diff options
Diffstat (limited to 'drivers/xen/xen-pciback/pciback.h')
| -rw-r--r-- | drivers/xen/xen-pciback/pciback.h | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/drivers/xen/xen-pciback/pciback.h b/drivers/xen/xen-pciback/pciback.h new file mode 100644 index 000000000000..98e29127abf9 --- /dev/null +++ b/drivers/xen/xen-pciback/pciback.h @@ -0,0 +1,133 @@ +/* + * PCI Backend Common Data Structures & Function Declarations + * + * Author: Ryan Wilson <hap9@epoch.ncsc.mil> + */ +#ifndef __XEN_PCIBACK_H__ +#define __XEN_PCIBACK_H__ + +#include <linux/pci.h> +#include <linux/interrupt.h> +#include <xen/xenbus.h> +#include <linux/list.h> +#include <linux/spinlock.h> +#include <linux/workqueue.h> +#include <asm/atomic.h> +#include <xen/interface/io/pciif.h> + +struct pci_dev_entry { + struct list_head list; + struct pci_dev *dev; +}; + +#define _PDEVF_op_active (0) +#define PDEVF_op_active (1<<(_PDEVF_op_active)) +#define _PCIB_op_pending (1) +#define PCIB_op_pending (1<<(_PCIB_op_pending)) + +struct pciback_device { + void *pci_dev_data; + spinlock_t dev_lock; + + struct xenbus_device *xdev; + + struct xenbus_watch be_watch; + u8 be_watching; + + int evtchn_irq; + + struct xen_pci_sharedinfo *sh_info; + + unsigned long flags; + + struct work_struct op_work; +}; + +struct pciback_dev_data { + struct list_head config_fields; + int permissive; + int warned_on_write; +}; + +/* Used by XenBus and pciback_ops.c */ +extern wait_queue_head_t aer_wait_queue; +extern struct workqueue_struct *pciback_wq; +/* Used by pcistub.c and conf_space_quirks.c */ +extern struct list_head pciback_quirks; + +/* Get/Put PCI Devices that are hidden from the PCI Backend Domain */ +struct pci_dev *pcistub_get_pci_dev_by_slot(struct pciback_device *pdev, + int domain, int bus, + int slot, int func); +struct pci_dev *pcistub_get_pci_dev(struct pciback_device *pdev, + struct pci_dev *dev); +void pcistub_put_pci_dev(struct pci_dev *dev); + +/* Ensure a device is turned off or reset */ +void pciback_reset_device(struct pci_dev *pdev); + +/* Access a virtual configuration space for a PCI device */ +int pciback_config_init(void); +int pciback_config_init_dev(struct pci_dev *dev); +void pciback_config_free_dyn_fields(struct pci_dev *dev); +void pciback_config_reset_dev(struct pci_dev *dev); +void pciback_config_free_dev(struct pci_dev *dev); +int pciback_config_read(struct pci_dev *dev, int offset, int size, + u32 *ret_val); +int pciback_config_write(struct pci_dev *dev, int offset, int size, u32 value); + +/* Handle requests for specific devices from the frontend */ +typedef int (*publish_pci_dev_cb) (struct pciback_device *pdev, + unsigned int domain, unsigned int bus, + unsigned int devfn, unsigned int devid); +typedef int (*publish_pci_root_cb) (struct pciback_device *pdev, + unsigned int domain, unsigned int bus); +int pciback_add_pci_dev(struct pciback_device *pdev, struct pci_dev *dev, + int devid, publish_pci_dev_cb publish_cb); +void pciback_release_pci_dev(struct pciback_device *pdev, struct pci_dev *dev); +struct pci_dev *pciback_get_pci_dev(struct pciback_device *pdev, + unsigned int domain, unsigned int bus, + unsigned int devfn); + +/** +* Add for domain0 PCIE-AER handling. Get guest domain/bus/devfn in pciback +* before sending aer request to pcifront, so that guest could identify +* device, coopearte with pciback to finish aer recovery job if device driver +* has the capability +*/ + +int pciback_get_pcifront_dev(struct pci_dev *pcidev, + struct pciback_device *pdev, + unsigned int *domain, unsigned int *bus, + unsigned int *devfn); +int pciback_init_devices(struct pciback_device *pdev); +int pciback_publish_pci_roots(struct pciback_device *pdev, + publish_pci_root_cb cb); +void pciback_release_devices(struct pciback_device *pdev); + +/* Handles events from front-end */ +irqreturn_t pciback_handle_event(int irq, void *dev_id); +void pciback_do_op(struct work_struct *data); + +int pciback_xenbus_register(void); +void pciback_xenbus_unregister(void); + +#ifdef CONFIG_PCI_MSI +int pciback_enable_msi(struct pciback_device *pdev, + struct pci_dev *dev, struct xen_pci_op *op); + +int pciback_disable_msi(struct pciback_device *pdev, + struct pci_dev *dev, struct xen_pci_op *op); + + +int pciback_enable_msix(struct pciback_device *pdev, + struct pci_dev *dev, struct xen_pci_op *op); + +int pciback_disable_msix(struct pciback_device *pdev, + struct pci_dev *dev, struct xen_pci_op *op); +#endif +extern int verbose_request; + +void test_and_schedule_op(struct pciback_device *pdev); +#endif + |