--- /dev/null
+/*
+ * 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);
+}
+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,
+ QDIO_MAX_BUFFERS_PER_Q);
+
+ 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_alloc(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;
+ }
+ 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;
+}
+
+static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,
+ void **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;
+ void **input_sbal_array = qdio_init->input_sbal_addr_array;
+ void **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;
+ q->u.out.scan_threshold = qdio_init->scan_threshold;
+ 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);
+ setup_timer(&q->u.out.timer, (void(*)(unsigned long))
+ &qdio_outbound_timer, (unsigned long)q);
+ }
+}
+
+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;
+ int rc;
+
+ 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;
+ 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);
+ rc = -EINVAL;
+ goto out_err;
+ }
+ 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);
+ 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];
+
+ 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,
+ (irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED) ? 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 = kzalloc(sizeof(struct qaob *) * QDIO_MAX_BUFFERS_PER_Q,
+ 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);
+}
Code Review / kvmfornfv.git / blobdiff