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

   1 /* Broadcom NetXtreme-C/E network driver.
   2  *
   3  * Copyright (c) 2014-2016 Broadcom Corporation
   4  * Copyright (c) 2016-2017 Broadcom Limited
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/pci.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/if_vlan.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/etherdevice.h>
  17 #include "bnxt_hsi.h"
  18 #include "bnxt.h"
  19 #include "bnxt_ulp.h"
  20 #include "bnxt_sriov.h"
  21 #include "bnxt_vfr.h"
  22 #include "bnxt_ethtool.h"
  23
  24 #ifdef CONFIG_BNXT_SRIOV
  25 static int bnxt_hwrm_fwd_async_event_cmpl(struct bnxt *bp,
  26                                           struct bnxt_vf_info *vf, u16 event_id)
  27 {
  28         struct hwrm_fwd_async_event_cmpl_output *resp = bp->hwrm_cmd_resp_addr;
  29         struct hwrm_fwd_async_event_cmpl_input req = {0};
  30         struct hwrm_async_event_cmpl *async_cmpl;
  31         int rc = 0;
  32
  33         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FWD_ASYNC_EVENT_CMPL, -1, -1);
  34         if (vf)
  35                 req.encap_async_event_target_id = cpu_to_le16(vf->fw_fid);
  36         else
  37                 /* broadcast this async event to all VFs */
  38                 req.encap_async_event_target_id = cpu_to_le16(0xffff);
  39         async_cmpl = (struct hwrm_async_event_cmpl *)req.encap_async_event_cmpl;
  40         async_cmpl->type = cpu_to_le16(ASYNC_EVENT_CMPL_TYPE_HWRM_ASYNC_EVENT);
  41         async_cmpl->event_id = cpu_to_le16(event_id);
  42
  43         mutex_lock(&bp->hwrm_cmd_lock);
  44         rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
  45
  46         if (rc) {
  47                 netdev_err(bp->dev, "hwrm_fwd_async_event_cmpl failed. rc:%d\n",
  48                            rc);
  49                 goto fwd_async_event_cmpl_exit;
  50         }
  51
  52         if (resp->error_code) {
  53                 netdev_err(bp->dev, "hwrm_fwd_async_event_cmpl error %d\n",
  54                            resp->error_code);
  55                 rc = -1;
  56         }
  57
  58 fwd_async_event_cmpl_exit:
  59         mutex_unlock(&bp->hwrm_cmd_lock);
  60         return rc;
  61 }
  62
  63 static int bnxt_vf_ndo_prep(struct bnxt *bp, int vf_id)
  64 {
  65         if (!test_bit(BNXT_STATE_OPEN, &bp->state)) {
  66                 netdev_err(bp->dev, "vf ndo called though PF is down\n");
  67                 return -EINVAL;
  68         }
  69         if (!bp->pf.active_vfs) {
  70                 netdev_err(bp->dev, "vf ndo called though sriov is disabled\n");
  71                 return -EINVAL;
  72         }
  73         if (vf_id >= bp->pf.max_vfs) {
  74                 netdev_err(bp->dev, "Invalid VF id %d\n", vf_id);
  75                 return -EINVAL;
  76         }
  77         return 0;
  78 }
  79
  80 int bnxt_set_vf_spoofchk(struct net_device *dev, int vf_id, bool setting)
  81 {
  82         struct hwrm_func_cfg_input req = {0};
  83         struct bnxt *bp = netdev_priv(dev);
  84         struct bnxt_vf_info *vf;
  85         bool old_setting = false;
  86         u32 func_flags;
  87         int rc;
  88
  89         if (bp->hwrm_spec_code < 0x10701)
  90                 return -ENOTSUPP;
  91
  92         rc = bnxt_vf_ndo_prep(bp, vf_id);
  93         if (rc)
  94                 return rc;
  95
  96         vf = &bp->pf.vf[vf_id];
  97         if (vf->flags & BNXT_VF_SPOOFCHK)
  98                 old_setting = true;
  99         if (old_setting == setting)
 100                 return 0;
 101
 102         func_flags = vf->func_flags;
 103         if (setting)
 104                 func_flags |= FUNC_CFG_REQ_FLAGS_SRC_MAC_ADDR_CHECK_ENABLE;
 105         else
 106                 func_flags |= FUNC_CFG_REQ_FLAGS_SRC_MAC_ADDR_CHECK_DISABLE;
 107         /*TODO: if the driver supports VLAN filter on guest VLAN,
 108          * the spoof check should also include vlan anti-spoofing
 109          */
 110         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_CFG, -1, -1);
 111         req.fid = cpu_to_le16(vf->fw_fid);
 112         req.flags = cpu_to_le32(func_flags);
 113         rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 114         if (!rc) {
 115                 vf->func_flags = func_flags;
 116                 if (setting)
 117                         vf->flags |= BNXT_VF_SPOOFCHK;
 118                 else
 119                         vf->flags &= ~BNXT_VF_SPOOFCHK;
 120         }
 121         return rc;
 122 }
 123
 124 int bnxt_get_vf_config(struct net_device *dev, int vf_id,
 125                        struct ifla_vf_info *ivi)
 126 {
 127         struct bnxt *bp = netdev_priv(dev);
 128         struct bnxt_vf_info *vf;
 129         int rc;
 130
 131         rc = bnxt_vf_ndo_prep(bp, vf_id);
 132         if (rc)
 133                 return rc;
 134
 135         ivi->vf = vf_id;
 136         vf = &bp->pf.vf[vf_id];
 137
 138         memcpy(&ivi->mac, vf->mac_addr, ETH_ALEN);
 139         ivi->max_tx_rate = vf->max_tx_rate;
 140         ivi->min_tx_rate = vf->min_tx_rate;
 141         ivi->vlan = vf->vlan;
 142         if (vf->flags & BNXT_VF_QOS)
 143                 ivi->qos = vf->vlan >> VLAN_PRIO_SHIFT;
 144         else
 145                 ivi->qos = 0;
 146         ivi->spoofchk = !!(vf->flags & BNXT_VF_SPOOFCHK);
 147         if (!(vf->flags & BNXT_VF_LINK_FORCED))
 148                 ivi->linkstate = IFLA_VF_LINK_STATE_AUTO;
 149         else if (vf->flags & BNXT_VF_LINK_UP)
 150                 ivi->linkstate = IFLA_VF_LINK_STATE_ENABLE;
 151         else
 152                 ivi->linkstate = IFLA_VF_LINK_STATE_DISABLE;
 153
 154         return 0;
 155 }
 156
 157 int bnxt_set_vf_mac(struct net_device *dev, int vf_id, u8 *mac)
 158 {
 159         struct hwrm_func_cfg_input req = {0};
 160         struct bnxt *bp = netdev_priv(dev);
 161         struct bnxt_vf_info *vf;
 162         int rc;
 163
 164         rc = bnxt_vf_ndo_prep(bp, vf_id);
 165         if (rc)
 166                 return rc;
 167         /* reject bc or mc mac addr, zero mac addr means allow
 168          * VF to use its own mac addr
 169          */
 170         if (is_multicast_ether_addr(mac)) {
 171                 netdev_err(dev, "Invalid VF ethernet address\n");
 172                 return -EINVAL;
 173         }
 174         vf = &bp->pf.vf[vf_id];
 175
 176         memcpy(vf->mac_addr, mac, ETH_ALEN);
 177         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_CFG, -1, -1);
 178         req.fid = cpu_to_le16(vf->fw_fid);
 179         req.flags = cpu_to_le32(vf->func_flags);
 180         req.enables = cpu_to_le32(FUNC_CFG_REQ_ENABLES_DFLT_MAC_ADDR);
 181         memcpy(req.dflt_mac_addr, mac, ETH_ALEN);
 182         return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 183 }
 184
 185 int bnxt_set_vf_vlan(struct net_device *dev, int vf_id, u16 vlan_id, u8 qos,
 186                      __be16 vlan_proto)
 187 {
 188         struct hwrm_func_cfg_input req = {0};
 189         struct bnxt *bp = netdev_priv(dev);
 190         struct bnxt_vf_info *vf;
 191         u16 vlan_tag;
 192         int rc;
 193
 194         if (bp->hwrm_spec_code < 0x10201)
 195                 return -ENOTSUPP;
 196
 197         if (vlan_proto != htons(ETH_P_8021Q))
 198                 return -EPROTONOSUPPORT;
 199
 200         rc = bnxt_vf_ndo_prep(bp, vf_id);
 201         if (rc)
 202                 return rc;
 203
 204         /* TODO: needed to implement proper handling of user priority,
 205          * currently fail the command if there is valid priority
 206          */
 207         if (vlan_id > 4095 || qos)
 208                 return -EINVAL;
 209
 210         vf = &bp->pf.vf[vf_id];
 211         vlan_tag = vlan_id;
 212         if (vlan_tag == vf->vlan)
 213                 return 0;
 214
 215         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_CFG, -1, -1);
 216         req.fid = cpu_to_le16(vf->fw_fid);
 217         req.flags = cpu_to_le32(vf->func_flags);
 218         req.dflt_vlan = cpu_to_le16(vlan_tag);
 219         req.enables = cpu_to_le32(FUNC_CFG_REQ_ENABLES_DFLT_VLAN);
 220         rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 221         if (!rc)
 222                 vf->vlan = vlan_tag;
 223         return rc;
 224 }
 225
 226 int bnxt_set_vf_bw(struct net_device *dev, int vf_id, int min_tx_rate,
 227                    int max_tx_rate)
 228 {
 229         struct hwrm_func_cfg_input req = {0};
 230         struct bnxt *bp = netdev_priv(dev);
 231         struct bnxt_vf_info *vf;
 232         u32 pf_link_speed;
 233         int rc;
 234
 235         rc = bnxt_vf_ndo_prep(bp, vf_id);
 236         if (rc)
 237                 return rc;
 238
 239         vf = &bp->pf.vf[vf_id];
 240         pf_link_speed = bnxt_fw_to_ethtool_speed(bp->link_info.link_speed);
 241         if (max_tx_rate > pf_link_speed) {
 242                 netdev_info(bp->dev, "max tx rate %d exceed PF link speed for VF %d\n",
 243                             max_tx_rate, vf_id);
 244                 return -EINVAL;
 245         }
 246
 247         if (min_tx_rate > pf_link_speed || min_tx_rate > max_tx_rate) {
 248                 netdev_info(bp->dev, "min tx rate %d is invalid for VF %d\n",
 249                             min_tx_rate, vf_id);
 250                 return -EINVAL;
 251         }
 252         if (min_tx_rate == vf->min_tx_rate && max_tx_rate == vf->max_tx_rate)
 253                 return 0;
 254         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_CFG, -1, -1);
 255         req.fid = cpu_to_le16(vf->fw_fid);
 256         req.flags = cpu_to_le32(vf->func_flags);
 257         req.enables = cpu_to_le32(FUNC_CFG_REQ_ENABLES_MAX_BW);
 258         req.max_bw = cpu_to_le32(max_tx_rate);
 259         req.enables |= cpu_to_le32(FUNC_CFG_REQ_ENABLES_MIN_BW);
 260         req.min_bw = cpu_to_le32(min_tx_rate);
 261         rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 262         if (!rc) {
 263                 vf->min_tx_rate = min_tx_rate;
 264                 vf->max_tx_rate = max_tx_rate;
 265         }
 266         return rc;
 267 }
 268
 269 int bnxt_set_vf_link_state(struct net_device *dev, int vf_id, int link)
 270 {
 271         struct bnxt *bp = netdev_priv(dev);
 272         struct bnxt_vf_info *vf;
 273         int rc;
 274
 275         rc = bnxt_vf_ndo_prep(bp, vf_id);
 276         if (rc)
 277                 return rc;
 278
 279         vf = &bp->pf.vf[vf_id];
 280
 281         vf->flags &= ~(BNXT_VF_LINK_UP | BNXT_VF_LINK_FORCED);
 282         switch (link) {
 283         case IFLA_VF_LINK_STATE_AUTO:
 284                 vf->flags |= BNXT_VF_LINK_UP;
 285                 break;
 286         case IFLA_VF_LINK_STATE_DISABLE:
 287                 vf->flags |= BNXT_VF_LINK_FORCED;
 288                 break;
 289         case IFLA_VF_LINK_STATE_ENABLE:
 290                 vf->flags |= BNXT_VF_LINK_UP | BNXT_VF_LINK_FORCED;
 291                 break;
 292         default:
 293                 netdev_err(bp->dev, "Invalid link option\n");
 294                 rc = -EINVAL;
 295                 break;
 296         }
 297         if (vf->flags & (BNXT_VF_LINK_UP | BNXT_VF_LINK_FORCED))
 298                 rc = bnxt_hwrm_fwd_async_event_cmpl(bp, vf,
 299                         ASYNC_EVENT_CMPL_EVENT_ID_LINK_STATUS_CHANGE);
 300         return rc;
 301 }
 302
 303 static int bnxt_set_vf_attr(struct bnxt *bp, int num_vfs)
 304 {
 305         int i;
 306         struct bnxt_vf_info *vf;
 307
 308         for (i = 0; i < num_vfs; i++) {
 309                 vf = &bp->pf.vf[i];
 310                 memset(vf, 0, sizeof(*vf));
 311         }
 312         return 0;
 313 }
 314
 315 static int bnxt_hwrm_func_vf_resource_free(struct bnxt *bp, int num_vfs)
 316 {
 317         int i, rc = 0;
 318         struct bnxt_pf_info *pf = &bp->pf;
 319         struct hwrm_func_vf_resc_free_input req = {0};
 320
 321         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_VF_RESC_FREE, -1, -1);
 322
 323         mutex_lock(&bp->hwrm_cmd_lock);
 324         for (i = pf->first_vf_id; i < pf->first_vf_id + num_vfs; i++) {
 325                 req.vf_id = cpu_to_le16(i);
 326                 rc = _hwrm_send_message(bp, &req, sizeof(req),
 327                                         HWRM_CMD_TIMEOUT);
 328                 if (rc)
 329                         break;
 330         }
 331         mutex_unlock(&bp->hwrm_cmd_lock);
 332         return rc;
 333 }
 334
 335 static void bnxt_free_vf_resources(struct bnxt *bp)
 336 {
 337         struct pci_dev *pdev = bp->pdev;
 338         int i;
 339
 340         kfree(bp->pf.vf_event_bmap);
 341         bp->pf.vf_event_bmap = NULL;
 342
 343         for (i = 0; i < 4; i++) {
 344                 if (bp->pf.hwrm_cmd_req_addr[i]) {
 345                         dma_free_coherent(&pdev->dev, BNXT_PAGE_SIZE,
 346                                           bp->pf.hwrm_cmd_req_addr[i],
 347                                           bp->pf.hwrm_cmd_req_dma_addr[i]);
 348                         bp->pf.hwrm_cmd_req_addr[i] = NULL;
 349                 }
 350         }
 351
 352         kfree(bp->pf.vf);
 353         bp->pf.vf = NULL;
 354 }
 355
 356 static int bnxt_alloc_vf_resources(struct bnxt *bp, int num_vfs)
 357 {
 358         struct pci_dev *pdev = bp->pdev;
 359         u32 nr_pages, size, i, j, k = 0;
 360
 361         bp->pf.vf = kcalloc(num_vfs, sizeof(struct bnxt_vf_info), GFP_KERNEL);
 362         if (!bp->pf.vf)
 363                 return -ENOMEM;
 364
 365         bnxt_set_vf_attr(bp, num_vfs);
 366
 367         size = num_vfs * BNXT_HWRM_REQ_MAX_SIZE;
 368         nr_pages = size / BNXT_PAGE_SIZE;
 369         if (size & (BNXT_PAGE_SIZE - 1))
 370                 nr_pages++;
 371
 372         for (i = 0; i < nr_pages; i++) {
 373                 bp->pf.hwrm_cmd_req_addr[i] =
 374                         dma_alloc_coherent(&pdev->dev, BNXT_PAGE_SIZE,
 375                                            &bp->pf.hwrm_cmd_req_dma_addr[i],
 376                                            GFP_KERNEL);
 377
 378                 if (!bp->pf.hwrm_cmd_req_addr[i])
 379                         return -ENOMEM;
 380
 381                 for (j = 0; j < BNXT_HWRM_REQS_PER_PAGE && k < num_vfs; j++) {
 382                         struct bnxt_vf_info *vf = &bp->pf.vf[k];
 383
 384                         vf->hwrm_cmd_req_addr = bp->pf.hwrm_cmd_req_addr[i] +
 385                                                 j * BNXT_HWRM_REQ_MAX_SIZE;
 386                         vf->hwrm_cmd_req_dma_addr =
 387                                 bp->pf.hwrm_cmd_req_dma_addr[i] + j *
 388                                 BNXT_HWRM_REQ_MAX_SIZE;
 389                         k++;
 390                 }
 391         }
 392
 393         /* Max 128 VF's */
 394         bp->pf.vf_event_bmap = kzalloc(16, GFP_KERNEL);
 395         if (!bp->pf.vf_event_bmap)
 396                 return -ENOMEM;
 397
 398         bp->pf.hwrm_cmd_req_pages = nr_pages;
 399         return 0;
 400 }
 401
 402 static int bnxt_hwrm_func_buf_rgtr(struct bnxt *bp)
 403 {
 404         struct hwrm_func_buf_rgtr_input req = {0};
 405
 406         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_BUF_RGTR, -1, -1);
 407
 408         req.req_buf_num_pages = cpu_to_le16(bp->pf.hwrm_cmd_req_pages);
 409         req.req_buf_page_size = cpu_to_le16(BNXT_PAGE_SHIFT);
 410         req.req_buf_len = cpu_to_le16(BNXT_HWRM_REQ_MAX_SIZE);
 411         req.req_buf_page_addr0 = cpu_to_le64(bp->pf.hwrm_cmd_req_dma_addr[0]);
 412         req.req_buf_page_addr1 = cpu_to_le64(bp->pf.hwrm_cmd_req_dma_addr[1]);
 413         req.req_buf_page_addr2 = cpu_to_le64(bp->pf.hwrm_cmd_req_dma_addr[2]);
 414         req.req_buf_page_addr3 = cpu_to_le64(bp->pf.hwrm_cmd_req_dma_addr[3]);
 415
 416         return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 417 }
 418
 419 /* only call by PF to reserve resources for VF */
 420 static int bnxt_hwrm_func_cfg(struct bnxt *bp, int num_vfs)
 421 {
 422         u32 rc = 0, mtu, i;
 423         u16 vf_tx_rings, vf_rx_rings, vf_cp_rings, vf_stat_ctx, vf_vnics;
 424         u16 vf_ring_grps;
 425         struct hwrm_func_cfg_input req = {0};
 426         struct bnxt_pf_info *pf = &bp->pf;
 427         int total_vf_tx_rings = 0;
 428
 429         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_CFG, -1, -1);
 430
 431         /* Remaining rings are distributed equally amongs VF's for now */
 432         vf_cp_rings = (pf->max_cp_rings - bp->cp_nr_rings) / num_vfs;
 433         vf_stat_ctx = (pf->max_stat_ctxs - bp->num_stat_ctxs) / num_vfs;
 434         if (bp->flags & BNXT_FLAG_AGG_RINGS)
 435                 vf_rx_rings = (pf->max_rx_rings - bp->rx_nr_rings * 2) /
 436                               num_vfs;
 437         else
 438                 vf_rx_rings = (pf->max_rx_rings - bp->rx_nr_rings) / num_vfs;
 439         vf_ring_grps = (bp->pf.max_hw_ring_grps - bp->rx_nr_rings) / num_vfs;
 440         vf_tx_rings = (pf->max_tx_rings - bp->tx_nr_rings) / num_vfs;
 441         vf_vnics = (pf->max_vnics - bp->nr_vnics) / num_vfs;
 442         vf_vnics = min_t(u16, vf_vnics, vf_rx_rings);
 443
 444         req.enables = cpu_to_le32(FUNC_CFG_REQ_ENABLES_MTU |
 445                                   FUNC_CFG_REQ_ENABLES_MRU |
 446                                   FUNC_CFG_REQ_ENABLES_NUM_RSSCOS_CTXS |
 447                                   FUNC_CFG_REQ_ENABLES_NUM_STAT_CTXS |
 448                                   FUNC_CFG_REQ_ENABLES_NUM_CMPL_RINGS |
 449                                   FUNC_CFG_REQ_ENABLES_NUM_TX_RINGS |
 450                                   FUNC_CFG_REQ_ENABLES_NUM_RX_RINGS |
 451                                   FUNC_CFG_REQ_ENABLES_NUM_L2_CTXS |
 452                                   FUNC_CFG_REQ_ENABLES_NUM_VNICS |
 453                                   FUNC_CFG_REQ_ENABLES_NUM_HW_RING_GRPS);
 454
 455         mtu = bp->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 456         req.mru = cpu_to_le16(mtu);
 457         req.mtu = cpu_to_le16(mtu);
 458
 459         req.num_rsscos_ctxs = cpu_to_le16(1);
 460         req.num_cmpl_rings = cpu_to_le16(vf_cp_rings);
 461         req.num_tx_rings = cpu_to_le16(vf_tx_rings);
 462         req.num_rx_rings = cpu_to_le16(vf_rx_rings);
 463         req.num_hw_ring_grps = cpu_to_le16(vf_ring_grps);
 464         req.num_l2_ctxs = cpu_to_le16(4);
 465
 466         req.num_vnics = cpu_to_le16(vf_vnics);
 467         /* FIXME spec currently uses 1 bit for stats ctx */
 468         req.num_stat_ctxs = cpu_to_le16(vf_stat_ctx);
 469
 470         mutex_lock(&bp->hwrm_cmd_lock);
 471         for (i = 0; i < num_vfs; i++) {
 472                 int vf_tx_rsvd = vf_tx_rings;
 473
 474                 req.fid = cpu_to_le16(pf->first_vf_id + i);
 475                 rc = _hwrm_send_message(bp, &req, sizeof(req),
 476                                         HWRM_CMD_TIMEOUT);
 477                 if (rc)
 478                         break;
 479                 pf->active_vfs = i + 1;
 480                 pf->vf[i].fw_fid = le16_to_cpu(req.fid);
 481                 rc = __bnxt_hwrm_get_tx_rings(bp, pf->vf[i].fw_fid,
 482                                               &vf_tx_rsvd);
 483                 if (rc)
 484                         break;
 485                 total_vf_tx_rings += vf_tx_rsvd;
 486         }
 487         mutex_unlock(&bp->hwrm_cmd_lock);
 488         if (!rc) {
 489                 pf->max_tx_rings -= total_vf_tx_rings;
 490                 pf->max_rx_rings -= vf_rx_rings * num_vfs;
 491                 pf->max_hw_ring_grps -= vf_ring_grps * num_vfs;
 492                 pf->max_cp_rings -= vf_cp_rings * num_vfs;
 493                 pf->max_rsscos_ctxs -= num_vfs;
 494                 pf->max_stat_ctxs -= vf_stat_ctx * num_vfs;
 495                 pf->max_vnics -= vf_vnics * num_vfs;
 496         }
 497         return rc;
 498 }
 499
 500 static int bnxt_sriov_enable(struct bnxt *bp, int *num_vfs)
 501 {
 502         int rc = 0, vfs_supported;
 503         int min_rx_rings, min_tx_rings, min_rss_ctxs;
 504         int tx_ok = 0, rx_ok = 0, rss_ok = 0;
 505         int avail_cp, avail_stat;
 506
 507         /* Check if we can enable requested num of vf's. At a mininum
 508          * we require 1 RX 1 TX rings for each VF. In this minimum conf
 509          * features like TPA will not be available.
 510          */
 511         vfs_supported = *num_vfs;
 512
 513         avail_cp = bp->pf.max_cp_rings - bp->cp_nr_rings;
 514         avail_stat = bp->pf.max_stat_ctxs - bp->num_stat_ctxs;
 515         avail_cp = min_t(int, avail_cp, avail_stat);
 516
 517         while (vfs_supported) {
 518                 min_rx_rings = vfs_supported;
 519                 min_tx_rings = vfs_supported;
 520                 min_rss_ctxs = vfs_supported;
 521
 522                 if (bp->flags & BNXT_FLAG_AGG_RINGS) {
 523                         if (bp->pf.max_rx_rings - bp->rx_nr_rings * 2 >=
 524                             min_rx_rings)
 525                                 rx_ok = 1;
 526                 } else {
 527                         if (bp->pf.max_rx_rings - bp->rx_nr_rings >=
 528                             min_rx_rings)
 529                                 rx_ok = 1;
 530                 }
 531                 if (bp->pf.max_vnics - bp->nr_vnics < min_rx_rings ||
 532                     avail_cp < min_rx_rings)
 533                         rx_ok = 0;
 534
 535                 if (bp->pf.max_tx_rings - bp->tx_nr_rings >= min_tx_rings &&
 536                     avail_cp >= min_tx_rings)
 537                         tx_ok = 1;
 538
 539                 if (bp->pf.max_rsscos_ctxs - bp->rsscos_nr_ctxs >= min_rss_ctxs)
 540                         rss_ok = 1;
 541
 542                 if (tx_ok && rx_ok && rss_ok)
 543                         break;
 544
 545                 vfs_supported--;
 546         }
 547
 548         if (!vfs_supported) {
 549                 netdev_err(bp->dev, "Cannot enable VF's as all resources are used by PF\n");
 550                 return -EINVAL;
 551         }
 552
 553         if (vfs_supported != *num_vfs) {
 554                 netdev_info(bp->dev, "Requested VFs %d, can enable %d\n",
 555                             *num_vfs, vfs_supported);
 556                 *num_vfs = vfs_supported;
 557         }
 558
 559         rc = bnxt_alloc_vf_resources(bp, *num_vfs);
 560         if (rc)
 561                 goto err_out1;
 562
 563         /* Reserve resources for VFs */
 564         rc = bnxt_hwrm_func_cfg(bp, *num_vfs);
 565         if (rc)
 566                 goto err_out2;
 567
 568         /* Register buffers for VFs */
 569         rc = bnxt_hwrm_func_buf_rgtr(bp);
 570         if (rc)
 571                 goto err_out2;
 572
 573         bnxt_ulp_sriov_cfg(bp, *num_vfs);
 574
 575         rc = pci_enable_sriov(bp->pdev, *num_vfs);
 576         if (rc)
 577                 goto err_out2;
 578
 579         return 0;
 580
 581 err_out2:
 582         /* Free the resources reserved for various VF's */
 583         bnxt_hwrm_func_vf_resource_free(bp, *num_vfs);
 584
 585 err_out1:
 586         bnxt_free_vf_resources(bp);
 587
 588         return rc;
 589 }
 590
 591 void bnxt_sriov_disable(struct bnxt *bp)
 592 {
 593         u16 num_vfs = pci_num_vf(bp->pdev);
 594
 595         if (!num_vfs)
 596                 return;
 597
 598         /* synchronize VF and VF-rep create and destroy */
 599         mutex_lock(&bp->sriov_lock);
 600         bnxt_vf_reps_destroy(bp);
 601
 602         if (pci_vfs_assigned(bp->pdev)) {
 603                 bnxt_hwrm_fwd_async_event_cmpl(
 604                         bp, NULL, ASYNC_EVENT_CMPL_EVENT_ID_PF_DRVR_UNLOAD);
 605                 netdev_warn(bp->dev, "Unable to free %d VFs because some are assigned to VMs.\n",
 606                             num_vfs);
 607         } else {
 608                 pci_disable_sriov(bp->pdev);
 609                 /* Free the HW resources reserved for various VF's */
 610                 bnxt_hwrm_func_vf_resource_free(bp, num_vfs);
 611         }
 612         mutex_unlock(&bp->sriov_lock);
 613
 614         bnxt_free_vf_resources(bp);
 615
 616         bp->pf.active_vfs = 0;
 617         /* Reclaim all resources for the PF. */
 618         rtnl_lock();
 619         bnxt_restore_pf_fw_resources(bp);
 620         rtnl_unlock();
 621
 622         bnxt_ulp_sriov_cfg(bp, 0);
 623 }
 624
 625 int bnxt_sriov_configure(struct pci_dev *pdev, int num_vfs)
 626 {
 627         struct net_device *dev = pci_get_drvdata(pdev);
 628         struct bnxt *bp = netdev_priv(dev);
 629
 630         if (!(bp->flags & BNXT_FLAG_USING_MSIX)) {
 631                 netdev_warn(dev, "Not allow SRIOV if the irq mode is not MSIX\n");
 632                 return 0;
 633         }
 634
 635         rtnl_lock();
 636         if (!netif_running(dev)) {
 637                 netdev_warn(dev, "Reject SRIOV config request since if is down!\n");
 638                 rtnl_unlock();
 639                 return 0;
 640         }
 641         bp->sriov_cfg = true;
 642         rtnl_unlock();
 643
 644         if (pci_vfs_assigned(bp->pdev)) {
 645                 netdev_warn(dev, "Unable to configure SRIOV since some VFs are assigned to VMs.\n");
 646                 num_vfs = 0;
 647                 goto sriov_cfg_exit;
 648         }
 649
 650         /* Check if enabled VFs is same as requested */
 651         if (num_vfs && num_vfs == bp->pf.active_vfs)
 652                 goto sriov_cfg_exit;
 653
 654         /* if there are previous existing VFs, clean them up */
 655         bnxt_sriov_disable(bp);
 656         if (!num_vfs)
 657                 goto sriov_cfg_exit;
 658
 659         bnxt_sriov_enable(bp, &num_vfs);
 660
 661 sriov_cfg_exit:
 662         bp->sriov_cfg = false;
 663         wake_up(&bp->sriov_cfg_wait);
 664
 665         return num_vfs;
 666 }
 667
 668 static int bnxt_hwrm_fwd_resp(struct bnxt *bp, struct bnxt_vf_info *vf,
 669                               void *encap_resp, __le64 encap_resp_addr,
 670                               __le16 encap_resp_cpr, u32 msg_size)
 671 {
 672         int rc = 0;
 673         struct hwrm_fwd_resp_input req = {0};
 674         struct hwrm_fwd_resp_output *resp = bp->hwrm_cmd_resp_addr;
 675
 676         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FWD_RESP, -1, -1);
 677
 678         /* Set the new target id */
 679         req.target_id = cpu_to_le16(vf->fw_fid);
 680         req.encap_resp_target_id = cpu_to_le16(vf->fw_fid);
 681         req.encap_resp_len = cpu_to_le16(msg_size);
 682         req.encap_resp_addr = encap_resp_addr;
 683         req.encap_resp_cmpl_ring = encap_resp_cpr;
 684         memcpy(req.encap_resp, encap_resp, msg_size);
 685
 686         mutex_lock(&bp->hwrm_cmd_lock);
 687         rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 688
 689         if (rc) {
 690                 netdev_err(bp->dev, "hwrm_fwd_resp failed. rc:%d\n", rc);
 691                 goto fwd_resp_exit;
 692         }
 693
 694         if (resp->error_code) {
 695                 netdev_err(bp->dev, "hwrm_fwd_resp error %d\n",
 696                            resp->error_code);
 697                 rc = -1;
 698         }
 699
 700 fwd_resp_exit:
 701         mutex_unlock(&bp->hwrm_cmd_lock);
 702         return rc;
 703 }
 704
 705 static int bnxt_hwrm_fwd_err_resp(struct bnxt *bp, struct bnxt_vf_info *vf,
 706                                   u32 msg_size)
 707 {
 708         int rc = 0;
 709         struct hwrm_reject_fwd_resp_input req = {0};
 710         struct hwrm_reject_fwd_resp_output *resp = bp->hwrm_cmd_resp_addr;
 711
 712         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_REJECT_FWD_RESP, -1, -1);
 713         /* Set the new target id */
 714         req.target_id = cpu_to_le16(vf->fw_fid);
 715         req.encap_resp_target_id = cpu_to_le16(vf->fw_fid);
 716         memcpy(req.encap_request, vf->hwrm_cmd_req_addr, msg_size);
 717
 718         mutex_lock(&bp->hwrm_cmd_lock);
 719         rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 720
 721         if (rc) {
 722                 netdev_err(bp->dev, "hwrm_fwd_err_resp failed. rc:%d\n", rc);
 723                 goto fwd_err_resp_exit;
 724         }
 725
 726         if (resp->error_code) {
 727                 netdev_err(bp->dev, "hwrm_fwd_err_resp error %d\n",
 728                            resp->error_code);
 729                 rc = -1;
 730         }
 731
 732 fwd_err_resp_exit:
 733         mutex_unlock(&bp->hwrm_cmd_lock);
 734         return rc;
 735 }
 736
 737 static int bnxt_hwrm_exec_fwd_resp(struct bnxt *bp, struct bnxt_vf_info *vf,
 738                                    u32 msg_size)
 739 {
 740         int rc = 0;
 741         struct hwrm_exec_fwd_resp_input req = {0};
 742         struct hwrm_exec_fwd_resp_output *resp = bp->hwrm_cmd_resp_addr;
 743
 744         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_EXEC_FWD_RESP, -1, -1);
 745         /* Set the new target id */
 746         req.target_id = cpu_to_le16(vf->fw_fid);
 747         req.encap_resp_target_id = cpu_to_le16(vf->fw_fid);
 748         memcpy(req.encap_request, vf->hwrm_cmd_req_addr, msg_size);
 749
 750         mutex_lock(&bp->hwrm_cmd_lock);
 751         rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 752
 753         if (rc) {
 754                 netdev_err(bp->dev, "hwrm_exec_fw_resp failed. rc:%d\n", rc);
 755                 goto exec_fwd_resp_exit;
 756         }
 757
 758         if (resp->error_code) {
 759                 netdev_err(bp->dev, "hwrm_exec_fw_resp error %d\n",
 760                            resp->error_code);
 761                 rc = -1;
 762         }
 763
 764 exec_fwd_resp_exit:
 765         mutex_unlock(&bp->hwrm_cmd_lock);
 766         return rc;
 767 }
 768
 769 static int bnxt_vf_validate_set_mac(struct bnxt *bp, struct bnxt_vf_info *vf)
 770 {
 771         u32 msg_size = sizeof(struct hwrm_cfa_l2_filter_alloc_input);
 772         struct hwrm_cfa_l2_filter_alloc_input *req =
 773                 (struct hwrm_cfa_l2_filter_alloc_input *)vf->hwrm_cmd_req_addr;
 774
 775         if (!is_valid_ether_addr(vf->mac_addr) ||
 776             ether_addr_equal((const u8 *)req->l2_addr, vf->mac_addr))
 777                 return bnxt_hwrm_exec_fwd_resp(bp, vf, msg_size);
 778         else
 779                 return bnxt_hwrm_fwd_err_resp(bp, vf, msg_size);
 780 }
 781
 782 static int bnxt_vf_set_link(struct bnxt *bp, struct bnxt_vf_info *vf)
 783 {
 784         int rc = 0;
 785
 786         if (!(vf->flags & BNXT_VF_LINK_FORCED)) {
 787                 /* real link */
 788                 rc = bnxt_hwrm_exec_fwd_resp(
 789                         bp, vf, sizeof(struct hwrm_port_phy_qcfg_input));
 790         } else {
 791                 struct hwrm_port_phy_qcfg_output phy_qcfg_resp;
 792                 struct hwrm_port_phy_qcfg_input *phy_qcfg_req;
 793
 794                 phy_qcfg_req =
 795                 (struct hwrm_port_phy_qcfg_input *)vf->hwrm_cmd_req_addr;
 796                 mutex_lock(&bp->hwrm_cmd_lock);
 797                 memcpy(&phy_qcfg_resp, &bp->link_info.phy_qcfg_resp,
 798                        sizeof(phy_qcfg_resp));
 799                 mutex_unlock(&bp->hwrm_cmd_lock);
 800                 phy_qcfg_resp.seq_id = phy_qcfg_req->seq_id;
 801
 802                 if (vf->flags & BNXT_VF_LINK_UP) {
 803                         /* if physical link is down, force link up on VF */
 804                         if (phy_qcfg_resp.link !=
 805                             PORT_PHY_QCFG_RESP_LINK_LINK) {
 806                                 phy_qcfg_resp.link =
 807                                         PORT_PHY_QCFG_RESP_LINK_LINK;
 808                                 phy_qcfg_resp.link_speed = cpu_to_le16(
 809                                         PORT_PHY_QCFG_RESP_LINK_SPEED_10GB);
 810                                 phy_qcfg_resp.duplex_cfg =
 811                                         PORT_PHY_QCFG_RESP_DUPLEX_CFG_FULL;
 812                                 phy_qcfg_resp.duplex_state =
 813                                         PORT_PHY_QCFG_RESP_DUPLEX_STATE_FULL;
 814                                 phy_qcfg_resp.pause =
 815                                         (PORT_PHY_QCFG_RESP_PAUSE_TX |
 816                                          PORT_PHY_QCFG_RESP_PAUSE_RX);
 817                         }
 818                 } else {
 819                         /* force link down */
 820                         phy_qcfg_resp.link = PORT_PHY_QCFG_RESP_LINK_NO_LINK;
 821                         phy_qcfg_resp.link_speed = 0;
 822                         phy_qcfg_resp.duplex_state =
 823                                 PORT_PHY_QCFG_RESP_DUPLEX_STATE_HALF;
 824                         phy_qcfg_resp.pause = 0;
 825                 }
 826                 rc = bnxt_hwrm_fwd_resp(bp, vf, &phy_qcfg_resp,
 827                                         phy_qcfg_req->resp_addr,
 828                                         phy_qcfg_req->cmpl_ring,
 829                                         sizeof(phy_qcfg_resp));
 830         }
 831         return rc;
 832 }
 833
 834 static int bnxt_vf_req_validate_snd(struct bnxt *bp, struct bnxt_vf_info *vf)
 835 {
 836         int rc = 0;
 837         struct input *encap_req = vf->hwrm_cmd_req_addr;
 838         u32 req_type = le16_to_cpu(encap_req->req_type);
 839
 840         switch (req_type) {
 841         case HWRM_CFA_L2_FILTER_ALLOC:
 842                 rc = bnxt_vf_validate_set_mac(bp, vf);
 843                 break;
 844         case HWRM_FUNC_CFG:
 845                 /* TODO Validate if VF is allowed to change mac address,
 846                  * mtu, num of rings etc
 847                  */
 848                 rc = bnxt_hwrm_exec_fwd_resp(
 849                         bp, vf, sizeof(struct hwrm_func_cfg_input));
 850                 break;
 851         case HWRM_PORT_PHY_QCFG:
 852                 rc = bnxt_vf_set_link(bp, vf);
 853                 break;
 854         default:
 855                 break;
 856         }
 857         return rc;
 858 }
 859
 860 void bnxt_hwrm_exec_fwd_req(struct bnxt *bp)
 861 {
 862         u32 i = 0, active_vfs = bp->pf.active_vfs, vf_id;
 863
 864         /* Scan through VF's and process commands */
 865         while (1) {
 866                 vf_id = find_next_bit(bp->pf.vf_event_bmap, active_vfs, i);
 867                 if (vf_id >= active_vfs)
 868                         break;
 869
 870                 clear_bit(vf_id, bp->pf.vf_event_bmap);
 871                 bnxt_vf_req_validate_snd(bp, &bp->pf.vf[vf_id]);
 872                 i = vf_id + 1;
 873         }
 874 }
 875
 876 void bnxt_update_vf_mac(struct bnxt *bp)
 877 {
 878         struct hwrm_func_qcaps_input req = {0};
 879         struct hwrm_func_qcaps_output *resp = bp->hwrm_cmd_resp_addr;
 880
 881         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_QCAPS, -1, -1);
 882         req.fid = cpu_to_le16(0xffff);
 883
 884         mutex_lock(&bp->hwrm_cmd_lock);
 885         if (_hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT))
 886                 goto update_vf_mac_exit;
 887
 888         /* Store MAC address from the firmware.  There are 2 cases:
 889          * 1. MAC address is valid.  It is assigned from the PF and we
 890          *    need to override the current VF MAC address with it.
 891          * 2. MAC address is zero.  The VF will use a random MAC address by
 892          *    default but the stored zero MAC will allow the VF user to change
 893          *    the random MAC address using ndo_set_mac_address() if he wants.
 894          */
 895         if (!ether_addr_equal(resp->mac_address, bp->vf.mac_addr))
 896                 memcpy(bp->vf.mac_addr, resp->mac_address, ETH_ALEN);
 897
 898         /* overwrite netdev dev_addr with admin VF MAC */
 899         if (is_valid_ether_addr(bp->vf.mac_addr))
 900                 memcpy(bp->dev->dev_addr, bp->vf.mac_addr, ETH_ALEN);
 901 update_vf_mac_exit:
 902         mutex_unlock(&bp->hwrm_cmd_lock);
 903 }
 904
 905 int bnxt_approve_mac(struct bnxt *bp, u8 *mac)
 906 {
 907         struct hwrm_func_vf_cfg_input req = {0};
 908         int rc = 0;
 909
 910         if (!BNXT_VF(bp))
 911                 return 0;
 912
 913         if (bp->hwrm_spec_code < 0x10202) {
 914                 if (is_valid_ether_addr(bp->vf.mac_addr))
 915                         rc = -EADDRNOTAVAIL;
 916                 goto mac_done;
 917         }
 918         bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_VF_CFG, -1, -1);
 919         req.enables = cpu_to_le32(FUNC_VF_CFG_REQ_ENABLES_DFLT_MAC_ADDR);
 920         memcpy(req.dflt_mac_addr, mac, ETH_ALEN);
 921         rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 922 mac_done:
 923         if (rc) {
 924                 rc = -EADDRNOTAVAIL;
 925                 netdev_warn(bp->dev, "VF MAC address %pM not approved by the PF\n",
 926                             mac);
 927         }
 928         return rc;
 929 }
 930 #else
 931
 932 void bnxt_sriov_disable(struct bnxt *bp)
 933 {
 934 }
 935
 936 void bnxt_hwrm_exec_fwd_req(struct bnxt *bp)
 937 {
 938         netdev_err(bp->dev, "Invalid VF message received when SRIOV is not enable\n");
 939 }
 940
 941 void bnxt_update_vf_mac(struct bnxt *bp)
 942 {
 943 }
 944
 945 int bnxt_approve_mac(struct bnxt *bp, u8 *mac)
 946 {
 947         return 0;
 948 }
 949 #endif