108 lines
2.9 KiB
C
Executable File
108 lines
2.9 KiB
C
Executable File
/*
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* Copyright (C) 2012-2016 Samsung Electronics, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/errno.h> /* cma.h needs this */
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#if defined(CONFIG_DMA_CMA)
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#include <linux/dma-mapping.h>
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#include <linux/dma-contiguous.h>
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#elif defined(CONFIG_CMA)
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#include <linux/cma.h>
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#endif
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#include <linux/dma-mapping.h>
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#include <linux/device.h>
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#include <linux/highmem.h>
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#include <linux/mm.h>
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#include "sysdep.h"
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#include "tzdev.h"
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static dma_addr_t tzdev_cma_addr = 0;
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#if defined(CONFIG_DMA_CMA)
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static struct page *tzdev_page = NULL;
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#endif /* CONFIG_DMA_CMA */
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int tzdev_cma_mem_register(void)
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{
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void *ptr;
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struct page *p;
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unsigned long pfn;
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if (!tzdev_cma_addr)
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return 0;
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for (pfn = __phys_to_pfn(tzdev_cma_addr);
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pfn < __phys_to_pfn(tzdev_cma_addr +
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CONFIG_TZDEV_MEMRESSZ - CONFIG_TZDEV_MEMRESSZPROT);
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pfn++) {
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p = pfn_to_page(pfn);
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ptr = kmap(p);
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/*
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* We can just invalidate here, but kernel doesn't
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* export cache invalidation functions.
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*/
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__flush_dcache_area(ptr, PAGE_SIZE);
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kunmap(p);
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}
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outer_inv_range(tzdev_cma_addr, tzdev_cma_addr +
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CONFIG_TZDEV_MEMRESSZ - CONFIG_TZDEV_MEMRESSZPROT);
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return tzdev_smc_mem_reg((unsigned long)__phys_to_pfn(tzdev_cma_addr),
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(unsigned long)(get_order(CONFIG_TZDEV_MEMRESSZ) + PAGE_SHIFT));
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}
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void tzdev_cma_mem_init(struct device *dev)
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{
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#if defined(CONFIG_DMA_CMA)
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static struct page *tzdev_page = NULL;
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tzdev_page = dma_alloc_from_contiguous(dev,
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(CONFIG_TZDEV_MEMRESSZ - CONFIG_TZDEV_MEMRESSZPROT) >> PAGE_SHIFT,
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get_order(CONFIG_TZDEV_MEMRESSZ));
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if (!tzdev_page) {
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tzdev_print(0, "Allocation CMA region failed;"
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" Memory will not be registered in SWd\n");
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return;
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}
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tzdev_cma_addr = page_to_phys(tzdev_page);
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#elif defined(CONFIG_CMA)
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struct cma_info tzdev_cma_info;
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if (cma_info(&tzdev_cma_info, dev, NULL) < 0) {
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tzdev_print(0, "Getting CMA info failed;"
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" Memory will not be registered in SWd\n");
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return;
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}
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tzdev_cma_addr = cma_alloc(dev, NULL,
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tzdev_cma_info.total_size, 0);
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#endif /* CONFIG_CMA */
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if (!tzdev_cma_addr || IS_ERR_VALUE(tzdev_cma_addr)) {
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tzdev_print(0, "Allocation CMA region failed;"
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" Memory will not be registered in SWd\n");
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return;
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}
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}
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void tzdev_cma_mem_release(struct device *dev)
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{
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if (tzdev_cma_addr) {
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#if defined(CONFIG_DMA_CMA)
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dma_release_from_contiguous(dev, tzdev_page,
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(CONFIG_TZDEV_MEMRESSZ - CONFIG_TZDEV_MEMRESSZPROT) >> PAGE_SHIFT);
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#elif defined(CONFIG_CMA)
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cma_free(tzdev_cma_addr);
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#endif
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}
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tzdev_cma_addr = 0;
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}
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