1 /* $NetBSD: radeon_pci.c,v 1.24 2023/08/07 16:35:06 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 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: radeon_pci.c,v 1.24 2023/08/07 16:35:06 riastradh Exp $"); 34 35 #ifdef _KERNEL_OPT 36 #include "genfb.h" 37 #include "vga.h" 38 #if defined(__arm__) || defined(__aarch64__) 39 #include "opt_fdt.h" 40 #endif 41 #endif 42 43 #include <sys/types.h> 44 #include <sys/atomic.h> 45 #include <sys/queue.h> 46 #include <sys/systm.h> 47 #include <sys/workqueue.h> 48 49 #include <dev/pci/pciio.h> 50 #include <dev/pci/pcireg.h> 51 #include <dev/pci/pcivar.h> 52 53 #include <dev/pci/wsdisplay_pci.h> 54 #include <dev/wsfb/genfbvar.h> 55 56 #if NVGA > 0 57 /* 58 * XXX All we really need is vga_is_console from vgavar.h, but the 59 * header files are missing their own dependencies, so we need to 60 * explicitly drag in the other crap. 61 */ 62 #include <dev/ic/mc6845reg.h> 63 #include <dev/ic/pcdisplayvar.h> 64 #include <dev/ic/vgareg.h> 65 #include <dev/ic/vgavar.h> 66 #endif 67 68 #ifdef FDT 69 #include <dev/fdt/fdtvar.h> 70 #endif 71 72 #include <drm/drm_device.h> 73 #include <drm/drm_drv.h> 74 #include <drm/drm_fb_helper.h> 75 #include <drm/drm_ioctl.h> 76 #include <drm/drm_pci.h> 77 78 #if NGENFB > 0 79 #include <dev/wscons/wsdisplayvar.h> 80 #include <dev/wsfb/genfbvar.h> 81 #endif 82 83 #include <radeon.h> 84 #include "radeon_drv.h" 85 #include "radeon_task.h" 86 87 SIMPLEQ_HEAD(radeon_task_head, radeon_task); 88 89 struct radeon_softc { 90 device_t sc_dev; 91 struct pci_attach_args sc_pa; 92 struct lwp *sc_task_thread; 93 struct radeon_task_head sc_tasks; 94 struct workqueue *sc_task_wq; 95 struct drm_device *sc_drm_dev; 96 struct pci_dev sc_pci_dev; 97 bool sc_pci_attached; 98 bool sc_dev_registered; 99 #if defined(__i386__) 100 #define RADEON_PCI_UGLY_MAP_HACK 101 /* XXX Used to claim the VGA device before attach_real */ 102 bus_space_handle_t sc_temp_memh; 103 bool sc_temp_set; 104 #endif 105 }; 106 107 struct radeon_device * 108 radeon_device_private(device_t self) 109 { 110 struct radeon_softc *const sc = device_private(self); 111 112 return sc->sc_drm_dev->dev_private; 113 } 114 115 static bool radeon_pci_lookup(const struct pci_attach_args *, 116 unsigned long *); 117 118 static int radeon_match(device_t, cfdata_t, void *); 119 static void radeon_attach(device_t, device_t, void *); 120 static void radeon_attach_real(device_t); 121 static int radeon_detach(device_t, int); 122 static bool radeon_do_suspend(device_t, const pmf_qual_t *); 123 static bool radeon_do_resume(device_t, const pmf_qual_t *); 124 125 static void radeon_task_work(struct work *, void *); 126 127 CFATTACH_DECL_NEW(radeon, sizeof(struct radeon_softc), 128 radeon_match, radeon_attach, radeon_detach, NULL); 129 130 /* XXX Kludge to get these from radeon_drv.c. */ 131 extern struct drm_driver *const radeon_drm_driver; 132 extern const struct pci_device_id *const radeon_device_ids; 133 extern const size_t radeon_n_device_ids; 134 135 /* Set this to false if you want to match R100/R200 */ 136 bool radeon_pci_ignore_r100_r200 = true; 137 138 static bool 139 radeon_pci_lookup(const struct pci_attach_args *pa, unsigned long *flags) 140 { 141 size_t i; 142 enum radeon_family fam; 143 144 for (i = 0; i < radeon_n_device_ids; i++) { 145 if ((PCI_VENDOR(pa->pa_id) == radeon_device_ids[i].vendor) && 146 (PCI_PRODUCT(pa->pa_id) == radeon_device_ids[i].device)) 147 break; 148 } 149 150 /* Did we find it? */ 151 if (i == radeon_n_device_ids) 152 return false; 153 154 /* NetBSD drm2 fails on R100 and many R200 chipsets, disable for now */ 155 fam = radeon_device_ids[i].driver_data & RADEON_FAMILY_MASK; 156 if (radeon_pci_ignore_r100_r200 && fam < CHIP_RV280) 157 return false; 158 159 if (flags) 160 *flags = radeon_device_ids[i].driver_data; 161 return true; 162 } 163 164 static int 165 radeon_match(device_t parent, cfdata_t match, void *aux) 166 { 167 extern int radeon_guarantee_initialized(void); 168 const struct pci_attach_args *const pa = aux; 169 int error; 170 171 error = radeon_guarantee_initialized(); 172 if (error) { 173 aprint_error("radeon: failed to initialize: %d\n", error); 174 return 0; 175 } 176 177 if (!radeon_pci_lookup(pa, NULL)) 178 return 0; 179 180 return 6; /* XXX Beat genfb_pci... */ 181 } 182 183 static void 184 radeon_attach(device_t parent, device_t self, void *aux) 185 { 186 struct radeon_softc *const sc = device_private(self); 187 const struct pci_attach_args *const pa = aux; 188 int error; 189 190 pci_aprint_devinfo(pa, NULL); 191 192 /* Initialize the Linux PCI device descriptor. */ 193 linux_pci_dev_init(&sc->sc_pci_dev, self, device_parent(self), pa, 0); 194 195 sc->sc_dev = self; 196 sc->sc_pa = *pa; 197 sc->sc_task_thread = NULL; 198 SIMPLEQ_INIT(&sc->sc_tasks); 199 error = workqueue_create(&sc->sc_task_wq, "radeonfb", 200 &radeon_task_work, NULL, PRI_NONE, IPL_NONE, WQ_MPSAFE); 201 if (error) { 202 aprint_error_dev(self, "unable to create workqueue: %d\n", 203 error); 204 sc->sc_task_wq = NULL; 205 return; 206 } 207 208 #ifdef RADEON_PCI_UGLY_MAP_HACK 209 /* 210 * XXX 211 * We try to map the VGA registers, in case we can prevent vga@isa or 212 * pcdisplay@isa attaching, and stealing wsdisplay0. This only works 213 * with serial console, as actual VGA console has already mapped them. 214 * The only way to handle that is for vga@isa to not attach. 215 */ 216 int rv = bus_space_map(pa->pa_memt, 0xb0000, 0x10000, 0, 217 &sc->sc_temp_memh); 218 sc->sc_temp_set = rv == 0; 219 if (rv != 0) 220 aprint_error_dev(self, "unable to reserve VGA registers for " 221 "i386 radeondrmkms hack\n"); 222 #endif 223 224 #ifdef FDT 225 /* 226 * XXX Remove the simple framebuffer, assuming that this device 227 * will take over. 228 */ 229 const char *fb_compatible[] = { "simple-framebuffer", NULL }; 230 fdt_remove_bycompat(fb_compatible); 231 #endif 232 233 /* 234 * Defer the remainder of initialization until we have mounted 235 * the root file system and can load firmware images. 236 */ 237 config_mountroot(self, &radeon_attach_real); 238 } 239 240 static void 241 radeon_attach_real(device_t self) 242 { 243 struct radeon_softc *const sc = device_private(self); 244 const struct pci_attach_args *const pa = &sc->sc_pa; 245 bool ok __diagused; 246 unsigned long flags; 247 int error; 248 249 ok = radeon_pci_lookup(pa, &flags); 250 KASSERT(ok); 251 252 #ifdef RADEON_PCI_UGLY_MAP_HACK 253 /* 254 * XXX 255 * Unmap the VGA registers. 256 */ 257 if (sc->sc_temp_set) 258 bus_space_unmap(pa->pa_memt, sc->sc_temp_memh, 0x10000); 259 #endif 260 261 /* 262 * Cause any tasks issued synchronously during attach to be 263 * processed at the end of this function. 264 */ 265 sc->sc_task_thread = curlwp; 266 267 sc->sc_drm_dev = drm_dev_alloc(radeon_drm_driver, self); 268 if (IS_ERR(sc->sc_drm_dev)) { 269 aprint_error_dev(self, "unable to create drm device: %ld\n", 270 PTR_ERR(sc->sc_drm_dev)); 271 sc->sc_drm_dev = NULL; 272 goto out; 273 } 274 275 /* XXX errno Linux->NetBSD */ 276 error = -drm_pci_attach(sc->sc_drm_dev, &sc->sc_pci_dev); 277 if (error) { 278 aprint_error_dev(self, "unable to attach drm: %d\n", error); 279 goto out; 280 } 281 sc->sc_pci_attached = true; 282 283 #if NGENFB > 0 284 /* 285 * If MD initialization has selected this as the console device 286 * with a firmware-provided framebuffer address, we may have to 287 * turn it off early, before we are ready to switch the console 288 * over -- something goes wrong if we're still writing to the 289 * firmware-provided framebuffer during initialization. 290 */ 291 { 292 bool is_console; 293 if (prop_dictionary_get_bool(device_properties(self), "is_console", 294 &is_console) && 295 is_console && 296 genfb_is_console()) 297 wsdisplay_predetach(); 298 } 299 #endif 300 301 /* XXX errno Linux->NetBSD */ 302 error = -drm_dev_register(sc->sc_drm_dev, flags); 303 if (error) { 304 aprint_error_dev(self, "unable to register drm: %d\n", error); 305 goto out; 306 } 307 sc->sc_dev_registered = true; 308 309 if (!pmf_device_register(self, &radeon_do_suspend, &radeon_do_resume)) 310 aprint_error_dev(self, "unable to establish power handler\n"); 311 312 /* 313 * Process asynchronous tasks queued synchronously during 314 * attach. This will be for display detection to attach a 315 * framebuffer, so we have the opportunity for a console device 316 * to attach before autoconf has completed, in time for init(8) 317 * to find that console without panicking. 318 */ 319 while (!SIMPLEQ_EMPTY(&sc->sc_tasks)) { 320 struct radeon_task *const task = SIMPLEQ_FIRST(&sc->sc_tasks); 321 322 SIMPLEQ_REMOVE_HEAD(&sc->sc_tasks, rt_u.queue); 323 (*task->rt_fn)(task); 324 } 325 326 out: /* Cause any subesquent tasks to be processed by the workqueue. */ 327 atomic_store_relaxed(&sc->sc_task_thread, NULL); 328 } 329 330 static int 331 radeon_detach(device_t self, int flags) 332 { 333 struct radeon_softc *const sc = device_private(self); 334 int error; 335 336 /* XXX Check for in-use before tearing it all down... */ 337 error = config_detach_children(self, flags); 338 if (error) 339 return error; 340 341 KASSERT(sc->sc_task_thread == NULL); 342 KASSERT(SIMPLEQ_EMPTY(&sc->sc_tasks)); 343 344 pmf_device_deregister(self); 345 if (sc->sc_dev_registered) 346 drm_dev_unregister(sc->sc_drm_dev); 347 if (sc->sc_pci_attached) 348 drm_pci_detach(sc->sc_drm_dev); 349 if (sc->sc_drm_dev) { 350 drm_dev_put(sc->sc_drm_dev); 351 sc->sc_drm_dev = NULL; 352 } 353 if (sc->sc_task_wq) { 354 workqueue_destroy(sc->sc_task_wq); 355 sc->sc_task_wq = NULL; 356 } 357 linux_pci_dev_destroy(&sc->sc_pci_dev); 358 359 return 0; 360 } 361 362 static bool 363 radeon_do_suspend(device_t self, const pmf_qual_t *qual) 364 { 365 struct radeon_softc *const sc = device_private(self); 366 struct drm_device *const dev = sc->sc_drm_dev; 367 int ret; 368 bool is_console = true; /* XXX */ 369 370 drm_suspend_ioctl(dev); 371 372 ret = radeon_suspend_kms(dev, true, is_console, false); 373 if (ret) 374 return false; 375 376 return true; 377 } 378 379 static bool 380 radeon_do_resume(device_t self, const pmf_qual_t *qual) 381 { 382 struct radeon_softc *const sc = device_private(self); 383 struct drm_device *const dev = sc->sc_drm_dev; 384 int ret; 385 bool is_console = true; /* XXX */ 386 387 ret = radeon_resume_kms(dev, true, is_console); 388 if (ret) 389 goto out; 390 391 out: drm_resume_ioctl(dev); 392 return ret == 0; 393 } 394 395 static void 396 radeon_task_work(struct work *work, void *cookie __unused) 397 { 398 struct radeon_task *const task = container_of(work, struct radeon_task, 399 rt_u.work); 400 401 (*task->rt_fn)(task); 402 } 403 404 void 405 radeon_task_schedule(device_t self, struct radeon_task *task) 406 { 407 struct radeon_softc *const sc = device_private(self); 408 409 if (atomic_load_relaxed(&sc->sc_task_thread) == curlwp) 410 SIMPLEQ_INSERT_TAIL(&sc->sc_tasks, task, rt_u.queue); 411 else 412 workqueue_enqueue(sc->sc_task_wq, &task->rt_u.work, NULL); 413 } 414
Indexes created Sat Sep 20 22:09:52 GMT 2025