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Commit 5a2c937a authored by Hiroshi Doyu's avatar Hiroshi Doyu Committed by Joerg Roedel
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iommu/tegra: smmu: Use debugfs_create_dir for directory 



The commit c3b1a350 "debugfs: make sure that debugfs_create_file() gets
used only for regulars" doesn't allow to use debugfs_create_file() for
dir. Keep debugfs data in smmu_device instead of directory's i_private.

Signed-off-by: default avatarHiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 39abf8aa

drivers/iommu/tegra-smmu.c

+35 −17
Original line number Diff line number Diff line
@@ -246,6 +246,12 @@ struct smmu_as { 
	spinlock_t		client_lock; /* for client list */

};



struct smmu_debugfs_info {

	struct smmu_device *smmu;

	int mc;

	int cache;

};



/*

 * Per SMMU device - IOMMU device

 */
@@ -267,6 +273,7 @@ struct smmu_device { 
	unsigned long asid_security;



	struct dentry *debugfs_root;

	struct smmu_debugfs_info *debugfs_info;



	struct device_node *ahb;
@@ -917,9 +924,10 @@ static ssize_t smmu_debugfs_stats_write(struct file *file, 
					const char __user *buffer,

					size_t count, loff_t *pos)

{

	struct smmu_debugfs_info *info;

	struct smmu_device *smmu;

	struct dentry *dent;

	int i, cache, mc;

	int i;

	enum {

		_OFF = 0,

		_ON,
@@ -947,11 +955,10 @@ static ssize_t smmu_debugfs_stats_write(struct file *file, 
		return -EINVAL;



	dent = file->f_dentry;

	cache = (int)dent->d_inode->i_private;

	mc = (int)dent->d_parent->d_inode->i_private;

	smmu = dent->d_parent->d_parent->d_inode->i_private;

	info = dent->d_inode->i_private;

	smmu = info->smmu;



	offs = SMMU_CACHE_CONFIG(cache);

	offs = SMMU_CACHE_CONFIG(info->cache);

	val = smmu_read(smmu, offs);

	switch (i) {

	case _OFF:
@@ -983,21 +990,21 @@ static ssize_t smmu_debugfs_stats_write(struct file *file, 


static int smmu_debugfs_stats_show(struct seq_file *s, void *v)

{

	struct smmu_debugfs_info *info;

	struct smmu_device *smmu;

	struct dentry *dent;

	int i, cache, mc;

	int i;

	const char * const stats[] = { "hit", "miss", };



	dent = d_find_alias(s->private);

	cache = (int)dent->d_inode->i_private;

	mc = (int)dent->d_parent->d_inode->i_private;

	smmu = dent->d_parent->d_parent->d_inode->i_private;

	info = dent->d_inode->i_private;

	smmu = info->smmu;



	for (i = 0; i < ARRAY_SIZE(stats); i++) {

		u32 val;

		size_t offs;



		offs = SMMU_STATS_CACHE_COUNT(mc, cache, i);

		offs = SMMU_STATS_CACHE_COUNT(info->mc, info->cache, i);

		val = smmu_read(smmu, offs);

		seq_printf(s, "%s:%08x ", stats[i], val);
@@ -1025,16 +1032,22 @@ static const struct file_operations smmu_debugfs_stats_fops = { 
static void smmu_debugfs_delete(struct smmu_device *smmu)

{

	debugfs_remove_recursive(smmu->debugfs_root);

	kfree(smmu->debugfs_info);

}



static void smmu_debugfs_create(struct smmu_device *smmu)

{

	int i;

	size_t bytes;

	struct dentry *root;



	root = debugfs_create_file(dev_name(smmu->dev),

				   S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,

				   NULL, smmu, NULL);

	bytes = ARRAY_SIZE(smmu_debugfs_mc) * ARRAY_SIZE(smmu_debugfs_cache) *

		sizeof(*smmu->debugfs_info);

	smmu->debugfs_info = kmalloc(bytes, GFP_KERNEL);

	if (!smmu->debugfs_info)

		return;



	root = debugfs_create_dir(dev_name(smmu->dev), NULL);

	if (!root)

		goto err_out;

	smmu->debugfs_root = root;
@@ -1043,18 +1056,23 @@ static void smmu_debugfs_create(struct smmu_device *smmu) 
		int j;

		struct dentry *mc;



		mc = debugfs_create_file(smmu_debugfs_mc[i],

					 S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,

					 root, (void *)i, NULL);

		mc = debugfs_create_dir(smmu_debugfs_mc[i], root);

		if (!mc)

			goto err_out;



		for (j = 0; j < ARRAY_SIZE(smmu_debugfs_cache); j++) {

			struct dentry *cache;

			struct smmu_debugfs_info *info;



			info = smmu->debugfs_info;

			info += i * ARRAY_SIZE(smmu_debugfs_mc) + j;

			info->smmu = smmu;

			info->mc = i;

			info->cache = j;



			cache = debugfs_create_file(smmu_debugfs_cache[j],

						    S_IWUGO | S_IRUGO, mc,

						    (void *)j,

						    (void *)info,

						    &smmu_debugfs_stats_fops);

			if (!cache)

				goto err_out;