/* * 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_MEMORY_DESCRIPTOR_LIST_H_ #define _SCI_MEMORY_DESCRIPTOR_LIST_H_ /** * This file contains all of the basic data types utilized by an SCI user or * implementor. * * */ struct sci_base_memory_descriptor_list; /** * * * SCI_MDE_ATTRIBUTES These constants depict memory attributes for the Memory * Descriptor Entries (MDEs) contained in the MDL. */ #define SCI_MDE_ATTRIBUTE_CACHEABLE 0x0001 #define SCI_MDE_ATTRIBUTE_PHYSICALLY_CONTIGUOUS 0x0002 /** * struct sci_physical_memory_descriptor - This structure defines a description * of a memory location for the SCI implementation. * * */ struct sci_physical_memory_descriptor { /** * This field contains the virtual address associated with this descriptor * element. This field shall be zero when the descriptor is retrieved from * the SCI implementation. The user shall set this field prior * sci_controller_start() */ void *virtual_address; /** * This field contains the physical address associated with this desciptor * element. This field shall be zero when the descriptor is retrieved from * the SCI implementation. The user shall set this field prior * sci_controller_start() */ dma_addr_t physical_address; /** * This field contains the size requirement for this memory descriptor. * A value of zero for this field indicates the end of the descriptor * list. The value should be treated as read only for an SCI user. */ u32 constant_memory_size; /** * This field contains the alignment requirement for this memory * descriptor. A value of zero for this field indicates the end of the * descriptor list. All other values indicate the number of bytes to * achieve the necessary alignment. The value should be treated as * read only for an SCI user. */ u32 constant_memory_alignment; /** * This field contains an indication regarding the desired memory * attributes for this memory descriptor entry. * Notes: * - If the cacheable attribute is set, the user can allocate * memory that is backed by cache for better performance. It * is not required that the memory be backed by cache. * - If the physically contiguous attribute is set, then the * entire memory must be physically contiguous across all * page boundaries. */ u16 constant_memory_attributes; }; /** * sci_mdl_first_entry() - This method simply rewinds the MDL iterator back to * the first memory descriptor entry in the list. * @mdl: This parameter specifies the memory descriptor list that is to be * rewound. * */ void sci_mdl_first_entry( struct sci_base_memory_descriptor_list *mdl); /** * sci_mdl_next_entry() - This method simply updates the "current" pointer to * the next sequential memory descriptor. * @mdl: This parameter specifies the memory descriptor list for which to * return the next memory descriptor entry in the list. * * none. */ void sci_mdl_next_entry( struct sci_base_memory_descriptor_list *mdl); /** * sci_mdl_get_current_entry() - This method simply returns the current memory * descriptor entry. * @mdl: This parameter specifies the memory descriptor list for which to * return the current memory descriptor entry. * * This method returns a pointer to the current physical memory descriptor in * the MDL. NULL This value is returned if there are no descriptors in the list. */ struct sci_physical_memory_descriptor *sci_mdl_get_current_entry( struct sci_base_memory_descriptor_list *mdl); #endif /* _SCI_MEMORY_DESCRIPTOR_LIST_H_ */