@@ -33,3 +33,13 @@ config ION_TEGRA
help
Choose this option if you wish to use ion on an nVidia Tegra.
+config ION_OF
+ bool "Devicetree support for Ion"
+ depends on ION && OF
+ help
+ Provides base support for defining Ion heaps in devicetree
+ and setting them up. Also includes functions for platforms
+ to parse the devicetree and expand for their own custom
+ extensions
+
+ If using Ion and devicetree, you should say Y here
@@ -5,6 +5,7 @@ ifdef CONFIG_COMPAT
obj-$(CONFIG_ION) += compat_ion.o
endif
-obj-$(CONFIG_ION_DUMMY) += ion_dummy_driver.o
-obj-$(CONFIG_ION_TEGRA) += tegra/
-
+obj-$(CONFIG_ION_DUMMY) += ion_dummy_driver.o
+obj-$(CONFIG_ION_PHYSMEM) += ion_physmem.o
+obj-$(CONFIG_ION_TEGRA) += tegra/
+obj-$(CONFIG_ION_OF) += ion_of.o ion_physmem.o
new file mode 100644
@@ -0,0 +1,185 @@
+/*
+ * Based on work from:
+ * Andrew Andrianov <andrew@ncrmnt.org>
+ * Google
+ * The Linux Foundation
+ *
+ * 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.
+ */
+
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/cma.h>
+#include <linux/dma-contiguous.h>
+#include <linux/io.h>
+#include <linux/of_reserved_mem.h>
+#include "ion.h"
+#include "ion_priv.h"
+
+/*
+ * Future work: allow callback function for each heap?
+ */
+
+int ion_parse_dt_heap_common(struct device_node *heap_node,
+ struct ion_platform_heap *heap)
+{
+ u32 ion_heap_id, ion_heap_align, ion_heap_type;
+ const char *ion_heap_name;
+ int ret;
+
+ ret = of_property_read_string(heap_node, "linux,ion-heap-name",
+ &ion_heap_name);
+ if (ret)
+ return ret;
+
+ ret = of_property_read_u32(heap_node, "linux,ion-heap-id",
+ &ion_heap_id);
+ if (ret)
+ return ret;
+
+ ret = of_property_read_u32(heap_node, "linux,ion-heap-type",
+ &ion_heap_type);
+ if (ret)
+ return ret;
+
+ ret = of_property_read_u32(heap_node, "linux,ion-heap-align",
+ &ion_heap_align);
+ if (ret)
+ /* align is optional so make the alignemnt page size */
+ ion_heap_align = PAGE_SIZE;
+
+ heap->id = ion_heap_id;
+ heap->type = ion_heap_type;
+ heap->name = ion_heap_name;
+ heap->align = ion_heap_align;
+ pr_info("%s: id %d type %d name %s align %x\n",
+ __func__,
+ ion_heap_id, ion_heap_type,
+ ion_heap_name, ion_heap_align);
+ return 0;
+}
+
+int ion_setup_heap_common(struct platform_device *parent,
+ struct device_node *heap_node,
+ struct ion_platform_heap *heap)
+{
+ int ret = 0;
+
+ switch (heap->type) {
+ case ION_HEAP_TYPE_CARVEOUT:
+ case ION_HEAP_TYPE_CHUNK:
+ if (heap->base && heap->size)
+ return 0;
+
+ ret = of_reserved_mem_device_init(heap->priv);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+struct ion_platform_data *ion_parse_dt(struct platform_device *pdev)
+{
+ int num_heaps, ret;
+ const struct device_node *dt_node = pdev->dev.of_node;
+ struct device_node *node;
+ struct ion_platform_heap *heaps;
+ struct ion_platform_data *data;
+ int i = 0;
+
+ num_heaps = of_get_available_child_count(dt_node);
+
+ if (!num_heaps)
+ return ERR_PTR(-EINVAL);
+
+ heaps = devm_kzalloc(&pdev->dev,
+ sizeof(struct ion_platform_heap)*num_heaps,
+ GFP_KERNEL);
+ if (!heaps)
+ return ERR_PTR(-ENOMEM);
+
+ data = devm_kzalloc(&pdev->dev, sizeof(struct ion_platform_data),
+ GFP_KERNEL);
+ if (!data)
+ return ERR_PTR(-ENOMEM);
+
+ for_each_available_child_of_node(dt_node, node) {
+ struct platform_device *heap_pdev;
+
+ ret = ion_parse_dt_heap_common(node, &heaps[i]);
+ if (ret)
+ return ERR_PTR(ret);
+
+ heap_pdev = of_platform_device_create(node, heaps[i].name,
+ &pdev->dev);
+ if (!pdev)
+ return ERR_PTR(-ENOMEM);
+ heap_pdev->dev.platform_data = &heaps[i];
+
+ heaps[i].priv = &heap_pdev->dev;
+
+ ret = ion_setup_heap_common(pdev, node, &heaps[i]);
+ if (ret)
+ return ERR_PTR(ret);
+ i++;
+
+ /* TODO custom callback */
+ }
+
+
+ data->heaps = heaps;
+ data->nr = num_heaps;
+ return data;
+}
+
+#ifdef CONFIG_OF_RESERVED_MEM
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+#include <linux/of_reserved_mem.h>
+
+static int rmem_ion_device_init(struct reserved_mem *rmem, struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct ion_platform_heap *heap = pdev->dev.platform_data;
+
+ heap->base = rmem->base;
+ heap->base = rmem->size;
+ pr_debug("%s: heap %s base %pa size %pa dev %p\n", __func__,
+ heap->name, &rmem->base, &rmem->size, dev);
+ return 0;
+}
+
+static void rmem_ion_device_release(struct reserved_mem *rmem,
+ struct device *dev)
+{
+ return;
+}
+
+static const struct reserved_mem_ops rmem_dma_ops = {
+ .device_init = rmem_ion_device_init,
+ .device_release = rmem_ion_device_release,
+};
+
+static int __init rmem_ion_setup(struct reserved_mem *rmem)
+{
+ phys_addr_t size = rmem->size;
+
+ size = size / 1024;
+
+ pr_info("Ion memory setup at %pa size %pa MiB\n",
+ &rmem->base, &size);
+ rmem->ops = &rmem_dma_ops;
+ return 0;
+}
+RESERVEDMEM_OF_DECLARE(ion, "ion-region", rmem_ion_setup);
+#endif
new file mode 100644
@@ -0,0 +1,3 @@
+/* YES I NEED HEADER */
+
+struct ion_platform_data *ion_parse_dt(struct platform_device *pdev);