Neerav Parikh | 4e3b35b | 2014-01-17 15:36:37 -0800 | [diff] [blame^] | 1 | /******************************************************************************* |
| 2 | * |
| 3 | * Intel Ethernet Controller XL710 Family Linux Driver |
| 4 | * Copyright(c) 2013 - 2014 Intel Corporation. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms and conditions of the GNU General Public License, |
| 8 | * version 2, as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 13 | * more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | * |
| 18 | * The full GNU General Public License is included in this distribution in |
| 19 | * the file called "COPYING". |
| 20 | * |
| 21 | * Contact Information: |
| 22 | * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> |
| 23 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| 24 | * |
| 25 | ******************************************************************************/ |
| 26 | |
| 27 | #ifdef CONFIG_I40E_DCB |
| 28 | #include "i40e.h" |
| 29 | #include <net/dcbnl.h> |
| 30 | |
| 31 | /** |
| 32 | * i40e_get_pfc_delay - retrieve PFC Link Delay |
| 33 | * @hw: pointer to hardware struct |
| 34 | * @delay: holds the PFC Link delay value |
| 35 | * |
| 36 | * Returns PFC Link Delay from the PRTDCB_GENC.PFCLDA |
| 37 | **/ |
| 38 | static void i40e_get_pfc_delay(struct i40e_hw *hw, u16 *delay) |
| 39 | { |
| 40 | u32 val; |
| 41 | |
| 42 | val = rd32(hw, I40E_PRTDCB_GENC); |
| 43 | *delay = (u16)(val & I40E_PRTDCB_GENC_PFCLDA_MASK >> |
| 44 | I40E_PRTDCB_GENC_PFCLDA_SHIFT); |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * i40e_dcbnl_ieee_getets - retrieve local IEEE ETS configuration |
| 49 | * @netdev: the corresponding netdev |
| 50 | * @ets: structure to hold the ETS information |
| 51 | * |
| 52 | * Returns local IEEE ETS configuration |
| 53 | **/ |
| 54 | static int i40e_dcbnl_ieee_getets(struct net_device *dev, |
| 55 | struct ieee_ets *ets) |
| 56 | { |
| 57 | struct i40e_pf *pf = i40e_netdev_to_pf(dev); |
| 58 | struct i40e_dcbx_config *dcbxcfg; |
| 59 | struct i40e_hw *hw = &pf->hw; |
| 60 | |
| 61 | if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)) |
| 62 | return -EINVAL; |
| 63 | |
| 64 | dcbxcfg = &hw->local_dcbx_config; |
| 65 | ets->willing = dcbxcfg->etscfg.willing; |
| 66 | ets->ets_cap = dcbxcfg->etscfg.maxtcs; |
| 67 | ets->cbs = dcbxcfg->etscfg.cbs; |
| 68 | memcpy(ets->tc_tx_bw, dcbxcfg->etscfg.tcbwtable, |
| 69 | sizeof(ets->tc_tx_bw)); |
| 70 | memcpy(ets->tc_rx_bw, dcbxcfg->etscfg.tcbwtable, |
| 71 | sizeof(ets->tc_rx_bw)); |
| 72 | memcpy(ets->tc_tsa, dcbxcfg->etscfg.tsatable, |
| 73 | sizeof(ets->tc_tsa)); |
| 74 | memcpy(ets->prio_tc, dcbxcfg->etscfg.prioritytable, |
| 75 | sizeof(ets->prio_tc)); |
| 76 | memcpy(ets->tc_reco_bw, dcbxcfg->etsrec.tcbwtable, |
| 77 | sizeof(ets->tc_reco_bw)); |
| 78 | memcpy(ets->tc_reco_tsa, dcbxcfg->etsrec.tsatable, |
| 79 | sizeof(ets->tc_reco_tsa)); |
| 80 | memcpy(ets->reco_prio_tc, dcbxcfg->etscfg.prioritytable, |
| 81 | sizeof(ets->reco_prio_tc)); |
| 82 | |
| 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * i40e_dcbnl_ieee_getpfc - retrieve local IEEE PFC configuration |
| 88 | * @netdev: the corresponding netdev |
| 89 | * @ets: structure to hold the PFC information |
| 90 | * |
| 91 | * Returns local IEEE PFC configuration |
| 92 | **/ |
| 93 | static int i40e_dcbnl_ieee_getpfc(struct net_device *dev, |
| 94 | struct ieee_pfc *pfc) |
| 95 | { |
| 96 | struct i40e_pf *pf = i40e_netdev_to_pf(dev); |
| 97 | struct i40e_dcbx_config *dcbxcfg; |
| 98 | struct i40e_hw *hw = &pf->hw; |
| 99 | int i; |
| 100 | |
| 101 | if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)) |
| 102 | return -EINVAL; |
| 103 | |
| 104 | dcbxcfg = &hw->local_dcbx_config; |
| 105 | pfc->pfc_cap = dcbxcfg->pfc.pfccap; |
| 106 | pfc->pfc_en = dcbxcfg->pfc.pfcenable; |
| 107 | pfc->mbc = dcbxcfg->pfc.mbc; |
| 108 | i40e_get_pfc_delay(hw, &pfc->delay); |
| 109 | |
| 110 | /* Get Requests/Indicatiosn */ |
| 111 | for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) { |
| 112 | pfc->requests[i] = pf->stats.priority_xoff_tx[i]; |
| 113 | pfc->indications[i] = pf->stats.priority_xoff_rx[i]; |
| 114 | } |
| 115 | |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | /** |
| 120 | * i40e_dcbnl_getdcbx - retrieve current DCBx capability |
| 121 | * @netdev: the corresponding netdev |
| 122 | * |
| 123 | * Returns DCBx capability features |
| 124 | **/ |
| 125 | static u8 i40e_dcbnl_getdcbx(struct net_device *dev) |
| 126 | { |
| 127 | struct i40e_pf *pf = i40e_netdev_to_pf(dev); |
| 128 | |
| 129 | return pf->dcbx_cap; |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * i40e_dcbnl_get_perm_hw_addr - MAC address used by DCBx |
| 134 | * @netdev: the corresponding netdev |
| 135 | * |
| 136 | * Returns the SAN MAC address used for LLDP exchange |
| 137 | **/ |
| 138 | static void i40e_dcbnl_get_perm_hw_addr(struct net_device *dev, |
| 139 | u8 *perm_addr) |
| 140 | { |
| 141 | struct i40e_pf *pf = i40e_netdev_to_pf(dev); |
| 142 | int i, j; |
| 143 | |
| 144 | memset(perm_addr, 0xff, MAX_ADDR_LEN); |
| 145 | |
| 146 | for (i = 0; i < dev->addr_len; i++) |
| 147 | perm_addr[i] = pf->hw.mac.perm_addr[i]; |
| 148 | |
| 149 | for (j = 0; j < dev->addr_len; j++, i++) |
| 150 | perm_addr[i] = pf->hw.mac.san_addr[j]; |
| 151 | } |
| 152 | |
| 153 | static const struct dcbnl_rtnl_ops dcbnl_ops = { |
| 154 | .ieee_getets = i40e_dcbnl_ieee_getets, |
| 155 | .ieee_getpfc = i40e_dcbnl_ieee_getpfc, |
| 156 | .getdcbx = i40e_dcbnl_getdcbx, |
| 157 | .getpermhwaddr = i40e_dcbnl_get_perm_hw_addr, |
| 158 | }; |
| 159 | |
| 160 | /** |
| 161 | * i40e_dcbnl_set_all - set all the apps and ieee data from DCBx config |
| 162 | * @vsi: the corresponding vsi |
| 163 | * |
| 164 | * Set up all the IEEE APPs in the DCBNL App Table and generate event for |
| 165 | * other settings |
| 166 | **/ |
| 167 | void i40e_dcbnl_set_all(struct i40e_vsi *vsi) |
| 168 | { |
| 169 | struct net_device *dev = vsi->netdev; |
| 170 | struct i40e_pf *pf = i40e_netdev_to_pf(dev); |
| 171 | struct i40e_dcbx_config *dcbxcfg; |
| 172 | struct i40e_hw *hw = &pf->hw; |
| 173 | struct dcb_app sapp; |
| 174 | u8 prio, tc_map; |
| 175 | int i; |
| 176 | |
| 177 | /* DCB not enabled */ |
| 178 | if (!(pf->flags & I40E_FLAG_DCB_ENABLED)) |
| 179 | return; |
| 180 | |
| 181 | dcbxcfg = &hw->local_dcbx_config; |
| 182 | |
| 183 | /* Set up all the App TLVs if DCBx is negotiated */ |
| 184 | for (i = 0; i < dcbxcfg->numapps; i++) { |
| 185 | prio = dcbxcfg->app[i].priority; |
| 186 | tc_map = (1 << dcbxcfg->etscfg.prioritytable[prio]); |
| 187 | |
| 188 | /* Add APP only if the TC is enabled for this VSI */ |
| 189 | if (tc_map & vsi->tc_config.enabled_tc) { |
| 190 | sapp.selector = dcbxcfg->app[i].selector; |
| 191 | sapp.protocol = dcbxcfg->app[i].protocolid; |
| 192 | sapp.priority = prio; |
| 193 | dcb_ieee_setapp(dev, &sapp); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | /* Notify user-space of the changes */ |
| 198 | dcbnl_ieee_notify(dev, RTM_SETDCB, DCB_CMD_IEEE_SET, 0, 0); |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * i40e_dcbnl_vsi_del_app - Delete APP for given VSI |
| 203 | * @vsi: the corresponding vsi |
| 204 | * @app: APP to delete |
| 205 | * |
| 206 | * Delete given APP from the DCBNL APP table for given |
| 207 | * VSI |
| 208 | **/ |
| 209 | static int i40e_dcbnl_vsi_del_app(struct i40e_vsi *vsi, |
| 210 | struct i40e_ieee_app_priority_table *app) |
| 211 | { |
| 212 | struct net_device *dev = vsi->netdev; |
| 213 | struct dcb_app sapp; |
| 214 | |
| 215 | if (!dev) |
| 216 | return -EINVAL; |
| 217 | |
| 218 | sapp.selector = app->selector; |
| 219 | sapp.protocol = app->protocolid; |
| 220 | sapp.priority = app->priority; |
| 221 | return dcb_ieee_delapp(dev, &sapp); |
| 222 | } |
| 223 | |
| 224 | /** |
| 225 | * i40e_dcbnl_del_app - Delete APP on all VSIs |
| 226 | * @pf: the corresponding pf |
| 227 | * @app: APP to delete |
| 228 | * |
| 229 | * Delete given APP from all the VSIs for given PF |
| 230 | **/ |
| 231 | static void i40e_dcbnl_del_app(struct i40e_pf *pf, |
| 232 | struct i40e_ieee_app_priority_table *app) |
| 233 | { |
| 234 | int v, err; |
| 235 | for (v = 0; v < pf->hw.func_caps.num_vsis; v++) { |
| 236 | if (pf->vsi[v] && pf->vsi[v]->netdev) { |
| 237 | err = i40e_dcbnl_vsi_del_app(pf->vsi[v], app); |
| 238 | if (err) |
| 239 | dev_info(&pf->pdev->dev, "%s: Failed deleting app for VSI seid=%d err=%d sel=%d proto=0x%x prio=%d\n", |
| 240 | __func__, pf->vsi[v]->seid, |
| 241 | err, app->selector, |
| 242 | app->protocolid, app->priority); |
| 243 | } |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | /** |
| 248 | * i40e_dcbnl_find_app - Search APP in given DCB config |
| 249 | * @cfg: DCBX configuration data |
| 250 | * @app: APP to search for |
| 251 | * |
| 252 | * Find given APP in the DCB configuration |
| 253 | **/ |
| 254 | static bool i40e_dcbnl_find_app(struct i40e_dcbx_config *cfg, |
| 255 | struct i40e_ieee_app_priority_table *app) |
| 256 | { |
| 257 | int i; |
| 258 | |
| 259 | for (i = 0; i < cfg->numapps; i++) { |
| 260 | if (app->selector == cfg->app[i].selector && |
| 261 | app->protocolid == cfg->app[i].protocolid && |
| 262 | app->priority == cfg->app[i].priority) |
| 263 | return true; |
| 264 | } |
| 265 | |
| 266 | return false; |
| 267 | } |
| 268 | |
| 269 | /** |
| 270 | * i40e_dcbnl_flush_apps - Delete all removed APPs |
| 271 | * @pf: the corresponding pf |
| 272 | * @new_cfg: new DCBX configuration data |
| 273 | * |
| 274 | * Find and delete all APPs that are not present in the passed |
| 275 | * DCB configuration |
| 276 | **/ |
| 277 | void i40e_dcbnl_flush_apps(struct i40e_pf *pf, |
| 278 | struct i40e_dcbx_config *new_cfg) |
| 279 | { |
| 280 | struct i40e_ieee_app_priority_table app; |
| 281 | struct i40e_dcbx_config *dcbxcfg; |
| 282 | struct i40e_hw *hw = &pf->hw; |
| 283 | int i; |
| 284 | |
| 285 | dcbxcfg = &hw->local_dcbx_config; |
| 286 | for (i = 0; i < dcbxcfg->numapps; i++) { |
| 287 | app = dcbxcfg->app[i]; |
| 288 | /* The APP is not available anymore delete it */ |
| 289 | if (!i40e_dcbnl_find_app(new_cfg, &app)) |
| 290 | i40e_dcbnl_del_app(pf, &app); |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * i40e_dcbnl_setup - DCBNL setup |
| 296 | * @vsi: the corresponding vsi |
| 297 | * |
| 298 | * Set up DCBNL ops and initial APP TLVs |
| 299 | **/ |
| 300 | void i40e_dcbnl_setup(struct i40e_vsi *vsi) |
| 301 | { |
| 302 | struct net_device *dev = vsi->netdev; |
| 303 | struct i40e_pf *pf = i40e_netdev_to_pf(dev); |
| 304 | |
| 305 | /* DCB not enabled */ |
| 306 | if (!(pf->flags & I40E_FLAG_DCB_ENABLED)) |
| 307 | return; |
| 308 | |
| 309 | /* Do not setup DCB NL ops for MFP mode */ |
| 310 | if (!(pf->flags & I40E_FLAG_MFP_ENABLED)) |
| 311 | dev->dcbnl_ops = &dcbnl_ops; |
| 312 | |
| 313 | /* Set initial IEEE DCB settings */ |
| 314 | i40e_dcbnl_set_all(vsi); |
| 315 | } |
| 316 | #endif /* CONFIG_I40E_DCB */ |