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 #include "qed_roce.h"
  42
  43 #define QED_LL2_RX_REGISTERED(ll2)      ((ll2)->rx_queue.b_cb_registred)
  44 #define QED_LL2_TX_REGISTERED(ll2)      ((ll2)->tx_queue.b_cb_registred)
  45
  46 #define QED_LL2_TX_SIZE (256)
  47 #define QED_LL2_RX_SIZE (4096)
  48
  49 struct qed_cb_ll2_info {
  50         int rx_cnt;
  51         u32 rx_size;
  52         u8 handle;
  53         bool frags_mapped;
  54
  55         /* Lock protecting LL2 buffer lists in sleepless context */
  56         spinlock_t lock;
  57         struct list_head list;
  58
  59         const struct qed_ll2_cb_ops *cbs;
  60         void *cb_cookie;
  61 };
  62
  63 struct qed_ll2_buffer {
  64         struct list_head list;
  65         void *data;
  66         dma_addr_t phys_addr;
  67 };
  68
  69 static void qed_ll2b_complete_tx_packet(struct qed_hwfn *p_hwfn,
  70                                         u8 connection_handle,
  71                                         void *cookie,
  72                                         dma_addr_t first_frag_addr,
  73                                         bool b_last_fragment,
  74                                         bool b_last_packet)
  75 {
  76         struct qed_dev *cdev = p_hwfn->cdev;
  77         struct sk_buff *skb = cookie;
  78
  79         /* All we need to do is release the mapping */
  80         dma_unmap_single(&p_hwfn->cdev->pdev->dev, first_frag_addr,
  81                          skb_headlen(skb), DMA_TO_DEVICE);
  82
  83         if (cdev->ll2->cbs && cdev->ll2->cbs->tx_cb)
  84                 cdev->ll2->cbs->tx_cb(cdev->ll2->cb_cookie, skb,
  85                                       b_last_fragment);
  86
  87         if (cdev->ll2->frags_mapped)
  88                 /* Case where mapped frags were received, need to
  89                  * free skb with nr_frags marked as 0
  90                  */
  91                 skb_shinfo(skb)->nr_frags = 0;
  92
  93         dev_kfree_skb_any(skb);
  94 }
  95
  96 static int qed_ll2_alloc_buffer(struct qed_dev *cdev,
  97                                 u8 **data, dma_addr_t *phys_addr)
  98 {
  99         *data = kmalloc(cdev->ll2->rx_size, GFP_ATOMIC);
 100         if (!(*data)) {
 101                 DP_INFO(cdev, "Failed to allocate LL2 buffer data\n");
 102                 return -ENOMEM;
 103         }
 104
 105         *phys_addr = dma_map_single(&cdev->pdev->dev,
 106                                     ((*data) + NET_SKB_PAD),
 107                                     cdev->ll2->rx_size, DMA_FROM_DEVICE);
 108         if (dma_mapping_error(&cdev->pdev->dev, *phys_addr)) {
 109                 DP_INFO(cdev, "Failed to map LL2 buffer data\n");
 110                 kfree((*data));
 111                 return -ENOMEM;
 112         }
 113
 114         return 0;
 115 }
 116
 117 static int qed_ll2_dealloc_buffer(struct qed_dev *cdev,
 118                                  struct qed_ll2_buffer *buffer)
 119 {
 120         spin_lock_bh(&cdev->ll2->lock);
 121
 122         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
 123                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
 124         kfree(buffer->data);
 125         list_del(&buffer->list);
 126
 127         cdev->ll2->rx_cnt--;
 128         if (!cdev->ll2->rx_cnt)
 129                 DP_INFO(cdev, "All LL2 entries were removed\n");
 130
 131         spin_unlock_bh(&cdev->ll2->lock);
 132
 133         return 0;
 134 }
 135
 136 static void qed_ll2_kill_buffers(struct qed_dev *cdev)
 137 {
 138         struct qed_ll2_buffer *buffer, *tmp_buffer;
 139
 140         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list)
 141                 qed_ll2_dealloc_buffer(cdev, buffer);
 142 }
 143
 144 static void qed_ll2b_complete_rx_packet(struct qed_hwfn *p_hwfn,
 145                                         u8 connection_handle,
 146                                         struct qed_ll2_rx_packet *p_pkt,
 147                                         struct core_rx_fast_path_cqe *p_cqe,
 148                                         bool b_last_packet)
 149 {
 150         u16 packet_length = le16_to_cpu(p_cqe->packet_length);
 151         struct qed_ll2_buffer *buffer = p_pkt->cookie;
 152         struct qed_dev *cdev = p_hwfn->cdev;
 153         u16 vlan = le16_to_cpu(p_cqe->vlan);
 154         u32 opaque_data_0, opaque_data_1;
 155         u8 pad = p_cqe->placement_offset;
 156         dma_addr_t new_phys_addr;
 157         struct sk_buff *skb;
 158         bool reuse = false;
 159         int rc = -EINVAL;
 160         u8 *new_data;
 161
 162         opaque_data_0 = le32_to_cpu(p_cqe->opaque_data.data[0]);
 163         opaque_data_1 = le32_to_cpu(p_cqe->opaque_data.data[1]);
 164
 165         DP_VERBOSE(p_hwfn,
 166                    (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA),
 167                    "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",
 168                    (u64)p_pkt->rx_buf_addr, pad, packet_length,
 169                    le16_to_cpu(p_cqe->parse_flags.flags), vlan,
 170                    opaque_data_0, opaque_data_1);
 171
 172         if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) {
 173                 print_hex_dump(KERN_INFO, "",
 174                                DUMP_PREFIX_OFFSET, 16, 1,
 175                                buffer->data, packet_length, false);
 176         }
 177
 178         /* Determine if data is valid */
 179         if (packet_length < ETH_HLEN)
 180                 reuse = true;
 181
 182         /* Allocate a replacement for buffer; Reuse upon failure */
 183         if (!reuse)
 184                 rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data,
 185                                           &new_phys_addr);
 186
 187         /* If need to reuse or there's no replacement buffer, repost this */
 188         if (rc)
 189                 goto out_post;
 190
 191         skb = build_skb(buffer->data, 0);
 192         if (!skb) {
 193                 rc = -ENOMEM;
 194                 goto out_post;
 195         }
 196
 197         pad += NET_SKB_PAD;
 198         skb_reserve(skb, pad);
 199         skb_put(skb, packet_length);
 200         skb_checksum_none_assert(skb);
 201
 202         /* Get parital ethernet information instead of eth_type_trans(),
 203          * Since we don't have an associated net_device.
 204          */
 205         skb_reset_mac_header(skb);
 206         skb->protocol = eth_hdr(skb)->h_proto;
 207
 208         /* Pass SKB onward */
 209         if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) {
 210                 if (vlan)
 211                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
 212                 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb,
 213                                       opaque_data_0, opaque_data_1);
 214         }
 215
 216         /* Update Buffer information and update FW producer */
 217         buffer->data = new_data;
 218         buffer->phys_addr = new_phys_addr;
 219
 220 out_post:
 221         rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), cdev->ll2->handle,
 222                                     buffer->phys_addr, 0,  buffer, 1);
 223
 224         if (rc)
 225                 qed_ll2_dealloc_buffer(cdev, buffer);
 226 }
 227
 228 static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 229                                                     u8 connection_handle,
 230                                                     bool b_lock,
 231                                                     bool b_only_active)
 232 {
 233         struct qed_ll2_info *p_ll2_conn, *p_ret = NULL;
 234
 235         if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS)
 236                 return NULL;
 237
 238         if (!p_hwfn->p_ll2_info)
 239                 return NULL;
 240
 241         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
 242
 243         if (b_only_active) {
 244                 if (b_lock)
 245                         mutex_lock(&p_ll2_conn->mutex);
 246                 if (p_ll2_conn->b_active)
 247                         p_ret = p_ll2_conn;
 248                 if (b_lock)
 249                         mutex_unlock(&p_ll2_conn->mutex);
 250         } else {
 251                 p_ret = p_ll2_conn;
 252         }
 253
 254         return p_ret;
 255 }
 256
 257 static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 258                                                   u8 connection_handle)
 259 {
 260         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true);
 261 }
 262
 263 static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn,
 264                                                        u8 connection_handle)
 265 {
 266         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true);
 267 }
 268
 269 static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn
 270                                                            *p_hwfn,
 271                                                            u8 connection_handle)
 272 {
 273         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false);
 274 }
 275
 276 static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 277 {
 278         bool b_last_packet = false, b_last_frag = false;
 279         struct qed_ll2_tx_packet *p_pkt = NULL;
 280         struct qed_ll2_info *p_ll2_conn;
 281         struct qed_ll2_tx_queue *p_tx;
 282         dma_addr_t tx_frag;
 283
 284         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 285         if (!p_ll2_conn)
 286                 return;
 287
 288         p_tx = &p_ll2_conn->tx_queue;
 289
 290         while (!list_empty(&p_tx->active_descq)) {
 291                 p_pkt = list_first_entry(&p_tx->active_descq,
 292                                          struct qed_ll2_tx_packet, list_entry);
 293                 if (!p_pkt)
 294                         break;
 295
 296                 list_del(&p_pkt->list_entry);
 297                 b_last_packet = list_empty(&p_tx->active_descq);
 298                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 299                 p_tx->cur_completing_packet = *p_pkt;
 300                 p_tx->cur_completing_bd_idx = 1;
 301                 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 302                 tx_frag = p_pkt->bds_set[0].tx_frag;
 303                 if (p_ll2_conn->gsi_enable)
 304                         qed_ll2b_release_tx_gsi_packet(p_hwfn,
 305                                                        p_ll2_conn->my_id,
 306                                                        p_pkt->cookie,
 307                                                        tx_frag,
 308                                                        b_last_frag,
 309                                                        b_last_packet);
 310                 else
 311                         qed_ll2b_complete_tx_packet(p_hwfn,
 312                                                     p_ll2_conn->my_id,
 313                                                     p_pkt->cookie,
 314                                                     tx_frag,
 315                                                     b_last_frag,
 316                                                     b_last_packet);
 317
 318         }
 319 }
 320
 321 static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 322 {
 323         struct qed_ll2_info *p_ll2_conn = p_cookie;
 324         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 325         u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0;
 326         struct qed_ll2_tx_packet *p_pkt;
 327         bool b_last_frag = false;
 328         unsigned long flags;
 329         dma_addr_t tx_frag;
 330         int rc = -EINVAL;
 331
 332         spin_lock_irqsave(&p_tx->lock, flags);
 333         if (p_tx->b_completing_packet) {
 334                 rc = -EBUSY;
 335                 goto out;
 336         }
 337
 338         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 339         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 340         while (num_bds) {
 341                 if (list_empty(&p_tx->active_descq))
 342                         goto out;
 343
 344                 p_pkt = list_first_entry(&p_tx->active_descq,
 345                                          struct qed_ll2_tx_packet, list_entry);
 346                 if (!p_pkt)
 347                         goto out;
 348
 349                 p_tx->b_completing_packet = true;
 350                 p_tx->cur_completing_packet = *p_pkt;
 351                 num_bds_in_packet = p_pkt->bd_used;
 352                 list_del(&p_pkt->list_entry);
 353
 354                 if (num_bds < num_bds_in_packet) {
 355                         DP_NOTICE(p_hwfn,
 356                                   "Rest of BDs does not cover whole packet\n");
 357                         goto out;
 358                 }
 359
 360                 num_bds -= num_bds_in_packet;
 361                 p_tx->bds_idx += num_bds_in_packet;
 362                 while (num_bds_in_packet--)
 363                         qed_chain_consume(&p_tx->txq_chain);
 364
 365                 p_tx->cur_completing_bd_idx = 1;
 366                 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 367                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 368
 369                 spin_unlock_irqrestore(&p_tx->lock, flags);
 370                 tx_frag = p_pkt->bds_set[0].tx_frag;
 371                 if (p_ll2_conn->gsi_enable)
 372                         qed_ll2b_complete_tx_gsi_packet(p_hwfn,
 373                                                         p_ll2_conn->my_id,
 374                                                         p_pkt->cookie,
 375                                                         tx_frag,
 376                                                         b_last_frag, !num_bds);
 377                 else
 378                         qed_ll2b_complete_tx_packet(p_hwfn,
 379                                                     p_ll2_conn->my_id,
 380                                                     p_pkt->cookie,
 381                                                     tx_frag,
 382                                                     b_last_frag, !num_bds);
 383                 spin_lock_irqsave(&p_tx->lock, flags);
 384         }
 385
 386         p_tx->b_completing_packet = false;
 387         rc = 0;
 388 out:
 389         spin_unlock_irqrestore(&p_tx->lock, flags);
 390         return rc;
 391 }
 392
 393 static int
 394 qed_ll2_rxq_completion_gsi(struct qed_hwfn *p_hwfn,
 395                            struct qed_ll2_info *p_ll2_info,
 396                            union core_rx_cqe_union *p_cqe,
 397                            unsigned long lock_flags, bool b_last_cqe)
 398 {
 399         struct qed_ll2_rx_queue *p_rx = &p_ll2_info->rx_queue;
 400         struct qed_ll2_rx_packet *p_pkt = NULL;
 401         u16 packet_length, parse_flags, vlan;
 402         u32 src_mac_addrhi;
 403         u16 src_mac_addrlo;
 404
 405         if (!list_empty(&p_rx->active_descq))
 406                 p_pkt = list_first_entry(&p_rx->active_descq,
 407                                          struct qed_ll2_rx_packet, list_entry);
 408         if (!p_pkt) {
 409                 DP_NOTICE(p_hwfn,
 410                           "GSI Rx completion but active_descq is empty\n");
 411                 return -EIO;
 412         }
 413
 414         list_del(&p_pkt->list_entry);
 415         parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags);
 416         packet_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length);
 417         vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan);
 418         src_mac_addrhi = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi);
 419         src_mac_addrlo = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo);
 420         if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)
 421                 DP_NOTICE(p_hwfn,
 422                           "Mismatch between active_descq and the LL2 Rx chain\n");
 423         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 424
 425         spin_unlock_irqrestore(&p_rx->lock, lock_flags);
 426         qed_ll2b_complete_rx_gsi_packet(p_hwfn,
 427                                         p_ll2_info->my_id,
 428                                         p_pkt->cookie,
 429                                         p_pkt->rx_buf_addr,
 430                                         packet_length,
 431                                         p_cqe->rx_cqe_gsi.data_length_error,
 432                                         parse_flags,
 433                                         vlan,
 434                                         src_mac_addrhi,
 435                                         src_mac_addrlo, b_last_cqe);
 436         spin_lock_irqsave(&p_rx->lock, lock_flags);
 437
 438         return 0;
 439 }
 440
 441 static int qed_ll2_rxq_completion_reg(struct qed_hwfn *p_hwfn,
 442                                       struct qed_ll2_info *p_ll2_conn,
 443                                       union core_rx_cqe_union *p_cqe,
 444                                       unsigned long lock_flags,
 445                                       bool b_last_cqe)
 446 {
 447         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 448         struct qed_ll2_rx_packet *p_pkt = NULL;
 449
 450         if (!list_empty(&p_rx->active_descq))
 451                 p_pkt = list_first_entry(&p_rx->active_descq,
 452                                          struct qed_ll2_rx_packet, list_entry);
 453         if (!p_pkt) {
 454                 DP_NOTICE(p_hwfn,
 455                           "LL2 Rx completion but active_descq is empty\n");
 456                 return -EIO;
 457         }
 458         list_del(&p_pkt->list_entry);
 459
 460         if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)
 461                 DP_NOTICE(p_hwfn,
 462                           "Mismatch between active_descq and the LL2 Rx chain\n");
 463         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 464
 465         spin_unlock_irqrestore(&p_rx->lock, lock_flags);
 466         qed_ll2b_complete_rx_packet(p_hwfn, p_ll2_conn->my_id,
 467                                     p_pkt, &p_cqe->rx_cqe_fp, b_last_cqe);
 468         spin_lock_irqsave(&p_rx->lock, lock_flags);
 469
 470         return 0;
 471 }
 472
 473 static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie)
 474 {
 475         struct qed_ll2_info *p_ll2_conn = cookie;
 476         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 477         union core_rx_cqe_union *cqe = NULL;
 478         u16 cq_new_idx = 0, cq_old_idx = 0;
 479         unsigned long flags = 0;
 480         int rc = 0;
 481
 482         spin_lock_irqsave(&p_rx->lock, flags);
 483         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 484         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 485
 486         while (cq_new_idx != cq_old_idx) {
 487                 bool b_last_cqe = (cq_new_idx == cq_old_idx);
 488
 489                 cqe = qed_chain_consume(&p_rx->rcq_chain);
 490                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 491
 492                 DP_VERBOSE(p_hwfn,
 493                            QED_MSG_LL2,
 494                            "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n",
 495                            cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type);
 496
 497                 switch (cqe->rx_cqe_sp.type) {
 498                 case CORE_RX_CQE_TYPE_SLOW_PATH:
 499                         DP_NOTICE(p_hwfn, "LL2 - unexpected Rx CQE slowpath\n");
 500                         rc = -EINVAL;
 501                         break;
 502                 case CORE_RX_CQE_TYPE_GSI_OFFLOAD:
 503                         rc = qed_ll2_rxq_completion_gsi(p_hwfn, p_ll2_conn,
 504                                                         cqe, flags, b_last_cqe);
 505                         break;
 506                 case CORE_RX_CQE_TYPE_REGULAR:
 507                         rc = qed_ll2_rxq_completion_reg(p_hwfn, p_ll2_conn,
 508                                                         cqe, flags, b_last_cqe);
 509                         break;
 510                 default:
 511                         rc = -EIO;
 512                 }
 513         }
 514
 515         spin_unlock_irqrestore(&p_rx->lock, flags);
 516         return rc;
 517 }
 518
 519 static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 520 {
 521         struct qed_ll2_info *p_ll2_conn = NULL;
 522         struct qed_ll2_rx_packet *p_pkt = NULL;
 523         struct qed_ll2_rx_queue *p_rx;
 524
 525         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 526         if (!p_ll2_conn)
 527                 return;
 528
 529         p_rx = &p_ll2_conn->rx_queue;
 530
 531         while (!list_empty(&p_rx->active_descq)) {
 532                 dma_addr_t rx_buf_addr;
 533                 void *cookie;
 534                 bool b_last;
 535
 536                 p_pkt = list_first_entry(&p_rx->active_descq,
 537                                          struct qed_ll2_rx_packet, list_entry);
 538                 if (!p_pkt)
 539                         break;
 540
 541                 list_move_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_move_tail(&p_posting_packet->list_entry,
 996                                &p_rx->active_descq);
 997                 b_notify_fw = true;
 998         }
 999
1000         /* This handles the supplied packet [if there is one] */
1001         if (p_curp) {
1002                 list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
1003                 b_notify_fw = true;
1004         }
1005
1006         if (!b_notify_fw)
1007                 return;
1008
1009         bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
1010         cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
1011         rx_prod.bd_prod = cpu_to_le16(bd_prod);
1012         rx_prod.cqe_prod = cpu_to_le16(cq_prod);
1013         DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
1014 }
1015
1016 int qed_ll2_post_rx_buffer(struct qed_hwfn *p_hwfn,
1017                            u8 connection_handle,
1018                            dma_addr_t addr,
1019                            u16 buf_len, void *cookie, u8 notify_fw)
1020 {
1021         struct core_rx_bd_with_buff_len *p_curb = NULL;
1022         struct qed_ll2_rx_packet *p_curp = NULL;
1023         struct qed_ll2_info *p_ll2_conn;
1024         struct qed_ll2_rx_queue *p_rx;
1025         unsigned long flags;
1026         void *p_data;
1027         int rc = 0;
1028
1029         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1030         if (!p_ll2_conn)
1031                 return -EINVAL;
1032         p_rx = &p_ll2_conn->rx_queue;
1033
1034         spin_lock_irqsave(&p_rx->lock, flags);
1035         if (!list_empty(&p_rx->free_descq))
1036                 p_curp = list_first_entry(&p_rx->free_descq,
1037                                           struct qed_ll2_rx_packet, list_entry);
1038         if (p_curp) {
1039                 if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
1040                     qed_chain_get_elem_left(&p_rx->rcq_chain)) {
1041                         p_data = qed_chain_produce(&p_rx->rxq_chain);
1042                         p_curb = (struct core_rx_bd_with_buff_len *)p_data;
1043                         qed_chain_produce(&p_rx->rcq_chain);
1044                 }
1045         }
1046
1047         /* If we're lacking entires, let's try to flush buffers to FW */
1048         if (!p_curp || !p_curb) {
1049                 rc = -EBUSY;
1050                 p_curp = NULL;
1051                 goto out_notify;
1052         }
1053
1054         /* We have an Rx packet we can fill */
1055         DMA_REGPAIR_LE(p_curb->addr, addr);
1056         p_curb->buff_length = cpu_to_le16(buf_len);
1057         p_curp->rx_buf_addr = addr;
1058         p_curp->cookie = cookie;
1059         p_curp->rxq_bd = p_curb;
1060         p_curp->buf_length = buf_len;
1061         list_del(&p_curp->list_entry);
1062
1063         /* Check if we only want to enqueue this packet without informing FW */
1064         if (!notify_fw) {
1065                 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
1066                 goto out;
1067         }
1068
1069 out_notify:
1070         qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
1071 out:
1072         spin_unlock_irqrestore(&p_rx->lock, flags);
1073         return rc;
1074 }
1075
1076 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
1077                                           struct qed_ll2_tx_queue *p_tx,
1078                                           struct qed_ll2_tx_packet *p_curp,
1079                                           u8 num_of_bds,
1080                                           dma_addr_t first_frag,
1081                                           u16 first_frag_len, void *p_cookie,
1082                                           u8 notify_fw)
1083 {
1084         list_del(&p_curp->list_entry);
1085         p_curp->cookie = p_cookie;
1086         p_curp->bd_used = num_of_bds;
1087         p_curp->notify_fw = notify_fw;
1088         p_tx->cur_send_packet = p_curp;
1089         p_tx->cur_send_frag_num = 0;
1090
1091         p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = first_frag;
1092         p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = first_frag_len;
1093         p_tx->cur_send_frag_num++;
1094 }
1095
1096 static void qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
1097                                              struct qed_ll2_info *p_ll2,
1098                                              struct qed_ll2_tx_packet *p_curp,
1099                                              u8 num_of_bds,
1100                                              enum core_tx_dest tx_dest,
1101                                              u16 vlan,
1102                                              u8 bd_flags,
1103                                              u16 l4_hdr_offset_w,
1104                                              enum core_roce_flavor_type type,
1105                                              dma_addr_t first_frag,
1106                                              u16 first_frag_len)
1107 {
1108         struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
1109         u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
1110         struct core_tx_bd *start_bd = NULL;
1111         u16 frag_idx;
1112
1113         start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1114         start_bd->nw_vlan_or_lb_echo = cpu_to_le16(vlan);
1115         SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W,
1116                   cpu_to_le16(l4_hdr_offset_w));
1117         SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest);
1118         start_bd->bd_flags.as_bitfield = bd_flags;
1119         start_bd->bd_flags.as_bitfield |= CORE_TX_BD_FLAGS_START_BD_MASK <<
1120             CORE_TX_BD_FLAGS_START_BD_SHIFT;
1121         SET_FIELD(start_bd->bitfield0, CORE_TX_BD_NBDS, num_of_bds);
1122         DMA_REGPAIR_LE(start_bd->addr, first_frag);
1123         start_bd->nbytes = cpu_to_le16(first_frag_len);
1124
1125         DP_VERBOSE(p_hwfn,
1126                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1127                    "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",
1128                    p_ll2->queue_id,
1129                    p_ll2->cid,
1130                    p_ll2->conn_type,
1131                    prod_idx,
1132                    first_frag_len,
1133                    num_of_bds,
1134                    le32_to_cpu(start_bd->addr.hi),
1135                    le32_to_cpu(start_bd->addr.lo));
1136
1137         if (p_ll2->tx_queue.cur_send_frag_num == num_of_bds)
1138                 return;
1139
1140         /* Need to provide the packet with additional BDs for frags */
1141         for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
1142              frag_idx < num_of_bds; frag_idx++) {
1143                 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
1144
1145                 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1146                 (*p_bd)->bd_flags.as_bitfield = 0;
1147                 (*p_bd)->bitfield1 = 0;
1148                 (*p_bd)->bitfield0 = 0;
1149                 p_curp->bds_set[frag_idx].tx_frag = 0;
1150                 p_curp->bds_set[frag_idx].frag_len = 0;
1151         }
1152 }
1153
1154 /* This should be called while the Txq spinlock is being held */
1155 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
1156                                      struct qed_ll2_info *p_ll2_conn)
1157 {
1158         bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
1159         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1160         struct qed_ll2_tx_packet *p_pkt = NULL;
1161         struct core_db_data db_msg = { 0, 0, 0 };
1162         u16 bd_prod;
1163
1164         /* If there are missing BDs, don't do anything now */
1165         if (p_ll2_conn->tx_queue.cur_send_frag_num !=
1166             p_ll2_conn->tx_queue.cur_send_packet->bd_used)
1167                 return;
1168
1169         /* Push the current packet to the list and clean after it */
1170         list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
1171                       &p_ll2_conn->tx_queue.sending_descq);
1172         p_ll2_conn->tx_queue.cur_send_packet = NULL;
1173         p_ll2_conn->tx_queue.cur_send_frag_num = 0;
1174
1175         /* Notify FW of packet only if requested to */
1176         if (!b_notify)
1177                 return;
1178
1179         bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
1180
1181         while (!list_empty(&p_tx->sending_descq)) {
1182                 p_pkt = list_first_entry(&p_tx->sending_descq,
1183                                          struct qed_ll2_tx_packet, list_entry);
1184                 if (!p_pkt)
1185                         break;
1186
1187                 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq);
1188         }
1189
1190         SET_FIELD(db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
1191         SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
1192         SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
1193                   DQ_XCM_CORE_TX_BD_PROD_CMD);
1194         db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
1195         db_msg.spq_prod = cpu_to_le16(bd_prod);
1196
1197         /* Make sure the BDs data is updated before ringing the doorbell */
1198         wmb();
1199
1200         DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&db_msg));
1201
1202         DP_VERBOSE(p_hwfn,
1203                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1204                    "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
1205                    p_ll2_conn->queue_id,
1206                    p_ll2_conn->cid, p_ll2_conn->conn_type, db_msg.spq_prod);
1207 }
1208
1209 int qed_ll2_prepare_tx_packet(struct qed_hwfn *p_hwfn,
1210                               u8 connection_handle,
1211                               u8 num_of_bds,
1212                               u16 vlan,
1213                               u8 bd_flags,
1214                               u16 l4_hdr_offset_w,
1215                               enum qed_ll2_roce_flavor_type qed_roce_flavor,
1216                               dma_addr_t first_frag,
1217                               u16 first_frag_len, void *cookie, u8 notify_fw)
1218 {
1219         struct qed_ll2_tx_packet *p_curp = NULL;
1220         struct qed_ll2_info *p_ll2_conn = NULL;
1221         enum core_roce_flavor_type roce_flavor;
1222         struct qed_ll2_tx_queue *p_tx;
1223         struct qed_chain *p_tx_chain;
1224         unsigned long flags;
1225         int rc = 0;
1226
1227         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1228         if (!p_ll2_conn)
1229                 return -EINVAL;
1230         p_tx = &p_ll2_conn->tx_queue;
1231         p_tx_chain = &p_tx->txq_chain;
1232
1233         if (num_of_bds > CORE_LL2_TX_MAX_BDS_PER_PACKET)
1234                 return -EIO;
1235
1236         spin_lock_irqsave(&p_tx->lock, flags);
1237         if (p_tx->cur_send_packet) {
1238                 rc = -EEXIST;
1239                 goto out;
1240         }
1241
1242         /* Get entry, but only if we have tx elements for it */
1243         if (!list_empty(&p_tx->free_descq))
1244                 p_curp = list_first_entry(&p_tx->free_descq,
1245                                           struct qed_ll2_tx_packet, list_entry);
1246         if (p_curp && qed_chain_get_elem_left(p_tx_chain) < num_of_bds)
1247                 p_curp = NULL;
1248
1249         if (!p_curp) {
1250                 rc = -EBUSY;
1251                 goto out;
1252         }
1253
1254         if (qed_roce_flavor == QED_LL2_ROCE) {
1255                 roce_flavor = CORE_ROCE;
1256         } else if (qed_roce_flavor == QED_LL2_RROCE) {
1257                 roce_flavor = CORE_RROCE;
1258         } else {
1259                 rc = -EINVAL;
1260                 goto out;
1261         }
1262
1263         /* Prepare packet and BD, and perhaps send a doorbell to FW */
1264         qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp,
1265                                       num_of_bds, first_frag,
1266                                       first_frag_len, cookie, notify_fw);
1267         qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp,
1268                                          num_of_bds, CORE_TX_DEST_NW,
1269                                          vlan, bd_flags, l4_hdr_offset_w,
1270                                          roce_flavor,
1271                                          first_frag, first_frag_len);
1272
1273         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1274
1275 out:
1276         spin_unlock_irqrestore(&p_tx->lock, flags);
1277         return rc;
1278 }
1279
1280 int qed_ll2_set_fragment_of_tx_packet(struct qed_hwfn *p_hwfn,
1281                                       u8 connection_handle,
1282                                       dma_addr_t addr, u16 nbytes)
1283 {
1284         struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
1285         struct qed_ll2_info *p_ll2_conn = NULL;
1286         u16 cur_send_frag_num = 0;
1287         struct core_tx_bd *p_bd;
1288         unsigned long flags;
1289
1290         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1291         if (!p_ll2_conn)
1292                 return -EINVAL;
1293
1294         if (!p_ll2_conn->tx_queue.cur_send_packet)
1295                 return -EINVAL;
1296
1297         p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
1298         cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
1299
1300         if (cur_send_frag_num >= p_cur_send_packet->bd_used)
1301                 return -EINVAL;
1302
1303         /* Fill the BD information, and possibly notify FW */
1304         p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
1305         DMA_REGPAIR_LE(p_bd->addr, addr);
1306         p_bd->nbytes = cpu_to_le16(nbytes);
1307         p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
1308         p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
1309
1310         p_ll2_conn->tx_queue.cur_send_frag_num++;
1311
1312         spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
1313         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1314         spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
1315
1316         return 0;
1317 }
1318
1319 int qed_ll2_terminate_connection(struct qed_hwfn *p_hwfn, u8 connection_handle)
1320 {
1321         struct qed_ll2_info *p_ll2_conn = NULL;
1322         int rc = -EINVAL;
1323
1324         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1325         if (!p_ll2_conn)
1326                 return -EINVAL;
1327
1328         /* Stop Tx & Rx of connection, if needed */
1329         if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
1330                 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
1331                 if (rc)
1332                         return rc;
1333                 qed_ll2_txq_flush(p_hwfn, connection_handle);
1334         }
1335
1336         if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
1337                 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
1338                 if (rc)
1339                         return rc;
1340                 qed_ll2_rxq_flush(p_hwfn, connection_handle);
1341         }
1342
1343         return rc;
1344 }
1345
1346 void qed_ll2_release_connection(struct qed_hwfn *p_hwfn, u8 connection_handle)
1347 {
1348         struct qed_ll2_info *p_ll2_conn = NULL;
1349
1350         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1351         if (!p_ll2_conn)
1352                 return;
1353
1354         if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
1355                 p_ll2_conn->rx_queue.b_cb_registred = false;
1356                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
1357         }
1358
1359         if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
1360                 p_ll2_conn->tx_queue.b_cb_registred = false;
1361                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
1362         }
1363
1364         kfree(p_ll2_conn->tx_queue.descq_array);
1365         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
1366
1367         kfree(p_ll2_conn->rx_queue.descq_array);
1368         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
1369         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
1370
1371         qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
1372
1373         mutex_lock(&p_ll2_conn->mutex);
1374         p_ll2_conn->b_active = false;
1375         mutex_unlock(&p_ll2_conn->mutex);
1376 }
1377
1378 struct qed_ll2_info *qed_ll2_alloc(struct qed_hwfn *p_hwfn)
1379 {
1380         struct qed_ll2_info *p_ll2_connections;
1381         u8 i;
1382
1383         /* Allocate LL2's set struct */
1384         p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
1385                                     sizeof(struct qed_ll2_info), GFP_KERNEL);
1386         if (!p_ll2_connections) {
1387                 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
1388                 return NULL;
1389         }
1390
1391         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
1392                 p_ll2_connections[i].my_id = i;
1393
1394         return p_ll2_connections;
1395 }
1396
1397 void qed_ll2_setup(struct qed_hwfn *p_hwfn,
1398                    struct qed_ll2_info *p_ll2_connections)
1399 {
1400         int i;
1401
1402         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
1403                 mutex_init(&p_ll2_connections[i].mutex);
1404 }
1405
1406 void qed_ll2_free(struct qed_hwfn *p_hwfn,
1407                   struct qed_ll2_info *p_ll2_connections)
1408 {
1409         kfree(p_ll2_connections);
1410 }
1411
1412 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,
1413                                 struct qed_ptt *p_ptt,
1414                                 struct qed_ll2_info *p_ll2_conn,
1415                                 struct qed_ll2_stats *p_stats)
1416 {
1417         struct core_ll2_tstorm_per_queue_stat tstats;
1418         u8 qid = p_ll2_conn->queue_id;
1419         u32 tstats_addr;
1420
1421         memset(&tstats, 0, sizeof(tstats));
1422         tstats_addr = BAR0_MAP_REG_TSDM_RAM +
1423                       CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
1424         qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
1425
1426         p_stats->packet_too_big_discard =
1427                         HILO_64_REGPAIR(tstats.packet_too_big_discard);
1428         p_stats->no_buff_discard = HILO_64_REGPAIR(tstats.no_buff_discard);
1429 }
1430
1431 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
1432                                 struct qed_ptt *p_ptt,
1433                                 struct qed_ll2_info *p_ll2_conn,
1434                                 struct qed_ll2_stats *p_stats)
1435 {
1436         struct core_ll2_ustorm_per_queue_stat ustats;
1437         u8 qid = p_ll2_conn->queue_id;
1438         u32 ustats_addr;
1439
1440         memset(&ustats, 0, sizeof(ustats));
1441         ustats_addr = BAR0_MAP_REG_USDM_RAM +
1442                       CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
1443         qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
1444
1445         p_stats->rcv_ucast_bytes = HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
1446         p_stats->rcv_mcast_bytes = HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
1447         p_stats->rcv_bcast_bytes = HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
1448         p_stats->rcv_ucast_pkts = HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
1449         p_stats->rcv_mcast_pkts = HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
1450         p_stats->rcv_bcast_pkts = HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
1451 }
1452
1453 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
1454                                 struct qed_ptt *p_ptt,
1455                                 struct qed_ll2_info *p_ll2_conn,
1456                                 struct qed_ll2_stats *p_stats)
1457 {
1458         struct core_ll2_pstorm_per_queue_stat pstats;
1459         u8 stats_id = p_ll2_conn->tx_stats_id;
1460         u32 pstats_addr;
1461
1462         memset(&pstats, 0, sizeof(pstats));
1463         pstats_addr = BAR0_MAP_REG_PSDM_RAM +
1464                       CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
1465         qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
1466
1467         p_stats->sent_ucast_bytes = HILO_64_REGPAIR(pstats.sent_ucast_bytes);
1468         p_stats->sent_mcast_bytes = HILO_64_REGPAIR(pstats.sent_mcast_bytes);
1469         p_stats->sent_bcast_bytes = HILO_64_REGPAIR(pstats.sent_bcast_bytes);
1470         p_stats->sent_ucast_pkts = HILO_64_REGPAIR(pstats.sent_ucast_pkts);
1471         p_stats->sent_mcast_pkts = HILO_64_REGPAIR(pstats.sent_mcast_pkts);
1472         p_stats->sent_bcast_pkts = HILO_64_REGPAIR(pstats.sent_bcast_pkts);
1473 }
1474
1475 int qed_ll2_get_stats(struct qed_hwfn *p_hwfn,
1476                       u8 connection_handle, struct qed_ll2_stats *p_stats)
1477 {
1478         struct qed_ll2_info *p_ll2_conn = NULL;
1479         struct qed_ptt *p_ptt;
1480
1481         memset(p_stats, 0, sizeof(*p_stats));
1482
1483         if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
1484             !p_hwfn->p_ll2_info)
1485                 return -EINVAL;
1486
1487         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
1488
1489         p_ptt = qed_ptt_acquire(p_hwfn);
1490         if (!p_ptt) {
1491                 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
1492                 return -EINVAL;
1493         }
1494
1495         _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
1496         _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
1497         if (p_ll2_conn->tx_stats_en)
1498                 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
1499
1500         qed_ptt_release(p_hwfn, p_ptt);
1501         return 0;
1502 }
1503
1504 static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
1505                                     const struct qed_ll2_cb_ops *ops,
1506                                     void *cookie)
1507 {
1508         cdev->ll2->cbs = ops;
1509         cdev->ll2->cb_cookie = cookie;
1510 }
1511
1512 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
1513 {
1514         struct qed_ll2_info ll2_info;
1515         struct qed_ll2_buffer *buffer, *tmp_buffer;
1516         enum qed_ll2_conn_type conn_type;
1517         struct qed_ptt *p_ptt;
1518         int rc, i;
1519
1520         /* Initialize LL2 locks & lists */
1521         INIT_LIST_HEAD(&cdev->ll2->list);
1522         spin_lock_init(&cdev->ll2->lock);
1523         cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
1524                              L1_CACHE_BYTES + params->mtu;
1525         cdev->ll2->frags_mapped = params->frags_mapped;
1526
1527         /*Allocate memory for LL2 */
1528         DP_INFO(cdev, "Allocating LL2 buffers of size %08x bytes\n",
1529                 cdev->ll2->rx_size);
1530         for (i = 0; i < QED_LL2_RX_SIZE; i++) {
1531                 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
1532                 if (!buffer) {
1533                         DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
1534                         goto fail;
1535                 }
1536
1537                 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
1538                                           &buffer->phys_addr);
1539                 if (rc) {
1540                         kfree(buffer);
1541                         goto fail;
1542                 }
1543
1544                 list_add_tail(&buffer->list, &cdev->ll2->list);
1545         }
1546
1547         switch (QED_LEADING_HWFN(cdev)->hw_info.personality) {
1548         case QED_PCI_ISCSI:
1549                 conn_type = QED_LL2_TYPE_ISCSI;
1550                 break;
1551         case QED_PCI_ETH_ROCE:
1552                 conn_type = QED_LL2_TYPE_ROCE;
1553                 break;
1554         default:
1555                 conn_type = QED_LL2_TYPE_TEST;
1556         }
1557
1558         /* Prepare the temporary ll2 information */
1559         memset(&ll2_info, 0, sizeof(ll2_info));
1560         ll2_info.conn_type = conn_type;
1561         ll2_info.mtu = params->mtu;
1562         ll2_info.rx_drop_ttl0_flg = params->drop_ttl0_packets;
1563         ll2_info.rx_vlan_removal_en = params->rx_vlan_stripping;
1564         ll2_info.tx_tc = 0;
1565         ll2_info.tx_dest = CORE_TX_DEST_NW;
1566         ll2_info.gsi_enable = 1;
1567
1568         rc = qed_ll2_acquire_connection(QED_LEADING_HWFN(cdev), &ll2_info,
1569                                         QED_LL2_RX_SIZE, QED_LL2_TX_SIZE,
1570                                         &cdev->ll2->handle);
1571         if (rc) {
1572                 DP_INFO(cdev, "Failed to acquire LL2 connection\n");
1573                 goto fail;
1574         }
1575
1576         rc = qed_ll2_establish_connection(QED_LEADING_HWFN(cdev),
1577                                           cdev->ll2->handle);
1578         if (rc) {
1579                 DP_INFO(cdev, "Failed to establish LL2 connection\n");
1580                 goto release_fail;
1581         }
1582
1583         /* Post all Rx buffers to FW */
1584         spin_lock_bh(&cdev->ll2->lock);
1585         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) {
1586                 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev),
1587                                             cdev->ll2->handle,
1588                                             buffer->phys_addr, 0, buffer, 1);
1589                 if (rc) {
1590                         DP_INFO(cdev,
1591                                 "Failed to post an Rx buffer; Deleting it\n");
1592                         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
1593                                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
1594                         kfree(buffer->data);
1595                         list_del(&buffer->list);
1596                         kfree(buffer);
1597                 } else {
1598                         cdev->ll2->rx_cnt++;
1599                 }
1600         }
1601         spin_unlock_bh(&cdev->ll2->lock);
1602
1603         if (!cdev->ll2->rx_cnt) {
1604                 DP_INFO(cdev, "Failed passing even a single Rx buffer\n");
1605                 goto release_terminate;
1606         }
1607
1608         if (!is_valid_ether_addr(params->ll2_mac_address)) {
1609                 DP_INFO(cdev, "Invalid Ethernet address\n");
1610                 goto release_terminate;
1611         }
1612
1613         p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
1614         if (!p_ptt) {
1615                 DP_INFO(cdev, "Failed to acquire PTT\n");
1616                 goto release_terminate;
1617         }
1618
1619         rc = qed_llh_add_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
1620                                     params->ll2_mac_address);
1621         qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
1622         if (rc) {
1623                 DP_ERR(cdev, "Failed to allocate LLH filter\n");
1624                 goto release_terminate_all;
1625         }
1626
1627         ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
1628
1629         return 0;
1630
1631 release_terminate_all:
1632
1633 release_terminate:
1634         qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
1635 release_fail:
1636         qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
1637 fail:
1638         qed_ll2_kill_buffers(cdev);
1639         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
1640         return -EINVAL;
1641 }
1642
1643 static int qed_ll2_stop(struct qed_dev *cdev)
1644 {
1645         struct qed_ptt *p_ptt;
1646         int rc;
1647
1648         if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
1649                 return 0;
1650
1651         p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
1652         if (!p_ptt) {
1653                 DP_INFO(cdev, "Failed to acquire PTT\n");
1654                 goto fail;
1655         }
1656
1657         qed_llh_remove_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
1658                                   cdev->ll2_mac_address);
1659         qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
1660         eth_zero_addr(cdev->ll2_mac_address);
1661
1662         rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev),
1663                                           cdev->ll2->handle);
1664         if (rc)
1665                 DP_INFO(cdev, "Failed to terminate LL2 connection\n");
1666
1667         qed_ll2_kill_buffers(cdev);
1668
1669         qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
1670         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
1671
1672         return rc;
1673 fail:
1674         return -EINVAL;
1675 }
1676
1677 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb)
1678 {
1679         const skb_frag_t *frag;
1680         int rc = -EINVAL, i;
1681         dma_addr_t mapping;
1682         u16 vlan = 0;
1683         u8 flags = 0;
1684
1685         if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
1686                 DP_INFO(cdev, "Cannot transmit a checksumed packet\n");
1687                 return -EINVAL;
1688         }
1689
1690         if (1 + skb_shinfo(skb)->nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) {
1691                 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
1692                        1 + skb_shinfo(skb)->nr_frags);
1693                 return -EINVAL;
1694         }
1695
1696         mapping = dma_map_single(&cdev->pdev->dev, skb->data,
1697                                  skb->len, DMA_TO_DEVICE);
1698         if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
1699                 DP_NOTICE(cdev, "SKB mapping failed\n");
1700                 return -EINVAL;
1701         }
1702
1703         /* Request HW to calculate IP csum */
1704         if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
1705               ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
1706                 flags |= BIT(CORE_TX_BD_FLAGS_IP_CSUM_SHIFT);
1707
1708         if (skb_vlan_tag_present(skb)) {
1709                 vlan = skb_vlan_tag_get(skb);
1710                 flags |= BIT(CORE_TX_BD_FLAGS_VLAN_INSERTION_SHIFT);
1711         }
1712
1713         rc = qed_ll2_prepare_tx_packet(QED_LEADING_HWFN(cdev),
1714                                        cdev->ll2->handle,
1715                                        1 + skb_shinfo(skb)->nr_frags,
1716                                        vlan, flags, 0, 0 /* RoCE FLAVOR */,
1717                                        mapping, skb->len, skb, 1);
1718         if (rc)
1719                 goto err;
1720
1721         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1722                 frag = &skb_shinfo(skb)->frags[i];
1723                 if (!cdev->ll2->frags_mapped) {
1724                         mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0,
1725                                                    skb_frag_size(frag),
1726                                                    DMA_TO_DEVICE);
1727
1728                         if (unlikely(dma_mapping_error(&cdev->pdev->dev,
1729                                                        mapping))) {
1730                                 DP_NOTICE(cdev,
1731                                           "Unable to map frag - dropping packet\n");
1732                                 goto err;
1733                         }
1734                 } else {
1735                         mapping = page_to_phys(skb_frag_page(frag)) |
1736                             frag->page_offset;
1737                 }
1738
1739                 rc = qed_ll2_set_fragment_of_tx_packet(QED_LEADING_HWFN(cdev),
1740                                                        cdev->ll2->handle,
1741                                                        mapping,
1742                                                        skb_frag_size(frag));
1743
1744                 /* if failed not much to do here, partial packet has been posted
1745                  * we can't free memory, will need to wait for completion.
1746                  */
1747                 if (rc)
1748                         goto err2;
1749         }
1750
1751         return 0;
1752
1753 err:
1754         dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE);
1755
1756 err2:
1757         return rc;
1758 }
1759
1760 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats)
1761 {
1762         if (!cdev->ll2)
1763                 return -EINVAL;
1764
1765         return qed_ll2_get_stats(QED_LEADING_HWFN(cdev),
1766                                  cdev->ll2->handle, stats);
1767 }
1768
1769 const struct qed_ll2_ops qed_ll2_ops_pass = {
1770         .start = &qed_ll2_start,
1771         .stop = &qed_ll2_stop,
1772         .start_xmit = &qed_ll2_start_xmit,
1773         .register_cb_ops = &qed_ll2_register_cb_ops,
1774         .get_stats = &qed_ll2_stats,
1775 };
1776
1777 int qed_ll2_alloc_if(struct qed_dev *cdev)
1778 {
1779         cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL);
1780         return cdev->ll2 ? 0 : -ENOMEM;
1781 }
1782
1783 void qed_ll2_dealloc_if(struct qed_dev *cdev)
1784 {
1785         kfree(cdev->ll2);
1786         cdev->ll2 = NULL;
1787 }