blob: 1313182e59e4985dd9e35beb628fd393ae55d1b8 [file] [log] [blame]
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +05301/*
2 **************************************************************************
Murat Sezgind80f3bd2014-12-10 15:38:06 -08003 * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +05304 * Permission to use, copy, modify, and/or distribute this software for
5 * any purpose with or without fee is hereby granted, provided that the
6 * above copyright notice and this permission notice appear in all copies.
7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
10 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
12 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
13 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
14 **************************************************************************
15 */
16
17/*
18 * nss_pppoe.c
19 * NSS PPPoE APIs
20 */
21
22#include "nss_tx_rx_common.h"
Murat Sezgind80f3bd2014-12-10 15:38:06 -080023#include <linux/if_pppox.h>
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +053024
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +053025/*
26 * nss_pppoe_tx()
27 * Transmit an PPPoe message to the FW.
28 */
29nss_tx_status_t nss_pppoe_tx(struct nss_ctx_instance *nss_ctx, struct nss_pppoe_msg *nim)
30{
31 struct nss_pppoe_msg *nim2;
32 struct nss_cmn_msg *ncm = &nim->cm;
33 struct sk_buff *nbuf;
34 int32_t status;
35
36 NSS_VERIFY_CTX_MAGIC(nss_ctx);
37
38 if (unlikely(nss_ctx->state != NSS_CORE_STATE_INITIALIZED)) {
39 nss_warning("%p: pppoe msg dropped as core not ready", nss_ctx);
40 return NSS_TX_FAILURE_NOT_READY;
41 }
42
43 /*
44 * Sanity check the message
45 */
46 if (ncm->interface != NSS_PPPOE_RX_INTERFACE) {
47 nss_warning("%p: tx request for another interface: %d", nss_ctx, ncm->interface);
48 return NSS_TX_FAILURE;
49 }
50
51 if (ncm->type > NSS_PPPOE_MAX) {
52 nss_warning("%p: message type out of range: %d", nss_ctx, ncm->type);
53 return NSS_TX_FAILURE;
54 }
55
56 if (ncm->len > sizeof(struct nss_pppoe_msg)) {
57 nss_warning("%p: message length is invalid: %d", nss_ctx, ncm->len);
58 return NSS_TX_FAILURE;
59 }
60
Pamidipati, Vijayb6e38842014-09-16 10:26:05 +053061 nbuf = dev_alloc_skb(NSS_NBUF_PAYLOAD_SIZE);
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +053062 if (unlikely(!nbuf)) {
Sundarajan Srinivasan62fee7e2015-01-22 11:13:10 -080063 NSS_PKT_STATS_INCREMENT(nss_ctx, &nss_ctx->nss_top->stats_drv[NSS_STATS_DRV_NBUF_ALLOC_FAILS]);
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +053064 nss_warning("%p: msg dropped as command allocation failed", nss_ctx);
65 return NSS_TX_FAILURE;
66 }
67
68 /*
69 * Copy the message to our skb.
70 */
71 nim2 = (struct nss_pppoe_msg *)skb_put(nbuf, sizeof(struct nss_pppoe_msg));
72 memcpy(nim2, nim, sizeof(struct nss_pppoe_msg));
73
74 status = nss_core_send_buffer(nss_ctx, 0, nbuf, NSS_IF_CMD_QUEUE, H2N_BUFFER_CTRL, 0);
75 if (status != NSS_CORE_STATUS_SUCCESS) {
Pamidipati, Vijayb6e38842014-09-16 10:26:05 +053076 dev_kfree_skb_any(nbuf);
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +053077 nss_warning("%p: unable to enqueue PPPoE msg\n", nss_ctx);
78 return NSS_TX_FAILURE;
79 }
80
81 nss_hal_send_interrupt(nss_ctx->nmap, nss_ctx->h2n_desc_rings[NSS_IF_CMD_QUEUE].desc_ring.int_bit,
82 NSS_REGS_H2N_INTR_STATUS_DATA_COMMAND_QUEUE);
83
84 NSS_PKT_STATS_INCREMENT(nss_ctx, &nss_ctx->nss_top->stats_drv[NSS_STATS_DRV_TX_CMD_REQ]);
85
86 return NSS_TX_SUCCESS;
87}
88
89/*
90 **********************************
91 Rx APIs
92 **********************************
93 */
94
95/*
Murat Sezgin524f90c2014-11-13 17:39:17 -080096 * nss_pppoe_reset_session_stats()
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +053097 * Reset PPPoE stats when session is destroyed.
98 */
Murat Sezgin524f90c2014-11-13 17:39:17 -080099static void nss_pppoe_reset_session_stats(struct nss_ctx_instance *nss_ctx)
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +0530100{
101 uint32_t i, j, k;
102
103 /*
104 * Reset the PPPoE statistics.
105 */
106 spin_lock_bh(&nss_ctx->nss_top->stats_lock);
107
108 /*
109 * TODO: Don't reset all the statistics. Reset only the destroyed session's stats.
110 */
111 for (i = 0; i < NSS_MAX_PHYSICAL_INTERFACES; i++) {
112 for (j = 0; j < NSS_PPPOE_NUM_SESSION_PER_INTERFACE; j++) {
113 for (k = 0; k < NSS_PPPOE_EXCEPTION_EVENT_MAX; k++) {
114 nss_ctx->nss_top->stats_if_exception_pppoe[i][j][k] = 0;
115 }
116 }
117 }
118
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +0530119 /*
120 * TODO: Do we need to unregister the destroy method? The ppp_dev has already gone.
121 */
122 spin_unlock_bh(&nss_ctx->nss_top->stats_lock);
123}
124
125/*
126 * nss_pppoe_exception_stats_sync()
127 * Handle the syncing of PPPoE exception statistics.
128 */
129static void nss_pppoe_exception_stats_sync(struct nss_ctx_instance *nss_ctx, struct nss_pppoe_conn_stats_sync_msg *npess)
130{
131 struct nss_top_instance *nss_top = nss_ctx->nss_top;
132 uint32_t index = npess->index;
133 uint32_t interface_num = npess->interface_num;
134 uint32_t i;
135
136 spin_lock_bh(&nss_top->stats_lock);
137
138 if (interface_num >= NSS_MAX_PHYSICAL_INTERFACES) {
Murat Sezgin524f90c2014-11-13 17:39:17 -0800139 spin_unlock_bh(&nss_top->stats_lock);
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +0530140 nss_warning("%p: Incorrect interface number %d for PPPoE exception stats", nss_ctx, interface_num);
141 return;
142 }
143
144 /*
145 * pppoe exception stats
146 */
147 for (i = 0; i < NSS_PPPOE_EXCEPTION_EVENT_MAX; i++) {
148 nss_top->stats_if_exception_pppoe[interface_num][index][i] += npess->exception_events_pppoe[i];
149 }
150
151 spin_unlock_bh(&nss_top->stats_lock);
152}
153
154/*
155 * nss_pppoe_node_stats_sync()
156 * Handle the syncing of PPPoE node statistics.
157 */
158static void nss_pppoe_node_stats_sync(struct nss_ctx_instance *nss_ctx, struct nss_pppoe_node_stats_sync_msg *npess)
159{
160 struct nss_top_instance *nss_top = nss_ctx->nss_top;
161
162 spin_lock_bh(&nss_top->stats_lock);
163
164 nss_top->stats_node[NSS_PPPOE_RX_INTERFACE][NSS_STATS_NODE_RX_PKTS] += npess->node_stats.rx_packets;
165 nss_top->stats_node[NSS_PPPOE_RX_INTERFACE][NSS_STATS_NODE_RX_BYTES] += npess->node_stats.rx_bytes;
166 nss_top->stats_node[NSS_PPPOE_RX_INTERFACE][NSS_STATS_NODE_RX_DROPPED] += npess->node_stats.rx_dropped;
167 nss_top->stats_node[NSS_PPPOE_RX_INTERFACE][NSS_STATS_NODE_TX_PKTS] += npess->node_stats.tx_packets;
168 nss_top->stats_node[NSS_PPPOE_RX_INTERFACE][NSS_STATS_NODE_TX_BYTES] += npess->node_stats.tx_bytes;
169
170 nss_top->stats_pppoe[NSS_STATS_PPPOE_SESSION_CREATE_REQUESTS] += npess->pppoe_session_create_requests;
171 nss_top->stats_pppoe[NSS_STATS_PPPOE_SESSION_CREATE_FAILURES] += npess->pppoe_session_create_failures;
172 nss_top->stats_pppoe[NSS_STATS_PPPOE_SESSION_DESTROY_REQUESTS] += npess->pppoe_session_destroy_requests;
173 nss_top->stats_pppoe[NSS_STATS_PPPOE_SESSION_DESTROY_MISSES] += npess->pppoe_session_destroy_misses;
174
175 spin_unlock_bh(&nss_top->stats_lock);
176}
177
178/*
Sundarajan Srinivasanf1e57462014-09-17 15:24:01 -0700179 * nss_pppoe_destroy_connection_rule()
180 * Destroy PPoE connection rule associated with the session ID and remote server MAC address.
181 */
182
183/*
184 * TODO: This API should be deprecated soon and removed.
185 */
186static void nss_pppoe_destroy_connection_rule(void *ctx, uint16_t pppoe_session_id, uint8_t *pppoe_remote_mac)
187{
188 struct nss_ctx_instance *nss_ctx = (struct nss_ctx_instance *) ctx;
189 struct nss_pppoe_msg npm;
190 struct nss_pppoe_rule_destroy_msg *nprd;
191 uint16_t *pppoe_remote_mac_uint16_t = (uint16_t *)pppoe_remote_mac;
192 int32_t status;
193
194 /*
195 * TODO Remove this function once linux kernel directly calls nss_pppoe_tx()
196 */
197 nss_info("%p: Destroy all PPPoE rules of session ID: %x remote MAC: %x:%x:%x:%x:%x:%x", nss_ctx, pppoe_session_id,
198 pppoe_remote_mac[0], pppoe_remote_mac[1], pppoe_remote_mac[2],
199 pppoe_remote_mac[3], pppoe_remote_mac[4], pppoe_remote_mac[5]);
200
Sundarajan Srinivasan02e6c2b2014-10-06 11:51:12 -0700201 nss_pppoe_msg_init(&npm, NSS_PPPOE_RX_INTERFACE, NSS_PPPOE_TX_CONN_RULE_DESTROY,
Sundarajan Srinivasanf1e57462014-09-17 15:24:01 -0700202 sizeof(struct nss_pppoe_rule_destroy_msg), NULL, NULL);
203
204 nprd = &npm.msg.pppoe_rule_destroy;
205
206 nprd->pppoe_session_id = pppoe_session_id;
207 nprd->pppoe_remote_mac[0] = pppoe_remote_mac_uint16_t[0];
208 nprd->pppoe_remote_mac[1] = pppoe_remote_mac_uint16_t[1];
209 nprd->pppoe_remote_mac[2] = pppoe_remote_mac_uint16_t[2];
210
211 status = nss_pppoe_tx(nss_ctx, &npm);
212 if (status != NSS_TX_SUCCESS) {
213 nss_warning("%p: Not able to send destroy pppoe rule msg to NSS %x\n", nss_ctx, status);
214 }
215}
216
217/*
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +0530218 * nss_pppoe_rule_create_success()
219 * Handle the PPPoE rule create success message.
220 */
221static void nss_pppoe_rule_create_success(struct nss_ctx_instance *nss_ctx, struct nss_pppoe_rule_create_success_msg *pcs)
222{
Sundarajan Srinivasan4691ba62014-11-07 11:24:07 -0800223#if (NSS_PPP_SUPPORT == 1)
Murat Sezgind80f3bd2014-12-10 15:38:06 -0800224 struct net_device *ppp_dev = pppoe_get_and_hold_netdev_from_session_info(pcs->pppoe_session_id, pcs->pppoe_remote_mac);
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +0530225
226 if (!ppp_dev) {
227 nss_warning("%p: There is not any PPP devices with SID: %x remote MAC: %x:%x:%x:%x:%x:%x", nss_ctx, pcs->pppoe_session_id,
228 pcs->pppoe_remote_mac[0], pcs->pppoe_remote_mac[1], pcs->pppoe_remote_mac[2],
229 pcs->pppoe_remote_mac[3], pcs->pppoe_remote_mac[4], pcs->pppoe_remote_mac[5]);
230
231 return;
232 }
233
234 /*
235 * TODO Remove this registration once kernel directly calls nss_pppoe_tx().
236 */
Sundarajan Srinivasanf1e57462014-09-17 15:24:01 -0700237 if (!ppp_register_destroy_method(ppp_dev, nss_pppoe_destroy_connection_rule, (void *)nss_ctx)) {
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +0530238 nss_warning("%p: Failed to register destroy method", nss_ctx);
239 }
240
241 dev_put(ppp_dev);
Sundarajan Srinivasan4691ba62014-11-07 11:24:07 -0800242#endif
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +0530243}
244
245/*
246 * nss_pppoe_rx_msg_handler()
247 * Handle NSS -> HLOS messages for PPPoE
248 */
249static void nss_pppoe_rx_msg_handler(struct nss_ctx_instance *nss_ctx, struct nss_cmn_msg *ncm, __attribute__((unused))void *app_data)
250{
251 struct nss_pppoe_msg *nim = (struct nss_pppoe_msg *)ncm;
252
253 BUG_ON(ncm->interface != NSS_PPPOE_RX_INTERFACE);
254
255 /*
256 * Sanity check the message type
257 */
258 if (ncm->type > NSS_PPPOE_MAX) {
259 nss_warning("%p: message type out of range: %d", nss_ctx, ncm->type);
260 return;
261 }
262
263 if (ncm->len > sizeof(struct nss_pppoe_msg)) {
264 nss_warning("%p: message length is invalid: %d", nss_ctx, ncm->len);
265 return;
266 }
267
268 /*
269 * Log failures
270 */
271 nss_core_log_msg_failures(nss_ctx, ncm);
272
273 /*
274 * Handling PPPoE messages coming from NSS fw.
275 */
276 switch (nim->cm.type) {
277 case NSS_PPPOE_RX_CONN_RULE_SUCCESS:
278 nss_pppoe_rule_create_success(nss_ctx, &nim->msg.pppoe_rule_create_success);
279 break;
280
281 case NSS_PPPOE_RX_NODE_STATS_SYNC:
282 nss_pppoe_node_stats_sync(nss_ctx, &nim->msg.pppoe_node_stats_sync);
283 break;
284
285 case NSS_PPPOE_RX_CONN_STATS_SYNC:
286 nss_pppoe_exception_stats_sync(nss_ctx, &nim->msg.pppoe_conn_stats_sync);
287 break;
288
289 case NSS_PPPOE_TX_CONN_RULE_DESTROY:
290 if (ncm->response == NSS_CMN_RESPONSE_ACK) {
Murat Sezgin524f90c2014-11-13 17:39:17 -0800291 nss_pppoe_reset_session_stats(nss_ctx);
Ankit Dhanukaa1569ce2014-05-13 19:58:06 +0530292 }
293 break;
294
295 default:
296 nss_warning("%p: Received response %d for type %d, interface %d",
297 nss_ctx, ncm->response, ncm->type, ncm->interface);
298 }
299}
300
301/*
302 * nss_pppoe_register_handler()
303 */
304void nss_pppoe_register_handler()
305{
306 nss_core_register_handler(NSS_PPPOE_RX_INTERFACE, nss_pppoe_rx_msg_handler, NULL);
307}
Sundarajan Srinivasan02e6c2b2014-10-06 11:51:12 -0700308
309/*
310 * nss_pppoe_msg_init()
311 * Initialize pppoe message.
312 */
313void nss_pppoe_msg_init(struct nss_pppoe_msg *npm, uint16_t if_num, uint32_t type, uint32_t len,
314 void *cb, void *app_data)
315{
316 nss_cmn_msg_init(&npm->cm, if_num, type, len, (void *)cb, app_data);
317}
318