drivers/s390/cio/qdio_setup.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * qdio queue initialization
  *
  * Copyright IBM Corp. 2008
  * Author(s): Jan Glauber <jang@linux.vnet.ibm.com>
  */
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/export.h>
 #include <linux/io.h>

 #include <asm/ebcdic.h>
 #include <asm/qdio.h>

 #include "cio.h"
 #include "css.h"
 #include "device.h"
 #include "ioasm.h"
 #include "chsc.h"
 #include "qdio.h"
 #include "qdio_debug.h"

 #define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer))

 static struct kmem_cache *qdio_q_cache;

 /**
  * qdio_free_buffers() - free qdio buffers
  * @buf: array of pointers to qdio buffers
  * @count: number of qdio buffers to free
  */
 void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count)
 {
 	int pos;

 	for (pos = 0; pos < count; pos += QBUFF_PER_PAGE)
 		free_page((unsigned long) buf[pos]);
 }
 EXPORT_SYMBOL_GPL(qdio_free_buffers);

 /**
  * qdio_alloc_buffers() - allocate qdio buffers
  * @buf: array of pointers to qdio buffers
  * @count: number of qdio buffers to allocate
  */
 int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count)
 {
 	int pos;

 	for (pos = 0; pos < count; pos += QBUFF_PER_PAGE) {
 		buf[pos] = (void *) get_zeroed_page(GFP_KERNEL);
 		if (!buf[pos]) {
 			qdio_free_buffers(buf, count);
 			return -ENOMEM;
 		}
 	}
 	for (pos = 0; pos < count; pos++)
 		if (pos % QBUFF_PER_PAGE)
 			buf[pos] = buf[pos - 1] + 1;
 	return 0;
 }
 EXPORT_SYMBOL_GPL(qdio_alloc_buffers);

 /**
  * qdio_reset_buffers() - reset qdio buffers
  * @buf: array of pointers to qdio buffers
  * @count: number of qdio buffers that will be zeroed
  */
 void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count)
 {
 	int pos;

 	for (pos = 0; pos < count; pos++)
 		memset(buf[pos], 0, sizeof(struct qdio_buffer));
 }
 EXPORT_SYMBOL_GPL(qdio_reset_buffers);

 static void __qdio_free_queues(struct qdio_q **queues, unsigned int count)
 {
 	struct qdio_q *q;
 	unsigned int i;

 	for (i = 0; i < count; i++) {
 		q = queues[i];
 		free_page((unsigned long) q->slib);
 		kmem_cache_free(qdio_q_cache, q);
 	}
 }

 void qdio_free_queues(struct qdio_irq *irq_ptr)
 {
 	__qdio_free_queues(irq_ptr->input_qs, irq_ptr->max_input_qs);
 	irq_ptr->max_input_qs = 0;

 	__qdio_free_queues(irq_ptr->output_qs, irq_ptr->max_output_qs);
 	irq_ptr->max_output_qs = 0;
 }

 static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
 {
 	struct qdio_q *q;
 	int i;

 	for (i = 0; i < nr_queues; i++) {
 		q = kmem_cache_zalloc(qdio_q_cache, GFP_KERNEL);
 		if (!q) {
 			__qdio_free_queues(irq_ptr_qs, i);
 			return -ENOMEM;
 		}

 		q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
 		if (!q->slib) {
 			kmem_cache_free(qdio_q_cache, q);
 			__qdio_free_queues(irq_ptr_qs, i);
 			return -ENOMEM;
 		}
 		irq_ptr_qs[i] = q;
 	}
 	return 0;
 }

 int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs)
 {
 	int rc;

 	rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
 	if (rc)
 		return rc;

 	rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
 	if (rc) {
 		__qdio_free_queues(irq_ptr->input_qs, nr_input_qs);
 		return rc;
 	}

 	irq_ptr->max_input_qs = nr_input_qs;
 	irq_ptr->max_output_qs = nr_output_qs;
 	return 0;
 }

 static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr,
 			      qdio_handler_t *handler, int i)
 {
 	struct slib *slib = q->slib;

 	/* queue must be cleared for qdio_establish */
 	memset(q, 0, sizeof(*q));
 	memset(slib, 0, PAGE_SIZE);
 	q->slib = slib;
 	q->irq_ptr = irq_ptr;
 	q->mask = 1 << (31 - i);
 	q->nr = i;
 	q->handler = handler;
 }

 static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,
 				struct qdio_buffer **sbals_array, int i)
 {
 	struct qdio_q *prev;
 	int j;

 	DBF_HEX(&q, sizeof(void *));
 	q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2);

 	/* fill in sbal */
 	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
 		q->sbal[j] = *sbals_array++;

 	/* fill in slib */
 	if (i > 0) {
 		prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
 			: irq_ptr->output_qs[i - 1];
 		prev->slib->nsliba = (unsigned long)q->slib;
 	}

 	q->slib->sla = (unsigned long)q->sl;
 	q->slib->slsba = (unsigned long)&q->slsb.val[0];

 	/* fill in sl */
 	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
 		q->sl->element[j].sbal = virt_to_phys(q->sbal[j]);
 }

 static void setup_queues(struct qdio_irq *irq_ptr,
 			 struct qdio_initialize *qdio_init)
 {
 	struct qdio_q *q;
 	int i;

 	for_each_input_queue(irq_ptr, q, i) {
 		DBF_EVENT("inq:%1d", i);
 		setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);

 		q->is_input_q = 1;

 		setup_storage_lists(q, irq_ptr,
 				    qdio_init->input_sbal_addr_array[i], i);
 	}

 	for_each_output_queue(irq_ptr, q, i) {
 		DBF_EVENT("outq:%1d", i);
 		setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);

 		q->is_input_q = 0;
 		setup_storage_lists(q, irq_ptr,
 				    qdio_init->output_sbal_addr_array[i], i);
 	}
 }

 static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
 				  unsigned char qdioac, unsigned long token)
 {
 	if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM))
 		goto no_qebsm;
 	if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) ||
 	    (!(qdioac & AC1_SC_QEBSM_ENABLED)))
 		goto no_qebsm;

 	irq_ptr->sch_token = token;

 	DBF_EVENT("V=V:1");
 	DBF_EVENT("%8lx", irq_ptr->sch_token);
 	return;

 no_qebsm:
 	irq_ptr->sch_token = 0;
 	irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
 	DBF_EVENT("noV=V");
 }

 /*
  * If there is a qdio_irq we use the chsc_page and store the information
  * in the qdio_irq, otherwise we copy it to the specified structure.
  */
 int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
 			struct subchannel_id *schid,
 			struct qdio_ssqd_desc *data)
 {
 	struct chsc_ssqd_area *ssqd;
 	int rc;

 	DBF_EVENT("getssqd:%4x", schid->sch_no);
 	if (!irq_ptr) {
 		ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
 		if (!ssqd)
 			return -ENOMEM;
 	} else {
 		ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
 	}

 	rc = chsc_ssqd(*schid, ssqd);
 	if (rc)
 		goto out;

 	if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) ||
 	    !(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) ||
 	    (ssqd->qdio_ssqd.sch != schid->sch_no))
 		rc = -EINVAL;

 	if (!rc)
 		memcpy(data, &ssqd->qdio_ssqd, sizeof(*data));

 out:
 	if (!irq_ptr)
 		free_page((unsigned long)ssqd);

 	return rc;
 }

 void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
 {
 	unsigned char qdioac;
 	int rc;

 	rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, &irq_ptr->ssqd_desc);
 	if (rc) {
 		DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no);
 		DBF_ERROR("rc:%x", rc);
 		/* all flags set, worst case */
 		qdioac = AC1_SIGA_INPUT_NEEDED | AC1_SIGA_OUTPUT_NEEDED |
 			 AC1_SIGA_SYNC_NEEDED;
 	} else
 		qdioac = irq_ptr->ssqd_desc.qdioac1;

 	check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token);
 	irq_ptr->qdioac1 = qdioac;
 	DBF_EVENT("ac 1:%2x 2:%4x", qdioac, irq_ptr->ssqd_desc.qdioac2);
 	DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac);
 }

 static void qdio_fill_qdr_desc(struct qdesfmt0 *desc, struct qdio_q *queue)
 {
 	desc->sliba = virt_to_phys(queue->slib);
 	desc->sla = virt_to_phys(queue->sl);
 	desc->slsba = virt_to_phys(&queue->slsb);

 	desc->akey = PAGE_DEFAULT_KEY >> 4;
 	desc->bkey = PAGE_DEFAULT_KEY >> 4;
 	desc->ckey = PAGE_DEFAULT_KEY >> 4;
 	desc->dkey = PAGE_DEFAULT_KEY >> 4;
 }

 static void setup_qdr(struct qdio_irq *irq_ptr,
 		      struct qdio_initialize *qdio_init)
 {
 	struct qdesfmt0 *desc = &irq_ptr->qdr->qdf0[0];
 	int i;

 	memset(irq_ptr->qdr, 0, sizeof(struct qdr));

 	irq_ptr->qdr->qfmt = qdio_init->q_format;
 	irq_ptr->qdr->ac = qdio_init->qdr_ac;
 	irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
 	irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
 	irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */
 	irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
 	irq_ptr->qdr->qiba = virt_to_phys(&irq_ptr->qib);
 	irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4;

 	for (i = 0; i < qdio_init->no_input_qs; i++)
 		qdio_fill_qdr_desc(desc++, irq_ptr->input_qs[i]);

 	for (i = 0; i < qdio_init->no_output_qs; i++)
 		qdio_fill_qdr_desc(desc++, irq_ptr->output_qs[i]);
 }

 static void setup_qib(struct qdio_irq *irq_ptr,
 		      struct qdio_initialize *init_data)
 {
 	memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));

 	irq_ptr->qib.qfmt = init_data->q_format;
 	irq_ptr->qib.pfmt = init_data->qib_param_field_format;

 	irq_ptr->qib.rflags = init_data->qib_rflags;
 	if (css_general_characteristics.qebsm)
 		irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;

 	if (init_data->no_input_qs)
 		irq_ptr->qib.isliba =
 			(unsigned long)(irq_ptr->input_qs[0]->slib);
 	if (init_data->no_output_qs)
 		irq_ptr->qib.osliba =
 			(unsigned long)(irq_ptr->output_qs[0]->slib);
 	memcpy(irq_ptr->qib.ebcnam, dev_name(&irq_ptr->cdev->dev), 8);
 	ASCEBC(irq_ptr->qib.ebcnam, 8);

 	if (init_data->qib_param_field)
 		memcpy(irq_ptr->qib.parm, init_data->qib_param_field,
 		       sizeof(irq_ptr->qib.parm));
 }

 void qdio_setup_irq(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data)
 {
 	struct ccw_device *cdev = irq_ptr->cdev;

 	irq_ptr->qdioac1 = 0;
 	memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc));
 	memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));

 	irq_ptr->debugfs_dev = NULL;
 	irq_ptr->sch_token = irq_ptr->perf_stat_enabled = 0;
 	irq_ptr->state = QDIO_IRQ_STATE_INACTIVE;
 	irq_ptr->error_handler = init_data->input_handler;

 	irq_ptr->int_parm = init_data->int_parm;
 	irq_ptr->nr_input_qs = init_data->no_input_qs;
 	irq_ptr->nr_output_qs = init_data->no_output_qs;
 	ccw_device_get_schid(cdev, &irq_ptr->schid);
 	setup_queues(irq_ptr, init_data);

 	irq_ptr->irq_poll = init_data->irq_poll;
 	set_bit(QDIO_IRQ_DISABLED, &irq_ptr->poll_state);

 	setup_qib(irq_ptr, init_data);

 	/* fill input and output descriptors */
 	setup_qdr(irq_ptr, init_data);

 	/* qdr, qib, sls, slsbs, slibs, sbales are filled now */

 	/* set our IRQ handler */
 	spin_lock_irq(get_ccwdev_lock(cdev));
 	irq_ptr->orig_handler = cdev->handler;
 	cdev->handler = qdio_int_handler;
 	spin_unlock_irq(get_ccwdev_lock(cdev));
 }

 void qdio_shutdown_irq(struct qdio_irq *irq)
 {
 	struct ccw_device *cdev = irq->cdev;

 	/* restore IRQ handler */
 	spin_lock_irq(get_ccwdev_lock(cdev));
 	cdev->handler = irq->orig_handler;
 	cdev->private->intparm = 0;
 	spin_unlock_irq(get_ccwdev_lock(cdev));
 }

 void qdio_print_subchannel_info(struct qdio_irq *irq_ptr)
 {
 	dev_info(&irq_ptr->cdev->dev,
 		 "qdio: %s on SC %x using AI:%d QEBSM:%d PRI:%d TDD:%d SIGA:%s%s%s\n",
 		 (irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
 			((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
 		 irq_ptr->schid.sch_no,
 		 is_thinint_irq(irq_ptr),
 		 (irq_ptr->sch_token) ? 1 : 0,
 		 pci_out_supported(irq_ptr) ? 1 : 0,
 		 css_general_characteristics.aif_tdd,
 		 qdio_need_siga_in(irq_ptr) ? "R" : " ",
 		 qdio_need_siga_out(irq_ptr) ? "W" : " ",
 		 qdio_need_siga_sync(irq_ptr) ? "S" : " ");
 }

 int __init qdio_setup_init(void)
 {
 	qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
 					 256, 0, NULL);
 	if (!qdio_q_cache)
 		return -ENOMEM;

 	/* Check for OSA/FCP thin interrupts (bit 67). */
 	DBF_EVENT("thinint:%1d",
 		  (css_general_characteristics.aif_osa) ? 1 : 0);

 	/* Check for QEBSM support in general (bit 58). */
 	DBF_EVENT("cssQEBSM:%1d", css_general_characteristics.qebsm);

 	return 0;
 }

 void qdio_setup_exit(void)
 {
 	kmem_cache_destroy(qdio_q_cache);
 }
	// SPDX-License-Identifier: GPL-2.0
	/*
	* qdio queue initialization
	*
	* Copyright IBM Corp. 2008
	* Author(s): Jan Glauber <jang@linux.vnet.ibm.com>
	*/
	#include <linux/kernel.h>
	#include <linux/slab.h>
	#include <linux/export.h>
	#include <linux/io.h>

	#include <asm/ebcdic.h>
	#include <asm/qdio.h>

	#include "cio.h"
	#include "css.h"
	#include "device.h"
	#include "ioasm.h"
	#include "chsc.h"
	#include "qdio.h"
	#include "qdio_debug.h"

	#define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer))

	static struct kmem_cache *qdio_q_cache;

	/**
	* qdio_free_buffers() - free qdio buffers
	* @buf: array of pointers to qdio buffers
	* @count: number of qdio buffers to free
	*/
	void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count)
	{
	int pos;

	for (pos = 0; pos < count; pos += QBUFF_PER_PAGE)
	free_page((unsigned long) buf[pos]);
	}
	EXPORT_SYMBOL_GPL(qdio_free_buffers);

	/**
	* qdio_alloc_buffers() - allocate qdio buffers
	* @buf: array of pointers to qdio buffers
	* @count: number of qdio buffers to allocate
	*/
	int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count)
	{
	int pos;

	for (pos = 0; pos < count; pos += QBUFF_PER_PAGE) {
	buf[pos] = (void *) get_zeroed_page(GFP_KERNEL);
	if (!buf[pos]) {
	qdio_free_buffers(buf, count);
	return -ENOMEM;
	}
	}
	for (pos = 0; pos < count; pos++)
	if (pos % QBUFF_PER_PAGE)
	buf[pos] = buf[pos - 1] + 1;
	return 0;
	}
	EXPORT_SYMBOL_GPL(qdio_alloc_buffers);

	/**
	* qdio_reset_buffers() - reset qdio buffers
	* @buf: array of pointers to qdio buffers
	* @count: number of qdio buffers that will be zeroed
	*/
	void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count)
	{
	int pos;

	for (pos = 0; pos < count; pos++)
	memset(buf[pos], 0, sizeof(struct qdio_buffer));
	}
	EXPORT_SYMBOL_GPL(qdio_reset_buffers);

	static void __qdio_free_queues(struct qdio_q **queues, unsigned int count)
	{
	struct qdio_q *q;
	unsigned int i;

	for (i = 0; i < count; i++) {
	q = queues[i];
	free_page((unsigned long) q->slib);
	kmem_cache_free(qdio_q_cache, q);
	}
	}

	void qdio_free_queues(struct qdio_irq *irq_ptr)
	{
	__qdio_free_queues(irq_ptr->input_qs, irq_ptr->max_input_qs);
	irq_ptr->max_input_qs = 0;

	__qdio_free_queues(irq_ptr->output_qs, irq_ptr->max_output_qs);
	irq_ptr->max_output_qs = 0;
	}

	static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
	{
	struct qdio_q *q;
	int i;

	for (i = 0; i < nr_queues; i++) {
	q = kmem_cache_zalloc(qdio_q_cache, GFP_KERNEL);
	if (!q) {
	__qdio_free_queues(irq_ptr_qs, i);
	return -ENOMEM;
	}

	q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
	if (!q->slib) {
	kmem_cache_free(qdio_q_cache, q);
	__qdio_free_queues(irq_ptr_qs, i);
	return -ENOMEM;
	}
	irq_ptr_qs[i] = q;
	}
	return 0;
	}

	int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs)
	{
	int rc;

	rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
	if (rc)
	return rc;

	rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
	if (rc) {
	__qdio_free_queues(irq_ptr->input_qs, nr_input_qs);
	return rc;
	}

	irq_ptr->max_input_qs = nr_input_qs;
	irq_ptr->max_output_qs = nr_output_qs;
	return 0;
	}

	static void setup_queues_misc(struct qdio_q q, struct qdio_irq irq_ptr,
	qdio_handler_t *handler, int i)
	{
	struct slib *slib = q->slib;

	/* queue must be cleared for qdio_establish */
	memset(q, 0, sizeof(*q));
	memset(slib, 0, PAGE_SIZE);
	q->slib = slib;
	q->irq_ptr = irq_ptr;
	q->mask = 1 << (31 - i);
	q->nr = i;
	q->handler = handler;
	}

	static void setup_storage_lists(struct qdio_q q, struct qdio_irq irq_ptr,
	struct qdio_buffer **sbals_array, int i)
	{
	struct qdio_q *prev;
	int j;

	DBF_HEX(&q, sizeof(void *));
	q->sl = (struct sl )((char )q->slib + PAGE_SIZE / 2);

	/* fill in sbal */
	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
	q->sbal[j] = *sbals_array++;

	/* fill in slib */
	if (i > 0) {
	prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
	: irq_ptr->output_qs[i - 1];
	prev->slib->nsliba = (unsigned long)q->slib;
	}

	q->slib->sla = (unsigned long)q->sl;
	q->slib->slsba = (unsigned long)&q->slsb.val[0];

	/* fill in sl */
	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
	q->sl->element[j].sbal = virt_to_phys(q->sbal[j]);
	}

	static void setup_queues(struct qdio_irq *irq_ptr,
	struct qdio_initialize *qdio_init)
	{
	struct qdio_q *q;
	int i;

	for_each_input_queue(irq_ptr, q, i) {
	DBF_EVENT("inq:%1d", i);
	setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);

	q->is_input_q = 1;

	setup_storage_lists(q, irq_ptr,
	qdio_init->input_sbal_addr_array[i], i);
	}

	for_each_output_queue(irq_ptr, q, i) {
	DBF_EVENT("outq:%1d", i);
	setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);

	q->is_input_q = 0;
	setup_storage_lists(q, irq_ptr,
	qdio_init->output_sbal_addr_array[i], i);
	}
	}

	static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
	unsigned char qdioac, unsigned long token)
	{
	if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM))
	goto no_qebsm;
	if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) \|\|
	(!(qdioac & AC1_SC_QEBSM_ENABLED)))
	goto no_qebsm;

	irq_ptr->sch_token = token;

	DBF_EVENT("V=V:1");
	DBF_EVENT("%8lx", irq_ptr->sch_token);
	return;

	no_qebsm:
	irq_ptr->sch_token = 0;
	irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
	DBF_EVENT("noV=V");
	}

	/*
	* If there is a qdio_irq we use the chsc_page and store the information
	* in the qdio_irq, otherwise we copy it to the specified structure.
	*/
	int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
	struct subchannel_id *schid,
	struct qdio_ssqd_desc *data)
	{
	struct chsc_ssqd_area *ssqd;
	int rc;

	DBF_EVENT("getssqd:%4x", schid->sch_no);
	if (!irq_ptr) {
	ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
	if (!ssqd)
	return -ENOMEM;
	} else {
	ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
	}

	rc = chsc_ssqd(*schid, ssqd);
	if (rc)
	goto out;

	if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) \|\|
	!(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) \|\|
	(ssqd->qdio_ssqd.sch != schid->sch_no))
	rc = -EINVAL;

	if (!rc)
	memcpy(data, &ssqd->qdio_ssqd, sizeof(*data));

	out:
	if (!irq_ptr)
	free_page((unsigned long)ssqd);

	return rc;
	}

	void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
	{
	unsigned char qdioac;
	int rc;

	rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, &irq_ptr->ssqd_desc);
	if (rc) {
	DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no);
	DBF_ERROR("rc:%x", rc);
	/* all flags set, worst case */
	qdioac = AC1_SIGA_INPUT_NEEDED \| AC1_SIGA_OUTPUT_NEEDED \|
	AC1_SIGA_SYNC_NEEDED;
	} else
	qdioac = irq_ptr->ssqd_desc.qdioac1;

	check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token);
	irq_ptr->qdioac1 = qdioac;
	DBF_EVENT("ac 1:%2x 2:%4x", qdioac, irq_ptr->ssqd_desc.qdioac2);
	DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac);
	}

	static void qdio_fill_qdr_desc(struct qdesfmt0 desc, struct qdio_q queue)
	{
	desc->sliba = virt_to_phys(queue->slib);
	desc->sla = virt_to_phys(queue->sl);
	desc->slsba = virt_to_phys(&queue->slsb);

	desc->akey = PAGE_DEFAULT_KEY >> 4;
	desc->bkey = PAGE_DEFAULT_KEY >> 4;
	desc->ckey = PAGE_DEFAULT_KEY >> 4;
	desc->dkey = PAGE_DEFAULT_KEY >> 4;
	}

	static void setup_qdr(struct qdio_irq *irq_ptr,
	struct qdio_initialize *qdio_init)
	{
	struct qdesfmt0 *desc = &irq_ptr->qdr->qdf0[0];
	int i;

	memset(irq_ptr->qdr, 0, sizeof(struct qdr));

	irq_ptr->qdr->qfmt = qdio_init->q_format;
	irq_ptr->qdr->ac = qdio_init->qdr_ac;
	irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
	irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
	irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */
	irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
	irq_ptr->qdr->qiba = virt_to_phys(&irq_ptr->qib);
	irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4;

	for (i = 0; i < qdio_init->no_input_qs; i++)
	qdio_fill_qdr_desc(desc++, irq_ptr->input_qs[i]);

	for (i = 0; i < qdio_init->no_output_qs; i++)
	qdio_fill_qdr_desc(desc++, irq_ptr->output_qs[i]);
	}

	static void setup_qib(struct qdio_irq *irq_ptr,
	struct qdio_initialize *init_data)
	{
	memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));

	irq_ptr->qib.qfmt = init_data->q_format;
	irq_ptr->qib.pfmt = init_data->qib_param_field_format;

	irq_ptr->qib.rflags = init_data->qib_rflags;
	if (css_general_characteristics.qebsm)
	irq_ptr->qib.rflags \|= QIB_RFLAGS_ENABLE_QEBSM;

	if (init_data->no_input_qs)
	irq_ptr->qib.isliba =
	(unsigned long)(irq_ptr->input_qs[0]->slib);
	if (init_data->no_output_qs)
	irq_ptr->qib.osliba =
	(unsigned long)(irq_ptr->output_qs[0]->slib);
	memcpy(irq_ptr->qib.ebcnam, dev_name(&irq_ptr->cdev->dev), 8);
	ASCEBC(irq_ptr->qib.ebcnam, 8);

	if (init_data->qib_param_field)
	memcpy(irq_ptr->qib.parm, init_data->qib_param_field,
	sizeof(irq_ptr->qib.parm));
	}

	void qdio_setup_irq(struct qdio_irq irq_ptr, struct qdio_initialize init_data)
	{
	struct ccw_device *cdev = irq_ptr->cdev;

	irq_ptr->qdioac1 = 0;
	memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc));
	memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));

	irq_ptr->debugfs_dev = NULL;
	irq_ptr->sch_token = irq_ptr->perf_stat_enabled = 0;
	irq_ptr->state = QDIO_IRQ_STATE_INACTIVE;
	irq_ptr->error_handler = init_data->input_handler;

	irq_ptr->int_parm = init_data->int_parm;
	irq_ptr->nr_input_qs = init_data->no_input_qs;
	irq_ptr->nr_output_qs = init_data->no_output_qs;
	ccw_device_get_schid(cdev, &irq_ptr->schid);
	setup_queues(irq_ptr, init_data);

	irq_ptr->irq_poll = init_data->irq_poll;
	set_bit(QDIO_IRQ_DISABLED, &irq_ptr->poll_state);

	setup_qib(irq_ptr, init_data);

	/* fill input and output descriptors */
	setup_qdr(irq_ptr, init_data);

	/* qdr, qib, sls, slsbs, slibs, sbales are filled now */

	/* set our IRQ handler */
	spin_lock_irq(get_ccwdev_lock(cdev));
	irq_ptr->orig_handler = cdev->handler;
	cdev->handler = qdio_int_handler;
	spin_unlock_irq(get_ccwdev_lock(cdev));
	}

	void qdio_shutdown_irq(struct qdio_irq *irq)
	{
	struct ccw_device *cdev = irq->cdev;

	/* restore IRQ handler */
	spin_lock_irq(get_ccwdev_lock(cdev));
	cdev->handler = irq->orig_handler;
	cdev->private->intparm = 0;
	spin_unlock_irq(get_ccwdev_lock(cdev));
	}

	void qdio_print_subchannel_info(struct qdio_irq *irq_ptr)
	{
	dev_info(&irq_ptr->cdev->dev,
	"qdio: %s on SC %x using AI:%d QEBSM:%d PRI:%d TDD:%d SIGA:%s%s%s\n",
	(irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
	((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
	irq_ptr->schid.sch_no,
	is_thinint_irq(irq_ptr),
	(irq_ptr->sch_token) ? 1 : 0,
	pci_out_supported(irq_ptr) ? 1 : 0,
	css_general_characteristics.aif_tdd,
	qdio_need_siga_in(irq_ptr) ? "R" : " ",
	qdio_need_siga_out(irq_ptr) ? "W" : " ",
	qdio_need_siga_sync(irq_ptr) ? "S" : " ");
	}

	int __init qdio_setup_init(void)
	{
	qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
	256, 0, NULL);
	if (!qdio_q_cache)
	return -ENOMEM;

	/* Check for OSA/FCP thin interrupts (bit 67). */
	DBF_EVENT("thinint:%1d",
	(css_general_characteristics.aif_osa) ? 1 : 0);

	/* Check for QEBSM support in general (bit 58). */
	DBF_EVENT("cssQEBSM:%1d", css_general_characteristics.qebsm);

	return 0;
	}

	void qdio_setup_exit(void)
	{
	kmem_cache_destroy(qdio_q_cache);
	}