linux/drivers/s390/cio/qdio_debug.c
Jan Glauber e85dea0e41 [S390] qdio: seperate last move index and polling index
The index value that indicated that the input queue moved was also used to
store the index of the first acknowledged buffer. For non-qebsm only the
newest buffer is acknowledged which may be different from the last move index
so two seperate values are needed to track the input queue.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26 15:24:21 +01:00

226 lines
5.9 KiB
C

/*
* drivers/s390/cio/qdio_debug.c
*
* Copyright IBM Corp. 2008
*
* Author: Jan Glauber (jang@linux.vnet.ibm.com)
*/
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <asm/qdio.h>
#include <asm/debug.h>
#include "qdio_debug.h"
#include "qdio.h"
debug_info_t *qdio_dbf_setup;
debug_info_t *qdio_dbf_error;
static struct dentry *debugfs_root;
#define MAX_DEBUGFS_QUEUES 32
static struct dentry *debugfs_queues[MAX_DEBUGFS_QUEUES] = { NULL };
static DEFINE_MUTEX(debugfs_mutex);
#define QDIO_DEBUGFS_NAME_LEN 40
void qdio_allocate_dbf(struct qdio_initialize *init_data,
struct qdio_irq *irq_ptr)
{
char text[20];
DBF_EVENT("qfmt:%1d", init_data->q_format);
DBF_HEX(init_data->adapter_name, 8);
DBF_EVENT("qpff%4x", init_data->qib_param_field_format);
DBF_HEX(&init_data->qib_param_field, sizeof(void *));
DBF_HEX(&init_data->input_slib_elements, sizeof(void *));
DBF_HEX(&init_data->output_slib_elements, sizeof(void *));
DBF_EVENT("niq:%1d noq:%1d", init_data->no_input_qs,
init_data->no_output_qs);
DBF_HEX(&init_data->input_handler, sizeof(void *));
DBF_HEX(&init_data->output_handler, sizeof(void *));
DBF_HEX(&init_data->int_parm, sizeof(long));
DBF_HEX(&init_data->flags, sizeof(long));
DBF_HEX(&init_data->input_sbal_addr_array, sizeof(void *));
DBF_HEX(&init_data->output_sbal_addr_array, sizeof(void *));
DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr);
/* allocate trace view for the interface */
snprintf(text, 20, "qdio_%s", dev_name(&init_data->cdev->dev));
irq_ptr->debug_area = debug_register(text, 2, 1, 16);
debug_register_view(irq_ptr->debug_area, &debug_hex_ascii_view);
debug_set_level(irq_ptr->debug_area, DBF_WARN);
DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created");
}
static int qstat_show(struct seq_file *m, void *v)
{
unsigned char state;
struct qdio_q *q = m->private;
int i;
if (!q)
return 0;
seq_printf(m, "device state indicator: %d\n", *(u32 *)q->irq_ptr->dsci);
seq_printf(m, "nr_used: %d\n", atomic_read(&q->nr_buf_used));
seq_printf(m, "ftc: %d\n", q->first_to_check);
seq_printf(m, "last_move: %d\n", q->last_move);
seq_printf(m, "polling: %d\n", q->u.in.polling);
seq_printf(m, "ack start: %d\n", q->u.in.ack_start);
seq_printf(m, "ack count: %d\n", q->u.in.ack_count);
seq_printf(m, "slsb buffer states:\n");
seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n");
qdio_siga_sync_q(q);
for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
get_buf_state(q, i, &state, 0);
switch (state) {
case SLSB_P_INPUT_NOT_INIT:
case SLSB_P_OUTPUT_NOT_INIT:
seq_printf(m, "N");
break;
case SLSB_P_INPUT_PRIMED:
case SLSB_CU_OUTPUT_PRIMED:
seq_printf(m, "+");
break;
case SLSB_P_INPUT_ACK:
seq_printf(m, "A");
break;
case SLSB_P_INPUT_ERROR:
case SLSB_P_OUTPUT_ERROR:
seq_printf(m, "x");
break;
case SLSB_CU_INPUT_EMPTY:
case SLSB_P_OUTPUT_EMPTY:
seq_printf(m, "-");
break;
case SLSB_P_INPUT_HALTED:
case SLSB_P_OUTPUT_HALTED:
seq_printf(m, ".");
break;
default:
seq_printf(m, "?");
}
if (i == 63)
seq_printf(m, "\n");
}
seq_printf(m, "\n");
seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n");
return 0;
}
static ssize_t qstat_seq_write(struct file *file, const char __user *buf,
size_t count, loff_t *off)
{
struct seq_file *seq = file->private_data;
struct qdio_q *q = seq->private;
if (!q)
return 0;
if (q->is_input_q)
xchg(q->irq_ptr->dsci, 1);
local_bh_disable();
tasklet_schedule(&q->tasklet);
local_bh_enable();
return count;
}
static int qstat_seq_open(struct inode *inode, struct file *filp)
{
return single_open(filp, qstat_show,
filp->f_path.dentry->d_inode->i_private);
}
static void remove_debugfs_entry(struct qdio_q *q)
{
int i;
for (i = 0; i < MAX_DEBUGFS_QUEUES; i++) {
if (!debugfs_queues[i])
continue;
if (debugfs_queues[i]->d_inode->i_private == q) {
debugfs_remove(debugfs_queues[i]);
debugfs_queues[i] = NULL;
}
}
}
static struct file_operations debugfs_fops = {
.owner = THIS_MODULE,
.open = qstat_seq_open,
.read = seq_read,
.write = qstat_seq_write,
.llseek = seq_lseek,
.release = single_release,
};
static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev)
{
int i = 0;
char name[QDIO_DEBUGFS_NAME_LEN];
while (debugfs_queues[i] != NULL) {
i++;
if (i >= MAX_DEBUGFS_QUEUES)
return;
}
snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%s_%d",
dev_name(&cdev->dev),
q->is_input_q ? "input" : "output",
q->nr);
debugfs_queues[i] = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
debugfs_root, q, &debugfs_fops);
if (IS_ERR(debugfs_queues[i]))
debugfs_queues[i] = NULL;
}
void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
{
struct qdio_q *q;
int i;
mutex_lock(&debugfs_mutex);
for_each_input_queue(irq_ptr, q, i)
setup_debugfs_entry(q, cdev);
for_each_output_queue(irq_ptr, q, i)
setup_debugfs_entry(q, cdev);
mutex_unlock(&debugfs_mutex);
}
void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
{
struct qdio_q *q;
int i;
mutex_lock(&debugfs_mutex);
for_each_input_queue(irq_ptr, q, i)
remove_debugfs_entry(q);
for_each_output_queue(irq_ptr, q, i)
remove_debugfs_entry(q);
mutex_unlock(&debugfs_mutex);
}
int __init qdio_debug_init(void)
{
debugfs_root = debugfs_create_dir("qdio_queues", NULL);
qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16);
debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
debug_set_level(qdio_dbf_setup, DBF_INFO);
DBF_EVENT("dbf created\n");
qdio_dbf_error = debug_register("qdio_error", 4, 1, 16);
debug_register_view(qdio_dbf_error, &debug_hex_ascii_view);
debug_set_level(qdio_dbf_error, DBF_INFO);
DBF_ERROR("dbf created\n");
return 0;
}
void qdio_debug_exit(void)
{
debugfs_remove(debugfs_root);
if (qdio_dbf_setup)
debug_unregister(qdio_dbf_setup);
if (qdio_dbf_error)
debug_unregister(qdio_dbf_error);
}