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path: root/drivers/net/sfc/tx.c
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* sfc: Fix DMA mapping cleanup in case of an error in TSONeil Turton2009-12-23
| | | | | | | | | We need buffer->len to remain valid to work out the correct address to be unmapped. We therefore need to clear buffer->len after the unmap operation. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Update version, copyright dates, authorsBen Hutchings2009-11-29
| | | | | | | | This driver has been mostly rewritten since Michael Brown's initial work, so swap the order of the authors. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Implement TSO for TCP/IPv6Ben Hutchings2009-11-29
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Rename falcon.h to nic.hBen Hutchings2009-11-29
| | | | | | | nic.h is no longer specific to Falcon. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Separate shared NIC code from Falcon-specific and rename accordinglyBen Hutchings2009-11-29
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Combine high-level header filesBen Hutchings2009-11-24
| | | | | | | | | All files that include ethtool.h, rx.h or tx.h are also including efx.h, and there is no good reason to separate out the few declarations they contain. Therefore fold them into efx.h. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Remove redundant efx_xmit() functionBen Hutchings2009-11-24
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Remove unnecessary casts to struct sk_buff *Ben Hutchings2009-11-24
| | | | | | | | At some point these casts were used to remove const qualification, but they are now unneeded. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Move all TX DMA length limiting into tx.cBen Hutchings2009-10-24
| | | | | | | | | | | Replace the duplicated logic in efx_enqueue_skb() and efx_tx_queue_insert() with an inline function, efx_max_tx_len(). Remove the failed attempt at abstracting hardware-specifics and put all the magic numbers in efx_max_tx_len(). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Eliminate indirect lookups of queue size constantsBen Hutchings2009-10-24
| | | | | | | Move size and mask definitions into efx.h; calculate page orders in falcon.c. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netdev: convert bulk of drivers to netdev_tx_tStephen Hemminger2009-09-01
| | | | | | | | | | | | In a couple of cases collapse some extra code like: int retval = NETDEV_TX_OK; ... return retval; into return NETDEV_TX_OK; Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: dont update dev->trans_start in 10GB driversEric Dumazet2009-05-29
| | | | | | | | | | | | | | | | | Followup of commits 9d21493b4beb8f918ba248032fefa393074a5e2b and 08baf561083bc27a953aa087dd8a664bb2b88e8e (net: tx scalability works : trans_start) (net: txq_trans_update() helper) Now that core network takes care of trans_start updates, dont do it in drivers themselves, if possible. Multi queue drivers can avoid one cache miss (on dev->trans_start) in their start_xmit() handler. Exceptions are NETIF_F_LLTX drivers (vxge & tehuti) Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Pad packets to 33 bytes to prevent TX packet parser lockupBen Hutchings2009-03-21
| | | | | | | | | | The packet parser used in the TX data path for locating checksum fields can lose synchronisation with the TX queue manager when handling packets that look like IPv4 but are too short (17-32 bytes). Work around this by padding to 33 bytes. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Don't wake TX queues while they're being flushedBen Hutchings2009-03-04
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Reject packets from the kernel TX queue during a loopback self-testBen Hutchings2009-03-04
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Use CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS where appropriateBen Hutchings2008-09-24
| | | | | | | | | | | For some buffers we use a starting offset of either NET_IP_ALIGN or 0 depending on whether we believe the architecture supports efficient access to unaligned words. There is now a config macro specifying whether this is the case, so check that rather than checking for specific architectures. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* sfc: Remove some unreachable error pathsBen Hutchings2008-09-03
| | | | | | | | Some functions return an error code which is always 0. Change their return types to void and simplify their callers accordingly. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* sfc: Enable TSO for 802.1q VLAN devicesBen Hutchings2008-09-03
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* sfc: Removed forced inlining of long functionsBen Hutchings2008-09-03
| | | | | | | | | gcc will automatically inline static functions with only one caller, and may inline other functions depending on the kernel configuration and size of the intermediate code. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* sfc: Cleaned up struct tso_state fieldsBen Hutchings2008-09-03
| | | | | | | | | | | | Squashed nested structures. Renamed remaining_len to out_len, ifc.len to in_len, header_length to header_len. Moved ipv4_id into the group of output variables where it belongs. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* sfc: Use explicit bool for boolean variables, parameters and return valuesBen Hutchings2008-09-03
| | | | | | | | | | | | Replace (cond ? 1 : 0) with cond or !!cond as appropriate, and (cond ? 0 : 1) with !cond. Remove some redundant boolean temporaries. Rename one field that looks like a flag but isn't. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* sfc: Reduce the size of struct efx_tx_bufferBen Hutchings2008-09-03
| | | | | | | | Remove unmap_addr since it can be calculated from dma_addr, len and unmap_len. This saves 4-16 bytes. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* sfc: Use pci_map_single() to map the skb header when doing TSOBen Hutchings2008-09-03
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* sfc: Don't leak PCI DMA maps in the TSO code when the queue fills upBen Hutchings2008-09-03
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* sfc: Use separate hardware TX queues to select checksum generationBen Hutchings2008-09-03
| | | | | | | | | | | | | | | | Checksum generation is an attribute of our hardware TX queues, not TX descriptors. We previously used a single queue and turned checksum generation on or off as requested through ethtool. However, this can result in regenerating checksums in raw packets that should not be modified. We now create 2 hardware TX queues with checksum generation on or off. They are presented to the net core as one queue since it does not know how to select between them. The self-test verifies that a bad checksum is unaltered on the queue with checksum generation off. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* sfc: Replace net_dev->priv with netdev_priv(net_dev)Ben Hutchings2008-09-03
| | | | | | | Use of the net_device::priv field is deprecated. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* dma-mapping: add the device argument to dma_mapping_error()FUJITA Tomonori2008-07-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add per-device dma_mapping_ops support for CONFIG_X86_64 as POWER architecture does: This enables us to cleanly fix the Calgary IOMMU issue that some devices are not behind the IOMMU (http://lkml.org/lkml/2008/5/8/423). I think that per-device dma_mapping_ops support would be also helpful for KVM people to support PCI passthrough but Andi thinks that this makes it difficult to support the PCI passthrough (see the above thread). So I CC'ed this to KVM camp. Comments are appreciated. A pointer to dma_mapping_ops to struct dev_archdata is added. If the pointer is non NULL, DMA operations in asm/dma-mapping.h use it. If it's NULL, the system-wide dma_ops pointer is used as before. If it's useful for KVM people, I plan to implement a mechanism to register a hook called when a new pci (or dma capable) device is created (it works with hot plugging). It enables IOMMUs to set up an appropriate dma_mapping_ops per device. The major obstacle is that dma_mapping_error doesn't take a pointer to the device unlike other DMA operations. So x86 can't have dma_mapping_ops per device. Note all the POWER IOMMUs use the same dma_mapping_error function so this is not a problem for POWER but x86 IOMMUs use different dma_mapping_error functions. The first patch adds the device argument to dma_mapping_error. The patch is trivial but large since it touches lots of drivers and dma-mapping.h in all the architecture. This patch: dma_mapping_error() doesn't take a pointer to the device unlike other DMA operations. So we can't have dma_mapping_ops per device. Note that POWER already has dma_mapping_ops per device but all the POWER IOMMUs use the same dma_mapping_error function. x86 IOMMUs use device argument. [akpm@linux-foundation.org: fix sge] [akpm@linux-foundation.org: fix svc_rdma] [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix bnx2x] [akpm@linux-foundation.org: fix s2io] [akpm@linux-foundation.org: fix pasemi_mac] [akpm@linux-foundation.org: fix sdhci] [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix sparc] [akpm@linux-foundation.org: fix ibmvscsi] Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Muli Ben-Yehuda <muli@il.ibm.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sfc: Replaced various macros with inline functionsBen Hutchings2008-05-22
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* sfc: Added and removed braces to comply with kernel styleBen Hutchings2008-05-22
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* [netdrvr] sfc: Add TSO supportBen Hutchings2008-05-13
| | | | | | | | | | The SFC4000 controller does not have hardware support for TSO, and the core GSO code incurs a high cost in allocating and freeing skbs. This TSO implementation uses lightweight packet header structures and is substantially faster. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* New driver "sfc" for Solarstorm SFC4000 controller.Ben Hutchings2008-04-29
The driver supports the 10Xpress PHY and XFP modules on our reference designs SFE4001 and SFE4002 and the SMC models SMC10GPCIe-XFP and SMC10GPCIe-10BT. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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