Linux-2.6.12-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!

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);
+}