summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/b43/dma.h
AgeCommit message (Collapse)AuthorFilesLines
2015-11-18b43: move under broadcom vendor directoryKalle Valo1-305/+0
Part of reorganising wireless drivers directory and Kconfig. Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2013-05-09B43: Handle DMA RX descriptor underrunThommy Jakobsson1-1/+3
Add handling of rx descriptor underflow. This fixes a fault that could happen on slow machines, where data is received faster than the CPU can handle. In such a case the device will use up all rx descriptors and refuse to send any more data before confirming that it is ok. This patch enables necessary interrupt to discover such a situation and will handle them by dropping everything in the ring buffer. Reviewed-by: Michael Buesch <m@bues.ch> Signed-off-by: Thommy Jakobsson <thommyj@gmail.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2013-02-19b43: Increase number of RX DMA slotsLarry Finger1-1/+1
Bastian Bittorf reported that some of the silent freezes on a Linksys WRT54G were due to overflow of the RX DMA ring buffer, which was created with 64 slots. That finding reminded me that I was seeing similar crashed on a netbook, which also has a relatively slow processor. After increasing the number of slots to 128, runs on the netbook that previously failed now worked; however, I found that 109 slots had been used in one test. For that reason, the number of slots is being increased to 256. Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Cc: Bastian Bittorf <bittorf@bluebottle.com> Cc: Stable <stable@vger.kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-08-29b43: use 8K buffers for 64-bit DMA to workaround hardware bugRafał Miłecki1-1/+2
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-08-24b43: fix DMA on some bugged hardwareRafał Miłecki1-0/+6
Some hardware with 64-bit DMA uses lower address word for setting routing (translation) bit. Add workaround for such boards. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-08-22b43: support new RX header, noticed to be used in 598.314+ fwRafał Miłecki1-2/+5
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-22b43: disable parity check on BCMA devicesRafał Miłecki1-0/+4
Analyze of MMIO dumps from BCM43224, BCM43225, BCM4313 and BCM4331 has shown that wl disables parity check for all that cards. This is required for receiving any packets from the hardware. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-04-04b43: allocate receive buffers big enough for max frame len + offsetJohn W. Linville1-1/+1
Otherwise, skb_put inside of dma_rx can fail... https://bugzilla.kernel.org/show_bug.cgi?id=32042 Signed-off-by: John W. Linville <linville@tuxdriver.com> Acked-by: Larry Finger <Larry.Finger@lwfinger.net> Cc: stable@kernel.org
2010-06-03drivers/net: use __packed annotationEric Dumazet1-4/+4
cleanup patch. Use new __packed annotation in drivers/net/ Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-02-09b43: remove get_tx_stats() mac80211 opKalle Valo1-5/+0
get_tx_stats() will be removed from mac80211. Compile-tested only. Cc: Stefano Brivio <stefano.brivio@polimi.it> Cc: Michael Buesch <mb@bu3sch.de> Cc: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: Kalle Valo <kalle.valo@iki.fi> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-12-29Revert "b43: Enforce DMA descriptor memory constraints"John W. Linville1-6/+1
This reverts commit 9bd568a50c446433038dec2a5186c5c57c3dbd23. That commit is shown to cause allocation failures during initialization on some machines. http://bugzilla.kernel.org/show_bug.cgi?id=14844 Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-11-24b43: Rewrite DMA Tx status handling sanity checksMichael Buesch1-1/+5
This rewrites the error handling policies in the TX status handler. It tries to be error-tolerant as in "try hard to not crash the machine". It won't recover from errors (that are bugs in the firmware or driver), because that's impossible. However, it will return a more or less useful error message and bail out. It also tries hard to use rate-limited messages to not flood the syslog in case of a failure. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-11-19b43: Enforce DMA descriptor memory constraintsMichael Buesch1-1/+6
Enforce all device constraints on the descriptor memory region. There are several constraints on the descriptor memory, as documented in the specification. The current code does not enforce them and/or incorrectly enforces them. Those constraints are: - The address limitations on 30/32bit engines, that also apply to the skbs. - The 4k alignment requirement on 30/32bit engines. - The 8k alignment requirement on 64bit engines. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-09-09b43: Remove DMA/PIO queue locksMichael Buesch1-3/+0
This removes the DMA/PIO queue locks. Locking is handled by wl->mutex now. Signed-off-by: Michael Buesch <mb@bu3sch.de> Tested-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-02-27b43: Optimize DMA buffersMichael Buesch1-2/+2
In the old days we used one slot per frame. But when we changed that to 2, we didn't raise the overall slot count. Which resulted in an effective division of two to the number of slots. Double the number of TX slots, so we have an effective hardware queue of 128 frames per QoS queue. Also optimize the TX header cache handling. We don't need a cached TX header for slots that will never carry an actual header. So we reduce the memory consumption of the cache by 50%. So as a net result we end up with more or less the same memory usage before and after this patch (except a few tiny meta structures), but have twice the number of TX slots available. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-02-27b43: Fix DMA buffer size handlingMichael Buesch1-8/+5
This fixes hidden bugs in the size handling of the DMA buffers. This sets the RX buffer size to the theoretical max packet size and fixes passing of the size values to the device (must not subtract the header offset). These bugs are hidden and don't actually trigger due to the magic +100 offset for the buffer size. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-22mac80211: move TX info into skb->cbJohannes Berg1-2/+1
This patch converts mac80211 and all drivers to have transmit information and status in skb->cb rather than allocating extra memory for it and copying all the data around. To make it fit, a union is used where only data that is necessary for all steps is kept outside of the union. A number of fixes were done by Ivo, as well as the rt2x00 part of this patch. Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08b43: Add PIO support for PCMCIA devicesMichael Buesch1-0/+3
This adds PIO support back (D'oh!) for PCMCIA devices. This is a complete rewrite of the old PIO code. It does actually work and we get reasonable performance out of it on a modern machine. On a PowerBook G4 I get a few MBit for TX and a few more for RX. So it doesn't work as well as DMA (of course), but it's a _lot_ faster than the old PIO code (only got a few kBit with that). The limiting factor is the host CPU speed. So it will generate 100% CPU usage when the network interface is heavily loaded. A voluntary preemption point in the RX path makes sure Desktop Latency isn't hurt. PIO is needed for 16bit PCMCIA devices, as we really don't want to poke with the braindead DMA mechanisms on PCMCIA sockets. Additionally, not all PCMCIA sockets do actually support DMA in 16bit mode (mine doesn't). Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-03-08b43: Add TX statistics debugging countersMichael Buesch1-1/+7
This adds a few debugging counters, that are useful for debugging the "card does not transmit" or "connection is unstable" kind of problems. It's also useful for tuning an RC algorithm. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-03-08b43: Add QOS supportMichael Buesch1-0/+3
This adds QOS support to the b43 driver. QOS can be disabled on driver level with a module parameter for debugging purposes. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-02-05b43: Fix DMA for 30/32-bit DMA enginesMichael Buesch1-11/+9
This checks if the DMA address is bigger than what the controller can manage. It will reallocate the buffers in the GFP_DMA zone in that case. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-01-29b43: Remove PIO supportMichael Buesch1-50/+0
Remove b43 PIO support. DMA works well on all supported devices. There's no reason to use PIO. Additionally, new devices don't support PIO in hardware anymore. b43 PIO support is dead and unused code. After applying this patch please do git rm drivers/net/wireless/b43/pio.h git rm drivers/net/wireless/b43/pio.c to remove the main PIO support code. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2007-10-11[B43]: add mac80211-based driver for modern BCM43xx devicesMichael Buesch1-0/+337
Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-08 11:40:11 +0300