d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[net80211] start laying down the foundation for 11ac support.

Browse Source 
This is a work in progress and some of this stuff may change;
but hopefully I'm laying down enough stuff and space in fields
to allow it to grow without another major recompile.

We'll see!

* Add a net80211 PHY type for VHT 2G and VHT 5G.

  Note - yes, VHT is supposed to be for 5GHZ, however some vendors
  (*cough* most of them) support some subset of VHT rate support
  in 2GHz.  No - not 80MHz wide channels, but at least some MCS8-9
  support, maybe some beamforming, and maybe some longer A-MPDU
  aggregates.  I don't want to even think about MU-MIMO on 2GHz.

* Add an ifmedia placeholder type for VHT rates.

* Add channel flags for VHT, VHT20/40U/40D/80/80+80/160
* Add channel macros for the above
* Add ieee80211_channel fields for the VHT information and flags,
  along with some padding (so this struct definitely grows.)
* Add a phy type flag for VHT - 'v'

* Bump the number of channels to a much higher amount - until we get
  something like the linux mac80211 chanctx abstraction (where the
  stack provides a current channel configuration via callbacks,
  versus the driver ever checking ic->ic_curchan or similar) we'll
  have to populate VHT+HT combinations.

Eg, there'll likely be a full set of duplicate VHT20/40 channels to match
HT channels.  There will also be a full set of duplicate VHT80 channels -
note that for VHT80, its assumed you're doing VHT40 as a base, so we
don't need a duplicate of VHT80 + 20MHz only primary channels, only
a duplicate of all the VHT40 combinations.

I don't want to think about VHT80+80 or VHT160 for now - and I won't,
as the current device I'm doing 11ac bringup on (QCA9880) only does
VHT80.

I'll likely revisit the channel configuration and scanning related
stuff after I get VHT20/40 up.

* Add vht flags and the basic MCS rate setup to ieee80211com, ieee80211vap
  and ieee80211_node in preparation for 11ac configuration.
  There is zero code that uses this right now.
* Whilst here, add some more placeholders in case I need to extend
  out things by some uint32_t flag sized fields.  Hopefully I won't!

What I haven't yet done:

* any of the code that uses this
* any of the beamforming related fields
* any of the MU-MIMO fields required for STA/AP operation
* any of the IE fields in beacon frame / probe request/response handling
  and the calculations required for shifting beacon contents around
  when the TIM grows/shrinks

This will require a full rebuild of net80211 related programs -
ifconfig, hostapd, wpa_supplicant.
This commit is contained in:
Adrian Chadd 2016-12-16 04:43:31 +00:00
parent fa133b6bf0
commit fdbc9e6e82
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=310147
4 changed files with 75 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
sys/net/if_media.h
View File

@ -264,6 +264,7 @@ uint64_t ifmedia_baudrate(int);
#define IFM_IEEE80211_OFDM27 23 /* OFDM 27Mbps */
/* NB: not enough bits to express MCS fully */
#define IFM_IEEE80211_MCS 24 /* HT MCS rate */
#define IFM_IEEE80211_VHT 25 /* HT MCS rate */
#define IFM_IEEE80211_ADHOC 0x00000100 /* Operate in Adhoc mode */
#define IFM_IEEE80211_HOSTAP 0x00000200 /* Operate in Host AP mode */
@ -280,6 +281,8 @@ uint64_t ifmedia_baudrate(int);
#define IFM_IEEE80211_FH 0x00040000 /* 2Ghz, GFSK mode */
#define IFM_IEEE80211_11NA 0x00050000 /* 5Ghz, HT mode */
#define IFM_IEEE80211_11NG 0x00060000 /* 2Ghz, HT mode */
#define IFM_IEEE80211_VHT5G 0x00070000 /* 5Ghz, VHT mode */
#define IFM_IEEE80211_VHT2G 0x00080000 /* 2Ghz, VHT mode */
/*
* ATM

54
sys/net80211/_ieee80211.h
View File

@ -45,6 +45,7 @@ enum ieee80211_phytype {
IEEE80211_T_HT, /* high throughput */
IEEE80211_T_OFDM_HALF, /* 1/2 rate OFDM */
IEEE80211_T_OFDM_QUARTER, /* 1/4 rate OFDM */
IEEE80211_T_VHT, /* VHT PHY */
};
#define IEEE80211_T_CCK IEEE80211_T_DS /* more common nomenclature */
@ -68,8 +69,10 @@ enum ieee80211_phymode {
IEEE80211_MODE_11NG = 9, /* 2GHz, w/ HT */
IEEE80211_MODE_HALF = 10, /* OFDM, 1/2x clock */
IEEE80211_MODE_QUARTER = 11, /* OFDM, 1/4x clock */
IEEE80211_MODE_VHT_2GHZ = 12, /* 2GHz, VHT */
IEEE80211_MODE_VHT_5GHZ = 13, /* 5GHz, VHT */
};
#define IEEE80211_MODE_MAX (IEEE80211_MODE_QUARTER+1)
#define IEEE80211_MODE_MAX (IEEE80211_MODE_VHT_5GHZ+1)
#define IEEE80211_MODE_BYTES howmany(IEEE80211_MODE_MAX, NBBY)
/*
@ -134,7 +137,7 @@ enum ieee80211_roamingmode {
*/
struct ieee80211_channel {
uint32_t ic_flags; /* see below */
uint16_t ic_freq; /* setting in MHz */
uint16_t ic_freq; /* primary centre frequency in MHz */
uint8_t ic_ieee; /* IEEE channel number */
int8_t ic_maxregpower; /* maximum regulatory tx power in dBm */
int8_t ic_maxpower; /* maximum tx power in .5 dBm */
@ -144,9 +147,17 @@ struct ieee80211_channel {
int8_t ic_maxantgain; /* maximum antenna gain in .5 dBm */
uint8_t ic_pad;
uint16_t ic_devdata; /* opaque device/driver data */
uint8_t ic_vht_ch_freq1; /* VHT primary freq1 IEEE value */
uint8_t ic_vht_ch_freq2; /* VHT secondary 80MHz freq2 IEEE value */
uint16_t ic_freq2; /* VHT secondary 80MHz freq2 MHz */
};
#define IEEE80211_CHAN_MAX 256
/*
* Note: for VHT operation we will need significantly more than
* IEEE80211_CHAN_MAX channels because of the combinations of
* VHT20, VHT40, VHT80, VHT80+80 and VHT160.
*/
#define IEEE80211_CHAN_MAX 1024
#define IEEE80211_CHAN_BYTES howmany(IEEE80211_CHAN_MAX, NBBY)
#define IEEE80211_CHAN_ANY 0xffff /* token for ``any channel'' */
#define IEEE80211_CHAN_ANYC \
@ -177,14 +188,26 @@ struct ieee80211_channel {
#define IEEE80211_CHAN_NOADHOC 0x00200000 /* adhoc mode not allowed */
#define IEEE80211_CHAN_NOHOSTAP 0x00400000 /* hostap mode not allowed */
#define IEEE80211_CHAN_11D 0x00800000 /* 802.11d required */
#define IEEE80211_CHAN_VHT20 0x01000000 /* VHT20 channel */
#define IEEE80211_CHAN_VHT40U 0x02000000 /* VHT40 channel, ext above */
#define IEEE80211_CHAN_VHT40D 0x04000000 /* VHT40 channel, ext below */
#define IEEE80211_CHAN_VHT80 0x08000000 /* VHT80 channel */
#define IEEE80211_CHAN_VHT80_80 0x10000000 /* VHT80+80 channel */
#define IEEE80211_CHAN_VHT160 0x20000000 /* VHT160 channel */
#define IEEE80211_CHAN_HT40 (IEEE80211_CHAN_HT40U | IEEE80211_CHAN_HT40D)
#define IEEE80211_CHAN_HT (IEEE80211_CHAN_HT20 | IEEE80211_CHAN_HT40)
#define IEEE80211_CHAN_VHT40 (IEEE80211_CHAN_VHT40U | IEEE80211_CHAN_VHT40D)
#define IEEE80211_CHAN_VHT (IEEE80211_CHAN_VHT20 | IEEE80211_CHAN_VHT40 \
| IEEE80211_CHAN_VHT80 | IEEE80211_CHAN_VHT80_80 \
| IEEE80211_CHAN_VHT160)
#define IEEE80211_CHAN_BITS \
"\20\1PRIV0\2PRIV2\3PRIV3\4PRIV4\5TURBO\6CCK\7OFDM\0102GHZ\0115GHZ" \
"\12PASSIVE\13DYN\14GFSK\15GSM\16STURBO\17HALF\20QUARTER\21HT20" \
"\22HT40U\23HT40D\24DFS\0254MSXMIT\26NOADHOC\27NOHOSTAP\03011D"
/* XXX TODO: add VHT bits */
/*
* Useful combinations of channel characteristics.
@ -210,7 +233,7 @@ struct ieee80211_channel {
(IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_GFSK | \
IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM | IEEE80211_CHAN_DYN | \
IEEE80211_CHAN_HALF | IEEE80211_CHAN_QUARTER | \
IEEE80211_CHAN_HT)
IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT)
#define IEEE80211_CHAN_ALLTURBO \
(IEEE80211_CHAN_ALL | IEEE80211_CHAN_TURBO | IEEE80211_CHAN_STURBO)
@ -287,6 +310,29 @@ struct ieee80211_channel {
#define IEEE80211_IS_CHAN_11D(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_11D) != 0)
#define IEEE80211_IS_CHAN_VHT(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_VHT) != 0)
#define IEEE80211_IS_CHAN_VHT20(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_VHT20) != 0)
#define IEEE80211_IS_CHAN_VHT40(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_VHT40) != 0)
#define IEEE80211_IS_CHAN_VHT40U(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_VHT40U) != 0)
#define IEEE80211_IS_CHAN_VHT40D(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_VHT40D) != 0)
#define IEEE80211_IS_CHAN_VHTA(_c) \
(IEEE80211_IS_CHAN_5GHZ(_c) && \
((_c)->ic_flags & IEEE80211_CHAN_VHT) != 0)
#define IEEE80211_IS_CHAN_VHTG(_c) \
(IEEE80211_IS_CHAN_2GHZ(_c) && \
((_c)->ic_flags & IEEE80211_CHAN_VHT) != 0)
#define IEEE80211_IS_CHAN_VHT80(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_VHT80) != 0)
#define IEEE80211_IS_CHAN_VHT80_80(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_VHT80_80) != 0)
#define IEEE80211_IS_CHAN_VHT160(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_VHT160) != 0)
#define IEEE80211_CHAN2IEEE(_c) (_c)->ic_ieee
/* dynamic state */

9
sys/net80211/ieee80211_node.h
View File

@ -224,6 +224,15 @@ struct ieee80211_node {
struct ieee80211_tx_ampdu ni_tx_ampdu[WME_NUM_TID];
struct ieee80211_rx_ampdu ni_rx_ampdu[WME_NUM_TID];
/* VHT state */
uint32_t ni_vhtcap;
uint32_t ni_vhtinfo;
struct ieee80211_vht_mcs_info ni_vht_mcsinfo;
uint8_t ni_vht_chan1; /* 20/40/80/160 - VHT chan1 */
uint8_t ni_vht_chan2; /* 80+80 - VHT chan2 */
uint16_t ni_vht_pad1;
uint32_t ni_vht_spare[8];
/* fast-frames state */
struct mbuf * ni_tx_superg[WME_NUM_TID];

13
sys/net80211/ieee80211_var.h
View File

@ -229,6 +229,12 @@ struct ieee80211com {
uint8_t ic_rxstream; /* # RX streams */
uint8_t ic_txstream; /* # TX streams */
/* VHT information */
uint32_t ic_vhtcaps; /* VHT capabilities */
uint32_t ic_vhtextcaps; /* VHT extended capabilities (TODO) */
struct ieee80211_vht_mcs_info iv_vht_mcsinfo; /* Support TX/RX VHT MCS */
uint32_t ic_vht_spare[4];
/* optional state for Atheros SuperG protocol extensions */
struct ieee80211_superg *ic_superg;
@ -390,6 +396,13 @@ struct ieee80211vap {
int iv_inact_run; /* authorized setting */
int iv_inact_probe; /* inactive probe time */
/* VHT flags */
uint32_t iv_flags_vht; /* VHT state flags */
uint32_t iv_vhtcaps; /* VHT capabilities */
uint32_t iv_vhtextcaps; /* VHT extended capabilities (TODO) */
struct ieee80211_vht_mcs_info iv_vht_mcsinfo;
uint32_t iv_vht_spare[4];
int iv_des_nssid; /* # desired ssids */
struct ieee80211_scan_ssid iv_des_ssid[1];/* desired ssid table */
uint8_t iv_des_bssid[IEEE80211_ADDR_LEN];