[PATCH v2 6/9] PCI: dwc: Add support to use non default msi_irq_chip
From: Kishon Vijay Abraham I <hidden>
Date: 2019-02-07 11:32:38
Also in:
linux-pci, lkml
Subsystem:
pci driver for synopsys designware, pci native host bridge and endpoint drivers, pci subsystem, the rest · Maintainers:
Jingoo Han, Manivannan Sadhasivam, Lorenzo Pieralisi, Krzysztof Wilczyński, Bjorn Helgaas, Linus Torvalds
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. 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. This will also help to get rid of get_msi_addr and get_msi_data ops. Signed-off-by: Kishon Vijay Abraham I <redacted> --- 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 721d60a5d9e4..042de09b0451 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 1f56e6ae34ff..95e0c3c93f48 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h@@ -176,6 +176,7 @@ 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;
--
2.17.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel