linux/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ram.c
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   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
  30struct nvkm_vram {
  31        struct nvkm_memory memory;
  32        struct nvkm_ram *ram;
  33        u8 page;
  34        struct nvkm_mm_node *mn;
  35};
  36
  37static int
  38nvkm_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
  51static u64
  52nvkm_vram_size(struct nvkm_memory *memory)
  53{
  54        return (u64)nvkm_mm_size(nvkm_vram(memory)->mn) << NVKM_RAM_MM_SHIFT;
  55}
  56
  57static u64
  58nvkm_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
  66static u8
  67nvkm_vram_page(struct nvkm_memory *memory)
  68{
  69        return nvkm_vram(memory)->page;
  70}
  71
  72static enum nvkm_memory_target
  73nvkm_vram_target(struct nvkm_memory *memory)
  74{
  75        return NVKM_MEM_TARGET_VRAM;
  76}
  77
  78static void *
  79nvkm_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
  93static const struct nvkm_memory_func
  94nvkm_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
 103int
 104nvkm_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
 150int
 151nvkm_ram_init(struct nvkm_ram *ram)
 152{
 153        if (ram->func->init)
 154                return ram->func->init(ram);
 155        return 0;
 156}
 157
 158void
 159nvkm_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
 171int
 172nvkm_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                [NVKM_RAM_TYPE_GDDR5X ] = "GDDR5X",
 188                [NVKM_RAM_TYPE_GDDR6  ] = "GDDR6",
 189                [NVKM_RAM_TYPE_HBM2   ] = "HBM2",
 190        };
 191        struct nvkm_subdev *subdev = &fb->subdev;
 192        int ret;
 193
 194        nvkm_info(subdev, "%d MiB %s\n", (int)(size >> 20), name[type]);
 195        ram->func = func;
 196        ram->fb = fb;
 197        ram->type = type;
 198        ram->size = size;
 199
 200        if (!nvkm_mm_initialised(&ram->vram)) {
 201                ret = nvkm_mm_init(&ram->vram, NVKM_RAM_MM_NORMAL, 0,
 202                                   size >> NVKM_RAM_MM_SHIFT, 1);
 203                if (ret)
 204                        return ret;
 205        }
 206
 207        return 0;
 208}
 209
 210int
 211nvkm_ram_new_(const struct nvkm_ram_func *func, struct nvkm_fb *fb,
 212              enum nvkm_ram_type type, u64 size, struct nvkm_ram **pram)
 213{
 214        if (!(*pram = kzalloc(sizeof(**pram), GFP_KERNEL)))
 215                return -ENOMEM;
 216        return nvkm_ram_ctor(func, fb, type, size, *pram);
 217}
 218