1 files changed, 124 insertions, 0 deletions
diff --git a/drivers/staging/media/atomisp/pci/hrt/hive_isp_css_mm_hrt.c b/drivers/staging/media/atomisp/pci/hrt/hive_isp_css_mm_hrt.c
new file mode 100644
index 000000000000..236f27b50386
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/hrt/hive_isp_css_mm_hrt.c
@@ -0,0 +1,124 @@
+/*
+ * Support for Medifield PNW Camera Imaging ISP subsystem.
+ *
+ * Copyright (c) 2010 Intel Corporation. All Rights Reserved.
+ *
+ * Copyright (c) 2010 Silicon Hive www.siliconhive.com.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ *
+ */
+
+#include "atomisp_internal.h"
+
+#include "hive_isp_css_mm_hrt.h"
+#include "hmm/hmm.h"
+
+#define __page_align(size)	(((size) + (PAGE_SIZE - 1)) & (~(PAGE_SIZE - 1)))
+
+static void __user *my_userptr;
+static unsigned int my_num_pages;
+static enum hrt_userptr_type my_usr_type;
+
+void hrt_isp_css_mm_set_user_ptr(void __user *userptr,
+				 unsigned int num_pages,
+				 enum hrt_userptr_type type)
+{
+	my_userptr = userptr;
+	my_num_pages = num_pages;
+	my_usr_type = type;
+}
+
+static ia_css_ptr __hrt_isp_css_mm_alloc(size_t bytes,
+	const void __user *userptr,
+	unsigned int num_pages,
+	enum hrt_userptr_type type,
+	bool cached)
+{
+#ifdef CONFIG_ION
+	if (type == HRT_USR_ION)
+		return hmm_alloc(bytes, HMM_BO_ION, 0,
+				 userptr, cached);
+
+#endif
+	if (type == HRT_USR_PTR) {
+		if (!userptr)
+			return hmm_alloc(bytes, HMM_BO_PRIVATE, 0,
+					 NULL, cached);
+		else {
+			if (num_pages < ((__page_align(bytes)) >> PAGE_SHIFT))
+				dev_err(atomisp_dev,
+					"user space memory size is less than the expected size..\n");
+			else if (num_pages > ((__page_align(bytes))
+					      >> PAGE_SHIFT))
+				dev_err(atomisp_dev,
+					"user space memory size is large than the expected size..\n");
+
+			return hmm_alloc(bytes, HMM_BO_USER, 0,
+					 userptr, cached);
+		}
+	} else {
+		dev_err(atomisp_dev, "user ptr type is incorrect.\n");
+		return 0;
+	}
+}
+
+ia_css_ptr hrt_isp_css_mm_alloc(size_t bytes)
+{
+	return __hrt_isp_css_mm_alloc(bytes, my_userptr,
+				      my_num_pages, my_usr_type, false);
+}
+
+ia_css_ptr hrt_isp_css_mm_alloc_user_ptr(size_t bytes,
+	const void __user *userptr,
+	unsigned int num_pages,
+	enum hrt_userptr_type type,
+	bool cached)
+{
+	return __hrt_isp_css_mm_alloc(bytes, userptr, num_pages,
+				      type, cached);
+}
+
+ia_css_ptr hrt_isp_css_mm_alloc_cached(size_t bytes)
+{
+	if (!my_userptr)
+		return hmm_alloc(bytes, HMM_BO_PRIVATE, 0, NULL,
+				 HMM_CACHED);
+	else {
+		if (my_num_pages < ((__page_align(bytes)) >> PAGE_SHIFT))
+			dev_err(atomisp_dev,
+				"user space memory size is less than the expected size..\n");
+		else if (my_num_pages > ((__page_align(bytes)) >> PAGE_SHIFT))
+			dev_err(atomisp_dev,
+				"user space memory size is large than the expected size..\n");
+
+		return hmm_alloc(bytes, HMM_BO_USER, 0,
+				 my_userptr, HMM_CACHED);
+	}
+}
+
+ia_css_ptr hrt_isp_css_mm_calloc(size_t bytes)
+{
+	ia_css_ptr ptr = hrt_isp_css_mm_alloc(bytes);
+
+	if (ptr)
+		hmm_set(ptr, 0, bytes);
+	return ptr;
+}
+
+ia_css_ptr hrt_isp_css_mm_calloc_cached(size_t bytes)
+{
+	ia_css_ptr ptr = hrt_isp_css_mm_alloc_cached(bytes);
+
+	if (ptr)
+		hmm_set(ptr, 0, bytes);
+	return ptr;
+}