[linux-block.git] / drivers / s390 / cio / qdio_setup.c

// 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);
}
Commit	Line	Data
724117b7	1	// SPDX-License-Identifier: GPL-2.0
779e6e1c	2	/*
779e6e1c JG	3	* qdio queue initialization
779e6e1c JG	4	*
a53c8fab	5	* Copyright IBM Corp. 2008
779e6e1c JG	6	* Author(s): Jan Glauber <jang@linux.vnet.ibm.com>
	7	*/
	8	#include <linux/kernel.h>
	9	#include <linux/slab.h>
3a4c5d59	10	#include <linux/export.h>
e9091ffd	11	#include <linux/io.h>
180a4c42 JW	12
180a4c42 JW	13	#include <asm/ebcdic.h>
779e6e1c JG	14	#include <asm/qdio.h>
	15
	16	#include "cio.h"
	17	#include "css.h"
	18	#include "device.h"
	19	#include "ioasm.h"
	20	#include "chsc.h"
	21	#include "qdio.h"
	22	#include "qdio_debug.h"
	23
5245c924 SO	24	#define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer))
5245c924 SO	25
779e6e1c JG	26	static struct kmem_cache *qdio_q_cache;
779e6e1c JG	27
5245c924 SO	28	/**
	29	* qdio_free_buffers() - free qdio buffers
	30	* @buf: array of pointers to qdio buffers
	31	* @count: number of qdio buffers to free
	32	*/
	33	void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count)
	34	{
	35	int pos;
	36
	37	for (pos = 0; pos < count; pos += QBUFF_PER_PAGE)
	38	free_page((unsigned long) buf[pos]);
	39	}
	40	EXPORT_SYMBOL_GPL(qdio_free_buffers);
	41
	42	/**
	43	* qdio_alloc_buffers() - allocate qdio buffers
	44	* @buf: array of pointers to qdio buffers
	45	* @count: number of qdio buffers to allocate
	46	*/
	47	int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count)
	48	{
	49	int pos;
	50
	51	for (pos = 0; pos < count; pos += QBUFF_PER_PAGE) {
	52	buf[pos] = (void *) get_zeroed_page(GFP_KERNEL);
	53	if (!buf[pos]) {
	54	qdio_free_buffers(buf, count);
	55	return -ENOMEM;
	56	}
	57	}
	58	for (pos = 0; pos < count; pos++)
	59	if (pos % QBUFF_PER_PAGE)
	60	buf[pos] = buf[pos - 1] + 1;
	61	return 0;
	62	}
	63	EXPORT_SYMBOL_GPL(qdio_alloc_buffers);
	64
	65	/**
	66	* qdio_reset_buffers() - reset qdio buffers
	67	* @buf: array of pointers to qdio buffers
	68	* @count: number of qdio buffers that will be zeroed
	69	*/
	70	void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count)
	71	{
	72	int pos;
	73
	74	for (pos = 0; pos < count; pos++)
	75	memset(buf[pos], 0, sizeof(struct qdio_buffer));
	76	}
	77	EXPORT_SYMBOL_GPL(qdio_reset_buffers);
	78
2a7cf35c JW	79	static void __qdio_free_queues(struct qdio_q **queues, unsigned int count)
	80	{
	81	struct qdio_q *q;
	82	unsigned int i;
	83
	84	for (i = 0; i < count; i++) {
	85	q = queues[i];
	86	free_page((unsigned long) q->slib);
	87	kmem_cache_free(qdio_q_cache, q);
	88	}
	89	}
	90
d188cac3 JW	91	void qdio_free_queues(struct qdio_irq *irq_ptr)
	92	{
	93	__qdio_free_queues(irq_ptr->input_qs, irq_ptr->max_input_qs);
	94	irq_ptr->max_input_qs = 0;
	95
	96	__qdio_free_queues(irq_ptr->output_qs, irq_ptr->max_output_qs);
	97	irq_ptr->max_output_qs = 0;
	98	}
	99
779e6e1c JG	100	static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
	101	{
	102	struct qdio_q *q;
	103	int i;
	104
	105	for (i = 0; i < nr_queues; i++) {
e5218134	106	q = kmem_cache_zalloc(qdio_q_cache, GFP_KERNEL);
2a7cf35c JW	107	if (!q) {
2a7cf35c JW	108	__qdio_free_queues(irq_ptr_qs, i);
779e6e1c	109	return -ENOMEM;
2a7cf35c	110	}
779e6e1c JG	111
	112	q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
	113	if (!q->slib) {
	114	kmem_cache_free(qdio_q_cache, q);
2a7cf35c	115	__qdio_free_queues(irq_ptr_qs, i);
779e6e1c JG	116	return -ENOMEM;
779e6e1c JG	117	}
779e6e1c JG	118	irq_ptr_qs[i] = q;
	119	}
	120	return 0;
	121	}
	122
	123	int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs)
	124	{
	125	int rc;
	126
	127	rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
	128	if (rc)
	129	return rc;
2a7cf35c	130
779e6e1c	131	rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
d188cac3	132	if (rc) {
2a7cf35c	133	__qdio_free_queues(irq_ptr->input_qs, nr_input_qs);
d188cac3 JW	134	return rc;
d188cac3 JW	135	}
2a7cf35c	136
d188cac3 JW	137	irq_ptr->max_input_qs = nr_input_qs;
	138	irq_ptr->max_output_qs = nr_output_qs;
	139	return 0;
779e6e1c JG	140	}
	141
	142	static void setup_queues_misc(struct qdio_q q, struct qdio_irq irq_ptr,
	143	qdio_handler_t *handler, int i)
	144	{
5382fe11	145	struct slib *slib = q->slib;
779e6e1c	146
5382fe11 JG	147	/* queue must be cleared for qdio_establish */
	148	memset(q, 0, sizeof(*q));
	149	memset(slib, 0, PAGE_SIZE);
	150	q->slib = slib;
779e6e1c JG	151	q->irq_ptr = irq_ptr;
	152	q->mask = 1 << (31 - i);
	153	q->nr = i;
	154	q->handler = handler;
	155	}
	156
	157	static void setup_storage_lists(struct qdio_q q, struct qdio_irq irq_ptr,
bdf11767	158	struct qdio_buffer **sbals_array, int i)
779e6e1c JG	159	{
	160	struct qdio_q *prev;
	161	int j;
	162
22f99347	163	DBF_HEX(&q, sizeof(void *));
779e6e1c JG	164	q->sl = (struct sl )((char )q->slib + PAGE_SIZE / 2);
	165
	166	/* fill in sbal */
ce1d8014	167	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
779e6e1c	168	q->sbal[j] = *sbals_array++;
779e6e1c JG	169
	170	/* fill in slib */
	171	if (i > 0) {
	172	prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
	173	: irq_ptr->output_qs[i - 1];
	174	prev->slib->nsliba = (unsigned long)q->slib;
	175	}
	176
	177	q->slib->sla = (unsigned long)q->sl;
	178	q->slib->slsba = (unsigned long)&q->slsb.val[0];
	179
	180	/* fill in sl */
	181	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
e9091ffd	182	q->sl->element[j].sbal = virt_to_phys(q->sbal[j]);
779e6e1c JG	183	}
	184
	185	static void setup_queues(struct qdio_irq *irq_ptr,
	186	struct qdio_initialize *qdio_init)
	187	{
779e6e1c	188	struct qdio_q *q;
779e6e1c JG	189	int i;
779e6e1c JG	190
779e6e1c	191	for_each_input_queue(irq_ptr, q, i) {
104ea556	192	DBF_EVENT("inq:%1d", i);
779e6e1c JG	193	setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);
	194
	195	q->is_input_q = 1;
104ea556	196
d8564e19 JW	197	setup_storage_lists(q, irq_ptr,
d8564e19 JW	198	qdio_init->input_sbal_addr_array[i], i);
779e6e1c JG	199	}
	200
	201	for_each_output_queue(irq_ptr, q, i) {
22f99347	202	DBF_EVENT("outq:%1d", i);
779e6e1c JG	203	setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);
	204
	205	q->is_input_q = 0;
d8564e19 JW	206	setup_storage_lists(q, irq_ptr,
d8564e19 JW	207	qdio_init->output_sbal_addr_array[i], i);
779e6e1c JG	208	}
	209	}
	210
779e6e1c JG	211	static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
	212	unsigned char qdioac, unsigned long token)
	213	{
779e6e1c JG	214	if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM))
	215	goto no_qebsm;
	216	if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) \|\|
	217	(!(qdioac & AC1_SC_QEBSM_ENABLED)))
	218	goto no_qebsm;
	219
	220	irq_ptr->sch_token = token;
	221
22f99347 JG	222	DBF_EVENT("V=V:1");
22f99347 JG	223	DBF_EVENT("%8lx", irq_ptr->sch_token);
779e6e1c JG	224	return;
	225
	226	no_qebsm:
	227	irq_ptr->sch_token = 0;
	228	irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
22f99347	229	DBF_EVENT("noV=V");
779e6e1c JG	230	}
779e6e1c JG	231
bbd50e17 JG	232	/*
	233	* If there is a qdio_irq we use the chsc_page and store the information
	234	* in the qdio_irq, otherwise we copy it to the specified structure.
	235	*/
	236	int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
	237	struct subchannel_id *schid,
	238	struct qdio_ssqd_desc *data)
779e6e1c JG	239	{
	240	struct chsc_ssqd_area *ssqd;
	241	int rc;
	242
22f99347	243	DBF_EVENT("getssqd:%4x", schid->sch_no);
da5b6cb1	244	if (!irq_ptr) {
bbd50e17	245	ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
da5b6cb1 SO	246	if (!ssqd)
	247	return -ENOMEM;
	248	} else {
	249	ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
	250	}
	251
	252	rc = chsc_ssqd(*schid, ssqd);
779e6e1c	253	if (rc)
da5b6cb1	254	goto out;
779e6e1c JG	255
	256	if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) \|\|
	257	!(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) \|\|
bbd50e17	258	(ssqd->qdio_ssqd.sch != schid->sch_no))
da5b6cb1 SO	259	rc = -EINVAL;
	260
	261	if (!rc)
	262	memcpy(data, &ssqd->qdio_ssqd, sizeof(*data));
	263
	264	out:
	265	if (!irq_ptr)
bbd50e17	266	free_page((unsigned long)ssqd);
da5b6cb1 SO	267
da5b6cb1 SO	268	return rc;
779e6e1c JG	269	}
	270
	271	void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
	272	{
	273	unsigned char qdioac;
779e6e1c JG	274	int rc;
779e6e1c JG	275
da5b6cb1	276	rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, &irq_ptr->ssqd_desc);
779e6e1c	277	if (rc) {
22f99347 JG	278	DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no);
22f99347 JG	279	DBF_ERROR("rc:%x", rc);
779e6e1c JG	280	/* all flags set, worst case */
	281	qdioac = AC1_SIGA_INPUT_NEEDED \| AC1_SIGA_OUTPUT_NEEDED \|
	282	AC1_SIGA_SYNC_NEEDED;
	283	} else
	284	qdioac = irq_ptr->ssqd_desc.qdioac1;
	285
	286	check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token);
10376b53	287	irq_ptr->qdioac1 = qdioac;
61d84979 JG	288	DBF_EVENT("ac 1:%2x 2:%4x", qdioac, irq_ptr->ssqd_desc.qdioac2);
61d84979 JG	289	DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac);
779e6e1c JG	290	}
779e6e1c JG	291
4d4a3caa	292	static void qdio_fill_qdr_desc(struct qdesfmt0 desc, struct qdio_q queue)
779e6e1c	293	{
4d4a3caa JW	294	desc->sliba = virt_to_phys(queue->slib);
	295	desc->sla = virt_to_phys(queue->sl);
	296	desc->slsba = virt_to_phys(&queue->slsb);
	297
	298	desc->akey = PAGE_DEFAULT_KEY >> 4;
	299	desc->bkey = PAGE_DEFAULT_KEY >> 4;
	300	desc->ckey = PAGE_DEFAULT_KEY >> 4;
	301	desc->dkey = PAGE_DEFAULT_KEY >> 4;
779e6e1c JG	302	}
	303
	304	static void setup_qdr(struct qdio_irq *irq_ptr,
	305	struct qdio_initialize *qdio_init)
	306	{
4d4a3caa	307	struct qdesfmt0 *desc = &irq_ptr->qdr->qdf0[0];
779e6e1c JG	308	int i;
779e6e1c JG	309
44d9a21a JW	310	memset(irq_ptr->qdr, 0, sizeof(struct qdr));
44d9a21a JW	311
779e6e1c	312	irq_ptr->qdr->qfmt = qdio_init->q_format;
dfe5bb50	313	irq_ptr->qdr->ac = qdio_init->qdr_ac;
779e6e1c JG	314	irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
	315	irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
	316	irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */
	317	irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
4d4a3caa	318	irq_ptr->qdr->qiba = virt_to_phys(&irq_ptr->qib);
d1bf8590	319	irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4;
779e6e1c JG	320
779e6e1c JG	321	for (i = 0; i < qdio_init->no_input_qs; i++)
4d4a3caa	322	qdio_fill_qdr_desc(desc++, irq_ptr->input_qs[i]);
779e6e1c JG	323
779e6e1c JG	324	for (i = 0; i < qdio_init->no_output_qs; i++)
4d4a3caa	325	qdio_fill_qdr_desc(desc++, irq_ptr->output_qs[i]);
779e6e1c JG	326	}
	327
	328	static void setup_qib(struct qdio_irq *irq_ptr,
	329	struct qdio_initialize *init_data)
	330	{
44d9a21a	331	memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
dcc18f48	332
779e6e1c	333	irq_ptr->qib.qfmt = init_data->q_format;
44d9a21a JW	334	irq_ptr->qib.pfmt = init_data->qib_param_field_format;
	335
	336	irq_ptr->qib.rflags = init_data->qib_rflags;
	337	if (css_general_characteristics.qebsm)
	338	irq_ptr->qib.rflags \|= QIB_RFLAGS_ENABLE_QEBSM;
	339
779e6e1c JG	340	if (init_data->no_input_qs)
	341	irq_ptr->qib.isliba =
	342	(unsigned long)(irq_ptr->input_qs[0]->slib);
	343	if (init_data->no_output_qs)
	344	irq_ptr->qib.osliba =
	345	(unsigned long)(irq_ptr->output_qs[0]->slib);
180a4c42 JW	346	memcpy(irq_ptr->qib.ebcnam, dev_name(&irq_ptr->cdev->dev), 8);
180a4c42 JW	347	ASCEBC(irq_ptr->qib.ebcnam, 8);
44d9a21a JW	348
	349	if (init_data->qib_param_field)
	350	memcpy(irq_ptr->qib.parm, init_data->qib_param_field,
	351	sizeof(irq_ptr->qib.parm));
779e6e1c JG	352	}
779e6e1c JG	353
bd3a025d	354	void qdio_setup_irq(struct qdio_irq irq_ptr, struct qdio_initialize init_data)
779e6e1c	355	{
b2745655	356	struct ccw_device *cdev = irq_ptr->cdev;
779e6e1c	357
10376b53	358	irq_ptr->qdioac1 = 0;
432ac5e0 JG	359	memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc));
	360	memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
	361
d5d006fa	362	irq_ptr->debugfs_dev = NULL;
6e2a7b51 JW	363	irq_ptr->sch_token = irq_ptr->perf_stat_enabled = 0;
6e2a7b51 JW	364	irq_ptr->state = QDIO_IRQ_STATE_INACTIVE;
513251fe	365	irq_ptr->error_handler = init_data->input_handler;
432ac5e0	366
779e6e1c JG	367	irq_ptr->int_parm = init_data->int_parm;
	368	irq_ptr->nr_input_qs = init_data->no_input_qs;
	369	irq_ptr->nr_output_qs = init_data->no_output_qs;
dd62abd2	370	ccw_device_get_schid(cdev, &irq_ptr->schid);
779e6e1c JG	371	setup_queues(irq_ptr, init_data);
779e6e1c JG	372
1ecbcfd5 JW	373	irq_ptr->irq_poll = init_data->irq_poll;
1ecbcfd5 JW	374	set_bit(QDIO_IRQ_DISABLED, &irq_ptr->poll_state);
0a6e6345	375
779e6e1c	376	setup_qib(irq_ptr, init_data);
779e6e1c JG	377
	378	/* fill input and output descriptors */
	379	setup_qdr(irq_ptr, init_data);
	380
	381	/* qdr, qib, sls, slsbs, slibs, sbales are filled now */
	382
7b942b4b JW	383	/* set our IRQ handler */
	384	spin_lock_irq(get_ccwdev_lock(cdev));
	385	irq_ptr->orig_handler = cdev->handler;
	386	cdev->handler = qdio_int_handler;
	387	spin_unlock_irq(get_ccwdev_lock(cdev));
7b942b4b JW	388	}
	389
	390	void qdio_shutdown_irq(struct qdio_irq *irq)
	391	{
	392	struct ccw_device *cdev = irq->cdev;
	393
	394	/* restore IRQ handler */
dd62abd2	395	spin_lock_irq(get_ccwdev_lock(cdev));
7b942b4b JW	396	cdev->handler = irq->orig_handler;
7b942b4b JW	397	cdev->private->intparm = 0;
dd62abd2	398	spin_unlock_irq(get_ccwdev_lock(cdev));
779e6e1c JG	399	}
779e6e1c JG	400
b2745655	401	void qdio_print_subchannel_info(struct qdio_irq *irq_ptr)
779e6e1c	402	{
f86991b3 JW	403	dev_info(&irq_ptr->cdev->dev,
f86991b3 JW	404	"qdio: %s on SC %x using AI:%d QEBSM:%d PRI:%d TDD:%d SIGA:%s%s%s\n",
22f99347 JG	405	(irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
	406	((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
	407	irq_ptr->schid.sch_no,
	408	is_thinint_irq(irq_ptr),
	409	(irq_ptr->sch_token) ? 1 : 0,
f85b2b29	410	pci_out_supported(irq_ptr) ? 1 : 0,
22f99347	411	css_general_characteristics.aif_tdd,
10376b53 JW	412	qdio_need_siga_in(irq_ptr) ? "R" : " ",
	413	qdio_need_siga_out(irq_ptr) ? "W" : " ",
	414	qdio_need_siga_sync(irq_ptr) ? "S" : " ");
779e6e1c JG	415	}
	416
	417	int __init qdio_setup_init(void)
	418	{
779e6e1c JG	419	qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
	420	256, 0, NULL);
	421	if (!qdio_q_cache)
	422	return -ENOMEM;
	423
	424	/* Check for OSA/FCP thin interrupts (bit 67). */
22f99347 JG	425	DBF_EVENT("thinint:%1d",
22f99347 JG	426	(css_general_characteristics.aif_osa) ? 1 : 0);
779e6e1c JG	427
779e6e1c JG	428	/* Check for QEBSM support in general (bit 58). */
44d9a21a	429	DBF_EVENT("cssQEBSM:%1d", css_general_characteristics.qebsm);
a18c28f0 JW	430
a18c28f0 JW	431	return 0;
779e6e1c JG	432	}
779e6e1c JG	433
3f1934bc	434	void qdio_setup_exit(void)
779e6e1c JG	435	{
	436	kmem_cache_destroy(qdio_q_cache);
	437	}