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0001 // SPDX-License-Identifier: GPL-2.0 OR MIT
0002 /**************************************************************************
0003  *
0004  * Copyright 2011-2022 VMware, Inc., Palo Alto, CA., USA
0005  *
0006  * Permission is hereby granted, free of charge, to any person obtaining a
0007  * copy of this software and associated documentation files (the
0008  * "Software"), to deal in the Software without restriction, including
0009  * without limitation the rights to use, copy, modify, merge, publish,
0010  * distribute, sub license, and/or sell copies of the Software, and to
0011  * permit persons to whom the Software is furnished to do so, subject to
0012  * the following conditions:
0013  *
0014  * The above copyright notice and this permission notice (including the
0015  * next paragraph) shall be included in all copies or substantial portions
0016  * of the Software.
0017  *
0018  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0019  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0020  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
0021  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
0022  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
0023  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
0024  * USE OR OTHER DEALINGS IN THE SOFTWARE.
0025  *
0026  **************************************************************************/
0027 
0028 #include <drm/drm_atomic.h>
0029 #include <drm/drm_atomic_helper.h>
0030 #include <drm/drm_damage_helper.h>
0031 #include <drm/drm_fourcc.h>
0032 #include <drm/drm_plane_helper.h>
0033 #include <drm/drm_vblank.h>
0034 
0035 #include "vmwgfx_kms.h"
0036 
0037 #define vmw_crtc_to_sou(x) \
0038     container_of(x, struct vmw_screen_object_unit, base.crtc)
0039 #define vmw_encoder_to_sou(x) \
0040     container_of(x, struct vmw_screen_object_unit, base.encoder)
0041 #define vmw_connector_to_sou(x) \
0042     container_of(x, struct vmw_screen_object_unit, base.connector)
0043 
0044 /**
0045  * struct vmw_kms_sou_surface_dirty - Closure structure for
0046  * blit surface to screen command.
0047  * @base: The base type we derive from. Used by vmw_kms_helper_dirty().
0048  * @left: Left side of bounding box.
0049  * @right: Right side of bounding box.
0050  * @top: Top side of bounding box.
0051  * @bottom: Bottom side of bounding box.
0052  * @dst_x: Difference between source clip rects and framebuffer coordinates.
0053  * @dst_y: Difference between source clip rects and framebuffer coordinates.
0054  * @sid: Surface id of surface to copy from.
0055  */
0056 struct vmw_kms_sou_surface_dirty {
0057     struct vmw_kms_dirty base;
0058     s32 left, right, top, bottom;
0059     s32 dst_x, dst_y;
0060     u32 sid;
0061 };
0062 
0063 /*
0064  * SVGA commands that are used by this code. Please see the device headers
0065  * for explanation.
0066  */
0067 struct vmw_kms_sou_readback_blit {
0068     uint32 header;
0069     SVGAFifoCmdBlitScreenToGMRFB body;
0070 };
0071 
0072 struct vmw_kms_sou_bo_blit {
0073     uint32 header;
0074     SVGAFifoCmdBlitGMRFBToScreen body;
0075 };
0076 
0077 struct vmw_kms_sou_dirty_cmd {
0078     SVGA3dCmdHeader header;
0079     SVGA3dCmdBlitSurfaceToScreen body;
0080 };
0081 
0082 struct vmw_kms_sou_define_gmrfb {
0083     uint32_t header;
0084     SVGAFifoCmdDefineGMRFB body;
0085 };
0086 
0087 /*
0088  * Display unit using screen objects.
0089  */
0090 struct vmw_screen_object_unit {
0091     struct vmw_display_unit base;
0092 
0093     unsigned long buffer_size; /**< Size of allocated buffer */
0094     struct vmw_buffer_object *buffer; /**< Backing store buffer */
0095 
0096     bool defined;
0097 };
0098 
0099 static void vmw_sou_destroy(struct vmw_screen_object_unit *sou)
0100 {
0101     vmw_du_cleanup(&sou->base);
0102     kfree(sou);
0103 }
0104 
0105 
0106 /*
0107  * Screen Object Display Unit CRTC functions
0108  */
0109 
0110 static void vmw_sou_crtc_destroy(struct drm_crtc *crtc)
0111 {
0112     vmw_sou_destroy(vmw_crtc_to_sou(crtc));
0113 }
0114 
0115 /*
0116  * Send the fifo command to create a screen.
0117  */
0118 static int vmw_sou_fifo_create(struct vmw_private *dev_priv,
0119                    struct vmw_screen_object_unit *sou,
0120                    int x, int y,
0121                    struct drm_display_mode *mode)
0122 {
0123     size_t fifo_size;
0124 
0125     struct {
0126         struct {
0127             uint32_t cmdType;
0128         } header;
0129         SVGAScreenObject obj;
0130     } *cmd;
0131 
0132     BUG_ON(!sou->buffer);
0133 
0134     fifo_size = sizeof(*cmd);
0135     cmd = VMW_CMD_RESERVE(dev_priv, fifo_size);
0136     if (unlikely(cmd == NULL))
0137         return -ENOMEM;
0138 
0139     memset(cmd, 0, fifo_size);
0140     cmd->header.cmdType = SVGA_CMD_DEFINE_SCREEN;
0141     cmd->obj.structSize = sizeof(SVGAScreenObject);
0142     cmd->obj.id = sou->base.unit;
0143     cmd->obj.flags = SVGA_SCREEN_HAS_ROOT |
0144         (sou->base.unit == 0 ? SVGA_SCREEN_IS_PRIMARY : 0);
0145     cmd->obj.size.width = mode->hdisplay;
0146     cmd->obj.size.height = mode->vdisplay;
0147     cmd->obj.root.x = x;
0148     cmd->obj.root.y = y;
0149     sou->base.set_gui_x = cmd->obj.root.x;
0150     sou->base.set_gui_y = cmd->obj.root.y;
0151 
0152     /* Ok to assume that buffer is pinned in vram */
0153     vmw_bo_get_guest_ptr(&sou->buffer->base, &cmd->obj.backingStore.ptr);
0154     cmd->obj.backingStore.pitch = mode->hdisplay * 4;
0155 
0156     vmw_cmd_commit(dev_priv, fifo_size);
0157 
0158     sou->defined = true;
0159 
0160     return 0;
0161 }
0162 
0163 /*
0164  * Send the fifo command to destroy a screen.
0165  */
0166 static int vmw_sou_fifo_destroy(struct vmw_private *dev_priv,
0167                 struct vmw_screen_object_unit *sou)
0168 {
0169     size_t fifo_size;
0170     int ret;
0171 
0172     struct {
0173         struct {
0174             uint32_t cmdType;
0175         } header;
0176         SVGAFifoCmdDestroyScreen body;
0177     } *cmd;
0178 
0179     /* no need to do anything */
0180     if (unlikely(!sou->defined))
0181         return 0;
0182 
0183     fifo_size = sizeof(*cmd);
0184     cmd = VMW_CMD_RESERVE(dev_priv, fifo_size);
0185     if (unlikely(cmd == NULL))
0186         return -ENOMEM;
0187 
0188     memset(cmd, 0, fifo_size);
0189     cmd->header.cmdType = SVGA_CMD_DESTROY_SCREEN;
0190     cmd->body.screenId = sou->base.unit;
0191 
0192     vmw_cmd_commit(dev_priv, fifo_size);
0193 
0194     /* Force sync */
0195     ret = vmw_fallback_wait(dev_priv, false, true, 0, false, 3*HZ);
0196     if (unlikely(ret != 0))
0197         DRM_ERROR("Failed to sync with HW");
0198     else
0199         sou->defined = false;
0200 
0201     return ret;
0202 }
0203 
0204 /**
0205  * vmw_sou_crtc_mode_set_nofb - Create new screen
0206  *
0207  * @crtc: CRTC associated with the new screen
0208  *
0209  * This function creates/destroys a screen.  This function cannot fail, so if
0210  * somehow we run into a failure, just do the best we can to get out.
0211  */
0212 static void vmw_sou_crtc_mode_set_nofb(struct drm_crtc *crtc)
0213 {
0214     struct vmw_private *dev_priv;
0215     struct vmw_screen_object_unit *sou;
0216     struct vmw_framebuffer *vfb;
0217     struct drm_framebuffer *fb;
0218     struct drm_plane_state *ps;
0219     struct vmw_plane_state *vps;
0220     int ret;
0221 
0222     sou = vmw_crtc_to_sou(crtc);
0223     dev_priv = vmw_priv(crtc->dev);
0224     ps = crtc->primary->state;
0225     fb = ps->fb;
0226     vps = vmw_plane_state_to_vps(ps);
0227 
0228     vfb = (fb) ? vmw_framebuffer_to_vfb(fb) : NULL;
0229 
0230     if (sou->defined) {
0231         ret = vmw_sou_fifo_destroy(dev_priv, sou);
0232         if (ret) {
0233             DRM_ERROR("Failed to destroy Screen Object\n");
0234             return;
0235         }
0236     }
0237 
0238     if (vfb) {
0239         struct drm_connector_state *conn_state;
0240         struct vmw_connector_state *vmw_conn_state;
0241         int x, y;
0242 
0243         sou->buffer = vps->bo;
0244         sou->buffer_size = vps->bo_size;
0245 
0246         conn_state = sou->base.connector.state;
0247         vmw_conn_state = vmw_connector_state_to_vcs(conn_state);
0248 
0249         x = vmw_conn_state->gui_x;
0250         y = vmw_conn_state->gui_y;
0251 
0252         ret = vmw_sou_fifo_create(dev_priv, sou, x, y, &crtc->mode);
0253         if (ret)
0254             DRM_ERROR("Failed to define Screen Object %dx%d\n",
0255                   crtc->x, crtc->y);
0256 
0257     } else {
0258         sou->buffer = NULL;
0259         sou->buffer_size = 0;
0260     }
0261 }
0262 
0263 /**
0264  * vmw_sou_crtc_helper_prepare - Noop
0265  *
0266  * @crtc:  CRTC associated with the new screen
0267  *
0268  * Prepares the CRTC for a mode set, but we don't need to do anything here.
0269  */
0270 static void vmw_sou_crtc_helper_prepare(struct drm_crtc *crtc)
0271 {
0272 }
0273 
0274 /**
0275  * vmw_sou_crtc_atomic_enable - Noop
0276  *
0277  * @crtc: CRTC associated with the new screen
0278  * @state: Unused
0279  *
0280  * This is called after a mode set has been completed.
0281  */
0282 static void vmw_sou_crtc_atomic_enable(struct drm_crtc *crtc,
0283                        struct drm_atomic_state *state)
0284 {
0285 }
0286 
0287 /**
0288  * vmw_sou_crtc_atomic_disable - Turns off CRTC
0289  *
0290  * @crtc: CRTC to be turned off
0291  * @state: Unused
0292  */
0293 static void vmw_sou_crtc_atomic_disable(struct drm_crtc *crtc,
0294                     struct drm_atomic_state *state)
0295 {
0296     struct vmw_private *dev_priv;
0297     struct vmw_screen_object_unit *sou;
0298     int ret;
0299 
0300 
0301     if (!crtc) {
0302         DRM_ERROR("CRTC is NULL\n");
0303         return;
0304     }
0305 
0306     sou = vmw_crtc_to_sou(crtc);
0307     dev_priv = vmw_priv(crtc->dev);
0308 
0309     if (sou->defined) {
0310         ret = vmw_sou_fifo_destroy(dev_priv, sou);
0311         if (ret)
0312             DRM_ERROR("Failed to destroy Screen Object\n");
0313     }
0314 }
0315 
0316 static const struct drm_crtc_funcs vmw_screen_object_crtc_funcs = {
0317     .gamma_set = vmw_du_crtc_gamma_set,
0318     .destroy = vmw_sou_crtc_destroy,
0319     .reset = vmw_du_crtc_reset,
0320     .atomic_duplicate_state = vmw_du_crtc_duplicate_state,
0321     .atomic_destroy_state = vmw_du_crtc_destroy_state,
0322     .set_config = drm_atomic_helper_set_config,
0323     .page_flip = drm_atomic_helper_page_flip,
0324     .get_vblank_counter = vmw_get_vblank_counter,
0325     .enable_vblank = vmw_enable_vblank,
0326     .disable_vblank = vmw_disable_vblank,
0327 };
0328 
0329 /*
0330  * Screen Object Display Unit encoder functions
0331  */
0332 
0333 static void vmw_sou_encoder_destroy(struct drm_encoder *encoder)
0334 {
0335     vmw_sou_destroy(vmw_encoder_to_sou(encoder));
0336 }
0337 
0338 static const struct drm_encoder_funcs vmw_screen_object_encoder_funcs = {
0339     .destroy = vmw_sou_encoder_destroy,
0340 };
0341 
0342 /*
0343  * Screen Object Display Unit connector functions
0344  */
0345 
0346 static void vmw_sou_connector_destroy(struct drm_connector *connector)
0347 {
0348     vmw_sou_destroy(vmw_connector_to_sou(connector));
0349 }
0350 
0351 static const struct drm_connector_funcs vmw_sou_connector_funcs = {
0352     .dpms = vmw_du_connector_dpms,
0353     .detect = vmw_du_connector_detect,
0354     .fill_modes = vmw_du_connector_fill_modes,
0355     .destroy = vmw_sou_connector_destroy,
0356     .reset = vmw_du_connector_reset,
0357     .atomic_duplicate_state = vmw_du_connector_duplicate_state,
0358     .atomic_destroy_state = vmw_du_connector_destroy_state,
0359 };
0360 
0361 
0362 static const struct
0363 drm_connector_helper_funcs vmw_sou_connector_helper_funcs = {
0364 };
0365 
0366 
0367 
0368 /*
0369  * Screen Object Display Plane Functions
0370  */
0371 
0372 /**
0373  * vmw_sou_primary_plane_cleanup_fb - Frees sou backing buffer
0374  *
0375  * @plane:  display plane
0376  * @old_state: Contains the FB to clean up
0377  *
0378  * Unpins the display surface
0379  *
0380  * Returns 0 on success
0381  */
0382 static void
0383 vmw_sou_primary_plane_cleanup_fb(struct drm_plane *plane,
0384                  struct drm_plane_state *old_state)
0385 {
0386     struct vmw_plane_state *vps = vmw_plane_state_to_vps(old_state);
0387     struct drm_crtc *crtc = plane->state->crtc ?
0388         plane->state->crtc : old_state->crtc;
0389 
0390     if (vps->bo)
0391         vmw_bo_unpin(vmw_priv(crtc->dev), vps->bo, false);
0392     vmw_bo_unreference(&vps->bo);
0393     vps->bo_size = 0;
0394 
0395     vmw_du_plane_cleanup_fb(plane, old_state);
0396 }
0397 
0398 
0399 /**
0400  * vmw_sou_primary_plane_prepare_fb - allocate backing buffer
0401  *
0402  * @plane:  display plane
0403  * @new_state: info on the new plane state, including the FB
0404  *
0405  * The SOU backing buffer is our equivalent of the display plane.
0406  *
0407  * Returns 0 on success
0408  */
0409 static int
0410 vmw_sou_primary_plane_prepare_fb(struct drm_plane *plane,
0411                  struct drm_plane_state *new_state)
0412 {
0413     struct drm_framebuffer *new_fb = new_state->fb;
0414     struct drm_crtc *crtc = plane->state->crtc ?: new_state->crtc;
0415     struct vmw_plane_state *vps = vmw_plane_state_to_vps(new_state);
0416     struct vmw_private *dev_priv;
0417     size_t size;
0418     int ret;
0419 
0420 
0421     if (!new_fb) {
0422         vmw_bo_unreference(&vps->bo);
0423         vps->bo_size = 0;
0424 
0425         return 0;
0426     }
0427 
0428     size = new_state->crtc_w * new_state->crtc_h * 4;
0429     dev_priv = vmw_priv(crtc->dev);
0430 
0431     if (vps->bo) {
0432         if (vps->bo_size == size) {
0433             /*
0434              * Note that this might temporarily up the pin-count
0435              * to 2, until cleanup_fb() is called.
0436              */
0437             return vmw_bo_pin_in_vram(dev_priv, vps->bo,
0438                               true);
0439         }
0440 
0441         vmw_bo_unreference(&vps->bo);
0442         vps->bo_size = 0;
0443     }
0444 
0445     vmw_svga_enable(dev_priv);
0446 
0447     /* After we have alloced the backing store might not be able to
0448      * resume the overlays, this is preferred to failing to alloc.
0449      */
0450     vmw_overlay_pause_all(dev_priv);
0451     ret = vmw_bo_create(dev_priv, size,
0452                 &vmw_vram_placement,
0453                 false, true, &vmw_bo_bo_free, &vps->bo);
0454     vmw_overlay_resume_all(dev_priv);
0455     if (ret) {
0456         vps->bo = NULL; /* vmw_bo_init frees on error */
0457         return ret;
0458     }
0459 
0460     vps->bo_size = size;
0461 
0462     /*
0463      * TTM already thinks the buffer is pinned, but make sure the
0464      * pin_count is upped.
0465      */
0466     return vmw_bo_pin_in_vram(dev_priv, vps->bo, true);
0467 }
0468 
0469 static uint32_t vmw_sou_bo_fifo_size(struct vmw_du_update_plane *update,
0470                      uint32_t num_hits)
0471 {
0472     return sizeof(struct vmw_kms_sou_define_gmrfb) +
0473         sizeof(struct vmw_kms_sou_bo_blit) * num_hits;
0474 }
0475 
0476 static uint32_t vmw_sou_bo_define_gmrfb(struct vmw_du_update_plane *update,
0477                     void *cmd)
0478 {
0479     struct vmw_framebuffer_bo *vfbbo =
0480         container_of(update->vfb, typeof(*vfbbo), base);
0481     struct vmw_kms_sou_define_gmrfb *gmr = cmd;
0482     int depth = update->vfb->base.format->depth;
0483 
0484     /* Emulate RGBA support, contrary to svga_reg.h this is not
0485      * supported by hosts. This is only a problem if we are reading
0486      * this value later and expecting what we uploaded back.
0487      */
0488     if (depth == 32)
0489         depth = 24;
0490 
0491     gmr->header = SVGA_CMD_DEFINE_GMRFB;
0492 
0493     gmr->body.format.bitsPerPixel = update->vfb->base.format->cpp[0] * 8;
0494     gmr->body.format.colorDepth = depth;
0495     gmr->body.format.reserved = 0;
0496     gmr->body.bytesPerLine = update->vfb->base.pitches[0];
0497     vmw_bo_get_guest_ptr(&vfbbo->buffer->base, &gmr->body.ptr);
0498 
0499     return sizeof(*gmr);
0500 }
0501 
0502 static uint32_t vmw_sou_bo_populate_clip(struct vmw_du_update_plane  *update,
0503                      void *cmd, struct drm_rect *clip,
0504                      uint32_t fb_x, uint32_t fb_y)
0505 {
0506     struct vmw_kms_sou_bo_blit *blit = cmd;
0507 
0508     blit->header = SVGA_CMD_BLIT_GMRFB_TO_SCREEN;
0509     blit->body.destScreenId = update->du->unit;
0510     blit->body.srcOrigin.x = fb_x;
0511     blit->body.srcOrigin.y = fb_y;
0512     blit->body.destRect.left = clip->x1;
0513     blit->body.destRect.top = clip->y1;
0514     blit->body.destRect.right = clip->x2;
0515     blit->body.destRect.bottom = clip->y2;
0516 
0517     return sizeof(*blit);
0518 }
0519 
0520 static uint32_t vmw_stud_bo_post_clip(struct vmw_du_update_plane  *update,
0521                       void *cmd, struct drm_rect *bb)
0522 {
0523     return 0;
0524 }
0525 
0526 /**
0527  * vmw_sou_plane_update_bo - Update display unit for bo backed fb.
0528  * @dev_priv: Device private.
0529  * @plane: Plane state.
0530  * @old_state: Old plane state.
0531  * @vfb: Framebuffer which is blitted to display unit.
0532  * @out_fence: If non-NULL, will return a ref-counted pointer to vmw_fence_obj.
0533  *             The returned fence pointer may be NULL in which case the device
0534  *             has already synchronized.
0535  *
0536  * Return: 0 on success or a negative error code on failure.
0537  */
0538 static int vmw_sou_plane_update_bo(struct vmw_private *dev_priv,
0539                    struct drm_plane *plane,
0540                    struct drm_plane_state *old_state,
0541                    struct vmw_framebuffer *vfb,
0542                    struct vmw_fence_obj **out_fence)
0543 {
0544     struct vmw_du_update_plane_buffer bo_update;
0545 
0546     memset(&bo_update, 0, sizeof(struct vmw_du_update_plane_buffer));
0547     bo_update.base.plane = plane;
0548     bo_update.base.old_state = old_state;
0549     bo_update.base.dev_priv = dev_priv;
0550     bo_update.base.du = vmw_crtc_to_du(plane->state->crtc);
0551     bo_update.base.vfb = vfb;
0552     bo_update.base.out_fence = out_fence;
0553     bo_update.base.mutex = NULL;
0554     bo_update.base.cpu_blit = false;
0555     bo_update.base.intr = true;
0556 
0557     bo_update.base.calc_fifo_size = vmw_sou_bo_fifo_size;
0558     bo_update.base.post_prepare = vmw_sou_bo_define_gmrfb;
0559     bo_update.base.clip = vmw_sou_bo_populate_clip;
0560     bo_update.base.post_clip = vmw_stud_bo_post_clip;
0561 
0562     return vmw_du_helper_plane_update(&bo_update.base);
0563 }
0564 
0565 static uint32_t vmw_sou_surface_fifo_size(struct vmw_du_update_plane *update,
0566                       uint32_t num_hits)
0567 {
0568     return sizeof(struct vmw_kms_sou_dirty_cmd) + sizeof(SVGASignedRect) *
0569         num_hits;
0570 }
0571 
0572 static uint32_t vmw_sou_surface_post_prepare(struct vmw_du_update_plane *update,
0573                          void *cmd)
0574 {
0575     struct vmw_du_update_plane_surface *srf_update;
0576 
0577     srf_update = container_of(update, typeof(*srf_update), base);
0578 
0579     /*
0580      * SOU SVGA_3D_CMD_BLIT_SURFACE_TO_SCREEN is special in the sense that
0581      * its bounding box is filled before iterating over all the clips. So
0582      * store the FIFO start address and revisit to fill the details.
0583      */
0584     srf_update->cmd_start = cmd;
0585 
0586     return 0;
0587 }
0588 
0589 static uint32_t vmw_sou_surface_pre_clip(struct vmw_du_update_plane *update,
0590                      void *cmd, uint32_t num_hits)
0591 {
0592     struct vmw_kms_sou_dirty_cmd *blit = cmd;
0593     struct vmw_framebuffer_surface *vfbs;
0594 
0595     vfbs = container_of(update->vfb, typeof(*vfbs), base);
0596 
0597     blit->header.id = SVGA_3D_CMD_BLIT_SURFACE_TO_SCREEN;
0598     blit->header.size = sizeof(blit->body) + sizeof(SVGASignedRect) *
0599         num_hits;
0600 
0601     blit->body.srcImage.sid = vfbs->surface->res.id;
0602     blit->body.destScreenId = update->du->unit;
0603 
0604     /* Update the source and destination bounding box later in post_clip */
0605     blit->body.srcRect.left = 0;
0606     blit->body.srcRect.top = 0;
0607     blit->body.srcRect.right = 0;
0608     blit->body.srcRect.bottom = 0;
0609 
0610     blit->body.destRect.left = 0;
0611     blit->body.destRect.top = 0;
0612     blit->body.destRect.right = 0;
0613     blit->body.destRect.bottom = 0;
0614 
0615     return sizeof(*blit);
0616 }
0617 
0618 static uint32_t vmw_sou_surface_clip_rect(struct vmw_du_update_plane *update,
0619                       void *cmd, struct drm_rect *clip,
0620                       uint32_t src_x, uint32_t src_y)
0621 {
0622     SVGASignedRect *rect = cmd;
0623 
0624     /*
0625      * rects are relative to dest bounding box rect on screen object, so
0626      * translate to it later in post_clip
0627      */
0628     rect->left = clip->x1;
0629     rect->top = clip->y1;
0630     rect->right = clip->x2;
0631     rect->bottom = clip->y2;
0632 
0633     return sizeof(*rect);
0634 }
0635 
0636 static uint32_t vmw_sou_surface_post_clip(struct vmw_du_update_plane *update,
0637                       void *cmd, struct drm_rect *bb)
0638 {
0639     struct vmw_du_update_plane_surface *srf_update;
0640     struct drm_plane_state *state = update->plane->state;
0641     struct drm_rect src_bb;
0642     struct vmw_kms_sou_dirty_cmd *blit;
0643     SVGASignedRect *rect;
0644     uint32_t num_hits;
0645     int translate_src_x;
0646     int translate_src_y;
0647     int i;
0648 
0649     srf_update = container_of(update, typeof(*srf_update), base);
0650 
0651     blit = srf_update->cmd_start;
0652     rect = (SVGASignedRect *)&blit[1];
0653 
0654     num_hits = (blit->header.size - sizeof(blit->body))/
0655         sizeof(SVGASignedRect);
0656 
0657     src_bb = *bb;
0658 
0659     /* To translate bb back to fb src coord */
0660     translate_src_x = (state->src_x >> 16) - state->crtc_x;
0661     translate_src_y = (state->src_y >> 16) - state->crtc_y;
0662 
0663     drm_rect_translate(&src_bb, translate_src_x, translate_src_y);
0664 
0665     blit->body.srcRect.left = src_bb.x1;
0666     blit->body.srcRect.top = src_bb.y1;
0667     blit->body.srcRect.right = src_bb.x2;
0668     blit->body.srcRect.bottom = src_bb.y2;
0669 
0670     blit->body.destRect.left = bb->x1;
0671     blit->body.destRect.top = bb->y1;
0672     blit->body.destRect.right = bb->x2;
0673     blit->body.destRect.bottom = bb->y2;
0674 
0675     /* rects are relative to dest bb rect */
0676     for (i = 0; i < num_hits; i++) {
0677         rect->left -= bb->x1;
0678         rect->top -= bb->y1;
0679         rect->right -= bb->x1;
0680         rect->bottom -= bb->y1;
0681         rect++;
0682     }
0683 
0684     return 0;
0685 }
0686 
0687 /**
0688  * vmw_sou_plane_update_surface - Update display unit for surface backed fb.
0689  * @dev_priv: Device private.
0690  * @plane: Plane state.
0691  * @old_state: Old plane state.
0692  * @vfb: Framebuffer which is blitted to display unit
0693  * @out_fence: If non-NULL, will return a ref-counted pointer to vmw_fence_obj.
0694  *             The returned fence pointer may be NULL in which case the device
0695  *             has already synchronized.
0696  *
0697  * Return: 0 on success or a negative error code on failure.
0698  */
0699 static int vmw_sou_plane_update_surface(struct vmw_private *dev_priv,
0700                     struct drm_plane *plane,
0701                     struct drm_plane_state *old_state,
0702                     struct vmw_framebuffer *vfb,
0703                     struct vmw_fence_obj **out_fence)
0704 {
0705     struct vmw_du_update_plane_surface srf_update;
0706 
0707     memset(&srf_update, 0, sizeof(struct vmw_du_update_plane_surface));
0708     srf_update.base.plane = plane;
0709     srf_update.base.old_state = old_state;
0710     srf_update.base.dev_priv = dev_priv;
0711     srf_update.base.du = vmw_crtc_to_du(plane->state->crtc);
0712     srf_update.base.vfb = vfb;
0713     srf_update.base.out_fence = out_fence;
0714     srf_update.base.mutex = &dev_priv->cmdbuf_mutex;
0715     srf_update.base.cpu_blit = false;
0716     srf_update.base.intr = true;
0717 
0718     srf_update.base.calc_fifo_size = vmw_sou_surface_fifo_size;
0719     srf_update.base.post_prepare = vmw_sou_surface_post_prepare;
0720     srf_update.base.pre_clip = vmw_sou_surface_pre_clip;
0721     srf_update.base.clip = vmw_sou_surface_clip_rect;
0722     srf_update.base.post_clip = vmw_sou_surface_post_clip;
0723 
0724     return vmw_du_helper_plane_update(&srf_update.base);
0725 }
0726 
0727 static void
0728 vmw_sou_primary_plane_atomic_update(struct drm_plane *plane,
0729                     struct drm_atomic_state *state)
0730 {
0731     struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, plane);
0732     struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane);
0733     struct drm_crtc *crtc = new_state->crtc;
0734     struct drm_pending_vblank_event *event = NULL;
0735     struct vmw_fence_obj *fence = NULL;
0736     int ret;
0737 
0738     /* In case of device error, maintain consistent atomic state */
0739     if (crtc && new_state->fb) {
0740         struct vmw_private *dev_priv = vmw_priv(crtc->dev);
0741         struct vmw_framebuffer *vfb =
0742             vmw_framebuffer_to_vfb(new_state->fb);
0743 
0744         if (vfb->bo)
0745             ret = vmw_sou_plane_update_bo(dev_priv, plane,
0746                               old_state, vfb, &fence);
0747         else
0748             ret = vmw_sou_plane_update_surface(dev_priv, plane,
0749                                old_state, vfb,
0750                                &fence);
0751         if (ret != 0)
0752             DRM_ERROR("Failed to update screen.\n");
0753     } else {
0754         /* Do nothing when fb and crtc is NULL (blank crtc) */
0755         return;
0756     }
0757 
0758     /* For error case vblank event is send from vmw_du_crtc_atomic_flush */
0759     event = crtc->state->event;
0760     if (event && fence) {
0761         struct drm_file *file_priv = event->base.file_priv;
0762 
0763         ret = vmw_event_fence_action_queue(file_priv,
0764                            fence,
0765                            &event->base,
0766                            &event->event.vbl.tv_sec,
0767                            &event->event.vbl.tv_usec,
0768                            true);
0769 
0770         if (unlikely(ret != 0))
0771             DRM_ERROR("Failed to queue event on fence.\n");
0772         else
0773             crtc->state->event = NULL;
0774     }
0775 
0776     if (fence)
0777         vmw_fence_obj_unreference(&fence);
0778 }
0779 
0780 
0781 static const struct drm_plane_funcs vmw_sou_plane_funcs = {
0782     .update_plane = drm_atomic_helper_update_plane,
0783     .disable_plane = drm_atomic_helper_disable_plane,
0784     .destroy = vmw_du_primary_plane_destroy,
0785     .reset = vmw_du_plane_reset,
0786     .atomic_duplicate_state = vmw_du_plane_duplicate_state,
0787     .atomic_destroy_state = vmw_du_plane_destroy_state,
0788 };
0789 
0790 static const struct drm_plane_funcs vmw_sou_cursor_funcs = {
0791     .update_plane = drm_atomic_helper_update_plane,
0792     .disable_plane = drm_atomic_helper_disable_plane,
0793     .destroy = vmw_du_cursor_plane_destroy,
0794     .reset = vmw_du_plane_reset,
0795     .atomic_duplicate_state = vmw_du_plane_duplicate_state,
0796     .atomic_destroy_state = vmw_du_plane_destroy_state,
0797 };
0798 
0799 /*
0800  * Atomic Helpers
0801  */
0802 static const struct
0803 drm_plane_helper_funcs vmw_sou_cursor_plane_helper_funcs = {
0804     .atomic_check = vmw_du_cursor_plane_atomic_check,
0805     .atomic_update = vmw_du_cursor_plane_atomic_update,
0806     .prepare_fb = vmw_du_cursor_plane_prepare_fb,
0807     .cleanup_fb = vmw_du_cursor_plane_cleanup_fb,
0808 };
0809 
0810 static const struct
0811 drm_plane_helper_funcs vmw_sou_primary_plane_helper_funcs = {
0812     .atomic_check = vmw_du_primary_plane_atomic_check,
0813     .atomic_update = vmw_sou_primary_plane_atomic_update,
0814     .prepare_fb = vmw_sou_primary_plane_prepare_fb,
0815     .cleanup_fb = vmw_sou_primary_plane_cleanup_fb,
0816 };
0817 
0818 static const struct drm_crtc_helper_funcs vmw_sou_crtc_helper_funcs = {
0819     .prepare = vmw_sou_crtc_helper_prepare,
0820     .mode_set_nofb = vmw_sou_crtc_mode_set_nofb,
0821     .atomic_check = vmw_du_crtc_atomic_check,
0822     .atomic_begin = vmw_du_crtc_atomic_begin,
0823     .atomic_flush = vmw_du_crtc_atomic_flush,
0824     .atomic_enable = vmw_sou_crtc_atomic_enable,
0825     .atomic_disable = vmw_sou_crtc_atomic_disable,
0826 };
0827 
0828 
0829 static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
0830 {
0831     struct vmw_screen_object_unit *sou;
0832     struct drm_device *dev = &dev_priv->drm;
0833     struct drm_connector *connector;
0834     struct drm_encoder *encoder;
0835     struct drm_plane *primary;
0836     struct vmw_cursor_plane *cursor;
0837     struct drm_crtc *crtc;
0838     int ret;
0839 
0840     sou = kzalloc(sizeof(*sou), GFP_KERNEL);
0841     if (!sou)
0842         return -ENOMEM;
0843 
0844     sou->base.unit = unit;
0845     crtc = &sou->base.crtc;
0846     encoder = &sou->base.encoder;
0847     connector = &sou->base.connector;
0848     primary = &sou->base.primary;
0849     cursor = &sou->base.cursor;
0850 
0851     sou->base.pref_active = (unit == 0);
0852     sou->base.pref_width = dev_priv->initial_width;
0853     sou->base.pref_height = dev_priv->initial_height;
0854     sou->base.pref_mode = NULL;
0855 
0856     /*
0857      * Remove this after enabling atomic because property values can
0858      * only exist in a state object
0859      */
0860     sou->base.is_implicit = false;
0861 
0862     /* Initialize primary plane */
0863     ret = drm_universal_plane_init(dev, primary,
0864                        0, &vmw_sou_plane_funcs,
0865                        vmw_primary_plane_formats,
0866                        ARRAY_SIZE(vmw_primary_plane_formats),
0867                        NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
0868     if (ret) {
0869         DRM_ERROR("Failed to initialize primary plane");
0870         goto err_free;
0871     }
0872 
0873     drm_plane_helper_add(primary, &vmw_sou_primary_plane_helper_funcs);
0874     drm_plane_enable_fb_damage_clips(primary);
0875 
0876     /* Initialize cursor plane */
0877     ret = drm_universal_plane_init(dev, &cursor->base,
0878             0, &vmw_sou_cursor_funcs,
0879             vmw_cursor_plane_formats,
0880             ARRAY_SIZE(vmw_cursor_plane_formats),
0881             NULL, DRM_PLANE_TYPE_CURSOR, NULL);
0882     if (ret) {
0883         DRM_ERROR("Failed to initialize cursor plane");
0884         drm_plane_cleanup(&sou->base.primary);
0885         goto err_free;
0886     }
0887 
0888     drm_plane_helper_add(&cursor->base, &vmw_sou_cursor_plane_helper_funcs);
0889 
0890     ret = drm_connector_init(dev, connector, &vmw_sou_connector_funcs,
0891                  DRM_MODE_CONNECTOR_VIRTUAL);
0892     if (ret) {
0893         DRM_ERROR("Failed to initialize connector\n");
0894         goto err_free;
0895     }
0896 
0897     drm_connector_helper_add(connector, &vmw_sou_connector_helper_funcs);
0898     connector->status = vmw_du_connector_detect(connector, true);
0899 
0900     ret = drm_encoder_init(dev, encoder, &vmw_screen_object_encoder_funcs,
0901                    DRM_MODE_ENCODER_VIRTUAL, NULL);
0902     if (ret) {
0903         DRM_ERROR("Failed to initialize encoder\n");
0904         goto err_free_connector;
0905     }
0906 
0907     (void) drm_connector_attach_encoder(connector, encoder);
0908     encoder->possible_crtcs = (1 << unit);
0909     encoder->possible_clones = 0;
0910 
0911     ret = drm_connector_register(connector);
0912     if (ret) {
0913         DRM_ERROR("Failed to register connector\n");
0914         goto err_free_encoder;
0915     }
0916 
0917     ret = drm_crtc_init_with_planes(dev, crtc, primary,
0918                     &cursor->base,
0919                     &vmw_screen_object_crtc_funcs, NULL);
0920     if (ret) {
0921         DRM_ERROR("Failed to initialize CRTC\n");
0922         goto err_free_unregister;
0923     }
0924 
0925     drm_crtc_helper_add(crtc, &vmw_sou_crtc_helper_funcs);
0926 
0927     drm_mode_crtc_set_gamma_size(crtc, 256);
0928 
0929     drm_object_attach_property(&connector->base,
0930                    dev_priv->hotplug_mode_update_property, 1);
0931     drm_object_attach_property(&connector->base,
0932                    dev->mode_config.suggested_x_property, 0);
0933     drm_object_attach_property(&connector->base,
0934                    dev->mode_config.suggested_y_property, 0);
0935     return 0;
0936 
0937 err_free_unregister:
0938     drm_connector_unregister(connector);
0939 err_free_encoder:
0940     drm_encoder_cleanup(encoder);
0941 err_free_connector:
0942     drm_connector_cleanup(connector);
0943 err_free:
0944     kfree(sou);
0945     return ret;
0946 }
0947 
0948 int vmw_kms_sou_init_display(struct vmw_private *dev_priv)
0949 {
0950     struct drm_device *dev = &dev_priv->drm;
0951     int i, ret;
0952 
0953     if (!(dev_priv->capabilities & SVGA_CAP_SCREEN_OBJECT_2)) {
0954         return -ENOSYS;
0955     }
0956 
0957     ret = -ENOMEM;
0958 
0959     ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
0960     if (unlikely(ret != 0))
0961         return ret;
0962 
0963     for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
0964         vmw_sou_init(dev_priv, i);
0965 
0966     dev_priv->active_display_unit = vmw_du_screen_object;
0967 
0968     drm_mode_config_reset(dev);
0969 
0970     return 0;
0971 }
0972 
0973 static int do_bo_define_gmrfb(struct vmw_private *dev_priv,
0974                   struct vmw_framebuffer *framebuffer)
0975 {
0976     struct vmw_buffer_object *buf =
0977         container_of(framebuffer, struct vmw_framebuffer_bo,
0978                  base)->buffer;
0979     int depth = framebuffer->base.format->depth;
0980     struct {
0981         uint32_t header;
0982         SVGAFifoCmdDefineGMRFB body;
0983     } *cmd;
0984 
0985     /* Emulate RGBA support, contrary to svga_reg.h this is not
0986      * supported by hosts. This is only a problem if we are reading
0987      * this value later and expecting what we uploaded back.
0988      */
0989     if (depth == 32)
0990         depth = 24;
0991 
0992     cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
0993     if (!cmd)
0994         return -ENOMEM;
0995 
0996     cmd->header = SVGA_CMD_DEFINE_GMRFB;
0997     cmd->body.format.bitsPerPixel = framebuffer->base.format->cpp[0] * 8;
0998     cmd->body.format.colorDepth = depth;
0999     cmd->body.format.reserved = 0;
1000     cmd->body.bytesPerLine = framebuffer->base.pitches[0];
1001     /* Buffer is reserved in vram or GMR */
1002     vmw_bo_get_guest_ptr(&buf->base, &cmd->body.ptr);
1003     vmw_cmd_commit(dev_priv, sizeof(*cmd));
1004 
1005     return 0;
1006 }
1007 
1008 /**
1009  * vmw_sou_surface_fifo_commit - Callback to fill in and submit a
1010  * blit surface to screen command.
1011  *
1012  * @dirty: The closure structure.
1013  *
1014  * Fills in the missing fields in the command, and translates the cliprects
1015  * to match the destination bounding box encoded.
1016  */
1017 static void vmw_sou_surface_fifo_commit(struct vmw_kms_dirty *dirty)
1018 {
1019     struct vmw_kms_sou_surface_dirty *sdirty =
1020         container_of(dirty, typeof(*sdirty), base);
1021     struct vmw_kms_sou_dirty_cmd *cmd = dirty->cmd;
1022     s32 trans_x = dirty->unit->crtc.x - sdirty->dst_x;
1023     s32 trans_y = dirty->unit->crtc.y - sdirty->dst_y;
1024     size_t region_size = dirty->num_hits * sizeof(SVGASignedRect);
1025     SVGASignedRect *blit = (SVGASignedRect *) &cmd[1];
1026     int i;
1027 
1028     if (!dirty->num_hits) {
1029         vmw_cmd_commit(dirty->dev_priv, 0);
1030         return;
1031     }
1032 
1033     cmd->header.id = SVGA_3D_CMD_BLIT_SURFACE_TO_SCREEN;
1034     cmd->header.size = sizeof(cmd->body) + region_size;
1035 
1036     /*
1037      * Use the destination bounding box to specify destination - and
1038      * source bounding regions.
1039      */
1040     cmd->body.destRect.left = sdirty->left;
1041     cmd->body.destRect.right = sdirty->right;
1042     cmd->body.destRect.top = sdirty->top;
1043     cmd->body.destRect.bottom = sdirty->bottom;
1044 
1045     cmd->body.srcRect.left = sdirty->left + trans_x;
1046     cmd->body.srcRect.right = sdirty->right + trans_x;
1047     cmd->body.srcRect.top = sdirty->top + trans_y;
1048     cmd->body.srcRect.bottom = sdirty->bottom + trans_y;
1049 
1050     cmd->body.srcImage.sid = sdirty->sid;
1051     cmd->body.destScreenId = dirty->unit->unit;
1052 
1053     /* Blits are relative to the destination rect. Translate. */
1054     for (i = 0; i < dirty->num_hits; ++i, ++blit) {
1055         blit->left -= sdirty->left;
1056         blit->right -= sdirty->left;
1057         blit->top -= sdirty->top;
1058         blit->bottom -= sdirty->top;
1059     }
1060 
1061     vmw_cmd_commit(dirty->dev_priv, region_size + sizeof(*cmd));
1062 
1063     sdirty->left = sdirty->top = S32_MAX;
1064     sdirty->right = sdirty->bottom = S32_MIN;
1065 }
1066 
1067 /**
1068  * vmw_sou_surface_clip - Callback to encode a blit surface to screen cliprect.
1069  *
1070  * @dirty: The closure structure
1071  *
1072  * Encodes a SVGASignedRect cliprect and updates the bounding box of the
1073  * BLIT_SURFACE_TO_SCREEN command.
1074  */
1075 static void vmw_sou_surface_clip(struct vmw_kms_dirty *dirty)
1076 {
1077     struct vmw_kms_sou_surface_dirty *sdirty =
1078         container_of(dirty, typeof(*sdirty), base);
1079     struct vmw_kms_sou_dirty_cmd *cmd = dirty->cmd;
1080     SVGASignedRect *blit = (SVGASignedRect *) &cmd[1];
1081 
1082     /* Destination rect. */
1083     blit += dirty->num_hits;
1084     blit->left = dirty->unit_x1;
1085     blit->top = dirty->unit_y1;
1086     blit->right = dirty->unit_x2;
1087     blit->bottom = dirty->unit_y2;
1088 
1089     /* Destination bounding box */
1090     sdirty->left = min_t(s32, sdirty->left, dirty->unit_x1);
1091     sdirty->top = min_t(s32, sdirty->top, dirty->unit_y1);
1092     sdirty->right = max_t(s32, sdirty->right, dirty->unit_x2);
1093     sdirty->bottom = max_t(s32, sdirty->bottom, dirty->unit_y2);
1094 
1095     dirty->num_hits++;
1096 }
1097 
1098 /**
1099  * vmw_kms_sou_do_surface_dirty - Dirty part of a surface backed framebuffer
1100  *
1101  * @dev_priv: Pointer to the device private structure.
1102  * @framebuffer: Pointer to the surface-buffer backed framebuffer.
1103  * @clips: Array of clip rects. Either @clips or @vclips must be NULL.
1104  * @vclips: Alternate array of clip rects. Either @clips or @vclips must
1105  * be NULL.
1106  * @srf: Pointer to surface to blit from. If NULL, the surface attached
1107  * to @framebuffer will be used.
1108  * @dest_x: X coordinate offset to align @srf with framebuffer coordinates.
1109  * @dest_y: Y coordinate offset to align @srf with framebuffer coordinates.
1110  * @num_clips: Number of clip rects in @clips.
1111  * @inc: Increment to use when looping over @clips.
1112  * @out_fence: If non-NULL, will return a ref-counted pointer to a
1113  * struct vmw_fence_obj. The returned fence pointer may be NULL in which
1114  * case the device has already synchronized.
1115  * @crtc: If crtc is passed, perform surface dirty on that crtc only.
1116  *
1117  * Returns 0 on success, negative error code on failure. -ERESTARTSYS if
1118  * interrupted.
1119  */
1120 int vmw_kms_sou_do_surface_dirty(struct vmw_private *dev_priv,
1121                  struct vmw_framebuffer *framebuffer,
1122                  struct drm_clip_rect *clips,
1123                  struct drm_vmw_rect *vclips,
1124                  struct vmw_resource *srf,
1125                  s32 dest_x,
1126                  s32 dest_y,
1127                  unsigned num_clips, int inc,
1128                  struct vmw_fence_obj **out_fence,
1129                  struct drm_crtc *crtc)
1130 {
1131     struct vmw_framebuffer_surface *vfbs =
1132         container_of(framebuffer, typeof(*vfbs), base);
1133     struct vmw_kms_sou_surface_dirty sdirty;
1134     DECLARE_VAL_CONTEXT(val_ctx, NULL, 0);
1135     int ret;
1136 
1137     if (!srf)
1138         srf = &vfbs->surface->res;
1139 
1140     ret = vmw_validation_add_resource(&val_ctx, srf, 0, VMW_RES_DIRTY_NONE,
1141                       NULL, NULL);
1142     if (ret)
1143         return ret;
1144 
1145     ret = vmw_validation_prepare(&val_ctx, &dev_priv->cmdbuf_mutex, true);
1146     if (ret)
1147         goto out_unref;
1148 
1149     sdirty.base.fifo_commit = vmw_sou_surface_fifo_commit;
1150     sdirty.base.clip = vmw_sou_surface_clip;
1151     sdirty.base.dev_priv = dev_priv;
1152     sdirty.base.fifo_reserve_size = sizeof(struct vmw_kms_sou_dirty_cmd) +
1153       sizeof(SVGASignedRect) * num_clips;
1154     sdirty.base.crtc = crtc;
1155 
1156     sdirty.sid = srf->id;
1157     sdirty.left = sdirty.top = S32_MAX;
1158     sdirty.right = sdirty.bottom = S32_MIN;
1159     sdirty.dst_x = dest_x;
1160     sdirty.dst_y = dest_y;
1161 
1162     ret = vmw_kms_helper_dirty(dev_priv, framebuffer, clips, vclips,
1163                    dest_x, dest_y, num_clips, inc,
1164                    &sdirty.base);
1165     vmw_kms_helper_validation_finish(dev_priv, NULL, &val_ctx, out_fence,
1166                      NULL);
1167 
1168     return ret;
1169 
1170 out_unref:
1171     vmw_validation_unref_lists(&val_ctx);
1172     return ret;
1173 }
1174 
1175 /**
1176  * vmw_sou_bo_fifo_commit - Callback to submit a set of readback clips.
1177  *
1178  * @dirty: The closure structure.
1179  *
1180  * Commits a previously built command buffer of readback clips.
1181  */
1182 static void vmw_sou_bo_fifo_commit(struct vmw_kms_dirty *dirty)
1183 {
1184     if (!dirty->num_hits) {
1185         vmw_cmd_commit(dirty->dev_priv, 0);
1186         return;
1187     }
1188 
1189     vmw_cmd_commit(dirty->dev_priv,
1190             sizeof(struct vmw_kms_sou_bo_blit) *
1191             dirty->num_hits);
1192 }
1193 
1194 /**
1195  * vmw_sou_bo_clip - Callback to encode a readback cliprect.
1196  *
1197  * @dirty: The closure structure
1198  *
1199  * Encodes a BLIT_GMRFB_TO_SCREEN cliprect.
1200  */
1201 static void vmw_sou_bo_clip(struct vmw_kms_dirty *dirty)
1202 {
1203     struct vmw_kms_sou_bo_blit *blit = dirty->cmd;
1204 
1205     blit += dirty->num_hits;
1206     blit->header = SVGA_CMD_BLIT_GMRFB_TO_SCREEN;
1207     blit->body.destScreenId = dirty->unit->unit;
1208     blit->body.srcOrigin.x = dirty->fb_x;
1209     blit->body.srcOrigin.y = dirty->fb_y;
1210     blit->body.destRect.left = dirty->unit_x1;
1211     blit->body.destRect.top = dirty->unit_y1;
1212     blit->body.destRect.right = dirty->unit_x2;
1213     blit->body.destRect.bottom = dirty->unit_y2;
1214     dirty->num_hits++;
1215 }
1216 
1217 /**
1218  * vmw_kms_sou_do_bo_dirty - Dirty part of a buffer-object backed framebuffer
1219  *
1220  * @dev_priv: Pointer to the device private structure.
1221  * @framebuffer: Pointer to the buffer-object backed framebuffer.
1222  * @clips: Array of clip rects.
1223  * @vclips: Alternate array of clip rects. Either @clips or @vclips must
1224  * be NULL.
1225  * @num_clips: Number of clip rects in @clips.
1226  * @increment: Increment to use when looping over @clips.
1227  * @interruptible: Whether to perform waits interruptible if possible.
1228  * @out_fence: If non-NULL, will return a ref-counted pointer to a
1229  * struct vmw_fence_obj. The returned fence pointer may be NULL in which
1230  * case the device has already synchronized.
1231  * @crtc: If crtc is passed, perform bo dirty on that crtc only.
1232  *
1233  * Returns 0 on success, negative error code on failure. -ERESTARTSYS if
1234  * interrupted.
1235  */
1236 int vmw_kms_sou_do_bo_dirty(struct vmw_private *dev_priv,
1237                 struct vmw_framebuffer *framebuffer,
1238                 struct drm_clip_rect *clips,
1239                 struct drm_vmw_rect *vclips,
1240                 unsigned num_clips, int increment,
1241                 bool interruptible,
1242                 struct vmw_fence_obj **out_fence,
1243                 struct drm_crtc *crtc)
1244 {
1245     struct vmw_buffer_object *buf =
1246         container_of(framebuffer, struct vmw_framebuffer_bo,
1247                  base)->buffer;
1248     struct vmw_kms_dirty dirty;
1249     DECLARE_VAL_CONTEXT(val_ctx, NULL, 0);
1250     int ret;
1251 
1252     ret = vmw_validation_add_bo(&val_ctx, buf, false, false);
1253     if (ret)
1254         return ret;
1255 
1256     ret = vmw_validation_prepare(&val_ctx, NULL, interruptible);
1257     if (ret)
1258         goto out_unref;
1259 
1260     ret = do_bo_define_gmrfb(dev_priv, framebuffer);
1261     if (unlikely(ret != 0))
1262         goto out_revert;
1263 
1264     dirty.crtc = crtc;
1265     dirty.fifo_commit = vmw_sou_bo_fifo_commit;
1266     dirty.clip = vmw_sou_bo_clip;
1267     dirty.fifo_reserve_size = sizeof(struct vmw_kms_sou_bo_blit) *
1268         num_clips;
1269     ret = vmw_kms_helper_dirty(dev_priv, framebuffer, clips, vclips,
1270                    0, 0, num_clips, increment, &dirty);
1271     vmw_kms_helper_validation_finish(dev_priv, NULL, &val_ctx, out_fence,
1272                      NULL);
1273 
1274     return ret;
1275 
1276 out_revert:
1277     vmw_validation_revert(&val_ctx);
1278 out_unref:
1279     vmw_validation_unref_lists(&val_ctx);
1280 
1281     return ret;
1282 }
1283 
1284 
1285 /**
1286  * vmw_sou_readback_fifo_commit - Callback to submit a set of readback clips.
1287  *
1288  * @dirty: The closure structure.
1289  *
1290  * Commits a previously built command buffer of readback clips.
1291  */
1292 static void vmw_sou_readback_fifo_commit(struct vmw_kms_dirty *dirty)
1293 {
1294     if (!dirty->num_hits) {
1295         vmw_cmd_commit(dirty->dev_priv, 0);
1296         return;
1297     }
1298 
1299     vmw_cmd_commit(dirty->dev_priv,
1300             sizeof(struct vmw_kms_sou_readback_blit) *
1301             dirty->num_hits);
1302 }
1303 
1304 /**
1305  * vmw_sou_readback_clip - Callback to encode a readback cliprect.
1306  *
1307  * @dirty: The closure structure
1308  *
1309  * Encodes a BLIT_SCREEN_TO_GMRFB cliprect.
1310  */
1311 static void vmw_sou_readback_clip(struct vmw_kms_dirty *dirty)
1312 {
1313     struct vmw_kms_sou_readback_blit *blit = dirty->cmd;
1314 
1315     blit += dirty->num_hits;
1316     blit->header = SVGA_CMD_BLIT_SCREEN_TO_GMRFB;
1317     blit->body.srcScreenId = dirty->unit->unit;
1318     blit->body.destOrigin.x = dirty->fb_x;
1319     blit->body.destOrigin.y = dirty->fb_y;
1320     blit->body.srcRect.left = dirty->unit_x1;
1321     blit->body.srcRect.top = dirty->unit_y1;
1322     blit->body.srcRect.right = dirty->unit_x2;
1323     blit->body.srcRect.bottom = dirty->unit_y2;
1324     dirty->num_hits++;
1325 }
1326 
1327 /**
1328  * vmw_kms_sou_readback - Perform a readback from the screen object system to
1329  * a buffer-object backed framebuffer.
1330  *
1331  * @dev_priv: Pointer to the device private structure.
1332  * @file_priv: Pointer to a struct drm_file identifying the caller.
1333  * Must be set to NULL if @user_fence_rep is NULL.
1334  * @vfb: Pointer to the buffer-object backed framebuffer.
1335  * @user_fence_rep: User-space provided structure for fence information.
1336  * Must be set to non-NULL if @file_priv is non-NULL.
1337  * @vclips: Array of clip rects.
1338  * @num_clips: Number of clip rects in @vclips.
1339  * @crtc: If crtc is passed, readback on that crtc only.
1340  *
1341  * Returns 0 on success, negative error code on failure. -ERESTARTSYS if
1342  * interrupted.
1343  */
1344 int vmw_kms_sou_readback(struct vmw_private *dev_priv,
1345              struct drm_file *file_priv,
1346              struct vmw_framebuffer *vfb,
1347              struct drm_vmw_fence_rep __user *user_fence_rep,
1348              struct drm_vmw_rect *vclips,
1349              uint32_t num_clips,
1350              struct drm_crtc *crtc)
1351 {
1352     struct vmw_buffer_object *buf =
1353         container_of(vfb, struct vmw_framebuffer_bo, base)->buffer;
1354     struct vmw_kms_dirty dirty;
1355     DECLARE_VAL_CONTEXT(val_ctx, NULL, 0);
1356     int ret;
1357 
1358     ret = vmw_validation_add_bo(&val_ctx, buf, false, false);
1359     if (ret)
1360         return ret;
1361 
1362     ret = vmw_validation_prepare(&val_ctx, NULL, true);
1363     if (ret)
1364         goto out_unref;
1365 
1366     ret = do_bo_define_gmrfb(dev_priv, vfb);
1367     if (unlikely(ret != 0))
1368         goto out_revert;
1369 
1370     dirty.crtc = crtc;
1371     dirty.fifo_commit = vmw_sou_readback_fifo_commit;
1372     dirty.clip = vmw_sou_readback_clip;
1373     dirty.fifo_reserve_size = sizeof(struct vmw_kms_sou_readback_blit) *
1374         num_clips;
1375     ret = vmw_kms_helper_dirty(dev_priv, vfb, NULL, vclips,
1376                    0, 0, num_clips, 1, &dirty);
1377     vmw_kms_helper_validation_finish(dev_priv, file_priv, &val_ctx, NULL,
1378                      user_fence_rep);
1379 
1380     return ret;
1381 
1382 out_revert:
1383     vmw_validation_revert(&val_ctx);
1384 out_unref:
1385     vmw_validation_unref_lists(&val_ctx);
1386     
1387     return ret;
1388 }
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