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

   1 /* QLogic qed NIC Driver
   2  *
   3  * Copyright (c) 2015 QLogic Corporation
   4  *
   5  * This software is available under the terms of the GNU General Public License
   6  * (GPL) Version 2, available from the file COPYING in the main directory of
   7  * this source tree.
   8  */
   9
  10 #include <linux/types.h>
  11 #include <asm/byteorder.h>
  12 #include <linux/dma-mapping.h>
  13 #include <linux/if_vlan.h>
  14 #include <linux/kernel.h>
  15 #include <linux/pci.h>
  16 #include <linux/slab.h>
  17 #include <linux/stddef.h>
  18 #include <linux/version.h>
  19 #include <linux/workqueue.h>
  20 #include <net/ipv6.h>
  21 #include <linux/bitops.h>
  22 #include <linux/delay.h>
  23 #include <linux/errno.h>
  24 #include <linux/etherdevice.h>
  25 #include <linux/io.h>
  26 #include <linux/list.h>
  27 #include <linux/mutex.h>
  28 #include <linux/spinlock.h>
  29 #include <linux/string.h>
  30 #include <linux/qed/qed_ll2_if.h>
  31 #include "qed.h"
  32 #include "qed_cxt.h"
  33 #include "qed_dev_api.h"
  34 #include "qed_hsi.h"
  35 #include "qed_hw.h"
  36 #include "qed_int.h"
  37 #include "qed_ll2.h"
  38 #include "qed_mcp.h"
  39 #include "qed_reg_addr.h"
  40 #include "qed_sp.h"
  41
  42 #define QED_LL2_RX_REGISTERED(ll2)      ((ll2)->rx_queue.b_cb_registred)
  43 #define QED_LL2_TX_REGISTERED(ll2)      ((ll2)->tx_queue.b_cb_registred)
  44
  45 #define QED_LL2_TX_SIZE (256)
  46 #define QED_LL2_RX_SIZE (4096)
  47
  48 struct qed_cb_ll2_info {
  49         int rx_cnt;
  50         u32 rx_size;
  51         u8 handle;
  52         bool frags_mapped;
  53
  54         /* Lock protecting LL2 buffer lists in sleepless context */
  55         spinlock_t lock;
  56         struct list_head list;
  57
  58         const struct qed_ll2_cb_ops *cbs;
  59         void *cb_cookie;
  60 };
  61
  62 struct qed_ll2_buffer {
  63         struct list_head list;
  64         void *data;
  65         dma_addr_t phys_addr;
  66 };
  67
  68 static void qed_ll2b_complete_tx_packet(struct qed_hwfn *p_hwfn,
  69                                         u8 connection_handle,
  70                                         void *cookie,
  71                                         dma_addr_t first_frag_addr,
  72                                         bool b_last_fragment,
  73                                         bool b_last_packet)
  74 {
  75         struct qed_dev *cdev = p_hwfn->cdev;
  76         struct sk_buff *skb = cookie;
  77
  78         /* All we need to do is release the mapping */
  79         dma_unmap_single(&p_hwfn->cdev->pdev->dev, first_frag_addr,
  80                          skb_headlen(skb), DMA_TO_DEVICE);
  81
  82         if (cdev->ll2->cbs && cdev->ll2->cbs->tx_cb)
  83                 cdev->ll2->cbs->tx_cb(cdev->ll2->cb_cookie, skb,
  84                                       b_last_fragment);
  85
  86         if (cdev->ll2->frags_mapped)
  87                 /* Case where mapped frags were received, need to
  88                  * free skb with nr_frags marked as 0
  89                  */
  90                 skb_shinfo(skb)->nr_frags = 0;
  91
  92         dev_kfree_skb_any(skb);
  93 }
  94
  95 static int qed_ll2_alloc_buffer(struct qed_dev *cdev,
  96                                 u8 **data, dma_addr_t *phys_addr)
  97 {
  98         *data = kmalloc(cdev->ll2->rx_size, GFP_ATOMIC);
  99         if (!(*data)) {
 100                 DP_INFO(cdev, "Failed to allocate LL2 buffer data\n");
 101                 return -ENOMEM;
 102         }
 103
 104         *phys_addr = dma_map_single(&cdev->pdev->dev,
 105                                     ((*data) + NET_SKB_PAD),
 106                                     cdev->ll2->rx_size, DMA_FROM_DEVICE);
 107         if (dma_mapping_error(&cdev->pdev->dev, *phys_addr)) {
 108                 DP_INFO(cdev, "Failed to map LL2 buffer data\n");
 109                 kfree((*data));
 110                 return -ENOMEM;
 111         }
 112
 113         return 0;
 114 }
 115
 116 static int qed_ll2_dealloc_buffer(struct qed_dev *cdev,
 117                                  struct qed_ll2_buffer *buffer)
 118 {
 119         spin_lock_bh(&cdev->ll2->lock);
 120
 121         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
 122                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
 123         kfree(buffer->data);
 124         list_del(&buffer->list);
 125
 126         cdev->ll2->rx_cnt--;
 127         if (!cdev->ll2->rx_cnt)
 128                 DP_INFO(cdev, "All LL2 entries were removed\n");
 129
 130         spin_unlock_bh(&cdev->ll2->lock);
 131
 132         return 0;
 133 }
 134
 135 static void qed_ll2_kill_buffers(struct qed_dev *cdev)
 136 {
 137         struct qed_ll2_buffer *buffer, *tmp_buffer;
 138
 139         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list)
 140                 qed_ll2_dealloc_buffer(cdev, buffer);
 141 }
 142
 143 void qed_ll2b_complete_rx_packet(struct qed_hwfn *p_hwfn,
 144                                  u8 connection_handle,
 145                                  struct qed_ll2_rx_packet *p_pkt,
 146                                  struct core_rx_fast_path_cqe *p_cqe,
 147                                  bool b_last_packet)
 148 {
 149         u16 packet_length = le16_to_cpu(p_cqe->packet_length);
 150         struct qed_ll2_buffer *buffer = p_pkt->cookie;
 151         struct qed_dev *cdev = p_hwfn->cdev;
 152         u16 vlan = le16_to_cpu(p_cqe->vlan);
 153         u32 opaque_data_0, opaque_data_1;
 154         u8 pad = p_cqe->placement_offset;
 155         dma_addr_t new_phys_addr;
 156         struct sk_buff *skb;
 157         bool reuse = false;
 158         int rc = -EINVAL;
 159         u8 *new_data;
 160
 161         opaque_data_0 = le32_to_cpu(p_cqe->opaque_data.data[0]);
 162         opaque_data_1 = le32_to_cpu(p_cqe->opaque_data.data[1]);
 163
 164         DP_VERBOSE(p_hwfn,
 165                    (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA),
 166                    "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",
 167                    (u64)p_pkt->rx_buf_addr, pad, packet_length,
 168                    le16_to_cpu(p_cqe->parse_flags.flags), vlan,
 169                    opaque_data_0, opaque_data_1);
 170
 171         if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) {
 172                 print_hex_dump(KERN_INFO, "",
 173                                DUMP_PREFIX_OFFSET, 16, 1,
 174                                buffer->data, packet_length, false);
 175         }
 176
 177         /* Determine if data is valid */
 178         if (packet_length < ETH_HLEN)
 179                 reuse = true;
 180
 181         /* Allocate a replacement for buffer; Reuse upon failure */
 182         if (!reuse)
 183                 rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data,
 184                                           &new_phys_addr);
 185
 186         /* If need to reuse or there's no replacement buffer, repost this */
 187         if (rc)
 188                 goto out_post;
 189
 190         skb = build_skb(buffer->data, 0);
 191         if (!skb) {
 192                 rc = -ENOMEM;
 193                 goto out_post;
 194         }
 195
 196         pad += NET_SKB_PAD;
 197         skb_reserve(skb, pad);
 198         skb_put(skb, packet_length);
 199         skb_checksum_none_assert(skb);
 200
 201         /* Get parital ethernet information instead of eth_type_trans(),
 202          * Since we don't have an associated net_device.
 203          */
 204         skb_reset_mac_header(skb);
 205         skb->protocol = eth_hdr(skb)->h_proto;
 206
 207         /* Pass SKB onward */
 208         if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) {
 209                 if (vlan)
 210                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
 211                 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb,
 212                                       opaque_data_0, opaque_data_1);
 213         }
 214
 215         /* Update Buffer information and update FW producer */
 216         buffer->data = new_data;
 217         buffer->phys_addr = new_phys_addr;
 218
 219 out_post:
 220         rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), cdev->ll2->handle,
 221                                     buffer->phys_addr, 0,  buffer, 1);
 222
 223         if (rc)
 224                 qed_ll2_dealloc_buffer(cdev, buffer);
 225 }
 226
 227 static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 228                                                     u8 connection_handle,
 229                                                     bool b_lock,
 230                                                     bool b_only_active)
 231 {
 232         struct qed_ll2_info *p_ll2_conn, *p_ret = NULL;
 233
 234         if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS)
 235                 return NULL;
 236
 237         if (!p_hwfn->p_ll2_info)
 238                 return NULL;
 239
 240         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
 241
 242         if (b_only_active) {
 243                 if (b_lock)
 244                         mutex_lock(&p_ll2_conn->mutex);
 245                 if (p_ll2_conn->b_active)
 246                         p_ret = p_ll2_conn;
 247                 if (b_lock)
 248                         mutex_unlock(&p_ll2_conn->mutex);
 249         } else {
 250                 p_ret = p_ll2_conn;
 251         }
 252
 253         return p_ret;
 254 }
 255
 256 static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 257                                                   u8 connection_handle)
 258 {
 259         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true);
 260 }
 261
 262 static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn,
 263                                                        u8 connection_handle)
 264 {
 265         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true);
 266 }
 267
 268 static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn
 269                                                            *p_hwfn,
 270                                                            u8 connection_handle)
 271 {
 272         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false);
 273 }
 274
 275 static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 276 {
 277         bool b_last_packet = false, b_last_frag = false;
 278         struct qed_ll2_tx_packet *p_pkt = NULL;
 279         struct qed_ll2_info *p_ll2_conn;
 280         struct qed_ll2_tx_queue *p_tx;
 281         dma_addr_t tx_frag;
 282
 283         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 284         if (!p_ll2_conn)
 285                 return;
 286
 287         p_tx = &p_ll2_conn->tx_queue;
 288
 289         while (!list_empty(&p_tx->active_descq)) {
 290                 p_pkt = list_first_entry(&p_tx->active_descq,
 291                                          struct qed_ll2_tx_packet, list_entry);
 292                 if (!p_pkt)
 293                         break;
 294
 295                 list_del(&p_pkt->list_entry);
 296                 b_last_packet = list_empty(&p_tx->active_descq);
 297                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 298                 p_tx->cur_completing_packet = *p_pkt;
 299                 p_tx->cur_completing_bd_idx = 1;
 300                 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 301                 tx_frag = p_pkt->bds_set[0].tx_frag;
 302                 if (p_ll2_conn->gsi_enable)
 303                         qed_ll2b_release_tx_gsi_packet(p_hwfn,
 304                                                        p_ll2_conn->my_id,
 305                                                        p_pkt->cookie,
 306                                                        tx_frag,
 307                                                        b_last_frag,
 308                                                        b_last_packet);
 309                 else
 310                         qed_ll2b_complete_tx_packet(p_hwfn,
 311                                                     p_ll2_conn->my_id,
 312                                                     p_pkt->cookie,
 313                                                     tx_frag,
 314                                                     b_last_frag,
 315                                                     b_last_packet);
 316
 317         }
 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         dma_addr_t tx_frag;
 329         int rc = -EINVAL;
 330
 331         spin_lock_irqsave(&p_tx->lock, flags);
 332         if (p_tx->b_completing_packet) {
 333                 rc = -EBUSY;
 334                 goto out;
 335         }
 336
 337         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 338         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 339         while (num_bds) {
 340                 if (list_empty(&p_tx->active_descq))
 341                         goto out;
 342
 343                 p_pkt = list_first_entry(&p_tx->active_descq,
 344                                          struct qed_ll2_tx_packet, list_entry);
 345                 if (!p_pkt)
 346                         goto out;
 347
 348                 p_tx->b_completing_packet = true;
 349                 p_tx->cur_completing_packet = *p_pkt;
 350                 num_bds_in_packet = p_pkt->bd_used;
 351                 list_del(&p_pkt->list_entry);
 352
 353                 if (num_bds < num_bds_in_packet) {
 354                         DP_NOTICE(p_hwfn,
 355                                   "Rest of BDs does not cover whole packet\n");
 356                         goto out;
 357                 }
 358
 359                 num_bds -= num_bds_in_packet;
 360                 p_tx->bds_idx += num_bds_in_packet;
 361                 while (num_bds_in_packet--)
 362                         qed_chain_consume(&p_tx->txq_chain);
 363
 364                 p_tx->cur_completing_bd_idx = 1;
 365                 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 366                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 367
 368                 spin_unlock_irqrestore(&p_tx->lock, flags);
 369                 tx_frag = p_pkt->bds_set[0].tx_frag;
 370                 if (p_ll2_conn->gsi_enable)
 371                         qed_ll2b_complete_tx_gsi_packet(p_hwfn,
 372                                                         p_ll2_conn->my_id,
 373                                                         p_pkt->cookie,
 374                                                         tx_frag,
 375                                                         b_last_frag, !num_bds);
 376                 else
 377                         qed_ll2b_complete_tx_packet(p_hwfn,
 378                                                     p_ll2_conn->my_id,
 379                                                     p_pkt->cookie,
 380                                                     tx_frag,
 381                                                     b_last_frag, !num_bds);
 382                 spin_lock_irqsave(&p_tx->lock, flags);
 383         }
 384
 385         p_tx->b_completing_packet = false;
 386         rc = 0;
 387 out:
 388         spin_unlock_irqrestore(&p_tx->lock, flags);
 389         return rc;
 390 }
 391
 392 static int
 393 qed_ll2_rxq_completion_gsi(struct qed_hwfn *p_hwfn,
 394                            struct qed_ll2_info *p_ll2_info,
 395                            union core_rx_cqe_union *p_cqe,
 396                            unsigned long lock_flags, bool b_last_cqe)
 397 {
 398         struct qed_ll2_rx_queue *p_rx = &p_ll2_info->rx_queue;
 399         struct qed_ll2_rx_packet *p_pkt = NULL;
 400         u16 packet_length, parse_flags, vlan;
 401         u32 src_mac_addrhi;
 402         u16 src_mac_addrlo;
 403
 404         if (!list_empty(&p_rx->active_descq))
 405                 p_pkt = list_first_entry(&p_rx->active_descq,
 406                                          struct qed_ll2_rx_packet, list_entry);
 407         if (!p_pkt) {
 408                 DP_NOTICE(p_hwfn,
 409                           "GSI Rx completion but active_descq is empty\n");
 410                 return -EIO;
 411         }
 412
 413         list_del(&p_pkt->list_entry);
 414         parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags);
 415         packet_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length);
 416         vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan);
 417         src_mac_addrhi = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi);
 418         src_mac_addrlo = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo);
 419         if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)
 420                 DP_NOTICE(p_hwfn,
 421                           "Mismatch between active_descq and the LL2 Rx chain\n");
 422         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 423
 424         spin_unlock_irqrestore(&p_rx->lock, lock_flags);
 425         qed_ll2b_complete_rx_gsi_packet(p_hwfn,
 426                                         p_ll2_info->my_id,
 427                                         p_pkt->cookie,
 428                                         p_pkt->rx_buf_addr,
 429                                         packet_length,
 430                                         p_cqe->rx_cqe_gsi.data_length_error,
 431                                         parse_flags,
 432                                         vlan,
 433                                         src_mac_addrhi,
 434                                         src_mac_addrlo, b_last_cqe);
 435         spin_lock_irqsave(&p_rx->lock, lock_flags);
 436
 437         return 0;
 438 }
 439
 440 static int qed_ll2_rxq_completion_reg(struct qed_hwfn *p_hwfn,
 441                                       struct qed_ll2_info *p_ll2_conn,
 442                                       union core_rx_cqe_union *p_cqe,
 443                                       unsigned long lock_flags,
 444                                       bool b_last_cqe)
 445 {
 446         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 447         struct qed_ll2_rx_packet *p_pkt = NULL;
 448
 449         if (!list_empty(&p_rx->active_descq))
 450                 p_pkt = list_first_entry(&p_rx->active_descq,
 451                                          struct qed_ll2_rx_packet, list_entry);
 452         if (!p_pkt) {
 453                 DP_NOTICE(p_hwfn,
 454                           "LL2 Rx completion but active_descq is empty\n");
 455                 return -EIO;
 456         }
 457         list_del(&p_pkt->list_entry);
 458
 459         if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)
 460                 DP_NOTICE(p_hwfn,
 461                           "Mismatch between active_descq and the LL2 Rx chain\n");
 462         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 463
 464         spin_unlock_irqrestore(&p_rx->lock, lock_flags);
 465         qed_ll2b_complete_rx_packet(p_hwfn, p_ll2_conn->my_id,
 466                                     p_pkt, &p_cqe->rx_cqe_fp, b_last_cqe);
 467         spin_lock_irqsave(&p_rx->lock, lock_flags);
 468
 469         return 0;
 470 }
 471
 472 static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie)
 473 {
 474         struct qed_ll2_info *p_ll2_conn = cookie;
 475         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 476         union core_rx_cqe_union *cqe = NULL;
 477         u16 cq_new_idx = 0, cq_old_idx = 0;
 478         unsigned long flags = 0;
 479         int rc = 0;
 480
 481         spin_lock_irqsave(&p_rx->lock, flags);
 482         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 483         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 484
 485         while (cq_new_idx != cq_old_idx) {
 486                 bool b_last_cqe = (cq_new_idx == cq_old_idx);
 487
 488                 cqe = qed_chain_consume(&p_rx->rcq_chain);
 489                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 490
 491                 DP_VERBOSE(p_hwfn,
 492                            QED_MSG_LL2,
 493                            "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n",
 494                            cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type);
 495
 496                 switch (cqe->rx_cqe_sp.type) {
 497                 case CORE_RX_CQE_TYPE_SLOW_PATH:
 498                         DP_NOTICE(p_hwfn, "LL2 - unexpected Rx CQE slowpath\n");
 499                         rc = -EINVAL;
 500                         break;
 501                 case CORE_RX_CQE_TYPE_GSI_OFFLOAD:
 502                         rc = qed_ll2_rxq_completion_gsi(p_hwfn, p_ll2_conn,
 503                                                         cqe, flags, b_last_cqe);
 504                         break;
 505                 case CORE_RX_CQE_TYPE_REGULAR:
 506                         rc = qed_ll2_rxq_completion_reg(p_hwfn, p_ll2_conn,
 507                                                         cqe, flags, b_last_cqe);
 508                         break;
 509                 default:
 510                         rc = -EIO;
 511                 }
 512         }
 513
 514         spin_unlock_irqrestore(&p_rx->lock, flags);
 515         return rc;
 516 }
 517
 518 void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 519 {
 520         struct qed_ll2_info *p_ll2_conn = NULL;
 521         struct qed_ll2_rx_packet *p_pkt = NULL;
 522         struct qed_ll2_rx_queue *p_rx;
 523
 524         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 525         if (!p_ll2_conn)
 526                 return;
 527
 528         p_rx = &p_ll2_conn->rx_queue;
 529
 530         while (!list_empty(&p_rx->active_descq)) {
 531                 dma_addr_t rx_buf_addr;
 532                 void *cookie;
 533                 bool b_last;
 534
 535                 p_pkt = list_first_entry(&p_rx->active_descq,
 536                                          struct qed_ll2_rx_packet, list_entry);
 537                 if (!p_pkt)
 538                         break;
 539
 540                 list_del(&p_pkt->list_entry);
 541                 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 542
 543                 rx_buf_addr = p_pkt->rx_buf_addr;
 544                 cookie = p_pkt->cookie;
 545
 546                 b_last = list_empty(&p_rx->active_descq);
 547         }
 548 }
 549
 550 static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn,
 551                                      struct qed_ll2_info *p_ll2_conn,
 552                                      u8 action_on_error)
 553 {
 554         enum qed_ll2_conn_type conn_type = p_ll2_conn->conn_type;
 555         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 556         struct core_rx_start_ramrod_data *p_ramrod = NULL;
 557         struct qed_spq_entry *p_ent = NULL;
 558         struct qed_sp_init_data init_data;
 559         u16 cqe_pbl_size;
 560         int rc = 0;
 561
 562         /* Get SPQ entry */
 563         memset(&init_data, 0, sizeof(init_data));
 564         init_data.cid = p_ll2_conn->cid;
 565         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 566         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 567
 568         rc = qed_sp_init_request(p_hwfn, &p_ent,
 569                                  CORE_RAMROD_RX_QUEUE_START,
 570                                  PROTOCOLID_CORE, &init_data);
 571         if (rc)
 572                 return rc;
 573
 574         p_ramrod = &p_ent->ramrod.core_rx_queue_start;
 575
 576         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
 577         p_ramrod->sb_index = p_rx->rx_sb_index;
 578         p_ramrod->complete_event_flg = 1;
 579
 580         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->mtu);
 581         DMA_REGPAIR_LE(p_ramrod->bd_base,
 582                        p_rx->rxq_chain.p_phys_addr);
 583         cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain);
 584         p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size);
 585         DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr,
 586                        qed_chain_get_pbl_phys(&p_rx->rcq_chain));
 587
 588         p_ramrod->drop_ttl0_flg = p_ll2_conn->rx_drop_ttl0_flg;
 589         p_ramrod->inner_vlan_removal_en = p_ll2_conn->rx_vlan_removal_en;
 590         p_ramrod->queue_id = p_ll2_conn->queue_id;
 591         p_ramrod->main_func_queue = 1;
 592
 593         if ((IS_MF_DEFAULT(p_hwfn) || IS_MF_SI(p_hwfn)) &&
 594             p_ramrod->main_func_queue && (conn_type != QED_LL2_TYPE_ROCE)) {
 595                 p_ramrod->mf_si_bcast_accept_all = 1;
 596                 p_ramrod->mf_si_mcast_accept_all = 1;
 597         } else {
 598                 p_ramrod->mf_si_bcast_accept_all = 0;
 599                 p_ramrod->mf_si_mcast_accept_all = 0;
 600         }
 601
 602         p_ramrod->action_on_error.error_type = action_on_error;
 603         p_ramrod->gsi_offload_flag = p_ll2_conn->gsi_enable;
 604         return qed_spq_post(p_hwfn, p_ent, NULL);
 605 }
 606
 607 static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
 608                                      struct qed_ll2_info *p_ll2_conn)
 609 {
 610         enum qed_ll2_conn_type conn_type = p_ll2_conn->conn_type;
 611         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 612         struct core_tx_start_ramrod_data *p_ramrod = NULL;
 613         struct qed_spq_entry *p_ent = NULL;
 614         struct qed_sp_init_data init_data;
 615         union qed_qm_pq_params pq_params;
 616         u16 pq_id = 0, pbl_size;
 617         int rc = -EINVAL;
 618
 619         if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
 620                 return 0;
 621
 622         /* Get SPQ entry */
 623         memset(&init_data, 0, sizeof(init_data));
 624         init_data.cid = p_ll2_conn->cid;
 625         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 626         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 627
 628         rc = qed_sp_init_request(p_hwfn, &p_ent,
 629                                  CORE_RAMROD_TX_QUEUE_START,
 630                                  PROTOCOLID_CORE, &init_data);
 631         if (rc)
 632                 return rc;
 633
 634         p_ramrod = &p_ent->ramrod.core_tx_queue_start;
 635
 636         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
 637         p_ramrod->sb_index = p_tx->tx_sb_index;
 638         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->mtu);
 639         p_ll2_conn->tx_stats_en = 1;
 640         p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
 641         p_ramrod->stats_id = p_ll2_conn->tx_stats_id;
 642
 643         DMA_REGPAIR_LE(p_ramrod->pbl_base_addr,
 644                        qed_chain_get_pbl_phys(&p_tx->txq_chain));
 645         pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain);
 646         p_ramrod->pbl_size = cpu_to_le16(pbl_size);
 647
 648         memset(&pq_params, 0, sizeof(pq_params));
 649         pq_params.core.tc = p_ll2_conn->tx_tc;
 650         pq_id = qed_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params);
 651         p_ramrod->qm_pq_id = cpu_to_le16(pq_id);
 652
 653         switch (conn_type) {
 654         case QED_LL2_TYPE_ISCSI:
 655         case QED_LL2_TYPE_ISCSI_OOO:
 656                 p_ramrod->conn_type = PROTOCOLID_ISCSI;
 657                 break;
 658         case QED_LL2_TYPE_ROCE:
 659                 p_ramrod->conn_type = PROTOCOLID_ROCE;
 660                 break;
 661         default:
 662                 p_ramrod->conn_type = PROTOCOLID_ETH;
 663                 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type);
 664         }
 665
 666         p_ramrod->gsi_offload_flag = p_ll2_conn->gsi_enable;
 667         return qed_spq_post(p_hwfn, p_ent, NULL);
 668 }
 669
 670 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn,
 671                                     struct qed_ll2_info *p_ll2_conn)
 672 {
 673         struct core_rx_stop_ramrod_data *p_ramrod = NULL;
 674         struct qed_spq_entry *p_ent = NULL;
 675         struct qed_sp_init_data init_data;
 676         int rc = -EINVAL;
 677
 678         /* Get SPQ entry */
 679         memset(&init_data, 0, sizeof(init_data));
 680         init_data.cid = p_ll2_conn->cid;
 681         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 682         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 683
 684         rc = qed_sp_init_request(p_hwfn, &p_ent,
 685                                  CORE_RAMROD_RX_QUEUE_STOP,
 686                                  PROTOCOLID_CORE, &init_data);
 687         if (rc)
 688                 return rc;
 689
 690         p_ramrod = &p_ent->ramrod.core_rx_queue_stop;
 691
 692         p_ramrod->complete_event_flg = 1;
 693         p_ramrod->queue_id = p_ll2_conn->queue_id;
 694
 695         return qed_spq_post(p_hwfn, p_ent, NULL);
 696 }
 697
 698 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn,
 699                                     struct qed_ll2_info *p_ll2_conn)
 700 {
 701         struct qed_spq_entry *p_ent = NULL;
 702         struct qed_sp_init_data init_data;
 703         int rc = -EINVAL;
 704
 705         /* Get SPQ entry */
 706         memset(&init_data, 0, sizeof(init_data));
 707         init_data.cid = p_ll2_conn->cid;
 708         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 709         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 710
 711         rc = qed_sp_init_request(p_hwfn, &p_ent,
 712                                  CORE_RAMROD_TX_QUEUE_STOP,
 713                                  PROTOCOLID_CORE, &init_data);
 714         if (rc)
 715                 return rc;
 716
 717         return qed_spq_post(p_hwfn, p_ent, NULL);
 718 }
 719
 720 static int
 721 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
 722                               struct qed_ll2_info *p_ll2_info, u16 rx_num_desc)
 723 {
 724         struct qed_ll2_rx_packet *p_descq;
 725         u32 capacity;
 726         int rc = 0;
 727
 728         if (!rx_num_desc)
 729                 goto out;
 730
 731         rc = qed_chain_alloc(p_hwfn->cdev,
 732                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
 733                              QED_CHAIN_MODE_NEXT_PTR,
 734                              QED_CHAIN_CNT_TYPE_U16,
 735                              rx_num_desc,
 736                              sizeof(struct core_rx_bd),
 737                              &p_ll2_info->rx_queue.rxq_chain);
 738         if (rc) {
 739                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
 740                 goto out;
 741         }
 742
 743         capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
 744         p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet),
 745                           GFP_KERNEL);
 746         if (!p_descq) {
 747                 rc = -ENOMEM;
 748                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n");
 749                 goto out;
 750         }
 751         p_ll2_info->rx_queue.descq_array = p_descq;
 752
 753         rc = qed_chain_alloc(p_hwfn->cdev,
 754                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
 755                              QED_CHAIN_MODE_PBL,
 756                              QED_CHAIN_CNT_TYPE_U16,
 757                              rx_num_desc,
 758                              sizeof(struct core_rx_fast_path_cqe),
 759                              &p_ll2_info->rx_queue.rcq_chain);
 760         if (rc) {
 761                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
 762                 goto out;
 763         }
 764
 765         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
 766                    "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
 767                    p_ll2_info->conn_type, rx_num_desc);
 768
 769 out:
 770         return rc;
 771 }
 772
 773 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
 774                                          struct qed_ll2_info *p_ll2_info,
 775                                          u16 tx_num_desc)
 776 {
 777         struct qed_ll2_tx_packet *p_descq;
 778         u32 capacity;
 779         int rc = 0;
 780
 781         if (!tx_num_desc)
 782                 goto out;
 783
 784         rc = qed_chain_alloc(p_hwfn->cdev,
 785                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
 786                              QED_CHAIN_MODE_PBL,
 787                              QED_CHAIN_CNT_TYPE_U16,
 788                              tx_num_desc,
 789                              sizeof(struct core_tx_bd),
 790                              &p_ll2_info->tx_queue.txq_chain);
 791         if (rc)
 792                 goto out;
 793
 794         capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
 795         p_descq = kcalloc(capacity, sizeof(struct qed_ll2_tx_packet),
 796                           GFP_KERNEL);
 797         if (!p_descq) {
 798                 rc = -ENOMEM;
 799                 goto out;
 800         }
 801         p_ll2_info->tx_queue.descq_array = p_descq;
 802
 803         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
 804                    "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
 805                    p_ll2_info->conn_type, tx_num_desc);
 806
 807 out:
 808         if (rc)
 809                 DP_NOTICE(p_hwfn,
 810                           "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
 811                           tx_num_desc);
 812         return rc;
 813 }
 814
 815 int qed_ll2_acquire_connection(struct qed_hwfn *p_hwfn,
 816                                struct qed_ll2_info *p_params,
 817                                u16 rx_num_desc,
 818                                u16 tx_num_desc,
 819                                u8 *p_connection_handle)
 820 {
 821         qed_int_comp_cb_t comp_rx_cb, comp_tx_cb;
 822         struct qed_ll2_info *p_ll2_info = NULL;
 823         int rc;
 824         u8 i;
 825
 826         if (!p_connection_handle || !p_hwfn->p_ll2_info)
 827                 return -EINVAL;
 828
 829         /* Find a free connection to be used */
 830         for (i = 0; (i < QED_MAX_NUM_OF_LL2_CONNECTIONS); i++) {
 831                 mutex_lock(&p_hwfn->p_ll2_info[i].mutex);
 832                 if (p_hwfn->p_ll2_info[i].b_active) {
 833                         mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
 834                         continue;
 835                 }
 836
 837                 p_hwfn->p_ll2_info[i].b_active = true;
 838                 p_ll2_info = &p_hwfn->p_ll2_info[i];
 839                 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
 840                 break;
 841         }
 842         if (!p_ll2_info)
 843                 return -EBUSY;
 844
 845         p_ll2_info->conn_type = p_params->conn_type;
 846         p_ll2_info->mtu = p_params->mtu;
 847         p_ll2_info->rx_drop_ttl0_flg = p_params->rx_drop_ttl0_flg;
 848         p_ll2_info->rx_vlan_removal_en = p_params->rx_vlan_removal_en;
 849         p_ll2_info->tx_tc = p_params->tx_tc;
 850         p_ll2_info->tx_dest = p_params->tx_dest;
 851         p_ll2_info->ai_err_packet_too_big = p_params->ai_err_packet_too_big;
 852         p_ll2_info->ai_err_no_buf = p_params->ai_err_no_buf;
 853         p_ll2_info->gsi_enable = p_params->gsi_enable;
 854
 855         rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info, rx_num_desc);
 856         if (rc)
 857                 goto q_allocate_fail;
 858
 859         rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info, tx_num_desc);
 860         if (rc)
 861                 goto q_allocate_fail;
 862
 863         /* Register callbacks for the Rx/Tx queues */
 864         comp_rx_cb = qed_ll2_rxq_completion;
 865         comp_tx_cb = qed_ll2_txq_completion;
 866
 867         if (rx_num_desc) {
 868                 qed_int_register_cb(p_hwfn, comp_rx_cb,
 869                                     &p_hwfn->p_ll2_info[i],
 870                                     &p_ll2_info->rx_queue.rx_sb_index,
 871                                     &p_ll2_info->rx_queue.p_fw_cons);
 872                 p_ll2_info->rx_queue.b_cb_registred = true;
 873         }
 874
 875         if (tx_num_desc) {
 876                 qed_int_register_cb(p_hwfn,
 877                                     comp_tx_cb,
 878                                     &p_hwfn->p_ll2_info[i],
 879                                     &p_ll2_info->tx_queue.tx_sb_index,
 880                                     &p_ll2_info->tx_queue.p_fw_cons);
 881                 p_ll2_info->tx_queue.b_cb_registred = true;
 882         }
 883
 884         *p_connection_handle = i;
 885         return rc;
 886
 887 q_allocate_fail:
 888         qed_ll2_release_connection(p_hwfn, i);
 889         return -ENOMEM;
 890 }
 891
 892 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn,
 893                                            struct qed_ll2_info *p_ll2_conn)
 894 {
 895         u8 action_on_error = 0;
 896
 897         if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
 898                 return 0;
 899
 900         DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0);
 901
 902         SET_FIELD(action_on_error,
 903                   CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG,
 904                   p_ll2_conn->ai_err_packet_too_big);
 905         SET_FIELD(action_on_error,
 906                   CORE_RX_ACTION_ON_ERROR_NO_BUFF, p_ll2_conn->ai_err_no_buf);
 907
 908         return qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
 909 }
 910
 911 int qed_ll2_establish_connection(struct qed_hwfn *p_hwfn, u8 connection_handle)
 912 {
 913         struct qed_ll2_info *p_ll2_conn;
 914         struct qed_ll2_rx_queue *p_rx;
 915         struct qed_ll2_tx_queue *p_tx;
 916         int rc = -EINVAL;
 917         u32 i, capacity;
 918         u8 qid;
 919
 920         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
 921         if (!p_ll2_conn)
 922                 return -EINVAL;
 923         p_rx = &p_ll2_conn->rx_queue;
 924         p_tx = &p_ll2_conn->tx_queue;
 925
 926         qed_chain_reset(&p_rx->rxq_chain);
 927         qed_chain_reset(&p_rx->rcq_chain);
 928         INIT_LIST_HEAD(&p_rx->active_descq);
 929         INIT_LIST_HEAD(&p_rx->free_descq);
 930         INIT_LIST_HEAD(&p_rx->posting_descq);
 931         spin_lock_init(&p_rx->lock);
 932         capacity = qed_chain_get_capacity(&p_rx->rxq_chain);
 933         for (i = 0; i < capacity; i++)
 934                 list_add_tail(&p_rx->descq_array[i].list_entry,
 935                               &p_rx->free_descq);
 936         *p_rx->p_fw_cons = 0;
 937
 938         qed_chain_reset(&p_tx->txq_chain);
 939         INIT_LIST_HEAD(&p_tx->active_descq);
 940         INIT_LIST_HEAD(&p_tx->free_descq);
 941         INIT_LIST_HEAD(&p_tx->sending_descq);
 942         spin_lock_init(&p_tx->lock);
 943         capacity = qed_chain_get_capacity(&p_tx->txq_chain);
 944         for (i = 0; i < capacity; i++)
 945                 list_add_tail(&p_tx->descq_array[i].list_entry,
 946                               &p_tx->free_descq);
 947         p_tx->cur_completing_bd_idx = 0;
 948         p_tx->bds_idx = 0;
 949         p_tx->b_completing_packet = false;
 950         p_tx->cur_send_packet = NULL;
 951         p_tx->cur_send_frag_num = 0;
 952         p_tx->cur_completing_frag_num = 0;
 953         *p_tx->p_fw_cons = 0;
 954
 955         qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
 956
 957         qid = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] + connection_handle;
 958         p_ll2_conn->queue_id = qid;
 959         p_ll2_conn->tx_stats_id = qid;
 960         p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview +
 961                                             GTT_BAR0_MAP_REG_TSDM_RAM +
 962                                             TSTORM_LL2_RX_PRODS_OFFSET(qid);
 963         p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells +
 964                                             qed_db_addr(p_ll2_conn->cid,
 965                                                         DQ_DEMS_LEGACY);
 966
 967         rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
 968         if (rc)
 969                 return rc;
 970
 971         rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
 972         if (rc)
 973                 return rc;
 974
 975         if (p_hwfn->hw_info.personality != QED_PCI_ETH_ROCE)
 976                 qed_wr(p_hwfn, p_hwfn->p_main_ptt, PRS_REG_USE_LIGHT_L2, 1);
 977
 978         return rc;
 979 }
 980
 981 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn,
 982                                              struct qed_ll2_rx_queue *p_rx,
 983                                              struct qed_ll2_rx_packet *p_curp)
 984 {
 985         struct qed_ll2_rx_packet *p_posting_packet = NULL;
 986         struct core_ll2_rx_prod rx_prod = { 0, 0, 0 };
 987         bool b_notify_fw = false;
 988         u16 bd_prod, cq_prod;
 989
 990         /* This handles the flushing of already posted buffers */
 991         while (!list_empty(&p_rx->posting_descq)) {
 992                 p_posting_packet = list_first_entry(&p_rx->posting_descq,
 993                                                     struct qed_ll2_rx_packet,
 994                                                     list_entry);
 995                 list_del(&p_posting_packet->list_entry);
 996                 list_add_tail(&p_posting_packet->list_entry,
 997                               &p_rx->active_descq);
 998                 b_notify_fw = true;
 999         }
1000
1001         /* This handles the supplied packet [if there is one] */
1002         if (p_curp) {
1003                 list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
1004                 b_notify_fw = true;
1005         }
1006
1007         if (!b_notify_fw)
1008                 return;
1009
1010         bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
1011         cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
1012         rx_prod.bd_prod = cpu_to_le16(bd_prod);
1013         rx_prod.cqe_prod = cpu_to_le16(cq_prod);
1014         DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
1015 }
1016
1017 int qed_ll2_post_rx_buffer(struct qed_hwfn *p_hwfn,
1018                            u8 connection_handle,
1019                            dma_addr_t addr,
1020                            u16 buf_len, void *cookie, u8 notify_fw)
1021 {
1022         struct core_rx_bd_with_buff_len *p_curb = NULL;
1023         struct qed_ll2_rx_packet *p_curp = NULL;
1024         struct qed_ll2_info *p_ll2_conn;
1025         struct qed_ll2_rx_queue *p_rx;
1026         unsigned long flags;
1027         void *p_data;
1028         int rc = 0;
1029
1030         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1031         if (!p_ll2_conn)
1032                 return -EINVAL;
1033         p_rx = &p_ll2_conn->rx_queue;
1034
1035         spin_lock_irqsave(&p_rx->lock, flags);
1036         if (!list_empty(&p_rx->free_descq))
1037                 p_curp = list_first_entry(&p_rx->free_descq,
1038                                           struct qed_ll2_rx_packet, list_entry);
1039         if (p_curp) {
1040                 if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
1041                     qed_chain_get_elem_left(&p_rx->rcq_chain)) {
1042                         p_data = qed_chain_produce(&p_rx->rxq_chain);
1043                         p_curb = (struct core_rx_bd_with_buff_len *)p_data;
1044                         qed_chain_produce(&p_rx->rcq_chain);
1045                 }
1046         }
1047
1048         /* If we're lacking entires, let's try to flush buffers to FW */
1049         if (!p_curp || !p_curb) {
1050                 rc = -EBUSY;
1051                 p_curp = NULL;
1052                 goto out_notify;
1053         }
1054
1055         /* We have an Rx packet we can fill */
1056         DMA_REGPAIR_LE(p_curb->addr, addr);
1057         p_curb->buff_length = cpu_to_le16(buf_len);
1058         p_curp->rx_buf_addr = addr;
1059         p_curp->cookie = cookie;
1060         p_curp->rxq_bd = p_curb;
1061         p_curp->buf_length = buf_len;
1062         list_del(&p_curp->list_entry);
1063
1064         /* Check if we only want to enqueue this packet without informing FW */
1065         if (!notify_fw) {
1066                 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
1067                 goto out;
1068         }
1069
1070 out_notify:
1071         qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
1072 out:
1073         spin_unlock_irqrestore(&p_rx->lock, flags);
1074         return rc;
1075 }
1076
1077 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
1078                                           struct qed_ll2_tx_queue *p_tx,
1079                                           struct qed_ll2_tx_packet *p_curp,
1080                                           u8 num_of_bds,
1081                                           dma_addr_t first_frag,
1082                                           u16 first_frag_len, void *p_cookie,
1083                                           u8 notify_fw)
1084 {
1085         list_del(&p_curp->list_entry);
1086         p_curp->cookie = p_cookie;
1087         p_curp->bd_used = num_of_bds;
1088         p_curp->notify_fw = notify_fw;
1089         p_tx->cur_send_packet = p_curp;
1090         p_tx->cur_send_frag_num = 0;
1091
1092         p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = first_frag;
1093         p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = first_frag_len;
1094         p_tx->cur_send_frag_num++;
1095 }
1096
1097 static void qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
1098                                              struct qed_ll2_info *p_ll2,
1099                                              struct qed_ll2_tx_packet *p_curp,
1100                                              u8 num_of_bds,
1101                                              enum core_tx_dest tx_dest,
1102                                              u16 vlan,
1103                                              u8 bd_flags,
1104                                              u16 l4_hdr_offset_w,
1105                                              enum core_roce_flavor_type type,
1106                                              dma_addr_t first_frag,
1107                                              u16 first_frag_len)
1108 {
1109         struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
1110         u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
1111         struct core_tx_bd *start_bd = NULL;
1112         u16 frag_idx;
1113
1114         start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1115         start_bd->nw_vlan_or_lb_echo = cpu_to_le16(vlan);
1116         SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W,
1117                   cpu_to_le16(l4_hdr_offset_w));
1118         SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest);
1119         start_bd->bd_flags.as_bitfield = bd_flags;
1120         start_bd->bd_flags.as_bitfield |= CORE_TX_BD_FLAGS_START_BD_MASK <<
1121             CORE_TX_BD_FLAGS_START_BD_SHIFT;
1122         SET_FIELD(start_bd->bitfield0, CORE_TX_BD_NBDS, num_of_bds);
1123         DMA_REGPAIR_LE(start_bd->addr, first_frag);
1124         start_bd->nbytes = cpu_to_le16(first_frag_len);
1125
1126         SET_FIELD(start_bd->bd_flags.as_bitfield, CORE_TX_BD_FLAGS_ROCE_FLAV,
1127                   type);
1128
1129         DP_VERBOSE(p_hwfn,
1130                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1131                    "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",
1132                    p_ll2->queue_id,
1133                    p_ll2->cid,
1134                    p_ll2->conn_type,
1135                    prod_idx,
1136                    first_frag_len,
1137                    num_of_bds,
1138                    le32_to_cpu(start_bd->addr.hi),
1139                    le32_to_cpu(start_bd->addr.lo));
1140
1141         if (p_ll2->tx_queue.cur_send_frag_num == num_of_bds)
1142                 return;
1143
1144         /* Need to provide the packet with additional BDs for frags */
1145         for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
1146              frag_idx < num_of_bds; frag_idx++) {
1147                 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
1148
1149                 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1150                 (*p_bd)->bd_flags.as_bitfield = 0;
1151                 (*p_bd)->bitfield1 = 0;
1152                 (*p_bd)->bitfield0 = 0;
1153                 p_curp->bds_set[frag_idx].tx_frag = 0;
1154                 p_curp->bds_set[frag_idx].frag_len = 0;
1155         }
1156 }
1157
1158 /* This should be called while the Txq spinlock is being held */
1159 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
1160                                      struct qed_ll2_info *p_ll2_conn)
1161 {
1162         bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
1163         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1164         struct qed_ll2_tx_packet *p_pkt = NULL;
1165         struct core_db_data db_msg = { 0, 0, 0 };
1166         u16 bd_prod;
1167
1168         /* If there are missing BDs, don't do anything now */
1169         if (p_ll2_conn->tx_queue.cur_send_frag_num !=
1170             p_ll2_conn->tx_queue.cur_send_packet->bd_used)
1171                 return;
1172
1173         /* Push the current packet to the list and clean after it */
1174         list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
1175                       &p_ll2_conn->tx_queue.sending_descq);
1176         p_ll2_conn->tx_queue.cur_send_packet = NULL;
1177         p_ll2_conn->tx_queue.cur_send_frag_num = 0;
1178
1179         /* Notify FW of packet only if requested to */
1180         if (!b_notify)
1181                 return;
1182
1183         bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
1184
1185         while (!list_empty(&p_tx->sending_descq)) {
1186                 p_pkt = list_first_entry(&p_tx->sending_descq,
1187                                          struct qed_ll2_tx_packet, list_entry);
1188                 if (!p_pkt)
1189                         break;
1190
1191                 list_del(&p_pkt->list_entry);
1192                 list_add_tail(&p_pkt->list_entry, &p_tx->active_descq);
1193         }
1194
1195         SET_FIELD(db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
1196         SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
1197         SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
1198                   DQ_XCM_CORE_TX_BD_PROD_CMD);
1199         db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
1200         db_msg.spq_prod = cpu_to_le16(bd_prod);
1201
1202         /* Make sure the BDs data is updated before ringing the doorbell */
1203         wmb();
1204
1205         DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&db_msg));
1206
1207         DP_VERBOSE(p_hwfn,
1208                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1209                    "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
1210                    p_ll2_conn->queue_id,
1211                    p_ll2_conn->cid, p_ll2_conn->conn_type, db_msg.spq_prod);
1212 }
1213
1214 int qed_ll2_prepare_tx_packet(struct qed_hwfn *p_hwfn,
1215                               u8 connection_handle,
1216                               u8 num_of_bds,
1217                               u16 vlan,
1218                               u8 bd_flags,
1219                               u16 l4_hdr_offset_w,
1220                               enum qed_ll2_roce_flavor_type qed_roce_flavor,
1221                               dma_addr_t first_frag,
1222                               u16 first_frag_len, void *cookie, u8 notify_fw)
1223 {
1224         struct qed_ll2_tx_packet *p_curp = NULL;
1225         struct qed_ll2_info *p_ll2_conn = NULL;
1226         enum core_roce_flavor_type roce_flavor;
1227         struct qed_ll2_tx_queue *p_tx;
1228         struct qed_chain *p_tx_chain;
1229         unsigned long flags;
1230         int rc = 0;
1231
1232         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1233         if (!p_ll2_conn)
1234                 return -EINVAL;
1235         p_tx = &p_ll2_conn->tx_queue;
1236         p_tx_chain = &p_tx->txq_chain;
1237
1238         if (num_of_bds > CORE_LL2_TX_MAX_BDS_PER_PACKET)
1239                 return -EIO;
1240
1241         spin_lock_irqsave(&p_tx->lock, flags);
1242         if (p_tx->cur_send_packet) {
1243                 rc = -EEXIST;
1244                 goto out;
1245         }
1246
1247         /* Get entry, but only if we have tx elements for it */
1248         if (!list_empty(&p_tx->free_descq))
1249                 p_curp = list_first_entry(&p_tx->free_descq,
1250                                           struct qed_ll2_tx_packet, list_entry);
1251         if (p_curp && qed_chain_get_elem_left(p_tx_chain) < num_of_bds)
1252                 p_curp = NULL;
1253
1254         if (!p_curp) {
1255                 rc = -EBUSY;
1256                 goto out;
1257         }
1258
1259         if (qed_roce_flavor == QED_LL2_ROCE) {
1260                 roce_flavor = CORE_ROCE;
1261         } else if (qed_roce_flavor == QED_LL2_RROCE) {
1262                 roce_flavor = CORE_RROCE;
1263         } else {
1264                 rc = -EINVAL;
1265                 goto out;
1266         }
1267
1268         /* Prepare packet and BD, and perhaps send a doorbell to FW */
1269         qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp,
1270                                       num_of_bds, first_frag,
1271                                       first_frag_len, cookie, notify_fw);
1272         qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp,
1273                                          num_of_bds, CORE_TX_DEST_NW,
1274                                          vlan, bd_flags, l4_hdr_offset_w,
1275                                          roce_flavor,
1276                                          first_frag, first_frag_len);
1277
1278         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1279
1280 out:
1281         spin_unlock_irqrestore(&p_tx->lock, flags);
1282         return rc;
1283 }
1284
1285 int qed_ll2_set_fragment_of_tx_packet(struct qed_hwfn *p_hwfn,
1286                                       u8 connection_handle,
1287                                       dma_addr_t addr, u16 nbytes)
1288 {
1289         struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
1290         struct qed_ll2_info *p_ll2_conn = NULL;
1291         u16 cur_send_frag_num = 0;
1292         struct core_tx_bd *p_bd;
1293         unsigned long flags;
1294
1295         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1296         if (!p_ll2_conn)
1297                 return -EINVAL;
1298
1299         if (!p_ll2_conn->tx_queue.cur_send_packet)
1300                 return -EINVAL;
1301
1302         p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
1303         cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
1304
1305         if (cur_send_frag_num >= p_cur_send_packet->bd_used)
1306                 return -EINVAL;
1307
1308         /* Fill the BD information, and possibly notify FW */
1309         p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
1310         DMA_REGPAIR_LE(p_bd->addr, addr);
1311         p_bd->nbytes = cpu_to_le16(nbytes);
1312         p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
1313         p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
1314
1315         p_ll2_conn->tx_queue.cur_send_frag_num++;
1316
1317         spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
1318         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1319         spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
1320
1321         return 0;
1322 }
1323
1324 int qed_ll2_terminate_connection(struct qed_hwfn *p_hwfn, u8 connection_handle)
1325 {
1326         struct qed_ll2_info *p_ll2_conn = NULL;
1327         int rc = -EINVAL;
1328
1329         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1330         if (!p_ll2_conn)
1331                 return -EINVAL;
1332
1333         /* Stop Tx & Rx of connection, if needed */
1334         if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
1335                 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
1336                 if (rc)
1337                         return rc;
1338                 qed_ll2_txq_flush(p_hwfn, connection_handle);
1339         }
1340
1341         if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
1342                 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
1343                 if (rc)
1344                         return rc;
1345                 qed_ll2_rxq_flush(p_hwfn, connection_handle);
1346         }
1347
1348         return rc;
1349 }
1350
1351 void qed_ll2_release_connection(struct qed_hwfn *p_hwfn, u8 connection_handle)
1352 {
1353         struct qed_ll2_info *p_ll2_conn = NULL;
1354
1355         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1356         if (!p_ll2_conn)
1357                 return;
1358
1359         if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
1360                 p_ll2_conn->rx_queue.b_cb_registred = false;
1361                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
1362         }
1363
1364         if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
1365                 p_ll2_conn->tx_queue.b_cb_registred = false;
1366                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
1367         }
1368
1369         kfree(p_ll2_conn->tx_queue.descq_array);
1370         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
1371
1372         kfree(p_ll2_conn->rx_queue.descq_array);
1373         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
1374         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
1375
1376         qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
1377
1378         mutex_lock(&p_ll2_conn->mutex);
1379         p_ll2_conn->b_active = false;
1380         mutex_unlock(&p_ll2_conn->mutex);
1381 }
1382
1383 struct qed_ll2_info *qed_ll2_alloc(struct qed_hwfn *p_hwfn)
1384 {
1385         struct qed_ll2_info *p_ll2_connections;
1386         u8 i;
1387
1388         /* Allocate LL2's set struct */
1389         p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
1390                                     sizeof(struct qed_ll2_info), GFP_KERNEL);
1391         if (!p_ll2_connections) {
1392                 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
1393                 return NULL;
1394         }
1395
1396         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
1397                 p_ll2_connections[i].my_id = i;
1398
1399         return p_ll2_connections;
1400 }
1401
1402 void qed_ll2_setup(struct qed_hwfn *p_hwfn,
1403                    struct qed_ll2_info *p_ll2_connections)
1404 {
1405         int i;
1406
1407         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
1408                 mutex_init(&p_ll2_connections[i].mutex);
1409 }
1410
1411 void qed_ll2_free(struct qed_hwfn *p_hwfn,
1412                   struct qed_ll2_info *p_ll2_connections)
1413 {
1414         kfree(p_ll2_connections);
1415 }
1416
1417 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,
1418                                 struct qed_ptt *p_ptt,
1419                                 struct qed_ll2_info *p_ll2_conn,
1420                                 struct qed_ll2_stats *p_stats)
1421 {
1422         struct core_ll2_tstorm_per_queue_stat tstats;
1423         u8 qid = p_ll2_conn->queue_id;
1424         u32 tstats_addr;
1425
1426         memset(&tstats, 0, sizeof(tstats));
1427         tstats_addr = BAR0_MAP_REG_TSDM_RAM +
1428                       CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
1429         qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
1430
1431         p_stats->packet_too_big_discard =
1432                         HILO_64_REGPAIR(tstats.packet_too_big_discard);
1433         p_stats->no_buff_discard = HILO_64_REGPAIR(tstats.no_buff_discard);
1434 }
1435
1436 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
1437                                 struct qed_ptt *p_ptt,
1438                                 struct qed_ll2_info *p_ll2_conn,
1439                                 struct qed_ll2_stats *p_stats)
1440 {
1441         struct core_ll2_ustorm_per_queue_stat ustats;
1442         u8 qid = p_ll2_conn->queue_id;
1443         u32 ustats_addr;
1444
1445         memset(&ustats, 0, sizeof(ustats));
1446         ustats_addr = BAR0_MAP_REG_USDM_RAM +
1447                       CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
1448         qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
1449
1450         p_stats->rcv_ucast_bytes = HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
1451         p_stats->rcv_mcast_bytes = HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
1452         p_stats->rcv_bcast_bytes = HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
1453         p_stats->rcv_ucast_pkts = HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
1454         p_stats->rcv_mcast_pkts = HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
1455         p_stats->rcv_bcast_pkts = HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
1456 }
1457
1458 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
1459                                 struct qed_ptt *p_ptt,
1460                                 struct qed_ll2_info *p_ll2_conn,
1461                                 struct qed_ll2_stats *p_stats)
1462 {
1463         struct core_ll2_pstorm_per_queue_stat pstats;
1464         u8 stats_id = p_ll2_conn->tx_stats_id;
1465         u32 pstats_addr;
1466
1467         memset(&pstats, 0, sizeof(pstats));
1468         pstats_addr = BAR0_MAP_REG_PSDM_RAM +
1469                       CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
1470         qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
1471
1472         p_stats->sent_ucast_bytes = HILO_64_REGPAIR(pstats.sent_ucast_bytes);
1473         p_stats->sent_mcast_bytes = HILO_64_REGPAIR(pstats.sent_mcast_bytes);
1474         p_stats->sent_bcast_bytes = HILO_64_REGPAIR(pstats.sent_bcast_bytes);
1475         p_stats->sent_ucast_pkts = HILO_64_REGPAIR(pstats.sent_ucast_pkts);
1476         p_stats->sent_mcast_pkts = HILO_64_REGPAIR(pstats.sent_mcast_pkts);
1477         p_stats->sent_bcast_pkts = HILO_64_REGPAIR(pstats.sent_bcast_pkts);
1478 }
1479
1480 int qed_ll2_get_stats(struct qed_hwfn *p_hwfn,
1481                       u8 connection_handle, struct qed_ll2_stats *p_stats)
1482 {
1483         struct qed_ll2_info *p_ll2_conn = NULL;
1484         struct qed_ptt *p_ptt;
1485
1486         memset(p_stats, 0, sizeof(*p_stats));
1487
1488         if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
1489             !p_hwfn->p_ll2_info)
1490                 return -EINVAL;
1491
1492         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
1493
1494         p_ptt = qed_ptt_acquire(p_hwfn);
1495         if (!p_ptt) {
1496                 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
1497                 return -EINVAL;
1498         }
1499
1500         _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
1501         _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
1502         if (p_ll2_conn->tx_stats_en)
1503                 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
1504
1505         qed_ptt_release(p_hwfn, p_ptt);
1506         return 0;
1507 }
1508
1509 static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
1510                                     const struct qed_ll2_cb_ops *ops,
1511                                     void *cookie)
1512 {
1513         cdev->ll2->cbs = ops;
1514         cdev->ll2->cb_cookie = cookie;
1515 }
1516
1517 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
1518 {
1519         struct qed_ll2_info ll2_info;
1520         struct qed_ll2_buffer *buffer;
1521         enum qed_ll2_conn_type conn_type;
1522         struct qed_ptt *p_ptt;
1523         int rc, i;
1524
1525         /* Initialize LL2 locks & lists */
1526         INIT_LIST_HEAD(&cdev->ll2->list);
1527         spin_lock_init(&cdev->ll2->lock);
1528         cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
1529                              L1_CACHE_BYTES + params->mtu;
1530         cdev->ll2->frags_mapped = params->frags_mapped;
1531
1532         /*Allocate memory for LL2 */
1533         DP_INFO(cdev, "Allocating LL2 buffers of size %08x bytes\n",
1534                 cdev->ll2->rx_size);
1535         for (i = 0; i < QED_LL2_RX_SIZE; i++) {
1536                 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
1537                 if (!buffer) {
1538                         DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
1539                         goto fail;
1540                 }
1541
1542                 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
1543                                           &buffer->phys_addr);
1544                 if (rc) {
1545                         kfree(buffer);
1546                         goto fail;
1547                 }
1548
1549                 list_add_tail(&buffer->list, &cdev->ll2->list);
1550         }
1551
1552         switch (QED_LEADING_HWFN(cdev)->hw_info.personality) {
1553         case QED_PCI_ISCSI:
1554                 conn_type = QED_LL2_TYPE_ISCSI;
1555                 break;
1556         case QED_PCI_ETH_ROCE:
1557                 conn_type = QED_LL2_TYPE_ROCE;
1558                 break;
1559         default:
1560                 conn_type = QED_LL2_TYPE_TEST;
1561         }
1562
1563         /* Prepare the temporary ll2 information */
1564         memset(&ll2_info, 0, sizeof(ll2_info));
1565         ll2_info.conn_type = conn_type;
1566         ll2_info.mtu = params->mtu;
1567         ll2_info.rx_drop_ttl0_flg = params->drop_ttl0_packets;
1568         ll2_info.rx_vlan_removal_en = params->rx_vlan_stripping;
1569         ll2_info.tx_tc = 0;
1570         ll2_info.tx_dest = CORE_TX_DEST_NW;
1571         ll2_info.gsi_enable = 1;
1572
1573         rc = qed_ll2_acquire_connection(QED_LEADING_HWFN(cdev), &ll2_info,
1574                                         QED_LL2_RX_SIZE, QED_LL2_TX_SIZE,
1575                                         &cdev->ll2->handle);
1576         if (rc) {
1577                 DP_INFO(cdev, "Failed to acquire LL2 connection\n");
1578                 goto fail;
1579         }
1580
1581         rc = qed_ll2_establish_connection(QED_LEADING_HWFN(cdev),
1582                                           cdev->ll2->handle);
1583         if (rc) {
1584                 DP_INFO(cdev, "Failed to establish LL2 connection\n");
1585                 goto release_fail;
1586         }
1587
1588         /* Post all Rx buffers to FW */
1589         spin_lock_bh(&cdev->ll2->lock);
1590         list_for_each_entry(buffer, &cdev->ll2->list, list) {
1591                 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev),
1592                                             cdev->ll2->handle,
1593                                             buffer->phys_addr, 0, buffer, 1);
1594                 if (rc) {
1595                         DP_INFO(cdev,
1596                                 "Failed to post an Rx buffer; Deleting it\n");
1597                         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
1598                                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
1599                         kfree(buffer->data);
1600                         list_del(&buffer->list);
1601                         kfree(buffer);
1602                 } else {
1603                         cdev->ll2->rx_cnt++;
1604                 }
1605         }
1606         spin_unlock_bh(&cdev->ll2->lock);
1607
1608         if (!cdev->ll2->rx_cnt) {
1609                 DP_INFO(cdev, "Failed passing even a single Rx buffer\n");
1610                 goto release_terminate;
1611         }
1612
1613         if (!is_valid_ether_addr(params->ll2_mac_address)) {
1614                 DP_INFO(cdev, "Invalid Ethernet address\n");
1615                 goto release_terminate;
1616         }
1617
1618         p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
1619         if (!p_ptt) {
1620                 DP_INFO(cdev, "Failed to acquire PTT\n");
1621                 goto release_terminate;
1622         }
1623
1624         rc = qed_llh_add_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
1625                                     params->ll2_mac_address);
1626         qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
1627         if (rc) {
1628                 DP_ERR(cdev, "Failed to allocate LLH filter\n");
1629                 goto release_terminate_all;
1630         }
1631
1632         ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
1633
1634         return 0;
1635
1636 release_terminate_all:
1637
1638 release_terminate:
1639         qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
1640 release_fail:
1641         qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
1642 fail:
1643         qed_ll2_kill_buffers(cdev);
1644         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
1645         return -EINVAL;
1646 }
1647
1648 static int qed_ll2_stop(struct qed_dev *cdev)
1649 {
1650         struct qed_ptt *p_ptt;
1651         int rc;
1652
1653         if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
1654                 return 0;
1655
1656         p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
1657         if (!p_ptt) {
1658                 DP_INFO(cdev, "Failed to acquire PTT\n");
1659                 goto fail;
1660         }
1661
1662         qed_llh_remove_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
1663                                   cdev->ll2_mac_address);
1664         qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
1665         eth_zero_addr(cdev->ll2_mac_address);
1666
1667         rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev),
1668                                           cdev->ll2->handle);
1669         if (rc)
1670                 DP_INFO(cdev, "Failed to terminate LL2 connection\n");
1671
1672         qed_ll2_kill_buffers(cdev);
1673
1674         qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
1675         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
1676
1677         return rc;
1678 fail:
1679         return -EINVAL;
1680 }
1681
1682 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb)
1683 {
1684         const skb_frag_t *frag;
1685         int rc = -EINVAL, i;
1686         dma_addr_t mapping;
1687         u16 vlan = 0;
1688         u8 flags = 0;
1689
1690         if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
1691                 DP_INFO(cdev, "Cannot transmit a checksumed packet\n");
1692                 return -EINVAL;
1693         }
1694
1695         if (1 + skb_shinfo(skb)->nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) {
1696                 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
1697                        1 + skb_shinfo(skb)->nr_frags);
1698                 return -EINVAL;
1699         }
1700
1701         mapping = dma_map_single(&cdev->pdev->dev, skb->data,
1702                                  skb->len, DMA_TO_DEVICE);
1703         if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
1704                 DP_NOTICE(cdev, "SKB mapping failed\n");
1705                 return -EINVAL;
1706         }
1707
1708         /* Request HW to calculate IP csum */
1709         if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
1710               ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
1711                 flags |= BIT(CORE_TX_BD_FLAGS_IP_CSUM_SHIFT);
1712
1713         if (skb_vlan_tag_present(skb)) {
1714                 vlan = skb_vlan_tag_get(skb);
1715                 flags |= BIT(CORE_TX_BD_FLAGS_VLAN_INSERTION_SHIFT);
1716         }
1717
1718         rc = qed_ll2_prepare_tx_packet(QED_LEADING_HWFN(cdev),
1719                                        cdev->ll2->handle,
1720                                        1 + skb_shinfo(skb)->nr_frags,
1721                                        vlan, flags, 0, 0 /* RoCE FLAVOR */,
1722                                        mapping, skb->len, skb, 1);
1723         if (rc)
1724                 goto err;
1725
1726         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1727                 frag = &skb_shinfo(skb)->frags[i];
1728                 if (!cdev->ll2->frags_mapped) {
1729                         mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0,
1730                                                    skb_frag_size(frag),
1731                                                    DMA_TO_DEVICE);
1732
1733                         if (unlikely(dma_mapping_error(&cdev->pdev->dev,
1734                                                        mapping))) {
1735                                 DP_NOTICE(cdev,
1736                                           "Unable to map frag - dropping packet\n");
1737                                 goto err;
1738                         }
1739                 } else {
1740                         mapping = page_to_phys(skb_frag_page(frag)) |
1741                             frag->page_offset;
1742                 }
1743
1744                 rc = qed_ll2_set_fragment_of_tx_packet(QED_LEADING_HWFN(cdev),
1745                                                        cdev->ll2->handle,
1746                                                        mapping,
1747                                                        skb_frag_size(frag));
1748
1749                 /* if failed not much to do here, partial packet has been posted
1750                  * we can't free memory, will need to wait for completion.
1751                  */
1752                 if (rc)
1753                         goto err2;
1754         }
1755
1756         return 0;
1757
1758 err:
1759         dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE);
1760
1761 err2:
1762         return rc;
1763 }
1764
1765 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats)
1766 {
1767         if (!cdev->ll2)
1768                 return -EINVAL;
1769
1770         return qed_ll2_get_stats(QED_LEADING_HWFN(cdev),
1771                                  cdev->ll2->handle, stats);
1772 }
1773
1774 const struct qed_ll2_ops qed_ll2_ops_pass = {
1775         .start = &qed_ll2_start,
1776         .stop = &qed_ll2_stop,
1777         .start_xmit = &qed_ll2_start_xmit,
1778         .register_cb_ops = &qed_ll2_register_cb_ops,
1779         .get_stats = &qed_ll2_stats,
1780 };
1781
1782 int qed_ll2_alloc_if(struct qed_dev *cdev)
1783 {
1784         cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL);
1785         return cdev->ll2 ? 0 : -ENOMEM;
1786 }
1787
1788 void qed_ll2_dealloc_if(struct qed_dev *cdev)
1789 {
1790         kfree(cdev->ll2);
1791         cdev->ll2 = NULL;
1792 }