/*
 * EEH functionality support for VFIO devices. The feature is only
 * available on sPAPR compatible platforms.
 *
 * Copyright Gavin Shan, IBM Corporation 2014.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/vfio.h>
#include <asm/eeh.h>

#define DRIVER_VERSION	"0.1"
#define DRIVER_AUTHOR	"Gavin Shan, IBM Corporation"
#define DRIVER_DESC	"VFIO IOMMU SPAPR EEH"

/* We might build address mapping here for "fast" path later */
void vfio_spapr_pci_eeh_open(struct pci_dev *pdev)
{
	eeh_dev_open(pdev);
}
EXPORT_SYMBOL_GPL(vfio_spapr_pci_eeh_open);

void vfio_spapr_pci_eeh_release(struct pci_dev *pdev)
{
	eeh_dev_release(pdev);
}
EXPORT_SYMBOL_GPL(vfio_spapr_pci_eeh_release);

long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group,
				unsigned int cmd, unsigned long arg)
{
	struct eeh_pe *pe;
	struct vfio_eeh_pe_op op;
	unsigned long minsz;
	long ret = -EINVAL;

	switch (cmd) {
	case VFIO_CHECK_EXTENSION:
		if (arg == VFIO_EEH)
			ret = eeh_enabled() ? 1 : 0;
		else
			ret = 0;
		break;
	case VFIO_EEH_PE_OP:
		pe = eeh_iommu_group_to_pe(group);
		if (!pe)
			return -ENODEV;

		minsz = offsetofend(struct vfio_eeh_pe_op, op);
		if (copy_from_user(&op, (void __user *)arg, minsz))
			return -EFAULT;
		if (op.argsz < minsz || op.flags)
			return -EINVAL;

		switch (op.op) {
		case VFIO_EEH_PE_DISABLE:
			ret = eeh_pe_set_option(pe, EEH_OPT_DISABLE);
			break;
		case VFIO_EEH_PE_ENABLE:
			ret = eeh_pe_set_option(pe, EEH_OPT_ENABLE);
			break;
		case VFIO_EEH_PE_UNFREEZE_IO:
			ret = eeh_pe_set_option(pe, EEH_OPT_THAW_MMIO);
			break;
		case VFIO_EEH_PE_UNFREEZE_DMA:
			ret = eeh_pe_set_option(pe, EEH_OPT_THAW_DMA);
			break;
		case VFIO_EEH_PE_GET_STATE:
			ret = eeh_pe_get_state(pe);
			break;
		case VFIO_EEH_PE_RESET_DEACTIVATE:
			ret = eeh_pe_reset(pe, EEH_RESET_DEACTIVATE);
			break;
		case VFIO_EEH_PE_RESET_HOT:
			ret = eeh_pe_reset(pe, EEH_RESET_HOT);
			break;
		case VFIO_EEH_PE_RESET_FUNDAMENTAL:
			ret = eeh_pe_reset(pe, EEH_RESET_FUNDAMENTAL);
			break;
		case VFIO_EEH_PE_CONFIGURE:
			ret = eeh_pe_configure(pe);
			break;
		case VFIO_EEH_PE_INJECT_ERR:
			minsz = offsetofend(struct vfio_eeh_pe_op, err.mask);
			if (op.argsz < minsz)
				return -EINVAL;
			if (copy_from_user(&op, (void __user *)arg, minsz))
				return -EFAULT;

			ret = eeh_pe_inject_err(pe, op.err.type, op.err.func,
						op.err.addr, op.err.mask);
			break;
		default:
			ret = -EINVAL;
		}
	}

	return ret;
}
EXPORT_SYMBOL_GPL(vfio_spapr_iommu_eeh_ioctl);

MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
<a href='/cgit.cgi/linux/net-next.git/commit/tools/testing?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>testing</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='53a20465e6b674eb6ce594b0e9e8940495e95f33'/><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>Mark Brown &lt;broonie@kernel.org&gt;</td><td class='right'>2016-11-15 15:01:09 +0000</td></tr>
<tr><th>committer</th><td>Mark Brown &lt;broonie@kernel.org&gt;</td><td class='right'>2016-11-15 15:22:10 +0000</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/testing?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>53a20465e6b674eb6ce594b0e9e8940495e95f33</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/testing?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>4d4c29c7c68ab2a1b69e4bd3903949356d2467e8</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/testing?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>tools/testing</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/testing?id=1001354ca34179f3db924eb66672442a173147dc'>1001354ca34179f3db924eb66672442a173147dc</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/testing?id=53a20465e6b674eb6ce594b0e9e8940495e95f33&amp;id2=1001354ca34179f3db924eb66672442a173147dc'>diff</a>)</td></tr></table>
<div class='commit-subject'>regulator: pwm: Add missing quotes to DT example</div><div class='commit-msg'>Reported-by: Peter Rosin &lt;peda@axentia.se&gt;
Signed-off-by: Mark Brown &lt;broonie@kernel.org&gt;
Acked-by: Rob Herring &lt;robh@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>Diffstat</a> (limited to 'tools/testing')</div><table summary='diffstat' class='diffstat'>