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path: root/drivers/s390/cio/qdio_debug.c
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Diffstat (limited to 'drivers/s390/cio/qdio_debug.c')
-rw-r--r--drivers/s390/cio/qdio_debug.c240
1 files changed, 240 insertions, 0 deletions
diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c
new file mode 100644
index 00000000000..337aa3087a7
--- /dev/null
+++ b/drivers/s390/cio/qdio_debug.c
@@ -0,0 +1,240 @@
+/*
+ * 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_trace;
+
+static struct dentry *debugfs_root;
+#define MAX_DEBUGFS_QUEUES 32
+static struct dentry *debugfs_queues[MAX_DEBUGFS_QUEUES] = { NULL };
+static DEFINE_MUTEX(debugfs_mutex);
+
+void qdio_allocate_do_dbf(struct qdio_initialize *init_data)
+{
+ char dbf_text[20];
+
+ sprintf(dbf_text, "qfmt:%x", init_data->q_format);
+ QDIO_DBF_TEXT0(0, setup, dbf_text);
+ QDIO_DBF_HEX0(0, setup, init_data->adapter_name, 8);
+ sprintf(dbf_text, "qpff%4x", init_data->qib_param_field_format);
+ QDIO_DBF_TEXT0(0, setup, dbf_text);
+ QDIO_DBF_HEX0(0, setup, &init_data->qib_param_field, sizeof(void *));
+ QDIO_DBF_HEX0(0, setup, &init_data->input_slib_elements, sizeof(void *));
+ QDIO_DBF_HEX0(0, setup, &init_data->output_slib_elements, sizeof(void *));
+ sprintf(dbf_text, "niq:%4x", init_data->no_input_qs);
+ QDIO_DBF_TEXT0(0, setup, dbf_text);
+ sprintf(dbf_text, "noq:%4x", init_data->no_output_qs);
+ QDIO_DBF_TEXT0(0, setup, dbf_text);
+ QDIO_DBF_HEX0(0, setup, &init_data->input_handler, sizeof(void *));
+ QDIO_DBF_HEX0(0, setup, &init_data->output_handler, sizeof(void *));
+ QDIO_DBF_HEX0(0, setup, &init_data->int_parm, sizeof(long));
+ QDIO_DBF_HEX0(0, setup, &init_data->flags, sizeof(long));
+ QDIO_DBF_HEX0(0, setup, &init_data->input_sbal_addr_array, sizeof(void *));
+ QDIO_DBF_HEX0(0, setup, &init_data->output_sbal_addr_array, sizeof(void *));
+}
+
+static void qdio_unregister_dbf_views(void)
+{
+ if (qdio_dbf_setup)
+ debug_unregister(qdio_dbf_setup);
+ if (qdio_dbf_trace)
+ debug_unregister(qdio_dbf_trace);
+}
+
+static int qdio_register_dbf_views(void)
+{
+ qdio_dbf_setup = debug_register("qdio_setup", QDIO_DBF_SETUP_PAGES,
+ QDIO_DBF_SETUP_NR_AREAS,
+ QDIO_DBF_SETUP_LEN);
+ if (!qdio_dbf_setup)
+ goto oom;
+ debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
+ debug_set_level(qdio_dbf_setup, QDIO_DBF_SETUP_LEVEL);
+
+ qdio_dbf_trace = debug_register("qdio_trace", QDIO_DBF_TRACE_PAGES,
+ QDIO_DBF_TRACE_NR_AREAS,
+ QDIO_DBF_TRACE_LEN);
+ if (!qdio_dbf_trace)
+ goto oom;
+ debug_register_view(qdio_dbf_trace, &debug_hex_ascii_view);
+ debug_set_level(qdio_dbf_trace, QDIO_DBF_TRACE_LEVEL);
+ return 0;
+oom:
+ qdio_unregister_dbf_views();
+ return -ENOMEM;
+}
+
+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", *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_ftc: %d\n", q->last_move_ftc);
+ seq_printf(m, "polling: %d\n", q->u.in.polling);
+ seq_printf(m, "slsb buffer states:\n");
+
+ qdio_siga_sync_q(q);
+ for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
+ get_buf_state(q, i, &state);
+ 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");
+ 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 get_queue_name(struct qdio_q *q, struct ccw_device *cdev, char *name)
+{
+ memset(name, 0, sizeof(name));
+ sprintf(name, "%s", cdev->dev.bus_id);
+ if (q->is_input_q)
+ sprintf(name + strlen(name), "_input");
+ else
+ sprintf(name + strlen(name), "_output");
+ sprintf(name + strlen(name), "_%d", q->nr);
+}
+
+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[40];
+
+ while (debugfs_queues[i] != NULL) {
+ i++;
+ if (i >= MAX_DEBUGFS_QUEUES)
+ return;
+ }
+ get_queue_name(q, cdev, name);
+ debugfs_queues[i] = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
+ debugfs_root, q, &debugfs_fops);
+}
+
+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);
+ return qdio_register_dbf_views();
+}
+
+void qdio_debug_exit(void)
+{
+ debugfs_remove(debugfs_root);
+ qdio_unregister_dbf_views();
+}