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path: root/drivers/net/wireless/b43/dma.c
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* b43: Workaround DMA quirksMichael Buesch2008-04-231-8/+39
| | | | | | | | | | | Some mainboards/CPUs don't allow DMA masks bigger than a certain limit. Some VIA crap^h^h^h^hdevices have an upper limit of 0xFFFFFFFF. So in this case a 64-bit b43 device would always fail to acquire the mask. Implement a workaround to fallback to lower DMA mask, as we can always also support a lower mask. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* Merge branch 'master' of ↵David S. Miller2008-04-171-13/+14
|\ | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
| * ssb: Fix usage of struct device used for DMAingMichael Buesch2008-04-151-13/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes DMA on architectures where DMA is nontrivial, like PPC64. We must use the host-device's (PCI) struct device for any DMA operation instead of the SSB device. For this we add a new struct device pointer to the SSB device structure that will always point to the right device for DMAing. Without this patch b43 and b44 drivers won't work on complex-DMA architectures, that for example need dev->archdata for DMA operations. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | b43: Add PIO support for PCMCIA devicesMichael Buesch2008-04-081-56/+64
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | Merge branch 'master' of ↵David S. Miller2008-04-021-1/+6
|\| | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/s2io.c
| * b43: Add DMA mapping failure messagesMichael Buesch2008-04-011-1/+6
| | | | | | | | | | | | | | | | | | This adds messages for some DMA mapping failures. These are useful for debugging DMA address problems, as they appear on x86_64 machines with IOMMU enabled. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | Merge branch 'master' of ↵David S. Miller2008-03-271-12/+20
|\| | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/usb/rndis_host.c drivers/net/wireless/b43/dma.c net/ipv6/ndisc.c
| * b43: Remove irqs_disabled() sanity checksMichael Buesch2008-03-241-2/+3
| | | | | | | | | | | | | | | | Remove all irqs_disabled() sanity checks, as they are not safe on a RT-enabled kernel and will trigger bogus warnings. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * b43: Fix DMA mapping leakageMichael Buesch2008-03-241-10/+17
| | | | | | | | | | | | | | | | | | This fixes a DMA mapping leakage in the case where we reject a DMA buffer because of its address. Signed-off-by: Michael Buesch <mb@bu3sch.de> Cc: Christian Casteyde <casteyde.christian@free.fr> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | b43: Fix failed frames status report typoMichael Buesch2008-03-071-1/+1
| | | | | | | | | | | | | | This fixes a typo in the status report. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | b43: Add TX statistics debugging countersMichael Buesch2008-03-071-15/+73
| | | | | | | | | | | | | | | | | | 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>
* | b43: Rename the DMA ring pointersMichael Buesch2008-03-071-151/+73
| | | | | | | | | | | | | | | | | | | | | | | | | | Rename the DMA ring pointers to have more descriptive and standard names. Also remove the 6th unused TX ring. We can add it back later, if we need it. The unused TX-status rx-ring is also removed, as that's only used by legacy devices not supported by this driver anyway. This is no functional change, except less memory allocation for the removed rings. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | b43: Add QOS supportMichael Buesch2008-03-071-50/+40
|/ | | | | | | | 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>
* b43: Fix DMA for 30/32-bit DMA enginesMichael Buesch2008-02-051-47/+90
| | | | | | | | 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>
* b43: Drop packets that we are not able to encryptMichael Buesch2008-01-311-4/+26
| | | | | | | | | | | | | | | We must not transmit packets we're not able to encrypt. This fixes a bug where in a tiny timeframe after machine resume packets can get sent unencrypted and might leak information. This also fixes three small resource leakages I spotted while fixing the security problem. Properly deallocate the DMA slots in any DMA allocation error path. 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>
* b43: Add support for new firmwareMichael Buesch2008-01-281-11/+11
| | | | | | | | | | | | | | | | | | | This patch adds support for new firmware. Old firmware is still supported until July 2008. To get new firmware, go to ftp://ftp.linksys.com/opensourcecode/wrt150nv11/1.51.3/ and download the tarball. We don't have a smaller tarball, yet. That will be fixed later. You can extract firmware out of the "wl_ap.o" file contained in this tarball using latest fwcutter. You must pass the option --unsupported to fwcutter. Fwcutter-010 with official support for a new firmware image will be released soon. 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>
* b43: Put multicast frames on the mcast queueMichael Buesch2008-01-281-27/+55
| | | | | | | | | This queues frames flagged as "send after DTIM" by mac80211 on the special multicast queue. The firmware will take care to send the packet after the DTIM. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* b43: Remove PIO supportMichael Buesch2008-01-281-14/+5
| | | | | | | | | | | | | | | 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>
* b43: Changes to enable BCM4311 rev 02 with wireless core revision 13Larry Finger2008-01-281-9/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | The BCM94311MCG rev 02 chip has an 802.11 core with revision 13 and has not been supported until now. The changes include the following: (1) Add the 802.11 rev 13 device to the ssb_device_id table to load b43. (2) Add PHY revision 9 to the supported list. (3) Change the 2-bit routing code for address extensions to 0b10 rather than the 0b01 used for the 32-bit case. (4) Remove some magic numbers in the DMA setup. The DMA implementation for this chip supports full 64-bit addressing with one exception. Whenever the Descriptor Ring Buffer is in high memory, a fatal DMA error occurs. This problem was not present in 2.6.24-rc2 due to code to "Bias the placement of kernel pages at lower PFNs". When commit 44048d70 reverted that code, the DMA error appeared. As a "fix", use the GFP_DMA flag when allocating the buffer for 64-bit DMA. At present, this problem is thought to arise from a hardware error. This patch has been tested on my system and by Cédric Caumont <icare40@hotmail.com>. Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Acked-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* [B43]: add mac80211-based driver for modern BCM43xx devicesMichael Buesch2007-10-101-0/+1494
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>
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