u32 priority,
const char *tcam_region_info,
const char *key, u8 erp_id,
- bool large_exists, u32 lkey_id,
- u32 action_pointer)
+ u16 delta_start, u8 delta_mask,
+ u8 delta_value, bool large_exists,
+ u32 lkey_id, u32 action_pointer)
{
MLXSW_REG_ZERO(ptce3, payload);
mlxsw_reg_ptce3_v_set(payload, valid);
mlxsw_reg_ptce3_tcam_region_info_memcpy_to(payload, tcam_region_info);
mlxsw_reg_ptce3_flex2_key_blocks_memcpy_to(payload, key);
mlxsw_reg_ptce3_erp_id_set(payload, erp_id);
+ mlxsw_reg_ptce3_delta_start_set(payload, delta_start);
+ mlxsw_reg_ptce3_delta_mask_set(payload, delta_mask);
+ mlxsw_reg_ptce3_delta_value_set(payload, delta_value);
mlxsw_reg_ptce3_large_exists_set(payload, large_exists);
mlxsw_reg_ptce3_large_entry_key_id_set(payload, lkey_id);
mlxsw_reg_ptce3_action_pointer_set(payload, action_pointer);
mlxsw_reg_ptce3_pack(ptce3_pl, true, MLXSW_REG_PTCE3_OP_WRITE_WRITE,
priority, region->tcam_region_info,
aentry->ht_key.enc_key, erp_id,
+ aentry->delta_info.start,
+ aentry->delta_info.mask,
+ aentry->delta_info.value,
refcount_read(&lkey_id->refcnt) != 1, lkey_id->id,
kvdl_index);
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptce3), ptce3_pl);
struct mlxsw_sp_acl_atcam_lkey_id *lkey_id = aentry->lkey_id;
struct mlxsw_sp_acl_tcam_region *region = aregion->region;
u8 erp_id = mlxsw_sp_acl_erp_mask_erp_id(aentry->erp_mask);
+ char *enc_key = aentry->ht_key.enc_key;
char ptce3_pl[MLXSW_REG_PTCE3_LEN];
mlxsw_reg_ptce3_pack(ptce3_pl, false, MLXSW_REG_PTCE3_OP_WRITE_WRITE, 0,
- region->tcam_region_info, aentry->ht_key.enc_key,
- erp_id, refcount_read(&lkey_id->refcnt) != 1,
+ region->tcam_region_info,
+ enc_key, erp_id,
+ aentry->delta_info.start,
+ aentry->delta_info.mask,
+ aentry->delta_info.value,
+ refcount_read(&lkey_id->refcnt) != 1,
lkey_id->id, 0);
mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptce3), ptce3_pl);
aregion->ops->lkey_id_put(aregion, lkey_id);
struct mlxsw_sp_acl_tcam_region *region = aregion->region;
char mask[MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN] = { 0 };
struct mlxsw_afk *afk = mlxsw_sp_acl_afk(mlxsw_sp->acl);
+ const struct mlxsw_sp_acl_erp_delta *delta;
struct mlxsw_sp_acl_erp_mask *erp_mask;
int err;
mlxsw_afk_encode(afk, region->key_info, &rulei->values,
- aentry->ht_key.enc_key, mask);
+ aentry->full_enc_key, mask);
erp_mask = mlxsw_sp_acl_erp_mask_get(aregion, mask, false);
if (IS_ERR(erp_mask))
return PTR_ERR(erp_mask);
aentry->erp_mask = erp_mask;
aentry->ht_key.erp_id = mlxsw_sp_acl_erp_mask_erp_id(erp_mask);
+ memcpy(aentry->ht_key.enc_key, aentry->full_enc_key,
+ sizeof(aentry->ht_key.enc_key));
+
+ /* Compute all needed delta information and clear the delta bits
+ * from the encrypted key.
+ */
+ delta = mlxsw_sp_acl_erp_delta(aentry->erp_mask);
+ aentry->delta_info.start = mlxsw_sp_acl_erp_delta_start(delta);
+ aentry->delta_info.mask = mlxsw_sp_acl_erp_delta_mask(delta);
+ aentry->delta_info.value =
+ mlxsw_sp_acl_erp_delta_value(delta, aentry->full_enc_key);
+ mlxsw_sp_acl_erp_delta_clear(delta, aentry->ht_key.enc_key);
/* We can't insert identical rules into the A-TCAM, so fail and
* let the rule spill into C-TCAM
struct mlxsw_sp_acl_erp_key {
char mask[MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN];
+#define __MASK_LEN 0x38
+#define __MASK_IDX(i) (__MASK_LEN - (i) - 1)
bool ctcam;
};
unsigned int num_atcam_erps;
unsigned int num_max_atcam_erps;
unsigned int num_ctcam_erps;
+ unsigned int num_deltas;
struct objagg *objagg;
};
{
int err;
- /* If there are C-TCAM eRPs in use we need to transition
+ /* If there are C-TCAM eRP or deltas 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 &&
return err;
}
- /* When C-TCAM is used, the eRP table must be used */
+ /* When C-TCAM or deltas are used, the eRP table must be used */
if (erp_table->ops != &erp_multiple_masks_ops)
erp_table->ops = &erp_multiple_masks_ops;
&erp_table->num_ctcam_erps);
}
+static int mlxsw_sp_acl_erp_delta_inc(struct mlxsw_sp_acl_erp_table *erp_table)
+{
+ return __mlxsw_sp_acl_erp_table_other_inc(erp_table,
+ &erp_table->num_deltas);
+}
+
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
+ /* If there are no C-TCAM eRP or deltas 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)
+ if (erp_table->num_ctcam_erps > 0 || erp_table->num_deltas > 0)
return;
switch (erp_table->num_atcam_erps) {
&erp_table->num_ctcam_erps);
}
+static void mlxsw_sp_acl_erp_delta_dec(struct mlxsw_sp_acl_erp_table *erp_table)
+{
+ __mlxsw_sp_acl_erp_table_other_dec(erp_table,
+ &erp_table->num_deltas);
+}
+
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_index_put(erp_table, erp->index);
mlxsw_sp_acl_erp_generic_destroy(erp);
- if (erp_table->num_atcam_erps == 2 && erp_table->num_ctcam_erps == 0)
+ if (erp_table->num_atcam_erps == 2 && erp_table->num_ctcam_erps == 0 &&
+ erp_table->num_deltas == 0)
erp_table->ops = &erp_two_masks_ops;
}
return erp->id;
}
+struct mlxsw_sp_acl_erp_delta {
+ struct mlxsw_sp_acl_erp_key key;
+ u16 start;
+ u8 mask;
+};
+
+u16 mlxsw_sp_acl_erp_delta_start(const struct mlxsw_sp_acl_erp_delta *delta)
+{
+ return delta->start;
+}
+
+u8 mlxsw_sp_acl_erp_delta_mask(const struct mlxsw_sp_acl_erp_delta *delta)
+{
+ return delta->mask;
+}
+
+u8 mlxsw_sp_acl_erp_delta_value(const struct mlxsw_sp_acl_erp_delta *delta,
+ const char *enc_key)
+{
+ u16 start = delta->start;
+ u8 mask = delta->mask;
+ u16 tmp;
+
+ if (!mask)
+ return 0;
+
+ tmp = (unsigned char) enc_key[__MASK_IDX(start / 8)];
+ if (start / 8 + 1 < __MASK_LEN)
+ tmp |= (unsigned char) enc_key[__MASK_IDX(start / 8 + 1)] << 8;
+ tmp >>= start % 8;
+ tmp &= mask;
+ return tmp;
+}
+
+void mlxsw_sp_acl_erp_delta_clear(const struct mlxsw_sp_acl_erp_delta *delta,
+ const char *enc_key)
+{
+ u16 start = delta->start;
+ u8 mask = delta->mask;
+ unsigned char *byte;
+ u16 tmp;
+
+ tmp = mask;
+ tmp <<= start % 8;
+ tmp = ~tmp;
+
+ byte = (unsigned char *) &enc_key[__MASK_IDX(start / 8)];
+ *byte &= tmp & 0xff;
+ if (start / 8 + 1 < __MASK_LEN) {
+ byte = (unsigned char *) &enc_key[__MASK_IDX(start / 8 + 1)];
+ *byte &= (tmp >> 8) & 0xff;
+ }
+}
+
+static const struct mlxsw_sp_acl_erp_delta
+mlxsw_sp_acl_erp_delta_default = {};
+
+const struct mlxsw_sp_acl_erp_delta *
+mlxsw_sp_acl_erp_delta(const struct mlxsw_sp_acl_erp_mask *erp_mask)
+{
+ struct objagg_obj *objagg_obj = (struct objagg_obj *) erp_mask;
+ const struct mlxsw_sp_acl_erp_delta *delta;
+
+ delta = objagg_obj_delta_priv(objagg_obj);
+ if (!delta)
+ delta = &mlxsw_sp_acl_erp_delta_default;
+ return delta;
+}
+
+static int
+mlxsw_sp_acl_erp_delta_fill(const struct mlxsw_sp_acl_erp_key *parent_key,
+ const struct mlxsw_sp_acl_erp_key *key,
+ u16 *delta_start, u8 *delta_mask)
+{
+ int offset = 0;
+ int si = -1;
+ u16 pmask;
+ u16 mask;
+ int i;
+
+ /* The difference between 2 masks can be up to 8 consecutive bits. */
+ for (i = 0; i < __MASK_LEN; i++) {
+ if (parent_key->mask[__MASK_IDX(i)] == key->mask[__MASK_IDX(i)])
+ continue;
+ if (si == -1)
+ si = i;
+ else if (si != i - 1)
+ return -EINVAL;
+ }
+ if (si == -1) {
+ /* The masks are the same, this cannot happen.
+ * That means the caller is broken.
+ */
+ WARN_ON(1);
+ *delta_start = 0;
+ *delta_mask = 0;
+ return 0;
+ }
+ pmask = (unsigned char) parent_key->mask[__MASK_IDX(si)];
+ mask = (unsigned char) key->mask[__MASK_IDX(si)];
+ if (si + 1 < __MASK_LEN) {
+ pmask |= (unsigned char) parent_key->mask[__MASK_IDX(si + 1)] << 8;
+ mask |= (unsigned char) key->mask[__MASK_IDX(si + 1)] << 8;
+ }
+
+ if ((pmask ^ mask) & pmask)
+ return -EINVAL;
+ mask &= ~pmask;
+ while (!(mask & (1 << offset)))
+ offset++;
+ while (!(mask & 1))
+ mask >>= 1;
+ if (mask & 0xff00)
+ return -EINVAL;
+
+ *delta_start = si * 8 + offset;
+ *delta_mask = mask;
+
+ return 0;
+}
+
static void *mlxsw_sp_acl_erp_delta_create(void *priv, void *parent_obj,
void *obj)
{
- return ERR_PTR(-EOPNOTSUPP);
+ struct mlxsw_sp_acl_erp_key *parent_key = parent_obj;
+ struct mlxsw_sp_acl_atcam_region *aregion = priv;
+ struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table;
+ struct mlxsw_sp_acl_erp_key *key = obj;
+ struct mlxsw_sp_acl_erp_delta *delta;
+ u16 delta_start;
+ u8 delta_mask;
+ int err;
+
+ if (parent_key->ctcam || key->ctcam)
+ return ERR_PTR(-EINVAL);
+ err = mlxsw_sp_acl_erp_delta_fill(parent_key, key,
+ &delta_start, &delta_mask);
+ if (err)
+ return ERR_PTR(-EINVAL);
+
+ delta = kzalloc(sizeof(*delta), GFP_KERNEL);
+ if (!delta)
+ return ERR_PTR(-ENOMEM);
+ delta->start = delta_start;
+ delta->mask = delta_mask;
+
+ err = mlxsw_sp_acl_erp_delta_inc(erp_table);
+ if (err)
+ goto err_erp_delta_inc;
+
+ memcpy(&delta->key, key, sizeof(*key));
+ err = mlxsw_sp_acl_erp_master_mask_set(erp_table, &delta->key);
+ if (err)
+ goto err_master_mask_set;
+
+ return delta;
+
+err_master_mask_set:
+ mlxsw_sp_acl_erp_delta_dec(erp_table);
+err_erp_delta_inc:
+ kfree(delta);
+ return ERR_PTR(err);
}
static void mlxsw_sp_acl_erp_delta_destroy(void *priv, void *delta_priv)
{
+ struct mlxsw_sp_acl_erp_delta *delta = delta_priv;
+ struct mlxsw_sp_acl_atcam_region *aregion = priv;
+ struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table;
+
+ mlxsw_sp_acl_erp_master_mask_clear(erp_table, &delta->key);
+ mlxsw_sp_acl_erp_delta_dec(erp_table);
+ kfree(delta);
}
static void *mlxsw_sp_acl_erp_root_create(void *priv, void *obj)
};
struct mlxsw_sp_acl_atcam_entry_ht_key {
- char enc_key[MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN]; /* Encoded key */
+ char enc_key[MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN]; /* Encoded key,
+ * minus delta bits.
+ */
u8 erp_id;
};
struct mlxsw_sp_acl_atcam_entry {
struct rhash_head ht_node;
struct mlxsw_sp_acl_atcam_entry_ht_key ht_key;
+ char full_enc_key[MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN]; /* Encoded key */
+ struct {
+ u16 start;
+ u8 mask;
+ u8 value;
+ } delta_info;
struct mlxsw_sp_acl_ctcam_entry centry;
struct mlxsw_sp_acl_atcam_lkey_id *lkey_id;
struct mlxsw_sp_acl_erp_mask *erp_mask;
void mlxsw_sp_acl_atcam_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_atcam *atcam);
+struct mlxsw_sp_acl_erp_delta;
+
+u16 mlxsw_sp_acl_erp_delta_start(const struct mlxsw_sp_acl_erp_delta *delta);
+u8 mlxsw_sp_acl_erp_delta_mask(const struct mlxsw_sp_acl_erp_delta *delta);
+u8 mlxsw_sp_acl_erp_delta_value(const struct mlxsw_sp_acl_erp_delta *delta,
+ const char *enc_key);
+void mlxsw_sp_acl_erp_delta_clear(const struct mlxsw_sp_acl_erp_delta *delta,
+ const char *enc_key);
+
struct mlxsw_sp_acl_erp_mask;
bool
mlxsw_sp_acl_erp_mask_is_ctcam(const struct mlxsw_sp_acl_erp_mask *erp_mask);
u8 mlxsw_sp_acl_erp_mask_erp_id(const struct mlxsw_sp_acl_erp_mask *erp_mask);
+const struct mlxsw_sp_acl_erp_delta *
+mlxsw_sp_acl_erp_delta(const struct mlxsw_sp_acl_erp_mask *erp_mask);
struct mlxsw_sp_acl_erp_mask *
mlxsw_sp_acl_erp_mask_get(struct mlxsw_sp_acl_atcam_region *aregion,
const char *mask, bool ctcam);
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