[qca-nss-drv] Add support for standard VxLAN
NSS Driver changes for VxLAN support.
Change-Id: I2f3ef6a05092f5d1cb717b2a5b40b83df00329cf
Signed-off-by: Cemil Coskun <ccoskun@codeaurora.org>
Signed-off-by: Apoorv Gupta <apoogupt@codeaurora.org>
diff --git a/nss_vxlan.c b/nss_vxlan.c
new file mode 100644
index 0000000..d8174de
--- /dev/null
+++ b/nss_vxlan.c
@@ -0,0 +1,320 @@
+/*
+ **************************************************************************
+ * Copyright (c) 2019, 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_vxlan.c
+ * NSS VxLAN driver interface APIs
+ */
+#include "nss_core.h"
+#include "nss_vxlan.h"
+#include "nss_cmn.h"
+#include "nss_tx_rx_common.h"
+#include "nss_vxlan_log.h"
+#include "nss_vxlan_stats.h"
+
+#define NSS_VXLAN_TX_TIMEOUT 3000
+
+/*
+ * Private data structure
+ */
+static struct {
+ struct semaphore sem; /* Semaphore structure. */
+ struct completion complete; /* Completion structure. */
+ int response; /* Response from FW. */
+ void *cb; /* Original cb for msgs. */
+ void *app_data; /* Original app_data for msgs. */
+} nss_vxlan_pvt;
+
+/*
+ * nss_vxlan_verify_if_num()
+ * Verify if_num passed to us.
+ */
+static bool nss_vxlan_verify_if_num(uint32_t if_num)
+{
+ uint32_t type;
+
+ if (if_num == NSS_VXLAN_INTERFACE) {
+ return true;
+ }
+
+ type = nss_dynamic_interface_get_type(nss_vxlan_get_ctx(), if_num);
+
+ return ((type == NSS_DYNAMIC_INTERFACE_TYPE_VXLAN_INNER) ||
+ (type == NSS_DYNAMIC_INTERFACE_TYPE_VXLAN_OUTER));
+}
+
+/*
+ * nss_vxlan_callback()
+ * Callback to handle the completion of NSS->HLOS messages.
+ */
+static void nss_vxlan_callback(void *app_data, struct nss_cmn_msg *msg)
+{
+ nss_vxlan_msg_callback_t callback = (nss_vxlan_msg_callback_t)nss_vxlan_pvt.cb;
+ void *data = nss_vxlan_pvt.app_data;
+
+ nss_vxlan_pvt.response = NSS_TX_SUCCESS;
+ nss_vxlan_pvt.cb = NULL;
+ nss_vxlan_pvt.app_data = NULL;
+
+ if (msg->response != NSS_CMN_RESPONSE_ACK) {
+ nss_warning("Vxlan Error response %d\n", msg->response);
+ nss_vxlan_pvt.response = NSS_TX_FAILURE;
+ }
+
+ if (callback) {
+ callback(data, msg);
+ }
+ complete(&nss_vxlan_pvt.complete);
+}
+
+/*
+ * nss_vxlan_handler()
+ * Handle NSS -> HLOS messages for vxlan.
+ */
+static void nss_vxlan_msg_handler(struct nss_ctx_instance *nss_ctx, struct nss_cmn_msg *ncm, __attribute__((unused))void *app_data)
+{
+ struct nss_vxlan_msg *nvm = (struct nss_vxlan_msg *)ncm;
+ nss_vxlan_msg_callback_t cb;
+
+ BUG_ON(!nss_vxlan_verify_if_num(ncm->interface));
+
+ /*
+ * Is this a valid request/response packet?
+ */
+ if (ncm->type >= NSS_VXLAN_MSG_TYPE_MAX) {
+ nss_warning("%p: received invalid message %d for vxlan interface", nss_ctx, ncm->type);
+ return;
+ }
+
+ if (nss_cmn_get_msg_len(ncm) > sizeof(struct nss_vxlan_msg)) {
+ nss_warning("%p: Length of message is greater than required: %d", nss_ctx, nss_cmn_get_msg_len(ncm));
+ return;
+ }
+
+ /*
+ * Log messages.
+ */
+ nss_core_log_msg_failures(nss_ctx, ncm);
+ nss_vxlan_log_rx_msg(nvm);
+
+ switch (nvm->cm.type) {
+ case NSS_VXLAN_MSG_TYPE_STATS_SYNC:
+ /*
+ * Update common node statistics
+ */
+ nss_vxlan_stats_sync(nss_ctx, nvm);
+ }
+
+ /*
+ * Update the callback for NOTIFY messages
+ */
+ if (ncm->response == NSS_CMN_RESPONSE_NOTIFY) {
+ ncm->cb = (nss_ptr_t)nss_ctx->nss_top->if_rx_msg_callback[ncm->interface];
+ }
+
+ cb = (nss_vxlan_msg_callback_t)ncm->cb;
+
+ /*
+ * Do we have a callback?
+ */
+ if (!cb) {
+ nss_trace("%p: cb is null for interface %d\n", nss_ctx, ncm->interface);
+ return;
+ }
+
+ cb((void *)nss_ctx->subsys_dp_register[ncm->interface].ndev, ncm);
+}
+
+/*
+ * nss_vxlan_tx_msg()
+ * Transmit a vxlan message to NSS FW. Don't call this from softirq/interrupts.
+ */
+nss_tx_status_t nss_vxlan_tx_msg(struct nss_ctx_instance *nss_ctx, struct nss_vxlan_msg *nvm)
+{
+ struct nss_cmn_msg *ncm = &nvm->cm;
+
+ if (!nss_vxlan_verify_if_num(ncm->interface)) {
+ nss_warning("%p: wrong interface number %u\n", nss_ctx, nvm->cm.interface);
+ return NSS_TX_FAILURE_BAD_PARAM;
+ }
+
+ if (ncm->type >= NSS_VXLAN_MSG_TYPE_MAX) {
+ nss_warning("%p: wrong message type %u\n", nss_ctx, ncm->type);
+ return NSS_TX_FAILURE_BAD_PARAM;
+ }
+
+ /*
+ * Trace messages.
+ */
+ nss_vxlan_log_tx_msg(nvm);
+
+ return nss_core_send_cmd(nss_ctx, nvm, sizeof(*nvm), NSS_NBUF_PAYLOAD_SIZE);
+}
+EXPORT_SYMBOL(nss_vxlan_tx_msg);
+
+/*
+ * nss_vxlan_tx_msg_sync()
+ * Transmit a vxlan message to NSS firmware synchronously.
+ */
+nss_tx_status_t nss_vxlan_tx_msg_sync(struct nss_ctx_instance *nss_ctx, struct nss_vxlan_msg *nvm)
+{
+ nss_tx_status_t status;
+ int ret;
+
+ down(&nss_vxlan_pvt.sem);
+ nss_vxlan_pvt.cb = (void *)nvm->cm.cb;
+ nss_vxlan_pvt.app_data = (void *)nvm->cm.app_data;
+
+ nvm->cm.cb = (nss_ptr_t)nss_vxlan_callback;
+ nvm->cm.app_data = (nss_ptr_t)NULL;
+
+ status = nss_vxlan_tx_msg(nss_ctx, nvm);
+ if (status != NSS_TX_SUCCESS) {
+ nss_warning("%p: vxlan_tx_msg failed\n", nss_ctx);
+ up(&nss_vxlan_pvt.sem);
+ return status;
+ }
+
+ ret = wait_for_completion_timeout(&nss_vxlan_pvt.complete, msecs_to_jiffies(NSS_VXLAN_TX_TIMEOUT));
+ if (!ret) {
+ nss_warning("%p: vxlan tx sync failed due to timeout\n", nss_ctx);
+ nss_vxlan_pvt.response = NSS_TX_FAILURE;
+ }
+
+ status = nss_vxlan_pvt.response;
+ up(&nss_vxlan_pvt.sem);
+ return status;
+}
+EXPORT_SYMBOL(nss_vxlan_tx_msg_sync);
+
+/*
+ * nss_vxlan_msg_init()
+ * Initialize VxLAN message.
+ */
+void nss_vxlan_msg_init(struct nss_vxlan_msg *nvm, uint16_t if_num, uint32_t type, uint32_t len,
+ nss_vxlan_msg_callback_t cb, void *app_data)
+{
+ nss_cmn_msg_init(&nvm->cm, if_num, type, len, (void*)cb, app_data);
+}
+EXPORT_SYMBOL(nss_vxlan_msg_init);
+
+/*
+ * nss_vxlan_unregister_if()
+ * Unregister a data packet notifier with NSS FW.
+ */
+bool nss_vxlan_unregister_if(uint32_t if_num)
+{
+ struct nss_ctx_instance *nss_ctx;
+
+ nss_ctx = nss_vxlan_get_ctx();
+ if (!nss_vxlan_verify_if_num(if_num)) {
+ nss_warning("%p: data unregister received for invalid interface %d", nss_ctx, if_num);
+ return false;
+ }
+
+ nss_core_unregister_handler(nss_ctx, if_num);
+ nss_core_unregister_subsys_dp(nss_ctx, if_num);
+ return true;
+}
+EXPORT_SYMBOL(nss_vxlan_unregister_if);
+
+/*
+ * nss_vxlan_register_if()
+ * Registers a data packet notifier with NSS FW.
+ */
+struct nss_ctx_instance *nss_vxlan_register_if(uint32_t if_num,
+ uint32_t type,
+ nss_vxlan_buf_callback_t data_cb,
+ nss_vxlan_msg_callback_t notify_cb,
+ struct net_device *netdev,
+ uint32_t features)
+{
+ struct nss_ctx_instance *nss_ctx;
+ int core_status;
+
+ nss_ctx = nss_vxlan_get_ctx();
+ if (!nss_vxlan_verify_if_num(if_num)) {
+ nss_warning("%p: data register received for invalid interface %d", nss_ctx, if_num);
+ return NULL;
+ }
+
+ core_status = nss_core_register_handler(nss_ctx, if_num, nss_vxlan_msg_handler, NULL);
+ if (core_status != NSS_CORE_STATUS_SUCCESS) {
+ nss_warning("%p: nss core register handler failed for if_num:%d with error :%d", nss_ctx, if_num, core_status);
+ return NULL;
+ }
+
+ nss_core_register_subsys_dp(nss_ctx, if_num, data_cb, NULL, NULL, netdev, features);
+ nss_core_set_subsys_dp_type(nss_ctx, netdev, if_num, type);
+ nss_top_main.if_rx_msg_callback[if_num] = (nss_if_rx_msg_callback_t)notify_cb;
+ return nss_ctx;
+}
+EXPORT_SYMBOL(nss_vxlan_register_if);
+
+/*
+ * nss_vxlan_ifnum_with_core_id()
+ * Append core id to vxlan interface num.
+ */
+int nss_vxlan_ifnum_with_core_id(int if_num)
+{
+ struct nss_ctx_instance *nss_ctx = nss_vxlan_get_ctx();
+
+ NSS_VERIFY_CTX_MAGIC(nss_ctx);
+
+ if (!nss_vxlan_verify_if_num(if_num)) {
+ nss_warning("%p: Invalid if_num: %d, must be a dynamic interface\n", nss_ctx, if_num);
+ return 0;
+ }
+ return NSS_INTERFACE_NUM_APPEND_COREID(nss_ctx, if_num);
+}
+EXPORT_SYMBOL(nss_vxlan_ifnum_with_core_id);
+
+/*
+ * nss_vxlan_get_ctx()
+ * Return a VxLAN NSS context.
+ */
+struct nss_ctx_instance *nss_vxlan_get_ctx()
+{
+ struct nss_ctx_instance *nss_ctx;
+
+ nss_ctx = &nss_top_main.nss[nss_top_main.vxlan_handler_id];
+ return nss_ctx;
+}
+EXPORT_SYMBOL(nss_vxlan_get_ctx);
+
+/*
+ * nss_vxlan_init()
+ * Initializes Vxlan. Gets called from nss_init.c.
+ */
+void nss_vxlan_init()
+{
+ uint32_t core_status;
+ struct nss_ctx_instance *nss_ctx = nss_vxlan_get_ctx();
+ if (!nss_ctx) {
+ nss_warning("%p: VxLAN is not registered", nss_ctx);
+ return;
+ }
+
+ nss_vxlan_stats_dentry_create();
+ sema_init(&nss_vxlan_pvt.sem, 1);
+ init_completion(&nss_vxlan_pvt.complete);
+ core_status = nss_core_register_handler(nss_ctx, NSS_VXLAN_INTERFACE, nss_vxlan_msg_handler, NULL);
+
+ if (core_status != NSS_CORE_STATUS_SUCCESS) {
+ nss_warning("%p: nss core register handler failed for if_num:%d with error :%d", nss_ctx, NSS_VXLAN_INTERFACE, core_status);
+ }
+
+}