1 /* $NetBSD: via_pci.c,v 1.5 2021/02/13 15:42:15 jakllsch 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 1.5 2021/02/13 15:42:15 jakllsch 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/drmP.h> 43 #include <drm/drm_pciids.h> 44 #include <drm/via_drm.h> 45 46 #include "via_drv.h" 47 48 struct viadrm_softc { 49 device_t sc_dev; 50 struct pci_dev sc_pci_dev; 51 struct drm_device *sc_drm_dev; 52 }; 53 54 static int viadrm_match(device_t, cfdata_t, void *); 55 static void viadrm_attach(device_t, device_t, void *); 56 static int viadrm_detach(device_t, int); 57 58 extern struct drm_driver *const via_drm_driver; /* XXX */ 59 60 CFATTACH_DECL_NEW(viadrmums, sizeof(struct viadrm_softc), 61 viadrm_match, viadrm_attach, viadrm_detach, NULL); 62 63 static const struct pci_device_id viadrm_pci_ids[] = { 64 viadrv_PCI_IDS 65 }; 66 67 static const unsigned long * 68 viadrm_lookup(const struct pci_attach_args *pa) 69 { 70 unsigned i; 71 72 for (i = 0; i < __arraycount(viadrm_pci_ids); i++) { 73 if (viadrm_pci_ids[i].vendor == 0 && 74 viadrm_pci_ids[i].device == 0) 75 break; 76 KASSERT(viadrm_pci_ids[i].subvendor == PCI_ANY_ID); 77 KASSERT(viadrm_pci_ids[i].subdevice == PCI_ANY_ID); 78 KASSERT(viadrm_pci_ids[i].class == 0); 79 KASSERT(viadrm_pci_ids[i].class_mask == 0); 80 if (PCI_VENDOR(pa->pa_id) != viadrm_pci_ids[i].vendor) 81 continue; 82 if (PCI_PRODUCT(pa->pa_id) != viadrm_pci_ids[i].device) 83 continue; 84 return &viadrm_pci_ids[i].driver_data; 85 } 86 87 return NULL; 88 } 89 90 static int 91 viadrm_match(device_t parent, cfdata_t match, void *aux) 92 { 93 extern int viadrm_guarantee_initialized(void); 94 const struct pci_attach_args *const pa = aux; 95 int error; 96 97 error = viadrm_guarantee_initialized(); 98 if (error) { 99 aprint_error("viadrm: failed to initialize: %d\n", error); 100 return 0; 101 } 102 103 if (viadrm_lookup(pa) == NULL) 104 return 0; 105 106 return 1; 107 } 108 109 static void 110 viadrm_attach(device_t parent, device_t self, void *aux) 111 { 112 struct viadrm_softc *const sc = device_private(self); 113 const struct pci_attach_args *const pa = aux; 114 const unsigned long *const cookiep = viadrm_lookup(pa); 115 int error; 116 117 KASSERT(cookiep != NULL); 118 119 aprint_naive("\n"); 120 aprint_normal("\n"); 121 122 if (!pmf_device_register(self, NULL, NULL)) 123 aprint_error_dev(self, "couldn't establish power handler\n"); 124 125 /* Initialize the Linux PCI device descriptor. */ 126 linux_pci_dev_init(&sc->sc_pci_dev, self, device_parent(self), pa, 0); 127 128 /* XXX errno Linux->NetBSD */ 129 error = -drm_pci_attach(self, pa, &sc->sc_pci_dev, via_drm_driver, 130 *cookiep, &sc->sc_drm_dev); 131 if (error) { 132 aprint_error_dev(self, "unable to attach drm: %d\n", error); 133 return; 134 } 135 } 136 137 static int 138 viadrm_detach(device_t self, int flags) 139 { 140 struct viadrm_softc *const sc = device_private(self); 141 int error; 142 143 error = config_detach_children(self, flags); 144 if (error) 145 return error; 146 if (sc->sc_drm_dev == NULL) 147 goto out; 148 /* XXX errno Linux->NetBSD */ 149 error = -drm_pci_detach(sc->sc_drm_dev, flags); 150 if (error) 151 return error; 152 sc->sc_drm_dev = NULL; 153 154 out: linux_pci_dev_destroy(&sc->sc_pci_dev); 155 pmf_device_deregister(self); 156 return 0; 157 } 158