1 files changed, 89 insertions, 0 deletions
diff --git a/drivers/gpu/arm/utgard/linux/mali_memory_external.c b/drivers/gpu/arm/utgard/linux/mali_memory_external.c
new file mode 100644
index 000000000000..dcc9a7590885
--- /dev/null
+++ b/drivers/gpu/arm/utgard/linux/mali_memory_external.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2013-2015 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_osk.h"
+#include "mali_ukk.h"
+#include "mali_memory.h"
+#include "mali_mem_validation.h"
+#include "mali_uk_types.h"
+
+void mali_mem_unbind_ext_buf(mali_mem_backend *mem_backend)
+{
+	mali_mem_allocation *alloc;
+	struct mali_session_data *session;
+	MALI_DEBUG_ASSERT_POINTER(mem_backend);
+	alloc = mem_backend->mali_allocation;
+	MALI_DEBUG_ASSERT_POINTER(alloc);
+	MALI_DEBUG_ASSERT(MALI_MEM_EXTERNAL == mem_backend->type);
+
+	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);
+}
+
+_mali_osk_errcode_t mali_mem_bind_ext_buf(mali_mem_allocation *alloc,
+		mali_mem_backend *mem_backend,
+		u32 phys_addr,
+		u32 flag)
+{
+	struct mali_session_data *session;
+	_mali_osk_errcode_t err;
+	u32 virt, phys, size;
+	MALI_DEBUG_ASSERT_POINTER(mem_backend);
+	MALI_DEBUG_ASSERT_POINTER(alloc);
+	size = alloc->psize;
+	session = (struct mali_session_data *)(uintptr_t)alloc->session;
+	MALI_CHECK_NON_NULL(session, _MALI_OSK_ERR_INVALID_ARGS);
+
+	/* check arguments */
+	/* NULL might be a valid Mali address */
+	if (!size) MALI_ERROR(_MALI_OSK_ERR_INVALID_ARGS);
+
+	/* size must be a multiple of the system page size */
+	if (size % _MALI_OSK_MALI_PAGE_SIZE) MALI_ERROR(_MALI_OSK_ERR_INVALID_ARGS);
+
+	/* Validate the mali physical range */
+	if (_MALI_OSK_ERR_OK != mali_mem_validation_check(phys_addr, size)) {
+		return _MALI_OSK_ERR_FAULT;
+	}
+
+	if (flag & _MALI_MAP_EXTERNAL_MAP_GUARD_PAGE) {
+		alloc->flags |= MALI_MEM_FLAG_MALI_GUARD_PAGE;
+	}
+
+	mali_session_memory_lock(session);
+
+	virt = alloc->mali_vma_node.vm_node.start;
+	phys = phys_addr;
+
+	err = mali_mem_mali_map_prepare(alloc);
+	if (_MALI_OSK_ERR_OK != err) {
+		mali_session_memory_unlock(session);
+		return _MALI_OSK_ERR_NOMEM;
+	}
+
+	mali_mmu_pagedir_update(session->page_directory, virt, phys, size, MALI_MMU_FLAGS_DEFAULT);
+
+	if (alloc->flags & MALI_MEM_FLAG_MALI_GUARD_PAGE) {
+		mali_mmu_pagedir_update(session->page_directory, virt + size, phys, _MALI_OSK_MALI_PAGE_SIZE, MALI_MMU_FLAGS_DEFAULT);
+	}
+	MALI_DEBUG_PRINT(3,
+			 ("Requested to map physical memory 0x%x-0x%x into virtual memory 0x%x\n",
+			  phys_addr, (phys_addr + size - 1),
+			  virt));
+	mali_session_memory_unlock(session);
+
+	MALI_SUCCESS;
+}
+