245 lines
6.3 KiB
C
245 lines
6.3 KiB
C
/*
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* Copyright (c) 2004 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* $Id: mthca_av.c 1349 2004-12-16 21:09:43Z roland $
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*/
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_cache.h>
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#include "mthca_dev.h"
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struct mthca_av {
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__be32 port_pd;
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u8 reserved1;
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u8 g_slid;
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__be16 dlid;
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u8 reserved2;
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u8 gid_index;
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u8 msg_sr;
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u8 hop_limit;
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__be32 sl_tclass_flowlabel;
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__be32 dgid[4];
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};
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int mthca_create_ah(struct mthca_dev *dev,
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struct mthca_pd *pd,
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struct ib_ah_attr *ah_attr,
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struct mthca_ah *ah)
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{
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u32 index = -1;
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struct mthca_av *av = NULL;
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ah->type = MTHCA_AH_PCI_POOL;
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if (mthca_is_memfree(dev)) {
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ah->av = kmalloc(sizeof *ah->av, GFP_ATOMIC);
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if (!ah->av)
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return -ENOMEM;
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ah->type = MTHCA_AH_KMALLOC;
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av = ah->av;
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} else if (!atomic_read(&pd->sqp_count) &&
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!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
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index = mthca_alloc(&dev->av_table.alloc);
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/* fall back to allocate in host memory */
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if (index == -1)
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goto on_hca_fail;
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av = kmalloc(sizeof *av, GFP_ATOMIC);
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if (!av)
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goto on_hca_fail;
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ah->type = MTHCA_AH_ON_HCA;
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ah->avdma = dev->av_table.ddr_av_base +
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index * MTHCA_AV_SIZE;
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}
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on_hca_fail:
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if (ah->type == MTHCA_AH_PCI_POOL) {
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ah->av = pci_pool_alloc(dev->av_table.pool,
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SLAB_ATOMIC, &ah->avdma);
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if (!ah->av)
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return -ENOMEM;
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av = ah->av;
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}
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ah->key = pd->ntmr.ibmr.lkey;
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memset(av, 0, MTHCA_AV_SIZE);
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av->port_pd = cpu_to_be32(pd->pd_num | (ah_attr->port_num << 24));
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av->g_slid = ah_attr->src_path_bits;
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av->dlid = cpu_to_be16(ah_attr->dlid);
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av->msg_sr = (3 << 4) | /* 2K message */
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ah_attr->static_rate;
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av->sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
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if (ah_attr->ah_flags & IB_AH_GRH) {
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av->g_slid |= 0x80;
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av->gid_index = (ah_attr->port_num - 1) * dev->limits.gid_table_len +
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ah_attr->grh.sgid_index;
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av->hop_limit = ah_attr->grh.hop_limit;
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av->sl_tclass_flowlabel |=
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cpu_to_be32((ah_attr->grh.traffic_class << 20) |
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ah_attr->grh.flow_label);
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memcpy(av->dgid, ah_attr->grh.dgid.raw, 16);
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} else {
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/* Arbel workaround -- low byte of GID must be 2 */
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av->dgid[3] = cpu_to_be32(2);
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}
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if (0) {
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int j;
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mthca_dbg(dev, "Created UDAV at %p/%08lx:\n",
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av, (unsigned long) ah->avdma);
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for (j = 0; j < 8; ++j)
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printk(KERN_DEBUG " [%2x] %08x\n",
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j * 4, be32_to_cpu(((__be32 *) av)[j]));
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}
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if (ah->type == MTHCA_AH_ON_HCA) {
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memcpy_toio(dev->av_table.av_map + index * MTHCA_AV_SIZE,
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av, MTHCA_AV_SIZE);
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kfree(av);
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}
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return 0;
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}
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int mthca_destroy_ah(struct mthca_dev *dev, struct mthca_ah *ah)
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{
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switch (ah->type) {
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case MTHCA_AH_ON_HCA:
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mthca_free(&dev->av_table.alloc,
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(ah->avdma - dev->av_table.ddr_av_base) /
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MTHCA_AV_SIZE);
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break;
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case MTHCA_AH_PCI_POOL:
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pci_pool_free(dev->av_table.pool, ah->av, ah->avdma);
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break;
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case MTHCA_AH_KMALLOC:
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kfree(ah->av);
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break;
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}
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return 0;
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}
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int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah,
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struct ib_ud_header *header)
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{
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if (ah->type == MTHCA_AH_ON_HCA)
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return -EINVAL;
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header->lrh.service_level = be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28;
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header->lrh.destination_lid = ah->av->dlid;
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header->lrh.source_lid = cpu_to_be16(ah->av->g_slid & 0x7f);
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if (ah->av->g_slid & 0x80) {
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header->grh_present = 1;
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header->grh.traffic_class =
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(be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 20) & 0xff;
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header->grh.flow_label =
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ah->av->sl_tclass_flowlabel & cpu_to_be32(0xfffff);
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ib_get_cached_gid(&dev->ib_dev,
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be32_to_cpu(ah->av->port_pd) >> 24,
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ah->av->gid_index,
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&header->grh.source_gid);
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memcpy(header->grh.destination_gid.raw,
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ah->av->dgid, 16);
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} else {
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header->grh_present = 0;
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}
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return 0;
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}
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int __devinit mthca_init_av_table(struct mthca_dev *dev)
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{
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int err;
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if (mthca_is_memfree(dev))
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return 0;
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err = mthca_alloc_init(&dev->av_table.alloc,
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dev->av_table.num_ddr_avs,
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dev->av_table.num_ddr_avs - 1,
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0);
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if (err)
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return err;
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dev->av_table.pool = pci_pool_create("mthca_av", dev->pdev,
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MTHCA_AV_SIZE,
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MTHCA_AV_SIZE, 0);
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if (!dev->av_table.pool)
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goto out_free_alloc;
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if (!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
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dev->av_table.av_map = ioremap(pci_resource_start(dev->pdev, 4) +
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dev->av_table.ddr_av_base -
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dev->ddr_start,
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dev->av_table.num_ddr_avs *
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MTHCA_AV_SIZE);
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if (!dev->av_table.av_map)
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goto out_free_pool;
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} else
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dev->av_table.av_map = NULL;
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return 0;
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out_free_pool:
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pci_pool_destroy(dev->av_table.pool);
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out_free_alloc:
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mthca_alloc_cleanup(&dev->av_table.alloc);
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return -ENOMEM;
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}
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void __devexit mthca_cleanup_av_table(struct mthca_dev *dev)
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{
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if (mthca_is_memfree(dev))
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return;
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if (dev->av_table.av_map)
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iounmap(dev->av_table.av_map);
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pci_pool_destroy(dev->av_table.pool);
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mthca_alloc_cleanup(&dev->av_table.alloc);
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}
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