153 lines
4.2 KiB
C
153 lines
4.2 KiB
C
/*
|
|
* Tegra host1x Interrupt Management
|
|
*
|
|
* Copyright (C) 2010 Google, Inc.
|
|
* Copyright (c) 2010-2013, NVIDIA Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/io.h>
|
|
|
|
#include "../intr.h"
|
|
#include "../dev.h"
|
|
|
|
/*
|
|
* Sync point threshold interrupt service function
|
|
* Handles sync point threshold triggers, in interrupt context
|
|
*/
|
|
static void host1x_intr_syncpt_handle(struct host1x_syncpt *syncpt)
|
|
{
|
|
unsigned int id = syncpt->id;
|
|
struct host1x *host = syncpt->host;
|
|
|
|
host1x_sync_writel(host, BIT(id % 32),
|
|
HOST1X_SYNC_SYNCPT_THRESH_INT_DISABLE(id / 32));
|
|
host1x_sync_writel(host, BIT(id % 32),
|
|
HOST1X_SYNC_SYNCPT_THRESH_CPU0_INT_STATUS(id / 32));
|
|
|
|
schedule_work(&syncpt->intr.work);
|
|
}
|
|
|
|
static irqreturn_t syncpt_thresh_isr(int irq, void *dev_id)
|
|
{
|
|
struct host1x *host = dev_id;
|
|
unsigned long reg;
|
|
unsigned int i, id;
|
|
|
|
for (i = 0; i < DIV_ROUND_UP(host->info->nb_pts, 32); i++) {
|
|
reg = host1x_sync_readl(host,
|
|
HOST1X_SYNC_SYNCPT_THRESH_CPU0_INT_STATUS(i));
|
|
for_each_set_bit(id, ®, 32) {
|
|
struct host1x_syncpt *syncpt =
|
|
host->syncpt + (i * 32 + id);
|
|
host1x_intr_syncpt_handle(syncpt);
|
|
}
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void _host1x_intr_disable_all_syncpt_intrs(struct host1x *host)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < DIV_ROUND_UP(host->info->nb_pts, 32); ++i) {
|
|
host1x_sync_writel(host, 0xffffffffu,
|
|
HOST1X_SYNC_SYNCPT_THRESH_INT_DISABLE(i));
|
|
host1x_sync_writel(host, 0xffffffffu,
|
|
HOST1X_SYNC_SYNCPT_THRESH_CPU0_INT_STATUS(i));
|
|
}
|
|
}
|
|
|
|
static int
|
|
_host1x_intr_init_host_sync(struct host1x *host, u32 cpm,
|
|
void (*syncpt_thresh_work)(struct work_struct *))
|
|
{
|
|
unsigned int i;
|
|
int err;
|
|
|
|
host1x_hw_intr_disable_all_syncpt_intrs(host);
|
|
|
|
for (i = 0; i < host->info->nb_pts; i++)
|
|
INIT_WORK(&host->syncpt[i].intr.work, syncpt_thresh_work);
|
|
|
|
err = devm_request_irq(host->dev, host->intr_syncpt_irq,
|
|
syncpt_thresh_isr, IRQF_SHARED,
|
|
"host1x_syncpt", host);
|
|
if (err < 0) {
|
|
WARN_ON(1);
|
|
return err;
|
|
}
|
|
|
|
/* disable the ip_busy_timeout. this prevents write drops */
|
|
host1x_sync_writel(host, 0, HOST1X_SYNC_IP_BUSY_TIMEOUT);
|
|
|
|
/*
|
|
* increase the auto-ack timout to the maximum value. 2d will hang
|
|
* otherwise on Tegra2.
|
|
*/
|
|
host1x_sync_writel(host, 0xff, HOST1X_SYNC_CTXSW_TIMEOUT_CFG);
|
|
|
|
/* update host clocks per usec */
|
|
host1x_sync_writel(host, cpm, HOST1X_SYNC_USEC_CLK);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void _host1x_intr_set_syncpt_threshold(struct host1x *host,
|
|
unsigned int id,
|
|
u32 thresh)
|
|
{
|
|
host1x_sync_writel(host, thresh, HOST1X_SYNC_SYNCPT_INT_THRESH(id));
|
|
}
|
|
|
|
static void _host1x_intr_enable_syncpt_intr(struct host1x *host,
|
|
unsigned int id)
|
|
{
|
|
host1x_sync_writel(host, BIT(id % 32),
|
|
HOST1X_SYNC_SYNCPT_THRESH_INT_ENABLE_CPU0(id / 32));
|
|
}
|
|
|
|
static void _host1x_intr_disable_syncpt_intr(struct host1x *host,
|
|
unsigned int id)
|
|
{
|
|
host1x_sync_writel(host, BIT(id % 32),
|
|
HOST1X_SYNC_SYNCPT_THRESH_INT_DISABLE(id / 32));
|
|
host1x_sync_writel(host, BIT(id % 32),
|
|
HOST1X_SYNC_SYNCPT_THRESH_CPU0_INT_STATUS(id / 32));
|
|
}
|
|
|
|
static int _host1x_free_syncpt_irq(struct host1x *host)
|
|
{
|
|
unsigned int i;
|
|
|
|
devm_free_irq(host->dev, host->intr_syncpt_irq, host);
|
|
|
|
for (i = 0; i < host->info->nb_pts; i++)
|
|
cancel_work_sync(&host->syncpt[i].intr.work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct host1x_intr_ops host1x_intr_ops = {
|
|
.init_host_sync = _host1x_intr_init_host_sync,
|
|
.set_syncpt_threshold = _host1x_intr_set_syncpt_threshold,
|
|
.enable_syncpt_intr = _host1x_intr_enable_syncpt_intr,
|
|
.disable_syncpt_intr = _host1x_intr_disable_syncpt_intr,
|
|
.disable_all_syncpt_intrs = _host1x_intr_disable_all_syncpt_intrs,
|
|
.free_syncpt_irq = _host1x_free_syncpt_irq,
|
|
};
|