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!
This commit is contained in:
Linus Torvalds
201
drivers/infiniband/core/packer.c
Normal file
201
drivers/infiniband/core/packer.c
Normal file
@@ -0,0 +1,201 @@
|
||||
/*
|
||||
* 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: packer.c 1349 2004-12-16 21:09:43Z roland $
|
||||
*/
|
||||
|
||||
#include <ib_pack.h>
|
||||
|
||||
static u64 value_read(int offset, int size, void *structure)
|
||||
{
|
||||
switch (size) {
|
||||
case 1: return *(u8 *) (structure + offset);
|
||||
case 2: return be16_to_cpup((__be16 *) (structure + offset));
|
||||
case 4: return be32_to_cpup((__be32 *) (structure + offset));
|
||||
case 8: return be64_to_cpup((__be64 *) (structure + offset));
|
||||
default:
|
||||
printk(KERN_WARNING "Field size %d bits not handled\n", size * 8);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* ib_pack - Pack a structure into a buffer
|
||||
* @desc:Array of structure field descriptions
|
||||
* @desc_len:Number of entries in @desc
|
||||
* @structure:Structure to pack from
|
||||
* @buf:Buffer to pack into
|
||||
*
|
||||
* ib_pack() packs a list of structure fields into a buffer,
|
||||
* controlled by the array of fields in @desc.
|
||||
*/
|
||||
void ib_pack(const struct ib_field *desc,
|
||||
int desc_len,
|
||||
void *structure,
|
||||
void *buf)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < desc_len; ++i) {
|
||||
if (desc[i].size_bits <= 32) {
|
||||
int shift;
|
||||
u32 val;
|
||||
__be32 mask;
|
||||
__be32 *addr;
|
||||
|
||||
shift = 32 - desc[i].offset_bits - desc[i].size_bits;
|
||||
if (desc[i].struct_size_bytes)
|
||||
val = value_read(desc[i].struct_offset_bytes,
|
||||
desc[i].struct_size_bytes,
|
||||
structure) << shift;
|
||||
else
|
||||
val = 0;
|
||||
|
||||
mask = cpu_to_be32(((1ull << desc[i].size_bits) - 1) << shift);
|
||||
addr = (__be32 *) buf + desc[i].offset_words;
|
||||
*addr = (*addr & ~mask) | (cpu_to_be32(val) & mask);
|
||||
} else if (desc[i].size_bits <= 64) {
|
||||
int shift;
|
||||
u64 val;
|
||||
__be64 mask;
|
||||
__be64 *addr;
|
||||
|
||||
shift = 64 - desc[i].offset_bits - desc[i].size_bits;
|
||||
if (desc[i].struct_size_bytes)
|
||||
val = value_read(desc[i].struct_offset_bytes,
|
||||
desc[i].struct_size_bytes,
|
||||
structure) << shift;
|
||||
else
|
||||
val = 0;
|
||||
|
||||
mask = cpu_to_be64(((1ull << desc[i].size_bits) - 1) << shift);
|
||||
addr = (__be64 *) ((__be32 *) buf + desc[i].offset_words);
|
||||
*addr = (*addr & ~mask) | (cpu_to_be64(val) & mask);
|
||||
} else {
|
||||
if (desc[i].offset_bits % 8 ||
|
||||
desc[i].size_bits % 8) {
|
||||
printk(KERN_WARNING "Structure field %s of size %d "
|
||||
"bits is not byte-aligned\n",
|
||||
desc[i].field_name, desc[i].size_bits);
|
||||
}
|
||||
|
||||
if (desc[i].struct_size_bytes)
|
||||
memcpy(buf + desc[i].offset_words * 4 +
|
||||
desc[i].offset_bits / 8,
|
||||
structure + desc[i].struct_offset_bytes,
|
||||
desc[i].size_bits / 8);
|
||||
else
|
||||
memset(buf + desc[i].offset_words * 4 +
|
||||
desc[i].offset_bits / 8,
|
||||
0,
|
||||
desc[i].size_bits / 8);
|
||||
}
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(ib_pack);
|
||||
|
||||
static void value_write(int offset, int size, u64 val, void *structure)
|
||||
{
|
||||
switch (size * 8) {
|
||||
case 8: *( u8 *) (structure + offset) = val; break;
|
||||
case 16: *(__be16 *) (structure + offset) = cpu_to_be16(val); break;
|
||||
case 32: *(__be32 *) (structure + offset) = cpu_to_be32(val); break;
|
||||
case 64: *(__be64 *) (structure + offset) = cpu_to_be64(val); break;
|
||||
default:
|
||||
printk(KERN_WARNING "Field size %d bits not handled\n", size * 8);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* ib_unpack - Unpack a buffer into a structure
|
||||
* @desc:Array of structure field descriptions
|
||||
* @desc_len:Number of entries in @desc
|
||||
* @buf:Buffer to unpack from
|
||||
* @structure:Structure to unpack into
|
||||
*
|
||||
* ib_pack() unpacks a list of structure fields from a buffer,
|
||||
* controlled by the array of fields in @desc.
|
||||
*/
|
||||
void ib_unpack(const struct ib_field *desc,
|
||||
int desc_len,
|
||||
void *buf,
|
||||
void *structure)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < desc_len; ++i) {
|
||||
if (!desc[i].struct_size_bytes)
|
||||
continue;
|
||||
|
||||
if (desc[i].size_bits <= 32) {
|
||||
int shift;
|
||||
u32 val;
|
||||
u32 mask;
|
||||
__be32 *addr;
|
||||
|
||||
shift = 32 - desc[i].offset_bits - desc[i].size_bits;
|
||||
mask = ((1ull << desc[i].size_bits) - 1) << shift;
|
||||
addr = (__be32 *) buf + desc[i].offset_words;
|
||||
val = (be32_to_cpup(addr) & mask) >> shift;
|
||||
value_write(desc[i].struct_offset_bytes,
|
||||
desc[i].struct_size_bytes,
|
||||
val,
|
||||
structure);
|
||||
} else if (desc[i].size_bits <= 64) {
|
||||
int shift;
|
||||
u64 val;
|
||||
u64 mask;
|
||||
__be64 *addr;
|
||||
|
||||
shift = 64 - desc[i].offset_bits - desc[i].size_bits;
|
||||
mask = ((1ull << desc[i].size_bits) - 1) << shift;
|
||||
addr = (__be64 *) buf + desc[i].offset_words;
|
||||
val = (be64_to_cpup(addr) & mask) >> shift;
|
||||
value_write(desc[i].struct_offset_bytes,
|
||||
desc[i].struct_size_bytes,
|
||||
val,
|
||||
structure);
|
||||
} else {
|
||||
if (desc[i].offset_bits % 8 ||
|
||||
desc[i].size_bits % 8) {
|
||||
printk(KERN_WARNING "Structure field %s of size %d "
|
||||
"bits is not byte-aligned\n",
|
||||
desc[i].field_name, desc[i].size_bits);
|
||||
}
|
||||
|
||||
memcpy(structure + desc[i].struct_offset_bytes,
|
||||
buf + desc[i].offset_words * 4 +
|
||||
desc[i].offset_bits / 8,
|
||||
desc[i].size_bits / 8);
|
||||
}
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(ib_unpack);
|
||||
Reference in New Issue
Block a user