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authorMohsin Kazmi <sykazmi@cisco.com>2019-05-01 14:26:17 +0200
committerDamjan Marion <dmarion@me.com>2019-05-06 16:33:12 +0000
commit0549378623484cc1d3f773669de4feed99a60019 (patch)
tree851565add763578d6750d730e358baf5fe16b5d4 /src/vnet/devices/virtio/pci.c
parent3a34b1d9366551bbff7eabff3ab48ec8189249e2 (diff)
virtio: refactor ctrl queue support
Change-Id: Ifb16351f39e5eb2cd154e70a1c96243e4842e80d Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Diffstat (limited to 'src/vnet/devices/virtio/pci.c')
-rw-r--r--src/vnet/devices/virtio/pci.c54
1 files changed, 32 insertions, 22 deletions
diff --git a/src/vnet/devices/virtio/pci.c b/src/vnet/devices/virtio/pci.c
index aeb519bb28d..825cba1bb60 100644
--- a/src/vnet/devices/virtio/pci.c
+++ b/src/vnet/devices/virtio/pci.c
@@ -452,31 +452,26 @@ debug_device_config_space (vlib_main_t * vm, virtio_if_t * vif)
}
}
-struct virtio_ctrl_mq_status_hdr
+struct virtio_ctrl_msg
{
struct virtio_net_ctrl_hdr ctrl;
- struct virtio_net_ctrl_mq num_mqs;
virtio_net_ctrl_ack status;
+ u8 data[1024];
};
static int
-virtio_pci_enable_multiqueue (vlib_main_t * vm, virtio_if_t * vif,
- u16 num_queues)
+virtio_pci_send_ctrl_msg (vlib_main_t * vm, virtio_if_t * vif,
+ struct virtio_ctrl_msg *data, u32 len)
{
virtio_main_t *vim = &virtio_main;
virtio_vring_t *vring = vif->cxq_vring;
+ virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
+ struct virtio_ctrl_msg result;
u32 buffer_index;
vlib_buffer_t *b;
u16 used, next, avail;
u16 sz = vring->size;
u16 mask = sz - 1;
- struct virtio_ctrl_mq_status_hdr mq_hdr, result;
- virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
-
- mq_hdr.ctrl.class = VIRTIO_NET_CTRL_MQ;
- mq_hdr.ctrl.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
- mq_hdr.status = VIRTIO_NET_ERR;
- mq_hdr.num_mqs.virtqueue_pairs = num_queues;
used = vring->desc_in_use;
next = vring->desc_next;
@@ -492,8 +487,8 @@ virtio_pci_enable_multiqueue (vlib_main_t * vm, virtio_if_t * vif,
* previous offset.
*/
b->current_data = 0;
- clib_memcpy (vlib_buffer_get_current (b), &mq_hdr,
- sizeof (struct virtio_ctrl_mq_status_hdr));
+ clib_memcpy (vlib_buffer_get_current (b), data,
+ sizeof (struct virtio_ctrl_msg));
d->flags = VRING_DESC_F_NEXT;
d->addr = vlib_buffer_get_current_pa (vm, b);
d->len = sizeof (struct virtio_net_ctrl_hdr);
@@ -506,8 +501,8 @@ virtio_pci_enable_multiqueue (vlib_main_t * vm, virtio_if_t * vif,
d = &vring->desc[next];
d->flags = VRING_DESC_F_NEXT;
d->addr = vlib_buffer_get_current_pa (vm, b) +
- STRUCT_OFFSET_OF (struct virtio_ctrl_mq_status_hdr, num_mqs);
- d->len = sizeof (struct virtio_net_ctrl_mq);
+ STRUCT_OFFSET_OF (struct virtio_ctrl_msg, data);
+ d->len = len;
next = (next + 1) & mask;
d->next = next;
used++;
@@ -515,8 +510,8 @@ virtio_pci_enable_multiqueue (vlib_main_t * vm, virtio_if_t * vif,
d = &vring->desc[next];
d->flags = VRING_DESC_F_WRITE;
d->addr = vlib_buffer_get_current_pa (vm, b) +
- STRUCT_OFFSET_OF (struct virtio_ctrl_mq_status_hdr, status);
- d->len = sizeof (mq_hdr.status);
+ STRUCT_OFFSET_OF (struct virtio_ctrl_msg, status);
+ d->len = sizeof (data->status);
next = (next + 1) & mask;
used++;
@@ -530,7 +525,6 @@ virtio_pci_enable_multiqueue (vlib_main_t * vm, virtio_if_t * vif,
virtio_kick (vm, vring, vif);
}
- clib_memset (&result, 0, sizeof (result));
u16 last = vring->last_used_idx, n_left = 0;
n_left = vring->used->idx - last;
@@ -555,15 +549,31 @@ virtio_pci_enable_multiqueue (vlib_main_t * vm, virtio_if_t * vif,
CLIB_MEMORY_BARRIER ();
clib_memcpy (&result, vlib_buffer_get_current (b),
- sizeof (struct virtio_ctrl_mq_status_hdr));
-
- virtio_log_debug (vim, vif, "multi-queue enable status on Ctrl queue : %u",
- result.status);
+ sizeof (struct virtio_ctrl_msg));
+ virtio_log_debug (vim, vif, "ctrl-queue: status %u", result.status);
status = result.status;
vlib_buffer_free (vm, &buffer_index, 1);
return status;
}
+static int
+virtio_pci_enable_multiqueue (vlib_main_t * vm, virtio_if_t * vif,
+ u16 num_queues)
+{
+ virtio_main_t *vim = &virtio_main;
+ struct virtio_ctrl_msg mq_hdr;
+ virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
+
+ mq_hdr.ctrl.class = VIRTIO_NET_CTRL_MQ;
+ mq_hdr.ctrl.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
+ mq_hdr.status = VIRTIO_NET_ERR;
+ clib_memcpy (mq_hdr.data, &num_queues, sizeof (num_queues));
+
+ status = virtio_pci_send_ctrl_msg (vm, vif, &mq_hdr, sizeof (num_queues));
+ virtio_log_debug (vim, vif, "multi-queue enable %u queues", num_queues);
+ return status;
+}
+
static u8
virtio_pci_queue_size_valid (u16 qsz)
{