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

This patch create debugfs file for DQ and add 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 ce0a9dcc355bb6e06d7fc012ea6165299334d373..45a0be2411a5fee9e44c87095a2028559606a20f 100644 (file)
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -2685,6 +2685,43 @@ static const struct file_operations hisi_sas_debugfs_cq_fops = {
        .owner = THIS_MODULE,
 };
 
+static int hisi_sas_dq_show_slot(struct seq_file *s, int slot, void *dq_ptr)
+{
+       struct hisi_sas_dq *dq = dq_ptr;
+       struct hisi_hba *hisi_hba = dq->hisi_hba;
+       void *cmd_queue = hisi_hba->debugfs_cmd_hdr[dq->id];
+       void *cmd_hdr = cmd_queue +
+               hisi_hba->hw->complete_hdr_size * slot;
+
+       return hisi_sas_show_row_32(s, slot, sizeof(struct hisi_sas_cmd_hdr),
+                                   cmd_hdr);
+}
+
+static int hisi_sas_debugfs_dq_show(struct seq_file *s, void *p)
+{
+       int slot, ret;
+
+       for (slot = 0; slot < HISI_SAS_QUEUE_SLOTS; slot++) {
+               ret = hisi_sas_dq_show_slot(s, slot, s->private);
+               if (ret)
+                       return ret;
+       }
+       return 0;
+}
+
+static int hisi_sas_debugfs_dq_open(struct inode *inode, struct file *filp)
+{
+       return single_open(filp, hisi_sas_debugfs_dq_show, inode->i_private);
+}
+
+static const struct file_operations hisi_sas_debugfs_dq_fops = {
+       .open = hisi_sas_debugfs_dq_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;
@@ -2692,6 +2729,7 @@ static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
        char name[256];
        int p;
        int c;
+       int d;
 
        /* Create dump dir inside device dir */
        dump_dentry = debugfs_create_dir("dump", hisi_hba->debugfs_dir);
@@ -2731,6 +2769,20 @@ static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
                        goto fail;
        }
 
+       /* Create DQ dir and files */
+       dentry = debugfs_create_dir("dq", dump_dentry);
+       if (!dentry)
+               goto fail;
+
+       for (d = 0; d < hisi_hba->queue_count; d++) {
+               snprintf(name, 256, "%d", d);
+
+               if (!debugfs_create_file(name, 0400, dentry,
+                                        &hisi_hba->dq[d],
+                                        &hisi_sas_debugfs_dq_fops))
+                       goto fail;
+       }
+
        return;
 fail:
        debugfs_remove_recursive(hisi_hba->debugfs_dir);