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i915_module.c revision 1.5 
      1 /*	$NetBSD: i915_module.c,v 1.5 2014/11/12 03:14:00 christos 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 1.5 2014/11/12 03:14:00 christos 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/drmP.h>
     43 #include <drm/drm_sysctl.h>
     44 
     45 #include "i915_drv.h"
     46 
     47 MODULE(MODULE_CLASS_DRIVER, i915drmkms, "drmkms,drmkms_pci"); /* XXX drmkms_i2c */
     48 
     49 #ifdef _MODULE
     50 #include "ioconf.c"
     51 #endif
     52 
     53 /* XXX Kludge to get these from i915_drv.c.  */
     54 extern struct drm_driver *const i915_drm_driver;
     55 extern const struct pci_device_id *const i915_device_ids;
     56 extern const size_t i915_n_device_ids;
     57 
     58 struct drm_sysctl_def i915_def = DRM_SYSCTL_INIT();
     59 
     60 static int
     61 i915drmkms_init(void)
     62 {
     63 	extern int drm_guarantee_initialized(void);
     64 	int error;
     65 
     66 	error = drm_guarantee_initialized();
     67 	if (error)
     68 		return error;
     69 
     70 	i915_drm_driver->num_ioctls = i915_max_ioctl;
     71 	i915_drm_driver->driver_features |= DRIVER_MODESET;
     72 	i915_drm_driver->driver_features &= ~DRIVER_USE_AGP;
     73 
     74 	error = drm_pci_init(i915_drm_driver, NULL);
     75 	if (error) {
     76 		aprint_error("i915drmkms: failed to init pci: %d\n",
     77 		    error);
     78 		return error;
     79 	}
     80 	drm_sysctl_init(&i915_def);
     81 
     82 	return 0;
     83 }
     84 
     85 int	i915drmkms_guarantee_initialized(void); /* XXX */
     86 int
     87 i915drmkms_guarantee_initialized(void)
     88 {
     89 #ifdef _MODULE
     90 	return 0;
     91 #else
     92 	static ONCE_DECL(i915drmkms_init_once);
     93 
     94 	return RUN_ONCE(&i915drmkms_init_once, &i915drmkms_init);
     95 #endif
     96 }
     97 
     98 static void
     99 i915drmkms_fini(void)
    100 {
    101 
    102 	drm_pci_exit(i915_drm_driver, NULL);
    103 	drm_sysctl_fini(&i915_def);
    104 }
    105 
    106 static int
    107 i915drmkms_modcmd(modcmd_t cmd, void *arg __unused)
    108 {
    109 	int error;
    110 
    111 	switch (cmd) {
    112 	case MODULE_CMD_INIT:
    113 		/* XXX Kludge it up...  Must happen before attachment.  */
    114 #ifdef _MODULE
    115 		error = i915drmkms_init();
    116 #else
    117 		error = i915drmkms_guarantee_initialized();
    118 #endif
    119 		if (error) {
    120 			aprint_error("i915drmkms: failed to initialize: %d\n",
    121 			    error);
    122 			return error;
    123 		}
    124 #ifdef _MODULE
    125 		error = config_init_component(cfdriver_ioconf_i915drmkms,
    126 		    cfattach_ioconf_i915drmkms, cfdata_ioconf_i915drmkms);
    127 		if (error) {
    128 			aprint_error("i915drmkms: failed to init component"
    129 			    ": %d\n", error);
    130 			i915drmkms_fini();
    131 			return error;
    132 		}
    133 #endif
    134 		return 0;
    135 
    136 	case MODULE_CMD_FINI:
    137 #ifdef _MODULE
    138 		error = config_fini_component(cfdriver_ioconf_i915drmkms,
    139 		    cfattach_ioconf_i915drmkms, cfdata_ioconf_i915drmkms);
    140 		if (error) {
    141 			aprint_error("i915drmkms: failed to fini component"
    142 			    ": %d\n", error);
    143 			return error;
    144 		}
    145 #endif
    146 		i915drmkms_fini();
    147 		return 0;
    148 
    149 	default:
    150 		return ENOTTY;
    151 	}
    152 }
    153