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Diffstat (limited to 'lib/libhvcall/virtio.c')
| -rw-r--r-- | lib/libhvcall/virtio.c | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/lib/libhvcall/virtio.c b/lib/libhvcall/virtio.c deleted file mode 100644 index 0a3e91b..0000000 --- a/lib/libhvcall/virtio.c +++ /dev/null @@ -1,192 +0,0 @@ -/****************************************************************************** - * Copyright (c) 2011 IBM Corporation - * All rights reserved. - * This program and the accompanying materials - * are made available under the terms of the BSD License - * which accompanies this distribution, and is available at - * http://www.opensource.org/licenses/bsd-license.php - * - * Contributors: - * IBM Corporation - initial implementation - *****************************************************************************/ - -#include <cpu.h> -#include <cache.h> -#include <byteorder.h> -#include "virtio.h" -#include "libhvcall.h" - -/* PCI virtio header offsets */ -#define VIRTIOHDR_DEVICE_FEATURES 0 -#define VIRTIOHDR_GUEST_FEATURES 4 -#define VIRTIOHDR_QUEUE_ADDRESS 8 -#define VIRTIOHDR_QUEUE_SIZE 12 -#define VIRTIOHDR_QUEUE_SELECT 14 -#define VIRTIOHDR_QUEUE_NOTIFY 16 -#define VIRTIOHDR_DEVICE_STATUS 18 -#define VIRTIOHDR_ISR_STATUS 19 -#define VIRTIOHDR_DEVICE_CONFIG 20 - - -/** - * Calculate ring size according to queue size number - */ -unsigned long virtio_vring_size(unsigned int qsize) -{ - return VQ_ALIGN(sizeof(struct vring_desc) * qsize + 2 * (2 + qsize)) - + VQ_ALIGN(sizeof(struct vring_used_elem) * qsize); -} - - -/** - * Get number of elements in a vring - * @param dev pointer to virtio device information - * @param queue virtio queue number - * @return number of elements - */ -int virtio_get_qsize(struct virtio_device *dev, int queue) -{ - int size = 0; - - if (dev->type == VIRTIO_TYPE_PCI) { - ci_write_16(dev->base+VIRTIOHDR_QUEUE_SELECT, - cpu_to_le16(queue)); - eieio(); - size = le16_to_cpu(ci_read_16(dev->base+VIRTIOHDR_QUEUE_SIZE)); - } - - return size; -} - - -/** - * Get address of descriptor vring - * @param dev pointer to virtio device information - * @param queue virtio queue number - * @return pointer to the descriptor ring - */ -struct vring_desc *virtio_get_vring_desc(struct virtio_device *dev, int queue) -{ - struct vring_desc *desc = 0; - - if (dev->type == VIRTIO_TYPE_PCI) { - ci_write_16(dev->base+VIRTIOHDR_QUEUE_SELECT, - cpu_to_le16(queue)); - eieio(); - desc = (void*)(4096L * - le32_to_cpu(ci_read_32(dev->base+VIRTIOHDR_QUEUE_ADDRESS))); - } - - return desc; -} - - -/** - * Get address of "available" vring - * @param dev pointer to virtio device information - * @param queue virtio queue number - * @return pointer to the "available" ring - */ -struct vring_avail *virtio_get_vring_avail(struct virtio_device *dev, int queue) -{ - return (void*)((uint64_t)virtio_get_vring_desc(dev, queue) - + virtio_get_qsize(dev, queue) * sizeof(struct vring_desc)); -} - - -/** - * Get address of "used" vring - * @param dev pointer to virtio device information - * @param queue virtio queue number - * @return pointer to the "used" ring - */ -struct vring_used *virtio_get_vring_used(struct virtio_device *dev, int queue) -{ - return (void*)VQ_ALIGN((uint64_t)virtio_get_vring_avail(dev, queue) - + virtio_get_qsize(dev, queue) - * sizeof(struct vring_avail)); -} - - -/** - * Reset virtio device - */ -void virtio_reset_device(struct virtio_device *dev) -{ - if (dev->type == VIRTIO_TYPE_PCI) { - ci_write_8(dev->base+VIRTIOHDR_DEVICE_STATUS, 0); - } -} - - -/** - * Notify hypervisor about queue update - */ -void virtio_queue_notify(struct virtio_device *dev, int queue) -{ - if (dev->type == VIRTIO_TYPE_PCI) { - ci_write_16(dev->base+VIRTIOHDR_QUEUE_NOTIFY, cpu_to_le16(queue)); - } -} - - -/** - * Set device status bits - */ -void virtio_set_status(struct virtio_device *dev, int status) -{ - if (dev->type == VIRTIO_TYPE_PCI) { - ci_write_8(dev->base+VIRTIOHDR_DEVICE_STATUS, status); - } -} - - -/** - * Set guest feature bits - */ -void virtio_set_guest_features(struct virtio_device *dev, int features) - -{ - if (dev->type == VIRTIO_TYPE_PCI) { - ci_write_32(dev->base+VIRTIOHDR_GUEST_FEATURES, features); - } -} - - -/** - * Get additional config values - */ -uint64_t virtio_get_config(struct virtio_device *dev, int offset, int size) -{ - uint64_t val = ~0ULL; - void *confbase; - - switch (dev->type) { - case VIRTIO_TYPE_PCI: - confbase = dev->base+VIRTIOHDR_DEVICE_CONFIG; - break; - default: - return ~0ULL; - } - switch (size) { - case 1: - val = ci_read_8(confbase+offset); - break; - case 2: - val = ci_read_16(confbase+offset); - break; - case 4: - val = ci_read_32(confbase+offset); - break; - case 8: - /* We don't support 8 bytes PIO accesses - * in qemu and this is all PIO - */ - val = ci_read_32(confbase+offset); - val <<= 32; - val |= ci_read_32(confbase+offset+4); - break; - } - - return val; -} |