kernel/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
  48 static inline struct io_mapping *
  49 fbmem_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
  55 static inline void
  56 fbmem_fini(struct io_mapping *fb)
  57 {
  58         io_mapping_free(fb);
  59 }
  60
  61 static inline u32
  62 fbmem_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
  70 static inline void
  71 fbmem_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
  79 static inline bool
  80 fbmem_readback(struct io_mapping *fb, u32 off, u32 val)
  81 {
  82         fbmem_poke(fb, off, val);
  83         return val == fbmem_peek(fb, off);
  84 }