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PCI/MSI: Move pci_msi_enabled() 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 make its kernel-doc comprehensive.

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/20221111122015.271447896@linutronix.de
This commit is contained in:
Ahmed S. Darwish 2022-11-11 14:55:01 +01:00 committed by Thomas Gleixner
parent be37b8428b
commit 897a0b6aa8
3 changed files with 16 additions and 13 deletions
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12
drivers/pci/msi/api.c
View file

@ -307,3 +307,15 @@ void pci_free_irq_vectors(struct pci_dev *dev)
pci_disable_msi(dev);
}
EXPORT_SYMBOL(pci_free_irq_vectors);
/**
* pci_msi_enabled() - Are MSI(-X) interrupts enabled system-wide?
*
* Return: true if MSI has not been globally disabled through ACPI FADT,
* PCI bridge quirks, or the "pci=nomsi" kernel command-line option.
*/
int pci_msi_enabled(void)
{
return pci_msi_enable;
}
EXPORT_SYMBOL(pci_msi_enabled);

14
drivers/pci/msi/msi.c
View file

@ -13,7 +13,7 @@
#include "../pci.h"
#include "msi.h"
static int pci_msi_enable = 1;
int pci_msi_enable = 1;
int pci_msi_ignore_mask;
void pci_msi_update_mask(struct msi_desc *desc, u32 clear, u32 set)
@ -864,15 +864,3 @@ void pci_no_msi(void)
{
pci_msi_enable = 0;
}
/**
* pci_msi_enabled - is MSI enabled?
*
* Returns true if MSI has not been disabled by the command-line option
* pci=nomsi.
**/
int pci_msi_enabled(void)
{
return pci_msi_enable;
}
EXPORT_SYMBOL(pci_msi_enabled);

3
drivers/pci/msi/msi.h
View file

@ -84,6 +84,9 @@ static inline __attribute_const__ u32 msi_multi_mask(struct msi_desc *desc)
return (1 << (1 << desc->pci.msi_attrib.multi_cap)) - 1;
}
/* Subsystem variables */
extern int pci_msi_enable;
/* MSI internal functions invoked from the public APIs */
void pci_msi_shutdown(struct pci_dev *dev);
void pci_msix_shutdown(struct pci_dev *dev);