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path: root/drivers/net/b44.c
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* dma-mapping: replace all DMA_30BIT_MASK macro with DMA_BIT_MASK(30)Yang Hongyang2009-04-07
| | | | | | | | Replace all DMA_30BIT_MASK macro with DMA_BIT_MASK(30) Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* b44: Use kernel DMA addresses for the kernel DMA APIMichael Buesch2009-04-06
| | | | | | | | | | | We must not use the device DMA addresses for the kernel DMA API, because device DMA addresses have an additional offset added for the SSB translation. Use the original dma_addr_t for the sync operation. Cc: stable@kernel.org Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* b44: Fix sizes passed to b44_sync_dma_desc_for_{device,cpu}()Michael Buesch2009-04-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | > > ------------[ cut here ]------------ > > WARNING: at lib/dma-debug.c:539 check_sync+0xe9/0x341() (Not tainted) > > Hardware name: HP Compaq nx6110 (PY501EA#AB9) > > b44 0000:02:0e.0: DMA-API: device driver tries to sync DMA memory it has not > > allocated [device address=0x0000000075941040] [size=1566 bytes] > > Modules linked in: llc bnep l2cap bluetooth autofs4 lm90 hwmon i2c_i801 sunrpc > > ipv6 cpufreq_ondemand acpi_cpufreq uinput snd_intel8x0m snd_intel8x0 > > snd_ac97_codec snd_seq_dummy ac97_bus snd_seq_oss snd_seq_midi_event snd_seq > > snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm b44 ssb firewire_ohci > > snd_timer ipw2200 iTCO_wdt mii firewire_core snd iTCO_vendor_support libipw > > yenta_socket crc_itu_t lib80211 rsrc_nonstatic soundcore snd_page_alloc joydev > > pcspkr wmi serio_raw ata_generic pata_acpi i915 drm i2c_algo_bit i2c_core video > > output [last unloaded: scsi_wait_scan] > > Pid: 2418, comm: S58ntpd Not tainted 2.6.29-16.fc10.i686.PAE #1 > > Call Trace: > > [<c04396d1>] warn_slowpath+0x7c/0xbd > > [<c0457fe1>] ? register_lock_class+0x17/0x290 > > [<c0458d61>] ? mark_lock+0x1e/0x349 > > [<c0556448>] ? _raw_spin_unlock+0x74/0x78 > > [<c0458d61>] ? mark_lock+0x1e/0x349 > > [<c055a060>] ? check_sync+0x37/0x341 > > [<c055a112>] check_sync+0xe9/0x341 > > [<c0711245>] ? _spin_unlock_irqrestore+0x45/0x55 > > [<c04592db>] ? trace_hardirqs_on+0xb/0xd > > [<c055a4d1>] debug_dma_sync_single_for_device+0x2f/0x39 > > [<f828f722>] dma_sync_single_for_device+0x4a/0x59 [b44] > > [<f828f76f>] ssb_dma_sync_single_for_device+0x3e/0x48 [b44] > > [<f8291d1e>] b44_recycle_rx+0x18c/0x196 [b44] > > [<f8291f9f>] b44_poll+0x277/0x3c0 [b44] > > [<c0687bb9>] net_rx_action+0xa1/0x1ca > > [<c043e30a>] __do_softirq+0x9d/0x154 > > [<c043e413>] do_softirq+0x52/0x7e > > [<c043e56f>] irq_exit+0x49/0x77 > > [<c040b22e>] do_IRQ+0x97/0xad > > [<c0409dac>] common_interrupt+0x2c/0x34 I don't know if this is related, but the following patch seems to fix some DMA mapping bug. Can somebody comment who does understand the code better than me? (completely untested) Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of ↵David S. Miller2009-03-02
|\ | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/wireless/iwlwifi/iwl-tx.c net/8021q/vlan_core.c net/core/dev.c
| * b44: Disable device on shutdownMichael Buesch2009-02-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Disable the SSB core on device shutdown. This has two advantages: 1) A clean device shutdown is always desired here, because we disable the device's global crystal in the next statement. 2) This fixes a bug where the device will come up with the enable-bit set on the next initialization (without a reboot inbetween). This causes breakage on the second initialization due to code that checks this bit (ssb_device_is_enabled() checks). Reported-by: Pantelis Koukousoulas <pktoss@gmail.com> Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: David S. Miller <davem@davemloft.net>
| * b44: Unconditionally enable interrupt routing on resetMichael Buesch2009-02-27
| | | | | | | | | | | | | | | | | | | | | | | | | | Unconditionally setup the IRQ routing on chip reset. It's safe to call ssb_pcicore_dev_irqvecs_enable() unconditionally, because it has internal checks for redundant calls. This fixes problems where hardware will not come up properly due to quirks in the enable-bit hardware. Reported-by: Pantelis Koukousoulas <pktoss@gmail.com> Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* | netdev: Use __netdev_alloc_skb() instead of __dev_alloc_skb().David S. Miller2009-02-10
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: Remove redundant NAPI functionsBen Hutchings2009-01-21
|/ | | | | | | | | | | Following the removal of the unused struct net_device * parameter from the NAPI functions named *netif_rx_* in commit 908a7a1, they are exactly equivalent to the corresponding *napi_* functions and are therefore redundant. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* b44: GFP_DMA skb should not escape from driverEric Dumazet2009-01-15
| | | | | | | | | | | | | | | | | | | | b44 chip has some hardware limitations, that need GFP_DMA bounce buffers in some situations. In order to not deplete DMA zone, we should keep allocated GFP_DMA skb only for driver use. At rx time, we copy such skb to newly allocated skb, reusing existing copybreak infrastructure. On machines with low amount of memory, all skb meet the hardware limitation, so no copy is needed. We detect this situation using a new device flag, set to one if one GFP_DMA skb was ever allocated by b44_alloc_rx_skb(). Previously allocated skb, even outside from DMA zone will then be recycled, to have minimal impact on DMA zone use. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Tested-by: Ionut Leonte <ionut.leonte@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* b44: fix misalignment and wasted space in rx handlingFelix Fietkau2009-01-11
| | | | | | | | | | | | | | | Broadcom 4400 puts a header of configurable size (apparently needs to be at least 28 bytes) in front of received packets. When handling this, the previous code accidentally added the offset 30 *twice* for the software and once for the hardware, thereby cancelling out the IP alignment effect of the 30 byte padding and wasting an additional 30 bytes of memory per packet. This patch fixes this problem and improves routing throughput by about 30% on MIPS, where unaligned access is expensive. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* b44: convert to net_device_opsStephen Hemminger2009-01-07
| | | | | Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: Fix warning fallout from recent NAPI interface changes.David S. Miller2008-12-26
| | | | | | | | | | | When we removed the network device argument from several NAPI interfaces in 908a7a16b852ffd618a9127be8d62432182d81b4 ("net: Remove unused netdev arg from some NAPI interfaces.") several drivers now started getting unused variable warnings. This fixes those up. Signed-off-by: David S. Miller <davem@davemloft.net>
* net: Remove unused netdev arg from some NAPI interfaces.Neil Horman2008-12-22
| | | | | | | | | | When the napi api was changed to separate its 1:1 binding to the net_device struct, the netif_rx_[prep|schedule|complete] api failed to remove the now vestigual net_device structure parameter. This patch cleans up that api by properly removing it.. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* drivers/net: Kill now superfluous ->last_rx stores.David S. Miller2008-11-04
| | | | | | | | | | | | | The generic packet receive code takes care of setting netdev->last_rx when necessary, for the sake of the bonding ARP monitor. Drivers need not do it any more. Some cases had to be skipped over because the drivers were making use of the ->last_rx value themselves. Signed-off-by: David S. Miller <davem@davemloft.net>
* net: convert print_mac to %pMJohannes Berg2008-10-27
| | | | | | | | | | | | This converts pretty much everything to print_mac. There were a few things that had conflicts which I have just dropped for now, no harm done. I've built an allyesconfig with this and looked at the files that weren't built very carefully, but it's a huge patch. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* ssb, b43, b43legacy, b44: Rewrite SSB DMA APIMichael Buesch2008-06-27
| | | | | | | | | | | This is a rewrite of the DMA API for SSB devices. This is needed, because the old (non-existing) "API" made too many bad assumptions on the API of the host-bus (PCI). This introduces an almost complete SSB-DMA-API that maps to the lowlevel bus-API based on the bustype. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* ssb: Fix usage of struct device used for DMAingMichael Buesch2008-04-15
| | | | | | | | | | | | | | 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>
* b44: Truncate PHY addressMichael Buesch2008-03-25
| | | | | | | | | | | | Some ROMs on embedded devices store incorrect values for the PHY address of the ethernet device. It looks like the number is sign-extended. Truncate the value by applying the PHY-address mask to it. The patch was tested on a bcm47xx embedded system (where the bug triggers) and a bcm4400 PCI card. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* b44: power down PHY when interface downMiguel Botón2008-01-28
| | | | | | | | This is just this patch (http://lkml.org/lkml/2007/7/1/51) but adapted to the 'b44' ssb driver. Signed-off-by: Miguel Botón <mboton@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* b44: Convert to use of the new SPROM structureLarry Finger2008-01-28
| | | | | | | The b44 driver is changed to use the new SPROM data structure. Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* [netdrvr] Stop using legacy hooks ->self_test_count, ->get_stats_countJeff Garzik2007-10-10
| | | | | | | These have been superceded by the new ->get_sset_count() hook. Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [B44]: port to native ssb supportMichael Buesch2007-10-10
| | | | | Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* [NET]: Introduce and use print_mac() and DECLARE_MAC_BUF()Joe Perches2007-10-10
| | | | | | | This is nicer than the MAC_FMT stuff. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Nuke SET_MODULE_OWNER macro.Ralf Baechle2007-10-10
| | | | | | | | | | | | It's been a useless no-op for long enough in 2.6 so I figured it's time to remove it. The number of people that could object because they're maintaining unified 2.4 and 2.6 drivers is probably rather small. [ Handled drivers added by netdev tree and some missed IRDA cases... -DaveM ] Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Make NAPI polling independent of struct net_device objects.Stephen Hemminger2007-10-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Several devices have multiple independant RX queues per net device, and some have a single interrupt doorbell for several queues. In either case, it's easier to support layouts like that if the structure representing the poll is independant from the net device itself. The signature of the ->poll() call back goes from: int foo_poll(struct net_device *dev, int *budget) to int foo_poll(struct napi_struct *napi, int budget) The caller is returned the number of RX packets processed (or the number of "NAPI credits" consumed if you want to get abstract). The callee no longer messes around bumping dev->quota, *budget, etc. because that is all handled in the caller upon return. The napi_struct is to be embedded in the device driver private data structures. Furthermore, it is the driver's responsibility to disable all NAPI instances in it's ->stop() device close handler. Since the napi_struct is privatized into the driver's private data structures, only the driver knows how to get at all of the napi_struct instances it may have per-device. With lots of help and suggestions from Rusty Russell, Roland Dreier, Michael Chan, Jeff Garzik, and Jamal Hadi Salim. Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra, Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan. [ Ported to current tree and all drivers converted. Integrated Stephen's follow-on kerneldoc additions, and restored poll_list handling to the old style to fix mutual exclusion issues. -DaveM ] Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: ethtool_perm_addr only has one implementationMatthew Wilcox2007-07-31
| | | | | | | | | All drivers implement ethtool get_perm_addr the same way -- by calling the generic function. So we can inline the generic function into the caller and avoid going through the drivers. Signed-off-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: David S. Miller <davem@davemloft.net>
* some kmalloc/memset ->kzalloc (tree wide)Yoann Padioleau2007-07-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Transform some calls to kmalloc/memset to a single kzalloc (or kcalloc). Here is a short excerpt of the semantic patch performing this transformation: @@ type T2; expression x; identifier f,fld; expression E; expression E1,E2; expression e1,e2,e3,y; statement S; @@ x = - kmalloc + kzalloc (E1,E2) ... when != \(x->fld=E;\|y=f(...,x,...);\|f(...,x,...);\|x=E;\|while(...) S\|for(e1;e2;e3) S\) - memset((T2)x,0,E1); @@ expression E1,E2,E3; @@ - kzalloc(E1 * E2,E3) + kcalloc(E1,E2,E3) [akpm@linux-foundation.org: get kcalloc args the right way around] Signed-off-by: Yoann Padioleau <padator@wanadoo.fr> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Acked-by: Russell King <rmk@arm.linux.org.uk> Cc: Bryan Wu <bryan.wu@analog.com> Acked-by: Jiri Slaby <jirislaby@gmail.com> Cc: Dave Airlie <airlied@linux.ie> Acked-by: Roland Dreier <rolandd@cisco.com> Cc: Jiri Kosina <jkosina@suse.cz> Acked-by: Dmitry Torokhov <dtor@mail.ru> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org> Acked-by: Pierre Ossman <drzeus-list@drzeus.cx> Cc: Jeff Garzik <jeff@garzik.org> Cc: "David S. Miller" <davem@davemloft.net> Acked-by: Greg KH <greg@kroah.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* b44: use netdev_alloc_skbStephen Hemminger2007-07-08
| | | | | | | | Use netdev_alloc_skb rather than dev_alloc_skb when allocating receive buffers. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* b44: packet offset is constantStephen Hemminger2007-07-08
| | | | | | | The receive buffer offset is constant in this driver. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* b44: tx bounce sizing.Stephen Hemminger2007-07-08
| | | | | | | | No need to grap full size MTU buffer for possibly small transmit bounce buffers. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* b44: timer power savingStephen Hemminger2007-07-08
| | | | | | | | | | | Make the PHY and statistic timer run on one second boundary for powersaving. On resume, the driver should check for link up immediately, to get online faster (rather than waiting for the next second). Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [SK_BUFF]: Introduce skb_copy_from_linear_data{_offset}Arnaldo Carvalho de Melo2007-04-26
| | | | | | | To clearly state the intent of copying from linear sk_buffs, _offset being a overly long variant but interesting for the sake of saving some bytes. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* [ETH]: Make eth_type_trans set skb->dev like the other *_type_transArnaldo Carvalho de Melo2007-04-26
| | | | | | | One less thing for drivers writers to worry about. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* b44: fix IFF_ALLMULTI handling of CAM slotsBill Helfinstine2007-04-03
| | | | | | | | | | | | | | | | If you set the IFF_ALLMULTI flag on a b44 device, or if you join more than B44_MCAST_TABLE_SIZE multicast groups, the device will stop receiving unicast messages. This is because the __b44_set_mac_addr call sets the zeroth CAM entry to the MAC address of the device, and then the loop at line 1722 proceeds to overwrite it unless the value of i is set by the __b44_load_mcast call. However, when IFF_ALLMULTI is set, that call is bypassed, leaving i set to zero. Fixed by starting the loop at 1 to make it skip the CAM entry for the MAC address. Signed-off-by: Bill Helfinstine <bhelf@flitterfly.whirpon.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* B44: increase wait loopGary Zambrano2007-02-17
| | | | | | | | | | | | The b44 Enet control disable bit may take longer to clear on some systems, so the loop count is increased with this patch. Functionality is not compromised, but a debug message can be seen when the bit is not cleared within the count value. Thanks to Vasileios Lourdas who reported the problem. Signed-off by: Gary Zambrano <zambrano@broadcom.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* b44: replace defineGary Zambrano2007-02-17
| | | | | | | | Replaced B44_DMA_MASK with DMA_30BIT_MASK. Signed-off by: Gary Zambrano <zambrano@broadcom.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* b44 endian annotationsAl Viro2007-02-06
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Broadcom 4400 resume small fixDmitriy Monakhov2007-01-30
| | | | | | | | | | | | Some issues in b44_resume(). - Return value of pci_enable_device() was ignored. - If request_irq() has failed we have to just disable device and exit. Signed-off-by: Dmitriy Monakhov <dmonakhov@openvz.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* b44: src_desc->addr is little-endianAl Viro2007-01-30
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* b44: Fix frequent link changesMichael Chan2007-01-30
| | | | | | | | | | | | | | | | | | | | | This fixes the issue of frequent link changes under heavy traffic reported below: http://bugzilla.kernel.org/show_bug.cgi?id=7696 https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=216338 The b44 chip occasionally needs to be reset when ISTAT_ERRORS are encountered. The reset sequence includes a PHY reset that will take many seconds to complete and cause the link to go down and up. By skipping the PHY reset, it will greatly reduce the interruption when ISTAT_ERRORS are encountered. Change the full_reset parameter to reset_kind parameter in b44_init_hw(). This will allow PHY reset to be skipped when ISTAT_ERRORS are encountered. Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* netpoll: drivers must not enable IRQ unconditionally in their NAPI handlerFrancois Romieu2006-12-26
| | | | | | | | | | | | | net/core/netpoll.c::netpoll_send_skb() calls the poll handler when it is available. As netconsole can be used from almost any context, IRQ must not be enabled blindly in the NAPI handler of a driver which supports netpoll. b57bd06655a028aba7b92e1c19c2093e7fcfb341 fixed the issue for the 8139too.c driver. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] b44: change comment about irq mask registerJohannes Berg2006-11-07
| | | | | | | | | | | | | Through some experimentation with the similarly built bcm43xx I came to the conclusion that if the hw/firmware sets a bit in the interrupt register, an interrupt will only be raised if that bit is included in the interrupt mask. Hence, the interrupt mask is more like an interrupt control mask. This patch changes the comment to reflect that. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] b44: fix eeprom endianess issueMichael Buesch2006-10-11
| | | | | | | | | | | | | | | | | | | | | | | This fixes eeprom read on big-endian architectures. readw returns the data in CPU order. With cpu_to_le16 we convert it to little endian, because "ptr" is a pointer to a _byte_ arrray. See the cast above. A byte array is little endian. The bug is: Reading u16 values with readw, casting them into an u8 array and accessing this u8 array as an u8 (byte) array. The correct fix is to swap the CPU-ordering value returned by readw into little endian, as the u8 array is little endian. This compiles to nothing on little endian hardware (so it does not change b44 code on LE hardware), but _fixes_ code on BE hardware. Signed-off-by: Michael Buesch <mb@bu3sch.de> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Merge branch 'master' into upstream-fixesJeff Garzik2006-10-11
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| * IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells2006-10-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
* | [netdrvr] b44: handle excessive multicast groupsJeff Garzik2006-10-05
|/ | | | | | | | | | | | | If there are more than B44_MCAST_TABLE_SIZE groups in the dev->mc_list, it will only listen to the first B44_MCAST_TABLE_SIZE that it sees. This change makes the driver go into RXCONFIG_ALLMULTI mode if there are more than B44_MCAST_TABLE_SIZE groups being subscribed to, similar to other network drivers. Noticed by Bill Helfinstine <bhelf@flitterfly.whirpon.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* drivers/net: const-ify ethtool_ops declarationsJeff Garzik2006-09-13
| | | | Signed-off-by: Jeff Garzik <jeff@garzik.org>
* drivers/net: Remove deprecated use of pci_module_init()Jeff Garzik2006-08-19
| | | | | | | From: Michal Piotrowski <michal.k.k.piotrowski@gmail.com> Signed-off-by: Michal Piotrowski <michal.k.k.piotrowski@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [netdrvr] use dev_xxx() printk helpers, rather than dev_printk(KERN_xxx, ...Jeff Garzik2006-07-05
| | | | | | Suggested by Jiri Slaby. Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [netdrvr] Use dev_printk() when ethernet interface isn't availableJeff Garzik2006-07-05
| | | | | | | | | | For messages prior to register_netdev(), prefer dev_printk() because that prints out both our driver name and our [PCI | whatever] bus id. Updates: 8139{cp,too}, b44, bnx2, cassini, {eepro,epic}100, fealnx, hamachi, ne2k-pci, ns83820, pci-skeleton, r8169. Signed-off-by: Jeff Garzik <jeff@garzik.org>
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