drivers/gpu/drm/nouveau/nvkm/subdev/fb/rammcp77.c

   1 /*
   2  * Copyright 2013 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 mcp77_ram(p) container_of((p), struct mcp77_ram, base)
  25 #include "ram.h"
  26
  27 struct mcp77_ram {
  28         struct nvkm_ram base;
  29         u64 poller_base;
  30 };
  31
  32 static int
  33 mcp77_ram_init(struct nvkm_ram *base)
  34 {
  35         struct mcp77_ram *ram = mcp77_ram(base);
  36         struct nvkm_device *device = ram->base.fb->subdev.device;
  37         u32 dniso  = ((ram->base.size - (ram->poller_base + 0x00)) >> 5) - 1;
  38         u32 hostnb = ((ram->base.size - (ram->poller_base + 0x20)) >> 5) - 1;
  39         u32 flush  = ((ram->base.size - (ram->poller_base + 0x40)) >> 5) - 1;
  40
  41         /* Enable NISO poller for various clients and set their associated
  42          * read address, only for MCP77/78 and MCP79/7A. (fd#25701)
  43          */
  44         nvkm_wr32(device, 0x100c18, dniso);
  45         nvkm_mask(device, 0x100c14, 0x00000000, 0x00000001);
  46         nvkm_wr32(device, 0x100c1c, hostnb);
  47         nvkm_mask(device, 0x100c14, 0x00000000, 0x00000002);
  48         nvkm_wr32(device, 0x100c24, flush);
  49         nvkm_mask(device, 0x100c14, 0x00000000, 0x00010000);
  50         return 0;
  51 }
  52
  53 static const struct nvkm_ram_func
  54 mcp77_ram_func = {
  55         .init = mcp77_ram_init,
  56         .get = nv50_ram_get,
  57         .put = nv50_ram_put,
  58 };
  59
  60 int
  61 mcp77_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
  62 {
  63         struct nvkm_device *device = fb->subdev.device;
  64         u32 rsvd_head = ( 256 * 1024); /* vga memory */
  65         u32 rsvd_tail = (1024 * 1024) + 0x1000; /* vbios etc + poller mem */
  66         u64 base = (u64)nvkm_rd32(device, 0x100e10) << 12;
  67         u64 size = (u64)nvkm_rd32(device, 0x100e14) << 12;
  68         struct mcp77_ram *ram;
  69         int ret;
  70
  71         if (!(ram = kzalloc(sizeof(*ram), GFP_KERNEL)))
  72                 return -ENOMEM;
  73         *pram = &ram->base;
  74
  75         ret = nvkm_ram_ctor(&mcp77_ram_func, fb, NVKM_RAM_TYPE_STOLEN,
  76                             size, 0, &ram->base);
  77         if (ret)
  78                 return ret;
  79
  80         ram->poller_base = size - rsvd_tail;
  81         ram->base.stolen = base;
  82         nvkm_mm_fini(&ram->base.vram);
  83
  84         return nvkm_mm_init(&ram->base.vram, rsvd_head >> NVKM_RAM_MM_SHIFT,
  85                             (size - rsvd_head - rsvd_tail) >>
  86                             NVKM_RAM_MM_SHIFT, 1);
  87 }