1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2021 Western Digital Corporation or its affiliates. 4 * Copyright (C) 2022 Ventana Micro Systems Inc. 5 */ 6 #ifndef __LINUX_IRQCHIP_RISCV_IMSIC_H 7 #define __LINUX_IRQCHIP_RISCV_IMSIC_H 8 9 #include <linux/types.h> 10 #include <linux/bitops.h> 11 #include <linux/device.h> 12 #include <linux/fwnode.h> 13 14 #define IMSIC_MMIO_PAGE_SHIFT 12 15 #define IMSIC_MMIO_PAGE_SZ BIT(IMSIC_MMIO_PAGE_SHIFT) 16 #define IMSIC_MMIO_PAGE_LE 0x00 17 #define IMSIC_MMIO_PAGE_BE 0x04 18 19 #define IMSIC_MIN_ID 63 20 #define IMSIC_MAX_ID 2048 21 22 #define IMSIC_EIDELIVERY 0x70 23 24 #define IMSIC_EITHRESHOLD 0x72 25 26 #define IMSIC_EIP0 0x80 27 #define IMSIC_EIP63 0xbf 28 #define IMSIC_EIPx_BITS 32 29 30 #define IMSIC_EIE0 0xc0 31 #define IMSIC_EIE63 0xff 32 #define IMSIC_EIEx_BITS 32 33 34 #define IMSIC_FIRST IMSIC_EIDELIVERY 35 #define IMSIC_LAST IMSIC_EIE63 36 37 #define IMSIC_MMIO_SETIPNUM_LE 0x00 38 #define IMSIC_MMIO_SETIPNUM_BE 0x04 39 40 struct imsic_local_config { 41 phys_addr_t msi_pa; 42 void __iomem *msi_va; 43 }; 44 45 struct imsic_global_config { 46 /* 47 * MSI Target Address Scheme 48 * 49 * XLEN-1 12 0 50 * | | | 51 * ------------------------------------------------------------- 52 * |xxxxxx|Group Index|xxxxxxxxxxx|HART Index|Guest Index| 0 | 53 * ------------------------------------------------------------- 54 */ 55 56 /* Bits representing Guest index, HART index, and Group index */ 57 u32 guest_index_bits; 58 u32 hart_index_bits; 59 u32 group_index_bits; 60 u32 group_index_shift; 61 62 /* Global base address matching all target MSI addresses */ 63 phys_addr_t base_addr; 64 65 /* Number of interrupt identities */ 66 u32 nr_ids; 67 68 /* Number of guest interrupt identities */ 69 u32 nr_guest_ids; 70 71 /* Per-CPU IMSIC addresses */ 72 struct imsic_local_config __percpu *local; 73 }; 74 75 #ifdef CONFIG_RISCV_IMSIC 76 77 const struct imsic_global_config *imsic_get_global_config(void); 78 79 #else 80 imsic_get_global_config(void)81static inline const struct imsic_global_config *imsic_get_global_config(void) 82 { 83 return NULL; 84 } 85 86 #endif 87 88 #if IS_ENABLED(CONFIG_ACPI) && IS_ENABLED(CONFIG_RISCV_IMSIC) 89 int imsic_platform_acpi_probe(struct fwnode_handle *fwnode); 90 struct fwnode_handle *imsic_acpi_get_fwnode(struct device *dev); 91 #else imsic_acpi_get_fwnode(struct device * dev)92static inline struct fwnode_handle *imsic_acpi_get_fwnode(struct device *dev) { return NULL; } 93 #endif 94 95 #endif 96