Messages in this thread Patch in this message | | | From | Kunihiko Hayashi <> | Subject | [PATCH v3 1/6] PCI: dwc: Add msi_host_isr() callback | Date | Wed, 3 Jun 2020 17:54:36 +0900 |
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This adds msi_host_isr() callback function support to describe SoC-dependent service triggered by MSI.
For example, when AER interrupt is triggered by MSI, the callback function reads SoC-dependent registers and detects that the interrupt is from AER, and invoke AER interrupts related to MSI.
Cc: Marc Zyngier <maz@kernel.org> Cc: Jingoo Han <jingoohan1@gmail.com> Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> --- drivers/pci/controller/dwc/pcie-designware-host.c | 8 ++++---- drivers/pci/controller/dwc/pcie-designware.h | 1 + 2 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index 0a4a5aa..9b628a2 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -112,13 +112,13 @@ irqreturn_t dw_handle_msi_irq(struct pcie_port *pp) static void dw_chained_msi_isr(struct irq_desc *desc) { struct irq_chip *chip = irq_desc_get_chip(desc); - struct pcie_port *pp; + struct pcie_port *pp = irq_desc_get_handler_data(desc); - chained_irq_enter(chip, desc); + if (pp->ops->msi_host_isr) + pp->ops->msi_host_isr(pp); - pp = irq_desc_get_handler_data(desc); + chained_irq_enter(chip, desc); dw_handle_msi_irq(pp); - chained_irq_exit(chip, desc); } diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 656e00f..e741967 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -170,6 +170,7 @@ struct dw_pcie_host_ops { void (*scan_bus)(struct pcie_port *pp); void (*set_num_vectors)(struct pcie_port *pp); int (*msi_host_init)(struct pcie_port *pp); + void (*msi_host_isr)(struct pcie_port *pp); }; struct pcie_port { -- 2.7.4
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