| Thomas Gleixner | aa423ac | 2021-12-06 23:27:52 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | |
| 3 | #include <linux/pci.h> |
| 4 | #include <linux/msi.h> |
| 5 | |
| 6 | #define msix_table_size(flags) ((flags & PCI_MSIX_FLAGS_QSIZE) + 1) |
| 7 | |
| 8 | extern int pci_msi_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); |
| 9 | extern void pci_msi_teardown_msi_irqs(struct pci_dev *dev); |
| 10 | |
| 11 | #ifdef CONFIG_PCI_MSI_ARCH_FALLBACKS |
| 12 | extern int pci_msi_legacy_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); |
| 13 | extern void pci_msi_legacy_teardown_msi_irqs(struct pci_dev *dev); |
| 14 | #else |
| 15 | static inline int pci_msi_legacy_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) |
| 16 | { |
| 17 | WARN_ON_ONCE(1); |
| 18 | return -ENODEV; |
| 19 | } |
| 20 | |
| 21 | static inline void pci_msi_legacy_teardown_msi_irqs(struct pci_dev *dev) |
| 22 | { |
| 23 | WARN_ON_ONCE(1); |
| 24 | } |
| 25 | #endif |
| 26 | |
| 27 | /* |
| 28 | * PCI 2.3 does not specify mask bits for each MSI interrupt. Attempting to |
| 29 | * mask all MSI interrupts by clearing the MSI enable bit does not work |
| 30 | * reliably as devices without an INTx disable bit will then generate a |
| 31 | * level IRQ which will never be cleared. |
| 32 | */ |
| 33 | static inline __attribute_const__ u32 msi_multi_mask(struct msi_desc *desc) |
| 34 | { |
| 35 | /* Don't shift by >= width of type */ |
| 36 | if (desc->pci.msi_attrib.multi_cap >= 5) |
| 37 | return 0xffffffff; |
| 38 | return (1 << (1 << desc->pci.msi_attrib.multi_cap)) - 1; |
| 39 | } |
