netdev - [RFC PATCH v2 07/19] vdpa: introduce config operations for associating ASID to a virtqueue group

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Message-ID: <20220224212314.1326-8-gdawar@xilinx.com>
Date:   Fri, 25 Feb 2022 02:52:47 +0530
From:   Gautam Dawar <gautam.dawar@...inx.com>
To:     unlisted-recipients:; (no To-header on input)
CC:     <gdawar@...inx.com>, <martinh@...inx.com>, <hanand@...inx.com>,
        <tanujk@...inx.com>, <eperezma@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Zhu Lingshan <lingshan.zhu@...el.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        Xie Yongji <xieyongji@...edance.com>,
        Eli Cohen <elic@...dia.com>,
        Si-Wei Liu <si-wei.liu@...cle.com>,
        Parav Pandit <parav@...dia.com>,
        Longpeng <longpeng2@...wei.com>,
        <virtualization@...ts.linux-foundation.org>,
        <linux-kernel@...r.kernel.org>, <kvm@...r.kernel.org>,
        <netdev@...r.kernel.org>
Subject: [RFC PATCH v2 07/19] vdpa: introduce config operations for associating ASID to a virtqueue group

This patch introduces a new bus operation to allow the vDPA bus driver
to associate an ASID to a virtqueue group.

Signed-off-by: Jason Wang <jasowang@...hat.com>
Signed-off-by: Gautam Dawar <gdawar@...inx.com>
---
 include/linux/vdpa.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index de22ca1a8ef3..7386860c3995 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -239,6 +239,12 @@ struct vdpa_map_file {
  *				@vdev: vdpa device
  *				Returns the iova range supported by
  *				the device.
+ * @set_group_asid:		Set address space identifier for a
+ *				virtqueue group
+ *				@vdev: vdpa device
+ *				@group: virtqueue group
+ *				@asid: address space id for this group
+ *				Returns integer: success (0) or error (< 0)
  * @set_map:			Set device memory mapping (optional)
  *				Needed for device that using device
  *				specific DMA translation (on-chip IOMMU)
@@ -321,6 +327,10 @@ struct vdpa_config_ops {
 		       u64 iova, u64 size, u64 pa, u32 perm, void *opaque);
 	int (*dma_unmap)(struct vdpa_device *vdev, unsigned int asid,
 			 u64 iova, u64 size);
+	int (*set_group_asid)(struct vdpa_device *vdev, unsigned int group,
+			      unsigned int asid);
+
+
 
 	/* Free device resources */
 	void (*free)(struct vdpa_device *vdev);
-- 
2.25.0