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Commit 6ea3df69 authored by Bryant G. Ly's avatar Bryant G. Ly Committed by Michael Ellerman
Browse files

powerpc/eeh: Add EEH notify resume sysfs 



Introduce a method for notify resume to be called from sysfs. In this
patch one can now call notify resume from sysfs when is supported by
platform.

Signed-off-by: default avatarBryant G. Ly <bryantly@linux.vnet.ibm.com>
Signed-off-by: default avatarJuan J. Alvarez <jjalvare@linux.vnet.ibm.com>
Acked-by: default avatarRussell Currey <ruscur@russell.cc>
[mpe: Add NULL check, add empty versions to avoid #ifdefs]
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 67923cfc

arch/powerpc/kernel/eeh_sysfs.c

+62 −0
Original line number Diff line number Diff line
@@ -90,6 +90,65 @@ static ssize_t eeh_pe_state_store(struct device *dev, 


static DEVICE_ATTR_RW(eeh_pe_state);



#ifdef CONFIG_PCI_IOV

static ssize_t eeh_notify_resume_show(struct device *dev,

				      struct device_attribute *attr, char *buf)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);

	struct pci_dn *pdn = pci_get_pdn(pdev);



	if (!edev || !edev->pe)

		return -ENODEV;



	pdn = pci_get_pdn(pdev);

	return sprintf(buf, "%d\n", pdn->last_allow_rc);

}



static ssize_t eeh_notify_resume_store(struct device *dev,

				       struct device_attribute *attr,

				       const char *buf, size_t count)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);



	if (!edev || !edev->pe || !eeh_ops->notify_resume)

		return -ENODEV;



	if (eeh_ops->notify_resume(pci_get_pdn(pdev)))

		return -EIO;



	return count;

}

static DEVICE_ATTR_RW(eeh_notify_resume);



static int eeh_notify_resume_add(struct pci_dev *pdev)

{

	struct device_node *np;

	int rc = 0;



	np = pci_device_to_OF_node(pdev->is_physfn ? pdev : pdev->physfn);



	if (of_property_read_bool(np, "ibm,is-open-sriov-pf"))

		rc = device_create_file(&pdev->dev, &dev_attr_eeh_notify_resume);



	return rc;

}



static void eeh_notify_resume_remove(struct pci_dev *pdev)

{

	struct device_node *np;



	np = pci_device_to_OF_node(pdev->is_physfn ? pdev : pdev->physfn);



	if (of_property_read_bool(np, "ibm,is-open-sriov-pf"))

		device_remove_file(&pdev->dev, &dev_attr_eeh_notify_resume);

}

#else

static inline int eeh_notify_resume_add(struct pci_dev *pdev) { return 0; }

static inline void eeh_notify_resume_remove(struct pci_dev *pdev) { }

#endif /* CONFIG_PCI_IOV */



void eeh_sysfs_add_device(struct pci_dev *pdev)

{

	struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
@@ -104,6 +163,7 @@ void eeh_sysfs_add_device(struct pci_dev *pdev) 
	rc += device_create_file(&pdev->dev, &dev_attr_eeh_mode);

	rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);

	rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_state);

	rc += eeh_notify_resume_add(pdev);



	if (rc)

		pr_warn("EEH: Unable to create sysfs entries\n");
@@ -129,6 +189,8 @@ void eeh_sysfs_remove_device(struct pci_dev *pdev) 
	device_remove_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);

	device_remove_file(&pdev->dev, &dev_attr_eeh_pe_state);



	eeh_notify_resume_remove(pdev);



	if (edev)

		edev->mode &= ~EEH_DEV_SYSFS;

}