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 #include "priv.h"
  25
  26 #include <subdev/fb.h>
  27
  28 struct nv50_instmem_priv {
  29         struct nvkm_instmem base;
  30         spinlock_t lock;
  31         u64 addr;
  32 };
  33
  34 struct nv50_instobj_priv {
  35         struct nvkm_instobj base;
  36         struct nvkm_mem *mem;
  37 };
  38
  39 /******************************************************************************
  40  * instmem object implementation
  41  *****************************************************************************/
  42
  43 static u32
  44 nv50_instobj_rd32(struct nvkm_object *object, u64 offset)
  45 {
  46         struct nv50_instmem_priv *priv = (void *)nvkm_instmem(object);
  47         struct nv50_instobj_priv *node = (void *)object;
  48         unsigned long flags;
  49         u64 base = (node->mem->offset + offset) & 0xffffff00000ULL;
  50         u64 addr = (node->mem->offset + offset) & 0x000000fffffULL;
  51         u32 data;
  52
  53         spin_lock_irqsave(&priv->lock, flags);
  54         if (unlikely(priv->addr != base)) {
  55                 nv_wr32(priv, 0x001700, base >> 16);
  56                 priv->addr = base;
  57         }
  58         data = nv_rd32(priv, 0x700000 + addr);
  59         spin_unlock_irqrestore(&priv->lock, flags);
  60         return data;
  61 }
  62
  63 static void
  64 nv50_instobj_wr32(struct nvkm_object *object, u64 offset, u32 data)
  65 {
  66         struct nv50_instmem_priv *priv = (void *)nvkm_instmem(object);
  67         struct nv50_instobj_priv *node = (void *)object;
  68         unsigned long flags;
  69         u64 base = (node->mem->offset + offset) & 0xffffff00000ULL;
  70         u64 addr = (node->mem->offset + offset) & 0x000000fffffULL;
  71
  72         spin_lock_irqsave(&priv->lock, flags);
  73         if (unlikely(priv->addr != base)) {
  74                 nv_wr32(priv, 0x001700, base >> 16);
  75                 priv->addr = base;
  76         }
  77         nv_wr32(priv, 0x700000 + addr, data);
  78         spin_unlock_irqrestore(&priv->lock, flags);
  79 }
  80
  81 static void
  82 nv50_instobj_dtor(struct nvkm_object *object)
  83 {
  84         struct nv50_instobj_priv *node = (void *)object;
  85         struct nvkm_fb *pfb = nvkm_fb(object);
  86         pfb->ram->put(pfb, &node->mem);
  87         nvkm_instobj_destroy(&node->base);
  88 }
  89
  90 static int
  91 nv50_instobj_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
  92                   struct nvkm_oclass *oclass, void *data, u32 size,
  93                   struct nvkm_object **pobject)
  94 {
  95         struct nvkm_fb *pfb = nvkm_fb(parent);
  96         struct nvkm_instobj_args *args = data;
  97         struct nv50_instobj_priv *node;
  98         int ret;
  99
 100         args->size  = max((args->size  + 4095) & ~4095, (u32)4096);
 101         args->align = max((args->align + 4095) & ~4095, (u32)4096);
 102
 103         ret = nvkm_instobj_create(parent, engine, oclass, &node);
 104         *pobject = nv_object(node);
 105         if (ret)
 106                 return ret;
 107
 108         ret = pfb->ram->get(pfb, args->size, args->align, 0, 0x800, &node->mem);
 109         if (ret)
 110                 return ret;
 111
 112         node->base.addr = node->mem->offset;
 113         node->base.size = node->mem->size << 12;
 114         node->mem->page_shift = 12;
 115         return 0;
 116 }
 117
 118 static struct nvkm_instobj_impl
 119 nv50_instobj_oclass = {
 120         .base.ofuncs = &(struct nvkm_ofuncs) {
 121                 .ctor = nv50_instobj_ctor,
 122                 .dtor = nv50_instobj_dtor,
 123                 .init = _nvkm_instobj_init,
 124                 .fini = _nvkm_instobj_fini,
 125                 .rd32 = nv50_instobj_rd32,
 126                 .wr32 = nv50_instobj_wr32,
 127         },
 128 };
 129
 130 /******************************************************************************
 131  * instmem subdev implementation
 132  *****************************************************************************/
 133
 134 static int
 135 nv50_instmem_fini(struct nvkm_object *object, bool suspend)
 136 {
 137         struct nv50_instmem_priv *priv = (void *)object;
 138         priv->addr = ~0ULL;
 139         return nvkm_instmem_fini(&priv->base, suspend);
 140 }
 141
 142 static int
 143 nv50_instmem_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 144                   struct nvkm_oclass *oclass, void *data, u32 size,
 145                   struct nvkm_object **pobject)
 146 {
 147         struct nv50_instmem_priv *priv;
 148         int ret;
 149
 150         ret = nvkm_instmem_create(parent, engine, oclass, &priv);
 151         *pobject = nv_object(priv);
 152         if (ret)
 153                 return ret;
 154
 155         spin_lock_init(&priv->lock);
 156         return 0;
 157 }
 158
 159 struct nvkm_oclass *
 160 nv50_instmem_oclass = &(struct nvkm_instmem_impl) {
 161         .base.handle = NV_SUBDEV(INSTMEM, 0x50),
 162         .base.ofuncs = &(struct nvkm_ofuncs) {
 163                 .ctor = nv50_instmem_ctor,
 164                 .dtor = _nvkm_instmem_dtor,
 165                 .init = _nvkm_instmem_init,
 166                 .fini = nv50_instmem_fini,
 167         },
 168         .instobj = &nv50_instobj_oclass.base,
 169 }.base;