xen-pcifront.c

/*
 * Xen PCI Frontend.
 *
 *   Author: Ryan Wilson <hap9@epoch.ncsc.mil>
 */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <xen/xenbus.h>
#include <xen/events.h>
#include <xen/grant_table.h>
#include <xen/page.h>
#include <linux/spinlock.h>
#include <linux/pci.h>
#include <linux/msi.h>
#include <xen/interface/io/pciif.h>
#include <asm/xen/pci.h>
#include <linux/interrupt.h>
#include <linux/atomic.h>
#include <linux/workqueue.h>
#include <linux/bitops.h>
#include <linux/time.h>
#include <linux/ktime.h>
#include <xen/platform_pci.h>

#include <asm/xen/swiotlb-xen.h>
#define INVALID_GRANT_REF (0)
#define INVALID_EVTCHN    (-1)

struct pci_bus_entry {
	struct list_head list;
	struct pci_bus *bus;
};

#define _PDEVB_op_active		(0)
#define PDEVB_op_active			(1 << (_PDEVB_op_active))

struct pcifront_device {
	struct xenbus_device *xdev;
	struct list_head root_buses;

	int evtchn;
	int gnt_ref;

	int irq;

	/* Lock this when doing any operations in sh_info */
	spinlock_t sh_info_lock;
	struct xen_pci_sharedinfo *sh_info;
	struct work_struct op_work;
	unsigned long flags;

};

struct pcifront_sd {
	struct pci_sysdata sd;
	struct pcifront_device *pdev;
};

static inline struct pcifront_device *
pcifront_get_pdev(struct pcifront_sd *sd)
{
	return sd->pdev;
}

static inline void pcifront_init_sd(struct pcifront_sd *sd,
				    unsigned int domain, unsigned int bus,
				    struct pcifront_device *pdev)
{
	/* Because we do not expose that information via XenBus. */