diff options
| -rw-r--r-- | MAINTAINERS | 2 | ||||
| -rw-r--r-- | drivers/soc/ti/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/soc/ti/Makefile | 1 | ||||
| -rw-r--r-- | drivers/soc/ti/ti_sci_inta_msi.c | 146 | ||||
| -rw-r--r-- | include/linux/irqdomain.h | 1 | ||||
| -rw-r--r-- | include/linux/msi.h | 10 | ||||
| -rw-r--r-- | include/linux/soc/ti/ti_sci_inta_msi.h | 23 |
7 files changed, 189 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 055467fb2019..96159e502e6c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15353,6 +15353,8 @@ F: Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt F: Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.txt F: drivers/irqchip/irq-ti-sci-intr.c F: drivers/irqchip/irq-ti-sci-inta.c +F: include/linux/soc/ti/ti_sci_inta_msi.h +F: drivers/soc/ti/ti_sci_inta_msi.c Texas Instruments ASoC drivers M: Peter Ujfalusi <peter.ujfalusi@ti.com> diff --git a/drivers/soc/ti/Kconfig b/drivers/soc/ti/Kconfig index be4570baad96..82f110fe4953 100644 --- a/drivers/soc/ti/Kconfig +++ b/drivers/soc/ti/Kconfig @@ -73,4 +73,10 @@ config TI_SCI_PM_DOMAINS called ti_sci_pm_domains. Note this is needed early in boot before rootfs may be available. +config TI_SCI_INTA_MSI_DOMAIN + bool + select GENERIC_MSI_IRQ_DOMAIN + help + Driver to enable Interrupt Aggregator specific MSI Domain. + endif # SOC_TI diff --git a/drivers/soc/ti/Makefile b/drivers/soc/ti/Makefile index a22edc0b258a..b3868d392d4f 100644 --- a/drivers/soc/ti/Makefile +++ b/drivers/soc/ti/Makefile @@ -8,3 +8,4 @@ obj-$(CONFIG_KEYSTONE_NAVIGATOR_DMA) += knav_dma.o obj-$(CONFIG_AMX3_PM) += pm33xx.o obj-$(CONFIG_WKUP_M3_IPC) += wkup_m3_ipc.o obj-$(CONFIG_TI_SCI_PM_DOMAINS) += ti_sci_pm_domains.o +obj-$(CONFIG_TI_SCI_INTA_MSI_DOMAIN) += ti_sci_inta_msi.o diff --git a/drivers/soc/ti/ti_sci_inta_msi.c b/drivers/soc/ti/ti_sci_inta_msi.c new file mode 100644 index 000000000000..0eb9462f609e --- /dev/null +++ b/drivers/soc/ti/ti_sci_inta_msi.c @@ -0,0 +1,146 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Texas Instruments' K3 Interrupt Aggregator MSI bus + * + * Copyright (C) 2018-2019 Texas Instruments Incorporated - http://www.ti.com/ + * Lokesh Vutla <lokeshvutla@ti.com> + */ + +#include <linux/irq.h> +#include <linux/irqdomain.h> +#include <linux/msi.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/of_irq.h> +#include <linux/soc/ti/ti_sci_inta_msi.h> +#include <linux/soc/ti/ti_sci_protocol.h> + +static void ti_sci_inta_msi_write_msg(struct irq_data *data, + struct msi_msg *msg) +{ + /* Nothing to do */ +} + +static void ti_sci_inta_msi_compose_msi_msg(struct irq_data *data, + struct msi_msg *msg) +{ + /* Nothing to do */ +} + +static void ti_sci_inta_msi_update_chip_ops(struct msi_domain_info *info) +{ + struct irq_chip *chip = info->chip; + + if (WARN_ON(!chip)) + return; + + chip->irq_request_resources = irq_chip_request_resources_parent; + chip->irq_release_resources = irq_chip_release_resources_parent; + chip->irq_compose_msi_msg = ti_sci_inta_msi_compose_msi_msg; + chip->irq_write_msi_msg = ti_sci_inta_msi_write_msg; + chip->irq_set_type = irq_chip_set_type_parent; + chip->irq_unmask = irq_chip_unmask_parent; + chip->irq_mask = irq_chip_mask_parent; + chip->irq_ack = irq_chip_ack_parent; +} + +struct irq_domain *ti_sci_inta_msi_create_irq_domain(struct fwnode_handle *fwnode, + struct msi_domain_info *info, + struct irq_domain *parent) +{ + struct irq_domain *domain; + + ti_sci_inta_msi_update_chip_ops(info); + + domain = msi_create_irq_domain(fwnode, info, parent); + if (domain) + irq_domain_update_bus_token(domain, DOMAIN_BUS_TI_SCI_INTA_MSI); + + return domain; +} +EXPORT_SYMBOL_GPL(ti_sci_inta_msi_create_irq_domain); + +static void ti_sci_inta_msi_free_descs(struct device *dev) +{ + struct msi_desc *desc, *tmp; + + list_for_each_entry_safe(desc, tmp, dev_to_msi_list(dev), list) { + list_del(&desc->list); + free_msi_entry(desc); + } +} + +static int ti_sci_inta_msi_alloc_descs(struct device *dev, + struct ti_sci_resource *res) +{ + struct msi_desc *msi_desc; + int set, i, count = 0; + + for (set = 0; set < res->sets; set++) { + for (i = 0; i < res->desc[set].num; i++) { + msi_desc = alloc_msi_entry(dev, 1, NULL); + if (!msi_desc) { + ti_sci_inta_msi_free_descs(dev); + return -ENOMEM; + } + + msi_desc->inta.dev_index = res->desc[set].start + i; + INIT_LIST_HEAD(&msi_desc->list); + list_add_tail(&msi_desc->list, dev_to_msi_list(dev)); + count++; + } + } + + return count; +} + +int ti_sci_inta_msi_domain_alloc_irqs(struct device *dev, + struct ti_sci_resource *res) +{ + struct platform_device *pdev = to_platform_device(dev); + struct irq_domain *msi_domain; + int ret, nvec; + + msi_domain = dev_get_msi_domain(dev); + if (!msi_domain) + return -EINVAL; + + if (pdev->id < 0) + return -ENODEV; + + nvec = ti_sci_inta_msi_alloc_descs(dev, res); + if (nvec <= 0) + return nvec; + + ret = msi_domain_alloc_irqs(msi_domain, dev, nvec); + if (ret) { + dev_err(dev, "Failed to allocate IRQs %d\n", ret); + goto cleanup; + } + + return 0; + +cleanup: + ti_sci_inta_msi_free_descs(&pdev->dev); + return ret; +} +EXPORT_SYMBOL_GPL(ti_sci_inta_msi_domain_alloc_irqs); + +void ti_sci_inta_msi_domain_free_irqs(struct device *dev) +{ + msi_domain_free_irqs(dev->msi_domain, dev); + ti_sci_inta_msi_free_descs(dev); +} +EXPORT_SYMBOL_GPL(ti_sci_inta_msi_domain_free_irqs); + +unsigned int ti_sci_inta_msi_get_virq(struct device *dev, u32 dev_index) +{ + struct msi_desc *desc; + + for_each_msi_entry(desc, dev) + if (desc->inta.dev_index == dev_index) + return desc->irq; + + return -ENODEV; +} +EXPORT_SYMBOL_GPL(ti_sci_inta_msi_get_virq); diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index 61706b430907..07ec8b390161 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -82,6 +82,7 @@ enum irq_domain_bus_token { DOMAIN_BUS_NEXUS, DOMAIN_BUS_IPI, DOMAIN_BUS_FSL_MC_MSI, + DOMAIN_BUS_TI_SCI_INTA_MSI, }; /** diff --git a/include/linux/msi.h b/include/linux/msi.h index 7e9b81c3b50d..7c28762851a3 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -48,6 +48,14 @@ struct fsl_mc_msi_desc { }; /** + * ti_sci_inta_msi_desc - TISCI based INTA specific msi descriptor data + * @dev_index: TISCI device index + */ +struct ti_sci_inta_msi_desc { + u16 dev_index; +}; + +/** * struct msi_desc - Descriptor structure for MSI based interrupts * @list: List head for management * @irq: The base interrupt number @@ -68,6 +76,7 @@ struct fsl_mc_msi_desc { * @mask_base: [PCI MSI-X] Mask register base address * @platform: [platform] Platform device specific msi descriptor data * @fsl_mc: [fsl-mc] FSL MC device specific msi descriptor data + * @inta: [INTA] TISCI based INTA specific msi descriptor data */ struct msi_desc { /* Shared device/bus type independent data */ @@ -106,6 +115,7 @@ struct msi_desc { */ struct platform_msi_desc platform; struct fsl_mc_msi_desc fsl_mc; + struct ti_sci_inta_msi_desc inta; }; }; diff --git a/include/linux/soc/ti/ti_sci_inta_msi.h b/include/linux/soc/ti/ti_sci_inta_msi.h new file mode 100644 index 000000000000..11fb5048f5f6 --- /dev/null +++ b/include/linux/soc/ti/ti_sci_inta_msi.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Texas Instruments' K3 TI SCI INTA MSI helper + * + * Copyright (C) 2018-2019 Texas Instruments Incorporated - http://www.ti.com/ + * Lokesh Vutla <lokeshvutla@ti.com> + */ + +#ifndef __INCLUDE_LINUX_TI_SCI_INTA_MSI_H +#define __INCLUDE_LINUX_TI_SCI_INTA_MSI_H + +#include <linux/msi.h> +#include <linux/soc/ti/ti_sci_protocol.h> + +struct irq_domain +*ti_sci_inta_msi_create_irq_domain(struct fwnode_handle *fwnode, + struct msi_domain_info *info, + struct irq_domain *parent); +int ti_sci_inta_msi_domain_alloc_irqs(struct device *dev, + struct ti_sci_resource *res); +unsigned int ti_sci_inta_msi_get_virq(struct device *dev, u32 index); +void ti_sci_inta_msi_domain_free_irqs(struct device *dev); +#endif /* __INCLUDE_LINUX_IRQCHIP_TI_SCI_INTA_H */ |