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mlxsw: spectrum: acl: Push code related to num_ctcam_erps inc/dec into separate helpers

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Later on the same code is going to be needed for deltas as well. So push
the procedures related to increment and decrement of num_ctcam_erps
into a separate helpers.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2018-11-14 08:22:34 +00:00 committed by David S. Miller
parent 59600844cf
commit c293ba3403
1 changed files with 60 additions and 50 deletions
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110
drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_erp.c
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@ -623,9 +623,50 @@ mlxsw_sp_acl_erp_region_ctcam_disable(struct mlxsw_sp_acl_erp_table *erp_table)
mlxsw_sp_acl_erp_table_enable(erp_table, false);
}
static void
mlxsw_sp_acl_erp_ctcam_table_ops_set(struct mlxsw_sp_acl_erp_table *erp_table)
static int
__mlxsw_sp_acl_erp_table_other_inc(struct mlxsw_sp_acl_erp_table *erp_table,
unsigned int *inc_num)
{
int err;
/* If there are C-TCAM eRPs in use we need to transition
* the region to use eRP table, if it is not already done
*/
if (erp_table->ops != &erp_two_masks_ops &&
erp_table->ops != &erp_multiple_masks_ops) {
err = mlxsw_sp_acl_erp_region_table_trans(erp_table);
if (err)
return err;
}
/* When C-TCAM is used, the eRP table must be used */
if (erp_table->ops != &erp_multiple_masks_ops)
erp_table->ops = &erp_multiple_masks_ops;
(*inc_num)++;
return 0;
}
static int mlxsw_sp_acl_erp_ctcam_inc(struct mlxsw_sp_acl_erp_table *erp_table)
{
return __mlxsw_sp_acl_erp_table_other_inc(erp_table,
&erp_table->num_ctcam_erps);
}
static void
__mlxsw_sp_acl_erp_table_other_dec(struct mlxsw_sp_acl_erp_table *erp_table,
unsigned int *dec_num)
{
(*dec_num)--;
/* If there are no C-TCAM eRPs in use, the state we
* transition to depends on the number of A-TCAM eRPs currently
* in use.
*/
if (erp_table->num_ctcam_erps > 0)
return;
switch (erp_table->num_atcam_erps) {
case 2:
/* Keep using the eRP table, but correctly set the
@ -659,9 +700,15 @@ mlxsw_sp_acl_erp_ctcam_table_ops_set(struct mlxsw_sp_acl_erp_table *erp_table)
}
}
static void mlxsw_sp_acl_erp_ctcam_dec(struct mlxsw_sp_acl_erp_table *erp_table)
{
__mlxsw_sp_acl_erp_table_other_dec(erp_table,
&erp_table->num_ctcam_erps);
}
static struct mlxsw_sp_acl_erp *
__mlxsw_sp_acl_erp_ctcam_mask_create(struct mlxsw_sp_acl_erp_table *erp_table,
struct mlxsw_sp_acl_erp_key *key)
mlxsw_sp_acl_erp_ctcam_mask_create(struct mlxsw_sp_acl_erp_table *erp_table,
struct mlxsw_sp_acl_erp_key *key)
{
struct mlxsw_sp_acl_erp *erp;
int err;
@ -673,7 +720,11 @@ __mlxsw_sp_acl_erp_ctcam_mask_create(struct mlxsw_sp_acl_erp_table *erp_table,
memcpy(&erp->key, key, sizeof(*key));
bitmap_from_arr32(erp->mask_bitmap, (u32 *) key->mask,
MLXSW_SP_ACL_TCAM_MASK_LEN);
erp_table->num_ctcam_erps++;
err = mlxsw_sp_acl_erp_ctcam_inc(erp_table);
if (err)
goto err_erp_ctcam_inc;
erp->erp_table = erp_table;
err = mlxsw_sp_acl_erp_master_mask_set(erp_table, &erp->key);
@ -684,50 +735,17 @@ __mlxsw_sp_acl_erp_ctcam_mask_create(struct mlxsw_sp_acl_erp_table *erp_table,
if (err)
goto err_erp_region_ctcam_enable;
/* When C-TCAM is used, the eRP table must be used */
erp_table->ops = &erp_multiple_masks_ops;
return erp;
err_erp_region_ctcam_enable:
mlxsw_sp_acl_erp_master_mask_clear(erp_table, &erp->key);
err_master_mask_set:
erp_table->num_ctcam_erps--;
mlxsw_sp_acl_erp_ctcam_dec(erp_table);
err_erp_ctcam_inc:
kfree(erp);
return ERR_PTR(err);
}
static struct mlxsw_sp_acl_erp *
mlxsw_sp_acl_erp_ctcam_mask_create(struct mlxsw_sp_acl_erp_table *erp_table,
struct mlxsw_sp_acl_erp_key *key)
{
struct mlxsw_sp_acl_erp *erp;
int err;
/* There is a special situation where we need to spill rules
* into the C-TCAM, yet the region is still using a master
* mask and thus not performing a lookup in the C-TCAM. This
* can happen when two rules that only differ in priority - and
* thus sharing the same key - are programmed. In this case
* we transition the region to use an eRP table
*/
err = mlxsw_sp_acl_erp_region_table_trans(erp_table);
if (err)
return ERR_PTR(err);
erp = __mlxsw_sp_acl_erp_ctcam_mask_create(erp_table, key);
if (IS_ERR(erp)) {
err = PTR_ERR(erp);
goto err_erp_create;
}
return erp;
err_erp_create:
mlxsw_sp_acl_erp_region_master_mask_trans(erp_table);
return ERR_PTR(err);
}
static void
mlxsw_sp_acl_erp_ctcam_mask_destroy(struct mlxsw_sp_acl_erp *erp)
{
@ -735,16 +753,8 @@ mlxsw_sp_acl_erp_ctcam_mask_destroy(struct mlxsw_sp_acl_erp *erp)
mlxsw_sp_acl_erp_region_ctcam_disable(erp_table);
mlxsw_sp_acl_erp_master_mask_clear(erp_table, &erp->key);
erp_table->num_ctcam_erps--;
mlxsw_sp_acl_erp_ctcam_dec(erp_table);
kfree(erp);
/* Once the last C-TCAM eRP was destroyed, the state we
* transition to depends on the number of A-TCAM eRPs currently
* in use
*/
if (erp_table->num_ctcam_erps > 0)
return;
mlxsw_sp_acl_erp_ctcam_table_ops_set(erp_table);
}
static struct mlxsw_sp_acl_erp *
@ -755,7 +765,7 @@ mlxsw_sp_acl_erp_mask_create(struct mlxsw_sp_acl_erp_table *erp_table,
int err;
if (key->ctcam)
return __mlxsw_sp_acl_erp_ctcam_mask_create(erp_table, key);
return mlxsw_sp_acl_erp_ctcam_mask_create(erp_table, key);
/* Expand the eRP table for the new eRP, if needed */
err = mlxsw_sp_acl_erp_table_expand(erp_table);