1 // SPDX-License-Identifier: MIT
2 /*
3 * Copyright (C) 2013-2017 Oracle Corporation
4 * This file is based on ast_main.c
5 * Copyright 2012 Red Hat Inc.
6 * Authors: Dave Airlie <airlied@redhat.com>,
7 * Michael Thayer <michael.thayer@oracle.com,
8 * Hans de Goede <hdegoede@redhat.com>
9 */
10
11 #include <linux/vbox_err.h>
12 #include <drm/drm_fb_helper.h>
13 #include <drm/drm_crtc_helper.h>
14 #include <drm/drm_damage_helper.h>
15
16 #include "vbox_drv.h"
17 #include "vboxvideo_guest.h"
18 #include "vboxvideo_vbe.h"
19
vbox_report_caps(struct vbox_private * vbox)20 void vbox_report_caps(struct vbox_private *vbox)
21 {
22 u32 caps = VBVACAPS_DISABLE_CURSOR_INTEGRATION |
23 VBVACAPS_IRQ | VBVACAPS_USE_VBVA_ONLY;
24
25 /* The host only accepts VIDEO_MODE_HINTS if it is send separately. */
26 hgsmi_send_caps_info(vbox->guest_pool, caps);
27 caps |= VBVACAPS_VIDEO_MODE_HINTS;
28 hgsmi_send_caps_info(vbox->guest_pool, caps);
29 }
30
vbox_accel_init(struct vbox_private * vbox)31 static int vbox_accel_init(struct vbox_private *vbox)
32 {
33 struct vbva_buffer *vbva;
34 unsigned int i;
35
36 vbox->vbva_info = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,
37 sizeof(*vbox->vbva_info), GFP_KERNEL);
38 if (!vbox->vbva_info)
39 return -ENOMEM;
40
41 /* Take a command buffer for each screen from the end of usable VRAM. */
42 vbox->available_vram_size -= vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE;
43
44 vbox->vbva_buffers = pci_iomap_range(vbox->ddev.pdev, 0,
45 vbox->available_vram_size,
46 vbox->num_crtcs *
47 VBVA_MIN_BUFFER_SIZE);
48 if (!vbox->vbva_buffers)
49 return -ENOMEM;
50
51 for (i = 0; i < vbox->num_crtcs; ++i) {
52 vbva_setup_buffer_context(&vbox->vbva_info[i],
53 vbox->available_vram_size +
54 i * VBVA_MIN_BUFFER_SIZE,
55 VBVA_MIN_BUFFER_SIZE);
56 vbva = (void __force *)vbox->vbva_buffers +
57 i * VBVA_MIN_BUFFER_SIZE;
58 if (!vbva_enable(&vbox->vbva_info[i],
59 vbox->guest_pool, vbva, i)) {
60 /* very old host or driver error. */
61 DRM_ERROR("vboxvideo: vbva_enable failed\n");
62 }
63 }
64
65 return 0;
66 }
67
vbox_accel_fini(struct vbox_private * vbox)68 static void vbox_accel_fini(struct vbox_private *vbox)
69 {
70 unsigned int i;
71
72 for (i = 0; i < vbox->num_crtcs; ++i)
73 vbva_disable(&vbox->vbva_info[i], vbox->guest_pool, i);
74 }
75
76 /* Do we support the 4.3 plus mode hint reporting interface? */
have_hgsmi_mode_hints(struct vbox_private * vbox)77 static bool have_hgsmi_mode_hints(struct vbox_private *vbox)
78 {
79 u32 have_hints, have_cursor;
80 int ret;
81
82 ret = hgsmi_query_conf(vbox->guest_pool,
83 VBOX_VBVA_CONF32_MODE_HINT_REPORTING,
84 &have_hints);
85 if (ret)
86 return false;
87
88 ret = hgsmi_query_conf(vbox->guest_pool,
89 VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING,
90 &have_cursor);
91 if (ret)
92 return false;
93
94 return have_hints == VINF_SUCCESS && have_cursor == VINF_SUCCESS;
95 }
96
vbox_check_supported(u16 id)97 bool vbox_check_supported(u16 id)
98 {
99 u16 dispi_id;
100
101 vbox_write_ioport(VBE_DISPI_INDEX_ID, id);
102 dispi_id = inw(VBE_DISPI_IOPORT_DATA);
103
104 return dispi_id == id;
105 }
106
vbox_hw_init(struct vbox_private * vbox)107 int vbox_hw_init(struct vbox_private *vbox)
108 {
109 int ret = -ENOMEM;
110
111 vbox->full_vram_size = inl(VBE_DISPI_IOPORT_DATA);
112 vbox->any_pitch = vbox_check_supported(VBE_DISPI_ID_ANYX);
113
114 DRM_INFO("VRAM %08x\n", vbox->full_vram_size);
115
116 /* Map guest-heap at end of vram */
117 vbox->guest_heap =
118 pci_iomap_range(vbox->ddev.pdev, 0, GUEST_HEAP_OFFSET(vbox),
119 GUEST_HEAP_SIZE);
120 if (!vbox->guest_heap)
121 return -ENOMEM;
122
123 /* Create guest-heap mem-pool use 2^4 = 16 byte chunks */
124 vbox->guest_pool = devm_gen_pool_create(vbox->ddev.dev, 4, -1,
125 "vboxvideo-accel");
126 if (!vbox->guest_pool)
127 return -ENOMEM;
128
129 ret = gen_pool_add_virt(vbox->guest_pool,
130 (unsigned long)vbox->guest_heap,
131 GUEST_HEAP_OFFSET(vbox),
132 GUEST_HEAP_USABLE_SIZE, -1);
133 if (ret)
134 return ret;
135
136 ret = hgsmi_test_query_conf(vbox->guest_pool);
137 if (ret) {
138 DRM_ERROR("vboxvideo: hgsmi_test_query_conf failed\n");
139 return ret;
140 }
141
142 /* Reduce available VRAM size to reflect the guest heap. */
143 vbox->available_vram_size = GUEST_HEAP_OFFSET(vbox);
144 /* Linux drm represents monitors as a 32-bit array. */
145 hgsmi_query_conf(vbox->guest_pool, VBOX_VBVA_CONF32_MONITOR_COUNT,
146 &vbox->num_crtcs);
147 vbox->num_crtcs = clamp_t(u32, vbox->num_crtcs, 1, VBOX_MAX_SCREENS);
148
149 if (!have_hgsmi_mode_hints(vbox)) {
150 ret = -ENOTSUPP;
151 return ret;
152 }
153
154 vbox->last_mode_hints = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,
155 sizeof(struct vbva_modehint),
156 GFP_KERNEL);
157 if (!vbox->last_mode_hints)
158 return -ENOMEM;
159
160 ret = vbox_accel_init(vbox);
161 if (ret)
162 return ret;
163
164 return 0;
165 }
166
vbox_hw_fini(struct vbox_private * vbox)167 void vbox_hw_fini(struct vbox_private *vbox)
168 {
169 vbox_accel_fini(vbox);
170 }
171
