[PATCH v6 2/6] PCI: dwc: Add msi_host_isr() callback
From: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Date: 2020-08-07 10:25:54
Also in:
linux-devicetree, linux-pci, lkml
Subsystem:
pci driver for synopsys designware, pci native host bridge and endpoint drivers, pci subsystem, the rest · Maintainers:
Jingoo Han, Manivannan Sadhasivam, Lorenzo Pieralisi, Krzysztof Wilczyński, Bjorn Helgaas, Linus Torvalds
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 <redacted> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Acked-by: Gustavo Pimentel <redacted> --- drivers/pci/controller/dwc/pcie-designware-host.c | 3 +++ drivers/pci/controller/dwc/pcie-designware.h | 1 + 2 files changed, 4 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 9dafecb..7948bf1 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c@@ -83,6 +83,9 @@ irqreturn_t dw_handle_msi_irq(struct pcie_port *pp) u32 status, num_ctrls; irqreturn_t ret = IRQ_NONE; + if (pp->ops->msi_host_isr) + pp->ops->msi_host_isr(pp); + num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL; for (i = 0; i < num_ctrls; i++) {
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index f911760..401cbd9 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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