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path: root/drivers/net/ibmveth.h
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* ehea/ibm*: Move the IBM driversJeff Kirsher2011-08-111-195/+0
| | | | | | | | | | | | | | | | | | | Move the IBM drivers into drivers/net/ethernet/ibm/ and make the necessary Kconfig and Makefile changes. - Renamed ibm_new_emac to emac - Cleaned up Makefile and Kconfig options which referred to IBM_NEW_EMAC to IBM_EMAC - ibmlana driver is a National Semiconductor SONIC driver so it was not moved CC: Christoph Raisch <raisch@de.ibm.com> CC: Santiago Leon <santil@linux.vnet.ibm.com> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: David Gibson <dwg@au1.ibm.com> CC: Kyle Lucke <klucke@us.ibm.com> CC: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
* ibmveth: Update module information and versionSantiago Leon2010-09-061-23/+25
| | | | | | | | | | | | Add an entry to the MAINTAINERS file for ibmveth, clean up the copyright and add all authors. Change the name of the module to reflect the product name over the last number of years. Considering all the changes we have made, bump the driver version. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Santiago Leon <santil@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ibmveth: Some formatting fixesSantiago Leon2010-09-061-3/+3
| | | | | | | | | | | IbmVethNumBufferPools -> IBMVETH_NUM_BUFF_POOLS Also change IBMVETH_MAX_MTU -> IBMVETH_MIN_MTU, it refers to the minimum size not the maximum. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Santiago Leon <santil@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ibmveth: Enable IPv6 checksum offloadSantiago Leon2010-09-061-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | This patch enables TCP checksum offload support for IPv6 on ibmveth. This completely eliminates the generation and checking of the checksum for IPv6 packets that are completely virtual and never touch a physical network. A basic TCPIPV6_STREAM netperf run showed a ~30% throughput improvement when an MTU of 64000 was used. This featured is enabled by default, as is the case for IPv4 checksum offload. When checksum offload is enabled the driver will negotiate IPv4 and IPv6 offload with the firmware separately and enable what is available. As long as either IPv4 or IPv6 offload is supported and enabled the device will report that checksum offload is enabled. The device stats, available through ethtool, will display which checksum offload features are supported/enabled by firmware. Performance testing against a stock kernel shows no regression for IPv4 or IPv6 in terms of throughput or processor utilization with checksum disabled or enabled. Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: Santiago Leon <santil@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ibmveth: Remove LLTXSantiago Leon2010-09-061-1/+0
| | | | | | | | | | | | The ibmveth adapter needs locking in the transmit routine to protect the bounce_buffer but it sets LLTX and forgets to add any of its own locking. Just remove the deprecated LLTX option. Remove the stats lock in the process. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Santiago Leon <santil@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ibmveth: batch rx buffer replacementSantiago Leon2010-09-061-1/+1
| | | | | | | | | | | | | At the moment we try and replenish the receive ring on every rx interrupt. We even have a pool->threshold but aren't using it. To limit the maximum latency incurred when refilling, change the threshold from 1/2 to 7/8 and reduce the largest rx pool from 768 buffers to 512 which should be more than enough. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Santiago Leon <santil@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ibmveth: use consistent typesStephen Rothwell2009-01-061-5/+5
| | | | | | | | | | | | | | | | These variables are only used with an interface that just dumps their values into registers to be passed to the hypervisor. The arguments to that interface are declared to be "unsigned long", so make these variables match. The macros are only used with these variables, so make them match as well. This code is currently only built for 64bit powerpc, so the transformation is really a noop. If the interface was ever ported to 32 bit, it would almost certainly still use registers to pass the parameters and so "unsigned long" would still be appropriate. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* ibmveth: enable driver for CMORobert Jennings2008-07-251-0/+5
| | | | | | | | | | | | | | | | | | | | | | | Enable ibmveth for Cooperative Memory Overcommitment (CMO). For this driver it means calculating a desired amount of IO memory based on the current MTU and updating this value with the bus when MTU changes occur. Because DMA mappings can fail, we have added a bounce buffer for temporary cases where the driver can not map IO memory for the buffer pool. The following changes are made to enable the driver for CMO: * DMA mapping errors will not result in error messages if entitlement has been exceeded and resources were not available. * DMA mapping errors are handled gracefully, ibmveth_replenish_buffer_pool() is corrected to check the return from dma_map_single and fail gracefully. * The driver will have a get_desired_dma function defined to function in a CMO environment. * When the MTU is changed, the driver will update the device IO entitlement Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Santiago Leon <santil@us.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* ibmveth: Remove use of bitfieldsBrian King2007-10-101-33/+23
| | | | | | | | Removes the use of bitfields from the ibmveth driver. This results in slightly smaller object code. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* ibmveth: Remove dead frag processing codeBrian King2007-10-101-5/+0
| | | | | | | | | | Removes dead frag processing code from ibmveth. Since NETIF_F_SG was not set, this code was never executed. Also, since the ibmveth interface can only handle 6 fragments, core networking code would need to be modified in order to efficiently enable this support. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* ibmveth: Implement ethtool hooks to enable/disable checksum offloadBrian King2007-10-101-0/+1
| | | | | | | | This patch adds the appropriate ethtool hooks to allow for enabling/disabling of hypervisor assisted checksum offload for TCP. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* ibmveth: Enable TCP checksum offloadBrian King2007-10-101-2/+39
| | | | | | | | | | | | | | This patchset enables TCP checksum offload support for IPV4 on ibmveth. This completely eliminates the generation and checking of the checksum for packets that are completely virtual and never touch a physical network. A simple TCP_STREAM netperf run on a virtual network with maximum mtu set yielded a ~30% increase in throughput. This feature is enabled by default on systems that support it, but can be disabled with a module option. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> 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 Hemminger2007-10-101-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* ibmveth: Fix rx pool deactivate oopsBrian King2007-08-071-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes the following oops which can occur when trying to deallocate receive buffer pools using sysfs with the ibmveth driver. NIP: d00000000024f954 LR: d00000000024fa58 CTR: c0000000000d7478 REGS: c00000000ffef9f0 TRAP: 0300 Not tainted (2.6.22-ppc64) MSR: 8000000000009032 <EE,ME,IR,DR> CR: 24242442 XER: 00000010 DAR: 00000000000007f0, DSISR: 0000000042000000 TASK = c000000002f91360[2967] 'bash' THREAD: c00000001398c000 CPU: 2 GPR00: 0000000000000000 c00000000ffefc70 d000000000262d30 c00000001c4087a0 GPR04: 00000003000000fe 0000000000000000 000000000000000f c000000000579d80 GPR08: 0000000000365688 c00000001c408998 00000000000007f0 0000000000000000 GPR12: d000000000251e88 c000000000579d80 00000000200957ec 0000000000000000 GPR16: 00000000100b8808 00000000100feb30 0000000000000000 0000000010084828 GPR20: 0000000000000000 000000001014d4d0 0000000000000010 c00000000ffefeb0 GPR24: c00000001c408000 0000000000000000 c00000001c408000 00000000ffffb054 GPR28: 00000000000000fe 0000000000000003 d000000000262700 c00000001c4087a0 NIP [d00000000024f954] .ibmveth_remove_buffer_from_pool+0x38/0x108 [ibmveth] LR [d00000000024fa58] .ibmveth_rxq_harvest_buffer+0x34/0x78 [ibmveth] Call Trace: [c00000000ffefc70] [c0000000000280a8] .dma_iommu_unmap_single+0x14/0x28 (unreliable) [c00000000ffefd00] [d00000000024fa58] .ibmveth_rxq_harvest_buffer+0x34/0x78 [ibmveth] [c00000000ffefd80] [d000000000250e40] .ibmveth_poll+0xd8/0x434 [ibmveth] [c00000000ffefe40] [c00000000032da8c] .net_rx_action+0xdc/0x248 [c00000000ffefef0] [c000000000068b4c] .__do_softirq+0xa8/0x164 [c00000000ffeff90] [c00000000002789c] .call_do_softirq+0x14/0x24 [c00000001398f6f0] [c00000000000c04c] .do_softirq+0x68/0xac [c00000001398f780] [c000000000068ca0] .irq_exit+0x54/0x6c [c00000001398f800] [c00000000000c8e4] .do_IRQ+0x170/0x1ac [c00000001398f890] [c000000000004790] hardware_interrupt_entry+0x18/0x1c Exception: 501 at .plpar_hcall_norets+0x24/0x94 LR = .veth_pool_store+0x15c/0x298 [ibmveth] [c00000001398fb80] [d000000000250b2c] .veth_pool_store+0x5c/0x298 [ibmveth] (unreliable) [c00000001398fc30] [c000000000145530] .sysfs_write_file+0x140/0x1d8 [c00000001398fcf0] [c0000000000de89c] .vfs_write+0x120/0x208 [c00000001398fd90] [c0000000000df2c8] .sys_write+0x4c/0x8c [c00000001398fe30] [c0000000000086ac] syscall_exit+0x0/0x40 Instruction dump: fba1ffe8 fbe1fff8 789d0022 f8010010 f821ff71 789c0020 1d3d00a8 7b8a1f24 38000000 7c7f1b78 7d291a14 e9690128 <7c0a592a> e8030000 e9690120 80a90100 Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] ibmveth: Remove ibmveth "liobn" fieldBenjamin Herrenschmidt2006-12-041-1/+0
| | | | | | | | | Remove the now unused "liobn" field in ibmveth which also avoids having insider knowledge of the iommu table in that driver. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Santiago Leon <santil@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] clean up pseries hcall interfacesAnton Blanchard2006-08-011-2/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | Our pseries hcall interfaces are out of control: plpar_hcall_norets plpar_hcall plpar_hcall_8arg_2ret plpar_hcall_4out plpar_hcall_7arg_7ret plpar_hcall_9arg_9ret Create 3 interfaces to cover all cases: plpar_hcall_norets: 7 arguments no returns plpar_hcall: 6 arguments 4 returns plpar_hcall9: 9 arguments 9 returns There are only 2 cases in the kernel that need plpar_hcall9, hopefully we can keep it that way. Pass in a buffer to stash return parameters so we avoid the &dummy1, &dummy2 madness. Signed-off-by: Anton Blanchard <anton@samba.org> -- Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Instrument Hypervisor Calls: merge headersMike Kravetz2006-07-311-10/+0
| | | | | | | Move all the Hypervisor call definitions to to a single header file. Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [netdrvr ibmlana, ibmveth] trim trailing whitespaceJeff Garzik2006-05-241-2/+2
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* [PATCH] ibmveth change buffer pools dynamicallySantiago Leon2006-05-241-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch provides a sysfs interface to change some properties of the ibmveth buffer pools (size of the buffers, number of buffers per pool, and whether a pool is active). Ethernet drivers use ethtool to provide this type of functionality. However, the buffers in the ibmveth driver can have an arbitrary size (not only regular, mini, and jumbo which are the only sizes that ethtool can change), and also ibmveth can have an arbitrary number of buffer pools Under heavy load we have seen dropped packets which obviously kills TCP performance. We have created several fixes that mitigate this issue, but we definitely need a way of changing the number of buffers for an adapter dynamically. Also, changing the size of the buffers allows users to change the MTU to something big (bigger than a jumbo frame) greatly improving performance on partition to partition transfers. The patch creates directories pool1...pool4 in the device directory in sysfs, each with files: num, size, and active (which default to the values in the mainline version). Comments and suggestions are welcome... -- Santiago A. Leon Power Linux Development IBM Linux Technology Center Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] ibmveth lockless TXSantiago Leon2005-10-281-0/+1
| | | | | | | | | This patch adds the lockless TX feature to the ibmveth driver. The hypervisor has its own locking so the only change that is necessary is to protect the statistics counters. Signed-off-by: Santiago Leon <santil@us.ibm.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
* [PATCH] ibmveth fix buffer replenishingSantiago Leon2005-10-281-4/+0
| | | | | | | | | | | | | | | | | | | | | This patch removes the allocation of RX skb's buffers from a workqueue to be called directly at RX processing time. This change was suggested by Dave Miller when the driver was starving the RX buffers and deadlocking under heavy traffic: > Allocating RX SKBs via tasklet is, IMHO, the worst way to > do it. It is no surprise that there are starvation cases. > > If tasklets or work queues get delayed in any way, you lose, > and it's very easy for a card to catch up with the driver RX'ing > packets very fast, no matter how aggressive you make the > replenishing. By the time you detect that you need to be > "more aggressive" it is already too late. > The only pseudo-reliable way is to allocate at RX processing time. > Signed-off-by: Santiago Leon <santil@us.ibm.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
* [PATCH] ibmveth fix buffer pool managementSantiago Leon2005-10-281-7/+11
| | | | | | | | | | | | | This patch changes the way the ibmveth driver handles the receive buffers. The old code mallocs and maps all the buffers in the pools regardless of MTU size and it also limits the number of buffer pools to three. This patch makes the driver malloc and map the buffers necessary to support the current MTU. It also changes the hardcoded names of the buffer pool number, size, and elements to arrays to make it easier to change (with the hope of making them runtime parameters in the future). Signed-off-by: Santiago Leon <santil@us.ibm.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-161-0/+158
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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