1// SPDX-License-Identifier: GPL-2.0 OR MIT
2/*
3 * Copyright 2021 VMware, Inc., Palo Alto, CA., USA
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portions
15 * of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
20 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
23 * USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 */
26#ifndef _VMWGFX_MSG_ARM64_H
27#define _VMWGFX_MSG_ARM64_H
28
29#if defined(__aarch64__)
30
31#define VMWARE_HYPERVISOR_PORT 0x5658
32#define VMWARE_HYPERVISOR_PORT_HB 0x5659
33
34#define VMWARE_HYPERVISOR_HB BIT(0)
35#define VMWARE_HYPERVISOR_OUT BIT(1)
36
37#define X86_IO_MAGIC 0x86
38
39#define X86_IO_W7_SIZE_SHIFT 0
40#define X86_IO_W7_SIZE_MASK (0x3 << X86_IO_W7_SIZE_SHIFT)
41#define X86_IO_W7_DIR (1 << 2)
42#define X86_IO_W7_WITH (1 << 3)
43#define X86_IO_W7_STR (1 << 4)
44#define X86_IO_W7_DF (1 << 5)
45#define X86_IO_W7_IMM_SHIFT 5
46#define X86_IO_W7_IMM_MASK (0xff << X86_IO_W7_IMM_SHIFT)
47
48static inline void vmw_port(unsigned long cmd, unsigned long in_ebx,
49 unsigned long in_si, unsigned long in_di,
50 unsigned long flags, unsigned long magic,
51 unsigned long *eax, unsigned long *ebx,
52 unsigned long *ecx, unsigned long *edx,
53 unsigned long *si, unsigned long *di)
54{
55 register u64 x0 asm("x0") = magic;
56 register u64 x1 asm("x1") = in_ebx;
57 register u64 x2 asm("x2") = cmd;
58 register u64 x3 asm("x3") = flags | VMWARE_HYPERVISOR_PORT;
59 register u64 x4 asm("x4") = in_si;
60 register u64 x5 asm("x5") = in_di;
61
62 register u64 x7 asm("x7") = ((u64)X86_IO_MAGIC << 32) |
63 X86_IO_W7_WITH |
64 X86_IO_W7_DIR |
65 (2 << X86_IO_W7_SIZE_SHIFT);
66
67 asm volatile("mrs xzr, mdccsr_el0 \n\t"
68 : "+r"(x0), "+r"(x1), "+r"(x2),
69 "+r"(x3), "+r"(x4), "+r"(x5)
70 : "r"(x7)
71 :);
72 *eax = x0;
73 *ebx = x1;
74 *ecx = x2;
75 *edx = x3;
76 *si = x4;
77 *di = x5;
78}
79
80static inline void vmw_port_hb(unsigned long cmd, unsigned long in_ecx,
81 unsigned long in_si, unsigned long in_di,
82 unsigned long flags, unsigned long magic,
83 unsigned long bp, u32 w7dir,
84 unsigned long *eax, unsigned long *ebx,
85 unsigned long *ecx, unsigned long *edx,
86 unsigned long *si, unsigned long *di)
87{
88 register u64 x0 asm("x0") = magic;
89 register u64 x1 asm("x1") = cmd;
90 register u64 x2 asm("x2") = in_ecx;
91 register u64 x3 asm("x3") = flags | VMWARE_HYPERVISOR_PORT_HB;
92 register u64 x4 asm("x4") = in_si;
93 register u64 x5 asm("x5") = in_di;
94 register u64 x6 asm("x6") = bp;
95 register u64 x7 asm("x7") = ((u64)X86_IO_MAGIC << 32) |
96 X86_IO_W7_STR |
97 X86_IO_W7_WITH |
98 w7dir;
99
100 asm volatile("mrs xzr, mdccsr_el0 \n\t"
101 : "+r"(x0), "+r"(x1), "+r"(x2),
102 "+r"(x3), "+r"(x4), "+r"(x5)
103 : "r"(x6), "r"(x7)
104 :);
105 *eax = x0;
106 *ebx = x1;
107 *ecx = x2;
108 *edx = x3;
109 *si = x4;
110 *di = x5;
111}
112
113#define VMW_PORT(cmd, in_ebx, in_si, in_di, flags, magic, eax, ebx, ecx, edx, \
114 si, di) \
115 vmw_port(cmd, in_ebx, in_si, in_di, flags, magic, &eax, &ebx, &ecx, \
116 &edx, &si, &di)
117
118#define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, flags, magic, bp, eax, ebx, \
119 ecx, edx, si, di) \
120 vmw_port_hb(cmd, in_ecx, in_si, in_di, flags, magic, bp, \
121 0, &eax, &ebx, &ecx, &edx, &si, &di)
122
123#define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, flags, magic, bp, eax, ebx, \
124 ecx, edx, si, di) \
125 vmw_port_hb(cmd, in_ecx, in_si, in_di, flags, magic, bp, \
126 X86_IO_W7_DIR, &eax, &ebx, &ecx, &edx, &si, &di)
127
128#endif
129
130#endif /* _VMWGFX_MSG_ARM64_H */
131

source code of linux/drivers/gpu/drm/vmwgfx/vmwgfx_msg_arm64.h