sfc: Generalise filter spec initialisation

Move search_depth arrays into per-table state.

Define initialisation function efx_filter_init_rx() which sets
everything apart from the match fields.

Define efx_filter_set_{ipv4_local,ipv4_full,eth_local}() to set the
match fields.  This allows some simplification of callers and later
support for additional protocols and more flexible matching using
multiple calls to these functions.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

1 files changed, 36 insertions, 46 deletions

diff --git a/drivers/net/sfc/ethtool.c b/drivers/net/sfc/ethtool.c
index 0f46c1a3171..5e50e57b0ae 100644
--- a/drivers/net/sfc/ethtool.c
+++ b/drivers/net/sfc/ethtool.c
@@ -11,6 +11,7 @@
 #include <linux/netdevice.h>
 #include <linux/ethtool.h>
 #include <linux/rtnetlink.h>
+#include <linux/in.h>
 #include "net_driver.h"
 #include "workarounds.h"
 #include "selftest.h"
@@ -920,6 +921,7 @@ static int efx_ethtool_set_rx_ntuple(struct net_device *net_dev,
         struct ethhdr *mac_entry = &ntuple->fs.h_u.ether_spec;
         struct ethhdr *mac_mask = &ntuple->fs.m_u.ether_spec;
         struct efx_filter_spec filter;
+        int rc;
 
         /* Range-check action */
         if (ntuple->fs.action < ETHTOOL_RXNTUPLE_ACTION_CLEAR ||
@@ -929,9 +931,16 @@ static int efx_ethtool_set_rx_ntuple(struct net_device *net_dev,
         if (~ntuple->fs.data_mask)
                 return -EINVAL;
 
+        efx_filter_init_rx(&filter, EFX_FILTER_PRI_MANUAL, 0,
+                           (ntuple->fs.action == ETHTOOL_RXNTUPLE_ACTION_DROP) ?
+                           0xfff : ntuple->fs.action);
+
         switch (ntuple->fs.flow_type) {
         case TCP_V4_FLOW:
-        case UDP_V4_FLOW:
+        case UDP_V4_FLOW: {
+                u8 proto = (ntuple->fs.flow_type == TCP_V4_FLOW ?
+                            IPPROTO_TCP : IPPROTO_UDP);
+
                 /* Must match all of destination, */
                 if (ip_mask->ip4dst | ip_mask->pdst)
                         return -EINVAL;
@@ -943,7 +952,22 @@ static int efx_ethtool_set_rx_ntuple(struct net_device *net_dev,
                 /* and nothing else */
                 if ((u8)~ip_mask->tos | (u16)~ntuple->fs.vlan_tag_mask)
                         return -EINVAL;
+
+                if (!ip_mask->ip4src)
+                        rc = efx_filter_set_ipv4_full(&filter, proto,
+                                                      ip_entry->ip4dst,
+                                                      ip_entry->pdst,
+                                                      ip_entry->ip4src,
+                                                      ip_entry->psrc);
+                else
+                        rc = efx_filter_set_ipv4_local(&filter, proto,
+                                                       ip_entry->ip4dst,
+                                                       ip_entry->pdst);
+                if (rc)
+                        return rc;
                 break;
+        }
+
         case ETHER_FLOW:
                 /* Must match all of destination, */
                 if (!is_zero_ether_addr(mac_mask->h_dest))
@@ -956,58 +980,24 @@ static int efx_ethtool_set_rx_ntuple(struct net_device *net_dev,
                 if (!is_broadcast_ether_addr(mac_mask->h_source) ||
                     mac_mask->h_proto != htons(0xffff))
                         return -EINVAL;
+
+                rc = efx_filter_set_eth_local(
+                        &filter,
+                        (ntuple->fs.vlan_tag_mask == 0xf000) ?
+                        ntuple->fs.vlan_tag : EFX_FILTER_VID_UNSPEC,
+                        mac_entry->h_dest);
+                if (rc)
+                        return rc;
                 break;
+
         default:
                 return -EINVAL;
         }
 
-        filter.priority = EFX_FILTER_PRI_MANUAL;
-        filter.flags = 0;
-
-        switch (ntuple->fs.flow_type) {
-        case TCP_V4_FLOW:
-                if (!ip_mask->ip4src)
-                        efx_filter_set_rx_tcp_full(&filter,
-                                                   htonl(ip_entry->ip4src),
-                                                   htons(ip_entry->psrc),
-                                                   htonl(ip_entry->ip4dst),
-                                                   htons(ip_entry->pdst));
-                else
-                        efx_filter_set_rx_tcp_wild(&filter,
-                                                   htonl(ip_entry->ip4dst),
-                                                   htons(ip_entry->pdst));
-                break;
-        case UDP_V4_FLOW:
-                if (!ip_mask->ip4src)
-                        efx_filter_set_rx_udp_full(&filter,
-                                                   htonl(ip_entry->ip4src),
-                                                   htons(ip_entry->psrc),
-                                                   htonl(ip_entry->ip4dst),
-                                                   htons(ip_entry->pdst));
-                else
-                        efx_filter_set_rx_udp_wild(&filter,
-                                                   htonl(ip_entry->ip4dst),
-                                                   htons(ip_entry->pdst));
-                break;
-        case ETHER_FLOW:
-                if (ntuple->fs.vlan_tag_mask == 0xf000)
-                        efx_filter_set_rx_mac_full(&filter,
-                                                   ntuple->fs.vlan_tag & 0xfff,
-                                                   mac_entry->h_dest);
-                else
-                        efx_filter_set_rx_mac_wild(&filter, mac_entry->h_dest);
-                break;
-        }
-
-        if (ntuple->fs.action == ETHTOOL_RXNTUPLE_ACTION_CLEAR) {
+        if (ntuple->fs.action == ETHTOOL_RXNTUPLE_ACTION_CLEAR)
                 return efx_filter_remove_filter(efx, &filter);
-        } else {
-                if (ntuple->fs.action == ETHTOOL_RXNTUPLE_ACTION_DROP)
-                        filter.dmaq_id = 0xfff;
-                else
-                        filter.dmaq_id = ntuple->fs.action;
+        else
                 return efx_filter_insert_filter(efx, &filter, true);
-        }
 }
 
 static int efx_ethtool_get_rxfh_indir(struct net_device *net_dev,