1 /* SPDX-License-Identifier: GPL-2.0 */
3  * PCI Backend Common Data Structures & Function Declarations
10 #include <linux/pci.h>
20 #define DRV_NAME	"xen-pciback"
55 	unsigned int ack_intr:1; /* .. and ACK-ing */
57 	unsigned int irq; /* Saved in case device transitions to MSI/MSI-X */
58 	char irq_name[]; /* xen-pcibk[000:04:00.0] */
66 /* Get/Put PCI Devices that are hidden from the PCI Backend Domain */
68 					    int domain, int bus,
77 /* Access a virtual configuration space for a PCI device */
90 				   unsigned int domain, unsigned int bus,
93 				    unsigned int domain, unsigned int bus);
96  *  vpci - BDFs start at 00
97  *  passthrough - BDFs are exactly like in the host.
104 		    unsigned int *domain, unsigned int *bus,
112 			       unsigned int domain, unsigned int bus,
125 	if (xen_pcibk_backend && xen_pcibk_backend->add)  in xen_pcibk_add_pci_dev()
126 		return xen_pcibk_backend->add(pdev, dev, devid, publish_cb);  in xen_pcibk_add_pci_dev()
127 	return -1;  in xen_pcibk_add_pci_dev()
133 	if (xen_pcibk_backend && xen_pcibk_backend->release)  in xen_pcibk_release_pci_dev()
134 		return xen_pcibk_backend->release(pdev, dev, lock);  in xen_pcibk_release_pci_dev()
138 xen_pcibk_get_pci_dev(struct xen_pcibk_device *pdev, unsigned int domain,  in xen_pcibk_get_pci_dev()  argument
141 	if (xen_pcibk_backend && xen_pcibk_backend->get)  in xen_pcibk_get_pci_dev()
142 		return xen_pcibk_backend->get(pdev, domain, bus, devfn);  in xen_pcibk_get_pci_dev()
147 * Add for domain0 PCIE-AER handling. Get guest domain/bus/devfn in xen_pcibk
154 					     unsigned int *domain,  in xen_pcibk_get_pcifront_dev()  argument
158 	if (xen_pcibk_backend && xen_pcibk_backend->find)  in xen_pcibk_get_pcifront_dev()
159 		return xen_pcibk_backend->find(pcidev, pdev, domain, bus,  in xen_pcibk_get_pcifront_dev()
161 	return -1;  in xen_pcibk_get_pcifront_dev()
166 	if (xen_pcibk_backend && xen_pcibk_backend->init)  in xen_pcibk_init_devices()
167 		return xen_pcibk_backend->init(pdev);  in xen_pcibk_init_devices()
168 	return -1;  in xen_pcibk_init_devices()
174 	if (xen_pcibk_backend && xen_pcibk_backend->publish)  in xen_pcibk_publish_pci_roots()
175 		return xen_pcibk_backend->publish(pdev, cb);  in xen_pcibk_publish_pci_roots()
176 	return -1;  in xen_pcibk_publish_pci_roots()
181 	if (xen_pcibk_backend && xen_pcibk_backend->free)  in xen_pcibk_release_devices()
182 		return xen_pcibk_backend->free(pdev);  in xen_pcibk_release_devices()
185 /* Handles events from front-end */
192 	if (test_and_clear_bit(_EOI_pending, &pdev->flags))  in xen_pcibk_lateeoi()
193 		xen_irq_lateeoi(pdev->evtchn_irq, eoi_flag);  in xen_pcibk_lateeoi()
200 /* Handles shared IRQs that can to device domain and control domain. */