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 COMPONENT "zPCI"
19 #define pr_fmt(fmt) 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 void zpci_enable_irq(struct irq_data *data);
52 static void zpci_disable_irq(struct irq_data *data);
54 static struct irq_chip zpci_irq_chip = {
56 .irq_unmask = zpci_enable_irq,
57 .irq_mask = zpci_disable_irq,
60 static DECLARE_BITMAP(zpci_domain, ZPCI_NR_DEVICES);
61 static DEFINE_SPINLOCK(zpci_domain_lock);
63 static struct airq_iv *zpci_aisb_iv;
64 static struct airq_iv *zpci_aibv[ZPCI_NR_DEVICES];
66 /* Adapter interrupt definitions */
67 static void zpci_irq_handler(struct airq_struct *airq);
69 static struct airq_struct zpci_airq = {
70 .handler = zpci_irq_handler,
75 static DEFINE_SPINLOCK(zpci_iomap_lock);
76 static DECLARE_BITMAP(zpci_iomap, ZPCI_IOMAP_MAX_ENTRIES);
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(struct pci_dev *pdev)
84 return (struct zpci_dev *) pdev->sysdata;
87 struct zpci_dev *get_zdev_by_fid(u32 fid)
89 struct zpci_dev *tmp, *zdev = NULL;
91 spin_lock(&zpci_list_lock);
92 list_for_each_entry(tmp, &zpci_list, entry) {
93 if (tmp->fid == fid) {
98 spin_unlock(&zpci_list_lock);
102 static struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus)
104 return (bus && bus->sysdata) ? (struct zpci_dev *) bus->sysdata : NULL;
107 int pci_domain_nr(struct pci_bus *bus)
109 return ((struct zpci_dev *) bus->sysdata)->domain;
111 EXPORT_SYMBOL_GPL(pci_domain_nr);
113 int pci_proc_domain(struct pci_bus *bus)
115 return pci_domain_nr(bus);
117 EXPORT_SYMBOL_GPL(pci_proc_domain);
119 /* Modify PCI: Register adapter interruptions */
120 static int zpci_set_airq(struct zpci_dev *zdev)
122 u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_REG_INT);
123 struct zpci_fib fib = {0};
126 fib.sum = 1; /* enable summary notifications */
127 fib.noi = airq_iv_end(zdev->aibv);
128 fib.aibv = (unsigned long) zdev->aibv->vector;
129 fib.aibvo = 0; /* each zdev has its own interrupt vector */
130 fib.aisb = (unsigned long) zpci_aisb_iv->vector + (zdev->aisb/64)*8;
131 fib.aisbo = zdev->aisb & 63;
133 return zpci_mod_fc(req, &fib);
136 struct mod_pci_args {
143 static int mod_pci(struct zpci_dev *zdev, int fn, u8 dmaas, struct mod_pci_args *args)
145 u64 req = ZPCI_CREATE_REQ(zdev->fh, dmaas, fn);
146 struct zpci_fib fib = {0};
148 fib.pba = args->base;
149 fib.pal = args->limit;
150 fib.iota = args->iota;
151 fib.fmb_addr = args->fmb_addr;
153 return zpci_mod_fc(req, &fib);
156 /* Modify PCI: Register I/O address translation parameters */
157 int zpci_register_ioat(struct zpci_dev *zdev, u8 dmaas,
158 u64 base, u64 limit, u64 iota)
160 struct mod_pci_args args = { base, limit, iota, 0 };
162 WARN_ON_ONCE(iota & 0x3fff);
163 args.iota |= ZPCI_IOTA_RTTO_FLAG;
164 return mod_pci(zdev, ZPCI_MOD_FC_REG_IOAT, dmaas, &args);
167 /* Modify PCI: Unregister I/O address translation parameters */
168 int zpci_unregister_ioat(struct zpci_dev *zdev, u8 dmaas)
170 struct mod_pci_args args = { 0, 0, 0, 0 };
172 return mod_pci(zdev, ZPCI_MOD_FC_DEREG_IOAT, dmaas, &args);
175 /* Modify PCI: Unregister adapter interruptions */
176 static int zpci_clear_airq(struct zpci_dev *zdev)
178 struct mod_pci_args args = { 0, 0, 0, 0 };
180 return mod_pci(zdev, ZPCI_MOD_FC_DEREG_INT, 0, &args);
183 /* Modify PCI: Set PCI function measurement parameters */
184 int zpci_fmb_enable_device(struct zpci_dev *zdev)
186 struct mod_pci_args args = { 0, 0, 0, 0 };
191 zdev->fmb = kmem_cache_zalloc(zdev_fmb_cache, GFP_KERNEL);
194 WARN_ON((u64) zdev->fmb & 0xf);
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 static int zpci_msi_set_mask_bits(struct msi_desc *msi, u32 mask, u32 flag)
252 if (msi->msi_attrib.is_msix) {
253 offset = msi->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE +
254 PCI_MSIX_ENTRY_VECTOR_CTRL;
255 msi->masked = readl(msi->mask_base + offset);
256 writel(flag, msi->mask_base + offset);
257 } else if (msi->msi_attrib.maskbit) {
258 pos = (long) msi->mask_base;
259 pci_read_config_dword(msi->dev, pos, &mask_bits);
260 mask_bits &= ~(mask);
261 mask_bits |= flag & mask;
262 pci_write_config_dword(msi->dev, pos, mask_bits);
266 msi->msi_attrib.maskbit = !!flag;
270 static void zpci_enable_irq(struct irq_data *data)
272 struct msi_desc *msi = irq_get_msi_desc(data->irq);
274 zpci_msi_set_mask_bits(msi, 1, 0);
277 static void zpci_disable_irq(struct irq_data *data)
279 struct msi_desc *msi = irq_get_msi_desc(data->irq);
281 zpci_msi_set_mask_bits(msi, 1, 1);
284 void pcibios_fixup_bus(struct pci_bus *bus)
288 resource_size_t pcibios_align_resource(void *data, const struct resource *res,
289 resource_size_t size,
290 resource_size_t align)
295 /* combine single writes by using store-block insn */
296 void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
298 zpci_memcpy_toio(to, from, count);
301 /* Create a virtual mapping cookie for a PCI BAR */
302 void __iomem *pci_iomap(struct pci_dev *pdev, int bar, unsigned long max)
304 struct zpci_dev *zdev = get_zdev(pdev);
308 if ((bar & 7) != bar)
311 idx = zdev->bars[bar].map_idx;
312 spin_lock(&zpci_iomap_lock);
313 zpci_iomap_start[idx].fh = zdev->fh;
314 zpci_iomap_start[idx].bar = bar;
315 spin_unlock(&zpci_iomap_lock);
317 addr = ZPCI_IOMAP_ADDR_BASE | ((u64) idx << 48);
318 return (void __iomem *) addr;
320 EXPORT_SYMBOL_GPL(pci_iomap);
322 void pci_iounmap(struct pci_dev *pdev, void __iomem *addr)
326 idx = (((__force u64) addr) & ~ZPCI_IOMAP_ADDR_BASE) >> 48;
327 spin_lock(&zpci_iomap_lock);
328 zpci_iomap_start[idx].fh = 0;
329 zpci_iomap_start[idx].bar = 0;
330 spin_unlock(&zpci_iomap_lock);
332 EXPORT_SYMBOL_GPL(pci_iounmap);
334 static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
337 struct zpci_dev *zdev = get_zdev_by_bus(bus);
340 if (!zdev || devfn != ZPCI_DEVFN)
343 ret = zpci_cfg_load(zdev, where, val, size);
348 static int pci_write(struct pci_bus *bus, unsigned int devfn, int where,
351 struct zpci_dev *zdev = get_zdev_by_bus(bus);
354 if (!zdev || devfn != ZPCI_DEVFN)
357 ret = zpci_cfg_store(zdev, where, val, size);
362 static struct pci_ops pci_root_ops = {
367 static void zpci_irq_handler(struct airq_struct *airq)
369 unsigned long si, ai;
370 struct airq_iv *aibv;
373 inc_irq_stat(IRQIO_PCI);
375 /* Scan adapter summary indicator bit vector */
376 si = airq_iv_scan(zpci_aisb_iv, si, airq_iv_end(zpci_aisb_iv));
379 /* End of second scan with interrupts on. */
381 /* First scan complete, reenable interrupts. */
382 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC);
387 /* Scan the adapter interrupt vector for this device. */
388 aibv = zpci_aibv[si];
390 ai = airq_iv_scan(aibv, ai, airq_iv_end(aibv));
393 inc_irq_stat(IRQIO_MSI);
394 airq_iv_lock(aibv, ai);
395 generic_handle_irq(airq_iv_get_data(aibv, ai));
396 airq_iv_unlock(aibv, ai);
401 int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
403 struct zpci_dev *zdev = get_zdev(pdev);
404 unsigned int hwirq, msi_vecs;
406 struct msi_desc *msi;
410 if (type == PCI_CAP_ID_MSI && nvec > 1)
412 msi_vecs = min(nvec, ZPCI_MSI_VEC_MAX);
413 msi_vecs = min_t(unsigned int, msi_vecs, CONFIG_PCI_NR_MSI);
415 /* Allocate adapter summary indicator bit */
417 aisb = airq_iv_alloc_bit(zpci_aisb_iv);
422 /* Create adapter interrupt vector */
424 zdev->aibv = airq_iv_create(msi_vecs, AIRQ_IV_DATA | AIRQ_IV_BITLOCK);
428 /* Wire up shortcut pointer */
429 zpci_aibv[aisb] = zdev->aibv;
431 /* Request MSI interrupts */
433 list_for_each_entry(msi, &pdev->msi_list, list) {
435 irq = irq_alloc_desc(0); /* Alloc irq on node 0 */
438 rc = irq_set_msi_desc(irq, msi);
441 irq_set_chip_and_handler(irq, &zpci_irq_chip,
444 msg.address_lo = zdev->msi_addr & 0xffffffff;
445 msg.address_hi = zdev->msi_addr >> 32;
446 write_msi_msg(irq, &msg);
447 airq_iv_set_data(zdev->aibv, hwirq, irq);
451 /* Enable adapter interrupts */
452 rc = zpci_set_airq(zdev);
456 return (msi_vecs == nvec) ? 0 : msi_vecs;
459 list_for_each_entry(msi, &pdev->msi_list, list) {
462 irq_set_msi_desc(msi->irq, NULL);
463 irq_free_desc(msi->irq);
464 msi->msg.address_lo = 0;
465 msi->msg.address_hi = 0;
469 zpci_aibv[aisb] = NULL;
470 airq_iv_release(zdev->aibv);
472 airq_iv_free_bit(zpci_aisb_iv, aisb);
477 void arch_teardown_msi_irqs(struct pci_dev *pdev)
479 struct zpci_dev *zdev = get_zdev(pdev);
480 struct msi_desc *msi;
483 /* Disable adapter interrupts */
484 rc = zpci_clear_airq(zdev);
488 /* Release MSI interrupts */
489 list_for_each_entry(msi, &pdev->msi_list, list) {
490 zpci_msi_set_mask_bits(msi, 1, 1);
491 irq_set_msi_desc(msi->irq, NULL);
492 irq_free_desc(msi->irq);
493 msi->msg.address_lo = 0;
494 msi->msg.address_hi = 0;
499 zpci_aibv[zdev->aisb] = NULL;
500 airq_iv_release(zdev->aibv);
501 airq_iv_free_bit(zpci_aisb_iv, zdev->aisb);
504 static void zpci_map_resources(struct zpci_dev *zdev)
506 struct pci_dev *pdev = zdev->pdev;
510 for (i = 0; i < PCI_BAR_COUNT; i++) {
511 len = pci_resource_len(pdev, i);
514 pdev->resource[i].start = (resource_size_t) pci_iomap(pdev, i, 0);
515 pdev->resource[i].end = pdev->resource[i].start + len - 1;
519 static void zpci_unmap_resources(struct zpci_dev *zdev)
521 struct pci_dev *pdev = zdev->pdev;
525 for (i = 0; i < PCI_BAR_COUNT; i++) {
526 len = pci_resource_len(pdev, i);
529 pci_iounmap(pdev, (void *) pdev->resource[i].start);
533 static int __init zpci_irq_init(void)
537 rc = register_adapter_interrupt(&zpci_airq);
540 /* Set summary to 1 to be called every time for the ISC. */
541 *zpci_airq.lsi_ptr = 1;
544 zpci_aisb_iv = airq_iv_create(ZPCI_NR_DEVICES, AIRQ_IV_ALLOC);
548 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC);
552 unregister_adapter_interrupt(&zpci_airq);
557 static void zpci_irq_exit(void)
559 airq_iv_release(zpci_aisb_iv);
560 unregister_adapter_interrupt(&zpci_airq);
563 static int zpci_alloc_iomap(struct zpci_dev *zdev)
567 spin_lock(&zpci_iomap_lock);
568 entry = find_first_zero_bit(zpci_iomap, ZPCI_IOMAP_MAX_ENTRIES);
569 if (entry == ZPCI_IOMAP_MAX_ENTRIES) {
570 spin_unlock(&zpci_iomap_lock);
573 set_bit(entry, zpci_iomap);
574 spin_unlock(&zpci_iomap_lock);
578 static void zpci_free_iomap(struct zpci_dev *zdev, int entry)
580 spin_lock(&zpci_iomap_lock);
581 memset(&zpci_iomap_start[entry], 0, sizeof(struct zpci_iomap_entry));
582 clear_bit(entry, zpci_iomap);
583 spin_unlock(&zpci_iomap_lock);
586 static struct resource *__alloc_res(struct zpci_dev *zdev, unsigned long start,
587 unsigned long size, unsigned long flags)
591 r = kzalloc(sizeof(*r), GFP_KERNEL);
596 r->end = r->start + size - 1;
598 r->name = zdev->res_name;
600 if (request_resource(&iomem_resource, r)) {
607 static int zpci_setup_bus_resources(struct zpci_dev *zdev,
608 struct list_head *resources)
610 unsigned long addr, size, flags;
611 struct resource *res;
614 snprintf(zdev->res_name, sizeof(zdev->res_name),
615 "PCI Bus %04x:%02x", zdev->domain, ZPCI_BUS_NR);
617 for (i = 0; i < PCI_BAR_COUNT; i++) {
618 if (!zdev->bars[i].size)
620 entry = zpci_alloc_iomap(zdev);
623 zdev->bars[i].map_idx = entry;
625 /* only MMIO is supported */
626 flags = IORESOURCE_MEM;
627 if (zdev->bars[i].val & 8)
628 flags |= IORESOURCE_PREFETCH;
629 if (zdev->bars[i].val & 4)
630 flags |= IORESOURCE_MEM_64;
632 addr = ZPCI_IOMAP_ADDR_BASE + ((u64) entry << 48);
634 size = 1UL << zdev->bars[i].size;
636 res = __alloc_res(zdev, addr, size, flags);
638 zpci_free_iomap(zdev, entry);
641 zdev->bars[i].res = res;
642 pci_add_resource(resources, res);
648 static void zpci_cleanup_bus_resources(struct zpci_dev *zdev)
652 for (i = 0; i < PCI_BAR_COUNT; i++) {
653 if (!zdev->bars[i].size)
656 zpci_free_iomap(zdev, zdev->bars[i].map_idx);
657 release_resource(zdev->bars[i].res);
658 kfree(zdev->bars[i].res);
662 int pcibios_add_device(struct pci_dev *pdev)
664 struct zpci_dev *zdev = get_zdev(pdev);
665 struct resource *res;
669 pdev->dev.groups = zpci_attr_groups;
670 zpci_map_resources(zdev);
672 for (i = 0; i < PCI_BAR_COUNT; i++) {
673 res = &pdev->resource[i];
674 if (res->parent || !res->flags)
676 pci_claim_resource(pdev, i);
682 int pcibios_enable_device(struct pci_dev *pdev, int mask)
684 struct zpci_dev *zdev = get_zdev(pdev);
687 zpci_debug_init_device(zdev);
688 zpci_fmb_enable_device(zdev);
689 zpci_map_resources(zdev);
691 return pci_enable_resources(pdev, mask);
694 void pcibios_disable_device(struct pci_dev *pdev)
696 struct zpci_dev *zdev = get_zdev(pdev);
698 zpci_unmap_resources(zdev);
699 zpci_fmb_disable_device(zdev);
700 zpci_debug_exit_device(zdev);
704 #ifdef CONFIG_HIBERNATE_CALLBACKS
705 static int zpci_restore(struct device *dev)
707 struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
710 if (zdev->state != ZPCI_FN_STATE_ONLINE)
713 ret = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
717 zpci_map_resources(zdev);
718 zpci_register_ioat(zdev, 0, zdev->start_dma + PAGE_OFFSET,
719 zdev->start_dma + zdev->iommu_size - 1,
720 (u64) zdev->dma_table);
726 static int zpci_freeze(struct device *dev)
728 struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
730 if (zdev->state != ZPCI_FN_STATE_ONLINE)
733 zpci_unregister_ioat(zdev, 0);
734 return clp_disable_fh(zdev);
737 struct dev_pm_ops pcibios_pm_ops = {
738 .thaw_noirq = zpci_restore,
739 .freeze_noirq = zpci_freeze,
740 .restore_noirq = zpci_restore,
741 .poweroff_noirq = zpci_freeze,
743 #endif /* CONFIG_HIBERNATE_CALLBACKS */
745 static int zpci_alloc_domain(struct zpci_dev *zdev)
747 spin_lock(&zpci_domain_lock);
748 zdev->domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES);
749 if (zdev->domain == ZPCI_NR_DEVICES) {
750 spin_unlock(&zpci_domain_lock);
753 set_bit(zdev->domain, zpci_domain);
754 spin_unlock(&zpci_domain_lock);
758 static void zpci_free_domain(struct zpci_dev *zdev)
760 spin_lock(&zpci_domain_lock);
761 clear_bit(zdev->domain, zpci_domain);
762 spin_unlock(&zpci_domain_lock);
765 void pcibios_remove_bus(struct pci_bus *bus)
767 struct zpci_dev *zdev = get_zdev_by_bus(bus);
769 zpci_exit_slot(zdev);
770 zpci_cleanup_bus_resources(zdev);
771 zpci_free_domain(zdev);
773 spin_lock(&zpci_list_lock);
774 list_del(&zdev->entry);
775 spin_unlock(&zpci_list_lock);
780 static int zpci_scan_bus(struct zpci_dev *zdev)
782 LIST_HEAD(resources);
785 ret = zpci_setup_bus_resources(zdev, &resources);
789 zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops,
792 zpci_cleanup_bus_resources(zdev);
796 zdev->bus->max_bus_speed = zdev->max_bus_speed;
800 int zpci_enable_device(struct zpci_dev *zdev)
804 rc = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
808 rc = zpci_dma_init_device(zdev);
812 zdev->state = ZPCI_FN_STATE_ONLINE;
816 clp_disable_fh(zdev);
820 EXPORT_SYMBOL_GPL(zpci_enable_device);
822 int zpci_disable_device(struct zpci_dev *zdev)
824 zpci_dma_exit_device(zdev);
825 return clp_disable_fh(zdev);
827 EXPORT_SYMBOL_GPL(zpci_disable_device);
829 int zpci_create_device(struct zpci_dev *zdev)
833 rc = zpci_alloc_domain(zdev);
837 if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
838 rc = zpci_enable_device(zdev);
842 rc = zpci_scan_bus(zdev);
846 spin_lock(&zpci_list_lock);
847 list_add_tail(&zdev->entry, &zpci_list);
848 spin_unlock(&zpci_list_lock);
850 zpci_init_slot(zdev);
855 if (zdev->state == ZPCI_FN_STATE_ONLINE)
856 zpci_disable_device(zdev);
858 zpci_free_domain(zdev);
863 void zpci_stop_device(struct zpci_dev *zdev)
865 zpci_dma_exit_device(zdev);
867 * Note: SCLP disables fh via set-pci-fn so don't
871 EXPORT_SYMBOL_GPL(zpci_stop_device);
873 static inline int barsize(u8 size)
875 return (size) ? (1 << size) >> 10 : 0;
878 static int zpci_mem_init(void)
880 zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb),
885 /* TODO: use realloc */
886 zpci_iomap_start = kzalloc(ZPCI_IOMAP_MAX_ENTRIES * sizeof(*zpci_iomap_start),
888 if (!zpci_iomap_start)
893 kmem_cache_destroy(zdev_fmb_cache);
898 static void zpci_mem_exit(void)
900 kfree(zpci_iomap_start);
901 kmem_cache_destroy(zdev_fmb_cache);
904 static unsigned int s390_pci_probe = 1;
905 static unsigned int s390_pci_initialized;
907 char * __init pcibios_setup(char *str)
909 if (!strcmp(str, "off")) {
916 bool zpci_is_enabled(void)
918 return s390_pci_initialized;
921 static int __init pci_base_init(void)
928 if (!test_facility(2) || !test_facility(69)
929 || !test_facility(71) || !test_facility(72))
932 rc = zpci_debug_init();
936 rc = zpci_mem_init();
940 rc = zpci_irq_init();
944 rc = zpci_dma_init();
948 rc = clp_scan_pci_devices();
952 s390_pci_initialized = 1;
966 subsys_initcall_sync(pci_base_init);
968 void zpci_rescan(void)
970 if (zpci_is_enabled())
971 clp_rescan_pci_devices_simple();