drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c

   1 /* Broadcom NetXtreme-C/E network driver.
   2  *
   3  * Copyright (c) 2014-2015 Broadcom Corporation
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/pci.h>
  12 #include <linux/netdevice.h>
  13 #include <linux/if_vlan.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/etherdevice.h>
  16 #include "bnxt_hsi.h"
  17 #include "bnxt.h"
  18 #include "bnxt_sriov.h"
  19 #include "bnxt_ethtool.h"
  20
  21 #ifdef CONFIG_BNXT_SRIOV
  22 static int bnxt_vf_ndo_prep(struct bnxt *bp, int vf_id)
  23 {
  24         if (bp->state != BNXT_STATE_OPEN) {
  25                 netdev_err(bp->dev, "vf ndo called though PF is down\n");
  26                 return -EINVAL;
  27         }
  28         if (!bp->pf.active_vfs) {
  29                 netdev_err(bp->dev, "vf ndo called though sriov is disabled\n");
  30                 return -EINVAL;
  31         }
  32         if (vf_id >= bp->pf.max_vfs) {
  33                 netdev_err(bp->dev, "Invalid VF id %d\n", vf_id);
  34                 return -EINVAL;
  35         }
  36         return 0;
  37 }
  38
  39 int bnxt_set_vf_spoofchk(struct net_device *dev, int vf_id, bool setting)
  40 {
  41         struct hwrm_func_cfg_input req = {0};
  42         struct bnxt *bp = netdev_priv(dev);
  43         struct bnxt_vf_info *vf;
  44         bool old_setting = false;
  45         u32 func_flags;
  46         int rc;
  47
  48         rc = bnxt_vf_ndo_prep(bp, vf_id);
  49         if (rc)
  50                 return rc;
  51
  52         vf = &bp->pf.vf[vf_id];
  53         if (vf->flags & BNXT_VF_SPOOFCHK)
  54                 old_setting = true;
  55         if (old_setting == setting)
  56                 return 0;
  57
  58         func_flags = vf->func_flags;
  59         if (setting)
  60                 func_flags |= FUNC_CFG_REQ_FLAGS_SRC_MAC_ADDR_CHECK;
  61         else
  62                 func_flags &= ~FUNC_CFG_REQ_FLAGS_SRC_MAC_ADDR_CHECK;
  63         /*TODO: if the driver supports VLAN filter on guest VLAN,
  64          * the spoof check should also include vlan anti-spoofing
  65          */
  66         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_CFG, -1, -1);
  67         req.vf_id = cpu_to_le16(vf->fw_fid);
  68         req.flags = cpu_to_le32(func_flags);
  69         rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
  70         if (!rc) {
  71                 vf->func_flags = func_flags;
  72                 if (setting)
  73                         vf->flags |= BNXT_VF_SPOOFCHK;
  74                 else
  75                         vf->flags &= ~BNXT_VF_SPOOFCHK;
  76         }
  77         return rc;
  78 }
  79
  80 int bnxt_get_vf_config(struct net_device *dev, int vf_id,
  81                        struct ifla_vf_info *ivi)
  82 {
  83         struct bnxt *bp = netdev_priv(dev);
  84         struct bnxt_vf_info *vf;
  85         int rc;
  86
  87         rc = bnxt_vf_ndo_prep(bp, vf_id);
  88         if (rc)
  89                 return rc;
  90
  91         ivi->vf = vf_id;
  92         vf = &bp->pf.vf[vf_id];
  93
  94         memcpy(&ivi->mac, vf->mac_addr, ETH_ALEN);
  95         ivi->max_tx_rate = vf->max_tx_rate;
  96         ivi->min_tx_rate = vf->min_tx_rate;
  97         ivi->vlan = vf->vlan;
  98         ivi->qos = vf->flags & BNXT_VF_QOS;
  99         ivi->spoofchk = vf->flags & BNXT_VF_SPOOFCHK;
 100         if (!(vf->flags & BNXT_VF_LINK_FORCED))
 101                 ivi->linkstate = IFLA_VF_LINK_STATE_AUTO;
 102         else if (vf->flags & BNXT_VF_LINK_UP)
 103                 ivi->linkstate = IFLA_VF_LINK_STATE_ENABLE;
 104         else
 105                 ivi->linkstate = IFLA_VF_LINK_STATE_DISABLE;
 106
 107         return 0;
 108 }
 109
 110 int bnxt_set_vf_mac(struct net_device *dev, int vf_id, u8 *mac)
 111 {
 112         struct hwrm_func_cfg_input req = {0};
 113         struct bnxt *bp = netdev_priv(dev);
 114         struct bnxt_vf_info *vf;
 115         int rc;
 116
 117         rc = bnxt_vf_ndo_prep(bp, vf_id);
 118         if (rc)
 119                 return rc;
 120         /* reject bc or mc mac addr, zero mac addr means allow
 121          * VF to use its own mac addr
 122          */
 123         if (is_multicast_ether_addr(mac)) {
 124                 netdev_err(dev, "Invalid VF ethernet address\n");
 125                 return -EINVAL;
 126         }
 127         vf = &bp->pf.vf[vf_id];
 128
 129         memcpy(vf->mac_addr, mac, ETH_ALEN);
 130         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_CFG, -1, -1);
 131         req.vf_id = cpu_to_le16(vf->fw_fid);
 132         req.flags = cpu_to_le32(vf->func_flags);
 133         req.enables = cpu_to_le32(FUNC_CFG_REQ_ENABLES_DFLT_MAC_ADDR);
 134         memcpy(req.dflt_mac_addr, mac, ETH_ALEN);
 135         return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 136 }
 137
 138 int bnxt_set_vf_vlan(struct net_device *dev, int vf_id, u16 vlan_id, u8 qos)
 139 {
 140         struct hwrm_func_cfg_input req = {0};
 141         struct bnxt *bp = netdev_priv(dev);
 142         struct bnxt_vf_info *vf;
 143         u16 vlan_tag;
 144         int rc;
 145
 146         rc = bnxt_vf_ndo_prep(bp, vf_id);
 147         if (rc)
 148                 return rc;
 149
 150         /* TODO: needed to implement proper handling of user priority,
 151          * currently fail the command if there is valid priority
 152          */
 153         if (vlan_id > 4095 || qos)
 154                 return -EINVAL;
 155
 156         vf = &bp->pf.vf[vf_id];
 157         vlan_tag = vlan_id;
 158         if (vlan_tag == vf->vlan)
 159                 return 0;
 160
 161         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_CFG, -1, -1);
 162         req.vf_id = cpu_to_le16(vf->fw_fid);
 163         req.flags = cpu_to_le32(vf->func_flags);
 164         req.dflt_vlan = cpu_to_le16(vlan_tag);
 165         req.enables = cpu_to_le32(FUNC_CFG_REQ_ENABLES_DFLT_VLAN);
 166         rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 167         if (!rc)
 168                 vf->vlan = vlan_tag;
 169         return rc;
 170 }
 171
 172 int bnxt_set_vf_bw(struct net_device *dev, int vf_id, int min_tx_rate,
 173                    int max_tx_rate)
 174 {
 175         struct hwrm_func_cfg_input req = {0};
 176         struct bnxt *bp = netdev_priv(dev);
 177         struct bnxt_vf_info *vf;
 178         u32 pf_link_speed;
 179         int rc;
 180
 181         rc = bnxt_vf_ndo_prep(bp, vf_id);
 182         if (rc)
 183                 return rc;
 184
 185         vf = &bp->pf.vf[vf_id];
 186         pf_link_speed = bnxt_fw_to_ethtool_speed(bp->link_info.link_speed);
 187         if (max_tx_rate > pf_link_speed) {
 188                 netdev_info(bp->dev, "max tx rate %d exceed PF link speed for VF %d\n",
 189                             max_tx_rate, vf_id);
 190                 return -EINVAL;
 191         }
 192
 193         if (min_tx_rate > pf_link_speed || min_tx_rate > max_tx_rate) {
 194                 netdev_info(bp->dev, "min tx rate %d is invalid for VF %d\n",
 195                             min_tx_rate, vf_id);
 196                 return -EINVAL;
 197         }
 198         if (min_tx_rate == vf->min_tx_rate && max_tx_rate == vf->max_tx_rate)
 199                 return 0;
 200         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_CFG, -1, -1);
 201         req.vf_id = cpu_to_le16(vf->fw_fid);
 202         req.flags = cpu_to_le32(vf->func_flags);
 203         req.enables = cpu_to_le32(FUNC_CFG_REQ_ENABLES_MAX_BW);
 204         req.max_bw = cpu_to_le32(max_tx_rate);
 205         req.enables |= cpu_to_le32(FUNC_CFG_REQ_ENABLES_MIN_BW);
 206         req.min_bw = cpu_to_le32(min_tx_rate);
 207         rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 208         if (!rc) {
 209                 vf->min_tx_rate = min_tx_rate;
 210                 vf->max_tx_rate = max_tx_rate;
 211         }
 212         return rc;
 213 }
 214
 215 int bnxt_set_vf_link_state(struct net_device *dev, int vf_id, int link)
 216 {
 217         struct bnxt *bp = netdev_priv(dev);
 218         struct bnxt_vf_info *vf;
 219         int rc;
 220
 221         rc = bnxt_vf_ndo_prep(bp, vf_id);
 222         if (rc)
 223                 return rc;
 224
 225         vf = &bp->pf.vf[vf_id];
 226
 227         vf->flags &= ~(BNXT_VF_LINK_UP | BNXT_VF_LINK_FORCED);
 228         switch (link) {
 229         case IFLA_VF_LINK_STATE_AUTO:
 230                 vf->flags |= BNXT_VF_LINK_UP;
 231                 break;
 232         case IFLA_VF_LINK_STATE_DISABLE:
 233                 vf->flags |= BNXT_VF_LINK_FORCED;
 234                 break;
 235         case IFLA_VF_LINK_STATE_ENABLE:
 236                 vf->flags |= BNXT_VF_LINK_UP | BNXT_VF_LINK_FORCED;
 237                 break;
 238         default:
 239                 netdev_err(bp->dev, "Invalid link option\n");
 240                 rc = -EINVAL;
 241                 break;
 242         }
 243         /* CHIMP TODO: send msg to VF to update new link state */
 244
 245         return rc;
 246 }
 247
 248 static int bnxt_set_vf_attr(struct bnxt *bp, int num_vfs)
 249 {
 250         int i;
 251         struct bnxt_vf_info *vf;
 252
 253         for (i = 0; i < num_vfs; i++) {
 254                 vf = &bp->pf.vf[i];
 255                 memset(vf, 0, sizeof(*vf));
 256                 vf->flags = BNXT_VF_QOS | BNXT_VF_LINK_UP;
 257         }
 258         return 0;
 259 }
 260
 261 static int bnxt_hwrm_func_vf_resource_free(struct bnxt *bp, int num_vfs)
 262 {
 263         int i, rc = 0;
 264         struct bnxt_pf_info *pf = &bp->pf;
 265         struct hwrm_func_vf_resc_free_input req = {0};
 266
 267         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_VF_RESC_FREE, -1, -1);
 268
 269         mutex_lock(&bp->hwrm_cmd_lock);
 270         for (i = pf->first_vf_id; i < pf->first_vf_id + num_vfs; i++) {
 271                 req.vf_id = cpu_to_le16(i);
 272                 rc = _hwrm_send_message(bp, &req, sizeof(req),
 273                                         HWRM_CMD_TIMEOUT);
 274                 if (rc)
 275                         break;
 276         }
 277         mutex_unlock(&bp->hwrm_cmd_lock);
 278         return rc;
 279 }
 280
 281 static void bnxt_free_vf_resources(struct bnxt *bp)
 282 {
 283         struct pci_dev *pdev = bp->pdev;
 284         int i;
 285
 286         kfree(bp->pf.vf_event_bmap);
 287         bp->pf.vf_event_bmap = NULL;
 288
 289         for (i = 0; i < 4; i++) {
 290                 if (bp->pf.hwrm_cmd_req_addr[i]) {
 291                         dma_free_coherent(&pdev->dev, BNXT_PAGE_SIZE,
 292                                           bp->pf.hwrm_cmd_req_addr[i],
 293                                           bp->pf.hwrm_cmd_req_dma_addr[i]);
 294                         bp->pf.hwrm_cmd_req_addr[i] = NULL;
 295                 }
 296         }
 297
 298         kfree(bp->pf.vf);
 299         bp->pf.vf = NULL;
 300 }
 301
 302 static int bnxt_alloc_vf_resources(struct bnxt *bp, int num_vfs)
 303 {
 304         struct pci_dev *pdev = bp->pdev;
 305         u32 nr_pages, size, i, j, k = 0;
 306
 307         bp->pf.vf = kcalloc(num_vfs, sizeof(struct bnxt_vf_info), GFP_KERNEL);
 308         if (!bp->pf.vf)
 309                 return -ENOMEM;
 310
 311         bnxt_set_vf_attr(bp, num_vfs);
 312
 313         size = num_vfs * BNXT_HWRM_REQ_MAX_SIZE;
 314         nr_pages = size / BNXT_PAGE_SIZE;
 315         if (size & (BNXT_PAGE_SIZE - 1))
 316                 nr_pages++;
 317
 318         for (i = 0; i < nr_pages; i++) {
 319                 bp->pf.hwrm_cmd_req_addr[i] =
 320                         dma_alloc_coherent(&pdev->dev, BNXT_PAGE_SIZE,
 321                                            &bp->pf.hwrm_cmd_req_dma_addr[i],
 322                                            GFP_KERNEL);
 323
 324                 if (!bp->pf.hwrm_cmd_req_addr[i])
 325                         return -ENOMEM;
 326
 327                 for (j = 0; j < BNXT_HWRM_REQS_PER_PAGE && k < num_vfs; j++) {
 328                         struct bnxt_vf_info *vf = &bp->pf.vf[k];
 329
 330                         vf->hwrm_cmd_req_addr = bp->pf.hwrm_cmd_req_addr[i] +
 331                                                 j * BNXT_HWRM_REQ_MAX_SIZE;
 332                         vf->hwrm_cmd_req_dma_addr =
 333                                 bp->pf.hwrm_cmd_req_dma_addr[i] + j *
 334                                 BNXT_HWRM_REQ_MAX_SIZE;
 335                         k++;
 336                 }
 337         }
 338
 339         /* Max 128 VF's */
 340         bp->pf.vf_event_bmap = kzalloc(16, GFP_KERNEL);
 341         if (!bp->pf.vf_event_bmap)
 342                 return -ENOMEM;
 343
 344         bp->pf.hwrm_cmd_req_pages = nr_pages;
 345         return 0;
 346 }
 347
 348 static int bnxt_hwrm_func_buf_rgtr(struct bnxt *bp)
 349 {
 350         struct hwrm_func_buf_rgtr_input req = {0};
 351
 352         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_BUF_RGTR, -1, -1);
 353
 354         req.req_buf_num_pages = cpu_to_le16(bp->pf.hwrm_cmd_req_pages);
 355         req.req_buf_page_size = cpu_to_le16(BNXT_PAGE_SHIFT);
 356         req.req_buf_len = cpu_to_le16(BNXT_HWRM_REQ_MAX_SIZE);
 357         req.req_buf_page_addr0 = cpu_to_le64(bp->pf.hwrm_cmd_req_dma_addr[0]);
 358         req.req_buf_page_addr1 = cpu_to_le64(bp->pf.hwrm_cmd_req_dma_addr[1]);
 359         req.req_buf_page_addr2 = cpu_to_le64(bp->pf.hwrm_cmd_req_dma_addr[2]);
 360         req.req_buf_page_addr3 = cpu_to_le64(bp->pf.hwrm_cmd_req_dma_addr[3]);
 361
 362         return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 363 }
 364
 365 /* only call by PF to reserve resources for VF */
 366 static int bnxt_hwrm_func_cfg(struct bnxt *bp, int *num_vfs)
 367 {
 368         u32 rc = 0, mtu, i;
 369         u16 vf_tx_rings, vf_rx_rings, vf_cp_rings, vf_stat_ctx, vf_vnics;
 370         struct hwrm_func_cfg_input req = {0};
 371         struct bnxt_pf_info *pf = &bp->pf;
 372
 373         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_CFG, -1, -1);
 374
 375         /* Remaining rings are distributed equally amongs VF's for now */
 376         /* TODO: the following workaroud is needed to restrict total number
 377          * of vf_cp_rings not exceed number of HW ring groups. This WA should
 378          * be removed once new HWRM provides HW ring groups capability in
 379          * hwrm_func_qcap.
 380          */
 381         vf_cp_rings = min_t(u16, bp->pf.max_cp_rings, bp->pf.max_stat_ctxs);
 382         vf_cp_rings = (vf_cp_rings - bp->cp_nr_rings) / *num_vfs;
 383         /* TODO: restore this logic below once the WA above is removed */
 384         /* vf_cp_rings = (bp->pf.max_cp_rings - bp->cp_nr_rings) / *num_vfs; */
 385         vf_stat_ctx = (bp->pf.max_stat_ctxs - bp->num_stat_ctxs) / *num_vfs;
 386         if (bp->flags & BNXT_FLAG_AGG_RINGS)
 387                 vf_rx_rings = (bp->pf.max_rx_rings - bp->rx_nr_rings * 2) /
 388                               *num_vfs;
 389         else
 390                 vf_rx_rings = (bp->pf.max_rx_rings - bp->rx_nr_rings) /
 391                               *num_vfs;
 392         vf_tx_rings = (bp->pf.max_tx_rings - bp->tx_nr_rings) / *num_vfs;
 393
 394         req.enables = cpu_to_le32(FUNC_CFG_REQ_ENABLES_MTU |
 395                                   FUNC_CFG_REQ_ENABLES_MRU |
 396                                   FUNC_CFG_REQ_ENABLES_NUM_RSSCOS_CTXS |
 397                                   FUNC_CFG_REQ_ENABLES_NUM_STAT_CTXS |
 398                                   FUNC_CFG_REQ_ENABLES_NUM_CMPL_RINGS |
 399                                   FUNC_CFG_REQ_ENABLES_NUM_TX_RINGS |
 400                                   FUNC_CFG_REQ_ENABLES_NUM_RX_RINGS |
 401                                   FUNC_CFG_REQ_ENABLES_NUM_L2_CTXS |
 402                                   FUNC_CFG_REQ_ENABLES_NUM_VNICS);
 403
 404         mtu = bp->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 405         req.mru = cpu_to_le16(mtu);
 406         req.mtu = cpu_to_le16(mtu);
 407
 408         req.num_rsscos_ctxs = cpu_to_le16(1);
 409         req.num_cmpl_rings = cpu_to_le16(vf_cp_rings);
 410         req.num_tx_rings = cpu_to_le16(vf_tx_rings);
 411         req.num_rx_rings = cpu_to_le16(vf_rx_rings);
 412         req.num_l2_ctxs = cpu_to_le16(4);
 413         vf_vnics = 1;
 414
 415         req.num_vnics = cpu_to_le16(vf_vnics);
 416         /* FIXME spec currently uses 1 bit for stats ctx */
 417         req.num_stat_ctxs = cpu_to_le16(vf_stat_ctx);
 418
 419         mutex_lock(&bp->hwrm_cmd_lock);
 420         for (i = 0; i < *num_vfs; i++) {
 421                 req.vf_id = cpu_to_le16(pf->first_vf_id + i);
 422                 rc = _hwrm_send_message(bp, &req, sizeof(req),
 423                                         HWRM_CMD_TIMEOUT);
 424                 if (rc)
 425                         break;
 426                 bp->pf.active_vfs = i + 1;
 427                 bp->pf.vf[i].fw_fid = le16_to_cpu(req.vf_id);
 428         }
 429         mutex_unlock(&bp->hwrm_cmd_lock);
 430         if (!rc) {
 431                 bp->pf.max_pf_tx_rings = bp->tx_nr_rings;
 432                 if (bp->flags & BNXT_FLAG_AGG_RINGS)
 433                         bp->pf.max_pf_rx_rings = bp->rx_nr_rings * 2;
 434                 else
 435                         bp->pf.max_pf_rx_rings = bp->rx_nr_rings;
 436         }
 437         return rc;
 438 }
 439
 440 static int bnxt_sriov_enable(struct bnxt *bp, int *num_vfs)
 441 {
 442         int rc = 0, vfs_supported;
 443         int min_rx_rings, min_tx_rings, min_rss_ctxs;
 444         int tx_ok = 0, rx_ok = 0, rss_ok = 0;
 445
 446         /* Check if we can enable requested num of vf's. At a mininum
 447          * we require 1 RX 1 TX rings for each VF. In this minimum conf
 448          * features like TPA will not be available.
 449          */
 450         vfs_supported = *num_vfs;
 451
 452         while (vfs_supported) {
 453                 min_rx_rings = vfs_supported;
 454                 min_tx_rings = vfs_supported;
 455                 min_rss_ctxs = vfs_supported;
 456
 457                 if (bp->flags & BNXT_FLAG_AGG_RINGS) {
 458                         if (bp->pf.max_rx_rings - bp->rx_nr_rings * 2 >=
 459                             min_rx_rings)
 460                                 rx_ok = 1;
 461                 } else {
 462                         if (bp->pf.max_rx_rings - bp->rx_nr_rings >=
 463                             min_rx_rings)
 464                                 rx_ok = 1;
 465                 }
 466
 467                 if (bp->pf.max_tx_rings - bp->tx_nr_rings >= min_tx_rings)
 468                         tx_ok = 1;
 469
 470                 if (bp->pf.max_rsscos_ctxs - bp->rsscos_nr_ctxs >= min_rss_ctxs)
 471                         rss_ok = 1;
 472
 473                 if (tx_ok && rx_ok && rss_ok)
 474                         break;
 475
 476                 vfs_supported--;
 477         }
 478
 479         if (!vfs_supported) {
 480                 netdev_err(bp->dev, "Cannot enable VF's as all resources are used by PF\n");
 481                 return -EINVAL;
 482         }
 483
 484         if (vfs_supported != *num_vfs) {
 485                 netdev_info(bp->dev, "Requested VFs %d, can enable %d\n",
 486                             *num_vfs, vfs_supported);
 487                 *num_vfs = vfs_supported;
 488         }
 489
 490         rc = bnxt_alloc_vf_resources(bp, *num_vfs);
 491         if (rc)
 492                 goto err_out1;
 493
 494         /* Reserve resources for VFs */
 495         rc = bnxt_hwrm_func_cfg(bp, num_vfs);
 496         if (rc)
 497                 goto err_out2;
 498
 499         /* Register buffers for VFs */
 500         rc = bnxt_hwrm_func_buf_rgtr(bp);
 501         if (rc)
 502                 goto err_out2;
 503
 504         rc = pci_enable_sriov(bp->pdev, *num_vfs);
 505         if (rc)
 506                 goto err_out2;
 507
 508         return 0;
 509
 510 err_out2:
 511         /* Free the resources reserved for various VF's */
 512         bnxt_hwrm_func_vf_resource_free(bp, *num_vfs);
 513
 514 err_out1:
 515         bnxt_free_vf_resources(bp);
 516
 517         return rc;
 518 }
 519
 520 void bnxt_sriov_disable(struct bnxt *bp)
 521 {
 522         u16 num_vfs = pci_num_vf(bp->pdev);
 523
 524         if (!num_vfs)
 525                 return;
 526
 527         if (pci_vfs_assigned(bp->pdev)) {
 528                 netdev_warn(bp->dev, "Unable to free %d VFs because some are assigned to VMs.\n",
 529                             num_vfs);
 530         } else {
 531                 pci_disable_sriov(bp->pdev);
 532                 /* Free the HW resources reserved for various VF's */
 533                 bnxt_hwrm_func_vf_resource_free(bp, num_vfs);
 534         }
 535
 536         bnxt_free_vf_resources(bp);
 537
 538         bp->pf.active_vfs = 0;
 539         bp->pf.max_pf_rx_rings = bp->pf.max_rx_rings;
 540         bp->pf.max_pf_tx_rings = bp->pf.max_tx_rings;
 541 }
 542
 543 int bnxt_sriov_configure(struct pci_dev *pdev, int num_vfs)
 544 {
 545         struct net_device *dev = pci_get_drvdata(pdev);
 546         struct bnxt *bp = netdev_priv(dev);
 547
 548         if (!(bp->flags & BNXT_FLAG_USING_MSIX)) {
 549                 netdev_warn(dev, "Not allow SRIOV if the irq mode is not MSIX\n");
 550                 return 0;
 551         }
 552
 553         rtnl_lock();
 554         if (!netif_running(dev)) {
 555                 netdev_warn(dev, "Reject SRIOV config request since if is down!\n");
 556                 rtnl_unlock();
 557                 return 0;
 558         }
 559         bp->sriov_cfg = true;
 560         rtnl_unlock();
 561
 562         if (pci_vfs_assigned(bp->pdev)) {
 563                 netdev_warn(dev, "Unable to configure SRIOV since some VFs are assigned to VMs.\n");
 564                 num_vfs = 0;
 565                 goto sriov_cfg_exit;
 566         }
 567
 568         /* Check if enabled VFs is same as requested */
 569         if (num_vfs && num_vfs == bp->pf.active_vfs)
 570                 goto sriov_cfg_exit;
 571
 572         /* if there are previous existing VFs, clean them up */
 573         bnxt_sriov_disable(bp);
 574         if (!num_vfs)
 575                 goto sriov_cfg_exit;
 576
 577         bnxt_sriov_enable(bp, &num_vfs);
 578
 579 sriov_cfg_exit:
 580         bp->sriov_cfg = false;
 581         wake_up(&bp->sriov_cfg_wait);
 582
 583         return num_vfs;
 584 }
 585
 586 static int bnxt_hwrm_fwd_resp(struct bnxt *bp, struct bnxt_vf_info *vf,
 587                               void *encap_resp, __le64 encap_resp_addr,
 588                               __le16 encap_resp_cpr, u32 msg_size)
 589 {
 590         int rc = 0;
 591         struct hwrm_fwd_resp_input req = {0};
 592         struct hwrm_fwd_resp_output *resp = bp->hwrm_cmd_resp_addr;
 593
 594         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FWD_RESP, -1, -1);
 595
 596         /* Set the new target id */
 597         req.target_id = cpu_to_le16(vf->fw_fid);
 598         req.encap_resp_len = cpu_to_le16(msg_size);
 599         req.encap_resp_addr = encap_resp_addr;
 600         req.encap_resp_cmpl_ring = encap_resp_cpr;
 601         memcpy(req.encap_resp, encap_resp, msg_size);
 602
 603         mutex_lock(&bp->hwrm_cmd_lock);
 604         rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 605
 606         if (rc) {
 607                 netdev_err(bp->dev, "hwrm_fwd_resp failed. rc:%d\n", rc);
 608                 goto fwd_resp_exit;
 609         }
 610
 611         if (resp->error_code) {
 612                 netdev_err(bp->dev, "hwrm_fwd_resp error %d\n",
 613                            resp->error_code);
 614                 rc = -1;
 615         }
 616
 617 fwd_resp_exit:
 618         mutex_unlock(&bp->hwrm_cmd_lock);
 619         return rc;
 620 }
 621
 622 static int bnxt_hwrm_fwd_err_resp(struct bnxt *bp, struct bnxt_vf_info *vf,
 623                                   u32 msg_size)
 624 {
 625         int rc = 0;
 626         struct hwrm_reject_fwd_resp_input req = {0};
 627         struct hwrm_reject_fwd_resp_output *resp = bp->hwrm_cmd_resp_addr;
 628
 629         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_REJECT_FWD_RESP, -1, -1);
 630         /* Set the new target id */
 631         req.target_id = cpu_to_le16(vf->fw_fid);
 632         memcpy(req.encap_request, vf->hwrm_cmd_req_addr, msg_size);
 633
 634         mutex_lock(&bp->hwrm_cmd_lock);
 635         rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 636
 637         if (rc) {
 638                 netdev_err(bp->dev, "hwrm_fwd_err_resp failed. rc:%d\n", rc);
 639                 goto fwd_err_resp_exit;
 640         }
 641
 642         if (resp->error_code) {
 643                 netdev_err(bp->dev, "hwrm_fwd_err_resp error %d\n",
 644                            resp->error_code);
 645                 rc = -1;
 646         }
 647
 648 fwd_err_resp_exit:
 649         mutex_unlock(&bp->hwrm_cmd_lock);
 650         return rc;
 651 }
 652
 653 static int bnxt_hwrm_exec_fwd_resp(struct bnxt *bp, struct bnxt_vf_info *vf,
 654                                    u32 msg_size)
 655 {
 656         int rc = 0;
 657         struct hwrm_exec_fwd_resp_input req = {0};
 658         struct hwrm_exec_fwd_resp_output *resp = bp->hwrm_cmd_resp_addr;
 659
 660         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_EXEC_FWD_RESP, -1, -1);
 661         /* Set the new target id */
 662         req.target_id = cpu_to_le16(vf->fw_fid);
 663         memcpy(req.encap_request, vf->hwrm_cmd_req_addr, msg_size);
 664
 665         mutex_lock(&bp->hwrm_cmd_lock);
 666         rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 667
 668         if (rc) {
 669                 netdev_err(bp->dev, "hwrm_exec_fw_resp failed. rc:%d\n", rc);
 670                 goto exec_fwd_resp_exit;
 671         }
 672
 673         if (resp->error_code) {
 674                 netdev_err(bp->dev, "hwrm_exec_fw_resp error %d\n",
 675                            resp->error_code);
 676                 rc = -1;
 677         }
 678
 679 exec_fwd_resp_exit:
 680         mutex_unlock(&bp->hwrm_cmd_lock);
 681         return rc;
 682 }
 683
 684 static int bnxt_vf_validate_set_mac(struct bnxt *bp, struct bnxt_vf_info *vf)
 685 {
 686         u32 msg_size = sizeof(struct hwrm_cfa_l2_filter_alloc_input);
 687         struct hwrm_cfa_l2_filter_alloc_input *req =
 688                 (struct hwrm_cfa_l2_filter_alloc_input *)vf->hwrm_cmd_req_addr;
 689
 690         if (!is_valid_ether_addr(vf->mac_addr) ||
 691             ether_addr_equal((const u8 *)req->l2_addr, vf->mac_addr))
 692                 return bnxt_hwrm_exec_fwd_resp(bp, vf, msg_size);
 693         else
 694                 return bnxt_hwrm_fwd_err_resp(bp, vf, msg_size);
 695 }
 696
 697 static int bnxt_vf_set_link(struct bnxt *bp, struct bnxt_vf_info *vf)
 698 {
 699         int rc = 0;
 700
 701         if (!(vf->flags & BNXT_VF_LINK_FORCED)) {
 702                 /* real link */
 703                 rc = bnxt_hwrm_exec_fwd_resp(
 704                         bp, vf, sizeof(struct hwrm_port_phy_qcfg_input));
 705         } else {
 706                 struct hwrm_port_phy_qcfg_output phy_qcfg_resp;
 707                 struct hwrm_port_phy_qcfg_input *phy_qcfg_req;
 708
 709                 phy_qcfg_req =
 710                 (struct hwrm_port_phy_qcfg_input *)vf->hwrm_cmd_req_addr;
 711                 mutex_lock(&bp->hwrm_cmd_lock);
 712                 memcpy(&phy_qcfg_resp, &bp->link_info.phy_qcfg_resp,
 713                        sizeof(phy_qcfg_resp));
 714                 mutex_unlock(&bp->hwrm_cmd_lock);
 715                 phy_qcfg_resp.seq_id = phy_qcfg_req->seq_id;
 716
 717                 if (vf->flags & BNXT_VF_LINK_UP) {
 718                         /* if physical link is down, force link up on VF */
 719                         if (phy_qcfg_resp.link ==
 720                             PORT_PHY_QCFG_RESP_LINK_NO_LINK) {
 721                                 phy_qcfg_resp.link =
 722                                         PORT_PHY_QCFG_RESP_LINK_LINK;
 723                                 if (phy_qcfg_resp.auto_link_speed)
 724                                         phy_qcfg_resp.link_speed =
 725                                                 phy_qcfg_resp.auto_link_speed;
 726                                 else
 727                                         phy_qcfg_resp.link_speed =
 728                                                 phy_qcfg_resp.force_link_speed;
 729                                 phy_qcfg_resp.duplex =
 730                                         PORT_PHY_QCFG_RESP_DUPLEX_FULL;
 731                                 phy_qcfg_resp.pause =
 732                                         (PORT_PHY_QCFG_RESP_PAUSE_TX |
 733                                          PORT_PHY_QCFG_RESP_PAUSE_RX);
 734                         }
 735                 } else {
 736                         /* force link down */
 737                         phy_qcfg_resp.link = PORT_PHY_QCFG_RESP_LINK_NO_LINK;
 738                         phy_qcfg_resp.link_speed = 0;
 739                         phy_qcfg_resp.duplex = PORT_PHY_QCFG_RESP_DUPLEX_HALF;
 740                         phy_qcfg_resp.pause = 0;
 741                 }
 742                 rc = bnxt_hwrm_fwd_resp(bp, vf, &phy_qcfg_resp,
 743                                         phy_qcfg_req->resp_addr,
 744                                         phy_qcfg_req->cmpl_ring,
 745                                         sizeof(phy_qcfg_resp));
 746         }
 747         return rc;
 748 }
 749
 750 static int bnxt_vf_req_validate_snd(struct bnxt *bp, struct bnxt_vf_info *vf)
 751 {
 752         int rc = 0;
 753         struct hwrm_cmd_req_hdr *encap_req = vf->hwrm_cmd_req_addr;
 754         u32 req_type = le32_to_cpu(encap_req->cmpl_ring_req_type) & 0xffff;
 755
 756         switch (req_type) {
 757         case HWRM_CFA_L2_FILTER_ALLOC:
 758                 rc = bnxt_vf_validate_set_mac(bp, vf);
 759                 break;
 760         case HWRM_FUNC_CFG:
 761                 /* TODO Validate if VF is allowed to change mac address,
 762                  * mtu, num of rings etc
 763                  */
 764                 rc = bnxt_hwrm_exec_fwd_resp(
 765                         bp, vf, sizeof(struct hwrm_func_cfg_input));
 766                 break;
 767         case HWRM_PORT_PHY_QCFG:
 768                 rc = bnxt_vf_set_link(bp, vf);
 769                 break;
 770         default:
 771                 break;
 772         }
 773         return rc;
 774 }
 775
 776 void bnxt_hwrm_exec_fwd_req(struct bnxt *bp)
 777 {
 778         u32 i = 0, active_vfs = bp->pf.active_vfs, vf_id;
 779
 780         /* Scan through VF's and process commands */
 781         while (1) {
 782                 vf_id = find_next_bit(bp->pf.vf_event_bmap, active_vfs, i);
 783                 if (vf_id >= active_vfs)
 784                         break;
 785
 786                 clear_bit(vf_id, bp->pf.vf_event_bmap);
 787                 bnxt_vf_req_validate_snd(bp, &bp->pf.vf[vf_id]);
 788                 i = vf_id + 1;
 789         }
 790 }
 791
 792 void bnxt_update_vf_mac(struct bnxt *bp)
 793 {
 794         struct hwrm_func_qcaps_input req = {0};
 795         struct hwrm_func_qcaps_output *resp = bp->hwrm_cmd_resp_addr;
 796
 797         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_QCAPS, -1, -1);
 798         req.fid = cpu_to_le16(0xffff);
 799
 800         mutex_lock(&bp->hwrm_cmd_lock);
 801         if (_hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT))
 802                 goto update_vf_mac_exit;
 803
 804         if (!is_valid_ether_addr(resp->perm_mac_address))
 805                 goto update_vf_mac_exit;
 806
 807         if (ether_addr_equal(resp->perm_mac_address, bp->vf.mac_addr))
 808                 goto update_vf_mac_exit;
 809
 810         memcpy(bp->vf.mac_addr, resp->perm_mac_address, ETH_ALEN);
 811         memcpy(bp->dev->dev_addr, bp->vf.mac_addr, ETH_ALEN);
 812 update_vf_mac_exit:
 813         mutex_unlock(&bp->hwrm_cmd_lock);
 814 }
 815
 816 #else
 817
 818 void bnxt_sriov_disable(struct bnxt *bp)
 819 {
 820 }
 821
 822 void bnxt_hwrm_exec_fwd_req(struct bnxt *bp)
 823 {
 824         netdev_err(bp->dev, "Invalid VF message received when SRIOV is not enable\n");
 825 }
 826
 827 void bnxt_update_vf_mac(struct bnxt *bp)
 828 {
 829 }
 830 #endif