1 /* $NetBSD: intelfb.c,v 1.25 2023/05/22 22:36:53 nat Exp $ */
2
3 /*-
4 * Copyright (c) 2014 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: intelfb.c,v 1.25 2023/05/22 22:36:53 nat Exp $");
34
35 #include <sys/types.h>
36 #include <sys/bus.h>
37 #include <sys/device.h>
38
39 #include <drm/drm_device.h>
40 #include <drm/drmfb.h>
41 #include <drm/drmfb_pci.h>
42
43 #include "display/intel_display_types.h"
44 #include "display/intel_vga.h"
45 #include "i915_drv.h"
46 #include "i915_pci.h"
47 #include "intelfb.h"
48
49 static int intelfb_match(device_t, cfdata_t, void *);
50 static void intelfb_attach(device_t, device_t, void *);
51 static int intelfb_detach(device_t, int);
52
53 static void intelfb_attach_task(struct i915drmkms_task *);
54
55 static bool intelfb_shutdown(device_t, int);
56
57 static paddr_t intelfb_drmfb_mmapfb(struct drmfb_softc *, off_t, int);
58
59 static void intelfb_disable_vga(struct drm_device *);
60
61 struct intelfb_softc {
62 struct drmfb_softc sc_drmfb; /* XXX Must be first. */
63 device_t sc_dev;
64 struct intelfb_attach_args sc_ifa;
65 bus_space_handle_t sc_fb_bsh;
66 struct i915drmkms_task sc_attach_task;
67 bool sc_attached:1;
68 };
69
70 static const struct drmfb_params intelfb_drmfb_params = {
71 .dp_mmapfb = intelfb_drmfb_mmapfb,
72 .dp_mmap = drmfb_pci_mmap,
73 .dp_ioctl = drmfb_pci_ioctl,
74 .dp_is_vga_console = drmfb_pci_is_vga_console,
75 .dp_disable_vga = intelfb_disable_vga,
76 };
77
78 CFATTACH_DECL_NEW(intelfb, sizeof(struct intelfb_softc),
79 intelfb_match, intelfb_attach, intelfb_detach, NULL);
80
81 static int
intelfb_match(device_t parent,cfdata_t match,void * aux)82 intelfb_match(device_t parent, cfdata_t match, void *aux)
83 {
84
85 return 1;
86 }
87
88 static void
intelfb_attach(device_t parent,device_t self,void * aux)89 intelfb_attach(device_t parent, device_t self, void *aux)
90 {
91 struct intelfb_softc *const sc = device_private(self);
92 const struct intelfb_attach_args *const ifa = aux;
93
94 sc->sc_dev = self;
95 sc->sc_ifa = *ifa;
96 sc->sc_attached = false;
97
98 aprint_naive("\n");
99 aprint_normal("\n");
100
101 i915drmkms_task_init(&sc->sc_attach_task, &intelfb_attach_task);
102 i915drmkms_task_schedule(parent, &sc->sc_attach_task);
103 config_pending_incr(self);
104 }
105
106 static int
intelfb_detach(device_t self,int flags)107 intelfb_detach(device_t self, int flags)
108 {
109 struct intelfb_softc *const sc = device_private(self);
110 int error;
111
112 if (sc->sc_attached) {
113 pmf_device_deregister(self);
114 error = drmfb_detach(&sc->sc_drmfb, flags);
115 if (error) {
116 /* XXX Ugh. */
117 (void)pmf_device_register1(self, NULL, NULL,
118 &intelfb_shutdown);
119 return error;
120 }
121 sc->sc_attached = false;
122 }
123
124 return 0;
125 }
126
127 static void
intelfb_attach_task(struct i915drmkms_task * task)128 intelfb_attach_task(struct i915drmkms_task *task)
129 {
130 struct intelfb_softc *const sc = container_of(task,
131 struct intelfb_softc, sc_attach_task);
132 const struct intelfb_attach_args *const ifa = &sc->sc_ifa;
133 const struct drmfb_attach_args da = {
134 .da_dev = sc->sc_dev,
135 .da_fb_helper = ifa->ifa_fb_helper,
136 .da_fb_sizes = &ifa->ifa_fb_sizes,
137 .da_fb_vaddr = ifa->ifa_fb_vaddr,
138 .da_fb_linebytes = ifa->ifa_fb_helper->fb->pitches[0],
139 .da_params = &intelfb_drmfb_params,
140 };
141 int error;
142
143 error = drmfb_attach(&sc->sc_drmfb, &da);
144 if (error) {
145 aprint_error_dev(sc->sc_dev, "failed to attach drmfb: %d\n",
146 error);
147 goto out;
148 }
149
150 if (!pmf_device_register1(sc->sc_dev, NULL, NULL, &intelfb_shutdown))
151 aprint_error_dev(sc->sc_dev,
152 "failed to register shutdown handler\n");
153
154 sc->sc_attached = true;
155 out:
156 config_pending_decr(sc->sc_dev);
157 }
158
159 static bool
intelfb_shutdown(device_t self,int flags)160 intelfb_shutdown(device_t self, int flags)
161 {
162 struct intelfb_softc *const sc = device_private(self);
163
164 return drmfb_shutdown(&sc->sc_drmfb, flags);
165 }
166
167 static paddr_t
intelfb_drmfb_mmapfb(struct drmfb_softc * drmfb,off_t offset,int prot)168 intelfb_drmfb_mmapfb(struct drmfb_softc *drmfb, off_t offset, int prot)
169 {
170 struct intelfb_softc *const sc = container_of(drmfb,
171 struct intelfb_softc, sc_drmfb);
172 struct drm_fb_helper *const helper = sc->sc_ifa.ifa_fb_helper;
173 struct intel_fbdev *const fbdev = container_of(helper,
174 struct intel_fbdev, helper);
175 struct drm_device *const dev = helper->dev;
176 struct drm_i915_private *const i915 =
177 container_of(dev, struct drm_i915_private, drm);
178 struct i915_ggtt *const ggtt = &i915->ggtt;
179 struct i915_vma *const vma = fbdev->vma;
180
181 KASSERT(0 <= offset);
182 KASSERT(offset < vma->node.size);
183
184 return bus_space_mmap(dev->bst, ggtt->gmadr.start,
185 vma->node.start + offset, prot, BUS_SPACE_MAP_PREFETCHABLE);
186 }
187
188 static void
intelfb_disable_vga(struct drm_device * dev)189 intelfb_disable_vga(struct drm_device *dev)
190 {
191 struct drm_i915_private *i915 =
192 container_of(dev, struct drm_i915_private, drm);
193
194 intel_vga_disable(i915);
195 }
196