From e19868efea0c103f23b4b7e986fd0a703822111f Mon Sep 17 00:00:00 2001 From: Eran Ben Elisha Date: Sun, 27 Oct 2019 16:39:15 +0200 Subject: [PATCH] net/mlx4_core: Dynamically set guaranteed amount of counters per VF Prior to this patch, the amount of counters guaranteed per VF in the resource tracker was MLX4_VF_COUNTERS_PER_PORT * MLX4_MAX_PORTS. It was set regardless if the VF was single or dual port. This caused several VFs to have no guaranteed counters although the system could satisfy their request. The fix is to dynamically guarantee counters, based on each VF specification. Fixes: 9de92c60beaa ("net/mlx4_core: Adjust counter grant policy in the resource tracker") Signed-off-by: Eran Ben Elisha Signed-off-by: Jack Morgenstein Signed-off-by: Tariq Toukan Signed-off-by: David S. Miller --- .../ethernet/mellanox/mlx4/resource_tracker.c | 42 ++++++++++++------- 1 file changed, 26 insertions(+), 16 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c index 4356f3a58002..1187ef1375e2 100644 --- a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c +++ b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c @@ -471,12 +471,31 @@ void mlx4_init_quotas(struct mlx4_dev *dev) priv->mfunc.master.res_tracker.res_alloc[RES_MPT].quota[pf]; } -static int get_max_gauranteed_vfs_counter(struct mlx4_dev *dev) +static int +mlx4_calc_res_counter_guaranteed(struct mlx4_dev *dev, + struct resource_allocator *res_alloc, + int vf) { - /* reduce the sink counter */ - return (dev->caps.max_counters - 1 - - (MLX4_PF_COUNTERS_PER_PORT * MLX4_MAX_PORTS)) - / MLX4_MAX_PORTS; + struct mlx4_active_ports actv_ports; + int ports, counters_guaranteed; + + /* For master, only allocate according to the number of phys ports */ + if (vf == mlx4_master_func_num(dev)) + return MLX4_PF_COUNTERS_PER_PORT * dev->caps.num_ports; + + /* calculate real number of ports for the VF */ + actv_ports = mlx4_get_active_ports(dev, vf); + ports = bitmap_weight(actv_ports.ports, dev->caps.num_ports); + counters_guaranteed = ports * MLX4_VF_COUNTERS_PER_PORT; + + /* If we do not have enough counters for this VF, do not + * allocate any for it. '-1' to reduce the sink counter. + */ + if ((res_alloc->res_reserved + counters_guaranteed) > + (dev->caps.max_counters - 1)) + return 0; + + return counters_guaranteed; } int mlx4_init_resource_tracker(struct mlx4_dev *dev) @@ -484,7 +503,6 @@ int mlx4_init_resource_tracker(struct mlx4_dev *dev) struct mlx4_priv *priv = mlx4_priv(dev); int i, j; int t; - int max_vfs_guarantee_counter = get_max_gauranteed_vfs_counter(dev); priv->mfunc.master.res_tracker.slave_list = kcalloc(dev->num_slaves, sizeof(struct slave_list), @@ -603,16 +621,8 @@ int mlx4_init_resource_tracker(struct mlx4_dev *dev) break; case RES_COUNTER: res_alloc->quota[t] = dev->caps.max_counters; - if (t == mlx4_master_func_num(dev)) - res_alloc->guaranteed[t] = - MLX4_PF_COUNTERS_PER_PORT * - MLX4_MAX_PORTS; - else if (t <= max_vfs_guarantee_counter) - res_alloc->guaranteed[t] = - MLX4_VF_COUNTERS_PER_PORT * - MLX4_MAX_PORTS; - else - res_alloc->guaranteed[t] = 0; + res_alloc->guaranteed[t] = + mlx4_calc_res_counter_guaranteed(dev, res_alloc, t); break; default: break; -- 2.30.2