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irqchip/GICv2m: Add platform MSI support 

In order to support non-PCI MSI with GICv2m, add the minimal
required entry points for the MSI domain, which is actually almost
nothing (we just use the defaults provided by the core code).

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: <linux-arm-kernel@lists.infradead.org>
Cc: Yijing Wang <wangyijing@huawei.com>
Cc: Ma Jun <majun258@huawei.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Duc Dang <dhdang@apm.com>
Cc: Hanjun Guo <hanjun.guo@linaro.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1438091186-10244-18-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Marc Zyngier 2015-07-28 14:46:24 +01:00 committed by Thomas Gleixner
parent 5cedceb37c
commit ef50645aa3
1 changed files with 25 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/irqchip/irq-gic-v2m.c
View File

@ -50,7 +50,6 @@ struct v2m_data {
u32 spi_start; /* The SPI number that MSIs start */
u32 nr_spis; /* The number of SPIs for MSIs */
unsigned long *bm; /* MSI vector bitmap */
struct irq_domain *domain;
};
static void gicv2m_mask_msi_irq(struct irq_data *d)
@ -212,12 +211,25 @@ static bool is_msi_spi_valid(u32 base, u32 num)
return true;
}
static struct irq_chip gicv2m_pmsi_irq_chip = {
.name = "pMSI",
};
static struct msi_domain_ops gicv2m_pmsi_ops = {
};
static struct msi_domain_info gicv2m_pmsi_domain_info = {
.flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS),
.ops = &gicv2m_pmsi_ops,
.chip = &gicv2m_pmsi_irq_chip,
};
static int __init gicv2m_init_one(struct device_node *node,
struct irq_domain *parent)
{
int ret;
struct v2m_data *v2m;
struct irq_domain *inner_domain;
struct irq_domain *inner_domain, *pci_domain, *plat_domain;
v2m = kzalloc(sizeof(struct v2m_data), GFP_KERNEL);
if (!v2m) {
@ -270,10 +282,13 @@ static int __init gicv2m_init_one(struct device_node *node,
inner_domain->bus_token = DOMAIN_BUS_NEXUS;
inner_domain->parent = parent;
v2m->domain = pci_msi_create_irq_domain(node, &gicv2m_msi_domain_info,
pci_domain = pci_msi_create_irq_domain(node, &gicv2m_msi_domain_info,
inner_domain);
if (!v2m->domain) {
pr_err("Failed to create MSI domain\n");
plat_domain = platform_msi_create_irq_domain(node,
&gicv2m_pmsi_domain_info,
inner_domain);
if (!pci_domain || !plat_domain) {
pr_err("Failed to create MSI domains\n");
ret = -ENOMEM;
goto err_free_domains;
}
@ -287,8 +302,10 @@ static int __init gicv2m_init_one(struct device_node *node,
return 0;
err_free_domains:
if (v2m->domain)
irq_domain_remove(v2m->domain);
if (plat_domain)
irq_domain_remove(plat_domain);
if (pci_domain)
irq_domain_remove(pci_domain);
if (inner_domain)
irq_domain_remove(inner_domain);
err_free_bm: