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| author | Andrew Dodd <atd7@cornell.edu> | 2013-02-16 18:41:04 -0500 |
|---|---|---|
| committer | Andrew Dodd <atd7@cornell.edu> | 2013-02-27 09:19:08 -0500 |
| commit | b08797f2afdfc604c3143f8725d058aeef8ddcb2 (patch) | |
| tree | c59e963bd6931d4e9f9526034ab402cc551f18ae /drivers/net/sfc/tx.c | |
| parent | cbfae70f1dcaf3cc6e93061179dad80caa1597fe (diff) | |
| parent | 54ea5b40f067cf098cac639973c6628c6944cfb2 (diff) | |
| download | kernel_samsung_smdk4412-b08797f2afdfc604c3143f8725d058aeef8ddcb2.zip kernel_samsung_smdk4412-b08797f2afdfc604c3143f8725d058aeef8ddcb2.tar.gz kernel_samsung_smdk4412-b08797f2afdfc604c3143f8725d058aeef8ddcb2.tar.bz2 | |
Merge remote-tracking branch 'kernelorg/linux-3.0.y' into 3_0_64
Conflicts:
arch/arm/Kconfig
arch/arm/include/asm/hwcap.h
arch/arm/kernel/smp.c
arch/arm/plat-samsung/adc.c
drivers/gpu/drm/i915/i915_reg.h
drivers/gpu/drm/i915/intel_drv.h
drivers/mmc/core/sd.c
drivers/net/tun.c
drivers/net/usb/usbnet.c
drivers/regulator/max8997.c
drivers/usb/core/hub.c
drivers/usb/host/xhci.h
drivers/usb/serial/qcserial.c
fs/jbd2/transaction.c
include/linux/migrate.h
kernel/sys.c
kernel/time/timekeeping.c
lib/genalloc.c
mm/memory-failure.c
mm/memory_hotplug.c
mm/mempolicy.c
mm/page_alloc.c
mm/vmalloc.c
mm/vmscan.c
mm/vmstat.c
scripts/Kbuild.include
Change-Id: I91e2d85c07320c7ccfc04cf98a448e89bed6ade6
Diffstat (limited to 'drivers/net/sfc/tx.c')
| -rw-r--r-- | drivers/net/sfc/tx.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/net/sfc/tx.c b/drivers/net/sfc/tx.c index 84eb99e..6d3b68a 100644 --- a/drivers/net/sfc/tx.c +++ b/drivers/net/sfc/tx.c @@ -115,6 +115,25 @@ efx_max_tx_len(struct efx_nic *efx, dma_addr_t dma_addr) return len; } +unsigned int efx_tx_max_skb_descs(struct efx_nic *efx) +{ + /* Header and payload descriptor for each output segment, plus + * one for every input fragment boundary within a segment + */ + unsigned int max_descs = EFX_TSO_MAX_SEGS * 2 + MAX_SKB_FRAGS; + + /* Possibly one more per segment for the alignment workaround */ + if (EFX_WORKAROUND_5391(efx)) + max_descs += EFX_TSO_MAX_SEGS; + + /* Possibly more for PCIe page boundaries within input fragments */ + if (PAGE_SIZE > EFX_PAGE_SIZE) + max_descs += max_t(unsigned int, MAX_SKB_FRAGS, + DIV_ROUND_UP(GSO_MAX_SIZE, EFX_PAGE_SIZE)); + + return max_descs; +} + /* * Add a socket buffer to a TX queue * |