2 * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
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32 #include <linux/device.h>
33 #include <linux/netdevice.h>
36 #define MLX5E_MAX_PRIORITY 8
38 #define MLX5E_100MB (100000)
39 #define MLX5E_1GB (1000000)
41 static int mlx5e_dcbnl_ieee_getets(struct net_device *netdev,
44 struct mlx5e_priv *priv = netdev_priv(netdev);
46 if (!MLX5_CAP_GEN(priv->mdev, ets))
49 memcpy(ets, &priv->params.ets, sizeof(*ets));
54 MLX5E_VENDOR_TC_GROUP_NUM = 7,
55 MLX5E_ETS_TC_GROUP_NUM = 0,
58 static void mlx5e_build_tc_group(struct ieee_ets *ets, u8 *tc_group, int max_tc)
60 bool any_tc_mapped_to_ets = false;
64 for (i = 0; i <= max_tc; i++)
65 if (ets->tc_tsa[i] == IEEE_8021QAZ_TSA_ETS)
66 any_tc_mapped_to_ets = true;
68 strict_group = any_tc_mapped_to_ets ? 1 : 0;
70 for (i = 0; i <= max_tc; i++) {
71 switch (ets->tc_tsa[i]) {
72 case IEEE_8021QAZ_TSA_VENDOR:
73 tc_group[i] = MLX5E_VENDOR_TC_GROUP_NUM;
75 case IEEE_8021QAZ_TSA_STRICT:
76 tc_group[i] = strict_group++;
78 case IEEE_8021QAZ_TSA_ETS:
79 tc_group[i] = MLX5E_ETS_TC_GROUP_NUM;
85 static void mlx5e_build_tc_tx_bw(struct ieee_ets *ets, u8 *tc_tx_bw,
86 u8 *tc_group, int max_tc)
90 for (i = 0; i <= max_tc; i++) {
91 switch (ets->tc_tsa[i]) {
92 case IEEE_8021QAZ_TSA_VENDOR:
93 tc_tx_bw[i] = MLX5E_MAX_BW_ALLOC;
95 case IEEE_8021QAZ_TSA_STRICT:
96 tc_tx_bw[i] = MLX5E_MAX_BW_ALLOC;
98 case IEEE_8021QAZ_TSA_ETS:
99 tc_tx_bw[i] = ets->tc_tx_bw[i];
105 int mlx5e_dcbnl_ieee_setets_core(struct mlx5e_priv *priv, struct ieee_ets *ets)
107 struct mlx5_core_dev *mdev = priv->mdev;
108 u8 tc_tx_bw[IEEE_8021QAZ_MAX_TCS];
109 u8 tc_group[IEEE_8021QAZ_MAX_TCS];
110 int max_tc = mlx5_max_tc(mdev);
113 if (!MLX5_CAP_GEN(mdev, ets))
116 mlx5e_build_tc_group(ets, tc_group, max_tc);
117 mlx5e_build_tc_tx_bw(ets, tc_tx_bw, tc_group, max_tc);
119 err = mlx5_set_port_prio_tc(mdev, ets->prio_tc);
123 err = mlx5_set_port_tc_group(mdev, tc_group);
127 return mlx5_set_port_tc_bw_alloc(mdev, tc_tx_bw);
130 static int mlx5e_dbcnl_validate_ets(struct net_device *netdev,
131 struct ieee_ets *ets)
136 /* Validate Priority */
137 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
138 if (ets->prio_tc[i] >= MLX5E_MAX_PRIORITY) {
140 "Failed to validate ETS: priority value greater than max(%d)\n",
146 /* Validate Bandwidth Sum */
147 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
148 if (ets->tc_tsa[i] == IEEE_8021QAZ_TSA_ETS) {
149 if (!ets->tc_tx_bw[i]) {
151 "Failed to validate ETS: BW 0 is illegal\n");
155 bw_sum += ets->tc_tx_bw[i];
159 if (bw_sum != 0 && bw_sum != 100) {
161 "Failed to validate ETS: BW sum is illegal\n");
167 static int mlx5e_dcbnl_ieee_setets(struct net_device *netdev,
168 struct ieee_ets *ets)
170 struct mlx5e_priv *priv = netdev_priv(netdev);
173 err = mlx5e_dbcnl_validate_ets(netdev, ets);
177 err = mlx5e_dcbnl_ieee_setets_core(priv, ets);
181 memcpy(&priv->params.ets, ets, sizeof(*ets));
182 priv->params.ets.ets_cap = mlx5_max_tc(priv->mdev) + 1;
187 static int mlx5e_dcbnl_ieee_getpfc(struct net_device *dev,
188 struct ieee_pfc *pfc)
190 struct mlx5e_priv *priv = netdev_priv(dev);
191 struct mlx5_core_dev *mdev = priv->mdev;
192 struct mlx5e_pport_stats *pstats = &priv->stats.pport;
195 pfc->pfc_cap = mlx5_max_tc(mdev) + 1;
196 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
197 pfc->requests[i] = PPORT_PER_PRIO_GET(pstats, i, tx_pause);
198 pfc->indications[i] = PPORT_PER_PRIO_GET(pstats, i, rx_pause);
201 return mlx5_query_port_pfc(mdev, &pfc->pfc_en, NULL);
204 static int mlx5e_dcbnl_ieee_setpfc(struct net_device *dev,
205 struct ieee_pfc *pfc)
207 struct mlx5e_priv *priv = netdev_priv(dev);
208 struct mlx5_core_dev *mdev = priv->mdev;
212 mlx5_query_port_pfc(mdev, &curr_pfc_en, NULL);
214 if (pfc->pfc_en == curr_pfc_en)
217 ret = mlx5_set_port_pfc(mdev, pfc->pfc_en, pfc->pfc_en);
218 mlx5_toggle_port_link(mdev);
223 static u8 mlx5e_dcbnl_getdcbx(struct net_device *dev)
225 return DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE;
228 static u8 mlx5e_dcbnl_setdcbx(struct net_device *dev, u8 mode)
230 if ((mode & DCB_CAP_DCBX_LLD_MANAGED) ||
231 (mode & DCB_CAP_DCBX_VER_CEE) ||
232 !(mode & DCB_CAP_DCBX_VER_IEEE) ||
233 !(mode & DCB_CAP_DCBX_HOST))
239 static int mlx5e_dcbnl_ieee_getmaxrate(struct net_device *netdev,
240 struct ieee_maxrate *maxrate)
242 struct mlx5e_priv *priv = netdev_priv(netdev);
243 struct mlx5_core_dev *mdev = priv->mdev;
244 u8 max_bw_value[IEEE_8021QAZ_MAX_TCS];
245 u8 max_bw_unit[IEEE_8021QAZ_MAX_TCS];
249 err = mlx5_query_port_ets_rate_limit(mdev, max_bw_value, max_bw_unit);
253 memset(maxrate->tc_maxrate, 0, sizeof(maxrate->tc_maxrate));
255 for (i = 0; i <= mlx5_max_tc(mdev); i++) {
256 switch (max_bw_unit[i]) {
257 case MLX5_100_MBPS_UNIT:
258 maxrate->tc_maxrate[i] = max_bw_value[i] * MLX5E_100MB;
261 maxrate->tc_maxrate[i] = max_bw_value[i] * MLX5E_1GB;
263 case MLX5_BW_NO_LIMIT:
266 WARN(true, "non-supported BW unit");
274 static int mlx5e_dcbnl_ieee_setmaxrate(struct net_device *netdev,
275 struct ieee_maxrate *maxrate)
277 struct mlx5e_priv *priv = netdev_priv(netdev);
278 struct mlx5_core_dev *mdev = priv->mdev;
279 u8 max_bw_value[IEEE_8021QAZ_MAX_TCS];
280 u8 max_bw_unit[IEEE_8021QAZ_MAX_TCS];
281 __u64 upper_limit_mbps = roundup(255 * MLX5E_100MB, MLX5E_1GB);
284 memset(max_bw_value, 0, sizeof(max_bw_value));
285 memset(max_bw_unit, 0, sizeof(max_bw_unit));
287 for (i = 0; i <= mlx5_max_tc(mdev); i++) {
288 if (!maxrate->tc_maxrate[i]) {
289 max_bw_unit[i] = MLX5_BW_NO_LIMIT;
292 if (maxrate->tc_maxrate[i] < upper_limit_mbps) {
293 max_bw_value[i] = div_u64(maxrate->tc_maxrate[i],
295 max_bw_value[i] = max_bw_value[i] ? max_bw_value[i] : 1;
296 max_bw_unit[i] = MLX5_100_MBPS_UNIT;
298 max_bw_value[i] = div_u64(maxrate->tc_maxrate[i],
300 max_bw_unit[i] = MLX5_GBPS_UNIT;
304 return mlx5_modify_port_ets_rate_limit(mdev, max_bw_value, max_bw_unit);
307 const struct dcbnl_rtnl_ops mlx5e_dcbnl_ops = {
308 .ieee_getets = mlx5e_dcbnl_ieee_getets,
309 .ieee_setets = mlx5e_dcbnl_ieee_setets,
310 .ieee_getmaxrate = mlx5e_dcbnl_ieee_getmaxrate,
311 .ieee_setmaxrate = mlx5e_dcbnl_ieee_setmaxrate,
312 .ieee_getpfc = mlx5e_dcbnl_ieee_getpfc,
313 .ieee_setpfc = mlx5e_dcbnl_ieee_setpfc,
314 .getdcbx = mlx5e_dcbnl_getdcbx,
315 .setdcbx = mlx5e_dcbnl_setdcbx,