Initial commit
This commit is contained in:
Ole André Vadla Ravnås
commit
169c65d57e
51358 changed files with 23120455 additions and 0 deletions
181
drivers/scsi/qla2xxx/qla_dfs.c
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181
drivers/scsi/qla2xxx/qla_dfs.c
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/*
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* QLogic Fibre Channel HBA Driver
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* Copyright (c) 2003-2013 QLogic Corporation
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*
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* See LICENSE.qla2xxx for copyright and licensing details.
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*/
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#include "qla_def.h"
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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static struct dentry *qla2x00_dfs_root;
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static atomic_t qla2x00_dfs_root_count;
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static int
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qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
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{
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scsi_qla_host_t *vha = s->private;
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uint32_t cnt;
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uint32_t *fce;
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uint64_t fce_start;
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struct qla_hw_data *ha = vha->hw;
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mutex_lock(&ha->fce_mutex);
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seq_printf(s, "FCE Trace Buffer\n");
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seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
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seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
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seq_printf(s, "FCE Enable Registers\n");
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seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
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ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
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ha->fce_mb[5], ha->fce_mb[6]);
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fce = (uint32_t *) ha->fce;
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fce_start = (unsigned long long) ha->fce_dma;
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for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
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if (cnt % 8 == 0)
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seq_printf(s, "\n%llx: ",
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(unsigned long long)((cnt * 4) + fce_start));
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else
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seq_printf(s, " ");
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seq_printf(s, "%08x", *fce++);
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}
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seq_printf(s, "\nEnd\n");
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mutex_unlock(&ha->fce_mutex);
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return 0;
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}
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static int
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qla2x00_dfs_fce_open(struct inode *inode, struct file *file)
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{
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scsi_qla_host_t *vha = inode->i_private;
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struct qla_hw_data *ha = vha->hw;
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int rval;
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if (!ha->flags.fce_enabled)
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goto out;
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mutex_lock(&ha->fce_mutex);
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/* Pause tracing to flush FCE buffers. */
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rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
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if (rval)
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ql_dbg(ql_dbg_user, vha, 0x705c,
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"DebugFS: Unable to disable FCE (%d).\n", rval);
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ha->flags.fce_enabled = 0;
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mutex_unlock(&ha->fce_mutex);
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out:
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return single_open(file, qla2x00_dfs_fce_show, vha);
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}
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static int
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qla2x00_dfs_fce_release(struct inode *inode, struct file *file)
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{
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scsi_qla_host_t *vha = inode->i_private;
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struct qla_hw_data *ha = vha->hw;
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int rval;
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if (ha->flags.fce_enabled)
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goto out;
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mutex_lock(&ha->fce_mutex);
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/* Re-enable FCE tracing. */
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ha->flags.fce_enabled = 1;
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memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
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rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
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ha->fce_mb, &ha->fce_bufs);
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if (rval) {
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ql_dbg(ql_dbg_user, vha, 0x700d,
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"DebugFS: Unable to reinitialize FCE (%d).\n", rval);
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ha->flags.fce_enabled = 0;
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}
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mutex_unlock(&ha->fce_mutex);
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out:
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return single_release(inode, file);
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}
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static const struct file_operations dfs_fce_ops = {
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.open = qla2x00_dfs_fce_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = qla2x00_dfs_fce_release,
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};
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int
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qla2x00_dfs_setup(scsi_qla_host_t *vha)
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{
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struct qla_hw_data *ha = vha->hw;
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if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha))
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goto out;
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if (!ha->fce)
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goto out;
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if (qla2x00_dfs_root)
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goto create_dir;
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atomic_set(&qla2x00_dfs_root_count, 0);
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qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
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if (!qla2x00_dfs_root) {
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ql_log(ql_log_warn, vha, 0x00f7,
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"Unable to create debugfs root directory.\n");
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goto out;
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}
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create_dir:
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if (ha->dfs_dir)
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goto create_nodes;
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mutex_init(&ha->fce_mutex);
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ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
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if (!ha->dfs_dir) {
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ql_log(ql_log_warn, vha, 0x00f8,
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"Unable to create debugfs ha directory.\n");
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goto out;
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}
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atomic_inc(&qla2x00_dfs_root_count);
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create_nodes:
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ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
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&dfs_fce_ops);
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if (!ha->dfs_fce) {
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ql_log(ql_log_warn, vha, 0x00f9,
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"Unable to create debugfs fce node.\n");
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goto out;
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}
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out:
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return 0;
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}
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int
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qla2x00_dfs_remove(scsi_qla_host_t *vha)
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{
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struct qla_hw_data *ha = vha->hw;
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if (ha->dfs_fce) {
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debugfs_remove(ha->dfs_fce);
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ha->dfs_fce = NULL;
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}
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if (ha->dfs_dir) {
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debugfs_remove(ha->dfs_dir);
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ha->dfs_dir = NULL;
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atomic_dec(&qla2x00_dfs_root_count);
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}
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if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
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qla2x00_dfs_root) {
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debugfs_remove(qla2x00_dfs_root);
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qla2x00_dfs_root = NULL;
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}
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return 0;
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}
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