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_rdma.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                 DP_INFO(cdev, "Failed to build SKB\n");
 205                 kfree(buffer->data);
 206                 goto out_post1;
 207         }
 208
 209         data->u.placement_offset += NET_SKB_PAD;
 210         skb_reserve(skb, data->u.placement_offset);
 211         skb_put(skb, data->length.packet_length);
 212         skb_checksum_none_assert(skb);
 213
 214         /* Get parital ethernet information instead of eth_type_trans(),
 215          * Since we don't have an associated net_device.
 216          */
 217         skb_reset_mac_header(skb);
 218         skb->protocol = eth_hdr(skb)->h_proto;
 219
 220         /* Pass SKB onward */
 221         if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) {
 222                 if (data->vlan)
 223                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 224                                                data->vlan);
 225                 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb,
 226                                       data->opaque_data_0,
 227                                       data->opaque_data_1);
 228         } else {
 229                 DP_VERBOSE(p_hwfn, (NETIF_MSG_RX_STATUS | NETIF_MSG_PKTDATA |
 230                                     QED_MSG_LL2 | QED_MSG_STORAGE),
 231                            "Dropping the packet\n");
 232                 kfree(buffer->data);
 233         }
 234
 235 out_post1:
 236         /* Update Buffer information and update FW producer */
 237         buffer->data = new_data;
 238         buffer->phys_addr = new_phys_addr;
 239
 240 out_post:
 241         rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), cdev->ll2->handle,
 242                                     buffer->phys_addr, 0,  buffer, 1);
 243
 244         if (rc)
 245                 qed_ll2_dealloc_buffer(cdev, buffer);
 246 }
 247
 248 static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 249                                                     u8 connection_handle,
 250                                                     bool b_lock,
 251                                                     bool b_only_active)
 252 {
 253         struct qed_ll2_info *p_ll2_conn, *p_ret = NULL;
 254
 255         if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS)
 256                 return NULL;
 257
 258         if (!p_hwfn->p_ll2_info)
 259                 return NULL;
 260
 261         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
 262
 263         if (b_only_active) {
 264                 if (b_lock)
 265                         mutex_lock(&p_ll2_conn->mutex);
 266                 if (p_ll2_conn->b_active)
 267                         p_ret = p_ll2_conn;
 268                 if (b_lock)
 269                         mutex_unlock(&p_ll2_conn->mutex);
 270         } else {
 271                 p_ret = p_ll2_conn;
 272         }
 273
 274         return p_ret;
 275 }
 276
 277 static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 278                                                   u8 connection_handle)
 279 {
 280         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true);
 281 }
 282
 283 static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn,
 284                                                        u8 connection_handle)
 285 {
 286         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true);
 287 }
 288
 289 static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn
 290                                                            *p_hwfn,
 291                                                            u8 connection_handle)
 292 {
 293         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false);
 294 }
 295
 296 static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 297 {
 298         bool b_last_packet = false, b_last_frag = false;
 299         struct qed_ll2_tx_packet *p_pkt = NULL;
 300         struct qed_ll2_info *p_ll2_conn;
 301         struct qed_ll2_tx_queue *p_tx;
 302         dma_addr_t tx_frag;
 303
 304         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 305         if (!p_ll2_conn)
 306                 return;
 307
 308         p_tx = &p_ll2_conn->tx_queue;
 309
 310         while (!list_empty(&p_tx->active_descq)) {
 311                 p_pkt = list_first_entry(&p_tx->active_descq,
 312                                          struct qed_ll2_tx_packet, list_entry);
 313                 if (!p_pkt)
 314                         break;
 315
 316                 list_del(&p_pkt->list_entry);
 317                 b_last_packet = list_empty(&p_tx->active_descq);
 318                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 319                 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
 320                         struct qed_ooo_buffer *p_buffer;
 321
 322                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 323                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 324                                                 p_buffer);
 325                 } else {
 326                         p_tx->cur_completing_packet = *p_pkt;
 327                         p_tx->cur_completing_bd_idx = 1;
 328                         b_last_frag =
 329                                 p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 330                         tx_frag = p_pkt->bds_set[0].tx_frag;
 331                         p_ll2_conn->cbs.tx_release_cb(p_ll2_conn->cbs.cookie,
 332                                                       p_ll2_conn->my_id,
 333                                                       p_pkt->cookie,
 334                                                       tx_frag,
 335                                                       b_last_frag,
 336                                                       b_last_packet);
 337                 }
 338         }
 339 }
 340
 341 static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 342 {
 343         struct qed_ll2_info *p_ll2_conn = p_cookie;
 344         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 345         u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0;
 346         struct qed_ll2_tx_packet *p_pkt;
 347         bool b_last_frag = false;
 348         unsigned long flags;
 349         int rc = -EINVAL;
 350
 351         spin_lock_irqsave(&p_tx->lock, flags);
 352         if (p_tx->b_completing_packet) {
 353                 rc = -EBUSY;
 354                 goto out;
 355         }
 356
 357         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 358         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 359         while (num_bds) {
 360                 if (list_empty(&p_tx->active_descq))
 361                         goto out;
 362
 363                 p_pkt = list_first_entry(&p_tx->active_descq,
 364                                          struct qed_ll2_tx_packet, list_entry);
 365                 if (!p_pkt)
 366                         goto out;
 367
 368                 p_tx->b_completing_packet = true;
 369                 p_tx->cur_completing_packet = *p_pkt;
 370                 num_bds_in_packet = p_pkt->bd_used;
 371                 list_del(&p_pkt->list_entry);
 372
 373                 if (num_bds < num_bds_in_packet) {
 374                         DP_NOTICE(p_hwfn,
 375                                   "Rest of BDs does not cover whole packet\n");
 376                         goto out;
 377                 }
 378
 379                 num_bds -= num_bds_in_packet;
 380                 p_tx->bds_idx += num_bds_in_packet;
 381                 while (num_bds_in_packet--)
 382                         qed_chain_consume(&p_tx->txq_chain);
 383
 384                 p_tx->cur_completing_bd_idx = 1;
 385                 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 386                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 387
 388                 spin_unlock_irqrestore(&p_tx->lock, flags);
 389
 390                 p_ll2_conn->cbs.tx_comp_cb(p_ll2_conn->cbs.cookie,
 391                                            p_ll2_conn->my_id,
 392                                            p_pkt->cookie,
 393                                            p_pkt->bds_set[0].tx_frag,
 394                                            b_last_frag, !num_bds);
 395
 396                 spin_lock_irqsave(&p_tx->lock, flags);
 397         }
 398
 399         p_tx->b_completing_packet = false;
 400         rc = 0;
 401 out:
 402         spin_unlock_irqrestore(&p_tx->lock, flags);
 403         return rc;
 404 }
 405
 406 static void qed_ll2_rxq_parse_gsi(struct qed_hwfn *p_hwfn,
 407                                   union core_rx_cqe_union *p_cqe,
 408                                   struct qed_ll2_comp_rx_data *data)
 409 {
 410         data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags);
 411         data->length.data_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length);
 412         data->vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan);
 413         data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi);
 414         data->opaque_data_1 = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo);
 415         data->u.data_length_error = p_cqe->rx_cqe_gsi.data_length_error;
 416 }
 417
 418 static void qed_ll2_rxq_parse_reg(struct qed_hwfn *p_hwfn,
 419                                   union core_rx_cqe_union *p_cqe,
 420                                   struct qed_ll2_comp_rx_data *data)
 421 {
 422         data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_fp.parse_flags.flags);
 423         data->length.packet_length =
 424             le16_to_cpu(p_cqe->rx_cqe_fp.packet_length);
 425         data->vlan = le16_to_cpu(p_cqe->rx_cqe_fp.vlan);
 426         data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[0]);
 427         data->opaque_data_1 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[1]);
 428         data->u.placement_offset = p_cqe->rx_cqe_fp.placement_offset;
 429 }
 430
 431 static int
 432 qed_ll2_rxq_handle_completion(struct qed_hwfn *p_hwfn,
 433                               struct qed_ll2_info *p_ll2_conn,
 434                               union core_rx_cqe_union *p_cqe,
 435                               unsigned long *p_lock_flags, bool b_last_cqe)
 436 {
 437         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 438         struct qed_ll2_rx_packet *p_pkt = NULL;
 439         struct qed_ll2_comp_rx_data data;
 440
 441         if (!list_empty(&p_rx->active_descq))
 442                 p_pkt = list_first_entry(&p_rx->active_descq,
 443                                          struct qed_ll2_rx_packet, list_entry);
 444         if (!p_pkt) {
 445                 DP_NOTICE(p_hwfn,
 446                           "[%d] LL2 Rx completion but active_descq is empty\n",
 447                           p_ll2_conn->input.conn_type);
 448
 449                 return -EIO;
 450         }
 451         list_del(&p_pkt->list_entry);
 452
 453         if (p_cqe->rx_cqe_sp.type == CORE_RX_CQE_TYPE_REGULAR)
 454                 qed_ll2_rxq_parse_reg(p_hwfn, p_cqe, &data);
 455         else
 456                 qed_ll2_rxq_parse_gsi(p_hwfn, p_cqe, &data);
 457         if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)
 458                 DP_NOTICE(p_hwfn,
 459                           "Mismatch between active_descq and the LL2 Rx chain\n");
 460
 461         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 462
 463         data.connection_handle = p_ll2_conn->my_id;
 464         data.cookie = p_pkt->cookie;
 465         data.rx_buf_addr = p_pkt->rx_buf_addr;
 466         data.b_last_packet = b_last_cqe;
 467
 468         spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
 469         p_ll2_conn->cbs.rx_comp_cb(p_ll2_conn->cbs.cookie, &data);
 470
 471         spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
 472
 473         return 0;
 474 }
 475
 476 static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie)
 477 {
 478         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)cookie;
 479         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 480         union core_rx_cqe_union *cqe = NULL;
 481         u16 cq_new_idx = 0, cq_old_idx = 0;
 482         unsigned long flags = 0;
 483         int rc = 0;
 484
 485         spin_lock_irqsave(&p_rx->lock, flags);
 486         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 487         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 488
 489         while (cq_new_idx != cq_old_idx) {
 490                 bool b_last_cqe = (cq_new_idx == cq_old_idx);
 491
 492                 cqe =
 493                     (union core_rx_cqe_union *)
 494                     qed_chain_consume(&p_rx->rcq_chain);
 495                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 496
 497                 DP_VERBOSE(p_hwfn,
 498                            QED_MSG_LL2,
 499                            "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n",
 500                            cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type);
 501
 502                 switch (cqe->rx_cqe_sp.type) {
 503                 case CORE_RX_CQE_TYPE_SLOW_PATH:
 504                         DP_NOTICE(p_hwfn, "LL2 - unexpected Rx CQE slowpath\n");
 505                         rc = -EINVAL;
 506                         break;
 507                 case CORE_RX_CQE_TYPE_GSI_OFFLOAD:
 508                 case CORE_RX_CQE_TYPE_REGULAR:
 509                         rc = qed_ll2_rxq_handle_completion(p_hwfn, p_ll2_conn,
 510                                                            cqe, &flags,
 511                                                            b_last_cqe);
 512                         break;
 513                 default:
 514                         rc = -EIO;
 515                 }
 516         }
 517
 518         spin_unlock_irqrestore(&p_rx->lock, flags);
 519         return rc;
 520 }
 521
 522 static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 523 {
 524         struct qed_ll2_info *p_ll2_conn = NULL;
 525         struct qed_ll2_rx_packet *p_pkt = NULL;
 526         struct qed_ll2_rx_queue *p_rx;
 527
 528         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 529         if (!p_ll2_conn)
 530                 return;
 531
 532         p_rx = &p_ll2_conn->rx_queue;
 533
 534         while (!list_empty(&p_rx->active_descq)) {
 535                 p_pkt = list_first_entry(&p_rx->active_descq,
 536                                          struct qed_ll2_rx_packet, list_entry);
 537                 if (!p_pkt)
 538                         break;
 539
 540                 list_move_tail(&p_pkt->list_entry, &p_rx->free_descq);
 541
 542                 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
 543                         struct qed_ooo_buffer *p_buffer;
 544
 545                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 546                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 547                                                 p_buffer);
 548                 } else {
 549                         dma_addr_t rx_buf_addr = p_pkt->rx_buf_addr;
 550                         void *cookie = p_pkt->cookie;
 551                         bool b_last;
 552
 553                         b_last = list_empty(&p_rx->active_descq);
 554                         p_ll2_conn->cbs.rx_release_cb(p_ll2_conn->cbs.cookie,
 555                                                       p_ll2_conn->my_id,
 556                                                       cookie,
 557                                                       rx_buf_addr, b_last);
 558                 }
 559         }
 560 }
 561
 562 static u8 qed_ll2_convert_rx_parse_to_tx_flags(u16 parse_flags)
 563 {
 564         u8 bd_flags = 0;
 565
 566         if (GET_FIELD(parse_flags, PARSING_AND_ERR_FLAGS_TAG8021QEXIST))
 567                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_VLAN_INSERTION, 1);
 568
 569         return bd_flags;
 570 }
 571
 572 static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn,
 573                                   struct qed_ll2_info *p_ll2_conn)
 574 {
 575         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 576         u16 packet_length = 0, parse_flags = 0, vlan = 0;
 577         struct qed_ll2_rx_packet *p_pkt = NULL;
 578         u32 num_ooo_add_to_peninsula = 0, cid;
 579         union core_rx_cqe_union *cqe = NULL;
 580         u16 cq_new_idx = 0, cq_old_idx = 0;
 581         struct qed_ooo_buffer *p_buffer;
 582         struct ooo_opaque *iscsi_ooo;
 583         u8 placement_offset = 0;
 584         u8 cqe_type;
 585
 586         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 587         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 588         if (cq_new_idx == cq_old_idx)
 589                 return 0;
 590
 591         while (cq_new_idx != cq_old_idx) {
 592                 struct core_rx_fast_path_cqe *p_cqe_fp;
 593
 594                 cqe = qed_chain_consume(&p_rx->rcq_chain);
 595                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 596                 cqe_type = cqe->rx_cqe_sp.type;
 597
 598                 if (cqe_type != CORE_RX_CQE_TYPE_REGULAR) {
 599                         DP_NOTICE(p_hwfn,
 600                                   "Got a non-regular LB LL2 completion [type 0x%02x]\n",
 601                                   cqe_type);
 602                         return -EINVAL;
 603                 }
 604                 p_cqe_fp = &cqe->rx_cqe_fp;
 605
 606                 placement_offset = p_cqe_fp->placement_offset;
 607                 parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags);
 608                 packet_length = le16_to_cpu(p_cqe_fp->packet_length);
 609                 vlan = le16_to_cpu(p_cqe_fp->vlan);
 610                 iscsi_ooo = (struct ooo_opaque *)&p_cqe_fp->opaque_data;
 611                 qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info,
 612                                            iscsi_ooo);
 613                 cid = le32_to_cpu(iscsi_ooo->cid);
 614
 615                 /* Process delete isle first */
 616                 if (iscsi_ooo->drop_size)
 617                         qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid,
 618                                              iscsi_ooo->drop_isle,
 619                                              iscsi_ooo->drop_size);
 620
 621                 if (iscsi_ooo->ooo_opcode == TCP_EVENT_NOP)
 622                         continue;
 623
 624                 /* Now process create/add/join isles */
 625                 if (list_empty(&p_rx->active_descq)) {
 626                         DP_NOTICE(p_hwfn,
 627                                   "LL2 OOO RX chain has no submitted buffers\n"
 628                                   );
 629                         return -EIO;
 630                 }
 631
 632                 p_pkt = list_first_entry(&p_rx->active_descq,
 633                                          struct qed_ll2_rx_packet, list_entry);
 634
 635                 if ((iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE) ||
 636                     (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT) ||
 637                     (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT) ||
 638                     (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_PEN) ||
 639                     (iscsi_ooo->ooo_opcode == TCP_EVENT_JOIN)) {
 640                         if (!p_pkt) {
 641                                 DP_NOTICE(p_hwfn,
 642                                           "LL2 OOO RX packet is not valid\n");
 643                                 return -EIO;
 644                         }
 645                         list_del(&p_pkt->list_entry);
 646                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 647                         p_buffer->packet_length = packet_length;
 648                         p_buffer->parse_flags = parse_flags;
 649                         p_buffer->vlan = vlan;
 650                         p_buffer->placement_offset = placement_offset;
 651                         qed_chain_consume(&p_rx->rxq_chain);
 652                         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 653
 654                         switch (iscsi_ooo->ooo_opcode) {
 655                         case TCP_EVENT_ADD_NEW_ISLE:
 656                                 qed_ooo_add_new_isle(p_hwfn,
 657                                                      p_hwfn->p_ooo_info,
 658                                                      cid,
 659                                                      iscsi_ooo->ooo_isle,
 660                                                      p_buffer);
 661                                 break;
 662                         case TCP_EVENT_ADD_ISLE_RIGHT:
 663                                 qed_ooo_add_new_buffer(p_hwfn,
 664                                                        p_hwfn->p_ooo_info,
 665                                                        cid,
 666                                                        iscsi_ooo->ooo_isle,
 667                                                        p_buffer,
 668                                                        QED_OOO_RIGHT_BUF);
 669                                 break;
 670                         case TCP_EVENT_ADD_ISLE_LEFT:
 671                                 qed_ooo_add_new_buffer(p_hwfn,
 672                                                        p_hwfn->p_ooo_info,
 673                                                        cid,
 674                                                        iscsi_ooo->ooo_isle,
 675                                                        p_buffer,
 676                                                        QED_OOO_LEFT_BUF);
 677                                 break;
 678                         case TCP_EVENT_JOIN:
 679                                 qed_ooo_add_new_buffer(p_hwfn,
 680                                                        p_hwfn->p_ooo_info,
 681                                                        cid,
 682                                                        iscsi_ooo->ooo_isle +
 683                                                        1,
 684                                                        p_buffer,
 685                                                        QED_OOO_LEFT_BUF);
 686                                 qed_ooo_join_isles(p_hwfn,
 687                                                    p_hwfn->p_ooo_info,
 688                                                    cid, iscsi_ooo->ooo_isle);
 689                                 break;
 690                         case TCP_EVENT_ADD_PEN:
 691                                 num_ooo_add_to_peninsula++;
 692                                 qed_ooo_put_ready_buffer(p_hwfn,
 693                                                          p_hwfn->p_ooo_info,
 694                                                          p_buffer, true);
 695                                 break;
 696                         }
 697                 } else {
 698                         DP_NOTICE(p_hwfn,
 699                                   "Unexpected event (%d) TX OOO completion\n",
 700                                   iscsi_ooo->ooo_opcode);
 701                 }
 702         }
 703
 704         return 0;
 705 }
 706
 707 static void
 708 qed_ooo_submit_tx_buffers(struct qed_hwfn *p_hwfn,
 709                           struct qed_ll2_info *p_ll2_conn)
 710 {
 711         struct qed_ll2_tx_pkt_info tx_pkt;
 712         struct qed_ooo_buffer *p_buffer;
 713         u16 l4_hdr_offset_w;
 714         dma_addr_t first_frag;
 715         u16 parse_flags;
 716         u8 bd_flags;
 717         int rc;
 718
 719         /* Submit Tx buffers here */
 720         while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn,
 721                                                     p_hwfn->p_ooo_info))) {
 722                 l4_hdr_offset_w = 0;
 723                 bd_flags = 0;
 724
 725                 first_frag = p_buffer->rx_buffer_phys_addr +
 726                              p_buffer->placement_offset;
 727                 parse_flags = p_buffer->parse_flags;
 728                 bd_flags = qed_ll2_convert_rx_parse_to_tx_flags(parse_flags);
 729                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_FORCE_VLAN_MODE, 1);
 730                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_L4_PROTOCOL, 1);
 731
 732                 memset(&tx_pkt, 0, sizeof(tx_pkt));
 733                 tx_pkt.num_of_bds = 1;
 734                 tx_pkt.vlan = p_buffer->vlan;
 735                 tx_pkt.bd_flags = bd_flags;
 736                 tx_pkt.l4_hdr_offset_w = l4_hdr_offset_w;
 737                 tx_pkt.tx_dest = p_ll2_conn->tx_dest;
 738                 tx_pkt.first_frag = first_frag;
 739                 tx_pkt.first_frag_len = p_buffer->packet_length;
 740                 tx_pkt.cookie = p_buffer;
 741
 742                 rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id,
 743                                                &tx_pkt, true);
 744                 if (rc) {
 745                         qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info,
 746                                                  p_buffer, false);
 747                         break;
 748                 }
 749         }
 750 }
 751
 752 static void
 753 qed_ooo_submit_rx_buffers(struct qed_hwfn *p_hwfn,
 754                           struct qed_ll2_info *p_ll2_conn)
 755 {
 756         struct qed_ooo_buffer *p_buffer;
 757         int rc;
 758
 759         while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
 760                                                    p_hwfn->p_ooo_info))) {
 761                 rc = qed_ll2_post_rx_buffer(p_hwfn,
 762                                             p_ll2_conn->my_id,
 763                                             p_buffer->rx_buffer_phys_addr,
 764                                             0, p_buffer, true);
 765                 if (rc) {
 766                         qed_ooo_put_free_buffer(p_hwfn,
 767                                                 p_hwfn->p_ooo_info, p_buffer);
 768                         break;
 769                 }
 770         }
 771 }
 772
 773 static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 774 {
 775         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
 776         int rc;
 777
 778         rc = qed_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn);
 779         if (rc)
 780                 return rc;
 781
 782         qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
 783         qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
 784
 785         return 0;
 786 }
 787
 788 static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 789 {
 790         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
 791         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 792         struct qed_ll2_tx_packet *p_pkt = NULL;
 793         struct qed_ooo_buffer *p_buffer;
 794         bool b_dont_submit_rx = false;
 795         u16 new_idx = 0, num_bds = 0;
 796         int rc;
 797
 798         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 799         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 800
 801         if (!num_bds)
 802                 return 0;
 803
 804         while (num_bds) {
 805                 if (list_empty(&p_tx->active_descq))
 806                         return -EINVAL;
 807
 808                 p_pkt = list_first_entry(&p_tx->active_descq,
 809                                          struct qed_ll2_tx_packet, list_entry);
 810                 if (!p_pkt)
 811                         return -EINVAL;
 812
 813                 if (p_pkt->bd_used != 1) {
 814                         DP_NOTICE(p_hwfn,
 815                                   "Unexpectedly many BDs(%d) in TX OOO completion\n",
 816                                   p_pkt->bd_used);
 817                         return -EINVAL;
 818                 }
 819
 820                 list_del(&p_pkt->list_entry);
 821
 822                 num_bds--;
 823                 p_tx->bds_idx++;
 824                 qed_chain_consume(&p_tx->txq_chain);
 825
 826                 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 827                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 828
 829                 if (b_dont_submit_rx) {
 830                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 831                                                 p_buffer);
 832                         continue;
 833                 }
 834
 835                 rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id,
 836                                             p_buffer->rx_buffer_phys_addr, 0,
 837                                             p_buffer, true);
 838                 if (rc != 0) {
 839                         qed_ooo_put_free_buffer(p_hwfn,
 840                                                 p_hwfn->p_ooo_info, p_buffer);
 841                         b_dont_submit_rx = true;
 842                 }
 843         }
 844
 845         qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
 846
 847         return 0;
 848 }
 849
 850 static void qed_ll2_stop_ooo(struct qed_dev *cdev)
 851 {
 852         struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
 853         u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
 854
 855         DP_VERBOSE(cdev, QED_MSG_STORAGE, "Stopping LL2 OOO queue [%02x]\n",
 856                    *handle);
 857
 858         qed_ll2_terminate_connection(hwfn, *handle);
 859         qed_ll2_release_connection(hwfn, *handle);
 860         *handle = QED_LL2_UNUSED_HANDLE;
 861 }
 862
 863 static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn,
 864                                      struct qed_ll2_info *p_ll2_conn,
 865                                      u8 action_on_error)
 866 {
 867         enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
 868         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 869         struct core_rx_start_ramrod_data *p_ramrod = NULL;
 870         struct qed_spq_entry *p_ent = NULL;
 871         struct qed_sp_init_data init_data;
 872         u16 cqe_pbl_size;
 873         int rc = 0;
 874
 875         /* Get SPQ entry */
 876         memset(&init_data, 0, sizeof(init_data));
 877         init_data.cid = p_ll2_conn->cid;
 878         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 879         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 880
 881         rc = qed_sp_init_request(p_hwfn, &p_ent,
 882                                  CORE_RAMROD_RX_QUEUE_START,
 883                                  PROTOCOLID_CORE, &init_data);
 884         if (rc)
 885                 return rc;
 886
 887         p_ramrod = &p_ent->ramrod.core_rx_queue_start;
 888
 889         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
 890         p_ramrod->sb_index = p_rx->rx_sb_index;
 891         p_ramrod->complete_event_flg = 1;
 892
 893         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
 894         DMA_REGPAIR_LE(p_ramrod->bd_base, p_rx->rxq_chain.p_phys_addr);
 895         cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain);
 896         p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size);
 897         DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr,
 898                        qed_chain_get_pbl_phys(&p_rx->rcq_chain));
 899
 900         p_ramrod->drop_ttl0_flg = p_ll2_conn->input.rx_drop_ttl0_flg;
 901         p_ramrod->inner_vlan_removal_en = p_ll2_conn->input.rx_vlan_removal_en;
 902         p_ramrod->queue_id = p_ll2_conn->queue_id;
 903         p_ramrod->main_func_queue = (conn_type == QED_LL2_TYPE_OOO) ? 0 : 1;
 904
 905         if ((IS_MF_DEFAULT(p_hwfn) || IS_MF_SI(p_hwfn)) &&
 906             p_ramrod->main_func_queue && (conn_type != QED_LL2_TYPE_ROCE) &&
 907             (conn_type != QED_LL2_TYPE_IWARP)) {
 908                 p_ramrod->mf_si_bcast_accept_all = 1;
 909                 p_ramrod->mf_si_mcast_accept_all = 1;
 910         } else {
 911                 p_ramrod->mf_si_bcast_accept_all = 0;
 912                 p_ramrod->mf_si_mcast_accept_all = 0;
 913         }
 914
 915         p_ramrod->action_on_error.error_type = action_on_error;
 916         p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
 917         return qed_spq_post(p_hwfn, p_ent, NULL);
 918 }
 919
 920 static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
 921                                      struct qed_ll2_info *p_ll2_conn)
 922 {
 923         enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
 924         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 925         struct core_tx_start_ramrod_data *p_ramrod = NULL;
 926         struct qed_spq_entry *p_ent = NULL;
 927         struct qed_sp_init_data init_data;
 928         u16 pq_id = 0, pbl_size;
 929         int rc = -EINVAL;
 930
 931         if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
 932                 return 0;
 933
 934         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
 935                 p_ll2_conn->tx_stats_en = 0;
 936         else
 937                 p_ll2_conn->tx_stats_en = 1;
 938
 939         /* Get SPQ entry */
 940         memset(&init_data, 0, sizeof(init_data));
 941         init_data.cid = p_ll2_conn->cid;
 942         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 943         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 944
 945         rc = qed_sp_init_request(p_hwfn, &p_ent,
 946                                  CORE_RAMROD_TX_QUEUE_START,
 947                                  PROTOCOLID_CORE, &init_data);
 948         if (rc)
 949                 return rc;
 950
 951         p_ramrod = &p_ent->ramrod.core_tx_queue_start;
 952
 953         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
 954         p_ramrod->sb_index = p_tx->tx_sb_index;
 955         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
 956         p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
 957         p_ramrod->stats_id = p_ll2_conn->tx_stats_id;
 958
 959         DMA_REGPAIR_LE(p_ramrod->pbl_base_addr,
 960                        qed_chain_get_pbl_phys(&p_tx->txq_chain));
 961         pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain);
 962         p_ramrod->pbl_size = cpu_to_le16(pbl_size);
 963
 964         switch (p_ll2_conn->input.tx_tc) {
 965         case PURE_LB_TC:
 966                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
 967                 break;
 968         case PKT_LB_TC:
 969                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO);
 970                 break;
 971         default:
 972                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
 973                 break;
 974         }
 975
 976         p_ramrod->qm_pq_id = cpu_to_le16(pq_id);
 977
 978         switch (conn_type) {
 979         case QED_LL2_TYPE_FCOE:
 980                 p_ramrod->conn_type = PROTOCOLID_FCOE;
 981                 break;
 982         case QED_LL2_TYPE_ISCSI:
 983                 p_ramrod->conn_type = PROTOCOLID_ISCSI;
 984                 break;
 985         case QED_LL2_TYPE_ROCE:
 986                 p_ramrod->conn_type = PROTOCOLID_ROCE;
 987                 break;
 988         case QED_LL2_TYPE_IWARP:
 989                 p_ramrod->conn_type = PROTOCOLID_IWARP;
 990                 break;
 991         case QED_LL2_TYPE_OOO:
 992                 if (p_hwfn->hw_info.personality == QED_PCI_ISCSI)
 993                         p_ramrod->conn_type = PROTOCOLID_ISCSI;
 994                 else
 995                         p_ramrod->conn_type = PROTOCOLID_IWARP;
 996                 break;
 997         default:
 998                 p_ramrod->conn_type = PROTOCOLID_ETH;
 999                 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type);
1000         }
1001
1002         p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1003
1004         return qed_spq_post(p_hwfn, p_ent, NULL);
1005 }
1006
1007 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn,
1008                                     struct qed_ll2_info *p_ll2_conn)
1009 {
1010         struct core_rx_stop_ramrod_data *p_ramrod = NULL;
1011         struct qed_spq_entry *p_ent = NULL;
1012         struct qed_sp_init_data init_data;
1013         int rc = -EINVAL;
1014
1015         /* Get SPQ entry */
1016         memset(&init_data, 0, sizeof(init_data));
1017         init_data.cid = p_ll2_conn->cid;
1018         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1019         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1020
1021         rc = qed_sp_init_request(p_hwfn, &p_ent,
1022                                  CORE_RAMROD_RX_QUEUE_STOP,
1023                                  PROTOCOLID_CORE, &init_data);
1024         if (rc)
1025                 return rc;
1026
1027         p_ramrod = &p_ent->ramrod.core_rx_queue_stop;
1028
1029         p_ramrod->complete_event_flg = 1;
1030         p_ramrod->queue_id = p_ll2_conn->queue_id;
1031
1032         return qed_spq_post(p_hwfn, p_ent, NULL);
1033 }
1034
1035 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn,
1036                                     struct qed_ll2_info *p_ll2_conn)
1037 {
1038         struct qed_spq_entry *p_ent = NULL;
1039         struct qed_sp_init_data init_data;
1040         int rc = -EINVAL;
1041
1042         /* Get SPQ entry */
1043         memset(&init_data, 0, sizeof(init_data));
1044         init_data.cid = p_ll2_conn->cid;
1045         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1046         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1047
1048         rc = qed_sp_init_request(p_hwfn, &p_ent,
1049                                  CORE_RAMROD_TX_QUEUE_STOP,
1050                                  PROTOCOLID_CORE, &init_data);
1051         if (rc)
1052                 return rc;
1053
1054         return qed_spq_post(p_hwfn, p_ent, NULL);
1055 }
1056
1057 static int
1058 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
1059                               struct qed_ll2_info *p_ll2_info)
1060 {
1061         struct qed_ll2_rx_packet *p_descq;
1062         u32 capacity;
1063         int rc = 0;
1064
1065         if (!p_ll2_info->input.rx_num_desc)
1066                 goto out;
1067
1068         rc = qed_chain_alloc(p_hwfn->cdev,
1069                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1070                              QED_CHAIN_MODE_NEXT_PTR,
1071                              QED_CHAIN_CNT_TYPE_U16,
1072                              p_ll2_info->input.rx_num_desc,
1073                              sizeof(struct core_rx_bd),
1074                              &p_ll2_info->rx_queue.rxq_chain, NULL);
1075         if (rc) {
1076                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
1077                 goto out;
1078         }
1079
1080         capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
1081         p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet),
1082                           GFP_KERNEL);
1083         if (!p_descq) {
1084                 rc = -ENOMEM;
1085                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n");
1086                 goto out;
1087         }
1088         p_ll2_info->rx_queue.descq_array = p_descq;
1089
1090         rc = qed_chain_alloc(p_hwfn->cdev,
1091                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1092                              QED_CHAIN_MODE_PBL,
1093                              QED_CHAIN_CNT_TYPE_U16,
1094                              p_ll2_info->input.rx_num_desc,
1095                              sizeof(struct core_rx_fast_path_cqe),
1096                              &p_ll2_info->rx_queue.rcq_chain, NULL);
1097         if (rc) {
1098                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
1099                 goto out;
1100         }
1101
1102         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1103                    "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
1104                    p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc);
1105
1106 out:
1107         return rc;
1108 }
1109
1110 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
1111                                          struct qed_ll2_info *p_ll2_info)
1112 {
1113         struct qed_ll2_tx_packet *p_descq;
1114         u32 capacity;
1115         int rc = 0;
1116
1117         if (!p_ll2_info->input.tx_num_desc)
1118                 goto out;
1119
1120         rc = qed_chain_alloc(p_hwfn->cdev,
1121                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1122                              QED_CHAIN_MODE_PBL,
1123                              QED_CHAIN_CNT_TYPE_U16,
1124                              p_ll2_info->input.tx_num_desc,
1125                              sizeof(struct core_tx_bd),
1126                              &p_ll2_info->tx_queue.txq_chain, NULL);
1127         if (rc)
1128                 goto out;
1129
1130         capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
1131         p_descq = kcalloc(capacity, sizeof(struct qed_ll2_tx_packet),
1132                           GFP_KERNEL);
1133         if (!p_descq) {
1134                 rc = -ENOMEM;
1135                 goto out;
1136         }
1137         p_ll2_info->tx_queue.descq_array = p_descq;
1138
1139         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1140                    "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
1141                    p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc);
1142
1143 out:
1144         if (rc)
1145                 DP_NOTICE(p_hwfn,
1146                           "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
1147                           p_ll2_info->input.tx_num_desc);
1148         return rc;
1149 }
1150
1151 static int
1152 qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn,
1153                                struct qed_ll2_info *p_ll2_info, u16 mtu)
1154 {
1155         struct qed_ooo_buffer *p_buf = NULL;
1156         void *p_virt;
1157         u16 buf_idx;
1158         int rc = 0;
1159
1160         if (p_ll2_info->input.conn_type != QED_LL2_TYPE_OOO)
1161                 return rc;
1162
1163         /* Correct number of requested OOO buffers if needed */
1164         if (!p_ll2_info->input.rx_num_ooo_buffers) {
1165                 u16 num_desc = p_ll2_info->input.rx_num_desc;
1166
1167                 if (!num_desc)
1168                         return -EINVAL;
1169                 p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2;
1170         }
1171
1172         for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers;
1173              buf_idx++) {
1174                 p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL);
1175                 if (!p_buf) {
1176                         rc = -ENOMEM;
1177                         goto out;
1178                 }
1179
1180                 p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE;
1181                 p_buf->rx_buffer_size = (p_buf->rx_buffer_size +
1182                                          ETH_CACHE_LINE_SIZE - 1) &
1183                                         ~(ETH_CACHE_LINE_SIZE - 1);
1184                 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
1185                                             p_buf->rx_buffer_size,
1186                                             &p_buf->rx_buffer_phys_addr,
1187                                             GFP_KERNEL);
1188                 if (!p_virt) {
1189                         kfree(p_buf);
1190                         rc = -ENOMEM;
1191                         goto out;
1192                 }
1193
1194                 p_buf->rx_buffer_virt_addr = p_virt;
1195                 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf);
1196         }
1197
1198         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1199                    "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n",
1200                    p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size);
1201
1202 out:
1203         return rc;
1204 }
1205
1206 static int
1207 qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs)
1208 {
1209         if (!cbs || (!cbs->rx_comp_cb ||
1210                      !cbs->rx_release_cb ||
1211                      !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie))
1212                 return -EINVAL;
1213
1214         p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb;
1215         p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb;
1216         p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb;
1217         p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb;
1218         p_ll2_info->cbs.cookie = cbs->cookie;
1219
1220         return 0;
1221 }
1222
1223 static enum core_error_handle
1224 qed_ll2_get_error_choice(enum qed_ll2_error_handle err)
1225 {
1226         switch (err) {
1227         case QED_LL2_DROP_PACKET:
1228                 return LL2_DROP_PACKET;
1229         case QED_LL2_DO_NOTHING:
1230                 return LL2_DO_NOTHING;
1231         case QED_LL2_ASSERT:
1232                 return LL2_ASSERT;
1233         default:
1234                 return LL2_DO_NOTHING;
1235         }
1236 }
1237
1238 int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data)
1239 {
1240         struct qed_hwfn *p_hwfn = cxt;
1241         qed_int_comp_cb_t comp_rx_cb, comp_tx_cb;
1242         struct qed_ll2_info *p_ll2_info = NULL;
1243         u8 i, *p_tx_max;
1244         int rc;
1245
1246         if (!data->p_connection_handle || !p_hwfn->p_ll2_info)
1247                 return -EINVAL;
1248
1249         /* Find a free connection to be used */
1250         for (i = 0; (i < QED_MAX_NUM_OF_LL2_CONNECTIONS); i++) {
1251                 mutex_lock(&p_hwfn->p_ll2_info[i].mutex);
1252                 if (p_hwfn->p_ll2_info[i].b_active) {
1253                         mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1254                         continue;
1255                 }
1256
1257                 p_hwfn->p_ll2_info[i].b_active = true;
1258                 p_ll2_info = &p_hwfn->p_ll2_info[i];
1259                 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1260                 break;
1261         }
1262         if (!p_ll2_info)
1263                 return -EBUSY;
1264
1265         memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input));
1266
1267         p_ll2_info->tx_dest = (data->input.tx_dest == QED_LL2_TX_DEST_NW) ?
1268                               CORE_TX_DEST_NW : CORE_TX_DEST_LB;
1269
1270         /* Correct maximum number of Tx BDs */
1271         p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet;
1272         if (*p_tx_max == 0)
1273                 *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET;
1274         else
1275                 *p_tx_max = min_t(u8, *p_tx_max,
1276                                   CORE_LL2_TX_MAX_BDS_PER_PACKET);
1277
1278         rc = qed_ll2_set_cbs(p_ll2_info, data->cbs);
1279         if (rc) {
1280                 DP_NOTICE(p_hwfn, "Invalid callback functions\n");
1281                 goto q_allocate_fail;
1282         }
1283
1284         rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info);
1285         if (rc)
1286                 goto q_allocate_fail;
1287
1288         rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info);
1289         if (rc)
1290                 goto q_allocate_fail;
1291
1292         rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info,
1293                                             data->input.mtu);
1294         if (rc)
1295                 goto q_allocate_fail;
1296
1297         /* Register callbacks for the Rx/Tx queues */
1298         if (data->input.conn_type == QED_LL2_TYPE_OOO) {
1299                 comp_rx_cb = qed_ll2_lb_rxq_completion;
1300                 comp_tx_cb = qed_ll2_lb_txq_completion;
1301         } else {
1302                 comp_rx_cb = qed_ll2_rxq_completion;
1303                 comp_tx_cb = qed_ll2_txq_completion;
1304         }
1305
1306         if (data->input.rx_num_desc) {
1307                 qed_int_register_cb(p_hwfn, comp_rx_cb,
1308                                     &p_hwfn->p_ll2_info[i],
1309                                     &p_ll2_info->rx_queue.rx_sb_index,
1310                                     &p_ll2_info->rx_queue.p_fw_cons);
1311                 p_ll2_info->rx_queue.b_cb_registred = true;
1312         }
1313
1314         if (data->input.tx_num_desc) {
1315                 qed_int_register_cb(p_hwfn,
1316                                     comp_tx_cb,
1317                                     &p_hwfn->p_ll2_info[i],
1318                                     &p_ll2_info->tx_queue.tx_sb_index,
1319                                     &p_ll2_info->tx_queue.p_fw_cons);
1320                 p_ll2_info->tx_queue.b_cb_registred = true;
1321         }
1322
1323         *data->p_connection_handle = i;
1324         return rc;
1325
1326 q_allocate_fail:
1327         qed_ll2_release_connection(p_hwfn, i);
1328         return -ENOMEM;
1329 }
1330
1331 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn,
1332                                            struct qed_ll2_info *p_ll2_conn)
1333 {
1334         enum qed_ll2_error_handle error_input;
1335         enum core_error_handle error_mode;
1336         u8 action_on_error = 0;
1337
1338         if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
1339                 return 0;
1340
1341         DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0);
1342         error_input = p_ll2_conn->input.ai_err_packet_too_big;
1343         error_mode = qed_ll2_get_error_choice(error_input);
1344         SET_FIELD(action_on_error,
1345                   CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode);
1346         error_input = p_ll2_conn->input.ai_err_no_buf;
1347         error_mode = qed_ll2_get_error_choice(error_input);
1348         SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode);
1349
1350         return qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
1351 }
1352
1353 static void
1354 qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn,
1355                                  struct qed_ll2_info *p_ll2_conn)
1356 {
1357         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
1358                 return;
1359
1360         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1361         qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
1362 }
1363
1364 int qed_ll2_establish_connection(void *cxt, u8 connection_handle)
1365 {
1366         struct qed_hwfn *p_hwfn = cxt;
1367         struct qed_ll2_info *p_ll2_conn;
1368         struct qed_ll2_rx_queue *p_rx;
1369         struct qed_ll2_tx_queue *p_tx;
1370         struct qed_ptt *p_ptt;
1371         int rc = -EINVAL;
1372         u32 i, capacity;
1373         u8 qid;
1374
1375         p_ptt = qed_ptt_acquire(p_hwfn);
1376         if (!p_ptt)
1377                 return -EAGAIN;
1378
1379         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1380         if (!p_ll2_conn) {
1381                 rc = -EINVAL;
1382                 goto out;
1383         }
1384
1385         p_rx = &p_ll2_conn->rx_queue;
1386         p_tx = &p_ll2_conn->tx_queue;
1387
1388         qed_chain_reset(&p_rx->rxq_chain);
1389         qed_chain_reset(&p_rx->rcq_chain);
1390         INIT_LIST_HEAD(&p_rx->active_descq);
1391         INIT_LIST_HEAD(&p_rx->free_descq);
1392         INIT_LIST_HEAD(&p_rx->posting_descq);
1393         spin_lock_init(&p_rx->lock);
1394         capacity = qed_chain_get_capacity(&p_rx->rxq_chain);
1395         for (i = 0; i < capacity; i++)
1396                 list_add_tail(&p_rx->descq_array[i].list_entry,
1397                               &p_rx->free_descq);
1398         *p_rx->p_fw_cons = 0;
1399
1400         qed_chain_reset(&p_tx->txq_chain);
1401         INIT_LIST_HEAD(&p_tx->active_descq);
1402         INIT_LIST_HEAD(&p_tx->free_descq);
1403         INIT_LIST_HEAD(&p_tx->sending_descq);
1404         spin_lock_init(&p_tx->lock);
1405         capacity = qed_chain_get_capacity(&p_tx->txq_chain);
1406         for (i = 0; i < capacity; i++)
1407                 list_add_tail(&p_tx->descq_array[i].list_entry,
1408                               &p_tx->free_descq);
1409         p_tx->cur_completing_bd_idx = 0;
1410         p_tx->bds_idx = 0;
1411         p_tx->b_completing_packet = false;
1412         p_tx->cur_send_packet = NULL;
1413         p_tx->cur_send_frag_num = 0;
1414         p_tx->cur_completing_frag_num = 0;
1415         *p_tx->p_fw_cons = 0;
1416
1417         rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
1418         if (rc)
1419                 goto out;
1420
1421         qid = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] + connection_handle;
1422         p_ll2_conn->queue_id = qid;
1423         p_ll2_conn->tx_stats_id = qid;
1424         p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview +
1425                                             GTT_BAR0_MAP_REG_TSDM_RAM +
1426                                             TSTORM_LL2_RX_PRODS_OFFSET(qid);
1427         p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells +
1428                                             qed_db_addr(p_ll2_conn->cid,
1429                                                         DQ_DEMS_LEGACY);
1430
1431         rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
1432         if (rc)
1433                 goto out;
1434
1435         rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
1436         if (rc)
1437                 goto out;
1438
1439         if (!QED_IS_RDMA_PERSONALITY(p_hwfn))
1440                 qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1);
1441
1442         qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn);
1443
1444         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1445                 qed_llh_add_protocol_filter(p_hwfn, p_ptt,
1446                                             0x8906, 0,
1447                                             QED_LLH_FILTER_ETHERTYPE);
1448                 qed_llh_add_protocol_filter(p_hwfn, p_ptt,
1449                                             0x8914, 0,
1450                                             QED_LLH_FILTER_ETHERTYPE);
1451         }
1452
1453 out:
1454         qed_ptt_release(p_hwfn, p_ptt);
1455         return rc;
1456 }
1457
1458 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn,
1459                                              struct qed_ll2_rx_queue *p_rx,
1460                                              struct qed_ll2_rx_packet *p_curp)
1461 {
1462         struct qed_ll2_rx_packet *p_posting_packet = NULL;
1463         struct core_ll2_rx_prod rx_prod = { 0, 0, 0 };
1464         bool b_notify_fw = false;
1465         u16 bd_prod, cq_prod;
1466
1467         /* This handles the flushing of already posted buffers */
1468         while (!list_empty(&p_rx->posting_descq)) {
1469                 p_posting_packet = list_first_entry(&p_rx->posting_descq,
1470                                                     struct qed_ll2_rx_packet,
1471                                                     list_entry);
1472                 list_move_tail(&p_posting_packet->list_entry,
1473                                &p_rx->active_descq);
1474                 b_notify_fw = true;
1475         }
1476
1477         /* This handles the supplied packet [if there is one] */
1478         if (p_curp) {
1479                 list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
1480                 b_notify_fw = true;
1481         }
1482
1483         if (!b_notify_fw)
1484                 return;
1485
1486         bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
1487         cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
1488         rx_prod.bd_prod = cpu_to_le16(bd_prod);
1489         rx_prod.cqe_prod = cpu_to_le16(cq_prod);
1490
1491         /* Make sure chain element is updated before ringing the doorbell */
1492         dma_wmb();
1493
1494         DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
1495 }
1496
1497 int qed_ll2_post_rx_buffer(void *cxt,
1498                            u8 connection_handle,
1499                            dma_addr_t addr,
1500                            u16 buf_len, void *cookie, u8 notify_fw)
1501 {
1502         struct qed_hwfn *p_hwfn = cxt;
1503         struct core_rx_bd_with_buff_len *p_curb = NULL;
1504         struct qed_ll2_rx_packet *p_curp = NULL;
1505         struct qed_ll2_info *p_ll2_conn;
1506         struct qed_ll2_rx_queue *p_rx;
1507         unsigned long flags;
1508         void *p_data;
1509         int rc = 0;
1510
1511         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1512         if (!p_ll2_conn)
1513                 return -EINVAL;
1514         p_rx = &p_ll2_conn->rx_queue;
1515
1516         spin_lock_irqsave(&p_rx->lock, flags);
1517         if (!list_empty(&p_rx->free_descq))
1518                 p_curp = list_first_entry(&p_rx->free_descq,
1519                                           struct qed_ll2_rx_packet, list_entry);
1520         if (p_curp) {
1521                 if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
1522                     qed_chain_get_elem_left(&p_rx->rcq_chain)) {
1523                         p_data = qed_chain_produce(&p_rx->rxq_chain);
1524                         p_curb = (struct core_rx_bd_with_buff_len *)p_data;
1525                         qed_chain_produce(&p_rx->rcq_chain);
1526                 }
1527         }
1528
1529         /* If we're lacking entires, let's try to flush buffers to FW */
1530         if (!p_curp || !p_curb) {
1531                 rc = -EBUSY;
1532                 p_curp = NULL;
1533                 goto out_notify;
1534         }
1535
1536         /* We have an Rx packet we can fill */
1537         DMA_REGPAIR_LE(p_curb->addr, addr);
1538         p_curb->buff_length = cpu_to_le16(buf_len);
1539         p_curp->rx_buf_addr = addr;
1540         p_curp->cookie = cookie;
1541         p_curp->rxq_bd = p_curb;
1542         p_curp->buf_length = buf_len;
1543         list_del(&p_curp->list_entry);
1544
1545         /* Check if we only want to enqueue this packet without informing FW */
1546         if (!notify_fw) {
1547                 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
1548                 goto out;
1549         }
1550
1551 out_notify:
1552         qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
1553 out:
1554         spin_unlock_irqrestore(&p_rx->lock, flags);
1555         return rc;
1556 }
1557
1558 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
1559                                           struct qed_ll2_tx_queue *p_tx,
1560                                           struct qed_ll2_tx_packet *p_curp,
1561                                           struct qed_ll2_tx_pkt_info *pkt,
1562                                           u8 notify_fw)
1563 {
1564         list_del(&p_curp->list_entry);
1565         p_curp->cookie = pkt->cookie;
1566         p_curp->bd_used = pkt->num_of_bds;
1567         p_curp->notify_fw = notify_fw;
1568         p_tx->cur_send_packet = p_curp;
1569         p_tx->cur_send_frag_num = 0;
1570
1571         p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag;
1572         p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len;
1573         p_tx->cur_send_frag_num++;
1574 }
1575
1576 static void
1577 qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
1578                                  struct qed_ll2_info *p_ll2,
1579                                  struct qed_ll2_tx_packet *p_curp,
1580                                  struct qed_ll2_tx_pkt_info *pkt)
1581 {
1582         struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
1583         u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
1584         struct core_tx_bd *start_bd = NULL;
1585         enum core_roce_flavor_type roce_flavor;
1586         enum core_tx_dest tx_dest;
1587         u16 bd_data = 0, frag_idx;
1588
1589         roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE
1590                                                              : CORE_RROCE;
1591
1592         tx_dest = (pkt->tx_dest == QED_LL2_TX_DEST_NW) ? CORE_TX_DEST_NW
1593                                                        : CORE_TX_DEST_LB;
1594
1595         start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1596         start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan);
1597         SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W,
1598                   cpu_to_le16(pkt->l4_hdr_offset_w));
1599         SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest);
1600         bd_data |= pkt->bd_flags;
1601         SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1);
1602         SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds);
1603         SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor);
1604         start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data);
1605         DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag);
1606         start_bd->nbytes = cpu_to_le16(pkt->first_frag_len);
1607
1608         DP_VERBOSE(p_hwfn,
1609                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1610                    "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",
1611                    p_ll2->queue_id,
1612                    p_ll2->cid,
1613                    p_ll2->input.conn_type,
1614                    prod_idx,
1615                    pkt->first_frag_len,
1616                    pkt->num_of_bds,
1617                    le32_to_cpu(start_bd->addr.hi),
1618                    le32_to_cpu(start_bd->addr.lo));
1619
1620         if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds)
1621                 return;
1622
1623         /* Need to provide the packet with additional BDs for frags */
1624         for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
1625              frag_idx < pkt->num_of_bds; frag_idx++) {
1626                 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
1627
1628                 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1629                 (*p_bd)->bd_data.as_bitfield = 0;
1630                 (*p_bd)->bitfield1 = 0;
1631                 p_curp->bds_set[frag_idx].tx_frag = 0;
1632                 p_curp->bds_set[frag_idx].frag_len = 0;
1633         }
1634 }
1635
1636 /* This should be called while the Txq spinlock is being held */
1637 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
1638                                      struct qed_ll2_info *p_ll2_conn)
1639 {
1640         bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
1641         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1642         struct qed_ll2_tx_packet *p_pkt = NULL;
1643         struct core_db_data db_msg = { 0, 0, 0 };
1644         u16 bd_prod;
1645
1646         /* If there are missing BDs, don't do anything now */
1647         if (p_ll2_conn->tx_queue.cur_send_frag_num !=
1648             p_ll2_conn->tx_queue.cur_send_packet->bd_used)
1649                 return;
1650
1651         /* Push the current packet to the list and clean after it */
1652         list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
1653                       &p_ll2_conn->tx_queue.sending_descq);
1654         p_ll2_conn->tx_queue.cur_send_packet = NULL;
1655         p_ll2_conn->tx_queue.cur_send_frag_num = 0;
1656
1657         /* Notify FW of packet only if requested to */
1658         if (!b_notify)
1659                 return;
1660
1661         bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
1662
1663         while (!list_empty(&p_tx->sending_descq)) {
1664                 p_pkt = list_first_entry(&p_tx->sending_descq,
1665                                          struct qed_ll2_tx_packet, list_entry);
1666                 if (!p_pkt)
1667                         break;
1668
1669                 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq);
1670         }
1671
1672         SET_FIELD(db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
1673         SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
1674         SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
1675                   DQ_XCM_CORE_TX_BD_PROD_CMD);
1676         db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
1677         db_msg.spq_prod = cpu_to_le16(bd_prod);
1678
1679         /* Make sure the BDs data is updated before ringing the doorbell */
1680         wmb();
1681
1682         DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&db_msg));
1683
1684         DP_VERBOSE(p_hwfn,
1685                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1686                    "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
1687                    p_ll2_conn->queue_id,
1688                    p_ll2_conn->cid,
1689                    p_ll2_conn->input.conn_type, db_msg.spq_prod);
1690 }
1691
1692 int qed_ll2_prepare_tx_packet(void *cxt,
1693                               u8 connection_handle,
1694                               struct qed_ll2_tx_pkt_info *pkt,
1695                               bool notify_fw)
1696 {
1697         struct qed_hwfn *p_hwfn = cxt;
1698         struct qed_ll2_tx_packet *p_curp = NULL;
1699         struct qed_ll2_info *p_ll2_conn = NULL;
1700         struct qed_ll2_tx_queue *p_tx;
1701         struct qed_chain *p_tx_chain;
1702         unsigned long flags;
1703         int rc = 0;
1704
1705         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1706         if (!p_ll2_conn)
1707                 return -EINVAL;
1708         p_tx = &p_ll2_conn->tx_queue;
1709         p_tx_chain = &p_tx->txq_chain;
1710
1711         if (pkt->num_of_bds > CORE_LL2_TX_MAX_BDS_PER_PACKET)
1712                 return -EIO;
1713
1714         spin_lock_irqsave(&p_tx->lock, flags);
1715         if (p_tx->cur_send_packet) {
1716                 rc = -EEXIST;
1717                 goto out;
1718         }
1719
1720         /* Get entry, but only if we have tx elements for it */
1721         if (!list_empty(&p_tx->free_descq))
1722                 p_curp = list_first_entry(&p_tx->free_descq,
1723                                           struct qed_ll2_tx_packet, list_entry);
1724         if (p_curp && qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds)
1725                 p_curp = NULL;
1726
1727         if (!p_curp) {
1728                 rc = -EBUSY;
1729                 goto out;
1730         }
1731
1732         /* Prepare packet and BD, and perhaps send a doorbell to FW */
1733         qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw);
1734
1735         qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt);
1736
1737         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1738
1739 out:
1740         spin_unlock_irqrestore(&p_tx->lock, flags);
1741         return rc;
1742 }
1743
1744 int qed_ll2_set_fragment_of_tx_packet(void *cxt,
1745                                       u8 connection_handle,
1746                                       dma_addr_t addr, u16 nbytes)
1747 {
1748         struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
1749         struct qed_hwfn *p_hwfn = cxt;
1750         struct qed_ll2_info *p_ll2_conn = NULL;
1751         u16 cur_send_frag_num = 0;
1752         struct core_tx_bd *p_bd;
1753         unsigned long flags;
1754
1755         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1756         if (!p_ll2_conn)
1757                 return -EINVAL;
1758
1759         if (!p_ll2_conn->tx_queue.cur_send_packet)
1760                 return -EINVAL;
1761
1762         p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
1763         cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
1764
1765         if (cur_send_frag_num >= p_cur_send_packet->bd_used)
1766                 return -EINVAL;
1767
1768         /* Fill the BD information, and possibly notify FW */
1769         p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
1770         DMA_REGPAIR_LE(p_bd->addr, addr);
1771         p_bd->nbytes = cpu_to_le16(nbytes);
1772         p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
1773         p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
1774
1775         p_ll2_conn->tx_queue.cur_send_frag_num++;
1776
1777         spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
1778         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1779         spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
1780
1781         return 0;
1782 }
1783
1784 int qed_ll2_terminate_connection(void *cxt, u8 connection_handle)
1785 {
1786         struct qed_hwfn *p_hwfn = cxt;
1787         struct qed_ll2_info *p_ll2_conn = NULL;
1788         int rc = -EINVAL;
1789         struct qed_ptt *p_ptt;
1790
1791         p_ptt = qed_ptt_acquire(p_hwfn);
1792         if (!p_ptt)
1793                 return -EAGAIN;
1794
1795         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1796         if (!p_ll2_conn) {
1797                 rc = -EINVAL;
1798                 goto out;
1799         }
1800
1801         /* Stop Tx & Rx of connection, if needed */
1802         if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
1803                 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
1804                 if (rc)
1805                         goto out;
1806                 qed_ll2_txq_flush(p_hwfn, connection_handle);
1807         }
1808
1809         if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
1810                 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
1811                 if (rc)
1812                         goto out;
1813                 qed_ll2_rxq_flush(p_hwfn, connection_handle);
1814         }
1815
1816         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
1817                 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1818
1819         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1820                 qed_llh_remove_protocol_filter(p_hwfn, p_ptt,
1821                                                0x8906, 0,
1822                                                QED_LLH_FILTER_ETHERTYPE);
1823                 qed_llh_remove_protocol_filter(p_hwfn, p_ptt,
1824                                                0x8914, 0,
1825                                                QED_LLH_FILTER_ETHERTYPE);
1826         }
1827
1828 out:
1829         qed_ptt_release(p_hwfn, p_ptt);
1830         return rc;
1831 }
1832
1833 static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn,
1834                                            struct qed_ll2_info *p_ll2_conn)
1835 {
1836         struct qed_ooo_buffer *p_buffer;
1837
1838         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
1839                 return;
1840
1841         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1842         while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
1843                                                    p_hwfn->p_ooo_info))) {
1844                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
1845                                   p_buffer->rx_buffer_size,
1846                                   p_buffer->rx_buffer_virt_addr,
1847                                   p_buffer->rx_buffer_phys_addr);
1848                 kfree(p_buffer);
1849         }
1850 }
1851
1852 void qed_ll2_release_connection(void *cxt, u8 connection_handle)
1853 {
1854         struct qed_hwfn *p_hwfn = cxt;
1855         struct qed_ll2_info *p_ll2_conn = NULL;
1856
1857         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1858         if (!p_ll2_conn)
1859                 return;
1860
1861         if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
1862                 p_ll2_conn->rx_queue.b_cb_registred = false;
1863                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
1864         }
1865
1866         if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
1867                 p_ll2_conn->tx_queue.b_cb_registred = false;
1868                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
1869         }
1870
1871         kfree(p_ll2_conn->tx_queue.descq_array);
1872         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
1873
1874         kfree(p_ll2_conn->rx_queue.descq_array);
1875         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
1876         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
1877
1878         qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
1879
1880         qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn);
1881
1882         mutex_lock(&p_ll2_conn->mutex);
1883         p_ll2_conn->b_active = false;
1884         mutex_unlock(&p_ll2_conn->mutex);
1885 }
1886
1887 int qed_ll2_alloc(struct qed_hwfn *p_hwfn)
1888 {
1889         struct qed_ll2_info *p_ll2_connections;
1890         u8 i;
1891
1892         /* Allocate LL2's set struct */
1893         p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
1894                                     sizeof(struct qed_ll2_info), GFP_KERNEL);
1895         if (!p_ll2_connections) {
1896                 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
1897                 return -ENOMEM;
1898         }
1899
1900         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
1901                 p_ll2_connections[i].my_id = i;
1902
1903         p_hwfn->p_ll2_info = p_ll2_connections;
1904         return 0;
1905 }
1906
1907 void qed_ll2_setup(struct qed_hwfn *p_hwfn)
1908 {
1909         int i;
1910
1911         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
1912                 mutex_init(&p_hwfn->p_ll2_info[i].mutex);
1913 }
1914
1915 void qed_ll2_free(struct qed_hwfn *p_hwfn)
1916 {
1917         if (!p_hwfn->p_ll2_info)
1918                 return;
1919
1920         kfree(p_hwfn->p_ll2_info);
1921         p_hwfn->p_ll2_info = NULL;
1922 }
1923
1924 static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn,
1925                                     struct qed_ptt *p_ptt,
1926                                     struct qed_ll2_stats *p_stats)
1927 {
1928         struct core_ll2_port_stats port_stats;
1929
1930         memset(&port_stats, 0, sizeof(port_stats));
1931         qed_memcpy_from(p_hwfn, p_ptt, &port_stats,
1932                         BAR0_MAP_REG_TSDM_RAM +
1933                         TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)),
1934                         sizeof(port_stats));
1935
1936         p_stats->gsi_invalid_hdr = HILO_64_REGPAIR(port_stats.gsi_invalid_hdr);
1937         p_stats->gsi_invalid_pkt_length =
1938             HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length);
1939         p_stats->gsi_unsupported_pkt_typ =
1940             HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ);
1941         p_stats->gsi_crcchksm_error =
1942             HILO_64_REGPAIR(port_stats.gsi_crcchksm_error);
1943 }
1944
1945 static void _qed_ll2_get_tstats(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_tstorm_per_queue_stat tstats;
1951         u8 qid = p_ll2_conn->queue_id;
1952         u32 tstats_addr;
1953
1954         memset(&tstats, 0, sizeof(tstats));
1955         tstats_addr = BAR0_MAP_REG_TSDM_RAM +
1956                       CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
1957         qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
1958
1959         p_stats->packet_too_big_discard =
1960                         HILO_64_REGPAIR(tstats.packet_too_big_discard);
1961         p_stats->no_buff_discard = HILO_64_REGPAIR(tstats.no_buff_discard);
1962 }
1963
1964 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
1965                                 struct qed_ptt *p_ptt,
1966                                 struct qed_ll2_info *p_ll2_conn,
1967                                 struct qed_ll2_stats *p_stats)
1968 {
1969         struct core_ll2_ustorm_per_queue_stat ustats;
1970         u8 qid = p_ll2_conn->queue_id;
1971         u32 ustats_addr;
1972
1973         memset(&ustats, 0, sizeof(ustats));
1974         ustats_addr = BAR0_MAP_REG_USDM_RAM +
1975                       CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
1976         qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
1977
1978         p_stats->rcv_ucast_bytes = HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
1979         p_stats->rcv_mcast_bytes = HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
1980         p_stats->rcv_bcast_bytes = HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
1981         p_stats->rcv_ucast_pkts = HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
1982         p_stats->rcv_mcast_pkts = HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
1983         p_stats->rcv_bcast_pkts = HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
1984 }
1985
1986 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
1987                                 struct qed_ptt *p_ptt,
1988                                 struct qed_ll2_info *p_ll2_conn,
1989                                 struct qed_ll2_stats *p_stats)
1990 {
1991         struct core_ll2_pstorm_per_queue_stat pstats;
1992         u8 stats_id = p_ll2_conn->tx_stats_id;
1993         u32 pstats_addr;
1994
1995         memset(&pstats, 0, sizeof(pstats));
1996         pstats_addr = BAR0_MAP_REG_PSDM_RAM +
1997                       CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
1998         qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
1999
2000         p_stats->sent_ucast_bytes = HILO_64_REGPAIR(pstats.sent_ucast_bytes);
2001         p_stats->sent_mcast_bytes = HILO_64_REGPAIR(pstats.sent_mcast_bytes);
2002         p_stats->sent_bcast_bytes = HILO_64_REGPAIR(pstats.sent_bcast_bytes);
2003         p_stats->sent_ucast_pkts = HILO_64_REGPAIR(pstats.sent_ucast_pkts);
2004         p_stats->sent_mcast_pkts = HILO_64_REGPAIR(pstats.sent_mcast_pkts);
2005         p_stats->sent_bcast_pkts = HILO_64_REGPAIR(pstats.sent_bcast_pkts);
2006 }
2007
2008 int qed_ll2_get_stats(void *cxt,
2009                       u8 connection_handle, struct qed_ll2_stats *p_stats)
2010 {
2011         struct qed_hwfn *p_hwfn = cxt;
2012         struct qed_ll2_info *p_ll2_conn = NULL;
2013         struct qed_ptt *p_ptt;
2014
2015         memset(p_stats, 0, sizeof(*p_stats));
2016
2017         if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
2018             !p_hwfn->p_ll2_info)
2019                 return -EINVAL;
2020
2021         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
2022
2023         p_ptt = qed_ptt_acquire(p_hwfn);
2024         if (!p_ptt) {
2025                 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
2026                 return -EINVAL;
2027         }
2028
2029         if (p_ll2_conn->input.gsi_enable)
2030                 _qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats);
2031         _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2032         _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2033         if (p_ll2_conn->tx_stats_en)
2034                 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2035
2036         qed_ptt_release(p_hwfn, p_ptt);
2037         return 0;
2038 }
2039
2040 static void qed_ll2b_release_rx_packet(void *cxt,
2041                                        u8 connection_handle,
2042                                        void *cookie,
2043                                        dma_addr_t rx_buf_addr,
2044                                        bool b_last_packet)
2045 {
2046         struct qed_hwfn *p_hwfn = cxt;
2047
2048         qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie);
2049 }
2050
2051 static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
2052                                     const struct qed_ll2_cb_ops *ops,
2053                                     void *cookie)
2054 {
2055         cdev->ll2->cbs = ops;
2056         cdev->ll2->cb_cookie = cookie;
2057 }
2058
2059 struct qed_ll2_cbs ll2_cbs = {
2060         .rx_comp_cb = &qed_ll2b_complete_rx_packet,
2061         .rx_release_cb = &qed_ll2b_release_rx_packet,
2062         .tx_comp_cb = &qed_ll2b_complete_tx_packet,
2063         .tx_release_cb = &qed_ll2b_complete_tx_packet,
2064 };
2065
2066 static void qed_ll2_set_conn_data(struct qed_dev *cdev,
2067                                   struct qed_ll2_acquire_data *data,
2068                                   struct qed_ll2_params *params,
2069                                   enum qed_ll2_conn_type conn_type,
2070                                   u8 *handle, bool lb)
2071 {
2072         memset(data, 0, sizeof(*data));
2073
2074         data->input.conn_type = conn_type;
2075         data->input.mtu = params->mtu;
2076         data->input.rx_num_desc = QED_LL2_RX_SIZE;
2077         data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets;
2078         data->input.rx_vlan_removal_en = params->rx_vlan_stripping;
2079         data->input.tx_num_desc = QED_LL2_TX_SIZE;
2080         data->p_connection_handle = handle;
2081         data->cbs = &ll2_cbs;
2082         ll2_cbs.cookie = QED_LEADING_HWFN(cdev);
2083
2084         if (lb) {
2085                 data->input.tx_tc = PKT_LB_TC;
2086                 data->input.tx_dest = QED_LL2_TX_DEST_LB;
2087         } else {
2088                 data->input.tx_tc = 0;
2089                 data->input.tx_dest = QED_LL2_TX_DEST_NW;
2090         }
2091 }
2092
2093 static int qed_ll2_start_ooo(struct qed_dev *cdev,
2094                              struct qed_ll2_params *params)
2095 {
2096         struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
2097         u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
2098         struct qed_ll2_acquire_data data;
2099         int rc;
2100
2101         qed_ll2_set_conn_data(cdev, &data, params,
2102                               QED_LL2_TYPE_OOO, handle, true);
2103
2104         rc = qed_ll2_acquire_connection(hwfn, &data);
2105         if (rc) {
2106                 DP_INFO(cdev, "Failed to acquire LL2 OOO connection\n");
2107                 goto out;
2108         }
2109
2110         rc = qed_ll2_establish_connection(hwfn, *handle);
2111         if (rc) {
2112                 DP_INFO(cdev, "Failed to establist LL2 OOO connection\n");
2113                 goto fail;
2114         }
2115
2116         return 0;
2117
2118 fail:
2119         qed_ll2_release_connection(hwfn, *handle);
2120 out:
2121         *handle = QED_LL2_UNUSED_HANDLE;
2122         return rc;
2123 }
2124
2125 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
2126 {
2127         struct qed_ll2_buffer *buffer, *tmp_buffer;
2128         enum qed_ll2_conn_type conn_type;
2129         struct qed_ll2_acquire_data data;
2130         struct qed_ptt *p_ptt;
2131         int rc, i;
2132
2133
2134         /* Initialize LL2 locks & lists */
2135         INIT_LIST_HEAD(&cdev->ll2->list);
2136         spin_lock_init(&cdev->ll2->lock);
2137         cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
2138                              L1_CACHE_BYTES + params->mtu;
2139
2140         /*Allocate memory for LL2 */
2141         DP_INFO(cdev, "Allocating LL2 buffers of size %08x bytes\n",
2142                 cdev->ll2->rx_size);
2143         for (i = 0; i < QED_LL2_RX_SIZE; i++) {
2144                 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2145                 if (!buffer) {
2146                         DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
2147                         goto fail;
2148                 }
2149
2150                 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
2151                                           &buffer->phys_addr);
2152                 if (rc) {
2153                         kfree(buffer);
2154                         goto fail;
2155                 }
2156
2157                 list_add_tail(&buffer->list, &cdev->ll2->list);
2158         }
2159
2160         switch (QED_LEADING_HWFN(cdev)->hw_info.personality) {
2161         case QED_PCI_FCOE:
2162                 conn_type = QED_LL2_TYPE_FCOE;
2163                 break;
2164         case QED_PCI_ISCSI:
2165                 conn_type = QED_LL2_TYPE_ISCSI;
2166                 break;
2167         case QED_PCI_ETH_ROCE:
2168                 conn_type = QED_LL2_TYPE_ROCE;
2169                 break;
2170         default:
2171                 conn_type = QED_LL2_TYPE_TEST;
2172         }
2173
2174         qed_ll2_set_conn_data(cdev, &data, params, conn_type,
2175                               &cdev->ll2->handle, false);
2176
2177         rc = qed_ll2_acquire_connection(QED_LEADING_HWFN(cdev), &data);
2178         if (rc) {
2179                 DP_INFO(cdev, "Failed to acquire LL2 connection\n");
2180                 goto fail;
2181         }
2182
2183         rc = qed_ll2_establish_connection(QED_LEADING_HWFN(cdev),
2184                                           cdev->ll2->handle);
2185         if (rc) {
2186                 DP_INFO(cdev, "Failed to establish LL2 connection\n");
2187                 goto release_fail;
2188         }
2189
2190         /* Post all Rx buffers to FW */
2191         spin_lock_bh(&cdev->ll2->lock);
2192         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) {
2193                 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev),
2194                                             cdev->ll2->handle,
2195                                             buffer->phys_addr, 0, buffer, 1);
2196                 if (rc) {
2197                         DP_INFO(cdev,
2198                                 "Failed to post an Rx buffer; Deleting it\n");
2199                         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
2200                                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
2201                         kfree(buffer->data);
2202                         list_del(&buffer->list);
2203                         kfree(buffer);
2204                 } else {
2205                         cdev->ll2->rx_cnt++;
2206                 }
2207         }
2208         spin_unlock_bh(&cdev->ll2->lock);
2209
2210         if (!cdev->ll2->rx_cnt) {
2211                 DP_INFO(cdev, "Failed passing even a single Rx buffer\n");
2212                 goto release_terminate;
2213         }
2214
2215         if (!is_valid_ether_addr(params->ll2_mac_address)) {
2216                 DP_INFO(cdev, "Invalid Ethernet address\n");
2217                 goto release_terminate;
2218         }
2219
2220         if (cdev->hwfns[0].hw_info.personality == QED_PCI_ISCSI &&
2221             cdev->hwfns[0].pf_params.iscsi_pf_params.ooo_enable) {
2222                 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n");
2223                 rc = qed_ll2_start_ooo(cdev, params);
2224                 if (rc) {
2225                         DP_INFO(cdev,
2226                                 "Failed to initialize the OOO LL2 queue\n");
2227                         goto release_terminate;
2228                 }
2229         }
2230
2231         p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
2232         if (!p_ptt) {
2233                 DP_INFO(cdev, "Failed to acquire PTT\n");
2234                 goto release_terminate;
2235         }
2236
2237         rc = qed_llh_add_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
2238                                     params->ll2_mac_address);
2239         qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
2240         if (rc) {
2241                 DP_ERR(cdev, "Failed to allocate LLH filter\n");
2242                 goto release_terminate_all;
2243         }
2244
2245         ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
2246         return 0;
2247
2248 release_terminate_all:
2249
2250 release_terminate:
2251         qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2252 release_fail:
2253         qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2254 fail:
2255         qed_ll2_kill_buffers(cdev);
2256         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2257         return -EINVAL;
2258 }
2259
2260 static int qed_ll2_stop(struct qed_dev *cdev)
2261 {
2262         struct qed_ptt *p_ptt;
2263         int rc;
2264
2265         if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
2266                 return 0;
2267
2268         p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
2269         if (!p_ptt) {
2270                 DP_INFO(cdev, "Failed to acquire PTT\n");
2271                 goto fail;
2272         }
2273
2274         qed_llh_remove_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
2275                                   cdev->ll2_mac_address);
2276         qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
2277         eth_zero_addr(cdev->ll2_mac_address);
2278
2279         if (cdev->hwfns[0].hw_info.personality == QED_PCI_ISCSI &&
2280             cdev->hwfns[0].pf_params.iscsi_pf_params.ooo_enable)
2281                 qed_ll2_stop_ooo(cdev);
2282
2283         rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev),
2284                                           cdev->ll2->handle);
2285         if (rc)
2286                 DP_INFO(cdev, "Failed to terminate LL2 connection\n");
2287
2288         qed_ll2_kill_buffers(cdev);
2289
2290         qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2291         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2292
2293         return rc;
2294 fail:
2295         return -EINVAL;
2296 }
2297
2298 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb)
2299 {
2300         struct qed_ll2_tx_pkt_info pkt;
2301         const skb_frag_t *frag;
2302         u8 flags = 0, nr_frags;
2303         int rc = -EINVAL, i;
2304         dma_addr_t mapping;
2305         u16 vlan = 0;
2306
2307         if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
2308                 DP_INFO(cdev, "Cannot transmit a checksumed packet\n");
2309                 return -EINVAL;
2310         }
2311
2312         /* Cache number of fragments from SKB since SKB may be freed by
2313          * the completion routine after calling qed_ll2_prepare_tx_packet()
2314          */
2315         nr_frags = skb_shinfo(skb)->nr_frags;
2316
2317         if (1 + nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) {
2318                 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
2319                        1 + nr_frags);
2320                 return -EINVAL;
2321         }
2322
2323         mapping = dma_map_single(&cdev->pdev->dev, skb->data,
2324                                  skb->len, DMA_TO_DEVICE);
2325         if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2326                 DP_NOTICE(cdev, "SKB mapping failed\n");
2327                 return -EINVAL;
2328         }
2329
2330         /* Request HW to calculate IP csum */
2331         if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
2332               ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
2333                 flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT);
2334
2335         if (skb_vlan_tag_present(skb)) {
2336                 vlan = skb_vlan_tag_get(skb);
2337                 flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT);
2338         }
2339
2340         memset(&pkt, 0, sizeof(pkt));
2341         pkt.num_of_bds = 1 + nr_frags;
2342         pkt.vlan = vlan;
2343         pkt.bd_flags = flags;
2344         pkt.tx_dest = QED_LL2_TX_DEST_NW;
2345         pkt.first_frag = mapping;
2346         pkt.first_frag_len = skb->len;
2347         pkt.cookie = skb;
2348
2349         /* qed_ll2_prepare_tx_packet() may actually send the packet if
2350          * there are no fragments in the skb and subsequently the completion
2351          * routine may run and free the SKB, so no dereferencing the SKB
2352          * beyond this point unless skb has any fragments.
2353          */
2354         rc = qed_ll2_prepare_tx_packet(&cdev->hwfns[0], cdev->ll2->handle,
2355                                        &pkt, 1);
2356         if (rc)
2357                 goto err;
2358
2359         for (i = 0; i < nr_frags; i++) {
2360                 frag = &skb_shinfo(skb)->frags[i];
2361
2362                 mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0,
2363                                            skb_frag_size(frag), DMA_TO_DEVICE);
2364
2365                 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2366                         DP_NOTICE(cdev,
2367                                   "Unable to map frag - dropping packet\n");
2368                         rc = -ENOMEM;
2369                         goto err;
2370                 }
2371
2372                 rc = qed_ll2_set_fragment_of_tx_packet(QED_LEADING_HWFN(cdev),
2373                                                        cdev->ll2->handle,
2374                                                        mapping,
2375                                                        skb_frag_size(frag));
2376
2377                 /* if failed not much to do here, partial packet has been posted
2378                  * we can't free memory, will need to wait for completion.
2379                  */
2380                 if (rc)
2381                         goto err2;
2382         }
2383
2384         return 0;
2385
2386 err:
2387         dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE);
2388
2389 err2:
2390         return rc;
2391 }
2392
2393 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats)
2394 {
2395         if (!cdev->ll2)
2396                 return -EINVAL;
2397
2398         return qed_ll2_get_stats(QED_LEADING_HWFN(cdev),
2399                                  cdev->ll2->handle, stats);
2400 }
2401
2402 const struct qed_ll2_ops qed_ll2_ops_pass = {
2403         .start = &qed_ll2_start,
2404         .stop = &qed_ll2_stop,
2405         .start_xmit = &qed_ll2_start_xmit,
2406         .register_cb_ops = &qed_ll2_register_cb_ops,
2407         .get_stats = &qed_ll2_stats,
2408 };
2409
2410 int qed_ll2_alloc_if(struct qed_dev *cdev)
2411 {
2412         cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL);
2413         return cdev->ll2 ? 0 : -ENOMEM;
2414 }
2415
2416 void qed_ll2_dealloc_if(struct qed_dev *cdev)
2417 {
2418         kfree(cdev->ll2);
2419         cdev->ll2 = NULL;
2420 }