4 * Copyright (c) 2010-2013, NVIDIA Corporation.
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.
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
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/>.
19 #include <linux/host1x.h>
20 #include <linux/slab.h>
22 #include <trace/events/host1x.h>
24 #include "../channel.h"
29 #define HOST1X_CHANNEL_SIZE 16384
30 #define TRACE_MAX_LENGTH 128U
32 static void trace_write_gather(struct host1x_cdma *cdma, struct host1x_bo *bo,
33 u32 offset, u32 words)
35 struct device *dev = cdma_to_channel(cdma)->dev;
38 if (host1x_debug_trace_cmdbuf)
39 mem = host1x_bo_mmap(bo);
44 * Write in batches of 128 as there seems to be a limit
45 * of how much you can output to ftrace at once.
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);
51 trace_host1x_cdma_push_gather(dev_name(dev), bo,
56 host1x_bo_munmap(bo, mem);
60 static void submit_gathers(struct host1x_job *job)
62 struct host1x_cdma *cdma = &job->channel->cdma;
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);
74 static inline void synchronize_syncpt_base(struct host1x_job *job)
76 struct host1x *host = dev_get_drvdata(job->channel->dev->parent);
77 struct host1x_syncpt *sp = host->syncpt + job->syncpt_id;
80 value = host1x_syncpt_read_max(sp);
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));
90 static int channel_submit(struct host1x_job *job)
92 struct host1x_channel *ch = job->channel;
93 struct host1x_syncpt *sp;
94 u32 user_syncpt_incrs = job->syncpt_incrs;
98 struct host1x_waitlist *completed_waiter = NULL;
99 struct host1x *host = dev_get_drvdata(ch->dev->parent);
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,
107 /* before error checks, return current max */
108 prev_max = job->syncpt_end = host1x_syncpt_read_max(sp);
110 /* get submit lock */
111 err = mutex_lock_interruptible(&ch->submitlock);
115 completed_waiter = kzalloc(sizeof(*completed_waiter), GFP_KERNEL);
116 if (!completed_waiter) {
117 mutex_unlock(&ch->submitlock);
122 /* begin a CDMA submit */
123 err = host1x_cdma_begin(&ch->cdma, job);
125 mutex_unlock(&ch->submitlock);
129 if (job->serialize) {
131 * Force serialization by inserting a host wait for the
132 * previous job to finish before this one can commence.
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)));
141 /* Synchronize base register to allow using it for relative waiting */
143 synchronize_syncpt_base(job);
145 syncval = host1x_syncpt_incr_max(sp, user_syncpt_incrs);
147 job->syncpt_end = syncval;
149 /* add a setclass for modules that require it */
151 host1x_cdma_push(&ch->cdma,
152 host1x_opcode_setclass(job->class, 0, 0),
157 /* end CDMA submit & stash pinned hMems into sync queue */
158 host1x_cdma_end(&ch->cdma, job);
160 trace_host1x_channel_submitted(dev_name(ch->dev), prev_max, syncval);
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");
169 mutex_unlock(&ch->submitlock);
174 kfree(completed_waiter);
178 static int host1x_channel_init(struct host1x_channel *ch, struct host1x *dev,
182 mutex_init(&ch->reflock);
183 mutex_init(&ch->submitlock);
185 ch->regs = dev->regs + index * HOST1X_CHANNEL_SIZE;
189 static const struct host1x_channel_ops host1x_channel_ops = {
190 .init = host1x_channel_init,
191 .submit = channel_submit,