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