--- /dev/null
+/*
+ * Copyright (C) 2010-2016 ARM Limited. All rights reserved.
+ *
+ * This program is free software and is provided to you under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
+ *
+ * A copy of the licence is included with the program, and can also be obtained from Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "mali_kernel_common.h"
+#include "mali_memory.h"
+#include "mali_memory_secure.h"
+#include "mali_osk.h"
+#include <linux/mutex.h>
+#include <linux/dma-mapping.h>
+#include <linux/dma-buf.h>
+
+_mali_osk_errcode_t mali_mem_secure_attach_dma_buf(mali_mem_secure *secure_mem, u32 size, int mem_fd)
+{
+ struct dma_buf *buf;
+ MALI_DEBUG_ASSERT_POINTER(secure_mem);
+
+ /* get dma buffer */
+ buf = dma_buf_get(mem_fd);
+ if (IS_ERR_OR_NULL(buf)) {
+ MALI_DEBUG_PRINT_ERROR(("Failed to get dma buf!\n"));
+ return _MALI_OSK_ERR_FAULT;
+ }
+
+ if (size != buf->size) {
+ MALI_DEBUG_PRINT_ERROR(("The secure mem size not match to the dma buf size!\n"));
+ goto failed_alloc_mem;
+ }
+
+ secure_mem->buf = buf;
+ secure_mem->attachment = dma_buf_attach(secure_mem->buf, &mali_platform_device->dev);
+ if (NULL == secure_mem->attachment) {
+ MALI_DEBUG_PRINT_ERROR(("Failed to get dma buf attachment!\n"));
+ goto failed_dma_attach;
+ }
+
+ secure_mem->sgt = dma_buf_map_attachment(secure_mem->attachment, DMA_BIDIRECTIONAL);
+ if (IS_ERR_OR_NULL(secure_mem->sgt)) {
+ MALI_DEBUG_PRINT_ERROR(("Failed to map dma buf attachment\n"));
+ goto failed_dma_map;
+ }
+
+ secure_mem->count = size / MALI_MMU_PAGE_SIZE;
+
+ return _MALI_OSK_ERR_OK;
+
+failed_dma_map:
+ dma_buf_detach(secure_mem->buf, secure_mem->attachment);
+failed_dma_attach:
+failed_alloc_mem:
+ dma_buf_put(buf);
+ return _MALI_OSK_ERR_FAULT;
+}
+
+_mali_osk_errcode_t mali_mem_secure_mali_map(mali_mem_secure *secure_mem, struct mali_session_data *session, u32 vaddr, u32 props)
+{
+ struct mali_page_directory *pagedir;
+ struct scatterlist *sg;
+ u32 virt = vaddr;
+ u32 prop = props;
+ int i;
+
+ MALI_DEBUG_ASSERT_POINTER(secure_mem);
+ MALI_DEBUG_ASSERT_POINTER(secure_mem->sgt);
+ MALI_DEBUG_ASSERT_POINTER(session);
+
+ pagedir = session->page_directory;
+
+ for_each_sg(secure_mem->sgt->sgl, sg, secure_mem->sgt->nents, i) {
+ u32 size = sg_dma_len(sg);
+ dma_addr_t phys = sg_dma_address(sg);
+
+ /* sg must be page aligned. */
+ MALI_DEBUG_ASSERT(0 == size % MALI_MMU_PAGE_SIZE);
+ MALI_DEBUG_ASSERT(0 == (phys & ~(uintptr_t)0xFFFFFFFF));
+
+ mali_mmu_pagedir_update(pagedir, virt, phys, size, prop);
+
+ MALI_DEBUG_PRINT(3, ("The secure mem physical address: 0x%x gpu virtual address: 0x%x! \n", phys, virt));
+ virt += size;
+ }
+
+ return _MALI_OSK_ERR_OK;
+}
+
+void mali_mem_secure_mali_unmap(mali_mem_allocation *alloc)
+{
+ struct mali_session_data *session;
+ MALI_DEBUG_ASSERT_POINTER(alloc);
+ session = alloc->session;
+ MALI_DEBUG_ASSERT_POINTER(session);
+
+ mali_session_memory_lock(session);
+ mali_mem_mali_map_free(session, alloc->psize, alloc->mali_vma_node.vm_node.start,
+ alloc->flags);
+ mali_session_memory_unlock(session);
+}
+
+
+int mali_mem_secure_cpu_map(mali_mem_backend *mem_bkend, struct vm_area_struct *vma)
+{
+
+ int ret = 0;
+ struct scatterlist *sg;
+ mali_mem_secure *secure_mem = &mem_bkend->secure_mem;
+ unsigned long addr = vma->vm_start;
+ int i;
+
+ MALI_DEBUG_ASSERT(mem_bkend->type == MALI_MEM_SECURE);
+
+ for_each_sg(secure_mem->sgt->sgl, sg, secure_mem->sgt->nents, i) {
+ phys_addr_t phys;
+ dma_addr_t dev_addr;
+ u32 size, j;
+ dev_addr = sg_dma_address(sg);
+#if defined(CONFIG_ARM64) ||LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)
+ phys = dma_to_phys(&mali_platform_device->dev, dev_addr);
+#else
+ phys = page_to_phys(pfn_to_page(dma_to_pfn(&mali_platform_device->dev, dev_addr)));
+#endif
+ size = sg_dma_len(sg);
+ MALI_DEBUG_ASSERT(0 == size % _MALI_OSK_MALI_PAGE_SIZE);
+
+ for (j = 0; j < size / _MALI_OSK_MALI_PAGE_SIZE; j++) {
+ ret = vm_insert_pfn(vma, addr, PFN_DOWN(phys));
+
+ if (unlikely(0 != ret)) {
+ return -EFAULT;
+ }
+ addr += _MALI_OSK_MALI_PAGE_SIZE;
+ phys += _MALI_OSK_MALI_PAGE_SIZE;
+
+ MALI_DEBUG_PRINT(3, ("The secure mem physical address: 0x%x , cpu virtual address: 0x%x! \n", phys, addr));
+ }
+ }
+ return ret;
+}
+
+u32 mali_mem_secure_release(mali_mem_backend *mem_bkend)
+{
+ struct mali_mem_secure *mem;
+ mali_mem_allocation *alloc = mem_bkend->mali_allocation;
+ u32 free_pages_nr = 0;
+ MALI_DEBUG_ASSERT(mem_bkend->type == MALI_MEM_SECURE);
+
+ mem = &mem_bkend->secure_mem;
+ MALI_DEBUG_ASSERT_POINTER(mem->attachment);
+ MALI_DEBUG_ASSERT_POINTER(mem->buf);
+ MALI_DEBUG_ASSERT_POINTER(mem->sgt);
+ /* Unmap the memory from the mali virtual address space. */
+ mali_mem_secure_mali_unmap(alloc);
+ mutex_lock(&mem_bkend->mutex);
+ dma_buf_unmap_attachment(mem->attachment, mem->sgt, DMA_BIDIRECTIONAL);
+ dma_buf_detach(mem->buf, mem->attachment);
+ dma_buf_put(mem->buf);
+ mutex_unlock(&mem_bkend->mutex);
+
+ free_pages_nr = mem->count;
+
+ return free_pages_nr;
+}
+
+
projects / firefly-linux-kernel-4.4.55.git / blobdiff