1/*	$NetBSD: nouveau_nvif.c,v 1.6 2021/12/18 23:45:32 riastradh Exp $	*/
2
3/*
4 * Copyright 2014 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs <bskeggs@redhat.com>
25 */
26
27/*******************************************************************************
28 * NVIF client driver - NVKM directly linked
29 ******************************************************************************/
30
31#include <sys/cdefs.h>
32__KERNEL_RCSID(0, "$NetBSD: nouveau_nvif.c,v 1.6 2021/12/18 23:45:32 riastradh Exp $");
33
34#include <core/client.h>
35#include <core/notify.h>
36#include <core/ioctl.h>
37
38#include <nvif/client.h>
39#include <nvif/driver.h>
40#include <nvif/notify.h>
41#include <nvif/event.h>
42#include <nvif/ioctl.h>
43
44#include "nouveau_drv.h"
45#include "nouveau_usif.h"
46
47#ifdef __NetBSD__
48#define	__iomem	__nvif_iomem
49static int
50nvkm_client_map(void *priv, bus_space_tag_t tag, u64 busaddr, u32 size,
51    bus_space_handle_t *handlep, void __iomem **ptrp)
52{
53	struct nvkm_client *client = nvxx_client(priv);
54	int ret;
55
56	if (tag == client->mmiot &&
57	    client->mmioaddr <= busaddr &&
58	    busaddr - client->mmioaddr <= client->mmiosz) {
59		const bus_size_t offset = busaddr - client->mmioaddr;
60		if (size > client->mmiosz - offset) {
61			DRM_ERROR("Invalid register access\n");
62			return -EFAULT;
63		}
64		ret = -bus_space_subregion(client->mmiot, client->mmioh,
65		    offset, size, handlep);
66		if (ret)
67			return ret;
68		*ptrp = bus_space_vaddr(tag, *handlep);
69		return 0;
70	}
71
72	ret = -bus_space_map(tag, busaddr, size, BUS_SPACE_MAP_LINEAR,
73	    handlep);
74	if (ret)
75		return ret;
76	*ptrp = bus_space_vaddr(tag, *handlep);
77	return 0;
78}
79
80static void
81nvkm_client_unmap(void *priv, bus_space_tag_t tag, bus_space_handle_t handle,
82    bus_addr_t busaddr, void __iomem *ptr, u32 size)
83{
84	struct nvkm_client *client = nvxx_client(priv);
85
86	KASSERTMSG(ptr == bus_space_vaddr(tag, handle),
87	    "nvkm_client ptr %p != %p [bus_space_vaddr(%p, %"PRIxVADDR")]",
88	    ptr, bus_space_vaddr(tag, handle), tag, handle);
89
90	if (tag == client->mmiot &&
91	    client->mmioaddr <= busaddr &&
92	    busaddr - client->mmioaddr <= client->mmiosz) {
93		__diagused const bus_size_t offset = busaddr - client->mmioaddr;
94		KASSERT(size <= client->mmiosz - offset);
95		/* Nothing to do to release a subregion.  */
96		return;
97	}
98
99	bus_space_unmap(tag, handle, size);
100}
101#else
102static void
103nvkm_client_unmap(void *priv, void __iomem *ptr, u32 size)
104{
105	iounmap(ptr);
106}
107
108static void __iomem *
109nvkm_client_map(void *priv, u64 handle, u32 size)
110{
111	return ioremap(handle, size);
112}
113#endif
114
115static int
116nvkm_client_ioctl(void *priv, bool super, void *data, u32 size, void **hack)
117{
118	return nvkm_ioctl(priv, super, data, size, hack);
119}
120
121static int
122nvkm_client_resume(void *priv)
123{
124	struct nvkm_client *client = priv;
125	return nvkm_object_init(&client->object);
126}
127
128static int
129nvkm_client_suspend(void *priv)
130{
131	struct nvkm_client *client = priv;
132	return nvkm_object_fini(&client->object, true);
133}
134
135static int
136nvkm_client_ntfy(const void *header, u32 length, const void *data, u32 size)
137{
138	const union {
139		struct nvif_notify_req_v0 v0;
140	} *args = header;
141	u8 route;
142
143	if (length == sizeof(args->v0) && args->v0.version == 0) {
144		route = args->v0.route;
145	} else {
146		WARN_ON(1);
147		return NVKM_NOTIFY_DROP;
148	}
149
150	switch (route) {
151	case NVDRM_NOTIFY_NVIF:
152		return nvif_notify(header, length, data, size);
153	case NVDRM_NOTIFY_USIF:
154		return usif_notify(header, length, data, size);
155	default:
156		WARN_ON(1);
157		break;
158	}
159
160	return NVKM_NOTIFY_DROP;
161}
162
163static int
164nvkm_client_driver_init(const char *name, u64 device, const char *cfg,
165			const char *dbg, void **ppriv)
166{
167	return nvkm_client_new(name, device, cfg, dbg, nvkm_client_ntfy,
168			       (struct nvkm_client **)ppriv);
169}
170
171const struct nvif_driver
172nvif_driver_nvkm = {
173	.name = "nvkm",
174	.init = nvkm_client_driver_init,
175	.suspend = nvkm_client_suspend,
176	.resume = nvkm_client_resume,
177	.ioctl = nvkm_client_ioctl,
178	.map = nvkm_client_map,
179	.unmap = nvkm_client_unmap,
180	.keep = false,
181};
182