linux-kernel - [PATCH 2/5] gic-its: Allow pci_requester

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Date:	Wed, 15 Jul 2015 09:54:42 -0700
From:	David Daney <ddaney.cavm@...il.com>
To:	linux-arm-kernel@...ts.infradead.org,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>
Cc:	linux-kernel@...r.kernel.org, Robert Richter <rrichter@...ium.com>,
	David Daney <david.daney@...ium.com>
Subject: [PATCH 2/5] gic-its: Allow pci_requester_id to be overridden.

From: David Daney <david.daney@...ium.com>

Signed-off-by: David Daney <david.daney@...ium.com>
---
 drivers/irqchip/irq-gic-v3-its.c   | 14 +++++++++++++-
 include/linux/irqchip/arm-gic-v3.h |  2 ++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 1b7e155..4580970 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -1189,11 +1189,23 @@ static int its_pci_msi_vec_count(struct pci_dev *pdev)
 	return max(msi, msix);
 }
 
+static u32 its_dflt_pci_requester_id(struct pci_dev *pdev, u16 alias)
+{
+	return alias;
+}
+
+static its_pci_requester_id_t its_pci_requester_id = its_dflt_pci_requester_id;
+void set_its_pci_requester_id(its_pci_requester_id_t fn)
+{
+	its_pci_requester_id = fn;
+}
+EXPORT_SYMBOL(set_its_pci_requester_id);
+
 static int its_get_pci_alias(struct pci_dev *pdev, u16 alias, void *data)
 {
 	struct its_pci_alias *dev_alias = data;
 
-	dev_alias->dev_id = alias;
+	dev_alias->dev_id = its_pci_requester_id(pdev, alias);
 	if (pdev != dev_alias->pdev)
 		dev_alias->count += its_pci_msi_vec_count(dev_alias->pdev);
 
diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h
index ffbc034..18e3757 100644
--- a/include/linux/irqchip/arm-gic-v3.h
+++ b/include/linux/irqchip/arm-gic-v3.h
@@ -389,6 +389,8 @@ int its_cpu_init(void);
 int its_init(struct device_node *node, struct rdists *rdists,
 	     struct irq_domain *domain);
 
+typedef u32 (*its_pci_requester_id_t)(struct pci_dev *, u16);
+void set_its_pci_requester_id(its_pci_requester_id_t fn);
 #endif
 
 #endif
-- 
1.9.1

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