779e6e1c72
List of major changes: - split qdio driver into several files - seperation of thin interrupt code - improved handling for multiple thin interrupt devices - inbound and outbound processing now always runs in tasklet context - significant less tasklet schedules per interrupt needed - merged qebsm with non-qebsm handling - cleanup qdio interface and added kerneldoc - coding style Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Utz Bacher <utz.bacher@de.ibm.com> Reviewed-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
522 lines
14 KiB
C
522 lines
14 KiB
C
/*
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* driver/s390/cio/qdio_setup.c
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*
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* qdio queue initialization
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*
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* Copyright (C) IBM Corp. 2008
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* Author(s): Jan Glauber <jang@linux.vnet.ibm.com>
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <asm/qdio.h>
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#include "cio.h"
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#include "css.h"
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#include "device.h"
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#include "ioasm.h"
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#include "chsc.h"
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#include "qdio.h"
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#include "qdio_debug.h"
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static struct kmem_cache *qdio_q_cache;
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/*
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* qebsm is only available under 64bit but the adapter sets the feature
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* flag anyway, so we manually override it.
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*/
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static inline int qebsm_possible(void)
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{
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#ifdef CONFIG_64BIT
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return css_general_characteristics.qebsm;
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#endif
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return 0;
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}
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/*
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* qib_param_field: pointer to 128 bytes or NULL, if no param field
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* nr_input_qs: pointer to nr_queues*128 words of data or NULL
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*/
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static void set_impl_params(struct qdio_irq *irq_ptr,
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unsigned int qib_param_field_format,
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unsigned char *qib_param_field,
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unsigned long *input_slib_elements,
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unsigned long *output_slib_elements)
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{
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struct qdio_q *q;
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int i, j;
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if (!irq_ptr)
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return;
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WARN_ON((unsigned long)&irq_ptr->qib & 0xff);
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irq_ptr->qib.pfmt = qib_param_field_format;
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if (qib_param_field)
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memcpy(irq_ptr->qib.parm, qib_param_field,
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QDIO_MAX_BUFFERS_PER_Q);
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if (!input_slib_elements)
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goto output;
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for_each_input_queue(irq_ptr, q, i) {
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for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
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q->slib->slibe[j].parms =
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input_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
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}
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output:
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if (!output_slib_elements)
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return;
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for_each_output_queue(irq_ptr, q, i) {
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for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
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q->slib->slibe[j].parms =
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output_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
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}
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}
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static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
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{
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struct qdio_q *q;
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int i;
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for (i = 0; i < nr_queues; i++) {
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q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
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if (!q)
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return -ENOMEM;
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WARN_ON((unsigned long)q & 0xff);
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q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
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if (!q->slib) {
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kmem_cache_free(qdio_q_cache, q);
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return -ENOMEM;
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}
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WARN_ON((unsigned long)q->slib & 0x7ff);
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irq_ptr_qs[i] = q;
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}
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return 0;
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}
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int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs)
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{
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int rc;
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rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
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if (rc)
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return rc;
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rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
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return rc;
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}
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static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr,
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qdio_handler_t *handler, int i)
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{
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/* must be cleared by every qdio_establish */
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memset(q, 0, ((char *)&q->slib) - ((char *)q));
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memset(q->slib, 0, PAGE_SIZE);
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q->irq_ptr = irq_ptr;
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q->mask = 1 << (31 - i);
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q->nr = i;
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q->handler = handler;
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}
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static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,
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void **sbals_array, char *dbf_text, int i)
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{
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struct qdio_q *prev;
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int j;
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QDIO_DBF_TEXT0(0, setup, dbf_text);
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QDIO_DBF_HEX0(0, setup, &q, sizeof(void *));
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q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2);
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/* fill in sbal */
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for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) {
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q->sbal[j] = *sbals_array++;
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WARN_ON((unsigned long)q->sbal[j] & 0xff);
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}
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/* fill in slib */
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if (i > 0) {
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prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
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: irq_ptr->output_qs[i - 1];
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prev->slib->nsliba = (unsigned long)q->slib;
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}
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q->slib->sla = (unsigned long)q->sl;
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q->slib->slsba = (unsigned long)&q->slsb.val[0];
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/* fill in sl */
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for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
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q->sl->element[j].sbal = (unsigned long)q->sbal[j];
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QDIO_DBF_TEXT2(0, setup, "sl-sb-b0");
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QDIO_DBF_HEX2(0, setup, q->sl, sizeof(void *));
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QDIO_DBF_HEX2(0, setup, &q->slsb, sizeof(void *));
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QDIO_DBF_HEX2(0, setup, q->sbal, sizeof(void *));
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}
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static void setup_queues(struct qdio_irq *irq_ptr,
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struct qdio_initialize *qdio_init)
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{
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char dbf_text[20];
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struct qdio_q *q;
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void **input_sbal_array = qdio_init->input_sbal_addr_array;
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void **output_sbal_array = qdio_init->output_sbal_addr_array;
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int i;
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sprintf(dbf_text, "qfqs%4x", qdio_init->cdev->private->schid.sch_no);
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QDIO_DBF_TEXT0(0, setup, dbf_text);
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for_each_input_queue(irq_ptr, q, i) {
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sprintf(dbf_text, "in-q%4x", i);
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setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);
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q->is_input_q = 1;
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spin_lock_init(&q->u.in.lock);
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setup_storage_lists(q, irq_ptr, input_sbal_array, dbf_text, i);
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input_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
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if (is_thinint_irq(irq_ptr))
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tasklet_init(&q->tasklet, tiqdio_inbound_processing,
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(unsigned long) q);
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else
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tasklet_init(&q->tasklet, qdio_inbound_processing,
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(unsigned long) q);
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}
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for_each_output_queue(irq_ptr, q, i) {
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sprintf(dbf_text, "outq%4x", i);
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setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);
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q->is_input_q = 0;
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setup_storage_lists(q, irq_ptr, output_sbal_array,
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dbf_text, i);
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output_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
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tasklet_init(&q->tasklet, qdio_outbound_processing,
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(unsigned long) q);
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setup_timer(&q->u.out.timer, (void(*)(unsigned long))
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&qdio_outbound_timer, (unsigned long)q);
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}
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}
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static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac)
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{
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if (qdioac & AC1_SIGA_INPUT_NEEDED)
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irq_ptr->siga_flag.input = 1;
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if (qdioac & AC1_SIGA_OUTPUT_NEEDED)
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irq_ptr->siga_flag.output = 1;
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if (qdioac & AC1_SIGA_SYNC_NEEDED)
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irq_ptr->siga_flag.sync = 1;
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if (qdioac & AC1_AUTOMATIC_SYNC_ON_THININT)
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irq_ptr->siga_flag.no_sync_ti = 1;
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if (qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI)
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irq_ptr->siga_flag.no_sync_out_pci = 1;
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if (irq_ptr->siga_flag.no_sync_out_pci &&
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irq_ptr->siga_flag.no_sync_ti)
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irq_ptr->siga_flag.no_sync_out_ti = 1;
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}
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static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
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unsigned char qdioac, unsigned long token)
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{
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char dbf_text[15];
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if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM))
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goto no_qebsm;
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if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) ||
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(!(qdioac & AC1_SC_QEBSM_ENABLED)))
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goto no_qebsm;
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irq_ptr->sch_token = token;
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QDIO_DBF_TEXT0(0, setup, "V=V:1");
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sprintf(dbf_text, "%8lx", irq_ptr->sch_token);
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QDIO_DBF_TEXT0(0, setup, dbf_text);
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return;
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no_qebsm:
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irq_ptr->sch_token = 0;
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irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
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QDIO_DBF_TEXT0(0, setup, "noV=V");
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}
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static int __get_ssqd_info(struct qdio_irq *irq_ptr)
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{
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struct chsc_ssqd_area *ssqd;
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int rc;
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QDIO_DBF_TEXT0(0, setup, "getssqd");
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ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
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memset(ssqd, 0, PAGE_SIZE);
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ssqd->request = (struct chsc_header) {
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.length = 0x0010,
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.code = 0x0024,
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};
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ssqd->first_sch = irq_ptr->schid.sch_no;
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ssqd->last_sch = irq_ptr->schid.sch_no;
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ssqd->ssid = irq_ptr->schid.ssid;
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if (chsc(ssqd))
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return -EIO;
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rc = chsc_error_from_response(ssqd->response.code);
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if (rc)
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return rc;
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if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) ||
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!(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) ||
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(ssqd->qdio_ssqd.sch != irq_ptr->schid.sch_no))
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return -EINVAL;
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memcpy(&irq_ptr->ssqd_desc, &ssqd->qdio_ssqd,
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sizeof(struct qdio_ssqd_desc));
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return 0;
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}
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void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
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{
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unsigned char qdioac;
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char dbf_text[15];
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int rc;
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rc = __get_ssqd_info(irq_ptr);
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if (rc) {
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QDIO_DBF_TEXT2(0, setup, "ssqdasig");
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sprintf(dbf_text, "schno%x", irq_ptr->schid.sch_no);
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QDIO_DBF_TEXT2(0, setup, dbf_text);
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sprintf(dbf_text, "rc:%d", rc);
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QDIO_DBF_TEXT2(0, setup, dbf_text);
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/* all flags set, worst case */
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qdioac = AC1_SIGA_INPUT_NEEDED | AC1_SIGA_OUTPUT_NEEDED |
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AC1_SIGA_SYNC_NEEDED;
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} else
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qdioac = irq_ptr->ssqd_desc.qdioac1;
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check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token);
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process_ac_flags(irq_ptr, qdioac);
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sprintf(dbf_text, "qdioac%2x", qdioac);
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QDIO_DBF_TEXT2(0, setup, dbf_text);
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}
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void qdio_release_memory(struct qdio_irq *irq_ptr)
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{
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struct qdio_q *q;
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int i;
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/*
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* Must check queue array manually since irq_ptr->nr_input_queues /
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* irq_ptr->nr_input_queues may not yet be set.
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*/
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for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
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q = irq_ptr->input_qs[i];
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if (q) {
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free_page((unsigned long) q->slib);
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kmem_cache_free(qdio_q_cache, q);
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}
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}
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for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
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q = irq_ptr->output_qs[i];
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if (q) {
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free_page((unsigned long) q->slib);
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kmem_cache_free(qdio_q_cache, q);
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}
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}
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kfree(irq_ptr->qdr);
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free_page(irq_ptr->chsc_page);
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free_page((unsigned long) irq_ptr);
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}
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static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr,
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struct qdio_q **irq_ptr_qs,
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int i, int nr)
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{
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irq_ptr->qdr->qdf0[i + nr].sliba =
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(unsigned long)irq_ptr_qs[i]->slib;
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irq_ptr->qdr->qdf0[i + nr].sla =
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(unsigned long)irq_ptr_qs[i]->sl;
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irq_ptr->qdr->qdf0[i + nr].slsba =
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(unsigned long)&irq_ptr_qs[i]->slsb.val[0];
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irq_ptr->qdr->qdf0[i + nr].akey = PAGE_DEFAULT_KEY;
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irq_ptr->qdr->qdf0[i + nr].bkey = PAGE_DEFAULT_KEY;
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irq_ptr->qdr->qdf0[i + nr].ckey = PAGE_DEFAULT_KEY;
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irq_ptr->qdr->qdf0[i + nr].dkey = PAGE_DEFAULT_KEY;
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}
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static void setup_qdr(struct qdio_irq *irq_ptr,
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struct qdio_initialize *qdio_init)
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{
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int i;
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irq_ptr->qdr->qfmt = qdio_init->q_format;
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irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
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irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
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irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */
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irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
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irq_ptr->qdr->qiba = (unsigned long)&irq_ptr->qib;
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irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY;
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for (i = 0; i < qdio_init->no_input_qs; i++)
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__qdio_allocate_fill_qdr(irq_ptr, irq_ptr->input_qs, i, 0);
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for (i = 0; i < qdio_init->no_output_qs; i++)
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__qdio_allocate_fill_qdr(irq_ptr, irq_ptr->output_qs, i,
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qdio_init->no_input_qs);
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}
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static void setup_qib(struct qdio_irq *irq_ptr,
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struct qdio_initialize *init_data)
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{
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if (qebsm_possible())
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irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
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irq_ptr->qib.qfmt = init_data->q_format;
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if (init_data->no_input_qs)
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irq_ptr->qib.isliba =
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(unsigned long)(irq_ptr->input_qs[0]->slib);
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if (init_data->no_output_qs)
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irq_ptr->qib.osliba =
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(unsigned long)(irq_ptr->output_qs[0]->slib);
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memcpy(irq_ptr->qib.ebcnam, init_data->adapter_name, 8);
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}
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int qdio_setup_irq(struct qdio_initialize *init_data)
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{
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struct ciw *ciw;
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struct qdio_irq *irq_ptr = init_data->cdev->private->qdio_data;
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int rc;
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memset(irq_ptr, 0, ((char *)&irq_ptr->qdr) - ((char *)irq_ptr));
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/* wipes qib.ac, required by ar7063 */
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memset(irq_ptr->qdr, 0, sizeof(struct qdr));
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irq_ptr->int_parm = init_data->int_parm;
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irq_ptr->nr_input_qs = init_data->no_input_qs;
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irq_ptr->nr_output_qs = init_data->no_output_qs;
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irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
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irq_ptr->cdev = init_data->cdev;
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setup_queues(irq_ptr, init_data);
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setup_qib(irq_ptr, init_data);
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qdio_setup_thinint(irq_ptr);
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set_impl_params(irq_ptr, init_data->qib_param_field_format,
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init_data->qib_param_field,
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init_data->input_slib_elements,
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init_data->output_slib_elements);
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/* fill input and output descriptors */
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setup_qdr(irq_ptr, init_data);
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/* qdr, qib, sls, slsbs, slibs, sbales are filled now */
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/* get qdio commands */
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ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
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if (!ciw) {
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QDIO_DBF_TEXT2(1, setup, "no eq");
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rc = -EINVAL;
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goto out_err;
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}
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irq_ptr->equeue = *ciw;
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ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
|
|
if (!ciw) {
|
|
QDIO_DBF_TEXT2(1, setup, "no aq");
|
|
rc = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
irq_ptr->aqueue = *ciw;
|
|
|
|
/* set new interrupt handler */
|
|
irq_ptr->orig_handler = init_data->cdev->handler;
|
|
init_data->cdev->handler = qdio_int_handler;
|
|
return 0;
|
|
out_err:
|
|
qdio_release_memory(irq_ptr);
|
|
return rc;
|
|
}
|
|
|
|
void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
|
|
struct ccw_device *cdev)
|
|
{
|
|
char s[80];
|
|
|
|
sprintf(s, "%s ", cdev->dev.bus_id);
|
|
|
|
switch (irq_ptr->qib.qfmt) {
|
|
case QDIO_QETH_QFMT:
|
|
sprintf(s + strlen(s), "OSADE ");
|
|
break;
|
|
case QDIO_ZFCP_QFMT:
|
|
sprintf(s + strlen(s), "ZFCP ");
|
|
break;
|
|
case QDIO_IQDIO_QFMT:
|
|
sprintf(s + strlen(s), "HiperSockets ");
|
|
break;
|
|
}
|
|
sprintf(s + strlen(s), "using: ");
|
|
|
|
if (!is_thinint_irq(irq_ptr))
|
|
sprintf(s + strlen(s), "no");
|
|
sprintf(s + strlen(s), "AdapterInterrupts ");
|
|
if (!(irq_ptr->sch_token != 0))
|
|
sprintf(s + strlen(s), "no");
|
|
sprintf(s + strlen(s), "QEBSM ");
|
|
if (!(irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED))
|
|
sprintf(s + strlen(s), "no");
|
|
sprintf(s + strlen(s), "OutboundPCI ");
|
|
if (!css_general_characteristics.aif_tdd)
|
|
sprintf(s + strlen(s), "no");
|
|
sprintf(s + strlen(s), "TDD\n");
|
|
printk(KERN_INFO "qdio: %s", s);
|
|
|
|
memset(s, 0, sizeof(s));
|
|
sprintf(s, "%s SIGA required: ", cdev->dev.bus_id);
|
|
if (irq_ptr->siga_flag.input)
|
|
sprintf(s + strlen(s), "Read ");
|
|
if (irq_ptr->siga_flag.output)
|
|
sprintf(s + strlen(s), "Write ");
|
|
if (irq_ptr->siga_flag.sync)
|
|
sprintf(s + strlen(s), "Sync ");
|
|
if (!irq_ptr->siga_flag.no_sync_ti)
|
|
sprintf(s + strlen(s), "SyncAI ");
|
|
if (!irq_ptr->siga_flag.no_sync_out_ti)
|
|
sprintf(s + strlen(s), "SyncOutAI ");
|
|
if (!irq_ptr->siga_flag.no_sync_out_pci)
|
|
sprintf(s + strlen(s), "SyncOutPCI");
|
|
sprintf(s + strlen(s), "\n");
|
|
printk(KERN_INFO "qdio: %s", s);
|
|
}
|
|
|
|
int __init qdio_setup_init(void)
|
|
{
|
|
char dbf_text[15];
|
|
|
|
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). */
|
|
sprintf(dbf_text, "thini%1x",
|
|
(css_general_characteristics.aif_osa) ? 1 : 0);
|
|
QDIO_DBF_TEXT0(0, setup, dbf_text);
|
|
|
|
/* Check for QEBSM support in general (bit 58). */
|
|
sprintf(dbf_text, "cssQBS:%1x",
|
|
(qebsm_possible()) ? 1 : 0);
|
|
QDIO_DBF_TEXT0(0, setup, dbf_text);
|
|
return 0;
|
|
}
|
|
|
|
void __exit qdio_setup_exit(void)
|
|
{
|
|
kmem_cache_destroy(qdio_q_cache);
|
|
}
|