On Fri, Sep 28, 2012 at 02:24:00PM +0200, Joerg Roedel wrote:
> Add routines to setup interrupt remapping for MSI
> interrupts.
>
> Signed-off-by: Joerg Roedel <joerg.roe...@amd.com>
> ---
> drivers/iommu/amd_iommu.c | 74
> +++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 74 insertions(+)
>
> diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
> index 3df01b2..84efecd 100644
> --- a/drivers/iommu/amd_iommu.c
> +++ b/drivers/iommu/amd_iommu.c
> @@ -4126,4 +4126,78 @@ static int free_irq(int irq)
> return 0;
> }
>
> +static void compose_msi_msg(struct pci_dev *pdev,
> + unsigned int irq, unsigned int dest,
> + struct msi_msg *msg, u8 hpet_id)
> +{
> + struct irq_2_iommu *irte_info;
> + struct irq_cfg *cfg;
> + union irte irte;
> +
> + cfg = irq_get_chip_data(irq);
> + if (!cfg)
> + return;
> +
> + irte_info = &cfg->irq_2_iommu;
> +
> + irte.val = 0;
> + irte.fields.vector = cfg->vector;
> + irte.fields.int_type = apic->irq_delivery_mode;
> + irte.fields.destination = dest;
> + irte.fields.dm = apic->irq_dest_mode;
> + irte.fields.valid = 1;
> +
> + modify_irte(irte_info->sub_handle, irte_info->irte_index, irte);
> +
> + msg->address_hi = MSI_ADDR_BASE_HI;
> + msg->address_lo = MSI_ADDR_BASE_LO;
> + msg->data = irte_info->irte_index;
> +}
> +
> +static int msi_alloc_irq(struct pci_dev *pdev, int irq, int nvec)
> +{
> + struct irq_cfg *cfg;
> + int index;
> + u16 devid;
> +
> + if (!pdev)
> + return -EINVAL;
> +
> + cfg = irq_get_chip_data(irq);
> + if (!cfg)
> + return -EINVAL;
> +
> + devid = get_device_id(&pdev->dev);
> + index = alloc_irq_index(cfg, devid, nvec);
> +
> + return index < 0 ? MAX_IRQS_PER_TABLE : index;
> +}
> +
> +static int msi_setup_irq(struct pci_dev *pdev, unsigned int irq,
> + int index, int offset)
> +{
> + struct irq_2_iommu *irte_info;
> + struct irq_cfg *cfg;
> + u16 devid;
> +
> + if (!pdev)
> + return -EINVAL;
> +
> + cfg = irq_get_chip_data(irq);
> + if (!cfg)
> + return -EINVAL;
> +
> + if (index >= MAX_IRQS_PER_TABLE)
> + return 0;
Hmm? Not an error code?
> +
> + devid = get_device_id(&pdev->dev);
> + irte_info = &cfg->irq_2_iommu;
> +
> + irte_info->sub_handle = devid;
> + irte_info->irte_index = index + offset;
> + irte_info->iommu = (void *)cfg;
> +
> + return 0;
> +}
> +
> #endif
> --
> 1.7.9.5
>
>
> _______________________________________________
> iommu mailing list
> io...@lists.linux-foundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu
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