i40e: Add flow director support for IPv6

Flow director for IPv6 is not supported.
1) Implementation of support for IPv6 flow director.
2) Added handlers for addition of TCP6, UDP6, SCTP6, IPv6.
3) Refactored legacy code to make it more generic.
4) Added packet templates for TCP6, UDP6, SCTP6, IPv6.
5) Added handling of IPv6 source and destination address for flow director.
6) Improved argument passing for source and destination portin TCP6, UDP6
   and SCTP6.
7) Added handling of ethtool -n for IPv6, TCP6,UDP6, SCTP6.
8) Used correct bit flag regarding FLEXOFF field of flow director data
   descriptor.

Without this patch, there would be no support for flow director on IPv6,
TCP6, UDP6, SCTP6.
Tested based on x710 datasheet by using:
ethtool -N enp133s0f0 flow-type tcp4 src-port 13 dst-port 37 user-def 0x44142 action 1
ethtool -N enp133s0f0 flow-type tcp6 src-port 13 dst-port 40 user-def 0x44142 action 2
ethtool -N enp133s0f0 flow-type udp4 src-port 20 dst-port 40 user-def 0x44142 action 3
ethtool -N enp133s0f0 flow-type udp6 src-port 25 dst-port 40 user-def 0x44142 action 4
ethtool -N enp133s0f0 flow-type sctp4 src-port 55 dst-port 65 user-def 0x44142 action 5
ethtool -N enp133s0f0 flow-type sctp6 src-port 60 dst-port 40 user-def 0x44142 action 6
ethtool -N enp133s0f0 flow-type ip4 src-ip 1.1.1.1 dst-ip 1.1.1.4 user-def 0x44142 action 7
ethtool -N enp133s0f0 flow-type ip6 src-ip fe80::3efd:feff:fe6f:bbbb dst-ip fe80::3efd:feff:fe6f:aaaa user-def 0x44142 action 8
Then send traffic from client which matches the criteria provided to ethtool.
Observe that packets are redirected to user set queues with ethtool -S <interface>

Signed-off-by: Przemyslaw Patynowski <przemyslawx.patynowski@intel.com>
Tested-by: Tony Brelinski <tonyx.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 69 insertions, 10 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index cfb3b74ee58c..ccddf5ca0644 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -3496,6 +3496,24 @@ static void i40e_set_vsi_rx_mode(struct i40e_vsi *vsi)
 }
 
 /**
+ * i40e_reset_fdir_filter_cnt - Reset flow director filter counters
+ * @pf: Pointer to the targeted PF
+ *
+ * Set all flow director counters to 0.
+ */
+static void i40e_reset_fdir_filter_cnt(struct i40e_pf *pf)
+{
+	pf->fd_tcp4_filter_cnt = 0;
+	pf->fd_udp4_filter_cnt = 0;
+	pf->fd_sctp4_filter_cnt = 0;
+	pf->fd_ip4_filter_cnt = 0;
+	pf->fd_tcp6_filter_cnt = 0;
+	pf->fd_udp6_filter_cnt = 0;
+	pf->fd_sctp6_filter_cnt = 0;
+	pf->fd_ip6_filter_cnt = 0;
+}
+
+/**
  * i40e_fdir_filter_restore - Restore the Sideband Flow Director filters
  * @vsi: Pointer to the targeted VSI
  *
@@ -3512,10 +3530,7 @@ static void i40e_fdir_filter_restore(struct i40e_vsi *vsi)
 		return;
 
 	/* Reset FDir counters as we're replaying all existing filters */
-	pf->fd_tcp4_filter_cnt = 0;
-	pf->fd_udp4_filter_cnt = 0;
-	pf->fd_sctp4_filter_cnt = 0;
-	pf->fd_ip4_filter_cnt = 0;
+	i40e_reset_fdir_filter_cnt(pf);
 
 	hlist_for_each_entry_safe(filter, node,
 				  &pf->fdir_filter_list, fdir_node) {
@@ -8763,32 +8778,51 @@ static void i40e_fdir_filter_exit(struct i40e_pf *pf)
 	INIT_LIST_HEAD(&pf->l4_flex_pit_list);
 
 	pf->fdir_pf_active_filters = 0;
-	pf->fd_tcp4_filter_cnt = 0;
-	pf->fd_udp4_filter_cnt = 0;
-	pf->fd_sctp4_filter_cnt = 0;
-	pf->fd_ip4_filter_cnt = 0;
+	i40e_reset_fdir_filter_cnt(pf);
 
 	/* Reprogram the default input set for TCP/IPv4 */
 	i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV4_TCP,
 				I40E_L3_SRC_MASK | I40E_L3_DST_MASK |
 				I40E_L4_SRC_MASK | I40E_L4_DST_MASK);
 
+	/* Reprogram the default input set for TCP/IPv6 */
+	i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV6_TCP,
+				I40E_L3_V6_SRC_MASK | I40E_L3_V6_DST_MASK |
+				I40E_L4_SRC_MASK | I40E_L4_DST_MASK);
+
 	/* Reprogram the default input set for UDP/IPv4 */
 	i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV4_UDP,
 				I40E_L3_SRC_MASK | I40E_L3_DST_MASK |
 				I40E_L4_SRC_MASK | I40E_L4_DST_MASK);
 
+	/* Reprogram the default input set for UDP/IPv6 */
+	i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV6_UDP,
+				I40E_L3_V6_SRC_MASK | I40E_L3_V6_DST_MASK |
+				I40E_L4_SRC_MASK | I40E_L4_DST_MASK);
+
 	/* Reprogram the default input set for SCTP/IPv4 */
 	i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV4_SCTP,
 				I40E_L3_SRC_MASK | I40E_L3_DST_MASK |
 				I40E_L4_SRC_MASK | I40E_L4_DST_MASK);
 
+	/* Reprogram the default input set for SCTP/IPv6 */
+	i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV6_SCTP,
+				I40E_L3_V6_SRC_MASK | I40E_L3_V6_DST_MASK |
+				I40E_L4_SRC_MASK | I40E_L4_DST_MASK);
+
 	/* Reprogram the default input set for Other/IPv4 */
 	i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV4_OTHER,
 				I40E_L3_SRC_MASK | I40E_L3_DST_MASK);
 
 	i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_FRAG_IPV4,
 				I40E_L3_SRC_MASK | I40E_L3_DST_MASK);
+
+	/* Reprogram the default input set for Other/IPv6 */
+	i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV6_OTHER,
+				I40E_L3_SRC_MASK | I40E_L3_DST_MASK);
+
+	i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_FRAG_IPV6,
+				I40E_L3_SRC_MASK | I40E_L3_DST_MASK);
 }
 
 /**
@@ -9270,8 +9304,17 @@ static void i40e_delete_invalid_filter(struct i40e_pf *pf,
 	case SCTP_V4_FLOW:
 		pf->fd_sctp4_filter_cnt--;
 		break;
+	case TCP_V6_FLOW:
+		pf->fd_tcp6_filter_cnt--;
+		break;
+	case UDP_V6_FLOW:
+		pf->fd_udp6_filter_cnt--;
+		break;
+	case SCTP_V6_FLOW:
+		pf->fd_udp6_filter_cnt--;
+		break;
 	case IP_USER_FLOW:
-		switch (filter->ip4_proto) {
+		switch (filter->ipl4_proto) {
 		case IPPROTO_TCP:
 			pf->fd_tcp4_filter_cnt--;
 			break;
@@ -9286,6 +9329,22 @@ static void i40e_delete_invalid_filter(struct i40e_pf *pf,
 			break;
 		}
 		break;
+	case IPV6_USER_FLOW:
+		switch (filter->ipl4_proto) {
+		case IPPROTO_TCP:
+			pf->fd_tcp6_filter_cnt--;
+			break;
+		case IPPROTO_UDP:
+			pf->fd_udp6_filter_cnt--;
+			break;
+		case IPPROTO_SCTP:
+			pf->fd_sctp6_filter_cnt--;
+			break;
+		case IPPROTO_IP:
+			pf->fd_ip6_filter_cnt--;
+			break;
+		}
+		break;
 	}
 
 	/* Remove the filter from the list and free memory */
@@ -9319,7 +9378,7 @@ void i40e_fdir_check_and_reenable(struct i40e_pf *pf)
 	 * rules active.
 	 */
 	if ((fcnt_prog < (fcnt_avail - I40E_FDIR_BUFFER_HEAD_ROOM_FOR_ATR)) &&
-	    (pf->fd_tcp4_filter_cnt == 0))
+	    pf->fd_tcp4_filter_cnt == 0 && pf->fd_tcp6_filter_cnt == 0)
 		i40e_reenable_fdir_atr(pf);
 
 	/* if hw had a problem adding a filter, delete it */