Mailing List Archive

[patch 17/22] PCI/MSI: Split out !IRQDOMAIN code
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
[patch 17/22] PCI/MSI: Split out !IRQDOMAIN code [ In reply to ]
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
Re: [patch 17/22] PCI/MSI: Split out !IRQDOMAIN code [ In reply to ]
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
>
Re: [patch 17/22] PCI/MSI: Split out !IRQDOMAIN code [ In reply to ]
> +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++)

I guess this is 'desc' ?

Thanks,

C.

> + arch_teardown_msi_irq(desc->irq + i);
> + }
> + }
> +}