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mlx5: Add driver for Mellanox Connect-IB adapters
The driver is comprised of two kernel modules: mlx5_ib and mlx5_core. This partitioning resembles what we have for mlx4, except that mlx5_ib is the pci device driver and not mlx5_core. mlx5_core is essentially a library that provides general functionality that is intended to be used by other Mellanox devices that will be introduced in the future. mlx5_ib has a similar role as any hardware device under drivers/infiniband/hw. Signed-off-by: Eli Cohen <eli@mellanox.com> Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> [ Merge in coccinelle fixes from Fengguang Wu <fengguang.wu@intel.com>. - Roland ] Signed-off-by: Roland Dreier <roland@purestorage.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| config MLX5_INFINIBAND | ||
| tristate "Mellanox Connect-IB HCA support" | ||
| depends on NETDEVICES && ETHERNET && PCI && X86 | ||
| select NET_VENDOR_MELLANOX | ||
| select MLX5_CORE | ||
| ---help--- | ||
| This driver provides low-level InfiniBand support for | ||
| Mellanox Connect-IB PCI Express host channel adapters (HCAs). | ||
| This is required to use InfiniBand protocols such as | ||
| IP-over-IB or SRP with these devices. |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| obj-$(CONFIG_MLX5_INFINIBAND) += mlx5_ib.o | ||
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||
| mlx5_ib-y := main.o cq.o doorbell.o qp.o mem.o srq.o mr.o ah.o mad.o |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| /* | ||
| * Copyright (c) 2013, Mellanox Technologies 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 "mlx5_ib.h" | ||
|
|
||
| struct ib_ah *create_ib_ah(struct ib_ah_attr *ah_attr, | ||
| struct mlx5_ib_ah *ah) | ||
| { | ||
| if (ah_attr->ah_flags & IB_AH_GRH) { | ||
| memcpy(ah->av.rgid, &ah_attr->grh.dgid, 16); | ||
| ah->av.grh_gid_fl = cpu_to_be32(ah_attr->grh.flow_label | | ||
| (1 << 30) | | ||
| ah_attr->grh.sgid_index << 20); | ||
| ah->av.hop_limit = ah_attr->grh.hop_limit; | ||
| ah->av.tclass = ah_attr->grh.traffic_class; | ||
| } | ||
|
|
||
| ah->av.rlid = cpu_to_be16(ah_attr->dlid); | ||
| ah->av.fl_mlid = ah_attr->src_path_bits & 0x7f; | ||
| ah->av.stat_rate_sl = (ah_attr->static_rate << 4) | (ah_attr->sl & 0xf); | ||
|
|
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| return &ah->ibah; | ||
| } | ||
|
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| struct ib_ah *mlx5_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) | ||
| { | ||
| struct mlx5_ib_ah *ah; | ||
|
|
||
| ah = kzalloc(sizeof(*ah), GFP_ATOMIC); | ||
| if (!ah) | ||
| return ERR_PTR(-ENOMEM); | ||
|
|
||
| return create_ib_ah(ah_attr, ah); /* never fails */ | ||
| } | ||
|
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||
| int mlx5_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) | ||
| { | ||
| struct mlx5_ib_ah *ah = to_mah(ibah); | ||
| u32 tmp; | ||
|
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| memset(ah_attr, 0, sizeof(*ah_attr)); | ||
|
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| tmp = be32_to_cpu(ah->av.grh_gid_fl); | ||
| if (tmp & (1 << 30)) { | ||
| ah_attr->ah_flags = IB_AH_GRH; | ||
| ah_attr->grh.sgid_index = (tmp >> 20) & 0xff; | ||
| ah_attr->grh.flow_label = tmp & 0xfffff; | ||
| memcpy(&ah_attr->grh.dgid, ah->av.rgid, 16); | ||
| ah_attr->grh.hop_limit = ah->av.hop_limit; | ||
| ah_attr->grh.traffic_class = ah->av.tclass; | ||
| } | ||
| ah_attr->dlid = be16_to_cpu(ah->av.rlid); | ||
| ah_attr->static_rate = ah->av.stat_rate_sl >> 4; | ||
| ah_attr->sl = ah->av.stat_rate_sl & 0xf; | ||
|
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| return 0; | ||
| } | ||
|
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| int mlx5_ib_destroy_ah(struct ib_ah *ah) | ||
| { | ||
| kfree(to_mah(ah)); | ||
| return 0; | ||
| } |
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