drivers/scsi/bnx2i/bnx2i_hwi.c

   1 /* bnx2i_hwi.c: Broadcom NetXtreme II iSCSI driver.
   2  *
   3  * Copyright (c) 2006 - 2009 Broadcom Corporation
   4  * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
   5  * Copyright (c) 2007, 2008 Mike Christie
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation.
  10  *
  11  * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
  12  */
  13
  14 #include <linux/gfp.h>
  15 #include <scsi/scsi_tcq.h>
  16 #include <scsi/libiscsi.h>
  17 #include "bnx2i.h"
  18
  19 /**
  20  * bnx2i_get_cid_num - get cid from ep
  21  * @ep:         endpoint pointer
  22  *
  23  * Only applicable to 57710 family of devices
  24  */
  25 static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
  26 {
  27         u32 cid;
  28
  29         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
  30                 cid = ep->ep_cid;
  31         else
  32                 cid = GET_CID_NUM(ep->ep_cid);
  33         return cid;
  34 }
  35
  36
  37 /**
  38  * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
  39  * @hba:                Adapter for which adjustments is to be made
  40  *
  41  * Only applicable to 57710 family of devices
  42  */
  43 static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
  44 {
  45         u32 num_elements_per_pg;
  46
  47         if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
  48             test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
  49             test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
  50                 if (!is_power_of_2(hba->max_sqes))
  51                         hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);
  52
  53                 if (!is_power_of_2(hba->max_rqes))
  54                         hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
  55         }
  56
  57         /* Adjust each queue size if the user selection does not
  58          * yield integral num of page buffers
  59          */
  60         /* adjust SQ */
  61         num_elements_per_pg = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
  62         if (hba->max_sqes < num_elements_per_pg)
  63                 hba->max_sqes = num_elements_per_pg;
  64         else if (hba->max_sqes % num_elements_per_pg)
  65                 hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
  66                                  ~(num_elements_per_pg - 1);
  67
  68         /* adjust CQ */
  69         num_elements_per_pg = PAGE_SIZE / BNX2I_CQE_SIZE;
  70         if (hba->max_cqes < num_elements_per_pg)
  71                 hba->max_cqes = num_elements_per_pg;
  72         else if (hba->max_cqes % num_elements_per_pg)
  73                 hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
  74                                  ~(num_elements_per_pg - 1);
  75
  76         /* adjust RQ */
  77         num_elements_per_pg = PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
  78         if (hba->max_rqes < num_elements_per_pg)
  79                 hba->max_rqes = num_elements_per_pg;
  80         else if (hba->max_rqes % num_elements_per_pg)
  81                 hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
  82                                  ~(num_elements_per_pg - 1);
  83 }
  84
  85
  86 /**
  87  * bnx2i_get_link_state - get network interface link state
  88  * @hba:        adapter instance pointer
  89  *
  90  * updates adapter structure flag based on netdev state
  91  */
  92 static void bnx2i_get_link_state(struct bnx2i_hba *hba)
  93 {
  94         if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
  95                 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
  96         else
  97                 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
  98 }
  99
 100
 101 /**
 102  * bnx2i_iscsi_license_error - displays iscsi license related error message
 103  * @hba:                adapter instance pointer
 104  * @error_code:         error classification
 105  *
 106  * Puts out an error log when driver is unable to offload iscsi connection
 107  *      due to license restrictions
 108  */
 109 static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
 110 {
 111         if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
 112                 /* iSCSI offload not supported on this device */
 113                 printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
 114                                 hba->netdev->name);
 115         if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
 116                 /* iSCSI offload not supported on this LOM device */
 117                 printk(KERN_ERR "bnx2i: LOM is not enable to "
 118                                 "offload iSCSI connections, dev=%s\n",
 119                                 hba->netdev->name);
 120         set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
 121 }
 122
 123
 124 /**
 125  * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
 126  * @ep:         endpoint (transport indentifier) structure
 127  * @action:     action, ARM or DISARM. For now only ARM_CQE is used
 128  *
 129  * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
 130  *      the driver. EQ event is generated CQ index is hit or at least 1 CQ is
 131  *      outstanding and on chip timer expires
 132  */
 133 void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
 134 {
 135         struct bnx2i_5771x_cq_db *cq_db;
 136         u16 cq_index;
 137         u16 next_index;
 138         u32 num_active_cmds;
 139
 140
 141         /* Coalesce CQ entries only on 10G devices */
 142         if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 143                 return;
 144
 145         /* Do not update CQ DB multiple times before firmware writes
 146          * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
 147          * interrupts and other unwanted results
 148          */
 149         cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
 150         if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
 151                 return;
 152
 153         if (action == CNIC_ARM_CQE) {
 154                 num_active_cmds = ep->num_active_cmds;
 155                 if (num_active_cmds <= event_coal_min)
 156                         next_index = 1;
 157                 else
 158                         next_index = event_coal_min +
 159                                 (num_active_cmds - event_coal_min) / event_coal_div;
 160                 if (!next_index)
 161                         next_index = 1;
 162                 cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;
 163                 if (cq_index > ep->qp.cqe_size * 2)
 164                         cq_index -= ep->qp.cqe_size * 2;
 165                 if (!cq_index)
 166                         cq_index = 1;
 167
 168                 cq_db->sqn[0] = cq_index;
 169         }
 170 }
 171
 172
 173 /**
 174  * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
 175  * @conn:               iscsi connection on which RQ event occured
 176  * @ptr:                driver buffer to which RQ buffer contents is to
 177  *                      be copied
 178  * @len:                length of valid data inside RQ buf
 179  *
 180  * Copies RQ buffer contents from shared (DMA'able) memory region to
 181  *      driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
 182  *      scsi sense info
 183  */
 184 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
 185 {
 186         if (!bnx2i_conn->ep->qp.rqe_left)
 187                 return;
 188
 189         bnx2i_conn->ep->qp.rqe_left--;
 190         memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
 191         if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
 192                 bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
 193                 bnx2i_conn->ep->qp.rq_cons_idx = 0;
 194         } else {
 195                 bnx2i_conn->ep->qp.rq_cons_qe++;
 196                 bnx2i_conn->ep->qp.rq_cons_idx++;
 197         }
 198 }
 199
 200
 201 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
 202 {
 203         struct bnx2i_5771x_dbell dbell;
 204         u32 msg;
 205
 206         memset(&dbell, 0, sizeof(dbell));
 207         dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
 208                               B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
 209         msg = *((u32 *)&dbell);
 210         /* TODO : get doorbell register mapping */
 211         writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
 212 }
 213
 214
 215 /**
 216  * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
 217  * @conn:       iscsi connection on which event to post
 218  * @count:      number of RQ buffer being posted to chip
 219  *
 220  * No need to ring hardware doorbell for 57710 family of devices
 221  */
 222 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
 223 {
 224         struct bnx2i_5771x_sq_rq_db *rq_db;
 225         u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
 226         struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 227
 228         ep->qp.rqe_left += count;
 229         ep->qp.rq_prod_idx &= 0x7FFF;
 230         ep->qp.rq_prod_idx += count;
 231
 232         if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
 233                 ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
 234                 if (!hi_bit)
 235                         ep->qp.rq_prod_idx |= 0x8000;
 236         } else
 237                 ep->qp.rq_prod_idx |= hi_bit;
 238
 239         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 240                 rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
 241                 rq_db->prod_idx = ep->qp.rq_prod_idx;
 242                 /* no need to ring hardware doorbell for 57710 */
 243         } else {
 244                 writew(ep->qp.rq_prod_idx,
 245                        ep->qp.ctx_base + CNIC_RECV_DOORBELL);
 246         }
 247         mmiowb();
 248 }
 249
 250
 251 /**
 252  * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
 253  * @conn:               iscsi connection to which new SQ entries belong
 254  * @count:              number of SQ WQEs to post
 255  *
 256  * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
 257  *      of devices. For 5706/5708/5709 new SQ WQE count is written into the
 258  *      doorbell register
 259  */
 260 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
 261 {
 262         struct bnx2i_5771x_sq_rq_db *sq_db;
 263         struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 264
 265         ep->num_active_cmds++;
 266         wmb();  /* flush SQ WQE memory before the doorbell is rung */
 267         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 268                 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
 269                 sq_db->prod_idx = ep->qp.sq_prod_idx;
 270                 bnx2i_ring_577xx_doorbell(bnx2i_conn);
 271         } else
 272                 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
 273
 274         mmiowb(); /* flush posted PCI writes */
 275 }
 276
 277
 278 /**
 279  * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
 280  * @conn:       iscsi connection to which new SQ entries belong
 281  * @count:      number of SQ WQEs to post
 282  *
 283  * this routine will update SQ driver parameters and ring the doorbell
 284  */
 285 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
 286                                               int count)
 287 {
 288         int tmp_cnt;
 289
 290         if (count == 1) {
 291                 if (bnx2i_conn->ep->qp.sq_prod_qe ==
 292                     bnx2i_conn->ep->qp.sq_last_qe)
 293                         bnx2i_conn->ep->qp.sq_prod_qe =
 294                                                 bnx2i_conn->ep->qp.sq_first_qe;
 295                 else
 296                         bnx2i_conn->ep->qp.sq_prod_qe++;
 297         } else {
 298                 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
 299                     bnx2i_conn->ep->qp.sq_last_qe)
 300                         bnx2i_conn->ep->qp.sq_prod_qe += count;
 301                 else {
 302                         tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
 303                                 bnx2i_conn->ep->qp.sq_prod_qe;
 304                         bnx2i_conn->ep->qp.sq_prod_qe =
 305                                 &bnx2i_conn->ep->qp.sq_first_qe[count -
 306                                                                 (tmp_cnt + 1)];
 307                 }
 308         }
 309         bnx2i_conn->ep->qp.sq_prod_idx += count;
 310         /* Ring the doorbell */
 311         bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
 312 }
 313
 314
 315 /**
 316  * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
 317  * @conn:       iscsi connection
 318  * @cmd:        driver command structure which is requesting
 319  *              a WQE to sent to chip for further processing
 320  *
 321  * prepare and post an iSCSI Login request WQE to CNIC firmware
 322  */
 323 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
 324                            struct iscsi_task *task)
 325 {
 326         struct bnx2i_cmd *bnx2i_cmd;
 327         struct bnx2i_login_request *login_wqe;
 328         struct iscsi_login *login_hdr;
 329         u32 dword;
 330
 331         bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 332         login_hdr = (struct iscsi_login *)task->hdr;
 333         login_wqe = (struct bnx2i_login_request *)
 334                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 335
 336         login_wqe->op_code = login_hdr->opcode;
 337         login_wqe->op_attr = login_hdr->flags;
 338         login_wqe->version_max = login_hdr->max_version;
 339         login_wqe->version_min = login_hdr->min_version;
 340         login_wqe->data_length = ntoh24(login_hdr->dlength);
 341         login_wqe->isid_lo = *((u32 *) login_hdr->isid);
 342         login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
 343         login_wqe->tsih = login_hdr->tsih;
 344         login_wqe->itt = task->itt |
 345                 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
 346         login_wqe->cid = login_hdr->cid;
 347
 348         login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
 349         login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
 350         login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;
 351
 352         login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
 353         login_wqe->resp_bd_list_addr_hi =
 354                 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
 355
 356         dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
 357                  (bnx2i_conn->gen_pdu.resp_buf_size <<
 358                   ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
 359         login_wqe->resp_buffer = dword;
 360         login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
 361         login_wqe->bd_list_addr_hi =
 362                 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
 363         login_wqe->num_bds = 1;
 364         login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 365
 366         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 367         return 0;
 368 }
 369
 370 /**
 371  * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
 372  * @conn:       iscsi connection
 373  * @mtask:      driver command structure which is requesting
 374  *              a WQE to sent to chip for further processing
 375  *
 376  * prepare and post an iSCSI Login request WQE to CNIC firmware
 377  */
 378 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
 379                          struct iscsi_task *mtask)
 380 {
 381         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
 382         struct iscsi_tm *tmfabort_hdr;
 383         struct scsi_cmnd *ref_sc;
 384         struct iscsi_task *ctask;
 385         struct bnx2i_cmd *bnx2i_cmd;
 386         struct bnx2i_tmf_request *tmfabort_wqe;
 387         u32 dword;
 388         u32 scsi_lun[2];
 389
 390         bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
 391         tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
 392         tmfabort_wqe = (struct bnx2i_tmf_request *)
 393                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 394
 395         tmfabort_wqe->op_code = tmfabort_hdr->opcode;
 396         tmfabort_wqe->op_attr = 0;
 397         tmfabort_wqe->op_attr =
 398                 ISCSI_TMF_REQUEST_ALWAYS_ONE | ISCSI_TM_FUNC_ABORT_TASK;
 399
 400         tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
 401         tmfabort_wqe->reserved2 = 0;
 402         tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
 403
 404         ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
 405         if (!ctask || !ctask->sc)
 406                 /*
 407                  * the iscsi layer must have completed the cmd while this
 408                  * was starting up.
 409                  *
 410                  * Note: In the case of a SCSI cmd timeout, the task's sc
 411                  *       is still active; hence ctask->sc != 0
 412                  *       In this case, the task must be aborted
 413                  */
 414                 return 0;
 415
 416         ref_sc = ctask->sc;
 417
 418         /* Retrieve LUN directly from the ref_sc */
 419         int_to_scsilun(ref_sc->device->lun, (struct scsi_lun *) scsi_lun);
 420         tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
 421         tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
 422
 423         if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
 424                 dword = (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
 425         else
 426                 dword = (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
 427         tmfabort_wqe->ref_itt = (dword | (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
 428         tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
 429
 430         tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
 431         tmfabort_wqe->bd_list_addr_hi = (u32)
 432                                 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 433         tmfabort_wqe->num_bds = 1;
 434         tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 435
 436         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 437         return 0;
 438 }
 439
 440 /**
 441  * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
 442  * @conn:       iscsi connection
 443  * @cmd:        driver command structure which is requesting
 444  *              a WQE to sent to chip for further processing
 445  *
 446  * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
 447  */
 448 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
 449                              struct bnx2i_cmd *cmd)
 450 {
 451         struct bnx2i_cmd_request *scsi_cmd_wqe;
 452
 453         scsi_cmd_wqe = (struct bnx2i_cmd_request *)
 454                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 455         memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
 456         scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 457
 458         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 459         return 0;
 460 }
 461
 462 /**
 463  * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
 464  * @conn:               iscsi connection
 465  * @cmd:                driver command structure which is requesting
 466  *                      a WQE to sent to chip for further processing
 467  * @ttt:                TTT to be used when building pdu header
 468  * @datap:              payload buffer pointer
 469  * @data_len:           payload data length
 470  * @unsol:              indicated whether nopout pdu is unsolicited pdu or
 471  *                      in response to target's NOPIN w/ TTT != FFFFFFFF
 472  *
 473  * prepare and post a nopout request WQE to CNIC firmware
 474  */
 475 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
 476                             struct iscsi_task *task, u32 ttt,
 477                             char *datap, int data_len, int unsol)
 478 {
 479         struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 480         struct bnx2i_cmd *bnx2i_cmd;
 481         struct bnx2i_nop_out_request *nopout_wqe;
 482         struct iscsi_nopout *nopout_hdr;
 483
 484         bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 485         nopout_hdr = (struct iscsi_nopout *)task->hdr;
 486         nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
 487         nopout_wqe->op_code = nopout_hdr->opcode;
 488         nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
 489         memcpy(nopout_wqe->lun, nopout_hdr->lun, 8);
 490
 491         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 492                 u32 tmp = nopout_hdr->lun[0];
 493                 /* 57710 requires LUN field to be swapped */
 494                 nopout_hdr->lun[0] = nopout_hdr->lun[1];
 495                 nopout_hdr->lun[1] = tmp;
 496         }
 497
 498         nopout_wqe->itt = ((u16)task->itt |
 499                            (ISCSI_TASK_TYPE_MPATH <<
 500                             ISCSI_TMF_REQUEST_TYPE_SHIFT));
 501         nopout_wqe->ttt = ttt;
 502         nopout_wqe->flags = 0;
 503         if (!unsol)
 504                 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
 505         else if (nopout_hdr->itt == RESERVED_ITT)
 506                 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
 507
 508         nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
 509         nopout_wqe->data_length = data_len;
 510         if (data_len) {
 511                 /* handle payload data, not required in first release */
 512                 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
 513         } else {
 514                 nopout_wqe->bd_list_addr_lo = (u32)
 515                                         bnx2i_conn->hba->mp_bd_dma;
 516                 nopout_wqe->bd_list_addr_hi =
 517                         (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 518                 nopout_wqe->num_bds = 1;
 519         }
 520         nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 521
 522         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 523         return 0;
 524 }
 525
 526
 527 /**
 528  * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
 529  * @conn:       iscsi connection
 530  * @cmd:        driver command structure which is requesting
 531  *              a WQE to sent to chip for further processing
 532  *
 533  * prepare and post logout request WQE to CNIC firmware
 534  */
 535 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
 536                             struct iscsi_task *task)
 537 {
 538         struct bnx2i_cmd *bnx2i_cmd;
 539         struct bnx2i_logout_request *logout_wqe;
 540         struct iscsi_logout *logout_hdr;
 541
 542         bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 543         logout_hdr = (struct iscsi_logout *)task->hdr;
 544
 545         logout_wqe = (struct bnx2i_logout_request *)
 546                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 547         memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
 548
 549         logout_wqe->op_code = logout_hdr->opcode;
 550         logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
 551         logout_wqe->op_attr =
 552                         logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
 553         logout_wqe->itt = ((u16)task->itt |
 554                            (ISCSI_TASK_TYPE_MPATH <<
 555                             ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
 556         logout_wqe->data_length = 0;
 557         logout_wqe->cid = 0;
 558
 559         logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
 560         logout_wqe->bd_list_addr_hi = (u32)
 561                                 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 562         logout_wqe->num_bds = 1;
 563         logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 564
 565         bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;
 566
 567         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 568         return 0;
 569 }
 570
 571
 572 /**
 573  * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
 574  * @conn:       iscsi connection which requires iscsi parameter update
 575  *
 576  * sends down iSCSI Conn Update request to move iSCSI conn to FFP
 577  */
 578 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
 579 {
 580         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
 581         struct bnx2i_hba *hba = bnx2i_conn->hba;
 582         struct kwqe *kwqe_arr[2];
 583         struct iscsi_kwqe_conn_update *update_wqe;
 584         struct iscsi_kwqe_conn_update conn_update_kwqe;
 585
 586         update_wqe = &conn_update_kwqe;
 587
 588         update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
 589         update_wqe->hdr.flags =
 590                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 591
 592         /* 5771x requires conn context id to be passed as is */
 593         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
 594                 update_wqe->context_id = bnx2i_conn->ep->ep_cid;
 595         else
 596                 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
 597         update_wqe->conn_flags = 0;
 598         if (conn->hdrdgst_en)
 599                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
 600         if (conn->datadgst_en)
 601                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
 602         if (conn->session->initial_r2t_en)
 603                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
 604         if (conn->session->imm_data_en)
 605                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
 606
 607         update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
 608         update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
 609         update_wqe->first_burst_length = conn->session->first_burst;
 610         update_wqe->max_burst_length = conn->session->max_burst;
 611         update_wqe->exp_stat_sn = conn->exp_statsn;
 612         update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
 613         update_wqe->session_error_recovery_level = conn->session->erl;
 614         iscsi_conn_printk(KERN_ALERT, conn,
 615                           "bnx2i: conn update - MBL 0x%x FBL 0x%x"
 616                           "MRDSL_I 0x%x MRDSL_T 0x%x \n",
 617                           update_wqe->max_burst_length,
 618                           update_wqe->first_burst_length,
 619                           update_wqe->max_recv_pdu_length,
 620                           update_wqe->max_send_pdu_length);
 621
 622         kwqe_arr[0] = (struct kwqe *) update_wqe;
 623         if (hba->cnic && hba->cnic->submit_kwqes)
 624                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
 625 }
 626
 627
 628 /**
 629  * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
 630  * @data:       endpoint (transport handle) structure pointer
 631  *
 632  * routine to handle connection offload/destroy request timeout
 633  */
 634 void bnx2i_ep_ofld_timer(unsigned long data)
 635 {
 636         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;
 637
 638         if (ep->state == EP_STATE_OFLD_START) {
 639                 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
 640                 ep->state = EP_STATE_OFLD_FAILED;
 641         } else if (ep->state == EP_STATE_DISCONN_START) {
 642                 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
 643                 ep->state = EP_STATE_DISCONN_TIMEDOUT;
 644         } else if (ep->state == EP_STATE_CLEANUP_START) {
 645                 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
 646                 ep->state = EP_STATE_CLEANUP_FAILED;
 647         }
 648
 649         wake_up_interruptible(&ep->ofld_wait);
 650 }
 651
 652
 653 static int bnx2i_power_of2(u32 val)
 654 {
 655         u32 power = 0;
 656         if (val & (val - 1))
 657                 return power;
 658         val--;
 659         while (val) {
 660                 val = val >> 1;
 661                 power++;
 662         }
 663         return power;
 664 }
 665
 666
 667 /**
 668  * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
 669  * @hba:        adapter structure pointer
 670  * @cmd:        driver command structure which is requesting
 671  *              a WQE to sent to chip for further processing
 672  *
 673  * prepares and posts CONN_OFLD_REQ1/2 KWQE
 674  */
 675 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
 676 {
 677         struct bnx2i_cleanup_request *cmd_cleanup;
 678
 679         cmd_cleanup =
 680                 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
 681         memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
 682
 683         cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
 684         cmd_cleanup->itt = cmd->req.itt;
 685         cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
 686
 687         bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
 688 }
 689
 690
 691 /**
 692  * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
 693  * @hba:        adapter structure pointer
 694  * @ep:         endpoint (transport indentifier) structure
 695  *
 696  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
 697  *      iscsi connection context clean-up process
 698  */
 699 void bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 700 {
 701         struct kwqe *kwqe_arr[2];
 702         struct iscsi_kwqe_conn_destroy conn_cleanup;
 703
 704         memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
 705
 706         conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
 707         conn_cleanup.hdr.flags =
 708                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 709         /* 5771x requires conn context id to be passed as is */
 710         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 711                 conn_cleanup.context_id = ep->ep_cid;
 712         else
 713                 conn_cleanup.context_id = (ep->ep_cid >> 7);
 714
 715         conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
 716
 717         kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
 718         if (hba->cnic && hba->cnic->submit_kwqes)
 719                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
 720 }
 721
 722
 723 /**
 724  * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
 725  * @hba:                adapter structure pointer
 726  * @ep:                 endpoint (transport indentifier) structure
 727  *
 728  * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 729  */
 730 static void bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
 731                                           struct bnx2i_endpoint *ep)
 732 {
 733         struct kwqe *kwqe_arr[2];
 734         struct iscsi_kwqe_conn_offload1 ofld_req1;
 735         struct iscsi_kwqe_conn_offload2 ofld_req2;
 736         dma_addr_t dma_addr;
 737         int num_kwqes = 2;
 738         u32 *ptbl;
 739
 740         ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
 741         ofld_req1.hdr.flags =
 742                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 743
 744         ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
 745
 746         dma_addr = ep->qp.sq_pgtbl_phys;
 747         ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
 748         ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 749
 750         dma_addr = ep->qp.cq_pgtbl_phys;
 751         ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
 752         ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 753
 754         ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
 755         ofld_req2.hdr.flags =
 756                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 757
 758         dma_addr = ep->qp.rq_pgtbl_phys;
 759         ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
 760         ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 761
 762         ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
 763
 764         ofld_req2.sq_first_pte.hi = *ptbl++;
 765         ofld_req2.sq_first_pte.lo = *ptbl;
 766
 767         ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
 768         ofld_req2.cq_first_pte.hi = *ptbl++;
 769         ofld_req2.cq_first_pte.lo = *ptbl;
 770
 771         kwqe_arr[0] = (struct kwqe *) &ofld_req1;
 772         kwqe_arr[1] = (struct kwqe *) &ofld_req2;
 773         ofld_req2.num_additional_wqes = 0;
 774
 775         if (hba->cnic && hba->cnic->submit_kwqes)
 776                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
 777 }
 778
 779
 780 /**
 781  * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
 782  * @hba:                adapter structure pointer
 783  * @ep:                 endpoint (transport indentifier) structure
 784  *
 785  * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 786  */
 787 static void bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
 788                                            struct bnx2i_endpoint *ep)
 789 {
 790         struct kwqe *kwqe_arr[5];
 791         struct iscsi_kwqe_conn_offload1 ofld_req1;
 792         struct iscsi_kwqe_conn_offload2 ofld_req2;
 793         struct iscsi_kwqe_conn_offload3 ofld_req3[1];
 794         dma_addr_t dma_addr;
 795         int num_kwqes = 2;
 796         u32 *ptbl;
 797
 798         ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
 799         ofld_req1.hdr.flags =
 800                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 801
 802         ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
 803
 804         dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
 805         ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
 806         ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 807
 808         dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
 809         ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
 810         ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 811
 812         ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
 813         ofld_req2.hdr.flags =
 814                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 815
 816         dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
 817         ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
 818         ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 819
 820         ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
 821         ofld_req2.sq_first_pte.hi = *ptbl++;
 822         ofld_req2.sq_first_pte.lo = *ptbl;
 823
 824         ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
 825         ofld_req2.cq_first_pte.hi = *ptbl++;
 826         ofld_req2.cq_first_pte.lo = *ptbl;
 827
 828         kwqe_arr[0] = (struct kwqe *) &ofld_req1;
 829         kwqe_arr[1] = (struct kwqe *) &ofld_req2;
 830
 831         ofld_req2.num_additional_wqes = 1;
 832         memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
 833         ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
 834         ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
 835         ofld_req3[0].qp_first_pte[0].lo = *ptbl;
 836
 837         kwqe_arr[2] = (struct kwqe *) ofld_req3;
 838         /* need if we decide to go with multiple KCQE's per conn */
 839         num_kwqes += 1;
 840
 841         if (hba->cnic && hba->cnic->submit_kwqes)
 842                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
 843 }
 844
 845 /**
 846  * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
 847  *
 848  * @hba:                adapter structure pointer
 849  * @ep:                 endpoint (transport indentifier) structure
 850  *
 851  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
 852  */
 853 void bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 854 {
 855         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
 856                 bnx2i_5771x_send_conn_ofld_req(hba, ep);
 857         else
 858                 bnx2i_570x_send_conn_ofld_req(hba, ep);
 859 }
 860
 861
 862 /**
 863  * setup_qp_page_tables - iscsi QP page table setup function
 864  * @ep:         endpoint (transport indentifier) structure
 865  *
 866  * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
 867  *      64-bit address in big endian format. Whereas 10G/sec (57710) requires
 868  *      PT in little endian format
 869  */
 870 static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
 871 {
 872         int num_pages;
 873         u32 *ptbl;
 874         dma_addr_t page;
 875         int cnic_dev_10g;
 876
 877         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 878                 cnic_dev_10g = 1;
 879         else
 880                 cnic_dev_10g = 0;
 881
 882         /* SQ page table */
 883         memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
 884         num_pages = ep->qp.sq_mem_size / PAGE_SIZE;
 885         page = ep->qp.sq_phys;
 886
 887         if (cnic_dev_10g)
 888                 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
 889         else
 890                 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
 891         while (num_pages--) {
 892                 if (cnic_dev_10g) {
 893                         /* PTE is written in little endian format for 57710 */
 894                         *ptbl = (u32) page;
 895                         ptbl++;
 896                         *ptbl = (u32) ((u64) page >> 32);
 897                         ptbl++;
 898                         page += PAGE_SIZE;
 899                 } else {
 900                         /* PTE is written in big endian format for
 901                          * 5706/5708/5709 devices */
 902                         *ptbl = (u32) ((u64) page >> 32);
 903                         ptbl++;
 904                         *ptbl = (u32) page;
 905                         ptbl++;
 906                         page += PAGE_SIZE;
 907                 }
 908         }
 909
 910         /* RQ page table */
 911         memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
 912         num_pages = ep->qp.rq_mem_size / PAGE_SIZE;
 913         page = ep->qp.rq_phys;
 914
 915         if (cnic_dev_10g)
 916                 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
 917         else
 918                 ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
 919         while (num_pages--) {
 920                 if (cnic_dev_10g) {
 921                         /* PTE is written in little endian format for 57710 */
 922                         *ptbl = (u32) page;
 923                         ptbl++;
 924                         *ptbl = (u32) ((u64) page >> 32);
 925                         ptbl++;
 926                         page += PAGE_SIZE;
 927                 } else {
 928                         /* PTE is written in big endian format for
 929                          * 5706/5708/5709 devices */
 930                         *ptbl = (u32) ((u64) page >> 32);
 931                         ptbl++;
 932                         *ptbl = (u32) page;
 933                         ptbl++;
 934                         page += PAGE_SIZE;
 935                 }
 936         }
 937
 938         /* CQ page table */
 939         memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
 940         num_pages = ep->qp.cq_mem_size / PAGE_SIZE;
 941         page = ep->qp.cq_phys;
 942
 943         if (cnic_dev_10g)
 944                 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
 945         else
 946                 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
 947         while (num_pages--) {
 948                 if (cnic_dev_10g) {
 949                         /* PTE is written in little endian format for 57710 */
 950                         *ptbl = (u32) page;
 951                         ptbl++;
 952                         *ptbl = (u32) ((u64) page >> 32);
 953                         ptbl++;
 954                         page += PAGE_SIZE;
 955                 } else {
 956                         /* PTE is written in big endian format for
 957                          * 5706/5708/5709 devices */
 958                         *ptbl = (u32) ((u64) page >> 32);
 959                         ptbl++;
 960                         *ptbl = (u32) page;
 961                         ptbl++;
 962                         page += PAGE_SIZE;
 963                 }
 964         }
 965 }
 966
 967
 968 /**
 969  * bnx2i_alloc_qp_resc - allocates required resources for QP.
 970  * @hba:        adapter structure pointer
 971  * @ep:         endpoint (transport indentifier) structure
 972  *
 973  * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
 974  *      memory for SQ/RQ/CQ and page tables. EP structure elements such
 975  *      as producer/consumer indexes/pointers, queue sizes and page table
 976  *      contents are setup
 977  */
 978 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 979 {
 980         struct bnx2i_5771x_cq_db *cq_db;
 981
 982         ep->hba = hba;
 983         ep->conn = NULL;
 984         ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
 985
 986         /* Allocate page table memory for SQ which is page aligned */
 987         ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
 988         ep->qp.sq_mem_size =
 989                 (ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 990         ep->qp.sq_pgtbl_size =
 991                 (ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *);
 992         ep->qp.sq_pgtbl_size =
 993                 (ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 994
 995         ep->qp.sq_pgtbl_virt =
 996                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
 997                                    &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
 998         if (!ep->qp.sq_pgtbl_virt) {
 999                 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
1000                                   ep->qp.sq_pgtbl_size);
1001                 goto mem_alloc_err;
1002         }
1003
1004         /* Allocate memory area for actual SQ element */
1005         ep->qp.sq_virt =
1006                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1007                                    &ep->qp.sq_phys, GFP_KERNEL);
1008         if (!ep->qp.sq_virt) {
1009                 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1010                                   ep->qp.sq_mem_size);
1011                 goto mem_alloc_err;
1012         }
1013
1014         memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
1015         ep->qp.sq_first_qe = ep->qp.sq_virt;
1016         ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1017         ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1018         ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1019         ep->qp.sq_prod_idx = 0;
1020         ep->qp.sq_cons_idx = 0;
1021         ep->qp.sqe_left = hba->max_sqes;
1022
1023         /* Allocate page table memory for CQ which is page aligned */
1024         ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1025         ep->qp.cq_mem_size =
1026                 (ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1027         ep->qp.cq_pgtbl_size =
1028                 (ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *);
1029         ep->qp.cq_pgtbl_size =
1030                 (ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1031
1032         ep->qp.cq_pgtbl_virt =
1033                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1034                                    &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1035         if (!ep->qp.cq_pgtbl_virt) {
1036                 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1037                                   ep->qp.cq_pgtbl_size);
1038                 goto mem_alloc_err;
1039         }
1040
1041         /* Allocate memory area for actual CQ element */
1042         ep->qp.cq_virt =
1043                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1044                                    &ep->qp.cq_phys, GFP_KERNEL);
1045         if (!ep->qp.cq_virt) {
1046                 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1047                                   ep->qp.cq_mem_size);
1048                 goto mem_alloc_err;
1049         }
1050         memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
1051
1052         ep->qp.cq_first_qe = ep->qp.cq_virt;
1053         ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1054         ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1055         ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1056         ep->qp.cq_prod_idx = 0;
1057         ep->qp.cq_cons_idx = 0;
1058         ep->qp.cqe_left = hba->max_cqes;
1059         ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1060         ep->qp.cqe_size = hba->max_cqes;
1061
1062         /* Invalidate all EQ CQE index, req only for 57710 */
1063         cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1064         memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1065
1066         /* Allocate page table memory for RQ which is page aligned */
1067         ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1068         ep->qp.rq_mem_size =
1069                 (ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1070         ep->qp.rq_pgtbl_size =
1071                 (ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *);
1072         ep->qp.rq_pgtbl_size =
1073                 (ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1074
1075         ep->qp.rq_pgtbl_virt =
1076                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1077                                    &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1078         if (!ep->qp.rq_pgtbl_virt) {
1079                 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1080                                   ep->qp.rq_pgtbl_size);
1081                 goto mem_alloc_err;
1082         }
1083
1084         /* Allocate memory area for actual RQ element */
1085         ep->qp.rq_virt =
1086                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1087                                    &ep->qp.rq_phys, GFP_KERNEL);
1088         if (!ep->qp.rq_virt) {
1089                 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1090                                   ep->qp.rq_mem_size);
1091                 goto mem_alloc_err;
1092         }
1093
1094         ep->qp.rq_first_qe = ep->qp.rq_virt;
1095         ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1096         ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1097         ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1098         ep->qp.rq_prod_idx = 0x8000;
1099         ep->qp.rq_cons_idx = 0;
1100         ep->qp.rqe_left = hba->max_rqes;
1101
1102         setup_qp_page_tables(ep);
1103
1104         return 0;
1105
1106 mem_alloc_err:
1107         bnx2i_free_qp_resc(hba, ep);
1108         return -ENOMEM;
1109 }
1110
1111
1112
1113 /**
1114  * bnx2i_free_qp_resc - free memory resources held by QP
1115  * @hba:        adapter structure pointer
1116  * @ep: endpoint (transport indentifier) structure
1117  *
1118  * Free QP resources - SQ/RQ/CQ memory and page tables.
1119  */
1120 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1121 {
1122         if (ep->qp.ctx_base) {
1123                 iounmap(ep->qp.ctx_base);
1124                 ep->qp.ctx_base = NULL;
1125         }
1126         /* Free SQ mem */
1127         if (ep->qp.sq_pgtbl_virt) {
1128                 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1129                                   ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1130                 ep->qp.sq_pgtbl_virt = NULL;
1131                 ep->qp.sq_pgtbl_phys = 0;
1132         }
1133         if (ep->qp.sq_virt) {
1134                 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1135                                   ep->qp.sq_virt, ep->qp.sq_phys);
1136                 ep->qp.sq_virt = NULL;
1137                 ep->qp.sq_phys = 0;
1138         }
1139
1140         /* Free RQ mem */
1141         if (ep->qp.rq_pgtbl_virt) {
1142                 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1143                                   ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1144                 ep->qp.rq_pgtbl_virt = NULL;
1145                 ep->qp.rq_pgtbl_phys = 0;
1146         }
1147         if (ep->qp.rq_virt) {
1148                 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1149                                   ep->qp.rq_virt, ep->qp.rq_phys);
1150                 ep->qp.rq_virt = NULL;
1151                 ep->qp.rq_phys = 0;
1152         }
1153
1154         /* Free CQ mem */
1155         if (ep->qp.cq_pgtbl_virt) {
1156                 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1157                                   ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1158                 ep->qp.cq_pgtbl_virt = NULL;
1159                 ep->qp.cq_pgtbl_phys = 0;
1160         }
1161         if (ep->qp.cq_virt) {
1162                 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1163                                   ep->qp.cq_virt, ep->qp.cq_phys);
1164                 ep->qp.cq_virt = NULL;
1165                 ep->qp.cq_phys = 0;
1166         }
1167 }
1168
1169
1170 /**
1171  * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1172  * @hba:        adapter structure pointer
1173  *
1174  * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1175  *      This results in iSCSi support validation and on-chip context manager
1176  *      initialization.  Firmware completes this handshake with a CQE carrying
1177  *      the result of iscsi support validation. Parameter carried by
1178  *      iscsi init request determines the number of offloaded connection and
1179  *      tolerance level for iscsi protocol violation this hba/chip can support
1180  */
1181 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1182 {
1183         struct kwqe *kwqe_arr[3];
1184         struct iscsi_kwqe_init1 iscsi_init;
1185         struct iscsi_kwqe_init2 iscsi_init2;
1186         int rc = 0;
1187         u64 mask64;
1188
1189         bnx2i_adjust_qp_size(hba);
1190
1191         iscsi_init.flags =
1192                 ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1193         if (en_tcp_dack)
1194                 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1195         iscsi_init.reserved0 = 0;
1196         iscsi_init.num_cqs = 1;
1197         iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1198         iscsi_init.hdr.flags =
1199                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1200
1201         iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1202         iscsi_init.dummy_buffer_addr_hi =
1203                 (u32) ((u64) hba->dummy_buf_dma >> 32);
1204
1205         hba->ctx_ccell_tasks =
1206                         ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1207         iscsi_init.num_ccells_per_conn = hba->num_ccell;
1208         iscsi_init.num_tasks_per_conn = hba->max_sqes;
1209         iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1210         iscsi_init.sq_num_wqes = hba->max_sqes;
1211         iscsi_init.cq_log_wqes_per_page =
1212                 (u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE);
1213         iscsi_init.cq_num_wqes = hba->max_cqes;
1214         iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1215                                    (PAGE_SIZE - 1)) / PAGE_SIZE;
1216         iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1217                                    (PAGE_SIZE - 1)) / PAGE_SIZE;
1218         iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1219         iscsi_init.rq_num_wqes = hba->max_rqes;
1220
1221
1222         iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1223         iscsi_init2.hdr.flags =
1224                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1225         iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1226         mask64 = 0x0ULL;
1227         mask64 |= (
1228                 /* CISCO MDS */
1229                 (1UL <<
1230                   ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1231                 /* HP MSA1510i */
1232                 (1UL <<
1233                   ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1234                 /* EMC */
1235                 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1236         if (error_mask1)
1237                 iscsi_init2.error_bit_map[0] = error_mask1;
1238         else
1239                 iscsi_init2.error_bit_map[0] = (u32) mask64;
1240
1241         if (error_mask2)
1242                 iscsi_init2.error_bit_map[1] = error_mask2;
1243         else
1244                 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1245
1246         iscsi_error_mask = mask64;
1247
1248         kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1249         kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1250
1251         if (hba->cnic && hba->cnic->submit_kwqes)
1252                 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1253         return rc;
1254 }
1255
1256
1257 /**
1258  * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1259  * @conn:       iscsi connection
1260  * @cqe:        pointer to newly DMA'ed CQE entry for processing
1261  *
1262  * process SCSI CMD Response CQE & complete the request to SCSI-ML
1263  */
1264 static int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1265                                        struct bnx2i_conn *bnx2i_conn,
1266                                        struct cqe *cqe)
1267 {
1268         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1269         struct bnx2i_cmd_response *resp_cqe;
1270         struct bnx2i_cmd *bnx2i_cmd;
1271         struct iscsi_task *task;
1272         struct iscsi_cmd_rsp *hdr;
1273         u32 datalen = 0;
1274
1275         resp_cqe = (struct bnx2i_cmd_response *)cqe;
1276         spin_lock(&session->lock);
1277         task = iscsi_itt_to_task(conn,
1278                                  resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1279         if (!task)
1280                 goto fail;
1281
1282         bnx2i_cmd = task->dd_data;
1283
1284         if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1285                 conn->datain_pdus_cnt +=
1286                         resp_cqe->task_stat.read_stat.num_data_outs;
1287                 conn->rxdata_octets +=
1288                         bnx2i_cmd->req.total_data_transfer_length;
1289         } else {
1290                 conn->dataout_pdus_cnt +=
1291                         resp_cqe->task_stat.read_stat.num_data_outs;
1292                 conn->r2t_pdus_cnt +=
1293                         resp_cqe->task_stat.read_stat.num_r2ts;
1294                 conn->txdata_octets +=
1295                         bnx2i_cmd->req.total_data_transfer_length;
1296         }
1297         bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1298
1299         hdr = (struct iscsi_cmd_rsp *)task->hdr;
1300         resp_cqe = (struct bnx2i_cmd_response *)cqe;
1301         hdr->opcode = resp_cqe->op_code;
1302         hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1303         hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1304         hdr->response = resp_cqe->response;
1305         hdr->cmd_status = resp_cqe->status;
1306         hdr->flags = resp_cqe->response_flags;
1307         hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1308
1309         if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1310                 goto done;
1311
1312         if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1313                 datalen = resp_cqe->data_length;
1314                 if (datalen < 2)
1315                         goto done;
1316
1317                 if (datalen > BNX2I_RQ_WQE_SIZE) {
1318                         iscsi_conn_printk(KERN_ERR, conn,
1319                                           "sense data len %d > RQ sz\n",
1320                                           datalen);
1321                         datalen = BNX2I_RQ_WQE_SIZE;
1322                 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1323                         iscsi_conn_printk(KERN_ERR, conn,
1324                                           "sense data len %d > conn data\n",
1325                                           datalen);
1326                         datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1327                 }
1328
1329                 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1330                 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1331         }
1332
1333 done:
1334         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1335                              conn->data, datalen);
1336 fail:
1337         spin_unlock(&session->lock);
1338         return 0;
1339 }
1340
1341
1342 /**
1343  * bnx2i_process_login_resp - this function handles iscsi login response
1344  * @session:            iscsi session pointer
1345  * @bnx2i_conn:         iscsi connection pointer
1346  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1347  *
1348  * process Login Response CQE & complete it to open-iscsi user daemon
1349  */
1350 static int bnx2i_process_login_resp(struct iscsi_session *session,
1351                                     struct bnx2i_conn *bnx2i_conn,
1352                                     struct cqe *cqe)
1353 {
1354         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1355         struct iscsi_task *task;
1356         struct bnx2i_login_response *login;
1357         struct iscsi_login_rsp *resp_hdr;
1358         int pld_len;
1359         int pad_len;
1360
1361         login = (struct bnx2i_login_response *) cqe;
1362         spin_lock(&session->lock);
1363         task = iscsi_itt_to_task(conn,
1364                                  login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1365         if (!task)
1366                 goto done;
1367
1368         resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1369         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1370         resp_hdr->opcode = login->op_code;
1371         resp_hdr->flags = login->response_flags;
1372         resp_hdr->max_version = login->version_max;
1373         resp_hdr->active_version = login->version_active;
1374         resp_hdr->hlength = 0;
1375
1376         hton24(resp_hdr->dlength, login->data_length);
1377         memcpy(resp_hdr->isid, &login->isid_lo, 6);
1378         resp_hdr->tsih = cpu_to_be16(login->tsih);
1379         resp_hdr->itt = task->hdr->itt;
1380         resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1381         resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1382         resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1383         resp_hdr->status_class = login->status_class;
1384         resp_hdr->status_detail = login->status_detail;
1385         pld_len = login->data_length;
1386         bnx2i_conn->gen_pdu.resp_wr_ptr =
1387                                         bnx2i_conn->gen_pdu.resp_buf + pld_len;
1388
1389         pad_len = 0;
1390         if (pld_len & 0x3)
1391                 pad_len = 4 - (pld_len % 4);
1392
1393         if (pad_len) {
1394                 int i = 0;
1395                 for (i = 0; i < pad_len; i++) {
1396                         bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1397                         bnx2i_conn->gen_pdu.resp_wr_ptr++;
1398                 }
1399         }
1400
1401         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1402                 bnx2i_conn->gen_pdu.resp_buf,
1403                 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1404 done:
1405         spin_unlock(&session->lock);
1406         return 0;
1407 }
1408
1409 /**
1410  * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1411  * @session:            iscsi session pointer
1412  * @bnx2i_conn:         iscsi connection pointer
1413  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1414  *
1415  * process iSCSI TMF Response CQE and wake up the driver eh thread.
1416  */
1417 static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1418                                   struct bnx2i_conn *bnx2i_conn,
1419                                   struct cqe *cqe)
1420 {
1421         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1422         struct iscsi_task *task;
1423         struct bnx2i_tmf_response *tmf_cqe;
1424         struct iscsi_tm_rsp *resp_hdr;
1425
1426         tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1427         spin_lock(&session->lock);
1428         task = iscsi_itt_to_task(conn,
1429                                  tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1430         if (!task)
1431                 goto done;
1432
1433         resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1434         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1435         resp_hdr->opcode = tmf_cqe->op_code;
1436         resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1437         resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1438         resp_hdr->itt = task->hdr->itt;
1439         resp_hdr->response = tmf_cqe->response;
1440
1441         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1442 done:
1443         spin_unlock(&session->lock);
1444         return 0;
1445 }
1446
1447 /**
1448  * bnx2i_process_logout_resp - this function handles iscsi logout response
1449  * @session:            iscsi session pointer
1450  * @bnx2i_conn:         iscsi connection pointer
1451  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1452  *
1453  * process iSCSI Logout Response CQE & make function call to
1454  * notify the user daemon.
1455  */
1456 static int bnx2i_process_logout_resp(struct iscsi_session *session,
1457                                      struct bnx2i_conn *bnx2i_conn,
1458                                      struct cqe *cqe)
1459 {
1460         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1461         struct iscsi_task *task;
1462         struct bnx2i_logout_response *logout;
1463         struct iscsi_logout_rsp *resp_hdr;
1464
1465         logout = (struct bnx2i_logout_response *) cqe;
1466         spin_lock(&session->lock);
1467         task = iscsi_itt_to_task(conn,
1468                                  logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1469         if (!task)
1470                 goto done;
1471
1472         resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1473         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1474         resp_hdr->opcode = logout->op_code;
1475         resp_hdr->flags = logout->response;
1476         resp_hdr->hlength = 0;
1477
1478         resp_hdr->itt = task->hdr->itt;
1479         resp_hdr->statsn = task->hdr->exp_statsn;
1480         resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1481         resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1482
1483         resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1484         resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1485
1486         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1487
1488         bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;
1489 done:
1490         spin_unlock(&session->lock);
1491         return 0;
1492 }
1493
1494 /**
1495  * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1496  * @session:            iscsi session pointer
1497  * @bnx2i_conn:         iscsi connection pointer
1498  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1499  *
1500  * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1501  */
1502 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1503                                            struct bnx2i_conn *bnx2i_conn,
1504                                            struct cqe *cqe)
1505 {
1506         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1507         struct bnx2i_nop_in_msg *nop_in;
1508         struct iscsi_task *task;
1509
1510         nop_in = (struct bnx2i_nop_in_msg *)cqe;
1511         spin_lock(&session->lock);
1512         task = iscsi_itt_to_task(conn,
1513                                  nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1514         if (task)
1515                 iscsi_put_task(task);
1516         spin_unlock(&session->lock);
1517 }
1518
1519 /**
1520  * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1521  * @conn:       iscsi connection
1522  *
1523  * Firmware advances RQ producer index for every unsolicited PDU even if
1524  *      payload data length is '0'. This function makes corresponding
1525  *      adjustments on the driver side to match this f/w behavior
1526  */
1527 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1528 {
1529         char dummy_rq_data[2];
1530         bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1531         bnx2i_put_rq_buf(bnx2i_conn, 1);
1532 }
1533
1534
1535 /**
1536  * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1537  * @session:            iscsi session pointer
1538  * @bnx2i_conn:         iscsi connection pointer
1539  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1540  *
1541  * process iSCSI target's proactive iSCSI NOPIN request
1542  */
1543 static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1544                                      struct bnx2i_conn *bnx2i_conn,
1545                                      struct cqe *cqe)
1546 {
1547         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1548         struct iscsi_task *task;
1549         struct bnx2i_nop_in_msg *nop_in;
1550         struct iscsi_nopin *hdr;
1551         u32 itt;
1552         int tgt_async_nop = 0;
1553
1554         nop_in = (struct bnx2i_nop_in_msg *)cqe;
1555         itt = nop_in->itt & ISCSI_NOP_IN_MSG_INDEX;
1556
1557         spin_lock(&session->lock);
1558         hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1559         memset(hdr, 0, sizeof(struct iscsi_hdr));
1560         hdr->opcode = nop_in->op_code;
1561         hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1562         hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1563         hdr->ttt = cpu_to_be32(nop_in->ttt);
1564
1565         if (itt == (u16) RESERVED_ITT) {
1566                 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1567                 hdr->itt = RESERVED_ITT;
1568                 tgt_async_nop = 1;
1569                 goto done;
1570         }
1571
1572         /* this is a response to one of our nop-outs */
1573         task = iscsi_itt_to_task(conn, itt);
1574         if (task) {
1575                 hdr->flags = ISCSI_FLAG_CMD_FINAL;
1576                 hdr->itt = task->hdr->itt;
1577                 hdr->ttt = cpu_to_be32(nop_in->ttt);
1578                 memcpy(hdr->lun, nop_in->lun, 8);
1579         }
1580 done:
1581         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1582         spin_unlock(&session->lock);
1583
1584         return tgt_async_nop;
1585 }
1586
1587
1588 /**
1589  * bnx2i_process_async_mesg - this function handles iscsi async message
1590  * @session:            iscsi session pointer
1591  * @bnx2i_conn:         iscsi connection pointer
1592  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1593  *
1594  * process iSCSI ASYNC Message
1595  */
1596 static void bnx2i_process_async_mesg(struct iscsi_session *session,
1597                                      struct bnx2i_conn *bnx2i_conn,
1598                                      struct cqe *cqe)
1599 {
1600         struct bnx2i_async_msg *async_cqe;
1601         struct iscsi_async *resp_hdr;
1602         u8 async_event;
1603
1604         bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1605
1606         async_cqe = (struct bnx2i_async_msg *)cqe;
1607         async_event = async_cqe->async_event;
1608
1609         if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1610                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1611                                   "async: scsi events not supported\n");
1612                 return;
1613         }
1614
1615         spin_lock(&session->lock);
1616         resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1617         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1618         resp_hdr->opcode = async_cqe->op_code;
1619         resp_hdr->flags = 0x80;
1620
1621         memcpy(resp_hdr->lun, async_cqe->lun, 8);
1622         resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1623         resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1624
1625         resp_hdr->async_event = async_cqe->async_event;
1626         resp_hdr->async_vcode = async_cqe->async_vcode;
1627
1628         resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1629         resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1630         resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1631
1632         __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1633                              (struct iscsi_hdr *)resp_hdr, NULL, 0);
1634         spin_unlock(&session->lock);
1635 }
1636
1637
1638 /**
1639  * bnx2i_process_reject_mesg - process iscsi reject pdu
1640  * @session:            iscsi session pointer
1641  * @bnx2i_conn:         iscsi connection pointer
1642  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1643  *
1644  * process iSCSI REJECT message
1645  */
1646 static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1647                                       struct bnx2i_conn *bnx2i_conn,
1648                                       struct cqe *cqe)
1649 {
1650         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1651         struct bnx2i_reject_msg *reject;
1652         struct iscsi_reject *hdr;
1653
1654         reject = (struct bnx2i_reject_msg *) cqe;
1655         if (reject->data_length) {
1656                 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1657                 bnx2i_put_rq_buf(bnx2i_conn, 1);
1658         } else
1659                 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1660
1661         spin_lock(&session->lock);
1662         hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1663         memset(hdr, 0, sizeof(struct iscsi_hdr));
1664         hdr->opcode = reject->op_code;
1665         hdr->reason = reject->reason;
1666         hton24(hdr->dlength, reject->data_length);
1667         hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1668         hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1669         hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1670         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1671                              reject->data_length);
1672         spin_unlock(&session->lock);
1673 }
1674
1675 /**
1676  * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1677  * @session:            iscsi session pointer
1678  * @bnx2i_conn:         iscsi connection pointer
1679  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1680  *
1681  * process command cleanup response CQE during conn shutdown or error recovery
1682  */
1683 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1684                                            struct bnx2i_conn *bnx2i_conn,
1685                                            struct cqe *cqe)
1686 {
1687         struct bnx2i_cleanup_response *cmd_clean_rsp;
1688         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1689         struct iscsi_task *task;
1690
1691         cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1692         spin_lock(&session->lock);
1693         task = iscsi_itt_to_task(conn,
1694                         cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1695         if (!task)
1696                 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1697                         cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1698         spin_unlock(&session->lock);
1699         complete(&bnx2i_conn->cmd_cleanup_cmpl);
1700 }
1701
1702
1703
1704 /**
1705  * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1706  * @bnx2i_conn:         iscsi connection
1707  *
1708  * this function is called by generic KCQ handler to process all pending CQE's
1709  */
1710 static void bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
1711 {
1712         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1713         struct iscsi_session *session = conn->session;
1714         struct qp_info *qp = &bnx2i_conn->ep->qp;
1715         struct bnx2i_nop_in_msg *nopin;
1716         int tgt_async_msg;
1717
1718         while (1) {
1719                 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1720                 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1721                         break;
1722
1723                 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx)))
1724                         break;
1725
1726                 tgt_async_msg = 0;
1727
1728                 switch (nopin->op_code) {
1729                 case ISCSI_OP_SCSI_CMD_RSP:
1730                 case ISCSI_OP_SCSI_DATA_IN:
1731                         bnx2i_process_scsi_cmd_resp(session, bnx2i_conn,
1732                                                     qp->cq_cons_qe);
1733                         break;
1734                 case ISCSI_OP_LOGIN_RSP:
1735                         bnx2i_process_login_resp(session, bnx2i_conn,
1736                                                  qp->cq_cons_qe);
1737                         break;
1738                 case ISCSI_OP_SCSI_TMFUNC_RSP:
1739                         bnx2i_process_tmf_resp(session, bnx2i_conn,
1740                                                qp->cq_cons_qe);
1741                         break;
1742                 case ISCSI_OP_LOGOUT_RSP:
1743                         bnx2i_process_logout_resp(session, bnx2i_conn,
1744                                                   qp->cq_cons_qe);
1745                         break;
1746                 case ISCSI_OP_NOOP_IN:
1747                         if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
1748                                                      qp->cq_cons_qe))
1749                                 tgt_async_msg = 1;
1750                         break;
1751                 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
1752                         bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
1753                                                        qp->cq_cons_qe);
1754                         break;
1755                 case ISCSI_OP_ASYNC_EVENT:
1756                         bnx2i_process_async_mesg(session, bnx2i_conn,
1757                                                  qp->cq_cons_qe);
1758                         tgt_async_msg = 1;
1759                         break;
1760                 case ISCSI_OP_REJECT:
1761                         bnx2i_process_reject_mesg(session, bnx2i_conn,
1762                                                   qp->cq_cons_qe);
1763                         break;
1764                 case ISCSI_OPCODE_CLEANUP_RESPONSE:
1765                         bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
1766                                                        qp->cq_cons_qe);
1767                         break;
1768                 default:
1769                         printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
1770                                           nopin->op_code);
1771                 }
1772
1773                 if (!tgt_async_msg)
1774                         bnx2i_conn->ep->num_active_cmds--;
1775
1776                 /* clear out in production version only, till beta keep opcode
1777                  * field intact, will be helpful in debugging (context dump)
1778                  * nopin->op_code = 0;
1779                  */
1780                 qp->cqe_exp_seq_sn++;
1781                 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
1782                         qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1783
1784                 if (qp->cq_cons_qe == qp->cq_last_qe) {
1785                         qp->cq_cons_qe = qp->cq_first_qe;
1786                         qp->cq_cons_idx = 0;
1787                 } else {
1788                         qp->cq_cons_qe++;
1789                         qp->cq_cons_idx++;
1790                 }
1791         }
1792         bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1793 }
1794
1795 /**
1796  * bnx2i_fastpath_notification - process global event queue (KCQ)
1797  * @hba:                adapter structure pointer
1798  * @new_cqe_kcqe:       pointer to newly DMA'ed KCQE entry
1799  *
1800  * Fast path event notification handler, KCQ entry carries context id
1801  *      of the connection that has 1 or more pending CQ entries
1802  */
1803 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
1804                                         struct iscsi_kcqe *new_cqe_kcqe)
1805 {
1806         struct bnx2i_conn *conn;
1807         u32 iscsi_cid;
1808
1809         iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
1810         conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1811
1812         if (!conn) {
1813                 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
1814                 return;
1815         }
1816         if (!conn->ep) {
1817                 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
1818                 return;
1819         }
1820
1821         bnx2i_process_new_cqes(conn);
1822 }
1823
1824
1825 /**
1826  * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
1827  * @hba:                adapter structure pointer
1828  * @update_kcqe:        kcqe pointer
1829  *
1830  * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
1831  */
1832 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
1833                                            struct iscsi_kcqe *update_kcqe)
1834 {
1835         struct bnx2i_conn *conn;
1836         u32 iscsi_cid;
1837
1838         iscsi_cid = update_kcqe->iscsi_conn_id;
1839         conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1840
1841         if (!conn) {
1842                 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
1843                 return;
1844         }
1845         if (!conn->ep) {
1846                 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
1847                 return;
1848         }
1849
1850         if (update_kcqe->completion_status) {
1851                 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
1852                 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
1853         } else
1854                 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
1855
1856         wake_up_interruptible(&conn->ep->ofld_wait);
1857 }
1858
1859
1860 /**
1861  * bnx2i_recovery_que_add_conn - add connection to recovery queue
1862  * @hba:                adapter structure pointer
1863  * @bnx2i_conn:         iscsi connection
1864  *
1865  * Add connection to recovery queue and schedule adapter eh worker
1866  */
1867 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
1868                                         struct bnx2i_conn *bnx2i_conn)
1869 {
1870         iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
1871                            ISCSI_ERR_CONN_FAILED);
1872 }
1873
1874
1875 /**
1876  * bnx2i_process_tcp_error - process error notification on a given connection
1877  *
1878  * @hba:                adapter structure pointer
1879  * @tcp_err:            tcp error kcqe pointer
1880  *
1881  * handles tcp level error notifications from FW.
1882  */
1883 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
1884                                     struct iscsi_kcqe *tcp_err)
1885 {
1886         struct bnx2i_conn *bnx2i_conn;
1887         u32 iscsi_cid;
1888
1889         iscsi_cid = tcp_err->iscsi_conn_id;
1890         bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1891
1892         if (!bnx2i_conn) {
1893                 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1894                 return;
1895         }
1896
1897         printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
1898                           iscsi_cid, tcp_err->completion_status);
1899         bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
1900 }
1901
1902
1903 /**
1904  * bnx2i_process_iscsi_error - process error notification on a given connection
1905  * @hba:                adapter structure pointer
1906  * @iscsi_err:          iscsi error kcqe pointer
1907  *
1908  * handles iscsi error notifications from the FW. Firmware based in initial
1909  *      handshake classifies iscsi protocol / TCP rfc violation into either
1910  *      warning or error indications. If indication is of "Error" type, driver
1911  *      will initiate session recovery for that connection/session. For
1912  *      "Warning" type indication, driver will put out a system log message
1913  *      (there will be only one message for each type for the life of the
1914  *      session, this is to avoid un-necessarily overloading the system)
1915  */
1916 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
1917                                       struct iscsi_kcqe *iscsi_err)
1918 {
1919         struct bnx2i_conn *bnx2i_conn;
1920         u32 iscsi_cid;
1921         char warn_notice[] = "iscsi_warning";
1922         char error_notice[] = "iscsi_error";
1923         char additional_notice[64];
1924         char *message;
1925         int need_recovery;
1926         u64 err_mask64;
1927
1928         iscsi_cid = iscsi_err->iscsi_conn_id;
1929         bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1930         if (!bnx2i_conn) {
1931                 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1932                 return;
1933         }
1934
1935         err_mask64 = (0x1ULL << iscsi_err->completion_status);
1936
1937         if (err_mask64 & iscsi_error_mask) {
1938                 need_recovery = 0;
1939                 message = warn_notice;
1940         } else {
1941                 need_recovery = 1;
1942                 message = error_notice;
1943         }
1944
1945         switch (iscsi_err->completion_status) {
1946         case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
1947                 strcpy(additional_notice, "hdr digest err");
1948                 break;
1949         case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
1950                 strcpy(additional_notice, "data digest err");
1951                 break;
1952         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
1953                 strcpy(additional_notice, "wrong opcode rcvd");
1954                 break;
1955         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
1956                 strcpy(additional_notice, "AHS len > 0 rcvd");
1957                 break;
1958         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
1959                 strcpy(additional_notice, "invalid ITT rcvd");
1960                 break;
1961         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
1962                 strcpy(additional_notice, "wrong StatSN rcvd");
1963                 break;
1964         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
1965                 strcpy(additional_notice, "wrong DataSN rcvd");
1966                 break;
1967         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
1968                 strcpy(additional_notice, "pend R2T violation");
1969                 break;
1970         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
1971                 strcpy(additional_notice, "ERL0, UO");
1972                 break;
1973         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
1974                 strcpy(additional_notice, "ERL0, U1");
1975                 break;
1976         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
1977                 strcpy(additional_notice, "ERL0, U2");
1978                 break;
1979         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
1980                 strcpy(additional_notice, "ERL0, U3");
1981                 break;
1982         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
1983                 strcpy(additional_notice, "ERL0, U4");
1984                 break;
1985         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
1986                 strcpy(additional_notice, "ERL0, U5");
1987                 break;
1988         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
1989                 strcpy(additional_notice, "ERL0, U6");
1990                 break;
1991         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
1992                 strcpy(additional_notice, "invalid resi len");
1993                 break;
1994         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
1995                 strcpy(additional_notice, "MRDSL violation");
1996                 break;
1997         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
1998                 strcpy(additional_notice, "F-bit not set");
1999                 break;
2000         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
2001                 strcpy(additional_notice, "invalid TTT");
2002                 break;
2003         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
2004                 strcpy(additional_notice, "invalid DataSN");
2005                 break;
2006         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2007                 strcpy(additional_notice, "burst len violation");
2008                 break;
2009         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2010                 strcpy(additional_notice, "buf offset violation");
2011                 break;
2012         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2013                 strcpy(additional_notice, "invalid LUN field");
2014                 break;
2015         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2016                 strcpy(additional_notice, "invalid R2TSN field");
2017                 break;
2018 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0       \
2019         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2020         case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2021                 strcpy(additional_notice, "invalid cmd len1");
2022                 break;
2023 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1       \
2024         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2025         case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2026                 strcpy(additional_notice, "invalid cmd len2");
2027                 break;
2028         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2029                 strcpy(additional_notice,
2030                        "pend r2t exceeds MaxOutstandingR2T value");
2031                 break;
2032         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2033                 strcpy(additional_notice, "TTT is rsvd");
2034                 break;
2035         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2036                 strcpy(additional_notice, "MBL violation");
2037                 break;
2038 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO         \
2039         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2040         case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2041                 strcpy(additional_notice, "data seg len != 0");
2042                 break;
2043         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2044                 strcpy(additional_notice, "reject pdu len error");
2045                 break;
2046         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2047                 strcpy(additional_notice, "async pdu len error");
2048                 break;
2049         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2050                 strcpy(additional_notice, "nopin pdu len error");
2051                 break;
2052 #define BNX2_ERR_PEND_R2T_IN_CLEANUP                    \
2053         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2054         case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2055                 strcpy(additional_notice, "pend r2t in cleanup");
2056                 break;
2057
2058         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2059                 strcpy(additional_notice, "IP fragments rcvd");
2060                 break;
2061         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2062                 strcpy(additional_notice, "IP options error");
2063                 break;
2064         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2065                 strcpy(additional_notice, "urgent flag error");
2066                 break;
2067         default:
2068                 printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2069                                   iscsi_err->completion_status);
2070         }
2071
2072         if (need_recovery) {
2073                 iscsi_conn_printk(KERN_ALERT,
2074                                   bnx2i_conn->cls_conn->dd_data,
2075                                   "bnx2i: %s - %s\n",
2076                                   message, additional_notice);
2077
2078                 iscsi_conn_printk(KERN_ALERT,
2079                                   bnx2i_conn->cls_conn->dd_data,
2080                                   "conn_err - hostno %d conn %p, "
2081                                   "iscsi_cid %x cid %x\n",
2082                                   bnx2i_conn->hba->shost->host_no,
2083                                   bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2084                                   bnx2i_conn->ep->ep_cid);
2085                 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2086         } else
2087                 if (!test_and_set_bit(iscsi_err->completion_status,
2088                                       (void *) &bnx2i_conn->violation_notified))
2089                         iscsi_conn_printk(KERN_ALERT,
2090                                           bnx2i_conn->cls_conn->dd_data,
2091                                           "bnx2i: %s - %s\n",
2092                                           message, additional_notice);
2093 }
2094
2095
2096 /**
2097  * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2098  * @hba:                adapter structure pointer
2099  * @conn_destroy:       conn destroy kcqe pointer
2100  *
2101  * handles connection destroy completion request.
2102  */
2103 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2104                                             struct iscsi_kcqe *conn_destroy)
2105 {
2106         struct bnx2i_endpoint *ep;
2107
2108         ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2109         if (!ep) {
2110                 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2111                                   "offload request, unexpected complection\n");
2112                 return;
2113         }
2114
2115         if (hba != ep->hba) {
2116                 printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2117                 return;
2118         }
2119
2120         if (conn_destroy->completion_status) {
2121                 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2122                 ep->state = EP_STATE_CLEANUP_FAILED;
2123         } else
2124                 ep->state = EP_STATE_CLEANUP_CMPL;
2125         wake_up_interruptible(&ep->ofld_wait);
2126 }
2127
2128
2129 /**
2130  * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2131  * @hba:                adapter structure pointer
2132  * @ofld_kcqe:          conn offload kcqe pointer
2133  *
2134  * handles initial connection offload completion, ep_connect() thread is
2135  *      woken-up to continue with LLP connect process
2136  */
2137 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2138                                     struct iscsi_kcqe *ofld_kcqe)
2139 {
2140         u32 cid_addr;
2141         struct bnx2i_endpoint *ep;
2142         u32 cid_num;
2143
2144         ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2145         if (!ep) {
2146                 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2147                 return;
2148         }
2149
2150         if (hba != ep->hba) {
2151                 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2152                 return;
2153         }
2154
2155         if (ofld_kcqe->completion_status) {
2156                 if (ofld_kcqe->completion_status ==
2157                     ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2158                         printk(KERN_ALERT "bnx2i: unable to allocate"
2159                                           " iSCSI context resources\n");
2160                 ep->state = EP_STATE_OFLD_FAILED;
2161         } else {
2162                 ep->state = EP_STATE_OFLD_COMPL;
2163                 cid_addr = ofld_kcqe->iscsi_conn_context_id;
2164                 cid_num = bnx2i_get_cid_num(ep);
2165                 ep->ep_cid = cid_addr;
2166                 ep->qp.ctx_base = NULL;
2167         }
2168         wake_up_interruptible(&ep->ofld_wait);
2169 }
2170
2171 /**
2172  * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2173  * @hba:                adapter structure pointer
2174  * @update_kcqe:        kcqe pointer
2175  *
2176  * Generic KCQ event handler/dispatcher
2177  */
2178 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2179                                 u32 num_cqe)
2180 {
2181         struct bnx2i_hba *hba = context;
2182         int i = 0;
2183         struct iscsi_kcqe *ikcqe = NULL;
2184
2185         while (i < num_cqe) {
2186                 ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2187
2188                 if (ikcqe->op_code ==
2189                     ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2190                         bnx2i_fastpath_notification(hba, ikcqe);
2191                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2192                         bnx2i_process_ofld_cmpl(hba, ikcqe);
2193                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2194                         bnx2i_process_update_conn_cmpl(hba, ikcqe);
2195                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2196                         if (ikcqe->completion_status !=
2197                             ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2198                                 bnx2i_iscsi_license_error(hba, ikcqe->\
2199                                                           completion_status);
2200                         else {
2201                                 set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2202                                 bnx2i_get_link_state(hba);
2203                                 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2204                                                  "ISCSI_INIT passed\n",
2205                                                  (u8)hba->pcidev->bus->number,
2206                                                  hba->pci_devno,
2207                                                  (u8)hba->pci_func);
2208
2209
2210                         }
2211                 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2212                         bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2213                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2214                         bnx2i_process_iscsi_error(hba, ikcqe);
2215                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2216                         bnx2i_process_tcp_error(hba, ikcqe);
2217                 else
2218                         printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2219                                           ikcqe->op_code);
2220         }
2221 }
2222
2223
2224 /**
2225  * bnx2i_indicate_netevent - Generic netdev event handler
2226  * @context:    adapter structure pointer
2227  * @event:      event type
2228  *
2229  * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2230  *      NETDEV_GOING_DOWN and NETDEV_CHANGE
2231  */
2232 static void bnx2i_indicate_netevent(void *context, unsigned long event)
2233 {
2234         struct bnx2i_hba *hba = context;
2235
2236         switch (event) {
2237         case NETDEV_UP:
2238                 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2239                         bnx2i_send_fw_iscsi_init_msg(hba);
2240                 break;
2241         case NETDEV_DOWN:
2242                 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2243                 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2244                 break;
2245         case NETDEV_GOING_DOWN:
2246                 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2247                 iscsi_host_for_each_session(hba->shost,
2248                                             bnx2i_drop_session);
2249                 break;
2250         case NETDEV_CHANGE:
2251                 bnx2i_get_link_state(hba);
2252                 break;
2253         default:
2254                 ;
2255         }
2256 }
2257
2258
2259 /**
2260  * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2261  * @cm_sk:              cnic sock structure pointer
2262  *
2263  * function callback exported via bnx2i - cnic driver interface to
2264  *      indicate completion of option-2 TCP connect request.
2265  */
2266 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2267 {
2268         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2269
2270         if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2271                 ep->state = EP_STATE_CONNECT_FAILED;
2272         else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2273                 ep->state = EP_STATE_CONNECT_COMPL;
2274         else
2275                 ep->state = EP_STATE_CONNECT_FAILED;
2276
2277         wake_up_interruptible(&ep->ofld_wait);
2278 }
2279
2280
2281 /**
2282  * bnx2i_cm_close_cmpl - process tcp conn close completion
2283  * @cm_sk:      cnic sock structure pointer
2284  *
2285  * function callback exported via bnx2i - cnic driver interface to
2286  *      indicate completion of option-2 graceful TCP connect shutdown
2287  */
2288 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2289 {
2290         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2291
2292         ep->state = EP_STATE_DISCONN_COMPL;
2293         wake_up_interruptible(&ep->ofld_wait);
2294 }
2295
2296
2297 /**
2298  * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2299  * @cm_sk:      cnic sock structure pointer
2300  *
2301  * function callback exported via bnx2i - cnic driver interface to
2302  *      indicate completion of option-2 abortive TCP connect termination
2303  */
2304 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2305 {
2306         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2307
2308         ep->state = EP_STATE_DISCONN_COMPL;
2309         wake_up_interruptible(&ep->ofld_wait);
2310 }
2311
2312
2313 /**
2314  * bnx2i_cm_remote_close - process received TCP FIN
2315  * @hba:                adapter structure pointer
2316  * @update_kcqe:        kcqe pointer
2317  *
2318  * function callback exported via bnx2i - cnic driver interface to indicate
2319  *      async TCP events such as FIN
2320  */
2321 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2322 {
2323         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2324
2325         ep->state = EP_STATE_TCP_FIN_RCVD;
2326         if (ep->conn)
2327                 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2328 }
2329
2330 /**
2331  * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2332  * @hba:                adapter structure pointer
2333  * @update_kcqe:        kcqe pointer
2334  *
2335  * function callback exported via bnx2i - cnic driver interface to
2336  *      indicate async TCP events (RST) sent by the peer.
2337  */
2338 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2339 {
2340         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2341
2342         ep->state = EP_STATE_TCP_RST_RCVD;
2343         if (ep->conn)
2344                 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2345 }
2346
2347
2348 static void bnx2i_send_nl_mesg(struct cnic_dev *dev, u32 msg_type,
2349                                char *buf, u16 buflen)
2350 {
2351         struct bnx2i_hba *hba;
2352
2353         hba = bnx2i_find_hba_for_cnic(dev);
2354         if (!hba)
2355                 return;
2356
2357         if (iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2358                                    msg_type, buf, buflen))
2359                 printk(KERN_ALERT "bnx2i: private nl message send error\n");
2360
2361 }
2362
2363
2364 /**
2365  * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2366  *                      carrying callback function pointers
2367  *
2368  */
2369 struct cnic_ulp_ops bnx2i_cnic_cb = {
2370         .cnic_init = bnx2i_ulp_init,
2371         .cnic_exit = bnx2i_ulp_exit,
2372         .cnic_start = bnx2i_start,
2373         .cnic_stop = bnx2i_stop,
2374         .indicate_kcqes = bnx2i_indicate_kcqe,
2375         .indicate_netevent = bnx2i_indicate_netevent,
2376         .cm_connect_complete = bnx2i_cm_connect_cmpl,
2377         .cm_close_complete = bnx2i_cm_close_cmpl,
2378         .cm_abort_complete = bnx2i_cm_abort_cmpl,
2379         .cm_remote_close = bnx2i_cm_remote_close,
2380         .cm_remote_abort = bnx2i_cm_remote_abort,
2381         .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2382         .owner = THIS_MODULE
2383 };
2384
2385
2386 /**
2387  * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2388  * @ep: bnx2i endpoint
2389  *
2390  * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2391  *      register in BAR #0. Whereas in 57710 these register are accessed by
2392  *      mapping BAR #1
2393  */
2394 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2395 {
2396         u32 cid_num;
2397         u32 reg_off;
2398         u32 first_l4l5;
2399         u32 ctx_sz;
2400         u32 config2;
2401         resource_size_t reg_base;
2402
2403         cid_num = bnx2i_get_cid_num(ep);
2404
2405         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2406                 reg_base = pci_resource_start(ep->hba->pcidev,
2407                                               BNX2X_DOORBELL_PCI_BAR);
2408                 reg_off = BNX2I_5771X_DBELL_PAGE_SIZE * (cid_num & 0x1FFFF) +
2409                           DPM_TRIGER_TYPE;
2410                 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
2411                 goto arm_cq;
2412         }
2413
2414         reg_base = ep->hba->netdev->base_addr;
2415         if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2416             (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2417                 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2418                 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2419                 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2420                 if (ctx_sz)
2421                         reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2422                                   + BNX2I_570X_PAGE_SIZE_DEFAULT *
2423                                   (((cid_num - first_l4l5) / ctx_sz) + 256);
2424                 else
2425                         reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2426         } else
2427                 /* 5709 device in normal node and 5706/5708 devices */
2428                 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2429
2430         ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off,
2431                                           MB_KERNEL_CTX_SIZE);
2432         if (!ep->qp.ctx_base)
2433                 return -ENOMEM;
2434
2435 arm_cq:
2436         bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2437         return 0;
2438 }