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 TRACE_MAX_LENGTH 128U
31 static void trace_write_gather(struct host1x_cdma
*cdma
, struct host1x_bo
*bo
,
32 u32 offset
, u32 words
)
34 struct device
*dev
= cdma_to_channel(cdma
)->dev
;
37 if (host1x_debug_trace_cmdbuf
)
38 mem
= host1x_bo_mmap(bo
);
43 * Write in batches of 128 as there seems to be a limit
44 * of how much you can output to ftrace at once.
46 for (i
= 0; i
< words
; i
+= TRACE_MAX_LENGTH
) {
47 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
;
70 trace_write_gather(cdma
, g
->bo
, g
->offset
, op1
& 0xffff);
71 host1x_cdma_push(cdma
, op1
, op2
);
75 static inline void synchronize_syncpt_base(struct host1x_job
*job
)
77 struct host1x
*host
= dev_get_drvdata(job
->channel
->dev
->parent
);
78 struct host1x_syncpt
*sp
= host
->syncpt
+ job
->syncpt_id
;
82 value
= host1x_syncpt_read_max(sp
);
85 host1x_cdma_push(&job
->channel
->cdma
,
86 host1x_opcode_setclass(HOST1X_CLASS_HOST1X
,
87 HOST1X_UCLASS_LOAD_SYNCPT_BASE
, 1),
88 HOST1X_UCLASS_LOAD_SYNCPT_BASE_BASE_INDX_F(id
) |
89 HOST1X_UCLASS_LOAD_SYNCPT_BASE_VALUE_F(value
));
92 static int channel_submit(struct host1x_job
*job
)
94 struct host1x_channel
*ch
= job
->channel
;
95 struct host1x_syncpt
*sp
;
96 u32 user_syncpt_incrs
= job
->syncpt_incrs
;
100 struct host1x_waitlist
*completed_waiter
= NULL
;
101 struct host1x
*host
= dev_get_drvdata(ch
->dev
->parent
);
103 sp
= host
->syncpt
+ job
->syncpt_id
;
104 trace_host1x_channel_submit(dev_name(ch
->dev
),
105 job
->num_gathers
, job
->num_relocs
,
106 job
->syncpt_id
, job
->syncpt_incrs
);
108 /* before error checks, return current max */
109 prev_max
= job
->syncpt_end
= host1x_syncpt_read_max(sp
);
111 /* get submit lock */
112 err
= mutex_lock_interruptible(&ch
->submitlock
);
116 completed_waiter
= kzalloc(sizeof(*completed_waiter
), GFP_KERNEL
);
117 if (!completed_waiter
) {
118 mutex_unlock(&ch
->submitlock
);
123 /* begin a CDMA submit */
124 err
= host1x_cdma_begin(&ch
->cdma
, job
);
126 mutex_unlock(&ch
->submitlock
);
130 if (job
->serialize
) {
132 * Force serialization by inserting a host wait for the
133 * previous job to finish before this one can commence.
135 host1x_cdma_push(&ch
->cdma
,
136 host1x_opcode_setclass(HOST1X_CLASS_HOST1X
,
137 host1x_uclass_wait_syncpt_r(), 1),
138 host1x_class_host_wait_syncpt(job
->syncpt_id
,
139 host1x_syncpt_read_max(sp
)));
142 /* Synchronize base register to allow using it for relative waiting */
144 synchronize_syncpt_base(job
);
146 syncval
= host1x_syncpt_incr_max(sp
, user_syncpt_incrs
);
148 host1x_hw_syncpt_assign_to_channel(host
, sp
, ch
);
150 job
->syncpt_end
= syncval
;
152 /* add a setclass for modules that require it */
154 host1x_cdma_push(&ch
->cdma
,
155 host1x_opcode_setclass(job
->class, 0, 0),
160 /* end CDMA submit & stash pinned hMems into sync queue */
161 host1x_cdma_end(&ch
->cdma
, job
);
163 trace_host1x_channel_submitted(dev_name(ch
->dev
), prev_max
, syncval
);
165 /* schedule a submit complete interrupt */
166 err
= host1x_intr_add_action(host
, sp
, 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");
172 mutex_unlock(&ch
->submitlock
);
177 kfree(completed_waiter
);
181 static void enable_gather_filter(struct host1x
*host
,
182 struct host1x_channel
*ch
)
190 val
= host1x_hypervisor_readl(
191 host
, HOST1X_HV_CH_KERNEL_FILTER_GBUFFER(ch
->id
/ 32));
192 val
|= BIT(ch
->id
% 32);
193 host1x_hypervisor_writel(
194 host
, val
, HOST1X_HV_CH_KERNEL_FILTER_GBUFFER(ch
->id
/ 32));
197 HOST1X_CHANNEL_CHANNELCTRL_KERNEL_FILTER_GBUFFER(1),
198 HOST1X_CHANNEL_CHANNELCTRL
);
202 static int host1x_channel_init(struct host1x_channel
*ch
, struct host1x
*dev
,
206 ch
->regs
= dev
->regs
+ index
* 0x4000;
208 ch
->regs
= dev
->regs
+ index
* 0x100;
210 enable_gather_filter(dev
, ch
);
214 static const struct host1x_channel_ops host1x_channel_ops
= {
215 .init
= host1x_channel_init
,
216 .submit
= channel_submit
,