diff options
Diffstat (limited to 'drivers/net/ethernet/sfc/mae.c')
| -rw-r--r-- | drivers/net/ethernet/sfc/mae.c | 511 |
1 files changed, 511 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/mae.c b/drivers/net/ethernet/sfc/mae.c new file mode 100644 index 000000000..874c765b2 --- /dev/null +++ b/drivers/net/ethernet/sfc/mae.c @@ -0,0 +1,511 @@ +// SPDX-License-Identifier: GPL-2.0-only +/**************************************************************************** + * Driver for Solarflare network controllers and boards + * Copyright 2019 Solarflare Communications Inc. + * Copyright 2020-2022 Xilinx Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation, incorporated herein by reference. + */ + +#include "mae.h" +#include "mcdi.h" +#include "mcdi_pcol_mae.h" + +int efx_mae_allocate_mport(struct efx_nic *efx, u32 *id, u32 *label) +{ + MCDI_DECLARE_BUF(outbuf, MC_CMD_MAE_MPORT_ALLOC_ALIAS_OUT_LEN); + MCDI_DECLARE_BUF(inbuf, MC_CMD_MAE_MPORT_ALLOC_ALIAS_IN_LEN); + size_t outlen; + int rc; + + if (WARN_ON_ONCE(!id)) + return -EINVAL; + if (WARN_ON_ONCE(!label)) + return -EINVAL; + + MCDI_SET_DWORD(inbuf, MAE_MPORT_ALLOC_ALIAS_IN_TYPE, + MC_CMD_MAE_MPORT_ALLOC_ALIAS_IN_MPORT_TYPE_ALIAS); + MCDI_SET_DWORD(inbuf, MAE_MPORT_ALLOC_ALIAS_IN_DELIVER_MPORT, + MAE_MPORT_SELECTOR_ASSIGNED); + rc = efx_mcdi_rpc(efx, MC_CMD_MAE_MPORT_ALLOC, inbuf, sizeof(inbuf), + outbuf, sizeof(outbuf), &outlen); + if (rc) + return rc; + if (outlen < sizeof(outbuf)) + return -EIO; + *id = MCDI_DWORD(outbuf, MAE_MPORT_ALLOC_ALIAS_OUT_MPORT_ID); + *label = MCDI_DWORD(outbuf, MAE_MPORT_ALLOC_ALIAS_OUT_LABEL); + return 0; +} + +int efx_mae_free_mport(struct efx_nic *efx, u32 id) +{ + MCDI_DECLARE_BUF(inbuf, MC_CMD_MAE_MPORT_FREE_IN_LEN); + + BUILD_BUG_ON(MC_CMD_MAE_MPORT_FREE_OUT_LEN); + MCDI_SET_DWORD(inbuf, MAE_MPORT_FREE_IN_MPORT_ID, id); + return efx_mcdi_rpc(efx, MC_CMD_MAE_MPORT_FREE, inbuf, sizeof(inbuf), + NULL, 0, NULL); +} + +void efx_mae_mport_wire(struct efx_nic *efx, u32 *out) +{ + efx_dword_t mport; + + EFX_POPULATE_DWORD_2(mport, + MAE_MPORT_SELECTOR_TYPE, MAE_MPORT_SELECTOR_TYPE_PPORT, + MAE_MPORT_SELECTOR_PPORT_ID, efx->port_num); + *out = EFX_DWORD_VAL(mport); +} + +void efx_mae_mport_uplink(struct efx_nic *efx __always_unused, u32 *out) +{ + efx_dword_t mport; + + EFX_POPULATE_DWORD_3(mport, + MAE_MPORT_SELECTOR_TYPE, MAE_MPORT_SELECTOR_TYPE_FUNC, + MAE_MPORT_SELECTOR_FUNC_PF_ID, MAE_MPORT_SELECTOR_FUNC_PF_ID_CALLER, + MAE_MPORT_SELECTOR_FUNC_VF_ID, MAE_MPORT_SELECTOR_FUNC_VF_ID_NULL); + *out = EFX_DWORD_VAL(mport); +} + +void efx_mae_mport_vf(struct efx_nic *efx __always_unused, u32 vf_id, u32 *out) +{ + efx_dword_t mport; + + EFX_POPULATE_DWORD_3(mport, + MAE_MPORT_SELECTOR_TYPE, MAE_MPORT_SELECTOR_TYPE_FUNC, + MAE_MPORT_SELECTOR_FUNC_PF_ID, MAE_MPORT_SELECTOR_FUNC_PF_ID_CALLER, + MAE_MPORT_SELECTOR_FUNC_VF_ID, vf_id); + *out = EFX_DWORD_VAL(mport); +} + +/* Constructs an mport selector from an mport ID, because they're not the same */ +void efx_mae_mport_mport(struct efx_nic *efx __always_unused, u32 mport_id, u32 *out) +{ + efx_dword_t mport; + + EFX_POPULATE_DWORD_2(mport, + MAE_MPORT_SELECTOR_TYPE, MAE_MPORT_SELECTOR_TYPE_MPORT_ID, + MAE_MPORT_SELECTOR_MPORT_ID, mport_id); + *out = EFX_DWORD_VAL(mport); +} + +/* id is really only 24 bits wide */ +int efx_mae_lookup_mport(struct efx_nic *efx, u32 selector, u32 *id) +{ + MCDI_DECLARE_BUF(outbuf, MC_CMD_MAE_MPORT_LOOKUP_OUT_LEN); + MCDI_DECLARE_BUF(inbuf, MC_CMD_MAE_MPORT_LOOKUP_IN_LEN); + size_t outlen; + int rc; + + MCDI_SET_DWORD(inbuf, MAE_MPORT_LOOKUP_IN_MPORT_SELECTOR, selector); + rc = efx_mcdi_rpc(efx, MC_CMD_MAE_MPORT_LOOKUP, inbuf, sizeof(inbuf), + outbuf, sizeof(outbuf), &outlen); + if (rc) + return rc; + if (outlen < sizeof(outbuf)) + return -EIO; + *id = MCDI_DWORD(outbuf, MAE_MPORT_LOOKUP_OUT_MPORT_ID); + return 0; +} + +static int efx_mae_get_basic_caps(struct efx_nic *efx, struct mae_caps *caps) +{ + MCDI_DECLARE_BUF(outbuf, MC_CMD_MAE_GET_CAPS_OUT_LEN); + size_t outlen; + int rc; + + BUILD_BUG_ON(MC_CMD_MAE_GET_CAPS_IN_LEN); + + rc = efx_mcdi_rpc(efx, MC_CMD_MAE_GET_CAPS, NULL, 0, outbuf, + sizeof(outbuf), &outlen); + if (rc) + return rc; + if (outlen < sizeof(outbuf)) + return -EIO; + caps->match_field_count = MCDI_DWORD(outbuf, MAE_GET_CAPS_OUT_MATCH_FIELD_COUNT); + caps->action_prios = MCDI_DWORD(outbuf, MAE_GET_CAPS_OUT_ACTION_PRIOS); + return 0; +} + +static int efx_mae_get_rule_fields(struct efx_nic *efx, u32 cmd, + u8 *field_support) +{ + MCDI_DECLARE_BUF(outbuf, MC_CMD_MAE_GET_AR_CAPS_OUT_LEN(MAE_NUM_FIELDS)); + MCDI_DECLARE_STRUCT_PTR(caps); + unsigned int count; + size_t outlen; + int rc, i; + + BUILD_BUG_ON(MC_CMD_MAE_GET_AR_CAPS_IN_LEN); + + rc = efx_mcdi_rpc(efx, cmd, NULL, 0, outbuf, sizeof(outbuf), &outlen); + if (rc) + return rc; + count = MCDI_DWORD(outbuf, MAE_GET_AR_CAPS_OUT_COUNT); + memset(field_support, MAE_FIELD_UNSUPPORTED, MAE_NUM_FIELDS); + caps = _MCDI_DWORD(outbuf, MAE_GET_AR_CAPS_OUT_FIELD_FLAGS); + /* We're only interested in the support status enum, not any other + * flags, so just extract that from each entry. + */ + for (i = 0; i < count; i++) + if (i * sizeof(*outbuf) + MC_CMD_MAE_GET_AR_CAPS_OUT_FIELD_FLAGS_OFST < outlen) + field_support[i] = EFX_DWORD_FIELD(caps[i], MAE_FIELD_FLAGS_SUPPORT_STATUS); + return 0; +} + +int efx_mae_get_caps(struct efx_nic *efx, struct mae_caps *caps) +{ + int rc; + + rc = efx_mae_get_basic_caps(efx, caps); + if (rc) + return rc; + return efx_mae_get_rule_fields(efx, MC_CMD_MAE_GET_AR_CAPS, + caps->action_rule_fields); +} + +/* Bit twiddling: + * Prefix: 1...110...0 + * ~: 0...001...1 + * + 1: 0...010...0 is power of two + * so (~x) & ((~x) + 1) == 0. Converse holds also. + */ +#define is_prefix_byte(_x) !(((_x) ^ 0xff) & (((_x) ^ 0xff) + 1)) + +enum mask_type { MASK_ONES, MASK_ZEROES, MASK_PREFIX, MASK_OTHER }; + +static const char *mask_type_name(enum mask_type typ) +{ + switch (typ) { + case MASK_ONES: + return "all-1s"; + case MASK_ZEROES: + return "all-0s"; + case MASK_PREFIX: + return "prefix"; + case MASK_OTHER: + return "arbitrary"; + default: /* can't happen */ + return "unknown"; + } +} + +/* Checks a (big-endian) bytestring is a bit prefix */ +static enum mask_type classify_mask(const u8 *mask, size_t len) +{ + bool zeroes = true; /* All bits seen so far are zeroes */ + bool ones = true; /* All bits seen so far are ones */ + bool prefix = true; /* Valid prefix so far */ + size_t i; + + for (i = 0; i < len; i++) { + if (ones) { + if (!is_prefix_byte(mask[i])) + prefix = false; + } else if (mask[i]) { + prefix = false; + } + if (mask[i] != 0xff) + ones = false; + if (mask[i]) + zeroes = false; + } + if (ones) + return MASK_ONES; + if (zeroes) + return MASK_ZEROES; + if (prefix) + return MASK_PREFIX; + return MASK_OTHER; +} + +static int efx_mae_match_check_cap_typ(u8 support, enum mask_type typ) +{ + switch (support) { + case MAE_FIELD_UNSUPPORTED: + case MAE_FIELD_SUPPORTED_MATCH_NEVER: + if (typ == MASK_ZEROES) + return 0; + return -EOPNOTSUPP; + case MAE_FIELD_SUPPORTED_MATCH_OPTIONAL: + if (typ == MASK_ZEROES) + return 0; + fallthrough; + case MAE_FIELD_SUPPORTED_MATCH_ALWAYS: + if (typ == MASK_ONES) + return 0; + return -EINVAL; + case MAE_FIELD_SUPPORTED_MATCH_PREFIX: + if (typ == MASK_OTHER) + return -EOPNOTSUPP; + return 0; + case MAE_FIELD_SUPPORTED_MATCH_MASK: + return 0; + default: + return -EIO; + } +} + +int efx_mae_match_check_caps(struct efx_nic *efx, + const struct efx_tc_match_fields *mask, + struct netlink_ext_ack *extack) +{ + const u8 *supported_fields = efx->tc->caps->action_rule_fields; + __be32 ingress_port = cpu_to_be32(mask->ingress_port); + enum mask_type ingress_port_mask_type; + int rc; + + /* Check for _PREFIX assumes big-endian, so we need to convert */ + ingress_port_mask_type = classify_mask((const u8 *)&ingress_port, + sizeof(ingress_port)); + rc = efx_mae_match_check_cap_typ(supported_fields[MAE_FIELD_INGRESS_PORT], + ingress_port_mask_type); + if (rc) { + efx_tc_err(efx, "No support for %s mask in field ingress_port\n", + mask_type_name(ingress_port_mask_type)); + NL_SET_ERR_MSG_MOD(extack, "Unsupported mask type for ingress_port"); + return rc; + } + return 0; +} + +static bool efx_mae_asl_id(u32 id) +{ + return !!(id & BIT(31)); +} + +int efx_mae_alloc_action_set(struct efx_nic *efx, struct efx_tc_action_set *act) +{ + MCDI_DECLARE_BUF(outbuf, MC_CMD_MAE_ACTION_SET_ALLOC_OUT_LEN); + MCDI_DECLARE_BUF(inbuf, MC_CMD_MAE_ACTION_SET_ALLOC_IN_LEN); + size_t outlen; + int rc; + + MCDI_SET_DWORD(inbuf, MAE_ACTION_SET_ALLOC_IN_SRC_MAC_ID, + MC_CMD_MAE_MAC_ADDR_ALLOC_OUT_MAC_ID_NULL); + MCDI_SET_DWORD(inbuf, MAE_ACTION_SET_ALLOC_IN_DST_MAC_ID, + MC_CMD_MAE_MAC_ADDR_ALLOC_OUT_MAC_ID_NULL); + MCDI_SET_DWORD(inbuf, MAE_ACTION_SET_ALLOC_IN_COUNTER_ID, + MC_CMD_MAE_COUNTER_ALLOC_OUT_COUNTER_ID_NULL); + MCDI_SET_DWORD(inbuf, MAE_ACTION_SET_ALLOC_IN_COUNTER_LIST_ID, + MC_CMD_MAE_COUNTER_LIST_ALLOC_OUT_COUNTER_LIST_ID_NULL); + MCDI_SET_DWORD(inbuf, MAE_ACTION_SET_ALLOC_IN_ENCAP_HEADER_ID, + MC_CMD_MAE_ENCAP_HEADER_ALLOC_OUT_ENCAP_HEADER_ID_NULL); + if (act->deliver) + MCDI_SET_DWORD(inbuf, MAE_ACTION_SET_ALLOC_IN_DELIVER, + act->dest_mport); + BUILD_BUG_ON(MAE_MPORT_SELECTOR_NULL); + rc = efx_mcdi_rpc(efx, MC_CMD_MAE_ACTION_SET_ALLOC, inbuf, sizeof(inbuf), + outbuf, sizeof(outbuf), &outlen); + if (rc) + return rc; + if (outlen < sizeof(outbuf)) + return -EIO; + act->fw_id = MCDI_DWORD(outbuf, MAE_ACTION_SET_ALLOC_OUT_AS_ID); + /* We rely on the high bit of AS IDs always being clear. + * The firmware API guarantees this, but let's check it ourselves. + */ + if (WARN_ON_ONCE(efx_mae_asl_id(act->fw_id))) { + efx_mae_free_action_set(efx, act->fw_id); + return -EIO; + } + return 0; +} + +int efx_mae_free_action_set(struct efx_nic *efx, u32 fw_id) +{ + MCDI_DECLARE_BUF(outbuf, MC_CMD_MAE_ACTION_SET_FREE_OUT_LEN(1)); + MCDI_DECLARE_BUF(inbuf, MC_CMD_MAE_ACTION_SET_FREE_IN_LEN(1)); + size_t outlen; + int rc; + + MCDI_SET_DWORD(inbuf, MAE_ACTION_SET_FREE_IN_AS_ID, fw_id); + rc = efx_mcdi_rpc(efx, MC_CMD_MAE_ACTION_SET_FREE, inbuf, sizeof(inbuf), + outbuf, sizeof(outbuf), &outlen); + if (rc) + return rc; + if (outlen < sizeof(outbuf)) + return -EIO; + /* FW freed a different ID than we asked for, should never happen. + * Warn because it means we've now got a different idea to the FW of + * what action-sets exist, which could cause mayhem later. + */ + if (WARN_ON(MCDI_DWORD(outbuf, MAE_ACTION_SET_FREE_OUT_FREED_AS_ID) != fw_id)) + return -EIO; + return 0; +} + +int efx_mae_alloc_action_set_list(struct efx_nic *efx, + struct efx_tc_action_set_list *acts) +{ + MCDI_DECLARE_BUF(outbuf, MC_CMD_MAE_ACTION_SET_LIST_ALLOC_OUT_LEN); + struct efx_tc_action_set *act; + size_t inlen, outlen, i = 0; + efx_dword_t *inbuf; + int rc; + + list_for_each_entry(act, &acts->list, list) + i++; + if (i == 0) + return -EINVAL; + if (i == 1) { + /* Don't wrap an ASL around a single AS, just use the AS_ID + * directly. ASLs are a more limited resource. + */ + act = list_first_entry(&acts->list, struct efx_tc_action_set, list); + acts->fw_id = act->fw_id; + return 0; + } + if (i > MC_CMD_MAE_ACTION_SET_LIST_ALLOC_IN_AS_IDS_MAXNUM_MCDI2) + return -EOPNOTSUPP; /* Too many actions */ + inlen = MC_CMD_MAE_ACTION_SET_LIST_ALLOC_IN_LEN(i); + inbuf = kzalloc(inlen, GFP_KERNEL); + if (!inbuf) + return -ENOMEM; + i = 0; + list_for_each_entry(act, &acts->list, list) { + MCDI_SET_ARRAY_DWORD(inbuf, MAE_ACTION_SET_LIST_ALLOC_IN_AS_IDS, + i, act->fw_id); + i++; + } + MCDI_SET_DWORD(inbuf, MAE_ACTION_SET_LIST_ALLOC_IN_COUNT, i); + rc = efx_mcdi_rpc(efx, MC_CMD_MAE_ACTION_SET_LIST_ALLOC, inbuf, inlen, + outbuf, sizeof(outbuf), &outlen); + if (rc) + goto out_free; + if (outlen < sizeof(outbuf)) { + rc = -EIO; + goto out_free; + } + acts->fw_id = MCDI_DWORD(outbuf, MAE_ACTION_SET_LIST_ALLOC_OUT_ASL_ID); + /* We rely on the high bit of ASL IDs always being set. + * The firmware API guarantees this, but let's check it ourselves. + */ + if (WARN_ON_ONCE(!efx_mae_asl_id(acts->fw_id))) { + efx_mae_free_action_set_list(efx, acts); + rc = -EIO; + } +out_free: + kfree(inbuf); + return rc; +} + +int efx_mae_free_action_set_list(struct efx_nic *efx, + struct efx_tc_action_set_list *acts) +{ + MCDI_DECLARE_BUF(outbuf, MC_CMD_MAE_ACTION_SET_LIST_FREE_OUT_LEN(1)); + MCDI_DECLARE_BUF(inbuf, MC_CMD_MAE_ACTION_SET_LIST_FREE_IN_LEN(1)); + size_t outlen; + int rc; + + /* If this is just an AS_ID with no ASL wrapper, then there is + * nothing for us to free. (The AS will be freed later.) + */ + if (efx_mae_asl_id(acts->fw_id)) { + MCDI_SET_DWORD(inbuf, MAE_ACTION_SET_LIST_FREE_IN_ASL_ID, + acts->fw_id); + rc = efx_mcdi_rpc(efx, MC_CMD_MAE_ACTION_SET_LIST_FREE, inbuf, + sizeof(inbuf), outbuf, sizeof(outbuf), &outlen); + if (rc) + return rc; + if (outlen < sizeof(outbuf)) + return -EIO; + /* FW freed a different ID than we asked for, should never happen. + * Warn because it means we've now got a different idea to the FW of + * what action-set-lists exist, which could cause mayhem later. + */ + if (WARN_ON(MCDI_DWORD(outbuf, MAE_ACTION_SET_LIST_FREE_OUT_FREED_ASL_ID) != acts->fw_id)) + return -EIO; + } + /* We're probably about to free @acts, but let's just make sure its + * fw_id is blatted so that it won't look valid if it leaks out. + */ + acts->fw_id = MC_CMD_MAE_ACTION_SET_LIST_ALLOC_OUT_ACTION_SET_LIST_ID_NULL; + return 0; +} + +static int efx_mae_populate_match_criteria(MCDI_DECLARE_STRUCT_PTR(match_crit), + const struct efx_tc_match *match) +{ + if (match->mask.ingress_port) { + if (~match->mask.ingress_port) + return -EOPNOTSUPP; + MCDI_STRUCT_SET_DWORD(match_crit, + MAE_FIELD_MASK_VALUE_PAIRS_V2_INGRESS_MPORT_SELECTOR, + match->value.ingress_port); + } + MCDI_STRUCT_SET_DWORD(match_crit, MAE_FIELD_MASK_VALUE_PAIRS_V2_INGRESS_MPORT_SELECTOR_MASK, + match->mask.ingress_port); + MCDI_STRUCT_SET_BYTE(match_crit, MAE_FIELD_MASK_VALUE_PAIRS_V2_RECIRC_ID, + match->value.recirc_id); + MCDI_STRUCT_SET_BYTE(match_crit, MAE_FIELD_MASK_VALUE_PAIRS_V2_RECIRC_ID_MASK, + match->mask.recirc_id); + return 0; +} + +int efx_mae_insert_rule(struct efx_nic *efx, const struct efx_tc_match *match, + u32 prio, u32 acts_id, u32 *id) +{ + MCDI_DECLARE_BUF(inbuf, MC_CMD_MAE_ACTION_RULE_INSERT_IN_LEN(MAE_FIELD_MASK_VALUE_PAIRS_V2_LEN)); + MCDI_DECLARE_BUF(outbuf, MC_CMD_MAE_ACTION_RULE_INSERT_OUT_LEN); + MCDI_DECLARE_STRUCT_PTR(match_crit); + MCDI_DECLARE_STRUCT_PTR(response); + size_t outlen; + int rc; + + if (!id) + return -EINVAL; + + match_crit = _MCDI_DWORD(inbuf, MAE_ACTION_RULE_INSERT_IN_MATCH_CRITERIA); + response = _MCDI_DWORD(inbuf, MAE_ACTION_RULE_INSERT_IN_RESPONSE); + if (efx_mae_asl_id(acts_id)) { + MCDI_STRUCT_SET_DWORD(response, MAE_ACTION_RULE_RESPONSE_ASL_ID, acts_id); + MCDI_STRUCT_SET_DWORD(response, MAE_ACTION_RULE_RESPONSE_AS_ID, + MC_CMD_MAE_ACTION_SET_ALLOC_OUT_ACTION_SET_ID_NULL); + } else { + /* We only had one AS, so we didn't wrap it in an ASL */ + MCDI_STRUCT_SET_DWORD(response, MAE_ACTION_RULE_RESPONSE_ASL_ID, + MC_CMD_MAE_ACTION_SET_LIST_ALLOC_OUT_ACTION_SET_LIST_ID_NULL); + MCDI_STRUCT_SET_DWORD(response, MAE_ACTION_RULE_RESPONSE_AS_ID, acts_id); + } + MCDI_SET_DWORD(inbuf, MAE_ACTION_RULE_INSERT_IN_PRIO, prio); + rc = efx_mae_populate_match_criteria(match_crit, match); + if (rc) + return rc; + + rc = efx_mcdi_rpc(efx, MC_CMD_MAE_ACTION_RULE_INSERT, inbuf, sizeof(inbuf), + outbuf, sizeof(outbuf), &outlen); + if (rc) + return rc; + if (outlen < sizeof(outbuf)) + return -EIO; + *id = MCDI_DWORD(outbuf, MAE_ACTION_RULE_INSERT_OUT_AR_ID); + return 0; +} + +int efx_mae_delete_rule(struct efx_nic *efx, u32 id) +{ + MCDI_DECLARE_BUF(outbuf, MC_CMD_MAE_ACTION_RULE_DELETE_OUT_LEN(1)); + MCDI_DECLARE_BUF(inbuf, MC_CMD_MAE_ACTION_RULE_DELETE_IN_LEN(1)); + size_t outlen; + int rc; + + MCDI_SET_DWORD(inbuf, MAE_ACTION_RULE_DELETE_IN_AR_ID, id); + rc = efx_mcdi_rpc(efx, MC_CMD_MAE_ACTION_RULE_DELETE, inbuf, sizeof(inbuf), + outbuf, sizeof(outbuf), &outlen); + if (rc) + return rc; + if (outlen < sizeof(outbuf)) + return -EIO; + /* FW freed a different ID than we asked for, should also never happen. + * Warn because it means we've now got a different idea to the FW of + * what rules exist, which could cause mayhem later. + */ + if (WARN_ON(MCDI_DWORD(outbuf, MAE_ACTION_RULE_DELETE_OUT_DELETED_AR_ID) != id)) + return -EIO; + return 0; +} |