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 "nouveau_drv.h"
25#include "nouveau_dma.h"
26#include "nouveau_fence.h"
27#include "nouveau_vmm.h"
28
29#include "nv50_display.h"
30
31#include <nvif/push206e.h>
32
33#include <nvhw/class/cl826f.h>
34
35static int
36nv84_fence_emit32(struct nouveau_channel *chan, u64 virtual, u32 sequence)
37{
38	struct nvif_push *push = chan->chan.push;
39	int ret = PUSH_WAIT(push, 8);
40	if (ret == 0) {
41		PUSH_MTHD(push, NV826F, SET_CONTEXT_DMA_SEMAPHORE, chan->vram.handle);
42
43		PUSH_MTHD(push, NV826F, SEMAPHOREA,
44			  NVVAL(NV826F, SEMAPHOREA, OFFSET_UPPER, upper_32_bits(virtual)),
45
46					SEMAPHOREB, lower_32_bits(virtual),
47					SEMAPHOREC, sequence,
48
49					SEMAPHORED,
50			  NVDEF(NV826F, SEMAPHORED, OPERATION, RELEASE),
51
52					NON_STALLED_INTERRUPT, 0);
53		PUSH_KICK(push);
54	}
55	return ret;
56}
57
58static int
59nv84_fence_sync32(struct nouveau_channel *chan, u64 virtual, u32 sequence)
60{
61	struct nvif_push *push = chan->chan.push;
62	int ret = PUSH_WAIT(push, 7);
63	if (ret == 0) {
64		PUSH_MTHD(push, NV826F, SET_CONTEXT_DMA_SEMAPHORE, chan->vram.handle);
65
66		PUSH_MTHD(push, NV826F, SEMAPHOREA,
67			  NVVAL(NV826F, SEMAPHOREA, OFFSET_UPPER, upper_32_bits(virtual)),
68
69					SEMAPHOREB, lower_32_bits(virtual),
70					SEMAPHOREC, sequence,
71
72					SEMAPHORED,
73			  NVDEF(NV826F, SEMAPHORED, OPERATION, ACQ_GEQ));
74		PUSH_KICK(push);
75	}
76	return ret;
77}
78
79static inline u32
80nv84_fence_chid(struct nouveau_channel *chan)
81{
82	return chan->drm->runl[chan->runlist].chan_id_base + chan->chid;
83}
84
85static int
86nv84_fence_emit(struct nouveau_fence *fence)
87{
88	struct nouveau_channel *chan = fence->channel;
89	struct nv84_fence_chan *fctx = chan->fence;
90	u64 addr = fctx->vma->addr + nv84_fence_chid(chan) * 16;
91
92	return fctx->base.emit32(chan, addr, fence->base.seqno);
93}
94
95static int
96nv84_fence_sync(struct nouveau_fence *fence,
97		struct nouveau_channel *prev, struct nouveau_channel *chan)
98{
99	struct nv84_fence_chan *fctx = chan->fence;
100	u64 addr = fctx->vma->addr + nv84_fence_chid(prev) * 16;
101
102	return fctx->base.sync32(chan, addr, fence->base.seqno);
103}
104
105static u32
106nv84_fence_read(struct nouveau_channel *chan)
107{
108	struct nv84_fence_priv *priv = chan->drm->fence;
109	return nouveau_bo_rd32(priv->bo, nv84_fence_chid(chan) * 16/4);
110}
111
112static void
113nv84_fence_context_del(struct nouveau_channel *chan)
114{
115	struct nv84_fence_priv *priv = chan->drm->fence;
116	struct nv84_fence_chan *fctx = chan->fence;
117
118	nouveau_bo_wr32(priv->bo, nv84_fence_chid(chan) * 16 / 4, fctx->base.sequence);
119	mutex_lock(&priv->mutex);
120	nouveau_vma_del(&fctx->vma);
121	mutex_unlock(&priv->mutex);
122	nouveau_fence_context_del(&fctx->base);
123	chan->fence = NULL;
124	nouveau_fence_context_free(&fctx->base);
125}
126
127int
128nv84_fence_context_new(struct nouveau_channel *chan)
129{
130	struct nv84_fence_priv *priv = chan->drm->fence;
131	struct nv84_fence_chan *fctx;
132	int ret;
133
134	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
135	if (!fctx)
136		return -ENOMEM;
137
138	nouveau_fence_context_new(chan, &fctx->base);
139	fctx->base.emit = nv84_fence_emit;
140	fctx->base.sync = nv84_fence_sync;
141	fctx->base.read = nv84_fence_read;
142	fctx->base.emit32 = nv84_fence_emit32;
143	fctx->base.sync32 = nv84_fence_sync32;
144	fctx->base.sequence = nv84_fence_read(chan);
145
146	mutex_lock(&priv->mutex);
147	ret = nouveau_vma_new(priv->bo, chan->vmm, &fctx->vma);
148	mutex_unlock(&priv->mutex);
149
150	if (ret)
151		nv84_fence_context_del(chan);
152	return ret;
153}
154
155static bool
156nv84_fence_suspend(struct nouveau_drm *drm)
157{
158	struct nv84_fence_priv *priv = drm->fence;
159	int i;
160
161	priv->suspend = vmalloc(array_size(sizeof(u32), drm->chan_total));
162	if (priv->suspend) {
163		for (i = 0; i < drm->chan_total; i++)
164			priv->suspend[i] = nouveau_bo_rd32(priv->bo, i*4);
165	}
166
167	return priv->suspend != NULL;
168}
169
170static void
171nv84_fence_resume(struct nouveau_drm *drm)
172{
173	struct nv84_fence_priv *priv = drm->fence;
174	int i;
175
176	if (priv->suspend) {
177		for (i = 0; i < drm->chan_total; i++)
178			nouveau_bo_wr32(priv->bo, i*4, priv->suspend[i]);
179		vfree(priv->suspend);
180		priv->suspend = NULL;
181	}
182}
183
184static void
185nv84_fence_destroy(struct nouveau_drm *drm)
186{
187	struct nv84_fence_priv *priv = drm->fence;
188	nouveau_bo_unmap(priv->bo);
189	if (priv->bo)
190		nouveau_bo_unpin(priv->bo);
191	nouveau_bo_ref(NULL, &priv->bo);
192	drm->fence = NULL;
193	kfree(priv);
194}
195
196int
197nv84_fence_create(struct nouveau_drm *drm)
198{
199	struct nv84_fence_priv *priv;
200	u32 domain;
201	int ret;
202
203	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
204	if (!priv)
205		return -ENOMEM;
206
207	priv->base.dtor = nv84_fence_destroy;
208	priv->base.suspend = nv84_fence_suspend;
209	priv->base.resume = nv84_fence_resume;
210	priv->base.context_new = nv84_fence_context_new;
211	priv->base.context_del = nv84_fence_context_del;
212
213	priv->base.uevent = true;
214
215	mutex_init(&priv->mutex);
216
217	/* Use VRAM if there is any ; otherwise fallback to system memory */
218	domain = drm->client.device.info.ram_size != 0 ?
219		NOUVEAU_GEM_DOMAIN_VRAM :
220		 /*
221		  * fences created in sysmem must be non-cached or we
222		  * will lose CPU/GPU coherency!
223		  */
224		NOUVEAU_GEM_DOMAIN_GART | NOUVEAU_GEM_DOMAIN_COHERENT;
225	ret = nouveau_bo_new(&drm->client, 16 * drm->chan_total, 0,
226			     domain, 0, 0, NULL, NULL, &priv->bo);
227	if (ret == 0) {
228		ret = nouveau_bo_pin(priv->bo, domain, false);
229		if (ret == 0) {
230			ret = nouveau_bo_map(priv->bo);
231			if (ret)
232				nouveau_bo_unpin(priv->bo);
233		}
234		if (ret)
235			nouveau_bo_ref(NULL, &priv->bo);
236	}
237
238	if (ret)
239		nv84_fence_destroy(drm);
240	return ret;
241}
242