[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>

drivers/s390/cio/Makefile

@@ -9,4 +9,6 @@ ccw_device-objs += device_id.o device_pgid.o device_status.o
 obj-y += ccw_device.o cmf.o
 obj-$(CONFIG_CHSC_SCH) += chsc_sch.o
 obj-$(CONFIG_CCWGROUP) += ccwgroup.o
+
+qdio-objs := qdio_main.o qdio_thinint.o qdio_debug.o qdio_perf.o qdio_setup.o
 obj-$(CONFIG_QDIO) += qdio.o

drivers/s390/cio/qdio_debug.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_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();
+}

drivers/s390/cio/qdio_debug.h

+/*
+ *  drivers/s390/cio/qdio_debug.h
+ *
+ *  Copyright IBM Corp. 2008
+ *
+ *  Author: Jan Glauber (jang@linux.vnet.ibm.com)
+ */
+#ifndef QDIO_DEBUG_H
+#define QDIO_DEBUG_H
+
+#include <asm/debug.h>
+#include <asm/qdio.h>
+#include "qdio.h"
+
+#define QDIO_DBF_HEX(ex, name, level, addr, len) \
+	do { \
+	if (ex) \
+		debug_exception(qdio_dbf_##name, level, (void *)(addr), len); \
+	else \
+		debug_event(qdio_dbf_##name, level, (void *)(addr), len); \
+	} while (0)
+#define QDIO_DBF_TEXT(ex, name, level, text) \
+	do { \
+	if (ex) \
+		debug_text_exception(qdio_dbf_##name, level, text); \
+	else \
+		debug_text_event(qdio_dbf_##name, level, text); \
+	} while (0)
+
+#define QDIO_DBF_HEX0(ex, name, addr, len) QDIO_DBF_HEX(ex, name, 0, addr, len)
+#define QDIO_DBF_HEX1(ex, name, addr, len) QDIO_DBF_HEX(ex, name, 1, addr, len)
+#define QDIO_DBF_HEX2(ex, name, addr, len) QDIO_DBF_HEX(ex, name, 2, addr, len)
+
+#ifdef CONFIG_QDIO_DEBUG
+#define QDIO_DBF_HEX3(ex, name, addr, len) QDIO_DBF_HEX(ex, name, 3, addr, len)
+#define QDIO_DBF_HEX4(ex, name, addr, len) QDIO_DBF_HEX(ex, name, 4, addr, len)
+#define QDIO_DBF_HEX5(ex, name, addr, len) QDIO_DBF_HEX(ex, name, 5, addr, len)
+#define QDIO_DBF_HEX6(ex, name, addr, len) QDIO_DBF_HEX(ex, name, 6, addr, len)
+#else
+#define QDIO_DBF_HEX3(ex, name, addr, len) do {} while (0)
+#define QDIO_DBF_HEX4(ex, name, addr, len) do {} while (0)
+#define QDIO_DBF_HEX5(ex, name, addr, len) do {} while (0)
+#define QDIO_DBF_HEX6(ex, name, addr, len) do {} while (0)
+#endif /* CONFIG_QDIO_DEBUG */
+
+#define QDIO_DBF_TEXT0(ex, name, text) QDIO_DBF_TEXT(ex, name, 0, text)
+#define QDIO_DBF_TEXT1(ex, name, text) QDIO_DBF_TEXT(ex, name, 1, text)
+#define QDIO_DBF_TEXT2(ex, name, text) QDIO_DBF_TEXT(ex, name, 2, text)
+
+#ifdef CONFIG_QDIO_DEBUG
+#define QDIO_DBF_TEXT3(ex, name, text) QDIO_DBF_TEXT(ex, name, 3, text)
+#define QDIO_DBF_TEXT4(ex, name, text) QDIO_DBF_TEXT(ex, name, 4, text)
+#define QDIO_DBF_TEXT5(ex, name, text) QDIO_DBF_TEXT(ex, name, 5, text)
+#define QDIO_DBF_TEXT6(ex, name, text) QDIO_DBF_TEXT(ex, name, 6, text)
+#else
+#define QDIO_DBF_TEXT3(ex, name, text) do {} while (0)
+#define QDIO_DBF_TEXT4(ex, name, text) do {} while (0)
+#define QDIO_DBF_TEXT5(ex, name, text) do {} while (0)
+#define QDIO_DBF_TEXT6(ex, name, text) do {} while (0)
+#endif /* CONFIG_QDIO_DEBUG */
+
+/* s390dbf views */
+#define QDIO_DBF_SETUP_LEN		8
+#define QDIO_DBF_SETUP_PAGES		4
+#define QDIO_DBF_SETUP_NR_AREAS		1
+
+#define QDIO_DBF_TRACE_LEN		8
+#define QDIO_DBF_TRACE_NR_AREAS		2
+
+#ifdef CONFIG_QDIO_DEBUG
+#define QDIO_DBF_TRACE_PAGES		16
+#define QDIO_DBF_SETUP_LEVEL		6
+#define QDIO_DBF_TRACE_LEVEL		4
+#else /* !CONFIG_QDIO_DEBUG */
+#define QDIO_DBF_TRACE_PAGES		4
+#define QDIO_DBF_SETUP_LEVEL		2
+#define QDIO_DBF_TRACE_LEVEL		2
+#endif /* CONFIG_QDIO_DEBUG */
+
+extern debug_info_t *qdio_dbf_setup;
+extern debug_info_t *qdio_dbf_trace;
+
+void qdio_allocate_do_dbf(struct qdio_initialize *init_data);
+void debug_print_bstat(struct qdio_q *q);
+void qdio_setup_debug_entries(struct qdio_irq *irq_ptr,
+			      struct ccw_device *cdev);
+void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr,
+				 struct ccw_device *cdev);
+int qdio_debug_init(void);
+void qdio_debug_exit(void);
+#endif

drivers/s390/cio/qdio_perf.c

+/*
+ *  drivers/s390/cio/qdio_perf.c
+ *
+ *  Copyright IBM Corp. 2008
+ *
+ *  Author: Jan Glauber (jang@linux.vnet.ibm.com)
+ */
+#include <linux/kernel.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <asm/ccwdev.h>
+
+#include "cio.h"
+#include "css.h"
+#include "device.h"
+#include "ioasm.h"
+#include "chsc.h"
+#include "qdio_debug.h"
+#include "qdio_perf.h"
+
+int qdio_performance_stats;
+struct qdio_perf_stats perf_stats;
+
+#ifdef CONFIG_PROC_FS
+static struct proc_dir_entry *qdio_perf_pde;
+#endif
+
+inline void qdio_perf_stat_inc(atomic_long_t *count)
+{
+	if (qdio_performance_stats)
+		atomic_long_inc(count);
+}
+
+inline void qdio_perf_stat_dec(atomic_long_t *count)
+{
+	if (qdio_performance_stats)
+		atomic_long_dec(count);
+}
+
+/*
+ * procfs functions
+ */
+static int qdio_perf_proc_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "Number of qdio interrupts\t\t\t: %li\n",
+		   (long)atomic_long_read(&perf_stats.qdio_int));
+	seq_printf(m, "Number of PCI interrupts\t\t\t: %li\n",
+		   (long)atomic_long_read(&perf_stats.pci_int));
+	seq_printf(m, "Number of adapter interrupts\t\t\t: %li\n",
+		   (long)atomic_long_read(&perf_stats.thin_int));
+	seq_printf(m, "\n");
+	seq_printf(m, "Inbound tasklet runs\t\t\t\t: %li\n",
+		   (long)atomic_long_read(&perf_stats.tasklet_inbound));
+	seq_printf(m, "Outbound tasklet runs\t\t\t\t: %li\n",
+		   (long)atomic_long_read(&perf_stats.tasklet_outbound));
+	seq_printf(m, "Adapter interrupt tasklet runs/loops\t\t: %li/%li\n",
+		   (long)atomic_long_read(&perf_stats.tasklet_thinint),
+		   (long)atomic_long_read(&perf_stats.tasklet_thinint_loop));
+	seq_printf(m, "Adapter interrupt inbound tasklet runs/loops\t: %li/%li\n",
+		   (long)atomic_long_read(&perf_stats.thinint_inbound),
+		   (long)atomic_long_read(&perf_stats.thinint_inbound_loop));
+	seq_printf(m, "\n");
+	seq_printf(m, "Number of SIGA In issued\t\t\t: %li\n",
+		   (long)atomic_long_read(&perf_stats.siga_in));
+	seq_printf(m, "Number of SIGA Out issued\t\t\t: %li\n",
+		   (long)atomic_long_read(&perf_stats.siga_out));
+	seq_printf(m, "Number of SIGA Sync issued\t\t\t: %li\n",
+		   (long)atomic_long_read(&perf_stats.siga_sync));
+	seq_printf(m, "\n");
+	seq_printf(m, "Number of inbound transfers\t\t\t: %li\n",
+		   (long)atomic_long_read(&perf_stats.inbound_handler));
+	seq_printf(m, "Number of outbound transfers\t\t\t: %li\n",
+		   (long)atomic_long_read(&perf_stats.outbound_handler));
+	seq_printf(m, "\n");
+	seq_printf(m, "Number of fast requeues (outg. SBAL w/o SIGA)\t: %li\n",
+		   (long)atomic_long_read(&perf_stats.fast_requeue));
+	seq_printf(m, "Number of outbound tasklet mod_timer calls\t: %li\n",
+		   (long)atomic_long_read(&perf_stats.debug_tl_out_timer));
+	seq_printf(m, "Number of stop polling calls\t\t\t: %li\n",
+		   (long)atomic_long_read(&perf_stats.debug_stop_polling));
+	seq_printf(m, "AI inbound tasklet loops after stop polling\t: %li\n",
+		   (long)atomic_long_read(&perf_stats.thinint_inbound_loop2));
+	seq_printf(m, "\n");
+	return 0;
+}
+static int qdio_perf_seq_open(struct inode *inode, struct file *filp)
+{
+	return single_open(filp, qdio_perf_proc_show, NULL);
+}
+
+static struct file_operations qdio_perf_proc_fops = {
+	.owner	 = THIS_MODULE,
+	.open	 = qdio_perf_seq_open,
+	.read	 = seq_read,
+	.llseek  = seq_lseek,
+	.release = single_release,
+};
+
+/*
+ * sysfs functions
+ */
+static ssize_t qdio_perf_stats_show(struct bus_type *bus, char *buf)
+{
+	return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
+}
+
+static ssize_t qdio_perf_stats_store(struct bus_type *bus,
+			      const char *buf, size_t count)
+{
+	unsigned long i;
+
+	if (strict_strtoul(buf, 16, &i) != 0)
+		return -EINVAL;
+	if ((i != 0) && (i != 1))
+		return -EINVAL;
+	if (i == qdio_performance_stats)
+		return count;
+
+	qdio_performance_stats = i;
+	/* reset performance statistics */
+	if (i == 0)
+		memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
+	return count;
+}
+
+static BUS_ATTR(qdio_performance_stats, 0644, qdio_perf_stats_show,
+		qdio_perf_stats_store);
+
+int __init qdio_setup_perf_stats(void)
+{
+	int rc;
+
+	rc = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
+	if (rc)
+		return rc;
+
+#ifdef CONFIG_PROC_FS
+	memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
+	qdio_perf_pde = proc_create("qdio_perf", S_IFREG | S_IRUGO,
+				    NULL, &qdio_perf_proc_fops);
+#endif
+	return 0;
+}
+
+void __exit qdio_remove_perf_stats(void)
+{
+#ifdef CONFIG_PROC_FS
+	remove_proc_entry("qdio_perf", NULL);
+#endif
+	bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
+}

drivers/s390/cio/qdio_perf.h

+/*
+ *  drivers/s390/cio/qdio_perf.h
+ *
+ *  Copyright IBM Corp. 2008
+ *
+ *  Author: Jan Glauber (jang@linux.vnet.ibm.com)
+ */
+#ifndef QDIO_PERF_H
+#define QDIO_PERF_H
+
+#include <linux/types.h>
+#include <linux/device.h>
+#include <asm/atomic.h>
+
+struct qdio_perf_stats {
+	/* interrupt handler calls */
+	atomic_long_t qdio_int;
+	atomic_long_t pci_int;
+	atomic_long_t thin_int;
+
+	/* tasklet runs */
+	atomic_long_t tasklet_inbound;
+	atomic_long_t tasklet_outbound;
+	atomic_long_t tasklet_thinint;
+	atomic_long_t tasklet_thinint_loop;
+	atomic_long_t thinint_inbound;
+	atomic_long_t thinint_inbound_loop;
+	atomic_long_t thinint_inbound_loop2;
+
+	/* signal adapter calls */
+	atomic_long_t siga_out;
+	atomic_long_t siga_in;
+	atomic_long_t siga_sync;
+
+	/* misc */
+	atomic_long_t inbound_handler;
+	atomic_long_t outbound_handler;
+	atomic_long_t fast_requeue;
+
+	/* for debugging */
+	atomic_long_t debug_tl_out_timer;
+	atomic_long_t debug_stop_polling;
+};
+
+extern struct qdio_perf_stats perf_stats;
+extern int qdio_performance_stats;
+
+int qdio_setup_perf_stats(void);
+void qdio_remove_perf_stats(void);
+
+extern void qdio_perf_stat_inc(atomic_long_t *count);
+extern void qdio_perf_stat_dec(atomic_long_t *count);
+
+#endif

drivers/s390/cio/qdio_thinint.c

+/*
+ * linux/drivers/s390/cio/thinint_qdio.c
+ *
+ * thin interrupt support for qdio
+ *
+ * Copyright 2000-2008 IBM Corp.
+ * Author(s): Utz Bacher <utz.bacher@de.ibm.com>
+ *	      Cornelia Huck <cornelia.huck@de.ibm.com>
+ *	      Jan Glauber <jang@linux.vnet.ibm.com>
+ */
+#include <linux/io.h>
+#include <asm/atomic.h>
+#include <asm/debug.h>
+#include <asm/qdio.h>
+#include <asm/airq.h>
+#include <asm/isc.h>
+
+#include "cio.h"
+#include "ioasm.h"
+#include "qdio.h"
+#include "qdio_debug.h"
+#include "qdio_perf.h"
+
+/*
+ * Restriction: only 63 iqdio subchannels would have its own indicator,
+ * after that, subsequent subchannels share one indicator
+ */
+#define TIQDIO_NR_NONSHARED_IND		63
+#define TIQDIO_NR_INDICATORS		(TIQDIO_NR_NONSHARED_IND + 1)
+#define TIQDIO_SHARED_IND		63
+
+/* list of thin interrupt input queues */
+static LIST_HEAD(tiq_list);
+
+/* adapter local summary indicator */
+static unsigned char *tiqdio_alsi;
+
+/* device state change indicators */
+struct indicator_t {
+	u32 ind;	/* u32 because of compare-and-swap performance */
+	atomic_t count; /* use count, 0 or 1 for non-shared indicators */
+};
+static struct indicator_t *q_indicators;
+
+static void tiqdio_tasklet_fn(unsigned long data);
+static DECLARE_TASKLET(tiqdio_tasklet, tiqdio_tasklet_fn, 0);
+
+static int css_qdio_omit_svs;
+
+static inline unsigned long do_clear_global_summary(void)
+{
+	register unsigned long __fn asm("1") = 3;
+	register unsigned long __tmp asm("2");
+	register unsigned long __time asm("3");
+
+	asm volatile(
+		"	.insn	rre,0xb2650000,2,0"
+		: "+d" (__fn), "=d" (__tmp), "=d" (__time));
+	return __time;
+}
+
+/* returns addr for the device state change indicator */
+static u32 *get_indicator(void)
+{
+	int i;
+
+	for (i = 0; i < TIQDIO_NR_NONSHARED_IND; i++)
+		if (!atomic_read(&q_indicators[i].count)) {
+			atomic_set(&q_indicators[i].count, 1);
+			return &q_indicators[i].ind;
+		}
+
+	/* use the shared indicator */
+	atomic_inc(&q_indicators[TIQDIO_SHARED_IND].count);
+	return &q_indicators[TIQDIO_SHARED_IND].ind;
+}
+
+static void put_indicator(u32 *addr)
+{
+	int i;
+
+	if (!addr)
+		return;
+	i = ((unsigned long)addr - (unsigned long)q_indicators) /
+		sizeof(struct indicator_t);
+	atomic_dec(&q_indicators[i].count);
+}
+
+void tiqdio_add_input_queues(struct qdio_irq *irq_ptr)
+{
+	struct qdio_q *q;
+	int i;
+
+	/* No TDD facility? If we must use SIGA-s we can also omit SVS. */
+	if (!css_qdio_omit_svs && irq_ptr->siga_flag.sync)
+		css_qdio_omit_svs = 1;
+
+	for_each_input_queue(irq_ptr, q, i) {
+		list_add_rcu(&q->entry, &tiq_list);
+		synchronize_rcu();
+	}
+	xchg(irq_ptr->dsci, 1);
+	tasklet_schedule(&tiqdio_tasklet);
+}
+
+/*
+ * we cannot stop the tiqdio tasklet here since it is for all
+ * thinint qdio devices and it must run as long as there is a
+ * thinint device left
+ */
+void tiqdio_remove_input_queues(struct qdio_irq *irq_ptr)
+{
+	struct qdio_q *q;
+	int i;
+
+	for_each_input_queue(irq_ptr, q, i) {
+		list_del_rcu(&q->entry);
+		synchronize_rcu();
+	}
+}
+
+static inline int tiqdio_inbound_q_done(struct qdio_q *q)
+{
+	unsigned char state;
+
+	if (!atomic_read(&q->nr_buf_used))
+		return 1;
+
+	qdio_siga_sync_q(q);
+	get_buf_state(q, q->first_to_check, &state);
+
+	if (state == SLSB_P_INPUT_PRIMED)
+		/* more work coming */
+		return 0;
+	return 1;
+}
+
+static inline int shared_ind(struct qdio_irq *irq_ptr)
+{
+	return irq_ptr->dsci == &q_indicators[TIQDIO_SHARED_IND].ind;
+}
+
+static void __tiqdio_inbound_processing(struct qdio_q *q)
+{
+	qdio_perf_stat_inc(&perf_stats.thinint_inbound);
+	qdio_sync_after_thinint(q);
+
+	/*
+	 * Maybe we have work on our outbound queues... at least
+	 * we have to check the PCI capable queues.
+	 */
+	qdio_check_outbound_after_thinint(q);
+
+again:
+	if (!qdio_inbound_q_moved(q))
+		return;
+
+	qdio_kick_inbound_handler(q);
+
+	if (!tiqdio_inbound_q_done(q)) {
+		qdio_perf_stat_inc(&perf_stats.thinint_inbound_loop);
+		goto again;
+	}
+
+	qdio_stop_polling(q);
+	/*
+	 * We need to check again to not lose initiative after
+	 * resetting the ACK state.
+	 */
+	if (!tiqdio_inbound_q_done(q)) {
+		qdio_perf_stat_inc(&perf_stats.thinint_inbound_loop2);
+		goto again;
+	}
+}
+
+void tiqdio_inbound_processing(unsigned long data)
+{
+	struct qdio_q *q = (struct qdio_q *)data;
+
+	__tiqdio_inbound_processing(q);
+}
+
+/* check for work on all inbound thinint queues */
+static void tiqdio_tasklet_fn(unsigned long data)
+{
+	struct qdio_q *q;
+
+	qdio_perf_stat_inc(&perf_stats.tasklet_thinint);
+again:
+
+	/* protect tiq_list entries, only changed in activate or shutdown */
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(q, &tiq_list, entry)
+		/* only process queues from changed sets */
+		if (*q->irq_ptr->dsci) {
+
+			/* only clear it if the indicator is non-shared */
+			if (!shared_ind(q->irq_ptr))
+				xchg(q->irq_ptr->dsci, 0);
+			/*
+			 * don't call inbound processing directly since
+			 * that could starve other thinint queues
+			 */
+			tasklet_schedule(&q->tasklet);
+		}
+
+	rcu_read_unlock();
+
+	/*
+	 * if we used the shared indicator clear it now after all queues
+	 * were processed
+	 */
+	if (atomic_read(&q_indicators[TIQDIO_SHARED_IND].count)) {
+		xchg(&q_indicators[TIQDIO_SHARED_IND].ind, 0);
+
+		/* prevent racing */
+		if (*tiqdio_alsi)
+			xchg(&q_indicators[TIQDIO_SHARED_IND].ind, 1);
+	}
+
+	/* check for more work */
+	if (*tiqdio_alsi) {
+		xchg(tiqdio_alsi, 0);
+		qdio_perf_stat_inc(&perf_stats.tasklet_thinint_loop);
+		goto again;
+	}
+}
+
+/**
+ * tiqdio_thinint_handler - thin interrupt handler for qdio
+ * @ind: pointer to adapter local summary indicator
+ * @drv_data: NULL
+ */
+static void tiqdio_thinint_handler(void *ind, void *drv_data)
+{
+	qdio_perf_stat_inc(&perf_stats.thin_int);
+
+	/*
+	 * SVS only when needed: issue SVS to benefit from iqdio interrupt
+	 * avoidance (SVS clears adapter interrupt suppression overwrite)
+	 */
+	if (!css_qdio_omit_svs)
+		do_clear_global_summary();
+
+	/*
+	 * reset local summary indicator (tiqdio_alsi) to stop adapter
+	 * interrupts for now, the tasklet will clean all dsci's
+	 */
+	xchg((u8 *)ind, 0);
+	tasklet_hi_schedule(&tiqdio_tasklet);
+}
+
+static int set_subchannel_ind(struct qdio_irq *irq_ptr, int reset)
+{
+	struct scssc_area *scssc_area;
+	char dbf_text[15];
+	void *ptr;
+	int rc;
+
+	scssc_area = (struct scssc_area *)irq_ptr->chsc_page;
+	memset(scssc_area, 0, PAGE_SIZE);
+
+	if (reset) {
+		scssc_area->summary_indicator_addr = 0;
+		scssc_area->subchannel_indicator_addr = 0;
+	} else {
+		scssc_area->summary_indicator_addr = virt_to_phys(tiqdio_alsi);
+		scssc_area->subchannel_indicator_addr =
+			virt_to_phys(irq_ptr->dsci);
+	}
+
+	scssc_area->request = (struct chsc_header) {
+		.length = 0x0fe0,
+		.code	= 0x0021,
+	};
+	scssc_area->operation_code = 0;
+	scssc_area->ks = PAGE_DEFAULT_KEY;
+	scssc_area->kc = PAGE_DEFAULT_KEY;
+	scssc_area->isc = QDIO_AIRQ_ISC;
+	scssc_area->schid = irq_ptr->schid;
+
+	/* enable the time delay disablement facility */
+	if (css_general_characteristics.aif_tdd)
+		scssc_area->word_with_d_bit = 0x10000000;
+
+	rc = chsc(scssc_area);
+	if (rc)
+		return -EIO;
+
+	rc = chsc_error_from_response(scssc_area->response.code);
+	if (rc) {
+		sprintf(dbf_text, "sidR%4x", scssc_area->response.code);
+		QDIO_DBF_TEXT1(0, trace, dbf_text);
+		QDIO_DBF_TEXT1(0, setup, dbf_text);
+		ptr = &scssc_area->response;
+		QDIO_DBF_HEX2(1, setup, &ptr, QDIO_DBF_SETUP_LEN);
+		return rc;
+	}
+
+	QDIO_DBF_TEXT2(0, setup, "setscind");
+	QDIO_DBF_HEX2(0, setup, &scssc_area->summary_indicator_addr,
+		      sizeof(unsigned long));
+	QDIO_DBF_HEX2(0, setup, &scssc_area->subchannel_indicator_addr,
+		      sizeof(unsigned long));
+	return 0;
+}
+
+/* allocate non-shared indicators and shared indicator */
+int __init tiqdio_allocate_memory(void)
+{
+	q_indicators = kzalloc(sizeof(struct indicator_t) * TIQDIO_NR_INDICATORS,
+			     GFP_KERNEL);
+	if (!q_indicators)
+		return -ENOMEM;
+	return 0;
+}
+
+void tiqdio_free_memory(void)
+{
+	kfree(q_indicators);
+}
+
+int __init tiqdio_register_thinints(void)
+{
+	char dbf_text[20];
+
+	isc_register(QDIO_AIRQ_ISC);
+	tiqdio_alsi = s390_register_adapter_interrupt(&tiqdio_thinint_handler,
+						      NULL, QDIO_AIRQ_ISC);
+	if (IS_ERR(tiqdio_alsi)) {
+		sprintf(dbf_text, "regthn%lx", PTR_ERR(tiqdio_alsi));
+		QDIO_DBF_TEXT0(0, setup, dbf_text);
+		tiqdio_alsi = NULL;
+		isc_unregister(QDIO_AIRQ_ISC);
+		return -ENOMEM;
+	}
+	return 0;
+}
+
+int qdio_establish_thinint(struct qdio_irq *irq_ptr)
+{
+	if (!is_thinint_irq(irq_ptr))
+		return 0;
+
+	/* Check for aif time delay disablement. If installed,
+	 * omit SVS even under LPAR
+	 */
+	if (css_general_characteristics.aif_tdd)
+		css_qdio_omit_svs = 1;
+	return set_subchannel_ind(irq_ptr, 0);
+}
+
+void qdio_setup_thinint(struct qdio_irq *irq_ptr)
+{
+	if (!is_thinint_irq(irq_ptr))
+		return;
+	irq_ptr->dsci = get_indicator();
+	QDIO_DBF_HEX1(0, setup, &irq_ptr->dsci, sizeof(void *));
+}
+
+void qdio_shutdown_thinint(struct qdio_irq *irq_ptr)
+{
+	if (!is_thinint_irq(irq_ptr))
+		return;
+
+	/* reset adapter interrupt indicators */
+	put_indicator(irq_ptr->dsci);
+	set_subchannel_ind(irq_ptr, 1);
+}
+
+void __exit tiqdio_unregister_thinints(void)
+{
+	tasklet_disable(&tiqdio_tasklet);
+
+	if (tiqdio_alsi) {
+		s390_unregister_adapter_interrupt(tiqdio_alsi, QDIO_AIRQ_ISC);
+		isc_unregister(QDIO_AIRQ_ISC);
+	}
+}

drivers/s390/net/qeth_core.h

@@ -239,11 +239,6 @@ static inline int qeth_is_ipa_enabled(struct qeth_ipa_info *ipa,
 /*not used unless the microcode gets patched*/
 #define QETH_PCI_TIMER_VALUE(card) 3
 
-#define QETH_MIN_INPUT_THRESHOLD 1
-#define QETH_MAX_INPUT_THRESHOLD 500
-#define QETH_MIN_OUTPUT_THRESHOLD 1
-#define QETH_MAX_OUTPUT_THRESHOLD 300
-
 /* priority queing */
 #define QETH_PRIOQ_DEFAULT QETH_NO_PRIO_QUEUEING
 #define QETH_DEFAULT_QUEUE    2
@@ -811,17 +806,14 @@ int qeth_send_ipa_cmd(struct qeth_card *, struct qeth_cmd_buffer *,
 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *,
 			enum qeth_ipa_cmds, enum qeth_prot_versions);
 int qeth_query_setadapterparms(struct qeth_card *);
-int qeth_check_qdio_errors(struct qdio_buffer *, unsigned int,
-		       unsigned int, const char *);
+int qeth_check_qdio_errors(struct qdio_buffer *, unsigned int, const char *);
 void qeth_queue_input_buffer(struct qeth_card *, int);
 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *,
 		struct qdio_buffer *, struct qdio_buffer_element **, int *,
 		struct qeth_hdr **);
 void qeth_schedule_recovery(struct qeth_card *);
 void qeth_qdio_output_handler(struct ccw_device *, unsigned int,
-			unsigned int, unsigned int,
-			unsigned int, int, int,
-			unsigned long);
+			int, int, int, unsigned long);
 void qeth_clear_ipacmd_list(struct qeth_card *);
 int qeth_qdio_clear_card(struct qeth_card *, int);
 void qeth_clear_working_pool_list(struct qeth_card *);

drivers/s390/net/qeth_core_main.c

@@ -2073,7 +2073,7 @@ static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
 static int qeth_qdio_activate(struct qeth_card *card)
 {
 	QETH_DBF_TEXT(SETUP, 3, "qdioact");
-	return qdio_activate(CARD_DDEV(card), 0);
+	return qdio_activate(CARD_DDEV(card));
 }
 
 static int qeth_dm_act(struct qeth_card *card)
@@ -2349,16 +2349,11 @@ int qeth_init_qdio_queues(struct qeth_card *card)
 	card->qdio.in_q->next_buf_to_init =
 		card->qdio.in_buf_pool.buf_count - 1;
 	rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
-		     card->qdio.in_buf_pool.buf_count - 1, NULL);
+		     card->qdio.in_buf_pool.buf_count - 1);
 	if (rc) {
 		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 		return rc;
 	}
-	rc = qdio_synchronize(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0);
-	if (rc) {
-		QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
-		return rc;
-	}
 	/* outbound queue */
 	for (i = 0; i < card->qdio.no_out_queues; ++i) {
 		memset(card->qdio.out_qs[i]->qdio_bufs, 0,
@@ -2559,9 +2554,9 @@ int qeth_query_setadapterparms(struct qeth_card *card)
 EXPORT_SYMBOL_GPL(qeth_query_setadapterparms);
 
 int qeth_check_qdio_errors(struct qdio_buffer *buf, unsigned int qdio_error,
-		unsigned int siga_error, const char *dbftext)
+		const char *dbftext)
 {
-	if (qdio_error || siga_error) {
+	if (qdio_error) {
 		QETH_DBF_TEXT(TRACE, 2, dbftext);
 		QETH_DBF_TEXT(QERR, 2, dbftext);
 		QETH_DBF_TEXT_(QERR, 2, " F15=%02X",
@@ -2569,7 +2564,6 @@ int qeth_check_qdio_errors(struct qdio_buffer *buf, unsigned int qdio_error,
 		QETH_DBF_TEXT_(QERR, 2, " F14=%02X",
 			       buf->element[14].flags & 0xff);
 		QETH_DBF_TEXT_(QERR, 2, " qerr=%X", qdio_error);
-		QETH_DBF_TEXT_(QERR, 2, " serr=%X", siga_error);
 		return 1;
 	}
 	return 0;
@@ -2622,9 +2616,8 @@ void qeth_queue_input_buffer(struct qeth_card *card, int index)
 			card->perf_stats.inbound_do_qdio_start_time =
 				qeth_get_micros();
 		}
-		rc = do_QDIO(CARD_DDEV(card),
-			     QDIO_FLAG_SYNC_INPUT | QDIO_FLAG_UNDER_INTERRUPT,
-			     0, queue->next_buf_to_init, count, NULL);
+		rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
+			     queue->next_buf_to_init, count);
 		if (card->options.performance_stats)
 			card->perf_stats.inbound_do_qdio_time +=
 				qeth_get_micros() -
@@ -2643,14 +2636,13 @@ void qeth_queue_input_buffer(struct qeth_card *card, int index)
 EXPORT_SYMBOL_GPL(qeth_queue_input_buffer);
 
 static int qeth_handle_send_error(struct qeth_card *card,
-		struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err,
-		unsigned int siga_err)
+		struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
 {
 	int sbalf15 = buffer->buffer->element[15].flags & 0xff;
-	int cc = siga_err & 3;
+	int cc = qdio_err & 3;
 
 	QETH_DBF_TEXT(TRACE, 6, "hdsnderr");
-	qeth_check_qdio_errors(buffer->buffer, qdio_err, siga_err, "qouterr");
+	qeth_check_qdio_errors(buffer->buffer, qdio_err, "qouterr");
 	switch (cc) {
 	case 0:
 		if (qdio_err) {
@@ -2662,7 +2654,7 @@ static int qeth_handle_send_error(struct qeth_card *card,
 		}
 		return QETH_SEND_ERROR_NONE;
 	case 2:
-		if (siga_err & QDIO_SIGA_ERROR_B_BIT_SET) {
+		if (qdio_err & QDIO_ERROR_SIGA_BUSY) {
 			QETH_DBF_TEXT(TRACE, 1, "SIGAcc2B");
 			QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 			return QETH_SEND_ERROR_KICK_IT;
@@ -2758,8 +2750,8 @@ static int qeth_flush_buffers_on_no_pci(struct qeth_qdio_out_q *queue)
 	return 0;
 }
 
-static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int under_int,
-		int index, int count)
+static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
+			       int count)
 {
 	struct qeth_qdio_out_buffer *buf;
 	int rc;
@@ -2807,12 +2799,10 @@ static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int under_int,
 			qeth_get_micros();
 	}
 	qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
-	if (under_int)
-		qdio_flags |= QDIO_FLAG_UNDER_INTERRUPT;
 	if (atomic_read(&queue->set_pci_flags_count))
 		qdio_flags |= QDIO_FLAG_PCI_OUT;
 	rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
-		     queue->queue_no, index, count, NULL);
+		     queue->queue_no, index, count);
 	if (queue->card->options.performance_stats)
 		queue->card->perf_stats.outbound_do_qdio_time +=
 			qeth_get_micros() -
@@ -2866,16 +2856,15 @@ static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
 				queue->card->perf_stats.bufs_sent_pack +=
 					flush_cnt;
 			if (flush_cnt)
-				qeth_flush_buffers(queue, 1, index, flush_cnt);
+				qeth_flush_buffers(queue, index, flush_cnt);
 			atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
 		}
 	}
 }
 
-void qeth_qdio_output_handler(struct ccw_device *ccwdev, unsigned int status,
-		unsigned int qdio_error, unsigned int siga_error,
-		unsigned int __queue, int first_element, int count,
-		unsigned long card_ptr)
+void qeth_qdio_output_handler(struct ccw_device *ccwdev,
+		unsigned int qdio_error, int __queue, int first_element,
+		int count, unsigned long card_ptr)
 {
 	struct qeth_card *card        = (struct qeth_card *) card_ptr;
 	struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
@@ -2883,16 +2872,13 @@ void qeth_qdio_output_handler(struct ccw_device *ccwdev, unsigned int status,
 	int i;
 
 	QETH_DBF_TEXT(TRACE, 6, "qdouhdl");
-	if (status & QDIO_STATUS_LOOK_FOR_ERROR) {
-		if (status & QDIO_STATUS_ACTIVATE_CHECK_CONDITION) {
+	if (qdio_error & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 		QETH_DBF_TEXT(TRACE, 2, "achkcond");
 		QETH_DBF_TEXT_(TRACE, 2, "%s", CARD_BUS_ID(card));
-			QETH_DBF_TEXT_(TRACE, 2, "%08x", status);
 		netif_stop_queue(card->dev);
 		qeth_schedule_recovery(card);
 		return;
 	}
-	}
 	if (card->options.performance_stats) {
 		card->perf_stats.outbound_handler_cnt++;
 		card->perf_stats.outbound_handler_start_time =
@@ -2901,8 +2887,7 @@ void qeth_qdio_output_handler(struct ccw_device *ccwdev, unsigned int status,
 	for (i = first_element; i < (first_element + count); ++i) {
 		buffer = &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q];
 		/*we only handle the KICK_IT error by doing a recovery */
-		if (qeth_handle_send_error(card, buffer,
-					   qdio_error, siga_error)
+		if (qeth_handle_send_error(card, buffer, qdio_error)
 				== QETH_SEND_ERROR_KICK_IT){
 			netif_stop_queue(card->dev);
 			qeth_schedule_recovery(card);
@@ -3164,11 +3149,11 @@ int qeth_do_send_packet_fast(struct qeth_card *card,
 	atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
 	if (ctx == NULL) {
 		qeth_fill_buffer(queue, buffer, skb);
-		qeth_flush_buffers(queue, 0, index, 1);
+		qeth_flush_buffers(queue, index, 1);
 	} else {
 		flush_cnt = qeth_eddp_fill_buffer(queue, ctx, index);
 		WARN_ON(buffers_needed != flush_cnt);
-		qeth_flush_buffers(queue, 0, index, flush_cnt);
+		qeth_flush_buffers(queue, index, flush_cnt);
 	}
 	return 0;
 out:
@@ -3221,8 +3206,8 @@ int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
 				 * again */
 				if (atomic_read(&buffer->state) !=
 						QETH_QDIO_BUF_EMPTY){
-					qeth_flush_buffers(queue, 0,
-						start_index, flush_count);
+					qeth_flush_buffers(queue, start_index,
+							   flush_count);
 					atomic_set(&queue->state,
 						QETH_OUT_Q_UNLOCKED);
 					return -EBUSY;
@@ -3253,7 +3238,7 @@ int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
 	flush_count += tmp;
 out:
 	if (flush_count)
-		qeth_flush_buffers(queue, 0, start_index, flush_count);
+		qeth_flush_buffers(queue, start_index, flush_count);
 	else if (!atomic_read(&queue->set_pci_flags_count))
 		atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
 	/*
@@ -3274,7 +3259,7 @@ int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
 		if (!flush_count && !atomic_read(&queue->set_pci_flags_count))
 			flush_count += qeth_flush_buffers_on_no_pci(queue);
 		if (flush_count)
-			qeth_flush_buffers(queue, 0, start_index, flush_count);
+			qeth_flush_buffers(queue, start_index, flush_count);
 	}
 	/* at this point the queue is UNLOCKED again */
 	if (queue->card->options.performance_stats && do_pack)
@@ -3686,10 +3671,6 @@ static int qeth_qdio_establish(struct qeth_card *card)
 	init_data.q_format               = qeth_get_qdio_q_format(card);
 	init_data.qib_param_field_format = 0;
 	init_data.qib_param_field        = qib_param_field;
-	init_data.min_input_threshold    = QETH_MIN_INPUT_THRESHOLD;
-	init_data.max_input_threshold    = QETH_MAX_INPUT_THRESHOLD;
-	init_data.min_output_threshold   = QETH_MIN_OUTPUT_THRESHOLD;
-	init_data.max_output_threshold   = QETH_MAX_OUTPUT_THRESHOLD;
 	init_data.no_input_qs            = 1;
 	init_data.no_output_qs           = card->qdio.no_out_queues;
 	init_data.input_handler          = card->discipline.input_handler;
@@ -3751,8 +3732,9 @@ static int qeth_core_driver_group(const char *buf, struct device *root_dev,
 
 int qeth_core_hardsetup_card(struct qeth_card *card)
 {
+	struct qdio_ssqd_desc *qdio_ssqd;
 	int retries = 3;
-	int mpno;
+	int mpno = 0;
 	int rc;
 
 	QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
@@ -3784,7 +3766,10 @@ int qeth_core_hardsetup_card(struct qeth_card *card)
 		QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 		return rc;
 	}
-	mpno = qdio_get_ssqd_pct(CARD_DDEV(card));
+
+	qdio_ssqd = qdio_get_ssqd_desc(CARD_DDEV(card));
+	if (qdio_ssqd)
+		mpno = qdio_ssqd->pcnt;
 	if (mpno)
 		mpno = min(mpno - 1, QETH_MAX_PORTNO);
 	if (card->info.portno > mpno) {

drivers/s390/net/qeth_l2_main.c

@@ -726,8 +726,7 @@ static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 }
 
 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
-			unsigned int status, unsigned int qdio_err,
-			unsigned int siga_err, unsigned int queue,
+			unsigned int qdio_err, unsigned int queue,
 			int first_element, int count, unsigned long card_ptr)
 {
 	struct net_device *net_dev;
@@ -742,23 +741,20 @@ static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 		card->perf_stats.inbound_cnt++;
 		card->perf_stats.inbound_start_time = qeth_get_micros();
 	}
-	if (status & QDIO_STATUS_LOOK_FOR_ERROR) {
-		if (status & QDIO_STATUS_ACTIVATE_CHECK_CONDITION) {
+	if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 		QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 		QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 		QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 				count);
-			QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", queue, status);
+		QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
 		qeth_schedule_recovery(card);
 		return;
 	}
-	}
 	for (i = first_element; i < (first_element + count); ++i) {
 		index = i % QDIO_MAX_BUFFERS_PER_Q;
 		buffer = &card->qdio.in_q->bufs[index];
-		if (!((status & QDIO_STATUS_LOOK_FOR_ERROR) &&
-		      qeth_check_qdio_errors(buffer->buffer,
-					     qdio_err, siga_err, "qinerr")))
+		if (!(qdio_err &&
+		      qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
 			qeth_l2_process_inbound_buffer(card, buffer, index);
 		/* clear buffer and give back to hardware */
 		qeth_put_buffer_pool_entry(card, buffer->pool_entry);

drivers/s390/net/qeth_l3_main.c

@@ -2939,8 +2939,7 @@ static int qeth_l3_setup_netdev(struct qeth_card *card)
 }
 
 static void qeth_l3_qdio_input_handler(struct ccw_device *ccwdev,
-		unsigned int status, unsigned int qdio_err,
-		unsigned int siga_err, unsigned int queue, int first_element,
+		unsigned int qdio_err, unsigned int queue, int first_element,
 		int count, unsigned long card_ptr)
 {
 	struct net_device *net_dev;
@@ -2955,23 +2954,21 @@ static void qeth_l3_qdio_input_handler(struct ccw_device *ccwdev,
 		card->perf_stats.inbound_cnt++;
 		card->perf_stats.inbound_start_time = qeth_get_micros();
 	}
-	if (status & QDIO_STATUS_LOOK_FOR_ERROR) {
-		if (status & QDIO_STATUS_ACTIVATE_CHECK_CONDITION) {
+	if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 		QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 		QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 		QETH_DBF_TEXT_(TRACE, 1, "%04X%04X",
 				first_element, count);
-			QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", queue, status);
+		QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
 		qeth_schedule_recovery(card);
 		return;
 	}
-	}
 	for (i = first_element; i < (first_element + count); ++i) {
 		index = i % QDIO_MAX_BUFFERS_PER_Q;
 		buffer = &card->qdio.in_q->bufs[index];
-		if (!((status & QDIO_STATUS_LOOK_FOR_ERROR) &&
+		if (!(qdio_err &&
 		      qeth_check_qdio_errors(buffer->buffer,
-					     qdio_err, siga_err, "qinerr")))
+					     qdio_err, "qinerr")))
 			qeth_l3_process_inbound_buffer(card, buffer, index);
 		/* clear buffer and give back to hardware */
 		qeth_put_buffer_pool_entry(card, buffer->pool_entry);

drivers/s390/scsi/zfcp_dbf.c

@@ -297,15 +297,13 @@ void zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
 /**
  * zfcp_hba_dbf_event_qdio - trace event for QDIO related failure
  * @adapter: adapter affected by this QDIO related event
- * @status: as passed by qdio module
  * @qdio_error: as passed by qdio module
- * @siga_error: as passed by qdio module
  * @sbal_index: first buffer with error condition, as passed by qdio module
  * @sbal_count: number of buffers affected, as passed by qdio module
  */
-void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status,
-			     unsigned int qdio_error, unsigned int siga_error,
-			     int sbal_index, int sbal_count)
+void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter,
+			     unsigned int qdio_error, int sbal_index,
+			     int sbal_count)
 {
 	struct zfcp_hba_dbf_record *r = &adapter->hba_dbf_buf;
 	unsigned long flags;
@@ -313,9 +311,7 @@ void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status,
 	spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 	memset(r, 0, sizeof(*r));
 	strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
-	r->u.qdio.status = status;
 	r->u.qdio.qdio_error = qdio_error;
-	r->u.qdio.siga_error = siga_error;
 	r->u.qdio.sbal_index = sbal_index;
 	r->u.qdio.sbal_count = sbal_count;
 	debug_event(adapter->hba_dbf, 0, r, sizeof(*r));
@@ -398,9 +394,7 @@ static void zfcp_hba_dbf_view_status(char **p,
 
 static void zfcp_hba_dbf_view_qdio(char **p, struct zfcp_hba_dbf_record_qdio *r)
 {
-	zfcp_dbf_out(p, "status", "0x%08x", r->status);
 	zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
-	zfcp_dbf_out(p, "siga_error", "0x%08x", r->siga_error);
 	zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
 	zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
 }

drivers/s390/scsi/zfcp_dbf.h

@@ -139,9 +139,7 @@ struct zfcp_hba_dbf_record_status {
 } __attribute__ ((packed));
 
 struct zfcp_hba_dbf_record_qdio {
-	u32 status;
 	u32 qdio_error;
-	u32 siga_error;
 	u8 sbal_index;
 	u8 sbal_count;
 } __attribute__ ((packed));

drivers/s390/scsi/zfcp_ext.h

@@ -48,9 +48,8 @@ extern void zfcp_rec_dbf_event_action(u8, struct zfcp_erp_action *);
 extern void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *);
 extern void zfcp_hba_dbf_event_fsf_unsol(const char *, struct zfcp_adapter *,
 					 struct fsf_status_read_buffer *);
-extern void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *,
-				    unsigned int, unsigned int, unsigned int,
-				    int, int);
+extern void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *, unsigned int, int,
+				    int);
 extern void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *);
 extern void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *);
 extern void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *);

drivers/s390/scsi/zfcp_qdio.c

@@ -74,17 +74,15 @@ static void zfcp_qdio_zero_sbals(struct qdio_buffer *sbal[], int first, int cnt)
 	}
 }
 
-static void zfcp_qdio_int_req(struct ccw_device *cdev, unsigned int status,
-			      unsigned int qdio_err, unsigned int siga_err,
-			      unsigned int queue_no, int first, int count,
+static void zfcp_qdio_int_req(struct ccw_device *cdev, unsigned int qdio_err,
+			      int queue_no, int first, int count,
 			      unsigned long parm)
 {
 	struct zfcp_adapter *adapter = (struct zfcp_adapter *) parm;
 	struct zfcp_qdio_queue *queue = &adapter->req_q;
 
-	if (unlikely(status & QDIO_STATUS_LOOK_FOR_ERROR)) {
-		zfcp_hba_dbf_event_qdio(adapter, status, qdio_err, siga_err,
-					first, count);
+	if (unlikely(qdio_err)) {
+		zfcp_hba_dbf_event_qdio(adapter, qdio_err, first, count);
 		zfcp_qdio_handler_error(adapter, 140);
 		return;
 	}
@@ -129,8 +127,7 @@ static void zfcp_qdio_resp_put_back(struct zfcp_adapter *adapter, int processed)
 
 	count = atomic_read(&queue->count) + processed;
 
-	retval = do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT | QDIO_FLAG_UNDER_INTERRUPT,
-			 0, start, count, NULL);
+	retval = do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT, 0, start, count);
 
 	if (unlikely(retval)) {
 		atomic_set(&queue->count, count);
@@ -142,9 +139,8 @@ static void zfcp_qdio_resp_put_back(struct zfcp_adapter *adapter, int processed)
 	}
 }
 
-static void zfcp_qdio_int_resp(struct ccw_device *cdev, unsigned int status,
-			       unsigned int qdio_err, unsigned int siga_err,
-			       unsigned int queue_no, int first, int count,
+static void zfcp_qdio_int_resp(struct ccw_device *cdev, unsigned int qdio_err,
+			       int queue_no, int first, int count,
 			       unsigned long parm)
 {
 	struct zfcp_adapter *adapter = (struct zfcp_adapter *) parm;
@@ -152,9 +148,8 @@ static void zfcp_qdio_int_resp(struct ccw_device *cdev, unsigned int status,
 	volatile struct qdio_buffer_element *sbale;
 	int sbal_idx, sbale_idx, sbal_no;
 
-	if (unlikely(status & QDIO_STATUS_LOOK_FOR_ERROR)) {
-		zfcp_hba_dbf_event_qdio(adapter, status, qdio_err, siga_err,
-					first, count);
+	if (unlikely(qdio_err)) {
+		zfcp_hba_dbf_event_qdio(adapter, qdio_err, first, count);
 		zfcp_qdio_handler_error(adapter, 147);
 		return;
 	}
@@ -362,7 +357,7 @@ int zfcp_qdio_send(struct zfcp_fsf_req *fsf_req)
 	}
 
 	retval = do_QDIO(adapter->ccw_device, QDIO_FLAG_SYNC_OUTPUT, 0, first,
-			 count, NULL);
+			 count);
 	if (unlikely(retval)) {
 		zfcp_qdio_zero_sbals(req_q->sbal, first, count);
 		return retval;
@@ -400,10 +395,6 @@ int zfcp_qdio_allocate(struct zfcp_adapter *adapter)
 	init_data->qib_param_field = NULL;
 	init_data->input_slib_elements = NULL;
 	init_data->output_slib_elements = NULL;
-	init_data->min_input_threshold = 1;
-	init_data->max_input_threshold = 5000;
-	init_data->min_output_threshold = 1;
-	init_data->max_output_threshold = 1000;
 	init_data->no_input_qs = 1;
 	init_data->no_output_qs = 1;
 	init_data->input_handler = zfcp_qdio_int_resp;
@@ -436,9 +427,7 @@ void zfcp_qdio_close(struct zfcp_adapter *adapter)
 	atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
 	spin_unlock(&req_q->lock);
 
-	while (qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR)
-			== -EINPROGRESS)
-		ssleep(1);
+	qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR);
 
 	/* cleanup used outbound sbals */
 	count = atomic_read(&req_q->count);
@@ -473,7 +462,7 @@ int zfcp_qdio_open(struct zfcp_adapter *adapter)
 		return -EIO;
 	}
 
-	if (qdio_activate(adapter->ccw_device, 0)) {
+	if (qdio_activate(adapter->ccw_device)) {
 		dev_err(&adapter->ccw_device->dev,
 			 "Activate of QDIO queues failed.\n");
 		goto failed_qdio;
@@ -487,7 +476,7 @@ int zfcp_qdio_open(struct zfcp_adapter *adapter)
 	}
 
 	if (do_QDIO(adapter->ccw_device, QDIO_FLAG_SYNC_INPUT, 0, 0,
-		     QDIO_MAX_BUFFERS_PER_Q, NULL)) {
+		     QDIO_MAX_BUFFERS_PER_Q)) {
 		dev_err(&adapter->ccw_device->dev,
 			 "Init of QDIO response queue failed.\n");
 		goto failed_qdio;
@@ -501,9 +490,6 @@ int zfcp_qdio_open(struct zfcp_adapter *adapter)
 	return 0;
 
 failed_qdio:
-	while (qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR)
-			== -EINPROGRESS)
-		ssleep(1);
-
+	qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR);
 	return -EIO;
 }

include/asm-s390/setup.h

@@ -65,6 +65,7 @@ extern unsigned long machine_flags;
 
 #define MACHINE_FLAG_VM		(1UL << 0)
 #define MACHINE_FLAG_IEEE	(1UL << 1)
+#define MACHINE_FLAG_P390	(1UL << 2)
 #define MACHINE_FLAG_CSP	(1UL << 3)
 #define MACHINE_FLAG_MVPG	(1UL << 4)
 #define MACHINE_FLAG_DIAG44	(1UL << 5)
@@ -77,7 +78,6 @@ extern unsigned long machine_flags;
 
 #define MACHINE_IS_VM		(machine_flags & MACHINE_FLAG_VM)
 #define MACHINE_IS_KVM		(machine_flags & MACHINE_FLAG_KVM)
-#define MACHINE_IS_P390		(machine_flags & MACHINE_FLAG_P390)
 #define MACHINE_HAS_DIAG9C	(machine_flags & MACHINE_FLAG_DIAG9C)
 
 #ifndef __s390x__