drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   4  * Copyright(c) 2013 - 2014 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * The full GNU General Public License is included in this distribution in
  19  * the file called "COPYING".
  20  *
  21  * Contact Information:
  22  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  ******************************************************************************/
  26
  27 #include "i40evf.h"
  28 #include "i40e_prototype.h"
  29
  30 /* busy wait delay in msec */
  31 #define I40EVF_BUSY_WAIT_DELAY 10
  32 #define I40EVF_BUSY_WAIT_COUNT 50
  33
  34 /**
  35  * i40evf_send_pf_msg
  36  * @adapter: adapter structure
  37  * @op: virtual channel opcode
  38  * @msg: pointer to message buffer
  39  * @len: message length
  40  *
  41  * Send message to PF and print status if failure.
  42  **/
  43 static int i40evf_send_pf_msg(struct i40evf_adapter *adapter,
  44                               enum i40e_virtchnl_ops op, u8 *msg, u16 len)
  45 {
  46         struct i40e_hw *hw = &adapter->hw;
  47         i40e_status err;
  48
  49         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
  50                 return 0; /* nothing to see here, move along */
  51
  52         err = i40e_aq_send_msg_to_pf(hw, op, 0, msg, len, NULL);
  53         if (err)
  54                 dev_err(&adapter->pdev->dev, "Unable to send opcode %d to PF, err %s, aq_err %s\n",
  55                         op, i40evf_stat_str(hw, err),
  56                         i40evf_aq_str(hw, hw->aq.asq_last_status));
  57         return err;
  58 }
  59
  60 /**
  61  * i40evf_send_api_ver
  62  * @adapter: adapter structure
  63  *
  64  * Send API version admin queue message to the PF. The reply is not checked
  65  * in this function. Returns 0 if the message was successfully
  66  * sent, or one of the I40E_ADMIN_QUEUE_ERROR_ statuses if not.
  67  **/
  68 int i40evf_send_api_ver(struct i40evf_adapter *adapter)
  69 {
  70         struct i40e_virtchnl_version_info vvi;
  71
  72         vvi.major = I40E_VIRTCHNL_VERSION_MAJOR;
  73         vvi.minor = I40E_VIRTCHNL_VERSION_MINOR;
  74
  75         return i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_VERSION, (u8 *)&vvi,
  76                                   sizeof(vvi));
  77 }
  78
  79 /**
  80  * i40evf_verify_api_ver
  81  * @adapter: adapter structure
  82  *
  83  * Compare API versions with the PF. Must be called after admin queue is
  84  * initialized. Returns 0 if API versions match, -EIO if they do not,
  85  * I40E_ERR_ADMIN_QUEUE_NO_WORK if the admin queue is empty, and any errors
  86  * from the firmware are propagated.
  87  **/
  88 int i40evf_verify_api_ver(struct i40evf_adapter *adapter)
  89 {
  90         struct i40e_virtchnl_version_info *pf_vvi;
  91         struct i40e_hw *hw = &adapter->hw;
  92         struct i40e_arq_event_info event;
  93         enum i40e_virtchnl_ops op;
  94         i40e_status err;
  95
  96         event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
  97         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
  98         if (!event.msg_buf) {
  99                 err = -ENOMEM;
 100                 goto out;
 101         }
 102
 103         while (1) {
 104                 err = i40evf_clean_arq_element(hw, &event, NULL);
 105                 /* When the AQ is empty, i40evf_clean_arq_element will return
 106                  * nonzero and this loop will terminate.
 107                  */
 108                 if (err)
 109                         goto out_alloc;
 110                 op =
 111                     (enum i40e_virtchnl_ops)le32_to_cpu(event.desc.cookie_high);
 112                 if (op == I40E_VIRTCHNL_OP_VERSION)
 113                         break;
 114         }
 115
 116
 117         err = (i40e_status)le32_to_cpu(event.desc.cookie_low);
 118         if (err)
 119                 goto out_alloc;
 120
 121         if (op != I40E_VIRTCHNL_OP_VERSION) {
 122                 dev_info(&adapter->pdev->dev, "Invalid reply type %d from PF\n",
 123                         op);
 124                 err = -EIO;
 125                 goto out_alloc;
 126         }
 127
 128         pf_vvi = (struct i40e_virtchnl_version_info *)event.msg_buf;
 129         adapter->pf_version = *pf_vvi;
 130
 131         if ((pf_vvi->major > I40E_VIRTCHNL_VERSION_MAJOR) ||
 132             ((pf_vvi->major == I40E_VIRTCHNL_VERSION_MAJOR) &&
 133              (pf_vvi->minor > I40E_VIRTCHNL_VERSION_MINOR)))
 134                 err = -EIO;
 135
 136 out_alloc:
 137         kfree(event.msg_buf);
 138 out:
 139         return err;
 140 }
 141
 142 /**
 143  * i40evf_send_vf_config_msg
 144  * @adapter: adapter structure
 145  *
 146  * Send VF configuration request admin queue message to the PF. The reply
 147  * is not checked in this function. Returns 0 if the message was
 148  * successfully sent, or one of the I40E_ADMIN_QUEUE_ERROR_ statuses if not.
 149  **/
 150 int i40evf_send_vf_config_msg(struct i40evf_adapter *adapter)
 151 {
 152         u32 caps;
 153
 154         adapter->current_op = I40E_VIRTCHNL_OP_GET_VF_RESOURCES;
 155         adapter->aq_required &= ~I40EVF_FLAG_AQ_GET_CONFIG;
 156         caps = I40E_VIRTCHNL_VF_OFFLOAD_L2 |
 157                I40E_VIRTCHNL_VF_OFFLOAD_RSS_AQ |
 158                I40E_VIRTCHNL_VF_OFFLOAD_RSS_REG |
 159                I40E_VIRTCHNL_VF_OFFLOAD_VLAN;
 160         adapter->current_op = I40E_VIRTCHNL_OP_GET_VF_RESOURCES;
 161         adapter->aq_required &= ~I40EVF_FLAG_AQ_GET_CONFIG;
 162         if (PF_IS_V11(adapter))
 163                 return i40evf_send_pf_msg(adapter,
 164                                           I40E_VIRTCHNL_OP_GET_VF_RESOURCES,
 165                                           (u8 *)&caps, sizeof(caps));
 166         else
 167                 return i40evf_send_pf_msg(adapter,
 168                                           I40E_VIRTCHNL_OP_GET_VF_RESOURCES,
 169                                           NULL, 0);
 170 }
 171
 172 /**
 173  * i40evf_get_vf_config
 174  * @hw: pointer to the hardware structure
 175  * @len: length of buffer
 176  *
 177  * Get VF configuration from PF and populate hw structure. Must be called after
 178  * admin queue is initialized. Busy waits until response is received from PF,
 179  * with maximum timeout. Response from PF is returned in the buffer for further
 180  * processing by the caller.
 181  **/
 182 int i40evf_get_vf_config(struct i40evf_adapter *adapter)
 183 {
 184         struct i40e_hw *hw = &adapter->hw;
 185         struct i40e_arq_event_info event;
 186         enum i40e_virtchnl_ops op;
 187         i40e_status err;
 188         u16 len;
 189
 190         len =  sizeof(struct i40e_virtchnl_vf_resource) +
 191                 I40E_MAX_VF_VSI * sizeof(struct i40e_virtchnl_vsi_resource);
 192         event.buf_len = len;
 193         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
 194         if (!event.msg_buf) {
 195                 err = -ENOMEM;
 196                 goto out;
 197         }
 198
 199         while (1) {
 200                 /* When the AQ is empty, i40evf_clean_arq_element will return
 201                  * nonzero and this loop will terminate.
 202                  */
 203                 err = i40evf_clean_arq_element(hw, &event, NULL);
 204                 if (err)
 205                         goto out_alloc;
 206                 op =
 207                     (enum i40e_virtchnl_ops)le32_to_cpu(event.desc.cookie_high);
 208                 if (op == I40E_VIRTCHNL_OP_GET_VF_RESOURCES)
 209                         break;
 210         }
 211
 212         err = (i40e_status)le32_to_cpu(event.desc.cookie_low);
 213         memcpy(adapter->vf_res, event.msg_buf, min(event.msg_len, len));
 214
 215         i40e_vf_parse_hw_config(hw, adapter->vf_res);
 216 out_alloc:
 217         kfree(event.msg_buf);
 218 out:
 219         return err;
 220 }
 221
 222 /**
 223  * i40evf_configure_queues
 224  * @adapter: adapter structure
 225  *
 226  * Request that the PF set up our (previously allocated) queues.
 227  **/
 228 void i40evf_configure_queues(struct i40evf_adapter *adapter)
 229 {
 230         struct i40e_virtchnl_vsi_queue_config_info *vqci;
 231         struct i40e_virtchnl_queue_pair_info *vqpi;
 232         int pairs = adapter->num_active_queues;
 233         int i, len;
 234
 235         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 236                 /* bail because we already have a command pending */
 237                 dev_err(&adapter->pdev->dev, "Cannot configure queues, command %d pending\n",
 238                         adapter->current_op);
 239                 return;
 240         }
 241         adapter->current_op = I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES;
 242         len = sizeof(struct i40e_virtchnl_vsi_queue_config_info) +
 243                        (sizeof(struct i40e_virtchnl_queue_pair_info) * pairs);
 244         vqci = kzalloc(len, GFP_ATOMIC);
 245         if (!vqci)
 246                 return;
 247
 248         vqci->vsi_id = adapter->vsi_res->vsi_id;
 249         vqci->num_queue_pairs = pairs;
 250         vqpi = vqci->qpair;
 251         /* Size check is not needed here - HW max is 16 queue pairs, and we
 252          * can fit info for 31 of them into the AQ buffer before it overflows.
 253          */
 254         for (i = 0; i < pairs; i++) {
 255                 vqpi->txq.vsi_id = vqci->vsi_id;
 256                 vqpi->txq.queue_id = i;
 257                 vqpi->txq.ring_len = adapter->tx_rings[i]->count;
 258                 vqpi->txq.dma_ring_addr = adapter->tx_rings[i]->dma;
 259                 vqpi->txq.headwb_enabled = 1;
 260                 vqpi->txq.dma_headwb_addr = vqpi->txq.dma_ring_addr +
 261                     (vqpi->txq.ring_len * sizeof(struct i40e_tx_desc));
 262
 263                 vqpi->rxq.vsi_id = vqci->vsi_id;
 264                 vqpi->rxq.queue_id = i;
 265                 vqpi->rxq.ring_len = adapter->rx_rings[i]->count;
 266                 vqpi->rxq.dma_ring_addr = adapter->rx_rings[i]->dma;
 267                 vqpi->rxq.max_pkt_size = adapter->netdev->mtu
 268                                         + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 269                 vqpi->rxq.databuffer_size = adapter->rx_rings[i]->rx_buf_len;
 270                 vqpi++;
 271         }
 272
 273         adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 274         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES,
 275                            (u8 *)vqci, len);
 276         kfree(vqci);
 277 }
 278
 279 /**
 280  * i40evf_enable_queues
 281  * @adapter: adapter structure
 282  *
 283  * Request that the PF enable all of our queues.
 284  **/
 285 void i40evf_enable_queues(struct i40evf_adapter *adapter)
 286 {
 287         struct i40e_virtchnl_queue_select vqs;
 288
 289         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 290                 /* bail because we already have a command pending */
 291                 dev_err(&adapter->pdev->dev, "Cannot enable queues, command %d pending\n",
 292                         adapter->current_op);
 293                 return;
 294         }
 295         adapter->current_op = I40E_VIRTCHNL_OP_ENABLE_QUEUES;
 296         vqs.vsi_id = adapter->vsi_res->vsi_id;
 297         vqs.tx_queues = BIT(adapter->num_active_queues) - 1;
 298         vqs.rx_queues = vqs.tx_queues;
 299         adapter->aq_required &= ~I40EVF_FLAG_AQ_ENABLE_QUEUES;
 300         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_ENABLE_QUEUES,
 301                            (u8 *)&vqs, sizeof(vqs));
 302 }
 303
 304 /**
 305  * i40evf_disable_queues
 306  * @adapter: adapter structure
 307  *
 308  * Request that the PF disable all of our queues.
 309  **/
 310 void i40evf_disable_queues(struct i40evf_adapter *adapter)
 311 {
 312         struct i40e_virtchnl_queue_select vqs;
 313
 314         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 315                 /* bail because we already have a command pending */
 316                 dev_err(&adapter->pdev->dev, "Cannot disable queues, command %d pending\n",
 317                         adapter->current_op);
 318                 return;
 319         }
 320         adapter->current_op = I40E_VIRTCHNL_OP_DISABLE_QUEUES;
 321         vqs.vsi_id = adapter->vsi_res->vsi_id;
 322         vqs.tx_queues = BIT(adapter->num_active_queues) - 1;
 323         vqs.rx_queues = vqs.tx_queues;
 324         adapter->aq_required &= ~I40EVF_FLAG_AQ_DISABLE_QUEUES;
 325         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_DISABLE_QUEUES,
 326                            (u8 *)&vqs, sizeof(vqs));
 327 }
 328
 329 /**
 330  * i40evf_map_queues
 331  * @adapter: adapter structure
 332  *
 333  * Request that the PF map queues to interrupt vectors. Misc causes, including
 334  * admin queue, are always mapped to vector 0.
 335  **/
 336 void i40evf_map_queues(struct i40evf_adapter *adapter)
 337 {
 338         struct i40e_virtchnl_irq_map_info *vimi;
 339         int v_idx, q_vectors, len;
 340         struct i40e_q_vector *q_vector;
 341
 342         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 343                 /* bail because we already have a command pending */
 344                 dev_err(&adapter->pdev->dev, "Cannot map queues to vectors, command %d pending\n",
 345                         adapter->current_op);
 346                 return;
 347         }
 348         adapter->current_op = I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP;
 349
 350         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 351
 352         len = sizeof(struct i40e_virtchnl_irq_map_info) +
 353               (adapter->num_msix_vectors *
 354                 sizeof(struct i40e_virtchnl_vector_map));
 355         vimi = kzalloc(len, GFP_ATOMIC);
 356         if (!vimi)
 357                 return;
 358
 359         vimi->num_vectors = adapter->num_msix_vectors;
 360         /* Queue vectors first */
 361         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
 362                 q_vector = adapter->q_vector[v_idx];
 363                 vimi->vecmap[v_idx].vsi_id = adapter->vsi_res->vsi_id;
 364                 vimi->vecmap[v_idx].vector_id = v_idx + NONQ_VECS;
 365                 vimi->vecmap[v_idx].txq_map = q_vector->ring_mask;
 366                 vimi->vecmap[v_idx].rxq_map = q_vector->ring_mask;
 367         }
 368         /* Misc vector last - this is only for AdminQ messages */
 369         vimi->vecmap[v_idx].vsi_id = adapter->vsi_res->vsi_id;
 370         vimi->vecmap[v_idx].vector_id = 0;
 371         vimi->vecmap[v_idx].txq_map = 0;
 372         vimi->vecmap[v_idx].rxq_map = 0;
 373
 374         adapter->aq_required &= ~I40EVF_FLAG_AQ_MAP_VECTORS;
 375         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP,
 376                            (u8 *)vimi, len);
 377         kfree(vimi);
 378 }
 379
 380 /**
 381  * i40evf_add_ether_addrs
 382  * @adapter: adapter structure
 383  * @addrs: the MAC address filters to add (contiguous)
 384  * @count: number of filters
 385  *
 386  * Request that the PF add one or more addresses to our filters.
 387  **/
 388 void i40evf_add_ether_addrs(struct i40evf_adapter *adapter)
 389 {
 390         struct i40e_virtchnl_ether_addr_list *veal;
 391         int len, i = 0, count = 0;
 392         struct i40evf_mac_filter *f;
 393
 394         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 395                 /* bail because we already have a command pending */
 396                 dev_err(&adapter->pdev->dev, "Cannot add filters, command %d pending\n",
 397                         adapter->current_op);
 398                 return;
 399         }
 400         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 401                 if (f->add)
 402                         count++;
 403         }
 404         if (!count) {
 405                 adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 406                 return;
 407         }
 408         adapter->current_op = I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS;
 409
 410         len = sizeof(struct i40e_virtchnl_ether_addr_list) +
 411               (count * sizeof(struct i40e_virtchnl_ether_addr));
 412         if (len > I40EVF_MAX_AQ_BUF_SIZE) {
 413                 dev_warn(&adapter->pdev->dev, "Too many add MAC changes in one request\n");
 414                 count = (I40EVF_MAX_AQ_BUF_SIZE -
 415                          sizeof(struct i40e_virtchnl_ether_addr_list)) /
 416                         sizeof(struct i40e_virtchnl_ether_addr);
 417                 len = I40EVF_MAX_AQ_BUF_SIZE;
 418         }
 419
 420         veal = kzalloc(len, GFP_ATOMIC);
 421         if (!veal)
 422                 return;
 423
 424         veal->vsi_id = adapter->vsi_res->vsi_id;
 425         veal->num_elements = count;
 426         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 427                 if (f->add) {
 428                         ether_addr_copy(veal->list[i].addr, f->macaddr);
 429                         i++;
 430                         f->add = false;
 431                 }
 432         }
 433         adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 434         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS,
 435                            (u8 *)veal, len);
 436         kfree(veal);
 437 }
 438
 439 /**
 440  * i40evf_del_ether_addrs
 441  * @adapter: adapter structure
 442  * @addrs: the MAC address filters to remove (contiguous)
 443  * @count: number of filtes
 444  *
 445  * Request that the PF remove one or more addresses from our filters.
 446  **/
 447 void i40evf_del_ether_addrs(struct i40evf_adapter *adapter)
 448 {
 449         struct i40e_virtchnl_ether_addr_list *veal;
 450         struct i40evf_mac_filter *f, *ftmp;
 451         int len, i = 0, count = 0;
 452
 453         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 454                 /* bail because we already have a command pending */
 455                 dev_err(&adapter->pdev->dev, "Cannot remove filters, command %d pending\n",
 456                         adapter->current_op);
 457                 return;
 458         }
 459         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 460                 if (f->remove)
 461                         count++;
 462         }
 463         if (!count) {
 464                 adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 465                 return;
 466         }
 467         adapter->current_op = I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS;
 468
 469         len = sizeof(struct i40e_virtchnl_ether_addr_list) +
 470               (count * sizeof(struct i40e_virtchnl_ether_addr));
 471         if (len > I40EVF_MAX_AQ_BUF_SIZE) {
 472                 dev_warn(&adapter->pdev->dev, "Too many delete MAC changes in one request\n");
 473                 count = (I40EVF_MAX_AQ_BUF_SIZE -
 474                          sizeof(struct i40e_virtchnl_ether_addr_list)) /
 475                         sizeof(struct i40e_virtchnl_ether_addr);
 476                 len = I40EVF_MAX_AQ_BUF_SIZE;
 477         }
 478         veal = kzalloc(len, GFP_ATOMIC);
 479         if (!veal)
 480                 return;
 481
 482         veal->vsi_id = adapter->vsi_res->vsi_id;
 483         veal->num_elements = count;
 484         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 485                 if (f->remove) {
 486                         ether_addr_copy(veal->list[i].addr, f->macaddr);
 487                         i++;
 488                         list_del(&f->list);
 489                         kfree(f);
 490                 }
 491         }
 492         adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 493         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS,
 494                            (u8 *)veal, len);
 495         kfree(veal);
 496 }
 497
 498 /**
 499  * i40evf_add_vlans
 500  * @adapter: adapter structure
 501  * @vlans: the VLANs to add
 502  * @count: number of VLANs
 503  *
 504  * Request that the PF add one or more VLAN filters to our VSI.
 505  **/
 506 void i40evf_add_vlans(struct i40evf_adapter *adapter)
 507 {
 508         struct i40e_virtchnl_vlan_filter_list *vvfl;
 509         int len, i = 0, count = 0;
 510         struct i40evf_vlan_filter *f;
 511
 512         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 513                 /* bail because we already have a command pending */
 514                 dev_err(&adapter->pdev->dev, "Cannot add VLANs, command %d pending\n",
 515                         adapter->current_op);
 516                 return;
 517         }
 518
 519         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 520                 if (f->add)
 521                         count++;
 522         }
 523         if (!count) {
 524                 adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 525                 return;
 526         }
 527         adapter->current_op = I40E_VIRTCHNL_OP_ADD_VLAN;
 528
 529         len = sizeof(struct i40e_virtchnl_vlan_filter_list) +
 530               (count * sizeof(u16));
 531         if (len > I40EVF_MAX_AQ_BUF_SIZE) {
 532                 dev_warn(&adapter->pdev->dev, "Too many add VLAN changes in one request\n");
 533                 count = (I40EVF_MAX_AQ_BUF_SIZE -
 534                          sizeof(struct i40e_virtchnl_vlan_filter_list)) /
 535                         sizeof(u16);
 536                 len = I40EVF_MAX_AQ_BUF_SIZE;
 537         }
 538         vvfl = kzalloc(len, GFP_ATOMIC);
 539         if (!vvfl)
 540                 return;
 541
 542         vvfl->vsi_id = adapter->vsi_res->vsi_id;
 543         vvfl->num_elements = count;
 544         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 545                 if (f->add) {
 546                         vvfl->vlan_id[i] = f->vlan;
 547                         i++;
 548                         f->add = false;
 549                 }
 550         }
 551         adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 552         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_ADD_VLAN, (u8 *)vvfl, len);
 553         kfree(vvfl);
 554 }
 555
 556 /**
 557  * i40evf_del_vlans
 558  * @adapter: adapter structure
 559  * @vlans: the VLANs to remove
 560  * @count: number of VLANs
 561  *
 562  * Request that the PF remove one or more VLAN filters from our VSI.
 563  **/
 564 void i40evf_del_vlans(struct i40evf_adapter *adapter)
 565 {
 566         struct i40e_virtchnl_vlan_filter_list *vvfl;
 567         struct i40evf_vlan_filter *f, *ftmp;
 568         int len, i = 0, count = 0;
 569
 570         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 571                 /* bail because we already have a command pending */
 572                 dev_err(&adapter->pdev->dev, "Cannot remove VLANs, command %d pending\n",
 573                         adapter->current_op);
 574                 return;
 575         }
 576
 577         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 578                 if (f->remove)
 579                         count++;
 580         }
 581         if (!count) {
 582                 adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 583                 return;
 584         }
 585         adapter->current_op = I40E_VIRTCHNL_OP_DEL_VLAN;
 586
 587         len = sizeof(struct i40e_virtchnl_vlan_filter_list) +
 588               (count * sizeof(u16));
 589         if (len > I40EVF_MAX_AQ_BUF_SIZE) {
 590                 dev_warn(&adapter->pdev->dev, "Too many delete VLAN changes in one request\n");
 591                 count = (I40EVF_MAX_AQ_BUF_SIZE -
 592                          sizeof(struct i40e_virtchnl_vlan_filter_list)) /
 593                         sizeof(u16);
 594                 len = I40EVF_MAX_AQ_BUF_SIZE;
 595         }
 596         vvfl = kzalloc(len, GFP_ATOMIC);
 597         if (!vvfl)
 598                 return;
 599
 600         vvfl->vsi_id = adapter->vsi_res->vsi_id;
 601         vvfl->num_elements = count;
 602         list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
 603                 if (f->remove) {
 604                         vvfl->vlan_id[i] = f->vlan;
 605                         i++;
 606                         list_del(&f->list);
 607                         kfree(f);
 608                 }
 609         }
 610         adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 611         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_DEL_VLAN, (u8 *)vvfl, len);
 612         kfree(vvfl);
 613 }
 614
 615 /**
 616  * i40evf_set_promiscuous
 617  * @adapter: adapter structure
 618  * @flags: bitmask to control unicast/multicast promiscuous.
 619  *
 620  * Request that the PF enable promiscuous mode for our VSI.
 621  **/
 622 void i40evf_set_promiscuous(struct i40evf_adapter *adapter, int flags)
 623 {
 624         struct i40e_virtchnl_promisc_info vpi;
 625
 626         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 627                 /* bail because we already have a command pending */
 628                 dev_err(&adapter->pdev->dev, "Cannot set promiscuous mode, command %d pending\n",
 629                         adapter->current_op);
 630                 return;
 631         }
 632         adapter->current_op = I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE;
 633         vpi.vsi_id = adapter->vsi_res->vsi_id;
 634         vpi.flags = flags;
 635         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE,
 636                            (u8 *)&vpi, sizeof(vpi));
 637 }
 638
 639 /**
 640  * i40evf_request_stats
 641  * @adapter: adapter structure
 642  *
 643  * Request VSI statistics from PF.
 644  **/
 645 void i40evf_request_stats(struct i40evf_adapter *adapter)
 646 {
 647         struct i40e_virtchnl_queue_select vqs;
 648
 649         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 650                 /* no error message, this isn't crucial */
 651                 return;
 652         }
 653         adapter->current_op = I40E_VIRTCHNL_OP_GET_STATS;
 654         vqs.vsi_id = adapter->vsi_res->vsi_id;
 655         /* queue maps are ignored for this message - only the vsi is used */
 656         if (i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_GET_STATS,
 657                                (u8 *)&vqs, sizeof(vqs)))
 658                 /* if the request failed, don't lock out others */
 659                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
 660 }
 661 /**
 662  * i40evf_request_reset
 663  * @adapter: adapter structure
 664  *
 665  * Request that the PF reset this VF. No response is expected.
 666  **/
 667 void i40evf_request_reset(struct i40evf_adapter *adapter)
 668 {
 669         /* Don't check CURRENT_OP - this is always higher priority */
 670         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_RESET_VF, NULL, 0);
 671         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
 672 }
 673
 674 /**
 675  * i40evf_virtchnl_completion
 676  * @adapter: adapter structure
 677  * @v_opcode: opcode sent by PF
 678  * @v_retval: retval sent by PF
 679  * @msg: message sent by PF
 680  * @msglen: message length
 681  *
 682  * Asynchronous completion function for admin queue messages. Rather than busy
 683  * wait, we fire off our requests and assume that no errors will be returned.
 684  * This function handles the reply messages.
 685  **/
 686 void i40evf_virtchnl_completion(struct i40evf_adapter *adapter,
 687                                 enum i40e_virtchnl_ops v_opcode,
 688                                 i40e_status v_retval,
 689                                 u8 *msg, u16 msglen)
 690 {
 691         struct net_device *netdev = adapter->netdev;
 692
 693         if (v_opcode == I40E_VIRTCHNL_OP_EVENT) {
 694                 struct i40e_virtchnl_pf_event *vpe =
 695                         (struct i40e_virtchnl_pf_event *)msg;
 696                 switch (vpe->event) {
 697                 case I40E_VIRTCHNL_EVENT_LINK_CHANGE:
 698                         adapter->link_up =
 699                                 vpe->event_data.link_event.link_status;
 700                         if (adapter->link_up && !netif_carrier_ok(netdev)) {
 701                                 dev_info(&adapter->pdev->dev, "NIC Link is Up\n");
 702                                 netif_carrier_on(netdev);
 703                                 netif_tx_wake_all_queues(netdev);
 704                         } else if (!adapter->link_up) {
 705                                 dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
 706                                 netif_carrier_off(netdev);
 707                                 netif_tx_stop_all_queues(netdev);
 708                         }
 709                         break;
 710                 case I40E_VIRTCHNL_EVENT_RESET_IMPENDING:
 711                         dev_info(&adapter->pdev->dev, "PF reset warning received\n");
 712                         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
 713                                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
 714                                 dev_info(&adapter->pdev->dev, "Scheduling reset task\n");
 715                                 schedule_work(&adapter->reset_task);
 716                         }
 717                         break;
 718                 default:
 719                         dev_err(&adapter->pdev->dev, "Unknown event %d from PF\n",
 720                                 vpe->event);
 721                         break;
 722                 }
 723                 return;
 724         }
 725         if (v_retval) {
 726                 dev_err(&adapter->pdev->dev, "PF returned error %d (%s) to our request %d\n",
 727                         v_retval, i40evf_stat_str(&adapter->hw, v_retval),
 728                         v_opcode);
 729         }
 730         switch (v_opcode) {
 731         case I40E_VIRTCHNL_OP_GET_STATS: {
 732                 struct i40e_eth_stats *stats =
 733                         (struct i40e_eth_stats *)msg;
 734                 adapter->net_stats.rx_packets = stats->rx_unicast +
 735                                                  stats->rx_multicast +
 736                                                  stats->rx_broadcast;
 737                 adapter->net_stats.tx_packets = stats->tx_unicast +
 738                                                  stats->tx_multicast +
 739                                                  stats->tx_broadcast;
 740                 adapter->net_stats.rx_bytes = stats->rx_bytes;
 741                 adapter->net_stats.tx_bytes = stats->tx_bytes;
 742                 adapter->net_stats.tx_errors = stats->tx_errors;
 743                 adapter->net_stats.rx_dropped = stats->rx_discards;
 744                 adapter->net_stats.tx_dropped = stats->tx_discards;
 745                 adapter->current_stats = *stats;
 746                 }
 747                 break;
 748         case I40E_VIRTCHNL_OP_GET_VF_RESOURCES: {
 749                 u16 len = sizeof(struct i40e_virtchnl_vf_resource) +
 750                           I40E_MAX_VF_VSI *
 751                           sizeof(struct i40e_virtchnl_vsi_resource);
 752                 memcpy(adapter->vf_res, msg, min(msglen, len));
 753                 i40e_vf_parse_hw_config(&adapter->hw, adapter->vf_res);
 754                 /* restore current mac address */
 755                 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
 756                 i40evf_process_config(adapter);
 757                 }
 758                 break;
 759         case I40E_VIRTCHNL_OP_ENABLE_QUEUES:
 760                 /* enable transmits */
 761                 i40evf_irq_enable(adapter, true);
 762                 netif_tx_start_all_queues(adapter->netdev);
 763                 netif_carrier_on(adapter->netdev);
 764                 break;
 765         case I40E_VIRTCHNL_OP_DISABLE_QUEUES:
 766                 i40evf_free_all_tx_resources(adapter);
 767                 i40evf_free_all_rx_resources(adapter);
 768                 break;
 769         case I40E_VIRTCHNL_OP_VERSION:
 770         case I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP:
 771                 /* Don't display an error if we get these out of sequence.
 772                  * If the firmware needed to get kicked, we'll get these and
 773                  * it's no problem.
 774                  */
 775                 if (v_opcode != adapter->current_op)
 776                         return;
 777                 break;
 778         default:
 779                 if (v_opcode != adapter->current_op)
 780                         dev_warn(&adapter->pdev->dev, "Expected response %d from PF, received %d\n",
 781                                  adapter->current_op, v_opcode);
 782                 break;
 783         } /* switch v_opcode */
 784         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
 785 }