1 files changed, 146 insertions, 0 deletions
diff --git a/drivers/gpu/arm/utgard/linux/mali_osk_low_level_mem.c b/drivers/gpu/arm/utgard/linux/mali_osk_low_level_mem.c
new file mode 100644
index 000000000000..c14e872a7d63
--- /dev/null
+++ b/drivers/gpu/arm/utgard/linux/mali_osk_low_level_mem.c
@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2010-2015 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.
+ */
+
+/**
+ * @file mali_osk_low_level_mem.c
+ * Implementation of the OS abstraction layer for the kernel device driver
+ */
+
+#include <asm/io.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+
+#include "mali_kernel_common.h"
+#include "mali_osk.h"
+#include "mali_ukk.h"
+
+void _mali_osk_mem_barrier(void)
+{
+	mb();
+}
+
+void _mali_osk_write_mem_barrier(void)
+{
+	wmb();
+}
+
+mali_io_address _mali_osk_mem_mapioregion(uintptr_t phys, u32 size, const char *description)
+{
+	return (mali_io_address)ioremap_nocache(phys, size);
+}
+
+void _mali_osk_mem_unmapioregion(uintptr_t phys, u32 size, mali_io_address virt)
+{
+	iounmap((void *)virt);
+}
+
+_mali_osk_errcode_t inline _mali_osk_mem_reqregion(uintptr_t phys, u32 size, const char *description)
+{
+#if MALI_LICENSE_IS_GPL
+	return _MALI_OSK_ERR_OK; /* GPL driver gets the mem region for the resources registered automatically */
+#else
+	return ((NULL == request_mem_region(phys, size, description)) ? _MALI_OSK_ERR_NOMEM : _MALI_OSK_ERR_OK);
+#endif
+}
+
+void inline _mali_osk_mem_unreqregion(uintptr_t phys, u32 size)
+{
+#if !MALI_LICENSE_IS_GPL
+	release_mem_region(phys, size);
+#endif
+}
+
+void inline _mali_osk_mem_iowrite32_relaxed(volatile mali_io_address addr, u32 offset, u32 val)
+{
+	__raw_writel(cpu_to_le32(val), ((u8 *)addr) + offset);
+}
+
+u32 inline _mali_osk_mem_ioread32(volatile mali_io_address addr, u32 offset)
+{
+	return ioread32(((u8 *)addr) + offset);
+}
+
+void inline _mali_osk_mem_iowrite32(volatile mali_io_address addr, u32 offset, u32 val)
+{
+	iowrite32(val, ((u8 *)addr) + offset);
+}
+
+void _mali_osk_cache_flushall(void)
+{
+	/** @note Cached memory is not currently supported in this implementation */
+}
+
+void _mali_osk_cache_ensure_uncached_range_flushed(void *uncached_mapping, u32 offset, u32 size)
+{
+	_mali_osk_write_mem_barrier();
+}
+
+u32 _mali_osk_mem_write_safe(void __user *dest, const void __user *src, u32 size)
+{
+#define MALI_MEM_SAFE_COPY_BLOCK_SIZE 4096
+	u32 retval = 0;
+	void *temp_buf;
+
+	temp_buf = kmalloc(MALI_MEM_SAFE_COPY_BLOCK_SIZE, GFP_KERNEL);
+	if (NULL != temp_buf) {
+		u32 bytes_left_to_copy = size;
+		u32 i;
+		for (i = 0; i < size; i += MALI_MEM_SAFE_COPY_BLOCK_SIZE) {
+			u32 size_to_copy;
+			u32 size_copied;
+			u32 bytes_left;
+
+			if (bytes_left_to_copy > MALI_MEM_SAFE_COPY_BLOCK_SIZE) {
+				size_to_copy = MALI_MEM_SAFE_COPY_BLOCK_SIZE;
+			} else {
+				size_to_copy = bytes_left_to_copy;
+			}
+
+			bytes_left = copy_from_user(temp_buf, ((char *)src) + i, size_to_copy);
+			size_copied = size_to_copy - bytes_left;
+
+			bytes_left = copy_to_user(((char *)dest) + i, temp_buf, size_copied);
+			size_copied -= bytes_left;
+
+			bytes_left_to_copy -= size_copied;
+			retval += size_copied;
+
+			if (size_copied != size_to_copy) {
+				break; /* Early out, we was not able to copy this entire block */
+			}
+		}
+
+		kfree(temp_buf);
+	}
+
+	return retval;
+}
+
+_mali_osk_errcode_t _mali_ukk_mem_write_safe(_mali_uk_mem_write_safe_s *args)
+{
+	void __user *src;
+	void __user *dst;
+	struct mali_session_data *session;
+
+	MALI_DEBUG_ASSERT_POINTER(args);
+
+	session = (struct mali_session_data *)(uintptr_t)args->ctx;
+
+	if (NULL == session) {
+		return _MALI_OSK_ERR_INVALID_ARGS;
+	}
+
+	src = (void __user *)(uintptr_t)args->src;
+	dst = (void __user *)(uintptr_t)args->dest;
+
+	/* Return number of bytes actually copied */
+	args->size = _mali_osk_mem_write_safe(dst, src, args->size);
+	return _MALI_OSK_ERR_OK;
+}