drm/i915: Extract i915_module.c

The module init code is somewhat misplaced in i915_pci.c, since it
needs to pull in init/exit functions from every part of the driver and
pollutes the include list a lot.

Extract an i915_module.c file which pulls all the bits together, and
allows us to massively trim the include list of i915_pci.c.

The downside is that have to drop the error path check Jason added to
catch when we set up the pci driver too early. I think that risk is
acceptable for this pretty nice include.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Cc: Jason Ekstrand <jason@jlekstrand.net>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210727121037.2041102-11-daniel.vetter@ffwll.ch

1 files changed, 113 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_module.c b/drivers/gpu/drm/i915/i915_module.c
new file mode 100644
index 000000000000..c578ea8f56a0
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_module.c
@@ -0,0 +1,113 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * Copyright © 2021 Intel Corporation
+ */
+
+#include <linux/console.h>
+
+#include "gem/i915_gem_context.h"
+#include "gem/i915_gem_object.h"
+#include "i915_active.h"
+#include "i915_buddy.h"
+#include "i915_params.h"
+#include "i915_pci.h"
+#include "i915_perf.h"
+#include "i915_request.h"
+#include "i915_scheduler.h"
+#include "i915_selftest.h"
+#include "i915_vma.h"
+
+static int i915_check_nomodeset(void)
+{
+	bool use_kms = true;
+
+	/*
+	 * Enable KMS by default, unless explicitly overriden by
+	 * either the i915.modeset prarameter or by the
+	 * vga_text_mode_force boot option.
+	 */
+
+	if (i915_modparams.modeset == 0)
+		use_kms = false;
+
+	if (vgacon_text_force() && i915_modparams.modeset == -1)
+		use_kms = false;
+
+	if (!use_kms) {
+		/* Silently fail loading to not upset userspace. */
+		DRM_DEBUG_DRIVER("KMS disabled.\n");
+		return 1;
+	}
+
+	return 0;
+}
+
+static const struct {
+   int (*init)(void);
+   void (*exit)(void);
+} init_funcs[] = {
+	{ i915_check_nomodeset, NULL },
+	{ i915_active_module_init, i915_active_module_exit },
+	{ i915_buddy_module_init, i915_buddy_module_exit },
+	{ i915_context_module_init, i915_context_module_exit },
+	{ i915_gem_context_module_init, i915_gem_context_module_exit },
+	{ i915_objects_module_init, i915_objects_module_exit },
+	{ i915_request_module_init, i915_request_module_exit },
+	{ i915_scheduler_module_init, i915_scheduler_module_exit },
+	{ i915_vma_module_init, i915_vma_module_exit },
+	{ i915_mock_selftests, NULL },
+	{ i915_pmu_init, i915_pmu_exit },
+	{ i915_register_pci_driver, i915_unregister_pci_driver },
+	{ i915_perf_sysctl_register, i915_perf_sysctl_unregister },
+};
+static int init_progress;
+
+static int __init i915_init(void)
+{
+	int err, i;
+
+	for (i = 0; i < ARRAY_SIZE(init_funcs); i++) {
+		err = init_funcs[i].init();
+		if (err < 0) {
+			while (i--) {
+				if (init_funcs[i].exit)
+					init_funcs[i].exit();
+			}
+			return err;
+		} else if (err > 0) {
+			/*
+			 * Early-exit success is reserved for things which
+			 * don't have an exit() function because we have no
+			 * idea how far they got or how to partially tear
+			 * them down.
+			 */
+			WARN_ON(init_funcs[i].exit);
+			break;
+		}
+	}
+
+	init_progress = i;
+
+	return 0;
+}
+
+static void __exit i915_exit(void)
+{
+	int i;
+
+	for (i = init_progress - 1; i >= 0; i--) {
+		GEM_BUG_ON(i >= ARRAY_SIZE(init_funcs));
+		if (init_funcs[i].exit)
+			init_funcs[i].exit();
+	}
+}
+
+module_init(i915_init);
+module_exit(i915_exit);
+
+MODULE_AUTHOR("Tungsten Graphics, Inc.");
+MODULE_AUTHOR("Intel Corporation");
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL and additional rights");