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net: dsa: yt921x: Add port police support
Enable rate meter ability and support limiting the rate of incoming traffic. Signed-off-by: David Yang <mmyangfl@gmail.com> Link: https://patch.msgid.link/20260430114529.3536911-4-mmyangfl@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
David Yang
Jakub Kicinski
parent
9f8888984e
commit
39716c00ed
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@ -263,6 +263,14 @@ yt921x_reg_toggle_bits(struct yt921x_priv *priv, u32 reg, u32 mask, bool set)
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* eliminate potential issues, although partial reads/writes are also possible.
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*/
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static void update_ctrls_unaligned(u32 *lo, u32 *hi, u64 mask, u64 val)
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{
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*lo &= ~lower_32_bits(mask);
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*hi &= ~upper_32_bits(mask);
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*lo |= lower_32_bits(val);
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*hi |= upper_32_bits(val);
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}
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static int
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yt921x_regs_read(struct yt921x_priv *priv, u32 reg, u32 *vals,
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unsigned int num_regs)
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@ -373,6 +381,12 @@ yt921x_reg64_clear_bits(struct yt921x_priv *priv, u32 reg, const u32 *masks)
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return yt921x_regs_clear_bits(priv, reg, masks, 2);
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}
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static int
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yt921x_reg96_write(struct yt921x_priv *priv, u32 reg, const u32 *vals)
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{
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return yt921x_regs_write(priv, reg, vals, 3);
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}
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static int yt921x_reg_mdio_read(void *context, u32 reg, u32 *valp)
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{
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struct yt921x_reg_mdio *mdio = context;
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@ -1066,6 +1080,13 @@ yt921x_dsa_set_mac_eee(struct dsa_switch *ds, int port, struct ethtool_keee *e)
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return res;
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}
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static int yt921x_mtu_fetch(struct yt921x_priv *priv, int port)
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{
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struct dsa_port *dp = dsa_to_port(&priv->ds, port);
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return dp->user ? READ_ONCE(dp->user->mtu) : ETH_DATA_LEN;
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}
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static int
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yt921x_dsa_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
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{
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@ -1097,6 +1118,266 @@ static int yt921x_dsa_port_max_mtu(struct dsa_switch *ds, int port)
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return YT921X_FRAME_SIZE_MAX - ETH_HLEN - ETH_FCS_LEN - YT921X_TAG_LEN;
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}
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/* v * 2^e */
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static u64 ldexpu64(u64 v, int e)
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{
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return e >= 0 ? v << e : v >> -e;
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}
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/* slot (ns) * rate (/s) / 10^9 (ns/s) = 2^C * token * 4^unit */
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static u32 rate2token(u64 rate, unsigned int slot_ns, int unit, int C)
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{
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int e = 2 * unit + C + YT921X_TOKEN_RATE_C;
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return div_u64(ldexpu64(slot_ns * rate, -e), 1000000000);
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}
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static u64 token2rate(u32 token, unsigned int slot_ns, int unit, int C)
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{
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int e = 2 * unit + C + YT921X_TOKEN_RATE_C;
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return div_u64(ldexpu64(mul_u32_u32(1000000000, token), e), slot_ns);
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}
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/* burst = 2^C * token * 4^unit */
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static u32 burst2token(u64 burst, int unit, int C)
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{
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return ldexpu64(burst, -(2 * unit + C));
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}
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static u64 token2burst(u32 token, int unit, int C)
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{
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return ldexpu64(token, 2 * unit + C);
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}
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struct yt921x_marker {
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u32 cir;
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u32 cbs;
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u32 ebs;
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int unit;
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bool pkt_mode;
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};
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#define YT921X_MARKER_PKT_MODE BIT(0)
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#define YT921X_MARKER_SINGLE_BUCKET BIT(1)
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static int
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yt921x_marker_tfm(struct yt921x_marker *marker, u64 rate, u64 burst,
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unsigned int flags, unsigned int slot_ns, u32 cir_max,
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u32 cbs_max, int unit_max, struct yt921x_priv *priv, int port,
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struct netlink_ext_ack *extack)
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{
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const int C = flags & YT921X_MARKER_PKT_MODE ? YT921X_TOKEN_PKT_C :
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YT921X_TOKEN_BYTE_C;
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struct device *dev = to_device(priv);
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struct yt921x_marker m;
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u64 burst_est;
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u64 burst_sug;
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u64 burst_max;
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u64 rate_max;
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m.unit = unit_max;
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rate_max = token2rate(cir_max, slot_ns, m.unit, C);
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burst_max = token2burst(cbs_max, m.unit, C);
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/* Check for unusual values */
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if (rate > rate_max || burst > burst_max) {
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NL_SET_ERR_MSG_MOD(extack, "Unexpected tremendous rate");
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return -ERANGE;
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}
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/* Check for matching burst */
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burst_est = div_u64(slot_ns * rate, 1000000000);
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burst_sug = burst_est;
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if (flags & YT921X_MARKER_PKT_MODE)
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burst_sug++;
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else
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burst_sug += ETH_HLEN + yt921x_mtu_fetch(priv, port) +
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ETH_FCS_LEN;
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if (burst_sug > burst)
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NL_SET_ERR_MSG_FMT_MOD(extack,
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"Consider match rate %llu with burst at least %llu",
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rate, burst_sug);
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/* Select unit */
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for (; m.unit > 0; m.unit--) {
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if (rate > (rate_max >> 2) || burst > (burst_max >> 2))
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break;
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rate_max >>= 2;
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burst_max >>= 2;
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}
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/* Calculate information rate and bucket size */
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m.cir = rate2token(rate, slot_ns, m.unit, C);
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if (!m.cir)
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m.cir = 1;
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else if (WARN_ON(m.cir > cir_max))
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m.cir = cir_max;
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m.cbs = burst2token(burst, m.unit, C);
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if (!m.cbs)
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m.cbs = 1;
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else if (WARN_ON(m.cbs > cbs_max))
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m.cbs = cbs_max;
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/* Cut EBS */
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m.ebs = 0;
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if (!(flags & YT921X_MARKER_SINGLE_BUCKET)) {
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/* We don't have a chance to adjust rate when MTU is changed */
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if (flags & YT921X_MARKER_PKT_MODE)
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burst_est++;
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else
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burst_est += YT921X_FRAME_SIZE_MAX;
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if (burst_est < burst) {
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u32 pbs = m.cbs;
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m.cbs = burst2token(burst_est, m.unit, C);
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if (!m.cbs)
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m.cbs = 1;
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else if (WARN_ON(m.cbs > cbs_max))
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m.cbs = cbs_max;
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if (pbs > m.cbs)
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m.ebs = pbs - m.cbs;
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}
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}
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dev_dbg(dev,
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"slot %u ns, rate %llu, burst %llu -> unit %d, cir %u, cbs %u, ebs %u\n",
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slot_ns, rate, burst, m.unit, m.cir, m.cbs, m.ebs);
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m.pkt_mode = flags & YT921X_MARKER_PKT_MODE;
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*marker = m;
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return 0;
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}
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static int
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yt921x_marker_tfm_police(struct yt921x_marker *marker,
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const struct flow_action_police *police,
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unsigned int flags, struct yt921x_priv *priv, int port,
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struct netlink_ext_ack *extack)
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{
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bool pkt_mode = !!police->rate_pkt_ps;
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u64 burst;
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u64 rate;
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rate = pkt_mode ? police->rate_pkt_ps : police->rate_bytes_ps;
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burst = pkt_mode ? police->burst_pkt : police->burst;
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if (pkt_mode)
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flags |= YT921X_MARKER_PKT_MODE;
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return yt921x_marker_tfm(marker, rate, burst, flags,
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priv->meter_slot_ns, YT921X_METER_CIR_MAX,
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YT921X_METER_CBS_MAX, YT921X_METER_UNIT_MAX,
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priv, port, extack);
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}
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static int
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yt921x_police_validate(const struct flow_action_police *police,
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const struct flow_action *action,
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const struct flow_action_entry *act,
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struct netlink_ext_ack *extack)
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{
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if (police->exceed.act_id != FLOW_ACTION_DROP) {
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NL_SET_ERR_MSG_MOD(extack,
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"Offload not supported when exceed action is not drop");
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return -EOPNOTSUPP;
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}
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if (police->notexceed.act_id != FLOW_ACTION_PIPE &&
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police->notexceed.act_id != FLOW_ACTION_ACCEPT) {
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NL_SET_ERR_MSG_MOD(extack,
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"Offload not supported when conform action is not pipe or ok");
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return -EOPNOTSUPP;
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}
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if (police->notexceed.act_id == FLOW_ACTION_ACCEPT && action && act &&
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!flow_action_is_last_entry(action, act)) {
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NL_SET_ERR_MSG_MOD(extack,
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"Offload not supported when conform action is ok, but action is not last");
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return -EOPNOTSUPP;
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}
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/* mtu defaults to unlimited but we got 2040 here, don't know why */
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if (police->peakrate_bytes_ps || police->avrate || police->overhead) {
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NL_SET_ERR_MSG_MOD(extack,
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"Offload not supported when peakrate/avrate/overhead is configured");
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return -EOPNOTSUPP;
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}
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return 0;
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}
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static int
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yt921x_meter_config(struct yt921x_priv *priv, unsigned int id,
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const struct yt921x_marker *marker)
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{
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u32 ctrls[3];
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ctrls[0] = 0;
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ctrls[1] = YT921X_METER_CTRLb_CIR(marker->cir);
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ctrls[2] = YT921X_METER_CTRLc_UNIT(marker->unit) |
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YT921X_METER_CTRLc_DROP_R |
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YT921X_METER_CTRLc_TOKEN_OVERFLOW_EN |
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YT921X_METER_CTRLc_METER_EN;
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if (marker->pkt_mode)
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ctrls[2] |= YT921X_METER_CTRLc_PKT_MODE;
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update_ctrls_unaligned(&ctrls[0], &ctrls[1],
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YT921X_METER_CTRLab_EBS_M,
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YT921X_METER_CTRLab_EBS(marker->ebs));
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update_ctrls_unaligned(&ctrls[1], &ctrls[2],
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YT921X_METER_CTRLbc_CBS_M,
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YT921X_METER_CTRLbc_CBS(marker->cbs));
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return yt921x_reg96_write(priv, YT921X_METERn_CTRL(id), ctrls);
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}
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static void yt921x_dsa_port_policer_del(struct dsa_switch *ds, int port)
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{
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struct yt921x_priv *priv = to_yt921x_priv(ds);
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struct device *dev = to_device(priv);
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int res;
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mutex_lock(&priv->reg_lock);
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res = yt921x_reg_write(priv, YT921X_PORTn_METER(port), 0);
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mutex_unlock(&priv->reg_lock);
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if (res)
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dev_err(dev, "Failed to %s port %d: %i\n", "delete policer on",
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port, res);
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}
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static int
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yt921x_dsa_port_policer_add(struct dsa_switch *ds, int port,
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const struct flow_action_police *police,
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struct netlink_ext_ack *extack)
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{
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struct yt921x_priv *priv = to_yt921x_priv(ds);
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struct yt921x_marker marker;
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u32 ctrl;
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int res;
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res = yt921x_police_validate(police, NULL, NULL, extack);
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if (res)
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return res;
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res = yt921x_marker_tfm_police(&marker, police, 0, priv, port, extack);
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if (res)
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return res;
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mutex_lock(&priv->reg_lock);
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res = yt921x_meter_config(priv, port + YT921X_METER_NUM, &marker);
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if (res)
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goto end;
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ctrl = YT921X_PORT_METER_ID(port) | YT921X_PORT_METER_EN;
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res = yt921x_reg_write(priv, YT921X_PORTn_METER(port), ctrl);
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end:
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mutex_unlock(&priv->reg_lock);
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return res;
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}
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static int
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yt921x_mirror_del(struct yt921x_priv *priv, int port, bool ingress)
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{
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@ -3051,6 +3332,7 @@ static int yt921x_chip_detect(struct yt921x_priv *priv)
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u32 chipid;
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u32 major;
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u32 mode;
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u32 val;
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int res;
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res = yt921x_reg_read(priv, YT921X_CHIP_ID, &chipid);
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@ -3085,12 +3367,27 @@ static int yt921x_chip_detect(struct yt921x_priv *priv)
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return -ENODEV;
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}
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res = yt921x_reg_read(priv, YT921X_SYS_CLK, &val);
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if (res)
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return res;
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switch (FIELD_GET(YT921X_SYS_CLK_SEL_M, val)) {
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case 0:
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priv->cycle_ns = info->major == YT9215_MAJOR ? 8 : 6;
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break;
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case YT921X_SYS_CLK_143M:
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priv->cycle_ns = 7;
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break;
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default:
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priv->cycle_ns = 8;
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}
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/* Print chipid here since we are interested in lower 16 bits */
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dev_info(dev,
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"Motorcomm %s ethernet switch, chipid: 0x%x, chipmode: 0x%x 0x%x\n",
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info->name, chipid, mode, extmode);
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priv->info = info;
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return 0;
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}
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@ -3212,6 +3509,23 @@ static int yt921x_chip_setup_dsa(struct yt921x_priv *priv)
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return 0;
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}
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static int yt921x_chip_setup_tc(struct yt921x_priv *priv)
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{
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unsigned int op_ns;
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u32 ctrl;
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int res;
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op_ns = 8 * priv->cycle_ns;
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ctrl = max(priv->meter_slot_ns / op_ns, YT921X_METER_SLOT_MIN);
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res = yt921x_reg_write(priv, YT921X_METER_SLOT, ctrl);
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if (res)
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return res;
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priv->meter_slot_ns = ctrl * op_ns;
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return 0;
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}
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static int __maybe_unused yt921x_chip_setup_qos(struct yt921x_priv *priv)
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{
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u32 ctrl;
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@ -3258,7 +3572,7 @@ static int yt921x_chip_setup(struct yt921x_priv *priv)
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u32 ctrl;
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int res;
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ctrl = YT921X_FUNC_MIB;
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ctrl = YT921X_FUNC_MIB | YT921X_FUNC_METER;
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res = yt921x_reg_set_bits(priv, YT921X_FUNC, ctrl);
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if (res)
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return res;
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@ -3267,6 +3581,10 @@ static int yt921x_chip_setup(struct yt921x_priv *priv)
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if (res)
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return res;
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res = yt921x_chip_setup_tc(priv);
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if (res)
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return res;
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#if IS_ENABLED(CONFIG_DCB)
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res = yt921x_chip_setup_qos(priv);
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if (res)
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@ -3358,6 +3676,9 @@ static const struct dsa_switch_ops yt921x_dsa_switch_ops = {
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/* mtu */
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.port_change_mtu = yt921x_dsa_port_change_mtu,
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.port_max_mtu = yt921x_dsa_port_max_mtu,
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/* rate */
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.port_policer_del = yt921x_dsa_port_policer_del,
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.port_policer_add = yt921x_dsa_port_policer_add,
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/* hsr */
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.port_hsr_leave = dsa_port_simple_hsr_leave,
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.port_hsr_join = dsa_port_simple_hsr_join,
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@ -23,6 +23,7 @@
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#define YT921X_RST_HW BIT(31)
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#define YT921X_RST_SW BIT(1)
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#define YT921X_FUNC 0x80004
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#define YT921X_FUNC_METER BIT(4)
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#define YT921X_FUNC_MIB BIT(1)
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#define YT921X_CHIP_ID 0x80008
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#define YT921X_CHIP_ID_MAJOR GENMASK(31, 16)
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@ -239,6 +240,11 @@
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#define YT921X_EDATA_DATA_STATUS_M GENMASK(3, 0)
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#define YT921X_EDATA_DATA_STATUS(x) FIELD_PREP(YT921X_EDATA_DATA_STATUS_M, (x))
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#define YT921X_EDATA_DATA_IDLE YT921X_EDATA_DATA_STATUS(3)
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#define YT921X_SYS_CLK 0xe0040
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#define YT921X_SYS_CLK_SEL_M GENMASK(1, 0) /* unknown: 167M */
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#define YT9215_SYS_CLK_125M 0
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#define YT9218_SYS_CLK_167M 0
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#define YT921X_SYS_CLK_143M 1
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#define YT921X_EXT_MBUS_OP 0x6a000
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#define YT921X_INT_MBUS_OP 0xf0000
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@ -465,6 +471,39 @@ enum yt921x_app_selector {
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#define YT921X_LAG_HASH_MAC_DA BIT(1)
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#define YT921X_LAG_HASH_SRC_PORT BIT(0)
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#define YT921X_PORTn_RATE(port) (0x220000 + 4 * (port))
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#define YT921X_PORT_RATE_GAP_VALUE GENMASK(4, 0) /* default 20 */
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#define YT921X_METER_SLOT 0x220104
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#define YT921X_METER_SLOT_SLOT_M GENMASK(11, 0)
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#define YT921X_PORTn_METER(port) (0x220108 + 4 * (port))
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#define YT921X_PORT_METER_EN BIT(4)
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#define YT921X_PORT_METER_ID_M GENMASK(3, 0)
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#define YT921X_PORT_METER_ID(x) FIELD_PREP(YT921X_PORT_METER_ID_M, (x))
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#define YT921X_METERn_CTRL(x) (0x220800 + 0x10 * (x))
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#define YT921X_METER_CTRLc_METER_EN BIT(14)
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#define YT921X_METER_CTRLc_TOKEN_OVERFLOW_EN BIT(13) /* RFC4115: yellow use unused green bw */
|
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#define YT921X_METER_CTRLc_DROP_M GENMASK(12, 11)
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#define YT921X_METER_CTRLc_DROP(x) FIELD_PREP(YT921X_METER_CTRLc_DROP_M, (x))
|
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#define YT921X_METER_CTRLc_DROP_GYR YT921X_METER_CTRLc_DROP(0)
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#define YT921X_METER_CTRLc_DROP_YR YT921X_METER_CTRLc_DROP(1)
|
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#define YT921X_METER_CTRLc_DROP_R YT921X_METER_CTRLc_DROP(2)
|
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#define YT921X_METER_CTRLc_DROP_NONE YT921X_METER_CTRLc_DROP(3)
|
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#define YT921X_METER_CTRLc_COLOR_BLIND BIT(10)
|
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#define YT921X_METER_CTRLc_UNIT_M GENMASK(9, 7)
|
||||
#define YT921X_METER_CTRLc_UNIT(x) FIELD_PREP(YT921X_METER_CTRLc_UNIT_M, (x))
|
||||
#define YT921X_METER_CTRLc_BYTE_MODE_INCLUDE_GAP BIT(6) /* +GAP_VALUE bytes each packet */
|
||||
#define YT921X_METER_CTRLc_PKT_MODE BIT(5) /* 0: byte rate mode */
|
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#define YT921X_METER_CTRLc_RFC2698 BIT(4) /* 0: RFC4115 */
|
||||
#define YT921X_METER_CTRLbc_CBS_M GENMASK_ULL(35, 20)
|
||||
#define YT921X_METER_CTRLbc_CBS(x) FIELD_PREP(YT921X_METER_CTRLbc_CBS_M, (x))
|
||||
#define YT921X_METER_CTRLb_CIR_M GENMASK(19, 2)
|
||||
#define YT921X_METER_CTRLb_CIR(x) FIELD_PREP(YT921X_METER_CTRLb_CIR_M, (x))
|
||||
#define YT921X_METER_CTRLab_EBS_M GENMASK_ULL(33, 18)
|
||||
#define YT921X_METER_CTRLab_EBS(x) FIELD_PREP(YT921X_METER_CTRLab_EBS_M, (x))
|
||||
#define YT921X_METER_CTRLa_EIR_M GENMASK(17, 0)
|
||||
#define YT921X_METER_CTRLa_EIR(x) FIELD_PREP(YT921X_METER_CTRLa_EIR_M, (x))
|
||||
#define YT921X_METERn_STAT(x) (0x221000 + 8 * (x))
|
||||
|
||||
#define YT921X_PORTn_VLAN_CTRL(port) (0x230010 + 4 * (port))
|
||||
#define YT921X_PORT_VLAN_CTRL_SVLAN_PRIO_EN BIT(31)
|
||||
#define YT921X_PORT_VLAN_CTRL_CVLAN_PRIO_EN BIT(30)
|
||||
|
|
@ -508,6 +547,16 @@ enum yt921x_fdb_entry_status {
|
|||
|
||||
#define YT921X_MSTI_NUM 16
|
||||
|
||||
#define YT921X_TOKEN_BYTE_C 1 /* 1 token = 2^1 byte */
|
||||
#define YT921X_TOKEN_PKT_C -6 /* 1 token = 2^-6 packets */
|
||||
#define YT921X_TOKEN_RATE_C -15
|
||||
/* Custom meters only, not including dedicated port meters (11) */
|
||||
#define YT921X_METER_NUM 64
|
||||
#define YT921X_METER_SLOT_MIN 80
|
||||
#define YT921X_METER_UNIT_MAX ((1 << 3) - 1)
|
||||
#define YT921X_METER_CIR_MAX ((1 << 18) - 1)
|
||||
#define YT921X_METER_CBS_MAX ((1 << 16) - 1)
|
||||
|
||||
#define YT921X_LAG_NUM 2
|
||||
#define YT921X_LAG_PORT_NUM 4
|
||||
|
||||
|
|
@ -602,8 +651,10 @@ struct yt921x_priv {
|
|||
struct dsa_switch ds;
|
||||
|
||||
const struct yt921x_info *info;
|
||||
unsigned int meter_slot_ns;
|
||||
/* cache of dsa_cpu_ports(ds) */
|
||||
u16 cpu_ports_mask;
|
||||
unsigned char cycle_ns;
|
||||
|
||||
/* protect the access to the switch registers */
|
||||
struct mutex reg_lock;
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user