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
 389         bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
 390         tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
 391         tmfabort_wqe = (struct bnx2i_tmf_request *)
 392                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 393
 394         tmfabort_wqe->op_code = tmfabort_hdr->opcode;
 395         tmfabort_wqe->op_attr = tmfabort_hdr->flags;
 396
 397         tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
 398         tmfabort_wqe->reserved2 = 0;
 399         tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
 400
 401         switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
 402         case ISCSI_TM_FUNC_ABORT_TASK:
 403         case ISCSI_TM_FUNC_TASK_REASSIGN:
 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
 408                          * was starting up.
 409                          *
 410                          * Note: In the case of a SCSI cmd timeout, the task's
 411                          *       sc 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                 if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
 418                         dword = (ISCSI_TASK_TYPE_WRITE <<
 419                                  ISCSI_CMD_REQUEST_TYPE_SHIFT);
 420                 else
 421                         dword = (ISCSI_TASK_TYPE_READ <<
 422                                  ISCSI_CMD_REQUEST_TYPE_SHIFT);
 423                 tmfabort_wqe->ref_itt = (dword |
 424                                         (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
 425                 break;
 426         default:
 427                 tmfabort_wqe->ref_itt = RESERVED_ITT;
 428         }
 429         memcpy(tmfabort_wqe->lun, tmfabort_hdr->lun, sizeof(struct scsi_lun));
 430         tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
 431
 432         tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
 433         tmfabort_wqe->bd_list_addr_hi = (u32)
 434                                 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 435         tmfabort_wqe->num_bds = 1;
 436         tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 437
 438         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 439         return 0;
 440 }
 441
 442 /**
 443  * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
 444  * @conn:       iscsi connection
 445  * @cmd:        driver command structure which is requesting
 446  *              a WQE to sent to chip for further processing
 447  *
 448  * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
 449  */
 450 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
 451                              struct bnx2i_cmd *cmd)
 452 {
 453         struct bnx2i_cmd_request *scsi_cmd_wqe;
 454
 455         scsi_cmd_wqe = (struct bnx2i_cmd_request *)
 456                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 457         memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
 458         scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 459
 460         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 461         return 0;
 462 }
 463
 464 /**
 465  * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
 466  * @conn:               iscsi connection
 467  * @cmd:                driver command structure which is requesting
 468  *                      a WQE to sent to chip for further processing
 469  * @datap:              payload buffer pointer
 470  * @data_len:           payload data length
 471  * @unsol:              indicated whether nopout pdu is unsolicited pdu or
 472  *                      in response to target's NOPIN w/ TTT != FFFFFFFF
 473  *
 474  * prepare and post a nopout request WQE to CNIC firmware
 475  */
 476 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
 477                             struct iscsi_task *task,
 478                             char *datap, int data_len, int unsol)
 479 {
 480         struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 481         struct bnx2i_cmd *bnx2i_cmd;
 482         struct bnx2i_nop_out_request *nopout_wqe;
 483         struct iscsi_nopout *nopout_hdr;
 484
 485         bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 486         nopout_hdr = (struct iscsi_nopout *)task->hdr;
 487         nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
 488         nopout_wqe->op_code = nopout_hdr->opcode;
 489         nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
 490         memcpy(nopout_wqe->lun, nopout_hdr->lun, 8);
 491
 492         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 493                 u32 tmp = nopout_hdr->lun[0];
 494                 /* 57710 requires LUN field to be swapped */
 495                 nopout_hdr->lun[0] = nopout_hdr->lun[1];
 496                 nopout_hdr->lun[1] = tmp;
 497         }
 498
 499         nopout_wqe->itt = ((u16)task->itt |
 500                            (ISCSI_TASK_TYPE_MPATH <<
 501                             ISCSI_TMF_REQUEST_TYPE_SHIFT));
 502         nopout_wqe->ttt = nopout_hdr->ttt;
 503         nopout_wqe->flags = 0;
 504         if (!unsol)
 505                 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
 506         else if (nopout_hdr->itt == RESERVED_ITT)
 507                 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
 508
 509         nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
 510         nopout_wqe->data_length = data_len;
 511         if (data_len) {
 512                 /* handle payload data, not required in first release */
 513                 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
 514         } else {
 515                 nopout_wqe->bd_list_addr_lo = (u32)
 516                                         bnx2i_conn->hba->mp_bd_dma;
 517                 nopout_wqe->bd_list_addr_hi =
 518                         (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 519                 nopout_wqe->num_bds = 1;
 520         }
 521         nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 522
 523         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 524         return 0;
 525 }
 526
 527
 528 /**
 529  * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
 530  * @conn:       iscsi connection
 531  * @cmd:        driver command structure which is requesting
 532  *              a WQE to sent to chip for further processing
 533  *
 534  * prepare and post logout request WQE to CNIC firmware
 535  */
 536 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
 537                             struct iscsi_task *task)
 538 {
 539         struct bnx2i_cmd *bnx2i_cmd;
 540         struct bnx2i_logout_request *logout_wqe;
 541         struct iscsi_logout *logout_hdr;
 542
 543         bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
 544         logout_hdr = (struct iscsi_logout *)task->hdr;
 545
 546         logout_wqe = (struct bnx2i_logout_request *)
 547                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 548         memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
 549
 550         logout_wqe->op_code = logout_hdr->opcode;
 551         logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
 552         logout_wqe->op_attr =
 553                         logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
 554         logout_wqe->itt = ((u16)task->itt |
 555                            (ISCSI_TASK_TYPE_MPATH <<
 556                             ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
 557         logout_wqe->data_length = 0;
 558         logout_wqe->cid = 0;
 559
 560         logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
 561         logout_wqe->bd_list_addr_hi = (u32)
 562                                 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 563         logout_wqe->num_bds = 1;
 564         logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 565
 566         bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;
 567
 568         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 569         return 0;
 570 }
 571
 572
 573 /**
 574  * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
 575  * @conn:       iscsi connection which requires iscsi parameter update
 576  *
 577  * sends down iSCSI Conn Update request to move iSCSI conn to FFP
 578  */
 579 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
 580 {
 581         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
 582         struct bnx2i_hba *hba = bnx2i_conn->hba;
 583         struct kwqe *kwqe_arr[2];
 584         struct iscsi_kwqe_conn_update *update_wqe;
 585         struct iscsi_kwqe_conn_update conn_update_kwqe;
 586
 587         update_wqe = &conn_update_kwqe;
 588
 589         update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
 590         update_wqe->hdr.flags =
 591                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 592
 593         /* 5771x requires conn context id to be passed as is */
 594         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
 595                 update_wqe->context_id = bnx2i_conn->ep->ep_cid;
 596         else
 597                 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
 598         update_wqe->conn_flags = 0;
 599         if (conn->hdrdgst_en)
 600                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
 601         if (conn->datadgst_en)
 602                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
 603         if (conn->session->initial_r2t_en)
 604                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
 605         if (conn->session->imm_data_en)
 606                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
 607
 608         update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
 609         update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
 610         update_wqe->first_burst_length = conn->session->first_burst;
 611         update_wqe->max_burst_length = conn->session->max_burst;
 612         update_wqe->exp_stat_sn = conn->exp_statsn;
 613         update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
 614         update_wqe->session_error_recovery_level = conn->session->erl;
 615         iscsi_conn_printk(KERN_ALERT, conn,
 616                           "bnx2i: conn update - MBL 0x%x FBL 0x%x"
 617                           "MRDSL_I 0x%x MRDSL_T 0x%x \n",
 618                           update_wqe->max_burst_length,
 619                           update_wqe->first_burst_length,
 620                           update_wqe->max_recv_pdu_length,
 621                           update_wqe->max_send_pdu_length);
 622
 623         kwqe_arr[0] = (struct kwqe *) update_wqe;
 624         if (hba->cnic && hba->cnic->submit_kwqes)
 625                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
 626 }
 627
 628
 629 /**
 630  * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
 631  * @data:       endpoint (transport handle) structure pointer
 632  *
 633  * routine to handle connection offload/destroy request timeout
 634  */
 635 void bnx2i_ep_ofld_timer(unsigned long data)
 636 {
 637         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;
 638
 639         if (ep->state == EP_STATE_OFLD_START) {
 640                 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
 641                 ep->state = EP_STATE_OFLD_FAILED;
 642         } else if (ep->state == EP_STATE_DISCONN_START) {
 643                 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
 644                 ep->state = EP_STATE_DISCONN_TIMEDOUT;
 645         } else if (ep->state == EP_STATE_CLEANUP_START) {
 646                 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
 647                 ep->state = EP_STATE_CLEANUP_FAILED;
 648         }
 649
 650         wake_up_interruptible(&ep->ofld_wait);
 651 }
 652
 653
 654 static int bnx2i_power_of2(u32 val)
 655 {
 656         u32 power = 0;
 657         if (val & (val - 1))
 658                 return power;
 659         val--;
 660         while (val) {
 661                 val = val >> 1;
 662                 power++;
 663         }
 664         return power;
 665 }
 666
 667
 668 /**
 669  * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
 670  * @hba:        adapter structure pointer
 671  * @cmd:        driver command structure which is requesting
 672  *              a WQE to sent to chip for further processing
 673  *
 674  * prepares and posts CONN_OFLD_REQ1/2 KWQE
 675  */
 676 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
 677 {
 678         struct bnx2i_cleanup_request *cmd_cleanup;
 679
 680         cmd_cleanup =
 681                 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
 682         memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
 683
 684         cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
 685         cmd_cleanup->itt = cmd->req.itt;
 686         cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
 687
 688         bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
 689 }
 690
 691
 692 /**
 693  * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
 694  * @hba:        adapter structure pointer
 695  * @ep:         endpoint (transport indentifier) structure
 696  *
 697  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
 698  *      iscsi connection context clean-up process
 699  */
 700 void bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 701 {
 702         struct kwqe *kwqe_arr[2];
 703         struct iscsi_kwqe_conn_destroy conn_cleanup;
 704
 705         memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
 706
 707         conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
 708         conn_cleanup.hdr.flags =
 709                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 710         /* 5771x requires conn context id to be passed as is */
 711         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 712                 conn_cleanup.context_id = ep->ep_cid;
 713         else
 714                 conn_cleanup.context_id = (ep->ep_cid >> 7);
 715
 716         conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
 717
 718         kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
 719         if (hba->cnic && hba->cnic->submit_kwqes)
 720                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
 721 }
 722
 723
 724 /**
 725  * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
 726  * @hba:                adapter structure pointer
 727  * @ep:                 endpoint (transport indentifier) structure
 728  *
 729  * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 730  */
 731 static void bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
 732                                           struct bnx2i_endpoint *ep)
 733 {
 734         struct kwqe *kwqe_arr[2];
 735         struct iscsi_kwqe_conn_offload1 ofld_req1;
 736         struct iscsi_kwqe_conn_offload2 ofld_req2;
 737         dma_addr_t dma_addr;
 738         int num_kwqes = 2;
 739         u32 *ptbl;
 740
 741         ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
 742         ofld_req1.hdr.flags =
 743                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 744
 745         ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
 746
 747         dma_addr = ep->qp.sq_pgtbl_phys;
 748         ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
 749         ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 750
 751         dma_addr = ep->qp.cq_pgtbl_phys;
 752         ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
 753         ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 754
 755         ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
 756         ofld_req2.hdr.flags =
 757                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 758
 759         dma_addr = ep->qp.rq_pgtbl_phys;
 760         ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
 761         ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 762
 763         ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
 764
 765         ofld_req2.sq_first_pte.hi = *ptbl++;
 766         ofld_req2.sq_first_pte.lo = *ptbl;
 767
 768         ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
 769         ofld_req2.cq_first_pte.hi = *ptbl++;
 770         ofld_req2.cq_first_pte.lo = *ptbl;
 771
 772         kwqe_arr[0] = (struct kwqe *) &ofld_req1;
 773         kwqe_arr[1] = (struct kwqe *) &ofld_req2;
 774         ofld_req2.num_additional_wqes = 0;
 775
 776         if (hba->cnic && hba->cnic->submit_kwqes)
 777                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
 778 }
 779
 780
 781 /**
 782  * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
 783  * @hba:                adapter structure pointer
 784  * @ep:                 endpoint (transport indentifier) structure
 785  *
 786  * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 787  */
 788 static void bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
 789                                            struct bnx2i_endpoint *ep)
 790 {
 791         struct kwqe *kwqe_arr[5];
 792         struct iscsi_kwqe_conn_offload1 ofld_req1;
 793         struct iscsi_kwqe_conn_offload2 ofld_req2;
 794         struct iscsi_kwqe_conn_offload3 ofld_req3[1];
 795         dma_addr_t dma_addr;
 796         int num_kwqes = 2;
 797         u32 *ptbl;
 798
 799         ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
 800         ofld_req1.hdr.flags =
 801                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 802
 803         ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
 804
 805         dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
 806         ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
 807         ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 808
 809         dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
 810         ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
 811         ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 812
 813         ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
 814         ofld_req2.hdr.flags =
 815                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 816
 817         dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
 818         ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
 819         ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 820
 821         ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
 822         ofld_req2.sq_first_pte.hi = *ptbl++;
 823         ofld_req2.sq_first_pte.lo = *ptbl;
 824
 825         ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
 826         ofld_req2.cq_first_pte.hi = *ptbl++;
 827         ofld_req2.cq_first_pte.lo = *ptbl;
 828
 829         kwqe_arr[0] = (struct kwqe *) &ofld_req1;
 830         kwqe_arr[1] = (struct kwqe *) &ofld_req2;
 831
 832         ofld_req2.num_additional_wqes = 1;
 833         memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
 834         ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
 835         ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
 836         ofld_req3[0].qp_first_pte[0].lo = *ptbl;
 837
 838         kwqe_arr[2] = (struct kwqe *) ofld_req3;
 839         /* need if we decide to go with multiple KCQE's per conn */
 840         num_kwqes += 1;
 841
 842         if (hba->cnic && hba->cnic->submit_kwqes)
 843                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
 844 }
 845
 846 /**
 847  * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
 848  *
 849  * @hba:                adapter structure pointer
 850  * @ep:                 endpoint (transport indentifier) structure
 851  *
 852  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
 853  */
 854 void bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 855 {
 856         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
 857                 bnx2i_5771x_send_conn_ofld_req(hba, ep);
 858         else
 859                 bnx2i_570x_send_conn_ofld_req(hba, ep);
 860 }
 861
 862
 863 /**
 864  * setup_qp_page_tables - iscsi QP page table setup function
 865  * @ep:         endpoint (transport indentifier) structure
 866  *
 867  * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
 868  *      64-bit address in big endian format. Whereas 10G/sec (57710) requires
 869  *      PT in little endian format
 870  */
 871 static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
 872 {
 873         int num_pages;
 874         u32 *ptbl;
 875         dma_addr_t page;
 876         int cnic_dev_10g;
 877
 878         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 879                 cnic_dev_10g = 1;
 880         else
 881                 cnic_dev_10g = 0;
 882
 883         /* SQ page table */
 884         memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
 885         num_pages = ep->qp.sq_mem_size / PAGE_SIZE;
 886         page = ep->qp.sq_phys;
 887
 888         if (cnic_dev_10g)
 889                 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
 890         else
 891                 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
 892         while (num_pages--) {
 893                 if (cnic_dev_10g) {
 894                         /* PTE is written in little endian format for 57710 */
 895                         *ptbl = (u32) page;
 896                         ptbl++;
 897                         *ptbl = (u32) ((u64) page >> 32);
 898                         ptbl++;
 899                         page += PAGE_SIZE;
 900                 } else {
 901                         /* PTE is written in big endian format for
 902                          * 5706/5708/5709 devices */
 903                         *ptbl = (u32) ((u64) page >> 32);
 904                         ptbl++;
 905                         *ptbl = (u32) page;
 906                         ptbl++;
 907                         page += PAGE_SIZE;
 908                 }
 909         }
 910
 911         /* RQ page table */
 912         memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
 913         num_pages = ep->qp.rq_mem_size / PAGE_SIZE;
 914         page = ep->qp.rq_phys;
 915
 916         if (cnic_dev_10g)
 917                 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
 918         else
 919                 ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
 920         while (num_pages--) {
 921                 if (cnic_dev_10g) {
 922                         /* PTE is written in little endian format for 57710 */
 923                         *ptbl = (u32) page;
 924                         ptbl++;
 925                         *ptbl = (u32) ((u64) page >> 32);
 926                         ptbl++;
 927                         page += PAGE_SIZE;
 928                 } else {
 929                         /* PTE is written in big endian format for
 930                          * 5706/5708/5709 devices */
 931                         *ptbl = (u32) ((u64) page >> 32);
 932                         ptbl++;
 933                         *ptbl = (u32) page;
 934                         ptbl++;
 935                         page += PAGE_SIZE;
 936                 }
 937         }
 938
 939         /* CQ page table */
 940         memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
 941         num_pages = ep->qp.cq_mem_size / PAGE_SIZE;
 942         page = ep->qp.cq_phys;
 943
 944         if (cnic_dev_10g)
 945                 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
 946         else
 947                 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
 948         while (num_pages--) {
 949                 if (cnic_dev_10g) {
 950                         /* PTE is written in little endian format for 57710 */
 951                         *ptbl = (u32) page;
 952                         ptbl++;
 953                         *ptbl = (u32) ((u64) page >> 32);
 954                         ptbl++;
 955                         page += PAGE_SIZE;
 956                 } else {
 957                         /* PTE is written in big endian format for
 958                          * 5706/5708/5709 devices */
 959                         *ptbl = (u32) ((u64) page >> 32);
 960                         ptbl++;
 961                         *ptbl = (u32) page;
 962                         ptbl++;
 963                         page += PAGE_SIZE;
 964                 }
 965         }
 966 }
 967
 968
 969 /**
 970  * bnx2i_alloc_qp_resc - allocates required resources for QP.
 971  * @hba:        adapter structure pointer
 972  * @ep:         endpoint (transport indentifier) structure
 973  *
 974  * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
 975  *      memory for SQ/RQ/CQ and page tables. EP structure elements such
 976  *      as producer/consumer indexes/pointers, queue sizes and page table
 977  *      contents are setup
 978  */
 979 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 980 {
 981         struct bnx2i_5771x_cq_db *cq_db;
 982
 983         ep->hba = hba;
 984         ep->conn = NULL;
 985         ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
 986
 987         /* Allocate page table memory for SQ which is page aligned */
 988         ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
 989         ep->qp.sq_mem_size =
 990                 (ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 991         ep->qp.sq_pgtbl_size =
 992                 (ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *);
 993         ep->qp.sq_pgtbl_size =
 994                 (ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 995
 996         ep->qp.sq_pgtbl_virt =
 997                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
 998                                    &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
 999         if (!ep->qp.sq_pgtbl_virt) {
1000                 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
1001                                   ep->qp.sq_pgtbl_size);
1002                 goto mem_alloc_err;
1003         }
1004
1005         /* Allocate memory area for actual SQ element */
1006         ep->qp.sq_virt =
1007                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1008                                    &ep->qp.sq_phys, GFP_KERNEL);
1009         if (!ep->qp.sq_virt) {
1010                 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1011                                   ep->qp.sq_mem_size);
1012                 goto mem_alloc_err;
1013         }
1014
1015         memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
1016         ep->qp.sq_first_qe = ep->qp.sq_virt;
1017         ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1018         ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1019         ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1020         ep->qp.sq_prod_idx = 0;
1021         ep->qp.sq_cons_idx = 0;
1022         ep->qp.sqe_left = hba->max_sqes;
1023
1024         /* Allocate page table memory for CQ which is page aligned */
1025         ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1026         ep->qp.cq_mem_size =
1027                 (ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1028         ep->qp.cq_pgtbl_size =
1029                 (ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *);
1030         ep->qp.cq_pgtbl_size =
1031                 (ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1032
1033         ep->qp.cq_pgtbl_virt =
1034                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1035                                    &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1036         if (!ep->qp.cq_pgtbl_virt) {
1037                 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1038                                   ep->qp.cq_pgtbl_size);
1039                 goto mem_alloc_err;
1040         }
1041
1042         /* Allocate memory area for actual CQ element */
1043         ep->qp.cq_virt =
1044                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1045                                    &ep->qp.cq_phys, GFP_KERNEL);
1046         if (!ep->qp.cq_virt) {
1047                 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1048                                   ep->qp.cq_mem_size);
1049                 goto mem_alloc_err;
1050         }
1051         memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
1052
1053         ep->qp.cq_first_qe = ep->qp.cq_virt;
1054         ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1055         ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1056         ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1057         ep->qp.cq_prod_idx = 0;
1058         ep->qp.cq_cons_idx = 0;
1059         ep->qp.cqe_left = hba->max_cqes;
1060         ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1061         ep->qp.cqe_size = hba->max_cqes;
1062
1063         /* Invalidate all EQ CQE index, req only for 57710 */
1064         cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1065         memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1066
1067         /* Allocate page table memory for RQ which is page aligned */
1068         ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1069         ep->qp.rq_mem_size =
1070                 (ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1071         ep->qp.rq_pgtbl_size =
1072                 (ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *);
1073         ep->qp.rq_pgtbl_size =
1074                 (ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1075
1076         ep->qp.rq_pgtbl_virt =
1077                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1078                                    &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1079         if (!ep->qp.rq_pgtbl_virt) {
1080                 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1081                                   ep->qp.rq_pgtbl_size);
1082                 goto mem_alloc_err;
1083         }
1084
1085         /* Allocate memory area for actual RQ element */
1086         ep->qp.rq_virt =
1087                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1088                                    &ep->qp.rq_phys, GFP_KERNEL);
1089         if (!ep->qp.rq_virt) {
1090                 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1091                                   ep->qp.rq_mem_size);
1092                 goto mem_alloc_err;
1093         }
1094
1095         ep->qp.rq_first_qe = ep->qp.rq_virt;
1096         ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1097         ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1098         ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1099         ep->qp.rq_prod_idx = 0x8000;
1100         ep->qp.rq_cons_idx = 0;
1101         ep->qp.rqe_left = hba->max_rqes;
1102
1103         setup_qp_page_tables(ep);
1104
1105         return 0;
1106
1107 mem_alloc_err:
1108         bnx2i_free_qp_resc(hba, ep);
1109         return -ENOMEM;
1110 }
1111
1112
1113
1114 /**
1115  * bnx2i_free_qp_resc - free memory resources held by QP
1116  * @hba:        adapter structure pointer
1117  * @ep: endpoint (transport indentifier) structure
1118  *
1119  * Free QP resources - SQ/RQ/CQ memory and page tables.
1120  */
1121 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1122 {
1123         if (ep->qp.ctx_base) {
1124                 iounmap(ep->qp.ctx_base);
1125                 ep->qp.ctx_base = NULL;
1126         }
1127         /* Free SQ mem */
1128         if (ep->qp.sq_pgtbl_virt) {
1129                 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1130                                   ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1131                 ep->qp.sq_pgtbl_virt = NULL;
1132                 ep->qp.sq_pgtbl_phys = 0;
1133         }
1134         if (ep->qp.sq_virt) {
1135                 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1136                                   ep->qp.sq_virt, ep->qp.sq_phys);
1137                 ep->qp.sq_virt = NULL;
1138                 ep->qp.sq_phys = 0;
1139         }
1140
1141         /* Free RQ mem */
1142         if (ep->qp.rq_pgtbl_virt) {
1143                 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1144                                   ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1145                 ep->qp.rq_pgtbl_virt = NULL;
1146                 ep->qp.rq_pgtbl_phys = 0;
1147         }
1148         if (ep->qp.rq_virt) {
1149                 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1150                                   ep->qp.rq_virt, ep->qp.rq_phys);
1151                 ep->qp.rq_virt = NULL;
1152                 ep->qp.rq_phys = 0;
1153         }
1154
1155         /* Free CQ mem */
1156         if (ep->qp.cq_pgtbl_virt) {
1157                 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1158                                   ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1159                 ep->qp.cq_pgtbl_virt = NULL;
1160                 ep->qp.cq_pgtbl_phys = 0;
1161         }
1162         if (ep->qp.cq_virt) {
1163                 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1164                                   ep->qp.cq_virt, ep->qp.cq_phys);
1165                 ep->qp.cq_virt = NULL;
1166                 ep->qp.cq_phys = 0;
1167         }
1168 }
1169
1170
1171 /**
1172  * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1173  * @hba:        adapter structure pointer
1174  *
1175  * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1176  *      This results in iSCSi support validation and on-chip context manager
1177  *      initialization.  Firmware completes this handshake with a CQE carrying
1178  *      the result of iscsi support validation. Parameter carried by
1179  *      iscsi init request determines the number of offloaded connection and
1180  *      tolerance level for iscsi protocol violation this hba/chip can support
1181  */
1182 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1183 {
1184         struct kwqe *kwqe_arr[3];
1185         struct iscsi_kwqe_init1 iscsi_init;
1186         struct iscsi_kwqe_init2 iscsi_init2;
1187         int rc = 0;
1188         u64 mask64;
1189
1190         bnx2i_adjust_qp_size(hba);
1191
1192         iscsi_init.flags =
1193                 ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1194         if (en_tcp_dack)
1195                 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1196         iscsi_init.reserved0 = 0;
1197         iscsi_init.num_cqs = 1;
1198         iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1199         iscsi_init.hdr.flags =
1200                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1201
1202         iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1203         iscsi_init.dummy_buffer_addr_hi =
1204                 (u32) ((u64) hba->dummy_buf_dma >> 32);
1205
1206         hba->ctx_ccell_tasks =
1207                         ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1208         iscsi_init.num_ccells_per_conn = hba->num_ccell;
1209         iscsi_init.num_tasks_per_conn = hba->max_sqes;
1210         iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1211         iscsi_init.sq_num_wqes = hba->max_sqes;
1212         iscsi_init.cq_log_wqes_per_page =
1213                 (u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE);
1214         iscsi_init.cq_num_wqes = hba->max_cqes;
1215         iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1216                                    (PAGE_SIZE - 1)) / PAGE_SIZE;
1217         iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1218                                    (PAGE_SIZE - 1)) / PAGE_SIZE;
1219         iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1220         iscsi_init.rq_num_wqes = hba->max_rqes;
1221
1222
1223         iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1224         iscsi_init2.hdr.flags =
1225                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1226         iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1227         mask64 = 0x0ULL;
1228         mask64 |= (
1229                 /* CISCO MDS */
1230                 (1UL <<
1231                   ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1232                 /* HP MSA1510i */
1233                 (1UL <<
1234                   ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1235                 /* EMC */
1236                 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1237         if (error_mask1)
1238                 iscsi_init2.error_bit_map[0] = error_mask1;
1239         else
1240                 iscsi_init2.error_bit_map[0] = (u32) mask64;
1241
1242         if (error_mask2)
1243                 iscsi_init2.error_bit_map[1] = error_mask2;
1244         else
1245                 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1246
1247         iscsi_error_mask = mask64;
1248
1249         kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1250         kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1251
1252         if (hba->cnic && hba->cnic->submit_kwqes)
1253                 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1254         return rc;
1255 }
1256
1257
1258 /**
1259  * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1260  * @conn:       iscsi connection
1261  * @cqe:        pointer to newly DMA'ed CQE entry for processing
1262  *
1263  * process SCSI CMD Response CQE & complete the request to SCSI-ML
1264  */
1265 static int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1266                                        struct bnx2i_conn *bnx2i_conn,
1267                                        struct cqe *cqe)
1268 {
1269         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1270         struct bnx2i_cmd_response *resp_cqe;
1271         struct bnx2i_cmd *bnx2i_cmd;
1272         struct iscsi_task *task;
1273         struct iscsi_cmd_rsp *hdr;
1274         u32 datalen = 0;
1275
1276         resp_cqe = (struct bnx2i_cmd_response *)cqe;
1277         spin_lock(&session->lock);
1278         task = iscsi_itt_to_task(conn,
1279                                  resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1280         if (!task)
1281                 goto fail;
1282
1283         bnx2i_cmd = task->dd_data;
1284
1285         if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1286                 conn->datain_pdus_cnt +=
1287                         resp_cqe->task_stat.read_stat.num_data_outs;
1288                 conn->rxdata_octets +=
1289                         bnx2i_cmd->req.total_data_transfer_length;
1290         } else {
1291                 conn->dataout_pdus_cnt +=
1292                         resp_cqe->task_stat.read_stat.num_data_outs;
1293                 conn->r2t_pdus_cnt +=
1294                         resp_cqe->task_stat.read_stat.num_r2ts;
1295                 conn->txdata_octets +=
1296                         bnx2i_cmd->req.total_data_transfer_length;
1297         }
1298         bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1299
1300         hdr = (struct iscsi_cmd_rsp *)task->hdr;
1301         resp_cqe = (struct bnx2i_cmd_response *)cqe;
1302         hdr->opcode = resp_cqe->op_code;
1303         hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1304         hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1305         hdr->response = resp_cqe->response;
1306         hdr->cmd_status = resp_cqe->status;
1307         hdr->flags = resp_cqe->response_flags;
1308         hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1309
1310         if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1311                 goto done;
1312
1313         if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1314                 datalen = resp_cqe->data_length;
1315                 if (datalen < 2)
1316                         goto done;
1317
1318                 if (datalen > BNX2I_RQ_WQE_SIZE) {
1319                         iscsi_conn_printk(KERN_ERR, conn,
1320                                           "sense data len %d > RQ sz\n",
1321                                           datalen);
1322                         datalen = BNX2I_RQ_WQE_SIZE;
1323                 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1324                         iscsi_conn_printk(KERN_ERR, conn,
1325                                           "sense data len %d > conn data\n",
1326                                           datalen);
1327                         datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1328                 }
1329
1330                 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1331                 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1332         }
1333
1334 done:
1335         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1336                              conn->data, datalen);
1337 fail:
1338         spin_unlock(&session->lock);
1339         return 0;
1340 }
1341
1342
1343 /**
1344  * bnx2i_process_login_resp - this function handles iscsi login response
1345  * @session:            iscsi session pointer
1346  * @bnx2i_conn:         iscsi connection pointer
1347  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1348  *
1349  * process Login Response CQE & complete it to open-iscsi user daemon
1350  */
1351 static int bnx2i_process_login_resp(struct iscsi_session *session,
1352                                     struct bnx2i_conn *bnx2i_conn,
1353                                     struct cqe *cqe)
1354 {
1355         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1356         struct iscsi_task *task;
1357         struct bnx2i_login_response *login;
1358         struct iscsi_login_rsp *resp_hdr;
1359         int pld_len;
1360         int pad_len;
1361
1362         login = (struct bnx2i_login_response *) cqe;
1363         spin_lock(&session->lock);
1364         task = iscsi_itt_to_task(conn,
1365                                  login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1366         if (!task)
1367                 goto done;
1368
1369         resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1370         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1371         resp_hdr->opcode = login->op_code;
1372         resp_hdr->flags = login->response_flags;
1373         resp_hdr->max_version = login->version_max;
1374         resp_hdr->active_version = login->version_active;
1375         resp_hdr->hlength = 0;
1376
1377         hton24(resp_hdr->dlength, login->data_length);
1378         memcpy(resp_hdr->isid, &login->isid_lo, 6);
1379         resp_hdr->tsih = cpu_to_be16(login->tsih);
1380         resp_hdr->itt = task->hdr->itt;
1381         resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1382         resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1383         resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1384         resp_hdr->status_class = login->status_class;
1385         resp_hdr->status_detail = login->status_detail;
1386         pld_len = login->data_length;
1387         bnx2i_conn->gen_pdu.resp_wr_ptr =
1388                                         bnx2i_conn->gen_pdu.resp_buf + pld_len;
1389
1390         pad_len = 0;
1391         if (pld_len & 0x3)
1392                 pad_len = 4 - (pld_len % 4);
1393
1394         if (pad_len) {
1395                 int i = 0;
1396                 for (i = 0; i < pad_len; i++) {
1397                         bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1398                         bnx2i_conn->gen_pdu.resp_wr_ptr++;
1399                 }
1400         }
1401
1402         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1403                 bnx2i_conn->gen_pdu.resp_buf,
1404                 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1405 done:
1406         spin_unlock(&session->lock);
1407         return 0;
1408 }
1409
1410 /**
1411  * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1412  * @session:            iscsi session pointer
1413  * @bnx2i_conn:         iscsi connection pointer
1414  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1415  *
1416  * process iSCSI TMF Response CQE and wake up the driver eh thread.
1417  */
1418 static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1419                                   struct bnx2i_conn *bnx2i_conn,
1420                                   struct cqe *cqe)
1421 {
1422         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1423         struct iscsi_task *task;
1424         struct bnx2i_tmf_response *tmf_cqe;
1425         struct iscsi_tm_rsp *resp_hdr;
1426
1427         tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1428         spin_lock(&session->lock);
1429         task = iscsi_itt_to_task(conn,
1430                                  tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1431         if (!task)
1432                 goto done;
1433
1434         resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1435         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1436         resp_hdr->opcode = tmf_cqe->op_code;
1437         resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1438         resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1439         resp_hdr->itt = task->hdr->itt;
1440         resp_hdr->response = tmf_cqe->response;
1441
1442         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1443 done:
1444         spin_unlock(&session->lock);
1445         return 0;
1446 }
1447
1448 /**
1449  * bnx2i_process_logout_resp - this function handles iscsi logout response
1450  * @session:            iscsi session pointer
1451  * @bnx2i_conn:         iscsi connection pointer
1452  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1453  *
1454  * process iSCSI Logout Response CQE & make function call to
1455  * notify the user daemon.
1456  */
1457 static int bnx2i_process_logout_resp(struct iscsi_session *session,
1458                                      struct bnx2i_conn *bnx2i_conn,
1459                                      struct cqe *cqe)
1460 {
1461         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1462         struct iscsi_task *task;
1463         struct bnx2i_logout_response *logout;
1464         struct iscsi_logout_rsp *resp_hdr;
1465
1466         logout = (struct bnx2i_logout_response *) cqe;
1467         spin_lock(&session->lock);
1468         task = iscsi_itt_to_task(conn,
1469                                  logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1470         if (!task)
1471                 goto done;
1472
1473         resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1474         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1475         resp_hdr->opcode = logout->op_code;
1476         resp_hdr->flags = logout->response;
1477         resp_hdr->hlength = 0;
1478
1479         resp_hdr->itt = task->hdr->itt;
1480         resp_hdr->statsn = task->hdr->exp_statsn;
1481         resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1482         resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1483
1484         resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1485         resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1486
1487         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1488
1489         bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;
1490 done:
1491         spin_unlock(&session->lock);
1492         return 0;
1493 }
1494
1495 /**
1496  * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1497  * @session:            iscsi session pointer
1498  * @bnx2i_conn:         iscsi connection pointer
1499  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1500  *
1501  * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1502  */
1503 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1504                                            struct bnx2i_conn *bnx2i_conn,
1505                                            struct cqe *cqe)
1506 {
1507         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1508         struct bnx2i_nop_in_msg *nop_in;
1509         struct iscsi_task *task;
1510
1511         nop_in = (struct bnx2i_nop_in_msg *)cqe;
1512         spin_lock(&session->lock);
1513         task = iscsi_itt_to_task(conn,
1514                                  nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1515         if (task)
1516                 iscsi_put_task(task);
1517         spin_unlock(&session->lock);
1518 }
1519
1520 /**
1521  * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1522  * @conn:       iscsi connection
1523  *
1524  * Firmware advances RQ producer index for every unsolicited PDU even if
1525  *      payload data length is '0'. This function makes corresponding
1526  *      adjustments on the driver side to match this f/w behavior
1527  */
1528 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1529 {
1530         char dummy_rq_data[2];
1531         bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1532         bnx2i_put_rq_buf(bnx2i_conn, 1);
1533 }
1534
1535
1536 /**
1537  * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1538  * @session:            iscsi session pointer
1539  * @bnx2i_conn:         iscsi connection pointer
1540  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1541  *
1542  * process iSCSI target's proactive iSCSI NOPIN request
1543  */
1544 static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1545                                      struct bnx2i_conn *bnx2i_conn,
1546                                      struct cqe *cqe)
1547 {
1548         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1549         struct iscsi_task *task;
1550         struct bnx2i_nop_in_msg *nop_in;
1551         struct iscsi_nopin *hdr;
1552         u32 itt;
1553         int tgt_async_nop = 0;
1554
1555         nop_in = (struct bnx2i_nop_in_msg *)cqe;
1556         itt = nop_in->itt & ISCSI_NOP_IN_MSG_INDEX;
1557
1558         spin_lock(&session->lock);
1559         hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1560         memset(hdr, 0, sizeof(struct iscsi_hdr));
1561         hdr->opcode = nop_in->op_code;
1562         hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1563         hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1564         hdr->ttt = cpu_to_be32(nop_in->ttt);
1565
1566         if (itt == (u16) RESERVED_ITT) {
1567                 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1568                 hdr->itt = RESERVED_ITT;
1569                 tgt_async_nop = 1;
1570                 goto done;
1571         }
1572
1573         /* this is a response to one of our nop-outs */
1574         task = iscsi_itt_to_task(conn, itt);
1575         if (task) {
1576                 hdr->flags = ISCSI_FLAG_CMD_FINAL;
1577                 hdr->itt = task->hdr->itt;
1578                 hdr->ttt = cpu_to_be32(nop_in->ttt);
1579                 memcpy(hdr->lun, nop_in->lun, 8);
1580         }
1581 done:
1582         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1583         spin_unlock(&session->lock);
1584
1585         return tgt_async_nop;
1586 }
1587
1588
1589 /**
1590  * bnx2i_process_async_mesg - this function handles iscsi async message
1591  * @session:            iscsi session pointer
1592  * @bnx2i_conn:         iscsi connection pointer
1593  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1594  *
1595  * process iSCSI ASYNC Message
1596  */
1597 static void bnx2i_process_async_mesg(struct iscsi_session *session,
1598                                      struct bnx2i_conn *bnx2i_conn,
1599                                      struct cqe *cqe)
1600 {
1601         struct bnx2i_async_msg *async_cqe;
1602         struct iscsi_async *resp_hdr;
1603         u8 async_event;
1604
1605         bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1606
1607         async_cqe = (struct bnx2i_async_msg *)cqe;
1608         async_event = async_cqe->async_event;
1609
1610         if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1611                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1612                                   "async: scsi events not supported\n");
1613                 return;
1614         }
1615
1616         spin_lock(&session->lock);
1617         resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1618         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1619         resp_hdr->opcode = async_cqe->op_code;
1620         resp_hdr->flags = 0x80;
1621
1622         memcpy(resp_hdr->lun, async_cqe->lun, 8);
1623         resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1624         resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1625
1626         resp_hdr->async_event = async_cqe->async_event;
1627         resp_hdr->async_vcode = async_cqe->async_vcode;
1628
1629         resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1630         resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1631         resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1632
1633         __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1634                              (struct iscsi_hdr *)resp_hdr, NULL, 0);
1635         spin_unlock(&session->lock);
1636 }
1637
1638
1639 /**
1640  * bnx2i_process_reject_mesg - process iscsi reject pdu
1641  * @session:            iscsi session pointer
1642  * @bnx2i_conn:         iscsi connection pointer
1643  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1644  *
1645  * process iSCSI REJECT message
1646  */
1647 static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1648                                       struct bnx2i_conn *bnx2i_conn,
1649                                       struct cqe *cqe)
1650 {
1651         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1652         struct bnx2i_reject_msg *reject;
1653         struct iscsi_reject *hdr;
1654
1655         reject = (struct bnx2i_reject_msg *) cqe;
1656         if (reject->data_length) {
1657                 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1658                 bnx2i_put_rq_buf(bnx2i_conn, 1);
1659         } else
1660                 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1661
1662         spin_lock(&session->lock);
1663         hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1664         memset(hdr, 0, sizeof(struct iscsi_hdr));
1665         hdr->opcode = reject->op_code;
1666         hdr->reason = reject->reason;
1667         hton24(hdr->dlength, reject->data_length);
1668         hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1669         hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1670         hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1671         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1672                              reject->data_length);
1673         spin_unlock(&session->lock);
1674 }
1675
1676 /**
1677  * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1678  * @session:            iscsi session pointer
1679  * @bnx2i_conn:         iscsi connection pointer
1680  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1681  *
1682  * process command cleanup response CQE during conn shutdown or error recovery
1683  */
1684 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1685                                            struct bnx2i_conn *bnx2i_conn,
1686                                            struct cqe *cqe)
1687 {
1688         struct bnx2i_cleanup_response *cmd_clean_rsp;
1689         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1690         struct iscsi_task *task;
1691
1692         cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1693         spin_lock(&session->lock);
1694         task = iscsi_itt_to_task(conn,
1695                         cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1696         if (!task)
1697                 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1698                         cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1699         spin_unlock(&session->lock);
1700         complete(&bnx2i_conn->cmd_cleanup_cmpl);
1701 }
1702
1703
1704
1705 /**
1706  * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1707  * @bnx2i_conn:         iscsi connection
1708  *
1709  * this function is called by generic KCQ handler to process all pending CQE's
1710  */
1711 static void bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
1712 {
1713         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1714         struct iscsi_session *session = conn->session;
1715         struct qp_info *qp = &bnx2i_conn->ep->qp;
1716         struct bnx2i_nop_in_msg *nopin;
1717         int tgt_async_msg;
1718
1719         while (1) {
1720                 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1721                 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1722                         break;
1723
1724                 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx)))
1725                         break;
1726
1727                 tgt_async_msg = 0;
1728
1729                 switch (nopin->op_code) {
1730                 case ISCSI_OP_SCSI_CMD_RSP:
1731                 case ISCSI_OP_SCSI_DATA_IN:
1732                         bnx2i_process_scsi_cmd_resp(session, bnx2i_conn,
1733                                                     qp->cq_cons_qe);
1734                         break;
1735                 case ISCSI_OP_LOGIN_RSP:
1736                         bnx2i_process_login_resp(session, bnx2i_conn,
1737                                                  qp->cq_cons_qe);
1738                         break;
1739                 case ISCSI_OP_SCSI_TMFUNC_RSP:
1740                         bnx2i_process_tmf_resp(session, bnx2i_conn,
1741                                                qp->cq_cons_qe);
1742                         break;
1743                 case ISCSI_OP_LOGOUT_RSP:
1744                         bnx2i_process_logout_resp(session, bnx2i_conn,
1745                                                   qp->cq_cons_qe);
1746                         break;
1747                 case ISCSI_OP_NOOP_IN:
1748                         if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
1749                                                      qp->cq_cons_qe))
1750                                 tgt_async_msg = 1;
1751                         break;
1752                 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
1753                         bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
1754                                                        qp->cq_cons_qe);
1755                         break;
1756                 case ISCSI_OP_ASYNC_EVENT:
1757                         bnx2i_process_async_mesg(session, bnx2i_conn,
1758                                                  qp->cq_cons_qe);
1759                         tgt_async_msg = 1;
1760                         break;
1761                 case ISCSI_OP_REJECT:
1762                         bnx2i_process_reject_mesg(session, bnx2i_conn,
1763                                                   qp->cq_cons_qe);
1764                         break;
1765                 case ISCSI_OPCODE_CLEANUP_RESPONSE:
1766                         bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
1767                                                        qp->cq_cons_qe);
1768                         break;
1769                 default:
1770                         printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
1771                                           nopin->op_code);
1772                 }
1773
1774                 if (!tgt_async_msg)
1775                         bnx2i_conn->ep->num_active_cmds--;
1776
1777                 /* clear out in production version only, till beta keep opcode
1778                  * field intact, will be helpful in debugging (context dump)
1779                  * nopin->op_code = 0;
1780                  */
1781                 qp->cqe_exp_seq_sn++;
1782                 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
1783                         qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1784
1785                 if (qp->cq_cons_qe == qp->cq_last_qe) {
1786                         qp->cq_cons_qe = qp->cq_first_qe;
1787                         qp->cq_cons_idx = 0;
1788                 } else {
1789                         qp->cq_cons_qe++;
1790                         qp->cq_cons_idx++;
1791                 }
1792         }
1793         bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1794 }
1795
1796 /**
1797  * bnx2i_fastpath_notification - process global event queue (KCQ)
1798  * @hba:                adapter structure pointer
1799  * @new_cqe_kcqe:       pointer to newly DMA'ed KCQE entry
1800  *
1801  * Fast path event notification handler, KCQ entry carries context id
1802  *      of the connection that has 1 or more pending CQ entries
1803  */
1804 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
1805                                         struct iscsi_kcqe *new_cqe_kcqe)
1806 {
1807         struct bnx2i_conn *conn;
1808         u32 iscsi_cid;
1809
1810         iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
1811         conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1812
1813         if (!conn) {
1814                 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
1815                 return;
1816         }
1817         if (!conn->ep) {
1818                 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
1819                 return;
1820         }
1821
1822         bnx2i_process_new_cqes(conn);
1823 }
1824
1825
1826 /**
1827  * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
1828  * @hba:                adapter structure pointer
1829  * @update_kcqe:        kcqe pointer
1830  *
1831  * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
1832  */
1833 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
1834                                            struct iscsi_kcqe *update_kcqe)
1835 {
1836         struct bnx2i_conn *conn;
1837         u32 iscsi_cid;
1838
1839         iscsi_cid = update_kcqe->iscsi_conn_id;
1840         conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1841
1842         if (!conn) {
1843                 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
1844                 return;
1845         }
1846         if (!conn->ep) {
1847                 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
1848                 return;
1849         }
1850
1851         if (update_kcqe->completion_status) {
1852                 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
1853                 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
1854         } else
1855                 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
1856
1857         wake_up_interruptible(&conn->ep->ofld_wait);
1858 }
1859
1860
1861 /**
1862  * bnx2i_recovery_que_add_conn - add connection to recovery queue
1863  * @hba:                adapter structure pointer
1864  * @bnx2i_conn:         iscsi connection
1865  *
1866  * Add connection to recovery queue and schedule adapter eh worker
1867  */
1868 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
1869                                         struct bnx2i_conn *bnx2i_conn)
1870 {
1871         iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
1872                            ISCSI_ERR_CONN_FAILED);
1873 }
1874
1875
1876 /**
1877  * bnx2i_process_tcp_error - process error notification on a given connection
1878  *
1879  * @hba:                adapter structure pointer
1880  * @tcp_err:            tcp error kcqe pointer
1881  *
1882  * handles tcp level error notifications from FW.
1883  */
1884 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
1885                                     struct iscsi_kcqe *tcp_err)
1886 {
1887         struct bnx2i_conn *bnx2i_conn;
1888         u32 iscsi_cid;
1889
1890         iscsi_cid = tcp_err->iscsi_conn_id;
1891         bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1892
1893         if (!bnx2i_conn) {
1894                 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1895                 return;
1896         }
1897
1898         printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
1899                           iscsi_cid, tcp_err->completion_status);
1900         bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
1901 }
1902
1903
1904 /**
1905  * bnx2i_process_iscsi_error - process error notification on a given connection
1906  * @hba:                adapter structure pointer
1907  * @iscsi_err:          iscsi error kcqe pointer
1908  *
1909  * handles iscsi error notifications from the FW. Firmware based in initial
1910  *      handshake classifies iscsi protocol / TCP rfc violation into either
1911  *      warning or error indications. If indication is of "Error" type, driver
1912  *      will initiate session recovery for that connection/session. For
1913  *      "Warning" type indication, driver will put out a system log message
1914  *      (there will be only one message for each type for the life of the
1915  *      session, this is to avoid un-necessarily overloading the system)
1916  */
1917 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
1918                                       struct iscsi_kcqe *iscsi_err)
1919 {
1920         struct bnx2i_conn *bnx2i_conn;
1921         u32 iscsi_cid;
1922         char warn_notice[] = "iscsi_warning";
1923         char error_notice[] = "iscsi_error";
1924         char additional_notice[64];
1925         char *message;
1926         int need_recovery;
1927         u64 err_mask64;
1928
1929         iscsi_cid = iscsi_err->iscsi_conn_id;
1930         bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1931         if (!bnx2i_conn) {
1932                 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1933                 return;
1934         }
1935
1936         err_mask64 = (0x1ULL << iscsi_err->completion_status);
1937
1938         if (err_mask64 & iscsi_error_mask) {
1939                 need_recovery = 0;
1940                 message = warn_notice;
1941         } else {
1942                 need_recovery = 1;
1943                 message = error_notice;
1944         }
1945
1946         switch (iscsi_err->completion_status) {
1947         case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
1948                 strcpy(additional_notice, "hdr digest err");
1949                 break;
1950         case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
1951                 strcpy(additional_notice, "data digest err");
1952                 break;
1953         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
1954                 strcpy(additional_notice, "wrong opcode rcvd");
1955                 break;
1956         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
1957                 strcpy(additional_notice, "AHS len > 0 rcvd");
1958                 break;
1959         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
1960                 strcpy(additional_notice, "invalid ITT rcvd");
1961                 break;
1962         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
1963                 strcpy(additional_notice, "wrong StatSN rcvd");
1964                 break;
1965         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
1966                 strcpy(additional_notice, "wrong DataSN rcvd");
1967                 break;
1968         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
1969                 strcpy(additional_notice, "pend R2T violation");
1970                 break;
1971         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
1972                 strcpy(additional_notice, "ERL0, UO");
1973                 break;
1974         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
1975                 strcpy(additional_notice, "ERL0, U1");
1976                 break;
1977         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
1978                 strcpy(additional_notice, "ERL0, U2");
1979                 break;
1980         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
1981                 strcpy(additional_notice, "ERL0, U3");
1982                 break;
1983         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
1984                 strcpy(additional_notice, "ERL0, U4");
1985                 break;
1986         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
1987                 strcpy(additional_notice, "ERL0, U5");
1988                 break;
1989         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
1990                 strcpy(additional_notice, "ERL0, U6");
1991                 break;
1992         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
1993                 strcpy(additional_notice, "invalid resi len");
1994                 break;
1995         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
1996                 strcpy(additional_notice, "MRDSL violation");
1997                 break;
1998         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
1999                 strcpy(additional_notice, "F-bit not set");
2000                 break;
2001         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
2002                 strcpy(additional_notice, "invalid TTT");
2003                 break;
2004         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
2005                 strcpy(additional_notice, "invalid DataSN");
2006                 break;
2007         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2008                 strcpy(additional_notice, "burst len violation");
2009                 break;
2010         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2011                 strcpy(additional_notice, "buf offset violation");
2012                 break;
2013         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2014                 strcpy(additional_notice, "invalid LUN field");
2015                 break;
2016         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2017                 strcpy(additional_notice, "invalid R2TSN field");
2018                 break;
2019 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0       \
2020         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2021         case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2022                 strcpy(additional_notice, "invalid cmd len1");
2023                 break;
2024 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1       \
2025         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2026         case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2027                 strcpy(additional_notice, "invalid cmd len2");
2028                 break;
2029         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2030                 strcpy(additional_notice,
2031                        "pend r2t exceeds MaxOutstandingR2T value");
2032                 break;
2033         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2034                 strcpy(additional_notice, "TTT is rsvd");
2035                 break;
2036         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2037                 strcpy(additional_notice, "MBL violation");
2038                 break;
2039 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO         \
2040         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2041         case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2042                 strcpy(additional_notice, "data seg len != 0");
2043                 break;
2044         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2045                 strcpy(additional_notice, "reject pdu len error");
2046                 break;
2047         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2048                 strcpy(additional_notice, "async pdu len error");
2049                 break;
2050         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2051                 strcpy(additional_notice, "nopin pdu len error");
2052                 break;
2053 #define BNX2_ERR_PEND_R2T_IN_CLEANUP                    \
2054         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2055         case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2056                 strcpy(additional_notice, "pend r2t in cleanup");
2057                 break;
2058
2059         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2060                 strcpy(additional_notice, "IP fragments rcvd");
2061                 break;
2062         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2063                 strcpy(additional_notice, "IP options error");
2064                 break;
2065         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2066                 strcpy(additional_notice, "urgent flag error");
2067                 break;
2068         default:
2069                 printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2070                                   iscsi_err->completion_status);
2071         }
2072
2073         if (need_recovery) {
2074                 iscsi_conn_printk(KERN_ALERT,
2075                                   bnx2i_conn->cls_conn->dd_data,
2076                                   "bnx2i: %s - %s\n",
2077                                   message, additional_notice);
2078
2079                 iscsi_conn_printk(KERN_ALERT,
2080                                   bnx2i_conn->cls_conn->dd_data,
2081                                   "conn_err - hostno %d conn %p, "
2082                                   "iscsi_cid %x cid %x\n",
2083                                   bnx2i_conn->hba->shost->host_no,
2084                                   bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2085                                   bnx2i_conn->ep->ep_cid);
2086                 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2087         } else
2088                 if (!test_and_set_bit(iscsi_err->completion_status,
2089                                       (void *) &bnx2i_conn->violation_notified))
2090                         iscsi_conn_printk(KERN_ALERT,
2091                                           bnx2i_conn->cls_conn->dd_data,
2092                                           "bnx2i: %s - %s\n",
2093                                           message, additional_notice);
2094 }
2095
2096
2097 /**
2098  * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2099  * @hba:                adapter structure pointer
2100  * @conn_destroy:       conn destroy kcqe pointer
2101  *
2102  * handles connection destroy completion request.
2103  */
2104 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2105                                             struct iscsi_kcqe *conn_destroy)
2106 {
2107         struct bnx2i_endpoint *ep;
2108
2109         ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2110         if (!ep) {
2111                 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2112                                   "offload request, unexpected complection\n");
2113                 return;
2114         }
2115
2116         if (hba != ep->hba) {
2117                 printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2118                 return;
2119         }
2120
2121         if (conn_destroy->completion_status) {
2122                 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2123                 ep->state = EP_STATE_CLEANUP_FAILED;
2124         } else
2125                 ep->state = EP_STATE_CLEANUP_CMPL;
2126         wake_up_interruptible(&ep->ofld_wait);
2127 }
2128
2129
2130 /**
2131  * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2132  * @hba:                adapter structure pointer
2133  * @ofld_kcqe:          conn offload kcqe pointer
2134  *
2135  * handles initial connection offload completion, ep_connect() thread is
2136  *      woken-up to continue with LLP connect process
2137  */
2138 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2139                                     struct iscsi_kcqe *ofld_kcqe)
2140 {
2141         u32 cid_addr;
2142         struct bnx2i_endpoint *ep;
2143         u32 cid_num;
2144
2145         ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2146         if (!ep) {
2147                 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2148                 return;
2149         }
2150
2151         if (hba != ep->hba) {
2152                 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2153                 return;
2154         }
2155
2156         if (ofld_kcqe->completion_status) {
2157                 if (ofld_kcqe->completion_status ==
2158                     ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2159                         printk(KERN_ALERT "bnx2i: unable to allocate"
2160                                           " iSCSI context resources\n");
2161                 ep->state = EP_STATE_OFLD_FAILED;
2162         } else {
2163                 ep->state = EP_STATE_OFLD_COMPL;
2164                 cid_addr = ofld_kcqe->iscsi_conn_context_id;
2165                 cid_num = bnx2i_get_cid_num(ep);
2166                 ep->ep_cid = cid_addr;
2167                 ep->qp.ctx_base = NULL;
2168         }
2169         wake_up_interruptible(&ep->ofld_wait);
2170 }
2171
2172 /**
2173  * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2174  * @hba:                adapter structure pointer
2175  * @update_kcqe:        kcqe pointer
2176  *
2177  * Generic KCQ event handler/dispatcher
2178  */
2179 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2180                                 u32 num_cqe)
2181 {
2182         struct bnx2i_hba *hba = context;
2183         int i = 0;
2184         struct iscsi_kcqe *ikcqe = NULL;
2185
2186         while (i < num_cqe) {
2187                 ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2188
2189                 if (ikcqe->op_code ==
2190                     ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2191                         bnx2i_fastpath_notification(hba, ikcqe);
2192                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2193                         bnx2i_process_ofld_cmpl(hba, ikcqe);
2194                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2195                         bnx2i_process_update_conn_cmpl(hba, ikcqe);
2196                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2197                         if (ikcqe->completion_status !=
2198                             ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2199                                 bnx2i_iscsi_license_error(hba, ikcqe->\
2200                                                           completion_status);
2201                         else {
2202                                 set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2203                                 bnx2i_get_link_state(hba);
2204                                 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2205                                                  "ISCSI_INIT passed\n",
2206                                                  (u8)hba->pcidev->bus->number,
2207                                                  hba->pci_devno,
2208                                                  (u8)hba->pci_func);
2209
2210
2211                         }
2212                 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2213                         bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2214                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2215                         bnx2i_process_iscsi_error(hba, ikcqe);
2216                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2217                         bnx2i_process_tcp_error(hba, ikcqe);
2218                 else
2219                         printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2220                                           ikcqe->op_code);
2221         }
2222 }
2223
2224
2225 /**
2226  * bnx2i_indicate_netevent - Generic netdev event handler
2227  * @context:    adapter structure pointer
2228  * @event:      event type
2229  *
2230  * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2231  *      NETDEV_GOING_DOWN and NETDEV_CHANGE
2232  */
2233 static void bnx2i_indicate_netevent(void *context, unsigned long event)
2234 {
2235         struct bnx2i_hba *hba = context;
2236
2237         switch (event) {
2238         case NETDEV_UP:
2239                 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2240                         bnx2i_send_fw_iscsi_init_msg(hba);
2241                 break;
2242         case NETDEV_DOWN:
2243                 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2244                 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2245                 break;
2246         case NETDEV_GOING_DOWN:
2247                 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2248                 iscsi_host_for_each_session(hba->shost,
2249                                             bnx2i_drop_session);
2250                 break;
2251         case NETDEV_CHANGE:
2252                 bnx2i_get_link_state(hba);
2253                 break;
2254         default:
2255                 ;
2256         }
2257 }
2258
2259
2260 /**
2261  * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2262  * @cm_sk:              cnic sock structure pointer
2263  *
2264  * function callback exported via bnx2i - cnic driver interface to
2265  *      indicate completion of option-2 TCP connect request.
2266  */
2267 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2268 {
2269         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2270
2271         if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2272                 ep->state = EP_STATE_CONNECT_FAILED;
2273         else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2274                 ep->state = EP_STATE_CONNECT_COMPL;
2275         else
2276                 ep->state = EP_STATE_CONNECT_FAILED;
2277
2278         wake_up_interruptible(&ep->ofld_wait);
2279 }
2280
2281
2282 /**
2283  * bnx2i_cm_close_cmpl - process tcp conn close completion
2284  * @cm_sk:      cnic sock structure pointer
2285  *
2286  * function callback exported via bnx2i - cnic driver interface to
2287  *      indicate completion of option-2 graceful TCP connect shutdown
2288  */
2289 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2290 {
2291         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2292
2293         ep->state = EP_STATE_DISCONN_COMPL;
2294         wake_up_interruptible(&ep->ofld_wait);
2295 }
2296
2297
2298 /**
2299  * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2300  * @cm_sk:      cnic sock structure pointer
2301  *
2302  * function callback exported via bnx2i - cnic driver interface to
2303  *      indicate completion of option-2 abortive TCP connect termination
2304  */
2305 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2306 {
2307         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2308
2309         ep->state = EP_STATE_DISCONN_COMPL;
2310         wake_up_interruptible(&ep->ofld_wait);
2311 }
2312
2313
2314 /**
2315  * bnx2i_cm_remote_close - process received TCP FIN
2316  * @hba:                adapter structure pointer
2317  * @update_kcqe:        kcqe pointer
2318  *
2319  * function callback exported via bnx2i - cnic driver interface to indicate
2320  *      async TCP events such as FIN
2321  */
2322 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2323 {
2324         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2325
2326         ep->state = EP_STATE_TCP_FIN_RCVD;
2327         if (ep->conn)
2328                 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2329 }
2330
2331 /**
2332  * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2333  * @hba:                adapter structure pointer
2334  * @update_kcqe:        kcqe pointer
2335  *
2336  * function callback exported via bnx2i - cnic driver interface to
2337  *      indicate async TCP events (RST) sent by the peer.
2338  */
2339 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2340 {
2341         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2342
2343         ep->state = EP_STATE_TCP_RST_RCVD;
2344         if (ep->conn)
2345                 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2346 }
2347
2348
2349 static void bnx2i_send_nl_mesg(struct cnic_dev *dev, u32 msg_type,
2350                                char *buf, u16 buflen)
2351 {
2352         struct bnx2i_hba *hba;
2353
2354         hba = bnx2i_find_hba_for_cnic(dev);
2355         if (!hba)
2356                 return;
2357
2358         if (iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2359                                    msg_type, buf, buflen))
2360                 printk(KERN_ALERT "bnx2i: private nl message send error\n");
2361
2362 }
2363
2364
2365 /**
2366  * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2367  *                      carrying callback function pointers
2368  *
2369  */
2370 struct cnic_ulp_ops bnx2i_cnic_cb = {
2371         .cnic_init = bnx2i_ulp_init,
2372         .cnic_exit = bnx2i_ulp_exit,
2373         .cnic_start = bnx2i_start,
2374         .cnic_stop = bnx2i_stop,
2375         .indicate_kcqes = bnx2i_indicate_kcqe,
2376         .indicate_netevent = bnx2i_indicate_netevent,
2377         .cm_connect_complete = bnx2i_cm_connect_cmpl,
2378         .cm_close_complete = bnx2i_cm_close_cmpl,
2379         .cm_abort_complete = bnx2i_cm_abort_cmpl,
2380         .cm_remote_close = bnx2i_cm_remote_close,
2381         .cm_remote_abort = bnx2i_cm_remote_abort,
2382         .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2383         .owner = THIS_MODULE
2384 };
2385
2386
2387 /**
2388  * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2389  * @ep: bnx2i endpoint
2390  *
2391  * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2392  *      register in BAR #0. Whereas in 57710 these register are accessed by
2393  *      mapping BAR #1
2394  */
2395 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2396 {
2397         u32 cid_num;
2398         u32 reg_off;
2399         u32 first_l4l5;
2400         u32 ctx_sz;
2401         u32 config2;
2402         resource_size_t reg_base;
2403
2404         cid_num = bnx2i_get_cid_num(ep);
2405
2406         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2407                 reg_base = pci_resource_start(ep->hba->pcidev,
2408                                               BNX2X_DOORBELL_PCI_BAR);
2409                 reg_off = BNX2I_5771X_DBELL_PAGE_SIZE * (cid_num & 0x1FFFF) +
2410                           DPM_TRIGER_TYPE;
2411                 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
2412                 goto arm_cq;
2413         }
2414
2415         reg_base = ep->hba->netdev->base_addr;
2416         if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2417             (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2418                 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2419                 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2420                 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2421                 if (ctx_sz)
2422                         reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2423                                   + BNX2I_570X_PAGE_SIZE_DEFAULT *
2424                                   (((cid_num - first_l4l5) / ctx_sz) + 256);
2425                 else
2426                         reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2427         } else
2428                 /* 5709 device in normal node and 5706/5708 devices */
2429                 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2430
2431         ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off,
2432                                           MB_KERNEL_CTX_SIZE);
2433         if (!ep->qp.ctx_base)
2434                 return -ENOMEM;
2435
2436 arm_cq:
2437         bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2438         return 0;
2439 }