2 * Broadcom Starfighter 2 DSA switch CFP support
4 * Copyright (C) 2016, Broadcom
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/list.h>
13 #include <linux/ethtool.h>
14 #include <linux/if_ether.h>
16 #include <linux/netdevice.h>
18 #include <linux/bitmap.h>
19 #include <net/flow_offload.h>
22 #include "bcm_sf2_regs.h"
26 struct ethtool_rx_flow_spec fs;
27 struct list_head next;
30 struct cfp_udf_slice_layout {
31 u8 slices[UDFS_PER_SLICE];
36 struct cfp_udf_layout {
37 struct cfp_udf_slice_layout udfs[UDF_NUM_SLICES];
40 static const u8 zero_slice[UDFS_PER_SLICE] = { };
42 /* UDF slices layout for a TCPv4/UDPv4 specification */
43 static const struct cfp_udf_layout udf_tcpip4_layout = {
47 /* End of L2, byte offset 12, src IP[0:15] */
49 /* End of L2, byte offset 14, src IP[16:31] */
51 /* End of L2, byte offset 16, dst IP[0:15] */
53 /* End of L2, byte offset 18, dst IP[16:31] */
55 /* End of L3, byte offset 0, src port */
57 /* End of L3, byte offset 2, dst port */
61 .mask_value = L3_FRAMING_MASK | IPPROTO_MASK | IP_FRAG,
62 .base_offset = CORE_UDF_0_A_0_8_PORT_0 + UDF_SLICE_OFFSET,
67 /* UDF slices layout for a TCPv6/UDPv6 specification */
68 static const struct cfp_udf_layout udf_tcpip6_layout = {
72 /* End of L2, byte offset 8, src IP[0:15] */
74 /* End of L2, byte offset 10, src IP[16:31] */
76 /* End of L2, byte offset 12, src IP[32:47] */
78 /* End of L2, byte offset 14, src IP[48:63] */
80 /* End of L2, byte offset 16, src IP[64:79] */
82 /* End of L2, byte offset 18, src IP[80:95] */
84 /* End of L2, byte offset 20, src IP[96:111] */
86 /* End of L2, byte offset 22, src IP[112:127] */
88 /* End of L3, byte offset 0, src port */
91 .mask_value = L3_FRAMING_MASK | IPPROTO_MASK | IP_FRAG,
92 .base_offset = CORE_UDF_0_B_0_8_PORT_0,
96 /* End of L2, byte offset 24, dst IP[0:15] */
98 /* End of L2, byte offset 26, dst IP[16:31] */
100 /* End of L2, byte offset 28, dst IP[32:47] */
102 /* End of L2, byte offset 30, dst IP[48:63] */
104 /* End of L2, byte offset 32, dst IP[64:79] */
106 /* End of L2, byte offset 34, dst IP[80:95] */
108 /* End of L2, byte offset 36, dst IP[96:111] */
110 /* End of L2, byte offset 38, dst IP[112:127] */
112 /* End of L3, byte offset 2, dst port */
115 .mask_value = L3_FRAMING_MASK | IPPROTO_MASK | IP_FRAG,
116 .base_offset = CORE_UDF_0_D_0_11_PORT_0,
121 static inline unsigned int bcm_sf2_get_num_udf_slices(const u8 *layout)
123 unsigned int i, count = 0;
125 for (i = 0; i < UDFS_PER_SLICE; i++) {
133 static inline u32 udf_upper_bits(unsigned int num_udf)
135 return GENMASK(num_udf - 1, 0) >> (UDFS_PER_SLICE - 1);
138 static inline u32 udf_lower_bits(unsigned int num_udf)
140 return (u8)GENMASK(num_udf - 1, 0);
143 static unsigned int bcm_sf2_get_slice_number(const struct cfp_udf_layout *l,
146 const struct cfp_udf_slice_layout *slice_layout;
147 unsigned int slice_idx;
149 for (slice_idx = start; slice_idx < UDF_NUM_SLICES; slice_idx++) {
150 slice_layout = &l->udfs[slice_idx];
151 if (memcmp(slice_layout->slices, zero_slice,
159 static void bcm_sf2_cfp_udf_set(struct bcm_sf2_priv *priv,
160 const struct cfp_udf_layout *layout,
161 unsigned int slice_num)
163 u32 offset = layout->udfs[slice_num].base_offset;
166 for (i = 0; i < UDFS_PER_SLICE; i++)
167 core_writel(priv, layout->udfs[slice_num].slices[i],
171 static int bcm_sf2_cfp_op(struct bcm_sf2_priv *priv, unsigned int op)
173 unsigned int timeout = 1000;
176 reg = core_readl(priv, CORE_CFP_ACC);
177 reg &= ~(OP_SEL_MASK | RAM_SEL_MASK);
178 reg |= OP_STR_DONE | op;
179 core_writel(priv, reg, CORE_CFP_ACC);
182 reg = core_readl(priv, CORE_CFP_ACC);
183 if (!(reg & OP_STR_DONE))
195 static inline void bcm_sf2_cfp_rule_addr_set(struct bcm_sf2_priv *priv,
200 WARN_ON(addr >= priv->num_cfp_rules);
202 reg = core_readl(priv, CORE_CFP_ACC);
203 reg &= ~(XCESS_ADDR_MASK << XCESS_ADDR_SHIFT);
204 reg |= addr << XCESS_ADDR_SHIFT;
205 core_writel(priv, reg, CORE_CFP_ACC);
208 static inline unsigned int bcm_sf2_cfp_rule_size(struct bcm_sf2_priv *priv)
210 /* Entry #0 is reserved */
211 return priv->num_cfp_rules - 1;
214 static int bcm_sf2_cfp_act_pol_set(struct bcm_sf2_priv *priv,
215 unsigned int rule_index,
217 unsigned int port_num,
218 unsigned int queue_num,
224 /* Replace ARL derived destination with DST_MAP derived, define
225 * which port and queue this should be forwarded to.
228 reg = CHANGE_FWRD_MAP_IB_REP_ARL |
229 BIT(port_num + DST_MAP_IB_SHIFT) |
230 CHANGE_TC | queue_num << NEW_TC_SHIFT;
234 /* Enable looping back to the original port */
235 if (src_port == port_num)
238 core_writel(priv, reg, CORE_ACT_POL_DATA0);
240 /* Set classification ID that needs to be put in Broadcom tag */
241 core_writel(priv, rule_index << CHAIN_ID_SHIFT, CORE_ACT_POL_DATA1);
243 core_writel(priv, 0, CORE_ACT_POL_DATA2);
245 /* Configure policer RAM now */
246 ret = bcm_sf2_cfp_op(priv, OP_SEL_WRITE | ACT_POL_RAM);
248 pr_err("Policer entry at %d failed\n", rule_index);
252 /* Disable the policer */
253 core_writel(priv, POLICER_MODE_DISABLE, CORE_RATE_METER0);
255 /* Now the rate meter */
256 ret = bcm_sf2_cfp_op(priv, OP_SEL_WRITE | RATE_METER_RAM);
258 pr_err("Meter entry at %d failed\n", rule_index);
265 static void bcm_sf2_cfp_slice_ipv4(struct bcm_sf2_priv *priv,
266 struct flow_dissector_key_ipv4_addrs *addrs,
267 struct flow_dissector_key_ports *ports,
268 unsigned int slice_num,
279 offset = CORE_CFP_MASK_PORT(4);
281 offset = CORE_CFP_DATA_PORT(4);
282 core_writel(priv, reg, offset);
288 reg = be16_to_cpu(ports->dst) >> 8;
290 offset = CORE_CFP_MASK_PORT(3);
292 offset = CORE_CFP_DATA_PORT(3);
293 core_writel(priv, reg, offset);
299 reg = (be16_to_cpu(ports->dst) & 0xff) << 24 |
300 (u32)be16_to_cpu(ports->src) << 8 |
301 (be32_to_cpu(addrs->dst) & 0x0000ff00) >> 8;
303 offset = CORE_CFP_MASK_PORT(2);
305 offset = CORE_CFP_DATA_PORT(2);
306 core_writel(priv, reg, offset);
312 reg = (u32)(be32_to_cpu(addrs->dst) & 0xff) << 24 |
313 (u32)(be32_to_cpu(addrs->dst) >> 16) << 8 |
314 (be32_to_cpu(addrs->src) & 0x0000ff00) >> 8;
316 offset = CORE_CFP_MASK_PORT(1);
318 offset = CORE_CFP_DATA_PORT(1);
319 core_writel(priv, reg, offset);
327 reg = (u32)(be32_to_cpu(addrs->src) & 0xff) << 24 |
328 (u32)(be32_to_cpu(addrs->src) >> 16) << 8 |
329 SLICE_NUM(slice_num) | SLICE_VALID;
331 offset = CORE_CFP_MASK_PORT(0);
333 offset = CORE_CFP_DATA_PORT(0);
334 core_writel(priv, reg, offset);
337 static int bcm_sf2_cfp_ipv4_rule_set(struct bcm_sf2_priv *priv, int port,
338 unsigned int port_num,
339 unsigned int queue_num,
340 struct ethtool_rx_flow_spec *fs)
342 struct ethtool_rx_flow_spec_input input = {};
343 const struct cfp_udf_layout *layout;
344 unsigned int slice_num, rule_index;
345 struct ethtool_rx_flow_rule *flow;
346 struct flow_match_ipv4_addrs ipv4;
347 struct flow_match_ports ports;
348 struct flow_match_ip ip;
349 u8 ip_proto, ip_frag;
354 switch (fs->flow_type & ~FLOW_EXT) {
356 ip_proto = IPPROTO_TCP;
359 ip_proto = IPPROTO_UDP;
365 ip_frag = be32_to_cpu(fs->m_ext.data[0]);
367 /* Locate the first rule available */
368 if (fs->location == RX_CLS_LOC_ANY)
369 rule_index = find_first_zero_bit(priv->cfp.used,
370 priv->num_cfp_rules);
372 rule_index = fs->location;
374 if (rule_index > bcm_sf2_cfp_rule_size(priv))
378 flow = ethtool_rx_flow_rule_create(&input);
380 return PTR_ERR(flow);
382 flow_rule_match_ipv4_addrs(flow->rule, &ipv4);
383 flow_rule_match_ports(flow->rule, &ports);
384 flow_rule_match_ip(flow->rule, &ip);
386 layout = &udf_tcpip4_layout;
387 /* We only use one UDF slice for now */
388 slice_num = bcm_sf2_get_slice_number(layout, 0);
389 if (slice_num == UDF_NUM_SLICES) {
391 goto out_err_flow_rule;
394 num_udf = bcm_sf2_get_num_udf_slices(layout->udfs[slice_num].slices);
396 /* Apply the UDF layout for this filter */
397 bcm_sf2_cfp_udf_set(priv, layout, slice_num);
399 /* Apply to all packets received through this port */
400 core_writel(priv, BIT(port), CORE_CFP_DATA_PORT(7));
402 /* Source port map match */
403 core_writel(priv, 0xff, CORE_CFP_MASK_PORT(7));
405 /* S-Tag status [31:30]
406 * C-Tag status [29:28]
419 core_writel(priv, ip.key->tos << IPTOS_SHIFT |
420 ip_proto << IPPROTO_SHIFT | ip_frag << IP_FRAG_SHIFT |
421 udf_upper_bits(num_udf),
422 CORE_CFP_DATA_PORT(6));
424 /* Mask with the specific layout for IPv4 packets */
425 core_writel(priv, layout->udfs[slice_num].mask_value |
426 udf_upper_bits(num_udf), CORE_CFP_MASK_PORT(6));
428 /* UDF_Valid[7:0] [31:24]
432 core_writel(priv, udf_lower_bits(num_udf) << 24, CORE_CFP_DATA_PORT(5));
434 /* Mask all but valid UDFs */
435 core_writel(priv, udf_lower_bits(num_udf) << 24, CORE_CFP_MASK_PORT(5));
437 /* Program the match and the mask */
438 bcm_sf2_cfp_slice_ipv4(priv, ipv4.key, ports.key, slice_num, false);
439 bcm_sf2_cfp_slice_ipv4(priv, ipv4.mask, ports.mask, SLICE_NUM_MASK, true);
441 /* Insert into TCAM now */
442 bcm_sf2_cfp_rule_addr_set(priv, rule_index);
444 ret = bcm_sf2_cfp_op(priv, OP_SEL_WRITE | TCAM_SEL);
446 pr_err("TCAM entry at addr %d failed\n", rule_index);
447 goto out_err_flow_rule;
450 /* Insert into Action and policer RAMs now */
451 ret = bcm_sf2_cfp_act_pol_set(priv, rule_index, port, port_num,
454 goto out_err_flow_rule;
456 /* Turn on CFP for this rule now */
457 reg = core_readl(priv, CORE_CFP_CTL_REG);
459 core_writel(priv, reg, CORE_CFP_CTL_REG);
461 /* Flag the rule as being used and return it */
462 set_bit(rule_index, priv->cfp.used);
463 set_bit(rule_index, priv->cfp.unique);
464 fs->location = rule_index;
469 ethtool_rx_flow_rule_destroy(flow);
473 static void bcm_sf2_cfp_slice_ipv6(struct bcm_sf2_priv *priv,
474 const __be32 *ip6_addr, const __be16 port,
475 unsigned int slice_num,
478 u32 reg, tmp, val, offset;
481 * UDF_n_B8 [23:8] (port)
482 * UDF_n_B7 (upper) [7:0] (addr[15:8])
484 reg = be32_to_cpu(ip6_addr[3]);
485 val = (u32)be16_to_cpu(port) << 8 | ((reg >> 8) & 0xff);
487 offset = CORE_CFP_MASK_PORT(4);
489 offset = CORE_CFP_DATA_PORT(4);
490 core_writel(priv, val, offset);
492 /* UDF_n_B7 (lower) [31:24] (addr[7:0])
493 * UDF_n_B6 [23:8] (addr[31:16])
494 * UDF_n_B5 (upper) [7:0] (addr[47:40])
496 tmp = be32_to_cpu(ip6_addr[2]);
497 val = (u32)(reg & 0xff) << 24 | (u32)(reg >> 16) << 8 |
500 offset = CORE_CFP_MASK_PORT(3);
502 offset = CORE_CFP_DATA_PORT(3);
503 core_writel(priv, val, offset);
505 /* UDF_n_B5 (lower) [31:24] (addr[39:32])
506 * UDF_n_B4 [23:8] (addr[63:48])
507 * UDF_n_B3 (upper) [7:0] (addr[79:72])
509 reg = be32_to_cpu(ip6_addr[1]);
510 val = (u32)(tmp & 0xff) << 24 | (u32)(tmp >> 16) << 8 |
513 offset = CORE_CFP_MASK_PORT(2);
515 offset = CORE_CFP_DATA_PORT(2);
516 core_writel(priv, val, offset);
518 /* UDF_n_B3 (lower) [31:24] (addr[71:64])
519 * UDF_n_B2 [23:8] (addr[95:80])
520 * UDF_n_B1 (upper) [7:0] (addr[111:104])
522 tmp = be32_to_cpu(ip6_addr[0]);
523 val = (u32)(reg & 0xff) << 24 | (u32)(reg >> 16) << 8 |
526 offset = CORE_CFP_MASK_PORT(1);
528 offset = CORE_CFP_DATA_PORT(1);
529 core_writel(priv, val, offset);
531 /* UDF_n_B1 (lower) [31:24] (addr[103:96])
532 * UDF_n_B0 [23:8] (addr[127:112])
537 reg = (u32)(tmp & 0xff) << 24 | (u32)(tmp >> 16) << 8 |
538 SLICE_NUM(slice_num) | SLICE_VALID;
540 offset = CORE_CFP_MASK_PORT(0);
542 offset = CORE_CFP_DATA_PORT(0);
543 core_writel(priv, reg, offset);
546 static struct cfp_rule *bcm_sf2_cfp_rule_find(struct bcm_sf2_priv *priv,
547 int port, u32 location)
549 struct cfp_rule *rule = NULL;
551 list_for_each_entry(rule, &priv->cfp.rules_list, next) {
552 if (rule->port == port && rule->fs.location == location)
559 static int bcm_sf2_cfp_rule_cmp(struct bcm_sf2_priv *priv, int port,
560 struct ethtool_rx_flow_spec *fs)
562 struct cfp_rule *rule = NULL;
566 if (list_empty(&priv->cfp.rules_list))
569 list_for_each_entry(rule, &priv->cfp.rules_list, next) {
571 if (rule->port != port)
574 if (rule->fs.flow_type != fs->flow_type ||
575 rule->fs.ring_cookie != fs->ring_cookie ||
576 rule->fs.m_ext.data[0] != fs->m_ext.data[0])
579 switch (fs->flow_type & ~FLOW_EXT) {
582 fs_size = sizeof(struct ethtool_tcpip6_spec);
586 fs_size = sizeof(struct ethtool_tcpip4_spec);
592 ret = memcmp(&rule->fs.h_u, &fs->h_u, fs_size);
593 ret |= memcmp(&rule->fs.m_u, &fs->m_u, fs_size);
601 static int bcm_sf2_cfp_ipv6_rule_set(struct bcm_sf2_priv *priv, int port,
602 unsigned int port_num,
603 unsigned int queue_num,
604 struct ethtool_rx_flow_spec *fs)
606 struct ethtool_rx_flow_spec_input input = {};
607 unsigned int slice_num, rule_index[2];
608 const struct cfp_udf_layout *layout;
609 struct ethtool_rx_flow_rule *flow;
610 struct flow_match_ipv6_addrs ipv6;
611 struct flow_match_ports ports;
612 u8 ip_proto, ip_frag;
617 switch (fs->flow_type & ~FLOW_EXT) {
619 ip_proto = IPPROTO_TCP;
622 ip_proto = IPPROTO_UDP;
628 ip_frag = be32_to_cpu(fs->m_ext.data[0]);
630 layout = &udf_tcpip6_layout;
631 slice_num = bcm_sf2_get_slice_number(layout, 0);
632 if (slice_num == UDF_NUM_SLICES)
635 num_udf = bcm_sf2_get_num_udf_slices(layout->udfs[slice_num].slices);
637 /* Negotiate two indexes, one for the second half which we are chained
638 * from, which is what we will return to user-space, and a second one
639 * which is used to store its first half. That first half does not
640 * allow any choice of placement, so it just needs to find the next
641 * available bit. We return the second half as fs->location because
642 * that helps with the rule lookup later on since the second half is
643 * chained from its first half, we can easily identify IPv6 CFP rules
644 * by looking whether they carry a CHAIN_ID.
646 * We also want the second half to have a lower rule_index than its
647 * first half because the HW search is by incrementing addresses.
649 if (fs->location == RX_CLS_LOC_ANY)
650 rule_index[1] = find_first_zero_bit(priv->cfp.used,
651 priv->num_cfp_rules);
653 rule_index[1] = fs->location;
654 if (rule_index[1] > bcm_sf2_cfp_rule_size(priv))
657 /* Flag it as used (cleared on error path) such that we can immediately
658 * obtain a second one to chain from.
660 set_bit(rule_index[1], priv->cfp.used);
662 rule_index[0] = find_first_zero_bit(priv->cfp.used,
663 priv->num_cfp_rules);
664 if (rule_index[0] > bcm_sf2_cfp_rule_size(priv)) {
670 flow = ethtool_rx_flow_rule_create(&input);
675 flow_rule_match_ipv6_addrs(flow->rule, &ipv6);
676 flow_rule_match_ports(flow->rule, &ports);
678 /* Apply the UDF layout for this filter */
679 bcm_sf2_cfp_udf_set(priv, layout, slice_num);
681 /* Apply to all packets received through this port */
682 core_writel(priv, BIT(port), CORE_CFP_DATA_PORT(7));
684 /* Source port map match */
685 core_writel(priv, 0xff, CORE_CFP_MASK_PORT(7));
687 /* S-Tag status [31:30]
688 * C-Tag status [29:28]
701 reg = 1 << L3_FRAMING_SHIFT | ip_proto << IPPROTO_SHIFT |
702 ip_frag << IP_FRAG_SHIFT | udf_upper_bits(num_udf);
703 core_writel(priv, reg, CORE_CFP_DATA_PORT(6));
705 /* Mask with the specific layout for IPv6 packets including
708 reg = layout->udfs[slice_num].mask_value | udf_upper_bits(num_udf);
709 core_writel(priv, reg, CORE_CFP_MASK_PORT(6));
711 /* UDF_Valid[7:0] [31:24]
715 core_writel(priv, udf_lower_bits(num_udf) << 24, CORE_CFP_DATA_PORT(5));
717 /* Mask all but valid UDFs */
718 core_writel(priv, udf_lower_bits(num_udf) << 24, CORE_CFP_MASK_PORT(5));
720 /* Slice the IPv6 source address and port */
721 bcm_sf2_cfp_slice_ipv6(priv, ipv6.key->src.in6_u.u6_addr32,
722 ports.key->src, slice_num, false);
723 bcm_sf2_cfp_slice_ipv6(priv, ipv6.mask->src.in6_u.u6_addr32,
724 ports.mask->src, SLICE_NUM_MASK, true);
726 /* Insert into TCAM now because we need to insert a second rule */
727 bcm_sf2_cfp_rule_addr_set(priv, rule_index[0]);
729 ret = bcm_sf2_cfp_op(priv, OP_SEL_WRITE | TCAM_SEL);
731 pr_err("TCAM entry at addr %d failed\n", rule_index[0]);
732 goto out_err_flow_rule;
735 /* Insert into Action and policer RAMs now */
736 ret = bcm_sf2_cfp_act_pol_set(priv, rule_index[0], port, port_num,
739 goto out_err_flow_rule;
741 /* Now deal with the second slice to chain this rule */
742 slice_num = bcm_sf2_get_slice_number(layout, slice_num + 1);
743 if (slice_num == UDF_NUM_SLICES) {
745 goto out_err_flow_rule;
748 num_udf = bcm_sf2_get_num_udf_slices(layout->udfs[slice_num].slices);
750 /* Apply the UDF layout for this filter */
751 bcm_sf2_cfp_udf_set(priv, layout, slice_num);
753 /* Chained rule, source port match is coming from the rule we are
756 core_writel(priv, 0, CORE_CFP_DATA_PORT(7));
757 core_writel(priv, 0, CORE_CFP_MASK_PORT(7));
760 * CHAIN ID [31:24] chain to previous slice
762 * UDF_Valid[11:8] [19:16]
763 * UDF_Valid[7:0] [15:8]
766 reg = rule_index[0] << 24 | udf_upper_bits(num_udf) << 16 |
767 udf_lower_bits(num_udf) << 8;
768 core_writel(priv, reg, CORE_CFP_DATA_PORT(6));
770 /* Mask all except chain ID, UDF Valid[8] and UDF Valid[7:0] */
771 reg = XCESS_ADDR_MASK << 24 | udf_upper_bits(num_udf) << 16 |
772 udf_lower_bits(num_udf) << 8;
773 core_writel(priv, reg, CORE_CFP_MASK_PORT(6));
776 core_writel(priv, 0, CORE_CFP_DATA_PORT(5));
779 core_writel(priv, 0, CORE_CFP_MASK_PORT(5));
781 bcm_sf2_cfp_slice_ipv6(priv, ipv6.key->dst.in6_u.u6_addr32,
782 ports.key->dst, slice_num, false);
783 bcm_sf2_cfp_slice_ipv6(priv, ipv6.mask->dst.in6_u.u6_addr32,
784 ports.key->dst, SLICE_NUM_MASK, true);
786 /* Insert into TCAM now */
787 bcm_sf2_cfp_rule_addr_set(priv, rule_index[1]);
789 ret = bcm_sf2_cfp_op(priv, OP_SEL_WRITE | TCAM_SEL);
791 pr_err("TCAM entry at addr %d failed\n", rule_index[1]);
792 goto out_err_flow_rule;
795 /* Insert into Action and policer RAMs now, set chain ID to
796 * the one we are chained to
798 ret = bcm_sf2_cfp_act_pol_set(priv, rule_index[1], port, port_num,
801 goto out_err_flow_rule;
803 /* Turn on CFP for this rule now */
804 reg = core_readl(priv, CORE_CFP_CTL_REG);
806 core_writel(priv, reg, CORE_CFP_CTL_REG);
808 /* Flag the second half rule as being used now, return it as the
809 * location, and flag it as unique while dumping rules
811 set_bit(rule_index[0], priv->cfp.used);
812 set_bit(rule_index[1], priv->cfp.unique);
813 fs->location = rule_index[1];
818 ethtool_rx_flow_rule_destroy(flow);
820 clear_bit(rule_index[1], priv->cfp.used);
824 static int bcm_sf2_cfp_rule_insert(struct dsa_switch *ds, int port,
825 struct ethtool_rx_flow_spec *fs)
827 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
828 s8 cpu_port = ds->ports[port].cpu_dp->index;
829 __u64 ring_cookie = fs->ring_cookie;
830 unsigned int queue_num, port_num;
833 /* This rule is a Wake-on-LAN filter and we must specifically
834 * target the CPU port in order for it to be working.
836 if (ring_cookie == RX_CLS_FLOW_WAKE)
837 ring_cookie = cpu_port * SF2_NUM_EGRESS_QUEUES;
839 /* We do not support discarding packets, check that the
840 * destination port is enabled and that we are within the
841 * number of ports supported by the switch
843 port_num = ring_cookie / SF2_NUM_EGRESS_QUEUES;
845 if (ring_cookie == RX_CLS_FLOW_DISC ||
846 !(dsa_is_user_port(ds, port_num) ||
847 dsa_is_cpu_port(ds, port_num)) ||
848 port_num >= priv->hw_params.num_ports)
851 * We have a small oddity where Port 6 just does not have a
852 * valid bit here (so we substract by one).
854 queue_num = ring_cookie % SF2_NUM_EGRESS_QUEUES;
858 switch (fs->flow_type & ~FLOW_EXT) {
861 ret = bcm_sf2_cfp_ipv4_rule_set(priv, port, port_num,
866 ret = bcm_sf2_cfp_ipv6_rule_set(priv, port, port_num,
877 static int bcm_sf2_cfp_rule_set(struct dsa_switch *ds, int port,
878 struct ethtool_rx_flow_spec *fs)
880 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
881 struct cfp_rule *rule = NULL;
884 /* Check for unsupported extensions */
885 if ((fs->flow_type & FLOW_EXT) && (fs->m_ext.vlan_etype ||
889 if (fs->location != RX_CLS_LOC_ANY && fs->location >= CFP_NUM_RULES)
892 if (fs->location != RX_CLS_LOC_ANY &&
893 test_bit(fs->location, priv->cfp.used))
896 if (fs->location != RX_CLS_LOC_ANY &&
897 fs->location > bcm_sf2_cfp_rule_size(priv))
900 ret = bcm_sf2_cfp_rule_cmp(priv, port, fs);
904 rule = kzalloc(sizeof(*rule), GFP_KERNEL);
908 ret = bcm_sf2_cfp_rule_insert(ds, port, fs);
915 memcpy(&rule->fs, fs, sizeof(*fs));
916 list_add_tail(&rule->next, &priv->cfp.rules_list);
921 static int bcm_sf2_cfp_rule_del_one(struct bcm_sf2_priv *priv, int port,
922 u32 loc, u32 *next_loc)
927 /* Indicate which rule we want to read */
928 bcm_sf2_cfp_rule_addr_set(priv, loc);
930 ret = bcm_sf2_cfp_op(priv, OP_SEL_READ | TCAM_SEL);
934 /* Check if this is possibly an IPv6 rule that would
935 * indicate we need to delete its companion rule
938 reg = core_readl(priv, CORE_CFP_DATA_PORT(6));
940 *next_loc = (reg >> 24) & CHAIN_ID_MASK;
942 /* Clear its valid bits */
943 reg = core_readl(priv, CORE_CFP_DATA_PORT(0));
945 core_writel(priv, reg, CORE_CFP_DATA_PORT(0));
947 /* Write back this entry into the TCAM now */
948 ret = bcm_sf2_cfp_op(priv, OP_SEL_WRITE | TCAM_SEL);
952 clear_bit(loc, priv->cfp.used);
953 clear_bit(loc, priv->cfp.unique);
958 static int bcm_sf2_cfp_rule_remove(struct bcm_sf2_priv *priv, int port,
964 ret = bcm_sf2_cfp_rule_del_one(priv, port, loc, &next_loc);
968 /* If this was an IPv6 rule, delete is companion rule too */
970 ret = bcm_sf2_cfp_rule_del_one(priv, port, next_loc, NULL);
975 static int bcm_sf2_cfp_rule_del(struct bcm_sf2_priv *priv, int port, u32 loc)
977 struct cfp_rule *rule;
980 if (loc >= CFP_NUM_RULES)
983 /* Refuse deleting unused rules, and those that are not unique since
984 * that could leave IPv6 rules with one of the chained rule in the
987 if (!test_bit(loc, priv->cfp.unique) || loc == 0)
990 rule = bcm_sf2_cfp_rule_find(priv, port, loc);
994 ret = bcm_sf2_cfp_rule_remove(priv, port, loc);
996 list_del(&rule->next);
1002 static void bcm_sf2_invert_masks(struct ethtool_rx_flow_spec *flow)
1006 for (i = 0; i < sizeof(flow->m_u); i++)
1007 flow->m_u.hdata[i] ^= 0xff;
1009 flow->m_ext.vlan_etype ^= cpu_to_be16(~0);
1010 flow->m_ext.vlan_tci ^= cpu_to_be16(~0);
1011 flow->m_ext.data[0] ^= cpu_to_be32(~0);
1012 flow->m_ext.data[1] ^= cpu_to_be32(~0);
1015 static int bcm_sf2_cfp_rule_get(struct bcm_sf2_priv *priv, int port,
1016 struct ethtool_rxnfc *nfc)
1018 struct cfp_rule *rule;
1020 rule = bcm_sf2_cfp_rule_find(priv, port, nfc->fs.location);
1024 memcpy(&nfc->fs, &rule->fs, sizeof(rule->fs));
1026 bcm_sf2_invert_masks(&nfc->fs);
1028 /* Put the TCAM size here */
1029 nfc->data = bcm_sf2_cfp_rule_size(priv);
1034 /* We implement the search doing a TCAM search operation */
1035 static int bcm_sf2_cfp_rule_get_all(struct bcm_sf2_priv *priv,
1036 int port, struct ethtool_rxnfc *nfc,
1039 unsigned int index = 1, rules_cnt = 0;
1041 for_each_set_bit_from(index, priv->cfp.unique, priv->num_cfp_rules) {
1042 rule_locs[rules_cnt] = index;
1046 /* Put the TCAM size here */
1047 nfc->data = bcm_sf2_cfp_rule_size(priv);
1048 nfc->rule_cnt = rules_cnt;
1053 int bcm_sf2_get_rxnfc(struct dsa_switch *ds, int port,
1054 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1056 struct net_device *p = ds->ports[port].cpu_dp->master;
1057 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
1060 mutex_lock(&priv->cfp.lock);
1063 case ETHTOOL_GRXCLSRLCNT:
1064 /* Subtract the default, unusable rule */
1065 nfc->rule_cnt = bitmap_weight(priv->cfp.unique,
1066 priv->num_cfp_rules) - 1;
1067 /* We support specifying rule locations */
1068 nfc->data |= RX_CLS_LOC_SPECIAL;
1070 case ETHTOOL_GRXCLSRULE:
1071 ret = bcm_sf2_cfp_rule_get(priv, port, nfc);
1073 case ETHTOOL_GRXCLSRLALL:
1074 ret = bcm_sf2_cfp_rule_get_all(priv, port, nfc, rule_locs);
1081 mutex_unlock(&priv->cfp.lock);
1086 /* Pass up the commands to the attached master network device */
1087 if (p->ethtool_ops->get_rxnfc) {
1088 ret = p->ethtool_ops->get_rxnfc(p, nfc, rule_locs);
1089 if (ret == -EOPNOTSUPP)
1096 int bcm_sf2_set_rxnfc(struct dsa_switch *ds, int port,
1097 struct ethtool_rxnfc *nfc)
1099 struct net_device *p = ds->ports[port].cpu_dp->master;
1100 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
1103 mutex_lock(&priv->cfp.lock);
1106 case ETHTOOL_SRXCLSRLINS:
1107 ret = bcm_sf2_cfp_rule_set(ds, port, &nfc->fs);
1110 case ETHTOOL_SRXCLSRLDEL:
1111 ret = bcm_sf2_cfp_rule_del(priv, port, nfc->fs.location);
1118 mutex_unlock(&priv->cfp.lock);
1123 /* Pass up the commands to the attached master network device.
1124 * This can fail, so rollback the operation if we need to.
1126 if (p->ethtool_ops->set_rxnfc) {
1127 ret = p->ethtool_ops->set_rxnfc(p, nfc);
1128 if (ret && ret != -EOPNOTSUPP) {
1129 mutex_lock(&priv->cfp.lock);
1130 bcm_sf2_cfp_rule_del(priv, port, nfc->fs.location);
1131 mutex_unlock(&priv->cfp.lock);
1140 int bcm_sf2_cfp_rst(struct bcm_sf2_priv *priv)
1142 unsigned int timeout = 1000;
1145 reg = core_readl(priv, CORE_CFP_ACC);
1147 core_writel(priv, reg, CORE_CFP_ACC);
1150 reg = core_readl(priv, CORE_CFP_ACC);
1151 if (!(reg & TCAM_RESET))
1155 } while (timeout--);
1163 void bcm_sf2_cfp_exit(struct dsa_switch *ds)
1165 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
1166 struct cfp_rule *rule, *n;
1168 if (list_empty(&priv->cfp.rules_list))
1171 list_for_each_entry_safe_reverse(rule, n, &priv->cfp.rules_list, next)
1172 bcm_sf2_cfp_rule_del(priv, rule->port, rule->fs.location);
1175 int bcm_sf2_cfp_resume(struct dsa_switch *ds)
1177 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
1178 struct cfp_rule *rule;
1182 if (list_empty(&priv->cfp.rules_list))
1185 reg = core_readl(priv, CORE_CFP_CTL_REG);
1186 reg &= ~CFP_EN_MAP_MASK;
1187 core_writel(priv, reg, CORE_CFP_CTL_REG);
1189 ret = bcm_sf2_cfp_rst(priv);
1193 list_for_each_entry(rule, &priv->cfp.rules_list, next) {
1194 ret = bcm_sf2_cfp_rule_remove(priv, rule->port,
1197 dev_err(ds->dev, "failed to remove rule\n");
1201 ret = bcm_sf2_cfp_rule_insert(ds, rule->port, &rule->fs);
1203 dev_err(ds->dev, "failed to restore rule\n");
1211 static const struct bcm_sf2_cfp_stat {
1212 unsigned int offset;
1213 unsigned int ram_loc;
1215 } bcm_sf2_cfp_stats[] = {
1217 .offset = CORE_STAT_GREEN_CNTR,
1218 .ram_loc = GREEN_STAT_RAM,
1222 .offset = CORE_STAT_YELLOW_CNTR,
1223 .ram_loc = YELLOW_STAT_RAM,
1227 .offset = CORE_STAT_RED_CNTR,
1228 .ram_loc = RED_STAT_RAM,
1233 void bcm_sf2_cfp_get_strings(struct dsa_switch *ds, int port,
1234 u32 stringset, uint8_t *data)
1236 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
1237 unsigned int s = ARRAY_SIZE(bcm_sf2_cfp_stats);
1238 char buf[ETH_GSTRING_LEN];
1239 unsigned int i, j, iter;
1241 if (stringset != ETH_SS_STATS)
1244 for (i = 1; i < priv->num_cfp_rules; i++) {
1245 for (j = 0; j < s; j++) {
1246 snprintf(buf, sizeof(buf),
1248 i, bcm_sf2_cfp_stats[j].name);
1249 iter = (i - 1) * s + j;
1250 strlcpy(data + iter * ETH_GSTRING_LEN,
1251 buf, ETH_GSTRING_LEN);
1256 void bcm_sf2_cfp_get_ethtool_stats(struct dsa_switch *ds, int port,
1259 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
1260 unsigned int s = ARRAY_SIZE(bcm_sf2_cfp_stats);
1261 const struct bcm_sf2_cfp_stat *stat;
1262 unsigned int i, j, iter;
1263 struct cfp_rule *rule;
1266 mutex_lock(&priv->cfp.lock);
1267 for (i = 1; i < priv->num_cfp_rules; i++) {
1268 rule = bcm_sf2_cfp_rule_find(priv, port, i);
1272 for (j = 0; j < s; j++) {
1273 stat = &bcm_sf2_cfp_stats[j];
1275 bcm_sf2_cfp_rule_addr_set(priv, i);
1276 ret = bcm_sf2_cfp_op(priv, stat->ram_loc | OP_SEL_READ);
1280 iter = (i - 1) * s + j;
1281 data[iter] = core_readl(priv, stat->offset);
1285 mutex_unlock(&priv->cfp.lock);
1288 int bcm_sf2_cfp_get_sset_count(struct dsa_switch *ds, int port, int sset)
1290 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
1292 if (sset != ETH_SS_STATS)
1295 /* 3 counters per CFP rules */
1296 return (priv->num_cfp_rules - 1) * ARRAY_SIZE(bcm_sf2_cfp_stats);