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

source code of linux/drivers/gpu/drm/vboxvideo/vbox_main.c