1 /*
2 * Copyright (C) 2007 Ben Skeggs.
3 *
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sublicense, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial
16 * portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 */
27
28 #include "drmP.h"
29 #include "drm.h"
30 #include "nouveau_drv.h"
31 #include "nouveau_ramht.h"
32
33 int
nouveau_notifier_init_channel(struct nouveau_channel * chan)34 nouveau_notifier_init_channel(struct nouveau_channel *chan)
35 {
36 struct drm_device *dev = chan->dev;
37 struct nouveau_bo *ntfy = NULL;
38 uint32_t flags, ttmpl;
39 int ret;
40
41 if (nouveau_vram_notify) {
42 flags = NOUVEAU_GEM_DOMAIN_VRAM;
43 ttmpl = TTM_PL_FLAG_VRAM;
44 } else {
45 flags = NOUVEAU_GEM_DOMAIN_GART;
46 ttmpl = TTM_PL_FLAG_TT;
47 }
48
49 ret = nouveau_gem_new(dev, NULL, PAGE_SIZE, 0, flags, 0, 0, &ntfy);
50 if (ret)
51 return ret;
52
53 ret = nouveau_bo_pin(ntfy, ttmpl);
54 if (ret)
55 goto out_err;
56
57 ret = nouveau_bo_map(ntfy);
58 if (ret)
59 goto out_err;
60
61 ret = drm_mm_init(&chan->notifier_heap, 0, ntfy->bo.mem.size);
62 if (ret)
63 goto out_err;
64
65 chan->notifier_bo = ntfy;
66 out_err:
67 if (ret)
68 drm_gem_object_unreference_unlocked(ntfy->gem);
69
70 return ret;
71 }
72
73 void
nouveau_notifier_takedown_channel(struct nouveau_channel * chan)74 nouveau_notifier_takedown_channel(struct nouveau_channel *chan)
75 {
76 struct drm_device *dev = chan->dev;
77
78 if (!chan->notifier_bo)
79 return;
80
81 nouveau_bo_unmap(chan->notifier_bo);
82 mutex_lock(&dev->struct_mutex);
83 nouveau_bo_unpin(chan->notifier_bo);
84 mutex_unlock(&dev->struct_mutex);
85 drm_gem_object_unreference_unlocked(chan->notifier_bo->gem);
86 drm_mm_takedown(&chan->notifier_heap);
87 }
88
89 static void
nouveau_notifier_gpuobj_dtor(struct drm_device * dev,struct nouveau_gpuobj * gpuobj)90 nouveau_notifier_gpuobj_dtor(struct drm_device *dev,
91 struct nouveau_gpuobj *gpuobj)
92 {
93 NV_DEBUG(dev, "\n");
94
95 if (gpuobj->priv)
96 drm_mm_put_block(gpuobj->priv);
97 }
98
99 int
nouveau_notifier_alloc(struct nouveau_channel * chan,uint32_t handle,int size,uint32_t start,uint32_t end,uint32_t * b_offset)100 nouveau_notifier_alloc(struct nouveau_channel *chan, uint32_t handle,
101 int size, uint32_t start, uint32_t end,
102 uint32_t *b_offset)
103 {
104 struct drm_device *dev = chan->dev;
105 struct drm_nouveau_private *dev_priv = dev->dev_private;
106 struct nouveau_gpuobj *nobj = NULL;
107 struct drm_mm_node *mem;
108 uint32_t offset;
109 int target, ret;
110
111 mem = drm_mm_search_free_in_range(&chan->notifier_heap, size, 0,
112 start, end, 0);
113 if (mem)
114 mem = drm_mm_get_block_range(mem, size, 0, start, end);
115 if (!mem) {
116 NV_ERROR(dev, "Channel %d notifier block full\n", chan->id);
117 return -ENOMEM;
118 }
119
120 if (dev_priv->card_type < NV_50) {
121 if (chan->notifier_bo->bo.mem.mem_type == TTM_PL_VRAM)
122 target = NV_MEM_TARGET_VRAM;
123 else
124 target = NV_MEM_TARGET_GART;
125 offset = chan->notifier_bo->bo.mem.start << PAGE_SHIFT;
126 } else {
127 target = NV_MEM_TARGET_VM;
128 offset = chan->notifier_bo->vma.offset;
129 }
130 offset += mem->start;
131
132 ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY, offset,
133 mem->size, NV_MEM_ACCESS_RW, target,
134 &nobj);
135 if (ret) {
136 drm_mm_put_block(mem);
137 NV_ERROR(dev, "Error creating notifier ctxdma: %d\n", ret);
138 return ret;
139 }
140 nobj->dtor = nouveau_notifier_gpuobj_dtor;
141 nobj->priv = mem;
142
143 ret = nouveau_ramht_insert(chan, handle, nobj);
144 nouveau_gpuobj_ref(NULL, &nobj);
145 if (ret) {
146 drm_mm_put_block(mem);
147 NV_ERROR(dev, "Error adding notifier to ramht: %d\n", ret);
148 return ret;
149 }
150
151 *b_offset = mem->start;
152 return 0;
153 }
154
155 int
nouveau_notifier_offset(struct nouveau_gpuobj * nobj,uint32_t * poffset)156 nouveau_notifier_offset(struct nouveau_gpuobj *nobj, uint32_t *poffset)
157 {
158 if (!nobj || nobj->dtor != nouveau_notifier_gpuobj_dtor)
159 return -EINVAL;
160
161 if (poffset) {
162 struct drm_mm_node *mem = nobj->priv;
163
164 if (*poffset >= mem->size)
165 return false;
166
167 *poffset += mem->start;
168 }
169
170 return 0;
171 }
172
173 int
nouveau_ioctl_notifier_alloc(struct drm_device * dev,void * data,struct drm_file * file_priv)174 nouveau_ioctl_notifier_alloc(struct drm_device *dev, void *data,
175 struct drm_file *file_priv)
176 {
177 struct drm_nouveau_private *dev_priv = dev->dev_private;
178 struct drm_nouveau_notifierobj_alloc *na = data;
179 struct nouveau_channel *chan;
180 int ret;
181
182 /* completely unnecessary for these chipsets... */
183 if (unlikely(dev_priv->card_type >= NV_C0))
184 return -EINVAL;
185
186 chan = nouveau_channel_get(dev, file_priv, na->channel);
187 if (IS_ERR(chan))
188 return PTR_ERR(chan);
189
190 ret = nouveau_notifier_alloc(chan, na->handle, na->size, 0, 0x1000,
191 &na->offset);
192 nouveau_channel_put(&chan);
193 return ret;
194 }
195