diff options
Diffstat (limited to 'drivers/xen/xen-pciback/slot.c')
| -rw-r--r-- | drivers/xen/xen-pciback/slot.c | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/drivers/xen/xen-pciback/slot.c b/drivers/xen/xen-pciback/slot.c deleted file mode 100644 index efb922d6f78e..000000000000 --- a/drivers/xen/xen-pciback/slot.c +++ /dev/null @@ -1,191 +0,0 @@ -/* - * PCI Backend - Provides a Virtual PCI bus (with real devices) - * to the frontend - * - * Author: Ryan Wilson <hap9@epoch.ncsc.mil> (vpci.c) - * Author: Tristan Gingold <tristan.gingold@bull.net>, from vpci.c - */ - -#include <linux/list.h> -#include <linux/slab.h> -#include <linux/pci.h> -#include <linux/spinlock.h> -#include "pciback.h" - -/* There are at most 32 slots in a pci bus. */ -#define PCI_SLOT_MAX 32 - -#define PCI_BUS_NBR 2 - -struct slot_dev_data { - /* Access to dev_list must be protected by lock */ - struct pci_dev *slots[PCI_BUS_NBR][PCI_SLOT_MAX]; - spinlock_t lock; -}; - -struct pci_dev *pciback_get_pci_dev(struct pciback_device *pdev, - unsigned int domain, unsigned int bus, - unsigned int devfn) -{ - struct pci_dev *dev = NULL; - struct slot_dev_data *slot_dev = pdev->pci_dev_data; - unsigned long flags; - - if (domain != 0 || PCI_FUNC(devfn) != 0) - return NULL; - - if (PCI_SLOT(devfn) >= PCI_SLOT_MAX || bus >= PCI_BUS_NBR) - return NULL; - - spin_lock_irqsave(&slot_dev->lock, flags); - dev = slot_dev->slots[bus][PCI_SLOT(devfn)]; - spin_unlock_irqrestore(&slot_dev->lock, flags); - - return dev; -} - -int pciback_add_pci_dev(struct pciback_device *pdev, struct pci_dev *dev, - int devid, publish_pci_dev_cb publish_cb) -{ - int err = 0, slot, bus; - struct slot_dev_data *slot_dev = pdev->pci_dev_data; - unsigned long flags; - - if ((dev->class >> 24) == PCI_BASE_CLASS_BRIDGE) { - err = -EFAULT; - xenbus_dev_fatal(pdev->xdev, err, - "Can't export bridges on the virtual PCI bus"); - goto out; - } - - spin_lock_irqsave(&slot_dev->lock, flags); - - /* Assign to a new slot on the virtual PCI bus */ - for (bus = 0; bus < PCI_BUS_NBR; bus++) - for (slot = 0; slot < PCI_SLOT_MAX; slot++) { - if (slot_dev->slots[bus][slot] == NULL) { - printk(KERN_INFO - "pciback: slot: %s: assign to virtual " - "slot %d, bus %d\n", - pci_name(dev), slot, bus); - slot_dev->slots[bus][slot] = dev; - goto unlock; - } - } - - err = -ENOMEM; - xenbus_dev_fatal(pdev->xdev, err, - "No more space on root virtual PCI bus"); - -unlock: - spin_unlock_irqrestore(&slot_dev->lock, flags); - - /* Publish this device. */ - if (!err) - err = publish_cb(pdev, 0, 0, PCI_DEVFN(slot, 0), devid); - -out: - return err; -} - -void pciback_release_pci_dev(struct pciback_device *pdev, struct pci_dev *dev) -{ - int slot, bus; - struct slot_dev_data *slot_dev = pdev->pci_dev_data; - struct pci_dev *found_dev = NULL; - unsigned long flags; - - spin_lock_irqsave(&slot_dev->lock, flags); - - for (bus = 0; bus < PCI_BUS_NBR; bus++) - for (slot = 0; slot < PCI_SLOT_MAX; slot++) { - if (slot_dev->slots[bus][slot] == dev) { - slot_dev->slots[bus][slot] = NULL; - found_dev = dev; - goto out; - } - } - -out: - spin_unlock_irqrestore(&slot_dev->lock, flags); - - if (found_dev) - pcistub_put_pci_dev(found_dev); -} - -int pciback_init_devices(struct pciback_device *pdev) -{ - int slot, bus; - struct slot_dev_data *slot_dev; - - slot_dev = kmalloc(sizeof(*slot_dev), GFP_KERNEL); - if (!slot_dev) - return -ENOMEM; - - spin_lock_init(&slot_dev->lock); - - for (bus = 0; bus < PCI_BUS_NBR; bus++) - for (slot = 0; slot < PCI_SLOT_MAX; slot++) - slot_dev->slots[bus][slot] = NULL; - - pdev->pci_dev_data = slot_dev; - - return 0; -} - -int pciback_publish_pci_roots(struct pciback_device *pdev, - publish_pci_root_cb publish_cb) -{ - /* The Virtual PCI bus has only one root */ - return publish_cb(pdev, 0, 0); -} - -void pciback_release_devices(struct pciback_device *pdev) -{ - int slot, bus; - struct slot_dev_data *slot_dev = pdev->pci_dev_data; - struct pci_dev *dev; - - for (bus = 0; bus < PCI_BUS_NBR; bus++) - for (slot = 0; slot < PCI_SLOT_MAX; slot++) { - dev = slot_dev->slots[bus][slot]; - if (dev != NULL) - pcistub_put_pci_dev(dev); - } - - kfree(slot_dev); - pdev->pci_dev_data = NULL; -} - -int pciback_get_pcifront_dev(struct pci_dev *pcidev, - struct pciback_device *pdev, - unsigned int *domain, unsigned int *bus, - unsigned int *devfn) -{ - int slot, busnr; - struct slot_dev_data *slot_dev = pdev->pci_dev_data; - struct pci_dev *dev; - int found = 0; - unsigned long flags; - - spin_lock_irqsave(&slot_dev->lock, flags); - - for (busnr = 0; busnr < PCI_BUS_NBR; bus++) - for (slot = 0; slot < PCI_SLOT_MAX; slot++) { - dev = slot_dev->slots[busnr][slot]; - if (dev && dev->bus->number == pcidev->bus->number - && dev->devfn == pcidev->devfn - && pci_domain_nr(dev->bus) == - pci_domain_nr(pcidev->bus)) { - found = 1; - *domain = 0; - *bus = busnr; - *devfn = PCI_DEVFN(slot, 0); - goto out; - } - } -out: - spin_unlock_irqrestore(&slot_dev->lock, flags); - return found; - -} |