From: Jason Wang <jasowang@redhat.com>
To: mst@redhat.com, jasowang@redhat.com,
virtualization@lists.linux-foundation.org,
linux-kernel@vger.kernel.org
Cc: rob.miller@broadcom.com, lingshan.zhu@intel.com,
eperezma@redhat.com, lulu@redhat.com, shahafs@mellanox.com,
hanand@xilinx.com, mhabets@solarflare.com, gdawar@xilinx.com,
saugatm@xilinx.com, vmireyno@marvell.com,
zhangweining@ruijie.com.cn, eli@mellanox.com
Subject: [PATCH 3/4] vdpa: get_iova_range() is mandatory for device specific DMA translation
Date: Wed, 17 Jun 2020 11:29:46 +0800 [thread overview]
Message-ID: <20200617032947.6371-4-jasowang@redhat.com> (raw)
In-Reply-To: <20200617032947.6371-1-jasowang@redhat.com>
In order to let userspace work correctly, get_iova_range() is a must
for the device that has its own DMA translation logic.
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/vdpa/vdpa.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index de211ef3738c..ab7af978ef70 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -82,6 +82,10 @@ struct vdpa_device *__vdpa_alloc_device(struct device *parent,
if (!!config->dma_map != !!config->dma_unmap)
goto err;
+ if ((config->dma_map || config->set_map) &&
+ !config->get_iova_range)
+ goto err;
+
err = -ENOMEM;
vdev = kzalloc(size, GFP_KERNEL);
if (!vdev)
--
2.20.1
next prev parent reply other threads:[~2020-06-17 3:30 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-17 3:29 [PATCH 0/4] vDPA: API for reporting IOVA range Jason Wang
2020-06-17 3:29 ` [PATCH 1/4] vdpa: introduce config op to get valid iova range Jason Wang
2020-08-05 12:51 ` Michael S. Tsirkin
2020-08-06 3:25 ` Jason Wang
2020-08-06 5:54 ` Michael S. Tsirkin
2020-08-06 12:03 ` Eli Cohen
2020-08-06 12:29 ` Michael S. Tsirkin
2020-08-06 12:43 ` Eli Cohen
2020-08-10 12:05 ` Michael S. Tsirkin
2020-08-11 2:53 ` Jason Wang
2020-08-11 8:29 ` Michael S. Tsirkin
2020-08-12 2:02 ` Jason Wang
2020-08-07 3:23 ` Jason Wang
2020-08-06 12:10 ` Eli Cohen
2020-08-07 3:04 ` Jason Wang
2020-06-17 3:29 ` [PATCH 2/4] vdpa_sim: implement get_iova_range bus operation Jason Wang
2020-06-17 3:29 ` Jason Wang [this message]
2020-08-05 12:55 ` [PATCH 3/4] vdpa: get_iova_range() is mandatory for device specific DMA translation Michael S. Tsirkin
2020-08-06 3:27 ` Jason Wang
2020-06-17 3:29 ` [PATCH 4/4] vhost: vdpa: report iova range Jason Wang
2020-08-05 12:58 ` Michael S. Tsirkin
2020-08-06 3:29 ` Jason Wang
2020-08-06 5:55 ` Michael S. Tsirkin
2020-10-21 14:45 ` [PATCH 0/4] vDPA: API for reporting IOVA range Michael S. Tsirkin
2020-10-22 5:47 ` Jason Wang
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