1 // SPDX-License-Identifier: GPL-2.0-only
3 * Tegra host1x Interrupt Management
5 * Copyright (C) 2010 Google, Inc.
6 * Copyright (c) 2010-2013, NVIDIA Corporation.
9 #include <linux/interrupt.h>
10 #include <linux/irq.h>
17 * Sync point threshold interrupt service function
18 * Handles sync point threshold triggers, in interrupt context
20 static void host1x_intr_syncpt_handle(struct host1x_syncpt
*syncpt
)
22 unsigned int id
= syncpt
->id
;
23 struct host1x
*host
= syncpt
->host
;
25 host1x_sync_writel(host
, BIT(id
% 32),
26 HOST1X_SYNC_SYNCPT_THRESH_INT_DISABLE(id
/ 32));
27 host1x_sync_writel(host
, BIT(id
% 32),
28 HOST1X_SYNC_SYNCPT_THRESH_CPU0_INT_STATUS(id
/ 32));
30 schedule_work(&syncpt
->intr
.work
);
33 static irqreturn_t
syncpt_thresh_isr(int irq
, void *dev_id
)
35 struct host1x
*host
= dev_id
;
39 for (i
= 0; i
< DIV_ROUND_UP(host
->info
->nb_pts
, 32); i
++) {
40 reg
= host1x_sync_readl(host
,
41 HOST1X_SYNC_SYNCPT_THRESH_CPU0_INT_STATUS(i
));
42 for_each_set_bit(id
, ®
, 32) {
43 struct host1x_syncpt
*syncpt
=
44 host
->syncpt
+ (i
* 32 + id
);
45 host1x_intr_syncpt_handle(syncpt
);
52 static void _host1x_intr_disable_all_syncpt_intrs(struct host1x
*host
)
56 for (i
= 0; i
< DIV_ROUND_UP(host
->info
->nb_pts
, 32); ++i
) {
57 host1x_sync_writel(host
, 0xffffffffu
,
58 HOST1X_SYNC_SYNCPT_THRESH_INT_DISABLE(i
));
59 host1x_sync_writel(host
, 0xffffffffu
,
60 HOST1X_SYNC_SYNCPT_THRESH_CPU0_INT_STATUS(i
));
64 static void intr_hw_init(struct host1x
*host
, u32 cpm
)
67 /* disable the ip_busy_timeout. this prevents write drops */
68 host1x_sync_writel(host
, 0, HOST1X_SYNC_IP_BUSY_TIMEOUT
);
71 * increase the auto-ack timout to the maximum value. 2d will hang
72 * otherwise on Tegra2.
74 host1x_sync_writel(host
, 0xff, HOST1X_SYNC_CTXSW_TIMEOUT_CFG
);
76 /* update host clocks per usec */
77 host1x_sync_writel(host
, cpm
, HOST1X_SYNC_USEC_CLK
);
82 _host1x_intr_init_host_sync(struct host1x
*host
, u32 cpm
,
83 void (*syncpt_thresh_work
)(struct work_struct
*))
88 host1x_hw_intr_disable_all_syncpt_intrs(host
);
90 for (i
= 0; i
< host
->info
->nb_pts
; i
++)
91 INIT_WORK(&host
->syncpt
[i
].intr
.work
, syncpt_thresh_work
);
93 err
= devm_request_irq(host
->dev
, host
->intr_syncpt_irq
,
94 syncpt_thresh_isr
, IRQF_SHARED
,
95 "host1x_syncpt", host
);
101 intr_hw_init(host
, cpm
);
106 static void _host1x_intr_set_syncpt_threshold(struct host1x
*host
,
110 host1x_sync_writel(host
, thresh
, HOST1X_SYNC_SYNCPT_INT_THRESH(id
));
113 static void _host1x_intr_enable_syncpt_intr(struct host1x
*host
,
116 host1x_sync_writel(host
, BIT(id
% 32),
117 HOST1X_SYNC_SYNCPT_THRESH_INT_ENABLE_CPU0(id
/ 32));
120 static void _host1x_intr_disable_syncpt_intr(struct host1x
*host
,
123 host1x_sync_writel(host
, BIT(id
% 32),
124 HOST1X_SYNC_SYNCPT_THRESH_INT_DISABLE(id
/ 32));
125 host1x_sync_writel(host
, BIT(id
% 32),
126 HOST1X_SYNC_SYNCPT_THRESH_CPU0_INT_STATUS(id
/ 32));
129 static int _host1x_free_syncpt_irq(struct host1x
*host
)
133 devm_free_irq(host
->dev
, host
->intr_syncpt_irq
, host
);
135 for (i
= 0; i
< host
->info
->nb_pts
; i
++)
136 cancel_work_sync(&host
->syncpt
[i
].intr
.work
);
141 static const struct host1x_intr_ops host1x_intr_ops
= {
142 .init_host_sync
= _host1x_intr_init_host_sync
,
143 .set_syncpt_threshold
= _host1x_intr_set_syncpt_threshold
,
144 .enable_syncpt_intr
= _host1x_intr_enable_syncpt_intr
,
145 .disable_syncpt_intr
= _host1x_intr_disable_syncpt_intr
,
146 .disable_all_syncpt_intrs
= _host1x_intr_disable_all_syncpt_intrs
,
147 .free_syncpt_irq
= _host1x_free_syncpt_irq
,