drivers/infiniband/hw/hfi1/vnic

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This source file includes following definitions.
setup_vnic_ctxt
allocate_vnic_ctxt
deallocate_vnic_ctxt
hfi1_vnic_setup
hfi1_vnic_cleanup
hfi1_vnic_update_stats
update_len_counters
hfi1_vnic_update_tx_counters
hfi1_vnic_update_rx_counters
hfi1_vnic_get_stats64
create_bypass_pbc
hfi1_vnic_maybe_stop_tx
hfi1_netdev_start_xmit
hfi1_vnic_select_queue
hfi1_vnic_decap_skb
hfi1_vnic_get_skb
hfi1_vnic_handle_rx
hfi1_vnic_napi
hfi1_vnic_bypass_rcv
hfi1_vnic_up
hfi1_vnic_down
hfi1_netdev_open
hfi1_netdev_close
hfi1_vnic_allot_ctxt
hfi1_vnic_init
hfi1_vnic_deinit
hfi1_vnic_set_vesw_id
hfi1_vnic_free_rn
hfi1_vnic_alloc_rn
   1 /*
   2  * Copyright(c) 2017 - 2018 Intel Corporation.
   3  *
   4  * This file is provided under a dual BSD/GPLv2 license.  When using or
   5  * redistributing this file, you may do so under either license.
   6  *
   7  * GPL LICENSE SUMMARY
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of version 2 of the GNU General Public License as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * BSD LICENSE
  19  *
  20  * Redistribution and use in source and binary forms, with or without
  21  * modification, are permitted provided that the following conditions
  22  * are met:
  23  *
  24  *  - Redistributions of source code must retain the above copyright
  25  *    notice, this list of conditions and the following disclaimer.
  26  *  - Redistributions in binary form must reproduce the above copyright
  27  *    notice, this list of conditions and the following disclaimer in
  28  *    the documentation and/or other materials provided with the
  29  *    distribution.
  30  *  - Neither the name of Intel Corporation nor the names of its
  31  *    contributors may be used to endorse or promote products derived
  32  *    from this software without specific prior written permission.
  33  *
  34  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  35  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  36  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  37  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  38  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  39  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  40  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  41  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  42  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  43  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  44  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  45  *
  46  */
  47 
  48 /*
  49  * This file contains HFI1 support for VNIC functionality
  50  */
  51 
  52 #include <linux/io.h>
  53 #include <linux/if_vlan.h>
  54 
  55 #include "vnic.h"
  56 
  57 #define HFI_TX_TIMEOUT_MS 1000
  58 
  59 #define HFI1_VNIC_RCV_Q_SIZE   1024
  60 
  61 #define HFI1_VNIC_UP 0
  62 
  63 static DEFINE_SPINLOCK(vport_cntr_lock);
  64 
  65 static int setup_vnic_ctxt(struct hfi1_devdata *dd, struct hfi1_ctxtdata *uctxt)
  66 {
  67         unsigned int rcvctrl_ops = 0;
  68         int ret;
  69 
  70         uctxt->do_interrupt = &handle_receive_interrupt;
  71 
  72         /* Now allocate the RcvHdr queue and eager buffers. */
  73         ret = hfi1_create_rcvhdrq(dd, uctxt);
  74         if (ret)
  75                 goto done;
  76 
  77         ret = hfi1_setup_eagerbufs(uctxt);
  78         if (ret)
  79                 goto done;
  80 
  81         if (uctxt->rcvhdrtail_kvaddr)
  82                 clear_rcvhdrtail(uctxt);
  83 
  84         rcvctrl_ops = HFI1_RCVCTRL_CTXT_ENB;
  85         rcvctrl_ops |= HFI1_RCVCTRL_INTRAVAIL_ENB;
  86 
  87         if (!HFI1_CAP_KGET_MASK(uctxt->flags, MULTI_PKT_EGR))
  88                 rcvctrl_ops |= HFI1_RCVCTRL_ONE_PKT_EGR_ENB;
  89         if (HFI1_CAP_KGET_MASK(uctxt->flags, NODROP_EGR_FULL))
  90                 rcvctrl_ops |= HFI1_RCVCTRL_NO_EGR_DROP_ENB;
  91         if (HFI1_CAP_KGET_MASK(uctxt->flags, NODROP_RHQ_FULL))
  92                 rcvctrl_ops |= HFI1_RCVCTRL_NO_RHQ_DROP_ENB;
  93         if (HFI1_CAP_KGET_MASK(uctxt->flags, DMA_RTAIL))
  94                 rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_ENB;
  95 
  96         hfi1_rcvctrl(uctxt->dd, rcvctrl_ops, uctxt);
  97 done:
  98         return ret;
  99 }
 100 
 101 static int allocate_vnic_ctxt(struct hfi1_devdata *dd,
 102                               struct hfi1_ctxtdata **vnic_ctxt)
 103 {
 104         struct hfi1_ctxtdata *uctxt;
 105         int ret;
 106 
 107         if (dd->flags & HFI1_FROZEN)
 108                 return -EIO;
 109 
 110         ret = hfi1_create_ctxtdata(dd->pport, dd->node, &uctxt);
 111         if (ret < 0) {
 112                 dd_dev_err(dd, "Unable to create ctxtdata, failing open\n");
 113                 return -ENOMEM;
 114         }
 115 
 116         uctxt->flags = HFI1_CAP_KGET(MULTI_PKT_EGR) |
 117                         HFI1_CAP_KGET(NODROP_RHQ_FULL) |
 118                         HFI1_CAP_KGET(NODROP_EGR_FULL) |
 119                         HFI1_CAP_KGET(DMA_RTAIL);
 120         uctxt->seq_cnt = 1;
 121         uctxt->is_vnic = true;
 122 
 123         msix_request_rcd_irq(uctxt);
 124 
 125         hfi1_stats.sps_ctxts++;
 126         dd_dev_dbg(dd, "created vnic context %d\n", uctxt->ctxt);
 127         *vnic_ctxt = uctxt;
 128 
 129         return 0;
 130 }
 131 
 132 static void deallocate_vnic_ctxt(struct hfi1_devdata *dd,
 133                                  struct hfi1_ctxtdata *uctxt)
 134 {
 135         dd_dev_dbg(dd, "closing vnic context %d\n", uctxt->ctxt);
 136         flush_wc();
 137 
 138         /*
 139          * Disable receive context and interrupt available, reset all
 140          * RcvCtxtCtrl bits to default values.
 141          */
 142         hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_DIS |
 143                      HFI1_RCVCTRL_TIDFLOW_DIS |
 144                      HFI1_RCVCTRL_INTRAVAIL_DIS |
 145                      HFI1_RCVCTRL_ONE_PKT_EGR_DIS |
 146                      HFI1_RCVCTRL_NO_RHQ_DROP_DIS |
 147                      HFI1_RCVCTRL_NO_EGR_DROP_DIS, uctxt);
 148 
 149         /* msix_intr will always be > 0, only clean up if this is true */
 150         if (uctxt->msix_intr)
 151                 msix_free_irq(dd, uctxt->msix_intr);
 152 
 153         uctxt->event_flags = 0;
 154 
 155         hfi1_clear_tids(uctxt);
 156         hfi1_clear_ctxt_pkey(dd, uctxt);
 157 
 158         hfi1_stats.sps_ctxts--;
 159 
 160         hfi1_free_ctxt(uctxt);
 161 }
 162 
 163 void hfi1_vnic_setup(struct hfi1_devdata *dd)
 164 {
 165         xa_init(&dd->vnic.vesws);
 166 }
 167 
 168 void hfi1_vnic_cleanup(struct hfi1_devdata *dd)
 169 {
 170         WARN_ON(!xa_empty(&dd->vnic.vesws));
 171 }
 172 
 173 #define SUM_GRP_COUNTERS(stats, qstats, x_grp) do {            \
 174                 u64 *src64, *dst64;                            \
 175                 for (src64 = &qstats->x_grp.unicast,           \
 176                         dst64 = &stats->x_grp.unicast;         \
 177                         dst64 <= &stats->x_grp.s_1519_max;) {  \
 178                         *dst64++ += *src64++;                  \
 179                 }                                              \
 180         } while (0)
 181 
 182 /* hfi1_vnic_update_stats - update statistics */
 183 static void hfi1_vnic_update_stats(struct hfi1_vnic_vport_info *vinfo,
 184                                    struct opa_vnic_stats *stats)
 185 {
 186         struct net_device *netdev = vinfo->netdev;
 187         u8 i;
 188 
 189         /* add tx counters on different queues */
 190         for (i = 0; i < vinfo->num_tx_q; i++) {
 191                 struct opa_vnic_stats *qstats = &vinfo->stats[i];
 192                 struct rtnl_link_stats64 *qnstats = &vinfo->stats[i].netstats;
 193 
 194                 stats->netstats.tx_fifo_errors += qnstats->tx_fifo_errors;
 195                 stats->netstats.tx_carrier_errors += qnstats->tx_carrier_errors;
 196                 stats->tx_drop_state += qstats->tx_drop_state;
 197                 stats->tx_dlid_zero += qstats->tx_dlid_zero;
 198 
 199                 SUM_GRP_COUNTERS(stats, qstats, tx_grp);
 200                 stats->netstats.tx_packets += qnstats->tx_packets;
 201                 stats->netstats.tx_bytes += qnstats->tx_bytes;
 202         }
 203 
 204         /* add rx counters on different queues */
 205         for (i = 0; i < vinfo->num_rx_q; i++) {
 206                 struct opa_vnic_stats *qstats = &vinfo->stats[i];
 207                 struct rtnl_link_stats64 *qnstats = &vinfo->stats[i].netstats;
 208 
 209                 stats->netstats.rx_fifo_errors += qnstats->rx_fifo_errors;
 210                 stats->netstats.rx_nohandler += qnstats->rx_nohandler;
 211                 stats->rx_drop_state += qstats->rx_drop_state;
 212                 stats->rx_oversize += qstats->rx_oversize;
 213                 stats->rx_runt += qstats->rx_runt;
 214 
 215                 SUM_GRP_COUNTERS(stats, qstats, rx_grp);
 216                 stats->netstats.rx_packets += qnstats->rx_packets;
 217                 stats->netstats.rx_bytes += qnstats->rx_bytes;
 218         }
 219 
 220         stats->netstats.tx_errors = stats->netstats.tx_fifo_errors +
 221                                     stats->netstats.tx_carrier_errors +
 222                                     stats->tx_drop_state + stats->tx_dlid_zero;
 223         stats->netstats.tx_dropped = stats->netstats.tx_errors;
 224 
 225         stats->netstats.rx_errors = stats->netstats.rx_fifo_errors +
 226                                     stats->netstats.rx_nohandler +
 227                                     stats->rx_drop_state + stats->rx_oversize +
 228                                     stats->rx_runt;
 229         stats->netstats.rx_dropped = stats->netstats.rx_errors;
 230 
 231         netdev->stats.tx_packets = stats->netstats.tx_packets;
 232         netdev->stats.tx_bytes = stats->netstats.tx_bytes;
 233         netdev->stats.tx_fifo_errors = stats->netstats.tx_fifo_errors;
 234         netdev->stats.tx_carrier_errors = stats->netstats.tx_carrier_errors;
 235         netdev->stats.tx_errors = stats->netstats.tx_errors;
 236         netdev->stats.tx_dropped = stats->netstats.tx_dropped;
 237 
 238         netdev->stats.rx_packets = stats->netstats.rx_packets;
 239         netdev->stats.rx_bytes = stats->netstats.rx_bytes;
 240         netdev->stats.rx_fifo_errors = stats->netstats.rx_fifo_errors;
 241         netdev->stats.multicast = stats->rx_grp.mcastbcast;
 242         netdev->stats.rx_length_errors = stats->rx_oversize + stats->rx_runt;
 243         netdev->stats.rx_errors = stats->netstats.rx_errors;
 244         netdev->stats.rx_dropped = stats->netstats.rx_dropped;
 245 }
 246 
 247 /* update_len_counters - update pkt's len histogram counters */
 248 static inline void update_len_counters(struct opa_vnic_grp_stats *grp,
 249                                        int len)
 250 {
 251         /* account for 4 byte FCS */
 252         if (len >= 1515)
 253                 grp->s_1519_max++;
 254         else if (len >= 1020)
 255                 grp->s_1024_1518++;
 256         else if (len >= 508)
 257                 grp->s_512_1023++;
 258         else if (len >= 252)
 259                 grp->s_256_511++;
 260         else if (len >= 124)
 261                 grp->s_128_255++;
 262         else if (len >= 61)
 263                 grp->s_65_127++;
 264         else
 265                 grp->s_64++;
 266 }
 267 
 268 /* hfi1_vnic_update_tx_counters - update transmit counters */
 269 static void hfi1_vnic_update_tx_counters(struct hfi1_vnic_vport_info *vinfo,
 270                                          u8 q_idx, struct sk_buff *skb, int err)
 271 {
 272         struct ethhdr *mac_hdr = (struct ethhdr *)skb_mac_header(skb);
 273         struct opa_vnic_stats *stats = &vinfo->stats[q_idx];
 274         struct opa_vnic_grp_stats *tx_grp = &stats->tx_grp;
 275         u16 vlan_tci;
 276 
 277         stats->netstats.tx_packets++;
 278         stats->netstats.tx_bytes += skb->len + ETH_FCS_LEN;
 279 
 280         update_len_counters(tx_grp, skb->len);
 281 
 282         /* rest of the counts are for good packets only */
 283         if (unlikely(err))
 284                 return;
 285 
 286         if (is_multicast_ether_addr(mac_hdr->h_dest))
 287                 tx_grp->mcastbcast++;
 288         else
 289                 tx_grp->unicast++;
 290 
 291         if (!__vlan_get_tag(skb, &vlan_tci))
 292                 tx_grp->vlan++;
 293         else
 294                 tx_grp->untagged++;
 295 }
 296 
 297 /* hfi1_vnic_update_rx_counters - update receive counters */
 298 static void hfi1_vnic_update_rx_counters(struct hfi1_vnic_vport_info *vinfo,
 299                                          u8 q_idx, struct sk_buff *skb, int err)
 300 {
 301         struct ethhdr *mac_hdr = (struct ethhdr *)skb->data;
 302         struct opa_vnic_stats *stats = &vinfo->stats[q_idx];
 303         struct opa_vnic_grp_stats *rx_grp = &stats->rx_grp;
 304         u16 vlan_tci;
 305 
 306         stats->netstats.rx_packets++;
 307         stats->netstats.rx_bytes += skb->len + ETH_FCS_LEN;
 308 
 309         update_len_counters(rx_grp, skb->len);
 310 
 311         /* rest of the counts are for good packets only */
 312         if (unlikely(err))
 313                 return;
 314 
 315         if (is_multicast_ether_addr(mac_hdr->h_dest))
 316                 rx_grp->mcastbcast++;
 317         else
 318                 rx_grp->unicast++;
 319 
 320         if (!__vlan_get_tag(skb, &vlan_tci))
 321                 rx_grp->vlan++;
 322         else
 323                 rx_grp->untagged++;
 324 }
 325 
 326 /* This function is overloaded for opa_vnic specific implementation */
 327 static void hfi1_vnic_get_stats64(struct net_device *netdev,
 328                                   struct rtnl_link_stats64 *stats)
 329 {
 330         struct opa_vnic_stats *vstats = (struct opa_vnic_stats *)stats;
 331         struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
 332 
 333         hfi1_vnic_update_stats(vinfo, vstats);
 334 }
 335 
 336 static u64 create_bypass_pbc(u32 vl, u32 dw_len)
 337 {
 338         u64 pbc;
 339 
 340         pbc = ((u64)PBC_IHCRC_NONE << PBC_INSERT_HCRC_SHIFT)
 341                 | PBC_INSERT_BYPASS_ICRC | PBC_CREDIT_RETURN
 342                 | PBC_PACKET_BYPASS
 343                 | ((vl & PBC_VL_MASK) << PBC_VL_SHIFT)
 344                 | (dw_len & PBC_LENGTH_DWS_MASK) << PBC_LENGTH_DWS_SHIFT;
 345 
 346         return pbc;
 347 }
 348 
 349 /* hfi1_vnic_maybe_stop_tx - stop tx queue if required */
 350 static void hfi1_vnic_maybe_stop_tx(struct hfi1_vnic_vport_info *vinfo,
 351                                     u8 q_idx)
 352 {
 353         netif_stop_subqueue(vinfo->netdev, q_idx);
 354         if (!hfi1_vnic_sdma_write_avail(vinfo, q_idx))
 355                 return;
 356 
 357         netif_start_subqueue(vinfo->netdev, q_idx);
 358 }
 359 
 360 static netdev_tx_t hfi1_netdev_start_xmit(struct sk_buff *skb,
 361                                           struct net_device *netdev)
 362 {
 363         struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
 364         u8 pad_len, q_idx = skb->queue_mapping;
 365         struct hfi1_devdata *dd = vinfo->dd;
 366         struct opa_vnic_skb_mdata *mdata;
 367         u32 pkt_len, total_len;
 368         int err = -EINVAL;
 369         u64 pbc;
 370 
 371         v_dbg("xmit: queue %d skb len %d\n", q_idx, skb->len);
 372         if (unlikely(!netif_oper_up(netdev))) {
 373                 vinfo->stats[q_idx].tx_drop_state++;
 374                 goto tx_finish;
 375         }
 376 
 377         /* take out meta data */
 378         mdata = (struct opa_vnic_skb_mdata *)skb->data;
 379         skb_pull(skb, sizeof(*mdata));
 380         if (unlikely(mdata->flags & OPA_VNIC_SKB_MDATA_ENCAP_ERR)) {
 381                 vinfo->stats[q_idx].tx_dlid_zero++;
 382                 goto tx_finish;
 383         }
 384 
 385         /* add tail padding (for 8 bytes size alignment) and icrc */
 386         pad_len = -(skb->len + OPA_VNIC_ICRC_TAIL_LEN) & 0x7;
 387         pad_len += OPA_VNIC_ICRC_TAIL_LEN;
 388 
 389         /*
 390          * pkt_len is how much data we have to write, includes header and data.
 391          * total_len is length of the packet in Dwords plus the PBC should not
 392          * include the CRC.
 393          */
 394         pkt_len = (skb->len + pad_len) >> 2;
 395         total_len = pkt_len + 2; /* PBC + packet */
 396 
 397         pbc = create_bypass_pbc(mdata->vl, total_len);
 398 
 399         skb_get(skb);
 400         v_dbg("pbc 0x%016llX len %d pad_len %d\n", pbc, skb->len, pad_len);
 401         err = dd->process_vnic_dma_send(dd, q_idx, vinfo, skb, pbc, pad_len);
 402         if (unlikely(err)) {
 403                 if (err == -ENOMEM)
 404                         vinfo->stats[q_idx].netstats.tx_fifo_errors++;
 405                 else if (err != -EBUSY)
 406                         vinfo->stats[q_idx].netstats.tx_carrier_errors++;
 407         }
 408         /* remove the header before updating tx counters */
 409         skb_pull(skb, OPA_VNIC_HDR_LEN);
 410 
 411         if (unlikely(err == -EBUSY)) {
 412                 hfi1_vnic_maybe_stop_tx(vinfo, q_idx);
 413                 dev_kfree_skb_any(skb);
 414                 return NETDEV_TX_BUSY;
 415         }
 416 
 417 tx_finish:
 418         /* update tx counters */
 419         hfi1_vnic_update_tx_counters(vinfo, q_idx, skb, err);
 420         dev_kfree_skb_any(skb);
 421         return NETDEV_TX_OK;
 422 }
 423 
 424 static u16 hfi1_vnic_select_queue(struct net_device *netdev,
 425                                   struct sk_buff *skb,
 426                                   struct net_device *sb_dev)
 427 {
 428         struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
 429         struct opa_vnic_skb_mdata *mdata;
 430         struct sdma_engine *sde;
 431 
 432         mdata = (struct opa_vnic_skb_mdata *)skb->data;
 433         sde = sdma_select_engine_vl(vinfo->dd, mdata->entropy, mdata->vl);
 434         return sde->this_idx;
 435 }
 436 
 437 /* hfi1_vnic_decap_skb - strip OPA header from the skb (ethernet) packet */
 438 static inline int hfi1_vnic_decap_skb(struct hfi1_vnic_rx_queue *rxq,
 439                                       struct sk_buff *skb)
 440 {
 441         struct hfi1_vnic_vport_info *vinfo = rxq->vinfo;
 442         int max_len = vinfo->netdev->mtu + VLAN_ETH_HLEN;
 443         int rc = -EFAULT;
 444 
 445         skb_pull(skb, OPA_VNIC_HDR_LEN);
 446 
 447         /* Validate Packet length */
 448         if (unlikely(skb->len > max_len))
 449                 vinfo->stats[rxq->idx].rx_oversize++;
 450         else if (unlikely(skb->len < ETH_ZLEN))
 451                 vinfo->stats[rxq->idx].rx_runt++;
 452         else
 453                 rc = 0;
 454         return rc;
 455 }
 456 
 457 static inline struct sk_buff *hfi1_vnic_get_skb(struct hfi1_vnic_rx_queue *rxq)
 458 {
 459         unsigned char *pad_info;
 460         struct sk_buff *skb;
 461 
 462         skb = skb_dequeue(&rxq->skbq);
 463         if (unlikely(!skb))
 464                 return NULL;
 465 
 466         /* remove tail padding and icrc */
 467         pad_info = skb->data + skb->len - 1;
 468         skb_trim(skb, (skb->len - OPA_VNIC_ICRC_TAIL_LEN -
 469                        ((*pad_info) & 0x7)));
 470 
 471         return skb;
 472 }
 473 
 474 /* hfi1_vnic_handle_rx - handle skb receive */
 475 static void hfi1_vnic_handle_rx(struct hfi1_vnic_rx_queue *rxq,
 476                                 int *work_done, int work_to_do)
 477 {
 478         struct hfi1_vnic_vport_info *vinfo = rxq->vinfo;
 479         struct sk_buff *skb;
 480         int rc;
 481 
 482         while (1) {
 483                 if (*work_done >= work_to_do)
 484                         break;
 485 
 486                 skb = hfi1_vnic_get_skb(rxq);
 487                 if (unlikely(!skb))
 488                         break;
 489 
 490                 rc = hfi1_vnic_decap_skb(rxq, skb);
 491                 /* update rx counters */
 492                 hfi1_vnic_update_rx_counters(vinfo, rxq->idx, skb, rc);
 493                 if (unlikely(rc)) {
 494                         dev_kfree_skb_any(skb);
 495                         continue;
 496                 }
 497 
 498                 skb_checksum_none_assert(skb);
 499                 skb->protocol = eth_type_trans(skb, rxq->netdev);
 500 
 501                 napi_gro_receive(&rxq->napi, skb);
 502                 (*work_done)++;
 503         }
 504 }
 505 
 506 /* hfi1_vnic_napi - napi receive polling callback function */
 507 static int hfi1_vnic_napi(struct napi_struct *napi, int budget)
 508 {
 509         struct hfi1_vnic_rx_queue *rxq = container_of(napi,
 510                                               struct hfi1_vnic_rx_queue, napi);
 511         struct hfi1_vnic_vport_info *vinfo = rxq->vinfo;
 512         int work_done = 0;
 513 
 514         v_dbg("napi %d budget %d\n", rxq->idx, budget);
 515         hfi1_vnic_handle_rx(rxq, &work_done, budget);
 516 
 517         v_dbg("napi %d work_done %d\n", rxq->idx, work_done);
 518         if (work_done < budget)
 519                 napi_complete(napi);
 520 
 521         return work_done;
 522 }
 523 
 524 void hfi1_vnic_bypass_rcv(struct hfi1_packet *packet)
 525 {
 526         struct hfi1_devdata *dd = packet->rcd->dd;
 527         struct hfi1_vnic_vport_info *vinfo = NULL;
 528         struct hfi1_vnic_rx_queue *rxq;
 529         struct sk_buff *skb;
 530         int l4_type, vesw_id = -1;
 531         u8 q_idx;
 532 
 533         l4_type = hfi1_16B_get_l4(packet->ebuf);
 534         if (likely(l4_type == OPA_16B_L4_ETHR)) {
 535                 vesw_id = HFI1_VNIC_GET_VESWID(packet->ebuf);
 536                 vinfo = xa_load(&dd->vnic.vesws, vesw_id);
 537 
 538                 /*
 539                  * In case of invalid vesw id, count the error on
 540                  * the first available vport.
 541                  */
 542                 if (unlikely(!vinfo)) {
 543                         struct hfi1_vnic_vport_info *vinfo_tmp;
 544                         unsigned long index = 0;
 545 
 546                         vinfo_tmp = xa_find(&dd->vnic.vesws, &index, ULONG_MAX,
 547                                         XA_PRESENT);
 548                         if (vinfo_tmp) {
 549                                 spin_lock(&vport_cntr_lock);
 550                                 vinfo_tmp->stats[0].netstats.rx_nohandler++;
 551                                 spin_unlock(&vport_cntr_lock);
 552                         }
 553                 }
 554         }
 555 
 556         if (unlikely(!vinfo)) {
 557                 dd_dev_warn(dd, "vnic rcv err: l4 %d vesw id %d ctx %d\n",
 558                             l4_type, vesw_id, packet->rcd->ctxt);
 559                 return;
 560         }
 561 
 562         q_idx = packet->rcd->vnic_q_idx;
 563         rxq = &vinfo->rxq[q_idx];
 564         if (unlikely(!netif_oper_up(vinfo->netdev))) {
 565                 vinfo->stats[q_idx].rx_drop_state++;
 566                 skb_queue_purge(&rxq->skbq);
 567                 return;
 568         }
 569 
 570         if (unlikely(skb_queue_len(&rxq->skbq) > HFI1_VNIC_RCV_Q_SIZE)) {
 571                 vinfo->stats[q_idx].netstats.rx_fifo_errors++;
 572                 return;
 573         }
 574 
 575         skb = netdev_alloc_skb(vinfo->netdev, packet->tlen);
 576         if (unlikely(!skb)) {
 577                 vinfo->stats[q_idx].netstats.rx_fifo_errors++;
 578                 return;
 579         }
 580 
 581         memcpy(skb->data, packet->ebuf, packet->tlen);
 582         skb_put(skb, packet->tlen);
 583         skb_queue_tail(&rxq->skbq, skb);
 584 
 585         if (napi_schedule_prep(&rxq->napi)) {
 586                 v_dbg("napi %d scheduling\n", q_idx);
 587                 __napi_schedule(&rxq->napi);
 588         }
 589 }
 590 
 591 static int hfi1_vnic_up(struct hfi1_vnic_vport_info *vinfo)
 592 {
 593         struct hfi1_devdata *dd = vinfo->dd;
 594         struct net_device *netdev = vinfo->netdev;
 595         int i, rc;
 596 
 597         /* ensure virtual eth switch id is valid */
 598         if (!vinfo->vesw_id)
 599                 return -EINVAL;
 600 
 601         rc = xa_insert(&dd->vnic.vesws, vinfo->vesw_id, vinfo, GFP_KERNEL);
 602         if (rc < 0)
 603                 return rc;
 604 
 605         for (i = 0; i < vinfo->num_rx_q; i++) {
 606                 struct hfi1_vnic_rx_queue *rxq = &vinfo->rxq[i];
 607 
 608                 skb_queue_head_init(&rxq->skbq);
 609                 napi_enable(&rxq->napi);
 610         }
 611 
 612         netif_carrier_on(netdev);
 613         netif_tx_start_all_queues(netdev);
 614         set_bit(HFI1_VNIC_UP, &vinfo->flags);
 615 
 616         return 0;
 617 }
 618 
 619 static void hfi1_vnic_down(struct hfi1_vnic_vport_info *vinfo)
 620 {
 621         struct hfi1_devdata *dd = vinfo->dd;
 622         u8 i;
 623 
 624         clear_bit(HFI1_VNIC_UP, &vinfo->flags);
 625         netif_carrier_off(vinfo->netdev);
 626         netif_tx_disable(vinfo->netdev);
 627         xa_erase(&dd->vnic.vesws, vinfo->vesw_id);
 628 
 629         /* ensure irqs see the change */
 630         msix_vnic_synchronize_irq(dd);
 631 
 632         /* remove unread skbs */
 633         for (i = 0; i < vinfo->num_rx_q; i++) {
 634                 struct hfi1_vnic_rx_queue *rxq = &vinfo->rxq[i];
 635 
 636                 napi_disable(&rxq->napi);
 637                 skb_queue_purge(&rxq->skbq);
 638         }
 639 }
 640 
 641 static int hfi1_netdev_open(struct net_device *netdev)
 642 {
 643         struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
 644         int rc;
 645 
 646         mutex_lock(&vinfo->lock);
 647         rc = hfi1_vnic_up(vinfo);
 648         mutex_unlock(&vinfo->lock);
 649         return rc;
 650 }
 651 
 652 static int hfi1_netdev_close(struct net_device *netdev)
 653 {
 654         struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
 655 
 656         mutex_lock(&vinfo->lock);
 657         if (test_bit(HFI1_VNIC_UP, &vinfo->flags))
 658                 hfi1_vnic_down(vinfo);
 659         mutex_unlock(&vinfo->lock);
 660         return 0;
 661 }
 662 
 663 static int hfi1_vnic_allot_ctxt(struct hfi1_devdata *dd,
 664                                 struct hfi1_ctxtdata **vnic_ctxt)
 665 {
 666         int rc;
 667 
 668         rc = allocate_vnic_ctxt(dd, vnic_ctxt);
 669         if (rc) {
 670                 dd_dev_err(dd, "vnic ctxt alloc failed %d\n", rc);
 671                 return rc;
 672         }
 673 
 674         rc = setup_vnic_ctxt(dd, *vnic_ctxt);
 675         if (rc) {
 676                 dd_dev_err(dd, "vnic ctxt setup failed %d\n", rc);
 677                 deallocate_vnic_ctxt(dd, *vnic_ctxt);
 678                 *vnic_ctxt = NULL;
 679         }
 680 
 681         return rc;
 682 }
 683 
 684 static int hfi1_vnic_init(struct hfi1_vnic_vport_info *vinfo)
 685 {
 686         struct hfi1_devdata *dd = vinfo->dd;
 687         int i, rc = 0;
 688 
 689         mutex_lock(&hfi1_mutex);
 690         if (!dd->vnic.num_vports) {
 691                 rc = hfi1_vnic_txreq_init(dd);
 692                 if (rc)
 693                         goto txreq_fail;
 694         }
 695 
 696         for (i = dd->vnic.num_ctxt; i < vinfo->num_rx_q; i++) {
 697                 rc = hfi1_vnic_allot_ctxt(dd, &dd->vnic.ctxt[i]);
 698                 if (rc)
 699                         break;
 700                 hfi1_rcd_get(dd->vnic.ctxt[i]);
 701                 dd->vnic.ctxt[i]->vnic_q_idx = i;
 702         }
 703 
 704         if (i < vinfo->num_rx_q) {
 705                 /*
 706                  * If required amount of contexts is not
 707                  * allocated successfully then remaining contexts
 708                  * are released.
 709                  */
 710                 while (i-- > dd->vnic.num_ctxt) {
 711                         deallocate_vnic_ctxt(dd, dd->vnic.ctxt[i]);
 712                         hfi1_rcd_put(dd->vnic.ctxt[i]);
 713                         dd->vnic.ctxt[i] = NULL;
 714                 }
 715                 goto alloc_fail;
 716         }
 717 
 718         if (dd->vnic.num_ctxt != i) {
 719                 dd->vnic.num_ctxt = i;
 720                 hfi1_init_vnic_rsm(dd);
 721         }
 722 
 723         dd->vnic.num_vports++;
 724         hfi1_vnic_sdma_init(vinfo);
 725 alloc_fail:
 726         if (!dd->vnic.num_vports)
 727                 hfi1_vnic_txreq_deinit(dd);
 728 txreq_fail:
 729         mutex_unlock(&hfi1_mutex);
 730         return rc;
 731 }
 732 
 733 static void hfi1_vnic_deinit(struct hfi1_vnic_vport_info *vinfo)
 734 {
 735         struct hfi1_devdata *dd = vinfo->dd;
 736         int i;
 737 
 738         mutex_lock(&hfi1_mutex);
 739         if (--dd->vnic.num_vports == 0) {
 740                 for (i = 0; i < dd->vnic.num_ctxt; i++) {
 741                         deallocate_vnic_ctxt(dd, dd->vnic.ctxt[i]);
 742                         hfi1_rcd_put(dd->vnic.ctxt[i]);
 743                         dd->vnic.ctxt[i] = NULL;
 744                 }
 745                 hfi1_deinit_vnic_rsm(dd);
 746                 dd->vnic.num_ctxt = 0;
 747                 hfi1_vnic_txreq_deinit(dd);
 748         }
 749         mutex_unlock(&hfi1_mutex);
 750 }
 751 
 752 static void hfi1_vnic_set_vesw_id(struct net_device *netdev, int id)
 753 {
 754         struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
 755         bool reopen = false;
 756 
 757         /*
 758          * If vesw_id is being changed, and if the vnic port is up,
 759          * reset the vnic port to ensure new vesw_id gets picked up
 760          */
 761         if (id != vinfo->vesw_id) {
 762                 mutex_lock(&vinfo->lock);
 763                 if (test_bit(HFI1_VNIC_UP, &vinfo->flags)) {
 764                         hfi1_vnic_down(vinfo);
 765                         reopen = true;
 766                 }
 767 
 768                 vinfo->vesw_id = id;
 769                 if (reopen)
 770                         hfi1_vnic_up(vinfo);
 771 
 772                 mutex_unlock(&vinfo->lock);
 773         }
 774 }
 775 
 776 /* netdev ops */
 777 static const struct net_device_ops hfi1_netdev_ops = {
 778         .ndo_open = hfi1_netdev_open,
 779         .ndo_stop = hfi1_netdev_close,
 780         .ndo_start_xmit = hfi1_netdev_start_xmit,
 781         .ndo_select_queue = hfi1_vnic_select_queue,
 782         .ndo_get_stats64 = hfi1_vnic_get_stats64,
 783 };
 784 
 785 static void hfi1_vnic_free_rn(struct net_device *netdev)
 786 {
 787         struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
 788 
 789         hfi1_vnic_deinit(vinfo);
 790         mutex_destroy(&vinfo->lock);
 791         free_netdev(netdev);
 792 }
 793 
 794 struct net_device *hfi1_vnic_alloc_rn(struct ib_device *device,
 795                                       u8 port_num,
 796                                       enum rdma_netdev_t type,
 797                                       const char *name,
 798                                       unsigned char name_assign_type,
 799                                       void (*setup)(struct net_device *))
 800 {
 801         struct hfi1_devdata *dd = dd_from_ibdev(device);
 802         struct hfi1_vnic_vport_info *vinfo;
 803         struct net_device *netdev;
 804         struct rdma_netdev *rn;
 805         int i, size, rc;
 806 
 807         if (!dd->num_vnic_contexts)
 808                 return ERR_PTR(-ENOMEM);
 809 
 810         if (!port_num || (port_num > dd->num_pports))
 811                 return ERR_PTR(-EINVAL);
 812 
 813         if (type != RDMA_NETDEV_OPA_VNIC)
 814                 return ERR_PTR(-EOPNOTSUPP);
 815 
 816         size = sizeof(struct opa_vnic_rdma_netdev) + sizeof(*vinfo);
 817         netdev = alloc_netdev_mqs(size, name, name_assign_type, setup,
 818                                   dd->num_sdma, dd->num_vnic_contexts);
 819         if (!netdev)
 820                 return ERR_PTR(-ENOMEM);
 821 
 822         rn = netdev_priv(netdev);
 823         vinfo = opa_vnic_dev_priv(netdev);
 824         vinfo->dd = dd;
 825         vinfo->num_tx_q = dd->num_sdma;
 826         vinfo->num_rx_q = dd->num_vnic_contexts;
 827         vinfo->netdev = netdev;
 828         rn->free_rdma_netdev = hfi1_vnic_free_rn;
 829         rn->set_id = hfi1_vnic_set_vesw_id;
 830 
 831         netdev->features = NETIF_F_HIGHDMA | NETIF_F_SG;
 832         netdev->hw_features = netdev->features;
 833         netdev->vlan_features = netdev->features;
 834         netdev->watchdog_timeo = msecs_to_jiffies(HFI_TX_TIMEOUT_MS);
 835         netdev->netdev_ops = &hfi1_netdev_ops;
 836         mutex_init(&vinfo->lock);
 837 
 838         for (i = 0; i < vinfo->num_rx_q; i++) {
 839                 struct hfi1_vnic_rx_queue *rxq = &vinfo->rxq[i];
 840 
 841                 rxq->idx = i;
 842                 rxq->vinfo = vinfo;
 843                 rxq->netdev = netdev;
 844                 netif_napi_add(netdev, &rxq->napi, hfi1_vnic_napi, 64);
 845         }
 846 
 847         rc = hfi1_vnic_init(vinfo);
 848         if (rc)
 849                 goto init_fail;
 850 
 851         return netdev;
 852 init_fail:
 853         mutex_destroy(&vinfo->lock);
 854         free_netdev(netdev);
 855         return ERR_PTR(rc);
 856 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/infiniband/hw/hfi1/vnic_main.c

DEFINITIONS
