From: Jason Wang <jasowang@redhat.com>
To: mst@redhat.com, jasowang@redhat.com, kvm@vger.kernel.org,
virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, kwankhede@nvidia.com,
alex.williamson@redhat.com, cohuck@redhat.com,
tiwei.bie@intel.com, maxime.coquelin@redhat.com,
cunming.liang@intel.com, zhihong.wang@intel.com,
rob.miller@broadcom.com, idos@mellanox.com,
xiao.w.wang@intel.com, haotian.wang@sifive.com
Subject: [RFC PATCH 2/4] mdev: introduce helper to set per device dma ops
Date: Tue, 10 Sep 2019 16:19:33 +0800 [thread overview]
Message-ID: <20190910081935.30516-3-jasowang@redhat.com> (raw)
In-Reply-To: <20190910081935.30516-1-jasowang@redhat.com>
This patch introduces mdev_set_dma_ops() which allows parent to set
per device DMA ops. This help for the kernel driver to setup a correct
DMA mappings.
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/vfio/mdev/mdev_core.c | 7 +++++++
include/linux/mdev.h | 2 ++
2 files changed, 9 insertions(+)
diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
index b558d4cfd082..eb28552082d7 100644
--- a/drivers/vfio/mdev/mdev_core.c
+++ b/drivers/vfio/mdev/mdev_core.c
@@ -13,6 +13,7 @@
#include <linux/uuid.h>
#include <linux/sysfs.h>
#include <linux/mdev.h>
+#include <linux/dma-mapping.h>
#include "mdev_private.h"
@@ -27,6 +28,12 @@ static struct class_compat *mdev_bus_compat_class;
static LIST_HEAD(mdev_list);
static DEFINE_MUTEX(mdev_list_lock);
+void mdev_set_dma_ops(struct mdev_device *mdev, struct dma_map_ops *ops)
+{
+ set_dma_ops(&mdev->dev, ops);
+}
+EXPORT_SYMBOL(mdev_set_dma_ops);
+
struct device *mdev_parent_dev(struct mdev_device *mdev)
{
return mdev->parent->dev;
diff --git a/include/linux/mdev.h b/include/linux/mdev.h
index 0ce30ca78db0..7195f40bf8bf 100644
--- a/include/linux/mdev.h
+++ b/include/linux/mdev.h
@@ -145,4 +145,6 @@ struct device *mdev_parent_dev(struct mdev_device *mdev);
struct device *mdev_dev(struct mdev_device *mdev);
struct mdev_device *mdev_from_dev(struct device *dev);
+void mdev_set_dma_ops(struct mdev_device *mdev, struct dma_map_ops *ops);
+
#endif /* MDEV_H */
--
2.19.1
next prev parent reply other threads:[~2019-09-10 8:20 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-10 8:19 [RFC PATCH 0/4] mdev based hardware virtio offloading support Jason Wang
2019-09-10 8:19 ` [RFC PATCH 1/4] vringh: fix copy direction of vringh_iov_push_kern() Jason Wang
2019-09-10 8:19 ` Jason Wang [this message]
2019-09-17 19:00 ` [RFC PATCH 2/4] mdev: introduce helper to set per device dma ops Alex Williamson
2019-09-18 5:58 ` Jason Wang
2019-09-10 8:19 ` [RFC PATCH 3/4] virtio: introudce a mdev based transport Jason Wang
2019-09-10 10:01 ` Michael S. Tsirkin
2019-09-10 13:13 ` Jason Wang
2019-09-10 13:52 ` Michael S. Tsirkin
2019-09-11 2:38 ` Jason Wang
2019-09-11 9:36 ` Michael S. Tsirkin
2019-09-11 9:53 ` Jason Wang
2019-09-11 1:47 ` Tiwei Bie
2019-09-11 2:52 ` Jason Wang
2019-09-11 3:08 ` Tiwei Bie
2019-09-10 8:19 ` [RFC PATCH 4/4] docs: Sample driver to demonstrate how to implement virtio-mdev framework Jason Wang
2019-09-10 10:15 ` Michael S. Tsirkin
2019-09-10 13:22 ` Jason Wang
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