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, 365 insertions, 0 deletions

diff --git a/drivers/infiniband/core/ud_header.c b/drivers/infiniband/core/ud_header.c
new file mode 100644
index 000000000000..dc4eb1db5e96
--- /dev/null
+++ b/drivers/infiniband/core/ud_header.c
@@ -0,0 +1,365 @@
+/*
+ * Copyright (c) 2004 Topspin Corporation.  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: ud_header.c 1349 2004-12-16 21:09:43Z roland $
+ */
+
+#include <linux/errno.h>
+
+#include <ib_pack.h>
+
+#define STRUCT_FIELD(header, field) \
+        .struct_offset_bytes = offsetof(struct ib_unpacked_ ## header, field),      \
+        .struct_size_bytes   = sizeof ((struct ib_unpacked_ ## header *) 0)->field, \
+        .field_name          = #header ":" #field
+
+static const struct ib_field lrh_table[]  = {
+        { STRUCT_FIELD(lrh, virtual_lane),
+          .offset_words = 0,
+          .offset_bits  = 0,
+          .size_bits    = 4 },
+        { STRUCT_FIELD(lrh, link_version),
+          .offset_words = 0,
+          .offset_bits  = 4,
+          .size_bits    = 4 },
+        { STRUCT_FIELD(lrh, service_level),
+          .offset_words = 0,
+          .offset_bits  = 8,
+          .size_bits    = 4 },
+        { RESERVED,
+          .offset_words = 0,
+          .offset_bits  = 12,
+          .size_bits    = 2 },
+        { STRUCT_FIELD(lrh, link_next_header),
+          .offset_words = 0,
+          .offset_bits  = 14,
+          .size_bits    = 2 },
+        { STRUCT_FIELD(lrh, destination_lid),
+          .offset_words = 0,
+          .offset_bits  = 16,
+          .size_bits    = 16 },
+        { RESERVED,
+          .offset_words = 1,
+          .offset_bits  = 0,
+          .size_bits    = 5 },
+        { STRUCT_FIELD(lrh, packet_length),
+          .offset_words = 1,
+          .offset_bits  = 5,
+          .size_bits    = 11 },
+        { STRUCT_FIELD(lrh, source_lid),
+          .offset_words = 1,
+          .offset_bits  = 16,
+          .size_bits    = 16 }
+};
+
+static const struct ib_field grh_table[]  = {
+        { STRUCT_FIELD(grh, ip_version),
+          .offset_words = 0,
+          .offset_bits  = 0,
+          .size_bits    = 4 },
+        { STRUCT_FIELD(grh, traffic_class),
+          .offset_words = 0,
+          .offset_bits  = 4,
+          .size_bits    = 8 },
+        { STRUCT_FIELD(grh, flow_label),
+          .offset_words = 0,
+          .offset_bits  = 12,
+          .size_bits    = 20 },
+        { STRUCT_FIELD(grh, payload_length),
+          .offset_words = 1,
+          .offset_bits  = 0,
+          .size_bits    = 16 },
+        { STRUCT_FIELD(grh, next_header),
+          .offset_words = 1,
+          .offset_bits  = 16,
+          .size_bits    = 8 },
+        { STRUCT_FIELD(grh, hop_limit),
+          .offset_words = 1,
+          .offset_bits  = 24,
+          .size_bits    = 8 },
+        { STRUCT_FIELD(grh, source_gid),
+          .offset_words = 2,
+          .offset_bits  = 0,
+          .size_bits    = 128 },
+        { STRUCT_FIELD(grh, destination_gid),
+          .offset_words = 6,
+          .offset_bits  = 0,
+          .size_bits    = 128 }
+};
+
+static const struct ib_field bth_table[]  = {
+        { STRUCT_FIELD(bth, opcode),
+          .offset_words = 0,
+          .offset_bits  = 0,
+          .size_bits    = 8 },
+        { STRUCT_FIELD(bth, solicited_event),
+          .offset_words = 0,
+          .offset_bits  = 8,
+          .size_bits    = 1 },
+        { STRUCT_FIELD(bth, mig_req),
+          .offset_words = 0,
+          .offset_bits  = 9,
+          .size_bits    = 1 },
+        { STRUCT_FIELD(bth, pad_count),
+          .offset_words = 0,
+          .offset_bits  = 10,
+          .size_bits    = 2 },
+        { STRUCT_FIELD(bth, transport_header_version),
+          .offset_words = 0,
+          .offset_bits  = 12,
+          .size_bits    = 4 },
+        { STRUCT_FIELD(bth, pkey),
+          .offset_words = 0,
+          .offset_bits  = 16,
+          .size_bits    = 16 },
+        { RESERVED,
+          .offset_words = 1,
+          .offset_bits  = 0,
+          .size_bits    = 8 },
+        { STRUCT_FIELD(bth, destination_qpn),
+          .offset_words = 1,
+          .offset_bits  = 8,
+          .size_bits    = 24 },
+        { STRUCT_FIELD(bth, ack_req),
+          .offset_words = 2,
+          .offset_bits  = 0,
+          .size_bits    = 1 },
+        { RESERVED,
+          .offset_words = 2,
+          .offset_bits  = 1,
+          .size_bits    = 7 },
+        { STRUCT_FIELD(bth, psn),
+          .offset_words = 2,
+          .offset_bits  = 8,
+          .size_bits    = 24 }
+};
+
+static const struct ib_field deth_table[] = {
+        { STRUCT_FIELD(deth, qkey),
+          .offset_words = 0,
+          .offset_bits  = 0,
+          .size_bits    = 32 },
+        { RESERVED,
+          .offset_words = 1,
+          .offset_bits  = 0,
+          .size_bits    = 8 },
+        { STRUCT_FIELD(deth, source_qpn),
+          .offset_words = 1,
+          .offset_bits  = 8,
+          .size_bits    = 24 }
+};
+
+/**
+ * ib_ud_header_init - Initialize UD header structure
+ * @payload_bytes:Length of packet payload
+ * @grh_present:GRH flag (if non-zero, GRH will be included)
+ * @header:Structure to initialize
+ *
+ * ib_ud_header_init() initializes the lrh.link_version, lrh.link_next_header,
+ * lrh.packet_length, grh.ip_version, grh.payload_length,
+ * grh.next_header, bth.opcode, bth.pad_count and
+ * bth.transport_header_version fields of a &struct ib_ud_header given
+ * the payload length and whether a GRH will be included.
+ */
+void ib_ud_header_init(int                  payload_bytes,
+                       int                  grh_present,
+                       struct ib_ud_header *header)
+{
+        int header_len;
+
+        memset(header, 0, sizeof *header);
+
+        header_len =
+                IB_LRH_BYTES  +
+                IB_BTH_BYTES  +
+                IB_DETH_BYTES;
+        if (grh_present) {
+                header_len += IB_GRH_BYTES;
+        }
+
+        header->lrh.link_version     = 0;
+        header->lrh.link_next_header =
+                grh_present ? IB_LNH_IBA_GLOBAL : IB_LNH_IBA_LOCAL;
+        header->lrh.packet_length    = (IB_LRH_BYTES     +
+                                        IB_BTH_BYTES     +
+                                        IB_DETH_BYTES    +
+                                        payload_bytes    +
+                                        4                + /* ICRC     */
+                                        3) / 4;            /* round up */
+
+        header->grh_present          = grh_present;
+        if (grh_present) {
+                header->lrh.packet_length  += IB_GRH_BYTES / 4;
+
+                header->grh.ip_version      = 6;
+                header->grh.payload_length  =
+                        cpu_to_be16((IB_BTH_BYTES     +
+                                     IB_DETH_BYTES    +
+                                     payload_bytes    +
+                                     4                + /* ICRC     */
+                                     3) & ~3);          /* round up */
+                header->grh.next_header     = 0x1b;
+        }
+
+        cpu_to_be16s(&header->lrh.packet_length);
+
+        if (header->immediate_present)
+                header->bth.opcode           = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
+        else
+                header->bth.opcode           = IB_OPCODE_UD_SEND_ONLY;
+        header->bth.pad_count                = (4 - payload_bytes) & 3;
+        header->bth.transport_header_version = 0;
+}
+EXPORT_SYMBOL(ib_ud_header_init);
+
+/**
+ * ib_ud_header_pack - Pack UD header struct into wire format
+ * @header:UD header struct
+ * @buf:Buffer to pack into
+ *
+ * ib_ud_header_pack() packs the UD header structure @header into wire
+ * format in the buffer @buf.
+ */
+int ib_ud_header_pack(struct ib_ud_header *header,
+                      void                *buf)
+{
+        int len = 0;
+
+        ib_pack(lrh_table, ARRAY_SIZE(lrh_table),
+                &header->lrh, buf);
+        len += IB_LRH_BYTES;
+
+        if (header->grh_present) {
+                ib_pack(grh_table, ARRAY_SIZE(grh_table),
+                        &header->grh, buf + len);
+                len += IB_GRH_BYTES;
+        }
+
+        ib_pack(bth_table, ARRAY_SIZE(bth_table),
+                &header->bth, buf + len);
+        len += IB_BTH_BYTES;
+
+        ib_pack(deth_table, ARRAY_SIZE(deth_table),
+                &header->deth, buf + len);
+        len += IB_DETH_BYTES;
+
+        if (header->immediate_present) {
+                memcpy(buf + len, &header->immediate_data, sizeof header->immediate_data);
+                len += sizeof header->immediate_data;
+        }
+
+        return len;
+}
+EXPORT_SYMBOL(ib_ud_header_pack);
+
+/**
+ * ib_ud_header_unpack - Unpack UD header struct from wire format
+ * @header:UD header struct
+ * @buf:Buffer to pack into
+ *
+ * ib_ud_header_pack() unpacks the UD header structure @header from wire
+ * format in the buffer @buf.
+ */
+int ib_ud_header_unpack(void                *buf,
+                        struct ib_ud_header *header)
+{
+        ib_unpack(lrh_table, ARRAY_SIZE(lrh_table),
+                  buf, &header->lrh);
+        buf += IB_LRH_BYTES;
+
+        if (header->lrh.link_version != 0) {
+                printk(KERN_WARNING "Invalid LRH.link_version %d\n",
+                       header->lrh.link_version);
+                return -EINVAL;
+        }
+
+        switch (header->lrh.link_next_header) {
+        case IB_LNH_IBA_LOCAL:
+                header->grh_present = 0;
+                break;
+
+        case IB_LNH_IBA_GLOBAL:
+                header->grh_present = 1;
+                ib_unpack(grh_table, ARRAY_SIZE(grh_table),
+                          buf, &header->grh);
+                buf += IB_GRH_BYTES;
+
+                if (header->grh.ip_version != 6) {
+                        printk(KERN_WARNING "Invalid GRH.ip_version %d\n",
+                               header->grh.ip_version);
+                        return -EINVAL;
+                }
+                if (header->grh.next_header != 0x1b) {
+                        printk(KERN_WARNING "Invalid GRH.next_header 0x%02x\n",
+                               header->grh.next_header);
+                        return -EINVAL;
+                }
+                break;
+
+        default:
+                printk(KERN_WARNING "Invalid LRH.link_next_header %d\n",
+                       header->lrh.link_next_header);
+                return -EINVAL;
+        }
+
+        ib_unpack(bth_table, ARRAY_SIZE(bth_table),
+                  buf, &header->bth);
+        buf += IB_BTH_BYTES;
+
+        switch (header->bth.opcode) {
+        case IB_OPCODE_UD_SEND_ONLY:
+                header->immediate_present = 0;
+                break;
+        case IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE:
+                header->immediate_present = 1;
+                break;
+        default:
+                printk(KERN_WARNING "Invalid BTH.opcode 0x%02x\n",
+                       header->bth.opcode);
+                return -EINVAL;
+        }
+
+        if (header->bth.transport_header_version != 0) {
+                printk(KERN_WARNING "Invalid BTH.transport_header_version %d\n",
+                       header->bth.transport_header_version);
+                return -EINVAL;
+        }
+
+        ib_unpack(deth_table, ARRAY_SIZE(deth_table),
+                  buf, &header->deth);
+        buf += IB_DETH_BYTES;
+
+        if (header->immediate_present)
+                memcpy(&header->immediate_data, buf, sizeof header->immediate_data);
+
+        return 0;
+}
+EXPORT_SYMBOL(ib_ud_header_unpack);