1 files changed, 81 insertions, 0 deletions
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/memory_realloc.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/memory_realloc.c
new file mode 100644
index 0000000..e814f1b
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/memory_realloc.c
@@ -0,0 +1,81 @@
+/**
+Support for Intel Camera Imaging ISP subsystem.
+Copyright (c) 2010 - 2015, Intel Corporation.
+
+This program is free software; you can redistribute it and/or modify it
+under the terms and conditions of the GNU General Public License,
+version 2, as published by the Free Software Foundation.
+
+This program is distributed in the hope 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 "memory_realloc.h"
+#include "ia_css_debug.h"
+#include "ia_css_refcount.h"
+#include "memory_access.h"
+
+static bool realloc_isp_css_mm_buf(
+	hrt_vaddress *curr_buf,
+	size_t *curr_size,
+	size_t needed_size,
+	bool force,
+	enum ia_css_err *err,
+	uint16_t mmgr_attribute);
+
+
+bool reallocate_buffer(
+	hrt_vaddress *curr_buf,
+	size_t *curr_size,
+	size_t needed_size,
+	bool force,
+	enum ia_css_err *err)
+{
+	bool ret;
+	uint16_t	mmgr_attribute = MMGR_ATTRIBUTE_DEFAULT;
+
+	IA_CSS_ENTER_PRIVATE("void");
+
+	ret = realloc_isp_css_mm_buf(curr_buf,
+		curr_size, needed_size, force, err, mmgr_attribute);
+
+	IA_CSS_LEAVE_PRIVATE("ret=%d", ret);
+	return ret;
+}
+
+static bool realloc_isp_css_mm_buf(
+	hrt_vaddress *curr_buf,
+	size_t *curr_size,
+	size_t needed_size,
+	bool force,
+	enum ia_css_err *err,
+	uint16_t mmgr_attribute)
+{
+	int32_t id;
+
+	*err = IA_CSS_SUCCESS;
+	/* Possible optimization: add a function sh_css_isp_css_mm_realloc()
+	 * and implement on top of hmm. */
+
+	IA_CSS_ENTER_PRIVATE("void");
+
+	if (ia_css_refcount_is_single(*curr_buf) && !force && *curr_size >= needed_size) {
+		IA_CSS_LEAVE_PRIVATE("false");
+		return false;
+	}
+
+	id = IA_CSS_REFCOUNT_PARAM_BUFFER;
+	ia_css_refcount_decrement(id, *curr_buf);
+	*curr_buf = ia_css_refcount_increment(id, mmgr_alloc_attr(needed_size,
+							mmgr_attribute));
+
+	if (!*curr_buf) {
+		*err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
+		*curr_size = 0;
+	} else {
+		*curr_size = needed_size;
+	}
+	IA_CSS_LEAVE_PRIVATE("true");
+	return true;
+}