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
, irq
, msi_vecs
;
406 struct msi_desc
*msi
;
410 if (type
!= PCI_CAP_ID_MSIX
&& type
!= PCI_CAP_ID_MSI
)
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 struct zpci_dev
*zpci_alloc_device(void)
535 struct zpci_dev
*zdev
;
537 /* Alloc memory for our private pci device data */
538 zdev
= kzalloc(sizeof(*zdev
), GFP_KERNEL
);
539 return zdev
? : ERR_PTR(-ENOMEM
);
542 void zpci_free_device(struct zpci_dev
*zdev
)
547 int pcibios_add_platform_entries(struct pci_dev
*pdev
)
549 return zpci_sysfs_add_device(&pdev
->dev
);
552 static int __init
zpci_irq_init(void)
556 rc
= register_adapter_interrupt(&zpci_airq
);
559 /* Set summary to 1 to be called every time for the ISC. */
560 *zpci_airq
.lsi_ptr
= 1;
563 zpci_aisb_iv
= airq_iv_create(ZPCI_NR_DEVICES
, AIRQ_IV_ALLOC
);
567 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE
, NULL
, PCI_ISC
);
571 unregister_adapter_interrupt(&zpci_airq
);
576 static void zpci_irq_exit(void)
578 airq_iv_release(zpci_aisb_iv
);
579 unregister_adapter_interrupt(&zpci_airq
);
582 static struct resource
*zpci_alloc_bus_resource(unsigned long start
, unsigned long size
,
583 unsigned long flags
, int domain
)
589 r
= kzalloc(sizeof(*r
), GFP_KERNEL
);
591 return ERR_PTR(-ENOMEM
);
593 r
->end
= r
->start
+ size
- 1;
595 r
->parent
= &iomem_resource
;
596 name
= kmalloc(18, GFP_KERNEL
);
599 return ERR_PTR(-ENOMEM
);
601 sprintf(name
, "PCI Bus: %04x:%02x", domain
, ZPCI_BUS_NR
);
604 rc
= request_resource(&iomem_resource
, r
);
608 return ERR_PTR(-ENOMEM
);
613 static int zpci_alloc_iomap(struct zpci_dev
*zdev
)
617 spin_lock(&zpci_iomap_lock
);
618 entry
= find_first_zero_bit(zpci_iomap
, ZPCI_IOMAP_MAX_ENTRIES
);
619 if (entry
== ZPCI_IOMAP_MAX_ENTRIES
) {
620 spin_unlock(&zpci_iomap_lock
);
623 set_bit(entry
, zpci_iomap
);
624 spin_unlock(&zpci_iomap_lock
);
628 static void zpci_free_iomap(struct zpci_dev
*zdev
, int entry
)
630 spin_lock(&zpci_iomap_lock
);
631 memset(&zpci_iomap_start
[entry
], 0, sizeof(struct zpci_iomap_entry
));
632 clear_bit(entry
, zpci_iomap
);
633 spin_unlock(&zpci_iomap_lock
);
636 int pcibios_add_device(struct pci_dev
*pdev
)
638 struct zpci_dev
*zdev
= get_zdev(pdev
);
639 struct resource
*res
;
643 zpci_map_resources(zdev
);
645 for (i
= 0; i
< PCI_BAR_COUNT
; i
++) {
646 res
= &pdev
->resource
[i
];
647 if (res
->parent
|| !res
->flags
)
649 pci_claim_resource(pdev
, i
);
655 int pcibios_enable_device(struct pci_dev
*pdev
, int mask
)
657 struct zpci_dev
*zdev
= get_zdev(pdev
);
658 struct resource
*res
;
663 zpci_debug_init_device(zdev
);
664 zpci_fmb_enable_device(zdev
);
665 zpci_map_resources(zdev
);
667 pci_read_config_word(pdev
, PCI_COMMAND
, &cmd
);
668 for (i
= 0; i
< PCI_BAR_COUNT
; i
++) {
669 res
= &pdev
->resource
[i
];
671 if (res
->flags
& IORESOURCE_IO
)
674 if (res
->flags
& IORESOURCE_MEM
)
675 cmd
|= PCI_COMMAND_MEMORY
;
677 pci_write_config_word(pdev
, PCI_COMMAND
, cmd
);
681 void pcibios_disable_device(struct pci_dev
*pdev
)
683 struct zpci_dev
*zdev
= get_zdev(pdev
);
685 zpci_unmap_resources(zdev
);
686 zpci_fmb_disable_device(zdev
);
687 zpci_debug_exit_device(zdev
);
691 #ifdef CONFIG_HIBERNATE_CALLBACKS
692 static int zpci_restore(struct device
*dev
)
694 struct zpci_dev
*zdev
= get_zdev(to_pci_dev(dev
));
697 if (zdev
->state
!= ZPCI_FN_STATE_ONLINE
)
700 ret
= clp_enable_fh(zdev
, ZPCI_NR_DMA_SPACES
);
704 zpci_map_resources(zdev
);
705 zpci_register_ioat(zdev
, 0, zdev
->start_dma
+ PAGE_OFFSET
,
706 zdev
->start_dma
+ zdev
->iommu_size
- 1,
707 (u64
) zdev
->dma_table
);
713 static int zpci_freeze(struct device
*dev
)
715 struct zpci_dev
*zdev
= get_zdev(to_pci_dev(dev
));
717 if (zdev
->state
!= ZPCI_FN_STATE_ONLINE
)
720 zpci_unregister_ioat(zdev
, 0);
721 return clp_disable_fh(zdev
);
724 struct dev_pm_ops pcibios_pm_ops
= {
725 .thaw_noirq
= zpci_restore
,
726 .freeze_noirq
= zpci_freeze
,
727 .restore_noirq
= zpci_restore
,
728 .poweroff_noirq
= zpci_freeze
,
730 #endif /* CONFIG_HIBERNATE_CALLBACKS */
732 static int zpci_scan_bus(struct zpci_dev
*zdev
)
734 struct resource
*res
;
735 LIST_HEAD(resources
);
738 /* allocate mapping entry for each used bar */
739 for (i
= 0; i
< PCI_BAR_COUNT
; i
++) {
740 unsigned long addr
, size
, flags
;
743 if (!zdev
->bars
[i
].size
)
745 entry
= zpci_alloc_iomap(zdev
);
748 zdev
->bars
[i
].map_idx
= entry
;
750 /* only MMIO is supported */
751 flags
= IORESOURCE_MEM
;
752 if (zdev
->bars
[i
].val
& 8)
753 flags
|= IORESOURCE_PREFETCH
;
754 if (zdev
->bars
[i
].val
& 4)
755 flags
|= IORESOURCE_MEM_64
;
757 addr
= ZPCI_IOMAP_ADDR_BASE
+ ((u64
) entry
<< 48);
759 size
= 1UL << zdev
->bars
[i
].size
;
761 res
= zpci_alloc_bus_resource(addr
, size
, flags
, zdev
->domain
);
763 zpci_free_iomap(zdev
, entry
);
766 pci_add_resource(&resources
, res
);
769 zdev
->bus
= pci_scan_root_bus(NULL
, ZPCI_BUS_NR
, &pci_root_ops
,
774 zdev
->bus
->max_bus_speed
= zdev
->max_bus_speed
;
778 static int zpci_alloc_domain(struct zpci_dev
*zdev
)
780 spin_lock(&zpci_domain_lock
);
781 zdev
->domain
= find_first_zero_bit(zpci_domain
, ZPCI_NR_DEVICES
);
782 if (zdev
->domain
== ZPCI_NR_DEVICES
) {
783 spin_unlock(&zpci_domain_lock
);
786 set_bit(zdev
->domain
, zpci_domain
);
787 spin_unlock(&zpci_domain_lock
);
791 static void zpci_free_domain(struct zpci_dev
*zdev
)
793 spin_lock(&zpci_domain_lock
);
794 clear_bit(zdev
->domain
, zpci_domain
);
795 spin_unlock(&zpci_domain_lock
);
798 int zpci_enable_device(struct zpci_dev
*zdev
)
802 rc
= clp_enable_fh(zdev
, ZPCI_NR_DMA_SPACES
);
806 rc
= zpci_dma_init_device(zdev
);
810 zdev
->state
= ZPCI_FN_STATE_ONLINE
;
814 clp_disable_fh(zdev
);
818 EXPORT_SYMBOL_GPL(zpci_enable_device
);
820 int zpci_disable_device(struct zpci_dev
*zdev
)
822 zpci_dma_exit_device(zdev
);
823 return clp_disable_fh(zdev
);
825 EXPORT_SYMBOL_GPL(zpci_disable_device
);
827 int zpci_create_device(struct zpci_dev
*zdev
)
831 rc
= zpci_alloc_domain(zdev
);
835 if (zdev
->state
== ZPCI_FN_STATE_CONFIGURED
) {
836 rc
= zpci_enable_device(zdev
);
840 rc
= zpci_scan_bus(zdev
);
844 spin_lock(&zpci_list_lock
);
845 list_add_tail(&zdev
->entry
, &zpci_list
);
846 spin_unlock(&zpci_list_lock
);
848 zpci_init_slot(zdev
);
853 if (zdev
->state
== ZPCI_FN_STATE_ONLINE
)
854 zpci_disable_device(zdev
);
856 zpci_free_domain(zdev
);
861 void zpci_stop_device(struct zpci_dev
*zdev
)
863 zpci_dma_exit_device(zdev
);
865 * Note: SCLP disables fh via set-pci-fn so don't
869 EXPORT_SYMBOL_GPL(zpci_stop_device
);
871 static inline int barsize(u8 size
)
873 return (size
) ? (1 << size
) >> 10 : 0;
876 static int zpci_mem_init(void)
878 zdev_fmb_cache
= kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb
),
883 /* TODO: use realloc */
884 zpci_iomap_start
= kzalloc(ZPCI_IOMAP_MAX_ENTRIES
* sizeof(*zpci_iomap_start
),
886 if (!zpci_iomap_start
)
891 kmem_cache_destroy(zdev_fmb_cache
);
896 static void zpci_mem_exit(void)
898 kfree(zpci_iomap_start
);
899 kmem_cache_destroy(zdev_fmb_cache
);
902 static unsigned int s390_pci_probe
;
904 char * __init
pcibios_setup(char *str
)
906 if (!strcmp(str
, "on")) {
913 static int __init
pci_base_init(void)
920 if (!test_facility(2) || !test_facility(69)
921 || !test_facility(71) || !test_facility(72))
924 rc
= zpci_debug_init();
928 rc
= zpci_mem_init();
932 rc
= zpci_irq_init();
936 rc
= zpci_dma_init();
940 rc
= clp_scan_pci_devices();
957 subsys_initcall_sync(pci_base_init
);
959 void zpci_rescan(void)
961 clp_rescan_pci_devices_simple();