/*
 * intel_soc_dts_thermal.c
 * Copyright (c) 2014, Intel 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.
 *
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/interrupt.h>
#include <asm/cpu_device_id.h>
#include <asm/intel-family.h>
#include "intel_soc_dts_iosf.h"

#define CRITICAL_OFFSET_FROM_TJ_MAX	5000

static int crit_offset = CRITICAL_OFFSET_FROM_TJ_MAX;
module_param(crit_offset, int, 0644);
MODULE_PARM_DESC(crit_offset,
	"Critical Temperature offset from tj max in millidegree Celsius.");

/* IRQ 86 is a fixed APIC interrupt for BYT DTS Aux threshold notifications */
#define BYT_SOC_DTS_APIC_IRQ	86

static int soc_dts_thres_irq;
static struct intel_soc_dts_sensors *soc_dts;

static irqreturn_t soc_irq_thread_fn(int irq, void *dev_data)
{
	pr_debug("proc_thermal_interrupt\n");
	intel_soc_dts_iosf_interrupt_handler(soc_dts);

	return IRQ_HANDLED;
}

static const struct x86_cpu_id soc_thermal_ids[] = {
	{ X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT1, 0,
		BYT_SOC_DTS_APIC_IRQ},
	{}
};
MODULE_DEVICE_TABLE(x86cpu, soc_thermal_ids);

static int __init intel_soc_thermal_init(void)
{
	int err = 0;
	const struct x86_cpu_id *match_cpu;

	match_cpu = x86_match_cpu(soc_thermal_ids);
	if (!match_cpu)
		return -ENODEV;

	/* Create a zone with 2 trips with marked as read only */
	soc_dts = intel_soc_dts_iosf_init(INTEL_SOC_DTS_INTERRUPT_APIC, 2, 1);
	if (IS_ERR(soc_dts)) {
		err = PTR_ERR(soc_dts);
		return err;
	}

	soc_dts_thres_irq = (int)match_cpu->driver_data;

	if (soc_dts_thres_irq) {
		err = request_threaded_irq(soc_dts_thres_irq, NULL,
					   soc_irq_thread_fn,
					   IRQF_TRIGGER_RISING | IRQF_ONESHOT,
					   "soc_dts", soc_dts);
		if (err) {
			pr_err("request_threaded_irq ret %d\n", err);
			goto error_irq;
		}
	}

	err = intel_soc_dts_iosf_add_read_only_critical_trip(soc_dts,
							     crit_offset);
	if (err)
		goto error_trips;

	return 0;

error_trips:
	if (soc_dts_thres_irq)
		free_irq(soc_dts_thres_irq, soc_dts);
error_irq:
	intel_soc_dts_iosf_exit(soc_dts);

	return err;
}

static void __exit intel_soc_thermal_exit(void)
{
	if (soc_dts_thres_irq)
		free_irq(soc_dts_thres_irq, soc_dts);
	intel_soc_dts_iosf_exit(soc_dts);
}

module_init(intel_soc_thermal_init)
module_exit(intel_soc_thermal_exit)

MODULE_DESCRIPTION("Intel SoC DTS Thermal Driver");
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
MODULE_LICENSE("GPL v2");
lue='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Murali Karicheri &lt;m-karicheri2@ti.com&gt;</td><td class='right'>2017-01-04 14:32:30 -0500</td></tr>
<tr><th>committer</th><td>Bjorn Helgaas &lt;bhelgaas@google.com&gt;</td><td class='right'>2017-01-10 08:43:24 -0600</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=a782b5f986c3fa1cfa7f2b57941200c6a5809242'>a782b5f986c3fa1cfa7f2b57941200c6a5809242</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=a782b5f986c3fa1cfa7f2b57941200c6a5809242'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=a782b5f986c3fa1cfa7f2b57941200c6a5809242'>6daa542c4e59cd3900912bb109726c00f5ec11f8</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=7ce7d89f48834cefece7804d38fc5d85382edf77'>7ce7d89f48834cefece7804d38fc5d85382edf77</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=a782b5f986c3fa1cfa7f2b57941200c6a5809242&amp;id2=7ce7d89f48834cefece7804d38fc5d85382edf77'>diff</a>)</td></tr></table>
<div class='commit-subject'>PCI: designware: Check for iATU unroll only on platforms that use ATU</div><div class='commit-msg'>Previously we checked for iATU unroll support by reading PCIE_ATU_VIEWPORT
even on platforms, e.g., Keystone, that do not have ATU ports.  This can
cause bad behavior such as asynchronous external aborts:

  OF: PCI:   MEM 0x60000000..0x6fffffff -&gt; 0x60000000
  Unhandled fault: asynchronous external abort (0x1211) at 0x00000000
  pgd = c0003000
  [00000000] *pgd=80000800004003, *pmd=00000000
  Internal error: : 1211 [#1] PREEMPT SMP ARM
  Modules linked in:
  CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.9.0-00009-g6ff59d2-dirty #7
  Hardware name: Keystone
  task: eb878000 task.stack: eb866000
  PC is at dw_pcie_setup_rc+0x24/0x380
  LR is at ks_pcie_host_init+0x10/0x170

Move the dw_pcie_iatu_unroll_enabled() check so we only call it on
platforms that do not use the ATU.  These platforms supply their own
-&gt;rd_other_conf() and -&gt;wr_other_conf() methods.

[bhelgaas: changelog]
Fixes: a0601a470537 ("PCI: designware: Add iATU Unroll feature")
Fixes: 416379f9ebde ("PCI: designware: Check for iATU unroll support after initializing host")
Tested-by: Kishon Vijay Abraham I &lt;kishon@ti.com&gt;
Signed-off-by: Murali Karicheri &lt;m-karicheri2@ti.com&gt;
Signed-off-by: Bjorn Helgaas &lt;bhelgaas@google.com&gt;
Acked-By: Joao Pinto &lt;jpinto@synopsys.com&gt;
CC: stable@vger.kernel.org	# v4.9+</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=a782b5f986c3fa1cfa7f2b57941200c6a5809242'>Diffstat</a></div><table summary='diffstat' class='diffstat'>