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On a transmit FIFO overflow (err, actually an underflow...) reset
both the transmit & receive sections of the MAC.
Fix comments and debug printfs: Tx FIFOs underflow, they don't
overflow.
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Miscellaneous Realtek RTL8180L driver improvements:
3 Revamp handling of transmit descriptor rings.
4 Reliably IFF_OACTIVE when transmit descriptors are available, to
stop the transmit section of the driver from freezing up.
5 Fix beacon transmission in adhoc and hostap modes. XXX There is
a wart in hostap mode, where beacons are transmitted at 1/2 the
correct rate. Load beacon descriptors when the RTW_INTR_BINT
interrupt arrives; schedule RTW_INTR_BINT 1ms ahead of the target
beacon time.
6 Recover more gracefully from tx/rx errors: avoid
transmitter/receiver/chip resets. Try to re-synchronize software
state with hardware state---e.g., load next descriptor pointer
from hardware.
7 Activate the transmit watchdog timer for beacons as well as other
packets.
8 Introduce rtw_idle() that waits for transmit DMA to finish; call
it before resetting the transmitter.
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partially derived from rtl8180-sa2400 Linux driver.
GCT refuse to release documentation so this is more than
likely not as optimal as it could be.
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ok jsg@
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ok jsg@
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From part of rtw.c rev 1.42:
log message:
Add RTW_TPPOLL_ALL, RTW_TPPOLL_SALL to start and stop, respectively,
all of the transmit rings.
Revamp the transmit section to make better use of all the transmit
rings: beacon queue, high-, low-, and medium-priority rings. Put
beacon frames on the beacon ring. All other management frames,
and data frames, go on the medium-priority ring. Power-save data
frames go on the high-priority ring. (Note that powersaving is
not implemented!) This is a work in progress.
Send all 802.11 Management frames at 1Mbps.
After we put a packet on a transmit ring, tickle the right bit in
the TPPOLL to tell RTL8180. Stop all rings on error and in rtw_stop.
And rtw.c rev 1.33:
log message:
Consolidate variables related to the rx ring in sc_rxdesc_blk,
which is a struct rtw_rxdesc_blk.
Put a copy of the DMA tag and the DMA map into the rx- and tx-ring
blocks so that I don't have to pass them to subroutines all of the
time.
ok dlg@
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sys/dev/ic/rtw.c rev 1.38:
Use clue from rtk(4) and re(4) to fix the rtw(4) packet
filter. Previously, I was using the wrong CRC32 function
to hash multicast addresses; to compensate, I set the
multicast filter to all 1s. Now that I hash the addresses
correctly, I do not any longer set the filter to all 1s.
In rtw_ioctl, avoid gratuitous re-initialization when the
interface flags change. If a !IFF_UP -> IFF_UP transition,
call rtw_init(); otherwise, only reload the packet filter.
sys/dev/ic/rtwreg.h rev 1.10:
Put useful combinations of Receiver Control Register flags
in RTW_RCR_PKTFILT_MASK, RTW_RCR_MONITOR, and
RTW_RCR_PKTFILT_DEFAULT. (XXX RTW_RCR_MONITOR should be
called RTW_RCR_PKTFILT_MONITOR.)
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From rtw.c rev 1.34:
I like the tlp/atw-style names for software descriptors, txsoft,
better than txctl. Change from rtw_txctl/rtw_rxctl to
rtw_txsoft/rtw_rxsoft. Change the descriptor blocks' names to
match: rtw_txctl_blk becomes rtw_txsoft_blk. Change the member-name
prefixes for both software and hardware descriptors.
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Not yet working.
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