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From: Stefan Hajnoczi <stefanha@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Fam Zheng" <fam@euphon.net>,
	"Stefan Hajnoczi" <stefanha@redhat.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	"Stefano Stabellini" <sstabellini@kernel.org>,
	qemu-block@nongnu.org, "Juan Quintela" <quintela@redhat.com>,
	"Paul Durrant" <paul@xen.org>,
	"Anthony Perard" <anthony.perard@citrix.com>,
	xen-devel@lists.xenproject.org,
	"Philippe Mathieu-Daudé" <philmd@redhat.com>,
	"Stefano Garzarella" <sgarzare@redhat.com>,
	"Peter Lieven" <pl@kamp.de>, "Stefan Weil" <sw@weilnetz.de>,
	"Julia Suvorova" <jusual@redhat.com>,
	"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
	"Ronnie Sahlberg" <ronniesahlberg@gmail.com>,
	"Aarushi Mehta" <mehta.aaru20@gmail.com>,
	"Kevin Wolf" <kwolf@redhat.com>,
	"Daniel P. Berrangé" <berrange@redhat.com>,
	"Richard W.M. Jones" <rjones@redhat.com>,
	"Coiby Xu" <Coiby.Xu@gmail.com>,
	"Hanna Reitz" <hreitz@redhat.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>
Subject: [PATCH v3 6/6] virtio: unify dataplane and non-dataplane ->handle_output()
Date: Tue,  7 Dec 2021 13:23:36 +0000	[thread overview]
Message-ID: <20211207132336.36627-7-stefanha@redhat.com> (raw)
In-Reply-To: <20211207132336.36627-1-stefanha@redhat.com>

Now that virtio-blk and virtio-scsi are ready, get rid of
the handle_aio_output() callback. It's no longer needed.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 include/hw/virtio/virtio.h      |  4 +--
 hw/block/dataplane/virtio-blk.c | 16 ++--------
 hw/scsi/virtio-scsi-dataplane.c | 54 ++++-----------------------------
 hw/virtio/virtio.c              | 32 +++++++++----------
 4 files changed, 26 insertions(+), 80 deletions(-)

diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index b90095628f..f095637058 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -316,8 +316,8 @@ bool virtio_device_ioeventfd_enabled(VirtIODevice *vdev);
 EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq);
 void virtio_queue_set_host_notifier_enabled(VirtQueue *vq, bool enabled);
 void virtio_queue_host_notifier_read(EventNotifier *n);
-void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx,
-        VirtIOHandleOutput handle_output);
+void virtio_queue_aio_attach_host_notifier(VirtQueue *vq, AioContext *ctx);
+void virtio_queue_aio_detach_host_notifier(VirtQueue *vq, AioContext *ctx);
 VirtQueue *virtio_vector_first_queue(VirtIODevice *vdev, uint16_t vector);
 VirtQueue *virtio_vector_next_queue(VirtQueue *vq);
 
diff --git a/hw/block/dataplane/virtio-blk.c b/hw/block/dataplane/virtio-blk.c
index a2fa407b98..49276e46f2 100644
--- a/hw/block/dataplane/virtio-blk.c
+++ b/hw/block/dataplane/virtio-blk.c
@@ -154,17 +154,6 @@ void virtio_blk_data_plane_destroy(VirtIOBlockDataPlane *s)
     g_free(s);
 }
 
-static void virtio_blk_data_plane_handle_output(VirtIODevice *vdev,
-                                                VirtQueue *vq)
-{
-    VirtIOBlock *s = (VirtIOBlock *)vdev;
-
-    assert(s->dataplane);
-    assert(s->dataplane_started);
-
-    virtio_blk_handle_vq(s, vq);
-}
-
 /* Context: QEMU global mutex held */
 int virtio_blk_data_plane_start(VirtIODevice *vdev)
 {
@@ -258,8 +247,7 @@ int virtio_blk_data_plane_start(VirtIODevice *vdev)
     for (i = 0; i < nvqs; i++) {
         VirtQueue *vq = virtio_get_queue(s->vdev, i);
 
-        virtio_queue_aio_set_host_notifier_handler(vq, s->ctx,
-                virtio_blk_data_plane_handle_output);
+        virtio_queue_aio_attach_host_notifier(vq, s->ctx);
     }
     aio_context_release(s->ctx);
     return 0;
@@ -302,7 +290,7 @@ static void virtio_blk_data_plane_stop_bh(void *opaque)
     for (i = 0; i < s->conf->num_queues; i++) {
         VirtQueue *vq = virtio_get_queue(s->vdev, i);
 
-        virtio_queue_aio_set_host_notifier_handler(vq, s->ctx, NULL);
+        virtio_queue_aio_detach_host_notifier(vq, s->ctx);
     }
 }
 
diff --git a/hw/scsi/virtio-scsi-dataplane.c b/hw/scsi/virtio-scsi-dataplane.c
index 76137de67f..29575cbaf6 100644
--- a/hw/scsi/virtio-scsi-dataplane.c
+++ b/hw/scsi/virtio-scsi-dataplane.c
@@ -49,45 +49,6 @@ void virtio_scsi_dataplane_setup(VirtIOSCSI *s, Error **errp)
     }
 }
 
-static void virtio_scsi_data_plane_handle_cmd(VirtIODevice *vdev,
-                                              VirtQueue *vq)
-{
-    VirtIOSCSI *s = VIRTIO_SCSI(vdev);
-
-    virtio_scsi_acquire(s);
-    if (!s->dataplane_fenced) {
-        assert(s->ctx && s->dataplane_started);
-        virtio_scsi_handle_cmd_vq(s, vq);
-    }
-    virtio_scsi_release(s);
-}
-
-static void virtio_scsi_data_plane_handle_ctrl(VirtIODevice *vdev,
-                                               VirtQueue *vq)
-{
-    VirtIOSCSI *s = VIRTIO_SCSI(vdev);
-
-    virtio_scsi_acquire(s);
-    if (!s->dataplane_fenced) {
-        assert(s->ctx && s->dataplane_started);
-        virtio_scsi_handle_ctrl_vq(s, vq);
-    }
-    virtio_scsi_release(s);
-}
-
-static void virtio_scsi_data_plane_handle_event(VirtIODevice *vdev,
-                                                VirtQueue *vq)
-{
-    VirtIOSCSI *s = VIRTIO_SCSI(vdev);
-
-    virtio_scsi_acquire(s);
-    if (!s->dataplane_fenced) {
-        assert(s->ctx && s->dataplane_started);
-        virtio_scsi_handle_event_vq(s, vq);
-    }
-    virtio_scsi_release(s);
-}
-
 static int virtio_scsi_set_host_notifier(VirtIOSCSI *s, VirtQueue *vq, int n)
 {
     BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(s)));
@@ -112,10 +73,10 @@ static void virtio_scsi_dataplane_stop_bh(void *opaque)
     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
     int i;
 
-    virtio_queue_aio_set_host_notifier_handler(vs->ctrl_vq, s->ctx, NULL);
-    virtio_queue_aio_set_host_notifier_handler(vs->event_vq, s->ctx, NULL);
+    virtio_queue_aio_detach_host_notifier(vs->ctrl_vq, s->ctx);
+    virtio_queue_aio_detach_host_notifier(vs->event_vq, s->ctx);
     for (i = 0; i < vs->conf.num_queues; i++) {
-        virtio_queue_aio_set_host_notifier_handler(vs->cmd_vqs[i], s->ctx, NULL);
+        virtio_queue_aio_detach_host_notifier(vs->cmd_vqs[i], s->ctx);
     }
 }
 
@@ -176,14 +137,11 @@ int virtio_scsi_dataplane_start(VirtIODevice *vdev)
     memory_region_transaction_commit();
 
     aio_context_acquire(s->ctx);
-    virtio_queue_aio_set_host_notifier_handler(vs->ctrl_vq, s->ctx,
-                                            virtio_scsi_data_plane_handle_ctrl);
-    virtio_queue_aio_set_host_notifier_handler(vs->event_vq, s->ctx,
-                                           virtio_scsi_data_plane_handle_event);
+    virtio_queue_aio_attach_host_notifier(vs->ctrl_vq, s->ctx);
+    virtio_queue_aio_attach_host_notifier(vs->event_vq, s->ctx);
 
     for (i = 0; i < vs->conf.num_queues; i++) {
-        virtio_queue_aio_set_host_notifier_handler(vs->cmd_vqs[i], s->ctx,
-                                             virtio_scsi_data_plane_handle_cmd);
+        virtio_queue_aio_attach_host_notifier(vs->cmd_vqs[i], s->ctx);
     }
 
     s->dataplane_starting = false;
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index a97a406d3c..ce182a4e57 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -3522,23 +3522,23 @@ static void virtio_queue_host_notifier_aio_poll_end(EventNotifier *n)
     virtio_queue_set_notification(vq, 1);
 }
 
-void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx,
-        VirtIOHandleOutput handle_output)
+void virtio_queue_aio_attach_host_notifier(VirtQueue *vq, AioContext *ctx)
 {
-    if (handle_output) {
-        aio_set_event_notifier(ctx, &vq->host_notifier, true,
-                               virtio_queue_host_notifier_read,
-                               virtio_queue_host_notifier_aio_poll,
-                               virtio_queue_host_notifier_aio_poll_ready);
-        aio_set_event_notifier_poll(ctx, &vq->host_notifier,
-                                    virtio_queue_host_notifier_aio_poll_begin,
-                                    virtio_queue_host_notifier_aio_poll_end);
-    } else {
-        aio_set_event_notifier(ctx, &vq->host_notifier, true, NULL, NULL, NULL);
-        /* Test and clear notifier before after disabling event,
-         * in case poll callback didn't have time to run. */
-        virtio_queue_host_notifier_read(&vq->host_notifier);
-    }
+    aio_set_event_notifier(ctx, &vq->host_notifier, true,
+                           virtio_queue_host_notifier_read,
+                           virtio_queue_host_notifier_aio_poll,
+                           virtio_queue_host_notifier_aio_poll_ready);
+    aio_set_event_notifier_poll(ctx, &vq->host_notifier,
+                                virtio_queue_host_notifier_aio_poll_begin,
+                                virtio_queue_host_notifier_aio_poll_end);
+}
+
+void virtio_queue_aio_detach_host_notifier(VirtQueue *vq, AioContext *ctx)
+{
+    aio_set_event_notifier(ctx, &vq->host_notifier, true, NULL, NULL, NULL);
+    /* Test and clear notifier before after disabling event,
+     * in case poll callback didn't have time to run. */
+    virtio_queue_host_notifier_read(&vq->host_notifier);
 }
 
 void virtio_queue_host_notifier_read(EventNotifier *n)
-- 
2.33.1



  parent reply	other threads:[~2021-12-07 13:37 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-07 13:23 [PATCH v3 0/6] aio-posix: split poll check from ready handler Stefan Hajnoczi
2021-12-07 13:23 ` [PATCH v3 1/6] " Stefan Hajnoczi
2021-12-07 13:23 ` [PATCH v3 2/6] virtio: get rid of VirtIOHandleAIOOutput Stefan Hajnoczi
2021-12-07 13:23 ` [PATCH v3 3/6] virtio-blk: drop unused virtio_blk_handle_vq() return value Stefan Hajnoczi
2021-12-07 13:23 ` [PATCH v3 4/6] virtio-scsi: prepare virtio_scsi_handle_cmd for dataplane Stefan Hajnoczi
2021-12-07 13:23 ` [PATCH v3 5/6] virtio: use ->handle_output() instead of ->handle_aio_output() Stefan Hajnoczi
2021-12-07 13:23 ` Stefan Hajnoczi [this message]
2021-12-09 10:16 ` [PATCH v3 0/6] aio-posix: split poll check from ready handler Stefano Garzarella
2021-12-13 16:01 ` Stefan Hajnoczi

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