nouveau_nvkm_subdev_instmem_nv50.c revision 1.3 
1/*	$NetBSD: nouveau_nvkm_subdev_instmem_nv50.c,v 1.3 2018/08/27 06:36:48 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 1.3 2018/08/27 06:36:48 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#ifdef __NetBSD__
55	bus_space_tag_t bst;
56	bus_space_handle_t bsh;
57#endif
58	void *map;
59};
60
61static enum nvkm_memory_target
62nv50_instobj_target(struct nvkm_memory *memory)
63{
64	return NVKM_MEM_TARGET_VRAM;
65}
66
67static u64
68nv50_instobj_addr(struct nvkm_memory *memory)
69{
70	return nv50_instobj(memory)->mem->offset;
71}
72
73static u64
74nv50_instobj_size(struct nvkm_memory *memory)
75{
76	return (u64)nv50_instobj(memory)->mem->size << NVKM_RAM_MM_SHIFT;
77}
78
79static void
80nv50_instobj_boot(struct nvkm_memory *memory, struct nvkm_vm *vm)
81{
82	struct nv50_instobj *iobj = nv50_instobj(memory);
83	struct nvkm_subdev *subdev = &iobj->imem->base.subdev;
84	struct nvkm_device *device = subdev->device;
85	u64 size = nvkm_memory_size(memory);
86	void __iomem *map;
87	int ret;
88
89	iobj->map = ERR_PTR(-ENOMEM);
90
91	ret = nvkm_vm_get(vm, size, 12, NV_MEM_ACCESS_RW, &iobj->bar);
92	if (ret == 0) {
93#ifdef __NetBSD__
94		bus_space_tag_t bst = device->func->resource_tag(device, 3);
95		bus_space_handle_t bsh;
96		int ret;
97
98		/* Yes, truncation is really intended here.  */
99		/* XXX errno NetBSD->Linux */
100		ret = -bus_space_map(bst, (u32)iobj->bar.offset, size,
101		    BUS_SPACE_MAP_LINEAR, &bsh);
102		if (ret == 0) {
103			nvkm_memory_map(memory, &iobj->bar, 0);
104			iobj->bst = bst;
105			iobj->bsh = bsh;
106			iobj->map = bus_space_vaddr(bst, bsh);
107		} else {
108			nvkm_warn(subdev, "PRAMIN bus_space_map failed: %d\n",
109			    ret);
110			nvkm_vm_put(&iobj->bar);
111		}
112#else
113		map = ioremap(device->func->resource_addr(device, 3) +
114			      (u32)iobj->bar.offset, size);
115		if (map) {
116			nvkm_memory_map(memory, &iobj->bar, 0);
117			iobj->map = map;
118		} else {
119			nvkm_warn(subdev, "PRAMIN ioremap failed\n");
120			nvkm_vm_put(&iobj->bar);
121		}
122#endif
123	} else {
124		nvkm_warn(subdev, "PRAMIN exhausted\n");
125	}
126}
127
128static void
129nv50_instobj_release(struct nvkm_memory *memory)
130{
131	struct nv50_instmem *imem = nv50_instobj(memory)->imem;
132	spin_unlock_irqrestore(&imem->lock, imem->lock_flags);
133}
134
135static void __iomem *
136nv50_instobj_acquire(struct nvkm_memory *memory)
137{
138	struct nv50_instobj *iobj = nv50_instobj(memory);
139	struct nv50_instmem *imem = iobj->imem;
140	struct nvkm_bar *bar = imem->base.subdev.device->bar;
141	struct nvkm_vm *vm;
142	unsigned long flags;
143
144	if (!iobj->map && (vm = nvkm_bar_kmap(bar)))
145		nvkm_memory_boot(memory, vm);
146	if (!IS_ERR_OR_NULL(iobj->map))
147		return iobj->map;
148
149	spin_lock_irqsave(&imem->lock, flags);
150	imem->lock_flags = flags;
151	return NULL;
152}
153
154static u32
155nv50_instobj_rd32(struct nvkm_memory *memory, u64 offset)
156{
157	struct nv50_instobj *iobj = nv50_instobj(memory);
158	struct nv50_instmem *imem = iobj->imem;
159	struct nvkm_device *device = imem->base.subdev.device;
160	u64 base = (iobj->mem->offset + offset) & 0xffffff00000ULL;
161	u64 addr = (iobj->mem->offset + offset) & 0x000000fffffULL;
162	u32 data;
163
164	if (unlikely(imem->addr != base)) {
165		nvkm_wr32(device, 0x001700, base >> 16);
166		imem->addr = base;
167	}
168	data = nvkm_rd32(device, 0x700000 + addr);
169	return data;
170}
171
172static void
173nv50_instobj_wr32(struct nvkm_memory *memory, u64 offset, u32 data)
174{
175	struct nv50_instobj *iobj = nv50_instobj(memory);
176	struct nv50_instmem *imem = iobj->imem;
177	struct nvkm_device *device = imem->base.subdev.device;
178	u64 base = (iobj->mem->offset + offset) & 0xffffff00000ULL;
179	u64 addr = (iobj->mem->offset + offset) & 0x000000fffffULL;
180
181	if (unlikely(imem->addr != base)) {
182		nvkm_wr32(device, 0x001700, base >> 16);
183		imem->addr = base;
184	}
185	nvkm_wr32(device, 0x700000 + addr, data);
186}
187
188static void
189nv50_instobj_map(struct nvkm_memory *memory, struct nvkm_vma *vma, u64 offset)
190{
191	struct nv50_instobj *iobj = nv50_instobj(memory);
192	nvkm_vm_map_at(vma, offset, iobj->mem);
193}
194
195static void *
196nv50_instobj_dtor(struct nvkm_memory *memory)
197{
198	struct nv50_instobj *iobj = nv50_instobj(memory);
199	struct nvkm_ram *ram = iobj->imem->base.subdev.device->fb->ram;
200	if (!IS_ERR_OR_NULL(iobj->map)) {
201		nvkm_vm_put(&iobj->bar);
202#ifdef __NetBSD__
203		bus_space_unmap(iobj->bst, iobj->bsh,
204		    nvkm_memory_size(iobj->memory));
205		iobj->map = NULL;
206#else
207		iounmap(iobj->map);
208#endif
209	}
210	ram->func->put(ram, &iobj->mem);
211	return iobj;
212}
213
214static const struct nvkm_memory_func
215nv50_instobj_func = {
216	.dtor = nv50_instobj_dtor,
217	.target = nv50_instobj_target,
218	.size = nv50_instobj_size,
219	.addr = nv50_instobj_addr,
220	.boot = nv50_instobj_boot,
221	.acquire = nv50_instobj_acquire,
222	.release = nv50_instobj_release,
223	.rd32 = nv50_instobj_rd32,
224	.wr32 = nv50_instobj_wr32,
225	.map = nv50_instobj_map,
226};
227
228static int
229nv50_instobj_new(struct nvkm_instmem *base, u32 size, u32 align, bool zero,
230		 struct nvkm_memory **pmemory)
231{
232	struct nv50_instmem *imem = nv50_instmem(base);
233	struct nv50_instobj *iobj;
234	struct nvkm_ram *ram = imem->base.subdev.device->fb->ram;
235	int ret;
236
237	if (!(iobj = kzalloc(sizeof(*iobj), GFP_KERNEL)))
238		return -ENOMEM;
239	*pmemory = &iobj->memory;
240
241	nvkm_memory_ctor(&nv50_instobj_func, &iobj->memory);
242	iobj->imem = imem;
243
244	size  = max((size  + 4095) & ~4095, (u32)4096);
245	align = max((align + 4095) & ~4095, (u32)4096);
246
247	ret = ram->func->get(ram, size, align, 0, 0x800, &iobj->mem);
248	if (ret)
249		return ret;
250
251	iobj->mem->page_shift = 12;
252	return 0;
253}
254
255/******************************************************************************
256 * instmem subdev implementation
257 *****************************************************************************/
258
259static void
260nv50_instmem_fini(struct nvkm_instmem *base)
261{
262	nv50_instmem(base)->addr = ~0ULL;
263}
264
265static const struct nvkm_instmem_func
266nv50_instmem = {
267	.fini = nv50_instmem_fini,
268	.memory_new = nv50_instobj_new,
269	.persistent = false,
270	.zero = false,
271};
272
273int
274nv50_instmem_new(struct nvkm_device *device, int index,
275		 struct nvkm_instmem **pimem)
276{
277	struct nv50_instmem *imem;
278
279	if (!(imem = kzalloc(sizeof(*imem), GFP_KERNEL)))
280		return -ENOMEM;
281	nvkm_instmem_ctor(&nv50_instmem, device, index, &imem->base);
282	spin_lock_init(&imem->lock);
283	*pimem = &imem->base;
284	return 0;
285}
286