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From: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
To: Bjorn Helgaas <bhelgaas@google.com>,
	Rob Herring <robh@kernel.org>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Jingoo Han <jingoohan1@gmail.com>,
	Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
	Marc Zyngier <maz@kernel.org>
Cc: linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Masami Hiramatsu <mhiramat@linaro.org>,
	Jassi Brar <jaswinder.singh@linaro.org>,
	Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Subject: [PATCH v8 2/3] PCI: dwc: Add msi_host_isr() callback
Date: Wed, 28 Oct 2020 10:31:42 +0900
Message-ID: <1603848703-21099-3-git-send-email-hayashi.kunihiko@socionext.com> (raw)
In-Reply-To: <1603848703-21099-1-git-send-email-hayashi.kunihiko@socionext.com>

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>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 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 674f32d..45eea6f 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -61,6 +61,9 @@ irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
 	irqreturn_t ret = IRQ_NONE;
 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
 
+	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 9d2f511..2ce3133 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -176,6 +176,7 @@ struct dw_pcie_host_ops {
 	int (*host_init)(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


  parent reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-28  1:31 [PATCH v8 0/3] PCI: uniphier: Add PME/AER support for UniPhier PCIe host controller Kunihiko Hayashi
2020-10-28  1:31 ` [PATCH v8 1/3] PCI: portdrv: Add pcie_port_service_get_irq() function Kunihiko Hayashi
2020-11-24 23:25   ` Bjorn Helgaas
2020-10-28  1:31 ` Kunihiko Hayashi [this message]
2020-10-28  1:31 ` [PATCH v8 3/3] PCI: uniphier: Add misc interrupt handler to invoke PME and AER Kunihiko Hayashi
2020-11-24 23:20   ` Bjorn Helgaas
2020-11-25 10:23     ` Lorenzo Pieralisi
2020-11-27 12:02       ` Kunihiko Hayashi

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