diff options
Diffstat (limited to 'drivers/net/ethernet/mscc/ocelot_vcap.c')
| -rw-r--r-- | drivers/net/ethernet/mscc/ocelot_vcap.c | 1000 |
1 files changed, 1000 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mscc/ocelot_vcap.c b/drivers/net/ethernet/mscc/ocelot_vcap.c new file mode 100644 index 000000000000..3ef620faf995 --- /dev/null +++ b/drivers/net/ethernet/mscc/ocelot_vcap.c @@ -0,0 +1,1000 @@ +// SPDX-License-Identifier: (GPL-2.0 OR MIT) +/* Microsemi Ocelot Switch driver + * Copyright (c) 2019 Microsemi Corporation + */ + +#include <linux/iopoll.h> +#include <linux/proc_fs.h> + +#include <soc/mscc/ocelot_vcap.h> +#include "ocelot_police.h" +#include "ocelot_vcap.h" +#include "ocelot_s2.h" + +#define OCELOT_POLICER_DISCARD 0x17f +#define ENTRY_WIDTH 32 + +enum vcap_sel { + VCAP_SEL_ENTRY = 0x1, + VCAP_SEL_ACTION = 0x2, + VCAP_SEL_COUNTER = 0x4, + VCAP_SEL_ALL = 0x7, +}; + +enum vcap_cmd { + VCAP_CMD_WRITE = 0, /* Copy from Cache to TCAM */ + VCAP_CMD_READ = 1, /* Copy from TCAM to Cache */ + VCAP_CMD_MOVE_UP = 2, /* Move <count> up */ + VCAP_CMD_MOVE_DOWN = 3, /* Move <count> down */ + VCAP_CMD_INITIALIZE = 4, /* Write all (from cache) */ +}; + +#define VCAP_ENTRY_WIDTH 12 /* Max entry width (32bit words) */ +#define VCAP_COUNTER_WIDTH 4 /* Max counter width (32bit words) */ + +struct vcap_data { + u32 entry[VCAP_ENTRY_WIDTH]; /* ENTRY_DAT */ + u32 mask[VCAP_ENTRY_WIDTH]; /* MASK_DAT */ + u32 action[VCAP_ENTRY_WIDTH]; /* ACTION_DAT */ + u32 counter[VCAP_COUNTER_WIDTH]; /* CNT_DAT */ + u32 tg; /* TG_DAT */ + u32 type; /* Action type */ + u32 tg_sw; /* Current type-group */ + u32 cnt; /* Current counter */ + u32 key_offset; /* Current entry offset */ + u32 action_offset; /* Current action offset */ + u32 counter_offset; /* Current counter offset */ + u32 tg_value; /* Current type-group value */ + u32 tg_mask; /* Current type-group mask */ +}; + +static u32 vcap_s2_read_update_ctrl(struct ocelot *ocelot) +{ + return ocelot_read(ocelot, S2_CORE_UPDATE_CTRL); +} + +static void vcap_cmd(struct ocelot *ocelot, u16 ix, int cmd, int sel) +{ + const struct vcap_props *vcap_is2 = &ocelot->vcap[VCAP_IS2]; + + u32 value = (S2_CORE_UPDATE_CTRL_UPDATE_CMD(cmd) | + S2_CORE_UPDATE_CTRL_UPDATE_ADDR(ix) | + S2_CORE_UPDATE_CTRL_UPDATE_SHOT); + + if ((sel & VCAP_SEL_ENTRY) && ix >= vcap_is2->entry_count) + return; + + if (!(sel & VCAP_SEL_ENTRY)) + value |= S2_CORE_UPDATE_CTRL_UPDATE_ENTRY_DIS; + + if (!(sel & VCAP_SEL_ACTION)) + value |= S2_CORE_UPDATE_CTRL_UPDATE_ACTION_DIS; + + if (!(sel & VCAP_SEL_COUNTER)) + value |= S2_CORE_UPDATE_CTRL_UPDATE_CNT_DIS; + + ocelot_write(ocelot, value, S2_CORE_UPDATE_CTRL); + readx_poll_timeout(vcap_s2_read_update_ctrl, ocelot, value, + (value & S2_CORE_UPDATE_CTRL_UPDATE_SHOT) == 0, + 10, 100000); +} + +/* Convert from 0-based row to VCAP entry row and run command */ +static void vcap_row_cmd(struct ocelot *ocelot, u32 row, int cmd, int sel) +{ + const struct vcap_props *vcap_is2 = &ocelot->vcap[VCAP_IS2]; + + vcap_cmd(ocelot, vcap_is2->entry_count - row - 1, cmd, sel); +} + +static void vcap_entry2cache(struct ocelot *ocelot, struct vcap_data *data) +{ + const struct vcap_props *vcap_is2 = &ocelot->vcap[VCAP_IS2]; + u32 entry_words, i; + + entry_words = DIV_ROUND_UP(vcap_is2->entry_width, ENTRY_WIDTH); + + for (i = 0; i < entry_words; i++) { + ocelot_write_rix(ocelot, data->entry[i], S2_CACHE_ENTRY_DAT, i); + ocelot_write_rix(ocelot, ~data->mask[i], S2_CACHE_MASK_DAT, i); + } + ocelot_write(ocelot, data->tg, S2_CACHE_TG_DAT); +} + +static void vcap_cache2entry(struct ocelot *ocelot, struct vcap_data *data) +{ + const struct vcap_props *vcap_is2 = &ocelot->vcap[VCAP_IS2]; + u32 entry_words, i; + + entry_words = DIV_ROUND_UP(vcap_is2->entry_width, ENTRY_WIDTH); + + for (i = 0; i < entry_words; i++) { + data->entry[i] = ocelot_read_rix(ocelot, S2_CACHE_ENTRY_DAT, i); + // Invert mask + data->mask[i] = ~ocelot_read_rix(ocelot, S2_CACHE_MASK_DAT, i); + } + data->tg = ocelot_read(ocelot, S2_CACHE_TG_DAT); +} + +static void vcap_action2cache(struct ocelot *ocelot, struct vcap_data *data) +{ + const struct vcap_props *vcap_is2 = &ocelot->vcap[VCAP_IS2]; + u32 action_words, mask; + int i, width; + + /* Encode action type */ + width = vcap_is2->action_type_width; + if (width) { + mask = GENMASK(width, 0); + data->action[0] = ((data->action[0] & ~mask) | data->type); + } + + action_words = DIV_ROUND_UP(vcap_is2->action_width, ENTRY_WIDTH); + + for (i = 0; i < action_words; i++) + ocelot_write_rix(ocelot, data->action[i], S2_CACHE_ACTION_DAT, + i); + + for (i = 0; i < vcap_is2->counter_words; i++) + ocelot_write_rix(ocelot, data->counter[i], S2_CACHE_CNT_DAT, i); +} + +static void vcap_cache2action(struct ocelot *ocelot, struct vcap_data *data) +{ + const struct vcap_props *vcap_is2 = &ocelot->vcap[VCAP_IS2]; + u32 action_words; + int i, width; + + action_words = DIV_ROUND_UP(vcap_is2->action_width, ENTRY_WIDTH); + + for (i = 0; i < action_words; i++) + data->action[i] = ocelot_read_rix(ocelot, S2_CACHE_ACTION_DAT, + i); + + for (i = 0; i < vcap_is2->counter_words; i++) + data->counter[i] = ocelot_read_rix(ocelot, S2_CACHE_CNT_DAT, i); + + /* Extract action type */ + width = vcap_is2->action_type_width; + data->type = (width ? (data->action[0] & GENMASK(width, 0)) : 0); +} + +/* Calculate offsets for entry */ +static void is2_data_get(struct ocelot *ocelot, struct vcap_data *data, int ix) +{ + const struct vcap_props *vcap_is2 = &ocelot->vcap[VCAP_IS2]; + int i, col, offset, count, cnt, base; + int width = vcap_is2->tg_width; + + count = (data->tg_sw == VCAP_TG_HALF ? 2 : 4); + col = (ix % 2); + cnt = (vcap_is2->sw_count / count); + base = (vcap_is2->sw_count - col * cnt - cnt); + data->tg_value = 0; + data->tg_mask = 0; + for (i = 0; i < cnt; i++) { + offset = ((base + i) * width); + data->tg_value |= (data->tg_sw << offset); + data->tg_mask |= GENMASK(offset + width - 1, offset); + } + + /* Calculate key/action/counter offsets */ + col = (count - col - 1); + data->key_offset = (base * vcap_is2->entry_width) / vcap_is2->sw_count; + data->counter_offset = (cnt * col * vcap_is2->counter_width); + i = data->type; + width = vcap_is2->action_table[i].width; + cnt = vcap_is2->action_table[i].count; + data->action_offset = + (((cnt * col * width) / count) + vcap_is2->action_type_width); +} + +static void vcap_data_set(u32 *data, u32 offset, u32 len, u32 value) +{ + u32 i, v, m; + + for (i = 0; i < len; i++, offset++) { + v = data[offset / ENTRY_WIDTH]; + m = (1 << (offset % ENTRY_WIDTH)); + if (value & (1 << i)) + v |= m; + else + v &= ~m; + data[offset / ENTRY_WIDTH] = v; + } +} + +static u32 vcap_data_get(u32 *data, u32 offset, u32 len) +{ + u32 i, v, m, value = 0; + + for (i = 0; i < len; i++, offset++) { + v = data[offset / ENTRY_WIDTH]; + m = (1 << (offset % ENTRY_WIDTH)); + if (v & m) + value |= (1 << i); + } + return value; +} + +static void vcap_key_field_set(struct vcap_data *data, u32 offset, u32 width, + u32 value, u32 mask) +{ + vcap_data_set(data->entry, offset + data->key_offset, width, value); + vcap_data_set(data->mask, offset + data->key_offset, width, mask); +} + +static void vcap_key_set(struct ocelot *ocelot, struct vcap_data *data, + enum vcap_is2_half_key_field field, + u32 value, u32 mask) +{ + u32 offset = ocelot->vcap_is2_keys[field].offset; + u32 length = ocelot->vcap_is2_keys[field].length; + + vcap_key_field_set(data, offset, length, value, mask); +} + +static void vcap_key_bytes_set(struct ocelot *ocelot, struct vcap_data *data, + enum vcap_is2_half_key_field field, + u8 *val, u8 *msk) +{ + u32 offset = ocelot->vcap_is2_keys[field].offset; + u32 count = ocelot->vcap_is2_keys[field].length; + u32 i, j, n = 0, value = 0, mask = 0; + + WARN_ON(count % 8); + + /* Data wider than 32 bits are split up in chunks of maximum 32 bits. + * The 32 LSB of the data are written to the 32 MSB of the TCAM. + */ + offset += count; + count /= 8; + + for (i = 0; i < count; i++) { + j = (count - i - 1); + value += (val[j] << n); + mask += (msk[j] << n); + n += 8; + if (n == ENTRY_WIDTH || (i + 1) == count) { + offset -= n; + vcap_key_field_set(data, offset, n, value, mask); + n = 0; + value = 0; + mask = 0; + } + } +} + +static void vcap_key_l4_port_set(struct ocelot *ocelot, struct vcap_data *data, + enum vcap_is2_half_key_field field, + struct ocelot_vcap_udp_tcp *port) +{ + u32 offset = ocelot->vcap_is2_keys[field].offset; + u32 length = ocelot->vcap_is2_keys[field].length; + + WARN_ON(length != 16); + + vcap_key_field_set(data, offset, length, port->value, port->mask); +} + +static void vcap_key_bit_set(struct ocelot *ocelot, struct vcap_data *data, + enum vcap_is2_half_key_field field, + enum ocelot_vcap_bit val) +{ + u32 offset = ocelot->vcap_is2_keys[field].offset; + u32 length = ocelot->vcap_is2_keys[field].length; + u32 value = (val == OCELOT_VCAP_BIT_1 ? 1 : 0); + u32 msk = (val == OCELOT_VCAP_BIT_ANY ? 0 : 1); + + WARN_ON(length != 1); + + vcap_key_field_set(data, offset, length, value, msk); +} + +static void vcap_action_set(struct ocelot *ocelot, struct vcap_data *data, + enum vcap_is2_action_field field, u32 value) +{ + int offset = ocelot->vcap_is2_actions[field].offset; + int length = ocelot->vcap_is2_actions[field].length; + + vcap_data_set(data->action, offset + data->action_offset, length, + value); +} + +static void is2_action_set(struct ocelot *ocelot, struct vcap_data *data, + struct ocelot_vcap_filter *filter) +{ + switch (filter->action) { + case OCELOT_VCAP_ACTION_DROP: + vcap_action_set(ocelot, data, VCAP_IS2_ACT_PORT_MASK, 0); + vcap_action_set(ocelot, data, VCAP_IS2_ACT_MASK_MODE, 1); + vcap_action_set(ocelot, data, VCAP_IS2_ACT_POLICE_ENA, 1); + vcap_action_set(ocelot, data, VCAP_IS2_ACT_POLICE_IDX, + OCELOT_POLICER_DISCARD); + vcap_action_set(ocelot, data, VCAP_IS2_ACT_CPU_QU_NUM, 0); + vcap_action_set(ocelot, data, VCAP_IS2_ACT_CPU_COPY_ENA, 0); + break; + case OCELOT_VCAP_ACTION_TRAP: + vcap_action_set(ocelot, data, VCAP_IS2_ACT_PORT_MASK, 0); + vcap_action_set(ocelot, data, VCAP_IS2_ACT_MASK_MODE, 1); + vcap_action_set(ocelot, data, VCAP_IS2_ACT_POLICE_ENA, 0); + vcap_action_set(ocelot, data, VCAP_IS2_ACT_POLICE_IDX, 0); + vcap_action_set(ocelot, data, VCAP_IS2_ACT_CPU_QU_NUM, 0); + vcap_action_set(ocelot, data, VCAP_IS2_ACT_CPU_COPY_ENA, 1); + break; + case OCELOT_VCAP_ACTION_POLICE: + vcap_action_set(ocelot, data, VCAP_IS2_ACT_PORT_MASK, 0); + vcap_action_set(ocelot, data, VCAP_IS2_ACT_MASK_MODE, 0); + vcap_action_set(ocelot, data, VCAP_IS2_ACT_POLICE_ENA, 1); + vcap_action_set(ocelot, data, VCAP_IS2_ACT_POLICE_IDX, + filter->pol_ix); + vcap_action_set(ocelot, data, VCAP_IS2_ACT_CPU_QU_NUM, 0); + vcap_action_set(ocelot, data, VCAP_IS2_ACT_CPU_COPY_ENA, 0); + break; + } +} + +static void is2_entry_set(struct ocelot *ocelot, int ix, + struct ocelot_vcap_filter *filter) +{ + const struct vcap_props *vcap_is2 = &ocelot->vcap[VCAP_IS2]; + struct ocelot_vcap_key_vlan *tag = &filter->vlan; + u32 val, msk, type, type_mask = 0xf, i, count; + struct ocelot_vcap_u64 payload; + struct vcap_data data; + int row = (ix / 2); + + memset(&payload, 0, sizeof(payload)); + memset(&data, 0, sizeof(data)); + + /* Read row */ + vcap_row_cmd(ocelot, row, VCAP_CMD_READ, VCAP_SEL_ALL); + vcap_cache2entry(ocelot, &data); + vcap_cache2action(ocelot, &data); + + data.tg_sw = VCAP_TG_HALF; + is2_data_get(ocelot, &data, ix); + data.tg = (data.tg & ~data.tg_mask); + if (filter->prio != 0) + data.tg |= data.tg_value; + + data.type = IS2_ACTION_TYPE_NORMAL; + + vcap_key_set(ocelot, &data, VCAP_IS2_HK_PAG, 0, 0); + vcap_key_set(ocelot, &data, VCAP_IS2_HK_IGR_PORT_MASK, 0, + ~filter->ingress_port_mask); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_FIRST, OCELOT_VCAP_BIT_1); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_HOST_MATCH, + OCELOT_VCAP_BIT_ANY); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_L2_MC, filter->dmac_mc); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_L2_BC, filter->dmac_bc); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_VLAN_TAGGED, tag->tagged); + vcap_key_set(ocelot, &data, VCAP_IS2_HK_VID, + tag->vid.value, tag->vid.mask); + vcap_key_set(ocelot, &data, VCAP_IS2_HK_PCP, + tag->pcp.value[0], tag->pcp.mask[0]); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_DEI, tag->dei); + + switch (filter->key_type) { + case OCELOT_VCAP_KEY_ETYPE: { + struct ocelot_vcap_key_etype *etype = &filter->key.etype; + + type = IS2_TYPE_ETYPE; + vcap_key_bytes_set(ocelot, &data, VCAP_IS2_HK_L2_DMAC, + etype->dmac.value, etype->dmac.mask); + vcap_key_bytes_set(ocelot, &data, VCAP_IS2_HK_L2_SMAC, + etype->smac.value, etype->smac.mask); + vcap_key_bytes_set(ocelot, &data, VCAP_IS2_HK_MAC_ETYPE_ETYPE, + etype->etype.value, etype->etype.mask); + /* Clear unused bits */ + vcap_key_set(ocelot, &data, VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD0, + 0, 0); + vcap_key_set(ocelot, &data, VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD1, + 0, 0); + vcap_key_set(ocelot, &data, VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD2, + 0, 0); + vcap_key_bytes_set(ocelot, &data, + VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD0, + etype->data.value, etype->data.mask); + break; + } + case OCELOT_VCAP_KEY_LLC: { + struct ocelot_vcap_key_llc *llc = &filter->key.llc; + + type = IS2_TYPE_LLC; + vcap_key_bytes_set(ocelot, &data, VCAP_IS2_HK_L2_DMAC, + llc->dmac.value, llc->dmac.mask); + vcap_key_bytes_set(ocelot, &data, VCAP_IS2_HK_L2_SMAC, + llc->smac.value, llc->smac.mask); + for (i = 0; i < 4; i++) { + payload.value[i] = llc->llc.value[i]; + payload.mask[i] = llc->llc.mask[i]; + } + vcap_key_bytes_set(ocelot, &data, VCAP_IS2_HK_MAC_LLC_L2_LLC, + payload.value, payload.mask); + break; + } + case OCELOT_VCAP_KEY_SNAP: { + struct ocelot_vcap_key_snap *snap = &filter->key.snap; + + type = IS2_TYPE_SNAP; + vcap_key_bytes_set(ocelot, &data, VCAP_IS2_HK_L2_DMAC, + snap->dmac.value, snap->dmac.mask); + vcap_key_bytes_set(ocelot, &data, VCAP_IS2_HK_L2_SMAC, + snap->smac.value, snap->smac.mask); + vcap_key_bytes_set(ocelot, &data, VCAP_IS2_HK_MAC_SNAP_L2_SNAP, + filter->key.snap.snap.value, + filter->key.snap.snap.mask); + break; + } + case OCELOT_VCAP_KEY_ARP: { + struct ocelot_vcap_key_arp *arp = &filter->key.arp; + + type = IS2_TYPE_ARP; + vcap_key_bytes_set(ocelot, &data, VCAP_IS2_HK_MAC_ARP_SMAC, + arp->smac.value, arp->smac.mask); + vcap_key_bit_set(ocelot, &data, + VCAP_IS2_HK_MAC_ARP_ADDR_SPACE_OK, + arp->ethernet); + vcap_key_bit_set(ocelot, &data, + VCAP_IS2_HK_MAC_ARP_PROTO_SPACE_OK, + arp->ip); + vcap_key_bit_set(ocelot, &data, + VCAP_IS2_HK_MAC_ARP_LEN_OK, + arp->length); + vcap_key_bit_set(ocelot, &data, + VCAP_IS2_HK_MAC_ARP_TARGET_MATCH, + arp->dmac_match); + vcap_key_bit_set(ocelot, &data, + VCAP_IS2_HK_MAC_ARP_SENDER_MATCH, + arp->smac_match); + vcap_key_bit_set(ocelot, &data, + VCAP_IS2_HK_MAC_ARP_OPCODE_UNKNOWN, + arp->unknown); + + /* OPCODE is inverse, bit 0 is reply flag, bit 1 is RARP flag */ + val = ((arp->req == OCELOT_VCAP_BIT_0 ? 1 : 0) | + (arp->arp == OCELOT_VCAP_BIT_0 ? 2 : 0)); + msk = ((arp->req == OCELOT_VCAP_BIT_ANY ? 0 : 1) | + (arp->arp == OCELOT_VCAP_BIT_ANY ? 0 : 2)); + vcap_key_set(ocelot, &data, VCAP_IS2_HK_MAC_ARP_OPCODE, + val, msk); + vcap_key_bytes_set(ocelot, &data, + VCAP_IS2_HK_MAC_ARP_L3_IP4_DIP, + arp->dip.value.addr, arp->dip.mask.addr); + vcap_key_bytes_set(ocelot, &data, + VCAP_IS2_HK_MAC_ARP_L3_IP4_SIP, + arp->sip.value.addr, arp->sip.mask.addr); + vcap_key_set(ocelot, &data, VCAP_IS2_HK_MAC_ARP_DIP_EQ_SIP, + 0, 0); + break; + } + case OCELOT_VCAP_KEY_IPV4: + case OCELOT_VCAP_KEY_IPV6: { + enum ocelot_vcap_bit sip_eq_dip, sport_eq_dport, seq_zero, tcp; + enum ocelot_vcap_bit ttl, fragment, options, tcp_ack, tcp_urg; + enum ocelot_vcap_bit tcp_fin, tcp_syn, tcp_rst, tcp_psh; + struct ocelot_vcap_key_ipv4 *ipv4 = NULL; + struct ocelot_vcap_key_ipv6 *ipv6 = NULL; + struct ocelot_vcap_udp_tcp *sport, *dport; + struct ocelot_vcap_ipv4 sip, dip; + struct ocelot_vcap_u8 proto, ds; + struct ocelot_vcap_u48 *ip_data; + + if (filter->key_type == OCELOT_VCAP_KEY_IPV4) { + ipv4 = &filter->key.ipv4; + ttl = ipv4->ttl; + fragment = ipv4->fragment; + options = ipv4->options; + proto = ipv4->proto; + ds = ipv4->ds; + ip_data = &ipv4->data; + sip = ipv4->sip; + dip = ipv4->dip; + sport = &ipv4->sport; + dport = &ipv4->dport; + tcp_fin = ipv4->tcp_fin; + tcp_syn = ipv4->tcp_syn; + tcp_rst = ipv4->tcp_rst; + tcp_psh = ipv4->tcp_psh; + tcp_ack = ipv4->tcp_ack; + tcp_urg = ipv4->tcp_urg; + sip_eq_dip = ipv4->sip_eq_dip; + sport_eq_dport = ipv4->sport_eq_dport; + seq_zero = ipv4->seq_zero; + } else { + ipv6 = &filter->key.ipv6; + ttl = ipv6->ttl; + fragment = OCELOT_VCAP_BIT_ANY; + options = OCELOT_VCAP_BIT_ANY; + proto = ipv6->proto; + ds = ipv6->ds; + ip_data = &ipv6->data; + for (i = 0; i < 8; i++) { + val = ipv6->sip.value[i + 8]; + msk = ipv6->sip.mask[i + 8]; + if (i < 4) { + dip.value.addr[i] = val; + dip.mask.addr[i] = msk; + } else { + sip.value.addr[i - 4] = val; + sip.mask.addr[i - 4] = msk; + } + } + sport = &ipv6->sport; + dport = &ipv6->dport; + tcp_fin = ipv6->tcp_fin; + tcp_syn = ipv6->tcp_syn; + tcp_rst = ipv6->tcp_rst; + tcp_psh = ipv6->tcp_psh; + tcp_ack = ipv6->tcp_ack; + tcp_urg = ipv6->tcp_urg; + sip_eq_dip = ipv6->sip_eq_dip; + sport_eq_dport = ipv6->sport_eq_dport; + seq_zero = ipv6->seq_zero; + } + + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_IP4, + ipv4 ? OCELOT_VCAP_BIT_1 : OCELOT_VCAP_BIT_0); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_L3_FRAGMENT, + fragment); + vcap_key_set(ocelot, &data, VCAP_IS2_HK_L3_FRAG_OFS_GT0, 0, 0); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_L3_OPTIONS, + options); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_IP4_L3_TTL_GT0, + ttl); + vcap_key_bytes_set(ocelot, &data, VCAP_IS2_HK_L3_TOS, + ds.value, ds.mask); + vcap_key_bytes_set(ocelot, &data, VCAP_IS2_HK_L3_IP4_DIP, + dip.value.addr, dip.mask.addr); + vcap_key_bytes_set(ocelot, &data, VCAP_IS2_HK_L3_IP4_SIP, + sip.value.addr, sip.mask.addr); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_DIP_EQ_SIP, + sip_eq_dip); + val = proto.value[0]; + msk = proto.mask[0]; + type = IS2_TYPE_IP_UDP_TCP; + if (msk == 0xff && (val == 6 || val == 17)) { + /* UDP/TCP protocol match */ + tcp = (val == 6 ? + OCELOT_VCAP_BIT_1 : OCELOT_VCAP_BIT_0); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_TCP, tcp); + vcap_key_l4_port_set(ocelot, &data, + VCAP_IS2_HK_L4_DPORT, dport); + vcap_key_l4_port_set(ocelot, &data, + VCAP_IS2_HK_L4_SPORT, sport); + vcap_key_set(ocelot, &data, VCAP_IS2_HK_L4_RNG, 0, 0); + vcap_key_bit_set(ocelot, &data, + VCAP_IS2_HK_L4_SPORT_EQ_DPORT, + sport_eq_dport); + vcap_key_bit_set(ocelot, &data, + VCAP_IS2_HK_L4_SEQUENCE_EQ0, + seq_zero); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_L4_FIN, + tcp_fin); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_L4_SYN, + tcp_syn); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_L4_RST, + tcp_rst); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_L4_PSH, + tcp_psh); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_L4_ACK, + tcp_ack); + vcap_key_bit_set(ocelot, &data, VCAP_IS2_HK_L4_URG, + tcp_urg); + vcap_key_set(ocelot, &data, VCAP_IS2_HK_L4_1588_DOM, + 0, 0); + vcap_key_set(ocelot, &data, VCAP_IS2_HK_L4_1588_VER, + 0, 0); + } else { + if (msk == 0) { + /* Any IP protocol match */ + type_mask = IS2_TYPE_MASK_IP_ANY; + } else { + /* Non-UDP/TCP protocol match */ + type = IS2_TYPE_IP_OTHER; + for (i = 0; i < 6; i++) { + payload.value[i] = ip_data->value[i]; + payload.mask[i] = ip_data->mask[i]; + } + } + vcap_key_bytes_set(ocelot, &data, + VCAP_IS2_HK_IP4_L3_PROTO, + proto.value, proto.mask); + vcap_key_bytes_set(ocelot, &data, + VCAP_IS2_HK_L3_PAYLOAD, + payload.value, payload.mask); + } + break; + } + case OCELOT_VCAP_KEY_ANY: + default: + type = 0; + type_mask = 0; + count = vcap_is2->entry_width / 2; + /* Iterate over the non-common part of the key and + * clear entry data + */ + for (i = ocelot->vcap_is2_keys[VCAP_IS2_HK_L2_DMAC].offset; + i < count; i += ENTRY_WIDTH) { + vcap_key_field_set(&data, i, min(32u, count - i), 0, 0); + } + break; + } + + vcap_key_set(ocelot, &data, VCAP_IS2_TYPE, type, type_mask); + is2_action_set(ocelot, &data, filter); + vcap_data_set(data.counter, data.counter_offset, + vcap_is2->counter_width, filter->stats.pkts); + + /* Write row */ + vcap_entry2cache(ocelot, &data); + vcap_action2cache(ocelot, &data); + vcap_row_cmd(ocelot, row, VCAP_CMD_WRITE, VCAP_SEL_ALL); +} + +static void is2_entry_get(struct ocelot *ocelot, struct ocelot_vcap_filter *filter, + int ix) +{ + const struct vcap_props *vcap_is2 = &ocelot->vcap[VCAP_IS2]; + struct vcap_data data; + int row = (ix / 2); + u32 cnt; + + vcap_row_cmd(ocelot, row, VCAP_CMD_READ, VCAP_SEL_COUNTER); + vcap_cache2action(ocelot, &data); + data.tg_sw = VCAP_TG_HALF; + is2_data_get(ocelot, &data, ix); + cnt = vcap_data_get(data.counter, data.counter_offset, + vcap_is2->counter_width); + + filter->stats.pkts = cnt; +} + +static int ocelot_vcap_policer_add(struct ocelot *ocelot, u32 pol_ix, + struct ocelot_policer *pol) +{ + struct qos_policer_conf pp = { 0 }; + + if (!pol) + return -EINVAL; + + pp.mode = MSCC_QOS_RATE_MODE_DATA; + pp.pir = pol->rate; + pp.pbs = pol->burst; + + return qos_policer_conf_set(ocelot, 0, pol_ix, &pp); +} + +static void ocelot_vcap_policer_del(struct ocelot *ocelot, + struct ocelot_vcap_block *block, + u32 pol_ix) +{ + struct ocelot_vcap_filter *filter; + struct qos_policer_conf pp = {0}; + int index = -1; + + if (pol_ix < block->pol_lpr) + return; + + list_for_each_entry(filter, &block->rules, list) { + index++; + if (filter->action == OCELOT_VCAP_ACTION_POLICE && + filter->pol_ix < pol_ix) { + filter->pol_ix += 1; + ocelot_vcap_policer_add(ocelot, filter->pol_ix, + &filter->pol); + is2_entry_set(ocelot, index, filter); + } + } + + pp.mode = MSCC_QOS_RATE_MODE_DISABLED; + qos_policer_conf_set(ocelot, 0, pol_ix, &pp); + + block->pol_lpr++; +} + +static void ocelot_vcap_filter_add_to_block(struct ocelot *ocelot, + struct ocelot_vcap_block *block, + struct ocelot_vcap_filter *filter) +{ + struct ocelot_vcap_filter *tmp; + struct list_head *pos, *n; + + if (filter->action == OCELOT_VCAP_ACTION_POLICE) { + block->pol_lpr--; + filter->pol_ix = block->pol_lpr; + ocelot_vcap_policer_add(ocelot, filter->pol_ix, &filter->pol); + } + + block->count++; + + if (list_empty(&block->rules)) { + list_add(&filter->list, &block->rules); + return; + } + + list_for_each_safe(pos, n, &block->rules) { + tmp = list_entry(pos, struct ocelot_vcap_filter, list); + if (filter->prio < tmp->prio) + break; + } + list_add(&filter->list, pos->prev); +} + +static int ocelot_vcap_block_get_filter_index(struct ocelot_vcap_block *block, + struct ocelot_vcap_filter *filter) +{ + struct ocelot_vcap_filter *tmp; + int index = -1; + + list_for_each_entry(tmp, &block->rules, list) { + ++index; + if (filter->id == tmp->id) + break; + } + return index; +} + +static struct ocelot_vcap_filter* +ocelot_vcap_block_find_filter(struct ocelot_vcap_block *block, + int index) +{ + struct ocelot_vcap_filter *tmp; + int i = 0; + + list_for_each_entry(tmp, &block->rules, list) { + if (i == index) + return tmp; + ++i; + } + + return NULL; +} + +/* If @on=false, then SNAP, ARP, IP and OAM frames will not match on keys based + * on destination and source MAC addresses, but only on higher-level protocol + * information. The only frame types to match on keys containing MAC addresses + * in this case are non-SNAP, non-ARP, non-IP and non-OAM frames. + * + * If @on=true, then the above frame types (SNAP, ARP, IP and OAM) will match + * on MAC_ETYPE keys such as destination and source MAC on this ingress port. + * However the setting has the side effect of making these frames not matching + * on any _other_ keys than MAC_ETYPE ones. + */ +static void ocelot_match_all_as_mac_etype(struct ocelot *ocelot, int port, + bool on) +{ + u32 val = 0; + + if (on) + val = ANA_PORT_VCAP_S2_CFG_S2_SNAP_DIS(3) | + ANA_PORT_VCAP_S2_CFG_S2_ARP_DIS(3) | + ANA_PORT_VCAP_S2_CFG_S2_IP_TCPUDP_DIS(3) | + ANA_PORT_VCAP_S2_CFG_S2_IP_OTHER_DIS(3) | + ANA_PORT_VCAP_S2_CFG_S2_OAM_DIS(3); + + ocelot_rmw_gix(ocelot, val, + ANA_PORT_VCAP_S2_CFG_S2_SNAP_DIS_M | + ANA_PORT_VCAP_S2_CFG_S2_ARP_DIS_M | + ANA_PORT_VCAP_S2_CFG_S2_IP_TCPUDP_DIS_M | + ANA_PORT_VCAP_S2_CFG_S2_IP_OTHER_DIS_M | + ANA_PORT_VCAP_S2_CFG_S2_OAM_DIS_M, + ANA_PORT_VCAP_S2_CFG, port); +} + +static bool +ocelot_vcap_is_problematic_mac_etype(struct ocelot_vcap_filter *filter) +{ + u16 proto, mask; + + if (filter->key_type != OCELOT_VCAP_KEY_ETYPE) + return false; + + proto = ntohs(*(__be16 *)filter->key.etype.etype.value); + mask = ntohs(*(__be16 *)filter->key.etype.etype.mask); + + /* ETH_P_ALL match, so all protocols below are included */ + if (mask == 0) + return true; + if (proto == ETH_P_ARP) + return true; + if (proto == ETH_P_IP) + return true; + if (proto == ETH_P_IPV6) + return true; + + return false; +} + +static bool +ocelot_vcap_is_problematic_non_mac_etype(struct ocelot_vcap_filter *filter) +{ + if (filter->key_type == OCELOT_VCAP_KEY_SNAP) + return true; + if (filter->key_type == OCELOT_VCAP_KEY_ARP) + return true; + if (filter->key_type == OCELOT_VCAP_KEY_IPV4) + return true; + if (filter->key_type == OCELOT_VCAP_KEY_IPV6) + return true; + return false; +} + +static bool +ocelot_exclusive_mac_etype_filter_rules(struct ocelot *ocelot, + struct ocelot_vcap_filter *filter) +{ + struct ocelot_vcap_block *block = &ocelot->block; + struct ocelot_vcap_filter *tmp; + unsigned long port; + int i; + + if (ocelot_vcap_is_problematic_mac_etype(filter)) { + /* Search for any non-MAC_ETYPE rules on the port */ + for (i = 0; i < block->count; i++) { + tmp = ocelot_vcap_block_find_filter(block, i); + if (tmp->ingress_port_mask & filter->ingress_port_mask && + ocelot_vcap_is_problematic_non_mac_etype(tmp)) + return false; + } + + for_each_set_bit(port, &filter->ingress_port_mask, + ocelot->num_phys_ports) + ocelot_match_all_as_mac_etype(ocelot, port, true); + } else if (ocelot_vcap_is_problematic_non_mac_etype(filter)) { + /* Search for any MAC_ETYPE rules on the port */ + for (i = 0; i < block->count; i++) { + tmp = ocelot_vcap_block_find_filter(block, i); + if (tmp->ingress_port_mask & filter->ingress_port_mask && + ocelot_vcap_is_problematic_mac_etype(tmp)) + return false; + } + + for_each_set_bit(port, &filter->ingress_port_mask, + ocelot->num_phys_ports) + ocelot_match_all_as_mac_etype(ocelot, port, false); + } + + return true; +} + +int ocelot_vcap_filter_add(struct ocelot *ocelot, + struct ocelot_vcap_filter *filter, + struct netlink_ext_ack *extack) +{ + struct ocelot_vcap_block *block = &ocelot->block; + int i, index; + + if (!ocelot_exclusive_mac_etype_filter_rules(ocelot, filter)) { + NL_SET_ERR_MSG_MOD(extack, + "Cannot mix MAC_ETYPE with non-MAC_ETYPE rules"); + return -EBUSY; + } + + /* Add filter to the linked list */ + ocelot_vcap_filter_add_to_block(ocelot, block, filter); + + /* Get the index of the inserted filter */ + index = ocelot_vcap_block_get_filter_index(block, filter); + + /* Move down the rules to make place for the new filter */ + for (i = block->count - 1; i > index; i--) { + struct ocelot_vcap_filter *tmp; + + tmp = ocelot_vcap_block_find_filter(block, i); + is2_entry_set(ocelot, i, tmp); + } + + /* Now insert the new filter */ + is2_entry_set(ocelot, index, filter); + return 0; +} + +static void ocelot_vcap_block_remove_filter(struct ocelot *ocelot, + struct ocelot_vcap_block *block, + struct ocelot_vcap_filter *filter) +{ + struct ocelot_vcap_filter *tmp; + struct list_head *pos, *q; + + list_for_each_safe(pos, q, &block->rules) { + tmp = list_entry(pos, struct ocelot_vcap_filter, list); + if (tmp->id == filter->id) { + if (tmp->action == OCELOT_VCAP_ACTION_POLICE) + ocelot_vcap_policer_del(ocelot, block, + tmp->pol_ix); + + list_del(pos); + kfree(tmp); + } + } + + block->count--; +} + +int ocelot_vcap_filter_del(struct ocelot *ocelot, + struct ocelot_vcap_filter *filter) +{ + struct ocelot_vcap_block *block = &ocelot->block; + struct ocelot_vcap_filter del_filter; + int i, index; + + memset(&del_filter, 0, sizeof(del_filter)); + + /* Gets index of the filter */ + index = ocelot_vcap_block_get_filter_index(block, filter); + + /* Delete filter */ + ocelot_vcap_block_remove_filter(ocelot, block, filter); + + /* Move up all the blocks over the deleted filter */ + for (i = index; i < block->count; i++) { + struct ocelot_vcap_filter *tmp; + + tmp = ocelot_vcap_block_find_filter(block, i); + is2_entry_set(ocelot, i, tmp); + } + + /* Now delete the last filter, because it is duplicated */ + is2_entry_set(ocelot, block->count, &del_filter); + + return 0; +} + +int ocelot_vcap_filter_stats_update(struct ocelot *ocelot, + struct ocelot_vcap_filter *filter) +{ + struct ocelot_vcap_block *block = &ocelot->block; + struct ocelot_vcap_filter *tmp; + int index; + + index = ocelot_vcap_block_get_filter_index(block, filter); + is2_entry_get(ocelot, filter, index); + + /* After we get the result we need to clear the counters */ + tmp = ocelot_vcap_block_find_filter(block, index); + tmp->stats.pkts = 0; + is2_entry_set(ocelot, index, tmp); + + return 0; +} + +int ocelot_vcap_init(struct ocelot *ocelot) +{ + const struct vcap_props *vcap_is2 = &ocelot->vcap[VCAP_IS2]; + struct ocelot_vcap_block *block = &ocelot->block; + struct vcap_data data; + + memset(&data, 0, sizeof(data)); + + vcap_entry2cache(ocelot, &data); + ocelot_write(ocelot, vcap_is2->entry_count, S2_CORE_MV_CFG); + vcap_cmd(ocelot, 0, VCAP_CMD_INITIALIZE, VCAP_SEL_ENTRY); + + vcap_action2cache(ocelot, &data); + ocelot_write(ocelot, vcap_is2->action_count, S2_CORE_MV_CFG); + vcap_cmd(ocelot, 0, VCAP_CMD_INITIALIZE, + VCAP_SEL_ACTION | VCAP_SEL_COUNTER); + + /* Create a policer that will drop the frames for the cpu. + * This policer will be used as action in the acl rules to drop + * frames. + */ + ocelot_write_gix(ocelot, 0x299, ANA_POL_MODE_CFG, + OCELOT_POLICER_DISCARD); + ocelot_write_gix(ocelot, 0x1, ANA_POL_PIR_CFG, + OCELOT_POLICER_DISCARD); + ocelot_write_gix(ocelot, 0x3fffff, ANA_POL_PIR_STATE, + OCELOT_POLICER_DISCARD); + ocelot_write_gix(ocelot, 0x0, ANA_POL_CIR_CFG, + OCELOT_POLICER_DISCARD); + ocelot_write_gix(ocelot, 0x3fffff, ANA_POL_CIR_STATE, + OCELOT_POLICER_DISCARD); + + block->pol_lpr = OCELOT_POLICER_DISCARD - 1; + + INIT_LIST_HEAD(&ocelot->block.rules); + + return 0; +} |