1 /*
2  * Copyright 2015 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 <bskeggs@redhat.com>
23  */
24 #define nvkm_vram(p) container_of((p), struct nvkm_vram, memory)
25 #include "ram.h"
26 
27 #include <core/memory.h>
28 #include <subdev/mmu.h>
29 
30 struct nvkm_vram {
31 	struct nvkm_memory memory;
32 	struct nvkm_ram *ram;
33 	u8 page;
34 	struct nvkm_mm_node *mn;
35 };
36 
37 static int
38 nvkm_vram_map(struct nvkm_memory *memory, u64 offset, struct nvkm_vmm *vmm,
39 	      struct nvkm_vma *vma, void *argv, u32 argc)
40 {
41 	struct nvkm_vram *vram = nvkm_vram(memory);
42 	struct nvkm_vmm_map map = {
43 		.memory = &vram->memory,
44 		.offset = offset,
45 		.mem = vram->mn,
46 	};
47 
48 	return nvkm_vmm_map(vmm, vma, argv, argc, &map);
49 }
50 
51 static u64
52 nvkm_vram_size(struct nvkm_memory *memory)
53 {
54 	return (u64)nvkm_mm_size(nvkm_vram(memory)->mn) << NVKM_RAM_MM_SHIFT;
55 }
56 
57 static u64
58 nvkm_vram_addr(struct nvkm_memory *memory)
59 {
60 	struct nvkm_vram *vram = nvkm_vram(memory);
61 	if (!nvkm_mm_contiguous(vram->mn))
62 		return ~0ULL;
63 	return (u64)nvkm_mm_addr(vram->mn) << NVKM_RAM_MM_SHIFT;
64 }
65 
66 static u8
67 nvkm_vram_page(struct nvkm_memory *memory)
68 {
69 	return nvkm_vram(memory)->page;
70 }
71 
72 static enum nvkm_memory_target
73 nvkm_vram_target(struct nvkm_memory *memory)
74 {
75 	return NVKM_MEM_TARGET_VRAM;
76 }
77 
78 static void *
79 nvkm_vram_dtor(struct nvkm_memory *memory)
80 {
81 	struct nvkm_vram *vram = nvkm_vram(memory);
82 	struct nvkm_mm_node *next = vram->mn;
83 	struct nvkm_mm_node *node;
84 	mutex_lock(&vram->ram->fb->subdev.mutex);
85 	while ((node = next)) {
86 		next = node->next;
87 		nvkm_mm_free(&vram->ram->vram, &node);
88 	}
89 	mutex_unlock(&vram->ram->fb->subdev.mutex);
90 	return vram;
91 }
92 
93 static const struct nvkm_memory_func
94 nvkm_vram = {
95 	.dtor = nvkm_vram_dtor,
96 	.target = nvkm_vram_target,
97 	.page = nvkm_vram_page,
98 	.addr = nvkm_vram_addr,
99 	.size = nvkm_vram_size,
100 	.map = nvkm_vram_map,
101 };
102 
103 int
104 nvkm_ram_get(struct nvkm_device *device, u8 heap, u8 type, u8 rpage, u64 size,
105 	     bool contig, bool back, struct nvkm_memory **pmemory)
106 {
107 	struct nvkm_ram *ram;
108 	struct nvkm_mm *mm;
109 	struct nvkm_mm_node **node, *r;
110 	struct nvkm_vram *vram;
111 	u8   page = max(rpage, (u8)NVKM_RAM_MM_SHIFT);
112 	u32 align = (1 << page) >> NVKM_RAM_MM_SHIFT;
113 	u32   max = ALIGN(size, 1 << page) >> NVKM_RAM_MM_SHIFT;
114 	u32   min = contig ? max : align;
115 	int ret;
116 
117 	if (!device->fb || !(ram = device->fb->ram))
118 		return -ENODEV;
119 	ram = device->fb->ram;
120 	mm = &ram->vram;
121 
122 	if (!(vram = kzalloc(sizeof(*vram), GFP_KERNEL)))
123 		return -ENOMEM;
124 	nvkm_memory_ctor(&nvkm_vram, &vram->memory);
125 	vram->ram = ram;
126 	vram->page = page;
127 	*pmemory = &vram->memory;
128 
129 	mutex_lock(&ram->fb->subdev.mutex);
130 	node = &vram->mn;
131 	do {
132 		if (back)
133 			ret = nvkm_mm_tail(mm, heap, type, max, min, align, &r);
134 		else
135 			ret = nvkm_mm_head(mm, heap, type, max, min, align, &r);
136 		if (ret) {
137 			mutex_unlock(&ram->fb->subdev.mutex);
138 			nvkm_memory_unref(pmemory);
139 			return ret;
140 		}
141 
142 		*node = r;
143 		node = &r->next;
144 		max -= r->length;
145 	} while (max);
146 	mutex_unlock(&ram->fb->subdev.mutex);
147 	return 0;
148 }
149 
150 int
151 nvkm_ram_init(struct nvkm_ram *ram)
152 {
153 	if (ram->func->init)
154 		return ram->func->init(ram);
155 	return 0;
156 }
157 
158 void
159 nvkm_ram_del(struct nvkm_ram **pram)
160 {
161 	struct nvkm_ram *ram = *pram;
162 	if (ram && !WARN_ON(!ram->func)) {
163 		if (ram->func->dtor)
164 			*pram = ram->func->dtor(ram);
165 		nvkm_mm_fini(&ram->vram);
166 		kfree(*pram);
167 		*pram = NULL;
168 	}
169 }
170 
171 int
172 nvkm_ram_ctor(const struct nvkm_ram_func *func, struct nvkm_fb *fb,
173 	      enum nvkm_ram_type type, u64 size, struct nvkm_ram *ram)
174 {
175 	static const char *name[] = {
176 		[NVKM_RAM_TYPE_UNKNOWN] = "of unknown memory type",
177 		[NVKM_RAM_TYPE_STOLEN ] = "stolen system memory",
178 		[NVKM_RAM_TYPE_SGRAM  ] = "SGRAM",
179 		[NVKM_RAM_TYPE_SDRAM  ] = "SDRAM",
180 		[NVKM_RAM_TYPE_DDR1   ] = "DDR1",
181 		[NVKM_RAM_TYPE_DDR2   ] = "DDR2",
182 		[NVKM_RAM_TYPE_DDR3   ] = "DDR3",
183 		[NVKM_RAM_TYPE_GDDR2  ] = "GDDR2",
184 		[NVKM_RAM_TYPE_GDDR3  ] = "GDDR3",
185 		[NVKM_RAM_TYPE_GDDR4  ] = "GDDR4",
186 		[NVKM_RAM_TYPE_GDDR5  ] = "GDDR5",
187 	};
188 	struct nvkm_subdev *subdev = &fb->subdev;
189 	int ret;
190 
191 	nvkm_info(subdev, "%d MiB %s\n", (int)(size >> 20), name[type]);
192 	ram->func = func;
193 	ram->fb = fb;
194 	ram->type = type;
195 	ram->size = size;
196 
197 	if (!nvkm_mm_initialised(&ram->vram)) {
198 		ret = nvkm_mm_init(&ram->vram, NVKM_RAM_MM_NORMAL, 0,
199 				   size >> NVKM_RAM_MM_SHIFT, 1);
200 		if (ret)
201 			return ret;
202 	}
203 
204 	return 0;
205 }
206 
207 int
208 nvkm_ram_new_(const struct nvkm_ram_func *func, struct nvkm_fb *fb,
209 	      enum nvkm_ram_type type, u64 size, struct nvkm_ram **pram)
210 {
211 	if (!(*pram = kzalloc(sizeof(**pram), GFP_KERNEL)))
212 		return -ENOMEM;
213 	return nvkm_ram_ctor(func, fb, type, size, *pram);
214 }
215