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