Register the GIC V2M global doorbell. The registered information
are used to set up the KVM passthrough use case.
Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
---
v13 -> v14:
- use iommu_msi_doorbell_alloc/free
v12 -> v13:
- use new msi doorbell registration prototype
- remove iommu protection attributes
- add unregistration in teardown
v11 -> v12:
- use irq_get_msi_doorbell_info new name
- simplify error handling
v10 -> v11:
- use the new registration API and re-implement the msi_doorbell_info
ops
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 863e073..33acfe0 100644
--- a/drivers/irqchip/irq-gic-v2m.c
+++ b/drivers/irqchip/irq-gic-v2m.c
@@ -70,6 +70,7 @@ struct v2m_data {
u32 spi_offset; /* offset to be subtracted from SPI number */
unsigned long *bm; /* MSI vector bitmap */
u32 flags; /* v2m flags for specific implementation */
+ struct iommu_msi_doorbell_info *doorbell_info; /* MSI doorbell */
};
static void gicv2m_mask_msi_irq(struct irq_data *d)
@@ -254,6 +255,7 @@ static void gicv2m_teardown(void)
struct v2m_data *v2m, *tmp;
list_for_each_entry_safe(v2m, tmp, &v2m_nodes, entry) {
+ iommu_msi_doorbell_free(v2m->doorbell_info);
list_del(&v2m->entry);
kfree(v2m->bm);
iounmap(v2m->base);
@@ -370,12 +372,18 @@ static int __init gicv2m_init_one(struct fwnode_handle *fwnode,
goto err_iounmap;
}
+ v2m->doorbell_info = iommu_msi_doorbell_alloc(v2m->res.start,
+ sizeof(u32), false);
+ if (IS_ERR(v2m->doorbell_info))
+ 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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