2 * Copyright IBM Corp. 2012
5 * Jan Glauber <jang@linux.vnet.ibm.com>
7 * The System z PCI code is a rewrite from a prototype by
8 * the following people (Kudoz!):
18 #define KMSG_COMPONENT "zpci"
19 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
21 #include <linux/kernel.h>
22 #include <linux/slab.h>
23 #include <linux/err.h>
24 #include <linux/export.h>
25 #include <linux/delay.h>
26 #include <linux/irq.h>
27 #include <linux/kernel_stat.h>
28 #include <linux/seq_file.h>
29 #include <linux/pci.h>
30 #include <linux/msi.h>
34 #include <asm/facility.h>
35 #include <asm/pci_insn.h>
36 #include <asm/pci_clp.h>
37 #include <asm/pci_dma.h>
39 #define DEBUG /* enable pr_debug */
41 #define SIC_IRQ_MODE_ALL 0
42 #define SIC_IRQ_MODE_SINGLE 1
44 #define ZPCI_NR_DMA_SPACES 1
45 #define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS
47 /* list of all detected zpci devices */
48 static LIST_HEAD(zpci_list);
49 static DEFINE_SPINLOCK(zpci_list_lock);
51 static struct irq_chip zpci_irq_chip = {
53 .irq_unmask = pci_msi_unmask_irq,
54 .irq_mask = pci_msi_mask_irq,
57 static DECLARE_BITMAP(zpci_domain, ZPCI_NR_DEVICES);
58 static DEFINE_SPINLOCK(zpci_domain_lock);
60 static struct airq_iv *zpci_aisb_iv;
61 static struct airq_iv *zpci_aibv[ZPCI_NR_DEVICES];
63 /* Adapter interrupt definitions */
64 static void zpci_irq_handler(struct airq_struct *airq);
66 static struct airq_struct zpci_airq = {
67 .handler = zpci_irq_handler,
71 #define ZPCI_IOMAP_ENTRIES \
72 min(((unsigned long) CONFIG_PCI_NR_FUNCTIONS * PCI_BAR_COUNT), \
73 ZPCI_IOMAP_MAX_ENTRIES)
75 static DEFINE_SPINLOCK(zpci_iomap_lock);
76 static unsigned long *zpci_iomap_bitmap;
77 struct zpci_iomap_entry *zpci_iomap_start;
78 EXPORT_SYMBOL_GPL(zpci_iomap_start);
80 static struct kmem_cache *zdev_fmb_cache;
82 struct zpci_dev *get_zdev_by_fid(u32 fid)
84 struct zpci_dev *tmp, *zdev = NULL;
86 spin_lock(&zpci_list_lock);
87 list_for_each_entry(tmp, &zpci_list, entry) {
88 if (tmp->fid == fid) {
93 spin_unlock(&zpci_list_lock);
97 static struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus)
99 return (bus && bus->sysdata) ? (struct zpci_dev *) bus->sysdata : NULL;
102 int pci_domain_nr(struct pci_bus *bus)
104 return ((struct zpci_dev *) bus->sysdata)->domain;
106 EXPORT_SYMBOL_GPL(pci_domain_nr);
108 int pci_proc_domain(struct pci_bus *bus)
110 return pci_domain_nr(bus);
112 EXPORT_SYMBOL_GPL(pci_proc_domain);
114 /* Modify PCI: Register adapter interruptions */
115 static int zpci_set_airq(struct zpci_dev *zdev)
117 u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_REG_INT);
118 struct zpci_fib fib = {0};
121 fib.sum = 1; /* enable summary notifications */
122 fib.noi = airq_iv_end(zdev->aibv);
123 fib.aibv = (unsigned long) zdev->aibv->vector;
124 fib.aibvo = 0; /* each zdev has its own interrupt vector */
125 fib.aisb = (unsigned long) zpci_aisb_iv->vector + (zdev->aisb/64)*8;
126 fib.aisbo = zdev->aisb & 63;
128 return zpci_mod_fc(req, &fib);
131 struct mod_pci_args {
138 static int mod_pci(struct zpci_dev *zdev, int fn, u8 dmaas, struct mod_pci_args *args)
140 u64 req = ZPCI_CREATE_REQ(zdev->fh, dmaas, fn);
141 struct zpci_fib fib = {0};
143 fib.pba = args->base;
144 fib.pal = args->limit;
145 fib.iota = args->iota;
146 fib.fmb_addr = args->fmb_addr;
148 return zpci_mod_fc(req, &fib);
151 /* Modify PCI: Register I/O address translation parameters */
152 int zpci_register_ioat(struct zpci_dev *zdev, u8 dmaas,
153 u64 base, u64 limit, u64 iota)
155 struct mod_pci_args args = { base, limit, iota, 0 };
157 WARN_ON_ONCE(iota & 0x3fff);
158 args.iota |= ZPCI_IOTA_RTTO_FLAG;
159 return mod_pci(zdev, ZPCI_MOD_FC_REG_IOAT, dmaas, &args);
162 /* Modify PCI: Unregister I/O address translation parameters */
163 int zpci_unregister_ioat(struct zpci_dev *zdev, u8 dmaas)
165 struct mod_pci_args args = { 0, 0, 0, 0 };
167 return mod_pci(zdev, ZPCI_MOD_FC_DEREG_IOAT, dmaas, &args);
170 /* Modify PCI: Unregister adapter interruptions */
171 static int zpci_clear_airq(struct zpci_dev *zdev)
173 struct mod_pci_args args = { 0, 0, 0, 0 };
175 return mod_pci(zdev, ZPCI_MOD_FC_DEREG_INT, 0, &args);
178 /* Modify PCI: Set PCI function measurement parameters */
179 int zpci_fmb_enable_device(struct zpci_dev *zdev)
181 struct mod_pci_args args = { 0, 0, 0, 0 };
186 zdev->fmb = kmem_cache_zalloc(zdev_fmb_cache, GFP_KERNEL);
189 WARN_ON((u64) zdev->fmb & 0xf);
191 /* reset software counters */
192 atomic64_set(&zdev->allocated_pages, 0);
193 atomic64_set(&zdev->mapped_pages, 0);
194 atomic64_set(&zdev->unmapped_pages, 0);
196 args.fmb_addr = virt_to_phys(zdev->fmb);
197 return mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
200 /* Modify PCI: Disable PCI function measurement */
201 int zpci_fmb_disable_device(struct zpci_dev *zdev)
203 struct mod_pci_args args = { 0, 0, 0, 0 };
209 /* Function measurement is disabled if fmb address is zero */
210 rc = mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
212 kmem_cache_free(zdev_fmb_cache, zdev->fmb);
217 #define ZPCI_PCIAS_CFGSPC 15
219 static int zpci_cfg_load(struct zpci_dev *zdev, int offset, u32 *val, u8 len)
221 u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
225 rc = zpci_load(&data, req, offset);
227 data = data << ((8 - len) * 8);
228 data = le64_to_cpu(data);
235 static int zpci_cfg_store(struct zpci_dev *zdev, int offset, u32 val, u8 len)
237 u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
241 data = cpu_to_le64(data);
242 data = data >> ((8 - len) * 8);
243 rc = zpci_store(data, req, offset);
247 void pcibios_fixup_bus(struct pci_bus *bus)
251 resource_size_t pcibios_align_resource(void *data, const struct resource *res,
252 resource_size_t size,
253 resource_size_t align)
258 /* combine single writes by using store-block insn */
259 void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
261 zpci_memcpy_toio(to, from, count);
264 /* Create a virtual mapping cookie for a PCI BAR */
265 void __iomem *pci_iomap_range(struct pci_dev *pdev,
267 unsigned long offset,
270 struct zpci_dev *zdev = to_zpci(pdev);
273 if (!pci_resource_len(pdev, bar))
276 idx = zdev->bars[bar].map_idx;
277 spin_lock(&zpci_iomap_lock);
279 WARN_ON(!++zpci_iomap_start[idx].count);
280 zpci_iomap_start[idx].fh = zdev->fh;
281 zpci_iomap_start[idx].bar = bar;
282 spin_unlock(&zpci_iomap_lock);
284 return (void __iomem *) ZPCI_ADDR(idx) + offset;
286 EXPORT_SYMBOL(pci_iomap_range);
288 void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
290 return pci_iomap_range(dev, bar, 0, maxlen);
292 EXPORT_SYMBOL(pci_iomap);
294 void pci_iounmap(struct pci_dev *pdev, void __iomem *addr)
296 unsigned int idx = ZPCI_IDX(addr);
298 spin_lock(&zpci_iomap_lock);
299 /* Detect underrun */
300 WARN_ON(!zpci_iomap_start[idx].count);
301 if (!--zpci_iomap_start[idx].count) {
302 zpci_iomap_start[idx].fh = 0;
303 zpci_iomap_start[idx].bar = 0;
305 spin_unlock(&zpci_iomap_lock);
307 EXPORT_SYMBOL(pci_iounmap);
309 static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
312 struct zpci_dev *zdev = get_zdev_by_bus(bus);
315 if (!zdev || devfn != ZPCI_DEVFN)
318 ret = zpci_cfg_load(zdev, where, val, size);
323 static int pci_write(struct pci_bus *bus, unsigned int devfn, int where,
326 struct zpci_dev *zdev = get_zdev_by_bus(bus);
329 if (!zdev || devfn != ZPCI_DEVFN)
332 ret = zpci_cfg_store(zdev, where, val, size);
337 static struct pci_ops pci_root_ops = {
342 static void zpci_irq_handler(struct airq_struct *airq)
344 unsigned long si, ai;
345 struct airq_iv *aibv;
348 inc_irq_stat(IRQIO_PCI);
350 /* Scan adapter summary indicator bit vector */
351 si = airq_iv_scan(zpci_aisb_iv, si, airq_iv_end(zpci_aisb_iv));
354 /* End of second scan with interrupts on. */
356 /* First scan complete, reenable interrupts. */
357 if (zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC))
363 /* Scan the adapter interrupt vector for this device. */
364 aibv = zpci_aibv[si];
366 ai = airq_iv_scan(aibv, ai, airq_iv_end(aibv));
369 inc_irq_stat(IRQIO_MSI);
370 airq_iv_lock(aibv, ai);
371 generic_handle_irq(airq_iv_get_data(aibv, ai));
372 airq_iv_unlock(aibv, ai);
377 int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
379 struct zpci_dev *zdev = to_zpci(pdev);
380 unsigned int hwirq, msi_vecs;
382 struct msi_desc *msi;
386 if (type == PCI_CAP_ID_MSI && nvec > 1)
388 msi_vecs = min_t(unsigned int, nvec, zdev->max_msi);
390 /* Allocate adapter summary indicator bit */
392 aisb = airq_iv_alloc_bit(zpci_aisb_iv);
397 /* Create adapter interrupt vector */
399 zdev->aibv = airq_iv_create(msi_vecs, AIRQ_IV_DATA | AIRQ_IV_BITLOCK);
403 /* Wire up shortcut pointer */
404 zpci_aibv[aisb] = zdev->aibv;
406 /* Request MSI interrupts */
408 for_each_pci_msi_entry(msi, pdev) {
410 if (hwirq >= msi_vecs)
412 irq = irq_alloc_desc(0); /* Alloc irq on node 0 */
415 rc = irq_set_msi_desc(irq, msi);
418 irq_set_chip_and_handler(irq, &zpci_irq_chip,
421 msg.address_lo = zdev->msi_addr & 0xffffffff;
422 msg.address_hi = zdev->msi_addr >> 32;
423 pci_write_msi_msg(irq, &msg);
424 airq_iv_set_data(zdev->aibv, hwirq, irq);
428 /* Enable adapter interrupts */
429 rc = zpci_set_airq(zdev);
433 return (msi_vecs == nvec) ? 0 : msi_vecs;
436 for_each_pci_msi_entry(msi, pdev) {
439 irq_set_msi_desc(msi->irq, NULL);
440 irq_free_desc(msi->irq);
441 msi->msg.address_lo = 0;
442 msi->msg.address_hi = 0;
446 zpci_aibv[aisb] = NULL;
447 airq_iv_release(zdev->aibv);
449 airq_iv_free_bit(zpci_aisb_iv, aisb);
454 void arch_teardown_msi_irqs(struct pci_dev *pdev)
456 struct zpci_dev *zdev = to_zpci(pdev);
457 struct msi_desc *msi;
460 /* Disable adapter interrupts */
461 rc = zpci_clear_airq(zdev);
465 /* Release MSI interrupts */
466 for_each_pci_msi_entry(msi, pdev) {
467 if (msi->msi_attrib.is_msix)
468 __pci_msix_desc_mask_irq(msi, 1);
470 __pci_msi_desc_mask_irq(msi, 1, 1);
471 irq_set_msi_desc(msi->irq, NULL);
472 irq_free_desc(msi->irq);
473 msi->msg.address_lo = 0;
474 msi->msg.address_hi = 0;
479 zpci_aibv[zdev->aisb] = NULL;
480 airq_iv_release(zdev->aibv);
481 airq_iv_free_bit(zpci_aisb_iv, zdev->aisb);
484 static void zpci_map_resources(struct pci_dev *pdev)
489 for (i = 0; i < PCI_BAR_COUNT; i++) {
490 len = pci_resource_len(pdev, i);
493 pdev->resource[i].start =
494 (resource_size_t __force) pci_iomap(pdev, i, 0);
495 pdev->resource[i].end = pdev->resource[i].start + len - 1;
499 static void zpci_unmap_resources(struct pci_dev *pdev)
504 for (i = 0; i < PCI_BAR_COUNT; i++) {
505 len = pci_resource_len(pdev, i);
508 pci_iounmap(pdev, (void __iomem __force *)
509 pdev->resource[i].start);
513 static int __init zpci_irq_init(void)
517 rc = register_adapter_interrupt(&zpci_airq);
520 /* Set summary to 1 to be called every time for the ISC. */
521 *zpci_airq.lsi_ptr = 1;
524 zpci_aisb_iv = airq_iv_create(ZPCI_NR_DEVICES, AIRQ_IV_ALLOC);
528 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC);
532 unregister_adapter_interrupt(&zpci_airq);
537 static void zpci_irq_exit(void)
539 airq_iv_release(zpci_aisb_iv);
540 unregister_adapter_interrupt(&zpci_airq);
543 static int zpci_alloc_iomap(struct zpci_dev *zdev)
547 spin_lock(&zpci_iomap_lock);
548 entry = find_first_zero_bit(zpci_iomap_bitmap, ZPCI_IOMAP_ENTRIES);
549 if (entry == ZPCI_IOMAP_ENTRIES) {
550 spin_unlock(&zpci_iomap_lock);
553 set_bit(entry, zpci_iomap_bitmap);
554 spin_unlock(&zpci_iomap_lock);
558 static void zpci_free_iomap(struct zpci_dev *zdev, int entry)
560 spin_lock(&zpci_iomap_lock);
561 memset(&zpci_iomap_start[entry], 0, sizeof(struct zpci_iomap_entry));
562 clear_bit(entry, zpci_iomap_bitmap);
563 spin_unlock(&zpci_iomap_lock);
566 static struct resource *__alloc_res(struct zpci_dev *zdev, unsigned long start,
567 unsigned long size, unsigned long flags)
571 r = kzalloc(sizeof(*r), GFP_KERNEL);
576 r->end = r->start + size - 1;
578 r->name = zdev->res_name;
580 if (request_resource(&iomem_resource, r)) {
587 static int zpci_setup_bus_resources(struct zpci_dev *zdev,
588 struct list_head *resources)
590 unsigned long addr, size, flags;
591 struct resource *res;
594 snprintf(zdev->res_name, sizeof(zdev->res_name),
595 "PCI Bus %04x:%02x", zdev->domain, ZPCI_BUS_NR);
597 for (i = 0; i < PCI_BAR_COUNT; i++) {
598 if (!zdev->bars[i].size)
600 entry = zpci_alloc_iomap(zdev);
603 zdev->bars[i].map_idx = entry;
605 /* only MMIO is supported */
606 flags = IORESOURCE_MEM;
607 if (zdev->bars[i].val & 8)
608 flags |= IORESOURCE_PREFETCH;
609 if (zdev->bars[i].val & 4)
610 flags |= IORESOURCE_MEM_64;
612 addr = ZPCI_ADDR(entry);
613 size = 1UL << zdev->bars[i].size;
615 res = __alloc_res(zdev, addr, size, flags);
617 zpci_free_iomap(zdev, entry);
620 zdev->bars[i].res = res;
621 pci_add_resource(resources, res);
627 static void zpci_cleanup_bus_resources(struct zpci_dev *zdev)
631 for (i = 0; i < PCI_BAR_COUNT; i++) {
632 if (!zdev->bars[i].size || !zdev->bars[i].res)
635 zpci_free_iomap(zdev, zdev->bars[i].map_idx);
636 release_resource(zdev->bars[i].res);
637 kfree(zdev->bars[i].res);
641 int pcibios_add_device(struct pci_dev *pdev)
643 struct resource *res;
646 pdev->dev.groups = zpci_attr_groups;
647 pdev->dev.archdata.dma_ops = &s390_pci_dma_ops;
648 zpci_map_resources(pdev);
650 for (i = 0; i < PCI_BAR_COUNT; i++) {
651 res = &pdev->resource[i];
652 if (res->parent || !res->flags)
654 pci_claim_resource(pdev, i);
660 void pcibios_release_device(struct pci_dev *pdev)
662 zpci_unmap_resources(pdev);
665 int pcibios_enable_device(struct pci_dev *pdev, int mask)
667 struct zpci_dev *zdev = to_zpci(pdev);
669 zpci_debug_init_device(zdev, dev_name(&pdev->dev));
670 zpci_fmb_enable_device(zdev);
672 return pci_enable_resources(pdev, mask);
675 void pcibios_disable_device(struct pci_dev *pdev)
677 struct zpci_dev *zdev = to_zpci(pdev);
679 zpci_fmb_disable_device(zdev);
680 zpci_debug_exit_device(zdev);
683 #ifdef CONFIG_HIBERNATE_CALLBACKS
684 static int zpci_restore(struct device *dev)
686 struct pci_dev *pdev = to_pci_dev(dev);
687 struct zpci_dev *zdev = to_zpci(pdev);
690 if (zdev->state != ZPCI_FN_STATE_ONLINE)
693 ret = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
697 zpci_map_resources(pdev);
698 zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma,
699 (u64) zdev->dma_table);
705 static int zpci_freeze(struct device *dev)
707 struct pci_dev *pdev = to_pci_dev(dev);
708 struct zpci_dev *zdev = to_zpci(pdev);
710 if (zdev->state != ZPCI_FN_STATE_ONLINE)
713 zpci_unregister_ioat(zdev, 0);
714 zpci_unmap_resources(pdev);
715 return clp_disable_fh(zdev);
718 struct dev_pm_ops pcibios_pm_ops = {
719 .thaw_noirq = zpci_restore,
720 .freeze_noirq = zpci_freeze,
721 .restore_noirq = zpci_restore,
722 .poweroff_noirq = zpci_freeze,
724 #endif /* CONFIG_HIBERNATE_CALLBACKS */
726 static int zpci_alloc_domain(struct zpci_dev *zdev)
728 spin_lock(&zpci_domain_lock);
729 zdev->domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES);
730 if (zdev->domain == ZPCI_NR_DEVICES) {
731 spin_unlock(&zpci_domain_lock);
734 set_bit(zdev->domain, zpci_domain);
735 spin_unlock(&zpci_domain_lock);
739 static void zpci_free_domain(struct zpci_dev *zdev)
741 spin_lock(&zpci_domain_lock);
742 clear_bit(zdev->domain, zpci_domain);
743 spin_unlock(&zpci_domain_lock);
746 void pcibios_remove_bus(struct pci_bus *bus)
748 struct zpci_dev *zdev = get_zdev_by_bus(bus);
750 zpci_exit_slot(zdev);
751 zpci_cleanup_bus_resources(zdev);
752 zpci_free_domain(zdev);
754 spin_lock(&zpci_list_lock);
755 list_del(&zdev->entry);
756 spin_unlock(&zpci_list_lock);
761 static int zpci_scan_bus(struct zpci_dev *zdev)
763 LIST_HEAD(resources);
766 ret = zpci_setup_bus_resources(zdev, &resources);
770 zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops,
776 zdev->bus->max_bus_speed = zdev->max_bus_speed;
777 pci_bus_add_devices(zdev->bus);
781 zpci_cleanup_bus_resources(zdev);
782 pci_free_resource_list(&resources);
786 int zpci_enable_device(struct zpci_dev *zdev)
790 rc = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
794 rc = zpci_dma_init_device(zdev);
798 zdev->state = ZPCI_FN_STATE_ONLINE;
802 clp_disable_fh(zdev);
806 EXPORT_SYMBOL_GPL(zpci_enable_device);
808 int zpci_disable_device(struct zpci_dev *zdev)
810 zpci_dma_exit_device(zdev);
811 return clp_disable_fh(zdev);
813 EXPORT_SYMBOL_GPL(zpci_disable_device);
815 int zpci_create_device(struct zpci_dev *zdev)
819 rc = zpci_alloc_domain(zdev);
823 mutex_init(&zdev->lock);
824 if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
825 rc = zpci_enable_device(zdev);
829 rc = zpci_scan_bus(zdev);
833 spin_lock(&zpci_list_lock);
834 list_add_tail(&zdev->entry, &zpci_list);
835 spin_unlock(&zpci_list_lock);
837 zpci_init_slot(zdev);
842 if (zdev->state == ZPCI_FN_STATE_ONLINE)
843 zpci_disable_device(zdev);
845 zpci_free_domain(zdev);
850 void zpci_stop_device(struct zpci_dev *zdev)
852 zpci_dma_exit_device(zdev);
854 * Note: SCLP disables fh via set-pci-fn so don't
858 EXPORT_SYMBOL_GPL(zpci_stop_device);
860 int zpci_report_error(struct pci_dev *pdev,
861 struct zpci_report_error_header *report)
863 struct zpci_dev *zdev = to_zpci(pdev);
865 return sclp_pci_report(report, zdev->fh, zdev->fid);
867 EXPORT_SYMBOL(zpci_report_error);
869 static inline int barsize(u8 size)
871 return (size) ? (1 << size) >> 10 : 0;
874 static int zpci_mem_init(void)
876 BUILD_BUG_ON(!is_power_of_2(__alignof__(struct zpci_fmb)) ||
877 __alignof__(struct zpci_fmb) < sizeof(struct zpci_fmb));
879 zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb),
880 __alignof__(struct zpci_fmb), 0, NULL);
884 zpci_iomap_start = kcalloc(ZPCI_IOMAP_ENTRIES,
885 sizeof(*zpci_iomap_start), GFP_KERNEL);
886 if (!zpci_iomap_start)
889 zpci_iomap_bitmap = kcalloc(BITS_TO_LONGS(ZPCI_IOMAP_ENTRIES),
890 sizeof(*zpci_iomap_bitmap), GFP_KERNEL);
891 if (!zpci_iomap_bitmap)
892 goto error_iomap_bitmap;
896 kfree(zpci_iomap_start);
898 kmem_cache_destroy(zdev_fmb_cache);
903 static void zpci_mem_exit(void)
905 kfree(zpci_iomap_bitmap);
906 kfree(zpci_iomap_start);
907 kmem_cache_destroy(zdev_fmb_cache);
910 static unsigned int s390_pci_probe = 1;
911 static unsigned int s390_pci_initialized;
913 char * __init pcibios_setup(char *str)
915 if (!strcmp(str, "off")) {
922 bool zpci_is_enabled(void)
924 return s390_pci_initialized;
927 static int __init pci_base_init(void)
934 if (!test_facility(69) || !test_facility(71))
937 rc = zpci_debug_init();
941 rc = zpci_mem_init();
945 rc = zpci_irq_init();
949 rc = zpci_dma_init();
953 rc = clp_scan_pci_devices();
957 s390_pci_initialized = 1;
971 subsys_initcall_sync(pci_base_init);
973 void zpci_rescan(void)
975 if (zpci_is_enabled())
976 clp_rescan_pci_devices_simple();