[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;
static struct kmem_cache *qdio_aob_cache;

struct qaob *qdio_allocate_aob(void)
{
	return kmem_cache_zalloc(qdio_aob_cache, GFP_ATOMIC);
}
EXPORT_SYMBOL_GPL(qdio_allocate_aob);

void qdio_release_aob(struct qaob *aob)
{
	kmem_cache_free(qdio_aob_cache, aob);
}
EXPORT_SYMBOL_GPL(qdio_release_aob);

/**
 * 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);

/*
 * qebsm is only available under 64bit but the adapter sets the feature
 * flag anyway, so we manually override it.
 */
static inline int qebsm_possible(void)
{
	return css_general_characteristics.qebsm;
}

/*
 * qib_param_field: pointer to 128 bytes or NULL, if no param field
 * nr_input_qs: pointer to nr_queues*128 words of data or NULL
 */
static void set_impl_params(struct qdio_irq *irq_ptr,
			    unsigned int qib_param_field_format,
			    unsigned char *qib_param_field,
			    unsigned long *input_slib_elements,
			    unsigned long *output_slib_elements)
{
	struct qdio_q *q;
	int i, j;

	if (!irq_ptr)
		return;

	irq_ptr->qib.pfmt = qib_param_field_format;
	if (qib_param_field)
		memcpy(irq_ptr->qib.parm, qib_param_field,
		       sizeof(irq_ptr->qib.parm));

	if (!input_slib_elements)
		goto output;

	for_each_input_queue(irq_ptr, q, i) {
		for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
			q->slib->slibe[j].parms =
				input_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
	}
output:
	if (!output_slib_elements)
		return;

	for_each_output_queue(irq_ptr, q, i) {
		for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
			q->slib->slibe[j].parms =
				output_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
	}
}

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;

	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)
{
	if (qebsm_possible())
		irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;

	irq_ptr->qib.rflags |= init_data->qib_rflags;

	irq_ptr->qib.qfmt = init_data->q_format;
	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);
}

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

	memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
	irq_ptr->qdioac1 = 0;
	memset(&irq_ptr->ccw, 0, sizeof(irq_ptr->ccw));
	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;

	/* wipes qib.ac, required by ar7063 */
	memset(irq_ptr->qdr, 0, sizeof(struct qdr));

	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);
	set_impl_params(irq_ptr, init_data->qib_param_field_format,
			init_data->qib_param_field,
			init_data->input_slib_elements,
			init_data->output_slib_elements);

	/* 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));

	/* get qdio commands */
	ciw = ccw_device_get_ciw(cdev, CIW_TYPE_EQUEUE);
	if (!ciw) {
		DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no);
		return -EINVAL;
	}
	irq_ptr->equeue = *ciw;

	ciw = ccw_device_get_ciw(cdev, CIW_TYPE_AQUEUE);
	if (!ciw) {
		DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no);
		return -EINVAL;
	}
	irq_ptr->aqueue = *ciw;

	return 0;
}

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)
{
	char s[80];

	snprintf(s, 80, "qdio: %s %s on SC %x using AI:%d QEBSM:%d PRI:%d TDD:%d SIGA:%s%s%s\n",
		 dev_name(&irq_ptr->cdev->dev),
		 (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" : " ");
	printk(KERN_INFO "%s", s);
}

int __init qdio_setup_init(void)
{
	int rc;

	qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
					 256, 0, NULL);
	if (!qdio_q_cache)
		return -ENOMEM;

	qdio_aob_cache = kmem_cache_create("qdio_aob",
					sizeof(struct qaob),
					sizeof(struct qaob),
					0,
					NULL);
	if (!qdio_aob_cache) {
		rc = -ENOMEM;
		goto free_qdio_q_cache;
	}

	/* 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", (qebsm_possible()) ? 1 : 0);
	rc = 0;
out:
	return rc;
free_qdio_q_cache:
	kmem_cache_destroy(qdio_q_cache);
	goto out;
}

void qdio_setup_exit(void)
{
	kmem_cache_destroy(qdio_aob_cache);
	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	26	static struct kmem_cache *qdio_q_cache;
104ea556	27	static struct kmem_cache *qdio_aob_cache;
104ea556	28
400d8291	29	struct qaob *qdio_allocate_aob(void)
104ea556	30	{
400d8291	31	return kmem_cache_zalloc(qdio_aob_cache, GFP_ATOMIC);
104ea556	32	}
396c1004	33	EXPORT_SYMBOL_GPL(qdio_allocate_aob);
104ea556	34
	35	void qdio_release_aob(struct qaob *aob)
	36	{
	37	kmem_cache_free(qdio_aob_cache, aob);
	38	}
	39	EXPORT_SYMBOL_GPL(qdio_release_aob);
779e6e1c	40
5245c924 SO	41	/**
	42	* qdio_free_buffers() - free qdio buffers
	43	* @buf: array of pointers to qdio buffers
	44	* @count: number of qdio buffers to free
	45	*/
	46	void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count)
	47	{
	48	int pos;
	49
	50	for (pos = 0; pos < count; pos += QBUFF_PER_PAGE)
	51	free_page((unsigned long) buf[pos]);
	52	}
	53	EXPORT_SYMBOL_GPL(qdio_free_buffers);
	54
	55	/**
	56	* qdio_alloc_buffers() - allocate qdio buffers
	57	* @buf: array of pointers to qdio buffers
	58	* @count: number of qdio buffers to allocate
	59	*/
	60	int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count)
	61	{
	62	int pos;
	63
	64	for (pos = 0; pos < count; pos += QBUFF_PER_PAGE) {
	65	buf[pos] = (void *) get_zeroed_page(GFP_KERNEL);
	66	if (!buf[pos]) {
	67	qdio_free_buffers(buf, count);
	68	return -ENOMEM;
	69	}
	70	}
	71	for (pos = 0; pos < count; pos++)
	72	if (pos % QBUFF_PER_PAGE)
	73	buf[pos] = buf[pos - 1] + 1;
	74	return 0;
	75	}
	76	EXPORT_SYMBOL_GPL(qdio_alloc_buffers);
	77
	78	/**
	79	* qdio_reset_buffers() - reset qdio buffers
	80	* @buf: array of pointers to qdio buffers
	81	* @count: number of qdio buffers that will be zeroed
	82	*/
	83	void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count)
	84	{
	85	int pos;
	86
	87	for (pos = 0; pos < count; pos++)
	88	memset(buf[pos], 0, sizeof(struct qdio_buffer));
	89	}
	90	EXPORT_SYMBOL_GPL(qdio_reset_buffers);
	91
779e6e1c JG	92	/*
	93	* qebsm is only available under 64bit but the adapter sets the feature
	94	* flag anyway, so we manually override it.
	95	*/
	96	static inline int qebsm_possible(void)
	97	{
779e6e1c	98	return css_general_characteristics.qebsm;
779e6e1c JG	99	}
	100
	101	/*
	102	* qib_param_field: pointer to 128 bytes or NULL, if no param field
	103	* nr_input_qs: pointer to nr_queues*128 words of data or NULL
	104	*/
	105	static void set_impl_params(struct qdio_irq *irq_ptr,
	106	unsigned int qib_param_field_format,
	107	unsigned char *qib_param_field,
	108	unsigned long *input_slib_elements,
	109	unsigned long *output_slib_elements)
	110	{
	111	struct qdio_q *q;
	112	int i, j;
	113
	114	if (!irq_ptr)
	115	return;
	116
779e6e1c JG	117	irq_ptr->qib.pfmt = qib_param_field_format;
	118	if (qib_param_field)
	119	memcpy(irq_ptr->qib.parm, qib_param_field,
9f494438	120	sizeof(irq_ptr->qib.parm));
779e6e1c JG	121
	122	if (!input_slib_elements)
	123	goto output;
	124
	125	for_each_input_queue(irq_ptr, q, i) {
	126	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
	127	q->slib->slibe[j].parms =
	128	input_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
	129	}
	130	output:
	131	if (!output_slib_elements)
	132	return;
	133
	134	for_each_output_queue(irq_ptr, q, i) {
	135	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
	136	q->slib->slibe[j].parms =
	137	output_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
	138	}
	139	}
	140
2a7cf35c JW	141	static void __qdio_free_queues(struct qdio_q **queues, unsigned int count)
	142	{
	143	struct qdio_q *q;
	144	unsigned int i;
	145
	146	for (i = 0; i < count; i++) {
	147	q = queues[i];
	148	free_page((unsigned long) q->slib);
	149	kmem_cache_free(qdio_q_cache, q);
	150	}
	151	}
	152
d188cac3 JW	153	void qdio_free_queues(struct qdio_irq *irq_ptr)
	154	{
	155	__qdio_free_queues(irq_ptr->input_qs, irq_ptr->max_input_qs);
	156	irq_ptr->max_input_qs = 0;
	157
	158	__qdio_free_queues(irq_ptr->output_qs, irq_ptr->max_output_qs);
	159	irq_ptr->max_output_qs = 0;
	160	}
	161
779e6e1c JG	162	static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
	163	{
	164	struct qdio_q *q;
	165	int i;
	166
	167	for (i = 0; i < nr_queues; i++) {
e5218134	168	q = kmem_cache_zalloc(qdio_q_cache, GFP_KERNEL);
2a7cf35c JW	169	if (!q) {
2a7cf35c JW	170	__qdio_free_queues(irq_ptr_qs, i);
779e6e1c	171	return -ENOMEM;
2a7cf35c	172	}
779e6e1c JG	173
	174	q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
	175	if (!q->slib) {
	176	kmem_cache_free(qdio_q_cache, q);
2a7cf35c	177	__qdio_free_queues(irq_ptr_qs, i);
779e6e1c JG	178	return -ENOMEM;
779e6e1c JG	179	}
779e6e1c JG	180	irq_ptr_qs[i] = q;
	181	}
	182	return 0;
	183	}
	184
	185	int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs)
	186	{
	187	int rc;
	188
	189	rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
	190	if (rc)
	191	return rc;
2a7cf35c	192
779e6e1c	193	rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
d188cac3	194	if (rc) {
2a7cf35c	195	__qdio_free_queues(irq_ptr->input_qs, nr_input_qs);
d188cac3 JW	196	return rc;
d188cac3 JW	197	}
2a7cf35c	198
d188cac3 JW	199	irq_ptr->max_input_qs = nr_input_qs;
	200	irq_ptr->max_output_qs = nr_output_qs;
	201	return 0;
779e6e1c JG	202	}
	203
	204	static void setup_queues_misc(struct qdio_q q, struct qdio_irq irq_ptr,
	205	qdio_handler_t *handler, int i)
	206	{
5382fe11	207	struct slib *slib = q->slib;
779e6e1c	208
5382fe11 JG	209	/* queue must be cleared for qdio_establish */
	210	memset(q, 0, sizeof(*q));
	211	memset(slib, 0, PAGE_SIZE);
	212	q->slib = slib;
779e6e1c JG	213	q->irq_ptr = irq_ptr;
	214	q->mask = 1 << (31 - i);
	215	q->nr = i;
	216	q->handler = handler;
	217	}
	218
	219	static void setup_storage_lists(struct qdio_q q, struct qdio_irq irq_ptr,
bdf11767	220	struct qdio_buffer **sbals_array, int i)
779e6e1c JG	221	{
	222	struct qdio_q *prev;
	223	int j;
	224
22f99347	225	DBF_HEX(&q, sizeof(void *));
779e6e1c JG	226	q->sl = (struct sl )((char )q->slib + PAGE_SIZE / 2);
	227
	228	/* fill in sbal */
ce1d8014	229	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
779e6e1c	230	q->sbal[j] = *sbals_array++;
779e6e1c JG	231
	232	/* fill in slib */
	233	if (i > 0) {
	234	prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
	235	: irq_ptr->output_qs[i - 1];
	236	prev->slib->nsliba = (unsigned long)q->slib;
	237	}
	238
	239	q->slib->sla = (unsigned long)q->sl;
	240	q->slib->slsba = (unsigned long)&q->slsb.val[0];
	241
	242	/* fill in sl */
	243	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
e9091ffd	244	q->sl->element[j].sbal = virt_to_phys(q->sbal[j]);
779e6e1c JG	245	}
	246
	247	static void setup_queues(struct qdio_irq *irq_ptr,
	248	struct qdio_initialize *qdio_init)
	249	{
779e6e1c	250	struct qdio_q *q;
779e6e1c JG	251	int i;
779e6e1c JG	252
779e6e1c	253	for_each_input_queue(irq_ptr, q, i) {
104ea556	254	DBF_EVENT("inq:%1d", i);
779e6e1c JG	255	setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);
	256
	257	q->is_input_q = 1;
104ea556	258
d8564e19 JW	259	setup_storage_lists(q, irq_ptr,
d8564e19 JW	260	qdio_init->input_sbal_addr_array[i], i);
779e6e1c JG	261	}
	262
	263	for_each_output_queue(irq_ptr, q, i) {
22f99347	264	DBF_EVENT("outq:%1d", i);
779e6e1c JG	265	setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);
	266
	267	q->is_input_q = 0;
d8564e19 JW	268	setup_storage_lists(q, irq_ptr,
d8564e19 JW	269	qdio_init->output_sbal_addr_array[i], i);
779e6e1c JG	270	}
	271	}
	272
779e6e1c JG	273	static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
	274	unsigned char qdioac, unsigned long token)
	275	{
779e6e1c JG	276	if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM))
	277	goto no_qebsm;
	278	if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) \|\|
	279	(!(qdioac & AC1_SC_QEBSM_ENABLED)))
	280	goto no_qebsm;
	281
	282	irq_ptr->sch_token = token;
	283
22f99347 JG	284	DBF_EVENT("V=V:1");
22f99347 JG	285	DBF_EVENT("%8lx", irq_ptr->sch_token);
779e6e1c JG	286	return;
	287
	288	no_qebsm:
	289	irq_ptr->sch_token = 0;
	290	irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
22f99347	291	DBF_EVENT("noV=V");
779e6e1c JG	292	}
779e6e1c JG	293
bbd50e17 JG	294	/*
	295	* If there is a qdio_irq we use the chsc_page and store the information
	296	* in the qdio_irq, otherwise we copy it to the specified structure.
	297	*/
	298	int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
	299	struct subchannel_id *schid,
	300	struct qdio_ssqd_desc *data)
779e6e1c JG	301	{
	302	struct chsc_ssqd_area *ssqd;
	303	int rc;
	304
22f99347	305	DBF_EVENT("getssqd:%4x", schid->sch_no);
da5b6cb1	306	if (!irq_ptr) {
bbd50e17	307	ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
da5b6cb1 SO	308	if (!ssqd)
	309	return -ENOMEM;
	310	} else {
	311	ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
	312	}
	313
	314	rc = chsc_ssqd(*schid, ssqd);
779e6e1c	315	if (rc)
da5b6cb1	316	goto out;
779e6e1c JG	317
	318	if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) \|\|
	319	!(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) \|\|
bbd50e17	320	(ssqd->qdio_ssqd.sch != schid->sch_no))
da5b6cb1 SO	321	rc = -EINVAL;
	322
	323	if (!rc)
	324	memcpy(data, &ssqd->qdio_ssqd, sizeof(*data));
	325
	326	out:
	327	if (!irq_ptr)
bbd50e17	328	free_page((unsigned long)ssqd);
da5b6cb1 SO	329
da5b6cb1 SO	330	return rc;
779e6e1c JG	331	}
	332
	333	void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
	334	{
	335	unsigned char qdioac;
779e6e1c JG	336	int rc;
779e6e1c JG	337
da5b6cb1	338	rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, &irq_ptr->ssqd_desc);
779e6e1c	339	if (rc) {
22f99347 JG	340	DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no);
22f99347 JG	341	DBF_ERROR("rc:%x", rc);
779e6e1c JG	342	/* all flags set, worst case */
	343	qdioac = AC1_SIGA_INPUT_NEEDED \| AC1_SIGA_OUTPUT_NEEDED \|
	344	AC1_SIGA_SYNC_NEEDED;
	345	} else
	346	qdioac = irq_ptr->ssqd_desc.qdioac1;
	347
	348	check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token);
10376b53	349	irq_ptr->qdioac1 = qdioac;
61d84979 JG	350	DBF_EVENT("ac 1:%2x 2:%4x", qdioac, irq_ptr->ssqd_desc.qdioac2);
61d84979 JG	351	DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac);
779e6e1c JG	352	}
779e6e1c JG	353
4d4a3caa	354	static void qdio_fill_qdr_desc(struct qdesfmt0 desc, struct qdio_q queue)
779e6e1c	355	{
4d4a3caa JW	356	desc->sliba = virt_to_phys(queue->slib);
	357	desc->sla = virt_to_phys(queue->sl);
	358	desc->slsba = virt_to_phys(&queue->slsb);
	359
	360	desc->akey = PAGE_DEFAULT_KEY >> 4;
	361	desc->bkey = PAGE_DEFAULT_KEY >> 4;
	362	desc->ckey = PAGE_DEFAULT_KEY >> 4;
	363	desc->dkey = PAGE_DEFAULT_KEY >> 4;
779e6e1c JG	364	}
	365
	366	static void setup_qdr(struct qdio_irq *irq_ptr,
	367	struct qdio_initialize *qdio_init)
	368	{
4d4a3caa	369	struct qdesfmt0 *desc = &irq_ptr->qdr->qdf0[0];
779e6e1c JG	370	int i;
	371
	372	irq_ptr->qdr->qfmt = qdio_init->q_format;
dfe5bb50	373	irq_ptr->qdr->ac = qdio_init->qdr_ac;
779e6e1c JG	374	irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
	375	irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
	376	irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */
	377	irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
4d4a3caa	378	irq_ptr->qdr->qiba = virt_to_phys(&irq_ptr->qib);
d1bf8590	379	irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4;
779e6e1c JG	380
779e6e1c JG	381	for (i = 0; i < qdio_init->no_input_qs; i++)
4d4a3caa	382	qdio_fill_qdr_desc(desc++, irq_ptr->input_qs[i]);
779e6e1c JG	383
779e6e1c JG	384	for (i = 0; i < qdio_init->no_output_qs; i++)
4d4a3caa	385	qdio_fill_qdr_desc(desc++, irq_ptr->output_qs[i]);
779e6e1c JG	386	}
	387
	388	static void setup_qib(struct qdio_irq *irq_ptr,
	389	struct qdio_initialize *init_data)
	390	{
	391	if (qebsm_possible())
	392	irq_ptr->qib.rflags \|= QIB_RFLAGS_ENABLE_QEBSM;
	393
dcc18f48 CS	394	irq_ptr->qib.rflags \|= init_data->qib_rflags;
dcc18f48 CS	395
779e6e1c JG	396	irq_ptr->qib.qfmt = init_data->q_format;
	397	if (init_data->no_input_qs)
	398	irq_ptr->qib.isliba =
	399	(unsigned long)(irq_ptr->input_qs[0]->slib);
	400	if (init_data->no_output_qs)
	401	irq_ptr->qib.osliba =
	402	(unsigned long)(irq_ptr->output_qs[0]->slib);
180a4c42 JW	403	memcpy(irq_ptr->qib.ebcnam, dev_name(&irq_ptr->cdev->dev), 8);
180a4c42 JW	404	ASCEBC(irq_ptr->qib.ebcnam, 8);
779e6e1c JG	405	}
779e6e1c JG	406
014816b6	407	int qdio_setup_irq(struct qdio_irq irq_ptr, struct qdio_initialize init_data)
779e6e1c	408	{
b2745655	409	struct ccw_device *cdev = irq_ptr->cdev;
779e6e1c	410	struct ciw *ciw;
779e6e1c	411
432ac5e0	412	memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
10376b53	413	irq_ptr->qdioac1 = 0;
432ac5e0 JG	414	memset(&irq_ptr->ccw, 0, sizeof(irq_ptr->ccw));
	415	memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc));
	416	memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
	417
d5d006fa	418	irq_ptr->debugfs_dev = NULL;
6e2a7b51 JW	419	irq_ptr->sch_token = irq_ptr->perf_stat_enabled = 0;
6e2a7b51 JW	420	irq_ptr->state = QDIO_IRQ_STATE_INACTIVE;
432ac5e0	421
779e6e1c JG	422	/* wipes qib.ac, required by ar7063 */
	423	memset(irq_ptr->qdr, 0, sizeof(struct qdr));
	424
	425	irq_ptr->int_parm = init_data->int_parm;
	426	irq_ptr->nr_input_qs = init_data->no_input_qs;
	427	irq_ptr->nr_output_qs = init_data->no_output_qs;
dd62abd2	428	ccw_device_get_schid(cdev, &irq_ptr->schid);
779e6e1c JG	429	setup_queues(irq_ptr, init_data);
779e6e1c JG	430
1ecbcfd5 JW	431	irq_ptr->irq_poll = init_data->irq_poll;
1ecbcfd5 JW	432	set_bit(QDIO_IRQ_DISABLED, &irq_ptr->poll_state);
0a6e6345	433
779e6e1c	434	setup_qib(irq_ptr, init_data);
779e6e1c JG	435	set_impl_params(irq_ptr, init_data->qib_param_field_format,
	436	init_data->qib_param_field,
	437	init_data->input_slib_elements,
	438	init_data->output_slib_elements);
	439
	440	/* fill input and output descriptors */
	441	setup_qdr(irq_ptr, init_data);
	442
	443	/* qdr, qib, sls, slsbs, slibs, sbales are filled now */
	444
7b942b4b JW	445	/* set our IRQ handler */
	446	spin_lock_irq(get_ccwdev_lock(cdev));
	447	irq_ptr->orig_handler = cdev->handler;
	448	cdev->handler = qdio_int_handler;
	449	spin_unlock_irq(get_ccwdev_lock(cdev));
	450
779e6e1c	451	/* get qdio commands */
dd62abd2	452	ciw = ccw_device_get_ciw(cdev, CIW_TYPE_EQUEUE);
779e6e1c	453	if (!ciw) {
22f99347	454	DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no);
2e68adcd	455	return -EINVAL;
779e6e1c JG	456	}
	457	irq_ptr->equeue = *ciw;
	458
dd62abd2	459	ciw = ccw_device_get_ciw(cdev, CIW_TYPE_AQUEUE);
779e6e1c	460	if (!ciw) {
22f99347	461	DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no);
2e68adcd	462	return -EINVAL;
779e6e1c JG	463	}
	464	irq_ptr->aqueue = *ciw;
	465
7b942b4b JW	466	return 0;
	467	}
	468
	469	void qdio_shutdown_irq(struct qdio_irq *irq)
	470	{
	471	struct ccw_device *cdev = irq->cdev;
	472
	473	/* restore IRQ handler */
dd62abd2	474	spin_lock_irq(get_ccwdev_lock(cdev));
7b942b4b JW	475	cdev->handler = irq->orig_handler;
7b942b4b JW	476	cdev->private->intparm = 0;
dd62abd2	477	spin_unlock_irq(get_ccwdev_lock(cdev));
779e6e1c JG	478	}
779e6e1c JG	479
b2745655	480	void qdio_print_subchannel_info(struct qdio_irq *irq_ptr)
779e6e1c JG	481	{
	482	char s[80];
	483
e2af48df	484	snprintf(s, 80, "qdio: %s %s on SC %x using AI:%d QEBSM:%d PRI:%d TDD:%d SIGA:%s%s%s\n",
b2745655	485	dev_name(&irq_ptr->cdev->dev),
22f99347 JG	486	(irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
	487	((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
	488	irq_ptr->schid.sch_no,
	489	is_thinint_irq(irq_ptr),
	490	(irq_ptr->sch_token) ? 1 : 0,
f85b2b29	491	pci_out_supported(irq_ptr) ? 1 : 0,
22f99347	492	css_general_characteristics.aif_tdd,
10376b53 JW	493	qdio_need_siga_in(irq_ptr) ? "R" : " ",
	494	qdio_need_siga_out(irq_ptr) ? "W" : " ",
	495	qdio_need_siga_sync(irq_ptr) ? "S" : " ");
75f62761	496	printk(KERN_INFO "%s", s);
779e6e1c JG	497	}
	498
	499	int __init qdio_setup_init(void)
	500	{
104ea556	501	int rc;
104ea556	502
779e6e1c JG	503	qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
	504	256, 0, NULL);
	505	if (!qdio_q_cache)
	506	return -ENOMEM;
	507
104ea556	508	qdio_aob_cache = kmem_cache_create("qdio_aob",
	509	sizeof(struct qaob),
	510	sizeof(struct qaob),
	511	0,
	512	NULL);
	513	if (!qdio_aob_cache) {
	514	rc = -ENOMEM;
	515	goto free_qdio_q_cache;
	516	}
	517
779e6e1c	518	/* Check for OSA/FCP thin interrupts (bit 67). */
22f99347 JG	519	DBF_EVENT("thinint:%1d",
22f99347 JG	520	(css_general_characteristics.aif_osa) ? 1 : 0);
779e6e1c JG	521
779e6e1c JG	522	/* Check for QEBSM support in general (bit 58). */
22f99347	523	DBF_EVENT("cssQEBSM:%1d", (qebsm_possible()) ? 1 : 0);
104ea556	524	rc = 0;
	525	out:
	526	return rc;
	527	free_qdio_q_cache:
	528	kmem_cache_destroy(qdio_q_cache);
	529	goto out;
779e6e1c JG	530	}
779e6e1c JG	531
3f1934bc	532	void qdio_setup_exit(void)
779e6e1c	533	{
104ea556	534	kmem_cache_destroy(qdio_aob_cache);
779e6e1c JG	535	kmem_cache_destroy(qdio_q_cache);
779e6e1c JG	536	}