2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
32 * $Id: mthca_av.c 1349 2004-12-16 21:09:43Z roland $
35 #include <linux/init.h>
40 #include "mthca_dev.h"
51 u32 sl_tclass_flowlabel;
55 int mthca_create_ah(struct mthca_dev *dev,
57 struct ib_ah_attr *ah_attr,
61 struct mthca_av *av = NULL;
63 ah->type = MTHCA_AH_PCI_POOL;
65 if (dev->hca_type == ARBEL_NATIVE) {
66 ah->av = kmalloc(sizeof *ah->av, GFP_KERNEL);
70 ah->type = MTHCA_AH_KMALLOC;
72 } else if (!atomic_read(&pd->sqp_count) &&
73 !(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
74 index = mthca_alloc(&dev->av_table.alloc);
76 /* fall back to allocate in host memory */
80 av = kmalloc(sizeof *av, GFP_KERNEL);
84 ah->type = MTHCA_AH_ON_HCA;
85 ah->avdma = dev->av_table.ddr_av_base +
86 index * MTHCA_AV_SIZE;
90 if (ah->type == MTHCA_AH_PCI_POOL) {
91 ah->av = pci_pool_alloc(dev->av_table.pool,
92 SLAB_KERNEL, &ah->avdma);
99 ah->key = pd->ntmr.ibmr.lkey;
101 memset(av, 0, MTHCA_AV_SIZE);
103 av->port_pd = cpu_to_be32(pd->pd_num | (ah_attr->port_num << 24));
104 av->g_slid = ah_attr->src_path_bits;
105 av->dlid = cpu_to_be16(ah_attr->dlid);
106 av->msg_sr = (3 << 4) | /* 2K message */
107 ah_attr->static_rate;
108 av->sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
109 if (ah_attr->ah_flags & IB_AH_GRH) {
111 av->gid_index = (ah_attr->port_num - 1) * dev->limits.gid_table_len +
112 ah_attr->grh.sgid_index;
113 av->hop_limit = ah_attr->grh.hop_limit;
114 av->sl_tclass_flowlabel |=
115 cpu_to_be32((ah_attr->grh.traffic_class << 20) |
116 ah_attr->grh.flow_label);
117 memcpy(av->dgid, ah_attr->grh.dgid.raw, 16);
119 /* Arbel workaround -- low byte of GID must be 2 */
120 av->dgid[3] = cpu_to_be32(2);
126 mthca_dbg(dev, "Created UDAV at %p/%08lx:\n",
127 av, (unsigned long) ah->avdma);
128 for (j = 0; j < 8; ++j)
129 printk(KERN_DEBUG " [%2x] %08x\n",
130 j * 4, be32_to_cpu(((u32 *) av)[j]));
133 if (ah->type == MTHCA_AH_ON_HCA) {
134 memcpy_toio(dev->av_table.av_map + index * MTHCA_AV_SIZE,
142 int mthca_destroy_ah(struct mthca_dev *dev, struct mthca_ah *ah)
145 case MTHCA_AH_ON_HCA:
146 mthca_free(&dev->av_table.alloc,
147 (ah->avdma - dev->av_table.ddr_av_base) /
151 case MTHCA_AH_PCI_POOL:
152 pci_pool_free(dev->av_table.pool, ah->av, ah->avdma);
155 case MTHCA_AH_KMALLOC:
163 int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah,
164 struct ib_ud_header *header)
166 if (ah->type == MTHCA_AH_ON_HCA)
169 header->lrh.service_level = be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28;
170 header->lrh.destination_lid = ah->av->dlid;
171 header->lrh.source_lid = ah->av->g_slid & 0x7f;
172 if (ah->av->g_slid & 0x80) {
173 header->grh_present = 1;
174 header->grh.traffic_class =
175 (be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 20) & 0xff;
176 header->grh.flow_label =
177 ah->av->sl_tclass_flowlabel & cpu_to_be32(0xfffff);
178 ib_get_cached_gid(&dev->ib_dev,
179 be32_to_cpu(ah->av->port_pd) >> 24,
181 &header->grh.source_gid);
182 memcpy(header->grh.destination_gid.raw,
185 header->grh_present = 0;
191 int __devinit mthca_init_av_table(struct mthca_dev *dev)
195 if (dev->hca_type == ARBEL_NATIVE)
198 err = mthca_alloc_init(&dev->av_table.alloc,
199 dev->av_table.num_ddr_avs,
200 dev->av_table.num_ddr_avs - 1,
205 dev->av_table.pool = pci_pool_create("mthca_av", dev->pdev,
208 if (!dev->av_table.pool)
211 if (!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
212 dev->av_table.av_map = ioremap(pci_resource_start(dev->pdev, 4) +
213 dev->av_table.ddr_av_base -
215 dev->av_table.num_ddr_avs *
217 if (!dev->av_table.av_map)
220 dev->av_table.av_map = NULL;
225 pci_pool_destroy(dev->av_table.pool);
228 mthca_alloc_cleanup(&dev->av_table.alloc);
232 void __devexit mthca_cleanup_av_table(struct mthca_dev *dev)
234 if (dev->hca_type == ARBEL_NATIVE)
237 if (dev->av_table.av_map)
238 iounmap(dev->av_table.av_map);
239 pci_pool_destroy(dev->av_table.pool);
240 mthca_alloc_cleanup(&dev->av_table.alloc);