| 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 | |