1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2016, Semihalf
4  *	Author: Tomasz Nowicki <tn@semihalf.com>
5  */
6 
7 #ifndef __ACPI_IORT_H__
8 #define __ACPI_IORT_H__
9 
10 #include <linux/acpi.h>
11 #include <linux/fwnode.h>
12 #include <linux/irqdomain.h>
13 
14 #define IORT_IRQ_MASK(irq)		(irq & 0xffffffffULL)
15 #define IORT_IRQ_TRIGGER_MASK(irq)	((irq >> 32) & 0xffffffffULL)
16 
17 /*
18  * PMCG model identifiers for use in smmu pmu driver. Please note
19  * that this is purely for the use of software and has nothing to
20  * do with hardware or with IORT specification.
21  */
22 #define IORT_SMMU_V3_PMCG_GENERIC        0x00000000 /* Generic SMMUv3 PMCG */
23 #define IORT_SMMU_V3_PMCG_HISI_HIP08     0x00000001 /* HiSilicon HIP08 PMCG */
24 
25 int iort_register_domain_token(int trans_id, phys_addr_t base,
26 			       struct fwnode_handle *fw_node);
27 void iort_deregister_domain_token(int trans_id);
28 struct fwnode_handle *iort_find_domain_token(int trans_id);
29 #ifdef CONFIG_ACPI_IORT
30 void acpi_iort_init(void);
31 u32 iort_msi_map_id(struct device *dev, u32 id);
32 struct irq_domain *iort_get_device_domain(struct device *dev, u32 id,
33 					  enum irq_domain_bus_token bus_token);
34 void acpi_configure_pmsi_domain(struct device *dev);
35 int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id);
36 /* IOMMU interface */
37 int iort_dma_get_ranges(struct device *dev, u64 *size);
38 int iort_iommu_configure_id(struct device *dev, const u32 *id_in);
39 int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head);
40 phys_addr_t acpi_iort_dma_get_max_cpu_address(void);
41 #else
acpi_iort_init(void)42 static inline void acpi_iort_init(void) { }
iort_msi_map_id(struct device * dev,u32 id)43 static inline u32 iort_msi_map_id(struct device *dev, u32 id)
44 { return id; }
iort_get_device_domain(struct device * dev,u32 id,enum irq_domain_bus_token bus_token)45 static inline struct irq_domain *iort_get_device_domain(
46 	struct device *dev, u32 id, enum irq_domain_bus_token bus_token)
47 { return NULL; }
acpi_configure_pmsi_domain(struct device * dev)48 static inline void acpi_configure_pmsi_domain(struct device *dev) { }
49 /* IOMMU interface */
iort_dma_get_ranges(struct device * dev,u64 * size)50 static inline int iort_dma_get_ranges(struct device *dev, u64 *size)
51 { return -ENODEV; }
iort_iommu_configure_id(struct device * dev,const u32 * id_in)52 static inline int iort_iommu_configure_id(struct device *dev, const u32 *id_in)
53 { return -ENODEV; }
54 static inline
iort_iommu_msi_get_resv_regions(struct device * dev,struct list_head * head)55 int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
56 { return 0; }
57 
acpi_iort_dma_get_max_cpu_address(void)58 static inline phys_addr_t acpi_iort_dma_get_max_cpu_address(void)
59 { return PHYS_ADDR_MAX; }
60 #endif
61 
62 #endif /* __ACPI_IORT_H__ */
63