i40e: Add a dummy packet template

The hardware requires a full packet template to be pointed to when adding
hardware flow filters.  This patch adds the template and uses it for
programming filters.

Change-ID: I09db9f4ab0207ca9c520ae36596d74e1a0663ae5
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 23 insertions, 3 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
index 2016ca074392..b886ee5bd99d 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -1243,6 +1243,7 @@ static int i40e_set_rss_hash_opt(struct i40e_pf *pf, struct ethtool_rxnfc *nfc)
 }
 
 #define IP_HEADER_OFFSET 14
+#define I40E_UDPIP_DUMMY_PACKET_LEN 42
 /**
  * i40e_add_del_fdir_udpv4 - Add/Remove UDPv4 Flow Director filters for
  * a specific flow spec
@@ -1263,6 +1264,12 @@ static int i40e_add_del_fdir_udpv4(struct i40e_vsi *vsi,
         bool err = false;
         int ret;
         int i;
+        char packet[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x08, 0,
+                         0x45, 0, 0, 0x1c, 0, 0, 0x40, 0, 0x40, 0x11,
+                         0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                         0, 0, 0, 0, 0, 0, 0, 0};
+
+        memcpy(fd_data->raw_packet, packet, I40E_UDPIP_DUMMY_PACKET_LEN);
 
         ip = (struct iphdr *)(fd_data->raw_packet + IP_HEADER_OFFSET);
         udp = (struct udphdr *)(fd_data->raw_packet + IP_HEADER_OFFSET
@@ -1293,6 +1300,7 @@ static int i40e_add_del_fdir_udpv4(struct i40e_vsi *vsi,
         return err ? -EOPNOTSUPP : 0;
 }
 
+#define I40E_TCPIP_DUMMY_PACKET_LEN 54
 /**
  * i40e_add_del_fdir_tcpv4 - Add/Remove TCPv4 Flow Director filters for
  * a specific flow spec
@@ -1312,6 +1320,14 @@ static int i40e_add_del_fdir_tcpv4(struct i40e_vsi *vsi,
         struct iphdr *ip;
         bool err = false;
         int ret;
+        /* Dummy packet */
+        char packet[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x08, 0,
+                         0x45, 0, 0, 0x28, 0, 0, 0x40, 0, 0x40, 0x6,
+                         0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                         0x80, 0x11, 0x0, 0x72, 0, 0, 0, 0};
+
+        memcpy(fd_data->raw_packet, packet, I40E_TCPIP_DUMMY_PACKET_LEN);
 
         ip = (struct iphdr *)(fd_data->raw_packet + IP_HEADER_OFFSET);
         tcp = (struct tcphdr *)(fd_data->raw_packet + IP_HEADER_OFFSET
@@ -1319,6 +1335,8 @@ static int i40e_add_del_fdir_tcpv4(struct i40e_vsi *vsi,
 
         ip->daddr = fsp->h_u.tcp_ip4_spec.ip4dst;
         tcp->dest = fsp->h_u.tcp_ip4_spec.pdst;
+        ip->saddr = fsp->h_u.tcp_ip4_spec.ip4src;
+        tcp->source = fsp->h_u.tcp_ip4_spec.psrc;
 
         fd_data->pctype = I40E_FILTER_PCTYPE_NONF_IPV4_TCP_SYN;
         ret = i40e_program_fdir_filter(fd_data, pf, add);
@@ -1333,9 +1351,6 @@ static int i40e_add_del_fdir_tcpv4(struct i40e_vsi *vsi,
                          fd_data->pctype, ret);
         }
 
-        ip->saddr = fsp->h_u.tcp_ip4_spec.ip4src;
-        tcp->source = fsp->h_u.tcp_ip4_spec.psrc;
-
         fd_data->pctype = I40E_FILTER_PCTYPE_NONF_IPV4_TCP;
 
         ret = i40e_program_fdir_filter(fd_data, pf, add);
@@ -1369,6 +1384,7 @@ static int i40e_add_del_fdir_sctpv4(struct i40e_vsi *vsi,
         return -EOPNOTSUPP;
 }
 
+#define I40E_IP_DUMMY_PACKET_LEN 34
 /**
  * i40e_add_del_fdir_ipv4 - Add/Remove IPv4 Flow Director filters for
  * a specific flow spec
@@ -1388,7 +1404,11 @@ static int i40e_add_del_fdir_ipv4(struct i40e_vsi *vsi,
         bool err = false;
         int ret;
         int i;
+        char packet[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x08, 0,
+                         0x45, 0, 0, 0x14, 0, 0, 0x40, 0, 0x40, 0x10,
+                         0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 
+        memcpy(fd_data->raw_packet, packet, I40E_IP_DUMMY_PACKET_LEN);
         ip = (struct iphdr *)(fd_data->raw_packet + IP_HEADER_OFFSET);
 
         ip->saddr = fsp->h_u.usr_ip4_spec.ip4src;