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path: root/drivers/net/spider_net.c
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* spidernet: revise link status loggingIshizaki Kou2008-04-16
| | | | | | | | | | | | This patch revises the logging for link informations of spidernet. - The link down message is too verbose because auto-negotiation timeout occurs periodically while an ethernet cable is not connected. - We want to see the link result, and we think it should be displayed. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Jens Osterkamp <jens@de.ibm.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* spidernet: fix error interrupt handlingIshizaki Kou2008-04-16
| | | | | | | | | | | | | | | | In addition to the value of GHIINT0STS, spidernet interrupt handler should check the values of GHIINT1STS/GHIINT2STS registers at the beginning of spider_net_interrupt() so as not to drop error interrupts. GHIINT1STS/GHIINT2STS registers indicates some of erroneous conditions in spidernet, and a few bits of GHIINT0STS register reflects these conditions. But GHIINT0MSK masks these bits, so you should check these conditions by reading GHIINT1STS/GHIINT2STS registers directly. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Jens Osterkamp <jens@de.ibm.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* spidernet: add missing initializationIshizaki Kou2008-04-16
| | | | | | | | | This patch fixes initialization of "aneg_count" and "medium" fields in spider_net_card to make spidernet driver correctly sets "link status". Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Jens Osterkamp <jens@de.ibm.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* Fix misspellings of "system", "controller", "interrupt" and "necessary".Robert P. J. Day2007-10-19
| | | | | | | | Fix the various misspellings of "system", controller", "interrupt" and "[un]necessary". Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
* remove asm/bitops.h includesJiri Slaby2007-10-19
| | | | | | | | | | | | | remove asm/bitops.h includes including asm/bitops directly may cause compile errors. don't include it and include linux/bitops instead. next patch will deny including asm header directly. Cc: Adrian Bunk <bunk@kernel.org> Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [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>
* spidernet: fix interrupt reason recognitionIshizaki Kou2007-09-13
| | | | | | | | | | | | | | | | | | | | | | | | | This patch solves a problem that the spidernet driver sometimes fails to handle IRQ. The problem happens because, - In Cell architecture, interrupts may arrive at an interrupt controller, even if they are masked by the setting on registers of devices. It happens when interrupt packets are sent just before the interrupts are masked. - spidernet interrupt handler compares interrupt reasons with interrupt masks, so when such interrupts occurs, spidernet interrupt handler returns IRQ_NONE. - When all of interrupt handler return IRQ_NONE, linux kernel disables the IRQ and it no longer delivers interrupts to the interrupt handlers. spidernet doesn't work after above sequence, because it can't receive interrupts. This patch changes spidernet interrupt handler that it compares interrupt reason with SPIDER_NET_INTX_MASK_VALUE. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: improve interrupt handlingIshizaki Kou2007-07-10
| | | | | | | | | | | | | | | | | | | We intend this patch to improve spidernet interrupt handling to be more strict. We had following problem and this patch solves it. -when CONFIG_DEBUG_SHIRQ=y, request_irq() calls handler(). -when spider_net_open() is called, it calls request_irq() which calls spider_net_interrupt(). -if some specific interrupt bit is set at this timing, it calls netif_rx_schedule() and spider_net_poll() is scheduled. -spider_net_open() calls netif_poll_enable() which clears the bit __LINK_STATE_RX_SCHED. -when spider_net_poll() is called, it calls netif_rx_complete() which causes BUG_ON() because __LINK_STATE_RX_SCHED is not set. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: Replace literal with constLinas Vepstas2007-07-08
| | | | | | | Replace literal with const; add bit definitions. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: fix misnamed flagLinas Vepstas2007-07-08
| | | | | | | | | | The transmit frame tail bit is stranglely misnamed as "no checksum". Fix the name to what it should be: "transmit frame tail". No functional change, just a name change. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: move a block of code aroundLinas Vepstas2007-07-08
| | | | | | | | Put the enable and disable routines next to one-another, as this makes verifying thier symmetry that much easier. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: service TX later.Linas Vepstas2007-07-08
| | | | | | | | | When entering the netdev poll routine, empty out the RX chain first, before cleaning up the TX chain. This should help avoid RX buffer overflows. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: invalidate unused pointer.Linas Vepstas2007-07-08
| | | | | | | | | Invalidate a pointer as its pci_unmap'ed; this is a bit of paranoia to make sure hardware doesn't continue trying to DMA to it. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: enhance the dump routineLinas Vepstas2007-07-08
| | | | | | | | | Crazy device problems are hard to debug, when one does not have good trace info. This patch makes a major enhancement to the device dump routine. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: beautify error messagesLinas Vepstas2007-07-08
| | | | | | | Use dev_err() to print device error messages. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: checksum and ethtoolStephen Hemminger2007-06-20
| | | | | | | | | | | | | It doesn't look like spidernet hardware can really checksum all protocols, the code looks like it does IPV4 only. If so, it should use NETIF_F_IP_CSUM instead of NETIF_F_HW_CSUM. The driver doesn't need it's own get/set for ethtool tx csum, and it should use the standard ethtool_op_get_link. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: silence the ramfull messagesLinas Vepstas2007-06-20
| | | | | | | | | | Although the previous patch resolved issues with hangs when the RX ram full interrupt is encountered, there are still situations where lots of RX ramfull interrupts arrive, resulting in a noisy log in syslog. There is no need for this. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: Don't terminate the RX ringLinas Vepstas2007-06-20
| | | | | | | | | | | The terminated RX ring will cause trouble during the RX ram full conditions, leading to a hung driver, as the hardware can't find the next descr. There is no real reason to terminate the RX ring; it doesn't make the operation any smooother, and it does require an extra sync. So don't do it. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: Cure RX ram full bugLinas Vepstas2007-06-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes a rare deadlock that can occur when the kernel is not able to empty out the RX ring quickly enough. Below follows a detailed description of the bug and the fix. As long as the OS can empty out the RX buffers at a rate faster than the hardware can fill them, there is no problem. If, for some reason, the OS fails to empty the RX ring fast enough, the hardware GDACTDPA pointer will catch up to the head, notice the not-empty condition, ad stop. However, RX packets may still continue arriving on the wire. The spidernet chip can save some limited number of these in local RAM. When this local ram fills up, the spider chip will issue an interrupt indicating this (GHIINT0STS will show ERRINT, and the GRMFLLINT bit will be set in GHIINT1STS). When te RX ram full condition occurs, a certain bug/feature is triggered that has to be specially handled. This section describes the special handling for this condition. When the OS finally has a chance to run, it will empty out the RX ring. In particular, it will clear the descriptor on which the hardware had stopped. However, once the hardware has decided that a certain descriptor is invalid, it will not restart at that descriptor; instead it will restart at the next descr. This potentially will lead to a deadlock condition, as the tail pointer will be pointing at this descr, which, from the OS point of view, is empty; the OS will be waiting for this descr to be filled. However, the hardware has skipped this descr, and is filling the next descrs. Since the OS doesn't see this, there is a potential deadlock, with the OS waiting for one descr to fill, while the hardware is waiting for a differen set of descrs to become empty. A call to show_rx_chain() at this point indicates the nature of the problem. A typical print when the network is hung shows the following: net eth1: Spider RX RAM full, incoming packets might be discarded! net eth1: Total number of descrs=256 net eth1: Chain tail located at descr=255 net eth1: Chain head is at 255 net eth1: HW curr desc (GDACTDPA) is at 0 net eth1: Have 1 descrs with stat=xa0800000 net eth1: HW next desc (GDACNEXTDA) is at 1 net eth1: Have 127 descrs with stat=x40800101 net eth1: Have 1 descrs with stat=x40800001 net eth1: Have 126 descrs with stat=x40800101 net eth1: Last 1 descrs with stat=xa0800000 Both the tail and head pointers are pointing at descr 255, which is marked xa... which is "empty". Thus, from the OS point of view, there is nothing to be done. In particular, there is the implicit assumption that everything in front of the "empty" descr must surely also be empty, as explained in the last section. The OS is waiting for descr 255 to become non-empty, which, in this case, will never happen. The HW pointer is at descr 0. This descr is marked 0x4.. or "full". Since its already full, the hardware can do nothing more, and thus has halted processing. Notice that descrs 0 through 254 are all marked "full", while descr 254 and 255 are empty. (The "Last 1 descrs" is descr 254, since tail was at 255.) Thus, the system is deadlocked, and there can be no forward progress; the OS thinks there's nothing to do, and the hardware has nowhere to put incoming data. This bug/feature is worked around with the spider_net_resync_head_ptr() routine. When the driver receives RX interrupts, but an examination of the RX chain seems to show it is empty, then it is probable that the hardware has skipped a descr or two (sometimes dozens under heavy network conditions). The spider_net_resync_head_ptr() subroutine will search the ring for the next full descr, and the driver will resume operations there. Since this will leave "holes" in the ring, there is also a spider_net_resync_tail_ptr() that will skip over such holes. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: null out skb pointer after its been used.Linas Vepstas2007-06-20
| | | | | | | | | | | | Avoid kernel crash in mm/slab.c due to double-free of pointer. If the ethernet interface is brought down while there is still RX traffic in flight, the device shutdown routine can end up trying to double-free an skb, leading to a crash in mm/slab.c Avoid the double-free by nulling out the skb pointer. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.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>
* spidernet: skb used after netif_receive_skbFlorin Malita2007-05-24
| | | | | | | | | | The stats update code in spider_net_pass_skb_up() is touching the skb after it's been passed up to the stack. To avoid that, just update the stats first. Signed-off-by: Florin Malita <fmalita@gmail.com> Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: node-aware skbuff allocationChristoph Hellwig2007-05-17
| | | | | | | | | Spidernet was the driver I original did all the node-aware netdevice allocation for, but after a year it still hasn't hit mainline. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: remove unnecessary accesses to phyIshizaki Kou2007-05-11
| | | | | | | | This patch removes unnecessary accesses to phy registers. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [POWERPC] Rename get_property to of_get_property: driversStephen Rothwell2007-05-02
| | | | | | | | These are all the remaining instances of get_property. Simple rename of get_property to of_get_property. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [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>
* [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>
* spidernet: Fix problem sending IP fragmentsLinas Vepstas2007-04-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The basic structure of "normal" UDP/IP/Ethernet frames (that actually work): - It starts with the Ethernet header (dest MAC, src MAC, etc.) - The next part is occupied by the IP header (version info, length of packet, id=0, fragment offset=0, checksum, from / to address, etc.) - Then comes the UDP header (src / dest port, length, checksum) - Actual payload - Ethernet checksum Now what's different for IP fragment: - The IP header has id set to some value (same for all fragments), offset is set appropriately (i.e. 0 for first fragment, following according to size of other fragments), size is the length of the frame. - UDP header is unchanged. I.e. length is according to full UDP datagram, not just the part within the actual frame! But this is only true within the first frame: all following frames don't have a valid UDP-header at all. The spidernet silicon seems to be quite intelligent: It's able to compute (IP / UDP / Ethernet) checksums on the fly and tests if frames are conforming to RFC -- at least conforming to RFC on complete frames. But IP fragments are different as explained above: I.e. for IP fragments containing part of a UDP datagram it sees incompatible length in the headers for IP and UDP in the first frame and, thus, skips this frame. But the content *is* correct for IP fragments. For all following frames it finds (most probably) no valid UDP header at all. But this *is* also correct for IP fragments. The Linux IP-stack seems to be clever in this point. It expects the spidernet to calculate the checksum (since the module claims to be able to do so) and marks the skb's for "normal" frames accordingly (ip_summed set to CHECKSUM_HW). But for the IP fragments it does not expect the driver to be capable to handle the frames appropriately. Thus all checksums are allready computed. This is also flaged within the skb (ip_summed set to CHECKSUM_NONE). Unfortunately the spidernet driver ignores that hints. It tries to send the IP fragments of UDP datagrams as normal UDP/IP frames. Since they have different structure the silicon detects them the be not "well-formed" and skips them. The following one-liner against 2.6.21-rc2 changes this behavior. If the IP-stack claims to have done the checksumming, the driver should not try to checksum (and analyze) the frame but send it as is. Signed-off-by: Norbert Eicker <n.eicker@fz-juelich.de> Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: janitorial, typosLinas Vepstas2007-02-27
| | | | | | | | | Janitorial patch. Undo long lines, fix typo in err msg. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: Jens Osterkamp <Jens.Osterkamp@de.ibm.com> Cc: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: transmit raceLinas Vepstas2007-02-27
| | | | | | | | | | | Multiple threads performing a transmit can race into the spidernet tx ring cleanup code. This puts the relevant check under a lock. Signed-off-by: Linas Vepstas <lins@austin.ibm.com> Cc: Jens Osterkamp <Jens.Osterkamp@de.ibm.com> Cc: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: fix racy double-free of skbLinas Vepstas2007-02-27
| | | | | | | | | | | | It appears that under certain circumstances, a race will result in a double-free of an skb. This patch null's out the skb pointer upon the skb free, avoiding the inadvertent deref of bogus data. The next patch fixes the actual race. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: Jens Osterkamp <Jens.Osterkamp@de.ibm.com> Cc: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: separate hardware state from driver state.Linas Vepstas2007-02-27
| | | | | | | | | | | This patch separates the hardware descriptor state from the driver descriptor state, per (old) suggestion from Ben Herrenschmidt. This compiles and boots and seems to work. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: Jens Osterkamp <Jens.Osterkamp@de.ibm.com> Cc: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: move medium variable into card structJens Osterkamp2007-02-27
| | | | | | | | | This moves the medium variable into the spidernet card structure. It renames the GMII_ variables to BCM54XX specific ones. Signed-off-by: Jens Osterkamp <jens@de.ibm.com> Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: remove txram full loggingIshizaki Kou2007-02-27
| | | | | | | | | | This patches removes logging for SPIDER_NET_GTMFLLINT interrupts. Since the interrupts are not irregular, and they happen frequently when using 100Mbps network switches. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: spidernet: add support for CellebKou Ishizaki2007-02-27
| | | | | | | | | This patch adds or changes some HW specific settings for spider_net on Celleb. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: load firmware when openKou Ishizaki2007-02-27
| | | | | | | | | This patch moves calling init_firmware() from spider_net_probe() to spider_net_open() so as to use the driver by built-in. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: autoneg support for CellebKou Ishizaki2007-02-27
| | | | | | | | Add auto negotiation support for Celleb. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: compile break.Linas Vepstas2007-02-27
| | | | | | | | | | | | As of 2.6.20-git4, the spider_net driver does not compile. This appears to be due to some archaic usage involving kobjects. It also fixes a nasty double-free during ifdown of the interface. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: Jens Osterkamp <Jens.Osterkamp@de.ibm.com> Cc: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] spider_net breakage from class_device -> deviceAl Viro2007-02-09
| | | | | | Acked-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Spidernet: Rework RX linked listLinas Vepstas2007-02-07
| | | | | | | | | | | Make the hardware perceive the RX descriptor ring as a null-terminated linked list, instead of a circular ring. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: James K Lewis <jklewis@us.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Spidernet RX Debugging printoutLinas Vepstas2007-02-05
| | | | | | | | | | | | | | | Add some debugging and error printing. The show_rx_chain() prints out the status of the rx chain, which shows that the status of the descriptors gets messed up after the second & subsequent RX ramfulls. Print out contents of bad packets if error occurs. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: James K Lewis <jklewis@us.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Spidernet Avoid possible RX chain corruptionLinas Vepstas2007-02-05
| | | | | | | | | | | Delete possible source of chain corruption; the hardware already knows the location of the tail, and writing it again is likely to mess it up. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: James K Lewis <jklewis@us.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Spidernet Memory barrierLinas Vepstas2007-02-05
| | | | | | | | | | | Add memory barrier to make sure that the rest of the RX descriptor state is flushed to memory before we tell the hardware that its ready to go. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: James K Lewis <jklewis@us.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Spidernet RX Chain tailLinas Vepstas2007-02-05
| | | | | | | | | | Tell the hardware the location of the rx ring tail. More punctuation cleanup. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: James K Lewis <jklewis@us.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Spidernet Remove unused variableLinas Vepstas2007-02-05
| | | | | | | | | | Remove unused variable; this makes code easier to read. Tweak commentary. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: James K Lewis <jklewis@us.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Spidernet RX RefillLinas Vepstas2007-02-05
| | | | | | | | | | The invocation of the rx ring refill routine is haphazard, it can be called from a central location. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: James K Lewis <jklewis@us.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Spidernet Cleanup return codesLinas Vepstas2007-02-05
| | | | | | | | | | Simplify the somewhat convoluted use of return codes in the rx buffer handling. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: James K Lewis <jklewis@us.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Spidernet another skb mem leakLinas Vepstas2007-02-05
| | | | | | | | | | | Another skb leak in an error branch. Fix this by adding call to dev_kfree_skb_irq() after moving to a more appropriate spot. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: James K Lewis <jklewis@us.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
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