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path: root/drivers/net/ethernet/sfc/tx.c
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2012-09-19sfc: Add support for IEEE-1588 PTPStuart Hodgson1-0/+6
Add PTP IEEE-1588 support and make accesible via the PHC subsystem. This work is based on prior code by Andrew Jackson Signed-off-by: Stuart Hodgson <smhodgson@solarflare.com> [bwh: - Add byte order conversion in efx_ptp_send_times() - Simplify conversion of PPS event times - Add the built-in vs module check to CONFIG_SFC_PTP dependencies] Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-08-24sfc: Stash header offsets for TSO in struct tso_stateBen Hutchings1-16/+12
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-08-24sfc: Replace tso_state::full_packet_space with ip_base_lenBen Hutchings1-9/+11
We only use tso_state::full_packet_space to calculate the IPv4 tot_len or IPv6 payload_len, not to set tso_state::packet_space. Replace it with an ip_base_len field holding the value of tot_len or payload_len before including the TCP payload, which is much more useful when constructing the new headers. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-08-24sfc: Simplify TSO header buffer allocationBen Hutchings1-210/+105
TSO header buffers contain a control structure immediately followed by the packet headers, and are kept on a free list when not in use. This complicates buffer management and tends to result in cache read misses when we recycle such buffers (particularly if DMA-coherent memory requires caches to be disabled). Replace the free list with a simple mapping by descriptor index. We know that there is always a payload descriptor between any two descriptors with TSO header buffers, so we can allocate only one such buffer for each two descriptors. While we're at it, use a standard error code for allocation failure, not -1. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-08-24sfc: Stop TX queues before they fill upBen Hutchings1-115/+97
We now have a definite upper bound on the number of descriptors per skb; use that to stop the queue when the next packet might not fit. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-08-24sfc: Refactor struct efx_tx_buffer to use a flags fieldBen Hutchings1-42/+36
Add a flags field to struct efx_tx_buffer, replacing the continuation and map_single booleans. Since a single descriptor cannot be both a TSO header and the last descriptor for an skb, unionise efx_tx_buffer::{skb,tsoh} and add flags for validity of these fields. Clear all flags in free buffers (whereas previously the continuation flag would be set). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-08-02sfc: Fix maximum number of TSO segments and minimum TX queue sizeBen Hutchings1-0/+19
Currently an skb requiring TSO may not fit within a minimum-size TX queue. The TX queue selected for the skb may stall and trigger the TX watchdog repeatedly (since the problem skb will be retried after the TX reset). This issue is designated as CVE-2012-3412. Set the maximum number of TSO segments for our devices to 100. This should make no difference to behaviour unless the actual MSS is less than about 700. Increase the minimum TX queue size accordingly to allow for 2 worst-case skbs, so that there will definitely be space to add an skb after we wake a queue. To avoid invalidating existing configurations, change efx_ethtool_set_ringparam() to fix up values that are too small rather than returning -EINVAL. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-07-17sfc: Stop changing header offsets on TXBen Hutchings1-9/+0
There is nothing in the VLAN driver or core VLAN support that invalidates the TCP and IP header offsets. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-07-17sfc: Remove dead write to tso_state::packet_spaceBen Hutchings1-1/+0
tso_state::packet_space is always set in tso_start_packet(); the value set in tso_start() is not used, and is also incorrect. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-07-17sfc: Use generic DMA API, not PCI-DMA APIBen Hutchings1-42/+41
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-02-22sfc: Minor formatting cleanupBen Hutchings1-1/+1
Fix some indentation and line continuations. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-02-13sfc: Replace some literal constants with EFX_PAGE_SIZE/EFX_BUF_SIZEBen Hutchings1-1/+1
The 'page size' for PCIe DMA, i.e. the alignment of boundaries at which DMA must be broken, is 4KB. Name this value as EFX_PAGE_SIZE and use it in efx_max_tx_len(). Redefine EFX_BUF_SIZE as EFX_PAGE_SIZE since its value is also a result of that requirement, and use it in efx_init_special_buffer(). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-01-27sfc: Remove remnants of on-load self-testBen Hutchings1-3/+1
The out-of-tree version of the sfc driver used to run a self-test on each device before registering it. Although this was never included in-tree, some functions have checks for this special case which is not really possible. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-12-04sfc: Use kcalloc instead of kzalloc to allocate arrayThomas Meyer1-1/+1
The advantage of kcalloc is, that will prevent integer overflows which could result from the multiplication of number of elements and size and it is also a bit nicer to read. The semantic patch that makes this change is available in https://lkml.org/lkml/2011/11/25/107 Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-11-30sfc: fix race in efx_enqueue_skb_tso()Eric Dumazet1-2/+2
As soon as skb is pushed to hardware, it can be completed and freed, so we should not dereference skb anymore. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-11-29sfc: Support for byte queue limitsTom Herbert1-6/+21
Changes to sfc to use byte queue limits. Signed-off-by: Tom Herbert <therbert@google.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-10-19net: add skb frag size accessorsEric Dumazet1-4/+4
To ease skb->truesize sanitization, its better to be able to localize all references to skb frags size. Define accessors : skb_frag_size() to fetch frag size, and skb_frag_size_{set|add|sub}() to manipulate it. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-10-06net: use DMA_x_DEVICE and dma_mapping_error with skb_frag_dma_mapIan Campbell1-3/+3
When I converted some drivers from pci_map_page to skb_frag_dma_map I neglected to convert PCI_DMA_xDEVICE into DMA_x_DEVICE and pci_dma_mapping_error into dma_mapping_error. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-09-22sfc: convert to SKB paged frag API.Ian Campbell1-9/+4
Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Cc: Solarflare linux maintainers <linux-net-drivers@solarflare.com> Cc: Steve Hodgson <shodgson@solarflare.com> Cc: Ben Hutchings <bhutchings@solarflare.com> Cc: netdev@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
2011-08-11sfc: Move the Solarflare driversJeff Kirsher1-0/+1212
Moves the Solarflare drivers into drivers/net/ethernet/sfc/ and make the necessary Kconfig and Makefile changes. CC: Steve Hodgson <shodgson@solarflare.com> CC: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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