1 /* pci.c: UltraSparc PCI controller support.
3 * Copyright (C) 1997, 1998, 1999 David S. Miller (davem@redhat.com)
4 * Copyright (C) 1998, 1999 Eddie C. Dost (ecd@skynet.be)
5 * Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz)
7 * OF tree based PCI bus probing taken from the PowerPC port
8 * with minor modifications, see there for credits.
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/string.h>
14 #include <linux/sched.h>
15 #include <linux/capability.h>
16 #include <linux/errno.h>
17 #include <linux/smp_lock.h>
18 #include <linux/msi.h>
19 #include <linux/irq.h>
20 #include <linux/init.h>
22 #include <asm/uaccess.h>
24 #include <asm/pgtable.h>
33 unsigned long pci_memspace_mask
= 0xffffffffUL
;
36 /* A "nop" PCI implementation. */
37 asmlinkage
int sys_pciconfig_read(unsigned long bus
, unsigned long dfn
,
38 unsigned long off
, unsigned long len
,
43 asmlinkage
int sys_pciconfig_write(unsigned long bus
, unsigned long dfn
,
44 unsigned long off
, unsigned long len
,
51 /* List of all PCI controllers found in the system. */
52 struct pci_controller_info
*pci_controller_root
= NULL
;
54 /* Each PCI controller found gets a unique index. */
55 int pci_num_controllers
= 0;
57 volatile int pci_poke_in_progress
;
58 volatile int pci_poke_cpu
= -1;
59 volatile int pci_poke_faulted
;
61 static DEFINE_SPINLOCK(pci_poke_lock
);
63 void pci_config_read8(u8
*addr
, u8
*ret
)
68 spin_lock_irqsave(&pci_poke_lock
, flags
);
69 pci_poke_cpu
= smp_processor_id();
70 pci_poke_in_progress
= 1;
72 __asm__
__volatile__("membar #Sync\n\t"
73 "lduba [%1] %2, %0\n\t"
76 : "r" (addr
), "i" (ASI_PHYS_BYPASS_EC_E_L
)
78 pci_poke_in_progress
= 0;
80 if (!pci_poke_faulted
)
82 spin_unlock_irqrestore(&pci_poke_lock
, flags
);
85 void pci_config_read16(u16
*addr
, u16
*ret
)
90 spin_lock_irqsave(&pci_poke_lock
, flags
);
91 pci_poke_cpu
= smp_processor_id();
92 pci_poke_in_progress
= 1;
94 __asm__
__volatile__("membar #Sync\n\t"
95 "lduha [%1] %2, %0\n\t"
98 : "r" (addr
), "i" (ASI_PHYS_BYPASS_EC_E_L
)
100 pci_poke_in_progress
= 0;
102 if (!pci_poke_faulted
)
104 spin_unlock_irqrestore(&pci_poke_lock
, flags
);
107 void pci_config_read32(u32
*addr
, u32
*ret
)
112 spin_lock_irqsave(&pci_poke_lock
, flags
);
113 pci_poke_cpu
= smp_processor_id();
114 pci_poke_in_progress
= 1;
115 pci_poke_faulted
= 0;
116 __asm__
__volatile__("membar #Sync\n\t"
117 "lduwa [%1] %2, %0\n\t"
120 : "r" (addr
), "i" (ASI_PHYS_BYPASS_EC_E_L
)
122 pci_poke_in_progress
= 0;
124 if (!pci_poke_faulted
)
126 spin_unlock_irqrestore(&pci_poke_lock
, flags
);
129 void pci_config_write8(u8
*addr
, u8 val
)
133 spin_lock_irqsave(&pci_poke_lock
, flags
);
134 pci_poke_cpu
= smp_processor_id();
135 pci_poke_in_progress
= 1;
136 pci_poke_faulted
= 0;
137 __asm__
__volatile__("membar #Sync\n\t"
138 "stba %0, [%1] %2\n\t"
141 : "r" (val
), "r" (addr
), "i" (ASI_PHYS_BYPASS_EC_E_L
)
143 pci_poke_in_progress
= 0;
145 spin_unlock_irqrestore(&pci_poke_lock
, flags
);
148 void pci_config_write16(u16
*addr
, u16 val
)
152 spin_lock_irqsave(&pci_poke_lock
, flags
);
153 pci_poke_cpu
= smp_processor_id();
154 pci_poke_in_progress
= 1;
155 pci_poke_faulted
= 0;
156 __asm__
__volatile__("membar #Sync\n\t"
157 "stha %0, [%1] %2\n\t"
160 : "r" (val
), "r" (addr
), "i" (ASI_PHYS_BYPASS_EC_E_L
)
162 pci_poke_in_progress
= 0;
164 spin_unlock_irqrestore(&pci_poke_lock
, flags
);
167 void pci_config_write32(u32
*addr
, u32 val
)
171 spin_lock_irqsave(&pci_poke_lock
, flags
);
172 pci_poke_cpu
= smp_processor_id();
173 pci_poke_in_progress
= 1;
174 pci_poke_faulted
= 0;
175 __asm__
__volatile__("membar #Sync\n\t"
176 "stwa %0, [%1] %2\n\t"
179 : "r" (val
), "r" (addr
), "i" (ASI_PHYS_BYPASS_EC_E_L
)
181 pci_poke_in_progress
= 0;
183 spin_unlock_irqrestore(&pci_poke_lock
, flags
);
186 /* Probe for all PCI controllers in the system. */
187 extern void sabre_init(struct device_node
*, const char *);
188 extern void psycho_init(struct device_node
*, const char *);
189 extern void schizo_init(struct device_node
*, const char *);
190 extern void schizo_plus_init(struct device_node
*, const char *);
191 extern void tomatillo_init(struct device_node
*, const char *);
192 extern void sun4v_pci_init(struct device_node
*, const char *);
196 void (*init
)(struct device_node
*, const char *);
197 } pci_controller_table
[] __initdata
= {
198 { "SUNW,sabre", sabre_init
},
199 { "pci108e,a000", sabre_init
},
200 { "pci108e,a001", sabre_init
},
201 { "SUNW,psycho", psycho_init
},
202 { "pci108e,8000", psycho_init
},
203 { "SUNW,schizo", schizo_init
},
204 { "pci108e,8001", schizo_init
},
205 { "SUNW,schizo+", schizo_plus_init
},
206 { "pci108e,8002", schizo_plus_init
},
207 { "SUNW,tomatillo", tomatillo_init
},
208 { "pci108e,a801", tomatillo_init
},
209 { "SUNW,sun4v-pci", sun4v_pci_init
},
211 #define PCI_NUM_CONTROLLER_TYPES (sizeof(pci_controller_table) / \
212 sizeof(pci_controller_table[0]))
214 static int __init
pci_controller_init(const char *model_name
, int namelen
, struct device_node
*dp
)
218 for (i
= 0; i
< PCI_NUM_CONTROLLER_TYPES
; i
++) {
219 if (!strncmp(model_name
,
220 pci_controller_table
[i
].model_name
,
222 pci_controller_table
[i
].init(dp
, model_name
);
230 static int __init
pci_is_controller(const char *model_name
, int namelen
, struct device_node
*dp
)
234 for (i
= 0; i
< PCI_NUM_CONTROLLER_TYPES
; i
++) {
235 if (!strncmp(model_name
,
236 pci_controller_table
[i
].model_name
,
244 static int __init
pci_controller_scan(int (*handler
)(const char *, int, struct device_node
*))
246 struct device_node
*dp
;
249 for_each_node_by_name(dp
, "pci") {
250 struct property
*prop
;
253 prop
= of_find_property(dp
, "model", &len
);
255 prop
= of_find_property(dp
, "compatible", &len
);
258 const char *model
= prop
->value
;
261 /* Our value may be a multi-valued string in the
262 * case of some compatible properties. For sanity,
263 * only try the first one.
265 while (model
[item_len
] && len
) {
270 if (handler(model
, item_len
, dp
))
279 /* Is there some PCI controller in the system? */
280 int __init
pcic_present(void)
282 return pci_controller_scan(pci_is_controller
);
285 const struct pci_iommu_ops
*pci_iommu_ops
;
286 EXPORT_SYMBOL(pci_iommu_ops
);
288 extern const struct pci_iommu_ops pci_sun4u_iommu_ops
,
291 /* Find each controller in the system, attach and initialize
292 * software state structure for each and link into the
293 * pci_controller_root. Setup the controller enough such
294 * that bus scanning can be done.
296 static void __init
pci_controller_probe(void)
298 if (tlb_type
== hypervisor
)
299 pci_iommu_ops
= &pci_sun4v_iommu_ops
;
301 pci_iommu_ops
= &pci_sun4u_iommu_ops
;
303 printk("PCI: Probing for controllers.\n");
305 pci_controller_scan(pci_controller_init
);
308 static unsigned long pci_parse_of_flags(u32 addr0
)
310 unsigned long flags
= 0;
312 if (addr0
& 0x02000000) {
313 flags
= IORESOURCE_MEM
| PCI_BASE_ADDRESS_SPACE_MEMORY
;
314 flags
|= (addr0
>> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64
;
315 flags
|= (addr0
>> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M
;
316 if (addr0
& 0x40000000)
317 flags
|= IORESOURCE_PREFETCH
318 | PCI_BASE_ADDRESS_MEM_PREFETCH
;
319 } else if (addr0
& 0x01000000)
320 flags
= IORESOURCE_IO
| PCI_BASE_ADDRESS_SPACE_IO
;
324 /* The of_device layer has translated all of the assigned-address properties
325 * into physical address resources, we only have to figure out the register
328 static void pci_parse_of_addrs(struct of_device
*op
,
329 struct device_node
*node
,
332 struct resource
*op_res
;
336 addrs
= of_get_property(node
, "assigned-addresses", &proplen
);
339 printk(" parse addresses (%d bytes) @ %p\n", proplen
, addrs
);
340 op_res
= &op
->resource
[0];
341 for (; proplen
>= 20; proplen
-= 20, addrs
+= 5, op_res
++) {
342 struct resource
*res
;
346 flags
= pci_parse_of_flags(addrs
[0]);
350 printk(" start: %lx, end: %lx, i: %x\n",
351 op_res
->start
, op_res
->end
, i
);
353 if (PCI_BASE_ADDRESS_0
<= i
&& i
<= PCI_BASE_ADDRESS_5
) {
354 res
= &dev
->resource
[(i
- PCI_BASE_ADDRESS_0
) >> 2];
355 } else if (i
== dev
->rom_base_reg
) {
356 res
= &dev
->resource
[PCI_ROM_RESOURCE
];
357 flags
|= IORESOURCE_READONLY
| IORESOURCE_CACHEABLE
;
359 printk(KERN_ERR
"PCI: bad cfg reg num 0x%x\n", i
);
362 res
->start
= op_res
->start
;
363 res
->end
= op_res
->end
;
365 res
->name
= pci_name(dev
);
369 struct pci_dev
*of_create_pci_dev(struct pci_pbm_info
*pbm
,
370 struct device_node
*node
,
371 struct pci_bus
*bus
, int devfn
,
374 struct dev_archdata
*sd
;
379 dev
= kzalloc(sizeof(struct pci_dev
), GFP_KERNEL
);
383 sd
= &dev
->dev
.archdata
;
384 sd
->iommu
= pbm
->iommu
;
386 sd
->host_controller
= pbm
;
387 sd
->prom_node
= node
;
388 sd
->op
= of_find_device_by_node(node
);
389 sd
->msi_num
= 0xffffffff;
391 type
= of_get_property(node
, "device_type", NULL
);
395 printk(" create device, devfn: %x, type: %s hostcontroller(%d)\n",
396 devfn
, type
, host_controller
);
400 dev
->dev
.parent
= bus
->bridge
;
401 dev
->dev
.bus
= &pci_bus_type
;
403 dev
->multifunction
= 0; /* maybe a lie? */
405 if (host_controller
) {
406 dev
->vendor
= 0x108e;
407 dev
->device
= 0x8000;
408 dev
->subsystem_vendor
= 0x0000;
409 dev
->subsystem_device
= 0x0000;
411 dev
->class = PCI_CLASS_BRIDGE_HOST
<< 8;
412 sprintf(pci_name(dev
), "%04x:%02x:%02x.%d", pci_domain_nr(bus
),
413 0x00, PCI_SLOT(devfn
), PCI_FUNC(devfn
));
415 dev
->vendor
= of_getintprop_default(node
, "vendor-id", 0xffff);
416 dev
->device
= of_getintprop_default(node
, "device-id", 0xffff);
417 dev
->subsystem_vendor
=
418 of_getintprop_default(node
, "subsystem-vendor-id", 0);
419 dev
->subsystem_device
=
420 of_getintprop_default(node
, "subsystem-id", 0);
422 dev
->cfg_size
= pci_cfg_space_size(dev
);
424 /* We can't actually use the firmware value, we have
425 * to read what is in the register right now. One
426 * reason is that in the case of IDE interfaces the
427 * firmware can sample the value before the the IDE
428 * interface is programmed into native mode.
430 pci_read_config_dword(dev
, PCI_CLASS_REVISION
, &class);
431 dev
->class = class >> 8;
433 sprintf(pci_name(dev
), "%04x:%02x:%02x.%d", pci_domain_nr(bus
),
434 dev
->bus
->number
, PCI_SLOT(devfn
), PCI_FUNC(devfn
));
436 printk(" class: 0x%x device name: %s\n",
437 dev
->class, pci_name(dev
));
439 dev
->current_state
= 4; /* unknown power state */
440 dev
->error_state
= pci_channel_io_normal
;
442 if (host_controller
) {
443 dev
->hdr_type
= PCI_HEADER_TYPE_BRIDGE
;
444 dev
->rom_base_reg
= PCI_ROM_ADDRESS1
;
445 dev
->irq
= PCI_IRQ_NONE
;
447 if (!strcmp(type
, "pci") || !strcmp(type
, "pciex")) {
448 /* a PCI-PCI bridge */
449 dev
->hdr_type
= PCI_HEADER_TYPE_BRIDGE
;
450 dev
->rom_base_reg
= PCI_ROM_ADDRESS1
;
451 } else if (!strcmp(type
, "cardbus")) {
452 dev
->hdr_type
= PCI_HEADER_TYPE_CARDBUS
;
454 dev
->hdr_type
= PCI_HEADER_TYPE_NORMAL
;
455 dev
->rom_base_reg
= PCI_ROM_ADDRESS
;
457 dev
->irq
= sd
->op
->irqs
[0];
458 if (dev
->irq
== 0xffffffff)
459 dev
->irq
= PCI_IRQ_NONE
;
462 pci_parse_of_addrs(sd
->op
, node
, dev
);
464 printk(" adding to system ...\n");
466 pci_device_add(dev
, bus
);
471 static void __init
apb_calc_first_last(u8 map
, u32
*first_p
, u32
*last_p
)
473 u32 idx
, first
, last
;
477 for (idx
= 0; idx
< 8; idx
++) {
478 if ((map
& (1 << idx
)) != 0) {
490 static void __init
pci_resource_adjust(struct resource
*res
,
491 struct resource
*root
)
493 res
->start
+= root
->start
;
494 res
->end
+= root
->start
;
497 /* Cook up fake bus resources for SUNW,simba PCI bridges which lack
498 * a proper 'ranges' property.
500 static void __init
apb_fake_ranges(struct pci_dev
*dev
,
502 struct pci_pbm_info
*pbm
)
504 struct resource
*res
;
508 pci_read_config_byte(dev
, APB_IO_ADDRESS_MAP
, &map
);
509 apb_calc_first_last(map
, &first
, &last
);
510 res
= bus
->resource
[0];
511 res
->start
= (first
<< 21);
512 res
->end
= (last
<< 21) + ((1 << 21) - 1);
513 res
->flags
= IORESOURCE_IO
;
514 pci_resource_adjust(res
, &pbm
->io_space
);
516 pci_read_config_byte(dev
, APB_MEM_ADDRESS_MAP
, &map
);
517 apb_calc_first_last(map
, &first
, &last
);
518 res
= bus
->resource
[1];
519 res
->start
= (first
<< 21);
520 res
->end
= (last
<< 21) + ((1 << 21) - 1);
521 res
->flags
= IORESOURCE_MEM
;
522 pci_resource_adjust(res
, &pbm
->mem_space
);
525 static void __init
pci_of_scan_bus(struct pci_pbm_info
*pbm
,
526 struct device_node
*node
,
527 struct pci_bus
*bus
);
529 #define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1])
531 void __devinit
of_scan_pci_bridge(struct pci_pbm_info
*pbm
,
532 struct device_node
*node
,
536 const u32
*busrange
, *ranges
;
538 struct resource
*res
;
542 printk("of_scan_pci_bridge(%s)\n", node
->full_name
);
544 /* parse bus-range property */
545 busrange
= of_get_property(node
, "bus-range", &len
);
546 if (busrange
== NULL
|| len
!= 8) {
547 printk(KERN_DEBUG
"Can't get bus-range for PCI-PCI bridge %s\n",
551 ranges
= of_get_property(node
, "ranges", &len
);
553 if (ranges
== NULL
) {
554 char *model
= of_get_property(node
, "model", NULL
);
555 if (model
&& !strcmp(model
, "SUNW,simba")) {
558 printk(KERN_DEBUG
"Can't get ranges for PCI-PCI bridge %s\n",
564 bus
= pci_add_new_bus(dev
->bus
, dev
, busrange
[0]);
566 printk(KERN_ERR
"Failed to create pci bus for %s\n",
571 bus
->primary
= dev
->bus
->number
;
572 bus
->subordinate
= busrange
[1];
575 /* parse ranges property, or cook one up by hand for Simba */
576 /* PCI #address-cells == 3 and #size-cells == 2 always */
577 res
= &dev
->resource
[PCI_BRIDGE_RESOURCES
];
578 for (i
= 0; i
< PCI_NUM_RESOURCES
- PCI_BRIDGE_RESOURCES
; ++i
) {
580 bus
->resource
[i
] = res
;
584 apb_fake_ranges(dev
, bus
, pbm
);
588 for (; len
>= 32; len
-= 32, ranges
+= 8) {
589 struct resource
*root
;
591 flags
= pci_parse_of_flags(ranges
[0]);
592 size
= GET_64BIT(ranges
, 6);
593 if (flags
== 0 || size
== 0)
595 if (flags
& IORESOURCE_IO
) {
596 res
= bus
->resource
[0];
598 printk(KERN_ERR
"PCI: ignoring extra I/O range"
599 " for bridge %s\n", node
->full_name
);
602 root
= &pbm
->io_space
;
604 if (i
>= PCI_NUM_RESOURCES
- PCI_BRIDGE_RESOURCES
) {
605 printk(KERN_ERR
"PCI: too many memory ranges"
606 " for bridge %s\n", node
->full_name
);
609 res
= bus
->resource
[i
];
611 root
= &pbm
->mem_space
;
614 res
->start
= GET_64BIT(ranges
, 1);
615 res
->end
= res
->start
+ size
- 1;
618 /* Another way to implement this would be to add an of_device
619 * layer routine that can calculate a resource for a given
620 * range property value in a PCI device.
622 pci_resource_adjust(res
, root
);
625 sprintf(bus
->name
, "PCI Bus %04x:%02x", pci_domain_nr(bus
),
627 printk(" bus name: %s\n", bus
->name
);
629 pci_of_scan_bus(pbm
, node
, bus
);
632 static void __init
pci_of_scan_bus(struct pci_pbm_info
*pbm
,
633 struct device_node
*node
,
636 struct device_node
*child
;
641 printk("PCI: scan_bus[%s] bus no %d\n",
642 node
->full_name
, bus
->number
);
645 while ((child
= of_get_next_child(node
, child
)) != NULL
) {
646 printk(" * %s\n", child
->full_name
);
647 reg
= of_get_property(child
, "reg", ®len
);
648 if (reg
== NULL
|| reglen
< 20)
650 devfn
= (reg
[0] >> 8) & 0xff;
652 /* create a new pci_dev for this device */
653 dev
= of_create_pci_dev(pbm
, child
, bus
, devfn
, 0);
656 printk("PCI: dev header type: %x\n", dev
->hdr_type
);
658 if (dev
->hdr_type
== PCI_HEADER_TYPE_BRIDGE
||
659 dev
->hdr_type
== PCI_HEADER_TYPE_CARDBUS
)
660 of_scan_pci_bridge(pbm
, child
, dev
);
665 show_pciobppath_attr(struct device
* dev
, struct device_attribute
* attr
, char * buf
)
667 struct pci_dev
*pdev
;
668 struct device_node
*dp
;
670 pdev
= to_pci_dev(dev
);
671 dp
= pdev
->dev
.archdata
.prom_node
;
673 return snprintf (buf
, PAGE_SIZE
, "%s\n", dp
->full_name
);
676 static DEVICE_ATTR(obppath
, S_IRUSR
| S_IRGRP
| S_IROTH
, show_pciobppath_attr
, NULL
);
678 static void __devinit
pci_bus_register_of_sysfs(struct pci_bus
*bus
)
681 struct pci_bus
*child_bus
;
684 list_for_each_entry(dev
, &bus
->devices
, bus_list
) {
685 /* we don't really care if we can create this file or
686 * not, but we need to assign the result of the call
687 * or the world will fall under alien invasion and
688 * everybody will be frozen on a spaceship ready to be
689 * eaten on alpha centauri by some green and jelly
692 err
= sysfs_create_file(&dev
->dev
.kobj
, &dev_attr_obppath
.attr
);
694 list_for_each_entry(child_bus
, &bus
->children
, node
)
695 pci_bus_register_of_sysfs(child_bus
);
698 int pci_host_bridge_read_pci_cfg(struct pci_bus
*bus_dev
,
703 static u8 fake_pci_config
[] = {
704 0x8e, 0x10, /* Vendor: 0x108e (Sun) */
705 0x00, 0x80, /* Device: 0x8000 (PBM) */
706 0x46, 0x01, /* Command: 0x0146 (SERR, PARITY, MASTER, MEM) */
707 0xa0, 0x22, /* Status: 0x02a0 (DEVSEL_MED, FB2B, 66MHZ) */
708 0x00, 0x00, 0x00, 0x06, /* Class: 0x06000000 host bridge */
709 0x00, /* Cacheline: 0x00 */
710 0x40, /* Latency: 0x40 */
711 0x00, /* Header-Type: 0x00 normal */
715 if (where
>= 0 && where
< sizeof(fake_pci_config
) &&
716 (where
+ size
) >= 0 &&
717 (where
+ size
) < sizeof(fake_pci_config
) &&
718 size
<= sizeof(u32
)) {
721 *value
|= fake_pci_config
[where
+ size
];
725 return PCIBIOS_SUCCESSFUL
;
728 int pci_host_bridge_write_pci_cfg(struct pci_bus
*bus_dev
,
733 return PCIBIOS_SUCCESSFUL
;
736 struct pci_bus
* __init
pci_scan_one_pbm(struct pci_pbm_info
*pbm
)
738 struct pci_controller_info
*p
= pbm
->parent
;
739 struct device_node
*node
= pbm
->prom_node
;
740 struct pci_dev
*host_pdev
;
743 printk("PCI: Scanning PBM %s\n", node
->full_name
);
745 /* XXX parent device? XXX */
746 bus
= pci_create_bus(NULL
, pbm
->pci_first_busno
, p
->pci_ops
, pbm
);
748 printk(KERN_ERR
"Failed to create bus for %s\n",
752 bus
->secondary
= pbm
->pci_first_busno
;
753 bus
->subordinate
= pbm
->pci_last_busno
;
755 bus
->resource
[0] = &pbm
->io_space
;
756 bus
->resource
[1] = &pbm
->mem_space
;
758 /* Create the dummy host bridge and link it in. */
759 host_pdev
= of_create_pci_dev(pbm
, node
, bus
, 0x00, 1);
760 bus
->self
= host_pdev
;
762 pci_of_scan_bus(pbm
, node
, bus
);
763 pci_bus_add_devices(bus
);
764 pci_bus_register_of_sysfs(bus
);
769 static void __init
pci_scan_each_controller_bus(void)
771 struct pci_controller_info
*p
;
773 for (p
= pci_controller_root
; p
; p
= p
->next
)
777 extern void power_init(void);
779 static int __init
pcibios_init(void)
781 pci_controller_probe();
782 if (pci_controller_root
== NULL
)
785 pci_scan_each_controller_bus();
794 subsys_initcall(pcibios_init
);
796 void __devinit
pcibios_fixup_bus(struct pci_bus
*pbus
)
798 struct pci_pbm_info
*pbm
= pbus
->sysdata
;
800 /* Generic PCI bus probing sets these to point at
801 * &io{port,mem}_resouce which is wrong for us.
803 pbus
->resource
[0] = &pbm
->io_space
;
804 pbus
->resource
[1] = &pbm
->mem_space
;
807 struct resource
*pcibios_select_root(struct pci_dev
*pdev
, struct resource
*r
)
809 struct pci_pbm_info
*pbm
= pdev
->bus
->sysdata
;
810 struct resource
*root
= NULL
;
812 if (r
->flags
& IORESOURCE_IO
)
813 root
= &pbm
->io_space
;
814 if (r
->flags
& IORESOURCE_MEM
)
815 root
= &pbm
->mem_space
;
820 void pcibios_update_irq(struct pci_dev
*pdev
, int irq
)
824 void pcibios_align_resource(void *data
, struct resource
*res
,
825 resource_size_t size
, resource_size_t align
)
829 int pcibios_enable_device(struct pci_dev
*dev
, int mask
)
834 pci_read_config_word(dev
, PCI_COMMAND
, &cmd
);
837 for (i
= 0; i
< PCI_NUM_RESOURCES
; i
++) {
838 struct resource
*res
= &dev
->resource
[i
];
840 /* Only set up the requested stuff */
841 if (!(mask
& (1<<i
)))
844 if (res
->flags
& IORESOURCE_IO
)
845 cmd
|= PCI_COMMAND_IO
;
846 if (res
->flags
& IORESOURCE_MEM
)
847 cmd
|= PCI_COMMAND_MEMORY
;
851 printk(KERN_DEBUG
"PCI: Enabling device: (%s), cmd %x\n",
853 /* Enable the appropriate bits in the PCI command register. */
854 pci_write_config_word(dev
, PCI_COMMAND
, cmd
);
859 void pcibios_resource_to_bus(struct pci_dev
*pdev
, struct pci_bus_region
*region
,
860 struct resource
*res
)
862 struct pci_pbm_info
*pbm
= pdev
->bus
->sysdata
;
863 struct resource zero_res
, *root
;
867 zero_res
.flags
= res
->flags
;
869 if (res
->flags
& IORESOURCE_IO
)
870 root
= &pbm
->io_space
;
872 root
= &pbm
->mem_space
;
874 pci_resource_adjust(&zero_res
, root
);
876 region
->start
= res
->start
- zero_res
.start
;
877 region
->end
= res
->end
- zero_res
.start
;
879 EXPORT_SYMBOL(pcibios_resource_to_bus
);
881 void pcibios_bus_to_resource(struct pci_dev
*pdev
, struct resource
*res
,
882 struct pci_bus_region
*region
)
884 struct pci_pbm_info
*pbm
= pdev
->bus
->sysdata
;
885 struct resource
*root
;
887 res
->start
= region
->start
;
888 res
->end
= region
->end
;
890 if (res
->flags
& IORESOURCE_IO
)
891 root
= &pbm
->io_space
;
893 root
= &pbm
->mem_space
;
895 pci_resource_adjust(res
, root
);
897 EXPORT_SYMBOL(pcibios_bus_to_resource
);
899 char * __devinit
pcibios_setup(char *str
)
904 /* Platform support for /proc/bus/pci/X/Y mmap()s. */
906 /* If the user uses a host-bridge as the PCI device, he may use
907 * this to perform a raw mmap() of the I/O or MEM space behind
910 * This can be useful for execution of x86 PCI bios initialization code
911 * on a PCI card, like the xfree86 int10 stuff does.
913 static int __pci_mmap_make_offset_bus(struct pci_dev
*pdev
, struct vm_area_struct
*vma
,
914 enum pci_mmap_state mmap_state
)
916 struct pci_pbm_info
*pbm
= pdev
->dev
.archdata
.host_controller
;
917 struct pci_controller_info
*p
;
918 unsigned long space_size
, user_offset
, user_size
;
921 if (mmap_state
== pci_mmap_io
) {
922 space_size
= (pbm
->io_space
.end
-
923 pbm
->io_space
.start
) + 1;
925 space_size
= (pbm
->mem_space
.end
-
926 pbm
->mem_space
.start
) + 1;
929 /* Make sure the request is in range. */
930 user_offset
= vma
->vm_pgoff
<< PAGE_SHIFT
;
931 user_size
= vma
->vm_end
- vma
->vm_start
;
933 if (user_offset
>= space_size
||
934 (user_offset
+ user_size
) > space_size
)
937 if (mmap_state
== pci_mmap_io
) {
938 vma
->vm_pgoff
= (pbm
->io_space
.start
+
939 user_offset
) >> PAGE_SHIFT
;
941 vma
->vm_pgoff
= (pbm
->mem_space
.start
+
942 user_offset
) >> PAGE_SHIFT
;
948 /* Adjust vm_pgoff of VMA such that it is the physical page offset corresponding
949 * to the 32-bit pci bus offset for DEV requested by the user.
951 * Basically, the user finds the base address for his device which he wishes
952 * to mmap. They read the 32-bit value from the config space base register,
953 * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
954 * offset parameter of mmap on /proc/bus/pci/XXX for that device.
956 * Returns negative error code on failure, zero on success.
958 static int __pci_mmap_make_offset(struct pci_dev
*dev
, struct vm_area_struct
*vma
,
959 enum pci_mmap_state mmap_state
)
961 unsigned long user_offset
= vma
->vm_pgoff
<< PAGE_SHIFT
;
962 unsigned long user32
= user_offset
& pci_memspace_mask
;
963 unsigned long largest_base
, this_base
, addr32
;
966 if ((dev
->class >> 8) == PCI_CLASS_BRIDGE_HOST
)
967 return __pci_mmap_make_offset_bus(dev
, vma
, mmap_state
);
969 /* Figure out which base address this is for. */
971 for (i
= 0; i
<= PCI_ROM_RESOURCE
; i
++) {
972 struct resource
*rp
= &dev
->resource
[i
];
979 if (i
== PCI_ROM_RESOURCE
) {
980 if (mmap_state
!= pci_mmap_mem
)
983 if ((mmap_state
== pci_mmap_io
&&
984 (rp
->flags
& IORESOURCE_IO
) == 0) ||
985 (mmap_state
== pci_mmap_mem
&&
986 (rp
->flags
& IORESOURCE_MEM
) == 0))
990 this_base
= rp
->start
;
992 addr32
= (this_base
& PAGE_MASK
) & pci_memspace_mask
;
994 if (mmap_state
== pci_mmap_io
)
997 if (addr32
<= user32
&& this_base
> largest_base
)
998 largest_base
= this_base
;
1001 if (largest_base
== 0UL)
1004 /* Now construct the final physical address. */
1005 if (mmap_state
== pci_mmap_io
)
1006 vma
->vm_pgoff
= (((largest_base
& ~0xffffffUL
) | user32
) >> PAGE_SHIFT
);
1008 vma
->vm_pgoff
= (((largest_base
& ~(pci_memspace_mask
)) | user32
) >> PAGE_SHIFT
);
1013 /* Set vm_flags of VMA, as appropriate for this architecture, for a pci device
1016 static void __pci_mmap_set_flags(struct pci_dev
*dev
, struct vm_area_struct
*vma
,
1017 enum pci_mmap_state mmap_state
)
1019 vma
->vm_flags
|= (VM_IO
| VM_RESERVED
);
1022 /* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
1025 static void __pci_mmap_set_pgprot(struct pci_dev
*dev
, struct vm_area_struct
*vma
,
1026 enum pci_mmap_state mmap_state
)
1028 /* Our io_remap_pfn_range takes care of this, do nothing. */
1031 /* Perform the actual remap of the pages for a PCI device mapping, as appropriate
1032 * for this architecture. The region in the process to map is described by vm_start
1033 * and vm_end members of VMA, the base physical address is found in vm_pgoff.
1034 * The pci device structure is provided so that architectures may make mapping
1035 * decisions on a per-device or per-bus basis.
1037 * Returns a negative error code on failure, zero on success.
1039 int pci_mmap_page_range(struct pci_dev
*dev
, struct vm_area_struct
*vma
,
1040 enum pci_mmap_state mmap_state
,
1045 ret
= __pci_mmap_make_offset(dev
, vma
, mmap_state
);
1049 __pci_mmap_set_flags(dev
, vma
, mmap_state
);
1050 __pci_mmap_set_pgprot(dev
, vma
, mmap_state
);
1052 vma
->vm_page_prot
= pgprot_noncached(vma
->vm_page_prot
);
1053 ret
= io_remap_pfn_range(vma
, vma
->vm_start
,
1055 vma
->vm_end
- vma
->vm_start
,
1063 /* Return the domain nuber for this pci bus */
1065 int pci_domain_nr(struct pci_bus
*pbus
)
1067 struct pci_pbm_info
*pbm
= pbus
->sysdata
;
1070 if (pbm
== NULL
|| pbm
->parent
== NULL
) {
1073 struct pci_controller_info
*p
= pbm
->parent
;
1077 ((pbm
== &pbm
->parent
->pbm_B
) ? 1 : 0));
1082 EXPORT_SYMBOL(pci_domain_nr
);
1084 #ifdef CONFIG_PCI_MSI
1085 int arch_setup_msi_irq(struct pci_dev
*pdev
, struct msi_desc
*desc
)
1087 struct pci_pbm_info
*pbm
= pdev
->dev
.archdata
.host_controller
;
1088 struct pci_controller_info
*p
= pbm
->parent
;
1091 if (!pbm
->msi_num
|| !p
->setup_msi_irq
)
1094 err
= p
->setup_msi_irq(&virt_irq
, pdev
, desc
);
1101 void arch_teardown_msi_irq(unsigned int virt_irq
)
1103 struct msi_desc
*entry
= get_irq_msi(virt_irq
);
1104 struct pci_dev
*pdev
= entry
->dev
;
1105 struct pci_pbm_info
*pbm
= pdev
->dev
.archdata
.host_controller
;
1106 struct pci_controller_info
*p
= pbm
->parent
;
1108 if (!pbm
->msi_num
|| !p
->setup_msi_irq
)
1111 return p
->teardown_msi_irq(virt_irq
, pdev
);
1113 #endif /* !(CONFIG_PCI_MSI) */
1115 struct device_node
*pci_device_to_OF_node(struct pci_dev
*pdev
)
1117 return pdev
->dev
.archdata
.prom_node
;
1119 EXPORT_SYMBOL(pci_device_to_OF_node
);
1121 #endif /* !(CONFIG_PCI) */