Messages in this thread Patch in this message | | | Date | Mon, 29 Nov 2021 08:47:55 +0100 | Subject | Re: [patch 17/22] PCI/MSI: Split out !IRQDOMAIN code | From | Cédric Le Goater <> |
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On 11/27/21 02:19, Thomas Gleixner wrote: > 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"
I am getting a :
../drivers/pci/msi/legacy.c:7:10: fatal error: msi.h: No such file or directory 7 | #include "msi.h"
which seems to be fixed later.
C.
> + > +/* 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 >
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