| /* |
| * 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, |
| &header->grh.source_gid); |
| memcpy(header->grh.destination_gid.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); |
| } |