Re: [PATCH RFC 06/12] vdpa_sim: add struct vdpasim_device to store device properties

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On 2020/11/13 下午9:47, Stefano Garzarella wrote:
Move device properties used during the entire life cycle in a new
structure to simplify the copy of these fields during the vdpasim
initialization.

Signed-off-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>


It would be better to do it before patch 2.


---
  drivers/vdpa/vdpa_sim/vdpa_sim.h     | 17 ++++++++------
  drivers/vdpa/vdpa_sim/vdpa_sim.c     | 33 ++++++++++++++--------------
  drivers/vdpa/vdpa_sim/vdpa_sim_blk.c |  8 +++++--
  drivers/vdpa/vdpa_sim/vdpa_sim_net.c |  9 +++++---
  4 files changed, 38 insertions(+), 29 deletions(-)

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.h b/drivers/vdpa/vdpa_sim/vdpa_sim.h
index 6a1267c40d5e..76e642042eb0 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.h
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.h
@@ -40,12 +40,17 @@ struct vdpasim_virtqueue {
  	irqreturn_t (*cb)(void *data);
  };
+struct vdpasim_device {
+	u64 supported_features;
+	u32 id;
+	int nvqs;
+};
+
  struct vdpasim_init_attr {
-	u32		device_id;
-	u64		features;
+	struct vdpasim_device device;
+	int batch_mapping;
+
  	work_func_t	work_fn;
-	int		batch_mapping;
-	int		nvqs;
  };
/* State of each vdpasim device */
@@ -53,18 +58,16 @@ struct vdpasim {
  	struct vdpa_device vdpa;
  	struct vdpasim_virtqueue *vqs;
  	struct work_struct work;
+	struct vdpasim_device device;
  	/* spinlock to synchronize virtqueue state */
  	spinlock_t lock;
  	/* virtio config according to device type */
  	void *config;
  	struct vhost_iotlb *iommu;
  	void *buffer;
-	u32 device_id;
  	u32 status;
  	u32 generation;
  	u64 features;
-	u64 supported_features;
-	int nvqs;
  	/* spinlock to synchronize iommu table */
  	spinlock_t iommu_lock;
  };
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 9c9717441bbe..d053bd14b3f8 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -28,7 +28,7 @@ static void vdpasim_queue_ready(struct vdpasim *vdpasim, unsigned int idx)
  {
  	struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
- vringh_init_iotlb(&vq->vring, vdpasim->supported_features,
+	vringh_init_iotlb(&vq->vring, vdpasim->device.supported_features,
  			  VDPASIM_QUEUE_MAX, false,
  			  (struct vring_desc *)(uintptr_t)vq->desc_addr,
  			  (struct vring_avail *)
@@ -46,7 +46,7 @@ static void vdpasim_vq_reset(struct vdpasim *vdpasim,
  	vq->device_addr = 0;
  	vq->cb = NULL;
  	vq->private = NULL;
-	vringh_init_iotlb(&vq->vring, vdpasim->supported_features,
+	vringh_init_iotlb(&vq->vring, vdpasim->device.supported_features,
  			  VDPASIM_QUEUE_MAX, false, NULL, NULL, NULL);
  }
@@ -54,7 +54,7 @@ static void vdpasim_reset(struct vdpasim *vdpasim)
  {
  	int i;
- for (i = 0; i < vdpasim->nvqs; i++)
+	for (i = 0; i < vdpasim->device.nvqs; i++)
  		vdpasim_vq_reset(vdpasim, &vdpasim->vqs[i]);
spin_lock(&vdpasim->iommu_lock);
@@ -189,7 +189,7 @@ struct vdpasim *vdpasim_create(struct vdpasim_init_attr *attr)
  	struct device *dev;
  	int i, size, ret = -ENOMEM;
- device_id = attr->device_id;
+	device_id = attr->device.id;
  	/* Currently, we only accept the network and block devices. */
  	if (device_id != VIRTIO_ID_NET && device_id != VIRTIO_ID_BLOCK)
  		return ERR_PTR(-EOPNOTSUPP);
@@ -200,10 +200,12 @@ struct vdpasim *vdpasim_create(struct vdpasim_init_attr *attr)
  		ops = &vdpasim_config_ops;
vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops,
-				    attr->nvqs);
+				    attr->device.nvqs);
  	if (!vdpasim)
  		goto err_alloc;
+ vdpasim->device = attr->device;
+
  	if (device_id == VIRTIO_ID_NET)
  		size = sizeof(struct virtio_net_config);
  	else
@@ -212,14 +214,11 @@ struct vdpasim *vdpasim_create(struct vdpasim_init_attr *attr)
  	if (!vdpasim->config)
  		goto err_iommu;
- vdpasim->vqs = kcalloc(attr->nvqs, sizeof(struct vdpasim_virtqueue),
-			       GFP_KERNEL);
+	vdpasim->vqs = kcalloc(vdpasim->device.nvqs,
+			       sizeof(struct vdpasim_virtqueue), GFP_KERNEL);
  	if (!vdpasim->vqs)
  		goto err_iommu;
- vdpasim->device_id = device_id;
-	vdpasim->supported_features = attr->features;
-	vdpasim->nvqs = attr->nvqs;
  	INIT_WORK(&vdpasim->work, attr->work_fn);
  	spin_lock_init(&vdpasim->lock);
  	spin_lock_init(&vdpasim->iommu_lock);
@@ -238,7 +237,7 @@ struct vdpasim *vdpasim_create(struct vdpasim_init_attr *attr)
  	if (!vdpasim->buffer)
  		goto err_iommu;
- for (i = 0; i < vdpasim->nvqs; i++)
+	for (i = 0; i < vdpasim->device.nvqs; i++)
  		vringh_set_iotlb(&vdpasim->vqs[i].vring, vdpasim->iommu);
vdpasim->vdpa.dma_dev = dev;
@@ -347,7 +346,7 @@ static u64 vdpasim_get_features(struct vdpa_device *vdpa)
  {
  	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
- return vdpasim->supported_features;
+	return vdpasim->device.supported_features;
  }
static int vdpasim_set_features(struct vdpa_device *vdpa, u64 features)
@@ -358,14 +357,14 @@ static int vdpasim_set_features(struct vdpa_device *vdpa, u64 features)
  	if (!(features & (1ULL << VIRTIO_F_ACCESS_PLATFORM)))
  		return -EINVAL;
- vdpasim->features = features & vdpasim->supported_features;
+	vdpasim->features = features & vdpasim->device.supported_features;
/* We generally only know whether guest is using the legacy interface
  	 * here, so generally that's the earliest we can set config fields.
  	 * Note: We actually require VIRTIO_F_ACCESS_PLATFORM above which
  	 * implies VIRTIO_F_VERSION_1, but let's not try to be clever here.
  	 */
-	if (vdpasim->device_id == VIRTIO_ID_NET) {
+	if (vdpasim->device.id == VIRTIO_ID_NET) {
  		struct virtio_net_config *config =
  			(struct virtio_net_config *)vdpasim->config;
@@ -391,7 +390,7 @@ static u32 vdpasim_get_device_id(struct vdpa_device *vdpa)
  {
  	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
- return vdpasim->device_id;
+	return vdpasim->device.id;
  }
static u32 vdpasim_get_vendor_id(struct vdpa_device *vdpa)
@@ -427,10 +426,10 @@ static void vdpasim_get_config(struct vdpa_device *vdpa, unsigned int offset,
  {
  	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
- if (vdpasim->device_id == VIRTIO_ID_BLOCK &&
+	if (vdpasim->device.id == VIRTIO_ID_BLOCK &&
  	    (offset + len < sizeof(struct virtio_blk_config)))
  		memcpy(buf, vdpasim->config + offset, len);
-	else if (vdpasim->device_id == VIRTIO_ID_NET &&
+	else if (vdpasim->device.id == VIRTIO_ID_NET &&
  		 (offset + len < sizeof(struct virtio_net_config)))
  		memcpy(buf, vdpasim->config + offset, len);
  }
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
index 386dbb2f7138..363273d72e26 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
@@ -78,9 +78,13 @@ static int __init vdpasim_blk_init(void)
  	struct virtio_blk_config *config;
  	int ret;
- attr.device_id = VIRTIO_ID_BLOCK;
-	attr.features = VDPASIM_FEATURES | VDPASIM_BLK_FEATURES;
+	attr.device.id = VIRTIO_ID_BLOCK;
+	attr.device.supported_features = VDPASIM_FEATURES |
+					 VDPASIM_BLK_FEATURES;
+	attr.device.nvqs = VDPASIM_BLK_VQ_NUM;
+
  	attr.work_fn = vdpasim_blk_work;
+
  	vdpasim_blk_dev = vdpasim_create(&attr);
  	if (IS_ERR(vdpasim_blk_dev)) {
  		ret = PTR_ERR(vdpasim_blk_dev);
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
index e1e57c52b108..88c9569f6bd3 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
@@ -105,11 +105,14 @@ static int __init vdpasim_net_init(void)
  	struct virtio_net_config *config;
  	int ret;
- attr.device_id = VIRTIO_ID_NET;
-	attr.features = VDPASIM_FEATURES | VDPASIM_NET_FEATURES;
-	attr.nvqs = VDPASIM_NET_VQ_NUM;
+	attr.device.id = VIRTIO_ID_NET;
+	attr.device.supported_features = VDPASIM_FEATURES |
+					 VDPASIM_NET_FEATURES;
+	attr.device.nvqs = VDPASIM_NET_VQ_NUM;
+
  	attr.work_fn = vdpasim_net_work;
  	attr.batch_mapping = batch_mapping;
+


Unnecessary changes.

Thanks


  	vdpasim_net_dev = vdpasim_create(&attr);
  	if (IS_ERR(vdpasim_net_dev)) {
  		ret = PTR_ERR(vdpasim_net_dev);

_______________________________________________
Virtualization mailing list
Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linuxfoundation.org/mailman/listinfo/virtualization




[Index of Archives]     [KVM Development]     [Libvirt Development]     [Libvirt Users]     [CentOS Virtualization]     [Netdev]     [Ethernet Bridging]     [Linux Wireless]     [Kernel Newbies]     [Security]     [Linux for Hams]     [Netfilter]     [Bugtraq]     [Yosemite Forum]     [MIPS Linux]     [ARM Linux]     [Linux RAID]     [Linux Admin]     [Samba]

  Powered by Linux