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 15 #include "vbox_drv.h" 16 #include "vboxvideo_guest.h" 17 #include "vboxvideo_vbe.h" 18 19 static void vbox_user_framebuffer_destroy(struct drm_framebuffer *fb) 20 { 21 struct vbox_framebuffer *vbox_fb = to_vbox_framebuffer(fb); 22 23 if (vbox_fb->obj) 24 drm_gem_object_put_unlocked(vbox_fb->obj); 25 26 drm_framebuffer_cleanup(fb); 27 kfree(fb); 28 } 29 30 void vbox_report_caps(struct vbox_private *vbox) 31 { 32 u32 caps = VBVACAPS_DISABLE_CURSOR_INTEGRATION | 33 VBVACAPS_IRQ | VBVACAPS_USE_VBVA_ONLY; 34 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); 39 } 40 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) 45 { 46 struct vbox_private *vbox = fb->dev->dev_private; 47 struct drm_display_mode *mode; 48 struct drm_crtc *crtc; 49 int crtc_x, crtc_y; 50 unsigned int i; 51 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) 55 continue; 56 57 mode = &crtc->state->mode; 58 crtc_x = crtc->primary->state->src_x >> 16; 59 crtc_y = crtc->primary->state->src_y >> 16; 60 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; 64 65 if (rects[i].x1 > crtc_x + mode->hdisplay || 66 rects[i].y1 > crtc_y + mode->vdisplay || 67 rects[i].x2 < crtc_x || 68 rects[i].y2 < crtc_y) 69 continue; 70 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; 75 76 if (!vbva_buffer_begin_update(&vbox->vbva_info[crtc_id], 77 vbox->guest_pool)) 78 continue; 79 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]); 83 } 84 } 85 mutex_unlock(&vbox->hw_mutex); 86 } 87 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) 93 { 94 vbox_framebuffer_dirty_rectangles(fb, rects, num_rects); 95 96 return 0; 97 } 98 99 static const struct drm_framebuffer_funcs vbox_fb_funcs = { 100 .destroy = vbox_user_framebuffer_destroy, 101 .dirty = vbox_user_framebuffer_dirty, 102 }; 103 104 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) 108 { 109 int ret; 110 111 drm_helper_mode_fill_fb_struct(&vbox->ddev, &vbox_fb->base, mode_cmd); 112 vbox_fb->obj = obj; 113 ret = drm_framebuffer_init(&vbox->ddev, &vbox_fb->base, &vbox_fb_funcs); 114 if (ret) { 115 DRM_ERROR("framebuffer init failed %d\n", ret); 116 return ret; 117 } 118 119 return 0; 120 } 121 122 static int vbox_accel_init(struct vbox_private *vbox) 123 { 124 struct vbva_buffer *vbva; 125 unsigned int i; 126 127 vbox->vbva_info = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs, 128 sizeof(*vbox->vbva_info), GFP_KERNEL); 129 if (!vbox->vbva_info) 130 return -ENOMEM; 131 132 /* 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; 134 135 vbox->vbva_buffers = pci_iomap_range(vbox->ddev.pdev, 0, 136 vbox->available_vram_size, 137 vbox->num_crtcs * 138 VBVA_MIN_BUFFER_SIZE); 139 if (!vbox->vbva_buffers) 140 return -ENOMEM; 141 142 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"); 153 } 154 } 155 156 return 0; 157 } 158 159 static void vbox_accel_fini(struct vbox_private *vbox) 160 { 161 unsigned int i; 162 163 for (i = 0; i < vbox->num_crtcs; ++i) 164 vbva_disable(&vbox->vbva_info[i], vbox->guest_pool, i); 165 166 pci_iounmap(vbox->ddev.pdev, vbox->vbva_buffers); 167 } 168 169 /* Do we support the 4.3 plus mode hint reporting interface? */ 170 static bool have_hgsmi_mode_hints(struct vbox_private *vbox) 171 { 172 u32 have_hints, have_cursor; 173 int ret; 174 175 ret = hgsmi_query_conf(vbox->guest_pool, 176 VBOX_VBVA_CONF32_MODE_HINT_REPORTING, 177 &have_hints); 178 if (ret) 179 return false; 180 181 ret = hgsmi_query_conf(vbox->guest_pool, 182 VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING, 183 &have_cursor); 184 if (ret) 185 return false; 186 187 return have_hints == VINF_SUCCESS && have_cursor == VINF_SUCCESS; 188 } 189 190 bool vbox_check_supported(u16 id) 191 { 192 u16 dispi_id; 193 194 vbox_write_ioport(VBE_DISPI_INDEX_ID, id); 195 dispi_id = inw(VBE_DISPI_IOPORT_DATA); 196 197 return dispi_id == id; 198 } 199 200 int vbox_hw_init(struct vbox_private *vbox) 201 { 202 int ret = -ENOMEM; 203 204 vbox->full_vram_size = inl(VBE_DISPI_IOPORT_DATA); 205 vbox->any_pitch = vbox_check_supported(VBE_DISPI_ID_ANYX); 206 207 DRM_INFO("VRAM %08x\n", vbox->full_vram_size); 208 209 /* Map guest-heap at end of vram */ 210 vbox->guest_heap = 211 pci_iomap_range(vbox->ddev.pdev, 0, GUEST_HEAP_OFFSET(vbox), 212 GUEST_HEAP_SIZE); 213 if (!vbox->guest_heap) 214 return -ENOMEM; 215 216 /* 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; 220 221 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); 225 if (ret) 226 goto err_destroy_guest_pool; 227 228 ret = hgsmi_test_query_conf(vbox->guest_pool); 229 if (ret) { 230 DRM_ERROR("vboxvideo: hgsmi_test_query_conf failed\n"); 231 goto err_destroy_guest_pool; 232 } 233 234 /* 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, 238 &vbox->num_crtcs); 239 vbox->num_crtcs = clamp_t(u32, vbox->num_crtcs, 1, VBOX_MAX_SCREENS); 240 241 if (!have_hgsmi_mode_hints(vbox)) { 242 ret = -ENOTSUPP; 243 goto err_destroy_guest_pool; 244 } 245 246 vbox->last_mode_hints = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs, 247 sizeof(struct vbva_modehint), 248 GFP_KERNEL); 249 if (!vbox->last_mode_hints) { 250 ret = -ENOMEM; 251 goto err_destroy_guest_pool; 252 } 253 254 ret = vbox_accel_init(vbox); 255 if (ret) 256 goto err_destroy_guest_pool; 257 258 return 0; 259 260 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); 264 return ret; 265 } 266 267 void vbox_hw_fini(struct vbox_private *vbox) 268 { 269 vbox_accel_fini(vbox); 270 gen_pool_destroy(vbox->guest_pool); 271 pci_iounmap(vbox->ddev.pdev, vbox->guest_heap); 272 } 273 274 int vbox_gem_create(struct vbox_private *vbox, 275 u32 size, bool iskernel, struct drm_gem_object **obj) 276 { 277 struct drm_gem_vram_object *gbo; 278 int ret; 279 280 *obj = NULL; 281 282 size = roundup(size, PAGE_SIZE); 283 if (size == 0) 284 return -EINVAL; 285 286 gbo = drm_gem_vram_create(&vbox->ddev, &vbox->ddev.vram_mm->bdev, 287 size, 0, false); 288 if (IS_ERR(gbo)) { 289 ret = PTR_ERR(gbo); 290 if (ret != -ERESTARTSYS) 291 DRM_ERROR("failed to allocate GEM object\n"); 292 return ret; 293 } 294 295 *obj = &gbo->bo.base; 296 297 return 0; 298 } 299