[linux-2.6-block.git] / drivers / infiniband / hw / mlx4 / ah.c

/*
 * 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 <rdma/ib_addr.h>
#include <rdma/ib_cache.h>

#include <linux/slab.h>
#include <linux/inet.h>
#include <linux/string.h>
#include <linux/mlx4/driver.h>

#include "mlx4_ib.h"

static struct ib_ah *create_ib_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr,
				  struct mlx4_ib_ah *ah)
{
	struct mlx4_dev *dev = to_mdev(pd->device)->dev;

	ah->av.ib.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
	ah->av.ib.g_slid  = ah_attr->src_path_bits;
	ah->av.ib.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
	if (ah_attr->ah_flags & IB_AH_GRH) {
		ah->av.ib.g_slid   |= 0x80;
		ah->av.ib.gid_index = ah_attr->grh.sgid_index;
		ah->av.ib.hop_limit = ah_attr->grh.hop_limit;
		ah->av.ib.sl_tclass_flowlabel |=
			cpu_to_be32((ah_attr->grh.traffic_class << 20) |
				    ah_attr->grh.flow_label);
		memcpy(ah->av.ib.dgid, ah_attr->grh.dgid.raw, 16);
	}

	ah->av.ib.dlid    = cpu_to_be16(ah_attr->dlid);
	if (ah_attr->static_rate) {
		ah->av.ib.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
		while (ah->av.ib.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
		       !(1 << ah->av.ib.stat_rate & dev->caps.stat_rate_support))
			--ah->av.ib.stat_rate;
	}

	return &ah->ibah;
}

static struct ib_ah *create_iboe_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr,
				    struct mlx4_ib_ah *ah)
{
	struct mlx4_ib_dev *ibdev = to_mdev(pd->device);
	struct mlx4_dev *dev = ibdev->dev;
	int is_mcast = 0;
	struct in6_addr in6;
	u16 vlan_tag = 0xffff;
	union ib_gid sgid;
	struct ib_gid_attr gid_attr;
	int ret;

	memcpy(&in6, ah_attr->grh.dgid.raw, sizeof(in6));
	if (rdma_is_multicast_addr(&in6)) {
		is_mcast = 1;
		rdma_get_mcast_mac(&in6, ah->av.eth.mac);
	} else {
		memcpy(ah->av.eth.mac, ah_attr->dmac, ETH_ALEN);
	}
	ret = ib_get_cached_gid(pd->device, ah_attr->port_num,
				ah_attr->grh.sgid_index, &sgid, &gid_attr);
	if (ret)
		return ERR_PTR(ret);
	eth_zero_addr(ah->av.eth.s_mac);
	if (gid_attr.ndev) {
		if (is_vlan_dev(gid_attr.ndev))
			vlan_tag = vlan_dev_vlan_id(gid_attr.ndev);
		memcpy(ah->av.eth.s_mac, gid_attr.ndev->dev_addr, ETH_ALEN);
		dev_put(gid_attr.ndev);
	}
	if (vlan_tag < 0x1000)
		vlan_tag |= (ah_attr->sl & 7) << 13;
	ah->av.eth.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
	ah->av.eth.gid_index = mlx4_ib_gid_index_to_real_index(ibdev, ah_attr->port_num, ah_attr->grh.sgid_index);
	ah->av.eth.vlan = cpu_to_be16(vlan_tag);
	ah->av.eth.hop_limit = ah_attr->grh.hop_limit;
	if (ah_attr->static_rate) {
		ah->av.eth.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
		while (ah->av.eth.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
		       !(1 << ah->av.eth.stat_rate & dev->caps.stat_rate_support))
			--ah->av.eth.stat_rate;
	}

	/*
	 * HW requires multicast LID so we just choose one.
	 */
	if (is_mcast)
		ah->av.ib.dlid = cpu_to_be16(0xc000);

	memcpy(ah->av.eth.dgid, ah_attr->grh.dgid.raw, 16);
	ah->av.eth.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 29);

	return &ah->ibah;
}

struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
{
	struct mlx4_ib_ah *ah;
	struct ib_ah *ret;

	ah = kzalloc(sizeof *ah, GFP_ATOMIC);
	if (!ah)
		return ERR_PTR(-ENOMEM);

	if (rdma_port_get_link_layer(pd->device, ah_attr->port_num) == IB_LINK_LAYER_ETHERNET) {
		if (!(ah_attr->ah_flags & IB_AH_GRH)) {
			ret = ERR_PTR(-EINVAL);
		} else {
			/*
			 * TBD: need to handle the case when we get
			 * called in an atomic context and there we
			 * might sleep.  We don't expect this
			 * currently since we're working with link
			 * local addresses which we can translate
			 * without going to sleep.
			 */
			ret = create_iboe_ah(pd, ah_attr, ah);
		}

		if (IS_ERR(ret))
			kfree(ah);

		return ret;
	} else
		return create_ib_ah(pd, ah_attr, ah); /* never fails */
}

int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
{
	struct mlx4_ib_ah *ah = to_mah(ibah);
	enum rdma_link_layer ll;

	memset(ah_attr, 0, sizeof *ah_attr);
	ah_attr->port_num = be32_to_cpu(ah->av.ib.port_pd) >> 24;
	ll = rdma_port_get_link_layer(ibah->device, ah_attr->port_num);
	if (ll == IB_LINK_LAYER_ETHERNET)
		ah_attr->sl = be32_to_cpu(ah->av.eth.sl_tclass_flowlabel) >> 29;
	else
		ah_attr->sl = be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;

	ah_attr->dlid = ll == IB_LINK_LAYER_INFINIBAND ? be16_to_cpu(ah->av.ib.dlid) : 0;
	if (ah->av.ib.stat_rate)
		ah_attr->static_rate = ah->av.ib.stat_rate - MLX4_STAT_RATE_OFFSET;
	ah_attr->src_path_bits = ah->av.ib.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.ib.sl_tclass_flowlabel) >> 20;
		ah_attr->grh.flow_label =
			be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) & 0xfffff;
		ah_attr->grh.hop_limit  = ah->av.ib.hop_limit;
		ah_attr->grh.sgid_index = ah->av.ib.gid_index;
		memcpy(ah_attr->grh.dgid.raw, ah->av.ib.dgid, 16);
	}

	return 0;
}

int mlx4_ib_destroy_ah(struct ib_ah *ah)
{
	kfree(to_mah(ah));
	return 0;
}
Commit	Line	Data
225c7b1f RD	1	/*
	2	* Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
	3	*
	4	* This software is available to you under a choice of one of two
	5	* licenses. You may choose to be licensed under the terms of the GNU
	6	* General Public License (GPL) Version 2, available from the file
	7	* COPYING in the main directory of this source tree, or the
	8	* OpenIB.org BSD license below:
	9	*
	10	* Redistribution and use in source and binary forms, with or
	11	* without modification, are permitted provided that the following
	12	* conditions are met:
	13	*
	14	* - Redistributions of source code must retain the above
	15	* copyright notice, this list of conditions and the following
	16	* disclaimer.
	17	*
	18	* - Redistributions in binary form must reproduce the above
	19	* copyright notice, this list of conditions and the following
	20	* disclaimer in the documentation and/or other materials
	21	* provided with the distribution.
	22	*
	23	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	24	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	25	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	26	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	27	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	28	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	29	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	30	* SOFTWARE.
	31	*/
	32
fa417f7b	33	#include <rdma/ib_addr.h>
4c3eb3ca	34	#include <rdma/ib_cache.h>
fa417f7b	35
5a0e3ad6	36	#include <linux/slab.h>
fa417f7b EC	37	#include <linux/inet.h>
fa417f7b EC	38	#include <linux/string.h>
c6215745	39	#include <linux/mlx4/driver.h>
5a0e3ad6	40
225c7b1f RD	41	#include "mlx4_ib.h"
225c7b1f RD	42
fa417f7b EC	43	static struct ib_ah create_ib_ah(struct ib_pd pd, struct ib_ah_attr *ah_attr,
	44	struct mlx4_ib_ah *ah)
	45	{
	46	struct mlx4_dev *dev = to_mdev(pd->device)->dev;
	47
	48	ah->av.ib.port_pd = cpu_to_be32(to_mpd(pd)->pdn \| (ah_attr->port_num << 24));
	49	ah->av.ib.g_slid = ah_attr->src_path_bits;
8c5122e4	50	ah->av.ib.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
225c7b1f	51	if (ah_attr->ah_flags & IB_AH_GRH) {
fa417f7b EC	52	ah->av.ib.g_slid \|= 0x80;
	53	ah->av.ib.gid_index = ah_attr->grh.sgid_index;
	54	ah->av.ib.hop_limit = ah_attr->grh.hop_limit;
	55	ah->av.ib.sl_tclass_flowlabel \|=
225c7b1f RD	56	cpu_to_be32((ah_attr->grh.traffic_class << 20) \|
225c7b1f RD	57	ah_attr->grh.flow_label);
fa417f7b EC	58	memcpy(ah->av.ib.dgid, ah_attr->grh.dgid.raw, 16);
	59	}
	60
	61	ah->av.ib.dlid = cpu_to_be16(ah_attr->dlid);
	62	if (ah_attr->static_rate) {
	63	ah->av.ib.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
	64	while (ah->av.ib.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
	65	!(1 << ah->av.ib.stat_rate & dev->caps.stat_rate_support))
	66	--ah->av.ib.stat_rate;
225c7b1f RD	67	}
	68
	69	return &ah->ibah;
	70	}
	71
fa417f7b EC	72	static struct ib_ah create_iboe_ah(struct ib_pd pd, struct ib_ah_attr *ah_attr,
	73	struct mlx4_ib_ah *ah)
	74	{
	75	struct mlx4_ib_dev *ibdev = to_mdev(pd->device);
	76	struct mlx4_dev *dev = ibdev->dev;
bfdfcfee	77	int is_mcast = 0;
297e0dad	78	struct in6_addr in6;
dbf727de MB	79	u16 vlan_tag = 0xffff;
	80	union ib_gid sgid;
	81	struct ib_gid_attr gid_attr;
	82	int ret;
fa417f7b	83
297e0dad MS	84	memcpy(&in6, ah_attr->grh.dgid.raw, sizeof(in6));
	85	if (rdma_is_multicast_addr(&in6)) {
	86	is_mcast = 1;
	87	rdma_get_mcast_mac(&in6, ah->av.eth.mac);
	88	} else {
	89	memcpy(ah->av.eth.mac, ah_attr->dmac, ETH_ALEN);
	90	}
dbf727de MB	91	ret = ib_get_cached_gid(pd->device, ah_attr->port_num,
	92	ah_attr->grh.sgid_index, &sgid, &gid_attr);
	93	if (ret)
	94	return ERR_PTR(ret);
39f42655	95	eth_zero_addr(ah->av.eth.s_mac);
dbf727de MB	96	if (gid_attr.ndev) {
	97	if (is_vlan_dev(gid_attr.ndev))
	98	vlan_tag = vlan_dev_vlan_id(gid_attr.ndev);
	99	memcpy(ah->av.eth.s_mac, gid_attr.ndev->dev_addr, ETH_ALEN);
	100	dev_put(gid_attr.ndev);
	101	}
4c3eb3ca EC	102	if (vlan_tag < 0x1000)
4c3eb3ca EC	103	vlan_tag \|= (ah_attr->sl & 7) << 13;
fa417f7b	104	ah->av.eth.port_pd = cpu_to_be32(to_mpd(pd)->pdn \| (ah_attr->port_num << 24));
5070cd22	105	ah->av.eth.gid_index = mlx4_ib_gid_index_to_real_index(ibdev, ah_attr->port_num, ah_attr->grh.sgid_index);
4c3eb3ca	106	ah->av.eth.vlan = cpu_to_be16(vlan_tag);
4e408167	107	ah->av.eth.hop_limit = ah_attr->grh.hop_limit;
fa417f7b EC	108	if (ah_attr->static_rate) {
	109	ah->av.eth.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
	110	while (ah->av.eth.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
	111	!(1 << ah->av.eth.stat_rate & dev->caps.stat_rate_support))
	112	--ah->av.eth.stat_rate;
	113	}
	114
	115	/*
	116	* HW requires multicast LID so we just choose one.
	117	*/
	118	if (is_mcast)
	119	ah->av.ib.dlid = cpu_to_be16(0xc000);
	120
	121	memcpy(ah->av.eth.dgid, ah_attr->grh.dgid.raw, 16);
9106c410	122	ah->av.eth.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 29);
fa417f7b EC	123
	124	return &ah->ibah;
	125	}
	126
	127	struct ib_ah mlx4_ib_create_ah(struct ib_pd pd, struct ib_ah_attr *ah_attr)
	128	{
	129	struct mlx4_ib_ah *ah;
	130	struct ib_ah *ret;
	131
	132	ah = kzalloc(sizeof *ah, GFP_ATOMIC);
	133	if (!ah)
	134	return ERR_PTR(-ENOMEM);
	135
	136	if (rdma_port_get_link_layer(pd->device, ah_attr->port_num) == IB_LINK_LAYER_ETHERNET) {
	137	if (!(ah_attr->ah_flags & IB_AH_GRH)) {
	138	ret = ERR_PTR(-EINVAL);
	139	} else {
	140	/*
	141	* TBD: need to handle the case when we get
	142	* called in an atomic context and there we
	143	* might sleep. We don't expect this
	144	* currently since we're working with link
	145	* local addresses which we can translate
	146	* without going to sleep.
	147	*/
	148	ret = create_iboe_ah(pd, ah_attr, ah);
	149	}
	150
	151	if (IS_ERR(ret))
	152	kfree(ah);
	153
	154	return ret;
	155	} else
	156	return create_ib_ah(pd, ah_attr, ah); /* never fails */
	157	}
	158
225c7b1f RD	159	int mlx4_ib_query_ah(struct ib_ah ibah, struct ib_ah_attr ah_attr)
	160	{
	161	struct mlx4_ib_ah *ah = to_mah(ibah);
fa417f7b	162	enum rdma_link_layer ll;
225c7b1f RD	163
225c7b1f RD	164	memset(ah_attr, 0, sizeof *ah_attr);
fa417f7b EC	165	ah_attr->port_num = be32_to_cpu(ah->av.ib.port_pd) >> 24;
fa417f7b EC	166	ll = rdma_port_get_link_layer(ibah->device, ah_attr->port_num);
5e99b139 NO	167	if (ll == IB_LINK_LAYER_ETHERNET)
	168	ah_attr->sl = be32_to_cpu(ah->av.eth.sl_tclass_flowlabel) >> 29;
	169	else
	170	ah_attr->sl = be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
	171
fa417f7b EC	172	ah_attr->dlid = ll == IB_LINK_LAYER_INFINIBAND ? be16_to_cpu(ah->av.ib.dlid) : 0;
	173	if (ah->av.ib.stat_rate)
	174	ah_attr->static_rate = ah->av.ib.stat_rate - MLX4_STAT_RATE_OFFSET;
	175	ah_attr->src_path_bits = ah->av.ib.g_slid & 0x7F;
225c7b1f RD	176
	177	if (mlx4_ib_ah_grh_present(ah)) {
	178	ah_attr->ah_flags = IB_AH_GRH;
	179
	180	ah_attr->grh.traffic_class =
fa417f7b	181	be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20;
225c7b1f	182	ah_attr->grh.flow_label =
fa417f7b EC	183	be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) & 0xfffff;
	184	ah_attr->grh.hop_limit = ah->av.ib.hop_limit;
	185	ah_attr->grh.sgid_index = ah->av.ib.gid_index;
	186	memcpy(ah_attr->grh.dgid.raw, ah->av.ib.dgid, 16);
225c7b1f RD	187	}
	188
	189	return 0;
	190	}
	191
	192	int mlx4_ib_destroy_ah(struct ib_ah *ah)
	193	{
	194	kfree(to_mah(ah));
	195	return 0;
	196	}