diff options
Diffstat (limited to 'drivers/infiniband/hw/mlx4/ah.c')
| -rw-r--r-- | drivers/infiniband/hw/mlx4/ah.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx4/ah.c b/drivers/infiniband/hw/mlx4/ah.c new file mode 100644 index 000000000000..c75ac9463e20 --- /dev/null +++ b/drivers/infiniband/hw/mlx4/ah.c @@ -0,0 +1,100 @@ +/* + * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "mlx4_ib.h" + +struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) +{ + struct mlx4_dev *dev = to_mdev(pd->device)->dev; + struct mlx4_ib_ah *ah; + + ah = kmalloc(sizeof *ah, GFP_ATOMIC); + if (!ah) + return ERR_PTR(-ENOMEM); + + memset(&ah->av, 0, sizeof ah->av); + + ah->av.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24)); + ah->av.g_slid = ah_attr->src_path_bits; + ah->av.dlid = cpu_to_be16(ah_attr->dlid); + if (ah_attr->static_rate) { + ah->av.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET; + while (ah->av.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && + !(1 << ah->av.stat_rate & dev->caps.stat_rate_support)) + --ah->av.stat_rate; + } + ah->av.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28); + if (ah_attr->ah_flags & IB_AH_GRH) { + ah->av.g_slid |= 0x80; + ah->av.gid_index = ah_attr->grh.sgid_index; + ah->av.hop_limit = ah_attr->grh.hop_limit; + ah->av.sl_tclass_flowlabel |= + cpu_to_be32((ah_attr->grh.traffic_class << 20) | + ah_attr->grh.flow_label); + memcpy(ah->av.dgid, ah_attr->grh.dgid.raw, 16); + } + + return &ah->ibah; +} + +int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) +{ + struct mlx4_ib_ah *ah = to_mah(ibah); + + memset(ah_attr, 0, sizeof *ah_attr); + ah_attr->dlid = be16_to_cpu(ah->av.dlid); + ah_attr->sl = be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 28; + ah_attr->port_num = be32_to_cpu(ah->av.port_pd) >> 24; + if (ah->av.stat_rate) + ah_attr->static_rate = ah->av.stat_rate - MLX4_STAT_RATE_OFFSET; + ah_attr->src_path_bits = ah->av.g_slid & 0x7F; + + if (mlx4_ib_ah_grh_present(ah)) { + ah_attr->ah_flags = IB_AH_GRH; + + ah_attr->grh.traffic_class = + be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 20; + ah_attr->grh.flow_label = + be32_to_cpu(ah->av.sl_tclass_flowlabel) & 0xfffff; + ah_attr->grh.hop_limit = ah->av.hop_limit; + ah_attr->grh.sgid_index = ah->av.gid_index; + memcpy(ah_attr->grh.dgid.raw, ah->av.dgid, 16); + } + + return 0; +} + +int mlx4_ib_destroy_ah(struct ib_ah *ah) +{ + kfree(to_mah(ah)); + return 0; +} |