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Message-Id: <20190319223619.13296-7-jeffrey.t.kirsher@intel.com>
Date: Tue, 19 Mar 2019 15:36:15 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Sasha Neftin <sasha.neftin@...el.com>, netdev@...r.kernel.org,
nhorman@...hat.com, sassmann@...hat.com,
Aaron Brown <aaron.f.brown@...el.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 06/10] igc: Extend the ethtool supporting
From: Sasha Neftin <sasha.neftin@...el.com>
Add show and configure network flow classification (NFC) methods
to the ethtool. Show the specifies Rx ntuple filters.
Configures receive network flow classification option or rules.
Signed-off-by: Sasha Neftin <sasha.neftin@...el.com>
Tested-by: Aaron Brown <aaron.f.brown@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/igc/igc.h | 55 +-
drivers/net/ethernet/intel/igc/igc_defines.h | 4 +
drivers/net/ethernet/intel/igc/igc_ethtool.c | 602 +++++++++++++++++++
drivers/net/ethernet/intel/igc/igc_main.c | 145 +++++
drivers/net/ethernet/intel/igc/igc_regs.h | 11 +
5 files changed, 814 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h
index 473a65c51382..7eee12972d86 100644
--- a/drivers/net/ethernet/intel/igc/igc.h
+++ b/drivers/net/ethernet/intel/igc/igc.h
@@ -33,6 +33,10 @@ 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_steering_filter(struct igc_adapter *adapter,
+ const u8 *addr, u8 queue, u8 flags);
+int igc_del_mac_steering_filter(struct igc_adapter *adapter,
+ const u8 *addr, u8 queue, u8 flags);
extern char igc_driver_name[];
extern char igc_driver_version[];
@@ -292,15 +296,50 @@ struct igc_q_vector {
struct igc_ring ring[0] ____cacheline_internodealigned_in_smp;
};
+#define MAX_ETYPE_FILTER (4 - 1)
+
+enum igc_filter_match_flags {
+ IGC_FILTER_FLAG_ETHER_TYPE = 0x1,
+ IGC_FILTER_FLAG_VLAN_TCI = 0x2,
+ IGC_FILTER_FLAG_SRC_MAC_ADDR = 0x4,
+ IGC_FILTER_FLAG_DST_MAC_ADDR = 0x8,
+};
+
+/* RX network flow classification data structure */
+struct igc_nfc_input {
+ /* Byte layout in order, all values with MSB first:
+ * match_flags - 1 byte
+ * etype - 2 bytes
+ * vlan_tci - 2 bytes
+ */
+ u8 match_flags;
+ __be16 etype;
+ __be16 vlan_tci;
+ u8 src_addr[ETH_ALEN];
+ u8 dst_addr[ETH_ALEN];
+};
+
+struct igc_nfc_filter {
+ struct hlist_node nfc_node;
+ struct igc_nfc_input filter;
+ unsigned long cookie;
+ u16 etype_reg_index;
+ u16 sw_idx;
+ u16 action;
+};
+
struct igc_mac_addr {
u8 addr[ETH_ALEN];
u8 queue;
u8 state; /* bitmask */
};
-#define IGC_MAC_STATE_DEFAULT 0x1
-#define IGC_MAC_STATE_MODIFIED 0x2
-#define IGC_MAC_STATE_IN_USE 0x4
+#define IGC_MAC_STATE_DEFAULT 0x1
+#define IGC_MAC_STATE_IN_USE 0x2
+#define IGC_MAC_STATE_SRC_ADDR 0x4
+#define IGC_MAC_STATE_QUEUE_STEERING 0x8
+
+#define IGC_MAX_RXNFC_FILTERS 16
/* Board specific private data structure */
struct igc_adapter {
@@ -369,8 +408,14 @@ struct igc_adapter {
u32 rss_queues;
u32 rss_indir_tbl_init;
+ /* RX network flow classification support */
+ struct hlist_head nfc_filter_list;
+ struct hlist_head cls_flower_list;
+ unsigned int nfc_filter_count;
+
/* lock for RX network flow classification filter */
spinlock_t nfc_lock;
+ bool etype_bitmap[MAX_ETYPE_FILTER];
struct igc_mac_addr *mac_table;
@@ -456,6 +501,10 @@ static inline s32 igc_read_phy_reg(struct igc_hw *hw, u32 offset, u16 *data)
/* forward declaration */
void igc_reinit_locked(struct igc_adapter *);
+int igc_add_filter(struct igc_adapter *adapter,
+ struct igc_nfc_filter *input);
+int igc_erase_filter(struct igc_adapter *adapter,
+ struct igc_nfc_filter *input);
#define igc_rx_pg_size(_ring) (PAGE_SIZE << igc_rx_pg_order(_ring))
diff --git a/drivers/net/ethernet/intel/igc/igc_defines.h b/drivers/net/ethernet/intel/igc/igc_defines.h
index 3666f8837cc8..925c89b57ec5 100644
--- a/drivers/net/ethernet/intel/igc/igc_defines.h
+++ b/drivers/net/ethernet/intel/igc/igc_defines.h
@@ -400,4 +400,8 @@
#define IGC_N0_QUEUE -1
+#define IGC_VLAPQF_QUEUE_SEL(_n, q_idx) ((q_idx) << ((_n) * 4))
+#define IGC_VLAPQF_P_VALID(_n) (0x1 << (3 + (_n) * 4))
+#define IGC_VLAPQF_QUEUE_MASK 0x03
+
#endif /* _IGC_DEFINES_H_ */
diff --git a/drivers/net/ethernet/intel/igc/igc_ethtool.c b/drivers/net/ethernet/intel/igc/igc_ethtool.c
index eff37a6c0afa..25d14fc82bf8 100644
--- a/drivers/net/ethernet/intel/igc/igc_ethtool.c
+++ b/drivers/net/ethernet/intel/igc/igc_ethtool.c
@@ -2,6 +2,7 @@
/* Copyright (c) 2018 Intel Corporation */
/* ethtool support for igc */
+#include <linux/if_vlan.h>
#include <linux/pm_runtime.h>
#include "igc.h"
@@ -643,6 +644,605 @@ static int igc_set_coalesce(struct net_device *netdev,
return 0;
}
+#define ETHER_TYPE_FULL_MASK ((__force __be16)~0)
+static int igc_get_ethtool_nfc_entry(struct igc_adapter *adapter,
+ struct ethtool_rxnfc *cmd)
+{
+ struct ethtool_rx_flow_spec *fsp = &cmd->fs;
+ struct igc_nfc_filter *rule = NULL;
+
+ /* report total rule count */
+ cmd->data = IGC_MAX_RXNFC_FILTERS;
+
+ hlist_for_each_entry(rule, &adapter->nfc_filter_list, nfc_node) {
+ if (fsp->location <= rule->sw_idx)
+ break;
+ }
+
+ if (!rule || fsp->location != rule->sw_idx)
+ return -EINVAL;
+
+ if (rule->filter.match_flags) {
+ fsp->flow_type = ETHER_FLOW;
+ fsp->ring_cookie = rule->action;
+ if (rule->filter.match_flags & IGC_FILTER_FLAG_ETHER_TYPE) {
+ fsp->h_u.ether_spec.h_proto = rule->filter.etype;
+ fsp->m_u.ether_spec.h_proto = ETHER_TYPE_FULL_MASK;
+ }
+ if (rule->filter.match_flags & IGC_FILTER_FLAG_VLAN_TCI) {
+ fsp->flow_type |= FLOW_EXT;
+ fsp->h_ext.vlan_tci = rule->filter.vlan_tci;
+ fsp->m_ext.vlan_tci = htons(VLAN_PRIO_MASK);
+ }
+ if (rule->filter.match_flags & IGC_FILTER_FLAG_DST_MAC_ADDR) {
+ ether_addr_copy(fsp->h_u.ether_spec.h_dest,
+ rule->filter.dst_addr);
+ /* As we only support matching by the full
+ * mask, return the mask to userspace
+ */
+ eth_broadcast_addr(fsp->m_u.ether_spec.h_dest);
+ }
+ if (rule->filter.match_flags & IGC_FILTER_FLAG_SRC_MAC_ADDR) {
+ ether_addr_copy(fsp->h_u.ether_spec.h_source,
+ rule->filter.src_addr);
+ /* As we only support matching by the full
+ * mask, return the mask to userspace
+ */
+ eth_broadcast_addr(fsp->m_u.ether_spec.h_source);
+ }
+
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int igc_get_ethtool_nfc_all(struct igc_adapter *adapter,
+ struct ethtool_rxnfc *cmd,
+ u32 *rule_locs)
+{
+ struct igc_nfc_filter *rule;
+ int cnt = 0;
+
+ /* report total rule count */
+ cmd->data = IGC_MAX_RXNFC_FILTERS;
+
+ hlist_for_each_entry(rule, &adapter->nfc_filter_list, nfc_node) {
+ if (cnt == cmd->rule_cnt)
+ return -EMSGSIZE;
+ rule_locs[cnt] = rule->sw_idx;
+ cnt++;
+ }
+
+ cmd->rule_cnt = cnt;
+
+ return 0;
+}
+
+static int igc_get_rss_hash_opts(struct igc_adapter *adapter,
+ struct ethtool_rxnfc *cmd)
+{
+ cmd->data = 0;
+
+ /* Report default options for RSS on igc */
+ switch (cmd->flow_type) {
+ case TCP_V4_FLOW:
+ cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
+ /* Fall through */
+ case UDP_V4_FLOW:
+ if (adapter->flags & IGC_FLAG_RSS_FIELD_IPV4_UDP)
+ cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
+ /* Fall through */
+ case SCTP_V4_FLOW:
+ /* Fall through */
+ case AH_ESP_V4_FLOW:
+ /* Fall through */
+ case AH_V4_FLOW:
+ /* Fall through */
+ case ESP_V4_FLOW:
+ /* Fall through */
+ case IPV4_FLOW:
+ cmd->data |= RXH_IP_SRC | RXH_IP_DST;
+ break;
+ case TCP_V6_FLOW:
+ cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
+ /* Fall through */
+ case UDP_V6_FLOW:
+ if (adapter->flags & IGC_FLAG_RSS_FIELD_IPV6_UDP)
+ cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
+ /* Fall through */
+ case SCTP_V6_FLOW:
+ /* Fall through */
+ case AH_ESP_V6_FLOW:
+ /* Fall through */
+ case AH_V6_FLOW:
+ /* Fall through */
+ case ESP_V6_FLOW:
+ /* Fall through */
+ case IPV6_FLOW:
+ cmd->data |= RXH_IP_SRC | RXH_IP_DST;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int igc_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
+ u32 *rule_locs)
+{
+ struct igc_adapter *adapter = netdev_priv(dev);
+ int ret = -EOPNOTSUPP;
+
+ switch (cmd->cmd) {
+ case ETHTOOL_GRXRINGS:
+ cmd->data = adapter->num_rx_queues;
+ ret = 0;
+ break;
+ case ETHTOOL_GRXCLSRLCNT:
+ cmd->rule_cnt = adapter->nfc_filter_count;
+ ret = 0;
+ break;
+ case ETHTOOL_GRXCLSRULE:
+ ret = igc_get_ethtool_nfc_entry(adapter, cmd);
+ break;
+ case ETHTOOL_GRXCLSRLALL:
+ ret = igc_get_ethtool_nfc_all(adapter, cmd, rule_locs);
+ break;
+ case ETHTOOL_GRXFH:
+ ret = igc_get_rss_hash_opts(adapter, cmd);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+#define UDP_RSS_FLAGS (IGC_FLAG_RSS_FIELD_IPV4_UDP | \
+ IGC_FLAG_RSS_FIELD_IPV6_UDP)
+static int igc_set_rss_hash_opt(struct igc_adapter *adapter,
+ struct ethtool_rxnfc *nfc)
+{
+ u32 flags = adapter->flags;
+
+ /* RSS does not support anything other than hashing
+ * to queues on src and dst IPs and ports
+ */
+ if (nfc->data & ~(RXH_IP_SRC | RXH_IP_DST |
+ RXH_L4_B_0_1 | RXH_L4_B_2_3))
+ return -EINVAL;
+
+ switch (nfc->flow_type) {
+ case TCP_V4_FLOW:
+ case TCP_V6_FLOW:
+ if (!(nfc->data & RXH_IP_SRC) ||
+ !(nfc->data & RXH_IP_DST) ||
+ !(nfc->data & RXH_L4_B_0_1) ||
+ !(nfc->data & RXH_L4_B_2_3))
+ return -EINVAL;
+ break;
+ case UDP_V4_FLOW:
+ if (!(nfc->data & RXH_IP_SRC) ||
+ !(nfc->data & RXH_IP_DST))
+ return -EINVAL;
+ switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
+ case 0:
+ flags &= ~IGC_FLAG_RSS_FIELD_IPV4_UDP;
+ break;
+ case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
+ flags |= IGC_FLAG_RSS_FIELD_IPV4_UDP;
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
+ case UDP_V6_FLOW:
+ if (!(nfc->data & RXH_IP_SRC) ||
+ !(nfc->data & RXH_IP_DST))
+ return -EINVAL;
+ switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
+ case 0:
+ flags &= ~IGC_FLAG_RSS_FIELD_IPV6_UDP;
+ break;
+ case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
+ flags |= IGC_FLAG_RSS_FIELD_IPV6_UDP;
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
+ case AH_ESP_V4_FLOW:
+ case AH_V4_FLOW:
+ case ESP_V4_FLOW:
+ case SCTP_V4_FLOW:
+ case AH_ESP_V6_FLOW:
+ case AH_V6_FLOW:
+ case ESP_V6_FLOW:
+ case SCTP_V6_FLOW:
+ if (!(nfc->data & RXH_IP_SRC) ||
+ !(nfc->data & RXH_IP_DST) ||
+ (nfc->data & RXH_L4_B_0_1) ||
+ (nfc->data & RXH_L4_B_2_3))
+ return -EINVAL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* if we changed something we need to update flags */
+ if (flags != adapter->flags) {
+ struct igc_hw *hw = &adapter->hw;
+ u32 mrqc = rd32(IGC_MRQC);
+
+ if ((flags & UDP_RSS_FLAGS) &&
+ !(adapter->flags & UDP_RSS_FLAGS))
+ dev_err(&adapter->pdev->dev,
+ "enabling UDP RSS: fragmented packets may arrive out of order to the stack above\n");
+
+ adapter->flags = flags;
+
+ /* Perform hash on these packet types */
+ mrqc |= IGC_MRQC_RSS_FIELD_IPV4 |
+ IGC_MRQC_RSS_FIELD_IPV4_TCP |
+ IGC_MRQC_RSS_FIELD_IPV6 |
+ IGC_MRQC_RSS_FIELD_IPV6_TCP;
+
+ mrqc &= ~(IGC_MRQC_RSS_FIELD_IPV4_UDP |
+ IGC_MRQC_RSS_FIELD_IPV6_UDP);
+
+ if (flags & IGC_FLAG_RSS_FIELD_IPV4_UDP)
+ mrqc |= IGC_MRQC_RSS_FIELD_IPV4_UDP;
+
+ if (flags & IGC_FLAG_RSS_FIELD_IPV6_UDP)
+ mrqc |= IGC_MRQC_RSS_FIELD_IPV6_UDP;
+
+ wr32(IGC_MRQC, mrqc);
+ }
+
+ return 0;
+}
+
+static int igc_rxnfc_write_etype_filter(struct igc_adapter *adapter,
+ struct igc_nfc_filter *input)
+{
+ struct igc_hw *hw = &adapter->hw;
+ u8 i;
+ u32 etqf;
+ u16 etype;
+
+ /* find an empty etype filter register */
+ for (i = 0; i < MAX_ETYPE_FILTER; ++i) {
+ if (!adapter->etype_bitmap[i])
+ break;
+ }
+ if (i == MAX_ETYPE_FILTER) {
+ dev_err(&adapter->pdev->dev, "ethtool -N: etype filters are all used.\n");
+ return -EINVAL;
+ }
+
+ adapter->etype_bitmap[i] = true;
+
+ etqf = rd32(IGC_ETQF(i));
+ etype = ntohs(input->filter.etype & ETHER_TYPE_FULL_MASK);
+
+ etqf |= IGC_ETQF_FILTER_ENABLE;
+ etqf &= ~IGC_ETQF_ETYPE_MASK;
+ etqf |= (etype & IGC_ETQF_ETYPE_MASK);
+
+ etqf &= ~IGC_ETQF_QUEUE_MASK;
+ etqf |= ((input->action << IGC_ETQF_QUEUE_SHIFT)
+ & IGC_ETQF_QUEUE_MASK);
+ etqf |= IGC_ETQF_QUEUE_ENABLE;
+
+ wr32(IGC_ETQF(i), etqf);
+
+ input->etype_reg_index = i;
+
+ return 0;
+}
+
+static int igc_rxnfc_write_vlan_prio_filter(struct igc_adapter *adapter,
+ struct igc_nfc_filter *input)
+{
+ struct igc_hw *hw = &adapter->hw;
+ u8 vlan_priority;
+ u16 queue_index;
+ u32 vlapqf;
+
+ vlapqf = rd32(IGC_VLAPQF);
+ vlan_priority = (ntohs(input->filter.vlan_tci) & VLAN_PRIO_MASK)
+ >> VLAN_PRIO_SHIFT;
+ queue_index = (vlapqf >> (vlan_priority * 4)) & IGC_VLAPQF_QUEUE_MASK;
+
+ /* check whether this vlan prio is already set */
+ if (vlapqf & IGC_VLAPQF_P_VALID(vlan_priority) &&
+ queue_index != input->action) {
+ dev_err(&adapter->pdev->dev, "ethtool rxnfc set vlan prio filter failed.\n");
+ return -EEXIST;
+ }
+
+ vlapqf |= IGC_VLAPQF_P_VALID(vlan_priority);
+ vlapqf |= IGC_VLAPQF_QUEUE_SEL(vlan_priority, input->action);
+
+ wr32(IGC_VLAPQF, vlapqf);
+
+ return 0;
+}
+
+int igc_add_filter(struct igc_adapter *adapter, struct igc_nfc_filter *input)
+{
+ struct igc_hw *hw = &adapter->hw;
+ int err = -EINVAL;
+
+ if (hw->mac.type == igc_i225 &&
+ !(input->filter.match_flags & ~IGC_FILTER_FLAG_SRC_MAC_ADDR)) {
+ dev_err(&adapter->pdev->dev,
+ "i225 doesn't support flow classification rules specifying only source addresses.\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (input->filter.match_flags & IGC_FILTER_FLAG_ETHER_TYPE) {
+ err = igc_rxnfc_write_etype_filter(adapter, input);
+ if (err)
+ return err;
+ }
+
+ if (input->filter.match_flags & IGC_FILTER_FLAG_DST_MAC_ADDR) {
+ err = igc_add_mac_steering_filter(adapter,
+ input->filter.dst_addr,
+ input->action, 0);
+ err = min_t(int, err, 0);
+ if (err)
+ return err;
+ }
+
+ if (input->filter.match_flags & IGC_FILTER_FLAG_SRC_MAC_ADDR) {
+ err = igc_add_mac_steering_filter(adapter,
+ input->filter.src_addr,
+ input->action,
+ IGC_MAC_STATE_SRC_ADDR);
+ err = min_t(int, err, 0);
+ if (err)
+ return err;
+ }
+
+ if (input->filter.match_flags & IGC_FILTER_FLAG_VLAN_TCI)
+ err = igc_rxnfc_write_vlan_prio_filter(adapter, input);
+
+ return err;
+}
+
+static void igc_clear_etype_filter_regs(struct igc_adapter *adapter,
+ u16 reg_index)
+{
+ struct igc_hw *hw = &adapter->hw;
+ u32 etqf = rd32(IGC_ETQF(reg_index));
+
+ etqf &= ~IGC_ETQF_QUEUE_ENABLE;
+ etqf &= ~IGC_ETQF_QUEUE_MASK;
+ etqf &= ~IGC_ETQF_FILTER_ENABLE;
+
+ wr32(IGC_ETQF(reg_index), etqf);
+
+ adapter->etype_bitmap[reg_index] = false;
+}
+
+static void igc_clear_vlan_prio_filter(struct igc_adapter *adapter,
+ u16 vlan_tci)
+{
+ struct igc_hw *hw = &adapter->hw;
+ u8 vlan_priority;
+ u32 vlapqf;
+
+ vlan_priority = (vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
+
+ vlapqf = rd32(IGC_VLAPQF);
+ vlapqf &= ~IGC_VLAPQF_P_VALID(vlan_priority);
+ vlapqf &= ~IGC_VLAPQF_QUEUE_SEL(vlan_priority,
+ IGC_VLAPQF_QUEUE_MASK);
+
+ wr32(IGC_VLAPQF, vlapqf);
+}
+
+int igc_erase_filter(struct igc_adapter *adapter, struct igc_nfc_filter *input)
+{
+ if (input->filter.match_flags & IGC_FILTER_FLAG_ETHER_TYPE)
+ igc_clear_etype_filter_regs(adapter,
+ input->etype_reg_index);
+
+ if (input->filter.match_flags & IGC_FILTER_FLAG_VLAN_TCI)
+ igc_clear_vlan_prio_filter(adapter,
+ ntohs(input->filter.vlan_tci));
+
+ if (input->filter.match_flags & IGC_FILTER_FLAG_SRC_MAC_ADDR)
+ igc_del_mac_steering_filter(adapter, input->filter.src_addr,
+ input->action,
+ IGC_MAC_STATE_SRC_ADDR);
+
+ if (input->filter.match_flags & IGC_FILTER_FLAG_DST_MAC_ADDR)
+ igc_del_mac_steering_filter(adapter, input->filter.dst_addr,
+ input->action, 0);
+
+ return 0;
+}
+
+static int igc_update_ethtool_nfc_entry(struct igc_adapter *adapter,
+ struct igc_nfc_filter *input,
+ u16 sw_idx)
+{
+ struct igc_nfc_filter *rule, *parent;
+ int err = -EINVAL;
+
+ parent = NULL;
+ rule = NULL;
+
+ hlist_for_each_entry(rule, &adapter->nfc_filter_list, nfc_node) {
+ /* hash found, or no matching entry */
+ if (rule->sw_idx >= sw_idx)
+ break;
+ parent = rule;
+ }
+
+ /* if there is an old rule occupying our place remove it */
+ if (rule && rule->sw_idx == sw_idx) {
+ if (!input)
+ err = igc_erase_filter(adapter, rule);
+
+ hlist_del(&rule->nfc_node);
+ kfree(rule);
+ adapter->nfc_filter_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;
+
+ /* initialize node */
+ INIT_HLIST_NODE(&input->nfc_node);
+
+ /* add filter to the list */
+ if (parent)
+ hlist_add_behind(&input->nfc_node, &parent->nfc_node);
+ else
+ hlist_add_head(&input->nfc_node, &adapter->nfc_filter_list);
+
+ /* update counts */
+ adapter->nfc_filter_count++;
+
+ return 0;
+}
+
+static int igc_add_ethtool_nfc_entry(struct igc_adapter *adapter,
+ struct ethtool_rxnfc *cmd)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct ethtool_rx_flow_spec *fsp =
+ (struct ethtool_rx_flow_spec *)&cmd->fs;
+ struct igc_nfc_filter *input, *rule;
+ int err = 0;
+
+ if (!(netdev->hw_features & NETIF_F_NTUPLE))
+ return -EOPNOTSUPP;
+
+ /* Don't allow programming if the action is a queue greater than
+ * the number of online Rx queues.
+ */
+ if (fsp->ring_cookie == RX_CLS_FLOW_DISC ||
+ fsp->ring_cookie >= adapter->num_rx_queues) {
+ dev_err(&adapter->pdev->dev, "ethtool -N: The specified action is invalid\n");
+ return -EINVAL;
+ }
+
+ /* Don't allow indexes to exist outside of available space */
+ if (fsp->location >= IGC_MAX_RXNFC_FILTERS) {
+ dev_err(&adapter->pdev->dev, "Location out of range\n");
+ return -EINVAL;
+ }
+
+ if ((fsp->flow_type & ~FLOW_EXT) != ETHER_FLOW)
+ return -EINVAL;
+
+ input = kzalloc(sizeof(*input), GFP_KERNEL);
+ if (!input)
+ return -ENOMEM;
+
+ if (fsp->m_u.ether_spec.h_proto == ETHER_TYPE_FULL_MASK) {
+ input->filter.etype = fsp->h_u.ether_spec.h_proto;
+ input->filter.match_flags = IGC_FILTER_FLAG_ETHER_TYPE;
+ }
+
+ /* Only support matching addresses by the full mask */
+ if (is_broadcast_ether_addr(fsp->m_u.ether_spec.h_source)) {
+ input->filter.match_flags |= IGC_FILTER_FLAG_SRC_MAC_ADDR;
+ ether_addr_copy(input->filter.src_addr,
+ fsp->h_u.ether_spec.h_source);
+ }
+
+ /* Only support matching addresses by the full mask */
+ if (is_broadcast_ether_addr(fsp->m_u.ether_spec.h_dest)) {
+ input->filter.match_flags |= IGC_FILTER_FLAG_DST_MAC_ADDR;
+ ether_addr_copy(input->filter.dst_addr,
+ fsp->h_u.ether_spec.h_dest);
+ }
+
+ if ((fsp->flow_type & FLOW_EXT) && fsp->m_ext.vlan_tci) {
+ if (fsp->m_ext.vlan_tci != htons(VLAN_PRIO_MASK)) {
+ err = -EINVAL;
+ goto err_out;
+ }
+ input->filter.vlan_tci = fsp->h_ext.vlan_tci;
+ input->filter.match_flags |= IGC_FILTER_FLAG_VLAN_TCI;
+ }
+
+ input->action = fsp->ring_cookie;
+ input->sw_idx = fsp->location;
+
+ spin_lock(&adapter->nfc_lock);
+
+ hlist_for_each_entry(rule, &adapter->nfc_filter_list, nfc_node) {
+ if (!memcmp(&input->filter, &rule->filter,
+ sizeof(input->filter))) {
+ err = -EEXIST;
+ dev_err(&adapter->pdev->dev,
+ "ethtool: this filter is already set\n");
+ goto err_out_w_lock;
+ }
+ }
+
+ err = igc_add_filter(adapter, input);
+ if (err)
+ goto err_out_w_lock;
+
+ igc_update_ethtool_nfc_entry(adapter, input, input->sw_idx);
+
+ spin_unlock(&adapter->nfc_lock);
+ return 0;
+
+err_out_w_lock:
+ spin_unlock(&adapter->nfc_lock);
+err_out:
+ kfree(input);
+ return err;
+}
+
+static int igc_del_ethtool_nfc_entry(struct igc_adapter *adapter,
+ struct ethtool_rxnfc *cmd)
+{
+ struct ethtool_rx_flow_spec *fsp =
+ (struct ethtool_rx_flow_spec *)&cmd->fs;
+ int err;
+
+ spin_lock(&adapter->nfc_lock);
+ err = igc_update_ethtool_nfc_entry(adapter, NULL, fsp->location);
+ spin_unlock(&adapter->nfc_lock);
+
+ return err;
+}
+
+static int igc_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
+{
+ struct igc_adapter *adapter = netdev_priv(dev);
+ int ret = -EOPNOTSUPP;
+
+ switch (cmd->cmd) {
+ case ETHTOOL_SRXFH:
+ ret = igc_set_rss_hash_opt(adapter, cmd);
+ break;
+ case ETHTOOL_SRXCLSRLINS:
+ ret = igc_add_ethtool_nfc_entry(adapter, cmd);
+ break;
+ case ETHTOOL_SRXCLSRLDEL:
+ ret = igc_del_ethtool_nfc_entry(adapter, cmd);
+ default:
+ break;
+ }
+
+ return ret;
+}
+
void igc_write_rss_indir_tbl(struct igc_adapter *adapter)
{
struct igc_hw *hw = &adapter->hw;
@@ -1013,6 +1613,8 @@ static const struct ethtool_ops igc_ethtool_ops = {
.set_pauseparam = igc_set_pauseparam,
.get_coalesce = igc_get_coalesce,
.set_coalesce = igc_set_coalesce,
+ .get_rxnfc = igc_get_rxnfc,
+ .set_rxnfc = igc_set_rxnfc,
.get_rxfh_indir_size = igc_get_rxfh_indir_size,
.get_rxfh = igc_get_rxfh,
.set_rxfh = igc_set_rxfh,
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index a6fe614820b6..8460894829cb 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -1793,6 +1793,29 @@ static void igc_update_stats(struct igc_adapter *adapter)
static void igc_nfc_filter_exit(struct igc_adapter *adapter)
{
+ struct igc_nfc_filter *rule;
+
+ spin_lock(&adapter->nfc_lock);
+
+ hlist_for_each_entry(rule, &adapter->nfc_filter_list, nfc_node)
+ igc_erase_filter(adapter, rule);
+
+ hlist_for_each_entry(rule, &adapter->cls_flower_list, nfc_node)
+ igc_erase_filter(adapter, rule);
+
+ spin_unlock(&adapter->nfc_lock);
+}
+
+static void igc_nfc_filter_restore(struct igc_adapter *adapter)
+{
+ struct igc_nfc_filter *rule;
+
+ spin_lock(&adapter->nfc_lock);
+
+ hlist_for_each_entry(rule, &adapter->nfc_filter_list, nfc_node)
+ igc_add_filter(adapter, rule);
+
+ spin_unlock(&adapter->nfc_lock);
}
/**
@@ -1955,6 +1978,7 @@ static void igc_configure(struct igc_adapter *adapter)
igc_setup_mrqc(adapter);
igc_setup_rctl(adapter);
+ igc_nfc_filter_restore(adapter);
igc_configure_tx(adapter);
igc_configure_rx(adapter);
@@ -2016,6 +2040,127 @@ static void igc_set_default_mac_filter(struct igc_adapter *adapter)
igc_rar_set_index(adapter, 0);
}
+/* If the filter to be added and an already existing filter express
+ * the same address and address type, it should be possible to only
+ * override the other configurations, for example the queue to steer
+ * traffic.
+ */
+static bool igc_mac_entry_can_be_used(const struct igc_mac_addr *entry,
+ const u8 *addr, const u8 flags)
+{
+ if (!(entry->state & IGC_MAC_STATE_IN_USE))
+ return true;
+
+ if ((entry->state & IGC_MAC_STATE_SRC_ADDR) !=
+ (flags & IGC_MAC_STATE_SRC_ADDR))
+ return false;
+
+ if (!ether_addr_equal(addr, entry->addr))
+ return false;
+
+ return true;
+}
+
+/* Add a MAC filter for 'addr' directing matching traffic to 'queue',
+ * 'flags' is used to indicate what kind of match is made, match is by
+ * default for the destination address, if matching by source address
+ * is desired the flag IGC_MAC_STATE_SRC_ADDR can be used.
+ */
+static int igc_add_mac_filter_flags(struct igc_adapter *adapter,
+ const u8 *addr, const u8 queue,
+ const u8 flags)
+{
+ struct igc_hw *hw = &adapter->hw;
+ int rar_entries = hw->mac.rar_entry_count;
+ int i;
+
+ if (is_zero_ether_addr(addr))
+ return -EINVAL;
+
+ /* Search for the first empty entry in the MAC table.
+ * Do not touch entries at the end of the table reserved for the VF MAC
+ * addresses.
+ */
+ for (i = 0; i < rar_entries; i++) {
+ if (!igc_mac_entry_can_be_used(&adapter->mac_table[i],
+ addr, flags))
+ continue;
+
+ ether_addr_copy(adapter->mac_table[i].addr, addr);
+ adapter->mac_table[i].queue = queue;
+ adapter->mac_table[i].state |= IGC_MAC_STATE_IN_USE | flags;
+
+ igc_rar_set_index(adapter, i);
+ return i;
+ }
+
+ return -ENOSPC;
+}
+
+int igc_add_mac_steering_filter(struct igc_adapter *adapter,
+ const u8 *addr, u8 queue, u8 flags)
+{
+ return igc_add_mac_filter_flags(adapter, addr, queue,
+ IGC_MAC_STATE_QUEUE_STEERING | flags);
+}
+
+/* Remove a MAC filter for 'addr' directing matching traffic to
+ * 'queue', 'flags' is used to indicate what kind of match need to be
+ * removed, match is by default for the destination address, if
+ * matching by source address is to be removed the flag
+ * IGC_MAC_STATE_SRC_ADDR can be used.
+ */
+static int igc_del_mac_filter_flags(struct igc_adapter *adapter,
+ const u8 *addr, const u8 queue,
+ const u8 flags)
+{
+ struct igc_hw *hw = &adapter->hw;
+ int rar_entries = hw->mac.rar_entry_count;
+ int i;
+
+ if (is_zero_ether_addr(addr))
+ return -EINVAL;
+
+ /* Search for matching entry in the MAC table based on given address
+ * and queue. Do not touch entries at the end of the table reserved
+ * for the VF MAC addresses.
+ */
+ for (i = 0; i < rar_entries; i++) {
+ if (!(adapter->mac_table[i].state & IGC_MAC_STATE_IN_USE))
+ continue;
+ if ((adapter->mac_table[i].state & flags) != flags)
+ continue;
+ if (adapter->mac_table[i].queue != queue)
+ continue;
+ if (!ether_addr_equal(adapter->mac_table[i].addr, addr))
+ continue;
+
+ /* When a filter for the default address is "deleted",
+ * we return it to its initial configuration
+ */
+ if (adapter->mac_table[i].state & IGC_MAC_STATE_DEFAULT) {
+ adapter->mac_table[i].state =
+ IGC_MAC_STATE_DEFAULT | IGC_MAC_STATE_IN_USE;
+ } else {
+ adapter->mac_table[i].state = 0;
+ adapter->mac_table[i].queue = 0;
+ memset(adapter->mac_table[i].addr, 0, ETH_ALEN);
+ }
+
+ igc_rar_set_index(adapter, i);
+ return 0;
+ }
+
+ return -ENOENT;
+}
+
+int igc_del_mac_steering_filter(struct igc_adapter *adapter,
+ const u8 *addr, u8 queue, u8 flags)
+{
+ return igc_del_mac_filter_flags(adapter, addr, queue,
+ IGC_MAC_STATE_QUEUE_STEERING | flags);
+}
+
/**
* igc_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
* @netdev: network interface device structure
diff --git a/drivers/net/ethernet/intel/igc/igc_regs.h b/drivers/net/ethernet/intel/igc/igc_regs.h
index 325109cb20cc..50d7c04dccf5 100644
--- a/drivers/net/ethernet/intel/igc/igc_regs.h
+++ b/drivers/net/ethernet/intel/igc/igc_regs.h
@@ -83,6 +83,16 @@
/* RSS registers */
#define IGC_MRQC 0x05818 /* Multiple Receive Control - RW */
+/* Filtering Registers */
+#define IGC_ETQF(_n) (0x05CB0 + (4 * (_n))) /* EType Queue Fltr */
+
+/* ETQF register bit definitions */
+#define IGC_ETQF_FILTER_ENABLE BIT(26)
+#define IGC_ETQF_QUEUE_ENABLE BIT(31)
+#define IGC_ETQF_QUEUE_SHIFT 16
+#define IGC_ETQF_QUEUE_MASK 0x00070000
+#define IGC_ETQF_ETYPE_MASK 0x0000FFFF
+
/* Redirection Table - RW Array */
#define IGC_RETA(_i) (0x05C00 + ((_i) * 4))
/* RSS Random Key - RW Array */
@@ -106,6 +116,7 @@
#define IGC_UTA 0x0A000 /* Unicast Table Array - RW */
#define IGC_RAL(_n) (0x05400 + ((_n) * 0x08))
#define IGC_RAH(_n) (0x05404 + ((_n) * 0x08))
+#define IGC_VLAPQF 0x055B0 /* VLAN Priority Queue Filter VLAPQF */
/* Transmit Register Descriptions */
#define IGC_TCTL 0x00400 /* Tx Control - RW */
--
2.20.1
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