summaryrefslogtreecommitdiff
path: root/drivers/infiniband/hw/mthca/mthca_av.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/infiniband/hw/mthca/mthca_av.c
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_av.c')
-rw-r--r--drivers/infiniband/hw/mthca/mthca_av.c241
1 files changed, 241 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_av.c b/drivers/infiniband/hw/mthca/mthca_av.c
new file mode 100644
index 000000000000..426d32778e9c
--- /dev/null
+++ b/drivers/infiniband/hw/mthca/mthca_av.c
@@ -0,0 +1,241 @@
+/*
+ * Copyright (c) 2004 Topspin Communications. 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 <ib_verbs.h>
+#include <ib_cache.h>
+
+#include "mthca_dev.h"
+
+struct mthca_av {
+ u32 port_pd;
+ u8 reserved1;
+ u8 g_slid;
+ u16 dlid;
+ u8 reserved2;
+ u8 gid_index;
+ u8 msg_sr;
+ u8 hop_limit;
+ u32 sl_tclass_flowlabel;
+ u32 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 (dev->hca_type == ARBEL_NATIVE) {
+ ah->av = kmalloc(sizeof *ah->av, GFP_KERNEL);
+ 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_KERNEL);
+ 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_KERNEL, &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(((u32 *) 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_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 = ah->av->g_slid & 0x7f;
+ if (ah->av->g_slid & 0x80) {
+ header->grh_present = 1;
+ 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);
+ } else {
+ header->grh_present = 0;
+ }
+
+ return 0;
+}
+
+int __devinit mthca_init_av_table(struct mthca_dev *dev)
+{
+ int err;
+
+ if (dev->hca_type == ARBEL_NATIVE)
+ 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 (dev->hca_type == ARBEL_NATIVE)
+ 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);
+}