171ee6730SDevesh Sharma /* This file is part of the Emulex RoCE Device Driver for
271ee6730SDevesh Sharma * RoCE (RDMA over Converged Ethernet) adapters.
371ee6730SDevesh Sharma * Copyright (C) 2012-2015 Emulex. All rights reserved.
471ee6730SDevesh Sharma * EMULEX and SLI are trademarks of Emulex.
571ee6730SDevesh Sharma * www.emulex.com
671ee6730SDevesh Sharma *
771ee6730SDevesh Sharma * This software is available to you under a choice of one of two licenses.
871ee6730SDevesh Sharma * You may choose to be licensed under the terms of the GNU General Public
971ee6730SDevesh Sharma * License (GPL) Version 2, available from the file COPYING in the main
1071ee6730SDevesh Sharma * directory of this source tree, or the BSD license below:
1171ee6730SDevesh Sharma *
1271ee6730SDevesh Sharma * Redistribution and use in source and binary forms, with or without
1371ee6730SDevesh Sharma * modification, are permitted provided that the following conditions
1471ee6730SDevesh Sharma * are met:
1571ee6730SDevesh Sharma *
1671ee6730SDevesh Sharma * - Redistributions of source code must retain the above copyright notice,
1771ee6730SDevesh Sharma * this list of conditions and the following disclaimer.
1871ee6730SDevesh Sharma *
1971ee6730SDevesh Sharma * - Redistributions in binary form must reproduce the above copyright
2071ee6730SDevesh Sharma * notice, this list of conditions and the following disclaimer in
2171ee6730SDevesh Sharma * the documentation and/or other materials provided with the distribution.
2271ee6730SDevesh Sharma *
2371ee6730SDevesh Sharma * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
2471ee6730SDevesh Sharma * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
2571ee6730SDevesh Sharma * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2671ee6730SDevesh Sharma * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
2771ee6730SDevesh Sharma * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
2871ee6730SDevesh Sharma * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
2971ee6730SDevesh Sharma * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
3071ee6730SDevesh Sharma * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
3171ee6730SDevesh Sharma * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
3271ee6730SDevesh Sharma * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
3371ee6730SDevesh Sharma * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34fe2caefcSParav Pandit *
35fe2caefcSParav Pandit * Contact Information:
36fe2caefcSParav Pandit * linux-drivers@emulex.com
37fe2caefcSParav Pandit *
38fe2caefcSParav Pandit * Emulex
39fe2caefcSParav Pandit * 3333 Susan Street
40fe2caefcSParav Pandit * Costa Mesa, CA 92626
4171ee6730SDevesh Sharma */
42fe2caefcSParav Pandit
43fe2caefcSParav Pandit #include <net/neighbour.h>
44fe2caefcSParav Pandit #include <net/netevent.h>
45fe2caefcSParav Pandit
46fe2caefcSParav Pandit #include <rdma/ib_addr.h>
47cad1fbb0SMitesh Ahuja #include <rdma/ib_mad.h>
48dbf727deSMatan Barak #include <rdma/ib_cache.h>
49fe2caefcSParav Pandit
50fe2caefcSParav Pandit #include "ocrdma.h"
51fe2caefcSParav Pandit #include "ocrdma_verbs.h"
52fe2caefcSParav Pandit #include "ocrdma_ah.h"
53fe2caefcSParav Pandit #include "ocrdma_hw.h"
54cad1fbb0SMitesh Ahuja #include "ocrdma_stats.h"
55fe2caefcSParav Pandit
560ea87262SDevesh Sharma #define OCRDMA_VID_PCP_SHIFT 0xD
570ea87262SDevesh Sharma
ocrdma_hdr_type_to_proto_num(int devid,u8 hdr_type)586b062667SDevesh Sharma static u16 ocrdma_hdr_type_to_proto_num(int devid, u8 hdr_type)
596b062667SDevesh Sharma {
606b062667SDevesh Sharma switch (hdr_type) {
616b062667SDevesh Sharma case OCRDMA_L3_TYPE_IB_GRH:
6269ae5439SSelvin Xavier return (u16)ETH_P_IBOE;
636b062667SDevesh Sharma case OCRDMA_L3_TYPE_IPV4:
646b062667SDevesh Sharma return (u16)0x0800;
656b062667SDevesh Sharma case OCRDMA_L3_TYPE_IPV6:
666b062667SDevesh Sharma return (u16)0x86dd;
676b062667SDevesh Sharma default:
686b062667SDevesh Sharma pr_err("ocrdma%d: Invalid network header\n", devid);
696b062667SDevesh Sharma return 0;
706b062667SDevesh Sharma }
716b062667SDevesh Sharma }
726b062667SDevesh Sharma
set_av_attr(struct ocrdma_dev * dev,struct ocrdma_ah * ah,struct rdma_ah_attr * attr,const union ib_gid * sgid,int pdid,bool * isvlan,u16 vlan_tag)731afc0454SNaresh Gottumukkala static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
7447ec3866SParav Pandit struct rdma_ah_attr *attr, const union ib_gid *sgid,
75dbf727deSMatan Barak int pdid, bool *isvlan, u16 vlan_tag)
76fe2caefcSParav Pandit {
770ca4c39fSMarkus Elfring int status;
78fe2caefcSParav Pandit struct ocrdma_eth_vlan eth;
79fe2caefcSParav Pandit struct ocrdma_grh grh;
80fe2caefcSParav Pandit int eth_sz;
816b062667SDevesh Sharma u16 proto_num = 0;
826b062667SDevesh Sharma u8 nxthdr = 0x11;
836b062667SDevesh Sharma struct iphdr ipv4;
84d8966fcdSDasaratharaman Chandramouli const struct ib_global_route *ib_grh;
856b062667SDevesh Sharma union {
866b062667SDevesh Sharma struct sockaddr_in _sockaddr_in;
876b062667SDevesh Sharma struct sockaddr_in6 _sockaddr_in6;
886b062667SDevesh Sharma } sgid_addr, dgid_addr;
89fe2caefcSParav Pandit
90fe2caefcSParav Pandit memset(ð, 0, sizeof(eth));
91fe2caefcSParav Pandit memset(&grh, 0, sizeof(grh));
92fe2caefcSParav Pandit
936b062667SDevesh Sharma /* Protocol Number */
946b062667SDevesh Sharma proto_num = ocrdma_hdr_type_to_proto_num(dev->id, ah->hdr_type);
956b062667SDevesh Sharma if (!proto_num)
966b062667SDevesh Sharma return -EINVAL;
9769ae5439SSelvin Xavier nxthdr = (proto_num == ETH_P_IBOE) ? 0x1b : 0x11;
981be528bcSdevesh.sharma@emulex.com /* VLAN */
9984b105dbSNaresh Gottumukkala if (!vlan_tag || (vlan_tag > 0xFFF))
10084b105dbSNaresh Gottumukkala vlan_tag = dev->pvid;
1016f5deab0SDevesh Sharma if (vlan_tag || dev->pfc_state) {
1026f5deab0SDevesh Sharma if (!vlan_tag) {
1036f5deab0SDevesh Sharma pr_err("ocrdma%d:Using VLAN with PFC is recommended\n",
1046f5deab0SDevesh Sharma dev->id);
1056f5deab0SDevesh Sharma pr_err("ocrdma%d:Using VLAN 0 for this connection\n",
1066f5deab0SDevesh Sharma dev->id);
1076f5deab0SDevesh Sharma }
108fe2caefcSParav Pandit eth.eth_type = cpu_to_be16(0x8100);
1096b062667SDevesh Sharma eth.roce_eth_type = cpu_to_be16(proto_num);
1100ea87262SDevesh Sharma vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;
111fe2caefcSParav Pandit eth.vlan_tag = cpu_to_be16(vlan_tag);
112fe2caefcSParav Pandit eth_sz = sizeof(struct ocrdma_eth_vlan);
11329565f2fSDevesh Sharma *isvlan = true;
114fe2caefcSParav Pandit } else {
1156b062667SDevesh Sharma eth.eth_type = cpu_to_be16(proto_num);
116fe2caefcSParav Pandit eth_sz = sizeof(struct ocrdma_eth_basic);
117fe2caefcSParav Pandit }
1181be528bcSdevesh.sharma@emulex.com /* MAC */
119fe2caefcSParav Pandit memcpy(ð.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
12040aca6ffSMoni Shoua status = ocrdma_resolve_dmac(dev, attr, ð.dmac[0]);
121fe2caefcSParav Pandit if (status)
122fe2caefcSParav Pandit return status;
123d8966fcdSDasaratharaman Chandramouli ib_grh = rdma_ah_read_grh(attr);
124d8966fcdSDasaratharaman Chandramouli ah->sgid_index = ib_grh->sgid_index;
1256b062667SDevesh Sharma /* Eth HDR */
1266b062667SDevesh Sharma memcpy(&ah->av->eth_hdr, ð, eth_sz);
1276b062667SDevesh Sharma if (ah->hdr_type == RDMA_NETWORK_IPV4) {
1286b062667SDevesh Sharma *((__be16 *)&ipv4) = htons((4 << 12) | (5 << 8) |
129d8966fcdSDasaratharaman Chandramouli ib_grh->traffic_class);
1306b062667SDevesh Sharma ipv4.id = cpu_to_be16(pdid);
1316b062667SDevesh Sharma ipv4.frag_off = htons(IP_DF);
1326b062667SDevesh Sharma ipv4.tot_len = htons(0);
133d8966fcdSDasaratharaman Chandramouli ipv4.ttl = ib_grh->hop_limit;
1346b062667SDevesh Sharma ipv4.protocol = nxthdr;
135641114d2SJason Gunthorpe rdma_gid2ip((struct sockaddr *)&sgid_addr, sgid);
1366b062667SDevesh Sharma ipv4.saddr = sgid_addr._sockaddr_in.sin_addr.s_addr;
137641114d2SJason Gunthorpe rdma_gid2ip((struct sockaddr*)&dgid_addr, &ib_grh->dgid);
1386b062667SDevesh Sharma ipv4.daddr = dgid_addr._sockaddr_in.sin_addr.s_addr;
1396b062667SDevesh Sharma memcpy((u8 *)ah->av + eth_sz, &ipv4, sizeof(struct iphdr));
1406b062667SDevesh Sharma } else {
1411be528bcSdevesh.sharma@emulex.com memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid));
142fe2caefcSParav Pandit grh.tclass_flow = cpu_to_be32((6 << 28) |
143d8966fcdSDasaratharaman Chandramouli (ib_grh->traffic_class << 24) |
144d8966fcdSDasaratharaman Chandramouli ib_grh->flow_label);
145d8966fcdSDasaratharaman Chandramouli memcpy(&grh.dgid[0], ib_grh->dgid.raw,
146d8966fcdSDasaratharaman Chandramouli sizeof(ib_grh->dgid.raw));
147fe2caefcSParav Pandit grh.pdid_hoplimit = cpu_to_be32((pdid << 16) |
1486b062667SDevesh Sharma (nxthdr << 8) |
149d8966fcdSDasaratharaman Chandramouli ib_grh->hop_limit);
150fe2caefcSParav Pandit memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));
1516b062667SDevesh Sharma }
15229565f2fSDevesh Sharma if (*isvlan)
153fe2caefcSParav Pandit ah->av->valid |= OCRDMA_AV_VLAN_VALID;
154fe5e8a1aSDevesh Sharma ah->av->valid = cpu_to_le32(ah->av->valid);
155fe2caefcSParav Pandit return status;
156fe2caefcSParav Pandit }
157fe2caefcSParav Pandit
ocrdma_create_ah(struct ib_ah * ibah,struct rdma_ah_init_attr * init_attr,struct ib_udata * udata)158fa5d010cSMaor Gottlieb int ocrdma_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
159d3456914SLeon Romanovsky struct ib_udata *udata)
160fe2caefcSParav Pandit {
161fe2caefcSParav Pandit u32 *ahid_addr;
162fe2caefcSParav Pandit int status;
163d3456914SLeon Romanovsky struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
164dbf727deSMatan Barak bool isvlan = false;
165dbf727deSMatan Barak u16 vlan_tag = 0xffff;
16647ec3866SParav Pandit const struct ib_gid_attr *sgid_attr;
167d3456914SLeon Romanovsky struct ocrdma_pd *pd = get_ocrdma_pd(ibah->pd);
168fa5d010cSMaor Gottlieb struct rdma_ah_attr *attr = init_attr->ah_attr;
169d3456914SLeon Romanovsky struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);
170fe2caefcSParav Pandit
17144c58487SDasaratharaman Chandramouli if ((attr->type != RDMA_AH_ATTR_TYPE_ROCE) ||
17244c58487SDasaratharaman Chandramouli !(rdma_ah_get_ah_flags(attr) & IB_AH_GRH))
173d3456914SLeon Romanovsky return -EINVAL;
174fe2caefcSParav Pandit
17531dbdd9aSSelvin Xavier if (atomic_cmpxchg(&dev->update_sl, 1, 0))
17631dbdd9aSSelvin Xavier ocrdma_init_service_level(dev);
1776b062667SDevesh Sharma
178a70c0739SParav Pandit sgid_attr = attr->grh.sgid_attr;
179a70c0739SParav Pandit status = rdma_read_gid_l2_fields(sgid_attr, &vlan_tag, NULL);
180a70c0739SParav Pandit if (status)
181a70c0739SParav Pandit return status;
182a70c0739SParav Pandit
183fe2caefcSParav Pandit status = ocrdma_alloc_av(dev, ah);
184fe2caefcSParav Pandit if (status)
185fe2caefcSParav Pandit goto av_err;
1861be528bcSdevesh.sharma@emulex.com
18747ec3866SParav Pandit /* Get network header type for this GID */
18847ec3866SParav Pandit ah->hdr_type = rdma_gid_attr_network_type(sgid_attr);
18947ec3866SParav Pandit
19047ec3866SParav Pandit status = set_av_attr(dev, ah, attr, &sgid_attr->gid, pd->id,
19147ec3866SParav Pandit &isvlan, vlan_tag);
192fe2caefcSParav Pandit if (status)
193fe2caefcSParav Pandit goto av_conf_err;
194fe2caefcSParav Pandit
195fe2caefcSParav Pandit /* if pd is for the user process, pass the ah_id to user space */
196fe2caefcSParav Pandit if ((pd->uctx) && (pd->uctx->ah_tbl.va)) {
197d8966fcdSDasaratharaman Chandramouli ahid_addr = pd->uctx->ah_tbl.va + rdma_ah_get_dlid(attr);
19829565f2fSDevesh Sharma *ahid_addr = 0;
19929565f2fSDevesh Sharma *ahid_addr |= ah->id & OCRDMA_AH_ID_MASK;
200834d16d6SDevesh Sharma if (ocrdma_is_udp_encap_supported(dev)) {
201834d16d6SDevesh Sharma *ahid_addr |= ((u32)ah->hdr_type &
202834d16d6SDevesh Sharma OCRDMA_AH_L3_TYPE_MASK) <<
203834d16d6SDevesh Sharma OCRDMA_AH_L3_TYPE_SHIFT;
204834d16d6SDevesh Sharma }
20529565f2fSDevesh Sharma if (isvlan)
20629565f2fSDevesh Sharma *ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK <<
20729565f2fSDevesh Sharma OCRDMA_AH_VLAN_VALID_SHIFT);
208fe2caefcSParav Pandit }
20929565f2fSDevesh Sharma
210d3456914SLeon Romanovsky return 0;
211fe2caefcSParav Pandit
212fe2caefcSParav Pandit av_conf_err:
213fe2caefcSParav Pandit ocrdma_free_av(dev, ah);
214fe2caefcSParav Pandit av_err:
215d3456914SLeon Romanovsky return status;
216fe2caefcSParav Pandit }
217fe2caefcSParav Pandit
ocrdma_destroy_ah(struct ib_ah * ibah,u32 flags)2189a9ebf8cSLeon Romanovsky int ocrdma_destroy_ah(struct ib_ah *ibah, u32 flags)
219fe2caefcSParav Pandit {
220fe2caefcSParav Pandit struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
2211afc0454SNaresh Gottumukkala struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);
2221afc0454SNaresh Gottumukkala
2231afc0454SNaresh Gottumukkala ocrdma_free_av(dev, ah);
2249a9ebf8cSLeon Romanovsky return 0;
225fe2caefcSParav Pandit }
226fe2caefcSParav Pandit
ocrdma_query_ah(struct ib_ah * ibah,struct rdma_ah_attr * attr)22790898850SDasaratharaman Chandramouli int ocrdma_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
228fe2caefcSParav Pandit {
229fe2caefcSParav Pandit struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
230fe2caefcSParav Pandit struct ocrdma_av *av = ah->av;
231fe2caefcSParav Pandit struct ocrdma_grh *grh;
232d8966fcdSDasaratharaman Chandramouli
23344c58487SDasaratharaman Chandramouli attr->type = ibah->type;
234f0c2c225Sdevesh.sharma@emulex.com if (ah->av->valid & OCRDMA_AV_VALID) {
235fe2caefcSParav Pandit grh = (struct ocrdma_grh *)((u8 *)ah->av +
236fe2caefcSParav Pandit sizeof(struct ocrdma_eth_vlan));
237d8966fcdSDasaratharaman Chandramouli rdma_ah_set_sl(attr, be16_to_cpu(av->eth_hdr.vlan_tag) >> 13);
238fe2caefcSParav Pandit } else {
239fe2caefcSParav Pandit grh = (struct ocrdma_grh *)((u8 *)ah->av +
240fe2caefcSParav Pandit sizeof(struct ocrdma_eth_basic));
241d8966fcdSDasaratharaman Chandramouli rdma_ah_set_sl(attr, 0);
242fe2caefcSParav Pandit }
243d8966fcdSDasaratharaman Chandramouli rdma_ah_set_grh(attr, NULL,
244d8966fcdSDasaratharaman Chandramouli be32_to_cpu(grh->tclass_flow) & 0xffffffff,
245d8966fcdSDasaratharaman Chandramouli ah->sgid_index,
246d8966fcdSDasaratharaman Chandramouli be32_to_cpu(grh->pdid_hoplimit) & 0xff,
247d8966fcdSDasaratharaman Chandramouli be32_to_cpu(grh->tclass_flow) >> 24);
248d8966fcdSDasaratharaman Chandramouli rdma_ah_set_dgid_raw(attr, &grh->dgid[0]);
249fe2caefcSParav Pandit return 0;
250fe2caefcSParav Pandit }
251fe2caefcSParav Pandit
ocrdma_process_mad(struct ib_device * ibdev,int process_mad_flags,u32 port_num,const struct ib_wc * in_wc,const struct ib_grh * in_grh,const struct ib_mad * in,struct ib_mad * out,size_t * out_mad_size,u16 * out_mad_pkey_index)252e26e7b88SLeon Romanovsky int ocrdma_process_mad(struct ib_device *ibdev, int process_mad_flags,
253*1fb7f897SMark Bloch u32 port_num, const struct ib_wc *in_wc,
254e26e7b88SLeon Romanovsky const struct ib_grh *in_grh, const struct ib_mad *in,
255e26e7b88SLeon Romanovsky struct ib_mad *out, size_t *out_mad_size,
2564cd7c947SIra Weiny u16 *out_mad_pkey_index)
257fe2caefcSParav Pandit {
25884b56d57SLeon Romanovsky int status = IB_MAD_RESULT_SUCCESS;
259cad1fbb0SMitesh Ahuja struct ocrdma_dev *dev;
2604cd7c947SIra Weiny
261e26e7b88SLeon Romanovsky if (in->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT) {
262cad1fbb0SMitesh Ahuja dev = get_ocrdma_dev(ibdev);
263e26e7b88SLeon Romanovsky ocrdma_pma_counters(dev, out);
26484b56d57SLeon Romanovsky status |= IB_MAD_RESULT_REPLY;
265cad1fbb0SMitesh Ahuja }
26684b56d57SLeon Romanovsky
267cad1fbb0SMitesh Ahuja return status;
268fe2caefcSParav Pandit }
269