1 /* $NetBSD: intelfb.c,v 1.25 2023/05/22 22:36:53 nat Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 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: intelfb.c,v 1.25 2023/05/22 22:36:53 nat Exp $"); 34 35 #include <sys/types.h> 36 #include <sys/bus.h> 37 #include <sys/device.h> 38 39 #include <drm/drm_device.h> 40 #include <drm/drmfb.h> 41 #include <drm/drmfb_pci.h> 42 43 #include "display/intel_display_types.h" 44 #include "display/intel_vga.h" 45 #include "i915_drv.h" 46 #include "i915_pci.h" 47 #include "intelfb.h" 48 49 static int intelfb_match(device_t, cfdata_t, void *); 50 static void intelfb_attach(device_t, device_t, void *); 51 static int intelfb_detach(device_t, int); 52 53 static void intelfb_attach_task(struct i915drmkms_task *); 54 55 static bool intelfb_shutdown(device_t, int); 56 57 static paddr_t intelfb_drmfb_mmapfb(struct drmfb_softc *, off_t, int); 58 59 static void intelfb_disable_vga(struct drm_device *); 60 61 struct intelfb_softc { 62 struct drmfb_softc sc_drmfb; /* XXX Must be first. */ 63 device_t sc_dev; 64 struct intelfb_attach_args sc_ifa; 65 bus_space_handle_t sc_fb_bsh; 66 struct i915drmkms_task sc_attach_task; 67 bool sc_attached:1; 68 }; 69 70 static const struct drmfb_params intelfb_drmfb_params = { 71 .dp_mmapfb = intelfb_drmfb_mmapfb, 72 .dp_mmap = drmfb_pci_mmap, 73 .dp_ioctl = drmfb_pci_ioctl, 74 .dp_is_vga_console = drmfb_pci_is_vga_console, 75 .dp_disable_vga = intelfb_disable_vga, 76 }; 77 78 CFATTACH_DECL_NEW(intelfb, sizeof(struct intelfb_softc), 79 intelfb_match, intelfb_attach, intelfb_detach, NULL); 80 81 static int 82 intelfb_match(device_t parent, cfdata_t match, void *aux) 83 { 84 85 return 1; 86 } 87 88 static void 89 intelfb_attach(device_t parent, device_t self, void *aux) 90 { 91 struct intelfb_softc *const sc = device_private(self); 92 const struct intelfb_attach_args *const ifa = aux; 93 94 sc->sc_dev = self; 95 sc->sc_ifa = *ifa; 96 sc->sc_attached = false; 97 98 aprint_naive("\n"); 99 aprint_normal("\n"); 100 101 i915drmkms_task_init(&sc->sc_attach_task, &intelfb_attach_task); 102 i915drmkms_task_schedule(parent, &sc->sc_attach_task); 103 config_pending_incr(self); 104 } 105 106 static int 107 intelfb_detach(device_t self, int flags) 108 { 109 struct intelfb_softc *const sc = device_private(self); 110 int error; 111 112 if (sc->sc_attached) { 113 pmf_device_deregister(self); 114 error = drmfb_detach(&sc->sc_drmfb, flags); 115 if (error) { 116 /* XXX Ugh. */ 117 (void)pmf_device_register1(self, NULL, NULL, 118 &intelfb_shutdown); 119 return error; 120 } 121 sc->sc_attached = false; 122 } 123 124 return 0; 125 } 126 127 static void 128 intelfb_attach_task(struct i915drmkms_task *task) 129 { 130 struct intelfb_softc *const sc = container_of(task, 131 struct intelfb_softc, sc_attach_task); 132 const struct intelfb_attach_args *const ifa = &sc->sc_ifa; 133 const struct drmfb_attach_args da = { 134 .da_dev = sc->sc_dev, 135 .da_fb_helper = ifa->ifa_fb_helper, 136 .da_fb_sizes = &ifa->ifa_fb_sizes, 137 .da_fb_vaddr = ifa->ifa_fb_vaddr, 138 .da_fb_linebytes = ifa->ifa_fb_helper->fb->pitches[0], 139 .da_params = &intelfb_drmfb_params, 140 }; 141 int error; 142 143 error = drmfb_attach(&sc->sc_drmfb, &da); 144 if (error) { 145 aprint_error_dev(sc->sc_dev, "failed to attach drmfb: %d\n", 146 error); 147 goto out; 148 } 149 150 if (!pmf_device_register1(sc->sc_dev, NULL, NULL, &intelfb_shutdown)) 151 aprint_error_dev(sc->sc_dev, 152 "failed to register shutdown handler\n"); 153 154 sc->sc_attached = true; 155 out: 156 config_pending_decr(sc->sc_dev); 157 } 158 159 static bool 160 intelfb_shutdown(device_t self, int flags) 161 { 162 struct intelfb_softc *const sc = device_private(self); 163 164 return drmfb_shutdown(&sc->sc_drmfb, flags); 165 } 166 167 static paddr_t 168 intelfb_drmfb_mmapfb(struct drmfb_softc *drmfb, off_t offset, int prot) 169 { 170 struct intelfb_softc *const sc = container_of(drmfb, 171 struct intelfb_softc, sc_drmfb); 172 struct drm_fb_helper *const helper = sc->sc_ifa.ifa_fb_helper; 173 struct intel_fbdev *const fbdev = container_of(helper, 174 struct intel_fbdev, helper); 175 struct drm_device *const dev = helper->dev; 176 struct drm_i915_private *const i915 = 177 container_of(dev, struct drm_i915_private, drm); 178 struct i915_ggtt *const ggtt = &i915->ggtt; 179 struct i915_vma *const vma = fbdev->vma; 180 181 KASSERT(0 <= offset); 182 KASSERT(offset < vma->node.size); 183 184 return bus_space_mmap(dev->bst, ggtt->gmadr.start, 185 vma->node.start + offset, prot, BUS_SPACE_MAP_PREFETCHABLE); 186 } 187 188 static void 189 intelfb_disable_vga(struct drm_device *dev) 190 { 191 struct drm_i915_private *i915 = 192 container_of(dev, struct drm_i915_private, drm); 193 194 intel_vga_disable(i915); 195 } 196
Indexes created Sun Sep 21 14:09:52 GMT 2025