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05bff3419a
To probe an IWB in an ACPI based system it is required: - to implement the IORT functions handling the IWB IORT node and create functions to retrieve IWB firmware information - to augment the driver to match the DSDT ACPI "ARMH0003" device and retrieve the IWB wire and trigger mask from the GSI interrupt descriptor in the IWB msi_domain_ops.msi_translate() function Make the required driver changes to enable IWB probing in ACPI systems. The GICv5 GSI format requires special handling for IWB routed IRQs. Add IWB GSI detection to the top level driver gic_v5_get_gsi_domain_id() function so that the correct IRQ domain for a GSI can be detected by parsing the GSI and check whether it is an IWB-backed IRQ or not. Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org> Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Acked-by: Thomas Gleixner <tglx@kernel.org> Link: https://patch.msgid.link/20260115-gicv5-host-acpi-v3-6-c13a9a150388@kernel.org Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
80 lines
3.2 KiB
C
80 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2016, Semihalf
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* Author: Tomasz Nowicki <tn@semihalf.com>
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*/
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#ifndef __ACPI_IORT_H__
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#define __ACPI_IORT_H__
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#include <linux/acpi.h>
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#include <linux/fwnode.h>
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#include <linux/irqdomain.h>
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#define IORT_IRQ_MASK(irq) (irq & 0xffffffffULL)
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#define IORT_IRQ_TRIGGER_MASK(irq) ((irq >> 32) & 0xffffffffULL)
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/*
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* PMCG model identifiers for use in smmu pmu driver. Please note
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* that this is purely for the use of software and has nothing to
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* do with hardware or with IORT specification.
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*/
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#define IORT_SMMU_V3_PMCG_GENERIC 0x00000000 /* Generic SMMUv3 PMCG */
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#define IORT_SMMU_V3_PMCG_HISI_HIP08 0x00000001 /* HiSilicon HIP08 PMCG */
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#define IORT_SMMU_V3_PMCG_HISI_HIP09 0x00000002 /* HiSilicon HIP09 PMCG */
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int iort_register_domain_token(int trans_id, phys_addr_t base,
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struct fwnode_handle *fw_node);
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void iort_deregister_domain_token(int trans_id);
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struct fwnode_handle *iort_find_domain_token(int trans_id);
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struct fwnode_handle *iort_iwb_handle(u32 iwb_id);
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#ifdef CONFIG_ACPI_IORT
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u32 iort_msi_map_id(struct device *dev, u32 id);
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u32 iort_msi_xlate(struct device *dev, u32 id, struct fwnode_handle **node);
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int iort_its_translate_pa(struct fwnode_handle *node, phys_addr_t *base);
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struct irq_domain *iort_get_device_domain(struct device *dev, u32 id,
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enum irq_domain_bus_token bus_token);
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int iort_pmsi_get_msi_info(struct device *dev, u32 *dev_id, phys_addr_t *pa);
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void acpi_configure_pmsi_domain(struct device *dev);
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void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode,
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struct list_head *head);
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void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode,
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struct list_head *head);
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/* IOMMU interface */
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int iort_dma_get_ranges(struct device *dev, u64 *limit);
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int iort_iommu_configure_id(struct device *dev, const u32 *id_in);
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void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head);
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phys_addr_t acpi_iort_dma_get_max_cpu_address(void);
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#else
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static inline u32 iort_msi_map_id(struct device *dev, u32 id)
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{ return id; }
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static inline u32 iort_msi_xlate(struct device *dev, u32 id, struct fwnode_handle **node)
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{ return id; }
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static inline int iort_its_translate_pa(struct fwnode_handle *node, phys_addr_t *base)
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{ return -ENODEV; }
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static inline struct irq_domain *iort_get_device_domain(
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struct device *dev, u32 id, enum irq_domain_bus_token bus_token)
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{ return NULL; }
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static inline int iort_pmsi_get_msi_info(struct device *dev, u32 *dev_id, phys_addr_t *pa)
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{ return -ENODEV; }
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static inline void acpi_configure_pmsi_domain(struct device *dev) { }
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static inline
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void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode, struct list_head *head) { }
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static inline
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void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode, struct list_head *head) { }
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/* IOMMU interface */
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static inline int iort_dma_get_ranges(struct device *dev, u64 *limit)
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{ return -ENODEV; }
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static inline int iort_iommu_configure_id(struct device *dev, const u32 *id_in)
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{ return -ENODEV; }
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static inline
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void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head)
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{ }
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static inline phys_addr_t acpi_iort_dma_get_max_cpu_address(void)
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{ return PHYS_ADDR_MAX; }
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#endif
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#endif /* __ACPI_IORT_H__ */
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