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Date: Tue, 4 Aug 2020 19:20:42 +0300
From: Eli Cohen <eli@...lanox.com>
To: mst@...hat.com, jasowang@...hat.com,
virtualization@...ts.linux-foundation.org,
linux-kernel@...r.kernel.org
Cc: shahafs@...lanox.com, saeedm@...lanox.com, parav@...lanox.com,
Max Gurtovoy <maxg@...lanox.com>
Subject: [PATCH V4 linux-next 06/12] vdpa: remove hard coded virtq num
From: Max Gurtovoy <maxg@...lanox.com>
This will enable vdpa providers to add support for multi queue feature
and publish it to upper layers (vhost and virtio).
Signed-off-by: Max Gurtovoy <maxg@...lanox.com>
Reviewed-by: Jason Wang <jasowang@...hat.com>
---
drivers/vdpa/ifcvf/ifcvf_main.c | 3 ++-
drivers/vdpa/vdpa.c | 3 +++
drivers/vdpa/vdpa_sim/vdpa_sim.c | 4 ++--
drivers/vhost/vdpa.c | 9 +++------
include/linux/vdpa.h | 6 ++++--
5 files changed, 14 insertions(+), 11 deletions(-)
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index a902b29b0d29..7c93225367db 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -431,7 +431,8 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
}
adapter = vdpa_alloc_device(struct ifcvf_adapter, vdpa,
- dev, &ifc_vdpa_ops);
+ dev, &ifc_vdpa_ops,
+ IFCVF_MAX_QUEUE_PAIRS * 2);
if (adapter == NULL) {
IFCVF_ERR(pdev, "Failed to allocate vDPA structure");
return -ENOMEM;
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index 7105265e4793..a69ffc991e13 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -61,6 +61,7 @@ static void vdpa_release_dev(struct device *d)
* initialized but before registered.
* @parent: the parent device
* @config: the bus operations that is supported by this device
+ * @nvqs: number of virtqueues supported by this device
* @size: size of the parent structure that contains private data
*
* Driver should use vdpa_alloc_device() wrapper macro instead of
@@ -71,6 +72,7 @@ static void vdpa_release_dev(struct device *d)
*/
struct vdpa_device *__vdpa_alloc_device(struct device *parent,
const struct vdpa_config_ops *config,
+ int nvqs,
size_t size)
{
struct vdpa_device *vdev;
@@ -97,6 +99,7 @@ struct vdpa_device *__vdpa_alloc_device(struct device *parent,
vdev->index = err;
vdev->config = config;
vdev->features_valid = false;
+ vdev->nvqs = nvqs;
err = dev_set_name(&vdev->dev, "vdpa%u", vdev->index);
if (err)
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 07ded545197d..676cb2f53202 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -65,7 +65,7 @@ static u64 vdpasim_features = (1ULL << VIRTIO_F_ANY_LAYOUT) |
/* State of each vdpasim device */
struct vdpasim {
struct vdpa_device vdpa;
- struct vdpasim_virtqueue vqs[2];
+ struct vdpasim_virtqueue vqs[VDPASIM_VQ_NUM];
struct work_struct work;
/* spinlock to synchronize virtqueue state */
spinlock_t lock;
@@ -352,7 +352,7 @@ static struct vdpasim *vdpasim_create(void)
else
ops = &vdpasim_net_config_ops;
- vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops);
+ vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops, VDPASIM_VQ_NUM);
if (!vdpasim)
goto err_alloc;
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 0a143615e69d..0049e34f7ca6 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -32,9 +32,6 @@ enum {
(1ULL << VHOST_BACKEND_F_IOTLB_BATCH),
};
-/* Currently, only network backend w/o multiqueue is supported. */
-#define VHOST_VDPA_VQ_MAX 2
-
#define VHOST_VDPA_DEV_MAX (1U << MINORBITS)
struct vhost_vdpa {
@@ -947,7 +944,7 @@ static int vhost_vdpa_probe(struct vdpa_device *vdpa)
{
const struct vdpa_config_ops *ops = vdpa->config;
struct vhost_vdpa *v;
- int minor, nvqs = VHOST_VDPA_VQ_MAX;
+ int minor;
int r;
/* Currently, we only accept the network devices. */
@@ -968,14 +965,14 @@ static int vhost_vdpa_probe(struct vdpa_device *vdpa)
atomic_set(&v->opened, 0);
v->minor = minor;
v->vdpa = vdpa;
- v->nvqs = nvqs;
+ v->nvqs = vdpa->nvqs;
v->virtio_id = ops->get_device_id(vdpa);
device_initialize(&v->dev);
v->dev.release = vhost_vdpa_release_dev;
v->dev.parent = &vdpa->dev;
v->dev.devt = MKDEV(MAJOR(vhost_vdpa_major), minor);
- v->vqs = kmalloc_array(nvqs, sizeof(struct vhost_virtqueue),
+ v->vqs = kmalloc_array(v->nvqs, sizeof(struct vhost_virtqueue),
GFP_KERNEL);
if (!v->vqs) {
r = -ENOMEM;
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 9f50af7dc4a1..7b1e9df8fc11 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -41,6 +41,7 @@ struct vdpa_device {
const struct vdpa_config_ops *config;
unsigned int index;
bool features_valid;
+ int nvqs;
};
/**
@@ -216,11 +217,12 @@ struct vdpa_config_ops {
struct vdpa_device *__vdpa_alloc_device(struct device *parent,
const struct vdpa_config_ops *config,
+ int nvqs,
size_t size);
-#define vdpa_alloc_device(dev_struct, member, parent, config) \
+#define vdpa_alloc_device(dev_struct, member, parent, config, nvqs) \
container_of(__vdpa_alloc_device( \
- parent, config, \
+ parent, config, nvqs, \
sizeof(dev_struct) + \
BUILD_BUG_ON_ZERO(offsetof( \
dev_struct, member))), \
--
2.26.0
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