[PATCH 004/115] ion: Add reserve function to ion

John Stultz
2013-12-13T22:50:45Z

From: Rebecca Schultz Zavin <rebecca@android.com>

Rather than requiring each platform call memblock_remove or reserve
from the board file, add this to ion

Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
[jstultz: modified patch to apply to staging directory]
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
drivers/staging/android/ion/ion.c | 17 +++++++++++++++++
drivers/staging/android/ion/ion.h | 11 +++++++++++
2 files changed, 28 insertions(+)

diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c
index bca8d9e..004c0d4 100644
--- a/drivers/staging/android/ion/ion.c
+++ b/drivers/staging/android/ion/ion.c
@@ -19,6 +19,7 @@
#include <linux/fs.h>
#include <linux/anon_inodes.h>
#include <linux/list.h>
+#include <linux/memblock.h>
#include <linux/miscdevice.h>
#include <linux/export.h>
#include <linux/mm.h>
@@ -1185,3 +1186,19 @@ void ion_device_destroy(struct ion_device *dev)
/* XXX need to free the heaps and clients ? */
kfree(dev);
}
+
+void __init ion_reserve(struct ion_platform_data *data)
+{
+ int i, ret;
+
+ for (i = 0; i < data->nr; i++) {
+ if (data->heaps[i].size == 0)
+ continue;
+ ret = memblock_reserve(data->heaps[i].base,
+ data->heaps[i].size);
+ if (ret)
+ pr_err("memblock reserve of %x@%lx failed\n",
+ data->heaps[i].size,
+ data->heaps[i].base);
+ }
+}
diff --git a/drivers/staging/android/ion/ion.h b/drivers/staging/android/ion/ion.h
index 87f6a45..4e012b8 100644
--- a/drivers/staging/android/ion/ion.h
+++ b/drivers/staging/android/ion/ion.h
@@ -87,6 +87,17 @@ struct ion_platform_data {
};

/**
+ * ion_reserve() - reserve memory for ion heaps if applicable
+ * @data: platform data specifying starting physical address and
+ * size
+ *
+ * Calls memblock reserve to set aside memory for heaps that are
+ * located at specific memory addresses or of specfic sizes not
+ * managed by the kernel
+ */
+void ion_reserve(struct ion_platform_data *data);
+
+/**
* ion_client_create() - allocate a client and returns it
* @dev: the global ion device
* @heap_mask: mask of heaps this client can allocate from
--
1.8.3.2