[qca-nss-drv] crypto changes for new API(s)
Crypto changes for new API(s)
Conflicts:
nss_hlos_if.h
Change-Id: I1bec88537bc85a597ec588b0054993cebc451d95
Signed-off-by: Samarjeet Banerjee <banerjee@codeaurora.org>
diff --git a/nss_crypto.c b/nss_crypto.c
new file mode 100644
index 0000000..d58c7ce
--- /dev/null
+++ b/nss_crypto.c
@@ -0,0 +1,311 @@
+/*
+ **************************************************************************
+ * Copyright (c) 2013, 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_crypto.c
+ * NSS Crypto APIs
+ */
+
+#include "nss_tx_rx_common.h"
+#include "nss_crypto.h"
+
+/*
+ **********************************
+ General APIs
+ **********************************
+ */
+
+#define nss_crypto_warning(fmt, arg...) nss_warning("Crypto:"fmt, ##arg)
+#define nss_crypto_info(fmt, arg...) nss_info("Crypto:"fmt, ##arg)
+#define nss_crypto_trace(fmt, arg...) nss_trace("Crypto:"fmt, ##arg)
+
+/*
+ * nss_crypto_set_msg_callback()
+ * this sets the message callback handler and its associated context
+ */
+static inline void nss_crypto_set_msg_callback(struct nss_ctx_instance *nss_ctx, nss_crypto_msg_callback_t cb, void *crypto_ctx)
+{
+ struct nss_top_instance *nss_top = nss_ctx->nss_top;
+
+ nss_top->crypto_ctx = crypto_ctx;
+ nss_top->crypto_msg_callback = cb;
+}
+
+/*
+ * nss_crypto_get_msg_callback()
+ * this gets the message callback handler and its associated context
+ */
+static inline nss_crypto_msg_callback_t nss_crypto_get_msg_callback(struct nss_ctx_instance *nss_ctx, void **crypto_ctx)
+{
+ struct nss_top_instance *nss_top = nss_ctx->nss_top;
+
+ *crypto_ctx = nss_top->crypto_ctx;
+ return nss_top->crypto_msg_callback;
+}
+
+/*
+ **********************************
+ Rx APIs
+ **********************************
+ */
+
+/*
+ * nss_crypto_buf_handler()
+ * RX packet handler for crypto buf, note the crypto buf is special
+ */
+void nss_crypto_buf_handler(struct nss_ctx_instance *nss_ctx, void *buf, uint32_t paddr, uint16_t len)
+{
+ struct nss_top_instance *nss_top = nss_ctx->nss_top;
+ void *app_data = nss_top->crypto_ctx;
+ nss_crypto_buf_callback_t cb = nss_top->crypto_buf_callback;
+
+ if (unlikely(!cb)) {
+ nss_crypto_trace("%p: rx data handler has been unregistered for i/f: %d", nss_ctx, ncm->interface);
+ return;
+ }
+
+ cb(app_data, buf, paddr, len);
+}
+/*
+ * nss_crypto_msg_handler()
+ * this handles all the IPsec events and responses
+ */
+static void nss_crypto_msg_handler(struct nss_ctx_instance *nss_ctx, struct nss_cmn_msg *ncm, void *app_data __attribute((unused)))
+{
+ struct nss_crypto_msg *nim = (struct nss_crypto_msg *)ncm;
+ nss_crypto_msg_callback_t cb = NULL;
+ void *crypto_ctx = NULL;
+
+ /*
+ * Sanity check the message type
+ */
+ if (ncm->type > NSS_CRYPTO_MSG_TYPE_MAX) {
+ nss_crypto_warning("%p: rx message type out of range: %d", nss_ctx, ncm->type);
+ return;
+ }
+
+ if (ncm->len > sizeof(struct nss_crypto_msg)) {
+ nss_crypto_warning("%p: rx request for another interface: %d", nss_ctx, ncm->interface);
+ return;
+ }
+
+ if (ncm->interface != NSS_CRYPTO_INTERFACE) {
+ nss_crypto_warning("%p: rx message request for another interface: %d", nss_ctx, ncm->interface);
+ return;
+ }
+
+ if (ncm->response == NSS_CMN_RESPONSE_LAST) {
+ nss_crypto_warning("%p: rx message response for if %d, type %d, is invalid: %d", nss_ctx, ncm->interface,
+ ncm->type, ncm->response);
+ return;
+ }
+
+ if (ncm->response == NSS_CMM_RESPONSE_NOTIFY) {
+ ncm->cb = (uint32_t)nss_crypto_get_msg_callback(nss_ctx, &crypto_ctx);
+ ncm->app_data = (uint32_t)crypto_ctx;
+ }
+
+
+ nss_core_log_msg_failures(nss_ctx, ncm);
+
+ /*
+ * Load, Test & call
+ */
+ cb = (nss_crypto_msg_callback_t)ncm->cb;
+ if (unlikely(!cb)) {
+ nss_crypto_trace("%p: rx handler has been unregistered for i/f: %d", nss_ctx, ncm->interface);
+ return;
+ }
+ cb((void *)ncm->app_data, nim);
+}
+/*
+ **********************************
+ Tx APIs
+ **********************************
+ */
+
+/*
+ * nss_crypto_tx_msg
+ * Send crypto config to NSS.
+ */
+nss_tx_status_t nss_crypto_tx_msg(struct nss_ctx_instance *nss_ctx, struct nss_crypto_msg *msg)
+{
+ struct nss_cmn_msg *ncm = &msg->cm;
+ struct nss_crypto_msg *nim;
+ struct sk_buff *nbuf;
+ int32_t status;
+
+ nss_crypto_info("%p: tx message %d for if %d\n", nss_ctx, ncm->type, ncm->interface);
+
+ NSS_VERIFY_CTX_MAGIC(nss_ctx);
+ if (unlikely(nss_ctx->state != NSS_CORE_STATE_INITIALIZED)) {
+ nss_crypto_warning("%p: tx message dropped as core not ready", nss_ctx);
+ return NSS_TX_FAILURE_NOT_READY;
+ }
+
+
+ if (NSS_NBUF_PAYLOAD_SIZE < sizeof(struct nss_crypto_msg)) {
+ nss_crypto_warning("%p: tx message request is too large: %d (desired), %d (requested)", nss_ctx,
+ NSS_NBUF_PAYLOAD_SIZE, sizeof(struct nss_crypto_msg));
+ return NSS_TX_FAILURE_TOO_LARGE;
+ }
+
+ if (ncm->interface != NSS_CRYPTO_INTERFACE) {
+ nss_crypto_warning("%p: tx message request for another interface: %d", nss_ctx, ncm->interface);
+ }
+
+ if (ncm->type > NSS_CRYPTO_MSG_TYPE_MAX) {
+ nss_crypto_warning("%p: tx message type out of range: %d", nss_ctx, ncm->type);
+ return NSS_TX_FAILURE;
+ }
+
+ if (ncm->len > sizeof(struct nss_crypto_msg)) {
+ nss_crypto_warning("%p: tx message request len for if %d, is bad: %d", nss_ctx, ncm->interface, ncm->len);
+ return NSS_TX_FAILURE_BAD_PARAM;
+ }
+
+ 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_crypto_warning("%p: tx config dropped as command allocation failed", nss_ctx);
+ return NSS_TX_FAILURE;
+ }
+
+ nim = (struct nss_crypto_msg *)skb_put(nbuf, sizeof(struct nss_crypto_msg));
+ memcpy(nim, msg, sizeof(struct nss_crypto_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_crypto_warning("%p: Unable to enqueue 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);
+
+ return NSS_TX_SUCCESS;
+}
+
+/*
+ * nss_crypto_tx_data()
+ * NSS crypto TX data API. Sends a crypto buffer to NSS.
+ */
+nss_tx_status_t nss_crypto_tx_buf(struct nss_ctx_instance *nss_ctx, void *buf, uint32_t buf_paddr, uint16_t len)
+{
+ int32_t status;
+
+ nss_crypto_trace("%p: tx_data buf=%p", nss_ctx, buf);
+
+ NSS_VERIFY_CTX_MAGIC(nss_ctx);
+ if (unlikely(nss_ctx->state != NSS_CORE_STATE_INITIALIZED)) {
+ nss_crypto_warning("%p: tx_data packet dropped as core not ready", nss_ctx);
+ return NSS_TX_FAILURE_NOT_READY;
+ }
+
+ status = nss_core_send_crypto(nss_ctx, buf, buf_paddr, len);
+ if (unlikely(status != NSS_CORE_STATUS_SUCCESS)) {
+ nss_crypto_warning("%p: tx_data Unable to enqueue packet", nss_ctx);
+ if (status == NSS_CORE_STATUS_FAILURE_QUEUE) {
+ return NSS_TX_FAILURE_QUEUE;
+ }
+
+ return NSS_TX_FAILURE;
+ }
+
+ /*
+ * Kick the NSS awake so it can process our new entry.
+ */
+ nss_hal_send_interrupt(nss_ctx->nmap, nss_ctx->h2n_desc_rings[NSS_IF_DATA_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_CRYPTO_REQ]);
+
+ return NSS_TX_SUCCESS;
+}
+
+/*
+ **********************************
+ Register APIs
+ **********************************
+ */
+
+/*
+ * nss_crypto_notify_register()
+ * register message notifier for crypto interface
+ */
+struct nss_ctx_instance *nss_crypto_notify_register(nss_crypto_msg_callback_t cb, void *app_data)
+{
+ struct nss_ctx_instance *nss_ctx;
+
+ nss_ctx = &nss_top_main.nss[nss_top_main.crypto_handler_id];
+
+ nss_crypto_set_msg_callback(nss_ctx, cb, app_data);
+
+ return nss_ctx;
+}
+
+/*
+ * nss_crypto_notify_unregister()
+ * unregister message notifier for crypto interface
+ */
+void nss_crypto_notify_unregister(struct nss_ctx_instance *nss_ctx)
+{
+ nss_crypto_set_msg_callback(nss_ctx, NULL, NULL);
+}
+
+/*
+ * nss_crypto_data_register()
+ * register a data callback routine
+ */
+struct nss_ctx_instance *nss_crypto_data_register(nss_crypto_buf_callback_t cb, void *app_data)
+{
+ struct nss_ctx_instance *nss_ctx;
+
+ nss_ctx = &nss_top_main.nss[nss_top_main.crypto_handler_id];
+
+ nss_ctx->nss_top->crypto_ctx = app_data;
+ nss_ctx->nss_top->crypto_buf_callback = cb;
+
+ return nss_ctx;
+}
+
+/*
+ * nss_crypto_data_unregister()
+ * unregister a data callback routine
+ */
+void nss_crypto_data_unregister(struct nss_ctx_instance *nss_ctx)
+{
+ nss_ctx->nss_top->crypto_ctx = NULL;
+ nss_ctx->nss_top->crypto_buf_callback = NULL;
+}
+
+/*
+ * nss_crypto_register_handler()
+ */
+void nss_crypto_register_handler()
+{
+ nss_core_register_handler(NSS_CRYPTO_INTERFACE, nss_crypto_msg_handler, NULL);
+}
+
+EXPORT_SYMBOL(nss_crypto_notify_register);
+EXPORT_SYMBOL(nss_crypto_notify_unregister);
+EXPORT_SYMBOL(nss_crypto_data_register);
+EXPORT_SYMBOL(nss_crypto_data_unregister);
+EXPORT_SYMBOL(nss_crypto_tx_msg);
+EXPORT_SYMBOL(nss_crypto_tx_buf);