gpu: ion: Add platform driver for msm ion

Add platform driver for msm specific ion devices

Signed-off-by: Laura Abbott <[email protected]>

drivers/gpu/ion/Kconfig

@@ -10,3 +10,8 @@ config ION_TEGRA
 	help
 	  Choose this option if you wish to use ion on an nVidia Tegra.
 
+config ION_MSM
+	tristate "Ion for MSM"
+	depends on ARCH_MSM && ION
+	help
+	  Choose this option if you wish to use ion on an MSM target.

drivers/gpu/ion/Makefile

@@ -1,2 +1,3 @@
 obj-$(CONFIG_ION) +=	ion.o ion_heap.o ion_system_heap.o ion_carveout_heap.o
 obj-$(CONFIG_ION_TEGRA) += tegra/
+obj-$(CONFIG_ION_MSM) += msm/

drivers/gpu/ion/msm/Makefile

@@ -0,0 +1 @@
+obj-y += msm_ion.o

drivers/gpu/ion/msm/msm_ion.c

@@ -0,0 +1,106 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only 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 <linux/err.h>
+#include <linux/ion.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include "../ion_priv.h"
+
+struct ion_device *idev;
+int num_heaps;
+struct ion_heap **heaps;
+
+struct ion_client *msm_ion_client_create(unsigned int heap_mask,
+					const char *name)
+{
+	return ion_client_create(idev, heap_mask, name);
+}
+
+static int msm_ion_probe(struct platform_device *pdev)
+{
+	struct ion_platform_data *pdata = pdev->dev.platform_data;
+	int err;
+	int i;
+
+	num_heaps = pdata->nr;
+
+	heaps = kcalloc(pdata->nr, sizeof(struct ion_heap *), GFP_KERNEL);
+
+	if (!heaps) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	idev = ion_device_create(NULL);
+	if (IS_ERR_OR_NULL(idev)) {
+		err = PTR_ERR(idev);
+		goto freeheaps;
+	}
+
+	/* create the heaps as specified in the board file */
+	for (i = 0; i < num_heaps; i++) {
+		struct ion_platform_heap *heap_data = &pdata->heaps[i];
+
+		heaps[i] = ion_heap_create(heap_data);
+		if (IS_ERR_OR_NULL(heaps[i])) {
+			err = PTR_ERR(heaps[i]);
+			goto heapdestroy;
+		}
+		ion_device_add_heap(idev, heaps[i]);
+	}
+	platform_set_drvdata(pdev, idev);
+	return 0;
+
+heapdestroy:
+	for (i = 0; i < num_heaps; i++) {
+		if (!IS_ERR_OR_NULL(heaps[i]))
+			ion_heap_destroy(heaps[i]);
+	}
+freeheaps:
+	kfree(heaps);
+out:
+	return err;
+}
+
+static int msm_ion_remove(struct platform_device *pdev)
+{
+	struct ion_device *idev = platform_get_drvdata(pdev);
+	int i;
+
+	for (i = 0; i < num_heaps; i++)
+		ion_heap_destroy(heaps[i]);
+
+	ion_device_destroy(idev);
+	kfree(heaps);
+	return 0;
+}
+
+static struct platform_driver msm_ion_driver = {
+	.probe = msm_ion_probe,
+	.remove = msm_ion_remove,
+	.driver = { .name = "ion-msm" }
+};
+
+static int __init msm_ion_init(void)
+{
+	return platform_driver_register(&msm_ion_driver);
+}
+
+static void __exit msm_ion_exit(void)
+{
+	platform_driver_unregister(&msm_ion_driver);
+}
+
+module_init(msm_ion_init);
+module_exit(msm_ion_exit);
+

include/linux/ion.h

@@ -95,6 +95,17 @@ struct ion_platform_data {
 struct ion_client *ion_client_create(struct ion_device *dev,
 				     unsigned int heap_mask, const char *name);
 
+/**
+ *  msm_ion_client_create - allocate a client using the ion_device specified in
+ *				drivers/gpu/ion/msm/msm_ion.c
+ *
+ * heap_mask and name are the same as ion_client_create, return values
+ * are the same as ion_client_create.
+ */
+
+struct ion_client *msm_ion_client_create(unsigned int heap_mask,
+					const char *name);
+
 /**
  * ion_client_destroy() -  free's a client and all it's handles
  * @client:	the client