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