^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * PCI Backend - Provides a Virtual PCI bus (with real devices)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * to the frontend
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define dev_fmt pr_fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "pciback.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define PCI_SLOT_MAX 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct vpci_dev_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /* Access to dev_list must be protected by lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct list_head dev_list[PCI_SLOT_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct mutex lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static inline struct list_head *list_first(struct list_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) return head->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static struct pci_dev *__xen_pcibk_get_pci_dev(struct xen_pcibk_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) unsigned int domain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) unsigned int bus,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) unsigned int devfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct pci_dev_entry *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct pci_dev *dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) if (domain != 0 || bus != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (PCI_SLOT(devfn) < PCI_SLOT_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) mutex_lock(&vpci_dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) list_for_each_entry(entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) &vpci_dev->dev_list[PCI_SLOT(devfn)],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (PCI_FUNC(entry->dev->devfn) == PCI_FUNC(devfn)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) dev = entry->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) mutex_unlock(&vpci_dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static inline int match_slot(struct pci_dev *l, struct pci_dev *r)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (pci_domain_nr(l->bus) == pci_domain_nr(r->bus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) && l->bus == r->bus && PCI_SLOT(l->devfn) == PCI_SLOT(r->devfn))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static int __xen_pcibk_add_pci_dev(struct xen_pcibk_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct pci_dev *dev, int devid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) publish_pci_dev_cb publish_cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) int err = 0, slot, func = PCI_FUNC(dev->devfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct pci_dev_entry *t, *dev_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if ((dev->class >> 24) == PCI_BASE_CLASS_BRIDGE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) xenbus_dev_fatal(pdev->xdev, err,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) "Can't export bridges on the virtual PCI bus");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) dev_entry = kmalloc(sizeof(*dev_entry), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (!dev_entry) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) xenbus_dev_fatal(pdev->xdev, err,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) "Error adding entry to virtual PCI bus");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) dev_entry->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) mutex_lock(&vpci_dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * Keep multi-function devices together on the virtual PCI bus, except
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * that we want to keep virtual functions at func 0 on their own. They
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * aren't multi-function devices and hence their presence at func 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * may cause guests to not scan the other functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (!dev->is_virtfn || func) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (list_empty(&vpci_dev->dev_list[slot]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) t = list_entry(list_first(&vpci_dev->dev_list[slot]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) struct pci_dev_entry, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (t->dev->is_virtfn && !PCI_FUNC(t->dev->devfn))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (match_slot(dev, t->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) dev_info(&dev->dev, "vpci: assign to virtual slot %d func %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) slot, func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) list_add_tail(&dev_entry->list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) &vpci_dev->dev_list[slot]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /* Assign to a new slot on the virtual PCI bus */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (list_empty(&vpci_dev->dev_list[slot])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) dev_info(&dev->dev, "vpci: assign to virtual slot %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) slot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) list_add_tail(&dev_entry->list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) &vpci_dev->dev_list[slot]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) xenbus_dev_fatal(pdev->xdev, err,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) "No more space on root virtual PCI bus");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) mutex_unlock(&vpci_dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) /* Publish this device. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) err = publish_cb(pdev, 0, 0, PCI_DEVFN(slot, func), devid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) kfree(dev_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static void __xen_pcibk_release_pci_dev(struct xen_pcibk_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) struct pci_dev *dev, bool lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) int slot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) struct pci_dev *found_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) mutex_lock(&vpci_dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct pci_dev_entry *e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) list_for_each_entry(e, &vpci_dev->dev_list[slot], list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (e->dev == dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) list_del(&e->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) found_dev = e->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) kfree(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) mutex_unlock(&vpci_dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (found_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if (lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) device_lock(&found_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) pcistub_put_pci_dev(found_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) device_unlock(&found_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static int __xen_pcibk_init_devices(struct xen_pcibk_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) int slot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) struct vpci_dev_data *vpci_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) vpci_dev = kmalloc(sizeof(*vpci_dev), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) if (!vpci_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) mutex_init(&vpci_dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) for (slot = 0; slot < PCI_SLOT_MAX; slot++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) INIT_LIST_HEAD(&vpci_dev->dev_list[slot]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) pdev->pci_dev_data = vpci_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static int __xen_pcibk_publish_pci_roots(struct xen_pcibk_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) publish_pci_root_cb publish_cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) /* The Virtual PCI bus has only one root */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) return publish_cb(pdev, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static void __xen_pcibk_release_devices(struct xen_pcibk_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) int slot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) struct pci_dev_entry *e, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) list_for_each_entry_safe(e, tmp, &vpci_dev->dev_list[slot],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) struct pci_dev *dev = e->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) list_del(&e->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) device_lock(&dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) pcistub_put_pci_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) device_unlock(&dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) kfree(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) kfree(vpci_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) pdev->pci_dev_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) static int __xen_pcibk_get_pcifront_dev(struct pci_dev *pcidev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) struct xen_pcibk_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) unsigned int *domain, unsigned int *bus,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) unsigned int *devfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) struct pci_dev_entry *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) struct pci_dev *dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) int found = 0, slot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) mutex_lock(&vpci_dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) list_for_each_entry(entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) &vpci_dev->dev_list[slot],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) dev = entry->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) if (dev && dev->bus->number == pcidev->bus->number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) && pci_domain_nr(dev->bus) ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) pci_domain_nr(pcidev->bus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) && dev->devfn == pcidev->devfn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) found = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) *domain = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) *bus = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) *devfn = PCI_DEVFN(slot,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) PCI_FUNC(pcidev->devfn));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) mutex_unlock(&vpci_dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) return found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) const struct xen_pcibk_backend xen_pcibk_vpci_backend = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) .name = "vpci",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) .init = __xen_pcibk_init_devices,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) .free = __xen_pcibk_release_devices,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) .find = __xen_pcibk_get_pcifront_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) .publish = __xen_pcibk_publish_pci_roots,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) .release = __xen_pcibk_release_pci_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) .add = __xen_pcibk_add_pci_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) .get = __xen_pcibk_get_pci_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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