pciback.h 4.5 KB

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