2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * $Id: mthca_av.c 1349 2004-12-16 21:09:43Z roland $
36 #include <linux/init.h>
37 #include <linux/string.h>
38 #include <linux/slab.h>
40 #include <rdma/ib_verbs.h>
41 #include <rdma/ib_cache.h>
43 #include "mthca_dev.h"
54 __be32 sl_tclass_flowlabel;
58 int mthca_create_ah(struct mthca_dev *dev,
60 struct ib_ah_attr *ah_attr,
64 struct mthca_av *av = NULL;
66 ah->type = MTHCA_AH_PCI_POOL;
68 if (mthca_is_memfree(dev)) {
69 ah->av = kmalloc(sizeof *ah->av, GFP_ATOMIC);
73 ah->type = MTHCA_AH_KMALLOC;
75 } else if (!atomic_read(&pd->sqp_count) &&
76 !(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
77 index = mthca_alloc(&dev->av_table.alloc);
79 /* fall back to allocate in host memory */
83 av = kmalloc(sizeof *av, GFP_ATOMIC);
87 ah->type = MTHCA_AH_ON_HCA;
88 ah->avdma = dev->av_table.ddr_av_base +
89 index * MTHCA_AV_SIZE;
93 if (ah->type == MTHCA_AH_PCI_POOL) {
94 ah->av = pci_pool_alloc(dev->av_table.pool,
95 SLAB_ATOMIC, &ah->avdma);
102 ah->key = pd->ntmr.ibmr.lkey;
104 memset(av, 0, MTHCA_AV_SIZE);
106 av->port_pd = cpu_to_be32(pd->pd_num | (ah_attr->port_num << 24));
107 av->g_slid = ah_attr->src_path_bits;
108 av->dlid = cpu_to_be16(ah_attr->dlid);
109 av->msg_sr = (3 << 4) | /* 2K message */
110 ah_attr->static_rate;
111 av->sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
112 if (ah_attr->ah_flags & IB_AH_GRH) {
114 av->gid_index = (ah_attr->port_num - 1) * dev->limits.gid_table_len +
115 ah_attr->grh.sgid_index;
116 av->hop_limit = ah_attr->grh.hop_limit;
117 av->sl_tclass_flowlabel |=
118 cpu_to_be32((ah_attr->grh.traffic_class << 20) |
119 ah_attr->grh.flow_label);
120 memcpy(av->dgid, ah_attr->grh.dgid.raw, 16);
122 /* Arbel workaround -- low byte of GID must be 2 */
123 av->dgid[3] = cpu_to_be32(2);
129 mthca_dbg(dev, "Created UDAV at %p/%08lx:\n",
130 av, (unsigned long) ah->avdma);
131 for (j = 0; j < 8; ++j)
132 printk(KERN_DEBUG " [%2x] %08x\n",
133 j * 4, be32_to_cpu(((__be32 *) av)[j]));
136 if (ah->type == MTHCA_AH_ON_HCA) {
137 memcpy_toio(dev->av_table.av_map + index * MTHCA_AV_SIZE,
145 int mthca_destroy_ah(struct mthca_dev *dev, struct mthca_ah *ah)
148 case MTHCA_AH_ON_HCA:
149 mthca_free(&dev->av_table.alloc,
150 (ah->avdma - dev->av_table.ddr_av_base) /
154 case MTHCA_AH_PCI_POOL:
155 pci_pool_free(dev->av_table.pool, ah->av, ah->avdma);
158 case MTHCA_AH_KMALLOC:
166 int mthca_ah_grh_present(struct mthca_ah *ah)
168 return !!(ah->av->g_slid & 0x80);
171 int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah,
172 struct ib_ud_header *header)
174 if (ah->type == MTHCA_AH_ON_HCA)
177 header->lrh.service_level = be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28;
178 header->lrh.destination_lid = ah->av->dlid;
179 header->lrh.source_lid = cpu_to_be16(ah->av->g_slid & 0x7f);
180 if (mthca_ah_grh_present(ah)) {
181 header->grh.traffic_class =
182 (be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 20) & 0xff;
183 header->grh.flow_label =
184 ah->av->sl_tclass_flowlabel & cpu_to_be32(0xfffff);
185 ib_get_cached_gid(&dev->ib_dev,
186 be32_to_cpu(ah->av->port_pd) >> 24,
187 ah->av->gid_index % dev->limits.gid_table_len,
188 &header->grh.source_gid);
189 memcpy(header->grh.destination_gid.raw,
196 int mthca_ah_query(struct ib_ah *ibah, struct ib_ah_attr *attr)
198 struct mthca_ah *ah = to_mah(ibah);
199 struct mthca_dev *dev = to_mdev(ibah->device);
201 /* Only implement for MAD and memfree ah for now. */
202 if (ah->type == MTHCA_AH_ON_HCA)
205 memset(attr, 0, sizeof *attr);
206 attr->dlid = be16_to_cpu(ah->av->dlid);
207 attr->sl = be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28;
208 attr->static_rate = ah->av->msg_sr & 0x7;
209 attr->src_path_bits = ah->av->g_slid & 0x7F;
210 attr->port_num = be32_to_cpu(ah->av->port_pd) >> 24;
211 attr->ah_flags = mthca_ah_grh_present(ah) ? IB_AH_GRH : 0;
213 if (attr->ah_flags) {
214 attr->grh.traffic_class =
215 be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 20;
216 attr->grh.flow_label =
217 be32_to_cpu(ah->av->sl_tclass_flowlabel) & 0xfffff;
218 attr->grh.hop_limit = ah->av->hop_limit;
219 attr->grh.sgid_index = ah->av->gid_index &
220 (dev->limits.gid_table_len - 1);
221 memcpy(attr->grh.dgid.raw, ah->av->dgid, 16);
227 int __devinit mthca_init_av_table(struct mthca_dev *dev)
231 if (mthca_is_memfree(dev))
234 err = mthca_alloc_init(&dev->av_table.alloc,
235 dev->av_table.num_ddr_avs,
236 dev->av_table.num_ddr_avs - 1,
241 dev->av_table.pool = pci_pool_create("mthca_av", dev->pdev,
244 if (!dev->av_table.pool)
247 if (!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
248 dev->av_table.av_map = ioremap(pci_resource_start(dev->pdev, 4) +
249 dev->av_table.ddr_av_base -
251 dev->av_table.num_ddr_avs *
253 if (!dev->av_table.av_map)
256 dev->av_table.av_map = NULL;
261 pci_pool_destroy(dev->av_table.pool);
264 mthca_alloc_cleanup(&dev->av_table.alloc);
268 void mthca_cleanup_av_table(struct mthca_dev *dev)
270 if (mthca_is_memfree(dev))
273 if (dev->av_table.av_map)
274 iounmap(dev->av_table.av_map);
275 pci_pool_destroy(dev->av_table.pool);
276 mthca_alloc_cleanup(&dev->av_table.alloc);