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_registered)
  67 #define QED_LL2_TX_REGISTERED(ll2)      ((ll2)->tx_queue.b_cb_registered)
  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 static void qed_ll2b_complete_rx_packet(void *cxt,
 162                                         struct qed_ll2_comp_rx_data *data)
 163 {
 164         struct qed_hwfn *p_hwfn = cxt;
 165         struct qed_ll2_buffer *buffer = data->cookie;
 166         struct qed_dev *cdev = p_hwfn->cdev;
 167         dma_addr_t new_phys_addr;
 168         struct sk_buff *skb;
 169         bool reuse = false;
 170         int rc = -EINVAL;
 171         u8 *new_data;
 172
 173         DP_VERBOSE(p_hwfn,
 174                    (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA),
 175                    "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",
 176                    (u64)data->rx_buf_addr,
 177                    data->u.placement_offset,
 178                    data->length.packet_length,
 179                    data->parse_flags,
 180                    data->vlan, data->opaque_data_0, data->opaque_data_1);
 181
 182         if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) {
 183                 print_hex_dump(KERN_INFO, "",
 184                                DUMP_PREFIX_OFFSET, 16, 1,
 185                                buffer->data, data->length.packet_length, false);
 186         }
 187
 188         /* Determine if data is valid */
 189         if (data->length.packet_length < ETH_HLEN)
 190                 reuse = true;
 191
 192         /* Allocate a replacement for buffer; Reuse upon failure */
 193         if (!reuse)
 194                 rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data,
 195                                           &new_phys_addr);
 196
 197         /* If need to reuse or there's no replacement buffer, repost this */
 198         if (rc)
 199                 goto out_post;
 200         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
 201                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
 202
 203         skb = build_skb(buffer->data, 0);
 204         if (!skb) {
 205                 DP_INFO(cdev, "Failed to build SKB\n");
 206                 kfree(buffer->data);
 207                 goto out_post1;
 208         }
 209
 210         data->u.placement_offset += NET_SKB_PAD;
 211         skb_reserve(skb, data->u.placement_offset);
 212         skb_put(skb, data->length.packet_length);
 213         skb_checksum_none_assert(skb);
 214
 215         /* Get parital ethernet information instead of eth_type_trans(),
 216          * Since we don't have an associated net_device.
 217          */
 218         skb_reset_mac_header(skb);
 219         skb->protocol = eth_hdr(skb)->h_proto;
 220
 221         /* Pass SKB onward */
 222         if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) {
 223                 if (data->vlan)
 224                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 225                                                data->vlan);
 226                 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb,
 227                                       data->opaque_data_0,
 228                                       data->opaque_data_1);
 229         } else {
 230                 DP_VERBOSE(p_hwfn, (NETIF_MSG_RX_STATUS | NETIF_MSG_PKTDATA |
 231                                     QED_MSG_LL2 | QED_MSG_STORAGE),
 232                            "Dropping the packet\n");
 233                 kfree(buffer->data);
 234         }
 235
 236 out_post1:
 237         /* Update Buffer information and update FW producer */
 238         buffer->data = new_data;
 239         buffer->phys_addr = new_phys_addr;
 240
 241 out_post:
 242         rc = qed_ll2_post_rx_buffer(p_hwfn, cdev->ll2->handle,
 243                                     buffer->phys_addr, 0, buffer, 1);
 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         unsigned long flags = 0;
 303         dma_addr_t tx_frag;
 304
 305         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 306         if (!p_ll2_conn)
 307                 return;
 308
 309         p_tx = &p_ll2_conn->tx_queue;
 310
 311         spin_lock_irqsave(&p_tx->lock, flags);
 312         while (!list_empty(&p_tx->active_descq)) {
 313                 p_pkt = list_first_entry(&p_tx->active_descq,
 314                                          struct qed_ll2_tx_packet, list_entry);
 315                 if (!p_pkt)
 316                         break;
 317
 318                 list_del(&p_pkt->list_entry);
 319                 b_last_packet = list_empty(&p_tx->active_descq);
 320                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 321                 spin_unlock_irqrestore(&p_tx->lock, flags);
 322                 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
 323                         struct qed_ooo_buffer *p_buffer;
 324
 325                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 326                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 327                                                 p_buffer);
 328                 } else {
 329                         p_tx->cur_completing_packet = *p_pkt;
 330                         p_tx->cur_completing_bd_idx = 1;
 331                         b_last_frag =
 332                                 p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 333                         tx_frag = p_pkt->bds_set[0].tx_frag;
 334                         p_ll2_conn->cbs.tx_release_cb(p_ll2_conn->cbs.cookie,
 335                                                       p_ll2_conn->my_id,
 336                                                       p_pkt->cookie,
 337                                                       tx_frag,
 338                                                       b_last_frag,
 339                                                       b_last_packet);
 340                 }
 341                 spin_lock_irqsave(&p_tx->lock, flags);
 342         }
 343         spin_unlock_irqrestore(&p_tx->lock, flags);
 344 }
 345
 346 static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 347 {
 348         struct qed_ll2_info *p_ll2_conn = p_cookie;
 349         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 350         u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0;
 351         struct qed_ll2_tx_packet *p_pkt;
 352         bool b_last_frag = false;
 353         unsigned long flags;
 354         int rc = -EINVAL;
 355
 356         spin_lock_irqsave(&p_tx->lock, flags);
 357         if (p_tx->b_completing_packet) {
 358                 rc = -EBUSY;
 359                 goto out;
 360         }
 361
 362         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 363         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 364         while (num_bds) {
 365                 if (list_empty(&p_tx->active_descq))
 366                         goto out;
 367
 368                 p_pkt = list_first_entry(&p_tx->active_descq,
 369                                          struct qed_ll2_tx_packet, list_entry);
 370                 if (!p_pkt)
 371                         goto out;
 372
 373                 p_tx->b_completing_packet = true;
 374                 p_tx->cur_completing_packet = *p_pkt;
 375                 num_bds_in_packet = p_pkt->bd_used;
 376                 list_del(&p_pkt->list_entry);
 377
 378                 if (num_bds < num_bds_in_packet) {
 379                         DP_NOTICE(p_hwfn,
 380                                   "Rest of BDs does not cover whole packet\n");
 381                         goto out;
 382                 }
 383
 384                 num_bds -= num_bds_in_packet;
 385                 p_tx->bds_idx += num_bds_in_packet;
 386                 while (num_bds_in_packet--)
 387                         qed_chain_consume(&p_tx->txq_chain);
 388
 389                 p_tx->cur_completing_bd_idx = 1;
 390                 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 391                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 392
 393                 spin_unlock_irqrestore(&p_tx->lock, flags);
 394
 395                 p_ll2_conn->cbs.tx_comp_cb(p_ll2_conn->cbs.cookie,
 396                                            p_ll2_conn->my_id,
 397                                            p_pkt->cookie,
 398                                            p_pkt->bds_set[0].tx_frag,
 399                                            b_last_frag, !num_bds);
 400
 401                 spin_lock_irqsave(&p_tx->lock, flags);
 402         }
 403
 404         p_tx->b_completing_packet = false;
 405         rc = 0;
 406 out:
 407         spin_unlock_irqrestore(&p_tx->lock, flags);
 408         return rc;
 409 }
 410
 411 static void qed_ll2_rxq_parse_gsi(struct qed_hwfn *p_hwfn,
 412                                   union core_rx_cqe_union *p_cqe,
 413                                   struct qed_ll2_comp_rx_data *data)
 414 {
 415         data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags);
 416         data->length.data_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length);
 417         data->vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan);
 418         data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi);
 419         data->opaque_data_1 = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo);
 420         data->u.data_length_error = p_cqe->rx_cqe_gsi.data_length_error;
 421         data->qp_id = le16_to_cpu(p_cqe->rx_cqe_gsi.qp_id);
 422
 423         data->src_qp = le32_to_cpu(p_cqe->rx_cqe_gsi.src_qp);
 424 }
 425
 426 static void qed_ll2_rxq_parse_reg(struct qed_hwfn *p_hwfn,
 427                                   union core_rx_cqe_union *p_cqe,
 428                                   struct qed_ll2_comp_rx_data *data)
 429 {
 430         data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_fp.parse_flags.flags);
 431         data->err_flags = le16_to_cpu(p_cqe->rx_cqe_fp.err_flags.flags);
 432         data->length.packet_length =
 433             le16_to_cpu(p_cqe->rx_cqe_fp.packet_length);
 434         data->vlan = le16_to_cpu(p_cqe->rx_cqe_fp.vlan);
 435         data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[0]);
 436         data->opaque_data_1 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[1]);
 437         data->u.placement_offset = p_cqe->rx_cqe_fp.placement_offset;
 438 }
 439
 440 static int
 441 qed_ll2_handle_slowpath(struct qed_hwfn *p_hwfn,
 442                         struct qed_ll2_info *p_ll2_conn,
 443                         union core_rx_cqe_union *p_cqe,
 444                         unsigned long *p_lock_flags)
 445 {
 446         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 447         struct core_rx_slow_path_cqe *sp_cqe;
 448
 449         sp_cqe = &p_cqe->rx_cqe_sp;
 450         if (sp_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) {
 451                 DP_NOTICE(p_hwfn,
 452                           "LL2 - unexpected Rx CQE slowpath ramrod_cmd_id:%d\n",
 453                           sp_cqe->ramrod_cmd_id);
 454                 return -EINVAL;
 455         }
 456
 457         if (!p_ll2_conn->cbs.slowpath_cb) {
 458                 DP_NOTICE(p_hwfn,
 459                           "LL2 - received RX_QUEUE_FLUSH but no callback was provided\n");
 460                 return -EINVAL;
 461         }
 462
 463         spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
 464
 465         p_ll2_conn->cbs.slowpath_cb(p_ll2_conn->cbs.cookie,
 466                                     p_ll2_conn->my_id,
 467                                     le32_to_cpu(sp_cqe->opaque_data.data[0]),
 468                                     le32_to_cpu(sp_cqe->opaque_data.data[1]));
 469
 470         spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
 471
 472         return 0;
 473 }
 474
 475 static int
 476 qed_ll2_rxq_handle_completion(struct qed_hwfn *p_hwfn,
 477                               struct qed_ll2_info *p_ll2_conn,
 478                               union core_rx_cqe_union *p_cqe,
 479                               unsigned long *p_lock_flags, bool b_last_cqe)
 480 {
 481         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 482         struct qed_ll2_rx_packet *p_pkt = NULL;
 483         struct qed_ll2_comp_rx_data data;
 484
 485         if (!list_empty(&p_rx->active_descq))
 486                 p_pkt = list_first_entry(&p_rx->active_descq,
 487                                          struct qed_ll2_rx_packet, list_entry);
 488         if (!p_pkt) {
 489                 DP_NOTICE(p_hwfn,
 490                           "[%d] LL2 Rx completion but active_descq is empty\n",
 491                           p_ll2_conn->input.conn_type);
 492
 493                 return -EIO;
 494         }
 495         list_del(&p_pkt->list_entry);
 496
 497         if (p_cqe->rx_cqe_sp.type == CORE_RX_CQE_TYPE_REGULAR)
 498                 qed_ll2_rxq_parse_reg(p_hwfn, p_cqe, &data);
 499         else
 500                 qed_ll2_rxq_parse_gsi(p_hwfn, p_cqe, &data);
 501         if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)
 502                 DP_NOTICE(p_hwfn,
 503                           "Mismatch between active_descq and the LL2 Rx chain\n");
 504
 505         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 506
 507         data.connection_handle = p_ll2_conn->my_id;
 508         data.cookie = p_pkt->cookie;
 509         data.rx_buf_addr = p_pkt->rx_buf_addr;
 510         data.b_last_packet = b_last_cqe;
 511
 512         spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
 513         p_ll2_conn->cbs.rx_comp_cb(p_ll2_conn->cbs.cookie, &data);
 514
 515         spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
 516
 517         return 0;
 518 }
 519
 520 static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie)
 521 {
 522         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)cookie;
 523         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 524         union core_rx_cqe_union *cqe = NULL;
 525         u16 cq_new_idx = 0, cq_old_idx = 0;
 526         unsigned long flags = 0;
 527         int rc = 0;
 528
 529         spin_lock_irqsave(&p_rx->lock, flags);
 530         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 531         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 532
 533         while (cq_new_idx != cq_old_idx) {
 534                 bool b_last_cqe = (cq_new_idx == cq_old_idx);
 535
 536                 cqe =
 537                     (union core_rx_cqe_union *)
 538                     qed_chain_consume(&p_rx->rcq_chain);
 539                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 540
 541                 DP_VERBOSE(p_hwfn,
 542                            QED_MSG_LL2,
 543                            "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n",
 544                            cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type);
 545
 546                 switch (cqe->rx_cqe_sp.type) {
 547                 case CORE_RX_CQE_TYPE_SLOW_PATH:
 548                         rc = qed_ll2_handle_slowpath(p_hwfn, p_ll2_conn,
 549                                                      cqe, &flags);
 550                         break;
 551                 case CORE_RX_CQE_TYPE_GSI_OFFLOAD:
 552                 case CORE_RX_CQE_TYPE_REGULAR:
 553                         rc = qed_ll2_rxq_handle_completion(p_hwfn, p_ll2_conn,
 554                                                            cqe, &flags,
 555                                                            b_last_cqe);
 556                         break;
 557                 default:
 558                         rc = -EIO;
 559                 }
 560         }
 561
 562         spin_unlock_irqrestore(&p_rx->lock, flags);
 563         return rc;
 564 }
 565
 566 static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 567 {
 568         struct qed_ll2_info *p_ll2_conn = NULL;
 569         struct qed_ll2_rx_packet *p_pkt = NULL;
 570         struct qed_ll2_rx_queue *p_rx;
 571         unsigned long flags = 0;
 572
 573         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 574         if (!p_ll2_conn)
 575                 return;
 576
 577         p_rx = &p_ll2_conn->rx_queue;
 578
 579         spin_lock_irqsave(&p_rx->lock, flags);
 580         while (!list_empty(&p_rx->active_descq)) {
 581                 p_pkt = list_first_entry(&p_rx->active_descq,
 582                                          struct qed_ll2_rx_packet, list_entry);
 583                 if (!p_pkt)
 584                         break;
 585                 list_move_tail(&p_pkt->list_entry, &p_rx->free_descq);
 586                 spin_unlock_irqrestore(&p_rx->lock, flags);
 587
 588                 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
 589                         struct qed_ooo_buffer *p_buffer;
 590
 591                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 592                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 593                                                 p_buffer);
 594                 } else {
 595                         dma_addr_t rx_buf_addr = p_pkt->rx_buf_addr;
 596                         void *cookie = p_pkt->cookie;
 597                         bool b_last;
 598
 599                         b_last = list_empty(&p_rx->active_descq);
 600                         p_ll2_conn->cbs.rx_release_cb(p_ll2_conn->cbs.cookie,
 601                                                       p_ll2_conn->my_id,
 602                                                       cookie,
 603                                                       rx_buf_addr, b_last);
 604                 }
 605                 spin_lock_irqsave(&p_rx->lock, flags);
 606         }
 607         spin_unlock_irqrestore(&p_rx->lock, flags);
 608 }
 609
 610 static bool
 611 qed_ll2_lb_rxq_handler_slowpath(struct qed_hwfn *p_hwfn,
 612                                 struct core_rx_slow_path_cqe *p_cqe)
 613 {
 614         struct ooo_opaque *iscsi_ooo;
 615         u32 cid;
 616
 617         if (p_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH)
 618                 return false;
 619
 620         iscsi_ooo = (struct ooo_opaque *)&p_cqe->opaque_data;
 621         if (iscsi_ooo->ooo_opcode != TCP_EVENT_DELETE_ISLES)
 622                 return false;
 623
 624         /* Need to make a flush */
 625         cid = le32_to_cpu(iscsi_ooo->cid);
 626         qed_ooo_release_connection_isles(p_hwfn, p_hwfn->p_ooo_info, cid);
 627
 628         return true;
 629 }
 630
 631 static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn,
 632                                   struct qed_ll2_info *p_ll2_conn)
 633 {
 634         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 635         u16 packet_length = 0, parse_flags = 0, vlan = 0;
 636         struct qed_ll2_rx_packet *p_pkt = NULL;
 637         u32 num_ooo_add_to_peninsula = 0, cid;
 638         union core_rx_cqe_union *cqe = NULL;
 639         u16 cq_new_idx = 0, cq_old_idx = 0;
 640         struct qed_ooo_buffer *p_buffer;
 641         struct ooo_opaque *iscsi_ooo;
 642         u8 placement_offset = 0;
 643         u8 cqe_type;
 644
 645         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 646         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 647         if (cq_new_idx == cq_old_idx)
 648                 return 0;
 649
 650         while (cq_new_idx != cq_old_idx) {
 651                 struct core_rx_fast_path_cqe *p_cqe_fp;
 652
 653                 cqe = qed_chain_consume(&p_rx->rcq_chain);
 654                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 655                 cqe_type = cqe->rx_cqe_sp.type;
 656
 657                 if (cqe_type == CORE_RX_CQE_TYPE_SLOW_PATH)
 658                         if (qed_ll2_lb_rxq_handler_slowpath(p_hwfn,
 659                                                             &cqe->rx_cqe_sp))
 660                                 continue;
 661
 662                 if (cqe_type != CORE_RX_CQE_TYPE_REGULAR) {
 663                         DP_NOTICE(p_hwfn,
 664                                   "Got a non-regular LB LL2 completion [type 0x%02x]\n",
 665                                   cqe_type);
 666                         return -EINVAL;
 667                 }
 668                 p_cqe_fp = &cqe->rx_cqe_fp;
 669
 670                 placement_offset = p_cqe_fp->placement_offset;
 671                 parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags);
 672                 packet_length = le16_to_cpu(p_cqe_fp->packet_length);
 673                 vlan = le16_to_cpu(p_cqe_fp->vlan);
 674                 iscsi_ooo = (struct ooo_opaque *)&p_cqe_fp->opaque_data;
 675                 qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info,
 676                                            iscsi_ooo);
 677                 cid = le32_to_cpu(iscsi_ooo->cid);
 678
 679                 /* Process delete isle first */
 680                 if (iscsi_ooo->drop_size)
 681                         qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid,
 682                                              iscsi_ooo->drop_isle,
 683                                              iscsi_ooo->drop_size);
 684
 685                 if (iscsi_ooo->ooo_opcode == TCP_EVENT_NOP)
 686                         continue;
 687
 688                 /* Now process create/add/join isles */
 689                 if (list_empty(&p_rx->active_descq)) {
 690                         DP_NOTICE(p_hwfn,
 691                                   "LL2 OOO RX chain has no submitted buffers\n"
 692                                   );
 693                         return -EIO;
 694                 }
 695
 696                 p_pkt = list_first_entry(&p_rx->active_descq,
 697                                          struct qed_ll2_rx_packet, list_entry);
 698
 699                 if ((iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE) ||
 700                     (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT) ||
 701                     (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT) ||
 702                     (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_PEN) ||
 703                     (iscsi_ooo->ooo_opcode == TCP_EVENT_JOIN)) {
 704                         if (!p_pkt) {
 705                                 DP_NOTICE(p_hwfn,
 706                                           "LL2 OOO RX packet is not valid\n");
 707                                 return -EIO;
 708                         }
 709                         list_del(&p_pkt->list_entry);
 710                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 711                         p_buffer->packet_length = packet_length;
 712                         p_buffer->parse_flags = parse_flags;
 713                         p_buffer->vlan = vlan;
 714                         p_buffer->placement_offset = placement_offset;
 715                         qed_chain_consume(&p_rx->rxq_chain);
 716                         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 717
 718                         switch (iscsi_ooo->ooo_opcode) {
 719                         case TCP_EVENT_ADD_NEW_ISLE:
 720                                 qed_ooo_add_new_isle(p_hwfn,
 721                                                      p_hwfn->p_ooo_info,
 722                                                      cid,
 723                                                      iscsi_ooo->ooo_isle,
 724                                                      p_buffer);
 725                                 break;
 726                         case TCP_EVENT_ADD_ISLE_RIGHT:
 727                                 qed_ooo_add_new_buffer(p_hwfn,
 728                                                        p_hwfn->p_ooo_info,
 729                                                        cid,
 730                                                        iscsi_ooo->ooo_isle,
 731                                                        p_buffer,
 732                                                        QED_OOO_RIGHT_BUF);
 733                                 break;
 734                         case TCP_EVENT_ADD_ISLE_LEFT:
 735                                 qed_ooo_add_new_buffer(p_hwfn,
 736                                                        p_hwfn->p_ooo_info,
 737                                                        cid,
 738                                                        iscsi_ooo->ooo_isle,
 739                                                        p_buffer,
 740                                                        QED_OOO_LEFT_BUF);
 741                                 break;
 742                         case TCP_EVENT_JOIN:
 743                                 qed_ooo_add_new_buffer(p_hwfn,
 744                                                        p_hwfn->p_ooo_info,
 745                                                        cid,
 746                                                        iscsi_ooo->ooo_isle +
 747                                                        1,
 748                                                        p_buffer,
 749                                                        QED_OOO_LEFT_BUF);
 750                                 qed_ooo_join_isles(p_hwfn,
 751                                                    p_hwfn->p_ooo_info,
 752                                                    cid, iscsi_ooo->ooo_isle);
 753                                 break;
 754                         case TCP_EVENT_ADD_PEN:
 755                                 num_ooo_add_to_peninsula++;
 756                                 qed_ooo_put_ready_buffer(p_hwfn,
 757                                                          p_hwfn->p_ooo_info,
 758                                                          p_buffer, true);
 759                                 break;
 760                         }
 761                 } else {
 762                         DP_NOTICE(p_hwfn,
 763                                   "Unexpected event (%d) TX OOO completion\n",
 764                                   iscsi_ooo->ooo_opcode);
 765                 }
 766         }
 767
 768         return 0;
 769 }
 770
 771 static void
 772 qed_ooo_submit_tx_buffers(struct qed_hwfn *p_hwfn,
 773                           struct qed_ll2_info *p_ll2_conn)
 774 {
 775         struct qed_ll2_tx_pkt_info tx_pkt;
 776         struct qed_ooo_buffer *p_buffer;
 777         u16 l4_hdr_offset_w;
 778         dma_addr_t first_frag;
 779         u8 bd_flags;
 780         int rc;
 781
 782         /* Submit Tx buffers here */
 783         while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn,
 784                                                     p_hwfn->p_ooo_info))) {
 785                 l4_hdr_offset_w = 0;
 786                 bd_flags = 0;
 787
 788                 first_frag = p_buffer->rx_buffer_phys_addr +
 789                              p_buffer->placement_offset;
 790                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_FORCE_VLAN_MODE, 1);
 791                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_L4_PROTOCOL, 1);
 792
 793                 memset(&tx_pkt, 0, sizeof(tx_pkt));
 794                 tx_pkt.num_of_bds = 1;
 795                 tx_pkt.vlan = p_buffer->vlan;
 796                 tx_pkt.bd_flags = bd_flags;
 797                 tx_pkt.l4_hdr_offset_w = l4_hdr_offset_w;
 798                 switch (p_ll2_conn->tx_dest) {
 799                 case CORE_TX_DEST_NW:
 800                         tx_pkt.tx_dest = QED_LL2_TX_DEST_NW;
 801                         break;
 802                 case CORE_TX_DEST_LB:
 803                         tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
 804                         break;
 805                 case CORE_TX_DEST_DROP:
 806                 default:
 807                         tx_pkt.tx_dest = QED_LL2_TX_DEST_DROP;
 808                         break;
 809                 }
 810                 tx_pkt.first_frag = first_frag;
 811                 tx_pkt.first_frag_len = p_buffer->packet_length;
 812                 tx_pkt.cookie = p_buffer;
 813
 814                 rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id,
 815                                                &tx_pkt, true);
 816                 if (rc) {
 817                         qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info,
 818                                                  p_buffer, false);
 819                         break;
 820                 }
 821         }
 822 }
 823
 824 static void
 825 qed_ooo_submit_rx_buffers(struct qed_hwfn *p_hwfn,
 826                           struct qed_ll2_info *p_ll2_conn)
 827 {
 828         struct qed_ooo_buffer *p_buffer;
 829         int rc;
 830
 831         while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
 832                                                    p_hwfn->p_ooo_info))) {
 833                 rc = qed_ll2_post_rx_buffer(p_hwfn,
 834                                             p_ll2_conn->my_id,
 835                                             p_buffer->rx_buffer_phys_addr,
 836                                             0, p_buffer, true);
 837                 if (rc) {
 838                         qed_ooo_put_free_buffer(p_hwfn,
 839                                                 p_hwfn->p_ooo_info, p_buffer);
 840                         break;
 841                 }
 842         }
 843 }
 844
 845 static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 846 {
 847         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
 848         int rc;
 849
 850         if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
 851                 return 0;
 852
 853         rc = qed_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn);
 854         if (rc)
 855                 return rc;
 856
 857         qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
 858         qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
 859
 860         return 0;
 861 }
 862
 863 static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 864 {
 865         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
 866         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 867         struct qed_ll2_tx_packet *p_pkt = NULL;
 868         struct qed_ooo_buffer *p_buffer;
 869         bool b_dont_submit_rx = false;
 870         u16 new_idx = 0, num_bds = 0;
 871         int rc;
 872
 873         if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
 874                 return 0;
 875
 876         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 877         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 878
 879         if (!num_bds)
 880                 return 0;
 881
 882         while (num_bds) {
 883                 if (list_empty(&p_tx->active_descq))
 884                         return -EINVAL;
 885
 886                 p_pkt = list_first_entry(&p_tx->active_descq,
 887                                          struct qed_ll2_tx_packet, list_entry);
 888                 if (!p_pkt)
 889                         return -EINVAL;
 890
 891                 if (p_pkt->bd_used != 1) {
 892                         DP_NOTICE(p_hwfn,
 893                                   "Unexpectedly many BDs(%d) in TX OOO completion\n",
 894                                   p_pkt->bd_used);
 895                         return -EINVAL;
 896                 }
 897
 898                 list_del(&p_pkt->list_entry);
 899
 900                 num_bds--;
 901                 p_tx->bds_idx++;
 902                 qed_chain_consume(&p_tx->txq_chain);
 903
 904                 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 905                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 906
 907                 if (b_dont_submit_rx) {
 908                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 909                                                 p_buffer);
 910                         continue;
 911                 }
 912
 913                 rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id,
 914                                             p_buffer->rx_buffer_phys_addr, 0,
 915                                             p_buffer, true);
 916                 if (rc != 0) {
 917                         qed_ooo_put_free_buffer(p_hwfn,
 918                                                 p_hwfn->p_ooo_info, p_buffer);
 919                         b_dont_submit_rx = true;
 920                 }
 921         }
 922
 923         qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
 924
 925         return 0;
 926 }
 927
 928 static void qed_ll2_stop_ooo(struct qed_hwfn *p_hwfn)
 929 {
 930         u8 *handle = &p_hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
 931
 932         DP_VERBOSE(p_hwfn, (QED_MSG_STORAGE | QED_MSG_LL2),
 933                    "Stopping LL2 OOO queue [%02x]\n", *handle);
 934
 935         qed_ll2_terminate_connection(p_hwfn, *handle);
 936         qed_ll2_release_connection(p_hwfn, *handle);
 937         *handle = QED_LL2_UNUSED_HANDLE;
 938 }
 939
 940 static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn,
 941                                      struct qed_ll2_info *p_ll2_conn,
 942                                      u8 action_on_error)
 943 {
 944         enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
 945         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 946         struct core_rx_start_ramrod_data *p_ramrod = NULL;
 947         struct qed_spq_entry *p_ent = NULL;
 948         struct qed_sp_init_data init_data;
 949         u16 cqe_pbl_size;
 950         int rc = 0;
 951
 952         /* Get SPQ entry */
 953         memset(&init_data, 0, sizeof(init_data));
 954         init_data.cid = p_ll2_conn->cid;
 955         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 956         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 957
 958         rc = qed_sp_init_request(p_hwfn, &p_ent,
 959                                  CORE_RAMROD_RX_QUEUE_START,
 960                                  PROTOCOLID_CORE, &init_data);
 961         if (rc)
 962                 return rc;
 963
 964         p_ramrod = &p_ent->ramrod.core_rx_queue_start;
 965         memset(p_ramrod, 0, sizeof(*p_ramrod));
 966         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
 967         p_ramrod->sb_index = p_rx->rx_sb_index;
 968         p_ramrod->complete_event_flg = 1;
 969
 970         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
 971         DMA_REGPAIR_LE(p_ramrod->bd_base, p_rx->rxq_chain.p_phys_addr);
 972         cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain);
 973         p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size);
 974         DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr,
 975                        qed_chain_get_pbl_phys(&p_rx->rcq_chain));
 976
 977         p_ramrod->drop_ttl0_flg = p_ll2_conn->input.rx_drop_ttl0_flg;
 978         p_ramrod->inner_vlan_stripping_en =
 979                 p_ll2_conn->input.rx_vlan_removal_en;
 980
 981         if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
 982             p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE)
 983                 p_ramrod->report_outer_vlan = 1;
 984         p_ramrod->queue_id = p_ll2_conn->queue_id;
 985         p_ramrod->main_func_queue = p_ll2_conn->main_func_queue ? 1 : 0;
 986
 987         if (test_bit(QED_MF_LL2_NON_UNICAST, &p_hwfn->cdev->mf_bits) &&
 988             p_ramrod->main_func_queue && conn_type != QED_LL2_TYPE_ROCE &&
 989             conn_type != QED_LL2_TYPE_IWARP) {
 990                 p_ramrod->mf_si_bcast_accept_all = 1;
 991                 p_ramrod->mf_si_mcast_accept_all = 1;
 992         } else {
 993                 p_ramrod->mf_si_bcast_accept_all = 0;
 994                 p_ramrod->mf_si_mcast_accept_all = 0;
 995         }
 996
 997         p_ramrod->action_on_error.error_type = action_on_error;
 998         p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
 999         p_ramrod->zero_prod_flg = 1;
1000
1001         return qed_spq_post(p_hwfn, p_ent, NULL);
1002 }
1003
1004 static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
1005                                      struct qed_ll2_info *p_ll2_conn)
1006 {
1007         enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
1008         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1009         struct core_tx_start_ramrod_data *p_ramrod = NULL;
1010         struct qed_spq_entry *p_ent = NULL;
1011         struct qed_sp_init_data init_data;
1012         u16 pq_id = 0, pbl_size;
1013         int rc = -EINVAL;
1014
1015         if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
1016                 return 0;
1017
1018         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
1019                 p_ll2_conn->tx_stats_en = 0;
1020         else
1021                 p_ll2_conn->tx_stats_en = 1;
1022
1023         /* Get SPQ entry */
1024         memset(&init_data, 0, sizeof(init_data));
1025         init_data.cid = p_ll2_conn->cid;
1026         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1027         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1028
1029         rc = qed_sp_init_request(p_hwfn, &p_ent,
1030                                  CORE_RAMROD_TX_QUEUE_START,
1031                                  PROTOCOLID_CORE, &init_data);
1032         if (rc)
1033                 return rc;
1034
1035         p_ramrod = &p_ent->ramrod.core_tx_queue_start;
1036
1037         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
1038         p_ramrod->sb_index = p_tx->tx_sb_index;
1039         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
1040         p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
1041         p_ramrod->stats_id = p_ll2_conn->tx_stats_id;
1042
1043         DMA_REGPAIR_LE(p_ramrod->pbl_base_addr,
1044                        qed_chain_get_pbl_phys(&p_tx->txq_chain));
1045         pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain);
1046         p_ramrod->pbl_size = cpu_to_le16(pbl_size);
1047
1048         switch (p_ll2_conn->input.tx_tc) {
1049         case PURE_LB_TC:
1050                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
1051                 break;
1052         case PKT_LB_TC:
1053                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO);
1054                 break;
1055         default:
1056                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
1057                 break;
1058         }
1059
1060         p_ramrod->qm_pq_id = cpu_to_le16(pq_id);
1061
1062         switch (conn_type) {
1063         case QED_LL2_TYPE_FCOE:
1064                 p_ramrod->conn_type = PROTOCOLID_FCOE;
1065                 break;
1066         case QED_LL2_TYPE_ISCSI:
1067                 p_ramrod->conn_type = PROTOCOLID_ISCSI;
1068                 break;
1069         case QED_LL2_TYPE_ROCE:
1070                 p_ramrod->conn_type = PROTOCOLID_ROCE;
1071                 break;
1072         case QED_LL2_TYPE_IWARP:
1073                 p_ramrod->conn_type = PROTOCOLID_IWARP;
1074                 break;
1075         case QED_LL2_TYPE_OOO:
1076                 if (p_hwfn->hw_info.personality == QED_PCI_ISCSI)
1077                         p_ramrod->conn_type = PROTOCOLID_ISCSI;
1078                 else
1079                         p_ramrod->conn_type = PROTOCOLID_IWARP;
1080                 break;
1081         default:
1082                 p_ramrod->conn_type = PROTOCOLID_ETH;
1083                 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type);
1084         }
1085
1086         p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1087
1088         rc = qed_spq_post(p_hwfn, p_ent, NULL);
1089         if (rc)
1090                 return rc;
1091
1092         rc = qed_db_recovery_add(p_hwfn->cdev, p_tx->doorbell_addr,
1093                                  &p_tx->db_msg, DB_REC_WIDTH_32B,
1094                                  DB_REC_KERNEL);
1095         return rc;
1096 }
1097
1098 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn,
1099                                     struct qed_ll2_info *p_ll2_conn)
1100 {
1101         struct core_rx_stop_ramrod_data *p_ramrod = NULL;
1102         struct qed_spq_entry *p_ent = NULL;
1103         struct qed_sp_init_data init_data;
1104         int rc = -EINVAL;
1105
1106         /* Get SPQ entry */
1107         memset(&init_data, 0, sizeof(init_data));
1108         init_data.cid = p_ll2_conn->cid;
1109         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1110         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1111
1112         rc = qed_sp_init_request(p_hwfn, &p_ent,
1113                                  CORE_RAMROD_RX_QUEUE_STOP,
1114                                  PROTOCOLID_CORE, &init_data);
1115         if (rc)
1116                 return rc;
1117
1118         p_ramrod = &p_ent->ramrod.core_rx_queue_stop;
1119
1120         p_ramrod->complete_event_flg = 1;
1121         p_ramrod->queue_id = p_ll2_conn->queue_id;
1122
1123         return qed_spq_post(p_hwfn, p_ent, NULL);
1124 }
1125
1126 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn,
1127                                     struct qed_ll2_info *p_ll2_conn)
1128 {
1129         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1130         struct qed_spq_entry *p_ent = NULL;
1131         struct qed_sp_init_data init_data;
1132         int rc = -EINVAL;
1133         qed_db_recovery_del(p_hwfn->cdev, p_tx->doorbell_addr, &p_tx->db_msg);
1134
1135         /* Get SPQ entry */
1136         memset(&init_data, 0, sizeof(init_data));
1137         init_data.cid = p_ll2_conn->cid;
1138         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1139         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1140
1141         rc = qed_sp_init_request(p_hwfn, &p_ent,
1142                                  CORE_RAMROD_TX_QUEUE_STOP,
1143                                  PROTOCOLID_CORE, &init_data);
1144         if (rc)
1145                 return rc;
1146
1147         return qed_spq_post(p_hwfn, p_ent, NULL);
1148 }
1149
1150 static int
1151 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
1152                               struct qed_ll2_info *p_ll2_info)
1153 {
1154         struct qed_ll2_rx_packet *p_descq;
1155         u32 capacity;
1156         int rc = 0;
1157
1158         if (!p_ll2_info->input.rx_num_desc)
1159                 goto out;
1160
1161         rc = qed_chain_alloc(p_hwfn->cdev,
1162                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1163                              QED_CHAIN_MODE_NEXT_PTR,
1164                              QED_CHAIN_CNT_TYPE_U16,
1165                              p_ll2_info->input.rx_num_desc,
1166                              sizeof(struct core_rx_bd),
1167                              &p_ll2_info->rx_queue.rxq_chain, NULL);
1168         if (rc) {
1169                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
1170                 goto out;
1171         }
1172
1173         capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
1174         p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet),
1175                           GFP_KERNEL);
1176         if (!p_descq) {
1177                 rc = -ENOMEM;
1178                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n");
1179                 goto out;
1180         }
1181         p_ll2_info->rx_queue.descq_array = p_descq;
1182
1183         rc = qed_chain_alloc(p_hwfn->cdev,
1184                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1185                              QED_CHAIN_MODE_PBL,
1186                              QED_CHAIN_CNT_TYPE_U16,
1187                              p_ll2_info->input.rx_num_desc,
1188                              sizeof(struct core_rx_fast_path_cqe),
1189                              &p_ll2_info->rx_queue.rcq_chain, NULL);
1190         if (rc) {
1191                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
1192                 goto out;
1193         }
1194
1195         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1196                    "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
1197                    p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc);
1198
1199 out:
1200         return rc;
1201 }
1202
1203 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
1204                                          struct qed_ll2_info *p_ll2_info)
1205 {
1206         struct qed_ll2_tx_packet *p_descq;
1207         u32 desc_size;
1208         u32 capacity;
1209         int rc = 0;
1210
1211         if (!p_ll2_info->input.tx_num_desc)
1212                 goto out;
1213
1214         rc = qed_chain_alloc(p_hwfn->cdev,
1215                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1216                              QED_CHAIN_MODE_PBL,
1217                              QED_CHAIN_CNT_TYPE_U16,
1218                              p_ll2_info->input.tx_num_desc,
1219                              sizeof(struct core_tx_bd),
1220                              &p_ll2_info->tx_queue.txq_chain, NULL);
1221         if (rc)
1222                 goto out;
1223
1224         capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
1225         /* First element is part of the packet, rest are flexibly added */
1226         desc_size = (sizeof(*p_descq) +
1227                      (p_ll2_info->input.tx_max_bds_per_packet - 1) *
1228                      sizeof(p_descq->bds_set));
1229
1230         p_descq = kcalloc(capacity, desc_size, GFP_KERNEL);
1231         if (!p_descq) {
1232                 rc = -ENOMEM;
1233                 goto out;
1234         }
1235         p_ll2_info->tx_queue.descq_mem = p_descq;
1236
1237         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1238                    "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
1239                    p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc);
1240
1241 out:
1242         if (rc)
1243                 DP_NOTICE(p_hwfn,
1244                           "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
1245                           p_ll2_info->input.tx_num_desc);
1246         return rc;
1247 }
1248
1249 static int
1250 qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn,
1251                                struct qed_ll2_info *p_ll2_info, u16 mtu)
1252 {
1253         struct qed_ooo_buffer *p_buf = NULL;
1254         void *p_virt;
1255         u16 buf_idx;
1256         int rc = 0;
1257
1258         if (p_ll2_info->input.conn_type != QED_LL2_TYPE_OOO)
1259                 return rc;
1260
1261         /* Correct number of requested OOO buffers if needed */
1262         if (!p_ll2_info->input.rx_num_ooo_buffers) {
1263                 u16 num_desc = p_ll2_info->input.rx_num_desc;
1264
1265                 if (!num_desc)
1266                         return -EINVAL;
1267                 p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2;
1268         }
1269
1270         for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers;
1271              buf_idx++) {
1272                 p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL);
1273                 if (!p_buf) {
1274                         rc = -ENOMEM;
1275                         goto out;
1276                 }
1277
1278                 p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE;
1279                 p_buf->rx_buffer_size = (p_buf->rx_buffer_size +
1280                                          ETH_CACHE_LINE_SIZE - 1) &
1281                                         ~(ETH_CACHE_LINE_SIZE - 1);
1282                 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
1283                                             p_buf->rx_buffer_size,
1284                                             &p_buf->rx_buffer_phys_addr,
1285                                             GFP_KERNEL);
1286                 if (!p_virt) {
1287                         kfree(p_buf);
1288                         rc = -ENOMEM;
1289                         goto out;
1290                 }
1291
1292                 p_buf->rx_buffer_virt_addr = p_virt;
1293                 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf);
1294         }
1295
1296         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1297                    "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n",
1298                    p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size);
1299
1300 out:
1301         return rc;
1302 }
1303
1304 static int
1305 qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs)
1306 {
1307         if (!cbs || (!cbs->rx_comp_cb ||
1308                      !cbs->rx_release_cb ||
1309                      !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie))
1310                 return -EINVAL;
1311
1312         p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb;
1313         p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb;
1314         p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb;
1315         p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb;
1316         p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb;
1317         p_ll2_info->cbs.cookie = cbs->cookie;
1318
1319         return 0;
1320 }
1321
1322 static void _qed_ll2_calc_allowed_conns(struct qed_hwfn *p_hwfn,
1323                                         struct qed_ll2_acquire_data *data,
1324                                         u8 *start_idx, u8 *last_idx)
1325 {
1326         /* LL2 queues handles will be split as follows:
1327          * First will be the legacy queues, and then the ctx based.
1328          */
1329         if (data->input.rx_conn_type == QED_LL2_RX_TYPE_LEGACY) {
1330                 *start_idx = QED_LL2_LEGACY_CONN_BASE_PF;
1331                 *last_idx = *start_idx +
1332                         QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF;
1333         } else {
1334                 /* QED_LL2_RX_TYPE_CTX */
1335                 *start_idx = QED_LL2_CTX_CONN_BASE_PF;
1336                 *last_idx = *start_idx +
1337                         QED_MAX_NUM_OF_CTX_LL2_CONNS_PF;
1338         }
1339 }
1340
1341 static enum core_error_handle
1342 qed_ll2_get_error_choice(enum qed_ll2_error_handle err)
1343 {
1344         switch (err) {
1345         case QED_LL2_DROP_PACKET:
1346                 return LL2_DROP_PACKET;
1347         case QED_LL2_DO_NOTHING:
1348                 return LL2_DO_NOTHING;
1349         case QED_LL2_ASSERT:
1350                 return LL2_ASSERT;
1351         default:
1352                 return LL2_DO_NOTHING;
1353         }
1354 }
1355
1356 int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data)
1357 {
1358         struct qed_hwfn *p_hwfn = cxt;
1359         qed_int_comp_cb_t comp_rx_cb, comp_tx_cb;
1360         struct qed_ll2_info *p_ll2_info = NULL;
1361         u8 i, first_idx, last_idx, *p_tx_max;
1362         int rc;
1363
1364         if (!data->p_connection_handle || !p_hwfn->p_ll2_info)
1365                 return -EINVAL;
1366
1367         _qed_ll2_calc_allowed_conns(p_hwfn, data, &first_idx, &last_idx);
1368
1369         /* Find a free connection to be used */
1370         for (i = first_idx; i < last_idx; i++) {
1371                 mutex_lock(&p_hwfn->p_ll2_info[i].mutex);
1372                 if (p_hwfn->p_ll2_info[i].b_active) {
1373                         mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1374                         continue;
1375                 }
1376
1377                 p_hwfn->p_ll2_info[i].b_active = true;
1378                 p_ll2_info = &p_hwfn->p_ll2_info[i];
1379                 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1380                 break;
1381         }
1382         if (!p_ll2_info)
1383                 return -EBUSY;
1384
1385         memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input));
1386
1387         switch (data->input.tx_dest) {
1388         case QED_LL2_TX_DEST_NW:
1389                 p_ll2_info->tx_dest = CORE_TX_DEST_NW;
1390                 break;
1391         case QED_LL2_TX_DEST_LB:
1392                 p_ll2_info->tx_dest = CORE_TX_DEST_LB;
1393                 break;
1394         case QED_LL2_TX_DEST_DROP:
1395                 p_ll2_info->tx_dest = CORE_TX_DEST_DROP;
1396                 break;
1397         default:
1398                 return -EINVAL;
1399         }
1400
1401         if (data->input.conn_type == QED_LL2_TYPE_OOO ||
1402             data->input.secondary_queue)
1403                 p_ll2_info->main_func_queue = false;
1404         else
1405                 p_ll2_info->main_func_queue = true;
1406
1407         /* Correct maximum number of Tx BDs */
1408         p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet;
1409         if (*p_tx_max == 0)
1410                 *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET;
1411         else
1412                 *p_tx_max = min_t(u8, *p_tx_max,
1413                                   CORE_LL2_TX_MAX_BDS_PER_PACKET);
1414
1415         rc = qed_ll2_set_cbs(p_ll2_info, data->cbs);
1416         if (rc) {
1417                 DP_NOTICE(p_hwfn, "Invalid callback functions\n");
1418                 goto q_allocate_fail;
1419         }
1420
1421         rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info);
1422         if (rc)
1423                 goto q_allocate_fail;
1424
1425         rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info);
1426         if (rc)
1427                 goto q_allocate_fail;
1428
1429         rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info,
1430                                             data->input.mtu);
1431         if (rc)
1432                 goto q_allocate_fail;
1433
1434         /* Register callbacks for the Rx/Tx queues */
1435         if (data->input.conn_type == QED_LL2_TYPE_OOO) {
1436                 comp_rx_cb = qed_ll2_lb_rxq_completion;
1437                 comp_tx_cb = qed_ll2_lb_txq_completion;
1438         } else {
1439                 comp_rx_cb = qed_ll2_rxq_completion;
1440                 comp_tx_cb = qed_ll2_txq_completion;
1441         }
1442
1443         if (data->input.rx_num_desc) {
1444                 qed_int_register_cb(p_hwfn, comp_rx_cb,
1445                                     &p_hwfn->p_ll2_info[i],
1446                                     &p_ll2_info->rx_queue.rx_sb_index,
1447                                     &p_ll2_info->rx_queue.p_fw_cons);
1448                 p_ll2_info->rx_queue.b_cb_registered = true;
1449         }
1450
1451         if (data->input.tx_num_desc) {
1452                 qed_int_register_cb(p_hwfn,
1453                                     comp_tx_cb,
1454                                     &p_hwfn->p_ll2_info[i],
1455                                     &p_ll2_info->tx_queue.tx_sb_index,
1456                                     &p_ll2_info->tx_queue.p_fw_cons);
1457                 p_ll2_info->tx_queue.b_cb_registered = true;
1458         }
1459
1460         *data->p_connection_handle = i;
1461         return rc;
1462
1463 q_allocate_fail:
1464         qed_ll2_release_connection(p_hwfn, i);
1465         return -ENOMEM;
1466 }
1467
1468 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn,
1469                                            struct qed_ll2_info *p_ll2_conn)
1470 {
1471         enum qed_ll2_error_handle error_input;
1472         enum core_error_handle error_mode;
1473         u8 action_on_error = 0;
1474         int rc;
1475
1476         if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
1477                 return 0;
1478
1479         DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0);
1480         error_input = p_ll2_conn->input.ai_err_packet_too_big;
1481         error_mode = qed_ll2_get_error_choice(error_input);
1482         SET_FIELD(action_on_error,
1483                   CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode);
1484         error_input = p_ll2_conn->input.ai_err_no_buf;
1485         error_mode = qed_ll2_get_error_choice(error_input);
1486         SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode);
1487
1488         rc = qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
1489         if (rc)
1490                 return rc;
1491
1492         if (p_ll2_conn->rx_queue.ctx_based) {
1493                 rc = qed_db_recovery_add(p_hwfn->cdev,
1494                                          p_ll2_conn->rx_queue.set_prod_addr,
1495                                          &p_ll2_conn->rx_queue.db_data,
1496                                          DB_REC_WIDTH_64B, DB_REC_KERNEL);
1497         }
1498
1499         return rc;
1500 }
1501
1502 static void
1503 qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn,
1504                                  struct qed_ll2_info *p_ll2_conn)
1505 {
1506         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
1507                 return;
1508
1509         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1510         qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
1511 }
1512
1513 static inline u8 qed_ll2_handle_to_queue_id(struct qed_hwfn *p_hwfn,
1514                                             u8 handle,
1515                                             u8 ll2_queue_type)
1516 {
1517         u8 qid;
1518
1519         if (ll2_queue_type == QED_LL2_RX_TYPE_LEGACY)
1520                 return p_hwfn->hw_info.resc_start[QED_LL2_RAM_QUEUE] + handle;
1521
1522         /* QED_LL2_RX_TYPE_CTX
1523          * FW distinguishes between the legacy queues (ram based) and the
1524          * ctx based queues by the queue_id.
1525          * The first MAX_NUM_LL2_RX_RAM_QUEUES queues are legacy
1526          * and the queue ids above that are ctx base.
1527          */
1528         qid = p_hwfn->hw_info.resc_start[QED_LL2_CTX_QUEUE] +
1529               MAX_NUM_LL2_RX_RAM_QUEUES;
1530
1531         /* See comment on the acquire connection for how the ll2
1532          * queues handles are divided.
1533          */
1534         qid += (handle - QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF);
1535
1536         return qid;
1537 }
1538
1539 int qed_ll2_establish_connection(void *cxt, u8 connection_handle)
1540 {
1541         struct e4_core_conn_context *p_cxt;
1542         struct qed_ll2_tx_packet *p_pkt;
1543         struct qed_ll2_info *p_ll2_conn;
1544         struct qed_hwfn *p_hwfn = cxt;
1545         struct qed_ll2_rx_queue *p_rx;
1546         struct qed_ll2_tx_queue *p_tx;
1547         struct qed_cxt_info cxt_info;
1548         struct qed_ptt *p_ptt;
1549         int rc = -EINVAL;
1550         u32 i, capacity;
1551         u32 desc_size;
1552         u8 qid;
1553
1554         p_ptt = qed_ptt_acquire(p_hwfn);
1555         if (!p_ptt)
1556                 return -EAGAIN;
1557
1558         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1559         if (!p_ll2_conn) {
1560                 rc = -EINVAL;
1561                 goto out;
1562         }
1563
1564         p_rx = &p_ll2_conn->rx_queue;
1565         p_tx = &p_ll2_conn->tx_queue;
1566
1567         qed_chain_reset(&p_rx->rxq_chain);
1568         qed_chain_reset(&p_rx->rcq_chain);
1569         INIT_LIST_HEAD(&p_rx->active_descq);
1570         INIT_LIST_HEAD(&p_rx->free_descq);
1571         INIT_LIST_HEAD(&p_rx->posting_descq);
1572         spin_lock_init(&p_rx->lock);
1573         capacity = qed_chain_get_capacity(&p_rx->rxq_chain);
1574         for (i = 0; i < capacity; i++)
1575                 list_add_tail(&p_rx->descq_array[i].list_entry,
1576                               &p_rx->free_descq);
1577         *p_rx->p_fw_cons = 0;
1578
1579         qed_chain_reset(&p_tx->txq_chain);
1580         INIT_LIST_HEAD(&p_tx->active_descq);
1581         INIT_LIST_HEAD(&p_tx->free_descq);
1582         INIT_LIST_HEAD(&p_tx->sending_descq);
1583         spin_lock_init(&p_tx->lock);
1584         capacity = qed_chain_get_capacity(&p_tx->txq_chain);
1585         /* First element is part of the packet, rest are flexibly added */
1586         desc_size = (sizeof(*p_pkt) +
1587                      (p_ll2_conn->input.tx_max_bds_per_packet - 1) *
1588                      sizeof(p_pkt->bds_set));
1589
1590         for (i = 0; i < capacity; i++) {
1591                 p_pkt = p_tx->descq_mem + desc_size * i;
1592                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
1593         }
1594         p_tx->cur_completing_bd_idx = 0;
1595         p_tx->bds_idx = 0;
1596         p_tx->b_completing_packet = false;
1597         p_tx->cur_send_packet = NULL;
1598         p_tx->cur_send_frag_num = 0;
1599         p_tx->cur_completing_frag_num = 0;
1600         *p_tx->p_fw_cons = 0;
1601
1602         rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
1603         if (rc)
1604                 goto out;
1605         cxt_info.iid = p_ll2_conn->cid;
1606         rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info);
1607         if (rc) {
1608                 DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n",
1609                           p_ll2_conn->cid);
1610                 goto out;
1611         }
1612
1613         p_cxt = cxt_info.p_cxt;
1614
1615         memset(p_cxt, 0, sizeof(*p_cxt));
1616
1617         qid = qed_ll2_handle_to_queue_id(p_hwfn, connection_handle,
1618                                          p_ll2_conn->input.rx_conn_type);
1619         p_ll2_conn->queue_id = qid;
1620         p_ll2_conn->tx_stats_id = qid;
1621
1622         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1623                    "Establishing ll2 queue. PF %d ctx_based=%d abs qid=%d\n",
1624                    p_hwfn->rel_pf_id, p_ll2_conn->input.rx_conn_type, qid);
1625
1626         if (p_ll2_conn->input.rx_conn_type == QED_LL2_RX_TYPE_LEGACY) {
1627                 p_rx->set_prod_addr = p_hwfn->regview +
1628                     GTT_BAR0_MAP_REG_TSDM_RAM + TSTORM_LL2_RX_PRODS_OFFSET(qid);
1629         } else {
1630                 /* QED_LL2_RX_TYPE_CTX - using doorbell */
1631                 p_rx->ctx_based = 1;
1632
1633                 p_rx->set_prod_addr = p_hwfn->doorbells +
1634                         p_hwfn->dpi_start_offset +
1635                         DB_ADDR_SHIFT(DQ_PWM_OFFSET_TCM_LL2_PROD_UPDATE);
1636
1637                 /* prepare db data */
1638                 p_rx->db_data.icid = cpu_to_le16((u16)p_ll2_conn->cid);
1639                 SET_FIELD(p_rx->db_data.params,
1640                           CORE_PWM_PROD_UPDATE_DATA_AGG_CMD, DB_AGG_CMD_SET);
1641                 SET_FIELD(p_rx->db_data.params,
1642                           CORE_PWM_PROD_UPDATE_DATA_RESERVED1, 0);
1643         }
1644
1645         p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells +
1646                                             qed_db_addr(p_ll2_conn->cid,
1647                                                         DQ_DEMS_LEGACY);
1648         /* prepare db data */
1649         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
1650         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
1651         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
1652                   DQ_XCM_CORE_TX_BD_PROD_CMD);
1653         p_tx->db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
1654
1655         rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
1656         if (rc)
1657                 goto out;
1658
1659         rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
1660         if (rc)
1661                 goto out;
1662
1663         if (!QED_IS_RDMA_PERSONALITY(p_hwfn))
1664                 qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1);
1665
1666         qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn);
1667
1668         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1669                 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
1670                         qed_llh_add_protocol_filter(p_hwfn->cdev, 0,
1671                                                     QED_LLH_FILTER_ETHERTYPE,
1672                                                     ETH_P_FCOE, 0);
1673                 qed_llh_add_protocol_filter(p_hwfn->cdev, 0,
1674                                             QED_LLH_FILTER_ETHERTYPE,
1675                                             ETH_P_FIP, 0);
1676         }
1677
1678 out:
1679         qed_ptt_release(p_hwfn, p_ptt);
1680         return rc;
1681 }
1682
1683 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn,
1684                                              struct qed_ll2_rx_queue *p_rx,
1685                                              struct qed_ll2_rx_packet *p_curp)
1686 {
1687         struct qed_ll2_rx_packet *p_posting_packet = NULL;
1688         struct core_ll2_rx_prod rx_prod = { 0, 0 };
1689         bool b_notify_fw = false;
1690         u16 bd_prod, cq_prod;
1691
1692         /* This handles the flushing of already posted buffers */
1693         while (!list_empty(&p_rx->posting_descq)) {
1694                 p_posting_packet = list_first_entry(&p_rx->posting_descq,
1695                                                     struct qed_ll2_rx_packet,
1696                                                     list_entry);
1697                 list_move_tail(&p_posting_packet->list_entry,
1698                                &p_rx->active_descq);
1699                 b_notify_fw = true;
1700         }
1701
1702         /* This handles the supplied packet [if there is one] */
1703         if (p_curp) {
1704                 list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
1705                 b_notify_fw = true;
1706         }
1707
1708         if (!b_notify_fw)
1709                 return;
1710
1711         bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
1712         cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
1713         if (p_rx->ctx_based) {
1714                 /* update producer by giving a doorbell */
1715                 p_rx->db_data.prod.bd_prod = cpu_to_le16(bd_prod);
1716                 p_rx->db_data.prod.cqe_prod = cpu_to_le16(cq_prod);
1717                 /* Make sure chain element is updated before ringing the
1718                  * doorbell
1719                  */
1720                 dma_wmb();
1721                 DIRECT_REG_WR64(p_rx->set_prod_addr,
1722                                 *((u64 *)&p_rx->db_data));
1723         } else {
1724                 rx_prod.bd_prod = cpu_to_le16(bd_prod);
1725                 rx_prod.cqe_prod = cpu_to_le16(cq_prod);
1726
1727                 /* Make sure chain element is updated before ringing the
1728                  * doorbell
1729                  */
1730                 dma_wmb();
1731
1732                 DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
1733         }
1734 }
1735
1736 int qed_ll2_post_rx_buffer(void *cxt,
1737                            u8 connection_handle,
1738                            dma_addr_t addr,
1739                            u16 buf_len, void *cookie, u8 notify_fw)
1740 {
1741         struct qed_hwfn *p_hwfn = cxt;
1742         struct core_rx_bd_with_buff_len *p_curb = NULL;
1743         struct qed_ll2_rx_packet *p_curp = NULL;
1744         struct qed_ll2_info *p_ll2_conn;
1745         struct qed_ll2_rx_queue *p_rx;
1746         unsigned long flags;
1747         void *p_data;
1748         int rc = 0;
1749
1750         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1751         if (!p_ll2_conn)
1752                 return -EINVAL;
1753         p_rx = &p_ll2_conn->rx_queue;
1754
1755         spin_lock_irqsave(&p_rx->lock, flags);
1756         if (!list_empty(&p_rx->free_descq))
1757                 p_curp = list_first_entry(&p_rx->free_descq,
1758                                           struct qed_ll2_rx_packet, list_entry);
1759         if (p_curp) {
1760                 if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
1761                     qed_chain_get_elem_left(&p_rx->rcq_chain)) {
1762                         p_data = qed_chain_produce(&p_rx->rxq_chain);
1763                         p_curb = (struct core_rx_bd_with_buff_len *)p_data;
1764                         qed_chain_produce(&p_rx->rcq_chain);
1765                 }
1766         }
1767
1768         /* If we're lacking entires, let's try to flush buffers to FW */
1769         if (!p_curp || !p_curb) {
1770                 rc = -EBUSY;
1771                 p_curp = NULL;
1772                 goto out_notify;
1773         }
1774
1775         /* We have an Rx packet we can fill */
1776         DMA_REGPAIR_LE(p_curb->addr, addr);
1777         p_curb->buff_length = cpu_to_le16(buf_len);
1778         p_curp->rx_buf_addr = addr;
1779         p_curp->cookie = cookie;
1780         p_curp->rxq_bd = p_curb;
1781         p_curp->buf_length = buf_len;
1782         list_del(&p_curp->list_entry);
1783
1784         /* Check if we only want to enqueue this packet without informing FW */
1785         if (!notify_fw) {
1786                 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
1787                 goto out;
1788         }
1789
1790 out_notify:
1791         qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
1792 out:
1793         spin_unlock_irqrestore(&p_rx->lock, flags);
1794         return rc;
1795 }
1796
1797 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
1798                                           struct qed_ll2_tx_queue *p_tx,
1799                                           struct qed_ll2_tx_packet *p_curp,
1800                                           struct qed_ll2_tx_pkt_info *pkt,
1801                                           u8 notify_fw)
1802 {
1803         list_del(&p_curp->list_entry);
1804         p_curp->cookie = pkt->cookie;
1805         p_curp->bd_used = pkt->num_of_bds;
1806         p_curp->notify_fw = notify_fw;
1807         p_tx->cur_send_packet = p_curp;
1808         p_tx->cur_send_frag_num = 0;
1809
1810         p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag;
1811         p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len;
1812         p_tx->cur_send_frag_num++;
1813 }
1814
1815 static void
1816 qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
1817                                  struct qed_ll2_info *p_ll2,
1818                                  struct qed_ll2_tx_packet *p_curp,
1819                                  struct qed_ll2_tx_pkt_info *pkt)
1820 {
1821         struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
1822         u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
1823         struct core_tx_bd *start_bd = NULL;
1824         enum core_roce_flavor_type roce_flavor;
1825         enum core_tx_dest tx_dest;
1826         u16 bd_data = 0, frag_idx;
1827
1828         roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE
1829                                                              : CORE_RROCE;
1830
1831         switch (pkt->tx_dest) {
1832         case QED_LL2_TX_DEST_NW:
1833                 tx_dest = CORE_TX_DEST_NW;
1834                 break;
1835         case QED_LL2_TX_DEST_LB:
1836                 tx_dest = CORE_TX_DEST_LB;
1837                 break;
1838         case QED_LL2_TX_DEST_DROP:
1839                 tx_dest = CORE_TX_DEST_DROP;
1840                 break;
1841         default:
1842                 tx_dest = CORE_TX_DEST_LB;
1843                 break;
1844         }
1845
1846         start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1847         if (QED_IS_IWARP_PERSONALITY(p_hwfn) &&
1848             p_ll2->input.conn_type == QED_LL2_TYPE_OOO) {
1849                 start_bd->nw_vlan_or_lb_echo =
1850                     cpu_to_le16(IWARP_LL2_IN_ORDER_TX_QUEUE);
1851         } else {
1852                 start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan);
1853                 if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
1854                     p_ll2->input.conn_type == QED_LL2_TYPE_FCOE)
1855                         pkt->remove_stag = true;
1856         }
1857
1858         SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W,
1859                   cpu_to_le16(pkt->l4_hdr_offset_w));
1860         SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest);
1861         bd_data |= pkt->bd_flags;
1862         SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1);
1863         SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds);
1864         SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor);
1865         SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_CSUM, !!(pkt->enable_ip_cksum));
1866         SET_FIELD(bd_data, CORE_TX_BD_DATA_L4_CSUM, !!(pkt->enable_l4_cksum));
1867         SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_LEN, !!(pkt->calc_ip_len));
1868         SET_FIELD(bd_data, CORE_TX_BD_DATA_DISABLE_STAG_INSERTION,
1869                   !!(pkt->remove_stag));
1870
1871         start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data);
1872         DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag);
1873         start_bd->nbytes = cpu_to_le16(pkt->first_frag_len);
1874
1875         DP_VERBOSE(p_hwfn,
1876                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1877                    "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",
1878                    p_ll2->queue_id,
1879                    p_ll2->cid,
1880                    p_ll2->input.conn_type,
1881                    prod_idx,
1882                    pkt->first_frag_len,
1883                    pkt->num_of_bds,
1884                    le32_to_cpu(start_bd->addr.hi),
1885                    le32_to_cpu(start_bd->addr.lo));
1886
1887         if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds)
1888                 return;
1889
1890         /* Need to provide the packet with additional BDs for frags */
1891         for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
1892              frag_idx < pkt->num_of_bds; frag_idx++) {
1893                 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
1894
1895                 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1896                 (*p_bd)->bd_data.as_bitfield = 0;
1897                 (*p_bd)->bitfield1 = 0;
1898                 p_curp->bds_set[frag_idx].tx_frag = 0;
1899                 p_curp->bds_set[frag_idx].frag_len = 0;
1900         }
1901 }
1902
1903 /* This should be called while the Txq spinlock is being held */
1904 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
1905                                      struct qed_ll2_info *p_ll2_conn)
1906 {
1907         bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
1908         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1909         struct qed_ll2_tx_packet *p_pkt = NULL;
1910         u16 bd_prod;
1911
1912         /* If there are missing BDs, don't do anything now */
1913         if (p_ll2_conn->tx_queue.cur_send_frag_num !=
1914             p_ll2_conn->tx_queue.cur_send_packet->bd_used)
1915                 return;
1916
1917         /* Push the current packet to the list and clean after it */
1918         list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
1919                       &p_ll2_conn->tx_queue.sending_descq);
1920         p_ll2_conn->tx_queue.cur_send_packet = NULL;
1921         p_ll2_conn->tx_queue.cur_send_frag_num = 0;
1922
1923         /* Notify FW of packet only if requested to */
1924         if (!b_notify)
1925                 return;
1926
1927         bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
1928
1929         while (!list_empty(&p_tx->sending_descq)) {
1930                 p_pkt = list_first_entry(&p_tx->sending_descq,
1931                                          struct qed_ll2_tx_packet, list_entry);
1932                 if (!p_pkt)
1933                         break;
1934
1935                 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq);
1936         }
1937
1938         p_tx->db_msg.spq_prod = cpu_to_le16(bd_prod);
1939
1940         /* Make sure the BDs data is updated before ringing the doorbell */
1941         wmb();
1942
1943         DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&p_tx->db_msg));
1944
1945         DP_VERBOSE(p_hwfn,
1946                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1947                    "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
1948                    p_ll2_conn->queue_id,
1949                    p_ll2_conn->cid,
1950                    p_ll2_conn->input.conn_type, p_tx->db_msg.spq_prod);
1951 }
1952
1953 int qed_ll2_prepare_tx_packet(void *cxt,
1954                               u8 connection_handle,
1955                               struct qed_ll2_tx_pkt_info *pkt,
1956                               bool notify_fw)
1957 {
1958         struct qed_hwfn *p_hwfn = cxt;
1959         struct qed_ll2_tx_packet *p_curp = NULL;
1960         struct qed_ll2_info *p_ll2_conn = NULL;
1961         struct qed_ll2_tx_queue *p_tx;
1962         struct qed_chain *p_tx_chain;
1963         unsigned long flags;
1964         int rc = 0;
1965
1966         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1967         if (!p_ll2_conn)
1968                 return -EINVAL;
1969         p_tx = &p_ll2_conn->tx_queue;
1970         p_tx_chain = &p_tx->txq_chain;
1971
1972         if (pkt->num_of_bds > p_ll2_conn->input.tx_max_bds_per_packet)
1973                 return -EIO;
1974
1975         spin_lock_irqsave(&p_tx->lock, flags);
1976         if (p_tx->cur_send_packet) {
1977                 rc = -EEXIST;
1978                 goto out;
1979         }
1980
1981         /* Get entry, but only if we have tx elements for it */
1982         if (!list_empty(&p_tx->free_descq))
1983                 p_curp = list_first_entry(&p_tx->free_descq,
1984                                           struct qed_ll2_tx_packet, list_entry);
1985         if (p_curp && qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds)
1986                 p_curp = NULL;
1987
1988         if (!p_curp) {
1989                 rc = -EBUSY;
1990                 goto out;
1991         }
1992
1993         /* Prepare packet and BD, and perhaps send a doorbell to FW */
1994         qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw);
1995
1996         qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt);
1997
1998         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1999
2000 out:
2001         spin_unlock_irqrestore(&p_tx->lock, flags);
2002         return rc;
2003 }
2004
2005 int qed_ll2_set_fragment_of_tx_packet(void *cxt,
2006                                       u8 connection_handle,
2007                                       dma_addr_t addr, u16 nbytes)
2008 {
2009         struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
2010         struct qed_hwfn *p_hwfn = cxt;
2011         struct qed_ll2_info *p_ll2_conn = NULL;
2012         u16 cur_send_frag_num = 0;
2013         struct core_tx_bd *p_bd;
2014         unsigned long flags;
2015
2016         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2017         if (!p_ll2_conn)
2018                 return -EINVAL;
2019
2020         if (!p_ll2_conn->tx_queue.cur_send_packet)
2021                 return -EINVAL;
2022
2023         p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
2024         cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
2025
2026         if (cur_send_frag_num >= p_cur_send_packet->bd_used)
2027                 return -EINVAL;
2028
2029         /* Fill the BD information, and possibly notify FW */
2030         p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
2031         DMA_REGPAIR_LE(p_bd->addr, addr);
2032         p_bd->nbytes = cpu_to_le16(nbytes);
2033         p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
2034         p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
2035
2036         p_ll2_conn->tx_queue.cur_send_frag_num++;
2037
2038         spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
2039         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
2040         spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
2041
2042         return 0;
2043 }
2044
2045 int qed_ll2_terminate_connection(void *cxt, u8 connection_handle)
2046 {
2047         struct qed_hwfn *p_hwfn = cxt;
2048         struct qed_ll2_info *p_ll2_conn = NULL;
2049         int rc = -EINVAL;
2050         struct qed_ptt *p_ptt;
2051
2052         p_ptt = qed_ptt_acquire(p_hwfn);
2053         if (!p_ptt)
2054                 return -EAGAIN;
2055
2056         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
2057         if (!p_ll2_conn) {
2058                 rc = -EINVAL;
2059                 goto out;
2060         }
2061
2062         /* Stop Tx & Rx of connection, if needed */
2063         if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
2064                 p_ll2_conn->tx_queue.b_cb_registered = false;
2065                 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
2066                 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
2067                 if (rc)
2068                         goto out;
2069
2070                 qed_ll2_txq_flush(p_hwfn, connection_handle);
2071                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
2072         }
2073
2074         if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
2075                 p_ll2_conn->rx_queue.b_cb_registered = false;
2076                 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
2077
2078                 if (p_ll2_conn->rx_queue.ctx_based)
2079                         qed_db_recovery_del(p_hwfn->cdev,
2080                                             p_ll2_conn->rx_queue.set_prod_addr,
2081                                             &p_ll2_conn->rx_queue.db_data);
2082
2083                 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
2084                 if (rc)
2085                         goto out;
2086
2087                 qed_ll2_rxq_flush(p_hwfn, connection_handle);
2088                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
2089         }
2090
2091         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
2092                 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
2093
2094         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
2095                 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
2096                         qed_llh_remove_protocol_filter(p_hwfn->cdev, 0,
2097                                                        QED_LLH_FILTER_ETHERTYPE,
2098                                                        ETH_P_FCOE, 0);
2099                 qed_llh_remove_protocol_filter(p_hwfn->cdev, 0,
2100                                                QED_LLH_FILTER_ETHERTYPE,
2101                                                ETH_P_FIP, 0);
2102         }
2103
2104 out:
2105         qed_ptt_release(p_hwfn, p_ptt);
2106         return rc;
2107 }
2108
2109 static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn,
2110                                            struct qed_ll2_info *p_ll2_conn)
2111 {
2112         struct qed_ooo_buffer *p_buffer;
2113
2114         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
2115                 return;
2116
2117         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
2118         while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
2119                                                    p_hwfn->p_ooo_info))) {
2120                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
2121                                   p_buffer->rx_buffer_size,
2122                                   p_buffer->rx_buffer_virt_addr,
2123                                   p_buffer->rx_buffer_phys_addr);
2124                 kfree(p_buffer);
2125         }
2126 }
2127
2128 void qed_ll2_release_connection(void *cxt, u8 connection_handle)
2129 {
2130         struct qed_hwfn *p_hwfn = cxt;
2131         struct qed_ll2_info *p_ll2_conn = NULL;
2132
2133         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2134         if (!p_ll2_conn)
2135                 return;
2136
2137         kfree(p_ll2_conn->tx_queue.descq_mem);
2138         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
2139
2140         kfree(p_ll2_conn->rx_queue.descq_array);
2141         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
2142         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
2143
2144         qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
2145
2146         qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn);
2147
2148         mutex_lock(&p_ll2_conn->mutex);
2149         p_ll2_conn->b_active = false;
2150         mutex_unlock(&p_ll2_conn->mutex);
2151 }
2152
2153 int qed_ll2_alloc(struct qed_hwfn *p_hwfn)
2154 {
2155         struct qed_ll2_info *p_ll2_connections;
2156         u8 i;
2157
2158         /* Allocate LL2's set struct */
2159         p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
2160                                     sizeof(struct qed_ll2_info), GFP_KERNEL);
2161         if (!p_ll2_connections) {
2162                 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
2163                 return -ENOMEM;
2164         }
2165
2166         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2167                 p_ll2_connections[i].my_id = i;
2168
2169         p_hwfn->p_ll2_info = p_ll2_connections;
2170         return 0;
2171 }
2172
2173 void qed_ll2_setup(struct qed_hwfn *p_hwfn)
2174 {
2175         int i;
2176
2177         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2178                 mutex_init(&p_hwfn->p_ll2_info[i].mutex);
2179 }
2180
2181 void qed_ll2_free(struct qed_hwfn *p_hwfn)
2182 {
2183         if (!p_hwfn->p_ll2_info)
2184                 return;
2185
2186         kfree(p_hwfn->p_ll2_info);
2187         p_hwfn->p_ll2_info = NULL;
2188 }
2189
2190 static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn,
2191                                     struct qed_ptt *p_ptt,
2192                                     struct qed_ll2_stats *p_stats)
2193 {
2194         struct core_ll2_port_stats port_stats;
2195
2196         memset(&port_stats, 0, sizeof(port_stats));
2197         qed_memcpy_from(p_hwfn, p_ptt, &port_stats,
2198                         BAR0_MAP_REG_TSDM_RAM +
2199                         TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)),
2200                         sizeof(port_stats));
2201
2202         p_stats->gsi_invalid_hdr += HILO_64_REGPAIR(port_stats.gsi_invalid_hdr);
2203         p_stats->gsi_invalid_pkt_length +=
2204             HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length);
2205         p_stats->gsi_unsupported_pkt_typ +=
2206             HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ);
2207         p_stats->gsi_crcchksm_error +=
2208             HILO_64_REGPAIR(port_stats.gsi_crcchksm_error);
2209 }
2210
2211 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,
2212                                 struct qed_ptt *p_ptt,
2213                                 struct qed_ll2_info *p_ll2_conn,
2214                                 struct qed_ll2_stats *p_stats)
2215 {
2216         struct core_ll2_tstorm_per_queue_stat tstats;
2217         u8 qid = p_ll2_conn->queue_id;
2218         u32 tstats_addr;
2219
2220         memset(&tstats, 0, sizeof(tstats));
2221         tstats_addr = BAR0_MAP_REG_TSDM_RAM +
2222                       CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
2223         qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
2224
2225         p_stats->packet_too_big_discard +=
2226                         HILO_64_REGPAIR(tstats.packet_too_big_discard);
2227         p_stats->no_buff_discard += HILO_64_REGPAIR(tstats.no_buff_discard);
2228 }
2229
2230 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
2231                                 struct qed_ptt *p_ptt,
2232                                 struct qed_ll2_info *p_ll2_conn,
2233                                 struct qed_ll2_stats *p_stats)
2234 {
2235         struct core_ll2_ustorm_per_queue_stat ustats;
2236         u8 qid = p_ll2_conn->queue_id;
2237         u32 ustats_addr;
2238
2239         memset(&ustats, 0, sizeof(ustats));
2240         ustats_addr = BAR0_MAP_REG_USDM_RAM +
2241                       CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
2242         qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
2243
2244         p_stats->rcv_ucast_bytes += HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
2245         p_stats->rcv_mcast_bytes += HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
2246         p_stats->rcv_bcast_bytes += HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
2247         p_stats->rcv_ucast_pkts += HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
2248         p_stats->rcv_mcast_pkts += HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
2249         p_stats->rcv_bcast_pkts += HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
2250 }
2251
2252 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
2253                                 struct qed_ptt *p_ptt,
2254                                 struct qed_ll2_info *p_ll2_conn,
2255                                 struct qed_ll2_stats *p_stats)
2256 {
2257         struct core_ll2_pstorm_per_queue_stat pstats;
2258         u8 stats_id = p_ll2_conn->tx_stats_id;
2259         u32 pstats_addr;
2260
2261         memset(&pstats, 0, sizeof(pstats));
2262         pstats_addr = BAR0_MAP_REG_PSDM_RAM +
2263                       CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
2264         qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
2265
2266         p_stats->sent_ucast_bytes += HILO_64_REGPAIR(pstats.sent_ucast_bytes);
2267         p_stats->sent_mcast_bytes += HILO_64_REGPAIR(pstats.sent_mcast_bytes);
2268         p_stats->sent_bcast_bytes += HILO_64_REGPAIR(pstats.sent_bcast_bytes);
2269         p_stats->sent_ucast_pkts += HILO_64_REGPAIR(pstats.sent_ucast_pkts);
2270         p_stats->sent_mcast_pkts += HILO_64_REGPAIR(pstats.sent_mcast_pkts);
2271         p_stats->sent_bcast_pkts += HILO_64_REGPAIR(pstats.sent_bcast_pkts);
2272 }
2273
2274 static int __qed_ll2_get_stats(void *cxt, u8 connection_handle,
2275                                struct qed_ll2_stats *p_stats)
2276 {
2277         struct qed_hwfn *p_hwfn = cxt;
2278         struct qed_ll2_info *p_ll2_conn = NULL;
2279         struct qed_ptt *p_ptt;
2280
2281         if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
2282             !p_hwfn->p_ll2_info)
2283                 return -EINVAL;
2284
2285         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
2286
2287         p_ptt = qed_ptt_acquire(p_hwfn);
2288         if (!p_ptt) {
2289                 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
2290                 return -EINVAL;
2291         }
2292
2293         if (p_ll2_conn->input.gsi_enable)
2294                 _qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats);
2295
2296         _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2297
2298         _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2299
2300         if (p_ll2_conn->tx_stats_en)
2301                 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2302
2303         qed_ptt_release(p_hwfn, p_ptt);
2304
2305         return 0;
2306 }
2307
2308 int qed_ll2_get_stats(void *cxt,
2309                       u8 connection_handle, struct qed_ll2_stats *p_stats)
2310 {
2311         memset(p_stats, 0, sizeof(*p_stats));
2312         return __qed_ll2_get_stats(cxt, connection_handle, p_stats);
2313 }
2314
2315 static void qed_ll2b_release_rx_packet(void *cxt,
2316                                        u8 connection_handle,
2317                                        void *cookie,
2318                                        dma_addr_t rx_buf_addr,
2319                                        bool b_last_packet)
2320 {
2321         struct qed_hwfn *p_hwfn = cxt;
2322
2323         qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie);
2324 }
2325
2326 static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
2327                                     const struct qed_ll2_cb_ops *ops,
2328                                     void *cookie)
2329 {
2330         cdev->ll2->cbs = ops;
2331         cdev->ll2->cb_cookie = cookie;
2332 }
2333
2334 struct qed_ll2_cbs ll2_cbs = {
2335         .rx_comp_cb = &qed_ll2b_complete_rx_packet,
2336         .rx_release_cb = &qed_ll2b_release_rx_packet,
2337         .tx_comp_cb = &qed_ll2b_complete_tx_packet,
2338         .tx_release_cb = &qed_ll2b_complete_tx_packet,
2339 };
2340
2341 static void qed_ll2_set_conn_data(struct qed_hwfn *p_hwfn,
2342                                   struct qed_ll2_acquire_data *data,
2343                                   struct qed_ll2_params *params,
2344                                   enum qed_ll2_conn_type conn_type,
2345                                   u8 *handle, bool lb)
2346 {
2347         memset(data, 0, sizeof(*data));
2348
2349         data->input.conn_type = conn_type;
2350         data->input.mtu = params->mtu;
2351         data->input.rx_num_desc = QED_LL2_RX_SIZE;
2352         data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets;
2353         data->input.rx_vlan_removal_en = params->rx_vlan_stripping;
2354         data->input.tx_num_desc = QED_LL2_TX_SIZE;
2355         data->p_connection_handle = handle;
2356         data->cbs = &ll2_cbs;
2357         ll2_cbs.cookie = p_hwfn;
2358
2359         if (lb) {
2360                 data->input.tx_tc = PKT_LB_TC;
2361                 data->input.tx_dest = QED_LL2_TX_DEST_LB;
2362         } else {
2363                 data->input.tx_tc = 0;
2364                 data->input.tx_dest = QED_LL2_TX_DEST_NW;
2365         }
2366 }
2367
2368 static int qed_ll2_start_ooo(struct qed_hwfn *p_hwfn,
2369                              struct qed_ll2_params *params)
2370 {
2371         u8 *handle = &p_hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
2372         struct qed_ll2_acquire_data data;
2373         int rc;
2374
2375         qed_ll2_set_conn_data(p_hwfn, &data, params,
2376                               QED_LL2_TYPE_OOO, handle, true);
2377
2378         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2379         if (rc) {
2380                 DP_INFO(p_hwfn, "Failed to acquire LL2 OOO connection\n");
2381                 goto out;
2382         }
2383
2384         rc = qed_ll2_establish_connection(p_hwfn, *handle);
2385         if (rc) {
2386                 DP_INFO(p_hwfn, "Failed to establish LL2 OOO connection\n");
2387                 goto fail;
2388         }
2389
2390         return 0;
2391
2392 fail:
2393         qed_ll2_release_connection(p_hwfn, *handle);
2394 out:
2395         *handle = QED_LL2_UNUSED_HANDLE;
2396         return rc;
2397 }
2398
2399 static bool qed_ll2_is_storage_eng1(struct qed_dev *cdev)
2400 {
2401         return (QED_IS_FCOE_PERSONALITY(QED_LEADING_HWFN(cdev)) ||
2402                 QED_IS_ISCSI_PERSONALITY(QED_LEADING_HWFN(cdev))) &&
2403                 (QED_AFFIN_HWFN(cdev) != QED_LEADING_HWFN(cdev));
2404 }
2405
2406 static int __qed_ll2_stop(struct qed_hwfn *p_hwfn)
2407 {
2408         struct qed_dev *cdev = p_hwfn->cdev;
2409         int rc;
2410
2411         rc = qed_ll2_terminate_connection(p_hwfn, cdev->ll2->handle);
2412         if (rc)
2413                 DP_INFO(cdev, "Failed to terminate LL2 connection\n");
2414
2415         qed_ll2_release_connection(p_hwfn, cdev->ll2->handle);
2416
2417         return rc;
2418 }
2419
2420 static int qed_ll2_stop(struct qed_dev *cdev)
2421 {
2422         bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2423         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2424         int rc = 0, rc2 = 0;
2425
2426         if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
2427                 return 0;
2428
2429         qed_llh_remove_mac_filter(cdev, 0, cdev->ll2_mac_address);
2430         eth_zero_addr(cdev->ll2_mac_address);
2431
2432         if (QED_IS_ISCSI_PERSONALITY(p_hwfn))
2433                 qed_ll2_stop_ooo(p_hwfn);
2434
2435         /* In CMT mode, LL2 is always started on engine 0 for a storage PF */
2436         if (b_is_storage_eng1) {
2437                 rc2 = __qed_ll2_stop(QED_LEADING_HWFN(cdev));
2438                 if (rc2)
2439                         DP_NOTICE(QED_LEADING_HWFN(cdev),
2440                                   "Failed to stop LL2 on engine 0\n");
2441         }
2442
2443         rc = __qed_ll2_stop(p_hwfn);
2444         if (rc)
2445                 DP_NOTICE(p_hwfn, "Failed to stop LL2\n");
2446
2447         qed_ll2_kill_buffers(cdev);
2448
2449         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2450
2451         return rc | rc2;
2452 }
2453
2454 static int __qed_ll2_start(struct qed_hwfn *p_hwfn,
2455                            struct qed_ll2_params *params)
2456 {
2457         struct qed_ll2_buffer *buffer, *tmp_buffer;
2458         struct qed_dev *cdev = p_hwfn->cdev;
2459         enum qed_ll2_conn_type conn_type;
2460         struct qed_ll2_acquire_data data;
2461         int rc, rx_cnt;
2462
2463         switch (p_hwfn->hw_info.personality) {
2464         case QED_PCI_FCOE:
2465                 conn_type = QED_LL2_TYPE_FCOE;
2466                 break;
2467         case QED_PCI_ISCSI:
2468                 conn_type = QED_LL2_TYPE_ISCSI;
2469                 break;
2470         case QED_PCI_ETH_ROCE:
2471                 conn_type = QED_LL2_TYPE_ROCE;
2472                 break;
2473         default:
2474
2475                 conn_type = QED_LL2_TYPE_TEST;
2476         }
2477
2478         qed_ll2_set_conn_data(p_hwfn, &data, params, conn_type,
2479                               &cdev->ll2->handle, false);
2480
2481         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2482         if (rc) {
2483                 DP_INFO(p_hwfn, "Failed to acquire LL2 connection\n");
2484                 return rc;
2485         }
2486
2487         rc = qed_ll2_establish_connection(p_hwfn, cdev->ll2->handle);
2488         if (rc) {
2489                 DP_INFO(p_hwfn, "Failed to establish LL2 connection\n");
2490                 goto release_conn;
2491         }
2492
2493         /* Post all Rx buffers to FW */
2494         spin_lock_bh(&cdev->ll2->lock);
2495         rx_cnt = cdev->ll2->rx_cnt;
2496         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) {
2497                 rc = qed_ll2_post_rx_buffer(p_hwfn,
2498                                             cdev->ll2->handle,
2499                                             buffer->phys_addr, 0, buffer, 1);
2500                 if (rc) {
2501                         DP_INFO(p_hwfn,
2502                                 "Failed to post an Rx buffer; Deleting it\n");
2503                         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
2504                                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
2505                         kfree(buffer->data);
2506                         list_del(&buffer->list);
2507                         kfree(buffer);
2508                 } else {
2509                         rx_cnt++;
2510                 }
2511         }
2512         spin_unlock_bh(&cdev->ll2->lock);
2513
2514         if (rx_cnt == cdev->ll2->rx_cnt) {
2515                 DP_NOTICE(p_hwfn, "Failed passing even a single Rx buffer\n");
2516                 goto terminate_conn;
2517         }
2518         cdev->ll2->rx_cnt = rx_cnt;
2519
2520         return 0;
2521
2522 terminate_conn:
2523         qed_ll2_terminate_connection(p_hwfn, cdev->ll2->handle);
2524 release_conn:
2525         qed_ll2_release_connection(p_hwfn, cdev->ll2->handle);
2526         return rc;
2527 }
2528
2529 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
2530 {
2531         bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2532         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2533         struct qed_ll2_buffer *buffer;
2534         int rx_num_desc, i, rc;
2535
2536         if (!is_valid_ether_addr(params->ll2_mac_address)) {
2537                 DP_NOTICE(cdev, "Invalid Ethernet address\n");
2538                 return -EINVAL;
2539         }
2540
2541         WARN_ON(!cdev->ll2->cbs);
2542
2543         /* Initialize LL2 locks & lists */
2544         INIT_LIST_HEAD(&cdev->ll2->list);
2545         spin_lock_init(&cdev->ll2->lock);
2546
2547         cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
2548                              L1_CACHE_BYTES + params->mtu;
2549
2550         /* Allocate memory for LL2.
2551          * In CMT mode, in case of a storage PF which is affintized to engine 1,
2552          * LL2 is started also on engine 0 and thus we need twofold buffers.
2553          */
2554         rx_num_desc = QED_LL2_RX_SIZE * (b_is_storage_eng1 ? 2 : 1);
2555         DP_INFO(cdev, "Allocating %d LL2 buffers of size %08x bytes\n",
2556                 rx_num_desc, cdev->ll2->rx_size);
2557         for (i = 0; i < rx_num_desc; i++) {
2558                 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2559                 if (!buffer) {
2560                         DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
2561                         rc = -ENOMEM;
2562                         goto err0;
2563                 }
2564
2565                 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
2566                                           &buffer->phys_addr);
2567                 if (rc) {
2568                         kfree(buffer);
2569                         goto err0;
2570                 }
2571
2572                 list_add_tail(&buffer->list, &cdev->ll2->list);
2573         }
2574
2575         rc = __qed_ll2_start(p_hwfn, params);
2576         if (rc) {
2577                 DP_NOTICE(cdev, "Failed to start LL2\n");
2578                 goto err0;
2579         }
2580
2581         /* In CMT mode, always need to start LL2 on engine 0 for a storage PF,
2582          * since broadcast/mutlicast packets are routed to engine 0.
2583          */
2584         if (b_is_storage_eng1) {
2585                 rc = __qed_ll2_start(QED_LEADING_HWFN(cdev), params);
2586                 if (rc) {
2587                         DP_NOTICE(QED_LEADING_HWFN(cdev),
2588                                   "Failed to start LL2 on engine 0\n");
2589                         goto err1;
2590                 }
2591         }
2592
2593         if (QED_IS_ISCSI_PERSONALITY(p_hwfn)) {
2594                 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n");
2595                 rc = qed_ll2_start_ooo(p_hwfn, params);
2596                 if (rc) {
2597                         DP_NOTICE(cdev, "Failed to start OOO LL2\n");
2598                         goto err2;
2599                 }
2600         }
2601
2602         rc = qed_llh_add_mac_filter(cdev, 0, params->ll2_mac_address);
2603         if (rc) {
2604                 DP_NOTICE(cdev, "Failed to add an LLH filter\n");
2605                 goto err3;
2606         }
2607
2608         ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
2609
2610         return 0;
2611
2612 err3:
2613         if (QED_IS_ISCSI_PERSONALITY(p_hwfn))
2614                 qed_ll2_stop_ooo(p_hwfn);
2615 err2:
2616         if (b_is_storage_eng1)
2617                 __qed_ll2_stop(QED_LEADING_HWFN(cdev));
2618 err1:
2619         __qed_ll2_stop(p_hwfn);
2620 err0:
2621         qed_ll2_kill_buffers(cdev);
2622         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2623         return rc;
2624 }
2625
2626 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb,
2627                               unsigned long xmit_flags)
2628 {
2629         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2630         struct qed_ll2_tx_pkt_info pkt;
2631         const skb_frag_t *frag;
2632         u8 flags = 0, nr_frags;
2633         int rc = -EINVAL, i;
2634         dma_addr_t mapping;
2635         u16 vlan = 0;
2636
2637         if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
2638                 DP_INFO(cdev, "Cannot transmit a checksummed packet\n");
2639                 return -EINVAL;
2640         }
2641
2642         /* Cache number of fragments from SKB since SKB may be freed by
2643          * the completion routine after calling qed_ll2_prepare_tx_packet()
2644          */
2645         nr_frags = skb_shinfo(skb)->nr_frags;
2646
2647         if (1 + nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) {
2648                 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
2649                        1 + nr_frags);
2650                 return -EINVAL;
2651         }
2652
2653         mapping = dma_map_single(&cdev->pdev->dev, skb->data,
2654                                  skb->len, DMA_TO_DEVICE);
2655         if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2656                 DP_NOTICE(cdev, "SKB mapping failed\n");
2657                 return -EINVAL;
2658         }
2659
2660         /* Request HW to calculate IP csum */
2661         if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
2662               ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
2663                 flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT);
2664
2665         if (skb_vlan_tag_present(skb)) {
2666                 vlan = skb_vlan_tag_get(skb);
2667                 flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT);
2668         }
2669
2670         memset(&pkt, 0, sizeof(pkt));
2671         pkt.num_of_bds = 1 + nr_frags;
2672         pkt.vlan = vlan;
2673         pkt.bd_flags = flags;
2674         pkt.tx_dest = QED_LL2_TX_DEST_NW;
2675         pkt.first_frag = mapping;
2676         pkt.first_frag_len = skb->len;
2677         pkt.cookie = skb;
2678         if (test_bit(QED_MF_UFP_SPECIFIC, &cdev->mf_bits) &&
2679             test_bit(QED_LL2_XMIT_FLAGS_FIP_DISCOVERY, &xmit_flags))
2680                 pkt.remove_stag = true;
2681
2682         /* qed_ll2_prepare_tx_packet() may actually send the packet if
2683          * there are no fragments in the skb and subsequently the completion
2684          * routine may run and free the SKB, so no dereferencing the SKB
2685          * beyond this point unless skb has any fragments.
2686          */
2687         rc = qed_ll2_prepare_tx_packet(p_hwfn, cdev->ll2->handle,
2688                                        &pkt, 1);
2689         if (rc)
2690                 goto err;
2691
2692         for (i = 0; i < nr_frags; i++) {
2693                 frag = &skb_shinfo(skb)->frags[i];
2694
2695                 mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0,
2696                                            skb_frag_size(frag), DMA_TO_DEVICE);
2697
2698                 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2699                         DP_NOTICE(cdev,
2700                                   "Unable to map frag - dropping packet\n");
2701                         rc = -ENOMEM;
2702                         goto err;
2703                 }
2704
2705                 rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn,
2706                                                        cdev->ll2->handle,
2707                                                        mapping,
2708                                                        skb_frag_size(frag));
2709
2710                 /* if failed not much to do here, partial packet has been posted
2711                  * we can't free memory, will need to wait for completion
2712                  */
2713                 if (rc)
2714                         goto err2;
2715         }
2716
2717         return 0;
2718
2719 err:
2720         dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE);
2721 err2:
2722         return rc;
2723 }
2724
2725 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats)
2726 {
2727         bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2728         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2729         int rc;
2730
2731         if (!cdev->ll2)
2732                 return -EINVAL;
2733
2734         rc = qed_ll2_get_stats(p_hwfn, cdev->ll2->handle, stats);
2735         if (rc) {
2736                 DP_NOTICE(p_hwfn, "Failed to get LL2 stats\n");
2737                 return rc;
2738         }
2739
2740         /* In CMT mode, LL2 is always started on engine 0 for a storage PF */
2741         if (b_is_storage_eng1) {
2742                 rc = __qed_ll2_get_stats(QED_LEADING_HWFN(cdev),
2743                                          cdev->ll2->handle, stats);
2744                 if (rc) {
2745                         DP_NOTICE(QED_LEADING_HWFN(cdev),
2746                                   "Failed to get LL2 stats on engine 0\n");
2747                         return rc;
2748                 }
2749         }
2750
2751         return 0;
2752 }
2753
2754 const struct qed_ll2_ops qed_ll2_ops_pass = {
2755         .start = &qed_ll2_start,
2756         .stop = &qed_ll2_stop,
2757         .start_xmit = &qed_ll2_start_xmit,
2758         .register_cb_ops = &qed_ll2_register_cb_ops,
2759         .get_stats = &qed_ll2_stats,
2760 };
2761
2762 int qed_ll2_alloc_if(struct qed_dev *cdev)
2763 {
2764         cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL);
2765         return cdev->ll2 ? 0 : -ENOMEM;
2766 }
2767
2768 void qed_ll2_dealloc_if(struct qed_dev *cdev)
2769 {
2770         kfree(cdev->ll2);
2771         cdev->ll2 = NULL;
2772 }