| Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 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> |
| 15 | #include <asm/atomic.h> |
| 16 | #include <xen/interface/io/pciif.h> |
| 17 | |
| 18 | struct pci_dev_entry { |
| 19 | struct list_head list; |
| 20 | struct pci_dev *dev; |
| 21 | }; |
| 22 | |
| 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)) |
| 27 | |
| 28 | struct 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 | |
| 46 | struct pciback_dev_data { |
| 47 | struct list_head config_fields; |
| 48 | int permissive; |
| 49 | int warned_on_write; |
| 50 | }; |
| 51 | |
| 52 | /* Used by XenBus and pciback_ops.c */ |
| 53 | extern wait_queue_head_t aer_wait_queue; |
| 54 | extern struct workqueue_struct *pciback_wq; |
| 55 | /* Used by pcistub.c and conf_space_quirks.c */ |
| 56 | extern struct list_head pciback_quirks; |
| 57 | |
| 58 | /* Get/Put PCI Devices that are hidden from the PCI Backend Domain */ |
| 59 | struct pci_dev *pcistub_get_pci_dev_by_slot(struct pciback_device *pdev, |
| 60 | int domain, int bus, |
| 61 | int slot, int func); |
| 62 | struct pci_dev *pcistub_get_pci_dev(struct pciback_device *pdev, |
| 63 | struct pci_dev *dev); |
| 64 | void pcistub_put_pci_dev(struct pci_dev *dev); |
| 65 | |
| 66 | /* Ensure a device is turned off or reset */ |
| 67 | void pciback_reset_device(struct pci_dev *pdev); |
| 68 | |
| 69 | /* Access a virtual configuration space for a PCI device */ |
| 70 | int pciback_config_init(void); |
| 71 | int pciback_config_init_dev(struct pci_dev *dev); |
| 72 | void pciback_config_free_dyn_fields(struct pci_dev *dev); |
| 73 | void pciback_config_reset_dev(struct pci_dev *dev); |
| 74 | void pciback_config_free_dev(struct pci_dev *dev); |
| 75 | int pciback_config_read(struct pci_dev *dev, int offset, int size, |
| 76 | u32 *ret_val); |
| 77 | int pciback_config_write(struct pci_dev *dev, int offset, int size, u32 value); |
| 78 | |
| 79 | /* Handle requests for specific devices from the frontend */ |
| 80 | typedef int (*publish_pci_dev_cb) (struct pciback_device *pdev, |
| 81 | unsigned int domain, unsigned int bus, |
| 82 | unsigned int devfn, unsigned int devid); |
| 83 | typedef int (*publish_pci_root_cb) (struct pciback_device *pdev, |
| 84 | unsigned int domain, unsigned int bus); |
| 85 | int pciback_add_pci_dev(struct pciback_device *pdev, struct pci_dev *dev, |
| 86 | int devid, publish_pci_dev_cb publish_cb); |
| 87 | void pciback_release_pci_dev(struct pciback_device *pdev, struct pci_dev *dev); |
| 88 | struct pci_dev *pciback_get_pci_dev(struct pciback_device *pdev, |
| 89 | unsigned int domain, unsigned int bus, |
| 90 | unsigned int devfn); |
| 91 | |
| 92 | /** |
| 93 | * Add for domain0 PCIE-AER handling. Get guest domain/bus/devfn in pciback |
| 94 | * before sending aer request to pcifront, so that guest could identify |
| 95 | * device, coopearte with pciback to finish aer recovery job if device driver |
| 96 | * has the capability |
| 97 | */ |
| 98 | |
| 99 | int pciback_get_pcifront_dev(struct pci_dev *pcidev, |
| 100 | struct pciback_device *pdev, |
| 101 | unsigned int *domain, unsigned int *bus, |
| 102 | unsigned int *devfn); |
| 103 | int pciback_init_devices(struct pciback_device *pdev); |
| 104 | int pciback_publish_pci_roots(struct pciback_device *pdev, |
| 105 | publish_pci_root_cb cb); |
| 106 | void pciback_release_devices(struct pciback_device *pdev); |
| 107 | |
| 108 | /* Handles events from front-end */ |
| 109 | irqreturn_t pciback_handle_event(int irq, void *dev_id); |
| 110 | void pciback_do_op(struct work_struct *data); |
| 111 | |
| 112 | int pciback_xenbus_register(void); |
| 113 | void pciback_xenbus_unregister(void); |
| 114 | |
| 115 | #ifdef CONFIG_PCI_MSI |
| 116 | int pciback_enable_msi(struct pciback_device *pdev, |
| 117 | struct pci_dev *dev, struct xen_pci_op *op); |
| 118 | |
| 119 | int pciback_disable_msi(struct pciback_device *pdev, |
| 120 | struct pci_dev *dev, struct xen_pci_op *op); |
| 121 | |
| 122 | |
| 123 | int pciback_enable_msix(struct pciback_device *pdev, |
| 124 | struct pci_dev *dev, struct xen_pci_op *op); |
| 125 | |
| 126 | int pciback_disable_msix(struct pciback_device *pdev, |
| 127 | struct pci_dev *dev, struct xen_pci_op *op); |
| 128 | #endif |
| 129 | extern int verbose_request; |
| 130 | |
| 131 | void test_and_schedule_op(struct pciback_device *pdev); |
| 132 | #endif |
| 133 | |