1 /******************************************************************************
3 Copyright(c) 2003 - 2004 Intel Corporation. All rights reserved.
5 This program is free software; you can redistribute it and/or modify it
6 under the terms of version 2 of the GNU General Public License as
7 published by the Free Software Foundation.
9 This program is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 You should have received a copy of the GNU General Public License along with
15 this program; if not, write to the Free Software Foundation, Inc., 59
16 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 The full GNU General Public License is included in this distribution in the
22 James P. Ketrenos <ipw2100-admin@linux.intel.com>
23 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 ******************************************************************************
27 Few modifications for Realtek's Wi-Fi drivers by
28 Andrea Merello <andrea.merello@gmail.com>
30 A special thanks goes to Realtek for their support !
32 ******************************************************************************/
34 #include <linux/compiler.h>
35 #include <linux/errno.h>
36 #include <linux/if_arp.h>
37 #include <linux/in6.h>
40 #include <linux/kernel.h>
41 #include <linux/module.h>
42 #include <linux/netdevice.h>
43 #include <linux/pci.h>
44 #include <linux/proc_fs.h>
45 #include <linux/skbuff.h>
46 #include <linux/slab.h>
47 #include <linux/tcp.h>
48 #include <linux/types.h>
49 #include <linux/wireless.h>
50 #include <linux/etherdevice.h>
51 #include <linux/uaccess.h>
52 #include <linux/if_vlan.h>
59 * 802.11 frame_control for data frames - 2 bytes
60 * ,--------------------------------------------------------------------.
61 * bits | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | a | b | c | d | e |
62 * |---|---|---|---|---|---|---|---|---|----|----|-----|-----|-----|----|
63 * val | 0 | 0 | 0 | 1 | x | 0 | 0 | 0 | 1 | 0 | x | x | x | x | x |
64 * |---|---|---|---|---|---|---|---|---|----|----|-----|-----|-----|----|
65 * desc | ver | type | ^-subtype-^ |to |from|more|retry| pwr |more |wep |
66 * | | | x=0 data |DS | DS |frag| | mgm |data | |
67 * | | | x=1 data+ack | | | | | | | |
68 * '--------------------------------------------------------------------'
72 * ,--------- 'ctrl' expands to >---'
74 * ,--'---,-------------------------------------------------------------.
75 * Bytes | 2 | 2 | 6 | 6 | 6 | 2 | 0..2312 | 4 |
76 * |------|------|---------|---------|---------|------|---------|------|
77 * Desc. | ctrl | dura | DA/RA | TA | SA | Sequ | Frame | fcs |
78 * | | tion | (BSSID) | | | ence | data | |
79 * `--------------------------------------------------| |------'
80 * Total: 28 non-data bytes `----.----'
82 * .- 'Frame data' expands to <---------------------------'
85 * ,---------------------------------------------------.
86 * Bytes | 1 | 1 | 1 | 3 | 2 | 0-2304 |
87 * |------|------|---------|----------|------|---------|
88 * Desc. | SNAP | SNAP | Control |Eth Tunnel| Type | IP |
89 * | DSAP | SSAP | | | | Packet |
90 * | 0xAA | 0xAA |0x03 (UI)|0x00-00-F8| | |
91 * `-----------------------------------------| |
92 * Total: 8 non-data bytes `----.----'
94 * .- 'IP Packet' expands, if WEP enabled, to <--'
97 * ,-----------------------.
98 * Bytes | 4 | 0-2296 | 4 |
99 * |-----|-----------|-----|
100 * Desc. | IV | Encrypted | ICV |
102 * `-----------------------'
103 * Total: 8 non-data bytes
106 * 802.3 Ethernet Data Frame
108 * ,-----------------------------------------.
109 * Bytes | 6 | 6 | 2 | Variable | 4 |
110 * |-------|-------|------|-----------|------|
111 * Desc. | Dest. | Source| Type | IP Packet | fcs |
112 * | MAC | MAC | | | |
113 * `-----------------------------------------'
114 * Total: 18 non-data bytes
116 * In the event that fragmentation is required, the incoming payload is split
117 * into N parts of size ieee->fts. The first fragment contains the SNAP header
118 * and the remaining packets are just data.
120 * If encryption is enabled, each fragment payload size is reduced by enough
121 * space to add the prefix and postfix (IV and ICV totalling 8 bytes in
122 * the case of WEP) So if you have 1500 bytes of payload with ieee->fts set to
123 * 500 without encryption it will take 3 frames. With WEP it will take 4 frames
124 * as the payload of each frame is reduced to 492 bytes.
130 * | ETHERNET HEADER ,-<-- PAYLOAD
131 * | | 14 bytes from skb->data
132 * | 2 bytes for Type --> ,T. | (sizeof ethhdr)
134 * |,-Dest.--. ,--Src.---. | | |
135 * | 6 bytes| | 6 bytes | | | |
138 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
141 * | | | | `T' <---- 2 bytes for Type
143 * | | '---SNAP--' <-------- 6 bytes for SNAP
145 * `-IV--' <-------------------- 4 bytes for IV (WEP)
151 static u8 P802_1H_OUI
[P80211_OUI_LEN
] = { 0x00, 0x00, 0xf8 };
152 static u8 RFC1042_OUI
[P80211_OUI_LEN
] = { 0x00, 0x00, 0x00 };
154 static int rtllib_put_snap(u8
*data
, u16 h_proto
)
156 struct rtllib_snap_hdr
*snap
;
159 snap
= (struct rtllib_snap_hdr
*)data
;
164 if (h_proto
== 0x8137 || h_proto
== 0x80f3)
168 snap
->oui
[0] = oui
[0];
169 snap
->oui
[1] = oui
[1];
170 snap
->oui
[2] = oui
[2];
172 *(__be16
*)(data
+ SNAP_SIZE
) = htons(h_proto
);
174 return SNAP_SIZE
+ sizeof(u16
);
177 int rtllib_encrypt_fragment(struct rtllib_device
*ieee
, struct sk_buff
*frag
,
180 struct lib80211_crypt_data
*crypt
= NULL
;
183 crypt
= ieee
->crypt_info
.crypt
[ieee
->crypt_info
.tx_keyidx
];
185 if (!(crypt
&& crypt
->ops
)) {
186 netdev_info(ieee
->dev
, "=========>%s(), crypt is null\n",
190 /* To encrypt, frame format is:
191 * IV (4 bytes), clear payload (including SNAP), ICV (4 bytes)
194 /* Host-based IEEE 802.11 fragmentation for TX is not yet supported, so
195 * call both MSDU and MPDU encryption functions from here.
197 atomic_inc(&crypt
->refcnt
);
199 if (crypt
->ops
->encrypt_msdu
)
200 res
= crypt
->ops
->encrypt_msdu(frag
, hdr_len
, crypt
->priv
);
201 if (res
== 0 && crypt
->ops
->encrypt_mpdu
)
202 res
= crypt
->ops
->encrypt_mpdu(frag
, hdr_len
, crypt
->priv
);
204 atomic_dec(&crypt
->refcnt
);
206 netdev_info(ieee
->dev
, "%s: Encryption failed: len=%d.\n",
207 ieee
->dev
->name
, frag
->len
);
215 void rtllib_txb_free(struct rtllib_txb
*txb
)
222 static struct rtllib_txb
*rtllib_alloc_txb(int nr_frags
, int txb_size
,
225 struct rtllib_txb
*txb
;
228 txb
= kmalloc(sizeof(struct rtllib_txb
) + (sizeof(u8
*) * nr_frags
),
233 memset(txb
, 0, sizeof(struct rtllib_txb
));
234 txb
->nr_frags
= nr_frags
;
235 txb
->frag_size
= cpu_to_le16(txb_size
);
237 for (i
= 0; i
< nr_frags
; i
++) {
238 txb
->fragments
[i
] = dev_alloc_skb(txb_size
);
239 if (unlikely(!txb
->fragments
[i
])) {
243 memset(txb
->fragments
[i
]->cb
, 0, sizeof(txb
->fragments
[i
]->cb
));
245 if (unlikely(i
!= nr_frags
)) {
247 dev_kfree_skb_any(txb
->fragments
[i
--]);
254 static int rtllib_classify(struct sk_buff
*skb
, u8 bIsAmsdu
)
259 eth
= (struct ethhdr
*)skb
->data
;
260 if (eth
->h_proto
!= htons(ETH_P_IP
))
264 print_hex_dump_bytes("rtllib_classify(): ", DUMP_PREFIX_NONE
, skb
->data
,
268 switch (ip
->tos
& 0xfc) {
288 static void rtllib_tx_query_agg_cap(struct rtllib_device
*ieee
,
290 struct cb_desc
*tcb_desc
)
292 struct rt_hi_throughput
*pHTInfo
= ieee
->pHTInfo
;
293 struct tx_ts_record
*pTxTs
= NULL
;
294 struct rtllib_hdr_1addr
*hdr
= (struct rtllib_hdr_1addr
*)skb
->data
;
296 if (rtllib_act_scanning(ieee
, false))
299 if (!pHTInfo
->bCurrentHTSupport
|| !pHTInfo
->bEnableHT
)
301 if (!IsQoSDataFrame(skb
->data
))
303 if (is_multicast_ether_addr(hdr
->addr1
))
306 if (tcb_desc
->bdhcp
|| ieee
->CntAfterLink
< 2)
309 if (pHTInfo
->IOTAction
& HT_IOT_ACT_TX_NO_AGGREGATION
)
312 if (!ieee
->GetNmodeSupportBySecCfg(ieee
->dev
))
314 if (pHTInfo
->bCurrentAMPDUEnable
) {
315 if (!GetTs(ieee
, (struct ts_common_info
**)(&pTxTs
), hdr
->addr1
,
316 skb
->priority
, TX_DIR
, true)) {
317 netdev_info(ieee
->dev
, "%s: can't get TS\n", __func__
);
320 if (pTxTs
->TxAdmittedBARecord
.bValid
== false) {
321 if (ieee
->wpa_ie_len
&& (ieee
->pairwise_key_type
==
324 } else if (tcb_desc
->bdhcp
== 1) {
326 } else if (!pTxTs
->bDisable_AddBa
) {
327 TsStartAddBaProcess(ieee
, pTxTs
);
329 goto FORCED_AGG_SETTING
;
330 } else if (pTxTs
->bUsingBa
== false) {
331 if (SN_LESS(pTxTs
->TxAdmittedBARecord
.BaStartSeqCtrl
.field
.SeqNum
,
332 (pTxTs
->TxCurSeq
+1)%4096))
333 pTxTs
->bUsingBa
= true;
335 goto FORCED_AGG_SETTING
;
337 if (ieee
->iw_mode
== IW_MODE_INFRA
) {
338 tcb_desc
->bAMPDUEnable
= true;
339 tcb_desc
->ampdu_factor
= pHTInfo
->CurrentAMPDUFactor
;
340 tcb_desc
->ampdu_density
= pHTInfo
->CurrentMPDUDensity
;
344 switch (pHTInfo
->ForcedAMPDUMode
) {
348 case HT_AGG_FORCE_ENABLE
:
349 tcb_desc
->bAMPDUEnable
= true;
350 tcb_desc
->ampdu_density
= pHTInfo
->ForcedMPDUDensity
;
351 tcb_desc
->ampdu_factor
= pHTInfo
->ForcedAMPDUFactor
;
354 case HT_AGG_FORCE_DISABLE
:
355 tcb_desc
->bAMPDUEnable
= false;
356 tcb_desc
->ampdu_density
= 0;
357 tcb_desc
->ampdu_factor
= 0;
362 static void rtllib_qurey_ShortPreambleMode(struct rtllib_device
*ieee
,
363 struct cb_desc
*tcb_desc
)
365 tcb_desc
->bUseShortPreamble
= false;
366 if (tcb_desc
->data_rate
== 2)
368 else if (ieee
->current_network
.capability
&
369 WLAN_CAPABILITY_SHORT_PREAMBLE
)
370 tcb_desc
->bUseShortPreamble
= true;
373 static void rtllib_query_HTCapShortGI(struct rtllib_device
*ieee
,
374 struct cb_desc
*tcb_desc
)
376 struct rt_hi_throughput
*pHTInfo
= ieee
->pHTInfo
;
378 tcb_desc
->bUseShortGI
= false;
380 if (!pHTInfo
->bCurrentHTSupport
|| !pHTInfo
->bEnableHT
)
383 if (pHTInfo
->bForcedShortGI
) {
384 tcb_desc
->bUseShortGI
= true;
388 if ((pHTInfo
->bCurBW40MHz
== true) && pHTInfo
->bCurShortGI40MHz
)
389 tcb_desc
->bUseShortGI
= true;
390 else if ((pHTInfo
->bCurBW40MHz
== false) && pHTInfo
->bCurShortGI20MHz
)
391 tcb_desc
->bUseShortGI
= true;
394 static void rtllib_query_BandwidthMode(struct rtllib_device
*ieee
,
395 struct cb_desc
*tcb_desc
)
397 struct rt_hi_throughput
*pHTInfo
= ieee
->pHTInfo
;
399 tcb_desc
->bPacketBW
= false;
401 if (!pHTInfo
->bCurrentHTSupport
|| !pHTInfo
->bEnableHT
)
404 if (tcb_desc
->bMulticast
|| tcb_desc
->bBroadcast
)
407 if ((tcb_desc
->data_rate
& 0x80) == 0)
409 if (pHTInfo
->bCurBW40MHz
&& pHTInfo
->bCurTxBW40MHz
&&
410 !ieee
->bandwidth_auto_switch
.bforced_tx20Mhz
)
411 tcb_desc
->bPacketBW
= true;
414 static void rtllib_query_protectionmode(struct rtllib_device
*ieee
,
415 struct cb_desc
*tcb_desc
,
418 struct rt_hi_throughput
*pHTInfo
;
420 tcb_desc
->bRTSSTBC
= false;
421 tcb_desc
->bRTSUseShortGI
= false;
422 tcb_desc
->bCTSEnable
= false;
424 tcb_desc
->bRTSBW
= false;
426 if (tcb_desc
->bBroadcast
|| tcb_desc
->bMulticast
)
429 if (is_broadcast_ether_addr(skb
->data
+16))
432 if (ieee
->mode
< IEEE_N_24G
) {
433 if (skb
->len
> ieee
->rts
) {
434 tcb_desc
->bRTSEnable
= true;
435 tcb_desc
->rts_rate
= MGN_24M
;
436 } else if (ieee
->current_network
.buseprotection
) {
437 tcb_desc
->bRTSEnable
= true;
438 tcb_desc
->bCTSEnable
= true;
439 tcb_desc
->rts_rate
= MGN_24M
;
444 pHTInfo
= ieee
->pHTInfo
;
447 if (pHTInfo
->IOTAction
& HT_IOT_ACT_FORCED_CTS2SELF
) {
448 tcb_desc
->bCTSEnable
= true;
449 tcb_desc
->rts_rate
= MGN_24M
;
450 tcb_desc
->bRTSEnable
= true;
452 } else if (pHTInfo
->IOTAction
& (HT_IOT_ACT_FORCED_RTS
|
453 HT_IOT_ACT_PURE_N_MODE
)) {
454 tcb_desc
->bRTSEnable
= true;
455 tcb_desc
->rts_rate
= MGN_24M
;
458 if (ieee
->current_network
.buseprotection
) {
459 tcb_desc
->bRTSEnable
= true;
460 tcb_desc
->bCTSEnable
= true;
461 tcb_desc
->rts_rate
= MGN_24M
;
464 if (pHTInfo
->bCurrentHTSupport
&& pHTInfo
->bEnableHT
) {
465 u8 HTOpMode
= pHTInfo
->CurrentOpMode
;
467 if ((pHTInfo
->bCurBW40MHz
&& (HTOpMode
== 2 ||
469 (!pHTInfo
->bCurBW40MHz
&& HTOpMode
== 3)) {
470 tcb_desc
->rts_rate
= MGN_24M
;
471 tcb_desc
->bRTSEnable
= true;
475 if (skb
->len
> ieee
->rts
) {
476 tcb_desc
->rts_rate
= MGN_24M
;
477 tcb_desc
->bRTSEnable
= true;
480 if (tcb_desc
->bAMPDUEnable
) {
481 tcb_desc
->rts_rate
= MGN_24M
;
482 tcb_desc
->bRTSEnable
= false;
487 if (ieee
->current_network
.capability
& WLAN_CAPABILITY_SHORT_PREAMBLE
)
488 tcb_desc
->bUseShortPreamble
= true;
489 if (ieee
->iw_mode
== IW_MODE_MASTER
)
493 tcb_desc
->bRTSEnable
= false;
494 tcb_desc
->bCTSEnable
= false;
495 tcb_desc
->rts_rate
= 0;
497 tcb_desc
->bRTSBW
= false;
501 static void rtllib_txrate_selectmode(struct rtllib_device
*ieee
,
502 struct cb_desc
*tcb_desc
)
504 if (ieee
->bTxDisableRateFallBack
)
505 tcb_desc
->bTxDisableRateFallBack
= true;
507 if (ieee
->bTxUseDriverAssingedRate
)
508 tcb_desc
->bTxUseDriverAssingedRate
= true;
509 if (!tcb_desc
->bTxDisableRateFallBack
||
510 !tcb_desc
->bTxUseDriverAssingedRate
) {
511 if (ieee
->iw_mode
== IW_MODE_INFRA
||
512 ieee
->iw_mode
== IW_MODE_ADHOC
)
513 tcb_desc
->RATRIndex
= 0;
517 static u16
rtllib_query_seqnum(struct rtllib_device
*ieee
, struct sk_buff
*skb
,
522 if (is_multicast_ether_addr(dst
))
524 if (IsQoSDataFrame(skb
->data
)) {
525 struct tx_ts_record
*pTS
= NULL
;
527 if (!GetTs(ieee
, (struct ts_common_info
**)(&pTS
), dst
,
528 skb
->priority
, TX_DIR
, true))
530 seqnum
= pTS
->TxCurSeq
;
531 pTS
->TxCurSeq
= (pTS
->TxCurSeq
+1)%4096;
537 static int wme_downgrade_ac(struct sk_buff
*skb
)
539 switch (skb
->priority
) {
542 skb
->priority
= 5; /* VO -> VI */
546 skb
->priority
= 3; /* VI -> BE */
550 skb
->priority
= 1; /* BE -> BK */
557 static u8
rtllib_current_rate(struct rtllib_device
*ieee
)
559 if (ieee
->mode
& IEEE_MODE_MASK
)
562 if (ieee
->HTCurrentOperaRate
)
563 return ieee
->HTCurrentOperaRate
;
565 return ieee
->rate
& 0x7F;
568 static int rtllib_xmit_inter(struct sk_buff
*skb
, struct net_device
*dev
)
570 struct rtllib_device
*ieee
= (struct rtllib_device
*)
571 netdev_priv_rsl(dev
);
572 struct rtllib_txb
*txb
= NULL
;
573 struct rtllib_hdr_3addrqos
*frag_hdr
;
574 int i
, bytes_per_frag
, nr_frags
, bytes_last_frag
, frag_size
;
576 struct net_device_stats
*stats
= &ieee
->stats
;
577 int ether_type
= 0, encrypt
;
578 int bytes
, fc
, qos_ctl
= 0, hdr_len
;
579 struct sk_buff
*skb_frag
;
580 struct rtllib_hdr_3addrqos header
= { /* Ensure zero initialized */
585 int qos_actived
= ieee
->current_network
.qos_data
.active
;
588 struct lib80211_crypt_data
*crypt
= NULL
;
589 struct cb_desc
*tcb_desc
;
590 u8 bIsMulticast
= false;
594 spin_lock_irqsave(&ieee
->lock
, flags
);
596 /* If there is no driver handler to take the TXB, don't bother
599 if ((!ieee
->hard_start_xmit
&& !(ieee
->softmac_features
&
600 IEEE_SOFTMAC_TX_QUEUE
)) ||
601 ((!ieee
->softmac_data_hard_start_xmit
&&
602 (ieee
->softmac_features
& IEEE_SOFTMAC_TX_QUEUE
)))) {
603 netdev_warn(ieee
->dev
, "No xmit handler.\n");
608 if (likely(ieee
->raw_tx
== 0)) {
609 if (unlikely(skb
->len
< SNAP_SIZE
+ sizeof(u16
))) {
610 netdev_warn(ieee
->dev
, "skb too small (%d).\n",
614 /* Save source and destination addresses */
615 ether_addr_copy(dest
, skb
->data
);
616 ether_addr_copy(src
, skb
->data
+ ETH_ALEN
);
618 memset(skb
->cb
, 0, sizeof(skb
->cb
));
619 ether_type
= ntohs(((struct ethhdr
*)skb
->data
)->h_proto
);
621 if (ieee
->iw_mode
== IW_MODE_MONITOR
) {
622 txb
= rtllib_alloc_txb(1, skb
->len
, GFP_ATOMIC
);
623 if (unlikely(!txb
)) {
624 netdev_warn(ieee
->dev
,
625 "Could not allocate TXB\n");
630 txb
->payload_size
= cpu_to_le16(skb
->len
);
631 memcpy(skb_put(txb
->fragments
[0], skb
->len
), skb
->data
,
637 if (skb
->len
> 282) {
638 if (ETH_P_IP
== ether_type
) {
639 const struct iphdr
*ip
= (struct iphdr
*)
640 ((u8
*)skb
->data
+14);
641 if (IPPROTO_UDP
== ip
->protocol
) {
644 udp
= (struct udphdr
*)((u8
*)ip
+
646 if (((((u8
*)udp
)[1] == 68) &&
647 (((u8
*)udp
)[3] == 67)) ||
648 ((((u8
*)udp
)[1] == 67) &&
649 (((u8
*)udp
)[3] == 68))) {
651 ieee
->LPSDelayCnt
= 200;
654 } else if (ETH_P_ARP
== ether_type
) {
655 netdev_info(ieee
->dev
,
656 "=================>DHCP Protocol start tx ARP pkt!!\n");
659 ieee
->current_network
.tim
.tim_count
;
663 skb
->priority
= rtllib_classify(skb
, IsAmsdu
);
664 crypt
= ieee
->crypt_info
.crypt
[ieee
->crypt_info
.tx_keyidx
];
665 encrypt
= !(ether_type
== ETH_P_PAE
&& ieee
->ieee802_1x
) &&
666 ieee
->host_encrypt
&& crypt
&& crypt
->ops
;
667 if (!encrypt
&& ieee
->ieee802_1x
&&
668 ieee
->drop_unencrypted
&& ether_type
!= ETH_P_PAE
) {
672 if (crypt
&& !encrypt
&& ether_type
== ETH_P_PAE
) {
673 struct eapol
*eap
= (struct eapol
*)(skb
->data
+
674 sizeof(struct ethhdr
) - SNAP_SIZE
-
676 netdev_dbg(ieee
->dev
,
677 "TX: IEEE 802.11 EAPOL frame: %s\n",
678 eap_get_type(eap
->type
));
681 /* Advance the SKB to the start of the payload */
682 skb_pull(skb
, sizeof(struct ethhdr
));
684 /* Determine total amount of storage required for TXB packets */
685 bytes
= skb
->len
+ SNAP_SIZE
+ sizeof(u16
);
688 fc
= RTLLIB_FTYPE_DATA
| RTLLIB_FCTL_WEP
;
690 fc
= RTLLIB_FTYPE_DATA
;
693 fc
|= RTLLIB_STYPE_QOS_DATA
;
695 fc
|= RTLLIB_STYPE_DATA
;
697 if (ieee
->iw_mode
== IW_MODE_INFRA
) {
698 fc
|= RTLLIB_FCTL_TODS
;
699 /* To DS: Addr1 = BSSID, Addr2 = SA,
702 ether_addr_copy(header
.addr1
,
703 ieee
->current_network
.bssid
);
704 ether_addr_copy(header
.addr2
, src
);
706 ether_addr_copy(header
.addr3
,
707 ieee
->current_network
.bssid
);
709 ether_addr_copy(header
.addr3
, dest
);
710 } else if (ieee
->iw_mode
== IW_MODE_ADHOC
) {
711 /* not From/To DS: Addr1 = DA, Addr2 = SA,
714 ether_addr_copy(header
.addr1
, dest
);
715 ether_addr_copy(header
.addr2
, src
);
716 ether_addr_copy(header
.addr3
,
717 ieee
->current_network
.bssid
);
720 bIsMulticast
= is_multicast_ether_addr(header
.addr1
);
722 header
.frame_ctl
= cpu_to_le16(fc
);
724 /* Determine fragmentation size based on destination (multicast
725 * and broadcast are not fragmented)
728 frag_size
= MAX_FRAG_THRESHOLD
;
729 qos_ctl
|= QOS_CTL_NOTCONTAIN_ACK
;
731 frag_size
= ieee
->fts
;
736 hdr_len
= RTLLIB_3ADDR_LEN
+ 2;
738 /* in case we are a client verify acm is not set for this ac */
739 while (unlikely(ieee
->wmm_acm
& (0x01 << skb
->priority
))) {
740 netdev_info(ieee
->dev
, "skb->priority = %x\n",
742 if (wme_downgrade_ac(skb
))
744 netdev_info(ieee
->dev
, "converted skb->priority = %x\n",
747 qos_ctl
|= skb
->priority
;
748 header
.qos_ctl
= cpu_to_le16(qos_ctl
& RTLLIB_QOS_TID
);
750 hdr_len
= RTLLIB_3ADDR_LEN
;
752 /* Determine amount of payload per fragment. Regardless of if
753 * this stack is providing the full 802.11 header, one will
754 * eventually be affixed to this fragment -- so we must account
755 * for it when determining the amount of payload space.
757 bytes_per_frag
= frag_size
- hdr_len
;
759 (CFG_RTLLIB_COMPUTE_FCS
| CFG_RTLLIB_RESERVE_FCS
))
760 bytes_per_frag
-= RTLLIB_FCS_LEN
;
762 /* Each fragment may need to have room for encrypting
766 bytes_per_frag
-= crypt
->ops
->extra_mpdu_prefix_len
+
767 crypt
->ops
->extra_mpdu_postfix_len
+
768 crypt
->ops
->extra_msdu_prefix_len
+
769 crypt
->ops
->extra_msdu_postfix_len
;
771 /* Number of fragments is the total bytes_per_frag /
772 * payload_per_fragment
774 nr_frags
= bytes
/ bytes_per_frag
;
775 bytes_last_frag
= bytes
% bytes_per_frag
;
779 bytes_last_frag
= bytes_per_frag
;
781 /* When we allocate the TXB we allocate enough space for the
782 * reserve and full fragment bytes (bytes_per_frag doesn't
783 * include prefix, postfix, header, FCS, etc.)
785 txb
= rtllib_alloc_txb(nr_frags
, frag_size
+
786 ieee
->tx_headroom
, GFP_ATOMIC
);
787 if (unlikely(!txb
)) {
788 netdev_warn(ieee
->dev
, "Could not allocate TXB\n");
791 txb
->encrypted
= encrypt
;
792 txb
->payload_size
= cpu_to_le16(bytes
);
795 txb
->queue_index
= UP2AC(skb
->priority
);
797 txb
->queue_index
= WME_AC_BE
;
799 for (i
= 0; i
< nr_frags
; i
++) {
800 skb_frag
= txb
->fragments
[i
];
801 tcb_desc
= (struct cb_desc
*)(skb_frag
->cb
+
804 skb_frag
->priority
= skb
->priority
;
805 tcb_desc
->queue_index
= UP2AC(skb
->priority
);
807 skb_frag
->priority
= WME_AC_BE
;
808 tcb_desc
->queue_index
= WME_AC_BE
;
810 skb_reserve(skb_frag
, ieee
->tx_headroom
);
813 if (ieee
->hwsec_active
)
814 tcb_desc
->bHwSec
= 1;
816 tcb_desc
->bHwSec
= 0;
817 skb_reserve(skb_frag
,
818 crypt
->ops
->extra_mpdu_prefix_len
+
819 crypt
->ops
->extra_msdu_prefix_len
);
821 tcb_desc
->bHwSec
= 0;
823 frag_hdr
= (struct rtllib_hdr_3addrqos
*)
824 skb_put(skb_frag
, hdr_len
);
825 memcpy(frag_hdr
, &header
, hdr_len
);
827 /* If this is not the last fragment, then add the
828 * MOREFRAGS bit to the frame control
830 if (i
!= nr_frags
- 1) {
831 frag_hdr
->frame_ctl
= cpu_to_le16(
832 fc
| RTLLIB_FCTL_MOREFRAGS
);
833 bytes
= bytes_per_frag
;
836 /* The last fragment has the remaining length */
837 bytes
= bytes_last_frag
;
839 if ((qos_actived
) && (!bIsMulticast
)) {
841 cpu_to_le16(rtllib_query_seqnum(ieee
, skb_frag
,
844 cpu_to_le16(le16_to_cpu(frag_hdr
->seq_ctl
)<<4 | i
);
847 cpu_to_le16(ieee
->seq_ctrl
[0]<<4 | i
);
849 /* Put a SNAP header on the first fragment */
852 skb_put(skb_frag
, SNAP_SIZE
+
853 sizeof(u16
)), ether_type
);
854 bytes
-= SNAP_SIZE
+ sizeof(u16
);
857 memcpy(skb_put(skb_frag
, bytes
), skb
->data
, bytes
);
859 /* Advance the SKB... */
860 skb_pull(skb
, bytes
);
862 /* Encryption routine will move the header forward in
863 * order to insert the IV between the header and the
867 rtllib_encrypt_fragment(ieee
, skb_frag
,
870 (CFG_RTLLIB_COMPUTE_FCS
| CFG_RTLLIB_RESERVE_FCS
))
871 skb_put(skb_frag
, 4);
874 if ((qos_actived
) && (!bIsMulticast
)) {
875 if (ieee
->seq_ctrl
[UP2AC(skb
->priority
) + 1] == 0xFFF)
876 ieee
->seq_ctrl
[UP2AC(skb
->priority
) + 1] = 0;
878 ieee
->seq_ctrl
[UP2AC(skb
->priority
) + 1]++;
880 if (ieee
->seq_ctrl
[0] == 0xFFF)
881 ieee
->seq_ctrl
[0] = 0;
886 if (unlikely(skb
->len
< sizeof(struct rtllib_hdr_3addr
))) {
887 netdev_warn(ieee
->dev
, "skb too small (%d).\n",
892 txb
= rtllib_alloc_txb(1, skb
->len
, GFP_ATOMIC
);
894 netdev_warn(ieee
->dev
, "Could not allocate TXB\n");
899 txb
->payload_size
= cpu_to_le16(skb
->len
);
900 memcpy(skb_put(txb
->fragments
[0], skb
->len
), skb
->data
,
906 struct cb_desc
*tcb_desc
= (struct cb_desc
*)
907 (txb
->fragments
[0]->cb
+ MAX_DEV_ADDR_SIZE
);
908 tcb_desc
->bTxEnableFwCalcDur
= 1;
909 tcb_desc
->priority
= skb
->priority
;
911 if (ether_type
== ETH_P_PAE
) {
912 if (ieee
->pHTInfo
->IOTAction
&
913 HT_IOT_ACT_WA_IOT_Broadcom
) {
914 tcb_desc
->data_rate
=
915 MgntQuery_TxRateExcludeCCKRates(ieee
);
916 tcb_desc
->bTxDisableRateFallBack
= false;
918 tcb_desc
->data_rate
= ieee
->basic_rate
;
919 tcb_desc
->bTxDisableRateFallBack
= 1;
923 tcb_desc
->RATRIndex
= 7;
924 tcb_desc
->bTxUseDriverAssingedRate
= 1;
926 if (is_multicast_ether_addr(header
.addr1
))
927 tcb_desc
->bMulticast
= 1;
928 if (is_broadcast_ether_addr(header
.addr1
))
929 tcb_desc
->bBroadcast
= 1;
930 rtllib_txrate_selectmode(ieee
, tcb_desc
);
931 if (tcb_desc
->bMulticast
|| tcb_desc
->bBroadcast
)
932 tcb_desc
->data_rate
= ieee
->basic_rate
;
934 tcb_desc
->data_rate
= rtllib_current_rate(ieee
);
937 if (ieee
->pHTInfo
->IOTAction
&
938 HT_IOT_ACT_WA_IOT_Broadcom
) {
939 tcb_desc
->data_rate
=
940 MgntQuery_TxRateExcludeCCKRates(ieee
);
941 tcb_desc
->bTxDisableRateFallBack
= false;
943 tcb_desc
->data_rate
= MGN_1M
;
944 tcb_desc
->bTxDisableRateFallBack
= 1;
948 tcb_desc
->RATRIndex
= 7;
949 tcb_desc
->bTxUseDriverAssingedRate
= 1;
953 rtllib_qurey_ShortPreambleMode(ieee
, tcb_desc
);
954 rtllib_tx_query_agg_cap(ieee
, txb
->fragments
[0],
956 rtllib_query_HTCapShortGI(ieee
, tcb_desc
);
957 rtllib_query_BandwidthMode(ieee
, tcb_desc
);
958 rtllib_query_protectionmode(ieee
, tcb_desc
,
962 spin_unlock_irqrestore(&ieee
->lock
, flags
);
963 dev_kfree_skb_any(skb
);
965 if (ieee
->softmac_features
& IEEE_SOFTMAC_TX_QUEUE
) {
966 dev
->stats
.tx_packets
++;
967 dev
->stats
.tx_bytes
+= le16_to_cpu(txb
->payload_size
);
968 rtllib_softmac_xmit(txb
, ieee
);
970 if ((*ieee
->hard_start_xmit
)(txb
, dev
) == 0) {
972 stats
->tx_bytes
+= le16_to_cpu(txb
->payload_size
);
975 rtllib_txb_free(txb
);
982 spin_unlock_irqrestore(&ieee
->lock
, flags
);
983 netif_stop_queue(dev
);
988 int rtllib_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
990 memset(skb
->cb
, 0, sizeof(skb
->cb
));
991 return rtllib_xmit_inter(skb
, dev
);
993 EXPORT_SYMBOL(rtllib_xmit
);