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From: Xie Yongji <xieyongji@bytedance.com>
To: mst@redhat.com, jasowang@redhat.com, stefanha@redhat.com,
	sgarzare@redhat.com, parav@nvidia.com, akpm@linux-foundation.org,
	rdunlap@infradead.org, willy@infradead.org,
	viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org,
	corbet@lwn.net
Cc: virtualization@lists.linux-foundation.org,
	netdev@vger.kernel.org, kvm@vger.kernel.org, linux-aio@kvack.org,
	linux-fsdevel@vger.kernel.org, linux-mm@kvack.org
Subject: [RFC v2 08/13] vdpa: Introduce process_iotlb_msg() in vdpa_config_ops
Date: Tue, 22 Dec 2020 22:52:16 +0800	[thread overview]
Message-ID: <20201222145221.711-9-xieyongji@bytedance.com> (raw)
In-Reply-To: <20201222145221.711-1-xieyongji@bytedance.com>

This patch introduces a new method in the vdpa_config_ops to
support processing the raw vhost memory mapping message in the
vDPA device driver.

Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
---
 drivers/vhost/vdpa.c | 5 ++++-
 include/linux/vdpa.h | 7 +++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 448be7875b6d..ccbb391e38be 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -728,6 +728,9 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev,
 	if (r)
 		return r;
 
+	if (ops->process_iotlb_msg)
+		return ops->process_iotlb_msg(vdpa, msg);
+
 	switch (msg->type) {
 	case VHOST_IOTLB_UPDATE:
 		r = vhost_vdpa_process_iotlb_update(v, msg);
@@ -770,7 +773,7 @@ static int vhost_vdpa_alloc_domain(struct vhost_vdpa *v)
 	int ret;
 
 	/* Device want to do DMA by itself */
-	if (ops->set_map || ops->dma_map)
+	if (ops->set_map || ops->dma_map || ops->process_iotlb_msg)
 		return 0;
 
 	bus = dma_dev->bus;
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 656fe264234e..7bccedf22f4b 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -5,6 +5,7 @@
 #include <linux/kernel.h>
 #include <linux/device.h>
 #include <linux/interrupt.h>
+#include <linux/vhost_types.h>
 #include <linux/vhost_iotlb.h>
 #include <net/genetlink.h>
 
@@ -172,6 +173,10 @@ struct vdpa_iova_range {
  *				@vdev: vdpa device
  *				Returns the iova range supported by
  *				the device.
+ * @process_iotlb_msg:		Process vhost memory mapping message (optional)
+ *				Only used for VDUSE device now
+ *				@vdev: vdpa device
+ *				@msg: vhost memory mapping message
  * @set_map:			Set device memory mapping (optional)
  *				Needed for device that using device
  *				specific DMA translation (on-chip IOMMU)
@@ -240,6 +245,8 @@ struct vdpa_config_ops {
 	struct vdpa_iova_range (*get_iova_range)(struct vdpa_device *vdev);
 
 	/* DMA ops */
+	int (*process_iotlb_msg)(struct vdpa_device *vdev,
+				 struct vhost_iotlb_msg *msg);
 	int (*set_map)(struct vdpa_device *vdev, struct vhost_iotlb *iotlb);
 	int (*dma_map)(struct vdpa_device *vdev, u64 iova, u64 size,
 		       u64 pa, u32 perm);
-- 
2.11.0



  parent reply	other threads:[~2020-12-22 14:54 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-22 14:52 [RFC v2 00/13] Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2020-12-22 14:52 ` [RFC v2 01/13] mm: export zap_page_range() for driver use Xie Yongji
2020-12-22 15:44   ` Christoph Hellwig
2020-12-22 14:52 ` [RFC v2 02/13] eventfd: track eventfd_signal() recursion depth separately in different cases Xie Yongji
2020-12-22 14:52 ` [RFC v2 03/13] eventfd: Increase the recursion depth of eventfd_signal() Xie Yongji
2020-12-22 14:52 ` [RFC v2 04/13] vdpa: Remove the restriction that only supports virtio-net devices Xie Yongji
2020-12-22 14:52 ` [RFC v2 05/13] vdpa: Pass the netlink attributes to ops.dev_add() Xie Yongji
2020-12-22 14:52 ` [RFC v2 06/13] vduse: Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2020-12-23  8:08   ` Jason Wang
2020-12-23 14:17     ` Yongji Xie
2020-12-24  3:01       ` Jason Wang
2020-12-24  8:34         ` Yongji Xie
2020-12-25  6:59           ` Jason Wang
2021-01-08 13:32   ` Bob Liu
2021-01-10 10:03     ` Yongji Xie
2020-12-22 14:52 ` [RFC v2 07/13] vduse: support get/set virtqueue state Xie Yongji
2020-12-22 14:52 ` Xie Yongji [this message]
2020-12-23  8:36   ` [RFC v2 08/13] vdpa: Introduce process_iotlb_msg() in vdpa_config_ops Jason Wang
2020-12-23 11:06     ` Yongji Xie
2020-12-24  2:36       ` Jason Wang
2020-12-24  7:24         ` Yongji Xie
2020-12-22 14:52 ` [RFC v2 09/13] vduse: Add support for processing vhost iotlb message Xie Yongji
2020-12-23  9:05   ` Jason Wang
2020-12-23 12:14     ` [External] " Yongji Xie
2020-12-24  2:41       ` Jason Wang
2020-12-24  7:37         ` Yongji Xie
2020-12-25  2:37           ` Yongji Xie
2020-12-25  7:02             ` Jason Wang
2020-12-25 11:36               ` Yongji Xie
2020-12-25  6:57           ` Jason Wang
2020-12-25 10:31             ` Yongji Xie
2020-12-28  7:43               ` Jason Wang
2020-12-28  8:14                 ` Yongji Xie
2020-12-28  8:43                   ` Jason Wang
2020-12-28  9:12                     ` Yongji Xie
2020-12-29  9:11                       ` Jason Wang
2020-12-29 10:26                         ` Yongji Xie
2020-12-30  6:10                           ` Jason Wang
2020-12-30  7:09                             ` Yongji Xie
2020-12-30  8:41                               ` Jason Wang
2020-12-30 10:12                                 ` Yongji Xie
2020-12-31  2:49                                   ` Jason Wang
2020-12-31  5:15                                     ` Yongji Xie
2020-12-31  5:49                                       ` Jason Wang
2020-12-31  6:52                                         ` Yongji Xie
2020-12-31  7:11                                           ` Jason Wang
2020-12-31  8:00                                             ` Yongji Xie
2020-12-22 14:52 ` [RFC v2 10/13] vduse: grab the module's references until there is no vduse device Xie Yongji
2020-12-22 14:52 ` [RFC v2 11/13] vduse/iova_domain: Support reclaiming bounce pages Xie Yongji
2020-12-22 14:52 ` [RFC v2 12/13] vduse: Add memory shrinker to reclaim " Xie Yongji
2020-12-22 14:52 ` [RFC v2 13/13] vduse: Introduce a workqueue for irq injection Xie Yongji
2020-12-23  6:38 ` [RFC v2 00/13] Introduce VDUSE - vDPA Device in Userspace Jason Wang
2020-12-23  8:14   ` Jason Wang
2020-12-23 10:59   ` Yongji Xie
2020-12-24  2:24     ` Jason Wang

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