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path: root/src/drivers/net/virtio-net.c
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* [ethernet] Use standard 1500 byte MTU unless explicitly overriddenMichael Brown2018-07-171-0/+1
| | | | | | | | | | | | | Devices that support jumbo frames will currently default to the largest possible MTU. This assumption is valid for virtual adapters such as virtio-net, where the MTU must have been configured by a system administrator, but is unsafe in the general case of a physical adapter. Default to the standard Ethernet MTU, unless explicitly overridden either by the driver or via the ${netX/mtu} setting. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [virtio] Support VIRTIO_NET_F_IOMMU_PLATFORMJason Wang2017-07-101-1/+2
| | | | | | | | | Since we don't enable IOMMU at all, we can then simply enable the IOMMU support by claiming the support of VIRITO_F_IOMMU_PLATFORM. This fixes booting failure when iommu_platform is set from qemu cli. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [virtio] Use host-specified MTU when availableMichael Brown2017-01-231-13/+27
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [virtio] Use separate RX and TX empty header buffersMichael Brown2017-01-231-7/+12
| | | | | | | | | | | | | | | Some host implementations (notably Google Compute Platform) are known to unconditionally write back VIRTIO_NET_HDR_F_DATA_VALID to header->flags for received packets, regardless of the features negotiated by the driver. This breaks the transmit datapath by effectively setting an illegal flag for all subsequent transmitted packets. Work around this problem by using separate empty header buffers for the receive and transmit queues. Debugged-by: Ladi Prosek <lprosek@redhat.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [virtio] Remove queue size limit in legacy virtioLadi Prosek2017-01-221-0/+1
| | | | | | | | | | | | | | | | Virtio 0.9 implementation was limited to the maximum virtqueue size of MAX_QUEUE_NUM and the virtio-net driver would fail to initialize on hosts exceeding this limit. This commit lifts the restriction by allocating the queue memory based on the actual queue size instead of using a fixed maximum. Note that virtio 1.0 still uses the MAX_QUEUE_NUM constant to cap the size (unfortunately this functionality is not available in virtio 0.9). Signed-off-by: Ladi Prosek <lprosek@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [virtio] Simplify virtqueue shutdownLadi Prosek2017-01-221-11/+19
| | | | | | | | | | | | This commit introduces virtnet_free_virtqueues called on all virtqueue error and shutdown paths. vpm_find_vqs no longer cleans up after itself and instead expects virtnet_free_virtqueues to be always called to undo its effect. Signed-off-by: Ladi Prosek <lprosek@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [virtio] Add virtio-net 1.0 supportLadi Prosek2016-04-151-11/+251
| | | | | | | | | | | | | | This commit makes virtio-net support devices with VEN 0x1af4 and DEV 0x1041, which is how non-transitional (modern-only) virtio-net devices are exposed on the PCI bus. Transitional devices supporting both the old 0.9.5 and new 1.0 version of the virtio spec are driven using the new protocol. Legacy devices are driven using the old protocol, same as before this commit. Signed-off-by: Ladi Prosek <lprosek@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [virtio] Add virtio 1.0 PCI supportLadi Prosek2016-04-151-2/+3
| | | | | | | | | | | | This commit adds support for driving virtio 1.0 PCI devices. In addition to various helpers, a number of vpm_ functions are introduced to be used instead of their legacy vp_ counterparts when accessing virtio 1.0 (aka modern) devices. Signed-off-by: Ladi Prosek <lprosek@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Modified-by: Michael Brown <mcb30@ipxe.org> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [virtio] Downgrade per-iobuf debug messages to DBGC2Laszlo Ersek2015-04-101-6/+6
| | | | | Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [legal] Relicense files under GPL2_OR_LATER_OR_UBDLMichael Brown2015-03-051-1/+1
| | | | | | | | | | | Relicense files with kind permission from Stefan Hajnoczi <stefanha@redhat.com> alongside the contributors who have already granted such relicensing permission. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [src] Fix spelling in comments, debug messages and local variable namesStefan Weil2013-01-031-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes in comments and debug messages: existance -> existence unecessary -> unnecessary occured -> occurred decriptor -> descriptor neccessary -> necessary addres, adress -> address initilize -> initialize sucessfully -> successfully paramter -> parameter acess -> access upto -> up to likelyhood ->likelihood thru -> through substracting -> subtracting lenght -> length isnt -> isn't interupt -> interrupt publically -> publicly (this one was not wrong, but unusual) recieve -> receive accessable -> accessible seperately -> separately pacet -> packet controled -> controlled dectect -> detect indicies -> indices extremly -> extremely boundry -> boundary usefull -> useful unuseable -> unusable auxilliary -> auxiliary embeded -> embedded enviroment -> environment sturcture -> structure complier -> compiler constructes -> constructs supress -> suppress intruduced -> introduced compatability -> compatibility verfication -> verification ths -> the reponse -> response Fixes in local variable names: retreive -> retrieve Most of these fixes were made using codespell. Signed-off-by: Stefan Weil <sw@weilnetz.de> Modified-by: Michael Brown <mcb30@ipxe.org> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [pci] Make driver PCI ID a property of the PCI deviceMichael Brown2011-02-171-2/+1Star
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [netdevice] Call netdev_link_[up|down|err]() only while registeredMichael Brown2010-09-051-5/+11
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [virtio] Replace virtio-net with native iPXE driverStefan Hajnoczi2010-07-171-228/+335
| | | | | | | | | | | | | | | | | | | | | | This patch adds a native iPXE virtio-net driver and removes the legacy Etherboot virtio-net driver. The main reasons for doing this are: 1. Multiple virtio-net NICs are now supported by iPXE. The legacy driver kept global state and caused issues in virtual machines with more than one virtio-net device. 2. Faster downloads. The native iPXE driver downloads 100 MB over HTTP in 12s, the legacy Etherboot driver in 37s. This simple benchmark uses KVM with tap networking and the Python SimpleHTTPServer both running on the same host. Changes to core virtio code reduce vring descriptors to 256 (QEMU uses 128 for virtio-blk and 256 for virtio-net) and change the opaque token from u16 to void*. Lowering the descriptor count reduces memory consumption. The void* opaque token change makes driver code simpler. Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [build] Rename gPXE to iPXEMichael Brown2010-04-201-2/+2
| | | | | | | | | | | Access to the gpxe.org and etherboot.org domains and associated resources has been revoked by the registrant of the domain. Work around this problem by renaming project from gPXE to iPXE, and updating URLs to match. Also update README, LOG and COPYRIGHTS to remove obsolete information. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [pci] Add driver_data field to struct pci_device_idThomas Miletich2009-03-261-1/+1
| | | | | Modified-by: Michael Brown <mcb30@etherboot.org> Signed-off-by: Michael Brown <mcb30@etherboot.org>
* [virtio] Split virtio-net.c into several files.Laurent Vivier2008-11-191-202/+3Star
| | | | Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net>
* [virtio] Consolidate virtio-net static data into a struct vring_virtqueueLaurent Vivier2008-11-191-55/+64
| | | | Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net>
* [virtio] Remove dependency on nic for virtio PCI functionsLaurent Vivier2008-11-191-14/+14
| | | | Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net>
* [virtio] Consolidate vring_get_buf() by using a buffer list to add to the vringLaurent Vivier2008-11-191-41/+44
| | | | Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net>
* [virtio] Move virtio-pci.h and virtio-ring.h to include/gpxeLaurent Vivier2008-11-191-2/+2
| | | | Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net>
* virtio-net: Fix kick/wait logicEduardo Habkost2008-10-161-3/+5
| | | | | | | | | | | | | | | | | | | | | | The virtnet_transmit() logic for waiting the packet to be transmitted is reversed: we can't wait the packet to be transmitted if we didn't kick() the ring yet. The vring_more_used() while loop logic is reversed also, that explains why the code works today. The current code risks trying to free a buffer from the used ring when none was available, that will happen most times because KVM doesn't handle the packet immediately on kick(). Luckily it was working because it was unlikely to have a buffer still queued for transmit when virtnet_transmit() was called. Also, adds a BUG_ON() to vring_get_buf(), to catch cases where we try to free a buffer from the used ring when there was none available. Patch for Etherboot. gPXE has the same problem on the code, but I hadn't a chance to test gPXE using virtio-net yet. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
* [virtio] Add legacy driver for KVM virtio-netStefan Hajnoczi2008-08-011-0/+492
This patch adds support for the virtio-net adapter provided by KVM. Written by Laurent Vivier <Laurent.Vivier@bull.net> for Etherboot. Wrapped as legacy driver for gPXE by Stefan Hajnoczi <stefanha@gmail.com>.
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