diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2021-07-29 23:51:56 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2021-08-10 11:03:30 +0200 |
| commit | 7327cefebb85d440fa6a589fdf53979d55b29a5a (patch) | |
| tree | 925c895a9ce18a00ce916524e378f8b2027d743b /drivers/pci/msi.c | |
| parent | b296ababcc4bbf8efbb603d3aec6024a78662c1b (diff) | |
PCI/MSI: Cleanup msi_mask()
msi_mask() is calculating the possible mask bits for MSI per vector
masking.
Rename it to msi_multi_mask() and hand the MSI descriptor pointer into it
to simplify the call sites.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210729222543.203905260@linutronix.de
Diffstat (limited to 'drivers/pci/msi.c')
| -rw-r--r-- | drivers/pci/msi.c | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 1bde9eca8a78..2eab07b6bdc5 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -129,14 +129,6 @@ void __weak arch_restore_msi_irqs(struct pci_dev *dev) return default_restore_msi_irqs(dev); } -static inline __attribute_const__ u32 msi_mask(unsigned x) -{ - /* Don't shift by >= width of type */ - if (x >= 5) - return 0xffffffff; - return (1 << (1 << x)) - 1; -} - /* * 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 @@ -211,6 +203,14 @@ static void msi_set_mask_bit(struct irq_data *data, u32 flag) } } +static inline __attribute_const__ u32 msi_multi_mask(struct msi_desc *desc) +{ + /* Don't shift by >= width of type */ + if (desc->msi_attrib.multi_cap >= 5) + return 0xffffffff; + return (1 << (1 << desc->msi_attrib.multi_cap)) - 1; +} + /** * pci_msi_mask_irq - Generic IRQ chip callback to mask PCI/MSI interrupts * @data: pointer to irqdata associated to that interrupt @@ -419,8 +419,7 @@ static void __pci_restore_msi_state(struct pci_dev *dev) arch_restore_msi_irqs(dev); pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control); - msi_mask_irq(entry, msi_mask(entry->msi_attrib.multi_cap), - entry->msi_mask); + msi_mask_irq(entry, msi_multi_mask(entry), entry->msi_mask); control &= ~PCI_MSI_FLAGS_QSIZE; control |= (entry->msi_attrib.multiple << 4) | PCI_MSI_FLAGS_ENABLE; pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control); @@ -642,7 +641,7 @@ static int msi_capability_init(struct pci_dev *dev, int nvec, return -ENOMEM; /* All MSIs are unmasked by default; mask them all */ - mask = msi_mask(entry->msi_attrib.multi_cap); + mask = msi_multi_mask(entry); msi_mask_irq(entry, mask, mask); list_add_tail(&entry->list, dev_to_msi_list(&dev->dev)); @@ -938,7 +937,6 @@ EXPORT_SYMBOL(pci_msi_vec_count); static void pci_msi_shutdown(struct pci_dev *dev) { struct msi_desc *desc; - u32 mask; if (!pci_msi_enable || !dev || !dev->msi_enabled) return; @@ -951,8 +949,7 @@ static void pci_msi_shutdown(struct pci_dev *dev) dev->msi_enabled = 0; /* Return the device with MSI unmasked as initial states */ - mask = msi_mask(desc->msi_attrib.multi_cap); - msi_mask_irq(desc, mask, 0); + msi_mask_irq(desc, msi_multi_mask(desc), 0); /* Restore dev->irq to its default pin-assertion IRQ */ dev->irq = desc->msi_attrib.default_irq; |