[patch 17/22] PCI/MSI: Split out !IRQDOMAIN code

Thomas Gleixner
2021-11-27T01:21:53Z

Split out the non irqdomain code into its own file.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
drivers/pci/msi/Makefile | 5 ++--
drivers/pci/msi/legacy.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++
drivers/pci/msi/msi.c | 46 ------------------------------------------
3 files changed, 54 insertions(+), 48 deletions(-)

--- a/drivers/pci/msi/Makefile
+++ b/drivers/pci/msi/Makefile
@@ -1,5 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
#
# Makefile for the PCI/MSI
-obj-$(CONFIG_PCI) += pcidev_msi.o
-obj-$(CONFIG_PCI_MSI) += msi.o
+obj-$(CONFIG_PCI) += pcidev_msi.o
+obj-$(CONFIG_PCI_MSI) += msi.o
+obj-$(CONFIG_PCI_MSI_ARCH_FALLBACKS) += legacy.o
--- /dev/null
+++ b/drivers/pci/msi/legacy.c
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PCI Message Signaled Interrupt (MSI).
+ *
+ * Legacy architecture specific setup and teardown mechanism.
+ */
+#include "msi.h"
+
+/* Arch hooks */
+int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
+{
+ return -EINVAL;
+}
+
+void __weak arch_teardown_msi_irq(unsigned int irq)
+{
+}
+
+int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
+{
+ struct msi_desc *desc;
+ int ret;
+
+ /*
+ * If an architecture wants to support multiple MSI, it needs to
+ * override arch_setup_msi_irqs()
+ */
+ if (type == PCI_CAP_ID_MSI && nvec > 1)
+ return 1;
+
+ for_each_pci_msi_entry(desc, dev) {
+ ret = arch_setup_msi_irq(dev, desc);
+ if (ret)
+ return ret < 0 ? ret : -ENOSPC;
+ }
+
+ return 0;
+}
+
+void __weak arch_teardown_msi_irqs(struct pci_dev *dev)
+{
+ struct msi_desc *desc;
+ int i;
+
+ for_each_pci_msi_entry(desc, dev) {
+ if (desc->irq) {
+ for (i = 0; i < entry->nvec_used; i++)
+ arch_teardown_msi_irq(desc->irq + i);
+ }
+ }
+}
--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -50,52 +50,6 @@ static void pci_msi_teardown_msi_irqs(st
#define pci_msi_teardown_msi_irqs arch_teardown_msi_irqs
#endif

-#ifdef CONFIG_PCI_MSI_ARCH_FALLBACKS
-/* Arch hooks */
-int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
-{
- return -EINVAL;
-}
-
-void __weak arch_teardown_msi_irq(unsigned int irq)
-{
-}
-
-int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
-{
- struct msi_desc *entry;
- int ret;
-
- /*
- * If an architecture wants to support multiple MSI, it needs to
- * override arch_setup_msi_irqs()
- */
- if (type == PCI_CAP_ID_MSI && nvec > 1)
- return 1;
-
- for_each_pci_msi_entry(entry, dev) {
- ret = arch_setup_msi_irq(dev, entry);
- if (ret < 0)
- return ret;
- if (ret > 0)
- return -ENOSPC;
- }
-
- return 0;
-}
-
-void __weak arch_teardown_msi_irqs(struct pci_dev *dev)
-{
- int i;
- struct msi_desc *entry;
-
- for_each_pci_msi_entry(entry, dev)
- if (entry->irq)
- for (i = 0; i < entry->nvec_used; i++)
- arch_teardown_msi_irq(entry->irq + i);
-}
-#endif /* CONFIG_PCI_MSI_ARCH_FALLBACKS */
-
/*
* 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