kernel/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c

   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
  32 struct 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
  44 struct 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
  52 static enum nvkm_memory_target
  53 nv50_instobj_target(struct nvkm_memory *memory)
  54 {
  55         return NVKM_MEM_TARGET_VRAM;
  56 }
  57
  58 static u64
  59 nv50_instobj_addr(struct nvkm_memory *memory)
  60 {
  61         return nv50_instobj(memory)->mem->offset;
  62 }
  63
  64 static u64
  65 nv50_instobj_size(struct nvkm_memory *memory)
  66 {
  67         return (u64)nv50_instobj(memory)->mem->size << NVKM_RAM_MM_SHIFT;
  68 }
  69
  70 static void
  71 nv50_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
  98 static void
  99 nv50_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
 105 static void __iomem *
 106 nv50_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
 124 static u32
 125 nv50_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
 142 static void
 143 nv50_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
 158 static void
 159 nv50_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
 165 static void *
 166 nv50_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
 178 static const struct nvkm_memory_func
 179 nv50_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
 192 static int
 193 nv50_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
 223 static void
 224 nv50_instmem_fini(struct nvkm_instmem *base)
 225 {
 226         nv50_instmem(base)->addr = ~0ULL;
 227 }
 228
 229 static const struct nvkm_instmem_func
 230 nv50_instmem = {
 231         .fini = nv50_instmem_fini,
 232         .memory_new = nv50_instobj_new,
 233         .persistent = false,
 234         .zero = false,
 235 };
 236
 237 int
 238 nv50_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 }