mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
synced 2026-04-23 05:56:14 -04:00
[S390] qdio: new qdio driver.
List of major changes: - split qdio driver into several files - seperation of thin interrupt code - improved handling for multiple thin interrupt devices - inbound and outbound processing now always runs in tasklet context - significant less tasklet schedules per interrupt needed - merged qebsm with non-qebsm handling - cleanup qdio interface and added kerneldoc - coding style Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Utz Bacher <utz.bacher@de.ibm.com> Reviewed-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Jan Glauber
committed by
Heiko Carstens
Heiko Carstens
parent
dae39843f4
commit
779e6e1c72
240
drivers/s390/cio/qdio_debug.c
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240
drivers/s390/cio/qdio_debug.c
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/*
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* drivers/s390/cio/qdio_debug.c
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*
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* Copyright IBM Corp. 2008
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*
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* Author: Jan Glauber (jang@linux.vnet.ibm.com)
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*/
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/debugfs.h>
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#include <asm/qdio.h>
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#include <asm/debug.h>
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#include "qdio_debug.h"
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#include "qdio.h"
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debug_info_t *qdio_dbf_setup;
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debug_info_t *qdio_dbf_trace;
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static struct dentry *debugfs_root;
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#define MAX_DEBUGFS_QUEUES 32
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static struct dentry *debugfs_queues[MAX_DEBUGFS_QUEUES] = { NULL };
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static DEFINE_MUTEX(debugfs_mutex);
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void qdio_allocate_do_dbf(struct qdio_initialize *init_data)
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{
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char dbf_text[20];
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sprintf(dbf_text, "qfmt:%x", init_data->q_format);
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QDIO_DBF_TEXT0(0, setup, dbf_text);
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QDIO_DBF_HEX0(0, setup, init_data->adapter_name, 8);
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sprintf(dbf_text, "qpff%4x", init_data->qib_param_field_format);
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QDIO_DBF_TEXT0(0, setup, dbf_text);
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QDIO_DBF_HEX0(0, setup, &init_data->qib_param_field, sizeof(void *));
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QDIO_DBF_HEX0(0, setup, &init_data->input_slib_elements, sizeof(void *));
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QDIO_DBF_HEX0(0, setup, &init_data->output_slib_elements, sizeof(void *));
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sprintf(dbf_text, "niq:%4x", init_data->no_input_qs);
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QDIO_DBF_TEXT0(0, setup, dbf_text);
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sprintf(dbf_text, "noq:%4x", init_data->no_output_qs);
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QDIO_DBF_TEXT0(0, setup, dbf_text);
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QDIO_DBF_HEX0(0, setup, &init_data->input_handler, sizeof(void *));
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QDIO_DBF_HEX0(0, setup, &init_data->output_handler, sizeof(void *));
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QDIO_DBF_HEX0(0, setup, &init_data->int_parm, sizeof(long));
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QDIO_DBF_HEX0(0, setup, &init_data->flags, sizeof(long));
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QDIO_DBF_HEX0(0, setup, &init_data->input_sbal_addr_array, sizeof(void *));
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QDIO_DBF_HEX0(0, setup, &init_data->output_sbal_addr_array, sizeof(void *));
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}
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static void qdio_unregister_dbf_views(void)
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{
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if (qdio_dbf_setup)
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debug_unregister(qdio_dbf_setup);
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if (qdio_dbf_trace)
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debug_unregister(qdio_dbf_trace);
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}
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static int qdio_register_dbf_views(void)
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{
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qdio_dbf_setup = debug_register("qdio_setup", QDIO_DBF_SETUP_PAGES,
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QDIO_DBF_SETUP_NR_AREAS,
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QDIO_DBF_SETUP_LEN);
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if (!qdio_dbf_setup)
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goto oom;
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debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
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debug_set_level(qdio_dbf_setup, QDIO_DBF_SETUP_LEVEL);
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qdio_dbf_trace = debug_register("qdio_trace", QDIO_DBF_TRACE_PAGES,
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QDIO_DBF_TRACE_NR_AREAS,
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QDIO_DBF_TRACE_LEN);
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if (!qdio_dbf_trace)
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goto oom;
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debug_register_view(qdio_dbf_trace, &debug_hex_ascii_view);
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debug_set_level(qdio_dbf_trace, QDIO_DBF_TRACE_LEVEL);
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return 0;
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oom:
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qdio_unregister_dbf_views();
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return -ENOMEM;
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}
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static int qstat_show(struct seq_file *m, void *v)
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{
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unsigned char state;
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struct qdio_q *q = m->private;
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int i;
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if (!q)
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return 0;
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seq_printf(m, "device state indicator: %d\n", *q->irq_ptr->dsci);
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seq_printf(m, "nr_used: %d\n", atomic_read(&q->nr_buf_used));
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seq_printf(m, "ftc: %d\n", q->first_to_check);
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seq_printf(m, "last_move_ftc: %d\n", q->last_move_ftc);
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seq_printf(m, "polling: %d\n", q->u.in.polling);
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seq_printf(m, "slsb buffer states:\n");
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qdio_siga_sync_q(q);
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for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
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get_buf_state(q, i, &state);
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switch (state) {
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case SLSB_P_INPUT_NOT_INIT:
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case SLSB_P_OUTPUT_NOT_INIT:
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seq_printf(m, "N");
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break;
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case SLSB_P_INPUT_PRIMED:
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case SLSB_CU_OUTPUT_PRIMED:
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seq_printf(m, "+");
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break;
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case SLSB_P_INPUT_ACK:
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seq_printf(m, "A");
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break;
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case SLSB_P_INPUT_ERROR:
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case SLSB_P_OUTPUT_ERROR:
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seq_printf(m, "x");
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break;
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case SLSB_CU_INPUT_EMPTY:
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case SLSB_P_OUTPUT_EMPTY:
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seq_printf(m, "-");
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break;
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case SLSB_P_INPUT_HALTED:
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case SLSB_P_OUTPUT_HALTED:
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seq_printf(m, ".");
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break;
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default:
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seq_printf(m, "?");
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}
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if (i == 63)
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seq_printf(m, "\n");
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}
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seq_printf(m, "\n");
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return 0;
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}
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static ssize_t qstat_seq_write(struct file *file, const char __user *buf,
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size_t count, loff_t *off)
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{
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struct seq_file *seq = file->private_data;
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struct qdio_q *q = seq->private;
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if (!q)
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return 0;
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if (q->is_input_q)
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xchg(q->irq_ptr->dsci, 1);
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local_bh_disable();
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tasklet_schedule(&q->tasklet);
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local_bh_enable();
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return count;
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}
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static int qstat_seq_open(struct inode *inode, struct file *filp)
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{
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return single_open(filp, qstat_show,
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filp->f_path.dentry->d_inode->i_private);
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}
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static void get_queue_name(struct qdio_q *q, struct ccw_device *cdev, char *name)
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{
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memset(name, 0, sizeof(name));
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sprintf(name, "%s", cdev->dev.bus_id);
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if (q->is_input_q)
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sprintf(name + strlen(name), "_input");
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else
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sprintf(name + strlen(name), "_output");
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sprintf(name + strlen(name), "_%d", q->nr);
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}
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static void remove_debugfs_entry(struct qdio_q *q)
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{
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int i;
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for (i = 0; i < MAX_DEBUGFS_QUEUES; i++) {
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if (!debugfs_queues[i])
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continue;
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if (debugfs_queues[i]->d_inode->i_private == q) {
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debugfs_remove(debugfs_queues[i]);
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debugfs_queues[i] = NULL;
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}
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}
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}
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static struct file_operations debugfs_fops = {
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.owner = THIS_MODULE,
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.open = qstat_seq_open,
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.read = seq_read,
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.write = qstat_seq_write,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev)
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{
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int i = 0;
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char name[40];
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while (debugfs_queues[i] != NULL) {
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i++;
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if (i >= MAX_DEBUGFS_QUEUES)
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return;
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}
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get_queue_name(q, cdev, name);
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debugfs_queues[i] = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
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debugfs_root, q, &debugfs_fops);
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}
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void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
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{
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struct qdio_q *q;
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int i;
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mutex_lock(&debugfs_mutex);
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for_each_input_queue(irq_ptr, q, i)
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setup_debugfs_entry(q, cdev);
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for_each_output_queue(irq_ptr, q, i)
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setup_debugfs_entry(q, cdev);
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mutex_unlock(&debugfs_mutex);
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}
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void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
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{
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struct qdio_q *q;
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int i;
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mutex_lock(&debugfs_mutex);
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for_each_input_queue(irq_ptr, q, i)
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remove_debugfs_entry(q);
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for_each_output_queue(irq_ptr, q, i)
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remove_debugfs_entry(q);
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mutex_unlock(&debugfs_mutex);
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}
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int __init qdio_debug_init(void)
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{
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debugfs_root = debugfs_create_dir("qdio_queues", NULL);
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return qdio_register_dbf_views();
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}
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void qdio_debug_exit(void)
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{
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debugfs_remove(debugfs_root);
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qdio_unregister_dbf_views();
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}
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