1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
/*
* Tegra host1x Channel
*
* Copyright (c) 2010-2013, NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/host1x.h>
#include <linux/slab.h>
#include <trace/events/host1x.h>
#include "../channel.h"
#include "../dev.h"
#include "../intr.h"
#include "../job.h"
#define HOST1X_CHANNEL_SIZE 16384
#define TRACE_MAX_LENGTH 128U
static void trace_write_gather(struct host1x_cdma *cdma, struct host1x_bo *bo,
u32 offset, u32 words)
{
struct device *dev = cdma_to_channel(cdma)->dev;
void *mem = NULL;
if (host1x_debug_trace_cmdbuf)
mem = host1x_bo_mmap(bo);
if (mem) {
u32 i;
/*
* Write in batches of 128 as there seems to be a limit
* of how much you can output to ftrace at once.
*/
for (i = 0; i < words; i += TRACE_MAX_LENGTH) {
u32 num_words = min(words - i, TRACE_MAX_LENGTH);
offset += i * sizeof(u32);
trace_host1x_cdma_push_gather(dev_name(dev), bo,
num_words, offset,
mem);
}
host1x_bo_munmap(bo, mem);
}
}
static void submit_gathers(struct host1x_job *job)
{
struct host1x_cdma *cdma = &job->channel->cdma;
unsigned int i;
for (i = 0; i < job->num_gathers; i++) {
struct host1x_job_gather *g = &job->gathers[i];
u32 op1 = host1x_opcode_gather(g->words);
u32 op2 = g->base + g->offset;
trace_write_gather(cdma, g->bo, g->offset, op1 & 0xffff);
host1x_cdma_push(cdma, op1, op2);
}
}
static inline void synchronize_syncpt_base(struct host1x_job *job)
{
struct host1x *host = dev_get_drvdata(job->channel->dev->parent);
struct host1x_syncpt *sp = host->syncpt + job->syncpt_id;
unsigned int id;
u32 value;
value = host1x_syncpt_read_max(sp);
id = sp->base->id;
host1x_cdma_push(&job->channel->cdma,
host1x_opcode_setclass(HOST1X_CLASS_HOST1X,
HOST1X_UCLASS_LOAD_SYNCPT_BASE, 1),
HOST1X_UCLASS_LOAD_SYNCPT_BASE_BASE_INDX_F(id) |
HOST1X_UCLASS_LOAD_SYNCPT_BASE_VALUE_F(value));
}
static int channel_submit(struct host1x_job *job)
{
struct host1x_channel *ch = job->channel;
struct host1x_syncpt *sp;
u32 user_syncpt_incrs = job->syncpt_incrs;
u32 prev_max = 0;
u32 syncval;
int err;
struct host1x_waitlist *completed_waiter = NULL;
struct host1x *host = dev_get_drvdata(ch->dev->parent);
sp = host->syncpt + job->syncpt_id;
trace_host1x_channel_submit(dev_name(ch->dev),
job->num_gathers, job->num_relocs,
job->num_waitchk, job->syncpt_id,
job->syncpt_incrs);
/* before error checks, return current max */
prev_max = job->syncpt_end = host1x_syncpt_read_max(sp);
/* get submit lock */
err = mutex_lock_interruptible(&ch->submitlock);
if (err)
goto error;
completed_waiter = kzalloc(sizeof(*completed_waiter), GFP_KERNEL);
if (!completed_waiter) {
mutex_unlock(&ch->submitlock);
err = -ENOMEM;
goto error;
}
/* begin a CDMA submit */
err = host1x_cdma_begin(&ch->cdma, job);
if (err) {
mutex_unlock(&ch->submitlock);
goto error;
}
if (job->serialize) {
/*
* Force serialization by inserting a host wait for the
* previous job to finish before this one can commence.
*/
host1x_cdma_push(&ch->cdma,
host1x_opcode_setclass(HOST1X_CLASS_HOST1X,
host1x_uclass_wait_syncpt_r(), 1),
host1x_class_host_wait_syncpt(job->syncpt_id,
host1x_syncpt_read_max(sp)));
}
/* Synchronize base register to allow using it for relative waiting */
if (sp->base)
synchronize_syncpt_base(job);
syncval = host1x_syncpt_incr_max(sp, user_syncpt_incrs);
job->syncpt_end = syncval;
/* add a setclass for modules that require it */
if (job->class)
host1x_cdma_push(&ch->cdma,
host1x_opcode_setclass(job->class, 0, 0),
HOST1X_OPCODE_NOP);
submit_gathers(job);
/* end CDMA submit & stash pinned hMems into sync queue */
host1x_cdma_end(&ch->cdma, job);
trace_host1x_channel_submitted(dev_name(ch->dev), prev_max, syncval);
/* schedule a submit complete interrupt */
err = host1x_intr_add_action(host, job->syncpt_id, syncval,
HOST1X_INTR_ACTION_SUBMIT_COMPLETE, ch,
completed_waiter, NULL);
completed_waiter = NULL;
WARN(err, "Failed to set submit complete interrupt");
mutex_unlock(&ch->submitlock);
return 0;
error:
kfree(completed_waiter);
return err;
}
static int host1x_channel_init(struct host1x_channel *ch, struct host1x *dev,
unsigned int index)
{
ch->id = index;
mutex_init(&ch->reflock);
mutex_init(&ch->submitlock);
ch->regs = dev->regs + index * HOST1X_CHANNEL_SIZE;
return 0;
}
static const struct host1x_channel_ops host1x_channel_ops = {
.init = host1x_channel_init,
.submit = channel_submit,
};
|
