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Subject[PATCH 7/8] scsi: hisi_sas: Add debugfs DQ file and add file operations
Date
From: Luo Jiaxing <luojiaxing@huawei.com>

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>
---
drivers/scsi/hisi_sas/hisi_sas_main.c | 52 +++++++++++++++++++++++++++++++++++
1 file changed, 52 insertions(+)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index ce0a9dc..45a0be2 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -2685,6 +2685,43 @@ static int hisi_sas_debugfs_cq_open(struct inode *inode, struct file *filp)
.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);
--
1.9.1
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