| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Konrad Rzeszutek Wilk | 890 | 98.13% | 9 | 64.29% |
| Jan Beulich | 8 | 0.88% | 1 | 7.14% |
| Marek Marczykowski-Górecki | 6 | 0.66% | 1 | 7.14% |
| Greg Kroah-Hartman | 1 | 0.11% | 1 | 7.14% |
| Yang Zhang | 1 | 0.11% | 1 | 7.14% |
| Gustavo A. R. Silva | 1 | 0.11% | 1 | 7.14% |
| Total | 907 | 14 |
/* SPDX-License-Identifier: GPL-2.0 */ /* * 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 <linux/atomic.h> #include <xen/interface/io/pciif.h> #define DRV_NAME "xen-pciback" 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 xen_pcibk_device { void *pci_dev_data; struct mutex 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 xen_pci_op op; }; struct xen_pcibk_dev_data { struct list_head config_fields; struct pci_saved_state *pci_saved_state; unsigned int permissive:1; unsigned int allow_interrupt_control:1; unsigned int warned_on_write:1; unsigned int enable_intx:1; unsigned int isr_on:1; /* Whether the IRQ handler is installed. */ unsigned int ack_intr:1; /* .. and ACK-ing */ unsigned long handled; unsigned int irq; /* Saved in case device transitions to MSI/MSI-X */ char irq_name[]; /* xen-pcibk[000:04:00.0] */ }; /* Used by XenBus and xen_pcibk_ops.c */ extern wait_queue_head_t xen_pcibk_aer_wait_queue; /* Used by pcistub.c and conf_space_quirks.c */ extern struct list_head xen_pcibk_quirks; /* Get/Put PCI Devices that are hidden from the PCI Backend Domain */ struct pci_dev *pcistub_get_pci_dev_by_slot(struct xen_pcibk_device *pdev, int domain, int bus, int slot, int func); struct pci_dev *pcistub_get_pci_dev(struct xen_pcibk_device *pdev, struct pci_dev *dev); void pcistub_put_pci_dev(struct pci_dev *dev); /* Ensure a device is turned off or reset */ void xen_pcibk_reset_device(struct pci_dev *pdev); /* Access a virtual configuration space for a PCI device */ int xen_pcibk_config_init(void); int xen_pcibk_config_init_dev(struct pci_dev *dev); void xen_pcibk_config_free_dyn_fields(struct pci_dev *dev); void xen_pcibk_config_reset_dev(struct pci_dev *dev); void xen_pcibk_config_free_dev(struct pci_dev *dev); int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size, u32 *ret_val); int xen_pcibk_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 xen_pcibk_device *pdev, unsigned int domain, unsigned int bus, unsigned int devfn, unsigned int devid); typedef int (*publish_pci_root_cb) (struct xen_pcibk_device *pdev, unsigned int domain, unsigned int bus); /* Backend registration for the two types of BDF representation: * vpci - BDFs start at 00 * passthrough - BDFs are exactly like in the host. */ struct xen_pcibk_backend { const char *name; int (*init)(struct xen_pcibk_device *pdev); void (*free)(struct xen_pcibk_device *pdev); int (*find)(struct pci_dev *pcidev, struct xen_pcibk_device *pdev, unsigned int *domain, unsigned int *bus, unsigned int *devfn); int (*publish)(struct xen_pcibk_device *pdev, publish_pci_root_cb cb); void (*release)(struct xen_pcibk_device *pdev, struct pci_dev *dev, bool lock); int (*add)(struct xen_pcibk_device *pdev, struct pci_dev *dev, int devid, publish_pci_dev_cb publish_cb); struct pci_dev *(*get)(struct xen_pcibk_device *pdev, unsigned int domain, unsigned int bus, unsigned int devfn); }; extern const struct xen_pcibk_backend xen_pcibk_vpci_backend; extern const struct xen_pcibk_backend xen_pcibk_passthrough_backend; extern const struct xen_pcibk_backend *xen_pcibk_backend; static inline int xen_pcibk_add_pci_dev(struct xen_pcibk_device *pdev, struct pci_dev *dev, int devid, publish_pci_dev_cb publish_cb) { if (xen_pcibk_backend && xen_pcibk_backend->add) return xen_pcibk_backend->add(pdev, dev, devid, publish_cb); return -1; } static inline void xen_pcibk_release_pci_dev(struct xen_pcibk_device *pdev, struct pci_dev *dev, bool lock) { if (xen_pcibk_backend && xen_pcibk_backend->release) return xen_pcibk_backend->release(pdev, dev, lock); } static inline struct pci_dev * xen_pcibk_get_pci_dev(struct xen_pcibk_device *pdev, unsigned int domain, unsigned int bus, unsigned int devfn) { if (xen_pcibk_backend && xen_pcibk_backend->get) return xen_pcibk_backend->get(pdev, domain, bus, devfn); return NULL; } /** * Add for domain0 PCIE-AER handling. Get guest domain/bus/devfn in xen_pcibk * before sending aer request to pcifront, so that guest could identify * device, coopearte with xen_pcibk to finish aer recovery job if device driver * has the capability */ static inline int xen_pcibk_get_pcifront_dev(struct pci_dev *pcidev, struct xen_pcibk_device *pdev, unsigned int *domain, unsigned int *bus, unsigned int *devfn) { if (xen_pcibk_backend && xen_pcibk_backend->find) return xen_pcibk_backend->find(pcidev, pdev, domain, bus, devfn); return -1; } static inline int xen_pcibk_init_devices(struct xen_pcibk_device *pdev) { if (xen_pcibk_backend && xen_pcibk_backend->init) return xen_pcibk_backend->init(pdev); return -1; } static inline int xen_pcibk_publish_pci_roots(struct xen_pcibk_device *pdev, publish_pci_root_cb cb) { if (xen_pcibk_backend && xen_pcibk_backend->publish) return xen_pcibk_backend->publish(pdev, cb); return -1; } static inline void xen_pcibk_release_devices(struct xen_pcibk_device *pdev) { if (xen_pcibk_backend && xen_pcibk_backend->free) return xen_pcibk_backend->free(pdev); } /* Handles events from front-end */ irqreturn_t xen_pcibk_handle_event(int irq, void *dev_id); void xen_pcibk_do_op(struct work_struct *data); int xen_pcibk_xenbus_register(void); void xen_pcibk_xenbus_unregister(void); extern int verbose_request; void xen_pcibk_test_and_schedule_op(struct xen_pcibk_device *pdev); #endif /* Handles shared IRQs that can to device domain and control domain. */ void xen_pcibk_irq_handler(struct pci_dev *dev, int reset);
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