xref: /netbsd-src/sys/external/bsd/drm2/radeon/radeon_pci.c (revision 58192d983216ae0d29c7f8a6d46e463f438867e7)
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