blob: 50745c8581cc63ec881466799c853ac8aa641f75 [file] [log] [blame]
/*
**************************************************************************
* Copyright (c) 2014, The Linux Foundation. All rights reserved.
* Permission to use, copy, modify, and/or distribute this software for
* any purpose with or without fee is hereby granted, provided that the
* above copyright notice and this permission notice appear in all copies.
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
**************************************************************************
*/
/*
* nss_tx_rx_lag.c
* NSS LAG Tx APIs
*/
#include <linux/if_bonding.h>
#include "nss_tx_rx_common.h"
/*
* nss_lag_tx()
* Transmit a LAG msg to the firmware.
*/
nss_tx_status_t nss_lag_tx(struct nss_ctx_instance *nss_ctx, struct nss_lag_msg *msg)
{
struct sk_buff *nbuf;
int32_t status;
struct nss_lag_msg *nm;
nss_info("%p: NSS LAG Tx\n", nss_ctx);
NSS_VERIFY_CTX_MAGIC(nss_ctx);
if (unlikely(nss_ctx->state != NSS_CORE_STATE_INITIALIZED)) {
nss_warning("%p: LAG msg dropped as core not ready", nss_ctx);
return NSS_TX_FAILURE_NOT_READY;
}
nbuf = dev_alloc_skb(NSS_NBUF_PAYLOAD_SIZE);
if (unlikely(!nbuf)) {
spin_lock_bh(&nss_ctx->nss_top->stats_lock);
nss_ctx->nss_top->stats_drv[NSS_STATS_DRV_NBUF_ALLOC_FAILS]++;
spin_unlock_bh(&nss_ctx->nss_top->stats_lock);
nss_warning("%p: LAG msg dropped as command allocation failed", nss_ctx);
return NSS_TX_FAILURE;
}
nm = (struct nss_lag_msg *)skb_put(nbuf, sizeof(struct nss_lag_msg));
memcpy(nm, msg, sizeof(struct nss_lag_msg));
status = nss_core_send_buffer(nss_ctx, 0, nbuf, NSS_IF_CMD_QUEUE, H2N_BUFFER_CTRL, 0);
if (status != NSS_CORE_STATUS_SUCCESS) {
dev_kfree_skb_any(nbuf);
nss_warning("%p: Unable to enqueue LAG msg\n", nss_ctx);
return NSS_TX_FAILURE;
}
nss_hal_send_interrupt(nss_ctx->nmap, nss_ctx->h2n_desc_rings[NSS_IF_CMD_QUEUE].desc_ring.int_bit,
NSS_REGS_H2N_INTR_STATUS_DATA_COMMAND_QUEUE);
NSS_PKT_STATS_INCREMENT(nss_ctx, &nss_ctx->nss_top->stats_drv[NSS_STATS_DRV_TX_CMD_REQ]);
return NSS_TX_SUCCESS;
}
EXPORT_SYMBOL(nss_lag_tx);
/**
* nss_register_lag_if()
*/
void *nss_register_lag_if(uint32_t if_num,
nss_lag_callback_t lag_cb,
nss_lag_event_callback_t lag_ev_cb,
struct net_device *netdev)
{
nss_assert((if_num == NSS_LAG0_INTERFACE_NUM) || (if_num == NSS_LAG1_INTERFACE_NUM));
nss_top_main.if_ctx[if_num] = netdev;
nss_top_main.if_rx_callback[if_num] = lag_cb;
nss_top_main.lag_event_callback = lag_ev_cb;
/*
* Return the NSS driver context for LAG (same as for ipv4 functions)
*/
return (void *)&nss_top_main.nss[nss_top_main.ipv4_handler_id];
}
EXPORT_SYMBOL(nss_register_lag_if);
/**
* nss_unregister_lag_if()
*/
void nss_unregister_lag_if(uint32_t if_num)
{
nss_assert((if_num == NSS_LAG0_INTERFACE_NUM) || (if_num == NSS_LAG1_INTERFACE_NUM));
nss_top_main.if_rx_callback[if_num] = NULL;
nss_top_main.if_ctx[if_num] = NULL;
nss_top_main.lag_event_callback = NULL;
}
EXPORT_SYMBOL(nss_unregister_lag_if);
/**
* nss_lag_handler()
*/
void nss_lag_handler(struct nss_ctx_instance *nss_ctx,
struct nss_cmn_msg *ncm,
void *app_data)
{
struct nss_lag_msg *lm = (struct nss_lag_msg *)ncm;
void *ctx = NULL;
nss_lag_event_callback_t cb;
BUG_ON(ncm->interface != NSS_LAG0_INTERFACE_NUM
&& ncm->interface != NSS_LAG1_INTERFACE_NUM);
if (ncm->type >= NSS_TX_METADATA_LAG_MAX) {
nss_warning("%p: received invalid message %d for LAG interface", nss_ctx, ncm->type);
return;
}
if (ncm->len > sizeof(struct nss_lag_msg)) {
nss_warning("%p: invalid length for LAG message: %d", nss_ctx, ncm->len);
return;
}
/**
* Update the callback and app_data for NOTIFY messages.
* LAG sends all notify messages to the same callback.
*/
if (ncm->response == NSS_CMM_RESPONSE_NOTIFY) {
ncm->cb = (uint32_t)nss_ctx->nss_top->lag_event_callback;
}
/**
* Log failures
*/
nss_core_log_msg_failures(nss_ctx, ncm);
/**
* Do we have a call back
*/
if (!ncm->cb) {
return;
}
/**
* callback
*/
cb = (nss_lag_event_callback_t)ncm->cb;
ctx = nss_ctx->nss_top->if_ctx[ncm->interface];
cb(ctx, lm);
}
/**
* nss_lag_register_handler()
*/
void nss_lag_register_handler(void)
{
nss_core_register_handler(NSS_LAG0_INTERFACE_NUM, nss_lag_handler, NULL);
nss_core_register_handler(NSS_LAG1_INTERFACE_NUM, nss_lag_handler, NULL);
}