lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <1449605945-10707-5-git-send-email-Suravee.Suthikulpanit@amd.com>
Date:	Tue, 8 Dec 2015 12:19:04 -0800
From:	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
To:	<marc.zyngier@....com>, <tglx@...utronix.de>,
	<jason@...edaemon.net>, <rjw@...ysocki.net>
CC:	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Will Deacon <will.deacon@....com>,
	Catalin Marinas <Catalin.Marinas@....com>,
	<hanjun.guo@...aro.org>, <tomasz.nowicki@...aro.org>,
	<graeme.gregory@...aro.org>, <dhdang@....com>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux-acpi@...r.kernel.org>,
	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
Subject: [PATCH v4 4/5] gicv2m: Refactor to prepare for ACPI support

This patch replaces the struct device_node with struct fwnode_handle
since this structure is common between DT and ACPI.

It also refactors gicv2m_init_one() to prepare for ACPI support.
There should be no functional changes.

Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
---
 drivers/irqchip/irq-gic-v2m.c | 57 +++++++++++++++++++++++++++----------------
 1 file changed, 36 insertions(+), 21 deletions(-)

diff --git a/drivers/irqchip/irq-gic-v2m.c b/drivers/irqchip/irq-gic-v2m.c
index 87f8d10..7e60f7e 100644
--- a/drivers/irqchip/irq-gic-v2m.c
+++ b/drivers/irqchip/irq-gic-v2m.c
@@ -55,7 +55,7 @@ static DEFINE_SPINLOCK(v2m_lock);
 
 struct v2m_data {
 	struct list_head entry;
-	struct device_node *node;
+	struct fwnode_handle *fwnode;
 	struct resource res;	/* GICv2m resource */
 	void __iomem *base;	/* GICv2m virt address */
 	u32 spi_start;		/* The SPI number that MSIs start */
@@ -254,7 +254,7 @@ static void gicv2m_teardown(void)
 		list_del(&v2m->entry);
 		kfree(v2m->bm);
 		iounmap(v2m->base);
-		of_node_put(v2m->node);
+		of_node_put(to_of_node(v2m->fwnode));
 		kfree(v2m);
 	}
 }
@@ -268,7 +268,7 @@ static int gicv2m_allocate_domains(struct irq_domain *parent)
 	if (!v2m)
 		return 0;
 
-	inner_domain = irq_domain_create_tree(of_node_to_fwnode(v2m->node),
+	inner_domain = irq_domain_create_tree(v2m->fwnode,
 					      &gicv2m_domain_ops, v2m);
 	if (!inner_domain) {
 		pr_err("Failed to create GICv2m domain\n");
@@ -277,10 +277,10 @@ static int gicv2m_allocate_domains(struct irq_domain *parent)
 
 	inner_domain->bus_token = DOMAIN_BUS_NEXUS;
 	inner_domain->parent = parent;
-	pci_domain = pci_msi_create_irq_domain(of_node_to_fwnode(v2m->node),
+	pci_domain = pci_msi_create_irq_domain(v2m->fwnode,
 					       &gicv2m_msi_domain_info,
 					       inner_domain);
-	plat_domain = platform_msi_create_irq_domain(of_node_to_fwnode(v2m->node),
+	plat_domain = platform_msi_create_irq_domain(v2m->fwnode,
 						     &gicv2m_pmsi_domain_info,
 						     inner_domain);
 	if (!pci_domain || !plat_domain) {
@@ -296,11 +296,13 @@ static int gicv2m_allocate_domains(struct irq_domain *parent)
 	return 0;
 }
 
-static int __init gicv2m_init_one(struct device_node *node,
-				  struct irq_domain *parent)
+static int __init gicv2m_init_one(struct fwnode_handle *fwnode,
+				  u32 spi_start, u32 nr_spis,
+				  struct resource *res)
 {
 	int ret;
 	struct v2m_data *v2m;
+	const char *name = NULL;
 
 	v2m = kzalloc(sizeof(struct v2m_data), GFP_KERNEL);
 	if (!v2m) {
@@ -309,13 +311,9 @@ static int __init gicv2m_init_one(struct device_node *node,
 	}
 
 	INIT_LIST_HEAD(&v2m->entry);
-	v2m->node = node;
+	v2m->fwnode = fwnode;
 
-	ret = of_address_to_resource(node, 0, &v2m->res);
-	if (ret) {
-		pr_err("Failed to allocate v2m resource.\n");
-		goto err_free_v2m;
-	}
+	memcpy(&v2m->res, res, sizeof(struct resource));
 
 	v2m->base = ioremap(v2m->res.start, resource_size(&v2m->res));
 	if (!v2m->base) {
@@ -324,10 +322,9 @@ static int __init gicv2m_init_one(struct device_node *node,
 		goto err_free_v2m;
 	}
 
-	if (!of_property_read_u32(node, "arm,msi-base-spi", &v2m->spi_start) &&
-	    !of_property_read_u32(node, "arm,msi-num-spis", &v2m->nr_spis)) {
-		pr_info("Overriding V2M MSI_TYPER (base:%u, num:%u)\n",
-			v2m->spi_start, v2m->nr_spis);
+	if (spi_start && nr_spis) {
+		v2m->spi_start = spi_start;
+		v2m->nr_spis = nr_spis;
 	} else {
 		u32 typer = readl_relaxed(v2m->base + V2M_MSI_TYPER);
 
@@ -359,10 +356,13 @@ static int __init gicv2m_init_one(struct device_node *node,
 	}
 
 	list_add_tail(&v2m->entry, &v2m_nodes);
-	pr_info("Node %s: range[%#lx:%#lx], SPI[%d:%d]\n", node->name,
-		(unsigned long)v2m->res.start, (unsigned long)v2m->res.end,
-		v2m->spi_start, (v2m->spi_start + v2m->nr_spis));
 
+	if (to_of_node(fwnode))
+		name = to_of_node(fwnode)->name;
+
+	pr_info("Frame %s: range[%#lx:%#lx], SPI[%d:%d]\n", name,
+		(unsigned long)res->start, (unsigned long)res->end,
+		v2m->spi_start, (v2m->spi_start + v2m->nr_spis));
 	return 0;
 
 err_iounmap:
@@ -384,10 +384,25 @@ int __init gicv2m_of_init(struct device_node *node, struct irq_domain *parent)
 
 	for (child = of_find_matching_node(node, gicv2m_device_id); child;
 	     child = of_find_matching_node(child, gicv2m_device_id)) {
+		u32 spi_start = 0, nr_spis = 0;
+		struct resource res;
+
 		if (!of_find_property(child, "msi-controller", NULL))
 			continue;
 
-		ret = gicv2m_init_one(child, parent);
+		ret = of_address_to_resource(child, 0, &res);
+		if (ret) {
+			pr_err("Failed to allocate v2m resource.\n");
+			break;
+		}
+
+		if (!of_property_read_u32(child, "arm,msi-base-spi",
+					  &spi_start) &&
+		    !of_property_read_u32(child, "arm,msi-num-spis", &nr_spis))
+			pr_info("DT overriding V2M MSI_TYPER (base:%u, num:%u)\n",
+				spi_start, nr_spis);
+
+		ret = gicv2m_init_one(&child->fwnode, spi_start, nr_spis, &res);
 		if (ret) {
 			of_node_put(node);
 			break;
-- 
2.1.0

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ