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PCI/MSI: Move pci_msix_vec_count() to api.c
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_msix_vec_count() 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/20221111122015.099461602@linutronix.de
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059f778d66
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2 changed files with 20 additions and 20 deletions
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@ -59,6 +59,26 @@ void pci_disable_msi(struct pci_dev *dev)
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}
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}
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EXPORT_SYMBOL(pci_disable_msi);
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EXPORT_SYMBOL(pci_disable_msi);
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/**
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* pci_msix_vec_count() - Get number of MSI-X interrupt vectors on device
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* @dev: the PCI device to operate on
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*
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* Return: number of MSI-X interrupt vectors available on this device
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* (i.e., the device's MSI-X capability structure "table size"), -EINVAL
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* if the device is not MSI-X capable, other errnos otherwise.
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*/
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int pci_msix_vec_count(struct pci_dev *dev)
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{
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u16 control;
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if (!dev->msix_cap)
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return -EINVAL;
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pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &control);
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return msix_table_size(control);
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}
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EXPORT_SYMBOL(pci_msix_vec_count);
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/**
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/**
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* pci_enable_msix_range() - Enable MSI-X interrupt mode on device
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* pci_enable_msix_range() - Enable MSI-X interrupt mode on device
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* @dev: the PCI device to operate on
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* @dev: the PCI device to operate on
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@ -701,26 +701,6 @@ void pci_msi_shutdown(struct pci_dev *dev)
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pcibios_alloc_irq(dev);
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pcibios_alloc_irq(dev);
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}
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}
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/**
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* pci_msix_vec_count - return the number of device's MSI-X table entries
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* @dev: pointer to the pci_dev data structure of MSI-X device function
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* This function returns the number of device's MSI-X table entries and
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* therefore the number of MSI-X vectors device is capable of sending.
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* It returns a negative errno if the device is not capable of sending MSI-X
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* interrupts.
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**/
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int pci_msix_vec_count(struct pci_dev *dev)
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{
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u16 control;
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if (!dev->msix_cap)
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return -EINVAL;
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pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &control);
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return msix_table_size(control);
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}
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EXPORT_SYMBOL(pci_msix_vec_count);
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static int __pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries,
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static int __pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries,
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int nvec, struct irq_affinity *affd, int flags)
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int nvec, struct irq_affinity *affd, int flags)
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{
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{
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