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authorMichael S. Tsirkin <mst@redhat.com>2015-05-07 17:52:21 +0300
committerBjorn Helgaas <bhelgaas@google.com>2015-05-07 17:52:21 +0300
commit6a25f5e35ab742380742ebf2033f6d53518219db (patch)
tree1dd947c5281467ad75450d7261c1d4fd2ec0f4b9 /drivers/pci/pci.h
parent61b64abd399fa4b15ac649ad93b453d2a8569314 (diff)
downloadlinux-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.h21
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)