nouveau_pci.c revision 1.32 
1/*	$NetBSD: nouveau_pci.c,v 1.32 2021/12/19 11:09:48 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: nouveau_pci.c,v 1.32 2021/12/19 11:09:48 riastradh Exp $");
34
35#ifdef _KERNEL_OPT
36#if defined(__arm__) || defined(__aarch64__)
37#include "opt_fdt.h"
38#endif
39#endif
40
41#include <sys/types.h>
42#include <sys/device.h>
43#include <sys/queue.h>
44#include <sys/workqueue.h>
45#include <sys/module.h>
46
47#ifdef FDT
48#include <dev/fdt/fdtvar.h>
49#endif
50
51#include <drm/drm_pci.h>
52
53#include <core/device.h>
54#include <core/pci.h>
55
56#include "nouveau_drv.h"
57#include "nouveau_pci.h"
58
59struct drm_device;
60
61MODULE(MODULE_CLASS_DRIVER, nouveau_pci, "nouveau,drmkms_pci");
62
63SIMPLEQ_HEAD(nouveau_pci_task_head, nouveau_pci_task);
64
65struct nouveau_pci_softc {
66	device_t		sc_dev;
67	struct pci_attach_args	sc_pa;
68	enum {
69		NOUVEAU_TASK_ATTACH,
70		NOUVEAU_TASK_WORKQUEUE,
71	}			sc_task_state;
72	union {
73		struct workqueue		*workqueue;
74		struct nouveau_pci_task_head	attach;
75	}			sc_task_u;
76	struct drm_device	*sc_drm_dev;
77	struct pci_dev		sc_pci_dev;
78	struct nvkm_device	*sc_nv_dev;
79	bool			sc_pci_attached;
80	bool			sc_dev_registered;
81};
82
83static int	nouveau_pci_match(device_t, cfdata_t, void *);
84static void	nouveau_pci_attach(device_t, device_t, void *);
85static void	nouveau_pci_attach_real(device_t);
86static int	nouveau_pci_detach(device_t, int);
87
88static bool	nouveau_pci_suspend(device_t, const pmf_qual_t *);
89static bool	nouveau_pci_resume(device_t, const pmf_qual_t *);
90
91static void	nouveau_pci_task_work(struct work *, void *);
92
93CFATTACH_DECL_NEW(nouveau_pci, sizeof(struct nouveau_pci_softc),
94    nouveau_pci_match, nouveau_pci_attach, nouveau_pci_detach, NULL);
95
96/* Kludge to get this from nouveau_drm.c.  */
97extern struct drm_driver *const nouveau_drm_driver_pci;
98
99static int
100nouveau_pci_match(device_t parent, cfdata_t match, void *aux)
101{
102	const struct pci_attach_args *const pa = aux;
103	struct pci_dev pdev;
104	struct nvkm_device *device;
105	int ret;
106
107	if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_NVIDIA &&
108	    PCI_VENDOR(pa->pa_id) != PCI_VENDOR_NVIDIA_SGS)
109		return 0;
110
111	if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY)
112		return 0;
113
114	/*
115	 * NetBSD drm2 doesn't support Pascal, Volta or Turing based cards:
116	 *   0x1580-0x15ff 	GP100
117	 *   0x1b00-0x1b7f 	GP102
118	 *   0x1b80-0x1bff 	GP104
119	 *   0x1c00-0x1c7f 	GP106
120	 *   0x1c80-0x1cff 	GP107
121	 *   0x1d00-0x1d7f 	GP108
122	 *   0x1d80-0x1dff 	GV100
123	 *   0x1e00-0x1e7f 	TU102
124	 *   0x1e80-0x1eff 	TU104
125	 *   0x1f00-0x1f7f 	TU106
126	 *   0x1f80-0x1fff 	TU117
127	 *   0x2180-0x21ff 	TU116
128	 *
129	 * reduce this to >= 1580, so that new chipsets not explictly
130	 * listed above will be picked up.
131	 *
132	 * XXX perhaps switch this to explicitly match known list.
133	 */
134	if (PCI_PRODUCT(pa->pa_id) >= 0x1580)
135		return 0;
136
137	linux_pci_dev_init(&pdev, parent /* XXX bogus */, parent, pa, 0);
138	ret = nvkm_device_pci_new(&pdev, NULL, "error",
139	    /* detect */ true, /* mmio */ false, /* subdev_mask */ 0, &device);
140	if (ret == 0)		/* don't want to hang onto it */
141		nvkm_device_del(&device);
142	linux_pci_dev_destroy(&pdev);
143	if (ret)		/* failure */
144		return 0;
145
146	return 6;		/* XXX Beat genfb_pci...  */
147}
148
149extern char *nouveau_config;
150extern char *nouveau_debug;
151
152static void
153nouveau_pci_attach(device_t parent, device_t self, void *aux)
154{
155	struct nouveau_pci_softc *const sc = device_private(self);
156	const struct pci_attach_args *const pa = aux;
157
158	pci_aprint_devinfo(pa, NULL);
159
160	if (!pmf_device_register(self, &nouveau_pci_suspend, &nouveau_pci_resume))
161		aprint_error_dev(self, "unable to establish power handler\n");
162
163	/*
164	 * Trivial initialization first; the rest will come after we
165	 * have mounted the root file system and can load firmware
166	 * images.
167	 */
168	sc->sc_dev = NULL;
169	sc->sc_pa = *pa;
170
171#ifdef FDT
172	/*
173	 * XXX Remove the simple framebuffer, assuming that this device
174	 * will take over.
175	 */
176	const char *fb_compatible[] = { "simple-framebuffer", NULL };
177	fdt_remove_bycompat(fb_compatible);
178#endif
179
180	config_mountroot(self, &nouveau_pci_attach_real);
181}
182
183static void
184nouveau_pci_attach_real(device_t self)
185{
186	struct nouveau_pci_softc *const sc = device_private(self);
187	const struct pci_attach_args *const pa = &sc->sc_pa;
188	int error;
189
190	sc->sc_dev = self;
191	sc->sc_task_state = NOUVEAU_TASK_ATTACH;
192	SIMPLEQ_INIT(&sc->sc_task_u.attach);
193
194	/* Initialize the Linux PCI device descriptor.  */
195	linux_pci_dev_init(&sc->sc_pci_dev, self, device_parent(self), pa, 0);
196
197	/* XXX errno Linux->NetBSD */
198	error = -nvkm_device_pci_new(&sc->sc_pci_dev,
199	    nouveau_config, nouveau_debug,
200	    /* detect */ true, /* mmio */ true, /* subdev_mask */ ~0ULL,
201	    &sc->sc_nv_dev);
202	if (error) {
203		aprint_error_dev(self, "unable to create nouveau device: %d\n",
204		    error);
205		sc->sc_nv_dev = NULL;
206		return;
207	}
208
209	sc->sc_drm_dev = drm_dev_alloc(nouveau_drm_driver_pci, self);
210	if (IS_ERR(sc->sc_drm_dev)) {
211		aprint_error_dev(self, "unable to create drm device: %ld\n",
212		    PTR_ERR(sc->sc_drm_dev));
213		sc->sc_drm_dev = NULL;
214		return;
215	}
216
217	/* XXX errno Linux->NetBSD */
218	error = -drm_pci_attach(sc->sc_drm_dev, pa, &sc->sc_pci_dev);
219	if (error) {
220		aprint_error_dev(self, "unable to attach drm: %d\n", error);
221		return;
222	}
223	sc->sc_pci_attached = true;
224
225	/* XXX errno Linux->NetBSD */
226	error = -nouveau_drm_device_init(sc->sc_drm_dev);
227	if (error) {
228		aprint_error_dev(self, "unable to init nouveau: %d\n", error);
229		return;
230	}
231
232	/* XXX errno Linux->NetBSD */
233	error = -drm_dev_register(sc->sc_drm_dev, 0);
234	if (error) {
235		aprint_error_dev(self, "unable to register drm: %d\n", error);
236		return;
237	}
238	sc->sc_dev_registered = true;
239
240	while (!SIMPLEQ_EMPTY(&sc->sc_task_u.attach)) {
241		struct nouveau_pci_task *const task =
242		    SIMPLEQ_FIRST(&sc->sc_task_u.attach);
243
244		SIMPLEQ_REMOVE_HEAD(&sc->sc_task_u.attach, nt_u.queue);
245		(*task->nt_fn)(task);
246	}
247
248	sc->sc_task_state = NOUVEAU_TASK_WORKQUEUE;
249	error = workqueue_create(&sc->sc_task_u.workqueue, "nouveau_pci",
250	    &nouveau_pci_task_work, NULL, PRI_NONE, IPL_NONE, WQ_MPSAFE);
251	if (error) {
252		aprint_error_dev(self, "unable to create workqueue: %d\n",
253		    error);
254		sc->sc_task_u.workqueue = NULL;
255		return;
256	}
257}
258
259static int
260nouveau_pci_detach(device_t self, int flags)
261{
262	struct nouveau_pci_softc *const sc = device_private(self);
263	int error;
264
265	if (sc->sc_dev == NULL)
266		/* Not done attaching.  */
267		return EBUSY;
268
269	/* XXX Check for in-use before tearing it all down...  */
270	error = config_detach_children(self, flags);
271	if (error)
272		return error;
273
274	if (sc->sc_task_state == NOUVEAU_TASK_ATTACH)
275		goto out0;
276	if (sc->sc_task_u.workqueue != NULL) {
277		workqueue_destroy(sc->sc_task_u.workqueue);
278		sc->sc_task_u.workqueue = NULL;
279	}
280
281	if (sc->sc_nv_dev == NULL)
282		goto out0;
283	if (sc->sc_drm_dev == NULL)
284		goto out1;
285	if (!sc->sc_pci_attached)
286		goto out2;
287	if (!sc->sc_dev_registered)
288		goto out3;
289
290	drm_dev_unregister(sc->sc_drm_dev);
291out3:	drm_pci_detach(sc->sc_drm_dev);
292out2:	drm_dev_put(sc->sc_drm_dev);
293	sc->sc_drm_dev = NULL;
294out1:	nvkm_device_del(&sc->sc_nv_dev);
295out0:	linux_pci_dev_destroy(&sc->sc_pci_dev);
296	pmf_device_deregister(self);
297	return 0;
298}
299
300/*
301 * XXX Synchronize with nouveau_do_suspend in nouveau_drm.c.
302 */
303static bool
304nouveau_pci_suspend(device_t self, const pmf_qual_t *qual __unused)
305{
306	struct nouveau_pci_softc *const sc = device_private(self);
307
308	return nouveau_pmops_suspend(sc->sc_drm_dev) == 0;
309}
310
311static bool
312nouveau_pci_resume(device_t self, const pmf_qual_t *qual)
313{
314	struct nouveau_pci_softc *const sc = device_private(self);
315
316	return nouveau_pmops_resume(sc->sc_drm_dev) == 0;
317}
318
319static void
320nouveau_pci_task_work(struct work *work, void *cookie __unused)
321{
322	struct nouveau_pci_task *const task = container_of(work,
323	    struct nouveau_pci_task, nt_u.work);
324
325	(*task->nt_fn)(task);
326}
327
328int
329nouveau_pci_task_schedule(device_t self, struct nouveau_pci_task *task)
330{
331	struct nouveau_pci_softc *const sc = device_private(self);
332
333	switch (sc->sc_task_state) {
334	case NOUVEAU_TASK_ATTACH:
335		SIMPLEQ_INSERT_TAIL(&sc->sc_task_u.attach, task, nt_u.queue);
336		return 0;
337	case NOUVEAU_TASK_WORKQUEUE:
338		if (sc->sc_task_u.workqueue == NULL) {
339			aprint_error_dev(self, "unable to schedule task\n");
340			return EIO;
341		}
342		workqueue_enqueue(sc->sc_task_u.workqueue, &task->nt_u.work,
343		    NULL);
344		return 0;
345	default:
346		panic("nouveau in invalid task state: %d\n",
347		    (int)sc->sc_task_state);
348	}
349}
350
351extern struct drm_driver *const nouveau_drm_driver_stub; /* XXX */
352extern struct drm_driver *const nouveau_drm_driver_pci;	 /* XXX */
353
354static int
355nouveau_pci_modcmd(modcmd_t cmd, void *arg __unused)
356{
357
358	switch (cmd) {
359	case MODULE_CMD_INIT:
360		*nouveau_drm_driver_pci = *nouveau_drm_driver_stub;
361		nouveau_drm_driver_pci->request_irq = drm_pci_request_irq;
362		nouveau_drm_driver_pci->free_irq = drm_pci_free_irq;
363#if 0		/* XXX nouveau acpi */
364		nouveau_register_dsm_handler();
365#endif
366		break;
367	case MODULE_CMD_FINI:
368#if 0		/* XXX nouveau acpi */
369		nouveau_unregister_dsm_handler();
370#endif
371		break;
372	default:
373		return ENOTTY;
374	}
375
376	return 0;
377}
378