drm/i915: rework gem_create flow for upcoming extensions

With the upcoming gem_create_ext we want to be able create a "vanilla"
object upfront and pass that directly to the extensions, before actually
initialising the object. Functionally this should be the same expect we
now feed the object into the lower-level region specific init_object.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Lionel Landwerlin <lionel.g.landwerlin@linux.intel.com>
Cc: Jon Bloomfield <jon.bloomfield@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Kenneth Graunke <kenneth@whitecape.org>
Cc: Jason Ekstrand <jason@jlekstrand.net>
Cc: Dave Airlie <airlied@gmail.com>
Cc: dri-devel@lists.freedesktop.org
Cc: mesa-dev@lists.freedesktop.org
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210429103056.407067-4-matthew.auld@intel.com

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_create.c b/drivers/gpu/drm/i915/gem/i915_gem_create.c
index 45d60e3..409226d 100644 (file)
--- a/drivers/gpu/drm/i915/gem/i915_gem_create.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_create.c
@@ -7,41 +7,51 @@
 #include "gem/i915_gem_region.h"
 
 #include "i915_drv.h"
+#include "i915_trace.h"
+
+static int i915_gem_publish(struct drm_i915_gem_object *obj,
+                           struct drm_file *file,
+                           u64 *size_p,
+                           u32 *handle_p)
+{
+       u64 size = obj->base.size;
+       int ret;
+
+       ret = drm_gem_handle_create(file, &obj->base, handle_p);
+       /* drop reference from allocate - handle holds it now */
+       i915_gem_object_put(obj);
+       if (ret)
+               return ret;
+
+       *size_p = size;
+       return 0;
+}
 
 static int
-i915_gem_create(struct drm_file *file,
-               struct intel_memory_region *mr,
-               u64 *size_p,
-               u32 *handle_p)
+i915_gem_setup(struct drm_i915_gem_object *obj,
+              struct intel_memory_region *mr,
+              u64 size)
 {
-       struct drm_i915_gem_object *obj;
-       u32 handle;
-       u64 size;
        int ret;
 
        GEM_BUG_ON(!is_power_of_2(mr->min_page_size));
-       size = round_up(*size_p, mr->min_page_size);
+       size = round_up(size, mr->min_page_size);
        if (size == 0)
                return -EINVAL;
 
        /* For most of the ABI (e.g. mmap) we think in system pages */
        GEM_BUG_ON(!IS_ALIGNED(size, PAGE_SIZE));
 
-       /* Allocate the new object */
-       obj = i915_gem_object_create_region(mr, size, 0);
-       if (IS_ERR(obj))
-               return PTR_ERR(obj);
-
-       GEM_BUG_ON(size != obj->base.size);
+       if (i915_gem_object_size_2big(size))
+               return -E2BIG;
 
-       ret = drm_gem_handle_create(file, &obj->base, &handle);
-       /* drop reference from allocate - handle holds it now */
-       i915_gem_object_put(obj);
+       ret = mr->ops->init_object(mr, obj, size, 0);
        if (ret)
                return ret;
 
-       *handle_p = handle;
-       *size_p = size;
+       GEM_BUG_ON(size != obj->base.size);
+
+       trace_i915_gem_object_create(obj);
        return 0;
 }
 
@@ -50,9 +60,11 @@ i915_gem_dumb_create(struct drm_file *file,
                     struct drm_device *dev,
                     struct drm_mode_create_dumb *args)
 {
+       struct drm_i915_gem_object *obj;
        enum intel_memory_type mem_type;
        int cpp = DIV_ROUND_UP(args->bpp, 8);
        u32 format;
+       int ret;
 
        switch (cpp) {
        case 1:
@@ -85,10 +97,22 @@ i915_gem_dumb_create(struct drm_file *file,
        if (HAS_LMEM(to_i915(dev)))
                mem_type = INTEL_MEMORY_LOCAL;
 
-       return i915_gem_create(file,
-                              intel_memory_region_by_type(to_i915(dev),
-                                                          mem_type),
-                              &args->size, &args->handle);
+       obj = i915_gem_object_alloc();
+       if (!obj)
+               return -ENOMEM;
+
+       ret = i915_gem_setup(obj,
+                            intel_memory_region_by_type(to_i915(dev),
+                                                        mem_type),
+                            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;
 }
 
 /**
@@ -103,11 +127,25 @@ i915_gem_create_ioctl(struct drm_device *dev, void *data,
 {
        struct drm_i915_private *i915 = to_i915(dev);
        struct drm_i915_gem_create *args = data;
+       struct drm_i915_gem_object *obj;
+       int ret;
 
        i915_gem_flush_free_objects(i915);
 
-       return i915_gem_create(file,
-                              intel_memory_region_by_type(i915,
-                                                          INTEL_MEMORY_SYSTEM),
-                              &args->size, &args->handle);
+       obj = i915_gem_object_alloc();
+       if (!obj)
+               return -ENOMEM;
+
+       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;
 }