diff options
Diffstat (limited to 'drivers/misc/mic/vop')
| -rw-r--r-- | drivers/misc/mic/vop/Makefile | 2 | ||||
| -rw-r--r-- | drivers/misc/mic/vop/vop_main.c | 3 | ||||
| -rw-r--r-- | drivers/misc/mic/vop/vop_vringh.c | 24 |
3 files changed, 19 insertions, 10 deletions
diff --git a/drivers/misc/mic/vop/Makefile b/drivers/misc/mic/vop/Makefile index 579da3868c8e..51b9b0022786 100644 --- a/drivers/misc/mic/vop/Makefile +++ b/drivers/misc/mic/vop/Makefile @@ -3,7 +3,7 @@ # Makefile - Intel MIC Linux driver. # Copyright(c) 2016, Intel Corporation. # -obj-m := vop.o +obj-$(CONFIG_VOP) := vop.o vop-objs += vop_main.o vop-objs += vop_debugfs.o diff --git a/drivers/misc/mic/vop/vop_main.c b/drivers/misc/mic/vop/vop_main.c index 55e7f21e51f4..714b94f42d38 100644 --- a/drivers/misc/mic/vop/vop_main.c +++ b/drivers/misc/mic/vop/vop_main.c @@ -124,6 +124,7 @@ static void vop_transport_features(struct virtio_device *vdev) * creates virtio rings on preallocated memory. */ __virtio_clear_bit(vdev, VIRTIO_F_RING_PACKED); + __virtio_set_bit(vdev, VIRTIO_F_ACCESS_PLATFORM); } static int vop_finalize_features(struct virtio_device *vdev) @@ -320,7 +321,7 @@ static struct virtqueue *vop_find_vq(struct virtio_device *dev, /* First assign the vring's allocated in host memory */ vqconfig = _vop_vq_config(vdev->desc) + index; memcpy_fromio(&config, vqconfig, sizeof(config)); - _vr_size = vring_size(le16_to_cpu(config.num), MIC_VIRTIO_RING_ALIGN); + _vr_size = round_up(vring_size(le16_to_cpu(config.num), MIC_VIRTIO_RING_ALIGN), 4); vr_size = PAGE_ALIGN(_vr_size + sizeof(struct _mic_vring_info)); va = vpdev->hw_ops->remap(vpdev, le64_to_cpu(config.address), vr_size); if (!va) diff --git a/drivers/misc/mic/vop/vop_vringh.c b/drivers/misc/mic/vop/vop_vringh.c index 30eac172f017..7014ffe88632 100644 --- a/drivers/misc/mic/vop/vop_vringh.c +++ b/drivers/misc/mic/vop/vop_vringh.c @@ -296,7 +296,7 @@ static int vop_virtio_add_device(struct vop_vdev *vdev, num = le16_to_cpu(vqconfig[i].num); mutex_init(&vvr->vr_mutex); - vr_size = PAGE_ALIGN(vring_size(num, MIC_VIRTIO_RING_ALIGN) + + vr_size = PAGE_ALIGN(round_up(vring_size(num, MIC_VIRTIO_RING_ALIGN), 4) + sizeof(struct _mic_vring_info)); vr->va = (void *) __get_free_pages(GFP_KERNEL | __GFP_ZERO, @@ -308,7 +308,7 @@ static int vop_virtio_add_device(struct vop_vdev *vdev, goto err; } vr->len = vr_size; - vr->info = vr->va + vring_size(num, MIC_VIRTIO_RING_ALIGN); + vr->info = vr->va + round_up(vring_size(num, MIC_VIRTIO_RING_ALIGN), 4); vr->info->magic = cpu_to_le32(MIC_MAGIC + vdev->virtio_id + i); vr_addr = dma_map_single(&vpdev->dev, vr->va, vr_size, DMA_BIDIRECTIONAL); @@ -602,6 +602,7 @@ static int vop_virtio_copy_from_user(struct vop_vdev *vdev, void __user *ubuf, size_t partlen; bool dma = VOP_USE_DMA && vi->dma_ch; int err = 0; + size_t offset = 0; if (dma) { dma_alignment = 1 << vi->dma_ch->device->copy_align; @@ -655,13 +656,20 @@ memcpy: * We are copying to IO below and should ideally use something * like copy_from_user_toio(..) if it existed. */ - if (copy_from_user((void __force *)dbuf, ubuf, len)) { - err = -EFAULT; - dev_err(vop_dev(vdev), "%s %d err %d\n", - __func__, __LINE__, err); - goto err; + while (len) { + partlen = min_t(size_t, len, VOP_INT_DMA_BUF_SIZE); + + if (copy_from_user(vvr->buf, ubuf + offset, partlen)) { + err = -EFAULT; + dev_err(vop_dev(vdev), "%s %d err %d\n", + __func__, __LINE__, err); + goto err; + } + memcpy_toio(dbuf + offset, vvr->buf, partlen); + offset += partlen; + vdev->out_bytes += partlen; + len -= partlen; } - vdev->out_bytes += len; err = 0; err: vpdev->hw_ops->unmap(vpdev, dbuf); |