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2006-10-05IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells1-4/+3
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)
2006-09-24Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6Linus Torvalds1-278/+382
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (217 commits) net/ieee80211: fix more crypto-related build breakage [PATCH] Spidernet: add ethtool -S (show statistics) [NET] GT96100: Delete bitrotting ethernet driver [PATCH] mv643xx_eth: restrict to 32-bit PPC_MULTIPLATFORM [PATCH] Cirrus Logic ep93xx ethernet driver r8169: the MMIO region of the 8167 stands behin BAR#1 e1000, ixgb: Remove pointless wrappers [PATCH] Remove powerpc specific parts of 3c509 driver [PATCH] s2io: Switch to pci_get_device [PATCH] gt96100: move to pci_get_device API [PATCH] ehea: bugfix for register access functions [PATCH] e1000 disable device on PCI error drivers/net/phy/fixed: #if 0 some incomplete code drivers/net: const-ify ethtool_ops declarations [PATCH] ethtool: allow const ethtool_ops [PATCH] sky2: big endian [PATCH] sky2: fiber support [PATCH] sky2: tx pause bug fix drivers/net: Trim trailing whitespace [PATCH] ehea: IBM eHEA Ethernet Device Driver ... Manually resolved conflicts in drivers/net/ixgb/ixgb_main.c and drivers/net/sky2.c related to CHECKSUM_HW/CHECKSUM_PARTIAL changes by commit 84fa7933a33f806bbbaae6775e87459b1ec584c0 that just happened to be next to unrelated changes in this update.
2006-09-22Merge tag 'r8169-20060920-00' of git://electric-eye.fr.zoreil.com/home/romieu/linux-2.6 into tmpJeff Garzik1-1/+1
2006-09-22[NET]: Replace CHECKSUM_HW by CHECKSUM_PARTIAL/CHECKSUM_COMPLETEPatrick McHardy1-1/+1
Replace CHECKSUM_HW by CHECKSUM_PARTIAL (for outgoing packets, whose checksum still needs to be completed) and CHECKSUM_COMPLETE (for incoming packets, device supplied full checksum). Patch originally from Herbert Xu, updated by myself for 2.6.18-rc3. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-20r8169: the MMIO region of the 8167 stands behin BAR#1Francois Romieu1-1/+1
Reported by Matt Bockol <mbockol@carleton.edu> to make its LOM (MSI 965 Neo) work. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-09-13drivers/net: const-ify ethtool_ops declarationsJeff Garzik1-1/+1
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-12Merge tag 'r8169-20060912-00' of git://electric-eye.fr.zoreil.com/home/romieu/linux-2.6 into tmpJeff Garzik1-276/+380
2006-09-11r8169: quirk for the 8110sb on arm platformFrancois Romieu1-2/+7
Inverting the write ordering of the TxDescAddr{High/Low} registers suffices to trigger a sabbat of PCI errors which make the device completely dysfunctional. The issue has not been reported on a different platform. Switching from MMIO accesses to I/O ones as done in Realtek's own driver fixes (papers over ?) the bug as well but I am not thrilled to see everyone pay the I/O price for an obscure bug. This is the minimal change to handle the issue. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Reported-by: Lennert Buytenhek <buytenh@wantstofly.org>
2006-08-31r8169: the 0x8136 needs a 8 bytes alignmentFrancois Romieu1-1/+1
Reported by Darren Salt. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-08-31r8169: add basic MII ioctl supportFrancois Romieu1-0/+28
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-08-31r8169: use standard #defines from mii.h instead of declaring private onesFrancois Romieu1-62/+31
Some unused stuff goes away btw. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-08-31r8169: trim trailing whitespaces and convert whitespaces to tabsFrancois Romieu1-33/+32
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-08-31r8169: udelay() removalFrancois Romieu1-5/+7
No need to chew CPU cycles as there is no heavy timing requirement and the delays are always requested from a sleepable context. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-08-31r8169: use NETDEV_TX_{BUSY/OK}Francois Romieu1-2/+2
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-08-19drivers/net: Remove deprecated use of pci_module_init()Jeff Garzik1-1/+1
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>
2006-07-26r8169: sync with vendor's driverFrancois Romieu1-74/+144
- add several PCI ID for the PCI-E adapters ; - new identification strings ; - the RTL_GIGA_MAC_VER_ defines have been renamed to closely match the out-of-tree driver. It makes the comparison less hairy ; - various magic ; - the PCI region for the device with PCI ID 0x8136 is guessed. Explanation: the in-kernel Linux driver is written to allow MM register accesses and avoid the IO tax. The relevant BAR register was found at base address 1 for the plain-old PCI 8169. User reported lspci show that it is found at base address 2 for the new Gigabit PCI-E 816{8/9}. Typically: 01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.: Unknown device 8168 (rev 01) Subsystem: Unknown device 1631:e015 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0, cache line size 20 Interrupt: pin A routed to IRQ 16 Region 0: I/O ports at b800 [size=256] Region 2: Memory at ff7ff000 (64-bit, non-prefetchable) [size=4K] ^^^^^^^^ So far I have not received any lspci report for the 0x8136 and Realtek's driver do not help: be it under BSD or Linux, their r1000 driver include a USE_IO_SPACE #define but the bar address is always hardcoded to 1 in the MM case. :o/ - the 8168 has been reported to require an extra alignment for its receive buffers. The status of the 8167 and 8136 is not known in this regard. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-07-26r8169: remove rtl8169_init_boardFrancois Romieu1-105/+86
Rationale: - its signature is not exactly pretty; - it has no knowledge of pci_device_id; - kiss 23 lines good bye. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-07-26r8169: hardware flow controlFrancois Romieu1-0/+7
The datasheet suggests that the device handles the hardware flow control almost automagically. User report a different story, so let's try to twiddle the mii registers. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-07-26r8169: RX fifo overflow recoveryFrancois Romieu1-4/+9
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-07-26r8169: mac address change supportFrancois Romieu1-0/+38
Fix for http://bugzilla.kernel.org/show_bug.cgi?id=6032. Cc: Tim Mattox <tmattox@gmail.com> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-07-05[netdrvr] use dev_xxx() printk helpers, rather than dev_printk(KERN_xxx, ...Jeff Garzik1-11/+8
Suggested by Jiri Slaby. Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-07-05[netdrvr] Use dev_printk() when ethernet interface isn't availableJeff Garzik1-24/+19
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>
2006-07-02[PATCH] irq-flags: drivers/net: Use the new IRQF_ constantsThomas Gleixner1-1/+1
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-23[NET]: Merge TSO/UFO fields in sk_buffHerbert Xu1-1/+1
Having separate fields in sk_buff for TSO/UFO (tso_size/ufo_size) is not going to scale if we add any more segmentation methods (e.g., DCCP). So let's merge them. They were used to tell the protocol of a packet. This function has been subsumed by the new gso_type field. This is essentially a set of netdev feature bits (shifted by 16 bits) that are required to process a specific skb. As such it's easy to tell whether a given device can process a GSO skb: you just have to and the gso_type field and the netdev's features field. I've made gso_type a conjunction. The idea is that you have a base type (e.g., SKB_GSO_TCPV4) that can be modified further to support new features. For example, if we add a hardware TSO type that supports ECN, they would declare NETIF_F_TSO | NETIF_F_TSO_ECN. All TSO packets with CWR set would have a gso_type of SKB_GSO_TCPV4 | SKB_GSO_TCPV4_ECN while all other TSO packets would be SKB_GSO_TCPV4. This means that only the CWR packets need to be emulated in software. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-23[NET]: Avoid allocating skb in skb_padHerbert Xu1-2/+1
First of all it is unnecessary to allocate a new skb in skb_pad since the existing one is not shared. More importantly, our hard_start_xmit interface does not allow a new skb to be allocated since that breaks requeueing. This patch uses pskb_expand_head to expand the existing skb and linearize it if needed. Actually, someone should sift through every instance of skb_pad on a non-linear skb as they do not fit the reasons why this was originally created. Incidentally, this fixes a minor bug when the skb is cloned (tcpdump, TCP, etc.). As it is skb_pad will simply write over a cloned skb. Because of the position of the write it is unlikely to cause problems but still it's best if we don't do it. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-05-26[PATCH] r8169: add new PCI IDYoichi Yuasa1-0/+1
Hi, This patch add new PCI ID for r8169 driver. RTL8110SBL has this PCI ID. Please aply. Yoichi Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-03-03Massive net driver const-ification.Arjan van de Ven1-2/+2
2006-02-23r8169: enable wake on lanFrancois Romieu1-0/+87
Similar to 8139cp code but more inspired/lucky. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-02-23r8169: fix broken ring index handling in suspend/resumeFrancois Romieu1-43/+59
rtl8169_hw_start() requires that the descriptor ring indexes be set to zero. Let a deferred invocation of rtl8169_reset_task() handle it. Enabling a few power management bits will not hurt either. suspend/resume is issued with irq on: the spinlock do not need to save the irq flag. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-01-31r8169: fix forced-mode link settingsAndy Gospodarek1-0/+3
Allow the r8169 driver to set devices to be full-duplex only when auto-negotiate is disabled. Signed-off-by: Andy Gospodarek <andy@greyhouse.net> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-01-29r8169: prevent excessive busy-waitingFrancois Romieu1-6/+4
The MII registers read/write function blindly busy waits for an amount of 1000 us (1 ms), then up to 200 ms. These functions are called from irq disabled context. Depending on the clock management, it triggers lost ticks events. Since the value is way above the standard delay required for mii register access, it strangely looks like a bandaid against posted writes. Fixes http://bugzilla.kernel.org/show_bug.cgi?id=5947 Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-01-10[PATCH] turn "const static" into "static const"Jesper Juhl1-1/+1
ICC likes to complain about storage class not being first, GCC doesn't care much (except for cases like "inline static"). have a hard time seeing how it could break anything. Thanks to Gabriel A. Devenyi for pointing out http://linuxicc.sourceforge.net/ which is what made me create this patch. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-16r8169: do not abort when the power management capabilities are disabledFrancois Romieu1-3/+1
The capabilities of the 8169 can be disabled but it is hardly a reason to prevent the use the device. The (so far) unusual behavior has been reported on a MIPS platform by Yoichi Yuasa. Spotted-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2005-11-16r8169: fix printk_ratelimit in the interrupt handlerFrancois Romieu1-1/+1
I keep on getting "printk: N messages suppressed" messages. We need to test netif_msg_intr() _before_ running printk_ratelimit(), because the latter updates state. Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2005-10-03Merge branch 'upstream-fixes'Jeff Garzik1-2/+1
2005-09-30[PATCH] r8169: tone down the r8169 driverFrancois Romieu1-2/+1
Tone down the r8169 driver As an alternative, people can use the boot time 'debug' option and/or use 'ethtool -s ethX msglvl xyz'. The different messages are listed at: http://www.zoreil.com/~romieu/r8169/doc/msglvl.txt Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-22Merge /spare/repo/linux-2.6/Jeff Garzik1-2/+2
2005-09-21[PATCH] r8169: call proper VLAN receive functionTommy Christensen1-2/+2
vlan_hwaccel_rx should be used when in interrupt context. Fixes bug http://bugzilla.kernel.org/show_bug.cgi?id=5284 Signed-off-by: Tommy S. Christensen <tommy.christensen@tpack.net> Cc: Francois Romieu <romieu@fr.zoreil.com> Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2005-09-14[PATCH] r8169: support ETHTOOL_GPERMADDRJohn W. Linville1-0/+2
Add support for ETHTOOL_GPERMADDR to r8169. Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2005-08-27[PATCH] r8169: avoid conflict between revisions 2 and 3 of the Linksys EG1032Francois Romieu1-1/+1
Both revisions share the same PCI device ID and vendor ID but revision 2 of the device uses SysKonnect's chipset whereas revision 3 of the device uses Realtek's 8169 chipset. Credit goes to Christiaan Lutzer <mythtv.lutzer@gmail.com> for reporting the issue and giving the actual value for the different revisions. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2005-08-19[PATCH] r8169: PCI ID for the Linksys EG1032Francois Romieu1-0/+1
The Linksys EG1032 uses Realtek's 8169 chipset. Credit goes to Bob Wilson <bwilson4web@hotmail.com> for the report. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2005-06-28[NET]: Remove gratuitous use of skb->tail in network drivers.David S. Miller1-2/+2
Many drivers use skb->tail unnecessarily. In these situations, the code roughly looks like: dev = dev_alloc_skb(...); [optional] skb_reserve(skb, ...); ... skb->tail ... But even if the skb_reserve() happens, skb->data equals skb->tail. So it doesn't make any sense to use anything other than skb->data in these cases. Another case was the s2io.c driver directly mucking with the skb->data and skb->tail pointers. It really just wanted to do an skb_reserve(), so that's what the code was changed to do instead. Another reason I'm making this change as it allows some SKB cleanups I have planned simpler to merge. In those cleanups, skb->head, skb->tail, and skb->end pointers are removed, and replaced with skb->head_room and skb->tail_room integers. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Jeff Garzik <jgarzik@pobox.com>
2005-06-18Manual merge of rsync://rsync.kernel.org/pub/scm/linux/kernel/git/jgarzik/netdev-2.6.gitLinus Torvalds1-68/+252
This is a fixed-up version of the broken "upstream-2.6.13" branch, where I re-did the manual merge of drivers/net/r8169.c by hand, and made sure the history is all good.
2005-06-13[NET]: Move the netdev list to vger.kernel.org.Ralf Baechle1-1/+1
From: Ralf Baechle <ralf@linux-mips.org> There are archives of the old list at http://oss.sgi.com/archives/netdev Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-05-27[PATCH] r8169: minor cleanupRichard Dawe1-8/+5
- more consistent prototypes; - rtl8169_rx_interrupt() o the error condition should be rare; o goto removal. Signed-off-by: Richard Dawe <rich@phekda.gotadsl.co.uk> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2005-05-27[PATCH] r8169: add ethtool support for dumping the chip statisticsStephen Hemminger1-0/+100
There aren't lots of statistics available, but this is what is available according to the RealTek documentation. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2005-05-27[PATCH] r8169: ethtool message level control supportStephen Hemminger1-56/+135
Also: - ratelimit the too much work at interrupt message, so if under massive packet load the console doesn't get flooded; - removal of a few PFX used in contexts where dev->name is available; - s/->slot_name/pci_name/; - printed_version is redundant with the debug option. Remove it and let the user decide. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2005-05-27[PATCH] r8169: add module parameter (media)Francois Romieu1-0/+1
Add module parameter description for the media option. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2005-05-27[PATCH] r8169: add module parameter (copybreak)Stephen Hemminger1-0/+1
Add module parameter description for copybreak. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2005-05-27[PATCH] r8169: identify the napi versionStephen Hemminger1-2/+7
To tell if driver is configured for NAPI or not, put -NAPI on driver version. Remove the NAPI printk since the complete version information is displayed once in the pci probe routine or returned via ethtool. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
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