2 * Copyright (c) 2011 Mellanox Technologies. All rights reserved.
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5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
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8 * OpenIB.org BSD license below:
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11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
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21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #include <linux/dcbnl.h>
38 static int mlx4_en_dcbnl_ieee_getets(struct net_device *dev,
41 struct mlx4_en_priv *priv = netdev_priv(dev);
42 struct ieee_ets *my_ets = &priv->ets;
44 /* No IEEE PFC settings available */
48 ets->ets_cap = IEEE_8021QAZ_MAX_TCS;
49 ets->cbs = my_ets->cbs;
50 memcpy(ets->tc_tx_bw, my_ets->tc_tx_bw, sizeof(ets->tc_tx_bw));
51 memcpy(ets->tc_tsa, my_ets->tc_tsa, sizeof(ets->tc_tsa));
52 memcpy(ets->prio_tc, my_ets->prio_tc, sizeof(ets->prio_tc));
57 static int mlx4_en_ets_validate(struct mlx4_en_priv *priv, struct ieee_ets *ets)
63 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
64 if (ets->prio_tc[i] > MLX4_EN_NUM_UP) {
65 en_err(priv, "Bad priority in UP <=> TC mapping. TC: %d, UP: %d\n",
70 switch (ets->tc_tsa[i]) {
71 case IEEE_8021QAZ_TSA_STRICT:
73 case IEEE_8021QAZ_TSA_ETS:
75 total_ets_bw += ets->tc_tx_bw[i];
78 en_err(priv, "TC[%d]: Not supported TSA: %d\n",
84 if (has_ets_tc && total_ets_bw != MLX4_EN_BW_MAX) {
85 en_err(priv, "Bad ETS BW sum: %d. Should be exactly 100%%\n",
93 static int mlx4_en_config_port_scheduler(struct mlx4_en_priv *priv,
94 struct ieee_ets *ets, u16 *ratelimit)
96 struct mlx4_en_dev *mdev = priv->mdev;
99 __u8 tc_tx_bw[IEEE_8021QAZ_MAX_TCS] = { 0 };
100 __u8 pg[IEEE_8021QAZ_MAX_TCS] = { 0 };
102 ets = ets ?: &priv->ets;
103 ratelimit = ratelimit ?: priv->maxrate;
105 /* higher TC means higher priority => lower pg */
106 for (i = IEEE_8021QAZ_MAX_TCS - 1; i >= 0; i--) {
107 switch (ets->tc_tsa[i]) {
108 case IEEE_8021QAZ_TSA_STRICT:
109 pg[i] = num_strict++;
110 tc_tx_bw[i] = MLX4_EN_BW_MAX;
112 case IEEE_8021QAZ_TSA_ETS:
113 pg[i] = MLX4_EN_TC_ETS;
114 tc_tx_bw[i] = ets->tc_tx_bw[i] ?: MLX4_EN_BW_MIN;
119 return mlx4_SET_PORT_SCHEDULER(mdev->dev, priv->port, tc_tx_bw, pg,
124 mlx4_en_dcbnl_ieee_setets(struct net_device *dev, struct ieee_ets *ets)
126 struct mlx4_en_priv *priv = netdev_priv(dev);
127 struct mlx4_en_dev *mdev = priv->mdev;
130 err = mlx4_en_ets_validate(priv, ets);
134 err = mlx4_SET_PORT_PRIO2TC(mdev->dev, priv->port, ets->prio_tc);
138 err = mlx4_en_config_port_scheduler(priv, ets, NULL);
142 memcpy(&priv->ets, ets, sizeof(priv->ets));
147 static int mlx4_en_dcbnl_ieee_getpfc(struct net_device *dev,
148 struct ieee_pfc *pfc)
150 struct mlx4_en_priv *priv = netdev_priv(dev);
152 pfc->pfc_cap = IEEE_8021QAZ_MAX_TCS;
153 pfc->pfc_en = priv->prof->tx_ppp;
158 static int mlx4_en_dcbnl_ieee_setpfc(struct net_device *dev,
159 struct ieee_pfc *pfc)
161 struct mlx4_en_priv *priv = netdev_priv(dev);
162 struct mlx4_en_dev *mdev = priv->mdev;
165 en_dbg(DRV, priv, "cap: 0x%x en: 0x%x mbc: 0x%x delay: %d\n",
171 priv->prof->rx_pause = priv->prof->tx_pause = !!pfc->pfc_en;
172 priv->prof->rx_ppp = priv->prof->tx_ppp = pfc->pfc_en;
174 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
175 priv->rx_skb_size + ETH_FCS_LEN,
176 priv->prof->tx_pause,
178 priv->prof->rx_pause,
181 en_err(priv, "Failed setting pause params\n");
186 static u8 mlx4_en_dcbnl_getdcbx(struct net_device *dev)
188 return DCB_CAP_DCBX_VER_IEEE;
191 static u8 mlx4_en_dcbnl_setdcbx(struct net_device *dev, u8 mode)
193 if ((mode & DCB_CAP_DCBX_LLD_MANAGED) ||
194 (mode & DCB_CAP_DCBX_VER_CEE) ||
195 !(mode & DCB_CAP_DCBX_VER_IEEE) ||
196 !(mode & DCB_CAP_DCBX_HOST))
202 #define MLX4_RATELIMIT_UNITS_IN_KB 100000 /* rate-limit HW unit in Kbps */
203 static int mlx4_en_dcbnl_ieee_getmaxrate(struct net_device *dev,
204 struct ieee_maxrate *maxrate)
206 struct mlx4_en_priv *priv = netdev_priv(dev);
212 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
213 maxrate->tc_maxrate[i] =
214 priv->maxrate[i] * MLX4_RATELIMIT_UNITS_IN_KB;
219 static int mlx4_en_dcbnl_ieee_setmaxrate(struct net_device *dev,
220 struct ieee_maxrate *maxrate)
222 struct mlx4_en_priv *priv = netdev_priv(dev);
223 u16 tmp[IEEE_8021QAZ_MAX_TCS];
226 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
227 /* Convert from Kbps into HW units, rounding result up.
228 * Setting to 0, means unlimited BW.
231 (maxrate->tc_maxrate[i] + MLX4_RATELIMIT_UNITS_IN_KB -
232 1) / MLX4_RATELIMIT_UNITS_IN_KB;
235 err = mlx4_en_config_port_scheduler(priv, NULL, tmp);
239 memcpy(priv->maxrate, tmp, sizeof(*priv->maxrate));
244 const struct dcbnl_rtnl_ops mlx4_en_dcbnl_ops = {
245 .ieee_getets = mlx4_en_dcbnl_ieee_getets,
246 .ieee_setets = mlx4_en_dcbnl_ieee_setets,
247 .ieee_getmaxrate = mlx4_en_dcbnl_ieee_getmaxrate,
248 .ieee_setmaxrate = mlx4_en_dcbnl_ieee_setmaxrate,
249 .ieee_getpfc = mlx4_en_dcbnl_ieee_getpfc,
250 .ieee_setpfc = mlx4_en_dcbnl_ieee_setpfc,
252 .getdcbx = mlx4_en_dcbnl_getdcbx,
253 .setdcbx = mlx4_en_dcbnl_setdcbx,