/*
 * bdc_pci.c - BRCM BDC USB3.0 device controller PCI interface file.
 *
 * Copyright (C) 2014 Broadcom Corporation
 *
 * Author: Ashwini Pahuja
 *
 * Based on drivers under drivers/usb/
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/platform_device.h>

#include "bdc.h"

#define BDC_PCI_PID 0x1570

struct bdc_pci {
	struct device *dev;
	struct platform_device *bdc;
};

static int bdc_setup_msi(struct pci_dev *pci)
{
	int ret;

	ret = pci_enable_msi(pci);
	if (ret) {
		pr_err("failed to allocate MSI entry\n");
		return ret;
	}

	return ret;
}

static int bdc_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
{
	struct resource res[2];
	struct platform_device *bdc;
	struct bdc_pci *glue;
	int ret = -ENOMEM;

	glue = devm_kzalloc(&pci->dev, sizeof(*glue), GFP_KERNEL);
	if (!glue)
		return -ENOMEM;

	glue->dev = &pci->dev;
	ret = pci_enable_device(pci);
	if (ret) {
		dev_err(&pci->dev, "failed to enable pci device\n");
		return -ENODEV;
	}
	pci_set_master(pci);

	bdc = platform_device_alloc(BRCM_BDC_NAME, PLATFORM_DEVID_AUTO);
	if (!bdc)
		return -ENOMEM;

	memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
	bdc_setup_msi(pci);

	res[0].start	= pci_resource_start(pci, 0);
	res[0].end	= pci_resource_end(pci, 0);
	res[0].name	= BRCM_BDC_NAME;
	res[0].flags	= IORESOURCE_MEM;

	res[1].start	= pci->irq;
	res[1].name	= BRCM_BDC_NAME;
	res[1].flags	= IORESOURCE_IRQ;

	ret = platform_device_add_resources(bdc, res, ARRAY_SIZE(res));
	if (ret) {
		dev_err(&pci->dev,
			"couldn't add resources to bdc device\n");
		return ret;
	}

	pci_set_drvdata(pci, glue);

	dma_set_coherent_mask(&bdc->dev, pci->dev.coherent_dma_mask);

	bdc->dev.dma_mask = pci->dev.dma_mask;
	bdc->dev.dma_parms = pci->dev.dma_parms;
	bdc->dev.parent = &pci->dev;
	glue->bdc = bdc;

	ret = platform_device_add(bdc);
	if (ret) {
		dev_err(&pci->dev, "failed to register bdc device\n");
		platform_device_put(bdc);
		return ret;
	}

	return 0;
}

static void bdc_pci_remove(struct pci_dev *pci)
{
	struct bdc_pci *glue = pci_get_drvdata(pci);

	platform_device_unregister(glue->bdc);
	pci_disable_msi(pci);
}

static struct pci_device_id bdc_pci_id_table[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, BDC_PCI_PID), },
	{} /* Terminating Entry */
};

MODULE_DEVICE_TABLE(pci, bdc_pci_id_table);

static struct pci_driver bdc_pci_driver = {
	.name = "bdc-pci",
	.id_table = bdc_pci_id_table,
	.probe = bdc_pci_probe,
	.remove = bdc_pci_remove,
};

MODULE_AUTHOR("Ashwini Pahuja <ashwini.linux@gmail.com>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("BRCM BDC USB3 PCI Glue layer");
module_pci_driver(bdc_pci_driver);
ext.git/commit/drivers/usb?id=08d85f3ea99f1eeafc4e8507936190e86a16ee8c'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial?id=08d85f3ea99f1eeafc4e8507936190e86a16ee8c'>serial</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/cypress_m8.c?id=08d85f3ea99f1eeafc4e8507936190e86a16ee8c'>cypress_m8.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='08d85f3ea99f1eeafc4e8507936190e86a16ee8c'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='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>Marc Zyngier &lt;marc.zyngier@arm.com&gt;</td><td class='right'>2017-01-17 16:00:48 +0000</td></tr>
<tr><th>committer</th><td>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2017-01-30 15:18:56 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/cypress_m8.c?id=08d85f3ea99f1eeafc4e8507936190e86a16ee8c'>08d85f3ea99f1eeafc4e8507936190e86a16ee8c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/serial/cypress_m8.c?id=08d85f3ea99f1eeafc4e8507936190e86a16ee8c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=08d85f3ea99f1eeafc4e8507936190e86a16ee8c'>410bb1acd0cd7dcfaad37ae7b63ff243b7fa4bee</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/serial/cypress_m8.c?id=08d85f3ea99f1eeafc4e8507936190e86a16ee8c'>drivers/usb/serial/cypress_m8.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/cypress_m8.c?id=566cf877a1fcb6d6dc0126b076aad062054c2637'>566cf877a1fcb6d6dc0126b076aad062054c2637</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/serial/cypress_m8.c?id=08d85f3ea99f1eeafc4e8507936190e86a16ee8c&amp;id2=566cf877a1fcb6d6dc0126b076aad062054c2637'>diff</a>)</td></tr></table>
<div class='commit-subject'>irqdomain: Avoid activating interrupts more than once</div><div class='commit-msg'>Since commit f3b0946d629c ("genirq/msi: Make sure PCI MSIs are
activated early"), we can end-up activating a PCI/MSI twice (once
at allocation time, and once at startup time).

This is normally of no consequences, except that there is some
HW out there that may misbehave if activate is used more than once
(the GICv3 ITS, for example, uses the activate callback
to issue the MAPVI command, and the architecture spec says that
"If there is an existing mapping for the EventID-DeviceID
combination, behavior is UNPREDICTABLE").

While this could be worked around in each individual driver, it may
make more sense to tackle the issue at the core level. In order to
avoid getting in that situation, let's have a per-interrupt flag
to remember if we have already activated that interrupt or not.

Fixes: f3b0946d629c ("genirq/msi: Make sure PCI MSIs are activated early")
Reported-and-tested-by: Andre Przywara &lt;andre.przywara@arm.com&gt;
Signed-off-by: Marc Zyngier &lt;marc.zyngier@arm.com&gt;
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1484668848-24361-1-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;

</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=08d85f3ea99f1eeafc4e8507936190e86a16ee8c'>Diffstat</a> (limited to 'drivers/usb/serial/cypress_m8.c')</div><table summary='diffstat' class='diffstat'>