diff options
Diffstat (limited to 'drivers/scsi/isci/core/sci_util.h')
| -rw-r--r-- | drivers/scsi/isci/core/sci_util.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/drivers/scsi/isci/core/sci_util.h b/drivers/scsi/isci/core/sci_util.h new file mode 100644 index 000000000000..67e2badf8ea8 --- /dev/null +++ b/drivers/scsi/isci/core/sci_util.h @@ -0,0 +1,138 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * 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. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _SCI_UTIL_H_ +#define _SCI_UTIL_H_ + +#include "sci_types.h" + +/** + * SCIC_SWAP_DWORD() - + * + * Normal byte swap macro + */ +#define SCIC_SWAP_DWORD(x) \ + (\ + (((x) >> 24) & 0x000000FF) \ + | (((x) >> 8) & 0x0000FF00) \ + | (((x) << 8) & 0x00FF0000) \ + | (((x) << 24) & 0xFF000000) \ + ) + +#define SCIC_BUILD_DWORD(char_buffer) \ + (\ + ((char_buffer)[0] << 24) \ + | ((char_buffer)[1] << 16) \ + | ((char_buffer)[2] << 8) \ + | ((char_buffer)[3]) \ + ) + +#define SCI_FIELD_OFFSET(type, field) ((unsigned long)&(((type *)0)->field)) + +/** + * sci_physical_address_add() - + * + * This macro simply performs addition on an dma_addr_t type. The + * lower u32 value is "clipped" or "wrapped" back through 0. When this occurs + * the upper 32-bits are incremented by 1. + */ +#define sci_physical_address_add(physical_address, value) \ + { \ + u32 lower = lower_32_bits((physical_address)); \ + u32 upper = upper_32_bits((physical_address)); \ + \ + if (lower + (value) < lower) \ + upper += 1; \ + \ + lower += (value); \ + sci_cb_make_physical_address(physical_address, upper, lower); \ + } + +/** + * sci_physical_address_subtract() - + * + * This macro simply performs subtraction on an dma_addr_t type. The + * lower u32 value is "clipped" or "wrapped" back through 0. When this occurs + * the upper 32-bits are decremented by 1. + */ +#define sci_physical_address_subtract(physical_address, value) \ + { \ + u32 lower = lower_32_bits((physical_address)); \ + u32 upper = upper_32_bits((physical_address)); \ + \ + if (lower - (value) > lower) \ + upper -= 1; \ + \ + lower -= (value); \ + sci_cb_make_physical_address(physical_address, upper, lower); \ + } + +/** + * scic_word_copy_with_swap() - Copy the data from source to destination and + * swap the bytes during the copy. + * @destination: This parameter specifies the destination address to which the + * data is to be copied. + * @source: This parameter specifies the source address from which data is to + * be copied. + * @word_count: This parameter specifies the number of 32-bit words to copy and + * byte swap. + * + */ +void scic_word_copy_with_swap( + u32 *destination, + u32 *source, + u32 word_count); + +#endif /* _SCI_UTIL_H_ */ |