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7#ifndef __XEN_PCIBACK_H__
8#define __XEN_PCIBACK_H__
9
10#include <linux/pci.h>
11#include <linux/interrupt.h>
12#include <xen/xenbus.h>
13#include <linux/list.h>
14#include <linux/spinlock.h>
15#include <linux/workqueue.h>
16#include <linux/atomic.h>
17#include <xen/interface/io/pciif.h>
18
19#define DRV_NAME "xen-pciback"
20
21struct pci_dev_entry {
22 struct list_head list;
23 struct pci_dev *dev;
24};
25
26#define _PDEVF_op_active (0)
27#define PDEVF_op_active (1<<(_PDEVF_op_active))
28#define _PCIB_op_pending (1)
29#define PCIB_op_pending (1<<(_PCIB_op_pending))
30
31struct xen_pcibk_device {
32 void *pci_dev_data;
33 struct mutex dev_lock;
34 struct xenbus_device *xdev;
35 struct xenbus_watch be_watch;
36 u8 be_watching;
37 int evtchn_irq;
38 struct xen_pci_sharedinfo *sh_info;
39 unsigned long flags;
40 struct work_struct op_work;
41 struct xen_pci_op op;
42};
43
44struct xen_pcibk_dev_data {
45 struct list_head config_fields;
46 struct pci_saved_state *pci_saved_state;
47 unsigned int permissive:1;
48 unsigned int allow_interrupt_control:1;
49 unsigned int warned_on_write:1;
50 unsigned int enable_intx:1;
51 unsigned int isr_on:1;
52 unsigned int ack_intr:1;
53 unsigned long handled;
54 unsigned int irq;
55 char irq_name[];
56};
57
58
59extern wait_queue_head_t xen_pcibk_aer_wait_queue;
60
61extern struct list_head xen_pcibk_quirks;
62
63
64struct pci_dev *pcistub_get_pci_dev_by_slot(struct xen_pcibk_device *pdev,
65 int domain, int bus,
66 int slot, int func);
67struct pci_dev *pcistub_get_pci_dev(struct xen_pcibk_device *pdev,
68 struct pci_dev *dev);
69void pcistub_put_pci_dev(struct pci_dev *dev);
70
71
72void xen_pcibk_reset_device(struct pci_dev *pdev);
73
74
75int xen_pcibk_config_init(void);
76int xen_pcibk_config_init_dev(struct pci_dev *dev);
77void xen_pcibk_config_free_dyn_fields(struct pci_dev *dev);
78void xen_pcibk_config_reset_dev(struct pci_dev *dev);
79void xen_pcibk_config_free_dev(struct pci_dev *dev);
80int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
81 u32 *ret_val);
82int xen_pcibk_config_write(struct pci_dev *dev, int offset, int size,
83 u32 value);
84
85
86typedef int (*publish_pci_dev_cb) (struct xen_pcibk_device *pdev,
87 unsigned int domain, unsigned int bus,
88 unsigned int devfn, unsigned int devid);
89typedef int (*publish_pci_root_cb) (struct xen_pcibk_device *pdev,
90 unsigned int domain, unsigned int bus);
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94
95
96struct xen_pcibk_backend {
97 const char *name;
98 int (*init)(struct xen_pcibk_device *pdev);
99 void (*free)(struct xen_pcibk_device *pdev);
100 int (*find)(struct pci_dev *pcidev, struct xen_pcibk_device *pdev,
101 unsigned int *domain, unsigned int *bus,
102 unsigned int *devfn);
103 int (*publish)(struct xen_pcibk_device *pdev, publish_pci_root_cb cb);
104 void (*release)(struct xen_pcibk_device *pdev, struct pci_dev *dev,
105 bool lock);
106 int (*add)(struct xen_pcibk_device *pdev, struct pci_dev *dev,
107 int devid, publish_pci_dev_cb publish_cb);
108 struct pci_dev *(*get)(struct xen_pcibk_device *pdev,
109 unsigned int domain, unsigned int bus,
110 unsigned int devfn);
111};
112
113extern const struct xen_pcibk_backend xen_pcibk_vpci_backend;
114extern const struct xen_pcibk_backend xen_pcibk_passthrough_backend;
115extern const struct xen_pcibk_backend *xen_pcibk_backend;
116
117static inline int xen_pcibk_add_pci_dev(struct xen_pcibk_device *pdev,
118 struct pci_dev *dev,
119 int devid,
120 publish_pci_dev_cb publish_cb)
121{
122 if (xen_pcibk_backend && xen_pcibk_backend->add)
123 return xen_pcibk_backend->add(pdev, dev, devid, publish_cb);
124 return -1;
125}
126
127static inline void xen_pcibk_release_pci_dev(struct xen_pcibk_device *pdev,
128 struct pci_dev *dev, bool lock)
129{
130 if (xen_pcibk_backend && xen_pcibk_backend->release)
131 return xen_pcibk_backend->release(pdev, dev, lock);
132}
133
134static inline struct pci_dev *
135xen_pcibk_get_pci_dev(struct xen_pcibk_device *pdev, unsigned int domain,
136 unsigned int bus, unsigned int devfn)
137{
138 if (xen_pcibk_backend && xen_pcibk_backend->get)
139 return xen_pcibk_backend->get(pdev, domain, bus, devfn);
140 return NULL;
141}
142
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148
149static inline int xen_pcibk_get_pcifront_dev(struct pci_dev *pcidev,
150 struct xen_pcibk_device *pdev,
151 unsigned int *domain,
152 unsigned int *bus,
153 unsigned int *devfn)
154{
155 if (xen_pcibk_backend && xen_pcibk_backend->find)
156 return xen_pcibk_backend->find(pcidev, pdev, domain, bus,
157 devfn);
158 return -1;
159}
160
161static inline int xen_pcibk_init_devices(struct xen_pcibk_device *pdev)
162{
163 if (xen_pcibk_backend && xen_pcibk_backend->init)
164 return xen_pcibk_backend->init(pdev);
165 return -1;
166}
167
168static inline int xen_pcibk_publish_pci_roots(struct xen_pcibk_device *pdev,
169 publish_pci_root_cb cb)
170{
171 if (xen_pcibk_backend && xen_pcibk_backend->publish)
172 return xen_pcibk_backend->publish(pdev, cb);
173 return -1;
174}
175
176static inline void xen_pcibk_release_devices(struct xen_pcibk_device *pdev)
177{
178 if (xen_pcibk_backend && xen_pcibk_backend->free)
179 return xen_pcibk_backend->free(pdev);
180}
181
182
183irqreturn_t xen_pcibk_handle_event(int irq, void *dev_id);
184void xen_pcibk_do_op(struct work_struct *data);
185
186int xen_pcibk_xenbus_register(void);
187void xen_pcibk_xenbus_unregister(void);
188
189void xen_pcibk_test_and_schedule_op(struct xen_pcibk_device *pdev);
190#endif
191
192
193void xen_pcibk_irq_handler(struct pci_dev *dev, int reset);
194