1 /* $NetBSD: amdgpufb.c,v 1.1 2018/08/27 14:02:32 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2018 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: amdgpufb.c,v 1.1 2018/08/27 14:02:32 riastradh Exp $"); 34 35 #include <sys/types.h> 36 #include <sys/bus.h> 37 #include <sys/device.h> 38 #include <sys/errno.h> 39 40 #include <drm/drmP.h> 41 #include <drm/drmfb.h> 42 #include <drm/drmfb_pci.h> 43 44 #include "amdgpu.h" 45 #include "amdgpu_task.h" 46 #include "amdgpufb.h" 47 48 static int amdgpufb_match(device_t, cfdata_t, void *); 49 static void amdgpufb_attach(device_t, device_t, void *); 50 static int amdgpufb_detach(device_t, int); 51 52 static void amdgpufb_attach_task(struct amdgpu_task *); 53 54 static bool amdgpufb_shutdown(device_t, int); 55 static paddr_t amdgpufb_drmfb_mmapfb(struct drmfb_softc *, off_t, int); 56 57 struct amdgpufb_softc { 58 struct drmfb_softc sc_drmfb; /* XXX Must be first. */ 59 device_t sc_dev; 60 struct amdgpufb_attach_args sc_afa; 61 struct amdgpu_task sc_attach_task; 62 bool sc_scheduled:1; 63 bool sc_attached:1; 64 }; 65 66 static const struct drmfb_params amdgpufb_drmfb_params = { 67 .dp_mmapfb = amdgpufb_drmfb_mmapfb, 68 .dp_mmap = drmfb_pci_mmap, 69 .dp_ioctl = drmfb_pci_ioctl, 70 .dp_is_vga_console = drmfb_pci_is_vga_console, 71 }; 72 73 CFATTACH_DECL_NEW(amdgpufb, sizeof(struct amdgpufb_softc), 74 amdgpufb_match, amdgpufb_attach, amdgpufb_detach, NULL); 75 76 static int 77 amdgpufb_match(device_t parent, cfdata_t match, void *aux) 78 { 79 80 return 1; 81 } 82 83 static void 84 amdgpufb_attach(device_t parent, device_t self, void *aux) 85 { 86 struct amdgpufb_softc *const sc = device_private(self); 87 const struct amdgpufb_attach_args *const afa = aux; 88 int error; 89 90 sc->sc_dev = self; 91 sc->sc_afa = *afa; 92 sc->sc_scheduled = false; 93 sc->sc_attached = false; 94 95 aprint_naive("\n"); 96 aprint_normal("\n"); 97 98 amdgpu_task_init(&sc->sc_attach_task, &amdgpufb_attach_task); 99 error = amdgpu_task_schedule(parent, &sc->sc_attach_task); 100 if (error) { 101 aprint_error_dev(self, "failed to schedule mode set: %d\n", 102 error); 103 goto fail0; 104 } 105 sc->sc_scheduled = true; 106 107 /* Success! */ 108 return; 109 110 fail0: return; 111 } 112 113 static int 114 amdgpufb_detach(device_t self, int flags) 115 { 116 struct amdgpufb_softc *const sc = device_private(self); 117 int error; 118 119 if (sc->sc_scheduled) 120 return EBUSY; 121 122 if (sc->sc_attached) { 123 pmf_device_deregister(self); 124 error = drmfb_detach(&sc->sc_drmfb, flags); 125 if (error) { 126 /* XXX Ugh. */ 127 (void)pmf_device_register1(self, NULL, NULL, 128 &amdgpufb_shutdown); 129 return error; 130 } 131 sc->sc_attached = false; 132 } 133 134 return 0; 135 } 136 137 static void 138 amdgpufb_attach_task(struct amdgpu_task *task) 139 { 140 struct amdgpufb_softc *const sc = container_of(task, 141 struct amdgpufb_softc, sc_attach_task); 142 const struct amdgpufb_attach_args *const afa = &sc->sc_afa; 143 const struct drmfb_attach_args da = { 144 .da_dev = sc->sc_dev, 145 .da_fb_helper = afa->afa_fb_helper, 146 .da_fb_sizes = &afa->afa_fb_sizes, 147 .da_fb_vaddr = __UNVOLATILE(afa->afa_fb_ptr), 148 .da_fb_linebytes = afa->afa_fb_linebytes, 149 .da_params = &amdgpufb_drmfb_params, 150 }; 151 int error; 152 153 error = drmfb_attach(&sc->sc_drmfb, &da); 154 if (error) { 155 aprint_error_dev(sc->sc_dev, "failed to attach drmfb: %d\n", 156 error); 157 return; 158 } 159 160 if (!pmf_device_register1(sc->sc_dev, NULL, NULL, &amdgpufb_shutdown)) 161 aprint_error_dev(sc->sc_dev, 162 "failed to register shutdown handler\n"); 163 164 sc->sc_attached = true; 165 } 166 167 static bool 168 amdgpufb_shutdown(device_t self, int flags) 169 { 170 struct amdgpufb_softc *const sc = device_private(self); 171 172 return drmfb_shutdown(&sc->sc_drmfb, flags); 173 } 174 175 static paddr_t 176 amdgpufb_drmfb_mmapfb(struct drmfb_softc *drmfb, off_t offset, int prot) 177 { 178 struct amdgpufb_softc *const sc = container_of(drmfb, 179 struct amdgpufb_softc, sc_drmfb); 180 struct drm_fb_helper *const helper = sc->sc_afa.afa_fb_helper; 181 struct drm_framebuffer *const fb = helper->fb; 182 struct amdgpu_framebuffer *const rfb = container_of(fb, 183 struct amdgpu_framebuffer, base); 184 struct drm_gem_object *const gobj = rfb->obj; 185 struct amdgpu_bo *const rbo = gem_to_amdgpu_bo(gobj); 186 const unsigned num_pages __diagused = rbo->tbo.num_pages; 187 int flags = 0; 188 189 KASSERT(0 <= offset); 190 KASSERT(offset < ((uintmax_t)num_pages << PAGE_SHIFT)); 191 KASSERT(rbo->tbo.mem.bus.is_iomem); 192 193 if (ISSET(rbo->tbo.mem.placement, TTM_PL_FLAG_WC)) 194 flags |= BUS_SPACE_MAP_PREFETCHABLE; 195 196 return bus_space_mmap(rbo->tbo.bdev->memt, rbo->tbo.mem.bus.base, 197 rbo->tbo.mem.bus.offset + offset, prot, flags); 198 } 199