From: Jason Wang <jasowang@redhat.com>
To: mst@redhat.com, jasowang@redhat.com
Cc: gdawar@amd.com, elic@nvidia.com,
virtualization@lists.linux-foundation.org, tanuj.kamde@amd.com,
linux-kernel@vger.kernel.org
Subject: [PATCH V2 4/5] vdpa: set dma mask for vDPA device
Date: Thu, 19 Jan 2023 14:15:24 +0800 [thread overview]
Message-ID: <20230119061525.75068-5-jasowang@redhat.com> (raw)
In-Reply-To: <20230119061525.75068-1-jasowang@redhat.com>
Setting DMA mask for vDPA device in case that there are virtqueue that
is not backed by DMA so the vDPA device could be advertised as the DMA
device that is used by DMA API for software emulated virtqueues.
Reviewed-by: Eli Cohen <elic@nvidia.com>
Tested-by: Eli Cohen <elic@nvidia.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/vdpa/vdpa.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index 8ef7aa1365cc..6821b2850bbb 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -39,6 +39,11 @@ static int vdpa_dev_probe(struct device *d)
u32 max_num, min_num = 1;
int ret = 0;
+ d->dma_mask = &d->coherent_dma_mask;
+ ret = dma_set_mask_and_coherent(d, DMA_BIT_MASK(64));
+ if (ret)
+ return ret;
+
max_num = ops->get_vq_num_max(vdev);
if (ops->get_vq_num_min)
min_num = ops->get_vq_num_min(vdev);
--
2.25.1
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next prev parent reply other threads:[~2023-01-19 6:15 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-19 6:15 [PATCH V2 0/5] virtio_ring: per virtqueue DMA device Jason Wang
2023-01-19 6:15 ` [PATCH V2 1/5] virtio_ring: per virtqueue dma device Jason Wang
2023-01-19 6:15 ` [PATCH V2 2/5] vdpa: introduce get_vq_dma_device() Jason Wang
2023-01-19 6:15 ` [PATCH V2 3/5] virtio-vdpa: support per vq dma device Jason Wang
2023-01-19 6:15 ` Jason Wang [this message]
2023-01-19 6:15 ` [PATCH V2 5/5] vdpa: mlx5: support per virtqueue " Jason Wang
2023-02-03 9:33 ` Michael S. Tsirkin
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