| Message ID | 1413342435-7876-25-git-send-email-wangyijing@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Wed, Oct 15, 2014 at 11:07:12AM +0800, Yijing Wang wrote: > Use MSI chip framework instead of arch MSI functions to configure > MSI/MSI-X irq. So we can manage MSI/MSI-X irq in a unified framework. This needs slightly more detail. You're using the MSI chip framework "instead of arch MSI functions". Well, there are still arch-specific functions, i.e., arch_ia64_setup_msi_irq() and arch_ia64_teardown_msi_irq(). We used to have arch_setup_msi_irq() which had a weak default implementation, and a strong arch-specific implementation here, and you're replacing that model with the new "msi-ops" model. I don't know how you want to write that, but it's not that you're getting rid of the arch-specific code; you're keeping arch-specific code but structuring it differently. > Signed-off-by: Yijing Wang <wangyijing@huawei.com> > --- > arch/ia64/include/asm/pci.h | 10 ++++++++++ > arch/ia64/kernel/msi_ia64.c | 14 ++++++++++---- > arch/ia64/pci/pci.c | 1 + > 3 files changed, 21 insertions(+), 4 deletions(-) > > diff --git a/arch/ia64/include/asm/pci.h b/arch/ia64/include/asm/pci.h > index 52af5ed..907dcba 100644 > --- a/arch/ia64/include/asm/pci.h > +++ b/arch/ia64/include/asm/pci.h > @@ -94,6 +94,7 @@ struct pci_controller { > int segment; > int node; /* nearest node with memory or NUMA_NO_NODE for global allocation */ > > + struct msi_chip *msi_chip; > void *platform_data; > }; > > @@ -101,6 +102,15 @@ struct pci_controller { > #define PCI_CONTROLLER(busdev) ((struct pci_controller *) busdev->sysdata) > #define pci_domain_nr(busdev) (PCI_CONTROLLER(busdev)->segment) > > +extern struct msi_chip chip; Please make this name more descriptive. "chip" is way too generic for a global name. > +static inline struct msi_chip *pci_msi_chip(struct pci_bus *bus) > +{ > + struct pci_controller *ctrl = bus->sysdata; > + > + return ctrl->msi_chip; > +} > + > extern struct pci_ops pci_root_ops; > > static inline int pci_proc_domain(struct pci_bus *bus) > diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c > index 8c3730c..401fc98 100644 > --- a/arch/ia64/kernel/msi_ia64.c > +++ b/arch/ia64/kernel/msi_ia64.c > @@ -112,15 +112,16 @@ static struct irq_chip ia64_msi_chip = { > }; > > > -int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc) > +static int arch_ia64_setup_msi_irq(struct msi_chip *chip, > + struct pci_dev *dev, struct msi_desc *desc) > { > if (platform_setup_msi_irq) > - return platform_setup_msi_irq(pdev, desc); > + return platform_setup_msi_irq(dev, desc); > > - return ia64_setup_msi_irq(pdev, desc); > + return ia64_setup_msi_irq(dev, desc); Please don't make gratuitous changes ("pdev" -> "dev") at the same time, especially since the rest of the file still uses "pdev". > } > > -void arch_teardown_msi_irq(unsigned int irq) > +static void arch_ia64_teardown_msi_irq(struct msi_chip *chip, unsigned int irq) > { > if (platform_teardown_msi_irq) > return platform_teardown_msi_irq(irq); > @@ -128,6 +129,11 @@ void arch_teardown_msi_irq(unsigned int irq) > return ia64_teardown_msi_irq(irq); > } > > +struct msi_chip chip = { > + .setup_irq = arch_ia64_setup_msi_irq, > + .teardown_irq = arch_ia64_teardown_msi_irq, > +}; > + > #ifdef CONFIG_INTEL_IOMMU > #ifdef CONFIG_SMP > static int dmar_msi_set_affinity(struct irq_data *data, > diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c > index 291a582..299b67d 100644 > --- a/arch/ia64/pci/pci.c > +++ b/arch/ia64/pci/pci.c > @@ -437,6 +437,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root) > > controller->companion = device; > controller->node = acpi_get_node(device->handle); > + controller->msi_chip = &chip; > > info = kzalloc(sizeof(*info), GFP_KERNEL); > if (!info) { > -- > 1.7.1 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
On 2014/10/23 7:53, Bjorn Helgaas wrote: > On Wed, Oct 15, 2014 at 11:07:12AM +0800, Yijing Wang wrote: >> Use MSI chip framework instead of arch MSI functions to configure >> MSI/MSI-X irq. So we can manage MSI/MSI-X irq in a unified framework. > > This needs slightly more detail. You're using the MSI chip framework > "instead of arch MSI functions". Well, there are still arch-specific > functions, i.e., arch_ia64_setup_msi_irq() and > arch_ia64_teardown_msi_irq(). > > We used to have arch_setup_msi_irq() which had a weak default > implementation, and a strong arch-specific implementation here, and you're > replacing that model with the new "msi-ops" model. I don't know how you > want to write that, but it's not that you're getting rid of the > arch-specific code; you're keeping arch-specific code but structuring it > differently. Hm, I will rename the msi-ops functions. > >> Signed-off-by: Yijing Wang <wangyijing@huawei.com> >> --- >> arch/ia64/include/asm/pci.h | 10 ++++++++++ >> arch/ia64/kernel/msi_ia64.c | 14 ++++++++++---- >> arch/ia64/pci/pci.c | 1 + >> 3 files changed, 21 insertions(+), 4 deletions(-) >> >> diff --git a/arch/ia64/include/asm/pci.h b/arch/ia64/include/asm/pci.h >> index 52af5ed..907dcba 100644 >> --- a/arch/ia64/include/asm/pci.h >> +++ b/arch/ia64/include/asm/pci.h >> @@ -94,6 +94,7 @@ struct pci_controller { >> int segment; >> int node; /* nearest node with memory or NUMA_NO_NODE for global allocation */ >> >> + struct msi_chip *msi_chip; >> void *platform_data; >> }; >> >> @@ -101,6 +102,15 @@ struct pci_controller { >> #define PCI_CONTROLLER(busdev) ((struct pci_controller *) busdev->sysdata) >> #define pci_domain_nr(busdev) (PCI_CONTROLLER(busdev)->segment) >> >> +extern struct msi_chip chip; > > Please make this name more descriptive. "chip" is way too generic for a > global name. OK, what about rename it to ia64_msi_chip, and rename the original static irq_chip ia64_msi_chip to static irq_chip msi_chip like in x86. > >> +static inline struct msi_chip *pci_msi_chip(struct pci_bus *bus) >> +{ >> + struct pci_controller *ctrl = bus->sysdata; >> + >> + return ctrl->msi_chip; >> +} >> + >> extern struct pci_ops pci_root_ops; >> >> static inline int pci_proc_domain(struct pci_bus *bus) >> diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c >> index 8c3730c..401fc98 100644 >> --- a/arch/ia64/kernel/msi_ia64.c >> +++ b/arch/ia64/kernel/msi_ia64.c >> @@ -112,15 +112,16 @@ static struct irq_chip ia64_msi_chip = { >> }; >> >> >> -int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc) >> +static int arch_ia64_setup_msi_irq(struct msi_chip *chip, >> + struct pci_dev *dev, struct msi_desc *desc) >> { >> if (platform_setup_msi_irq) >> - return platform_setup_msi_irq(pdev, desc); >> + return platform_setup_msi_irq(dev, desc); >> >> - return ia64_setup_msi_irq(pdev, desc); >> + return ia64_setup_msi_irq(dev, desc); > > Please don't make gratuitous changes ("pdev" -> "dev") at the same time, > especially since the rest of the file still uses "pdev". OK. > >> } >> >> -void arch_teardown_msi_irq(unsigned int irq) >> +static void arch_ia64_teardown_msi_irq(struct msi_chip *chip, unsigned int irq) >> { >> if (platform_teardown_msi_irq) >> return platform_teardown_msi_irq(irq); >> @@ -128,6 +129,11 @@ void arch_teardown_msi_irq(unsigned int irq) >> return ia64_teardown_msi_irq(irq); >> } >> >> +struct msi_chip chip = { >> + .setup_irq = arch_ia64_setup_msi_irq, >> + .teardown_irq = arch_ia64_teardown_msi_irq, >> +}; >> + >> #ifdef CONFIG_INTEL_IOMMU >> #ifdef CONFIG_SMP >> static int dmar_msi_set_affinity(struct irq_data *data, >> diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c >> index 291a582..299b67d 100644 >> --- a/arch/ia64/pci/pci.c >> +++ b/arch/ia64/pci/pci.c >> @@ -437,6 +437,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root) >> >> controller->companion = device; >> controller->node = acpi_get_node(device->handle); >> + controller->msi_chip = &chip; >> >> info = kzalloc(sizeof(*info), GFP_KERNEL); >> if (!info) { >> -- >> 1.7.1 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> Please read the FAQ at http://www.tux.org/lkml/ > > . >
diff --git a/arch/ia64/include/asm/pci.h b/arch/ia64/include/asm/pci.h index 52af5ed..907dcba 100644 --- a/arch/ia64/include/asm/pci.h +++ b/arch/ia64/include/asm/pci.h @@ -94,6 +94,7 @@ struct pci_controller { int segment; int node; /* nearest node with memory or NUMA_NO_NODE for global allocation */ + struct msi_chip *msi_chip; void *platform_data; }; @@ -101,6 +102,15 @@ struct pci_controller { #define PCI_CONTROLLER(busdev) ((struct pci_controller *) busdev->sysdata) #define pci_domain_nr(busdev) (PCI_CONTROLLER(busdev)->segment) +extern struct msi_chip chip; + +static inline struct msi_chip *pci_msi_chip(struct pci_bus *bus) +{ + struct pci_controller *ctrl = bus->sysdata; + + return ctrl->msi_chip; +} + extern struct pci_ops pci_root_ops; static inline int pci_proc_domain(struct pci_bus *bus) diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c index 8c3730c..401fc98 100644 --- a/arch/ia64/kernel/msi_ia64.c +++ b/arch/ia64/kernel/msi_ia64.c @@ -112,15 +112,16 @@ static struct irq_chip ia64_msi_chip = { }; -int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc) +static int arch_ia64_setup_msi_irq(struct msi_chip *chip, + struct pci_dev *dev, struct msi_desc *desc) { if (platform_setup_msi_irq) - return platform_setup_msi_irq(pdev, desc); + return platform_setup_msi_irq(dev, desc); - return ia64_setup_msi_irq(pdev, desc); + return ia64_setup_msi_irq(dev, desc); } -void arch_teardown_msi_irq(unsigned int irq) +static void arch_ia64_teardown_msi_irq(struct msi_chip *chip, unsigned int irq) { if (platform_teardown_msi_irq) return platform_teardown_msi_irq(irq); @@ -128,6 +129,11 @@ void arch_teardown_msi_irq(unsigned int irq) return ia64_teardown_msi_irq(irq); } +struct msi_chip chip = { + .setup_irq = arch_ia64_setup_msi_irq, + .teardown_irq = arch_ia64_teardown_msi_irq, +}; + #ifdef CONFIG_INTEL_IOMMU #ifdef CONFIG_SMP static int dmar_msi_set_affinity(struct irq_data *data, diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c index 291a582..299b67d 100644 --- a/arch/ia64/pci/pci.c +++ b/arch/ia64/pci/pci.c @@ -437,6 +437,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root) controller->companion = device; controller->node = acpi_get_node(device->handle); + controller->msi_chip = &chip; info = kzalloc(sizeof(*info), GFP_KERNEL); if (!info) {
Use MSI chip framework instead of arch MSI functions to configure MSI/MSI-X irq. So we can manage MSI/MSI-X irq in a unified framework. Signed-off-by: Yijing Wang <wangyijing@huawei.com> --- arch/ia64/include/asm/pci.h | 10 ++++++++++ arch/ia64/kernel/msi_ia64.c | 14 ++++++++++---- arch/ia64/pci/pci.c | 1 + 3 files changed, 21 insertions(+), 4 deletions(-)