qla2xxx: Add DebugFS node to display Port Database

Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index ae38b7a..0894802 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -3300,6 +3300,8 @@ struct qlt_hw_data {
        uint8_t tgt_node_name[WWN_SIZE];
 
        struct dentry *dfs_tgt_sess;
+       struct dentry *dfs_tgt_port_database;
+
        struct list_head q_full_list;
        uint32_t num_pend_cmds;
        uint32_t num_qfull_cmds_alloc;

diff --git a/drivers/scsi/qla2xxx/qla_dfs.c b/drivers/scsi/qla2xxx/qla_dfs.c
index 3b35905..989e17b 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_dfs.c
+++ b/drivers/scsi/qla2xxx/qla_dfs.c
@@ -19,11 +19,11 @@ qla2x00_dfs_tgt_sess_show(struct seq_file *s, void *unused)
        struct qla_hw_data *ha = vha->hw;
        unsigned long flags;
        struct fc_port *sess = NULL;
-       struct qla_tgt *tgt= vha->vha_tgt.qla_tgt;
+       struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 
-       seq_printf(s, "%s\n",vha->host_str);
+       seq_printf(s, "%s\n", vha->host_str);
        if (tgt) {
-               seq_printf(s, "Port ID   Port Name                Handle\n");
+               seq_puts(s, "Port ID   Port Name                Handle\n");
 
                spin_lock_irqsave(&ha->tgt.sess_lock, flags);
                list_for_each_entry(sess, &vha->vp_fcports, list)
@@ -44,7 +44,6 @@ qla2x00_dfs_tgt_sess_open(struct inode *inode, struct file *file)
        return single_open(file, qla2x00_dfs_tgt_sess_show, vha);
 }
 
-
 static const struct file_operations dfs_tgt_sess_ops = {
        .open           = qla2x00_dfs_tgt_sess_open,
        .read           = seq_read,
@@ -52,6 +51,78 @@ static const struct file_operations dfs_tgt_sess_ops = {
        .release        = single_release,
 };
 
+static int
+qla2x00_dfs_tgt_port_database_show(struct seq_file *s, void *unused)
+{
+       scsi_qla_host_t *vha = s->private;
+       struct qla_hw_data *ha = vha->hw;
+       struct gid_list_info *gid_list;
+       dma_addr_t gid_list_dma;
+       fc_port_t fc_port;
+       char *id_iter;
+       int rc, i;
+       uint16_t entries, loop_id;
+       struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
+
+       seq_printf(s, "%s\n", vha->host_str);
+       if (tgt) {
+               gid_list = dma_alloc_coherent(&ha->pdev->dev,
+                   qla2x00_gid_list_size(ha),
+                   &gid_list_dma, GFP_KERNEL);
+               if (!gid_list) {
+                       ql_dbg(ql_dbg_user, vha, 0x705c,
+                           "DMA allocation failed for %u\n",
+                            qla2x00_gid_list_size(ha));
+                       return 0;
+               }
+
+               rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma,
+                   &entries);
+               if (rc != QLA_SUCCESS)
+                       goto out_free_id_list;
+
+               id_iter = (char *)gid_list;
+
+               seq_puts(s, "Port Name  Port ID         Loop ID\n");
+
+               for (i = 0; i < entries; i++) {
+                       struct gid_list_info *gid =
+                           (struct gid_list_info *)id_iter;
+                       loop_id = le16_to_cpu(gid->loop_id);
+                       memset(&fc_port, 0, sizeof(fc_port_t));
+
+                       fc_port.loop_id = loop_id;
+
+                       rc = qla24xx_gpdb_wait(vha, &fc_port, 0);
+                       seq_printf(s, "%8phC  %02x%02x%02x  %d\n",
+                               fc_port.port_name, fc_port.d_id.b.domain,
+                               fc_port.d_id.b.area, fc_port.d_id.b.al_pa,
+                               fc_port.loop_id);
+                       id_iter += ha->gid_list_info_size;
+               }
+out_free_id_list:
+               dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
+                   gid_list, gid_list_dma);
+       }
+
+       return 0;
+}
+
+static int
+qla2x00_dfs_tgt_port_database_open(struct inode *inode, struct file *file)
+{
+       scsi_qla_host_t *vha = inode->i_private;
+
+       return single_open(file, qla2x00_dfs_tgt_port_database_show, vha);
+}
+
+static const struct file_operations dfs_tgt_port_database_ops = {
+       .open           = qla2x00_dfs_tgt_port_database_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+};
+
 static int
 qla_dfs_fw_resource_cnt_show(struct seq_file *s, void *unused)
 {
@@ -296,6 +367,14 @@ create_nodes:
                goto out;
        }
 
+       ha->tgt.dfs_tgt_port_database = debugfs_create_file("tgt_port_database",
+           S_IRUSR,  ha->dfs_dir, vha, &dfs_tgt_port_database_ops);
+       if (!ha->tgt.dfs_tgt_port_database) {
+               ql_log(ql_log_warn, vha, 0xffff,
+                   "Unable to create debugFS tgt_port_database node.\n");
+               goto out;
+       }
+
        ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
            &dfs_fce_ops);
        if (!ha->dfs_fce) {
@@ -326,6 +405,11 @@ qla2x00_dfs_remove(scsi_qla_host_t *vha)
                ha->tgt.dfs_tgt_sess = NULL;
        }
 
+       if (ha->tgt.dfs_tgt_port_database) {
+               debugfs_remove(ha->tgt.dfs_tgt_port_database);
+               ha->tgt.dfs_tgt_port_database = NULL;
+       }
+
        if (ha->dfs_fw_resource_cnt) {
                debugfs_remove(ha->dfs_fw_resource_cnt);
                ha->dfs_fw_resource_cnt = NULL;