[tip: irq/msi] PCI/MSI: Split out CONFIG_PCI_MSI independent part

tip-bot2 for Thomas Gleixner
2021-12-09T16:07:20Z

The following commit has been merged into the irq/msi branch of tip:

Commit-ID: 54324c2f3d728f451d9053fcc7859b26fc9cecb4
Gitweb: https://git.kernel.org/tip/54324c2f3d728f451d9053fcc7859b26fc9cecb4
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Mon, 06 Dec 2021 23:27:49 +01:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Thu, 09 Dec 2021 11:52:22 +01:00

PCI/MSI: Split out CONFIG_PCI_MSI independent part

These functions are required even when CONFIG_PCI_MSI is not set. Move them
to their own file.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20211206210224.710137730@linutronix.de

---
drivers/pci/msi/Makefile | 3 +-
drivers/pci/msi/msi.c | 39 +--------------------------------
drivers/pci/msi/pcidev_msi.c | 43 +++++++++++++++++++++++++++++++++++-
3 files changed, 45 insertions(+), 40 deletions(-)
create mode 100644 drivers/pci/msi/pcidev_msi.c

diff --git a/drivers/pci/msi/Makefile b/drivers/pci/msi/Makefile
index 79a6013..8ed69b3 100644
--- a/drivers/pci/msi/Makefile
+++ b/drivers/pci/msi/Makefile
@@ -1,4 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
#
# Makefile for the PCI/MSI
-obj-$(CONFIG_PCI) += msi.o
+obj-$(CONFIG_PCI) += pcidev_msi.o
+obj-$(CONFIG_PCI_MSI) += msi.o
diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c
index 00233b0..a32345d 100644
--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -18,8 +18,6 @@

#include "../pci.h"

-#ifdef CONFIG_PCI_MSI
-
static int pci_msi_enable = 1;
int pci_msi_ignore_mask;

@@ -1493,40 +1491,3 @@ bool pci_dev_has_special_msi_domain(struct pci_dev *pdev)
}

#endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */
-#endif /* CONFIG_PCI_MSI */
-
-void pci_msi_init(struct pci_dev *dev)
-{
- u16 ctrl;
-
- /*
- * Disable the MSI hardware to avoid screaming interrupts
- * during boot. This is the power on reset default so
- * usually this should be a noop.
- */
- dev->msi_cap = pci_find_capability(dev, PCI_CAP_ID_MSI);
- if (!dev->msi_cap)
- return;
-
- pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &ctrl);
- if (ctrl & PCI_MSI_FLAGS_ENABLE)
- pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS,
- ctrl & ~PCI_MSI_FLAGS_ENABLE);
-
- if (!(ctrl & PCI_MSI_FLAGS_64BIT))
- dev->no_64bit_msi = 1;
-}
-
-void pci_msix_init(struct pci_dev *dev)
-{
- u16 ctrl;
-
- dev->msix_cap = pci_find_capability(dev, PCI_CAP_ID_MSIX);
- if (!dev->msix_cap)
- return;
-
- pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &ctrl);
- if (ctrl & PCI_MSIX_FLAGS_ENABLE)
- pci_write_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS,
- ctrl & ~PCI_MSIX_FLAGS_ENABLE);
-}
diff --git a/drivers/pci/msi/pcidev_msi.c b/drivers/pci/msi/pcidev_msi.c
new file mode 100644
index 0000000..5520aff
--- /dev/null
+++ b/drivers/pci/msi/pcidev_msi.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MSI[X} related functions which are available unconditionally.
+ */
+#include "../pci.h"
+
+/*
+ * Disable the MSI[X] hardware to avoid screaming interrupts during boot.
+ * This is the power on reset default so usually this should be a noop.
+ */
+
+void pci_msi_init(struct pci_dev *dev)
+{
+ u16 ctrl;
+
+ dev->msi_cap = pci_find_capability(dev, PCI_CAP_ID_MSI);
+ if (!dev->msi_cap)
+ return;
+
+ pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &ctrl);
+ if (ctrl & PCI_MSI_FLAGS_ENABLE) {
+ pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS,
+ ctrl & ~PCI_MSI_FLAGS_ENABLE);
+ }
+
+ if (!(ctrl & PCI_MSI_FLAGS_64BIT))
+ dev->no_64bit_msi = 1;
+}
+
+void pci_msix_init(struct pci_dev *dev)
+{
+ u16 ctrl;
+
+ dev->msix_cap = pci_find_capability(dev, PCI_CAP_ID_MSIX);
+ if (!dev->msix_cap)
+ return;
+
+ pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &ctrl);
+ if (ctrl & PCI_MSIX_FLAGS_ENABLE) {
+ pci_write_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS,
+ ctrl & ~PCI_MSIX_FLAGS_ENABLE);
+ }
+}