1 // SPDX-License-Identifier: GPL-2.0
41 volatile int pci_poke_cpu = -1;
62 	pci_poke_cpu = -1;  in pci_config_read8()
84 	pci_poke_cpu = -1;  in pci_config_read16()
106 	pci_poke_cpu = -1;  in pci_config_read32()
127 	pci_poke_cpu = -1;  in pci_config_write8()
146 	pci_poke_cpu = -1;  in pci_config_write16()
165 	pci_poke_cpu = -1;  in pci_config_write32()
201 /* The of_device layer has translated all of the assigned-address properties
213 	addrs = of_get_property(node, "assigned-addresses", &proplen);  in pci_parse_of_addrs()
219 	op_res = &op->resource[0];  in pci_parse_of_addrs()
220 	for (; proplen >= 20; proplen -= 20, addrs += 5, op_res++) {  in pci_parse_of_addrs()
231 				 op_res->start, op_res->end, i);  in pci_parse_of_addrs()
234 			res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];  in pci_parse_of_addrs()
235 		} else if (i == dev->rom_base_reg) {  in pci_parse_of_addrs()
236 			res = &dev->resource[PCI_ROM_RESOURCE];  in pci_parse_of_addrs()
242 		res->start = op_res->start;  in pci_parse_of_addrs()
243 		res->end = op_res->end;  in pci_parse_of_addrs()
244 		res->flags = flags;  in pci_parse_of_addrs()
245 		res->name = pci_name(dev);  in pci_parse_of_addrs()
256 	sd->iommu = iommu;  in pci_init_dev_archdata()
257 	sd->stc = stc;  in pci_init_dev_archdata()
258 	sd->host_controller = host_controller;  in pci_init_dev_archdata()
259 	sd->op = op;  in pci_init_dev_archdata()
260 	sd->numa_node = numa_node;  in pci_init_dev_archdata()
277 	sd = &dev->dev.archdata;  in of_create_pci_dev()
278 	pci_init_dev_archdata(sd, pbm->iommu, &pbm->stc, pbm, op,  in of_create_pci_dev()
279 			      pbm->numa_node);  in of_create_pci_dev()
280 	sd = &op->dev.archdata;  in of_create_pci_dev()
281 	sd->iommu = pbm->iommu;  in of_create_pci_dev()
282 	sd->stc = &pbm->stc;  in of_create_pci_dev()
283 	sd->numa_node = pbm->numa_node;  in of_create_pci_dev()
292 	dev->sysdata = node;  in of_create_pci_dev()
293 	dev->dev.parent = bus->bridge;  in of_create_pci_dev()
294 	dev->dev.bus = &pci_bus_type;  in of_create_pci_dev()
295 	dev->dev.of_node = of_node_get(node);  in of_create_pci_dev()
296 	dev->devfn = devfn;  in of_create_pci_dev()
297 	dev->multifunction = 0;		/* maybe a lie? */  in of_create_pci_dev()
301 	dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff);  in of_create_pci_dev()
302 	dev->device = of_getintprop_default(node, "device-id", 0xffff);  in of_create_pci_dev()
303 	dev->subsystem_vendor =  in of_create_pci_dev()
304 		of_getintprop_default(node, "subsystem-vendor-id", 0);  in of_create_pci_dev()
305 	dev->subsystem_device =  in of_create_pci_dev()
306 		of_getintprop_default(node, "subsystem-id", 0);  in of_create_pci_dev()
308 	dev->cfg_size = pci_cfg_space_size(dev);  in of_create_pci_dev()
317 	dev->class = class >> 8;  in of_create_pci_dev()
318 	dev->revision = class & 0xff;  in of_create_pci_dev()
320 	dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus),  in of_create_pci_dev()
321 		dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));  in of_create_pci_dev()
327 	if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)  in of_create_pci_dev()
330 	dev->current_state = PCI_UNKNOWN;	/* unknown power state */  in of_create_pci_dev()
331 	dev->error_state = pci_channel_io_normal;  in of_create_pci_dev()
332 	dev->dma_mask = 0xffffffff;  in of_create_pci_dev()
335 		/* a PCI-PCI bridge */  in of_create_pci_dev()
336 		dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;  in of_create_pci_dev()
337 		dev->rom_base_reg = PCI_ROM_ADDRESS1;  in of_create_pci_dev()
339 		dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;  in of_create_pci_dev()
341 		dev->hdr_type = PCI_HEADER_TYPE_NORMAL;  in of_create_pci_dev()
342 		dev->rom_base_reg = PCI_ROM_ADDRESS;  in of_create_pci_dev()
344 		dev->irq = sd->op->archdata.irqs[0];  in of_create_pci_dev()
345 		if (dev->irq == 0xffffffff)  in of_create_pci_dev()
346 			dev->irq = PCI_IRQ_NONE;  in of_create_pci_dev()
350 		 dev->vendor, dev->device, dev->hdr_type, dev->class);  in of_create_pci_dev()
352 	pci_parse_of_addrs(sd->op, node, dev);  in of_create_pci_dev()
395 	res = bus->resource[0];  in apb_fake_ranges()
396 	res->flags = IORESOURCE_IO;  in apb_fake_ranges()
398 	region.end = (last << 21) + ((1 << 21) - 1);  in apb_fake_ranges()
399 	pcibios_bus_to_resource(dev->bus, res, &region);  in apb_fake_ranges()
403 	res = bus->resource[1];  in apb_fake_ranges()
404 	res->flags = IORESOURCE_MEM;  in apb_fake_ranges()
406 	region.end = (last << 29) + ((1 << 29) - 1);  in apb_fake_ranges()
407 	pcibios_bus_to_resource(dev->bus, res, &region);  in apb_fake_ranges()
431 	/* parse bus-range property */  in of_scan_pci_bridge()
432 	busrange = of_get_property(node, "bus-range", &len);  in of_scan_pci_bridge()
434 		pci_info(dev, "Can't get bus-range for PCI-PCI bridge %pOF\n",  in of_scan_pci_bridge()
440 		pci_info(dev, "    Bridge bus range [%u --> %u]\n",  in of_scan_pci_bridge()
451 	bus = pci_add_new_bus(dev->bus, dev, busrange[0]);  in of_scan_pci_bridge()
458 	bus->primary = dev->bus->number;  in of_scan_pci_bridge()
460 	bus->bridge_ctl = 0;  in of_scan_pci_bridge()
467 	/* PCI #address-cells == 3 and #size-cells == 2 always */  in of_scan_pci_bridge()
468 	res = &dev->resource[PCI_BRIDGE_RESOURCES];  in of_scan_pci_bridge()
469 	for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {  in of_scan_pci_bridge()
470 		res->flags = 0;  in of_scan_pci_bridge()
471 		bus->resource[i] = res;  in of_scan_pci_bridge()
482 	for (; len >= 32; len -= 32, ranges += 8) {  in of_scan_pci_bridge()
496 		/* On PCI-Express systems, PCI bridges that have no devices downstream  in of_scan_pci_bridge()
497 		 * have a bogus size value where the first 32-bit cell is 0xffffffff.  in of_scan_pci_bridge()
507 			res = bus->resource[0];  in of_scan_pci_bridge()
508 			if (res->flags) {  in of_scan_pci_bridge()
514 			if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {  in of_scan_pci_bridge()
519 			res = bus->resource[i];  in of_scan_pci_bridge()
523 		res->flags = flags;  in of_scan_pci_bridge()
525 		region.end = region.start + size - 1;  in of_scan_pci_bridge()
531 		pcibios_bus_to_resource(dev->bus, res, &region);  in of_scan_pci_bridge()
534 	sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),  in of_scan_pci_bridge()
535 		bus->number);  in of_scan_pci_bridge()
537 		pci_info(dev, "    bus name: %s\n", bus->name);  in of_scan_pci_bridge()
553 			 node, bus->number);  in pci_of_scan_bus()
555 	prev_devfn = -1;  in pci_of_scan_bus()
579 			pci_info(dev, "dev header type: %x\n", dev->hdr_type);  in pci_of_scan_bus()
593 	dp = pdev->dev.of_node;  in show_pciobppath_attr()
606 	list_for_each_entry(dev, &bus->devices, bus_list) {  in pci_bus_register_of_sysfs()
614 		err = sysfs_create_file(&dev->dev.kobj, &dev_attr_obppath.attr);  in pci_bus_register_of_sysfs()
617 	list_for_each_entry(child_bus, &bus->children, node)  in pci_bus_register_of_sysfs()
626 	if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)  in pci_claim_legacy_resources()
633 	p->name = "Video RAM area";  in pci_claim_legacy_resources()
634 	p->flags = IORESOURCE_MEM | IORESOURCE_BUSY;  in pci_claim_legacy_resources()
638 	pcibios_bus_to_resource(dev->bus, p, &region);  in pci_claim_legacy_resources()
649 			 p, conflict->name, conflict);  in pci_claim_legacy_resources()
665 	list_for_each_entry(dev, &bus->devices, bus_list) {  in pci_claim_bus_resources()
669 			struct resource *r = &dev->resource[i];  in pci_claim_bus_resources()
671 			if (r->parent || !r->start || !r->flags)  in pci_claim_bus_resources()
684 	list_for_each_entry(child_bus, &bus->children, node)  in pci_claim_bus_resources()
692 	struct device_node *node = pbm->op->dev.of_node;  in pci_scan_one_pbm()
697 	pci_add_resource_offset(&resources, &pbm->io_space,  in pci_scan_one_pbm()
698 				pbm->io_offset);  in pci_scan_one_pbm()
699 	pci_add_resource_offset(&resources, &pbm->mem_space,  in pci_scan_one_pbm()
700 				pbm->mem_offset);  in pci_scan_one_pbm()
701 	if (pbm->mem64_space.flags)  in pci_scan_one_pbm()
702 		pci_add_resource_offset(&resources, &pbm->mem64_space,  in pci_scan_one_pbm()
703 					pbm->mem64_offset);  in pci_scan_one_pbm()
704 	pbm->busn.start = pbm->pci_first_busno;  in pci_scan_one_pbm()
705 	pbm->busn.end	= pbm->pci_last_busno;  in pci_scan_one_pbm()
706 	pbm->busn.flags	= IORESOURCE_BUS;  in pci_scan_one_pbm()
707 	pci_add_resource(&resources, &pbm->busn);  in pci_scan_one_pbm()
708 	bus = pci_create_root_bus(parent, pbm->pci_first_busno, pbm->pci_ops,  in pci_scan_one_pbm()
734 		struct resource *res = &dev->resource[i];  in pcibios_enable_device()
740 		if (res->flags & IORESOURCE_IO)  in pcibios_enable_device()
742 		if (res->flags & IORESOURCE_MEM)  in pcibios_enable_device()
747 		pci_info(dev, "enabling device (%04x -> %04x)\n", oldcmd, cmd);  in pcibios_enable_device()
753 /* Platform support for /proc/bus/pci/X/Y mmap()s. */
755 /* If the user uses a host-bridge as the PCI device, he may use
765 	struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;  in __pci_mmap_make_offset_bus()
769 		space_size = resource_size(&pbm->io_space);  in __pci_mmap_make_offset_bus()
771 		space_size = resource_size(&pbm->mem_space);  in __pci_mmap_make_offset_bus()
775 	user_offset = vma->vm_pgoff << PAGE_SHIFT;  in __pci_mmap_make_offset_bus()
776 	user_size = vma->vm_end - vma->vm_start;  in __pci_mmap_make_offset_bus()
780 		return -EINVAL;  in __pci_mmap_make_offset_bus()
783 		vma->vm_pgoff = (pbm->io_space.start +  in __pci_mmap_make_offset_bus()
786 		vma->vm_pgoff = (pbm->mem_space.start +  in __pci_mmap_make_offset_bus()
794  * corresponding to the 32-bit pci bus offset for DEV requested by the user.
797  * to mmap.  They read the 32-bit value from the config space base register,
810 	/* First compute the physical address in vma->vm_pgoff,  in __pci_mmap_make_offset()
821 	if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST)  in __pci_mmap_make_offset()
827 	user_paddr = vma->vm_pgoff << PAGE_SHIFT;  in __pci_mmap_make_offset()
828 	user_size = vma->vm_end - vma->vm_start;  in __pci_mmap_make_offset()
831 		struct resource *rp = &pdev->resource[i];  in __pci_mmap_make_offset()  local
835 		if (!rp->flags)  in __pci_mmap_make_offset()
844 			     (rp->flags & IORESOURCE_IO) == 0) ||  in __pci_mmap_make_offset()
846 			     (rp->flags & IORESOURCE_MEM) == 0))  in __pci_mmap_make_offset()
851 		 * PAGE_SIZE intentionally added instead of (PAGE_SIZE - 1),  in __pci_mmap_make_offset()
853 		 * after rp->end.  in __pci_mmap_make_offset()
855 		aligned_end = (rp->end + PAGE_SIZE) & PAGE_MASK;  in __pci_mmap_make_offset()
857 		if ((rp->start <= user_paddr) &&  in __pci_mmap_make_offset()
863 		return -EINVAL;  in __pci_mmap_make_offset()
881  * decisions on a per-device or per-bus basis.
897 	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);  in pci_mmap_page_range()
898 	ret = io_remap_pfn_range(vma, vma->vm_start,  in pci_mmap_page_range()
899 				 vma->vm_pgoff,  in pci_mmap_page_range()
900 				 vma->vm_end - vma->vm_start,  in pci_mmap_page_range()
901 				 vma->vm_page_prot);  in pci_mmap_page_range()
911 	struct pci_pbm_info *pbm = pbus->sysdata;  in pcibus_to_node()
913 	return pbm->numa_node;  in pcibus_to_node()
922 	struct pci_pbm_info *pbm = pbus->sysdata;  in pci_domain_nr()
926 		ret = -ENXIO;  in pci_domain_nr()
928 		ret = pbm->index;  in pci_domain_nr()
938 	struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;  in arch_setup_msi_irq()
941 	if (!pbm->setup_msi_irq)  in arch_setup_msi_irq()
942 		return -EINVAL;  in arch_setup_msi_irq()
944 	return pbm->setup_msi_irq(&irq, pdev, desc);  in arch_setup_msi_irq()
951 	struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;  in arch_teardown_msi_irq()
953 	if (pbm->teardown_msi_irq)  in arch_teardown_msi_irq()
954 		pbm->teardown_msi_irq(irq, pdev);  in arch_teardown_msi_irq()
958 /* ALI sound chips generate 31-bits of DMA, a special register
963 	struct iommu *iommu = dev->archdata.iommu;  in ali_sound_dma_hack()
970 	if (to_pci_dev(dev)->vendor != PCI_VENDOR_ID_AL ||  in ali_sound_dma_hack()
971 	    to_pci_dev(dev)->device != PCI_DEVICE_ID_AL_M5451 ||  in ali_sound_dma_hack()
980 	if (iommu->dma_addr_mask & 0x80000000)  in ali_sound_dma_hack()
990 			  const struct resource *rp, resource_size_t *start,  in pci_resource_to_user()  argument
1002 	pcibios_resource_to_bus(pdev->bus, &region, (struct resource *) rp);  in pci_resource_to_user()
1020 	if (dev->is_virtfn) {  in pcibios_add_device()
1023 		pdev = dev->physfn;  in pcibios_add_device()
1024 		psd = &pdev->dev.archdata;  in pcibios_add_device()
1025 		pci_init_dev_archdata(&dev->dev.archdata, psd->iommu,  in pcibios_add_device()
1026 				      psd->stc, psd->host_controller, NULL,  in pcibios_add_device()
1027 				      psd->numa_node);  in pcibios_add_device()
1049 	list_for_each_entry(pdev, &pbus->devices, bus_list) {  in pcie_bus_slot_names()
1055 		slot_num = of_get_property(pdev->dev.of_node,  in pcie_bus_slot_names()
1056 					   "physical-slot#", &len);  in pcie_bus_slot_names()
1069 	list_for_each_entry(bus, &pbus->children, node)  in pcie_bus_slot_names()
1083 	prop = of_get_property(node, "slot-names", &len);  in pci_bus_slot_names()
1087 	mask = prop->slot_mask;  in pci_bus_slot_names()
1088 	sp = prop->names;  in pci_bus_slot_names()
1126 		pdev = list_first_entry(&pbus->devices, struct pci_dev,  in of_pci_slot_init()
1133 			if (pbus->self) {  in of_pci_slot_init()
1135 				/* PCI->PCI bridge */  in of_pci_slot_init()
1136 				node = pbus->self->dev.of_node;  in of_pci_slot_init()
1139 				struct pci_pbm_info *pbm = pbus->sysdata;  in of_pci_slot_init()
1142 				node = pbm->op->dev.of_node;  in of_pci_slot_init()