[linux-2.6-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 <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);
}

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 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)
			return -ENOMEM;

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

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;
	INIT_LIST_HEAD(&q->entry);
}

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 = (unsigned long)q->sbal[j];
}

static void setup_queues(struct qdio_irq *irq_ptr,
			 struct qdio_initialize *qdio_init)
{
	struct qdio_q *q;
	struct qdio_buffer **input_sbal_array = qdio_init->input_sbal_addr_array;
	struct qdio_buffer **output_sbal_array = qdio_init->output_sbal_addr_array;
	struct qdio_outbuf_state *output_sbal_state_array =
				  qdio_init->output_sbal_state_array;
	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;
		q->u.in.queue_start_poll = qdio_init->queue_start_poll_array ?
				qdio_init->queue_start_poll_array[i] : NULL;

		setup_storage_lists(q, irq_ptr, input_sbal_array, i);
		input_sbal_array += QDIO_MAX_BUFFERS_PER_Q;

		if (is_thinint_irq(irq_ptr)) {
			tasklet_init(&q->tasklet, tiqdio_inbound_processing,
				     (unsigned long) q);
		} else {
			tasklet_init(&q->tasklet, qdio_inbound_processing,
				     (unsigned long) q);
		}
	}

	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->u.out.sbal_state = output_sbal_state_array;
		output_sbal_state_array += QDIO_MAX_BUFFERS_PER_Q;

		q->is_input_q = 0;
		setup_storage_lists(q, irq_ptr, output_sbal_array, i);
		output_sbal_array += QDIO_MAX_BUFFERS_PER_Q;

		tasklet_init(&q->tasklet, qdio_outbound_processing,
			     (unsigned long) q);
		timer_setup(&q->u.out.timer, qdio_outbound_timer, 0);
	}
}

static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac)
{
	if (qdioac & AC1_SIGA_INPUT_NEEDED)
		irq_ptr->siga_flag.input = 1;
	if (qdioac & AC1_SIGA_OUTPUT_NEEDED)
		irq_ptr->siga_flag.output = 1;
	if (qdioac & AC1_SIGA_SYNC_NEEDED)
		irq_ptr->siga_flag.sync = 1;
	if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_THININT))
		irq_ptr->siga_flag.sync_after_ai = 1;
	if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI))
		irq_ptr->siga_flag.sync_out_after_pci = 1;
}

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);
	process_ac_flags(irq_ptr, 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);
}

void qdio_release_memory(struct qdio_irq *irq_ptr)
{
	struct qdio_q *q;
	int i;

	/*
	 * Must check queue array manually since irq_ptr->nr_input_queues /
	 * irq_ptr->nr_input_queues may not yet be set.
	 */
	for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
		q = irq_ptr->input_qs[i];
		if (q) {
			free_page((unsigned long) q->slib);
			kmem_cache_free(qdio_q_cache, q);
		}
	}
	for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
		q = irq_ptr->output_qs[i];
		if (q) {
			if (q->u.out.use_cq) {
				int n;

				for (n = 0; n < QDIO_MAX_BUFFERS_PER_Q; ++n) {
					struct qaob *aob = q->u.out.aobs[n];
					if (aob) {
						qdio_release_aob(aob);
						q->u.out.aobs[n] = NULL;
					}
				}

				qdio_disable_async_operation(&q->u.out);
			}
			free_page((unsigned long) q->slib);
			kmem_cache_free(qdio_q_cache, q);
		}
	}
	free_page((unsigned long) irq_ptr->qdr);
	free_page(irq_ptr->chsc_page);
	free_page((unsigned long) irq_ptr);
}

static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr,
				     struct qdio_q **irq_ptr_qs,
				     int i, int nr)
{
	irq_ptr->qdr->qdf0[i + nr].sliba =
		(unsigned long)irq_ptr_qs[i]->slib;

	irq_ptr->qdr->qdf0[i + nr].sla =
		(unsigned long)irq_ptr_qs[i]->sl;

	irq_ptr->qdr->qdf0[i + nr].slsba =
		(unsigned long)&irq_ptr_qs[i]->slsb.val[0];

	irq_ptr->qdr->qdf0[i + nr].akey = PAGE_DEFAULT_KEY >> 4;
	irq_ptr->qdr->qdf0[i + nr].bkey = PAGE_DEFAULT_KEY >> 4;
	irq_ptr->qdr->qdf0[i + nr].ckey = PAGE_DEFAULT_KEY >> 4;
	irq_ptr->qdr->qdf0[i + nr].dkey = PAGE_DEFAULT_KEY >> 4;
}

static void setup_qdr(struct qdio_irq *irq_ptr,
		      struct qdio_initialize *qdio_init)
{
	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 = (unsigned long)&irq_ptr->qib;
	irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4;

	for (i = 0; i < qdio_init->no_input_qs; i++)
		__qdio_allocate_fill_qdr(irq_ptr, irq_ptr->input_qs, i, 0);

	for (i = 0; i < qdio_init->no_output_qs; i++)
		__qdio_allocate_fill_qdr(irq_ptr, irq_ptr->output_qs, i,
					 qdio_init->no_input_qs);
}

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, init_data->adapter_name, 8);
}

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

	memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
	memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag));
	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 = irq_ptr->debugfs_perf = NULL;
	irq_ptr->sch_token = irq_ptr->state = irq_ptr->perf_stat_enabled = 0;

	/* 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;
	irq_ptr->cdev = init_data->cdev;
	irq_ptr->scan_threshold = init_data->scan_threshold;
	ccw_device_get_schid(irq_ptr->cdev, &irq_ptr->schid);
	setup_queues(irq_ptr, init_data);

	setup_qib(irq_ptr, init_data);
	qdio_setup_thinint(irq_ptr);
	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 */

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

	/* set new interrupt handler */
	spin_lock_irq(get_ccwdev_lock(irq_ptr->cdev));
	irq_ptr->orig_handler = init_data->cdev->handler;
	init_data->cdev->handler = qdio_int_handler;
	spin_unlock_irq(get_ccwdev_lock(irq_ptr->cdev));
	return 0;
}

void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
				struct ccw_device *cdev)
{
	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%s%s\n",
		 dev_name(&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,
		 (irq_ptr->siga_flag.input) ? "R" : " ",
		 (irq_ptr->siga_flag.output) ? "W" : " ",
		 (irq_ptr->siga_flag.sync) ? "S" : " ",
		 (irq_ptr->siga_flag.sync_after_ai) ? "A" : " ",
		 (irq_ptr->siga_flag.sync_out_after_pci) ? "P" : " ");
	printk(KERN_INFO "%s", s);
}

int qdio_enable_async_operation(struct qdio_output_q *outq)
{
	outq->aobs = kcalloc(QDIO_MAX_BUFFERS_PER_Q, sizeof(struct qaob *),
			     GFP_ATOMIC);
	if (!outq->aobs) {
		outq->use_cq = 0;
		return -ENOMEM;
	}
	outq->use_cq = 1;
	return 0;
}

void qdio_disable_async_operation(struct qdio_output_q *q)
{
	kfree(q->aobs);
	q->aobs = NULL;
	q->use_cq = 0;
}

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>
779e6e1c JG	11	#include <asm/qdio.h>
	12
	13	#include "cio.h"
	14	#include "css.h"
	15	#include "device.h"
	16	#include "ioasm.h"
	17	#include "chsc.h"
	18	#include "qdio.h"
	19	#include "qdio_debug.h"
	20
5245c924 SO	21	#define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer))
5245c924 SO	22
779e6e1c	23	static struct kmem_cache *qdio_q_cache;
104ea556	24	static struct kmem_cache *qdio_aob_cache;
104ea556	25
400d8291	26	struct qaob *qdio_allocate_aob(void)
104ea556	27	{
400d8291	28	return kmem_cache_zalloc(qdio_aob_cache, GFP_ATOMIC);
104ea556	29	}
104ea556	30
	31	void qdio_release_aob(struct qaob *aob)
	32	{
	33	kmem_cache_free(qdio_aob_cache, aob);
	34	}
	35	EXPORT_SYMBOL_GPL(qdio_release_aob);
779e6e1c	36
5245c924 SO	37	/**
	38	* qdio_free_buffers() - free qdio buffers
	39	* @buf: array of pointers to qdio buffers
	40	* @count: number of qdio buffers to free
	41	*/
	42	void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count)
	43	{
	44	int pos;
	45
	46	for (pos = 0; pos < count; pos += QBUFF_PER_PAGE)
	47	free_page((unsigned long) buf[pos]);
	48	}
	49	EXPORT_SYMBOL_GPL(qdio_free_buffers);
	50
	51	/**
	52	* qdio_alloc_buffers() - allocate qdio buffers
	53	* @buf: array of pointers to qdio buffers
	54	* @count: number of qdio buffers to allocate
	55	*/
	56	int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count)
	57	{
	58	int pos;
	59
	60	for (pos = 0; pos < count; pos += QBUFF_PER_PAGE) {
	61	buf[pos] = (void *) get_zeroed_page(GFP_KERNEL);
	62	if (!buf[pos]) {
	63	qdio_free_buffers(buf, count);
	64	return -ENOMEM;
	65	}
	66	}
	67	for (pos = 0; pos < count; pos++)
	68	if (pos % QBUFF_PER_PAGE)
	69	buf[pos] = buf[pos - 1] + 1;
	70	return 0;
	71	}
	72	EXPORT_SYMBOL_GPL(qdio_alloc_buffers);
	73
	74	/**
	75	* qdio_reset_buffers() - reset qdio buffers
	76	* @buf: array of pointers to qdio buffers
	77	* @count: number of qdio buffers that will be zeroed
	78	*/
	79	void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count)
	80	{
	81	int pos;
	82
	83	for (pos = 0; pos < count; pos++)
	84	memset(buf[pos], 0, sizeof(struct qdio_buffer));
	85	}
	86	EXPORT_SYMBOL_GPL(qdio_reset_buffers);
	87
779e6e1c JG	88	/*
	89	* qebsm is only available under 64bit but the adapter sets the feature
	90	* flag anyway, so we manually override it.
	91	*/
	92	static inline int qebsm_possible(void)
	93	{
779e6e1c	94	return css_general_characteristics.qebsm;
779e6e1c JG	95	}
	96
	97	/*
	98	* qib_param_field: pointer to 128 bytes or NULL, if no param field
	99	* nr_input_qs: pointer to nr_queues*128 words of data or NULL
	100	*/
	101	static void set_impl_params(struct qdio_irq *irq_ptr,
	102	unsigned int qib_param_field_format,
	103	unsigned char *qib_param_field,
	104	unsigned long *input_slib_elements,
	105	unsigned long *output_slib_elements)
	106	{
	107	struct qdio_q *q;
	108	int i, j;
	109
	110	if (!irq_ptr)
	111	return;
	112
779e6e1c JG	113	irq_ptr->qib.pfmt = qib_param_field_format;
	114	if (qib_param_field)
	115	memcpy(irq_ptr->qib.parm, qib_param_field,
9f494438	116	sizeof(irq_ptr->qib.parm));
779e6e1c JG	117
	118	if (!input_slib_elements)
	119	goto output;
	120
	121	for_each_input_queue(irq_ptr, q, i) {
	122	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
	123	q->slib->slibe[j].parms =
	124	input_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
	125	}
	126	output:
	127	if (!output_slib_elements)
	128	return;
	129
	130	for_each_output_queue(irq_ptr, q, i) {
	131	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
	132	q->slib->slibe[j].parms =
	133	output_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
	134	}
	135	}
	136
	137	static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
	138	{
	139	struct qdio_q *q;
	140	int i;
	141
	142	for (i = 0; i < nr_queues; i++) {
e5218134	143	q = kmem_cache_zalloc(qdio_q_cache, GFP_KERNEL);
779e6e1c JG	144	if (!q)
779e6e1c JG	145	return -ENOMEM;
779e6e1c JG	146
	147	q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
	148	if (!q->slib) {
	149	kmem_cache_free(qdio_q_cache, q);
	150	return -ENOMEM;
	151	}
779e6e1c	152	irq_ptr_qs[i] = q;
e54e4785	153	INIT_LIST_HEAD(&q->entry);
779e6e1c JG	154	}
	155	return 0;
	156	}
	157
	158	int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs)
	159	{
	160	int rc;
	161
	162	rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
	163	if (rc)
	164	return rc;
	165	rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
	166	return rc;
	167	}
	168
	169	static void setup_queues_misc(struct qdio_q q, struct qdio_irq irq_ptr,
	170	qdio_handler_t *handler, int i)
	171	{
5382fe11	172	struct slib *slib = q->slib;
779e6e1c	173
5382fe11 JG	174	/* queue must be cleared for qdio_establish */
	175	memset(q, 0, sizeof(*q));
	176	memset(slib, 0, PAGE_SIZE);
	177	q->slib = slib;
779e6e1c JG	178	q->irq_ptr = irq_ptr;
	179	q->mask = 1 << (31 - i);
	180	q->nr = i;
	181	q->handler = handler;
e54e4785	182	INIT_LIST_HEAD(&q->entry);
779e6e1c JG	183	}
	184
	185	static void setup_storage_lists(struct qdio_q q, struct qdio_irq irq_ptr,
bdf11767	186	struct qdio_buffer **sbals_array, int i)
779e6e1c JG	187	{
	188	struct qdio_q *prev;
	189	int j;
	190
22f99347	191	DBF_HEX(&q, sizeof(void *));
779e6e1c JG	192	q->sl = (struct sl )((char )q->slib + PAGE_SIZE / 2);
	193
	194	/* fill in sbal */
ce1d8014	195	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
779e6e1c	196	q->sbal[j] = *sbals_array++;
779e6e1c JG	197
	198	/* fill in slib */
	199	if (i > 0) {
	200	prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
	201	: irq_ptr->output_qs[i - 1];
	202	prev->slib->nsliba = (unsigned long)q->slib;
	203	}
	204
	205	q->slib->sla = (unsigned long)q->sl;
	206	q->slib->slsba = (unsigned long)&q->slsb.val[0];
	207
	208	/* fill in sl */
	209	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
	210	q->sl->element[j].sbal = (unsigned long)q->sbal[j];
779e6e1c JG	211	}
	212
	213	static void setup_queues(struct qdio_irq *irq_ptr,
	214	struct qdio_initialize *qdio_init)
	215	{
779e6e1c	216	struct qdio_q *q;
bdf11767 JW	217	struct qdio_buffer **input_sbal_array = qdio_init->input_sbal_addr_array;
bdf11767 JW	218	struct qdio_buffer **output_sbal_array = qdio_init->output_sbal_addr_array;
104ea556	219	struct qdio_outbuf_state *output_sbal_state_array =
104ea556	220	qdio_init->output_sbal_state_array;
779e6e1c JG	221	int i;
779e6e1c JG	222
779e6e1c	223	for_each_input_queue(irq_ptr, q, i) {
104ea556	224	DBF_EVENT("inq:%1d", i);
779e6e1c JG	225	setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);
	226
	227	q->is_input_q = 1;
e58b0d90 SM	228	q->u.in.queue_start_poll = qdio_init->queue_start_poll_array ?
e58b0d90 SM	229	qdio_init->queue_start_poll_array[i] : NULL;
104ea556	230
22f99347	231	setup_storage_lists(q, irq_ptr, input_sbal_array, i);
779e6e1c JG	232	input_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
779e6e1c JG	233
104ea556	234	if (is_thinint_irq(irq_ptr)) {
779e6e1c JG	235	tasklet_init(&q->tasklet, tiqdio_inbound_processing,
779e6e1c JG	236	(unsigned long) q);
104ea556	237	} else {
779e6e1c JG	238	tasklet_init(&q->tasklet, qdio_inbound_processing,
779e6e1c JG	239	(unsigned long) q);
104ea556	240	}
779e6e1c JG	241	}
	242
	243	for_each_output_queue(irq_ptr, q, i) {
22f99347	244	DBF_EVENT("outq:%1d", i);
779e6e1c JG	245	setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);
779e6e1c JG	246
104ea556	247	q->u.out.sbal_state = output_sbal_state_array;
	248	output_sbal_state_array += QDIO_MAX_BUFFERS_PER_Q;
	249
779e6e1c	250	q->is_input_q = 0;
22f99347	251	setup_storage_lists(q, irq_ptr, output_sbal_array, i);
779e6e1c JG	252	output_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
	253
	254	tasklet_init(&q->tasklet, qdio_outbound_processing,
	255	(unsigned long) q);
cb9f780a	256	timer_setup(&q->u.out.timer, qdio_outbound_timer, 0);
779e6e1c JG	257	}
	258	}
	259
	260	static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac)
	261	{
	262	if (qdioac & AC1_SIGA_INPUT_NEEDED)
	263	irq_ptr->siga_flag.input = 1;
	264	if (qdioac & AC1_SIGA_OUTPUT_NEEDED)
	265	irq_ptr->siga_flag.output = 1;
	266	if (qdioac & AC1_SIGA_SYNC_NEEDED)
	267	irq_ptr->siga_flag.sync = 1;
90adac58 JG	268	if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_THININT))
	269	irq_ptr->siga_flag.sync_after_ai = 1;
	270	if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI))
	271	irq_ptr->siga_flag.sync_out_after_pci = 1;
779e6e1c JG	272	}
	273
	274	static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
	275	unsigned char qdioac, unsigned long token)
	276	{
779e6e1c JG	277	if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM))
	278	goto no_qebsm;
	279	if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) \|\|
	280	(!(qdioac & AC1_SC_QEBSM_ENABLED)))
	281	goto no_qebsm;
	282
	283	irq_ptr->sch_token = token;
	284
22f99347 JG	285	DBF_EVENT("V=V:1");
22f99347 JG	286	DBF_EVENT("%8lx", irq_ptr->sch_token);
779e6e1c JG	287	return;
	288
	289	no_qebsm:
	290	irq_ptr->sch_token = 0;
	291	irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
22f99347	292	DBF_EVENT("noV=V");
779e6e1c JG	293	}
779e6e1c JG	294
bbd50e17 JG	295	/*
	296	* If there is a qdio_irq we use the chsc_page and store the information
	297	* in the qdio_irq, otherwise we copy it to the specified structure.
	298	*/
	299	int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
	300	struct subchannel_id *schid,
	301	struct qdio_ssqd_desc *data)
779e6e1c JG	302	{
	303	struct chsc_ssqd_area *ssqd;
	304	int rc;
	305
22f99347	306	DBF_EVENT("getssqd:%4x", schid->sch_no);
da5b6cb1	307	if (!irq_ptr) {
bbd50e17	308	ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
da5b6cb1 SO	309	if (!ssqd)
	310	return -ENOMEM;
	311	} else {
	312	ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
	313	}
	314
	315	rc = chsc_ssqd(*schid, ssqd);
779e6e1c	316	if (rc)
da5b6cb1	317	goto out;
779e6e1c JG	318
	319	if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) \|\|
	320	!(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) \|\|
bbd50e17	321	(ssqd->qdio_ssqd.sch != schid->sch_no))
da5b6cb1 SO	322	rc = -EINVAL;
	323
	324	if (!rc)
	325	memcpy(data, &ssqd->qdio_ssqd, sizeof(*data));
	326
	327	out:
	328	if (!irq_ptr)
bbd50e17	329	free_page((unsigned long)ssqd);
da5b6cb1 SO	330
da5b6cb1 SO	331	return rc;
779e6e1c JG	332	}
	333
	334	void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
	335	{
	336	unsigned char qdioac;
779e6e1c JG	337	int rc;
779e6e1c JG	338
da5b6cb1	339	rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, &irq_ptr->ssqd_desc);
779e6e1c	340	if (rc) {
22f99347 JG	341	DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no);
22f99347 JG	342	DBF_ERROR("rc:%x", rc);
779e6e1c JG	343	/* all flags set, worst case */
	344	qdioac = AC1_SIGA_INPUT_NEEDED \| AC1_SIGA_OUTPUT_NEEDED \|
	345	AC1_SIGA_SYNC_NEEDED;
	346	} else
	347	qdioac = irq_ptr->ssqd_desc.qdioac1;
	348
	349	check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token);
	350	process_ac_flags(irq_ptr, qdioac);
61d84979 JG	351	DBF_EVENT("ac 1:%2x 2:%4x", qdioac, irq_ptr->ssqd_desc.qdioac2);
61d84979 JG	352	DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac);
779e6e1c JG	353	}
	354
	355	void qdio_release_memory(struct qdio_irq *irq_ptr)
	356	{
	357	struct qdio_q *q;
	358	int i;
	359
	360	/*
	361	* Must check queue array manually since irq_ptr->nr_input_queues /
	362	* irq_ptr->nr_input_queues may not yet be set.
	363	*/
	364	for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
	365	q = irq_ptr->input_qs[i];
	366	if (q) {
	367	free_page((unsigned long) q->slib);
	368	kmem_cache_free(qdio_q_cache, q);
	369	}
	370	}
	371	for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
	372	q = irq_ptr->output_qs[i];
	373	if (q) {
104ea556	374	if (q->u.out.use_cq) {
	375	int n;
	376
	377	for (n = 0; n < QDIO_MAX_BUFFERS_PER_Q; ++n) {
	378	struct qaob *aob = q->u.out.aobs[n];
	379	if (aob) {
	380	qdio_release_aob(aob);
	381	q->u.out.aobs[n] = NULL;
	382	}
	383	}
	384
	385	qdio_disable_async_operation(&q->u.out);
	386	}
779e6e1c JG	387	free_page((unsigned long) q->slib);
	388	kmem_cache_free(qdio_q_cache, q);
	389	}
	390	}
3b8e3004	391	free_page((unsigned long) irq_ptr->qdr);
779e6e1c JG	392	free_page(irq_ptr->chsc_page);
	393	free_page((unsigned long) irq_ptr);
	394	}
	395
	396	static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr,
	397	struct qdio_q **irq_ptr_qs,
	398	int i, int nr)
	399	{
	400	irq_ptr->qdr->qdf0[i + nr].sliba =
	401	(unsigned long)irq_ptr_qs[i]->slib;
	402
	403	irq_ptr->qdr->qdf0[i + nr].sla =
	404	(unsigned long)irq_ptr_qs[i]->sl;
	405
	406	irq_ptr->qdr->qdf0[i + nr].slsba =
	407	(unsigned long)&irq_ptr_qs[i]->slsb.val[0];
	408
d1bf8590 HC	409	irq_ptr->qdr->qdf0[i + nr].akey = PAGE_DEFAULT_KEY >> 4;
	410	irq_ptr->qdr->qdf0[i + nr].bkey = PAGE_DEFAULT_KEY >> 4;
	411	irq_ptr->qdr->qdf0[i + nr].ckey = PAGE_DEFAULT_KEY >> 4;
	412	irq_ptr->qdr->qdf0[i + nr].dkey = PAGE_DEFAULT_KEY >> 4;
779e6e1c JG	413	}
	414
	415	static void setup_qdr(struct qdio_irq *irq_ptr,
	416	struct qdio_initialize *qdio_init)
	417	{
	418	int i;
	419
	420	irq_ptr->qdr->qfmt = qdio_init->q_format;
dfe5bb50	421	irq_ptr->qdr->ac = qdio_init->qdr_ac;
779e6e1c JG	422	irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
	423	irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
	424	irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */
	425	irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
	426	irq_ptr->qdr->qiba = (unsigned long)&irq_ptr->qib;
d1bf8590	427	irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4;
779e6e1c JG	428
	429	for (i = 0; i < qdio_init->no_input_qs; i++)
	430	__qdio_allocate_fill_qdr(irq_ptr, irq_ptr->input_qs, i, 0);
	431
	432	for (i = 0; i < qdio_init->no_output_qs; i++)
	433	__qdio_allocate_fill_qdr(irq_ptr, irq_ptr->output_qs, i,
	434	qdio_init->no_input_qs);
	435	}
	436
	437	static void setup_qib(struct qdio_irq *irq_ptr,
	438	struct qdio_initialize *init_data)
	439	{
	440	if (qebsm_possible())
	441	irq_ptr->qib.rflags \|= QIB_RFLAGS_ENABLE_QEBSM;
	442
dcc18f48 CS	443	irq_ptr->qib.rflags \|= init_data->qib_rflags;
dcc18f48 CS	444
779e6e1c JG	445	irq_ptr->qib.qfmt = init_data->q_format;
	446	if (init_data->no_input_qs)
	447	irq_ptr->qib.isliba =
	448	(unsigned long)(irq_ptr->input_qs[0]->slib);
	449	if (init_data->no_output_qs)
	450	irq_ptr->qib.osliba =
	451	(unsigned long)(irq_ptr->output_qs[0]->slib);
	452	memcpy(irq_ptr->qib.ebcnam, init_data->adapter_name, 8);
	453	}
	454
	455	int qdio_setup_irq(struct qdio_initialize *init_data)
	456	{
	457	struct ciw *ciw;
	458	struct qdio_irq *irq_ptr = init_data->cdev->private->qdio_data;
779e6e1c	459
432ac5e0 JG	460	memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
	461	memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag));
	462	memset(&irq_ptr->ccw, 0, sizeof(irq_ptr->ccw));
	463	memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc));
	464	memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
	465
	466	irq_ptr->debugfs_dev = irq_ptr->debugfs_perf = NULL;
	467	irq_ptr->sch_token = irq_ptr->state = irq_ptr->perf_stat_enabled = 0;
	468
779e6e1c JG	469	/* wipes qib.ac, required by ar7063 */
	470	memset(irq_ptr->qdr, 0, sizeof(struct qdr));
	471
	472	irq_ptr->int_parm = init_data->int_parm;
	473	irq_ptr->nr_input_qs = init_data->no_input_qs;
	474	irq_ptr->nr_output_qs = init_data->no_output_qs;
779e6e1c	475	irq_ptr->cdev = init_data->cdev;
313dc689	476	irq_ptr->scan_threshold = init_data->scan_threshold;
287a0933	477	ccw_device_get_schid(irq_ptr->cdev, &irq_ptr->schid);
779e6e1c JG	478	setup_queues(irq_ptr, init_data);
	479
	480	setup_qib(irq_ptr, init_data);
	481	qdio_setup_thinint(irq_ptr);
	482	set_impl_params(irq_ptr, init_data->qib_param_field_format,
	483	init_data->qib_param_field,
	484	init_data->input_slib_elements,
	485	init_data->output_slib_elements);
	486
	487	/* fill input and output descriptors */
	488	setup_qdr(irq_ptr, init_data);
	489
	490	/* qdr, qib, sls, slsbs, slibs, sbales are filled now */
	491
	492	/* get qdio commands */
	493	ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
	494	if (!ciw) {
22f99347	495	DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no);
2e68adcd	496	return -EINVAL;
779e6e1c JG	497	}
	498	irq_ptr->equeue = *ciw;
	499
	500	ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
	501	if (!ciw) {
22f99347	502	DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no);
2e68adcd	503	return -EINVAL;
779e6e1c JG	504	}
	505	irq_ptr->aqueue = *ciw;
	506
	507	/* set new interrupt handler */
7eee12b4	508	spin_lock_irq(get_ccwdev_lock(irq_ptr->cdev));
779e6e1c JG	509	irq_ptr->orig_handler = init_data->cdev->handler;
779e6e1c JG	510	init_data->cdev->handler = qdio_int_handler;
7eee12b4	511	spin_unlock_irq(get_ccwdev_lock(irq_ptr->cdev));
779e6e1c	512	return 0;
779e6e1c JG	513	}
	514
	515	void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
	516	struct ccw_device *cdev)
	517	{
	518	char s[80];
	519
22f99347	520	snprintf(s, 80, "qdio: %s %s on SC %x using "
6726a807	521	"AI:%d QEBSM:%d PRI:%d TDD:%d SIGA:%s%s%s%s%s\n",
22f99347 JG	522	dev_name(&cdev->dev),
	523	(irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
	524	((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
	525	irq_ptr->schid.sch_no,
	526	is_thinint_irq(irq_ptr),
	527	(irq_ptr->sch_token) ? 1 : 0,
f85b2b29	528	pci_out_supported(irq_ptr) ? 1 : 0,
22f99347 JG	529	css_general_characteristics.aif_tdd,
	530	(irq_ptr->siga_flag.input) ? "R" : " ",
	531	(irq_ptr->siga_flag.output) ? "W" : " ",
	532	(irq_ptr->siga_flag.sync) ? "S" : " ",
90adac58 JG	533	(irq_ptr->siga_flag.sync_after_ai) ? "A" : " ",
90adac58 JG	534	(irq_ptr->siga_flag.sync_out_after_pci) ? "P" : " ");
75f62761	535	printk(KERN_INFO "%s", s);
779e6e1c JG	536	}
779e6e1c JG	537
104ea556	538	int qdio_enable_async_operation(struct qdio_output_q *outq)
104ea556	539	{
6396bb22	540	outq->aobs = kcalloc(QDIO_MAX_BUFFERS_PER_Q, sizeof(struct qaob *),
104ea556	541	GFP_ATOMIC);
	542	if (!outq->aobs) {
	543	outq->use_cq = 0;
	544	return -ENOMEM;
	545	}
	546	outq->use_cq = 1;
	547	return 0;
	548	}
	549
	550	void qdio_disable_async_operation(struct qdio_output_q *q)
	551	{
	552	kfree(q->aobs);
	553	q->aobs = NULL;
	554	q->use_cq = 0;
	555	}
	556
779e6e1c JG	557	int __init qdio_setup_init(void)
779e6e1c JG	558	{
104ea556	559	int rc;
104ea556	560
779e6e1c JG	561	qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
	562	256, 0, NULL);
	563	if (!qdio_q_cache)
	564	return -ENOMEM;
	565
104ea556	566	qdio_aob_cache = kmem_cache_create("qdio_aob",
	567	sizeof(struct qaob),
	568	sizeof(struct qaob),
	569	0,
	570	NULL);
	571	if (!qdio_aob_cache) {
	572	rc = -ENOMEM;
	573	goto free_qdio_q_cache;
	574	}
	575
779e6e1c	576	/* Check for OSA/FCP thin interrupts (bit 67). */
22f99347 JG	577	DBF_EVENT("thinint:%1d",
22f99347 JG	578	(css_general_characteristics.aif_osa) ? 1 : 0);
779e6e1c JG	579
779e6e1c JG	580	/* Check for QEBSM support in general (bit 58). */
22f99347	581	DBF_EVENT("cssQEBSM:%1d", (qebsm_possible()) ? 1 : 0);
104ea556	582	rc = 0;
	583	out:
	584	return rc;
	585	free_qdio_q_cache:
	586	kmem_cache_destroy(qdio_q_cache);
	587	goto out;
779e6e1c JG	588	}
779e6e1c JG	589
3f1934bc	590	void qdio_setup_exit(void)
779e6e1c	591	{
104ea556	592	kmem_cache_destroy(qdio_aob_cache);
779e6e1c JG	593	kmem_cache_destroy(qdio_q_cache);
779e6e1c JG	594	}