intelfb.c revision 1.13
1 /* $NetBSD: intelfb.c,v 1.13 2015/04/04 15:12:39 jmcneill 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 1.13 2015/04/04 15:12:39 jmcneill Exp $"); 34 35 #include <sys/types.h> 36 #include <sys/bus.h> 37 #include <sys/device.h> 38 39 #include <drm/drmP.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 "intelfb.h" 46 47 static int intelfb_match(device_t, cfdata_t, void *); 48 static void intelfb_attach(device_t, device_t, void *); 49 static int intelfb_detach(device_t, int); 50 51 static void intelfb_attach_task(struct i915drmkms_task *); 52 53 static bool intelfb_shutdown(device_t, int); 54 55 static paddr_t intelfb_drmfb_mmapfb(struct drmfb_softc *, off_t, int); 56 57 struct intelfb_softc { 58 struct drmfb_softc sc_drmfb; /* XXX Must be first. */ 59 device_t sc_dev; 60 struct intelfb_attach_args sc_ifa; 61 bus_space_handle_t sc_fb_bsh; 62 struct i915drmkms_task sc_attach_task; 63 bool sc_mapped:1; 64 bool sc_scheduled:1; 65 bool sc_attached:1; 66 }; 67 68 static const struct drmfb_params intelfb_drmfb_params = { 69 .dp_mmapfb = intelfb_drmfb_mmapfb, 70 .dp_mmap = drmfb_pci_mmap, 71 .dp_ioctl = drmfb_pci_ioctl, 72 .dp_is_vga_console = drmfb_pci_is_vga_console, 73 .dp_disable_vga = i915_disable_vga, 74 }; 75 76 CFATTACH_DECL_NEW(intelfb, sizeof(struct intelfb_softc), 77 intelfb_match, intelfb_attach, intelfb_detach, NULL); 78 79 static int 80 intelfb_match(device_t parent, cfdata_t match, void *aux) 81 { 82 83 return 1; 84 } 85 86 static void 87 intelfb_attach(device_t parent, device_t self, void *aux) 88 { 89 struct intelfb_softc *const sc = device_private(self); 90 const struct intelfb_attach_args *const ifa = aux; 91 int error; 92 93 sc->sc_dev = self; 94 sc->sc_ifa = *ifa; 95 sc->sc_mapped = false; 96 sc->sc_scheduled = false; 97 sc->sc_attached = false; 98 99 aprint_naive("\n"); 100 aprint_normal("\n"); 101 102 /* XXX Defer this too? */ 103 error = bus_space_map(ifa->ifa_fb_bst, ifa->ifa_fb_addr, 104 ifa->ifa_fb_size, 105 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_PREFETCHABLE, 106 &sc->sc_fb_bsh); 107 if (error) { 108 aprint_error_dev(self, "unable to map framebuffer: %d\n", 109 error); 110 goto fail0; 111 } 112 sc->sc_mapped = true; 113 114 i915drmkms_task_init(&sc->sc_attach_task, &intelfb_attach_task); 115 error = i915drmkms_task_schedule(parent, &sc->sc_attach_task); 116 if (error) { 117 aprint_error_dev(self, "failed to schedule mode set: %d\n", 118 error); 119 goto fail1; 120 } 121 sc->sc_scheduled = true; 122 123 /* Success! */ 124 return; 125 126 fail1: bus_space_unmap(ifa->ifa_fb_bst, sc->sc_fb_bsh, ifa->ifa_fb_size); 127 sc->sc_mapped = false; 128 fail0: return; 129 } 130 131 static int 132 intelfb_detach(device_t self, int flags) 133 { 134 struct intelfb_softc *const sc = device_private(self); 135 int error; 136 137 if (sc->sc_scheduled) 138 return EBUSY; 139 140 if (sc->sc_attached) { 141 pmf_device_deregister(self); 142 error = drmfb_detach(&sc->sc_drmfb, flags); 143 if (error) { 144 /* XXX Ugh. */ 145 (void)pmf_device_register1(self, NULL, NULL, 146 &intelfb_shutdown); 147 return error; 148 } 149 sc->sc_attached = false; 150 } 151 152 if (sc->sc_mapped) { 153 bus_space_unmap(sc->sc_ifa.ifa_fb_bst, sc->sc_fb_bsh, 154 sc->sc_ifa.ifa_fb_size); 155 sc->sc_mapped = false; 156 } 157 158 return 0; 159 } 160 161 static void 162 intelfb_attach_task(struct i915drmkms_task *task) 163 { 164 struct intelfb_softc *const sc = container_of(task, 165 struct intelfb_softc, sc_attach_task); 166 const struct intelfb_attach_args *const ifa = &sc->sc_ifa; 167 const struct drmfb_attach_args da = { 168 .da_dev = sc->sc_dev, 169 .da_fb_helper = ifa->ifa_fb_helper, 170 .da_fb_sizes = &ifa->ifa_fb_sizes, 171 .da_fb_vaddr = bus_space_vaddr(ifa->ifa_fb_bst, sc->sc_fb_bsh), 172 .da_params = &intelfb_drmfb_params, 173 }; 174 int error; 175 176 error = drmfb_attach(&sc->sc_drmfb, &da); 177 if (error) { 178 aprint_error_dev(sc->sc_dev, "failed to attach drmfb: %d\n", 179 error); 180 return; 181 } 182 183 if (!pmf_device_register1(sc->sc_dev, NULL, NULL, &intelfb_shutdown)) 184 aprint_error_dev(sc->sc_dev, 185 "failed to register shutdown handler\n"); 186 187 sc->sc_attached = true; 188 } 189 190 static bool 191 intelfb_shutdown(device_t self, int flags) 192 { 193 struct intelfb_softc *const sc = device_private(self); 194 195 return drmfb_shutdown(&sc->sc_drmfb, flags); 196 } 197 198 static paddr_t 199 intelfb_drmfb_mmapfb(struct drmfb_softc *drmfb, off_t offset, int prot) 200 { 201 struct intelfb_softc *const sc = container_of(drmfb, 202 struct intelfb_softc, sc_drmfb); 203 struct drm_fb_helper *const helper = sc->sc_ifa.ifa_fb_helper; 204 struct intel_fbdev *const fbdev = container_of(helper, 205 struct intel_fbdev, helper); 206 struct drm_device *const dev = helper->dev; 207 struct drm_i915_private *const dev_priv = dev->dev_private; 208 209 KASSERT(0 <= offset); 210 KASSERT(offset < fbdev->fb->obj->base.size); 211 212 return bus_space_mmap(dev->bst, dev_priv->gtt.mappable_base, 213 i915_gem_obj_ggtt_offset(fbdev->fb->obj) + offset, 214 prot, BUS_SPACE_MAP_PREFETCHABLE); 215 } 216
Indexes created Thu Sep 25 08:09:54 GMT 2025