1 files changed, 65 insertions, 0 deletions
diff --git a/drivers/gpu/mali/ump/linux/ump_memory_backend.c b/drivers/gpu/mali/ump/linux/ump_memory_backend.c
new file mode 100644
index 00000000..b0915435
--- /dev/null
+++ b/drivers/gpu/mali/ump/linux/ump_memory_backend.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2010, 2013-2014 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 <linux/module.h>            /* kernel module definitions */
+#include <linux/ioport.h>            /* request_mem_region */
+
+#include "arch/config.h"             /* Configuration for current platform. The symlink for arch is set by Makefile */
+
+#include "ump_osk.h"
+#include "ump_kernel_common.h"
+#include "ump_kernel_memory_backend_os.h"
+#include "ump_kernel_memory_backend_dedicated.h"
+
+/* Configure which dynamic memory allocator to use */
+int ump_backend = ARCH_UMP_BACKEND_DEFAULT;
+module_param(ump_backend, int, S_IRUGO); /* r--r--r-- */
+MODULE_PARM_DESC(ump_backend, "0 = dedicated memory backend (default), 1 = OS memory backend");
+
+/* The base address of the memory block for the dedicated memory backend */
+unsigned int ump_memory_address = ARCH_UMP_MEMORY_ADDRESS_DEFAULT;
+module_param(ump_memory_address, uint, S_IRUGO); /* r--r--r-- */
+MODULE_PARM_DESC(ump_memory_address, "The physical address to map for the dedicated memory backend");
+
+/* The size of the memory block for the dedicated memory backend */
+unsigned int ump_memory_size = ARCH_UMP_MEMORY_SIZE_DEFAULT;
+module_param(ump_memory_size, uint, S_IRUGO); /* r--r--r-- */
+MODULE_PARM_DESC(ump_memory_size, "The size of fixed memory to map in the dedicated memory backend");
+
+ump_memory_backend *ump_memory_backend_create(void)
+{
+	ump_memory_backend *backend = NULL;
+
+	/* Create the dynamic memory allocator backend */
+	if (0 == ump_backend) {
+		DBG_MSG(2, ("Using dedicated memory backend\n"));
+
+		DBG_MSG(2, ("Requesting dedicated memory: 0x%08x, size: %u\n", ump_memory_address, ump_memory_size));
+		/* Ask the OS if we can use the specified physical memory */
+		if (NULL == request_mem_region(ump_memory_address, ump_memory_size, "UMP Memory")) {
+			MSG_ERR(("Failed to request memory region (0x%08X - 0x%08X). Is Mali DD already loaded?\n", ump_memory_address, ump_memory_address + ump_memory_size - 1));
+			return NULL;
+		}
+		backend = ump_block_allocator_create(ump_memory_address, ump_memory_size);
+	} else if (1 == ump_backend) {
+		DBG_MSG(2, ("Using OS memory backend, allocation limit: %d\n", ump_memory_size));
+		backend = ump_os_memory_backend_create(ump_memory_size);
+	}
+
+	return backend;
+}
+
+void ump_memory_backend_destroy(void)
+{
+	if (0 == ump_backend) {
+		DBG_MSG(2, ("Releasing dedicated memory: 0x%08x\n", ump_memory_address));
+		release_mem_region(ump_memory_address, ump_memory_size);
+	}
+}