1 /* $NetBSD: via_pci.c,v 1.7 2021/12/19 12:30:23 riastradh 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: via_pci.c,v 1.7 2021/12/19 12:30:23 riastradh Exp $");
34
35 #include <sys/types.h>
36 #include <sys/device.h>
37 #include <sys/pmf.h>
38 #include <sys/systm.h>
39
40 #include <linux/pci.h>
41
42 #include <drm/drm_device.h>
43 #include <drm/drm_drv.h>
44 #include <drm/drm_pci.h>
45 #include <drm/drm_pciids.h>
46 #include <drm/via_drm.h>
47
48 #include "via_drv.h"
49
50 struct drm_device;
51
52 struct viadrm_softc {
53 device_t sc_dev;
54 struct pci_dev sc_pci_dev;
55 struct drm_device *sc_drm_dev;
56 bool sc_pci_attached;
57 bool sc_dev_registered;
58 };
59
60 static int viadrm_match(device_t, cfdata_t, void *);
61 static void viadrm_attach(device_t, device_t, void *);
62 static int viadrm_detach(device_t, int);
63
64 extern struct drm_driver *const via_drm_driver; /* XXX */
65
66 CFATTACH_DECL_NEW(viadrmums, sizeof(struct viadrm_softc),
67 viadrm_match, viadrm_attach, viadrm_detach, NULL);
68
69 static const struct pci_device_id viadrm_pci_ids[] = {
70 viadrv_PCI_IDS
71 };
72
73 static const unsigned long *
viadrm_lookup(const struct pci_attach_args * pa)74 viadrm_lookup(const struct pci_attach_args *pa)
75 {
76 unsigned i;
77
78 for (i = 0; i < __arraycount(viadrm_pci_ids); i++) {
79 if (viadrm_pci_ids[i].vendor == 0 &&
80 viadrm_pci_ids[i].device == 0)
81 break;
82 KASSERT(viadrm_pci_ids[i].subvendor == PCI_ANY_ID);
83 KASSERT(viadrm_pci_ids[i].subdevice == PCI_ANY_ID);
84 KASSERT(viadrm_pci_ids[i].class == 0);
85 KASSERT(viadrm_pci_ids[i].class_mask == 0);
86 if (PCI_VENDOR(pa->pa_id) != viadrm_pci_ids[i].vendor)
87 continue;
88 if (PCI_PRODUCT(pa->pa_id) != viadrm_pci_ids[i].device)
89 continue;
90 return &viadrm_pci_ids[i].driver_data;
91 }
92
93 return NULL;
94 }
95
96 static int
viadrm_match(device_t parent,cfdata_t match,void * aux)97 viadrm_match(device_t parent, cfdata_t match, void *aux)
98 {
99 extern int viadrm_guarantee_initialized(void);
100 const struct pci_attach_args *const pa = aux;
101 int error;
102
103 error = viadrm_guarantee_initialized();
104 if (error) {
105 aprint_error("viadrm: failed to initialize: %d\n", error);
106 return 0;
107 }
108
109 if (viadrm_lookup(pa) == NULL)
110 return 0;
111
112 return 1;
113 }
114
115 static void
viadrm_attach(device_t parent,device_t self,void * aux)116 viadrm_attach(device_t parent, device_t self, void *aux)
117 {
118 struct viadrm_softc *const sc = device_private(self);
119 const struct pci_attach_args *const pa = aux;
120 const unsigned long *const cookiep = viadrm_lookup(pa);
121 int error;
122
123 KASSERT(cookiep != NULL);
124
125 aprint_naive("\n");
126 aprint_normal("\n");
127
128 /* Initialize the Linux PCI device descriptor. */
129 linux_pci_dev_init(&sc->sc_pci_dev, self, device_parent(self), pa, 0);
130
131 sc->sc_drm_dev = drm_dev_alloc(via_drm_driver, self);
132 if (IS_ERR(sc->sc_drm_dev)) {
133 aprint_error_dev(self, "unable to create drm device: %ld\n",
134 PTR_ERR(sc->sc_drm_dev));
135 sc->sc_drm_dev = NULL;
136 return;
137 }
138
139 /* XXX errno Linux->NetBSD */
140 error = -drm_pci_attach(sc->sc_drm_dev, &sc->sc_pci_dev);
141 if (error) {
142 aprint_error_dev(self, "unable to attach drm: %d\n", error);
143 return;
144 }
145 sc->sc_pci_attached = true;
146
147 /* XXX errno Linux->NetBSD */
148 error = -drm_dev_register(sc->sc_drm_dev, *cookiep);
149 if (error) {
150 aprint_error_dev(self, "unable to register drm: %d\n", error);
151 return;
152 }
153 sc->sc_dev_registered = true;
154
155 if (!pmf_device_register(self, NULL, NULL))
156 aprint_error_dev(self, "couldn't establish power handler\n");
157 }
158
159 static int
viadrm_detach(device_t self,int flags)160 viadrm_detach(device_t self, int flags)
161 {
162 struct viadrm_softc *const sc = device_private(self);
163 int error;
164
165 error = config_detach_children(self, flags);
166 if (error)
167 return error;
168
169 pmf_device_deregister(self);
170 if (sc->sc_dev_registered) {
171 drm_dev_unregister(sc->sc_drm_dev);
172 sc->sc_dev_registered = false;
173 }
174 if (sc->sc_pci_attached) {
175 drm_pci_detach(sc->sc_drm_dev);
176 sc->sc_pci_attached = false;
177 }
178 if (sc->sc_drm_dev) {
179 drm_dev_put(sc->sc_drm_dev);
180 sc->sc_drm_dev = NULL;
181 }
182 linux_pci_dev_destroy(&sc->sc_pci_dev);
183
184 return 0;
185 }
186