android_kernel_motorola_sm6225/drivers/net/wireless/rt2x00/rt2x00ring.h
Johannes Berg 4150c57212 [PATCH] mac80211: revamp interface and filter configuration
Drivers are currently supposed to keep track of monitor
interfaces if they allow so-called "hard" monitor, and
they are also supposed to keep track of multicast etc.

This patch changes that, replaces the set_multicast_list()
callback with a new configure_filter() callback that takes
filter flags (FIF_*) instead of interface flags (IFF_*).
For a driver, this means it should open the filter as much
as necessary to get all frames requested by the filter flags.
Accordingly, the filter flags are named "positively", e.g.
FIF_ALLMULTI.

Multicast filtering is a bit special in that drivers that
have no multicast address filters need to allow multicast
frames through when either the FIF_ALLMULTI flag is set or
when the mc_count value is positive.

At the same time, drivers are no longer notified about
monitor interfaces at all, this means they now need to
implement the start() and stop() callbacks and the new
change_filter_flags() callback. Also, the start()/stop()
ordering changed, start() is now called *before* any
add_interface() as it really should be, and stop() after
any remove_interface().

The patch also changes the behaviour of setting the bssid
to multicast for scanning when IEEE80211_HW_NO_PROBE_FILTERING
is set; the IEEE80211_HW_NO_PROBE_FILTERING flag is removed
and the filter flag FIF_BCN_PRBRESP_PROMISC introduced.
This is a lot more efficient for hardware like b43 that
supports it and other hardware can still set the BSSID
to all-ones.

Driver modifications by Johannes Berg (b43 & iwlwifi), Michael Wu
(rtl8187, adm8211, and p54), Larry Finger (b43legacy), and
Ivo van Doorn (rt2x00).

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Michael Wu <flamingice@sourmilk.net>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2007-10-10 16:52:57 -07:00

268 lines
5.5 KiB
C

/*
Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
<http://rt2x00.serialmonkey.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the
Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
Module: rt2x00
Abstract: rt2x00 ring datastructures and routines
*/
#ifndef RT2X00RING_H
#define RT2X00RING_H
/*
* data_desc
* Each data entry also contains a descriptor which is used by the
* device to determine what should be done with the packet and
* what the current status is.
* This structure is greatly simplified, but the descriptors
* are basically a list of little endian 32 bit values.
* Make the array by default 1 word big, this will allow us
* to use sizeof() correctly.
*/
struct data_desc {
__le32 word[1];
};
/*
* rxdata_entry_desc
* Summary of information that has been read from the
* RX frame descriptor.
*/
struct rxdata_entry_desc {
int signal;
int rssi;
int ofdm;
int size;
int flags;
};
/*
* txdata_entry_desc
* Summary of information that should be written into the
* descriptor for sending a TX frame.
*/
struct txdata_entry_desc {
unsigned long flags;
#define ENTRY_TXDONE 1
#define ENTRY_TXD_RTS_FRAME 2
#define ENTRY_TXD_OFDM_RATE 3
#define ENTRY_TXD_MORE_FRAG 4
#define ENTRY_TXD_REQ_TIMESTAMP 5
#define ENTRY_TXD_BURST 6
/*
* Queue ID. ID's 0-4 are data TX rings
*/
int queue;
#define QUEUE_MGMT 13
#define QUEUE_RX 14
#define QUEUE_OTHER 15
/*
* PLCP values.
*/
u16 length_high;
u16 length_low;
u16 signal;
u16 service;
/*
* Timing information
*/
int aifs;
int ifs;
int cw_min;
int cw_max;
};
/*
* data_entry
* The data ring is a list of data entries.
* Each entry holds a reference to the descriptor
* and the data buffer. For TX rings the reference to the
* sk_buff of the packet being transmitted is also stored here.
*/
struct data_entry {
/*
* Status flags
*/
unsigned long flags;
#define ENTRY_OWNER_NIC 1
/*
* Ring we belong to.
*/
struct data_ring *ring;
/*
* sk_buff for the packet which is being transmitted
* in this entry (Only used with TX related rings).
*/
struct sk_buff *skb;
/*
* Store a ieee80211_tx_status structure in each
* ring entry, this will optimize the txdone
* handler.
*/
struct ieee80211_tx_status tx_status;
/*
* private pointer specific to driver.
*/
void *priv;
/*
* Data address for this entry.
*/
void *data_addr;
dma_addr_t data_dma;
};
/*
* data_ring
* Data rings are used by the device to send and receive packets.
* The data_addr is the base address of the data memory.
* To determine at which point in the ring we are,
* have to use the rt2x00_ring_index_*() functions.
*/
struct data_ring {
/*
* Pointer to main rt2x00dev structure where this
* ring belongs to.
*/
struct rt2x00_dev *rt2x00dev;
/*
* Base address for the device specific data entries.
*/
struct data_entry *entry;
/*
* TX queue statistic info.
*/
struct ieee80211_tx_queue_stats_data stats;
/*
* TX Queue parameters.
*/
struct ieee80211_tx_queue_params tx_params;
/*
* Base address for data ring.
*/
dma_addr_t data_dma;
void *data_addr;
/*
* Index variables.
*/
u16 index;
u16 index_done;
/*
* Size of packet and descriptor in bytes.
*/
u16 data_size;
u16 desc_size;
};
/*
* Handlers to determine the address of the current device specific
* data entry, where either index or index_done points to.
*/
static inline struct data_entry *rt2x00_get_data_entry(struct data_ring *ring)
{
return &ring->entry[ring->index];
}
static inline struct data_entry *rt2x00_get_data_entry_done(struct data_ring
*ring)
{
return &ring->entry[ring->index_done];
}
/*
* Total ring memory
*/
static inline int rt2x00_get_ring_size(struct data_ring *ring)
{
return ring->stats.limit * (ring->desc_size + ring->data_size);
}
/*
* Ring index manipulation functions.
*/
static inline void rt2x00_ring_index_inc(struct data_ring *ring)
{
ring->index++;
if (ring->index >= ring->stats.limit)
ring->index = 0;
ring->stats.len++;
}
static inline void rt2x00_ring_index_done_inc(struct data_ring *ring)
{
ring->index_done++;
if (ring->index_done >= ring->stats.limit)
ring->index_done = 0;
ring->stats.len--;
ring->stats.count++;
}
static inline void rt2x00_ring_index_clear(struct data_ring *ring)
{
ring->index = 0;
ring->index_done = 0;
ring->stats.len = 0;
ring->stats.count = 0;
}
static inline int rt2x00_ring_empty(struct data_ring *ring)
{
return ring->stats.len == 0;
}
static inline int rt2x00_ring_full(struct data_ring *ring)
{
return ring->stats.len == ring->stats.limit;
}
static inline int rt2x00_ring_free(struct data_ring *ring)
{
return ring->stats.limit - ring->stats.len;
}
/*
* TX/RX Descriptor access functions.
*/
static inline void rt2x00_desc_read(struct data_desc *desc,
const u8 word, u32 *value)
{
*value = le32_to_cpu(desc->word[word]);
}
static inline void rt2x00_desc_write(struct data_desc *desc,
const u8 word, const u32 value)
{
desc->word[word] = cpu_to_le32(value);
}
#endif /* RT2X00RING_H */