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) {
424 irq = irq_alloc_desc(0); /* Alloc irq on node 0 */
427 rc = irq_set_msi_desc(irq, msi);
430 irq_set_chip_and_handler(irq, &zpci_irq_chip,
433 msg.address_lo = zdev->msi_addr & 0xffffffff;
434 msg.address_hi = zdev->msi_addr >> 32;
435 pci_write_msi_msg(irq, &msg);
436 airq_iv_set_data(zdev->aibv, hwirq, irq);
440 /* Enable adapter interrupts */
441 rc = zpci_set_airq(zdev);
445 return (msi_vecs == nvec) ? 0 : msi_vecs;
448 void arch_teardown_msi_irqs(struct pci_dev *pdev)
450 struct zpci_dev *zdev = to_zpci(pdev);
451 struct msi_desc *msi;
454 /* Disable adapter interrupts */
455 rc = zpci_clear_airq(zdev);
459 /* Release MSI interrupts */
460 for_each_pci_msi_entry(msi, pdev) {
463 if (msi->msi_attrib.is_msix)
464 __pci_msix_desc_mask_irq(msi, 1);
466 __pci_msi_desc_mask_irq(msi, 1, 1);
467 irq_set_msi_desc(msi->irq, NULL);
468 irq_free_desc(msi->irq);
469 msi->msg.address_lo = 0;
470 msi->msg.address_hi = 0;
475 if (zdev->aisb != -1UL) {
476 zpci_aibv[zdev->aisb] = NULL;
477 airq_iv_free_bit(zpci_aisb_iv, zdev->aisb);
481 airq_iv_release(zdev->aibv);
486 static void zpci_map_resources(struct pci_dev *pdev)
491 for (i = 0; i < PCI_BAR_COUNT; i++) {
492 len = pci_resource_len(pdev, i);
495 pdev->resource[i].start =
496 (resource_size_t __force) pci_iomap(pdev, i, 0);
497 pdev->resource[i].end = pdev->resource[i].start + len - 1;
501 static void zpci_unmap_resources(struct pci_dev *pdev)
506 for (i = 0; i < PCI_BAR_COUNT; i++) {
507 len = pci_resource_len(pdev, i);
510 pci_iounmap(pdev, (void __iomem __force *)
511 pdev->resource[i].start);
515 static struct airq_struct zpci_airq = {
516 .handler = zpci_irq_handler,
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_bitmap, ZPCI_IOMAP_ENTRIES);
556 if (entry == ZPCI_IOMAP_ENTRIES) {
557 spin_unlock(&zpci_iomap_lock);
560 set_bit(entry, zpci_iomap_bitmap);
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_bitmap);
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_ADDR(entry);
620 size = 1UL << zdev->bars[i].size;
622 res = __alloc_res(zdev, addr, size, flags);
624 zpci_free_iomap(zdev, entry);
627 zdev->bars[i].res = res;
628 pci_add_resource(resources, res);
634 static void zpci_cleanup_bus_resources(struct zpci_dev *zdev)
638 for (i = 0; i < PCI_BAR_COUNT; i++) {
639 if (!zdev->bars[i].size || !zdev->bars[i].res)
642 zpci_free_iomap(zdev, zdev->bars[i].map_idx);
643 release_resource(zdev->bars[i].res);
644 kfree(zdev->bars[i].res);
648 int pcibios_add_device(struct pci_dev *pdev)
650 struct resource *res;
653 pdev->dev.groups = zpci_attr_groups;
654 pdev->dev.dma_ops = &s390_pci_dma_ops;
655 zpci_map_resources(pdev);
657 for (i = 0; i < PCI_BAR_COUNT; i++) {
658 res = &pdev->resource[i];
659 if (res->parent || !res->flags)
661 pci_claim_resource(pdev, i);
667 void pcibios_release_device(struct pci_dev *pdev)
669 zpci_unmap_resources(pdev);
672 int pcibios_enable_device(struct pci_dev *pdev, int mask)
674 struct zpci_dev *zdev = to_zpci(pdev);
676 zpci_debug_init_device(zdev, dev_name(&pdev->dev));
677 zpci_fmb_enable_device(zdev);
679 return pci_enable_resources(pdev, mask);
682 void pcibios_disable_device(struct pci_dev *pdev)
684 struct zpci_dev *zdev = to_zpci(pdev);
686 zpci_fmb_disable_device(zdev);
687 zpci_debug_exit_device(zdev);
690 #ifdef CONFIG_HIBERNATE_CALLBACKS
691 static int zpci_restore(struct device *dev)
693 struct pci_dev *pdev = to_pci_dev(dev);
694 struct zpci_dev *zdev = to_zpci(pdev);
697 if (zdev->state != ZPCI_FN_STATE_ONLINE)
700 ret = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
704 zpci_map_resources(pdev);
705 zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma,
706 (u64) zdev->dma_table);
712 static int zpci_freeze(struct device *dev)
714 struct pci_dev *pdev = to_pci_dev(dev);
715 struct zpci_dev *zdev = to_zpci(pdev);
717 if (zdev->state != ZPCI_FN_STATE_ONLINE)
720 zpci_unregister_ioat(zdev, 0);
721 zpci_unmap_resources(pdev);
722 return clp_disable_fh(zdev);
725 struct dev_pm_ops pcibios_pm_ops = {
726 .thaw_noirq = zpci_restore,
727 .freeze_noirq = zpci_freeze,
728 .restore_noirq = zpci_restore,
729 .poweroff_noirq = zpci_freeze,
731 #endif /* CONFIG_HIBERNATE_CALLBACKS */
733 static int zpci_alloc_domain(struct zpci_dev *zdev)
735 if (zpci_unique_uid) {
736 zdev->domain = (u16) zdev->uid;
737 if (zdev->domain >= ZPCI_NR_DEVICES)
740 spin_lock(&zpci_domain_lock);
741 if (test_bit(zdev->domain, zpci_domain)) {
742 spin_unlock(&zpci_domain_lock);
745 set_bit(zdev->domain, zpci_domain);
746 spin_unlock(&zpci_domain_lock);
750 spin_lock(&zpci_domain_lock);
751 zdev->domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES);
752 if (zdev->domain == ZPCI_NR_DEVICES) {
753 spin_unlock(&zpci_domain_lock);
756 set_bit(zdev->domain, zpci_domain);
757 spin_unlock(&zpci_domain_lock);
761 static void zpci_free_domain(struct zpci_dev *zdev)
763 if (zdev->domain >= ZPCI_NR_DEVICES)
766 spin_lock(&zpci_domain_lock);
767 clear_bit(zdev->domain, zpci_domain);
768 spin_unlock(&zpci_domain_lock);
771 void pcibios_remove_bus(struct pci_bus *bus)
773 struct zpci_dev *zdev = get_zdev_by_bus(bus);
775 zpci_exit_slot(zdev);
776 zpci_cleanup_bus_resources(zdev);
777 zpci_destroy_iommu(zdev);
778 zpci_free_domain(zdev);
780 spin_lock(&zpci_list_lock);
781 list_del(&zdev->entry);
782 spin_unlock(&zpci_list_lock);
784 zpci_dbg(3, "rem fid:%x\n", zdev->fid);
788 static int zpci_scan_bus(struct zpci_dev *zdev)
790 LIST_HEAD(resources);
793 ret = zpci_setup_bus_resources(zdev, &resources);
797 zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops,
803 zdev->bus->max_bus_speed = zdev->max_bus_speed;
804 pci_bus_add_devices(zdev->bus);
808 zpci_cleanup_bus_resources(zdev);
809 pci_free_resource_list(&resources);
813 int zpci_enable_device(struct zpci_dev *zdev)
817 rc = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
821 rc = zpci_dma_init_device(zdev);
825 zdev->state = ZPCI_FN_STATE_ONLINE;
829 clp_disable_fh(zdev);
833 EXPORT_SYMBOL_GPL(zpci_enable_device);
835 int zpci_disable_device(struct zpci_dev *zdev)
837 zpci_dma_exit_device(zdev);
838 return clp_disable_fh(zdev);
840 EXPORT_SYMBOL_GPL(zpci_disable_device);
842 int zpci_create_device(struct zpci_dev *zdev)
846 rc = zpci_alloc_domain(zdev);
850 rc = zpci_init_iommu(zdev);
854 mutex_init(&zdev->lock);
855 if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
856 rc = zpci_enable_device(zdev);
858 goto out_destroy_iommu;
860 rc = zpci_scan_bus(zdev);
864 spin_lock(&zpci_list_lock);
865 list_add_tail(&zdev->entry, &zpci_list);
866 spin_unlock(&zpci_list_lock);
868 zpci_init_slot(zdev);
873 if (zdev->state == ZPCI_FN_STATE_ONLINE)
874 zpci_disable_device(zdev);
876 zpci_destroy_iommu(zdev);
878 zpci_free_domain(zdev);
883 void zpci_remove_device(struct zpci_dev *zdev)
888 pci_stop_root_bus(zdev->bus);
889 pci_remove_root_bus(zdev->bus);
892 int zpci_report_error(struct pci_dev *pdev,
893 struct zpci_report_error_header *report)
895 struct zpci_dev *zdev = to_zpci(pdev);
897 return sclp_pci_report(report, zdev->fh, zdev->fid);
899 EXPORT_SYMBOL(zpci_report_error);
901 static int zpci_mem_init(void)
903 BUILD_BUG_ON(!is_power_of_2(__alignof__(struct zpci_fmb)) ||
904 __alignof__(struct zpci_fmb) < sizeof(struct zpci_fmb));
906 zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb),
907 __alignof__(struct zpci_fmb), 0, NULL);
911 zpci_iomap_start = kcalloc(ZPCI_IOMAP_ENTRIES,
912 sizeof(*zpci_iomap_start), GFP_KERNEL);
913 if (!zpci_iomap_start)
916 zpci_iomap_bitmap = kcalloc(BITS_TO_LONGS(ZPCI_IOMAP_ENTRIES),
917 sizeof(*zpci_iomap_bitmap), GFP_KERNEL);
918 if (!zpci_iomap_bitmap)
919 goto error_iomap_bitmap;
923 kfree(zpci_iomap_start);
925 kmem_cache_destroy(zdev_fmb_cache);
930 static void zpci_mem_exit(void)
932 kfree(zpci_iomap_bitmap);
933 kfree(zpci_iomap_start);
934 kmem_cache_destroy(zdev_fmb_cache);
937 static unsigned int s390_pci_probe = 1;
938 static unsigned int s390_pci_initialized;
940 char * __init pcibios_setup(char *str)
942 if (!strcmp(str, "off")) {
949 bool zpci_is_enabled(void)
951 return s390_pci_initialized;
954 static int __init pci_base_init(void)
961 if (!test_facility(69) || !test_facility(71))
964 rc = zpci_debug_init();
968 rc = zpci_mem_init();
972 rc = zpci_irq_init();
976 rc = zpci_dma_init();
980 rc = clp_scan_pci_devices();
984 s390_pci_initialized = 1;
998 subsys_initcall_sync(pci_base_init);
1000 void zpci_rescan(void)
1002 if (zpci_is_enabled())
1003 clp_rescan_pci_devices_simple();