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      1 /*	$NetBSD: i915_module.c,v 1.19 2022/07/17 14:10:43 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: i915_module.c,v 1.19 2022/07/17 14:10:43 riastradh Exp $");
     34 
     35 #include <sys/types.h>
     36 #include <sys/module.h>
     37 #ifndef _MODULE
     38 #include <sys/once.h>
     39 #endif
     40 #include <sys/systm.h>
     41 
     42 #include <drm/drm_device.h>
     43 #include <drm/drm_sysctl.h>
     44 
     45 #include "i915_drv.h"
     46 #include "i915_globals.h"
     47 #include "gt/intel_rps.h"
     48 
     49 MODULE(MODULE_CLASS_DRIVER, i915drmkms, "acpivga,drmkms,drmkms_pci"); /* XXX drmkms_i2c */
     50 
     51 #ifdef _MODULE
     52 #include "ioconf.c"
     53 #endif
     54 
     55 struct drm_sysctl_def i915_def = DRM_SYSCTL_INIT();
     56 
     57 /* XXX use link sets for DEFINE_SPINLOCK */
     58 extern spinlock_t i915_sw_fence_lock;
     59 extern spinlock_t *const i915_schedule_lock;
     60 
     61 static int
     62 i915drmkms_init(void)
     63 {
     64 	int error;
     65 
     66 	error = drm_guarantee_initialized();
     67 	if (error)
     68 		return error;
     69 
     70 	/* XXX errno Linux->NetBSD */
     71 	error = -i915_globals_init();
     72 	if (error)
     73 		return error;
     74 
     75 	drm_sysctl_init(&i915_def);
     76 	spin_lock_init(&mchdev_lock);
     77 	spin_lock_init(&i915_sw_fence_lock);
     78 	spin_lock_init(i915_schedule_lock);
     79 
     80 	return 0;
     81 }
     82 
     83 int	i915drmkms_guarantee_initialized(void); /* XXX */
     84 int
     85 i915drmkms_guarantee_initialized(void)
     86 {
     87 #ifdef _MODULE
     88 	return 0;
     89 #else
     90 	static ONCE_DECL(i915drmkms_init_once);
     91 
     92 	return RUN_ONCE(&i915drmkms_init_once, &i915drmkms_init);
     93 #endif
     94 }
     95 
     96 static void
     97 i915drmkms_fini(void)
     98 {
     99 
    100 	spin_lock_destroy(i915_schedule_lock);
    101 	spin_lock_destroy(&i915_sw_fence_lock);
    102 	spin_lock_destroy(&mchdev_lock);
    103 	drm_sysctl_fini(&i915_def);
    104 
    105 	i915_globals_exit();
    106 }
    107 
    108 static int
    109 i915drmkms_modcmd(modcmd_t cmd, void *arg __unused)
    110 {
    111 	int error;
    112 
    113 	switch (cmd) {
    114 	case MODULE_CMD_INIT:
    115 		/* XXX Kludge it up...  Must happen before attachment.  */
    116 #ifdef _MODULE
    117 		error = i915drmkms_init();
    118 #else
    119 		error = i915drmkms_guarantee_initialized();
    120 #endif
    121 		if (error) {
    122 			aprint_error("i915drmkms: failed to initialize: %d\n",
    123 			    error);
    124 			return error;
    125 		}
    126 #ifdef _MODULE
    127 		error = config_init_component(cfdriver_ioconf_i915drmkms,
    128 		    cfattach_ioconf_i915drmkms, cfdata_ioconf_i915drmkms);
    129 		if (error) {
    130 			aprint_error("i915drmkms: failed to init component"
    131 			    ": %d\n", error);
    132 			i915drmkms_fini();
    133 			return error;
    134 		}
    135 #endif
    136 		return 0;
    137 
    138 	case MODULE_CMD_FINI:
    139 #ifdef _MODULE
    140 		error = config_fini_component(cfdriver_ioconf_i915drmkms,
    141 		    cfattach_ioconf_i915drmkms, cfdata_ioconf_i915drmkms);
    142 		if (error) {
    143 			aprint_error("i915drmkms: failed to fini component"
    144 			    ": %d\n", error);
    145 			return error;
    146 		}
    147 #endif
    148 		i915drmkms_fini();
    149 		return 0;
    150 
    151 	default:
    152 		return ENOTTY;
    153 	}
    154 }
    155