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PCI/MSI: Move pci_msi_restore_state() to api.c

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To disentangle the maze in msi.c, all exported device-driver MSI APIs are
now to be grouped in one file, api.c.
    
Move pci_msi_enabled() and add kernel-doc for the function.

Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20221111122015.331584998@linutronix.de
This commit is contained in:
Ahmed S. Darwish 2022-11-11 14:55:03 +01:00 committed by Thomas Gleixner
parent 897a0b6aa8
commit 57127da98b
3 changed files with 19 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
drivers/pci/msi/api.c
View file

@ -308,6 +308,21 @@ void pci_free_irq_vectors(struct pci_dev *dev)
}
EXPORT_SYMBOL(pci_free_irq_vectors);
/**
* pci_restore_msi_state() - Restore cached MSI(-X) state on device
* @dev: the PCI device to operate on
*
* Write the Linux-cached MSI(-X) state back on device. This is
* typically useful upon system resume, or after an error-recovery PCI
* adapter reset.
*/
void pci_restore_msi_state(struct pci_dev *dev)
{
__pci_restore_msi_state(dev);
__pci_restore_msix_state(dev);
}
EXPORT_SYMBOL_GPL(pci_restore_msi_state);
/**
* pci_msi_enabled() - Are MSI(-X) interrupts enabled system-wide?
*

11
drivers/pci/msi/msi.c
View file

@ -199,7 +199,7 @@ bool __weak arch_restore_msi_irqs(struct pci_dev *dev)
return true;
}
static void __pci_restore_msi_state(struct pci_dev *dev)
void __pci_restore_msi_state(struct pci_dev *dev)
{
struct msi_desc *entry;
u16 control;
@ -231,7 +231,7 @@ static void pci_msix_clear_and_set_ctrl(struct pci_dev *dev, u16 clear, u16 set)
pci_write_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, ctrl);
}
static void __pci_restore_msix_state(struct pci_dev *dev)
void __pci_restore_msix_state(struct pci_dev *dev)
{
struct msi_desc *entry;
bool write_msg;
@ -257,13 +257,6 @@ static void __pci_restore_msix_state(struct pci_dev *dev)
pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_MASKALL, 0);
}
void pci_restore_msi_state(struct pci_dev *dev)
{
__pci_restore_msi_state(dev);
__pci_restore_msix_state(dev);
}
EXPORT_SYMBOL_GPL(pci_restore_msi_state);
static void pcim_msi_release(void *pcidev)
{
struct pci_dev *dev = pcidev;

2
drivers/pci/msi/msi.h
View file

@ -94,6 +94,8 @@ void pci_free_msi_irqs(struct pci_dev *dev);
int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec, struct irq_affinity *affd);
int __pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries, int minvec,
int maxvec, struct irq_affinity *affd, int flags);
void __pci_restore_msi_state(struct pci_dev *dev);
void __pci_restore_msix_state(struct pci_dev *dev);
/* Legacy (!IRQDOMAIN) fallbacks */