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

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
   2 /* QLogic qed NIC Driver
   3  * Copyright (c) 2015-2017  QLogic Corporation
   4  * Copyright (c) 2019-2020 Marvell International Ltd.
   5  */
   6
   7 #include <linux/types.h>
   8 #include <asm/byteorder.h>
   9 #include <linux/dma-mapping.h>
  10 #include <linux/if_vlan.h>
  11 #include <linux/kernel.h>
  12 #include <linux/pci.h>
  13 #include <linux/slab.h>
  14 #include <linux/stddef.h>
  15 #include <linux/workqueue.h>
  16 #include <net/ipv6.h>
  17 #include <linux/bitops.h>
  18 #include <linux/delay.h>
  19 #include <linux/errno.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/io.h>
  22 #include <linux/list.h>
  23 #include <linux/mutex.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/string.h>
  26 #include <linux/qed/qed_ll2_if.h>
  27 #include "qed.h"
  28 #include "qed_cxt.h"
  29 #include "qed_dev_api.h"
  30 #include "qed_hsi.h"
  31 #include "qed_iro_hsi.h"
  32 #include "qed_hw.h"
  33 #include "qed_int.h"
  34 #include "qed_ll2.h"
  35 #include "qed_mcp.h"
  36 #include "qed_ooo.h"
  37 #include "qed_reg_addr.h"
  38 #include "qed_sp.h"
  39 #include "qed_rdma.h"
  40
  41 #define QED_LL2_RX_REGISTERED(ll2)      ((ll2)->rx_queue.b_cb_registered)
  42 #define QED_LL2_TX_REGISTERED(ll2)      ((ll2)->tx_queue.b_cb_registered)
  43
  44 #define QED_LL2_TX_SIZE (256)
  45 #define QED_LL2_RX_SIZE (4096)
  46
  47 #define QED_LL2_INVALID_STATS_ID        0xff
  48
  49 struct qed_cb_ll2_info {
  50         int rx_cnt;
  51         u32 rx_size;
  52         u8 handle;
  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 u8 qed_ll2_handle_to_stats_id(struct qed_hwfn *p_hwfn,
  69                                      u8 ll2_queue_type, u8 qid)
  70 {
  71         u8 stats_id;
  72
  73         /* For legacy (RAM based) queues, the stats_id will be set as the
  74          * queue_id. Otherwise (context based queue), it will be set to
  75          * the "abs_pf_id" offset from the end of the RAM based queue IDs.
  76          * If the final value exceeds the total counters amount, return
  77          * INVALID value to indicate that the stats for this connection should
  78          * be disabled.
  79          */
  80         if (ll2_queue_type == QED_LL2_RX_TYPE_LEGACY)
  81                 stats_id = qid;
  82         else
  83                 stats_id = MAX_NUM_LL2_RX_RAM_QUEUES + p_hwfn->abs_pf_id;
  84
  85         if (stats_id < MAX_NUM_LL2_TX_STATS_COUNTERS)
  86                 return stats_id;
  87         else
  88                 return QED_LL2_INVALID_STATS_ID;
  89 }
  90
  91 static void qed_ll2b_complete_tx_packet(void *cxt,
  92                                         u8 connection_handle,
  93                                         void *cookie,
  94                                         dma_addr_t first_frag_addr,
  95                                         bool b_last_fragment,
  96                                         bool b_last_packet)
  97 {
  98         struct qed_hwfn *p_hwfn = cxt;
  99         struct qed_dev *cdev = p_hwfn->cdev;
 100         struct sk_buff *skb = cookie;
 101
 102         /* All we need to do is release the mapping */
 103         dma_unmap_single(&p_hwfn->cdev->pdev->dev, first_frag_addr,
 104                          skb_headlen(skb), DMA_TO_DEVICE);
 105
 106         if (cdev->ll2->cbs && cdev->ll2->cbs->tx_cb)
 107                 cdev->ll2->cbs->tx_cb(cdev->ll2->cb_cookie, skb,
 108                                       b_last_fragment);
 109
 110         dev_kfree_skb_any(skb);
 111 }
 112
 113 static int qed_ll2_alloc_buffer(struct qed_dev *cdev,
 114                                 u8 **data, dma_addr_t *phys_addr)
 115 {
 116         *data = kmalloc(cdev->ll2->rx_size, GFP_ATOMIC);
 117         if (!(*data)) {
 118                 DP_INFO(cdev, "Failed to allocate LL2 buffer data\n");
 119                 return -ENOMEM;
 120         }
 121
 122         *phys_addr = dma_map_single(&cdev->pdev->dev,
 123                                     ((*data) + NET_SKB_PAD),
 124                                     cdev->ll2->rx_size, DMA_FROM_DEVICE);
 125         if (dma_mapping_error(&cdev->pdev->dev, *phys_addr)) {
 126                 DP_INFO(cdev, "Failed to map LL2 buffer data\n");
 127                 kfree((*data));
 128                 return -ENOMEM;
 129         }
 130
 131         return 0;
 132 }
 133
 134 static int qed_ll2_dealloc_buffer(struct qed_dev *cdev,
 135                                   struct qed_ll2_buffer *buffer)
 136 {
 137         spin_lock_bh(&cdev->ll2->lock);
 138
 139         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
 140                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
 141         kfree(buffer->data);
 142         list_del(&buffer->list);
 143
 144         cdev->ll2->rx_cnt--;
 145         if (!cdev->ll2->rx_cnt)
 146                 DP_INFO(cdev, "All LL2 entries were removed\n");
 147
 148         spin_unlock_bh(&cdev->ll2->lock);
 149
 150         return 0;
 151 }
 152
 153 static void qed_ll2_kill_buffers(struct qed_dev *cdev)
 154 {
 155         struct qed_ll2_buffer *buffer, *tmp_buffer;
 156
 157         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list)
 158                 qed_ll2_dealloc_buffer(cdev, buffer);
 159 }
 160
 161 static void qed_ll2b_complete_rx_packet(void *cxt,
 162                                         struct qed_ll2_comp_rx_data *data)
 163 {
 164         struct qed_hwfn *p_hwfn = cxt;
 165         struct qed_ll2_buffer *buffer = data->cookie;
 166         struct qed_dev *cdev = p_hwfn->cdev;
 167         dma_addr_t new_phys_addr;
 168         struct sk_buff *skb;
 169         bool reuse = false;
 170         int rc = -EINVAL;
 171         u8 *new_data;
 172
 173         DP_VERBOSE(p_hwfn,
 174                    (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA),
 175                    "Got an LL2 Rx completion: [Buffer at phys 0x%llx, offset 0x%02x] Length 0x%04x Parse_flags 0x%04x vlan 0x%04x Opaque data [0x%08x:0x%08x]\n",
 176                    (u64)data->rx_buf_addr,
 177                    data->u.placement_offset,
 178                    data->length.packet_length,
 179                    data->parse_flags,
 180                    data->vlan, data->opaque_data_0, data->opaque_data_1);
 181
 182         if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) {
 183                 print_hex_dump(KERN_INFO, "",
 184                                DUMP_PREFIX_OFFSET, 16, 1,
 185                                buffer->data, data->length.packet_length, false);
 186         }
 187
 188         /* Determine if data is valid */
 189         if (data->length.packet_length < ETH_HLEN)
 190                 reuse = true;
 191
 192         /* Allocate a replacement for buffer; Reuse upon failure */
 193         if (!reuse)
 194                 rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data,
 195                                           &new_phys_addr);
 196
 197         /* If need to reuse or there's no replacement buffer, repost this */
 198         if (rc)
 199                 goto out_post;
 200         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
 201                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
 202
 203         skb = slab_build_skb(buffer->data);
 204         if (!skb) {
 205                 DP_INFO(cdev, "Failed to build SKB\n");
 206                 kfree(buffer->data);
 207                 goto out_post1;
 208         }
 209
 210         data->u.placement_offset += NET_SKB_PAD;
 211         skb_reserve(skb, data->u.placement_offset);
 212         skb_put(skb, data->length.packet_length);
 213         skb_checksum_none_assert(skb);
 214
 215         /* Get parital ethernet information instead of eth_type_trans(),
 216          * Since we don't have an associated net_device.
 217          */
 218         skb_reset_mac_header(skb);
 219         skb->protocol = eth_hdr(skb)->h_proto;
 220
 221         /* Pass SKB onward */
 222         if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) {
 223                 if (data->vlan)
 224                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 225                                                data->vlan);
 226                 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb,
 227                                       data->opaque_data_0,
 228                                       data->opaque_data_1);
 229         } else {
 230                 DP_VERBOSE(p_hwfn, (NETIF_MSG_RX_STATUS | NETIF_MSG_PKTDATA |
 231                                     QED_MSG_LL2 | QED_MSG_STORAGE),
 232                            "Dropping the packet\n");
 233                 kfree(buffer->data);
 234         }
 235
 236 out_post1:
 237         /* Update Buffer information and update FW producer */
 238         buffer->data = new_data;
 239         buffer->phys_addr = new_phys_addr;
 240
 241 out_post:
 242         rc = qed_ll2_post_rx_buffer(p_hwfn, cdev->ll2->handle,
 243                                     buffer->phys_addr, 0, buffer, 1);
 244         if (rc)
 245                 qed_ll2_dealloc_buffer(cdev, buffer);
 246 }
 247
 248 static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 249                                                     u8 connection_handle,
 250                                                     bool b_lock,
 251                                                     bool b_only_active)
 252 {
 253         struct qed_ll2_info *p_ll2_conn, *p_ret = NULL;
 254
 255         if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS)
 256                 return NULL;
 257
 258         if (!p_hwfn->p_ll2_info)
 259                 return NULL;
 260
 261         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
 262
 263         if (b_only_active) {
 264                 if (b_lock)
 265                         mutex_lock(&p_ll2_conn->mutex);
 266                 if (p_ll2_conn->b_active)
 267                         p_ret = p_ll2_conn;
 268                 if (b_lock)
 269                         mutex_unlock(&p_ll2_conn->mutex);
 270         } else {
 271                 p_ret = p_ll2_conn;
 272         }
 273
 274         return p_ret;
 275 }
 276
 277 static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 278                                                   u8 connection_handle)
 279 {
 280         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true);
 281 }
 282
 283 static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn,
 284                                                        u8 connection_handle)
 285 {
 286         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true);
 287 }
 288
 289 static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn
 290                                                            *p_hwfn,
 291                                                            u8 connection_handle)
 292 {
 293         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false);
 294 }
 295
 296 static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 297 {
 298         bool b_last_packet = false, b_last_frag = false;
 299         struct qed_ll2_tx_packet *p_pkt = NULL;
 300         struct qed_ll2_info *p_ll2_conn;
 301         struct qed_ll2_tx_queue *p_tx;
 302         unsigned long flags = 0;
 303         dma_addr_t tx_frag;
 304
 305         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 306         if (!p_ll2_conn)
 307                 return;
 308
 309         p_tx = &p_ll2_conn->tx_queue;
 310
 311         spin_lock_irqsave(&p_tx->lock, flags);
 312         while (!list_empty(&p_tx->active_descq)) {
 313                 p_pkt = list_first_entry(&p_tx->active_descq,
 314                                          struct qed_ll2_tx_packet, list_entry);
 315                 if (!p_pkt)
 316                         break;
 317
 318                 list_del(&p_pkt->list_entry);
 319                 b_last_packet = list_empty(&p_tx->active_descq);
 320                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 321                 spin_unlock_irqrestore(&p_tx->lock, flags);
 322                 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
 323                         struct qed_ooo_buffer *p_buffer;
 324
 325                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 326                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 327                                                 p_buffer);
 328                 } else {
 329                         p_tx->cur_completing_packet = *p_pkt;
 330                         p_tx->cur_completing_bd_idx = 1;
 331                         b_last_frag =
 332                                 p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 333                         tx_frag = p_pkt->bds_set[0].tx_frag;
 334                         p_ll2_conn->cbs.tx_release_cb(p_ll2_conn->cbs.cookie,
 335                                                       p_ll2_conn->my_id,
 336                                                       p_pkt->cookie,
 337                                                       tx_frag,
 338                                                       b_last_frag,
 339                                                       b_last_packet);
 340                 }
 341                 spin_lock_irqsave(&p_tx->lock, flags);
 342         }
 343         spin_unlock_irqrestore(&p_tx->lock, flags);
 344 }
 345
 346 static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 347 {
 348         struct qed_ll2_info *p_ll2_conn = p_cookie;
 349         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 350         u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0;
 351         struct qed_ll2_tx_packet *p_pkt;
 352         bool b_last_frag = false;
 353         unsigned long flags;
 354         int rc = -EINVAL;
 355
 356         if (!p_ll2_conn)
 357                 return rc;
 358
 359         spin_lock_irqsave(&p_tx->lock, flags);
 360         if (p_tx->b_completing_packet) {
 361                 rc = -EBUSY;
 362                 goto out;
 363         }
 364
 365         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 366         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 367         while (num_bds) {
 368                 if (list_empty(&p_tx->active_descq))
 369                         goto out;
 370
 371                 p_pkt = list_first_entry(&p_tx->active_descq,
 372                                          struct qed_ll2_tx_packet, list_entry);
 373                 if (!p_pkt)
 374                         goto out;
 375
 376                 p_tx->b_completing_packet = true;
 377                 p_tx->cur_completing_packet = *p_pkt;
 378                 num_bds_in_packet = p_pkt->bd_used;
 379                 list_del(&p_pkt->list_entry);
 380
 381                 if (unlikely(num_bds < num_bds_in_packet)) {
 382                         DP_NOTICE(p_hwfn,
 383                                   "Rest of BDs does not cover whole packet\n");
 384                         goto out;
 385                 }
 386
 387                 num_bds -= num_bds_in_packet;
 388                 p_tx->bds_idx += num_bds_in_packet;
 389                 while (num_bds_in_packet--)
 390                         qed_chain_consume(&p_tx->txq_chain);
 391
 392                 p_tx->cur_completing_bd_idx = 1;
 393                 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 394                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 395
 396                 spin_unlock_irqrestore(&p_tx->lock, flags);
 397
 398                 p_ll2_conn->cbs.tx_comp_cb(p_ll2_conn->cbs.cookie,
 399                                            p_ll2_conn->my_id,
 400                                            p_pkt->cookie,
 401                                            p_pkt->bds_set[0].tx_frag,
 402                                            b_last_frag, !num_bds);
 403
 404                 spin_lock_irqsave(&p_tx->lock, flags);
 405         }
 406
 407         p_tx->b_completing_packet = false;
 408         rc = 0;
 409 out:
 410         spin_unlock_irqrestore(&p_tx->lock, flags);
 411         return rc;
 412 }
 413
 414 static void qed_ll2_rxq_parse_gsi(struct qed_hwfn *p_hwfn,
 415                                   union core_rx_cqe_union *p_cqe,
 416                                   struct qed_ll2_comp_rx_data *data)
 417 {
 418         data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags);
 419         data->length.data_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length);
 420         data->vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan);
 421         data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi);
 422         data->opaque_data_1 = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo);
 423         data->u.data_length_error = p_cqe->rx_cqe_gsi.data_length_error;
 424         data->qp_id = le16_to_cpu(p_cqe->rx_cqe_gsi.qp_id);
 425
 426         data->src_qp = le32_to_cpu(p_cqe->rx_cqe_gsi.src_qp);
 427 }
 428
 429 static void qed_ll2_rxq_parse_reg(struct qed_hwfn *p_hwfn,
 430                                   union core_rx_cqe_union *p_cqe,
 431                                   struct qed_ll2_comp_rx_data *data)
 432 {
 433         data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_fp.parse_flags.flags);
 434         data->err_flags = le16_to_cpu(p_cqe->rx_cqe_fp.err_flags.flags);
 435         data->length.packet_length =
 436             le16_to_cpu(p_cqe->rx_cqe_fp.packet_length);
 437         data->vlan = le16_to_cpu(p_cqe->rx_cqe_fp.vlan);
 438         data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[0]);
 439         data->opaque_data_1 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[1]);
 440         data->u.placement_offset = p_cqe->rx_cqe_fp.placement_offset;
 441 }
 442
 443 static int
 444 qed_ll2_handle_slowpath(struct qed_hwfn *p_hwfn,
 445                         struct qed_ll2_info *p_ll2_conn,
 446                         union core_rx_cqe_union *p_cqe,
 447                         unsigned long *p_lock_flags)
 448 {
 449         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 450         struct core_rx_slow_path_cqe *sp_cqe;
 451
 452         sp_cqe = &p_cqe->rx_cqe_sp;
 453         if (sp_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) {
 454                 DP_NOTICE(p_hwfn,
 455                           "LL2 - unexpected Rx CQE slowpath ramrod_cmd_id:%d\n",
 456                           sp_cqe->ramrod_cmd_id);
 457                 return -EINVAL;
 458         }
 459
 460         if (!p_ll2_conn->cbs.slowpath_cb) {
 461                 DP_NOTICE(p_hwfn,
 462                           "LL2 - received RX_QUEUE_FLUSH but no callback was provided\n");
 463                 return -EINVAL;
 464         }
 465
 466         spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
 467
 468         p_ll2_conn->cbs.slowpath_cb(p_ll2_conn->cbs.cookie,
 469                                     p_ll2_conn->my_id,
 470                                     le32_to_cpu(sp_cqe->opaque_data.data[0]),
 471                                     le32_to_cpu(sp_cqe->opaque_data.data[1]));
 472
 473         spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
 474
 475         return 0;
 476 }
 477
 478 static int
 479 qed_ll2_rxq_handle_completion(struct qed_hwfn *p_hwfn,
 480                               struct qed_ll2_info *p_ll2_conn,
 481                               union core_rx_cqe_union *p_cqe,
 482                               unsigned long *p_lock_flags, bool b_last_cqe)
 483 {
 484         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 485         struct qed_ll2_rx_packet *p_pkt = NULL;
 486         struct qed_ll2_comp_rx_data data;
 487
 488         if (!list_empty(&p_rx->active_descq))
 489                 p_pkt = list_first_entry(&p_rx->active_descq,
 490                                          struct qed_ll2_rx_packet, list_entry);
 491         if (unlikely(!p_pkt)) {
 492                 DP_NOTICE(p_hwfn,
 493                           "[%d] LL2 Rx completion but active_descq is empty\n",
 494                           p_ll2_conn->input.conn_type);
 495
 496                 return -EIO;
 497         }
 498         list_del(&p_pkt->list_entry);
 499
 500         if (p_cqe->rx_cqe_sp.type == CORE_RX_CQE_TYPE_REGULAR)
 501                 qed_ll2_rxq_parse_reg(p_hwfn, p_cqe, &data);
 502         else
 503                 qed_ll2_rxq_parse_gsi(p_hwfn, p_cqe, &data);
 504         if (unlikely(qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd))
 505                 DP_NOTICE(p_hwfn,
 506                           "Mismatch between active_descq and the LL2 Rx chain\n");
 507
 508         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 509
 510         data.connection_handle = p_ll2_conn->my_id;
 511         data.cookie = p_pkt->cookie;
 512         data.rx_buf_addr = p_pkt->rx_buf_addr;
 513         data.b_last_packet = b_last_cqe;
 514
 515         spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
 516         p_ll2_conn->cbs.rx_comp_cb(p_ll2_conn->cbs.cookie, &data);
 517
 518         spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
 519
 520         return 0;
 521 }
 522
 523 static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie)
 524 {
 525         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)cookie;
 526         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 527         union core_rx_cqe_union *cqe = NULL;
 528         u16 cq_new_idx = 0, cq_old_idx = 0;
 529         unsigned long flags = 0;
 530         int rc = 0;
 531
 532         if (!p_ll2_conn)
 533                 return rc;
 534
 535         spin_lock_irqsave(&p_rx->lock, flags);
 536
 537         if (!QED_LL2_RX_REGISTERED(p_ll2_conn)) {
 538                 spin_unlock_irqrestore(&p_rx->lock, flags);
 539                 return 0;
 540         }
 541
 542         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 543         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 544
 545         while (cq_new_idx != cq_old_idx) {
 546                 bool b_last_cqe = (cq_new_idx == cq_old_idx);
 547
 548                 cqe =
 549                     (union core_rx_cqe_union *)
 550                     qed_chain_consume(&p_rx->rcq_chain);
 551                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 552
 553                 DP_VERBOSE(p_hwfn,
 554                            QED_MSG_LL2,
 555                            "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n",
 556                            cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type);
 557
 558                 switch (cqe->rx_cqe_sp.type) {
 559                 case CORE_RX_CQE_TYPE_SLOW_PATH:
 560                         rc = qed_ll2_handle_slowpath(p_hwfn, p_ll2_conn,
 561                                                      cqe, &flags);
 562                         break;
 563                 case CORE_RX_CQE_TYPE_GSI_OFFLOAD:
 564                 case CORE_RX_CQE_TYPE_REGULAR:
 565                         rc = qed_ll2_rxq_handle_completion(p_hwfn, p_ll2_conn,
 566                                                            cqe, &flags,
 567                                                            b_last_cqe);
 568                         break;
 569                 default:
 570                         rc = -EIO;
 571                 }
 572         }
 573
 574         spin_unlock_irqrestore(&p_rx->lock, flags);
 575         return rc;
 576 }
 577
 578 static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 579 {
 580         struct qed_ll2_info *p_ll2_conn = NULL;
 581         struct qed_ll2_rx_packet *p_pkt = NULL;
 582         struct qed_ll2_rx_queue *p_rx;
 583         unsigned long flags = 0;
 584
 585         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 586         if (!p_ll2_conn)
 587                 return;
 588
 589         p_rx = &p_ll2_conn->rx_queue;
 590
 591         spin_lock_irqsave(&p_rx->lock, flags);
 592         while (!list_empty(&p_rx->active_descq)) {
 593                 p_pkt = list_first_entry(&p_rx->active_descq,
 594                                          struct qed_ll2_rx_packet, list_entry);
 595                 if (!p_pkt)
 596                         break;
 597                 list_move_tail(&p_pkt->list_entry, &p_rx->free_descq);
 598                 spin_unlock_irqrestore(&p_rx->lock, flags);
 599
 600                 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
 601                         struct qed_ooo_buffer *p_buffer;
 602
 603                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 604                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 605                                                 p_buffer);
 606                 } else {
 607                         dma_addr_t rx_buf_addr = p_pkt->rx_buf_addr;
 608                         void *cookie = p_pkt->cookie;
 609                         bool b_last;
 610
 611                         b_last = list_empty(&p_rx->active_descq);
 612                         p_ll2_conn->cbs.rx_release_cb(p_ll2_conn->cbs.cookie,
 613                                                       p_ll2_conn->my_id,
 614                                                       cookie,
 615                                                       rx_buf_addr, b_last);
 616                 }
 617                 spin_lock_irqsave(&p_rx->lock, flags);
 618         }
 619         spin_unlock_irqrestore(&p_rx->lock, flags);
 620 }
 621
 622 static bool
 623 qed_ll2_lb_rxq_handler_slowpath(struct qed_hwfn *p_hwfn,
 624                                 struct core_rx_slow_path_cqe *p_cqe)
 625 {
 626         struct ooo_opaque *ooo_opq;
 627         u32 cid;
 628
 629         if (p_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH)
 630                 return false;
 631
 632         ooo_opq = (struct ooo_opaque *)&p_cqe->opaque_data;
 633         if (ooo_opq->ooo_opcode != TCP_EVENT_DELETE_ISLES)
 634                 return false;
 635
 636         /* Need to make a flush */
 637         cid = le32_to_cpu(ooo_opq->cid);
 638         qed_ooo_release_connection_isles(p_hwfn, p_hwfn->p_ooo_info, cid);
 639
 640         return true;
 641 }
 642
 643 static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn,
 644                                   struct qed_ll2_info *p_ll2_conn)
 645 {
 646         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 647         u16 packet_length = 0, parse_flags = 0, vlan = 0;
 648         struct qed_ll2_rx_packet *p_pkt = NULL;
 649         u32 num_ooo_add_to_peninsula = 0, cid;
 650         union core_rx_cqe_union *cqe = NULL;
 651         u16 cq_new_idx = 0, cq_old_idx = 0;
 652         struct qed_ooo_buffer *p_buffer;
 653         struct ooo_opaque *ooo_opq;
 654         u8 placement_offset = 0;
 655         u8 cqe_type;
 656
 657         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 658         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 659         if (cq_new_idx == cq_old_idx)
 660                 return 0;
 661
 662         while (cq_new_idx != cq_old_idx) {
 663                 struct core_rx_fast_path_cqe *p_cqe_fp;
 664
 665                 cqe = qed_chain_consume(&p_rx->rcq_chain);
 666                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 667                 cqe_type = cqe->rx_cqe_sp.type;
 668
 669                 if (cqe_type == CORE_RX_CQE_TYPE_SLOW_PATH)
 670                         if (qed_ll2_lb_rxq_handler_slowpath(p_hwfn,
 671                                                             &cqe->rx_cqe_sp))
 672                                 continue;
 673
 674                 if (unlikely(cqe_type != CORE_RX_CQE_TYPE_REGULAR)) {
 675                         DP_NOTICE(p_hwfn,
 676                                   "Got a non-regular LB LL2 completion [type 0x%02x]\n",
 677                                   cqe_type);
 678                         return -EINVAL;
 679                 }
 680                 p_cqe_fp = &cqe->rx_cqe_fp;
 681
 682                 placement_offset = p_cqe_fp->placement_offset;
 683                 parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags);
 684                 packet_length = le16_to_cpu(p_cqe_fp->packet_length);
 685                 vlan = le16_to_cpu(p_cqe_fp->vlan);
 686                 ooo_opq = (struct ooo_opaque *)&p_cqe_fp->opaque_data;
 687                 qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info, ooo_opq);
 688                 cid = le32_to_cpu(ooo_opq->cid);
 689
 690                 /* Process delete isle first */
 691                 if (ooo_opq->drop_size)
 692                         qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid,
 693                                              ooo_opq->drop_isle,
 694                                              ooo_opq->drop_size);
 695
 696                 if (ooo_opq->ooo_opcode == TCP_EVENT_NOP)
 697                         continue;
 698
 699                 /* Now process create/add/join isles */
 700                 if (unlikely(list_empty(&p_rx->active_descq))) {
 701                         DP_NOTICE(p_hwfn,
 702                                   "LL2 OOO RX chain has no submitted buffers\n"
 703                                   );
 704                         return -EIO;
 705                 }
 706
 707                 p_pkt = list_first_entry(&p_rx->active_descq,
 708                                          struct qed_ll2_rx_packet, list_entry);
 709
 710                 if (likely(ooo_opq->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE ||
 711                            ooo_opq->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT ||
 712                            ooo_opq->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT ||
 713                            ooo_opq->ooo_opcode == TCP_EVENT_ADD_PEN ||
 714                            ooo_opq->ooo_opcode == TCP_EVENT_JOIN)) {
 715                         if (unlikely(!p_pkt)) {
 716                                 DP_NOTICE(p_hwfn,
 717                                           "LL2 OOO RX packet is not valid\n");
 718                                 return -EIO;
 719                         }
 720                         list_del(&p_pkt->list_entry);
 721                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 722                         p_buffer->packet_length = packet_length;
 723                         p_buffer->parse_flags = parse_flags;
 724                         p_buffer->vlan = vlan;
 725                         p_buffer->placement_offset = placement_offset;
 726                         qed_chain_consume(&p_rx->rxq_chain);
 727                         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 728
 729                         switch (ooo_opq->ooo_opcode) {
 730                         case TCP_EVENT_ADD_NEW_ISLE:
 731                                 qed_ooo_add_new_isle(p_hwfn,
 732                                                      p_hwfn->p_ooo_info,
 733                                                      cid,
 734                                                      ooo_opq->ooo_isle,
 735                                                      p_buffer);
 736                                 break;
 737                         case TCP_EVENT_ADD_ISLE_RIGHT:
 738                                 qed_ooo_add_new_buffer(p_hwfn,
 739                                                        p_hwfn->p_ooo_info,
 740                                                        cid,
 741                                                        ooo_opq->ooo_isle,
 742                                                        p_buffer,
 743                                                        QED_OOO_RIGHT_BUF);
 744                                 break;
 745                         case TCP_EVENT_ADD_ISLE_LEFT:
 746                                 qed_ooo_add_new_buffer(p_hwfn,
 747                                                        p_hwfn->p_ooo_info,
 748                                                        cid,
 749                                                        ooo_opq->ooo_isle,
 750                                                        p_buffer,
 751                                                        QED_OOO_LEFT_BUF);
 752                                 break;
 753                         case TCP_EVENT_JOIN:
 754                                 qed_ooo_add_new_buffer(p_hwfn,
 755                                                        p_hwfn->p_ooo_info,
 756                                                        cid,
 757                                                        ooo_opq->ooo_isle + 1,
 758                                                        p_buffer,
 759                                                        QED_OOO_LEFT_BUF);
 760                                 qed_ooo_join_isles(p_hwfn,
 761                                                    p_hwfn->p_ooo_info,
 762                                                    cid, ooo_opq->ooo_isle);
 763                                 break;
 764                         case TCP_EVENT_ADD_PEN:
 765                                 num_ooo_add_to_peninsula++;
 766                                 qed_ooo_put_ready_buffer(p_hwfn,
 767                                                          p_hwfn->p_ooo_info,
 768                                                          p_buffer, true);
 769                                 break;
 770                         }
 771                 } else {
 772                         DP_NOTICE(p_hwfn,
 773                                   "Unexpected event (%d) TX OOO completion\n",
 774                                   ooo_opq->ooo_opcode);
 775                 }
 776         }
 777
 778         return 0;
 779 }
 780
 781 static void
 782 qed_ooo_submit_tx_buffers(struct qed_hwfn *p_hwfn,
 783                           struct qed_ll2_info *p_ll2_conn)
 784 {
 785         struct qed_ll2_tx_pkt_info tx_pkt;
 786         struct qed_ooo_buffer *p_buffer;
 787         u16 l4_hdr_offset_w;
 788         dma_addr_t first_frag;
 789         u8 bd_flags;
 790         int rc;
 791
 792         /* Submit Tx buffers here */
 793         while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn,
 794                                                     p_hwfn->p_ooo_info))) {
 795                 l4_hdr_offset_w = 0;
 796                 bd_flags = 0;
 797
 798                 first_frag = p_buffer->rx_buffer_phys_addr +
 799                              p_buffer->placement_offset;
 800                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_FORCE_VLAN_MODE, 1);
 801                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_L4_PROTOCOL, 1);
 802
 803                 memset(&tx_pkt, 0, sizeof(tx_pkt));
 804                 tx_pkt.num_of_bds = 1;
 805                 tx_pkt.vlan = p_buffer->vlan;
 806                 tx_pkt.bd_flags = bd_flags;
 807                 tx_pkt.l4_hdr_offset_w = l4_hdr_offset_w;
 808                 switch (p_ll2_conn->tx_dest) {
 809                 case CORE_TX_DEST_NW:
 810                         tx_pkt.tx_dest = QED_LL2_TX_DEST_NW;
 811                         break;
 812                 case CORE_TX_DEST_LB:
 813                         tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
 814                         break;
 815                 case CORE_TX_DEST_DROP:
 816                 default:
 817                         tx_pkt.tx_dest = QED_LL2_TX_DEST_DROP;
 818                         break;
 819                 }
 820                 tx_pkt.first_frag = first_frag;
 821                 tx_pkt.first_frag_len = p_buffer->packet_length;
 822                 tx_pkt.cookie = p_buffer;
 823
 824                 rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id,
 825                                                &tx_pkt, true);
 826                 if (rc) {
 827                         qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info,
 828                                                  p_buffer, false);
 829                         break;
 830                 }
 831         }
 832 }
 833
 834 static void
 835 qed_ooo_submit_rx_buffers(struct qed_hwfn *p_hwfn,
 836                           struct qed_ll2_info *p_ll2_conn)
 837 {
 838         struct qed_ooo_buffer *p_buffer;
 839         int rc;
 840
 841         while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
 842                                                    p_hwfn->p_ooo_info))) {
 843                 rc = qed_ll2_post_rx_buffer(p_hwfn,
 844                                             p_ll2_conn->my_id,
 845                                             p_buffer->rx_buffer_phys_addr,
 846                                             0, p_buffer, true);
 847                 if (rc) {
 848                         qed_ooo_put_free_buffer(p_hwfn,
 849                                                 p_hwfn->p_ooo_info, p_buffer);
 850                         break;
 851                 }
 852         }
 853 }
 854
 855 static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 856 {
 857         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
 858         int rc;
 859
 860         if (!p_ll2_conn)
 861                 return 0;
 862
 863         if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
 864                 return 0;
 865
 866         rc = qed_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn);
 867         if (rc)
 868                 return rc;
 869
 870         qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
 871         qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
 872
 873         return 0;
 874 }
 875
 876 static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 877 {
 878         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
 879         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 880         struct qed_ll2_tx_packet *p_pkt = NULL;
 881         struct qed_ooo_buffer *p_buffer;
 882         bool b_dont_submit_rx = false;
 883         u16 new_idx = 0, num_bds = 0;
 884         int rc;
 885
 886         if (unlikely(!p_ll2_conn))
 887                 return 0;
 888
 889         if (unlikely(!QED_LL2_TX_REGISTERED(p_ll2_conn)))
 890                 return 0;
 891
 892         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 893         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 894
 895         if (unlikely(!num_bds))
 896                 return 0;
 897
 898         while (num_bds) {
 899                 if (list_empty(&p_tx->active_descq))
 900                         return -EINVAL;
 901
 902                 p_pkt = list_first_entry(&p_tx->active_descq,
 903                                          struct qed_ll2_tx_packet, list_entry);
 904                 if (unlikely(!p_pkt))
 905                         return -EINVAL;
 906
 907                 if (unlikely(p_pkt->bd_used != 1)) {
 908                         DP_NOTICE(p_hwfn,
 909                                   "Unexpectedly many BDs(%d) in TX OOO completion\n",
 910                                   p_pkt->bd_used);
 911                         return -EINVAL;
 912                 }
 913
 914                 list_del(&p_pkt->list_entry);
 915
 916                 num_bds--;
 917                 p_tx->bds_idx++;
 918                 qed_chain_consume(&p_tx->txq_chain);
 919
 920                 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 921                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 922
 923                 if (b_dont_submit_rx) {
 924                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 925                                                 p_buffer);
 926                         continue;
 927                 }
 928
 929                 rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id,
 930                                             p_buffer->rx_buffer_phys_addr, 0,
 931                                             p_buffer, true);
 932                 if (rc != 0) {
 933                         qed_ooo_put_free_buffer(p_hwfn,
 934                                                 p_hwfn->p_ooo_info, p_buffer);
 935                         b_dont_submit_rx = true;
 936                 }
 937         }
 938
 939         qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
 940
 941         return 0;
 942 }
 943
 944 static void qed_ll2_stop_ooo(struct qed_hwfn *p_hwfn)
 945 {
 946         u8 *handle = &p_hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
 947
 948         DP_VERBOSE(p_hwfn, (QED_MSG_STORAGE | QED_MSG_LL2),
 949                    "Stopping LL2 OOO queue [%02x]\n", *handle);
 950
 951         qed_ll2_terminate_connection(p_hwfn, *handle);
 952         qed_ll2_release_connection(p_hwfn, *handle);
 953         *handle = QED_LL2_UNUSED_HANDLE;
 954 }
 955
 956 static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn,
 957                                      struct qed_ll2_info *p_ll2_conn,
 958                                      u8 action_on_error)
 959 {
 960         enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
 961         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 962         struct core_rx_start_ramrod_data *p_ramrod = NULL;
 963         struct qed_spq_entry *p_ent = NULL;
 964         struct qed_sp_init_data init_data;
 965         u16 cqe_pbl_size;
 966         int rc = 0;
 967
 968         /* Get SPQ entry */
 969         memset(&init_data, 0, sizeof(init_data));
 970         init_data.cid = p_ll2_conn->cid;
 971         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 972         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 973
 974         rc = qed_sp_init_request(p_hwfn, &p_ent,
 975                                  CORE_RAMROD_RX_QUEUE_START,
 976                                  PROTOCOLID_CORE, &init_data);
 977         if (rc)
 978                 return rc;
 979
 980         p_ramrod = &p_ent->ramrod.core_rx_queue_start;
 981         memset(p_ramrod, 0, sizeof(*p_ramrod));
 982         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
 983         p_ramrod->sb_index = p_rx->rx_sb_index;
 984         p_ramrod->complete_event_flg = 1;
 985
 986         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
 987         DMA_REGPAIR_LE(p_ramrod->bd_base, p_rx->rxq_chain.p_phys_addr);
 988         cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain);
 989         p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size);
 990         DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr,
 991                        qed_chain_get_pbl_phys(&p_rx->rcq_chain));
 992
 993         p_ramrod->drop_ttl0_flg = p_ll2_conn->input.rx_drop_ttl0_flg;
 994         p_ramrod->inner_vlan_stripping_en =
 995                 p_ll2_conn->input.rx_vlan_removal_en;
 996
 997         if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
 998             p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE)
 999                 p_ramrod->report_outer_vlan = 1;
1000         p_ramrod->queue_id = p_ll2_conn->queue_id;
1001         p_ramrod->main_func_queue = p_ll2_conn->main_func_queue ? 1 : 0;
1002
1003         if (test_bit(QED_MF_LL2_NON_UNICAST, &p_hwfn->cdev->mf_bits) &&
1004             p_ramrod->main_func_queue && conn_type != QED_LL2_TYPE_ROCE &&
1005             conn_type != QED_LL2_TYPE_IWARP &&
1006                 (!QED_IS_NVMETCP_PERSONALITY(p_hwfn))) {
1007                 p_ramrod->mf_si_bcast_accept_all = 1;
1008                 p_ramrod->mf_si_mcast_accept_all = 1;
1009         } else {
1010                 p_ramrod->mf_si_bcast_accept_all = 0;
1011                 p_ramrod->mf_si_mcast_accept_all = 0;
1012         }
1013
1014         p_ramrod->action_on_error.error_type = action_on_error;
1015         p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1016         p_ramrod->zero_prod_flg = 1;
1017
1018         return qed_spq_post(p_hwfn, p_ent, NULL);
1019 }
1020
1021 static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
1022                                      struct qed_ll2_info *p_ll2_conn)
1023 {
1024         enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
1025         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1026         struct core_tx_start_ramrod_data *p_ramrod = NULL;
1027         struct qed_spq_entry *p_ent = NULL;
1028         struct qed_sp_init_data init_data;
1029         u16 pq_id = 0, pbl_size;
1030         int rc = -EINVAL;
1031
1032         if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
1033                 return 0;
1034
1035         if (likely(p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO))
1036                 p_ll2_conn->tx_stats_en = 0;
1037         else
1038                 p_ll2_conn->tx_stats_en = 1;
1039
1040         /* Get SPQ entry */
1041         memset(&init_data, 0, sizeof(init_data));
1042         init_data.cid = p_ll2_conn->cid;
1043         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1044         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1045
1046         rc = qed_sp_init_request(p_hwfn, &p_ent,
1047                                  CORE_RAMROD_TX_QUEUE_START,
1048                                  PROTOCOLID_CORE, &init_data);
1049         if (rc)
1050                 return rc;
1051
1052         p_ramrod = &p_ent->ramrod.core_tx_queue_start;
1053
1054         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
1055         p_ramrod->sb_index = p_tx->tx_sb_index;
1056         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
1057         p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
1058         p_ramrod->stats_id = p_ll2_conn->tx_stats_id;
1059
1060         DMA_REGPAIR_LE(p_ramrod->pbl_base_addr,
1061                        qed_chain_get_pbl_phys(&p_tx->txq_chain));
1062         pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain);
1063         p_ramrod->pbl_size = cpu_to_le16(pbl_size);
1064
1065         switch (p_ll2_conn->input.tx_tc) {
1066         case PURE_LB_TC:
1067                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
1068                 break;
1069         case PKT_LB_TC:
1070                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO);
1071                 break;
1072         default:
1073                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
1074                 break;
1075         }
1076
1077         p_ramrod->qm_pq_id = cpu_to_le16(pq_id);
1078
1079         switch (conn_type) {
1080         case QED_LL2_TYPE_FCOE:
1081                 p_ramrod->conn_type = PROTOCOLID_FCOE;
1082                 break;
1083         case QED_LL2_TYPE_TCP_ULP:
1084                 p_ramrod->conn_type = PROTOCOLID_TCP_ULP;
1085                 break;
1086         case QED_LL2_TYPE_ROCE:
1087                 p_ramrod->conn_type = PROTOCOLID_ROCE;
1088                 break;
1089         case QED_LL2_TYPE_IWARP:
1090                 p_ramrod->conn_type = PROTOCOLID_IWARP;
1091                 break;
1092         case QED_LL2_TYPE_OOO:
1093                 if (p_hwfn->hw_info.personality == QED_PCI_ISCSI ||
1094                     p_hwfn->hw_info.personality == QED_PCI_NVMETCP)
1095                         p_ramrod->conn_type = PROTOCOLID_TCP_ULP;
1096                 else
1097                         p_ramrod->conn_type = PROTOCOLID_IWARP;
1098                 break;
1099         default:
1100                 p_ramrod->conn_type = PROTOCOLID_ETH;
1101                 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type);
1102         }
1103
1104         p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1105
1106         rc = qed_spq_post(p_hwfn, p_ent, NULL);
1107         if (rc)
1108                 return rc;
1109
1110         rc = qed_db_recovery_add(p_hwfn->cdev, p_tx->doorbell_addr,
1111                                  &p_tx->db_msg, DB_REC_WIDTH_32B,
1112                                  DB_REC_KERNEL);
1113         return rc;
1114 }
1115
1116 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn,
1117                                     struct qed_ll2_info *p_ll2_conn)
1118 {
1119         struct core_rx_stop_ramrod_data *p_ramrod = NULL;
1120         struct qed_spq_entry *p_ent = NULL;
1121         struct qed_sp_init_data init_data;
1122         int rc = -EINVAL;
1123
1124         /* Get SPQ entry */
1125         memset(&init_data, 0, sizeof(init_data));
1126         init_data.cid = p_ll2_conn->cid;
1127         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1128         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1129
1130         rc = qed_sp_init_request(p_hwfn, &p_ent,
1131                                  CORE_RAMROD_RX_QUEUE_STOP,
1132                                  PROTOCOLID_CORE, &init_data);
1133         if (rc)
1134                 return rc;
1135
1136         p_ramrod = &p_ent->ramrod.core_rx_queue_stop;
1137
1138         p_ramrod->complete_event_flg = 1;
1139         p_ramrod->queue_id = p_ll2_conn->queue_id;
1140
1141         return qed_spq_post(p_hwfn, p_ent, NULL);
1142 }
1143
1144 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn,
1145                                     struct qed_ll2_info *p_ll2_conn)
1146 {
1147         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1148         struct qed_spq_entry *p_ent = NULL;
1149         struct qed_sp_init_data init_data;
1150         int rc = -EINVAL;
1151
1152         qed_db_recovery_del(p_hwfn->cdev, p_tx->doorbell_addr, &p_tx->db_msg);
1153
1154         /* Get SPQ entry */
1155         memset(&init_data, 0, sizeof(init_data));
1156         init_data.cid = p_ll2_conn->cid;
1157         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1158         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1159
1160         rc = qed_sp_init_request(p_hwfn, &p_ent,
1161                                  CORE_RAMROD_TX_QUEUE_STOP,
1162                                  PROTOCOLID_CORE, &init_data);
1163         if (rc)
1164                 return rc;
1165
1166         return qed_spq_post(p_hwfn, p_ent, NULL);
1167 }
1168
1169 static int
1170 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
1171                               struct qed_ll2_info *p_ll2_info)
1172 {
1173         struct qed_chain_init_params params = {
1174                 .intended_use   = QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1175                 .cnt_type       = QED_CHAIN_CNT_TYPE_U16,
1176                 .num_elems      = p_ll2_info->input.rx_num_desc,
1177         };
1178         struct qed_dev *cdev = p_hwfn->cdev;
1179         struct qed_ll2_rx_packet *p_descq;
1180         u32 capacity;
1181         int rc = 0;
1182
1183         if (!p_ll2_info->input.rx_num_desc)
1184                 goto out;
1185
1186         params.mode = QED_CHAIN_MODE_NEXT_PTR;
1187         params.elem_size = sizeof(struct core_rx_bd);
1188
1189         rc = qed_chain_alloc(cdev, &p_ll2_info->rx_queue.rxq_chain, &params);
1190         if (rc) {
1191                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
1192                 goto out;
1193         }
1194
1195         capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
1196         p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet),
1197                           GFP_KERNEL);
1198         if (!p_descq) {
1199                 rc = -ENOMEM;
1200                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n");
1201                 goto out;
1202         }
1203         p_ll2_info->rx_queue.descq_array = p_descq;
1204
1205         params.mode = QED_CHAIN_MODE_PBL;
1206         params.elem_size = sizeof(struct core_rx_fast_path_cqe);
1207
1208         rc = qed_chain_alloc(cdev, &p_ll2_info->rx_queue.rcq_chain, &params);
1209         if (rc) {
1210                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
1211                 goto out;
1212         }
1213
1214         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1215                    "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
1216                    p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc);
1217
1218 out:
1219         return rc;
1220 }
1221
1222 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
1223                                          struct qed_ll2_info *p_ll2_info)
1224 {
1225         struct qed_chain_init_params params = {
1226                 .mode           = QED_CHAIN_MODE_PBL,
1227                 .intended_use   = QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1228                 .cnt_type       = QED_CHAIN_CNT_TYPE_U16,
1229                 .num_elems      = p_ll2_info->input.tx_num_desc,
1230                 .elem_size      = sizeof(struct core_tx_bd),
1231         };
1232         struct qed_ll2_tx_packet *p_descq;
1233         size_t desc_size;
1234         u32 capacity;
1235         int rc = 0;
1236
1237         if (!p_ll2_info->input.tx_num_desc)
1238                 goto out;
1239
1240         rc = qed_chain_alloc(p_hwfn->cdev, &p_ll2_info->tx_queue.txq_chain,
1241                              &params);
1242         if (rc)
1243                 goto out;
1244
1245         capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
1246         /* All bds_set elements are flexibily added. */
1247         desc_size = struct_size(p_descq, bds_set,
1248                                 p_ll2_info->input.tx_max_bds_per_packet);
1249
1250         p_descq = kcalloc(capacity, desc_size, GFP_KERNEL);
1251         if (!p_descq) {
1252                 rc = -ENOMEM;
1253                 goto out;
1254         }
1255         p_ll2_info->tx_queue.descq_mem = p_descq;
1256
1257         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1258                    "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
1259                    p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc);
1260
1261 out:
1262         if (rc)
1263                 DP_NOTICE(p_hwfn,
1264                           "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
1265                           p_ll2_info->input.tx_num_desc);
1266         return rc;
1267 }
1268
1269 static int
1270 qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn,
1271                                struct qed_ll2_info *p_ll2_info, u16 mtu)
1272 {
1273         struct qed_ooo_buffer *p_buf = NULL;
1274         void *p_virt;
1275         u16 buf_idx;
1276         int rc = 0;
1277
1278         if (p_ll2_info->input.conn_type != QED_LL2_TYPE_OOO)
1279                 return rc;
1280
1281         /* Correct number of requested OOO buffers if needed */
1282         if (!p_ll2_info->input.rx_num_ooo_buffers) {
1283                 u16 num_desc = p_ll2_info->input.rx_num_desc;
1284
1285                 if (!num_desc)
1286                         return -EINVAL;
1287                 p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2;
1288         }
1289
1290         for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers;
1291              buf_idx++) {
1292                 p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL);
1293                 if (!p_buf) {
1294                         rc = -ENOMEM;
1295                         goto out;
1296                 }
1297
1298                 p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE;
1299                 p_buf->rx_buffer_size = (p_buf->rx_buffer_size +
1300                                          ETH_CACHE_LINE_SIZE - 1) &
1301                                         ~(ETH_CACHE_LINE_SIZE - 1);
1302                 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
1303                                             p_buf->rx_buffer_size,
1304                                             &p_buf->rx_buffer_phys_addr,
1305                                             GFP_KERNEL);
1306                 if (!p_virt) {
1307                         kfree(p_buf);
1308                         rc = -ENOMEM;
1309                         goto out;
1310                 }
1311
1312                 p_buf->rx_buffer_virt_addr = p_virt;
1313                 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf);
1314         }
1315
1316         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1317                    "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n",
1318                    p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size);
1319
1320 out:
1321         return rc;
1322 }
1323
1324 static int
1325 qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs)
1326 {
1327         if (!cbs || (!cbs->rx_comp_cb ||
1328                      !cbs->rx_release_cb ||
1329                      !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie))
1330                 return -EINVAL;
1331
1332         p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb;
1333         p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb;
1334         p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb;
1335         p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb;
1336         p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb;
1337         p_ll2_info->cbs.cookie = cbs->cookie;
1338
1339         return 0;
1340 }
1341
1342 static void _qed_ll2_calc_allowed_conns(struct qed_hwfn *p_hwfn,
1343                                         struct qed_ll2_acquire_data *data,
1344                                         u8 *start_idx, u8 *last_idx)
1345 {
1346         /* LL2 queues handles will be split as follows:
1347          * First will be the legacy queues, and then the ctx based.
1348          */
1349         if (data->input.rx_conn_type == QED_LL2_RX_TYPE_LEGACY) {
1350                 *start_idx = QED_LL2_LEGACY_CONN_BASE_PF;
1351                 *last_idx = *start_idx +
1352                         QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF;
1353         } else {
1354                 /* QED_LL2_RX_TYPE_CTX */
1355                 *start_idx = QED_LL2_CTX_CONN_BASE_PF;
1356                 *last_idx = *start_idx +
1357                         QED_MAX_NUM_OF_CTX_LL2_CONNS_PF;
1358         }
1359 }
1360
1361 static enum core_error_handle
1362 qed_ll2_get_error_choice(enum qed_ll2_error_handle err)
1363 {
1364         switch (err) {
1365         case QED_LL2_DROP_PACKET:
1366                 return LL2_DROP_PACKET;
1367         case QED_LL2_DO_NOTHING:
1368                 return LL2_DO_NOTHING;
1369         case QED_LL2_ASSERT:
1370                 return LL2_ASSERT;
1371         default:
1372                 return LL2_DO_NOTHING;
1373         }
1374 }
1375
1376 int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data)
1377 {
1378         struct qed_hwfn *p_hwfn = cxt;
1379         qed_int_comp_cb_t comp_rx_cb, comp_tx_cb;
1380         struct qed_ll2_info *p_ll2_info = NULL;
1381         u8 i, first_idx, last_idx, *p_tx_max;
1382         int rc;
1383
1384         if (!data->p_connection_handle || !p_hwfn->p_ll2_info)
1385                 return -EINVAL;
1386
1387         _qed_ll2_calc_allowed_conns(p_hwfn, data, &first_idx, &last_idx);
1388
1389         /* Find a free connection to be used */
1390         for (i = first_idx; i < last_idx; i++) {
1391                 mutex_lock(&p_hwfn->p_ll2_info[i].mutex);
1392                 if (p_hwfn->p_ll2_info[i].b_active) {
1393                         mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1394                         continue;
1395                 }
1396
1397                 p_hwfn->p_ll2_info[i].b_active = true;
1398                 p_ll2_info = &p_hwfn->p_ll2_info[i];
1399                 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1400                 break;
1401         }
1402         if (!p_ll2_info)
1403                 return -EBUSY;
1404
1405         memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input));
1406
1407         switch (data->input.tx_dest) {
1408         case QED_LL2_TX_DEST_NW:
1409                 p_ll2_info->tx_dest = CORE_TX_DEST_NW;
1410                 break;
1411         case QED_LL2_TX_DEST_LB:
1412                 p_ll2_info->tx_dest = CORE_TX_DEST_LB;
1413                 break;
1414         case QED_LL2_TX_DEST_DROP:
1415                 p_ll2_info->tx_dest = CORE_TX_DEST_DROP;
1416                 break;
1417         default:
1418                 return -EINVAL;
1419         }
1420
1421         if (data->input.conn_type == QED_LL2_TYPE_OOO ||
1422             data->input.secondary_queue)
1423                 p_ll2_info->main_func_queue = false;
1424         else
1425                 p_ll2_info->main_func_queue = true;
1426
1427         /* Correct maximum number of Tx BDs */
1428         p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet;
1429         if (*p_tx_max == 0)
1430                 *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET;
1431         else
1432                 *p_tx_max = min_t(u8, *p_tx_max,
1433                                   CORE_LL2_TX_MAX_BDS_PER_PACKET);
1434
1435         rc = qed_ll2_set_cbs(p_ll2_info, data->cbs);
1436         if (rc) {
1437                 DP_NOTICE(p_hwfn, "Invalid callback functions\n");
1438                 goto q_allocate_fail;
1439         }
1440
1441         rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info);
1442         if (rc)
1443                 goto q_allocate_fail;
1444
1445         rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info);
1446         if (rc)
1447                 goto q_allocate_fail;
1448
1449         rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info,
1450                                             data->input.mtu);
1451         if (rc)
1452                 goto q_allocate_fail;
1453
1454         /* Register callbacks for the Rx/Tx queues */
1455         if (data->input.conn_type == QED_LL2_TYPE_OOO) {
1456                 comp_rx_cb = qed_ll2_lb_rxq_completion;
1457                 comp_tx_cb = qed_ll2_lb_txq_completion;
1458         } else {
1459                 comp_rx_cb = qed_ll2_rxq_completion;
1460                 comp_tx_cb = qed_ll2_txq_completion;
1461         }
1462
1463         if (data->input.rx_num_desc) {
1464                 qed_int_register_cb(p_hwfn, comp_rx_cb,
1465                                     &p_hwfn->p_ll2_info[i],
1466                                     &p_ll2_info->rx_queue.rx_sb_index,
1467                                     &p_ll2_info->rx_queue.p_fw_cons);
1468                 p_ll2_info->rx_queue.b_cb_registered = true;
1469         }
1470
1471         if (data->input.tx_num_desc) {
1472                 qed_int_register_cb(p_hwfn,
1473                                     comp_tx_cb,
1474                                     &p_hwfn->p_ll2_info[i],
1475                                     &p_ll2_info->tx_queue.tx_sb_index,
1476                                     &p_ll2_info->tx_queue.p_fw_cons);
1477                 p_ll2_info->tx_queue.b_cb_registered = true;
1478         }
1479
1480         *data->p_connection_handle = i;
1481         return rc;
1482
1483 q_allocate_fail:
1484         qed_ll2_release_connection(p_hwfn, i);
1485         return -ENOMEM;
1486 }
1487
1488 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn,
1489                                            struct qed_ll2_info *p_ll2_conn)
1490 {
1491         enum qed_ll2_error_handle error_input;
1492         enum core_error_handle error_mode;
1493         u8 action_on_error = 0;
1494         int rc;
1495
1496         if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
1497                 return 0;
1498
1499         DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0);
1500         error_input = p_ll2_conn->input.ai_err_packet_too_big;
1501         error_mode = qed_ll2_get_error_choice(error_input);
1502         SET_FIELD(action_on_error,
1503                   CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode);
1504         error_input = p_ll2_conn->input.ai_err_no_buf;
1505         error_mode = qed_ll2_get_error_choice(error_input);
1506         SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode);
1507
1508         rc = qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
1509         if (rc)
1510                 return rc;
1511
1512         if (p_ll2_conn->rx_queue.ctx_based) {
1513                 rc = qed_db_recovery_add(p_hwfn->cdev,
1514                                          p_ll2_conn->rx_queue.set_prod_addr,
1515                                          &p_ll2_conn->rx_queue.db_data,
1516                                          DB_REC_WIDTH_64B, DB_REC_KERNEL);
1517         }
1518
1519         return rc;
1520 }
1521
1522 static void
1523 qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn,
1524                                  struct qed_ll2_info *p_ll2_conn)
1525 {
1526         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
1527                 return;
1528
1529         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1530         qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
1531 }
1532
1533 static inline u8 qed_ll2_handle_to_queue_id(struct qed_hwfn *p_hwfn,
1534                                             u8 handle,
1535                                             u8 ll2_queue_type)
1536 {
1537         u8 qid;
1538
1539         if (ll2_queue_type == QED_LL2_RX_TYPE_LEGACY)
1540                 return p_hwfn->hw_info.resc_start[QED_LL2_RAM_QUEUE] + handle;
1541
1542         /* QED_LL2_RX_TYPE_CTX
1543          * FW distinguishes between the legacy queues (ram based) and the
1544          * ctx based queues by the queue_id.
1545          * The first MAX_NUM_LL2_RX_RAM_QUEUES queues are legacy
1546          * and the queue ids above that are ctx base.
1547          */
1548         qid = p_hwfn->hw_info.resc_start[QED_LL2_CTX_QUEUE] +
1549               MAX_NUM_LL2_RX_RAM_QUEUES;
1550
1551         /* See comment on the acquire connection for how the ll2
1552          * queues handles are divided.
1553          */
1554         qid += (handle - QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF);
1555
1556         return qid;
1557 }
1558
1559 int qed_ll2_establish_connection(void *cxt, u8 connection_handle)
1560 {
1561         struct core_conn_context *p_cxt;
1562         struct qed_ll2_tx_packet *p_pkt;
1563         struct qed_ll2_info *p_ll2_conn;
1564         struct qed_hwfn *p_hwfn = cxt;
1565         struct qed_ll2_rx_queue *p_rx;
1566         struct qed_ll2_tx_queue *p_tx;
1567         struct qed_cxt_info cxt_info;
1568         struct qed_ptt *p_ptt;
1569         int rc = -EINVAL;
1570         u32 i, capacity;
1571         size_t desc_size;
1572         u8 qid, stats_id;
1573
1574         p_ptt = qed_ptt_acquire(p_hwfn);
1575         if (!p_ptt)
1576                 return -EAGAIN;
1577
1578         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1579         if (!p_ll2_conn) {
1580                 rc = -EINVAL;
1581                 goto out;
1582         }
1583
1584         p_rx = &p_ll2_conn->rx_queue;
1585         p_tx = &p_ll2_conn->tx_queue;
1586
1587         qed_chain_reset(&p_rx->rxq_chain);
1588         qed_chain_reset(&p_rx->rcq_chain);
1589         INIT_LIST_HEAD(&p_rx->active_descq);
1590         INIT_LIST_HEAD(&p_rx->free_descq);
1591         INIT_LIST_HEAD(&p_rx->posting_descq);
1592         spin_lock_init(&p_rx->lock);
1593         capacity = qed_chain_get_capacity(&p_rx->rxq_chain);
1594         for (i = 0; i < capacity; i++)
1595                 list_add_tail(&p_rx->descq_array[i].list_entry,
1596                               &p_rx->free_descq);
1597         *p_rx->p_fw_cons = 0;
1598
1599         qed_chain_reset(&p_tx->txq_chain);
1600         INIT_LIST_HEAD(&p_tx->active_descq);
1601         INIT_LIST_HEAD(&p_tx->free_descq);
1602         INIT_LIST_HEAD(&p_tx->sending_descq);
1603         spin_lock_init(&p_tx->lock);
1604         capacity = qed_chain_get_capacity(&p_tx->txq_chain);
1605         /* All bds_set elements are flexibily added. */
1606         desc_size = struct_size(p_pkt, bds_set,
1607                                 p_ll2_conn->input.tx_max_bds_per_packet);
1608
1609         for (i = 0; i < capacity; i++) {
1610                 p_pkt = p_tx->descq_mem + desc_size * i;
1611                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
1612         }
1613         p_tx->cur_completing_bd_idx = 0;
1614         p_tx->bds_idx = 0;
1615         p_tx->b_completing_packet = false;
1616         p_tx->cur_send_packet = NULL;
1617         p_tx->cur_send_frag_num = 0;
1618         p_tx->cur_completing_frag_num = 0;
1619         *p_tx->p_fw_cons = 0;
1620
1621         rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
1622         if (rc)
1623                 goto out;
1624         cxt_info.iid = p_ll2_conn->cid;
1625         rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info);
1626         if (rc) {
1627                 DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n",
1628                           p_ll2_conn->cid);
1629                 goto out;
1630         }
1631
1632         p_cxt = cxt_info.p_cxt;
1633
1634         memset(p_cxt, 0, sizeof(*p_cxt));
1635
1636         qid = qed_ll2_handle_to_queue_id(p_hwfn, connection_handle,
1637                                          p_ll2_conn->input.rx_conn_type);
1638         stats_id = qed_ll2_handle_to_stats_id(p_hwfn,
1639                                               p_ll2_conn->input.rx_conn_type,
1640                                               qid);
1641         p_ll2_conn->queue_id = qid;
1642         p_ll2_conn->tx_stats_id = stats_id;
1643
1644         /* If there is no valid stats id for this connection, disable stats */
1645         if (p_ll2_conn->tx_stats_id == QED_LL2_INVALID_STATS_ID) {
1646                 p_ll2_conn->tx_stats_en = 0;
1647                 DP_VERBOSE(p_hwfn,
1648                            QED_MSG_LL2,
1649                            "Disabling stats for queue %d - not enough counters\n",
1650                            qid);
1651         }
1652
1653         DP_VERBOSE(p_hwfn,
1654                    QED_MSG_LL2,
1655                    "Establishing ll2 queue. PF %d ctx_based=%d abs qid=%d stats_id=%d\n",
1656                    p_hwfn->rel_pf_id,
1657                    p_ll2_conn->input.rx_conn_type, qid, stats_id);
1658
1659         if (p_ll2_conn->input.rx_conn_type == QED_LL2_RX_TYPE_LEGACY) {
1660                 p_rx->set_prod_addr =
1661                     (u8 __iomem *)p_hwfn->regview +
1662                     GET_GTT_REG_ADDR(GTT_BAR0_MAP_REG_TSDM_RAM,
1663                                      TSTORM_LL2_RX_PRODS, qid);
1664         } else {
1665                 /* QED_LL2_RX_TYPE_CTX - using doorbell */
1666                 p_rx->ctx_based = 1;
1667
1668                 p_rx->set_prod_addr = p_hwfn->doorbells +
1669                         p_hwfn->dpi_start_offset +
1670                         DB_ADDR_SHIFT(DQ_PWM_OFFSET_TCM_LL2_PROD_UPDATE);
1671
1672                 /* prepare db data */
1673                 p_rx->db_data.icid = cpu_to_le16((u16)p_ll2_conn->cid);
1674                 SET_FIELD(p_rx->db_data.params,
1675                           CORE_PWM_PROD_UPDATE_DATA_AGG_CMD, DB_AGG_CMD_SET);
1676                 SET_FIELD(p_rx->db_data.params,
1677                           CORE_PWM_PROD_UPDATE_DATA_RESERVED1, 0);
1678         }
1679
1680         p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells +
1681                                             qed_db_addr(p_ll2_conn->cid,
1682                                                         DQ_DEMS_LEGACY);
1683         /* prepare db data */
1684         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
1685         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
1686         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
1687                   DQ_XCM_CORE_TX_BD_PROD_CMD);
1688         p_tx->db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
1689
1690         rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
1691         if (rc)
1692                 goto out;
1693
1694         rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
1695         if (rc)
1696                 goto out;
1697
1698         if (!QED_IS_RDMA_PERSONALITY(p_hwfn) &&
1699             !QED_IS_NVMETCP_PERSONALITY(p_hwfn))
1700                 qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1);
1701
1702         qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn);
1703
1704         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1705                 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
1706                         qed_llh_add_protocol_filter(p_hwfn->cdev, 0,
1707                                                     QED_LLH_FILTER_ETHERTYPE,
1708                                                     ETH_P_FCOE, 0);
1709                 qed_llh_add_protocol_filter(p_hwfn->cdev, 0,
1710                                             QED_LLH_FILTER_ETHERTYPE,
1711                                             ETH_P_FIP, 0);
1712         }
1713
1714 out:
1715         qed_ptt_release(p_hwfn, p_ptt);
1716         return rc;
1717 }
1718
1719 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn,
1720                                              struct qed_ll2_rx_queue *p_rx,
1721                                              struct qed_ll2_rx_packet *p_curp)
1722 {
1723         struct qed_ll2_rx_packet *p_posting_packet = NULL;
1724         struct core_ll2_rx_prod rx_prod = { 0, 0 };
1725         bool b_notify_fw = false;
1726         u16 bd_prod, cq_prod;
1727
1728         /* This handles the flushing of already posted buffers */
1729         while (!list_empty(&p_rx->posting_descq)) {
1730                 p_posting_packet = list_first_entry(&p_rx->posting_descq,
1731                                                     struct qed_ll2_rx_packet,
1732                                                     list_entry);
1733                 list_move_tail(&p_posting_packet->list_entry,
1734                                &p_rx->active_descq);
1735                 b_notify_fw = true;
1736         }
1737
1738         /* This handles the supplied packet [if there is one] */
1739         if (p_curp) {
1740                 list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
1741                 b_notify_fw = true;
1742         }
1743
1744         if (!b_notify_fw)
1745                 return;
1746
1747         bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
1748         cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
1749         if (p_rx->ctx_based) {
1750                 /* update producer by giving a doorbell */
1751                 p_rx->db_data.prod.bd_prod = cpu_to_le16(bd_prod);
1752                 p_rx->db_data.prod.cqe_prod = cpu_to_le16(cq_prod);
1753                 /* Make sure chain element is updated before ringing the
1754                  * doorbell
1755                  */
1756                 dma_wmb();
1757                 DIRECT_REG_WR64(p_rx->set_prod_addr,
1758                                 *((u64 *)&p_rx->db_data));
1759         } else {
1760                 rx_prod.bd_prod = cpu_to_le16(bd_prod);
1761                 rx_prod.cqe_prod = cpu_to_le16(cq_prod);
1762
1763                 /* Make sure chain element is updated before ringing the
1764                  * doorbell
1765                  */
1766                 dma_wmb();
1767
1768                 DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
1769         }
1770 }
1771
1772 int qed_ll2_post_rx_buffer(void *cxt,
1773                            u8 connection_handle,
1774                            dma_addr_t addr,
1775                            u16 buf_len, void *cookie, u8 notify_fw)
1776 {
1777         struct qed_hwfn *p_hwfn = cxt;
1778         struct core_rx_bd_with_buff_len *p_curb = NULL;
1779         struct qed_ll2_rx_packet *p_curp = NULL;
1780         struct qed_ll2_info *p_ll2_conn;
1781         struct qed_ll2_rx_queue *p_rx;
1782         unsigned long flags;
1783         void *p_data;
1784         int rc = 0;
1785
1786         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1787         if (!p_ll2_conn)
1788                 return -EINVAL;
1789         p_rx = &p_ll2_conn->rx_queue;
1790         if (!p_rx->set_prod_addr)
1791                 return -EIO;
1792
1793         spin_lock_irqsave(&p_rx->lock, flags);
1794         if (!list_empty(&p_rx->free_descq))
1795                 p_curp = list_first_entry(&p_rx->free_descq,
1796                                           struct qed_ll2_rx_packet, list_entry);
1797         if (p_curp) {
1798                 if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
1799                     qed_chain_get_elem_left(&p_rx->rcq_chain)) {
1800                         p_data = qed_chain_produce(&p_rx->rxq_chain);
1801                         p_curb = (struct core_rx_bd_with_buff_len *)p_data;
1802                         qed_chain_produce(&p_rx->rcq_chain);
1803                 }
1804         }
1805
1806         /* If we're lacking entries, let's try to flush buffers to FW */
1807         if (!p_curp || !p_curb) {
1808                 rc = -EBUSY;
1809                 p_curp = NULL;
1810                 goto out_notify;
1811         }
1812
1813         /* We have an Rx packet we can fill */
1814         DMA_REGPAIR_LE(p_curb->addr, addr);
1815         p_curb->buff_length = cpu_to_le16(buf_len);
1816         p_curp->rx_buf_addr = addr;
1817         p_curp->cookie = cookie;
1818         p_curp->rxq_bd = p_curb;
1819         p_curp->buf_length = buf_len;
1820         list_del(&p_curp->list_entry);
1821
1822         /* Check if we only want to enqueue this packet without informing FW */
1823         if (!notify_fw) {
1824                 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
1825                 goto out;
1826         }
1827
1828 out_notify:
1829         qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
1830 out:
1831         spin_unlock_irqrestore(&p_rx->lock, flags);
1832         return rc;
1833 }
1834
1835 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
1836                                           struct qed_ll2_tx_queue *p_tx,
1837                                           struct qed_ll2_tx_packet *p_curp,
1838                                           struct qed_ll2_tx_pkt_info *pkt,
1839                                           u8 notify_fw)
1840 {
1841         list_del(&p_curp->list_entry);
1842         p_curp->cookie = pkt->cookie;
1843         p_curp->bd_used = pkt->num_of_bds;
1844         p_curp->notify_fw = notify_fw;
1845         p_tx->cur_send_packet = p_curp;
1846         p_tx->cur_send_frag_num = 0;
1847
1848         p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag;
1849         p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len;
1850         p_tx->cur_send_frag_num++;
1851 }
1852
1853 static void
1854 qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
1855                                  struct qed_ll2_info *p_ll2,
1856                                  struct qed_ll2_tx_packet *p_curp,
1857                                  struct qed_ll2_tx_pkt_info *pkt)
1858 {
1859         struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
1860         u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
1861         struct core_tx_bd *start_bd = NULL;
1862         enum core_roce_flavor_type roce_flavor;
1863         enum core_tx_dest tx_dest;
1864         u16 bd_data = 0, frag_idx;
1865         u16 bitfield1;
1866
1867         roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE
1868                                                              : CORE_RROCE;
1869
1870         switch (pkt->tx_dest) {
1871         case QED_LL2_TX_DEST_NW:
1872                 tx_dest = CORE_TX_DEST_NW;
1873                 break;
1874         case QED_LL2_TX_DEST_LB:
1875                 tx_dest = CORE_TX_DEST_LB;
1876                 break;
1877         case QED_LL2_TX_DEST_DROP:
1878                 tx_dest = CORE_TX_DEST_DROP;
1879                 break;
1880         default:
1881                 tx_dest = CORE_TX_DEST_LB;
1882                 break;
1883         }
1884
1885         start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1886         if (likely(QED_IS_IWARP_PERSONALITY(p_hwfn) &&
1887                    p_ll2->input.conn_type == QED_LL2_TYPE_OOO)) {
1888                 start_bd->nw_vlan_or_lb_echo =
1889                     cpu_to_le16(IWARP_LL2_IN_ORDER_TX_QUEUE);
1890         } else {
1891                 start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan);
1892                 if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
1893                     p_ll2->input.conn_type == QED_LL2_TYPE_FCOE)
1894                         pkt->remove_stag = true;
1895         }
1896
1897         bitfield1 = le16_to_cpu(start_bd->bitfield1);
1898         SET_FIELD(bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W, pkt->l4_hdr_offset_w);
1899         SET_FIELD(bitfield1, CORE_TX_BD_TX_DST, tx_dest);
1900         start_bd->bitfield1 = cpu_to_le16(bitfield1);
1901
1902         bd_data |= pkt->bd_flags;
1903         SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1);
1904         SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds);
1905         SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor);
1906         SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_CSUM, !!(pkt->enable_ip_cksum));
1907         SET_FIELD(bd_data, CORE_TX_BD_DATA_L4_CSUM, !!(pkt->enable_l4_cksum));
1908         SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_LEN, !!(pkt->calc_ip_len));
1909         SET_FIELD(bd_data, CORE_TX_BD_DATA_DISABLE_STAG_INSERTION,
1910                   !!(pkt->remove_stag));
1911
1912         start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data);
1913         DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag);
1914         start_bd->nbytes = cpu_to_le16(pkt->first_frag_len);
1915
1916         DP_VERBOSE(p_hwfn,
1917                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1918                    "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",
1919                    p_ll2->queue_id,
1920                    p_ll2->cid,
1921                    p_ll2->input.conn_type,
1922                    prod_idx,
1923                    pkt->first_frag_len,
1924                    pkt->num_of_bds,
1925                    le32_to_cpu(start_bd->addr.hi),
1926                    le32_to_cpu(start_bd->addr.lo));
1927
1928         if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds)
1929                 return;
1930
1931         /* Need to provide the packet with additional BDs for frags */
1932         for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
1933              frag_idx < pkt->num_of_bds; frag_idx++) {
1934                 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
1935
1936                 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1937                 (*p_bd)->bd_data.as_bitfield = 0;
1938                 (*p_bd)->bitfield1 = 0;
1939                 p_curp->bds_set[frag_idx].tx_frag = 0;
1940                 p_curp->bds_set[frag_idx].frag_len = 0;
1941         }
1942 }
1943
1944 /* This should be called while the Txq spinlock is being held */
1945 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
1946                                      struct qed_ll2_info *p_ll2_conn)
1947 {
1948         bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
1949         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1950         struct qed_ll2_tx_packet *p_pkt = NULL;
1951         u16 bd_prod;
1952
1953         /* If there are missing BDs, don't do anything now */
1954         if (p_ll2_conn->tx_queue.cur_send_frag_num !=
1955             p_ll2_conn->tx_queue.cur_send_packet->bd_used)
1956                 return;
1957
1958         /* Push the current packet to the list and clean after it */
1959         list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
1960                       &p_ll2_conn->tx_queue.sending_descq);
1961         p_ll2_conn->tx_queue.cur_send_packet = NULL;
1962         p_ll2_conn->tx_queue.cur_send_frag_num = 0;
1963
1964         /* Notify FW of packet only if requested to */
1965         if (!b_notify)
1966                 return;
1967
1968         bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
1969
1970         while (!list_empty(&p_tx->sending_descq)) {
1971                 p_pkt = list_first_entry(&p_tx->sending_descq,
1972                                          struct qed_ll2_tx_packet, list_entry);
1973                 if (!p_pkt)
1974                         break;
1975
1976                 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq);
1977         }
1978
1979         p_tx->db_msg.spq_prod = cpu_to_le16(bd_prod);
1980
1981         /* Make sure the BDs data is updated before ringing the doorbell */
1982         wmb();
1983
1984         DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&p_tx->db_msg));
1985
1986         DP_VERBOSE(p_hwfn,
1987                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1988                    "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
1989                    p_ll2_conn->queue_id,
1990                    p_ll2_conn->cid,
1991                    p_ll2_conn->input.conn_type, p_tx->db_msg.spq_prod);
1992 }
1993
1994 int qed_ll2_prepare_tx_packet(void *cxt,
1995                               u8 connection_handle,
1996                               struct qed_ll2_tx_pkt_info *pkt,
1997                               bool notify_fw)
1998 {
1999         struct qed_hwfn *p_hwfn = cxt;
2000         struct qed_ll2_tx_packet *p_curp = NULL;
2001         struct qed_ll2_info *p_ll2_conn = NULL;
2002         struct qed_ll2_tx_queue *p_tx;
2003         struct qed_chain *p_tx_chain;
2004         unsigned long flags;
2005         int rc = 0;
2006
2007         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2008         if (unlikely(!p_ll2_conn))
2009                 return -EINVAL;
2010         p_tx = &p_ll2_conn->tx_queue;
2011         p_tx_chain = &p_tx->txq_chain;
2012
2013         if (unlikely(pkt->num_of_bds > p_ll2_conn->input.tx_max_bds_per_packet))
2014                 return -EIO;
2015
2016         spin_lock_irqsave(&p_tx->lock, flags);
2017         if (unlikely(p_tx->cur_send_packet)) {
2018                 rc = -EEXIST;
2019                 goto out;
2020         }
2021
2022         /* Get entry, but only if we have tx elements for it */
2023         if (unlikely(!list_empty(&p_tx->free_descq)))
2024                 p_curp = list_first_entry(&p_tx->free_descq,
2025                                           struct qed_ll2_tx_packet, list_entry);
2026         if (unlikely(p_curp &&
2027                      qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds))
2028                 p_curp = NULL;
2029
2030         if (unlikely(!p_curp)) {
2031                 rc = -EBUSY;
2032                 goto out;
2033         }
2034
2035         /* Prepare packet and BD, and perhaps send a doorbell to FW */
2036         qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw);
2037
2038         qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt);
2039
2040         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
2041
2042 out:
2043         spin_unlock_irqrestore(&p_tx->lock, flags);
2044         return rc;
2045 }
2046
2047 int qed_ll2_set_fragment_of_tx_packet(void *cxt,
2048                                       u8 connection_handle,
2049                                       dma_addr_t addr, u16 nbytes)
2050 {
2051         struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
2052         struct qed_hwfn *p_hwfn = cxt;
2053         struct qed_ll2_info *p_ll2_conn = NULL;
2054         u16 cur_send_frag_num = 0;
2055         struct core_tx_bd *p_bd;
2056         unsigned long flags;
2057
2058         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2059         if (unlikely(!p_ll2_conn))
2060                 return -EINVAL;
2061
2062         if (unlikely(!p_ll2_conn->tx_queue.cur_send_packet))
2063                 return -EINVAL;
2064
2065         p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
2066         cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
2067
2068         if (unlikely(cur_send_frag_num >= p_cur_send_packet->bd_used))
2069                 return -EINVAL;
2070
2071         /* Fill the BD information, and possibly notify FW */
2072         p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
2073         DMA_REGPAIR_LE(p_bd->addr, addr);
2074         p_bd->nbytes = cpu_to_le16(nbytes);
2075         p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
2076         p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
2077
2078         p_ll2_conn->tx_queue.cur_send_frag_num++;
2079
2080         spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
2081         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
2082         spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
2083
2084         return 0;
2085 }
2086
2087 int qed_ll2_terminate_connection(void *cxt, u8 connection_handle)
2088 {
2089         struct qed_hwfn *p_hwfn = cxt;
2090         struct qed_ll2_info *p_ll2_conn = NULL;
2091         int rc = -EINVAL;
2092         struct qed_ptt *p_ptt;
2093
2094         p_ptt = qed_ptt_acquire(p_hwfn);
2095         if (!p_ptt)
2096                 return -EAGAIN;
2097
2098         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
2099         if (!p_ll2_conn) {
2100                 rc = -EINVAL;
2101                 goto out;
2102         }
2103
2104         /* Stop Tx & Rx of connection, if needed */
2105         if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
2106                 p_ll2_conn->tx_queue.b_cb_registered = false;
2107                 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
2108                 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
2109                 if (rc)
2110                         goto out;
2111
2112                 qed_ll2_txq_flush(p_hwfn, connection_handle);
2113                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
2114         }
2115
2116         if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
2117                 p_ll2_conn->rx_queue.b_cb_registered = false;
2118                 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
2119
2120                 if (p_ll2_conn->rx_queue.ctx_based)
2121                         qed_db_recovery_del(p_hwfn->cdev,
2122                                             p_ll2_conn->rx_queue.set_prod_addr,
2123                                             &p_ll2_conn->rx_queue.db_data);
2124
2125                 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
2126                 if (rc)
2127                         goto out;
2128
2129                 qed_ll2_rxq_flush(p_hwfn, connection_handle);
2130                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
2131         }
2132
2133         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
2134                 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
2135
2136         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
2137                 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
2138                         qed_llh_remove_protocol_filter(p_hwfn->cdev, 0,
2139                                                        QED_LLH_FILTER_ETHERTYPE,
2140                                                        ETH_P_FCOE, 0);
2141                 qed_llh_remove_protocol_filter(p_hwfn->cdev, 0,
2142                                                QED_LLH_FILTER_ETHERTYPE,
2143                                                ETH_P_FIP, 0);
2144         }
2145
2146 out:
2147         qed_ptt_release(p_hwfn, p_ptt);
2148         return rc;
2149 }
2150
2151 static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn,
2152                                            struct qed_ll2_info *p_ll2_conn)
2153 {
2154         struct qed_ooo_buffer *p_buffer;
2155
2156         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
2157                 return;
2158
2159         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
2160         while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
2161                                                    p_hwfn->p_ooo_info))) {
2162                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
2163                                   p_buffer->rx_buffer_size,
2164                                   p_buffer->rx_buffer_virt_addr,
2165                                   p_buffer->rx_buffer_phys_addr);
2166                 kfree(p_buffer);
2167         }
2168 }
2169
2170 void qed_ll2_release_connection(void *cxt, u8 connection_handle)
2171 {
2172         struct qed_hwfn *p_hwfn = cxt;
2173         struct qed_ll2_info *p_ll2_conn = NULL;
2174
2175         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2176         if (!p_ll2_conn)
2177                 return;
2178
2179         kfree(p_ll2_conn->tx_queue.descq_mem);
2180         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
2181
2182         kfree(p_ll2_conn->rx_queue.descq_array);
2183         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
2184         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
2185
2186         qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
2187
2188         qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn);
2189
2190         mutex_lock(&p_ll2_conn->mutex);
2191         p_ll2_conn->b_active = false;
2192         mutex_unlock(&p_ll2_conn->mutex);
2193 }
2194
2195 int qed_ll2_alloc(struct qed_hwfn *p_hwfn)
2196 {
2197         struct qed_ll2_info *p_ll2_connections;
2198         u8 i;
2199
2200         /* Allocate LL2's set struct */
2201         p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
2202                                     sizeof(struct qed_ll2_info), GFP_KERNEL);
2203         if (!p_ll2_connections) {
2204                 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
2205                 return -ENOMEM;
2206         }
2207
2208         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2209                 p_ll2_connections[i].my_id = i;
2210
2211         p_hwfn->p_ll2_info = p_ll2_connections;
2212         return 0;
2213 }
2214
2215 void qed_ll2_setup(struct qed_hwfn *p_hwfn)
2216 {
2217         int i;
2218
2219         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2220                 mutex_init(&p_hwfn->p_ll2_info[i].mutex);
2221 }
2222
2223 void qed_ll2_free(struct qed_hwfn *p_hwfn)
2224 {
2225         if (!p_hwfn->p_ll2_info)
2226                 return;
2227
2228         kfree(p_hwfn->p_ll2_info);
2229         p_hwfn->p_ll2_info = NULL;
2230 }
2231
2232 static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn,
2233                                     struct qed_ptt *p_ptt,
2234                                     struct qed_ll2_stats *p_stats)
2235 {
2236         struct core_ll2_port_stats port_stats;
2237
2238         memset(&port_stats, 0, sizeof(port_stats));
2239         qed_memcpy_from(p_hwfn, p_ptt, &port_stats,
2240                         BAR0_MAP_REG_TSDM_RAM +
2241                         TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)),
2242                         sizeof(port_stats));
2243
2244         p_stats->gsi_invalid_hdr += HILO_64_REGPAIR(port_stats.gsi_invalid_hdr);
2245         p_stats->gsi_invalid_pkt_length +=
2246             HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length);
2247         p_stats->gsi_unsupported_pkt_typ +=
2248             HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ);
2249         p_stats->gsi_crcchksm_error +=
2250             HILO_64_REGPAIR(port_stats.gsi_crcchksm_error);
2251 }
2252
2253 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,
2254                                 struct qed_ptt *p_ptt,
2255                                 struct qed_ll2_info *p_ll2_conn,
2256                                 struct qed_ll2_stats *p_stats)
2257 {
2258         struct core_ll2_tstorm_per_queue_stat tstats;
2259         u8 qid = p_ll2_conn->queue_id;
2260         u32 tstats_addr;
2261
2262         memset(&tstats, 0, sizeof(tstats));
2263         tstats_addr = BAR0_MAP_REG_TSDM_RAM +
2264                       CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
2265         qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
2266
2267         p_stats->packet_too_big_discard +=
2268                         HILO_64_REGPAIR(tstats.packet_too_big_discard);
2269         p_stats->no_buff_discard += HILO_64_REGPAIR(tstats.no_buff_discard);
2270 }
2271
2272 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
2273                                 struct qed_ptt *p_ptt,
2274                                 struct qed_ll2_info *p_ll2_conn,
2275                                 struct qed_ll2_stats *p_stats)
2276 {
2277         struct core_ll2_ustorm_per_queue_stat ustats;
2278         u8 qid = p_ll2_conn->queue_id;
2279         u32 ustats_addr;
2280
2281         memset(&ustats, 0, sizeof(ustats));
2282         ustats_addr = BAR0_MAP_REG_USDM_RAM +
2283                       CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
2284         qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
2285
2286         p_stats->rcv_ucast_bytes += HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
2287         p_stats->rcv_mcast_bytes += HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
2288         p_stats->rcv_bcast_bytes += HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
2289         p_stats->rcv_ucast_pkts += HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
2290         p_stats->rcv_mcast_pkts += HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
2291         p_stats->rcv_bcast_pkts += HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
2292 }
2293
2294 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
2295                                 struct qed_ptt *p_ptt,
2296                                 struct qed_ll2_info *p_ll2_conn,
2297                                 struct qed_ll2_stats *p_stats)
2298 {
2299         struct core_ll2_pstorm_per_queue_stat pstats;
2300         u8 stats_id = p_ll2_conn->tx_stats_id;
2301         u32 pstats_addr;
2302
2303         memset(&pstats, 0, sizeof(pstats));
2304         pstats_addr = BAR0_MAP_REG_PSDM_RAM +
2305                       CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
2306         qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
2307
2308         p_stats->sent_ucast_bytes += HILO_64_REGPAIR(pstats.sent_ucast_bytes);
2309         p_stats->sent_mcast_bytes += HILO_64_REGPAIR(pstats.sent_mcast_bytes);
2310         p_stats->sent_bcast_bytes += HILO_64_REGPAIR(pstats.sent_bcast_bytes);
2311         p_stats->sent_ucast_pkts += HILO_64_REGPAIR(pstats.sent_ucast_pkts);
2312         p_stats->sent_mcast_pkts += HILO_64_REGPAIR(pstats.sent_mcast_pkts);
2313         p_stats->sent_bcast_pkts += HILO_64_REGPAIR(pstats.sent_bcast_pkts);
2314 }
2315
2316 static int __qed_ll2_get_stats(void *cxt, u8 connection_handle,
2317                                struct qed_ll2_stats *p_stats)
2318 {
2319         struct qed_hwfn *p_hwfn = cxt;
2320         struct qed_ll2_info *p_ll2_conn = NULL;
2321         struct qed_ptt *p_ptt;
2322
2323         if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
2324             !p_hwfn->p_ll2_info)
2325                 return -EINVAL;
2326
2327         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
2328
2329         p_ptt = qed_ptt_acquire(p_hwfn);
2330         if (!p_ptt) {
2331                 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
2332                 return -EINVAL;
2333         }
2334
2335         if (p_ll2_conn->input.gsi_enable)
2336                 _qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats);
2337
2338         _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2339
2340         _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2341
2342         if (p_ll2_conn->tx_stats_en)
2343                 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2344
2345         qed_ptt_release(p_hwfn, p_ptt);
2346
2347         return 0;
2348 }
2349
2350 int qed_ll2_get_stats(void *cxt,
2351                       u8 connection_handle, struct qed_ll2_stats *p_stats)
2352 {
2353         memset(p_stats, 0, sizeof(*p_stats));
2354         return __qed_ll2_get_stats(cxt, connection_handle, p_stats);
2355 }
2356
2357 static void qed_ll2b_release_rx_packet(void *cxt,
2358                                        u8 connection_handle,
2359                                        void *cookie,
2360                                        dma_addr_t rx_buf_addr,
2361                                        bool b_last_packet)
2362 {
2363         struct qed_hwfn *p_hwfn = cxt;
2364
2365         qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie);
2366 }
2367
2368 static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
2369                                     const struct qed_ll2_cb_ops *ops,
2370                                     void *cookie)
2371 {
2372         cdev->ll2->cbs = ops;
2373         cdev->ll2->cb_cookie = cookie;
2374 }
2375
2376 static struct qed_ll2_cbs ll2_cbs = {
2377         .rx_comp_cb = &qed_ll2b_complete_rx_packet,
2378         .rx_release_cb = &qed_ll2b_release_rx_packet,
2379         .tx_comp_cb = &qed_ll2b_complete_tx_packet,
2380         .tx_release_cb = &qed_ll2b_complete_tx_packet,
2381 };
2382
2383 static void qed_ll2_set_conn_data(struct qed_hwfn *p_hwfn,
2384                                   struct qed_ll2_acquire_data *data,
2385                                   struct qed_ll2_params *params,
2386                                   enum qed_ll2_conn_type conn_type,
2387                                   u8 *handle, bool lb)
2388 {
2389         memset(data, 0, sizeof(*data));
2390
2391         data->input.conn_type = conn_type;
2392         data->input.mtu = params->mtu;
2393         data->input.rx_num_desc = QED_LL2_RX_SIZE;
2394         data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets;
2395         data->input.rx_vlan_removal_en = params->rx_vlan_stripping;
2396         data->input.tx_num_desc = QED_LL2_TX_SIZE;
2397         data->p_connection_handle = handle;
2398         data->cbs = &ll2_cbs;
2399         ll2_cbs.cookie = p_hwfn;
2400
2401         if (lb) {
2402                 data->input.tx_tc = PKT_LB_TC;
2403                 data->input.tx_dest = QED_LL2_TX_DEST_LB;
2404         } else {
2405                 data->input.tx_tc = 0;
2406                 data->input.tx_dest = QED_LL2_TX_DEST_NW;
2407         }
2408 }
2409
2410 static int qed_ll2_start_ooo(struct qed_hwfn *p_hwfn,
2411                              struct qed_ll2_params *params)
2412 {
2413         u8 *handle = &p_hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
2414         struct qed_ll2_acquire_data data;
2415         int rc;
2416
2417         qed_ll2_set_conn_data(p_hwfn, &data, params,
2418                               QED_LL2_TYPE_OOO, handle, true);
2419
2420         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2421         if (rc) {
2422                 DP_INFO(p_hwfn, "Failed to acquire LL2 OOO connection\n");
2423                 goto out;
2424         }
2425
2426         rc = qed_ll2_establish_connection(p_hwfn, *handle);
2427         if (rc) {
2428                 DP_INFO(p_hwfn, "Failed to establish LL2 OOO connection\n");
2429                 goto fail;
2430         }
2431
2432         return 0;
2433
2434 fail:
2435         qed_ll2_release_connection(p_hwfn, *handle);
2436 out:
2437         *handle = QED_LL2_UNUSED_HANDLE;
2438         return rc;
2439 }
2440
2441 static bool qed_ll2_is_storage_eng1(struct qed_dev *cdev)
2442 {
2443         return (QED_IS_FCOE_PERSONALITY(QED_LEADING_HWFN(cdev)) ||
2444                 QED_IS_ISCSI_PERSONALITY(QED_LEADING_HWFN(cdev)) ||
2445                 QED_IS_NVMETCP_PERSONALITY(QED_LEADING_HWFN(cdev))) &&
2446                 (QED_AFFIN_HWFN(cdev) != QED_LEADING_HWFN(cdev));
2447 }
2448
2449 static int __qed_ll2_stop(struct qed_hwfn *p_hwfn)
2450 {
2451         struct qed_dev *cdev = p_hwfn->cdev;
2452         int rc;
2453
2454         rc = qed_ll2_terminate_connection(p_hwfn, cdev->ll2->handle);
2455         if (rc)
2456                 DP_INFO(cdev, "Failed to terminate LL2 connection\n");
2457
2458         qed_ll2_release_connection(p_hwfn, cdev->ll2->handle);
2459
2460         return rc;
2461 }
2462
2463 static int qed_ll2_stop(struct qed_dev *cdev)
2464 {
2465         bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2466         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2467         int rc = 0, rc2 = 0;
2468
2469         if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
2470                 return 0;
2471         if (!QED_IS_NVMETCP_PERSONALITY(p_hwfn))
2472                 qed_llh_remove_mac_filter(cdev, 0, cdev->ll2_mac_address);
2473
2474         qed_llh_remove_mac_filter(cdev, 0, cdev->ll2_mac_address);
2475         eth_zero_addr(cdev->ll2_mac_address);
2476
2477         if (QED_IS_ISCSI_PERSONALITY(p_hwfn) || QED_IS_NVMETCP_PERSONALITY(p_hwfn))
2478                 qed_ll2_stop_ooo(p_hwfn);
2479
2480         /* In CMT mode, LL2 is always started on engine 0 for a storage PF */
2481         if (b_is_storage_eng1) {
2482                 rc2 = __qed_ll2_stop(QED_LEADING_HWFN(cdev));
2483                 if (rc2)
2484                         DP_NOTICE(QED_LEADING_HWFN(cdev),
2485                                   "Failed to stop LL2 on engine 0\n");
2486         }
2487
2488         rc = __qed_ll2_stop(p_hwfn);
2489         if (rc)
2490                 DP_NOTICE(p_hwfn, "Failed to stop LL2\n");
2491
2492         qed_ll2_kill_buffers(cdev);
2493
2494         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2495
2496         return rc | rc2;
2497 }
2498
2499 static int __qed_ll2_start(struct qed_hwfn *p_hwfn,
2500                            struct qed_ll2_params *params)
2501 {
2502         struct qed_ll2_buffer *buffer, *tmp_buffer;
2503         struct qed_dev *cdev = p_hwfn->cdev;
2504         enum qed_ll2_conn_type conn_type;
2505         struct qed_ll2_acquire_data data;
2506         int rc, rx_cnt;
2507
2508         switch (p_hwfn->hw_info.personality) {
2509         case QED_PCI_FCOE:
2510                 conn_type = QED_LL2_TYPE_FCOE;
2511                 break;
2512         case QED_PCI_ISCSI:
2513         case QED_PCI_NVMETCP:
2514                 conn_type = QED_LL2_TYPE_TCP_ULP;
2515                 break;
2516         case QED_PCI_ETH_ROCE:
2517                 conn_type = QED_LL2_TYPE_ROCE;
2518                 break;
2519         default:
2520
2521                 conn_type = QED_LL2_TYPE_TEST;
2522         }
2523
2524         qed_ll2_set_conn_data(p_hwfn, &data, params, conn_type,
2525                               &cdev->ll2->handle, false);
2526
2527         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2528         if (rc) {
2529                 DP_INFO(p_hwfn, "Failed to acquire LL2 connection\n");
2530                 return rc;
2531         }
2532
2533         rc = qed_ll2_establish_connection(p_hwfn, cdev->ll2->handle);
2534         if (rc) {
2535                 DP_INFO(p_hwfn, "Failed to establish LL2 connection\n");
2536                 goto release_conn;
2537         }
2538
2539         /* Post all Rx buffers to FW */
2540         spin_lock_bh(&cdev->ll2->lock);
2541         rx_cnt = cdev->ll2->rx_cnt;
2542         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) {
2543                 rc = qed_ll2_post_rx_buffer(p_hwfn,
2544                                             cdev->ll2->handle,
2545                                             buffer->phys_addr, 0, buffer, 1);
2546                 if (rc) {
2547                         DP_INFO(p_hwfn,
2548                                 "Failed to post an Rx buffer; Deleting it\n");
2549                         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
2550                                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
2551                         kfree(buffer->data);
2552                         list_del(&buffer->list);
2553                         kfree(buffer);
2554                 } else {
2555                         rx_cnt++;
2556                 }
2557         }
2558         spin_unlock_bh(&cdev->ll2->lock);
2559
2560         if (rx_cnt == cdev->ll2->rx_cnt) {
2561                 DP_NOTICE(p_hwfn, "Failed passing even a single Rx buffer\n");
2562                 goto terminate_conn;
2563         }
2564         cdev->ll2->rx_cnt = rx_cnt;
2565
2566         return 0;
2567
2568 terminate_conn:
2569         qed_ll2_terminate_connection(p_hwfn, cdev->ll2->handle);
2570 release_conn:
2571         qed_ll2_release_connection(p_hwfn, cdev->ll2->handle);
2572         return rc;
2573 }
2574
2575 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
2576 {
2577         bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2578         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2579         struct qed_ll2_buffer *buffer;
2580         int rx_num_desc, i, rc;
2581
2582         if (!is_valid_ether_addr(params->ll2_mac_address)) {
2583                 DP_NOTICE(cdev, "Invalid Ethernet address\n");
2584                 return -EINVAL;
2585         }
2586
2587         WARN_ON(!cdev->ll2->cbs);
2588
2589         /* Initialize LL2 locks & lists */
2590         INIT_LIST_HEAD(&cdev->ll2->list);
2591         spin_lock_init(&cdev->ll2->lock);
2592
2593         cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
2594                              L1_CACHE_BYTES + params->mtu;
2595
2596         /* Allocate memory for LL2.
2597          * In CMT mode, in case of a storage PF which is affintized to engine 1,
2598          * LL2 is started also on engine 0 and thus we need twofold buffers.
2599          */
2600         rx_num_desc = QED_LL2_RX_SIZE * (b_is_storage_eng1 ? 2 : 1);
2601         DP_INFO(cdev, "Allocating %d LL2 buffers of size %08x bytes\n",
2602                 rx_num_desc, cdev->ll2->rx_size);
2603         for (i = 0; i < rx_num_desc; i++) {
2604                 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2605                 if (!buffer) {
2606                         DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
2607                         rc = -ENOMEM;
2608                         goto err0;
2609                 }
2610
2611                 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
2612                                           &buffer->phys_addr);
2613                 if (rc) {
2614                         kfree(buffer);
2615                         goto err0;
2616                 }
2617
2618                 list_add_tail(&buffer->list, &cdev->ll2->list);
2619         }
2620
2621         rc = __qed_ll2_start(p_hwfn, params);
2622         if (rc) {
2623                 DP_NOTICE(cdev, "Failed to start LL2\n");
2624                 goto err0;
2625         }
2626
2627         /* In CMT mode, always need to start LL2 on engine 0 for a storage PF,
2628          * since broadcast/mutlicast packets are routed to engine 0.
2629          */
2630         if (b_is_storage_eng1) {
2631                 rc = __qed_ll2_start(QED_LEADING_HWFN(cdev), params);
2632                 if (rc) {
2633                         DP_NOTICE(QED_LEADING_HWFN(cdev),
2634                                   "Failed to start LL2 on engine 0\n");
2635                         goto err1;
2636                 }
2637         }
2638
2639         if (QED_IS_ISCSI_PERSONALITY(p_hwfn) || QED_IS_NVMETCP_PERSONALITY(p_hwfn)) {
2640                 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n");
2641                 rc = qed_ll2_start_ooo(p_hwfn, params);
2642                 if (rc) {
2643                         DP_NOTICE(cdev, "Failed to start OOO LL2\n");
2644                         goto err2;
2645                 }
2646         }
2647
2648         if (!QED_IS_NVMETCP_PERSONALITY(p_hwfn)) {
2649                 rc = qed_llh_add_mac_filter(cdev, 0, params->ll2_mac_address);
2650                 if (rc) {
2651                         DP_NOTICE(cdev, "Failed to add an LLH filter\n");
2652                         goto err3;
2653                 }
2654         }
2655
2656         ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
2657
2658         return 0;
2659
2660 err3:
2661         if (QED_IS_ISCSI_PERSONALITY(p_hwfn) || QED_IS_NVMETCP_PERSONALITY(p_hwfn))
2662                 qed_ll2_stop_ooo(p_hwfn);
2663 err2:
2664         if (b_is_storage_eng1)
2665                 __qed_ll2_stop(QED_LEADING_HWFN(cdev));
2666 err1:
2667         __qed_ll2_stop(p_hwfn);
2668 err0:
2669         qed_ll2_kill_buffers(cdev);
2670         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2671         return rc;
2672 }
2673
2674 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb,
2675                               unsigned long xmit_flags)
2676 {
2677         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2678         struct qed_ll2_tx_pkt_info pkt;
2679         const skb_frag_t *frag;
2680         u8 flags = 0, nr_frags;
2681         int rc = -EINVAL, i;
2682         dma_addr_t mapping;
2683         u16 vlan = 0;
2684
2685         if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
2686                 DP_INFO(cdev, "Cannot transmit a checksummed packet\n");
2687                 return -EINVAL;
2688         }
2689
2690         /* Cache number of fragments from SKB since SKB may be freed by
2691          * the completion routine after calling qed_ll2_prepare_tx_packet()
2692          */
2693         nr_frags = skb_shinfo(skb)->nr_frags;
2694
2695         if (unlikely(1 + nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET)) {
2696                 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
2697                        1 + nr_frags);
2698                 return -EINVAL;
2699         }
2700
2701         mapping = dma_map_single(&cdev->pdev->dev, skb->data,
2702                                  skb->len, DMA_TO_DEVICE);
2703         if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2704                 DP_NOTICE(cdev, "SKB mapping failed\n");
2705                 return -EINVAL;
2706         }
2707
2708         /* Request HW to calculate IP csum */
2709         if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
2710               ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
2711                 flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT);
2712
2713         if (skb_vlan_tag_present(skb)) {
2714                 vlan = skb_vlan_tag_get(skb);
2715                 flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT);
2716         }
2717
2718         memset(&pkt, 0, sizeof(pkt));
2719         pkt.num_of_bds = 1 + nr_frags;
2720         pkt.vlan = vlan;
2721         pkt.bd_flags = flags;
2722         pkt.tx_dest = QED_LL2_TX_DEST_NW;
2723         pkt.first_frag = mapping;
2724         pkt.first_frag_len = skb->len;
2725         pkt.cookie = skb;
2726         if (test_bit(QED_MF_UFP_SPECIFIC, &cdev->mf_bits) &&
2727             test_bit(QED_LL2_XMIT_FLAGS_FIP_DISCOVERY, &xmit_flags))
2728                 pkt.remove_stag = true;
2729
2730         /* qed_ll2_prepare_tx_packet() may actually send the packet if
2731          * there are no fragments in the skb and subsequently the completion
2732          * routine may run and free the SKB, so no dereferencing the SKB
2733          * beyond this point unless skb has any fragments.
2734          */
2735         rc = qed_ll2_prepare_tx_packet(p_hwfn, cdev->ll2->handle,
2736                                        &pkt, 1);
2737         if (unlikely(rc))
2738                 goto err;
2739
2740         for (i = 0; i < nr_frags; i++) {
2741                 frag = &skb_shinfo(skb)->frags[i];
2742
2743                 mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0,
2744                                            skb_frag_size(frag), DMA_TO_DEVICE);
2745
2746                 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2747                         DP_NOTICE(cdev,
2748                                   "Unable to map frag - dropping packet\n");
2749                         rc = -ENOMEM;
2750                         goto err;
2751                 }
2752
2753                 rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn,
2754                                                        cdev->ll2->handle,
2755                                                        mapping,
2756                                                        skb_frag_size(frag));
2757
2758                 /* if failed not much to do here, partial packet has been posted
2759                  * we can't free memory, will need to wait for completion
2760                  */
2761                 if (unlikely(rc))
2762                         goto err2;
2763         }
2764
2765         return 0;
2766
2767 err:
2768         dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE);
2769 err2:
2770         return rc;
2771 }
2772
2773 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats)
2774 {
2775         bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2776         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2777         int rc;
2778
2779         if (!cdev->ll2)
2780                 return -EINVAL;
2781
2782         rc = qed_ll2_get_stats(p_hwfn, cdev->ll2->handle, stats);
2783         if (rc) {
2784                 DP_NOTICE(p_hwfn, "Failed to get LL2 stats\n");
2785                 return rc;
2786         }
2787
2788         /* In CMT mode, LL2 is always started on engine 0 for a storage PF */
2789         if (b_is_storage_eng1) {
2790                 rc = __qed_ll2_get_stats(QED_LEADING_HWFN(cdev),
2791                                          cdev->ll2->handle, stats);
2792                 if (rc) {
2793                         DP_NOTICE(QED_LEADING_HWFN(cdev),
2794                                   "Failed to get LL2 stats on engine 0\n");
2795                         return rc;
2796                 }
2797         }
2798
2799         return 0;
2800 }
2801
2802 const struct qed_ll2_ops qed_ll2_ops_pass = {
2803         .start = &qed_ll2_start,
2804         .stop = &qed_ll2_stop,
2805         .start_xmit = &qed_ll2_start_xmit,
2806         .register_cb_ops = &qed_ll2_register_cb_ops,
2807         .get_stats = &qed_ll2_stats,
2808 };
2809
2810 int qed_ll2_alloc_if(struct qed_dev *cdev)
2811 {
2812         cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL);
2813         return cdev->ll2 ? 0 : -ENOMEM;
2814 }
2815
2816 void qed_ll2_dealloc_if(struct qed_dev *cdev)
2817 {
2818         kfree(cdev->ll2);
2819         cdev->ll2 = NULL;
2820 }