1 /*
2 * Copyright (c) 2010 Broadcom Corporation
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #ifndef _BRCM_SCB_H_
18 #define _BRCM_SCB_H_
19
20 #include <linux/if_ether.h>
21 #include <brcmu_utils.h>
22 #include <defs.h>
23 #include "types.h"
24
25 #define AMPDU_TX_BA_MAX_WSIZE 64 /* max Tx ba window size (in pdu) */
26
27 #define AMPDU_MAX_SCB_TID NUMPRIO
28
29 /* scb flags */
30 #define SCB_WMECAP 0x0040
31 #define SCB_HTCAP 0x10000 /* HT (MIMO) capable device */
32 #define SCB_IS40 0x80000 /* 40MHz capable */
33 #define SCB_STBCCAP 0x40000000 /* STBC Capable */
34
35 #define SCB_MAGIC 0xbeefcafe
36
37 /* structure to store per-tid state for the ampdu initiator */
38 struct scb_ampdu_tid_ini {
39 u8 tid; /* initiator tid for easy lookup */
40 /* tx retry count; indexed by seq modulo */
41 u8 txretry[AMPDU_TX_BA_MAX_WSIZE];
42 struct scb *scb; /* backptr for easy lookup */
43 u8 ba_wsize; /* negotiated ba window size (in pdu) */
44 };
45
46 struct scb_ampdu {
47 struct scb *scb; /* back pointer for easy reference */
48 u8 mpdu_density; /* mpdu density */
49 u8 max_pdu; /* max pdus allowed in ampdu */
50 u8 release; /* # of mpdus released at a time */
51 u16 min_len; /* min mpdu len to support the density */
52 u32 max_rx_ampdu_bytes; /* max ampdu rcv length; 8k, 16k, 32k, 64k */
53
54 /*
55 * This could easily be a ini[] pointer and we keep this info in wl
56 * itself instead of having mac80211 hold it for us. Also could be made
57 * dynamic per tid instead of static.
58 */
59 /* initiator info - per tid (NUMPRIO): */
60 struct scb_ampdu_tid_ini ini[AMPDU_MAX_SCB_TID];
61 };
62
63 /* station control block - one per remote MAC address */
64 struct scb {
65 u32 magic;
66 u32 flags; /* various bit flags as defined below */
67 u32 flags2; /* various bit flags2 as defined below */
68 u8 state; /* current state bitfield of auth/assoc process */
69 u8 ea[ETH_ALEN]; /* station address */
70 uint fragresid[NUMPRIO];/* #bytes unused in frag buffer per prio */
71
72 u16 seqctl[NUMPRIO]; /* seqctl of last received frame (for dups) */
73 /* seqctl of last received frame (for dups) for non-QoS data and
74 * management */
75 u16 seqctl_nonqos;
76 u16 seqnum[NUMPRIO];/* WME: driver maintained sw seqnum per priority */
77
78 struct scb_ampdu scb_ampdu; /* AMPDU state including per tid info */
79 };
80
81 #endif /* _BRCM_SCB_H_ */