nouveau_pci.c revision 1.34 
1/*	$NetBSD: nouveau_pci.c,v 1.34 2021/12/19 12:28:12 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 1.34 2021/12/19 12:28:12 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/atomic.h>
43#include <sys/device.h>
44#include <sys/queue.h>
45#include <sys/workqueue.h>
46#include <sys/module.h>
47
48#ifdef FDT
49#include <dev/fdt/fdtvar.h>
50#endif
51
52#include <drm/drm_pci.h>
53
54#include <core/device.h>
55#include <core/pci.h>
56
57#include "nouveau_drv.h"
58#include "nouveau_pci.h"
59
60struct drm_device;
61
62MODULE(MODULE_CLASS_DRIVER, nouveau_pci, "nouveau,drmkms_pci");
63
64SIMPLEQ_HEAD(nouveau_pci_task_head, nouveau_pci_task);
65
66struct nouveau_pci_softc {
67	device_t		sc_dev;
68	struct pci_attach_args	sc_pa;
69	struct lwp		*sc_task_thread;
70	struct nouveau_pci_task_head sc_tasks;
71	struct workqueue	*sc_task_wq;
72	struct drm_device	*sc_drm_dev;
73	struct pci_dev		sc_pci_dev;
74	struct nvkm_device	*sc_nv_dev;
75	bool			sc_pci_attached;
76	bool			sc_nvdev_inited;
77	bool			sc_dev_registered;
78};
79
80static int	nouveau_pci_match(device_t, cfdata_t, void *);
81static void	nouveau_pci_attach(device_t, device_t, void *);
82static void	nouveau_pci_attach_real(device_t);
83static int	nouveau_pci_detach(device_t, int);
84
85static bool	nouveau_pci_suspend(device_t, const pmf_qual_t *);
86static bool	nouveau_pci_resume(device_t, const pmf_qual_t *);
87
88static void	nouveau_pci_task_work(struct work *, void *);
89
90CFATTACH_DECL_NEW(nouveau_pci, sizeof(struct nouveau_pci_softc),
91    nouveau_pci_match, nouveau_pci_attach, nouveau_pci_detach, NULL);
92
93/* Kludge to get this from nouveau_drm.c.  */
94extern struct drm_driver *const nouveau_drm_driver_pci;
95
96static int
97nouveau_pci_match(device_t parent, cfdata_t match, void *aux)
98{
99	const struct pci_attach_args *const pa = aux;
100	struct pci_dev pdev;
101	struct nvkm_device *device;
102	int ret;
103
104	if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_NVIDIA &&
105	    PCI_VENDOR(pa->pa_id) != PCI_VENDOR_NVIDIA_SGS)
106		return 0;
107
108	if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY)
109		return 0;
110
111	/*
112	 * NetBSD drm2 doesn't support Pascal, Volta or Turing based cards:
113	 *   0x1580-0x15ff 	GP100
114	 *   0x1b00-0x1b7f 	GP102
115	 *   0x1b80-0x1bff 	GP104
116	 *   0x1c00-0x1c7f 	GP106
117	 *   0x1c80-0x1cff 	GP107
118	 *   0x1d00-0x1d7f 	GP108
119	 *   0x1d80-0x1dff 	GV100
120	 *   0x1e00-0x1e7f 	TU102
121	 *   0x1e80-0x1eff 	TU104
122	 *   0x1f00-0x1f7f 	TU106
123	 *   0x1f80-0x1fff 	TU117
124	 *   0x2180-0x21ff 	TU116
125	 *
126	 * reduce this to >= 1580, so that new chipsets not explictly
127	 * listed above will be picked up.
128	 *
129	 * XXX perhaps switch this to explicitly match known list.
130	 */
131	if (PCI_PRODUCT(pa->pa_id) >= 0x1580)
132		return 0;
133
134	linux_pci_dev_init(&pdev, parent /* XXX bogus */, parent, pa, 0);
135	ret = nvkm_device_pci_new(&pdev, NULL, "error",
136	    /* detect */ true, /* mmio */ false, /* subdev_mask */ 0, &device);
137	if (ret == 0)		/* don't want to hang onto it */
138		nvkm_device_del(&device);
139	linux_pci_dev_destroy(&pdev);
140	if (ret)		/* failure */
141		return 0;
142
143	return 6;		/* XXX Beat genfb_pci...  */
144}
145
146extern char *nouveau_config;
147extern char *nouveau_debug;
148
149static void
150nouveau_pci_attach(device_t parent, device_t self, void *aux)
151{
152	struct nouveau_pci_softc *const sc = device_private(self);
153	const struct pci_attach_args *const pa = aux;
154	int error;
155
156	pci_aprint_devinfo(pa, NULL);
157
158	/* Initialize the Linux PCI device descriptor.  */
159	linux_pci_dev_init(&sc->sc_pci_dev, self, device_parent(self), pa, 0);
160
161	sc->sc_dev = self;
162	sc->sc_pa = *pa;
163	sc->sc_task_thread = NULL;
164	SIMPLEQ_INIT(&sc->sc_tasks);
165	error = workqueue_create(&sc->sc_task_wq, "nouveau_pci",
166	    &nouveau_pci_task_work, NULL, PRI_NONE, IPL_NONE, WQ_MPSAFE);
167	if (error) {
168		aprint_error_dev(self, "unable to create workqueue: %d\n",
169		    error);
170		sc->sc_task_wq = NULL;
171		return;
172	}
173
174#ifdef FDT
175	/*
176	 * XXX Remove the simple framebuffer, assuming that this device
177	 * will take over.
178	 */
179	const char *fb_compatible[] = { "simple-framebuffer", NULL };
180	fdt_remove_bycompat(fb_compatible);
181#endif
182
183	/*
184	 * Defer the remainder of initialization until we have mounted
185	 * the root file system and can load firmware images.
186	 */
187	config_mountroot(self, &nouveau_pci_attach_real);
188}
189
190static void
191nouveau_pci_attach_real(device_t self)
192{
193	struct nouveau_pci_softc *const sc = device_private(self);
194	int error;
195
196	/*
197	 * Cause any tasks issued synchronously during attach to be
198	 * processed at the end of this function.
199	 */
200	sc->sc_task_thread = curlwp;
201
202	/* XXX errno Linux->NetBSD */
203	error = -nvkm_device_pci_new(&sc->sc_pci_dev,
204	    nouveau_config, nouveau_debug,
205	    /* detect */ true, /* mmio */ true, /* subdev_mask */ ~0ULL,
206	    &sc->sc_nv_dev);
207	if (error) {
208		aprint_error_dev(self, "unable to create nouveau device: %d\n",
209		    error);
210		sc->sc_nv_dev = NULL;
211		goto out;
212	}
213
214	sc->sc_drm_dev = drm_dev_alloc(nouveau_drm_driver_pci, self);
215	if (IS_ERR(sc->sc_drm_dev)) {
216		aprint_error_dev(self, "unable to create drm device: %ld\n",
217		    PTR_ERR(sc->sc_drm_dev));
218		sc->sc_drm_dev = NULL;
219		goto out;
220	}
221
222	/* XXX errno Linux->NetBSD */
223	error = -drm_pci_attach(sc->sc_drm_dev, &sc->sc_pci_dev);
224	if (error) {
225		aprint_error_dev(self, "unable to attach drm: %d\n", error);
226		goto out;
227	}
228	sc->sc_pci_attached = true;
229
230	/* XXX errno Linux->NetBSD */
231	error = -nouveau_drm_device_init(sc->sc_drm_dev);
232	if (error) {
233		aprint_error_dev(self, "unable to init nouveau: %d\n", error);
234		goto out;
235	}
236	sc->sc_nvdev_inited = true;
237
238	/* XXX errno Linux->NetBSD */
239	error = -drm_dev_register(sc->sc_drm_dev, 0);
240	if (error) {
241		aprint_error_dev(self, "unable to register drm: %d\n", error);
242		goto out;
243	}
244	sc->sc_dev_registered = true;
245
246	if (!pmf_device_register(self, &nouveau_pci_suspend,
247		&nouveau_pci_resume))
248		aprint_error_dev(self, "unable to establish power handler\n");
249
250	while (!SIMPLEQ_EMPTY(&sc->sc_tasks)) {
251		struct nouveau_pci_task *const task =
252		    SIMPLEQ_FIRST(&sc->sc_tasks);
253
254		SIMPLEQ_REMOVE_HEAD(&sc->sc_tasks, nt_u.queue);
255		(*task->nt_fn)(task);
256	}
257
258out:	/* Cause any subesquent tasks to be processed by the workqueue.  */
259	atomic_store_relaxed(&sc->sc_task_thread, NULL);
260}
261
262static int
263nouveau_pci_detach(device_t self, int flags)
264{
265	struct nouveau_pci_softc *const sc = device_private(self);
266	int error;
267
268	/* XXX Check for in-use before tearing it all down...  */
269	error = config_detach_children(self, flags);
270	if (error)
271		return error;
272
273	pmf_device_deregister(self);
274	if (sc->sc_dev_registered)
275		drm_dev_unregister(sc->sc_drm_dev);
276	if (sc->sc_nvdev_inited)
277		nouveau_drm_device_fini(sc->sc_drm_dev);
278	if (sc->sc_pci_attached)
279		drm_pci_detach(sc->sc_drm_dev);
280	if (sc->sc_drm_dev) {
281		drm_dev_put(sc->sc_drm_dev);
282		sc->sc_drm_dev = NULL;
283	}
284	if (sc->sc_nv_dev)
285		nvkm_device_del(&sc->sc_nv_dev);
286	if (sc->sc_task_wq) {
287		workqueue_destroy(sc->sc_task_wq);
288		sc->sc_task_wq = NULL;
289	}
290	linux_pci_dev_destroy(&sc->sc_pci_dev);
291
292	return 0;
293}
294
295/*
296 * XXX Synchronize with nouveau_do_suspend in nouveau_drm.c.
297 */
298static bool
299nouveau_pci_suspend(device_t self, const pmf_qual_t *qual __unused)
300{
301	struct nouveau_pci_softc *const sc = device_private(self);
302
303	return nouveau_pmops_suspend(sc->sc_drm_dev) == 0;
304}
305
306static bool
307nouveau_pci_resume(device_t self, const pmf_qual_t *qual)
308{
309	struct nouveau_pci_softc *const sc = device_private(self);
310
311	return nouveau_pmops_resume(sc->sc_drm_dev) == 0;
312}
313
314static void
315nouveau_pci_task_work(struct work *work, void *cookie __unused)
316{
317	struct nouveau_pci_task *const task = container_of(work,
318	    struct nouveau_pci_task, nt_u.work);
319
320	(*task->nt_fn)(task);
321}
322
323int
324nouveau_pci_task_schedule(device_t self, struct nouveau_pci_task *task)
325{
326	struct nouveau_pci_softc *const sc = device_private(self);
327
328	if (atomic_load_relaxed(&sc->sc_task_thread) == curlwp)
329		SIMPLEQ_INSERT_TAIL(&sc->sc_tasks, task, nt_u.queue);
330	else
331		workqueue_enqueue(sc->sc_task_wq, &task->nt_u.work, NULL);
332
333	return 0;
334}
335
336extern struct drm_driver *const nouveau_drm_driver_stub; /* XXX */
337extern struct drm_driver *const nouveau_drm_driver_pci;	 /* XXX */
338
339static int
340nouveau_pci_modcmd(modcmd_t cmd, void *arg __unused)
341{
342
343	switch (cmd) {
344	case MODULE_CMD_INIT:
345		*nouveau_drm_driver_pci = *nouveau_drm_driver_stub;
346		nouveau_drm_driver_pci->request_irq = drm_pci_request_irq;
347		nouveau_drm_driver_pci->free_irq = drm_pci_free_irq;
348#if 0		/* XXX nouveau acpi */
349		nouveau_register_dsm_handler();
350#endif
351		break;
352	case MODULE_CMD_FINI:
353#if 0		/* XXX nouveau acpi */
354		nouveau_unregister_dsm_handler();
355#endif
356		break;
357	default:
358		return ENOTTY;
359	}
360
361	return 0;
362}
363