Contributors: 24
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Thomas Gleixner |
277 |
45.48% |
15 |
27.78% |
| Ahmed S. Darwish |
91 |
14.94% |
7 |
12.96% |
| Matthew Wilcox |
56 |
9.20% |
4 |
7.41% |
| Jiang Liu |
30 |
4.93% |
3 |
5.56% |
| Christoph Hellwig |
24 |
3.94% |
4 |
7.41% |
| Julien Grall |
21 |
3.45% |
1 |
1.85% |
| Michael Ellerman |
16 |
2.63% |
2 |
3.70% |
| Adrian Bunk |
15 |
2.46% |
1 |
1.85% |
| Andrew Morton |
14 |
2.30% |
1 |
1.85% |
| Hidetoshi Seto |
11 |
1.81% |
1 |
1.85% |
| Alexander Gordeev |
10 |
1.64% |
1 |
1.85% |
| Eric W. Biedermann |
8 |
1.31% |
1 |
1.85% |
| Logan Gunthorpe |
6 |
0.99% |
1 |
1.85% |
| Roland Dreier |
5 |
0.82% |
1 |
1.85% |
| Rafael J. Wysocki |
5 |
0.82% |
1 |
1.85% |
| Greg Kroah-Hartman |
5 |
0.82% |
2 |
3.70% |
| Mitch A Williams |
3 |
0.49% |
1 |
1.85% |
| Björn Helgaas |
3 |
0.49% |
1 |
1.85% |
| Michael S. Tsirkin |
2 |
0.33% |
1 |
1.85% |
| Arnd Bergmann |
2 |
0.33% |
1 |
1.85% |
| David Daney |
2 |
0.33% |
1 |
1.85% |
| Dexuan Cui |
1 |
0.16% |
1 |
1.85% |
| Sheng Yang |
1 |
0.16% |
1 |
1.85% |
| Kenji Kaneshige |
1 |
0.16% |
1 |
1.85% |
| Total |
609 |
|
54 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/pci.h>
#include <linux/msi.h>
#define msix_table_size(flags) ((flags & PCI_MSIX_FLAGS_QSIZE) + 1)
int pci_msi_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
void pci_msi_teardown_msi_irqs(struct pci_dev *dev);
/* Mask/unmask helpers */
void pci_msi_update_mask(struct msi_desc *desc, u32 clear, u32 set);
static inline void pci_msi_mask(struct msi_desc *desc, u32 mask)
{
pci_msi_update_mask(desc, 0, mask);
}
static inline void pci_msi_unmask(struct msi_desc *desc, u32 mask)
{
pci_msi_update_mask(desc, mask, 0);
}
static inline void __iomem *pci_msix_desc_addr(struct msi_desc *desc)
{
return desc->pci.mask_base + desc->msi_index * PCI_MSIX_ENTRY_SIZE;
}
/*
* This internal function does not flush PCI writes to the device. All
* users must ensure that they read from the device before either assuming
* that the device state is up to date, or returning out of this file.
* It does not affect the msi_desc::msix_ctrl cache either. Use with care!
*/
static inline void pci_msix_write_vector_ctrl(struct msi_desc *desc, u32 ctrl)
{
void __iomem *desc_addr = pci_msix_desc_addr(desc);
if (desc->pci.msi_attrib.can_mask)
writel(ctrl, desc_addr + PCI_MSIX_ENTRY_VECTOR_CTRL);
}
static inline void pci_msix_mask(struct msi_desc *desc)
{
desc->pci.msix_ctrl |= PCI_MSIX_ENTRY_CTRL_MASKBIT;
pci_msix_write_vector_ctrl(desc, desc->pci.msix_ctrl);
/* Flush write to device */
readl(desc->pci.mask_base);
}
static inline void pci_msix_unmask(struct msi_desc *desc)
{
desc->pci.msix_ctrl &= ~PCI_MSIX_ENTRY_CTRL_MASKBIT;
pci_msix_write_vector_ctrl(desc, desc->pci.msix_ctrl);
}
static inline void __pci_msi_mask_desc(struct msi_desc *desc, u32 mask)
{
if (desc->pci.msi_attrib.is_msix)
pci_msix_mask(desc);
else
pci_msi_mask(desc, mask);
}
static inline void __pci_msi_unmask_desc(struct msi_desc *desc, u32 mask)
{
if (desc->pci.msi_attrib.is_msix)
pci_msix_unmask(desc);
else
pci_msi_unmask(desc, mask);
}
/*
* PCI 2.3 does not specify mask bits for each MSI interrupt. Attempting to
* mask all MSI interrupts by clearing the MSI enable bit does not work
* reliably as devices without an INTx disable bit will then generate a
* level IRQ which will never be cleared.
*/
static inline __attribute_const__ u32 msi_multi_mask(struct msi_desc *desc)
{
/* Don't shift by >= width of type */
if (desc->pci.msi_attrib.multi_cap >= 5)
return 0xffffffff;
return (1 << (1 << desc->pci.msi_attrib.multi_cap)) - 1;
}
void msix_prepare_msi_desc(struct pci_dev *dev, struct msi_desc *desc);
/* 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);
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);
/* irq_domain related functionality */
enum support_mode {
ALLOW_LEGACY,
DENY_LEGACY,
};
bool pci_msi_domain_supports(struct pci_dev *dev, unsigned int feature_mask, enum support_mode mode);
bool pci_setup_msi_device_domain(struct pci_dev *pdev);
bool pci_setup_msix_device_domain(struct pci_dev *pdev, unsigned int hwsize);
/* Legacy (!IRQDOMAIN) fallbacks */
#ifdef CONFIG_PCI_MSI_ARCH_FALLBACKS
int pci_msi_legacy_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
void pci_msi_legacy_teardown_msi_irqs(struct pci_dev *dev);
#else
static inline int pci_msi_legacy_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
{
WARN_ON_ONCE(1);
return -ENODEV;
}
static inline void pci_msi_legacy_teardown_msi_irqs(struct pci_dev *dev)
{
WARN_ON_ONCE(1);
}
#endif