1 /* $NetBSD: nouveaufb.c,v 1.9 2022/07/18 23:34:02 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2015 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: nouveaufb.c,v 1.9 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/drm_drv.h> 41 #include <drm/drmfb.h> 42 #include <drm/drmfb_pci.h> 43 44 #include <ttm/ttm_placement.h> 45 46 #include "nouveau_bo.h" 47 #include "nouveau_drv.h" 48 #include "nouveau_fbcon.h" 49 #include "nouveau_pci.h" 50 #include "nouveaufb.h" 51 52 static int nouveaufb_match(device_t, cfdata_t, void *); 53 static void nouveaufb_attach(device_t, device_t, void *); 54 static int nouveaufb_detach(device_t, int); 55 56 static void nouveaufb_attach_task(struct nouveau_pci_task *); 57 58 static bool nouveaufb_shutdown(device_t, int); 59 static paddr_t nouveaufb_drmfb_mmapfb(struct drmfb_softc *, off_t, int); 60 61 struct nouveaufb_softc { 62 struct drmfb_softc sc_drmfb; /* XXX Must be first. */ 63 device_t sc_dev; 64 struct nouveaufb_attach_args sc_nfa; 65 struct nouveau_pci_task sc_attach_task; 66 bool sc_attached:1; 67 }; 68 69 static const struct drmfb_params nouveaufb_drmfb_params = { 70 .dp_mmapfb = nouveaufb_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 }; 75 76 CFATTACH_DECL_NEW(nouveaufb, sizeof(struct nouveaufb_softc), 77 nouveaufb_match, nouveaufb_attach, nouveaufb_detach, NULL); 78 79 static int 80 nouveaufb_match(device_t parent, cfdata_t match, void *aux) 81 { 82 83 return 1; 84 } 85 86 static void 87 nouveaufb_attach(device_t parent, device_t self, void *aux) 88 { 89 struct nouveaufb_softc *const sc = device_private(self); 90 const struct nouveaufb_attach_args *const nfa = aux; 91 92 sc->sc_dev = self; 93 sc->sc_nfa = *nfa; 94 sc->sc_attached = false; 95 96 aprint_naive("\n"); 97 aprint_normal("\n"); 98 99 nouveau_pci_task_init(&sc->sc_attach_task, &nouveaufb_attach_task); 100 nouveau_pci_task_schedule(parent, &sc->sc_attach_task); 101 config_pending_incr(self); 102 } 103 104 static int 105 nouveaufb_detach(device_t self, int flags) 106 { 107 struct nouveaufb_softc *const sc = device_private(self); 108 int error; 109 110 if (sc->sc_attached) { 111 pmf_device_deregister(self); 112 error = drmfb_detach(&sc->sc_drmfb, flags); 113 if (error) { 114 /* XXX Ugh. */ 115 (void)pmf_device_register1(self, NULL, NULL, 116 &nouveaufb_shutdown); 117 return error; 118 } 119 sc->sc_attached = false; 120 } 121 122 return 0; 123 } 124 125 static void 126 nouveaufb_attach_task(struct nouveau_pci_task *task) 127 { 128 struct nouveaufb_softc *const sc = container_of(task, 129 struct nouveaufb_softc, sc_attach_task); 130 const struct nouveaufb_attach_args *const nfa = &sc->sc_nfa; 131 const struct drmfb_attach_args da = { 132 .da_dev = sc->sc_dev, 133 .da_fb_helper = nfa->nfa_fb_helper, 134 .da_fb_sizes = &nfa->nfa_fb_sizes, 135 .da_fb_vaddr = __UNVOLATILE(nfa->nfa_fb_ptr), 136 .da_fb_linebytes = nfa->nfa_fb_linebytes, 137 .da_params = &nouveaufb_drmfb_params, 138 }; 139 int error; 140 141 error = drmfb_attach(&sc->sc_drmfb, &da); 142 if (error) { 143 aprint_error_dev(sc->sc_dev, "failed to attach drmfb: %d\n", 144 error); 145 goto out; 146 } 147 148 if (!pmf_device_register1(sc->sc_dev, NULL, NULL, &nouveaufb_shutdown)) 149 aprint_error_dev(sc->sc_dev, 150 "failed to register shutdown handler\n"); 151 152 sc->sc_attached = true; 153 out: 154 config_pending_decr(sc->sc_dev); 155 } 156 157 static bool 158 nouveaufb_shutdown(device_t self, int flags) 159 { 160 struct nouveaufb_softc *const sc = device_private(self); 161 162 return drmfb_shutdown(&sc->sc_drmfb, flags); 163 } 164 165 static paddr_t 166 nouveaufb_drmfb_mmapfb(struct drmfb_softc *drmfb, off_t offset, int prot) 167 { 168 struct nouveaufb_softc *const sc = container_of(drmfb, 169 struct nouveaufb_softc, sc_drmfb); 170 struct drm_fb_helper *const helper = sc->sc_nfa.nfa_fb_helper; 171 struct drm_framebuffer *const fb = helper->fb; 172 struct nouveau_framebuffer *const nvfb = container_of(fb, 173 struct nouveau_framebuffer, base); 174 struct nouveau_bo *const nvbo = nvfb->nvbo; 175 const unsigned num_pages __diagused = nvbo->bo.num_pages; 176 int flags = 0; 177 178 KASSERT(0 <= offset); 179 KASSERT(offset < (num_pages << PAGE_SHIFT)); 180 181 if (ISSET(nvbo->bo.mem.placement, TTM_PL_FLAG_WC)) 182 flags |= BUS_SPACE_MAP_PREFETCHABLE; 183 184 return bus_space_mmap(nvbo->bo.bdev->memt, nvbo->bo.mem.bus.base, 185 nvbo->bo.mem.bus.offset + offset, prot, flags); 186 } 187
Indexes created Sun Sep 28 16:09:52 GMT 2025