336 lines
10 KiB
C
336 lines
10 KiB
C
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/******************************************************************************
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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) 2012 - 2014 Intel Corporation. All rights reserved.
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* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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* Copyright(c) 2016 - 2017 Intel Deutschland GmbH
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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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* The full GNU General Public License is included in this distribution
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* in the file called COPYING.
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*
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* Contact Information:
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* Intel Linux Wireless <linuxwifi@intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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* BSD LICENSE
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*
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* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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* Copyright(c) 2016 - 2017 Intel Deutschland GmbH
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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 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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*****************************************************************************/
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#include "iwl-drv.h"
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#include "runtime.h"
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#include "fw/api/commands.h"
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void iwl_free_fw_paging(struct iwl_fw_runtime *fwrt)
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{
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int i;
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if (!fwrt->fw_paging_db[0].fw_paging_block)
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return;
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for (i = 0; i < NUM_OF_FW_PAGING_BLOCKS; i++) {
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struct iwl_fw_paging *paging = &fwrt->fw_paging_db[i];
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if (!paging->fw_paging_block) {
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IWL_DEBUG_FW(fwrt,
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"Paging: block %d already freed, continue to next page\n",
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i);
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continue;
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}
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dma_unmap_page(fwrt->trans->dev, paging->fw_paging_phys,
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paging->fw_paging_size, DMA_BIDIRECTIONAL);
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__free_pages(paging->fw_paging_block,
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get_order(paging->fw_paging_size));
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paging->fw_paging_block = NULL;
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}
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memset(fwrt->fw_paging_db, 0, sizeof(fwrt->fw_paging_db));
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}
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IWL_EXPORT_SYMBOL(iwl_free_fw_paging);
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static int iwl_alloc_fw_paging_mem(struct iwl_fw_runtime *fwrt,
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const struct fw_img *image)
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{
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struct page *block;
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dma_addr_t phys = 0;
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int blk_idx, order, num_of_pages, size;
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if (fwrt->fw_paging_db[0].fw_paging_block)
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return 0;
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/* ensure BLOCK_2_EXP_SIZE is power of 2 of PAGING_BLOCK_SIZE */
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BUILD_BUG_ON(BIT(BLOCK_2_EXP_SIZE) != PAGING_BLOCK_SIZE);
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num_of_pages = image->paging_mem_size / FW_PAGING_SIZE;
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fwrt->num_of_paging_blk =
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DIV_ROUND_UP(num_of_pages, NUM_OF_PAGE_PER_GROUP);
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fwrt->num_of_pages_in_last_blk =
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num_of_pages -
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NUM_OF_PAGE_PER_GROUP * (fwrt->num_of_paging_blk - 1);
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IWL_DEBUG_FW(fwrt,
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"Paging: allocating mem for %d paging blocks, each block holds 8 pages, last block holds %d pages\n",
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fwrt->num_of_paging_blk,
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fwrt->num_of_pages_in_last_blk);
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/*
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* Allocate CSS and paging blocks in dram.
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*/
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for (blk_idx = 0; blk_idx < fwrt->num_of_paging_blk + 1; blk_idx++) {
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/* For CSS allocate 4KB, for others PAGING_BLOCK_SIZE (32K) */
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size = blk_idx ? PAGING_BLOCK_SIZE : FW_PAGING_SIZE;
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order = get_order(size);
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block = alloc_pages(GFP_KERNEL, order);
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if (!block) {
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/* free all the previous pages since we failed */
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iwl_free_fw_paging(fwrt);
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return -ENOMEM;
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}
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fwrt->fw_paging_db[blk_idx].fw_paging_block = block;
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fwrt->fw_paging_db[blk_idx].fw_paging_size = size;
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phys = dma_map_page(fwrt->trans->dev, block, 0,
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PAGE_SIZE << order,
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DMA_BIDIRECTIONAL);
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if (dma_mapping_error(fwrt->trans->dev, phys)) {
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/*
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* free the previous pages and the current one
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* since we failed to map_page.
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*/
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iwl_free_fw_paging(fwrt);
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return -ENOMEM;
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}
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fwrt->fw_paging_db[blk_idx].fw_paging_phys = phys;
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if (!blk_idx)
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IWL_DEBUG_FW(fwrt,
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"Paging: allocated 4K(CSS) bytes (order %d) for firmware paging.\n",
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order);
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else
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IWL_DEBUG_FW(fwrt,
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"Paging: allocated 32K bytes (order %d) for firmware paging.\n",
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order);
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}
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return 0;
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}
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static int iwl_fill_paging_mem(struct iwl_fw_runtime *fwrt,
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const struct fw_img *image)
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{
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int sec_idx, idx;
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u32 offset = 0;
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/*
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* find where is the paging image start point:
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* if CPU2 exist and it's in paging format, then the image looks like:
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* CPU1 sections (2 or more)
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* CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between CPU1 to CPU2
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* CPU2 sections (not paged)
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* PAGING_SEPARATOR_SECTION delimiter - separate between CPU2
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* non paged to CPU2 paging sec
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* CPU2 paging CSS
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* CPU2 paging image (including instruction and data)
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*/
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for (sec_idx = 0; sec_idx < image->num_sec; sec_idx++) {
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if (image->sec[sec_idx].offset == PAGING_SEPARATOR_SECTION) {
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sec_idx++;
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break;
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}
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}
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/*
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* If paging is enabled there should be at least 2 more sections left
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* (one for CSS and one for Paging data)
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*/
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if (sec_idx >= image->num_sec - 1) {
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IWL_ERR(fwrt, "Paging: Missing CSS and/or paging sections\n");
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iwl_free_fw_paging(fwrt);
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return -EINVAL;
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}
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/* copy the CSS block to the dram */
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IWL_DEBUG_FW(fwrt, "Paging: load paging CSS to FW, sec = %d\n",
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sec_idx);
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memcpy(page_address(fwrt->fw_paging_db[0].fw_paging_block),
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image->sec[sec_idx].data,
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fwrt->fw_paging_db[0].fw_paging_size);
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dma_sync_single_for_device(fwrt->trans->dev,
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fwrt->fw_paging_db[0].fw_paging_phys,
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fwrt->fw_paging_db[0].fw_paging_size,
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DMA_BIDIRECTIONAL);
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IWL_DEBUG_FW(fwrt,
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"Paging: copied %d CSS bytes to first block\n",
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fwrt->fw_paging_db[0].fw_paging_size);
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sec_idx++;
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/*
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* copy the paging blocks to the dram
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* loop index start from 1 since that CSS block already copied to dram
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* and CSS index is 0.
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* loop stop at num_of_paging_blk since that last block is not full.
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*/
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for (idx = 1; idx < fwrt->num_of_paging_blk; idx++) {
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struct iwl_fw_paging *block = &fwrt->fw_paging_db[idx];
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memcpy(page_address(block->fw_paging_block),
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image->sec[sec_idx].data + offset,
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block->fw_paging_size);
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dma_sync_single_for_device(fwrt->trans->dev,
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block->fw_paging_phys,
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block->fw_paging_size,
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DMA_BIDIRECTIONAL);
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IWL_DEBUG_FW(fwrt,
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"Paging: copied %d paging bytes to block %d\n",
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fwrt->fw_paging_db[idx].fw_paging_size,
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idx);
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offset += fwrt->fw_paging_db[idx].fw_paging_size;
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}
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/* copy the last paging block */
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if (fwrt->num_of_pages_in_last_blk > 0) {
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struct iwl_fw_paging *block = &fwrt->fw_paging_db[idx];
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memcpy(page_address(block->fw_paging_block),
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image->sec[sec_idx].data + offset,
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FW_PAGING_SIZE * fwrt->num_of_pages_in_last_blk);
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dma_sync_single_for_device(fwrt->trans->dev,
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block->fw_paging_phys,
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block->fw_paging_size,
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DMA_BIDIRECTIONAL);
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IWL_DEBUG_FW(fwrt,
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"Paging: copied %d pages in the last block %d\n",
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fwrt->num_of_pages_in_last_blk, idx);
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}
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return 0;
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}
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static int iwl_save_fw_paging(struct iwl_fw_runtime *fwrt,
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const struct fw_img *fw)
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{
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int ret;
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ret = iwl_alloc_fw_paging_mem(fwrt, fw);
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if (ret)
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return ret;
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return iwl_fill_paging_mem(fwrt, fw);
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}
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/* send paging cmd to FW in case CPU2 has paging image */
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static int iwl_send_paging_cmd(struct iwl_fw_runtime *fwrt,
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const struct fw_img *fw)
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{
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struct iwl_fw_paging_cmd paging_cmd = {
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.flags = cpu_to_le32(PAGING_CMD_IS_SECURED |
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PAGING_CMD_IS_ENABLED |
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(fwrt->num_of_pages_in_last_blk <<
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PAGING_CMD_NUM_OF_PAGES_IN_LAST_GRP_POS)),
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.block_size = cpu_to_le32(BLOCK_2_EXP_SIZE),
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.block_num = cpu_to_le32(fwrt->num_of_paging_blk),
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};
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struct iwl_host_cmd hcmd = {
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.id = iwl_cmd_id(FW_PAGING_BLOCK_CMD, IWL_ALWAYS_LONG_GROUP, 0),
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.len = { sizeof(paging_cmd), },
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.data = { &paging_cmd, },
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};
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int blk_idx;
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/* loop for for all paging blocks + CSS block */
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for (blk_idx = 0; blk_idx < fwrt->num_of_paging_blk + 1; blk_idx++) {
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dma_addr_t addr = fwrt->fw_paging_db[blk_idx].fw_paging_phys;
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__le32 phy_addr;
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addr = addr >> PAGE_2_EXP_SIZE;
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phy_addr = cpu_to_le32(addr);
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paging_cmd.device_phy_addr[blk_idx] = phy_addr;
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}
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return iwl_trans_send_cmd(fwrt->trans, &hcmd);
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}
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int iwl_init_paging(struct iwl_fw_runtime *fwrt, enum iwl_ucode_type type)
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{
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const struct fw_img *fw = &fwrt->fw->img[type];
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int ret;
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if (fwrt->trans->cfg->gen2)
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return 0;
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/*
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* Configure and operate fw paging mechanism.
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* The driver configures the paging flow only once.
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* The CPU2 paging image is included in the IWL_UCODE_INIT image.
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*/
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if (!fw->paging_mem_size)
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return 0;
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ret = iwl_save_fw_paging(fwrt, fw);
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if (ret) {
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IWL_ERR(fwrt, "failed to save the FW paging image\n");
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return ret;
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}
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ret = iwl_send_paging_cmd(fwrt, fw);
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if (ret) {
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IWL_ERR(fwrt, "failed to send the paging cmd\n");
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iwl_free_fw_paging(fwrt);
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return ret;
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}
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return 0;
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}
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IWL_EXPORT_SYMBOL(iwl_init_paging);
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