From: Diana Craciun <diana.craciun@oss.nxp.com>
To: alex.williamson@redhat.com, kvm@vger.kernel.org
Cc: bharatb.linux@gmail.com, linux-kernel@vger.kernel.org,
laurentiu.tudor@nxp.com,
Diana Craciun <diana.craciun@oss.nxp.com>,
Bharat Bhushan <Bharat.Bhushan@nxp.com>
Subject: [PATCH v3 3/9] vfio/fsl-mc: Implement VFIO_DEVICE_GET_INFO ioctl
Date: Mon, 6 Jul 2020 18:41:47 +0300 [thread overview]
Message-ID: <20200706154153.11477-4-diana.craciun@oss.nxp.com> (raw)
In-Reply-To: <20200706154153.11477-1-diana.craciun@oss.nxp.com>
Allow userspace to get fsl-mc device info (number of regions
and irqs).
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
Signed-off-by: Diana Craciun <diana.craciun@oss.nxp.com>
---
drivers/vfio/fsl-mc/vfio_fsl_mc.c | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
index ad8d06cceb71..937b6eddc71a 100644
--- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c
+++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
@@ -33,10 +33,29 @@ static void vfio_fsl_mc_release(void *device_data)
static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd,
unsigned long arg)
{
+ unsigned long minsz;
+ struct vfio_fsl_mc_device *vdev = device_data;
+ struct fsl_mc_device *mc_dev = vdev->mc_dev;
+
switch (cmd) {
case VFIO_DEVICE_GET_INFO:
{
- return -ENOTTY;
+ struct vfio_device_info info;
+
+ minsz = offsetofend(struct vfio_device_info, num_irqs);
+
+ if (copy_from_user(&info, (void __user *)arg, minsz))
+ return -EFAULT;
+
+ if (info.argsz < minsz)
+ return -EINVAL;
+
+ info.flags = VFIO_DEVICE_FLAGS_FSL_MC;
+ info.num_regions = mc_dev->obj_desc.region_count;
+ info.num_irqs = mc_dev->obj_desc.irq_count;
+
+ return copy_to_user((void __user *)arg, &info, minsz) ?
+ -EFAULT : 0;
}
case VFIO_DEVICE_GET_REGION_INFO:
{
--
2.17.1
next prev parent reply other threads:[~2020-07-06 15:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-06 15:41 [PATCH v3 0/9] vfio/fsl-mc: VFIO support for FSL-MC devices Diana Craciun
2020-07-06 15:41 ` [PATCH v3 1/9] vfio/fsl-mc: Add VFIO framework skeleton for fsl-mc devices Diana Craciun
2020-07-06 15:41 ` [PATCH v3 2/9] vfio/fsl-mc: Scan DPRC objects on vfio-fsl-mc driver bind Diana Craciun
2020-07-09 22:44 ` Alex Williamson
2020-07-06 15:41 ` Diana Craciun [this message]
2020-07-06 15:41 ` [PATCH v3 4/9] vfio/fsl-mc: Implement VFIO_DEVICE_GET_REGION_INFO ioctl call Diana Craciun
2020-07-09 22:53 ` Alex Williamson
2020-07-06 15:41 ` [PATCH v3 5/9] vfio/fsl-mc: Allow userspace to MMAP fsl-mc device MMIO regions Diana Craciun
2020-07-06 15:41 ` [PATCH v3 6/9] vfio/fsl-mc: Added lock support in preparation for interrupt handling Diana Craciun
2020-07-06 15:41 ` [PATCH v3 7/9] vfio/fsl-mc: Add irq infrastructure for fsl-mc devices Diana Craciun
2020-07-06 15:41 ` [PATCH v3 8/9] vfio/fsl-mc: trigger an interrupt via eventfd Diana Craciun
2020-07-06 15:41 ` [PATCH v3 9/9] vfio/fsl-mc: Add read/write support for fsl-mc devices Diana Craciun
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