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[PATCH v10 6/9] irqchip/gicv2m: register the MSI global doorbell

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Use the msi-doorbell API to register the global doorbell.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

---

v9 -> v10:
- introduce the registration concept in place of msi_doorbell_info
  callback

v8 -> v9:
- use global_doorbell instead of percpu_doorbells

v7 -> v8:
- gicv2m_msi_doorbell_info does not return a pointer to const
- remove spurious !v2m check
- add IOMMU_MMIO flag

v7: creation
---
 drivers/irqchip/irq-gic-v2m.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-gic-v2m.c b/drivers/irqchip/irq-gic-v2m.c
index ad0d296..11e039b 100644
--- a/drivers/irqchip/irq-gic-v2m.c
+++ b/drivers/irqchip/irq-gic-v2m.c
@@ -24,6 +24,8 @@
 #include <linux/of_pci.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
+#include <linux/iommu.h>
+#include <linux/msi-doorbell.h>
 
 /*
 * MSI_TYPER:
@@ -366,12 +368,18 @@ static int __init gicv2m_init_one(struct fwnode_handle *fwnode,
 		goto err_iounmap;
 	}
 
+	ret = msi_doorbell_register_global(v2m, v2m->res.start, sizeof(u32),
+					   IOMMU_WRITE | IOMMU_MMIO, false);
+	if (ret)
+		goto err_free_bm;
+
 	list_add_tail(&v2m->entry, &v2m_nodes);
 
 	pr_info("range%pR, SPI[%d:%d]\n", res,
 		v2m->spi_start, (v2m->spi_start + v2m->nr_spis - 1));
 	return 0;
-
+err_free_bm:
+	kfree(v2m->bm);
 err_iounmap:
 	iounmap(v2m->base);
 err_free_v2m:
-- 
1.9.1

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Thread

[PATCH v10 0/9] KVM PCIe/MSI passthrough on ARM/ARM64: kernel part 2/3: msi changes Eric Auger <eric.auger@redhat.com> - 2016-06-07 18:10 +0200
  [PATCH v10 5/9] genirq/msi-doorbell: msi_doorbell_safe Eric Auger <eric.auger@redhat.com> - 2016-06-07 18:10 +0200
  [PATCH v10 3/9] genirq/msi-doorbell: creation Eric Auger <eric.auger@redhat.com> - 2016-06-07 18:10 +0200
  [PATCH v10 2/9] genirq/msi: msi_compose wrapper Eric Auger <eric.auger@redhat.com> - 2016-06-07 18:10 +0200
  [PATCH v10 1/9] genirq/msi: export msi_get_domain_info Eric Auger <eric.auger@redhat.com> - 2016-06-07 18:10 +0200
  [PATCH v10 7/9] irqchip/gicv3-its: register the MSI global doorbell Eric Auger <eric.auger@redhat.com> - 2016-06-07 18:10 +0200
  [PATCH v10 6/9] irqchip/gicv2m: register the MSI global doorbell Eric Auger <eric.auger@redhat.com> - 2016-06-07 18:10 +0200
  [PATCH v10 8/9] genirq/msi: map/unmap the MSI doorbells on msi_domain_alloc/free_irqs Eric Auger <eric.auger@redhat.com> - 2016-06-07 18:10 +0200
  [PATCH v10 4/9] genirq/msi-doorbell: msi_doorbell_pages Eric Auger <eric.auger@redhat.com> - 2016-06-07 18:10 +0200
  [PATCH v10 9/9] genirq/msi: use the MSI doorbell's IOVA when requested Eric Auger <eric.auger@redhat.com> - 2016-06-07 18:10 +0200

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