virtio-pci.h File Reference

Go to the source code of this file.

Defines
#define	VIRTIO_PCI_HOST_FEATURES   0
#define	VIRTIO_PCI_GUEST_FEATURES   4
#define	VIRTIO_PCI_QUEUE_PFN   8
#define	VIRTIO_PCI_QUEUE_NUM   12
#define	VIRTIO_PCI_QUEUE_SEL   14
#define	VIRTIO_PCI_QUEUE_NOTIFY   16
#define	VIRTIO_PCI_STATUS   18
#define	VIRTIO_PCI_ISR   19
#define	VIRTIO_PCI_ISR_CONFIG   0x2
#define	VIRTIO_PCI_CONFIG   20
#define	VIRTIO_PCI_ABI_VERSION   0
Functions
static u32	vp_get_features (unsigned int ioaddr)
static void	vp_set_features (unsigned int ioaddr, u32 features)
static void	vp_get (unsigned int ioaddr, unsigned offset, void *buf, unsigned len)
static u8	vp_get_status (unsigned int ioaddr)
static void	vp_set_status (unsigned int ioaddr, u8 status)
static void	vp_reset (unsigned int ioaddr)
static void	vp_notify (unsigned int ioaddr, int queue_index)
static void	vp_del_vq (unsigned int ioaddr, int queue_index)
int	vp_find_vq (unsigned int ioaddr, int queue_index, struct vring_virtqueue *vq)

---

Define Documentation

#define VIRTIO_PCI_HOST_FEATURES   0

Definition at line 5 of file virtio-pci.h.

Referenced by vp_get_features().

#define VIRTIO_PCI_GUEST_FEATURES   4

Definition at line 8 of file virtio-pci.h.

Referenced by vp_set_features().

#define VIRTIO_PCI_QUEUE_PFN   8

Definition at line 11 of file virtio-pci.h.

Referenced by vp_del_vq(), and vp_find_vq().

#define VIRTIO_PCI_QUEUE_NUM   12

Definition at line 14 of file virtio-pci.h.

Referenced by vp_find_vq().

#define VIRTIO_PCI_QUEUE_SEL   14

Definition at line 17 of file virtio-pci.h.

Referenced by vp_del_vq(), and vp_find_vq().

#define VIRTIO_PCI_QUEUE_NOTIFY   16

Definition at line 20 of file virtio-pci.h.

Referenced by vp_notify().

#define VIRTIO_PCI_STATUS   18

Definition at line 23 of file virtio-pci.h.

Referenced by vp_get_status(), vp_reset(), and vp_set_status().

#define VIRTIO_PCI_ISR   19

Definition at line 28 of file virtio-pci.h.

Referenced by vp_reset().

#define VIRTIO_PCI_ISR_CONFIG   0x2

Definition at line 31 of file virtio-pci.h.

#define VIRTIO_PCI_CONFIG   20

Definition at line 35 of file virtio-pci.h.

Referenced by vp_get().

#define VIRTIO_PCI_ABI_VERSION   0

Definition at line 38 of file virtio-pci.h.

---

Function Documentation

static u32 vp_get_features

(

unsigned int

ioaddr

)

[inline, static]

Definition at line 40 of file virtio-pci.h.

References inl, and VIRTIO_PCI_HOST_FEATURES.

Referenced by virtnet_probe().

{
   return inl(ioaddr + VIRTIO_PCI_HOST_FEATURES);
}

static void vp_set_features	(	unsigned int	ioaddr,
		u32	features
	)			[inline, static]

Definition at line 45 of file virtio-pci.h.

References outl, and VIRTIO_PCI_GUEST_FEATURES.

Referenced by virtnet_probe().

{
        outl(features, ioaddr + VIRTIO_PCI_GUEST_FEATURES);
}

static void vp_get	(	unsigned int	ioaddr,
		unsigned	offset,
		void *	buf,
		unsigned	len
	)			[inline, static]

Definition at line 50 of file virtio-pci.h.

References inb, u8, and VIRTIO_PCI_CONFIG.

Referenced by virtnet_probe().

{
   u8 *ptr = buf;
   unsigned i;

   for (i = 0; i < len; i++)
           ptr[i] = inb(ioaddr + VIRTIO_PCI_CONFIG + offset + i);
}

static u8 vp_get_status

(

unsigned int

ioaddr

)

[inline, static]

Definition at line 60 of file virtio-pci.h.

References inb, and VIRTIO_PCI_STATUS.

{
   return inb(ioaddr + VIRTIO_PCI_STATUS);
}

static void vp_set_status	(	unsigned int	ioaddr,
		u8	status
	)			[inline, static]

Definition at line 65 of file virtio-pci.h.

References outb, and VIRTIO_PCI_STATUS.

Referenced by virtnet_probe().

{
   if (status == 0)        /* reset */
           return;
   outb(status, ioaddr + VIRTIO_PCI_STATUS);
}

static void vp_reset

(

unsigned int

ioaddr

)

[inline, static]

Definition at line 73 of file virtio-pci.h.

References inb, outb, VIRTIO_PCI_ISR, and VIRTIO_PCI_STATUS.

Referenced by virtnet_disable(), and virtnet_probe().

{
   outb(0, ioaddr + VIRTIO_PCI_STATUS);
   (void)inb(ioaddr + VIRTIO_PCI_ISR);
}

static void vp_notify	(	unsigned int	ioaddr,
		int	queue_index
	)			[inline, static]

Definition at line 79 of file virtio-pci.h.

References outw, and VIRTIO_PCI_QUEUE_NOTIFY.

Referenced by vring_kick().

{
   outw(queue_index, ioaddr + VIRTIO_PCI_QUEUE_NOTIFY);
}

static void vp_del_vq	(	unsigned int	ioaddr,
		int	queue_index
	)			[inline, static]

Definition at line 84 of file virtio-pci.h.

References outl, outw, VIRTIO_PCI_QUEUE_PFN, and VIRTIO_PCI_QUEUE_SEL.

Referenced by virtnet_disable().

{
   /* select the queue */

   outw(queue_index, ioaddr + VIRTIO_PCI_QUEUE_SEL);

   /* deactivate the queue */

   outl(0, ioaddr + VIRTIO_PCI_QUEUE_PFN);
}

int vp_find_vq	(	unsigned int	ioaddr,
		int	queue_index,
		struct vring_virtqueue *	vq
	)

Definition at line 19 of file virtio-pci.c.

References vring::desc, inl, inw, MAX_QUEUE_NUM, vring::num, outl, outw, PAGE_SHIFT, printf(), vring_virtqueue::queue, vring_virtqueue::queue_index, u16, virt_to_phys(), VIRTIO_PCI_QUEUE_NUM, VIRTIO_PCI_QUEUE_PFN, VIRTIO_PCI_QUEUE_SEL, vring_virtqueue::vring, and vring_init().

Referenced by virtnet_probe().

{
   struct vring * vr = &vq->vring;
   u16 num;

   /* select the queue */

   outw(queue_index, ioaddr + VIRTIO_PCI_QUEUE_SEL);

   /* check if the queue is available */

   num = inw(ioaddr + VIRTIO_PCI_QUEUE_NUM);
   if (!num) {
           printf("ERROR: queue size is 0\n");
           return -1;
   }

   if (num > MAX_QUEUE_NUM) {
           printf("ERROR: queue size %d > %d\n", num, MAX_QUEUE_NUM);
           return -1;
   }

   /* check if the queue is already active */

   if (inl(ioaddr + VIRTIO_PCI_QUEUE_PFN)) {
           printf("ERROR: queue already active\n");
           return -1;
   }

   vq->queue_index = queue_index;

   /* initialize the queue */

   vring_init(vr, num, (unsigned char*)&vq->queue);

   /* activate the queue
    *
    * NOTE: vr->desc is initialized by vring_init()
    */

   outl((unsigned long)virt_to_phys(vr->desc) >> PAGE_SHIFT,
        ioaddr + VIRTIO_PCI_QUEUE_PFN);

   return num;
}