drivers/net/ethernet/qlogic/qed/qed_ll2.c

   1 /* QLogic qed NIC Driver
   2  * Copyright (c) 2015-2017  QLogic Corporation
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and /or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <linux/types.h>
  34 #include <asm/byteorder.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/if_vlan.h>
  37 #include <linux/kernel.h>
  38 #include <linux/pci.h>
  39 #include <linux/slab.h>
  40 #include <linux/stddef.h>
  41 #include <linux/workqueue.h>
  42 #include <net/ipv6.h>
  43 #include <linux/bitops.h>
  44 #include <linux/delay.h>
  45 #include <linux/errno.h>
  46 #include <linux/etherdevice.h>
  47 #include <linux/io.h>
  48 #include <linux/list.h>
  49 #include <linux/mutex.h>
  50 #include <linux/spinlock.h>
  51 #include <linux/string.h>
  52 #include <linux/qed/qed_ll2_if.h>
  53 #include "qed.h"
  54 #include "qed_cxt.h"
  55 #include "qed_dev_api.h"
  56 #include "qed_hsi.h"
  57 #include "qed_hw.h"
  58 #include "qed_int.h"
  59 #include "qed_ll2.h"
  60 #include "qed_mcp.h"
  61 #include "qed_ooo.h"
  62 #include "qed_reg_addr.h"
  63 #include "qed_sp.h"
  64 #include "qed_roce.h"
  65
  66 #define QED_LL2_RX_REGISTERED(ll2)      ((ll2)->rx_queue.b_cb_registred)
  67 #define QED_LL2_TX_REGISTERED(ll2)      ((ll2)->tx_queue.b_cb_registred)
  68
  69 #define QED_LL2_TX_SIZE (256)
  70 #define QED_LL2_RX_SIZE (4096)
  71
  72 struct qed_cb_ll2_info {
  73         int rx_cnt;
  74         u32 rx_size;
  75         u8 handle;
  76
  77         /* Lock protecting LL2 buffer lists in sleepless context */
  78         spinlock_t lock;
  79         struct list_head list;
  80
  81         const struct qed_ll2_cb_ops *cbs;
  82         void *cb_cookie;
  83 };
  84
  85 struct qed_ll2_buffer {
  86         struct list_head list;
  87         void *data;
  88         dma_addr_t phys_addr;
  89 };
  90
  91 static void qed_ll2b_complete_tx_packet(void *cxt,
  92                                         u8 connection_handle,
  93                                         void *cookie,
  94                                         dma_addr_t first_frag_addr,
  95                                         bool b_last_fragment,
  96                                         bool b_last_packet)
  97 {
  98         struct qed_hwfn *p_hwfn = cxt;
  99         struct qed_dev *cdev = p_hwfn->cdev;
 100         struct sk_buff *skb = cookie;
 101
 102         /* All we need to do is release the mapping */
 103         dma_unmap_single(&p_hwfn->cdev->pdev->dev, first_frag_addr,
 104                          skb_headlen(skb), DMA_TO_DEVICE);
 105
 106         if (cdev->ll2->cbs && cdev->ll2->cbs->tx_cb)
 107                 cdev->ll2->cbs->tx_cb(cdev->ll2->cb_cookie, skb,
 108                                       b_last_fragment);
 109
 110         dev_kfree_skb_any(skb);
 111 }
 112
 113 static int qed_ll2_alloc_buffer(struct qed_dev *cdev,
 114                                 u8 **data, dma_addr_t *phys_addr)
 115 {
 116         *data = kmalloc(cdev->ll2->rx_size, GFP_ATOMIC);
 117         if (!(*data)) {
 118                 DP_INFO(cdev, "Failed to allocate LL2 buffer data\n");
 119                 return -ENOMEM;
 120         }
 121
 122         *phys_addr = dma_map_single(&cdev->pdev->dev,
 123                                     ((*data) + NET_SKB_PAD),
 124                                     cdev->ll2->rx_size, DMA_FROM_DEVICE);
 125         if (dma_mapping_error(&cdev->pdev->dev, *phys_addr)) {
 126                 DP_INFO(cdev, "Failed to map LL2 buffer data\n");
 127                 kfree((*data));
 128                 return -ENOMEM;
 129         }
 130
 131         return 0;
 132 }
 133
 134 static int qed_ll2_dealloc_buffer(struct qed_dev *cdev,
 135                                  struct qed_ll2_buffer *buffer)
 136 {
 137         spin_lock_bh(&cdev->ll2->lock);
 138
 139         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
 140                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
 141         kfree(buffer->data);
 142         list_del(&buffer->list);
 143
 144         cdev->ll2->rx_cnt--;
 145         if (!cdev->ll2->rx_cnt)
 146                 DP_INFO(cdev, "All LL2 entries were removed\n");
 147
 148         spin_unlock_bh(&cdev->ll2->lock);
 149
 150         return 0;
 151 }
 152
 153 static void qed_ll2_kill_buffers(struct qed_dev *cdev)
 154 {
 155         struct qed_ll2_buffer *buffer, *tmp_buffer;
 156
 157         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list)
 158                 qed_ll2_dealloc_buffer(cdev, buffer);
 159 }
 160
 161 void qed_ll2b_complete_rx_packet(void *cxt, struct qed_ll2_comp_rx_data *data)
 162 {
 163         struct qed_hwfn *p_hwfn = cxt;
 164         struct qed_ll2_buffer *buffer = data->cookie;
 165         struct qed_dev *cdev = p_hwfn->cdev;
 166         dma_addr_t new_phys_addr;
 167         struct sk_buff *skb;
 168         bool reuse = false;
 169         int rc = -EINVAL;
 170         u8 *new_data;
 171
 172         DP_VERBOSE(p_hwfn,
 173                    (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA),
 174                    "Got an LL2 Rx completion: [Buffer at phys 0x%llx, offset 0x%02x] Length 0x%04x Parse_flags 0x%04x vlan 0x%04x Opaque data [0x%08x:0x%08x]\n",
 175                    (u64)data->rx_buf_addr,
 176                    data->u.placement_offset,
 177                    data->length.packet_length,
 178                    data->parse_flags,
 179                    data->vlan, data->opaque_data_0, data->opaque_data_1);
 180
 181         if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) {
 182                 print_hex_dump(KERN_INFO, "",
 183                                DUMP_PREFIX_OFFSET, 16, 1,
 184                                buffer->data, data->length.packet_length, false);
 185         }
 186
 187         /* Determine if data is valid */
 188         if (data->length.packet_length < ETH_HLEN)
 189                 reuse = true;
 190
 191         /* Allocate a replacement for buffer; Reuse upon failure */
 192         if (!reuse)
 193                 rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data,
 194                                           &new_phys_addr);
 195
 196         /* If need to reuse or there's no replacement buffer, repost this */
 197         if (rc)
 198                 goto out_post;
 199         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
 200                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
 201
 202         skb = build_skb(buffer->data, 0);
 203         if (!skb) {
 204                 rc = -ENOMEM;
 205                 goto out_post;
 206         }
 207
 208         data->u.placement_offset += NET_SKB_PAD;
 209         skb_reserve(skb, data->u.placement_offset);
 210         skb_put(skb, data->length.packet_length);
 211         skb_checksum_none_assert(skb);
 212
 213         /* Get parital ethernet information instead of eth_type_trans(),
 214          * Since we don't have an associated net_device.
 215          */
 216         skb_reset_mac_header(skb);
 217         skb->protocol = eth_hdr(skb)->h_proto;
 218
 219         /* Pass SKB onward */
 220         if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) {
 221                 if (data->vlan)
 222                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 223                                                data->vlan);
 224                 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb,
 225                                       data->opaque_data_0,
 226                                       data->opaque_data_1);
 227         }
 228
 229         /* Update Buffer information and update FW producer */
 230         buffer->data = new_data;
 231         buffer->phys_addr = new_phys_addr;
 232
 233 out_post:
 234         rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), cdev->ll2->handle,
 235                                     buffer->phys_addr, 0,  buffer, 1);
 236
 237         if (rc)
 238                 qed_ll2_dealloc_buffer(cdev, buffer);
 239 }
 240
 241 static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 242                                                     u8 connection_handle,
 243                                                     bool b_lock,
 244                                                     bool b_only_active)
 245 {
 246         struct qed_ll2_info *p_ll2_conn, *p_ret = NULL;
 247
 248         if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS)
 249                 return NULL;
 250
 251         if (!p_hwfn->p_ll2_info)
 252                 return NULL;
 253
 254         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
 255
 256         if (b_only_active) {
 257                 if (b_lock)
 258                         mutex_lock(&p_ll2_conn->mutex);
 259                 if (p_ll2_conn->b_active)
 260                         p_ret = p_ll2_conn;
 261                 if (b_lock)
 262                         mutex_unlock(&p_ll2_conn->mutex);
 263         } else {
 264                 p_ret = p_ll2_conn;
 265         }
 266
 267         return p_ret;
 268 }
 269
 270 static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 271                                                   u8 connection_handle)
 272 {
 273         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true);
 274 }
 275
 276 static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn,
 277                                                        u8 connection_handle)
 278 {
 279         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true);
 280 }
 281
 282 static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn
 283                                                            *p_hwfn,
 284                                                            u8 connection_handle)
 285 {
 286         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false);
 287 }
 288
 289 static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 290 {
 291         bool b_last_packet = false, b_last_frag = false;
 292         struct qed_ll2_tx_packet *p_pkt = NULL;
 293         struct qed_ll2_info *p_ll2_conn;
 294         struct qed_ll2_tx_queue *p_tx;
 295         dma_addr_t tx_frag;
 296
 297         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 298         if (!p_ll2_conn)
 299                 return;
 300
 301         p_tx = &p_ll2_conn->tx_queue;
 302
 303         while (!list_empty(&p_tx->active_descq)) {
 304                 p_pkt = list_first_entry(&p_tx->active_descq,
 305                                          struct qed_ll2_tx_packet, list_entry);
 306                 if (!p_pkt)
 307                         break;
 308
 309                 list_del(&p_pkt->list_entry);
 310                 b_last_packet = list_empty(&p_tx->active_descq);
 311                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 312                 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_ISCSI_OOO) {
 313                         struct qed_ooo_buffer *p_buffer;
 314
 315                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 316                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 317                                                 p_buffer);
 318                 } else {
 319                         p_tx->cur_completing_packet = *p_pkt;
 320                         p_tx->cur_completing_bd_idx = 1;
 321                         b_last_frag =
 322                                 p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 323                         tx_frag = p_pkt->bds_set[0].tx_frag;
 324                         p_ll2_conn->cbs.tx_release_cb(p_ll2_conn->cbs.cookie,
 325                                                       p_ll2_conn->my_id,
 326                                                       p_pkt->cookie,
 327                                                       tx_frag,
 328                                                       b_last_frag,
 329                                                       b_last_packet);
 330                 }
 331         }
 332 }
 333
 334 static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 335 {
 336         struct qed_ll2_info *p_ll2_conn = p_cookie;
 337         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 338         u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0;
 339         struct qed_ll2_tx_packet *p_pkt;
 340         bool b_last_frag = false;
 341         unsigned long flags;
 342         int rc = -EINVAL;
 343
 344         spin_lock_irqsave(&p_tx->lock, flags);
 345         if (p_tx->b_completing_packet) {
 346                 rc = -EBUSY;
 347                 goto out;
 348         }
 349
 350         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 351         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 352         while (num_bds) {
 353                 if (list_empty(&p_tx->active_descq))
 354                         goto out;
 355
 356                 p_pkt = list_first_entry(&p_tx->active_descq,
 357                                          struct qed_ll2_tx_packet, list_entry);
 358                 if (!p_pkt)
 359                         goto out;
 360
 361                 p_tx->b_completing_packet = true;
 362                 p_tx->cur_completing_packet = *p_pkt;
 363                 num_bds_in_packet = p_pkt->bd_used;
 364                 list_del(&p_pkt->list_entry);
 365
 366                 if (num_bds < num_bds_in_packet) {
 367                         DP_NOTICE(p_hwfn,
 368                                   "Rest of BDs does not cover whole packet\n");
 369                         goto out;
 370                 }
 371
 372                 num_bds -= num_bds_in_packet;
 373                 p_tx->bds_idx += num_bds_in_packet;
 374                 while (num_bds_in_packet--)
 375                         qed_chain_consume(&p_tx->txq_chain);
 376
 377                 p_tx->cur_completing_bd_idx = 1;
 378                 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 379                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 380
 381                 spin_unlock_irqrestore(&p_tx->lock, flags);
 382
 383                 p_ll2_conn->cbs.tx_comp_cb(p_ll2_conn->cbs.cookie,
 384                                            p_ll2_conn->my_id,
 385                                            p_pkt->cookie,
 386                                            p_pkt->bds_set[0].tx_frag,
 387                                            b_last_frag, !num_bds);
 388
 389                 spin_lock_irqsave(&p_tx->lock, flags);
 390         }
 391
 392         p_tx->b_completing_packet = false;
 393         rc = 0;
 394 out:
 395         spin_unlock_irqrestore(&p_tx->lock, flags);
 396         return rc;
 397 }
 398
 399 static void qed_ll2_rxq_parse_gsi(struct qed_hwfn *p_hwfn,
 400                                   union core_rx_cqe_union *p_cqe,
 401                                   struct qed_ll2_comp_rx_data *data)
 402 {
 403         data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags);
 404         data->length.data_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length);
 405         data->vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan);
 406         data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi);
 407         data->opaque_data_1 = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo);
 408         data->u.data_length_error = p_cqe->rx_cqe_gsi.data_length_error;
 409 }
 410
 411 static void qed_ll2_rxq_parse_reg(struct qed_hwfn *p_hwfn,
 412                                   union core_rx_cqe_union *p_cqe,
 413                                   struct qed_ll2_comp_rx_data *data)
 414 {
 415         data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_fp.parse_flags.flags);
 416         data->length.packet_length =
 417             le16_to_cpu(p_cqe->rx_cqe_fp.packet_length);
 418         data->vlan = le16_to_cpu(p_cqe->rx_cqe_fp.vlan);
 419         data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[0]);
 420         data->opaque_data_1 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[1]);
 421         data->u.placement_offset = p_cqe->rx_cqe_fp.placement_offset;
 422 }
 423
 424 static int
 425 qed_ll2_rxq_handle_completion(struct qed_hwfn *p_hwfn,
 426                               struct qed_ll2_info *p_ll2_conn,
 427                               union core_rx_cqe_union *p_cqe,
 428                               unsigned long *p_lock_flags, bool b_last_cqe)
 429 {
 430         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 431         struct qed_ll2_rx_packet *p_pkt = NULL;
 432         struct qed_ll2_comp_rx_data data;
 433
 434         if (!list_empty(&p_rx->active_descq))
 435                 p_pkt = list_first_entry(&p_rx->active_descq,
 436                                          struct qed_ll2_rx_packet, list_entry);
 437         if (!p_pkt) {
 438                 DP_NOTICE(p_hwfn,
 439                           "[%d] LL2 Rx completion but active_descq is empty\n",
 440                           p_ll2_conn->input.conn_type);
 441
 442                 return -EIO;
 443         }
 444         list_del(&p_pkt->list_entry);
 445
 446         if (p_cqe->rx_cqe_sp.type == CORE_RX_CQE_TYPE_REGULAR)
 447                 qed_ll2_rxq_parse_reg(p_hwfn, p_cqe, &data);
 448         else
 449                 qed_ll2_rxq_parse_gsi(p_hwfn, p_cqe, &data);
 450         if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)
 451                 DP_NOTICE(p_hwfn,
 452                           "Mismatch between active_descq and the LL2 Rx chain\n");
 453
 454         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 455
 456         data.connection_handle = p_ll2_conn->my_id;
 457         data.cookie = p_pkt->cookie;
 458         data.rx_buf_addr = p_pkt->rx_buf_addr;
 459         data.b_last_packet = b_last_cqe;
 460
 461         spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
 462         p_ll2_conn->cbs.rx_comp_cb(p_ll2_conn->cbs.cookie, &data);
 463
 464         spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
 465
 466         return 0;
 467 }
 468
 469 static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie)
 470 {
 471         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)cookie;
 472         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 473         union core_rx_cqe_union *cqe = NULL;
 474         u16 cq_new_idx = 0, cq_old_idx = 0;
 475         unsigned long flags = 0;
 476         int rc = 0;
 477
 478         spin_lock_irqsave(&p_rx->lock, flags);
 479         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 480         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 481
 482         while (cq_new_idx != cq_old_idx) {
 483                 bool b_last_cqe = (cq_new_idx == cq_old_idx);
 484
 485                 cqe =
 486                     (union core_rx_cqe_union *)
 487                     qed_chain_consume(&p_rx->rcq_chain);
 488                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 489
 490                 DP_VERBOSE(p_hwfn,
 491                            QED_MSG_LL2,
 492                            "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n",
 493                            cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type);
 494
 495                 switch (cqe->rx_cqe_sp.type) {
 496                 case CORE_RX_CQE_TYPE_SLOW_PATH:
 497                         DP_NOTICE(p_hwfn, "LL2 - unexpected Rx CQE slowpath\n");
 498                         rc = -EINVAL;
 499                         break;
 500                 case CORE_RX_CQE_TYPE_GSI_OFFLOAD:
 501                 case CORE_RX_CQE_TYPE_REGULAR:
 502                         rc = qed_ll2_rxq_handle_completion(p_hwfn, p_ll2_conn,
 503                                                            cqe, &flags,
 504                                                            b_last_cqe);
 505                         break;
 506                 default:
 507                         rc = -EIO;
 508                 }
 509         }
 510
 511         spin_unlock_irqrestore(&p_rx->lock, flags);
 512         return rc;
 513 }
 514
 515 static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 516 {
 517         struct qed_ll2_info *p_ll2_conn = NULL;
 518         struct qed_ll2_rx_packet *p_pkt = NULL;
 519         struct qed_ll2_rx_queue *p_rx;
 520
 521         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 522         if (!p_ll2_conn)
 523                 return;
 524
 525         p_rx = &p_ll2_conn->rx_queue;
 526
 527         while (!list_empty(&p_rx->active_descq)) {
 528                 p_pkt = list_first_entry(&p_rx->active_descq,
 529                                          struct qed_ll2_rx_packet, list_entry);
 530                 if (!p_pkt)
 531                         break;
 532
 533                 list_move_tail(&p_pkt->list_entry, &p_rx->free_descq);
 534
 535                 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_ISCSI_OOO) {
 536                         struct qed_ooo_buffer *p_buffer;
 537
 538                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 539                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 540                                                 p_buffer);
 541                 } else {
 542                         dma_addr_t rx_buf_addr = p_pkt->rx_buf_addr;
 543                         void *cookie = p_pkt->cookie;
 544                         bool b_last;
 545
 546                         b_last = list_empty(&p_rx->active_descq);
 547                         p_ll2_conn->cbs.rx_release_cb(p_ll2_conn->cbs.cookie,
 548                                                       p_ll2_conn->my_id,
 549                                                       cookie,
 550                                                       rx_buf_addr, b_last);
 551                 }
 552         }
 553 }
 554
 555 static u8 qed_ll2_convert_rx_parse_to_tx_flags(u16 parse_flags)
 556 {
 557         u8 bd_flags = 0;
 558
 559         if (GET_FIELD(parse_flags, PARSING_AND_ERR_FLAGS_TAG8021QEXIST))
 560                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_VLAN_INSERTION, 1);
 561
 562         return bd_flags;
 563 }
 564
 565 static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn,
 566                                   struct qed_ll2_info *p_ll2_conn)
 567 {
 568         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 569         u16 packet_length = 0, parse_flags = 0, vlan = 0;
 570         struct qed_ll2_rx_packet *p_pkt = NULL;
 571         u32 num_ooo_add_to_peninsula = 0, cid;
 572         union core_rx_cqe_union *cqe = NULL;
 573         u16 cq_new_idx = 0, cq_old_idx = 0;
 574         struct qed_ooo_buffer *p_buffer;
 575         struct ooo_opaque *iscsi_ooo;
 576         u8 placement_offset = 0;
 577         u8 cqe_type;
 578
 579         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 580         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 581         if (cq_new_idx == cq_old_idx)
 582                 return 0;
 583
 584         while (cq_new_idx != cq_old_idx) {
 585                 struct core_rx_fast_path_cqe *p_cqe_fp;
 586
 587                 cqe = qed_chain_consume(&p_rx->rcq_chain);
 588                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 589                 cqe_type = cqe->rx_cqe_sp.type;
 590
 591                 if (cqe_type != CORE_RX_CQE_TYPE_REGULAR) {
 592                         DP_NOTICE(p_hwfn,
 593                                   "Got a non-regular LB LL2 completion [type 0x%02x]\n",
 594                                   cqe_type);
 595                         return -EINVAL;
 596                 }
 597                 p_cqe_fp = &cqe->rx_cqe_fp;
 598
 599                 placement_offset = p_cqe_fp->placement_offset;
 600                 parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags);
 601                 packet_length = le16_to_cpu(p_cqe_fp->packet_length);
 602                 vlan = le16_to_cpu(p_cqe_fp->vlan);
 603                 iscsi_ooo = (struct ooo_opaque *)&p_cqe_fp->opaque_data;
 604                 qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info,
 605                                            iscsi_ooo);
 606                 cid = le32_to_cpu(iscsi_ooo->cid);
 607
 608                 /* Process delete isle first */
 609                 if (iscsi_ooo->drop_size)
 610                         qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid,
 611                                              iscsi_ooo->drop_isle,
 612                                              iscsi_ooo->drop_size);
 613
 614                 if (iscsi_ooo->ooo_opcode == TCP_EVENT_NOP)
 615                         continue;
 616
 617                 /* Now process create/add/join isles */
 618                 if (list_empty(&p_rx->active_descq)) {
 619                         DP_NOTICE(p_hwfn,
 620                                   "LL2 OOO RX chain has no submitted buffers\n"
 621                                   );
 622                         return -EIO;
 623                 }
 624
 625                 p_pkt = list_first_entry(&p_rx->active_descq,
 626                                          struct qed_ll2_rx_packet, list_entry);
 627
 628                 if ((iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE) ||
 629                     (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT) ||
 630                     (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT) ||
 631                     (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_PEN) ||
 632                     (iscsi_ooo->ooo_opcode == TCP_EVENT_JOIN)) {
 633                         if (!p_pkt) {
 634                                 DP_NOTICE(p_hwfn,
 635                                           "LL2 OOO RX packet is not valid\n");
 636                                 return -EIO;
 637                         }
 638                         list_del(&p_pkt->list_entry);
 639                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 640                         p_buffer->packet_length = packet_length;
 641                         p_buffer->parse_flags = parse_flags;
 642                         p_buffer->vlan = vlan;
 643                         p_buffer->placement_offset = placement_offset;
 644                         qed_chain_consume(&p_rx->rxq_chain);
 645                         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 646
 647                         switch (iscsi_ooo->ooo_opcode) {
 648                         case TCP_EVENT_ADD_NEW_ISLE:
 649                                 qed_ooo_add_new_isle(p_hwfn,
 650                                                      p_hwfn->p_ooo_info,
 651                                                      cid,
 652                                                      iscsi_ooo->ooo_isle,
 653                                                      p_buffer);
 654                                 break;
 655                         case TCP_EVENT_ADD_ISLE_RIGHT:
 656                                 qed_ooo_add_new_buffer(p_hwfn,
 657                                                        p_hwfn->p_ooo_info,
 658                                                        cid,
 659                                                        iscsi_ooo->ooo_isle,
 660                                                        p_buffer,
 661                                                        QED_OOO_RIGHT_BUF);
 662                                 break;
 663                         case TCP_EVENT_ADD_ISLE_LEFT:
 664                                 qed_ooo_add_new_buffer(p_hwfn,
 665                                                        p_hwfn->p_ooo_info,
 666                                                        cid,
 667                                                        iscsi_ooo->ooo_isle,
 668                                                        p_buffer,
 669                                                        QED_OOO_LEFT_BUF);
 670                                 break;
 671                         case TCP_EVENT_JOIN:
 672                                 qed_ooo_add_new_buffer(p_hwfn,
 673                                                        p_hwfn->p_ooo_info,
 674                                                        cid,
 675                                                        iscsi_ooo->ooo_isle +
 676                                                        1,
 677                                                        p_buffer,
 678                                                        QED_OOO_LEFT_BUF);
 679                                 qed_ooo_join_isles(p_hwfn,
 680                                                    p_hwfn->p_ooo_info,
 681                                                    cid, iscsi_ooo->ooo_isle);
 682                                 break;
 683                         case TCP_EVENT_ADD_PEN:
 684                                 num_ooo_add_to_peninsula++;
 685                                 qed_ooo_put_ready_buffer(p_hwfn,
 686                                                          p_hwfn->p_ooo_info,
 687                                                          p_buffer, true);
 688                                 break;
 689                         }
 690                 } else {
 691                         DP_NOTICE(p_hwfn,
 692                                   "Unexpected event (%d) TX OOO completion\n",
 693                                   iscsi_ooo->ooo_opcode);
 694                 }
 695         }
 696
 697         return 0;
 698 }
 699
 700 static void
 701 qed_ooo_submit_tx_buffers(struct qed_hwfn *p_hwfn,
 702                           struct qed_ll2_info *p_ll2_conn)
 703 {
 704         struct qed_ll2_tx_pkt_info tx_pkt;
 705         struct qed_ooo_buffer *p_buffer;
 706         u16 l4_hdr_offset_w;
 707         dma_addr_t first_frag;
 708         u16 parse_flags;
 709         u8 bd_flags;
 710         int rc;
 711
 712         /* Submit Tx buffers here */
 713         while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn,
 714                                                     p_hwfn->p_ooo_info))) {
 715                 l4_hdr_offset_w = 0;
 716                 bd_flags = 0;
 717
 718                 first_frag = p_buffer->rx_buffer_phys_addr +
 719                              p_buffer->placement_offset;
 720                 parse_flags = p_buffer->parse_flags;
 721                 bd_flags = qed_ll2_convert_rx_parse_to_tx_flags(parse_flags);
 722                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_FORCE_VLAN_MODE, 1);
 723                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_L4_PROTOCOL, 1);
 724
 725                 memset(&tx_pkt, 0, sizeof(tx_pkt));
 726                 tx_pkt.num_of_bds = 1;
 727                 tx_pkt.vlan = p_buffer->vlan;
 728                 tx_pkt.bd_flags = bd_flags;
 729                 tx_pkt.l4_hdr_offset_w = l4_hdr_offset_w;
 730                 tx_pkt.tx_dest = p_ll2_conn->tx_dest;
 731                 tx_pkt.first_frag = first_frag;
 732                 tx_pkt.first_frag_len = p_buffer->packet_length;
 733                 tx_pkt.cookie = p_buffer;
 734
 735                 rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id,
 736                                                &tx_pkt, true);
 737                 if (rc) {
 738                         qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info,
 739                                                  p_buffer, false);
 740                         break;
 741                 }
 742         }
 743 }
 744
 745 static void
 746 qed_ooo_submit_rx_buffers(struct qed_hwfn *p_hwfn,
 747                           struct qed_ll2_info *p_ll2_conn)
 748 {
 749         struct qed_ooo_buffer *p_buffer;
 750         int rc;
 751
 752         while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
 753                                                    p_hwfn->p_ooo_info))) {
 754                 rc = qed_ll2_post_rx_buffer(p_hwfn,
 755                                             p_ll2_conn->my_id,
 756                                             p_buffer->rx_buffer_phys_addr,
 757                                             0, p_buffer, true);
 758                 if (rc) {
 759                         qed_ooo_put_free_buffer(p_hwfn,
 760                                                 p_hwfn->p_ooo_info, p_buffer);
 761                         break;
 762                 }
 763         }
 764 }
 765
 766 static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 767 {
 768         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
 769         int rc;
 770
 771         rc = qed_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn);
 772         if (rc)
 773                 return rc;
 774
 775         qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
 776         qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
 777
 778         return 0;
 779 }
 780
 781 static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 782 {
 783         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
 784         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 785         struct qed_ll2_tx_packet *p_pkt = NULL;
 786         struct qed_ooo_buffer *p_buffer;
 787         bool b_dont_submit_rx = false;
 788         u16 new_idx = 0, num_bds = 0;
 789         int rc;
 790
 791         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 792         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 793
 794         if (!num_bds)
 795                 return 0;
 796
 797         while (num_bds) {
 798                 if (list_empty(&p_tx->active_descq))
 799                         return -EINVAL;
 800
 801                 p_pkt = list_first_entry(&p_tx->active_descq,
 802                                          struct qed_ll2_tx_packet, list_entry);
 803                 if (!p_pkt)
 804                         return -EINVAL;
 805
 806                 if (p_pkt->bd_used != 1) {
 807                         DP_NOTICE(p_hwfn,
 808                                   "Unexpectedly many BDs(%d) in TX OOO completion\n",
 809                                   p_pkt->bd_used);
 810                         return -EINVAL;
 811                 }
 812
 813                 list_del(&p_pkt->list_entry);
 814
 815                 num_bds--;
 816                 p_tx->bds_idx++;
 817                 qed_chain_consume(&p_tx->txq_chain);
 818
 819                 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 820                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 821
 822                 if (b_dont_submit_rx) {
 823                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 824                                                 p_buffer);
 825                         continue;
 826                 }
 827
 828                 rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id,
 829                                             p_buffer->rx_buffer_phys_addr, 0,
 830                                             p_buffer, true);
 831                 if (rc != 0) {
 832                         qed_ooo_put_free_buffer(p_hwfn,
 833                                                 p_hwfn->p_ooo_info, p_buffer);
 834                         b_dont_submit_rx = true;
 835                 }
 836         }
 837
 838         qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
 839
 840         return 0;
 841 }
 842
 843 static void qed_ll2_stop_ooo(struct qed_dev *cdev)
 844 {
 845         struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
 846         u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
 847
 848         DP_VERBOSE(cdev, QED_MSG_STORAGE, "Stopping LL2 OOO queue [%02x]\n",
 849                    *handle);
 850
 851         qed_ll2_terminate_connection(hwfn, *handle);
 852         qed_ll2_release_connection(hwfn, *handle);
 853         *handle = QED_LL2_UNUSED_HANDLE;
 854 }
 855
 856 static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn,
 857                                      struct qed_ll2_info *p_ll2_conn,
 858                                      u8 action_on_error)
 859 {
 860         enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
 861         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 862         struct core_rx_start_ramrod_data *p_ramrod = NULL;
 863         struct qed_spq_entry *p_ent = NULL;
 864         struct qed_sp_init_data init_data;
 865         u16 cqe_pbl_size;
 866         int rc = 0;
 867
 868         /* Get SPQ entry */
 869         memset(&init_data, 0, sizeof(init_data));
 870         init_data.cid = p_ll2_conn->cid;
 871         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 872         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 873
 874         rc = qed_sp_init_request(p_hwfn, &p_ent,
 875                                  CORE_RAMROD_RX_QUEUE_START,
 876                                  PROTOCOLID_CORE, &init_data);
 877         if (rc)
 878                 return rc;
 879
 880         p_ramrod = &p_ent->ramrod.core_rx_queue_start;
 881
 882         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
 883         p_ramrod->sb_index = p_rx->rx_sb_index;
 884         p_ramrod->complete_event_flg = 1;
 885
 886         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
 887         DMA_REGPAIR_LE(p_ramrod->bd_base, p_rx->rxq_chain.p_phys_addr);
 888         cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain);
 889         p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size);
 890         DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr,
 891                        qed_chain_get_pbl_phys(&p_rx->rcq_chain));
 892
 893         p_ramrod->drop_ttl0_flg = p_ll2_conn->input.rx_drop_ttl0_flg;
 894         p_ramrod->inner_vlan_removal_en = p_ll2_conn->input.rx_vlan_removal_en;
 895         p_ramrod->queue_id = p_ll2_conn->queue_id;
 896         p_ramrod->main_func_queue = (conn_type == QED_LL2_TYPE_ISCSI_OOO) ? 0
 897                                                                           : 1;
 898
 899         if ((IS_MF_DEFAULT(p_hwfn) || IS_MF_SI(p_hwfn)) &&
 900             p_ramrod->main_func_queue && (conn_type != QED_LL2_TYPE_ROCE)) {
 901                 p_ramrod->mf_si_bcast_accept_all = 1;
 902                 p_ramrod->mf_si_mcast_accept_all = 1;
 903         } else {
 904                 p_ramrod->mf_si_bcast_accept_all = 0;
 905                 p_ramrod->mf_si_mcast_accept_all = 0;
 906         }
 907
 908         p_ramrod->action_on_error.error_type = action_on_error;
 909         p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
 910         return qed_spq_post(p_hwfn, p_ent, NULL);
 911 }
 912
 913 static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
 914                                      struct qed_ll2_info *p_ll2_conn)
 915 {
 916         enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
 917         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 918         struct core_tx_start_ramrod_data *p_ramrod = NULL;
 919         struct qed_spq_entry *p_ent = NULL;
 920         struct qed_sp_init_data init_data;
 921         u16 pq_id = 0, pbl_size;
 922         int rc = -EINVAL;
 923
 924         if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
 925                 return 0;
 926
 927         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_ISCSI_OOO)
 928                 p_ll2_conn->tx_stats_en = 0;
 929         else
 930                 p_ll2_conn->tx_stats_en = 1;
 931
 932         /* Get SPQ entry */
 933         memset(&init_data, 0, sizeof(init_data));
 934         init_data.cid = p_ll2_conn->cid;
 935         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 936         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 937
 938         rc = qed_sp_init_request(p_hwfn, &p_ent,
 939                                  CORE_RAMROD_TX_QUEUE_START,
 940                                  PROTOCOLID_CORE, &init_data);
 941         if (rc)
 942                 return rc;
 943
 944         p_ramrod = &p_ent->ramrod.core_tx_queue_start;
 945
 946         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
 947         p_ramrod->sb_index = p_tx->tx_sb_index;
 948         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
 949         p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
 950         p_ramrod->stats_id = p_ll2_conn->tx_stats_id;
 951
 952         DMA_REGPAIR_LE(p_ramrod->pbl_base_addr,
 953                        qed_chain_get_pbl_phys(&p_tx->txq_chain));
 954         pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain);
 955         p_ramrod->pbl_size = cpu_to_le16(pbl_size);
 956
 957         switch (p_ll2_conn->input.tx_tc) {
 958         case LB_TC:
 959                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
 960                 break;
 961         case OOO_LB_TC:
 962                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO);
 963                 break;
 964         default:
 965                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
 966                 break;
 967         }
 968
 969         p_ramrod->qm_pq_id = cpu_to_le16(pq_id);
 970
 971         switch (conn_type) {
 972         case QED_LL2_TYPE_FCOE:
 973                 p_ramrod->conn_type = PROTOCOLID_FCOE;
 974                 break;
 975         case QED_LL2_TYPE_ISCSI:
 976         case QED_LL2_TYPE_ISCSI_OOO:
 977                 p_ramrod->conn_type = PROTOCOLID_ISCSI;
 978                 break;
 979         case QED_LL2_TYPE_ROCE:
 980                 p_ramrod->conn_type = PROTOCOLID_ROCE;
 981                 break;
 982         default:
 983                 p_ramrod->conn_type = PROTOCOLID_ETH;
 984                 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type);
 985         }
 986
 987         p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
 988
 989         return qed_spq_post(p_hwfn, p_ent, NULL);
 990 }
 991
 992 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn,
 993                                     struct qed_ll2_info *p_ll2_conn)
 994 {
 995         struct core_rx_stop_ramrod_data *p_ramrod = NULL;
 996         struct qed_spq_entry *p_ent = NULL;
 997         struct qed_sp_init_data init_data;
 998         int rc = -EINVAL;
 999
1000         /* Get SPQ entry */
1001         memset(&init_data, 0, sizeof(init_data));
1002         init_data.cid = p_ll2_conn->cid;
1003         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1004         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1005
1006         rc = qed_sp_init_request(p_hwfn, &p_ent,
1007                                  CORE_RAMROD_RX_QUEUE_STOP,
1008                                  PROTOCOLID_CORE, &init_data);
1009         if (rc)
1010                 return rc;
1011
1012         p_ramrod = &p_ent->ramrod.core_rx_queue_stop;
1013
1014         p_ramrod->complete_event_flg = 1;
1015         p_ramrod->queue_id = p_ll2_conn->queue_id;
1016
1017         return qed_spq_post(p_hwfn, p_ent, NULL);
1018 }
1019
1020 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn,
1021                                     struct qed_ll2_info *p_ll2_conn)
1022 {
1023         struct qed_spq_entry *p_ent = NULL;
1024         struct qed_sp_init_data init_data;
1025         int rc = -EINVAL;
1026
1027         /* Get SPQ entry */
1028         memset(&init_data, 0, sizeof(init_data));
1029         init_data.cid = p_ll2_conn->cid;
1030         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1031         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1032
1033         rc = qed_sp_init_request(p_hwfn, &p_ent,
1034                                  CORE_RAMROD_TX_QUEUE_STOP,
1035                                  PROTOCOLID_CORE, &init_data);
1036         if (rc)
1037                 return rc;
1038
1039         return qed_spq_post(p_hwfn, p_ent, NULL);
1040 }
1041
1042 static int
1043 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
1044                               struct qed_ll2_info *p_ll2_info)
1045 {
1046         struct qed_ll2_rx_packet *p_descq;
1047         u32 capacity;
1048         int rc = 0;
1049
1050         if (!p_ll2_info->input.rx_num_desc)
1051                 goto out;
1052
1053         rc = qed_chain_alloc(p_hwfn->cdev,
1054                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1055                              QED_CHAIN_MODE_NEXT_PTR,
1056                              QED_CHAIN_CNT_TYPE_U16,
1057                              p_ll2_info->input.rx_num_desc,
1058                              sizeof(struct core_rx_bd),
1059                              &p_ll2_info->rx_queue.rxq_chain, NULL);
1060         if (rc) {
1061                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
1062                 goto out;
1063         }
1064
1065         capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
1066         p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet),
1067                           GFP_KERNEL);
1068         if (!p_descq) {
1069                 rc = -ENOMEM;
1070                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n");
1071                 goto out;
1072         }
1073         p_ll2_info->rx_queue.descq_array = p_descq;
1074
1075         rc = qed_chain_alloc(p_hwfn->cdev,
1076                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1077                              QED_CHAIN_MODE_PBL,
1078                              QED_CHAIN_CNT_TYPE_U16,
1079                              p_ll2_info->input.rx_num_desc,
1080                              sizeof(struct core_rx_fast_path_cqe),
1081                              &p_ll2_info->rx_queue.rcq_chain, NULL);
1082         if (rc) {
1083                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
1084                 goto out;
1085         }
1086
1087         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1088                    "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
1089                    p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc);
1090
1091 out:
1092         return rc;
1093 }
1094
1095 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
1096                                          struct qed_ll2_info *p_ll2_info)
1097 {
1098         struct qed_ll2_tx_packet *p_descq;
1099         u32 capacity;
1100         int rc = 0;
1101
1102         if (!p_ll2_info->input.tx_num_desc)
1103                 goto out;
1104
1105         rc = qed_chain_alloc(p_hwfn->cdev,
1106                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1107                              QED_CHAIN_MODE_PBL,
1108                              QED_CHAIN_CNT_TYPE_U16,
1109                              p_ll2_info->input.tx_num_desc,
1110                              sizeof(struct core_tx_bd),
1111                              &p_ll2_info->tx_queue.txq_chain, NULL);
1112         if (rc)
1113                 goto out;
1114
1115         capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
1116         p_descq = kcalloc(capacity, sizeof(struct qed_ll2_tx_packet),
1117                           GFP_KERNEL);
1118         if (!p_descq) {
1119                 rc = -ENOMEM;
1120                 goto out;
1121         }
1122         p_ll2_info->tx_queue.descq_array = p_descq;
1123
1124         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1125                    "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
1126                    p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc);
1127
1128 out:
1129         if (rc)
1130                 DP_NOTICE(p_hwfn,
1131                           "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
1132                           p_ll2_info->input.tx_num_desc);
1133         return rc;
1134 }
1135
1136 static int
1137 qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn,
1138                                struct qed_ll2_info *p_ll2_info, u16 mtu)
1139 {
1140         struct qed_ooo_buffer *p_buf = NULL;
1141         void *p_virt;
1142         u16 buf_idx;
1143         int rc = 0;
1144
1145         if (p_ll2_info->input.conn_type != QED_LL2_TYPE_ISCSI_OOO)
1146                 return rc;
1147
1148         /* Correct number of requested OOO buffers if needed */
1149         if (!p_ll2_info->input.rx_num_ooo_buffers) {
1150                 u16 num_desc = p_ll2_info->input.rx_num_desc;
1151
1152                 if (!num_desc)
1153                         return -EINVAL;
1154                 p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2;
1155         }
1156
1157         for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers;
1158              buf_idx++) {
1159                 p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL);
1160                 if (!p_buf) {
1161                         rc = -ENOMEM;
1162                         goto out;
1163                 }
1164
1165                 p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE;
1166                 p_buf->rx_buffer_size = (p_buf->rx_buffer_size +
1167                                          ETH_CACHE_LINE_SIZE - 1) &
1168                                         ~(ETH_CACHE_LINE_SIZE - 1);
1169                 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
1170                                             p_buf->rx_buffer_size,
1171                                             &p_buf->rx_buffer_phys_addr,
1172                                             GFP_KERNEL);
1173                 if (!p_virt) {
1174                         kfree(p_buf);
1175                         rc = -ENOMEM;
1176                         goto out;
1177                 }
1178
1179                 p_buf->rx_buffer_virt_addr = p_virt;
1180                 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf);
1181         }
1182
1183         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1184                    "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n",
1185                    p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size);
1186
1187 out:
1188         return rc;
1189 }
1190
1191 static int
1192 qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs)
1193 {
1194         if (!cbs || (!cbs->rx_comp_cb ||
1195                      !cbs->rx_release_cb ||
1196                      !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie))
1197                 return -EINVAL;
1198
1199         p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb;
1200         p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb;
1201         p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb;
1202         p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb;
1203         p_ll2_info->cbs.cookie = cbs->cookie;
1204
1205         return 0;
1206 }
1207
1208 static enum core_error_handle
1209 qed_ll2_get_error_choice(enum qed_ll2_error_handle err)
1210 {
1211         switch (err) {
1212         case QED_LL2_DROP_PACKET:
1213                 return LL2_DROP_PACKET;
1214         case QED_LL2_DO_NOTHING:
1215                 return LL2_DO_NOTHING;
1216         case QED_LL2_ASSERT:
1217                 return LL2_ASSERT;
1218         default:
1219                 return LL2_DO_NOTHING;
1220         }
1221 }
1222
1223 int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data)
1224 {
1225         struct qed_hwfn *p_hwfn = cxt;
1226         qed_int_comp_cb_t comp_rx_cb, comp_tx_cb;
1227         struct qed_ll2_info *p_ll2_info = NULL;
1228         u8 i, *p_tx_max;
1229         int rc;
1230
1231         if (!data->p_connection_handle || !p_hwfn->p_ll2_info)
1232                 return -EINVAL;
1233
1234         /* Find a free connection to be used */
1235         for (i = 0; (i < QED_MAX_NUM_OF_LL2_CONNECTIONS); i++) {
1236                 mutex_lock(&p_hwfn->p_ll2_info[i].mutex);
1237                 if (p_hwfn->p_ll2_info[i].b_active) {
1238                         mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1239                         continue;
1240                 }
1241
1242                 p_hwfn->p_ll2_info[i].b_active = true;
1243                 p_ll2_info = &p_hwfn->p_ll2_info[i];
1244                 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1245                 break;
1246         }
1247         if (!p_ll2_info)
1248                 return -EBUSY;
1249
1250         memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input));
1251
1252         p_ll2_info->tx_dest = (data->input.tx_dest == QED_LL2_TX_DEST_NW) ?
1253                               CORE_TX_DEST_NW : CORE_TX_DEST_LB;
1254
1255         /* Correct maximum number of Tx BDs */
1256         p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet;
1257         if (*p_tx_max == 0)
1258                 *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET;
1259         else
1260                 *p_tx_max = min_t(u8, *p_tx_max,
1261                                   CORE_LL2_TX_MAX_BDS_PER_PACKET);
1262
1263         rc = qed_ll2_set_cbs(p_ll2_info, data->cbs);
1264         if (rc) {
1265                 DP_NOTICE(p_hwfn, "Invalid callback functions\n");
1266                 goto q_allocate_fail;
1267         }
1268
1269         rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info);
1270         if (rc)
1271                 goto q_allocate_fail;
1272
1273         rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info);
1274         if (rc)
1275                 goto q_allocate_fail;
1276
1277         rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info,
1278                                             data->input.mtu);
1279         if (rc)
1280                 goto q_allocate_fail;
1281
1282         /* Register callbacks for the Rx/Tx queues */
1283         if (data->input.conn_type == QED_LL2_TYPE_ISCSI_OOO) {
1284                 comp_rx_cb = qed_ll2_lb_rxq_completion;
1285                 comp_tx_cb = qed_ll2_lb_txq_completion;
1286         } else {
1287                 comp_rx_cb = qed_ll2_rxq_completion;
1288                 comp_tx_cb = qed_ll2_txq_completion;
1289         }
1290
1291         if (data->input.rx_num_desc) {
1292                 qed_int_register_cb(p_hwfn, comp_rx_cb,
1293                                     &p_hwfn->p_ll2_info[i],
1294                                     &p_ll2_info->rx_queue.rx_sb_index,
1295                                     &p_ll2_info->rx_queue.p_fw_cons);
1296                 p_ll2_info->rx_queue.b_cb_registred = true;
1297         }
1298
1299         if (data->input.tx_num_desc) {
1300                 qed_int_register_cb(p_hwfn,
1301                                     comp_tx_cb,
1302                                     &p_hwfn->p_ll2_info[i],
1303                                     &p_ll2_info->tx_queue.tx_sb_index,
1304                                     &p_ll2_info->tx_queue.p_fw_cons);
1305                 p_ll2_info->tx_queue.b_cb_registred = true;
1306         }
1307
1308         *data->p_connection_handle = i;
1309         return rc;
1310
1311 q_allocate_fail:
1312         qed_ll2_release_connection(p_hwfn, i);
1313         return -ENOMEM;
1314 }
1315
1316 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn,
1317                                            struct qed_ll2_info *p_ll2_conn)
1318 {
1319         enum qed_ll2_error_handle error_input;
1320         enum core_error_handle error_mode;
1321         u8 action_on_error = 0;
1322
1323         if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
1324                 return 0;
1325
1326         DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0);
1327         error_input = p_ll2_conn->input.ai_err_packet_too_big;
1328         error_mode = qed_ll2_get_error_choice(error_input);
1329         SET_FIELD(action_on_error,
1330                   CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode);
1331         error_input = p_ll2_conn->input.ai_err_no_buf;
1332         error_mode = qed_ll2_get_error_choice(error_input);
1333         SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode);
1334
1335         return qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
1336 }
1337
1338 static void
1339 qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn,
1340                                  struct qed_ll2_info *p_ll2_conn)
1341 {
1342         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_ISCSI_OOO)
1343                 return;
1344
1345         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1346         qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
1347 }
1348
1349 int qed_ll2_establish_connection(void *cxt, u8 connection_handle)
1350 {
1351         struct qed_hwfn *p_hwfn = cxt;
1352         struct qed_ll2_info *p_ll2_conn;
1353         struct qed_ll2_rx_queue *p_rx;
1354         struct qed_ll2_tx_queue *p_tx;
1355         struct qed_ptt *p_ptt;
1356         int rc = -EINVAL;
1357         u32 i, capacity;
1358         u8 qid;
1359
1360         p_ptt = qed_ptt_acquire(p_hwfn);
1361         if (!p_ptt)
1362                 return -EAGAIN;
1363
1364         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1365         if (!p_ll2_conn) {
1366                 rc = -EINVAL;
1367                 goto out;
1368         }
1369
1370         p_rx = &p_ll2_conn->rx_queue;
1371         p_tx = &p_ll2_conn->tx_queue;
1372
1373         qed_chain_reset(&p_rx->rxq_chain);
1374         qed_chain_reset(&p_rx->rcq_chain);
1375         INIT_LIST_HEAD(&p_rx->active_descq);
1376         INIT_LIST_HEAD(&p_rx->free_descq);
1377         INIT_LIST_HEAD(&p_rx->posting_descq);
1378         spin_lock_init(&p_rx->lock);
1379         capacity = qed_chain_get_capacity(&p_rx->rxq_chain);
1380         for (i = 0; i < capacity; i++)
1381                 list_add_tail(&p_rx->descq_array[i].list_entry,
1382                               &p_rx->free_descq);
1383         *p_rx->p_fw_cons = 0;
1384
1385         qed_chain_reset(&p_tx->txq_chain);
1386         INIT_LIST_HEAD(&p_tx->active_descq);
1387         INIT_LIST_HEAD(&p_tx->free_descq);
1388         INIT_LIST_HEAD(&p_tx->sending_descq);
1389         spin_lock_init(&p_tx->lock);
1390         capacity = qed_chain_get_capacity(&p_tx->txq_chain);
1391         for (i = 0; i < capacity; i++)
1392                 list_add_tail(&p_tx->descq_array[i].list_entry,
1393                               &p_tx->free_descq);
1394         p_tx->cur_completing_bd_idx = 0;
1395         p_tx->bds_idx = 0;
1396         p_tx->b_completing_packet = false;
1397         p_tx->cur_send_packet = NULL;
1398         p_tx->cur_send_frag_num = 0;
1399         p_tx->cur_completing_frag_num = 0;
1400         *p_tx->p_fw_cons = 0;
1401
1402         rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
1403         if (rc)
1404                 goto out;
1405
1406         qid = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] + connection_handle;
1407         p_ll2_conn->queue_id = qid;
1408         p_ll2_conn->tx_stats_id = qid;
1409         p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview +
1410                                             GTT_BAR0_MAP_REG_TSDM_RAM +
1411                                             TSTORM_LL2_RX_PRODS_OFFSET(qid);
1412         p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells +
1413                                             qed_db_addr(p_ll2_conn->cid,
1414                                                         DQ_DEMS_LEGACY);
1415
1416         rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
1417         if (rc)
1418                 goto out;
1419
1420         rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
1421         if (rc)
1422                 goto out;
1423
1424         if (p_hwfn->hw_info.personality != QED_PCI_ETH_ROCE)
1425                 qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1);
1426
1427         qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn);
1428
1429         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1430                 qed_llh_add_protocol_filter(p_hwfn, p_ptt,
1431                                             0x8906, 0,
1432                                             QED_LLH_FILTER_ETHERTYPE);
1433                 qed_llh_add_protocol_filter(p_hwfn, p_ptt,
1434                                             0x8914, 0,
1435                                             QED_LLH_FILTER_ETHERTYPE);
1436         }
1437
1438 out:
1439         qed_ptt_release(p_hwfn, p_ptt);
1440         return rc;
1441 }
1442
1443 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn,
1444                                              struct qed_ll2_rx_queue *p_rx,
1445                                              struct qed_ll2_rx_packet *p_curp)
1446 {
1447         struct qed_ll2_rx_packet *p_posting_packet = NULL;
1448         struct core_ll2_rx_prod rx_prod = { 0, 0, 0 };
1449         bool b_notify_fw = false;
1450         u16 bd_prod, cq_prod;
1451
1452         /* This handles the flushing of already posted buffers */
1453         while (!list_empty(&p_rx->posting_descq)) {
1454                 p_posting_packet = list_first_entry(&p_rx->posting_descq,
1455                                                     struct qed_ll2_rx_packet,
1456                                                     list_entry);
1457                 list_move_tail(&p_posting_packet->list_entry,
1458                                &p_rx->active_descq);
1459                 b_notify_fw = true;
1460         }
1461
1462         /* This handles the supplied packet [if there is one] */
1463         if (p_curp) {
1464                 list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
1465                 b_notify_fw = true;
1466         }
1467
1468         if (!b_notify_fw)
1469                 return;
1470
1471         bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
1472         cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
1473         rx_prod.bd_prod = cpu_to_le16(bd_prod);
1474         rx_prod.cqe_prod = cpu_to_le16(cq_prod);
1475         DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
1476 }
1477
1478 int qed_ll2_post_rx_buffer(void *cxt,
1479                            u8 connection_handle,
1480                            dma_addr_t addr,
1481                            u16 buf_len, void *cookie, u8 notify_fw)
1482 {
1483         struct qed_hwfn *p_hwfn = cxt;
1484         struct core_rx_bd_with_buff_len *p_curb = NULL;
1485         struct qed_ll2_rx_packet *p_curp = NULL;
1486         struct qed_ll2_info *p_ll2_conn;
1487         struct qed_ll2_rx_queue *p_rx;
1488         unsigned long flags;
1489         void *p_data;
1490         int rc = 0;
1491
1492         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1493         if (!p_ll2_conn)
1494                 return -EINVAL;
1495         p_rx = &p_ll2_conn->rx_queue;
1496
1497         spin_lock_irqsave(&p_rx->lock, flags);
1498         if (!list_empty(&p_rx->free_descq))
1499                 p_curp = list_first_entry(&p_rx->free_descq,
1500                                           struct qed_ll2_rx_packet, list_entry);
1501         if (p_curp) {
1502                 if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
1503                     qed_chain_get_elem_left(&p_rx->rcq_chain)) {
1504                         p_data = qed_chain_produce(&p_rx->rxq_chain);
1505                         p_curb = (struct core_rx_bd_with_buff_len *)p_data;
1506                         qed_chain_produce(&p_rx->rcq_chain);
1507                 }
1508         }
1509
1510         /* If we're lacking entires, let's try to flush buffers to FW */
1511         if (!p_curp || !p_curb) {
1512                 rc = -EBUSY;
1513                 p_curp = NULL;
1514                 goto out_notify;
1515         }
1516
1517         /* We have an Rx packet we can fill */
1518         DMA_REGPAIR_LE(p_curb->addr, addr);
1519         p_curb->buff_length = cpu_to_le16(buf_len);
1520         p_curp->rx_buf_addr = addr;
1521         p_curp->cookie = cookie;
1522         p_curp->rxq_bd = p_curb;
1523         p_curp->buf_length = buf_len;
1524         list_del(&p_curp->list_entry);
1525
1526         /* Check if we only want to enqueue this packet without informing FW */
1527         if (!notify_fw) {
1528                 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
1529                 goto out;
1530         }
1531
1532 out_notify:
1533         qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
1534 out:
1535         spin_unlock_irqrestore(&p_rx->lock, flags);
1536         return rc;
1537 }
1538
1539 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
1540                                           struct qed_ll2_tx_queue *p_tx,
1541                                           struct qed_ll2_tx_packet *p_curp,
1542                                           struct qed_ll2_tx_pkt_info *pkt,
1543                                           u8 notify_fw)
1544 {
1545         list_del(&p_curp->list_entry);
1546         p_curp->cookie = pkt->cookie;
1547         p_curp->bd_used = pkt->num_of_bds;
1548         p_curp->notify_fw = notify_fw;
1549         p_tx->cur_send_packet = p_curp;
1550         p_tx->cur_send_frag_num = 0;
1551
1552         p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag;
1553         p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len;
1554         p_tx->cur_send_frag_num++;
1555 }
1556
1557 static void
1558 qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
1559                                  struct qed_ll2_info *p_ll2,
1560                                  struct qed_ll2_tx_packet *p_curp,
1561                                  struct qed_ll2_tx_pkt_info *pkt)
1562 {
1563         struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
1564         u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
1565         struct core_tx_bd *start_bd = NULL;
1566         enum core_roce_flavor_type roce_flavor;
1567         enum core_tx_dest tx_dest;
1568         u16 bd_data = 0, frag_idx;
1569
1570         roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE
1571                                                              : CORE_RROCE;
1572
1573         tx_dest = (pkt->tx_dest == QED_LL2_TX_DEST_NW) ? CORE_TX_DEST_NW
1574                                                        : CORE_TX_DEST_LB;
1575
1576         start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1577         start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan);
1578         SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W,
1579                   cpu_to_le16(pkt->l4_hdr_offset_w));
1580         SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest);
1581         bd_data |= pkt->bd_flags;
1582         SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1);
1583         SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds);
1584         SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor);
1585         start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data);
1586         DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag);
1587         start_bd->nbytes = cpu_to_le16(pkt->first_frag_len);
1588
1589         DP_VERBOSE(p_hwfn,
1590                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1591                    "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Tx Producer at [0x%04x] - set with a %04x bytes %02x BDs buffer at %08x:%08x\n",
1592                    p_ll2->queue_id,
1593                    p_ll2->cid,
1594                    p_ll2->input.conn_type,
1595                    prod_idx,
1596                    pkt->first_frag_len,
1597                    pkt->num_of_bds,
1598                    le32_to_cpu(start_bd->addr.hi),
1599                    le32_to_cpu(start_bd->addr.lo));
1600
1601         if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds)
1602                 return;
1603
1604         /* Need to provide the packet with additional BDs for frags */
1605         for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
1606              frag_idx < pkt->num_of_bds; frag_idx++) {
1607                 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
1608
1609                 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1610                 (*p_bd)->bd_data.as_bitfield = 0;
1611                 (*p_bd)->bitfield1 = 0;
1612                 p_curp->bds_set[frag_idx].tx_frag = 0;
1613                 p_curp->bds_set[frag_idx].frag_len = 0;
1614         }
1615 }
1616
1617 /* This should be called while the Txq spinlock is being held */
1618 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
1619                                      struct qed_ll2_info *p_ll2_conn)
1620 {
1621         bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
1622         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1623         struct qed_ll2_tx_packet *p_pkt = NULL;
1624         struct core_db_data db_msg = { 0, 0, 0 };
1625         u16 bd_prod;
1626
1627         /* If there are missing BDs, don't do anything now */
1628         if (p_ll2_conn->tx_queue.cur_send_frag_num !=
1629             p_ll2_conn->tx_queue.cur_send_packet->bd_used)
1630                 return;
1631
1632         /* Push the current packet to the list and clean after it */
1633         list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
1634                       &p_ll2_conn->tx_queue.sending_descq);
1635         p_ll2_conn->tx_queue.cur_send_packet = NULL;
1636         p_ll2_conn->tx_queue.cur_send_frag_num = 0;
1637
1638         /* Notify FW of packet only if requested to */
1639         if (!b_notify)
1640                 return;
1641
1642         bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
1643
1644         while (!list_empty(&p_tx->sending_descq)) {
1645                 p_pkt = list_first_entry(&p_tx->sending_descq,
1646                                          struct qed_ll2_tx_packet, list_entry);
1647                 if (!p_pkt)
1648                         break;
1649
1650                 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq);
1651         }
1652
1653         SET_FIELD(db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
1654         SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
1655         SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
1656                   DQ_XCM_CORE_TX_BD_PROD_CMD);
1657         db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
1658         db_msg.spq_prod = cpu_to_le16(bd_prod);
1659
1660         /* Make sure the BDs data is updated before ringing the doorbell */
1661         wmb();
1662
1663         DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&db_msg));
1664
1665         DP_VERBOSE(p_hwfn,
1666                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1667                    "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
1668                    p_ll2_conn->queue_id,
1669                    p_ll2_conn->cid,
1670                    p_ll2_conn->input.conn_type, db_msg.spq_prod);
1671 }
1672
1673 int qed_ll2_prepare_tx_packet(void *cxt,
1674                               u8 connection_handle,
1675                               struct qed_ll2_tx_pkt_info *pkt,
1676                               bool notify_fw)
1677 {
1678         struct qed_hwfn *p_hwfn = cxt;
1679         struct qed_ll2_tx_packet *p_curp = NULL;
1680         struct qed_ll2_info *p_ll2_conn = NULL;
1681         struct qed_ll2_tx_queue *p_tx;
1682         struct qed_chain *p_tx_chain;
1683         unsigned long flags;
1684         int rc = 0;
1685
1686         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1687         if (!p_ll2_conn)
1688                 return -EINVAL;
1689         p_tx = &p_ll2_conn->tx_queue;
1690         p_tx_chain = &p_tx->txq_chain;
1691
1692         if (pkt->num_of_bds > CORE_LL2_TX_MAX_BDS_PER_PACKET)
1693                 return -EIO;
1694
1695         spin_lock_irqsave(&p_tx->lock, flags);
1696         if (p_tx->cur_send_packet) {
1697                 rc = -EEXIST;
1698                 goto out;
1699         }
1700
1701         /* Get entry, but only if we have tx elements for it */
1702         if (!list_empty(&p_tx->free_descq))
1703                 p_curp = list_first_entry(&p_tx->free_descq,
1704                                           struct qed_ll2_tx_packet, list_entry);
1705         if (p_curp && qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds)
1706                 p_curp = NULL;
1707
1708         if (!p_curp) {
1709                 rc = -EBUSY;
1710                 goto out;
1711         }
1712
1713         /* Prepare packet and BD, and perhaps send a doorbell to FW */
1714         qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw);
1715
1716         qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt);
1717
1718         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1719
1720 out:
1721         spin_unlock_irqrestore(&p_tx->lock, flags);
1722         return rc;
1723 }
1724
1725 int qed_ll2_set_fragment_of_tx_packet(void *cxt,
1726                                       u8 connection_handle,
1727                                       dma_addr_t addr, u16 nbytes)
1728 {
1729         struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
1730         struct qed_hwfn *p_hwfn = cxt;
1731         struct qed_ll2_info *p_ll2_conn = NULL;
1732         u16 cur_send_frag_num = 0;
1733         struct core_tx_bd *p_bd;
1734         unsigned long flags;
1735
1736         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1737         if (!p_ll2_conn)
1738                 return -EINVAL;
1739
1740         if (!p_ll2_conn->tx_queue.cur_send_packet)
1741                 return -EINVAL;
1742
1743         p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
1744         cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
1745
1746         if (cur_send_frag_num >= p_cur_send_packet->bd_used)
1747                 return -EINVAL;
1748
1749         /* Fill the BD information, and possibly notify FW */
1750         p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
1751         DMA_REGPAIR_LE(p_bd->addr, addr);
1752         p_bd->nbytes = cpu_to_le16(nbytes);
1753         p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
1754         p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
1755
1756         p_ll2_conn->tx_queue.cur_send_frag_num++;
1757
1758         spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
1759         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1760         spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
1761
1762         return 0;
1763 }
1764
1765 int qed_ll2_terminate_connection(void *cxt, u8 connection_handle)
1766 {
1767         struct qed_hwfn *p_hwfn = cxt;
1768         struct qed_ll2_info *p_ll2_conn = NULL;
1769         int rc = -EINVAL;
1770         struct qed_ptt *p_ptt;
1771
1772         p_ptt = qed_ptt_acquire(p_hwfn);
1773         if (!p_ptt)
1774                 return -EAGAIN;
1775
1776         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1777         if (!p_ll2_conn) {
1778                 rc = -EINVAL;
1779                 goto out;
1780         }
1781
1782         /* Stop Tx & Rx of connection, if needed */
1783         if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
1784                 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
1785                 if (rc)
1786                         goto out;
1787                 qed_ll2_txq_flush(p_hwfn, connection_handle);
1788         }
1789
1790         if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
1791                 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
1792                 if (rc)
1793                         goto out;
1794                 qed_ll2_rxq_flush(p_hwfn, connection_handle);
1795         }
1796
1797         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_ISCSI_OOO)
1798                 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1799
1800         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1801                 qed_llh_remove_protocol_filter(p_hwfn, p_ptt,
1802                                                0x8906, 0,
1803                                                QED_LLH_FILTER_ETHERTYPE);
1804                 qed_llh_remove_protocol_filter(p_hwfn, p_ptt,
1805                                                0x8914, 0,
1806                                                QED_LLH_FILTER_ETHERTYPE);
1807         }
1808
1809 out:
1810         qed_ptt_release(p_hwfn, p_ptt);
1811         return rc;
1812 }
1813
1814 static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn,
1815                                            struct qed_ll2_info *p_ll2_conn)
1816 {
1817         struct qed_ooo_buffer *p_buffer;
1818
1819         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_ISCSI_OOO)
1820                 return;
1821
1822         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1823         while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
1824                                                    p_hwfn->p_ooo_info))) {
1825                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
1826                                   p_buffer->rx_buffer_size,
1827                                   p_buffer->rx_buffer_virt_addr,
1828                                   p_buffer->rx_buffer_phys_addr);
1829                 kfree(p_buffer);
1830         }
1831 }
1832
1833 void qed_ll2_release_connection(void *cxt, u8 connection_handle)
1834 {
1835         struct qed_hwfn *p_hwfn = cxt;
1836         struct qed_ll2_info *p_ll2_conn = NULL;
1837
1838         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1839         if (!p_ll2_conn)
1840                 return;
1841
1842         if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
1843                 p_ll2_conn->rx_queue.b_cb_registred = false;
1844                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
1845         }
1846
1847         if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
1848                 p_ll2_conn->tx_queue.b_cb_registred = false;
1849                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
1850         }
1851
1852         kfree(p_ll2_conn->tx_queue.descq_array);
1853         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
1854
1855         kfree(p_ll2_conn->rx_queue.descq_array);
1856         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
1857         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
1858
1859         qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
1860
1861         qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn);
1862
1863         mutex_lock(&p_ll2_conn->mutex);
1864         p_ll2_conn->b_active = false;
1865         mutex_unlock(&p_ll2_conn->mutex);
1866 }
1867
1868 int qed_ll2_alloc(struct qed_hwfn *p_hwfn)
1869 {
1870         struct qed_ll2_info *p_ll2_connections;
1871         u8 i;
1872
1873         /* Allocate LL2's set struct */
1874         p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
1875                                     sizeof(struct qed_ll2_info), GFP_KERNEL);
1876         if (!p_ll2_connections) {
1877                 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
1878                 return -ENOMEM;
1879         }
1880
1881         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
1882                 p_ll2_connections[i].my_id = i;
1883
1884         p_hwfn->p_ll2_info = p_ll2_connections;
1885         return 0;
1886 }
1887
1888 void qed_ll2_setup(struct qed_hwfn *p_hwfn)
1889 {
1890         int i;
1891
1892         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
1893                 mutex_init(&p_hwfn->p_ll2_info[i].mutex);
1894 }
1895
1896 void qed_ll2_free(struct qed_hwfn *p_hwfn)
1897 {
1898         if (!p_hwfn->p_ll2_info)
1899                 return;
1900
1901         kfree(p_hwfn->p_ll2_info);
1902         p_hwfn->p_ll2_info = NULL;
1903 }
1904
1905 static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn,
1906                                     struct qed_ptt *p_ptt,
1907                                     struct qed_ll2_stats *p_stats)
1908 {
1909         struct core_ll2_port_stats port_stats;
1910
1911         memset(&port_stats, 0, sizeof(port_stats));
1912         qed_memcpy_from(p_hwfn, p_ptt, &port_stats,
1913                         BAR0_MAP_REG_TSDM_RAM +
1914                         TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)),
1915                         sizeof(port_stats));
1916
1917         p_stats->gsi_invalid_hdr = HILO_64_REGPAIR(port_stats.gsi_invalid_hdr);
1918         p_stats->gsi_invalid_pkt_length =
1919             HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length);
1920         p_stats->gsi_unsupported_pkt_typ =
1921             HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ);
1922         p_stats->gsi_crcchksm_error =
1923             HILO_64_REGPAIR(port_stats.gsi_crcchksm_error);
1924 }
1925
1926 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,
1927                                 struct qed_ptt *p_ptt,
1928                                 struct qed_ll2_info *p_ll2_conn,
1929                                 struct qed_ll2_stats *p_stats)
1930 {
1931         struct core_ll2_tstorm_per_queue_stat tstats;
1932         u8 qid = p_ll2_conn->queue_id;
1933         u32 tstats_addr;
1934
1935         memset(&tstats, 0, sizeof(tstats));
1936         tstats_addr = BAR0_MAP_REG_TSDM_RAM +
1937                       CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
1938         qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
1939
1940         p_stats->packet_too_big_discard =
1941                         HILO_64_REGPAIR(tstats.packet_too_big_discard);
1942         p_stats->no_buff_discard = HILO_64_REGPAIR(tstats.no_buff_discard);
1943 }
1944
1945 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
1946                                 struct qed_ptt *p_ptt,
1947                                 struct qed_ll2_info *p_ll2_conn,
1948                                 struct qed_ll2_stats *p_stats)
1949 {
1950         struct core_ll2_ustorm_per_queue_stat ustats;
1951         u8 qid = p_ll2_conn->queue_id;
1952         u32 ustats_addr;
1953
1954         memset(&ustats, 0, sizeof(ustats));
1955         ustats_addr = BAR0_MAP_REG_USDM_RAM +
1956                       CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
1957         qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
1958
1959         p_stats->rcv_ucast_bytes = HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
1960         p_stats->rcv_mcast_bytes = HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
1961         p_stats->rcv_bcast_bytes = HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
1962         p_stats->rcv_ucast_pkts = HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
1963         p_stats->rcv_mcast_pkts = HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
1964         p_stats->rcv_bcast_pkts = HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
1965 }
1966
1967 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
1968                                 struct qed_ptt *p_ptt,
1969                                 struct qed_ll2_info *p_ll2_conn,
1970                                 struct qed_ll2_stats *p_stats)
1971 {
1972         struct core_ll2_pstorm_per_queue_stat pstats;
1973         u8 stats_id = p_ll2_conn->tx_stats_id;
1974         u32 pstats_addr;
1975
1976         memset(&pstats, 0, sizeof(pstats));
1977         pstats_addr = BAR0_MAP_REG_PSDM_RAM +
1978                       CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
1979         qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
1980
1981         p_stats->sent_ucast_bytes = HILO_64_REGPAIR(pstats.sent_ucast_bytes);
1982         p_stats->sent_mcast_bytes = HILO_64_REGPAIR(pstats.sent_mcast_bytes);
1983         p_stats->sent_bcast_bytes = HILO_64_REGPAIR(pstats.sent_bcast_bytes);
1984         p_stats->sent_ucast_pkts = HILO_64_REGPAIR(pstats.sent_ucast_pkts);
1985         p_stats->sent_mcast_pkts = HILO_64_REGPAIR(pstats.sent_mcast_pkts);
1986         p_stats->sent_bcast_pkts = HILO_64_REGPAIR(pstats.sent_bcast_pkts);
1987 }
1988
1989 int qed_ll2_get_stats(void *cxt,
1990                       u8 connection_handle, struct qed_ll2_stats *p_stats)
1991 {
1992         struct qed_hwfn *p_hwfn = cxt;
1993         struct qed_ll2_info *p_ll2_conn = NULL;
1994         struct qed_ptt *p_ptt;
1995
1996         memset(p_stats, 0, sizeof(*p_stats));
1997
1998         if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
1999             !p_hwfn->p_ll2_info)
2000                 return -EINVAL;
2001
2002         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
2003
2004         p_ptt = qed_ptt_acquire(p_hwfn);
2005         if (!p_ptt) {
2006                 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
2007                 return -EINVAL;
2008         }
2009
2010         if (p_ll2_conn->input.gsi_enable)
2011                 _qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats);
2012         _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2013         _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2014         if (p_ll2_conn->tx_stats_en)
2015                 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2016
2017         qed_ptt_release(p_hwfn, p_ptt);
2018         return 0;
2019 }
2020
2021 static void qed_ll2b_release_rx_packet(void *cxt,
2022                                        u8 connection_handle,
2023                                        void *cookie,
2024                                        dma_addr_t rx_buf_addr,
2025                                        bool b_last_packet)
2026 {
2027         struct qed_hwfn *p_hwfn = cxt;
2028
2029         qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie);
2030 }
2031
2032 static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
2033                                     const struct qed_ll2_cb_ops *ops,
2034                                     void *cookie)
2035 {
2036         cdev->ll2->cbs = ops;
2037         cdev->ll2->cb_cookie = cookie;
2038 }
2039
2040 struct qed_ll2_cbs ll2_cbs = {
2041         .rx_comp_cb = &qed_ll2b_complete_rx_packet,
2042         .rx_release_cb = &qed_ll2b_release_rx_packet,
2043         .tx_comp_cb = &qed_ll2b_complete_tx_packet,
2044         .tx_release_cb = &qed_ll2b_complete_tx_packet,
2045 };
2046
2047 static void qed_ll2_set_conn_data(struct qed_dev *cdev,
2048                                   struct qed_ll2_acquire_data *data,
2049                                   struct qed_ll2_params *params,
2050                                   enum qed_ll2_conn_type conn_type,
2051                                   u8 *handle, bool lb)
2052 {
2053         memset(data, 0, sizeof(*data));
2054
2055         data->input.conn_type = conn_type;
2056         data->input.mtu = params->mtu;
2057         data->input.rx_num_desc = QED_LL2_RX_SIZE;
2058         data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets;
2059         data->input.rx_vlan_removal_en = params->rx_vlan_stripping;
2060         data->input.tx_num_desc = QED_LL2_TX_SIZE;
2061         data->p_connection_handle = handle;
2062         data->cbs = &ll2_cbs;
2063         ll2_cbs.cookie = QED_LEADING_HWFN(cdev);
2064
2065         if (lb) {
2066                 data->input.tx_tc = OOO_LB_TC;
2067                 data->input.tx_dest = QED_LL2_TX_DEST_LB;
2068         } else {
2069                 data->input.tx_tc = 0;
2070                 data->input.tx_dest = QED_LL2_TX_DEST_NW;
2071         }
2072 }
2073
2074 static int qed_ll2_start_ooo(struct qed_dev *cdev,
2075                              struct qed_ll2_params *params)
2076 {
2077         struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
2078         u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
2079         struct qed_ll2_acquire_data data;
2080         int rc;
2081
2082         qed_ll2_set_conn_data(cdev, &data, params,
2083                               QED_LL2_TYPE_ISCSI_OOO, handle, true);
2084
2085         rc = qed_ll2_acquire_connection(hwfn, &data);
2086         if (rc) {
2087                 DP_INFO(cdev, "Failed to acquire LL2 OOO connection\n");
2088                 goto out;
2089         }
2090
2091         rc = qed_ll2_establish_connection(hwfn, *handle);
2092         if (rc) {
2093                 DP_INFO(cdev, "Failed to establist LL2 OOO connection\n");
2094                 goto fail;
2095         }
2096
2097         return 0;
2098
2099 fail:
2100         qed_ll2_release_connection(hwfn, *handle);
2101 out:
2102         *handle = QED_LL2_UNUSED_HANDLE;
2103         return rc;
2104 }
2105
2106 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
2107 {
2108         struct qed_ll2_buffer *buffer, *tmp_buffer;
2109         enum qed_ll2_conn_type conn_type;
2110         struct qed_ll2_acquire_data data;
2111         struct qed_ptt *p_ptt;
2112         int rc, i;
2113
2114
2115         /* Initialize LL2 locks & lists */
2116         INIT_LIST_HEAD(&cdev->ll2->list);
2117         spin_lock_init(&cdev->ll2->lock);
2118         cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
2119                              L1_CACHE_BYTES + params->mtu;
2120
2121         /*Allocate memory for LL2 */
2122         DP_INFO(cdev, "Allocating LL2 buffers of size %08x bytes\n",
2123                 cdev->ll2->rx_size);
2124         for (i = 0; i < QED_LL2_RX_SIZE; i++) {
2125                 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2126                 if (!buffer) {
2127                         DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
2128                         goto fail;
2129                 }
2130
2131                 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
2132                                           &buffer->phys_addr);
2133                 if (rc) {
2134                         kfree(buffer);
2135                         goto fail;
2136                 }
2137
2138                 list_add_tail(&buffer->list, &cdev->ll2->list);
2139         }
2140
2141         switch (QED_LEADING_HWFN(cdev)->hw_info.personality) {
2142         case QED_PCI_FCOE:
2143                 conn_type = QED_LL2_TYPE_FCOE;
2144                 break;
2145         case QED_PCI_ISCSI:
2146                 conn_type = QED_LL2_TYPE_ISCSI;
2147                 break;
2148         case QED_PCI_ETH_ROCE:
2149                 conn_type = QED_LL2_TYPE_ROCE;
2150                 break;
2151         default:
2152                 conn_type = QED_LL2_TYPE_TEST;
2153         }
2154
2155         qed_ll2_set_conn_data(cdev, &data, params, conn_type,
2156                               &cdev->ll2->handle, false);
2157
2158         rc = qed_ll2_acquire_connection(QED_LEADING_HWFN(cdev), &data);
2159         if (rc) {
2160                 DP_INFO(cdev, "Failed to acquire LL2 connection\n");
2161                 goto fail;
2162         }
2163
2164         rc = qed_ll2_establish_connection(QED_LEADING_HWFN(cdev),
2165                                           cdev->ll2->handle);
2166         if (rc) {
2167                 DP_INFO(cdev, "Failed to establish LL2 connection\n");
2168                 goto release_fail;
2169         }
2170
2171         /* Post all Rx buffers to FW */
2172         spin_lock_bh(&cdev->ll2->lock);
2173         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) {
2174                 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev),
2175                                             cdev->ll2->handle,
2176                                             buffer->phys_addr, 0, buffer, 1);
2177                 if (rc) {
2178                         DP_INFO(cdev,
2179                                 "Failed to post an Rx buffer; Deleting it\n");
2180                         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
2181                                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
2182                         kfree(buffer->data);
2183                         list_del(&buffer->list);
2184                         kfree(buffer);
2185                 } else {
2186                         cdev->ll2->rx_cnt++;
2187                 }
2188         }
2189         spin_unlock_bh(&cdev->ll2->lock);
2190
2191         if (!cdev->ll2->rx_cnt) {
2192                 DP_INFO(cdev, "Failed passing even a single Rx buffer\n");
2193                 goto release_terminate;
2194         }
2195
2196         if (!is_valid_ether_addr(params->ll2_mac_address)) {
2197                 DP_INFO(cdev, "Invalid Ethernet address\n");
2198                 goto release_terminate;
2199         }
2200
2201         if (cdev->hwfns[0].hw_info.personality == QED_PCI_ISCSI &&
2202             cdev->hwfns[0].pf_params.iscsi_pf_params.ooo_enable) {
2203                 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n");
2204                 rc = qed_ll2_start_ooo(cdev, params);
2205                 if (rc) {
2206                         DP_INFO(cdev,
2207                                 "Failed to initialize the OOO LL2 queue\n");
2208                         goto release_terminate;
2209                 }
2210         }
2211
2212         p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
2213         if (!p_ptt) {
2214                 DP_INFO(cdev, "Failed to acquire PTT\n");
2215                 goto release_terminate;
2216         }
2217
2218         rc = qed_llh_add_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
2219                                     params->ll2_mac_address);
2220         qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
2221         if (rc) {
2222                 DP_ERR(cdev, "Failed to allocate LLH filter\n");
2223                 goto release_terminate_all;
2224         }
2225
2226         ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
2227         return 0;
2228
2229 release_terminate_all:
2230
2231 release_terminate:
2232         qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2233 release_fail:
2234         qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2235 fail:
2236         qed_ll2_kill_buffers(cdev);
2237         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2238         return -EINVAL;
2239 }
2240
2241 static int qed_ll2_stop(struct qed_dev *cdev)
2242 {
2243         struct qed_ptt *p_ptt;
2244         int rc;
2245
2246         if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
2247                 return 0;
2248
2249         p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
2250         if (!p_ptt) {
2251                 DP_INFO(cdev, "Failed to acquire PTT\n");
2252                 goto fail;
2253         }
2254
2255         qed_llh_remove_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
2256                                   cdev->ll2_mac_address);
2257         qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
2258         eth_zero_addr(cdev->ll2_mac_address);
2259
2260         if (cdev->hwfns[0].hw_info.personality == QED_PCI_ISCSI &&
2261             cdev->hwfns[0].pf_params.iscsi_pf_params.ooo_enable)
2262                 qed_ll2_stop_ooo(cdev);
2263
2264         rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev),
2265                                           cdev->ll2->handle);
2266         if (rc)
2267                 DP_INFO(cdev, "Failed to terminate LL2 connection\n");
2268
2269         qed_ll2_kill_buffers(cdev);
2270
2271         qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2272         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2273
2274         return rc;
2275 fail:
2276         return -EINVAL;
2277 }
2278
2279 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb)
2280 {
2281         struct qed_ll2_tx_pkt_info pkt;
2282         const skb_frag_t *frag;
2283         int rc = -EINVAL, i;
2284         dma_addr_t mapping;
2285         u16 vlan = 0;
2286         u8 flags = 0;
2287
2288         if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
2289                 DP_INFO(cdev, "Cannot transmit a checksumed packet\n");
2290                 return -EINVAL;
2291         }
2292
2293         if (1 + skb_shinfo(skb)->nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) {
2294                 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
2295                        1 + skb_shinfo(skb)->nr_frags);
2296                 return -EINVAL;
2297         }
2298
2299         mapping = dma_map_single(&cdev->pdev->dev, skb->data,
2300                                  skb->len, DMA_TO_DEVICE);
2301         if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2302                 DP_NOTICE(cdev, "SKB mapping failed\n");
2303                 return -EINVAL;
2304         }
2305
2306         /* Request HW to calculate IP csum */
2307         if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
2308               ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
2309                 flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT);
2310
2311         if (skb_vlan_tag_present(skb)) {
2312                 vlan = skb_vlan_tag_get(skb);
2313                 flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT);
2314         }
2315
2316         memset(&pkt, 0, sizeof(pkt));
2317         pkt.num_of_bds = 1 + skb_shinfo(skb)->nr_frags;
2318         pkt.vlan = vlan;
2319         pkt.bd_flags = flags;
2320         pkt.tx_dest = QED_LL2_TX_DEST_NW;
2321         pkt.first_frag = mapping;
2322         pkt.first_frag_len = skb->len;
2323         pkt.cookie = skb;
2324
2325         rc = qed_ll2_prepare_tx_packet(&cdev->hwfns[0], cdev->ll2->handle,
2326                                        &pkt, 1);
2327         if (rc)
2328                 goto err;
2329
2330         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
2331                 frag = &skb_shinfo(skb)->frags[i];
2332
2333                 mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0,
2334                                            skb_frag_size(frag), DMA_TO_DEVICE);
2335
2336                 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2337                         DP_NOTICE(cdev,
2338                                   "Unable to map frag - dropping packet\n");
2339                         goto err;
2340                 }
2341
2342                 rc = qed_ll2_set_fragment_of_tx_packet(QED_LEADING_HWFN(cdev),
2343                                                        cdev->ll2->handle,
2344                                                        mapping,
2345                                                        skb_frag_size(frag));
2346
2347                 /* if failed not much to do here, partial packet has been posted
2348                  * we can't free memory, will need to wait for completion.
2349                  */
2350                 if (rc)
2351                         goto err2;
2352         }
2353
2354         return 0;
2355
2356 err:
2357         dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE);
2358
2359 err2:
2360         return rc;
2361 }
2362
2363 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats)
2364 {
2365         if (!cdev->ll2)
2366                 return -EINVAL;
2367
2368         return qed_ll2_get_stats(QED_LEADING_HWFN(cdev),
2369                                  cdev->ll2->handle, stats);
2370 }
2371
2372 const struct qed_ll2_ops qed_ll2_ops_pass = {
2373         .start = &qed_ll2_start,
2374         .stop = &qed_ll2_stop,
2375         .start_xmit = &qed_ll2_start_xmit,
2376         .register_cb_ops = &qed_ll2_register_cb_ops,
2377         .get_stats = &qed_ll2_stats,
2378 };
2379
2380 int qed_ll2_alloc_if(struct qed_dev *cdev)
2381 {
2382         cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL);
2383         return cdev->ll2 ? 0 : -ENOMEM;
2384 }
2385
2386 void qed_ll2_dealloc_if(struct qed_dev *cdev)
2387 {
2388         kfree(cdev->ll2);
2389         cdev->ll2 = NULL;
2390 }