From ec9336e3e7dc3f048f2c4d42e1b9851ea3211c35 Mon Sep 17 00:00:00 2001 From: Or Gerlitz Date: Thu, 17 Jan 2013 05:30:43 +0000 Subject: [PATCH] net/mlx4_core: Set number of msix vectors under SRIOV mode to firmware defaults [ Upstream commit ca4c7b35f75492de7fbf5ee95be07481c348caee ] The lines if (mlx4_is_mfunc(dev)) { nreq = 2; } else { which hard code the number of requested msi-x vectors under multi-function mode to two can be removed completely, since the firmware sets num_eqs and reserved_eqs appropriately Thus, the code line: nreq = min_t(int, dev->caps.num_eqs - dev->caps.reserved_eqs, nreq); is by itself sufficient and correct for all cases. Currently, for mfunc mode num_eqs = 32 and reserved_eqs = 28, hence four vectors will be enabled. This triples (one vector is used for the async events and commands EQ) the horse power provided for processing of incoming packets on netdev RSS scheme, IO initiators/targets commands processing flows, etc. Reviewed-by: Jack Morgenstein Signed-off-by: Amir Vadai Signed-off-by: Or Gerlitz Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/mellanox/mlx4/main.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c index 2aa80afd98d20..d4b3935481ba2 100644 --- a/drivers/net/ethernet/mellanox/mlx4/main.c +++ b/drivers/net/ethernet/mellanox/mlx4/main.c @@ -1702,15 +1702,8 @@ static void mlx4_enable_msi_x(struct mlx4_dev *dev) int i; if (msi_x) { - /* In multifunction mode each function gets 2 msi-X vectors - * one for data path completions anf the other for asynch events - * or command completions */ - if (mlx4_is_mfunc(dev)) { - nreq = 2; - } else { - nreq = min_t(int, dev->caps.num_eqs - - dev->caps.reserved_eqs, nreq); - } + nreq = min_t(int, dev->caps.num_eqs - dev->caps.reserved_eqs, + nreq); entries = kcalloc(nreq, sizeof *entries, GFP_KERNEL); if (!entries) -- 2.47.2