Commit | Line | Data |
---|---|---|
838e4f44 AP |
1 | /* |
2 | * Marvell Wireless LAN device driver: AP TX and RX data handling | |
3 | * | |
65da33f5 | 4 | * Copyright (C) 2012-2014, Marvell International Ltd. |
838e4f44 AP |
5 | * |
6 | * This software file (the "File") is distributed by Marvell International | |
7 | * Ltd. under the terms of the GNU General Public License Version 2, June 1991 | |
8 | * (the "License"). You may use, redistribute and/or modify this File in | |
9 | * accordance with the terms and conditions of the License, a copy of which | |
10 | * is available by writing to the Free Software Foundation, Inc., | |
11 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the | |
12 | * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. | |
13 | * | |
14 | * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE | |
15 | * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE | |
16 | * ARE EXPRESSLY DISCLAIMED. The License provides additional details about | |
17 | * this warranty disclaimer. | |
18 | */ | |
19 | ||
20 | #include "decl.h" | |
21 | #include "ioctl.h" | |
22 | #include "main.h" | |
23 | #include "wmm.h" | |
d1cf3b95 AP |
24 | #include "11n_aggr.h" |
25 | #include "11n_rxreorder.h" | |
838e4f44 | 26 | |
61c87304 AP |
27 | /* This function checks if particular RA list has packets more than low bridge |
28 | * packet threshold and then deletes packet from this RA list. | |
29 | * Function deletes packets from such RA list and returns true. If no such list | |
30 | * is found, false is returned. | |
31 | */ | |
32 | static bool | |
33 | mwifiex_uap_del_tx_pkts_in_ralist(struct mwifiex_private *priv, | |
34 | struct list_head *ra_list_head) | |
35 | { | |
36 | struct mwifiex_ra_list_tbl *ra_list; | |
37 | struct sk_buff *skb, *tmp; | |
38 | bool pkt_deleted = false; | |
39 | struct mwifiex_txinfo *tx_info; | |
40 | struct mwifiex_adapter *adapter = priv->adapter; | |
41 | ||
42 | list_for_each_entry(ra_list, ra_list_head, list) { | |
43 | if (skb_queue_empty(&ra_list->skb_head)) | |
44 | continue; | |
45 | ||
46 | skb_queue_walk_safe(&ra_list->skb_head, skb, tmp) { | |
47 | tx_info = MWIFIEX_SKB_TXCB(skb); | |
48 | if (tx_info->flags & MWIFIEX_BUF_FLAG_BRIDGED_PKT) { | |
49 | __skb_unlink(skb, &ra_list->skb_head); | |
50 | mwifiex_write_data_complete(adapter, skb, 0, | |
51 | -1); | |
52 | atomic_dec(&priv->wmm.tx_pkts_queued); | |
53 | pkt_deleted = true; | |
54 | } | |
55 | if ((atomic_read(&adapter->pending_bridged_pkts) <= | |
56 | MWIFIEX_BRIDGED_PKTS_THR_LOW)) | |
57 | break; | |
58 | } | |
59 | } | |
60 | ||
61 | return pkt_deleted; | |
62 | } | |
63 | ||
64 | /* This function deletes packets from particular RA List. RA list index | |
65 | * from which packets are deleted is preserved so that packets from next RA | |
66 | * list are deleted upon subsequent call thus maintaining fairness. | |
67 | */ | |
68 | static void mwifiex_uap_cleanup_tx_queues(struct mwifiex_private *priv) | |
69 | { | |
70 | unsigned long flags; | |
71 | struct list_head *ra_list; | |
72 | int i; | |
73 | ||
74 | spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); | |
75 | ||
76 | for (i = 0; i < MAX_NUM_TID; i++, priv->del_list_idx++) { | |
77 | if (priv->del_list_idx == MAX_NUM_TID) | |
78 | priv->del_list_idx = 0; | |
79 | ra_list = &priv->wmm.tid_tbl_ptr[priv->del_list_idx].ra_list; | |
80 | if (mwifiex_uap_del_tx_pkts_in_ralist(priv, ra_list)) { | |
81 | priv->del_list_idx++; | |
82 | break; | |
83 | } | |
84 | } | |
85 | ||
86 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); | |
87 | } | |
88 | ||
89 | ||
838e4f44 AP |
90 | static void mwifiex_uap_queue_bridged_pkt(struct mwifiex_private *priv, |
91 | struct sk_buff *skb) | |
92 | { | |
93 | struct mwifiex_adapter *adapter = priv->adapter; | |
94 | struct uap_rxpd *uap_rx_pd; | |
95 | struct rx_packet_hdr *rx_pkt_hdr; | |
96 | struct sk_buff *new_skb; | |
97 | struct mwifiex_txinfo *tx_info; | |
98 | int hdr_chop; | |
8d93f1f3 | 99 | struct ethhdr *p_ethhdr; |
838e4f44 AP |
100 | |
101 | uap_rx_pd = (struct uap_rxpd *)(skb->data); | |
102 | rx_pkt_hdr = (void *)uap_rx_pd + le16_to_cpu(uap_rx_pd->rx_pkt_offset); | |
103 | ||
104 | if ((atomic_read(&adapter->pending_bridged_pkts) >= | |
61c87304 | 105 | MWIFIEX_BRIDGED_PKTS_THR_HIGH)) { |
838e4f44 AP |
106 | dev_err(priv->adapter->dev, |
107 | "Tx: Bridge packet limit reached. Drop packet!\n"); | |
108 | kfree_skb(skb); | |
61c87304 | 109 | mwifiex_uap_cleanup_tx_queues(priv); |
838e4f44 AP |
110 | return; |
111 | } | |
112 | ||
c613d16f AK |
113 | if ((!memcmp(&rx_pkt_hdr->rfc1042_hdr, bridge_tunnel_header, |
114 | sizeof(bridge_tunnel_header))) || | |
115 | (!memcmp(&rx_pkt_hdr->rfc1042_hdr, rfc1042_header, | |
116 | sizeof(rfc1042_header)) && | |
117 | ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_AARP && | |
118 | ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_IPX)) { | |
8d93f1f3 UR |
119 | /* Replace the 803 header and rfc1042 header (llc/snap) with |
120 | * an Ethernet II header, keep the src/dst and snap_type | |
121 | * (ethertype). | |
122 | * | |
123 | * The firmware only passes up SNAP frames converting all RX | |
124 | * data from 802.11 to 802.2/LLC/SNAP frames. | |
125 | * | |
126 | * To create the Ethernet II, just move the src, dst address | |
127 | * right before the snap_type. | |
128 | */ | |
129 | p_ethhdr = (struct ethhdr *) | |
130 | ((u8 *)(&rx_pkt_hdr->eth803_hdr) | |
131 | + sizeof(rx_pkt_hdr->eth803_hdr) | |
132 | + sizeof(rx_pkt_hdr->rfc1042_hdr) | |
133 | - sizeof(rx_pkt_hdr->eth803_hdr.h_dest) | |
134 | - sizeof(rx_pkt_hdr->eth803_hdr.h_source) | |
135 | - sizeof(rx_pkt_hdr->rfc1042_hdr.snap_type)); | |
136 | memcpy(p_ethhdr->h_source, rx_pkt_hdr->eth803_hdr.h_source, | |
137 | sizeof(p_ethhdr->h_source)); | |
138 | memcpy(p_ethhdr->h_dest, rx_pkt_hdr->eth803_hdr.h_dest, | |
139 | sizeof(p_ethhdr->h_dest)); | |
838e4f44 AP |
140 | /* Chop off the rxpd + the excess memory from |
141 | * 802.2/llc/snap header that was removed. | |
142 | */ | |
8d93f1f3 UR |
143 | hdr_chop = (u8 *)p_ethhdr - (u8 *)uap_rx_pd; |
144 | } else { | |
838e4f44 AP |
145 | /* Chop off the rxpd */ |
146 | hdr_chop = (u8 *)&rx_pkt_hdr->eth803_hdr - (u8 *)uap_rx_pd; | |
8d93f1f3 | 147 | } |
838e4f44 | 148 | |
f7b59853 | 149 | /* Chop off the leading header bytes so that it points |
838e4f44 AP |
150 | * to the start of either the reconstructed EthII frame |
151 | * or the 802.2/llc/snap frame. | |
152 | */ | |
153 | skb_pull(skb, hdr_chop); | |
154 | ||
155 | if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) { | |
156 | dev_dbg(priv->adapter->dev, | |
157 | "data: Tx: insufficient skb headroom %d\n", | |
158 | skb_headroom(skb)); | |
159 | /* Insufficient skb headroom - allocate a new skb */ | |
160 | new_skb = | |
161 | skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN); | |
162 | if (unlikely(!new_skb)) { | |
163 | dev_err(priv->adapter->dev, | |
164 | "Tx: cannot allocate new_skb\n"); | |
165 | kfree_skb(skb); | |
166 | priv->stats.tx_dropped++; | |
167 | return; | |
168 | } | |
169 | ||
170 | kfree_skb(skb); | |
171 | skb = new_skb; | |
172 | dev_dbg(priv->adapter->dev, "info: new skb headroom %d\n", | |
173 | skb_headroom(skb)); | |
174 | } | |
175 | ||
176 | tx_info = MWIFIEX_SKB_TXCB(skb); | |
701a9e61 | 177 | memset(tx_info, 0, sizeof(*tx_info)); |
838e4f44 AP |
178 | tx_info->bss_num = priv->bss_num; |
179 | tx_info->bss_type = priv->bss_type; | |
180 | tx_info->flags |= MWIFIEX_BUF_FLAG_BRIDGED_PKT; | |
181 | ||
f7b59853 UR |
182 | if (is_unicast_ether_addr(rx_pkt_hdr->eth803_hdr.h_dest)) { |
183 | /* Update bridge packet statistics as the | |
184 | * packet is not going to kernel/upper layer. | |
185 | */ | |
186 | priv->stats.rx_bytes += skb->len; | |
187 | priv->stats.rx_packets++; | |
188 | ||
189 | /* Sending bridge packet to TX queue, so save the packet | |
190 | * length in TXCB to update statistics in TX complete. | |
191 | */ | |
192 | tx_info->pkt_len = skb->len; | |
193 | } | |
194 | ||
c64800e7 | 195 | __net_timestamp(skb); |
838e4f44 AP |
196 | mwifiex_wmm_add_buf_txqueue(priv, skb); |
197 | atomic_inc(&adapter->tx_pending); | |
198 | atomic_inc(&adapter->pending_bridged_pkts); | |
199 | ||
838e4f44 AP |
200 | return; |
201 | } | |
202 | ||
203 | /* | |
204 | * This function contains logic for AP packet forwarding. | |
205 | * | |
206 | * If a packet is multicast/broadcast, it is sent to kernel/upper layer | |
207 | * as well as queued back to AP TX queue so that it can be sent to other | |
208 | * associated stations. | |
209 | * If a packet is unicast and RA is present in associated station list, | |
210 | * it is again requeued into AP TX queue. | |
211 | * If a packet is unicast and RA is not in associated station list, | |
212 | * packet is forwarded to kernel to handle routing logic. | |
213 | */ | |
214 | int mwifiex_handle_uap_rx_forward(struct mwifiex_private *priv, | |
215 | struct sk_buff *skb) | |
216 | { | |
217 | struct mwifiex_adapter *adapter = priv->adapter; | |
218 | struct uap_rxpd *uap_rx_pd; | |
219 | struct rx_packet_hdr *rx_pkt_hdr; | |
220 | u8 ra[ETH_ALEN]; | |
221 | struct sk_buff *skb_uap; | |
222 | ||
223 | uap_rx_pd = (struct uap_rxpd *)(skb->data); | |
224 | rx_pkt_hdr = (void *)uap_rx_pd + le16_to_cpu(uap_rx_pd->rx_pkt_offset); | |
225 | ||
226 | /* don't do packet forwarding in disconnected state */ | |
227 | if (!priv->media_connected) { | |
228 | dev_err(adapter->dev, "drop packet in disconnected state.\n"); | |
229 | dev_kfree_skb_any(skb); | |
230 | return 0; | |
231 | } | |
232 | ||
233 | memcpy(ra, rx_pkt_hdr->eth803_hdr.h_dest, ETH_ALEN); | |
234 | ||
235 | if (is_multicast_ether_addr(ra)) { | |
236 | skb_uap = skb_copy(skb, GFP_ATOMIC); | |
237 | mwifiex_uap_queue_bridged_pkt(priv, skb_uap); | |
238 | } else { | |
239 | if (mwifiex_get_sta_entry(priv, ra)) { | |
240 | /* Requeue Intra-BSS packet */ | |
241 | mwifiex_uap_queue_bridged_pkt(priv, skb); | |
242 | return 0; | |
243 | } | |
244 | } | |
245 | ||
246 | /* Forward unicat/Inter-BSS packets to kernel. */ | |
f3b369e4 | 247 | return mwifiex_process_rx_packet(priv, skb); |
838e4f44 AP |
248 | } |
249 | ||
250 | /* | |
251 | * This function processes the packet received on AP interface. | |
252 | * | |
253 | * The function looks into the RxPD and performs sanity tests on the | |
254 | * received buffer to ensure its a valid packet before processing it | |
255 | * further. If the packet is determined to be aggregated, it is | |
256 | * de-aggregated accordingly. Then skb is passed to AP packet forwarding logic. | |
257 | * | |
258 | * The completion callback is called after processing is complete. | |
259 | */ | |
f3b369e4 | 260 | int mwifiex_process_uap_rx_packet(struct mwifiex_private *priv, |
838e4f44 AP |
261 | struct sk_buff *skb) |
262 | { | |
f3b369e4 | 263 | struct mwifiex_adapter *adapter = priv->adapter; |
838e4f44 AP |
264 | int ret; |
265 | struct uap_rxpd *uap_rx_pd; | |
838e4f44 AP |
266 | struct rx_packet_hdr *rx_pkt_hdr; |
267 | u16 rx_pkt_type; | |
d1cf3b95 | 268 | u8 ta[ETH_ALEN], pkt_type; |
c11fb985 | 269 | unsigned long flags; |
d1cf3b95 AP |
270 | struct mwifiex_sta_node *node; |
271 | ||
838e4f44 AP |
272 | uap_rx_pd = (struct uap_rxpd *)(skb->data); |
273 | rx_pkt_type = le16_to_cpu(uap_rx_pd->rx_pkt_type); | |
274 | rx_pkt_hdr = (void *)uap_rx_pd + le16_to_cpu(uap_rx_pd->rx_pkt_offset); | |
275 | ||
276 | if ((le16_to_cpu(uap_rx_pd->rx_pkt_offset) + | |
277 | le16_to_cpu(uap_rx_pd->rx_pkt_length)) > (u16) skb->len) { | |
278 | dev_err(adapter->dev, | |
279 | "wrong rx packet: len=%d, offset=%d, length=%d\n", | |
280 | skb->len, le16_to_cpu(uap_rx_pd->rx_pkt_offset), | |
281 | le16_to_cpu(uap_rx_pd->rx_pkt_length)); | |
282 | priv->stats.rx_dropped++; | |
ca8d6dfc | 283 | dev_kfree_skb_any(skb); |
838e4f44 AP |
284 | return 0; |
285 | } | |
838e4f44 | 286 | |
4c9f9fb2 | 287 | if (rx_pkt_type == PKT_TYPE_MGMT) { |
f3b369e4 | 288 | ret = mwifiex_process_mgmt_packet(priv, skb); |
2dbaf751 SP |
289 | if (ret) |
290 | dev_err(adapter->dev, "Rx of mgmt packet failed"); | |
291 | dev_kfree_skb_any(skb); | |
292 | return ret; | |
d1cf3b95 AP |
293 | } |
294 | ||
295 | memcpy(ta, rx_pkt_hdr->eth803_hdr.h_source, ETH_ALEN); | |
296 | ||
297 | if (rx_pkt_type != PKT_TYPE_BAR && uap_rx_pd->priority < MAX_NUM_TID) { | |
c11fb985 | 298 | spin_lock_irqsave(&priv->sta_list_spinlock, flags); |
d1cf3b95 AP |
299 | node = mwifiex_get_sta_entry(priv, ta); |
300 | if (node) | |
301 | node->rx_seq[uap_rx_pd->priority] = | |
302 | le16_to_cpu(uap_rx_pd->seq_num); | |
c11fb985 | 303 | spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); |
d1cf3b95 AP |
304 | } |
305 | ||
306 | if (!priv->ap_11n_enabled || | |
307 | (!mwifiex_11n_get_rx_reorder_tbl(priv, uap_rx_pd->priority, ta) && | |
308 | (le16_to_cpu(uap_rx_pd->rx_pkt_type) != PKT_TYPE_AMSDU))) { | |
309 | ret = mwifiex_handle_uap_rx_forward(priv, skb); | |
310 | return ret; | |
311 | } | |
312 | ||
313 | /* Reorder and send to kernel */ | |
314 | pkt_type = (u8)le16_to_cpu(uap_rx_pd->rx_pkt_type); | |
315 | ret = mwifiex_11n_rx_reorder_pkt(priv, le16_to_cpu(uap_rx_pd->seq_num), | |
316 | uap_rx_pd->priority, ta, pkt_type, | |
317 | skb); | |
318 | ||
ca8d6dfc UR |
319 | if (ret || (rx_pkt_type == PKT_TYPE_BAR)) |
320 | dev_kfree_skb_any(skb); | |
838e4f44 | 321 | |
d1cf3b95 AP |
322 | if (ret) |
323 | priv->stats.rx_dropped++; | |
324 | ||
838e4f44 AP |
325 | return ret; |
326 | } | |
4ac8764a AP |
327 | |
328 | /* | |
329 | * This function fills the TxPD for AP tx packets. | |
330 | * | |
331 | * The Tx buffer received by this function should already have the | |
332 | * header space allocated for TxPD. | |
333 | * | |
334 | * This function inserts the TxPD in between interface header and actual | |
335 | * data and adjusts the buffer pointers accordingly. | |
336 | * | |
337 | * The following TxPD fields are set by this function, as required - | |
338 | * - BSS number | |
339 | * - Tx packet length and offset | |
340 | * - Priority | |
341 | * - Packet delay | |
342 | * - Priority specific Tx control | |
343 | * - Flags | |
344 | */ | |
345 | void *mwifiex_process_uap_txpd(struct mwifiex_private *priv, | |
346 | struct sk_buff *skb) | |
347 | { | |
348 | struct mwifiex_adapter *adapter = priv->adapter; | |
349 | struct uap_txpd *txpd; | |
350 | struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb); | |
84b313b3 XH |
351 | int pad; |
352 | u16 pkt_type, pkt_offset; | |
353 | int hroom = (priv->adapter->iface_type == MWIFIEX_USB) ? 0 : | |
354 | INTF_HEADER_LEN; | |
4ac8764a AP |
355 | |
356 | if (!skb->len) { | |
357 | dev_err(adapter->dev, "Tx: bad packet length: %d\n", skb->len); | |
358 | tx_info->status_code = -1; | |
359 | return skb->data; | |
360 | } | |
361 | ||
84b313b3 | 362 | BUG_ON(skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN); |
4ac8764a | 363 | |
84b313b3 | 364 | pkt_type = mwifiex_is_skb_mgmt_frame(skb) ? PKT_TYPE_MGMT : 0; |
4ac8764a | 365 | |
84b313b3 XH |
366 | pad = ((void *)skb->data - (sizeof(*txpd) + hroom) - NULL) & |
367 | (MWIFIEX_DMA_ALIGN_SZ - 1); | |
4ac8764a | 368 | |
84b313b3 | 369 | skb_push(skb, sizeof(*txpd) + pad); |
4ac8764a AP |
370 | |
371 | txpd = (struct uap_txpd *)skb->data; | |
372 | memset(txpd, 0, sizeof(*txpd)); | |
373 | txpd->bss_num = priv->bss_num; | |
374 | txpd->bss_type = priv->bss_type; | |
84b313b3 XH |
375 | txpd->tx_pkt_length = cpu_to_le16((u16)(skb->len - (sizeof(*txpd) + |
376 | pad))); | |
4ac8764a | 377 | txpd->priority = (u8)skb->priority; |
808bbebc | 378 | |
4ac8764a AP |
379 | txpd->pkt_delay_2ms = mwifiex_wmm_compute_drv_pkt_delay(priv, skb); |
380 | ||
18ca4382 AK |
381 | if (tx_info->flags & MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS || |
382 | tx_info->flags & MWIFIEX_BUF_FLAG_ACTION_TX_STATUS) { | |
808bbebc AK |
383 | txpd->tx_token_id = tx_info->ack_frame_id; |
384 | txpd->flags |= MWIFIEX_TXPD_FLAGS_REQ_TX_STATUS; | |
385 | } | |
386 | ||
4ac8764a AP |
387 | if (txpd->priority < ARRAY_SIZE(priv->wmm.user_pri_pkt_tx_ctrl)) |
388 | /* | |
389 | * Set the priority specific tx_control field, setting of 0 will | |
390 | * cause the default value to be used later in this function. | |
391 | */ | |
392 | txpd->tx_control = | |
393 | cpu_to_le32(priv->wmm.user_pri_pkt_tx_ctrl[txpd->priority]); | |
394 | ||
395 | /* Offset of actual data */ | |
84b313b3 | 396 | pkt_offset = sizeof(*txpd) + pad; |
3215215a SP |
397 | if (pkt_type == PKT_TYPE_MGMT) { |
398 | /* Set the packet type and add header for management frame */ | |
399 | txpd->tx_pkt_type = cpu_to_le16(pkt_type); | |
84b313b3 | 400 | pkt_offset += MWIFIEX_MGMT_FRAME_HEADER_SIZE; |
3215215a SP |
401 | } |
402 | ||
84b313b3 | 403 | txpd->tx_pkt_offset = cpu_to_le16(pkt_offset); |
4ac8764a AP |
404 | |
405 | /* make space for INTF_HEADER_LEN */ | |
84b313b3 | 406 | skb_push(skb, hroom); |
4ac8764a AP |
407 | |
408 | if (!txpd->tx_control) | |
409 | /* TxCtrl set by user or default */ | |
410 | txpd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl); | |
411 | ||
412 | return skb->data; | |
413 | } |