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