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ice: Implement aRFS 

Enable accelerated Receive Flow Steering (aRFS). It is used to steer Rx
flows to a specific queue. This functionality is triggered by the network
stack through ndo_rx_flow_steer and requires Flow Director (ntuple on) to
function.

The fltr_info is used to add/remove/update flow rules in the HW, the
fltr_state is used to determine what to do with the filter with respect
to HW and/or SW, and the flow_id is used in co-ordination with the
network stack.

The work for aRFS is split into two paths: the ndo_rx_flow_steer
operation and the ice_service_task. The former is where the kernel hands
us an Rx SKB among other items to setup aRFS and the latter is where
the driver adds/updates/removes filter rules from HW and updates filter
state.

In the Rx path the following things can happen:
        1. New aRFS entries are added to the hash table and the state is
           set to ICE_ARFS_INACTIVE so the filter can be updated in HW
           by the ice_service_task path.
        2. aRFS entries have their Rx Queue updated if we receive a
           pre-existing flow_id and the filter state is ICE_ARFS_ACTIVE.
           The state is set to ICE_ARFS_INACTIVE so the filter can be
           updated in HW by the ice_service_task path.
        3. aRFS entries marked as ICE_ARFS_TODEL are deleted

In the ice_service_task path the following things can happen:
        1. New aRFS entries marked as ICE_ARFS_INACTIVE are added or
           updated in HW.
           and their state is updated to ICE_ARFS_ACTIVE.
        2. aRFS entries are deleted from HW and their state is updated
           to ICE_ARFS_TODEL.

Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Signed-off-by: Madhu Chittim <madhu.chittim@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Brett Creeley 2020-05-11 18:01:46 -07:00 committed by Jeff Kirsher
parent 83af003951
commit 28bf26724f
7 changed files with 805 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/intel/ice/Makefile
View File

@ -26,4 +26,5 @@ ice-y := ice_main.o \
ice_ethtool.o
ice-$(CONFIG_PCI_IOV) += ice_virtchnl_pf.o ice_sriov.o
ice-$(CONFIG_DCB) += ice_dcb.o ice_dcb_nl.o ice_dcb_lib.o
ice-$(CONFIG_RFS_ACCEL) += ice_arfs.o
ice-$(CONFIG_XDP_SOCKETS) += ice_xsk.o

14
drivers/net/ethernet/intel/ice/ice.h
View File

@ -34,6 +34,7 @@
#include <linux/ctype.h>
#include <linux/bpf.h>
#include <linux/avf/virtchnl.h>
#include <linux/cpu_rmap.h>
#include <net/devlink.h>
#include <net/ipv6.h>
#include <net/xdp_sock.h>
@ -52,6 +53,7 @@
#include "ice_sriov.h"
#include "ice_fdir.h"
#include "ice_xsk.h"
#include "ice_arfs.h"
extern const char ice_drv_ver[];
#define ICE_BAR0 0
@ -271,6 +273,14 @@ struct ice_vsi {
u8 *rss_lut_user; /* User configured lookup table entries */
u8 rss_lut_type; /* used to configure Get/Set RSS LUT AQ call */
/* aRFS members only allocated for the PF VSI */
#define ICE_MAX_ARFS_LIST 1024
#define ICE_ARFS_LST_MASK (ICE_MAX_ARFS_LIST - 1)
struct hlist_head *arfs_fltr_list;
struct ice_arfs_active_fltr_cntrs *arfs_fltr_cntrs;
spinlock_t arfs_lock; /* protects aRFS hash table and filter state */
atomic_t *arfs_last_fltr_id;
u16 max_frame;
u16 rx_buf_len;
@ -558,6 +568,9 @@ int ice_schedule_reset(struct ice_pf *pf, enum ice_reset_req reset);
void ice_print_link_msg(struct ice_vsi *vsi, bool isup);
const char *ice_stat_str(enum ice_status stat_err);
const char *ice_aq_str(enum ice_aq_err aq_err);
int
ice_fdir_write_fltr(struct ice_pf *pf, struct ice_fdir_fltr *input, bool add,
bool is_tun);
void ice_vsi_manage_fdir(struct ice_vsi *vsi, bool ena);
int ice_add_fdir_ethtool(struct ice_vsi *vsi, struct ethtool_rxnfc *cmd);
int ice_del_fdir_ethtool(struct ice_vsi *vsi, struct ethtool_rxnfc *cmd);
@ -571,5 +584,6 @@ void ice_fdir_replay_fltrs(struct ice_pf *pf);
int ice_fdir_create_dflt_rules(struct ice_pf *pf);
int ice_open(struct net_device *netdev);
int ice_stop(struct net_device *netdev);
void ice_service_task_schedule(struct ice_pf *pf);
#endif /* _ICE_H_ */

663
drivers/net/ethernet/intel/ice/ice_arfs.c Normal file
View File

@ -0,0 +1,663 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2018-2020, Intel Corporation. */
#include "ice.h"
/**
* ice_is_arfs_active - helper to check is aRFS is active
* @vsi: VSI to check
*/
static bool ice_is_arfs_active(struct ice_vsi *vsi)
{
return !!vsi->arfs_fltr_list;
}
/**
* ice_is_arfs_using_perfect_flow - check if aRFS has active perfect filters
* @hw: pointer to the HW structure
* @flow_type: flow type as Flow Director understands it
*
* Flow Director will query this function to see if aRFS is currently using
* the specified flow_type for perfect (4-tuple) filters.
*/
bool
ice_is_arfs_using_perfect_flow(struct ice_hw *hw, enum ice_fltr_ptype flow_type)
{
struct ice_arfs_active_fltr_cntrs *arfs_fltr_cntrs;
struct ice_pf *pf = hw->back;
struct ice_vsi *vsi;
vsi = ice_get_main_vsi(pf);
if (!vsi)
return false;
arfs_fltr_cntrs = vsi->arfs_fltr_cntrs;
/* active counters can be updated by multiple CPUs */
smp_mb__before_atomic();
switch (flow_type) {
case ICE_FLTR_PTYPE_NONF_IPV4_UDP:
return atomic_read(&arfs_fltr_cntrs->active_udpv4_cnt) > 0;
case ICE_FLTR_PTYPE_NONF_IPV6_UDP:
return atomic_read(&arfs_fltr_cntrs->active_udpv6_cnt) > 0;
case ICE_FLTR_PTYPE_NONF_IPV4_TCP:
return atomic_read(&arfs_fltr_cntrs->active_tcpv4_cnt) > 0;
case ICE_FLTR_PTYPE_NONF_IPV6_TCP:
return atomic_read(&arfs_fltr_cntrs->active_tcpv6_cnt) > 0;
default:
return false;
}
}
/**
* ice_arfs_update_active_fltr_cntrs - update active filter counters for aRFS
* @vsi: VSI that aRFS is active on
* @entry: aRFS entry used to change counters
* @add: true to increment counter, false to decrement
*/
static void
ice_arfs_update_active_fltr_cntrs(struct ice_vsi *vsi,
struct ice_arfs_entry *entry, bool add)
{
struct ice_arfs_active_fltr_cntrs *fltr_cntrs = vsi->arfs_fltr_cntrs;
switch (entry->fltr_info.flow_type) {
case ICE_FLTR_PTYPE_NONF_IPV4_TCP:
if (add)
atomic_inc(&fltr_cntrs->active_tcpv4_cnt);
else
atomic_dec(&fltr_cntrs->active_tcpv4_cnt);
break;
case ICE_FLTR_PTYPE_NONF_IPV6_TCP:
if (add)
atomic_inc(&fltr_cntrs->active_tcpv6_cnt);
else
atomic_dec(&fltr_cntrs->active_tcpv6_cnt);
break;
case ICE_FLTR_PTYPE_NONF_IPV4_UDP:
if (add)
atomic_inc(&fltr_cntrs->active_udpv4_cnt);
else
atomic_dec(&fltr_cntrs->active_udpv4_cnt);
break;
case ICE_FLTR_PTYPE_NONF_IPV6_UDP:
if (add)
atomic_inc(&fltr_cntrs->active_udpv6_cnt);
else
atomic_dec(&fltr_cntrs->active_udpv6_cnt);
break;
default:
dev_err(ice_pf_to_dev(vsi->back), "aRFS: Failed to update filter counters, invalid filter type %d\n",
entry->fltr_info.flow_type);
}
}
/**
* ice_arfs_del_flow_rules - delete the rules passed in from HW
* @vsi: VSI for the flow rules that need to be deleted
* @del_list_head: head of the list of ice_arfs_entry(s) for rule deletion
*
* Loop through the delete list passed in and remove the rules from HW. After
* each rule is deleted, disconnect and free the ice_arfs_entry because it is no
* longer being referenced by the aRFS hash table.
*/
static void
ice_arfs_del_flow_rules(struct ice_vsi *vsi, struct hlist_head *del_list_head)
{
struct ice_arfs_entry *e;
struct hlist_node *n;
struct device *dev;
dev = ice_pf_to_dev(vsi->back);
hlist_for_each_entry_safe(e, n, del_list_head, list_entry) {
int result;
result = ice_fdir_write_fltr(vsi->back, &e->fltr_info, false,
false);
if (!result)
ice_arfs_update_active_fltr_cntrs(vsi, e, false);
else
dev_dbg(dev, "Unable to delete aRFS entry, err %d fltr_state %d fltr_id %d flow_id %d Q %d\n",
result, e->fltr_state, e->fltr_info.fltr_id,
e->flow_id, e->fltr_info.q_index);
/* The aRFS hash table is no longer referencing this entry */
hlist_del(&e->list_entry);
devm_kfree(dev, e);
}
}
/**
* ice_arfs_add_flow_rules - add the rules passed in from HW
* @vsi: VSI for the flow rules that need to be added
* @add_list_head: head of the list of ice_arfs_entry_ptr(s) for rule addition
*
* Loop through the add list passed in and remove the rules from HW. After each
* rule is added, disconnect and free the ice_arfs_entry_ptr node. Don't free
* the ice_arfs_entry(s) because they are still being referenced in the aRFS
* hash table.
*/
static void
ice_arfs_add_flow_rules(struct ice_vsi *vsi, struct hlist_head *add_list_head)
{
struct ice_arfs_entry_ptr *ep;
struct hlist_node *n;
struct device *dev;
dev = ice_pf_to_dev(vsi->back);
hlist_for_each_entry_safe(ep, n, add_list_head, list_entry) {
int result;
result = ice_fdir_write_fltr(vsi->back,
&ep->arfs_entry->fltr_info, true,
false);
if (!result)
ice_arfs_update_active_fltr_cntrs(vsi, ep->arfs_entry,
true);
else
dev_dbg(dev, "Unable to add aRFS entry, err %d fltr_state %d fltr_id %d flow_id %d Q %d\n",
result, ep->arfs_entry->fltr_state,
ep->arfs_entry->fltr_info.fltr_id,
ep->arfs_entry->flow_id,
ep->arfs_entry->fltr_info.q_index);
hlist_del(&ep->list_entry);
devm_kfree(dev, ep);
}
}
/**
* ice_arfs_is_flow_expired - check if the aRFS entry has expired
* @vsi: VSI containing the aRFS entry
* @arfs_entry: aRFS entry that's being checked for expiration
*
* Return true if the flow has expired, else false. This function should be used
* to determine whether or not an aRFS entry should be removed from the hardware
* and software structures.
*/
static bool
ice_arfs_is_flow_expired(struct ice_vsi *vsi, struct ice_arfs_entry *arfs_entry)
{
#define ICE_ARFS_TIME_DELTA_EXPIRATION msecs_to_jiffies(5000)
if (rps_may_expire_flow(vsi->netdev, arfs_entry->fltr_info.q_index,
arfs_entry->flow_id,
arfs_entry->fltr_info.fltr_id))
return true;
/* expiration timer only used for UDP filters */
if (arfs_entry->fltr_info.flow_type != ICE_FLTR_PTYPE_NONF_IPV4_UDP &&
arfs_entry->fltr_info.flow_type != ICE_FLTR_PTYPE_NONF_IPV6_UDP)
return false;
return time_in_range64(arfs_entry->time_activated +
ICE_ARFS_TIME_DELTA_EXPIRATION,
arfs_entry->time_activated, get_jiffies_64());
}
/**
* ice_arfs_update_flow_rules - add/delete aRFS rules in HW
* @vsi: the VSI to be forwarded to
* @idx: index into the table of aRFS filter lists. Obtained from skb->hash
* @add_list: list to populate with filters to be added to Flow Director
* @del_list: list to populate with filters to be deleted from Flow Director
*
* Iterate over the hlist at the index given in the aRFS hash table and
* determine if there are any aRFS entries that need to be either added or
* deleted in the HW. If the aRFS entry is marked as ICE_ARFS_INACTIVE the
* filter needs to be added to HW, else if it's marked as ICE_ARFS_ACTIVE and
* the flow has expired delete the filter from HW. The caller of this function
* is expected to add/delete rules on the add_list/del_list respectively.
*/
static void
ice_arfs_update_flow_rules(struct ice_vsi *vsi, u16 idx,
struct hlist_head *add_list,
struct hlist_head *del_list)
{
struct ice_arfs_entry *e;
struct hlist_node *n;
struct device *dev;
dev = ice_pf_to_dev(vsi->back);
/* go through the aRFS hlist at this idx and check for needed updates */
hlist_for_each_entry_safe(e, n, &vsi->arfs_fltr_list[idx], list_entry)
/* check if filter needs to be added to HW */
if (e->fltr_state == ICE_ARFS_INACTIVE) {
enum ice_fltr_ptype flow_type = e->fltr_info.flow_type;
struct ice_arfs_entry_ptr *ep =
devm_kzalloc(dev, sizeof(*ep), GFP_ATOMIC);
if (!ep)
continue;
INIT_HLIST_NODE(&ep->list_entry);
/* reference aRFS entry to add HW filter */
ep->arfs_entry = e;
hlist_add_head(&ep->list_entry, add_list);
e->fltr_state = ICE_ARFS_ACTIVE;
/* expiration timer only used for UDP flows */
if (flow_type == ICE_FLTR_PTYPE_NONF_IPV4_UDP ||
flow_type == ICE_FLTR_PTYPE_NONF_IPV6_UDP)
e->time_activated = get_jiffies_64();
} else if (e->fltr_state == ICE_ARFS_ACTIVE) {
/* check if filter needs to be removed from HW */
if (ice_arfs_is_flow_expired(vsi, e)) {
/* remove aRFS entry from hash table for delete
* and to prevent referencing it the next time
* through this hlist index
*/
hlist_del(&e->list_entry);
e->fltr_state = ICE_ARFS_TODEL;
/* save reference to aRFS entry for delete */
hlist_add_head(&e->list_entry, del_list);
}
}
}
/**
* ice_sync_arfs_fltrs - update all aRFS filters
* @pf: board private structure
*/
void ice_sync_arfs_fltrs(struct ice_pf *pf)
{
HLIST_HEAD(tmp_del_list);
HLIST_HEAD(tmp_add_list);
struct ice_vsi *pf_vsi;
unsigned int i;
pf_vsi = ice_get_main_vsi(pf);
if (!pf_vsi)
return;
if (!ice_is_arfs_active(pf_vsi))
return;
spin_lock_bh(&pf_vsi->arfs_lock);
/* Once we process aRFS for the PF VSI get out */
for (i = 0; i < ICE_MAX_ARFS_LIST; i++)
ice_arfs_update_flow_rules(pf_vsi, i, &tmp_add_list,
&tmp_del_list);
spin_unlock_bh(&pf_vsi->arfs_lock);
/* use list of ice_arfs_entry(s) for delete */
ice_arfs_del_flow_rules(pf_vsi, &tmp_del_list);
/* use list of ice_arfs_entry_ptr(s) for add */
ice_arfs_add_flow_rules(pf_vsi, &tmp_add_list);
}
/**
* ice_arfs_build_entry - builds an aRFS entry based on input
* @vsi: destination VSI for this flow
* @fk: flow dissector keys for creating the tuple
* @rxq_idx: Rx queue to steer this flow to
* @flow_id: passed down from the stack and saved for flow expiration
*
* returns an aRFS entry on success and NULL on failure
*/
static struct ice_arfs_entry *
ice_arfs_build_entry(struct ice_vsi *vsi, const struct flow_keys *fk,
u16 rxq_idx, u32 flow_id)
{
struct ice_arfs_entry *arfs_entry;
struct ice_fdir_fltr *fltr_info;
u8 ip_proto;
arfs_entry = devm_kzalloc(ice_pf_to_dev(vsi->back),
sizeof(*arfs_entry),
GFP_ATOMIC | __GFP_NOWARN);
if (!arfs_entry)
return NULL;
fltr_info = &arfs_entry->fltr_info;
fltr_info->q_index = rxq_idx;
fltr_info->dest_ctl = ICE_FLTR_PRGM_DESC_DEST_DIRECT_PKT_QINDEX;
fltr_info->dest_vsi = vsi->idx;
ip_proto = fk->basic.ip_proto;
if (fk->basic.n_proto == htons(ETH_P_IP)) {
fltr_info->ip.v4.proto = ip_proto;
fltr_info->flow_type = (ip_proto == IPPROTO_TCP) ?
ICE_FLTR_PTYPE_NONF_IPV4_TCP :
ICE_FLTR_PTYPE_NONF_IPV4_UDP;
fltr_info->ip.v4.src_ip = fk->addrs.v4addrs.src;
fltr_info->ip.v4.dst_ip = fk->addrs.v4addrs.dst;
fltr_info->ip.v4.src_port = fk->ports.src;
fltr_info->ip.v4.dst_port = fk->ports.dst;
} else { /* ETH_P_IPV6 */
fltr_info->ip.v6.proto = ip_proto;
fltr_info->flow_type = (ip_proto == IPPROTO_TCP) ?
ICE_FLTR_PTYPE_NONF_IPV6_TCP :
ICE_FLTR_PTYPE_NONF_IPV6_UDP;
memcpy(&fltr_info->ip.v6.src_ip, &fk->addrs.v6addrs.src,
sizeof(struct in6_addr));
memcpy(&fltr_info->ip.v6.dst_ip, &fk->addrs.v6addrs.dst,
sizeof(struct in6_addr));
fltr_info->ip.v6.src_port = fk->ports.src;
fltr_info->ip.v6.dst_port = fk->ports.dst;
}
arfs_entry->flow_id = flow_id;
fltr_info->fltr_id =
atomic_inc_return(vsi->arfs_last_fltr_id) % RPS_NO_FILTER;
return arfs_entry;
}
/**
* ice_arfs_is_perfect_flow_set - Check to see if perfect flow is set
* @hw: pointer to HW structure
* @l3_proto: ETH_P_IP or ETH_P_IPV6 in network order
* @l4_proto: IPPROTO_UDP or IPPROTO_TCP
*
* We only support perfect (4-tuple) filters for aRFS. This function allows aRFS
* to check if perfect (4-tuple) flow rules are currently in place by Flow
* Director.
*/
static bool
ice_arfs_is_perfect_flow_set(struct ice_hw *hw, __be16 l3_proto, u8 l4_proto)
{
unsigned long *perfect_fltr = hw->fdir_perfect_fltr;
/* advanced Flow Director disabled, perfect filters always supported */
if (!perfect_fltr)
return true;
if (l3_proto == htons(ETH_P_IP) && l4_proto == IPPROTO_UDP)
return test_bit(ICE_FLTR_PTYPE_NONF_IPV4_UDP, perfect_fltr);
else if (l3_proto == htons(ETH_P_IP) && l4_proto == IPPROTO_TCP)
return test_bit(ICE_FLTR_PTYPE_NONF_IPV4_TCP, perfect_fltr);
else if (l3_proto == htons(ETH_P_IPV6) && l4_proto == IPPROTO_UDP)
return test_bit(ICE_FLTR_PTYPE_NONF_IPV6_UDP, perfect_fltr);
else if (l3_proto == htons(ETH_P_IPV6) && l4_proto == IPPROTO_TCP)
return test_bit(ICE_FLTR_PTYPE_NONF_IPV6_TCP, perfect_fltr);
return false;
}
/**
* ice_rx_flow_steer - steer the Rx flow to where application is being run
* @netdev: ptr to the netdev being adjusted
* @skb: buffer with required header information
* @rxq_idx: queue to which the flow needs to move
* @flow_id: flow identifier provided by the netdev
*
* Based on the skb, rxq_idx, and flow_id passed in add/update an entry in the
* aRFS hash table. Iterate over one of the hlists in the aRFS hash table and
* if the flow_id already exists in the hash table but the rxq_idx has changed
* mark the entry as ICE_ARFS_INACTIVE so it can get updated in HW, else
* if the entry is marked as ICE_ARFS_TODEL delete it from the aRFS hash table.
* If neither of the previous conditions are true then add a new entry in the
* aRFS hash table, which gets set to ICE_ARFS_INACTIVE by default so it can be
* added to HW.
*/
int
ice_rx_flow_steer(struct net_device *netdev, const struct sk_buff *skb,
u16 rxq_idx, u32 flow_id)
{
struct ice_netdev_priv *np = netdev_priv(netdev);
struct ice_arfs_entry *arfs_entry;
struct ice_vsi *vsi = np->vsi;
struct flow_keys fk;
struct ice_pf *pf;
__be16 n_proto;
u8 ip_proto;
u16 idx;
int ret;
/* failed to allocate memory for aRFS so don't crash */
if (unlikely(!vsi->arfs_fltr_list))
return -ENODEV;
pf = vsi->back;
if (skb->encapsulation)
return -EPROTONOSUPPORT;
if (!skb_flow_dissect_flow_keys(skb, &fk, 0))
return -EPROTONOSUPPORT;
n_proto = fk.basic.n_proto;
/* Support only IPV4 and IPV6 */
if ((n_proto == htons(ETH_P_IP) && !ip_is_fragment(ip_hdr(skb))) ||
n_proto == htons(ETH_P_IPV6))
ip_proto = fk.basic.ip_proto;
else
return -EPROTONOSUPPORT;
/* Support only TCP and UDP */
if (ip_proto != IPPROTO_TCP && ip_proto != IPPROTO_UDP)
return -EPROTONOSUPPORT;
/* only support 4-tuple filters for aRFS */
if (!ice_arfs_is_perfect_flow_set(&pf->hw, n_proto, ip_proto))
return -EOPNOTSUPP;
/* choose the aRFS list bucket based on skb hash */
idx = skb_get_hash_raw(skb) & ICE_ARFS_LST_MASK;
/* search for entry in the bucket */
spin_lock_bh(&vsi->arfs_lock);
hlist_for_each_entry(arfs_entry, &vsi->arfs_fltr_list[idx],
list_entry) {
struct ice_fdir_fltr *fltr_info;
/* keep searching for the already existing arfs_entry flow */
if (arfs_entry->flow_id != flow_id)
continue;
fltr_info = &arfs_entry->fltr_info;
ret = fltr_info->fltr_id;
if (fltr_info->q_index == rxq_idx ||
arfs_entry->fltr_state != ICE_ARFS_ACTIVE)
goto out;
/* update the queue to forward to on an already existing flow */
fltr_info->q_index = rxq_idx;
arfs_entry->fltr_state = ICE_ARFS_INACTIVE;
ice_arfs_update_active_fltr_cntrs(vsi, arfs_entry, false);
goto out_schedule_service_task;
}
arfs_entry = ice_arfs_build_entry(vsi, &fk, rxq_idx, flow_id);
if (!arfs_entry) {
ret = -ENOMEM;
goto out;
}
ret = arfs_entry->fltr_info.fltr_id;
INIT_HLIST_NODE(&arfs_entry->list_entry);
hlist_add_head(&arfs_entry->list_entry, &vsi->arfs_fltr_list[idx]);
out_schedule_service_task:
ice_service_task_schedule(pf);
out:
spin_unlock_bh(&vsi->arfs_lock);
return ret;
}
/**
* ice_init_arfs_cntrs - initialize aRFS counter values
* @vsi: VSI that aRFS counters need to be initialized on
*/
static int ice_init_arfs_cntrs(struct ice_vsi *vsi)
{
if (!vsi || vsi->type != ICE_VSI_PF)
return -EINVAL;
vsi->arfs_fltr_cntrs = kzalloc(sizeof(*vsi->arfs_fltr_cntrs),
GFP_KERNEL);
if (!vsi->arfs_fltr_cntrs)
return -ENOMEM;
vsi->arfs_last_fltr_id = kzalloc(sizeof(*vsi->arfs_last_fltr_id),
GFP_KERNEL);
if (!vsi->arfs_last_fltr_id) {
kfree(vsi->arfs_fltr_cntrs);
vsi->arfs_fltr_cntrs = NULL;
return -ENOMEM;
}
return 0;
}
/**
* ice_init_arfs - initialize aRFS resources
* @vsi: the VSI to be forwarded to
*/
void ice_init_arfs(struct ice_vsi *vsi)
{
struct hlist_head *arfs_fltr_list;
unsigned int i;
if (!vsi || vsi->type != ICE_VSI_PF)
return;
arfs_fltr_list = kzalloc(sizeof(*arfs_fltr_list) * ICE_MAX_ARFS_LIST,
GFP_KERNEL);
if (!arfs_fltr_list)
return;
if (ice_init_arfs_cntrs(vsi))
goto free_arfs_fltr_list;
for (i = 0; i < ICE_MAX_ARFS_LIST; i++)
INIT_HLIST_HEAD(&arfs_fltr_list[i]);
spin_lock_init(&vsi->arfs_lock);
vsi->arfs_fltr_list = arfs_fltr_list;
return;
free_arfs_fltr_list:
kfree(arfs_fltr_list);
}
/**
* ice_clear_arfs - clear the aRFS hash table and any memory used for aRFS
* @vsi: the VSI to be forwarded to
*/
void ice_clear_arfs(struct ice_vsi *vsi)
{
struct device *dev;
unsigned int i;
if (!vsi || vsi->type != ICE_VSI_PF || !vsi->back ||
!vsi->arfs_fltr_list)
return;
dev = ice_pf_to_dev(vsi->back);
for (i = 0; i < ICE_MAX_ARFS_LIST; i++) {
struct ice_arfs_entry *r;
struct hlist_node *n;
spin_lock_bh(&vsi->arfs_lock);
hlist_for_each_entry_safe(r, n, &vsi->arfs_fltr_list[i],
list_entry) {
hlist_del(&r->list_entry);
devm_kfree(dev, r);
}
spin_unlock_bh(&vsi->arfs_lock);
}
kfree(vsi->arfs_fltr_list);
vsi->arfs_fltr_list = NULL;
kfree(vsi->arfs_last_fltr_id);
vsi->arfs_last_fltr_id = NULL;
kfree(vsi->arfs_fltr_cntrs);
vsi->arfs_fltr_cntrs = NULL;
}
/**
* ice_free_cpu_rx_rmap - free setup CPU reverse map
* @vsi: the VSI to be forwarded to
*/
void ice_free_cpu_rx_rmap(struct ice_vsi *vsi)
{
struct net_device *netdev;
if (!vsi || vsi->type != ICE_VSI_PF || !vsi->arfs_fltr_list)
return;
netdev = vsi->netdev;
if (!netdev || !netdev->rx_cpu_rmap ||
netdev->reg_state != NETREG_REGISTERED)
return;
free_irq_cpu_rmap(netdev->rx_cpu_rmap);
netdev->rx_cpu_rmap = NULL;
}
/**
* ice_set_cpu_rx_rmap - setup CPU reverse map for each queue
* @vsi: the VSI to be forwarded to
*/
int ice_set_cpu_rx_rmap(struct ice_vsi *vsi)
{
struct net_device *netdev;
struct ice_pf *pf;
int base_idx, i;
if (!vsi || vsi->type != ICE_VSI_PF)
return -EINVAL;
pf = vsi->back;
netdev = vsi->netdev;
if (!pf || !netdev || !vsi->num_q_vectors ||
vsi->netdev->reg_state != NETREG_REGISTERED)
return -EINVAL;
netdev_dbg(netdev, "Setup CPU RMAP: vsi type 0x%x, ifname %s, q_vectors %d\n",
vsi->type, netdev->name, vsi->num_q_vectors);
netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(vsi->num_q_vectors);
if (unlikely(!netdev->rx_cpu_rmap))
return -EINVAL;
base_idx = vsi->base_vector;
for (i = 0; i < vsi->num_q_vectors; i++)
if (irq_cpu_rmap_add(netdev->rx_cpu_rmap,
pf->msix_entries[base_idx + i].vector)) {
ice_free_cpu_rx_rmap(vsi);
return -EINVAL;
}
return 0;
}
/**
* ice_remove_arfs - remove/clear all aRFS resources
* @pf: device private structure
*/
void ice_remove_arfs(struct ice_pf *pf)
{
struct ice_vsi *pf_vsi;
pf_vsi = ice_get_main_vsi(pf);
if (!pf_vsi)
return;
ice_free_cpu_rx_rmap(pf_vsi);
ice_clear_arfs(pf_vsi);
}
/**
* ice_rebuild_arfs - remove/clear all aRFS resources and rebuild after reset
* @pf: device private structure
*/
void ice_rebuild_arfs(struct ice_pf *pf)
{
struct ice_vsi *pf_vsi;
pf_vsi = ice_get_main_vsi(pf);
if (!pf_vsi)
return;
ice_remove_arfs(pf);
if (ice_set_cpu_rx_rmap(pf_vsi)) {
dev_err(ice_pf_to_dev(pf), "Failed to rebuild aRFS\n");
return;
}
ice_init_arfs(pf_vsi);
}

82
drivers/net/ethernet/intel/ice/ice_arfs.h Normal file
View File

@ -0,0 +1,82 @@
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2018-2020, Intel Corporation. */
#ifndef _ICE_ARFS_H_
#define _ICE_ARFS_H_
enum ice_arfs_fltr_state {
ICE_ARFS_INACTIVE,
ICE_ARFS_ACTIVE,
ICE_ARFS_TODEL,
};
struct ice_arfs_entry {
struct ice_fdir_fltr fltr_info;
struct hlist_node list_entry;
u64 time_activated; /* only valid for UDP flows */
u32 flow_id;
/* fltr_state = 0 - ICE_ARFS_INACTIVE:
* filter needs to be updated or programmed in HW.
* fltr_state = 1 - ICE_ARFS_ACTIVE:
* filter is active and programmed in HW.
* fltr_state = 2 - ICE_ARFS_TODEL:
* filter has been deleted from HW and needs to be removed from
* the aRFS hash table.
*/
u8 fltr_state;
};
struct ice_arfs_entry_ptr {
struct ice_arfs_entry *arfs_entry;
struct hlist_node list_entry;
};
struct ice_arfs_active_fltr_cntrs {
atomic_t active_tcpv4_cnt;
atomic_t active_tcpv6_cnt;
atomic_t active_udpv4_cnt;
atomic_t active_udpv6_cnt;
};
#ifdef CONFIG_RFS_ACCEL
int
ice_rx_flow_steer(struct net_device *netdev, const struct sk_buff *skb,
u16 rxq_idx, u32 flow_id);
void ice_clear_arfs(struct ice_vsi *vsi);
void ice_free_cpu_rx_rmap(struct ice_vsi *vsi);
void ice_init_arfs(struct ice_vsi *vsi);
void ice_sync_arfs_fltrs(struct ice_pf *pf);
int ice_set_cpu_rx_rmap(struct ice_vsi *vsi);
void ice_remove_arfs(struct ice_pf *pf);
void ice_rebuild_arfs(struct ice_pf *pf);
bool
ice_is_arfs_using_perfect_flow(struct ice_hw *hw,
enum ice_fltr_ptype flow_type);
#else
#define ice_sync_arfs_fltrs(pf) do {} while (0)
#define ice_init_arfs(vsi) do {} while (0)
#define ice_clear_arfs(vsi) do {} while (0)
#define ice_remove_arfs(pf) do {} while (0)
#define ice_free_cpu_rx_rmap(vsi) do {} while (0)
#define ice_rebuild_arfs(pf) do {} while (0)
static inline int ice_set_cpu_rx_rmap(struct ice_vsi __always_unused *vsi)
{
return 0;
}
static inline int
ice_rx_flow_steer(struct net_device __always_unused *netdev,
const struct sk_buff __always_unused *skb,
u16 __always_unused rxq_idx, u32 __always_unused flow_id)
{
return -EOPNOTSUPP;
}
static inline bool
ice_is_arfs_using_perfect_flow(struct ice_hw __always_unused *hw,
enum ice_fltr_ptype __always_unused flow_type)
{
return false;
}
#endif /* CONFIG_RFS_ACCEL */
#endif /* _ICE_ARFS_H_ */

8
drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c
View File

@ -566,6 +566,12 @@ ice_fdir_set_hw_fltr_rule(struct ice_pf *pf, struct ice_flow_seg_info *seg,
return -EINVAL;
}
if (ice_is_arfs_using_perfect_flow(hw, flow)) {
dev_err(dev, "aRFS using perfect flow type %d, cannot change input set\n",
flow);
return -EINVAL;
}
/* remove HW filter definition */
ice_fdir_rem_flow(hw, ICE_BLK_FD, flow);
}
@ -1176,7 +1182,7 @@ err_exit:
*
* returns 0 on success and negative value on error
*/
static int
int
ice_fdir_write_fltr(struct ice_pf *pf, struct ice_fdir_fltr *input, bool add,
bool is_tun)
{

1
drivers/net/ethernet/intel/ice/ice_lib.c
View File

@ -2175,6 +2175,7 @@ ice_vsi_setup(struct ice_pf *pf, struct ice_port_info *pi,
ice_vsi_cfg_rss_lut_key(vsi);
ice_vsi_set_rss_flow_fld(vsi);
}
ice_init_arfs(vsi);
break;
case ICE_VSI_VF:
/* VF driver will take care of creating netdev for this type and

48
drivers/net/ethernet/intel/ice/ice_main.c
View File

@ -1113,7 +1113,7 @@ static void ice_clean_mailboxq_subtask(struct ice_pf *pf)
*
* If not already scheduled, this puts the task into the work queue.
*/
static void ice_service_task_schedule(struct ice_pf *pf)
void ice_service_task_schedule(struct ice_pf *pf)
{
if (!test_bit(__ICE_SERVICE_DIS, pf->state) &&
!test_and_set_bit(__ICE_SERVICE_SCHED, pf->state) &&
@ -1483,7 +1483,7 @@ static void ice_service_task(struct work_struct *work)
ice_process_vflr_event(pf);
ice_clean_mailboxq_subtask(pf);
ice_sync_arfs_fltrs(pf);
/* Clear __ICE_SERVICE_SCHED flag to allow scheduling next event */
ice_service_task_complete(pf);
@ -1642,9 +1642,14 @@ static int ice_vsi_req_irq_msix(struct ice_vsi *vsi, char *basename)
}
/* register for affinity change notifications */
q_vector->affinity_notify.notify = ice_irq_affinity_notify;
q_vector->affinity_notify.release = ice_irq_affinity_release;
irq_set_affinity_notifier(irq_num, &q_vector->affinity_notify);
if (!IS_ENABLED(CONFIG_RFS_ACCEL)) {
struct irq_affinity_notify *affinity_notify;
affinity_notify = &q_vector->affinity_notify;
affinity_notify->notify = ice_irq_affinity_notify;
affinity_notify->release = ice_irq_affinity_release;
irq_set_affinity_notifier(irq_num, affinity_notify);
}
/* assign the mask for this irq */
irq_set_affinity_hint(irq_num, &q_vector->affinity_mask);
@ -1656,8 +1661,9 @@ static int ice_vsi_req_irq_msix(struct ice_vsi *vsi, char *basename)
free_q_irqs:
while (vector) {
vector--;
irq_num = pf->msix_entries[base + vector].vector,
irq_set_affinity_notifier(irq_num, NULL);
irq_num = pf->msix_entries[base + vector].vector;
if (!IS_ENABLED(CONFIG_RFS_ACCEL))
irq_set_affinity_notifier(irq_num, NULL);
irq_set_affinity_hint(irq_num, NULL);
devm_free_irq(dev, irq_num, &vsi->q_vectors[vector]);
}
@ -2611,12 +2617,22 @@ static int ice_setup_pf_sw(struct ice_pf *pf)
*/
ice_napi_add(vsi);
status = ice_set_cpu_rx_rmap(vsi);
if (status) {
dev_err(ice_pf_to_dev(pf), "Failed to set CPU Rx map VSI %d error %d\n",
vsi->vsi_num, status);
status = -EINVAL;
goto unroll_napi_add;
}
status = ice_init_mac_fltr(pf);
if (status)
goto unroll_napi_add;
goto free_cpu_rx_map;
return status;
free_cpu_rx_map:
ice_free_cpu_rx_rmap(vsi);
unroll_napi_add:
if (vsi) {
ice_napi_del(vsi);
@ -3519,6 +3535,8 @@ static void ice_remove(struct pci_dev *pdev)
ice_service_task_stop(pf);
mutex_destroy(&(&pf->hw)->fdir_fltr_lock);
if (!ice_is_safe_mode(pf))
ice_remove_arfs(pf);
ice_devlink_destroy_port(pf);
ice_vsi_release_all(pf);
ice_free_irq_msix_misc(pf);
@ -4036,11 +4054,14 @@ ice_set_features(struct net_device *netdev, netdev_features_t features)
ret = ice_cfg_vlan_pruning(vsi, false, false);
if ((features & NETIF_F_NTUPLE) &&
!(netdev->features & NETIF_F_NTUPLE))
!(netdev->features & NETIF_F_NTUPLE)) {
ice_vsi_manage_fdir(vsi, true);
else if (!(features & NETIF_F_NTUPLE) &&
(netdev->features & NETIF_F_NTUPLE))
ice_init_arfs(vsi);
} else if (!(features & NETIF_F_NTUPLE) &&
(netdev->features & NETIF_F_NTUPLE)) {
ice_vsi_manage_fdir(vsi, false);
ice_clear_arfs(vsi);
}
return ret;
}
@ -4942,6 +4963,8 @@ static void ice_rebuild(struct ice_pf *pf, enum ice_reset_req reset_type)
/* replay Flow Director filters */
ice_fdir_replay_fltrs(pf);
ice_rebuild_arfs(pf);
}
ice_update_pf_netdev_link(pf);
@ -5721,6 +5744,9 @@ static const struct net_device_ops ice_netdev_ops = {
.ndo_bridge_setlink = ice_bridge_setlink,
.ndo_fdb_add = ice_fdb_add,
.ndo_fdb_del = ice_fdb_del,
#ifdef CONFIG_RFS_ACCEL
.ndo_rx_flow_steer = ice_rx_flow_steer,
#endif
.ndo_tx_timeout = ice_tx_timeout,
.ndo_bpf = ice_xdp,
.ndo_xdp_xmit = ice_xdp_xmit,