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
 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         return qed_spq_post(p_hwfn, p_ent, NULL);
1000 }
1001
1002 static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
1003                                      struct qed_ll2_info *p_ll2_conn)
1004 {
1005         enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
1006         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1007         struct core_tx_start_ramrod_data *p_ramrod = NULL;
1008         struct qed_spq_entry *p_ent = NULL;
1009         struct qed_sp_init_data init_data;
1010         u16 pq_id = 0, pbl_size;
1011         int rc = -EINVAL;
1012
1013         if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
1014                 return 0;
1015
1016         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
1017                 p_ll2_conn->tx_stats_en = 0;
1018         else
1019                 p_ll2_conn->tx_stats_en = 1;
1020
1021         /* Get SPQ entry */
1022         memset(&init_data, 0, sizeof(init_data));
1023         init_data.cid = p_ll2_conn->cid;
1024         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1025         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1026
1027         rc = qed_sp_init_request(p_hwfn, &p_ent,
1028                                  CORE_RAMROD_TX_QUEUE_START,
1029                                  PROTOCOLID_CORE, &init_data);
1030         if (rc)
1031                 return rc;
1032
1033         p_ramrod = &p_ent->ramrod.core_tx_queue_start;
1034
1035         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
1036         p_ramrod->sb_index = p_tx->tx_sb_index;
1037         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
1038         p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
1039         p_ramrod->stats_id = p_ll2_conn->tx_stats_id;
1040
1041         DMA_REGPAIR_LE(p_ramrod->pbl_base_addr,
1042                        qed_chain_get_pbl_phys(&p_tx->txq_chain));
1043         pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain);
1044         p_ramrod->pbl_size = cpu_to_le16(pbl_size);
1045
1046         switch (p_ll2_conn->input.tx_tc) {
1047         case PURE_LB_TC:
1048                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
1049                 break;
1050         case PKT_LB_TC:
1051                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO);
1052                 break;
1053         default:
1054                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
1055                 break;
1056         }
1057
1058         p_ramrod->qm_pq_id = cpu_to_le16(pq_id);
1059
1060         switch (conn_type) {
1061         case QED_LL2_TYPE_FCOE:
1062                 p_ramrod->conn_type = PROTOCOLID_FCOE;
1063                 break;
1064         case QED_LL2_TYPE_ISCSI:
1065                 p_ramrod->conn_type = PROTOCOLID_ISCSI;
1066                 break;
1067         case QED_LL2_TYPE_ROCE:
1068                 p_ramrod->conn_type = PROTOCOLID_ROCE;
1069                 break;
1070         case QED_LL2_TYPE_IWARP:
1071                 p_ramrod->conn_type = PROTOCOLID_IWARP;
1072                 break;
1073         case QED_LL2_TYPE_OOO:
1074                 if (p_hwfn->hw_info.personality == QED_PCI_ISCSI)
1075                         p_ramrod->conn_type = PROTOCOLID_ISCSI;
1076                 else
1077                         p_ramrod->conn_type = PROTOCOLID_IWARP;
1078                 break;
1079         default:
1080                 p_ramrod->conn_type = PROTOCOLID_ETH;
1081                 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type);
1082         }
1083
1084         p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1085
1086         rc = qed_spq_post(p_hwfn, p_ent, NULL);
1087         if (rc)
1088                 return rc;
1089
1090         rc = qed_db_recovery_add(p_hwfn->cdev, p_tx->doorbell_addr,
1091                                  &p_tx->db_msg, DB_REC_WIDTH_32B,
1092                                  DB_REC_KERNEL);
1093         return rc;
1094 }
1095
1096 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn,
1097                                     struct qed_ll2_info *p_ll2_conn)
1098 {
1099         struct core_rx_stop_ramrod_data *p_ramrod = NULL;
1100         struct qed_spq_entry *p_ent = NULL;
1101         struct qed_sp_init_data init_data;
1102         int rc = -EINVAL;
1103
1104         /* Get SPQ entry */
1105         memset(&init_data, 0, sizeof(init_data));
1106         init_data.cid = p_ll2_conn->cid;
1107         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1108         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1109
1110         rc = qed_sp_init_request(p_hwfn, &p_ent,
1111                                  CORE_RAMROD_RX_QUEUE_STOP,
1112                                  PROTOCOLID_CORE, &init_data);
1113         if (rc)
1114                 return rc;
1115
1116         p_ramrod = &p_ent->ramrod.core_rx_queue_stop;
1117
1118         p_ramrod->complete_event_flg = 1;
1119         p_ramrod->queue_id = p_ll2_conn->queue_id;
1120
1121         return qed_spq_post(p_hwfn, p_ent, NULL);
1122 }
1123
1124 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn,
1125                                     struct qed_ll2_info *p_ll2_conn)
1126 {
1127         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1128         struct qed_spq_entry *p_ent = NULL;
1129         struct qed_sp_init_data init_data;
1130         int rc = -EINVAL;
1131         qed_db_recovery_del(p_hwfn->cdev, p_tx->doorbell_addr, &p_tx->db_msg);
1132
1133         /* Get SPQ entry */
1134         memset(&init_data, 0, sizeof(init_data));
1135         init_data.cid = p_ll2_conn->cid;
1136         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1137         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1138
1139         rc = qed_sp_init_request(p_hwfn, &p_ent,
1140                                  CORE_RAMROD_TX_QUEUE_STOP,
1141                                  PROTOCOLID_CORE, &init_data);
1142         if (rc)
1143                 return rc;
1144
1145         return qed_spq_post(p_hwfn, p_ent, NULL);
1146 }
1147
1148 static int
1149 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
1150                               struct qed_ll2_info *p_ll2_info)
1151 {
1152         struct qed_ll2_rx_packet *p_descq;
1153         u32 capacity;
1154         int rc = 0;
1155
1156         if (!p_ll2_info->input.rx_num_desc)
1157                 goto out;
1158
1159         rc = qed_chain_alloc(p_hwfn->cdev,
1160                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1161                              QED_CHAIN_MODE_NEXT_PTR,
1162                              QED_CHAIN_CNT_TYPE_U16,
1163                              p_ll2_info->input.rx_num_desc,
1164                              sizeof(struct core_rx_bd),
1165                              &p_ll2_info->rx_queue.rxq_chain, NULL);
1166         if (rc) {
1167                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
1168                 goto out;
1169         }
1170
1171         capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
1172         p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet),
1173                           GFP_KERNEL);
1174         if (!p_descq) {
1175                 rc = -ENOMEM;
1176                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n");
1177                 goto out;
1178         }
1179         p_ll2_info->rx_queue.descq_array = p_descq;
1180
1181         rc = qed_chain_alloc(p_hwfn->cdev,
1182                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1183                              QED_CHAIN_MODE_PBL,
1184                              QED_CHAIN_CNT_TYPE_U16,
1185                              p_ll2_info->input.rx_num_desc,
1186                              sizeof(struct core_rx_fast_path_cqe),
1187                              &p_ll2_info->rx_queue.rcq_chain, NULL);
1188         if (rc) {
1189                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
1190                 goto out;
1191         }
1192
1193         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1194                    "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
1195                    p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc);
1196
1197 out:
1198         return rc;
1199 }
1200
1201 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
1202                                          struct qed_ll2_info *p_ll2_info)
1203 {
1204         struct qed_ll2_tx_packet *p_descq;
1205         u32 desc_size;
1206         u32 capacity;
1207         int rc = 0;
1208
1209         if (!p_ll2_info->input.tx_num_desc)
1210                 goto out;
1211
1212         rc = qed_chain_alloc(p_hwfn->cdev,
1213                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1214                              QED_CHAIN_MODE_PBL,
1215                              QED_CHAIN_CNT_TYPE_U16,
1216                              p_ll2_info->input.tx_num_desc,
1217                              sizeof(struct core_tx_bd),
1218                              &p_ll2_info->tx_queue.txq_chain, NULL);
1219         if (rc)
1220                 goto out;
1221
1222         capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
1223         /* First element is part of the packet, rest are flexibly added */
1224         desc_size = (sizeof(*p_descq) +
1225                      (p_ll2_info->input.tx_max_bds_per_packet - 1) *
1226                      sizeof(p_descq->bds_set));
1227
1228         p_descq = kcalloc(capacity, desc_size, GFP_KERNEL);
1229         if (!p_descq) {
1230                 rc = -ENOMEM;
1231                 goto out;
1232         }
1233         p_ll2_info->tx_queue.descq_mem = p_descq;
1234
1235         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1236                    "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
1237                    p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc);
1238
1239 out:
1240         if (rc)
1241                 DP_NOTICE(p_hwfn,
1242                           "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
1243                           p_ll2_info->input.tx_num_desc);
1244         return rc;
1245 }
1246
1247 static int
1248 qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn,
1249                                struct qed_ll2_info *p_ll2_info, u16 mtu)
1250 {
1251         struct qed_ooo_buffer *p_buf = NULL;
1252         void *p_virt;
1253         u16 buf_idx;
1254         int rc = 0;
1255
1256         if (p_ll2_info->input.conn_type != QED_LL2_TYPE_OOO)
1257                 return rc;
1258
1259         /* Correct number of requested OOO buffers if needed */
1260         if (!p_ll2_info->input.rx_num_ooo_buffers) {
1261                 u16 num_desc = p_ll2_info->input.rx_num_desc;
1262
1263                 if (!num_desc)
1264                         return -EINVAL;
1265                 p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2;
1266         }
1267
1268         for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers;
1269              buf_idx++) {
1270                 p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL);
1271                 if (!p_buf) {
1272                         rc = -ENOMEM;
1273                         goto out;
1274                 }
1275
1276                 p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE;
1277                 p_buf->rx_buffer_size = (p_buf->rx_buffer_size +
1278                                          ETH_CACHE_LINE_SIZE - 1) &
1279                                         ~(ETH_CACHE_LINE_SIZE - 1);
1280                 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
1281                                             p_buf->rx_buffer_size,
1282                                             &p_buf->rx_buffer_phys_addr,
1283                                             GFP_KERNEL);
1284                 if (!p_virt) {
1285                         kfree(p_buf);
1286                         rc = -ENOMEM;
1287                         goto out;
1288                 }
1289
1290                 p_buf->rx_buffer_virt_addr = p_virt;
1291                 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf);
1292         }
1293
1294         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1295                    "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n",
1296                    p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size);
1297
1298 out:
1299         return rc;
1300 }
1301
1302 static int
1303 qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs)
1304 {
1305         if (!cbs || (!cbs->rx_comp_cb ||
1306                      !cbs->rx_release_cb ||
1307                      !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie))
1308                 return -EINVAL;
1309
1310         p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb;
1311         p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb;
1312         p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb;
1313         p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb;
1314         p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb;
1315         p_ll2_info->cbs.cookie = cbs->cookie;
1316
1317         return 0;
1318 }
1319
1320 static enum core_error_handle
1321 qed_ll2_get_error_choice(enum qed_ll2_error_handle err)
1322 {
1323         switch (err) {
1324         case QED_LL2_DROP_PACKET:
1325                 return LL2_DROP_PACKET;
1326         case QED_LL2_DO_NOTHING:
1327                 return LL2_DO_NOTHING;
1328         case QED_LL2_ASSERT:
1329                 return LL2_ASSERT;
1330         default:
1331                 return LL2_DO_NOTHING;
1332         }
1333 }
1334
1335 int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data)
1336 {
1337         struct qed_hwfn *p_hwfn = cxt;
1338         qed_int_comp_cb_t comp_rx_cb, comp_tx_cb;
1339         struct qed_ll2_info *p_ll2_info = NULL;
1340         u8 i, *p_tx_max;
1341         int rc;
1342
1343         if (!data->p_connection_handle || !p_hwfn->p_ll2_info)
1344                 return -EINVAL;
1345
1346         /* Find a free connection to be used */
1347         for (i = 0; (i < QED_MAX_NUM_OF_LL2_CONNECTIONS); i++) {
1348                 mutex_lock(&p_hwfn->p_ll2_info[i].mutex);
1349                 if (p_hwfn->p_ll2_info[i].b_active) {
1350                         mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1351                         continue;
1352                 }
1353
1354                 p_hwfn->p_ll2_info[i].b_active = true;
1355                 p_ll2_info = &p_hwfn->p_ll2_info[i];
1356                 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1357                 break;
1358         }
1359         if (!p_ll2_info)
1360                 return -EBUSY;
1361
1362         memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input));
1363
1364         switch (data->input.tx_dest) {
1365         case QED_LL2_TX_DEST_NW:
1366                 p_ll2_info->tx_dest = CORE_TX_DEST_NW;
1367                 break;
1368         case QED_LL2_TX_DEST_LB:
1369                 p_ll2_info->tx_dest = CORE_TX_DEST_LB;
1370                 break;
1371         case QED_LL2_TX_DEST_DROP:
1372                 p_ll2_info->tx_dest = CORE_TX_DEST_DROP;
1373                 break;
1374         default:
1375                 return -EINVAL;
1376         }
1377
1378         if (data->input.conn_type == QED_LL2_TYPE_OOO ||
1379             data->input.secondary_queue)
1380                 p_ll2_info->main_func_queue = false;
1381         else
1382                 p_ll2_info->main_func_queue = true;
1383
1384         /* Correct maximum number of Tx BDs */
1385         p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet;
1386         if (*p_tx_max == 0)
1387                 *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET;
1388         else
1389                 *p_tx_max = min_t(u8, *p_tx_max,
1390                                   CORE_LL2_TX_MAX_BDS_PER_PACKET);
1391
1392         rc = qed_ll2_set_cbs(p_ll2_info, data->cbs);
1393         if (rc) {
1394                 DP_NOTICE(p_hwfn, "Invalid callback functions\n");
1395                 goto q_allocate_fail;
1396         }
1397
1398         rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info);
1399         if (rc)
1400                 goto q_allocate_fail;
1401
1402         rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info);
1403         if (rc)
1404                 goto q_allocate_fail;
1405
1406         rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info,
1407                                             data->input.mtu);
1408         if (rc)
1409                 goto q_allocate_fail;
1410
1411         /* Register callbacks for the Rx/Tx queues */
1412         if (data->input.conn_type == QED_LL2_TYPE_OOO) {
1413                 comp_rx_cb = qed_ll2_lb_rxq_completion;
1414                 comp_tx_cb = qed_ll2_lb_txq_completion;
1415         } else {
1416                 comp_rx_cb = qed_ll2_rxq_completion;
1417                 comp_tx_cb = qed_ll2_txq_completion;
1418         }
1419
1420         if (data->input.rx_num_desc) {
1421                 qed_int_register_cb(p_hwfn, comp_rx_cb,
1422                                     &p_hwfn->p_ll2_info[i],
1423                                     &p_ll2_info->rx_queue.rx_sb_index,
1424                                     &p_ll2_info->rx_queue.p_fw_cons);
1425                 p_ll2_info->rx_queue.b_cb_registered = true;
1426         }
1427
1428         if (data->input.tx_num_desc) {
1429                 qed_int_register_cb(p_hwfn,
1430                                     comp_tx_cb,
1431                                     &p_hwfn->p_ll2_info[i],
1432                                     &p_ll2_info->tx_queue.tx_sb_index,
1433                                     &p_ll2_info->tx_queue.p_fw_cons);
1434                 p_ll2_info->tx_queue.b_cb_registered = true;
1435         }
1436
1437         *data->p_connection_handle = i;
1438         return rc;
1439
1440 q_allocate_fail:
1441         qed_ll2_release_connection(p_hwfn, i);
1442         return -ENOMEM;
1443 }
1444
1445 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn,
1446                                            struct qed_ll2_info *p_ll2_conn)
1447 {
1448         enum qed_ll2_error_handle error_input;
1449         enum core_error_handle error_mode;
1450         u8 action_on_error = 0;
1451
1452         if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
1453                 return 0;
1454
1455         DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0);
1456         error_input = p_ll2_conn->input.ai_err_packet_too_big;
1457         error_mode = qed_ll2_get_error_choice(error_input);
1458         SET_FIELD(action_on_error,
1459                   CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode);
1460         error_input = p_ll2_conn->input.ai_err_no_buf;
1461         error_mode = qed_ll2_get_error_choice(error_input);
1462         SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode);
1463
1464         return qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
1465 }
1466
1467 static void
1468 qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn,
1469                                  struct qed_ll2_info *p_ll2_conn)
1470 {
1471         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
1472                 return;
1473
1474         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1475         qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
1476 }
1477
1478 int qed_ll2_establish_connection(void *cxt, u8 connection_handle)
1479 {
1480         struct qed_hwfn *p_hwfn = cxt;
1481         struct qed_ll2_info *p_ll2_conn;
1482         struct qed_ll2_tx_packet *p_pkt;
1483         struct qed_ll2_rx_queue *p_rx;
1484         struct qed_ll2_tx_queue *p_tx;
1485         struct qed_ptt *p_ptt;
1486         int rc = -EINVAL;
1487         u32 i, capacity;
1488         u32 desc_size;
1489         u8 qid;
1490
1491         p_ptt = qed_ptt_acquire(p_hwfn);
1492         if (!p_ptt)
1493                 return -EAGAIN;
1494
1495         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1496         if (!p_ll2_conn) {
1497                 rc = -EINVAL;
1498                 goto out;
1499         }
1500
1501         p_rx = &p_ll2_conn->rx_queue;
1502         p_tx = &p_ll2_conn->tx_queue;
1503
1504         qed_chain_reset(&p_rx->rxq_chain);
1505         qed_chain_reset(&p_rx->rcq_chain);
1506         INIT_LIST_HEAD(&p_rx->active_descq);
1507         INIT_LIST_HEAD(&p_rx->free_descq);
1508         INIT_LIST_HEAD(&p_rx->posting_descq);
1509         spin_lock_init(&p_rx->lock);
1510         capacity = qed_chain_get_capacity(&p_rx->rxq_chain);
1511         for (i = 0; i < capacity; i++)
1512                 list_add_tail(&p_rx->descq_array[i].list_entry,
1513                               &p_rx->free_descq);
1514         *p_rx->p_fw_cons = 0;
1515
1516         qed_chain_reset(&p_tx->txq_chain);
1517         INIT_LIST_HEAD(&p_tx->active_descq);
1518         INIT_LIST_HEAD(&p_tx->free_descq);
1519         INIT_LIST_HEAD(&p_tx->sending_descq);
1520         spin_lock_init(&p_tx->lock);
1521         capacity = qed_chain_get_capacity(&p_tx->txq_chain);
1522         /* First element is part of the packet, rest are flexibly added */
1523         desc_size = (sizeof(*p_pkt) +
1524                      (p_ll2_conn->input.tx_max_bds_per_packet - 1) *
1525                      sizeof(p_pkt->bds_set));
1526
1527         for (i = 0; i < capacity; i++) {
1528                 p_pkt = p_tx->descq_mem + desc_size * i;
1529                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
1530         }
1531         p_tx->cur_completing_bd_idx = 0;
1532         p_tx->bds_idx = 0;
1533         p_tx->b_completing_packet = false;
1534         p_tx->cur_send_packet = NULL;
1535         p_tx->cur_send_frag_num = 0;
1536         p_tx->cur_completing_frag_num = 0;
1537         *p_tx->p_fw_cons = 0;
1538
1539         rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
1540         if (rc)
1541                 goto out;
1542
1543         qid = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] + connection_handle;
1544         p_ll2_conn->queue_id = qid;
1545         p_ll2_conn->tx_stats_id = qid;
1546         p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview +
1547                                             GTT_BAR0_MAP_REG_TSDM_RAM +
1548                                             TSTORM_LL2_RX_PRODS_OFFSET(qid);
1549         p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells +
1550                                             qed_db_addr(p_ll2_conn->cid,
1551                                                         DQ_DEMS_LEGACY);
1552         /* prepare db data */
1553         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
1554         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
1555         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
1556                   DQ_XCM_CORE_TX_BD_PROD_CMD);
1557         p_tx->db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
1558
1559
1560         rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
1561         if (rc)
1562                 goto out;
1563
1564         rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
1565         if (rc)
1566                 goto out;
1567
1568         if (!QED_IS_RDMA_PERSONALITY(p_hwfn))
1569                 qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1);
1570
1571         qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn);
1572
1573         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1574                 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
1575                         qed_llh_add_protocol_filter(p_hwfn->cdev, 0,
1576                                                     QED_LLH_FILTER_ETHERTYPE,
1577                                                     ETH_P_FCOE, 0);
1578                 qed_llh_add_protocol_filter(p_hwfn->cdev, 0,
1579                                             QED_LLH_FILTER_ETHERTYPE,
1580                                             ETH_P_FIP, 0);
1581         }
1582
1583 out:
1584         qed_ptt_release(p_hwfn, p_ptt);
1585         return rc;
1586 }
1587
1588 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn,
1589                                              struct qed_ll2_rx_queue *p_rx,
1590                                              struct qed_ll2_rx_packet *p_curp)
1591 {
1592         struct qed_ll2_rx_packet *p_posting_packet = NULL;
1593         struct core_ll2_rx_prod rx_prod = { 0, 0, 0 };
1594         bool b_notify_fw = false;
1595         u16 bd_prod, cq_prod;
1596
1597         /* This handles the flushing of already posted buffers */
1598         while (!list_empty(&p_rx->posting_descq)) {
1599                 p_posting_packet = list_first_entry(&p_rx->posting_descq,
1600                                                     struct qed_ll2_rx_packet,
1601                                                     list_entry);
1602                 list_move_tail(&p_posting_packet->list_entry,
1603                                &p_rx->active_descq);
1604                 b_notify_fw = true;
1605         }
1606
1607         /* This handles the supplied packet [if there is one] */
1608         if (p_curp) {
1609                 list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
1610                 b_notify_fw = true;
1611         }
1612
1613         if (!b_notify_fw)
1614                 return;
1615
1616         bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
1617         cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
1618         rx_prod.bd_prod = cpu_to_le16(bd_prod);
1619         rx_prod.cqe_prod = cpu_to_le16(cq_prod);
1620
1621         /* Make sure chain element is updated before ringing the doorbell */
1622         dma_wmb();
1623
1624         DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
1625 }
1626
1627 int qed_ll2_post_rx_buffer(void *cxt,
1628                            u8 connection_handle,
1629                            dma_addr_t addr,
1630                            u16 buf_len, void *cookie, u8 notify_fw)
1631 {
1632         struct qed_hwfn *p_hwfn = cxt;
1633         struct core_rx_bd_with_buff_len *p_curb = NULL;
1634         struct qed_ll2_rx_packet *p_curp = NULL;
1635         struct qed_ll2_info *p_ll2_conn;
1636         struct qed_ll2_rx_queue *p_rx;
1637         unsigned long flags;
1638         void *p_data;
1639         int rc = 0;
1640
1641         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1642         if (!p_ll2_conn)
1643                 return -EINVAL;
1644         p_rx = &p_ll2_conn->rx_queue;
1645
1646         spin_lock_irqsave(&p_rx->lock, flags);
1647         if (!list_empty(&p_rx->free_descq))
1648                 p_curp = list_first_entry(&p_rx->free_descq,
1649                                           struct qed_ll2_rx_packet, list_entry);
1650         if (p_curp) {
1651                 if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
1652                     qed_chain_get_elem_left(&p_rx->rcq_chain)) {
1653                         p_data = qed_chain_produce(&p_rx->rxq_chain);
1654                         p_curb = (struct core_rx_bd_with_buff_len *)p_data;
1655                         qed_chain_produce(&p_rx->rcq_chain);
1656                 }
1657         }
1658
1659         /* If we're lacking entires, let's try to flush buffers to FW */
1660         if (!p_curp || !p_curb) {
1661                 rc = -EBUSY;
1662                 p_curp = NULL;
1663                 goto out_notify;
1664         }
1665
1666         /* We have an Rx packet we can fill */
1667         DMA_REGPAIR_LE(p_curb->addr, addr);
1668         p_curb->buff_length = cpu_to_le16(buf_len);
1669         p_curp->rx_buf_addr = addr;
1670         p_curp->cookie = cookie;
1671         p_curp->rxq_bd = p_curb;
1672         p_curp->buf_length = buf_len;
1673         list_del(&p_curp->list_entry);
1674
1675         /* Check if we only want to enqueue this packet without informing FW */
1676         if (!notify_fw) {
1677                 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
1678                 goto out;
1679         }
1680
1681 out_notify:
1682         qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
1683 out:
1684         spin_unlock_irqrestore(&p_rx->lock, flags);
1685         return rc;
1686 }
1687
1688 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
1689                                           struct qed_ll2_tx_queue *p_tx,
1690                                           struct qed_ll2_tx_packet *p_curp,
1691                                           struct qed_ll2_tx_pkt_info *pkt,
1692                                           u8 notify_fw)
1693 {
1694         list_del(&p_curp->list_entry);
1695         p_curp->cookie = pkt->cookie;
1696         p_curp->bd_used = pkt->num_of_bds;
1697         p_curp->notify_fw = notify_fw;
1698         p_tx->cur_send_packet = p_curp;
1699         p_tx->cur_send_frag_num = 0;
1700
1701         p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag;
1702         p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len;
1703         p_tx->cur_send_frag_num++;
1704 }
1705
1706 static void
1707 qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
1708                                  struct qed_ll2_info *p_ll2,
1709                                  struct qed_ll2_tx_packet *p_curp,
1710                                  struct qed_ll2_tx_pkt_info *pkt)
1711 {
1712         struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
1713         u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
1714         struct core_tx_bd *start_bd = NULL;
1715         enum core_roce_flavor_type roce_flavor;
1716         enum core_tx_dest tx_dest;
1717         u16 bd_data = 0, frag_idx;
1718
1719         roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE
1720                                                              : CORE_RROCE;
1721
1722         switch (pkt->tx_dest) {
1723         case QED_LL2_TX_DEST_NW:
1724                 tx_dest = CORE_TX_DEST_NW;
1725                 break;
1726         case QED_LL2_TX_DEST_LB:
1727                 tx_dest = CORE_TX_DEST_LB;
1728                 break;
1729         case QED_LL2_TX_DEST_DROP:
1730                 tx_dest = CORE_TX_DEST_DROP;
1731                 break;
1732         default:
1733                 tx_dest = CORE_TX_DEST_LB;
1734                 break;
1735         }
1736
1737         start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1738         if (QED_IS_IWARP_PERSONALITY(p_hwfn) &&
1739             p_ll2->input.conn_type == QED_LL2_TYPE_OOO) {
1740                 start_bd->nw_vlan_or_lb_echo =
1741                     cpu_to_le16(IWARP_LL2_IN_ORDER_TX_QUEUE);
1742         } else {
1743                 start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan);
1744                 if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
1745                     p_ll2->input.conn_type == QED_LL2_TYPE_FCOE)
1746                         pkt->remove_stag = true;
1747         }
1748
1749         SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W,
1750                   cpu_to_le16(pkt->l4_hdr_offset_w));
1751         SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest);
1752         bd_data |= pkt->bd_flags;
1753         SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1);
1754         SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds);
1755         SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor);
1756         SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_CSUM, !!(pkt->enable_ip_cksum));
1757         SET_FIELD(bd_data, CORE_TX_BD_DATA_L4_CSUM, !!(pkt->enable_l4_cksum));
1758         SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_LEN, !!(pkt->calc_ip_len));
1759         SET_FIELD(bd_data, CORE_TX_BD_DATA_DISABLE_STAG_INSERTION,
1760                   !!(pkt->remove_stag));
1761
1762         start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data);
1763         DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag);
1764         start_bd->nbytes = cpu_to_le16(pkt->first_frag_len);
1765
1766         DP_VERBOSE(p_hwfn,
1767                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1768                    "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",
1769                    p_ll2->queue_id,
1770                    p_ll2->cid,
1771                    p_ll2->input.conn_type,
1772                    prod_idx,
1773                    pkt->first_frag_len,
1774                    pkt->num_of_bds,
1775                    le32_to_cpu(start_bd->addr.hi),
1776                    le32_to_cpu(start_bd->addr.lo));
1777
1778         if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds)
1779                 return;
1780
1781         /* Need to provide the packet with additional BDs for frags */
1782         for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
1783              frag_idx < pkt->num_of_bds; frag_idx++) {
1784                 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
1785
1786                 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1787                 (*p_bd)->bd_data.as_bitfield = 0;
1788                 (*p_bd)->bitfield1 = 0;
1789                 p_curp->bds_set[frag_idx].tx_frag = 0;
1790                 p_curp->bds_set[frag_idx].frag_len = 0;
1791         }
1792 }
1793
1794 /* This should be called while the Txq spinlock is being held */
1795 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
1796                                      struct qed_ll2_info *p_ll2_conn)
1797 {
1798         bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
1799         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1800         struct qed_ll2_tx_packet *p_pkt = NULL;
1801         u16 bd_prod;
1802
1803         /* If there are missing BDs, don't do anything now */
1804         if (p_ll2_conn->tx_queue.cur_send_frag_num !=
1805             p_ll2_conn->tx_queue.cur_send_packet->bd_used)
1806                 return;
1807
1808         /* Push the current packet to the list and clean after it */
1809         list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
1810                       &p_ll2_conn->tx_queue.sending_descq);
1811         p_ll2_conn->tx_queue.cur_send_packet = NULL;
1812         p_ll2_conn->tx_queue.cur_send_frag_num = 0;
1813
1814         /* Notify FW of packet only if requested to */
1815         if (!b_notify)
1816                 return;
1817
1818         bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
1819
1820         while (!list_empty(&p_tx->sending_descq)) {
1821                 p_pkt = list_first_entry(&p_tx->sending_descq,
1822                                          struct qed_ll2_tx_packet, list_entry);
1823                 if (!p_pkt)
1824                         break;
1825
1826                 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq);
1827         }
1828
1829         p_tx->db_msg.spq_prod = cpu_to_le16(bd_prod);
1830
1831         /* Make sure the BDs data is updated before ringing the doorbell */
1832         wmb();
1833
1834         DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&p_tx->db_msg));
1835
1836         DP_VERBOSE(p_hwfn,
1837                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1838                    "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
1839                    p_ll2_conn->queue_id,
1840                    p_ll2_conn->cid,
1841                    p_ll2_conn->input.conn_type, p_tx->db_msg.spq_prod);
1842 }
1843
1844 int qed_ll2_prepare_tx_packet(void *cxt,
1845                               u8 connection_handle,
1846                               struct qed_ll2_tx_pkt_info *pkt,
1847                               bool notify_fw)
1848 {
1849         struct qed_hwfn *p_hwfn = cxt;
1850         struct qed_ll2_tx_packet *p_curp = NULL;
1851         struct qed_ll2_info *p_ll2_conn = NULL;
1852         struct qed_ll2_tx_queue *p_tx;
1853         struct qed_chain *p_tx_chain;
1854         unsigned long flags;
1855         int rc = 0;
1856
1857         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1858         if (!p_ll2_conn)
1859                 return -EINVAL;
1860         p_tx = &p_ll2_conn->tx_queue;
1861         p_tx_chain = &p_tx->txq_chain;
1862
1863         if (pkt->num_of_bds > p_ll2_conn->input.tx_max_bds_per_packet)
1864                 return -EIO;
1865
1866         spin_lock_irqsave(&p_tx->lock, flags);
1867         if (p_tx->cur_send_packet) {
1868                 rc = -EEXIST;
1869                 goto out;
1870         }
1871
1872         /* Get entry, but only if we have tx elements for it */
1873         if (!list_empty(&p_tx->free_descq))
1874                 p_curp = list_first_entry(&p_tx->free_descq,
1875                                           struct qed_ll2_tx_packet, list_entry);
1876         if (p_curp && qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds)
1877                 p_curp = NULL;
1878
1879         if (!p_curp) {
1880                 rc = -EBUSY;
1881                 goto out;
1882         }
1883
1884         /* Prepare packet and BD, and perhaps send a doorbell to FW */
1885         qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw);
1886
1887         qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt);
1888
1889         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1890
1891 out:
1892         spin_unlock_irqrestore(&p_tx->lock, flags);
1893         return rc;
1894 }
1895
1896 int qed_ll2_set_fragment_of_tx_packet(void *cxt,
1897                                       u8 connection_handle,
1898                                       dma_addr_t addr, u16 nbytes)
1899 {
1900         struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
1901         struct qed_hwfn *p_hwfn = cxt;
1902         struct qed_ll2_info *p_ll2_conn = NULL;
1903         u16 cur_send_frag_num = 0;
1904         struct core_tx_bd *p_bd;
1905         unsigned long flags;
1906
1907         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1908         if (!p_ll2_conn)
1909                 return -EINVAL;
1910
1911         if (!p_ll2_conn->tx_queue.cur_send_packet)
1912                 return -EINVAL;
1913
1914         p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
1915         cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
1916
1917         if (cur_send_frag_num >= p_cur_send_packet->bd_used)
1918                 return -EINVAL;
1919
1920         /* Fill the BD information, and possibly notify FW */
1921         p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
1922         DMA_REGPAIR_LE(p_bd->addr, addr);
1923         p_bd->nbytes = cpu_to_le16(nbytes);
1924         p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
1925         p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
1926
1927         p_ll2_conn->tx_queue.cur_send_frag_num++;
1928
1929         spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
1930         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1931         spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
1932
1933         return 0;
1934 }
1935
1936 int qed_ll2_terminate_connection(void *cxt, u8 connection_handle)
1937 {
1938         struct qed_hwfn *p_hwfn = cxt;
1939         struct qed_ll2_info *p_ll2_conn = NULL;
1940         int rc = -EINVAL;
1941         struct qed_ptt *p_ptt;
1942
1943         p_ptt = qed_ptt_acquire(p_hwfn);
1944         if (!p_ptt)
1945                 return -EAGAIN;
1946
1947         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1948         if (!p_ll2_conn) {
1949                 rc = -EINVAL;
1950                 goto out;
1951         }
1952
1953         /* Stop Tx & Rx of connection, if needed */
1954         if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
1955                 p_ll2_conn->tx_queue.b_cb_registered = false;
1956                 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
1957                 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
1958                 if (rc)
1959                         goto out;
1960
1961                 qed_ll2_txq_flush(p_hwfn, connection_handle);
1962                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
1963         }
1964
1965         if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
1966                 p_ll2_conn->rx_queue.b_cb_registered = false;
1967                 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
1968                 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
1969                 if (rc)
1970                         goto out;
1971
1972                 qed_ll2_rxq_flush(p_hwfn, connection_handle);
1973                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
1974         }
1975
1976         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
1977                 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1978
1979         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1980                 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
1981                         qed_llh_remove_protocol_filter(p_hwfn->cdev, 0,
1982                                                        QED_LLH_FILTER_ETHERTYPE,
1983                                                        ETH_P_FCOE, 0);
1984                 qed_llh_remove_protocol_filter(p_hwfn->cdev, 0,
1985                                                QED_LLH_FILTER_ETHERTYPE,
1986                                                ETH_P_FIP, 0);
1987         }
1988
1989 out:
1990         qed_ptt_release(p_hwfn, p_ptt);
1991         return rc;
1992 }
1993
1994 static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn,
1995                                            struct qed_ll2_info *p_ll2_conn)
1996 {
1997         struct qed_ooo_buffer *p_buffer;
1998
1999         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
2000                 return;
2001
2002         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
2003         while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
2004                                                    p_hwfn->p_ooo_info))) {
2005                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
2006                                   p_buffer->rx_buffer_size,
2007                                   p_buffer->rx_buffer_virt_addr,
2008                                   p_buffer->rx_buffer_phys_addr);
2009                 kfree(p_buffer);
2010         }
2011 }
2012
2013 void qed_ll2_release_connection(void *cxt, u8 connection_handle)
2014 {
2015         struct qed_hwfn *p_hwfn = cxt;
2016         struct qed_ll2_info *p_ll2_conn = NULL;
2017
2018         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2019         if (!p_ll2_conn)
2020                 return;
2021
2022         kfree(p_ll2_conn->tx_queue.descq_mem);
2023         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
2024
2025         kfree(p_ll2_conn->rx_queue.descq_array);
2026         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
2027         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
2028
2029         qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
2030
2031         qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn);
2032
2033         mutex_lock(&p_ll2_conn->mutex);
2034         p_ll2_conn->b_active = false;
2035         mutex_unlock(&p_ll2_conn->mutex);
2036 }
2037
2038 int qed_ll2_alloc(struct qed_hwfn *p_hwfn)
2039 {
2040         struct qed_ll2_info *p_ll2_connections;
2041         u8 i;
2042
2043         /* Allocate LL2's set struct */
2044         p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
2045                                     sizeof(struct qed_ll2_info), GFP_KERNEL);
2046         if (!p_ll2_connections) {
2047                 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
2048                 return -ENOMEM;
2049         }
2050
2051         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2052                 p_ll2_connections[i].my_id = i;
2053
2054         p_hwfn->p_ll2_info = p_ll2_connections;
2055         return 0;
2056 }
2057
2058 void qed_ll2_setup(struct qed_hwfn *p_hwfn)
2059 {
2060         int i;
2061
2062         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2063                 mutex_init(&p_hwfn->p_ll2_info[i].mutex);
2064 }
2065
2066 void qed_ll2_free(struct qed_hwfn *p_hwfn)
2067 {
2068         if (!p_hwfn->p_ll2_info)
2069                 return;
2070
2071         kfree(p_hwfn->p_ll2_info);
2072         p_hwfn->p_ll2_info = NULL;
2073 }
2074
2075 static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn,
2076                                     struct qed_ptt *p_ptt,
2077                                     struct qed_ll2_stats *p_stats)
2078 {
2079         struct core_ll2_port_stats port_stats;
2080
2081         memset(&port_stats, 0, sizeof(port_stats));
2082         qed_memcpy_from(p_hwfn, p_ptt, &port_stats,
2083                         BAR0_MAP_REG_TSDM_RAM +
2084                         TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)),
2085                         sizeof(port_stats));
2086
2087         p_stats->gsi_invalid_hdr += HILO_64_REGPAIR(port_stats.gsi_invalid_hdr);
2088         p_stats->gsi_invalid_pkt_length +=
2089             HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length);
2090         p_stats->gsi_unsupported_pkt_typ +=
2091             HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ);
2092         p_stats->gsi_crcchksm_error +=
2093             HILO_64_REGPAIR(port_stats.gsi_crcchksm_error);
2094 }
2095
2096 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,
2097                                 struct qed_ptt *p_ptt,
2098                                 struct qed_ll2_info *p_ll2_conn,
2099                                 struct qed_ll2_stats *p_stats)
2100 {
2101         struct core_ll2_tstorm_per_queue_stat tstats;
2102         u8 qid = p_ll2_conn->queue_id;
2103         u32 tstats_addr;
2104
2105         memset(&tstats, 0, sizeof(tstats));
2106         tstats_addr = BAR0_MAP_REG_TSDM_RAM +
2107                       CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
2108         qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
2109
2110         p_stats->packet_too_big_discard +=
2111                         HILO_64_REGPAIR(tstats.packet_too_big_discard);
2112         p_stats->no_buff_discard += HILO_64_REGPAIR(tstats.no_buff_discard);
2113 }
2114
2115 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
2116                                 struct qed_ptt *p_ptt,
2117                                 struct qed_ll2_info *p_ll2_conn,
2118                                 struct qed_ll2_stats *p_stats)
2119 {
2120         struct core_ll2_ustorm_per_queue_stat ustats;
2121         u8 qid = p_ll2_conn->queue_id;
2122         u32 ustats_addr;
2123
2124         memset(&ustats, 0, sizeof(ustats));
2125         ustats_addr = BAR0_MAP_REG_USDM_RAM +
2126                       CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
2127         qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
2128
2129         p_stats->rcv_ucast_bytes += HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
2130         p_stats->rcv_mcast_bytes += HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
2131         p_stats->rcv_bcast_bytes += HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
2132         p_stats->rcv_ucast_pkts += HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
2133         p_stats->rcv_mcast_pkts += HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
2134         p_stats->rcv_bcast_pkts += HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
2135 }
2136
2137 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
2138                                 struct qed_ptt *p_ptt,
2139                                 struct qed_ll2_info *p_ll2_conn,
2140                                 struct qed_ll2_stats *p_stats)
2141 {
2142         struct core_ll2_pstorm_per_queue_stat pstats;
2143         u8 stats_id = p_ll2_conn->tx_stats_id;
2144         u32 pstats_addr;
2145
2146         memset(&pstats, 0, sizeof(pstats));
2147         pstats_addr = BAR0_MAP_REG_PSDM_RAM +
2148                       CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
2149         qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
2150
2151         p_stats->sent_ucast_bytes += HILO_64_REGPAIR(pstats.sent_ucast_bytes);
2152         p_stats->sent_mcast_bytes += HILO_64_REGPAIR(pstats.sent_mcast_bytes);
2153         p_stats->sent_bcast_bytes += HILO_64_REGPAIR(pstats.sent_bcast_bytes);
2154         p_stats->sent_ucast_pkts += HILO_64_REGPAIR(pstats.sent_ucast_pkts);
2155         p_stats->sent_mcast_pkts += HILO_64_REGPAIR(pstats.sent_mcast_pkts);
2156         p_stats->sent_bcast_pkts += HILO_64_REGPAIR(pstats.sent_bcast_pkts);
2157 }
2158
2159 static int __qed_ll2_get_stats(void *cxt, u8 connection_handle,
2160                                struct qed_ll2_stats *p_stats)
2161 {
2162         struct qed_hwfn *p_hwfn = cxt;
2163         struct qed_ll2_info *p_ll2_conn = NULL;
2164         struct qed_ptt *p_ptt;
2165
2166         if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
2167             !p_hwfn->p_ll2_info)
2168                 return -EINVAL;
2169
2170         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
2171
2172         p_ptt = qed_ptt_acquire(p_hwfn);
2173         if (!p_ptt) {
2174                 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
2175                 return -EINVAL;
2176         }
2177
2178         if (p_ll2_conn->input.gsi_enable)
2179                 _qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats);
2180
2181         _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2182
2183         _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2184
2185         if (p_ll2_conn->tx_stats_en)
2186                 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2187
2188         qed_ptt_release(p_hwfn, p_ptt);
2189
2190         return 0;
2191 }
2192
2193 int qed_ll2_get_stats(void *cxt,
2194                       u8 connection_handle, struct qed_ll2_stats *p_stats)
2195 {
2196         memset(p_stats, 0, sizeof(*p_stats));
2197         return __qed_ll2_get_stats(cxt, connection_handle, p_stats);
2198 }
2199
2200 static void qed_ll2b_release_rx_packet(void *cxt,
2201                                        u8 connection_handle,
2202                                        void *cookie,
2203                                        dma_addr_t rx_buf_addr,
2204                                        bool b_last_packet)
2205 {
2206         struct qed_hwfn *p_hwfn = cxt;
2207
2208         qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie);
2209 }
2210
2211 static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
2212                                     const struct qed_ll2_cb_ops *ops,
2213                                     void *cookie)
2214 {
2215         cdev->ll2->cbs = ops;
2216         cdev->ll2->cb_cookie = cookie;
2217 }
2218
2219 struct qed_ll2_cbs ll2_cbs = {
2220         .rx_comp_cb = &qed_ll2b_complete_rx_packet,
2221         .rx_release_cb = &qed_ll2b_release_rx_packet,
2222         .tx_comp_cb = &qed_ll2b_complete_tx_packet,
2223         .tx_release_cb = &qed_ll2b_complete_tx_packet,
2224 };
2225
2226 static void qed_ll2_set_conn_data(struct qed_hwfn *p_hwfn,
2227                                   struct qed_ll2_acquire_data *data,
2228                                   struct qed_ll2_params *params,
2229                                   enum qed_ll2_conn_type conn_type,
2230                                   u8 *handle, bool lb)
2231 {
2232         memset(data, 0, sizeof(*data));
2233
2234         data->input.conn_type = conn_type;
2235         data->input.mtu = params->mtu;
2236         data->input.rx_num_desc = QED_LL2_RX_SIZE;
2237         data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets;
2238         data->input.rx_vlan_removal_en = params->rx_vlan_stripping;
2239         data->input.tx_num_desc = QED_LL2_TX_SIZE;
2240         data->p_connection_handle = handle;
2241         data->cbs = &ll2_cbs;
2242         ll2_cbs.cookie = p_hwfn;
2243
2244         if (lb) {
2245                 data->input.tx_tc = PKT_LB_TC;
2246                 data->input.tx_dest = QED_LL2_TX_DEST_LB;
2247         } else {
2248                 data->input.tx_tc = 0;
2249                 data->input.tx_dest = QED_LL2_TX_DEST_NW;
2250         }
2251 }
2252
2253 static int qed_ll2_start_ooo(struct qed_hwfn *p_hwfn,
2254                              struct qed_ll2_params *params)
2255 {
2256         u8 *handle = &p_hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
2257         struct qed_ll2_acquire_data data;
2258         int rc;
2259
2260         qed_ll2_set_conn_data(p_hwfn, &data, params,
2261                               QED_LL2_TYPE_OOO, handle, true);
2262
2263         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2264         if (rc) {
2265                 DP_INFO(p_hwfn, "Failed to acquire LL2 OOO connection\n");
2266                 goto out;
2267         }
2268
2269         rc = qed_ll2_establish_connection(p_hwfn, *handle);
2270         if (rc) {
2271                 DP_INFO(p_hwfn, "Failed to establish LL2 OOO connection\n");
2272                 goto fail;
2273         }
2274
2275         return 0;
2276
2277 fail:
2278         qed_ll2_release_connection(p_hwfn, *handle);
2279 out:
2280         *handle = QED_LL2_UNUSED_HANDLE;
2281         return rc;
2282 }
2283
2284 static bool qed_ll2_is_storage_eng1(struct qed_dev *cdev)
2285 {
2286         return (QED_IS_FCOE_PERSONALITY(QED_LEADING_HWFN(cdev)) ||
2287                 QED_IS_ISCSI_PERSONALITY(QED_LEADING_HWFN(cdev))) &&
2288                 (QED_AFFIN_HWFN(cdev) != QED_LEADING_HWFN(cdev));
2289 }
2290
2291 static int __qed_ll2_stop(struct qed_hwfn *p_hwfn)
2292 {
2293         struct qed_dev *cdev = p_hwfn->cdev;
2294         int rc;
2295
2296         rc = qed_ll2_terminate_connection(p_hwfn, cdev->ll2->handle);
2297         if (rc)
2298                 DP_INFO(cdev, "Failed to terminate LL2 connection\n");
2299
2300         qed_ll2_release_connection(p_hwfn, cdev->ll2->handle);
2301
2302         return rc;
2303 }
2304
2305 static int qed_ll2_stop(struct qed_dev *cdev)
2306 {
2307         bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2308         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2309         int rc = 0, rc2 = 0;
2310
2311         if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
2312                 return 0;
2313
2314         qed_llh_remove_mac_filter(cdev, 0, cdev->ll2_mac_address);
2315         eth_zero_addr(cdev->ll2_mac_address);
2316
2317         if (QED_IS_ISCSI_PERSONALITY(p_hwfn))
2318                 qed_ll2_stop_ooo(p_hwfn);
2319
2320         /* In CMT mode, LL2 is always started on engine 0 for a storage PF */
2321         if (b_is_storage_eng1) {
2322                 rc2 = __qed_ll2_stop(QED_LEADING_HWFN(cdev));
2323                 if (rc2)
2324                         DP_NOTICE(QED_LEADING_HWFN(cdev),
2325                                   "Failed to stop LL2 on engine 0\n");
2326         }
2327
2328         rc = __qed_ll2_stop(p_hwfn);
2329         if (rc)
2330                 DP_NOTICE(p_hwfn, "Failed to stop LL2\n");
2331
2332         qed_ll2_kill_buffers(cdev);
2333
2334         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2335
2336         return rc | rc2;
2337 }
2338
2339 static int __qed_ll2_start(struct qed_hwfn *p_hwfn,
2340                            struct qed_ll2_params *params)
2341 {
2342         struct qed_ll2_buffer *buffer, *tmp_buffer;
2343         struct qed_dev *cdev = p_hwfn->cdev;
2344         enum qed_ll2_conn_type conn_type;
2345         struct qed_ll2_acquire_data data;
2346         int rc, rx_cnt;
2347
2348         switch (p_hwfn->hw_info.personality) {
2349         case QED_PCI_FCOE:
2350                 conn_type = QED_LL2_TYPE_FCOE;
2351                 break;
2352         case QED_PCI_ISCSI:
2353                 conn_type = QED_LL2_TYPE_ISCSI;
2354                 break;
2355         case QED_PCI_ETH_ROCE:
2356                 conn_type = QED_LL2_TYPE_ROCE;
2357                 break;
2358         default:
2359
2360                 conn_type = QED_LL2_TYPE_TEST;
2361         }
2362
2363         qed_ll2_set_conn_data(p_hwfn, &data, params, conn_type,
2364                               &cdev->ll2->handle, false);
2365
2366         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2367         if (rc) {
2368                 DP_INFO(p_hwfn, "Failed to acquire LL2 connection\n");
2369                 return rc;
2370         }
2371
2372         rc = qed_ll2_establish_connection(p_hwfn, cdev->ll2->handle);
2373         if (rc) {
2374                 DP_INFO(p_hwfn, "Failed to establish LL2 connection\n");
2375                 goto release_conn;
2376         }
2377
2378         /* Post all Rx buffers to FW */
2379         spin_lock_bh(&cdev->ll2->lock);
2380         rx_cnt = cdev->ll2->rx_cnt;
2381         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) {
2382                 rc = qed_ll2_post_rx_buffer(p_hwfn,
2383                                             cdev->ll2->handle,
2384                                             buffer->phys_addr, 0, buffer, 1);
2385                 if (rc) {
2386                         DP_INFO(p_hwfn,
2387                                 "Failed to post an Rx buffer; Deleting it\n");
2388                         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
2389                                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
2390                         kfree(buffer->data);
2391                         list_del(&buffer->list);
2392                         kfree(buffer);
2393                 } else {
2394                         rx_cnt++;
2395                 }
2396         }
2397         spin_unlock_bh(&cdev->ll2->lock);
2398
2399         if (rx_cnt == cdev->ll2->rx_cnt) {
2400                 DP_NOTICE(p_hwfn, "Failed passing even a single Rx buffer\n");
2401                 goto terminate_conn;
2402         }
2403         cdev->ll2->rx_cnt = rx_cnt;
2404
2405         return 0;
2406
2407 terminate_conn:
2408         qed_ll2_terminate_connection(p_hwfn, cdev->ll2->handle);
2409 release_conn:
2410         qed_ll2_release_connection(p_hwfn, cdev->ll2->handle);
2411         return rc;
2412 }
2413
2414 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
2415 {
2416         bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2417         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2418         struct qed_ll2_buffer *buffer;
2419         int rx_num_desc, i, rc;
2420
2421         if (!is_valid_ether_addr(params->ll2_mac_address)) {
2422                 DP_NOTICE(cdev, "Invalid Ethernet address\n");
2423                 return -EINVAL;
2424         }
2425
2426         WARN_ON(!cdev->ll2->cbs);
2427
2428         /* Initialize LL2 locks & lists */
2429         INIT_LIST_HEAD(&cdev->ll2->list);
2430         spin_lock_init(&cdev->ll2->lock);
2431
2432         cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
2433                              L1_CACHE_BYTES + params->mtu;
2434
2435         /* Allocate memory for LL2.
2436          * In CMT mode, in case of a storage PF which is affintized to engine 1,
2437          * LL2 is started also on engine 0 and thus we need twofold buffers.
2438          */
2439         rx_num_desc = QED_LL2_RX_SIZE * (b_is_storage_eng1 ? 2 : 1);
2440         DP_INFO(cdev, "Allocating %d LL2 buffers of size %08x bytes\n",
2441                 rx_num_desc, cdev->ll2->rx_size);
2442         for (i = 0; i < rx_num_desc; i++) {
2443                 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2444                 if (!buffer) {
2445                         DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
2446                         rc = -ENOMEM;
2447                         goto err0;
2448                 }
2449
2450                 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
2451                                           &buffer->phys_addr);
2452                 if (rc) {
2453                         kfree(buffer);
2454                         goto err0;
2455                 }
2456
2457                 list_add_tail(&buffer->list, &cdev->ll2->list);
2458         }
2459
2460         rc = __qed_ll2_start(p_hwfn, params);
2461         if (rc) {
2462                 DP_NOTICE(cdev, "Failed to start LL2\n");
2463                 goto err0;
2464         }
2465
2466         /* In CMT mode, always need to start LL2 on engine 0 for a storage PF,
2467          * since broadcast/mutlicast packets are routed to engine 0.
2468          */
2469         if (b_is_storage_eng1) {
2470                 rc = __qed_ll2_start(QED_LEADING_HWFN(cdev), params);
2471                 if (rc) {
2472                         DP_NOTICE(QED_LEADING_HWFN(cdev),
2473                                   "Failed to start LL2 on engine 0\n");
2474                         goto err1;
2475                 }
2476         }
2477
2478         if (QED_IS_ISCSI_PERSONALITY(p_hwfn)) {
2479                 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n");
2480                 rc = qed_ll2_start_ooo(p_hwfn, params);
2481                 if (rc) {
2482                         DP_NOTICE(cdev, "Failed to start OOO LL2\n");
2483                         goto err2;
2484                 }
2485         }
2486
2487         rc = qed_llh_add_mac_filter(cdev, 0, params->ll2_mac_address);
2488         if (rc) {
2489                 DP_NOTICE(cdev, "Failed to add an LLH filter\n");
2490                 goto err3;
2491         }
2492
2493         ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
2494
2495         return 0;
2496
2497 err3:
2498         if (QED_IS_ISCSI_PERSONALITY(p_hwfn))
2499                 qed_ll2_stop_ooo(p_hwfn);
2500 err2:
2501         if (b_is_storage_eng1)
2502                 __qed_ll2_stop(QED_LEADING_HWFN(cdev));
2503 err1:
2504         __qed_ll2_stop(p_hwfn);
2505 err0:
2506         qed_ll2_kill_buffers(cdev);
2507         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2508         return rc;
2509 }
2510
2511 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb,
2512                               unsigned long xmit_flags)
2513 {
2514         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2515         struct qed_ll2_tx_pkt_info pkt;
2516         const skb_frag_t *frag;
2517         u8 flags = 0, nr_frags;
2518         int rc = -EINVAL, i;
2519         dma_addr_t mapping;
2520         u16 vlan = 0;
2521
2522         if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
2523                 DP_INFO(cdev, "Cannot transmit a checksummed packet\n");
2524                 return -EINVAL;
2525         }
2526
2527         /* Cache number of fragments from SKB since SKB may be freed by
2528          * the completion routine after calling qed_ll2_prepare_tx_packet()
2529          */
2530         nr_frags = skb_shinfo(skb)->nr_frags;
2531
2532         if (1 + nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) {
2533                 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
2534                        1 + nr_frags);
2535                 return -EINVAL;
2536         }
2537
2538         mapping = dma_map_single(&cdev->pdev->dev, skb->data,
2539                                  skb->len, DMA_TO_DEVICE);
2540         if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2541                 DP_NOTICE(cdev, "SKB mapping failed\n");
2542                 return -EINVAL;
2543         }
2544
2545         /* Request HW to calculate IP csum */
2546         if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
2547               ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
2548                 flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT);
2549
2550         if (skb_vlan_tag_present(skb)) {
2551                 vlan = skb_vlan_tag_get(skb);
2552                 flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT);
2553         }
2554
2555         memset(&pkt, 0, sizeof(pkt));
2556         pkt.num_of_bds = 1 + nr_frags;
2557         pkt.vlan = vlan;
2558         pkt.bd_flags = flags;
2559         pkt.tx_dest = QED_LL2_TX_DEST_NW;
2560         pkt.first_frag = mapping;
2561         pkt.first_frag_len = skb->len;
2562         pkt.cookie = skb;
2563         if (test_bit(QED_MF_UFP_SPECIFIC, &cdev->mf_bits) &&
2564             test_bit(QED_LL2_XMIT_FLAGS_FIP_DISCOVERY, &xmit_flags))
2565                 pkt.remove_stag = true;
2566
2567         /* qed_ll2_prepare_tx_packet() may actually send the packet if
2568          * there are no fragments in the skb and subsequently the completion
2569          * routine may run and free the SKB, so no dereferencing the SKB
2570          * beyond this point unless skb has any fragments.
2571          */
2572         rc = qed_ll2_prepare_tx_packet(p_hwfn, cdev->ll2->handle,
2573                                        &pkt, 1);
2574         if (rc)
2575                 goto err;
2576
2577         for (i = 0; i < nr_frags; i++) {
2578                 frag = &skb_shinfo(skb)->frags[i];
2579
2580                 mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0,
2581                                            skb_frag_size(frag), DMA_TO_DEVICE);
2582
2583                 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2584                         DP_NOTICE(cdev,
2585                                   "Unable to map frag - dropping packet\n");
2586                         rc = -ENOMEM;
2587                         goto err;
2588                 }
2589
2590                 rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn,
2591                                                        cdev->ll2->handle,
2592                                                        mapping,
2593                                                        skb_frag_size(frag));
2594
2595                 /* if failed not much to do here, partial packet has been posted
2596                  * we can't free memory, will need to wait for completion
2597                  */
2598                 if (rc)
2599                         goto err2;
2600         }
2601
2602         return 0;
2603
2604 err:
2605         dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE);
2606 err2:
2607         return rc;
2608 }
2609
2610 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats)
2611 {
2612         bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2613         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2614         int rc;
2615
2616         if (!cdev->ll2)
2617                 return -EINVAL;
2618
2619         rc = qed_ll2_get_stats(p_hwfn, cdev->ll2->handle, stats);
2620         if (rc) {
2621                 DP_NOTICE(p_hwfn, "Failed to get LL2 stats\n");
2622                 return rc;
2623         }
2624
2625         /* In CMT mode, LL2 is always started on engine 0 for a storage PF */
2626         if (b_is_storage_eng1) {
2627                 rc = __qed_ll2_get_stats(QED_LEADING_HWFN(cdev),
2628                                          cdev->ll2->handle, stats);
2629                 if (rc) {
2630                         DP_NOTICE(QED_LEADING_HWFN(cdev),
2631                                   "Failed to get LL2 stats on engine 0\n");
2632                         return rc;
2633                 }
2634         }
2635
2636         return 0;
2637 }
2638
2639 const struct qed_ll2_ops qed_ll2_ops_pass = {
2640         .start = &qed_ll2_start,
2641         .stop = &qed_ll2_stop,
2642         .start_xmit = &qed_ll2_start_xmit,
2643         .register_cb_ops = &qed_ll2_register_cb_ops,
2644         .get_stats = &qed_ll2_stats,
2645 };
2646
2647 int qed_ll2_alloc_if(struct qed_dev *cdev)
2648 {
2649         cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL);
2650         return cdev->ll2 ? 0 : -ENOMEM;
2651 }
2652
2653 void qed_ll2_dealloc_if(struct qed_dev *cdev)
2654 {
2655         kfree(cdev->ll2);
2656         cdev->ll2 = NULL;
2657 }