diff options
| author | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2021-06-10 09:01:52 +0200 |
|---|---|---|
| committer | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2021-06-11 10:53:25 +0200 |
| commit | cf3e3e86d77970211e0983130e896ae242601003 (patch) | |
| tree | 328ad5fa59ab5807c27b2562ca26a94162cc99d4 /drivers/gpu/drm/i915/selftests/igt_mmap.c | |
| parent | f425821b946847282708121600fffc20344183a0 (diff) | |
drm/i915: Use ttm mmap handling for ttm bo's.
Use the ttm handlers for servicing page faults, and vm_access.
We do our own validation of read-only access, otherwise use the
ttm handlers as much as possible.
Because the ttm handlers expect the vma_node at vma->base, we slightly
need to massage the mmap handlers to look at vma_node->driver_private
to fetch the bo, if it's NULL, we assume i915's normal mmap_offset uapi
is used.
This is the easiest way to achieve compatibility without changing ttm's
semantics.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210610070152.572423-5-thomas.hellstrom@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/selftests/igt_mmap.c')
| -rw-r--r-- | drivers/gpu/drm/i915/selftests/igt_mmap.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/selftests/igt_mmap.c b/drivers/gpu/drm/i915/selftests/igt_mmap.c index 583a4ff8b8c9..e920a461bd36 100644 --- a/drivers/gpu/drm/i915/selftests/igt_mmap.c +++ b/drivers/gpu/drm/i915/selftests/igt_mmap.c @@ -9,15 +9,28 @@ #include "i915_drv.h" #include "igt_mmap.h" -unsigned long igt_mmap_node(struct drm_i915_private *i915, - struct drm_vma_offset_node *node, - unsigned long addr, - unsigned long prot, - unsigned long flags) +unsigned long igt_mmap_offset(struct drm_i915_private *i915, + u64 offset, + unsigned long size, + unsigned long prot, + unsigned long flags) { + struct drm_vma_offset_node *node; struct file *file; + unsigned long addr; int err; + /* no need to refcount, we own this object */ + drm_vma_offset_lock_lookup(i915->drm.vma_offset_manager); + node = drm_vma_offset_exact_lookup_locked(i915->drm.vma_offset_manager, + offset / PAGE_SIZE, size / PAGE_SIZE); + drm_vma_offset_unlock_lookup(i915->drm.vma_offset_manager); + + if (GEM_WARN_ON(!node)) { + pr_info("Failed to lookup %llx\n", offset); + return -ENOENT; + } + /* Pretend to open("/dev/dri/card0") */ file = mock_drm_getfile(i915->drm.primary, O_RDWR); if (IS_ERR(file)) @@ -29,7 +42,7 @@ unsigned long igt_mmap_node(struct drm_i915_private *i915, goto out_file; } - addr = vm_mmap(file, addr, drm_vma_node_size(node) << PAGE_SHIFT, + addr = vm_mmap(file, 0, drm_vma_node_size(node) << PAGE_SHIFT, prot, flags, drm_vma_node_offset_addr(node)); drm_vma_node_revoke(node, file->private_data); |