279 lines
8.1 KiB
C
279 lines
8.1 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_UNSOLICITED_FRAME_CONTROL_H_
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#define _SCIC_SDS_UNSOLICITED_FRAME_CONTROL_H_
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#include "isci.h"
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#define SCU_UNSOLICITED_FRAME_HEADER_DATA_DWORDS 15
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/**
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* struct scu_unsolicited_frame_header -
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*
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* This structure delineates the format of an unsolicited frame header. The
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* first DWORD are UF attributes defined by the silicon architecture. The data
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* depicts actual header information received on the link.
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*/
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struct scu_unsolicited_frame_header {
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/**
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* This field indicates if there is an Initiator Index Table entry with
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* which this header is associated.
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*/
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u32 iit_exists:1;
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/**
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* This field simply indicates the protocol type (i.e. SSP, STP, SMP).
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*/
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u32 protocol_type:3;
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/**
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* This field indicates if the frame is an address frame (IAF or OAF)
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* or if it is a information unit frame.
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*/
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u32 is_address_frame:1;
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/**
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* This field simply indicates the connection rate at which the frame
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* was received.
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*/
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u32 connection_rate:4;
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u32 reserved:23;
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/**
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* This field represents the actual header data received on the link.
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*/
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u32 data[SCU_UNSOLICITED_FRAME_HEADER_DATA_DWORDS];
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};
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/**
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* enum unsolicited_frame_state -
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*
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* This enumeration represents the current unsolicited frame state. The
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* controller object can not updtate the hardware unsolicited frame put pointer
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* unless it has already processed the priror unsolicited frames.
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*/
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enum unsolicited_frame_state {
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/**
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* This state is when the frame is empty and not in use. It is
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* different from the released state in that the hardware could DMA
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* data to this frame buffer.
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*/
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UNSOLICITED_FRAME_EMPTY,
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/**
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* This state is set when the frame buffer is in use by by some
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* object in the system.
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*/
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UNSOLICITED_FRAME_IN_USE,
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/**
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* This state is set when the frame is returned to the free pool
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* but one or more frames prior to this one are still in use.
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* Once all of the frame before this one are freed it will go to
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* the empty state.
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*/
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UNSOLICITED_FRAME_RELEASED,
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UNSOLICITED_FRAME_MAX_STATES
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};
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/**
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* struct sci_unsolicited_frame -
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*
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* This is the unsolicited frame data structure it acts as the container for
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* the current frame state, frame header and frame buffer.
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*/
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struct sci_unsolicited_frame {
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/**
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* This field contains the current frame state
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*/
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enum unsolicited_frame_state state;
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/**
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* This field points to the frame header data.
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*/
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struct scu_unsolicited_frame_header *header;
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/**
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* This field points to the frame buffer data.
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*/
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void *buffer;
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};
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/**
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* struct sci_uf_header_array -
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*
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* This structure contains all of the unsolicited frame header information.
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*/
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struct sci_uf_header_array {
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/**
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* This field is represents a virtual pointer to the start
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* address of the UF address table. The table contains
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* 64-bit pointers as required by the hardware.
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*/
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struct scu_unsolicited_frame_header *array;
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/**
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* This field specifies the physical address location for the UF
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* buffer array.
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*/
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dma_addr_t physical_address;
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};
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/**
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* struct sci_uf_buffer_array -
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*
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* This structure contains all of the unsolicited frame buffer (actual payload)
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* information.
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*/
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struct sci_uf_buffer_array {
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/**
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* This field is the unsolicited frame data its used to manage
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* the data for the unsolicited frame requests. It also represents
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* the virtual address location that corresponds to the
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* physical_address field.
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*/
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struct sci_unsolicited_frame array[SCU_MAX_UNSOLICITED_FRAMES];
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/**
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* This field specifies the physical address location for the UF
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* buffer array.
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*/
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dma_addr_t physical_address;
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};
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/**
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* struct sci_uf_address_table_array -
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*
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* This object maintains all of the unsolicited frame address table specific
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* data. The address table is a collection of 64-bit pointers that point to
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* 1KB buffers into which the silicon will DMA unsolicited frames.
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*/
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struct sci_uf_address_table_array {
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/**
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* This field represents a virtual pointer that refers to the
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* starting address of the UF address table.
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* 64-bit pointers are required by the hardware.
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*/
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u64 *array;
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/**
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* This field specifies the physical address location for the UF
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* address table.
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*/
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dma_addr_t physical_address;
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};
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/**
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* struct sci_unsolicited_frame_control -
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*
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* This object contains all of the data necessary to handle unsolicited frames.
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*/
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struct sci_unsolicited_frame_control {
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/**
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* This field is the software copy of the unsolicited frame queue
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* get pointer. The controller object writes this value to the
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* hardware to let the hardware put more unsolicited frame entries.
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*/
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u32 get;
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/**
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* This field contains all of the unsolicited frame header
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* specific fields.
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*/
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struct sci_uf_header_array headers;
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/**
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* This field contains all of the unsolicited frame buffer
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* specific fields.
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*/
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struct sci_uf_buffer_array buffers;
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/**
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* This field contains all of the unsolicited frame address table
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* specific fields.
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*/
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struct sci_uf_address_table_array address_table;
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};
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struct isci_host;
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int sci_unsolicited_frame_control_construct(struct isci_host *ihost);
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enum sci_status sci_unsolicited_frame_control_get_header(
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struct sci_unsolicited_frame_control *uf_control,
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u32 frame_index,
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void **frame_header);
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enum sci_status sci_unsolicited_frame_control_get_buffer(
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struct sci_unsolicited_frame_control *uf_control,
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u32 frame_index,
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void **frame_buffer);
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bool sci_unsolicited_frame_control_release_frame(
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struct sci_unsolicited_frame_control *uf_control,
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u32 frame_index);
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#endif /* _SCIC_SDS_UNSOLICITED_FRAME_CONTROL_H_ */
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