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net/mlx4_core: Add resource alloc/dealloc debugging 

In order to aid debugging of functions that take a resource but
don't put it, add the last function name that successfully grabbed
this resource.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matan Barak 2017-01-29 18:56:15 +02:00 committed by David S. Miller
parent 3835336401
commit ae5a2e29d1
1 changed files with 45 additions and 4 deletions
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49
drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
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@ -77,6 +77,7 @@ struct res_common {
int from_state;
int to_state;
int removing;
const char *func_name;
};
enum {
@ -837,6 +838,36 @@ static int mpt_mask(struct mlx4_dev *dev)
return dev->caps.num_mpts - 1;
}
static const char *mlx4_resource_type_to_str(enum mlx4_resource t)
{
switch (t) {
case RES_QP:
return "QP";
case RES_CQ:
return "CQ";
case RES_SRQ:
return "SRQ";
case RES_XRCD:
return "XRCD";
case RES_MPT:
return "MPT";
case RES_MTT:
return "MTT";
case RES_MAC:
return "MAC";
case RES_VLAN:
return "VLAN";
case RES_COUNTER:
return "COUNTER";
case RES_FS_RULE:
return "FS_RULE";
case RES_EQ:
return "EQ";
default:
return "INVALID RESOURCE";
}
}
static void *find_res(struct mlx4_dev *dev, u64 res_id,
enum mlx4_resource type)
{
@ -846,9 +877,9 @@ static void *find_res(struct mlx4_dev *dev, u64 res_id,
res_id);
}
static int get_res(struct mlx4_dev *dev, int slave, u64 res_id,
enum mlx4_resource type,
void *res)
static int _get_res(struct mlx4_dev *dev, int slave, u64 res_id,
enum mlx4_resource type,
void *res, const char *func_name)
{
struct res_common *r;
int err = 0;
@ -861,6 +892,10 @@ static int get_res(struct mlx4_dev *dev, int slave, u64 res_id,
}
if (r->state == RES_ANY_BUSY) {
mlx4_warn(dev,
"%s(%d) trying to get resource %llx of type %s, but it's already taken by %s\n",
func_name, slave, res_id, mlx4_resource_type_to_str(type),
r->func_name);
err = -EBUSY;
goto exit;
}
@ -872,6 +907,7 @@ static int get_res(struct mlx4_dev *dev, int slave, u64 res_id,
r->from_state = r->state;
r->state = RES_ANY_BUSY;
r->func_name = func_name;
if (res)
*((struct res_common **)res) = r;
@ -881,6 +917,9 @@ exit:
return err;
}
#define get_res(dev, slave, res_id, type, res) \
_get_res((dev), (slave), (res_id), (type), (res), __func__)
int mlx4_get_slave_from_resource_id(struct mlx4_dev *dev,
enum mlx4_resource type,
u64 res_id, int *slave)
@ -911,8 +950,10 @@ static void put_res(struct mlx4_dev *dev, int slave, u64 res_id,
spin_lock_irq(mlx4_tlock(dev));
r = find_res(dev, res_id, type);
if (r)
if (r) {
r->state = r->from_state;
r->func_name = "";
}
spin_unlock_irq(mlx4_tlock(dev));
}