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path: root/drivers/net/gianfar.c
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* remove bogus CONFIG_GFAR_NAPI'sAdrian Bunk2008-08-07
| | | | | | | | | | The commit that made the CONFIG_GFAR_NAPI code unconditional was included at the same time as a new CONFIG_GFAR_NAPI user, resulting in these bugus #ifdef's. Reported-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* Merge commit 'origin/master'Benjamin Herrenschmidt2008-07-22
|\ | | | | | | | | Manually fixed up: drivers/net/fs_enet/fs_enet-main.c
| * gianfar: do not touch net queue in adjust_link phylib callbackAnton Vorontsov2008-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the net queue has not been started, we'll get this nice oops and non-working ethernet: PHY: 0:01 - Link is Up - 1000/Full ------------[ cut here ]------------ kernel BUG at net/core/dev.c:1328! Oops: Exception in kernel mode, sig: 5 [#1] MPC837x RDB Modules linked in: NIP: c02544a0 LR: c01a17d0 CTR: c01a16ac REGS: cf837e40 TRAP: 0700 Not tainted (2.6.26-05253-g14b395e) MSR: 00021032 <ME,IR,DR> CR: 22042044 XER: 00000000 TASK = cf819400[5] 'events/0' THREAD: cf836000 GPR00: c01a17d0 cf837ef0 cf819400 c03d8d08 cf8469a0 00000064 00000000 00000000 GPR08: c03d8d08 00000001 00000001 cf899ba0 22044044 00000000 0fffd000 00000000 GPR16: 0fff3028 0fff6cf0 00000000 0fff8390 0ff494a0 00000004 00000000 00000000 GPR24: c0361a00 00001058 cf9f6600 00009032 cf846800 cf846b80 00000001 00000014 NIP [c02544a0] __netif_schedule+0x28/0x8c LR [c01a17d0] adjust_link+0x124/0x1cc Call Trace: [cf837ef0] [c03fb3a0] 0xc03fb3a0 (unreliable) [cf837f10] [c01a17d0] adjust_link+0x124/0x1cc [cf837f40] [c01a8e28] phy_state_machine+0x2e0/0x448 [cf837f60] [c0040254] run_workqueue+0xc8/0x168 [cf837f90] [c00408d8] worker_thread+0x70/0xd0 [cf837fd0] [c0044630] kthread+0x48/0x84 [cf837ff0] [c0012610] kernel_thread+0x44/0x60 Instruction dump: 7c0803a6 4e800020 3d20c03e 9421ffe0 7c0802a6 7c681b78 39298d08 7c694a78 7d290034 90010024 bfa10014 5529d97e <0f090000> 39600002 38030024 7d200028 ---[ end trace 13dfd73ee42d0c30 ]--- Since the driver is using phylib (which is doing netif_carrier_on/off()), we should simply remove netif_tx_schedule_all() from adjust_link(). Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * netdev: Convert all drivers away from netif_schedule().David S. Miller2008-07-17
| | | | | | | | | | | | | | They logically all want to trigger a schedule for all device TX queues. Signed-off-by: David S. Miller <davem@davemloft.net>
| * gianfar: delete non NAPI code from the driver.Francois Romieu2008-07-11
| | | | | | | | | | | | | | Compile-tested only. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * Merge branch 'master' of ↵David S. Miller2008-05-15
| |\ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/wireless/iwlwifi/iwl-4965-rs.c drivers/net/wireless/rt2x00/rt61pci.c
| * | [netdrvr] Trim trailing whitespace for several driversJeff Garzik2008-05-13
| | | | | | | | | | | | Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* | | gianfar: Add magic packet and suspend/resume support.Scott Wood2008-07-16
| |/ |/| | | | | | | Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | gianfar: Fix a bug where the pointer never moves for dma_unmap...Andy Fleming2008-05-13
| | | | | | | | | | | | | | | | The loop that unmaps all of the TX Buffer Descriptors never actually moves the txbd pointer, so we were just repeatedly unmapping the first one. Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* | gianfar: Fix a locking bug in gianfar's sysfs codeAndy Fleming2008-05-06
|/ | | | | | | | | During sparse cleanup, found a locking bug. Some of the sysfs functions were acquiring a lock, and then returning in the event of an error. We rearrange the code so that the lock is released in error conditions, too. Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* [netdrvr] gianfar: Determine TBIPA value dynamicallyPaul Gortmaker2008-04-29
| | | | | | | | | | | | | | TBIPA needs to be set to a value (on connected MDIO buses) that doesn't conflict with PHYs on the bus. By hardcoding it to 0x1f, we were preventing boards with PHYs at 0x1f from working properly. Instead, scan the bus when it comes up, and find an address that doesn't have a PHY on it. The TBI PHY configuration code then trusts that the value in TBIPA is either safe, or doesn't matter (ie - it's not an active bus with other PHYs). Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* gianfar: Fix skb allocation strategyAndy Fleming2008-04-25
| | | | | | | | | | | | | gianfar was unable to handle failed skb allocation for rx buffers, so we were spinning until it succeeded. Actually, it was worse--we were spinning for a long time, and then silently failing. Instead, we take Stephen Hemminger's suggestion to try the allocation earlier, and drop the packet if it failed. We also make a couple of tweaks to how buffer descriptors are set up. Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* net drivers: fix platform driver hotplug/coldplugKay Sievers2008-04-25
| | | | | | | | | | | | | | | | | | | | | | | | | | Since 43cc71eed1250755986da4c0f9898f9a635cb3bf, the platform modalias is prefixed with "platform:". Add MODULE_ALIAS() to the hotpluggable network platform drivers, to re-enable auto loading. NOTE: didn't change drivers/net/fs_enet/fs_enet-main.c "old binding" support. That looks problematic in the first place (it even uses the ancient "struct device_driver" binding scheme for platform_bus!) and I suspect it will vanish soonish when arch/powerpc rules the world. Also, drivers/net/ne.c would have needed more thought to sort out. [akpm@linux-foundation.org: fix sgiseeq.c] [dbrownell@users.sourceforge.net: more drivers, registration fixes] Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Scott Wood <scottwood@freescale.com> Cc: Vitaly Bordug <vitb@kernel.crashing.org> Cc: Dale Farnsworth <dale@farnsworth.org> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Andrew Victor <andrew@sanpeople.com> Cc: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* gianfar: Support NAPI for TX FramesDai Haruki2008-04-16
| | | | | | | | | | | | Poll the completed TX frames in gfar_poll(). This prevents the tx completion interrupt from interfering with processing of received frames. We also disable hardware rx coalescing when NAPI is enabled. Signed-off-by: Dai Haruki <dai.haruki@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* gianfar: Fix Rx/Tx HW interrupt coalescing counter reset procedure.Andy Fleming2008-03-26
| | | | | | | | | | | | | | - Fix Rx/Tx HW interrupt coalescing counter reset logic. Disabling is required before resetting the counter. - Update the Default both Rx and Tx coalescing timer threshold. Formerly 4 is set which is equal to 1.5 frame at the line rate of 1GbE interface, and it doesn't match to the coalescing frame count which is set to 16. Threashold 21 is matched to frame count 16. Signed-off-by: Dai Haruki <dai.haruki@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* gianfar: Only process completed framesAndy Fleming2008-03-26
| | | | | | | | | | | If the LAST bit is not set in the RxBD, it's possible we're processing an incomplete frame, which is bad. While we're at it, add a constant for the error bitmask, so the whole if-clause fits on one line, and is more legible. Signed-off-by: Dai Haruki <dai.haruki@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* gianfar: Fix frame size calculation when hardware VLAN acceleration is onDai Haruki2008-03-26
| | | | | | | | | | | In gfar_change_mtu(), the frame size needs to be increased to account for the extra 4 bytes VLAN adds to the ethernet header. However, it was being increased by the length of the whole header (18 bytes), which is wrong. Signed-off-by: Dai Haruki <dai.haruki@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* gianfar: don't pass NULL dev ptr to DMA opsBecky Bruce2008-02-23
| | | | | | | | | | Change all dma op invocations in gianfar.c to actually pass in the device pointer. Currently, the value is ignored, but it will be used going forward as we implement archdata for 32-bit powerpc. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Acked-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* gianfar iomem misannotationsAl Viro2008-02-15
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* gianfar: fix compile warningGrant Likely2007-12-04
| | | | | | | | | | Eliminate an uninitialized variable warning. The code is correct, but a pointer to the automatic variable 'addr' is passed to dma_alloc_coherent. Since addr has never been initialized, and the compiler doesn't know what dma_alloc_coherent will do with it, it complains. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* gianfar: fix obviously wrong #ifdef CONFIG_GFAR_NAPI placementAnton Vorontsov2007-10-17
| | | | | | | | | Erroneous #ifdef introduced by 293c8513398657f6263fcdb03c87f2760cf61be4 causing NAPI-less ethernet malfunctioning. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* gianfar: Fix compile regression caused by 09f75cd7Li Yang2007-10-16
| | | | | Signed-off-by: Li Yang <leoli@freescale.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* gianfar: Fix regression caused by new napi interfaceLi Yang2007-10-15
| | | | | | | | Protect all new napi function calls with CONFIG_GFAR_NAPI. Otherwise the driver will stop working when CONFIG_GFAR_NAPI disabled. Signed-off-by: Li Yang <leoli@freescale.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* gianfar: Cleanup compile warning caused by 0795af57Li Yang2007-10-15
| | | | | Signed-off-by: Li Yang <leoli@freescale.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* gianfar: Fix compile regression caused by bea3348eLi Yang2007-10-15
| | | | | Signed-off-by: Li Yang <leoli@freescale.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [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] drivers/net: statistics cleanup #1 -- save memory and shrink codeJeff Garzik2007-10-10
| | | | | | | | | | | | | | | | | We now have struct net_device_stats embedded in struct net_device, and the default ->get_stats() hook does the obvious thing for us. Run through drivers/net/* and remove the driver-local storage of statistics, and driver-local ->get_stats() hook where applicable. This was just the low-hanging fruit in drivers/net; plenty more drivers remain to be updated. [ Resolved conflicts with napi_struct changes and fix sunqe build regression... -DaveM ] Signed-off-by: Jeff Garzik <jeff@garzik.org> 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>
* Fix RGMII-ID handling in gianfarAndy Fleming2007-07-18
| | | | | | | | | | | The TSEC/eTSEC can detect the interface to the PHY automatically, but it isn't able to detect whether the RGMII connection needs internal delay. So we need to detect that change in the device tree, propagate it to the platform data, and then check it if we're in RGMII. This fixes a bug on the 8641D HPCN board where the Vitesse PHY doesn't use the delay for RGMII. Signed-off-by: Andy Fleming <afleming@freescale.com>
* gianfar: add support for SGMIIKapil Juneja2007-07-08
| | | | | | | | | | | | | | | | | | | Add code for initialising and configuring TBI interface and programming it for connecting to on-chip SERDES (Lynx PHY) in case of SGMII mode selected through HRCW at reset. also add defines for TBI register configuration. TBI interface is programmed towards the SERDES. refactored mdio read/write functions to differentiate programming local interface MII regs (e.g., for TBI) from always programming the mdio master (TSEC1, for programming the PHYs). Signed-off-by: Kapil Juneja <Kapil.Juneja@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* gianfar: Fix typo bug introduced by move to udp_hdr()Kumar Gala2007-06-29
| | | | | | | | | | | In commit 4bedb45203eab92a87b4c863fe2d0cded633427f both the udp and tcp cases where changed to use udp_hdr() instead of leaving the tcp case alone and fixing with tcp_hdr(). This ended up causing random behavior with TCP connections because of looking for tcp_hdr()->check in the wrong place. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* network drivers: eliminate unneeded kill_vid codeStephen Hemminger2007-06-03
| | | | | | | | | | | | Many drivers had code that did kill_vid, but they weren't doing vlan filtering. With new API the stub is unneeded unless device sets NETIF_F_HW_VLAN_FILTER. Bad habit: I couldn't resist fixing a couple of nearby style things in acenic, and forcedeth. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* gianfar: Add I/O barriers when touching buffer descriptor ownership.Scott Wood2007-05-17
| | | | | | | | | | | | | | The hardware must not see that is given ownership of a buffer until it is completely written, and when the driver receives ownership of a buffer, it must ensure that any other reads to the buffer reflect its final state. Thus, I/O barriers are added where required. Without this patch, I have observed GCC reordering the setting of bdp->length and bdp->status in gfar_new_skb. Hardware reordering was also theoretically possible. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [SK_BUFF]: Introduce skb_network_header_lenArnaldo Carvalho de Melo2007-04-26
| | | | | | | | | | For the common sequence "skb->h.raw - skb->nh.raw", similar to skb->mac_len, that is precalculated tho, don't think we need to bloat skb with one more member, so just use this new helper, reducing the number of non-skbuff.h references to the layer headers even more. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SK_BUFF]: Introduce udp_hdr(), remove skb->h.uhArnaldo Carvalho de Melo2007-04-26
| | | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iphArnaldo Carvalho de Melo2007-04-26
| | | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SK_BUFF]: Introduce skb_network_offset()Arnaldo Carvalho de Melo2007-04-26
| | | | | | | For the quite common 'skb->nh.raw - skb->data' sequence. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [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>
* [GIANFAR]: Fix compile error in latest gitJan Altenberg2007-03-05
| | | | | | | | | | | | | | | | | I recognized a compile error in latest git: /here/workdir/git/drivers/net/gianfar.c: In function `gfar_vlan_rx_kill_vid': /here/workdir/git/drivers/net/gianfar.c:1135: error: structure has no member named `vgrp' This error was introduced in commit: commit 6d04e3b04b6ab569cabeb5ca28ad1be11777e895 ... [VLAN]: Avoid a 4-order allocation. Signed-off-by: Jan Altenberg <jan@linutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* [VLAN]: Avoid a 4-order allocation.Dan Aloni2007-03-02
| | | | | | | | | | | | | | This patch splits the vlan_group struct into a multi-allocated struct. On x86_64, the size of the original struct is a little more than 32KB, causing a 4-order allocation, which is prune to problems caused by buddy-system external fragmentation conditions. I couldn't just use vmalloc() because vfree() cannot be called in the softirq context of the RCU callback. Signed-off-by: Dan Aloni <da-x@monatomic.org> Acked-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* gianfar: don't duplicate gfar_error()Sergei Shtylyov2007-02-17
| | | | | | | | | | | It was hardly necessary to repeat most of the code from gfar_error() in gfar_interrupt(), especially having some inconsistencies between the two. So, make the gfar_interrupt() just call gfar_error(), and not acknowledge the interrupts itself as gfar_{receive/transmit/error}() do it anyway. While at it, also clarify/cleanup debug messages in gfar_error()... Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] remove many unneeded #includes of sched.hTim Schmielau2007-02-14
| | | | | | | | | | | | | | | | | | | | | | | | After Al Viro (finally) succeeded in removing the sched.h #include in module.h recently, it makes sense again to remove other superfluous sched.h includes. There are quite a lot of files which include it but don't actually need anything defined in there. Presumably these includes were once needed for macros that used to live in sched.h, but moved to other header files in the course of cleaning it up. To ease the pain, this time I did not fiddle with any header files and only removed #includes from .c-files, which tend to cause less trouble. Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha, arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig, allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all configs in arch/arm/configs on arm. I also checked that no new warnings were introduced by the patch (actually, some warnings are removed that were emitted by unnecessarily included header files). Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] PHY: Add support for configuring the PHY connection interfaceAndy Fleming2006-12-02
| | | | | | | | | | | | | | | | | | | | Most PHYs connect to an ethernet controller over a GMII or MII interface. However, a growing number are connected over different interfaces, such as RGMII or SGMII. The ethernet driver will tell the PHY what type of connection it is by setting it manually, or passing it in through phy_connect (or phy_attach). Changes include: * Updates to documentation * Updates to PHY Lib consumers * Changes to PHY Lib to add interface support * Some minor changes to whitespace in phy.h * gianfar driver now detects interface and passes appropriate value to PHY Lib Signed-off-by: Andrew Fleming <afleming@freescale.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] add netpoll support for gianfar: respinVitaly Wool2006-12-02
| | | | | | | | | | The patch inlined below adds NET_POLL_CONTROLLER support for gianfar network driver, slightly modified wrt the comments from Andy Fleming. drivers/net/gianfar.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) Signed-off-by: Vitaly Wool <vwool@ru.mvista.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* 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)
* Merge branch 'upstream-linus' of ↵Linus Torvalds2006-09-24
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6 * '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.
| * drivers/net: const-ify ethtool_ops declarationsJeff Garzik2006-09-13
| | | | | | | | Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * drivers/net: Trim trailing whitespaceJeff Garzik2006-09-13
| | | | | | | | Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * [PATCH] Remove more unnecessary driver printk'sAndy Gospodarek2006-09-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | As I promised last week, here is the first pass at removing all unnecessary printk's that exist in network device drivers currently in promiscuous mode. The duplicate messages are not needed so they have been removed. Some of these drivers are quite old and might not need an update, but I did them all anyway. I am currently auditing the remaining conditional printk's and will send out a patch for those soon. Signed-off-by: Andy Gospodarek <andy@greyhouse.net> Signed-off-by: Jeff Garzik <jeff@garzik.org>
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