1/* $NetBSD: nouveaufb.c,v 1.3 2015/10/17 12:02:44 jmcneill Exp $ */
2
3/*-
4 * Copyright (c) 2015 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: nouveaufb.c,v 1.3 2015/10/17 12:02:44 jmcneill Exp $");
34
35#include <sys/types.h>
36#include <sys/bus.h>
37#include <sys/device.h>
38#include <sys/errno.h>
39
40#include <drm/drmP.h>
41#include <drm/drmfb.h>
42#include <drm/drmfb_pci.h>
43
44#include "nouveau_bo.h"
45#include "nouveau_drm.h"
46#include "nouveau_fbcon.h"
47#include "nouveau_pci.h"
48#include "nouveaufb.h"
49
50static int nouveaufb_match(device_t, cfdata_t, void *);
51static void nouveaufb_attach(device_t, device_t, void *);
52static int nouveaufb_detach(device_t, int);
53
54static void nouveaufb_attach_task(struct nouveau_pci_task *);
55
56static bool nouveaufb_shutdown(device_t, int);
57static paddr_t nouveaufb_drmfb_mmapfb(struct drmfb_softc *, off_t, int);
58
59struct nouveaufb_softc {
60 struct drmfb_softc sc_drmfb; /* XXX Must be first. */
61 device_t sc_dev;
62 struct nouveaufb_attach_args sc_nfa;
63 struct nouveau_pci_task sc_attach_task;
64 bool sc_scheduled:1;
65 bool sc_attached:1;
66};
67
68static const struct drmfb_params nouveaufb_drmfb_params = {
69 .dp_mmapfb = nouveaufb_drmfb_mmapfb,
70 .dp_mmap = drmfb_pci_mmap,
71 .dp_ioctl = drmfb_pci_ioctl,
72 .dp_is_vga_console = drmfb_pci_is_vga_console,
73};
74
75CFATTACH_DECL_NEW(nouveaufb, sizeof(struct nouveaufb_softc),
76 nouveaufb_match, nouveaufb_attach, nouveaufb_detach, NULL);
77
78static int
79nouveaufb_match(device_t parent, cfdata_t match, void *aux)
80{
81
82 return 1;
83}
84
85static void
86nouveaufb_attach(device_t parent, device_t self, void *aux)
87{
88 struct nouveaufb_softc *const sc = device_private(self);
89 const struct nouveaufb_attach_args *const nfa = aux;
90 int error;
91
92 sc->sc_dev = self;
93 sc->sc_nfa = *nfa;
94 sc->sc_scheduled = false;
95 sc->sc_attached = false;
96
97 aprint_naive("\n");
98 aprint_normal("\n");
99
100 nouveau_pci_task_init(&sc->sc_attach_task, &nouveaufb_attach_task);
101 error = nouveau_pci_task_schedule(parent, &sc->sc_attach_task);
102 if (error) {
103 aprint_error_dev(self, "failed to schedule mode set: %d\n",
104 error);
105 goto fail0;
106 }
107 sc->sc_scheduled = true;
108
109 /* Success! */
110 return;
111
112fail0: return;
113}
114
115static int
116nouveaufb_detach(device_t self, int flags)
117{
118 struct nouveaufb_softc *const sc = device_private(self);
119 int error;
120
121 if (sc->sc_scheduled)
122 return EBUSY;
123
124 if (sc->sc_attached) {
125 pmf_device_deregister(self);
126 error = drmfb_detach(&sc->sc_drmfb, flags);
127 if (error) {
128 /* XXX Ugh. */
129 (void)pmf_device_register1(self, NULL, NULL,
130 &nouveaufb_shutdown);
131 return error;
132 }
133 sc->sc_attached = false;
134 }
135
136 return 0;
137}
138
139static void
140nouveaufb_attach_task(struct nouveau_pci_task *task)
141{
142 struct nouveaufb_softc *const sc = container_of(task,
143 struct nouveaufb_softc, sc_attach_task);
144 const struct nouveaufb_attach_args *const nfa = &sc->sc_nfa;
145 const struct drmfb_attach_args da = {
146 .da_dev = sc->sc_dev,
147 .da_fb_helper = nfa->nfa_fb_helper,
148 .da_fb_sizes = &nfa->nfa_fb_sizes,
149 .da_fb_vaddr = __UNVOLATILE(nfa->nfa_fb_ptr),
150 .da_params = &nouveaufb_drmfb_params,
151 };
152 int error;
153
154 error = drmfb_attach(&sc->sc_drmfb, &da);
155 if (error) {
156 aprint_error_dev(sc->sc_dev, "failed to attach drmfb: %d\n",
157 error);
158 return;
159 }
160
161 if (!pmf_device_register1(sc->sc_dev, NULL, NULL, &nouveaufb_shutdown))
162 aprint_error_dev(sc->sc_dev,
163 "failed to register shutdown handler\n");
164
165 sc->sc_attached = true;
166}
167
168static bool
169nouveaufb_shutdown(device_t self, int flags)
170{
171 struct nouveaufb_softc *const sc = device_private(self);
172
173 return drmfb_shutdown(&sc->sc_drmfb, flags);
174}
175
176static paddr_t
177nouveaufb_drmfb_mmapfb(struct drmfb_softc *drmfb, off_t offset, int prot)
178{
179 struct nouveaufb_softc *const sc = container_of(drmfb,
180 struct nouveaufb_softc, sc_drmfb);
181 struct drm_fb_helper *const helper = sc->sc_nfa.nfa_fb_helper;
182 struct nouveau_fbdev *const fbdev = container_of(helper,
183 struct nouveau_fbdev, helper);
184 struct nouveau_bo *const nvbo = fbdev->nouveau_fb.nvbo;
185 const unsigned num_pages __diagused = nvbo->bo.num_pages;
186 int flags = 0;
187
188 KASSERT(0 <= offset);
189 KASSERT(offset < (num_pages << PAGE_SHIFT));
190
191 if (ISSET(nvbo->bo.mem.placement, TTM_PL_FLAG_WC))
192 flags |= BUS_SPACE_MAP_PREFETCHABLE;
193
194 return bus_space_mmap(nvbo->bo.bdev->memt, nvbo->bo.mem.bus.base,
195 nvbo->bo.mem.bus.offset + offset, prot, flags);
196}
197