1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (C) 1993 -- 1997 Drew Eckhardt, Frederic Potter,
6  *					David Mosberger-Tang
7  * Copyright (C) 1997 -- 2000 Martin Mares <mj@ucw.cz>
8  * Copyright (C) 2003 -- 2004 Greg Kroah-Hartman <greg@kroah.com>
20  * pci_for_each_dma_alias - Iterate over DMA aliases for a device
36 	 * The device may have an explicit alias requester ID for DMA where the  in pci_for_each_dma_alias()
46 	 * If the device is broken and uses an alias requester ID for  in pci_for_each_dma_alias()
49 	if (unlikely(pdev->dma_alias_mask)) {  in pci_for_each_dma_alias()
52 		for_each_set_bit(devfn, pdev->dma_alias_mask, MAX_NR_DEVFNS) {  in pci_for_each_dma_alias()
53 			ret = fn(pdev, PCI_DEVID(pdev->bus->number, devfn),  in pci_for_each_dma_alias()
60 	for (bus = pdev->bus; !pci_is_root_bus(bus); bus = bus->parent) {  in pci_for_each_dma_alias()
64 		if (!bus->self)  in pci_for_each_dma_alias()
67 		tmp = bus->self;  in pci_for_each_dma_alias()
70 		if (tmp->dev_flags & PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT)  in pci_for_each_dma_alias()
74 		 * PCIe-to-PCI/X bridges alias transactions from downstream  in pci_for_each_dma_alias()
76 		 * PCI/PCI-X Bridge Spec, rev 1.0, sec 2.3).  For all cases  in pci_for_each_dma_alias()
80 		 * when the secondary interface is PCI-X).  in pci_for_each_dma_alias()
90 					 PCI_DEVID(tmp->subordinate->number,  in pci_for_each_dma_alias()
102 			if (tmp->dev_flags & PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS)  in pci_for_each_dma_alias()
104 					 PCI_DEVID(tmp->subordinate->number,  in pci_for_each_dma_alias()
121 	if (bus->number == busnr)  in pci_do_find_bus()
124 	list_for_each_entry(tmp, &bus->children, node) {  in pci_do_find_bus()
133  * pci_find_bus - locate PCI bus from a given domain and bus number
158  * pci_find_next_bus - begin or continue searching for a PCI bus
172 	n = from ? from->node.next : pci_root_buses.next;  in pci_find_next_bus()
181  * pci_get_slot - locate PCI device for a given PCI slot
185  * in case of multi-function devices.
200 	list_for_each_entry(dev, &bus->devices, bus_list) {  in pci_get_slot()
201 		if (dev->devfn == devfn)  in pci_get_slot()
214  * pci_get_domain_bus_and_slot - locate PCI device for a given PCI domain (segment), bus, and slot
219  * multi-function devices.
234 		if (pci_domain_nr(dev->bus) == domain &&  in pci_get_domain_bus_and_slot()
235 		    (dev->bus->number == bus && dev->devfn == devfn))  in pci_get_domain_bus_and_slot()
245 	const struct pci_device_id *id = data;  in match_pci_dev_by_id()  local
247 	if (pci_match_one_device(id, pdev))  in match_pci_dev_by_id()
253  * pci_get_dev_by_id - begin or continue searching for a PCI device by id
254  * @id: pointer to struct pci_device_id to match for the device
258  * with a matching id a pointer to its device structure is returned, and the
268 static struct pci_dev *pci_get_dev_by_id(const struct pci_device_id *id,  in pci_get_dev_by_id()  argument
276 		dev_start = &from->dev;  in pci_get_dev_by_id()
277 	dev = bus_find_device(&pci_bus_type, dev_start, (void *)id,  in pci_get_dev_by_id()
286 …* pci_get_subsys - begin or continue searching for a PCI device by vendor/subvendor/device/subdevi…
287  * @vendor: PCI vendor id to match, or %PCI_ANY_ID to match all vendor ids
288  * @device: PCI device id to match, or %PCI_ANY_ID to match all device ids
289  * @ss_vendor: PCI subsystem vendor id to match, or %PCI_ANY_ID to match all vendor ids
290  * @ss_device: PCI subsystem device id to match, or %PCI_ANY_ID to match all device ids
294  * with a matching @vendor, @device, @ss_vendor and @ss_device, a pointer to its
301 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,  in pci_get_subsys()  argument
305 	struct pci_device_id id = {  in pci_get_subsys()  local
306 		.vendor = vendor,  in pci_get_subsys()
312 	return pci_get_dev_by_id(&id, from);  in pci_get_subsys()
317  * pci_get_device - begin or continue searching for a PCI device by vendor/device id
318  * @vendor: PCI vendor id to match, or %PCI_ANY_ID to match all vendor ids
319  * @device: PCI device id to match, or %PCI_ANY_ID to match all device ids
323  * found with a matching @vendor and @device, the reference count to the
330 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,  in pci_get_device()  argument
333 	return pci_get_subsys(vendor, device, PCI_ANY_ID, PCI_ANY_ID, from);  in pci_get_device()
338  * pci_get_class - begin or continue searching for a PCI device by class
353 	struct pci_device_id id = {  in pci_get_class()  local
354 		.vendor = PCI_ANY_ID,  in pci_get_class()
362 	return pci_get_dev_by_id(&id, from);  in pci_get_class()
367  * pci_get_base_class - searching for a PCI device by matching against the base class code only
384 	struct pci_device_id id = {  in pci_get_base_class()  local
385 		.vendor = PCI_ANY_ID,  in pci_get_base_class()
393 	return pci_get_dev_by_id(&id, from);  in pci_get_base_class()
398  * pci_dev_present - Returns 1 if device matching the device list is present, 0 if not.
412 	while (ids->vendor || ids->subvendor || ids->class_mask) {  in pci_dev_present()