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x86, msi: Introduce x86_msi.compose_msi_msg call-back

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This call-back points to the right function for initializing
the msi_msg structure. The old code for msi_msg generation
was split up into the irq-remapped and the default case.

The irq-remapped case just calls into the specific Intel or
AMD implementation when the device is behind an IOMMU.
Otherwise the default function is called.

Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Joerg Roedel
2012-09-26 12:44:49 +02:00
parent 2976fd8417
commit 7601384f91
5 changed files with 46 additions and 31 deletions
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9
drivers/iommu/irq_remapping.c
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@@ -150,6 +150,7 @@ static void __init irq_remapping_modify_x86_ops(void)
x86_io_apic_ops.setup_entry = setup_ioapic_remapped_entry;
x86_msi.setup_msi_irqs = irq_remapping_setup_msi_irqs;
x86_msi.setup_hpet_msi = setup_hpet_msi_remapped;
x86_msi.compose_msi_msg = compose_remapped_msi_msg;
}
static __init int setup_nointremap(char *str)
@@ -295,10 +296,12 @@ void compose_remapped_msi_msg(struct pci_dev *pdev,
unsigned int irq, unsigned int dest,
struct msi_msg *msg, u8 hpet_id)
{
if (!remap_ops || !remap_ops->compose_msi_msg)
return;
struct irq_cfg *cfg = irq_get_chip_data(irq);
remap_ops->compose_msi_msg(pdev, irq, dest, msg, hpet_id);
if (!irq_remapped(cfg))
native_compose_msi_msg(pdev, irq, dest, msg, hpet_id);
else if (remap_ops && remap_ops->compose_msi_msg)
remap_ops->compose_msi_msg(pdev, irq, dest, msg, hpet_id);
}
static int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec)