[qca-nss-drv]: adding sjack support to NSS.
Adding sjack support in NSS.
CRs-Fixed: 739496
Change-Id: I379c95c30eb27dc40d2715656822b56d4b54bf9a
Signed-off-by: Ankit Dhanuka <adhanuka@codeaurora.org>
diff --git a/nss_sjack.c b/nss_sjack.c
new file mode 100644
index 0000000..41273a3
--- /dev/null
+++ b/nss_sjack.c
@@ -0,0 +1,176 @@
+/*
+ **************************************************************************
+ * 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.
+ **************************************************************************
+ */
+
+#include "nss_tx_rx_common.h"
+
+/*
+ * nss_sjack_handler()
+ * Handle NSS -> HLOS messages for sjack
+ */
+static void nss_sjack_handler(struct nss_ctx_instance *nss_ctx, struct nss_cmn_msg *ncm,
+ __attribute__((unused))void *app_data)
+{
+ void *ctx;
+ nss_sjack_msg_callback_t cb;
+
+ BUG_ON(ncm->interface != NSS_SJACK_INTERFACE);
+
+ /*
+ * Is this a valid request/response packet?
+ */
+ if (ncm->type >= NSS_SJACK_MAX_MSG_TYPE) {
+ nss_warning("%p: received invalid message %d for sjack interface", nss_ctx, ncm->type);
+ return;
+ }
+
+ if (ncm->len > sizeof(struct nss_sjack_msg)) {
+ nss_warning("%p: tx request for another interface: %d", nss_ctx, ncm->interface);
+ return;
+ }
+
+ /*
+ * Update the callback and app_data for NOTIFY messages, sjack sends all notify messages
+ * to the same callback/app_data.
+ */
+ if (ncm->response == NSS_CMM_RESPONSE_NOTIFY) {
+ ncm->cb = (uint32_t)nss_ctx->nss_top->if_rx_msg_callback[ncm->interface];
+ }
+
+ /*
+ * Log failures
+ */
+ nss_core_log_msg_failures(nss_ctx, ncm);
+
+ /*
+ * Do we have a call back
+ */
+ if (!ncm->cb) {
+ return;
+ }
+
+ /*
+ * callback
+ */
+ cb = (nss_sjack_msg_callback_t)ncm->cb;
+ ctx = nss_ctx->nss_top->if_ctx[ncm->interface];
+
+ cb(ctx, ncm);
+}
+
+
+/*
+ * nss_sjack_tx_msg()
+ * Transmit a sjack message to NSSFW
+ */
+nss_tx_status_t nss_sjack_tx_msg(struct nss_ctx_instance *nss_ctx, struct nss_sjack_msg *msg)
+{
+ struct nss_sjack_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: sjack msg dropped as core not ready", nss_ctx);
+ return NSS_TX_FAILURE_NOT_READY;
+ }
+
+ /*
+ * Sanity check the message
+ */
+ if (ncm->interface != NSS_SJACK_INTERFACE) {
+ nss_warning("%p: tx request for another interface: %d", nss_ctx, ncm->interface);
+ return NSS_TX_FAILURE;
+ }
+
+ if (ncm->type > NSS_SJACK_MAX_MSG_TYPE) {
+ nss_warning("%p: message type out of range: %d", nss_ctx, ncm->type);
+ return NSS_TX_FAILURE;
+ }
+
+ if (ncm->len > sizeof(struct nss_sjack_msg)) {
+ nss_warning("%p: message length is invalid: %d", nss_ctx, ncm->len);
+ return NSS_TX_FAILURE;
+ }
+
+ 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: msg dropped as command allocation failed", nss_ctx);
+ return NSS_TX_FAILURE;
+ }
+
+ /*
+ * Copy the message to our skb
+ */
+ nm = (struct nss_sjack_msg *)skb_put(nbuf, sizeof(struct nss_sjack_msg));
+ memcpy(nm, msg, sizeof(struct nss_sjack_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 'sjack message' \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;
+}
+
+/*
+ * nss_sjack_register_if()
+ */
+struct nss_ctx_instance *nss_sjack_register_if(uint32_t if_num, struct net_device *netdev,
+ nss_sjack_msg_callback_t event_callback)
+{
+ nss_assert(if_num == NSS_SJACK_INTERFACE);
+
+ nss_top_main.if_ctx[if_num] = netdev;
+ nss_top_main.if_rx_msg_callback[if_num] = event_callback;
+
+ return (struct nss_ctx_instance *)&nss_top_main.nss[nss_top_main.sjack_handler_id];
+}
+
+/*
+ * nss_sjack_unregister_if()
+ */
+void nss_sjack_unregister_if(uint32_t if_num)
+{
+ nss_assert(if_num == NSS_SJACK_INTERFACE);
+
+ nss_top_main.if_ctx[if_num] = NULL;
+ nss_top_main.if_rx_msg_callback[if_num] = NULL;
+
+ return;
+}
+
+/*
+ * nss_sjack_register_handler()
+ * Registering handler for sending msg to sjack node on NSS.
+ */
+void nss_sjack_register_handler(void)
+{
+ nss_core_register_handler(NSS_SJACK_INTERFACE, nss_sjack_handler, NULL);
+}
+
+EXPORT_SYMBOL(nss_sjack_register_if);
+EXPORT_SYMBOL(nss_sjack_unregister_if);
+EXPORT_SYMBOL(nss_sjack_tx_msg);