189 lines
6.3 KiB
C
189 lines
6.3 KiB
C
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/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SCIC_SDS_REMOTE_NODE_TABLE_H_
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#define _SCIC_SDS_REMOTE_NODE_TABLE_H_
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#include "isci.h"
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/**
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*
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*
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* Remote node sets are sets of remote node index in the remote node table. The
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* SCU hardware requires that STP remote node entries take three consecutive
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* remote node index so the table is arranged in sets of three. The bits are
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* used as 0111 0111 to make a byte and the bits define the set of three remote
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* nodes to use as a sequence.
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*/
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#define SCIC_SDS_REMOTE_NODE_SETS_PER_BYTE 2
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/**
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*
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*
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* Since the remote node table is organized as DWORDS take the remote node sets
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* in bytes and represent them in DWORDs. The lowest ordered bits are the ones
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* used in case full DWORD is not being used. i.e. 0000 0000 0000 0000 0111
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* 0111 0111 0111 // if only a single WORD is in use in the DWORD.
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*/
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#define SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD \
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(sizeof(u32) * SCIC_SDS_REMOTE_NODE_SETS_PER_BYTE)
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/**
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*
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*
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* This is a count of the numeber of remote nodes that can be represented in a
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* byte
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*/
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#define SCIC_SDS_REMOTE_NODES_PER_BYTE \
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(SCU_STP_REMOTE_NODE_COUNT * SCIC_SDS_REMOTE_NODE_SETS_PER_BYTE)
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/**
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*
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*
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* This is a count of the number of remote nodes that can be represented in a
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* DWROD
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*/
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#define SCIC_SDS_REMOTE_NODES_PER_DWORD \
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(sizeof(u32) * SCIC_SDS_REMOTE_NODES_PER_BYTE)
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/**
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*
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*
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* This is the number of bits in a remote node group
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*/
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#define SCIC_SDS_REMOTE_NODES_BITS_PER_GROUP 4
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#define SCIC_SDS_REMOTE_NODE_TABLE_INVALID_INDEX (0xFFFFFFFF)
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#define SCIC_SDS_REMOTE_NODE_TABLE_FULL_SLOT_VALUE (0x07)
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#define SCIC_SDS_REMOTE_NODE_TABLE_EMPTY_SLOT_VALUE (0x00)
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/**
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*
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*
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* Expander attached sata remote node count
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*/
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#define SCU_STP_REMOTE_NODE_COUNT 3
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/**
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*
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*
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* Expander or direct attached ssp remote node count
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*/
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#define SCU_SSP_REMOTE_NODE_COUNT 1
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/**
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*
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*
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* Direct attached STP remote node count
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*/
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#define SCU_SATA_REMOTE_NODE_COUNT 1
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/**
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* struct sci_remote_node_table -
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*
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*
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*/
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struct sci_remote_node_table {
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/**
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* This field contains the array size in dwords
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*/
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u16 available_nodes_array_size;
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/**
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* This field contains the array size of the
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*/
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u16 group_array_size;
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/**
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* This field is the array of available remote node entries in bits.
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* Because of the way STP remote node data is allocated on the SCU hardware
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* the remote nodes must occupy three consecutive remote node context
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* entries. For ease of allocation and de-allocation we have broken the
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* sets of three into a single nibble. When the STP RNi is allocated all
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* of the bits in the nibble are cleared. This math results in a table size
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* of MAX_REMOTE_NODES / CONSECUTIVE RNi ENTRIES for STP / 2 entries per byte.
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*/
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u32 available_remote_nodes[
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(SCI_MAX_REMOTE_DEVICES / SCIC_SDS_REMOTE_NODES_PER_DWORD)
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+ ((SCI_MAX_REMOTE_DEVICES % SCIC_SDS_REMOTE_NODES_PER_DWORD) != 0)];
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/**
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* This field is the nibble selector for the above table. There are three
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* possible selectors each for fast lookup when trying to find one, two or
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* three remote node entries.
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*/
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u32 remote_node_groups[
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SCU_STP_REMOTE_NODE_COUNT][
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(SCI_MAX_REMOTE_DEVICES / (32 * SCU_STP_REMOTE_NODE_COUNT))
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+ ((SCI_MAX_REMOTE_DEVICES % (32 * SCU_STP_REMOTE_NODE_COUNT)) != 0)];
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};
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/* --------------------------------------------------------------------------- */
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void sci_remote_node_table_initialize(
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struct sci_remote_node_table *remote_node_table,
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u32 remote_node_entries);
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u16 sci_remote_node_table_allocate_remote_node(
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struct sci_remote_node_table *remote_node_table,
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u32 remote_node_count);
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void sci_remote_node_table_release_remote_node_index(
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struct sci_remote_node_table *remote_node_table,
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u32 remote_node_count,
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u16 remote_node_index);
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#endif /* _SCIC_SDS_REMOTE_NODE_TABLE_H_ */
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