[PATCH 15/16] tile/MSI: Use MSI controller framework to configure MSI/MSI-X irq
From: Yijing Wang <hidden>
Date: 2014-10-27 12:45:23
Also in:
linux-arm-kernel, linux-iommu, linux-mips, linux-pci, lkml, sparclinux
Subsystem:
the rest · Maintainer:
Linus Torvalds
Use MSI controller 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 <redacted> --- arch/tile/include/asm/pci.h | 2 ++ arch/tile/kernel/pci_gx.c | 18 ++++++++++++++++-- 2 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/arch/tile/include/asm/pci.h b/arch/tile/include/asm/pci.h
index dfedd7a..3ebd66b 100644
--- a/arch/tile/include/asm/pci.h
+++ b/arch/tile/include/asm/pci.h@@ -152,6 +152,7 @@ struct pci_controller { int pio_io_index; /* PIO region index for I/O space access */ #endif + struct msi_controller *msi_ctrl; /* * Mem-Map regions for all the memory controllers so that Linux can * map all of its physical memory space to the PCI bus.
@@ -179,6 +180,7 @@ struct pci_controller { int irq_intx_table[4]; }; +extern struct msi_controller tilegx_msi_ctrl; extern struct pci_controller pci_controllers[TILEGX_NUM_TRIO * TILEGX_TRIO_PCIES]; extern gxio_trio_context_t trio_contexts[TILEGX_NUM_TRIO]; extern int num_trio_shims;
diff --git a/arch/tile/kernel/pci_gx.c b/arch/tile/kernel/pci_gx.c
index e39f9c5..6bf5a24 100644
--- a/arch/tile/kernel/pci_gx.c
+++ b/arch/tile/kernel/pci_gx.c@@ -887,6 +887,7 @@ int __init pcibios_init(void) controller->mem_offset); pci_add_resource(&resources, &controller->io_space); controller->first_busno = next_busno; + controller->msi_ctrl = &tilegx_msi_ctrl; bus = pci_scan_root_bus(NULL, next_busno, controller->ops, controller, &resources); controller->root_bus = bus;
@@ -1485,7 +1486,15 @@ static struct irq_chip tilegx_msi_chip = { /* TBD: support set_affinity. */ }; -int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc) +struct msi_controller *pcibios_msi_controller(struct pci_bus *bus) +{ + struct pci_controller *controller = bus->sysdata; + + return controller->msi_ctrl; +} + +static int tile_setup_msi_irq(struct msi_controller *ctrl, + struct pci_dev *pdev, struct msi_desc *desc) { struct pci_controller *controller; gxio_trio_context_t *trio_context;
@@ -1604,7 +1613,12 @@ is_64_failure: return ret; } -void arch_teardown_msi_irq(unsigned int irq) +static void tile_teardown_msi_irq(struct msi_controller *ctrl, unsigned int irq) { irq_free_hwirq(irq); } + +struct msi_controller tilegx_msi_ctrl = { + .setup_irq = tile_setup_msi_irq, + .teardown_irq = tile_teardown_msi_irq, +};
--
1.7.1