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 *
radeon_device_private(device_t self)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
radeon_pci_lookup(const struct pci_attach_args * pa,unsigned long * flags)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
radeon_match(device_t parent,cfdata_t match,void * aux)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
radeon_attach(device_t parent,device_t self,void * aux)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
radeon_attach_real(device_t self)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
radeon_detach(device_t self,int flags)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
radeon_do_suspend(device_t self,const pmf_qual_t * qual)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
radeon_do_resume(device_t self,const pmf_qual_t * qual)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
radeon_task_work(struct work * work,void * cookie __unused)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
radeon_task_schedule(device_t self,struct radeon_task * task)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