On Wed, 2015-08-19 at 15:59 +0300, Emmanuel Grumbach wrote: > The segmentation is done completely in software. The > driver creates several MPDUs out of a single large send. > Each MPDU is a newly allocated SKB. > A page is allocated to create the headers that need to be > duplicated (SNAP / IP / TCP). The WiFi header is in the > header of the newly created SKBs. > > type=feature > > Change-Id: I238ffa79cacc5bbdacdfbf3e9673c8d4f02b462a > Signed-off-by: Emmanuel Grumbach <emmanuel.grumb...@intel.com> > --- > drivers/net/wireless/iwlwifi/mvm/tx.c | 513 > +++++++++++++++++++++++++++++++--- > 1 file changed, 481 insertions(+), 32 deletions(-)
Ouch dynamic allocations while doing xmit are certainly not needed. Your driver should pre-allocated space for headers. Drivers willing to implement tso have to use net/core/tso.c provided helpers. $ git grep -n tso_build_hdr drivers/net/ethernet/cavium/thunder/nicvf_queues.c:1030: tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0); drivers/net/ethernet/freescale/fec_main.c:729: tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0); drivers/net/ethernet/marvell/mv643xx_eth.c:842: tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0); drivers/net/ethernet/marvell/mvneta.c:1650: tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0); include/net/tso.h:15:void tso_build_hdr(struct sk_buff *skb, char *hdr, struct tso_t *tso, net/core/tso.c:14:void tso_build_hdr(struct sk_buff *skb, char *hdr, struct tso_t *tso, net/core/tso.c:37:EXPORT_SYMBOL(tso_build_hdr); -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
