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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2014-2023 Broadcom
* All rights reserved.
*/
#include "bnxt.h"
#include "bnxt_ulp.h"
#include "bnxt_ulp_utils.h"
#include "ulp_tun.h"
#include "ulp_utils.h"
/* returns negative on error, 1 if new entry is allocated or zero if old */
int32_t
ulp_app_tun_search_entry(struct bnxt_ulp_context *ulp_ctx,
struct rte_flow_tunnel *app_tunnel,
struct bnxt_flow_app_tun_ent **tun_entry)
{
struct bnxt_flow_app_tun_ent *tun_ent_list;
int32_t i, rc = 0, free_entry = -1;
tun_ent_list = bnxt_ulp_cntxt_ptr2_app_tun_list_get(ulp_ctx);
if (!tun_ent_list) {
BNXT_DRV_DBG(ERR, "unable to get the app tunnel list\n");
return -EINVAL;
}
for (i = 0; i < BNXT_ULP_MAX_TUN_CACHE_ENTRIES; i++) {
if (!tun_ent_list[i].ref_cnt) {
if (free_entry < 0)
free_entry = i;
} else {
if (!memcmp(&tun_ent_list[i].app_tunnel,
app_tunnel,
sizeof(struct rte_flow_tunnel))) {
*tun_entry = &tun_ent_list[i];
tun_ent_list[free_entry].ref_cnt++;
return rc;
}
}
}
if (free_entry >= 0) {
*tun_entry = &tun_ent_list[free_entry];
tun_ent_list[free_entry].app_tunnel = *app_tunnel;
tun_ent_list[free_entry].ref_cnt = 1;
rc = 1;
} else {
BNXT_DRV_DBG(ERR, "ulp app tunnel list is full\n");
return -ENOMEM;
}
return rc;
}
void
ulp_app_tun_entry_delete(struct bnxt_flow_app_tun_ent *tun_entry)
{
if (tun_entry) {
if (tun_entry->ref_cnt) {
tun_entry->ref_cnt--;
if (!tun_entry->ref_cnt)
memset(tun_entry, 0,
sizeof(struct bnxt_flow_app_tun_ent));
}
}
}
int32_t
ulp_app_tun_entry_set_decap_action(struct bnxt_flow_app_tun_ent *tun_entry)
{
if (!tun_entry)
return -EINVAL;
tun_entry->action.type = (typeof(tun_entry->action.type))
BNXT_RTE_FLOW_ACTION_TYPE_VXLAN_DECAP;
tun_entry->action.conf = tun_entry;
return 0;
}
int32_t
ulp_app_tun_entry_set_decap_item(struct bnxt_flow_app_tun_ent *tun_entry)
{
if (!tun_entry)
return -EINVAL;
tun_entry->item.type = (typeof(tun_entry->item.type))
BNXT_RTE_FLOW_ITEM_TYPE_VXLAN_DECAP;
tun_entry->item.spec = tun_entry;
tun_entry->item.last = NULL;
tun_entry->item.mask = NULL;
return 0;
}
struct bnxt_flow_app_tun_ent *
ulp_app_tun_match_entry(struct bnxt_ulp_context *ulp_ctx,
const void *ctx)
{
struct bnxt_flow_app_tun_ent *tun_ent_list;
int32_t i;
tun_ent_list = bnxt_ulp_cntxt_ptr2_app_tun_list_get(ulp_ctx);
if (!tun_ent_list) {
BNXT_DRV_DBG(ERR, "unable to get the app tunnel list\n");
return NULL;
}
for (i = 0; i < BNXT_ULP_MAX_TUN_CACHE_ENTRIES; i++) {
if (&tun_ent_list[i] == ctx)
return &tun_ent_list[i];
}
return NULL;
}
static int32_t
ulp_get_tun_entry(struct ulp_rte_parser_params *params,
struct bnxt_tun_cache_entry **tun_entry,
uint16_t *tun_idx)
{
int32_t i, first_free_entry = BNXT_ULP_TUN_ENTRY_INVALID;
struct bnxt_tun_cache_entry *tun_tbl;
uint32_t dip_idx, dmac_idx, use_ipv4 = 0;
tun_tbl = bnxt_ulp_cntxt_ptr2_tun_tbl_get(params->ulp_ctx);
if (!tun_tbl) {
BNXT_DRV_DBG(ERR, "Error: could not get Tunnel table\n");
return BNXT_TF_RC_ERROR;
}
/* get the outer destination ip field index */
dip_idx = ULP_COMP_FLD_IDX_RD(params, BNXT_ULP_CF_IDX_TUN_OFF_DIP_ID);
dmac_idx = ULP_COMP_FLD_IDX_RD(params, BNXT_ULP_CF_IDX_TUN_OFF_DMAC_ID);
if (ULP_BITMAP_ISSET(params->hdr_bitmap.bits, BNXT_ULP_HDR_BIT_O_IPV4))
use_ipv4 = 1;
for (i = 0; i < BNXT_ULP_MAX_TUN_CACHE_ENTRIES; i++) {
if (!tun_tbl[i].t_dst_ip_valid) {
if (first_free_entry == BNXT_ULP_TUN_ENTRY_INVALID)
first_free_entry = i;
continue;
}
/* match on the destination ip of the tunnel */
if ((use_ipv4 && !memcmp(&tun_tbl[i].t_dst_ip,
params->hdr_field[dip_idx].spec,
sizeof(rte_be32_t))) ||
(!use_ipv4 &&
!memcmp(tun_tbl[i].t_dst_ip6,
params->hdr_field[dip_idx].spec,
sizeof(((struct bnxt_tun_cache_entry *)
NULL)->t_dst_ip6)))) {
*tun_entry = &tun_tbl[i];
*tun_idx = i;
return 0;
}
}
if (first_free_entry == BNXT_ULP_TUN_ENTRY_INVALID) {
BNXT_DRV_DBG(ERR,
"Error: No entry available in tunnel table\n");
return BNXT_TF_RC_ERROR;
}
*tun_idx = first_free_entry;
*tun_entry = &tun_tbl[first_free_entry];
tun_tbl[first_free_entry].t_dst_ip_valid = true;
/* Update the destination ip and mac */
if (use_ipv4)
memcpy(&tun_tbl[first_free_entry].t_dst_ip,
params->hdr_field[dip_idx].spec, sizeof(rte_be32_t));
else
memcpy(tun_tbl[first_free_entry].t_dst_ip6,
params->hdr_field[dip_idx].spec,
sizeof(((struct bnxt_tun_cache_entry *)
NULL)->t_dst_ip6));
memcpy(tun_tbl[first_free_entry].t_dmac,
params->hdr_field[dmac_idx].spec, RTE_ETHER_ADDR_LEN);
return 0;
}
/* Tunnel API to delete the tunnel entry */
void
ulp_tunnel_offload_entry_clear(struct bnxt_tun_cache_entry *tun_tbl,
uint8_t tun_idx)
{
memset(&tun_tbl[tun_idx], 0, sizeof(struct bnxt_tun_cache_entry));
}
/* Tunnel API to perform tunnel offload process when there is F1/F2 flows */
int32_t
ulp_tunnel_offload_process(struct ulp_rte_parser_params *params)
{
struct bnxt_tun_cache_entry *tun_entry;
uint16_t tun_idx;
int32_t rc = BNXT_TF_RC_SUCCESS;
/* Perform the tunnel offload only for F1 and F2 flows */
if (!ULP_BITMAP_ISSET(params->hdr_bitmap.bits,
BNXT_ULP_HDR_BIT_F1) &&
!ULP_BITMAP_ISSET(params->hdr_bitmap.bits,
BNXT_ULP_HDR_BIT_F2))
return rc;
/* search for the tunnel entry if not found create one */
rc = ulp_get_tun_entry(params, &tun_entry, &tun_idx);
if (rc == BNXT_TF_RC_ERROR)
return rc;
/* Tunnel offload for the outer Tunnel flow */
if (ULP_BITMAP_ISSET(params->hdr_bitmap.bits,
BNXT_ULP_HDR_BIT_F1)) {
/* Reset the JUMP action bit in the action bitmap as we don't
* offload this action.
*/
ULP_BITMAP_RESET(params->act_bitmap.bits,
BNXT_ULP_ACT_BIT_JUMP);
params->parent_flow = true;
params->tun_idx = tun_idx;
tun_entry->outer_tun_flow_id = params->fid;
} else if (ULP_BITMAP_ISSET(params->hdr_bitmap.bits,
BNXT_ULP_HDR_BIT_F2)) {
/* add the vxlan decap action for F2 flows */
ULP_BITMAP_SET(params->act_bitmap.bits,
BNXT_ULP_ACT_BIT_VXLAN_DECAP);
params->child_flow = true;
params->tun_idx = tun_idx;
params->parent_flow = false;
}
ULP_COMP_FLD_IDX_WR(params, BNXT_ULP_CF_IDX_TUNNEL_ID, tun_idx);
return rc;
}
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