1 /* $NetBSD: vmwgfxfb.c,v 1.4 2022/09/25 08:21:02 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
30 #include <sys/cdefs.h>
31 __KERNEL_RCSID(0, "$NetBSD: vmwgfxfb.c,v 1.4 2022/09/25 08:21:02 riastradh Exp $");
32
33 #include <sys/types.h>
34 #include <sys/device.h>
35
36 #include <drm/drm_fb_helper.h>
37 #include <drm/drmfb.h>
38 #include <drm/drmfb_pci.h>
39
40 #include "vmwgfx_drv.h"
41 #include "vmwgfx_task.h"
42 #include "vmwgfxfb.h"
43
44 struct vmwgfxfb_softc {
45 struct drmfb_softc sc_drmfb; /* XXX Must be first. */
46 device_t sc_dev;
47 struct vmwgfxfb_attach_args sc_vfa;
48 struct vmwgfx_task sc_attach_task;
49 bool sc_attached:1;
50 };
51
52 static int vmwgfxfb_match(device_t, cfdata_t, void *);
53 static void vmwgfxfb_attach(device_t, device_t, void *);
54 static int vmwgfxfb_detach(device_t, int);
55
56 static void vmwgfxfb_attach_task(struct vmwgfx_task *);
57
58 static paddr_t vmwgfxfb_drmfb_mmapfb(struct drmfb_softc *, off_t, int);
59 static bool vmwgfxfb_shutdown(device_t, int);
60
61 CFATTACH_DECL_NEW(vmwgfxfb, sizeof(struct vmwgfxfb_softc),
62 vmwgfxfb_match, vmwgfxfb_attach, vmwgfxfb_detach, NULL);
63
64 static const struct drmfb_params vmwgfxfb_drmfb_params = {
65 .dp_mmapfb = vmwgfxfb_drmfb_mmapfb,
66 .dp_mmap = drmfb_pci_mmap,
67 .dp_ioctl = drmfb_pci_ioctl,
68 .dp_is_vga_console = drmfb_pci_is_vga_console,
69 };
70
71 static int
vmwgfxfb_match(device_t parent,cfdata_t match,void * aux)72 vmwgfxfb_match(device_t parent, cfdata_t match, void *aux)
73 {
74
75 return 1;
76 }
77
78 static void
vmwgfxfb_attach(device_t parent,device_t self,void * aux)79 vmwgfxfb_attach(device_t parent, device_t self, void *aux)
80 {
81 struct vmwgfxfb_softc *const sc = device_private(self);
82 const struct vmwgfxfb_attach_args *const vfa = aux;
83
84 sc->sc_dev = self;
85 sc->sc_vfa = *vfa;
86 sc->sc_attached = false;
87
88 aprint_naive("\n");
89 aprint_normal("\n");
90
91 vmwgfx_task_init(&sc->sc_attach_task, &vmwgfxfb_attach_task);
92 vmwgfx_task_schedule(parent, &sc->sc_attach_task);
93 config_pending_incr(self);
94 }
95
96 static int
vmwgfxfb_detach(device_t self,int flags)97 vmwgfxfb_detach(device_t self, int flags)
98 {
99 struct vmwgfxfb_softc *const sc = device_private(self);
100 int error;
101
102 if (sc->sc_attached) {
103 pmf_device_deregister(self);
104 error = drmfb_detach(&sc->sc_drmfb, flags);
105 if (error) {
106 /* XXX Ugh. */
107 (void)pmf_device_register1(self, NULL, NULL,
108 &vmwgfxfb_shutdown);
109 return error;
110 }
111 sc->sc_attached = false;
112 }
113
114 return 0;
115 }
116
117 static void
vmwgfxfb_attach_task(struct vmwgfx_task * task)118 vmwgfxfb_attach_task(struct vmwgfx_task *task)
119 {
120 struct vmwgfxfb_softc *const sc = container_of(task,
121 struct vmwgfxfb_softc, sc_attach_task);
122 const struct vmwgfxfb_attach_args *const vfa = &sc->sc_vfa;
123 const struct drmfb_attach_args da = {
124 .da_dev = sc->sc_dev,
125 .da_fb_helper = vfa->vfa_fb_helper,
126 .da_fb_sizes = &vfa->vfa_fb_sizes,
127 .da_fb_vaddr = __UNVOLATILE(vfa->vfa_fb_ptr),
128 .da_fb_linebytes = vfa->vfa_fb_linebytes,
129 .da_params = &vmwgfxfb_drmfb_params,
130 };
131 int error;
132
133 error = drmfb_attach(&sc->sc_drmfb, &da);
134 if (error) {
135 aprint_error_dev(sc->sc_dev, "failed to attach drmfb: %d\n",
136 error);
137 goto out;
138 }
139 if (!pmf_device_register1(sc->sc_dev, NULL, NULL, &vmwgfxfb_shutdown))
140 aprint_error_dev(sc->sc_dev,
141 "failed to register shutdown handler\n");
142
143 sc->sc_attached = true;
144 out:
145 config_pending_decr(sc->sc_dev);
146 }
147
148 static bool
vmwgfxfb_shutdown(device_t self,int flags)149 vmwgfxfb_shutdown(device_t self, int flags)
150 {
151 struct vmwgfxfb_softc *const sc = device_private(self);
152
153 return drmfb_shutdown(&sc->sc_drmfb, flags);
154 }
155
156 static paddr_t
vmwgfxfb_drmfb_mmapfb(struct drmfb_softc * drmfb,off_t offset,int prot)157 vmwgfxfb_drmfb_mmapfb(struct drmfb_softc *drmfb, off_t offset, int prot)
158 {
159 struct vmwgfxfb_softc *const sc = container_of(drmfb,
160 struct vmwgfxfb_softc, sc_drmfb);
161 struct drm_fb_helper *const helper = sc->sc_vfa.vfa_fb_helper;
162 struct drm_framebuffer *const fb = helper->fb;
163 struct vmw_buffer_object *const vbo = /*XXX MAGIC HERE*/;
164 int flags = 0;
165
166 if (offset < 0)
167 return -1;
168
169 const unsigned num_pages __diagused = vbo->base.num_pages;
170
171 KASSERT(offset < (num_pages << PAGE_SHIFT));
172 KASSERT(vbo->base.mem.bus.is_iomem);
173
174 if (ISSET(vbo->base.mem.placement, TTM_PL_FLAG_WC))
175 flags |= BUS_SPACE_MAP_PREFETCHABLE;
176
177 return bus_space_mmap(vbo->base.bdev->memt,
178 vbo->base.mem.bus.base, vbo->base.mem.bus.offset + offset,
179 prot, flags);
180 }
181