[qca-nss-drv] Added PPTP Accel support
Change-Id: I93b9dbc0f7efa55a99a8ebb2e7b3f8cd96dbb4ba
Signed-off-by: Shyam Sunder <ssunde@codeaurora.org>
diff --git a/nss_pptp.c b/nss_pptp.c
new file mode 100644
index 0000000..3a6fd98
--- /dev/null
+++ b/nss_pptp.c
@@ -0,0 +1,276 @@
+/*
+ **************************************************************************
+ * Copyright (c) 2015, 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 <net/sock.h>
+#include "nss_tx_rx_common.h"
+
+/*
+ * Data structures to store pptp nss debug stats
+ */
+static DEFINE_SPINLOCK(nss_pptp_session_debug_stats_lock);
+static struct nss_stats_pptp_session_debug nss_pptp_session_debug_stats[NSS_MAX_PPTP_DYNAMIC_INTERFACES];
+
+/*
+ * nss_pptp_session_debug_stats_sync
+ * Per session debug stats for pptp
+ */
+void nss_pptp_session_debug_stats_sync(struct nss_ctx_instance *nss_ctx, struct nss_pptp_sync_session_stats_msg *stats_msg, uint16_t if_num)
+{
+ int i;
+ spin_lock_bh(&nss_pptp_session_debug_stats_lock);
+ for (i = 0; i < NSS_MAX_PPTP_DYNAMIC_INTERFACES; i++) {
+ if (nss_pptp_session_debug_stats[i].if_num == if_num) {
+ nss_pptp_session_debug_stats[i].stats[NSS_STATS_PPTP_SESSION_RX_DROPPED] += stats_msg->rx_dropped;
+ nss_pptp_session_debug_stats[i].stats[NSS_STATS_PPTP_SESSION_TX_DROPPED] += stats_msg->tx_dropped;
+ nss_pptp_session_debug_stats[i].stats[NSS_STATS_PPTP_SESSION_RX_PPP_LCP_PKTS] += stats_msg->rx_ppp_lcp_pkts;
+ nss_pptp_session_debug_stats[i].stats[NSS_STATS_PPTP_SESSION_RX_EXP_DATA_PKTS] += stats_msg->rx_exception_data_pkts;
+ break;
+ }
+ }
+ spin_unlock_bh(&nss_pptp_session_debug_stats_lock);
+}
+
+/*
+ * nss_pptp_global_session_stats_get()
+ * Get session pptp statitics.
+ */
+void nss_pptp_session_debug_stats_get(void *stats_mem)
+{
+ struct nss_stats_pptp_session_debug *stats = (struct nss_stats_pptp_session_debug *)stats_mem;
+ int i;
+
+ if (!stats) {
+ nss_warning("No memory to copy pptp session stats");
+ return;
+ }
+
+ spin_lock_bh(&nss_pptp_session_debug_stats_lock);
+ for (i = 0; i < NSS_MAX_PPTP_DYNAMIC_INTERFACES; i++) {
+ if (nss_pptp_session_debug_stats[i].valid) {
+ memcpy(stats, &nss_pptp_session_debug_stats[i], sizeof(struct nss_stats_pptp_session_debug));
+ stats++;
+ }
+ }
+ spin_unlock_bh(&nss_pptp_session_debug_stats_lock);
+}
+
+/*
+ * nss_pptp_handler()
+ * Handle NSS -> HLOS messages for pptp tunnel
+ */
+static void nss_pptp_handler(struct nss_ctx_instance *nss_ctx, struct nss_cmn_msg *ncm, __attribute__((unused))void *app_data)
+{
+ struct nss_pptp_msg *ntm = (struct nss_pptp_msg *)ncm;
+ void *ctx;
+
+ nss_pptp_msg_callback_t cb;
+
+ BUG_ON(!(nss_is_dynamic_interface(ncm->interface) || ncm->interface == NSS_PPTP_INTERFACE));
+
+ /*
+ * Is this a valid request/response packet?
+ */
+ if (ncm->type >= NSS_PPTP_MSG_MAX) {
+ nss_warning("%p: received invalid message %d for PPTP interface", nss_ctx, ncm->type);
+ return;
+ }
+
+ if (ncm->len > sizeof(struct nss_pptp_msg)) {
+ nss_warning("%p: tx request for another interface: %d", nss_ctx, ncm->interface);
+ return;
+ }
+
+ switch (ntm->cm.type) {
+
+ case NSS_PPTP_MSG_SYNC_STATS:
+ /*
+ * session debug stats embeded in session stats msg
+ */
+ nss_pptp_session_debug_stats_sync(nss_ctx, &ntm->msg.stats, ncm->interface);
+ break;
+ }
+
+ /*
+ * Update the callback and app_data for NOTIFY messages, pptp 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->pptp_msg_callback;
+ }
+
+ /*
+ * Log failures
+ */
+ nss_core_log_msg_failures(nss_ctx, ncm);
+
+ /*
+ * Do we have a call back
+ */
+ if (!ncm->cb) {
+ return;
+ }
+
+ /*
+ * callback
+ */
+ cb = (nss_pptp_msg_callback_t)ncm->cb;
+ ctx = nss_ctx->nss_top->subsys_dp_register[ncm->interface].ndev;
+
+ /*
+ * call pptp tunnel callback
+ */
+ if (!ctx) {
+ nss_warning("%p: Event received for pptp tunnel interface %d before registration", nss_ctx, ncm->interface);
+ return;
+ }
+
+ cb(ctx, ntm);
+}
+
+/*
+ * nss_pptp_tx()
+ * Transmit a pptp message to NSS firmware
+ */
+nss_tx_status_t nss_pptp_tx(struct nss_ctx_instance *nss_ctx, struct nss_pptp_msg *msg)
+{
+ struct nss_pptp_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: pptp 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 non dynamic interface: %d", nss_ctx, ncm->interface);
+ return NSS_TX_FAILURE;
+ }
+
+ if (ncm->type > NSS_PPTP_MSG_MAX) {
+ nss_warning("%p: message type out of range: %d", nss_ctx, ncm->type);
+ return NSS_TX_FAILURE;
+ }
+
+ if (ncm->len > sizeof(struct nss_pptp_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)) {
+ 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_pptp_msg *)skb_put(nbuf, sizeof(struct nss_pptp_msg));
+ memcpy(nm, msg, sizeof(struct nss_pptp_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 'pptp message'\n", nss_ctx);
+ if (status == NSS_CORE_STATUS_FAILURE_QUEUE) {
+ return NSS_TX_FAILURE_QUEUE;
+ }
+ 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_register_pptp_if()
+ */
+struct nss_ctx_instance *nss_register_pptp_if(uint32_t if_num, nss_pptp_callback_t pptp_callback,
+ nss_pptp_msg_callback_t event_callback, struct net_device *netdev, uint32_t features)
+{
+
+ nss_assert(nss_is_dynamic_interface(if_num));
+
+ nss_top_main.subsys_dp_register[if_num].ndev = netdev;
+ nss_top_main.subsys_dp_register[if_num].cb = pptp_callback;
+ nss_top_main.subsys_dp_register[if_num].app_data = NULL;
+ nss_top_main.subsys_dp_register[if_num].features = features;
+
+ nss_top_main.pptp_msg_callback = event_callback;
+
+ nss_core_register_handler(if_num, nss_pptp_handler, NULL);
+
+ return (struct nss_ctx_instance *)&nss_top_main.nss[nss_top_main.pptp_handler_id];
+}
+
+/*
+ * nss_unregister_pptp_if()
+ */
+void nss_unregister_pptp_if(uint32_t if_num)
+{
+ nss_assert(nss_is_dynamic_interface(if_num));
+
+ nss_top_main.subsys_dp_register[if_num].ndev = NULL;
+ nss_top_main.subsys_dp_register[if_num].cb = NULL;
+ nss_top_main.subsys_dp_register[if_num].app_data = NULL;
+ nss_top_main.subsys_dp_register[if_num].features = 0;
+
+ nss_top_main.pptp_msg_callback = NULL;
+
+ nss_core_unregister_handler(if_num);
+}
+
+/*
+ * nss_get_pptp_context()
+ */
+struct nss_ctx_instance *nss_pptp_get_context()
+{
+ return (struct nss_ctx_instance *)&nss_top_main.nss[nss_top_main.pptp_handler_id];
+}
+
+/*
+ * nss_pptp_msg_init()
+ * Initialize nss_pptp msg.
+ */
+void nss_pptp_msg_init(struct nss_pptp_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);
+}
+
+/* nss_pptp_register_handler()
+ * debugfs stats msg handler received on static pptp interface
+ */
+void nss_pptp_register_handler(void)
+{
+ nss_info("nss_pptp_register_handler");
+ nss_core_register_handler(NSS_PPTP_INTERFACE, nss_pptp_handler, NULL);
+}
+
+EXPORT_SYMBOL(nss_pptp_get_context);
+EXPORT_SYMBOL(nss_pptp_tx);
+EXPORT_SYMBOL(nss_unregister_pptp_if);
+EXPORT_SYMBOL(nss_pptp_msg_init);
+EXPORT_SYMBOL(nss_register_pptp_if);