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 | |
50 | static int nouveaufb_match(device_t, cfdata_t, void *); |
51 | static void nouveaufb_attach(device_t, device_t, void *); |
52 | static int nouveaufb_detach(device_t, int); |
53 | |
54 | static void nouveaufb_attach_task(struct nouveau_pci_task *); |
55 | |
56 | static bool nouveaufb_shutdown(device_t, int); |
57 | static paddr_t nouveaufb_drmfb_mmapfb(struct drmfb_softc *, off_t, int); |
58 | |
59 | struct 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 | |
68 | static 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 | |
75 | CFATTACH_DECL_NEW(nouveaufb, sizeof(struct nouveaufb_softc), |
76 | nouveaufb_match, nouveaufb_attach, nouveaufb_detach, NULL); |
77 | |
78 | static int |
79 | nouveaufb_match(device_t parent, cfdata_t match, void *aux) |
80 | { |
81 | |
82 | return 1; |
83 | } |
84 | |
85 | static void |
86 | nouveaufb_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 | |
112 | fail0: return; |
113 | } |
114 | |
115 | static int |
116 | nouveaufb_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 | |
139 | static void |
140 | nouveaufb_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 | |
168 | static bool |
169 | nouveaufb_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 | |
176 | static paddr_t |
177 | nouveaufb_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 | |