1 /* $NetBSD: amdgpufb.c,v 1.5 2022/07/18 23:34:02 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 1.5 2022/07/18 23:34:02 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/drmfb.h> 41 #include <drm/drmfb_pci.h> 42 43 #include "amdgpu.h" 44 #include "amdgpu_task.h" 45 #include "amdgpufb.h" 46 47 static int amdgpufb_match(device_t, cfdata_t, void *); 48 static void amdgpufb_attach(device_t, device_t, void *); 49 static int amdgpufb_detach(device_t, int); 50 51 static void amdgpufb_attach_task(struct amdgpu_task *); 52 53 static bool amdgpufb_shutdown(device_t, int); 54 static paddr_t amdgpufb_drmfb_mmapfb(struct drmfb_softc *, off_t, int); 55 56 struct amdgpufb_softc { 57 struct drmfb_softc sc_drmfb; /* XXX Must be first. */ 58 device_t sc_dev; 59 struct amdgpufb_attach_args sc_afa; 60 struct amdgpu_task sc_attach_task; 61 bool sc_attached:1; 62 }; 63 64 static const struct drmfb_params amdgpufb_drmfb_params = { 65 .dp_mmapfb = amdgpufb_drmfb_mmapfb, 66 .dp_mmap = drmfb_pci_mmap, 67 .dp_ioctl = drmfb_pci_ioctl, 68 .dp_is_vga_console = drmfb_pci_is_vga_console, 69 }; 70 71 CFATTACH_DECL_NEW(amdgpufb, sizeof(struct amdgpufb_softc), 72 amdgpufb_match, amdgpufb_attach, amdgpufb_detach, NULL); 73 74 static int 75 amdgpufb_match(device_t parent, cfdata_t match, void *aux) 76 { 77 78 return 1; 79 } 80 81 static void 82 amdgpufb_attach(device_t parent, device_t self, void *aux) 83 { 84 struct amdgpufb_softc *const sc = device_private(self); 85 const struct amdgpufb_attach_args *const afa = aux; 86 87 sc->sc_dev = self; 88 sc->sc_afa = *afa; 89 sc->sc_attached = false; 90 91 aprint_naive("\n"); 92 aprint_normal("\n"); 93 94 amdgpu_task_init(&sc->sc_attach_task, &amdgpufb_attach_task); 95 amdgpu_task_schedule(parent, &sc->sc_attach_task); 96 config_pending_incr(self); 97 } 98 99 static int 100 amdgpufb_detach(device_t self, int flags) 101 { 102 struct amdgpufb_softc *const sc = device_private(self); 103 int error; 104 105 if (sc->sc_attached) { 106 pmf_device_deregister(self); 107 error = drmfb_detach(&sc->sc_drmfb, flags); 108 if (error) { 109 /* XXX Ugh. */ 110 (void)pmf_device_register1(self, NULL, NULL, 111 &amdgpufb_shutdown); 112 return error; 113 } 114 sc->sc_attached = false; 115 } 116 117 return 0; 118 } 119 120 static void 121 amdgpufb_attach_task(struct amdgpu_task *task) 122 { 123 struct amdgpufb_softc *const sc = container_of(task, 124 struct amdgpufb_softc, sc_attach_task); 125 const struct amdgpufb_attach_args *const afa = &sc->sc_afa; 126 const struct drmfb_attach_args da = { 127 .da_dev = sc->sc_dev, 128 .da_fb_helper = afa->afa_fb_helper, 129 .da_fb_sizes = &afa->afa_fb_sizes, 130 .da_fb_vaddr = __UNVOLATILE(afa->afa_fb_ptr), 131 .da_fb_linebytes = afa->afa_fb_linebytes, 132 .da_params = &amdgpufb_drmfb_params, 133 }; 134 int error; 135 136 error = drmfb_attach(&sc->sc_drmfb, &da); 137 if (error) { 138 aprint_error_dev(sc->sc_dev, "failed to attach drmfb: %d\n", 139 error); 140 goto out; 141 } 142 143 if (!pmf_device_register1(sc->sc_dev, NULL, NULL, &amdgpufb_shutdown)) 144 aprint_error_dev(sc->sc_dev, 145 "failed to register shutdown handler\n"); 146 147 sc->sc_attached = true; 148 out: 149 config_pending_decr(sc->sc_dev); 150 } 151 152 static bool 153 amdgpufb_shutdown(device_t self, int flags) 154 { 155 struct amdgpufb_softc *const sc = device_private(self); 156 157 return drmfb_shutdown(&sc->sc_drmfb, flags); 158 } 159 160 static paddr_t 161 amdgpufb_drmfb_mmapfb(struct drmfb_softc *drmfb, off_t offset, int prot) 162 { 163 struct amdgpufb_softc *const sc = container_of(drmfb, 164 struct amdgpufb_softc, sc_drmfb); 165 struct drm_fb_helper *const helper = sc->sc_afa.afa_fb_helper; 166 struct drm_framebuffer *const fb = helper->fb; 167 struct drm_gem_object *const gobj = fb->obj[0]; 168 struct amdgpu_bo *const rbo = gem_to_amdgpu_bo(gobj); 169 const unsigned num_pages __diagused = rbo->tbo.num_pages; 170 int flags = 0; 171 172 KASSERT(0 <= offset); 173 KASSERT(offset < ((uintmax_t)num_pages << PAGE_SHIFT)); 174 KASSERT(rbo->tbo.mem.bus.is_iomem); 175 176 if (ISSET(rbo->tbo.mem.placement, TTM_PL_FLAG_WC)) 177 flags |= BUS_SPACE_MAP_PREFETCHABLE; 178 179 return bus_space_mmap(rbo->tbo.bdev->memt, rbo->tbo.mem.bus.base, 180 rbo->tbo.mem.bus.offset + offset, prot, flags); 181 } 182
Indexes created Sun Sep 21 18:09:52 GMT 2025