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/pci.h>
12 #include <linux/vbox_err.h>
13
14 #include <drm/drm_fb_helper.h>
15 #include <drm/drm_crtc_helper.h>
16 #include <drm/drm_damage_helper.h>
17
18 #include "vbox_drv.h"
19 #include "vboxvideo_guest.h"
20 #include "vboxvideo_vbe.h"
21
vbox_report_caps(struct vbox_private * vbox)22 void vbox_report_caps(struct vbox_private *vbox)
23 {
24 u32 caps = VBVACAPS_DISABLE_CURSOR_INTEGRATION |
25 VBVACAPS_IRQ | VBVACAPS_USE_VBVA_ONLY;
26
27 /* The host only accepts VIDEO_MODE_HINTS if it is send separately. */
28 hgsmi_send_caps_info(vbox->guest_pool, caps);
29 caps |= VBVACAPS_VIDEO_MODE_HINTS;
30 hgsmi_send_caps_info(vbox->guest_pool, caps);
31 }
32
vbox_accel_init(struct vbox_private * vbox)33 static int vbox_accel_init(struct vbox_private *vbox)
34 {
35 struct pci_dev *pdev = to_pci_dev(vbox->ddev.dev);
36 struct vbva_buffer *vbva;
37 unsigned int i;
38
39 vbox->vbva_info = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,
40 sizeof(*vbox->vbva_info), GFP_KERNEL);
41 if (!vbox->vbva_info)
42 return -ENOMEM;
43
44 /* Take a command buffer for each screen from the end of usable VRAM. */
45 vbox->available_vram_size -= vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE;
46
47 vbox->vbva_buffers = pci_iomap_range(pdev, 0,
48 vbox->available_vram_size,
49 vbox->num_crtcs *
50 VBVA_MIN_BUFFER_SIZE);
51 if (!vbox->vbva_buffers)
52 return -ENOMEM;
53
54 for (i = 0; i < vbox->num_crtcs; ++i) {
55 vbva_setup_buffer_context(&vbox->vbva_info[i],
56 vbox->available_vram_size +
57 i * VBVA_MIN_BUFFER_SIZE,
58 VBVA_MIN_BUFFER_SIZE);
59 vbva = (void __force *)vbox->vbva_buffers +
60 i * VBVA_MIN_BUFFER_SIZE;
61 if (!vbva_enable(&vbox->vbva_info[i],
62 vbox->guest_pool, vbva, i)) {
63 /* very old host or driver error. */
64 DRM_ERROR("vboxvideo: vbva_enable failed\n");
65 }
66 }
67
68 return 0;
69 }
70
vbox_accel_fini(struct vbox_private * vbox)71 static void vbox_accel_fini(struct vbox_private *vbox)
72 {
73 unsigned int i;
74
75 for (i = 0; i < vbox->num_crtcs; ++i)
76 vbva_disable(&vbox->vbva_info[i], vbox->guest_pool, i);
77 }
78
79 /* Do we support the 4.3 plus mode hint reporting interface? */
have_hgsmi_mode_hints(struct vbox_private * vbox)80 static bool have_hgsmi_mode_hints(struct vbox_private *vbox)
81 {
82 u32 have_hints, have_cursor;
83 int ret;
84
85 ret = hgsmi_query_conf(vbox->guest_pool,
86 VBOX_VBVA_CONF32_MODE_HINT_REPORTING,
87 &have_hints);
88 if (ret)
89 return false;
90
91 ret = hgsmi_query_conf(vbox->guest_pool,
92 VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING,
93 &have_cursor);
94 if (ret)
95 return false;
96
97 return have_hints == VINF_SUCCESS && have_cursor == VINF_SUCCESS;
98 }
99
vbox_check_supported(u16 id)100 bool vbox_check_supported(u16 id)
101 {
102 u16 dispi_id;
103
104 vbox_write_ioport(VBE_DISPI_INDEX_ID, id);
105 dispi_id = inw(VBE_DISPI_IOPORT_DATA);
106
107 return dispi_id == id;
108 }
109
vbox_hw_init(struct vbox_private * vbox)110 int vbox_hw_init(struct vbox_private *vbox)
111 {
112 struct pci_dev *pdev = to_pci_dev(vbox->ddev.dev);
113 int ret = -ENOMEM;
114
115 vbox->full_vram_size = inl(VBE_DISPI_IOPORT_DATA);
116 vbox->any_pitch = vbox_check_supported(VBE_DISPI_ID_ANYX);
117
118 DRM_INFO("VRAM %08x\n", vbox->full_vram_size);
119
120 /* Map guest-heap at end of vram */
121 vbox->guest_heap =
122 pci_iomap_range(pdev, 0, GUEST_HEAP_OFFSET(vbox),
123 GUEST_HEAP_SIZE);
124 if (!vbox->guest_heap)
125 return -ENOMEM;
126
127 /* Create guest-heap mem-pool use 2^4 = 16 byte chunks */
128 vbox->guest_pool = devm_gen_pool_create(vbox->ddev.dev, 4, -1,
129 "vboxvideo-accel");
130 if (!vbox->guest_pool)
131 return -ENOMEM;
132
133 ret = gen_pool_add_virt(vbox->guest_pool,
134 (unsigned long)vbox->guest_heap,
135 GUEST_HEAP_OFFSET(vbox),
136 GUEST_HEAP_USABLE_SIZE, -1);
137 if (ret)
138 return ret;
139
140 ret = hgsmi_test_query_conf(vbox->guest_pool);
141 if (ret) {
142 DRM_ERROR("vboxvideo: hgsmi_test_query_conf failed\n");
143 return ret;
144 }
145
146 /* Reduce available VRAM size to reflect the guest heap. */
147 vbox->available_vram_size = GUEST_HEAP_OFFSET(vbox);
148 /* Linux drm represents monitors as a 32-bit array. */
149 hgsmi_query_conf(vbox->guest_pool, VBOX_VBVA_CONF32_MONITOR_COUNT,
150 &vbox->num_crtcs);
151 vbox->num_crtcs = clamp_t(u32, vbox->num_crtcs, 1, VBOX_MAX_SCREENS);
152
153 if (!have_hgsmi_mode_hints(vbox)) {
154 ret = -ENOTSUPP;
155 return ret;
156 }
157
158 vbox->last_mode_hints = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,
159 sizeof(struct vbva_modehint),
160 GFP_KERNEL);
161 if (!vbox->last_mode_hints)
162 return -ENOMEM;
163
164 ret = vbox_accel_init(vbox);
165 if (ret)
166 return ret;
167
168 return 0;
169 }
170
vbox_hw_fini(struct vbox_private * vbox)171 void vbox_hw_fini(struct vbox_private *vbox)
172 {
173 vbox_accel_fini(vbox);
174 }
175