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, | |
70c5ad7e ZL |
34 | struct list_head *ra_list_head, |
35 | int tid) | |
61c87304 AP |
36 | { |
37 | struct mwifiex_ra_list_tbl *ra_list; | |
38 | struct sk_buff *skb, *tmp; | |
39 | bool pkt_deleted = false; | |
40 | struct mwifiex_txinfo *tx_info; | |
41 | struct mwifiex_adapter *adapter = priv->adapter; | |
42 | ||
43 | list_for_each_entry(ra_list, ra_list_head, list) { | |
44 | if (skb_queue_empty(&ra_list->skb_head)) | |
45 | continue; | |
46 | ||
47 | skb_queue_walk_safe(&ra_list->skb_head, skb, tmp) { | |
48 | tx_info = MWIFIEX_SKB_TXCB(skb); | |
49 | if (tx_info->flags & MWIFIEX_BUF_FLAG_BRIDGED_PKT) { | |
50 | __skb_unlink(skb, &ra_list->skb_head); | |
51 | mwifiex_write_data_complete(adapter, skb, 0, | |
52 | -1); | |
70c5ad7e ZL |
53 | if (ra_list->tx_paused) |
54 | priv->wmm.pkts_paused[tid]--; | |
55 | else | |
56 | atomic_dec(&priv->wmm.tx_pkts_queued); | |
61c87304 AP |
57 | pkt_deleted = true; |
58 | } | |
59 | if ((atomic_read(&adapter->pending_bridged_pkts) <= | |
60 | MWIFIEX_BRIDGED_PKTS_THR_LOW)) | |
61 | break; | |
62 | } | |
63 | } | |
64 | ||
65 | return pkt_deleted; | |
66 | } | |
67 | ||
68 | /* This function deletes packets from particular RA List. RA list index | |
69 | * from which packets are deleted is preserved so that packets from next RA | |
70 | * list are deleted upon subsequent call thus maintaining fairness. | |
71 | */ | |
72 | static void mwifiex_uap_cleanup_tx_queues(struct mwifiex_private *priv) | |
73 | { | |
74 | unsigned long flags; | |
75 | struct list_head *ra_list; | |
76 | int i; | |
77 | ||
78 | spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); | |
79 | ||
80 | for (i = 0; i < MAX_NUM_TID; i++, priv->del_list_idx++) { | |
81 | if (priv->del_list_idx == MAX_NUM_TID) | |
82 | priv->del_list_idx = 0; | |
83 | ra_list = &priv->wmm.tid_tbl_ptr[priv->del_list_idx].ra_list; | |
70c5ad7e | 84 | if (mwifiex_uap_del_tx_pkts_in_ralist(priv, ra_list, i)) { |
61c87304 AP |
85 | priv->del_list_idx++; |
86 | break; | |
87 | } | |
88 | } | |
89 | ||
90 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); | |
91 | } | |
92 | ||
93 | ||
838e4f44 AP |
94 | static void mwifiex_uap_queue_bridged_pkt(struct mwifiex_private *priv, |
95 | struct sk_buff *skb) | |
96 | { | |
97 | struct mwifiex_adapter *adapter = priv->adapter; | |
98 | struct uap_rxpd *uap_rx_pd; | |
99 | struct rx_packet_hdr *rx_pkt_hdr; | |
100 | struct sk_buff *new_skb; | |
101 | struct mwifiex_txinfo *tx_info; | |
102 | int hdr_chop; | |
8d93f1f3 | 103 | struct ethhdr *p_ethhdr; |
442f6f9b | 104 | struct mwifiex_sta_node *src_node; |
bb28c28e | 105 | int index; |
838e4f44 AP |
106 | |
107 | uap_rx_pd = (struct uap_rxpd *)(skb->data); | |
108 | rx_pkt_hdr = (void *)uap_rx_pd + le16_to_cpu(uap_rx_pd->rx_pkt_offset); | |
109 | ||
110 | if ((atomic_read(&adapter->pending_bridged_pkts) >= | |
61c87304 | 111 | MWIFIEX_BRIDGED_PKTS_THR_HIGH)) { |
acebe8c1 ZL |
112 | mwifiex_dbg(priv->adapter, ERROR, |
113 | "Tx: Bridge packet limit reached. Drop packet!\n"); | |
838e4f44 | 114 | kfree_skb(skb); |
61c87304 | 115 | mwifiex_uap_cleanup_tx_queues(priv); |
838e4f44 AP |
116 | return; |
117 | } | |
118 | ||
c613d16f AK |
119 | if ((!memcmp(&rx_pkt_hdr->rfc1042_hdr, bridge_tunnel_header, |
120 | sizeof(bridge_tunnel_header))) || | |
121 | (!memcmp(&rx_pkt_hdr->rfc1042_hdr, rfc1042_header, | |
122 | sizeof(rfc1042_header)) && | |
123 | ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_AARP && | |
124 | ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_IPX)) { | |
8d93f1f3 UR |
125 | /* Replace the 803 header and rfc1042 header (llc/snap) with |
126 | * an Ethernet II header, keep the src/dst and snap_type | |
127 | * (ethertype). | |
128 | * | |
129 | * The firmware only passes up SNAP frames converting all RX | |
130 | * data from 802.11 to 802.2/LLC/SNAP frames. | |
131 | * | |
132 | * To create the Ethernet II, just move the src, dst address | |
133 | * right before the snap_type. | |
134 | */ | |
135 | p_ethhdr = (struct ethhdr *) | |
136 | ((u8 *)(&rx_pkt_hdr->eth803_hdr) | |
137 | + sizeof(rx_pkt_hdr->eth803_hdr) | |
138 | + sizeof(rx_pkt_hdr->rfc1042_hdr) | |
139 | - sizeof(rx_pkt_hdr->eth803_hdr.h_dest) | |
140 | - sizeof(rx_pkt_hdr->eth803_hdr.h_source) | |
141 | - sizeof(rx_pkt_hdr->rfc1042_hdr.snap_type)); | |
142 | memcpy(p_ethhdr->h_source, rx_pkt_hdr->eth803_hdr.h_source, | |
143 | sizeof(p_ethhdr->h_source)); | |
144 | memcpy(p_ethhdr->h_dest, rx_pkt_hdr->eth803_hdr.h_dest, | |
145 | sizeof(p_ethhdr->h_dest)); | |
838e4f44 AP |
146 | /* Chop off the rxpd + the excess memory from |
147 | * 802.2/llc/snap header that was removed. | |
148 | */ | |
8d93f1f3 UR |
149 | hdr_chop = (u8 *)p_ethhdr - (u8 *)uap_rx_pd; |
150 | } else { | |
838e4f44 AP |
151 | /* Chop off the rxpd */ |
152 | hdr_chop = (u8 *)&rx_pkt_hdr->eth803_hdr - (u8 *)uap_rx_pd; | |
8d93f1f3 | 153 | } |
838e4f44 | 154 | |
f7b59853 | 155 | /* Chop off the leading header bytes so that it points |
838e4f44 AP |
156 | * to the start of either the reconstructed EthII frame |
157 | * or the 802.2/llc/snap frame. | |
158 | */ | |
159 | skb_pull(skb, hdr_chop); | |
160 | ||
161 | if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) { | |
acebe8c1 ZL |
162 | mwifiex_dbg(priv->adapter, ERROR, |
163 | "data: Tx: insufficient skb headroom %d\n", | |
164 | skb_headroom(skb)); | |
838e4f44 AP |
165 | /* Insufficient skb headroom - allocate a new skb */ |
166 | new_skb = | |
167 | skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN); | |
168 | if (unlikely(!new_skb)) { | |
acebe8c1 ZL |
169 | mwifiex_dbg(priv->adapter, ERROR, |
170 | "Tx: cannot allocate new_skb\n"); | |
838e4f44 AP |
171 | kfree_skb(skb); |
172 | priv->stats.tx_dropped++; | |
173 | return; | |
174 | } | |
175 | ||
176 | kfree_skb(skb); | |
177 | skb = new_skb; | |
acebe8c1 ZL |
178 | mwifiex_dbg(priv->adapter, INFO, |
179 | "info: new skb headroom %d\n", | |
180 | skb_headroom(skb)); | |
838e4f44 AP |
181 | } |
182 | ||
183 | tx_info = MWIFIEX_SKB_TXCB(skb); | |
701a9e61 | 184 | memset(tx_info, 0, sizeof(*tx_info)); |
838e4f44 AP |
185 | tx_info->bss_num = priv->bss_num; |
186 | tx_info->bss_type = priv->bss_type; | |
187 | tx_info->flags |= MWIFIEX_BUF_FLAG_BRIDGED_PKT; | |
188 | ||
442f6f9b XH |
189 | src_node = mwifiex_get_sta_entry(priv, rx_pkt_hdr->eth803_hdr.h_source); |
190 | if (src_node) { | |
191 | src_node->stats.last_rx = jiffies; | |
192 | src_node->stats.rx_bytes += skb->len; | |
193 | src_node->stats.rx_packets++; | |
194 | src_node->stats.last_tx_rate = uap_rx_pd->rx_rate; | |
195 | src_node->stats.last_tx_htinfo = uap_rx_pd->ht_info; | |
196 | } | |
197 | ||
f7b59853 UR |
198 | if (is_unicast_ether_addr(rx_pkt_hdr->eth803_hdr.h_dest)) { |
199 | /* Update bridge packet statistics as the | |
200 | * packet is not going to kernel/upper layer. | |
201 | */ | |
202 | priv->stats.rx_bytes += skb->len; | |
203 | priv->stats.rx_packets++; | |
204 | ||
205 | /* Sending bridge packet to TX queue, so save the packet | |
206 | * length in TXCB to update statistics in TX complete. | |
207 | */ | |
208 | tx_info->pkt_len = skb->len; | |
209 | } | |
210 | ||
c64800e7 | 211 | __net_timestamp(skb); |
bb28c28e MF |
212 | |
213 | index = mwifiex_1d_to_wmm_queue[skb->priority]; | |
214 | atomic_inc(&priv->wmm_tx_pending[index]); | |
838e4f44 AP |
215 | mwifiex_wmm_add_buf_txqueue(priv, skb); |
216 | atomic_inc(&adapter->tx_pending); | |
217 | atomic_inc(&adapter->pending_bridged_pkts); | |
218 | ||
ad5ca845 XH |
219 | mwifiex_queue_main_work(priv->adapter); |
220 | ||
838e4f44 AP |
221 | return; |
222 | } | |
223 | ||
224 | /* | |
225 | * This function contains logic for AP packet forwarding. | |
226 | * | |
227 | * If a packet is multicast/broadcast, it is sent to kernel/upper layer | |
228 | * as well as queued back to AP TX queue so that it can be sent to other | |
229 | * associated stations. | |
230 | * If a packet is unicast and RA is present in associated station list, | |
231 | * it is again requeued into AP TX queue. | |
232 | * If a packet is unicast and RA is not in associated station list, | |
233 | * packet is forwarded to kernel to handle routing logic. | |
234 | */ | |
235 | int mwifiex_handle_uap_rx_forward(struct mwifiex_private *priv, | |
236 | struct sk_buff *skb) | |
237 | { | |
238 | struct mwifiex_adapter *adapter = priv->adapter; | |
239 | struct uap_rxpd *uap_rx_pd; | |
240 | struct rx_packet_hdr *rx_pkt_hdr; | |
241 | u8 ra[ETH_ALEN]; | |
242 | struct sk_buff *skb_uap; | |
243 | ||
244 | uap_rx_pd = (struct uap_rxpd *)(skb->data); | |
245 | rx_pkt_hdr = (void *)uap_rx_pd + le16_to_cpu(uap_rx_pd->rx_pkt_offset); | |
246 | ||
247 | /* don't do packet forwarding in disconnected state */ | |
248 | if (!priv->media_connected) { | |
acebe8c1 ZL |
249 | mwifiex_dbg(adapter, ERROR, |
250 | "drop packet in disconnected state.\n"); | |
838e4f44 AP |
251 | dev_kfree_skb_any(skb); |
252 | return 0; | |
253 | } | |
254 | ||
255 | memcpy(ra, rx_pkt_hdr->eth803_hdr.h_dest, ETH_ALEN); | |
256 | ||
257 | if (is_multicast_ether_addr(ra)) { | |
258 | skb_uap = skb_copy(skb, GFP_ATOMIC); | |
259 | mwifiex_uap_queue_bridged_pkt(priv, skb_uap); | |
260 | } else { | |
261 | if (mwifiex_get_sta_entry(priv, ra)) { | |
262 | /* Requeue Intra-BSS packet */ | |
263 | mwifiex_uap_queue_bridged_pkt(priv, skb); | |
264 | return 0; | |
265 | } | |
266 | } | |
267 | ||
268 | /* Forward unicat/Inter-BSS packets to kernel. */ | |
f3b369e4 | 269 | return mwifiex_process_rx_packet(priv, skb); |
838e4f44 AP |
270 | } |
271 | ||
bf00dc22 XH |
272 | int mwifiex_uap_recv_packet(struct mwifiex_private *priv, |
273 | struct sk_buff *skb) | |
274 | { | |
3fdbda44 | 275 | struct mwifiex_adapter *adapter = priv->adapter; |
bf00dc22 XH |
276 | struct mwifiex_sta_node *src_node; |
277 | struct ethhdr *p_ethhdr; | |
278 | struct sk_buff *skb_uap; | |
279 | struct mwifiex_txinfo *tx_info; | |
280 | ||
281 | if (!skb) | |
282 | return -1; | |
283 | ||
284 | p_ethhdr = (void *)skb->data; | |
285 | src_node = mwifiex_get_sta_entry(priv, p_ethhdr->h_source); | |
286 | if (src_node) { | |
287 | src_node->stats.last_rx = jiffies; | |
288 | src_node->stats.rx_bytes += skb->len; | |
289 | src_node->stats.rx_packets++; | |
290 | } | |
291 | ||
292 | skb->dev = priv->netdev; | |
293 | skb->protocol = eth_type_trans(skb, priv->netdev); | |
294 | skb->ip_summed = CHECKSUM_NONE; | |
295 | ||
296 | /* This is required only in case of 11n and USB/PCIE as we alloc | |
297 | * a buffer of 4K only if its 11N (to be able to receive 4K | |
298 | * AMSDU packets). In case of SD we allocate buffers based | |
299 | * on the size of packet and hence this is not needed. | |
300 | * | |
301 | * Modifying the truesize here as our allocation for each | |
302 | * skb is 4K but we only receive 2K packets and this cause | |
303 | * the kernel to start dropping packets in case where | |
304 | * application has allocated buffer based on 2K size i.e. | |
305 | * if there a 64K packet received (in IP fragments and | |
306 | * application allocates 64K to receive this packet but | |
307 | * this packet would almost double up because we allocate | |
308 | * each 1.5K fragment in 4K and pass it up. As soon as the | |
309 | * 64K limit hits kernel will start to drop rest of the | |
310 | * fragments. Currently we fail the Filesndl-ht.scr script | |
311 | * for UDP, hence this fix | |
312 | */ | |
313 | if ((adapter->iface_type == MWIFIEX_USB || | |
314 | adapter->iface_type == MWIFIEX_PCIE) && | |
315 | (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE)) | |
316 | skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE); | |
317 | ||
318 | if (is_multicast_ether_addr(p_ethhdr->h_dest) || | |
319 | mwifiex_get_sta_entry(priv, p_ethhdr->h_dest)) { | |
320 | if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) | |
321 | skb_uap = | |
322 | skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN); | |
323 | else | |
324 | skb_uap = skb_copy(skb, GFP_ATOMIC); | |
325 | ||
326 | if (likely(skb_uap)) { | |
327 | tx_info = MWIFIEX_SKB_TXCB(skb_uap); | |
328 | memset(tx_info, 0, sizeof(*tx_info)); | |
329 | tx_info->bss_num = priv->bss_num; | |
330 | tx_info->bss_type = priv->bss_type; | |
331 | tx_info->flags |= MWIFIEX_BUF_FLAG_BRIDGED_PKT; | |
332 | __net_timestamp(skb_uap); | |
333 | mwifiex_wmm_add_buf_txqueue(priv, skb_uap); | |
334 | atomic_inc(&adapter->tx_pending); | |
335 | atomic_inc(&adapter->pending_bridged_pkts); | |
336 | if ((atomic_read(&adapter->pending_bridged_pkts) >= | |
337 | MWIFIEX_BRIDGED_PKTS_THR_HIGH)) { | |
338 | mwifiex_dbg(adapter, ERROR, | |
339 | "Tx: Bridge packet limit reached. Drop packet!\n"); | |
340 | mwifiex_uap_cleanup_tx_queues(priv); | |
341 | } | |
342 | ||
343 | } else { | |
344 | mwifiex_dbg(adapter, ERROR, "failed to allocate skb_uap"); | |
345 | } | |
346 | ||
347 | mwifiex_queue_main_work(adapter); | |
348 | /* Don't forward Intra-BSS unicast packet to upper layer*/ | |
349 | if (mwifiex_get_sta_entry(priv, p_ethhdr->h_dest)) | |
350 | return 0; | |
351 | } | |
352 | ||
353 | /* Forward multicast/broadcast packet to upper layer*/ | |
354 | if (in_interrupt()) | |
355 | netif_rx(skb); | |
356 | else | |
357 | netif_rx_ni(skb); | |
358 | ||
359 | return 0; | |
360 | } | |
361 | ||
838e4f44 AP |
362 | /* |
363 | * This function processes the packet received on AP interface. | |
364 | * | |
365 | * The function looks into the RxPD and performs sanity tests on the | |
366 | * received buffer to ensure its a valid packet before processing it | |
367 | * further. If the packet is determined to be aggregated, it is | |
368 | * de-aggregated accordingly. Then skb is passed to AP packet forwarding logic. | |
369 | * | |
370 | * The completion callback is called after processing is complete. | |
371 | */ | |
f3b369e4 | 372 | int mwifiex_process_uap_rx_packet(struct mwifiex_private *priv, |
838e4f44 AP |
373 | struct sk_buff *skb) |
374 | { | |
f3b369e4 | 375 | struct mwifiex_adapter *adapter = priv->adapter; |
838e4f44 AP |
376 | int ret; |
377 | struct uap_rxpd *uap_rx_pd; | |
838e4f44 AP |
378 | struct rx_packet_hdr *rx_pkt_hdr; |
379 | u16 rx_pkt_type; | |
d1cf3b95 | 380 | u8 ta[ETH_ALEN], pkt_type; |
c11fb985 | 381 | unsigned long flags; |
d1cf3b95 AP |
382 | struct mwifiex_sta_node *node; |
383 | ||
838e4f44 AP |
384 | uap_rx_pd = (struct uap_rxpd *)(skb->data); |
385 | rx_pkt_type = le16_to_cpu(uap_rx_pd->rx_pkt_type); | |
386 | rx_pkt_hdr = (void *)uap_rx_pd + le16_to_cpu(uap_rx_pd->rx_pkt_offset); | |
387 | ||
442f6f9b XH |
388 | ether_addr_copy(ta, rx_pkt_hdr->eth803_hdr.h_source); |
389 | ||
838e4f44 AP |
390 | if ((le16_to_cpu(uap_rx_pd->rx_pkt_offset) + |
391 | le16_to_cpu(uap_rx_pd->rx_pkt_length)) > (u16) skb->len) { | |
acebe8c1 ZL |
392 | mwifiex_dbg(adapter, ERROR, |
393 | "wrong rx packet: len=%d, offset=%d, length=%d\n", | |
394 | skb->len, le16_to_cpu(uap_rx_pd->rx_pkt_offset), | |
395 | le16_to_cpu(uap_rx_pd->rx_pkt_length)); | |
838e4f44 | 396 | priv->stats.rx_dropped++; |
442f6f9b XH |
397 | |
398 | node = mwifiex_get_sta_entry(priv, ta); | |
399 | if (node) | |
400 | node->stats.tx_failed++; | |
401 | ||
ca8d6dfc | 402 | dev_kfree_skb_any(skb); |
838e4f44 AP |
403 | return 0; |
404 | } | |
838e4f44 | 405 | |
4c9f9fb2 | 406 | if (rx_pkt_type == PKT_TYPE_MGMT) { |
f3b369e4 | 407 | ret = mwifiex_process_mgmt_packet(priv, skb); |
2dbaf751 | 408 | if (ret) |
bd642acf | 409 | mwifiex_dbg(adapter, DATA, "Rx of mgmt packet failed"); |
2dbaf751 SP |
410 | dev_kfree_skb_any(skb); |
411 | return ret; | |
d1cf3b95 AP |
412 | } |
413 | ||
d1cf3b95 AP |
414 | |
415 | if (rx_pkt_type != PKT_TYPE_BAR && uap_rx_pd->priority < MAX_NUM_TID) { | |
c11fb985 | 416 | spin_lock_irqsave(&priv->sta_list_spinlock, flags); |
d1cf3b95 AP |
417 | node = mwifiex_get_sta_entry(priv, ta); |
418 | if (node) | |
419 | node->rx_seq[uap_rx_pd->priority] = | |
420 | le16_to_cpu(uap_rx_pd->seq_num); | |
c11fb985 | 421 | spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); |
d1cf3b95 AP |
422 | } |
423 | ||
424 | if (!priv->ap_11n_enabled || | |
425 | (!mwifiex_11n_get_rx_reorder_tbl(priv, uap_rx_pd->priority, ta) && | |
426 | (le16_to_cpu(uap_rx_pd->rx_pkt_type) != PKT_TYPE_AMSDU))) { | |
427 | ret = mwifiex_handle_uap_rx_forward(priv, skb); | |
428 | return ret; | |
429 | } | |
430 | ||
431 | /* Reorder and send to kernel */ | |
432 | pkt_type = (u8)le16_to_cpu(uap_rx_pd->rx_pkt_type); | |
433 | ret = mwifiex_11n_rx_reorder_pkt(priv, le16_to_cpu(uap_rx_pd->seq_num), | |
434 | uap_rx_pd->priority, ta, pkt_type, | |
435 | skb); | |
436 | ||
ca8d6dfc UR |
437 | if (ret || (rx_pkt_type == PKT_TYPE_BAR)) |
438 | dev_kfree_skb_any(skb); | |
838e4f44 | 439 | |
d1cf3b95 AP |
440 | if (ret) |
441 | priv->stats.rx_dropped++; | |
442 | ||
838e4f44 AP |
443 | return ret; |
444 | } | |
4ac8764a AP |
445 | |
446 | /* | |
447 | * This function fills the TxPD for AP tx packets. | |
448 | * | |
449 | * The Tx buffer received by this function should already have the | |
450 | * header space allocated for TxPD. | |
451 | * | |
452 | * This function inserts the TxPD in between interface header and actual | |
453 | * data and adjusts the buffer pointers accordingly. | |
454 | * | |
455 | * The following TxPD fields are set by this function, as required - | |
456 | * - BSS number | |
457 | * - Tx packet length and offset | |
458 | * - Priority | |
459 | * - Packet delay | |
460 | * - Priority specific Tx control | |
461 | * - Flags | |
462 | */ | |
463 | void *mwifiex_process_uap_txpd(struct mwifiex_private *priv, | |
464 | struct sk_buff *skb) | |
465 | { | |
466 | struct mwifiex_adapter *adapter = priv->adapter; | |
467 | struct uap_txpd *txpd; | |
468 | struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb); | |
84b313b3 XH |
469 | int pad; |
470 | u16 pkt_type, pkt_offset; | |
471 | int hroom = (priv->adapter->iface_type == MWIFIEX_USB) ? 0 : | |
472 | INTF_HEADER_LEN; | |
4ac8764a AP |
473 | |
474 | if (!skb->len) { | |
acebe8c1 ZL |
475 | mwifiex_dbg(adapter, ERROR, |
476 | "Tx: bad packet length: %d\n", skb->len); | |
4ac8764a AP |
477 | tx_info->status_code = -1; |
478 | return skb->data; | |
479 | } | |
480 | ||
84b313b3 | 481 | BUG_ON(skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN); |
4ac8764a | 482 | |
84b313b3 | 483 | pkt_type = mwifiex_is_skb_mgmt_frame(skb) ? PKT_TYPE_MGMT : 0; |
4ac8764a | 484 | |
84b313b3 XH |
485 | pad = ((void *)skb->data - (sizeof(*txpd) + hroom) - NULL) & |
486 | (MWIFIEX_DMA_ALIGN_SZ - 1); | |
4ac8764a | 487 | |
84b313b3 | 488 | skb_push(skb, sizeof(*txpd) + pad); |
4ac8764a AP |
489 | |
490 | txpd = (struct uap_txpd *)skb->data; | |
491 | memset(txpd, 0, sizeof(*txpd)); | |
492 | txpd->bss_num = priv->bss_num; | |
493 | txpd->bss_type = priv->bss_type; | |
84b313b3 XH |
494 | txpd->tx_pkt_length = cpu_to_le16((u16)(skb->len - (sizeof(*txpd) + |
495 | pad))); | |
4ac8764a | 496 | txpd->priority = (u8)skb->priority; |
808bbebc | 497 | |
4ac8764a AP |
498 | txpd->pkt_delay_2ms = mwifiex_wmm_compute_drv_pkt_delay(priv, skb); |
499 | ||
18ca4382 AK |
500 | if (tx_info->flags & MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS || |
501 | tx_info->flags & MWIFIEX_BUF_FLAG_ACTION_TX_STATUS) { | |
808bbebc AK |
502 | txpd->tx_token_id = tx_info->ack_frame_id; |
503 | txpd->flags |= MWIFIEX_TXPD_FLAGS_REQ_TX_STATUS; | |
504 | } | |
505 | ||
4ac8764a AP |
506 | if (txpd->priority < ARRAY_SIZE(priv->wmm.user_pri_pkt_tx_ctrl)) |
507 | /* | |
508 | * Set the priority specific tx_control field, setting of 0 will | |
509 | * cause the default value to be used later in this function. | |
510 | */ | |
511 | txpd->tx_control = | |
512 | cpu_to_le32(priv->wmm.user_pri_pkt_tx_ctrl[txpd->priority]); | |
513 | ||
514 | /* Offset of actual data */ | |
84b313b3 | 515 | pkt_offset = sizeof(*txpd) + pad; |
3215215a SP |
516 | if (pkt_type == PKT_TYPE_MGMT) { |
517 | /* Set the packet type and add header for management frame */ | |
518 | txpd->tx_pkt_type = cpu_to_le16(pkt_type); | |
84b313b3 | 519 | pkt_offset += MWIFIEX_MGMT_FRAME_HEADER_SIZE; |
3215215a SP |
520 | } |
521 | ||
84b313b3 | 522 | txpd->tx_pkt_offset = cpu_to_le16(pkt_offset); |
4ac8764a AP |
523 | |
524 | /* make space for INTF_HEADER_LEN */ | |
84b313b3 | 525 | skb_push(skb, hroom); |
4ac8764a AP |
526 | |
527 | if (!txpd->tx_control) | |
528 | /* TxCtrl set by user or default */ | |
529 | txpd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl); | |
530 | ||
531 | return skb->data; | |
532 | } |