[v5,1/6] PCI: dwc: Add msi_host_isr() callback
diff mbox series

Message ID 1592469493-1549-2-git-send-email-hayashi.kunihiko@socionext.com
State New, archived
Headers show
  • PCI: uniphier: Add features for UniPhier PCIe host controller
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Commit Message

Kunihiko Hayashi June 18, 2020, 8:38 a.m. UTC
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>
Acked-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
 drivers/pci/controller/dwc/pcie-designware-host.c | 3 +++
 drivers/pci/controller/dwc/pcie-designware.h      | 1 +
 2 files changed, 4 insertions(+)

diff mbox series

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 0a4a5aa..026edb1 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 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 {