nouveau_nvkm_subdev_instmem_nv50.c revision 1.4 
1/*	$NetBSD: nouveau_nvkm_subdev_instmem_nv50.c,v 1.4 2018/08/27 07:36:28 riastradh Exp $	*/
2
3/*
4 * Copyright 2012 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
25 */
26#include <sys/cdefs.h>
27__KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_instmem_nv50.c,v 1.4 2018/08/27 07:36:28 riastradh Exp $");
28
29#define nv50_instmem(p) container_of((p), struct nv50_instmem, base)
30#include "priv.h"
31
32#include <core/memory.h>
33#include <subdev/bar.h>
34#include <subdev/fb.h>
35#include <subdev/mmu.h>
36
37#ifdef __NetBSD__
38#  define	__iomem	__nvkm_memory_iomem
39#endif
40
41struct nv50_instmem {
42	struct nvkm_instmem base;
43	unsigned long lock_flags;
44	spinlock_t lock;
45	u64 addr;
46};
47
48/******************************************************************************
49 * instmem object implementation
50 *****************************************************************************/
51#define nv50_instobj(p) container_of((p), struct nv50_instobj, memory)
52
53struct nv50_instobj {
54	struct nvkm_memory memory;
55	struct nv50_instmem *imem;
56	struct nvkm_mem *mem;
57	struct nvkm_vma bar;
58#ifdef __NetBSD__
59	bus_space_tag_t bst;
60	bus_space_handle_t bsh;
61#endif
62	void *map;
63};
64
65static enum nvkm_memory_target
66nv50_instobj_target(struct nvkm_memory *memory)
67{
68	return NVKM_MEM_TARGET_VRAM;
69}
70
71static u64
72nv50_instobj_addr(struct nvkm_memory *memory)
73{
74	return nv50_instobj(memory)->mem->offset;
75}
76
77static u64
78nv50_instobj_size(struct nvkm_memory *memory)
79{
80	return (u64)nv50_instobj(memory)->mem->size << NVKM_RAM_MM_SHIFT;
81}
82
83static void
84nv50_instobj_boot(struct nvkm_memory *memory, struct nvkm_vm *vm)
85{
86	struct nv50_instobj *iobj = nv50_instobj(memory);
87	struct nvkm_subdev *subdev = &iobj->imem->base.subdev;
88	struct nvkm_device *device = subdev->device;
89	u64 size = nvkm_memory_size(memory);
90#ifndef __NetBSD__
91	void __iomem *map;
92#endif
93	int ret;
94
95	iobj->map = ERR_PTR(-ENOMEM);
96
97	ret = nvkm_vm_get(vm, size, 12, NV_MEM_ACCESS_RW, &iobj->bar);
98	if (ret == 0) {
99#ifdef __NetBSD__
100		bus_space_tag_t bst = device->func->resource_tag(device, 3);
101		bus_space_handle_t bsh;
102		int ret;
103
104		/* Yes, truncation is really intended here.  */
105		/* XXX errno NetBSD->Linux */
106		ret = -bus_space_map(bst, (u32)iobj->bar.offset, size,
107		    BUS_SPACE_MAP_LINEAR, &bsh);
108		if (ret == 0) {
109			nvkm_memory_map(memory, &iobj->bar, 0);
110			iobj->bst = bst;
111			iobj->bsh = bsh;
112			iobj->map = bus_space_vaddr(bst, bsh);
113		} else {
114			nvkm_warn(subdev, "PRAMIN bus_space_map failed: %d\n",
115			    ret);
116			nvkm_vm_put(&iobj->bar);
117		}
118#else
119		map = ioremap(device->func->resource_addr(device, 3) +
120			      (u32)iobj->bar.offset, size);
121		if (map) {
122			nvkm_memory_map(memory, &iobj->bar, 0);
123			iobj->map = map;
124		} else {
125			nvkm_warn(subdev, "PRAMIN ioremap failed\n");
126			nvkm_vm_put(&iobj->bar);
127		}
128#endif
129	} else {
130		nvkm_warn(subdev, "PRAMIN exhausted\n");
131	}
132}
133
134static void
135nv50_instobj_release(struct nvkm_memory *memory)
136{
137	struct nv50_instmem *imem = nv50_instobj(memory)->imem;
138	spin_unlock_irqrestore(&imem->lock, imem->lock_flags);
139}
140
141static void __iomem *
142nv50_instobj_acquire(struct nvkm_memory *memory)
143{
144	struct nv50_instobj *iobj = nv50_instobj(memory);
145	struct nv50_instmem *imem = iobj->imem;
146	struct nvkm_bar *bar = imem->base.subdev.device->bar;
147	struct nvkm_vm *vm;
148	unsigned long flags;
149
150	if (!iobj->map && (vm = nvkm_bar_kmap(bar)))
151		nvkm_memory_boot(memory, vm);
152	if (!IS_ERR_OR_NULL(iobj->map))
153		return iobj->map;
154
155	spin_lock_irqsave(&imem->lock, flags);
156	imem->lock_flags = flags;
157	return NULL;
158}
159
160static u32
161nv50_instobj_rd32(struct nvkm_memory *memory, u64 offset)
162{
163	struct nv50_instobj *iobj = nv50_instobj(memory);
164	struct nv50_instmem *imem = iobj->imem;
165	struct nvkm_device *device = imem->base.subdev.device;
166	u64 base = (iobj->mem->offset + offset) & 0xffffff00000ULL;
167	u64 addr = (iobj->mem->offset + offset) & 0x000000fffffULL;
168	u32 data;
169
170	if (unlikely(imem->addr != base)) {
171		nvkm_wr32(device, 0x001700, base >> 16);
172		imem->addr = base;
173	}
174	data = nvkm_rd32(device, 0x700000 + addr);
175	return data;
176}
177
178static void
179nv50_instobj_wr32(struct nvkm_memory *memory, u64 offset, u32 data)
180{
181	struct nv50_instobj *iobj = nv50_instobj(memory);
182	struct nv50_instmem *imem = iobj->imem;
183	struct nvkm_device *device = imem->base.subdev.device;
184	u64 base = (iobj->mem->offset + offset) & 0xffffff00000ULL;
185	u64 addr = (iobj->mem->offset + offset) & 0x000000fffffULL;
186
187	if (unlikely(imem->addr != base)) {
188		nvkm_wr32(device, 0x001700, base >> 16);
189		imem->addr = base;
190	}
191	nvkm_wr32(device, 0x700000 + addr, data);
192}
193
194static void
195nv50_instobj_map(struct nvkm_memory *memory, struct nvkm_vma *vma, u64 offset)
196{
197	struct nv50_instobj *iobj = nv50_instobj(memory);
198	nvkm_vm_map_at(vma, offset, iobj->mem);
199}
200
201static void *
202nv50_instobj_dtor(struct nvkm_memory *memory)
203{
204	struct nv50_instobj *iobj = nv50_instobj(memory);
205	struct nvkm_ram *ram = iobj->imem->base.subdev.device->fb->ram;
206	if (!IS_ERR_OR_NULL(iobj->map)) {
207		nvkm_vm_put(&iobj->bar);
208#ifdef __NetBSD__
209		bus_space_unmap(iobj->bst, iobj->bsh,
210		    nvkm_memory_size(&iobj->memory));
211		iobj->map = NULL;
212#else
213		iounmap(iobj->map);
214#endif
215	}
216	ram->func->put(ram, &iobj->mem);
217	return iobj;
218}
219
220static const struct nvkm_memory_func
221nv50_instobj_func = {
222	.dtor = nv50_instobj_dtor,
223	.target = nv50_instobj_target,
224	.size = nv50_instobj_size,
225	.addr = nv50_instobj_addr,
226	.boot = nv50_instobj_boot,
227	.acquire = nv50_instobj_acquire,
228	.release = nv50_instobj_release,
229	.rd32 = nv50_instobj_rd32,
230	.wr32 = nv50_instobj_wr32,
231	.map = nv50_instobj_map,
232};
233
234static int
235nv50_instobj_new(struct nvkm_instmem *base, u32 size, u32 align, bool zero,
236		 struct nvkm_memory **pmemory)
237{
238	struct nv50_instmem *imem = nv50_instmem(base);
239	struct nv50_instobj *iobj;
240	struct nvkm_ram *ram = imem->base.subdev.device->fb->ram;
241	int ret;
242
243	if (!(iobj = kzalloc(sizeof(*iobj), GFP_KERNEL)))
244		return -ENOMEM;
245	*pmemory = &iobj->memory;
246
247	nvkm_memory_ctor(&nv50_instobj_func, &iobj->memory);
248	iobj->imem = imem;
249
250	size  = max((size  + 4095) & ~4095, (u32)4096);
251	align = max((align + 4095) & ~4095, (u32)4096);
252
253	ret = ram->func->get(ram, size, align, 0, 0x800, &iobj->mem);
254	if (ret)
255		return ret;
256
257	iobj->mem->page_shift = 12;
258	return 0;
259}
260
261/******************************************************************************
262 * instmem subdev implementation
263 *****************************************************************************/
264
265static void
266nv50_instmem_fini(struct nvkm_instmem *base)
267{
268	nv50_instmem(base)->addr = ~0ULL;
269}
270
271static const struct nvkm_instmem_func
272nv50_instmem = {
273	.fini = nv50_instmem_fini,
274	.memory_new = nv50_instobj_new,
275	.persistent = false,
276	.zero = false,
277};
278
279int
280nv50_instmem_new(struct nvkm_device *device, int index,
281		 struct nvkm_instmem **pimem)
282{
283	struct nv50_instmem *imem;
284
285	if (!(imem = kzalloc(sizeof(*imem), GFP_KERNEL)))
286		return -ENOMEM;
287	nvkm_instmem_ctor(&nv50_instmem, device, index, &imem->base);
288	spin_lock_init(&imem->lock);
289	*pimem = &imem->base;
290	return 0;
291}
292