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SubjectRe: [PATCH 07/10] PCI: dwc: Add support to use non default msi_irq_chip
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Hi,

On 19/12/2018 12:42, Kishon Vijay Abraham I wrote:
> Platforms using Designware IP uses dw_pci_msi_bottom_irq_chip for
> configuring the MSI controller logic within the Designware IP. However
> certain platforms like Keystone (K2G) which uses Desingware IP has
> it's own MSI controller logic. For handling such platforms,
> the irqchip ops uses msi_irq_ack, msi_set_irq, msi_clear_irq callback
> functions.

Keystone also uses get_msi_addr and get_msi_data callbacks, do you want to
update the description to add those references as well?

>
> Add support to use different msi_irq_chip with default as
> dw_pci_msi_bottom_irq_chip. This is in preparation to get rid off
> msi_irq_ack, msi_set_irq, msi_clear_irq and other Keystone specific
> dw_pcie_host_ops.
>
> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
> ---
> drivers/pci/controller/dwc/pcie-designware-host.c | 5 ++++-
> drivers/pci/controller/dwc/pcie-designware.h | 1 +
> 2 files changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
> index 0fa9e8fdce66..db21bd11f153 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-host.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
> @@ -245,7 +245,7 @@ static int dw_pcie_irq_domain_alloc(struct irq_domain *domain,
>
> for (i = 0; i < nr_irqs; i++)
> irq_domain_set_info(domain, virq + i, bit + i,
> - &dw_pci_msi_bottom_irq_chip,
> + pp->msi_irq_chip,
> pp, handle_edge_irq,
> NULL, NULL);
>
> @@ -277,6 +277,9 @@ int dw_pcie_allocate_domains(struct pcie_port *pp)
> struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> struct fwnode_handle *fwnode = of_node_to_fwnode(pci->dev->of_node);
>
> + if (!pp->msi_irq_chip)
> + pp->msi_irq_chip = &dw_pci_msi_bottom_irq_chip;
> +
> pp->irq_domain = irq_domain_create_linear(fwnode, pp->num_vectors,
> &dw_pcie_msi_domain_ops, pp);
> if (!pp->irq_domain) {
> diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
> index 0989d880ac46..0873ee4084aa 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.h
> +++ b/drivers/pci/controller/dwc/pcie-designware.h
> @@ -168,6 +168,7 @@ struct pcie_port {
> struct irq_domain *irq_domain;
> struct irq_domain *msi_domain;
> dma_addr_t msi_data;
> + struct irq_chip *msi_irq_chip;
> u32 num_vectors;
> u32 irq_status[MAX_MSI_CTRLS];
> raw_spinlock_t lock;
>

Acked-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>

Regards,
Gustavo

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