drivers/net/ethernet/intel/i40e/i40e_dcb_nl.c - linux - Git at Google

 /*******************************************************************************
  *
  * Intel Ethernet Controller XL710 Family Linux Driver
  * Copyright(c) 2013 - 2014 Intel Corporation.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
  * version 2, as published by the Free Software Foundation.
  *
  * This program is distributed in the hope it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  * more details.
  *
  * You should have received a copy of the GNU General Public License along
  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  * The full GNU General Public License is included in this distribution in
  * the file called "COPYING".
  *
  * Contact Information:
  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  *
  ******************************************************************************/

 #ifdef CONFIG_I40E_DCB
 #include "i40e.h"
 #include <net/dcbnl.h>

 /**
  * i40e_get_pfc_delay - retrieve PFC Link Delay
  * @hw: pointer to hardware struct
  * @delay: holds the PFC Link delay value
  *
  * Returns PFC Link Delay from the PRTDCB_GENC.PFCLDA
  **/
 static void i40e_get_pfc_delay(struct i40e_hw *hw, u16 *delay)
 {
 	u32 val;

 	val = rd32(hw, I40E_PRTDCB_GENC);
 	*delay = (u16)((val & I40E_PRTDCB_GENC_PFCLDA_MASK) >>
 		       I40E_PRTDCB_GENC_PFCLDA_SHIFT);
 }

 /**
  * i40e_dcbnl_ieee_getets - retrieve local IEEE ETS configuration
  * @netdev: the corresponding netdev
  * @ets: structure to hold the ETS information
  *
  * Returns local IEEE ETS configuration
  **/
 static int i40e_dcbnl_ieee_getets(struct net_device *dev,
 				  struct ieee_ets *ets)
 {
 	struct i40e_pf *pf = i40e_netdev_to_pf(dev);
 	struct i40e_dcbx_config *dcbxcfg;
 	struct i40e_hw *hw = &pf->hw;

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

 	dcbxcfg = &hw->local_dcbx_config;
 	ets->willing = dcbxcfg->etscfg.willing;
 	ets->ets_cap = dcbxcfg->etscfg.maxtcs;
 	ets->cbs = dcbxcfg->etscfg.cbs;
 	memcpy(ets->tc_tx_bw, dcbxcfg->etscfg.tcbwtable,
 		sizeof(ets->tc_tx_bw));
 	memcpy(ets->tc_rx_bw, dcbxcfg->etscfg.tcbwtable,
 		sizeof(ets->tc_rx_bw));
 	memcpy(ets->tc_tsa, dcbxcfg->etscfg.tsatable,
 		sizeof(ets->tc_tsa));
 	memcpy(ets->prio_tc, dcbxcfg->etscfg.prioritytable,
 		sizeof(ets->prio_tc));
 	memcpy(ets->tc_reco_bw, dcbxcfg->etsrec.tcbwtable,
 		sizeof(ets->tc_reco_bw));
 	memcpy(ets->tc_reco_tsa, dcbxcfg->etsrec.tsatable,
 		sizeof(ets->tc_reco_tsa));
 	memcpy(ets->reco_prio_tc, dcbxcfg->etscfg.prioritytable,
 		sizeof(ets->reco_prio_tc));

 	return 0;
 }

 /**
  * i40e_dcbnl_ieee_getpfc - retrieve local IEEE PFC configuration
  * @netdev: the corresponding netdev
  * @ets: structure to hold the PFC information
  *
  * Returns local IEEE PFC configuration
  **/
 static int i40e_dcbnl_ieee_getpfc(struct net_device *dev,
 				  struct ieee_pfc *pfc)
 {
 	struct i40e_pf *pf = i40e_netdev_to_pf(dev);
 	struct i40e_dcbx_config *dcbxcfg;
 	struct i40e_hw *hw = &pf->hw;
 	int i;

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

 	dcbxcfg = &hw->local_dcbx_config;
 	pfc->pfc_cap = dcbxcfg->pfc.pfccap;
 	pfc->pfc_en = dcbxcfg->pfc.pfcenable;
 	pfc->mbc = dcbxcfg->pfc.mbc;
 	i40e_get_pfc_delay(hw, &pfc->delay);

 	/* Get Requests/Indicatiosn */
 	for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
 		pfc->requests[i] = pf->stats.priority_xoff_tx[i];
 		pfc->indications[i] = pf->stats.priority_xoff_rx[i];
 	}

 	return 0;
 }

 /**
  * i40e_dcbnl_getdcbx - retrieve current DCBx capability
  * @netdev: the corresponding netdev
  *
  * Returns DCBx capability features
  **/
 static u8 i40e_dcbnl_getdcbx(struct net_device *dev)
 {
 	struct i40e_pf *pf = i40e_netdev_to_pf(dev);

 	return pf->dcbx_cap;
 }

 /**
  * i40e_dcbnl_get_perm_hw_addr - MAC address used by DCBx
  * @netdev: the corresponding netdev
  *
  * Returns the SAN MAC address used for LLDP exchange
  **/
 static void i40e_dcbnl_get_perm_hw_addr(struct net_device *dev,
 					u8 *perm_addr)
 {
 	struct i40e_pf *pf = i40e_netdev_to_pf(dev);
 	int i, j;

 	memset(perm_addr, 0xff, MAX_ADDR_LEN);

 	for (i = 0; i < dev->addr_len; i++)
 		perm_addr[i] = pf->hw.mac.perm_addr[i];

 	for (j = 0; j < dev->addr_len; j++, i++)
 		perm_addr[i] = pf->hw.mac.san_addr[j];
 }

 static const struct dcbnl_rtnl_ops dcbnl_ops = {
 	.ieee_getets	= i40e_dcbnl_ieee_getets,
 	.ieee_getpfc	= i40e_dcbnl_ieee_getpfc,
 	.getdcbx	= i40e_dcbnl_getdcbx,
 	.getpermhwaddr  = i40e_dcbnl_get_perm_hw_addr,
 };

 /**
  * i40e_dcbnl_set_all - set all the apps and ieee data from DCBx config
  * @vsi: the corresponding vsi
  *
  * Set up all the IEEE APPs in the DCBNL App Table and generate event for
  * other settings
  **/
 void i40e_dcbnl_set_all(struct i40e_vsi *vsi)
 {
 	struct net_device *dev = vsi->netdev;
 	struct i40e_pf *pf = i40e_netdev_to_pf(dev);
 	struct i40e_dcbx_config *dcbxcfg;
 	struct i40e_hw *hw = &pf->hw;
 	struct dcb_app sapp;
 	u8 prio, tc_map;
 	int i;

 	/* DCB not enabled */
 	if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
 		return;

 	/* MFP mode but not an iSCSI PF so return */
 	if ((pf->flags & I40E_FLAG_MFP_ENABLED) && !(pf->hw.func_caps.iscsi))
 		return;

 	dcbxcfg = &hw->local_dcbx_config;

 	/* Set up all the App TLVs if DCBx is negotiated */
 	for (i = 0; i < dcbxcfg->numapps; i++) {
 		prio = dcbxcfg->app[i].priority;
 		tc_map = BIT(dcbxcfg->etscfg.prioritytable[prio]);

 		/* Add APP only if the TC is enabled for this VSI */
 		if (tc_map & vsi->tc_config.enabled_tc) {
 			sapp.selector = dcbxcfg->app[i].selector;
 			sapp.protocol = dcbxcfg->app[i].protocolid;
 			sapp.priority = prio;
 			dcb_ieee_setapp(dev, &sapp);
 		}
 	}

 	/* Notify user-space of the changes */
 	dcbnl_ieee_notify(dev, RTM_SETDCB, DCB_CMD_IEEE_SET, 0, 0);
 }

 /**
  * i40e_dcbnl_vsi_del_app - Delete APP for given VSI
  * @vsi: the corresponding vsi
  * @app: APP to delete
  *
  * Delete given APP from the DCBNL APP table for given
  * VSI
  **/
 static int i40e_dcbnl_vsi_del_app(struct i40e_vsi *vsi,
 				  struct i40e_dcb_app_priority_table *app)
 {
 	struct net_device *dev = vsi->netdev;
 	struct dcb_app sapp;

 	if (!dev)
 		return -EINVAL;

 	sapp.selector = app->selector;
 	sapp.protocol = app->protocolid;
 	sapp.priority = app->priority;
 	return dcb_ieee_delapp(dev, &sapp);
 }

 /**
  * i40e_dcbnl_del_app - Delete APP on all VSIs
  * @pf: the corresponding PF
  * @app: APP to delete
  *
  * Delete given APP from all the VSIs for given PF
  **/
 static void i40e_dcbnl_del_app(struct i40e_pf *pf,
 			       struct i40e_dcb_app_priority_table *app)
 {
 	int v, err;

 	for (v = 0; v < pf->num_alloc_vsi; v++) {
 		if (pf->vsi[v] && pf->vsi[v]->netdev) {
 			err = i40e_dcbnl_vsi_del_app(pf->vsi[v], app);
 			dev_dbg(&pf->pdev->dev, "Deleting app for VSI seid=%d err=%d sel=%d proto=0x%x prio=%d\n",
 				pf->vsi[v]->seid, err, app->selector,
 				app->protocolid, app->priority);
 		}
 	}
 }

 /**
  * i40e_dcbnl_find_app - Search APP in given DCB config
  * @cfg: DCBX configuration data
  * @app: APP to search for
  *
  * Find given APP in the DCB configuration
  **/
 static bool i40e_dcbnl_find_app(struct i40e_dcbx_config *cfg,
 				struct i40e_dcb_app_priority_table *app)
 {
 	int i;

 	for (i = 0; i < cfg->numapps; i++) {
 		if (app->selector == cfg->app[i].selector &&
 		    app->protocolid == cfg->app[i].protocolid &&
 		    app->priority == cfg->app[i].priority)
 			return true;
 	}

 	return false;
 }

 /**
  * i40e_dcbnl_flush_apps - Delete all removed APPs
  * @pf: the corresponding PF
  * @old_cfg: old DCBX configuration data
  * @new_cfg: new DCBX configuration data
  *
  * Find and delete all APPs that are not present in the passed
  * DCB configuration
  **/
 void i40e_dcbnl_flush_apps(struct i40e_pf *pf,
 			   struct i40e_dcbx_config *old_cfg,
 			   struct i40e_dcbx_config *new_cfg)
 {
 	struct i40e_dcb_app_priority_table app;
 	int i;

 	/* MFP mode but not an iSCSI PF so return */
 	if ((pf->flags & I40E_FLAG_MFP_ENABLED) && !(pf->hw.func_caps.iscsi))
 		return;

 	for (i = 0; i < old_cfg->numapps; i++) {
 		app = old_cfg->app[i];
 		/* The APP is not available anymore delete it */
 		if (!i40e_dcbnl_find_app(new_cfg, &app))
 			i40e_dcbnl_del_app(pf, &app);
 	}
 }

 /**
  * i40e_dcbnl_setup - DCBNL setup
  * @vsi: the corresponding vsi
  *
  * Set up DCBNL ops and initial APP TLVs
  **/
 void i40e_dcbnl_setup(struct i40e_vsi *vsi)
 {
 	struct net_device *dev = vsi->netdev;
 	struct i40e_pf *pf = i40e_netdev_to_pf(dev);

 	/* Not DCB capable */
 	if (!(pf->flags & I40E_FLAG_DCB_CAPABLE))
 		return;

 	dev->dcbnl_ops = &dcbnl_ops;

 	/* Set initial IEEE DCB settings */
 	i40e_dcbnl_set_all(vsi);
 }
 #endif /* CONFIG_I40E_DCB */
	/*******************************************************************************
	*
	* Intel Ethernet Controller XL710 Family Linux Driver
	* Copyright(c) 2013 - 2014 Intel Corporation.
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms and conditions of the GNU General Public License,
	* version 2, as published by the Free Software Foundation.
	*
	* This program is distributed in the hope it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	* more details.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program. If not, see <http://www.gnu.org/licenses/>.
	*
	* The full GNU General Public License is included in this distribution in
	* the file called "COPYING".
	*
	* Contact Information:
	* e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	*
	******************************************************************************/

	#ifdef CONFIG_I40E_DCB
	#include "i40e.h"
	#include <net/dcbnl.h>

	/**
	* i40e_get_pfc_delay - retrieve PFC Link Delay
	* @hw: pointer to hardware struct
	* @delay: holds the PFC Link delay value
	*
	* Returns PFC Link Delay from the PRTDCB_GENC.PFCLDA
	**/
	static void i40e_get_pfc_delay(struct i40e_hw hw, u16 delay)
	{
	u32 val;

	val = rd32(hw, I40E_PRTDCB_GENC);
	*delay = (u16)((val & I40E_PRTDCB_GENC_PFCLDA_MASK) >>
	I40E_PRTDCB_GENC_PFCLDA_SHIFT);
	}

	/**
	* i40e_dcbnl_ieee_getets - retrieve local IEEE ETS configuration
	* @netdev: the corresponding netdev
	* @ets: structure to hold the ETS information
	*
	* Returns local IEEE ETS configuration
	**/
	static int i40e_dcbnl_ieee_getets(struct net_device *dev,
	struct ieee_ets *ets)
	{
	struct i40e_pf *pf = i40e_netdev_to_pf(dev);
	struct i40e_dcbx_config *dcbxcfg;
	struct i40e_hw *hw = &pf->hw;

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

	dcbxcfg = &hw->local_dcbx_config;
	ets->willing = dcbxcfg->etscfg.willing;
	ets->ets_cap = dcbxcfg->etscfg.maxtcs;
	ets->cbs = dcbxcfg->etscfg.cbs;
	memcpy(ets->tc_tx_bw, dcbxcfg->etscfg.tcbwtable,
	sizeof(ets->tc_tx_bw));
	memcpy(ets->tc_rx_bw, dcbxcfg->etscfg.tcbwtable,
	sizeof(ets->tc_rx_bw));
	memcpy(ets->tc_tsa, dcbxcfg->etscfg.tsatable,
	sizeof(ets->tc_tsa));
	memcpy(ets->prio_tc, dcbxcfg->etscfg.prioritytable,
	sizeof(ets->prio_tc));
	memcpy(ets->tc_reco_bw, dcbxcfg->etsrec.tcbwtable,
	sizeof(ets->tc_reco_bw));
	memcpy(ets->tc_reco_tsa, dcbxcfg->etsrec.tsatable,
	sizeof(ets->tc_reco_tsa));
	memcpy(ets->reco_prio_tc, dcbxcfg->etscfg.prioritytable,
	sizeof(ets->reco_prio_tc));

	return 0;
	}

	/**
	* i40e_dcbnl_ieee_getpfc - retrieve local IEEE PFC configuration
	* @netdev: the corresponding netdev
	* @ets: structure to hold the PFC information
	*
	* Returns local IEEE PFC configuration
	**/
	static int i40e_dcbnl_ieee_getpfc(struct net_device *dev,
	struct ieee_pfc *pfc)
	{
	struct i40e_pf *pf = i40e_netdev_to_pf(dev);
	struct i40e_dcbx_config *dcbxcfg;
	struct i40e_hw *hw = &pf->hw;
	int i;

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

	dcbxcfg = &hw->local_dcbx_config;
	pfc->pfc_cap = dcbxcfg->pfc.pfccap;
	pfc->pfc_en = dcbxcfg->pfc.pfcenable;
	pfc->mbc = dcbxcfg->pfc.mbc;
	i40e_get_pfc_delay(hw, &pfc->delay);

	/* Get Requests/Indicatiosn */
	for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
	pfc->requests[i] = pf->stats.priority_xoff_tx[i];
	pfc->indications[i] = pf->stats.priority_xoff_rx[i];
	}

	return 0;
	}

	/**
	* i40e_dcbnl_getdcbx - retrieve current DCBx capability
	* @netdev: the corresponding netdev
	*
	* Returns DCBx capability features
	**/
	static u8 i40e_dcbnl_getdcbx(struct net_device *dev)
	{
	struct i40e_pf *pf = i40e_netdev_to_pf(dev);

	return pf->dcbx_cap;
	}

	/**
	* i40e_dcbnl_get_perm_hw_addr - MAC address used by DCBx
	* @netdev: the corresponding netdev
	*
	* Returns the SAN MAC address used for LLDP exchange
	**/
	static void i40e_dcbnl_get_perm_hw_addr(struct net_device *dev,
	u8 *perm_addr)
	{
	struct i40e_pf *pf = i40e_netdev_to_pf(dev);
	int i, j;

	memset(perm_addr, 0xff, MAX_ADDR_LEN);

	for (i = 0; i < dev->addr_len; i++)
	perm_addr[i] = pf->hw.mac.perm_addr[i];

	for (j = 0; j < dev->addr_len; j++, i++)
	perm_addr[i] = pf->hw.mac.san_addr[j];
	}

	static const struct dcbnl_rtnl_ops dcbnl_ops = {
	.ieee_getets = i40e_dcbnl_ieee_getets,
	.ieee_getpfc = i40e_dcbnl_ieee_getpfc,
	.getdcbx = i40e_dcbnl_getdcbx,
	.getpermhwaddr = i40e_dcbnl_get_perm_hw_addr,
	};

	/**
	* i40e_dcbnl_set_all - set all the apps and ieee data from DCBx config
	* @vsi: the corresponding vsi
	*
	* Set up all the IEEE APPs in the DCBNL App Table and generate event for
	* other settings
	**/
	void i40e_dcbnl_set_all(struct i40e_vsi *vsi)
	{
	struct net_device *dev = vsi->netdev;
	struct i40e_pf *pf = i40e_netdev_to_pf(dev);
	struct i40e_dcbx_config *dcbxcfg;
	struct i40e_hw *hw = &pf->hw;
	struct dcb_app sapp;
	u8 prio, tc_map;
	int i;

	/* DCB not enabled */
	if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
	return;

	/* MFP mode but not an iSCSI PF so return */
	if ((pf->flags & I40E_FLAG_MFP_ENABLED) && !(pf->hw.func_caps.iscsi))
	return;

	dcbxcfg = &hw->local_dcbx_config;

	/* Set up all the App TLVs if DCBx is negotiated */
	for (i = 0; i < dcbxcfg->numapps; i++) {
	prio = dcbxcfg->app[i].priority;
	tc_map = BIT(dcbxcfg->etscfg.prioritytable[prio]);

	/* Add APP only if the TC is enabled for this VSI */
	if (tc_map & vsi->tc_config.enabled_tc) {
	sapp.selector = dcbxcfg->app[i].selector;
	sapp.protocol = dcbxcfg->app[i].protocolid;
	sapp.priority = prio;
	dcb_ieee_setapp(dev, &sapp);
	}
	}

	/* Notify user-space of the changes */
	dcbnl_ieee_notify(dev, RTM_SETDCB, DCB_CMD_IEEE_SET, 0, 0);
	}

	/**
	* i40e_dcbnl_vsi_del_app - Delete APP for given VSI
	* @vsi: the corresponding vsi
	* @app: APP to delete
	*
	* Delete given APP from the DCBNL APP table for given
	* VSI
	**/
	static int i40e_dcbnl_vsi_del_app(struct i40e_vsi *vsi,
	struct i40e_dcb_app_priority_table *app)
	{
	struct net_device *dev = vsi->netdev;
	struct dcb_app sapp;

	if (!dev)
	return -EINVAL;

	sapp.selector = app->selector;
	sapp.protocol = app->protocolid;
	sapp.priority = app->priority;
	return dcb_ieee_delapp(dev, &sapp);
	}

	/**
	* i40e_dcbnl_del_app - Delete APP on all VSIs
	* @pf: the corresponding PF
	* @app: APP to delete
	*
	* Delete given APP from all the VSIs for given PF
	**/
	static void i40e_dcbnl_del_app(struct i40e_pf *pf,
	struct i40e_dcb_app_priority_table *app)
	{
	int v, err;

	for (v = 0; v < pf->num_alloc_vsi; v++) {
	if (pf->vsi[v] && pf->vsi[v]->netdev) {
	err = i40e_dcbnl_vsi_del_app(pf->vsi[v], app);
	dev_dbg(&pf->pdev->dev, "Deleting app for VSI seid=%d err=%d sel=%d proto=0x%x prio=%d\n",
	pf->vsi[v]->seid, err, app->selector,
	app->protocolid, app->priority);
	}
	}
	}

	/**
	* i40e_dcbnl_find_app - Search APP in given DCB config
	* @cfg: DCBX configuration data
	* @app: APP to search for
	*
	* Find given APP in the DCB configuration
	**/
	static bool i40e_dcbnl_find_app(struct i40e_dcbx_config *cfg,
	struct i40e_dcb_app_priority_table *app)
	{
	int i;

	for (i = 0; i < cfg->numapps; i++) {
	if (app->selector == cfg->app[i].selector &&
	app->protocolid == cfg->app[i].protocolid &&
	app->priority == cfg->app[i].priority)
	return true;
	}

	return false;
	}

	/**
	* i40e_dcbnl_flush_apps - Delete all removed APPs
	* @pf: the corresponding PF
	* @old_cfg: old DCBX configuration data
	* @new_cfg: new DCBX configuration data
	*
	* Find and delete all APPs that are not present in the passed
	* DCB configuration
	**/
	void i40e_dcbnl_flush_apps(struct i40e_pf *pf,
	struct i40e_dcbx_config *old_cfg,
	struct i40e_dcbx_config *new_cfg)
	{
	struct i40e_dcb_app_priority_table app;
	int i;

	/* MFP mode but not an iSCSI PF so return */
	if ((pf->flags & I40E_FLAG_MFP_ENABLED) && !(pf->hw.func_caps.iscsi))
	return;

	for (i = 0; i < old_cfg->numapps; i++) {
	app = old_cfg->app[i];
	/* The APP is not available anymore delete it */
	if (!i40e_dcbnl_find_app(new_cfg, &app))
	i40e_dcbnl_del_app(pf, &app);
	}
	}

	/**
	* i40e_dcbnl_setup - DCBNL setup
	* @vsi: the corresponding vsi
	*
	* Set up DCBNL ops and initial APP TLVs
	**/
	void i40e_dcbnl_setup(struct i40e_vsi *vsi)
	{
	struct net_device *dev = vsi->netdev;
	struct i40e_pf *pf = i40e_netdev_to_pf(dev);

	/* Not DCB capable */
	if (!(pf->flags & I40E_FLAG_DCB_CAPABLE))
	return;

	dev->dcbnl_ops = &dcbnl_ops;

	/* Set initial IEEE DCB settings */
	i40e_dcbnl_set_all(vsi);
	}
	#endif /* CONFIG_I40E_DCB */