scsi: hisi_sas: Add debugfs ITCT file and add file operations

This patch creates debugfs file for ITCT and adds file operations.

Signed-off-by: Luo Jiaxing <luojiaxing@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 54e4e77..a8fda1c 100644 (file)
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -2769,6 +2769,36 @@ static const struct file_operations hisi_sas_debugfs_iost_fops = {
        .owner = THIS_MODULE,
 };
 
+static int hisi_sas_debugfs_itct_show(struct seq_file *s, void *p)
+{
+       int i, ret;
+       struct hisi_hba *hisi_hba = s->private;
+       struct hisi_sas_itct *debugfs_itct = hisi_hba->debugfs_itct;
+       __le64 *itct = &debugfs_itct->qw0;
+
+       for (i = 0; i < HISI_SAS_MAX_ITCT_ENTRIES; i++, debugfs_itct++) {
+               ret = hisi_sas_show_row_64(s, i, sizeof(*debugfs_itct),
+                                          itct);
+               if (ret)
+                       return ret;
+       }
+
+       return 0;
+}
+
+static int hisi_sas_debugfs_itct_open(struct inode *inode, struct file *filp)
+{
+       return single_open(filp, hisi_sas_debugfs_itct_show, inode->i_private);
+}
+
+static const struct file_operations hisi_sas_debugfs_itct_fops = {
+       .open = hisi_sas_debugfs_itct_open,
+       .read = seq_read,
+       .llseek = seq_lseek,
+       .release = single_release,
+       .owner = THIS_MODULE,
+};
+
 static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
 {
        struct dentry *dump_dentry;
@@ -2815,6 +2845,9 @@ static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
        debugfs_create_file("iost", 0400, dump_dentry, hisi_hba,
                            &hisi_sas_debugfs_iost_fops);
 
+       debugfs_create_file("itct", 0400, dump_dentry, hisi_hba,
+                           &hisi_sas_debugfs_itct_fops);
+
        return;
 }