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linux/drivers/net/ethernet/intel/ice/ice_dcb_nl.c
Dave Ertman 6d39ea19b0 ice: Fix problems with DSCP QoS implementation 
The patch that implemented DSCP QoS implementation removed a
bandwidth check that was used to check for a specific condition
caused by some corner cases.  This check should not of been
removed.

The same patch also added a check for when the DCBx state could
be changed in relation to DSCP, but the check was erroneously
added nested in a check for CEE mode, which made the check useless.

Fix these problems by re-adding the bandwidth check and relocating
the DSCP mode check earlier in the function that changes DCBx state
in the driver.

Fixes: 2a87bd73e5 ("ice: Add DSCP support")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2021-12-07 13:21:01 -08:00

1097 lines
28 KiB
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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019, Intel Corporation. */
#include "ice.h"
#include "ice_dcb.h"
#include "ice_dcb_lib.h"
#include "ice_dcb_nl.h"
#include <net/dcbnl.h>
/**
* ice_dcbnl_devreset - perform enough of a ifdown/ifup to sync DCBNL info
* @netdev: device associated with interface that needs reset
*/
static void ice_dcbnl_devreset(struct net_device *netdev)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
while (ice_is_reset_in_progress(pf->state))
usleep_range(1000, 2000);
dev_close(netdev);
netdev_state_change(netdev);
dev_open(netdev, NULL);
netdev_state_change(netdev);
}
/**
* ice_dcbnl_getets - retrieve local ETS configuration
* @netdev: the relevant netdev
* @ets: struct to hold ETS configuration
*/
static int ice_dcbnl_getets(struct net_device *netdev, struct ieee_ets *ets)
{
struct ice_dcbx_cfg *dcbxcfg;
struct ice_pf *pf;
pf = ice_netdev_to_pf(netdev);
dcbxcfg = &pf->hw.port_info->qos_cfg.local_dcbx_cfg;
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.prio_table, 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.prio_table,
sizeof(ets->reco_prio_tc));
return 0;
}
/**
* ice_dcbnl_setets - set IEEE ETS configuration
* @netdev: pointer to relevant netdev
* @ets: struct to hold ETS configuration
*/
static int ice_dcbnl_setets(struct net_device *netdev, struct ieee_ets *ets)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_dcbx_cfg *new_cfg;
int bwcfg = 0, bwrec = 0;
int err, i;
if ((pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) ||
!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
return -EINVAL;
new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg;
mutex_lock(&pf->tc_mutex);
new_cfg->etscfg.willing = ets->willing;
new_cfg->etscfg.cbs = ets->cbs;
ice_for_each_traffic_class(i) {
new_cfg->etscfg.tcbwtable[i] = ets->tc_tx_bw[i];
bwcfg += ets->tc_tx_bw[i];
new_cfg->etscfg.tsatable[i] = ets->tc_tsa[i];
if (new_cfg->pfc_mode == ICE_QOS_MODE_VLAN) {
/* in DSCP mode up->tc mapping cannot change */
new_cfg->etscfg.prio_table[i] = ets->prio_tc[i];
new_cfg->etsrec.prio_table[i] = ets->reco_prio_tc[i];
}
new_cfg->etsrec.tcbwtable[i] = ets->tc_reco_bw[i];
bwrec += ets->tc_reco_bw[i];
new_cfg->etsrec.tsatable[i] = ets->tc_reco_tsa[i];
}
if (ice_dcb_bwchk(pf, new_cfg)) {
err = -EINVAL;
goto ets_out;
}
new_cfg->etscfg.maxtcs = pf->hw.func_caps.common_cap.maxtc;
if (!bwcfg)
new_cfg->etscfg.tcbwtable[0] = 100;
if (!bwrec)
new_cfg->etsrec.tcbwtable[0] = 100;
err = ice_pf_dcb_cfg(pf, new_cfg, true);
/* return of zero indicates new cfg applied */
if (err == ICE_DCB_HW_CHG_RST)
ice_dcbnl_devreset(netdev);
if (err == ICE_DCB_NO_HW_CHG)
err = ICE_DCB_HW_CHG_RST;
ets_out:
mutex_unlock(&pf->tc_mutex);
return err;
}
/**
* ice_dcbnl_getnumtcs - Get max number of traffic classes supported
* @dev: pointer to netdev struct
* @tcid: TC ID
* @num: total number of TCs supported by the adapter
*
* Return the total number of TCs supported
*/
static int
ice_dcbnl_getnumtcs(struct net_device *dev, int __always_unused tcid, u8 *num)
{
struct ice_pf *pf = ice_netdev_to_pf(dev);
if (!test_bit(ICE_FLAG_DCB_CAPABLE, pf->flags))
return -EINVAL;
*num = pf->hw.func_caps.common_cap.maxtc;
return 0;
}
/**
* ice_dcbnl_getdcbx - retrieve current DCBX capability
* @netdev: pointer to the netdev struct
*/
static u8 ice_dcbnl_getdcbx(struct net_device *netdev)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
return pf->dcbx_cap;
}
/**
* ice_dcbnl_setdcbx - set required DCBX capability
* @netdev: the corresponding netdev
* @mode: required mode
*/
static u8 ice_dcbnl_setdcbx(struct net_device *netdev, u8 mode)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_qos_cfg *qos_cfg;
/* if FW LLDP agent is running, DCBNL not allowed to change mode */
if (test_bit(ICE_FLAG_FW_LLDP_AGENT, pf->flags))
return ICE_DCB_NO_HW_CHG;
/* No support for LLD_MANAGED modes or CEE+IEEE */
if ((mode & DCB_CAP_DCBX_LLD_MANAGED) ||
((mode & DCB_CAP_DCBX_VER_IEEE) && (mode & DCB_CAP_DCBX_VER_CEE)) ||
!(mode & DCB_CAP_DCBX_HOST))
return ICE_DCB_NO_HW_CHG;
/* Already set to the given mode no change */
if (mode == pf->dcbx_cap)
return ICE_DCB_NO_HW_CHG;
qos_cfg = &pf->hw.port_info->qos_cfg;
/* DSCP configuration is not DCBx negotiated */
if (qos_cfg->local_dcbx_cfg.pfc_mode == ICE_QOS_MODE_DSCP)
return ICE_DCB_NO_HW_CHG;
pf->dcbx_cap = mode;
if (mode & DCB_CAP_DCBX_VER_CEE)
qos_cfg->local_dcbx_cfg.dcbx_mode = ICE_DCBX_MODE_CEE;
else
qos_cfg->local_dcbx_cfg.dcbx_mode = ICE_DCBX_MODE_IEEE;
dev_info(ice_pf_to_dev(pf), "DCBx mode = 0x%x\n", mode);
return ICE_DCB_HW_CHG_RST;
}
/**
* ice_dcbnl_get_perm_hw_addr - MAC address used by DCBX
* @netdev: pointer to netdev struct
* @perm_addr: buffer to return permanent MAC address
*/
static void ice_dcbnl_get_perm_hw_addr(struct net_device *netdev, u8 *perm_addr)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_port_info *pi = pf->hw.port_info;
int i, j;
memset(perm_addr, 0xff, MAX_ADDR_LEN);
for (i = 0; i < netdev->addr_len; i++)
perm_addr[i] = pi->mac.perm_addr[i];
for (j = 0; j < netdev->addr_len; j++, i++)
perm_addr[i] = pi->mac.perm_addr[j];
}
/**
* ice_get_pfc_delay - Retrieve PFC Link Delay
* @hw: pointer to HW struct
* @delay: holds the PFC Link Delay value
*/
static void ice_get_pfc_delay(struct ice_hw *hw, u16 *delay)
{
u32 val;
val = rd32(hw, PRTDCB_GENC);
*delay = (u16)((val & PRTDCB_GENC_PFCLDA_M) >> PRTDCB_GENC_PFCLDA_S);
}
/**
* ice_dcbnl_getpfc - retrieve local IEEE PFC config
* @netdev: pointer to netdev struct
* @pfc: struct to hold PFC info
*/
static int ice_dcbnl_getpfc(struct net_device *netdev, struct ieee_pfc *pfc)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_port_info *pi = pf->hw.port_info;
struct ice_dcbx_cfg *dcbxcfg;
int i;
dcbxcfg = &pi->qos_cfg.local_dcbx_cfg;
pfc->pfc_cap = dcbxcfg->pfc.pfccap;
pfc->pfc_en = dcbxcfg->pfc.pfcena;
pfc->mbc = dcbxcfg->pfc.mbc;
ice_get_pfc_delay(&pf->hw, &pfc->delay);
ice_for_each_traffic_class(i) {
pfc->requests[i] = pf->stats.priority_xoff_tx[i];
pfc->indications[i] = pf->stats.priority_xoff_rx[i];
}
return 0;
}
/**
* ice_dcbnl_setpfc - set local IEEE PFC config
* @netdev: pointer to relevant netdev
* @pfc: pointer to struct holding PFC config
*/
static int ice_dcbnl_setpfc(struct net_device *netdev, struct ieee_pfc *pfc)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_dcbx_cfg *new_cfg;
int err;
if ((pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) ||
!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
return -EINVAL;
mutex_lock(&pf->tc_mutex);
new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg;
if (pfc->pfc_cap)
new_cfg->pfc.pfccap = pfc->pfc_cap;
else
new_cfg->pfc.pfccap = pf->hw.func_caps.common_cap.maxtc;
new_cfg->pfc.pfcena = pfc->pfc_en;
err = ice_pf_dcb_cfg(pf, new_cfg, true);
if (err == ICE_DCB_HW_CHG_RST)
ice_dcbnl_devreset(netdev);
if (err == ICE_DCB_NO_HW_CHG)
err = ICE_DCB_HW_CHG_RST;
mutex_unlock(&pf->tc_mutex);
return err;
}
/**
* ice_dcbnl_get_pfc_cfg - Get CEE PFC config
* @netdev: pointer to netdev struct
* @prio: corresponding user priority
* @setting: the PFC setting for given priority
*/
static void
ice_dcbnl_get_pfc_cfg(struct net_device *netdev, int prio, u8 *setting)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_port_info *pi = pf->hw.port_info;
if ((pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) ||
!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
return;
if (prio >= ICE_MAX_USER_PRIORITY)
return;
*setting = (pi->qos_cfg.local_dcbx_cfg.pfc.pfcena >> prio) & 0x1;
dev_dbg(ice_pf_to_dev(pf), "Get PFC Config up=%d, setting=%d, pfcenable=0x%x\n",
prio, *setting, pi->qos_cfg.local_dcbx_cfg.pfc.pfcena);
}
/**
* ice_dcbnl_set_pfc_cfg - Set CEE PFC config
* @netdev: the corresponding netdev
* @prio: User Priority
* @set: PFC setting to apply
*/
static void ice_dcbnl_set_pfc_cfg(struct net_device *netdev, int prio, u8 set)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_dcbx_cfg *new_cfg;
if ((pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) ||
!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
return;
if (prio >= ICE_MAX_USER_PRIORITY)
return;
new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg;
new_cfg->pfc.pfccap = pf->hw.func_caps.common_cap.maxtc;
if (set)
new_cfg->pfc.pfcena |= BIT(prio);
else
new_cfg->pfc.pfcena &= ~BIT(prio);
dev_dbg(ice_pf_to_dev(pf), "Set PFC config UP:%d set:%d pfcena:0x%x\n",
prio, set, new_cfg->pfc.pfcena);
}
/**
* ice_dcbnl_getpfcstate - get CEE PFC mode
* @netdev: pointer to netdev struct
*/
static u8 ice_dcbnl_getpfcstate(struct net_device *netdev)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_port_info *pi = pf->hw.port_info;
/* Return enabled if any UP enabled for PFC */
if (pi->qos_cfg.local_dcbx_cfg.pfc.pfcena)
return 1;
return 0;
}
/**
* ice_dcbnl_getstate - get DCB enabled state
* @netdev: pointer to netdev struct
*/
static u8 ice_dcbnl_getstate(struct net_device *netdev)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
u8 state = 0;
state = test_bit(ICE_FLAG_DCB_CAPABLE, pf->flags);
dev_dbg(ice_pf_to_dev(pf), "DCB enabled state = %d\n", state);
return state;
}
/**
* ice_dcbnl_setstate - Set CEE DCB state
* @netdev: pointer to relevant netdev
* @state: state value to set
*/
static u8 ice_dcbnl_setstate(struct net_device *netdev, u8 state)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
if ((pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) ||
!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
return ICE_DCB_NO_HW_CHG;
/* Nothing to do */
if (!!state == test_bit(ICE_FLAG_DCB_ENA, pf->flags))
return ICE_DCB_NO_HW_CHG;
if (state) {
set_bit(ICE_FLAG_DCB_ENA, pf->flags);
memcpy(&pf->hw.port_info->qos_cfg.desired_dcbx_cfg,
&pf->hw.port_info->qos_cfg.local_dcbx_cfg,
sizeof(struct ice_dcbx_cfg));
} else {
clear_bit(ICE_FLAG_DCB_ENA, pf->flags);
}
return ICE_DCB_HW_CHG;
}
/**
* ice_dcbnl_get_pg_tc_cfg_tx - get CEE PG Tx config
* @netdev: pointer to netdev struct
* @prio: the corresponding user priority
* @prio_type: traffic priority type
* @pgid: the BW group ID the traffic class belongs to
* @bw_pct: BW percentage for the corresponding BWG
* @up_map: prio mapped to corresponding TC
*/
static void
ice_dcbnl_get_pg_tc_cfg_tx(struct net_device *netdev, int prio,
u8 __always_unused *prio_type, u8 *pgid,
u8 __always_unused *bw_pct,
u8 __always_unused *up_map)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_port_info *pi = pf->hw.port_info;
if ((pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) ||
!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
return;
if (prio >= ICE_MAX_USER_PRIORITY)
return;
*pgid = pi->qos_cfg.local_dcbx_cfg.etscfg.prio_table[prio];
dev_dbg(ice_pf_to_dev(pf), "Get PG config prio=%d tc=%d\n", prio,
*pgid);
}
/**
* ice_dcbnl_set_pg_tc_cfg_tx - set CEE PG Tx config
* @netdev: pointer to relevant netdev
* @tc: the corresponding traffic class
* @prio_type: the traffic priority type
* @bwg_id: the BW group ID the TC belongs to
* @bw_pct: the BW perventage for the BWG
* @up_map: prio mapped to corresponding TC
*/
static void
ice_dcbnl_set_pg_tc_cfg_tx(struct net_device *netdev, int tc,
u8 __always_unused prio_type,
u8 __always_unused bwg_id,
u8 __always_unused bw_pct, u8 up_map)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_dcbx_cfg *new_cfg;
int i;
if ((pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) ||
!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
return;
if (tc >= ICE_MAX_TRAFFIC_CLASS)
return;
new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg;
/* prio_type, bwg_id and bw_pct per UP are not supported */
ice_for_each_traffic_class(i) {
if (up_map & BIT(i))
new_cfg->etscfg.prio_table[i] = tc;
}
new_cfg->etscfg.tsatable[tc] = ICE_IEEE_TSA_ETS;
}
/**
* ice_dcbnl_get_pg_bwg_cfg_tx - Get CEE PGBW config
* @netdev: pointer to the netdev struct
* @pgid: corresponding traffic class
* @bw_pct: the BW percentage for the corresponding TC
*/
static void
ice_dcbnl_get_pg_bwg_cfg_tx(struct net_device *netdev, int pgid, u8 *bw_pct)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_port_info *pi = pf->hw.port_info;
if ((pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) ||
!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
return;
if (pgid >= ICE_MAX_TRAFFIC_CLASS)
return;
*bw_pct = pi->qos_cfg.local_dcbx_cfg.etscfg.tcbwtable[pgid];
dev_dbg(ice_pf_to_dev(pf), "Get PG BW config tc=%d bw_pct=%d\n",
pgid, *bw_pct);
}
/**
* ice_dcbnl_set_pg_bwg_cfg_tx - set CEE PG Tx BW config
* @netdev: the corresponding netdev
* @pgid: Correspongind traffic class
* @bw_pct: the BW percentage for the specified TC
*/
static void
ice_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int pgid, u8 bw_pct)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_dcbx_cfg *new_cfg;
if ((pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) ||
!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
return;
if (pgid >= ICE_MAX_TRAFFIC_CLASS)
return;
new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg;
new_cfg->etscfg.tcbwtable[pgid] = bw_pct;
}
/**
* ice_dcbnl_get_pg_tc_cfg_rx - Get CEE PG Rx config
* @netdev: pointer to netdev struct
* @prio: the corresponding user priority
* @prio_type: the traffic priority type
* @pgid: the PG ID
* @bw_pct: the BW percentage for the corresponding BWG
* @up_map: prio mapped to corresponding TC
*/
static void
ice_dcbnl_get_pg_tc_cfg_rx(struct net_device *netdev, int prio,
u8 __always_unused *prio_type, u8 *pgid,
u8 __always_unused *bw_pct,
u8 __always_unused *up_map)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_port_info *pi = pf->hw.port_info;
if ((pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) ||
!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
return;
if (prio >= ICE_MAX_USER_PRIORITY)
return;
*pgid = pi->qos_cfg.local_dcbx_cfg.etscfg.prio_table[prio];
}
/**
* ice_dcbnl_set_pg_tc_cfg_rx
* @netdev: relevant netdev struct
* @prio: corresponding user priority
* @prio_type: the traffic priority type
* @pgid: the PG ID
* @bw_pct: BW percentage for corresponding BWG
* @up_map: prio mapped to corresponding TC
*
* lldpad requires this function pointer to be non-NULL to complete CEE config.
*/
static void
ice_dcbnl_set_pg_tc_cfg_rx(struct net_device *netdev,
int __always_unused prio,
u8 __always_unused prio_type,
u8 __always_unused pgid,
u8 __always_unused bw_pct,
u8 __always_unused up_map)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
dev_dbg(ice_pf_to_dev(pf), "Rx TC PG Config Not Supported.\n");
}
/**
* ice_dcbnl_get_pg_bwg_cfg_rx - Get CEE PG BW Rx config
* @netdev: pointer to netdev struct
* @pgid: the corresponding traffic class
* @bw_pct: the BW percentage for the corresponding TC
*/
static void
ice_dcbnl_get_pg_bwg_cfg_rx(struct net_device *netdev, int __always_unused pgid,
u8 *bw_pct)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
if ((pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) ||
!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
return;
*bw_pct = 0;
}
/**
* ice_dcbnl_set_pg_bwg_cfg_rx
* @netdev: the corresponding netdev
* @pgid: corresponding TC
* @bw_pct: BW percentage for given TC
*
* lldpad requires this function pointer to be non-NULL to complete CEE config.
*/
static void
ice_dcbnl_set_pg_bwg_cfg_rx(struct net_device *netdev, int __always_unused pgid,
u8 __always_unused bw_pct)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
dev_dbg(ice_pf_to_dev(pf), "Rx BWG PG Config Not Supported.\n");
}
/**
* ice_dcbnl_get_cap - Get DCBX capabilities of adapter
* @netdev: pointer to netdev struct
* @capid: the capability type
* @cap: the capability value
*/
static u8 ice_dcbnl_get_cap(struct net_device *netdev, int capid, u8 *cap)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
if (!(test_bit(ICE_FLAG_DCB_CAPABLE, pf->flags)))
return ICE_DCB_NO_HW_CHG;
switch (capid) {
case DCB_CAP_ATTR_PG:
*cap = true;
break;
case DCB_CAP_ATTR_PFC:
*cap = true;
break;
case DCB_CAP_ATTR_UP2TC:
*cap = false;
break;
case DCB_CAP_ATTR_PG_TCS:
*cap = 0x80;
break;
case DCB_CAP_ATTR_PFC_TCS:
*cap = 0x80;
break;
case DCB_CAP_ATTR_GSP:
*cap = false;
break;
case DCB_CAP_ATTR_BCN:
*cap = false;
break;
case DCB_CAP_ATTR_DCBX:
*cap = pf->dcbx_cap;
break;
default:
*cap = false;
break;
}
dev_dbg(ice_pf_to_dev(pf), "DCBX Get Capability cap=%d capval=0x%x\n",
capid, *cap);
return 0;
}
/**
* ice_dcbnl_getapp - get CEE APP
* @netdev: pointer to netdev struct
* @idtype: the App selector
* @id: the App ethtype or port number
*/
static int ice_dcbnl_getapp(struct net_device *netdev, u8 idtype, u16 id)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct dcb_app app = {
.selector = idtype,
.protocol = id,
};
if ((pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) ||
!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
return -EINVAL;
return dcb_getapp(netdev, &app);
}
/**
* ice_dcbnl_find_app - Search for APP in given DCB config
* @cfg: struct to hold DCBX config
* @app: struct to hold app data to look for
*/
static bool
ice_dcbnl_find_app(struct ice_dcbx_cfg *cfg,
struct ice_dcb_app_priority_table *app)
{
unsigned int i;
for (i = 0; i < cfg->numapps; i++) {
if (app->selector == cfg->app[i].selector &&
app->prot_id == cfg->app[i].prot_id &&
app->priority == cfg->app[i].priority)
return true;
}
return false;
}
#define ICE_BYTES_PER_DSCP_VAL 8
/**
* ice_dcbnl_setapp - set local IEEE App config
* @netdev: relevant netdev struct
* @app: struct to hold app config info
*/
static int ice_dcbnl_setapp(struct net_device *netdev, struct dcb_app *app)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_dcb_app_priority_table new_app;
struct ice_dcbx_cfg *old_cfg, *new_cfg;
u8 max_tc;
int ret;
/* ONLY DSCP APP TLVs have operational significance */
if (app->selector != IEEE_8021QAZ_APP_SEL_DSCP)
return -EINVAL;
/* only allow APP TLVs in SW Mode */
if (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) {
netdev_err(netdev, "can't do DSCP QoS when FW DCB agent active\n");
return -EINVAL;
}
if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
return -EINVAL;
if (!ice_is_feature_supported(pf, ICE_F_DSCP))
return -EOPNOTSUPP;
if (app->protocol >= ICE_DSCP_NUM_VAL) {
netdev_err(netdev, "DSCP value 0x%04X out of range\n",
app->protocol);
return -EINVAL;
}
max_tc = pf->hw.func_caps.common_cap.maxtc;
if (app->priority >= max_tc) {
netdev_err(netdev, "TC %d out of range, max TC %d\n",
app->priority, max_tc);
return -EINVAL;
}
/* grab TC mutex */
mutex_lock(&pf->tc_mutex);
new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg;
old_cfg = &pf->hw.port_info->qos_cfg.local_dcbx_cfg;
ret = dcb_ieee_setapp(netdev, app);
if (ret)
goto setapp_out;
if (test_and_set_bit(app->protocol, new_cfg->dscp_mapped)) {
netdev_err(netdev, "DSCP value 0x%04X already user mapped\n",
app->protocol);
ret = dcb_ieee_delapp(netdev, app);
if (ret)
netdev_err(netdev, "Failed to delete re-mapping TLV\n");
ret = -EINVAL;
goto setapp_out;
}
new_app.selector = app->selector;
new_app.prot_id = app->protocol;
new_app.priority = app->priority;
/* If port is not in DSCP mode, need to set */
if (old_cfg->pfc_mode == ICE_QOS_MODE_VLAN) {
int i, j;
/* set DSCP mode */
ret = ice_aq_set_pfc_mode(&pf->hw, ICE_AQC_PFC_DSCP_BASED_PFC,
NULL);
if (ret) {
netdev_err(netdev, "Failed to set DSCP PFC mode %d\n",
ret);
goto setapp_out;
}
netdev_info(netdev, "Switched QoS to L3 DSCP mode\n");
new_cfg->pfc_mode = ICE_QOS_MODE_DSCP;
/* set default DSCP QoS values */
new_cfg->etscfg.willing = 0;
new_cfg->pfc.pfccap = max_tc;
new_cfg->pfc.willing = 0;
for (i = 0; i < max_tc; i++)
for (j = 0; j < ICE_BYTES_PER_DSCP_VAL; j++) {
int dscp, offset;
dscp = (i * max_tc) + j;
offset = max_tc * ICE_BYTES_PER_DSCP_VAL;
new_cfg->dscp_map[dscp] = i;
/* if less that 8 TCs supported */
if (max_tc < ICE_MAX_TRAFFIC_CLASS)
new_cfg->dscp_map[dscp + offset] = i;
}
new_cfg->etscfg.tcbwtable[0] = 100;
new_cfg->etscfg.tsatable[0] = ICE_IEEE_TSA_ETS;
new_cfg->etscfg.prio_table[0] = 0;
for (i = 1; i < max_tc; i++) {
new_cfg->etscfg.tcbwtable[i] = 0;
new_cfg->etscfg.tsatable[i] = ICE_IEEE_TSA_ETS;
new_cfg->etscfg.prio_table[i] = i;
}
} /* end of switching to DSCP mode */
/* apply new mapping for this DSCP value */
new_cfg->dscp_map[app->protocol] = app->priority;
new_cfg->app[new_cfg->numapps++] = new_app;
ret = ice_pf_dcb_cfg(pf, new_cfg, true);
/* return of zero indicates new cfg applied */
if (ret == ICE_DCB_HW_CHG_RST)
ice_dcbnl_devreset(netdev);
else
ret = ICE_DCB_NO_HW_CHG;
setapp_out:
mutex_unlock(&pf->tc_mutex);
return ret;
}
/**
* ice_dcbnl_delapp - Delete local IEEE App config
* @netdev: relevant netdev
* @app: struct to hold app too delete
*
* Will not delete first application required by the FW
*/
static int ice_dcbnl_delapp(struct net_device *netdev, struct dcb_app *app)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_dcbx_cfg *old_cfg, *new_cfg;
unsigned int i, j;
int ret = 0;
if (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) {
netdev_err(netdev, "can't delete DSCP netlink app when FW DCB agent is active\n");
return -EINVAL;
}
mutex_lock(&pf->tc_mutex);
old_cfg = &pf->hw.port_info->qos_cfg.local_dcbx_cfg;
ret = dcb_ieee_delapp(netdev, app);
if (ret)
goto delapp_out;
new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg;
for (i = 0; i < new_cfg->numapps; i++) {
if (app->selector == new_cfg->app[i].selector &&
app->protocol == new_cfg->app[i].prot_id &&
app->priority == new_cfg->app[i].priority) {
new_cfg->app[i].selector = 0;
new_cfg->app[i].prot_id = 0;
new_cfg->app[i].priority = 0;
break;
}
}
/* Did not find DCB App */
if (i == new_cfg->numapps) {
ret = -EINVAL;
goto delapp_out;
}
new_cfg->numapps--;
for (j = i; j < new_cfg->numapps; j++) {
new_cfg->app[j].selector = old_cfg->app[j + 1].selector;
new_cfg->app[j].prot_id = old_cfg->app[j + 1].prot_id;
new_cfg->app[j].priority = old_cfg->app[j + 1].priority;
}
/* if not a DSCP APP TLV or DSCP is not supported, we are done */
if (app->selector != IEEE_8021QAZ_APP_SEL_DSCP ||
!ice_is_feature_supported(pf, ICE_F_DSCP)) {
ret = ICE_DCB_HW_CHG;
goto delapp_out;
}
/* if DSCP TLV, then need to address change in mapping */
clear_bit(app->protocol, new_cfg->dscp_mapped);
/* remap this DSCP value to default value */
new_cfg->dscp_map[app->protocol] = app->protocol %
ICE_BYTES_PER_DSCP_VAL;
/* if the last DSCP mapping just got deleted, need to switch
* to L2 VLAN QoS mode
*/
if (bitmap_empty(new_cfg->dscp_mapped, ICE_DSCP_NUM_VAL) &&
new_cfg->pfc_mode == ICE_QOS_MODE_DSCP) {
ret = ice_aq_set_pfc_mode(&pf->hw,
ICE_AQC_PFC_VLAN_BASED_PFC,
NULL);
if (ret) {
netdev_info(netdev, "Failed to set VLAN PFC mode %d\n",
ret);
goto delapp_out;
}
netdev_info(netdev, "Switched QoS to L2 VLAN mode\n");
new_cfg->pfc_mode = ICE_QOS_MODE_VLAN;
ret = ice_dcb_sw_dflt_cfg(pf, true, true);
} else {
ret = ice_pf_dcb_cfg(pf, new_cfg, true);
}
/* return of ICE_DCB_HW_CHG_RST indicates new cfg applied
* and reset needs to be performed
*/
if (ret == ICE_DCB_HW_CHG_RST)
ice_dcbnl_devreset(netdev);
/* if the change was not siginificant enough to actually call
* the reconfiguration flow, we still need to tell caller that
* their request was successfully handled
*/
if (ret == ICE_DCB_NO_HW_CHG)
ret = ICE_DCB_HW_CHG;
delapp_out:
mutex_unlock(&pf->tc_mutex);
return ret;
}
/**
* ice_dcbnl_cee_set_all - Commit CEE DCB settings to HW
* @netdev: the corresponding netdev
*/
static u8 ice_dcbnl_cee_set_all(struct net_device *netdev)
{
struct ice_pf *pf = ice_netdev_to_pf(netdev);
struct ice_dcbx_cfg *new_cfg;
int err;
if ((pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED) ||
!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
return ICE_DCB_NO_HW_CHG;
new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg;
mutex_lock(&pf->tc_mutex);
err = ice_pf_dcb_cfg(pf, new_cfg, true);
mutex_unlock(&pf->tc_mutex);
return (err != ICE_DCB_HW_CHG_RST) ? ICE_DCB_NO_HW_CHG : err;
}
static const struct dcbnl_rtnl_ops dcbnl_ops = {
/* IEEE 802.1Qaz std */
.ieee_getets = ice_dcbnl_getets,
.ieee_setets = ice_dcbnl_setets,
.ieee_getpfc = ice_dcbnl_getpfc,
.ieee_setpfc = ice_dcbnl_setpfc,
.ieee_setapp = ice_dcbnl_setapp,
.ieee_delapp = ice_dcbnl_delapp,
/* CEE std */
.getstate = ice_dcbnl_getstate,
.setstate = ice_dcbnl_setstate,
.getpermhwaddr = ice_dcbnl_get_perm_hw_addr,
.setpgtccfgtx = ice_dcbnl_set_pg_tc_cfg_tx,
.setpgbwgcfgtx = ice_dcbnl_set_pg_bwg_cfg_tx,
.setpgtccfgrx = ice_dcbnl_set_pg_tc_cfg_rx,
.setpgbwgcfgrx = ice_dcbnl_set_pg_bwg_cfg_rx,
.getpgtccfgtx = ice_dcbnl_get_pg_tc_cfg_tx,
.getpgbwgcfgtx = ice_dcbnl_get_pg_bwg_cfg_tx,
.getpgtccfgrx = ice_dcbnl_get_pg_tc_cfg_rx,
.getpgbwgcfgrx = ice_dcbnl_get_pg_bwg_cfg_rx,
.setpfccfg = ice_dcbnl_set_pfc_cfg,
.getpfccfg = ice_dcbnl_get_pfc_cfg,
.setall = ice_dcbnl_cee_set_all,
.getcap = ice_dcbnl_get_cap,
.getnumtcs = ice_dcbnl_getnumtcs,
.getpfcstate = ice_dcbnl_getpfcstate,
.getapp = ice_dcbnl_getapp,
/* DCBX configuration */
.getdcbx = ice_dcbnl_getdcbx,
.setdcbx = ice_dcbnl_setdcbx,
};
/**
* ice_dcbnl_set_all - set all the apps and ieee data from DCBX config
* @vsi: pointer to VSI struct
*/
void ice_dcbnl_set_all(struct ice_vsi *vsi)
{
struct net_device *netdev = vsi->netdev;
struct ice_dcbx_cfg *dcbxcfg;
struct ice_port_info *pi;
struct dcb_app sapp;
struct ice_pf *pf;
unsigned int i;
if (!netdev)
return;
pf = ice_netdev_to_pf(netdev);
pi = pf->hw.port_info;
/* SW DCB taken care of by SW Default Config */
if (pf->dcbx_cap & DCB_CAP_DCBX_HOST)
return;
/* DCB not enabled */
if (!test_bit(ICE_FLAG_DCB_ENA, pf->flags))
return;
dcbxcfg = &pi->qos_cfg.local_dcbx_cfg;
for (i = 0; i < dcbxcfg->numapps; i++) {
u8 prio, tc_map;
prio = dcbxcfg->app[i].priority;
tc_map = BIT(dcbxcfg->etscfg.prio_table[prio]);
/* Add APP only if the TC is enabled for this VSI */
if (tc_map & vsi->tc_cfg.ena_tc) {
sapp.selector = dcbxcfg->app[i].selector;
sapp.protocol = dcbxcfg->app[i].prot_id;
sapp.priority = prio;
dcb_ieee_setapp(netdev, &sapp);
}
}
/* Notify user-space of the changes */
dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, 0, 0);
}
/**
* ice_dcbnl_vsi_del_app - Delete APP on all VSIs
* @vsi: pointer to the main VSI
* @app: APP to delete
*
* Delete given APP from all the VSIs for given PF
*/
static void
ice_dcbnl_vsi_del_app(struct ice_vsi *vsi,
struct ice_dcb_app_priority_table *app)
{
struct dcb_app sapp;
int err;
sapp.selector = app->selector;
sapp.protocol = app->prot_id;
sapp.priority = app->priority;
err = ice_dcbnl_delapp(vsi->netdev, &sapp);
dev_dbg(ice_pf_to_dev(vsi->back), "Deleting app for VSI idx=%d err=%d sel=%d proto=0x%x, prio=%d\n",
vsi->idx, err, app->selector, app->prot_id, app->priority);
}
/**
* ice_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
ice_dcbnl_flush_apps(struct ice_pf *pf, struct ice_dcbx_cfg *old_cfg,
struct ice_dcbx_cfg *new_cfg)
{
struct ice_vsi *main_vsi = ice_get_main_vsi(pf);
unsigned int i;
if (!main_vsi)
return;
for (i = 0; i < old_cfg->numapps; i++) {
struct ice_dcb_app_priority_table app = old_cfg->app[i];
/* The APP is not available anymore delete it */
if (!ice_dcbnl_find_app(new_cfg, &app))
ice_dcbnl_vsi_del_app(main_vsi, &app);
}
}
/**
* ice_dcbnl_setup - setup DCBNL
* @vsi: VSI to get associated netdev from
*/
void ice_dcbnl_setup(struct ice_vsi *vsi)
{
struct net_device *netdev = vsi->netdev;
struct ice_pf *pf;
pf = ice_netdev_to_pf(netdev);
if (!test_bit(ICE_FLAG_DCB_CAPABLE, pf->flags))
return;
netdev->dcbnl_ops = &dcbnl_ops;
ice_dcbnl_set_all(vsi);
}
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