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Message-Id: <20201215144256.155342-4-sgarzare@redhat.com>
Date: Tue, 15 Dec 2020 15:42:41 +0100
From: Stefano Garzarella <sgarzare@...hat.com>
To: virtualization@...ts.linux-foundation.org
Cc: Oren Duer <oren@...dia.com>, Laurent Vivier <lvivier@...hat.com>,
Max Gurtovoy <mgurtovoy@...dia.com>,
Randy Dunlap <rdunlap@...radead.org>,
Shahaf Shuler <shahafs@...dia.com>,
Stefan Hajnoczi <stefanha@...hat.com>,
"Michael S. Tsirkin" <mst@...hat.com>, Eli Cohen <elic@...dia.com>,
linux-kernel@...r.kernel.org,
Stefano Garzarella <sgarzare@...hat.com>,
Jason Wang <jasowang@...hat.com>
Subject: [PATCH v4 03/18] vdpa_sim: remove hard-coded virtq count
From: Max Gurtovoy <mgurtovoy@...dia.com>
Add a new attribute that will define the number of virt queues to be
created for the vdpasim device.
Signed-off-by: Max Gurtovoy <mgurtovoy@...dia.com>
[sgarzare: replace kmalloc_array() with kcalloc()]
Acked-by: Jason Wang <jasowang@...hat.com>
Signed-off-by: Stefano Garzarella <sgarzare@...hat.com>
---
v1:
- use kcalloc() instead of kmalloc_array() since some function expects
variables initialized to zero
---
drivers/vdpa/vdpa_sim/vdpa_sim.c | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 63b85541fb5e..07ccc8609784 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -63,7 +63,7 @@ static u64 vdpasim_features = (1ULL << VIRTIO_F_ANY_LAYOUT) |
/* State of each vdpasim device */
struct vdpasim {
struct vdpa_device vdpa;
- struct vdpasim_virtqueue vqs[VDPASIM_VQ_NUM];
+ struct vdpasim_virtqueue *vqs;
struct work_struct work;
/* spinlock to synchronize virtqueue state */
spinlock_t lock;
@@ -73,6 +73,7 @@ struct vdpasim {
u32 status;
u32 generation;
u64 features;
+ int nvqs;
/* spinlock to synchronize iommu table */
spinlock_t iommu_lock;
};
@@ -137,7 +138,7 @@ static void vdpasim_reset(struct vdpasim *vdpasim)
{
int i;
- for (i = 0; i < VDPASIM_VQ_NUM; i++)
+ for (i = 0; i < vdpasim->nvqs; i++)
vdpasim_vq_reset(&vdpasim->vqs[i]);
spin_lock(&vdpasim->iommu_lock);
@@ -343,7 +344,7 @@ static struct vdpasim *vdpasim_create(void)
const struct vdpa_config_ops *ops;
struct vdpasim *vdpasim;
struct device *dev;
- int ret = -ENOMEM;
+ int i, ret = -ENOMEM;
if (batch_mapping)
ops = &vdpasim_net_batch_config_ops;
@@ -354,6 +355,7 @@ static struct vdpasim *vdpasim_create(void)
if (!vdpasim)
goto err_alloc;
+ vdpasim->nvqs = VDPASIM_VQ_NUM;
INIT_WORK(&vdpasim->work, vdpasim_work);
spin_lock_init(&vdpasim->lock);
spin_lock_init(&vdpasim->iommu_lock);
@@ -364,6 +366,11 @@ static struct vdpasim *vdpasim_create(void)
goto err_iommu;
set_dma_ops(dev, &vdpasim_dma_ops);
+ vdpasim->vqs = kcalloc(vdpasim->nvqs, sizeof(struct vdpasim_virtqueue),
+ GFP_KERNEL);
+ if (!vdpasim->vqs)
+ goto err_iommu;
+
vdpasim->iommu = vhost_iotlb_alloc(2048, 0);
if (!vdpasim->iommu)
goto err_iommu;
@@ -382,8 +389,8 @@ static struct vdpasim *vdpasim_create(void)
eth_random_addr(vdpasim->config.mac);
}
- vringh_set_iotlb(&vdpasim->vqs[0].vring, vdpasim->iommu);
- vringh_set_iotlb(&vdpasim->vqs[1].vring, vdpasim->iommu);
+ for (i = 0; i < vdpasim->nvqs; i++)
+ vringh_set_iotlb(&vdpasim->vqs[i].vring, vdpasim->iommu);
vdpasim->vdpa.dma_dev = dev;
ret = vdpa_register_device(&vdpasim->vdpa);
@@ -652,6 +659,7 @@ static void vdpasim_free(struct vdpa_device *vdpa)
kfree(vdpasim->buffer);
if (vdpasim->iommu)
vhost_iotlb_free(vdpasim->iommu);
+ kfree(vdpasim->vqs);
}
static const struct vdpa_config_ops vdpasim_net_config_ops = {
--
2.26.2
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