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[Qemu-devel] [PATCH 15/21] vfio/ccw: get io region info
From: |
Cornelia Huck |
Subject: |
[Qemu-devel] [PATCH 15/21] vfio/ccw: get io region info |
Date: |
Fri, 19 May 2017 12:55:54 +0200 |
From: Dong Jia Shi <address@hidden>
vfio-ccw provides an MMIO region for I/O operations. We fetch its
information via ioctls here, then we can use it performing I/O
instructions and retrieving I/O results later on.
Reviewed-by: Eric Auger <address@hidden>
Acked-by: Alex Williamson <address@hidden>
Signed-off-by: Dong Jia Shi <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Cornelia Huck <address@hidden>
---
hw/vfio/ccw.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 54 insertions(+)
diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
index 7d2497cee6..7ddcfd7767 100644
--- a/hw/vfio/ccw.c
+++ b/hw/vfio/ccw.c
@@ -12,6 +12,7 @@
*/
#include <linux/vfio.h>
+#include <linux/vfio_ccw.h>
#include <sys/ioctl.h>
#include "qemu/osdep.h"
@@ -26,6 +27,9 @@
typedef struct VFIOCCWDevice {
S390CCWDevice cdev;
VFIODevice vdev;
+ uint64_t io_region_size;
+ uint64_t io_region_offset;
+ struct ccw_io_region *io_region;
} VFIOCCWDevice;
static void vfio_ccw_compute_needs_reset(VFIODevice *vdev)
@@ -50,6 +54,48 @@ static void vfio_ccw_reset(DeviceState *dev)
ioctl(vcdev->vdev.fd, VFIO_DEVICE_RESET);
}
+static void vfio_ccw_get_region(VFIOCCWDevice *vcdev, Error **errp)
+{
+ VFIODevice *vdev = &vcdev->vdev;
+ struct vfio_region_info *info;
+ int ret;
+
+ /* Sanity check device */
+ if (!(vdev->flags & VFIO_DEVICE_FLAGS_CCW)) {
+ error_setg(errp, "vfio: Um, this isn't a vfio-ccw device");
+ return;
+ }
+
+ if (vdev->num_regions < VFIO_CCW_CONFIG_REGION_INDEX + 1) {
+ error_setg(errp, "vfio: Unexpected number of the I/O region %u",
+ vdev->num_regions);
+ return;
+ }
+
+ ret = vfio_get_region_info(vdev, VFIO_CCW_CONFIG_REGION_INDEX, &info);
+ if (ret) {
+ error_setg_errno(errp, -ret, "vfio: Error getting config info");
+ return;
+ }
+
+ vcdev->io_region_size = info->size;
+ if (sizeof(*vcdev->io_region) != vcdev->io_region_size) {
+ error_setg(errp, "vfio: Unexpected size of the I/O region");
+ g_free(info);
+ return;
+ }
+
+ vcdev->io_region_offset = info->offset;
+ vcdev->io_region = g_malloc0(info->size);
+
+ g_free(info);
+}
+
+static void vfio_ccw_put_region(VFIOCCWDevice *vcdev)
+{
+ g_free(vcdev->io_region);
+}
+
static void vfio_put_device(VFIOCCWDevice *vcdev)
{
g_free(vcdev->vdev.name);
@@ -122,8 +168,15 @@ static void vfio_ccw_realize(DeviceState *dev, Error
**errp)
goto out_device_err;
}
+ vfio_ccw_get_region(vcdev, &err);
+ if (err) {
+ goto out_region_err;
+ }
+
return;
+out_region_err:
+ vfio_put_device(vcdev);
out_device_err:
vfio_put_group(group);
out_group_err:
@@ -142,6 +195,7 @@ static void vfio_ccw_unrealize(DeviceState *dev, Error
**errp)
S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(cdev);
VFIOGroup *group = vcdev->vdev.group;
+ vfio_ccw_put_region(vcdev);
vfio_put_device(vcdev);
vfio_put_group(group);
--
2.13.0
- [Qemu-devel] [PATCH 04/21] pc-bios/s390-ccw: Refactor scsi_inquiry function, (continued)
- [Qemu-devel] [PATCH 04/21] pc-bios/s390-ccw: Refactor scsi_inquiry function, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 07/21] pc-bios/s390-ccw: Build a reasonable max_sectors limit, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 06/21] pc-bios/s390-ccw: Get Block Limits VPD device data, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 05/21] pc-bios/s390-ccw: Get list of supported VPD pages, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 11/21] s390x/css: realize css_sch_build_schib, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 12/21] s390x/css: realize css_create_sch, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 08/21] pc-bios/s390-ccw.img: rebuild image, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 10/21] s390x/css: add s390-squash-mcss machine option, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 09/21] linux-headers: update, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 14/21] vfio/ccw: vfio based subchannel passthrough driver, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 15/21] vfio/ccw: get io region info,
Cornelia Huck <=
- [Qemu-devel] [PATCH 13/21] s390x/css: device support for s390-ccw passthrough, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 17/21] s390x/css: introduce and realize ccw-request callback, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 18/21] s390x/css: ccw translation infrastructure, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 16/21] vfio/ccw: get irqs info and set the eventfd fd, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 20/21] MAINTAINERS: Add vfio-ccw maintainer, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 19/21] vfio/ccw: update sense data if a unit check is pending, Cornelia Huck, 2017/05/19
- [Qemu-devel] [PATCH 21/21] s390/kvm: do not reset riccb on initial cpu reset, Cornelia Huck, 2017/05/19