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vdpasim: support batch updating

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The vDPA simulator support both set_map() and dma_map()/dma_unmap()
operations. But vhost-vdpa can only use one of them. So this patch
introduce a module parameter (batch_mapping) that let vpda_sim to
support only one of those dma operations. The batched mapping via
set_map() is enabled by default.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20200804162048.22587-6-eli@mellanox.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2020-08-04 19:20:41 +03:00 committed by Michael S. Tsirkin
parent 25abc060d2
commit de91a4d0e7
1 changed files with 37 additions and 3 deletions
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40
drivers/vdpa/vdpa_sim/vdpa_sim.c
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@ -34,6 +34,10 @@
#define DRV_DESC "vDPA Device Simulator"
#define DRV_LICENSE "GPL v2"
static int batch_mapping = 1;
module_param(batch_mapping, int, 0444);
MODULE_PARM_DESC(batch_mapping, "Batched mapping 1 -Enable; 0 - Disable");
struct vdpasim_virtqueue {
struct vringh vring;
struct vringh_kiov iov;
@ -334,15 +338,21 @@ static const struct dma_map_ops vdpasim_dma_ops = {
};
static const struct vdpa_config_ops vdpasim_net_config_ops;
static const struct vdpa_config_ops vdpasim_net_batch_config_ops;
static struct vdpasim *vdpasim_create(void)
{
const struct vdpa_config_ops *ops;
struct vdpasim *vdpasim;
struct device *dev;
int ret = -ENOMEM;
vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL,
&vdpasim_net_config_ops);
if (batch_mapping)
ops = &vdpasim_net_batch_config_ops;
else
ops = &vdpasim_net_config_ops;
vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops);
if (!vdpasim)
goto err_alloc;
@ -643,12 +653,36 @@ static const struct vdpa_config_ops vdpasim_net_config_ops = {
.get_config = vdpasim_get_config,
.set_config = vdpasim_set_config,
.get_generation = vdpasim_get_generation,
.set_map = vdpasim_set_map,
.dma_map = vdpasim_dma_map,
.dma_unmap = vdpasim_dma_unmap,
.free = vdpasim_free,
};
static const struct vdpa_config_ops vdpasim_net_batch_config_ops = {
.set_vq_address = vdpasim_set_vq_address,
.set_vq_num = vdpasim_set_vq_num,
.kick_vq = vdpasim_kick_vq,
.set_vq_cb = vdpasim_set_vq_cb,
.set_vq_ready = vdpasim_set_vq_ready,
.get_vq_ready = vdpasim_get_vq_ready,
.set_vq_state = vdpasim_set_vq_state,
.get_vq_state = vdpasim_get_vq_state,
.get_vq_align = vdpasim_get_vq_align,
.get_features = vdpasim_get_features,
.set_features = vdpasim_set_features,
.set_config_cb = vdpasim_set_config_cb,
.get_vq_num_max = vdpasim_get_vq_num_max,
.get_device_id = vdpasim_get_device_id,
.get_vendor_id = vdpasim_get_vendor_id,
.get_status = vdpasim_get_status,
.set_status = vdpasim_set_status,
.get_config = vdpasim_get_config,
.set_config = vdpasim_set_config,
.get_generation = vdpasim_get_generation,
.set_map = vdpasim_set_map,
.free = vdpasim_free,
};
static int __init vdpasim_dev_init(void)
{
vdpasim_dev = vdpasim_create();