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 * 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 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 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 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
Indexes created Thu Oct 02 14:10:14 GMT 2025