mirror of https://gitee.com/openkylin/linux.git
sfc: use a semaphore to lock farch filters too
With this change, the spinlock efx->filter_lock is no longer used and is thus removed. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Edward Cree
David S. Miller
parent
c2bebe37c6
commit
fc7a6c287f
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@ -1878,6 +1878,7 @@ struct efx_farch_filter_table {
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};
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struct efx_farch_filter_state {
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struct rw_semaphore lock; /* Protects table contents */
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struct efx_farch_filter_table table[EFX_FARCH_FILTER_TABLE_COUNT];
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};
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@ -2397,9 +2398,13 @@ s32 efx_farch_filter_insert(struct efx_nic *efx,
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if (rc)
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return rc;
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down_write(&state->lock);
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table = &state->table[efx_farch_filter_spec_table_id(&spec)];
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if (table->size == 0)
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return -EINVAL;
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if (table->size == 0) {
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rc = -EINVAL;
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goto out_unlock;
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}
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netif_vdbg(efx, hw, efx->net_dev,
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"%s: type %d search_limit=%d", __func__, spec.type,
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@ -2412,8 +2417,6 @@ s32 efx_farch_filter_insert(struct efx_nic *efx,
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EFX_FARCH_FILTER_MC_DEF - EFX_FARCH_FILTER_UC_DEF);
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rep_index = spec.type - EFX_FARCH_FILTER_UC_DEF;
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ins_index = rep_index;
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spin_lock_bh(&efx->filter_lock);
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} else {
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/* Search concurrently for
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* (1) a filter to be replaced (rep_index): any filter
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@ -2443,8 +2446,6 @@ s32 efx_farch_filter_insert(struct efx_nic *efx,
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ins_index = -1;
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depth = 1;
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spin_lock_bh(&efx->filter_lock);
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for (;;) {
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if (!test_bit(i, table->used_bitmap)) {
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if (ins_index < 0)
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@ -2463,7 +2464,7 @@ s32 efx_farch_filter_insert(struct efx_nic *efx,
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/* Case (b) */
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if (ins_index < 0) {
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rc = -EBUSY;
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goto out;
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goto out_unlock;
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}
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rep_index = -1;
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break;
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@ -2483,11 +2484,11 @@ s32 efx_farch_filter_insert(struct efx_nic *efx,
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if (spec.priority == saved_spec->priority && !replace_equal) {
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rc = -EEXIST;
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goto out;
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goto out_unlock;
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}
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if (spec.priority < saved_spec->priority) {
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rc = -EPERM;
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goto out;
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goto out_unlock;
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}
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if (saved_spec->priority == EFX_FILTER_PRI_AUTO ||
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saved_spec->flags & EFX_FILTER_FLAG_RX_OVER_AUTO)
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@ -2528,8 +2529,8 @@ s32 efx_farch_filter_insert(struct efx_nic *efx,
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__func__, spec.type, ins_index, spec.dmaq_id);
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rc = efx_farch_filter_make_id(&spec, ins_index);
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out:
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spin_unlock_bh(&efx->filter_lock);
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out_unlock:
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up_write(&state->lock);
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return rc;
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}
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@ -2604,11 +2605,11 @@ int efx_farch_filter_remove_safe(struct efx_nic *efx,
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filter_idx = efx_farch_filter_id_index(filter_id);
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if (filter_idx >= table->size)
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return -ENOENT;
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down_write(&state->lock);
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spec = &table->spec[filter_idx];
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spin_lock_bh(&efx->filter_lock);
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rc = efx_farch_filter_remove(efx, table, filter_idx, priority);
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spin_unlock_bh(&efx->filter_lock);
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up_write(&state->lock);
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return rc;
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}
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@ -2622,30 +2623,28 @@ int efx_farch_filter_get_safe(struct efx_nic *efx,
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struct efx_farch_filter_table *table;
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struct efx_farch_filter_spec *spec;
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unsigned int filter_idx;
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int rc;
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int rc = -ENOENT;
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down_read(&state->lock);
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table_id = efx_farch_filter_id_table_id(filter_id);
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if ((unsigned int)table_id >= EFX_FARCH_FILTER_TABLE_COUNT)
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return -ENOENT;
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goto out_unlock;
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table = &state->table[table_id];
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filter_idx = efx_farch_filter_id_index(filter_id);
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if (filter_idx >= table->size)
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return -ENOENT;
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goto out_unlock;
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spec = &table->spec[filter_idx];
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spin_lock_bh(&efx->filter_lock);
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if (test_bit(filter_idx, table->used_bitmap) &&
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spec->priority == priority) {
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efx_farch_filter_to_gen_spec(spec_buf, spec);
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rc = 0;
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} else {
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rc = -ENOENT;
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}
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spin_unlock_bh(&efx->filter_lock);
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out_unlock:
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up_read(&state->lock);
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return rc;
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}
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@ -2658,13 +2657,13 @@ efx_farch_filter_table_clear(struct efx_nic *efx,
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struct efx_farch_filter_table *table = &state->table[table_id];
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unsigned int filter_idx;
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spin_lock_bh(&efx->filter_lock);
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down_write(&state->lock);
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for (filter_idx = 0; filter_idx < table->size; ++filter_idx) {
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if (table->spec[filter_idx].priority != EFX_FILTER_PRI_AUTO)
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efx_farch_filter_remove(efx, table,
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filter_idx, priority);
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}
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spin_unlock_bh(&efx->filter_lock);
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up_write(&state->lock);
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}
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int efx_farch_filter_clear_rx(struct efx_nic *efx,
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@ -2688,7 +2687,7 @@ u32 efx_farch_filter_count_rx_used(struct efx_nic *efx,
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unsigned int filter_idx;
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u32 count = 0;
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spin_lock_bh(&efx->filter_lock);
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down_read(&state->lock);
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for (table_id = EFX_FARCH_FILTER_TABLE_RX_IP;
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table_id <= EFX_FARCH_FILTER_TABLE_RX_DEF;
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@ -2701,7 +2700,7 @@ u32 efx_farch_filter_count_rx_used(struct efx_nic *efx,
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}
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}
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spin_unlock_bh(&efx->filter_lock);
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up_read(&state->lock);
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return count;
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}
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@ -2716,7 +2715,7 @@ s32 efx_farch_filter_get_rx_ids(struct efx_nic *efx,
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unsigned int filter_idx;
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s32 count = 0;
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spin_lock_bh(&efx->filter_lock);
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down_read(&state->lock);
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for (table_id = EFX_FARCH_FILTER_TABLE_RX_IP;
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table_id <= EFX_FARCH_FILTER_TABLE_RX_DEF;
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@ -2735,7 +2734,7 @@ s32 efx_farch_filter_get_rx_ids(struct efx_nic *efx,
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}
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}
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out:
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spin_unlock_bh(&efx->filter_lock);
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up_read(&state->lock);
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return count;
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}
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@ -2749,7 +2748,7 @@ void efx_farch_filter_table_restore(struct efx_nic *efx)
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efx_oword_t filter;
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unsigned int filter_idx;
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spin_lock_bh(&efx->filter_lock);
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down_write(&state->lock);
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for (table_id = 0; table_id < EFX_FARCH_FILTER_TABLE_COUNT; table_id++) {
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table = &state->table[table_id];
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@ -2770,7 +2769,7 @@ void efx_farch_filter_table_restore(struct efx_nic *efx)
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efx_farch_filter_push_rx_config(efx);
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efx_farch_filter_push_tx_limits(efx);
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spin_unlock_bh(&efx->filter_lock);
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up_write(&state->lock);
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}
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void efx_farch_filter_table_remove(struct efx_nic *efx)
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@ -2864,7 +2863,7 @@ void efx_farch_filter_update_rx_scatter(struct efx_nic *efx)
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efx_oword_t filter;
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unsigned int filter_idx;
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spin_lock_bh(&efx->filter_lock);
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down_write(&state->lock);
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for (table_id = EFX_FARCH_FILTER_TABLE_RX_IP;
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table_id <= EFX_FARCH_FILTER_TABLE_RX_DEF;
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@ -2896,7 +2895,7 @@ void efx_farch_filter_update_rx_scatter(struct efx_nic *efx)
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efx_farch_filter_push_rx_config(efx);
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spin_unlock_bh(&efx->filter_lock);
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up_write(&state->lock);
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}
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#ifdef CONFIG_RFS_ACCEL
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@ -2908,7 +2907,7 @@ bool efx_farch_filter_rfs_expire_one(struct efx_nic *efx, u32 flow_id,
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struct efx_farch_filter_table *table;
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bool ret = false;
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spin_lock_bh(&efx->filter_lock);
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down_write(&state->lock);
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table = &state->table[EFX_FARCH_FILTER_TABLE_RX_IP];
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if (test_bit(index, table->used_bitmap) &&
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table->spec[index].priority == EFX_FILTER_PRI_HINT &&
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@ -2918,7 +2917,7 @@ bool efx_farch_filter_rfs_expire_one(struct efx_nic *efx, u32 flow_id,
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ret = true;
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}
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spin_unlock_bh(&efx->filter_lock);
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up_write(&state->lock);
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return ret;
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}
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@ -844,7 +844,6 @@ struct efx_rss_context {
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* @loopback_modes: Supported loopback mode bitmask
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* @loopback_selftest: Offline self-test private state
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* @filter_sem: Filter table rw_semaphore, protects existence of @filter_state
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* @filter_lock: Filter table lock, for mere content changes
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* @filter_state: Architecture-dependent filter table state
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* @rps_mutex: Protects RPS state of all channels
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* @rps_expire_channel: Next channel to check for expiry
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@ -998,7 +997,6 @@ struct efx_nic {
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void *loopback_selftest;
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struct rw_semaphore filter_sem;
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spinlock_t filter_lock;
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void *filter_state;
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#ifdef CONFIG_RFS_ACCEL
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struct mutex rps_mutex;
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