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gerrit-public.fairphone.software / kernel / msm-4.19 / 0513fe9e5b54e47e37217ea078dd870e3825e02d / . / drivers / xen / xen-pciback / pciback.h
blob: 5c140200a5ea8dcab6259d1a656b5adb43605661 [file] [log] [blame]
Konrad Rzeszutek Wilk30edc142009-10-13 17:22:20 -0400[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>
Konrad Rzeszutek Wilk8bfd4e02011-07-19 20:09:43 -0400[diff] [blame]15#include <linux/atomic.h>
Konrad Rzeszutek Wilk30edc142009-10-13 17:22:20 -0400[diff] [blame]16#include <xen/interface/io/pciif.h>
17
18struct pci_dev_entry {
19 struct list_head list;
20 struct pci_dev *dev;
21};
22
Konrad Rzeszutek Wilk8bfd4e02011-07-19 20:09:43 -0400[diff] [blame]23#define _PDEVF_op_active (0)
24#define PDEVF_op_active (1<<(_PDEVF_op_active))
Konrad Rzeszutek Wilk30edc142009-10-13 17:22:20 -0400[diff] [blame]25#define _PCIB_op_pending (1)
26#define PCIB_op_pending (1<<(_PCIB_op_pending))
27
28struct pciback_device {
29 void *pci_dev_data;
30 spinlock_t dev_lock;
31
32 struct xenbus_device *xdev;
33
34 struct xenbus_watch be_watch;
35 u8 be_watching;
36
37 int evtchn_irq;
38
39 struct xen_pci_sharedinfo *sh_info;
40
41 unsigned long flags;
42
43 struct work_struct op_work;
44};
45
46struct pciback_dev_data {
47 struct list_head config_fields;
Konrad Rzeszutek Wilk0513fe92011-07-19 18:56:39 -0400[diff] [blame^]48 unsigned int permissive:1;
49 unsigned int warned_on_write:1;
50 unsigned int enable_intx:1;
51 unsigned int isr_on:1; /* Whether the IRQ handler is installed. */
52 unsigned int ack_intr:1; /* .. and ACK-ing */
53 unsigned long handled;
54 unsigned int irq; /* Saved in case device transitions to MSI/MSI-X */
55 char irq_name[0]; /* pciback[000:04:00.0] */
Konrad Rzeszutek Wilk30edc142009-10-13 17:22:20 -0400[diff] [blame]56};
57
58/* Used by XenBus and pciback_ops.c */
59extern wait_queue_head_t aer_wait_queue;
60extern struct workqueue_struct *pciback_wq;
61/* Used by pcistub.c and conf_space_quirks.c */
62extern struct list_head pciback_quirks;
63
64/* Get/Put PCI Devices that are hidden from the PCI Backend Domain */
65struct pci_dev *pcistub_get_pci_dev_by_slot(struct pciback_device *pdev,
66 int domain, int bus,
67 int slot, int func);
68struct pci_dev *pcistub_get_pci_dev(struct pciback_device *pdev,
69 struct pci_dev *dev);
70void pcistub_put_pci_dev(struct pci_dev *dev);
71
72/* Ensure a device is turned off or reset */
73void pciback_reset_device(struct pci_dev *pdev);
74
75/* Access a virtual configuration space for a PCI device */
76int pciback_config_init(void);
77int pciback_config_init_dev(struct pci_dev *dev);
78void pciback_config_free_dyn_fields(struct pci_dev *dev);
79void pciback_config_reset_dev(struct pci_dev *dev);
80void pciback_config_free_dev(struct pci_dev *dev);
81int pciback_config_read(struct pci_dev *dev, int offset, int size,
82 u32 *ret_val);
83int pciback_config_write(struct pci_dev *dev, int offset, int size, u32 value);
84
85/* Handle requests for specific devices from the frontend */
86typedef int (*publish_pci_dev_cb) (struct pciback_device *pdev,
87 unsigned int domain, unsigned int bus,
88 unsigned int devfn, unsigned int devid);
89typedef int (*publish_pci_root_cb) (struct pciback_device *pdev,
90 unsigned int domain, unsigned int bus);
91int pciback_add_pci_dev(struct pciback_device *pdev, struct pci_dev *dev,
92 int devid, publish_pci_dev_cb publish_cb);
93void pciback_release_pci_dev(struct pciback_device *pdev, struct pci_dev *dev);
94struct pci_dev *pciback_get_pci_dev(struct pciback_device *pdev,
95 unsigned int domain, unsigned int bus,
96 unsigned int devfn);
97
98/**
99* Add for domain0 PCIE-AER handling. Get guest domain/bus/devfn in pciback
100* before sending aer request to pcifront, so that guest could identify
101* device, coopearte with pciback to finish aer recovery job if device driver
102* has the capability
103*/
104
105int pciback_get_pcifront_dev(struct pci_dev *pcidev,
106 struct pciback_device *pdev,
107 unsigned int *domain, unsigned int *bus,
108 unsigned int *devfn);
109int pciback_init_devices(struct pciback_device *pdev);
110int pciback_publish_pci_roots(struct pciback_device *pdev,
111 publish_pci_root_cb cb);
112void pciback_release_devices(struct pciback_device *pdev);
113
114/* Handles events from front-end */
115irqreturn_t pciback_handle_event(int irq, void *dev_id);
116void pciback_do_op(struct work_struct *data);
117
118int pciback_xenbus_register(void);
119void pciback_xenbus_unregister(void);
120
121#ifdef CONFIG_PCI_MSI
122int pciback_enable_msi(struct pciback_device *pdev,
123 struct pci_dev *dev, struct xen_pci_op *op);
124
125int pciback_disable_msi(struct pciback_device *pdev,
126 struct pci_dev *dev, struct xen_pci_op *op);
127
128
129int pciback_enable_msix(struct pciback_device *pdev,
130 struct pci_dev *dev, struct xen_pci_op *op);
131
132int pciback_disable_msix(struct pciback_device *pdev,
133 struct pci_dev *dev, struct xen_pci_op *op);
134#endif
135extern int verbose_request;
136
137void test_and_schedule_op(struct pciback_device *pdev);
138#endif
139
Konrad Rzeszutek Wilk0513fe92011-07-19 18:56:39 -0400[diff] [blame^]140/* Handles shared IRQs that can to device domain and control domain. */
141void pciback_irq_handler(struct pci_dev *dev, int reset);
142irqreturn_t pciback_guest_interrupt(int irq, void *dev_id);