[Intel-gfx] [PATCH v8 13/15] drm/i915: Disable mmap ioctl for gen12+

Thomas Hellström
2021-05-31T17:23:18Z

From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

The platform should exclusively use mmap_offset, one less path to worry
about for discrete.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
---
drivers/gpu/drm/i915/gem/i915_gem_mman.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
index f6fe5cb01438..fd1c9714f8d8 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
@@ -56,10 +56,17 @@ int
i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
+ struct drm_i915_private *i915 = to_i915(dev);
struct drm_i915_gem_mmap *args = data;
struct drm_i915_gem_object *obj;
unsigned long addr;

+ /* mmap ioctl is disallowed for all platforms after TGL-LP. This also
+ * covers all platforms with local memory.
+ */
+ if (INTEL_GEN(i915) >= 12 && !IS_TIGERLAKE(i915))
+ return -EOPNOTSUPP;
+
if (args->flags & ~(I915_MMAP_WC))
return -EINVAL;