From: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> To: kvm@vger.kernel.org, linux-s390@vger.kernel.org, qemu-devel@nongnu.org Cc: bjsdjshi@linux.vnet.ibm.com, cornelia.huck@de.ibm.com, borntraeger@de.ibm.com, agraf@suse.com, alex.williamson@redhat.com, eric.auger@redhat.com Subject: [PATCH v7 08/13] vfio/ccw: get io region info Date: Fri, 5 May 2017 04:03:47 +0200 [thread overview] Message-ID: <20170505020352.8984-9-bjsdjshi@linux.vnet.ibm.com> (raw) In-Reply-To: <20170505020352.8984-1-bjsdjshi@linux.vnet.ibm.com> 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. Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> --- hw/vfio/ccw.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c index 7d2497c..7ddcfd7 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); -- 2.10.2
WARNING: multiple messages have this Message-ID (diff)
From: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> To: kvm@vger.kernel.org, linux-s390@vger.kernel.org, qemu-devel@nongnu.org Cc: bjsdjshi@linux.vnet.ibm.com, cornelia.huck@de.ibm.com, borntraeger@de.ibm.com, agraf@suse.com, alex.williamson@redhat.com, eric.auger@redhat.com Subject: [Qemu-devel] [PATCH v7 08/13] vfio/ccw: get io region info Date: Fri, 5 May 2017 04:03:47 +0200 [thread overview] Message-ID: <20170505020352.8984-9-bjsdjshi@linux.vnet.ibm.com> (raw) In-Reply-To: <20170505020352.8984-1-bjsdjshi@linux.vnet.ibm.com> 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. Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> --- hw/vfio/ccw.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c index 7d2497c..7ddcfd7 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); -- 2.10.2
next prev parent reply other threads:[~2017-05-05 2:03 UTC|newest] Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-05-05 2:03 [PATCH v7 00/13] basic channel IO passthrough infrastructure based on vfio Dong Jia Shi 2017-05-05 2:03 ` [Qemu-devel] " Dong Jia Shi 2017-05-05 2:03 ` [PATCH v7 01/13] update-linux-headers: update for vfio-ccw Dong Jia Shi 2017-05-05 2:03 ` [Qemu-devel] " Dong Jia Shi 2017-05-05 2:03 ` [PATCH v7 02/13] vfio: linux-headers " Dong Jia Shi 2017-05-05 2:03 ` [Qemu-devel] " Dong Jia Shi 2017-05-05 2:03 ` [PATCH v7 03/13] s390x/css: add s390-squash-mcss machine option Dong Jia Shi 2017-05-05 2:03 ` [Qemu-devel] " Dong Jia Shi 2017-05-05 2:03 ` [PATCH v7 04/13] s390x/css: realize css_sch_build_schib Dong Jia Shi 2017-05-05 2:03 ` [Qemu-devel] " Dong Jia Shi 2017-05-05 12:04 ` Cornelia Huck 2017-05-05 12:04 ` [Qemu-devel] " Cornelia Huck 2017-05-08 3:07 ` Dong Jia Shi 2017-05-05 2:03 ` [PATCH v7 05/13] s390x/css: realize css_create_sch Dong Jia Shi 2017-05-05 2:03 ` [Qemu-devel] " Dong Jia Shi 2017-05-05 12:11 ` Cornelia Huck 2017-05-05 12:11 ` [Qemu-devel] " Cornelia Huck 2017-05-08 5:18 ` Dong Jia Shi 2017-05-08 10:50 ` Cornelia Huck 2017-05-08 10:50 ` [Qemu-devel] " Cornelia Huck 2017-05-09 1:38 ` Dong Jia Shi 2017-05-05 2:03 ` [PATCH v7 06/13] s390x/css: device support for s390-ccw passthrough Dong Jia Shi 2017-05-05 2:03 ` [Qemu-devel] " Dong Jia Shi 2017-05-09 8:18 ` Auger Eric 2017-05-11 21:13 ` Alex Williamson 2017-05-11 21:13 ` [Qemu-devel] " Alex Williamson 2017-05-15 2:22 ` Dong Jia Shi 2017-05-05 2:03 ` [PATCH v7 07/13] vfio/ccw: vfio based subchannel passthrough driver Dong Jia Shi 2017-05-05 2:03 ` [Qemu-devel] " Dong Jia Shi 2017-05-09 8:19 ` Auger Eric 2017-05-09 8:19 ` [Qemu-devel] " Auger Eric 2017-05-11 21:48 ` Alex Williamson 2017-05-11 21:48 ` [Qemu-devel] " Alex Williamson 2017-05-05 2:03 ` Dong Jia Shi [this message] 2017-05-05 2:03 ` [Qemu-devel] [PATCH v7 08/13] vfio/ccw: get io region info Dong Jia Shi 2017-05-09 8:20 ` Auger Eric 2017-05-11 21:48 ` Alex Williamson 2017-05-11 21:48 ` [Qemu-devel] " Alex Williamson 2017-05-05 2:03 ` [PATCH v7 09/13] vfio/ccw: get irqs info and set the eventfd fd Dong Jia Shi 2017-05-05 2:03 ` [Qemu-devel] " Dong Jia Shi 2017-05-09 8:21 ` Auger Eric 2017-05-09 8:21 ` [Qemu-devel] " Auger Eric 2017-05-09 8:35 ` Dong Jia Shi 2017-05-11 21:49 ` Alex Williamson 2017-05-11 21:49 ` [Qemu-devel] " Alex Williamson 2017-05-15 2:31 ` Dong Jia Shi 2017-05-15 2:35 ` Dong Jia Shi 2017-05-05 2:03 ` [PATCH v7 10/13] s390x/css: introduce and realize ccw-request callback Dong Jia Shi 2017-05-05 2:03 ` [Qemu-devel] " Dong Jia Shi 2017-05-11 21:49 ` Alex Williamson 2017-05-11 21:49 ` [Qemu-devel] " Alex Williamson 2017-05-05 2:03 ` [PATCH v7 11/13] s390x/css: ccw translation infrastructure Dong Jia Shi 2017-05-05 2:03 ` [Qemu-devel] " Dong Jia Shi 2017-05-05 2:03 ` [PATCH v7 12/13] vfio/ccw: update sense data if a unit check is pending Dong Jia Shi 2017-05-05 2:03 ` [Qemu-devel] " Dong Jia Shi 2017-05-11 21:49 ` Alex Williamson 2017-05-11 21:49 ` [Qemu-devel] " Alex Williamson 2017-05-05 2:03 ` [PATCH v7 13/13] MAINTAINERS: Add vfio-ccw maintainer Dong Jia Shi 2017-05-05 2:03 ` [Qemu-devel] " Dong Jia Shi 2017-05-05 12:20 ` Cornelia Huck 2017-05-05 12:20 ` [Qemu-devel] " Cornelia Huck 2017-05-08 5:29 ` Dong Jia Shi 2017-05-08 9:09 ` Cornelia Huck 2017-05-08 9:09 ` [Qemu-devel] " Cornelia Huck 2017-05-09 1:41 ` Dong Jia Shi 2017-05-09 7:33 ` Cornelia Huck 2017-05-09 7:33 ` [Qemu-devel] " Cornelia Huck 2017-05-11 21:49 ` Alex Williamson 2017-05-11 21:49 ` [Qemu-devel] " Alex Williamson 2017-05-05 12:22 ` [PATCH v7 00/13] basic channel IO passthrough infrastructure based on vfio Cornelia Huck 2017-05-05 12:22 ` [Qemu-devel] " Cornelia Huck 2017-05-08 5:31 ` Dong Jia Shi
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