nouveau_nvkm_subdev_instmem_nv50.c revision 1.1 
1/*	$NetBSD: nouveau_nvkm_subdev_instmem_nv50.c,v 1.1 2018/08/27 01:34:56 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 1.1 2018/08/27 01:34:56 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
37struct nv50_instmem {
38	struct nvkm_instmem base;
39	unsigned long lock_flags;
40	spinlock_t lock;
41	u64 addr;
42};
43
44/******************************************************************************
45 * instmem object implementation
46 *****************************************************************************/
47#define nv50_instobj(p) container_of((p), struct nv50_instobj, memory)
48
49struct nv50_instobj {
50	struct nvkm_memory memory;
51	struct nv50_instmem *imem;
52	struct nvkm_mem *mem;
53	struct nvkm_vma bar;
54	void *map;
55};
56
57static enum nvkm_memory_target
58nv50_instobj_target(struct nvkm_memory *memory)
59{
60	return NVKM_MEM_TARGET_VRAM;
61}
62
63static u64
64nv50_instobj_addr(struct nvkm_memory *memory)
65{
66	return nv50_instobj(memory)->mem->offset;
67}
68
69static u64
70nv50_instobj_size(struct nvkm_memory *memory)
71{
72	return (u64)nv50_instobj(memory)->mem->size << NVKM_RAM_MM_SHIFT;
73}
74
75static void
76nv50_instobj_boot(struct nvkm_memory *memory, struct nvkm_vm *vm)
77{
78	struct nv50_instobj *iobj = nv50_instobj(memory);
79	struct nvkm_subdev *subdev = &iobj->imem->base.subdev;
80	struct nvkm_device *device = subdev->device;
81	u64 size = nvkm_memory_size(memory);
82	void __iomem *map;
83	int ret;
84
85	iobj->map = ERR_PTR(-ENOMEM);
86
87	ret = nvkm_vm_get(vm, size, 12, NV_MEM_ACCESS_RW, &iobj->bar);
88	if (ret == 0) {
89		map = ioremap(device->func->resource_addr(device, 3) +
90			      (u32)iobj->bar.offset, size);
91		if (map) {
92			nvkm_memory_map(memory, &iobj->bar, 0);
93			iobj->map = map;
94		} else {
95			nvkm_warn(subdev, "PRAMIN ioremap failed\n");
96			nvkm_vm_put(&iobj->bar);
97		}
98	} else {
99		nvkm_warn(subdev, "PRAMIN exhausted\n");
100	}
101}
102
103static void
104nv50_instobj_release(struct nvkm_memory *memory)
105{
106	struct nv50_instmem *imem = nv50_instobj(memory)->imem;
107	spin_unlock_irqrestore(&imem->lock, imem->lock_flags);
108}
109
110static void __iomem *
111nv50_instobj_acquire(struct nvkm_memory *memory)
112{
113	struct nv50_instobj *iobj = nv50_instobj(memory);
114	struct nv50_instmem *imem = iobj->imem;
115	struct nvkm_bar *bar = imem->base.subdev.device->bar;
116	struct nvkm_vm *vm;
117	unsigned long flags;
118
119	if (!iobj->map && (vm = nvkm_bar_kmap(bar)))
120		nvkm_memory_boot(memory, vm);
121	if (!IS_ERR_OR_NULL(iobj->map))
122		return iobj->map;
123
124	spin_lock_irqsave(&imem->lock, flags);
125	imem->lock_flags = flags;
126	return NULL;
127}
128
129static u32
130nv50_instobj_rd32(struct nvkm_memory *memory, u64 offset)
131{
132	struct nv50_instobj *iobj = nv50_instobj(memory);
133	struct nv50_instmem *imem = iobj->imem;
134	struct nvkm_device *device = imem->base.subdev.device;
135	u64 base = (iobj->mem->offset + offset) & 0xffffff00000ULL;
136	u64 addr = (iobj->mem->offset + offset) & 0x000000fffffULL;
137	u32 data;
138
139	if (unlikely(imem->addr != base)) {
140		nvkm_wr32(device, 0x001700, base >> 16);
141		imem->addr = base;
142	}
143	data = nvkm_rd32(device, 0x700000 + addr);
144	return data;
145}
146
147static void
148nv50_instobj_wr32(struct nvkm_memory *memory, u64 offset, u32 data)
149{
150	struct nv50_instobj *iobj = nv50_instobj(memory);
151	struct nv50_instmem *imem = iobj->imem;
152	struct nvkm_device *device = imem->base.subdev.device;
153	u64 base = (iobj->mem->offset + offset) & 0xffffff00000ULL;
154	u64 addr = (iobj->mem->offset + offset) & 0x000000fffffULL;
155
156	if (unlikely(imem->addr != base)) {
157		nvkm_wr32(device, 0x001700, base >> 16);
158		imem->addr = base;
159	}
160	nvkm_wr32(device, 0x700000 + addr, data);
161}
162
163static void
164nv50_instobj_map(struct nvkm_memory *memory, struct nvkm_vma *vma, u64 offset)
165{
166	struct nv50_instobj *iobj = nv50_instobj(memory);
167	nvkm_vm_map_at(vma, offset, iobj->mem);
168}
169
170static void *
171nv50_instobj_dtor(struct nvkm_memory *memory)
172{
173	struct nv50_instobj *iobj = nv50_instobj(memory);
174	struct nvkm_ram *ram = iobj->imem->base.subdev.device->fb->ram;
175	if (!IS_ERR_OR_NULL(iobj->map)) {
176		nvkm_vm_put(&iobj->bar);
177		iounmap(iobj->map);
178	}
179	ram->func->put(ram, &iobj->mem);
180	return iobj;
181}
182
183static const struct nvkm_memory_func
184nv50_instobj_func = {
185	.dtor = nv50_instobj_dtor,
186	.target = nv50_instobj_target,
187	.size = nv50_instobj_size,
188	.addr = nv50_instobj_addr,
189	.boot = nv50_instobj_boot,
190	.acquire = nv50_instobj_acquire,
191	.release = nv50_instobj_release,
192	.rd32 = nv50_instobj_rd32,
193	.wr32 = nv50_instobj_wr32,
194	.map = nv50_instobj_map,
195};
196
197static int
198nv50_instobj_new(struct nvkm_instmem *base, u32 size, u32 align, bool zero,
199		 struct nvkm_memory **pmemory)
200{
201	struct nv50_instmem *imem = nv50_instmem(base);
202	struct nv50_instobj *iobj;
203	struct nvkm_ram *ram = imem->base.subdev.device->fb->ram;
204	int ret;
205
206	if (!(iobj = kzalloc(sizeof(*iobj), GFP_KERNEL)))
207		return -ENOMEM;
208	*pmemory = &iobj->memory;
209
210	nvkm_memory_ctor(&nv50_instobj_func, &iobj->memory);
211	iobj->imem = imem;
212
213	size  = max((size  + 4095) & ~4095, (u32)4096);
214	align = max((align + 4095) & ~4095, (u32)4096);
215
216	ret = ram->func->get(ram, size, align, 0, 0x800, &iobj->mem);
217	if (ret)
218		return ret;
219
220	iobj->mem->page_shift = 12;
221	return 0;
222}
223
224/******************************************************************************
225 * instmem subdev implementation
226 *****************************************************************************/
227
228static void
229nv50_instmem_fini(struct nvkm_instmem *base)
230{
231	nv50_instmem(base)->addr = ~0ULL;
232}
233
234static const struct nvkm_instmem_func
235nv50_instmem = {
236	.fini = nv50_instmem_fini,
237	.memory_new = nv50_instobj_new,
238	.persistent = false,
239	.zero = false,
240};
241
242int
243nv50_instmem_new(struct nvkm_device *device, int index,
244		 struct nvkm_instmem **pimem)
245{
246	struct nv50_instmem *imem;
247
248	if (!(imem = kzalloc(sizeof(*imem), GFP_KERNEL)))
249		return -ENOMEM;
250	nvkm_instmem_ctor(&nv50_instmem, device, index, &imem->base);
251	spin_lock_init(&imem->lock);
252	*pimem = &imem->base;
253	return 0;
254}
255