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> <<
12 #include <linux/fwnode.h> <<
13 #include <asm/csr.h> 11 #include <asm/csr.h>
14 12
15 #define IMSIC_MMIO_PAGE_SHIFT 12 13 #define IMSIC_MMIO_PAGE_SHIFT 12
16 #define IMSIC_MMIO_PAGE_SZ BIT(IM 14 #define IMSIC_MMIO_PAGE_SZ BIT(IMSIC_MMIO_PAGE_SHIFT)
17 #define IMSIC_MMIO_PAGE_LE 0x00 15 #define IMSIC_MMIO_PAGE_LE 0x00
18 #define IMSIC_MMIO_PAGE_BE 0x04 16 #define IMSIC_MMIO_PAGE_BE 0x04
19 17
20 #define IMSIC_MIN_ID 63 18 #define IMSIC_MIN_ID 63
21 #define IMSIC_MAX_ID 2048 19 #define IMSIC_MAX_ID 2048
22 20
23 #define IMSIC_EIDELIVERY 0x70 21 #define IMSIC_EIDELIVERY 0x70
24 22
25 #define IMSIC_EITHRESHOLD 0x72 23 #define IMSIC_EITHRESHOLD 0x72
26 24
27 #define IMSIC_EIP0 0x80 25 #define IMSIC_EIP0 0x80
28 #define IMSIC_EIP63 0xbf 26 #define IMSIC_EIP63 0xbf
29 #define IMSIC_EIPx_BITS 32 27 #define IMSIC_EIPx_BITS 32
30 28
31 #define IMSIC_EIE0 0xc0 29 #define IMSIC_EIE0 0xc0
32 #define IMSIC_EIE63 0xff 30 #define IMSIC_EIE63 0xff
33 #define IMSIC_EIEx_BITS 32 31 #define IMSIC_EIEx_BITS 32
34 32
35 #define IMSIC_FIRST IMSIC_ 33 #define IMSIC_FIRST IMSIC_EIDELIVERY
36 #define IMSIC_LAST IMSIC_ 34 #define IMSIC_LAST IMSIC_EIE63
37 35
38 #define IMSIC_MMIO_SETIPNUM_LE 0x00 36 #define IMSIC_MMIO_SETIPNUM_LE 0x00
39 #define IMSIC_MMIO_SETIPNUM_BE 0x04 37 #define IMSIC_MMIO_SETIPNUM_BE 0x04
40 38
41 struct imsic_local_config { 39 struct imsic_local_config {
42 phys_addr_t 40 phys_addr_t msi_pa;
43 void __iomem 41 void __iomem *msi_va;
44 }; 42 };
45 43
46 struct imsic_global_config { 44 struct imsic_global_config {
47 /* 45 /*
48 * MSI Target Address Scheme 46 * MSI Target Address Scheme
49 * 47 *
50 * XLEN-1 48 * XLEN-1 12 0
51 * | 49 * | | |
52 * ----------------------------------- 50 * -------------------------------------------------------------
53 * |xxxxxx|Group Index|xxxxxxxxxxx|HAR 51 * |xxxxxx|Group Index|xxxxxxxxxxx|HART Index|Guest Index| 0 |
54 * ----------------------------------- 52 * -------------------------------------------------------------
55 */ 53 */
56 54
57 /* Bits representing Guest index, HART 55 /* Bits representing Guest index, HART index, and Group index */
58 u32 56 u32 guest_index_bits;
59 u32 57 u32 hart_index_bits;
60 u32 58 u32 group_index_bits;
61 u32 59 u32 group_index_shift;
62 60
63 /* Global base address matching all ta 61 /* Global base address matching all target MSI addresses */
64 phys_addr_t 62 phys_addr_t base_addr;
65 63
66 /* Number of interrupt identities */ 64 /* Number of interrupt identities */
67 u32 65 u32 nr_ids;
68 66
69 /* Number of guest interrupt identitie 67 /* Number of guest interrupt identities */
70 u32 68 u32 nr_guest_ids;
71 69
72 /* Per-CPU IMSIC addresses */ 70 /* Per-CPU IMSIC addresses */
73 struct imsic_local_config __percpu 71 struct imsic_local_config __percpu *local;
74 }; 72 };
75 73
76 #ifdef CONFIG_RISCV_IMSIC 74 #ifdef CONFIG_RISCV_IMSIC
77 75
78 const struct imsic_global_config *imsic_get_gl 76 const struct imsic_global_config *imsic_get_global_config(void);
79 77
80 #else 78 #else
81 79
82 static inline const struct imsic_global_config 80 static inline const struct imsic_global_config *imsic_get_global_config(void)
83 { 81 {
84 return NULL; 82 return NULL;
85 } 83 }
86 84
87 #endif <<
88 <<
89 #ifdef CONFIG_ACPI <<
90 int imsic_platform_acpi_probe(struct fwnode_ha <<
91 struct fwnode_handle *imsic_acpi_get_fwnode(st <<
92 #else <<
93 static inline struct fwnode_handle *imsic_acpi <<
94 #endif 85 #endif
95 86
96 #endif 87 #endif
97 88
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