2 * PCI Backend Common Data Structures & Function Declarations
4 * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
6 #ifndef __XEN_PCIBACK_H__
7 #define __XEN_PCIBACK_H__
10 #include <linux/interrupt.h>
11 #include <xen/xenbus.h>
12 #include <linux/list.h>
13 #include <linux/spinlock.h>
14 #include <linux/workqueue.h>
15 #include <asm/atomic.h>
16 #include <xen/interface/io/pciif.h>
18 struct pci_dev_entry {
19 struct list_head list;
23 #define _PDEVF_op_active (0)
24 #define PDEVF_op_active (1<<(_PDEVF_op_active))
25 #define _PCIB_op_pending (1)
26 #define PCIB_op_pending (1<<(_PCIB_op_pending))
28 struct pciback_device {
32 struct xenbus_device *xdev;
34 struct xenbus_watch be_watch;
39 struct vm_struct *sh_area;
40 struct xen_pci_sharedinfo *sh_info;
44 struct work_struct op_work;
47 struct pciback_dev_data {
48 struct list_head config_fields;
53 /* Get/Put PCI Devices that are hidden from the PCI Backend Domain */
54 struct pci_dev *pcistub_get_pci_dev_by_slot(struct pciback_device *pdev,
57 struct pci_dev *pcistub_get_pci_dev(struct pciback_device *pdev,
59 void pcistub_put_pci_dev(struct pci_dev *dev);
61 /* Ensure a device is turned off or reset */
62 void pciback_reset_device(struct pci_dev *pdev);
64 /* Access a virtual configuration space for a PCI device */
65 int pciback_config_init(void);
66 int pciback_config_init_dev(struct pci_dev *dev);
67 void pciback_config_free_dyn_fields(struct pci_dev *dev);
68 void pciback_config_reset_dev(struct pci_dev *dev);
69 void pciback_config_free_dev(struct pci_dev *dev);
70 int pciback_config_read(struct pci_dev *dev, int offset, int size,
72 int pciback_config_write(struct pci_dev *dev, int offset, int size, u32 value);
74 /* Handle requests for specific devices from the frontend */
75 typedef int (*publish_pci_dev_cb) (struct pciback_device *pdev,
76 unsigned int domain, unsigned int bus,
77 unsigned int devfn, unsigned int devid);
78 typedef int (*publish_pci_root_cb) (struct pciback_device * pdev,
79 unsigned int domain, unsigned int bus);
80 int pciback_add_pci_dev(struct pciback_device *pdev, struct pci_dev *dev,
81 int devid, publish_pci_dev_cb publish_cb);
82 void pciback_release_pci_dev(struct pciback_device *pdev, struct pci_dev *dev);
83 struct pci_dev *pciback_get_pci_dev(struct pciback_device *pdev,
84 unsigned int domain, unsigned int bus,
88 * Add for domain0 PCIE-AER handling. Get guest domain/bus/devfn in pciback
89 * before sending aer request to pcifront, so that guest could identify
90 * device, coopearte with pciback to finish aer recovery job if device driver
94 int pciback_get_pcifront_dev(struct pci_dev *pcidev, struct pciback_device *pdev,
95 unsigned int *domain, unsigned int *bus, unsigned int *devfn);
96 int pciback_init_devices(struct pciback_device *pdev);
97 int pciback_publish_pci_roots(struct pciback_device *pdev,
98 publish_pci_root_cb cb);
99 void pciback_release_devices(struct pciback_device *pdev);
101 /* Handles events from front-end */
102 irqreturn_t pciback_handle_event(int irq, void *dev_id);
103 void pciback_do_op(struct work_struct *work);
105 int pciback_xenbus_register(void);
106 void pciback_xenbus_unregister(void);
108 #ifdef CONFIG_PCI_MSI
109 int pciback_enable_msi(struct pciback_device *pdev,
110 struct pci_dev *dev, struct xen_pci_op *op);
112 int pciback_disable_msi(struct pciback_device *pdev,
113 struct pci_dev *dev, struct xen_pci_op *op);
116 int pciback_enable_msix(struct pciback_device *pdev,
117 struct pci_dev *dev, struct xen_pci_op *op);
119 int pciback_disable_msix(struct pciback_device *pdev,
120 struct pci_dev *dev, struct xen_pci_op *op);
122 extern int verbose_request;
124 void test_and_schedule_op(struct pciback_device *pdev);