9952f6918d
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 228 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.107155473@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
149 lines
3.8 KiB
C
149 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Tegra host1x Interrupt Management
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*
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* Copyright (C) 2010 Google, Inc.
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* Copyright (c) 2010-2013, NVIDIA Corporation.
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*/
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/io.h>
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#include "../intr.h"
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#include "../dev.h"
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/*
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* Sync point threshold interrupt service function
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* Handles sync point threshold triggers, in interrupt context
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*/
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static void host1x_intr_syncpt_handle(struct host1x_syncpt *syncpt)
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{
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unsigned int id = syncpt->id;
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struct host1x *host = syncpt->host;
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host1x_sync_writel(host, BIT(id % 32),
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HOST1X_SYNC_SYNCPT_THRESH_INT_DISABLE(id / 32));
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host1x_sync_writel(host, BIT(id % 32),
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HOST1X_SYNC_SYNCPT_THRESH_CPU0_INT_STATUS(id / 32));
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schedule_work(&syncpt->intr.work);
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}
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static irqreturn_t syncpt_thresh_isr(int irq, void *dev_id)
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{
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struct host1x *host = dev_id;
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unsigned long reg;
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unsigned int i, id;
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for (i = 0; i < DIV_ROUND_UP(host->info->nb_pts, 32); i++) {
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reg = host1x_sync_readl(host,
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HOST1X_SYNC_SYNCPT_THRESH_CPU0_INT_STATUS(i));
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for_each_set_bit(id, ®, 32) {
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struct host1x_syncpt *syncpt =
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host->syncpt + (i * 32 + id);
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host1x_intr_syncpt_handle(syncpt);
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}
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}
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return IRQ_HANDLED;
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}
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static void _host1x_intr_disable_all_syncpt_intrs(struct host1x *host)
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{
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unsigned int i;
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for (i = 0; i < DIV_ROUND_UP(host->info->nb_pts, 32); ++i) {
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host1x_sync_writel(host, 0xffffffffu,
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HOST1X_SYNC_SYNCPT_THRESH_INT_DISABLE(i));
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host1x_sync_writel(host, 0xffffffffu,
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HOST1X_SYNC_SYNCPT_THRESH_CPU0_INT_STATUS(i));
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}
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}
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static void intr_hw_init(struct host1x *host, u32 cpm)
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{
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#if HOST1X_HW < 6
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/* disable the ip_busy_timeout. this prevents write drops */
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host1x_sync_writel(host, 0, HOST1X_SYNC_IP_BUSY_TIMEOUT);
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/*
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* increase the auto-ack timout to the maximum value. 2d will hang
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* otherwise on Tegra2.
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*/
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host1x_sync_writel(host, 0xff, HOST1X_SYNC_CTXSW_TIMEOUT_CFG);
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/* update host clocks per usec */
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host1x_sync_writel(host, cpm, HOST1X_SYNC_USEC_CLK);
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#endif
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}
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static int
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_host1x_intr_init_host_sync(struct host1x *host, u32 cpm,
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void (*syncpt_thresh_work)(struct work_struct *))
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{
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unsigned int i;
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int err;
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host1x_hw_intr_disable_all_syncpt_intrs(host);
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for (i = 0; i < host->info->nb_pts; i++)
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INIT_WORK(&host->syncpt[i].intr.work, syncpt_thresh_work);
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err = devm_request_irq(host->dev, host->intr_syncpt_irq,
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syncpt_thresh_isr, IRQF_SHARED,
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"host1x_syncpt", host);
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if (err < 0) {
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WARN_ON(1);
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return err;
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}
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intr_hw_init(host, cpm);
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return 0;
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}
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static void _host1x_intr_set_syncpt_threshold(struct host1x *host,
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unsigned int id,
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u32 thresh)
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{
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host1x_sync_writel(host, thresh, HOST1X_SYNC_SYNCPT_INT_THRESH(id));
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}
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static void _host1x_intr_enable_syncpt_intr(struct host1x *host,
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unsigned int id)
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{
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host1x_sync_writel(host, BIT(id % 32),
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HOST1X_SYNC_SYNCPT_THRESH_INT_ENABLE_CPU0(id / 32));
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}
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static void _host1x_intr_disable_syncpt_intr(struct host1x *host,
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unsigned int id)
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{
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host1x_sync_writel(host, BIT(id % 32),
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HOST1X_SYNC_SYNCPT_THRESH_INT_DISABLE(id / 32));
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host1x_sync_writel(host, BIT(id % 32),
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HOST1X_SYNC_SYNCPT_THRESH_CPU0_INT_STATUS(id / 32));
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}
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static int _host1x_free_syncpt_irq(struct host1x *host)
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{
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unsigned int i;
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devm_free_irq(host->dev, host->intr_syncpt_irq, host);
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for (i = 0; i < host->info->nb_pts; i++)
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cancel_work_sync(&host->syncpt[i].intr.work);
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return 0;
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}
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static const struct host1x_intr_ops host1x_intr_ops = {
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.init_host_sync = _host1x_intr_init_host_sync,
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.set_syncpt_threshold = _host1x_intr_set_syncpt_threshold,
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.enable_syncpt_intr = _host1x_intr_enable_syncpt_intr,
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.disable_syncpt_intr = _host1x_intr_disable_syncpt_intr,
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.disable_all_syncpt_intrs = _host1x_intr_disable_all_syncpt_intrs,
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.free_syncpt_irq = _host1x_free_syncpt_irq,
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};
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