[mirror_ubuntu-artful-kernel.git] / drivers / infiniband / hw / hns / hns_roce_ah.c

/*
 * Copyright (c) 2016 Hisilicon Limited.
 *
 * 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 <linux/platform_device.h>
#include <rdma/ib_addr.h>
#include <rdma/ib_cache.h>
#include "hns_roce_device.h"

#define HNS_ROCE_PORT_NUM_SHIFT		24
#define HNS_ROCE_VLAN_SL_BIT_MASK	7
#define HNS_ROCE_VLAN_SL_SHIFT		13

struct ib_ah *hns_roce_create_ah(struct ib_pd *ibpd,
				 struct rdma_ah_attr *ah_attr,
				 struct ib_udata *udata)
{
	struct hns_roce_dev *hr_dev = to_hr_dev(ibpd->device);
	struct device *dev = &hr_dev->pdev->dev;
	struct ib_gid_attr gid_attr;
	struct hns_roce_ah *ah;
	u16 vlan_tag = 0xffff;
	struct in6_addr in6;
	const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
	union ib_gid sgid;
	int ret;

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

	/* Get mac address */
	memcpy(&in6, grh->dgid.raw, sizeof(grh->dgid.raw));
	if (rdma_is_multicast_addr(&in6)) {
		rdma_get_mcast_mac(&in6, ah->av.mac);
	} else {
		u8 *dmac = rdma_ah_retrieve_dmac(ah_attr);

		if (!dmac) {
			kfree(ah);
			return ERR_PTR(-EINVAL);
		}
		memcpy(ah->av.mac, dmac, ETH_ALEN);
	}

	/* Get source gid */
	ret = ib_get_cached_gid(ibpd->device, rdma_ah_get_port_num(ah_attr),
				grh->sgid_index, &sgid, &gid_attr);
	if (ret) {
		dev_err(dev, "get sgid failed! ret = %d\n", ret);
		kfree(ah);
		return ERR_PTR(ret);
	}

	if (gid_attr.ndev) {
		if (is_vlan_dev(gid_attr.ndev))
			vlan_tag = vlan_dev_vlan_id(gid_attr.ndev);
		dev_put(gid_attr.ndev);
	}

	if (vlan_tag < 0x1000)
		vlan_tag |= (rdma_ah_get_sl(ah_attr) &
			     HNS_ROCE_VLAN_SL_BIT_MASK) <<
			     HNS_ROCE_VLAN_SL_SHIFT;

	ah->av.port_pd = cpu_to_be32(to_hr_pd(ibpd)->pdn |
				     (rdma_ah_get_port_num(ah_attr) <<
				     HNS_ROCE_PORT_NUM_SHIFT));
	ah->av.gid_index = grh->sgid_index;
	ah->av.vlan = cpu_to_le16(vlan_tag);
	dev_dbg(dev, "gid_index = 0x%x,vlan = 0x%x\n", ah->av.gid_index,
		ah->av.vlan);

	if (rdma_ah_get_static_rate(ah_attr))
		ah->av.stat_rate = IB_RATE_10_GBPS;

	memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
	ah->av.sl_tclass_flowlabel = cpu_to_le32(rdma_ah_get_sl(ah_attr) <<
						 HNS_ROCE_SL_SHIFT);

	return &ah->ibah;
}

int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
{
	struct hns_roce_ah *ah = to_hr_ah(ibah);

	memset(ah_attr, 0, sizeof(*ah_attr));

	rdma_ah_set_sl(ah_attr, (le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
				 HNS_ROCE_SL_SHIFT));
	rdma_ah_set_port_num(ah_attr, (le32_to_cpu(ah->av.port_pd) >>
				       HNS_ROCE_PORT_NUM_SHIFT));
	rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
	rdma_ah_set_grh(ah_attr, NULL,
			(le32_to_cpu(ah->av.sl_tclass_flowlabel) &
			 HNS_ROCE_FLOW_LABLE_MASK), ah->av.gid_index,
			ah->av.hop_limit,
			(le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
			 HNS_ROCE_TCLASS_SHIFT));
	rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);

	return 0;
}

int hns_roce_destroy_ah(struct ib_ah *ah)
{
	kfree(to_hr_ah(ah));

	return 0;
}
Commit	Line	Data
9a443537	1	/*
	2	* Copyright (c) 2016 Hisilicon Limited.
	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
	33	#include <linux/platform_device.h>
	34	#include <rdma/ib_addr.h>
	35	#include <rdma/ib_cache.h>
	36	#include "hns_roce_device.h"
	37
	38	#define HNS_ROCE_PORT_NUM_SHIFT 24
	39	#define HNS_ROCE_VLAN_SL_BIT_MASK 7
	40	#define HNS_ROCE_VLAN_SL_SHIFT 13
	41
90898850 DC	42	struct ib_ah hns_roce_create_ah(struct ib_pd ibpd,
90898850 DC	43	struct rdma_ah_attr *ah_attr,
477864c8	44	struct ib_udata *udata)
9a443537	45	{
	46	struct hns_roce_dev *hr_dev = to_hr_dev(ibpd->device);
	47	struct device *dev = &hr_dev->pdev->dev;
	48	struct ib_gid_attr gid_attr;
	49	struct hns_roce_ah *ah;
	50	u16 vlan_tag = 0xffff;
	51	struct in6_addr in6;
d8966fcd	52	const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
9a443537	53	union ib_gid sgid;
	54	int ret;
	55
	56	ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
	57	if (!ah)
	58	return ERR_PTR(-ENOMEM);
	59
	60	/* Get mac address */
d8966fcd DC	61	memcpy(&in6, grh->dgid.raw, sizeof(grh->dgid.raw));
d8966fcd DC	62	if (rdma_is_multicast_addr(&in6)) {
9a443537	63	rdma_get_mcast_mac(&in6, ah->av.mac);
d8966fcd DC	64	} else {
	65	u8 *dmac = rdma_ah_retrieve_dmac(ah_attr);
	66
5b59a396 CIK	67	if (!dmac) {
5b59a396 CIK	68	kfree(ah);
d8966fcd	69	return ERR_PTR(-EINVAL);
5b59a396	70	}
d8966fcd DC	71	memcpy(ah->av.mac, dmac, ETH_ALEN);
d8966fcd DC	72	}
9a443537	73
9a443537	74	/* Get source gid */
d8966fcd DC	75	ret = ib_get_cached_gid(ibpd->device, rdma_ah_get_port_num(ah_attr),
d8966fcd DC	76	grh->sgid_index, &sgid, &gid_attr);
9a443537	77	if (ret) {
	78	dev_err(dev, "get sgid failed! ret = %d\n", ret);
	79	kfree(ah);
	80	return ERR_PTR(ret);
	81	}
	82
	83	if (gid_attr.ndev) {
	84	if (is_vlan_dev(gid_attr.ndev))
	85	vlan_tag = vlan_dev_vlan_id(gid_attr.ndev);
	86	dev_put(gid_attr.ndev);
	87	}
	88
	89	if (vlan_tag < 0x1000)
d8966fcd DC	90	vlan_tag \|= (rdma_ah_get_sl(ah_attr) &
d8966fcd DC	91	HNS_ROCE_VLAN_SL_BIT_MASK) <<
9a443537	92	HNS_ROCE_VLAN_SL_SHIFT;
9a443537	93
d8966fcd DC	94	ah->av.port_pd = cpu_to_be32(to_hr_pd(ibpd)->pdn \|
d8966fcd DC	95	(rdma_ah_get_port_num(ah_attr) <<
9a443537	96	HNS_ROCE_PORT_NUM_SHIFT));
d8966fcd	97	ah->av.gid_index = grh->sgid_index;
9a443537	98	ah->av.vlan = cpu_to_le16(vlan_tag);
	99	dev_dbg(dev, "gid_index = 0x%x,vlan = 0x%x\n", ah->av.gid_index,
	100	ah->av.vlan);
	101
d8966fcd	102	if (rdma_ah_get_static_rate(ah_attr))
9a443537	103	ah->av.stat_rate = IB_RATE_10_GBPS;
9a443537	104
d8966fcd DC	105	memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
d8966fcd DC	106	ah->av.sl_tclass_flowlabel = cpu_to_le32(rdma_ah_get_sl(ah_attr) <<
9a443537	107	HNS_ROCE_SL_SHIFT);
	108
	109	return &ah->ibah;
	110	}
	111
90898850	112	int hns_roce_query_ah(struct ib_ah ibah, struct rdma_ah_attr ah_attr)
9a443537	113	{
	114	struct hns_roce_ah *ah = to_hr_ah(ibah);
	115
	116	memset(ah_attr, 0, sizeof(*ah_attr));
	117
d8966fcd DC	118	rdma_ah_set_sl(ah_attr, (le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
	119	HNS_ROCE_SL_SHIFT));
	120	rdma_ah_set_port_num(ah_attr, (le32_to_cpu(ah->av.port_pd) >>
	121	HNS_ROCE_PORT_NUM_SHIFT));
	122	rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
	123	rdma_ah_set_grh(ah_attr, NULL,
	124	(le32_to_cpu(ah->av.sl_tclass_flowlabel) &
	125	HNS_ROCE_FLOW_LABLE_MASK), ah->av.gid_index,
	126	ah->av.hop_limit,
	127	(le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
	128	HNS_ROCE_TCLASS_SHIFT));
	129	rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
9a443537	130
	131	return 0;
	132	}
	133
	134	int hns_roce_destroy_ah(struct ib_ah *ah)
	135	{
	136	kfree(to_hr_ah(ah));
	137
	138	return 0;
	139	}