1 // SPDX-License-Identifier: MIT
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>
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>
17 #include "vboxvideo_guest.h"
18 #include "vboxvideo_vbe.h"
20 static void vbox_user_framebuffer_destroy(struct drm_framebuffer *fb)
22 struct vbox_framebuffer *vbox_fb = to_vbox_framebuffer(fb);
25 drm_gem_object_put_unlocked(vbox_fb->obj);
27 drm_framebuffer_cleanup(fb);
31 void vbox_report_caps(struct vbox_private *vbox)
33 u32 caps = VBVACAPS_DISABLE_CURSOR_INTEGRATION |
34 VBVACAPS_IRQ | VBVACAPS_USE_VBVA_ONLY;
36 /* The host only accepts VIDEO_MODE_HINTS if it is send separately. */
37 hgsmi_send_caps_info(vbox->guest_pool, caps);
38 caps |= VBVACAPS_VIDEO_MODE_HINTS;
39 hgsmi_send_caps_info(vbox->guest_pool, caps);
42 static const struct drm_framebuffer_funcs vbox_fb_funcs = {
43 .destroy = vbox_user_framebuffer_destroy,
44 .dirty = drm_atomic_helper_dirtyfb,
47 int vbox_framebuffer_init(struct vbox_private *vbox,
48 struct vbox_framebuffer *vbox_fb,
49 const struct drm_mode_fb_cmd2 *mode_cmd,
50 struct drm_gem_object *obj)
54 drm_helper_mode_fill_fb_struct(&vbox->ddev, &vbox_fb->base, mode_cmd);
56 ret = drm_framebuffer_init(&vbox->ddev, &vbox_fb->base, &vbox_fb_funcs);
58 DRM_ERROR("framebuffer init failed %d\n", ret);
65 static int vbox_accel_init(struct vbox_private *vbox)
67 struct vbva_buffer *vbva;
70 vbox->vbva_info = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,
71 sizeof(*vbox->vbva_info), GFP_KERNEL);
75 /* Take a command buffer for each screen from the end of usable VRAM. */
76 vbox->available_vram_size -= vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE;
78 vbox->vbva_buffers = pci_iomap_range(vbox->ddev.pdev, 0,
79 vbox->available_vram_size,
81 VBVA_MIN_BUFFER_SIZE);
82 if (!vbox->vbva_buffers)
85 for (i = 0; i < vbox->num_crtcs; ++i) {
86 vbva_setup_buffer_context(&vbox->vbva_info[i],
87 vbox->available_vram_size +
88 i * VBVA_MIN_BUFFER_SIZE,
89 VBVA_MIN_BUFFER_SIZE);
90 vbva = (void __force *)vbox->vbva_buffers +
91 i * VBVA_MIN_BUFFER_SIZE;
92 if (!vbva_enable(&vbox->vbva_info[i],
93 vbox->guest_pool, vbva, i)) {
94 /* very old host or driver error. */
95 DRM_ERROR("vboxvideo: vbva_enable failed\n");
102 static void vbox_accel_fini(struct vbox_private *vbox)
106 for (i = 0; i < vbox->num_crtcs; ++i)
107 vbva_disable(&vbox->vbva_info[i], vbox->guest_pool, i);
109 pci_iounmap(vbox->ddev.pdev, vbox->vbva_buffers);
112 /* Do we support the 4.3 plus mode hint reporting interface? */
113 static bool have_hgsmi_mode_hints(struct vbox_private *vbox)
115 u32 have_hints, have_cursor;
118 ret = hgsmi_query_conf(vbox->guest_pool,
119 VBOX_VBVA_CONF32_MODE_HINT_REPORTING,
124 ret = hgsmi_query_conf(vbox->guest_pool,
125 VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING,
130 return have_hints == VINF_SUCCESS && have_cursor == VINF_SUCCESS;
133 bool vbox_check_supported(u16 id)
137 vbox_write_ioport(VBE_DISPI_INDEX_ID, id);
138 dispi_id = inw(VBE_DISPI_IOPORT_DATA);
140 return dispi_id == id;
143 int vbox_hw_init(struct vbox_private *vbox)
147 vbox->full_vram_size = inl(VBE_DISPI_IOPORT_DATA);
148 vbox->any_pitch = vbox_check_supported(VBE_DISPI_ID_ANYX);
150 DRM_INFO("VRAM %08x\n", vbox->full_vram_size);
152 /* Map guest-heap at end of vram */
154 pci_iomap_range(vbox->ddev.pdev, 0, GUEST_HEAP_OFFSET(vbox),
156 if (!vbox->guest_heap)
159 /* Create guest-heap mem-pool use 2^4 = 16 byte chunks */
160 vbox->guest_pool = gen_pool_create(4, -1);
161 if (!vbox->guest_pool)
162 goto err_unmap_guest_heap;
164 ret = gen_pool_add_virt(vbox->guest_pool,
165 (unsigned long)vbox->guest_heap,
166 GUEST_HEAP_OFFSET(vbox),
167 GUEST_HEAP_USABLE_SIZE, -1);
169 goto err_destroy_guest_pool;
171 ret = hgsmi_test_query_conf(vbox->guest_pool);
173 DRM_ERROR("vboxvideo: hgsmi_test_query_conf failed\n");
174 goto err_destroy_guest_pool;
177 /* Reduce available VRAM size to reflect the guest heap. */
178 vbox->available_vram_size = GUEST_HEAP_OFFSET(vbox);
179 /* Linux drm represents monitors as a 32-bit array. */
180 hgsmi_query_conf(vbox->guest_pool, VBOX_VBVA_CONF32_MONITOR_COUNT,
182 vbox->num_crtcs = clamp_t(u32, vbox->num_crtcs, 1, VBOX_MAX_SCREENS);
184 if (!have_hgsmi_mode_hints(vbox)) {
186 goto err_destroy_guest_pool;
189 vbox->last_mode_hints = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,
190 sizeof(struct vbva_modehint),
192 if (!vbox->last_mode_hints) {
194 goto err_destroy_guest_pool;
197 ret = vbox_accel_init(vbox);
199 goto err_destroy_guest_pool;
203 err_destroy_guest_pool:
204 gen_pool_destroy(vbox->guest_pool);
205 err_unmap_guest_heap:
206 pci_iounmap(vbox->ddev.pdev, vbox->guest_heap);
210 void vbox_hw_fini(struct vbox_private *vbox)
212 vbox_accel_fini(vbox);
213 gen_pool_destroy(vbox->guest_pool);
214 pci_iounmap(vbox->ddev.pdev, vbox->guest_heap);
217 int vbox_gem_create(struct vbox_private *vbox,
218 u32 size, bool iskernel, struct drm_gem_object **obj)
220 struct drm_gem_vram_object *gbo;
225 size = roundup(size, PAGE_SIZE);
229 gbo = drm_gem_vram_create(&vbox->ddev, &vbox->ddev.vram_mm->bdev,
233 if (ret != -ERESTARTSYS)
234 DRM_ERROR("failed to allocate GEM object\n");
238 *obj = &gbo->bo.base;