Merge "ion: msm: enable debugfs for ion heaps"

drivers/staging/android/ion/heaps/ion_secure_util.c

@@ -90,6 +90,7 @@ int ion_populate_vm_list(unsigned long flags, unsigned int *vm_list,
 	}
 	return 0;
 }
+EXPORT_SYMBOL(ion_populate_vm_list);
 
 int ion_hyp_unassign_sg(struct sg_table *sgt, int *source_vm_list,
 			int source_nelems, bool clear_page_private)

drivers/staging/android/ion/heaps/msm_ion.c

@@ -4,6 +4,8 @@
  */
 
 #include <linux/err.h>
+#include <linux/debugfs.h>
+#include <linux/file.h>
 #include <linux/io.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
@@ -95,6 +97,46 @@ static struct heap_types_info {
 	MAKE_HEAP_TYPE_MAPPING(HYP_CMA),
 };
 
+static int msm_ion_debug_heap_show(struct seq_file *s, void *unused)
+{
+	struct msm_ion_heap *msm_heap = s->private;
+
+	if (msm_heap && msm_heap->debug_show)
+		msm_heap->debug_show(&msm_heap->ion_heap, s, unused);
+
+	return 0;
+}
+
+static int msm_ion_debug_heap_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, msm_ion_debug_heap_show, inode->i_private);
+}
+
+static const struct file_operations msm_ion_debug_heap_fops = {
+	.open = msm_ion_debug_heap_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static void msm_ion_debugfs_create_file(struct msm_ion_heap *msm_heap)
+{
+	char debug_name[64], buf[256];
+	struct dentry *debugfs_root;
+	struct ion_heap *heap;
+
+	if (msm_heap && msm_heap->debug_show &&
+	    msm_heap->ion_heap.debugfs_dir) {
+		heap = &msm_heap->ion_heap;
+		debugfs_root = heap->debugfs_dir;
+		scnprintf(debug_name, 64, "%s_stats", heap->name);
+		if (!debugfs_create_file(debug_name, 0664, debugfs_root,
+					 msm_heap, &msm_ion_debug_heap_fops))
+			pr_err("Failed to create heap debugfs at %s/%s\n",
+			       dentry_path(debugfs_root, buf, 256), debug_name);
+	}
+}
+
 static struct ion_heap *ion_heap_create(struct ion_platform_heap *heap_data)
 {
 	struct ion_heap *heap = NULL;
@@ -451,6 +493,7 @@ static int msm_ion_probe(struct platform_device *pdev)
 		}
 
 		ion_device_add_heap(heaps[i]);
+		msm_ion_debugfs_create_file(to_msm_ion_heap(heaps[i]));
 	}
 	free_pdata(pdata);
 

drivers/staging/android/ion/heaps/msm_ion_priv.h

@@ -81,11 +81,15 @@ struct ion_platform_heap {
  * struct msm_ion_heap - defines an ion heap, as well as additional information
  * relevant to the heap.
  * @dev:	the device structure associated with the heap
+ * @debug_show: called when the heap debug file is read to add any heap specific
+ *		debug info to output
  * @ion_heap:	ion heap
  *
  */
 struct msm_ion_heap {
 	struct device *dev;
+	int (*debug_show)(struct ion_heap *heap, struct seq_file *s,
+			  void *unused);
 	struct ion_heap ion_heap;
 };
 

include/linux/msm_ion.h

@@ -6,6 +6,7 @@
 #ifndef _MSM_ION_H
 #define _MSM_ION_H
 
+#include <linux/bitmap.h>
 #include <linux/device.h>
 #include <uapi/linux/msm_ion.h>
 
@@ -13,6 +14,16 @@
 
 struct device *msm_ion_heap_device_by_id(int heap_id);
 
+static inline unsigned int ion_get_flags_num_vm_elems(unsigned int flags)
+{
+	unsigned long vm_flags = flags & ION_FLAGS_CP_MASK;
+
+	return ((unsigned int)bitmap_weight(&vm_flags, BITS_PER_LONG));
+}
+
+int ion_populate_vm_list(unsigned long flags, unsigned int *vm_list,
+			 int nelems);
+
 #else
 
 static inline struct device *msm_ion_heap_device_by_id(int heap_id)
@@ -20,5 +31,16 @@ static inline struct device *msm_ion_heap_device_by_id(int heap_id)
 	return ERR_PTR(-ENODEV);
 }
 
+static inline unsigned int ion_get_flags_num_vm_elems(unsigned int flags)
+{
+	return 0;
+}
+
+static inline int ion_populate_vm_list(unsigned long flags,
+				       unsigned int *vm_list, int nelems)
+{
+	return -EINVAL;
+}
+
 #endif /* CONFIG_ION_MSM_HEAPS */
 #endif /* _MSM_ION_H */