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Commit d964195c authored by Sujeev Dias's avatar Sujeev Dias Committed by Gerrit - the friendly Code Review server
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mhi: dev: netdev: add debug stats to monitor buffers allocated 



For debugging purpose, keep track of number of buffers that
are queued using recycle pool, atomic pool, and background pool.

CRs-Fixed: 2468499
Change-Id: I26e7bf0ac0fd21e74f6255fc266c701042961a03
Signed-off-by: default avatarSujeev Dias <sdias@codeaurora.org>
parent 69d68012

drivers/bus/mhi/devices/mhi_netdev.c

+34 −0
Original line number Diff line number Diff line
@@ -108,6 +108,9 @@ struct mhi_netdev { 
	enum MHI_DEBUG_LEVEL msg_lvl;

	enum MHI_DEBUG_LEVEL ipc_log_lvl;

	void *ipc_log;



	/* debug stats */

	u32 abuffers, kbuffers, rbuffers;

};



struct mhi_netdev_priv {
@@ -219,6 +222,7 @@ static int mhi_netdev_tmp_alloc(struct mhi_netdev *mhi_netdev, 
			__free_pages(mhi_buf->page, order);

			return ret;

		}

		mhi_netdev->abuffers++;

	}



	return 0;
@@ -259,6 +263,7 @@ static int mhi_netdev_queue_bg_pool(struct mhi_netdev *mhi_netdev, 
			break;

		}

		list_del(&mhi_buf->node);

		mhi_netdev->kbuffers++;

	}



	/* add remaining buffers back to main pool */
@@ -330,6 +335,7 @@ static void mhi_netdev_queue(struct mhi_netdev *mhi_netdev, 
			list_add(&mhi_buf->node, pool);

			return;

		}

		mhi_netdev->rbuffers++;

	}



	/* recycling did not work, buffers are still busy use bg pool */
@@ -835,6 +841,31 @@ static void mhi_netdev_status_cb(struct mhi_device *mhi_dev, enum MHI_CB mhi_cb) 


struct dentry *dentry;



static int mhi_netdev_debugfs_stats_show(struct seq_file *m, void *d)

{

	struct mhi_netdev *mhi_netdev = m->private;



	seq_printf(m,

		   "mru:%u order:%u pool_size:%d, bg_pool_size:%d bg_pool_limit:%d abuf:%u kbuf:%u rbuf:%u\n",

		   mhi_netdev->mru, mhi_netdev->order, mhi_netdev->pool_size,

		   mhi_netdev->bg_pool_size, mhi_netdev->bg_pool_limit,

		   mhi_netdev->abuffers, mhi_netdev->kbuffers,

		   mhi_netdev->rbuffers);



	return 0;

}



static int mhi_netdev_debugfs_stats_open(struct inode *inode, struct file *fp)

{

	return single_open(fp, mhi_netdev_debugfs_stats_show, inode->i_private);

}



static const struct file_operations debugfs_stats = {

	.open = mhi_netdev_debugfs_stats_open,

	.release = single_release,

	.read = seq_read,

};



static void mhi_netdev_create_debugfs(struct mhi_netdev *mhi_netdev)

{

	char node_name[32];
@@ -851,6 +882,9 @@ static void mhi_netdev_create_debugfs(struct mhi_netdev *mhi_netdev) 
	mhi_netdev->dentry = debugfs_create_dir(node_name, dentry);

	if (IS_ERR_OR_NULL(mhi_netdev->dentry))

		return;



	debugfs_create_file_unsafe("stats", 0444, mhi_netdev->dentry,

				   mhi_netdev, &debugfs_stats);

}



static void mhi_netdev_create_debugfs_dir(void)