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-rw-r--r--drivers/gpu/mali400/r3p2/mali/common/mali_mem_validation.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/drivers/gpu/mali400/r3p2/mali/common/mali_mem_validation.c b/drivers/gpu/mali400/r3p2/mali/common/mali_mem_validation.c
new file mode 100644
index 0000000..fac6d93
--- /dev/null
+++ b/drivers/gpu/mali400/r3p2/mali/common/mali_mem_validation.c
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2011-2012 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_mem_validation.h"
+#include "mali_osk.h"
+#include "mali_kernel_common.h"
+/* MALI_SEC */
+#if defined(CONFIG_CPU_EXYNOS4212) || defined(CONFIG_CPU_EXYNOS4412)
+#ifndef CONFIG_MACH_KONA
+#define MALI_SEC_MEM_VALIDATION
+#endif
+#include <linux/cma.h>
+#include <plat/pd.h>
+#include <linux/platform_device.h>
+#endif
+
+#define MALI_INVALID_MEM_ADDR 0xFFFFFFFF
+
+typedef struct
+{
+ u32 phys_base; /**< Mali physical base of the memory, page aligned */
+ u32 size; /**< size in bytes of the memory, multiple of page size */
+} _mali_mem_validation_t;
+
+/* MALI_SEC */
+#if defined(MALI_SEC_MEM_VALIDATION)
+extern struct platform_device exynos4_device_pd[];
+#endif
+
+static _mali_mem_validation_t mali_mem_validator = { MALI_INVALID_MEM_ADDR, MALI_INVALID_MEM_ADDR };
+
+_mali_osk_errcode_t mali_mem_validation_add_range(u32 start, u32 size)
+{
+ /* MALI_SEC */
+#if defined(MALI_SEC_MEM_VALIDATION)
+ struct cma_info mem_info;
+#endif
+
+ /* Check that no other MEM_VALIDATION resources exist */
+ if (MALI_INVALID_MEM_ADDR != mali_mem_validator.phys_base)
+ {
+ MALI_PRINT_ERROR(("Failed to add frame buffer memory; another range is already specified\n"));
+ return _MALI_OSK_ERR_FAULT;
+ }
+
+ /* MALI_SEC */
+#if defined(MALI_SEC_MEM_VALIDATION)
+ if (cma_info(&mem_info, &exynos4_device_pd[PD_G3D].dev, "fimd")) {
+ MALI_PRINT_ERROR(("Failed to get framebuffer information from CMA\n"));
+ return _MALI_OSK_ERR_FAULT;
+ } else {
+ start = mem_info.lower_bound;
+ size = mem_info.total_size - mem_info.free_size;
+ }
+#endif
+
+ /* Check restrictions on page alignment */
+ if ((0 != (start & (~_MALI_OSK_CPU_PAGE_MASK))) ||
+ (0 != (size & (~_MALI_OSK_CPU_PAGE_MASK))))
+ {
+ MALI_PRINT_ERROR(("Failed to add frame buffer memory; incorrect alignment\n"));
+ return _MALI_OSK_ERR_FAULT;
+ }
+
+ mali_mem_validator.phys_base = start;
+ mali_mem_validator.size = size;
+ MALI_DEBUG_PRINT(2, ("Memory Validator installed for Mali physical address base=0x%08X, size=0x%08X\n",
+ mali_mem_validator.phys_base, mali_mem_validator.size));
+
+ return _MALI_OSK_ERR_OK;
+}
+
+_mali_osk_errcode_t mali_mem_validation_check(u32 phys_addr, u32 size)
+{
+ if (phys_addr < (phys_addr + size)) /* Don't allow overflow (or zero size) */
+ {
+ if ((0 == ( phys_addr & (~_MALI_OSK_CPU_PAGE_MASK))) &&
+ (0 == ( size & (~_MALI_OSK_CPU_PAGE_MASK))))
+ {
+ if ((phys_addr >= mali_mem_validator.phys_base) &&
+ ((phys_addr + (size - 1)) >= mali_mem_validator.phys_base) &&
+ (phys_addr <= (mali_mem_validator.phys_base + (mali_mem_validator.size - 1))) &&
+ ((phys_addr + (size - 1)) <= (mali_mem_validator.phys_base + (mali_mem_validator.size - 1))) )
+ {
+ MALI_DEBUG_PRINT(3, ("Accepted range 0x%08X + size 0x%08X (= 0x%08X)\n", phys_addr, size, (phys_addr + size - 1)));
+ return _MALI_OSK_ERR_OK;
+ }
+ }
+ }
+
+ MALI_PRINT_ERROR(("MALI PHYSICAL RANGE VALIDATION ERROR: The range supplied was: phys_base=0x%08X, size=0x%08X\n", phys_addr, size));
+
+ return _MALI_OSK_ERR_FAULT;
+}