| /* |
| ************************************************************************** |
| * Copyright (c) 2013,2015-2017, 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. |
| ************************************************************************** |
| */ |
| |
| /* |
| * nss_crypto.c |
| * NSS Crypto APIs |
| */ |
| |
| #include "nss_tx_rx_common.h" |
| #include "nss_crypto.h" |
| |
| /* |
| ********************************** |
| General APIs |
| ********************************** |
| */ |
| |
| /* |
| * 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; |
| } |
| |
| /* |
| * 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_warning("%p: rx message type out of range: %d", nss_ctx, ncm->type); |
| return; |
| } |
| |
| if (nss_cmn_get_msg_len(ncm) > sizeof(struct nss_crypto_msg)) { |
| nss_warning("%p: rx message length is invalid: %d", nss_ctx, nss_cmn_get_msg_len(ncm)); |
| return; |
| } |
| |
| if (ncm->interface != NSS_CRYPTO_INTERFACE) { |
| nss_warning("%p: rx message request for another interface: %d", nss_ctx, ncm->interface); |
| return; |
| } |
| |
| if (ncm->response == NSS_CMN_RESPONSE_LAST) { |
| nss_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 = (nss_ptr_t)nss_crypto_get_msg_callback(nss_ctx, &crypto_ctx); |
| ncm->app_data = (nss_ptr_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_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_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_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_warning("%p: tx message request is too large: %d (desired), %d (requested)", nss_ctx, |
| NSS_NBUF_PAYLOAD_SIZE, (int)sizeof(struct nss_crypto_msg)); |
| return NSS_TX_FAILURE_TOO_LARGE; |
| } |
| |
| if (ncm->interface != NSS_CRYPTO_INTERFACE) { |
| nss_warning("%p: tx message request for another interface: %d", nss_ctx, ncm->interface); |
| } |
| |
| if (ncm->type > NSS_CRYPTO_MSG_TYPE_MAX) { |
| nss_warning("%p: tx message type out of range: %d", nss_ctx, ncm->type); |
| return NSS_TX_FAILURE; |
| } |
| |
| if (nss_cmn_get_msg_len(ncm) > sizeof(struct nss_crypto_msg)) { |
| nss_warning("%p: tx message request len for if %d, is bad: %d", nss_ctx, ncm->interface, nss_cmn_get_msg_len(ncm)); |
| return NSS_TX_FAILURE_BAD_PARAM; |
| } |
| |
| 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: tx config dropped as command allocation failed", nss_ctx); |
| return NSS_TX_FAILURE; |
| } |
| |
| nss_info("msg params version:%d, interface:%d, type:%d, cb:%p, app_data:%p, len:%d\n", |
| ncm->version, ncm->interface, ncm->type, (void *)ncm->cb, (void *)ncm->app_data, ncm->len); |
| |
| 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_warning("%p: Unable to enqueue message\n", nss_ctx); |
| return NSS_TX_FAILURE; |
| } |
| |
| nss_hal_send_interrupt(nss_ctx, NSS_H2N_INTR_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, uint32_t if_num, struct sk_buff *skb) |
| { |
| int32_t status; |
| |
| nss_trace("%p: tx_data buf=%p", nss_ctx, skb); |
| |
| NSS_VERIFY_CTX_MAGIC(nss_ctx); |
| if (unlikely(nss_ctx->state != NSS_CORE_STATE_INITIALIZED)) { |
| nss_warning("%p: tx_data packet dropped as core not ready", nss_ctx); |
| return NSS_TX_FAILURE_NOT_READY; |
| } |
| |
| status = nss_core_send_buffer(nss_ctx, if_num, skb, NSS_IF_DATA_QUEUE_0, H2N_BUFFER_CRYPTO_REQ, 0); |
| if (unlikely(status != NSS_CORE_STATUS_SUCCESS)) { |
| nss_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, NSS_H2N_INTR_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(uint32_t if_num, nss_crypto_buf_callback_t cb, |
| struct net_device *netdev, uint32_t features) |
| { |
| struct nss_ctx_instance *nss_ctx; |
| |
| nss_ctx = &nss_top_main.nss[nss_top_main.crypto_handler_id]; |
| |
| if ((if_num >= NSS_MAX_NET_INTERFACES) && (if_num < NSS_MAX_PHYSICAL_INTERFACES)) { |
| nss_warning("%p: data register received for invalid interface %d", nss_ctx, if_num); |
| return NULL; |
| } |
| |
| /* |
| * Avoid multiple data callback registration with the |
| * sama interface number |
| */ |
| if (nss_ctx->subsys_dp_register[if_num].cb) { |
| return nss_ctx; |
| } |
| |
| nss_ctx->subsys_dp_register[if_num].cb = cb; |
| nss_ctx->subsys_dp_register[if_num].app_data = NULL; |
| nss_ctx->subsys_dp_register[if_num].ndev = netdev; |
| nss_ctx->subsys_dp_register[if_num].features = features; |
| |
| return nss_ctx; |
| } |
| |
| /* |
| * nss_crypto_data_unregister() |
| * unregister a data callback routine |
| */ |
| void nss_crypto_data_unregister(struct nss_ctx_instance *nss_ctx, uint32_t if_num) |
| { |
| if ((if_num >= NSS_MAX_NET_INTERFACES) && (if_num < NSS_MAX_PHYSICAL_INTERFACES)) { |
| nss_warning("%p: data unregister received for invalid interface %d", nss_ctx, if_num); |
| return; |
| } |
| |
| /* |
| * if already unregistered then return |
| */ |
| if (!nss_ctx->subsys_dp_register[if_num].cb) { |
| return; |
| } |
| |
| nss_ctx->subsys_dp_register[if_num].cb = NULL; |
| nss_ctx->subsys_dp_register[if_num].app_data = NULL; |
| nss_ctx->subsys_dp_register[if_num].ndev = NULL; |
| nss_ctx->subsys_dp_register[if_num].features = 0; |
| } |
| |
| /* |
| * nss_crypto_pm_notify_register() |
| * register a PM notify callback routine |
| */ |
| void nss_crypto_pm_notify_register(nss_crypto_pm_event_callback_t cb, void *app_data) |
| { |
| nss_top_main.crypto_pm_ctx = app_data; |
| nss_top_main.crypto_pm_callback = cb; |
| } |
| |
| /* |
| * nss_crypto_pm_notify_unregister() |
| * unregister a PM notify callback routine |
| */ |
| void nss_crypto_pm_notify_unregister(void) |
| { |
| nss_top_main.crypto_pm_ctx = NULL; |
| nss_top_main.crypto_pm_callback = NULL; |
| } |
| |
| /* |
| * nss_crypto_register_handler() |
| */ |
| void nss_crypto_register_handler() |
| { |
| nss_core_register_handler(NSS_CRYPTO_INTERFACE, nss_crypto_msg_handler, NULL); |
| } |
| |
| /* |
| * nss_crypto_msg_init() |
| * Initialize crypto message |
| */ |
| void nss_crypto_msg_init(struct nss_crypto_msg *ncm, uint16_t if_num, uint32_t type, uint32_t len, |
| nss_crypto_msg_callback_t cb, void *app_data) |
| { |
| nss_cmn_msg_init(&ncm->cm, if_num, type, len, (void *)cb, app_data); |
| } |
| |
| 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_pm_notify_register); |
| EXPORT_SYMBOL(nss_crypto_pm_notify_unregister); |
| EXPORT_SYMBOL(nss_crypto_tx_msg); |
| EXPORT_SYMBOL(nss_crypto_tx_buf); |
| EXPORT_SYMBOL(nss_crypto_msg_init); |