diff options
| author | Michael S. Tsirkin <mst@redhat.com> | 2015-05-07 17:52:21 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2015-05-07 17:52:21 +0300 |
| commit | 6a25f5e35ab742380742ebf2033f6d53518219db (patch) | |
| tree | 1dd947c5281467ad75450d7261c1d4fd2ec0f4b9 /drivers/pci/pci.h | |
| parent | 61b64abd399fa4b15ac649ad93b453d2a8569314 (diff) | |
| download | linux-6a25f5e35ab742380742ebf2033f6d53518219db.tar.xz | |
PCI/MSI: Export pci_msi_set_enable(), pci_msix_clear_and_set_ctrl()
Move pci_msi_set_enable() and pci_msix_clear_and_set_ctrl() to
drivers/pci/pci.h so they're available even when MSI isn't configured
into the kernel.
No functional change.
[bhelgaas: changelog, split into separate patch]
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Diffstat (limited to 'drivers/pci/pci.h')
| -rw-r--r-- | drivers/pci/pci.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 9bd762c237ab..6f04d1ea2bcb 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -146,6 +146,27 @@ static inline void pci_no_msi(void) { } static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { } #endif +static inline void pci_msi_set_enable(struct pci_dev *dev, int enable) +{ + u16 control; + + pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control); + control &= ~PCI_MSI_FLAGS_ENABLE; + if (enable) + control |= PCI_MSI_FLAGS_ENABLE; + pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control); +} + +static inline void pci_msix_clear_and_set_ctrl(struct pci_dev *dev, u16 clear, u16 set) +{ + u16 ctrl; + + pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &ctrl); + ctrl &= ~clear; + ctrl |= set; + pci_write_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, ctrl); +} + void pci_realloc_get_opt(char *); static inline int pci_no_d1d2(struct pci_dev *dev) |