This patch makes pci-xgene-msi driver ACPI-aware and provides MSI capability for X-Gene v1 PCIe controllers in ACPI boot mode.
Signed-off-by: Khuong Dinh <[email protected]> [Take over from Duc Dang] --- drivers/pci/host/pci-xgene-msi.c | 38 +++++++++++++++++++++++++++++++++++--- 1 files changed, 35 insertions(+), 3 deletions(-) diff --git a/drivers/pci/host/pci-xgene-msi.c b/drivers/pci/host/pci-xgene-msi.c index 1f42a20..d657248 100644 --- a/drivers/pci/host/pci-xgene-msi.c +++ b/drivers/pci/host/pci-xgene-msi.c @@ -4,6 +4,7 @@ * Copyright (c) 2014, Applied Micro Circuits Corporation * Author: Tanmay Inamdar <[email protected]> * Duc Dang <[email protected]> + * Khuong Dinh <[email protected]> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the @@ -24,6 +25,7 @@ #include <linux/pci.h> #include <linux/platform_device.h> #include <linux/of_pci.h> +#include <linux/acpi.h> #define MSI_IR0 0x000000 #define MSI_INT0 0x800000 @@ -39,7 +41,7 @@ struct xgene_msi_group { }; struct xgene_msi { - struct device_node *node; + struct fwnode_handle *fwnode; struct irq_domain *inner_domain; struct irq_domain *msi_domain; u64 msi_addr; @@ -249,6 +251,13 @@ static void xgene_irq_domain_free(struct irq_domain *domain, .free = xgene_irq_domain_free, }; +#ifdef CONFIG_ACPI +static struct fwnode_handle *xgene_msi_get_fwnode(struct device *dev) +{ + return xgene_msi_ctrl.fwnode; +} +#endif + static int xgene_allocate_domains(struct xgene_msi *msi) { msi->inner_domain = irq_domain_add_linear(NULL, NR_MSI_VEC, @@ -256,7 +265,7 @@ static int xgene_allocate_domains(struct xgene_msi *msi) if (!msi->inner_domain) return -ENOMEM; - msi->msi_domain = pci_msi_create_irq_domain(of_node_to_fwnode(msi->node), + msi->msi_domain = pci_msi_create_irq_domain(msi->fwnode, &xgene_msi_domain_info, msi->inner_domain); @@ -265,6 +274,9 @@ static int xgene_allocate_domains(struct xgene_msi *msi) return -ENOMEM; } +#ifdef CONFIG_ACPI + pci_msi_register_fwnode_provider(&xgene_msi_get_fwnode); +#endif return 0; } @@ -449,6 +461,14 @@ static int xgene_msi_hwirq_free(unsigned int cpu) {}, }; +#ifdef CONFIG_ACPI +static const struct acpi_device_id xgene_msi_acpi_ids[] = { + {"APMC0D0E", 0}, + { }, +}; +MODULE_DEVICE_TABLE(acpi, xgene_msi_acpi_ids); +#endif + static int xgene_msi_probe(struct platform_device *pdev) { struct resource *res; @@ -469,7 +489,18 @@ static int xgene_msi_probe(struct platform_device *pdev) goto error; } xgene_msi->msi_addr = res->start; - xgene_msi->node = pdev->dev.of_node; + + xgene_msi->fwnode = of_node_to_fwnode(pdev->dev.of_node); + if (!xgene_msi->fwnode) { + xgene_msi->fwnode = + irq_domain_alloc_fwnode((void *)xgene_msi->msi_addr); + if (!xgene_msi->fwnode) { + dev_err(&pdev->dev, "Failed to create fwnode\n"); + rc = ENOMEM; + goto error; + } + } + xgene_msi->num_cpus = num_possible_cpus(); rc = xgene_msi_init_allocator(xgene_msi); @@ -540,6 +571,7 @@ static int xgene_msi_probe(struct platform_device *pdev) .driver = { .name = "xgene-msi", .of_match_table = xgene_msi_match_table, + .acpi_match_table = ACPI_PTR(xgene_msi_acpi_ids), }, .probe = xgene_msi_probe, .remove = xgene_msi_remove, -- 1.7.1
