1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2018, Sensor-Technik Wiedemann GmbH
3 * Copyright (c) 2018-2019, Vladimir Oltean <olteanv@gmail.com>
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8 #include <linux/delay.h>
9 #include <linux/module.h>
10 #include <linux/printk.h>
11 #include <linux/spi/spi.h>
12 #include <linux/errno.h>
13 #include <linux/gpio/consumer.h>
14 #include <linux/phylink.h>
16 #include <linux/of_net.h>
17 #include <linux/of_mdio.h>
18 #include <linux/of_device.h>
19 #include <linux/pcs/pcs-xpcs.h>
20 #include <linux/netdev_features.h>
21 #include <linux/netdevice.h>
22 #include <linux/if_bridge.h>
23 #include <linux/if_ether.h>
24 #include <linux/dsa/8021q.h>
26 #include "sja1105_tas.h"
28 #define SJA1105_UNKNOWN_MULTICAST 0x010000000000ull
30 static void sja1105_hw_reset(struct gpio_desc *gpio, unsigned int pulse_len,
31 unsigned int startup_delay)
33 gpiod_set_value_cansleep(gpio, 1);
34 /* Wait for minimum reset pulse length */
36 gpiod_set_value_cansleep(gpio, 0);
37 /* Wait until chip is ready after reset */
38 msleep(startup_delay);
42 sja1105_port_allow_traffic(struct sja1105_l2_forwarding_entry *l2_fwd,
43 int from, int to, bool allow)
46 l2_fwd[from].reach_port |= BIT(to);
48 l2_fwd[from].reach_port &= ~BIT(to);
51 static bool sja1105_can_forward(struct sja1105_l2_forwarding_entry *l2_fwd,
54 return !!(l2_fwd[from].reach_port & BIT(to));
57 static int sja1105_is_vlan_configured(struct sja1105_private *priv, u16 vid)
59 struct sja1105_vlan_lookup_entry *vlan;
62 vlan = priv->static_config.tables[BLK_IDX_VLAN_LOOKUP].entries;
63 count = priv->static_config.tables[BLK_IDX_VLAN_LOOKUP].entry_count;
65 for (i = 0; i < count; i++)
66 if (vlan[i].vlanid == vid)
69 /* Return an invalid entry index if not found */
73 static int sja1105_drop_untagged(struct dsa_switch *ds, int port, bool drop)
75 struct sja1105_private *priv = ds->priv;
76 struct sja1105_mac_config_entry *mac;
78 mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
80 if (mac[port].drpuntag == drop)
83 mac[port].drpuntag = drop;
85 return sja1105_dynamic_config_write(priv, BLK_IDX_MAC_CONFIG, port,
89 static int sja1105_pvid_apply(struct sja1105_private *priv, int port, u16 pvid)
91 struct sja1105_mac_config_entry *mac;
93 mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
95 if (mac[port].vlanid == pvid)
98 mac[port].vlanid = pvid;
100 return sja1105_dynamic_config_write(priv, BLK_IDX_MAC_CONFIG, port,
104 static int sja1105_commit_pvid(struct dsa_switch *ds, int port)
106 struct dsa_port *dp = dsa_to_port(ds, port);
107 struct sja1105_private *priv = ds->priv;
108 struct sja1105_vlan_lookup_entry *vlan;
109 bool drop_untagged = false;
113 if (dp->bridge_dev && br_vlan_enabled(dp->bridge_dev))
114 pvid = priv->bridge_pvid[port];
116 pvid = priv->tag_8021q_pvid[port];
118 rc = sja1105_pvid_apply(priv, port, pvid);
122 /* Only force dropping of untagged packets when the port is under a
123 * VLAN-aware bridge. When the tag_8021q pvid is used, we are
124 * deliberately removing the RX VLAN from the port's VMEMB_PORT list,
125 * to prevent DSA tag spoofing from the link partner. Untagged packets
126 * are the only ones that should be received with tag_8021q, so
127 * definitely don't drop them.
129 if (pvid == priv->bridge_pvid[port]) {
130 vlan = priv->static_config.tables[BLK_IDX_VLAN_LOOKUP].entries;
132 match = sja1105_is_vlan_configured(priv, pvid);
134 if (match < 0 || !(vlan[match].vmemb_port & BIT(port)))
135 drop_untagged = true;
138 if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))
139 drop_untagged = true;
141 return sja1105_drop_untagged(ds, port, drop_untagged);
144 static int sja1105_init_mac_settings(struct sja1105_private *priv)
146 struct sja1105_mac_config_entry default_mac = {
147 /* Enable all 8 priority queues on egress.
148 * Every queue i holds top[i] - base[i] frames.
149 * Sum of top[i] - base[i] is 511 (max hardware limit).
151 .top = {0x3F, 0x7F, 0xBF, 0xFF, 0x13F, 0x17F, 0x1BF, 0x1FF},
152 .base = {0x0, 0x40, 0x80, 0xC0, 0x100, 0x140, 0x180, 0x1C0},
153 .enabled = {true, true, true, true, true, true, true, true},
154 /* Keep standard IFG of 12 bytes on egress. */
156 /* Always put the MAC speed in automatic mode, where it can be
157 * adjusted at runtime by PHYLINK.
159 .speed = priv->info->port_speed[SJA1105_SPEED_AUTO],
160 /* No static correction for 1-step 1588 events */
163 /* Disable aging for critical TTEthernet traffic */
165 /* Internal VLAN (pvid) to apply to untagged ingress */
170 /* Don't drop traffic with other EtherType than ETH_P_IP */
172 /* Don't drop double-tagged traffic */
174 /* Don't drop untagged traffic */
176 /* Don't retag 802.1p (VID 0) traffic with the pvid */
178 /* Disable learning and I/O on user ports by default -
179 * STP will enable it.
185 struct sja1105_mac_config_entry *mac;
186 struct dsa_switch *ds = priv->ds;
187 struct sja1105_table *table;
190 table = &priv->static_config.tables[BLK_IDX_MAC_CONFIG];
192 /* Discard previous MAC Configuration Table */
193 if (table->entry_count) {
194 kfree(table->entries);
195 table->entry_count = 0;
198 table->entries = kcalloc(table->ops->max_entry_count,
199 table->ops->unpacked_entry_size, GFP_KERNEL);
203 table->entry_count = table->ops->max_entry_count;
205 mac = table->entries;
207 list_for_each_entry(dp, &ds->dst->ports, list) {
211 mac[dp->index] = default_mac;
213 /* Let sja1105_bridge_stp_state_set() keep address learning
214 * enabled for the DSA ports. CPU ports use software-assisted
215 * learning to ensure that only FDB entries belonging to the
216 * bridge are learned, and that they are learned towards all
217 * CPU ports in a cross-chip topology if multiple CPU ports
220 if (dsa_port_is_dsa(dp))
223 /* Disallow untagged packets from being received on the
226 if (dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp))
227 mac[dp->index].drpuntag = true;
233 static int sja1105_init_mii_settings(struct sja1105_private *priv)
235 struct device *dev = &priv->spidev->dev;
236 struct sja1105_xmii_params_entry *mii;
237 struct dsa_switch *ds = priv->ds;
238 struct sja1105_table *table;
241 table = &priv->static_config.tables[BLK_IDX_XMII_PARAMS];
243 /* Discard previous xMII Mode Parameters Table */
244 if (table->entry_count) {
245 kfree(table->entries);
246 table->entry_count = 0;
249 table->entries = kcalloc(table->ops->max_entry_count,
250 table->ops->unpacked_entry_size, GFP_KERNEL);
254 /* Override table based on PHYLINK DT bindings */
255 table->entry_count = table->ops->max_entry_count;
257 mii = table->entries;
259 for (i = 0; i < ds->num_ports; i++) {
260 sja1105_mii_role_t role = XMII_MAC;
262 if (dsa_is_unused_port(priv->ds, i))
265 switch (priv->phy_mode[i]) {
266 case PHY_INTERFACE_MODE_INTERNAL:
267 if (priv->info->internal_phy[i] == SJA1105_NO_PHY)
270 mii->xmii_mode[i] = XMII_MODE_MII;
271 if (priv->info->internal_phy[i] == SJA1105_PHY_BASE_TX)
272 mii->special[i] = true;
275 case PHY_INTERFACE_MODE_REVMII:
278 case PHY_INTERFACE_MODE_MII:
279 if (!priv->info->supports_mii[i])
282 mii->xmii_mode[i] = XMII_MODE_MII;
284 case PHY_INTERFACE_MODE_REVRMII:
287 case PHY_INTERFACE_MODE_RMII:
288 if (!priv->info->supports_rmii[i])
291 mii->xmii_mode[i] = XMII_MODE_RMII;
293 case PHY_INTERFACE_MODE_RGMII:
294 case PHY_INTERFACE_MODE_RGMII_ID:
295 case PHY_INTERFACE_MODE_RGMII_RXID:
296 case PHY_INTERFACE_MODE_RGMII_TXID:
297 if (!priv->info->supports_rgmii[i])
300 mii->xmii_mode[i] = XMII_MODE_RGMII;
302 case PHY_INTERFACE_MODE_SGMII:
303 if (!priv->info->supports_sgmii[i])
306 mii->xmii_mode[i] = XMII_MODE_SGMII;
307 mii->special[i] = true;
309 case PHY_INTERFACE_MODE_2500BASEX:
310 if (!priv->info->supports_2500basex[i])
313 mii->xmii_mode[i] = XMII_MODE_SGMII;
314 mii->special[i] = true;
318 dev_err(dev, "Unsupported PHY mode %s on port %d!\n",
319 phy_modes(priv->phy_mode[i]), i);
323 mii->phy_mac[i] = role;
328 static int sja1105_init_static_fdb(struct sja1105_private *priv)
330 struct sja1105_l2_lookup_entry *l2_lookup;
331 struct sja1105_table *table;
334 table = &priv->static_config.tables[BLK_IDX_L2_LOOKUP];
336 /* We only populate the FDB table through dynamic L2 Address Lookup
337 * entries, except for a special entry at the end which is a catch-all
338 * for unknown multicast and will be used to control flooding domain.
340 if (table->entry_count) {
341 kfree(table->entries);
342 table->entry_count = 0;
345 if (!priv->info->can_limit_mcast_flood)
348 table->entries = kcalloc(1, table->ops->unpacked_entry_size,
353 table->entry_count = 1;
354 l2_lookup = table->entries;
356 /* All L2 multicast addresses have an odd first octet */
357 l2_lookup[0].macaddr = SJA1105_UNKNOWN_MULTICAST;
358 l2_lookup[0].mask_macaddr = SJA1105_UNKNOWN_MULTICAST;
359 l2_lookup[0].lockeds = true;
360 l2_lookup[0].index = SJA1105_MAX_L2_LOOKUP_COUNT - 1;
362 /* Flood multicast to every port by default */
363 for (port = 0; port < priv->ds->num_ports; port++)
364 if (!dsa_is_unused_port(priv->ds, port))
365 l2_lookup[0].destports |= BIT(port);
370 static int sja1105_init_l2_lookup_params(struct sja1105_private *priv)
372 struct sja1105_l2_lookup_params_entry default_l2_lookup_params = {
373 /* Learned FDB entries are forgotten after 300 seconds */
374 .maxage = SJA1105_AGEING_TIME_MS(300000),
375 /* All entries within a FDB bin are available for learning */
376 .dyn_tbsz = SJA1105ET_FDB_BIN_SIZE,
377 /* And the P/Q/R/S equivalent setting: */
379 /* 2^8 + 2^5 + 2^3 + 2^2 + 2^1 + 1 in Koopman notation */
381 /* This selects between Independent VLAN Learning (IVL) and
382 * Shared VLAN Learning (SVL)
384 .shared_learn = true,
385 /* Don't discard management traffic based on ENFPORT -
386 * we don't perform SMAC port enforcement anyway, so
387 * what we are setting here doesn't matter.
389 .no_enf_hostprt = false,
390 /* Don't learn SMAC for mac_fltres1 and mac_fltres0.
391 * Maybe correlate with no_linklocal_learn from bridge driver?
393 .no_mgmt_learn = true,
396 /* Dynamically learned FDB entries can overwrite other (older)
397 * dynamic FDB entries
402 struct dsa_switch *ds = priv->ds;
403 int port, num_used_ports = 0;
404 struct sja1105_table *table;
407 for (port = 0; port < ds->num_ports; port++)
408 if (!dsa_is_unused_port(ds, port))
411 max_fdb_entries = SJA1105_MAX_L2_LOOKUP_COUNT / num_used_ports;
413 for (port = 0; port < ds->num_ports; port++) {
414 if (dsa_is_unused_port(ds, port))
417 default_l2_lookup_params.maxaddrp[port] = max_fdb_entries;
420 table = &priv->static_config.tables[BLK_IDX_L2_LOOKUP_PARAMS];
422 if (table->entry_count) {
423 kfree(table->entries);
424 table->entry_count = 0;
427 table->entries = kcalloc(table->ops->max_entry_count,
428 table->ops->unpacked_entry_size, GFP_KERNEL);
432 table->entry_count = table->ops->max_entry_count;
434 /* This table only has a single entry */
435 ((struct sja1105_l2_lookup_params_entry *)table->entries)[0] =
436 default_l2_lookup_params;
441 /* Set up a default VLAN for untagged traffic injected from the CPU
442 * using management routes (e.g. STP, PTP) as opposed to tag_8021q.
443 * All DT-defined ports are members of this VLAN, and there are no
444 * restrictions on forwarding (since the CPU selects the destination).
445 * Frames from this VLAN will always be transmitted as untagged, and
446 * neither the bridge nor the 8021q module cannot create this VLAN ID.
448 static int sja1105_init_static_vlan(struct sja1105_private *priv)
450 struct sja1105_table *table;
451 struct sja1105_vlan_lookup_entry pvid = {
452 .type_entry = SJA1110_VLAN_D_TAG,
458 .vlanid = SJA1105_DEFAULT_VLAN,
460 struct dsa_switch *ds = priv->ds;
463 table = &priv->static_config.tables[BLK_IDX_VLAN_LOOKUP];
465 if (table->entry_count) {
466 kfree(table->entries);
467 table->entry_count = 0;
470 table->entries = kzalloc(table->ops->unpacked_entry_size,
475 table->entry_count = 1;
477 for (port = 0; port < ds->num_ports; port++) {
478 if (dsa_is_unused_port(ds, port))
481 pvid.vmemb_port |= BIT(port);
482 pvid.vlan_bc |= BIT(port);
483 pvid.tag_port &= ~BIT(port);
485 if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)) {
486 priv->tag_8021q_pvid[port] = SJA1105_DEFAULT_VLAN;
487 priv->bridge_pvid[port] = SJA1105_DEFAULT_VLAN;
491 ((struct sja1105_vlan_lookup_entry *)table->entries)[0] = pvid;
495 static int sja1105_init_l2_forwarding(struct sja1105_private *priv)
497 struct sja1105_l2_forwarding_entry *l2fwd;
498 struct dsa_switch *ds = priv->ds;
499 struct dsa_switch_tree *dst;
500 struct sja1105_table *table;
505 table = &priv->static_config.tables[BLK_IDX_L2_FORWARDING];
507 if (table->entry_count) {
508 kfree(table->entries);
509 table->entry_count = 0;
512 table->entries = kcalloc(table->ops->max_entry_count,
513 table->ops->unpacked_entry_size, GFP_KERNEL);
517 table->entry_count = table->ops->max_entry_count;
519 l2fwd = table->entries;
521 /* First 5 entries in the L2 Forwarding Table define the forwarding
522 * rules and the VLAN PCP to ingress queue mapping.
523 * Set up the ingress queue mapping first.
525 for (port = 0; port < ds->num_ports; port++) {
526 if (dsa_is_unused_port(ds, port))
529 for (tc = 0; tc < SJA1105_NUM_TC; tc++)
530 l2fwd[port].vlan_pmap[tc] = tc;
533 /* Then manage the forwarding domain for user ports. These can forward
534 * only to the always-on domain (CPU port and DSA links)
536 for (from = 0; from < ds->num_ports; from++) {
537 if (!dsa_is_user_port(ds, from))
540 for (to = 0; to < ds->num_ports; to++) {
541 if (!dsa_is_cpu_port(ds, to) &&
542 !dsa_is_dsa_port(ds, to))
545 l2fwd[from].bc_domain |= BIT(to);
546 l2fwd[from].fl_domain |= BIT(to);
548 sja1105_port_allow_traffic(l2fwd, from, to, true);
552 /* Then manage the forwarding domain for DSA links and CPU ports (the
553 * always-on domain). These can send packets to any enabled port except
556 for (from = 0; from < ds->num_ports; from++) {
557 if (!dsa_is_cpu_port(ds, from) && !dsa_is_dsa_port(ds, from))
560 for (to = 0; to < ds->num_ports; to++) {
561 if (dsa_is_unused_port(ds, to))
567 l2fwd[from].bc_domain |= BIT(to);
568 l2fwd[from].fl_domain |= BIT(to);
570 sja1105_port_allow_traffic(l2fwd, from, to, true);
574 /* In odd topologies ("H" connections where there is a DSA link to
575 * another switch which also has its own CPU port), TX packets can loop
576 * back into the system (they are flooded from CPU port 1 to the DSA
577 * link, and from there to CPU port 2). Prevent this from happening by
578 * cutting RX from DSA links towards our CPU port, if the remote switch
579 * has its own CPU port and therefore doesn't need ours for network
584 list_for_each_entry(dl, &dst->rtable, list) {
585 if (dl->dp->ds != ds || dl->link_dp->cpu_dp == dl->dp->cpu_dp)
588 from = dl->dp->index;
589 to = dsa_upstream_port(ds, from);
592 "H topology detected, cutting RX from DSA link %d to CPU port %d to prevent TX packet loops\n",
595 sja1105_port_allow_traffic(l2fwd, from, to, false);
597 l2fwd[from].bc_domain &= ~BIT(to);
598 l2fwd[from].fl_domain &= ~BIT(to);
601 /* Finally, manage the egress flooding domain. All ports start up with
602 * flooding enabled, including the CPU port and DSA links.
604 for (port = 0; port < ds->num_ports; port++) {
605 if (dsa_is_unused_port(ds, port))
608 priv->ucast_egress_floods |= BIT(port);
609 priv->bcast_egress_floods |= BIT(port);
612 /* Next 8 entries define VLAN PCP mapping from ingress to egress.
613 * Create a one-to-one mapping.
615 for (tc = 0; tc < SJA1105_NUM_TC; tc++) {
616 for (port = 0; port < ds->num_ports; port++) {
617 if (dsa_is_unused_port(ds, port))
620 l2fwd[ds->num_ports + tc].vlan_pmap[port] = tc;
623 l2fwd[ds->num_ports + tc].type_egrpcp2outputq = true;
629 static int sja1110_init_pcp_remapping(struct sja1105_private *priv)
631 struct sja1110_pcp_remapping_entry *pcp_remap;
632 struct dsa_switch *ds = priv->ds;
633 struct sja1105_table *table;
636 table = &priv->static_config.tables[BLK_IDX_PCP_REMAPPING];
638 /* Nothing to do for SJA1105 */
639 if (!table->ops->max_entry_count)
642 if (table->entry_count) {
643 kfree(table->entries);
644 table->entry_count = 0;
647 table->entries = kcalloc(table->ops->max_entry_count,
648 table->ops->unpacked_entry_size, GFP_KERNEL);
652 table->entry_count = table->ops->max_entry_count;
654 pcp_remap = table->entries;
656 /* Repeat the configuration done for vlan_pmap */
657 for (port = 0; port < ds->num_ports; port++) {
658 if (dsa_is_unused_port(ds, port))
661 for (tc = 0; tc < SJA1105_NUM_TC; tc++)
662 pcp_remap[port].egrpcp[tc] = tc;
668 static int sja1105_init_l2_forwarding_params(struct sja1105_private *priv)
670 struct sja1105_l2_forwarding_params_entry *l2fwd_params;
671 struct sja1105_table *table;
673 table = &priv->static_config.tables[BLK_IDX_L2_FORWARDING_PARAMS];
675 if (table->entry_count) {
676 kfree(table->entries);
677 table->entry_count = 0;
680 table->entries = kcalloc(table->ops->max_entry_count,
681 table->ops->unpacked_entry_size, GFP_KERNEL);
685 table->entry_count = table->ops->max_entry_count;
687 /* This table only has a single entry */
688 l2fwd_params = table->entries;
690 /* Disallow dynamic reconfiguration of vlan_pmap */
691 l2fwd_params->max_dynp = 0;
692 /* Use a single memory partition for all ingress queues */
693 l2fwd_params->part_spc[0] = priv->info->max_frame_mem;
698 void sja1105_frame_memory_partitioning(struct sja1105_private *priv)
700 struct sja1105_l2_forwarding_params_entry *l2_fwd_params;
701 struct sja1105_vl_forwarding_params_entry *vl_fwd_params;
702 struct sja1105_table *table;
704 table = &priv->static_config.tables[BLK_IDX_L2_FORWARDING_PARAMS];
705 l2_fwd_params = table->entries;
706 l2_fwd_params->part_spc[0] = SJA1105_MAX_FRAME_MEMORY;
708 /* If we have any critical-traffic virtual links, we need to reserve
709 * some frame buffer memory for them. At the moment, hardcode the value
710 * at 100 blocks of 128 bytes of memory each. This leaves 829 blocks
711 * remaining for best-effort traffic. TODO: figure out a more flexible
712 * way to perform the frame buffer partitioning.
714 if (!priv->static_config.tables[BLK_IDX_VL_FORWARDING].entry_count)
717 table = &priv->static_config.tables[BLK_IDX_VL_FORWARDING_PARAMS];
718 vl_fwd_params = table->entries;
720 l2_fwd_params->part_spc[0] -= SJA1105_VL_FRAME_MEMORY;
721 vl_fwd_params->partspc[0] = SJA1105_VL_FRAME_MEMORY;
724 /* SJA1110 TDMACONFIGIDX values:
726 * | 100 Mbps ports | 1Gbps ports | 2.5Gbps ports | Disabled ports
727 * -----+----------------+---------------+---------------+---------------
728 * 0 | 0, [5:10] | [1:2] | [3:4] | retag
729 * 1 |0, [5:10], retag| [1:2] | [3:4] | -
730 * 2 | 0, [5:10] | [1:3], retag | 4 | -
731 * 3 | 0, [5:10] |[1:2], 4, retag| 3 | -
732 * 4 | 0, 2, [5:10] | 1, retag | [3:4] | -
733 * 5 | 0, 1, [5:10] | 2, retag | [3:4] | -
734 * 14 | 0, [5:10] | [1:4], retag | - | -
735 * 15 | [5:10] | [0:4], retag | - | -
737 static void sja1110_select_tdmaconfigidx(struct sja1105_private *priv)
739 struct sja1105_general_params_entry *general_params;
740 struct sja1105_table *table;
741 bool port_1_is_base_tx;
746 if (priv->info->device_id != SJA1110_DEVICE_ID)
749 table = &priv->static_config.tables[BLK_IDX_GENERAL_PARAMS];
750 general_params = table->entries;
752 /* All the settings below are "as opposed to SGMII", which is the
753 * other pinmuxing option.
755 port_1_is_base_tx = priv->phy_mode[1] == PHY_INTERFACE_MODE_INTERNAL;
756 port_3_is_2500 = priv->phy_mode[3] == PHY_INTERFACE_MODE_2500BASEX;
757 port_4_is_2500 = priv->phy_mode[4] == PHY_INTERFACE_MODE_2500BASEX;
759 if (port_1_is_base_tx)
760 /* Retagging port will operate at 1 Gbps */
762 else if (port_3_is_2500 && port_4_is_2500)
763 /* Retagging port will operate at 100 Mbps */
765 else if (port_3_is_2500)
766 /* Retagging port will operate at 1 Gbps */
768 else if (port_4_is_2500)
769 /* Retagging port will operate at 1 Gbps */
772 /* Retagging port will operate at 1 Gbps */
775 general_params->tdmaconfigidx = tdmaconfigidx;
778 static int sja1105_init_topology(struct sja1105_private *priv,
779 struct sja1105_general_params_entry *general_params)
781 struct dsa_switch *ds = priv->ds;
784 /* The host port is the destination for traffic matching mac_fltres1
785 * and mac_fltres0 on all ports except itself. Default to an invalid
788 general_params->host_port = ds->num_ports;
790 /* Link-local traffic received on casc_port will be forwarded
791 * to host_port without embedding the source port and device ID
792 * info in the destination MAC address, and no RX timestamps will be
793 * taken either (presumably because it is a cascaded port and a
794 * downstream SJA switch already did that).
795 * To disable the feature, we need to do different things depending on
796 * switch generation. On SJA1105 we need to set an invalid port, while
797 * on SJA1110 which support multiple cascaded ports, this field is a
798 * bitmask so it must be left zero.
800 if (!priv->info->multiple_cascade_ports)
801 general_params->casc_port = ds->num_ports;
803 for (port = 0; port < ds->num_ports; port++) {
804 bool is_upstream = dsa_is_upstream_port(ds, port);
805 bool is_dsa_link = dsa_is_dsa_port(ds, port);
807 /* Upstream ports can be dedicated CPU ports or
808 * upstream-facing DSA links
811 if (general_params->host_port == ds->num_ports) {
812 general_params->host_port = port;
815 "Port %llu is already a host port, configuring %d as one too is not supported\n",
816 general_params->host_port, port);
821 /* Cascade ports are downstream-facing DSA links */
822 if (is_dsa_link && !is_upstream) {
823 if (priv->info->multiple_cascade_ports) {
824 general_params->casc_port |= BIT(port);
825 } else if (general_params->casc_port == ds->num_ports) {
826 general_params->casc_port = port;
829 "Port %llu is already a cascade port, configuring %d as one too is not supported\n",
830 general_params->casc_port, port);
836 if (general_params->host_port == ds->num_ports) {
837 dev_err(ds->dev, "No host port configured\n");
844 static int sja1105_init_general_params(struct sja1105_private *priv)
846 struct sja1105_general_params_entry default_general_params = {
847 /* Allow dynamic changing of the mirror port */
849 .switchid = priv->ds->index,
850 /* Priority queue for link-local management frames
851 * (both ingress to and egress from CPU - PTP, STP etc)
854 .mac_fltres1 = SJA1105_LINKLOCAL_FILTER_A,
855 .mac_flt1 = SJA1105_LINKLOCAL_FILTER_A_MASK,
856 .incl_srcpt1 = false,
858 .mac_fltres0 = SJA1105_LINKLOCAL_FILTER_B,
859 .mac_flt0 = SJA1105_LINKLOCAL_FILTER_B_MASK,
860 .incl_srcpt0 = false,
862 /* Default to an invalid value */
863 .mirr_port = priv->ds->num_ports,
865 .vllupformat = SJA1105_VL_FORMAT_PSFP,
868 /* Only update correctionField for 1-step PTP (L2 transport) */
870 /* Forcefully disable VLAN filtering by telling
871 * the switch that VLAN has a different EtherType.
873 .tpid = ETH_P_SJA1105,
874 .tpid2 = ETH_P_SJA1105,
875 /* Enable the TTEthernet engine on SJA1110 */
877 /* Set up the EtherType for control packets on SJA1110 */
878 .header_type = ETH_P_SJA1110,
880 struct sja1105_general_params_entry *general_params;
881 struct sja1105_table *table;
884 rc = sja1105_init_topology(priv, &default_general_params);
888 table = &priv->static_config.tables[BLK_IDX_GENERAL_PARAMS];
890 if (table->entry_count) {
891 kfree(table->entries);
892 table->entry_count = 0;
895 table->entries = kcalloc(table->ops->max_entry_count,
896 table->ops->unpacked_entry_size, GFP_KERNEL);
900 table->entry_count = table->ops->max_entry_count;
902 general_params = table->entries;
904 /* This table only has a single entry */
905 general_params[0] = default_general_params;
907 sja1110_select_tdmaconfigidx(priv);
912 static int sja1105_init_avb_params(struct sja1105_private *priv)
914 struct sja1105_avb_params_entry *avb;
915 struct sja1105_table *table;
917 table = &priv->static_config.tables[BLK_IDX_AVB_PARAMS];
919 /* Discard previous AVB Parameters Table */
920 if (table->entry_count) {
921 kfree(table->entries);
922 table->entry_count = 0;
925 table->entries = kcalloc(table->ops->max_entry_count,
926 table->ops->unpacked_entry_size, GFP_KERNEL);
930 table->entry_count = table->ops->max_entry_count;
932 avb = table->entries;
934 /* Configure the MAC addresses for meta frames */
935 avb->destmeta = SJA1105_META_DMAC;
936 avb->srcmeta = SJA1105_META_SMAC;
937 /* On P/Q/R/S, configure the direction of the PTP_CLK pin as input by
938 * default. This is because there might be boards with a hardware
939 * layout where enabling the pin as output might cause an electrical
940 * clash. On E/T the pin is always an output, which the board designers
941 * probably already knew, so even if there are going to be electrical
942 * issues, there's nothing we can do.
944 avb->cas_master = false;
949 /* The L2 policing table is 2-stage. The table is looked up for each frame
950 * according to the ingress port, whether it was broadcast or not, and the
951 * classified traffic class (given by VLAN PCP). This portion of the lookup is
952 * fixed, and gives access to the SHARINDX, an indirection register pointing
953 * within the policing table itself, which is used to resolve the policer that
954 * will be used for this frame.
957 * +------------+--------+ +---------------------------------+
958 * |Port 0 TC 0 |SHARINDX| | Policer 0: Rate, Burst, MTU |
959 * +------------+--------+ +---------------------------------+
960 * |Port 0 TC 1 |SHARINDX| | Policer 1: Rate, Burst, MTU |
961 * +------------+--------+ +---------------------------------+
962 * ... | Policer 2: Rate, Burst, MTU |
963 * +------------+--------+ +---------------------------------+
964 * |Port 0 TC 7 |SHARINDX| | Policer 3: Rate, Burst, MTU |
965 * +------------+--------+ +---------------------------------+
966 * |Port 1 TC 0 |SHARINDX| | Policer 4: Rate, Burst, MTU |
967 * +------------+--------+ +---------------------------------+
968 * ... | Policer 5: Rate, Burst, MTU |
969 * +------------+--------+ +---------------------------------+
970 * |Port 1 TC 7 |SHARINDX| | Policer 6: Rate, Burst, MTU |
971 * +------------+--------+ +---------------------------------+
972 * ... | Policer 7: Rate, Burst, MTU |
973 * +------------+--------+ +---------------------------------+
974 * |Port 4 TC 7 |SHARINDX| ...
975 * +------------+--------+
976 * |Port 0 BCAST|SHARINDX| ...
977 * +------------+--------+
978 * |Port 1 BCAST|SHARINDX| ...
979 * +------------+--------+
981 * +------------+--------+ +---------------------------------+
982 * |Port 4 BCAST|SHARINDX| | Policer 44: Rate, Burst, MTU |
983 * +------------+--------+ +---------------------------------+
985 * In this driver, we shall use policers 0-4 as statically alocated port
986 * (matchall) policers. So we need to make the SHARINDX for all lookups
987 * corresponding to this ingress port (8 VLAN PCP lookups and 1 broadcast
989 * The remaining policers (40) shall be dynamically allocated for flower
990 * policers, where the key is either vlan_prio or dst_mac ff:ff:ff:ff:ff:ff.
992 #define SJA1105_RATE_MBPS(speed) (((speed) * 64000) / 1000)
994 static int sja1105_init_l2_policing(struct sja1105_private *priv)
996 struct sja1105_l2_policing_entry *policing;
997 struct dsa_switch *ds = priv->ds;
998 struct sja1105_table *table;
1001 table = &priv->static_config.tables[BLK_IDX_L2_POLICING];
1003 /* Discard previous L2 Policing Table */
1004 if (table->entry_count) {
1005 kfree(table->entries);
1006 table->entry_count = 0;
1009 table->entries = kcalloc(table->ops->max_entry_count,
1010 table->ops->unpacked_entry_size, GFP_KERNEL);
1011 if (!table->entries)
1014 table->entry_count = table->ops->max_entry_count;
1016 policing = table->entries;
1018 /* Setup shared indices for the matchall policers */
1019 for (port = 0; port < ds->num_ports; port++) {
1020 int mcast = (ds->num_ports * (SJA1105_NUM_TC + 1)) + port;
1021 int bcast = (ds->num_ports * SJA1105_NUM_TC) + port;
1023 for (tc = 0; tc < SJA1105_NUM_TC; tc++)
1024 policing[port * SJA1105_NUM_TC + tc].sharindx = port;
1026 policing[bcast].sharindx = port;
1027 /* Only SJA1110 has multicast policers */
1028 if (mcast <= table->ops->max_entry_count)
1029 policing[mcast].sharindx = port;
1032 /* Setup the matchall policer parameters */
1033 for (port = 0; port < ds->num_ports; port++) {
1034 int mtu = VLAN_ETH_FRAME_LEN + ETH_FCS_LEN;
1036 if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))
1039 policing[port].smax = 65535; /* Burst size in bytes */
1040 policing[port].rate = SJA1105_RATE_MBPS(1000);
1041 policing[port].maxlen = mtu;
1042 policing[port].partition = 0;
1048 static int sja1105_static_config_load(struct sja1105_private *priv)
1052 sja1105_static_config_free(&priv->static_config);
1053 rc = sja1105_static_config_init(&priv->static_config,
1054 priv->info->static_ops,
1055 priv->info->device_id);
1059 /* Build static configuration */
1060 rc = sja1105_init_mac_settings(priv);
1063 rc = sja1105_init_mii_settings(priv);
1066 rc = sja1105_init_static_fdb(priv);
1069 rc = sja1105_init_static_vlan(priv);
1072 rc = sja1105_init_l2_lookup_params(priv);
1075 rc = sja1105_init_l2_forwarding(priv);
1078 rc = sja1105_init_l2_forwarding_params(priv);
1081 rc = sja1105_init_l2_policing(priv);
1084 rc = sja1105_init_general_params(priv);
1087 rc = sja1105_init_avb_params(priv);
1090 rc = sja1110_init_pcp_remapping(priv);
1094 /* Send initial configuration to hardware via SPI */
1095 return sja1105_static_config_upload(priv);
1098 static int sja1105_parse_rgmii_delays(struct sja1105_private *priv)
1100 struct dsa_switch *ds = priv->ds;
1103 for (port = 0; port < ds->num_ports; port++) {
1104 if (!priv->fixed_link[port])
1107 if (priv->phy_mode[port] == PHY_INTERFACE_MODE_RGMII_RXID ||
1108 priv->phy_mode[port] == PHY_INTERFACE_MODE_RGMII_ID)
1109 priv->rgmii_rx_delay[port] = true;
1111 if (priv->phy_mode[port] == PHY_INTERFACE_MODE_RGMII_TXID ||
1112 priv->phy_mode[port] == PHY_INTERFACE_MODE_RGMII_ID)
1113 priv->rgmii_tx_delay[port] = true;
1115 if ((priv->rgmii_rx_delay[port] || priv->rgmii_tx_delay[port]) &&
1116 !priv->info->setup_rgmii_delay)
1122 static int sja1105_parse_ports_node(struct sja1105_private *priv,
1123 struct device_node *ports_node)
1125 struct device *dev = &priv->spidev->dev;
1126 struct device_node *child;
1128 for_each_available_child_of_node(ports_node, child) {
1129 struct device_node *phy_node;
1130 phy_interface_t phy_mode;
1134 /* Get switch port number from DT */
1135 if (of_property_read_u32(child, "reg", &index) < 0) {
1136 dev_err(dev, "Port number not defined in device tree "
1137 "(property \"reg\")\n");
1142 /* Get PHY mode from DT */
1143 err = of_get_phy_mode(child, &phy_mode);
1145 dev_err(dev, "Failed to read phy-mode or "
1146 "phy-interface-type property for port %d\n",
1152 phy_node = of_parse_phandle(child, "phy-handle", 0);
1154 if (!of_phy_is_fixed_link(child)) {
1155 dev_err(dev, "phy-handle or fixed-link "
1156 "properties missing!\n");
1160 /* phy-handle is missing, but fixed-link isn't.
1161 * So it's a fixed link. Default to PHY role.
1163 priv->fixed_link[index] = true;
1165 of_node_put(phy_node);
1168 priv->phy_mode[index] = phy_mode;
1174 static int sja1105_parse_dt(struct sja1105_private *priv)
1176 struct device *dev = &priv->spidev->dev;
1177 struct device_node *switch_node = dev->of_node;
1178 struct device_node *ports_node;
1181 ports_node = of_get_child_by_name(switch_node, "ports");
1183 ports_node = of_get_child_by_name(switch_node, "ethernet-ports");
1185 dev_err(dev, "Incorrect bindings: absent \"ports\" node\n");
1189 rc = sja1105_parse_ports_node(priv, ports_node);
1190 of_node_put(ports_node);
1195 /* Convert link speed from SJA1105 to ethtool encoding */
1196 static int sja1105_port_speed_to_ethtool(struct sja1105_private *priv,
1199 if (speed == priv->info->port_speed[SJA1105_SPEED_10MBPS])
1201 if (speed == priv->info->port_speed[SJA1105_SPEED_100MBPS])
1203 if (speed == priv->info->port_speed[SJA1105_SPEED_1000MBPS])
1205 if (speed == priv->info->port_speed[SJA1105_SPEED_2500MBPS])
1207 return SPEED_UNKNOWN;
1210 /* Set link speed in the MAC configuration for a specific port. */
1211 static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
1214 struct sja1105_mac_config_entry *mac;
1215 struct device *dev = priv->ds->dev;
1219 /* On P/Q/R/S, one can read from the device via the MAC reconfiguration
1220 * tables. On E/T, MAC reconfig tables are not readable, only writable.
1221 * We have to *know* what the MAC looks like. For the sake of keeping
1222 * the code common, we'll use the static configuration tables as a
1223 * reasonable approximation for both E/T and P/Q/R/S.
1225 mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
1227 switch (speed_mbps) {
1229 /* PHYLINK called sja1105_mac_config() to inform us about
1230 * the state->interface, but AN has not completed and the
1231 * speed is not yet valid. UM10944.pdf says that setting
1232 * SJA1105_SPEED_AUTO at runtime disables the port, so that is
1233 * ok for power consumption in case AN will never complete -
1234 * otherwise PHYLINK should come back with a new update.
1236 speed = priv->info->port_speed[SJA1105_SPEED_AUTO];
1239 speed = priv->info->port_speed[SJA1105_SPEED_10MBPS];
1242 speed = priv->info->port_speed[SJA1105_SPEED_100MBPS];
1245 speed = priv->info->port_speed[SJA1105_SPEED_1000MBPS];
1248 speed = priv->info->port_speed[SJA1105_SPEED_2500MBPS];
1251 dev_err(dev, "Invalid speed %iMbps\n", speed_mbps);
1255 /* Overwrite SJA1105_SPEED_AUTO from the static MAC configuration
1256 * table, since this will be used for the clocking setup, and we no
1257 * longer need to store it in the static config (already told hardware
1258 * we want auto during upload phase).
1259 * Actually for the SGMII port, the MAC is fixed at 1 Gbps and
1260 * we need to configure the PCS only (if even that).
1262 if (priv->phy_mode[port] == PHY_INTERFACE_MODE_SGMII)
1263 mac[port].speed = priv->info->port_speed[SJA1105_SPEED_1000MBPS];
1264 else if (priv->phy_mode[port] == PHY_INTERFACE_MODE_2500BASEX)
1265 mac[port].speed = priv->info->port_speed[SJA1105_SPEED_2500MBPS];
1267 mac[port].speed = speed;
1269 /* Write to the dynamic reconfiguration tables */
1270 rc = sja1105_dynamic_config_write(priv, BLK_IDX_MAC_CONFIG, port,
1273 dev_err(dev, "Failed to write MAC config: %d\n", rc);
1277 /* Reconfigure the PLLs for the RGMII interfaces (required 125 MHz at
1278 * gigabit, 25 MHz at 100 Mbps and 2.5 MHz at 10 Mbps). For MII and
1279 * RMII no change of the clock setup is required. Actually, changing
1280 * the clock setup does interrupt the clock signal for a certain time
1281 * which causes trouble for all PHYs relying on this signal.
1283 if (!phy_interface_mode_is_rgmii(priv->phy_mode[port]))
1286 return sja1105_clocking_setup_port(priv, port);
1289 /* The SJA1105 MAC programming model is through the static config (the xMII
1290 * Mode table cannot be dynamically reconfigured), and we have to program
1291 * that early (earlier than PHYLINK calls us, anyway).
1292 * So just error out in case the connected PHY attempts to change the initial
1293 * system interface MII protocol from what is defined in the DT, at least for
1296 static bool sja1105_phy_mode_mismatch(struct sja1105_private *priv, int port,
1297 phy_interface_t interface)
1299 return priv->phy_mode[port] != interface;
1302 static void sja1105_mac_config(struct dsa_switch *ds, int port,
1304 const struct phylink_link_state *state)
1306 struct dsa_port *dp = dsa_to_port(ds, port);
1307 struct sja1105_private *priv = ds->priv;
1308 struct dw_xpcs *xpcs;
1310 if (sja1105_phy_mode_mismatch(priv, port, state->interface)) {
1311 dev_err(ds->dev, "Changing PHY mode to %s not supported!\n",
1312 phy_modes(state->interface));
1316 xpcs = priv->xpcs[port];
1319 phylink_set_pcs(dp->pl, &xpcs->pcs);
1322 static void sja1105_mac_link_down(struct dsa_switch *ds, int port,
1324 phy_interface_t interface)
1326 sja1105_inhibit_tx(ds->priv, BIT(port), true);
1329 static void sja1105_mac_link_up(struct dsa_switch *ds, int port,
1331 phy_interface_t interface,
1332 struct phy_device *phydev,
1333 int speed, int duplex,
1334 bool tx_pause, bool rx_pause)
1336 struct sja1105_private *priv = ds->priv;
1338 sja1105_adjust_port_config(priv, port, speed);
1340 sja1105_inhibit_tx(priv, BIT(port), false);
1343 static void sja1105_phylink_validate(struct dsa_switch *ds, int port,
1344 unsigned long *supported,
1345 struct phylink_link_state *state)
1347 /* Construct a new mask which exhaustively contains all link features
1348 * supported by the MAC, and then apply that (logical AND) to what will
1349 * be sent to the PHY for "marketing".
1351 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
1352 struct sja1105_private *priv = ds->priv;
1353 struct sja1105_xmii_params_entry *mii;
1355 mii = priv->static_config.tables[BLK_IDX_XMII_PARAMS].entries;
1357 /* include/linux/phylink.h says:
1358 * When @state->interface is %PHY_INTERFACE_MODE_NA, phylink
1359 * expects the MAC driver to return all supported link modes.
1361 if (state->interface != PHY_INTERFACE_MODE_NA &&
1362 sja1105_phy_mode_mismatch(priv, port, state->interface)) {
1363 bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
1367 /* The MAC does not support pause frames, and also doesn't
1368 * support half-duplex traffic modes.
1370 phylink_set(mask, Autoneg);
1371 phylink_set(mask, MII);
1372 phylink_set(mask, 10baseT_Full);
1373 phylink_set(mask, 100baseT_Full);
1374 phylink_set(mask, 100baseT1_Full);
1375 if (mii->xmii_mode[port] == XMII_MODE_RGMII ||
1376 mii->xmii_mode[port] == XMII_MODE_SGMII)
1377 phylink_set(mask, 1000baseT_Full);
1378 if (priv->info->supports_2500basex[port]) {
1379 phylink_set(mask, 2500baseT_Full);
1380 phylink_set(mask, 2500baseX_Full);
1383 bitmap_and(supported, supported, mask, __ETHTOOL_LINK_MODE_MASK_NBITS);
1384 bitmap_and(state->advertising, state->advertising, mask,
1385 __ETHTOOL_LINK_MODE_MASK_NBITS);
1389 sja1105_find_static_fdb_entry(struct sja1105_private *priv, int port,
1390 const struct sja1105_l2_lookup_entry *requested)
1392 struct sja1105_l2_lookup_entry *l2_lookup;
1393 struct sja1105_table *table;
1396 table = &priv->static_config.tables[BLK_IDX_L2_LOOKUP];
1397 l2_lookup = table->entries;
1399 for (i = 0; i < table->entry_count; i++)
1400 if (l2_lookup[i].macaddr == requested->macaddr &&
1401 l2_lookup[i].vlanid == requested->vlanid &&
1402 l2_lookup[i].destports & BIT(port))
1408 /* We want FDB entries added statically through the bridge command to persist
1409 * across switch resets, which are a common thing during normal SJA1105
1410 * operation. So we have to back them up in the static configuration tables
1411 * and hence apply them on next static config upload... yay!
1414 sja1105_static_fdb_change(struct sja1105_private *priv, int port,
1415 const struct sja1105_l2_lookup_entry *requested,
1418 struct sja1105_l2_lookup_entry *l2_lookup;
1419 struct sja1105_table *table;
1422 table = &priv->static_config.tables[BLK_IDX_L2_LOOKUP];
1424 match = sja1105_find_static_fdb_entry(priv, port, requested);
1426 /* Can't delete a missing entry. */
1430 /* No match => new entry */
1431 rc = sja1105_table_resize(table, table->entry_count + 1);
1435 match = table->entry_count - 1;
1438 /* Assign pointer after the resize (it may be new memory) */
1439 l2_lookup = table->entries;
1442 * If the job was to add this FDB entry, it's already done (mostly
1443 * anyway, since the port forwarding mask may have changed, case in
1444 * which we update it).
1445 * Otherwise we have to delete it.
1448 l2_lookup[match] = *requested;
1452 /* To remove, the strategy is to overwrite the element with
1453 * the last one, and then reduce the array size by 1
1455 l2_lookup[match] = l2_lookup[table->entry_count - 1];
1456 return sja1105_table_resize(table, table->entry_count - 1);
1459 /* First-generation switches have a 4-way set associative TCAM that
1460 * holds the FDB entries. An FDB index spans from 0 to 1023 and is comprised of
1461 * a "bin" (grouping of 4 entries) and a "way" (an entry within a bin).
1462 * For the placement of a newly learnt FDB entry, the switch selects the bin
1463 * based on a hash function, and the way within that bin incrementally.
1465 static int sja1105et_fdb_index(int bin, int way)
1467 return bin * SJA1105ET_FDB_BIN_SIZE + way;
1470 static int sja1105et_is_fdb_entry_in_bin(struct sja1105_private *priv, int bin,
1471 const u8 *addr, u16 vid,
1472 struct sja1105_l2_lookup_entry *match,
1477 for (way = 0; way < SJA1105ET_FDB_BIN_SIZE; way++) {
1478 struct sja1105_l2_lookup_entry l2_lookup = {0};
1479 int index = sja1105et_fdb_index(bin, way);
1481 /* Skip unused entries, optionally marking them
1482 * into the return value
1484 if (sja1105_dynamic_config_read(priv, BLK_IDX_L2_LOOKUP,
1485 index, &l2_lookup)) {
1491 if (l2_lookup.macaddr == ether_addr_to_u64(addr) &&
1492 l2_lookup.vlanid == vid) {
1498 /* Return an invalid entry index if not found */
1502 int sja1105et_fdb_add(struct dsa_switch *ds, int port,
1503 const unsigned char *addr, u16 vid)
1505 struct sja1105_l2_lookup_entry l2_lookup = {0}, tmp;
1506 struct sja1105_private *priv = ds->priv;
1507 struct device *dev = ds->dev;
1508 int last_unused = -1;
1512 bin = sja1105et_fdb_hash(priv, addr, vid);
1514 way = sja1105et_is_fdb_entry_in_bin(priv, bin, addr, vid,
1515 &l2_lookup, &last_unused);
1517 /* We have an FDB entry. Is our port in the destination
1518 * mask? If yes, we need to do nothing. If not, we need
1519 * to rewrite the entry by adding this port to it.
1521 if ((l2_lookup.destports & BIT(port)) && l2_lookup.lockeds)
1523 l2_lookup.destports |= BIT(port);
1525 int index = sja1105et_fdb_index(bin, way);
1527 /* We don't have an FDB entry. We construct a new one and
1528 * try to find a place for it within the FDB table.
1530 l2_lookup.macaddr = ether_addr_to_u64(addr);
1531 l2_lookup.destports = BIT(port);
1532 l2_lookup.vlanid = vid;
1534 if (last_unused >= 0) {
1537 /* Bin is full, need to evict somebody.
1538 * Choose victim at random. If you get these messages
1539 * often, you may need to consider changing the
1540 * distribution function:
1541 * static_config[BLK_IDX_L2_LOOKUP_PARAMS].entries->poly
1543 get_random_bytes(&way, sizeof(u8));
1544 way %= SJA1105ET_FDB_BIN_SIZE;
1545 dev_warn(dev, "Warning, FDB bin %d full while adding entry for %pM. Evicting entry %u.\n",
1548 sja1105_dynamic_config_write(priv, BLK_IDX_L2_LOOKUP,
1549 index, NULL, false);
1552 l2_lookup.lockeds = true;
1553 l2_lookup.index = sja1105et_fdb_index(bin, way);
1555 rc = sja1105_dynamic_config_write(priv, BLK_IDX_L2_LOOKUP,
1556 l2_lookup.index, &l2_lookup,
1561 /* Invalidate a dynamically learned entry if that exists */
1562 start = sja1105et_fdb_index(bin, 0);
1563 end = sja1105et_fdb_index(bin, way);
1565 for (i = start; i < end; i++) {
1566 rc = sja1105_dynamic_config_read(priv, BLK_IDX_L2_LOOKUP,
1573 if (tmp.macaddr != ether_addr_to_u64(addr) || tmp.vlanid != vid)
1576 rc = sja1105_dynamic_config_write(priv, BLK_IDX_L2_LOOKUP,
1584 return sja1105_static_fdb_change(priv, port, &l2_lookup, true);
1587 int sja1105et_fdb_del(struct dsa_switch *ds, int port,
1588 const unsigned char *addr, u16 vid)
1590 struct sja1105_l2_lookup_entry l2_lookup = {0};
1591 struct sja1105_private *priv = ds->priv;
1592 int index, bin, way, rc;
1595 bin = sja1105et_fdb_hash(priv, addr, vid);
1596 way = sja1105et_is_fdb_entry_in_bin(priv, bin, addr, vid,
1600 index = sja1105et_fdb_index(bin, way);
1602 /* We have an FDB entry. Is our port in the destination mask? If yes,
1603 * we need to remove it. If the resulting port mask becomes empty, we
1604 * need to completely evict the FDB entry.
1605 * Otherwise we just write it back.
1607 l2_lookup.destports &= ~BIT(port);
1609 if (l2_lookup.destports)
1614 rc = sja1105_dynamic_config_write(priv, BLK_IDX_L2_LOOKUP,
1615 index, &l2_lookup, keep);
1619 return sja1105_static_fdb_change(priv, port, &l2_lookup, keep);
1622 int sja1105pqrs_fdb_add(struct dsa_switch *ds, int port,
1623 const unsigned char *addr, u16 vid)
1625 struct sja1105_l2_lookup_entry l2_lookup = {0}, tmp;
1626 struct sja1105_private *priv = ds->priv;
1629 /* Search for an existing entry in the FDB table */
1630 l2_lookup.macaddr = ether_addr_to_u64(addr);
1631 l2_lookup.vlanid = vid;
1632 l2_lookup.mask_macaddr = GENMASK_ULL(ETH_ALEN * 8 - 1, 0);
1633 l2_lookup.mask_vlanid = VLAN_VID_MASK;
1634 l2_lookup.destports = BIT(port);
1638 rc = sja1105_dynamic_config_read(priv, BLK_IDX_L2_LOOKUP,
1639 SJA1105_SEARCH, &tmp);
1640 if (rc == 0 && tmp.index != SJA1105_MAX_L2_LOOKUP_COUNT - 1) {
1641 /* Found a static entry and this port is already in the entry's
1642 * port mask => job done
1644 if ((tmp.destports & BIT(port)) && tmp.lockeds)
1649 /* l2_lookup.index is populated by the switch in case it
1652 l2_lookup.destports |= BIT(port);
1653 goto skip_finding_an_index;
1656 /* Not found, so try to find an unused spot in the FDB.
1657 * This is slightly inefficient because the strategy is knock-knock at
1658 * every possible position from 0 to 1023.
1660 for (i = 0; i < SJA1105_MAX_L2_LOOKUP_COUNT; i++) {
1661 rc = sja1105_dynamic_config_read(priv, BLK_IDX_L2_LOOKUP,
1666 if (i == SJA1105_MAX_L2_LOOKUP_COUNT) {
1667 dev_err(ds->dev, "FDB is full, cannot add entry.\n");
1670 l2_lookup.index = i;
1672 skip_finding_an_index:
1673 l2_lookup.lockeds = true;
1675 rc = sja1105_dynamic_config_write(priv, BLK_IDX_L2_LOOKUP,
1676 l2_lookup.index, &l2_lookup,
1681 /* The switch learns dynamic entries and looks up the FDB left to
1682 * right. It is possible that our addition was concurrent with the
1683 * dynamic learning of the same address, so now that the static entry
1684 * has been installed, we are certain that address learning for this
1685 * particular address has been turned off, so the dynamic entry either
1686 * is in the FDB at an index smaller than the static one, or isn't (it
1687 * can also be at a larger index, but in that case it is inactive
1688 * because the static FDB entry will match first, and the dynamic one
1689 * will eventually age out). Search for a dynamically learned address
1690 * prior to our static one and invalidate it.
1694 rc = sja1105_dynamic_config_read(priv, BLK_IDX_L2_LOOKUP,
1695 SJA1105_SEARCH, &tmp);
1698 "port %d failed to read back entry for %pM vid %d: %pe\n",
1699 port, addr, vid, ERR_PTR(rc));
1703 if (tmp.index < l2_lookup.index) {
1704 rc = sja1105_dynamic_config_write(priv, BLK_IDX_L2_LOOKUP,
1705 tmp.index, NULL, false);
1710 return sja1105_static_fdb_change(priv, port, &l2_lookup, true);
1713 int sja1105pqrs_fdb_del(struct dsa_switch *ds, int port,
1714 const unsigned char *addr, u16 vid)
1716 struct sja1105_l2_lookup_entry l2_lookup = {0};
1717 struct sja1105_private *priv = ds->priv;
1721 l2_lookup.macaddr = ether_addr_to_u64(addr);
1722 l2_lookup.vlanid = vid;
1723 l2_lookup.mask_macaddr = GENMASK_ULL(ETH_ALEN * 8 - 1, 0);
1724 l2_lookup.mask_vlanid = VLAN_VID_MASK;
1725 l2_lookup.destports = BIT(port);
1727 rc = sja1105_dynamic_config_read(priv, BLK_IDX_L2_LOOKUP,
1728 SJA1105_SEARCH, &l2_lookup);
1732 l2_lookup.destports &= ~BIT(port);
1734 /* Decide whether we remove just this port from the FDB entry,
1735 * or if we remove it completely.
1737 if (l2_lookup.destports)
1742 rc = sja1105_dynamic_config_write(priv, BLK_IDX_L2_LOOKUP,
1743 l2_lookup.index, &l2_lookup, keep);
1747 return sja1105_static_fdb_change(priv, port, &l2_lookup, keep);
1750 static int sja1105_fdb_add(struct dsa_switch *ds, int port,
1751 const unsigned char *addr, u16 vid)
1753 struct sja1105_private *priv = ds->priv;
1755 return priv->info->fdb_add_cmd(ds, port, addr, vid);
1758 static int sja1105_fdb_del(struct dsa_switch *ds, int port,
1759 const unsigned char *addr, u16 vid)
1761 struct sja1105_private *priv = ds->priv;
1763 return priv->info->fdb_del_cmd(ds, port, addr, vid);
1766 static int sja1105_fdb_dump(struct dsa_switch *ds, int port,
1767 dsa_fdb_dump_cb_t *cb, void *data)
1769 struct sja1105_private *priv = ds->priv;
1770 struct device *dev = ds->dev;
1773 for (i = 0; i < SJA1105_MAX_L2_LOOKUP_COUNT; i++) {
1774 struct sja1105_l2_lookup_entry l2_lookup = {0};
1775 u8 macaddr[ETH_ALEN];
1778 rc = sja1105_dynamic_config_read(priv, BLK_IDX_L2_LOOKUP,
1780 /* No fdb entry at i, not an issue */
1784 dev_err(dev, "Failed to dump FDB: %d\n", rc);
1788 /* FDB dump callback is per port. This means we have to
1789 * disregard a valid entry if it's not for this port, even if
1790 * only to revisit it later. This is inefficient because the
1791 * 1024-sized FDB table needs to be traversed 4 times through
1792 * SPI during a 'bridge fdb show' command.
1794 if (!(l2_lookup.destports & BIT(port)))
1797 /* We need to hide the FDB entry for unknown multicast */
1798 if (l2_lookup.macaddr == SJA1105_UNKNOWN_MULTICAST &&
1799 l2_lookup.mask_macaddr == SJA1105_UNKNOWN_MULTICAST)
1802 u64_to_ether_addr(l2_lookup.macaddr, macaddr);
1804 /* We need to hide the dsa_8021q VLANs from the user. */
1805 if (!priv->vlan_aware)
1806 l2_lookup.vlanid = 0;
1807 rc = cb(macaddr, l2_lookup.vlanid, l2_lookup.lockeds, data);
1814 static void sja1105_fast_age(struct dsa_switch *ds, int port)
1816 struct sja1105_private *priv = ds->priv;
1819 for (i = 0; i < SJA1105_MAX_L2_LOOKUP_COUNT; i++) {
1820 struct sja1105_l2_lookup_entry l2_lookup = {0};
1821 u8 macaddr[ETH_ALEN];
1824 rc = sja1105_dynamic_config_read(priv, BLK_IDX_L2_LOOKUP,
1826 /* No fdb entry at i, not an issue */
1830 dev_err(ds->dev, "Failed to read FDB: %pe\n",
1835 if (!(l2_lookup.destports & BIT(port)))
1838 /* Don't delete static FDB entries */
1839 if (l2_lookup.lockeds)
1842 u64_to_ether_addr(l2_lookup.macaddr, macaddr);
1844 rc = sja1105_fdb_del(ds, port, macaddr, l2_lookup.vlanid);
1847 "Failed to delete FDB entry %pM vid %lld: %pe\n",
1848 macaddr, l2_lookup.vlanid, ERR_PTR(rc));
1854 static int sja1105_mdb_add(struct dsa_switch *ds, int port,
1855 const struct switchdev_obj_port_mdb *mdb)
1857 return sja1105_fdb_add(ds, port, mdb->addr, mdb->vid);
1860 static int sja1105_mdb_del(struct dsa_switch *ds, int port,
1861 const struct switchdev_obj_port_mdb *mdb)
1863 return sja1105_fdb_del(ds, port, mdb->addr, mdb->vid);
1866 /* Common function for unicast and broadcast flood configuration.
1867 * Flooding is configured between each {ingress, egress} port pair, and since
1868 * the bridge's semantics are those of "egress flooding", it means we must
1869 * enable flooding towards this port from all ingress ports that are in the
1870 * same forwarding domain.
1872 static int sja1105_manage_flood_domains(struct sja1105_private *priv)
1874 struct sja1105_l2_forwarding_entry *l2_fwd;
1875 struct dsa_switch *ds = priv->ds;
1878 l2_fwd = priv->static_config.tables[BLK_IDX_L2_FORWARDING].entries;
1880 for (from = 0; from < ds->num_ports; from++) {
1881 u64 fl_domain = 0, bc_domain = 0;
1883 for (to = 0; to < priv->ds->num_ports; to++) {
1884 if (!sja1105_can_forward(l2_fwd, from, to))
1887 if (priv->ucast_egress_floods & BIT(to))
1888 fl_domain |= BIT(to);
1889 if (priv->bcast_egress_floods & BIT(to))
1890 bc_domain |= BIT(to);
1893 /* Nothing changed, nothing to do */
1894 if (l2_fwd[from].fl_domain == fl_domain &&
1895 l2_fwd[from].bc_domain == bc_domain)
1898 l2_fwd[from].fl_domain = fl_domain;
1899 l2_fwd[from].bc_domain = bc_domain;
1901 rc = sja1105_dynamic_config_write(priv, BLK_IDX_L2_FORWARDING,
1902 from, &l2_fwd[from], true);
1910 static int sja1105_bridge_member(struct dsa_switch *ds, int port,
1911 struct net_device *br, bool member)
1913 struct sja1105_l2_forwarding_entry *l2_fwd;
1914 struct sja1105_private *priv = ds->priv;
1917 l2_fwd = priv->static_config.tables[BLK_IDX_L2_FORWARDING].entries;
1919 for (i = 0; i < ds->num_ports; i++) {
1920 /* Add this port to the forwarding matrix of the
1921 * other ports in the same bridge, and viceversa.
1923 if (!dsa_is_user_port(ds, i))
1925 /* For the ports already under the bridge, only one thing needs
1926 * to be done, and that is to add this port to their
1927 * reachability domain. So we can perform the SPI write for
1928 * them immediately. However, for this port itself (the one
1929 * that is new to the bridge), we need to add all other ports
1930 * to its reachability domain. So we do that incrementally in
1931 * this loop, and perform the SPI write only at the end, once
1932 * the domain contains all other bridge ports.
1936 if (dsa_to_port(ds, i)->bridge_dev != br)
1938 sja1105_port_allow_traffic(l2_fwd, i, port, member);
1939 sja1105_port_allow_traffic(l2_fwd, port, i, member);
1941 rc = sja1105_dynamic_config_write(priv, BLK_IDX_L2_FORWARDING,
1942 i, &l2_fwd[i], true);
1947 rc = sja1105_dynamic_config_write(priv, BLK_IDX_L2_FORWARDING,
1948 port, &l2_fwd[port], true);
1952 rc = sja1105_commit_pvid(ds, port);
1956 return sja1105_manage_flood_domains(priv);
1959 static void sja1105_bridge_stp_state_set(struct dsa_switch *ds, int port,
1962 struct dsa_port *dp = dsa_to_port(ds, port);
1963 struct sja1105_private *priv = ds->priv;
1964 struct sja1105_mac_config_entry *mac;
1966 mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
1969 case BR_STATE_DISABLED:
1970 case BR_STATE_BLOCKING:
1971 /* From UM10944 description of DRPDTAG (why put this there?):
1972 * "Management traffic flows to the port regardless of the state
1973 * of the INGRESS flag". So BPDUs are still be allowed to pass.
1974 * At the moment no difference between DISABLED and BLOCKING.
1976 mac[port].ingress = false;
1977 mac[port].egress = false;
1978 mac[port].dyn_learn = false;
1980 case BR_STATE_LISTENING:
1981 mac[port].ingress = true;
1982 mac[port].egress = false;
1983 mac[port].dyn_learn = false;
1985 case BR_STATE_LEARNING:
1986 mac[port].ingress = true;
1987 mac[port].egress = false;
1988 mac[port].dyn_learn = dp->learning;
1990 case BR_STATE_FORWARDING:
1991 mac[port].ingress = true;
1992 mac[port].egress = true;
1993 mac[port].dyn_learn = dp->learning;
1996 dev_err(ds->dev, "invalid STP state: %d\n", state);
2000 sja1105_dynamic_config_write(priv, BLK_IDX_MAC_CONFIG, port,
2004 static int sja1105_bridge_join(struct dsa_switch *ds, int port,
2005 struct net_device *br)
2007 return sja1105_bridge_member(ds, port, br, true);
2010 static void sja1105_bridge_leave(struct dsa_switch *ds, int port,
2011 struct net_device *br)
2013 sja1105_bridge_member(ds, port, br, false);
2016 #define BYTES_PER_KBIT (1000LL / 8)
2018 static int sja1105_find_unused_cbs_shaper(struct sja1105_private *priv)
2022 for (i = 0; i < priv->info->num_cbs_shapers; i++)
2023 if (!priv->cbs[i].idle_slope && !priv->cbs[i].send_slope)
2029 static int sja1105_delete_cbs_shaper(struct sja1105_private *priv, int port,
2034 for (i = 0; i < priv->info->num_cbs_shapers; i++) {
2035 struct sja1105_cbs_entry *cbs = &priv->cbs[i];
2037 if (cbs->port == port && cbs->prio == prio) {
2038 memset(cbs, 0, sizeof(*cbs));
2039 return sja1105_dynamic_config_write(priv, BLK_IDX_CBS,
2047 static int sja1105_setup_tc_cbs(struct dsa_switch *ds, int port,
2048 struct tc_cbs_qopt_offload *offload)
2050 struct sja1105_private *priv = ds->priv;
2051 struct sja1105_cbs_entry *cbs;
2054 if (!offload->enable)
2055 return sja1105_delete_cbs_shaper(priv, port, offload->queue);
2057 index = sja1105_find_unused_cbs_shaper(priv);
2061 cbs = &priv->cbs[index];
2063 cbs->prio = offload->queue;
2064 /* locredit and sendslope are negative by definition. In hardware,
2065 * positive values must be provided, and the negative sign is implicit.
2067 cbs->credit_hi = offload->hicredit;
2068 cbs->credit_lo = abs(offload->locredit);
2069 /* User space is in kbits/sec, hardware in bytes/sec */
2070 cbs->idle_slope = offload->idleslope * BYTES_PER_KBIT;
2071 cbs->send_slope = abs(offload->sendslope * BYTES_PER_KBIT);
2072 /* Convert the negative values from 64-bit 2's complement
2073 * to 32-bit 2's complement (for the case of 0x80000000 whose
2074 * negative is still negative).
2076 cbs->credit_lo &= GENMASK_ULL(31, 0);
2077 cbs->send_slope &= GENMASK_ULL(31, 0);
2079 return sja1105_dynamic_config_write(priv, BLK_IDX_CBS, index, cbs,
2083 static int sja1105_reload_cbs(struct sja1105_private *priv)
2087 /* The credit based shapers are only allocated if
2088 * CONFIG_NET_SCH_CBS is enabled.
2093 for (i = 0; i < priv->info->num_cbs_shapers; i++) {
2094 struct sja1105_cbs_entry *cbs = &priv->cbs[i];
2096 if (!cbs->idle_slope && !cbs->send_slope)
2099 rc = sja1105_dynamic_config_write(priv, BLK_IDX_CBS, i, cbs,
2108 static const char * const sja1105_reset_reasons[] = {
2109 [SJA1105_VLAN_FILTERING] = "VLAN filtering",
2110 [SJA1105_RX_HWTSTAMPING] = "RX timestamping",
2111 [SJA1105_AGEING_TIME] = "Ageing time",
2112 [SJA1105_SCHEDULING] = "Time-aware scheduling",
2113 [SJA1105_BEST_EFFORT_POLICING] = "Best-effort policing",
2114 [SJA1105_VIRTUAL_LINKS] = "Virtual links",
2117 /* For situations where we need to change a setting at runtime that is only
2118 * available through the static configuration, resetting the switch in order
2119 * to upload the new static config is unavoidable. Back up the settings we
2120 * modify at runtime (currently only MAC) and restore them after uploading,
2121 * such that this operation is relatively seamless.
2123 int sja1105_static_config_reload(struct sja1105_private *priv,
2124 enum sja1105_reset_reason reason)
2126 struct ptp_system_timestamp ptp_sts_before;
2127 struct ptp_system_timestamp ptp_sts_after;
2128 int speed_mbps[SJA1105_MAX_NUM_PORTS];
2129 u16 bmcr[SJA1105_MAX_NUM_PORTS] = {0};
2130 struct sja1105_mac_config_entry *mac;
2131 struct dsa_switch *ds = priv->ds;
2137 mutex_lock(&priv->mgmt_lock);
2139 mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
2141 /* Back up the dynamic link speed changed by sja1105_adjust_port_config
2142 * in order to temporarily restore it to SJA1105_SPEED_AUTO - which the
2143 * switch wants to see in the static config in order to allow us to
2144 * change it through the dynamic interface later.
2146 for (i = 0; i < ds->num_ports; i++) {
2147 u32 reg_addr = mdiobus_c45_addr(MDIO_MMD_VEND2, MDIO_CTRL1);
2149 speed_mbps[i] = sja1105_port_speed_to_ethtool(priv,
2151 mac[i].speed = priv->info->port_speed[SJA1105_SPEED_AUTO];
2154 bmcr[i] = mdiobus_read(priv->mdio_pcs, i, reg_addr);
2157 /* No PTP operations can run right now */
2158 mutex_lock(&priv->ptp_data.lock);
2160 rc = __sja1105_ptp_gettimex(ds, &now, &ptp_sts_before);
2162 mutex_unlock(&priv->ptp_data.lock);
2166 /* Reset switch and send updated static configuration */
2167 rc = sja1105_static_config_upload(priv);
2169 mutex_unlock(&priv->ptp_data.lock);
2173 rc = __sja1105_ptp_settime(ds, 0, &ptp_sts_after);
2175 mutex_unlock(&priv->ptp_data.lock);
2179 t1 = timespec64_to_ns(&ptp_sts_before.pre_ts);
2180 t2 = timespec64_to_ns(&ptp_sts_before.post_ts);
2181 t3 = timespec64_to_ns(&ptp_sts_after.pre_ts);
2182 t4 = timespec64_to_ns(&ptp_sts_after.post_ts);
2183 /* Mid point, corresponds to pre-reset PTPCLKVAL */
2184 t12 = t1 + (t2 - t1) / 2;
2185 /* Mid point, corresponds to post-reset PTPCLKVAL, aka 0 */
2186 t34 = t3 + (t4 - t3) / 2;
2187 /* Advance PTPCLKVAL by the time it took since its readout */
2190 __sja1105_ptp_adjtime(ds, now);
2192 mutex_unlock(&priv->ptp_data.lock);
2194 dev_info(priv->ds->dev,
2195 "Reset switch and programmed static config. Reason: %s\n",
2196 sja1105_reset_reasons[reason]);
2198 /* Configure the CGU (PLLs) for MII and RMII PHYs.
2199 * For these interfaces there is no dynamic configuration
2200 * needed, since PLLs have same settings at all speeds.
2202 if (priv->info->clocking_setup) {
2203 rc = priv->info->clocking_setup(priv);
2208 for (i = 0; i < ds->num_ports; i++) {
2209 struct dw_xpcs *xpcs = priv->xpcs[i];
2212 rc = sja1105_adjust_port_config(priv, i, speed_mbps[i]);
2219 if (bmcr[i] & BMCR_ANENABLE)
2220 mode = MLO_AN_INBAND;
2221 else if (priv->fixed_link[i])
2222 mode = MLO_AN_FIXED;
2226 rc = xpcs_do_config(xpcs, priv->phy_mode[i], mode);
2230 if (!phylink_autoneg_inband(mode)) {
2231 int speed = SPEED_UNKNOWN;
2233 if (priv->phy_mode[i] == PHY_INTERFACE_MODE_2500BASEX)
2235 else if (bmcr[i] & BMCR_SPEED1000)
2237 else if (bmcr[i] & BMCR_SPEED100)
2242 xpcs_link_up(&xpcs->pcs, mode, priv->phy_mode[i],
2243 speed, DUPLEX_FULL);
2247 rc = sja1105_reload_cbs(priv);
2251 mutex_unlock(&priv->mgmt_lock);
2256 static enum dsa_tag_protocol
2257 sja1105_get_tag_protocol(struct dsa_switch *ds, int port,
2258 enum dsa_tag_protocol mp)
2260 struct sja1105_private *priv = ds->priv;
2262 return priv->info->tag_proto;
2265 /* The TPID setting belongs to the General Parameters table,
2266 * which can only be partially reconfigured at runtime (and not the TPID).
2267 * So a switch reset is required.
2269 int sja1105_vlan_filtering(struct dsa_switch *ds, int port, bool enabled,
2270 struct netlink_ext_ack *extack)
2272 struct sja1105_l2_lookup_params_entry *l2_lookup_params;
2273 struct sja1105_general_params_entry *general_params;
2274 struct sja1105_private *priv = ds->priv;
2275 struct sja1105_table *table;
2276 struct sja1105_rule *rule;
2280 list_for_each_entry(rule, &priv->flow_block.rules, list) {
2281 if (rule->type == SJA1105_RULE_VL) {
2282 NL_SET_ERR_MSG_MOD(extack,
2283 "Cannot change VLAN filtering with active VL rules");
2289 /* Enable VLAN filtering. */
2291 tpid2 = ETH_P_8021AD;
2293 /* Disable VLAN filtering. */
2294 tpid = ETH_P_SJA1105;
2295 tpid2 = ETH_P_SJA1105;
2298 if (priv->vlan_aware == enabled)
2301 priv->vlan_aware = enabled;
2303 table = &priv->static_config.tables[BLK_IDX_GENERAL_PARAMS];
2304 general_params = table->entries;
2305 /* EtherType used to identify inner tagged (C-tag) VLAN traffic */
2306 general_params->tpid = tpid;
2307 /* EtherType used to identify outer tagged (S-tag) VLAN traffic */
2308 general_params->tpid2 = tpid2;
2309 /* When VLAN filtering is on, we need to at least be able to
2310 * decode management traffic through the "backup plan".
2312 general_params->incl_srcpt1 = enabled;
2313 general_params->incl_srcpt0 = enabled;
2315 /* VLAN filtering => independent VLAN learning.
2316 * No VLAN filtering (or best effort) => shared VLAN learning.
2318 * In shared VLAN learning mode, untagged traffic still gets
2319 * pvid-tagged, and the FDB table gets populated with entries
2320 * containing the "real" (pvid or from VLAN tag) VLAN ID.
2321 * However the switch performs a masked L2 lookup in the FDB,
2322 * effectively only looking up a frame's DMAC (and not VID) for the
2323 * forwarding decision.
2325 * This is extremely convenient for us, because in modes with
2326 * vlan_filtering=0, dsa_8021q actually installs unique pvid's into
2327 * each front panel port. This is good for identification but breaks
2328 * learning badly - the VID of the learnt FDB entry is unique, aka
2329 * no frames coming from any other port are going to have it. So
2330 * for forwarding purposes, this is as though learning was broken
2331 * (all frames get flooded).
2333 table = &priv->static_config.tables[BLK_IDX_L2_LOOKUP_PARAMS];
2334 l2_lookup_params = table->entries;
2335 l2_lookup_params->shared_learn = !priv->vlan_aware;
2337 for (port = 0; port < ds->num_ports; port++) {
2338 if (dsa_is_unused_port(ds, port))
2341 rc = sja1105_commit_pvid(ds, port);
2346 rc = sja1105_static_config_reload(priv, SJA1105_VLAN_FILTERING);
2348 NL_SET_ERR_MSG_MOD(extack, "Failed to change VLAN Ethertype");
2353 static int sja1105_vlan_add(struct sja1105_private *priv, int port, u16 vid,
2354 u16 flags, bool allowed_ingress)
2356 struct sja1105_vlan_lookup_entry *vlan;
2357 struct sja1105_table *table;
2360 table = &priv->static_config.tables[BLK_IDX_VLAN_LOOKUP];
2362 match = sja1105_is_vlan_configured(priv, vid);
2364 rc = sja1105_table_resize(table, table->entry_count + 1);
2367 match = table->entry_count - 1;
2370 /* Assign pointer after the resize (it's new memory) */
2371 vlan = table->entries;
2373 vlan[match].type_entry = SJA1110_VLAN_D_TAG;
2374 vlan[match].vlanid = vid;
2375 vlan[match].vlan_bc |= BIT(port);
2377 if (allowed_ingress)
2378 vlan[match].vmemb_port |= BIT(port);
2380 vlan[match].vmemb_port &= ~BIT(port);
2382 if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
2383 vlan[match].tag_port &= ~BIT(port);
2385 vlan[match].tag_port |= BIT(port);
2387 return sja1105_dynamic_config_write(priv, BLK_IDX_VLAN_LOOKUP, vid,
2388 &vlan[match], true);
2391 static int sja1105_vlan_del(struct sja1105_private *priv, int port, u16 vid)
2393 struct sja1105_vlan_lookup_entry *vlan;
2394 struct sja1105_table *table;
2398 table = &priv->static_config.tables[BLK_IDX_VLAN_LOOKUP];
2400 match = sja1105_is_vlan_configured(priv, vid);
2401 /* Can't delete a missing entry. */
2405 /* Assign pointer after the resize (it's new memory) */
2406 vlan = table->entries;
2408 vlan[match].vlanid = vid;
2409 vlan[match].vlan_bc &= ~BIT(port);
2410 vlan[match].vmemb_port &= ~BIT(port);
2411 /* Also unset tag_port, just so we don't have a confusing bitmap
2412 * (no practical purpose).
2414 vlan[match].tag_port &= ~BIT(port);
2416 /* If there's no port left as member of this VLAN,
2417 * it's time for it to go.
2419 if (!vlan[match].vmemb_port)
2422 rc = sja1105_dynamic_config_write(priv, BLK_IDX_VLAN_LOOKUP, vid,
2423 &vlan[match], keep);
2428 return sja1105_table_delete_entry(table, match);
2433 static int sja1105_bridge_vlan_add(struct dsa_switch *ds, int port,
2434 const struct switchdev_obj_port_vlan *vlan,
2435 struct netlink_ext_ack *extack)
2437 struct sja1105_private *priv = ds->priv;
2438 u16 flags = vlan->flags;
2441 /* Be sure to deny alterations to the configuration done by tag_8021q.
2443 if (vid_is_dsa_8021q(vlan->vid)) {
2444 NL_SET_ERR_MSG_MOD(extack,
2445 "Range 1024-3071 reserved for dsa_8021q operation");
2449 /* Always install bridge VLANs as egress-tagged on CPU and DSA ports */
2450 if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))
2453 rc = sja1105_vlan_add(priv, port, vlan->vid, flags, true);
2457 if (vlan->flags & BRIDGE_VLAN_INFO_PVID)
2458 priv->bridge_pvid[port] = vlan->vid;
2460 return sja1105_commit_pvid(ds, port);
2463 static int sja1105_bridge_vlan_del(struct dsa_switch *ds, int port,
2464 const struct switchdev_obj_port_vlan *vlan)
2466 struct sja1105_private *priv = ds->priv;
2469 rc = sja1105_vlan_del(priv, port, vlan->vid);
2473 /* In case the pvid was deleted, make sure that untagged packets will
2476 return sja1105_commit_pvid(ds, port);
2479 static int sja1105_dsa_8021q_vlan_add(struct dsa_switch *ds, int port, u16 vid,
2482 struct sja1105_private *priv = ds->priv;
2483 bool allowed_ingress = true;
2486 /* Prevent attackers from trying to inject a DSA tag from
2487 * the outside world.
2489 if (dsa_is_user_port(ds, port))
2490 allowed_ingress = false;
2492 rc = sja1105_vlan_add(priv, port, vid, flags, allowed_ingress);
2496 if (flags & BRIDGE_VLAN_INFO_PVID)
2497 priv->tag_8021q_pvid[port] = vid;
2499 return sja1105_commit_pvid(ds, port);
2502 static int sja1105_dsa_8021q_vlan_del(struct dsa_switch *ds, int port, u16 vid)
2504 struct sja1105_private *priv = ds->priv;
2506 return sja1105_vlan_del(priv, port, vid);
2509 static int sja1105_prechangeupper(struct dsa_switch *ds, int port,
2510 struct netdev_notifier_changeupper_info *info)
2512 struct netlink_ext_ack *extack = info->info.extack;
2513 struct net_device *upper = info->upper_dev;
2514 struct dsa_switch_tree *dst = ds->dst;
2515 struct dsa_port *dp;
2517 if (is_vlan_dev(upper)) {
2518 NL_SET_ERR_MSG_MOD(extack, "8021q uppers are not supported");
2522 if (netif_is_bridge_master(upper)) {
2523 list_for_each_entry(dp, &dst->ports, list) {
2524 if (dp->bridge_dev && dp->bridge_dev != upper &&
2525 br_vlan_enabled(dp->bridge_dev)) {
2526 NL_SET_ERR_MSG_MOD(extack,
2527 "Only one VLAN-aware bridge is supported");
2536 static void sja1105_port_disable(struct dsa_switch *ds, int port)
2538 struct sja1105_private *priv = ds->priv;
2539 struct sja1105_port *sp = &priv->ports[port];
2541 if (!dsa_is_user_port(ds, port))
2544 kthread_cancel_work_sync(&sp->xmit_work);
2545 skb_queue_purge(&sp->xmit_queue);
2548 static int sja1105_mgmt_xmit(struct dsa_switch *ds, int port, int slot,
2549 struct sk_buff *skb, bool takets)
2551 struct sja1105_mgmt_entry mgmt_route = {0};
2552 struct sja1105_private *priv = ds->priv;
2559 mgmt_route.macaddr = ether_addr_to_u64(hdr->h_dest);
2560 mgmt_route.destports = BIT(port);
2561 mgmt_route.enfport = 1;
2562 mgmt_route.tsreg = 0;
2563 mgmt_route.takets = takets;
2565 rc = sja1105_dynamic_config_write(priv, BLK_IDX_MGMT_ROUTE,
2566 slot, &mgmt_route, true);
2572 /* Transfer skb to the host port. */
2573 dsa_enqueue_skb(skb, dsa_to_port(ds, port)->slave);
2575 /* Wait until the switch has processed the frame */
2577 rc = sja1105_dynamic_config_read(priv, BLK_IDX_MGMT_ROUTE,
2580 dev_err_ratelimited(priv->ds->dev,
2581 "failed to poll for mgmt route\n");
2585 /* UM10944: The ENFPORT flag of the respective entry is
2586 * cleared when a match is found. The host can use this
2587 * flag as an acknowledgment.
2590 } while (mgmt_route.enfport && --timeout);
2593 /* Clean up the management route so that a follow-up
2594 * frame may not match on it by mistake.
2595 * This is only hardware supported on P/Q/R/S - on E/T it is
2596 * a no-op and we are silently discarding the -EOPNOTSUPP.
2598 sja1105_dynamic_config_write(priv, BLK_IDX_MGMT_ROUTE,
2599 slot, &mgmt_route, false);
2600 dev_err_ratelimited(priv->ds->dev, "xmit timed out\n");
2603 return NETDEV_TX_OK;
2606 #define work_to_port(work) \
2607 container_of((work), struct sja1105_port, xmit_work)
2608 #define tagger_to_sja1105(t) \
2609 container_of((t), struct sja1105_private, tagger_data)
2611 /* Deferred work is unfortunately necessary because setting up the management
2612 * route cannot be done from atomit context (SPI transfer takes a sleepable
2615 static void sja1105_port_deferred_xmit(struct kthread_work *work)
2617 struct sja1105_port *sp = work_to_port(work);
2618 struct sja1105_tagger_data *tagger_data = sp->data;
2619 struct sja1105_private *priv = tagger_to_sja1105(tagger_data);
2620 int port = sp - priv->ports;
2621 struct sk_buff *skb;
2623 while ((skb = skb_dequeue(&sp->xmit_queue)) != NULL) {
2624 struct sk_buff *clone = SJA1105_SKB_CB(skb)->clone;
2626 mutex_lock(&priv->mgmt_lock);
2628 sja1105_mgmt_xmit(priv->ds, port, 0, skb, !!clone);
2630 /* The clone, if there, was made by dsa_skb_tx_timestamp */
2632 sja1105_ptp_txtstamp_skb(priv->ds, port, clone);
2634 mutex_unlock(&priv->mgmt_lock);
2638 /* The MAXAGE setting belongs to the L2 Forwarding Parameters table,
2639 * which cannot be reconfigured at runtime. So a switch reset is required.
2641 static int sja1105_set_ageing_time(struct dsa_switch *ds,
2642 unsigned int ageing_time)
2644 struct sja1105_l2_lookup_params_entry *l2_lookup_params;
2645 struct sja1105_private *priv = ds->priv;
2646 struct sja1105_table *table;
2647 unsigned int maxage;
2649 table = &priv->static_config.tables[BLK_IDX_L2_LOOKUP_PARAMS];
2650 l2_lookup_params = table->entries;
2652 maxage = SJA1105_AGEING_TIME_MS(ageing_time);
2654 if (l2_lookup_params->maxage == maxage)
2657 l2_lookup_params->maxage = maxage;
2659 return sja1105_static_config_reload(priv, SJA1105_AGEING_TIME);
2662 static int sja1105_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
2664 struct sja1105_l2_policing_entry *policing;
2665 struct sja1105_private *priv = ds->priv;
2667 new_mtu += VLAN_ETH_HLEN + ETH_FCS_LEN;
2669 if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))
2670 new_mtu += VLAN_HLEN;
2672 policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries;
2674 if (policing[port].maxlen == new_mtu)
2677 policing[port].maxlen = new_mtu;
2679 return sja1105_static_config_reload(priv, SJA1105_BEST_EFFORT_POLICING);
2682 static int sja1105_get_max_mtu(struct dsa_switch *ds, int port)
2684 return 2043 - VLAN_ETH_HLEN - ETH_FCS_LEN;
2687 static int sja1105_port_setup_tc(struct dsa_switch *ds, int port,
2688 enum tc_setup_type type,
2692 case TC_SETUP_QDISC_TAPRIO:
2693 return sja1105_setup_tc_taprio(ds, port, type_data);
2694 case TC_SETUP_QDISC_CBS:
2695 return sja1105_setup_tc_cbs(ds, port, type_data);
2701 /* We have a single mirror (@to) port, but can configure ingress and egress
2702 * mirroring on all other (@from) ports.
2703 * We need to allow mirroring rules only as long as the @to port is always the
2704 * same, and we need to unset the @to port from mirr_port only when there is no
2705 * mirroring rule that references it.
2707 static int sja1105_mirror_apply(struct sja1105_private *priv, int from, int to,
2708 bool ingress, bool enabled)
2710 struct sja1105_general_params_entry *general_params;
2711 struct sja1105_mac_config_entry *mac;
2712 struct dsa_switch *ds = priv->ds;
2713 struct sja1105_table *table;
2714 bool already_enabled;
2718 table = &priv->static_config.tables[BLK_IDX_GENERAL_PARAMS];
2719 general_params = table->entries;
2721 mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
2723 already_enabled = (general_params->mirr_port != ds->num_ports);
2724 if (already_enabled && enabled && general_params->mirr_port != to) {
2725 dev_err(priv->ds->dev,
2726 "Delete mirroring rules towards port %llu first\n",
2727 general_params->mirr_port);
2736 /* Anybody still referencing mirr_port? */
2737 for (port = 0; port < ds->num_ports; port++) {
2738 if (mac[port].ing_mirr || mac[port].egr_mirr) {
2743 /* Unset already_enabled for next time */
2745 new_mirr_port = ds->num_ports;
2747 if (new_mirr_port != general_params->mirr_port) {
2748 general_params->mirr_port = new_mirr_port;
2750 rc = sja1105_dynamic_config_write(priv, BLK_IDX_GENERAL_PARAMS,
2751 0, general_params, true);
2757 mac[from].ing_mirr = enabled;
2759 mac[from].egr_mirr = enabled;
2761 return sja1105_dynamic_config_write(priv, BLK_IDX_MAC_CONFIG, from,
2765 static int sja1105_mirror_add(struct dsa_switch *ds, int port,
2766 struct dsa_mall_mirror_tc_entry *mirror,
2769 return sja1105_mirror_apply(ds->priv, port, mirror->to_local_port,
2773 static void sja1105_mirror_del(struct dsa_switch *ds, int port,
2774 struct dsa_mall_mirror_tc_entry *mirror)
2776 sja1105_mirror_apply(ds->priv, port, mirror->to_local_port,
2777 mirror->ingress, false);
2780 static int sja1105_port_policer_add(struct dsa_switch *ds, int port,
2781 struct dsa_mall_policer_tc_entry *policer)
2783 struct sja1105_l2_policing_entry *policing;
2784 struct sja1105_private *priv = ds->priv;
2786 policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries;
2788 /* In hardware, every 8 microseconds the credit level is incremented by
2789 * the value of RATE bytes divided by 64, up to a maximum of SMAX
2792 policing[port].rate = div_u64(512 * policer->rate_bytes_per_sec,
2794 policing[port].smax = policer->burst;
2796 return sja1105_static_config_reload(priv, SJA1105_BEST_EFFORT_POLICING);
2799 static void sja1105_port_policer_del(struct dsa_switch *ds, int port)
2801 struct sja1105_l2_policing_entry *policing;
2802 struct sja1105_private *priv = ds->priv;
2804 policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries;
2806 policing[port].rate = SJA1105_RATE_MBPS(1000);
2807 policing[port].smax = 65535;
2809 sja1105_static_config_reload(priv, SJA1105_BEST_EFFORT_POLICING);
2812 static int sja1105_port_set_learning(struct sja1105_private *priv, int port,
2815 struct sja1105_mac_config_entry *mac;
2817 mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
2819 mac[port].dyn_learn = enabled;
2821 return sja1105_dynamic_config_write(priv, BLK_IDX_MAC_CONFIG, port,
2825 static int sja1105_port_ucast_bcast_flood(struct sja1105_private *priv, int to,
2826 struct switchdev_brport_flags flags)
2828 if (flags.mask & BR_FLOOD) {
2829 if (flags.val & BR_FLOOD)
2830 priv->ucast_egress_floods |= BIT(to);
2832 priv->ucast_egress_floods &= ~BIT(to);
2835 if (flags.mask & BR_BCAST_FLOOD) {
2836 if (flags.val & BR_BCAST_FLOOD)
2837 priv->bcast_egress_floods |= BIT(to);
2839 priv->bcast_egress_floods &= ~BIT(to);
2842 return sja1105_manage_flood_domains(priv);
2845 static int sja1105_port_mcast_flood(struct sja1105_private *priv, int to,
2846 struct switchdev_brport_flags flags,
2847 struct netlink_ext_ack *extack)
2849 struct sja1105_l2_lookup_entry *l2_lookup;
2850 struct sja1105_table *table;
2853 table = &priv->static_config.tables[BLK_IDX_L2_LOOKUP];
2854 l2_lookup = table->entries;
2856 for (match = 0; match < table->entry_count; match++)
2857 if (l2_lookup[match].macaddr == SJA1105_UNKNOWN_MULTICAST &&
2858 l2_lookup[match].mask_macaddr == SJA1105_UNKNOWN_MULTICAST)
2861 if (match == table->entry_count) {
2862 NL_SET_ERR_MSG_MOD(extack,
2863 "Could not find FDB entry for unknown multicast");
2867 if (flags.val & BR_MCAST_FLOOD)
2868 l2_lookup[match].destports |= BIT(to);
2870 l2_lookup[match].destports &= ~BIT(to);
2872 return sja1105_dynamic_config_write(priv, BLK_IDX_L2_LOOKUP,
2873 l2_lookup[match].index,
2878 static int sja1105_port_pre_bridge_flags(struct dsa_switch *ds, int port,
2879 struct switchdev_brport_flags flags,
2880 struct netlink_ext_ack *extack)
2882 struct sja1105_private *priv = ds->priv;
2884 if (flags.mask & ~(BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
2888 if (flags.mask & (BR_FLOOD | BR_MCAST_FLOOD) &&
2889 !priv->info->can_limit_mcast_flood) {
2890 bool multicast = !!(flags.val & BR_MCAST_FLOOD);
2891 bool unicast = !!(flags.val & BR_FLOOD);
2893 if (unicast != multicast) {
2894 NL_SET_ERR_MSG_MOD(extack,
2895 "This chip cannot configure multicast flooding independently of unicast");
2903 static int sja1105_port_bridge_flags(struct dsa_switch *ds, int port,
2904 struct switchdev_brport_flags flags,
2905 struct netlink_ext_ack *extack)
2907 struct sja1105_private *priv = ds->priv;
2910 if (flags.mask & BR_LEARNING) {
2911 bool learn_ena = !!(flags.val & BR_LEARNING);
2913 rc = sja1105_port_set_learning(priv, port, learn_ena);
2918 if (flags.mask & (BR_FLOOD | BR_BCAST_FLOOD)) {
2919 rc = sja1105_port_ucast_bcast_flood(priv, port, flags);
2924 /* For chips that can't offload BR_MCAST_FLOOD independently, there
2925 * is nothing to do here, we ensured the configuration is in sync by
2926 * offloading BR_FLOOD.
2928 if (flags.mask & BR_MCAST_FLOOD && priv->info->can_limit_mcast_flood) {
2929 rc = sja1105_port_mcast_flood(priv, port, flags,
2938 static void sja1105_teardown_ports(struct sja1105_private *priv)
2940 struct dsa_switch *ds = priv->ds;
2943 for (port = 0; port < ds->num_ports; port++) {
2944 struct sja1105_port *sp = &priv->ports[port];
2946 if (sp->xmit_worker)
2947 kthread_destroy_worker(sp->xmit_worker);
2951 static int sja1105_setup_ports(struct sja1105_private *priv)
2953 struct sja1105_tagger_data *tagger_data = &priv->tagger_data;
2954 struct dsa_switch *ds = priv->ds;
2957 /* Connections between dsa_port and sja1105_port */
2958 for (port = 0; port < ds->num_ports; port++) {
2959 struct sja1105_port *sp = &priv->ports[port];
2960 struct dsa_port *dp = dsa_to_port(ds, port);
2961 struct kthread_worker *worker;
2962 struct net_device *slave;
2964 if (!dsa_port_is_user(dp))
2969 sp->data = tagger_data;
2971 kthread_init_work(&sp->xmit_work, sja1105_port_deferred_xmit);
2972 worker = kthread_create_worker(0, "%s_xmit", slave->name);
2973 if (IS_ERR(worker)) {
2974 rc = PTR_ERR(worker);
2976 "failed to create deferred xmit thread: %d\n",
2978 goto out_destroy_workers;
2980 sp->xmit_worker = worker;
2981 skb_queue_head_init(&sp->xmit_queue);
2986 out_destroy_workers:
2987 sja1105_teardown_ports(priv);
2991 /* The programming model for the SJA1105 switch is "all-at-once" via static
2992 * configuration tables. Some of these can be dynamically modified at runtime,
2993 * but not the xMII mode parameters table.
2994 * Furthermode, some PHYs may not have crystals for generating their clocks
2995 * (e.g. RMII). Instead, their 50MHz clock is supplied via the SJA1105 port's
2996 * ref_clk pin. So port clocking needs to be initialized early, before
2997 * connecting to PHYs is attempted, otherwise they won't respond through MDIO.
2998 * Setting correct PHY link speed does not matter now.
2999 * But dsa_slave_phy_setup is called later than sja1105_setup, so the PHY
3000 * bindings are not yet parsed by DSA core. We need to parse early so that we
3001 * can populate the xMII mode parameters table.
3003 static int sja1105_setup(struct dsa_switch *ds)
3005 struct sja1105_private *priv = ds->priv;
3008 if (priv->info->disable_microcontroller) {
3009 rc = priv->info->disable_microcontroller(priv);
3012 "Failed to disable microcontroller: %pe\n",
3018 /* Create and send configuration down to device */
3019 rc = sja1105_static_config_load(priv);
3021 dev_err(ds->dev, "Failed to load static config: %d\n", rc);
3025 /* Configure the CGU (PHY link modes and speeds) */
3026 if (priv->info->clocking_setup) {
3027 rc = priv->info->clocking_setup(priv);
3030 "Failed to configure MII clocking: %pe\n",
3032 goto out_static_config_free;
3036 rc = sja1105_setup_ports(priv);
3038 goto out_static_config_free;
3040 sja1105_tas_setup(ds);
3041 sja1105_flower_setup(ds);
3043 rc = sja1105_ptp_clock_register(ds);
3045 dev_err(ds->dev, "Failed to register PTP clock: %d\n", rc);
3046 goto out_flower_teardown;
3049 rc = sja1105_mdiobus_register(ds);
3051 dev_err(ds->dev, "Failed to register MDIO bus: %pe\n",
3053 goto out_ptp_clock_unregister;
3056 rc = sja1105_devlink_setup(ds);
3058 goto out_mdiobus_unregister;
3061 rc = dsa_tag_8021q_register(ds, htons(ETH_P_8021Q));
3064 goto out_devlink_teardown;
3066 /* On SJA1105, VLAN filtering per se is always enabled in hardware.
3067 * The only thing we can do to disable it is lie about what the 802.1Q
3069 * So it will still try to apply VLAN filtering, but all ingress
3070 * traffic (except frames received with EtherType of ETH_P_SJA1105)
3071 * will be internally tagged with a distorted VLAN header where the
3072 * TPID is ETH_P_SJA1105, and the VLAN ID is the port pvid.
3074 ds->vlan_filtering_is_global = true;
3075 ds->untag_bridge_pvid = true;
3076 /* tag_8021q has 3 bits for the VBID, and the value 0 is reserved */
3077 ds->num_fwd_offloading_bridges = 7;
3079 /* Advertise the 8 egress queues */
3080 ds->num_tx_queues = SJA1105_NUM_TC;
3082 ds->mtu_enforcement_ingress = true;
3083 ds->assisted_learning_on_cpu_port = true;
3087 out_devlink_teardown:
3088 sja1105_devlink_teardown(ds);
3089 out_mdiobus_unregister:
3090 sja1105_mdiobus_unregister(ds);
3091 out_ptp_clock_unregister:
3092 sja1105_ptp_clock_unregister(ds);
3093 out_flower_teardown:
3094 sja1105_flower_teardown(ds);
3095 sja1105_tas_teardown(ds);
3096 sja1105_teardown_ports(priv);
3097 out_static_config_free:
3098 sja1105_static_config_free(&priv->static_config);
3103 static void sja1105_teardown(struct dsa_switch *ds)
3105 struct sja1105_private *priv = ds->priv;
3108 dsa_tag_8021q_unregister(ds);
3111 sja1105_devlink_teardown(ds);
3112 sja1105_mdiobus_unregister(ds);
3113 sja1105_ptp_clock_unregister(ds);
3114 sja1105_flower_teardown(ds);
3115 sja1105_tas_teardown(ds);
3116 sja1105_teardown_ports(priv);
3117 sja1105_static_config_free(&priv->static_config);
3120 const struct dsa_switch_ops sja1105_switch_ops = {
3121 .get_tag_protocol = sja1105_get_tag_protocol,
3122 .setup = sja1105_setup,
3123 .teardown = sja1105_teardown,
3124 .set_ageing_time = sja1105_set_ageing_time,
3125 .port_change_mtu = sja1105_change_mtu,
3126 .port_max_mtu = sja1105_get_max_mtu,
3127 .phylink_validate = sja1105_phylink_validate,
3128 .phylink_mac_config = sja1105_mac_config,
3129 .phylink_mac_link_up = sja1105_mac_link_up,
3130 .phylink_mac_link_down = sja1105_mac_link_down,
3131 .get_strings = sja1105_get_strings,
3132 .get_ethtool_stats = sja1105_get_ethtool_stats,
3133 .get_sset_count = sja1105_get_sset_count,
3134 .get_ts_info = sja1105_get_ts_info,
3135 .port_disable = sja1105_port_disable,
3136 .port_fdb_dump = sja1105_fdb_dump,
3137 .port_fdb_add = sja1105_fdb_add,
3138 .port_fdb_del = sja1105_fdb_del,
3139 .port_fast_age = sja1105_fast_age,
3140 .port_bridge_join = sja1105_bridge_join,
3141 .port_bridge_leave = sja1105_bridge_leave,
3142 .port_pre_bridge_flags = sja1105_port_pre_bridge_flags,
3143 .port_bridge_flags = sja1105_port_bridge_flags,
3144 .port_stp_state_set = sja1105_bridge_stp_state_set,
3145 .port_vlan_filtering = sja1105_vlan_filtering,
3146 .port_vlan_add = sja1105_bridge_vlan_add,
3147 .port_vlan_del = sja1105_bridge_vlan_del,
3148 .port_mdb_add = sja1105_mdb_add,
3149 .port_mdb_del = sja1105_mdb_del,
3150 .port_hwtstamp_get = sja1105_hwtstamp_get,
3151 .port_hwtstamp_set = sja1105_hwtstamp_set,
3152 .port_rxtstamp = sja1105_port_rxtstamp,
3153 .port_txtstamp = sja1105_port_txtstamp,
3154 .port_setup_tc = sja1105_port_setup_tc,
3155 .port_mirror_add = sja1105_mirror_add,
3156 .port_mirror_del = sja1105_mirror_del,
3157 .port_policer_add = sja1105_port_policer_add,
3158 .port_policer_del = sja1105_port_policer_del,
3159 .cls_flower_add = sja1105_cls_flower_add,
3160 .cls_flower_del = sja1105_cls_flower_del,
3161 .cls_flower_stats = sja1105_cls_flower_stats,
3162 .devlink_info_get = sja1105_devlink_info_get,
3163 .tag_8021q_vlan_add = sja1105_dsa_8021q_vlan_add,
3164 .tag_8021q_vlan_del = sja1105_dsa_8021q_vlan_del,
3165 .port_prechangeupper = sja1105_prechangeupper,
3166 .port_bridge_tx_fwd_offload = dsa_tag_8021q_bridge_tx_fwd_offload,
3167 .port_bridge_tx_fwd_unoffload = dsa_tag_8021q_bridge_tx_fwd_unoffload,
3169 EXPORT_SYMBOL_GPL(sja1105_switch_ops);
3171 static const struct of_device_id sja1105_dt_ids[];
3173 static int sja1105_check_device_id(struct sja1105_private *priv)
3175 const struct sja1105_regs *regs = priv->info->regs;
3176 u8 prod_id[SJA1105_SIZE_DEVICE_ID] = {0};
3177 struct device *dev = &priv->spidev->dev;
3178 const struct of_device_id *match;
3183 rc = sja1105_xfer_u32(priv, SPI_READ, regs->device_id, &device_id,
3188 rc = sja1105_xfer_buf(priv, SPI_READ, regs->prod_id, prod_id,
3189 SJA1105_SIZE_DEVICE_ID);
3193 sja1105_unpack(prod_id, &part_no, 19, 4, SJA1105_SIZE_DEVICE_ID);
3195 for (match = sja1105_dt_ids; match->compatible[0]; match++) {
3196 const struct sja1105_info *info = match->data;
3198 /* Is what's been probed in our match table at all? */
3199 if (info->device_id != device_id || info->part_no != part_no)
3202 /* But is it what's in the device tree? */
3203 if (priv->info->device_id != device_id ||
3204 priv->info->part_no != part_no) {
3205 dev_warn(dev, "Device tree specifies chip %s but found %s, please fix it!\n",
3206 priv->info->name, info->name);
3207 /* It isn't. No problem, pick that up. */
3214 dev_err(dev, "Unexpected {device ID, part number}: 0x%x 0x%llx\n",
3215 device_id, part_no);
3220 static int sja1105_probe(struct spi_device *spi)
3222 struct device *dev = &spi->dev;
3223 struct sja1105_private *priv;
3224 size_t max_xfer, max_msg;
3225 struct dsa_switch *ds;
3228 if (!dev->of_node) {
3229 dev_err(dev, "No DTS bindings for SJA1105 driver\n");
3233 priv = devm_kzalloc(dev, sizeof(struct sja1105_private), GFP_KERNEL);
3237 /* Configure the optional reset pin and bring up switch */
3238 priv->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
3239 if (IS_ERR(priv->reset_gpio))
3240 dev_dbg(dev, "reset-gpios not defined, ignoring\n");
3242 sja1105_hw_reset(priv->reset_gpio, 1, 1);
3244 /* Populate our driver private structure (priv) based on
3245 * the device tree node that was probed (spi)
3248 spi_set_drvdata(spi, priv);
3250 /* Configure the SPI bus */
3251 spi->bits_per_word = 8;
3252 rc = spi_setup(spi);
3254 dev_err(dev, "Could not init SPI\n");
3258 /* In sja1105_xfer, we send spi_messages composed of two spi_transfers:
3259 * a small one for the message header and another one for the current
3260 * chunk of the packed buffer.
3261 * Check that the restrictions imposed by the SPI controller are
3262 * respected: the chunk buffer is smaller than the max transfer size,
3263 * and the total length of the chunk plus its message header is smaller
3264 * than the max message size.
3265 * We do that during probe time since the maximum transfer size is a
3266 * runtime invariant.
3268 max_xfer = spi_max_transfer_size(spi);
3269 max_msg = spi_max_message_size(spi);
3271 /* We need to send at least one 64-bit word of SPI payload per message
3272 * in order to be able to make useful progress.
3274 if (max_msg < SJA1105_SIZE_SPI_MSG_HEADER + 8) {
3275 dev_err(dev, "SPI master cannot send large enough buffers, aborting\n");
3279 priv->max_xfer_len = SJA1105_SIZE_SPI_MSG_MAXLEN;
3280 if (priv->max_xfer_len > max_xfer)
3281 priv->max_xfer_len = max_xfer;
3282 if (priv->max_xfer_len > max_msg - SJA1105_SIZE_SPI_MSG_HEADER)
3283 priv->max_xfer_len = max_msg - SJA1105_SIZE_SPI_MSG_HEADER;
3285 priv->info = of_device_get_match_data(dev);
3287 /* Detect hardware device */
3288 rc = sja1105_check_device_id(priv);
3290 dev_err(dev, "Device ID check failed: %d\n", rc);
3294 dev_info(dev, "Probed switch chip: %s\n", priv->info->name);
3296 ds = devm_kzalloc(dev, sizeof(*ds), GFP_KERNEL);
3301 ds->num_ports = priv->info->num_ports;
3302 ds->ops = &sja1105_switch_ops;
3306 mutex_init(&priv->ptp_data.lock);
3307 mutex_init(&priv->mgmt_lock);
3309 rc = sja1105_parse_dt(priv);
3311 dev_err(ds->dev, "Failed to parse DT: %d\n", rc);
3315 /* Error out early if internal delays are required through DT
3316 * and we can't apply them.
3318 rc = sja1105_parse_rgmii_delays(priv);
3320 dev_err(ds->dev, "RGMII delay not supported\n");
3324 if (IS_ENABLED(CONFIG_NET_SCH_CBS)) {
3325 priv->cbs = devm_kcalloc(dev, priv->info->num_cbs_shapers,
3326 sizeof(struct sja1105_cbs_entry),
3332 return dsa_register_switch(priv->ds);
3335 static int sja1105_remove(struct spi_device *spi)
3337 struct sja1105_private *priv = spi_get_drvdata(spi);
3342 dsa_unregister_switch(priv->ds);
3344 spi_set_drvdata(spi, NULL);
3349 static void sja1105_shutdown(struct spi_device *spi)
3351 struct sja1105_private *priv = spi_get_drvdata(spi);
3356 dsa_switch_shutdown(priv->ds);
3358 spi_set_drvdata(spi, NULL);
3361 static const struct of_device_id sja1105_dt_ids[] = {
3362 { .compatible = "nxp,sja1105e", .data = &sja1105e_info },
3363 { .compatible = "nxp,sja1105t", .data = &sja1105t_info },
3364 { .compatible = "nxp,sja1105p", .data = &sja1105p_info },
3365 { .compatible = "nxp,sja1105q", .data = &sja1105q_info },
3366 { .compatible = "nxp,sja1105r", .data = &sja1105r_info },
3367 { .compatible = "nxp,sja1105s", .data = &sja1105s_info },
3368 { .compatible = "nxp,sja1110a", .data = &sja1110a_info },
3369 { .compatible = "nxp,sja1110b", .data = &sja1110b_info },
3370 { .compatible = "nxp,sja1110c", .data = &sja1110c_info },
3371 { .compatible = "nxp,sja1110d", .data = &sja1110d_info },
3374 MODULE_DEVICE_TABLE(of, sja1105_dt_ids);
3376 static struct spi_driver sja1105_driver = {
3379 .owner = THIS_MODULE,
3380 .of_match_table = of_match_ptr(sja1105_dt_ids),
3382 .probe = sja1105_probe,
3383 .remove = sja1105_remove,
3384 .shutdown = sja1105_shutdown,
3387 module_spi_driver(sja1105_driver);
3389 MODULE_AUTHOR("Vladimir Oltean <olteanv@gmail.com>");
3390 MODULE_AUTHOR("Georg Waibel <georg.waibel@sensor-technik.de>");
3391 MODULE_DESCRIPTION("SJA1105 Driver");
3392 MODULE_LICENSE("GPL v2");