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| Current File : //sys/dev/isci/scil/scu_constants.h |
/*-
* 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.
*
* 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.
*
* $FreeBSD: release/9.1.0/sys/dev/isci/scil/scu_constants.h 231689 2012-02-14 15:58:49Z jimharris $
*/
#ifndef _SCU_CONSTANTS_H_
#define _SCU_CONSTANTS_H_
/**
* @file
*
* @brief This file contains the SCU hardware constants.
*/
#ifdef __cplusplus
extern "C" {
#endif // __cplusplus
#include <dev/isci/scil/sci_controller_constants.h>
/**
* 2 indicates the maximum number of UFs that can occur for a given IO
* request. The hardware handles reception of additional unsolicited
* frames while all UFs are in use, by holding off the transmitting
* device. This number could be theoretically reduced to 1, but 2
* provides for more reliable operation. During SATA PIO operation,
* it is possible under some conditions for there to be 3 separate
* FISes received, back to back to back (PIO Setup, Data, D2H Register).
* It is unlikely to have all 3 pending all at once without some of
* them already being processed.
*/
#define SCU_MIN_UNSOLICITED_FRAMES (8)
#define SCU_MIN_CRITICAL_NOTIFICATIONS (19)
#define SCU_MIN_EVENTS (4)
#define SCU_MIN_COMPLETION_QUEUE_SCRATCH (0)
#define SCU_MIN_COMPLETION_QUEUE_ENTRIES ( SCU_MIN_CRITICAL_NOTIFICATIONS \
+ SCU_MIN_EVENTS \
+ SCU_MIN_UNSOLICITED_FRAMES \
+ SCI_MIN_IO_REQUESTS \
+ SCU_MIN_COMPLETION_QUEUE_SCRATCH )
#define SCU_MAX_CRITICAL_NOTIFICATIONS (384)
#define SCU_MAX_EVENTS (128)
#define SCU_MAX_UNSOLICITED_FRAMES (128)
#define SCU_MAX_COMPLETION_QUEUE_SCRATCH (128)
#define SCU_MAX_COMPLETION_QUEUE_ENTRIES ( SCU_MAX_CRITICAL_NOTIFICATIONS \
+ SCU_MAX_EVENTS \
+ SCU_MAX_UNSOLICITED_FRAMES \
+ SCI_MAX_IO_REQUESTS \
+ SCU_MAX_COMPLETION_QUEUE_SCRATCH )
#if !defined(ENABLE_MINIMUM_MEMORY_MODE)
#define SCU_UNSOLICITED_FRAME_COUNT SCU_MAX_UNSOLICITED_FRAMES
#define SCU_CRITICAL_NOTIFICATION_COUNT SCU_MAX_CRITICAL_NOTIFICATIONS
#define SCU_EVENT_COUNT SCU_MAX_EVENTS
#define SCU_COMPLETION_QUEUE_SCRATCH SCU_MAX_COMPLETION_QUEUE_SCRATCH
#define SCU_IO_REQUEST_COUNT SCI_MAX_IO_REQUESTS
#define SCU_IO_REQUEST_SGE_COUNT SCI_MAX_SCATTER_GATHER_ELEMENTS
#define SCU_COMPLETION_QUEUE_COUNT SCU_MAX_COMPLETION_QUEUE_ENTRIES
#else
#define SCU_UNSOLICITED_FRAME_COUNT SCU_MIN_UNSOLICITED_FRAMES
#define SCU_CRITICAL_NOTIFICATION_COUNT SCU_MIN_CRITICAL_NOTIFICATIONS
#define SCU_EVENT_COUNT SCU_MIN_EVENTS
#define SCU_COMPLETION_QUEUE_SCRATCH SCU_MIN_COMPLETION_QUEUE_SCRATCH
#define SCU_IO_REQUEST_COUNT SCI_MIN_IO_REQUESTS
#define SCU_IO_REQUEST_SGE_COUNT SCI_MIN_SCATTER_GATHER_ELEMENTS
#define SCU_COMPLETION_QUEUE_COUNT SCU_MIN_COMPLETION_QUEUE_ENTRIES
#endif // !defined(ENABLE_MINIMUM_MEMORY_OPERATION)
/**
* The SCU_COMPLETION_QUEUE_COUNT constant indicates the size
* of the completion queue into which the hardware DMAs 32-bit
* quantas (completion entries).
*/
/**
* This queue must be programmed to a power of 2 size (e.g. 32, 64,
* 1024, etc.).
*/
#if (SCU_COMPLETION_QUEUE_COUNT != 16) && \
(SCU_COMPLETION_QUEUE_COUNT != 32) && \
(SCU_COMPLETION_QUEUE_COUNT != 64) && \
(SCU_COMPLETION_QUEUE_COUNT != 128) && \
(SCU_COMPLETION_QUEUE_COUNT != 256) && \
(SCU_COMPLETION_QUEUE_COUNT != 512) && \
(SCU_COMPLETION_QUEUE_COUNT != 1024)
#error "SCU_COMPLETION_QUEUE_COUNT must be set to a power of 2."
#endif
#if SCU_MIN_UNSOLICITED_FRAMES > SCU_MAX_UNSOLICITED_FRAMES
#error "Invalid configuration of unsolicited frame constants"
#endif // SCU_MIN_UNSOLICITED_FRAMES > SCU_MAX_UNSOLICITED_FRAMES
#define SCU_MIN_UF_TABLE_ENTRIES (8)
#define SCU_ABSOLUTE_MAX_UNSOLICITED_FRAMES (4096)
#define SCU_UNSOLICITED_FRAME_BUFFER_SIZE (1024)
#define SCU_INVALID_FRAME_INDEX (0xFFFF)
#define SCU_IO_REQUEST_MAX_SGE_SIZE (0x00FFFFFF)
#define SCU_IO_REQUEST_MAX_TRANSFER_LENGTH (0x00FFFFFF)
#ifdef __cplusplus
}
#endif // __cplusplus
#endif // _SCU_CONSTANTS_H_