2 * Copyright IBM Corp. 2012
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,
72 static DEFINE_SPINLOCK(zpci_iomap_lock);
73 static DECLARE_BITMAP(zpci_iomap, ZPCI_IOMAP_MAX_ENTRIES);
74 struct zpci_iomap_entry *zpci_iomap_start;
75 EXPORT_SYMBOL_GPL(zpci_iomap_start);
77 static struct kmem_cache *zdev_fmb_cache;
79 struct zpci_dev *get_zdev(struct pci_dev *pdev)
81 return (struct zpci_dev *) pdev->sysdata;
84 struct zpci_dev *get_zdev_by_fid(u32 fid)
86 struct zpci_dev *tmp, *zdev = NULL;
88 spin_lock(&zpci_list_lock);
89 list_for_each_entry(tmp, &zpci_list, entry) {
90 if (tmp->fid == fid) {
95 spin_unlock(&zpci_list_lock);
99 static struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus)
101 return (bus && bus->sysdata) ? (struct zpci_dev *) bus->sysdata : NULL;
104 int pci_domain_nr(struct pci_bus *bus)
106 return ((struct zpci_dev *) bus->sysdata)->domain;
108 EXPORT_SYMBOL_GPL(pci_domain_nr);
110 int pci_proc_domain(struct pci_bus *bus)
112 return pci_domain_nr(bus);
114 EXPORT_SYMBOL_GPL(pci_proc_domain);
116 /* Modify PCI: Register adapter interruptions */
117 static int zpci_set_airq(struct zpci_dev *zdev)
119 u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_REG_INT);
120 struct zpci_fib fib = {0};
123 fib.sum = 1; /* enable summary notifications */
124 fib.noi = airq_iv_end(zdev->aibv);
125 fib.aibv = (unsigned long) zdev->aibv->vector;
126 fib.aibvo = 0; /* each zdev has its own interrupt vector */
127 fib.aisb = (unsigned long) zpci_aisb_iv->vector + (zdev->aisb/64)*8;
128 fib.aisbo = zdev->aisb & 63;
130 return zpci_mod_fc(req, &fib);
133 struct mod_pci_args {
140 static int mod_pci(struct zpci_dev *zdev, int fn, u8 dmaas, struct mod_pci_args *args)
142 u64 req = ZPCI_CREATE_REQ(zdev->fh, dmaas, fn);
143 struct zpci_fib fib = {0};
145 fib.pba = args->base;
146 fib.pal = args->limit;
147 fib.iota = args->iota;
148 fib.fmb_addr = args->fmb_addr;
150 return zpci_mod_fc(req, &fib);
153 /* Modify PCI: Register I/O address translation parameters */
154 int zpci_register_ioat(struct zpci_dev *zdev, u8 dmaas,
155 u64 base, u64 limit, u64 iota)
157 struct mod_pci_args args = { base, limit, iota, 0 };
159 WARN_ON_ONCE(iota & 0x3fff);
160 args.iota |= ZPCI_IOTA_RTTO_FLAG;
161 return mod_pci(zdev, ZPCI_MOD_FC_REG_IOAT, dmaas, &args);
164 /* Modify PCI: Unregister I/O address translation parameters */
165 int zpci_unregister_ioat(struct zpci_dev *zdev, u8 dmaas)
167 struct mod_pci_args args = { 0, 0, 0, 0 };
169 return mod_pci(zdev, ZPCI_MOD_FC_DEREG_IOAT, dmaas, &args);
172 /* Modify PCI: Unregister adapter interruptions */
173 static int zpci_clear_airq(struct zpci_dev *zdev)
175 struct mod_pci_args args = { 0, 0, 0, 0 };
177 return mod_pci(zdev, ZPCI_MOD_FC_DEREG_INT, 0, &args);
180 /* Modify PCI: Set PCI function measurement parameters */
181 int zpci_fmb_enable_device(struct zpci_dev *zdev)
183 struct mod_pci_args args = { 0, 0, 0, 0 };
188 zdev->fmb = kmem_cache_zalloc(zdev_fmb_cache, GFP_KERNEL);
191 WARN_ON((u64) zdev->fmb & 0xf);
193 /* reset software counters */
194 atomic64_set(&zdev->allocated_pages, 0);
195 atomic64_set(&zdev->mapped_pages, 0);
196 atomic64_set(&zdev->unmapped_pages, 0);
198 args.fmb_addr = virt_to_phys(zdev->fmb);
199 return mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
202 /* Modify PCI: Disable PCI function measurement */
203 int zpci_fmb_disable_device(struct zpci_dev *zdev)
205 struct mod_pci_args args = { 0, 0, 0, 0 };
211 /* Function measurement is disabled if fmb address is zero */
212 rc = mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
214 kmem_cache_free(zdev_fmb_cache, zdev->fmb);
219 #define ZPCI_PCIAS_CFGSPC 15
221 static int zpci_cfg_load(struct zpci_dev *zdev, int offset, u32 *val, u8 len)
223 u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
227 rc = zpci_load(&data, req, offset);
229 data = data << ((8 - len) * 8);
230 data = le64_to_cpu(data);
237 static int zpci_cfg_store(struct zpci_dev *zdev, int offset, u32 val, u8 len)
239 u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
243 data = cpu_to_le64(data);
244 data = data >> ((8 - len) * 8);
245 rc = zpci_store(data, req, offset);
249 void pcibios_fixup_bus(struct pci_bus *bus)
253 resource_size_t pcibios_align_resource(void *data, const struct resource *res,
254 resource_size_t size,
255 resource_size_t align)
260 /* combine single writes by using store-block insn */
261 void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
263 zpci_memcpy_toio(to, from, count);
266 /* Create a virtual mapping cookie for a PCI BAR */
267 void __iomem *pci_iomap_range(struct pci_dev *pdev,
269 unsigned long offset,
272 struct zpci_dev *zdev = get_zdev(pdev);
276 if ((bar & 7) != bar)
279 idx = zdev->bars[bar].map_idx;
280 spin_lock(&zpci_iomap_lock);
281 if (zpci_iomap_start[idx].count++) {
282 BUG_ON(zpci_iomap_start[idx].fh != zdev->fh ||
283 zpci_iomap_start[idx].bar != bar);
285 zpci_iomap_start[idx].fh = zdev->fh;
286 zpci_iomap_start[idx].bar = bar;
289 BUG_ON(!zpci_iomap_start[idx].count);
290 spin_unlock(&zpci_iomap_lock);
292 addr = ZPCI_IOMAP_ADDR_BASE | ((u64) idx << 48);
293 return (void __iomem *) addr + offset;
295 EXPORT_SYMBOL(pci_iomap_range);
297 void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
299 return pci_iomap_range(dev, bar, 0, maxlen);
301 EXPORT_SYMBOL(pci_iomap);
303 void pci_iounmap(struct pci_dev *pdev, void __iomem *addr)
307 idx = (((__force u64) addr) & ~ZPCI_IOMAP_ADDR_BASE) >> 48;
308 spin_lock(&zpci_iomap_lock);
309 /* Detect underrun */
310 BUG_ON(!zpci_iomap_start[idx].count);
311 if (!--zpci_iomap_start[idx].count) {
312 zpci_iomap_start[idx].fh = 0;
313 zpci_iomap_start[idx].bar = 0;
315 spin_unlock(&zpci_iomap_lock);
317 EXPORT_SYMBOL(pci_iounmap);
319 static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
322 struct zpci_dev *zdev = get_zdev_by_bus(bus);
325 if (!zdev || devfn != ZPCI_DEVFN)
328 ret = zpci_cfg_load(zdev, where, val, size);
333 static int pci_write(struct pci_bus *bus, unsigned int devfn, int where,
336 struct zpci_dev *zdev = get_zdev_by_bus(bus);
339 if (!zdev || devfn != ZPCI_DEVFN)
342 ret = zpci_cfg_store(zdev, where, val, size);
347 static struct pci_ops pci_root_ops = {
352 static void zpci_irq_handler(struct airq_struct *airq)
354 unsigned long si, ai;
355 struct airq_iv *aibv;
358 inc_irq_stat(IRQIO_PCI);
360 /* Scan adapter summary indicator bit vector */
361 si = airq_iv_scan(zpci_aisb_iv, si, airq_iv_end(zpci_aisb_iv));
364 /* End of second scan with interrupts on. */
366 /* First scan complete, reenable interrupts. */
367 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC);
372 /* Scan the adapter interrupt vector for this device. */
373 aibv = zpci_aibv[si];
375 ai = airq_iv_scan(aibv, ai, airq_iv_end(aibv));
378 inc_irq_stat(IRQIO_MSI);
379 airq_iv_lock(aibv, ai);
380 generic_handle_irq(airq_iv_get_data(aibv, ai));
381 airq_iv_unlock(aibv, ai);
386 int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
388 struct zpci_dev *zdev = get_zdev(pdev);
389 unsigned int hwirq, msi_vecs;
391 struct msi_desc *msi;
395 if (type == PCI_CAP_ID_MSI && nvec > 1)
397 msi_vecs = min_t(unsigned int, nvec, zdev->max_msi);
399 /* Allocate adapter summary indicator bit */
401 aisb = airq_iv_alloc_bit(zpci_aisb_iv);
406 /* Create adapter interrupt vector */
408 zdev->aibv = airq_iv_create(msi_vecs, AIRQ_IV_DATA | AIRQ_IV_BITLOCK);
412 /* Wire up shortcut pointer */
413 zpci_aibv[aisb] = zdev->aibv;
415 /* Request MSI interrupts */
417 list_for_each_entry(msi, &pdev->msi_list, list) {
419 irq = irq_alloc_desc(0); /* Alloc irq on node 0 */
422 rc = irq_set_msi_desc(irq, msi);
425 irq_set_chip_and_handler(irq, &zpci_irq_chip,
428 msg.address_lo = zdev->msi_addr & 0xffffffff;
429 msg.address_hi = zdev->msi_addr >> 32;
430 pci_write_msi_msg(irq, &msg);
431 airq_iv_set_data(zdev->aibv, hwirq, irq);
435 /* Enable adapter interrupts */
436 rc = zpci_set_airq(zdev);
440 return (msi_vecs == nvec) ? 0 : msi_vecs;
443 list_for_each_entry(msi, &pdev->msi_list, list) {
446 irq_set_msi_desc(msi->irq, NULL);
447 irq_free_desc(msi->irq);
448 msi->msg.address_lo = 0;
449 msi->msg.address_hi = 0;
453 zpci_aibv[aisb] = NULL;
454 airq_iv_release(zdev->aibv);
456 airq_iv_free_bit(zpci_aisb_iv, aisb);
461 void arch_teardown_msi_irqs(struct pci_dev *pdev)
463 struct zpci_dev *zdev = get_zdev(pdev);
464 struct msi_desc *msi;
467 /* Disable adapter interrupts */
468 rc = zpci_clear_airq(zdev);
472 /* Release MSI interrupts */
473 list_for_each_entry(msi, &pdev->msi_list, list) {
474 if (msi->msi_attrib.is_msix)
475 __pci_msix_desc_mask_irq(msi, 1);
477 __pci_msi_desc_mask_irq(msi, 1, 1);
478 irq_set_msi_desc(msi->irq, NULL);
479 irq_free_desc(msi->irq);
480 msi->msg.address_lo = 0;
481 msi->msg.address_hi = 0;
486 zpci_aibv[zdev->aisb] = NULL;
487 airq_iv_release(zdev->aibv);
488 airq_iv_free_bit(zpci_aisb_iv, zdev->aisb);
491 static void zpci_map_resources(struct pci_dev *pdev)
496 for (i = 0; i < PCI_BAR_COUNT; i++) {
497 len = pci_resource_len(pdev, i);
500 pdev->resource[i].start =
501 (resource_size_t __force) pci_iomap(pdev, i, 0);
502 pdev->resource[i].end = pdev->resource[i].start + len - 1;
506 static void zpci_unmap_resources(struct pci_dev *pdev)
511 for (i = 0; i < PCI_BAR_COUNT; i++) {
512 len = pci_resource_len(pdev, i);
515 pci_iounmap(pdev, (void __iomem __force *)
516 pdev->resource[i].start);
520 static int __init zpci_irq_init(void)
524 rc = register_adapter_interrupt(&zpci_airq);
527 /* Set summary to 1 to be called every time for the ISC. */
528 *zpci_airq.lsi_ptr = 1;
531 zpci_aisb_iv = airq_iv_create(ZPCI_NR_DEVICES, AIRQ_IV_ALLOC);
535 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC);
539 unregister_adapter_interrupt(&zpci_airq);
544 static void zpci_irq_exit(void)
546 airq_iv_release(zpci_aisb_iv);
547 unregister_adapter_interrupt(&zpci_airq);
550 static int zpci_alloc_iomap(struct zpci_dev *zdev)
554 spin_lock(&zpci_iomap_lock);
555 entry = find_first_zero_bit(zpci_iomap, ZPCI_IOMAP_MAX_ENTRIES);
556 if (entry == ZPCI_IOMAP_MAX_ENTRIES) {
557 spin_unlock(&zpci_iomap_lock);
560 set_bit(entry, zpci_iomap);
561 spin_unlock(&zpci_iomap_lock);
565 static void zpci_free_iomap(struct zpci_dev *zdev, int entry)
567 spin_lock(&zpci_iomap_lock);
568 memset(&zpci_iomap_start[entry], 0, sizeof(struct zpci_iomap_entry));
569 clear_bit(entry, zpci_iomap);
570 spin_unlock(&zpci_iomap_lock);
573 static struct resource *__alloc_res(struct zpci_dev *zdev, unsigned long start,
574 unsigned long size, unsigned long flags)
578 r = kzalloc(sizeof(*r), GFP_KERNEL);
583 r->end = r->start + size - 1;
585 r->name = zdev->res_name;
587 if (request_resource(&iomem_resource, r)) {
594 static int zpci_setup_bus_resources(struct zpci_dev *zdev,
595 struct list_head *resources)
597 unsigned long addr, size, flags;
598 struct resource *res;
601 snprintf(zdev->res_name, sizeof(zdev->res_name),
602 "PCI Bus %04x:%02x", zdev->domain, ZPCI_BUS_NR);
604 for (i = 0; i < PCI_BAR_COUNT; i++) {
605 if (!zdev->bars[i].size)
607 entry = zpci_alloc_iomap(zdev);
610 zdev->bars[i].map_idx = entry;
612 /* only MMIO is supported */
613 flags = IORESOURCE_MEM;
614 if (zdev->bars[i].val & 8)
615 flags |= IORESOURCE_PREFETCH;
616 if (zdev->bars[i].val & 4)
617 flags |= IORESOURCE_MEM_64;
619 addr = ZPCI_IOMAP_ADDR_BASE + ((u64) entry << 48);
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)
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 zpci_dev *zdev = get_zdev(pdev);
652 struct resource *res;
656 pdev->dev.groups = zpci_attr_groups;
657 zpci_map_resources(pdev);
659 for (i = 0; i < PCI_BAR_COUNT; i++) {
660 res = &pdev->resource[i];
661 if (res->parent || !res->flags)
663 pci_claim_resource(pdev, i);
669 void pcibios_release_device(struct pci_dev *pdev)
671 zpci_unmap_resources(pdev);
674 int pcibios_enable_device(struct pci_dev *pdev, int mask)
676 struct zpci_dev *zdev = get_zdev(pdev);
679 zpci_debug_init_device(zdev);
680 zpci_fmb_enable_device(zdev);
682 return pci_enable_resources(pdev, mask);
685 void pcibios_disable_device(struct pci_dev *pdev)
687 struct zpci_dev *zdev = get_zdev(pdev);
689 zpci_fmb_disable_device(zdev);
690 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 = get_zdev(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 + PAGE_OFFSET,
710 zdev->start_dma + zdev->iommu_size - 1,
711 (u64) zdev->dma_table);
717 static int zpci_freeze(struct device *dev)
719 struct pci_dev *pdev = to_pci_dev(dev);
720 struct zpci_dev *zdev = get_zdev(pdev);
722 if (zdev->state != ZPCI_FN_STATE_ONLINE)
725 zpci_unregister_ioat(zdev, 0);
726 zpci_unmap_resources(pdev);
727 return clp_disable_fh(zdev);
730 struct dev_pm_ops pcibios_pm_ops = {
731 .thaw_noirq = zpci_restore,
732 .freeze_noirq = zpci_freeze,
733 .restore_noirq = zpci_restore,
734 .poweroff_noirq = zpci_freeze,
736 #endif /* CONFIG_HIBERNATE_CALLBACKS */
738 static int zpci_alloc_domain(struct zpci_dev *zdev)
740 spin_lock(&zpci_domain_lock);
741 zdev->domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES);
742 if (zdev->domain == ZPCI_NR_DEVICES) {
743 spin_unlock(&zpci_domain_lock);
746 set_bit(zdev->domain, zpci_domain);
747 spin_unlock(&zpci_domain_lock);
751 static void zpci_free_domain(struct zpci_dev *zdev)
753 spin_lock(&zpci_domain_lock);
754 clear_bit(zdev->domain, zpci_domain);
755 spin_unlock(&zpci_domain_lock);
758 void pcibios_remove_bus(struct pci_bus *bus)
760 struct zpci_dev *zdev = get_zdev_by_bus(bus);
762 zpci_exit_slot(zdev);
763 zpci_cleanup_bus_resources(zdev);
764 zpci_free_domain(zdev);
766 spin_lock(&zpci_list_lock);
767 list_del(&zdev->entry);
768 spin_unlock(&zpci_list_lock);
773 static int zpci_scan_bus(struct zpci_dev *zdev)
775 LIST_HEAD(resources);
778 ret = zpci_setup_bus_resources(zdev, &resources);
782 zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops,
785 zpci_cleanup_bus_resources(zdev);
788 zdev->bus->max_bus_speed = zdev->max_bus_speed;
789 pci_bus_add_devices(zdev->bus);
793 int zpci_enable_device(struct zpci_dev *zdev)
797 rc = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
801 rc = zpci_dma_init_device(zdev);
805 zdev->state = ZPCI_FN_STATE_ONLINE;
809 clp_disable_fh(zdev);
813 EXPORT_SYMBOL_GPL(zpci_enable_device);
815 int zpci_disable_device(struct zpci_dev *zdev)
817 zpci_dma_exit_device(zdev);
818 return clp_disable_fh(zdev);
820 EXPORT_SYMBOL_GPL(zpci_disable_device);
822 int zpci_create_device(struct zpci_dev *zdev)
826 rc = zpci_alloc_domain(zdev);
830 mutex_init(&zdev->lock);
831 if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
832 rc = zpci_enable_device(zdev);
836 rc = zpci_scan_bus(zdev);
840 spin_lock(&zpci_list_lock);
841 list_add_tail(&zdev->entry, &zpci_list);
842 spin_unlock(&zpci_list_lock);
844 zpci_init_slot(zdev);
849 if (zdev->state == ZPCI_FN_STATE_ONLINE)
850 zpci_disable_device(zdev);
852 zpci_free_domain(zdev);
857 void zpci_stop_device(struct zpci_dev *zdev)
859 zpci_dma_exit_device(zdev);
861 * Note: SCLP disables fh via set-pci-fn so don't
865 EXPORT_SYMBOL_GPL(zpci_stop_device);
867 static inline int barsize(u8 size)
869 return (size) ? (1 << size) >> 10 : 0;
872 static int zpci_mem_init(void)
874 zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb),
879 /* TODO: use realloc */
880 zpci_iomap_start = kzalloc(ZPCI_IOMAP_MAX_ENTRIES * sizeof(*zpci_iomap_start),
882 if (!zpci_iomap_start)
887 kmem_cache_destroy(zdev_fmb_cache);
892 static void zpci_mem_exit(void)
894 kfree(zpci_iomap_start);
895 kmem_cache_destroy(zdev_fmb_cache);
898 static unsigned int s390_pci_probe = 1;
899 static unsigned int s390_pci_initialized;
901 char * __init pcibios_setup(char *str)
903 if (!strcmp(str, "off")) {
910 bool zpci_is_enabled(void)
912 return s390_pci_initialized;
915 static int __init pci_base_init(void)
922 if (!test_facility(69) || !test_facility(71) || !test_facility(72))
925 rc = zpci_debug_init();
929 rc = zpci_mem_init();
933 rc = zpci_irq_init();
937 rc = zpci_dma_init();
941 rc = clp_scan_pci_devices();
945 s390_pci_initialized = 1;
959 subsys_initcall_sync(pci_base_init);
961 void zpci_rescan(void)
963 if (zpci_is_enabled())
964 clp_rescan_pci_devices_simple();