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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 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 offset += i * sizeof(u32);
50
51 trace_host1x_cdma_push_gather(dev_name(dev), bo,
52 num_words, offset,
53 mem);
54 }
55
56 host1x_bo_munmap(bo, mem);
57 }
58}
59
60static void submit_gathers(struct host1x_job *job)
61{
62 struct host1x_cdma *cdma = &job->channel->cdma;
63 unsigned int i;
64
65 for (i = 0; i < job->num_gathers; i++) {
66 struct host1x_job_gather *g = &job->gathers[i];
67 u32 op1 = host1x_opcode_gather(g->words);
68 u32 op2 = g->base + g->offset;
69 trace_write_gather(cdma, g->bo, g->offset, op1 & 0xffff);
70 host1x_cdma_push(cdma, op1, op2);
71 }
72}
73
74static inline void synchronize_syncpt_base(struct host1x_job *job)
75{
76 struct host1x *host = dev_get_drvdata(job->channel->dev->parent);
77 struct host1x_syncpt *sp = host->syncpt + job->syncpt_id;
78 u32 id, value;
79
80 value = host1x_syncpt_read_max(sp);
81 id = sp->base->id;
82
83 host1x_cdma_push(&job->channel->cdma,
84 host1x_opcode_setclass(HOST1X_CLASS_HOST1X,
85 HOST1X_UCLASS_LOAD_SYNCPT_BASE, 1),
86 HOST1X_UCLASS_LOAD_SYNCPT_BASE_BASE_INDX_F(id) |
87 HOST1X_UCLASS_LOAD_SYNCPT_BASE_VALUE_F(value));
88}
89
90static int channel_submit(struct host1x_job *job)
91{
92 struct host1x_channel *ch = job->channel;
93 struct host1x_syncpt *sp;
94 u32 user_syncpt_incrs = job->syncpt_incrs;
95 u32 prev_max = 0;
96 u32 syncval;
97 int err;
98 struct host1x_waitlist *completed_waiter = NULL;
99 struct host1x *host = dev_get_drvdata(ch->dev->parent);
100
101 sp = host->syncpt + job->syncpt_id;
102 trace_host1x_channel_submit(dev_name(ch->dev),
103 job->num_gathers, job->num_relocs,
104 job->num_waitchk, job->syncpt_id,
105 job->syncpt_incrs);
106
107 /* before error checks, return current max */
108 prev_max = job->syncpt_end = host1x_syncpt_read_max(sp);
109
110 /* get submit lock */
111 err = mutex_lock_interruptible(&ch->submitlock);
112 if (err)
113 goto error;
114
115 completed_waiter = kzalloc(sizeof(*completed_waiter), GFP_KERNEL);
116 if (!completed_waiter) {
117 mutex_unlock(&ch->submitlock);
118 err = -ENOMEM;
119 goto error;
120 }
121
122 /* begin a CDMA submit */
123 err = host1x_cdma_begin(&ch->cdma, job);
124 if (err) {
125 mutex_unlock(&ch->submitlock);
126 goto error;
127 }
128
129 if (job->serialize) {
130 /*
131 * Force serialization by inserting a host wait for the
132 * previous job to finish before this one can commence.
133 */
134 host1x_cdma_push(&ch->cdma,
135 host1x_opcode_setclass(HOST1X_CLASS_HOST1X,
136 host1x_uclass_wait_syncpt_r(), 1),
137 host1x_class_host_wait_syncpt(job->syncpt_id,
138 host1x_syncpt_read_max(sp)));
139 }
140
141 /* Synchronize base register to allow using it for relative waiting */
142 if (sp->base)
143 synchronize_syncpt_base(job);
144
145 syncval = host1x_syncpt_incr_max(sp, user_syncpt_incrs);
146
147 job->syncpt_end = syncval;
148
149 /* add a setclass for modules that require it */
150 if (job->class)
151 host1x_cdma_push(&ch->cdma,
152 host1x_opcode_setclass(job->class, 0, 0),
153 HOST1X_OPCODE_NOP);
154
155 submit_gathers(job);
156
157 /* end CDMA submit & stash pinned hMems into sync queue */
158 host1x_cdma_end(&ch->cdma, job);
159
160 trace_host1x_channel_submitted(dev_name(ch->dev), prev_max, syncval);
161
162 /* schedule a submit complete interrupt */
163 err = host1x_intr_add_action(host, job->syncpt_id, syncval,
164 HOST1X_INTR_ACTION_SUBMIT_COMPLETE, ch,
165 completed_waiter, NULL);
166 completed_waiter = NULL;
167 WARN(err, "Failed to set submit complete interrupt");
168
169 mutex_unlock(&ch->submitlock);
170
171 return 0;
172
173error:
174 kfree(completed_waiter);
175 return err;
176}
177
178static int host1x_channel_init(struct host1x_channel *ch, struct host1x *dev,
179 unsigned int index)
180{
181 ch->id = index;
182 mutex_init(&ch->reflock);
183 mutex_init(&ch->submitlock);
184
185 ch->regs = dev->regs + index * HOST1X_CHANNEL_SIZE;
186 return 0;
187}
188
189static const struct host1x_channel_ops host1x_channel_ops = {
190 .init = host1x_channel_init,
191 .submit = channel_submit,
192};
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};