kernel/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                I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR;
 161         adapter->current_op = I40E_VIRTCHNL_OP_GET_VF_RESOURCES;
 162         adapter->aq_required &= ~I40EVF_FLAG_AQ_GET_CONFIG;
 163         if (PF_IS_V11(adapter))
 164                 return i40evf_send_pf_msg(adapter,
 165                                           I40E_VIRTCHNL_OP_GET_VF_RESOURCES,
 166                                           (u8 *)&caps, sizeof(caps));
 167         else
 168                 return i40evf_send_pf_msg(adapter,
 169                                           I40E_VIRTCHNL_OP_GET_VF_RESOURCES,
 170                                           NULL, 0);
 171 }
 172
 173 /**
 174  * i40evf_get_vf_config
 175  * @hw: pointer to the hardware structure
 176  * @len: length of buffer
 177  *
 178  * Get VF configuration from PF and populate hw structure. Must be called after
 179  * admin queue is initialized. Busy waits until response is received from PF,
 180  * with maximum timeout. Response from PF is returned in the buffer for further
 181  * processing by the caller.
 182  **/
 183 int i40evf_get_vf_config(struct i40evf_adapter *adapter)
 184 {
 185         struct i40e_hw *hw = &adapter->hw;
 186         struct i40e_arq_event_info event;
 187         enum i40e_virtchnl_ops op;
 188         i40e_status err;
 189         u16 len;
 190
 191         len =  sizeof(struct i40e_virtchnl_vf_resource) +
 192                 I40E_MAX_VF_VSI * sizeof(struct i40e_virtchnl_vsi_resource);
 193         event.buf_len = len;
 194         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
 195         if (!event.msg_buf) {
 196                 err = -ENOMEM;
 197                 goto out;
 198         }
 199
 200         while (1) {
 201                 /* When the AQ is empty, i40evf_clean_arq_element will return
 202                  * nonzero and this loop will terminate.
 203                  */
 204                 err = i40evf_clean_arq_element(hw, &event, NULL);
 205                 if (err)
 206                         goto out_alloc;
 207                 op =
 208                     (enum i40e_virtchnl_ops)le32_to_cpu(event.desc.cookie_high);
 209                 if (op == I40E_VIRTCHNL_OP_GET_VF_RESOURCES)
 210                         break;
 211         }
 212
 213         err = (i40e_status)le32_to_cpu(event.desc.cookie_low);
 214         memcpy(adapter->vf_res, event.msg_buf, min(event.msg_len, len));
 215
 216         i40e_vf_parse_hw_config(hw, adapter->vf_res);
 217 out_alloc:
 218         kfree(event.msg_buf);
 219 out:
 220         return err;
 221 }
 222
 223 /**
 224  * i40evf_configure_queues
 225  * @adapter: adapter structure
 226  *
 227  * Request that the PF set up our (previously allocated) queues.
 228  **/
 229 void i40evf_configure_queues(struct i40evf_adapter *adapter)
 230 {
 231         struct i40e_virtchnl_vsi_queue_config_info *vqci;
 232         struct i40e_virtchnl_queue_pair_info *vqpi;
 233         int pairs = adapter->num_active_queues;
 234         int i, len;
 235
 236         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 237                 /* bail because we already have a command pending */
 238                 dev_err(&adapter->pdev->dev, "Cannot configure queues, command %d pending\n",
 239                         adapter->current_op);
 240                 return;
 241         }
 242         adapter->current_op = I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES;
 243         len = sizeof(struct i40e_virtchnl_vsi_queue_config_info) +
 244                        (sizeof(struct i40e_virtchnl_queue_pair_info) * pairs);
 245         vqci = kzalloc(len, GFP_ATOMIC);
 246         if (!vqci)
 247                 return;
 248
 249         vqci->vsi_id = adapter->vsi_res->vsi_id;
 250         vqci->num_queue_pairs = pairs;
 251         vqpi = vqci->qpair;
 252         /* Size check is not needed here - HW max is 16 queue pairs, and we
 253          * can fit info for 31 of them into the AQ buffer before it overflows.
 254          */
 255         for (i = 0; i < pairs; i++) {
 256                 vqpi->txq.vsi_id = vqci->vsi_id;
 257                 vqpi->txq.queue_id = i;
 258                 vqpi->txq.ring_len = adapter->tx_rings[i]->count;
 259                 vqpi->txq.dma_ring_addr = adapter->tx_rings[i]->dma;
 260                 vqpi->txq.headwb_enabled = 1;
 261                 vqpi->txq.dma_headwb_addr = vqpi->txq.dma_ring_addr +
 262                     (vqpi->txq.ring_len * sizeof(struct i40e_tx_desc));
 263
 264                 vqpi->rxq.vsi_id = vqci->vsi_id;
 265                 vqpi->rxq.queue_id = i;
 266                 vqpi->rxq.ring_len = adapter->rx_rings[i]->count;
 267                 vqpi->rxq.dma_ring_addr = adapter->rx_rings[i]->dma;
 268                 vqpi->rxq.max_pkt_size = adapter->netdev->mtu
 269                                         + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 270                 vqpi->rxq.databuffer_size = adapter->rx_rings[i]->rx_buf_len;
 271                 vqpi++;
 272         }
 273
 274         adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 275         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES,
 276                            (u8 *)vqci, len);
 277         kfree(vqci);
 278 }
 279
 280 /**
 281  * i40evf_enable_queues
 282  * @adapter: adapter structure
 283  *
 284  * Request that the PF enable all of our queues.
 285  **/
 286 void i40evf_enable_queues(struct i40evf_adapter *adapter)
 287 {
 288         struct i40e_virtchnl_queue_select vqs;
 289
 290         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 291                 /* bail because we already have a command pending */
 292                 dev_err(&adapter->pdev->dev, "Cannot enable queues, command %d pending\n",
 293                         adapter->current_op);
 294                 return;
 295         }
 296         adapter->current_op = I40E_VIRTCHNL_OP_ENABLE_QUEUES;
 297         vqs.vsi_id = adapter->vsi_res->vsi_id;
 298         vqs.tx_queues = BIT(adapter->num_active_queues) - 1;
 299         vqs.rx_queues = vqs.tx_queues;
 300         adapter->aq_required &= ~I40EVF_FLAG_AQ_ENABLE_QUEUES;
 301         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_ENABLE_QUEUES,
 302                            (u8 *)&vqs, sizeof(vqs));
 303 }
 304
 305 /**
 306  * i40evf_disable_queues
 307  * @adapter: adapter structure
 308  *
 309  * Request that the PF disable all of our queues.
 310  **/
 311 void i40evf_disable_queues(struct i40evf_adapter *adapter)
 312 {
 313         struct i40e_virtchnl_queue_select vqs;
 314
 315         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 316                 /* bail because we already have a command pending */
 317                 dev_err(&adapter->pdev->dev, "Cannot disable queues, command %d pending\n",
 318                         adapter->current_op);
 319                 return;
 320         }
 321         adapter->current_op = I40E_VIRTCHNL_OP_DISABLE_QUEUES;
 322         vqs.vsi_id = adapter->vsi_res->vsi_id;
 323         vqs.tx_queues = BIT(adapter->num_active_queues) - 1;
 324         vqs.rx_queues = vqs.tx_queues;
 325         adapter->aq_required &= ~I40EVF_FLAG_AQ_DISABLE_QUEUES;
 326         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_DISABLE_QUEUES,
 327                            (u8 *)&vqs, sizeof(vqs));
 328 }
 329
 330 /**
 331  * i40evf_map_queues
 332  * @adapter: adapter structure
 333  *
 334  * Request that the PF map queues to interrupt vectors. Misc causes, including
 335  * admin queue, are always mapped to vector 0.
 336  **/
 337 void i40evf_map_queues(struct i40evf_adapter *adapter)
 338 {
 339         struct i40e_virtchnl_irq_map_info *vimi;
 340         int v_idx, q_vectors, len;
 341         struct i40e_q_vector *q_vector;
 342
 343         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 344                 /* bail because we already have a command pending */
 345                 dev_err(&adapter->pdev->dev, "Cannot map queues to vectors, command %d pending\n",
 346                         adapter->current_op);
 347                 return;
 348         }
 349         adapter->current_op = I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP;
 350
 351         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 352
 353         len = sizeof(struct i40e_virtchnl_irq_map_info) +
 354               (adapter->num_msix_vectors *
 355                 sizeof(struct i40e_virtchnl_vector_map));
 356         vimi = kzalloc(len, GFP_ATOMIC);
 357         if (!vimi)
 358                 return;
 359
 360         vimi->num_vectors = adapter->num_msix_vectors;
 361         /* Queue vectors first */
 362         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
 363                 q_vector = adapter->q_vector[v_idx];
 364                 vimi->vecmap[v_idx].vsi_id = adapter->vsi_res->vsi_id;
 365                 vimi->vecmap[v_idx].vector_id = v_idx + NONQ_VECS;
 366                 vimi->vecmap[v_idx].txq_map = q_vector->ring_mask;
 367                 vimi->vecmap[v_idx].rxq_map = q_vector->ring_mask;
 368         }
 369         /* Misc vector last - this is only for AdminQ messages */
 370         vimi->vecmap[v_idx].vsi_id = adapter->vsi_res->vsi_id;
 371         vimi->vecmap[v_idx].vector_id = 0;
 372         vimi->vecmap[v_idx].txq_map = 0;
 373         vimi->vecmap[v_idx].rxq_map = 0;
 374
 375         adapter->aq_required &= ~I40EVF_FLAG_AQ_MAP_VECTORS;
 376         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP,
 377                            (u8 *)vimi, len);
 378         kfree(vimi);
 379 }
 380
 381 /**
 382  * i40evf_add_ether_addrs
 383  * @adapter: adapter structure
 384  * @addrs: the MAC address filters to add (contiguous)
 385  * @count: number of filters
 386  *
 387  * Request that the PF add one or more addresses to our filters.
 388  **/
 389 void i40evf_add_ether_addrs(struct i40evf_adapter *adapter)
 390 {
 391         struct i40e_virtchnl_ether_addr_list *veal;
 392         int len, i = 0, count = 0;
 393         struct i40evf_mac_filter *f;
 394         bool more = false;
 395
 396         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 397                 /* bail because we already have a command pending */
 398                 dev_err(&adapter->pdev->dev, "Cannot add filters, command %d pending\n",
 399                         adapter->current_op);
 400                 return;
 401         }
 402         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 403                 if (f->add)
 404                         count++;
 405         }
 406         if (!count) {
 407                 adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 408                 return;
 409         }
 410         adapter->current_op = I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS;
 411
 412         len = sizeof(struct i40e_virtchnl_ether_addr_list) +
 413               (count * sizeof(struct i40e_virtchnl_ether_addr));
 414         if (len > I40EVF_MAX_AQ_BUF_SIZE) {
 415                 dev_warn(&adapter->pdev->dev, "Too many add MAC changes in one request\n");
 416                 count = (I40EVF_MAX_AQ_BUF_SIZE -
 417                          sizeof(struct i40e_virtchnl_ether_addr_list)) /
 418                         sizeof(struct i40e_virtchnl_ether_addr);
 419                 len = sizeof(struct i40e_virtchnl_ether_addr_list) +
 420                       (count * sizeof(struct i40e_virtchnl_ether_addr));
 421                 more = true;
 422         }
 423
 424         veal = kzalloc(len, GFP_ATOMIC);
 425         if (!veal)
 426                 return;
 427
 428         veal->vsi_id = adapter->vsi_res->vsi_id;
 429         veal->num_elements = count;
 430         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 431                 if (f->add) {
 432                         ether_addr_copy(veal->list[i].addr, f->macaddr);
 433                         i++;
 434                         f->add = false;
 435                 }
 436         }
 437         if (!more)
 438                 adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 439         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS,
 440                            (u8 *)veal, len);
 441         kfree(veal);
 442 }
 443
 444 /**
 445  * i40evf_del_ether_addrs
 446  * @adapter: adapter structure
 447  * @addrs: the MAC address filters to remove (contiguous)
 448  * @count: number of filtes
 449  *
 450  * Request that the PF remove one or more addresses from our filters.
 451  **/
 452 void i40evf_del_ether_addrs(struct i40evf_adapter *adapter)
 453 {
 454         struct i40e_virtchnl_ether_addr_list *veal;
 455         struct i40evf_mac_filter *f, *ftmp;
 456         int len, i = 0, count = 0;
 457         bool more = false;
 458
 459         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 460                 /* bail because we already have a command pending */
 461                 dev_err(&adapter->pdev->dev, "Cannot remove filters, command %d pending\n",
 462                         adapter->current_op);
 463                 return;
 464         }
 465         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 466                 if (f->remove)
 467                         count++;
 468         }
 469         if (!count) {
 470                 adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 471                 return;
 472         }
 473         adapter->current_op = I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS;
 474
 475         len = sizeof(struct i40e_virtchnl_ether_addr_list) +
 476               (count * sizeof(struct i40e_virtchnl_ether_addr));
 477         if (len > I40EVF_MAX_AQ_BUF_SIZE) {
 478                 dev_warn(&adapter->pdev->dev, "Too many delete MAC changes in one request\n");
 479                 count = (I40EVF_MAX_AQ_BUF_SIZE -
 480                          sizeof(struct i40e_virtchnl_ether_addr_list)) /
 481                         sizeof(struct i40e_virtchnl_ether_addr);
 482                 len = sizeof(struct i40e_virtchnl_ether_addr_list) +
 483                       (count * sizeof(struct i40e_virtchnl_ether_addr));
 484                 more = true;
 485         }
 486         veal = kzalloc(len, GFP_ATOMIC);
 487         if (!veal)
 488                 return;
 489
 490         veal->vsi_id = adapter->vsi_res->vsi_id;
 491         veal->num_elements = count;
 492         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 493                 if (f->remove) {
 494                         ether_addr_copy(veal->list[i].addr, f->macaddr);
 495                         i++;
 496                         list_del(&f->list);
 497                         kfree(f);
 498                 }
 499         }
 500         if (!more)
 501                 adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 502         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS,
 503                            (u8 *)veal, len);
 504         kfree(veal);
 505 }
 506
 507 /**
 508  * i40evf_add_vlans
 509  * @adapter: adapter structure
 510  * @vlans: the VLANs to add
 511  * @count: number of VLANs
 512  *
 513  * Request that the PF add one or more VLAN filters to our VSI.
 514  **/
 515 void i40evf_add_vlans(struct i40evf_adapter *adapter)
 516 {
 517         struct i40e_virtchnl_vlan_filter_list *vvfl;
 518         int len, i = 0, count = 0;
 519         struct i40evf_vlan_filter *f;
 520         bool more = false;
 521
 522         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 523                 /* bail because we already have a command pending */
 524                 dev_err(&adapter->pdev->dev, "Cannot add VLANs, command %d pending\n",
 525                         adapter->current_op);
 526                 return;
 527         }
 528
 529         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 530                 if (f->add)
 531                         count++;
 532         }
 533         if (!count) {
 534                 adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 535                 return;
 536         }
 537         adapter->current_op = I40E_VIRTCHNL_OP_ADD_VLAN;
 538
 539         len = sizeof(struct i40e_virtchnl_vlan_filter_list) +
 540               (count * sizeof(u16));
 541         if (len > I40EVF_MAX_AQ_BUF_SIZE) {
 542                 dev_warn(&adapter->pdev->dev, "Too many add VLAN changes in one request\n");
 543                 count = (I40EVF_MAX_AQ_BUF_SIZE -
 544                          sizeof(struct i40e_virtchnl_vlan_filter_list)) /
 545                         sizeof(u16);
 546                 len = sizeof(struct i40e_virtchnl_vlan_filter_list) +
 547                       (count * sizeof(u16));
 548                 more = true;
 549         }
 550         vvfl = kzalloc(len, GFP_ATOMIC);
 551         if (!vvfl)
 552                 return;
 553
 554         vvfl->vsi_id = adapter->vsi_res->vsi_id;
 555         vvfl->num_elements = count;
 556         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 557                 if (f->add) {
 558                         vvfl->vlan_id[i] = f->vlan;
 559                         i++;
 560                         f->add = false;
 561                 }
 562         }
 563         if (!more)
 564                 adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 565         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_ADD_VLAN, (u8 *)vvfl, len);
 566         kfree(vvfl);
 567 }
 568
 569 /**
 570  * i40evf_del_vlans
 571  * @adapter: adapter structure
 572  * @vlans: the VLANs to remove
 573  * @count: number of VLANs
 574  *
 575  * Request that the PF remove one or more VLAN filters from our VSI.
 576  **/
 577 void i40evf_del_vlans(struct i40evf_adapter *adapter)
 578 {
 579         struct i40e_virtchnl_vlan_filter_list *vvfl;
 580         struct i40evf_vlan_filter *f, *ftmp;
 581         int len, i = 0, count = 0;
 582         bool more = false;
 583
 584         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 585                 /* bail because we already have a command pending */
 586                 dev_err(&adapter->pdev->dev, "Cannot remove VLANs, command %d pending\n",
 587                         adapter->current_op);
 588                 return;
 589         }
 590
 591         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 592                 if (f->remove)
 593                         count++;
 594         }
 595         if (!count) {
 596                 adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 597                 return;
 598         }
 599         adapter->current_op = I40E_VIRTCHNL_OP_DEL_VLAN;
 600
 601         len = sizeof(struct i40e_virtchnl_vlan_filter_list) +
 602               (count * sizeof(u16));
 603         if (len > I40EVF_MAX_AQ_BUF_SIZE) {
 604                 dev_warn(&adapter->pdev->dev, "Too many delete VLAN changes in one request\n");
 605                 count = (I40EVF_MAX_AQ_BUF_SIZE -
 606                          sizeof(struct i40e_virtchnl_vlan_filter_list)) /
 607                         sizeof(u16);
 608                 len = sizeof(struct i40e_virtchnl_vlan_filter_list) +
 609                       (count * sizeof(u16));
 610                 more = true;
 611         }
 612         vvfl = kzalloc(len, GFP_ATOMIC);
 613         if (!vvfl)
 614                 return;
 615
 616         vvfl->vsi_id = adapter->vsi_res->vsi_id;
 617         vvfl->num_elements = count;
 618         list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
 619                 if (f->remove) {
 620                         vvfl->vlan_id[i] = f->vlan;
 621                         i++;
 622                         list_del(&f->list);
 623                         kfree(f);
 624                 }
 625         }
 626         if (!more)
 627                 adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 628         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_DEL_VLAN, (u8 *)vvfl, len);
 629         kfree(vvfl);
 630 }
 631
 632 /**
 633  * i40evf_set_promiscuous
 634  * @adapter: adapter structure
 635  * @flags: bitmask to control unicast/multicast promiscuous.
 636  *
 637  * Request that the PF enable promiscuous mode for our VSI.
 638  **/
 639 void i40evf_set_promiscuous(struct i40evf_adapter *adapter, int flags)
 640 {
 641         struct i40e_virtchnl_promisc_info vpi;
 642
 643         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 644                 /* bail because we already have a command pending */
 645                 dev_err(&adapter->pdev->dev, "Cannot set promiscuous mode, command %d pending\n",
 646                         adapter->current_op);
 647                 return;
 648         }
 649         adapter->current_op = I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE;
 650         vpi.vsi_id = adapter->vsi_res->vsi_id;
 651         vpi.flags = flags;
 652         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE,
 653                            (u8 *)&vpi, sizeof(vpi));
 654 }
 655
 656 /**
 657  * i40evf_request_stats
 658  * @adapter: adapter structure
 659  *
 660  * Request VSI statistics from PF.
 661  **/
 662 void i40evf_request_stats(struct i40evf_adapter *adapter)
 663 {
 664         struct i40e_virtchnl_queue_select vqs;
 665
 666         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
 667                 /* no error message, this isn't crucial */
 668                 return;
 669         }
 670         adapter->current_op = I40E_VIRTCHNL_OP_GET_STATS;
 671         vqs.vsi_id = adapter->vsi_res->vsi_id;
 672         /* queue maps are ignored for this message - only the vsi is used */
 673         if (i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_GET_STATS,
 674                                (u8 *)&vqs, sizeof(vqs)))
 675                 /* if the request failed, don't lock out others */
 676                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
 677 }
 678 /**
 679  * i40evf_request_reset
 680  * @adapter: adapter structure
 681  *
 682  * Request that the PF reset this VF. No response is expected.
 683  **/
 684 void i40evf_request_reset(struct i40evf_adapter *adapter)
 685 {
 686         /* Don't check CURRENT_OP - this is always higher priority */
 687         i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_RESET_VF, NULL, 0);
 688         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
 689 }
 690
 691 /**
 692  * i40evf_virtchnl_completion
 693  * @adapter: adapter structure
 694  * @v_opcode: opcode sent by PF
 695  * @v_retval: retval sent by PF
 696  * @msg: message sent by PF
 697  * @msglen: message length
 698  *
 699  * Asynchronous completion function for admin queue messages. Rather than busy
 700  * wait, we fire off our requests and assume that no errors will be returned.
 701  * This function handles the reply messages.
 702  **/
 703 void i40evf_virtchnl_completion(struct i40evf_adapter *adapter,
 704                                 enum i40e_virtchnl_ops v_opcode,
 705                                 i40e_status v_retval,
 706                                 u8 *msg, u16 msglen)
 707 {
 708         struct net_device *netdev = adapter->netdev;
 709
 710         if (v_opcode == I40E_VIRTCHNL_OP_EVENT) {
 711                 struct i40e_virtchnl_pf_event *vpe =
 712                         (struct i40e_virtchnl_pf_event *)msg;
 713                 switch (vpe->event) {
 714                 case I40E_VIRTCHNL_EVENT_LINK_CHANGE:
 715                         adapter->link_up =
 716                                 vpe->event_data.link_event.link_status;
 717                         if (adapter->link_up && !netif_carrier_ok(netdev)) {
 718                                 dev_info(&adapter->pdev->dev, "NIC Link is Up\n");
 719                                 netif_carrier_on(netdev);
 720                                 netif_tx_wake_all_queues(netdev);
 721                         } else if (!adapter->link_up) {
 722                                 dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
 723                                 netif_carrier_off(netdev);
 724                                 netif_tx_stop_all_queues(netdev);
 725                         }
 726                         break;
 727                 case I40E_VIRTCHNL_EVENT_RESET_IMPENDING:
 728                         dev_info(&adapter->pdev->dev, "PF reset warning received\n");
 729                         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
 730                                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
 731                                 dev_info(&adapter->pdev->dev, "Scheduling reset task\n");
 732                                 schedule_work(&adapter->reset_task);
 733                         }
 734                         break;
 735                 default:
 736                         dev_err(&adapter->pdev->dev, "Unknown event %d from PF\n",
 737                                 vpe->event);
 738                         break;
 739                 }
 740                 return;
 741         }
 742         if (v_retval) {
 743                 dev_err(&adapter->pdev->dev, "PF returned error %d (%s) to our request %d\n",
 744                         v_retval, i40evf_stat_str(&adapter->hw, v_retval),
 745                         v_opcode);
 746         }
 747         switch (v_opcode) {
 748         case I40E_VIRTCHNL_OP_GET_STATS: {
 749                 struct i40e_eth_stats *stats =
 750                         (struct i40e_eth_stats *)msg;
 751                 adapter->net_stats.rx_packets = stats->rx_unicast +
 752                                                  stats->rx_multicast +
 753                                                  stats->rx_broadcast;
 754                 adapter->net_stats.tx_packets = stats->tx_unicast +
 755                                                  stats->tx_multicast +
 756                                                  stats->tx_broadcast;
 757                 adapter->net_stats.rx_bytes = stats->rx_bytes;
 758                 adapter->net_stats.tx_bytes = stats->tx_bytes;
 759                 adapter->net_stats.tx_errors = stats->tx_errors;
 760                 adapter->net_stats.rx_dropped = stats->rx_discards;
 761                 adapter->net_stats.tx_dropped = stats->tx_discards;
 762                 adapter->current_stats = *stats;
 763                 }
 764                 break;
 765         case I40E_VIRTCHNL_OP_GET_VF_RESOURCES: {
 766                 u16 len = sizeof(struct i40e_virtchnl_vf_resource) +
 767                           I40E_MAX_VF_VSI *
 768                           sizeof(struct i40e_virtchnl_vsi_resource);
 769                 memcpy(adapter->vf_res, msg, min(msglen, len));
 770                 i40e_vf_parse_hw_config(&adapter->hw, adapter->vf_res);
 771                 /* restore current mac address */
 772                 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
 773                 i40evf_process_config(adapter);
 774                 }
 775                 break;
 776         case I40E_VIRTCHNL_OP_ENABLE_QUEUES:
 777                 /* enable transmits */
 778                 i40evf_irq_enable(adapter, true);
 779                 netif_tx_start_all_queues(adapter->netdev);
 780                 netif_carrier_on(adapter->netdev);
 781                 break;
 782         case I40E_VIRTCHNL_OP_DISABLE_QUEUES:
 783                 i40evf_free_all_tx_resources(adapter);
 784                 i40evf_free_all_rx_resources(adapter);
 785                 break;
 786         case I40E_VIRTCHNL_OP_VERSION:
 787         case I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP:
 788                 /* Don't display an error if we get these out of sequence.
 789                  * If the firmware needed to get kicked, we'll get these and
 790                  * it's no problem.
 791                  */
 792                 if (v_opcode != adapter->current_op)
 793                         return;
 794                 break;
 795         default:
 796                 if (v_opcode != adapter->current_op)
 797                         dev_warn(&adapter->pdev->dev, "Expected response %d from PF, received %d\n",
 798                                  adapter->current_op, v_opcode);
 799                 break;
 800         } /* switch v_opcode */
 801         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
 802 }