2  *	Low-Level PCI Support for PC
4  *	(c) 1999--2000 Martin Mares <mj@ucw.cz>
8 #include <linux/pci.h>
9 #include <linux/pci-acpi.h>
33 int pcibios_last_bus = -1;
38 int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,  in raw_pci_read()  argument
41 	if (domain == 0 && reg < 256 && raw_pci_ops)  in raw_pci_read()
42 		return raw_pci_ops->read(domain, bus, devfn, reg, len, val);  in raw_pci_read()
44 		return raw_pci_ext_ops->read(domain, bus, devfn, reg, len, val);  in raw_pci_read()
45 	return -EINVAL;  in raw_pci_read()
48 int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,  in raw_pci_write()  argument
51 	if (domain == 0 && reg < 256 && raw_pci_ops)  in raw_pci_write()
52 		return raw_pci_ops->write(domain, bus, devfn, reg, len, val);  in raw_pci_write()
54 		return raw_pci_ext_ops->write(domain, bus, devfn, reg, len, val);  in raw_pci_write()
55 	return -EINVAL;  in raw_pci_write()
60 	return raw_pci_read(pci_domain_nr(bus), bus->number,  in pci_read()
66 	return raw_pci_write(pci_domain_nr(bus), bus->number,  in pci_write()
76  * This interrupt-safe spinlock protects all accesses to PCI configuration
84 	printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident);  in can_skip_ioresource_align()
90  * Systems where PCI IO resource ISA alignment can be skipped
127 	struct resource *rom_r = &dev->resource[PCI_ROM_RESOURCE];  in pcibios_fixup_device_resources()
138 			bar_r = &dev->resource[bar];  in pcibios_fixup_device_resources()
139 			if (bar_r->start == 0 && bar_r->end != 0) {  in pcibios_fixup_device_resources()
140 				bar_r->flags = 0;  in pcibios_fixup_device_resources()
141 				bar_r->end = 0;  in pcibios_fixup_device_resources()
147 		if (rom_r->parent)  in pcibios_fixup_device_resources()
149 		if (rom_r->start) {  in pcibios_fixup_device_resources()
153 		rom_r->start = rom_r->end = rom_r->flags = 0;  in pcibios_fixup_device_resources()
167 	list_for_each_entry(dev, &b->devices, bus_list)  in pcibios_fixup_bus()
190 		printk(KERN_INFO "PCI: %s detected, enabling pci=bfsort.\n", d->ident);  in set_bf_sort()
200 	if (dm->type != 0xB1)  in read_dmi_type_b1()
213  * Enable renumbering of PCI bus# ranges to reach all PCI busses (Cardbus)
219 	printk(KERN_INFO "%s detected: enabling PCI bus# renumbering"  in assign_all_busses()
220 			" (pci=assign-busses)\n", d->ident);  in assign_all_busses()
227 	printk(KERN_INFO "PCI: %s detected, enabling pci=pcie_scan_all\n",  in set_scan_all()
228 	       d->ident);  in set_scan_all()
236  * Laptops which need pci=assign-busses to see Cardbus cards
464 		printk(KERN_ERR "PCI: OOM, skipping PCI bus %02x\n", busnum);  in pcibios_scan_root()
467 	sd->node = x86_pci_root_bus_node(busnum);  in pcibios_scan_root()
469 	printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum);  in pcibios_scan_root()
484 	 * Set PCI cacheline size to that of the CPU if the CPU has reported it.  in pcibios_set_cache_line_size()
487 	 * as quite a few PCI devices do not support smaller values.  in pcibios_set_cache_line_size()
489 	if (c->x86_clflush_size > 0) {  in pcibios_set_cache_line_size()
490 		pci_dfl_cache_line_size = c->x86_clflush_size >> 2;  in pcibios_set_cache_line_size()
491 		printk(KERN_DEBUG "PCI: pci_cache_line_size set to %d bytes\n",  in pcibios_set_cache_line_size()
495 		printk(KERN_DEBUG "PCI: Unknown cacheline size. Setting to 32 bytes\n");  in pcibios_set_cache_line_size()
502 		printk(KERN_WARNING "PCI: System does not support PCI\n");  in pcibios_init()
587 	} else if (!strcmp(str, "assign-busses")) {  in pcibios_setup()
611 		if (noioapicreroute != -1)  in pcibios_setup()
615 		if (noioapicreroute != -1)  in pcibios_setup()
631 void add_dma_domain(struct dma_domain *domain)  in add_dma_domain()  argument
634 	list_add(&domain->node, &dma_domain_list);  in add_dma_domain()
639 void del_dma_domain(struct dma_domain *domain)  in del_dma_domain()  argument
642 	list_del(&domain->node);  in del_dma_domain()
649 	struct dma_domain *domain;  in set_dma_domain_ops()  local
652 	list_for_each_entry(domain, &dma_domain_list, node) {  in set_dma_domain_ops()
653 		if (pci_domain_nr(pdev->bus) == domain->domain_nr) {  in set_dma_domain_ops()
654 			pdev->dev.dma_ops = domain->dma_ops;  in set_dma_domain_ops()
666 	if (is_vmd(pdev->bus))  in set_dev_domain_options()
667 		pdev->hotplug_user_indicators = 1;  in set_dev_domain_options()
680 			return -ENOMEM;  in pcibios_add_device()
682 		if (data->type == SETUP_PCI) {  in pcibios_add_device()
685 			if ((pci_domain_nr(dev->bus) == rom->segment) &&  in pcibios_add_device()
686 			    (dev->bus->number == rom->bus) &&  in pcibios_add_device()
687 			    (PCI_SLOT(dev->devfn) == rom->device) &&  in pcibios_add_device()
688 			    (PCI_FUNC(dev->devfn) == rom->function) &&  in pcibios_add_device()
689 			    (dev->vendor == rom->vendor) &&  in pcibios_add_device()
690 			    (dev->device == rom->devid)) {  in pcibios_add_device()
691 				dev->rom = pa_data +  in pcibios_add_device()
693 				dev->romlen = rom->pcilen;  in pcibios_add_device()
696 		pa_data = data->next;  in pcibios_add_device()
725 	if (atomic_dec_return(&dev->enable_cnt) >= 0)  in pcibios_release_device()