Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Jan Glauber | 1408 | 60.85% | 7 | 12.07% |
Julian Wiedmann | 367 | 15.86% | 23 | 39.66% |
Sebastian Ott | 275 | 11.88% | 4 | 6.90% |
Martin Schwidefsky | 96 | 4.15% | 9 | 15.52% |
Frank Blaschka | 78 | 3.37% | 2 | 3.45% |
Heiko Carstens | 44 | 1.90% | 4 | 6.90% |
Swen Schillig | 17 | 0.73% | 2 | 3.45% |
Maxim Shchetynin | 9 | 0.39% | 1 | 1.72% |
Christof Schmitt | 8 | 0.35% | 2 | 3.45% |
Andreas Herrmann | 7 | 0.30% | 1 | 1.72% |
Peter Oberparleiter | 3 | 0.13% | 1 | 1.72% |
Greg Kroah-Hartman | 1 | 0.04% | 1 | 1.72% |
Cornelia Huck | 1 | 0.04% | 1 | 1.72% |
Total | 2314 | 58 |
// SPDX-License-Identifier: GPL-2.0 /* * qdio queue initialization * * Copyright IBM Corp. 2008 * Author(s): Jan Glauber <jang@linux.vnet.ibm.com> */ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/export.h> #include <linux/io.h> #include <asm/ebcdic.h> #include <asm/qdio.h> #include "cio.h" #include "css.h" #include "device.h" #include "ioasm.h" #include "chsc.h" #include "qdio.h" #include "qdio_debug.h" #define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer)) static struct kmem_cache *qdio_q_cache; /** * qdio_free_buffers() - free qdio buffers * @buf: array of pointers to qdio buffers * @count: number of qdio buffers to free */ void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count) { int pos; for (pos = 0; pos < count; pos += QBUFF_PER_PAGE) free_page((unsigned long) buf[pos]); } EXPORT_SYMBOL_GPL(qdio_free_buffers); /** * qdio_alloc_buffers() - allocate qdio buffers * @buf: array of pointers to qdio buffers * @count: number of qdio buffers to allocate */ int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count) { int pos; for (pos = 0; pos < count; pos += QBUFF_PER_PAGE) { buf[pos] = (void *) get_zeroed_page(GFP_KERNEL); if (!buf[pos]) { qdio_free_buffers(buf, count); return -ENOMEM; } } for (pos = 0; pos < count; pos++) if (pos % QBUFF_PER_PAGE) buf[pos] = buf[pos - 1] + 1; return 0; } EXPORT_SYMBOL_GPL(qdio_alloc_buffers); /** * qdio_reset_buffers() - reset qdio buffers * @buf: array of pointers to qdio buffers * @count: number of qdio buffers that will be zeroed */ void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count) { int pos; for (pos = 0; pos < count; pos++) memset(buf[pos], 0, sizeof(struct qdio_buffer)); } EXPORT_SYMBOL_GPL(qdio_reset_buffers); static void __qdio_free_queues(struct qdio_q **queues, unsigned int count) { struct qdio_q *q; unsigned int i; for (i = 0; i < count; i++) { q = queues[i]; free_page((unsigned long) q->slib); kmem_cache_free(qdio_q_cache, q); } } void qdio_free_queues(struct qdio_irq *irq_ptr) { __qdio_free_queues(irq_ptr->input_qs, irq_ptr->max_input_qs); irq_ptr->max_input_qs = 0; __qdio_free_queues(irq_ptr->output_qs, irq_ptr->max_output_qs); irq_ptr->max_output_qs = 0; } static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues) { struct qdio_q *q; int i; for (i = 0; i < nr_queues; i++) { q = kmem_cache_zalloc(qdio_q_cache, GFP_KERNEL); if (!q) { __qdio_free_queues(irq_ptr_qs, i); return -ENOMEM; } q->slib = (struct slib *) __get_free_page(GFP_KERNEL); if (!q->slib) { kmem_cache_free(qdio_q_cache, q); __qdio_free_queues(irq_ptr_qs, i); return -ENOMEM; } irq_ptr_qs[i] = q; } return 0; } int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs) { int rc; rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs); if (rc) return rc; rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs); if (rc) { __qdio_free_queues(irq_ptr->input_qs, nr_input_qs); return rc; } irq_ptr->max_input_qs = nr_input_qs; irq_ptr->max_output_qs = nr_output_qs; return 0; } static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr, qdio_handler_t *handler, int i) { struct slib *slib = q->slib; /* queue must be cleared for qdio_establish */ memset(q, 0, sizeof(*q)); memset(slib, 0, PAGE_SIZE); q->slib = slib; q->irq_ptr = irq_ptr; q->mask = 1 << (31 - i); q->nr = i; q->handler = handler; } static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr, struct qdio_buffer **sbals_array, int i) { struct qdio_q *prev; int j; DBF_HEX(&q, sizeof(void *)); q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2); /* fill in sbal */ for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) q->sbal[j] = *sbals_array++; /* fill in slib */ if (i > 0) { prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1] : irq_ptr->output_qs[i - 1]; prev->slib->nsliba = (unsigned long)q->slib; } q->slib->sla = (unsigned long)q->sl; q->slib->slsba = (unsigned long)&q->slsb.val[0]; /* fill in sl */ for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) q->sl->element[j].sbal = virt_to_phys(q->sbal[j]); } static void setup_queues(struct qdio_irq *irq_ptr, struct qdio_initialize *qdio_init) { struct qdio_q *q; int i; for_each_input_queue(irq_ptr, q, i) { DBF_EVENT("inq:%1d", i); setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i); q->is_input_q = 1; setup_storage_lists(q, irq_ptr, qdio_init->input_sbal_addr_array[i], i); } for_each_output_queue(irq_ptr, q, i) { DBF_EVENT("outq:%1d", i); setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i); q->is_input_q = 0; setup_storage_lists(q, irq_ptr, qdio_init->output_sbal_addr_array[i], i); } } static void check_and_setup_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac, unsigned long token) { if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM)) goto no_qebsm; if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) || (!(qdioac & AC1_SC_QEBSM_ENABLED))) goto no_qebsm; irq_ptr->sch_token = token; DBF_EVENT("V=V:1"); DBF_EVENT("%8lx", irq_ptr->sch_token); return; no_qebsm: irq_ptr->sch_token = 0; irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM; DBF_EVENT("noV=V"); } /* * If there is a qdio_irq we use the chsc_page and store the information * in the qdio_irq, otherwise we copy it to the specified structure. */ int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr, struct subchannel_id *schid, struct qdio_ssqd_desc *data) { struct chsc_ssqd_area *ssqd; int rc; DBF_EVENT("getssqd:%4x", schid->sch_no); if (!irq_ptr) { ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL); if (!ssqd) return -ENOMEM; } else { ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page; } rc = chsc_ssqd(*schid, ssqd); if (rc) goto out; if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) || !(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) || (ssqd->qdio_ssqd.sch != schid->sch_no)) rc = -EINVAL; if (!rc) memcpy(data, &ssqd->qdio_ssqd, sizeof(*data)); out: if (!irq_ptr) free_page((unsigned long)ssqd); return rc; } void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr) { unsigned char qdioac; int rc; rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, &irq_ptr->ssqd_desc); if (rc) { DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no); DBF_ERROR("rc:%x", rc); /* all flags set, worst case */ qdioac = AC1_SIGA_INPUT_NEEDED | AC1_SIGA_OUTPUT_NEEDED | AC1_SIGA_SYNC_NEEDED; } else qdioac = irq_ptr->ssqd_desc.qdioac1; check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token); irq_ptr->qdioac1 = qdioac; DBF_EVENT("ac 1:%2x 2:%4x", qdioac, irq_ptr->ssqd_desc.qdioac2); DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac); } static void qdio_fill_qdr_desc(struct qdesfmt0 *desc, struct qdio_q *queue) { desc->sliba = virt_to_phys(queue->slib); desc->sla = virt_to_phys(queue->sl); desc->slsba = virt_to_phys(&queue->slsb); desc->akey = PAGE_DEFAULT_KEY >> 4; desc->bkey = PAGE_DEFAULT_KEY >> 4; desc->ckey = PAGE_DEFAULT_KEY >> 4; desc->dkey = PAGE_DEFAULT_KEY >> 4; } static void setup_qdr(struct qdio_irq *irq_ptr, struct qdio_initialize *qdio_init) { struct qdesfmt0 *desc = &irq_ptr->qdr->qdf0[0]; int i; memset(irq_ptr->qdr, 0, sizeof(struct qdr)); irq_ptr->qdr->qfmt = qdio_init->q_format; irq_ptr->qdr->ac = qdio_init->qdr_ac; irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs; irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs; irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */ irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4; irq_ptr->qdr->qiba = virt_to_phys(&irq_ptr->qib); irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4; for (i = 0; i < qdio_init->no_input_qs; i++) qdio_fill_qdr_desc(desc++, irq_ptr->input_qs[i]); for (i = 0; i < qdio_init->no_output_qs; i++) qdio_fill_qdr_desc(desc++, irq_ptr->output_qs[i]); } static void setup_qib(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data) { memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib)); irq_ptr->qib.qfmt = init_data->q_format; irq_ptr->qib.pfmt = init_data->qib_param_field_format; irq_ptr->qib.rflags = init_data->qib_rflags; if (css_general_characteristics.qebsm) irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM; if (init_data->no_input_qs) irq_ptr->qib.isliba = (unsigned long)(irq_ptr->input_qs[0]->slib); if (init_data->no_output_qs) irq_ptr->qib.osliba = (unsigned long)(irq_ptr->output_qs[0]->slib); memcpy(irq_ptr->qib.ebcnam, dev_name(&irq_ptr->cdev->dev), 8); ASCEBC(irq_ptr->qib.ebcnam, 8); if (init_data->qib_param_field) memcpy(irq_ptr->qib.parm, init_data->qib_param_field, sizeof(irq_ptr->qib.parm)); } void qdio_setup_irq(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data) { struct ccw_device *cdev = irq_ptr->cdev; irq_ptr->qdioac1 = 0; memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc)); memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat)); irq_ptr->debugfs_dev = NULL; irq_ptr->sch_token = irq_ptr->perf_stat_enabled = 0; irq_ptr->state = QDIO_IRQ_STATE_INACTIVE; irq_ptr->error_handler = init_data->input_handler; irq_ptr->int_parm = init_data->int_parm; irq_ptr->nr_input_qs = init_data->no_input_qs; irq_ptr->nr_output_qs = init_data->no_output_qs; ccw_device_get_schid(cdev, &irq_ptr->schid); setup_queues(irq_ptr, init_data); irq_ptr->irq_poll = init_data->irq_poll; set_bit(QDIO_IRQ_DISABLED, &irq_ptr->poll_state); setup_qib(irq_ptr, init_data); /* fill input and output descriptors */ setup_qdr(irq_ptr, init_data); /* qdr, qib, sls, slsbs, slibs, sbales are filled now */ /* set our IRQ handler */ spin_lock_irq(get_ccwdev_lock(cdev)); irq_ptr->orig_handler = cdev->handler; cdev->handler = qdio_int_handler; spin_unlock_irq(get_ccwdev_lock(cdev)); } void qdio_shutdown_irq(struct qdio_irq *irq) { struct ccw_device *cdev = irq->cdev; /* restore IRQ handler */ spin_lock_irq(get_ccwdev_lock(cdev)); cdev->handler = irq->orig_handler; cdev->private->intparm = 0; spin_unlock_irq(get_ccwdev_lock(cdev)); } void qdio_print_subchannel_info(struct qdio_irq *irq_ptr) { dev_info(&irq_ptr->cdev->dev, "qdio: %s on SC %x using AI:%d QEBSM:%d PRI:%d TDD:%d SIGA:%s%s%s\n", (irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" : ((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"), irq_ptr->schid.sch_no, is_thinint_irq(irq_ptr), (irq_ptr->sch_token) ? 1 : 0, pci_out_supported(irq_ptr) ? 1 : 0, css_general_characteristics.aif_tdd, qdio_need_siga_in(irq_ptr) ? "R" : " ", qdio_need_siga_out(irq_ptr) ? "W" : " ", qdio_need_siga_sync(irq_ptr) ? "S" : " "); } int __init qdio_setup_init(void) { qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q), 256, 0, NULL); if (!qdio_q_cache) return -ENOMEM; /* Check for OSA/FCP thin interrupts (bit 67). */ DBF_EVENT("thinint:%1d", (css_general_characteristics.aif_osa) ? 1 : 0); /* Check for QEBSM support in general (bit 58). */ DBF_EVENT("cssQEBSM:%1d", css_general_characteristics.qebsm); return 0; } void qdio_setup_exit(void) { kmem_cache_destroy(qdio_q_cache); }
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