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

   1 /* QLogic qed NIC Driver
   2  * Copyright (c) 2015-2017  QLogic Corporation
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and /or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <linux/types.h>
  34 #include <asm/byteorder.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/if_vlan.h>
  37 #include <linux/kernel.h>
  38 #include <linux/pci.h>
  39 #include <linux/slab.h>
  40 #include <linux/stddef.h>
  41 #include <linux/workqueue.h>
  42 #include <net/ipv6.h>
  43 #include <linux/bitops.h>
  44 #include <linux/delay.h>
  45 #include <linux/errno.h>
  46 #include <linux/etherdevice.h>
  47 #include <linux/io.h>
  48 #include <linux/list.h>
  49 #include <linux/mutex.h>
  50 #include <linux/spinlock.h>
  51 #include <linux/string.h>
  52 #include <linux/qed/qed_ll2_if.h>
  53 #include "qed.h"
  54 #include "qed_cxt.h"
  55 #include "qed_dev_api.h"
  56 #include "qed_hsi.h"
  57 #include "qed_hw.h"
  58 #include "qed_int.h"
  59 #include "qed_ll2.h"
  60 #include "qed_mcp.h"
  61 #include "qed_ooo.h"
  62 #include "qed_reg_addr.h"
  63 #include "qed_sp.h"
  64 #include "qed_rdma.h"
  65
  66 #define QED_LL2_RX_REGISTERED(ll2)      ((ll2)->rx_queue.b_cb_registered)
  67 #define QED_LL2_TX_REGISTERED(ll2)      ((ll2)->tx_queue.b_cb_registered)
  68
  69 #define QED_LL2_TX_SIZE (256)
  70 #define QED_LL2_RX_SIZE (4096)
  71
  72 struct qed_cb_ll2_info {
  73         int rx_cnt;
  74         u32 rx_size;
  75         u8 handle;
  76
  77         /* Lock protecting LL2 buffer lists in sleepless context */
  78         spinlock_t lock;
  79         struct list_head list;
  80
  81         const struct qed_ll2_cb_ops *cbs;
  82         void *cb_cookie;
  83 };
  84
  85 struct qed_ll2_buffer {
  86         struct list_head list;
  87         void *data;
  88         dma_addr_t phys_addr;
  89 };
  90
  91 static void qed_ll2b_complete_tx_packet(void *cxt,
  92                                         u8 connection_handle,
  93                                         void *cookie,
  94                                         dma_addr_t first_frag_addr,
  95                                         bool b_last_fragment,
  96                                         bool b_last_packet)
  97 {
  98         struct qed_hwfn *p_hwfn = cxt;
  99         struct qed_dev *cdev = p_hwfn->cdev;
 100         struct sk_buff *skb = cookie;
 101
 102         /* All we need to do is release the mapping */
 103         dma_unmap_single(&p_hwfn->cdev->pdev->dev, first_frag_addr,
 104                          skb_headlen(skb), DMA_TO_DEVICE);
 105
 106         if (cdev->ll2->cbs && cdev->ll2->cbs->tx_cb)
 107                 cdev->ll2->cbs->tx_cb(cdev->ll2->cb_cookie, skb,
 108                                       b_last_fragment);
 109
 110         dev_kfree_skb_any(skb);
 111 }
 112
 113 static int qed_ll2_alloc_buffer(struct qed_dev *cdev,
 114                                 u8 **data, dma_addr_t *phys_addr)
 115 {
 116         *data = kmalloc(cdev->ll2->rx_size, GFP_ATOMIC);
 117         if (!(*data)) {
 118                 DP_INFO(cdev, "Failed to allocate LL2 buffer data\n");
 119                 return -ENOMEM;
 120         }
 121
 122         *phys_addr = dma_map_single(&cdev->pdev->dev,
 123                                     ((*data) + NET_SKB_PAD),
 124                                     cdev->ll2->rx_size, DMA_FROM_DEVICE);
 125         if (dma_mapping_error(&cdev->pdev->dev, *phys_addr)) {
 126                 DP_INFO(cdev, "Failed to map LL2 buffer data\n");
 127                 kfree((*data));
 128                 return -ENOMEM;
 129         }
 130
 131         return 0;
 132 }
 133
 134 static int qed_ll2_dealloc_buffer(struct qed_dev *cdev,
 135                                  struct qed_ll2_buffer *buffer)
 136 {
 137         spin_lock_bh(&cdev->ll2->lock);
 138
 139         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
 140                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
 141         kfree(buffer->data);
 142         list_del(&buffer->list);
 143
 144         cdev->ll2->rx_cnt--;
 145         if (!cdev->ll2->rx_cnt)
 146                 DP_INFO(cdev, "All LL2 entries were removed\n");
 147
 148         spin_unlock_bh(&cdev->ll2->lock);
 149
 150         return 0;
 151 }
 152
 153 static void qed_ll2_kill_buffers(struct qed_dev *cdev)
 154 {
 155         struct qed_ll2_buffer *buffer, *tmp_buffer;
 156
 157         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list)
 158                 qed_ll2_dealloc_buffer(cdev, buffer);
 159 }
 160
 161 static void qed_ll2b_complete_rx_packet(void *cxt,
 162                                         struct qed_ll2_comp_rx_data *data)
 163 {
 164         struct qed_hwfn *p_hwfn = cxt;
 165         struct qed_ll2_buffer *buffer = data->cookie;
 166         struct qed_dev *cdev = p_hwfn->cdev;
 167         dma_addr_t new_phys_addr;
 168         struct sk_buff *skb;
 169         bool reuse = false;
 170         int rc = -EINVAL;
 171         u8 *new_data;
 172
 173         DP_VERBOSE(p_hwfn,
 174                    (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA),
 175                    "Got an LL2 Rx completion: [Buffer at phys 0x%llx, offset 0x%02x] Length 0x%04x Parse_flags 0x%04x vlan 0x%04x Opaque data [0x%08x:0x%08x]\n",
 176                    (u64)data->rx_buf_addr,
 177                    data->u.placement_offset,
 178                    data->length.packet_length,
 179                    data->parse_flags,
 180                    data->vlan, data->opaque_data_0, data->opaque_data_1);
 181
 182         if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) {
 183                 print_hex_dump(KERN_INFO, "",
 184                                DUMP_PREFIX_OFFSET, 16, 1,
 185                                buffer->data, data->length.packet_length, false);
 186         }
 187
 188         /* Determine if data is valid */
 189         if (data->length.packet_length < ETH_HLEN)
 190                 reuse = true;
 191
 192         /* Allocate a replacement for buffer; Reuse upon failure */
 193         if (!reuse)
 194                 rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data,
 195                                           &new_phys_addr);
 196
 197         /* If need to reuse or there's no replacement buffer, repost this */
 198         if (rc)
 199                 goto out_post;
 200         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
 201                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
 202
 203         skb = build_skb(buffer->data, 0);
 204         if (!skb) {
 205                 DP_INFO(cdev, "Failed to build SKB\n");
 206                 kfree(buffer->data);
 207                 goto out_post1;
 208         }
 209
 210         data->u.placement_offset += NET_SKB_PAD;
 211         skb_reserve(skb, data->u.placement_offset);
 212         skb_put(skb, data->length.packet_length);
 213         skb_checksum_none_assert(skb);
 214
 215         /* Get parital ethernet information instead of eth_type_trans(),
 216          * Since we don't have an associated net_device.
 217          */
 218         skb_reset_mac_header(skb);
 219         skb->protocol = eth_hdr(skb)->h_proto;
 220
 221         /* Pass SKB onward */
 222         if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) {
 223                 if (data->vlan)
 224                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 225                                                data->vlan);
 226                 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb,
 227                                       data->opaque_data_0,
 228                                       data->opaque_data_1);
 229         } else {
 230                 DP_VERBOSE(p_hwfn, (NETIF_MSG_RX_STATUS | NETIF_MSG_PKTDATA |
 231                                     QED_MSG_LL2 | QED_MSG_STORAGE),
 232                            "Dropping the packet\n");
 233                 kfree(buffer->data);
 234         }
 235
 236 out_post1:
 237         /* Update Buffer information and update FW producer */
 238         buffer->data = new_data;
 239         buffer->phys_addr = new_phys_addr;
 240
 241 out_post:
 242         rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), cdev->ll2->handle,
 243                                     buffer->phys_addr, 0,  buffer, 1);
 244
 245         if (rc)
 246                 qed_ll2_dealloc_buffer(cdev, buffer);
 247 }
 248
 249 static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 250                                                     u8 connection_handle,
 251                                                     bool b_lock,
 252                                                     bool b_only_active)
 253 {
 254         struct qed_ll2_info *p_ll2_conn, *p_ret = NULL;
 255
 256         if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS)
 257                 return NULL;
 258
 259         if (!p_hwfn->p_ll2_info)
 260                 return NULL;
 261
 262         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
 263
 264         if (b_only_active) {
 265                 if (b_lock)
 266                         mutex_lock(&p_ll2_conn->mutex);
 267                 if (p_ll2_conn->b_active)
 268                         p_ret = p_ll2_conn;
 269                 if (b_lock)
 270                         mutex_unlock(&p_ll2_conn->mutex);
 271         } else {
 272                 p_ret = p_ll2_conn;
 273         }
 274
 275         return p_ret;
 276 }
 277
 278 static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 279                                                   u8 connection_handle)
 280 {
 281         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true);
 282 }
 283
 284 static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn,
 285                                                        u8 connection_handle)
 286 {
 287         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true);
 288 }
 289
 290 static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn
 291                                                            *p_hwfn,
 292                                                            u8 connection_handle)
 293 {
 294         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false);
 295 }
 296
 297 static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 298 {
 299         bool b_last_packet = false, b_last_frag = false;
 300         struct qed_ll2_tx_packet *p_pkt = NULL;
 301         struct qed_ll2_info *p_ll2_conn;
 302         struct qed_ll2_tx_queue *p_tx;
 303         unsigned long flags = 0;
 304         dma_addr_t tx_frag;
 305
 306         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 307         if (!p_ll2_conn)
 308                 return;
 309
 310         p_tx = &p_ll2_conn->tx_queue;
 311
 312         spin_lock_irqsave(&p_tx->lock, flags);
 313         while (!list_empty(&p_tx->active_descq)) {
 314                 p_pkt = list_first_entry(&p_tx->active_descq,
 315                                          struct qed_ll2_tx_packet, list_entry);
 316                 if (!p_pkt)
 317                         break;
 318
 319                 list_del(&p_pkt->list_entry);
 320                 b_last_packet = list_empty(&p_tx->active_descq);
 321                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 322                 spin_unlock_irqrestore(&p_tx->lock, flags);
 323                 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
 324                         struct qed_ooo_buffer *p_buffer;
 325
 326                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 327                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 328                                                 p_buffer);
 329                 } else {
 330                         p_tx->cur_completing_packet = *p_pkt;
 331                         p_tx->cur_completing_bd_idx = 1;
 332                         b_last_frag =
 333                                 p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 334                         tx_frag = p_pkt->bds_set[0].tx_frag;
 335                         p_ll2_conn->cbs.tx_release_cb(p_ll2_conn->cbs.cookie,
 336                                                       p_ll2_conn->my_id,
 337                                                       p_pkt->cookie,
 338                                                       tx_frag,
 339                                                       b_last_frag,
 340                                                       b_last_packet);
 341                 }
 342                 spin_lock_irqsave(&p_tx->lock, flags);
 343         }
 344         spin_unlock_irqrestore(&p_tx->lock, flags);
 345 }
 346
 347 static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 348 {
 349         struct qed_ll2_info *p_ll2_conn = p_cookie;
 350         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 351         u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0;
 352         struct qed_ll2_tx_packet *p_pkt;
 353         bool b_last_frag = false;
 354         unsigned long flags;
 355         int rc = -EINVAL;
 356
 357         spin_lock_irqsave(&p_tx->lock, flags);
 358         if (p_tx->b_completing_packet) {
 359                 rc = -EBUSY;
 360                 goto out;
 361         }
 362
 363         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 364         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 365         while (num_bds) {
 366                 if (list_empty(&p_tx->active_descq))
 367                         goto out;
 368
 369                 p_pkt = list_first_entry(&p_tx->active_descq,
 370                                          struct qed_ll2_tx_packet, list_entry);
 371                 if (!p_pkt)
 372                         goto out;
 373
 374                 p_tx->b_completing_packet = true;
 375                 p_tx->cur_completing_packet = *p_pkt;
 376                 num_bds_in_packet = p_pkt->bd_used;
 377                 list_del(&p_pkt->list_entry);
 378
 379                 if (num_bds < num_bds_in_packet) {
 380                         DP_NOTICE(p_hwfn,
 381                                   "Rest of BDs does not cover whole packet\n");
 382                         goto out;
 383                 }
 384
 385                 num_bds -= num_bds_in_packet;
 386                 p_tx->bds_idx += num_bds_in_packet;
 387                 while (num_bds_in_packet--)
 388                         qed_chain_consume(&p_tx->txq_chain);
 389
 390                 p_tx->cur_completing_bd_idx = 1;
 391                 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 392                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 393
 394                 spin_unlock_irqrestore(&p_tx->lock, flags);
 395
 396                 p_ll2_conn->cbs.tx_comp_cb(p_ll2_conn->cbs.cookie,
 397                                            p_ll2_conn->my_id,
 398                                            p_pkt->cookie,
 399                                            p_pkt->bds_set[0].tx_frag,
 400                                            b_last_frag, !num_bds);
 401
 402                 spin_lock_irqsave(&p_tx->lock, flags);
 403         }
 404
 405         p_tx->b_completing_packet = false;
 406         rc = 0;
 407 out:
 408         spin_unlock_irqrestore(&p_tx->lock, flags);
 409         return rc;
 410 }
 411
 412 static void qed_ll2_rxq_parse_gsi(struct qed_hwfn *p_hwfn,
 413                                   union core_rx_cqe_union *p_cqe,
 414                                   struct qed_ll2_comp_rx_data *data)
 415 {
 416         data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags);
 417         data->length.data_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length);
 418         data->vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan);
 419         data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi);
 420         data->opaque_data_1 = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo);
 421         data->u.data_length_error = p_cqe->rx_cqe_gsi.data_length_error;
 422         data->qp_id = le16_to_cpu(p_cqe->rx_cqe_gsi.qp_id);
 423
 424         data->src_qp = le32_to_cpu(p_cqe->rx_cqe_gsi.src_qp);
 425 }
 426
 427 static void qed_ll2_rxq_parse_reg(struct qed_hwfn *p_hwfn,
 428                                   union core_rx_cqe_union *p_cqe,
 429                                   struct qed_ll2_comp_rx_data *data)
 430 {
 431         data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_fp.parse_flags.flags);
 432         data->err_flags = le16_to_cpu(p_cqe->rx_cqe_fp.err_flags.flags);
 433         data->length.packet_length =
 434             le16_to_cpu(p_cqe->rx_cqe_fp.packet_length);
 435         data->vlan = le16_to_cpu(p_cqe->rx_cqe_fp.vlan);
 436         data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[0]);
 437         data->opaque_data_1 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[1]);
 438         data->u.placement_offset = p_cqe->rx_cqe_fp.placement_offset;
 439 }
 440
 441 static int
 442 qed_ll2_handle_slowpath(struct qed_hwfn *p_hwfn,
 443                         struct qed_ll2_info *p_ll2_conn,
 444                         union core_rx_cqe_union *p_cqe,
 445                         unsigned long *p_lock_flags)
 446 {
 447         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 448         struct core_rx_slow_path_cqe *sp_cqe;
 449
 450         sp_cqe = &p_cqe->rx_cqe_sp;
 451         if (sp_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) {
 452                 DP_NOTICE(p_hwfn,
 453                           "LL2 - unexpected Rx CQE slowpath ramrod_cmd_id:%d\n",
 454                           sp_cqe->ramrod_cmd_id);
 455                 return -EINVAL;
 456         }
 457
 458         if (!p_ll2_conn->cbs.slowpath_cb) {
 459                 DP_NOTICE(p_hwfn,
 460                           "LL2 - received RX_QUEUE_FLUSH but no callback was provided\n");
 461                 return -EINVAL;
 462         }
 463
 464         spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
 465
 466         p_ll2_conn->cbs.slowpath_cb(p_ll2_conn->cbs.cookie,
 467                                     p_ll2_conn->my_id,
 468                                     le32_to_cpu(sp_cqe->opaque_data.data[0]),
 469                                     le32_to_cpu(sp_cqe->opaque_data.data[1]));
 470
 471         spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
 472
 473         return 0;
 474 }
 475
 476 static int
 477 qed_ll2_rxq_handle_completion(struct qed_hwfn *p_hwfn,
 478                               struct qed_ll2_info *p_ll2_conn,
 479                               union core_rx_cqe_union *p_cqe,
 480                               unsigned long *p_lock_flags, bool b_last_cqe)
 481 {
 482         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 483         struct qed_ll2_rx_packet *p_pkt = NULL;
 484         struct qed_ll2_comp_rx_data data;
 485
 486         if (!list_empty(&p_rx->active_descq))
 487                 p_pkt = list_first_entry(&p_rx->active_descq,
 488                                          struct qed_ll2_rx_packet, list_entry);
 489         if (!p_pkt) {
 490                 DP_NOTICE(p_hwfn,
 491                           "[%d] LL2 Rx completion but active_descq is empty\n",
 492                           p_ll2_conn->input.conn_type);
 493
 494                 return -EIO;
 495         }
 496         list_del(&p_pkt->list_entry);
 497
 498         if (p_cqe->rx_cqe_sp.type == CORE_RX_CQE_TYPE_REGULAR)
 499                 qed_ll2_rxq_parse_reg(p_hwfn, p_cqe, &data);
 500         else
 501                 qed_ll2_rxq_parse_gsi(p_hwfn, p_cqe, &data);
 502         if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)
 503                 DP_NOTICE(p_hwfn,
 504                           "Mismatch between active_descq and the LL2 Rx chain\n");
 505
 506         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 507
 508         data.connection_handle = p_ll2_conn->my_id;
 509         data.cookie = p_pkt->cookie;
 510         data.rx_buf_addr = p_pkt->rx_buf_addr;
 511         data.b_last_packet = b_last_cqe;
 512
 513         spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
 514         p_ll2_conn->cbs.rx_comp_cb(p_ll2_conn->cbs.cookie, &data);
 515
 516         spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
 517
 518         return 0;
 519 }
 520
 521 static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie)
 522 {
 523         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)cookie;
 524         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 525         union core_rx_cqe_union *cqe = NULL;
 526         u16 cq_new_idx = 0, cq_old_idx = 0;
 527         unsigned long flags = 0;
 528         int rc = 0;
 529
 530         spin_lock_irqsave(&p_rx->lock, flags);
 531         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 532         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 533
 534         while (cq_new_idx != cq_old_idx) {
 535                 bool b_last_cqe = (cq_new_idx == cq_old_idx);
 536
 537                 cqe =
 538                     (union core_rx_cqe_union *)
 539                     qed_chain_consume(&p_rx->rcq_chain);
 540                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 541
 542                 DP_VERBOSE(p_hwfn,
 543                            QED_MSG_LL2,
 544                            "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n",
 545                            cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type);
 546
 547                 switch (cqe->rx_cqe_sp.type) {
 548                 case CORE_RX_CQE_TYPE_SLOW_PATH:
 549                         rc = qed_ll2_handle_slowpath(p_hwfn, p_ll2_conn,
 550                                                      cqe, &flags);
 551                         break;
 552                 case CORE_RX_CQE_TYPE_GSI_OFFLOAD:
 553                 case CORE_RX_CQE_TYPE_REGULAR:
 554                         rc = qed_ll2_rxq_handle_completion(p_hwfn, p_ll2_conn,
 555                                                            cqe, &flags,
 556                                                            b_last_cqe);
 557                         break;
 558                 default:
 559                         rc = -EIO;
 560                 }
 561         }
 562
 563         spin_unlock_irqrestore(&p_rx->lock, flags);
 564         return rc;
 565 }
 566
 567 static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 568 {
 569         struct qed_ll2_info *p_ll2_conn = NULL;
 570         struct qed_ll2_rx_packet *p_pkt = NULL;
 571         struct qed_ll2_rx_queue *p_rx;
 572         unsigned long flags = 0;
 573
 574         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 575         if (!p_ll2_conn)
 576                 return;
 577
 578         p_rx = &p_ll2_conn->rx_queue;
 579
 580         spin_lock_irqsave(&p_rx->lock, flags);
 581         while (!list_empty(&p_rx->active_descq)) {
 582                 p_pkt = list_first_entry(&p_rx->active_descq,
 583                                          struct qed_ll2_rx_packet, list_entry);
 584                 if (!p_pkt)
 585                         break;
 586                 list_move_tail(&p_pkt->list_entry, &p_rx->free_descq);
 587                 spin_unlock_irqrestore(&p_rx->lock, flags);
 588
 589                 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
 590                         struct qed_ooo_buffer *p_buffer;
 591
 592                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 593                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 594                                                 p_buffer);
 595                 } else {
 596                         dma_addr_t rx_buf_addr = p_pkt->rx_buf_addr;
 597                         void *cookie = p_pkt->cookie;
 598                         bool b_last;
 599
 600                         b_last = list_empty(&p_rx->active_descq);
 601                         p_ll2_conn->cbs.rx_release_cb(p_ll2_conn->cbs.cookie,
 602                                                       p_ll2_conn->my_id,
 603                                                       cookie,
 604                                                       rx_buf_addr, b_last);
 605                 }
 606                 spin_lock_irqsave(&p_rx->lock, flags);
 607         }
 608         spin_unlock_irqrestore(&p_rx->lock, flags);
 609 }
 610
 611 static bool
 612 qed_ll2_lb_rxq_handler_slowpath(struct qed_hwfn *p_hwfn,
 613                                 struct core_rx_slow_path_cqe *p_cqe)
 614 {
 615         struct ooo_opaque *iscsi_ooo;
 616         u32 cid;
 617
 618         if (p_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH)
 619                 return false;
 620
 621         iscsi_ooo = (struct ooo_opaque *)&p_cqe->opaque_data;
 622         if (iscsi_ooo->ooo_opcode != TCP_EVENT_DELETE_ISLES)
 623                 return false;
 624
 625         /* Need to make a flush */
 626         cid = le32_to_cpu(iscsi_ooo->cid);
 627         qed_ooo_release_connection_isles(p_hwfn, p_hwfn->p_ooo_info, cid);
 628
 629         return true;
 630 }
 631
 632 static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn,
 633                                   struct qed_ll2_info *p_ll2_conn)
 634 {
 635         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 636         u16 packet_length = 0, parse_flags = 0, vlan = 0;
 637         struct qed_ll2_rx_packet *p_pkt = NULL;
 638         u32 num_ooo_add_to_peninsula = 0, cid;
 639         union core_rx_cqe_union *cqe = NULL;
 640         u16 cq_new_idx = 0, cq_old_idx = 0;
 641         struct qed_ooo_buffer *p_buffer;
 642         struct ooo_opaque *iscsi_ooo;
 643         u8 placement_offset = 0;
 644         u8 cqe_type;
 645
 646         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 647         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 648         if (cq_new_idx == cq_old_idx)
 649                 return 0;
 650
 651         while (cq_new_idx != cq_old_idx) {
 652                 struct core_rx_fast_path_cqe *p_cqe_fp;
 653
 654                 cqe = qed_chain_consume(&p_rx->rcq_chain);
 655                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 656                 cqe_type = cqe->rx_cqe_sp.type;
 657
 658                 if (cqe_type == CORE_RX_CQE_TYPE_SLOW_PATH)
 659                         if (qed_ll2_lb_rxq_handler_slowpath(p_hwfn,
 660                                                             &cqe->rx_cqe_sp))
 661                                 continue;
 662
 663                 if (cqe_type != CORE_RX_CQE_TYPE_REGULAR) {
 664                         DP_NOTICE(p_hwfn,
 665                                   "Got a non-regular LB LL2 completion [type 0x%02x]\n",
 666                                   cqe_type);
 667                         return -EINVAL;
 668                 }
 669                 p_cqe_fp = &cqe->rx_cqe_fp;
 670
 671                 placement_offset = p_cqe_fp->placement_offset;
 672                 parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags);
 673                 packet_length = le16_to_cpu(p_cqe_fp->packet_length);
 674                 vlan = le16_to_cpu(p_cqe_fp->vlan);
 675                 iscsi_ooo = (struct ooo_opaque *)&p_cqe_fp->opaque_data;
 676                 qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info,
 677                                            iscsi_ooo);
 678                 cid = le32_to_cpu(iscsi_ooo->cid);
 679
 680                 /* Process delete isle first */
 681                 if (iscsi_ooo->drop_size)
 682                         qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid,
 683                                              iscsi_ooo->drop_isle,
 684                                              iscsi_ooo->drop_size);
 685
 686                 if (iscsi_ooo->ooo_opcode == TCP_EVENT_NOP)
 687                         continue;
 688
 689                 /* Now process create/add/join isles */
 690                 if (list_empty(&p_rx->active_descq)) {
 691                         DP_NOTICE(p_hwfn,
 692                                   "LL2 OOO RX chain has no submitted buffers\n"
 693                                   );
 694                         return -EIO;
 695                 }
 696
 697                 p_pkt = list_first_entry(&p_rx->active_descq,
 698                                          struct qed_ll2_rx_packet, list_entry);
 699
 700                 if ((iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE) ||
 701                     (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT) ||
 702                     (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT) ||
 703                     (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_PEN) ||
 704                     (iscsi_ooo->ooo_opcode == TCP_EVENT_JOIN)) {
 705                         if (!p_pkt) {
 706                                 DP_NOTICE(p_hwfn,
 707                                           "LL2 OOO RX packet is not valid\n");
 708                                 return -EIO;
 709                         }
 710                         list_del(&p_pkt->list_entry);
 711                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 712                         p_buffer->packet_length = packet_length;
 713                         p_buffer->parse_flags = parse_flags;
 714                         p_buffer->vlan = vlan;
 715                         p_buffer->placement_offset = placement_offset;
 716                         qed_chain_consume(&p_rx->rxq_chain);
 717                         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 718
 719                         switch (iscsi_ooo->ooo_opcode) {
 720                         case TCP_EVENT_ADD_NEW_ISLE:
 721                                 qed_ooo_add_new_isle(p_hwfn,
 722                                                      p_hwfn->p_ooo_info,
 723                                                      cid,
 724                                                      iscsi_ooo->ooo_isle,
 725                                                      p_buffer);
 726                                 break;
 727                         case TCP_EVENT_ADD_ISLE_RIGHT:
 728                                 qed_ooo_add_new_buffer(p_hwfn,
 729                                                        p_hwfn->p_ooo_info,
 730                                                        cid,
 731                                                        iscsi_ooo->ooo_isle,
 732                                                        p_buffer,
 733                                                        QED_OOO_RIGHT_BUF);
 734                                 break;
 735                         case TCP_EVENT_ADD_ISLE_LEFT:
 736                                 qed_ooo_add_new_buffer(p_hwfn,
 737                                                        p_hwfn->p_ooo_info,
 738                                                        cid,
 739                                                        iscsi_ooo->ooo_isle,
 740                                                        p_buffer,
 741                                                        QED_OOO_LEFT_BUF);
 742                                 break;
 743                         case TCP_EVENT_JOIN:
 744                                 qed_ooo_add_new_buffer(p_hwfn,
 745                                                        p_hwfn->p_ooo_info,
 746                                                        cid,
 747                                                        iscsi_ooo->ooo_isle +
 748                                                        1,
 749                                                        p_buffer,
 750                                                        QED_OOO_LEFT_BUF);
 751                                 qed_ooo_join_isles(p_hwfn,
 752                                                    p_hwfn->p_ooo_info,
 753                                                    cid, iscsi_ooo->ooo_isle);
 754                                 break;
 755                         case TCP_EVENT_ADD_PEN:
 756                                 num_ooo_add_to_peninsula++;
 757                                 qed_ooo_put_ready_buffer(p_hwfn,
 758                                                          p_hwfn->p_ooo_info,
 759                                                          p_buffer, true);
 760                                 break;
 761                         }
 762                 } else {
 763                         DP_NOTICE(p_hwfn,
 764                                   "Unexpected event (%d) TX OOO completion\n",
 765                                   iscsi_ooo->ooo_opcode);
 766                 }
 767         }
 768
 769         return 0;
 770 }
 771
 772 static void
 773 qed_ooo_submit_tx_buffers(struct qed_hwfn *p_hwfn,
 774                           struct qed_ll2_info *p_ll2_conn)
 775 {
 776         struct qed_ll2_tx_pkt_info tx_pkt;
 777         struct qed_ooo_buffer *p_buffer;
 778         u16 l4_hdr_offset_w;
 779         dma_addr_t first_frag;
 780         u8 bd_flags;
 781         int rc;
 782
 783         /* Submit Tx buffers here */
 784         while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn,
 785                                                     p_hwfn->p_ooo_info))) {
 786                 l4_hdr_offset_w = 0;
 787                 bd_flags = 0;
 788
 789                 first_frag = p_buffer->rx_buffer_phys_addr +
 790                              p_buffer->placement_offset;
 791                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_FORCE_VLAN_MODE, 1);
 792                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_L4_PROTOCOL, 1);
 793
 794                 memset(&tx_pkt, 0, sizeof(tx_pkt));
 795                 tx_pkt.num_of_bds = 1;
 796                 tx_pkt.vlan = p_buffer->vlan;
 797                 tx_pkt.bd_flags = bd_flags;
 798                 tx_pkt.l4_hdr_offset_w = l4_hdr_offset_w;
 799                 switch (p_ll2_conn->tx_dest) {
 800                 case CORE_TX_DEST_NW:
 801                         tx_pkt.tx_dest = QED_LL2_TX_DEST_NW;
 802                         break;
 803                 case CORE_TX_DEST_LB:
 804                         tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
 805                         break;
 806                 case CORE_TX_DEST_DROP:
 807                 default:
 808                         tx_pkt.tx_dest = QED_LL2_TX_DEST_DROP;
 809                         break;
 810                 }
 811                 tx_pkt.first_frag = first_frag;
 812                 tx_pkt.first_frag_len = p_buffer->packet_length;
 813                 tx_pkt.cookie = p_buffer;
 814
 815                 rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id,
 816                                                &tx_pkt, true);
 817                 if (rc) {
 818                         qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info,
 819                                                  p_buffer, false);
 820                         break;
 821                 }
 822         }
 823 }
 824
 825 static void
 826 qed_ooo_submit_rx_buffers(struct qed_hwfn *p_hwfn,
 827                           struct qed_ll2_info *p_ll2_conn)
 828 {
 829         struct qed_ooo_buffer *p_buffer;
 830         int rc;
 831
 832         while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
 833                                                    p_hwfn->p_ooo_info))) {
 834                 rc = qed_ll2_post_rx_buffer(p_hwfn,
 835                                             p_ll2_conn->my_id,
 836                                             p_buffer->rx_buffer_phys_addr,
 837                                             0, p_buffer, true);
 838                 if (rc) {
 839                         qed_ooo_put_free_buffer(p_hwfn,
 840                                                 p_hwfn->p_ooo_info, p_buffer);
 841                         break;
 842                 }
 843         }
 844 }
 845
 846 static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 847 {
 848         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
 849         int rc;
 850
 851         if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
 852                 return 0;
 853
 854         rc = qed_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn);
 855         if (rc)
 856                 return rc;
 857
 858         qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
 859         qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
 860
 861         return 0;
 862 }
 863
 864 static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 865 {
 866         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
 867         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 868         struct qed_ll2_tx_packet *p_pkt = NULL;
 869         struct qed_ooo_buffer *p_buffer;
 870         bool b_dont_submit_rx = false;
 871         u16 new_idx = 0, num_bds = 0;
 872         int rc;
 873
 874         if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
 875                 return 0;
 876
 877         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 878         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 879
 880         if (!num_bds)
 881                 return 0;
 882
 883         while (num_bds) {
 884                 if (list_empty(&p_tx->active_descq))
 885                         return -EINVAL;
 886
 887                 p_pkt = list_first_entry(&p_tx->active_descq,
 888                                          struct qed_ll2_tx_packet, list_entry);
 889                 if (!p_pkt)
 890                         return -EINVAL;
 891
 892                 if (p_pkt->bd_used != 1) {
 893                         DP_NOTICE(p_hwfn,
 894                                   "Unexpectedly many BDs(%d) in TX OOO completion\n",
 895                                   p_pkt->bd_used);
 896                         return -EINVAL;
 897                 }
 898
 899                 list_del(&p_pkt->list_entry);
 900
 901                 num_bds--;
 902                 p_tx->bds_idx++;
 903                 qed_chain_consume(&p_tx->txq_chain);
 904
 905                 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 906                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 907
 908                 if (b_dont_submit_rx) {
 909                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 910                                                 p_buffer);
 911                         continue;
 912                 }
 913
 914                 rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id,
 915                                             p_buffer->rx_buffer_phys_addr, 0,
 916                                             p_buffer, true);
 917                 if (rc != 0) {
 918                         qed_ooo_put_free_buffer(p_hwfn,
 919                                                 p_hwfn->p_ooo_info, p_buffer);
 920                         b_dont_submit_rx = true;
 921                 }
 922         }
 923
 924         qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
 925
 926         return 0;
 927 }
 928
 929 static void qed_ll2_stop_ooo(struct qed_dev *cdev)
 930 {
 931         struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
 932         u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
 933
 934         DP_VERBOSE(cdev, QED_MSG_STORAGE, "Stopping LL2 OOO queue [%02x]\n",
 935                    *handle);
 936
 937         qed_ll2_terminate_connection(hwfn, *handle);
 938         qed_ll2_release_connection(hwfn, *handle);
 939         *handle = QED_LL2_UNUSED_HANDLE;
 940 }
 941
 942 static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn,
 943                                      struct qed_ll2_info *p_ll2_conn,
 944                                      u8 action_on_error)
 945 {
 946         enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
 947         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 948         struct core_rx_start_ramrod_data *p_ramrod = NULL;
 949         struct qed_spq_entry *p_ent = NULL;
 950         struct qed_sp_init_data init_data;
 951         u16 cqe_pbl_size;
 952         int rc = 0;
 953
 954         /* Get SPQ entry */
 955         memset(&init_data, 0, sizeof(init_data));
 956         init_data.cid = p_ll2_conn->cid;
 957         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 958         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 959
 960         rc = qed_sp_init_request(p_hwfn, &p_ent,
 961                                  CORE_RAMROD_RX_QUEUE_START,
 962                                  PROTOCOLID_CORE, &init_data);
 963         if (rc)
 964                 return rc;
 965
 966         p_ramrod = &p_ent->ramrod.core_rx_queue_start;
 967
 968         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
 969         p_ramrod->sb_index = p_rx->rx_sb_index;
 970         p_ramrod->complete_event_flg = 1;
 971
 972         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
 973         DMA_REGPAIR_LE(p_ramrod->bd_base, p_rx->rxq_chain.p_phys_addr);
 974         cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain);
 975         p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size);
 976         DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr,
 977                        qed_chain_get_pbl_phys(&p_rx->rcq_chain));
 978
 979         p_ramrod->drop_ttl0_flg = p_ll2_conn->input.rx_drop_ttl0_flg;
 980         p_ramrod->inner_vlan_stripping_en =
 981                 p_ll2_conn->input.rx_vlan_removal_en;
 982
 983         if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
 984             p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE)
 985                 p_ramrod->report_outer_vlan = 1;
 986         p_ramrod->queue_id = p_ll2_conn->queue_id;
 987         p_ramrod->main_func_queue = p_ll2_conn->main_func_queue ? 1 : 0;
 988
 989         if (test_bit(QED_MF_LL2_NON_UNICAST, &p_hwfn->cdev->mf_bits) &&
 990             p_ramrod->main_func_queue && conn_type != QED_LL2_TYPE_ROCE &&
 991             conn_type != QED_LL2_TYPE_IWARP) {
 992                 p_ramrod->mf_si_bcast_accept_all = 1;
 993                 p_ramrod->mf_si_mcast_accept_all = 1;
 994         } else {
 995                 p_ramrod->mf_si_bcast_accept_all = 0;
 996                 p_ramrod->mf_si_mcast_accept_all = 0;
 997         }
 998
 999         p_ramrod->action_on_error.error_type = action_on_error;
1000         p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1001         return qed_spq_post(p_hwfn, p_ent, NULL);
1002 }
1003
1004 static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
1005                                      struct qed_ll2_info *p_ll2_conn)
1006 {
1007         enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
1008         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1009         struct core_tx_start_ramrod_data *p_ramrod = NULL;
1010         struct qed_spq_entry *p_ent = NULL;
1011         struct qed_sp_init_data init_data;
1012         u16 pq_id = 0, pbl_size;
1013         int rc = -EINVAL;
1014
1015         if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
1016                 return 0;
1017
1018         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
1019                 p_ll2_conn->tx_stats_en = 0;
1020         else
1021                 p_ll2_conn->tx_stats_en = 1;
1022
1023         /* Get SPQ entry */
1024         memset(&init_data, 0, sizeof(init_data));
1025         init_data.cid = p_ll2_conn->cid;
1026         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1027         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1028
1029         rc = qed_sp_init_request(p_hwfn, &p_ent,
1030                                  CORE_RAMROD_TX_QUEUE_START,
1031                                  PROTOCOLID_CORE, &init_data);
1032         if (rc)
1033                 return rc;
1034
1035         p_ramrod = &p_ent->ramrod.core_tx_queue_start;
1036
1037         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
1038         p_ramrod->sb_index = p_tx->tx_sb_index;
1039         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
1040         p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
1041         p_ramrod->stats_id = p_ll2_conn->tx_stats_id;
1042
1043         DMA_REGPAIR_LE(p_ramrod->pbl_base_addr,
1044                        qed_chain_get_pbl_phys(&p_tx->txq_chain));
1045         pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain);
1046         p_ramrod->pbl_size = cpu_to_le16(pbl_size);
1047
1048         switch (p_ll2_conn->input.tx_tc) {
1049         case PURE_LB_TC:
1050                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
1051                 break;
1052         case PKT_LB_TC:
1053                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO);
1054                 break;
1055         default:
1056                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
1057                 break;
1058         }
1059
1060         p_ramrod->qm_pq_id = cpu_to_le16(pq_id);
1061
1062         switch (conn_type) {
1063         case QED_LL2_TYPE_FCOE:
1064                 p_ramrod->conn_type = PROTOCOLID_FCOE;
1065                 break;
1066         case QED_LL2_TYPE_ISCSI:
1067                 p_ramrod->conn_type = PROTOCOLID_ISCSI;
1068                 break;
1069         case QED_LL2_TYPE_ROCE:
1070                 p_ramrod->conn_type = PROTOCOLID_ROCE;
1071                 break;
1072         case QED_LL2_TYPE_IWARP:
1073                 p_ramrod->conn_type = PROTOCOLID_IWARP;
1074                 break;
1075         case QED_LL2_TYPE_OOO:
1076                 if (p_hwfn->hw_info.personality == QED_PCI_ISCSI)
1077                         p_ramrod->conn_type = PROTOCOLID_ISCSI;
1078                 else
1079                         p_ramrod->conn_type = PROTOCOLID_IWARP;
1080                 break;
1081         default:
1082                 p_ramrod->conn_type = PROTOCOLID_ETH;
1083                 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type);
1084         }
1085
1086         p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1087
1088         rc = qed_spq_post(p_hwfn, p_ent, NULL);
1089         if (rc)
1090                 return rc;
1091
1092         rc = qed_db_recovery_add(p_hwfn->cdev, p_tx->doorbell_addr,
1093                                  &p_tx->db_msg, DB_REC_WIDTH_32B,
1094                                  DB_REC_KERNEL);
1095         return rc;
1096 }
1097
1098 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn,
1099                                     struct qed_ll2_info *p_ll2_conn)
1100 {
1101         struct core_rx_stop_ramrod_data *p_ramrod = NULL;
1102         struct qed_spq_entry *p_ent = NULL;
1103         struct qed_sp_init_data init_data;
1104         int rc = -EINVAL;
1105
1106         /* Get SPQ entry */
1107         memset(&init_data, 0, sizeof(init_data));
1108         init_data.cid = p_ll2_conn->cid;
1109         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1110         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1111
1112         rc = qed_sp_init_request(p_hwfn, &p_ent,
1113                                  CORE_RAMROD_RX_QUEUE_STOP,
1114                                  PROTOCOLID_CORE, &init_data);
1115         if (rc)
1116                 return rc;
1117
1118         p_ramrod = &p_ent->ramrod.core_rx_queue_stop;
1119
1120         p_ramrod->complete_event_flg = 1;
1121         p_ramrod->queue_id = p_ll2_conn->queue_id;
1122
1123         return qed_spq_post(p_hwfn, p_ent, NULL);
1124 }
1125
1126 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn,
1127                                     struct qed_ll2_info *p_ll2_conn)
1128 {
1129         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1130         struct qed_spq_entry *p_ent = NULL;
1131         struct qed_sp_init_data init_data;
1132         int rc = -EINVAL;
1133         qed_db_recovery_del(p_hwfn->cdev, p_tx->doorbell_addr, &p_tx->db_msg);
1134
1135         /* Get SPQ entry */
1136         memset(&init_data, 0, sizeof(init_data));
1137         init_data.cid = p_ll2_conn->cid;
1138         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1139         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1140
1141         rc = qed_sp_init_request(p_hwfn, &p_ent,
1142                                  CORE_RAMROD_TX_QUEUE_STOP,
1143                                  PROTOCOLID_CORE, &init_data);
1144         if (rc)
1145                 return rc;
1146
1147         return qed_spq_post(p_hwfn, p_ent, NULL);
1148 }
1149
1150 static int
1151 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
1152                               struct qed_ll2_info *p_ll2_info)
1153 {
1154         struct qed_ll2_rx_packet *p_descq;
1155         u32 capacity;
1156         int rc = 0;
1157
1158         if (!p_ll2_info->input.rx_num_desc)
1159                 goto out;
1160
1161         rc = qed_chain_alloc(p_hwfn->cdev,
1162                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1163                              QED_CHAIN_MODE_NEXT_PTR,
1164                              QED_CHAIN_CNT_TYPE_U16,
1165                              p_ll2_info->input.rx_num_desc,
1166                              sizeof(struct core_rx_bd),
1167                              &p_ll2_info->rx_queue.rxq_chain, NULL);
1168         if (rc) {
1169                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
1170                 goto out;
1171         }
1172
1173         capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
1174         p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet),
1175                           GFP_KERNEL);
1176         if (!p_descq) {
1177                 rc = -ENOMEM;
1178                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n");
1179                 goto out;
1180         }
1181         p_ll2_info->rx_queue.descq_array = p_descq;
1182
1183         rc = qed_chain_alloc(p_hwfn->cdev,
1184                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1185                              QED_CHAIN_MODE_PBL,
1186                              QED_CHAIN_CNT_TYPE_U16,
1187                              p_ll2_info->input.rx_num_desc,
1188                              sizeof(struct core_rx_fast_path_cqe),
1189                              &p_ll2_info->rx_queue.rcq_chain, NULL);
1190         if (rc) {
1191                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
1192                 goto out;
1193         }
1194
1195         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1196                    "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
1197                    p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc);
1198
1199 out:
1200         return rc;
1201 }
1202
1203 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
1204                                          struct qed_ll2_info *p_ll2_info)
1205 {
1206         struct qed_ll2_tx_packet *p_descq;
1207         u32 desc_size;
1208         u32 capacity;
1209         int rc = 0;
1210
1211         if (!p_ll2_info->input.tx_num_desc)
1212                 goto out;
1213
1214         rc = qed_chain_alloc(p_hwfn->cdev,
1215                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1216                              QED_CHAIN_MODE_PBL,
1217                              QED_CHAIN_CNT_TYPE_U16,
1218                              p_ll2_info->input.tx_num_desc,
1219                              sizeof(struct core_tx_bd),
1220                              &p_ll2_info->tx_queue.txq_chain, NULL);
1221         if (rc)
1222                 goto out;
1223
1224         capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
1225         /* First element is part of the packet, rest are flexibly added */
1226         desc_size = (sizeof(*p_descq) +
1227                      (p_ll2_info->input.tx_max_bds_per_packet - 1) *
1228                      sizeof(p_descq->bds_set));
1229
1230         p_descq = kcalloc(capacity, desc_size, GFP_KERNEL);
1231         if (!p_descq) {
1232                 rc = -ENOMEM;
1233                 goto out;
1234         }
1235         p_ll2_info->tx_queue.descq_mem = p_descq;
1236
1237         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1238                    "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
1239                    p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc);
1240
1241 out:
1242         if (rc)
1243                 DP_NOTICE(p_hwfn,
1244                           "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
1245                           p_ll2_info->input.tx_num_desc);
1246         return rc;
1247 }
1248
1249 static int
1250 qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn,
1251                                struct qed_ll2_info *p_ll2_info, u16 mtu)
1252 {
1253         struct qed_ooo_buffer *p_buf = NULL;
1254         void *p_virt;
1255         u16 buf_idx;
1256         int rc = 0;
1257
1258         if (p_ll2_info->input.conn_type != QED_LL2_TYPE_OOO)
1259                 return rc;
1260
1261         /* Correct number of requested OOO buffers if needed */
1262         if (!p_ll2_info->input.rx_num_ooo_buffers) {
1263                 u16 num_desc = p_ll2_info->input.rx_num_desc;
1264
1265                 if (!num_desc)
1266                         return -EINVAL;
1267                 p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2;
1268         }
1269
1270         for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers;
1271              buf_idx++) {
1272                 p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL);
1273                 if (!p_buf) {
1274                         rc = -ENOMEM;
1275                         goto out;
1276                 }
1277
1278                 p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE;
1279                 p_buf->rx_buffer_size = (p_buf->rx_buffer_size +
1280                                          ETH_CACHE_LINE_SIZE - 1) &
1281                                         ~(ETH_CACHE_LINE_SIZE - 1);
1282                 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
1283                                             p_buf->rx_buffer_size,
1284                                             &p_buf->rx_buffer_phys_addr,
1285                                             GFP_KERNEL);
1286                 if (!p_virt) {
1287                         kfree(p_buf);
1288                         rc = -ENOMEM;
1289                         goto out;
1290                 }
1291
1292                 p_buf->rx_buffer_virt_addr = p_virt;
1293                 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf);
1294         }
1295
1296         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1297                    "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n",
1298                    p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size);
1299
1300 out:
1301         return rc;
1302 }
1303
1304 static int
1305 qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs)
1306 {
1307         if (!cbs || (!cbs->rx_comp_cb ||
1308                      !cbs->rx_release_cb ||
1309                      !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie))
1310                 return -EINVAL;
1311
1312         p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb;
1313         p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb;
1314         p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb;
1315         p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb;
1316         p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb;
1317         p_ll2_info->cbs.cookie = cbs->cookie;
1318
1319         return 0;
1320 }
1321
1322 static enum core_error_handle
1323 qed_ll2_get_error_choice(enum qed_ll2_error_handle err)
1324 {
1325         switch (err) {
1326         case QED_LL2_DROP_PACKET:
1327                 return LL2_DROP_PACKET;
1328         case QED_LL2_DO_NOTHING:
1329                 return LL2_DO_NOTHING;
1330         case QED_LL2_ASSERT:
1331                 return LL2_ASSERT;
1332         default:
1333                 return LL2_DO_NOTHING;
1334         }
1335 }
1336
1337 int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data)
1338 {
1339         struct qed_hwfn *p_hwfn = cxt;
1340         qed_int_comp_cb_t comp_rx_cb, comp_tx_cb;
1341         struct qed_ll2_info *p_ll2_info = NULL;
1342         u8 i, *p_tx_max;
1343         int rc;
1344
1345         if (!data->p_connection_handle || !p_hwfn->p_ll2_info)
1346                 return -EINVAL;
1347
1348         /* Find a free connection to be used */
1349         for (i = 0; (i < QED_MAX_NUM_OF_LL2_CONNECTIONS); i++) {
1350                 mutex_lock(&p_hwfn->p_ll2_info[i].mutex);
1351                 if (p_hwfn->p_ll2_info[i].b_active) {
1352                         mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1353                         continue;
1354                 }
1355
1356                 p_hwfn->p_ll2_info[i].b_active = true;
1357                 p_ll2_info = &p_hwfn->p_ll2_info[i];
1358                 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1359                 break;
1360         }
1361         if (!p_ll2_info)
1362                 return -EBUSY;
1363
1364         memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input));
1365
1366         switch (data->input.tx_dest) {
1367         case QED_LL2_TX_DEST_NW:
1368                 p_ll2_info->tx_dest = CORE_TX_DEST_NW;
1369                 break;
1370         case QED_LL2_TX_DEST_LB:
1371                 p_ll2_info->tx_dest = CORE_TX_DEST_LB;
1372                 break;
1373         case QED_LL2_TX_DEST_DROP:
1374                 p_ll2_info->tx_dest = CORE_TX_DEST_DROP;
1375                 break;
1376         default:
1377                 return -EINVAL;
1378         }
1379
1380         if (data->input.conn_type == QED_LL2_TYPE_OOO ||
1381             data->input.secondary_queue)
1382                 p_ll2_info->main_func_queue = false;
1383         else
1384                 p_ll2_info->main_func_queue = true;
1385
1386         /* Correct maximum number of Tx BDs */
1387         p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet;
1388         if (*p_tx_max == 0)
1389                 *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET;
1390         else
1391                 *p_tx_max = min_t(u8, *p_tx_max,
1392                                   CORE_LL2_TX_MAX_BDS_PER_PACKET);
1393
1394         rc = qed_ll2_set_cbs(p_ll2_info, data->cbs);
1395         if (rc) {
1396                 DP_NOTICE(p_hwfn, "Invalid callback functions\n");
1397                 goto q_allocate_fail;
1398         }
1399
1400         rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info);
1401         if (rc)
1402                 goto q_allocate_fail;
1403
1404         rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info);
1405         if (rc)
1406                 goto q_allocate_fail;
1407
1408         rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info,
1409                                             data->input.mtu);
1410         if (rc)
1411                 goto q_allocate_fail;
1412
1413         /* Register callbacks for the Rx/Tx queues */
1414         if (data->input.conn_type == QED_LL2_TYPE_OOO) {
1415                 comp_rx_cb = qed_ll2_lb_rxq_completion;
1416                 comp_tx_cb = qed_ll2_lb_txq_completion;
1417         } else {
1418                 comp_rx_cb = qed_ll2_rxq_completion;
1419                 comp_tx_cb = qed_ll2_txq_completion;
1420         }
1421
1422         if (data->input.rx_num_desc) {
1423                 qed_int_register_cb(p_hwfn, comp_rx_cb,
1424                                     &p_hwfn->p_ll2_info[i],
1425                                     &p_ll2_info->rx_queue.rx_sb_index,
1426                                     &p_ll2_info->rx_queue.p_fw_cons);
1427                 p_ll2_info->rx_queue.b_cb_registered = true;
1428         }
1429
1430         if (data->input.tx_num_desc) {
1431                 qed_int_register_cb(p_hwfn,
1432                                     comp_tx_cb,
1433                                     &p_hwfn->p_ll2_info[i],
1434                                     &p_ll2_info->tx_queue.tx_sb_index,
1435                                     &p_ll2_info->tx_queue.p_fw_cons);
1436                 p_ll2_info->tx_queue.b_cb_registered = true;
1437         }
1438
1439         *data->p_connection_handle = i;
1440         return rc;
1441
1442 q_allocate_fail:
1443         qed_ll2_release_connection(p_hwfn, i);
1444         return -ENOMEM;
1445 }
1446
1447 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn,
1448                                            struct qed_ll2_info *p_ll2_conn)
1449 {
1450         enum qed_ll2_error_handle error_input;
1451         enum core_error_handle error_mode;
1452         u8 action_on_error = 0;
1453
1454         if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
1455                 return 0;
1456
1457         DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0);
1458         error_input = p_ll2_conn->input.ai_err_packet_too_big;
1459         error_mode = qed_ll2_get_error_choice(error_input);
1460         SET_FIELD(action_on_error,
1461                   CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode);
1462         error_input = p_ll2_conn->input.ai_err_no_buf;
1463         error_mode = qed_ll2_get_error_choice(error_input);
1464         SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode);
1465
1466         return qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
1467 }
1468
1469 static void
1470 qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn,
1471                                  struct qed_ll2_info *p_ll2_conn)
1472 {
1473         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
1474                 return;
1475
1476         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1477         qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
1478 }
1479
1480 int qed_ll2_establish_connection(void *cxt, u8 connection_handle)
1481 {
1482         struct qed_hwfn *p_hwfn = cxt;
1483         struct qed_ll2_info *p_ll2_conn;
1484         struct qed_ll2_tx_packet *p_pkt;
1485         struct qed_ll2_rx_queue *p_rx;
1486         struct qed_ll2_tx_queue *p_tx;
1487         struct qed_ptt *p_ptt;
1488         int rc = -EINVAL;
1489         u32 i, capacity;
1490         u32 desc_size;
1491         u8 qid;
1492
1493         p_ptt = qed_ptt_acquire(p_hwfn);
1494         if (!p_ptt)
1495                 return -EAGAIN;
1496
1497         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1498         if (!p_ll2_conn) {
1499                 rc = -EINVAL;
1500                 goto out;
1501         }
1502
1503         p_rx = &p_ll2_conn->rx_queue;
1504         p_tx = &p_ll2_conn->tx_queue;
1505
1506         qed_chain_reset(&p_rx->rxq_chain);
1507         qed_chain_reset(&p_rx->rcq_chain);
1508         INIT_LIST_HEAD(&p_rx->active_descq);
1509         INIT_LIST_HEAD(&p_rx->free_descq);
1510         INIT_LIST_HEAD(&p_rx->posting_descq);
1511         spin_lock_init(&p_rx->lock);
1512         capacity = qed_chain_get_capacity(&p_rx->rxq_chain);
1513         for (i = 0; i < capacity; i++)
1514                 list_add_tail(&p_rx->descq_array[i].list_entry,
1515                               &p_rx->free_descq);
1516         *p_rx->p_fw_cons = 0;
1517
1518         qed_chain_reset(&p_tx->txq_chain);
1519         INIT_LIST_HEAD(&p_tx->active_descq);
1520         INIT_LIST_HEAD(&p_tx->free_descq);
1521         INIT_LIST_HEAD(&p_tx->sending_descq);
1522         spin_lock_init(&p_tx->lock);
1523         capacity = qed_chain_get_capacity(&p_tx->txq_chain);
1524         /* First element is part of the packet, rest are flexibly added */
1525         desc_size = (sizeof(*p_pkt) +
1526                      (p_ll2_conn->input.tx_max_bds_per_packet - 1) *
1527                      sizeof(p_pkt->bds_set));
1528
1529         for (i = 0; i < capacity; i++) {
1530                 p_pkt = p_tx->descq_mem + desc_size * i;
1531                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
1532         }
1533         p_tx->cur_completing_bd_idx = 0;
1534         p_tx->bds_idx = 0;
1535         p_tx->b_completing_packet = false;
1536         p_tx->cur_send_packet = NULL;
1537         p_tx->cur_send_frag_num = 0;
1538         p_tx->cur_completing_frag_num = 0;
1539         *p_tx->p_fw_cons = 0;
1540
1541         rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
1542         if (rc)
1543                 goto out;
1544
1545         qid = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] + connection_handle;
1546         p_ll2_conn->queue_id = qid;
1547         p_ll2_conn->tx_stats_id = qid;
1548         p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview +
1549                                             GTT_BAR0_MAP_REG_TSDM_RAM +
1550                                             TSTORM_LL2_RX_PRODS_OFFSET(qid);
1551         p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells +
1552                                             qed_db_addr(p_ll2_conn->cid,
1553                                                         DQ_DEMS_LEGACY);
1554         /* prepare db data */
1555         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
1556         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
1557         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
1558                   DQ_XCM_CORE_TX_BD_PROD_CMD);
1559         p_tx->db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
1560
1561
1562         rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
1563         if (rc)
1564                 goto out;
1565
1566         rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
1567         if (rc)
1568                 goto out;
1569
1570         if (!QED_IS_RDMA_PERSONALITY(p_hwfn))
1571                 qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1);
1572
1573         qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn);
1574
1575         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1576                 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
1577                         qed_llh_add_protocol_filter(p_hwfn, p_ptt,
1578                                                     ETH_P_FCOE, 0,
1579                                                     QED_LLH_FILTER_ETHERTYPE);
1580                 qed_llh_add_protocol_filter(p_hwfn, p_ptt,
1581                                             ETH_P_FIP, 0,
1582                                             QED_LLH_FILTER_ETHERTYPE);
1583         }
1584
1585 out:
1586         qed_ptt_release(p_hwfn, p_ptt);
1587         return rc;
1588 }
1589
1590 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn,
1591                                              struct qed_ll2_rx_queue *p_rx,
1592                                              struct qed_ll2_rx_packet *p_curp)
1593 {
1594         struct qed_ll2_rx_packet *p_posting_packet = NULL;
1595         struct core_ll2_rx_prod rx_prod = { 0, 0, 0 };
1596         bool b_notify_fw = false;
1597         u16 bd_prod, cq_prod;
1598
1599         /* This handles the flushing of already posted buffers */
1600         while (!list_empty(&p_rx->posting_descq)) {
1601                 p_posting_packet = list_first_entry(&p_rx->posting_descq,
1602                                                     struct qed_ll2_rx_packet,
1603                                                     list_entry);
1604                 list_move_tail(&p_posting_packet->list_entry,
1605                                &p_rx->active_descq);
1606                 b_notify_fw = true;
1607         }
1608
1609         /* This handles the supplied packet [if there is one] */
1610         if (p_curp) {
1611                 list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
1612                 b_notify_fw = true;
1613         }
1614
1615         if (!b_notify_fw)
1616                 return;
1617
1618         bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
1619         cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
1620         rx_prod.bd_prod = cpu_to_le16(bd_prod);
1621         rx_prod.cqe_prod = cpu_to_le16(cq_prod);
1622
1623         /* Make sure chain element is updated before ringing the doorbell */
1624         dma_wmb();
1625
1626         DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
1627 }
1628
1629 int qed_ll2_post_rx_buffer(void *cxt,
1630                            u8 connection_handle,
1631                            dma_addr_t addr,
1632                            u16 buf_len, void *cookie, u8 notify_fw)
1633 {
1634         struct qed_hwfn *p_hwfn = cxt;
1635         struct core_rx_bd_with_buff_len *p_curb = NULL;
1636         struct qed_ll2_rx_packet *p_curp = NULL;
1637         struct qed_ll2_info *p_ll2_conn;
1638         struct qed_ll2_rx_queue *p_rx;
1639         unsigned long flags;
1640         void *p_data;
1641         int rc = 0;
1642
1643         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1644         if (!p_ll2_conn)
1645                 return -EINVAL;
1646         p_rx = &p_ll2_conn->rx_queue;
1647
1648         spin_lock_irqsave(&p_rx->lock, flags);
1649         if (!list_empty(&p_rx->free_descq))
1650                 p_curp = list_first_entry(&p_rx->free_descq,
1651                                           struct qed_ll2_rx_packet, list_entry);
1652         if (p_curp) {
1653                 if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
1654                     qed_chain_get_elem_left(&p_rx->rcq_chain)) {
1655                         p_data = qed_chain_produce(&p_rx->rxq_chain);
1656                         p_curb = (struct core_rx_bd_with_buff_len *)p_data;
1657                         qed_chain_produce(&p_rx->rcq_chain);
1658                 }
1659         }
1660
1661         /* If we're lacking entires, let's try to flush buffers to FW */
1662         if (!p_curp || !p_curb) {
1663                 rc = -EBUSY;
1664                 p_curp = NULL;
1665                 goto out_notify;
1666         }
1667
1668         /* We have an Rx packet we can fill */
1669         DMA_REGPAIR_LE(p_curb->addr, addr);
1670         p_curb->buff_length = cpu_to_le16(buf_len);
1671         p_curp->rx_buf_addr = addr;
1672         p_curp->cookie = cookie;
1673         p_curp->rxq_bd = p_curb;
1674         p_curp->buf_length = buf_len;
1675         list_del(&p_curp->list_entry);
1676
1677         /* Check if we only want to enqueue this packet without informing FW */
1678         if (!notify_fw) {
1679                 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
1680                 goto out;
1681         }
1682
1683 out_notify:
1684         qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
1685 out:
1686         spin_unlock_irqrestore(&p_rx->lock, flags);
1687         return rc;
1688 }
1689
1690 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
1691                                           struct qed_ll2_tx_queue *p_tx,
1692                                           struct qed_ll2_tx_packet *p_curp,
1693                                           struct qed_ll2_tx_pkt_info *pkt,
1694                                           u8 notify_fw)
1695 {
1696         list_del(&p_curp->list_entry);
1697         p_curp->cookie = pkt->cookie;
1698         p_curp->bd_used = pkt->num_of_bds;
1699         p_curp->notify_fw = notify_fw;
1700         p_tx->cur_send_packet = p_curp;
1701         p_tx->cur_send_frag_num = 0;
1702
1703         p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag;
1704         p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len;
1705         p_tx->cur_send_frag_num++;
1706 }
1707
1708 static void
1709 qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
1710                                  struct qed_ll2_info *p_ll2,
1711                                  struct qed_ll2_tx_packet *p_curp,
1712                                  struct qed_ll2_tx_pkt_info *pkt)
1713 {
1714         struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
1715         u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
1716         struct core_tx_bd *start_bd = NULL;
1717         enum core_roce_flavor_type roce_flavor;
1718         enum core_tx_dest tx_dest;
1719         u16 bd_data = 0, frag_idx;
1720
1721         roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE
1722                                                              : CORE_RROCE;
1723
1724         switch (pkt->tx_dest) {
1725         case QED_LL2_TX_DEST_NW:
1726                 tx_dest = CORE_TX_DEST_NW;
1727                 break;
1728         case QED_LL2_TX_DEST_LB:
1729                 tx_dest = CORE_TX_DEST_LB;
1730                 break;
1731         case QED_LL2_TX_DEST_DROP:
1732                 tx_dest = CORE_TX_DEST_DROP;
1733                 break;
1734         default:
1735                 tx_dest = CORE_TX_DEST_LB;
1736                 break;
1737         }
1738
1739         start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1740         if (QED_IS_IWARP_PERSONALITY(p_hwfn) &&
1741             p_ll2->input.conn_type == QED_LL2_TYPE_OOO) {
1742                 start_bd->nw_vlan_or_lb_echo =
1743                     cpu_to_le16(IWARP_LL2_IN_ORDER_TX_QUEUE);
1744         } else {
1745                 start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan);
1746                 if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
1747                     p_ll2->input.conn_type == QED_LL2_TYPE_FCOE)
1748                         pkt->remove_stag = true;
1749         }
1750
1751         SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W,
1752                   cpu_to_le16(pkt->l4_hdr_offset_w));
1753         SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest);
1754         bd_data |= pkt->bd_flags;
1755         SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1);
1756         SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds);
1757         SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor);
1758         SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_CSUM, !!(pkt->enable_ip_cksum));
1759         SET_FIELD(bd_data, CORE_TX_BD_DATA_L4_CSUM, !!(pkt->enable_l4_cksum));
1760         SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_LEN, !!(pkt->calc_ip_len));
1761         SET_FIELD(bd_data, CORE_TX_BD_DATA_DISABLE_STAG_INSERTION,
1762                   !!(pkt->remove_stag));
1763
1764         start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data);
1765         DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag);
1766         start_bd->nbytes = cpu_to_le16(pkt->first_frag_len);
1767
1768         DP_VERBOSE(p_hwfn,
1769                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1770                    "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",
1771                    p_ll2->queue_id,
1772                    p_ll2->cid,
1773                    p_ll2->input.conn_type,
1774                    prod_idx,
1775                    pkt->first_frag_len,
1776                    pkt->num_of_bds,
1777                    le32_to_cpu(start_bd->addr.hi),
1778                    le32_to_cpu(start_bd->addr.lo));
1779
1780         if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds)
1781                 return;
1782
1783         /* Need to provide the packet with additional BDs for frags */
1784         for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
1785              frag_idx < pkt->num_of_bds; frag_idx++) {
1786                 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
1787
1788                 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1789                 (*p_bd)->bd_data.as_bitfield = 0;
1790                 (*p_bd)->bitfield1 = 0;
1791                 p_curp->bds_set[frag_idx].tx_frag = 0;
1792                 p_curp->bds_set[frag_idx].frag_len = 0;
1793         }
1794 }
1795
1796 /* This should be called while the Txq spinlock is being held */
1797 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
1798                                      struct qed_ll2_info *p_ll2_conn)
1799 {
1800         bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
1801         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1802         struct qed_ll2_tx_packet *p_pkt = NULL;
1803         u16 bd_prod;
1804
1805         /* If there are missing BDs, don't do anything now */
1806         if (p_ll2_conn->tx_queue.cur_send_frag_num !=
1807             p_ll2_conn->tx_queue.cur_send_packet->bd_used)
1808                 return;
1809
1810         /* Push the current packet to the list and clean after it */
1811         list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
1812                       &p_ll2_conn->tx_queue.sending_descq);
1813         p_ll2_conn->tx_queue.cur_send_packet = NULL;
1814         p_ll2_conn->tx_queue.cur_send_frag_num = 0;
1815
1816         /* Notify FW of packet only if requested to */
1817         if (!b_notify)
1818                 return;
1819
1820         bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
1821
1822         while (!list_empty(&p_tx->sending_descq)) {
1823                 p_pkt = list_first_entry(&p_tx->sending_descq,
1824                                          struct qed_ll2_tx_packet, list_entry);
1825                 if (!p_pkt)
1826                         break;
1827
1828                 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq);
1829         }
1830
1831         p_tx->db_msg.spq_prod = cpu_to_le16(bd_prod);
1832
1833         /* Make sure the BDs data is updated before ringing the doorbell */
1834         wmb();
1835
1836         DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&p_tx->db_msg));
1837
1838         DP_VERBOSE(p_hwfn,
1839                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1840                    "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
1841                    p_ll2_conn->queue_id,
1842                    p_ll2_conn->cid,
1843                    p_ll2_conn->input.conn_type, p_tx->db_msg.spq_prod);
1844 }
1845
1846 int qed_ll2_prepare_tx_packet(void *cxt,
1847                               u8 connection_handle,
1848                               struct qed_ll2_tx_pkt_info *pkt,
1849                               bool notify_fw)
1850 {
1851         struct qed_hwfn *p_hwfn = cxt;
1852         struct qed_ll2_tx_packet *p_curp = NULL;
1853         struct qed_ll2_info *p_ll2_conn = NULL;
1854         struct qed_ll2_tx_queue *p_tx;
1855         struct qed_chain *p_tx_chain;
1856         unsigned long flags;
1857         int rc = 0;
1858
1859         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1860         if (!p_ll2_conn)
1861                 return -EINVAL;
1862         p_tx = &p_ll2_conn->tx_queue;
1863         p_tx_chain = &p_tx->txq_chain;
1864
1865         if (pkt->num_of_bds > p_ll2_conn->input.tx_max_bds_per_packet)
1866                 return -EIO;
1867
1868         spin_lock_irqsave(&p_tx->lock, flags);
1869         if (p_tx->cur_send_packet) {
1870                 rc = -EEXIST;
1871                 goto out;
1872         }
1873
1874         /* Get entry, but only if we have tx elements for it */
1875         if (!list_empty(&p_tx->free_descq))
1876                 p_curp = list_first_entry(&p_tx->free_descq,
1877                                           struct qed_ll2_tx_packet, list_entry);
1878         if (p_curp && qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds)
1879                 p_curp = NULL;
1880
1881         if (!p_curp) {
1882                 rc = -EBUSY;
1883                 goto out;
1884         }
1885
1886         /* Prepare packet and BD, and perhaps send a doorbell to FW */
1887         qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw);
1888
1889         qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt);
1890
1891         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1892
1893 out:
1894         spin_unlock_irqrestore(&p_tx->lock, flags);
1895         return rc;
1896 }
1897
1898 int qed_ll2_set_fragment_of_tx_packet(void *cxt,
1899                                       u8 connection_handle,
1900                                       dma_addr_t addr, u16 nbytes)
1901 {
1902         struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
1903         struct qed_hwfn *p_hwfn = cxt;
1904         struct qed_ll2_info *p_ll2_conn = NULL;
1905         u16 cur_send_frag_num = 0;
1906         struct core_tx_bd *p_bd;
1907         unsigned long flags;
1908
1909         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1910         if (!p_ll2_conn)
1911                 return -EINVAL;
1912
1913         if (!p_ll2_conn->tx_queue.cur_send_packet)
1914                 return -EINVAL;
1915
1916         p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
1917         cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
1918
1919         if (cur_send_frag_num >= p_cur_send_packet->bd_used)
1920                 return -EINVAL;
1921
1922         /* Fill the BD information, and possibly notify FW */
1923         p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
1924         DMA_REGPAIR_LE(p_bd->addr, addr);
1925         p_bd->nbytes = cpu_to_le16(nbytes);
1926         p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
1927         p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
1928
1929         p_ll2_conn->tx_queue.cur_send_frag_num++;
1930
1931         spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
1932         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1933         spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
1934
1935         return 0;
1936 }
1937
1938 int qed_ll2_terminate_connection(void *cxt, u8 connection_handle)
1939 {
1940         struct qed_hwfn *p_hwfn = cxt;
1941         struct qed_ll2_info *p_ll2_conn = NULL;
1942         int rc = -EINVAL;
1943         struct qed_ptt *p_ptt;
1944
1945         p_ptt = qed_ptt_acquire(p_hwfn);
1946         if (!p_ptt)
1947                 return -EAGAIN;
1948
1949         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1950         if (!p_ll2_conn) {
1951                 rc = -EINVAL;
1952                 goto out;
1953         }
1954
1955         /* Stop Tx & Rx of connection, if needed */
1956         if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
1957                 p_ll2_conn->tx_queue.b_cb_registered = false;
1958                 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
1959                 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
1960                 if (rc)
1961                         goto out;
1962
1963                 qed_ll2_txq_flush(p_hwfn, connection_handle);
1964                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
1965         }
1966
1967         if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
1968                 p_ll2_conn->rx_queue.b_cb_registered = false;
1969                 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
1970                 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
1971                 if (rc)
1972                         goto out;
1973
1974                 qed_ll2_rxq_flush(p_hwfn, connection_handle);
1975                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
1976         }
1977
1978         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
1979                 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1980
1981         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1982                 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
1983                         qed_llh_remove_protocol_filter(p_hwfn, p_ptt,
1984                                                        ETH_P_FCOE, 0,
1985                                                       QED_LLH_FILTER_ETHERTYPE);
1986                 qed_llh_remove_protocol_filter(p_hwfn, p_ptt,
1987                                                ETH_P_FIP, 0,
1988                                                QED_LLH_FILTER_ETHERTYPE);
1989         }
1990
1991 out:
1992         qed_ptt_release(p_hwfn, p_ptt);
1993         return rc;
1994 }
1995
1996 static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn,
1997                                            struct qed_ll2_info *p_ll2_conn)
1998 {
1999         struct qed_ooo_buffer *p_buffer;
2000
2001         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
2002                 return;
2003
2004         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
2005         while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
2006                                                    p_hwfn->p_ooo_info))) {
2007                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
2008                                   p_buffer->rx_buffer_size,
2009                                   p_buffer->rx_buffer_virt_addr,
2010                                   p_buffer->rx_buffer_phys_addr);
2011                 kfree(p_buffer);
2012         }
2013 }
2014
2015 void qed_ll2_release_connection(void *cxt, u8 connection_handle)
2016 {
2017         struct qed_hwfn *p_hwfn = cxt;
2018         struct qed_ll2_info *p_ll2_conn = NULL;
2019
2020         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2021         if (!p_ll2_conn)
2022                 return;
2023
2024         kfree(p_ll2_conn->tx_queue.descq_mem);
2025         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
2026
2027         kfree(p_ll2_conn->rx_queue.descq_array);
2028         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
2029         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
2030
2031         qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
2032
2033         qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn);
2034
2035         mutex_lock(&p_ll2_conn->mutex);
2036         p_ll2_conn->b_active = false;
2037         mutex_unlock(&p_ll2_conn->mutex);
2038 }
2039
2040 int qed_ll2_alloc(struct qed_hwfn *p_hwfn)
2041 {
2042         struct qed_ll2_info *p_ll2_connections;
2043         u8 i;
2044
2045         /* Allocate LL2's set struct */
2046         p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
2047                                     sizeof(struct qed_ll2_info), GFP_KERNEL);
2048         if (!p_ll2_connections) {
2049                 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
2050                 return -ENOMEM;
2051         }
2052
2053         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2054                 p_ll2_connections[i].my_id = i;
2055
2056         p_hwfn->p_ll2_info = p_ll2_connections;
2057         return 0;
2058 }
2059
2060 void qed_ll2_setup(struct qed_hwfn *p_hwfn)
2061 {
2062         int i;
2063
2064         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2065                 mutex_init(&p_hwfn->p_ll2_info[i].mutex);
2066 }
2067
2068 void qed_ll2_free(struct qed_hwfn *p_hwfn)
2069 {
2070         if (!p_hwfn->p_ll2_info)
2071                 return;
2072
2073         kfree(p_hwfn->p_ll2_info);
2074         p_hwfn->p_ll2_info = NULL;
2075 }
2076
2077 static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn,
2078                                     struct qed_ptt *p_ptt,
2079                                     struct qed_ll2_stats *p_stats)
2080 {
2081         struct core_ll2_port_stats port_stats;
2082
2083         memset(&port_stats, 0, sizeof(port_stats));
2084         qed_memcpy_from(p_hwfn, p_ptt, &port_stats,
2085                         BAR0_MAP_REG_TSDM_RAM +
2086                         TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)),
2087                         sizeof(port_stats));
2088
2089         p_stats->gsi_invalid_hdr = HILO_64_REGPAIR(port_stats.gsi_invalid_hdr);
2090         p_stats->gsi_invalid_pkt_length =
2091             HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length);
2092         p_stats->gsi_unsupported_pkt_typ =
2093             HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ);
2094         p_stats->gsi_crcchksm_error =
2095             HILO_64_REGPAIR(port_stats.gsi_crcchksm_error);
2096 }
2097
2098 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,
2099                                 struct qed_ptt *p_ptt,
2100                                 struct qed_ll2_info *p_ll2_conn,
2101                                 struct qed_ll2_stats *p_stats)
2102 {
2103         struct core_ll2_tstorm_per_queue_stat tstats;
2104         u8 qid = p_ll2_conn->queue_id;
2105         u32 tstats_addr;
2106
2107         memset(&tstats, 0, sizeof(tstats));
2108         tstats_addr = BAR0_MAP_REG_TSDM_RAM +
2109                       CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
2110         qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
2111
2112         p_stats->packet_too_big_discard =
2113                         HILO_64_REGPAIR(tstats.packet_too_big_discard);
2114         p_stats->no_buff_discard = HILO_64_REGPAIR(tstats.no_buff_discard);
2115 }
2116
2117 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
2118                                 struct qed_ptt *p_ptt,
2119                                 struct qed_ll2_info *p_ll2_conn,
2120                                 struct qed_ll2_stats *p_stats)
2121 {
2122         struct core_ll2_ustorm_per_queue_stat ustats;
2123         u8 qid = p_ll2_conn->queue_id;
2124         u32 ustats_addr;
2125
2126         memset(&ustats, 0, sizeof(ustats));
2127         ustats_addr = BAR0_MAP_REG_USDM_RAM +
2128                       CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
2129         qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
2130
2131         p_stats->rcv_ucast_bytes = HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
2132         p_stats->rcv_mcast_bytes = HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
2133         p_stats->rcv_bcast_bytes = HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
2134         p_stats->rcv_ucast_pkts = HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
2135         p_stats->rcv_mcast_pkts = HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
2136         p_stats->rcv_bcast_pkts = HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
2137 }
2138
2139 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
2140                                 struct qed_ptt *p_ptt,
2141                                 struct qed_ll2_info *p_ll2_conn,
2142                                 struct qed_ll2_stats *p_stats)
2143 {
2144         struct core_ll2_pstorm_per_queue_stat pstats;
2145         u8 stats_id = p_ll2_conn->tx_stats_id;
2146         u32 pstats_addr;
2147
2148         memset(&pstats, 0, sizeof(pstats));
2149         pstats_addr = BAR0_MAP_REG_PSDM_RAM +
2150                       CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
2151         qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
2152
2153         p_stats->sent_ucast_bytes = HILO_64_REGPAIR(pstats.sent_ucast_bytes);
2154         p_stats->sent_mcast_bytes = HILO_64_REGPAIR(pstats.sent_mcast_bytes);
2155         p_stats->sent_bcast_bytes = HILO_64_REGPAIR(pstats.sent_bcast_bytes);
2156         p_stats->sent_ucast_pkts = HILO_64_REGPAIR(pstats.sent_ucast_pkts);
2157         p_stats->sent_mcast_pkts = HILO_64_REGPAIR(pstats.sent_mcast_pkts);
2158         p_stats->sent_bcast_pkts = HILO_64_REGPAIR(pstats.sent_bcast_pkts);
2159 }
2160
2161 int qed_ll2_get_stats(void *cxt,
2162                       u8 connection_handle, struct qed_ll2_stats *p_stats)
2163 {
2164         struct qed_hwfn *p_hwfn = cxt;
2165         struct qed_ll2_info *p_ll2_conn = NULL;
2166         struct qed_ptt *p_ptt;
2167
2168         memset(p_stats, 0, sizeof(*p_stats));
2169
2170         if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
2171             !p_hwfn->p_ll2_info)
2172                 return -EINVAL;
2173
2174         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
2175
2176         p_ptt = qed_ptt_acquire(p_hwfn);
2177         if (!p_ptt) {
2178                 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
2179                 return -EINVAL;
2180         }
2181
2182         if (p_ll2_conn->input.gsi_enable)
2183                 _qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats);
2184         _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2185         _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2186         if (p_ll2_conn->tx_stats_en)
2187                 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2188
2189         qed_ptt_release(p_hwfn, p_ptt);
2190         return 0;
2191 }
2192
2193 static void qed_ll2b_release_rx_packet(void *cxt,
2194                                        u8 connection_handle,
2195                                        void *cookie,
2196                                        dma_addr_t rx_buf_addr,
2197                                        bool b_last_packet)
2198 {
2199         struct qed_hwfn *p_hwfn = cxt;
2200
2201         qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie);
2202 }
2203
2204 static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
2205                                     const struct qed_ll2_cb_ops *ops,
2206                                     void *cookie)
2207 {
2208         cdev->ll2->cbs = ops;
2209         cdev->ll2->cb_cookie = cookie;
2210 }
2211
2212 struct qed_ll2_cbs ll2_cbs = {
2213         .rx_comp_cb = &qed_ll2b_complete_rx_packet,
2214         .rx_release_cb = &qed_ll2b_release_rx_packet,
2215         .tx_comp_cb = &qed_ll2b_complete_tx_packet,
2216         .tx_release_cb = &qed_ll2b_complete_tx_packet,
2217 };
2218
2219 static void qed_ll2_set_conn_data(struct qed_dev *cdev,
2220                                   struct qed_ll2_acquire_data *data,
2221                                   struct qed_ll2_params *params,
2222                                   enum qed_ll2_conn_type conn_type,
2223                                   u8 *handle, bool lb)
2224 {
2225         memset(data, 0, sizeof(*data));
2226
2227         data->input.conn_type = conn_type;
2228         data->input.mtu = params->mtu;
2229         data->input.rx_num_desc = QED_LL2_RX_SIZE;
2230         data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets;
2231         data->input.rx_vlan_removal_en = params->rx_vlan_stripping;
2232         data->input.tx_num_desc = QED_LL2_TX_SIZE;
2233         data->p_connection_handle = handle;
2234         data->cbs = &ll2_cbs;
2235         ll2_cbs.cookie = QED_LEADING_HWFN(cdev);
2236
2237         if (lb) {
2238                 data->input.tx_tc = PKT_LB_TC;
2239                 data->input.tx_dest = QED_LL2_TX_DEST_LB;
2240         } else {
2241                 data->input.tx_tc = 0;
2242                 data->input.tx_dest = QED_LL2_TX_DEST_NW;
2243         }
2244 }
2245
2246 static int qed_ll2_start_ooo(struct qed_dev *cdev,
2247                              struct qed_ll2_params *params)
2248 {
2249         struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
2250         u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
2251         struct qed_ll2_acquire_data data;
2252         int rc;
2253
2254         qed_ll2_set_conn_data(cdev, &data, params,
2255                               QED_LL2_TYPE_OOO, handle, true);
2256
2257         rc = qed_ll2_acquire_connection(hwfn, &data);
2258         if (rc) {
2259                 DP_INFO(cdev, "Failed to acquire LL2 OOO connection\n");
2260                 goto out;
2261         }
2262
2263         rc = qed_ll2_establish_connection(hwfn, *handle);
2264         if (rc) {
2265                 DP_INFO(cdev, "Failed to establist LL2 OOO connection\n");
2266                 goto fail;
2267         }
2268
2269         return 0;
2270
2271 fail:
2272         qed_ll2_release_connection(hwfn, *handle);
2273 out:
2274         *handle = QED_LL2_UNUSED_HANDLE;
2275         return rc;
2276 }
2277
2278 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
2279 {
2280         struct qed_ll2_buffer *buffer, *tmp_buffer;
2281         enum qed_ll2_conn_type conn_type;
2282         struct qed_ll2_acquire_data data;
2283         struct qed_ptt *p_ptt;
2284         int rc, i;
2285
2286
2287         /* Initialize LL2 locks & lists */
2288         INIT_LIST_HEAD(&cdev->ll2->list);
2289         spin_lock_init(&cdev->ll2->lock);
2290         cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
2291                              L1_CACHE_BYTES + params->mtu;
2292
2293         /*Allocate memory for LL2 */
2294         DP_INFO(cdev, "Allocating LL2 buffers of size %08x bytes\n",
2295                 cdev->ll2->rx_size);
2296         for (i = 0; i < QED_LL2_RX_SIZE; i++) {
2297                 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2298                 if (!buffer) {
2299                         DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
2300                         goto fail;
2301                 }
2302
2303                 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
2304                                           &buffer->phys_addr);
2305                 if (rc) {
2306                         kfree(buffer);
2307                         goto fail;
2308                 }
2309
2310                 list_add_tail(&buffer->list, &cdev->ll2->list);
2311         }
2312
2313         switch (QED_LEADING_HWFN(cdev)->hw_info.personality) {
2314         case QED_PCI_FCOE:
2315                 conn_type = QED_LL2_TYPE_FCOE;
2316                 break;
2317         case QED_PCI_ISCSI:
2318                 conn_type = QED_LL2_TYPE_ISCSI;
2319                 break;
2320         case QED_PCI_ETH_ROCE:
2321                 conn_type = QED_LL2_TYPE_ROCE;
2322                 break;
2323         default:
2324                 conn_type = QED_LL2_TYPE_TEST;
2325         }
2326
2327         qed_ll2_set_conn_data(cdev, &data, params, conn_type,
2328                               &cdev->ll2->handle, false);
2329
2330         rc = qed_ll2_acquire_connection(QED_LEADING_HWFN(cdev), &data);
2331         if (rc) {
2332                 DP_INFO(cdev, "Failed to acquire LL2 connection\n");
2333                 goto fail;
2334         }
2335
2336         rc = qed_ll2_establish_connection(QED_LEADING_HWFN(cdev),
2337                                           cdev->ll2->handle);
2338         if (rc) {
2339                 DP_INFO(cdev, "Failed to establish LL2 connection\n");
2340                 goto release_fail;
2341         }
2342
2343         /* Post all Rx buffers to FW */
2344         spin_lock_bh(&cdev->ll2->lock);
2345         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) {
2346                 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev),
2347                                             cdev->ll2->handle,
2348                                             buffer->phys_addr, 0, buffer, 1);
2349                 if (rc) {
2350                         DP_INFO(cdev,
2351                                 "Failed to post an Rx buffer; Deleting it\n");
2352                         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
2353                                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
2354                         kfree(buffer->data);
2355                         list_del(&buffer->list);
2356                         kfree(buffer);
2357                 } else {
2358                         cdev->ll2->rx_cnt++;
2359                 }
2360         }
2361         spin_unlock_bh(&cdev->ll2->lock);
2362
2363         if (!cdev->ll2->rx_cnt) {
2364                 DP_INFO(cdev, "Failed passing even a single Rx buffer\n");
2365                 goto release_terminate;
2366         }
2367
2368         if (!is_valid_ether_addr(params->ll2_mac_address)) {
2369                 DP_INFO(cdev, "Invalid Ethernet address\n");
2370                 goto release_terminate;
2371         }
2372
2373         if (QED_LEADING_HWFN(cdev)->hw_info.personality == QED_PCI_ISCSI) {
2374                 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n");
2375                 rc = qed_ll2_start_ooo(cdev, params);
2376                 if (rc) {
2377                         DP_INFO(cdev,
2378                                 "Failed to initialize the OOO LL2 queue\n");
2379                         goto release_terminate;
2380                 }
2381         }
2382
2383         p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
2384         if (!p_ptt) {
2385                 DP_INFO(cdev, "Failed to acquire PTT\n");
2386                 goto release_terminate;
2387         }
2388
2389         rc = qed_llh_add_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
2390                                     params->ll2_mac_address);
2391         qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
2392         if (rc) {
2393                 DP_ERR(cdev, "Failed to allocate LLH filter\n");
2394                 goto release_terminate_all;
2395         }
2396
2397         ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
2398         return 0;
2399
2400 release_terminate_all:
2401
2402 release_terminate:
2403         qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2404 release_fail:
2405         qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2406 fail:
2407         qed_ll2_kill_buffers(cdev);
2408         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2409         return -EINVAL;
2410 }
2411
2412 static int qed_ll2_stop(struct qed_dev *cdev)
2413 {
2414         struct qed_ptt *p_ptt;
2415         int rc;
2416
2417         if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
2418                 return 0;
2419
2420         p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
2421         if (!p_ptt) {
2422                 DP_INFO(cdev, "Failed to acquire PTT\n");
2423                 goto fail;
2424         }
2425
2426         qed_llh_remove_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
2427                                   cdev->ll2_mac_address);
2428         qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
2429         eth_zero_addr(cdev->ll2_mac_address);
2430
2431         if (QED_LEADING_HWFN(cdev)->hw_info.personality == QED_PCI_ISCSI)
2432                 qed_ll2_stop_ooo(cdev);
2433
2434         rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev),
2435                                           cdev->ll2->handle);
2436         if (rc)
2437                 DP_INFO(cdev, "Failed to terminate LL2 connection\n");
2438
2439         qed_ll2_kill_buffers(cdev);
2440
2441         qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2442         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2443
2444         return rc;
2445 fail:
2446         return -EINVAL;
2447 }
2448
2449 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb,
2450                               unsigned long xmit_flags)
2451 {
2452         struct qed_ll2_tx_pkt_info pkt;
2453         const skb_frag_t *frag;
2454         u8 flags = 0, nr_frags;
2455         int rc = -EINVAL, i;
2456         dma_addr_t mapping;
2457         u16 vlan = 0;
2458
2459         if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
2460                 DP_INFO(cdev, "Cannot transmit a checksummed packet\n");
2461                 return -EINVAL;
2462         }
2463
2464         /* Cache number of fragments from SKB since SKB may be freed by
2465          * the completion routine after calling qed_ll2_prepare_tx_packet()
2466          */
2467         nr_frags = skb_shinfo(skb)->nr_frags;
2468
2469         if (1 + nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) {
2470                 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
2471                        1 + nr_frags);
2472                 return -EINVAL;
2473         }
2474
2475         mapping = dma_map_single(&cdev->pdev->dev, skb->data,
2476                                  skb->len, DMA_TO_DEVICE);
2477         if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2478                 DP_NOTICE(cdev, "SKB mapping failed\n");
2479                 return -EINVAL;
2480         }
2481
2482         /* Request HW to calculate IP csum */
2483         if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
2484               ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
2485                 flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT);
2486
2487         if (skb_vlan_tag_present(skb)) {
2488                 vlan = skb_vlan_tag_get(skb);
2489                 flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT);
2490         }
2491
2492         memset(&pkt, 0, sizeof(pkt));
2493         pkt.num_of_bds = 1 + nr_frags;
2494         pkt.vlan = vlan;
2495         pkt.bd_flags = flags;
2496         pkt.tx_dest = QED_LL2_TX_DEST_NW;
2497         pkt.first_frag = mapping;
2498         pkt.first_frag_len = skb->len;
2499         pkt.cookie = skb;
2500         if (test_bit(QED_MF_UFP_SPECIFIC, &cdev->mf_bits) &&
2501             test_bit(QED_LL2_XMIT_FLAGS_FIP_DISCOVERY, &xmit_flags))
2502                 pkt.remove_stag = true;
2503
2504         /* qed_ll2_prepare_tx_packet() may actually send the packet if
2505          * there are no fragments in the skb and subsequently the completion
2506          * routine may run and free the SKB, so no dereferencing the SKB
2507          * beyond this point unless skb has any fragments.
2508          */
2509         rc = qed_ll2_prepare_tx_packet(&cdev->hwfns[0], cdev->ll2->handle,
2510                                        &pkt, 1);
2511         if (rc)
2512                 goto err;
2513
2514         for (i = 0; i < nr_frags; i++) {
2515                 frag = &skb_shinfo(skb)->frags[i];
2516
2517                 mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0,
2518                                            skb_frag_size(frag), DMA_TO_DEVICE);
2519
2520                 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2521                         DP_NOTICE(cdev,
2522                                   "Unable to map frag - dropping packet\n");
2523                         rc = -ENOMEM;
2524                         goto err;
2525                 }
2526
2527                 rc = qed_ll2_set_fragment_of_tx_packet(QED_LEADING_HWFN(cdev),
2528                                                        cdev->ll2->handle,
2529                                                        mapping,
2530                                                        skb_frag_size(frag));
2531
2532                 /* if failed not much to do here, partial packet has been posted
2533                  * we can't free memory, will need to wait for completion.
2534                  */
2535                 if (rc)
2536                         goto err2;
2537         }
2538
2539         return 0;
2540
2541 err:
2542         dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE);
2543
2544 err2:
2545         return rc;
2546 }
2547
2548 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats)
2549 {
2550         if (!cdev->ll2)
2551                 return -EINVAL;
2552
2553         return qed_ll2_get_stats(QED_LEADING_HWFN(cdev),
2554                                  cdev->ll2->handle, stats);
2555 }
2556
2557 const struct qed_ll2_ops qed_ll2_ops_pass = {
2558         .start = &qed_ll2_start,
2559         .stop = &qed_ll2_stop,
2560         .start_xmit = &qed_ll2_start_xmit,
2561         .register_cb_ops = &qed_ll2_register_cb_ops,
2562         .get_stats = &qed_ll2_stats,
2563 };
2564
2565 int qed_ll2_alloc_if(struct qed_dev *cdev)
2566 {
2567         cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL);
2568         return cdev->ll2 ? 0 : -ENOMEM;
2569 }
2570
2571 void qed_ll2_dealloc_if(struct qed_dev *cdev)
2572 {
2573         kfree(cdev->ll2);
2574         cdev->ll2 = NULL;
2575 }