[PATCH v16 17/22] PCI: plda: Add event bitmap field to struct plda_pcie_rp

From: Minda Chen <minda.chen@starfivetech.com>
To: "Lorenzo Pieralisi" <lpieralisi@kernel.org>,
	"Conor Dooley" <conor@kernel.org>,
	"Krzysztof Wilczyński" <kw@linux.com>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Bjorn Helgaas" <bhelgaas@google.com>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Daire McNamara" <daire.mcnamara@microchip.com>,
	"Emil Renner Berthing" <emil.renner.berthing@canonical.com>,
	"Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-riscv@lists.infradead.org, linux-pci@vger.kernel.org,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Mason Huo <mason.huo@starfivetech.com>,
	Leyfoon Tan <leyfoon.tan@starfivetech.com>,
	Kevin Xie <kevin.xie@starfivetech.com>,
	Minda Chen <minda.chen@starfivetech.com>
Subject: [PATCH v16 17/22] PCI: plda: Add event bitmap field to struct plda_pcie_rp
Date: Thu, 28 Mar 2024 17:18:30 +0800	[thread overview]
Message-ID: <20240328091835.14797-18-minda.chen@starfivetech.com> (raw)
In-Reply-To: <20240328091835.14797-1-minda.chen@starfivetech.com>

PLDA DMA interrupts are not all implemented, The non-implemented
interrupts should be masked. So add a bitmap field to mask the non-
implemented interrupts.

Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
---
 drivers/pci/controller/plda/pcie-microchip-host.c | 1 +
 drivers/pci/controller/plda/pcie-plda-host.c      | 6 ++++--
 drivers/pci/controller/plda/pcie-plda.h           | 1 +
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index 105964306b71..48f60a04b740 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -636,6 +636,7 @@ static int mc_platform_init(struct pci_config_window *cfg)
 
 	port->plda.event_ops = &mc_event_ops;
 	port->plda.event_irq_chip = &mc_event_irq_chip;
+	port->plda.events_bitmap = GENMASK(NUM_EVENTS - 1, 0);
 
 	/* Address translation is up; safe to enable interrupts */
 	ret = plda_init_interrupts(pdev, &port->plda, &mc_event);
diff --git a/drivers/pci/controller/plda/pcie-plda-host.c b/drivers/pci/controller/plda/pcie-plda-host.c
index 98c51e594efe..a040e7e5492f 100644
--- a/drivers/pci/controller/plda/pcie-plda-host.c
+++ b/drivers/pci/controller/plda/pcie-plda-host.c
@@ -290,6 +290,7 @@ static void plda_handle_event(struct irq_desc *desc)
 
 	events = port->event_ops->get_events(port);
 
+	events &= port->events_bitmap;
 	for_each_set_bit(bit, &events, port->num_events)
 		generic_handle_domain_irq(port->event_domain, bit);
 
@@ -420,8 +421,9 @@ int plda_init_interrupts(struct platform_device *pdev,
 {
 	struct device *dev = &pdev->dev;
 	int irq;
-	int i, intx_irq, msi_irq, event_irq;
+	int intx_irq, msi_irq, event_irq;
 	int ret;
+	u32 i;
 
 	if (!port->event_ops)
 		port->event_ops = &plda_event_ops;
@@ -439,7 +441,7 @@ int plda_init_interrupts(struct platform_device *pdev,
 	if (irq < 0)
 		return -ENODEV;
 
-	for (i = 0; i < port->num_events; i++) {
+	for_each_set_bit(i, &port->events_bitmap, port->num_events) {
 		event_irq = irq_create_mapping(port->event_domain, i);
 		if (!event_irq) {
 			dev_err(dev, "failed to map hwirq %d\n", i);
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index eb9e6f304985..c3d8c141e44d 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -160,6 +160,7 @@ struct plda_pcie_rp {
 	const struct plda_event_ops *event_ops;
 	const struct irq_chip *event_irq_chip;
 	void __iomem *bridge_addr;
+	unsigned long events_bitmap;
 	int num_events;
 };
 
-- 
2.17.1


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