From 6603f216dbc07a1d221b1665409cfec6cc9960e2 Mon Sep 17 00:00:00 2001 From: Stefan Hajnoczi 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 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 RH-Acked-by: Kevin Wolf RH-Acked-by: Stefano Garzarella 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 Reviewed-by: Paolo Bonzini Message-id: 20220427143541.119567-7-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi (cherry picked from commit 3dc584abeef0e1277c2de8c1c1974cb49444eb0a) Signed-off-by: Stefan Hajnoczi --- 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