[PATCH v3 11/27] PCI/MSI: Refactor struct msi_chip to make it become more common
flat view
STALE4373d
REVIEWED: 3 (3M)
From: Yijing Wang <hidden>
Date: 2014-10-15 02:33:32
Also in:
linux-arch, linux-arm-kernel, linux-iommu, linux-mips, linux-pci, linux-s390, lkml, sparclinux
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
Revision v3 of 4 in this series; 1 review trailer.
Revisions (4)
- v2 [diff vs current]
- v2 [diff vs current]
- v3 current
- v3
Now there are a lot of __weak arch functions in MSI code. These functions make MSI driver complex. Thierry introduced MSI chip framework to configure MSI/MSI-X irq in arm. Use MSI chip framework to refactor all other platform MSI code to eliminate weak arch MSI functions. This patch add .restore_irqs(), .teardown_irqs() and .setup_irqs() to make it become more common. Signed-off-by: Yijing Wang <redacted> Reviewed-by: Lucas Stach <l.stach@pengutronix.de> --- drivers/pci/msi.c | 15 +++++++++++++++ include/linux/msi.h | 4 ++++ 2 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 56e54ad..5cbd774 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c@@ -61,6 +61,11 @@ int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) { struct msi_desc *entry; int ret; + struct msi_chip *chip; + + chip = pci_msi_chip(dev->bus); + if (chip && chip->setup_irqs) + return chip->setup_irqs(chip, dev, nvec, type); /* * If an architecture wants to support multiple MSI, it needs to
@@ -103,6 +108,11 @@ void default_teardown_msi_irqs(struct pci_dev *dev) void __weak arch_teardown_msi_irqs(struct pci_dev *dev) { + struct msi_chip *chip = pci_msi_chip(dev->bus); + + if (chip && chip->teardown_irqs) + return chip->teardown_irqs(chip, dev); + return default_teardown_msi_irqs(dev); }
@@ -126,6 +136,11 @@ static void default_restore_msi_irq(struct pci_dev *dev, int irq) void __weak arch_restore_msi_irqs(struct pci_dev *dev) { + struct msi_chip *chip = pci_msi_chip(dev->bus); + + if (chip && chip->restore_irqs) + return chip->restore_irqs(chip, dev); + return default_restore_msi_irqs(dev); }
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 175aa21..eb5ae36 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h@@ -74,7 +74,11 @@ struct msi_chip { int (*setup_irq)(struct msi_chip *chip, struct pci_dev *dev, struct msi_desc *desc); + int (*setup_irqs)(struct msi_chip *chip, struct pci_dev *dev, + int nvec, int type); void (*teardown_irq)(struct msi_chip *chip, unsigned int irq); + void (*teardown_irqs)(struct msi_chip *chip, struct pci_dev *dev); + void (*restore_irqs)(struct msi_chip *chip, struct pci_dev *dev); }; #endif /* LINUX_MSI_H */
--
1.7.1