From: Eli Cohen <elic@nvidia.com>
To: <mst@redhat.com>, <jasowang@redhat.com>
Cc: <virtualization@lists.linux-foundation.org>,
<linux-kernel@vger.kernel.org>, <elic@nvidia.com>
Subject: [PATCH] vdpa/mlx5: Add support for doorbell bypassing
Date: Wed, 21 Apr 2021 13:41:45 +0300 [thread overview]
Message-ID: <20210421104145.115907-1-elic@nvidia.com> (raw)
Implement mlx5_get_vq_notification() to return the doorbell address.
Size is set to one system page as required.
Signed-off-by: Eli Cohen <elic@nvidia.com>
---
drivers/vdpa/mlx5/core/mlx5_vdpa.h | 1 +
drivers/vdpa/mlx5/core/resources.c | 1 +
drivers/vdpa/mlx5/net/mlx5_vnet.c | 6 ++++++
3 files changed, 8 insertions(+)
diff --git a/drivers/vdpa/mlx5/core/mlx5_vdpa.h b/drivers/vdpa/mlx5/core/mlx5_vdpa.h
index b6cc53ba980c..49de62cda598 100644
--- a/drivers/vdpa/mlx5/core/mlx5_vdpa.h
+++ b/drivers/vdpa/mlx5/core/mlx5_vdpa.h
@@ -41,6 +41,7 @@ struct mlx5_vdpa_resources {
u32 pdn;
struct mlx5_uars_page *uar;
void __iomem *kick_addr;
+ u64 phys_kick_addr;
u16 uid;
u32 null_mkey;
bool valid;
diff --git a/drivers/vdpa/mlx5/core/resources.c b/drivers/vdpa/mlx5/core/resources.c
index 6521cbd0f5c2..665f8fc1710f 100644
--- a/drivers/vdpa/mlx5/core/resources.c
+++ b/drivers/vdpa/mlx5/core/resources.c
@@ -247,6 +247,7 @@ int mlx5_vdpa_alloc_resources(struct mlx5_vdpa_dev *mvdev)
goto err_key;
kick_addr = mdev->bar_addr + offset;
+ res->phys_kick_addr = kick_addr;
res->kick_addr = ioremap(kick_addr, PAGE_SIZE);
if (!res->kick_addr) {
diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 10c5fef3c020..680751074d2a 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -1865,8 +1865,14 @@ static void mlx5_vdpa_free(struct vdpa_device *vdev)
static struct vdpa_notification_area mlx5_get_vq_notification(struct vdpa_device *vdev, u16 idx)
{
+ struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
struct vdpa_notification_area ret = {};
+ struct mlx5_vdpa_net *ndev;
+
+ ndev = to_mlx5_vdpa_ndev(mvdev);
+ ret.addr = (phys_addr_t)ndev->mvdev.res.phys_kick_addr;
+ ret.size = PAGE_SIZE;
return ret;
}
--
2.30.1
next reply other threads:[~2021-04-21 10:42 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-21 10:41 Eli Cohen [this message]
2021-04-22 2:37 ` [PATCH] vdpa/mlx5: Add support for doorbell bypassing Jason Wang
2021-04-22 3:27 ` Mika Penttilä
2021-04-22 4:52 ` Jason Wang
2021-04-22 6:03 ` Eli Cohen
2021-04-22 8:07 ` Eli Cohen
2021-04-22 8:21 ` Jason Wang
2021-04-22 8:39 ` Eli Cohen
2021-04-22 8:59 ` Jason Wang
2021-04-25 13:25 ` Eli Cohen
2021-04-26 2:35 ` Jason Wang
2021-04-28 20:53 ` Si-Wei Liu
2021-04-29 2:43 ` Jason Wang
2021-04-29 10:00 ` Eli Cohen
2021-04-30 4:40 ` Jason Wang
2021-04-30 6:31 ` Zhu, Lingshan
2021-04-30 7:03 ` Jason Wang
2021-04-30 9:25 ` Zhu, Lingshan
2021-04-30 13:49 ` Jason Wang
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