From: Vipul Pandya Date: Fri, 18 May 2012 09:59:26 +0000 (+0530) Subject: cxgb4: DB Drop Recovery for RDMA and LLD queues X-Git-Tag: v3.5-rc1~171^2^2~8 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3069ee9bc451d90a2fa8c3c7ef2774744d9d3bb0;p=pandora-kernel.git cxgb4: DB Drop Recovery for RDMA and LLD queues recover LLD EQs for DB drop interrupts. This includes adding a new db_lock, a spin lock disabling BH too, used by the recovery thread and the ring_tx_db() paths to allow db drop recovery. Clean up initial DB avoidance code. Add read_eq_indices() - this allows the LLD to use the PCIe mw to efficiently read hw eq contexts. Add cxgb4_sync_txq_pidx() - called by iw_cxgb4 to sync up the sw/hw pidx value. Add flush_eq_cache() and cxgb4_flush_eq_cache(). This allows iw_cxgb4 to flush the sge eq context cache before beginning db drop recovery. Add module parameter, dbfoifo_int_thresh, to allow tuning the db interrupt threshold value. Add dbfifo_int_thresh to cxgb4_lld_info so iw_cxgb4 knows the threshold. Add module parameter, dbfoifo_drain_delay, to allow tuning the amount of time delay between DB FULL and EMPTY upcalls to iw_cxgb4. Signed-off-by: Vipul Pandya Signed-off-by: Steve Wise Signed-off-by: Roland Dreier --- Reading git-diff-tree failed