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192.168.1.100 / R306 / 824eb0c6ade808c4501e62fbcf0025f4e694cd11 / . / ap / os / linux / linux-3.4.x / drivers / xen / xen-pciback / pciback.h
blob: a7def010eba3116ac73375f7704c06165c0e0699 [file] [log] [blame]
yuezonghe824eb0c2024-06-27 02:32:26 -0700[diff] [blame^]1/*
2 * PCI Backend Common Data Structures & Function Declarations
3 *
4 * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
5 */
6#ifndef __XEN_PCIBACK_H__
7#define __XEN_PCIBACK_H__
8
9#include <linux/pci.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 <linux/atomic.h>
16#include <xen/interface/io/pciif.h>
17
18#define DRV_NAME "xen-pciback"
19
20struct pci_dev_entry {
21 struct list_head list;
22 struct pci_dev *dev;
23};
24
25#define _PDEVF_op_active (0)
26#define PDEVF_op_active (1<<(_PDEVF_op_active))
27#define _PCIB_op_pending (1)
28#define PCIB_op_pending (1<<(_PCIB_op_pending))
29
30struct xen_pcibk_device {
31 void *pci_dev_data;
32 struct mutex dev_lock;
33 struct xenbus_device *xdev;
34 struct xenbus_watch be_watch;
35 u8 be_watching;
36 int evtchn_irq;
37 struct xen_pci_sharedinfo *sh_info;
38 unsigned long flags;
39 struct work_struct op_work;
40};
41
42struct xen_pcibk_dev_data {
43 struct list_head config_fields;
44 struct pci_saved_state *pci_saved_state;
45 unsigned int permissive:1;
46 unsigned int warned_on_write:1;
47 unsigned int enable_intx:1;
48 unsigned int isr_on:1; /* Whether the IRQ handler is installed. */
49 unsigned int ack_intr:1; /* .. and ACK-ing */
50 unsigned long handled;
51 unsigned int irq; /* Saved in case device transitions to MSI/MSI-X */
52 char irq_name[0]; /* xen-pcibk[000:04:00.0] */
53};
54
55/* Used by XenBus and xen_pcibk_ops.c */
56extern wait_queue_head_t xen_pcibk_aer_wait_queue;
57extern struct workqueue_struct *xen_pcibk_wq;
58/* Used by pcistub.c and conf_space_quirks.c */
59extern struct list_head xen_pcibk_quirks;
60
61/* Get/Put PCI Devices that are hidden from the PCI Backend Domain */
62struct pci_dev *pcistub_get_pci_dev_by_slot(struct xen_pcibk_device *pdev,
63 int domain, int bus,
64 int slot, int func);
65struct pci_dev *pcistub_get_pci_dev(struct xen_pcibk_device *pdev,
66 struct pci_dev *dev);
67void pcistub_put_pci_dev(struct pci_dev *dev);
68
69/* Ensure a device is turned off or reset */
70void xen_pcibk_reset_device(struct pci_dev *pdev);
71
72/* Access a virtual configuration space for a PCI device */
73int xen_pcibk_config_init(void);
74int xen_pcibk_config_init_dev(struct pci_dev *dev);
75void xen_pcibk_config_free_dyn_fields(struct pci_dev *dev);
76void xen_pcibk_config_reset_dev(struct pci_dev *dev);
77void xen_pcibk_config_free_dev(struct pci_dev *dev);
78int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
79 u32 *ret_val);
80int xen_pcibk_config_write(struct pci_dev *dev, int offset, int size,
81 u32 value);
82
83/* Handle requests for specific devices from the frontend */
84typedef int (*publish_pci_dev_cb) (struct xen_pcibk_device *pdev,
85 unsigned int domain, unsigned int bus,
86 unsigned int devfn, unsigned int devid);
87typedef int (*publish_pci_root_cb) (struct xen_pcibk_device *pdev,
88 unsigned int domain, unsigned int bus);
89
90/* Backend registration for the two types of BDF representation:
91 * vpci - BDFs start at 00
92 * passthrough - BDFs are exactly like in the host.
93 */
94struct xen_pcibk_backend {
95 const char *name;
96 int (*init)(struct xen_pcibk_device *pdev);
97 void (*free)(struct xen_pcibk_device *pdev);
98 int (*find)(struct pci_dev *pcidev, struct xen_pcibk_device *pdev,
99 unsigned int *domain, unsigned int *bus,
100 unsigned int *devfn);
101 int (*publish)(struct xen_pcibk_device *pdev, publish_pci_root_cb cb);
102 void (*release)(struct xen_pcibk_device *pdev, struct pci_dev *dev);
103 int (*add)(struct xen_pcibk_device *pdev, struct pci_dev *dev,
104 int devid, publish_pci_dev_cb publish_cb);
105 struct pci_dev *(*get)(struct xen_pcibk_device *pdev,
106 unsigned int domain, unsigned int bus,
107 unsigned int devfn);
108};
109
110extern const struct xen_pcibk_backend xen_pcibk_vpci_backend;
111extern const struct xen_pcibk_backend xen_pcibk_passthrough_backend;
112extern const struct xen_pcibk_backend *xen_pcibk_backend;
113
114static inline int xen_pcibk_add_pci_dev(struct xen_pcibk_device *pdev,
115 struct pci_dev *dev,
116 int devid,
117 publish_pci_dev_cb publish_cb)
118{
119 if (xen_pcibk_backend && xen_pcibk_backend->add)
120 return xen_pcibk_backend->add(pdev, dev, devid, publish_cb);
121 return -1;
122}
123
124static inline void xen_pcibk_release_pci_dev(struct xen_pcibk_device *pdev,
125 struct pci_dev *dev)
126{
127 if (xen_pcibk_backend && xen_pcibk_backend->free)
128 return xen_pcibk_backend->release(pdev, dev);
129}
130
131static inline struct pci_dev *
132xen_pcibk_get_pci_dev(struct xen_pcibk_device *pdev, unsigned int domain,
133 unsigned int bus, unsigned int devfn)
134{
135 if (xen_pcibk_backend && xen_pcibk_backend->get)
136 return xen_pcibk_backend->get(pdev, domain, bus, devfn);
137 return NULL;
138}
139
140/**
141* Add for domain0 PCIE-AER handling. Get guest domain/bus/devfn in xen_pcibk
142* before sending aer request to pcifront, so that guest could identify
143* device, coopearte with xen_pcibk to finish aer recovery job if device driver
144* has the capability
145*/
146static inline int xen_pcibk_get_pcifront_dev(struct pci_dev *pcidev,
147 struct xen_pcibk_device *pdev,
148 unsigned int *domain,
149 unsigned int *bus,
150 unsigned int *devfn)
151{
152 if (xen_pcibk_backend && xen_pcibk_backend->find)
153 return xen_pcibk_backend->find(pcidev, pdev, domain, bus,
154 devfn);
155 return -1;
156}
157
158static inline int xen_pcibk_init_devices(struct xen_pcibk_device *pdev)
159{
160 if (xen_pcibk_backend && xen_pcibk_backend->init)
161 return xen_pcibk_backend->init(pdev);
162 return -1;
163}
164
165static inline int xen_pcibk_publish_pci_roots(struct xen_pcibk_device *pdev,
166 publish_pci_root_cb cb)
167{
168 if (xen_pcibk_backend && xen_pcibk_backend->publish)
169 return xen_pcibk_backend->publish(pdev, cb);
170 return -1;
171}
172
173static inline void xen_pcibk_release_devices(struct xen_pcibk_device *pdev)
174{
175 if (xen_pcibk_backend && xen_pcibk_backend->free)
176 return xen_pcibk_backend->free(pdev);
177}
178
179/* Handles events from front-end */
180irqreturn_t xen_pcibk_handle_event(int irq, void *dev_id);
181void xen_pcibk_do_op(struct work_struct *data);
182
183int xen_pcibk_xenbus_register(void);
184void xen_pcibk_xenbus_unregister(void);
185
186extern int verbose_request;
187
188void xen_pcibk_test_and_schedule_op(struct xen_pcibk_device *pdev);
189#endif
190
191/* Handles shared IRQs that can to device domain and control domain. */
192void xen_pcibk_irq_handler(struct pci_dev *dev, int reset);