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      1 /*	$NetBSD: vmwgfx_module.c,v 1.2 2022/07/17 15:37:10 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2022 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: vmwgfx_module.c,v 1.2 2022/07/17 15:37:10 riastradh Exp $");
     31 
     32 #include <sys/types.h>
     33 #include <sys/module.h>
     34 #ifndef _MODULE
     35 #include <sys/once.h>
     36 #endif
     37 #include <sys/systm.h>
     38 
     39 #include <drm/drm_device.h>
     40 #include <drm/drm_drv.h>
     41 #include <drm/drm_sysctl.h>
     42 
     43 #include "vmwgfx_drv.h"
     44 
     45 MODULE(MODULE_CLASS_DRIVER, vmwgfx, "drmkms,drmkms_pci,drmkms_ttm"); /* XXX drmkms_i2c */
     46 
     47 #ifdef _MODULE
     48 #include "ioconf.c"
     49 #endif
     50 
     51 struct drm_sysctl_def vmwgfx_def = DRM_SYSCTL_INIT();
     52 
     53 static int
     54 vmwgfx_init(void)
     55 {
     56 	int error;
     57 
     58 	error = drm_guarantee_initialized();
     59 	if (error)
     60 		return error;
     61 
     62 	drm_sysctl_init(&vmwgfx_def);
     63 
     64 	return 0;
     65 }
     66 
     67 int	vmwgfx_guarantee_initialized(void); /* XXX */
     68 int
     69 vmwgfx_guarantee_initialized(void)
     70 {
     71 #ifdef _MODULE
     72 	return 0;
     73 #else
     74 	static ONCE_DECL(vmwgfx_init_once);
     75 
     76 	return RUN_ONCE(&vmwgfx_init_once, &vmwgfx_init);
     77 #endif
     78 }
     79 
     80 static void
     81 vmwgfx_fini(void)
     82 {
     83 
     84 	drm_sysctl_fini(&vmwgfx_def);
     85 }
     86 
     87 static int
     88 vmwgfx_modcmd(modcmd_t cmd, void *arg __unused)
     89 {
     90 	int error;
     91 
     92 	switch (cmd) {
     93 	case MODULE_CMD_INIT:
     94 		/* XXX Kludge it up...  Must happen before attachment.  */
     95 #ifdef _MODULE
     96 		error = vmwgfx_init();
     97 #else
     98 		error = vmwgfx_guarantee_initialized();
     99 #endif
    100 		if (error) {
    101 			aprint_error("vmwgfx: failed to initialize: %d\n",
    102 			    error);
    103 			return error;
    104 		}
    105 #ifdef _MODULE
    106 		error = config_init_component(cfdriver_ioconf_vmwgfx,
    107 		    cfattach_ioconf_vmwgfx, cfdata_ioconf_vmwgfx);
    108 		if (error) {
    109 			aprint_error("vmwgfx: failed to init component"
    110 			    ": %d\n", error);
    111 			vmwgfx_fini();
    112 			return error;
    113 		}
    114 #endif
    115 		return 0;
    116 
    117 	case MODULE_CMD_FINI:
    118 #ifdef _MODULE
    119 		error = config_fini_component(cfdriver_ioconf_vmwgfx,
    120 		    cfattach_ioconf_vmwgfx, cfdata_ioconf_vmwgfx);
    121 		if (error) {
    122 			aprint_error("vmwgfx: failed to fini component"
    123 			    ": %d\n", error);
    124 			return error;
    125 		}
    126 #endif
    127 		vmwgfx_fini();
    128 		return 0;
    129 
    130 	default:
    131 		return ENOTTY;
    132 	}
    133 }
    134