Quelle  hclge_dcb.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0+
// Copyright (c) 2016-2017 Hisilicon Limited.

#include "hclge_main.h"
#include "hclge_dcb.h"
#include "hclge_tm.h"
#include "hnae3.h"

#define BW_PERCENT 100

static int hclge_ieee_ets_to_tm_info(struct hclge_dev *hdev,
         struct ieee_ets *ets)
{
 u8 i;

 for (i = 0; i < HNAE3_MAX_TC; i++) {
  switch (ets->tc_tsa[i]) {
  case IEEE_8021QAZ_TSA_STRICT:
   hdev->tm_info.tc_info[i].tc_sch_mode =
    HCLGE_SCH_MODE_SP;
   hdev->tm_info.pg_info[0].tc_dwrr[i] = 0;
   break;
  case IEEE_8021QAZ_TSA_ETS:
   hdev->tm_info.tc_info[i].tc_sch_mode =
    HCLGE_SCH_MODE_DWRR;
   hdev->tm_info.pg_info[0].tc_dwrr[i] =
    ets->tc_tx_bw[i];
   break;
  default:
   /* Hardware only supports SP (strict priority)
 * or ETS (enhanced transmission selection)
 * algorithms, if we receive some other value
 * from dcbnl, then throw an error.
 */
   return -EINVAL;
  }
 }

 hclge_tm_prio_tc_info_update(hdev, ets->prio_tc);

 return 0;
}

static void hclge_tm_info_to_ieee_ets(struct hclge_dev *hdev,
          struct ieee_ets *ets)
{
 u32 i;

 memset(ets, 0, sizeof(*ets));
 ets->willing = 1;
 ets->ets_cap = hdev->tc_max;

 for (i = 0; i < HNAE3_MAX_TC; i++) {
  ets->prio_tc[i] = hdev->tm_info.prio_tc[i];
  if (i < hdev->tm_info.num_tc)
   ets->tc_tx_bw[i] = hdev->tm_info.pg_info[0].tc_dwrr[i];
  else
   ets->tc_tx_bw[i] = 0;

  if (hdev->tm_info.tc_info[i].tc_sch_mode ==
      HCLGE_SCH_MODE_SP)
   ets->tc_tsa[i] = IEEE_8021QAZ_TSA_STRICT;
  else
   ets->tc_tsa[i] = IEEE_8021QAZ_TSA_ETS;
 }
}

/* IEEE std */
static int hclge_ieee_getets(struct hnae3_handle *h, struct ieee_ets *ets)
{
 struct hclge_vport *vport = hclge_get_vport(h);
 struct hclge_dev *hdev = vport->back;

 hclge_tm_info_to_ieee_ets(hdev, ets);

 return 0;
}

static int hclge_dcb_common_validate(struct hclge_dev *hdev, u8 num_tc,
         u8 *prio_tc)
{
 int i;

 if (num_tc > hdev->tc_max) {
  dev_err(&hdev->pdev->dev,
   "tc num checking failed, %u > tc_max(%u)\n",
   num_tc, hdev->tc_max);
  return -EINVAL;
 }

 for (i = 0; i < HNAE3_MAX_USER_PRIO; i++) {
  if (prio_tc[i] >= num_tc) {
   dev_err(&hdev->pdev->dev,
    "prio_tc[%d] checking failed, %u >= num_tc(%u)\n",
    i, prio_tc[i], num_tc);
   return -EINVAL;
  }
 }

 if (num_tc > hdev->vport[0].alloc_tqps) {
  dev_err(&hdev->pdev->dev,
   "allocated tqp checking failed, %u > tqp(%u)\n",
   num_tc, hdev->vport[0].alloc_tqps);
  return -EINVAL;
 }

 return 0;
}

static u8 hclge_ets_tc_changed(struct hclge_dev *hdev, struct ieee_ets *ets,
          bool *changed)
{
 u8 max_tc_id = 0;
 u8 i;

 for (i = 0; i < HNAE3_MAX_USER_PRIO; i++) {
  if (ets->prio_tc[i] != hdev->tm_info.prio_tc[i])
   *changed = true;

  if (ets->prio_tc[i] > max_tc_id)
   max_tc_id = ets->prio_tc[i];
 }

 /* return max tc number, max tc id need to plus 1 */
 return max_tc_id + 1;
}

static int hclge_ets_sch_mode_validate(struct hclge_dev *hdev,
           struct ieee_ets *ets, bool *changed,
           u8 tc_num)
{
 bool has_ets_tc = false;
 u32 total_ets_bw = 0;
 u8 i;

 for (i = 0; i < HNAE3_MAX_TC; i++) {
  switch (ets->tc_tsa[i]) {
  case IEEE_8021QAZ_TSA_STRICT:
   if (hdev->tm_info.tc_info[i].tc_sch_mode !=
    HCLGE_SCH_MODE_SP)
    *changed = true;
   break;
  case IEEE_8021QAZ_TSA_ETS:
   if (i >= tc_num) {
    dev_err(&hdev->pdev->dev,
     "tc%u is disabled, cannot set ets bw\n",
     i);
    return -EINVAL;
   }

   /* The hardware will switch to sp mode if bandwidth is
 * 0, so limit ets bandwidth must be greater than 0.
 */
   if (!ets->tc_tx_bw[i]) {
    dev_err(&hdev->pdev->dev,
     "tc%u ets bw cannot be 0\n", i);
    return -EINVAL;
   }

   if (hdev->tm_info.tc_info[i].tc_sch_mode !=
    HCLGE_SCH_MODE_DWRR)
    *changed = true;

   total_ets_bw += ets->tc_tx_bw[i];
   has_ets_tc = true;
   break;
  default:
   return -EINVAL;
  }
 }

 if (has_ets_tc && total_ets_bw != BW_PERCENT)
  return -EINVAL;

 return 0;
}

static int hclge_ets_validate(struct hclge_dev *hdev, struct ieee_ets *ets,
         u8 *tc, bool *changed)
{
 u8 tc_num;
 int ret;

 tc_num = hclge_ets_tc_changed(hdev, ets, changed);

 ret = hclge_dcb_common_validate(hdev, tc_num, ets->prio_tc);
 if (ret)
  return ret;

 ret = hclge_ets_sch_mode_validate(hdev, ets, changed, tc_num);
 if (ret)
  return ret;

 *tc = tc_num;
 if (*tc != hdev->tm_info.num_tc)
  *changed = true;

 return 0;
}

static int hclge_map_update(struct hclge_dev *hdev)
{
 int ret;

 ret = hclge_tm_schd_setup_hw(hdev);
 if (ret)
  return ret;

 ret = hclge_pause_setup_hw(hdev, false);
 if (ret)
  return ret;

 ret = hclge_buffer_alloc(hdev);
 if (ret)
  return ret;

 hclge_comm_rss_indir_init_cfg(hdev->ae_dev, &hdev->rss_cfg);

 return hclge_rss_init_hw(hdev);
}

static int hclge_notify_down_uinit(struct hclge_dev *hdev)
{
 int ret;

 ret = hclge_notify_client(hdev, HNAE3_DOWN_CLIENT);
 if (ret)
  return ret;

 ret = hclge_tm_flush_cfg(hdev, true);
 if (ret)
  return ret;

 return hclge_notify_client(hdev, HNAE3_UNINIT_CLIENT);
}

static int hclge_notify_init_up(struct hclge_dev *hdev)
{
 int ret;

 ret = hclge_notify_client(hdev, HNAE3_INIT_CLIENT);
 if (ret)
  return ret;

 ret = hclge_tm_flush_cfg(hdev, false);
 if (ret)
  return ret;

 return hclge_notify_client(hdev, HNAE3_UP_CLIENT);
}

static int hclge_ieee_setets(struct hnae3_handle *h, struct ieee_ets *ets)
{
 struct hclge_vport *vport = hclge_get_vport(h);
 struct net_device *netdev = h->kinfo.netdev;
 struct hclge_dev *hdev = vport->back;
 bool map_changed = false;
 u8 num_tc = 0;
 int ret;

 if (!(hdev->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
     h->kinfo.tc_info.mqprio_active)
  return -EINVAL;

 ret = hclge_ets_validate(hdev, ets, &num_tc, &map_changed);
 if (ret)
  return ret;

 if (map_changed) {
  netif_dbg(h, drv, netdev, "set ets\n");

  ret = hclge_notify_down_uinit(hdev);
  if (ret)
   return ret;
 }

 hclge_tm_schd_info_update(hdev, num_tc);
 h->kinfo.tc_info.dcb_ets_active = num_tc > 1;

 ret = hclge_ieee_ets_to_tm_info(hdev, ets);
 if (ret)
  goto err_out;

 if (map_changed) {
  ret = hclge_map_update(hdev);
  if (ret)
   goto err_out;

  return hclge_notify_init_up(hdev);
 }

 return hclge_tm_dwrr_cfg(hdev);

err_out:
 if (!map_changed)
  return ret;

 hclge_notify_init_up(hdev);

 return ret;
}

static int hclge_ieee_getpfc(struct hnae3_handle *h, struct ieee_pfc *pfc)
{
 struct hclge_vport *vport = hclge_get_vport(h);
 struct hclge_dev *hdev = vport->back;
 int ret;

 memset(pfc, 0, sizeof(*pfc));
 pfc->pfc_cap = hdev->pfc_max;
 pfc->pfc_en = hdev->tm_info.pfc_en;

 ret = hclge_mac_update_stats(hdev);
 if (ret) {
  dev_err(&hdev->pdev->dev,
   "failed to update MAC stats, ret = %d.\n", ret);
  return ret;
 }

 hclge_pfc_tx_stats_get(hdev, pfc->requests);
 hclge_pfc_rx_stats_get(hdev, pfc->indications);

 return 0;
}

static int hclge_ieee_setpfc(struct hnae3_handle *h, struct ieee_pfc *pfc)
{
 struct hclge_vport *vport = hclge_get_vport(h);
 struct net_device *netdev = h->kinfo.netdev;
 struct hclge_dev *hdev = vport->back;
 u8 i, j, pfc_map, *prio_tc;
 int last_bad_ret = 0;
 int ret;

 if (!(hdev->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
  return -EINVAL;

 if (pfc->pfc_en == hdev->tm_info.pfc_en)
  return 0;

 prio_tc = hdev->tm_info.prio_tc;
 pfc_map = 0;

 for (i = 0; i < hdev->tm_info.num_tc; i++) {
  for (j = 0; j < HNAE3_MAX_USER_PRIO; j++) {
   if ((prio_tc[j] == i) && (pfc->pfc_en & BIT(j))) {
    pfc_map |= BIT(i);
    break;
   }
  }
 }

 hdev->tm_info.hw_pfc_map = pfc_map;
 hdev->tm_info.pfc_en = pfc->pfc_en;

 netif_dbg(h, drv, netdev,
    "set pfc: pfc_en=%x, pfc_map=%x, num_tc=%u\n",
    pfc->pfc_en, pfc_map, hdev->tm_info.num_tc);

 hclge_tm_pfc_info_update(hdev);

 ret = hclge_pause_setup_hw(hdev, false);
 if (ret)
  return ret;

 ret = hclge_notify_client(hdev, HNAE3_DOWN_CLIENT);
 if (ret)
  return ret;

 ret = hclge_tm_flush_cfg(hdev, true);
 if (ret)
  return ret;

 /* No matter whether the following operations are performed
 * successfully or not, disabling the tm flush and notify
 * the network status to up are necessary.
 * Do not return immediately.
 */
 ret = hclge_buffer_alloc(hdev);
 if (ret)
  last_bad_ret = ret;

 ret = hclge_tm_flush_cfg(hdev, false);
 if (ret)
  last_bad_ret = ret;

 ret = hclge_notify_client(hdev, HNAE3_UP_CLIENT);
 if (ret)
  last_bad_ret = ret;

 return last_bad_ret;
}

static int hclge_ieee_setapp(struct hnae3_handle *h, struct dcb_app *app)
{
 struct hclge_vport *vport = hclge_get_vport(h);
 struct net_device *netdev = h->kinfo.netdev;
 struct hclge_dev *hdev = vport->back;
 struct dcb_app old_app;
 int ret;

 if (app->selector != IEEE_8021QAZ_APP_SEL_DSCP ||
     app->protocol >= HNAE3_MAX_DSCP ||
     app->priority >= HNAE3_MAX_USER_PRIO)
  return -EINVAL;

 dev_info(&hdev->pdev->dev, "setapp dscp=%u priority=%u\n",
   app->protocol, app->priority);

 if (app->priority == h->kinfo.dscp_prio[app->protocol])
  return 0;

 ret = dcb_ieee_setapp(netdev, app);
 if (ret)
  return ret;

 old_app.selector = IEEE_8021QAZ_APP_SEL_DSCP;
 old_app.protocol = app->protocol;
 old_app.priority = h->kinfo.dscp_prio[app->protocol];

 h->kinfo.dscp_prio[app->protocol] = app->priority;
 ret = hclge_dscp_to_tc_map(hdev);
 if (ret) {
  dev_err(&hdev->pdev->dev,
   "failed to set dscp to tc map, ret = %d\n", ret);
  h->kinfo.dscp_prio[app->protocol] = old_app.priority;
  (void)dcb_ieee_delapp(netdev, app);
  return ret;
 }

 vport->nic.kinfo.tc_map_mode = HNAE3_TC_MAP_MODE_DSCP;
 if (old_app.priority == HNAE3_PRIO_ID_INVALID)
  h->kinfo.dscp_app_cnt++;
 else
  ret = dcb_ieee_delapp(netdev, &old_app);

 return ret;
}

static int hclge_ieee_delapp(struct hnae3_handle *h, struct dcb_app *app)
{
 struct hclge_vport *vport = hclge_get_vport(h);
 struct net_device *netdev = h->kinfo.netdev;
 struct hclge_dev *hdev = vport->back;
 int ret;

 if (app->selector != IEEE_8021QAZ_APP_SEL_DSCP ||
     app->protocol >= HNAE3_MAX_DSCP ||
     app->priority >= HNAE3_MAX_USER_PRIO ||
     app->priority != h->kinfo.dscp_prio[app->protocol])
  return -EINVAL;

 dev_info(&hdev->pdev->dev, "delapp dscp=%u priority=%u\n",
   app->protocol, app->priority);

 ret = dcb_ieee_delapp(netdev, app);
 if (ret)
  return ret;

 h->kinfo.dscp_prio[app->protocol] = HNAE3_PRIO_ID_INVALID;
 ret = hclge_dscp_to_tc_map(hdev);
 if (ret) {
  dev_err(&hdev->pdev->dev,
   "failed to del dscp to tc map, ret = %d\n", ret);
  h->kinfo.dscp_prio[app->protocol] = app->priority;
  (void)dcb_ieee_setapp(netdev, app);
  return ret;
 }

 if (h->kinfo.dscp_app_cnt)
  h->kinfo.dscp_app_cnt--;

 if (!h->kinfo.dscp_app_cnt) {
  vport->nic.kinfo.tc_map_mode = HNAE3_TC_MAP_MODE_PRIO;
  ret = hclge_up_to_tc_map(hdev);
 }

 return ret;
}

/* DCBX configuration */
static u8 hclge_getdcbx(struct hnae3_handle *h)
{
 struct hclge_vport *vport = hclge_get_vport(h);
 struct hclge_dev *hdev = vport->back;

 if (h->kinfo.tc_info.mqprio_active)
  return 0;

 return hdev->dcbx_cap;
}

static u8 hclge_setdcbx(struct hnae3_handle *h, u8 mode)
{
 struct hclge_vport *vport = hclge_get_vport(h);
 struct net_device *netdev = h->kinfo.netdev;
 struct hclge_dev *hdev = vport->back;

 netif_dbg(h, drv, netdev, "set dcbx: mode=%u\n", mode);

 /* No support for LLD_MANAGED modes or CEE */
 if ((mode & DCB_CAP_DCBX_LLD_MANAGED) ||
     (mode & DCB_CAP_DCBX_VER_CEE) ||
     !(mode & DCB_CAP_DCBX_HOST))
  return 1;

 hdev->dcbx_cap = mode;

 return 0;
}

static int hclge_mqprio_qopt_check(struct hclge_dev *hdev,
       struct tc_mqprio_qopt_offload *mqprio_qopt)
{
 u16 queue_sum = 0;
 int ret;
 int i;

 if (!mqprio_qopt->qopt.num_tc) {
  mqprio_qopt->qopt.num_tc = 1;
  return 0;
 }

 ret = hclge_dcb_common_validate(hdev, mqprio_qopt->qopt.num_tc,
     mqprio_qopt->qopt.prio_tc_map);
 if (ret)
  return ret;

 for (i = 0; i < mqprio_qopt->qopt.num_tc; i++) {
  if (!is_power_of_2(mqprio_qopt->qopt.count[i])) {
   dev_err(&hdev->pdev->dev,
    "qopt queue count must be power of 2\n");
   return -EINVAL;
  }

  if (mqprio_qopt->qopt.count[i] > hdev->pf_rss_size_max) {
   dev_err(&hdev->pdev->dev,
    "qopt queue count should be no more than %u\n",
    hdev->pf_rss_size_max);
   return -EINVAL;
  }

  if (mqprio_qopt->qopt.offset[i] != queue_sum) {
   dev_err(&hdev->pdev->dev,
    "qopt queue offset must start from 0, and being continuous\n");
   return -EINVAL;
  }

  if (mqprio_qopt->min_rate[i] || mqprio_qopt->max_rate[i]) {
   dev_err(&hdev->pdev->dev,
    "qopt tx_rate is not supported\n");
   return -EOPNOTSUPP;
  }

  queue_sum = mqprio_qopt->qopt.offset[i];
  queue_sum += mqprio_qopt->qopt.count[i];
 }
 if (hdev->vport[0].alloc_tqps < queue_sum) {
  dev_err(&hdev->pdev->dev,
   "qopt queue count sum should be less than %u\n",
   hdev->vport[0].alloc_tqps);
  return -EINVAL;
 }

 return 0;
}

static void hclge_sync_mqprio_qopt(struct hnae3_tc_info *tc_info,
       struct tc_mqprio_qopt_offload *mqprio_qopt)
{
 memset(tc_info, 0, sizeof(*tc_info));
 tc_info->num_tc = mqprio_qopt->qopt.num_tc;
 memcpy(tc_info->prio_tc, mqprio_qopt->qopt.prio_tc_map,
        sizeof_field(struct hnae3_tc_info, prio_tc));
 memcpy(tc_info->tqp_count, mqprio_qopt->qopt.count,
        sizeof_field(struct hnae3_tc_info, tqp_count));
 memcpy(tc_info->tqp_offset, mqprio_qopt->qopt.offset,
        sizeof_field(struct hnae3_tc_info, tqp_offset));
}

static int hclge_config_tc(struct hclge_dev *hdev,
      struct hnae3_tc_info *tc_info)
{
 int i;

 hclge_tm_schd_info_update(hdev, tc_info->num_tc);
 for (i = 0; i < HNAE3_MAX_USER_PRIO; i++)
  hdev->tm_info.prio_tc[i] = tc_info->prio_tc[i];

 return hclge_map_update(hdev);
}

/* Set up TC for hardware offloaded mqprio in channel mode */
static int hclge_setup_tc(struct hnae3_handle *h,
     struct tc_mqprio_qopt_offload *mqprio_qopt)
{
 struct hclge_vport *vport = hclge_get_vport(h);
 struct hnae3_knic_private_info *kinfo;
 struct hclge_dev *hdev = vport->back;
 struct hnae3_tc_info old_tc_info;
 u8 tc = mqprio_qopt->qopt.num_tc;
 int ret;

 /* if client unregistered, it's not allowed to change
 * mqprio configuration, which may cause uninit ring
 * fail.
 */
 if (!test_bit(HCLGE_STATE_NIC_REGISTERED, &hdev->state))
  return -EBUSY;

 kinfo = &vport->nic.kinfo;
 if (kinfo->tc_info.dcb_ets_active)
  return -EINVAL;

 ret = hclge_mqprio_qopt_check(hdev, mqprio_qopt);
 if (ret) {
  dev_err(&hdev->pdev->dev,
   "failed to check mqprio qopt params, ret = %d\n", ret);
  return ret;
 }

 kinfo->tc_info.mqprio_destroy = !tc;

 ret = hclge_notify_down_uinit(hdev);
 if (ret)
  return ret;

 memcpy(&old_tc_info, &kinfo->tc_info, sizeof(old_tc_info));
 hclge_sync_mqprio_qopt(&kinfo->tc_info, mqprio_qopt);
 kinfo->tc_info.mqprio_active = tc > 0;

 ret = hclge_config_tc(hdev, &kinfo->tc_info);
 if (ret)
  goto err_out;

 return hclge_notify_init_up(hdev);

err_out:
 if (!tc) {
  dev_warn(&hdev->pdev->dev,
    "failed to destroy mqprio, will active after reset, ret = %d\n",
    ret);
 } else {
  /* roll-back */
  memcpy(&kinfo->tc_info, &old_tc_info, sizeof(old_tc_info));
  if (hclge_config_tc(hdev, &kinfo->tc_info))
   dev_err(&hdev->pdev->dev,
    "failed to roll back tc configuration\n");
 }
 hclge_notify_init_up(hdev);

 return ret;
}

static const struct hnae3_dcb_ops hns3_dcb_ops = {
 .ieee_getets = hclge_ieee_getets,
 .ieee_setets = hclge_ieee_setets,
 .ieee_getpfc = hclge_ieee_getpfc,
 .ieee_setpfc = hclge_ieee_setpfc,
 .ieee_setapp    = hclge_ieee_setapp,
 .ieee_delapp    = hclge_ieee_delapp,
 .getdcbx = hclge_getdcbx,
 .setdcbx = hclge_setdcbx,
 .setup_tc = hclge_setup_tc,
};

void hclge_dcb_ops_set(struct hclge_dev *hdev)
{
 struct hclge_vport *vport = hdev->vport;
 struct hnae3_knic_private_info *kinfo;

 /* Hdev does not support DCB or vport is
 * not a pf, then dcb_ops is not set.
 */
 if (!hnae3_dev_dcb_supported(hdev) ||
     vport->vport_id != 0)
  return;

 kinfo = &vport->nic.kinfo;
 kinfo->dcb_ops = &hns3_dcb_ops;
 hdev->dcbx_cap = DCB_CAP_DCBX_VER_IEEE | DCB_CAP_DCBX_HOST;
}