@@ -111,6 +111,7 @@ struct sja1105_info {
int max_frame_mem;
int num_ports;
bool multiple_cascade_ports;
+ enum dsa_tag_protocol tag_proto;
const struct sja1105_dynamic_table_ops *dyn_ops;
const struct sja1105_table_ops *static_ops;
const struct sja1105_regs *regs;
@@ -669,6 +669,8 @@ static int sja1105_init_general_params(struct sja1105_private *priv)
.tpid2 = ETH_P_SJA1105,
/* Enable the TTEthernet engine on SJA1110 */
.tte_en = true,
+ /* Set up the EtherType for control packets on SJA1110 */
+ .header_type = ETH_P_SJA1110,
};
struct sja1105_general_params_entry *general_params;
struct dsa_switch *ds = priv->ds;
@@ -2067,7 +2069,9 @@ static enum dsa_tag_protocol
sja1105_get_tag_protocol(struct dsa_switch *ds, int port,
enum dsa_tag_protocol mp)
{
- return DSA_TAG_PROTO_SJA1105;
+ struct sja1105_private *priv = ds->priv;
+
+ return priv->info->tag_proto;
}
static int sja1105_find_free_subvlan(u16 *subvlan_map, bool pvid)
@@ -572,6 +572,7 @@ const struct sja1105_info sja1105e_info = {
.static_ops = sja1105e_table_ops,
.dyn_ops = sja1105et_dyn_ops,
.qinq_tpid = ETH_P_8021Q,
+ .tag_proto = DSA_TAG_PROTO_SJA1105,
.can_limit_mcast_flood = false,
.ptp_ts_bits = 24,
.ptpegr_ts_bytes = 4,
@@ -603,6 +604,7 @@ const struct sja1105_info sja1105t_info = {
.static_ops = sja1105t_table_ops,
.dyn_ops = sja1105et_dyn_ops,
.qinq_tpid = ETH_P_8021Q,
+ .tag_proto = DSA_TAG_PROTO_SJA1105,
.can_limit_mcast_flood = false,
.ptp_ts_bits = 24,
.ptpegr_ts_bytes = 4,
@@ -634,6 +636,7 @@ const struct sja1105_info sja1105p_info = {
.static_ops = sja1105p_table_ops,
.dyn_ops = sja1105pqrs_dyn_ops,
.qinq_tpid = ETH_P_8021AD,
+ .tag_proto = DSA_TAG_PROTO_SJA1105,
.can_limit_mcast_flood = true,
.ptp_ts_bits = 32,
.ptpegr_ts_bytes = 8,
@@ -666,6 +669,7 @@ const struct sja1105_info sja1105q_info = {
.static_ops = sja1105q_table_ops,
.dyn_ops = sja1105pqrs_dyn_ops,
.qinq_tpid = ETH_P_8021AD,
+ .tag_proto = DSA_TAG_PROTO_SJA1105,
.can_limit_mcast_flood = true,
.ptp_ts_bits = 32,
.ptpegr_ts_bytes = 8,
@@ -698,6 +702,7 @@ const struct sja1105_info sja1105r_info = {
.static_ops = sja1105r_table_ops,
.dyn_ops = sja1105pqrs_dyn_ops,
.qinq_tpid = ETH_P_8021AD,
+ .tag_proto = DSA_TAG_PROTO_SJA1105,
.can_limit_mcast_flood = true,
.ptp_ts_bits = 32,
.ptpegr_ts_bytes = 8,
@@ -734,6 +739,7 @@ const struct sja1105_info sja1105s_info = {
.dyn_ops = sja1105pqrs_dyn_ops,
.regs = &sja1105pqrs_regs,
.qinq_tpid = ETH_P_8021AD,
+ .tag_proto = DSA_TAG_PROTO_SJA1105,
.can_limit_mcast_flood = true,
.ptp_ts_bits = 32,
.ptpegr_ts_bytes = 8,
@@ -769,6 +775,7 @@ const struct sja1105_info sja1110a_info = {
.dyn_ops = sja1110_dyn_ops,
.regs = &sja1110_regs,
.qinq_tpid = ETH_P_8021AD,
+ .tag_proto = DSA_TAG_PROTO_SJA1110,
.can_limit_mcast_flood = true,
.multiple_cascade_ports = true,
.ptp_ts_bits = 32,
@@ -817,6 +824,7 @@ const struct sja1105_info sja1110b_info = {
.dyn_ops = sja1110_dyn_ops,
.regs = &sja1110_regs,
.qinq_tpid = ETH_P_8021AD,
+ .tag_proto = DSA_TAG_PROTO_SJA1110,
.can_limit_mcast_flood = true,
.multiple_cascade_ports = true,
.ptp_ts_bits = 32,
@@ -865,6 +873,7 @@ const struct sja1105_info sja1110c_info = {
.dyn_ops = sja1110_dyn_ops,
.regs = &sja1110_regs,
.qinq_tpid = ETH_P_8021AD,
+ .tag_proto = DSA_TAG_PROTO_SJA1110,
.can_limit_mcast_flood = true,
.multiple_cascade_ports = true,
.ptp_ts_bits = 32,
@@ -913,6 +922,7 @@ const struct sja1105_info sja1110d_info = {
.dyn_ops = sja1110_dyn_ops,
.regs = &sja1110_regs,
.qinq_tpid = ETH_P_8021AD,
+ .tag_proto = DSA_TAG_PROTO_SJA1110,
.can_limit_mcast_flood = true,
.multiple_cascade_ports = true,
.ptp_ts_bits = 32,
@@ -212,6 +212,7 @@ size_t sja1110_general_params_entry_packing(void *buf, void *entry_ptr,
sja1105_packing(buf, &entry->egrmirrdei, 110, 110, size, op);
sja1105_packing(buf, &entry->replay_port, 109, 106, size, op);
sja1105_packing(buf, &entry->tdmaconfigidx, 70, 67, size, op);
+ sja1105_packing(buf, &entry->header_type, 64, 49, size, op);
sja1105_packing(buf, &entry->tte_en, 16, 16, size, op);
return size;
}
@@ -217,6 +217,7 @@ struct sja1105_general_params_entry {
/* SJA1110 only */
u64 tte_en;
u64 tdmaconfigidx;
+ u64 header_type;
};
struct sja1105_schedule_entry_points_entry {
@@ -14,6 +14,7 @@
#define ETH_P_SJA1105 ETH_P_DSA_8021Q
#define ETH_P_SJA1105_META 0x0008
+#define ETH_P_SJA1110 0xdadc
/* IEEE 802.3 Annex 57A: Slow Protocols PDUs (01:80:C2:xx:xx:xx) */
#define SJA1105_LINKLOCAL_FILTER_A 0x0180C2000000ull
@@ -50,6 +50,7 @@ struct phylink_link_state;
#define DSA_TAG_PROTO_OCELOT_8021Q_VALUE 20
#define DSA_TAG_PROTO_SEVILLE_VALUE 21
#define DSA_TAG_PROTO_BRCM_LEGACY_VALUE 22
+#define DSA_TAG_PROTO_SJA1110_VALUE 23
enum dsa_tag_protocol {
DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE,
@@ -75,6 +76,7 @@ enum dsa_tag_protocol {
DSA_TAG_PROTO_XRS700X = DSA_TAG_PROTO_XRS700X_VALUE,
DSA_TAG_PROTO_OCELOT_8021Q = DSA_TAG_PROTO_OCELOT_8021Q_VALUE,
DSA_TAG_PROTO_SEVILLE = DSA_TAG_PROTO_SEVILLE_VALUE,
+ DSA_TAG_PROTO_SJA1110 = DSA_TAG_PROTO_SJA1110_VALUE,
};
struct packet_type;
@@ -7,6 +7,47 @@
#include <linux/packing.h>
#include "dsa_priv.h"
+/* Is this a TX or an RX header? */
+#define SJA1110_HEADER_HOST_TO_SWITCH BIT(15)
+
+/* RX header */
+#define SJA1110_RX_HEADER_IS_METADATA BIT(14)
+#define SJA1110_RX_HEADER_HOST_ONLY BIT(13)
+#define SJA1110_RX_HEADER_HAS_TRAILER BIT(12)
+
+/* Trap-to-host format (no trailer present) */
+#define SJA1110_RX_HEADER_SRC_PORT(x) (((x) & GENMASK(7, 4)) >> 4)
+#define SJA1110_RX_HEADER_SWITCH_ID(x) ((x) & GENMASK(3, 0))
+
+/* Timestamp format (trailer present) */
+#define SJA1110_RX_HEADER_TRAILER_POS(x) ((x) & GENMASK(11, 0))
+
+#define SJA1110_RX_TRAILER_SWITCH_ID(x) (((x) & GENMASK(7, 4)) >> 4)
+#define SJA1110_RX_TRAILER_SRC_PORT(x) ((x) & GENMASK(3, 0))
+
+/* TX header */
+#define SJA1110_TX_HEADER_UPDATE_TC BIT(14)
+#define SJA1110_TX_HEADER_TAKE_TS BIT(13)
+#define SJA1110_TX_HEADER_TAKE_TS_CASC BIT(12)
+#define SJA1110_TX_HEADER_HAS_TRAILER BIT(11)
+
+/* Only valid if SJA1110_TX_HEADER_HAS_TRAILER is false */
+#define SJA1110_TX_HEADER_PRIO(x) (((x) << 7) & GENMASK(10, 7))
+#define SJA1110_TX_HEADER_TSTAMP_ID(x) ((x) & GENMASK(7, 0))
+
+/* Only valid if SJA1110_TX_HEADER_HAS_TRAILER is true */
+#define SJA1110_TX_HEADER_TRAILER_POS(x) ((x) & GENMASK(10, 0))
+
+#define SJA1110_TX_TRAILER_TSTAMP_ID(x) (((x) << 24) & GENMASK(31, 24))
+#define SJA1110_TX_TRAILER_PRIO(x) (((x) << 21) & GENMASK(23, 21))
+#define SJA1110_TX_TRAILER_SWITCHID(x) (((x) << 12) & GENMASK(15, 12))
+#define SJA1110_TX_TRAILER_DESTPORTS(x) (((x) << 1) & GENMASK(11, 1))
+
+#define SJA1110_HEADER_LEN 4
+#define SJA1110_RX_TRAILER_LEN 13
+#define SJA1110_TX_TRAILER_LEN 4
+#define SJA1110_MAX_PADDING_LEN 15
+
/* Similar to is_link_local_ether_addr(hdr->h_dest) but also covers PTP */
static inline bool sja1105_is_link_local(const struct sk_buff *skb)
{
@@ -140,6 +181,50 @@ static struct sk_buff *sja1105_xmit(struct sk_buff *skb,
((pcp << VLAN_PRIO_SHIFT) | tx_vid));
}
+static struct sk_buff *sja1110_xmit(struct sk_buff *skb,
+ struct net_device *netdev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(netdev);
+ u16 tx_vid = dsa_8021q_tx_vid(dp->ds, dp->index);
+ u16 queue_mapping = skb_get_queue_mapping(skb);
+ u8 pcp = netdev_txq_to_tc(netdev, queue_mapping);
+ struct ethhdr *eth_hdr;
+ __be32 *tx_trailer;
+ __be16 *tx_header;
+ int trailer_pos;
+
+ /* Transmitting control packets is done using in-band control
+ * extensions, while data packets are transmitted using
+ * tag_8021q TX VLANs.
+ */
+ if (likely(!sja1105_is_link_local(skb)))
+ return dsa_8021q_xmit(skb, netdev, sja1105_xmit_tpid(dp->priv),
+ ((pcp << VLAN_PRIO_SHIFT) | tx_vid));
+
+ skb_push(skb, SJA1110_HEADER_LEN);
+
+ /* Move Ethernet header to the left, making space for DSA tag */
+ memmove(skb->data, skb->data + SJA1110_HEADER_LEN, 2 * ETH_ALEN);
+
+ trailer_pos = skb->len;
+
+ /* On TX, skb->data points to skb_mac_header(skb) */
+ eth_hdr = (struct ethhdr *)skb->data;
+ tx_header = (__be16 *)(eth_hdr + 1);
+ tx_trailer = skb_put(skb, SJA1110_TX_TRAILER_LEN);
+
+ eth_hdr->h_proto = htons(ETH_P_SJA1110);
+
+ *tx_header = htons(SJA1110_HEADER_HOST_TO_SWITCH |
+ SJA1110_TX_HEADER_HAS_TRAILER |
+ SJA1110_TX_HEADER_TRAILER_POS(trailer_pos));
+ *tx_trailer = cpu_to_be32(SJA1110_TX_TRAILER_PRIO(pcp) |
+ SJA1110_TX_TRAILER_SWITCHID(dp->ds->index) |
+ SJA1110_TX_TRAILER_DESTPORTS(BIT(dp->index)));
+
+ return skb;
+}
+
static void sja1105_transfer_meta(struct sk_buff *skb,
const struct sja1105_meta *meta)
{
@@ -283,6 +368,11 @@ static bool sja1105_skb_has_tag_8021q(const struct sk_buff *skb)
skb_vlan_tag_present(skb);
}
+static bool sja1110_skb_has_inband_control_extension(const struct sk_buff *skb)
+{
+ return ntohs(eth_hdr(skb)->h_proto) == ETH_P_SJA1110;
+}
+
static struct sk_buff *sja1105_rcv(struct sk_buff *skb,
struct net_device *netdev,
struct packet_type *pt)
@@ -333,6 +423,98 @@ static struct sk_buff *sja1105_rcv(struct sk_buff *skb,
is_meta);
}
+static struct sk_buff *sja1110_rcv_inband_control_extension(struct sk_buff *skb,
+ int *source_port,
+ int *switch_id)
+{
+ u16 rx_header;
+
+ if (unlikely(!pskb_may_pull(skb, SJA1110_HEADER_LEN)))
+ return NULL;
+
+ /* skb->data points to skb_mac_header(skb) + ETH_HLEN, which is exactly
+ * what we need because the caller has checked the EtherType (which is
+ * located 2 bytes back) and we just need a pointer to the header that
+ * comes afterwards.
+ */
+ rx_header = ntohs(*(__be16 *)skb->data);
+
+ /* Timestamp frame, we have a trailer */
+ if (rx_header & SJA1110_RX_HEADER_HAS_TRAILER) {
+ int start_of_padding = SJA1110_RX_HEADER_TRAILER_POS(rx_header);
+ u8 *rx_trailer = skb_tail_pointer(skb) - SJA1110_RX_TRAILER_LEN;
+ u64 *tstamp = &SJA1105_SKB_CB(skb)->tstamp;
+ u8 last_byte = rx_trailer[12];
+
+ /* The timestamp is unaligned, so we need to use packing()
+ * to get it
+ */
+ packing(rx_trailer, tstamp, 63, 0, 8, UNPACK, 0);
+
+ *source_port = SJA1110_RX_TRAILER_SRC_PORT(last_byte);
+ *switch_id = SJA1110_RX_TRAILER_SWITCH_ID(last_byte);
+
+ /* skb->len counts from skb->data, while start_of_padding
+ * counts from the destination MAC address. Right now skb->data
+ * is still as set by the DSA master, so to trim away the
+ * padding and trailer we need to account for the fact that
+ * skb->data points to skb_mac_header(skb) + ETH_HLEN.
+ */
+ pskb_trim_rcsum(skb, start_of_padding - ETH_HLEN);
+ /* Trap-to-host frame, no timestamp trailer */
+ } else {
+ *source_port = SJA1110_RX_HEADER_SRC_PORT(rx_header);
+ *switch_id = SJA1110_RX_HEADER_SWITCH_ID(rx_header);
+ }
+
+ /* Advance skb->data past the DSA header */
+ skb_pull_rcsum(skb, SJA1110_HEADER_LEN);
+
+ /* Remove the DSA header */
+ memmove(skb->data - ETH_HLEN, skb->data - ETH_HLEN - SJA1110_HEADER_LEN,
+ 2 * ETH_ALEN);
+
+ /* With skb->data in its final place, update the MAC header
+ * so that eth_hdr() continues to works properly.
+ */
+ skb_set_mac_header(skb, -ETH_HLEN);
+
+ return skb;
+}
+
+static struct sk_buff *sja1110_rcv(struct sk_buff *skb,
+ struct net_device *netdev,
+ struct packet_type *pt)
+{
+ int source_port = -1, switch_id = -1, subvlan = 0;
+
+ skb->offload_fwd_mark = 1;
+
+ if (sja1110_skb_has_inband_control_extension(skb)) {
+ skb = sja1110_rcv_inband_control_extension(skb, &source_port,
+ &switch_id);
+ if (!skb)
+ return NULL;
+ }
+
+ /* Packets with in-band control extensions might still have RX VLANs */
+ if (likely(sja1105_skb_has_tag_8021q(skb)))
+ dsa_8021q_rcv(skb, &source_port, &switch_id, &subvlan);
+
+ skb->dev = dsa_master_find_slave(netdev, switch_id, source_port);
+ if (!skb->dev) {
+ netdev_warn(netdev,
+ "Couldn't decode source port %d and switch id %d\n",
+ source_port, switch_id);
+ return NULL;
+ }
+
+ if (subvlan)
+ sja1105_decode_subvlan(skb, subvlan);
+
+ return skb;
+}
+
static void sja1105_flow_dissect(const struct sk_buff *skb, __be16 *proto,
int *offset)
{
@@ -343,6 +525,20 @@ static void sja1105_flow_dissect(const struct sk_buff *skb, __be16 *proto,
dsa_tag_generic_flow_dissect(skb, proto, offset);
}
+static void sja1110_flow_dissect(const struct sk_buff *skb, __be16 *proto,
+ int *offset)
+{
+ /* Management frames have 2 DSA tags on RX, so the needed_headroom we
+ * declared is fine for the generic dissector adjustment procedure.
+ */
+ if (unlikely(sja1105_is_link_local(skb)))
+ return dsa_tag_generic_flow_dissect(skb, proto, offset);
+
+ /* For the rest, there is a single DSA tag, the tag_8021q one */
+ *offset = VLAN_HLEN;
+ *proto = ((__be16 *)skb->data)[(VLAN_HLEN / 2) - 1];
+}
+
static const struct dsa_device_ops sja1105_netdev_ops = {
.name = "sja1105",
.proto = DSA_TAG_PROTO_SJA1105,
@@ -354,7 +550,28 @@ static const struct dsa_device_ops sja1105_netdev_ops = {
.promisc_on_master = true,
};
-MODULE_LICENSE("GPL v2");
+DSA_TAG_DRIVER(sja1105_netdev_ops);
MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_SJA1105);
-module_dsa_tag_driver(sja1105_netdev_ops);
+static const struct dsa_device_ops sja1110_netdev_ops = {
+ .name = "sja1110",
+ .proto = DSA_TAG_PROTO_SJA1110,
+ .xmit = sja1110_xmit,
+ .rcv = sja1110_rcv,
+ .filter = sja1105_filter,
+ .flow_dissect = sja1110_flow_dissect,
+ .needed_headroom = SJA1110_HEADER_LEN + VLAN_HLEN,
+ .needed_tailroom = SJA1110_RX_TRAILER_LEN + SJA1110_MAX_PADDING_LEN,
+};
+
+DSA_TAG_DRIVER(sja1110_netdev_ops);
+MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_SJA1110);
+
+static struct dsa_tag_driver *sja1105_tag_driver_array[] = {
+ &DSA_TAG_DRIVER_NAME(sja1105_netdev_ops),
+ &DSA_TAG_DRIVER_NAME(sja1110_netdev_ops),
+};
+
+module_dsa_tag_drivers(sja1105_tag_driver_array);
+
+MODULE_LICENSE("GPL v2");