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

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