drivers/gpu/drm/vmwgfx/vmwgfx_drv.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27 #include <linux/module.h>
  28
  29 #include <drm/drmP.h>
  30 #include "vmwgfx_drv.h"
  31 #include <drm/ttm/ttm_placement.h>
  32 #include <drm/ttm/ttm_bo_driver.h>
  33 #include <drm/ttm/ttm_object.h>
  34 #include <drm/ttm/ttm_module.h>
  35 #include <linux/dma_remapping.h>
  36
  37 #define VMWGFX_DRIVER_NAME "vmwgfx"
  38 #define VMWGFX_DRIVER_DESC "Linux drm driver for VMware graphics devices"
  39 #define VMWGFX_CHIP_SVGAII 0
  40 #define VMW_FB_RESERVATION 0
  41
  42 #define VMW_MIN_INITIAL_WIDTH 800
  43 #define VMW_MIN_INITIAL_HEIGHT 600
  44
  45
  46 /**
  47  * Fully encoded drm commands. Might move to vmw_drm.h
  48  */
  49
  50 #define DRM_IOCTL_VMW_GET_PARAM                                 \
  51         DRM_IOWR(DRM_COMMAND_BASE + DRM_VMW_GET_PARAM,          \
  52                  struct drm_vmw_getparam_arg)
  53 #define DRM_IOCTL_VMW_ALLOC_DMABUF                              \
  54         DRM_IOWR(DRM_COMMAND_BASE + DRM_VMW_ALLOC_DMABUF,       \
  55                 union drm_vmw_alloc_dmabuf_arg)
  56 #define DRM_IOCTL_VMW_UNREF_DMABUF                              \
  57         DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_UNREF_DMABUF,        \
  58                 struct drm_vmw_unref_dmabuf_arg)
  59 #define DRM_IOCTL_VMW_CURSOR_BYPASS                             \
  60         DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_CURSOR_BYPASS,       \
  61                  struct drm_vmw_cursor_bypass_arg)
  62
  63 #define DRM_IOCTL_VMW_CONTROL_STREAM                            \
  64         DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_CONTROL_STREAM,      \
  65                  struct drm_vmw_control_stream_arg)
  66 #define DRM_IOCTL_VMW_CLAIM_STREAM                              \
  67         DRM_IOR(DRM_COMMAND_BASE + DRM_VMW_CLAIM_STREAM,        \
  68                  struct drm_vmw_stream_arg)
  69 #define DRM_IOCTL_VMW_UNREF_STREAM                              \
  70         DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_UNREF_STREAM,        \
  71                  struct drm_vmw_stream_arg)
  72
  73 #define DRM_IOCTL_VMW_CREATE_CONTEXT                            \
  74         DRM_IOR(DRM_COMMAND_BASE + DRM_VMW_CREATE_CONTEXT,      \
  75                 struct drm_vmw_context_arg)
  76 #define DRM_IOCTL_VMW_UNREF_CONTEXT                             \
  77         DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_UNREF_CONTEXT,       \
  78                 struct drm_vmw_context_arg)
  79 #define DRM_IOCTL_VMW_CREATE_SURFACE                            \
  80         DRM_IOWR(DRM_COMMAND_BASE + DRM_VMW_CREATE_SURFACE,     \
  81                  union drm_vmw_surface_create_arg)
  82 #define DRM_IOCTL_VMW_UNREF_SURFACE                             \
  83         DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_UNREF_SURFACE,       \
  84                  struct drm_vmw_surface_arg)
  85 #define DRM_IOCTL_VMW_REF_SURFACE                               \
  86         DRM_IOWR(DRM_COMMAND_BASE + DRM_VMW_REF_SURFACE,        \
  87                  union drm_vmw_surface_reference_arg)
  88 #define DRM_IOCTL_VMW_EXECBUF                                   \
  89         DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_EXECBUF,             \
  90                 struct drm_vmw_execbuf_arg)
  91 #define DRM_IOCTL_VMW_GET_3D_CAP                                \
  92         DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_GET_3D_CAP,          \
  93                  struct drm_vmw_get_3d_cap_arg)
  94 #define DRM_IOCTL_VMW_FENCE_WAIT                                \
  95         DRM_IOWR(DRM_COMMAND_BASE + DRM_VMW_FENCE_WAIT,         \
  96                  struct drm_vmw_fence_wait_arg)
  97 #define DRM_IOCTL_VMW_FENCE_SIGNALED                            \
  98         DRM_IOWR(DRM_COMMAND_BASE + DRM_VMW_FENCE_SIGNALED,     \
  99                  struct drm_vmw_fence_signaled_arg)
 100 #define DRM_IOCTL_VMW_FENCE_UNREF                               \
 101         DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_FENCE_UNREF,         \
 102                  struct drm_vmw_fence_arg)
 103 #define DRM_IOCTL_VMW_FENCE_EVENT                               \
 104         DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_FENCE_EVENT,         \
 105                  struct drm_vmw_fence_event_arg)
 106 #define DRM_IOCTL_VMW_PRESENT                                   \
 107         DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_PRESENT,             \
 108                  struct drm_vmw_present_arg)
 109 #define DRM_IOCTL_VMW_PRESENT_READBACK                          \
 110         DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_PRESENT_READBACK,    \
 111                  struct drm_vmw_present_readback_arg)
 112 #define DRM_IOCTL_VMW_UPDATE_LAYOUT                             \
 113         DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_UPDATE_LAYOUT,       \
 114                  struct drm_vmw_update_layout_arg)
 115 #define DRM_IOCTL_VMW_CREATE_SHADER                             \
 116         DRM_IOWR(DRM_COMMAND_BASE + DRM_VMW_CREATE_SHADER,      \
 117                  struct drm_vmw_shader_create_arg)
 118 #define DRM_IOCTL_VMW_UNREF_SHADER                              \
 119         DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_UNREF_SHADER,        \
 120                  struct drm_vmw_shader_arg)
 121 #define DRM_IOCTL_VMW_GB_SURFACE_CREATE                         \
 122         DRM_IOWR(DRM_COMMAND_BASE + DRM_VMW_GB_SURFACE_CREATE,  \
 123                  union drm_vmw_gb_surface_create_arg)
 124 #define DRM_IOCTL_VMW_GB_SURFACE_REF                            \
 125         DRM_IOWR(DRM_COMMAND_BASE + DRM_VMW_GB_SURFACE_REF,     \
 126                  union drm_vmw_gb_surface_reference_arg)
 127 #define DRM_IOCTL_VMW_SYNCCPU                                   \
 128         DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_SYNCCPU,             \
 129                  struct drm_vmw_synccpu_arg)
 130
 131 /**
 132  * The core DRM version of this macro doesn't account for
 133  * DRM_COMMAND_BASE.
 134  */
 135
 136 #define VMW_IOCTL_DEF(ioctl, func, flags) \
 137   [DRM_IOCTL_NR(DRM_IOCTL_##ioctl) - DRM_COMMAND_BASE] = {DRM_##ioctl, flags, func, DRM_IOCTL_##ioctl}
 138
 139 /**
 140  * Ioctl definitions.
 141  */
 142
 143 static const struct drm_ioctl_desc vmw_ioctls[] = {
 144         VMW_IOCTL_DEF(VMW_GET_PARAM, vmw_getparam_ioctl,
 145                       DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
 146         VMW_IOCTL_DEF(VMW_ALLOC_DMABUF, vmw_dmabuf_alloc_ioctl,
 147                       DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
 148         VMW_IOCTL_DEF(VMW_UNREF_DMABUF, vmw_dmabuf_unref_ioctl,
 149                       DRM_UNLOCKED | DRM_RENDER_ALLOW),
 150         VMW_IOCTL_DEF(VMW_CURSOR_BYPASS,
 151                       vmw_kms_cursor_bypass_ioctl,
 152                       DRM_MASTER | DRM_CONTROL_ALLOW | DRM_UNLOCKED),
 153
 154         VMW_IOCTL_DEF(VMW_CONTROL_STREAM, vmw_overlay_ioctl,
 155                       DRM_MASTER | DRM_CONTROL_ALLOW | DRM_UNLOCKED),
 156         VMW_IOCTL_DEF(VMW_CLAIM_STREAM, vmw_stream_claim_ioctl,
 157                       DRM_MASTER | DRM_CONTROL_ALLOW | DRM_UNLOCKED),
 158         VMW_IOCTL_DEF(VMW_UNREF_STREAM, vmw_stream_unref_ioctl,
 159                       DRM_MASTER | DRM_CONTROL_ALLOW | DRM_UNLOCKED),
 160
 161         VMW_IOCTL_DEF(VMW_CREATE_CONTEXT, vmw_context_define_ioctl,
 162                       DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
 163         VMW_IOCTL_DEF(VMW_UNREF_CONTEXT, vmw_context_destroy_ioctl,
 164                       DRM_UNLOCKED | DRM_RENDER_ALLOW),
 165         VMW_IOCTL_DEF(VMW_CREATE_SURFACE, vmw_surface_define_ioctl,
 166                       DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
 167         VMW_IOCTL_DEF(VMW_UNREF_SURFACE, vmw_surface_destroy_ioctl,
 168                       DRM_UNLOCKED | DRM_RENDER_ALLOW),
 169         VMW_IOCTL_DEF(VMW_REF_SURFACE, vmw_surface_reference_ioctl,
 170                       DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
 171         VMW_IOCTL_DEF(VMW_EXECBUF, vmw_execbuf_ioctl,
 172                       DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
 173         VMW_IOCTL_DEF(VMW_FENCE_WAIT, vmw_fence_obj_wait_ioctl,
 174                       DRM_UNLOCKED | DRM_RENDER_ALLOW),
 175         VMW_IOCTL_DEF(VMW_FENCE_SIGNALED,
 176                       vmw_fence_obj_signaled_ioctl,
 177                       DRM_UNLOCKED | DRM_RENDER_ALLOW),
 178         VMW_IOCTL_DEF(VMW_FENCE_UNREF, vmw_fence_obj_unref_ioctl,
 179                       DRM_UNLOCKED | DRM_RENDER_ALLOW),
 180         VMW_IOCTL_DEF(VMW_FENCE_EVENT, vmw_fence_event_ioctl,
 181                       DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
 182         VMW_IOCTL_DEF(VMW_GET_3D_CAP, vmw_get_cap_3d_ioctl,
 183                       DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
 184
 185         /* these allow direct access to the framebuffers mark as master only */
 186         VMW_IOCTL_DEF(VMW_PRESENT, vmw_present_ioctl,
 187                       DRM_MASTER | DRM_AUTH | DRM_UNLOCKED),
 188         VMW_IOCTL_DEF(VMW_PRESENT_READBACK,
 189                       vmw_present_readback_ioctl,
 190                       DRM_MASTER | DRM_AUTH | DRM_UNLOCKED),
 191         VMW_IOCTL_DEF(VMW_UPDATE_LAYOUT,
 192                       vmw_kms_update_layout_ioctl,
 193                       DRM_MASTER | DRM_UNLOCKED),
 194         VMW_IOCTL_DEF(VMW_CREATE_SHADER,
 195                       vmw_shader_define_ioctl,
 196                       DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
 197         VMW_IOCTL_DEF(VMW_UNREF_SHADER,
 198                       vmw_shader_destroy_ioctl,
 199                       DRM_UNLOCKED | DRM_RENDER_ALLOW),
 200         VMW_IOCTL_DEF(VMW_GB_SURFACE_CREATE,
 201                       vmw_gb_surface_define_ioctl,
 202                       DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
 203         VMW_IOCTL_DEF(VMW_GB_SURFACE_REF,
 204                       vmw_gb_surface_reference_ioctl,
 205                       DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
 206         VMW_IOCTL_DEF(VMW_SYNCCPU,
 207                       vmw_user_dmabuf_synccpu_ioctl,
 208                       DRM_UNLOCKED | DRM_RENDER_ALLOW),
 209 };
 210
 211 static struct pci_device_id vmw_pci_id_list[] = {
 212         {0x15ad, 0x0405, PCI_ANY_ID, PCI_ANY_ID, 0, 0, VMWGFX_CHIP_SVGAII},
 213         {0, 0, 0}
 214 };
 215 MODULE_DEVICE_TABLE(pci, vmw_pci_id_list);
 216
 217 static int enable_fbdev = IS_ENABLED(CONFIG_DRM_VMWGFX_FBCON);
 218 static int vmw_force_iommu;
 219 static int vmw_restrict_iommu;
 220 static int vmw_force_coherent;
 221 static int vmw_restrict_dma_mask;
 222
 223 static int vmw_probe(struct pci_dev *, const struct pci_device_id *);
 224 static void vmw_master_init(struct vmw_master *);
 225 static int vmwgfx_pm_notifier(struct notifier_block *nb, unsigned long val,
 226                               void *ptr);
 227
 228 MODULE_PARM_DESC(enable_fbdev, "Enable vmwgfx fbdev");
 229 module_param_named(enable_fbdev, enable_fbdev, int, 0600);
 230 MODULE_PARM_DESC(force_dma_api, "Force using the DMA API for TTM pages");
 231 module_param_named(force_dma_api, vmw_force_iommu, int, 0600);
 232 MODULE_PARM_DESC(restrict_iommu, "Try to limit IOMMU usage for TTM pages");
 233 module_param_named(restrict_iommu, vmw_restrict_iommu, int, 0600);
 234 MODULE_PARM_DESC(force_coherent, "Force coherent TTM pages");
 235 module_param_named(force_coherent, vmw_force_coherent, int, 0600);
 236 MODULE_PARM_DESC(restrict_dma_mask, "Restrict DMA mask to 44 bits with IOMMU");
 237 module_param_named(restrict_dma_mask, vmw_restrict_dma_mask, int, 0600);
 238
 239
 240 static void vmw_print_capabilities(uint32_t capabilities)
 241 {
 242         DRM_INFO("Capabilities:\n");
 243         if (capabilities & SVGA_CAP_RECT_COPY)
 244                 DRM_INFO("  Rect copy.\n");
 245         if (capabilities & SVGA_CAP_CURSOR)
 246                 DRM_INFO("  Cursor.\n");
 247         if (capabilities & SVGA_CAP_CURSOR_BYPASS)
 248                 DRM_INFO("  Cursor bypass.\n");
 249         if (capabilities & SVGA_CAP_CURSOR_BYPASS_2)
 250                 DRM_INFO("  Cursor bypass 2.\n");
 251         if (capabilities & SVGA_CAP_8BIT_EMULATION)
 252                 DRM_INFO("  8bit emulation.\n");
 253         if (capabilities & SVGA_CAP_ALPHA_CURSOR)
 254                 DRM_INFO("  Alpha cursor.\n");
 255         if (capabilities & SVGA_CAP_3D)
 256                 DRM_INFO("  3D.\n");
 257         if (capabilities & SVGA_CAP_EXTENDED_FIFO)
 258                 DRM_INFO("  Extended Fifo.\n");
 259         if (capabilities & SVGA_CAP_MULTIMON)
 260                 DRM_INFO("  Multimon.\n");
 261         if (capabilities & SVGA_CAP_PITCHLOCK)
 262                 DRM_INFO("  Pitchlock.\n");
 263         if (capabilities & SVGA_CAP_IRQMASK)
 264                 DRM_INFO("  Irq mask.\n");
 265         if (capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)
 266                 DRM_INFO("  Display Topology.\n");
 267         if (capabilities & SVGA_CAP_GMR)
 268                 DRM_INFO("  GMR.\n");
 269         if (capabilities & SVGA_CAP_TRACES)
 270                 DRM_INFO("  Traces.\n");
 271         if (capabilities & SVGA_CAP_GMR2)
 272                 DRM_INFO("  GMR2.\n");
 273         if (capabilities & SVGA_CAP_SCREEN_OBJECT_2)
 274                 DRM_INFO("  Screen Object 2.\n");
 275         if (capabilities & SVGA_CAP_COMMAND_BUFFERS)
 276                 DRM_INFO("  Command Buffers.\n");
 277         if (capabilities & SVGA_CAP_CMD_BUFFERS_2)
 278                 DRM_INFO("  Command Buffers 2.\n");
 279         if (capabilities & SVGA_CAP_GBOBJECTS)
 280                 DRM_INFO("  Guest Backed Resources.\n");
 281 }
 282
 283 /**
 284  * vmw_dummy_query_bo_create - create a bo to hold a dummy query result
 285  *
 286  * @dev_priv: A device private structure.
 287  *
 288  * This function creates a small buffer object that holds the query
 289  * result for dummy queries emitted as query barriers.
 290  * The function will then map the first page and initialize a pending
 291  * occlusion query result structure, Finally it will unmap the buffer.
 292  * No interruptible waits are done within this function.
 293  *
 294  * Returns an error if bo creation or initialization fails.
 295  */
 296 static int vmw_dummy_query_bo_create(struct vmw_private *dev_priv)
 297 {
 298         int ret;
 299         struct ttm_buffer_object *bo;
 300         struct ttm_bo_kmap_obj map;
 301         volatile SVGA3dQueryResult *result;
 302         bool dummy;
 303
 304         /*
 305          * Create the bo as pinned, so that a tryreserve will
 306          * immediately succeed. This is because we're the only
 307          * user of the bo currently.
 308          */
 309         ret = ttm_bo_create(&dev_priv->bdev,
 310                             PAGE_SIZE,
 311                             ttm_bo_type_device,
 312                             &vmw_sys_ne_placement,
 313                             0, false, NULL,
 314                             &bo);
 315
 316         if (unlikely(ret != 0))
 317                 return ret;
 318
 319         ret = ttm_bo_reserve(bo, false, true, false, 0);
 320         BUG_ON(ret != 0);
 321
 322         ret = ttm_bo_kmap(bo, 0, 1, &map);
 323         if (likely(ret == 0)) {
 324                 result = ttm_kmap_obj_virtual(&map, &dummy);
 325                 result->totalSize = sizeof(*result);
 326                 result->state = SVGA3D_QUERYSTATE_PENDING;
 327                 result->result32 = 0xff;
 328                 ttm_bo_kunmap(&map);
 329         }
 330         vmw_bo_pin(bo, false);
 331         ttm_bo_unreserve(bo);
 332
 333         if (unlikely(ret != 0)) {
 334                 DRM_ERROR("Dummy query buffer map failed.\n");
 335                 ttm_bo_unref(&bo);
 336         } else
 337                 dev_priv->dummy_query_bo = bo;
 338
 339         return ret;
 340 }
 341
 342 static int vmw_request_device(struct vmw_private *dev_priv)
 343 {
 344         int ret;
 345
 346         ret = vmw_fifo_init(dev_priv, &dev_priv->fifo);
 347         if (unlikely(ret != 0)) {
 348                 DRM_ERROR("Unable to initialize FIFO.\n");
 349                 return ret;
 350         }
 351         vmw_fence_fifo_up(dev_priv->fman);
 352         if (dev_priv->has_mob) {
 353                 ret = vmw_otables_setup(dev_priv);
 354                 if (unlikely(ret != 0)) {
 355                         DRM_ERROR("Unable to initialize "
 356                                   "guest Memory OBjects.\n");
 357                         goto out_no_mob;
 358                 }
 359         }
 360         ret = vmw_dummy_query_bo_create(dev_priv);
 361         if (unlikely(ret != 0))
 362                 goto out_no_query_bo;
 363
 364         return 0;
 365
 366 out_no_query_bo:
 367         if (dev_priv->has_mob)
 368                 vmw_otables_takedown(dev_priv);
 369 out_no_mob:
 370         vmw_fence_fifo_down(dev_priv->fman);
 371         vmw_fifo_release(dev_priv, &dev_priv->fifo);
 372         return ret;
 373 }
 374
 375 static void vmw_release_device(struct vmw_private *dev_priv)
 376 {
 377         /*
 378          * Previous destructions should've released
 379          * the pinned bo.
 380          */
 381
 382         BUG_ON(dev_priv->pinned_bo != NULL);
 383
 384         ttm_bo_unref(&dev_priv->dummy_query_bo);
 385         if (dev_priv->has_mob)
 386                 vmw_otables_takedown(dev_priv);
 387         vmw_fence_fifo_down(dev_priv->fman);
 388         vmw_fifo_release(dev_priv, &dev_priv->fifo);
 389 }
 390
 391
 392 /**
 393  * Increase the 3d resource refcount.
 394  * If the count was prevously zero, initialize the fifo, switching to svga
 395  * mode. Note that the master holds a ref as well, and may request an
 396  * explicit switch to svga mode if fb is not running, using @unhide_svga.
 397  */
 398 int vmw_3d_resource_inc(struct vmw_private *dev_priv,
 399                         bool unhide_svga)
 400 {
 401         int ret = 0;
 402
 403         mutex_lock(&dev_priv->release_mutex);
 404         if (unlikely(dev_priv->num_3d_resources++ == 0)) {
 405                 ret = vmw_request_device(dev_priv);
 406                 if (unlikely(ret != 0))
 407                         --dev_priv->num_3d_resources;
 408         } else if (unhide_svga) {
 409                 mutex_lock(&dev_priv->hw_mutex);
 410                 vmw_write(dev_priv, SVGA_REG_ENABLE,
 411                           vmw_read(dev_priv, SVGA_REG_ENABLE) &
 412                           ~SVGA_REG_ENABLE_HIDE);
 413                 mutex_unlock(&dev_priv->hw_mutex);
 414         }
 415
 416         mutex_unlock(&dev_priv->release_mutex);
 417         return ret;
 418 }
 419
 420 /**
 421  * Decrease the 3d resource refcount.
 422  * If the count reaches zero, disable the fifo, switching to vga mode.
 423  * Note that the master holds a refcount as well, and may request an
 424  * explicit switch to vga mode when it releases its refcount to account
 425  * for the situation of an X server vt switch to VGA with 3d resources
 426  * active.
 427  */
 428 void vmw_3d_resource_dec(struct vmw_private *dev_priv,
 429                          bool hide_svga)
 430 {
 431         int32_t n3d;
 432
 433         mutex_lock(&dev_priv->release_mutex);
 434         if (unlikely(--dev_priv->num_3d_resources == 0))
 435                 vmw_release_device(dev_priv);
 436         else if (hide_svga) {
 437                 mutex_lock(&dev_priv->hw_mutex);
 438                 vmw_write(dev_priv, SVGA_REG_ENABLE,
 439                           vmw_read(dev_priv, SVGA_REG_ENABLE) |
 440                           SVGA_REG_ENABLE_HIDE);
 441                 mutex_unlock(&dev_priv->hw_mutex);
 442         }
 443
 444         n3d = (int32_t) dev_priv->num_3d_resources;
 445         mutex_unlock(&dev_priv->release_mutex);
 446
 447         BUG_ON(n3d < 0);
 448 }
 449
 450 /**
 451  * Sets the initial_[width|height] fields on the given vmw_private.
 452  *
 453  * It does so by reading SVGA_REG_[WIDTH|HEIGHT] regs and then
 454  * clamping the value to fb_max_[width|height] fields and the
 455  * VMW_MIN_INITIAL_[WIDTH|HEIGHT].
 456  * If the values appear to be invalid, set them to
 457  * VMW_MIN_INITIAL_[WIDTH|HEIGHT].
 458  */
 459 static void vmw_get_initial_size(struct vmw_private *dev_priv)
 460 {
 461         uint32_t width;
 462         uint32_t height;
 463
 464         width = vmw_read(dev_priv, SVGA_REG_WIDTH);
 465         height = vmw_read(dev_priv, SVGA_REG_HEIGHT);
 466
 467         width = max_t(uint32_t, width, VMW_MIN_INITIAL_WIDTH);
 468         height = max_t(uint32_t, height, VMW_MIN_INITIAL_HEIGHT);
 469
 470         if (width > dev_priv->fb_max_width ||
 471             height > dev_priv->fb_max_height) {
 472
 473                 /*
 474                  * This is a host error and shouldn't occur.
 475                  */
 476
 477                 width = VMW_MIN_INITIAL_WIDTH;
 478                 height = VMW_MIN_INITIAL_HEIGHT;
 479         }
 480
 481         dev_priv->initial_width = width;
 482         dev_priv->initial_height = height;
 483 }
 484
 485 /**
 486  * vmw_dma_select_mode - Determine how DMA mappings should be set up for this
 487  * system.
 488  *
 489  * @dev_priv: Pointer to a struct vmw_private
 490  *
 491  * This functions tries to determine the IOMMU setup and what actions
 492  * need to be taken by the driver to make system pages visible to the
 493  * device.
 494  * If this function decides that DMA is not possible, it returns -EINVAL.
 495  * The driver may then try to disable features of the device that require
 496  * DMA.
 497  */
 498 static int vmw_dma_select_mode(struct vmw_private *dev_priv)
 499 {
 500         static const char *names[vmw_dma_map_max] = {
 501                 [vmw_dma_phys] = "Using physical TTM page addresses.",
 502                 [vmw_dma_alloc_coherent] = "Using coherent TTM pages.",
 503                 [vmw_dma_map_populate] = "Keeping DMA mappings.",
 504                 [vmw_dma_map_bind] = "Giving up DMA mappings early."};
 505 #ifdef CONFIG_X86
 506         const struct dma_map_ops *dma_ops = get_dma_ops(dev_priv->dev->dev);
 507
 508 #ifdef CONFIG_INTEL_IOMMU
 509         if (intel_iommu_enabled) {
 510                 dev_priv->map_mode = vmw_dma_map_populate;
 511                 goto out_fixup;
 512         }
 513 #endif
 514
 515         if (!(vmw_force_iommu || vmw_force_coherent)) {
 516                 dev_priv->map_mode = vmw_dma_phys;
 517                 DRM_INFO("DMA map mode: %s\n", names[dev_priv->map_mode]);
 518                 return 0;
 519         }
 520
 521         dev_priv->map_mode = vmw_dma_map_populate;
 522
 523         if (dma_ops->sync_single_for_cpu)
 524                 dev_priv->map_mode = vmw_dma_alloc_coherent;
 525 #ifdef CONFIG_SWIOTLB
 526         if (swiotlb_nr_tbl() == 0)
 527                 dev_priv->map_mode = vmw_dma_map_populate;
 528 #endif
 529
 530 #ifdef CONFIG_INTEL_IOMMU
 531 out_fixup:
 532 #endif
 533         if (dev_priv->map_mode == vmw_dma_map_populate &&
 534             vmw_restrict_iommu)
 535                 dev_priv->map_mode = vmw_dma_map_bind;
 536
 537         if (vmw_force_coherent)
 538                 dev_priv->map_mode = vmw_dma_alloc_coherent;
 539
 540 #if !defined(CONFIG_SWIOTLB) && !defined(CONFIG_INTEL_IOMMU)
 541         /*
 542          * No coherent page pool
 543          */
 544         if (dev_priv->map_mode == vmw_dma_alloc_coherent)
 545                 return -EINVAL;
 546 #endif
 547
 548 #else /* CONFIG_X86 */
 549         dev_priv->map_mode = vmw_dma_map_populate;
 550 #endif /* CONFIG_X86 */
 551
 552         DRM_INFO("DMA map mode: %s\n", names[dev_priv->map_mode]);
 553
 554         return 0;
 555 }
 556
 557 /**
 558  * vmw_dma_masks - set required page- and dma masks
 559  *
 560  * @dev: Pointer to struct drm-device
 561  *
 562  * With 32-bit we can only handle 32 bit PFNs. Optionally set that
 563  * restriction also for 64-bit systems.
 564  */
 565 #ifdef CONFIG_INTEL_IOMMU
 566 static int vmw_dma_masks(struct vmw_private *dev_priv)
 567 {
 568         struct drm_device *dev = dev_priv->dev;
 569
 570         if (intel_iommu_enabled &&
 571             (sizeof(unsigned long) == 4 || vmw_restrict_dma_mask)) {
 572                 DRM_INFO("Restricting DMA addresses to 44 bits.\n");
 573                 return dma_set_mask(dev->dev, DMA_BIT_MASK(44));
 574         }
 575         return 0;
 576 }
 577 #else
 578 static int vmw_dma_masks(struct vmw_private *dev_priv)
 579 {
 580         return 0;
 581 }
 582 #endif
 583
 584 static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
 585 {
 586         struct vmw_private *dev_priv;
 587         int ret;
 588         uint32_t svga_id;
 589         enum vmw_res_type i;
 590         bool refuse_dma = false;
 591
 592         dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL);
 593         if (unlikely(dev_priv == NULL)) {
 594                 DRM_ERROR("Failed allocating a device private struct.\n");
 595                 return -ENOMEM;
 596         }
 597
 598         pci_set_master(dev->pdev);
 599
 600         dev_priv->dev = dev;
 601         dev_priv->vmw_chipset = chipset;
 602         dev_priv->last_read_seqno = (uint32_t) -100;
 603         mutex_init(&dev_priv->hw_mutex);
 604         mutex_init(&dev_priv->cmdbuf_mutex);
 605         mutex_init(&dev_priv->release_mutex);
 606         mutex_init(&dev_priv->binding_mutex);
 607         rwlock_init(&dev_priv->resource_lock);
 608         ttm_lock_init(&dev_priv->reservation_sem);
 609
 610         for (i = vmw_res_context; i < vmw_res_max; ++i) {
 611                 idr_init(&dev_priv->res_idr[i]);
 612                 INIT_LIST_HEAD(&dev_priv->res_lru[i]);
 613         }
 614
 615         mutex_init(&dev_priv->init_mutex);
 616         init_waitqueue_head(&dev_priv->fence_queue);
 617         init_waitqueue_head(&dev_priv->fifo_queue);
 618         dev_priv->fence_queue_waiters = 0;
 619         atomic_set(&dev_priv->fifo_queue_waiters, 0);
 620
 621         dev_priv->used_memory_size = 0;
 622
 623         dev_priv->io_start = pci_resource_start(dev->pdev, 0);
 624         dev_priv->vram_start = pci_resource_start(dev->pdev, 1);
 625         dev_priv->mmio_start = pci_resource_start(dev->pdev, 2);
 626
 627         dev_priv->enable_fb = enable_fbdev;
 628
 629         mutex_lock(&dev_priv->hw_mutex);
 630
 631         vmw_write(dev_priv, SVGA_REG_ID, SVGA_ID_2);
 632         svga_id = vmw_read(dev_priv, SVGA_REG_ID);
 633         if (svga_id != SVGA_ID_2) {
 634                 ret = -ENOSYS;
 635                 DRM_ERROR("Unsupported SVGA ID 0x%x\n", svga_id);
 636                 mutex_unlock(&dev_priv->hw_mutex);
 637                 goto out_err0;
 638         }
 639
 640         dev_priv->capabilities = vmw_read(dev_priv, SVGA_REG_CAPABILITIES);
 641         ret = vmw_dma_select_mode(dev_priv);
 642         if (unlikely(ret != 0)) {
 643                 DRM_INFO("Restricting capabilities due to IOMMU setup.\n");
 644                 refuse_dma = true;
 645         }
 646
 647         dev_priv->vram_size = vmw_read(dev_priv, SVGA_REG_VRAM_SIZE);
 648         dev_priv->mmio_size = vmw_read(dev_priv, SVGA_REG_MEM_SIZE);
 649         dev_priv->fb_max_width = vmw_read(dev_priv, SVGA_REG_MAX_WIDTH);
 650         dev_priv->fb_max_height = vmw_read(dev_priv, SVGA_REG_MAX_HEIGHT);
 651
 652         vmw_get_initial_size(dev_priv);
 653
 654         if (dev_priv->capabilities & SVGA_CAP_GMR2) {
 655                 dev_priv->max_gmr_ids =
 656                         vmw_read(dev_priv, SVGA_REG_GMR_MAX_IDS);
 657                 dev_priv->max_gmr_pages =
 658                         vmw_read(dev_priv, SVGA_REG_GMRS_MAX_PAGES);
 659                 dev_priv->memory_size =
 660                         vmw_read(dev_priv, SVGA_REG_MEMORY_SIZE);
 661                 dev_priv->memory_size -= dev_priv->vram_size;
 662         } else {
 663                 /*
 664                  * An arbitrary limit of 512MiB on surface
 665                  * memory. But all HWV8 hardware supports GMR2.
 666                  */
 667                 dev_priv->memory_size = 512*1024*1024;
 668         }
 669         dev_priv->max_mob_pages = 0;
 670         dev_priv->max_mob_size = 0;
 671         if (dev_priv->capabilities & SVGA_CAP_GBOBJECTS) {
 672                 uint64_t mem_size =
 673                         vmw_read(dev_priv,
 674                                  SVGA_REG_SUGGESTED_GBOBJECT_MEM_SIZE_KB);
 675
 676                 dev_priv->max_mob_pages = mem_size * 1024 / PAGE_SIZE;
 677                 dev_priv->prim_bb_mem =
 678                         vmw_read(dev_priv,
 679                                  SVGA_REG_MAX_PRIMARY_BOUNDING_BOX_MEM);
 680                 dev_priv->max_mob_size =
 681                         vmw_read(dev_priv, SVGA_REG_MOB_MAX_SIZE);
 682         } else
 683                 dev_priv->prim_bb_mem = dev_priv->vram_size;
 684
 685         ret = vmw_dma_masks(dev_priv);
 686         if (unlikely(ret != 0)) {
 687                 mutex_unlock(&dev_priv->hw_mutex);
 688                 goto out_err0;
 689         }
 690
 691         if (unlikely(dev_priv->prim_bb_mem < dev_priv->vram_size))
 692                 dev_priv->prim_bb_mem = dev_priv->vram_size;
 693
 694         mutex_unlock(&dev_priv->hw_mutex);
 695
 696         vmw_print_capabilities(dev_priv->capabilities);
 697
 698         if (dev_priv->capabilities & SVGA_CAP_GMR2) {
 699                 DRM_INFO("Max GMR ids is %u\n",
 700                          (unsigned)dev_priv->max_gmr_ids);
 701                 DRM_INFO("Max number of GMR pages is %u\n",
 702                          (unsigned)dev_priv->max_gmr_pages);
 703                 DRM_INFO("Max dedicated hypervisor surface memory is %u kiB\n",
 704                          (unsigned)dev_priv->memory_size / 1024);
 705         }
 706         DRM_INFO("Maximum display memory size is %u kiB\n",
 707                  dev_priv->prim_bb_mem / 1024);
 708         DRM_INFO("VRAM at 0x%08x size is %u kiB\n",
 709                  dev_priv->vram_start, dev_priv->vram_size / 1024);
 710         DRM_INFO("MMIO at 0x%08x size is %u kiB\n",
 711                  dev_priv->mmio_start, dev_priv->mmio_size / 1024);
 712
 713         ret = vmw_ttm_global_init(dev_priv);
 714         if (unlikely(ret != 0))
 715                 goto out_err0;
 716
 717
 718         vmw_master_init(&dev_priv->fbdev_master);
 719         ttm_lock_set_kill(&dev_priv->fbdev_master.lock, false, SIGTERM);
 720         dev_priv->active_master = &dev_priv->fbdev_master;
 721
 722
 723         ret = ttm_bo_device_init(&dev_priv->bdev,
 724                                  dev_priv->bo_global_ref.ref.object,
 725                                  &vmw_bo_driver,
 726                                  dev->anon_inode->i_mapping,
 727                                  VMWGFX_FILE_PAGE_OFFSET,
 728                                  false);
 729         if (unlikely(ret != 0)) {
 730                 DRM_ERROR("Failed initializing TTM buffer object driver.\n");
 731                 goto out_err1;
 732         }
 733
 734         ret = ttm_bo_init_mm(&dev_priv->bdev, TTM_PL_VRAM,
 735                              (dev_priv->vram_size >> PAGE_SHIFT));
 736         if (unlikely(ret != 0)) {
 737                 DRM_ERROR("Failed initializing memory manager for VRAM.\n");
 738                 goto out_err2;
 739         }
 740
 741         dev_priv->has_gmr = true;
 742         if (((dev_priv->capabilities & (SVGA_CAP_GMR | SVGA_CAP_GMR2)) == 0) ||
 743             refuse_dma || ttm_bo_init_mm(&dev_priv->bdev, VMW_PL_GMR,
 744                                          VMW_PL_GMR) != 0) {
 745                 DRM_INFO("No GMR memory available. "
 746                          "Graphics memory resources are very limited.\n");
 747                 dev_priv->has_gmr = false;
 748         }
 749
 750         if (dev_priv->capabilities & SVGA_CAP_GBOBJECTS) {
 751                 dev_priv->has_mob = true;
 752                 if (ttm_bo_init_mm(&dev_priv->bdev, VMW_PL_MOB,
 753                                    VMW_PL_MOB) != 0) {
 754                         DRM_INFO("No MOB memory available. "
 755                                  "3D will be disabled.\n");
 756                         dev_priv->has_mob = false;
 757                 }
 758         }
 759
 760         dev_priv->mmio_mtrr = arch_phys_wc_add(dev_priv->mmio_start,
 761                                                dev_priv->mmio_size);
 762
 763         dev_priv->mmio_virt = ioremap_wc(dev_priv->mmio_start,
 764                                          dev_priv->mmio_size);
 765
 766         if (unlikely(dev_priv->mmio_virt == NULL)) {
 767                 ret = -ENOMEM;
 768                 DRM_ERROR("Failed mapping MMIO.\n");
 769                 goto out_err3;
 770         }
 771
 772         /* Need mmio memory to check for fifo pitchlock cap. */
 773         if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY) &&
 774             !(dev_priv->capabilities & SVGA_CAP_PITCHLOCK) &&
 775             !vmw_fifo_have_pitchlock(dev_priv)) {
 776                 ret = -ENOSYS;
 777                 DRM_ERROR("Hardware has no pitchlock\n");
 778                 goto out_err4;
 779         }
 780
 781         dev_priv->tdev = ttm_object_device_init
 782                 (dev_priv->mem_global_ref.object, 12, &vmw_prime_dmabuf_ops);
 783
 784         if (unlikely(dev_priv->tdev == NULL)) {
 785                 DRM_ERROR("Unable to initialize TTM object management.\n");
 786                 ret = -ENOMEM;
 787                 goto out_err4;
 788         }
 789
 790         dev->dev_private = dev_priv;
 791
 792         ret = pci_request_regions(dev->pdev, "vmwgfx probe");
 793         dev_priv->stealth = (ret != 0);
 794         if (dev_priv->stealth) {
 795                 /**
 796                  * Request at least the mmio PCI resource.
 797                  */
 798
 799                 DRM_INFO("It appears like vesafb is loaded. "
 800                          "Ignore above error if any.\n");
 801                 ret = pci_request_region(dev->pdev, 2, "vmwgfx stealth probe");
 802                 if (unlikely(ret != 0)) {
 803                         DRM_ERROR("Failed reserving the SVGA MMIO resource.\n");
 804                         goto out_no_device;
 805                 }
 806         }
 807
 808         if (dev_priv->capabilities & SVGA_CAP_IRQMASK) {
 809                 ret = drm_irq_install(dev, dev->pdev->irq);
 810                 if (ret != 0) {
 811                         DRM_ERROR("Failed installing irq: %d\n", ret);
 812                         goto out_no_irq;
 813                 }
 814         }
 815
 816         dev_priv->fman = vmw_fence_manager_init(dev_priv);
 817         if (unlikely(dev_priv->fman == NULL)) {
 818                 ret = -ENOMEM;
 819                 goto out_no_fman;
 820         }
 821
 822         vmw_kms_save_vga(dev_priv);
 823
 824         /* Start kms and overlay systems, needs fifo. */
 825         ret = vmw_kms_init(dev_priv);
 826         if (unlikely(ret != 0))
 827                 goto out_no_kms;
 828         vmw_overlay_init(dev_priv);
 829
 830         if (dev_priv->enable_fb) {
 831                 ret = vmw_3d_resource_inc(dev_priv, true);
 832                 if (unlikely(ret != 0))
 833                         goto out_no_fifo;
 834                 vmw_fb_init(dev_priv);
 835         }
 836
 837         dev_priv->pm_nb.notifier_call = vmwgfx_pm_notifier;
 838         register_pm_notifier(&dev_priv->pm_nb);
 839
 840         return 0;
 841
 842 out_no_fifo:
 843         vmw_overlay_close(dev_priv);
 844         vmw_kms_close(dev_priv);
 845 out_no_kms:
 846         vmw_kms_restore_vga(dev_priv);
 847         vmw_fence_manager_takedown(dev_priv->fman);
 848 out_no_fman:
 849         if (dev_priv->capabilities & SVGA_CAP_IRQMASK)
 850                 drm_irq_uninstall(dev_priv->dev);
 851 out_no_irq:
 852         if (dev_priv->stealth)
 853                 pci_release_region(dev->pdev, 2);
 854         else
 855                 pci_release_regions(dev->pdev);
 856 out_no_device:
 857         ttm_object_device_release(&dev_priv->tdev);
 858 out_err4:
 859         iounmap(dev_priv->mmio_virt);
 860 out_err3:
 861         arch_phys_wc_del(dev_priv->mmio_mtrr);
 862         if (dev_priv->has_mob)
 863                 (void) ttm_bo_clean_mm(&dev_priv->bdev, VMW_PL_MOB);
 864         if (dev_priv->has_gmr)
 865                 (void) ttm_bo_clean_mm(&dev_priv->bdev, VMW_PL_GMR);
 866         (void)ttm_bo_clean_mm(&dev_priv->bdev, TTM_PL_VRAM);
 867 out_err2:
 868         (void)ttm_bo_device_release(&dev_priv->bdev);
 869 out_err1:
 870         vmw_ttm_global_release(dev_priv);
 871 out_err0:
 872         for (i = vmw_res_context; i < vmw_res_max; ++i)
 873                 idr_destroy(&dev_priv->res_idr[i]);
 874
 875         kfree(dev_priv);
 876         return ret;
 877 }
 878
 879 static int vmw_driver_unload(struct drm_device *dev)
 880 {
 881         struct vmw_private *dev_priv = vmw_priv(dev);
 882         enum vmw_res_type i;
 883
 884         unregister_pm_notifier(&dev_priv->pm_nb);
 885
 886         if (dev_priv->ctx.res_ht_initialized)
 887                 drm_ht_remove(&dev_priv->ctx.res_ht);
 888         if (dev_priv->ctx.cmd_bounce)
 889                 vfree(dev_priv->ctx.cmd_bounce);
 890         if (dev_priv->enable_fb) {
 891                 vmw_fb_close(dev_priv);
 892                 vmw_kms_restore_vga(dev_priv);
 893                 vmw_3d_resource_dec(dev_priv, false);
 894         }
 895         vmw_kms_close(dev_priv);
 896         vmw_overlay_close(dev_priv);
 897         vmw_fence_manager_takedown(dev_priv->fman);
 898         if (dev_priv->capabilities & SVGA_CAP_IRQMASK)
 899                 drm_irq_uninstall(dev_priv->dev);
 900         if (dev_priv->stealth)
 901                 pci_release_region(dev->pdev, 2);
 902         else
 903                 pci_release_regions(dev->pdev);
 904
 905         ttm_object_device_release(&dev_priv->tdev);
 906         iounmap(dev_priv->mmio_virt);
 907         arch_phys_wc_del(dev_priv->mmio_mtrr);
 908         if (dev_priv->has_mob)
 909                 (void) ttm_bo_clean_mm(&dev_priv->bdev, VMW_PL_MOB);
 910         if (dev_priv->has_gmr)
 911                 (void)ttm_bo_clean_mm(&dev_priv->bdev, VMW_PL_GMR);
 912         (void)ttm_bo_clean_mm(&dev_priv->bdev, TTM_PL_VRAM);
 913         (void)ttm_bo_device_release(&dev_priv->bdev);
 914         vmw_ttm_global_release(dev_priv);
 915
 916         for (i = vmw_res_context; i < vmw_res_max; ++i)
 917                 idr_destroy(&dev_priv->res_idr[i]);
 918
 919         kfree(dev_priv);
 920
 921         return 0;
 922 }
 923
 924 static void vmw_preclose(struct drm_device *dev,
 925                          struct drm_file *file_priv)
 926 {
 927         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
 928         struct vmw_private *dev_priv = vmw_priv(dev);
 929
 930         vmw_event_fence_fpriv_gone(dev_priv->fman, &vmw_fp->fence_events);
 931 }
 932
 933 static void vmw_postclose(struct drm_device *dev,
 934                          struct drm_file *file_priv)
 935 {
 936         struct vmw_fpriv *vmw_fp;
 937
 938         vmw_fp = vmw_fpriv(file_priv);
 939
 940         if (vmw_fp->locked_master) {
 941                 struct vmw_master *vmaster =
 942                         vmw_master(vmw_fp->locked_master);
 943
 944                 ttm_lock_set_kill(&vmaster->lock, true, SIGTERM);
 945                 ttm_vt_unlock(&vmaster->lock);
 946                 drm_master_put(&vmw_fp->locked_master);
 947         }
 948
 949         ttm_object_file_release(&vmw_fp->tfile);
 950         kfree(vmw_fp);
 951 }
 952
 953 static int vmw_driver_open(struct drm_device *dev, struct drm_file *file_priv)
 954 {
 955         struct vmw_private *dev_priv = vmw_priv(dev);
 956         struct vmw_fpriv *vmw_fp;
 957         int ret = -ENOMEM;
 958
 959         vmw_fp = kzalloc(sizeof(*vmw_fp), GFP_KERNEL);
 960         if (unlikely(vmw_fp == NULL))
 961                 return ret;
 962
 963         INIT_LIST_HEAD(&vmw_fp->fence_events);
 964         vmw_fp->tfile = ttm_object_file_init(dev_priv->tdev, 10);
 965         if (unlikely(vmw_fp->tfile == NULL))
 966                 goto out_no_tfile;
 967
 968         file_priv->driver_priv = vmw_fp;
 969
 970         return 0;
 971
 972 out_no_tfile:
 973         kfree(vmw_fp);
 974         return ret;
 975 }
 976
 977 static struct vmw_master *vmw_master_check(struct drm_device *dev,
 978                                            struct drm_file *file_priv,
 979                                            unsigned int flags)
 980 {
 981         int ret;
 982         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
 983         struct vmw_master *vmaster;
 984
 985         if (file_priv->minor->type != DRM_MINOR_LEGACY ||
 986             !(flags & DRM_AUTH))
 987                 return NULL;
 988
 989         ret = mutex_lock_interruptible(&dev->master_mutex);
 990         if (unlikely(ret != 0))
 991                 return ERR_PTR(-ERESTARTSYS);
 992
 993         if (file_priv->is_master) {
 994                 mutex_unlock(&dev->master_mutex);
 995                 return NULL;
 996         }
 997
 998         /*
 999          * Check if we were previously master, but now dropped.
1000          */
1001         if (vmw_fp->locked_master) {
1002                 mutex_unlock(&dev->master_mutex);
1003                 DRM_ERROR("Dropped master trying to access ioctl that "
1004                           "requires authentication.\n");
1005                 return ERR_PTR(-EACCES);
1006         }
1007         mutex_unlock(&dev->master_mutex);
1008
1009         /*
1010          * Taking the drm_global_mutex after the TTM lock might deadlock
1011          */
1012         if (!(flags & DRM_UNLOCKED)) {
1013                 DRM_ERROR("Refusing locked ioctl access.\n");
1014                 return ERR_PTR(-EDEADLK);
1015         }
1016
1017         /*
1018          * Take the TTM lock. Possibly sleep waiting for the authenticating
1019          * master to become master again, or for a SIGTERM if the
1020          * authenticating master exits.
1021          */
1022         vmaster = vmw_master(file_priv->master);
1023         ret = ttm_read_lock(&vmaster->lock, true);
1024         if (unlikely(ret != 0))
1025                 vmaster = ERR_PTR(ret);
1026
1027         return vmaster;
1028 }
1029
1030 static long vmw_generic_ioctl(struct file *filp, unsigned int cmd,
1031                               unsigned long arg,
1032                               long (*ioctl_func)(struct file *, unsigned int,
1033                                                  unsigned long))
1034 {
1035         struct drm_file *file_priv = filp->private_data;
1036         struct drm_device *dev = file_priv->minor->dev;
1037         unsigned int nr = DRM_IOCTL_NR(cmd);
1038         struct vmw_master *vmaster;
1039         unsigned int flags;
1040         long ret;
1041
1042         /*
1043          * Do extra checking on driver private ioctls.
1044          */
1045
1046         if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END)
1047             && (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
1048                 const struct drm_ioctl_desc *ioctl =
1049                         &vmw_ioctls[nr - DRM_COMMAND_BASE];
1050
1051                 if (unlikely(ioctl->cmd_drv != cmd)) {
1052                         DRM_ERROR("Invalid command format, ioctl %d\n",
1053                                   nr - DRM_COMMAND_BASE);
1054                         return -EINVAL;
1055                 }
1056                 flags = ioctl->flags;
1057         } else if (!drm_ioctl_flags(nr, &flags))
1058                 return -EINVAL;
1059
1060         vmaster = vmw_master_check(dev, file_priv, flags);
1061         if (unlikely(IS_ERR(vmaster))) {
1062                 DRM_INFO("IOCTL ERROR %d\n", nr);
1063                 return PTR_ERR(vmaster);
1064         }
1065
1066         ret = ioctl_func(filp, cmd, arg);
1067         if (vmaster)
1068                 ttm_read_unlock(&vmaster->lock);
1069
1070         return ret;
1071 }
1072
1073 static long vmw_unlocked_ioctl(struct file *filp, unsigned int cmd,
1074                                unsigned long arg)
1075 {
1076         return vmw_generic_ioctl(filp, cmd, arg, &drm_ioctl);
1077 }
1078
1079 #ifdef CONFIG_COMPAT
1080 static long vmw_compat_ioctl(struct file *filp, unsigned int cmd,
1081                              unsigned long arg)
1082 {
1083         return vmw_generic_ioctl(filp, cmd, arg, &drm_compat_ioctl);
1084 }
1085 #endif
1086
1087 static void vmw_lastclose(struct drm_device *dev)
1088 {
1089         struct drm_crtc *crtc;
1090         struct drm_mode_set set;
1091         int ret;
1092
1093         set.x = 0;
1094         set.y = 0;
1095         set.fb = NULL;
1096         set.mode = NULL;
1097         set.connectors = NULL;
1098         set.num_connectors = 0;
1099
1100         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1101                 set.crtc = crtc;
1102                 ret = drm_mode_set_config_internal(&set);
1103                 WARN_ON(ret != 0);
1104         }
1105
1106 }
1107
1108 static void vmw_master_init(struct vmw_master *vmaster)
1109 {
1110         ttm_lock_init(&vmaster->lock);
1111         INIT_LIST_HEAD(&vmaster->fb_surf);
1112         mutex_init(&vmaster->fb_surf_mutex);
1113 }
1114
1115 static int vmw_master_create(struct drm_device *dev,
1116                              struct drm_master *master)
1117 {
1118         struct vmw_master *vmaster;
1119
1120         vmaster = kzalloc(sizeof(*vmaster), GFP_KERNEL);
1121         if (unlikely(vmaster == NULL))
1122                 return -ENOMEM;
1123
1124         vmw_master_init(vmaster);
1125         ttm_lock_set_kill(&vmaster->lock, true, SIGTERM);
1126         master->driver_priv = vmaster;
1127
1128         return 0;
1129 }
1130
1131 static void vmw_master_destroy(struct drm_device *dev,
1132                                struct drm_master *master)
1133 {
1134         struct vmw_master *vmaster = vmw_master(master);
1135
1136         master->driver_priv = NULL;
1137         kfree(vmaster);
1138 }
1139
1140
1141 static int vmw_master_set(struct drm_device *dev,
1142                           struct drm_file *file_priv,
1143                           bool from_open)
1144 {
1145         struct vmw_private *dev_priv = vmw_priv(dev);
1146         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
1147         struct vmw_master *active = dev_priv->active_master;
1148         struct vmw_master *vmaster = vmw_master(file_priv->master);
1149         int ret = 0;
1150
1151         if (!dev_priv->enable_fb) {
1152                 ret = vmw_3d_resource_inc(dev_priv, true);
1153                 if (unlikely(ret != 0))
1154                         return ret;
1155                 vmw_kms_save_vga(dev_priv);
1156                 mutex_lock(&dev_priv->hw_mutex);
1157                 vmw_write(dev_priv, SVGA_REG_TRACES, 0);
1158                 mutex_unlock(&dev_priv->hw_mutex);
1159         }
1160
1161         if (active) {
1162                 BUG_ON(active != &dev_priv->fbdev_master);
1163                 ret = ttm_vt_lock(&active->lock, false, vmw_fp->tfile);
1164                 if (unlikely(ret != 0))
1165                         goto out_no_active_lock;
1166
1167                 ttm_lock_set_kill(&active->lock, true, SIGTERM);
1168                 ret = ttm_bo_evict_mm(&dev_priv->bdev, TTM_PL_VRAM);
1169                 if (unlikely(ret != 0)) {
1170                         DRM_ERROR("Unable to clean VRAM on "
1171                                   "master drop.\n");
1172                 }
1173
1174                 dev_priv->active_master = NULL;
1175         }
1176
1177         ttm_lock_set_kill(&vmaster->lock, false, SIGTERM);
1178         if (!from_open) {
1179                 ttm_vt_unlock(&vmaster->lock);
1180                 BUG_ON(vmw_fp->locked_master != file_priv->master);
1181                 drm_master_put(&vmw_fp->locked_master);
1182         }
1183
1184         dev_priv->active_master = vmaster;
1185
1186         return 0;
1187
1188 out_no_active_lock:
1189         if (!dev_priv->enable_fb) {
1190                 vmw_kms_restore_vga(dev_priv);
1191                 vmw_3d_resource_dec(dev_priv, true);
1192                 mutex_lock(&dev_priv->hw_mutex);
1193                 vmw_write(dev_priv, SVGA_REG_TRACES, 1);
1194                 mutex_unlock(&dev_priv->hw_mutex);
1195         }
1196         return ret;
1197 }
1198
1199 static void vmw_master_drop(struct drm_device *dev,
1200                             struct drm_file *file_priv,
1201                             bool from_release)
1202 {
1203         struct vmw_private *dev_priv = vmw_priv(dev);
1204         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
1205         struct vmw_master *vmaster = vmw_master(file_priv->master);
1206         int ret;
1207
1208         /**
1209          * Make sure the master doesn't disappear while we have
1210          * it locked.
1211          */
1212
1213         vmw_fp->locked_master = drm_master_get(file_priv->master);
1214         ret = ttm_vt_lock(&vmaster->lock, false, vmw_fp->tfile);
1215         if (unlikely((ret != 0))) {
1216                 DRM_ERROR("Unable to lock TTM at VT switch.\n");
1217                 drm_master_put(&vmw_fp->locked_master);
1218         }
1219
1220         ttm_lock_set_kill(&vmaster->lock, false, SIGTERM);
1221         vmw_execbuf_release_pinned_bo(dev_priv);
1222
1223         if (!dev_priv->enable_fb) {
1224                 ret = ttm_bo_evict_mm(&dev_priv->bdev, TTM_PL_VRAM);
1225                 if (unlikely(ret != 0))
1226                         DRM_ERROR("Unable to clean VRAM on master drop.\n");
1227                 vmw_kms_restore_vga(dev_priv);
1228                 vmw_3d_resource_dec(dev_priv, true);
1229                 mutex_lock(&dev_priv->hw_mutex);
1230                 vmw_write(dev_priv, SVGA_REG_TRACES, 1);
1231                 mutex_unlock(&dev_priv->hw_mutex);
1232         }
1233
1234         dev_priv->active_master = &dev_priv->fbdev_master;
1235         ttm_lock_set_kill(&dev_priv->fbdev_master.lock, false, SIGTERM);
1236         ttm_vt_unlock(&dev_priv->fbdev_master.lock);
1237
1238         if (dev_priv->enable_fb)
1239                 vmw_fb_on(dev_priv);
1240 }
1241
1242
1243 static void vmw_remove(struct pci_dev *pdev)
1244 {
1245         struct drm_device *dev = pci_get_drvdata(pdev);
1246
1247         drm_put_dev(dev);
1248 }
1249
1250 static int vmwgfx_pm_notifier(struct notifier_block *nb, unsigned long val,
1251                               void *ptr)
1252 {
1253         struct vmw_private *dev_priv =
1254                 container_of(nb, struct vmw_private, pm_nb);
1255
1256         switch (val) {
1257         case PM_HIBERNATION_PREPARE:
1258         case PM_SUSPEND_PREPARE:
1259                 ttm_suspend_lock(&dev_priv->reservation_sem);
1260
1261                 /**
1262                  * This empties VRAM and unbinds all GMR bindings.
1263                  * Buffer contents is moved to swappable memory.
1264                  */
1265                 vmw_execbuf_release_pinned_bo(dev_priv);
1266                 vmw_resource_evict_all(dev_priv);
1267                 ttm_bo_swapout_all(&dev_priv->bdev);
1268
1269                 break;
1270         case PM_POST_HIBERNATION:
1271         case PM_POST_SUSPEND:
1272         case PM_POST_RESTORE:
1273                 ttm_suspend_unlock(&dev_priv->reservation_sem);
1274
1275                 break;
1276         case PM_RESTORE_PREPARE:
1277                 break;
1278         default:
1279                 break;
1280         }
1281         return 0;
1282 }
1283
1284 /**
1285  * These might not be needed with the virtual SVGA device.
1286  */
1287
1288 static int vmw_pci_suspend(struct pci_dev *pdev, pm_message_t state)
1289 {
1290         struct drm_device *dev = pci_get_drvdata(pdev);
1291         struct vmw_private *dev_priv = vmw_priv(dev);
1292
1293         if (dev_priv->num_3d_resources != 0) {
1294                 DRM_INFO("Can't suspend or hibernate "
1295                          "while 3D resources are active.\n");
1296                 return -EBUSY;
1297         }
1298
1299         pci_save_state(pdev);
1300         pci_disable_device(pdev);
1301         pci_set_power_state(pdev, PCI_D3hot);
1302         return 0;
1303 }
1304
1305 static int vmw_pci_resume(struct pci_dev *pdev)
1306 {
1307         pci_set_power_state(pdev, PCI_D0);
1308         pci_restore_state(pdev);
1309         return pci_enable_device(pdev);
1310 }
1311
1312 static int vmw_pm_suspend(struct device *kdev)
1313 {
1314         struct pci_dev *pdev = to_pci_dev(kdev);
1315         struct pm_message dummy;
1316
1317         dummy.event = 0;
1318
1319         return vmw_pci_suspend(pdev, dummy);
1320 }
1321
1322 static int vmw_pm_resume(struct device *kdev)
1323 {
1324         struct pci_dev *pdev = to_pci_dev(kdev);
1325
1326         return vmw_pci_resume(pdev);
1327 }
1328
1329 static int vmw_pm_prepare(struct device *kdev)
1330 {
1331         struct pci_dev *pdev = to_pci_dev(kdev);
1332         struct drm_device *dev = pci_get_drvdata(pdev);
1333         struct vmw_private *dev_priv = vmw_priv(dev);
1334
1335         /**
1336          * Release 3d reference held by fbdev and potentially
1337          * stop fifo.
1338          */
1339         dev_priv->suspended = true;
1340         if (dev_priv->enable_fb)
1341                         vmw_3d_resource_dec(dev_priv, true);
1342
1343         if (dev_priv->num_3d_resources != 0) {
1344
1345                 DRM_INFO("Can't suspend or hibernate "
1346                          "while 3D resources are active.\n");
1347
1348                 if (dev_priv->enable_fb)
1349                         vmw_3d_resource_inc(dev_priv, true);
1350                 dev_priv->suspended = false;
1351                 return -EBUSY;
1352         }
1353
1354         return 0;
1355 }
1356
1357 static void vmw_pm_complete(struct device *kdev)
1358 {
1359         struct pci_dev *pdev = to_pci_dev(kdev);
1360         struct drm_device *dev = pci_get_drvdata(pdev);
1361         struct vmw_private *dev_priv = vmw_priv(dev);
1362
1363         mutex_lock(&dev_priv->hw_mutex);
1364         vmw_write(dev_priv, SVGA_REG_ID, SVGA_ID_2);
1365         (void) vmw_read(dev_priv, SVGA_REG_ID);
1366         mutex_unlock(&dev_priv->hw_mutex);
1367
1368         /**
1369          * Reclaim 3d reference held by fbdev and potentially
1370          * start fifo.
1371          */
1372         if (dev_priv->enable_fb)
1373                         vmw_3d_resource_inc(dev_priv, false);
1374
1375         dev_priv->suspended = false;
1376 }
1377
1378 static const struct dev_pm_ops vmw_pm_ops = {
1379         .prepare = vmw_pm_prepare,
1380         .complete = vmw_pm_complete,
1381         .suspend = vmw_pm_suspend,
1382         .resume = vmw_pm_resume,
1383 };
1384
1385 static const struct file_operations vmwgfx_driver_fops = {
1386         .owner = THIS_MODULE,
1387         .open = drm_open,
1388         .release = drm_release,
1389         .unlocked_ioctl = vmw_unlocked_ioctl,
1390         .mmap = vmw_mmap,
1391         .poll = vmw_fops_poll,
1392         .read = vmw_fops_read,
1393 #if defined(CONFIG_COMPAT)
1394         .compat_ioctl = vmw_compat_ioctl,
1395 #endif
1396         .llseek = noop_llseek,
1397 };
1398
1399 static struct drm_driver driver = {
1400         .driver_features = DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED |
1401         DRIVER_MODESET | DRIVER_PRIME | DRIVER_RENDER,
1402         .load = vmw_driver_load,
1403         .unload = vmw_driver_unload,
1404         .lastclose = vmw_lastclose,
1405         .irq_preinstall = vmw_irq_preinstall,
1406         .irq_postinstall = vmw_irq_postinstall,
1407         .irq_uninstall = vmw_irq_uninstall,
1408         .irq_handler = vmw_irq_handler,
1409         .get_vblank_counter = vmw_get_vblank_counter,
1410         .enable_vblank = vmw_enable_vblank,
1411         .disable_vblank = vmw_disable_vblank,
1412         .ioctls = vmw_ioctls,
1413         .num_ioctls = ARRAY_SIZE(vmw_ioctls),
1414         .master_create = vmw_master_create,
1415         .master_destroy = vmw_master_destroy,
1416         .master_set = vmw_master_set,
1417         .master_drop = vmw_master_drop,
1418         .open = vmw_driver_open,
1419         .preclose = vmw_preclose,
1420         .postclose = vmw_postclose,
1421
1422         .dumb_create = vmw_dumb_create,
1423         .dumb_map_offset = vmw_dumb_map_offset,
1424         .dumb_destroy = vmw_dumb_destroy,
1425
1426         .prime_fd_to_handle = vmw_prime_fd_to_handle,
1427         .prime_handle_to_fd = vmw_prime_handle_to_fd,
1428
1429         .fops = &vmwgfx_driver_fops,
1430         .name = VMWGFX_DRIVER_NAME,
1431         .desc = VMWGFX_DRIVER_DESC,
1432         .date = VMWGFX_DRIVER_DATE,
1433         .major = VMWGFX_DRIVER_MAJOR,
1434         .minor = VMWGFX_DRIVER_MINOR,
1435         .patchlevel = VMWGFX_DRIVER_PATCHLEVEL
1436 };
1437
1438 static struct pci_driver vmw_pci_driver = {
1439         .name = VMWGFX_DRIVER_NAME,
1440         .id_table = vmw_pci_id_list,
1441         .probe = vmw_probe,
1442         .remove = vmw_remove,
1443         .driver = {
1444                 .pm = &vmw_pm_ops
1445         }
1446 };
1447
1448 static int vmw_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1449 {
1450         return drm_get_pci_dev(pdev, ent, &driver);
1451 }
1452
1453 static int __init vmwgfx_init(void)
1454 {
1455         int ret;
1456         ret = drm_pci_init(&driver, &vmw_pci_driver);
1457         if (ret)
1458                 DRM_ERROR("Failed initializing DRM.\n");
1459         return ret;
1460 }
1461
1462 static void __exit vmwgfx_exit(void)
1463 {
1464         drm_pci_exit(&driver, &vmw_pci_driver);
1465 }
1466
1467 module_init(vmwgfx_init);
1468 module_exit(vmwgfx_exit);
1469
1470 MODULE_AUTHOR("VMware Inc. and others");
1471 MODULE_DESCRIPTION("Standalone drm driver for the VMware SVGA device");
1472 MODULE_LICENSE("GPL and additional rights");
1473 MODULE_VERSION(__stringify(VMWGFX_DRIVER_MAJOR) "."
1474                __stringify(VMWGFX_DRIVER_MINOR) "."
1475                __stringify(VMWGFX_DRIVER_PATCHLEVEL) "."
1476                "0");