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ion: msm: enable debugfs for ion heaps

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

Change-Id: I8499967c8f202b079b6ccbe1c31cb38ee6a51374
Signed-off-by: Sudarshan Rajagopalan <sudaraja@codeaurora.org>
[isaacm@codeaurora.org: Rework to move logic out of ION core]
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
This commit is contained in:
Sudarshan Rajagopalan 2019-08-26 17:52:12 -07:00 • committed by Isaac J. Manjarres
commit 016daf243e
2 changed files with 47 additions and 0 deletions
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43
drivers/staging/android/ion/heaps/msm_ion.c
View file

@ -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);

4
drivers/staging/android/ion/heaps/msm_ion_priv.h
View file

@ -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;
};