drivers/net/ethernet/intel/i40e/i40e_client.c

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Driver
   4  * Copyright(c) 2013 - 2015 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 <linux/list.h>
  28 #include <linux/errno.h>
  29
  30 #include "i40e.h"
  31 #include "i40e_prototype.h"
  32 #include "i40e_client.h"
  33
  34 static const char i40e_client_interface_version_str[] = I40E_CLIENT_VERSION_STR;
  35
  36 static LIST_HEAD(i40e_devices);
  37 static DEFINE_MUTEX(i40e_device_mutex);
  38
  39 static LIST_HEAD(i40e_clients);
  40 static DEFINE_MUTEX(i40e_client_mutex);
  41
  42 static LIST_HEAD(i40e_client_instances);
  43 static DEFINE_MUTEX(i40e_client_instance_mutex);
  44
  45 static int i40e_client_virtchnl_send(struct i40e_info *ldev,
  46                                      struct i40e_client *client,
  47                                      u32 vf_id, u8 *msg, u16 len);
  48
  49 static int i40e_client_setup_qvlist(struct i40e_info *ldev,
  50                                     struct i40e_client *client,
  51                                     struct i40e_qvlist_info *qvlist_info);
  52
  53 static void i40e_client_request_reset(struct i40e_info *ldev,
  54                                       struct i40e_client *client,
  55                                       u32 reset_level);
  56
  57 static int i40e_client_update_vsi_ctxt(struct i40e_info *ldev,
  58                                        struct i40e_client *client,
  59                                        bool is_vf, u32 vf_id,
  60                                        u32 flag, u32 valid_flag);
  61
  62 static struct i40e_ops i40e_lan_ops = {
  63         .virtchnl_send = i40e_client_virtchnl_send,
  64         .setup_qvlist = i40e_client_setup_qvlist,
  65         .request_reset = i40e_client_request_reset,
  66         .update_vsi_ctxt = i40e_client_update_vsi_ctxt,
  67 };
  68
  69 /**
  70  * i40e_client_type_to_vsi_type - convert client type to vsi type
  71  * @client_type: the i40e_client type
  72  *
  73  * returns the related vsi type value
  74  **/
  75 static
  76 enum i40e_vsi_type i40e_client_type_to_vsi_type(enum i40e_client_type type)
  77 {
  78         switch (type) {
  79         case I40E_CLIENT_IWARP:
  80                 return I40E_VSI_IWARP;
  81
  82         case I40E_CLIENT_VMDQ2:
  83                 return I40E_VSI_VMDQ2;
  84
  85         default:
  86                 pr_err("i40e: Client type unknown\n");
  87                 return I40E_VSI_TYPE_UNKNOWN;
  88         }
  89 }
  90
  91 /**
  92  * i40e_client_get_params - Get the params that can change at runtime
  93  * @vsi: the VSI with the message
  94  * @param: clinet param struct
  95  *
  96  **/
  97 static
  98 int i40e_client_get_params(struct i40e_vsi *vsi, struct i40e_params *params)
  99 {
 100         struct i40e_dcbx_config *dcb_cfg = &vsi->back->hw.local_dcbx_config;
 101         int i = 0;
 102
 103         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
 104                 u8 tc = dcb_cfg->etscfg.prioritytable[i];
 105                 u16 qs_handle;
 106
 107                 /* If TC is not enabled for VSI use TC0 for UP */
 108                 if (!(vsi->tc_config.enabled_tc & BIT(tc)))
 109                         tc = 0;
 110
 111                 qs_handle = le16_to_cpu(vsi->info.qs_handle[tc]);
 112                 params->qos.prio_qos[i].tc = tc;
 113                 params->qos.prio_qos[i].qs_handle = qs_handle;
 114                 if (qs_handle == I40E_AQ_VSI_QS_HANDLE_INVALID) {
 115                         dev_err(&vsi->back->pdev->dev, "Invalid queue set handle for TC = %d, vsi id = %d\n",
 116                                 tc, vsi->id);
 117                         return -EINVAL;
 118                 }
 119         }
 120
 121         params->mtu = vsi->netdev->mtu;
 122         return 0;
 123 }
 124
 125 /**
 126  * i40e_notify_client_of_vf_msg - call the client vf message callback
 127  * @vsi: the VSI with the message
 128  * @vf_id: the absolute VF id that sent the message
 129  * @msg: message buffer
 130  * @len: length of the message
 131  *
 132  * If there is a client to this VSI, call the client
 133  **/
 134 void
 135 i40e_notify_client_of_vf_msg(struct i40e_vsi *vsi, u32 vf_id, u8 *msg, u16 len)
 136 {
 137         struct i40e_client_instance *cdev;
 138
 139         if (!vsi)
 140                 return;
 141         mutex_lock(&i40e_client_instance_mutex);
 142         list_for_each_entry(cdev, &i40e_client_instances, list) {
 143                 if (cdev->lan_info.pf == vsi->back) {
 144                         if (!cdev->client ||
 145                             !cdev->client->ops ||
 146                             !cdev->client->ops->virtchnl_receive) {
 147                                 dev_dbg(&vsi->back->pdev->dev,
 148                                         "Cannot locate client instance virtual channel receive routine\n");
 149                                 continue;
 150                         }
 151                         cdev->client->ops->virtchnl_receive(&cdev->lan_info,
 152                                                             cdev->client,
 153                                                             vf_id, msg, len);
 154                 }
 155         }
 156         mutex_unlock(&i40e_client_instance_mutex);
 157 }
 158
 159 /**
 160  * i40e_notify_client_of_l2_param_changes - call the client notify callback
 161  * @vsi: the VSI with l2 param changes
 162  *
 163  * If there is a client to this VSI, call the client
 164  **/
 165 void i40e_notify_client_of_l2_param_changes(struct i40e_vsi *vsi)
 166 {
 167         struct i40e_client_instance *cdev;
 168         struct i40e_params params;
 169
 170         if (!vsi)
 171                 return;
 172         memset(&params, 0, sizeof(params));
 173         i40e_client_get_params(vsi, &params);
 174         mutex_lock(&i40e_client_instance_mutex);
 175         list_for_each_entry(cdev, &i40e_client_instances, list) {
 176                 if (cdev->lan_info.pf == vsi->back) {
 177                         if (!cdev->client ||
 178                             !cdev->client->ops ||
 179                             !cdev->client->ops->l2_param_change) {
 180                                 dev_dbg(&vsi->back->pdev->dev,
 181                                         "Cannot locate client instance l2_param_change routine\n");
 182                                 continue;
 183                         }
 184                         cdev->lan_info.params = params;
 185                         cdev->client->ops->l2_param_change(&cdev->lan_info,
 186                                                            cdev->client,
 187                                                            &params);
 188                 }
 189         }
 190         mutex_unlock(&i40e_client_instance_mutex);
 191 }
 192
 193 /**
 194  * i40e_notify_client_of_netdev_open - call the client open callback
 195  * @vsi: the VSI with netdev opened
 196  *
 197  * If there is a client to this netdev, call the client with open
 198  **/
 199 void i40e_notify_client_of_netdev_open(struct i40e_vsi *vsi)
 200 {
 201         struct i40e_client_instance *cdev;
 202         int ret = 0;
 203
 204         if (!vsi)
 205                 return;
 206         mutex_lock(&i40e_client_instance_mutex);
 207         list_for_each_entry(cdev, &i40e_client_instances, list) {
 208                 if (cdev->lan_info.netdev == vsi->netdev) {
 209                         if (!cdev->client ||
 210                             !cdev->client->ops || !cdev->client->ops->open) {
 211                                 dev_dbg(&vsi->back->pdev->dev,
 212                                         "Cannot locate client instance open routine\n");
 213                                 continue;
 214                         }
 215                         if (!(test_bit(__I40E_CLIENT_INSTANCE_OPENED,
 216                                        &cdev->state))) {
 217                                 ret = cdev->client->ops->open(&cdev->lan_info,
 218                                                               cdev->client);
 219                                 if (!ret)
 220                                         set_bit(__I40E_CLIENT_INSTANCE_OPENED,
 221                                                 &cdev->state);
 222                         }
 223                 }
 224         }
 225         mutex_unlock(&i40e_client_instance_mutex);
 226 }
 227
 228 /**
 229  * i40e_client_release_qvlist
 230  * @ldev: pointer to L2 context.
 231  *
 232  **/
 233 static void i40e_client_release_qvlist(struct i40e_info *ldev)
 234 {
 235         struct i40e_qvlist_info *qvlist_info = ldev->qvlist_info;
 236         u32 i;
 237
 238         if (!ldev->qvlist_info)
 239                 return;
 240
 241         for (i = 0; i < qvlist_info->num_vectors; i++) {
 242                 struct i40e_pf *pf = ldev->pf;
 243                 struct i40e_qv_info *qv_info;
 244                 u32 reg_idx;
 245
 246                 qv_info = &qvlist_info->qv_info[i];
 247                 if (!qv_info)
 248                         continue;
 249                 reg_idx = I40E_PFINT_LNKLSTN(qv_info->v_idx - 1);
 250                 wr32(&pf->hw, reg_idx, I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK);
 251         }
 252         kfree(ldev->qvlist_info);
 253         ldev->qvlist_info = NULL;
 254 }
 255
 256 /**
 257  * i40e_notify_client_of_netdev_close - call the client close callback
 258  * @vsi: the VSI with netdev closed
 259  * @reset: true when close called due to a reset pending
 260  *
 261  * If there is a client to this netdev, call the client with close
 262  **/
 263 void i40e_notify_client_of_netdev_close(struct i40e_vsi *vsi, bool reset)
 264 {
 265         struct i40e_client_instance *cdev;
 266
 267         if (!vsi)
 268                 return;
 269         mutex_lock(&i40e_client_instance_mutex);
 270         list_for_each_entry(cdev, &i40e_client_instances, list) {
 271                 if (cdev->lan_info.netdev == vsi->netdev) {
 272                         if (!cdev->client ||
 273                             !cdev->client->ops || !cdev->client->ops->close) {
 274                                 dev_dbg(&vsi->back->pdev->dev,
 275                                         "Cannot locate client instance close routine\n");
 276                                 continue;
 277                         }
 278                         cdev->client->ops->close(&cdev->lan_info, cdev->client,
 279                                                  reset);
 280                         i40e_client_release_qvlist(&cdev->lan_info);
 281                 }
 282         }
 283         mutex_unlock(&i40e_client_instance_mutex);
 284 }
 285
 286 /**
 287  * i40e_notify_client_of_vf_reset - call the client vf reset callback
 288  * @pf: PF device pointer
 289  * @vf_id: asolute id of VF being reset
 290  *
 291  * If there is a client attached to this PF, notify when a VF is reset
 292  **/
 293 void i40e_notify_client_of_vf_reset(struct i40e_pf *pf, u32 vf_id)
 294 {
 295         struct i40e_client_instance *cdev;
 296
 297         if (!pf)
 298                 return;
 299         mutex_lock(&i40e_client_instance_mutex);
 300         list_for_each_entry(cdev, &i40e_client_instances, list) {
 301                 if (cdev->lan_info.pf == pf) {
 302                         if (!cdev->client ||
 303                             !cdev->client->ops ||
 304                             !cdev->client->ops->vf_reset) {
 305                                 dev_dbg(&pf->pdev->dev,
 306                                         "Cannot locate client instance VF reset routine\n");
 307                                 continue;
 308                         }
 309                         cdev->client->ops->vf_reset(&cdev->lan_info,
 310                                                     cdev->client, vf_id);
 311                 }
 312         }
 313         mutex_unlock(&i40e_client_instance_mutex);
 314 }
 315
 316 /**
 317  * i40e_notify_client_of_vf_enable - call the client vf notification callback
 318  * @pf: PF device pointer
 319  * @num_vfs: the number of VFs currently enabled, 0 for disable
 320  *
 321  * If there is a client attached to this PF, call its VF notification routine
 322  **/
 323 void i40e_notify_client_of_vf_enable(struct i40e_pf *pf, u32 num_vfs)
 324 {
 325         struct i40e_client_instance *cdev;
 326
 327         if (!pf)
 328                 return;
 329         mutex_lock(&i40e_client_instance_mutex);
 330         list_for_each_entry(cdev, &i40e_client_instances, list) {
 331                 if (cdev->lan_info.pf == pf) {
 332                         if (!cdev->client ||
 333                             !cdev->client->ops ||
 334                             !cdev->client->ops->vf_enable) {
 335                                 dev_dbg(&pf->pdev->dev,
 336                                         "Cannot locate client instance VF enable routine\n");
 337                                 continue;
 338                         }
 339                         cdev->client->ops->vf_enable(&cdev->lan_info,
 340                                                      cdev->client, num_vfs);
 341                 }
 342         }
 343         mutex_unlock(&i40e_client_instance_mutex);
 344 }
 345
 346 /**
 347  * i40e_vf_client_capable - ask the client if it likes the specified VF
 348  * @pf: PF device pointer
 349  * @vf_id: the VF in question
 350  *
 351  * If there is a client of the specified type attached to this PF, call
 352  * its vf_capable routine
 353  **/
 354 int i40e_vf_client_capable(struct i40e_pf *pf, u32 vf_id,
 355                            enum i40e_client_type type)
 356 {
 357         struct i40e_client_instance *cdev;
 358         int capable = false;
 359
 360         if (!pf)
 361                 return false;
 362         mutex_lock(&i40e_client_instance_mutex);
 363         list_for_each_entry(cdev, &i40e_client_instances, list) {
 364                 if (cdev->lan_info.pf == pf) {
 365                         if (!cdev->client ||
 366                             !cdev->client->ops ||
 367                             !cdev->client->ops->vf_capable ||
 368                             !(cdev->client->type == type)) {
 369                                 dev_dbg(&pf->pdev->dev,
 370                                         "Cannot locate client instance VF capability routine\n");
 371                                 continue;
 372                         }
 373                         capable = cdev->client->ops->vf_capable(&cdev->lan_info,
 374                                                                 cdev->client,
 375                                                                 vf_id);
 376                         break;
 377                 }
 378         }
 379         mutex_unlock(&i40e_client_instance_mutex);
 380         return capable;
 381 }
 382
 383 /**
 384  * i40e_vsi_lookup - finds a matching VSI from the PF list starting at start_vsi
 385  * @pf: board private structure
 386  * @type: vsi type
 387  * @start_vsi: a VSI pointer from where to start the search
 388  *
 389  * Returns non NULL on success or NULL for failure
 390  **/
 391 struct i40e_vsi *i40e_vsi_lookup(struct i40e_pf *pf,
 392                                  enum i40e_vsi_type type,
 393                                  struct i40e_vsi *start_vsi)
 394 {
 395         struct i40e_vsi *vsi;
 396         int i = 0;
 397
 398         if (start_vsi) {
 399                 for (i = 0; i < pf->num_alloc_vsi; i++) {
 400                         vsi = pf->vsi[i];
 401                         if (vsi == start_vsi)
 402                                 break;
 403                 }
 404         }
 405         for (; i < pf->num_alloc_vsi; i++) {
 406                 vsi = pf->vsi[i];
 407                 if (vsi && vsi->type == type)
 408                         return vsi;
 409         }
 410
 411         return NULL;
 412 }
 413
 414 /**
 415  * i40e_client_add_instance - add a client instance struct to the instance list
 416  * @pf: pointer to the board struct
 417  * @client: pointer to a client struct in the client list.
 418  * @existing: if there was already an existing instance
 419  *
 420  * Returns cdev ptr on success or if already exists, NULL on failure
 421  **/
 422 static
 423 struct i40e_client_instance *i40e_client_add_instance(struct i40e_pf *pf,
 424                                                      struct i40e_client *client,
 425                                                      bool *existing)
 426 {
 427         struct i40e_client_instance *cdev;
 428         struct netdev_hw_addr *mac = NULL;
 429         struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
 430
 431         mutex_lock(&i40e_client_instance_mutex);
 432         list_for_each_entry(cdev, &i40e_client_instances, list) {
 433                 if ((cdev->lan_info.pf == pf) && (cdev->client == client)) {
 434                         *existing = true;
 435                         goto out;
 436                 }
 437         }
 438         cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
 439         if (!cdev)
 440                 goto out;
 441
 442         cdev->lan_info.pf = (void *)pf;
 443         cdev->lan_info.netdev = vsi->netdev;
 444         cdev->lan_info.pcidev = pf->pdev;
 445         cdev->lan_info.fid = pf->hw.pf_id;
 446         cdev->lan_info.ftype = I40E_CLIENT_FTYPE_PF;
 447         cdev->lan_info.hw_addr = pf->hw.hw_addr;
 448         cdev->lan_info.ops = &i40e_lan_ops;
 449         cdev->lan_info.version.major = I40E_CLIENT_VERSION_MAJOR;
 450         cdev->lan_info.version.minor = I40E_CLIENT_VERSION_MINOR;
 451         cdev->lan_info.version.build = I40E_CLIENT_VERSION_BUILD;
 452         cdev->lan_info.fw_maj_ver = pf->hw.aq.fw_maj_ver;
 453         cdev->lan_info.fw_min_ver = pf->hw.aq.fw_min_ver;
 454         cdev->lan_info.fw_build = pf->hw.aq.fw_build;
 455         set_bit(__I40E_CLIENT_INSTANCE_NONE, &cdev->state);
 456
 457         if (i40e_client_get_params(vsi, &cdev->lan_info.params)) {
 458                 kfree(cdev);
 459                 cdev = NULL;
 460                 goto out;
 461         }
 462
 463         cdev->lan_info.msix_count = pf->num_iwarp_msix;
 464         cdev->lan_info.msix_entries = &pf->msix_entries[pf->iwarp_base_vector];
 465
 466         mac = list_first_entry(&cdev->lan_info.netdev->dev_addrs.list,
 467                                struct netdev_hw_addr, list);
 468         if (mac)
 469                 ether_addr_copy(cdev->lan_info.lanmac, mac->addr);
 470         else
 471                 dev_err(&pf->pdev->dev, "MAC address list is empty!\n");
 472
 473         cdev->client = client;
 474         INIT_LIST_HEAD(&cdev->list);
 475         list_add(&cdev->list, &i40e_client_instances);
 476 out:
 477         mutex_unlock(&i40e_client_instance_mutex);
 478         return cdev;
 479 }
 480
 481 /**
 482  * i40e_client_del_instance - removes a client instance from the list
 483  * @pf: pointer to the board struct
 484  *
 485  * Returns 0 on success or non-0 on error
 486  **/
 487 static
 488 int i40e_client_del_instance(struct i40e_pf *pf, struct i40e_client *client)
 489 {
 490         struct i40e_client_instance *cdev, *tmp;
 491         int ret = -ENODEV;
 492
 493         mutex_lock(&i40e_client_instance_mutex);
 494         list_for_each_entry_safe(cdev, tmp, &i40e_client_instances, list) {
 495                 if ((cdev->lan_info.pf != pf) || (cdev->client != client))
 496                         continue;
 497
 498                 dev_info(&pf->pdev->dev, "Deleted instance of Client %s, of dev %d bus=0x%02x func=0x%02x)\n",
 499                          client->name, pf->hw.pf_id,
 500                          pf->hw.bus.device, pf->hw.bus.func);
 501                 list_del(&cdev->list);
 502                 kfree(cdev);
 503                 ret = 0;
 504                 break;
 505         }
 506         mutex_unlock(&i40e_client_instance_mutex);
 507         return ret;
 508 }
 509
 510 /**
 511  * i40e_client_subtask - client maintenance work
 512  * @pf: board private structure
 513  **/
 514 void i40e_client_subtask(struct i40e_pf *pf)
 515 {
 516         struct i40e_client_instance *cdev;
 517         struct i40e_client *client;
 518         bool existing = false;
 519         int ret = 0;
 520
 521         if (!(pf->flags & I40E_FLAG_SERVICE_CLIENT_REQUESTED))
 522                 return;
 523         pf->flags &= ~I40E_FLAG_SERVICE_CLIENT_REQUESTED;
 524
 525         /* If we're down or resetting, just bail */
 526         if (test_bit(__I40E_DOWN, &pf->state) ||
 527             test_bit(__I40E_CONFIG_BUSY, &pf->state))
 528                 return;
 529
 530         /* Check client state and instantiate client if client registered */
 531         mutex_lock(&i40e_client_mutex);
 532         list_for_each_entry(client, &i40e_clients, list) {
 533                 /* first check client is registered */
 534                 if (!test_bit(__I40E_CLIENT_REGISTERED, &client->state))
 535                         continue;
 536
 537                 /* Do we also need the LAN VSI to be up, to create instance */
 538                 if (!(client->flags & I40E_CLIENT_FLAGS_LAUNCH_ON_PROBE)) {
 539                         /* check if L2 VSI is up, if not we are not ready */
 540                         if (test_bit(__I40E_DOWN, &pf->vsi[pf->lan_vsi]->state))
 541                                 continue;
 542                 } else {
 543                         dev_warn(&pf->pdev->dev, "This client %s is being instanciated at probe\n",
 544                                  client->name);
 545                 }
 546
 547                 /* Add the client instance to the instance list */
 548                 cdev = i40e_client_add_instance(pf, client, &existing);
 549                 if (!cdev)
 550                         continue;
 551
 552                 if (!existing) {
 553                         /* Also up the ref_cnt for no. of instances of this
 554                          * client.
 555                          */
 556                         atomic_inc(&client->ref_cnt);
 557                         dev_info(&pf->pdev->dev, "Added instance of Client %s to PF%d bus=0x%02x func=0x%02x\n",
 558                                  client->name, pf->hw.pf_id,
 559                                  pf->hw.bus.device, pf->hw.bus.func);
 560                 }
 561
 562                 /* Send an Open request to the client */
 563                 atomic_inc(&cdev->ref_cnt);
 564                 if (client->ops && client->ops->open)
 565                         ret = client->ops->open(&cdev->lan_info, client);
 566                 atomic_dec(&cdev->ref_cnt);
 567                 if (!ret) {
 568                         set_bit(__I40E_CLIENT_INSTANCE_OPENED, &cdev->state);
 569                 } else {
 570                         /* remove client instance */
 571                         i40e_client_del_instance(pf, client);
 572                         atomic_dec(&client->ref_cnt);
 573                         continue;
 574                 }
 575         }
 576         mutex_unlock(&i40e_client_mutex);
 577 }
 578
 579 /**
 580  * i40e_lan_add_device - add a lan device struct to the list of lan devices
 581  * @pf: pointer to the board struct
 582  *
 583  * Returns 0 on success or none 0 on error
 584  **/
 585 int i40e_lan_add_device(struct i40e_pf *pf)
 586 {
 587         struct i40e_device *ldev;
 588         int ret = 0;
 589
 590         mutex_lock(&i40e_device_mutex);
 591         list_for_each_entry(ldev, &i40e_devices, list) {
 592                 if (ldev->pf == pf) {
 593                         ret = -EEXIST;
 594                         goto out;
 595                 }
 596         }
 597         ldev = kzalloc(sizeof(*ldev), GFP_KERNEL);
 598         if (!ldev) {
 599                 ret = -ENOMEM;
 600                 goto out;
 601         }
 602         ldev->pf = pf;
 603         INIT_LIST_HEAD(&ldev->list);
 604         list_add(&ldev->list, &i40e_devices);
 605         dev_info(&pf->pdev->dev, "Added LAN device PF%d bus=0x%02x func=0x%02x\n",
 606                  pf->hw.pf_id, pf->hw.bus.device, pf->hw.bus.func);
 607
 608         /* Since in some cases register may have happened before a device gets
 609          * added, we can schedule a subtask to go initiate the clients if
 610          * they can be launched at probe time.
 611          */
 612         pf->flags |= I40E_FLAG_SERVICE_CLIENT_REQUESTED;
 613         i40e_service_event_schedule(pf);
 614
 615 out:
 616         mutex_unlock(&i40e_device_mutex);
 617         return ret;
 618 }
 619
 620 /**
 621  * i40e_lan_del_device - removes a lan device from the device list
 622  * @pf: pointer to the board struct
 623  *
 624  * Returns 0 on success or non-0 on error
 625  **/
 626 int i40e_lan_del_device(struct i40e_pf *pf)
 627 {
 628         struct i40e_device *ldev, *tmp;
 629         int ret = -ENODEV;
 630
 631         mutex_lock(&i40e_device_mutex);
 632         list_for_each_entry_safe(ldev, tmp, &i40e_devices, list) {
 633                 if (ldev->pf == pf) {
 634                         dev_info(&pf->pdev->dev, "Deleted LAN device PF%d bus=0x%02x func=0x%02x\n",
 635                                  pf->hw.pf_id, pf->hw.bus.device,
 636                                  pf->hw.bus.func);
 637                         list_del(&ldev->list);
 638                         kfree(ldev);
 639                         ret = 0;
 640                         break;
 641                 }
 642         }
 643
 644         mutex_unlock(&i40e_device_mutex);
 645         return ret;
 646 }
 647
 648 /**
 649  * i40e_client_release - release client specific resources
 650  * @client: pointer to the registered client
 651  *
 652  * Return 0 on success or < 0 on error
 653  **/
 654 static int i40e_client_release(struct i40e_client *client)
 655 {
 656         struct i40e_client_instance *cdev, *tmp;
 657         struct i40e_pf *pf = NULL;
 658         int ret = 0;
 659
 660         LIST_HEAD(cdevs_tmp);
 661
 662         mutex_lock(&i40e_client_instance_mutex);
 663         list_for_each_entry_safe(cdev, tmp, &i40e_client_instances, list) {
 664                 if (strncmp(cdev->client->name, client->name,
 665                             I40E_CLIENT_STR_LENGTH))
 666                         continue;
 667                 if (test_bit(__I40E_CLIENT_INSTANCE_OPENED, &cdev->state)) {
 668                         if (atomic_read(&cdev->ref_cnt) > 0) {
 669                                 ret = I40E_ERR_NOT_READY;
 670                                 goto out;
 671                         }
 672                         pf = (struct i40e_pf *)cdev->lan_info.pf;
 673                         if (client->ops && client->ops->close)
 674                                 client->ops->close(&cdev->lan_info, client,
 675                                                    false);
 676                         i40e_client_release_qvlist(&cdev->lan_info);
 677                         clear_bit(__I40E_CLIENT_INSTANCE_OPENED, &cdev->state);
 678
 679                         dev_warn(&pf->pdev->dev,
 680                                  "Client %s instance for PF id %d closed\n",
 681                                  client->name, pf->hw.pf_id);
 682                 }
 683                 /* delete the client instance from the list */
 684                 list_del(&cdev->list);
 685                 list_add(&cdev->list, &cdevs_tmp);
 686                 atomic_dec(&client->ref_cnt);
 687                 dev_info(&pf->pdev->dev, "Deleted client instance of Client %s\n",
 688                          client->name);
 689         }
 690 out:
 691         mutex_unlock(&i40e_client_instance_mutex);
 692
 693         /* free the client device and release its vsi */
 694         list_for_each_entry_safe(cdev, tmp, &cdevs_tmp, list) {
 695                 kfree(cdev);
 696         }
 697         return ret;
 698 }
 699
 700 /**
 701  * i40e_client_prepare - prepare client specific resources
 702  * @client: pointer to the registered client
 703  *
 704  * Return 0 on success or < 0 on error
 705  **/
 706 static int i40e_client_prepare(struct i40e_client *client)
 707 {
 708         struct i40e_device *ldev;
 709         struct i40e_pf *pf;
 710         int ret = 0;
 711
 712         mutex_lock(&i40e_device_mutex);
 713         list_for_each_entry(ldev, &i40e_devices, list) {
 714                 pf = ldev->pf;
 715                 /* Start the client subtask */
 716                 pf->flags |= I40E_FLAG_SERVICE_CLIENT_REQUESTED;
 717                 i40e_service_event_schedule(pf);
 718         }
 719         mutex_unlock(&i40e_device_mutex);
 720         return ret;
 721 }
 722
 723 /**
 724  * i40e_client_virtchnl_send - TBD
 725  * @ldev: pointer to L2 context
 726  * @client: Client pointer
 727  * @vf_id: absolute VF identifier
 728  * @msg: message buffer
 729  * @len: length of message buffer
 730  *
 731  * Return 0 on success or < 0 on error
 732  **/
 733 static int i40e_client_virtchnl_send(struct i40e_info *ldev,
 734                                      struct i40e_client *client,
 735                                      u32 vf_id, u8 *msg, u16 len)
 736 {
 737         struct i40e_pf *pf = ldev->pf;
 738         struct i40e_hw *hw = &pf->hw;
 739         i40e_status err;
 740
 741         err = i40e_aq_send_msg_to_vf(hw, vf_id, I40E_VIRTCHNL_OP_IWARP,
 742                                      0, msg, len, NULL);
 743         if (err)
 744                 dev_err(&pf->pdev->dev, "Unable to send iWarp message to VF, error %d, aq status %d\n",
 745                         err, hw->aq.asq_last_status);
 746
 747         return err;
 748 }
 749
 750 /**
 751  * i40e_client_setup_qvlist
 752  * @ldev: pointer to L2 context.
 753  * @client: Client pointer.
 754  * @qv_info: queue and vector list
 755  *
 756  * Return 0 on success or < 0 on error
 757  **/
 758 static int i40e_client_setup_qvlist(struct i40e_info *ldev,
 759                                     struct i40e_client *client,
 760                                     struct i40e_qvlist_info *qvlist_info)
 761 {
 762         struct i40e_pf *pf = ldev->pf;
 763         struct i40e_hw *hw = &pf->hw;
 764         struct i40e_qv_info *qv_info;
 765         u32 v_idx, i, reg_idx, reg;
 766         u32 size;
 767
 768         size = sizeof(struct i40e_qvlist_info) +
 769                (sizeof(struct i40e_qv_info) * (qvlist_info->num_vectors - 1));
 770         ldev->qvlist_info = kzalloc(size, GFP_KERNEL);
 771         ldev->qvlist_info->num_vectors = qvlist_info->num_vectors;
 772
 773         for (i = 0; i < qvlist_info->num_vectors; i++) {
 774                 qv_info = &qvlist_info->qv_info[i];
 775                 if (!qv_info)
 776                         continue;
 777                 v_idx = qv_info->v_idx;
 778
 779                 /* Validate vector id belongs to this client */
 780                 if ((v_idx >= (pf->iwarp_base_vector + pf->num_iwarp_msix)) ||
 781                     (v_idx < pf->iwarp_base_vector))
 782                         goto err;
 783
 784                 ldev->qvlist_info->qv_info[i] = *qv_info;
 785                 reg_idx = I40E_PFINT_LNKLSTN(v_idx - 1);
 786
 787                 if (qv_info->ceq_idx == I40E_QUEUE_INVALID_IDX) {
 788                         /* Special case - No CEQ mapped on this vector */
 789                         wr32(hw, reg_idx, I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK);
 790                 } else {
 791                         reg = (qv_info->ceq_idx &
 792                                I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK) |
 793                                (I40E_QUEUE_TYPE_PE_CEQ <<
 794                                I40E_PFINT_LNKLSTN_FIRSTQ_TYPE_SHIFT);
 795                         wr32(hw, reg_idx, reg);
 796
 797                         reg = (I40E_PFINT_CEQCTL_CAUSE_ENA_MASK |
 798                                (v_idx << I40E_PFINT_CEQCTL_MSIX_INDX_SHIFT) |
 799                                (qv_info->itr_idx <<
 800                                 I40E_PFINT_CEQCTL_ITR_INDX_SHIFT) |
 801                                (I40E_QUEUE_END_OF_LIST <<
 802                                 I40E_PFINT_CEQCTL_NEXTQ_INDX_SHIFT));
 803                         wr32(hw, I40E_PFINT_CEQCTL(qv_info->ceq_idx), reg);
 804                 }
 805                 if (qv_info->aeq_idx != I40E_QUEUE_INVALID_IDX) {
 806                         reg = (I40E_PFINT_AEQCTL_CAUSE_ENA_MASK |
 807                                (v_idx << I40E_PFINT_AEQCTL_MSIX_INDX_SHIFT) |
 808                                (qv_info->itr_idx <<
 809                                 I40E_PFINT_AEQCTL_ITR_INDX_SHIFT));
 810
 811                         wr32(hw, I40E_PFINT_AEQCTL, reg);
 812                 }
 813         }
 814
 815         return 0;
 816 err:
 817         kfree(ldev->qvlist_info);
 818         ldev->qvlist_info = NULL;
 819         return -EINVAL;
 820 }
 821
 822 /**
 823  * i40e_client_request_reset
 824  * @ldev: pointer to L2 context.
 825  * @client: Client pointer.
 826  * @level: reset level
 827  **/
 828 static void i40e_client_request_reset(struct i40e_info *ldev,
 829                                       struct i40e_client *client,
 830                                       u32 reset_level)
 831 {
 832         struct i40e_pf *pf = ldev->pf;
 833
 834         switch (reset_level) {
 835         case I40E_CLIENT_RESET_LEVEL_PF:
 836                 set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
 837                 break;
 838         case I40E_CLIENT_RESET_LEVEL_CORE:
 839                 set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
 840                 break;
 841         default:
 842                 dev_warn(&pf->pdev->dev,
 843                          "Client %s instance for PF id %d request an unsupported reset: %d.\n",
 844                          client->name, pf->hw.pf_id, reset_level);
 845                 break;
 846         }
 847
 848         i40e_service_event_schedule(pf);
 849 }
 850
 851 /**
 852  * i40e_client_update_vsi_ctxt
 853  * @ldev: pointer to L2 context.
 854  * @client: Client pointer.
 855  * @is_vf: if this for the VF
 856  * @vf_id: if is_vf true this carries the vf_id
 857  * @flag: Any device level setting that needs to be done for PE
 858  * @valid_flag: Bits in this match up and enable changing of flag bits
 859  *
 860  * Return 0 on success or < 0 on error
 861  **/
 862 static int i40e_client_update_vsi_ctxt(struct i40e_info *ldev,
 863                                        struct i40e_client *client,
 864                                        bool is_vf, u32 vf_id,
 865                                        u32 flag, u32 valid_flag)
 866 {
 867         struct i40e_pf *pf = ldev->pf;
 868         struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
 869         struct i40e_vsi_context ctxt;
 870         bool update = true;
 871         i40e_status err;
 872
 873         /* TODO: for now do not allow setting VF's VSI setting */
 874         if (is_vf)
 875                 return -EINVAL;
 876
 877         ctxt.seid = pf->main_vsi_seid;
 878         ctxt.pf_num = pf->hw.pf_id;
 879         err = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
 880         ctxt.flags = I40E_AQ_VSI_TYPE_PF;
 881         if (err) {
 882                 dev_info(&pf->pdev->dev,
 883                          "couldn't get PF vsi config, err %s aq_err %s\n",
 884                          i40e_stat_str(&pf->hw, err),
 885                          i40e_aq_str(&pf->hw,
 886                                      pf->hw.aq.asq_last_status));
 887                 return -ENOENT;
 888         }
 889
 890         if ((valid_flag & I40E_CLIENT_VSI_FLAG_TCP_PACKET_ENABLE) &&
 891             (flag & I40E_CLIENT_VSI_FLAG_TCP_PACKET_ENABLE)) {
 892                 ctxt.info.valid_sections =
 893                         cpu_to_le16(I40E_AQ_VSI_PROP_QUEUE_OPT_VALID);
 894                 ctxt.info.queueing_opt_flags |= I40E_AQ_VSI_QUE_OPT_TCP_ENA;
 895         } else if ((valid_flag & I40E_CLIENT_VSI_FLAG_TCP_PACKET_ENABLE) &&
 896                   !(flag & I40E_CLIENT_VSI_FLAG_TCP_PACKET_ENABLE)) {
 897                 ctxt.info.valid_sections =
 898                         cpu_to_le16(I40E_AQ_VSI_PROP_QUEUE_OPT_VALID);
 899                 ctxt.info.queueing_opt_flags &= ~I40E_AQ_VSI_QUE_OPT_TCP_ENA;
 900         } else {
 901                 update = false;
 902                 dev_warn(&pf->pdev->dev,
 903                          "Client %s instance for PF id %d request an unsupported Config: %x.\n",
 904                          client->name, pf->hw.pf_id, flag);
 905         }
 906
 907         if (update) {
 908                 err = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
 909                 if (err) {
 910                         dev_info(&pf->pdev->dev,
 911                                  "update VSI ctxt for PE failed, err %s aq_err %s\n",
 912                                  i40e_stat_str(&pf->hw, err),
 913                                  i40e_aq_str(&pf->hw,
 914                                              pf->hw.aq.asq_last_status));
 915                 }
 916         }
 917         return err;
 918 }
 919
 920 /**
 921  * i40e_register_client - Register a i40e client driver with the L2 driver
 922  * @client: pointer to the i40e_client struct
 923  *
 924  * Returns 0 on success or non-0 on error
 925  **/
 926 int i40e_register_client(struct i40e_client *client)
 927 {
 928         int ret = 0;
 929         enum i40e_vsi_type vsi_type;
 930
 931         if (!client) {
 932                 ret = -EIO;
 933                 goto out;
 934         }
 935
 936         if (strlen(client->name) == 0) {
 937                 pr_info("i40e: Failed to register client with no name\n");
 938                 ret = -EIO;
 939                 goto out;
 940         }
 941
 942         mutex_lock(&i40e_client_mutex);
 943         if (i40e_client_is_registered(client)) {
 944                 pr_info("i40e: Client %s has already been registered!\n",
 945                         client->name);
 946                 mutex_unlock(&i40e_client_mutex);
 947                 ret = -EEXIST;
 948                 goto out;
 949         }
 950
 951         if ((client->version.major != I40E_CLIENT_VERSION_MAJOR) ||
 952             (client->version.minor != I40E_CLIENT_VERSION_MINOR)) {
 953                 pr_info("i40e: Failed to register client %s due to mismatched client interface version\n",
 954                         client->name);
 955                 pr_info("Client is using version: %02d.%02d.%02d while LAN driver supports %s\n",
 956                         client->version.major, client->version.minor,
 957                         client->version.build,
 958                         i40e_client_interface_version_str);
 959                 mutex_unlock(&i40e_client_mutex);
 960                 ret = -EIO;
 961                 goto out;
 962         }
 963
 964         vsi_type = i40e_client_type_to_vsi_type(client->type);
 965         if (vsi_type == I40E_VSI_TYPE_UNKNOWN) {
 966                 pr_info("i40e: Failed to register client %s due to unknown client type %d\n",
 967                         client->name, client->type);
 968                 mutex_unlock(&i40e_client_mutex);
 969                 ret = -EIO;
 970                 goto out;
 971         }
 972         list_add(&client->list, &i40e_clients);
 973         set_bit(__I40E_CLIENT_REGISTERED, &client->state);
 974         mutex_unlock(&i40e_client_mutex);
 975
 976         if (i40e_client_prepare(client)) {
 977                 ret = -EIO;
 978                 goto out;
 979         }
 980
 981         pr_info("i40e: Registered client %s with return code %d\n",
 982                 client->name, ret);
 983 out:
 984         return ret;
 985 }
 986 EXPORT_SYMBOL(i40e_register_client);
 987
 988 /**
 989  * i40e_unregister_client - Unregister a i40e client driver with the L2 driver
 990  * @client: pointer to the i40e_client struct
 991  *
 992  * Returns 0 on success or non-0 on error
 993  **/
 994 int i40e_unregister_client(struct i40e_client *client)
 995 {
 996         int ret = 0;
 997
 998         /* When a unregister request comes through we would have to send
 999          * a close for each of the client instances that were opened.
1000          * client_release function is called to handle this.
1001          */
1002         mutex_lock(&i40e_client_mutex);
1003         if (!client || i40e_client_release(client)) {
1004                 ret = -EIO;
1005                 goto out;
1006         }
1007
1008         /* TODO: check if device is in reset, or if that matters? */
1009         if (!i40e_client_is_registered(client)) {
1010                 pr_info("i40e: Client %s has not been registered\n",
1011                         client->name);
1012                 mutex_unlock(&i40e_client_mutex);
1013                 ret = -ENODEV;
1014                 goto out;
1015         }
1016         if (atomic_read(&client->ref_cnt) == 0) {
1017                 clear_bit(__I40E_CLIENT_REGISTERED, &client->state);
1018                 list_del(&client->list);
1019                 pr_info("i40e: Unregistered client %s with return code %d\n",
1020                         client->name, ret);
1021         } else {
1022                 ret = I40E_ERR_NOT_READY;
1023                 pr_err("i40e: Client %s failed unregister - client has open instances\n",
1024                        client->name);
1025         }
1026
1027 out:
1028         mutex_unlock(&i40e_client_mutex);
1029         return ret;
1030 }
1031 EXPORT_SYMBOL(i40e_unregister_client);