drivers/net/ethernet/netronome/nfp/nfp_net_main.c

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 /* Copyright (C) 2015-2018 Netronome Systems, Inc. */
   3
   4 /*
   5  * nfp_net_main.c
   6  * Netronome network device driver: Main entry point
   7  * Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
   8  *          Alejandro Lucero <alejandro.lucero@netronome.com>
   9  *          Jason McMullan <jason.mcmullan@netronome.com>
  10  *          Rolf Neugebauer <rolf.neugebauer@netronome.com>
  11  */
  12
  13 #include <linux/etherdevice.h>
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/lockdep.h>
  17 #include <linux/pci.h>
  18 #include <linux/pci_regs.h>
  19 #include <linux/msi.h>
  20 #include <linux/random.h>
  21 #include <linux/rtnetlink.h>
  22
  23 #include "nfpcore/nfp.h"
  24 #include "nfpcore/nfp_cpp.h"
  25 #include "nfpcore/nfp_dev.h"
  26 #include "nfpcore/nfp_nffw.h"
  27 #include "nfpcore/nfp_nsp.h"
  28 #include "nfpcore/nfp6000_pcie.h"
  29 #include "nfp_app.h"
  30 #include "nfp_net_ctrl.h"
  31 #include "nfp_net_sriov.h"
  32 #include "nfp_net.h"
  33 #include "nfp_main.h"
  34 #include "nfp_port.h"
  35
  36 #define NFP_PF_CSR_SLICE_SIZE   (32 * 1024)
  37
  38 /**
  39  * nfp_net_get_mac_addr() - Get the MAC address.
  40  * @pf:       NFP PF handle
  41  * @netdev:   net_device to set MAC address on
  42  * @port:     NFP port structure
  43  *
  44  * First try to get the MAC address from NSP ETH table. If that
  45  * fails generate a random address.
  46  */
  47 void
  48 nfp_net_get_mac_addr(struct nfp_pf *pf, struct net_device *netdev,
  49                      struct nfp_port *port)
  50 {
  51         struct nfp_eth_table_port *eth_port;
  52
  53         eth_port = __nfp_port_get_eth_port(port);
  54         if (!eth_port) {
  55                 eth_hw_addr_random(netdev);
  56                 return;
  57         }
  58
  59         eth_hw_addr_set(netdev, eth_port->mac_addr);
  60         ether_addr_copy(netdev->perm_addr, eth_port->mac_addr);
  61 }
  62
  63 static struct nfp_eth_table_port *
  64 nfp_net_find_port(struct nfp_eth_table *eth_tbl, unsigned int index)
  65 {
  66         int i;
  67
  68         for (i = 0; eth_tbl && i < eth_tbl->count; i++)
  69                 if (eth_tbl->ports[i].index == index)
  70                         return &eth_tbl->ports[i];
  71
  72         return NULL;
  73 }
  74
  75 static int nfp_net_pf_get_num_ports(struct nfp_pf *pf)
  76 {
  77         return nfp_pf_rtsym_read_optional(pf, "nfd_cfg_pf%u_num_ports", 1);
  78 }
  79
  80 static int nfp_net_pf_get_app_id(struct nfp_pf *pf)
  81 {
  82         return nfp_pf_rtsym_read_optional(pf, "_pf%u_net_app_id",
  83                                           NFP_APP_CORE_NIC);
  84 }
  85
  86 static void nfp_net_pf_free_vnic(struct nfp_pf *pf, struct nfp_net *nn)
  87 {
  88         if (nfp_net_is_data_vnic(nn))
  89                 nfp_app_vnic_free(pf->app, nn);
  90         nfp_port_free(nn->port);
  91         list_del(&nn->vnic_list);
  92         pf->num_vnics--;
  93         nfp_net_free(nn);
  94 }
  95
  96 static void nfp_net_pf_free_vnics(struct nfp_pf *pf)
  97 {
  98         struct nfp_net *nn, *next;
  99
 100         list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list)
 101                 if (nfp_net_is_data_vnic(nn))
 102                         nfp_net_pf_free_vnic(pf, nn);
 103 }
 104
 105 static struct nfp_net *
 106 nfp_net_pf_alloc_vnic(struct nfp_pf *pf, bool needs_netdev,
 107                       void __iomem *ctrl_bar, void __iomem *qc_bar,
 108                       int stride, unsigned int id)
 109 {
 110         u32 tx_base, rx_base, n_tx_rings, n_rx_rings;
 111         struct nfp_net *nn;
 112         int err;
 113
 114         tx_base = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
 115         rx_base = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
 116         n_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS);
 117         n_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS);
 118
 119         /* Allocate and initialise the vNIC */
 120         nn = nfp_net_alloc(pf->pdev, pf->dev_info, ctrl_bar, needs_netdev,
 121                            n_tx_rings, n_rx_rings);
 122         if (IS_ERR(nn))
 123                 return nn;
 124
 125         nn->app = pf->app;
 126         nn->tx_bar = qc_bar + tx_base * NFP_QCP_QUEUE_ADDR_SZ;
 127         nn->rx_bar = qc_bar + rx_base * NFP_QCP_QUEUE_ADDR_SZ;
 128         nn->dp.is_vf = 0;
 129         nn->stride_rx = stride;
 130         nn->stride_tx = stride;
 131
 132         if (needs_netdev) {
 133                 err = nfp_app_vnic_alloc(pf->app, nn, id);
 134                 if (err) {
 135                         nfp_net_free(nn);
 136                         return ERR_PTR(err);
 137                 }
 138         }
 139
 140         pf->num_vnics++;
 141         list_add_tail(&nn->vnic_list, &pf->vnics);
 142
 143         return nn;
 144 }
 145
 146 static int
 147 nfp_net_pf_init_vnic(struct nfp_pf *pf, struct nfp_net *nn, unsigned int id)
 148 {
 149         int err;
 150
 151         nn->id = id;
 152
 153         if (nn->port) {
 154                 err = nfp_devlink_port_register(pf->app, nn->port);
 155                 if (err)
 156                         return err;
 157         }
 158
 159         err = nfp_net_init(nn);
 160         if (err)
 161                 goto err_devlink_port_clean;
 162
 163         nfp_net_debugfs_vnic_add(nn, pf->ddir);
 164
 165         if (nn->port)
 166                 nfp_devlink_port_type_eth_set(nn->port);
 167
 168         nfp_net_info(nn);
 169
 170         if (nfp_net_is_data_vnic(nn)) {
 171                 err = nfp_app_vnic_init(pf->app, nn);
 172                 if (err)
 173                         goto err_devlink_port_type_clean;
 174         }
 175
 176         return 0;
 177
 178 err_devlink_port_type_clean:
 179         if (nn->port)
 180                 nfp_devlink_port_type_clear(nn->port);
 181         nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
 182         nfp_net_clean(nn);
 183 err_devlink_port_clean:
 184         if (nn->port)
 185                 nfp_devlink_port_unregister(nn->port);
 186         return err;
 187 }
 188
 189 static int
 190 nfp_net_pf_alloc_vnics(struct nfp_pf *pf, void __iomem *ctrl_bar,
 191                        void __iomem *qc_bar, int stride)
 192 {
 193         struct nfp_net *nn;
 194         unsigned int i;
 195         int err;
 196
 197         for (i = 0; i < pf->max_data_vnics; i++) {
 198                 nn = nfp_net_pf_alloc_vnic(pf, true, ctrl_bar, qc_bar,
 199                                            stride, i);
 200                 if (IS_ERR(nn)) {
 201                         err = PTR_ERR(nn);
 202                         goto err_free_prev;
 203                 }
 204
 205                 ctrl_bar += NFP_PF_CSR_SLICE_SIZE;
 206
 207                 /* Kill the vNIC if app init marked it as invalid */
 208                 if (nn->port && nn->port->type == NFP_PORT_INVALID)
 209                         nfp_net_pf_free_vnic(pf, nn);
 210         }
 211
 212         if (list_empty(&pf->vnics))
 213                 return -ENODEV;
 214
 215         return 0;
 216
 217 err_free_prev:
 218         nfp_net_pf_free_vnics(pf);
 219         return err;
 220 }
 221
 222 static void nfp_net_pf_clean_vnic(struct nfp_pf *pf, struct nfp_net *nn)
 223 {
 224         if (nfp_net_is_data_vnic(nn))
 225                 nfp_app_vnic_clean(pf->app, nn);
 226         if (nn->port)
 227                 nfp_devlink_port_type_clear(nn->port);
 228         nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
 229         nfp_net_clean(nn);
 230         if (nn->port)
 231                 nfp_devlink_port_unregister(nn->port);
 232 }
 233
 234 static int nfp_net_pf_alloc_irqs(struct nfp_pf *pf)
 235 {
 236         unsigned int wanted_irqs, num_irqs, vnics_left, irqs_left;
 237         struct nfp_net *nn;
 238
 239         /* Get MSI-X vectors */
 240         wanted_irqs = 0;
 241         list_for_each_entry(nn, &pf->vnics, vnic_list)
 242                 wanted_irqs += NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs;
 243         pf->irq_entries = kcalloc(wanted_irqs, sizeof(*pf->irq_entries),
 244                                   GFP_KERNEL);
 245         if (!pf->irq_entries)
 246                 return -ENOMEM;
 247
 248         num_irqs = nfp_net_irqs_alloc(pf->pdev, pf->irq_entries,
 249                                       NFP_NET_MIN_VNIC_IRQS * pf->num_vnics,
 250                                       wanted_irqs);
 251         if (!num_irqs) {
 252                 nfp_warn(pf->cpp, "Unable to allocate MSI-X vectors\n");
 253                 kfree(pf->irq_entries);
 254                 return -ENOMEM;
 255         }
 256
 257         /* Distribute IRQs to vNICs */
 258         irqs_left = num_irqs;
 259         vnics_left = pf->num_vnics;
 260         list_for_each_entry(nn, &pf->vnics, vnic_list) {
 261                 unsigned int n;
 262
 263                 n = min(NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs,
 264                         DIV_ROUND_UP(irqs_left, vnics_left));
 265                 nfp_net_irqs_assign(nn, &pf->irq_entries[num_irqs - irqs_left],
 266                                     n);
 267                 irqs_left -= n;
 268                 vnics_left--;
 269         }
 270
 271         return 0;
 272 }
 273
 274 static void nfp_net_pf_free_irqs(struct nfp_pf *pf)
 275 {
 276         nfp_net_irqs_disable(pf->pdev);
 277         kfree(pf->irq_entries);
 278 }
 279
 280 static int nfp_net_pf_init_vnics(struct nfp_pf *pf)
 281 {
 282         struct nfp_net *nn;
 283         unsigned int id;
 284         int err;
 285
 286         /* Finish vNIC init and register */
 287         id = 0;
 288         list_for_each_entry(nn, &pf->vnics, vnic_list) {
 289                 if (!nfp_net_is_data_vnic(nn))
 290                         continue;
 291                 err = nfp_net_pf_init_vnic(pf, nn, id);
 292                 if (err)
 293                         goto err_prev_deinit;
 294
 295                 id++;
 296         }
 297
 298         return 0;
 299
 300 err_prev_deinit:
 301         list_for_each_entry_continue_reverse(nn, &pf->vnics, vnic_list)
 302                 if (nfp_net_is_data_vnic(nn))
 303                         nfp_net_pf_clean_vnic(pf, nn);
 304         return err;
 305 }
 306
 307 static int
 308 nfp_net_pf_app_init(struct nfp_pf *pf, u8 __iomem *qc_bar, unsigned int stride)
 309 {
 310         struct devlink *devlink = priv_to_devlink(pf);
 311         u8 __iomem *ctrl_bar;
 312         int err;
 313
 314         pf->app = nfp_app_alloc(pf, nfp_net_pf_get_app_id(pf));
 315         if (IS_ERR(pf->app))
 316                 return PTR_ERR(pf->app);
 317
 318         devl_lock(devlink);
 319         err = nfp_app_init(pf->app);
 320         devl_unlock(devlink);
 321         if (err)
 322                 goto err_free;
 323
 324         if (!nfp_app_needs_ctrl_vnic(pf->app))
 325                 return 0;
 326
 327         ctrl_bar = nfp_pf_map_rtsym(pf, "net.ctrl", "_pf%u_net_ctrl_bar",
 328                                     NFP_PF_CSR_SLICE_SIZE, &pf->ctrl_vnic_bar);
 329         if (IS_ERR(ctrl_bar)) {
 330                 nfp_err(pf->cpp, "Failed to find ctrl vNIC memory symbol\n");
 331                 err = PTR_ERR(ctrl_bar);
 332                 goto err_app_clean;
 333         }
 334
 335         pf->ctrl_vnic = nfp_net_pf_alloc_vnic(pf, false, ctrl_bar, qc_bar,
 336                                               stride, 0);
 337         if (IS_ERR(pf->ctrl_vnic)) {
 338                 err = PTR_ERR(pf->ctrl_vnic);
 339                 goto err_unmap;
 340         }
 341
 342         return 0;
 343
 344 err_unmap:
 345         nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
 346 err_app_clean:
 347         devl_lock(devlink);
 348         nfp_app_clean(pf->app);
 349         devl_unlock(devlink);
 350 err_free:
 351         nfp_app_free(pf->app);
 352         pf->app = NULL;
 353         return err;
 354 }
 355
 356 static void nfp_net_pf_app_clean(struct nfp_pf *pf)
 357 {
 358         struct devlink *devlink = priv_to_devlink(pf);
 359
 360         if (pf->ctrl_vnic) {
 361                 nfp_net_pf_free_vnic(pf, pf->ctrl_vnic);
 362                 nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
 363         }
 364
 365         devl_lock(devlink);
 366         nfp_app_clean(pf->app);
 367         devl_unlock(devlink);
 368
 369         nfp_app_free(pf->app);
 370         pf->app = NULL;
 371 }
 372
 373 static int nfp_net_pf_app_start_ctrl(struct nfp_pf *pf)
 374 {
 375         int err;
 376
 377         if (!pf->ctrl_vnic)
 378                 return 0;
 379         err = nfp_net_pf_init_vnic(pf, pf->ctrl_vnic, 0);
 380         if (err)
 381                 return err;
 382
 383         err = nfp_ctrl_open(pf->ctrl_vnic);
 384         if (err)
 385                 goto err_clean_ctrl;
 386
 387         return 0;
 388
 389 err_clean_ctrl:
 390         nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
 391         return err;
 392 }
 393
 394 static void nfp_net_pf_app_stop_ctrl(struct nfp_pf *pf)
 395 {
 396         if (!pf->ctrl_vnic)
 397                 return;
 398         nfp_ctrl_close(pf->ctrl_vnic);
 399         nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
 400 }
 401
 402 static int nfp_net_pf_app_start(struct nfp_pf *pf)
 403 {
 404         int err;
 405
 406         err = nfp_net_pf_app_start_ctrl(pf);
 407         if (err)
 408                 return err;
 409
 410         err = nfp_app_start(pf->app, pf->ctrl_vnic);
 411         if (err)
 412                 goto err_ctrl_stop;
 413
 414         if (pf->num_vfs) {
 415                 err = nfp_app_sriov_enable(pf->app, pf->num_vfs);
 416                 if (err)
 417                         goto err_app_stop;
 418         }
 419
 420         return 0;
 421
 422 err_app_stop:
 423         nfp_app_stop(pf->app);
 424 err_ctrl_stop:
 425         nfp_net_pf_app_stop_ctrl(pf);
 426         return err;
 427 }
 428
 429 static void nfp_net_pf_app_stop(struct nfp_pf *pf)
 430 {
 431         if (pf->num_vfs)
 432                 nfp_app_sriov_disable(pf->app);
 433         nfp_app_stop(pf->app);
 434         nfp_net_pf_app_stop_ctrl(pf);
 435 }
 436
 437 static void nfp_net_pci_unmap_mem(struct nfp_pf *pf)
 438 {
 439         if (pf->vfcfg_tbl2_area)
 440                 nfp_cpp_area_release_free(pf->vfcfg_tbl2_area);
 441         if (pf->vf_cfg_bar)
 442                 nfp_cpp_area_release_free(pf->vf_cfg_bar);
 443         if (pf->mac_stats_bar)
 444                 nfp_cpp_area_release_free(pf->mac_stats_bar);
 445         nfp_cpp_area_release_free(pf->qc_area);
 446         nfp_cpp_area_release_free(pf->data_vnic_bar);
 447 }
 448
 449 static int nfp_net_pci_map_mem(struct nfp_pf *pf)
 450 {
 451         u32 min_size, cpp_id;
 452         u8 __iomem *mem;
 453         int err;
 454
 455         min_size = pf->max_data_vnics * NFP_PF_CSR_SLICE_SIZE;
 456         mem = nfp_pf_map_rtsym(pf, "net.bar0", "_pf%d_net_bar0",
 457                                min_size, &pf->data_vnic_bar);
 458         if (IS_ERR(mem)) {
 459                 nfp_err(pf->cpp, "Failed to find data vNIC memory symbol\n");
 460                 return PTR_ERR(mem);
 461         }
 462
 463         if (pf->eth_tbl) {
 464                 min_size =  NFP_MAC_STATS_SIZE * (pf->eth_tbl->max_index + 1);
 465                 pf->mac_stats_mem = nfp_rtsym_map(pf->rtbl, "_mac_stats",
 466                                                   "net.macstats", min_size,
 467                                                   &pf->mac_stats_bar);
 468                 if (IS_ERR(pf->mac_stats_mem)) {
 469                         if (PTR_ERR(pf->mac_stats_mem) != -ENOENT) {
 470                                 err = PTR_ERR(pf->mac_stats_mem);
 471                                 goto err_unmap_ctrl;
 472                         }
 473                         pf->mac_stats_mem = NULL;
 474                 }
 475         }
 476
 477         pf->vf_cfg_mem = nfp_pf_map_rtsym(pf, "net.vfcfg", "_pf%d_net_vf_bar",
 478                                           NFP_NET_CFG_BAR_SZ * pf->limit_vfs,
 479                                           &pf->vf_cfg_bar);
 480         if (IS_ERR(pf->vf_cfg_mem)) {
 481                 if (PTR_ERR(pf->vf_cfg_mem) != -ENOENT) {
 482                         err = PTR_ERR(pf->vf_cfg_mem);
 483                         goto err_unmap_mac_stats;
 484                 }
 485                 pf->vf_cfg_mem = NULL;
 486         }
 487
 488         min_size = NFP_NET_VF_CFG_SZ * pf->limit_vfs + NFP_NET_VF_CFG_MB_SZ;
 489         pf->vfcfg_tbl2 = nfp_pf_map_rtsym(pf, "net.vfcfg_tbl2",
 490                                           "_pf%d_net_vf_cfg2",
 491                                           min_size, &pf->vfcfg_tbl2_area);
 492         if (IS_ERR(pf->vfcfg_tbl2)) {
 493                 if (PTR_ERR(pf->vfcfg_tbl2) != -ENOENT) {
 494                         err = PTR_ERR(pf->vfcfg_tbl2);
 495                         goto err_unmap_vf_cfg;
 496                 }
 497                 pf->vfcfg_tbl2 = NULL;
 498         }
 499
 500         cpp_id = NFP_CPP_ISLAND_ID(0, NFP_CPP_ACTION_RW, 0, 0);
 501         mem = nfp_cpp_map_area(pf->cpp, "net.qc", cpp_id,
 502                                nfp_qcp_queue_offset(pf->dev_info, 0),
 503                                pf->dev_info->qc_area_sz, &pf->qc_area);
 504         if (IS_ERR(mem)) {
 505                 nfp_err(pf->cpp, "Failed to map Queue Controller area.\n");
 506                 err = PTR_ERR(mem);
 507                 goto err_unmap_vfcfg_tbl2;
 508         }
 509
 510         return 0;
 511
 512 err_unmap_vfcfg_tbl2:
 513         if (pf->vfcfg_tbl2_area)
 514                 nfp_cpp_area_release_free(pf->vfcfg_tbl2_area);
 515 err_unmap_vf_cfg:
 516         if (pf->vf_cfg_bar)
 517                 nfp_cpp_area_release_free(pf->vf_cfg_bar);
 518 err_unmap_mac_stats:
 519         if (pf->mac_stats_bar)
 520                 nfp_cpp_area_release_free(pf->mac_stats_bar);
 521 err_unmap_ctrl:
 522         nfp_cpp_area_release_free(pf->data_vnic_bar);
 523         return err;
 524 }
 525
 526 static int
 527 nfp_net_eth_port_update(struct nfp_cpp *cpp, struct nfp_port *port,
 528                         struct nfp_eth_table *eth_table)
 529 {
 530         struct nfp_eth_table_port *eth_port;
 531
 532         ASSERT_RTNL();
 533
 534         eth_port = nfp_net_find_port(eth_table, port->eth_id);
 535         if (!eth_port) {
 536                 set_bit(NFP_PORT_CHANGED, &port->flags);
 537                 nfp_warn(cpp, "Warning: port #%d not present after reconfig\n",
 538                          port->eth_id);
 539                 return -EIO;
 540         }
 541         if (eth_port->override_changed) {
 542                 nfp_warn(cpp, "Port #%d config changed, unregistering. Driver reload required before port will be operational again.\n", port->eth_id);
 543                 port->type = NFP_PORT_INVALID;
 544         }
 545
 546         memcpy(port->eth_port, eth_port, sizeof(*eth_port));
 547
 548         return 0;
 549 }
 550
 551 int nfp_net_refresh_port_table_sync(struct nfp_pf *pf)
 552 {
 553         struct devlink *devlink = priv_to_devlink(pf);
 554         struct nfp_eth_table *eth_table;
 555         struct nfp_net *nn, *next;
 556         struct nfp_port *port;
 557         int err;
 558
 559         devl_assert_locked(devlink);
 560
 561         /* Check for nfp_net_pci_remove() racing against us */
 562         if (list_empty(&pf->vnics))
 563                 return 0;
 564
 565         /* Update state of all ports */
 566         rtnl_lock();
 567         list_for_each_entry(port, &pf->ports, port_list)
 568                 clear_bit(NFP_PORT_CHANGED, &port->flags);
 569
 570         eth_table = nfp_eth_read_ports(pf->cpp);
 571         if (!eth_table) {
 572                 list_for_each_entry(port, &pf->ports, port_list)
 573                         if (__nfp_port_get_eth_port(port))
 574                                 set_bit(NFP_PORT_CHANGED, &port->flags);
 575                 rtnl_unlock();
 576                 nfp_err(pf->cpp, "Error refreshing port config!\n");
 577                 return -EIO;
 578         }
 579
 580         list_for_each_entry(port, &pf->ports, port_list)
 581                 if (__nfp_port_get_eth_port(port))
 582                         nfp_net_eth_port_update(pf->cpp, port, eth_table);
 583         rtnl_unlock();
 584
 585         kfree(eth_table);
 586
 587         /* Resync repr state. This may cause reprs to be removed. */
 588         err = nfp_reprs_resync_phys_ports(pf->app);
 589         if (err)
 590                 return err;
 591
 592         /* Shoot off the ports which became invalid */
 593         list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
 594                 if (!nn->port || nn->port->type != NFP_PORT_INVALID)
 595                         continue;
 596
 597                 nfp_net_pf_clean_vnic(pf, nn);
 598                 nfp_net_pf_free_vnic(pf, nn);
 599         }
 600
 601         return 0;
 602 }
 603
 604 static void nfp_net_refresh_vnics(struct work_struct *work)
 605 {
 606         struct nfp_pf *pf = container_of(work, struct nfp_pf,
 607                                          port_refresh_work);
 608         struct devlink *devlink = priv_to_devlink(pf);
 609
 610         devl_lock(devlink);
 611         nfp_net_refresh_port_table_sync(pf);
 612         devl_unlock(devlink);
 613 }
 614
 615 void nfp_net_refresh_port_table(struct nfp_port *port)
 616 {
 617         struct nfp_pf *pf = port->app->pf;
 618
 619         set_bit(NFP_PORT_CHANGED, &port->flags);
 620
 621         queue_work(pf->wq, &pf->port_refresh_work);
 622 }
 623
 624 int nfp_net_refresh_eth_port(struct nfp_port *port)
 625 {
 626         struct nfp_cpp *cpp = port->app->cpp;
 627         struct nfp_eth_table *eth_table;
 628         int ret;
 629
 630         clear_bit(NFP_PORT_CHANGED, &port->flags);
 631
 632         eth_table = nfp_eth_read_ports(cpp);
 633         if (!eth_table) {
 634                 set_bit(NFP_PORT_CHANGED, &port->flags);
 635                 nfp_err(cpp, "Error refreshing port state table!\n");
 636                 return -EIO;
 637         }
 638
 639         ret = nfp_net_eth_port_update(cpp, port, eth_table);
 640
 641         kfree(eth_table);
 642
 643         return ret;
 644 }
 645
 646 /*
 647  * PCI device functions
 648  */
 649 int nfp_net_pci_probe(struct nfp_pf *pf)
 650 {
 651         struct devlink *devlink = priv_to_devlink(pf);
 652         struct nfp_net_fw_version fw_ver;
 653         u8 __iomem *ctrl_bar, *qc_bar;
 654         int stride;
 655         int err;
 656
 657         INIT_WORK(&pf->port_refresh_work, nfp_net_refresh_vnics);
 658
 659         if (!pf->rtbl) {
 660                 nfp_err(pf->cpp, "No %s, giving up.\n",
 661                         pf->fw_loaded ? "symbol table" : "firmware found");
 662                 return -EINVAL;
 663         }
 664
 665         pf->max_data_vnics = nfp_net_pf_get_num_ports(pf);
 666         if ((int)pf->max_data_vnics < 0)
 667                 return pf->max_data_vnics;
 668
 669         err = nfp_net_pci_map_mem(pf);
 670         if (err)
 671                 return err;
 672
 673         ctrl_bar = nfp_cpp_area_iomem(pf->data_vnic_bar);
 674         qc_bar = nfp_cpp_area_iomem(pf->qc_area);
 675         if (!ctrl_bar || !qc_bar) {
 676                 err = -EIO;
 677                 goto err_unmap;
 678         }
 679
 680         nfp_net_get_fw_version(&fw_ver, ctrl_bar);
 681         if (fw_ver.extend & NFP_NET_CFG_VERSION_RESERVED_MASK ||
 682             fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
 683                 nfp_err(pf->cpp, "Unknown Firmware ABI %d.%d.%d.%d\n",
 684                         fw_ver.extend, fw_ver.class,
 685                         fw_ver.major, fw_ver.minor);
 686                 err = -EINVAL;
 687                 goto err_unmap;
 688         }
 689
 690         /* Determine stride */
 691         if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1)) {
 692                 stride = 2;
 693                 nfp_warn(pf->cpp, "OBSOLETE Firmware detected - VF isolation not available\n");
 694         } else {
 695                 switch (fw_ver.major) {
 696                 case 1 ... 5:
 697                         stride = 4;
 698                         break;
 699                 default:
 700                         nfp_err(pf->cpp, "Unsupported Firmware ABI %d.%d.%d.%d\n",
 701                                 fw_ver.extend, fw_ver.class,
 702                                 fw_ver.major, fw_ver.minor);
 703                         err = -EINVAL;
 704                         goto err_unmap;
 705                 }
 706         }
 707
 708         err = nfp_net_pf_app_init(pf, qc_bar, stride);
 709         if (err)
 710                 goto err_unmap;
 711
 712         err = nfp_shared_buf_register(pf);
 713         if (err)
 714                 goto err_devlink_unreg;
 715
 716         err = nfp_devlink_params_register(pf);
 717         if (err)
 718                 goto err_shared_buf_unreg;
 719
 720         devl_lock(devlink);
 721         pf->ddir = nfp_net_debugfs_device_add(pf->pdev);
 722
 723         /* Allocate the vnics and do basic init */
 724         err = nfp_net_pf_alloc_vnics(pf, ctrl_bar, qc_bar, stride);
 725         if (err)
 726                 goto err_clean_ddir;
 727
 728         err = nfp_net_pf_alloc_irqs(pf);
 729         if (err)
 730                 goto err_free_vnics;
 731
 732         err = nfp_net_pf_app_start(pf);
 733         if (err)
 734                 goto err_free_irqs;
 735
 736         err = nfp_net_pf_init_vnics(pf);
 737         if (err)
 738                 goto err_stop_app;
 739
 740         devl_unlock(devlink);
 741         devlink_register(devlink);
 742
 743         return 0;
 744
 745 err_stop_app:
 746         nfp_net_pf_app_stop(pf);
 747 err_free_irqs:
 748         nfp_net_pf_free_irqs(pf);
 749 err_free_vnics:
 750         nfp_net_pf_free_vnics(pf);
 751 err_clean_ddir:
 752         nfp_net_debugfs_dir_clean(&pf->ddir);
 753         devl_unlock(devlink);
 754         nfp_devlink_params_unregister(pf);
 755 err_shared_buf_unreg:
 756         nfp_shared_buf_unregister(pf);
 757 err_devlink_unreg:
 758         cancel_work_sync(&pf->port_refresh_work);
 759         nfp_net_pf_app_clean(pf);
 760 err_unmap:
 761         nfp_net_pci_unmap_mem(pf);
 762         return err;
 763 }
 764
 765 void nfp_net_pci_remove(struct nfp_pf *pf)
 766 {
 767         struct devlink *devlink = priv_to_devlink(pf);
 768         struct nfp_net *nn, *next;
 769
 770         devlink_unregister(priv_to_devlink(pf));
 771         devl_lock(devlink);
 772         list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
 773                 if (!nfp_net_is_data_vnic(nn))
 774                         continue;
 775                 nfp_net_pf_clean_vnic(pf, nn);
 776                 nfp_net_pf_free_vnic(pf, nn);
 777         }
 778
 779         nfp_net_pf_app_stop(pf);
 780         /* stop app first, to avoid double free of ctrl vNIC's ddir */
 781         nfp_net_debugfs_dir_clean(&pf->ddir);
 782
 783         devl_unlock(devlink);
 784
 785         nfp_devlink_params_unregister(pf);
 786         nfp_shared_buf_unregister(pf);
 787
 788         nfp_net_pf_free_irqs(pf);
 789         nfp_net_pf_app_clean(pf);
 790         nfp_net_pci_unmap_mem(pf);
 791
 792         cancel_work_sync(&pf->port_refresh_work);
 793 }