text: /*
   * QLogic Fibre Channel HBA Driver
   * Copyright (c)  2003-2014 QLogic Corporation
   *
   * See LICENSE.qla2xxx for copyright and licensing details.
   */
  #include "qla_def.h"
  
  #include <linux/debugfs.h>
  #include <linux/seq_file.h>
  
  static struct dentry *qla2x00_dfs_root;
  static atomic_t qla2x00_dfs_root_count;
  
  static int
  qla_dfs_fw_resource_cnt_show(struct seq_file *s, void *unused)
  {
  	struct scsi_qla_host *vha = s->private;
  	struct qla_hw_data *ha = vha->hw;
  
  	seq_puts(s, "FW Resource count\n\n");
  	seq_printf(s, "Original TGT exchg count[%d]\n",
  	    ha->orig_fw_tgt_xcb_count);
  	seq_printf(s, "current TGT exchg count[%d]\n",
  	    ha->cur_fw_tgt_xcb_count);
  	seq_printf(s, "original Initiator Exchange count[%d]\n",
  	    ha->orig_fw_xcb_count);
  	seq_printf(s, "Current Initiator Exchange count[%d]\n",
  	    ha->cur_fw_xcb_count);
  	seq_printf(s, "Original IOCB count[%d]\n", ha->orig_fw_iocb_count);
  	seq_printf(s, "Current IOCB count[%d]\n", ha->cur_fw_iocb_count);
  	seq_printf(s, "MAX VP count[%d]\n", ha->max_npiv_vports);
  	seq_printf(s, "MAX FCF count[%d]\n", ha->fw_max_fcf_count);
  
  	return 0;
  }
  
  static int
  qla_dfs_fw_resource_cnt_open(struct inode *inode, struct file *file)
  {
  	struct scsi_qla_host *vha = inode->i_private;
  	return single_open(file, qla_dfs_fw_resource_cnt_show, vha);
  }
  
  static const struct file_operations dfs_fw_resource_cnt_ops = {
  	.open           = qla_dfs_fw_resource_cnt_open,
  	.read           = seq_read,
  	.llseek         = seq_lseek,
  	.release        = single_release,
  };
  
  static int
  qla_dfs_tgt_counters_show(struct seq_file *s, void *unused)
  {
  	struct scsi_qla_host *vha = s->private;
  
  	seq_puts(s, "Target Counters\n");
  	seq_printf(s, "qla_core_sbt_cmd = %lld\n",
  		vha->tgt_counters.qla_core_sbt_cmd);
  	seq_printf(s, "qla_core_ret_sta_ctio = %lld\n",
  		vha->tgt_counters.qla_core_ret_sta_ctio);
  	seq_printf(s, "qla_core_ret_ctio = %lld\n",
  		vha->tgt_counters.qla_core_ret_ctio);
  	seq_printf(s, "core_qla_que_buf = %lld\n",
  		vha->tgt_counters.core_qla_que_buf);
  	seq_printf(s, "core_qla_snd_status = %lld\n",
  		vha->tgt_counters.core_qla_snd_status);
  	seq_printf(s, "core_qla_free_cmd = %lld\n",
  		vha->tgt_counters.core_qla_free_cmd);
  	seq_printf(s, "num alloc iocb failed = %lld\n",
  		vha->tgt_counters.num_alloc_iocb_failed);
  	seq_printf(s, "num term exchange sent = %lld\n",
  		vha->tgt_counters.num_term_xchg_sent);
  	seq_printf(s, "num Q full sent = %lld\n",
  		vha->tgt_counters.num_q_full_sent);
  
  	return 0;
  }
  
  static int
  qla_dfs_tgt_counters_open(struct inode *inode, struct file *file)
  {
  	struct scsi_qla_host *vha = inode->i_private;
  	return single_open(file, qla_dfs_tgt_counters_show, vha);
  }
  
  static const struct file_operations dfs_tgt_counters_ops = {
  	.open           = qla_dfs_tgt_counters_open,
  	.read           = seq_read,
  	.llseek         = seq_lseek,
  	.release        = single_release,
  };
  
  static int
  qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
  {
  	scsi_qla_host_t *vha = s->private;
  	uint32_t cnt;
  	uint32_t *fce;
  	uint64_t fce_start;
  	struct qla_hw_data *ha = vha->hw;
  
  	mutex_lock(&ha->fce_mutex);
  
  	seq_puts(s, "FCE Trace Buffer\n");
  	seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
  	seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
  	seq_puts(s, "FCE Enable Registers\n");
  	seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
  	    ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
  	    ha->fce_mb[5], ha->fce_mb[6]);
  
  	fce = (uint32_t *) ha->fce;
  	fce_start = (unsigned long long) ha->fce_dma;
  	for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
  		if (cnt % 8 == 0)
  			seq_printf(s, "\n%llx: ",
  			    (unsigned long long)((cnt * 4) + fce_start));
  		else
  			seq_putc(s, ' ');
  		seq_printf(s, "%08x", *fce++);
  	}
  
  	seq_puts(s, "\nEnd\n");
  
  	mutex_unlock(&ha->fce_mutex);
  
  	return 0;
  }
  
  static int
  qla2x00_dfs_fce_open(struct inode *inode, struct file *file)
  {
  	scsi_qla_host_t *vha = inode->i_private;
  	struct qla_hw_data *ha = vha->hw;
  	int rval;
  
  	if (!ha->flags.fce_enabled)
  		goto out;
  
  	mutex_lock(&ha->fce_mutex);
  
  	/* Pause tracing to flush FCE buffers. */
  	rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
  	if (rval)
  		ql_dbg(ql_dbg_user, vha, 0x705c,
  		    "DebugFS: Unable to disable FCE (%d).\n", rval);
  
  	ha->flags.fce_enabled = 0;
  
  	mutex_unlock(&ha->fce_mutex);
  out:
  	return single_open(file, qla2x00_dfs_fce_show, vha);
  }
  
  static int
  qla2x00_dfs_fce_release(struct inode *inode, struct file *file)
  {
  	scsi_qla_host_t *vha = inode->i_private;
  	struct qla_hw_data *ha = vha->hw;
  	int rval;
  
  	if (ha->flags.fce_enabled)
  		goto out;
  
  	mutex_lock(&ha->fce_mutex);
  
  	/* Re-enable FCE tracing. */
  	ha->flags.fce_enabled = 1;
  	memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
  	rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
  	    ha->fce_mb, &ha->fce_bufs);
  	if (rval) {
  		ql_dbg(ql_dbg_user, vha, 0x700d,
  		    "DebugFS: Unable to reinitialize FCE (%d).\n", rval);
  		ha->flags.fce_enabled = 0;
  	}
  
  	mutex_unlock(&ha->fce_mutex);
  out:
  	return single_release(inode, file);
  }
  
  static const struct file_operations dfs_fce_ops = {
  	.open		= qla2x00_dfs_fce_open,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  	.release	= qla2x00_dfs_fce_release,
  };
  
  int
  qla2x00_dfs_setup(scsi_qla_host_t *vha)
  {
  	struct qla_hw_data *ha = vha->hw;
  
  	if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha) &&
  	    !IS_QLA27XX(ha))
  		goto out;
  	if (!ha->fce)
  		goto out;
  
  	if (qla2x00_dfs_root)
  		goto create_dir;
  
  	atomic_set(&qla2x00_dfs_root_count, 0);
  	qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
  	if (!qla2x00_dfs_root) {
  		ql_log(ql_log_warn, vha, 0x00f7,
  		    "Unable to create debugfs root directory.\n");
  		goto out;
  	}
  
  create_dir:
  	if (ha->dfs_dir)
  		goto create_nodes;
  
  	mutex_init(&ha->fce_mutex);
  	ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
  	if (!ha->dfs_dir) {
  		ql_log(ql_log_warn, vha, 0x00f8,
  		    "Unable to create debugfs ha directory.\n");
  		goto out;
  	}
  
  	atomic_inc(&qla2x00_dfs_root_count);
  
  create_nodes:
  	ha->dfs_fw_resource_cnt = debugfs_create_file("fw_resource_count",
  	    S_IRUSR, ha->dfs_dir, vha, &dfs_fw_resource_cnt_ops);
  	if (!ha->dfs_fw_resource_cnt) {
  		ql_log(ql_log_warn, vha, 0x00fd,
  		    "Unable to create debugFS fw_resource_count node.\n");
  		goto out;
  	}
  
  	ha->dfs_tgt_counters = debugfs_create_file("tgt_counters", S_IRUSR,
  	    ha->dfs_dir, vha, &dfs_tgt_counters_ops);
  	if (!ha->dfs_tgt_counters) {
  		ql_log(ql_log_warn, vha, 0xd301,
  		    "Unable to create debugFS tgt_counters node.\n");
  		goto out;
  	}
  
  	ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
  	    &dfs_fce_ops);
  	if (!ha->dfs_fce) {
  		ql_log(ql_log_warn, vha, 0x00f9,
  		    "Unable to create debugfs fce node.\n");
  		goto out;
  	}
  out:
  	return 0;
  }
  
  int
  qla2x00_dfs_remove(scsi_qla_host_t *vha)
  {
  	struct qla_hw_data *ha = vha->hw;
  
  	if (ha->dfs_fw_resource_cnt) {
  		debugfs_remove(ha->dfs_fw_resource_cnt);
  		ha->dfs_fw_resource_cnt = NULL;
  	}
  
  	if (ha->dfs_tgt_counters) {
  		debugfs_remove(ha->dfs_tgt_counters);
  		ha->dfs_tgt_counters = NULL;
  	}
  
  	if (ha->dfs_fce) {
  		debugfs_remove(ha->dfs_fce);
  		ha->dfs_fce = NULL;
  	}
  
  	if (ha->dfs_dir) {
  		debugfs_remove(ha->dfs_dir);
  		ha->dfs_dir = NULL;
  		atomic_dec(&qla2x00_dfs_root_count);
  	}
  
  	if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
  	    qla2x00_dfs_root) {
  		debugfs_remove(qla2x00_dfs_root);
  		qla2x00_dfs_root = NULL;
  	}
  
  	return 0;
  }
  