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_MSI_VEC_BITS 6
46 #define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS
48 /* list of all detected zpci devices */
50 EXPORT_SYMBOL_GPL(zpci_list);
51 DEFINE_MUTEX(zpci_list_lock);
52 EXPORT_SYMBOL_GPL(zpci_list_lock);
54 static struct pci_hp_callback_ops *hotplug_ops;
56 static DECLARE_BITMAP(zpci_domain, ZPCI_NR_DEVICES);
57 static DEFINE_SPINLOCK(zpci_domain_lock);
60 irq_handler_t handler;
65 unsigned long aibv; /* AI bit vector */
66 int msi_vecs; /* consecutive MSI-vectors used */
68 struct callback cb[ZPCI_NR_MSI_VECS]; /* callback handler array */
69 spinlock_t lock; /* protect callbacks against de-reg */
73 /* amap of adapters, one bit per dev, corresponds to one irq nr */
75 /* AI summary bit, global page for all devices */
77 /* pointer to aibv and callback data in zdev */
78 struct zdev_irq_map *imap[ZPCI_NR_DEVICES];
79 /* protects the whole bucket struct */
83 static struct intr_bucket *bucket;
85 /* Adapter interrupt definitions */
86 static void zpci_irq_handler(struct airq_struct *airq);
88 static struct airq_struct zpci_airq = {
89 .handler = zpci_irq_handler,
94 static DEFINE_SPINLOCK(zpci_iomap_lock);
95 static DECLARE_BITMAP(zpci_iomap, ZPCI_IOMAP_MAX_ENTRIES);
96 struct zpci_iomap_entry *zpci_iomap_start;
97 EXPORT_SYMBOL_GPL(zpci_iomap_start);
99 /* highest irq summary bit */
100 static int __read_mostly aisb_max;
102 static struct kmem_cache *zdev_irq_cache;
103 static struct kmem_cache *zdev_fmb_cache;
105 static inline int irq_to_msi_nr(unsigned int irq)
107 return irq & ZPCI_MSI_MASK;
110 static inline int irq_to_dev_nr(unsigned int irq)
112 return irq >> ZPCI_MSI_VEC_BITS;
115 static inline struct zdev_irq_map *get_imap(unsigned int irq)
117 return bucket->imap[irq_to_dev_nr(irq)];
120 struct zpci_dev *get_zdev(struct pci_dev *pdev)
122 return (struct zpci_dev *) pdev->sysdata;
125 struct zpci_dev *get_zdev_by_fid(u32 fid)
127 struct zpci_dev *tmp, *zdev = NULL;
129 mutex_lock(&zpci_list_lock);
130 list_for_each_entry(tmp, &zpci_list, entry) {
131 if (tmp->fid == fid) {
136 mutex_unlock(&zpci_list_lock);
140 bool zpci_fid_present(u32 fid)
142 return (get_zdev_by_fid(fid) != NULL) ? true : false;
145 static struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus)
147 return (bus && bus->sysdata) ? (struct zpci_dev *) bus->sysdata : NULL;
150 int pci_domain_nr(struct pci_bus *bus)
152 return ((struct zpci_dev *) bus->sysdata)->domain;
154 EXPORT_SYMBOL_GPL(pci_domain_nr);
156 int pci_proc_domain(struct pci_bus *bus)
158 return pci_domain_nr(bus);
160 EXPORT_SYMBOL_GPL(pci_proc_domain);
162 /* Modify PCI: Register adapter interruptions */
163 static int zpci_register_airq(struct zpci_dev *zdev, unsigned int aisb,
166 u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_REG_INT);
167 struct zpci_fib *fib;
170 fib = (void *) get_zeroed_page(GFP_KERNEL);
175 fib->noi = zdev->irq_map->msi_vecs;
176 fib->sum = 1; /* enable summary notifications */
178 fib->aibvo = 0; /* every function has its own page */
179 fib->aisb = (u64) bucket->aisb + aisb / 8;
180 fib->aisbo = aisb & ZPCI_MSI_MASK;
182 rc = zpci_mod_fc(req, fib);
183 pr_debug("%s mpcifc returned noi: %d\n", __func__, fib->noi);
185 free_page((unsigned long) fib);
189 struct mod_pci_args {
196 static int mod_pci(struct zpci_dev *zdev, int fn, u8 dmaas, struct mod_pci_args *args)
198 u64 req = ZPCI_CREATE_REQ(zdev->fh, dmaas, fn);
199 struct zpci_fib *fib;
202 /* The FIB must be available even if it's not used */
203 fib = (void *) get_zeroed_page(GFP_KERNEL);
207 fib->pba = args->base;
208 fib->pal = args->limit;
209 fib->iota = args->iota;
210 fib->fmb_addr = args->fmb_addr;
212 rc = zpci_mod_fc(req, fib);
213 free_page((unsigned long) fib);
217 /* Modify PCI: Register I/O address translation parameters */
218 int zpci_register_ioat(struct zpci_dev *zdev, u8 dmaas,
219 u64 base, u64 limit, u64 iota)
221 struct mod_pci_args args = { base, limit, iota, 0 };
223 WARN_ON_ONCE(iota & 0x3fff);
224 args.iota |= ZPCI_IOTA_RTTO_FLAG;
225 return mod_pci(zdev, ZPCI_MOD_FC_REG_IOAT, dmaas, &args);
228 /* Modify PCI: Unregister I/O address translation parameters */
229 int zpci_unregister_ioat(struct zpci_dev *zdev, u8 dmaas)
231 struct mod_pci_args args = { 0, 0, 0, 0 };
233 return mod_pci(zdev, ZPCI_MOD_FC_DEREG_IOAT, dmaas, &args);
236 /* Modify PCI: Unregister adapter interruptions */
237 static int zpci_unregister_airq(struct zpci_dev *zdev)
239 struct mod_pci_args args = { 0, 0, 0, 0 };
241 return mod_pci(zdev, ZPCI_MOD_FC_DEREG_INT, 0, &args);
244 /* Modify PCI: Set PCI function measurement parameters */
245 int zpci_fmb_enable_device(struct zpci_dev *zdev)
247 struct mod_pci_args args = { 0, 0, 0, 0 };
252 zdev->fmb = kmem_cache_zalloc(zdev_fmb_cache, GFP_KERNEL);
255 WARN_ON((u64) zdev->fmb & 0xf);
257 args.fmb_addr = virt_to_phys(zdev->fmb);
258 return mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
261 /* Modify PCI: Disable PCI function measurement */
262 int zpci_fmb_disable_device(struct zpci_dev *zdev)
264 struct mod_pci_args args = { 0, 0, 0, 0 };
270 /* Function measurement is disabled if fmb address is zero */
271 rc = mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
273 kmem_cache_free(zdev_fmb_cache, zdev->fmb);
278 #define ZPCI_PCIAS_CFGSPC 15
280 static int zpci_cfg_load(struct zpci_dev *zdev, int offset, u32 *val, u8 len)
282 u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
286 rc = zpci_load(&data, req, offset);
288 data = data << ((8 - len) * 8);
289 data = le64_to_cpu(data);
296 static int zpci_cfg_store(struct zpci_dev *zdev, int offset, u32 val, u8 len)
298 u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
302 data = cpu_to_le64(data);
303 data = data >> ((8 - len) * 8);
304 rc = zpci_store(data, req, offset);
308 void enable_irq(unsigned int irq)
310 struct msi_desc *msi = irq_get_msi_desc(irq);
312 zpci_msi_set_mask_bits(msi, 1, 0);
314 EXPORT_SYMBOL_GPL(enable_irq);
316 void disable_irq(unsigned int irq)
318 struct msi_desc *msi = irq_get_msi_desc(irq);
320 zpci_msi_set_mask_bits(msi, 1, 1);
322 EXPORT_SYMBOL_GPL(disable_irq);
324 void pcibios_fixup_bus(struct pci_bus *bus)
328 resource_size_t pcibios_align_resource(void *data, const struct resource *res,
329 resource_size_t size,
330 resource_size_t align)
335 /* combine single writes by using store-block insn */
336 void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
338 zpci_memcpy_toio(to, from, count);
341 /* Create a virtual mapping cookie for a PCI BAR */
342 void __iomem *pci_iomap(struct pci_dev *pdev, int bar, unsigned long max)
344 struct zpci_dev *zdev = get_zdev(pdev);
348 if ((bar & 7) != bar)
351 idx = zdev->bars[bar].map_idx;
352 spin_lock(&zpci_iomap_lock);
353 zpci_iomap_start[idx].fh = zdev->fh;
354 zpci_iomap_start[idx].bar = bar;
355 spin_unlock(&zpci_iomap_lock);
357 addr = ZPCI_IOMAP_ADDR_BASE | ((u64) idx << 48);
358 return (void __iomem *) addr;
360 EXPORT_SYMBOL_GPL(pci_iomap);
362 void pci_iounmap(struct pci_dev *pdev, void __iomem *addr)
366 idx = (((__force u64) addr) & ~ZPCI_IOMAP_ADDR_BASE) >> 48;
367 spin_lock(&zpci_iomap_lock);
368 zpci_iomap_start[idx].fh = 0;
369 zpci_iomap_start[idx].bar = 0;
370 spin_unlock(&zpci_iomap_lock);
372 EXPORT_SYMBOL_GPL(pci_iounmap);
374 static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
377 struct zpci_dev *zdev = get_zdev_by_bus(bus);
380 if (!zdev || devfn != ZPCI_DEVFN)
383 ret = zpci_cfg_load(zdev, where, val, size);
388 static int pci_write(struct pci_bus *bus, unsigned int devfn, int where,
391 struct zpci_dev *zdev = get_zdev_by_bus(bus);
394 if (!zdev || devfn != ZPCI_DEVFN)
397 ret = zpci_cfg_store(zdev, where, val, size);
402 static struct pci_ops pci_root_ops = {
407 /* store the last handled bit to implement fair scheduling of devices */
408 static DEFINE_PER_CPU(unsigned long, next_sbit);
410 static void zpci_irq_handler(struct airq_struct *airq)
412 unsigned long sbit, mbit, last = 0, start = __get_cpu_var(next_sbit);
413 int rescan = 0, max = aisb_max;
414 struct zdev_irq_map *imap;
416 inc_irq_stat(IRQIO_PCI);
420 /* find summary_bit */
421 for_each_set_bit_left_cont(sbit, bucket->aisb, max) {
422 clear_bit(63 - (sbit & 63), bucket->aisb + (sbit >> 6));
425 /* find vector bit */
426 imap = bucket->imap[sbit];
427 for_each_set_bit_left(mbit, &imap->aibv, imap->msi_vecs) {
428 inc_irq_stat(IRQIO_MSI);
429 clear_bit(63 - mbit, &imap->aibv);
431 spin_lock(&imap->lock);
432 if (imap->cb[mbit].handler)
433 imap->cb[mbit].handler(mbit,
434 imap->cb[mbit].data);
435 spin_unlock(&imap->lock);
442 /* scan the skipped bits */
450 /* enable interrupts again */
451 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC);
453 /* check again to not lose initiative */
456 sbit = find_first_bit_left(bucket->aisb, max);
462 /* store next device bit to scan */
463 __get_cpu_var(next_sbit) = (++last >= aisb_max) ? 0 : last;
466 /* msi_vecs - number of requested interrupts, 0 place function to error state */
467 static int zpci_setup_msi(struct pci_dev *pdev, int msi_vecs)
469 struct zpci_dev *zdev = get_zdev(pdev);
470 unsigned int aisb, msi_nr;
471 struct msi_desc *msi;
474 /* store the number of used MSI vectors */
475 zdev->irq_map->msi_vecs = min(msi_vecs, ZPCI_NR_MSI_VECS);
477 spin_lock(&bucket->lock);
478 aisb = find_first_zero_bit(bucket->alloc, PAGE_SIZE);
479 /* alloc map exhausted? */
480 if (aisb == PAGE_SIZE) {
481 spin_unlock(&bucket->lock);
484 set_bit(aisb, bucket->alloc);
485 spin_unlock(&bucket->lock);
488 if (aisb + 1 > aisb_max)
491 /* wire up IRQ shortcut pointer */
492 bucket->imap[zdev->aisb] = zdev->irq_map;
493 pr_debug("%s: imap[%u] linked to %p\n", __func__, zdev->aisb, zdev->irq_map);
495 /* TODO: irq number 0 wont be found if we return less than requested MSIs.
496 * ignore it for now and fix in common code.
498 msi_nr = aisb << ZPCI_MSI_VEC_BITS;
500 list_for_each_entry(msi, &pdev->msi_list, list) {
501 rc = zpci_setup_msi_irq(zdev, msi, msi_nr,
502 aisb << ZPCI_MSI_VEC_BITS);
508 rc = zpci_register_airq(zdev, aisb, (u64) &zdev->irq_map->aibv);
510 clear_bit(aisb, bucket->alloc);
511 dev_err(&pdev->dev, "register MSI failed with: %d\n", rc);
514 return (zdev->irq_map->msi_vecs == msi_vecs) ?
515 0 : zdev->irq_map->msi_vecs;
518 static void zpci_teardown_msi(struct pci_dev *pdev)
520 struct zpci_dev *zdev = get_zdev(pdev);
521 struct msi_desc *msi;
524 rc = zpci_unregister_airq(zdev);
526 dev_err(&pdev->dev, "deregister MSI failed with: %d\n", rc);
530 msi = list_first_entry(&pdev->msi_list, struct msi_desc, list);
531 aisb = irq_to_dev_nr(msi->irq);
533 list_for_each_entry(msi, &pdev->msi_list, list)
534 zpci_teardown_msi_irq(zdev, msi);
536 clear_bit(aisb, bucket->alloc);
537 if (aisb + 1 == aisb_max)
541 int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
543 pr_debug("%s: requesting %d MSI-X interrupts...", __func__, nvec);
544 if (type != PCI_CAP_ID_MSIX && type != PCI_CAP_ID_MSI)
546 return zpci_setup_msi(pdev, nvec);
549 void arch_teardown_msi_irqs(struct pci_dev *pdev)
551 pr_info("%s: on pdev: %p\n", __func__, pdev);
552 zpci_teardown_msi(pdev);
555 static void zpci_map_resources(struct zpci_dev *zdev)
557 struct pci_dev *pdev = zdev->pdev;
561 for (i = 0; i < PCI_BAR_COUNT; i++) {
562 len = pci_resource_len(pdev, i);
565 pdev->resource[i].start = (resource_size_t) pci_iomap(pdev, i, 0);
566 pdev->resource[i].end = pdev->resource[i].start + len - 1;
567 pr_debug("BAR%i: -> start: %Lx end: %Lx\n",
568 i, pdev->resource[i].start, pdev->resource[i].end);
572 static void zpci_unmap_resources(struct zpci_dev *zdev)
574 struct pci_dev *pdev = zdev->pdev;
578 for (i = 0; i < PCI_BAR_COUNT; i++) {
579 len = pci_resource_len(pdev, i);
582 pci_iounmap(pdev, (void *) pdev->resource[i].start);
586 struct zpci_dev *zpci_alloc_device(void)
588 struct zpci_dev *zdev;
590 /* Alloc memory for our private pci device data */
591 zdev = kzalloc(sizeof(*zdev), GFP_KERNEL);
593 return ERR_PTR(-ENOMEM);
595 /* Alloc aibv & callback space */
596 zdev->irq_map = kmem_cache_zalloc(zdev_irq_cache, GFP_KERNEL);
599 WARN_ON((u64) zdev->irq_map & 0xff);
604 return ERR_PTR(-ENOMEM);
607 void zpci_free_device(struct zpci_dev *zdev)
609 kmem_cache_free(zdev_irq_cache, zdev->irq_map);
614 * Too late for any s390 specific setup, since interrupts must be set up
615 * already which requires DMA setup too and the pci scan will access the
616 * config space, which only works if the function handle is enabled.
618 int pcibios_enable_device(struct pci_dev *pdev, int mask)
620 struct resource *res;
624 pci_read_config_word(pdev, PCI_COMMAND, &cmd);
626 for (i = 0; i < PCI_BAR_COUNT; i++) {
627 res = &pdev->resource[i];
629 if (res->flags & IORESOURCE_IO)
632 if (res->flags & IORESOURCE_MEM)
633 cmd |= PCI_COMMAND_MEMORY;
635 pci_write_config_word(pdev, PCI_COMMAND, cmd);
639 int pcibios_add_platform_entries(struct pci_dev *pdev)
641 return zpci_sysfs_add_device(&pdev->dev);
644 int zpci_request_irq(unsigned int irq, irq_handler_t handler, void *data)
646 int msi_nr = irq_to_msi_nr(irq);
647 struct zdev_irq_map *imap;
648 struct msi_desc *msi;
650 msi = irq_get_msi_desc(irq);
654 imap = get_imap(irq);
655 spin_lock_init(&imap->lock);
657 pr_debug("%s: register handler for IRQ:MSI %d:%d\n", __func__, irq >> 6, msi_nr);
658 imap->cb[msi_nr].handler = handler;
659 imap->cb[msi_nr].data = data;
662 * The generic MSI code returns with the interrupt disabled on the
663 * card, using the MSI mask bits. Firmware doesn't appear to unmask
664 * at that level, so we do it here by hand.
666 zpci_msi_set_mask_bits(msi, 1, 0);
670 void zpci_free_irq(unsigned int irq)
672 struct zdev_irq_map *imap = get_imap(irq);
673 int msi_nr = irq_to_msi_nr(irq);
676 pr_debug("%s: for irq: %d\n", __func__, irq);
678 spin_lock_irqsave(&imap->lock, flags);
679 imap->cb[msi_nr].handler = NULL;
680 imap->cb[msi_nr].data = NULL;
681 spin_unlock_irqrestore(&imap->lock, flags);
684 int request_irq(unsigned int irq, irq_handler_t handler,
685 unsigned long irqflags, const char *devname, void *dev_id)
687 pr_debug("%s: irq: %d handler: %p flags: %lx dev: %s\n",
688 __func__, irq, handler, irqflags, devname);
690 return zpci_request_irq(irq, handler, dev_id);
692 EXPORT_SYMBOL_GPL(request_irq);
694 void free_irq(unsigned int irq, void *dev_id)
698 EXPORT_SYMBOL_GPL(free_irq);
700 static int __init zpci_irq_init(void)
704 bucket = kzalloc(sizeof(*bucket), GFP_KERNEL);
708 bucket->aisb = (unsigned long *) get_zeroed_page(GFP_KERNEL);
714 bucket->alloc = (unsigned long *) get_zeroed_page(GFP_KERNEL);
715 if (!bucket->alloc) {
720 rc = register_adapter_interrupt(&zpci_airq);
723 /* Set summary to 1 to be called every time for the ISC. */
724 *zpci_airq.lsi_ptr = 1;
726 for_each_online_cpu(cpu)
727 per_cpu(next_sbit, cpu) = 0;
729 spin_lock_init(&bucket->lock);
730 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC);
734 free_page((unsigned long) bucket->alloc);
736 free_page((unsigned long) bucket->aisb);
742 static void zpci_irq_exit(void)
744 free_page((unsigned long) bucket->alloc);
745 free_page((unsigned long) bucket->aisb);
746 unregister_adapter_interrupt(&zpci_airq);
750 static struct resource *zpci_alloc_bus_resource(unsigned long start, unsigned long size,
751 unsigned long flags, int domain)
757 r = kzalloc(sizeof(*r), GFP_KERNEL);
759 return ERR_PTR(-ENOMEM);
761 r->end = r->start + size - 1;
763 r->parent = &iomem_resource;
764 name = kmalloc(18, GFP_KERNEL);
767 return ERR_PTR(-ENOMEM);
769 sprintf(name, "PCI Bus: %04x:%02x", domain, ZPCI_BUS_NR);
772 rc = request_resource(&iomem_resource, r);
774 pr_debug("request resource %pR failed\n", r);
778 static int zpci_alloc_iomap(struct zpci_dev *zdev)
782 spin_lock(&zpci_iomap_lock);
783 entry = find_first_zero_bit(zpci_iomap, ZPCI_IOMAP_MAX_ENTRIES);
784 if (entry == ZPCI_IOMAP_MAX_ENTRIES) {
785 spin_unlock(&zpci_iomap_lock);
788 set_bit(entry, zpci_iomap);
789 spin_unlock(&zpci_iomap_lock);
793 static void zpci_free_iomap(struct zpci_dev *zdev, int entry)
795 spin_lock(&zpci_iomap_lock);
796 memset(&zpci_iomap_start[entry], 0, sizeof(struct zpci_iomap_entry));
797 clear_bit(entry, zpci_iomap);
798 spin_unlock(&zpci_iomap_lock);
801 int pcibios_add_device(struct pci_dev *pdev)
803 struct zpci_dev *zdev = get_zdev(pdev);
806 zpci_debug_init_device(zdev);
807 zpci_fmb_enable_device(zdev);
808 zpci_map_resources(zdev);
813 void pcibios_release_device(struct pci_dev *pdev)
815 struct zpci_dev *zdev = get_zdev(pdev);
817 zpci_unmap_resources(zdev);
818 zpci_fmb_disable_device(zdev);
819 zpci_debug_exit_device(zdev);
823 static int zpci_scan_bus(struct zpci_dev *zdev)
825 struct resource *res;
826 LIST_HEAD(resources);
829 /* allocate mapping entry for each used bar */
830 for (i = 0; i < PCI_BAR_COUNT; i++) {
831 unsigned long addr, size, flags;
834 if (!zdev->bars[i].size)
836 entry = zpci_alloc_iomap(zdev);
839 zdev->bars[i].map_idx = entry;
841 /* only MMIO is supported */
842 flags = IORESOURCE_MEM;
843 if (zdev->bars[i].val & 8)
844 flags |= IORESOURCE_PREFETCH;
845 if (zdev->bars[i].val & 4)
846 flags |= IORESOURCE_MEM_64;
848 addr = ZPCI_IOMAP_ADDR_BASE + ((u64) entry << 48);
850 size = 1UL << zdev->bars[i].size;
852 res = zpci_alloc_bus_resource(addr, size, flags, zdev->domain);
854 zpci_free_iomap(zdev, entry);
857 pci_add_resource(&resources, res);
860 zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops,
865 zdev->bus->max_bus_speed = zdev->max_bus_speed;
869 static int zpci_alloc_domain(struct zpci_dev *zdev)
871 spin_lock(&zpci_domain_lock);
872 zdev->domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES);
873 if (zdev->domain == ZPCI_NR_DEVICES) {
874 spin_unlock(&zpci_domain_lock);
877 set_bit(zdev->domain, zpci_domain);
878 spin_unlock(&zpci_domain_lock);
882 static void zpci_free_domain(struct zpci_dev *zdev)
884 spin_lock(&zpci_domain_lock);
885 clear_bit(zdev->domain, zpci_domain);
886 spin_unlock(&zpci_domain_lock);
889 int zpci_enable_device(struct zpci_dev *zdev)
893 rc = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
896 pr_info("Enabled fh: 0x%x fid: 0x%x\n", zdev->fh, zdev->fid);
898 rc = zpci_dma_init_device(zdev);
904 clp_disable_fh(zdev);
908 EXPORT_SYMBOL_GPL(zpci_enable_device);
910 int zpci_disable_device(struct zpci_dev *zdev)
912 zpci_dma_exit_device(zdev);
913 return clp_disable_fh(zdev);
915 EXPORT_SYMBOL_GPL(zpci_disable_device);
917 int zpci_create_device(struct zpci_dev *zdev)
921 rc = zpci_alloc_domain(zdev);
925 if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
926 rc = zpci_enable_device(zdev);
930 zdev->state = ZPCI_FN_STATE_ONLINE;
932 rc = zpci_scan_bus(zdev);
936 mutex_lock(&zpci_list_lock);
937 list_add_tail(&zdev->entry, &zpci_list);
939 hotplug_ops->create_slot(zdev);
940 mutex_unlock(&zpci_list_lock);
945 if (zdev->state == ZPCI_FN_STATE_ONLINE)
946 zpci_disable_device(zdev);
948 zpci_free_domain(zdev);
953 void zpci_stop_device(struct zpci_dev *zdev)
955 zpci_dma_exit_device(zdev);
957 * Note: SCLP disables fh via set-pci-fn so don't
961 EXPORT_SYMBOL_GPL(zpci_stop_device);
963 static inline int barsize(u8 size)
965 return (size) ? (1 << size) >> 10 : 0;
968 static int zpci_mem_init(void)
970 zdev_irq_cache = kmem_cache_create("PCI_IRQ_cache", sizeof(struct zdev_irq_map),
971 L1_CACHE_BYTES, SLAB_HWCACHE_ALIGN, NULL);
975 zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb),
980 /* TODO: use realloc */
981 zpci_iomap_start = kzalloc(ZPCI_IOMAP_MAX_ENTRIES * sizeof(*zpci_iomap_start),
983 if (!zpci_iomap_start)
988 kmem_cache_destroy(zdev_fmb_cache);
990 kmem_cache_destroy(zdev_irq_cache);
995 static void zpci_mem_exit(void)
997 kfree(zpci_iomap_start);
998 kmem_cache_destroy(zdev_irq_cache);
999 kmem_cache_destroy(zdev_fmb_cache);
1002 void zpci_register_hp_ops(struct pci_hp_callback_ops *ops)
1004 mutex_lock(&zpci_list_lock);
1006 mutex_unlock(&zpci_list_lock);
1008 EXPORT_SYMBOL_GPL(zpci_register_hp_ops);
1010 void zpci_deregister_hp_ops(void)
1012 mutex_lock(&zpci_list_lock);
1014 mutex_unlock(&zpci_list_lock);
1016 EXPORT_SYMBOL_GPL(zpci_deregister_hp_ops);
1018 unsigned int s390_pci_probe;
1019 EXPORT_SYMBOL_GPL(s390_pci_probe);
1021 char * __init pcibios_setup(char *str)
1023 if (!strcmp(str, "on")) {
1030 static int __init pci_base_init(void)
1034 if (!s390_pci_probe)
1037 if (!test_facility(2) || !test_facility(69)
1038 || !test_facility(71) || !test_facility(72))
1041 pr_info("Probing PCI hardware: PCI:%d SID:%d AEN:%d\n",
1042 test_facility(69), test_facility(70),
1045 rc = zpci_debug_init();
1049 rc = zpci_mem_init();
1053 rc = zpci_msihash_init();
1057 rc = zpci_irq_init();
1061 rc = zpci_dma_init();
1065 rc = clp_find_pci_devices();
1076 zpci_msihash_exit();
1083 subsys_initcall(pci_base_init);