[mirror_ubuntu-zesty-kernel.git] / drivers / infiniband / hw / ocrdma / ocrdma_ah.c

/* This file is part of the Emulex RoCE Device Driver for
 * RoCE (RDMA over Converged Ethernet) adapters.
 * Copyright (C) 2012-2015 Emulex. All rights reserved.
 * EMULEX and SLI are trademarks of Emulex.
 * www.emulex.com
 *
 * 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 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Contact Information:
 * linux-drivers@emulex.com
 *
 * Emulex
 * 3333 Susan Street
 * Costa Mesa, CA 92626
 */

#include <net/neighbour.h>
#include <net/netevent.h>

#include <rdma/ib_addr.h>
#include <rdma/ib_mad.h>

#include "ocrdma.h"
#include "ocrdma_verbs.h"
#include "ocrdma_ah.h"
#include "ocrdma_hw.h"
#include "ocrdma_stats.h"

#define OCRDMA_VID_PCP_SHIFT	0xD

static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
			struct ib_ah_attr *attr, union ib_gid *sgid,
			int pdid, bool *isvlan)
{
	int status = 0;
	u16 vlan_tag;
	struct ocrdma_eth_vlan eth;
	struct ocrdma_grh grh;
	int eth_sz;

	memset(&eth, 0, sizeof(eth));
	memset(&grh, 0, sizeof(grh));

	/* VLAN */
	vlan_tag = attr->vlan_id;
	if (!vlan_tag || (vlan_tag > 0xFFF))
		vlan_tag = dev->pvid;
	if (vlan_tag || dev->pfc_state) {
		if (!vlan_tag) {
			pr_err("ocrdma%d:Using VLAN with PFC is recommended\n",
				dev->id);
			pr_err("ocrdma%d:Using VLAN 0 for this connection\n",
				dev->id);
		}
		eth.eth_type = cpu_to_be16(0x8100);
		eth.roce_eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE);
		vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;
		eth.vlan_tag = cpu_to_be16(vlan_tag);
		eth_sz = sizeof(struct ocrdma_eth_vlan);
		*isvlan = true;
	} else {
		eth.eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE);
		eth_sz = sizeof(struct ocrdma_eth_basic);
	}
	/* MAC */
	memcpy(&eth.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
	status = ocrdma_resolve_dmac(dev, attr, &eth.dmac[0]);
	if (status)
		return status;
	ah->sgid_index = attr->grh.sgid_index;
	memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid));
	memcpy(&grh.dgid[0], attr->grh.dgid.raw, sizeof(attr->grh.dgid.raw));

	grh.tclass_flow = cpu_to_be32((6 << 28) |
			(attr->grh.traffic_class << 24) |
			attr->grh.flow_label);
	/* 0x1b is next header value in GRH */
	grh.pdid_hoplimit = cpu_to_be32((pdid << 16) |
			(0x1b << 8) | attr->grh.hop_limit);
	/* Eth HDR */
	memcpy(&ah->av->eth_hdr, &eth, eth_sz);
	memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));
	if (*isvlan)
		ah->av->valid |= OCRDMA_AV_VLAN_VALID;
	ah->av->valid = cpu_to_le32(ah->av->valid);
	return status;
}

struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr)
{
	u32 *ahid_addr;
	bool isvlan = false;
	int status;
	struct ocrdma_ah *ah;
	struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
	struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
	union ib_gid sgid;

	if (!(attr->ah_flags & IB_AH_GRH))
		return ERR_PTR(-EINVAL);

	if (atomic_cmpxchg(&dev->update_sl, 1, 0))
		ocrdma_init_service_level(dev);
	ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
	if (!ah)
		return ERR_PTR(-ENOMEM);

	status = ocrdma_alloc_av(dev, ah);
	if (status)
		goto av_err;

	status = ocrdma_query_gid(&dev->ibdev, 1, attr->grh.sgid_index, &sgid);
	if (status) {
		pr_err("%s(): Failed to query sgid, status = %d\n",
		      __func__, status);
		goto av_conf_err;
	}

	if ((pd->uctx) &&
	    (!rdma_is_multicast_addr((struct in6_addr *)attr->grh.dgid.raw)) &&
	    (!rdma_link_local_addr((struct in6_addr *)attr->grh.dgid.raw))) {
		status = rdma_addr_find_dmac_by_grh(&sgid, &attr->grh.dgid,
                                        attr->dmac, &attr->vlan_id);
		if (status) {
			pr_err("%s(): Failed to resolve dmac from gid." 
				"status = %d\n", __func__, status);
			goto av_conf_err;
		}
	}

	status = set_av_attr(dev, ah, attr, &sgid, pd->id, &isvlan);
	if (status)
		goto av_conf_err;

	/* if pd is for the user process, pass the ah_id to user space */
	if ((pd->uctx) && (pd->uctx->ah_tbl.va)) {
		ahid_addr = pd->uctx->ah_tbl.va + attr->dlid;
		*ahid_addr = 0;
		*ahid_addr |= ah->id & OCRDMA_AH_ID_MASK;
		if (isvlan)
			*ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK <<
				       OCRDMA_AH_VLAN_VALID_SHIFT);
	}

	return &ah->ibah;

av_conf_err:
	ocrdma_free_av(dev, ah);
av_err:
	kfree(ah);
	return ERR_PTR(status);
}

int ocrdma_destroy_ah(struct ib_ah *ibah)
{
	struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
	struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);

	ocrdma_free_av(dev, ah);
	kfree(ah);
	return 0;
}

int ocrdma_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
{
	struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
	struct ocrdma_av *av = ah->av;
	struct ocrdma_grh *grh;
	attr->ah_flags |= IB_AH_GRH;
	if (ah->av->valid & OCRDMA_AV_VALID) {
		grh = (struct ocrdma_grh *)((u8 *)ah->av +
				sizeof(struct ocrdma_eth_vlan));
		attr->sl = be16_to_cpu(av->eth_hdr.vlan_tag) >> 13;
	} else {
		grh = (struct ocrdma_grh *)((u8 *)ah->av +
					sizeof(struct ocrdma_eth_basic));
		attr->sl = 0;
	}
	memcpy(&attr->grh.dgid.raw[0], &grh->dgid[0], sizeof(grh->dgid));
	attr->grh.sgid_index = ah->sgid_index;
	attr->grh.hop_limit = be32_to_cpu(grh->pdid_hoplimit) & 0xff;
	attr->grh.traffic_class = be32_to_cpu(grh->tclass_flow) >> 24;
	attr->grh.flow_label = be32_to_cpu(grh->tclass_flow) & 0x00ffffffff;
	return 0;
}

int ocrdma_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
{
	/* modify_ah is unsupported */
	return -ENOSYS;
}

int ocrdma_process_mad(struct ib_device *ibdev,
		       int process_mad_flags,
		       u8 port_num,
		       const struct ib_wc *in_wc,
		       const struct ib_grh *in_grh,
		       const struct ib_mad_hdr *in, size_t in_mad_size,
		       struct ib_mad_hdr *out, size_t *out_mad_size,
		       u16 *out_mad_pkey_index)
{
	int status;
	struct ocrdma_dev *dev;
	const struct ib_mad *in_mad = (const struct ib_mad *)in;
	struct ib_mad *out_mad = (struct ib_mad *)out;

	if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
			 *out_mad_size != sizeof(*out_mad)))
		return IB_MAD_RESULT_FAILURE;

	switch (in_mad->mad_hdr.mgmt_class) {
	case IB_MGMT_CLASS_PERF_MGMT:
		dev = get_ocrdma_dev(ibdev);
		if (!ocrdma_pma_counters(dev, out_mad))
			status = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
		else
			status = IB_MAD_RESULT_SUCCESS;
		break;
	default:
		status = IB_MAD_RESULT_SUCCESS;
		break;
	}
	return status;
}
Commit	Line	Data
71ee6730 DS	1	/* This file is part of the Emulex RoCE Device Driver for
	2	* RoCE (RDMA over Converged Ethernet) adapters.
	3	* Copyright (C) 2012-2015 Emulex. All rights reserved.
	4	* EMULEX and SLI are trademarks of Emulex.
	5	* www.emulex.com
	6	*
	7	* This software is available to you under a choice of one of two licenses.
	8	* You may choose to be licensed under the terms of the GNU General Public
	9	* License (GPL) Version 2, available from the file COPYING in the main
	10	* directory of this source tree, or the BSD license below:
	11	*
	12	* Redistribution and use in source and binary forms, with or without
	13	* modification, are permitted provided that the following conditions
	14	* are met:
	15	*
	16	* - Redistributions of source code must retain the above copyright notice,
	17	* this list of conditions and the following disclaimer.
	18	*
	19	* - Redistributions in binary form must reproduce the above copyright
	20	* notice, this list of conditions and the following disclaimer in
	21	* the documentation and/or other materials provided with the distribution.
	22	*
	23	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	24	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
	25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	26	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
	27	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	28	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	29	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
	30	* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
	31	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
	32	* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
	33	* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
fe2caefc PP	34	*
	35	* Contact Information:
	36	* linux-drivers@emulex.com
	37	*
	38	* Emulex
	39	* 3333 Susan Street
	40	* Costa Mesa, CA 92626
71ee6730	41	*/
fe2caefc PP	42
	43	#include <net/neighbour.h>
	44	#include <net/netevent.h>
	45
	46	#include <rdma/ib_addr.h>
cad1fbb0	47	#include <rdma/ib_mad.h>
fe2caefc PP	48
	49	#include "ocrdma.h"
	50	#include "ocrdma_verbs.h"
	51	#include "ocrdma_ah.h"
	52	#include "ocrdma_hw.h"
cad1fbb0	53	#include "ocrdma_stats.h"
fe2caefc	54
0ea87262 DS	55	#define OCRDMA_VID_PCP_SHIFT 0xD
0ea87262 DS	56
1afc0454	57	static inline int set_av_attr(struct ocrdma_dev dev, struct ocrdma_ah ah,
29565f2f DS	58	struct ib_ah_attr attr, union ib_gid sgid,
29565f2f DS	59	int pdid, bool *isvlan)
fe2caefc PP	60	{
fe2caefc PP	61	int status = 0;
29565f2f	62	u16 vlan_tag;
fe2caefc PP	63	struct ocrdma_eth_vlan eth;
	64	struct ocrdma_grh grh;
	65	int eth_sz;
	66
	67	memset(&eth, 0, sizeof(eth));
	68	memset(&grh, 0, sizeof(grh));
	69
1be528bc	70	/* VLAN */
40aca6ff	71	vlan_tag = attr->vlan_id;
84b105db NG	72	if (!vlan_tag \|\| (vlan_tag > 0xFFF))
84b105db NG	73	vlan_tag = dev->pvid;
6f5deab0 DS	74	if (vlan_tag \|\| dev->pfc_state) {
	75	if (!vlan_tag) {
	76	pr_err("ocrdma%d:Using VLAN with PFC is recommended\n",
	77	dev->id);
	78	pr_err("ocrdma%d:Using VLAN 0 for this connection\n",
	79	dev->id);
	80	}
fe2caefc PP	81	eth.eth_type = cpu_to_be16(0x8100);
fe2caefc PP	82	eth.roce_eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE);
0ea87262	83	vlan_tag \|= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;
fe2caefc PP	84	eth.vlan_tag = cpu_to_be16(vlan_tag);
fe2caefc PP	85	eth_sz = sizeof(struct ocrdma_eth_vlan);
29565f2f	86	*isvlan = true;
fe2caefc PP	87	} else {
	88	eth.eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE);
	89	eth_sz = sizeof(struct ocrdma_eth_basic);
	90	}
1be528bc	91	/* MAC */
fe2caefc	92	memcpy(&eth.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
40aca6ff	93	status = ocrdma_resolve_dmac(dev, attr, &eth.dmac[0]);
fe2caefc PP	94	if (status)
fe2caefc PP	95	return status;
1be528bc	96	ah->sgid_index = attr->grh.sgid_index;
	97	memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid));
	98	memcpy(&grh.dgid[0], attr->grh.dgid.raw, sizeof(attr->grh.dgid.raw));
fe2caefc PP	99
	100	grh.tclass_flow = cpu_to_be32((6 << 28) \|
	101	(attr->grh.traffic_class << 24) \|
	102	attr->grh.flow_label);
	103	/* 0x1b is next header value in GRH */
	104	grh.pdid_hoplimit = cpu_to_be32((pdid << 16) \|
	105	(0x1b << 8) \| attr->grh.hop_limit);
1be528bc	106	/* Eth HDR */
fe2caefc PP	107	memcpy(&ah->av->eth_hdr, &eth, eth_sz);
fe2caefc PP	108	memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));
29565f2f	109	if (*isvlan)
fe2caefc	110	ah->av->valid \|= OCRDMA_AV_VLAN_VALID;
fe5e8a1a	111	ah->av->valid = cpu_to_le32(ah->av->valid);
fe2caefc PP	112	return status;
	113	}
	114
	115	struct ib_ah ocrdma_create_ah(struct ib_pd ibpd, struct ib_ah_attr *attr)
	116	{
	117	u32 *ahid_addr;
29565f2f	118	bool isvlan = false;
fe2caefc PP	119	int status;
	120	struct ocrdma_ah *ah;
	121	struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
f99b1649	122	struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
1be528bc	123	union ib_gid sgid;
fe2caefc PP	124
	125	if (!(attr->ah_flags & IB_AH_GRH))
	126	return ERR_PTR(-EINVAL);
	127
31dbdd9a SX	128	if (atomic_cmpxchg(&dev->update_sl, 1, 0))
31dbdd9a SX	129	ocrdma_init_service_level(dev);
fad51b7d	130	ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
fe2caefc PP	131	if (!ah)
fe2caefc PP	132	return ERR_PTR(-ENOMEM);
fe2caefc PP	133
	134	status = ocrdma_alloc_av(dev, ah);
	135	if (status)
	136	goto av_err;
1be528bc	137
	138	status = ocrdma_query_gid(&dev->ibdev, 1, attr->grh.sgid_index, &sgid);
	139	if (status) {
	140	pr_err("%s(): Failed to query sgid, status = %d\n",
	141	__func__, status);
	142	goto av_conf_err;
	143	}
	144
d27b2f15 MA	145	if ((pd->uctx) &&
	146	(!rdma_is_multicast_addr((struct in6_addr *)attr->grh.dgid.raw)) &&
	147	(!rdma_link_local_addr((struct in6_addr *)attr->grh.dgid.raw))) {
1be528bc	148	status = rdma_addr_find_dmac_by_grh(&sgid, &attr->grh.dgid,
	149	attr->dmac, &attr->vlan_id);
	150	if (status) {
	151	pr_err("%s(): Failed to resolve dmac from gid."
	152	"status = %d\n", __func__, status);
	153	goto av_conf_err;
	154	}
	155	}
	156
29565f2f	157	status = set_av_attr(dev, ah, attr, &sgid, pd->id, &isvlan);
fe2caefc PP	158	if (status)
	159	goto av_conf_err;
	160
	161	/* if pd is for the user process, pass the ah_id to user space */
	162	if ((pd->uctx) && (pd->uctx->ah_tbl.va)) {
	163	ahid_addr = pd->uctx->ah_tbl.va + attr->dlid;
29565f2f DS	164	*ahid_addr = 0;
	165	*ahid_addr \|= ah->id & OCRDMA_AH_ID_MASK;
	166	if (isvlan)
	167	*ahid_addr \|= (OCRDMA_AH_VLAN_VALID_MASK <<
	168	OCRDMA_AH_VLAN_VALID_SHIFT);
fe2caefc	169	}
29565f2f	170
fe2caefc PP	171	return &ah->ibah;
	172
	173	av_conf_err:
	174	ocrdma_free_av(dev, ah);
	175	av_err:
	176	kfree(ah);
	177	return ERR_PTR(status);
	178	}
	179
	180	int ocrdma_destroy_ah(struct ib_ah *ibah)
	181	{
	182	struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
1afc0454 NG	183	struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);
	184
	185	ocrdma_free_av(dev, ah);
fe2caefc PP	186	kfree(ah);
	187	return 0;
	188	}
	189
	190	int ocrdma_query_ah(struct ib_ah ibah, struct ib_ah_attr attr)
	191	{
	192	struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
	193	struct ocrdma_av *av = ah->av;
	194	struct ocrdma_grh *grh;
	195	attr->ah_flags \|= IB_AH_GRH;
f0c2c225	196	if (ah->av->valid & OCRDMA_AV_VALID) {
fe2caefc PP	197	grh = (struct ocrdma_grh )((u8 )ah->av +
	198	sizeof(struct ocrdma_eth_vlan));
	199	attr->sl = be16_to_cpu(av->eth_hdr.vlan_tag) >> 13;
	200	} else {
	201	grh = (struct ocrdma_grh )((u8 )ah->av +
	202	sizeof(struct ocrdma_eth_basic));
	203	attr->sl = 0;
	204	}
	205	memcpy(&attr->grh.dgid.raw[0], &grh->dgid[0], sizeof(grh->dgid));
	206	attr->grh.sgid_index = ah->sgid_index;
	207	attr->grh.hop_limit = be32_to_cpu(grh->pdid_hoplimit) & 0xff;
	208	attr->grh.traffic_class = be32_to_cpu(grh->tclass_flow) >> 24;
	209	attr->grh.flow_label = be32_to_cpu(grh->tclass_flow) & 0x00ffffffff;
	210	return 0;
	211	}
	212
	213	int ocrdma_modify_ah(struct ib_ah ibah, struct ib_ah_attr attr)
	214	{
	215	/* modify_ah is unsupported */
	216	return -ENOSYS;
	217	}
	218
	219	int ocrdma_process_mad(struct ib_device *ibdev,
	220	int process_mad_flags,
	221	u8 port_num,
a97e2d86 IW	222	const struct ib_wc *in_wc,
a97e2d86 IW	223	const struct ib_grh *in_grh,
4cd7c947 IW	224	const struct ib_mad_hdr *in, size_t in_mad_size,
	225	struct ib_mad_hdr out, size_t out_mad_size,
	226	u16 *out_mad_pkey_index)
fe2caefc	227	{
cad1fbb0 MA	228	int status;
cad1fbb0 MA	229	struct ocrdma_dev *dev;
4cd7c947 IW	230	const struct ib_mad in_mad = (const struct ib_mad )in;
	231	struct ib_mad out_mad = (struct ib_mad )out;
	232
3b8ab700 IW	233	if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) \|\|
	234	out_mad_size != sizeof(out_mad)))
	235	return IB_MAD_RESULT_FAILURE;
cad1fbb0 MA	236
	237	switch (in_mad->mad_hdr.mgmt_class) {
	238	case IB_MGMT_CLASS_PERF_MGMT:
	239	dev = get_ocrdma_dev(ibdev);
	240	if (!ocrdma_pma_counters(dev, out_mad))
	241	status = IB_MAD_RESULT_SUCCESS \| IB_MAD_RESULT_REPLY;
	242	else
	243	status = IB_MAD_RESULT_SUCCESS;
	244	break;
	245	default:
	246	status = IB_MAD_RESULT_SUCCESS;
	247	break;
	248	}
	249	return status;
fe2caefc	250	}