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"
54 	unsigned int ack_intr:1; /* .. and ACK-ing */
56 	unsigned int irq; /* Saved in case device transitions to MSI/MSI-X */
57 	char irq_name[0]; /* xen-pcibk[000:04:00.0] */
65 /* Get/Put PCI Devices that are hidden from the PCI Backend Domain */
67 					    int domain, int bus,
76 /* Access a virtual configuration space for a PCI device */
89 				   unsigned int domain, unsigned int bus,
92 				    unsigned int domain, unsigned int bus);
95  *  vpci - BDFs start at 00
96  *  passthrough - BDFs are exactly like in the host.
103 		    unsigned int *domain, unsigned int *bus,
111 			       unsigned int domain, unsigned int bus,
124 	if (xen_pcibk_backend && xen_pcibk_backend->add)  in xen_pcibk_add_pci_dev()
125 		return xen_pcibk_backend->add(pdev, dev, devid, publish_cb);  in xen_pcibk_add_pci_dev()
126 	return -1;  in xen_pcibk_add_pci_dev()
132 	if (xen_pcibk_backend && xen_pcibk_backend->release)  in xen_pcibk_release_pci_dev()
133 		return xen_pcibk_backend->release(pdev, dev, lock);  in xen_pcibk_release_pci_dev()
137 xen_pcibk_get_pci_dev(struct xen_pcibk_device *pdev, unsigned int domain,  in xen_pcibk_get_pci_dev()  argument
140 	if (xen_pcibk_backend && xen_pcibk_backend->get)  in xen_pcibk_get_pci_dev()
141 		return xen_pcibk_backend->get(pdev, domain, bus, devfn);  in xen_pcibk_get_pci_dev()
146 * Add for domain0 PCIE-AER handling. Get guest domain/bus/devfn in xen_pcibk
153 					     unsigned int *domain,  in xen_pcibk_get_pcifront_dev()  argument
157 	if (xen_pcibk_backend && xen_pcibk_backend->find)  in xen_pcibk_get_pcifront_dev()
158 		return xen_pcibk_backend->find(pcidev, pdev, domain, bus,  in xen_pcibk_get_pcifront_dev()
160 	return -1;  in xen_pcibk_get_pcifront_dev()
165 	if (xen_pcibk_backend && xen_pcibk_backend->init)  in xen_pcibk_init_devices()
166 		return xen_pcibk_backend->init(pdev);  in xen_pcibk_init_devices()
167 	return -1;  in xen_pcibk_init_devices()
173 	if (xen_pcibk_backend && xen_pcibk_backend->publish)  in xen_pcibk_publish_pci_roots()
174 		return xen_pcibk_backend->publish(pdev, cb);  in xen_pcibk_publish_pci_roots()
175 	return -1;  in xen_pcibk_publish_pci_roots()
180 	if (xen_pcibk_backend && xen_pcibk_backend->free)  in xen_pcibk_release_devices()
181 		return xen_pcibk_backend->free(pdev);  in xen_pcibk_release_devices()
184 /* Handles events from front-end */
191 	if (test_and_clear_bit(_EOI_pending, &pdev->flags))  in xen_pcibk_lateeoi()
192 		xen_irq_lateeoi(pdev->evtchn_irq, eoi_flag);  in xen_pcibk_lateeoi()
201 /* Handles shared IRQs that can to device domain and control domain. */