1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright IBM Corp. 2012
6 * Jan Glauber <jang@linux.vnet.ibm.com>
8 * The System z PCI code is a rewrite from a prototype by
9 * the following people (Kudoz!):
19 #define KMSG_COMPONENT "zpci"
20 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
22 #include <linux/kernel.h>
23 #include <linux/slab.h>
24 #include <linux/err.h>
25 #include <linux/export.h>
26 #include <linux/delay.h>
27 #include <linux/irq.h>
28 #include <linux/kernel_stat.h>
29 #include <linux/seq_file.h>
30 #include <linux/pci.h>
31 #include <linux/msi.h>
35 #include <asm/facility.h>
36 #include <asm/pci_insn.h>
37 #include <asm/pci_clp.h>
38 #include <asm/pci_dma.h>
40 #define DEBUG /* enable pr_debug */
42 #define SIC_IRQ_MODE_ALL 0
43 #define SIC_IRQ_MODE_SINGLE 1
45 #define ZPCI_NR_DMA_SPACES 1
46 #define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS
48 /* list of all detected zpci devices */
49 static LIST_HEAD(zpci_list);
50 static DEFINE_SPINLOCK(zpci_list_lock);
52 static struct irq_chip zpci_irq_chip = {
54 .irq_unmask = pci_msi_unmask_irq,
55 .irq_mask = pci_msi_mask_irq,
58 static DECLARE_BITMAP(zpci_domain, ZPCI_NR_DEVICES);
59 static DEFINE_SPINLOCK(zpci_domain_lock);
61 static struct airq_iv *zpci_aisb_iv;
62 static struct airq_iv *zpci_aibv[ZPCI_NR_DEVICES];
64 #define ZPCI_IOMAP_ENTRIES \
65 min(((unsigned long) ZPCI_NR_DEVICES * PCI_BAR_COUNT / 2), \
66 ZPCI_IOMAP_MAX_ENTRIES)
68 static DEFINE_SPINLOCK(zpci_iomap_lock);
69 static unsigned long *zpci_iomap_bitmap;
70 struct zpci_iomap_entry *zpci_iomap_start;
71 EXPORT_SYMBOL_GPL(zpci_iomap_start);
73 static struct kmem_cache *zdev_fmb_cache;
75 struct zpci_dev *get_zdev_by_fid(u32 fid)
77 struct zpci_dev *tmp, *zdev = NULL;
79 spin_lock(&zpci_list_lock);
80 list_for_each_entry(tmp, &zpci_list, entry) {
81 if (tmp->fid == fid) {
86 spin_unlock(&zpci_list_lock);
90 void zpci_remove_reserved_devices(void)
92 struct zpci_dev *tmp, *zdev;
93 enum zpci_state state;
96 spin_lock(&zpci_list_lock);
97 list_for_each_entry_safe(zdev, tmp, &zpci_list, entry) {
98 if (zdev->state == ZPCI_FN_STATE_STANDBY &&
99 !clp_get_state(zdev->fid, &state) &&
100 state == ZPCI_FN_STATE_RESERVED)
101 list_move_tail(&zdev->entry, &remove);
103 spin_unlock(&zpci_list_lock);
105 list_for_each_entry_safe(zdev, tmp, &remove, entry)
106 zpci_remove_device(zdev);
109 static struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus)
111 return (bus && bus->sysdata) ? (struct zpci_dev *) bus->sysdata : NULL;
114 int pci_domain_nr(struct pci_bus *bus)
116 return ((struct zpci_dev *) bus->sysdata)->domain;
118 EXPORT_SYMBOL_GPL(pci_domain_nr);
120 int pci_proc_domain(struct pci_bus *bus)
122 return pci_domain_nr(bus);
124 EXPORT_SYMBOL_GPL(pci_proc_domain);
126 /* Modify PCI: Register adapter interruptions */
127 static int zpci_set_airq(struct zpci_dev *zdev)
129 u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_REG_INT);
130 struct zpci_fib fib = {0};
134 fib.sum = 1; /* enable summary notifications */
135 fib.noi = airq_iv_end(zdev->aibv);
136 fib.aibv = (unsigned long) zdev->aibv->vector;
137 fib.aibvo = 0; /* each zdev has its own interrupt vector */
138 fib.aisb = (unsigned long) zpci_aisb_iv->vector + (zdev->aisb/64)*8;
139 fib.aisbo = zdev->aisb & 63;
141 return zpci_mod_fc(req, &fib, &status) ? -EIO : 0;
144 /* Modify PCI: Unregister adapter interruptions */
145 static int zpci_clear_airq(struct zpci_dev *zdev)
147 u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_DEREG_INT);
148 struct zpci_fib fib = {0};
151 cc = zpci_mod_fc(req, &fib, &status);
152 if (cc == 3 || (cc == 1 && status == 24))
153 /* Function already gone or IRQs already deregistered. */
156 return cc ? -EIO : 0;
159 /* Modify PCI: Register I/O address translation parameters */
160 int zpci_register_ioat(struct zpci_dev *zdev, u8 dmaas,
161 u64 base, u64 limit, u64 iota)
163 u64 req = ZPCI_CREATE_REQ(zdev->fh, dmaas, ZPCI_MOD_FC_REG_IOAT);
164 struct zpci_fib fib = {0};
167 WARN_ON_ONCE(iota & 0x3fff);
170 fib.iota = iota | ZPCI_IOTA_RTTO_FLAG;
171 return zpci_mod_fc(req, &fib, &status) ? -EIO : 0;
174 /* Modify PCI: Unregister I/O address translation parameters */
175 int zpci_unregister_ioat(struct zpci_dev *zdev, u8 dmaas)
177 u64 req = ZPCI_CREATE_REQ(zdev->fh, dmaas, ZPCI_MOD_FC_DEREG_IOAT);
178 struct zpci_fib fib = {0};
181 cc = zpci_mod_fc(req, &fib, &status);
182 if (cc == 3) /* Function already gone. */
184 return cc ? -EIO : 0;
187 /* Modify PCI: Set PCI function measurement parameters */
188 int zpci_fmb_enable_device(struct zpci_dev *zdev)
190 u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_SET_MEASURE);
191 struct zpci_fib fib = {0};
194 if (zdev->fmb || sizeof(*zdev->fmb) < zdev->fmb_length)
197 zdev->fmb = kmem_cache_zalloc(zdev_fmb_cache, GFP_KERNEL);
200 WARN_ON((u64) zdev->fmb & 0xf);
202 /* reset software counters */
203 atomic64_set(&zdev->allocated_pages, 0);
204 atomic64_set(&zdev->mapped_pages, 0);
205 atomic64_set(&zdev->unmapped_pages, 0);
207 fib.fmb_addr = virt_to_phys(zdev->fmb);
208 cc = zpci_mod_fc(req, &fib, &status);
210 kmem_cache_free(zdev_fmb_cache, zdev->fmb);
213 return cc ? -EIO : 0;
216 /* Modify PCI: Disable PCI function measurement */
217 int zpci_fmb_disable_device(struct zpci_dev *zdev)
219 u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_SET_MEASURE);
220 struct zpci_fib fib = {0};
226 /* Function measurement is disabled if fmb address is zero */
227 cc = zpci_mod_fc(req, &fib, &status);
228 if (cc == 3) /* Function already gone. */
232 kmem_cache_free(zdev_fmb_cache, zdev->fmb);
235 return cc ? -EIO : 0;
238 static int zpci_cfg_load(struct zpci_dev *zdev, int offset, u32 *val, u8 len)
240 u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
244 rc = zpci_load(&data, req, offset);
246 data = le64_to_cpu((__force __le64) data);
247 data >>= (8 - len) * 8;
254 static int zpci_cfg_store(struct zpci_dev *zdev, int offset, u32 val, u8 len)
256 u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
260 data <<= (8 - len) * 8;
261 data = (__force u64) cpu_to_le64(data);
262 rc = zpci_store(data, req, offset);
266 resource_size_t pcibios_align_resource(void *data, const struct resource *res,
267 resource_size_t size,
268 resource_size_t align)
273 /* combine single writes by using store-block insn */
274 void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
276 zpci_memcpy_toio(to, from, count);
279 /* Create a virtual mapping cookie for a PCI BAR */
280 void __iomem *pci_iomap_range(struct pci_dev *pdev,
282 unsigned long offset,
285 struct zpci_dev *zdev = to_zpci(pdev);
288 if (!pci_resource_len(pdev, bar))
291 idx = zdev->bars[bar].map_idx;
292 spin_lock(&zpci_iomap_lock);
294 WARN_ON(!++zpci_iomap_start[idx].count);
295 zpci_iomap_start[idx].fh = zdev->fh;
296 zpci_iomap_start[idx].bar = bar;
297 spin_unlock(&zpci_iomap_lock);
299 return (void __iomem *) ZPCI_ADDR(idx) + offset;
301 EXPORT_SYMBOL(pci_iomap_range);
303 void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
305 return pci_iomap_range(dev, bar, 0, maxlen);
307 EXPORT_SYMBOL(pci_iomap);
309 void pci_iounmap(struct pci_dev *pdev, void __iomem *addr)
311 unsigned int idx = ZPCI_IDX(addr);
313 spin_lock(&zpci_iomap_lock);
314 /* Detect underrun */
315 WARN_ON(!zpci_iomap_start[idx].count);
316 if (!--zpci_iomap_start[idx].count) {
317 zpci_iomap_start[idx].fh = 0;
318 zpci_iomap_start[idx].bar = 0;
320 spin_unlock(&zpci_iomap_lock);
322 EXPORT_SYMBOL(pci_iounmap);
324 static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
327 struct zpci_dev *zdev = get_zdev_by_bus(bus);
330 if (!zdev || devfn != ZPCI_DEVFN)
333 ret = zpci_cfg_load(zdev, where, val, size);
338 static int pci_write(struct pci_bus *bus, unsigned int devfn, int where,
341 struct zpci_dev *zdev = get_zdev_by_bus(bus);
344 if (!zdev || devfn != ZPCI_DEVFN)
347 ret = zpci_cfg_store(zdev, where, val, size);
352 static struct pci_ops pci_root_ops = {
357 static void zpci_irq_handler(struct airq_struct *airq)
359 unsigned long si, ai;
360 struct airq_iv *aibv;
363 inc_irq_stat(IRQIO_PCI);
365 /* Scan adapter summary indicator bit vector */
366 si = airq_iv_scan(zpci_aisb_iv, si, airq_iv_end(zpci_aisb_iv));
369 /* End of second scan with interrupts on. */
371 /* First scan complete, reenable interrupts. */
372 if (zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC))
378 /* Scan the adapter interrupt vector for this device. */
379 aibv = zpci_aibv[si];
381 ai = airq_iv_scan(aibv, ai, airq_iv_end(aibv));
384 inc_irq_stat(IRQIO_MSI);
385 airq_iv_lock(aibv, ai);
386 generic_handle_irq(airq_iv_get_data(aibv, ai));
387 airq_iv_unlock(aibv, ai);
392 int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
394 struct zpci_dev *zdev = to_zpci(pdev);
395 unsigned int hwirq, msi_vecs;
397 struct msi_desc *msi;
402 if (type == PCI_CAP_ID_MSI && nvec > 1)
404 msi_vecs = min_t(unsigned int, nvec, zdev->max_msi);
406 /* Allocate adapter summary indicator bit */
407 aisb = airq_iv_alloc_bit(zpci_aisb_iv);
412 /* Create adapter interrupt vector */
413 zdev->aibv = airq_iv_create(msi_vecs, AIRQ_IV_DATA | AIRQ_IV_BITLOCK);
417 /* Wire up shortcut pointer */
418 zpci_aibv[aisb] = zdev->aibv;
420 /* Request MSI interrupts */
422 for_each_pci_msi_entry(msi, pdev) {
423 if (hwirq >= msi_vecs)
425 irq = irq_alloc_desc(0); /* Alloc irq on node 0 */
428 rc = irq_set_msi_desc(irq, msi);
431 irq_set_chip_and_handler(irq, &zpci_irq_chip,
434 msg.address_lo = zdev->msi_addr & 0xffffffff;
435 msg.address_hi = zdev->msi_addr >> 32;
436 pci_write_msi_msg(irq, &msg);
437 airq_iv_set_data(zdev->aibv, hwirq, irq);
441 /* Enable adapter interrupts */
442 rc = zpci_set_airq(zdev);
446 return (msi_vecs == nvec) ? 0 : msi_vecs;
449 void arch_teardown_msi_irqs(struct pci_dev *pdev)
451 struct zpci_dev *zdev = to_zpci(pdev);
452 struct msi_desc *msi;
455 /* Disable adapter interrupts */
456 rc = zpci_clear_airq(zdev);
460 /* Release MSI interrupts */
461 for_each_pci_msi_entry(msi, pdev) {
464 if (msi->msi_attrib.is_msix)
465 __pci_msix_desc_mask_irq(msi, 1);
467 __pci_msi_desc_mask_irq(msi, 1, 1);
468 irq_set_msi_desc(msi->irq, NULL);
469 irq_free_desc(msi->irq);
470 msi->msg.address_lo = 0;
471 msi->msg.address_hi = 0;
476 if (zdev->aisb != -1UL) {
477 zpci_aibv[zdev->aisb] = NULL;
478 airq_iv_free_bit(zpci_aisb_iv, zdev->aisb);
482 airq_iv_release(zdev->aibv);
487 static void zpci_map_resources(struct pci_dev *pdev)
492 for (i = 0; i < PCI_BAR_COUNT; i++) {
493 len = pci_resource_len(pdev, i);
496 pdev->resource[i].start =
497 (resource_size_t __force) pci_iomap(pdev, i, 0);
498 pdev->resource[i].end = pdev->resource[i].start + len - 1;
502 static void zpci_unmap_resources(struct pci_dev *pdev)
507 for (i = 0; i < PCI_BAR_COUNT; i++) {
508 len = pci_resource_len(pdev, i);
511 pci_iounmap(pdev, (void __iomem __force *)
512 pdev->resource[i].start);
516 static struct airq_struct zpci_airq = {
517 .handler = zpci_irq_handler,
521 static int __init zpci_irq_init(void)
525 rc = register_adapter_interrupt(&zpci_airq);
528 /* Set summary to 1 to be called every time for the ISC. */
529 *zpci_airq.lsi_ptr = 1;
532 zpci_aisb_iv = airq_iv_create(ZPCI_NR_DEVICES, AIRQ_IV_ALLOC);
536 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC);
540 unregister_adapter_interrupt(&zpci_airq);
545 static void zpci_irq_exit(void)
547 airq_iv_release(zpci_aisb_iv);
548 unregister_adapter_interrupt(&zpci_airq);
551 static int zpci_alloc_iomap(struct zpci_dev *zdev)
555 spin_lock(&zpci_iomap_lock);
556 entry = find_first_zero_bit(zpci_iomap_bitmap, ZPCI_IOMAP_ENTRIES);
557 if (entry == ZPCI_IOMAP_ENTRIES) {
558 spin_unlock(&zpci_iomap_lock);
561 set_bit(entry, zpci_iomap_bitmap);
562 spin_unlock(&zpci_iomap_lock);
566 static void zpci_free_iomap(struct zpci_dev *zdev, int entry)
568 spin_lock(&zpci_iomap_lock);
569 memset(&zpci_iomap_start[entry], 0, sizeof(struct zpci_iomap_entry));
570 clear_bit(entry, zpci_iomap_bitmap);
571 spin_unlock(&zpci_iomap_lock);
574 static struct resource *__alloc_res(struct zpci_dev *zdev, unsigned long start,
575 unsigned long size, unsigned long flags)
579 r = kzalloc(sizeof(*r), GFP_KERNEL);
584 r->end = r->start + size - 1;
586 r->name = zdev->res_name;
588 if (request_resource(&iomem_resource, r)) {
595 static int zpci_setup_bus_resources(struct zpci_dev *zdev,
596 struct list_head *resources)
598 unsigned long addr, size, flags;
599 struct resource *res;
602 snprintf(zdev->res_name, sizeof(zdev->res_name),
603 "PCI Bus %04x:%02x", zdev->domain, ZPCI_BUS_NR);
605 for (i = 0; i < PCI_BAR_COUNT; i++) {
606 if (!zdev->bars[i].size)
608 entry = zpci_alloc_iomap(zdev);
611 zdev->bars[i].map_idx = entry;
613 /* only MMIO is supported */
614 flags = IORESOURCE_MEM;
615 if (zdev->bars[i].val & 8)
616 flags |= IORESOURCE_PREFETCH;
617 if (zdev->bars[i].val & 4)
618 flags |= IORESOURCE_MEM_64;
620 addr = ZPCI_ADDR(entry);
621 size = 1UL << zdev->bars[i].size;
623 res = __alloc_res(zdev, addr, size, flags);
625 zpci_free_iomap(zdev, entry);
628 zdev->bars[i].res = res;
629 pci_add_resource(resources, res);
635 static void zpci_cleanup_bus_resources(struct zpci_dev *zdev)
639 for (i = 0; i < PCI_BAR_COUNT; i++) {
640 if (!zdev->bars[i].size || !zdev->bars[i].res)
643 zpci_free_iomap(zdev, zdev->bars[i].map_idx);
644 release_resource(zdev->bars[i].res);
645 kfree(zdev->bars[i].res);
649 int pcibios_add_device(struct pci_dev *pdev)
651 struct resource *res;
655 pdev->no_vf_scan = 1;
657 pdev->dev.groups = zpci_attr_groups;
658 pdev->dev.dma_ops = &s390_pci_dma_ops;
659 zpci_map_resources(pdev);
661 for (i = 0; i < PCI_BAR_COUNT; i++) {
662 res = &pdev->resource[i];
663 if (res->parent || !res->flags)
665 pci_claim_resource(pdev, i);
671 void pcibios_release_device(struct pci_dev *pdev)
673 zpci_unmap_resources(pdev);
676 int pcibios_enable_device(struct pci_dev *pdev, int mask)
678 struct zpci_dev *zdev = to_zpci(pdev);
680 zpci_debug_init_device(zdev, dev_name(&pdev->dev));
681 zpci_fmb_enable_device(zdev);
683 return pci_enable_resources(pdev, mask);
686 void pcibios_disable_device(struct pci_dev *pdev)
688 struct zpci_dev *zdev = to_zpci(pdev);
690 zpci_fmb_disable_device(zdev);
691 zpci_debug_exit_device(zdev);
694 #ifdef CONFIG_HIBERNATE_CALLBACKS
695 static int zpci_restore(struct device *dev)
697 struct pci_dev *pdev = to_pci_dev(dev);
698 struct zpci_dev *zdev = to_zpci(pdev);
701 if (zdev->state != ZPCI_FN_STATE_ONLINE)
704 ret = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
708 zpci_map_resources(pdev);
709 zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma,
710 (u64) zdev->dma_table);
716 static int zpci_freeze(struct device *dev)
718 struct pci_dev *pdev = to_pci_dev(dev);
719 struct zpci_dev *zdev = to_zpci(pdev);
721 if (zdev->state != ZPCI_FN_STATE_ONLINE)
724 zpci_unregister_ioat(zdev, 0);
725 zpci_unmap_resources(pdev);
726 return clp_disable_fh(zdev);
729 struct dev_pm_ops pcibios_pm_ops = {
730 .thaw_noirq = zpci_restore,
731 .freeze_noirq = zpci_freeze,
732 .restore_noirq = zpci_restore,
733 .poweroff_noirq = zpci_freeze,
735 #endif /* CONFIG_HIBERNATE_CALLBACKS */
737 static int zpci_alloc_domain(struct zpci_dev *zdev)
739 if (zpci_unique_uid) {
740 zdev->domain = (u16) zdev->uid;
741 if (zdev->domain >= ZPCI_NR_DEVICES)
744 spin_lock(&zpci_domain_lock);
745 if (test_bit(zdev->domain, zpci_domain)) {
746 spin_unlock(&zpci_domain_lock);
749 set_bit(zdev->domain, zpci_domain);
750 spin_unlock(&zpci_domain_lock);
754 spin_lock(&zpci_domain_lock);
755 zdev->domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES);
756 if (zdev->domain == ZPCI_NR_DEVICES) {
757 spin_unlock(&zpci_domain_lock);
760 set_bit(zdev->domain, zpci_domain);
761 spin_unlock(&zpci_domain_lock);
765 static void zpci_free_domain(struct zpci_dev *zdev)
767 if (zdev->domain >= ZPCI_NR_DEVICES)
770 spin_lock(&zpci_domain_lock);
771 clear_bit(zdev->domain, zpci_domain);
772 spin_unlock(&zpci_domain_lock);
775 void pcibios_remove_bus(struct pci_bus *bus)
777 struct zpci_dev *zdev = get_zdev_by_bus(bus);
779 zpci_exit_slot(zdev);
780 zpci_cleanup_bus_resources(zdev);
781 zpci_destroy_iommu(zdev);
782 zpci_free_domain(zdev);
784 spin_lock(&zpci_list_lock);
785 list_del(&zdev->entry);
786 spin_unlock(&zpci_list_lock);
788 zpci_dbg(3, "rem fid:%x\n", zdev->fid);
792 static int zpci_scan_bus(struct zpci_dev *zdev)
794 LIST_HEAD(resources);
797 ret = zpci_setup_bus_resources(zdev, &resources);
801 zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops,
807 zdev->bus->max_bus_speed = zdev->max_bus_speed;
808 pci_bus_add_devices(zdev->bus);
812 zpci_cleanup_bus_resources(zdev);
813 pci_free_resource_list(&resources);
817 int zpci_enable_device(struct zpci_dev *zdev)
821 rc = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
825 rc = zpci_dma_init_device(zdev);
829 zdev->state = ZPCI_FN_STATE_ONLINE;
833 clp_disable_fh(zdev);
837 EXPORT_SYMBOL_GPL(zpci_enable_device);
839 int zpci_disable_device(struct zpci_dev *zdev)
841 zpci_dma_exit_device(zdev);
842 return clp_disable_fh(zdev);
844 EXPORT_SYMBOL_GPL(zpci_disable_device);
846 int zpci_create_device(struct zpci_dev *zdev)
850 rc = zpci_alloc_domain(zdev);
854 rc = zpci_init_iommu(zdev);
858 mutex_init(&zdev->lock);
859 if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
860 rc = zpci_enable_device(zdev);
862 goto out_destroy_iommu;
864 rc = zpci_scan_bus(zdev);
868 spin_lock(&zpci_list_lock);
869 list_add_tail(&zdev->entry, &zpci_list);
870 spin_unlock(&zpci_list_lock);
872 zpci_init_slot(zdev);
877 if (zdev->state == ZPCI_FN_STATE_ONLINE)
878 zpci_disable_device(zdev);
880 zpci_destroy_iommu(zdev);
882 zpci_free_domain(zdev);
887 void zpci_remove_device(struct zpci_dev *zdev)
892 pci_stop_root_bus(zdev->bus);
893 pci_remove_root_bus(zdev->bus);
896 int zpci_report_error(struct pci_dev *pdev,
897 struct zpci_report_error_header *report)
899 struct zpci_dev *zdev = to_zpci(pdev);
901 return sclp_pci_report(report, zdev->fh, zdev->fid);
903 EXPORT_SYMBOL(zpci_report_error);
905 static int zpci_mem_init(void)
907 BUILD_BUG_ON(!is_power_of_2(__alignof__(struct zpci_fmb)) ||
908 __alignof__(struct zpci_fmb) < sizeof(struct zpci_fmb));
910 zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb),
911 __alignof__(struct zpci_fmb), 0, NULL);
915 zpci_iomap_start = kcalloc(ZPCI_IOMAP_ENTRIES,
916 sizeof(*zpci_iomap_start), GFP_KERNEL);
917 if (!zpci_iomap_start)
920 zpci_iomap_bitmap = kcalloc(BITS_TO_LONGS(ZPCI_IOMAP_ENTRIES),
921 sizeof(*zpci_iomap_bitmap), GFP_KERNEL);
922 if (!zpci_iomap_bitmap)
923 goto error_iomap_bitmap;
927 kfree(zpci_iomap_start);
929 kmem_cache_destroy(zdev_fmb_cache);
934 static void zpci_mem_exit(void)
936 kfree(zpci_iomap_bitmap);
937 kfree(zpci_iomap_start);
938 kmem_cache_destroy(zdev_fmb_cache);
941 static unsigned int s390_pci_probe = 1;
942 static unsigned int s390_pci_initialized;
944 char * __init pcibios_setup(char *str)
946 if (!strcmp(str, "off")) {
953 bool zpci_is_enabled(void)
955 return s390_pci_initialized;
958 static int __init pci_base_init(void)
965 if (!test_facility(69) || !test_facility(71))
968 rc = zpci_debug_init();
972 rc = zpci_mem_init();
976 rc = zpci_irq_init();
980 rc = zpci_dma_init();
984 rc = clp_scan_pci_devices();
988 s390_pci_initialized = 1;
1002 subsys_initcall_sync(pci_base_init);
1004 void zpci_rescan(void)
1006 if (zpci_is_enabled())
1007 clp_rescan_pci_devices_simple();