[linux-2.6-block.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) 2008-2012 Emulex. All rights reserved.            *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.emulex.com                                                  *
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
 *
 * 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 "ocrdma.h"
#include "ocrdma_verbs.h"
#include "ocrdma_ah.h"
#include "ocrdma_hw.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, int pdid)
{
	int status = 0;
	u16 vlan_tag; bool vlan_enabled = false;
	struct ocrdma_eth_vlan eth;
	struct ocrdma_grh grh;
	int eth_sz;

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

	ah->sgid_index = attr->grh.sgid_index;

	vlan_tag = attr->vlan_id;
	if (!vlan_tag || (vlan_tag > 0xFFF))
		vlan_tag = dev->pvid;
	if (vlan_tag && (vlan_tag < 0x1000)) {
		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);
		vlan_enabled = true;
	} else {
		eth.eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE);
		eth_sz = sizeof(struct ocrdma_eth_basic);
	}
	memcpy(&eth.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
	memcpy(&eth.dmac[0], attr->dmac, ETH_ALEN);
	status = ocrdma_resolve_dmac(dev, attr, &eth.dmac[0]);
	if (status)
		return status;
	status = ocrdma_query_gid(&dev->ibdev, 1, attr->grh.sgid_index,
			(union ib_gid *)&grh.sgid[0]);
	if (status)
		return status;

	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);

	memcpy(&grh.dgid[0], attr->grh.dgid.raw, sizeof(attr->grh.dgid.raw));
	memcpy(&ah->av->eth_hdr, &eth, eth_sz);
	memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));
	if (vlan_enabled)
		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;
	int status;
	struct ocrdma_ah *ah;
	struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
	struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);

	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 = set_av_attr(dev, ah, attr, pd->id);
	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 = ah->id;
	}
	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 & Bit(1)) {
		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,
		       struct ib_wc *in_wc,
		       struct ib_grh *in_grh,
		       struct ib_mad *in_mad, struct ib_mad *out_mad)
{
	return IB_MAD_RESULT_SUCCESS;
}
Commit	Line	Data
fe2caefc PP	1	/*******************************************************************
	2	* This file is part of the Emulex RoCE Device Driver for *
	3	* RoCE (RDMA over Converged Ethernet) adapters. *
	4	* Copyright (C) 2008-2012 Emulex. All rights reserved. *
	5	* EMULEX and SLI are trademarks of Emulex. *
	6	* www.emulex.com *
	7	* *
	8	* This program is free software; you can redistribute it and/or *
	9	* modify it under the terms of version 2 of the GNU General *
	10	* Public License as published by the Free Software Foundation. *
	11	* This program is distributed in the hope that it will be useful. *
	12	* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
	13	* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
	14	* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
	15	* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
	16	* TO BE LEGALLY INVALID. See the GNU General Public License for *
	17	* more details, a copy of which can be found in the file COPYING *
	18	* included with this package. *
	19	*
	20	* Contact Information:
	21	* linux-drivers@emulex.com
	22	*
	23	* Emulex
	24	* 3333 Susan Street
	25	* Costa Mesa, CA 92626
	26	*******************************************************************/
	27
	28	#include <net/neighbour.h>
	29	#include <net/netevent.h>
	30
	31	#include <rdma/ib_addr.h>
fe2caefc PP	32
	33	#include "ocrdma.h"
	34	#include "ocrdma_verbs.h"
	35	#include "ocrdma_ah.h"
	36	#include "ocrdma_hw.h"
	37
0ea87262 DS	38	#define OCRDMA_VID_PCP_SHIFT 0xD
0ea87262 DS	39
1afc0454	40	static inline int set_av_attr(struct ocrdma_dev dev, struct ocrdma_ah ah,
fe2caefc PP	41	struct ib_ah_attr *attr, int pdid)
	42	{
	43	int status = 0;
	44	u16 vlan_tag; bool vlan_enabled = false;
fe2caefc PP	45	struct ocrdma_eth_vlan eth;
	46	struct ocrdma_grh grh;
	47	int eth_sz;
	48
	49	memset(&eth, 0, sizeof(eth));
	50	memset(&grh, 0, sizeof(grh));
	51
	52	ah->sgid_index = attr->grh.sgid_index;
	53
40aca6ff	54	vlan_tag = attr->vlan_id;
84b105db NG	55	if (!vlan_tag \|\| (vlan_tag > 0xFFF))
84b105db NG	56	vlan_tag = dev->pvid;
fe2caefc PP	57	if (vlan_tag && (vlan_tag < 0x1000)) {
	58	eth.eth_type = cpu_to_be16(0x8100);
	59	eth.roce_eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE);
0ea87262	60	vlan_tag \|= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;
fe2caefc PP	61	eth.vlan_tag = cpu_to_be16(vlan_tag);
	62	eth_sz = sizeof(struct ocrdma_eth_vlan);
	63	vlan_enabled = true;
	64	} else {
	65	eth.eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE);
	66	eth_sz = sizeof(struct ocrdma_eth_basic);
	67	}
	68	memcpy(&eth.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
40aca6ff MS	69	memcpy(&eth.dmac[0], attr->dmac, ETH_ALEN);
40aca6ff MS	70	status = ocrdma_resolve_dmac(dev, attr, &eth.dmac[0]);
fe2caefc PP	71	if (status)
	72	return status;
	73	status = ocrdma_query_gid(&dev->ibdev, 1, attr->grh.sgid_index,
	74	(union ib_gid *)&grh.sgid[0]);
	75	if (status)
	76	return status;
	77
	78	grh.tclass_flow = cpu_to_be32((6 << 28) \|
	79	(attr->grh.traffic_class << 24) \|
	80	attr->grh.flow_label);
	81	/* 0x1b is next header value in GRH */
	82	grh.pdid_hoplimit = cpu_to_be32((pdid << 16) \|
	83	(0x1b << 8) \| attr->grh.hop_limit);
	84
	85	memcpy(&grh.dgid[0], attr->grh.dgid.raw, sizeof(attr->grh.dgid.raw));
	86	memcpy(&ah->av->eth_hdr, &eth, eth_sz);
	87	memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));
	88	if (vlan_enabled)
	89	ah->av->valid \|= OCRDMA_AV_VLAN_VALID;
fe5e8a1a	90	ah->av->valid = cpu_to_le32(ah->av->valid);
fe2caefc PP	91	return status;
	92	}
	93
	94	struct ib_ah ocrdma_create_ah(struct ib_pd ibpd, struct ib_ah_attr *attr)
	95	{
	96	u32 *ahid_addr;
	97	int status;
	98	struct ocrdma_ah *ah;
	99	struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
f99b1649	100	struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
fe2caefc PP	101
	102	if (!(attr->ah_flags & IB_AH_GRH))
	103	return ERR_PTR(-EINVAL);
	104
31dbdd9a SX	105	if (atomic_cmpxchg(&dev->update_sl, 1, 0))
31dbdd9a SX	106	ocrdma_init_service_level(dev);
fad51b7d	107	ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
fe2caefc PP	108	if (!ah)
fe2caefc PP	109	return ERR_PTR(-ENOMEM);
fe2caefc PP	110
	111	status = ocrdma_alloc_av(dev, ah);
	112	if (status)
	113	goto av_err;
1afc0454	114	status = set_av_attr(dev, ah, attr, pd->id);
fe2caefc PP	115	if (status)
	116	goto av_conf_err;
	117
	118	/* if pd is for the user process, pass the ah_id to user space */
	119	if ((pd->uctx) && (pd->uctx->ah_tbl.va)) {
	120	ahid_addr = pd->uctx->ah_tbl.va + attr->dlid;
	121	*ahid_addr = ah->id;
	122	}
	123	return &ah->ibah;
	124
	125	av_conf_err:
	126	ocrdma_free_av(dev, ah);
	127	av_err:
	128	kfree(ah);
	129	return ERR_PTR(status);
	130	}
	131
	132	int ocrdma_destroy_ah(struct ib_ah *ibah)
	133	{
	134	struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
1afc0454 NG	135	struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);
	136
	137	ocrdma_free_av(dev, ah);
fe2caefc PP	138	kfree(ah);
	139	return 0;
	140	}
	141
	142	int ocrdma_query_ah(struct ib_ah ibah, struct ib_ah_attr attr)
	143	{
	144	struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
	145	struct ocrdma_av *av = ah->av;
	146	struct ocrdma_grh *grh;
	147	attr->ah_flags \|= IB_AH_GRH;
	148	if (ah->av->valid & Bit(1)) {
	149	grh = (struct ocrdma_grh )((u8 )ah->av +
	150	sizeof(struct ocrdma_eth_vlan));
	151	attr->sl = be16_to_cpu(av->eth_hdr.vlan_tag) >> 13;
	152	} else {
	153	grh = (struct ocrdma_grh )((u8 )ah->av +
	154	sizeof(struct ocrdma_eth_basic));
	155	attr->sl = 0;
	156	}
	157	memcpy(&attr->grh.dgid.raw[0], &grh->dgid[0], sizeof(grh->dgid));
	158	attr->grh.sgid_index = ah->sgid_index;
	159	attr->grh.hop_limit = be32_to_cpu(grh->pdid_hoplimit) & 0xff;
	160	attr->grh.traffic_class = be32_to_cpu(grh->tclass_flow) >> 24;
	161	attr->grh.flow_label = be32_to_cpu(grh->tclass_flow) & 0x00ffffffff;
	162	return 0;
	163	}
	164
	165	int ocrdma_modify_ah(struct ib_ah ibah, struct ib_ah_attr attr)
	166	{
	167	/* modify_ah is unsupported */
	168	return -ENOSYS;
	169	}
	170
	171	int ocrdma_process_mad(struct ib_device *ibdev,
	172	int process_mad_flags,
	173	u8 port_num,
	174	struct ib_wc *in_wc,
	175	struct ib_grh *in_grh,
	176	struct ib_mad in_mad, struct ib_mad out_mad)
	177	{
	178	return IB_MAD_RESULT_SUCCESS;
	179	}