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Commit 016daf24 authored by Sudarshan Rajagopalan's avatar Sudarshan Rajagopalan Committed by Isaac J. Manjarres
Browse files

ion: msm: enable debugfs for ion heaps 



Add debugfs node for ion which prints out the debug_show
of all the heaps within ion.

Change-Id: I8499967c8f202b079b6ccbe1c31cb38ee6a51374
Signed-off-by: default avatarSudarshan Rajagopalan <sudaraja@codeaurora.org>
[isaacm@codeaurora.org: Rework to move logic out of ION core]
Signed-off-by: default avatarIsaac J. Manjarres <isaacm@codeaurora.org>
parent 2b78a1e4

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

+43 −0
Original line number Diff line number Diff line
@@ -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

+4 −0
Original line number Diff line number Diff line
@@ -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;

};