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Diffstat (limited to 'qemu/roms/SLOF/lib/libvirtio/virtio-scsi.c')
-rw-r--r--qemu/roms/SLOF/lib/libvirtio/virtio-scsi.c155
1 files changed, 0 insertions, 155 deletions
diff --git a/qemu/roms/SLOF/lib/libvirtio/virtio-scsi.c b/qemu/roms/SLOF/lib/libvirtio/virtio-scsi.c
deleted file mode 100644
index 04181b06c..000000000
--- a/qemu/roms/SLOF/lib/libvirtio/virtio-scsi.c
+++ /dev/null
@@ -1,155 +0,0 @@
-/******************************************************************************
- * Copyright (c) 2012 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 <stdio.h>
-#include <string.h>
-#include <cpu.h>
-#include <helpers.h>
-#include "virtio.h"
-#include "virtio-internal.h"
-#include "virtio-scsi.h"
-
-int virtioscsi_send(struct virtio_device *dev,
- struct virtio_scsi_req_cmd *req,
- struct virtio_scsi_resp_cmd *resp,
- int is_read, void *buf, uint64_t buf_len)
-{
- struct vring_desc *vq_desc; /* Descriptor vring */
- struct vring_avail *vq_avail; /* "Available" vring */
- struct vring_used *vq_used; /* "Used" vring */
-
- volatile uint16_t *current_used_idx;
- uint16_t last_used_idx, avail_idx;
- int id;
- uint32_t vq_size, time;
-
- int vq = VIRTIO_SCSI_REQUEST_VQ;
-
- vq_size = virtio_get_qsize(dev, vq);
- vq_desc = virtio_get_vring_desc(dev, vq);
- vq_avail = virtio_get_vring_avail(dev, vq);
- vq_used = virtio_get_vring_used(dev, vq);
-
- avail_idx = virtio_modern16_to_cpu(dev, vq_avail->idx);
-
- last_used_idx = vq_used->idx;
- current_used_idx = &vq_used->idx;
-
- /* Determine descriptor index */
- id = (avail_idx * 3) % vq_size;
- virtio_fill_desc(&vq_desc[id], dev->is_modern, (uint64_t)req, sizeof(*req), VRING_DESC_F_NEXT,
- (id + 1) % vq_size);
-
- /* Set up virtqueue descriptor for data */
- if (buf && buf_len) {
- virtio_fill_desc(&vq_desc[(id + 1) % vq_size], dev->is_modern,
- (uint64_t)resp, sizeof(*resp),
- VRING_DESC_F_NEXT | VRING_DESC_F_WRITE,
- (id + 2) % vq_size);
- /* Set up virtqueue descriptor for status */
- virtio_fill_desc(&vq_desc[(id + 2) % vq_size], dev->is_modern,
- (uint64_t)buf, buf_len,
- (is_read ? VRING_DESC_F_WRITE : 0), 0);
- } else {
- virtio_fill_desc(&vq_desc[(id + 1) % vq_size], dev->is_modern,
- (uint64_t)resp, sizeof(*resp),
- VRING_DESC_F_WRITE, 0);
- }
-
- vq_avail->ring[avail_idx % vq_size] = virtio_cpu_to_modern16(dev, id);
- mb();
- vq_avail->idx = virtio_cpu_to_modern16(dev, avail_idx + 1);
-
- /* Tell HV that the vq is ready */
- virtio_queue_notify(dev, vq);
-
- /* Wait for host to consume the descriptor */
- time = SLOF_GetTimer() + VIRTIO_TIMEOUT;
- while (*current_used_idx == last_used_idx) {
- // do something better
- mb();
- if (time < SLOF_GetTimer())
- break;
- }
-
- return 0;
-}
-
-/**
- * Initialize virtio-block device.
- * @param dev pointer to virtio device information
- */
-int virtioscsi_init(struct virtio_device *dev)
-{
- struct vring_avail *vq_avail;
- unsigned int idx = 0;
- int qsize = 0;
- int status = VIRTIO_STAT_ACKNOWLEDGE;
-
- /* Reset device */
- // XXX That will clear the virtq base. We need to move
- // initializing it to here anyway
- //
- // virtio_reset_device(dev);
-
- /* Acknowledge device. */
- virtio_set_status(dev, status);
-
- /* Tell HV that we know how to drive the device. */
- status |= VIRTIO_STAT_DRIVER;
- virtio_set_status(dev, status);
-
- /* Device specific setup - we do not support special features right now */
- if (dev->is_modern) {
- if (virtio_negotiate_guest_features(dev, VIRTIO_F_VERSION_1))
- goto dev_error;
- virtio_get_status(dev, &status);
- } else {
- virtio_set_guest_features(dev, 0);
- }
-
- while(1) {
- qsize = virtio_get_qsize(dev, idx);
- if (!qsize)
- break;
- virtio_vring_size(qsize);
-
- vq_avail = virtio_get_vring_avail(dev, idx);
- vq_avail->flags = virtio_cpu_to_modern16(dev, VRING_AVAIL_F_NO_INTERRUPT);
- vq_avail->idx = 0;
- idx++;
- }
-
- /* Tell HV that setup succeeded */
- status |= VIRTIO_STAT_DRIVER_OK;
- virtio_set_status(dev, status);
-
- return 0;
-dev_error:
- printf("%s: failed\n", __func__);
- status |= VIRTIO_STAT_FAILED;
- virtio_set_status(dev, status);
- return -1;
-}
-
-/**
- * Shutdown the virtio-block device.
- * @param dev pointer to virtio device information
- */
-void virtioscsi_shutdown(struct virtio_device *dev)
-{
- /* Quiesce device */
- virtio_set_status(dev, VIRTIO_STAT_FAILED);
-
- /* Reset device */
- virtio_reset_device(dev);
-}