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>
16 #include "vboxvideo_guest.h"
17 #include "vboxvideo_vbe.h"
19 static void vbox_user_framebuffer_destroy(struct drm_framebuffer *fb)
21 struct vbox_framebuffer *vbox_fb = to_vbox_framebuffer(fb);
24 drm_gem_object_put_unlocked(vbox_fb->obj);
26 drm_framebuffer_cleanup(fb);
30 void vbox_report_caps(struct vbox_private *vbox)
32 u32 caps = VBVACAPS_DISABLE_CURSOR_INTEGRATION |
33 VBVACAPS_IRQ | VBVACAPS_USE_VBVA_ONLY;
35 /* The host only accepts VIDEO_MODE_HINTS if it is send separately. */
36 hgsmi_send_caps_info(vbox->guest_pool, caps);
37 caps |= VBVACAPS_VIDEO_MODE_HINTS;
38 hgsmi_send_caps_info(vbox->guest_pool, caps);
41 /* Send information about dirty rectangles to VBVA. */
42 void vbox_framebuffer_dirty_rectangles(struct drm_framebuffer *fb,
43 struct drm_clip_rect *rects,
44 unsigned int num_rects)
46 struct vbox_private *vbox = fb->dev->dev_private;
47 struct drm_display_mode *mode;
48 struct drm_crtc *crtc;
52 mutex_lock(&vbox->hw_mutex);
53 list_for_each_entry(crtc, &fb->dev->mode_config.crtc_list, head) {
54 if (crtc->primary->state->fb != fb)
57 mode = &crtc->state->mode;
58 crtc_x = crtc->primary->state->src_x >> 16;
59 crtc_y = crtc->primary->state->src_y >> 16;
61 for (i = 0; i < num_rects; ++i) {
62 struct vbva_cmd_hdr cmd_hdr;
63 unsigned int crtc_id = to_vbox_crtc(crtc)->crtc_id;
65 if (rects[i].x1 > crtc_x + mode->hdisplay ||
66 rects[i].y1 > crtc_y + mode->vdisplay ||
67 rects[i].x2 < crtc_x ||
71 cmd_hdr.x = (s16)rects[i].x1;
72 cmd_hdr.y = (s16)rects[i].y1;
73 cmd_hdr.w = (u16)rects[i].x2 - rects[i].x1;
74 cmd_hdr.h = (u16)rects[i].y2 - rects[i].y1;
76 if (!vbva_buffer_begin_update(&vbox->vbva_info[crtc_id],
80 vbva_write(&vbox->vbva_info[crtc_id], vbox->guest_pool,
81 &cmd_hdr, sizeof(cmd_hdr));
82 vbva_buffer_end_update(&vbox->vbva_info[crtc_id]);
85 mutex_unlock(&vbox->hw_mutex);
88 static int vbox_user_framebuffer_dirty(struct drm_framebuffer *fb,
89 struct drm_file *file_priv,
90 unsigned int flags, unsigned int color,
91 struct drm_clip_rect *rects,
92 unsigned int num_rects)
94 vbox_framebuffer_dirty_rectangles(fb, rects, num_rects);
99 static const struct drm_framebuffer_funcs vbox_fb_funcs = {
100 .destroy = vbox_user_framebuffer_destroy,
101 .dirty = vbox_user_framebuffer_dirty,
104 int vbox_framebuffer_init(struct vbox_private *vbox,
105 struct vbox_framebuffer *vbox_fb,
106 const struct drm_mode_fb_cmd2 *mode_cmd,
107 struct drm_gem_object *obj)
111 drm_helper_mode_fill_fb_struct(&vbox->ddev, &vbox_fb->base, mode_cmd);
113 ret = drm_framebuffer_init(&vbox->ddev, &vbox_fb->base, &vbox_fb_funcs);
115 DRM_ERROR("framebuffer init failed %d\n", ret);
122 static int vbox_accel_init(struct vbox_private *vbox)
124 struct vbva_buffer *vbva;
127 vbox->vbva_info = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,
128 sizeof(*vbox->vbva_info), GFP_KERNEL);
129 if (!vbox->vbva_info)
132 /* Take a command buffer for each screen from the end of usable VRAM. */
133 vbox->available_vram_size -= vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE;
135 vbox->vbva_buffers = pci_iomap_range(vbox->ddev.pdev, 0,
136 vbox->available_vram_size,
138 VBVA_MIN_BUFFER_SIZE);
139 if (!vbox->vbva_buffers)
142 for (i = 0; i < vbox->num_crtcs; ++i) {
143 vbva_setup_buffer_context(&vbox->vbva_info[i],
144 vbox->available_vram_size +
145 i * VBVA_MIN_BUFFER_SIZE,
146 VBVA_MIN_BUFFER_SIZE);
147 vbva = (void __force *)vbox->vbva_buffers +
148 i * VBVA_MIN_BUFFER_SIZE;
149 if (!vbva_enable(&vbox->vbva_info[i],
150 vbox->guest_pool, vbva, i)) {
151 /* very old host or driver error. */
152 DRM_ERROR("vboxvideo: vbva_enable failed\n");
159 static void vbox_accel_fini(struct vbox_private *vbox)
163 for (i = 0; i < vbox->num_crtcs; ++i)
164 vbva_disable(&vbox->vbva_info[i], vbox->guest_pool, i);
166 pci_iounmap(vbox->ddev.pdev, vbox->vbva_buffers);
169 /* Do we support the 4.3 plus mode hint reporting interface? */
170 static bool have_hgsmi_mode_hints(struct vbox_private *vbox)
172 u32 have_hints, have_cursor;
175 ret = hgsmi_query_conf(vbox->guest_pool,
176 VBOX_VBVA_CONF32_MODE_HINT_REPORTING,
181 ret = hgsmi_query_conf(vbox->guest_pool,
182 VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING,
187 return have_hints == VINF_SUCCESS && have_cursor == VINF_SUCCESS;
190 bool vbox_check_supported(u16 id)
194 vbox_write_ioport(VBE_DISPI_INDEX_ID, id);
195 dispi_id = inw(VBE_DISPI_IOPORT_DATA);
197 return dispi_id == id;
200 int vbox_hw_init(struct vbox_private *vbox)
204 vbox->full_vram_size = inl(VBE_DISPI_IOPORT_DATA);
205 vbox->any_pitch = vbox_check_supported(VBE_DISPI_ID_ANYX);
207 DRM_INFO("VRAM %08x\n", vbox->full_vram_size);
209 /* Map guest-heap at end of vram */
211 pci_iomap_range(vbox->ddev.pdev, 0, GUEST_HEAP_OFFSET(vbox),
213 if (!vbox->guest_heap)
216 /* Create guest-heap mem-pool use 2^4 = 16 byte chunks */
217 vbox->guest_pool = gen_pool_create(4, -1);
218 if (!vbox->guest_pool)
219 goto err_unmap_guest_heap;
221 ret = gen_pool_add_virt(vbox->guest_pool,
222 (unsigned long)vbox->guest_heap,
223 GUEST_HEAP_OFFSET(vbox),
224 GUEST_HEAP_USABLE_SIZE, -1);
226 goto err_destroy_guest_pool;
228 ret = hgsmi_test_query_conf(vbox->guest_pool);
230 DRM_ERROR("vboxvideo: hgsmi_test_query_conf failed\n");
231 goto err_destroy_guest_pool;
234 /* Reduce available VRAM size to reflect the guest heap. */
235 vbox->available_vram_size = GUEST_HEAP_OFFSET(vbox);
236 /* Linux drm represents monitors as a 32-bit array. */
237 hgsmi_query_conf(vbox->guest_pool, VBOX_VBVA_CONF32_MONITOR_COUNT,
239 vbox->num_crtcs = clamp_t(u32, vbox->num_crtcs, 1, VBOX_MAX_SCREENS);
241 if (!have_hgsmi_mode_hints(vbox)) {
243 goto err_destroy_guest_pool;
246 vbox->last_mode_hints = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,
247 sizeof(struct vbva_modehint),
249 if (!vbox->last_mode_hints) {
251 goto err_destroy_guest_pool;
254 ret = vbox_accel_init(vbox);
256 goto err_destroy_guest_pool;
260 err_destroy_guest_pool:
261 gen_pool_destroy(vbox->guest_pool);
262 err_unmap_guest_heap:
263 pci_iounmap(vbox->ddev.pdev, vbox->guest_heap);
267 void vbox_hw_fini(struct vbox_private *vbox)
269 vbox_accel_fini(vbox);
270 gen_pool_destroy(vbox->guest_pool);
271 pci_iounmap(vbox->ddev.pdev, vbox->guest_heap);
274 int vbox_gem_create(struct vbox_private *vbox,
275 u32 size, bool iskernel, struct drm_gem_object **obj)
277 struct drm_gem_vram_object *gbo;
282 size = roundup(size, PAGE_SIZE);
286 gbo = drm_gem_vram_create(&vbox->ddev, &vbox->ddev.vram_mm->bdev,
290 if (ret != -ERESTARTSYS)
291 DRM_ERROR("failed to allocate GEM object\n");