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RDMA/counter: Add an is_disabled field in struct rdma_hw_stats

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Add a bitmap in rdma_hw_stat structure, with each bit indicates whether
the corresponding counter is currently disabled or not. By default
hwcounters are enabled.

Link: https://lore.kernel.org/r/20211008122439.166063-6-markzhang@nvidia.com
Signed-off-by: Aharon Landau <aharonl@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Aharon Landau 2021-10-08 15:24:31 +03:00 committed by Jason Gunthorpe
parent 0a0800ce2a
commit 0dc8968460
3 changed files with 26 additions and 1 deletions
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11
drivers/infiniband/core/nldev.c
View File

@ -968,15 +968,21 @@ static int fill_stat_counter_hwcounters(struct sk_buff *msg,
if (!table_attr)
return -EMSGSIZE;
for (i = 0; i < st->num_counters; i++)
mutex_lock(&st->lock);
for (i = 0; i < st->num_counters; i++) {
if (test_bit(i, st->is_disabled))
continue;
if (rdma_nl_stat_hwcounter_entry(msg, st->descs[i].name,
st->value[i]))
goto err;
}
mutex_unlock(&st->lock);
nla_nest_end(msg, table_attr);
return 0;
err:
mutex_unlock(&st->lock);
nla_nest_cancel(msg, table_attr);
return -EMSGSIZE;
}
@ -2104,6 +2110,9 @@ static int stat_get_doit_default_counter(struct sk_buff *skb,
goto err_stats;
}
for (i = 0; i < num_cnts; i++) {
if (test_bit(i, stats->is_disabled))
continue;
v = stats->value[i] +
rdma_counter_get_hwstat_value(device, port, i);
if (rdma_nl_stat_hwcounter_entry(msg,

13
drivers/infiniband/core/verbs.c
View File

@ -2994,11 +2994,20 @@ struct rdma_hw_stats *rdma_alloc_hw_stats_struct(
if (!stats)
return NULL;
stats->is_disabled = kcalloc(BITS_TO_LONGS(num_counters),
sizeof(*stats->is_disabled), GFP_KERNEL);
if (!stats->is_disabled)
goto err;
stats->descs = descs;
stats->num_counters = num_counters;
stats->lifespan = msecs_to_jiffies(lifespan);
return stats;
err:
kfree(stats);
return NULL;
}
EXPORT_SYMBOL(rdma_alloc_hw_stats_struct);
@ -3008,6 +3017,10 @@ EXPORT_SYMBOL(rdma_alloc_hw_stats_struct);
*/
void rdma_free_hw_stats_struct(struct rdma_hw_stats *stats)
{
if (!stats)
return;
kfree(stats->is_disabled);
kfree(stats);
}
EXPORT_SYMBOL(rdma_free_hw_stats_struct);

3
include/rdma/ib_verbs.h
View File

@ -565,6 +565,8 @@ struct rdma_stat_desc {
* their own value during their allocation routine.
* @descs - Array of pointers to static descriptors used for the counters
* in directory.
* @is_disabled - A bitmap to indicate each counter is currently disabled
* or not.
* @num_counters - How many hardware counters there are. If name is
* shorter than this number, a kernel oops will result. Driver authors
* are encouraged to leave BUILD_BUG_ON(ARRAY_SIZE(@name) < num_counters)
@ -577,6 +579,7 @@ struct rdma_hw_stats {
unsigned long timestamp;
unsigned long lifespan;
const struct rdma_stat_desc *descs;
unsigned long *is_disabled;
int num_counters;
u64 value[];
};