search for: virtio_mdev_queue_num_max

...t; > > +#define VIRTIO_MDEV_DRIVER_FEATURES_SEL 0x024 > > > + > > > +/* Queue selector - Write Only */ > > > +#define VIRTIO_MDEV_QUEUE_SEL 0x030 > > > + > > > +/* Maximum size of the currently selected queue - Read Only */ > > > +#define VIRTIO_MDEV_QUEUE_NUM_MAX 0x034 > > > + > > > +/* Queue size for the currently selected queue - Write Only */ > > > +#define VIRTIO_MDEV_QUEUE_NUM 0x038 > > > + > > > +/* Ready bit for the currently selected queue - Read Write */ > > > +#define VIRTIO_MDEV_QUEUE_READY...

...t; > > +#define VIRTIO_MDEV_DRIVER_FEATURES_SEL 0x024 > > > + > > > +/* Queue selector - Write Only */ > > > +#define VIRTIO_MDEV_QUEUE_SEL 0x030 > > > + > > > +/* Maximum size of the currently selected queue - Read Only */ > > > +#define VIRTIO_MDEV_QUEUE_NUM_MAX 0x034 > > > + > > > +/* Queue size for the currently selected queue - Write Only */ > > > +#define VIRTIO_MDEV_QUEUE_NUM 0x038 > > > + > > > +/* Ready bit for the currently selected queue - Read Write */ > > > +#define VIRTIO_MDEV_QUEUE_READY...

...ENT; > + goto error_available; > + } > + > + /* Allocate and fill out our active queue description */ > + info = kmalloc(sizeof(*info), GFP_KERNEL); > + if (!info) { > + err = -ENOMEM; > + goto error_kmalloc; > + } > + > + num = virtio_mdev_readl(vm_dev->mdev, VIRTIO_MDEV_QUEUE_NUM_MAX); > + if (num == 0) { > + err = -ENOENT; > + goto error_new_virtqueue; > + } > + > + /* Create the vring */ > + align = virtio_mdev_readl(vm_dev->mdev, VIRTIO_MDEV_QUEUE_ALIGN); > + vq = vring_create_virtqueue(index, num, align, vdev, > + true, true, ctx, >...

...ENT; > + goto error_available; > + } > + > + /* Allocate and fill out our active queue description */ > + info = kmalloc(sizeof(*info), GFP_KERNEL); > + if (!info) { > + err = -ENOMEM; > + goto error_kmalloc; > + } > + > + num = virtio_mdev_readl(vm_dev->mdev, VIRTIO_MDEV_QUEUE_NUM_MAX); > + if (num == 0) { > + err = -ENOENT; > + goto error_new_virtqueue; > + } > + > + /* Create the vring */ > + align = virtio_mdev_readl(vm_dev->mdev, VIRTIO_MDEV_QUEUE_ALIGN); > + vq = vring_create_virtqueue(index, num, align, vdev, > + true, true, ctx, >...

...d features set selector - Write Only */ >> +#define VIRTIO_MDEV_DRIVER_FEATURES_SEL 0x024 >> + >> +/* Queue selector - Write Only */ >> +#define VIRTIO_MDEV_QUEUE_SEL 0x030 >> + >> +/* Maximum size of the currently selected queue - Read Only */ >> +#define VIRTIO_MDEV_QUEUE_NUM_MAX 0x034 >> + >> +/* Queue size for the currently selected queue - Write Only */ >> +#define VIRTIO_MDEV_QUEUE_NUM 0x038 >> + >> +/* Ready bit for the currently selected queue - Read Write */ >> +#define VIRTIO_MDEV_QUEUE_READY 0x044 > Is this same as started?...

...020 > + > +/* Activated features set selector - Write Only */ > +#define VIRTIO_MDEV_DRIVER_FEATURES_SEL 0x024 > + > +/* Queue selector - Write Only */ > +#define VIRTIO_MDEV_QUEUE_SEL 0x030 > + > +/* Maximum size of the currently selected queue - Read Only */ > +#define VIRTIO_MDEV_QUEUE_NUM_MAX 0x034 > + > +/* Queue size for the currently selected queue - Write Only */ > +#define VIRTIO_MDEV_QUEUE_NUM 0x038 > + > +/* Ready bit for the currently selected queue - Read Write */ > +#define VIRTIO_MDEV_QUEUE_READY 0x044 > + > +/* Alignment of virtqueue - Read Only */...

...020 > + > +/* Activated features set selector - Write Only */ > +#define VIRTIO_MDEV_DRIVER_FEATURES_SEL 0x024 > + > +/* Queue selector - Write Only */ > +#define VIRTIO_MDEV_QUEUE_SEL 0x030 > + > +/* Maximum size of the currently selected queue - Read Only */ > +#define VIRTIO_MDEV_QUEUE_NUM_MAX 0x034 > + > +/* Queue size for the currently selected queue - Write Only */ > +#define VIRTIO_MDEV_QUEUE_NUM 0x038 > + > +/* Ready bit for the currently selected queue - Read Write */ > +#define VIRTIO_MDEV_QUEUE_READY 0x044 > + > +/* Alignment of virtqueue - Read Only */...

...+#define VIRTIO_MDEV_DRIVER_FEATURES_SEL 0x024 >>>> + >>>> +/* Queue selector - Write Only */ >>>> +#define VIRTIO_MDEV_QUEUE_SEL 0x030 >>>> + >>>> +/* Maximum size of the currently selected queue - Read Only */ >>>> +#define VIRTIO_MDEV_QUEUE_NUM_MAX 0x034 >>>> + >>>> +/* Queue size for the currently selected queue - Write Only */ >>>> +#define VIRTIO_MDEV_QUEUE_NUM 0x038 >>>> + >>>> +/* Ready bit for the currently selected queue - Read Write */ >>>> +#define VIRTIO_MDEV_Q...

...dev->mdev, VIRTIO_MDEV_QUEUE_READY)) { + err = -ENOENT; + goto error_available; + } + + /* Allocate and fill out our active queue description */ + info = kmalloc(sizeof(*info), GFP_KERNEL); + if (!info) { + err = -ENOMEM; + goto error_kmalloc; + } + + num = virtio_mdev_readl(vm_dev->mdev, VIRTIO_MDEV_QUEUE_NUM_MAX); + if (num == 0) { + err = -ENOENT; + goto error_new_virtqueue; + } + + /* Create the vring */ + align = virtio_mdev_readl(vm_dev->mdev, VIRTIO_MDEV_QUEUE_ALIGN); + vq = vring_create_virtqueue(index, num, align, vdev, + true, true, ctx, + virtio_mdev_notify, callback, name); + i...

...> > > > > + > > > > > +/* Queue selector - Write Only */ > > > > > +#define VIRTIO_MDEV_QUEUE_SEL 0x030 > > > > > + > > > > > +/* Maximum size of the currently selected queue - Read Only */ > > > > > +#define VIRTIO_MDEV_QUEUE_NUM_MAX 0x034 > > > > > + > > > > > +/* Queue size for the currently selected queue - Write Only */ > > > > > +#define VIRTIO_MDEV_QUEUE_NUM 0x038 > > > > > + > > > > > +/* Ready bit for the currently selected queue - Read Write */...

Hi all: There are hardware that can do virtio datapath offloading while having its own control path. This path tries to implement a mdev based unified API to support using kernel virtio driver to drive those devices. This is done by introducing a new mdev transport for virtio (virtio_mdev) and register itself as a new kind of mdev driver. Then it provides a unified way for kernel virtio driver to

...d features set selector - Write Only */ >> +#define VIRTIO_MDEV_DRIVER_FEATURES_SEL 0x024 >> + >> +/* Queue selector - Write Only */ >> +#define VIRTIO_MDEV_QUEUE_SEL 0x030 >> + >> +/* Maximum size of the currently selected queue - Read Only */ >> +#define VIRTIO_MDEV_QUEUE_NUM_MAX 0x034 >> + >> +/* Queue size for the currently selected queue - Write Only */ >> +#define VIRTIO_MDEV_QUEUE_NUM 0x038 >> + >> +/* Ready bit for the currently selected queue - Read Write */ >> +#define VIRTIO_MDEV_QUEUE_READY 0x044 >> + >> +/* Alignm...

...ev_writel(mdev, VIRTIO_MDEV_DEVICE_FEATURES_SEL, 0); + features |= virtio_mdev_readl(mdev, VIRTIO_MDEV_DEVICE_FEATURES); + + if (!(features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))) { + r = -EINVAL; + goto err_put_device; + } + + m->features = features; + + nvqs = virtio_mdev_readl(mdev, VIRTIO_MDEV_QUEUE_NUM_MAX); + m->nvqs = nvqs; + + m->vqs = kmalloc_array(nvqs, sizeof(struct vhost_virtqueue), + GFP_KERNEL); + if (!m->vqs) { + r = -ENOMEM; + goto err_put_device; + } + + vqs = kmalloc_array(nvqs, sizeof(*vqs), GFP_KERNEL); + if (!vqs) { + r = -ENOMEM; + goto err_free_vqs; + } + + dev...

...D; > + break; > + case VIRTIO_MDEV_VENDOR_ID: > + *val = MVNET_VENDOR_ID; > + break; > + case VIRTIO_MDEV_DEVICE_FEATURES: > + if (mvnet->device_features_sel) > + *val = mvnet_features >> 32; > + else > + *val = mvnet_features; > + break; > + case VIRTIO_MDEV_QUEUE_NUM_MAX: > + *val = MVNET_QUEUE_MAX; > + break; > + case VIRTIO_MDEV_QUEUE_READY: > + *val = vq->ready; > + break; > + case VIRTIO_MDEV_QUEUE_ALIGN: > + *val = MVNET_QUEUE_ALIGN; > + break; > + case VIRTIO_MDEV_STATUS: > + *val = mvnet->status; > + break; >...

...+ case VIRTIO_MDEV_DEVICE_ID: + *val = MVNET_DEVICE_ID; + break; + case VIRTIO_MDEV_VENDOR_ID: + *val = MVNET_VENDOR_ID; + break; + case VIRTIO_MDEV_DEVICE_FEATURES: + if (mvnet->device_features_sel) + *val = mvnet_features >> 32; + else + *val = mvnet_features; + break; + case VIRTIO_MDEV_QUEUE_NUM_MAX: + *val = MVNET_QUEUE_MAX; + break; + case VIRTIO_MDEV_QUEUE_READY: + *val = vq->ready; + break; + case VIRTIO_MDEV_QUEUE_ALIGN: + *val = MVNET_QUEUE_ALIGN; + break; + case VIRTIO_MDEV_STATUS: + *val = mvnet->status; + break; + case VIRTIO_MDEV_QUEUE_DESC_LOW: + *val = vq->desc_ad...

...); > + features |= virtio_mdev_readl(mdev, VIRTIO_MDEV_DEVICE_FEATURES); > + > + if (!(features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))) { > + r = -EINVAL; > + goto err_put_device; > + } > + > + m->features = features; > + > + nvqs = virtio_mdev_readl(mdev, VIRTIO_MDEV_QUEUE_NUM_MAX); > + m->nvqs = nvqs; > + > + m->vqs = kmalloc_array(nvqs, sizeof(struct vhost_virtqueue), > + GFP_KERNEL); > + if (!m->vqs) { > + r = -ENOMEM; > + goto err_put_device; > + } > + > + vqs = kmalloc_array(nvqs, sizeof(*vqs), GFP_KERNEL); > + if (!v...

This RFC is to demonstrate below ideas, a) Build vhost-mdev on top of the same abstraction defined in the virtio-mdev series [1]; b) Introduce /dev/vhost-mdev to do vhost ioctls and support setting mdev device as backend; Now the userspace API looks like this: - Userspace generates a compatible mdev device; - Userspace opens this mdev device with VFIO API (including doing IOMMU

This RFC is to demonstrate below ideas, a) Build vhost-mdev on top of the same abstraction defined in the virtio-mdev series [1]; b) Introduce /dev/vhost-mdev to do vhost ioctls and support setting mdev device as backend; Now the userspace API looks like this: - Userspace generates a compatible mdev device; - Userspace opens this mdev device with VFIO API (including doing IOMMU