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

This patch create debugfs file for CQ 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 fbd9b4a..ce0a9dc 100644 (file)
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -2630,12 +2630,68 @@ static const struct file_operations hisi_sas_debugfs_port_fops = {
        .owner = THIS_MODULE,
 };
 
+static int hisi_sas_show_row_32(struct seq_file *s, int index,
+                               int sz, u32 *ptr)
+{
+       int i;
+
+       /* completion header size not fixed per HW version */
+       seq_printf(s, "index %04d:\n\t", index);
+       for (i = 1; i <= sz / 4; i++, ptr++) {
+               if (!(i % 4))
+                       seq_puts(s, "\n\t");
+       }
+       seq_puts(s, "\n");
+
+       return 0;
+}
+
+static int hisi_sas_cq_show_slot(struct seq_file *s, int slot, void *cq_ptr)
+{
+       struct hisi_sas_cq *cq = cq_ptr;
+       struct hisi_hba *hisi_hba = cq->hisi_hba;
+       void *complete_queue = hisi_hba->debugfs_complete_hdr[cq->id];
+       void *complete_hdr = complete_queue +
+                       (hisi_hba->hw->complete_hdr_size * slot);
+
+       return hisi_sas_show_row_32(s, slot,
+                               hisi_hba->hw->complete_hdr_size,
+                               complete_hdr);
+}
+
+static int hisi_sas_debugfs_cq_show(struct seq_file *s, void *p)
+{
+       struct hisi_sas_cq *cq = s->private;
+       int slot, ret;
+
+       for (slot = 0; slot < HISI_SAS_QUEUE_SLOTS; slot++) {
+               ret = hisi_sas_cq_show_slot(s, slot, cq);
+               if (ret)
+                       return ret;
+       }
+       return 0;
+}
+
+static int hisi_sas_debugfs_cq_open(struct inode *inode, struct file *filp)
+{
+       return single_open(filp, hisi_sas_debugfs_cq_show, inode->i_private);
+}
+
+static const struct file_operations hisi_sas_debugfs_cq_fops = {
+       .open = hisi_sas_debugfs_cq_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;
        struct dentry *dentry;
        char name[256];
        int p;
+       int c;
 
        /* Create dump dir inside device dir */
        dump_dentry = debugfs_create_dir("dump", hisi_hba->debugfs_dir);
@@ -2661,6 +2717,20 @@ static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
                        goto fail;
        }
 
+       /* Create CQ dir and files */
+       dentry = debugfs_create_dir("cq", dump_dentry);
+       if (!dentry)
+               goto fail;
+
+       for (c = 0; c < hisi_hba->queue_count; c++) {
+               snprintf(name, 256, "%d", c);
+
+               if (!debugfs_create_file(name, 0400, dentry,
+                                        &hisi_hba->cq[c],
+                                        &hisi_sas_debugfs_cq_fops))
+                       goto fail;
+       }
+
        return;
 fail:
        debugfs_remove_recursive(hisi_hba->debugfs_dir);