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/*
* Copyright (c) 2004 Topspin Communications. All rights reserved.
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* $Id: mthca_av.c 1349 2004-12-16 21:09:43Z roland $
*/
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_cache.h>
#include "mthca_dev.h"
struct mthca_av {
__be32 port_pd;
u8 reserved1;
u8 g_slid;
__be16 dlid;
u8 reserved2;
u8 gid_index;
u8 msg_sr;
u8 hop_limit;
__be32 sl_tclass_flowlabel;
__be32 dgid[4];
};
int mthca_create_ah(struct mthca_dev *dev,
struct mthca_pd *pd,
struct ib_ah_attr *ah_attr,
struct mthca_ah *ah)
{
u32 index = -1;
struct mthca_av *av = NULL;
ah->type = MTHCA_AH_PCI_POOL;
if (mthca_is_memfree(dev)) {
ah->av = kmalloc(sizeof *ah->av, GFP_ATOMIC);
if (!ah->av)
return -ENOMEM;
ah->type = MTHCA_AH_KMALLOC;
av = ah->av;
} else if (!atomic_read(&pd->sqp_count) &&
!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
index = mthca_alloc(&dev->av_table.alloc);
/* fall back to allocate in host memory */
if (index == -1)
goto on_hca_fail;
av = kmalloc(sizeof *av, GFP_ATOMIC);
if (!av)
goto on_hca_fail;
ah->type = MTHCA_AH_ON_HCA;
ah->avdma = dev->av_table.ddr_av_base +
index * MTHCA_AV_SIZE;
}
on_hca_fail:
if (ah->type == MTHCA_AH_PCI_POOL) {
ah->av = pci_pool_alloc(dev->av_table.pool,
SLAB_ATOMIC, &ah->avdma);
if (!ah->av)
return -ENOMEM;
av = ah->av;
}
ah->key = pd->ntmr.ibmr.lkey;
memset(av, 0, MTHCA_AV_SIZE);
av->port_pd = cpu_to_be32(pd->pd_num | (ah_attr->port_num << 24));
av->g_slid = ah_attr->src_path_bits;
av->dlid = cpu_to_be16(ah_attr->dlid);
av->msg_sr = (3 << 4) | /* 2K message */
ah_attr->static_rate;
av->sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
if (ah_attr->ah_flags & IB_AH_GRH) {
av->g_slid |= 0x80;
av->gid_index = (ah_attr->port_num - 1) * dev->limits.gid_table_len +
ah_attr->grh.sgid_index;
av->hop_limit = ah_attr->grh.hop_limit;
av->sl_tclass_flowlabel |=
cpu_to_be32((ah_attr->grh.traffic_class << 20) |
ah_attr->grh.flow_label);
memcpy(av->dgid, ah_attr->grh.dgid.raw, 16);
} else {
/* Arbel workaround -- low byte of GID must be 2 */
av->dgid[3] = cpu_to_be32(2);
}
if (0) {
int j;
mthca_dbg(dev, "Created UDAV at %p/%08lx:\n",
av, (unsigned long) ah->avdma);
for (j = 0; j < 8; ++j)
printk(KERN_DEBUG " [%2x] %08x\n",
j * 4, be32_to_cpu(((__be32 *) av)[j]));
}
if (ah->type == MTHCA_AH_ON_HCA) {
memcpy_toio(dev->av_table.av_map + index * MTHCA_AV_SIZE,
av, MTHCA_AV_SIZE);
kfree(av);
}
return 0;
}
int mthca_destroy_ah(struct mthca_dev *dev, struct mthca_ah *ah)
{
switch (ah->type) {
case MTHCA_AH_ON_HCA:
mthca_free(&dev->av_table.alloc,
(ah->avdma - dev->av_table.ddr_av_base) /
MTHCA_AV_SIZE);
break;
case MTHCA_AH_PCI_POOL:
pci_pool_free(dev->av_table.pool, ah->av, ah->avdma);
break;
case MTHCA_AH_KMALLOC:
kfree(ah->av);
break;
}
return 0;
}
int mthca_ah_grh_present(struct mthca_ah *ah)
{
return !!(ah->av->g_slid & 0x80);
}
int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah,
struct ib_ud_header *header)
{
if (ah->type == MTHCA_AH_ON_HCA)
return -EINVAL;
header->lrh.service_level = be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28;
header->lrh.destination_lid = ah->av->dlid;
header->lrh.source_lid = cpu_to_be16(ah->av->g_slid & 0x7f);
if (mthca_ah_grh_present(ah)) {
header->grh.traffic_class =
(be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 20) & 0xff;
header->grh.flow_label =
ah->av->sl_tclass_flowlabel & cpu_to_be32(0xfffff);
ib_get_cached_gid(&dev->ib_dev,
be32_to_cpu(ah->av->port_pd) >> 24,
ah->av->gid_index % dev->limits.gid_table_len,
&header->grh.source_gid);
memcpy(header->grh.destination_gid.raw,
ah->av->dgid, 16);
}
return 0;
}
int mthca_ah_query(struct ib_ah *ibah, struct ib_ah_attr *attr)
{
struct mthca_ah *ah = to_mah(ibah);
struct mthca_dev *dev = to_mdev(ibah->device);
/* Only implement for MAD and memfree ah for now. */
if (ah->type == MTHCA_AH_ON_HCA)
return -ENOSYS;
memset(attr, 0, sizeof *attr);
attr->dlid = be16_to_cpu(ah->av->dlid);
attr->sl = be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28;
attr->static_rate = ah->av->msg_sr & 0x7;
attr->src_path_bits = ah->av->g_slid & 0x7F;
attr->port_num = be32_to_cpu(ah->av->port_pd) >> 24;
attr->ah_flags = mthca_ah_grh_present(ah) ? IB_AH_GRH : 0;
if (attr->ah_flags) {
attr->grh.traffic_class =
be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 20;
attr->grh.flow_label =
be32_to_cpu(ah->av->sl_tclass_flowlabel) & 0xfffff;
attr->grh.hop_limit = ah->av->hop_limit;
attr->grh.sgid_index = ah->av->gid_index &
(dev->limits.gid_table_len - 1);
memcpy(attr->grh.dgid.raw, ah->av->dgid, 16);
}
return 0;
}
int __devinit mthca_init_av_table(struct mthca_dev *dev)
{
int err;
if (mthca_is_memfree(dev))
return 0;
err = mthca_alloc_init(&dev->av_table.alloc,
dev->av_table.num_ddr_avs,
dev->av_table.num_ddr_avs - 1,
0);
if (err)
return err;
dev->av_table.pool = pci_pool_create("mthca_av", dev->pdev,
MTHCA_AV_SIZE,
MTHCA_AV_SIZE, 0);
if (!dev->av_table.pool)
goto out_free_alloc;
if (!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
dev->av_table.av_map = ioremap(pci_resource_start(dev->pdev, 4) +
dev->av_table.ddr_av_base -
dev->ddr_start,
dev->av_table.num_ddr_avs *
MTHCA_AV_SIZE);
if (!dev->av_table.av_map)
goto out_free_pool;
} else
dev->av_table.av_map = NULL;
return 0;
out_free_pool:
pci_pool_destroy(dev->av_table.pool);
out_free_alloc:
mthca_alloc_cleanup(&dev->av_table.alloc);
return -ENOMEM;
}
void __devexit mthca_cleanup_av_table(struct mthca_dev *dev)
{
if (mthca_is_memfree(dev))
return;
if (dev->av_table.av_map)
iounmap(dev->av_table.av_map);
pci_pool_destroy(dev->av_table.pool);
mthca_alloc_cleanup(&dev->av_table.alloc);
}
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