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

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
   2 /* QLogic qed NIC Driver
   3  * Copyright (c) 2015-2017  QLogic Corporation
   4  * Copyright (c) 2019-2020 Marvell International Ltd.
   5  */
   6
   7 #include <linux/types.h>
   8 #include <asm/byteorder.h>
   9 #include <linux/dma-mapping.h>
  10 #include <linux/if_vlan.h>
  11 #include <linux/kernel.h>
  12 #include <linux/pci.h>
  13 #include <linux/slab.h>
  14 #include <linux/stddef.h>
  15 #include <linux/workqueue.h>
  16 #include <net/ipv6.h>
  17 #include <linux/bitops.h>
  18 #include <linux/delay.h>
  19 #include <linux/errno.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/io.h>
  22 #include <linux/list.h>
  23 #include <linux/mutex.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/string.h>
  26 #include <linux/qed/qed_ll2_if.h>
  27 #include "qed.h"
  28 #include "qed_cxt.h"
  29 #include "qed_dev_api.h"
  30 #include "qed_hsi.h"
  31 #include "qed_hw.h"
  32 #include "qed_int.h"
  33 #include "qed_ll2.h"
  34 #include "qed_mcp.h"
  35 #include "qed_ooo.h"
  36 #include "qed_reg_addr.h"
  37 #include "qed_sp.h"
  38 #include "qed_rdma.h"
  39
  40 #define QED_LL2_RX_REGISTERED(ll2)      ((ll2)->rx_queue.b_cb_registered)
  41 #define QED_LL2_TX_REGISTERED(ll2)      ((ll2)->tx_queue.b_cb_registered)
  42
  43 #define QED_LL2_TX_SIZE (256)
  44 #define QED_LL2_RX_SIZE (4096)
  45
  46 struct qed_cb_ll2_info {
  47         int rx_cnt;
  48         u32 rx_size;
  49         u8 handle;
  50
  51         /* Lock protecting LL2 buffer lists in sleepless context */
  52         spinlock_t lock;
  53         struct list_head list;
  54
  55         const struct qed_ll2_cb_ops *cbs;
  56         void *cb_cookie;
  57 };
  58
  59 struct qed_ll2_buffer {
  60         struct list_head list;
  61         void *data;
  62         dma_addr_t phys_addr;
  63 };
  64
  65 static void qed_ll2b_complete_tx_packet(void *cxt,
  66                                         u8 connection_handle,
  67                                         void *cookie,
  68                                         dma_addr_t first_frag_addr,
  69                                         bool b_last_fragment,
  70                                         bool b_last_packet)
  71 {
  72         struct qed_hwfn *p_hwfn = cxt;
  73         struct qed_dev *cdev = p_hwfn->cdev;
  74         struct sk_buff *skb = cookie;
  75
  76         /* All we need to do is release the mapping */
  77         dma_unmap_single(&p_hwfn->cdev->pdev->dev, first_frag_addr,
  78                          skb_headlen(skb), DMA_TO_DEVICE);
  79
  80         if (cdev->ll2->cbs && cdev->ll2->cbs->tx_cb)
  81                 cdev->ll2->cbs->tx_cb(cdev->ll2->cb_cookie, skb,
  82                                       b_last_fragment);
  83
  84         dev_kfree_skb_any(skb);
  85 }
  86
  87 static int qed_ll2_alloc_buffer(struct qed_dev *cdev,
  88                                 u8 **data, dma_addr_t *phys_addr)
  89 {
  90         *data = kmalloc(cdev->ll2->rx_size, GFP_ATOMIC);
  91         if (!(*data)) {
  92                 DP_INFO(cdev, "Failed to allocate LL2 buffer data\n");
  93                 return -ENOMEM;
  94         }
  95
  96         *phys_addr = dma_map_single(&cdev->pdev->dev,
  97                                     ((*data) + NET_SKB_PAD),
  98                                     cdev->ll2->rx_size, DMA_FROM_DEVICE);
  99         if (dma_mapping_error(&cdev->pdev->dev, *phys_addr)) {
 100                 DP_INFO(cdev, "Failed to map LL2 buffer data\n");
 101                 kfree((*data));
 102                 return -ENOMEM;
 103         }
 104
 105         return 0;
 106 }
 107
 108 static int qed_ll2_dealloc_buffer(struct qed_dev *cdev,
 109                                  struct qed_ll2_buffer *buffer)
 110 {
 111         spin_lock_bh(&cdev->ll2->lock);
 112
 113         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
 114                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
 115         kfree(buffer->data);
 116         list_del(&buffer->list);
 117
 118         cdev->ll2->rx_cnt--;
 119         if (!cdev->ll2->rx_cnt)
 120                 DP_INFO(cdev, "All LL2 entries were removed\n");
 121
 122         spin_unlock_bh(&cdev->ll2->lock);
 123
 124         return 0;
 125 }
 126
 127 static void qed_ll2_kill_buffers(struct qed_dev *cdev)
 128 {
 129         struct qed_ll2_buffer *buffer, *tmp_buffer;
 130
 131         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list)
 132                 qed_ll2_dealloc_buffer(cdev, buffer);
 133 }
 134
 135 static void qed_ll2b_complete_rx_packet(void *cxt,
 136                                         struct qed_ll2_comp_rx_data *data)
 137 {
 138         struct qed_hwfn *p_hwfn = cxt;
 139         struct qed_ll2_buffer *buffer = data->cookie;
 140         struct qed_dev *cdev = p_hwfn->cdev;
 141         dma_addr_t new_phys_addr;
 142         struct sk_buff *skb;
 143         bool reuse = false;
 144         int rc = -EINVAL;
 145         u8 *new_data;
 146
 147         DP_VERBOSE(p_hwfn,
 148                    (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA),
 149                    "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",
 150                    (u64)data->rx_buf_addr,
 151                    data->u.placement_offset,
 152                    data->length.packet_length,
 153                    data->parse_flags,
 154                    data->vlan, data->opaque_data_0, data->opaque_data_1);
 155
 156         if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) {
 157                 print_hex_dump(KERN_INFO, "",
 158                                DUMP_PREFIX_OFFSET, 16, 1,
 159                                buffer->data, data->length.packet_length, false);
 160         }
 161
 162         /* Determine if data is valid */
 163         if (data->length.packet_length < ETH_HLEN)
 164                 reuse = true;
 165
 166         /* Allocate a replacement for buffer; Reuse upon failure */
 167         if (!reuse)
 168                 rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data,
 169                                           &new_phys_addr);
 170
 171         /* If need to reuse or there's no replacement buffer, repost this */
 172         if (rc)
 173                 goto out_post;
 174         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
 175                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
 176
 177         skb = build_skb(buffer->data, 0);
 178         if (!skb) {
 179                 DP_INFO(cdev, "Failed to build SKB\n");
 180                 kfree(buffer->data);
 181                 goto out_post1;
 182         }
 183
 184         data->u.placement_offset += NET_SKB_PAD;
 185         skb_reserve(skb, data->u.placement_offset);
 186         skb_put(skb, data->length.packet_length);
 187         skb_checksum_none_assert(skb);
 188
 189         /* Get parital ethernet information instead of eth_type_trans(),
 190          * Since we don't have an associated net_device.
 191          */
 192         skb_reset_mac_header(skb);
 193         skb->protocol = eth_hdr(skb)->h_proto;
 194
 195         /* Pass SKB onward */
 196         if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) {
 197                 if (data->vlan)
 198                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 199                                                data->vlan);
 200                 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb,
 201                                       data->opaque_data_0,
 202                                       data->opaque_data_1);
 203         } else {
 204                 DP_VERBOSE(p_hwfn, (NETIF_MSG_RX_STATUS | NETIF_MSG_PKTDATA |
 205                                     QED_MSG_LL2 | QED_MSG_STORAGE),
 206                            "Dropping the packet\n");
 207                 kfree(buffer->data);
 208         }
 209
 210 out_post1:
 211         /* Update Buffer information and update FW producer */
 212         buffer->data = new_data;
 213         buffer->phys_addr = new_phys_addr;
 214
 215 out_post:
 216         rc = qed_ll2_post_rx_buffer(p_hwfn, cdev->ll2->handle,
 217                                     buffer->phys_addr, 0, buffer, 1);
 218         if (rc)
 219                 qed_ll2_dealloc_buffer(cdev, buffer);
 220 }
 221
 222 static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 223                                                     u8 connection_handle,
 224                                                     bool b_lock,
 225                                                     bool b_only_active)
 226 {
 227         struct qed_ll2_info *p_ll2_conn, *p_ret = NULL;
 228
 229         if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS)
 230                 return NULL;
 231
 232         if (!p_hwfn->p_ll2_info)
 233                 return NULL;
 234
 235         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
 236
 237         if (b_only_active) {
 238                 if (b_lock)
 239                         mutex_lock(&p_ll2_conn->mutex);
 240                 if (p_ll2_conn->b_active)
 241                         p_ret = p_ll2_conn;
 242                 if (b_lock)
 243                         mutex_unlock(&p_ll2_conn->mutex);
 244         } else {
 245                 p_ret = p_ll2_conn;
 246         }
 247
 248         return p_ret;
 249 }
 250
 251 static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 252                                                   u8 connection_handle)
 253 {
 254         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true);
 255 }
 256
 257 static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn,
 258                                                        u8 connection_handle)
 259 {
 260         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true);
 261 }
 262
 263 static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn
 264                                                            *p_hwfn,
 265                                                            u8 connection_handle)
 266 {
 267         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false);
 268 }
 269
 270 static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 271 {
 272         bool b_last_packet = false, b_last_frag = false;
 273         struct qed_ll2_tx_packet *p_pkt = NULL;
 274         struct qed_ll2_info *p_ll2_conn;
 275         struct qed_ll2_tx_queue *p_tx;
 276         unsigned long flags = 0;
 277         dma_addr_t tx_frag;
 278
 279         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 280         if (!p_ll2_conn)
 281                 return;
 282
 283         p_tx = &p_ll2_conn->tx_queue;
 284
 285         spin_lock_irqsave(&p_tx->lock, flags);
 286         while (!list_empty(&p_tx->active_descq)) {
 287                 p_pkt = list_first_entry(&p_tx->active_descq,
 288                                          struct qed_ll2_tx_packet, list_entry);
 289                 if (!p_pkt)
 290                         break;
 291
 292                 list_del(&p_pkt->list_entry);
 293                 b_last_packet = list_empty(&p_tx->active_descq);
 294                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 295                 spin_unlock_irqrestore(&p_tx->lock, flags);
 296                 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
 297                         struct qed_ooo_buffer *p_buffer;
 298
 299                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 300                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 301                                                 p_buffer);
 302                 } else {
 303                         p_tx->cur_completing_packet = *p_pkt;
 304                         p_tx->cur_completing_bd_idx = 1;
 305                         b_last_frag =
 306                                 p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 307                         tx_frag = p_pkt->bds_set[0].tx_frag;
 308                         p_ll2_conn->cbs.tx_release_cb(p_ll2_conn->cbs.cookie,
 309                                                       p_ll2_conn->my_id,
 310                                                       p_pkt->cookie,
 311                                                       tx_frag,
 312                                                       b_last_frag,
 313                                                       b_last_packet);
 314                 }
 315                 spin_lock_irqsave(&p_tx->lock, flags);
 316         }
 317         spin_unlock_irqrestore(&p_tx->lock, flags);
 318 }
 319
 320 static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 321 {
 322         struct qed_ll2_info *p_ll2_conn = p_cookie;
 323         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 324         u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0;
 325         struct qed_ll2_tx_packet *p_pkt;
 326         bool b_last_frag = false;
 327         unsigned long flags;
 328         int rc = -EINVAL;
 329
 330         if (!p_ll2_conn)
 331                 return rc;
 332
 333         spin_lock_irqsave(&p_tx->lock, flags);
 334         if (p_tx->b_completing_packet) {
 335                 rc = -EBUSY;
 336                 goto out;
 337         }
 338
 339         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 340         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 341         while (num_bds) {
 342                 if (list_empty(&p_tx->active_descq))
 343                         goto out;
 344
 345                 p_pkt = list_first_entry(&p_tx->active_descq,
 346                                          struct qed_ll2_tx_packet, list_entry);
 347                 if (!p_pkt)
 348                         goto out;
 349
 350                 p_tx->b_completing_packet = true;
 351                 p_tx->cur_completing_packet = *p_pkt;
 352                 num_bds_in_packet = p_pkt->bd_used;
 353                 list_del(&p_pkt->list_entry);
 354
 355                 if (num_bds < num_bds_in_packet) {
 356                         DP_NOTICE(p_hwfn,
 357                                   "Rest of BDs does not cover whole packet\n");
 358                         goto out;
 359                 }
 360
 361                 num_bds -= num_bds_in_packet;
 362                 p_tx->bds_idx += num_bds_in_packet;
 363                 while (num_bds_in_packet--)
 364                         qed_chain_consume(&p_tx->txq_chain);
 365
 366                 p_tx->cur_completing_bd_idx = 1;
 367                 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 368                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 369
 370                 spin_unlock_irqrestore(&p_tx->lock, flags);
 371
 372                 p_ll2_conn->cbs.tx_comp_cb(p_ll2_conn->cbs.cookie,
 373                                            p_ll2_conn->my_id,
 374                                            p_pkt->cookie,
 375                                            p_pkt->bds_set[0].tx_frag,
 376                                            b_last_frag, !num_bds);
 377
 378                 spin_lock_irqsave(&p_tx->lock, flags);
 379         }
 380
 381         p_tx->b_completing_packet = false;
 382         rc = 0;
 383 out:
 384         spin_unlock_irqrestore(&p_tx->lock, flags);
 385         return rc;
 386 }
 387
 388 static void qed_ll2_rxq_parse_gsi(struct qed_hwfn *p_hwfn,
 389                                   union core_rx_cqe_union *p_cqe,
 390                                   struct qed_ll2_comp_rx_data *data)
 391 {
 392         data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags);
 393         data->length.data_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length);
 394         data->vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan);
 395         data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi);
 396         data->opaque_data_1 = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo);
 397         data->u.data_length_error = p_cqe->rx_cqe_gsi.data_length_error;
 398         data->qp_id = le16_to_cpu(p_cqe->rx_cqe_gsi.qp_id);
 399
 400         data->src_qp = le32_to_cpu(p_cqe->rx_cqe_gsi.src_qp);
 401 }
 402
 403 static void qed_ll2_rxq_parse_reg(struct qed_hwfn *p_hwfn,
 404                                   union core_rx_cqe_union *p_cqe,
 405                                   struct qed_ll2_comp_rx_data *data)
 406 {
 407         data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_fp.parse_flags.flags);
 408         data->err_flags = le16_to_cpu(p_cqe->rx_cqe_fp.err_flags.flags);
 409         data->length.packet_length =
 410             le16_to_cpu(p_cqe->rx_cqe_fp.packet_length);
 411         data->vlan = le16_to_cpu(p_cqe->rx_cqe_fp.vlan);
 412         data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[0]);
 413         data->opaque_data_1 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[1]);
 414         data->u.placement_offset = p_cqe->rx_cqe_fp.placement_offset;
 415 }
 416
 417 static int
 418 qed_ll2_handle_slowpath(struct qed_hwfn *p_hwfn,
 419                         struct qed_ll2_info *p_ll2_conn,
 420                         union core_rx_cqe_union *p_cqe,
 421                         unsigned long *p_lock_flags)
 422 {
 423         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 424         struct core_rx_slow_path_cqe *sp_cqe;
 425
 426         sp_cqe = &p_cqe->rx_cqe_sp;
 427         if (sp_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) {
 428                 DP_NOTICE(p_hwfn,
 429                           "LL2 - unexpected Rx CQE slowpath ramrod_cmd_id:%d\n",
 430                           sp_cqe->ramrod_cmd_id);
 431                 return -EINVAL;
 432         }
 433
 434         if (!p_ll2_conn->cbs.slowpath_cb) {
 435                 DP_NOTICE(p_hwfn,
 436                           "LL2 - received RX_QUEUE_FLUSH but no callback was provided\n");
 437                 return -EINVAL;
 438         }
 439
 440         spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
 441
 442         p_ll2_conn->cbs.slowpath_cb(p_ll2_conn->cbs.cookie,
 443                                     p_ll2_conn->my_id,
 444                                     le32_to_cpu(sp_cqe->opaque_data.data[0]),
 445                                     le32_to_cpu(sp_cqe->opaque_data.data[1]));
 446
 447         spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
 448
 449         return 0;
 450 }
 451
 452 static int
 453 qed_ll2_rxq_handle_completion(struct qed_hwfn *p_hwfn,
 454                               struct qed_ll2_info *p_ll2_conn,
 455                               union core_rx_cqe_union *p_cqe,
 456                               unsigned long *p_lock_flags, bool b_last_cqe)
 457 {
 458         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 459         struct qed_ll2_rx_packet *p_pkt = NULL;
 460         struct qed_ll2_comp_rx_data data;
 461
 462         if (!list_empty(&p_rx->active_descq))
 463                 p_pkt = list_first_entry(&p_rx->active_descq,
 464                                          struct qed_ll2_rx_packet, list_entry);
 465         if (!p_pkt) {
 466                 DP_NOTICE(p_hwfn,
 467                           "[%d] LL2 Rx completion but active_descq is empty\n",
 468                           p_ll2_conn->input.conn_type);
 469
 470                 return -EIO;
 471         }
 472         list_del(&p_pkt->list_entry);
 473
 474         if (p_cqe->rx_cqe_sp.type == CORE_RX_CQE_TYPE_REGULAR)
 475                 qed_ll2_rxq_parse_reg(p_hwfn, p_cqe, &data);
 476         else
 477                 qed_ll2_rxq_parse_gsi(p_hwfn, p_cqe, &data);
 478         if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)
 479                 DP_NOTICE(p_hwfn,
 480                           "Mismatch between active_descq and the LL2 Rx chain\n");
 481
 482         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 483
 484         data.connection_handle = p_ll2_conn->my_id;
 485         data.cookie = p_pkt->cookie;
 486         data.rx_buf_addr = p_pkt->rx_buf_addr;
 487         data.b_last_packet = b_last_cqe;
 488
 489         spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
 490         p_ll2_conn->cbs.rx_comp_cb(p_ll2_conn->cbs.cookie, &data);
 491
 492         spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
 493
 494         return 0;
 495 }
 496
 497 static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie)
 498 {
 499         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)cookie;
 500         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 501         union core_rx_cqe_union *cqe = NULL;
 502         u16 cq_new_idx = 0, cq_old_idx = 0;
 503         unsigned long flags = 0;
 504         int rc = 0;
 505
 506         if (!p_ll2_conn)
 507                 return rc;
 508
 509         spin_lock_irqsave(&p_rx->lock, flags);
 510
 511         if (!QED_LL2_RX_REGISTERED(p_ll2_conn)) {
 512                 spin_unlock_irqrestore(&p_rx->lock, flags);
 513                 return 0;
 514         }
 515
 516         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 517         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 518
 519         while (cq_new_idx != cq_old_idx) {
 520                 bool b_last_cqe = (cq_new_idx == cq_old_idx);
 521
 522                 cqe =
 523                     (union core_rx_cqe_union *)
 524                     qed_chain_consume(&p_rx->rcq_chain);
 525                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 526
 527                 DP_VERBOSE(p_hwfn,
 528                            QED_MSG_LL2,
 529                            "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n",
 530                            cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type);
 531
 532                 switch (cqe->rx_cqe_sp.type) {
 533                 case CORE_RX_CQE_TYPE_SLOW_PATH:
 534                         rc = qed_ll2_handle_slowpath(p_hwfn, p_ll2_conn,
 535                                                      cqe, &flags);
 536                         break;
 537                 case CORE_RX_CQE_TYPE_GSI_OFFLOAD:
 538                 case CORE_RX_CQE_TYPE_REGULAR:
 539                         rc = qed_ll2_rxq_handle_completion(p_hwfn, p_ll2_conn,
 540                                                            cqe, &flags,
 541                                                            b_last_cqe);
 542                         break;
 543                 default:
 544                         rc = -EIO;
 545                 }
 546         }
 547
 548         spin_unlock_irqrestore(&p_rx->lock, flags);
 549         return rc;
 550 }
 551
 552 static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 553 {
 554         struct qed_ll2_info *p_ll2_conn = NULL;
 555         struct qed_ll2_rx_packet *p_pkt = NULL;
 556         struct qed_ll2_rx_queue *p_rx;
 557         unsigned long flags = 0;
 558
 559         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 560         if (!p_ll2_conn)
 561                 return;
 562
 563         p_rx = &p_ll2_conn->rx_queue;
 564
 565         spin_lock_irqsave(&p_rx->lock, flags);
 566         while (!list_empty(&p_rx->active_descq)) {
 567                 p_pkt = list_first_entry(&p_rx->active_descq,
 568                                          struct qed_ll2_rx_packet, list_entry);
 569                 if (!p_pkt)
 570                         break;
 571                 list_move_tail(&p_pkt->list_entry, &p_rx->free_descq);
 572                 spin_unlock_irqrestore(&p_rx->lock, flags);
 573
 574                 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
 575                         struct qed_ooo_buffer *p_buffer;
 576
 577                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 578                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 579                                                 p_buffer);
 580                 } else {
 581                         dma_addr_t rx_buf_addr = p_pkt->rx_buf_addr;
 582                         void *cookie = p_pkt->cookie;
 583                         bool b_last;
 584
 585                         b_last = list_empty(&p_rx->active_descq);
 586                         p_ll2_conn->cbs.rx_release_cb(p_ll2_conn->cbs.cookie,
 587                                                       p_ll2_conn->my_id,
 588                                                       cookie,
 589                                                       rx_buf_addr, b_last);
 590                 }
 591                 spin_lock_irqsave(&p_rx->lock, flags);
 592         }
 593         spin_unlock_irqrestore(&p_rx->lock, flags);
 594 }
 595
 596 static bool
 597 qed_ll2_lb_rxq_handler_slowpath(struct qed_hwfn *p_hwfn,
 598                                 struct core_rx_slow_path_cqe *p_cqe)
 599 {
 600         struct ooo_opaque *iscsi_ooo;
 601         u32 cid;
 602
 603         if (p_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH)
 604                 return false;
 605
 606         iscsi_ooo = (struct ooo_opaque *)&p_cqe->opaque_data;
 607         if (iscsi_ooo->ooo_opcode != TCP_EVENT_DELETE_ISLES)
 608                 return false;
 609
 610         /* Need to make a flush */
 611         cid = le32_to_cpu(iscsi_ooo->cid);
 612         qed_ooo_release_connection_isles(p_hwfn, p_hwfn->p_ooo_info, cid);
 613
 614         return true;
 615 }
 616
 617 static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn,
 618                                   struct qed_ll2_info *p_ll2_conn)
 619 {
 620         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 621         u16 packet_length = 0, parse_flags = 0, vlan = 0;
 622         struct qed_ll2_rx_packet *p_pkt = NULL;
 623         u32 num_ooo_add_to_peninsula = 0, cid;
 624         union core_rx_cqe_union *cqe = NULL;
 625         u16 cq_new_idx = 0, cq_old_idx = 0;
 626         struct qed_ooo_buffer *p_buffer;
 627         struct ooo_opaque *iscsi_ooo;
 628         u8 placement_offset = 0;
 629         u8 cqe_type;
 630
 631         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 632         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 633         if (cq_new_idx == cq_old_idx)
 634                 return 0;
 635
 636         while (cq_new_idx != cq_old_idx) {
 637                 struct core_rx_fast_path_cqe *p_cqe_fp;
 638
 639                 cqe = qed_chain_consume(&p_rx->rcq_chain);
 640                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 641                 cqe_type = cqe->rx_cqe_sp.type;
 642
 643                 if (cqe_type == CORE_RX_CQE_TYPE_SLOW_PATH)
 644                         if (qed_ll2_lb_rxq_handler_slowpath(p_hwfn,
 645                                                             &cqe->rx_cqe_sp))
 646                                 continue;
 647
 648                 if (cqe_type != CORE_RX_CQE_TYPE_REGULAR) {
 649                         DP_NOTICE(p_hwfn,
 650                                   "Got a non-regular LB LL2 completion [type 0x%02x]\n",
 651                                   cqe_type);
 652                         return -EINVAL;
 653                 }
 654                 p_cqe_fp = &cqe->rx_cqe_fp;
 655
 656                 placement_offset = p_cqe_fp->placement_offset;
 657                 parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags);
 658                 packet_length = le16_to_cpu(p_cqe_fp->packet_length);
 659                 vlan = le16_to_cpu(p_cqe_fp->vlan);
 660                 iscsi_ooo = (struct ooo_opaque *)&p_cqe_fp->opaque_data;
 661                 qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info,
 662                                            iscsi_ooo);
 663                 cid = le32_to_cpu(iscsi_ooo->cid);
 664
 665                 /* Process delete isle first */
 666                 if (iscsi_ooo->drop_size)
 667                         qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid,
 668                                              iscsi_ooo->drop_isle,
 669                                              iscsi_ooo->drop_size);
 670
 671                 if (iscsi_ooo->ooo_opcode == TCP_EVENT_NOP)
 672                         continue;
 673
 674                 /* Now process create/add/join isles */
 675                 if (list_empty(&p_rx->active_descq)) {
 676                         DP_NOTICE(p_hwfn,
 677                                   "LL2 OOO RX chain has no submitted buffers\n"
 678                                   );
 679                         return -EIO;
 680                 }
 681
 682                 p_pkt = list_first_entry(&p_rx->active_descq,
 683                                          struct qed_ll2_rx_packet, list_entry);
 684
 685                 if ((iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE) ||
 686                     (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT) ||
 687                     (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT) ||
 688                     (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_PEN) ||
 689                     (iscsi_ooo->ooo_opcode == TCP_EVENT_JOIN)) {
 690                         if (!p_pkt) {
 691                                 DP_NOTICE(p_hwfn,
 692                                           "LL2 OOO RX packet is not valid\n");
 693                                 return -EIO;
 694                         }
 695                         list_del(&p_pkt->list_entry);
 696                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 697                         p_buffer->packet_length = packet_length;
 698                         p_buffer->parse_flags = parse_flags;
 699                         p_buffer->vlan = vlan;
 700                         p_buffer->placement_offset = placement_offset;
 701                         qed_chain_consume(&p_rx->rxq_chain);
 702                         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 703
 704                         switch (iscsi_ooo->ooo_opcode) {
 705                         case TCP_EVENT_ADD_NEW_ISLE:
 706                                 qed_ooo_add_new_isle(p_hwfn,
 707                                                      p_hwfn->p_ooo_info,
 708                                                      cid,
 709                                                      iscsi_ooo->ooo_isle,
 710                                                      p_buffer);
 711                                 break;
 712                         case TCP_EVENT_ADD_ISLE_RIGHT:
 713                                 qed_ooo_add_new_buffer(p_hwfn,
 714                                                        p_hwfn->p_ooo_info,
 715                                                        cid,
 716                                                        iscsi_ooo->ooo_isle,
 717                                                        p_buffer,
 718                                                        QED_OOO_RIGHT_BUF);
 719                                 break;
 720                         case TCP_EVENT_ADD_ISLE_LEFT:
 721                                 qed_ooo_add_new_buffer(p_hwfn,
 722                                                        p_hwfn->p_ooo_info,
 723                                                        cid,
 724                                                        iscsi_ooo->ooo_isle,
 725                                                        p_buffer,
 726                                                        QED_OOO_LEFT_BUF);
 727                                 break;
 728                         case TCP_EVENT_JOIN:
 729                                 qed_ooo_add_new_buffer(p_hwfn,
 730                                                        p_hwfn->p_ooo_info,
 731                                                        cid,
 732                                                        iscsi_ooo->ooo_isle +
 733                                                        1,
 734                                                        p_buffer,
 735                                                        QED_OOO_LEFT_BUF);
 736                                 qed_ooo_join_isles(p_hwfn,
 737                                                    p_hwfn->p_ooo_info,
 738                                                    cid, iscsi_ooo->ooo_isle);
 739                                 break;
 740                         case TCP_EVENT_ADD_PEN:
 741                                 num_ooo_add_to_peninsula++;
 742                                 qed_ooo_put_ready_buffer(p_hwfn,
 743                                                          p_hwfn->p_ooo_info,
 744                                                          p_buffer, true);
 745                                 break;
 746                         }
 747                 } else {
 748                         DP_NOTICE(p_hwfn,
 749                                   "Unexpected event (%d) TX OOO completion\n",
 750                                   iscsi_ooo->ooo_opcode);
 751                 }
 752         }
 753
 754         return 0;
 755 }
 756
 757 static void
 758 qed_ooo_submit_tx_buffers(struct qed_hwfn *p_hwfn,
 759                           struct qed_ll2_info *p_ll2_conn)
 760 {
 761         struct qed_ll2_tx_pkt_info tx_pkt;
 762         struct qed_ooo_buffer *p_buffer;
 763         u16 l4_hdr_offset_w;
 764         dma_addr_t first_frag;
 765         u8 bd_flags;
 766         int rc;
 767
 768         /* Submit Tx buffers here */
 769         while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn,
 770                                                     p_hwfn->p_ooo_info))) {
 771                 l4_hdr_offset_w = 0;
 772                 bd_flags = 0;
 773
 774                 first_frag = p_buffer->rx_buffer_phys_addr +
 775                              p_buffer->placement_offset;
 776                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_FORCE_VLAN_MODE, 1);
 777                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_L4_PROTOCOL, 1);
 778
 779                 memset(&tx_pkt, 0, sizeof(tx_pkt));
 780                 tx_pkt.num_of_bds = 1;
 781                 tx_pkt.vlan = p_buffer->vlan;
 782                 tx_pkt.bd_flags = bd_flags;
 783                 tx_pkt.l4_hdr_offset_w = l4_hdr_offset_w;
 784                 switch (p_ll2_conn->tx_dest) {
 785                 case CORE_TX_DEST_NW:
 786                         tx_pkt.tx_dest = QED_LL2_TX_DEST_NW;
 787                         break;
 788                 case CORE_TX_DEST_LB:
 789                         tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
 790                         break;
 791                 case CORE_TX_DEST_DROP:
 792                 default:
 793                         tx_pkt.tx_dest = QED_LL2_TX_DEST_DROP;
 794                         break;
 795                 }
 796                 tx_pkt.first_frag = first_frag;
 797                 tx_pkt.first_frag_len = p_buffer->packet_length;
 798                 tx_pkt.cookie = p_buffer;
 799
 800                 rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id,
 801                                                &tx_pkt, true);
 802                 if (rc) {
 803                         qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info,
 804                                                  p_buffer, false);
 805                         break;
 806                 }
 807         }
 808 }
 809
 810 static void
 811 qed_ooo_submit_rx_buffers(struct qed_hwfn *p_hwfn,
 812                           struct qed_ll2_info *p_ll2_conn)
 813 {
 814         struct qed_ooo_buffer *p_buffer;
 815         int rc;
 816
 817         while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
 818                                                    p_hwfn->p_ooo_info))) {
 819                 rc = qed_ll2_post_rx_buffer(p_hwfn,
 820                                             p_ll2_conn->my_id,
 821                                             p_buffer->rx_buffer_phys_addr,
 822                                             0, p_buffer, true);
 823                 if (rc) {
 824                         qed_ooo_put_free_buffer(p_hwfn,
 825                                                 p_hwfn->p_ooo_info, p_buffer);
 826                         break;
 827                 }
 828         }
 829 }
 830
 831 static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 832 {
 833         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
 834         int rc;
 835
 836         if (!p_ll2_conn)
 837                 return 0;
 838
 839         if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
 840                 return 0;
 841
 842         rc = qed_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn);
 843         if (rc)
 844                 return rc;
 845
 846         qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
 847         qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
 848
 849         return 0;
 850 }
 851
 852 static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 853 {
 854         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
 855         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 856         struct qed_ll2_tx_packet *p_pkt = NULL;
 857         struct qed_ooo_buffer *p_buffer;
 858         bool b_dont_submit_rx = false;
 859         u16 new_idx = 0, num_bds = 0;
 860         int rc;
 861
 862         if (!p_ll2_conn)
 863                 return 0;
 864
 865         if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
 866                 return 0;
 867
 868         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 869         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 870
 871         if (!num_bds)
 872                 return 0;
 873
 874         while (num_bds) {
 875                 if (list_empty(&p_tx->active_descq))
 876                         return -EINVAL;
 877
 878                 p_pkt = list_first_entry(&p_tx->active_descq,
 879                                          struct qed_ll2_tx_packet, list_entry);
 880                 if (!p_pkt)
 881                         return -EINVAL;
 882
 883                 if (p_pkt->bd_used != 1) {
 884                         DP_NOTICE(p_hwfn,
 885                                   "Unexpectedly many BDs(%d) in TX OOO completion\n",
 886                                   p_pkt->bd_used);
 887                         return -EINVAL;
 888                 }
 889
 890                 list_del(&p_pkt->list_entry);
 891
 892                 num_bds--;
 893                 p_tx->bds_idx++;
 894                 qed_chain_consume(&p_tx->txq_chain);
 895
 896                 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 897                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 898
 899                 if (b_dont_submit_rx) {
 900                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 901                                                 p_buffer);
 902                         continue;
 903                 }
 904
 905                 rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id,
 906                                             p_buffer->rx_buffer_phys_addr, 0,
 907                                             p_buffer, true);
 908                 if (rc != 0) {
 909                         qed_ooo_put_free_buffer(p_hwfn,
 910                                                 p_hwfn->p_ooo_info, p_buffer);
 911                         b_dont_submit_rx = true;
 912                 }
 913         }
 914
 915         qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
 916
 917         return 0;
 918 }
 919
 920 static void qed_ll2_stop_ooo(struct qed_hwfn *p_hwfn)
 921 {
 922         u8 *handle = &p_hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
 923
 924         DP_VERBOSE(p_hwfn, (QED_MSG_STORAGE | QED_MSG_LL2),
 925                    "Stopping LL2 OOO queue [%02x]\n", *handle);
 926
 927         qed_ll2_terminate_connection(p_hwfn, *handle);
 928         qed_ll2_release_connection(p_hwfn, *handle);
 929         *handle = QED_LL2_UNUSED_HANDLE;
 930 }
 931
 932 static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn,
 933                                      struct qed_ll2_info *p_ll2_conn,
 934                                      u8 action_on_error)
 935 {
 936         enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
 937         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 938         struct core_rx_start_ramrod_data *p_ramrod = NULL;
 939         struct qed_spq_entry *p_ent = NULL;
 940         struct qed_sp_init_data init_data;
 941         u16 cqe_pbl_size;
 942         int rc = 0;
 943
 944         /* Get SPQ entry */
 945         memset(&init_data, 0, sizeof(init_data));
 946         init_data.cid = p_ll2_conn->cid;
 947         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 948         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 949
 950         rc = qed_sp_init_request(p_hwfn, &p_ent,
 951                                  CORE_RAMROD_RX_QUEUE_START,
 952                                  PROTOCOLID_CORE, &init_data);
 953         if (rc)
 954                 return rc;
 955
 956         p_ramrod = &p_ent->ramrod.core_rx_queue_start;
 957         memset(p_ramrod, 0, sizeof(*p_ramrod));
 958         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
 959         p_ramrod->sb_index = p_rx->rx_sb_index;
 960         p_ramrod->complete_event_flg = 1;
 961
 962         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
 963         DMA_REGPAIR_LE(p_ramrod->bd_base, p_rx->rxq_chain.p_phys_addr);
 964         cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain);
 965         p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size);
 966         DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr,
 967                        qed_chain_get_pbl_phys(&p_rx->rcq_chain));
 968
 969         p_ramrod->drop_ttl0_flg = p_ll2_conn->input.rx_drop_ttl0_flg;
 970         p_ramrod->inner_vlan_stripping_en =
 971                 p_ll2_conn->input.rx_vlan_removal_en;
 972
 973         if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
 974             p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE)
 975                 p_ramrod->report_outer_vlan = 1;
 976         p_ramrod->queue_id = p_ll2_conn->queue_id;
 977         p_ramrod->main_func_queue = p_ll2_conn->main_func_queue ? 1 : 0;
 978
 979         if (test_bit(QED_MF_LL2_NON_UNICAST, &p_hwfn->cdev->mf_bits) &&
 980             p_ramrod->main_func_queue && conn_type != QED_LL2_TYPE_ROCE &&
 981             conn_type != QED_LL2_TYPE_IWARP &&
 982                 (!QED_IS_NVMETCP_PERSONALITY(p_hwfn))) {
 983                 p_ramrod->mf_si_bcast_accept_all = 1;
 984                 p_ramrod->mf_si_mcast_accept_all = 1;
 985         } else {
 986                 p_ramrod->mf_si_bcast_accept_all = 0;
 987                 p_ramrod->mf_si_mcast_accept_all = 0;
 988         }
 989
 990         p_ramrod->action_on_error.error_type = action_on_error;
 991         p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
 992         p_ramrod->zero_prod_flg = 1;
 993
 994         return qed_spq_post(p_hwfn, p_ent, NULL);
 995 }
 996
 997 static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
 998                                      struct qed_ll2_info *p_ll2_conn)
 999 {
1000         enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
1001         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1002         struct core_tx_start_ramrod_data *p_ramrod = NULL;
1003         struct qed_spq_entry *p_ent = NULL;
1004         struct qed_sp_init_data init_data;
1005         u16 pq_id = 0, pbl_size;
1006         int rc = -EINVAL;
1007
1008         if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
1009                 return 0;
1010
1011         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
1012                 p_ll2_conn->tx_stats_en = 0;
1013         else
1014                 p_ll2_conn->tx_stats_en = 1;
1015
1016         /* Get SPQ entry */
1017         memset(&init_data, 0, sizeof(init_data));
1018         init_data.cid = p_ll2_conn->cid;
1019         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1020         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1021
1022         rc = qed_sp_init_request(p_hwfn, &p_ent,
1023                                  CORE_RAMROD_TX_QUEUE_START,
1024                                  PROTOCOLID_CORE, &init_data);
1025         if (rc)
1026                 return rc;
1027
1028         p_ramrod = &p_ent->ramrod.core_tx_queue_start;
1029
1030         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
1031         p_ramrod->sb_index = p_tx->tx_sb_index;
1032         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
1033         p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
1034         p_ramrod->stats_id = p_ll2_conn->tx_stats_id;
1035
1036         DMA_REGPAIR_LE(p_ramrod->pbl_base_addr,
1037                        qed_chain_get_pbl_phys(&p_tx->txq_chain));
1038         pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain);
1039         p_ramrod->pbl_size = cpu_to_le16(pbl_size);
1040
1041         switch (p_ll2_conn->input.tx_tc) {
1042         case PURE_LB_TC:
1043                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
1044                 break;
1045         case PKT_LB_TC:
1046                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO);
1047                 break;
1048         default:
1049                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
1050                 break;
1051         }
1052
1053         p_ramrod->qm_pq_id = cpu_to_le16(pq_id);
1054
1055         switch (conn_type) {
1056         case QED_LL2_TYPE_FCOE:
1057                 p_ramrod->conn_type = PROTOCOLID_FCOE;
1058                 break;
1059         case QED_LL2_TYPE_TCP_ULP:
1060                 p_ramrod->conn_type = PROTOCOLID_TCP_ULP;
1061                 break;
1062         case QED_LL2_TYPE_ROCE:
1063                 p_ramrod->conn_type = PROTOCOLID_ROCE;
1064                 break;
1065         case QED_LL2_TYPE_IWARP:
1066                 p_ramrod->conn_type = PROTOCOLID_IWARP;
1067                 break;
1068         case QED_LL2_TYPE_OOO:
1069                 if (p_hwfn->hw_info.personality == QED_PCI_ISCSI ||
1070                     p_hwfn->hw_info.personality == QED_PCI_NVMETCP)
1071                         p_ramrod->conn_type = PROTOCOLID_TCP_ULP;
1072                 else
1073                         p_ramrod->conn_type = PROTOCOLID_IWARP;
1074                 break;
1075         default:
1076                 p_ramrod->conn_type = PROTOCOLID_ETH;
1077                 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type);
1078         }
1079
1080         p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1081
1082         rc = qed_spq_post(p_hwfn, p_ent, NULL);
1083         if (rc)
1084                 return rc;
1085
1086         rc = qed_db_recovery_add(p_hwfn->cdev, p_tx->doorbell_addr,
1087                                  &p_tx->db_msg, DB_REC_WIDTH_32B,
1088                                  DB_REC_KERNEL);
1089         return rc;
1090 }
1091
1092 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn,
1093                                     struct qed_ll2_info *p_ll2_conn)
1094 {
1095         struct core_rx_stop_ramrod_data *p_ramrod = NULL;
1096         struct qed_spq_entry *p_ent = NULL;
1097         struct qed_sp_init_data init_data;
1098         int rc = -EINVAL;
1099
1100         /* Get SPQ entry */
1101         memset(&init_data, 0, sizeof(init_data));
1102         init_data.cid = p_ll2_conn->cid;
1103         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1104         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1105
1106         rc = qed_sp_init_request(p_hwfn, &p_ent,
1107                                  CORE_RAMROD_RX_QUEUE_STOP,
1108                                  PROTOCOLID_CORE, &init_data);
1109         if (rc)
1110                 return rc;
1111
1112         p_ramrod = &p_ent->ramrod.core_rx_queue_stop;
1113
1114         p_ramrod->complete_event_flg = 1;
1115         p_ramrod->queue_id = p_ll2_conn->queue_id;
1116
1117         return qed_spq_post(p_hwfn, p_ent, NULL);
1118 }
1119
1120 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn,
1121                                     struct qed_ll2_info *p_ll2_conn)
1122 {
1123         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1124         struct qed_spq_entry *p_ent = NULL;
1125         struct qed_sp_init_data init_data;
1126         int rc = -EINVAL;
1127         qed_db_recovery_del(p_hwfn->cdev, p_tx->doorbell_addr, &p_tx->db_msg);
1128
1129         /* Get SPQ entry */
1130         memset(&init_data, 0, sizeof(init_data));
1131         init_data.cid = p_ll2_conn->cid;
1132         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1133         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1134
1135         rc = qed_sp_init_request(p_hwfn, &p_ent,
1136                                  CORE_RAMROD_TX_QUEUE_STOP,
1137                                  PROTOCOLID_CORE, &init_data);
1138         if (rc)
1139                 return rc;
1140
1141         return qed_spq_post(p_hwfn, p_ent, NULL);
1142 }
1143
1144 static int
1145 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
1146                               struct qed_ll2_info *p_ll2_info)
1147 {
1148         struct qed_chain_init_params params = {
1149                 .intended_use   = QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1150                 .cnt_type       = QED_CHAIN_CNT_TYPE_U16,
1151                 .num_elems      = p_ll2_info->input.rx_num_desc,
1152         };
1153         struct qed_dev *cdev = p_hwfn->cdev;
1154         struct qed_ll2_rx_packet *p_descq;
1155         u32 capacity;
1156         int rc = 0;
1157
1158         if (!p_ll2_info->input.rx_num_desc)
1159                 goto out;
1160
1161         params.mode = QED_CHAIN_MODE_NEXT_PTR;
1162         params.elem_size = sizeof(struct core_rx_bd);
1163
1164         rc = qed_chain_alloc(cdev, &p_ll2_info->rx_queue.rxq_chain, &params);
1165         if (rc) {
1166                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
1167                 goto out;
1168         }
1169
1170         capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
1171         p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet),
1172                           GFP_KERNEL);
1173         if (!p_descq) {
1174                 rc = -ENOMEM;
1175                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n");
1176                 goto out;
1177         }
1178         p_ll2_info->rx_queue.descq_array = p_descq;
1179
1180         params.mode = QED_CHAIN_MODE_PBL;
1181         params.elem_size = sizeof(struct core_rx_fast_path_cqe);
1182
1183         rc = qed_chain_alloc(cdev, &p_ll2_info->rx_queue.rcq_chain, &params);
1184         if (rc) {
1185                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
1186                 goto out;
1187         }
1188
1189         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1190                    "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
1191                    p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc);
1192
1193 out:
1194         return rc;
1195 }
1196
1197 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
1198                                          struct qed_ll2_info *p_ll2_info)
1199 {
1200         struct qed_chain_init_params params = {
1201                 .mode           = QED_CHAIN_MODE_PBL,
1202                 .intended_use   = QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1203                 .cnt_type       = QED_CHAIN_CNT_TYPE_U16,
1204                 .num_elems      = p_ll2_info->input.tx_num_desc,
1205                 .elem_size      = sizeof(struct core_tx_bd),
1206         };
1207         struct qed_ll2_tx_packet *p_descq;
1208         size_t desc_size;
1209         u32 capacity;
1210         int rc = 0;
1211
1212         if (!p_ll2_info->input.tx_num_desc)
1213                 goto out;
1214
1215         rc = qed_chain_alloc(p_hwfn->cdev, &p_ll2_info->tx_queue.txq_chain,
1216                              &params);
1217         if (rc)
1218                 goto out;
1219
1220         capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
1221         /* All bds_set elements are flexibily added. */
1222         desc_size = struct_size(p_descq, bds_set,
1223                                 p_ll2_info->input.tx_max_bds_per_packet);
1224
1225         p_descq = kcalloc(capacity, desc_size, GFP_KERNEL);
1226         if (!p_descq) {
1227                 rc = -ENOMEM;
1228                 goto out;
1229         }
1230         p_ll2_info->tx_queue.descq_mem = p_descq;
1231
1232         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1233                    "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
1234                    p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc);
1235
1236 out:
1237         if (rc)
1238                 DP_NOTICE(p_hwfn,
1239                           "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
1240                           p_ll2_info->input.tx_num_desc);
1241         return rc;
1242 }
1243
1244 static int
1245 qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn,
1246                                struct qed_ll2_info *p_ll2_info, u16 mtu)
1247 {
1248         struct qed_ooo_buffer *p_buf = NULL;
1249         void *p_virt;
1250         u16 buf_idx;
1251         int rc = 0;
1252
1253         if (p_ll2_info->input.conn_type != QED_LL2_TYPE_OOO)
1254                 return rc;
1255
1256         /* Correct number of requested OOO buffers if needed */
1257         if (!p_ll2_info->input.rx_num_ooo_buffers) {
1258                 u16 num_desc = p_ll2_info->input.rx_num_desc;
1259
1260                 if (!num_desc)
1261                         return -EINVAL;
1262                 p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2;
1263         }
1264
1265         for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers;
1266              buf_idx++) {
1267                 p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL);
1268                 if (!p_buf) {
1269                         rc = -ENOMEM;
1270                         goto out;
1271                 }
1272
1273                 p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE;
1274                 p_buf->rx_buffer_size = (p_buf->rx_buffer_size +
1275                                          ETH_CACHE_LINE_SIZE - 1) &
1276                                         ~(ETH_CACHE_LINE_SIZE - 1);
1277                 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
1278                                             p_buf->rx_buffer_size,
1279                                             &p_buf->rx_buffer_phys_addr,
1280                                             GFP_KERNEL);
1281                 if (!p_virt) {
1282                         kfree(p_buf);
1283                         rc = -ENOMEM;
1284                         goto out;
1285                 }
1286
1287                 p_buf->rx_buffer_virt_addr = p_virt;
1288                 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf);
1289         }
1290
1291         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1292                    "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n",
1293                    p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size);
1294
1295 out:
1296         return rc;
1297 }
1298
1299 static int
1300 qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs)
1301 {
1302         if (!cbs || (!cbs->rx_comp_cb ||
1303                      !cbs->rx_release_cb ||
1304                      !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie))
1305                 return -EINVAL;
1306
1307         p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb;
1308         p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb;
1309         p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb;
1310         p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb;
1311         p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb;
1312         p_ll2_info->cbs.cookie = cbs->cookie;
1313
1314         return 0;
1315 }
1316
1317 static void _qed_ll2_calc_allowed_conns(struct qed_hwfn *p_hwfn,
1318                                         struct qed_ll2_acquire_data *data,
1319                                         u8 *start_idx, u8 *last_idx)
1320 {
1321         /* LL2 queues handles will be split as follows:
1322          * First will be the legacy queues, and then the ctx based.
1323          */
1324         if (data->input.rx_conn_type == QED_LL2_RX_TYPE_LEGACY) {
1325                 *start_idx = QED_LL2_LEGACY_CONN_BASE_PF;
1326                 *last_idx = *start_idx +
1327                         QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF;
1328         } else {
1329                 /* QED_LL2_RX_TYPE_CTX */
1330                 *start_idx = QED_LL2_CTX_CONN_BASE_PF;
1331                 *last_idx = *start_idx +
1332                         QED_MAX_NUM_OF_CTX_LL2_CONNS_PF;
1333         }
1334 }
1335
1336 static enum core_error_handle
1337 qed_ll2_get_error_choice(enum qed_ll2_error_handle err)
1338 {
1339         switch (err) {
1340         case QED_LL2_DROP_PACKET:
1341                 return LL2_DROP_PACKET;
1342         case QED_LL2_DO_NOTHING:
1343                 return LL2_DO_NOTHING;
1344         case QED_LL2_ASSERT:
1345                 return LL2_ASSERT;
1346         default:
1347                 return LL2_DO_NOTHING;
1348         }
1349 }
1350
1351 int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data)
1352 {
1353         struct qed_hwfn *p_hwfn = cxt;
1354         qed_int_comp_cb_t comp_rx_cb, comp_tx_cb;
1355         struct qed_ll2_info *p_ll2_info = NULL;
1356         u8 i, first_idx, last_idx, *p_tx_max;
1357         int rc;
1358
1359         if (!data->p_connection_handle || !p_hwfn->p_ll2_info)
1360                 return -EINVAL;
1361
1362         _qed_ll2_calc_allowed_conns(p_hwfn, data, &first_idx, &last_idx);
1363
1364         /* Find a free connection to be used */
1365         for (i = first_idx; i < last_idx; i++) {
1366                 mutex_lock(&p_hwfn->p_ll2_info[i].mutex);
1367                 if (p_hwfn->p_ll2_info[i].b_active) {
1368                         mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1369                         continue;
1370                 }
1371
1372                 p_hwfn->p_ll2_info[i].b_active = true;
1373                 p_ll2_info = &p_hwfn->p_ll2_info[i];
1374                 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1375                 break;
1376         }
1377         if (!p_ll2_info)
1378                 return -EBUSY;
1379
1380         memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input));
1381
1382         switch (data->input.tx_dest) {
1383         case QED_LL2_TX_DEST_NW:
1384                 p_ll2_info->tx_dest = CORE_TX_DEST_NW;
1385                 break;
1386         case QED_LL2_TX_DEST_LB:
1387                 p_ll2_info->tx_dest = CORE_TX_DEST_LB;
1388                 break;
1389         case QED_LL2_TX_DEST_DROP:
1390                 p_ll2_info->tx_dest = CORE_TX_DEST_DROP;
1391                 break;
1392         default:
1393                 return -EINVAL;
1394         }
1395
1396         if (data->input.conn_type == QED_LL2_TYPE_OOO ||
1397             data->input.secondary_queue)
1398                 p_ll2_info->main_func_queue = false;
1399         else
1400                 p_ll2_info->main_func_queue = true;
1401
1402         /* Correct maximum number of Tx BDs */
1403         p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet;
1404         if (*p_tx_max == 0)
1405                 *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET;
1406         else
1407                 *p_tx_max = min_t(u8, *p_tx_max,
1408                                   CORE_LL2_TX_MAX_BDS_PER_PACKET);
1409
1410         rc = qed_ll2_set_cbs(p_ll2_info, data->cbs);
1411         if (rc) {
1412                 DP_NOTICE(p_hwfn, "Invalid callback functions\n");
1413                 goto q_allocate_fail;
1414         }
1415
1416         rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info);
1417         if (rc)
1418                 goto q_allocate_fail;
1419
1420         rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info);
1421         if (rc)
1422                 goto q_allocate_fail;
1423
1424         rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info,
1425                                             data->input.mtu);
1426         if (rc)
1427                 goto q_allocate_fail;
1428
1429         /* Register callbacks for the Rx/Tx queues */
1430         if (data->input.conn_type == QED_LL2_TYPE_OOO) {
1431                 comp_rx_cb = qed_ll2_lb_rxq_completion;
1432                 comp_tx_cb = qed_ll2_lb_txq_completion;
1433         } else {
1434                 comp_rx_cb = qed_ll2_rxq_completion;
1435                 comp_tx_cb = qed_ll2_txq_completion;
1436         }
1437
1438         if (data->input.rx_num_desc) {
1439                 qed_int_register_cb(p_hwfn, comp_rx_cb,
1440                                     &p_hwfn->p_ll2_info[i],
1441                                     &p_ll2_info->rx_queue.rx_sb_index,
1442                                     &p_ll2_info->rx_queue.p_fw_cons);
1443                 p_ll2_info->rx_queue.b_cb_registered = true;
1444         }
1445
1446         if (data->input.tx_num_desc) {
1447                 qed_int_register_cb(p_hwfn,
1448                                     comp_tx_cb,
1449                                     &p_hwfn->p_ll2_info[i],
1450                                     &p_ll2_info->tx_queue.tx_sb_index,
1451                                     &p_ll2_info->tx_queue.p_fw_cons);
1452                 p_ll2_info->tx_queue.b_cb_registered = true;
1453         }
1454
1455         *data->p_connection_handle = i;
1456         return rc;
1457
1458 q_allocate_fail:
1459         qed_ll2_release_connection(p_hwfn, i);
1460         return -ENOMEM;
1461 }
1462
1463 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn,
1464                                            struct qed_ll2_info *p_ll2_conn)
1465 {
1466         enum qed_ll2_error_handle error_input;
1467         enum core_error_handle error_mode;
1468         u8 action_on_error = 0;
1469         int rc;
1470
1471         if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
1472                 return 0;
1473
1474         DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0);
1475         error_input = p_ll2_conn->input.ai_err_packet_too_big;
1476         error_mode = qed_ll2_get_error_choice(error_input);
1477         SET_FIELD(action_on_error,
1478                   CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode);
1479         error_input = p_ll2_conn->input.ai_err_no_buf;
1480         error_mode = qed_ll2_get_error_choice(error_input);
1481         SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode);
1482
1483         rc = qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
1484         if (rc)
1485                 return rc;
1486
1487         if (p_ll2_conn->rx_queue.ctx_based) {
1488                 rc = qed_db_recovery_add(p_hwfn->cdev,
1489                                          p_ll2_conn->rx_queue.set_prod_addr,
1490                                          &p_ll2_conn->rx_queue.db_data,
1491                                          DB_REC_WIDTH_64B, DB_REC_KERNEL);
1492         }
1493
1494         return rc;
1495 }
1496
1497 static void
1498 qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn,
1499                                  struct qed_ll2_info *p_ll2_conn)
1500 {
1501         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
1502                 return;
1503
1504         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1505         qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
1506 }
1507
1508 static inline u8 qed_ll2_handle_to_queue_id(struct qed_hwfn *p_hwfn,
1509                                             u8 handle,
1510                                             u8 ll2_queue_type)
1511 {
1512         u8 qid;
1513
1514         if (ll2_queue_type == QED_LL2_RX_TYPE_LEGACY)
1515                 return p_hwfn->hw_info.resc_start[QED_LL2_RAM_QUEUE] + handle;
1516
1517         /* QED_LL2_RX_TYPE_CTX
1518          * FW distinguishes between the legacy queues (ram based) and the
1519          * ctx based queues by the queue_id.
1520          * The first MAX_NUM_LL2_RX_RAM_QUEUES queues are legacy
1521          * and the queue ids above that are ctx base.
1522          */
1523         qid = p_hwfn->hw_info.resc_start[QED_LL2_CTX_QUEUE] +
1524               MAX_NUM_LL2_RX_RAM_QUEUES;
1525
1526         /* See comment on the acquire connection for how the ll2
1527          * queues handles are divided.
1528          */
1529         qid += (handle - QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF);
1530
1531         return qid;
1532 }
1533
1534 int qed_ll2_establish_connection(void *cxt, u8 connection_handle)
1535 {
1536         struct e4_core_conn_context *p_cxt;
1537         struct qed_ll2_tx_packet *p_pkt;
1538         struct qed_ll2_info *p_ll2_conn;
1539         struct qed_hwfn *p_hwfn = cxt;
1540         struct qed_ll2_rx_queue *p_rx;
1541         struct qed_ll2_tx_queue *p_tx;
1542         struct qed_cxt_info cxt_info;
1543         struct qed_ptt *p_ptt;
1544         int rc = -EINVAL;
1545         u32 i, capacity;
1546         size_t desc_size;
1547         u8 qid;
1548
1549         p_ptt = qed_ptt_acquire(p_hwfn);
1550         if (!p_ptt)
1551                 return -EAGAIN;
1552
1553         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1554         if (!p_ll2_conn) {
1555                 rc = -EINVAL;
1556                 goto out;
1557         }
1558
1559         p_rx = &p_ll2_conn->rx_queue;
1560         p_tx = &p_ll2_conn->tx_queue;
1561
1562         qed_chain_reset(&p_rx->rxq_chain);
1563         qed_chain_reset(&p_rx->rcq_chain);
1564         INIT_LIST_HEAD(&p_rx->active_descq);
1565         INIT_LIST_HEAD(&p_rx->free_descq);
1566         INIT_LIST_HEAD(&p_rx->posting_descq);
1567         spin_lock_init(&p_rx->lock);
1568         capacity = qed_chain_get_capacity(&p_rx->rxq_chain);
1569         for (i = 0; i < capacity; i++)
1570                 list_add_tail(&p_rx->descq_array[i].list_entry,
1571                               &p_rx->free_descq);
1572         *p_rx->p_fw_cons = 0;
1573
1574         qed_chain_reset(&p_tx->txq_chain);
1575         INIT_LIST_HEAD(&p_tx->active_descq);
1576         INIT_LIST_HEAD(&p_tx->free_descq);
1577         INIT_LIST_HEAD(&p_tx->sending_descq);
1578         spin_lock_init(&p_tx->lock);
1579         capacity = qed_chain_get_capacity(&p_tx->txq_chain);
1580         /* All bds_set elements are flexibily added. */
1581         desc_size = struct_size(p_pkt, bds_set,
1582                                 p_ll2_conn->input.tx_max_bds_per_packet);
1583
1584         for (i = 0; i < capacity; i++) {
1585                 p_pkt = p_tx->descq_mem + desc_size * i;
1586                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
1587         }
1588         p_tx->cur_completing_bd_idx = 0;
1589         p_tx->bds_idx = 0;
1590         p_tx->b_completing_packet = false;
1591         p_tx->cur_send_packet = NULL;
1592         p_tx->cur_send_frag_num = 0;
1593         p_tx->cur_completing_frag_num = 0;
1594         *p_tx->p_fw_cons = 0;
1595
1596         rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
1597         if (rc)
1598                 goto out;
1599         cxt_info.iid = p_ll2_conn->cid;
1600         rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info);
1601         if (rc) {
1602                 DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n",
1603                           p_ll2_conn->cid);
1604                 goto out;
1605         }
1606
1607         p_cxt = cxt_info.p_cxt;
1608
1609         memset(p_cxt, 0, sizeof(*p_cxt));
1610
1611         qid = qed_ll2_handle_to_queue_id(p_hwfn, connection_handle,
1612                                          p_ll2_conn->input.rx_conn_type);
1613         p_ll2_conn->queue_id = qid;
1614         p_ll2_conn->tx_stats_id = qid;
1615
1616         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1617                    "Establishing ll2 queue. PF %d ctx_based=%d abs qid=%d\n",
1618                    p_hwfn->rel_pf_id, p_ll2_conn->input.rx_conn_type, qid);
1619
1620         if (p_ll2_conn->input.rx_conn_type == QED_LL2_RX_TYPE_LEGACY) {
1621                 p_rx->set_prod_addr = p_hwfn->regview +
1622                     GTT_BAR0_MAP_REG_TSDM_RAM + TSTORM_LL2_RX_PRODS_OFFSET(qid);
1623         } else {
1624                 /* QED_LL2_RX_TYPE_CTX - using doorbell */
1625                 p_rx->ctx_based = 1;
1626
1627                 p_rx->set_prod_addr = p_hwfn->doorbells +
1628                         p_hwfn->dpi_start_offset +
1629                         DB_ADDR_SHIFT(DQ_PWM_OFFSET_TCM_LL2_PROD_UPDATE);
1630
1631                 /* prepare db data */
1632                 p_rx->db_data.icid = cpu_to_le16((u16)p_ll2_conn->cid);
1633                 SET_FIELD(p_rx->db_data.params,
1634                           CORE_PWM_PROD_UPDATE_DATA_AGG_CMD, DB_AGG_CMD_SET);
1635                 SET_FIELD(p_rx->db_data.params,
1636                           CORE_PWM_PROD_UPDATE_DATA_RESERVED1, 0);
1637         }
1638
1639         p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells +
1640                                             qed_db_addr(p_ll2_conn->cid,
1641                                                         DQ_DEMS_LEGACY);
1642         /* prepare db data */
1643         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
1644         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
1645         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
1646                   DQ_XCM_CORE_TX_BD_PROD_CMD);
1647         p_tx->db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
1648
1649         rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
1650         if (rc)
1651                 goto out;
1652
1653         rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
1654         if (rc)
1655                 goto out;
1656
1657         if (!QED_IS_RDMA_PERSONALITY(p_hwfn) &&
1658             !QED_IS_NVMETCP_PERSONALITY(p_hwfn))
1659                 qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1);
1660
1661         qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn);
1662
1663         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1664                 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
1665                         qed_llh_add_protocol_filter(p_hwfn->cdev, 0,
1666                                                     QED_LLH_FILTER_ETHERTYPE,
1667                                                     ETH_P_FCOE, 0);
1668                 qed_llh_add_protocol_filter(p_hwfn->cdev, 0,
1669                                             QED_LLH_FILTER_ETHERTYPE,
1670                                             ETH_P_FIP, 0);
1671         }
1672
1673 out:
1674         qed_ptt_release(p_hwfn, p_ptt);
1675         return rc;
1676 }
1677
1678 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn,
1679                                              struct qed_ll2_rx_queue *p_rx,
1680                                              struct qed_ll2_rx_packet *p_curp)
1681 {
1682         struct qed_ll2_rx_packet *p_posting_packet = NULL;
1683         struct core_ll2_rx_prod rx_prod = { 0, 0 };
1684         bool b_notify_fw = false;
1685         u16 bd_prod, cq_prod;
1686
1687         /* This handles the flushing of already posted buffers */
1688         while (!list_empty(&p_rx->posting_descq)) {
1689                 p_posting_packet = list_first_entry(&p_rx->posting_descq,
1690                                                     struct qed_ll2_rx_packet,
1691                                                     list_entry);
1692                 list_move_tail(&p_posting_packet->list_entry,
1693                                &p_rx->active_descq);
1694                 b_notify_fw = true;
1695         }
1696
1697         /* This handles the supplied packet [if there is one] */
1698         if (p_curp) {
1699                 list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
1700                 b_notify_fw = true;
1701         }
1702
1703         if (!b_notify_fw)
1704                 return;
1705
1706         bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
1707         cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
1708         if (p_rx->ctx_based) {
1709                 /* update producer by giving a doorbell */
1710                 p_rx->db_data.prod.bd_prod = cpu_to_le16(bd_prod);
1711                 p_rx->db_data.prod.cqe_prod = cpu_to_le16(cq_prod);
1712                 /* Make sure chain element is updated before ringing the
1713                  * doorbell
1714                  */
1715                 dma_wmb();
1716                 DIRECT_REG_WR64(p_rx->set_prod_addr,
1717                                 *((u64 *)&p_rx->db_data));
1718         } else {
1719                 rx_prod.bd_prod = cpu_to_le16(bd_prod);
1720                 rx_prod.cqe_prod = cpu_to_le16(cq_prod);
1721
1722                 /* Make sure chain element is updated before ringing the
1723                  * doorbell
1724                  */
1725                 dma_wmb();
1726
1727                 DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
1728         }
1729 }
1730
1731 int qed_ll2_post_rx_buffer(void *cxt,
1732                            u8 connection_handle,
1733                            dma_addr_t addr,
1734                            u16 buf_len, void *cookie, u8 notify_fw)
1735 {
1736         struct qed_hwfn *p_hwfn = cxt;
1737         struct core_rx_bd_with_buff_len *p_curb = NULL;
1738         struct qed_ll2_rx_packet *p_curp = NULL;
1739         struct qed_ll2_info *p_ll2_conn;
1740         struct qed_ll2_rx_queue *p_rx;
1741         unsigned long flags;
1742         void *p_data;
1743         int rc = 0;
1744
1745         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1746         if (!p_ll2_conn)
1747                 return -EINVAL;
1748         p_rx = &p_ll2_conn->rx_queue;
1749         if (!p_rx->set_prod_addr)
1750                 return -EIO;
1751
1752         spin_lock_irqsave(&p_rx->lock, flags);
1753         if (!list_empty(&p_rx->free_descq))
1754                 p_curp = list_first_entry(&p_rx->free_descq,
1755                                           struct qed_ll2_rx_packet, list_entry);
1756         if (p_curp) {
1757                 if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
1758                     qed_chain_get_elem_left(&p_rx->rcq_chain)) {
1759                         p_data = qed_chain_produce(&p_rx->rxq_chain);
1760                         p_curb = (struct core_rx_bd_with_buff_len *)p_data;
1761                         qed_chain_produce(&p_rx->rcq_chain);
1762                 }
1763         }
1764
1765         /* If we're lacking entires, let's try to flush buffers to FW */
1766         if (!p_curp || !p_curb) {
1767                 rc = -EBUSY;
1768                 p_curp = NULL;
1769                 goto out_notify;
1770         }
1771
1772         /* We have an Rx packet we can fill */
1773         DMA_REGPAIR_LE(p_curb->addr, addr);
1774         p_curb->buff_length = cpu_to_le16(buf_len);
1775         p_curp->rx_buf_addr = addr;
1776         p_curp->cookie = cookie;
1777         p_curp->rxq_bd = p_curb;
1778         p_curp->buf_length = buf_len;
1779         list_del(&p_curp->list_entry);
1780
1781         /* Check if we only want to enqueue this packet without informing FW */
1782         if (!notify_fw) {
1783                 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
1784                 goto out;
1785         }
1786
1787 out_notify:
1788         qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
1789 out:
1790         spin_unlock_irqrestore(&p_rx->lock, flags);
1791         return rc;
1792 }
1793
1794 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
1795                                           struct qed_ll2_tx_queue *p_tx,
1796                                           struct qed_ll2_tx_packet *p_curp,
1797                                           struct qed_ll2_tx_pkt_info *pkt,
1798                                           u8 notify_fw)
1799 {
1800         list_del(&p_curp->list_entry);
1801         p_curp->cookie = pkt->cookie;
1802         p_curp->bd_used = pkt->num_of_bds;
1803         p_curp->notify_fw = notify_fw;
1804         p_tx->cur_send_packet = p_curp;
1805         p_tx->cur_send_frag_num = 0;
1806
1807         p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag;
1808         p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len;
1809         p_tx->cur_send_frag_num++;
1810 }
1811
1812 static void
1813 qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
1814                                  struct qed_ll2_info *p_ll2,
1815                                  struct qed_ll2_tx_packet *p_curp,
1816                                  struct qed_ll2_tx_pkt_info *pkt)
1817 {
1818         struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
1819         u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
1820         struct core_tx_bd *start_bd = NULL;
1821         enum core_roce_flavor_type roce_flavor;
1822         enum core_tx_dest tx_dest;
1823         u16 bd_data = 0, frag_idx;
1824         u16 bitfield1;
1825
1826         roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE
1827                                                              : CORE_RROCE;
1828
1829         switch (pkt->tx_dest) {
1830         case QED_LL2_TX_DEST_NW:
1831                 tx_dest = CORE_TX_DEST_NW;
1832                 break;
1833         case QED_LL2_TX_DEST_LB:
1834                 tx_dest = CORE_TX_DEST_LB;
1835                 break;
1836         case QED_LL2_TX_DEST_DROP:
1837                 tx_dest = CORE_TX_DEST_DROP;
1838                 break;
1839         default:
1840                 tx_dest = CORE_TX_DEST_LB;
1841                 break;
1842         }
1843
1844         start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1845         if (QED_IS_IWARP_PERSONALITY(p_hwfn) &&
1846             p_ll2->input.conn_type == QED_LL2_TYPE_OOO) {
1847                 start_bd->nw_vlan_or_lb_echo =
1848                     cpu_to_le16(IWARP_LL2_IN_ORDER_TX_QUEUE);
1849         } else {
1850                 start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan);
1851                 if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
1852                     p_ll2->input.conn_type == QED_LL2_TYPE_FCOE)
1853                         pkt->remove_stag = true;
1854         }
1855
1856         bitfield1 = le16_to_cpu(start_bd->bitfield1);
1857         SET_FIELD(bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W, pkt->l4_hdr_offset_w);
1858         SET_FIELD(bitfield1, CORE_TX_BD_TX_DST, tx_dest);
1859         start_bd->bitfield1 = cpu_to_le16(bitfield1);
1860
1861         bd_data |= pkt->bd_flags;
1862         SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1);
1863         SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds);
1864         SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor);
1865         SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_CSUM, !!(pkt->enable_ip_cksum));
1866         SET_FIELD(bd_data, CORE_TX_BD_DATA_L4_CSUM, !!(pkt->enable_l4_cksum));
1867         SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_LEN, !!(pkt->calc_ip_len));
1868         SET_FIELD(bd_data, CORE_TX_BD_DATA_DISABLE_STAG_INSERTION,
1869                   !!(pkt->remove_stag));
1870
1871         start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data);
1872         DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag);
1873         start_bd->nbytes = cpu_to_le16(pkt->first_frag_len);
1874
1875         DP_VERBOSE(p_hwfn,
1876                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1877                    "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Tx Producer at [0x%04x] - set with a %04x bytes %02x BDs buffer at %08x:%08x\n",
1878                    p_ll2->queue_id,
1879                    p_ll2->cid,
1880                    p_ll2->input.conn_type,
1881                    prod_idx,
1882                    pkt->first_frag_len,
1883                    pkt->num_of_bds,
1884                    le32_to_cpu(start_bd->addr.hi),
1885                    le32_to_cpu(start_bd->addr.lo));
1886
1887         if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds)
1888                 return;
1889
1890         /* Need to provide the packet with additional BDs for frags */
1891         for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
1892              frag_idx < pkt->num_of_bds; frag_idx++) {
1893                 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
1894
1895                 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1896                 (*p_bd)->bd_data.as_bitfield = 0;
1897                 (*p_bd)->bitfield1 = 0;
1898                 p_curp->bds_set[frag_idx].tx_frag = 0;
1899                 p_curp->bds_set[frag_idx].frag_len = 0;
1900         }
1901 }
1902
1903 /* This should be called while the Txq spinlock is being held */
1904 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
1905                                      struct qed_ll2_info *p_ll2_conn)
1906 {
1907         bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
1908         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1909         struct qed_ll2_tx_packet *p_pkt = NULL;
1910         u16 bd_prod;
1911
1912         /* If there are missing BDs, don't do anything now */
1913         if (p_ll2_conn->tx_queue.cur_send_frag_num !=
1914             p_ll2_conn->tx_queue.cur_send_packet->bd_used)
1915                 return;
1916
1917         /* Push the current packet to the list and clean after it */
1918         list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
1919                       &p_ll2_conn->tx_queue.sending_descq);
1920         p_ll2_conn->tx_queue.cur_send_packet = NULL;
1921         p_ll2_conn->tx_queue.cur_send_frag_num = 0;
1922
1923         /* Notify FW of packet only if requested to */
1924         if (!b_notify)
1925                 return;
1926
1927         bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
1928
1929         while (!list_empty(&p_tx->sending_descq)) {
1930                 p_pkt = list_first_entry(&p_tx->sending_descq,
1931                                          struct qed_ll2_tx_packet, list_entry);
1932                 if (!p_pkt)
1933                         break;
1934
1935                 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq);
1936         }
1937
1938         p_tx->db_msg.spq_prod = cpu_to_le16(bd_prod);
1939
1940         /* Make sure the BDs data is updated before ringing the doorbell */
1941         wmb();
1942
1943         DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&p_tx->db_msg));
1944
1945         DP_VERBOSE(p_hwfn,
1946                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1947                    "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
1948                    p_ll2_conn->queue_id,
1949                    p_ll2_conn->cid,
1950                    p_ll2_conn->input.conn_type, p_tx->db_msg.spq_prod);
1951 }
1952
1953 int qed_ll2_prepare_tx_packet(void *cxt,
1954                               u8 connection_handle,
1955                               struct qed_ll2_tx_pkt_info *pkt,
1956                               bool notify_fw)
1957 {
1958         struct qed_hwfn *p_hwfn = cxt;
1959         struct qed_ll2_tx_packet *p_curp = NULL;
1960         struct qed_ll2_info *p_ll2_conn = NULL;
1961         struct qed_ll2_tx_queue *p_tx;
1962         struct qed_chain *p_tx_chain;
1963         unsigned long flags;
1964         int rc = 0;
1965
1966         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1967         if (!p_ll2_conn)
1968                 return -EINVAL;
1969         p_tx = &p_ll2_conn->tx_queue;
1970         p_tx_chain = &p_tx->txq_chain;
1971
1972         if (pkt->num_of_bds > p_ll2_conn->input.tx_max_bds_per_packet)
1973                 return -EIO;
1974
1975         spin_lock_irqsave(&p_tx->lock, flags);
1976         if (p_tx->cur_send_packet) {
1977                 rc = -EEXIST;
1978                 goto out;
1979         }
1980
1981         /* Get entry, but only if we have tx elements for it */
1982         if (!list_empty(&p_tx->free_descq))
1983                 p_curp = list_first_entry(&p_tx->free_descq,
1984                                           struct qed_ll2_tx_packet, list_entry);
1985         if (p_curp && qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds)
1986                 p_curp = NULL;
1987
1988         if (!p_curp) {
1989                 rc = -EBUSY;
1990                 goto out;
1991         }
1992
1993         /* Prepare packet and BD, and perhaps send a doorbell to FW */
1994         qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw);
1995
1996         qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt);
1997
1998         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1999
2000 out:
2001         spin_unlock_irqrestore(&p_tx->lock, flags);
2002         return rc;
2003 }
2004
2005 int qed_ll2_set_fragment_of_tx_packet(void *cxt,
2006                                       u8 connection_handle,
2007                                       dma_addr_t addr, u16 nbytes)
2008 {
2009         struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
2010         struct qed_hwfn *p_hwfn = cxt;
2011         struct qed_ll2_info *p_ll2_conn = NULL;
2012         u16 cur_send_frag_num = 0;
2013         struct core_tx_bd *p_bd;
2014         unsigned long flags;
2015
2016         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2017         if (!p_ll2_conn)
2018                 return -EINVAL;
2019
2020         if (!p_ll2_conn->tx_queue.cur_send_packet)
2021                 return -EINVAL;
2022
2023         p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
2024         cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
2025
2026         if (cur_send_frag_num >= p_cur_send_packet->bd_used)
2027                 return -EINVAL;
2028
2029         /* Fill the BD information, and possibly notify FW */
2030         p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
2031         DMA_REGPAIR_LE(p_bd->addr, addr);
2032         p_bd->nbytes = cpu_to_le16(nbytes);
2033         p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
2034         p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
2035
2036         p_ll2_conn->tx_queue.cur_send_frag_num++;
2037
2038         spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
2039         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
2040         spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
2041
2042         return 0;
2043 }
2044
2045 int qed_ll2_terminate_connection(void *cxt, u8 connection_handle)
2046 {
2047         struct qed_hwfn *p_hwfn = cxt;
2048         struct qed_ll2_info *p_ll2_conn = NULL;
2049         int rc = -EINVAL;
2050         struct qed_ptt *p_ptt;
2051
2052         p_ptt = qed_ptt_acquire(p_hwfn);
2053         if (!p_ptt)
2054                 return -EAGAIN;
2055
2056         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
2057         if (!p_ll2_conn) {
2058                 rc = -EINVAL;
2059                 goto out;
2060         }
2061
2062         /* Stop Tx & Rx of connection, if needed */
2063         if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
2064                 p_ll2_conn->tx_queue.b_cb_registered = false;
2065                 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
2066                 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
2067                 if (rc)
2068                         goto out;
2069
2070                 qed_ll2_txq_flush(p_hwfn, connection_handle);
2071                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
2072         }
2073
2074         if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
2075                 p_ll2_conn->rx_queue.b_cb_registered = false;
2076                 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
2077
2078                 if (p_ll2_conn->rx_queue.ctx_based)
2079                         qed_db_recovery_del(p_hwfn->cdev,
2080                                             p_ll2_conn->rx_queue.set_prod_addr,
2081                                             &p_ll2_conn->rx_queue.db_data);
2082
2083                 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
2084                 if (rc)
2085                         goto out;
2086
2087                 qed_ll2_rxq_flush(p_hwfn, connection_handle);
2088                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
2089         }
2090
2091         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
2092                 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
2093
2094         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
2095                 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
2096                         qed_llh_remove_protocol_filter(p_hwfn->cdev, 0,
2097                                                        QED_LLH_FILTER_ETHERTYPE,
2098                                                        ETH_P_FCOE, 0);
2099                 qed_llh_remove_protocol_filter(p_hwfn->cdev, 0,
2100                                                QED_LLH_FILTER_ETHERTYPE,
2101                                                ETH_P_FIP, 0);
2102         }
2103
2104 out:
2105         qed_ptt_release(p_hwfn, p_ptt);
2106         return rc;
2107 }
2108
2109 static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn,
2110                                            struct qed_ll2_info *p_ll2_conn)
2111 {
2112         struct qed_ooo_buffer *p_buffer;
2113
2114         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
2115                 return;
2116
2117         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
2118         while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
2119                                                    p_hwfn->p_ooo_info))) {
2120                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
2121                                   p_buffer->rx_buffer_size,
2122                                   p_buffer->rx_buffer_virt_addr,
2123                                   p_buffer->rx_buffer_phys_addr);
2124                 kfree(p_buffer);
2125         }
2126 }
2127
2128 void qed_ll2_release_connection(void *cxt, u8 connection_handle)
2129 {
2130         struct qed_hwfn *p_hwfn = cxt;
2131         struct qed_ll2_info *p_ll2_conn = NULL;
2132
2133         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2134         if (!p_ll2_conn)
2135                 return;
2136
2137         kfree(p_ll2_conn->tx_queue.descq_mem);
2138         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
2139
2140         kfree(p_ll2_conn->rx_queue.descq_array);
2141         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
2142         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
2143
2144         qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
2145
2146         qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn);
2147
2148         mutex_lock(&p_ll2_conn->mutex);
2149         p_ll2_conn->b_active = false;
2150         mutex_unlock(&p_ll2_conn->mutex);
2151 }
2152
2153 int qed_ll2_alloc(struct qed_hwfn *p_hwfn)
2154 {
2155         struct qed_ll2_info *p_ll2_connections;
2156         u8 i;
2157
2158         /* Allocate LL2's set struct */
2159         p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
2160                                     sizeof(struct qed_ll2_info), GFP_KERNEL);
2161         if (!p_ll2_connections) {
2162                 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
2163                 return -ENOMEM;
2164         }
2165
2166         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2167                 p_ll2_connections[i].my_id = i;
2168
2169         p_hwfn->p_ll2_info = p_ll2_connections;
2170         return 0;
2171 }
2172
2173 void qed_ll2_setup(struct qed_hwfn *p_hwfn)
2174 {
2175         int i;
2176
2177         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2178                 mutex_init(&p_hwfn->p_ll2_info[i].mutex);
2179 }
2180
2181 void qed_ll2_free(struct qed_hwfn *p_hwfn)
2182 {
2183         if (!p_hwfn->p_ll2_info)
2184                 return;
2185
2186         kfree(p_hwfn->p_ll2_info);
2187         p_hwfn->p_ll2_info = NULL;
2188 }
2189
2190 static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn,
2191                                     struct qed_ptt *p_ptt,
2192                                     struct qed_ll2_stats *p_stats)
2193 {
2194         struct core_ll2_port_stats port_stats;
2195
2196         memset(&port_stats, 0, sizeof(port_stats));
2197         qed_memcpy_from(p_hwfn, p_ptt, &port_stats,
2198                         BAR0_MAP_REG_TSDM_RAM +
2199                         TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)),
2200                         sizeof(port_stats));
2201
2202         p_stats->gsi_invalid_hdr += HILO_64_REGPAIR(port_stats.gsi_invalid_hdr);
2203         p_stats->gsi_invalid_pkt_length +=
2204             HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length);
2205         p_stats->gsi_unsupported_pkt_typ +=
2206             HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ);
2207         p_stats->gsi_crcchksm_error +=
2208             HILO_64_REGPAIR(port_stats.gsi_crcchksm_error);
2209 }
2210
2211 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,
2212                                 struct qed_ptt *p_ptt,
2213                                 struct qed_ll2_info *p_ll2_conn,
2214                                 struct qed_ll2_stats *p_stats)
2215 {
2216         struct core_ll2_tstorm_per_queue_stat tstats;
2217         u8 qid = p_ll2_conn->queue_id;
2218         u32 tstats_addr;
2219
2220         memset(&tstats, 0, sizeof(tstats));
2221         tstats_addr = BAR0_MAP_REG_TSDM_RAM +
2222                       CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
2223         qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
2224
2225         p_stats->packet_too_big_discard +=
2226                         HILO_64_REGPAIR(tstats.packet_too_big_discard);
2227         p_stats->no_buff_discard += HILO_64_REGPAIR(tstats.no_buff_discard);
2228 }
2229
2230 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
2231                                 struct qed_ptt *p_ptt,
2232                                 struct qed_ll2_info *p_ll2_conn,
2233                                 struct qed_ll2_stats *p_stats)
2234 {
2235         struct core_ll2_ustorm_per_queue_stat ustats;
2236         u8 qid = p_ll2_conn->queue_id;
2237         u32 ustats_addr;
2238
2239         memset(&ustats, 0, sizeof(ustats));
2240         ustats_addr = BAR0_MAP_REG_USDM_RAM +
2241                       CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
2242         qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
2243
2244         p_stats->rcv_ucast_bytes += HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
2245         p_stats->rcv_mcast_bytes += HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
2246         p_stats->rcv_bcast_bytes += HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
2247         p_stats->rcv_ucast_pkts += HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
2248         p_stats->rcv_mcast_pkts += HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
2249         p_stats->rcv_bcast_pkts += HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
2250 }
2251
2252 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
2253                                 struct qed_ptt *p_ptt,
2254                                 struct qed_ll2_info *p_ll2_conn,
2255                                 struct qed_ll2_stats *p_stats)
2256 {
2257         struct core_ll2_pstorm_per_queue_stat pstats;
2258         u8 stats_id = p_ll2_conn->tx_stats_id;
2259         u32 pstats_addr;
2260
2261         memset(&pstats, 0, sizeof(pstats));
2262         pstats_addr = BAR0_MAP_REG_PSDM_RAM +
2263                       CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
2264         qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
2265
2266         p_stats->sent_ucast_bytes += HILO_64_REGPAIR(pstats.sent_ucast_bytes);
2267         p_stats->sent_mcast_bytes += HILO_64_REGPAIR(pstats.sent_mcast_bytes);
2268         p_stats->sent_bcast_bytes += HILO_64_REGPAIR(pstats.sent_bcast_bytes);
2269         p_stats->sent_ucast_pkts += HILO_64_REGPAIR(pstats.sent_ucast_pkts);
2270         p_stats->sent_mcast_pkts += HILO_64_REGPAIR(pstats.sent_mcast_pkts);
2271         p_stats->sent_bcast_pkts += HILO_64_REGPAIR(pstats.sent_bcast_pkts);
2272 }
2273
2274 static int __qed_ll2_get_stats(void *cxt, u8 connection_handle,
2275                                struct qed_ll2_stats *p_stats)
2276 {
2277         struct qed_hwfn *p_hwfn = cxt;
2278         struct qed_ll2_info *p_ll2_conn = NULL;
2279         struct qed_ptt *p_ptt;
2280
2281         if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
2282             !p_hwfn->p_ll2_info)
2283                 return -EINVAL;
2284
2285         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
2286
2287         p_ptt = qed_ptt_acquire(p_hwfn);
2288         if (!p_ptt) {
2289                 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
2290                 return -EINVAL;
2291         }
2292
2293         if (p_ll2_conn->input.gsi_enable)
2294                 _qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats);
2295
2296         _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2297
2298         _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2299
2300         if (p_ll2_conn->tx_stats_en)
2301                 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2302
2303         qed_ptt_release(p_hwfn, p_ptt);
2304
2305         return 0;
2306 }
2307
2308 int qed_ll2_get_stats(void *cxt,
2309                       u8 connection_handle, struct qed_ll2_stats *p_stats)
2310 {
2311         memset(p_stats, 0, sizeof(*p_stats));
2312         return __qed_ll2_get_stats(cxt, connection_handle, p_stats);
2313 }
2314
2315 static void qed_ll2b_release_rx_packet(void *cxt,
2316                                        u8 connection_handle,
2317                                        void *cookie,
2318                                        dma_addr_t rx_buf_addr,
2319                                        bool b_last_packet)
2320 {
2321         struct qed_hwfn *p_hwfn = cxt;
2322
2323         qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie);
2324 }
2325
2326 static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
2327                                     const struct qed_ll2_cb_ops *ops,
2328                                     void *cookie)
2329 {
2330         cdev->ll2->cbs = ops;
2331         cdev->ll2->cb_cookie = cookie;
2332 }
2333
2334 static struct qed_ll2_cbs ll2_cbs = {
2335         .rx_comp_cb = &qed_ll2b_complete_rx_packet,
2336         .rx_release_cb = &qed_ll2b_release_rx_packet,
2337         .tx_comp_cb = &qed_ll2b_complete_tx_packet,
2338         .tx_release_cb = &qed_ll2b_complete_tx_packet,
2339 };
2340
2341 static void qed_ll2_set_conn_data(struct qed_hwfn *p_hwfn,
2342                                   struct qed_ll2_acquire_data *data,
2343                                   struct qed_ll2_params *params,
2344                                   enum qed_ll2_conn_type conn_type,
2345                                   u8 *handle, bool lb)
2346 {
2347         memset(data, 0, sizeof(*data));
2348
2349         data->input.conn_type = conn_type;
2350         data->input.mtu = params->mtu;
2351         data->input.rx_num_desc = QED_LL2_RX_SIZE;
2352         data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets;
2353         data->input.rx_vlan_removal_en = params->rx_vlan_stripping;
2354         data->input.tx_num_desc = QED_LL2_TX_SIZE;
2355         data->p_connection_handle = handle;
2356         data->cbs = &ll2_cbs;
2357         ll2_cbs.cookie = p_hwfn;
2358
2359         if (lb) {
2360                 data->input.tx_tc = PKT_LB_TC;
2361                 data->input.tx_dest = QED_LL2_TX_DEST_LB;
2362         } else {
2363                 data->input.tx_tc = 0;
2364                 data->input.tx_dest = QED_LL2_TX_DEST_NW;
2365         }
2366 }
2367
2368 static int qed_ll2_start_ooo(struct qed_hwfn *p_hwfn,
2369                              struct qed_ll2_params *params)
2370 {
2371         u8 *handle = &p_hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
2372         struct qed_ll2_acquire_data data;
2373         int rc;
2374
2375         qed_ll2_set_conn_data(p_hwfn, &data, params,
2376                               QED_LL2_TYPE_OOO, handle, true);
2377
2378         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2379         if (rc) {
2380                 DP_INFO(p_hwfn, "Failed to acquire LL2 OOO connection\n");
2381                 goto out;
2382         }
2383
2384         rc = qed_ll2_establish_connection(p_hwfn, *handle);
2385         if (rc) {
2386                 DP_INFO(p_hwfn, "Failed to establish LL2 OOO connection\n");
2387                 goto fail;
2388         }
2389
2390         return 0;
2391
2392 fail:
2393         qed_ll2_release_connection(p_hwfn, *handle);
2394 out:
2395         *handle = QED_LL2_UNUSED_HANDLE;
2396         return rc;
2397 }
2398
2399 static bool qed_ll2_is_storage_eng1(struct qed_dev *cdev)
2400 {
2401         return (QED_IS_FCOE_PERSONALITY(QED_LEADING_HWFN(cdev)) ||
2402                 QED_IS_ISCSI_PERSONALITY(QED_LEADING_HWFN(cdev)) ||
2403                 QED_IS_NVMETCP_PERSONALITY(QED_LEADING_HWFN(cdev))) &&
2404                 (QED_AFFIN_HWFN(cdev) != QED_LEADING_HWFN(cdev));
2405 }
2406
2407 static int __qed_ll2_stop(struct qed_hwfn *p_hwfn)
2408 {
2409         struct qed_dev *cdev = p_hwfn->cdev;
2410         int rc;
2411
2412         rc = qed_ll2_terminate_connection(p_hwfn, cdev->ll2->handle);
2413         if (rc)
2414                 DP_INFO(cdev, "Failed to terminate LL2 connection\n");
2415
2416         qed_ll2_release_connection(p_hwfn, cdev->ll2->handle);
2417
2418         return rc;
2419 }
2420
2421 static int qed_ll2_stop(struct qed_dev *cdev)
2422 {
2423         bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2424         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2425         int rc = 0, rc2 = 0;
2426
2427         if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
2428                 return 0;
2429         if (!QED_IS_NVMETCP_PERSONALITY(p_hwfn))
2430                 qed_llh_remove_mac_filter(cdev, 0, cdev->ll2_mac_address);
2431
2432         qed_llh_remove_mac_filter(cdev, 0, cdev->ll2_mac_address);
2433         eth_zero_addr(cdev->ll2_mac_address);
2434
2435         if (QED_IS_ISCSI_PERSONALITY(p_hwfn) || QED_IS_NVMETCP_PERSONALITY(p_hwfn))
2436                 qed_ll2_stop_ooo(p_hwfn);
2437
2438         /* In CMT mode, LL2 is always started on engine 0 for a storage PF */
2439         if (b_is_storage_eng1) {
2440                 rc2 = __qed_ll2_stop(QED_LEADING_HWFN(cdev));
2441                 if (rc2)
2442                         DP_NOTICE(QED_LEADING_HWFN(cdev),
2443                                   "Failed to stop LL2 on engine 0\n");
2444         }
2445
2446         rc = __qed_ll2_stop(p_hwfn);
2447         if (rc)
2448                 DP_NOTICE(p_hwfn, "Failed to stop LL2\n");
2449
2450         qed_ll2_kill_buffers(cdev);
2451
2452         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2453
2454         return rc | rc2;
2455 }
2456
2457 static int __qed_ll2_start(struct qed_hwfn *p_hwfn,
2458                            struct qed_ll2_params *params)
2459 {
2460         struct qed_ll2_buffer *buffer, *tmp_buffer;
2461         struct qed_dev *cdev = p_hwfn->cdev;
2462         enum qed_ll2_conn_type conn_type;
2463         struct qed_ll2_acquire_data data;
2464         int rc, rx_cnt;
2465
2466         switch (p_hwfn->hw_info.personality) {
2467         case QED_PCI_FCOE:
2468                 conn_type = QED_LL2_TYPE_FCOE;
2469                 break;
2470         case QED_PCI_ISCSI:
2471         case QED_PCI_NVMETCP:
2472                 conn_type = QED_LL2_TYPE_TCP_ULP;
2473                 break;
2474         case QED_PCI_ETH_ROCE:
2475                 conn_type = QED_LL2_TYPE_ROCE;
2476                 break;
2477         default:
2478
2479                 conn_type = QED_LL2_TYPE_TEST;
2480         }
2481
2482         qed_ll2_set_conn_data(p_hwfn, &data, params, conn_type,
2483                               &cdev->ll2->handle, false);
2484
2485         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2486         if (rc) {
2487                 DP_INFO(p_hwfn, "Failed to acquire LL2 connection\n");
2488                 return rc;
2489         }
2490
2491         rc = qed_ll2_establish_connection(p_hwfn, cdev->ll2->handle);
2492         if (rc) {
2493                 DP_INFO(p_hwfn, "Failed to establish LL2 connection\n");
2494                 goto release_conn;
2495         }
2496
2497         /* Post all Rx buffers to FW */
2498         spin_lock_bh(&cdev->ll2->lock);
2499         rx_cnt = cdev->ll2->rx_cnt;
2500         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) {
2501                 rc = qed_ll2_post_rx_buffer(p_hwfn,
2502                                             cdev->ll2->handle,
2503                                             buffer->phys_addr, 0, buffer, 1);
2504                 if (rc) {
2505                         DP_INFO(p_hwfn,
2506                                 "Failed to post an Rx buffer; Deleting it\n");
2507                         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
2508                                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
2509                         kfree(buffer->data);
2510                         list_del(&buffer->list);
2511                         kfree(buffer);
2512                 } else {
2513                         rx_cnt++;
2514                 }
2515         }
2516         spin_unlock_bh(&cdev->ll2->lock);
2517
2518         if (rx_cnt == cdev->ll2->rx_cnt) {
2519                 DP_NOTICE(p_hwfn, "Failed passing even a single Rx buffer\n");
2520                 goto terminate_conn;
2521         }
2522         cdev->ll2->rx_cnt = rx_cnt;
2523
2524         return 0;
2525
2526 terminate_conn:
2527         qed_ll2_terminate_connection(p_hwfn, cdev->ll2->handle);
2528 release_conn:
2529         qed_ll2_release_connection(p_hwfn, cdev->ll2->handle);
2530         return rc;
2531 }
2532
2533 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
2534 {
2535         bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2536         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2537         struct qed_ll2_buffer *buffer;
2538         int rx_num_desc, i, rc;
2539
2540         if (!is_valid_ether_addr(params->ll2_mac_address)) {
2541                 DP_NOTICE(cdev, "Invalid Ethernet address\n");
2542                 return -EINVAL;
2543         }
2544
2545         WARN_ON(!cdev->ll2->cbs);
2546
2547         /* Initialize LL2 locks & lists */
2548         INIT_LIST_HEAD(&cdev->ll2->list);
2549         spin_lock_init(&cdev->ll2->lock);
2550
2551         cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
2552                              L1_CACHE_BYTES + params->mtu;
2553
2554         /* Allocate memory for LL2.
2555          * In CMT mode, in case of a storage PF which is affintized to engine 1,
2556          * LL2 is started also on engine 0 and thus we need twofold buffers.
2557          */
2558         rx_num_desc = QED_LL2_RX_SIZE * (b_is_storage_eng1 ? 2 : 1);
2559         DP_INFO(cdev, "Allocating %d LL2 buffers of size %08x bytes\n",
2560                 rx_num_desc, cdev->ll2->rx_size);
2561         for (i = 0; i < rx_num_desc; i++) {
2562                 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2563                 if (!buffer) {
2564                         DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
2565                         rc = -ENOMEM;
2566                         goto err0;
2567                 }
2568
2569                 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
2570                                           &buffer->phys_addr);
2571                 if (rc) {
2572                         kfree(buffer);
2573                         goto err0;
2574                 }
2575
2576                 list_add_tail(&buffer->list, &cdev->ll2->list);
2577         }
2578
2579         rc = __qed_ll2_start(p_hwfn, params);
2580         if (rc) {
2581                 DP_NOTICE(cdev, "Failed to start LL2\n");
2582                 goto err0;
2583         }
2584
2585         /* In CMT mode, always need to start LL2 on engine 0 for a storage PF,
2586          * since broadcast/mutlicast packets are routed to engine 0.
2587          */
2588         if (b_is_storage_eng1) {
2589                 rc = __qed_ll2_start(QED_LEADING_HWFN(cdev), params);
2590                 if (rc) {
2591                         DP_NOTICE(QED_LEADING_HWFN(cdev),
2592                                   "Failed to start LL2 on engine 0\n");
2593                         goto err1;
2594                 }
2595         }
2596
2597         if (QED_IS_ISCSI_PERSONALITY(p_hwfn) || QED_IS_NVMETCP_PERSONALITY(p_hwfn)) {
2598                 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n");
2599                 rc = qed_ll2_start_ooo(p_hwfn, params);
2600                 if (rc) {
2601                         DP_NOTICE(cdev, "Failed to start OOO LL2\n");
2602                         goto err2;
2603                 }
2604         }
2605
2606         if (!QED_IS_NVMETCP_PERSONALITY(p_hwfn)) {
2607                 rc = qed_llh_add_mac_filter(cdev, 0, params->ll2_mac_address);
2608                 if (rc) {
2609                         DP_NOTICE(cdev, "Failed to add an LLH filter\n");
2610                         goto err3;
2611                 }
2612
2613         }
2614
2615         ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
2616
2617         return 0;
2618
2619 err3:
2620         if (QED_IS_ISCSI_PERSONALITY(p_hwfn) || QED_IS_NVMETCP_PERSONALITY(p_hwfn))
2621                 qed_ll2_stop_ooo(p_hwfn);
2622 err2:
2623         if (b_is_storage_eng1)
2624                 __qed_ll2_stop(QED_LEADING_HWFN(cdev));
2625 err1:
2626         __qed_ll2_stop(p_hwfn);
2627 err0:
2628         qed_ll2_kill_buffers(cdev);
2629         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2630         return rc;
2631 }
2632
2633 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb,
2634                               unsigned long xmit_flags)
2635 {
2636         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2637         struct qed_ll2_tx_pkt_info pkt;
2638         const skb_frag_t *frag;
2639         u8 flags = 0, nr_frags;
2640         int rc = -EINVAL, i;
2641         dma_addr_t mapping;
2642         u16 vlan = 0;
2643
2644         if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
2645                 DP_INFO(cdev, "Cannot transmit a checksummed packet\n");
2646                 return -EINVAL;
2647         }
2648
2649         /* Cache number of fragments from SKB since SKB may be freed by
2650          * the completion routine after calling qed_ll2_prepare_tx_packet()
2651          */
2652         nr_frags = skb_shinfo(skb)->nr_frags;
2653
2654         if (1 + nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) {
2655                 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
2656                        1 + nr_frags);
2657                 return -EINVAL;
2658         }
2659
2660         mapping = dma_map_single(&cdev->pdev->dev, skb->data,
2661                                  skb->len, DMA_TO_DEVICE);
2662         if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2663                 DP_NOTICE(cdev, "SKB mapping failed\n");
2664                 return -EINVAL;
2665         }
2666
2667         /* Request HW to calculate IP csum */
2668         if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
2669               ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
2670                 flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT);
2671
2672         if (skb_vlan_tag_present(skb)) {
2673                 vlan = skb_vlan_tag_get(skb);
2674                 flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT);
2675         }
2676
2677         memset(&pkt, 0, sizeof(pkt));
2678         pkt.num_of_bds = 1 + nr_frags;
2679         pkt.vlan = vlan;
2680         pkt.bd_flags = flags;
2681         pkt.tx_dest = QED_LL2_TX_DEST_NW;
2682         pkt.first_frag = mapping;
2683         pkt.first_frag_len = skb->len;
2684         pkt.cookie = skb;
2685         if (test_bit(QED_MF_UFP_SPECIFIC, &cdev->mf_bits) &&
2686             test_bit(QED_LL2_XMIT_FLAGS_FIP_DISCOVERY, &xmit_flags))
2687                 pkt.remove_stag = true;
2688
2689         /* qed_ll2_prepare_tx_packet() may actually send the packet if
2690          * there are no fragments in the skb and subsequently the completion
2691          * routine may run and free the SKB, so no dereferencing the SKB
2692          * beyond this point unless skb has any fragments.
2693          */
2694         rc = qed_ll2_prepare_tx_packet(p_hwfn, cdev->ll2->handle,
2695                                        &pkt, 1);
2696         if (rc)
2697                 goto err;
2698
2699         for (i = 0; i < nr_frags; i++) {
2700                 frag = &skb_shinfo(skb)->frags[i];
2701
2702                 mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0,
2703                                            skb_frag_size(frag), DMA_TO_DEVICE);
2704
2705                 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2706                         DP_NOTICE(cdev,
2707                                   "Unable to map frag - dropping packet\n");
2708                         rc = -ENOMEM;
2709                         goto err;
2710                 }
2711
2712                 rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn,
2713                                                        cdev->ll2->handle,
2714                                                        mapping,
2715                                                        skb_frag_size(frag));
2716
2717                 /* if failed not much to do here, partial packet has been posted
2718                  * we can't free memory, will need to wait for completion
2719                  */
2720                 if (rc)
2721                         goto err2;
2722         }
2723
2724         return 0;
2725
2726 err:
2727         dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE);
2728 err2:
2729         return rc;
2730 }
2731
2732 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats)
2733 {
2734         bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2735         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2736         int rc;
2737
2738         if (!cdev->ll2)
2739                 return -EINVAL;
2740
2741         rc = qed_ll2_get_stats(p_hwfn, cdev->ll2->handle, stats);
2742         if (rc) {
2743                 DP_NOTICE(p_hwfn, "Failed to get LL2 stats\n");
2744                 return rc;
2745         }
2746
2747         /* In CMT mode, LL2 is always started on engine 0 for a storage PF */
2748         if (b_is_storage_eng1) {
2749                 rc = __qed_ll2_get_stats(QED_LEADING_HWFN(cdev),
2750                                          cdev->ll2->handle, stats);
2751                 if (rc) {
2752                         DP_NOTICE(QED_LEADING_HWFN(cdev),
2753                                   "Failed to get LL2 stats on engine 0\n");
2754                         return rc;
2755                 }
2756         }
2757
2758         return 0;
2759 }
2760
2761 const struct qed_ll2_ops qed_ll2_ops_pass = {
2762         .start = &qed_ll2_start,
2763         .stop = &qed_ll2_stop,
2764         .start_xmit = &qed_ll2_start_xmit,
2765         .register_cb_ops = &qed_ll2_register_cb_ops,
2766         .get_stats = &qed_ll2_stats,
2767 };
2768
2769 int qed_ll2_alloc_if(struct qed_dev *cdev)
2770 {
2771         cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL);
2772         return cdev->ll2 ? 0 : -ENOMEM;
2773 }
2774
2775 void qed_ll2_dealloc_if(struct qed_dev *cdev)
2776 {
2777         kfree(cdev->ll2);
2778         cdev->ll2 = NULL;
2779 }