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net/mlx4_core: Adjust counter grant policy in the resource tracker

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Each physical function has a guarantee of two counters per port, one
for a default counter and one for the IB driver.

Each virtual function has a guarantee of one counter per port.
All other counters are free and can be obtained on demand.

This is a preparation step for supporting a get_vf_stats ndo call,
so we can promise a counter for every VF in order to collect their
statistics from the PF context.

Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eran Ben Elisha 2015-06-15 17:59:00 +03:00 committed by David S. Miller
parent 2632d18d3a
commit 9de92c60be
1 changed files with 31 additions and 4 deletions
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35
drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
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@ -48,6 +48,8 @@
#include "fw.h"
#define MLX4_MAC_VALID (1ull << 63)
#define MLX4_PF_COUNTERS_PER_PORT 2
#define MLX4_VF_COUNTERS_PER_PORT 1
struct mac_res {
struct list_head list;
@ -459,11 +461,21 @@ void mlx4_init_quotas(struct mlx4_dev *dev)
dev->quotas.mpt =
priv->mfunc.master.res_tracker.res_alloc[RES_MPT].quota[pf];
}
static int get_max_gauranteed_vfs_counter(struct mlx4_dev *dev)
{
/* reduce the sink counter */
return (dev->caps.max_counters - 1 -
(MLX4_PF_COUNTERS_PER_PORT * MLX4_MAX_PORTS))
/ MLX4_MAX_PORTS;
}
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 =
kzalloc(dev->num_slaves * sizeof(struct slave_list),
@ -499,6 +511,9 @@ int mlx4_init_resource_tracker(struct mlx4_dev *dev)
res_alloc->allocated = kzalloc((dev->persist->
num_vfs + 1) *
sizeof(int), GFP_KERNEL);
/* Reduce the sink counter */
if (i == RES_COUNTER)
res_alloc->res_free = dev->caps.max_counters - 1;
if (!res_alloc->quota || !res_alloc->guaranteed ||
!res_alloc->allocated)
@ -577,9 +592,17 @@ int mlx4_init_resource_tracker(struct mlx4_dev *dev)
break;
case RES_COUNTER:
res_alloc->quota[t] = dev->caps.max_counters;
res_alloc->guaranteed[t] = 0;
if (t == mlx4_master_func_num(dev))
res_alloc->res_free = res_alloc->quota[t];
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->res_free -= res_alloc->guaranteed[t];
break;
default:
break;
@ -952,7 +975,7 @@ static struct res_common *alloc_srq_tr(int id)
return &ret->com;
}
static struct res_common *alloc_counter_tr(int id)
static struct res_common *alloc_counter_tr(int id, int port)
{
struct res_counter *ret;
@ -962,6 +985,7 @@ static struct res_common *alloc_counter_tr(int id)
ret->com.res_id = id;
ret->com.state = RES_COUNTER_ALLOCATED;
ret->port = port;
return &ret->com;
}
@ -1022,7 +1046,7 @@ static struct res_common *alloc_tr(u64 id, enum mlx4_resource type, int slave,
pr_err("implementation missing\n");
return NULL;
case RES_COUNTER:
ret = alloc_counter_tr(id);
ret = alloc_counter_tr(id, extra);
break;
case RES_XRCD:
ret = alloc_xrcdn_tr(id);
@ -2335,6 +2359,9 @@ static int counter_free_res(struct mlx4_dev *dev, int slave, int op, int cmd,
return -EINVAL;
index = get_param_l(&in_param);
if (index == MLX4_SINK_COUNTER_INDEX(dev))
return 0;
err = rem_res_range(dev, slave, index, 1, RES_COUNTER, 0);
if (err)
return err;