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Message-Id: <1592469493-1549-2-git-send-email-hayashi.kunihiko@socionext.com>
Date: Thu, 18 Jun 2020 17:38:08 +0900
From: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Jingoo Han <jingoohan1@...il.com>,
Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
Rob Herring <robh+dt@...nel.org>,
Masahiro Yamada <yamada.masahiro@...ionext.com>,
Marc Zyngier <maz@...nel.org>
Cc: linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Masami Hiramatsu <masami.hiramatsu@...aro.org>,
Jassi Brar <jaswinder.singh@...aro.org>,
Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
Subject: [PATCH v5 1/6] PCI: dwc: Add msi_host_isr() callback
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@...nel.org>
Cc: Jingoo Han <jingoohan1@...il.com>
Cc: Gustavo Pimentel <gustavo.pimentel@...opsys.com>
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
Acked-by: Gustavo Pimentel <gustavo.pimentel@...opsys.com>
---
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 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 {
--
2.7.4
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