diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/821-vfio-0005-vfio-fsl-mc-Allow-userspace-to-MMAP-fsl-mc-device-MM.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/821-vfio-0005-vfio-fsl-mc-Allow-userspace-to-MMAP-fsl-mc-device-MM.patch | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/target/linux/layerscape/patches-5.4/821-vfio-0005-vfio-fsl-mc-Allow-userspace-to-MMAP-fsl-mc-device-MM.patch b/target/linux/layerscape/patches-5.4/821-vfio-0005-vfio-fsl-mc-Allow-userspace-to-MMAP-fsl-mc-device-MM.patch deleted file mode 100644 index 67bdd20800..0000000000 --- a/target/linux/layerscape/patches-5.4/821-vfio-0005-vfio-fsl-mc-Allow-userspace-to-MMAP-fsl-mc-device-MM.patch +++ /dev/null @@ -1,99 +0,0 @@ -From 3b81ac2bdcff0f611cad468329cc726600bb23ba Mon Sep 17 00:00:00 2001 -From: Diana Craciun <diana.craciun@nxp.com> -Date: Fri, 27 Sep 2019 16:40:34 +0300 -Subject: [PATCH] vfio/fsl-mc: Allow userspace to MMAP fsl-mc device MMIO - regions - -Allow userspace to mmap device regions for direct access of -fsl-mc devices. - -Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com> -Signed-off-by: Diana Craciun <diana.craciun@nxp.com> ---- - drivers/vfio/fsl-mc/vfio_fsl_mc.c | 65 +++++++++++++++++++++++++++++++++++++-- - 1 file changed, 63 insertions(+), 2 deletions(-) - ---- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c -+++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c -@@ -32,7 +32,10 @@ static int vfio_fsl_mc_regions_init(stru - - vdev->regions[i].addr = res->start; - vdev->regions[i].size = PAGE_ALIGN((resource_size(res))); -- vdev->regions[i].flags = 0; -+ vdev->regions[i].flags = VFIO_REGION_INFO_FLAG_MMAP; -+ vdev->regions[i].flags |= VFIO_REGION_INFO_FLAG_READ; -+ if (!(mc_dev->regions[i].flags & IORESOURCE_READONLY)) -+ vdev->regions[i].flags |= VFIO_REGION_INFO_FLAG_WRITE; - } - - vdev->num_regions = mc_dev->obj_desc.region_count; -@@ -163,10 +166,68 @@ static ssize_t vfio_fsl_mc_write(void *d - return -EINVAL; - } - -+static int vfio_fsl_mc_mmap_mmio(struct vfio_fsl_mc_region region, -+ struct vm_area_struct *vma) -+{ -+ u64 size = vma->vm_end - vma->vm_start; -+ u64 pgoff, base; -+ -+ pgoff = vma->vm_pgoff & -+ ((1U << (VFIO_FSL_MC_OFFSET_SHIFT - PAGE_SHIFT)) - 1); -+ base = pgoff << PAGE_SHIFT; -+ -+ if (region.size < PAGE_SIZE || base + size > region.size) -+ return -EINVAL; -+ -+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); -+ -+ vma->vm_pgoff = (region.addr >> PAGE_SHIFT) + pgoff; -+ -+ return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, -+ size, vma->vm_page_prot); -+} -+ - static int vfio_fsl_mc_mmap(void *device_data, struct vm_area_struct *vma) - { -- return -EINVAL; -+ struct vfio_fsl_mc_device *vdev = device_data; -+ struct fsl_mc_device *mc_dev = vdev->mc_dev; -+ unsigned long size, addr; -+ int index; -+ -+ index = vma->vm_pgoff >> (VFIO_FSL_MC_OFFSET_SHIFT - PAGE_SHIFT); -+ -+ if (vma->vm_end < vma->vm_start) -+ return -EINVAL; -+ if (vma->vm_start & ~PAGE_MASK) -+ return -EINVAL; -+ if (vma->vm_end & ~PAGE_MASK) -+ return -EINVAL; -+ if (!(vma->vm_flags & VM_SHARED)) -+ return -EINVAL; -+ if (index >= vdev->num_regions) -+ return -EINVAL; -+ -+ if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_MMAP)) -+ return -EINVAL; -+ -+ if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_READ) -+ && (vma->vm_flags & VM_READ)) -+ return -EINVAL; -+ -+ if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_WRITE) -+ && (vma->vm_flags & VM_WRITE)) -+ return -EINVAL; -+ -+ addr = vdev->regions[index].addr; -+ size = vdev->regions[index].size; -+ -+ vma->vm_private_data = mc_dev; -+ -+ return vfio_fsl_mc_mmap_mmio(vdev->regions[index], vma); -+ -+ return -EFAULT; - } -+ - static int vfio_fsl_mc_init_device(struct vfio_fsl_mc_device *vdev) - { - struct fsl_mc_device *mc_dev = vdev->mc_dev; |