Same old gem_create but with now with extensions support. This is needed
to support various upcoming usecases.
v2:(Chris)
- Use separate ioctl number for gem_create_ext, instead of hijacking
the existing gem_create ioctl, otherwise we run into the issue
with being unable to detect if the kernel supports the new extension
behaviour.
- We now have gem_create_ext.flags, which should be zeroed.
- I915_GEM_CREATE_EXT_SETPARAM value is now zero, since this is the
index into our array of extensions.
- Setup a "vanilla" object which we can directly apply our extensions
to.
v3:(Daniel & Jason)
- drop I915_GEM_CREATE_EXT_SETPARAM. Instead just have each extension
do one thing only, instead of generic setparam which can cover
various use cases.
- add some kernel-doc.
Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
Signed-off-by: CQ Tang <cq.tang@xxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
Cc: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxxxxxxxx>
Cc: Jordan Justen <jordan.l.justen@xxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Cc: Kenneth Graunke <kenneth@xxxxxxxxxxxxx>
Cc: Jason Ekstrand <jason@xxxxxxxxxxxxxx>
Cc: Dave Airlie <airlied@xxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: mesa-dev@xxxxxxxxxxxxxxxxxxxxx
Reviewed-by: Kenneth Graunke <kenneth@xxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gem/i915_gem_create.c | 56 ++++++++++++++++++++++
drivers/gpu/drm/i915/gem/i915_gem_ioctls.h | 2 +
drivers/gpu/drm/i915/i915_drv.c | 1 +
include/uapi/drm/i915_drm.h | 42 ++++++++++++++++
4 files changed, 101 insertions(+)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_create.c b/drivers/gpu/drm/i915/gem/i915_gem_create.c
index 409226df0dd2..1e82633a3898 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_create.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_create.c
@@ -8,6 +8,7 @@
#include "i915_drv.h"
#include "i915_trace.h"
+#include "i915_user_extensions.h"
static int i915_gem_publish(struct drm_i915_gem_object *obj,
struct drm_file *file,
@@ -149,3 +150,58 @@ i915_gem_create_ioctl(struct drm_device *dev, void *data,
i915_gem_object_free(obj);
return ret;
}
+
+struct create_ext {
+ struct drm_i915_private *i915;
+ struct drm_i915_gem_object *vanilla_object;
+};
+
+static const i915_user_extension_fn create_extensions[] = {
+};
+
+/**
+ * Creates a new mm object and returns a handle to it.
+ * @dev: drm device pointer
+ * @data: ioctl data blob
+ * @file: drm file pointer
+ */
+int
+i915_gem_create_ext_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file)
+{
+ struct drm_i915_private *i915 = to_i915(dev);
+ struct drm_i915_gem_create_ext *args = data;
+ struct create_ext ext_data = { .i915 = i915 };
+ struct drm_i915_gem_object *obj;
+ int ret;
+
+ if (args->flags)
+ return -EINVAL;
+
+ i915_gem_flush_free_objects(i915);
+
+ obj = i915_gem_object_alloc();
+ if (!obj)
+ return -ENOMEM;
+
+ ext_data.vanilla_object = obj;
+ ret = i915_user_extensions(u64_to_user_ptr(args->extensions),
+ create_extensions,
+ ARRAY_SIZE(create_extensions),
+ &ext_data);
+ if (ret)
+ goto object_free;
+
+ ret = i915_gem_setup(obj,
+ intel_memory_region_by_type(i915,
+ INTEL_MEMORY_SYSTEM),
+ args->size);
+ if (ret)
+ goto object_free;
+
+ return i915_gem_publish(obj, file, &args->size, &args->handle);
+
+object_free:
+ i915_gem_object_free(obj);
+ return ret;
+}
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ioctls.h b/drivers/gpu/drm/i915/gem/i915_gem_ioctls.h
index 7fd22f3efbef..28d6526e32ab 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ioctls.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ioctls.h
@@ -14,6 +14,8 @@ int i915_gem_busy_ioctl(struct drm_device *dev, void *data,
struct drm_file *file);
int i915_gem_create_ioctl(struct drm_device *dev, void *data,
struct drm_file *file);
+int i915_gem_create_ext_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file);
int i915_gem_execbuffer2_ioctl(struct drm_device *dev, void *data,
struct drm_file *file);
int i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 785dcf20c77b..b5878c089830 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1728,6 +1728,7 @@ static const struct drm_ioctl_desc i915_ioctls[] = {
DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF_DRV(I915_GEM_CREATE_EXT, i915_gem_create_ext_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_RENDER_ALLOW),
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 57c376680a60..1a654a144889 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -406,6 +406,7 @@ typedef struct _drm_i915_sarea {
#define DRM_I915_QUERY 0x39
#define DRM_I915_GEM_VM_CREATE 0x3a
#define DRM_I915_GEM_VM_DESTROY 0x3b
+#define DRM_I915_GEM_CREATE_EXT 0x3c
/* Must be kept compact -- no holes */
#define DRM_IOCTL_I915_INIT DRM_IOW( DRM_COMMAND_BASE + DRM_I915_INIT, drm_i915_init_t)
@@ -438,6 +439,7 @@ typedef struct _drm_i915_sarea {
#define DRM_IOCTL_I915_GEM_ENTERVT DRM_IO(DRM_COMMAND_BASE + DRM_I915_GEM_ENTERVT)
#define DRM_IOCTL_I915_GEM_LEAVEVT DRM_IO(DRM_COMMAND_BASE + DRM_I915_GEM_LEAVEVT)
#define DRM_IOCTL_I915_GEM_CREATE DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_CREATE, struct drm_i915_gem_create)
+#define DRM_IOCTL_I915_GEM_CREATE_EXT DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_CREATE_EXT, struct drm_i915_gem_create_ext)
#define DRM_IOCTL_I915_GEM_PREAD DRM_IOW (DRM_COMMAND_BASE + DRM_I915_GEM_PREAD, struct drm_i915_gem_pread)
#define DRM_IOCTL_I915_GEM_PWRITE DRM_IOW (DRM_COMMAND_BASE + DRM_I915_GEM_PWRITE, struct drm_i915_gem_pwrite)
#define DRM_IOCTL_I915_GEM_MMAP DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_MMAP, struct drm_i915_gem_mmap)
@@ -2598,6 +2600,46 @@ struct drm_i915_query_memory_regions {
struct drm_i915_memory_region_info regions[];
};
+/**
+ * struct drm_i915_gem_create_ext - Existing gem_create behaviour, with added
+ * extension support using struct i915_user_extension.
+ *
+ * Note that in the future we want to have our buffer flags here, at least for
+ * the stuff that is immutable. Previously we would have two ioctls, one to
+ * create the object with gem_create, and another to apply various parameters,
+ * however this creates some ambiguity for the params which are considered
+ * immutable. Also in general we're phasing out the various SET/GET ioctls.
+ */
+struct drm_i915_gem_create_ext {
+ /**
+ * @size: Requested size for the object.
+ *
+ * The (page-aligned) allocated size for the object will be returned.
+ *
+ */
+ __u64 size;
+ /**
+ * @handle: Returned handle for the object.
+ *
+ * Object handles are nonzero.
+ */
+ __u32 handle;
+ /** @flags: MBZ */
+ __u32 flags;
+ /**
+ * @extensions: The chain of extensions to apply to this object.
+ *
+ * This will be useful in the future when we need to support several
+ * different extensions, and we need to apply more than one when
+ * creating the object. See struct i915_user_extension.
+ *
+ * If we don't supply any extensions then we get the same old gem_create
+ * behaviour.
+ *
+ */
+ __u64 extensions;
+};
+
#if defined(__cplusplus)
}
#endif
--
2.26.3
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