blob: 09d4875549c237536ce77855bcc9fe627214e09f [file] [log] [blame]
/*
**************************************************************************
* Copyright (c) 2016-2017, 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.
**************************************************************************
*/
#include "nss_tx_rx_common.h"
#define NSS_BRIDGE_TX_TIMEOUT 1000 /* 1 Second */
/*
* Private data structure
*/
static struct nss_bridge_pvt {
struct semaphore sem;
struct completion complete;
int response;
void *cb;
void *app_data;
} bridge_pvt;
/*
* nss_bridge_handler()
* Handle NSS -> HLOS messages for bridge
*/
static void nss_bridge_handler(struct nss_ctx_instance *nss_ctx, struct nss_cmn_msg *ncm, void *app_data)
{
struct nss_bridge_msg *nbm = (struct nss_bridge_msg *)ncm;
nss_bridge_msg_callback_t cb;
BUG_ON(!nss_is_dynamic_interface(ncm->interface));
/*
* Is this a valid request/response packet?
*/
if (ncm->type >= NSS_BRIDGE_MSG_TYPE_MAX) {
nss_warning("%p: received invalid message %d for bridge interface", nss_ctx, ncm->type);
return;
}
if (nss_cmn_get_msg_len(ncm) > sizeof(struct nss_bridge_msg)) {
nss_warning("%p: length of message is greater than required: %d", nss_ctx, nss_cmn_get_msg_len(ncm));
return;
}
/*
* Log failures
*/
nss_core_log_msg_failures(nss_ctx, ncm);
/*
* Update the callback and app_data for NOTIFY messages, IPv4 sends all notify messages
* to the same callback/app_data.
*/
if (ncm->response == NSS_CMM_RESPONSE_NOTIFY) {
ncm->cb = (nss_ptr_t)nss_ctx->nss_top->bridge_callback;
ncm->app_data = (nss_ptr_t)nss_ctx->nss_top->bridge_ctx;
}
/*
* Do we have a call back
*/
if (!ncm->cb) {
return;
}
/*
* callback
*/
cb = (nss_bridge_msg_callback_t)ncm->cb;
cb((void *)ncm->app_data, nbm);
}
/*
* nss_bridge_verify_if_num()
* Verify if_num passed to us.
*/
static bool nss_bridge_verify_if_num(uint32_t if_num)
{
if (nss_is_dynamic_interface(if_num) == false) {
return false;
}
if (nss_dynamic_interface_get_type(if_num) != NSS_DYNAMIC_INTERFACE_TYPE_BRIDGE) {
return false;
}
return true;
}
/*
* nss_bridge_callback()
* Callback to handle the completion of NSS->HLOS messages.
*/
static void nss_bridge_callback(void *app_data, struct nss_bridge_msg *nbm)
{
nss_bridge_msg_callback_t callback = (nss_bridge_msg_callback_t)bridge_pvt.cb;
void *data = bridge_pvt.app_data;
bridge_pvt.response = NSS_TX_SUCCESS;
bridge_pvt.cb = NULL;
bridge_pvt.app_data = NULL;
if (nbm->cm.response != NSS_CMN_RESPONSE_ACK) {
nss_warning("bridge error response %d\n", nbm->cm.response);
bridge_pvt.response = nbm->cm.response;
}
if (callback) {
callback(data, nbm);
}
complete(&bridge_pvt.complete);
}
/*
* nss_bridge_tx_msg()
* Transmit a bridge message to NSSFW
*/
nss_tx_status_t nss_bridge_tx_msg(struct nss_ctx_instance *nss_ctx, struct nss_bridge_msg *msg)
{
struct nss_bridge_msg *nm;
struct nss_cmn_msg *ncm = &msg->cm;
struct sk_buff *nbuf;
int32_t status;
NSS_VERIFY_CTX_MAGIC(nss_ctx);
if (unlikely(nss_ctx->state != NSS_CORE_STATE_INITIALIZED)) {
nss_warning("%p: bridge msg dropped as core not ready", nss_ctx);
return NSS_TX_FAILURE_NOT_READY;
}
/*
* Sanity check the message
*/
if (!nss_is_dynamic_interface(ncm->interface)) {
nss_warning("%p: tx request for interface that is not a bridge: %d", nss_ctx, ncm->interface);
return NSS_TX_FAILURE;
}
if (ncm->type >= NSS_BRIDGE_MSG_TYPE_MAX) {
nss_warning("%p: message type out of range: %d", nss_ctx, ncm->type);
return NSS_TX_FAILURE;
}
if (nss_cmn_get_msg_len(ncm) > sizeof(struct nss_bridge_msg)) {
nss_warning("%p: message length is invalid: %d", nss_ctx, nss_cmn_get_msg_len(ncm));
return NSS_TX_FAILURE;
}
nbuf = dev_alloc_skb(NSS_NBUF_PAYLOAD_SIZE);
if (unlikely(!nbuf)) {
NSS_PKT_STATS_INCREMENT(nss_ctx, &nss_ctx->nss_top->stats_drv[NSS_STATS_DRV_NBUF_ALLOC_FAILS]);
nss_warning("%p: msg dropped as command allocation failed", nss_ctx);
return NSS_TX_FAILURE;
}
/*
* Copy the message to our skb
*/
nm = (struct nss_bridge_msg *)skb_put(nbuf, sizeof(struct nss_bridge_msg));
memcpy(nm, msg, sizeof(struct nss_bridge_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 'bridge message'", nss_ctx);
return NSS_TX_FAILURE;
}
nss_hal_send_interrupt(nss_ctx, NSS_H2N_INTR_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_bridge_tx_msg);
/*
* nss_bridge_tx_msg_sync()
* Transmit a bridge message to NSS firmware synchronously.
*/
nss_tx_status_t nss_bridge_tx_msg_sync(struct nss_ctx_instance *nss_ctx, struct nss_bridge_msg *nbm)
{
nss_tx_status_t status;
int ret = 0;
down(&bridge_pvt.sem);
bridge_pvt.cb = (void *)nbm->cm.cb;
bridge_pvt.app_data = (void *)nbm->cm.app_data;
nbm->cm.cb = (nss_ptr_t)nss_bridge_callback;
nbm->cm.app_data = (nss_ptr_t)NULL;
status = nss_bridge_tx_msg(nss_ctx, nbm);
if (status != NSS_TX_SUCCESS) {
nss_warning("%p: bridge_tx_msg failed\n", nss_ctx);
up(&bridge_pvt.sem);
return status;
}
ret = wait_for_completion_timeout(&bridge_pvt.complete, msecs_to_jiffies(NSS_BRIDGE_TX_TIMEOUT));
if (!ret) {
nss_warning("%p: bridge msg tx failed due to timeout\n", nss_ctx);
bridge_pvt.response = NSS_TX_FAILURE;
}
status = bridge_pvt.response;
up(&bridge_pvt.sem);
return status;
}
EXPORT_SYMBOL(nss_bridge_tx_msg_sync);
/*
* nss_bridge_get_context()
*/
struct nss_ctx_instance *nss_bridge_get_context(void)
{
return (struct nss_ctx_instance *)&nss_top_main.nss[nss_top_main.bridge_handler_id];
}
EXPORT_SYMBOL(nss_bridge_get_context);
/*
* nss_bridge_msg_init()
* Initialize nss_bridge_msg.
*/
void nss_bridge_msg_init(struct nss_bridge_msg *ncm, uint16_t if_num, uint32_t type, uint32_t len, void *cb, void *app_data)
{
nss_cmn_msg_init(&ncm->cm, if_num, type, len, cb, app_data);
}
EXPORT_SYMBOL(nss_bridge_msg_init);
/*
* nss_bridge_tx_vsi_assign_msg
* API to send vsi assign message to NSS FW
*/
nss_tx_status_t nss_bridge_tx_vsi_assign_msg(uint32_t if_num, uint32_t vsi)
{
struct nss_ctx_instance *nss_ctx = nss_bridge_get_context();
struct nss_bridge_msg nbm;
if (!nss_ctx) {
nss_warning("Can't get nss context\n");
return NSS_TX_FAILURE;
}
if (nss_bridge_verify_if_num(if_num) == false) {
nss_warning("%p: invalid interface %d", nss_ctx, if_num);
return NSS_TX_FAILURE;
}
nss_bridge_msg_init(&nbm, if_num, NSS_IF_VSI_ASSIGN,
sizeof(struct nss_if_vsi_assign), NULL, NULL);
nbm.msg.if_msg.vsi_assign.vsi = vsi;
return nss_bridge_tx_msg_sync(nss_ctx, &nbm);
}
EXPORT_SYMBOL(nss_bridge_tx_vsi_assign_msg);
/*
* nss_bridge_tx_vsi_unassign_msg
* API to send vsi unassign message to NSS FW
*/
nss_tx_status_t nss_bridge_tx_vsi_unassign_msg(uint32_t if_num, uint32_t vsi)
{
struct nss_ctx_instance *nss_ctx = nss_bridge_get_context();
struct nss_bridge_msg nbm;
if (!nss_ctx) {
nss_warning("Can't get nss context\n");
return NSS_TX_FAILURE;
}
if (nss_bridge_verify_if_num(if_num) == false) {
nss_warning("%p: invalid interface %d", nss_ctx, if_num);
return NSS_TX_FAILURE;
}
nss_bridge_msg_init(&nbm, if_num, NSS_IF_VSI_UNASSIGN,
sizeof(struct nss_if_vsi_unassign), NULL, NULL);
nbm.msg.if_msg.vsi_unassign.vsi = vsi;
return nss_bridge_tx_msg_sync(nss_ctx, &nbm);
}
EXPORT_SYMBOL(nss_bridge_tx_vsi_unassign_msg);
/*
* nss_bridge_tx_change_mtu_msg
* API to send change mtu message to NSS FW
*/
nss_tx_status_t nss_bridge_tx_set_mtu_msg(uint32_t bridge_if_num, uint32_t mtu)
{
struct nss_ctx_instance *nss_ctx = nss_bridge_get_context();
struct nss_bridge_msg nbm;
struct nss_if_mtu_change *nimc;
if (!nss_ctx) {
nss_warning("Can't get nss context\n");
return NSS_TX_FAILURE;
}
if (nss_bridge_verify_if_num(bridge_if_num) == false) {
nss_warning("%p: received invalid interface %d", nss_ctx, bridge_if_num);
return NSS_TX_FAILURE;
}
nss_bridge_msg_init(&nbm, bridge_if_num, NSS_IF_MTU_CHANGE,
sizeof(struct nss_if_mtu_change), NULL, NULL);
nimc = &nbm.msg.if_msg.mtu_change;
nimc->min_buf_size = (uint16_t)mtu;
return nss_bridge_tx_msg_sync(nss_ctx, &nbm);
}
EXPORT_SYMBOL(nss_bridge_tx_set_mtu_msg);
/*
* nss_bridge_tx_set_mac_addr_msg
* API to send change mac addr message to NSS FW
*/
nss_tx_status_t nss_bridge_tx_set_mac_addr_msg(uint32_t bridge_if_num, uint8_t *addr)
{
struct nss_ctx_instance *nss_ctx = nss_bridge_get_context();
struct nss_bridge_msg nbm;
struct nss_if_mac_address_set *nmas;
if (!nss_ctx) {
nss_warning("Can't get nss context\n");
return NSS_TX_FAILURE;
}
if (nss_bridge_verify_if_num(bridge_if_num) == false) {
nss_warning("%p: received invalid interface %d", nss_ctx, bridge_if_num);
return NSS_TX_FAILURE;
}
nss_bridge_msg_init(&nbm, bridge_if_num, NSS_IF_MAC_ADDR_SET,
sizeof(struct nss_if_mac_address_set), NULL, NULL);
nmas = &nbm.msg.if_msg.mac_address_set;
memcpy(nmas->mac_addr, addr, ETH_ALEN);
return nss_bridge_tx_msg_sync(nss_ctx, &nbm);
}
EXPORT_SYMBOL(nss_bridge_tx_set_mac_addr_msg);
/*
* nss_bridge_tx_join_msg
* API to send slave join message to NSS FW
*/
nss_tx_status_t nss_bridge_tx_join_msg(uint32_t bridge_if_num, struct net_device *netdev)
{
struct nss_ctx_instance *nss_ctx = nss_bridge_get_context();
struct nss_bridge_msg nbm;
uint32_t slave_if_num;
if (!nss_ctx) {
nss_warning("Can't get nss context\n");
return NSS_TX_FAILURE;
}
if (nss_bridge_verify_if_num(bridge_if_num) == false) {
nss_warning("%p: received invalid interface %d\n", nss_ctx, bridge_if_num);
return NSS_TX_FAILURE;
}
slave_if_num = nss_cmn_get_interface_number_by_dev(netdev);
if (slave_if_num < 0) {
nss_warning("%p: invalid slave device %p\n", nss_ctx, netdev);
return NSS_TX_FAILURE;
}
nbm.msg.br_join.if_num = slave_if_num;
nss_bridge_msg_init(&nbm, bridge_if_num, NSS_BRIDGE_MSG_JOIN,
sizeof(struct nss_bridge_join_msg), NULL, NULL);
return nss_bridge_tx_msg_sync(nss_ctx, &nbm);
}
EXPORT_SYMBOL(nss_bridge_tx_join_msg);
/*
* nss_bridge_tx_leave_msg
* API to send slave leave message to NSS FW
*/
nss_tx_status_t nss_bridge_tx_leave_msg(uint32_t bridge_if_num, struct net_device *netdev)
{
struct nss_ctx_instance *nss_ctx = nss_bridge_get_context();
struct nss_bridge_msg nbm;
uint32_t slave_if_num;
if (!nss_ctx) {
nss_warning("Can't get nss context\n");
return NSS_TX_FAILURE;
}
if (nss_bridge_verify_if_num(bridge_if_num) == false) {
nss_warning("%p: received invalid interface %d\n", nss_ctx, bridge_if_num);
return NSS_TX_FAILURE;
}
slave_if_num = nss_cmn_get_interface_number_by_dev(netdev);
if (slave_if_num < 0) {
nss_warning("%p: invalid slave device %p\n", nss_ctx, netdev);
return NSS_TX_FAILURE;
}
nbm.msg.br_leave.if_num = slave_if_num;
nss_bridge_msg_init(&nbm, bridge_if_num, NSS_BRIDGE_MSG_LEAVE,
sizeof(struct nss_bridge_leave_msg), NULL, NULL);
return nss_bridge_tx_msg_sync(nss_ctx, &nbm);
}
EXPORT_SYMBOL(nss_bridge_tx_leave_msg);
/*
* nss_bridge_init()
*/
void nss_bridge_init(void)
{
sema_init(&bridge_pvt.sem, 1);
init_completion(&bridge_pvt.complete);
}
/*
* nss_bridge_unregister()
*/
void nss_bridge_unregister(uint16_t if_num)
{
nss_core_unregister_handler(if_num);
}
EXPORT_SYMBOL(nss_bridge_unregister);
/*
* nss_bridge_register()
*/
struct nss_ctx_instance *nss_bridge_register(uint16_t if_num)
{
nss_core_register_handler(if_num, nss_bridge_handler, NULL);
return nss_bridge_get_context();
}
EXPORT_SYMBOL(nss_bridge_register);
/*
* nss_bridge_notify_register()
* Register to receive bridge notify messages.
*/
struct nss_ctx_instance *nss_bridge_notify_register(nss_bridge_msg_callback_t cb, void *app_data)
{
nss_top_main.bridge_callback = cb;
nss_top_main.bridge_ctx = app_data;
return nss_bridge_get_context();
}
EXPORT_SYMBOL(nss_bridge_notify_register);
/*
* nss_bridge_notify_unregister()
* Unregister to receive bridge notify messages.
*/
void nss_bridge_notify_unregister(void)
{
nss_top_main.bridge_callback = NULL;
}
EXPORT_SYMBOL(nss_bridge_notify_unregister);