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- /*
- * PCI Backend Common Data Structures & Function Declarations
- *
- * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
- */
- #ifndef __XEN_PCIBACK_H__
- #define __XEN_PCIBACK_H__
- #include <linux/pci.h>
- #include <linux/interrupt.h>
- #include <xen/xenbus.h>
- #include <linux/list.h>
- #include <linux/spinlock.h>
- #include <linux/workqueue.h>
- #include <linux/atomic.h>
- #include <xen/interface/io/pciif.h>
- struct pci_dev_entry {
- struct list_head list;
- struct pci_dev *dev;
- };
- #define _PDEVF_op_active (0)
- #define PDEVF_op_active (1<<(_PDEVF_op_active))
- #define _PCIB_op_pending (1)
- #define PCIB_op_pending (1<<(_PCIB_op_pending))
- struct pciback_device {
- void *pci_dev_data;
- spinlock_t dev_lock;
- struct xenbus_device *xdev;
- struct xenbus_watch be_watch;
- u8 be_watching;
- int evtchn_irq;
- struct xen_pci_sharedinfo *sh_info;
- unsigned long flags;
- struct work_struct op_work;
- };
- struct pciback_dev_data {
- struct list_head config_fields;
- unsigned int permissive:1;
- unsigned int warned_on_write:1;
- unsigned int enable_intx:1;
- unsigned int isr_on:1; /* Whether the IRQ handler is installed. */
- unsigned int ack_intr:1; /* .. and ACK-ing */
- unsigned long handled;
- unsigned int irq; /* Saved in case device transitions to MSI/MSI-X */
- char irq_name[0]; /* pciback[000:04:00.0] */
- };
- /* Used by XenBus and pciback_ops.c */
- extern wait_queue_head_t aer_wait_queue;
- extern struct workqueue_struct *pciback_wq;
- /* Used by pcistub.c and conf_space_quirks.c */
- extern struct list_head pciback_quirks;
- /* Get/Put PCI Devices that are hidden from the PCI Backend Domain */
- struct pci_dev *pcistub_get_pci_dev_by_slot(struct pciback_device *pdev,
- int domain, int bus,
- int slot, int func);
- struct pci_dev *pcistub_get_pci_dev(struct pciback_device *pdev,
- struct pci_dev *dev);
- void pcistub_put_pci_dev(struct pci_dev *dev);
- /* Ensure a device is turned off or reset */
- void pciback_reset_device(struct pci_dev *pdev);
- /* Access a virtual configuration space for a PCI device */
- int pciback_config_init(void);
- int pciback_config_init_dev(struct pci_dev *dev);
- void pciback_config_free_dyn_fields(struct pci_dev *dev);
- void pciback_config_reset_dev(struct pci_dev *dev);
- void pciback_config_free_dev(struct pci_dev *dev);
- int pciback_config_read(struct pci_dev *dev, int offset, int size,
- u32 *ret_val);
- int pciback_config_write(struct pci_dev *dev, int offset, int size, u32 value);
- /* Handle requests for specific devices from the frontend */
- typedef int (*publish_pci_dev_cb) (struct pciback_device *pdev,
- unsigned int domain, unsigned int bus,
- unsigned int devfn, unsigned int devid);
- typedef int (*publish_pci_root_cb) (struct pciback_device *pdev,
- unsigned int domain, unsigned int bus);
- int pciback_add_pci_dev(struct pciback_device *pdev, struct pci_dev *dev,
- int devid, publish_pci_dev_cb publish_cb);
- void pciback_release_pci_dev(struct pciback_device *pdev, struct pci_dev *dev);
- struct pci_dev *pciback_get_pci_dev(struct pciback_device *pdev,
- unsigned int domain, unsigned int bus,
- unsigned int devfn);
- /**
- * Add for domain0 PCIE-AER handling. Get guest domain/bus/devfn in pciback
- * before sending aer request to pcifront, so that guest could identify
- * device, coopearte with pciback to finish aer recovery job if device driver
- * has the capability
- */
- int pciback_get_pcifront_dev(struct pci_dev *pcidev,
- struct pciback_device *pdev,
- unsigned int *domain, unsigned int *bus,
- unsigned int *devfn);
- int pciback_init_devices(struct pciback_device *pdev);
- int pciback_publish_pci_roots(struct pciback_device *pdev,
- publish_pci_root_cb cb);
- void pciback_release_devices(struct pciback_device *pdev);
- /* Handles events from front-end */
- irqreturn_t pciback_handle_event(int irq, void *dev_id);
- void pciback_do_op(struct work_struct *data);
- int pciback_xenbus_register(void);
- void pciback_xenbus_unregister(void);
- #ifdef CONFIG_PCI_MSI
- int pciback_enable_msi(struct pciback_device *pdev,
- struct pci_dev *dev, struct xen_pci_op *op);
- int pciback_disable_msi(struct pciback_device *pdev,
- struct pci_dev *dev, struct xen_pci_op *op);
- int pciback_enable_msix(struct pciback_device *pdev,
- struct pci_dev *dev, struct xen_pci_op *op);
- int pciback_disable_msix(struct pciback_device *pdev,
- struct pci_dev *dev, struct xen_pci_op *op);
- #endif
- extern int verbose_request;
- void test_and_schedule_op(struct pciback_device *pdev);
- #endif
- /* Handles shared IRQs that can to device domain and control domain. */
- void pciback_irq_handler(struct pci_dev *dev, int reset);
- irqreturn_t pciback_guest_interrupt(int irq, void *dev_id);
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