intelfb.c revision 1.19
1 /* $NetBSD: intelfb.c,v 1.19 2021/12/19 10:32:59 riastradh 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 1.19 2021/12/19 10:32:59 riastradh 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 "i915_drv.h" 44 #include "i915_pci.h" 45 #include "intel_drv.h" 46 #include "intelfb.h" 47 48 static int intelfb_match(device_t, cfdata_t, void *); 49 static void intelfb_attach(device_t, device_t, void *); 50 static int intelfb_detach(device_t, int); 51 52 static void intelfb_attach_task(struct i915drmkms_task *); 53 54 static bool intelfb_shutdown(device_t, int); 55 56 static paddr_t intelfb_drmfb_mmapfb(struct drmfb_softc *, off_t, int); 57 58 struct intelfb_softc { 59 struct drmfb_softc sc_drmfb; /* XXX Must be first. */ 60 device_t sc_dev; 61 struct intelfb_attach_args sc_ifa; 62 bus_space_handle_t sc_fb_bsh; 63 struct i915drmkms_task sc_attach_task; 64 bool sc_mapped:1; 65 bool sc_scheduled:1; 66 bool sc_attached:1; 67 }; 68 69 static const struct drmfb_params intelfb_drmfb_params = { 70 .dp_mmapfb = intelfb_drmfb_mmapfb, 71 .dp_mmap = drmfb_pci_mmap, 72 .dp_ioctl = drmfb_pci_ioctl, 73 .dp_is_vga_console = drmfb_pci_is_vga_console, 74 .dp_disable_vga = i915_disable_vga, 75 }; 76 77 CFATTACH_DECL_NEW(intelfb, sizeof(struct intelfb_softc), 78 intelfb_match, intelfb_attach, intelfb_detach, NULL); 79 80 static int 81 intelfb_match(device_t parent, cfdata_t match, void *aux) 82 { 83 84 return 1; 85 } 86 87 static void 88 intelfb_attach(device_t parent, device_t self, void *aux) 89 { 90 struct intelfb_softc *const sc = device_private(self); 91 const struct intelfb_attach_args *const ifa = aux; 92 int error; 93 94 sc->sc_dev = self; 95 sc->sc_ifa = *ifa; 96 sc->sc_mapped = false; 97 sc->sc_scheduled = false; 98 sc->sc_attached = false; 99 100 aprint_naive("\n"); 101 aprint_normal("\n"); 102 103 /* XXX Defer this too? */ 104 error = bus_space_map(ifa->ifa_fb_bst, ifa->ifa_fb_addr, 105 ifa->ifa_fb_size, 106 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_PREFETCHABLE, 107 &sc->sc_fb_bsh); 108 if (error) { 109 aprint_error_dev(self, "unable to map framebuffer: %d\n", 110 error); 111 goto fail0; 112 } 113 sc->sc_mapped = true; 114 115 i915drmkms_task_init(&sc->sc_attach_task, &intelfb_attach_task); 116 error = i915drmkms_task_schedule(parent, &sc->sc_attach_task); 117 if (error) { 118 aprint_error_dev(self, "failed to schedule mode set: %d\n", 119 error); 120 goto fail1; 121 } 122 config_pending_incr(self); 123 sc->sc_scheduled = true; 124 125 /* Success! */ 126 return; 127 128 fail1: bus_space_unmap(ifa->ifa_fb_bst, sc->sc_fb_bsh, ifa->ifa_fb_size); 129 sc->sc_mapped = false; 130 fail0: return; 131 } 132 133 static int 134 intelfb_detach(device_t self, int flags) 135 { 136 struct intelfb_softc *const sc = device_private(self); 137 int error; 138 139 if (sc->sc_scheduled) 140 return EBUSY; 141 142 if (sc->sc_attached) { 143 pmf_device_deregister(self); 144 error = drmfb_detach(&sc->sc_drmfb, flags); 145 if (error) { 146 /* XXX Ugh. */ 147 (void)pmf_device_register1(self, NULL, NULL, 148 &intelfb_shutdown); 149 return error; 150 } 151 sc->sc_attached = false; 152 } 153 154 if (sc->sc_mapped) { 155 bus_space_unmap(sc->sc_ifa.ifa_fb_bst, sc->sc_fb_bsh, 156 sc->sc_ifa.ifa_fb_size); 157 sc->sc_mapped = false; 158 } 159 160 return 0; 161 } 162 163 static void 164 intelfb_attach_task(struct i915drmkms_task *task) 165 { 166 struct intelfb_softc *const sc = container_of(task, 167 struct intelfb_softc, sc_attach_task); 168 const struct intelfb_attach_args *const ifa = &sc->sc_ifa; 169 const struct drmfb_attach_args da = { 170 .da_dev = sc->sc_dev, 171 .da_fb_helper = ifa->ifa_fb_helper, 172 .da_fb_sizes = &ifa->ifa_fb_sizes, 173 .da_fb_vaddr = bus_space_vaddr(ifa->ifa_fb_bst, sc->sc_fb_bsh), 174 .da_fb_linebytes = ifa->ifa_fb_helper->fb->pitches[0], 175 .da_params = &intelfb_drmfb_params, 176 }; 177 int error; 178 179 error = drmfb_attach(&sc->sc_drmfb, &da); 180 if (error) { 181 aprint_error_dev(sc->sc_dev, "failed to attach drmfb: %d\n", 182 error); 183 goto out; 184 } 185 186 if (!pmf_device_register1(sc->sc_dev, NULL, NULL, &intelfb_shutdown)) 187 aprint_error_dev(sc->sc_dev, 188 "failed to register shutdown handler\n"); 189 190 sc->sc_attached = true; 191 out: 192 config_pending_decr(sc->sc_dev); 193 } 194 195 static bool 196 intelfb_shutdown(device_t self, int flags) 197 { 198 struct intelfb_softc *const sc = device_private(self); 199 200 return drmfb_shutdown(&sc->sc_drmfb, flags); 201 } 202 203 static paddr_t 204 intelfb_drmfb_mmapfb(struct drmfb_softc *drmfb, off_t offset, int prot) 205 { 206 struct intelfb_softc *const sc = container_of(drmfb, 207 struct intelfb_softc, sc_drmfb); 208 struct drm_fb_helper *const helper = sc->sc_ifa.ifa_fb_helper; 209 struct intel_fbdev *const fbdev = container_of(helper, 210 struct intel_fbdev, helper); 211 struct drm_device *const dev = helper->dev; 212 struct drm_i915_private *const dev_priv = dev->dev_private; 213 214 KASSERT(0 <= offset); 215 KASSERT(offset < fbdev->fb->obj->base.size); 216 217 return bus_space_mmap(dev->bst, dev_priv->gtt.mappable_base, 218 i915_gem_obj_ggtt_offset(fbdev->fb->obj) + offset, 219 prot, BUS_SPACE_MAP_PREFETCHABLE); 220 } 221
Indexes created Fri Sep 26 08:10:20 GMT 2025