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authorGangfeng Huang <gangfeng.huang@ni.com>2016-07-06 13:22:55 +0800
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2016-08-18 22:27:48 -0700
commit64c75d41ace516b7e4f0f187f91282aa43a51b38 (patch)
treec21b79ff1f7a52789221d114453fed52d286310b /drivers/net/ethernet/intel/igb
parentigb: add support of RX network flow classification (diff)
downloadlinux-dev-64c75d41ace516b7e4f0f187f91282aa43a51b38.tar.xz
linux-dev-64c75d41ace516b7e4f0f187f91282aa43a51b38.zip
igb: support RX flow classification by ethertype
This patch is meant to allow for RX network flow classification to insert and remove ethertype filter by ethtool Example: Add an ethertype filter: $ ethtool -N eth0 flow-type ether proto 0x88F8 action 2 Show all filters: $ ethtool -n eth0 4 RX rings available Total 1 rules Filter: 15 Flow Type: Raw Ethernet Src MAC addr: 00:00:00:00:00:00 mask: FF:FF:FF:FF:FF:FF Dest MAC addr: 00:00:00:00:00:00 mask: FF:FF:FF:FF:FF:FF Ethertype: 0x88F8 mask: 0x0 Action: Direct to queue 2 Delete the filter by location: $ ethtool -N delete 15 Signed-off-by: Ruhao Gao <ruhao.gao@ni.com> Signed-off-by: Gangfeng Huang <gangfeng.huang@ni.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/igb')
-rw-r--r--drivers/net/ethernet/intel/igb/e1000_82575.h5
-rw-r--r--drivers/net/ethernet/intel/igb/igb.h21
-rw-r--r--drivers/net/ethernet/intel/igb/igb_ethtool.c77
-rw-r--r--drivers/net/ethernet/intel/igb/igb_ptp.c4
4 files changed, 101 insertions, 6 deletions
diff --git a/drivers/net/ethernet/intel/igb/e1000_82575.h b/drivers/net/ethernet/intel/igb/e1000_82575.h
index 199ff98209cf..acf06051e111 100644
--- a/drivers/net/ethernet/intel/igb/e1000_82575.h
+++ b/drivers/net/ethernet/intel/igb/e1000_82575.h
@@ -188,6 +188,11 @@ struct e1000_adv_tx_context_desc {
/* ETQF register bit definitions */
#define E1000_ETQF_FILTER_ENABLE BIT(26)
#define E1000_ETQF_1588 BIT(30)
+#define E1000_ETQF_IMM_INT BIT(29)
+#define E1000_ETQF_QUEUE_ENABLE BIT(31)
+#define E1000_ETQF_QUEUE_SHIFT 16
+#define E1000_ETQF_QUEUE_MASK 0x00070000
+#define E1000_ETQF_ETYPE_MASK 0x0000FFFF
/* FTQF register bit definitions */
#define E1000_FTQF_VF_BP 0x00008000
diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index 37f82ca91141..5c5075819bac 100644
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -350,13 +350,24 @@ struct hwmon_buff {
};
#endif
+/* The number of L2 ether-type filter registers, Index 3 is reserved
+ * for PTP 1588 timestamp
+ */
+#define MAX_ETYPE_FILTER (4 - 1)
+/* ETQF filter list: one static filter per filter consumer. This is
+ * to avoid filter collisions later. Add new filters here!!
+ *
+ * Current filters: Filter 3
+ */
+#define IGB_ETQF_FILTER_1588 3
+
#define IGB_N_EXTTS 2
#define IGB_N_PEROUT 2
#define IGB_N_SDP 4
#define IGB_RETA_SIZE 128
enum igb_filter_match_flags {
- IGB_FILTER_FLAG_NONE = 0x0,
+ IGB_FILTER_FLAG_ETHER_TYPE = 0x1,
};
#define IGB_MAX_RXNFC_FILTERS 16
@@ -364,14 +375,17 @@ enum igb_filter_match_flags {
/* RX network flow classification data structure */
struct igb_nfc_input {
/* Byte layout in order, all values with MSB first:
- * match_flags - 1 byte
- */
+ * match_flags - 1 byte
+ * etype - 2 bytes
+ */
u8 match_flags;
+ __be16 etype;
};
struct igb_nfc_filter {
struct hlist_node nfc_node;
struct igb_nfc_input filter;
+ u16 etype_reg_index;
u16 sw_idx;
u16 action;
};
@@ -500,6 +514,7 @@ struct igb_adapter {
unsigned int nfc_filter_count;
/* lock for RX network flow classification filter */
spinlock_t nfc_lock;
+ bool etype_bitmap[MAX_ETYPE_FILTER];
};
/* flags controlling PTP/1588 function */
diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c
index 2599826bbec7..00e33879a76c 100644
--- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
+++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
@@ -2431,6 +2431,7 @@ static int igb_get_ts_info(struct net_device *dev,
}
}
+#define ETHER_TYPE_FULL_MASK ((__force __be16)~0)
static int igb_get_ethtool_nfc_entry(struct igb_adapter *adapter,
struct ethtool_rxnfc *cmd)
{
@@ -2448,6 +2449,13 @@ static int igb_get_ethtool_nfc_entry(struct igb_adapter *adapter,
if (!rule || fsp->location != rule->sw_idx)
return -EINVAL;
+ if (rule->filter.match_flags & IGB_FILTER_FLAG_ETHER_TYPE) {
+ fsp->flow_type = ETHER_FLOW;
+ fsp->ring_cookie = rule->action;
+ fsp->h_u.ether_spec.h_proto = rule->filter.etype;
+ fsp->m_u.ether_spec.h_proto = ETHER_TYPE_FULL_MASK;
+ return 0;
+ }
return -EINVAL;
}
@@ -2650,13 +2658,75 @@ static int igb_set_rss_hash_opt(struct igb_adapter *adapter,
return 0;
}
+static int igb_rxnfc_write_etype_filter(struct igb_adapter *adapter,
+ struct igb_nfc_filter *input)
+{
+ struct e1000_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(E1000_ETQF(i));
+ etype = ntohs(input->filter.etype & ETHER_TYPE_FULL_MASK);
+
+ etqf |= E1000_ETQF_FILTER_ENABLE;
+ etqf &= ~E1000_ETQF_ETYPE_MASK;
+ etqf |= (etype & E1000_ETQF_ETYPE_MASK);
+
+ etqf &= ~E1000_ETQF_QUEUE_MASK;
+ etqf |= ((input->action << E1000_ETQF_QUEUE_SHIFT)
+ & E1000_ETQF_QUEUE_MASK);
+ etqf |= E1000_ETQF_QUEUE_ENABLE;
+
+ wr32(E1000_ETQF(i), etqf);
+
+ input->etype_reg_index = i;
+
+ return 0;
+}
+
int igb_add_filter(struct igb_adapter *adapter, struct igb_nfc_filter *input)
{
- return -EINVAL;
+ int err = -EINVAL;
+
+ if (input->filter.match_flags & IGB_FILTER_FLAG_ETHER_TYPE)
+ err = igb_rxnfc_write_etype_filter(adapter, input);
+
+ return err;
+}
+
+static void igb_clear_etype_filter_regs(struct igb_adapter *adapter,
+ u16 reg_index)
+{
+ struct e1000_hw *hw = &adapter->hw;
+ u32 etqf = rd32(E1000_ETQF(reg_index));
+
+ etqf &= ~E1000_ETQF_QUEUE_ENABLE;
+ etqf &= ~E1000_ETQF_QUEUE_MASK;
+ etqf &= ~E1000_ETQF_FILTER_ENABLE;
+
+ wr32(E1000_ETQF(reg_index), etqf);
+
+ adapter->etype_bitmap[reg_index] = false;
}
int igb_erase_filter(struct igb_adapter *adapter, struct igb_nfc_filter *input)
{
+ if (input->filter.match_flags & IGB_FILTER_FLAG_ETHER_TYPE)
+ igb_clear_etype_filter_regs(adapter,
+ input->etype_reg_index);
return 0;
}
@@ -2738,10 +2808,15 @@ static int igb_add_ethtool_nfc_entry(struct igb_adapter *adapter,
if ((fsp->flow_type & ~FLOW_EXT) != ETHER_FLOW)
return -EINVAL;
+ if (fsp->m_u.ether_spec.h_proto != ETHER_TYPE_FULL_MASK)
+ return -EINVAL;
+
input = kzalloc(sizeof(*input), GFP_KERNEL);
if (!input)
return -ENOMEM;
+ input->filter.etype = fsp->h_u.ether_spec.h_proto;
+ input->filter.match_flags = IGB_FILTER_FLAG_ETHER_TYPE;
input->action = fsp->ring_cookie;
input->sw_idx = fsp->location;
diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c
index 336c103ae374..66dfa2085cc7 100644
--- a/drivers/net/ethernet/intel/igb/igb_ptp.c
+++ b/drivers/net/ethernet/intel/igb/igb_ptp.c
@@ -998,12 +998,12 @@ static int igb_ptp_set_timestamp_mode(struct igb_adapter *adapter,
/* define ethertype filter for timestamped packets */
if (is_l2)
- wr32(E1000_ETQF(3),
+ wr32(E1000_ETQF(IGB_ETQF_FILTER_1588),
(E1000_ETQF_FILTER_ENABLE | /* enable filter */
E1000_ETQF_1588 | /* enable timestamping */
ETH_P_1588)); /* 1588 eth protocol type */
else
- wr32(E1000_ETQF(3), 0);
+ wr32(E1000_ETQF(IGB_ETQF_FILTER_1588), 0);
/* L4 Queue Filter[3]: filter by destination port and protocol */
if (is_l4) {