1 /* SPDX-License-Identifier: GPL-2.0-only */ 1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* 2 /*
3 * Copyright (C) 2021 Western Digital Corporat 3 * Copyright (C) 2021 Western Digital Corporation or its affiliates.
4 * Copyright (C) 2022 Ventana Micro Systems In 4 * Copyright (C) 2022 Ventana Micro Systems Inc.
5 */ 5 */
6 #ifndef __LINUX_IRQCHIP_RISCV_IMSIC_H 6 #ifndef __LINUX_IRQCHIP_RISCV_IMSIC_H
7 #define __LINUX_IRQCHIP_RISCV_IMSIC_H 7 #define __LINUX_IRQCHIP_RISCV_IMSIC_H
8 8
9 #include <linux/types.h> 9 #include <linux/types.h>
10 #include <linux/bitops.h> 10 #include <linux/bitops.h>
11 #include <linux/device.h> 11 #include <linux/device.h>
12 #include <linux/fwnode.h> 12 #include <linux/fwnode.h>
13 #include <asm/csr.h> 13 #include <asm/csr.h>
14 14
15 #define IMSIC_MMIO_PAGE_SHIFT 12 15 #define IMSIC_MMIO_PAGE_SHIFT 12
16 #define IMSIC_MMIO_PAGE_SZ BIT(IM 16 #define IMSIC_MMIO_PAGE_SZ BIT(IMSIC_MMIO_PAGE_SHIFT)
17 #define IMSIC_MMIO_PAGE_LE 0x00 17 #define IMSIC_MMIO_PAGE_LE 0x00
18 #define IMSIC_MMIO_PAGE_BE 0x04 18 #define IMSIC_MMIO_PAGE_BE 0x04
19 19
20 #define IMSIC_MIN_ID 63 20 #define IMSIC_MIN_ID 63
21 #define IMSIC_MAX_ID 2048 21 #define IMSIC_MAX_ID 2048
22 22
23 #define IMSIC_EIDELIVERY 0x70 23 #define IMSIC_EIDELIVERY 0x70
24 24
25 #define IMSIC_EITHRESHOLD 0x72 25 #define IMSIC_EITHRESHOLD 0x72
26 26
27 #define IMSIC_EIP0 0x80 27 #define IMSIC_EIP0 0x80
28 #define IMSIC_EIP63 0xbf 28 #define IMSIC_EIP63 0xbf
29 #define IMSIC_EIPx_BITS 32 29 #define IMSIC_EIPx_BITS 32
30 30
31 #define IMSIC_EIE0 0xc0 31 #define IMSIC_EIE0 0xc0
32 #define IMSIC_EIE63 0xff 32 #define IMSIC_EIE63 0xff
33 #define IMSIC_EIEx_BITS 32 33 #define IMSIC_EIEx_BITS 32
34 34
35 #define IMSIC_FIRST IMSIC_ 35 #define IMSIC_FIRST IMSIC_EIDELIVERY
36 #define IMSIC_LAST IMSIC_ 36 #define IMSIC_LAST IMSIC_EIE63
37 37
38 #define IMSIC_MMIO_SETIPNUM_LE 0x00 38 #define IMSIC_MMIO_SETIPNUM_LE 0x00
39 #define IMSIC_MMIO_SETIPNUM_BE 0x04 39 #define IMSIC_MMIO_SETIPNUM_BE 0x04
40 40
41 struct imsic_local_config { 41 struct imsic_local_config {
42 phys_addr_t 42 phys_addr_t msi_pa;
43 void __iomem 43 void __iomem *msi_va;
44 }; 44 };
45 45
46 struct imsic_global_config { 46 struct imsic_global_config {
47 /* 47 /*
48 * MSI Target Address Scheme 48 * MSI Target Address Scheme
49 * 49 *
50 * XLEN-1 50 * XLEN-1 12 0
51 * | 51 * | | |
52 * ----------------------------------- 52 * -------------------------------------------------------------
53 * |xxxxxx|Group Index|xxxxxxxxxxx|HAR 53 * |xxxxxx|Group Index|xxxxxxxxxxx|HART Index|Guest Index| 0 |
54 * ----------------------------------- 54 * -------------------------------------------------------------
55 */ 55 */
56 56
57 /* Bits representing Guest index, HART 57 /* Bits representing Guest index, HART index, and Group index */
58 u32 58 u32 guest_index_bits;
59 u32 59 u32 hart_index_bits;
60 u32 60 u32 group_index_bits;
61 u32 61 u32 group_index_shift;
62 62
63 /* Global base address matching all ta 63 /* Global base address matching all target MSI addresses */
64 phys_addr_t 64 phys_addr_t base_addr;
65 65
66 /* Number of interrupt identities */ 66 /* Number of interrupt identities */
67 u32 67 u32 nr_ids;
68 68
69 /* Number of guest interrupt identitie 69 /* Number of guest interrupt identities */
70 u32 70 u32 nr_guest_ids;
71 71
72 /* Per-CPU IMSIC addresses */ 72 /* Per-CPU IMSIC addresses */
73 struct imsic_local_config __percpu 73 struct imsic_local_config __percpu *local;
74 }; 74 };
75 75
76 #ifdef CONFIG_RISCV_IMSIC 76 #ifdef CONFIG_RISCV_IMSIC
77 77
78 const struct imsic_global_config *imsic_get_gl 78 const struct imsic_global_config *imsic_get_global_config(void);
79 79
80 #else 80 #else
81 81
82 static inline const struct imsic_global_config 82 static inline const struct imsic_global_config *imsic_get_global_config(void)
83 { 83 {
84 return NULL; 84 return NULL;
85 } 85 }
86 86
87 #endif 87 #endif
88 88
89 #ifdef CONFIG_ACPI 89 #ifdef CONFIG_ACPI
90 int imsic_platform_acpi_probe(struct fwnode_ha 90 int imsic_platform_acpi_probe(struct fwnode_handle *fwnode);
91 struct fwnode_handle *imsic_acpi_get_fwnode(st 91 struct fwnode_handle *imsic_acpi_get_fwnode(struct device *dev);
92 #else 92 #else
93 static inline struct fwnode_handle *imsic_acpi 93 static inline struct fwnode_handle *imsic_acpi_get_fwnode(struct device *dev) { return NULL; }
94 #endif 94 #endif
95 95
96 #endif 96 #endif
97 97
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.