LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/devinit/fbmem.h

   1/*
   2 * Copyright (C) 2010 Francisco Jerez.
   3 * All Rights Reserved.
   4 *
   5 * Permission is hereby granted, free of charge, to any person obtaining
   6 * a copy of this software and associated documentation files (the
   7 * "Software"), to deal in the Software without restriction, including
   8 * without limitation the rights to use, copy, modify, merge, publish,
   9 * distribute, sublicense, and/or sell copies of the Software, and to
  10 * permit persons to whom the Software is furnished to do so, subject to
  11 * the following conditions:
  12 *
  13 * The above copyright notice and this permission notice (including the
  14 * next paragraph) shall be included in all copies or substantial
  15 * portions of the Software.
  16 *
  17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24 *
  25 */
  26#include <core/device.h>
  27#include <subdev/fb/regsnv04.h>
  28
  29#define NV04_PFB_DEBUG_0                                        0x00100080
  30#       define NV04_PFB_DEBUG_0_PAGE_MODE                       0x00000001
  31#       define NV04_PFB_DEBUG_0_REFRESH_OFF                     0x00000010
  32#       define NV04_PFB_DEBUG_0_REFRESH_COUNTX64                0x00003f00
  33#       define NV04_PFB_DEBUG_0_REFRESH_SLOW_CLK                0x00004000
  34#       define NV04_PFB_DEBUG_0_SAFE_MODE                       0x00008000
  35#       define NV04_PFB_DEBUG_0_ALOM_ENABLE                     0x00010000
  36#       define NV04_PFB_DEBUG_0_CASOE                           0x00100000
  37#       define NV04_PFB_DEBUG_0_CKE_INVERT                      0x10000000
  38#       define NV04_PFB_DEBUG_0_REFINC                          0x20000000
  39#       define NV04_PFB_DEBUG_0_SAVE_POWER_OFF                  0x40000000
  40#define NV04_PFB_CFG0                                           0x00100200
  41#       define NV04_PFB_CFG0_SCRAMBLE                           0x20000000
  42#define NV04_PFB_CFG1                                           0x00100204
  43#define NV04_PFB_SCRAMBLE(i)                         (0x00100400 + 4 * (i))
  44
  45#define NV10_PFB_REFCTRL                                        0x00100210
  46#       define NV10_PFB_REFCTRL_VALID_1                         (1 << 31)
  47
  48static inline struct io_mapping *
  49fbmem_init(struct nvkm_device *dev)
  50{
  51        return io_mapping_create_wc(nv_device_resource_start(dev, 1),
  52                                    nv_device_resource_len(dev, 1));
  53}
  54
  55static inline void
  56fbmem_fini(struct io_mapping *fb)
  57{
  58        io_mapping_free(fb);
  59}
  60
  61static inline u32
  62fbmem_peek(struct io_mapping *fb, u32 off)
  63{
  64        u8 __iomem *p = io_mapping_map_atomic_wc(fb, off & PAGE_MASK);
  65        u32 val = ioread32(p + (off & ~PAGE_MASK));
  66        io_mapping_unmap_atomic(p);
  67        return val;
  68}
  69
  70static inline void
  71fbmem_poke(struct io_mapping *fb, u32 off, u32 val)
  72{
  73        u8 __iomem *p = io_mapping_map_atomic_wc(fb, off & PAGE_MASK);
  74        iowrite32(val, p + (off & ~PAGE_MASK));
  75        wmb();
  76        io_mapping_unmap_atomic(p);
  77}
  78
  79static inline bool
  80fbmem_readback(struct io_mapping *fb, u32 off, u32 val)
  81{
  82        fbmem_poke(fb, off, val);
  83        return val == fbmem_peek(fb, off);
  84}
  85