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
50struct drm_device;
51
52struct 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
60static int	viadrm_match(device_t, cfdata_t, void *);
61static void	viadrm_attach(device_t, device_t, void *);
62static int	viadrm_detach(device_t, int);
63
64extern struct drm_driver *const via_drm_driver; /* XXX */
65
66CFATTACH_DECL_NEW(viadrmums, sizeof(struct viadrm_softc),
67    viadrm_match, viadrm_attach, viadrm_detach, NULL);
68
69static const struct pci_device_id viadrm_pci_ids[] = {
70	viadrv_PCI_IDS
71};
72
73static const unsigned long *
74viadrm_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
96static int
97viadrm_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
115static void
116viadrm_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
159static int
160viadrm_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