1 /* $NetBSD: radeondrmkmsfb.c,v 1.17 2022/07/18 23:34:03 riastradh 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 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: radeondrmkmsfb.c,v 1.17 2022/07/18 23:34:03 riastradh Exp $"); 35 36 #include <sys/types.h> 37 #include <sys/device.h> 38 39 #include <drm/drm_fb_helper.h> 40 #include <drm/drmfb.h> 41 #include <drm/drmfb_pci.h> 42 43 #include <radeon.h> 44 #include "radeon_drv.h" 45 #include "radeon_task.h" 46 #include "radeondrmkmsfb.h" 47 48 struct radeonfb_softc { 49 struct drmfb_softc sc_drmfb; /* XXX Must be first. */ 50 device_t sc_dev; 51 struct radeonfb_attach_args sc_rfa; 52 struct radeon_task sc_attach_task; 53 bool sc_attached:1; 54 }; 55 56 static int radeonfb_match(device_t, cfdata_t, void *); 57 static void radeonfb_attach(device_t, device_t, void *); 58 static int radeonfb_detach(device_t, int); 59 60 static void radeonfb_attach_task(struct radeon_task *); 61 62 static paddr_t radeonfb_drmfb_mmapfb(struct drmfb_softc *, off_t, int); 63 static bool radeonfb_shutdown(device_t, int); 64 65 CFATTACH_DECL_NEW(radeondrmkmsfb, sizeof(struct radeonfb_softc), 66 radeonfb_match, radeonfb_attach, radeonfb_detach, NULL); 67 68 static const struct drmfb_params radeonfb_drmfb_params = { 69 .dp_mmapfb = radeonfb_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 }; 74 75 static int 76 radeonfb_match(device_t parent, cfdata_t match, void *aux) 77 { 78 79 return 1; 80 } 81 82 static void 83 radeonfb_attach(device_t parent, device_t self, void *aux) 84 { 85 struct radeonfb_softc *const sc = device_private(self); 86 const struct radeonfb_attach_args *const rfa = aux; 87 88 sc->sc_dev = self; 89 sc->sc_rfa = *rfa; 90 sc->sc_attached = false; 91 92 aprint_naive("\n"); 93 aprint_normal("\n"); 94 95 radeon_task_init(&sc->sc_attach_task, &radeonfb_attach_task); 96 radeon_task_schedule(parent, &sc->sc_attach_task); 97 config_pending_incr(self); 98 } 99 100 static int 101 radeonfb_detach(device_t self, int flags) 102 { 103 struct radeonfb_softc *const sc = device_private(self); 104 int error; 105 106 if (sc->sc_attached) { 107 pmf_device_deregister(self); 108 error = drmfb_detach(&sc->sc_drmfb, flags); 109 if (error) { 110 /* XXX Ugh. */ 111 (void)pmf_device_register1(self, NULL, NULL, 112 &radeonfb_shutdown); 113 return error; 114 } 115 sc->sc_attached = false; 116 } 117 118 return 0; 119 } 120 121 static void 122 radeonfb_attach_task(struct radeon_task *task) 123 { 124 struct radeonfb_softc *const sc = container_of(task, 125 struct radeonfb_softc, sc_attach_task); 126 const struct radeonfb_attach_args *const rfa = &sc->sc_rfa; 127 const struct drmfb_attach_args da = { 128 .da_dev = sc->sc_dev, 129 .da_fb_helper = rfa->rfa_fb_helper, 130 .da_fb_sizes = &rfa->rfa_fb_sizes, 131 .da_fb_vaddr = __UNVOLATILE(rfa->rfa_fb_ptr), 132 .da_fb_linebytes = rfa->rfa_fb_linebytes, 133 .da_params = &radeonfb_drmfb_params, 134 }; 135 int error; 136 137 error = drmfb_attach(&sc->sc_drmfb, &da); 138 if (error) { 139 aprint_error_dev(sc->sc_dev, "failed to attach drmfb: %d\n", 140 error); 141 goto out; 142 } 143 if (!pmf_device_register1(sc->sc_dev, NULL, NULL, &radeonfb_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 radeonfb_shutdown(device_t self, int flags) 154 { 155 struct radeonfb_softc *const sc = device_private(self); 156 157 return drmfb_shutdown(&sc->sc_drmfb, flags); 158 } 159 160 static paddr_t 161 radeonfb_drmfb_mmapfb(struct drmfb_softc *drmfb, off_t offset, int prot) 162 { 163 struct radeonfb_softc *const sc = container_of(drmfb, 164 struct radeonfb_softc, sc_drmfb); 165 struct drm_fb_helper *const helper = sc->sc_rfa.rfa_fb_helper; 166 struct drm_framebuffer *const fb = helper->fb; 167 struct drm_gem_object *const gobj = fb->obj[0]; 168 struct radeon_bo *const rbo = gem_to_radeon_bo(gobj); 169 int flags = 0; 170 171 if (offset < 0) 172 return -1; 173 174 const unsigned num_pages __diagused = rbo->tbo.num_pages; 175 176 KASSERT(offset < (num_pages << PAGE_SHIFT)); 177 KASSERT(rbo->tbo.mem.bus.is_iomem); 178 179 if (ISSET(rbo->tbo.mem.placement, TTM_PL_FLAG_WC)) 180 flags |= BUS_SPACE_MAP_PREFETCHABLE; 181 182 return bus_space_mmap(rbo->tbo.bdev->memt, 183 rbo->tbo.mem.bus.base, rbo->tbo.mem.bus.offset + offset, 184 prot, flags); 185 } 186
Indexes created Sat Sep 27 22:09:54 GMT 2025