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igc: Refactor igc_ethtool_update_nfc_rule() 

Current implementation of igc_ethtool_update_nfc_rule() is a bit
convoluted since it handles too many things: rule lookup, deletion
and addition. This patch breaks it into three functions so we simplify
the code and improve code reuse.

Code related to rule lookup is refactored out to a new function called
igc_get_nfc_rule().

Code related to rule addition is refactored out to a new function called
igc_add_nfc_rule(). This function enables the rule in hardware and adds
it to the adapter's list.

Code related to rule deletion is refactored out to a new function called
igc_del_nfc_rule(). This function disables the rule in hardware, removes
it from adapter's list, and deletes it.

As a byproduct of this refactoring, igc_enable_nfc_rule() and
igc_disable_nfc_rule() are moved to igc_main.c since they are not used
in igc_ethtool.c anymore, and igc_restore_nfc_rules() and igc_nfc_rule_
exit() are moved around to avoid forward declaration.

Also, since this patch already touches igc_ethtool_get_nfc_rule(), it
takes the opportunity to remove the 'match_flags' check. Empty flags
are not allowed to be added so no need to check that.

Signed-off-by: Andre Guedes <andre.guedes@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Andre Guedes 2020-04-24 13:16:18 -07:00 committed by Jeff Kirsher
parent d957c6010a
commit 36fa21520f
3 changed files with 195 additions and 166 deletions
drivers/net/ethernet/intel/igc
igc.higc_ethtool.cigc_main.c

18
drivers/net/ethernet/intel/igc/igc.h
View File

@ -232,16 +232,6 @@ void igc_write_rss_indir_tbl(struct igc_adapter *adapter);
bool igc_has_link(struct igc_adapter *adapter);
void igc_reset(struct igc_adapter *adapter);
int igc_set_spd_dplx(struct igc_adapter *adapter, u32 spd, u8 dplx);
int igc_add_mac_filter(struct igc_adapter *adapter,
enum igc_mac_filter_type type, const u8 *addr,
int queue);
int igc_del_mac_filter(struct igc_adapter *adapter,
enum igc_mac_filter_type type, const u8 *addr);
int igc_add_vlan_prio_filter(struct igc_adapter *adapter, int prio,
int queue);
void igc_del_vlan_prio_filter(struct igc_adapter *adapter, int prio);
int igc_add_etype_filter(struct igc_adapter *adapter, u16 etype, int queue);
int igc_del_etype_filter(struct igc_adapter *adapter, u16 etype);
void igc_update_stats(struct igc_adapter *adapter);
/* igc_dump declarations */
@ -544,10 +534,10 @@ static inline s32 igc_read_phy_reg(struct igc_hw *hw, u32 offset, u16 *data)
}
void igc_reinit_locked(struct igc_adapter *);
int igc_enable_nfc_rule(struct igc_adapter *adapter,
const struct igc_nfc_rule *rule);
int igc_disable_nfc_rule(struct igc_adapter *adapter,
const struct igc_nfc_rule *rule);
struct igc_nfc_rule *igc_get_nfc_rule(struct igc_adapter *adapter,
u32 location);
int igc_add_nfc_rule(struct igc_adapter *adapter, struct igc_nfc_rule *rule);
void igc_del_nfc_rule(struct igc_adapter *adapter, struct igc_nfc_rule *rule);
void igc_ptp_init(struct igc_adapter *adapter);
void igc_ptp_reset(struct igc_adapter *adapter);

138
drivers/net/ethernet/intel/igc/igc_ethtool.c
View File

@ -941,15 +941,8 @@ static int igc_ethtool_get_nfc_rule(struct igc_adapter *adapter,
spin_lock(&adapter->nfc_rule_lock);
list_for_each_entry(rule, &adapter->nfc_rule_list, list) {
if (fsp->location <= rule->location)
break;
}
if (!rule || fsp->location != rule->location)
goto out;
if (!rule->filter.match_flags)
rule = igc_get_nfc_rule(adapter, fsp->location);
if (!rule)
goto out;
fsp->flow_type = ETHER_FLOW;
@ -1190,108 +1183,6 @@ static int igc_ethtool_set_rss_hash_opt(struct igc_adapter *adapter,
return 0;
}
int igc_enable_nfc_rule(struct igc_adapter *adapter,
const struct igc_nfc_rule *rule)
{
int err = -EINVAL;
if (rule->filter.match_flags & IGC_FILTER_FLAG_ETHER_TYPE) {
err = igc_add_etype_filter(adapter, rule->filter.etype,
rule->action);
if (err)
return err;
}
if (rule->filter.match_flags & IGC_FILTER_FLAG_SRC_MAC_ADDR) {
err = igc_add_mac_filter(adapter, IGC_MAC_FILTER_TYPE_SRC,
rule->filter.src_addr, rule->action);
if (err)
return err;
}
if (rule->filter.match_flags & IGC_FILTER_FLAG_DST_MAC_ADDR) {
err = igc_add_mac_filter(adapter, IGC_MAC_FILTER_TYPE_DST,
rule->filter.dst_addr, rule->action);
if (err)
return err;
}
if (rule->filter.match_flags & IGC_FILTER_FLAG_VLAN_TCI) {
int prio = (rule->filter.vlan_tci & VLAN_PRIO_MASK) >>
VLAN_PRIO_SHIFT;
err = igc_add_vlan_prio_filter(adapter, prio, rule->action);
if (err)
return err;
}
return 0;
}
int igc_disable_nfc_rule(struct igc_adapter *adapter,
const struct igc_nfc_rule *rule)
{
if (rule->filter.match_flags & IGC_FILTER_FLAG_ETHER_TYPE)
igc_del_etype_filter(adapter, rule->filter.etype);
if (rule->filter.match_flags & IGC_FILTER_FLAG_VLAN_TCI) {
int prio = (rule->filter.vlan_tci & VLAN_PRIO_MASK) >>
VLAN_PRIO_SHIFT;
igc_del_vlan_prio_filter(adapter, prio);
}
if (rule->filter.match_flags & IGC_FILTER_FLAG_SRC_MAC_ADDR)
igc_del_mac_filter(adapter, IGC_MAC_FILTER_TYPE_SRC,
rule->filter.src_addr);
if (rule->filter.match_flags & IGC_FILTER_FLAG_DST_MAC_ADDR)
igc_del_mac_filter(adapter, IGC_MAC_FILTER_TYPE_DST,
rule->filter.dst_addr);
return 0;
}
static int igc_ethtool_update_nfc_rule(struct igc_adapter *adapter,
struct igc_nfc_rule *input,
u32 location)
{
struct igc_nfc_rule *rule, *parent;
int err = -EINVAL;
parent = NULL;
rule = NULL;
list_for_each_entry(rule, &adapter->nfc_rule_list, list) {
/* hash found, or no matching entry */
if (rule->location >= location)
break;
parent = rule;
}
/* if there is an old rule occupying our place remove it */
if (rule && rule->location == location) {
err = igc_disable_nfc_rule(adapter, rule);
list_del(&rule->list);
kfree(rule);
adapter->nfc_rule_count--;
}
/* If no input this was a delete, err should be 0 if a rule was
* successfully found and removed from the list else -EINVAL
*/
if (!input)
return err;
list_add(&input->list, parent ? &parent->list :
&adapter->nfc_rule_list);
/* update counts */
adapter->nfc_rule_count++;
return 0;
}
static void igc_ethtool_init_nfc_rule(struct igc_nfc_rule *rule,
const struct ethtool_rx_flow_spec *fsp)
{
@ -1376,7 +1267,7 @@ static int igc_ethtool_add_nfc_rule(struct igc_adapter *adapter,
struct net_device *netdev = adapter->netdev;
struct ethtool_rx_flow_spec *fsp =
(struct ethtool_rx_flow_spec *)&cmd->fs;
struct igc_nfc_rule *rule;
struct igc_nfc_rule *rule, *old_rule;
int err;
if (!(netdev->hw_features & NETIF_F_NTUPLE)) {
@ -1417,12 +1308,14 @@ static int igc_ethtool_add_nfc_rule(struct igc_adapter *adapter,
if (err)
goto err;
err = igc_enable_nfc_rule(adapter, rule);
old_rule = igc_get_nfc_rule(adapter, fsp->location);
if (old_rule)
igc_del_nfc_rule(adapter, old_rule);
err = igc_add_nfc_rule(adapter, rule);
if (err)
goto err;
igc_ethtool_update_nfc_rule(adapter, rule, rule->location);
spin_unlock(&adapter->nfc_rule_lock);
return 0;
@ -1437,13 +1330,20 @@ static int igc_ethtool_del_nfc_rule(struct igc_adapter *adapter,
{
struct ethtool_rx_flow_spec *fsp =
(struct ethtool_rx_flow_spec *)&cmd->fs;
int err;
struct igc_nfc_rule *rule;
spin_lock(&adapter->nfc_rule_lock);
err = igc_ethtool_update_nfc_rule(adapter, NULL, fsp->location);
spin_unlock(&adapter->nfc_rule_lock);
return err;
rule = igc_get_nfc_rule(adapter, fsp->location);
if (!rule) {
spin_unlock(&adapter->nfc_rule_lock);
return -EINVAL;
}
igc_del_nfc_rule(adapter, rule);
spin_unlock(&adapter->nfc_rule_lock);
return 0;
}
static int igc_ethtool_set_rxnfc(struct net_device *dev,

205
drivers/net/ethernet/intel/igc/igc_main.c
View File

@ -2174,18 +2174,6 @@ static bool igc_clean_tx_irq(struct igc_q_vector *q_vector, int napi_budget)
return !!budget;
}
static void igc_restore_nfc_rules(struct igc_adapter *adapter)
{
struct igc_nfc_rule *rule;
spin_lock(&adapter->nfc_rule_lock);
list_for_each_entry_reverse(rule, &adapter->nfc_rule_list, list)
igc_enable_nfc_rule(adapter, rule);
spin_unlock(&adapter->nfc_rule_lock);
}
static int igc_find_mac_filter(struct igc_adapter *adapter,
enum igc_mac_filter_type type, const u8 *addr)
{
@ -2242,9 +2230,9 @@ static int igc_get_avail_mac_filter_slot(struct igc_adapter *adapter)
*
* Return: 0 in case of success, negative errno code otherwise.
*/
int igc_add_mac_filter(struct igc_adapter *adapter,
enum igc_mac_filter_type type, const u8 *addr,
int queue)
static int igc_add_mac_filter(struct igc_adapter *adapter,
enum igc_mac_filter_type type, const u8 *addr,
int queue)
{
struct net_device *dev = adapter->netdev;
int index;
@ -2274,8 +2262,8 @@ update_filter:
*
* Return: 0 in case of success, negative errno code otherwise.
*/
int igc_del_mac_filter(struct igc_adapter *adapter,
enum igc_mac_filter_type type, const u8 *addr)
static int igc_del_mac_filter(struct igc_adapter *adapter,
enum igc_mac_filter_type type, const u8 *addr)
{
struct net_device *dev = adapter->netdev;
int index;
@ -2312,7 +2300,8 @@ int igc_del_mac_filter(struct igc_adapter *adapter,
*
* Return: 0 in case of success, negative errno code otherwise.
*/
int igc_add_vlan_prio_filter(struct igc_adapter *adapter, int prio, int queue)
static int igc_add_vlan_prio_filter(struct igc_adapter *adapter, int prio,
int queue)
{
struct net_device *dev = adapter->netdev;
struct igc_hw *hw = &adapter->hw;
@ -2340,7 +2329,7 @@ int igc_add_vlan_prio_filter(struct igc_adapter *adapter, int prio, int queue)
* @adapter: Pointer to adapter where the filter should be deleted from
* @prio: VLAN priority value
*/
void igc_del_vlan_prio_filter(struct igc_adapter *adapter, int prio)
static void igc_del_vlan_prio_filter(struct igc_adapter *adapter, int prio)
{
struct igc_hw *hw = &adapter->hw;
u32 vlanpqf;
@ -2381,7 +2370,8 @@ static int igc_get_avail_etype_filter_slot(struct igc_adapter *adapter)
*
* Return: 0 in case of success, negative errno code otherwise.
*/
int igc_add_etype_filter(struct igc_adapter *adapter, u16 etype, int queue)
static int igc_add_etype_filter(struct igc_adapter *adapter, u16 etype,
int queue)
{
struct igc_hw *hw = &adapter->hw;
int index;
@ -2433,7 +2423,7 @@ static int igc_find_etype_filter(struct igc_adapter *adapter, u16 etype)
*
* Return: 0 in case of success, negative errno code otherwise.
*/
int igc_del_etype_filter(struct igc_adapter *adapter, u16 etype)
static int igc_del_etype_filter(struct igc_adapter *adapter, u16 etype)
{
struct igc_hw *hw = &adapter->hw;
int index;
@ -2449,6 +2439,167 @@ int igc_del_etype_filter(struct igc_adapter *adapter, u16 etype)
return 0;
}
static int igc_enable_nfc_rule(struct igc_adapter *adapter,
const struct igc_nfc_rule *rule)
{
int err;
if (rule->filter.match_flags & IGC_FILTER_FLAG_ETHER_TYPE) {
err = igc_add_etype_filter(adapter, rule->filter.etype,
rule->action);
if (err)
return err;
}
if (rule->filter.match_flags & IGC_FILTER_FLAG_SRC_MAC_ADDR) {
err = igc_add_mac_filter(adapter, IGC_MAC_FILTER_TYPE_SRC,
rule->filter.src_addr, rule->action);
if (err)
return err;
}
if (rule->filter.match_flags & IGC_FILTER_FLAG_DST_MAC_ADDR) {
err = igc_add_mac_filter(adapter, IGC_MAC_FILTER_TYPE_DST,
rule->filter.dst_addr, rule->action);
if (err)
return err;
}
if (rule->filter.match_flags & IGC_FILTER_FLAG_VLAN_TCI) {
int prio = (rule->filter.vlan_tci & VLAN_PRIO_MASK) >>
VLAN_PRIO_SHIFT;
err = igc_add_vlan_prio_filter(adapter, prio, rule->action);
if (err)
return err;
}
return 0;
}
static int igc_disable_nfc_rule(struct igc_adapter *adapter,
const struct igc_nfc_rule *rule)
{
if (rule->filter.match_flags & IGC_FILTER_FLAG_ETHER_TYPE)
igc_del_etype_filter(adapter, rule->filter.etype);
if (rule->filter.match_flags & IGC_FILTER_FLAG_VLAN_TCI) {
int prio = (rule->filter.vlan_tci & VLAN_PRIO_MASK) >>
VLAN_PRIO_SHIFT;
igc_del_vlan_prio_filter(adapter, prio);
}
if (rule->filter.match_flags & IGC_FILTER_FLAG_SRC_MAC_ADDR)
igc_del_mac_filter(adapter, IGC_MAC_FILTER_TYPE_SRC,
rule->filter.src_addr);
if (rule->filter.match_flags & IGC_FILTER_FLAG_DST_MAC_ADDR)
igc_del_mac_filter(adapter, IGC_MAC_FILTER_TYPE_DST,
rule->filter.dst_addr);
return 0;
}
/**
* igc_get_nfc_rule() - Get NFC rule
* @adapter: Pointer to adapter
* @location: Rule location
*
* Context: Expects adapter->nfc_rule_lock to be held by caller.
*
* Return: Pointer to NFC rule at @location. If not found, NULL.
*/
struct igc_nfc_rule *igc_get_nfc_rule(struct igc_adapter *adapter,
u32 location)
{
struct igc_nfc_rule *rule;
list_for_each_entry(rule, &adapter->nfc_rule_list, list) {
if (rule->location == location)
return rule;
if (rule->location > location)
break;
}
return NULL;
}
/**
* igc_del_nfc_rule() - Delete NFC rule
* @adapter: Pointer to adapter
* @rule: Pointer to rule to be deleted
*
* Disable NFC rule in hardware and delete it from adapter.
*
* Context: Expects adapter->nfc_rule_lock to be held by caller.
*/
void igc_del_nfc_rule(struct igc_adapter *adapter, struct igc_nfc_rule *rule)
{
igc_disable_nfc_rule(adapter, rule);
list_del(&rule->list);
adapter->nfc_rule_count--;
kfree(rule);
}
/**
* igc_add_nfc_rule() - Add NFC rule
* @adapter: Pointer to adapter
* @rule: Pointer to rule to be added
*
* Enable NFC rule in hardware and add it to adapter.
*
* Context: Expects adapter->nfc_rule_lock to be held by caller.
*
* Return: 0 on success, negative errno on failure.
*/
int igc_add_nfc_rule(struct igc_adapter *adapter, struct igc_nfc_rule *rule)
{
struct igc_nfc_rule *pred, *cur;
int err;
err = igc_enable_nfc_rule(adapter, rule);
if (err)
return err;
pred = NULL;
list_for_each_entry(cur, &adapter->nfc_rule_list, list) {
if (cur->location >= rule->location)
break;
pred = cur;
}
list_add(&rule->list, pred ? &pred->list : &adapter->nfc_rule_list);
adapter->nfc_rule_count++;
return 0;
}
static void igc_restore_nfc_rules(struct igc_adapter *adapter)
{
struct igc_nfc_rule *rule;
spin_lock(&adapter->nfc_rule_lock);
list_for_each_entry_reverse(rule, &adapter->nfc_rule_list, list)
igc_enable_nfc_rule(adapter, rule);
spin_unlock(&adapter->nfc_rule_lock);
}
static void igc_nfc_rule_exit(struct igc_adapter *adapter)
{
struct igc_nfc_rule *rule;
spin_lock(&adapter->nfc_rule_lock);
list_for_each_entry(rule, &adapter->nfc_rule_list, list)
igc_disable_nfc_rule(adapter, rule);
spin_unlock(&adapter->nfc_rule_lock);
}
static int igc_uc_sync(struct net_device *netdev, const unsigned char *addr)
{
struct igc_adapter *adapter = netdev_priv(netdev);
@ -3648,18 +3799,6 @@ void igc_update_stats(struct igc_adapter *adapter)
adapter->stats.mgpdc += rd32(IGC_MGTPDC);
}
static void igc_nfc_rule_exit(struct igc_adapter *adapter)
{
struct igc_nfc_rule *rule;
spin_lock(&adapter->nfc_rule_lock);
list_for_each_entry(rule, &adapter->nfc_rule_list, list)
igc_disable_nfc_rule(adapter, rule);
spin_unlock(&adapter->nfc_rule_lock);
}
/**
* igc_down - Close the interface
* @adapter: board private structure