kernel/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gf100.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 #include "gf100.h"
  25 #include "ram.h"
  26
  27 extern const u8 gf100_pte_storage_type_map[256];
  28
  29 bool
  30 gf100_fb_memtype_valid(struct nvkm_fb *fb, u32 tile_flags)
  31 {
  32         u8 memtype = (tile_flags & 0x0000ff00) >> 8;
  33         return likely((gf100_pte_storage_type_map[memtype] != 0xff));
  34 }
  35
  36 void
  37 gf100_fb_intr(struct nvkm_fb *base)
  38 {
  39         struct gf100_fb *fb = gf100_fb(base);
  40         struct nvkm_subdev *subdev = &fb->base.subdev;
  41         struct nvkm_device *device = subdev->device;
  42         u32 intr = nvkm_rd32(device, 0x000100);
  43         if (intr & 0x08000000)
  44                 nvkm_debug(subdev, "PFFB intr\n");
  45         if (intr & 0x00002000)
  46                 nvkm_debug(subdev, "PBFB intr\n");
  47 }
  48
  49 void
  50 gf100_fb_init(struct nvkm_fb *base)
  51 {
  52         struct gf100_fb *fb = gf100_fb(base);
  53         struct nvkm_device *device = fb->base.subdev.device;
  54
  55         if (fb->r100c10_page)
  56                 nvkm_wr32(device, 0x100c10, fb->r100c10 >> 8);
  57
  58         nvkm_mask(device, 0x100c80, 0x00000001, 0x00000000); /* 128KiB lpg */
  59 }
  60
  61 void *
  62 gf100_fb_dtor(struct nvkm_fb *base)
  63 {
  64         struct gf100_fb *fb = gf100_fb(base);
  65         struct nvkm_device *device = fb->base.subdev.device;
  66
  67         if (fb->r100c10_page) {
  68                 dma_unmap_page(device->dev, fb->r100c10, PAGE_SIZE,
  69                                DMA_BIDIRECTIONAL);
  70                 __free_page(fb->r100c10_page);
  71         }
  72
  73         return fb;
  74 }
  75
  76 int
  77 gf100_fb_new_(const struct nvkm_fb_func *func, struct nvkm_device *device,
  78               int index, struct nvkm_fb **pfb)
  79 {
  80         struct gf100_fb *fb;
  81
  82         if (!(fb = kzalloc(sizeof(*fb), GFP_KERNEL)))
  83                 return -ENOMEM;
  84         nvkm_fb_ctor(func, device, index, &fb->base);
  85         *pfb = &fb->base;
  86
  87         fb->r100c10_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
  88         if (fb->r100c10_page) {
  89                 fb->r100c10 = dma_map_page(device->dev, fb->r100c10_page, 0,
  90                                            PAGE_SIZE, DMA_BIDIRECTIONAL);
  91                 if (dma_mapping_error(device->dev, fb->r100c10))
  92                         return -EFAULT;
  93         }
  94
  95         return 0;
  96 }
  97
  98 static const struct nvkm_fb_func
  99 gf100_fb = {
 100         .dtor = gf100_fb_dtor,
 101         .init = gf100_fb_init,
 102         .intr = gf100_fb_intr,
 103         .ram_new = gf100_ram_new,
 104         .memtype_valid = gf100_fb_memtype_valid,
 105 };
 106
 107 int
 108 gf100_fb_new(struct nvkm_device *device, int index, struct nvkm_fb **pfb)
 109 {
 110         return gf100_fb_new_(&gf100_fb, device, index, pfb);
 111 }