diff options
Diffstat (limited to 'sys/dev/isci/scil/sci_base_memory_descriptor_list_decorator.c')
| -rw-r--r-- | sys/dev/isci/scil/sci_base_memory_descriptor_list_decorator.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/sys/dev/isci/scil/sci_base_memory_descriptor_list_decorator.c b/sys/dev/isci/scil/sci_base_memory_descriptor_list_decorator.c new file mode 100644 index 0000000..0c691f0 --- /dev/null +++ b/sys/dev/isci/scil/sci_base_memory_descriptor_list_decorator.c @@ -0,0 +1,149 @@ +/*- + * 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/** + * @file + * + * @brief This file contains the base implementation for the memory + * descriptor list decorator. The decorator adds additional + * functionality that may be used by SCI users to help + * offload MDE processing. + */ + +#include <dev/isci/scil/sci_memory_descriptor_list_decorator.h> + +U32 sci_mdl_decorator_get_memory_size( + SCI_MEMORY_DESCRIPTOR_LIST_HANDLE_T mdl, + U32 attributes +) +{ + U32 size = 0; + SCI_PHYSICAL_MEMORY_DESCRIPTOR_T * mde; + + sci_mdl_first_entry(mdl); + mde = sci_mdl_get_current_entry(mdl); + while (mde != NULL) + { + if ( (mde->constant_memory_attributes == attributes) + || (attributes == 0) ) + size += (mde->constant_memory_size + mde->constant_memory_alignment); + + sci_mdl_next_entry(mdl); + mde = sci_mdl_get_current_entry(mdl); + } + + return size; +} + +// --------------------------------------------------------------------------- + +void sci_mdl_decorator_assign_memory( + SCI_MEMORY_DESCRIPTOR_LIST_HANDLE_T mdl, + U32 attributes, + POINTER_UINT virtual_address, + SCI_PHYSICAL_ADDRESS sci_physical_address +) +{ + SCI_PHYSICAL_MEMORY_DESCRIPTOR_T * mde; + U64 physical_address; + + physical_address + = ((U64) sci_cb_physical_address_lower(sci_physical_address)) + | (((U64) sci_cb_physical_address_upper(sci_physical_address)) << 32); + + sci_mdl_first_entry(mdl); + mde = sci_mdl_get_current_entry(mdl); + while (mde != NULL) + { + // As long as the memory attribute for this MDE is equivalent to + // those supplied by the caller, then fill out the appropriate + // MDE fields. + if ( (mde->constant_memory_attributes == attributes) + || (attributes == 0) ) + { + // Ensure the virtual address alignment rules are met. + if ((virtual_address % mde->constant_memory_alignment) != 0) + { + virtual_address + += (mde->constant_memory_alignment - + (virtual_address % mde->constant_memory_alignment)); + } + + // Ensure the physical address alignment rules are met. + if ((physical_address % mde->constant_memory_alignment) != 0) + { + physical_address + += (mde->constant_memory_alignment - + (physical_address % mde->constant_memory_alignment)); + } + + // Update the MDE with properly aligned address values. + mde->virtual_address = (void *)virtual_address; + sci_cb_make_physical_address( + mde->physical_address, + (U32) (physical_address >> 32), + (U32) (physical_address & 0xFFFFFFFF) + ); + + virtual_address += mde->constant_memory_size; + physical_address += mde->constant_memory_size; + } + + // Move on to the next MDE + sci_mdl_next_entry(mdl); + mde = sci_mdl_get_current_entry (mdl); + } +} + |
