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2007-10-10[NET]: Make NAPI polling independent of struct net_device objects.Stephen Hemminger1-26/+32
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>
2007-10-05r8169: revert part of 6dccd16b7c2703e8bbf8bca62b5cf248332afbe2Francois Romieu1-3/+13
The 8169/8110SC currently announces itself as: [...] eth0: RTL8169sc/8110sc at 0x........, ..:..:..:..:..:.., XID 18000000 IRQ .. ^^^^^^^^ It uses RTL_GIGA_MAC_VER_05 and this part of the changeset can cut its performance by a factor of 2~2.5 as reported by Timo. (the driver includes code just before the hunk to write the ChipCmd register when mac_version == RTL_GIGA_MAC_VER_0[1-4]) Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Timo Jantunen <jeti@welho.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-09-19r8169: workaround against ignored TxPoll writes (8168)Francois Romieu1-0/+9
The 8168 ignores the requests to fetch the Tx descriptors when the relevant TxPoll bit is already set. It easily kills the performances of the 8168. David Gundersen has noticed that it is enough to wait for the completion of the DMA transfer (NPQ bit is cleared) before writing the TxPoll register again. The extra IO traffic added by the proposed workaround could be minimalized but it is not a high-priority task. Fix for: http://bugzilla.kernel.org/show_bug.cgi?id=7924 http://bugzilla.kernel.org/show_bug.cgi?id=8688 (http://bugzilla.kernel.org/show_bug.cgi?id=7555 ?) Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: David Gundersen <gundy@iinet.net.au> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-09-19r8169: correct phy parameters for the 8110SCEdward Hsu1-1/+4
The phys of the 8110SC (RTL_GIGA_MAC_VER_{05/06}) act abnormally in gigabit mode if they are applied the parameters in rtl8169_hw_phy_config which actually aim the 8110S/SB. It is ok to return early from rtl8169_hw_phy_config as it does not apply to the 8101 and 8168 families. Signed-off-by: Edward Hsu <edward_hsu@realtek.com.tw> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2007-08-07Merge branch 'r8169-for-jeff-20070806' of git://electric-eye.fr.zoreil.com/home/romieu/linux-2.6 into upstream-fixesJeff Garzik1-8/+16
2007-08-07r8169: avoid needless NAPI poll schedulingFrancois Romieu1-8/+10
Theory : though needless, it should not have hurt. Practice: it does not play nice with DEBUG_SHIRQ + LOCKDEP + UP (see https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=242572). The patch makes sense in itself but I should dig why it has an effect on #242572 (assuming that NAPI do not change in a near future). Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-08-06r8169: PHY power-on fixRoger So1-0/+6
Fix extracted from Realtek's driver (8.002.00/20070713) for the PHY attached to 8111/8168b chipsets. The check against mac_version is just usual paranoia during the bugfix period of the kernel cycle. -- FR Tested on Asus M2A-VM motherboard by Roger So. No regression on my Asrock 945G DVI either (built-in 8168 + 2x8169). Signed-off-by: Roger So <roger.so@gmail.com> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-31[NET]: ethtool_perm_addr only has one implementationMatthew Wilcox1-1/+0
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>
2007-07-17drivers/*: mark variables with uninitialized_var()Jeff Garzik1-1/+1
Mark variables in drivers/* with uninitialized_var() if such a warning appears, and analysis proves that the var is initialized properly on all paths it is used. Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-07-08r8169: perform RX config change after mac filteringFrancois Romieu1-1/+2
It does not really make sense to update the RX config register before the mac filtering registers. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: mac address change supportFrancois Romieu1-0/+36
Merged from Realtek's r8169-6.001 driver. I have added some locking to protect against the arp monitoring timer in the bonding driver. Accessing the configuration registers is otherwise performed under RTNL locking. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: display some extra debug information during startupFrancois Romieu1-2/+4
It does not cost much and it will ease the identification of (so far) unknown devices. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: add endianess annotations to [RT]xDescRolf Eike Beer1-6/+6
Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: align the IP header when there is no DMA constraintFrancois Romieu1-3/+6
Align the IP header when the chipset can DMA at any location (plain 0x8169). Otherwise (0x8136/0x8168) obey the constraint imposed by the hardware. This patch complements the previous alignment rework done for copybreak. Original idea from Philip Craig <philipc@snapgear.com> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Philip Craig <philipc@snapgear.com> Cc: Mike Isely <isely@pobox.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: add bit description for the TxPoll registerFrancois Romieu1-1/+6
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: cleanupFrancois Romieu1-202/+145
No functionnal change: - trim the old history log - whitespace/indent/case police - unsigned int where signedness does not matter - removal of obsolete assert - needless cast from void * (dev_instance) - remove dead code once related to power management - use netdev_alloc_skb. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Stephen Hemminger <shemminger@linux-foundation.org> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: remove the media optionFrancois Romieu1-67/+5
It has been documented as deprecated: - in MODULE_PARM_DESC since may 2005 ; - at the top of the source file and in printk since june 2004. Good bye. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: small 8101 commentFrancois Romieu1-0/+4
Extracted from version 1.001.00 of Realtek's r8101. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: confusion between hardware and IP header alignmentFrancois Romieu1-7/+5
The rx copybreak part is straightforward. The align field in struct rtl_cfg_info is related to the alignment requirements of the DMA operation. Its value is set at 2 to limit the scale of possible regression but my old v1.21 8169 datasheet claims a 8 bytes requirements (which never appeared in the driver, of course) and the 8101/8168 go with a plain 8 bytes alignment. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: merge with version 8.001.00 of Realtek's r8168 driverFrancois Romieu1-30/+89
This one includes: - more tweaks to rtl_hw_start_8168 - a work around for a Rx FiFO overflow issue on the 8168Bb - rtl8169_{intr_mask/napi_event} are replaced with per-device fields, namely tp->{intr/napi}_event - rtl_cfg_info is converted to C99 for readability but the values are not changed for the 8169/8110 and the 8101 Includes ChipCmd fix from Bernhard Walle <bwalle@suse.de> (2007/02/24). Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: merge with version 6.001.00 of Realtek's r8169 driverFrancois Romieu1-35/+55
- new identifier for the 8110SCe - the PCI latency timer is set unconditionally. This part is identical in Realtek's r8168 (8.001.00) and r8101 (1.001.00) - initialization of the cache line size register is for the 8169s only - more magic in rtl_hw_start_8169 - it is not possible to factor out the setting of the the irq event mask with the 8168 and the 8101 any more. Pushed it into the hw_start handler. - rtl_set_rx_tx_config_registers() and write to the ChipCmd register are issued identically for the whole 8169/8110 family: the 8110SCd/8110SCe are handled the same way - work around for AMD platform. Some registers definitions in Realtek's driver are let aside for later. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: prettify mac_versionFrancois Romieu1-10/+10
...still a bit yucky though. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: populate the hw_start handler for the 8110Francois Romieu1-9/+38
Same thing as the previous change for rtl_hw_start_8168. The 8101 related code in rtl_hw_start_8169 (see RTL_GIGA_MAC_VER_13) goes away. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: populate the hw_start handler for the 8168Francois Romieu1-3/+31
rtl_hw_start_8168 inherits the content of rtl_hw_start_8169 minus the code which depends on RTL_GIGA_MAC_VER_XY (XY != {11/12}). Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: add helpers for per-device hw_start handlerFrancois Romieu1-18/+35
They aim to limit the amount of moved code when the hw_start handler gets more specialized. No functional change. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: add hooks for per-device hw_start handlerFrancois Romieu1-19/+45
Rationale: rtl8169_hw_start will not help maintaining an unified driver for different chipsets but people at Realtek are probably too polite to say it distinctly. Let's add the hook and keep hw_start handler unchanged. As can be seen from the content of rtl8169_pci_tbl, the RTL_CFG_1 entry in rtl_cfg_info was unused. I recycled it for the 0x8168. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: Rx path updateStephen Hemminger1-28/+28
- pci_dma_sync_single_for_cpu is not needed for a single large packet - remove the function pointer to help gcc optimizing the inline pci_dma functions. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: kill eth_copy_and_sum()David S. Miller1-1/+1
It hasn't "summed" anything in over 7 years, and it's just a straight mempcy ala skb_copy_to_linear_data() so just get rid of it. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: de-obfuscate modulo arithmeticFrancois Romieu1-1/+3
The former style suggests a modulo arithmetic misuse but the expression should never be < 0. Even if it does, the driver will simply loop longer than expected (not that the remaining parts of the system will necessarily appreciate it...). Let's warn the user when something goes wrong and try to go over it. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-07-08r8169: use netdev_alloc_skbStephen Hemminger1-13/+14
Use netdev_alloc_skb and remove the useless sk_buff * argument of rtl8169_alloc_rx_skb. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <edward_hsu@realtek.com.tw>
2007-06-03network drivers: eliminate unneeded kill_vid codeStephen Hemminger1-11/+0
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>
2007-04-25[SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iphArnaldo Carvalho de Melo1-1/+1
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-04-25[ETH]: Make eth_type_trans set skb->dev like the other *_type_transArnaldo Carvalho de Melo1-1/+0
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>
2007-04-03r8169: fix suspend/resume for down interfaceFrancois Romieu1-6/+7
The PM hooks are no-op if the r8169 interface is down (i.e. !IFF_UP). However, as the chipset is enabled, the device will not work after a suspend/resume cycle. The patch always issue the required PCI suspend sequence and removes the module unload/reload workaround. Signed-off-by: Arnaud Patard <apatard@mandriva.com> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-04-03r8169: issue request_irq after the private data are completely initializedFrancois Romieu1-15/+18
The irq handler schedules a NAPI poll request unconditionally as soon as the status register is not clean. It has been there - and wrong - for ages but a recent timing change made it apparently easier to trigger. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Jay Cliburn <jacliburn@bellsouth.net> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-03-09r8169: fix a race between PCI probe and dev_openFrancois Romieu1-5/+5
Initialize the timer with the rest of the private-struct. Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-03-09r8169: revert bogus BMCR resetFrancois Romieu1-2/+2
Added during bf793295e1090af84972750898bf8470df5e5419 The current code requests a reset but prohibits autoneg, 1000 Mb/s, 100 Mb/s and full duplex. The 8168 does not like it at all. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-03-02[VLAN]: Avoid a 4-order allocation.Dan Aloni1-2/+1
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>
2007-02-20r8169: RTNL and flush_scheduled_work deadlockFrancois Romieu1-7/+18
flush_scheduled_work() in net_device->close has a slight tendency to deadlock with tasks on the workqueue that hold RTNL. rtl8169_close/down simply need the recovery tasks to not meddle with the hardware while the device is going down. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-09[PATCH] uintptr_t is unsigned long, not u32Al Viro1-2/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2006-12-26r8169: extraneous Cmd{Tx/Rx}Enb writeFrancois Romieu1-1/+0
Checked in Realtek's driver, this one has no business being there. The driver still works but there is a noticeable performance drop. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-12-26r8169: use the broken_parity_status field in pci_devFrancois Romieu1-4/+1
The former option is removed and platform code can now specify the expected behavior. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-07Merge tag 'r8169-upstream-20061204-00' of git://electric-eye.fr.zoreil.com/home/romieu/linux-2.6 into upstreamJeff Garzik1-25/+59
2006-12-05Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6David Howells1-4/+22
Conflicts: drivers/infiniband/core/iwcm.c drivers/net/chelsio/cxgb2.c drivers/net/wireless/bcm43xx/bcm43xx_main.c drivers/net/wireless/prism54/islpci_eth.c drivers/usb/core/hub.h drivers/usb/input/hid-core.c net/core/netpoll.c Fix up merge failures with Linus's head and fix new compilation failures. Signed-Off-By: David Howells <dhowells@redhat.com>
2006-12-04r8169: more alignment for the 0x8168Francois Romieu1-2/+2
Two thirds of packets are lost because of misalignment. Users of Asus laptop did apparently not notice it. Reported on Gigabyte GA-945GM-S2. Fix for http://bugzilla.kernel.org/show_bug.cgi?id=7517 Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-12-04r8169: phy program updateFrancois Romieu1-5/+0
This is commented out in Realtek's driver as well. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-12-04r8169: tweak the PCI data parity error recoveryFrancois Romieu1-4/+13
The 8110SB based n2100 board signals a lot of what ought to be PCI data parity errors durint operation of the 8169 as target. Experiment proved that the driver can ignore the error and process the packet as if nothing had happened. Let's add an ad-hoc knob to enable users to fix their system while avoiding the risks of a wholesale change. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
2006-12-04r8169: more magic during initialization of the hardwareFrancois Romieu1-14/+44
Mostly taken from Realtek's driver. It's a bit yucky but the original is even worse. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Darren Salt <linux@youmustbejoking.demon.co.uk>
2006-12-02r8169: perform a PHY reset before any other operation at boot timeFrancois Romieu1-2/+20
Realtek's 8139/810x (0x8136) PCI-E comes with a touchy PHY. A big heavy reset seems to calm it down. Fix for http://bugzilla.kernel.org/show_bug.cgi?id=7378. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Darren Salt <linux@youmustbejoking.demon.co.uk>
2006-11-29[PATCH] r8169: Fix iteration variable signFrancois Romieu1-2/+2
This changes the type of variable "i" in rtl8169_init_one() from "unsigned int" to "int". "i" is checked for < 0 later, which can never happen for "unsigned". This results in broken error handling. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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