi_itt_to_task(conn,
1508                                  nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1509         if (task)
1510                 iscsi_put_task(task);
1511         spin_unlock(&session->lock);
1512 }
1513
1514 /**
1515  * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1516  * @conn:       iscsi connection
1517  *
1518  * Firmware advances RQ producer index for every unsolicited PDU even if
1519  *      payload data length is '0'. This function makes corresponding
1520  *      adjustments on the driver side to match this f/w behavior
1521  */
1522 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1523 {
1524         char dummy_rq_data[2];
1525         bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1526         bnx2i_put_rq_buf(bnx2i_conn, 1);
1527 }
1528
1529
1530 /**
1531  * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1532  * @session:            iscsi session pointer
1533  * @bnx2i_conn:         iscsi connection pointer
1534  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1535  *
1536  * process iSCSI target's proactive iSCSI NOPIN request
1537  */
1538 static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1539                                      struct bnx2i_conn *bnx2i_conn,
1540                                      struct cqe *cqe)
1541 {
1542         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1543         struct iscsi_task *task;
1544         struct bnx2i_nop_in_msg *nop_in;
1545         struct iscsi_nopin *hdr;
1546         u32 itt;
1547         int tgt_async_nop = 0;
1548
1549         nop_in = (struct bnx2i_nop_in_msg *)cqe;
1550         itt = nop_in->itt & ISCSI_NOP_IN_MSG_INDEX;
1551
1552         spin_lock(&session->lock);
1553         hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1554         memset(hdr, 0, sizeof(struct iscsi_hdr));
1555         hdr->opcode = nop_in->op_code;
1556         hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1557         hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1558         hdr->ttt = cpu_to_be32(nop_in->ttt);
1559
1560         if (itt == (u16) RESERVED_ITT) {
1561                 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1562                 hdr->itt = RESERVED_ITT;
1563                 tgt_async_nop = 1;
1564                 goto done;
1565         }
1566
1567         /* this is a response to one of our nop-outs */
1568         task = iscsi_itt_to_task(conn, itt);
1569         if (task) {
1570                 hdr->flags = ISCSI_FLAG_CMD_FINAL;
1571                 hdr->itt = task->hdr->itt;
1572                 hdr->ttt = cpu_to_be32(nop_in->ttt);
1573                 memcpy(hdr->lun, nop_in->lun, 8);
1574         }
1575 done:
1576         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1577         spin_unlock(&session->lock);
1578
1579         return tgt_async_nop;
1580 }
1581
1582
1583 /**
1584  * bnx2i_process_async_mesg - this function handles iscsi async message
1585  * @session:            iscsi session pointer
1586  * @bnx2i_conn:         iscsi connection pointer
1587  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1588  *
1589  * process iSCSI ASYNC Message
1590  */
1591 static void bnx2i_process_async_mesg(struct iscsi_session *session,
1592                                      struct bnx2i_conn *bnx2i_conn,
1593                                      struct cqe *cqe)
1594 {
1595         struct bnx2i_async_msg *async_cqe;
1596         struct iscsi_async *resp_hdr;
1597         u8 async_event;
1598
1599         bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1600
1601         async_cqe = (struct bnx2i_async_msg *)cqe;
1602         async_event = async_cqe->async_event;
1603
1604         if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1605                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1606                                   "async: scsi events not supported\n");
1607                 return;
1608         }
1609
1610         spin_lock(&session->lock);
1611         resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1612         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1613         resp_hdr->opcode = async_cqe->op_code;
1614         resp_hdr->flags = 0x80;
1615
1616         memcpy(resp_hdr->lun, async_cqe->lun, 8);
1617         resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1618         resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1619
1620         resp_hdr->async_event = async_cqe->async_event;
1621         resp_hdr->async_vcode = async_cqe->async_vcode;
1622
1623         resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1624         resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1625         resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1626
1627         __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1628                              (struct iscsi_hdr *)resp_hdr, NULL, 0);
1629         spin_unlock(&session->lock);
1630 }
1631
1632
1633 /**
1634  * bnx2i_process_reject_mesg - process iscsi reject pdu
1635  * @session:            iscsi session pointer
1636  * @bnx2i_conn:         iscsi connection pointer
1637  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1638  *
1639  * process iSCSI REJECT message
1640  */
1641 static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1642                                       struct bnx2i_conn *bnx2i_conn,
1643                                       struct cqe *cqe)
1644 {
1645         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1646         struct bnx2i_reject_msg *reject;
1647         struct iscsi_reject *hdr;
1648
1649         reject = (struct bnx2i_reject_msg *) cqe;
1650         if (reject->data_length) {
1651                 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1652                 bnx2i_put_rq_buf(bnx2i_conn, 1);
1653         } else
1654                 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1655
1656         spin_lock(&session->lock);
1657         hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1658         memset(hdr, 0, sizeof(struct iscsi_hdr));
1659         hdr->opcode = reject->op_code;
1660         hdr->reason = reject->reason;
1661         hton24(hdr->dlength, reject->data_length);
1662         hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1663         hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1664         hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1665         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1666                              reject->data_length);
1667         spin_unlock(&session->lock);
1668 }
1669
1670 /**
1671  * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1672  * @session:            iscsi session pointer
1673  * @bnx2i_conn:         iscsi connection pointer
1674  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1675  *
1676  * process command cleanup response CQE during conn shutdown or error recovery
1677  */
1678 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1679                                            struct bnx2i_conn *bnx2i_conn,
1680                                            struct cqe *cqe)
1681 {
1682         struct bnx2i_cleanup_response *cmd_clean_rsp;
1683         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1684         struct iscsi_task *task;
1685
1686         cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1687         spin_lock(&session->lock);
1688         task = iscsi_itt_to_task(conn,
1689                         cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1690         if (!task)
1691                 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1692                         cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1693         spin_unlock(&session->lock);
1694         complete(&bnx2i_conn->cmd_cleanup_cmpl);
1695 }
1696
1697
1698
1699 /**
1700  * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1701  * @bnx2i_conn:         iscsi connection
1702  *
1703  * this function is called by generic KCQ handler to process all pending CQE's
1704  */
1705 static void bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
1706 {
1707         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1708         struct iscsi_session *session = conn->session;
1709         struct qp_info *qp = &bnx2i_conn->ep->qp;
1710         struct bnx2i_nop_in_msg *nopin;
1711         int tgt_async_msg;
1712
1713         while (1) {
1714                 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1715                 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1716                         break;
1717
1718                 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx)))
1719                         break;
1720
1721                 tgt_async_msg = 0;
1722
1723                 switch (nopin->op_code) {
1724                 case ISCSI_OP_SCSI_CMD_RSP:
1725                 case ISCSI_OP_SCSI_DATA_IN:
1726                         bnx2i_process_scsi_cmd_resp(session, bnx2i_conn,
1727                                                     qp->cq_cons_qe);
1728                         break;
1729                 case ISCSI_OP_LOGIN_RSP:
1730                         bnx2i_process_login_resp(session, bnx2i_conn,
1731                                                  qp->cq_cons_qe);
1732                         break;
1733                 case ISCSI_OP_SCSI_TMFUNC_RSP:
1734                         bnx2i_process_tmf_resp(session, bnx2i_conn,
1735                                                qp->cq_cons_qe);
1736                         break;
1737                 case ISCSI_OP_LOGOUT_RSP:
1738                         bnx2i_process_logout_resp(session, bnx2i_conn,
1739                                                   qp->cq_cons_qe);
1740                         break;
1741                 case ISCSI_OP_NOOP_IN:
1742                         if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
1743                                                      qp->cq_cons_qe))
1744                                 tgt_async_msg = 1;
1745                         break;
1746                 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
1747                         bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
1748                                                        qp->cq_cons_qe);
1749                         break;
1750                 case ISCSI_OP_ASYNC_EVENT:
1751                         bnx2i_process_async_mesg(session, bnx2i_conn,
1752                                                  qp->cq_cons_qe);
1753                         tgt_async_msg = 1;
1754                         break;
1755                 case ISCSI_OP_REJECT:
1756                         bnx2i_process_reject_mesg(session, bnx2i_conn,
1757                                                   qp->cq_cons_qe);
1758                         break;
1759                 case ISCSI_OPCODE_CLEANUP_RESPONSE:
1760                         bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
1761                                                        qp->cq_cons_qe);
1762                         break;
1763                 default:
1764                         printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
1765                                           nopin->op_code);
1766                 }
1767
1768                 if (!tgt_async_msg)
1769                         bnx2i_conn->ep->num_active_cmds--;
1770
1771                 /* clear out in production version only, till beta keep opcode
1772                  * field intact, will be helpful in debugging (context dump)
1773                  * nopin->op_code = 0;
1774                  */
1775                 qp->cqe_exp_seq_sn++;
1776                 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
1777                         qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1778
1779                 if (qp->cq_cons_qe == qp->cq_last_qe) {
1780                         qp->cq_cons_qe = qp->cq_first_qe;
1781                         qp->cq_cons_idx = 0;
1782                 } else {
1783                         qp->cq_cons_qe++;
1784                         qp->cq_cons_idx++;
1785                 }
1786         }
1787         bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1788 }
1789
1790 /**
1791  * bnx2i_fastpath_notification - process global event queue (KCQ)
1792  * @hba:                adapter structure pointer
1793  * @new_cqe_kcqe:       pointer to newly DMA'ed KCQE entry
1794  *
1795  * Fast path event notification handler, KCQ entry carries context id
1796  *      of the connection that has 1 or more pending CQ entries
1797  */
1798 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
1799                                         struct iscsi_kcqe *new_cqe_kcqe)
1800 {
1801         struct bnx2i_conn *conn;
1802         u32 iscsi_cid;
1803
1804         iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
1805         conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1806
1807         if (!conn) {
1808                 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
1809                 return;
1810         }
1811         if (!conn->ep) {
1812                 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
1813                 return;
1814         }
1815
1816         bnx2i_process_new_cqes(conn);
1817 }
1818
1819
1820 /**
1821  * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
1822  * @hba:                adapter structure pointer
1823  * @update_kcqe:        kcqe pointer
1824  *
1825  * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
1826  */
1827 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
1828                                            struct iscsi_kcqe *update_kcqe)
1829 {
1830         struct bnx2i_conn *conn;
1831         u32 iscsi_cid;
1832
1833         iscsi_cid = update_kcqe->iscsi_conn_id;
1834         conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1835
1836         if (!conn) {
1837                 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
1838                 return;
1839         }
1840         if (!conn->ep) {
1841                 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
1842                 return;
1843         }
1844
1845         if (update_kcqe->completion_status) {
1846                 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
1847                 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
1848         } else
1849                 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
1850
1851         wake_up_interruptible(&conn->ep->ofld_wait);
1852 }
1853
1854
1855 /**
1856  * bnx2i_recovery_que_add_conn - add connection to recovery queue
1857  * @hba:                adapter structure pointer
1858  * @bnx2i_conn:         iscsi connection
1859  *
1860  * Add connection to recovery queue and schedule adapter eh worker
1861  */
1862 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
1863                                         struct bnx2i_conn *bnx2i_conn)
1864 {
1865         iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
1866                            ISCSI_ERR_CONN_FAILED);
1867 }
1868
1869
1870 /**
1871  * bnx2i_process_tcp_error - process error notification on a given connection
1872  *
1873  * @hba:                adapter structure pointer
1874  * @tcp_err:            tcp error kcqe pointer
1875  *
1876  * handles tcp level error notifications from FW.
1877  */
1878 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
1879                                     struct iscsi_kcqe *tcp_err)
1880 {
1881         struct bnx2i_conn *bnx2i_conn;
1882         u32 iscsi_cid;
1883
1884         iscsi_cid = tcp_err->iscsi_conn_id;
1885         bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1886
1887         if (!bnx2i_conn) {
1888                 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1889                 return;
1890         }
1891
1892         printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
1893                           iscsi_cid, tcp_err->completion_status);
1894         bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
1895 }
1896
1897
1898 /**
1899  * bnx2i_process_iscsi_error - process error notification on a given connection
1900  * @hba:                adapter structure pointer
1901  * @iscsi_err:          iscsi error kcqe pointer
1902  *
1903  * handles iscsi error notifications from the FW. Firmware based in initial
1904  *      handshake classifies iscsi protocol / TCP rfc violation into either
1905  *      warning or error indications. If indication is of "Error" type, driver
1906  *      will initiate session recovery for that connection/session. For
1907  *      "Warning" type indication, driver will put out a system log message
1908  *      (there will be only one message for each type for the life of the
1909  *      session, this is to avoid un-necessarily overloading the system)
1910  */
1911 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
1912                                       struct iscsi_kcqe *iscsi_err)
1913 {
1914         struct bnx2i_conn *bnx2i_conn;
1915         u32 iscsi_cid;
1916         char warn_notice[] = "iscsi_warning";
1917         char error_notice[] = "iscsi_error";
1918         char additional_notice[64];
1919         char *message;
1920         int need_recovery;
1921         u64 err_mask64;
1922
1923         iscsi_cid = iscsi_err->iscsi_conn_id;
1924         bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1925         if (!bnx2i_conn) {
1926                 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1927                 return;
1928         }
1929
1930         err_mask64 = (0x1ULL << iscsi_err->completion_status);
1931
1932         if (err_mask64 & iscsi_error_mask) {
1933                 need_recovery = 0;
1934                 message = warn_notice;
1935         } else {
1936                 need_recovery = 1;
1937                 message = error_notice;
1938         }
1939
1940         switch (iscsi_err->completion_status) {
1941         case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
1942                 strcpy(additional_notice, "hdr digest err");
1943                 break;
1944         case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
1945                 strcpy(additional_notice, "data digest err");
1946                 break;
1947         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
1948                 strcpy(additional_notice, "wrong opcode rcvd");
1949                 break;
1950         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
1951                 strcpy(additional_notice, "AHS len > 0 rcvd");
1952                 break;
1953         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
1954                 strcpy(additional_notice, "invalid ITT rcvd");
1955                 break;
1956         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
1957                 strcpy(additional_notice, "wrong StatSN rcvd");
1958                 break;
1959         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
1960                 strcpy(additional_notice, "wrong DataSN rcvd");
1961                 break;
1962         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
1963                 strcpy(additional_notice, "pend R2T violation");
1964                 break;
1965         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
1966                 strcpy(additional_notice, "ERL0, UO");
1967                 break;
1968         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
1969                 strcpy(additional_notice, "ERL0, U1");
1970                 break;
1971         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
1972                 strcpy(additional_notice, "ERL0, U2");
1973                 break;
1974         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
1975                 strcpy(additional_notice, "ERL0, U3");
1976                 break;
1977         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
1978                 strcpy(additional_notice, "ERL0, U4");
1979                 break;
1980         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
1981                 strcpy(additional_notice, "ERL0, U5");
1982                 break;
1983         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
1984                 strcpy(additional_notice, "ERL0, U6");
1985                 break;
1986         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
1987                 strcpy(additional_notice, "invalid resi len");
1988                 break;
1989         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
1990                 strcpy(additional_notice, "MRDSL violation");
1991                 break;
1992         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
1993                 strcpy(additional_notice, "F-bit not set");
1994                 break;
1995         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
1996                 strcpy(additional_notice, "invalid TTT");
1997                 break;
1998         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
1999                 strcpy(additional_notice, "invalid DataSN");
2000                 break;
2001         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2002                 strcpy(additional_notice, "burst len violation");
2003                 break;
2004         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2005                 strcpy(additional_notice, "buf offset violation");
2006                 break;
2007         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2008                 strcpy(additional_notice, "invalid LUN field");
2009                 break;
2010         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2011                 strcpy(additional_notice, "invalid R2TSN field");
2012                 break;
2013 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0       \
2014         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2015         case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2016                 strcpy(additional_notice, "invalid cmd len1");
2017                 break;
2018 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1       \
2019         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2020         case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2021                 strcpy(additional_notice, "invalid cmd len2");
2022                 break;
2023         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2024                 strcpy(additional_notice,
2025                        "pend r2t exceeds MaxOutstandingR2T value");
2026                 break;
2027         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2028                 strcpy(additional_notice, "TTT is rsvd");
2029                 break;
2030         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2031                 strcpy(additional_notice, "MBL violation");
2032                 break;
2033 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO         \
2034         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2035         case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2036                 strcpy(additional_notice, "data seg len != 0");
2037                 break;
2038         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2039                 strcpy(additional_notice, "reject pdu len error");
2040                 break;
2041         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2042                 strcpy(additional_notice, "async pdu len error");
2043                 break;
2044         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2045                 strcpy(additional_notice, "nopin pdu len error");
2046                 break;
2047 #define BNX2_ERR_PEND_R2T_IN_CLEANUP                    \
2048         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2049         case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2050                 strcpy(additional_notice, "pend r2t in cleanup");
2051                 break;
2052
2053         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2054                 strcpy(additional_notice, "IP fragments rcvd");
2055                 break;
2056         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2057                 strcpy(additional_notice, "IP options error");
2058                 break;
2059         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2060                 strcpy(additional_notice, "urgent flag error");
2061                 break;
2062         default:
2063                 printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2064                                   iscsi_err->completion_status);
2065         }
2066
2067         if (need_recovery) {
2068                 iscsi_conn_printk(KERN_ALERT,
2069                                   bnx2i_conn->cls_conn->dd_data,
2070                                   "bnx2i: %s - %s\n",
2071                                   message, additional_notice);
2072
2073                 iscsi_conn_printk(KERN_ALERT,
2074                                   bnx2i_conn->cls_conn->dd_data,
2075                                   "conn_err - hostno %d conn %p, "
2076                                   "iscsi_cid %x cid %x\n",
2077                                   bnx2i_conn->hba->shost->host_no,
2078                                   bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2079                                   bnx2i_conn->ep->ep_cid);
2080                 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2081         } else
2082                 if (!test_and_set_bit(iscsi_err->completion_status,
2083                                       (void *) &bnx2i_conn->violation_notified))
2084                         iscsi_conn_printk(KERN_ALERT,
2085                                           bnx2i_conn->cls_conn->dd_data,
2086                                           "bnx2i: %s - %s\n",
2087                                           message, additional_notice);
2088 }
2089
2090
2091 /**
2092  * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2093  * @hba:                adapter structure pointer
2094  * @conn_destroy:       conn destroy kcqe pointer
2095  *
2096  * handles connection destroy completion request.
2097  */
2098 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2099                                             struct iscsi_kcqe *conn_destroy)
2100 {
2101         struct bnx2i_endpoint *ep;
2102
2103         ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2104         if (!ep) {
2105                 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2106                                   "offload request, unexpected complection\n");
2107                 return;
2108         }
2109
2110         if (hba != ep->hba) {
2111                 printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2112                 return;
2113         }
2114
2115         if (conn_destroy->completion_status) {
2116                 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2117                 ep->state = EP_STATE_CLEANUP_FAILED;
2118         } else
2119                 ep->state = EP_STATE_CLEANUP_CMPL;
2120         wake_up_interruptible(&ep->ofld_wait);
2121 }
2122
2123
2124 /**
2125  * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2126  * @hba:                adapter structure pointer
2127  * @ofld_kcqe:          conn offload kcqe pointer
2128  *
2129  * handles initial connection offload completion, ep_connect() thread is
2130  *      woken-up to continue with LLP connect process
2131  */
2132 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2133                                     struct iscsi_kcqe *ofld_kcqe)
2134 {
2135         u32 cid_addr;
2136         struct bnx2i_endpoint *ep;
2137         u32 cid_num;
2138
2139         ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2140         if (!ep) {
2141                 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2142                 return;
2143         }
2144
2145         if (hba != ep->hba) {
2146                 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2147                 return;
2148         }
2149
2150         if (ofld_kcqe->completion_status) {
2151                 if (ofld_kcqe->completion_status ==
2152                     ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2153                         printk(KERN_ALERT "bnx2i: unable to allocate"
2154                                           " iSCSI context resources\n");
2155                 ep->state = EP_STATE_OFLD_FAILED;
2156         } else {
2157                 ep->state = EP_STATE_OFLD_COMPL;
2158                 cid_addr = ofld_kcqe->iscsi_conn_context_id;
2159                 cid_num = bnx2i_get_cid_num(ep);
2160                 ep->ep_cid = cid_addr;
2161                 ep->qp.ctx_base = NULL;
2162         }
2163         wake_up_interruptible(&ep->ofld_wait);
2164 }
2165
2166 /**
2167  * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2168  * @hba:                adapter structure pointer
2169  * @update_kcqe:        kcqe pointer
2170  *
2171  * Generic KCQ event handler/dispatcher
2172  */
2173 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2174                                 u32 num_cqe)
2175 {
2176         struct bnx2i_hba *hba = context;
2177         int i = 0;
2178         struct iscsi_kcqe *ikcqe = NULL;
2179
2180         while (i < num_cqe) {
2181                 ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2182
2183                 if (ikcqe->op_code ==
2184                     ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2185                         bnx2i_fastpath_notification(hba, ikcqe);
2186                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2187                         bnx2i_process_ofld_cmpl(hba, ikcqe);
2188                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2189                         bnx2i_process_update_conn_cmpl(hba, ikcqe);
2190                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2191                         if (ikcqe->completion_status !=
2192                             ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2193                                 bnx2i_iscsi_license_error(hba, ikcqe->\
2194                                                           completion_status);
2195                         else {
2196                                 set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2197                                 bnx2i_get_link_state(hba);
2198                                 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2199                                                  "ISCSI_INIT passed\n",
2200                                                  (u8)hba->pcidev->bus->number,
2201                                                  hba->pci_devno,
2202                                                  (u8)hba->pci_func);
2203
2204
2205                         }
2206                 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2207                         bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2208                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2209                         bnx2i_process_iscsi_error(hba, ikcqe);
2210                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2211                         bnx2i_process_tcp_error(hba, ikcqe);
2212                 else
2213                         printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2214                                           ikcqe->op_code);
2215         }
2216 }
2217
2218
2219 /**
2220  * bnx2i_indicate_netevent - Generic netdev event handler
2221  * @context:    adapter structure pointer
2222  * @event:      event type
2223  *
2224  * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2225  *      NETDEV_GOING_DOWN and NETDEV_CHANGE
2226  */
2227 static void bnx2i_indicate_netevent(void *context, unsigned long event)
2228 {
2229         struct bnx2i_hba *hba = context;
2230
2231         switch (event) {
2232         case NETDEV_UP:
2233                 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2234                         bnx2i_send_fw_iscsi_init_msg(hba);
2235                 break;
2236         case NETDEV_DOWN:
2237                 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2238                 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2239                 break;
2240         case NETDEV_GOING_DOWN:
2241                 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2242                 iscsi_host_for_each_session(hba->shost,
2243                                             bnx2i_drop_session);
2244                 break;
2245         case NETDEV_CHANGE:
2246                 bnx2i_get_link_state(hba);
2247                 break;
2248         default:
2249                 ;
2250         }
2251 }
2252
2253
2254 /**
2255  * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2256  * @cm_sk:              cnic sock structure pointer
2257  *
2258  * function callback exported via bnx2i - cnic driver interface to
2259  *      indicate completion of option-2 TCP connect request.
2260  */
2261 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2262 {
2263         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2264
2265         if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2266                 ep->state = EP_STATE_CONNECT_FAILED;
2267         else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2268                 ep->state = EP_STATE_CONNECT_COMPL;
2269         else
2270                 ep->state = EP_STATE_CONNECT_FAILED;
2271
2272         wake_up_interruptible(&ep->ofld_wait);
2273 }
2274
2275
2276 /**
2277  * bnx2i_cm_close_cmpl - process tcp conn close completion
2278  * @cm_sk:      cnic sock structure pointer
2279  *
2280  * function callback exported via bnx2i - cnic driver interface to
2281  *      indicate completion of option-2 graceful TCP connect shutdown
2282  */
2283 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2284 {
2285         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2286
2287         ep->state = EP_STATE_DISCONN_COMPL;
2288         wake_up_interruptible(&ep->ofld_wait);
2289 }
2290
2291
2292 /**
2293  * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2294  * @cm_sk:      cnic sock structure pointer
2295  *
2296  * function callback exported via bnx2i - cnic driver interface to
2297  *      indicate completion of option-2 abortive TCP connect termination
2298  */
2299 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2300 {
2301         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2302
2303         ep->state = EP_STATE_DISCONN_COMPL;
2304         wake_up_interruptible(&ep->ofld_wait);
2305 }
2306
2307
2308 /**
2309  * bnx2i_cm_remote_close - process received TCP FIN
2310  * @hba:                adapter structure pointer
2311  * @update_kcqe:        kcqe pointer
2312  *
2313  * function callback exported via bnx2i - cnic driver interface to indicate
2314  *      async TCP events such as FIN
2315  */
2316 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2317 {
2318         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2319
2320         ep->state = EP_STATE_TCP_FIN_RCVD;
2321         if (ep->conn)
2322                 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2323 }
2324
2325 /**
2326  * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2327  * @hba:                adapter structure pointer
2328  * @update_kcqe:        kcqe pointer
2329  *
2330  * function callback exported via bnx2i - cnic driver interface to
2331  *      indicate async TCP events (RST) sent by the peer.
2332  */
2333 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2334 {
2335         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2336
2337         ep->state = EP_STATE_TCP_RST_RCVD;
2338         if (ep->conn)
2339                 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2340 }
2341
2342
2343 static void bnx2i_send_nl_mesg(struct cnic_dev *dev, u32 msg_type,
2344                                char *buf, u16 buflen)
2345 {
2346         struct bnx2i_hba *hba;
2347
2348         hba = bnx2i_find_hba_for_cnic(dev);
2349         if (!hba)
2350                 return;
2351
2352         if (iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2353                                    msg_type, buf, buflen))
2354                 printk(KERN_ALERT "bnx2i: private nl message send error\n");
2355
2356 }
2357
2358
2359 /**
2360  * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2361  *                      carrying callback function pointers
2362  *
2363  */
2364 struct cnic_ulp_ops bnx2i_cnic_cb = {
2365         .cnic_init = bnx2i_ulp_init,
2366         .cnic_exit = bnx2i_ulp_exit,
2367         .cnic_start = bnx2i_start,
2368         .cnic_stop = bnx2i_stop,
2369         .indicate_kcqes = bnx2i_indicate_kcqe,
2370         .indicate_netevent = bnx2i_indicate_netevent,
2371         .cm_connect_complete = bnx2i_cm_connect_cmpl,
2372         .cm_close_complete = bnx2i_cm_close_cmpl,
2373         .cm_abort_complete = bnx2i_cm_abort_cmpl,
2374         .cm_remote_close = bnx2i_cm_remote_close,
2375         .cm_remote_abort = bnx2i_cm_remote_abort,
2376         .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2377         .owner = THIS_MODULE
2378 };
2379
2380
2381 /**
2382  * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2383  * @ep: bnx2i endpoint
2384  *
2385  * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2386  *      register in BAR #0. Whereas in 57710 these register are accessed by
2387  *      mapping BAR #1
2388  */
2389 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2390 {
2391         u32 cid_num;
2392         u32 reg_off;
2393         u32 first_l4l5;
2394         u32 ctx_sz;
2395         u32 config2;
2396         resource_size_t reg_base;
2397
2398         cid_num = bnx2i_get_cid_num(ep);
2399
2400         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2401                 reg_base = pci_resource_start(ep->hba->pcidev,
2402                                               BNX2X_DOORBELL_PCI_BAR);
2403                 reg_off = PAGE_SIZE * (cid_num & 0x1FFFF) + DPM_TRIGER_TYPE;
2404                 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
2405                 goto arm_cq;
2406         }
2407
2408         reg_base = ep->hba->netdev->base_addr;
2409         if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2410             (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2411                 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2412                 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2413                 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2414                 if (ctx_sz)
2415                         reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2416                                   + BNX2I_570X_PAGE_SIZE_DEFAULT *
2417                                   (((cid_num - first_l4l5) / ctx_sz) + 256);
2418                 else
2419                         reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2420         } else
2421                 /* 5709 device in normal node and 5706/5708 devices */
2422                 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2423
2424         ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off,
2425                                           MB_KERNEL_CTX_SIZE);
2426         if (!ep->qp.ctx_base)
2427                 return -ENOMEM;
2428
2429 arm_cq:
2430         bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2431         return 0;
2432 }