1/*
2 * Copyright 2012 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Ben Skeggs
23 */
24#define nv50_instmem(p) container_of((p), struct nv50_instmem, base)
25#include "priv.h"
26
27#include <core/memory.h>
28#include <subdev/bar.h>
29#include <subdev/fb.h>
30#include <subdev/mmu.h>
31
32struct nv50_instmem {
33	struct nvkm_instmem base;
34	unsigned long lock_flags;
35	spinlock_t lock;
36	u64 addr;
37};
38
39/******************************************************************************
40 * instmem object implementation
41 *****************************************************************************/
42#define nv50_instobj(p) container_of((p), struct nv50_instobj, memory)
43
44struct nv50_instobj {
45	struct nvkm_memory memory;
46	struct nv50_instmem *imem;
47	struct nvkm_mem *mem;
48	struct nvkm_vma bar;
49	void *map;
50};
51
52static enum nvkm_memory_target
53nv50_instobj_target(struct nvkm_memory *memory)
54{
55	return NVKM_MEM_TARGET_VRAM;
56}
57
58static u64
59nv50_instobj_addr(struct nvkm_memory *memory)
60{
61	return nv50_instobj(memory)->mem->offset;
62}
63
64static u64
65nv50_instobj_size(struct nvkm_memory *memory)
66{
67	return (u64)nv50_instobj(memory)->mem->size << NVKM_RAM_MM_SHIFT;
68}
69
70static void
71nv50_instobj_boot(struct nvkm_memory *memory, struct nvkm_vm *vm)
72{
73	struct nv50_instobj *iobj = nv50_instobj(memory);
74	struct nvkm_subdev *subdev = &iobj->imem->base.subdev;
75	struct nvkm_device *device = subdev->device;
76	u64 size = nvkm_memory_size(memory);
77	void __iomem *map;
78	int ret;
79
80	iobj->map = ERR_PTR(-ENOMEM);
81
82	ret = nvkm_vm_get(vm, size, 12, NV_MEM_ACCESS_RW, &iobj->bar);
83	if (ret == 0) {
84		map = ioremap(device->func->resource_addr(device, 3) +
85			      (u32)iobj->bar.offset, size);
86		if (map) {
87			nvkm_memory_map(memory, &iobj->bar, 0);
88			iobj->map = map;
89		} else {
90			nvkm_warn(subdev, "PRAMIN ioremap failed\n");
91			nvkm_vm_put(&iobj->bar);
92		}
93	} else {
94		nvkm_warn(subdev, "PRAMIN exhausted\n");
95	}
96}
97
98static void
99nv50_instobj_release(struct nvkm_memory *memory)
100{
101	struct nv50_instmem *imem = nv50_instobj(memory)->imem;
102	spin_unlock_irqrestore(&imem->lock, imem->lock_flags);
103}
104
105static void __iomem *
106nv50_instobj_acquire(struct nvkm_memory *memory)
107{
108	struct nv50_instobj *iobj = nv50_instobj(memory);
109	struct nv50_instmem *imem = iobj->imem;
110	struct nvkm_bar *bar = imem->base.subdev.device->bar;
111	struct nvkm_vm *vm;
112	unsigned long flags;
113
114	if (!iobj->map && (vm = nvkm_bar_kmap(bar)))
115		nvkm_memory_boot(memory, vm);
116	if (!IS_ERR_OR_NULL(iobj->map))
117		return iobj->map;
118
119	spin_lock_irqsave(&imem->lock, flags);
120	imem->lock_flags = flags;
121	return NULL;
122}
123
124static u32
125nv50_instobj_rd32(struct nvkm_memory *memory, u64 offset)
126{
127	struct nv50_instobj *iobj = nv50_instobj(memory);
128	struct nv50_instmem *imem = iobj->imem;
129	struct nvkm_device *device = imem->base.subdev.device;
130	u64 base = (iobj->mem->offset + offset) & 0xffffff00000ULL;
131	u64 addr = (iobj->mem->offset + offset) & 0x000000fffffULL;
132	u32 data;
133
134	if (unlikely(imem->addr != base)) {
135		nvkm_wr32(device, 0x001700, base >> 16);
136		imem->addr = base;
137	}
138	data = nvkm_rd32(device, 0x700000 + addr);
139	return data;
140}
141
142static void
143nv50_instobj_wr32(struct nvkm_memory *memory, u64 offset, u32 data)
144{
145	struct nv50_instobj *iobj = nv50_instobj(memory);
146	struct nv50_instmem *imem = iobj->imem;
147	struct nvkm_device *device = imem->base.subdev.device;
148	u64 base = (iobj->mem->offset + offset) & 0xffffff00000ULL;
149	u64 addr = (iobj->mem->offset + offset) & 0x000000fffffULL;
150
151	if (unlikely(imem->addr != base)) {
152		nvkm_wr32(device, 0x001700, base >> 16);
153		imem->addr = base;
154	}
155	nvkm_wr32(device, 0x700000 + addr, data);
156}
157
158static void
159nv50_instobj_map(struct nvkm_memory *memory, struct nvkm_vma *vma, u64 offset)
160{
161	struct nv50_instobj *iobj = nv50_instobj(memory);
162	nvkm_vm_map_at(vma, offset, iobj->mem);
163}
164
165static void *
166nv50_instobj_dtor(struct nvkm_memory *memory)
167{
168	struct nv50_instobj *iobj = nv50_instobj(memory);
169	struct nvkm_ram *ram = iobj->imem->base.subdev.device->fb->ram;
170	if (!IS_ERR_OR_NULL(iobj->map)) {
171		nvkm_vm_put(&iobj->bar);
172		iounmap(iobj->map);
173	}
174	ram->func->put(ram, &iobj->mem);
175	return iobj;
176}
177
178static const struct nvkm_memory_func
179nv50_instobj_func = {
180	.dtor = nv50_instobj_dtor,
181	.target = nv50_instobj_target,
182	.size = nv50_instobj_size,
183	.addr = nv50_instobj_addr,
184	.boot = nv50_instobj_boot,
185	.acquire = nv50_instobj_acquire,
186	.release = nv50_instobj_release,
187	.rd32 = nv50_instobj_rd32,
188	.wr32 = nv50_instobj_wr32,
189	.map = nv50_instobj_map,
190};
191
192static int
193nv50_instobj_new(struct nvkm_instmem *base, u32 size, u32 align, bool zero,
194		 struct nvkm_memory **pmemory)
195{
196	struct nv50_instmem *imem = nv50_instmem(base);
197	struct nv50_instobj *iobj;
198	struct nvkm_ram *ram = imem->base.subdev.device->fb->ram;
199	int ret;
200
201	if (!(iobj = kzalloc(sizeof(*iobj), GFP_KERNEL)))
202		return -ENOMEM;
203	*pmemory = &iobj->memory;
204
205	nvkm_memory_ctor(&nv50_instobj_func, &iobj->memory);
206	iobj->imem = imem;
207
208	size  = max((size  + 4095) & ~4095, (u32)4096);
209	align = max((align + 4095) & ~4095, (u32)4096);
210
211	ret = ram->func->get(ram, size, align, 0, 0x800, &iobj->mem);
212	if (ret)
213		return ret;
214
215	iobj->mem->page_shift = 12;
216	return 0;
217}
218
219/******************************************************************************
220 * instmem subdev implementation
221 *****************************************************************************/
222
223static void
224nv50_instmem_fini(struct nvkm_instmem *base)
225{
226	nv50_instmem(base)->addr = ~0ULL;
227}
228
229static const struct nvkm_instmem_func
230nv50_instmem = {
231	.fini = nv50_instmem_fini,
232	.memory_new = nv50_instobj_new,
233	.persistent = false,
234	.zero = false,
235};
236
237int
238nv50_instmem_new(struct nvkm_device *device, int index,
239		 struct nvkm_instmem **pimem)
240{
241	struct nv50_instmem *imem;
242
243	if (!(imem = kzalloc(sizeof(*imem), GFP_KERNEL)))
244		return -ENOMEM;
245	nvkm_instmem_ctor(&nv50_instmem, device, index, &imem->base);
246	spin_lock_init(&imem->lock);
247	*pimem = &imem->base;
248	return 0;
249}
250