x86/msi: Create named irq domains

Use the fwnode to create named irq domains so diagnosis works.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/20170619235444.299024560@linutronix.de

diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index d79dc2afa5363b6cf7aa14925207a08faf95b69a..9b18be76442236eab971cab86cbf366f9e1e134f 100644 (file)
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -136,13 +136,20 @@ static struct msi_domain_info pci_msi_domain_info = {
        .handler_name   = "edge",
 };
 
-void arch_init_msi_domain(struct irq_domain *parent)
+void __init arch_init_msi_domain(struct irq_domain *parent)
 {
+       struct fwnode_handle *fn;
+
        if (disable_apic)
                return;
 
-       msi_default_domain = pci_msi_create_irq_domain(NULL,
-                                       &pci_msi_domain_info, parent);
+       fn = irq_domain_alloc_named_fwnode("PCI-MSI");
+       if (fn) {
+               msi_default_domain =
+                       pci_msi_create_irq_domain(fn, &pci_msi_domain_info,
+                                                 parent);
+               irq_domain_free_fwnode(fn);
+       }
        if (!msi_default_domain)
                pr_warn("failed to initialize irqdomain for MSI/MSI-x.\n");
 }
@@ -230,13 +237,20 @@ static struct irq_domain *dmar_get_irq_domain(void)
 {
        static struct irq_domain *dmar_domain;
        static DEFINE_MUTEX(dmar_lock);
+       struct fwnode_handle *fn;
 
        mutex_lock(&dmar_lock);
-       if (dmar_domain == NULL)
-               dmar_domain = msi_create_irq_domain(NULL, &dmar_msi_domain_info,
+       if (dmar_domain)
+               goto out;
+
+       fn = irq_domain_alloc_named_fwnode("DMAR-MSI");
+       if (fn) {
+               dmar_domain = msi_create_irq_domain(fn, &dmar_msi_domain_info,
                                                    x86_vector_domain);
+               irq_domain_free_fwnode(fn);
+       }
+out:
        mutex_unlock(&dmar_lock);
-
        return dmar_domain;
 }
 
@@ -326,9 +340,10 @@ static struct msi_domain_info hpet_msi_domain_info = {
 
 struct irq_domain *hpet_create_irq_domain(int hpet_id)
 {
-       struct irq_domain *parent;
-       struct irq_alloc_info info;
        struct msi_domain_info *domain_info;
+       struct irq_domain *parent, *d;
+       struct irq_alloc_info info;
+       struct fwnode_handle *fn;
 
        if (x86_vector_domain == NULL)
                return NULL;
@@ -349,7 +364,16 @@ struct irq_domain *hpet_create_irq_domain(int hpet_id)
        else
                hpet_msi_controller.name = "IR-HPET-MSI";
 
-       return msi_create_irq_domain(NULL, domain_info, parent);
+       fn = irq_domain_alloc_named_id_fwnode(hpet_msi_controller.name,
+                                             hpet_id);
+       if (!fn) {
+               kfree(domain_info);
+               return NULL;
+       }
+
+       d = msi_create_irq_domain(fn, domain_info, parent);
+       irq_domain_free_fwnode(fn);
+       return d;
 }
 
 int hpet_assign_irq(struct irq_domain *domain, struct hpet_dev *dev,