From 6603f216dbc07a1d221b1665409cfec6cc9960e2 Mon Sep 17 00:00:00 2001
From: Stefan Hajnoczi <stefanha@redhat.com>
Date: Tue, 17 May 2022 09:28:26 +0100
Subject: [PATCH 14/16] virtio-scsi: move request-related items from .h to .c
RH-Author: Stefan Hajnoczi <stefanha@redhat.com>
RH-MergeRequest: 88: virtio-scsi: fix 100% CPU consumption with IOThreads
RH-Commit: [6/6] ecdf5289abd04062c85c5ed8e577a5249684a3b0 (stefanha/centos-stream-qemu-kvm)
RH-Bugzilla: 2079347
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
There is no longer a need to expose the request and related APIs in
virtio-scsi.h since there are no callers outside virtio-scsi.c.
Note the block comment in VirtIOSCSIReq has been adjusted to meet the
coding style.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20220427143541.119567-7-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
(cherry picked from commit 3dc584abeef0e1277c2de8c1c1974cb49444eb0a)
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
hw/scsi/virtio-scsi.c | 45 ++++++++++++++++++++++++++++++---
include/hw/virtio/virtio-scsi.h | 40 -----------------------------
2 files changed, 41 insertions(+), 44 deletions(-)
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index df5ff8bab7..2450c9438c 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -29,6 +29,43 @@
#include "hw/virtio/virtio-access.h"
#include "trace.h"
+typedef struct VirtIOSCSIReq {
+ /*
+ * Note:
+ * - fields up to resp_iov are initialized by virtio_scsi_init_req;
+ * - fields starting at vring are zeroed by virtio_scsi_init_req.
+ */
+ VirtQueueElement elem;
+
+ VirtIOSCSI *dev;
+ VirtQueue *vq;
+ QEMUSGList qsgl;
+ QEMUIOVector resp_iov;
+
+ union {
+ /* Used for two-stage request submission */
+ QTAILQ_ENTRY(VirtIOSCSIReq) next;
+
+ /* Used for cancellation of request during TMFs */
+ int remaining;
+ };
+
+ SCSIRequest *sreq;
+ size_t resp_size;
+ enum SCSIXferMode mode;
+ union {
+ VirtIOSCSICmdResp cmd;
+ VirtIOSCSICtrlTMFResp tmf;
+ VirtIOSCSICtrlANResp an;
+ VirtIOSCSIEvent event;
+ } resp;
+ union {
+ VirtIOSCSICmdReq cmd;
+ VirtIOSCSICtrlTMFReq tmf;
+ VirtIOSCSICtrlANReq an;
+ } req;
+} VirtIOSCSIReq;
+
static inline int virtio_scsi_get_lun(uint8_t *lun)
{
return ((lun[2] << 8) | lun[3]) & 0x3FFF;
@@ -45,7 +82,7 @@ static inline SCSIDevice *virtio_scsi_device_get(VirtIOSCSI *s, uint8_t *lun)
return scsi_device_get(&s->bus, 0, lun[1], virtio_scsi_get_lun(lun));
}
-void virtio_scsi_init_req(VirtIOSCSI *s, VirtQueue *vq, VirtIOSCSIReq *req)
+static void virtio_scsi_init_req(VirtIOSCSI *s, VirtQueue *vq, VirtIOSCSIReq *req)
{
VirtIODevice *vdev = VIRTIO_DEVICE(s);
const size_t zero_skip =
@@ -58,7 +95,7 @@ void virtio_scsi_init_req(VirtIOSCSI *s, VirtQueue *vq, VirtIOSCSIReq *req)
memset((uint8_t *)req + zero_skip, 0, sizeof(*req) - zero_skip);
}
-void virtio_scsi_free_req(VirtIOSCSIReq *req)
+static void virtio_scsi_free_req(VirtIOSCSIReq *req)
{
qemu_iovec_destroy(&req->resp_iov);
qemu_sglist_destroy(&req->qsgl);
@@ -801,8 +838,8 @@ static void virtio_scsi_reset(VirtIODevice *vdev)
s->events_dropped = false;
}
-void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
- uint32_t event, uint32_t reason)
+static void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
+ uint32_t event, uint32_t reason)
{
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
VirtIOSCSIReq *req;
diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h
index 2497530064..abdda2cbd0 100644
--- a/include/hw/virtio/virtio-scsi.h
+++ b/include/hw/virtio/virtio-scsi.h
@@ -94,42 +94,6 @@ struct VirtIOSCSI {
uint32_t host_features;
};
-typedef struct VirtIOSCSIReq {
- /* Note:
- * - fields up to resp_iov are initialized by virtio_scsi_init_req;
- * - fields starting at vring are zeroed by virtio_scsi_init_req.
- * */
- VirtQueueElement elem;
-
- VirtIOSCSI *dev;
- VirtQueue *vq;
- QEMUSGList qsgl;
- QEMUIOVector resp_iov;
-
- union {
- /* Used for two-stage request submission */
- QTAILQ_ENTRY(VirtIOSCSIReq) next;
-
- /* Used for cancellation of request during TMFs */
- int remaining;
- };
-
- SCSIRequest *sreq;
- size_t resp_size;
- enum SCSIXferMode mode;
- union {
- VirtIOSCSICmdResp cmd;
- VirtIOSCSICtrlTMFResp tmf;
- VirtIOSCSICtrlANResp an;
- VirtIOSCSIEvent event;
- } resp;
- union {
- VirtIOSCSICmdReq cmd;
- VirtIOSCSICtrlTMFReq tmf;
- VirtIOSCSICtrlANReq an;
- } req;
-} VirtIOSCSIReq;
-
static inline void virtio_scsi_acquire(VirtIOSCSI *s)
{
if (s->ctx) {
@@ -151,10 +115,6 @@ void virtio_scsi_common_realize(DeviceState *dev,
Error **errp);
void virtio_scsi_common_unrealize(DeviceState *dev);
-void virtio_scsi_init_req(VirtIOSCSI *s, VirtQueue *vq, VirtIOSCSIReq *req);
-void virtio_scsi_free_req(VirtIOSCSIReq *req);
-void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
- uint32_t event, uint32_t reason);
void virtio_scsi_dataplane_setup(VirtIOSCSI *s, Error **errp);
int virtio_scsi_dataplane_start(VirtIODevice *s);
--
2.31.1