OSCL-LXR linux-6.0.1/​drivers/​gpu/​drm/​vmwgfx/​vmwgfx_stdu.c	Source navigation Diff markup Identifier search General search
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 // SPDX-License-Identifier: GPL-2.0 OR MIT
 /******************************************************************************
  *
  * COPYRIGHT (C) 2014-2022 VMware, Inc., Palo Alto, CA., USA
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the
  * "Software"), to deal in the Software without restriction, including
  * without limitation the rights to use, copy, modify, merge, publish,
  * distribute, sub license, and/or sell copies of the Software, and to
  * permit persons to whom the Software is furnished to do so, subject to
  * the following conditions:
  *
  * The above copyright notice and this permission notice (including the
  * next paragraph) shall be included in all copies or substantial portions
  * of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  *
  ******************************************************************************/
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_damage_helper.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_plane_helper.h>
 #include <drm/drm_vblank.h>
 
 #include "vmwgfx_kms.h"
 #include "vmw_surface_cache.h"
 
 #define vmw_crtc_to_stdu(x) \
     container_of(x, struct vmw_screen_target_display_unit, base.crtc)
 #define vmw_encoder_to_stdu(x) \
     container_of(x, struct vmw_screen_target_display_unit, base.encoder)
 #define vmw_connector_to_stdu(x) \
     container_of(x, struct vmw_screen_target_display_unit, base.connector)
 
 
 
 enum stdu_content_type {
     SAME_AS_DISPLAY = 0,
     SEPARATE_SURFACE,
     SEPARATE_BO
 };
 
 /**
  * struct vmw_stdu_dirty - closure structure for the update functions
  *
  * @base: The base type we derive from. Used by vmw_kms_helper_dirty().
  * @transfer: Transfer direction for DMA command.
  * @left: Left side of bounding box.
  * @right: Right side of bounding box.
  * @top: Top side of bounding box.
  * @bottom: Bottom side of bounding box.
  * @fb_left: Left side of the framebuffer/content bounding box
  * @fb_top: Top of the framebuffer/content bounding box
  * @pitch: framebuffer pitch (stride)
  * @buf: buffer object when DMA-ing between buffer and screen targets.
  * @sid: Surface ID when copying between surface and screen targets.
  */
 struct vmw_stdu_dirty {
     struct vmw_kms_dirty base;
     SVGA3dTransferType  transfer;
     s32 left, right, top, bottom;
     s32 fb_left, fb_top;
     u32 pitch;
     union {
         struct vmw_buffer_object *buf;
         u32 sid;
     };
 };
 
 /*
  * SVGA commands that are used by this code. Please see the device headers
  * for explanation.
  */
 struct vmw_stdu_update {
     SVGA3dCmdHeader header;
     SVGA3dCmdUpdateGBScreenTarget body;
 };
 
 struct vmw_stdu_dma {
     SVGA3dCmdHeader     header;
     SVGA3dCmdSurfaceDMA body;
 };
 
 struct vmw_stdu_surface_copy {
     SVGA3dCmdHeader      header;
     SVGA3dCmdSurfaceCopy body;
 };
 
 struct vmw_stdu_update_gb_image {
     SVGA3dCmdHeader header;
     SVGA3dCmdUpdateGBImage body;
 };
 
 /**
  * struct vmw_screen_target_display_unit
  *
  * @base: VMW specific DU structure
  * @display_srf: surface to be displayed.  The dimension of this will always
  *               match the display mode.  If the display mode matches
  *               content_vfbs dimensions, then this is a pointer into the
  *               corresponding field in content_vfbs.  If not, then this
  *               is a separate buffer to which content_vfbs will blit to.
  * @content_fb_type: content_fb type
  * @display_width:  display width
  * @display_height: display height
  * @defined:     true if the current display unit has been initialized
  * @cpp:         Bytes per pixel
  */
 struct vmw_screen_target_display_unit {
     struct vmw_display_unit base;
     struct vmw_surface *display_srf;
     enum stdu_content_type content_fb_type;
     s32 display_width, display_height;
 
     bool defined;
 
     /* For CPU Blit */
     unsigned int cpp;
 };
 
 
 
 static void vmw_stdu_destroy(struct vmw_screen_target_display_unit *stdu);
 
 
 
 /******************************************************************************
  * Screen Target Display Unit CRTC Functions
  *****************************************************************************/
 
 static bool vmw_stdu_use_cpu_blit(const struct vmw_private *vmw)
 {
     return !(vmw->capabilities & SVGA_CAP_3D) || vmw->vram_size < (32 * 1024 * 1024);
 }
 
 
 /**
  * vmw_stdu_crtc_destroy - cleans up the STDU
  *
  * @crtc: used to get a reference to the containing STDU
  */
 static void vmw_stdu_crtc_destroy(struct drm_crtc *crtc)
 {
     vmw_stdu_destroy(vmw_crtc_to_stdu(crtc));
 }
 
 /**
  * vmw_stdu_define_st - Defines a Screen Target
  *
  * @dev_priv:  VMW DRM device
  * @stdu: display unit to create a Screen Target for
  * @mode: The mode to set.
  * @crtc_x: X coordinate of screen target relative to framebuffer origin.
  * @crtc_y: Y coordinate of screen target relative to framebuffer origin.
  *
  * Creates a STDU that we can used later.  This function is called whenever the
  * framebuffer size changes.
  *
  * RETURNs:
  * 0 on success, error code on failure
  */
 static int vmw_stdu_define_st(struct vmw_private *dev_priv,
                   struct vmw_screen_target_display_unit *stdu,
                   struct drm_display_mode *mode,
                   int crtc_x, int crtc_y)
 {
     struct {
         SVGA3dCmdHeader header;
         SVGA3dCmdDefineGBScreenTarget body;
     } *cmd;
 
     cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
     if (unlikely(cmd == NULL))
         return -ENOMEM;
 
     cmd->header.id   = SVGA_3D_CMD_DEFINE_GB_SCREENTARGET;
     cmd->header.size = sizeof(cmd->body);
 
     cmd->body.stid   = stdu->base.unit;
     cmd->body.width  = mode->hdisplay;
     cmd->body.height = mode->vdisplay;
     cmd->body.flags  = (0 == cmd->body.stid) ? SVGA_STFLAG_PRIMARY : 0;
     cmd->body.dpi    = 0;
     cmd->body.xRoot  = crtc_x;
     cmd->body.yRoot  = crtc_y;
 
     stdu->base.set_gui_x = cmd->body.xRoot;
     stdu->base.set_gui_y = cmd->body.yRoot;
 
     vmw_cmd_commit(dev_priv, sizeof(*cmd));
 
     stdu->defined = true;
     stdu->display_width  = mode->hdisplay;
     stdu->display_height = mode->vdisplay;
 
     return 0;
 }
 
 
 
 /**
  * vmw_stdu_bind_st - Binds a surface to a Screen Target
  *
  * @dev_priv: VMW DRM device
  * @stdu: display unit affected
  * @res: Buffer to bind to the screen target.  Set to NULL to blank screen.
  *
  * Binding a surface to a Screen Target the same as flipping
  */
 static int vmw_stdu_bind_st(struct vmw_private *dev_priv,
                 struct vmw_screen_target_display_unit *stdu,
                 const struct vmw_resource *res)
 {
     SVGA3dSurfaceImageId image;
 
     struct {
         SVGA3dCmdHeader header;
         SVGA3dCmdBindGBScreenTarget body;
     } *cmd;
 
 
     if (!stdu->defined) {
         DRM_ERROR("No screen target defined\n");
         return -EINVAL;
     }
 
     /* Set up image using information in vfb */
     memset(&image, 0, sizeof(image));
     image.sid = res ? res->id : SVGA3D_INVALID_ID;
 
     cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
     if (unlikely(cmd == NULL))
         return -ENOMEM;
 
     cmd->header.id   = SVGA_3D_CMD_BIND_GB_SCREENTARGET;
     cmd->header.size = sizeof(cmd->body);
 
     cmd->body.stid   = stdu->base.unit;
     cmd->body.image  = image;
 
     vmw_cmd_commit(dev_priv, sizeof(*cmd));
 
     return 0;
 }
 
 /**
  * vmw_stdu_populate_update - populate an UPDATE_GB_SCREENTARGET command with a
  * bounding box.
  *
  * @cmd: Pointer to command stream.
  * @unit: Screen target unit.
  * @left: Left side of bounding box.
  * @right: Right side of bounding box.
  * @top: Top side of bounding box.
  * @bottom: Bottom side of bounding box.
  */
 static void vmw_stdu_populate_update(void *cmd, int unit,
                      s32 left, s32 right, s32 top, s32 bottom)
 {
     struct vmw_stdu_update *update = cmd;
 
     update->header.id   = SVGA_3D_CMD_UPDATE_GB_SCREENTARGET;
     update->header.size = sizeof(update->body);
 
     update->body.stid   = unit;
     update->body.rect.x = left;
     update->body.rect.y = top;
     update->body.rect.w = right - left;
     update->body.rect.h = bottom - top;
 }
 
 /**
  * vmw_stdu_update_st - Full update of a Screen Target
  *
  * @dev_priv: VMW DRM device
  * @stdu: display unit affected
  *
  * This function needs to be called whenever the content of a screen
  * target has changed completely. Typically as a result of a backing
  * surface change.
  *
  * RETURNS:
  * 0 on success, error code on failure
  */
 static int vmw_stdu_update_st(struct vmw_private *dev_priv,
                   struct vmw_screen_target_display_unit *stdu)
 {
     struct vmw_stdu_update *cmd;
 
     if (!stdu->defined) {
         DRM_ERROR("No screen target defined");
         return -EINVAL;
     }
 
     cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
     if (unlikely(cmd == NULL))
         return -ENOMEM;
 
     vmw_stdu_populate_update(cmd, stdu->base.unit,
                  0, stdu->display_width,
                  0, stdu->display_height);
 
     vmw_cmd_commit(dev_priv, sizeof(*cmd));
 
     return 0;
 }
 
 
 
 /**
  * vmw_stdu_destroy_st - Destroy a Screen Target
  *
  * @dev_priv:  VMW DRM device
  * @stdu: display unit to destroy
  */
 static int vmw_stdu_destroy_st(struct vmw_private *dev_priv,
                    struct vmw_screen_target_display_unit *stdu)
 {
     int    ret;
 
     struct {
         SVGA3dCmdHeader header;
         SVGA3dCmdDestroyGBScreenTarget body;
     } *cmd;
 
 
     /* Nothing to do if not successfully defined */
     if (unlikely(!stdu->defined))
         return 0;
 
     cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
     if (unlikely(cmd == NULL))
         return -ENOMEM;
 
     cmd->header.id   = SVGA_3D_CMD_DESTROY_GB_SCREENTARGET;
     cmd->header.size = sizeof(cmd->body);
 
     cmd->body.stid   = stdu->base.unit;
 
     vmw_cmd_commit(dev_priv, sizeof(*cmd));
 
     /* Force sync */
     ret = vmw_fallback_wait(dev_priv, false, true, 0, false, 3*HZ);
     if (unlikely(ret != 0))
         DRM_ERROR("Failed to sync with HW");
 
     stdu->defined = false;
     stdu->display_width  = 0;
     stdu->display_height = 0;
 
     return ret;
 }
 
 
 /**
  * vmw_stdu_crtc_mode_set_nofb - Updates screen target size
  *
  * @crtc: CRTC associated with the screen target
  *
  * This function defines/destroys a screen target
  *
  */
 static void vmw_stdu_crtc_mode_set_nofb(struct drm_crtc *crtc)
 {
     struct vmw_private *dev_priv;
     struct vmw_screen_target_display_unit *stdu;
     struct drm_connector_state *conn_state;
     struct vmw_connector_state *vmw_conn_state;
     int x, y, ret;
 
     stdu = vmw_crtc_to_stdu(crtc);
     dev_priv = vmw_priv(crtc->dev);
     conn_state = stdu->base.connector.state;
     vmw_conn_state = vmw_connector_state_to_vcs(conn_state);
 
     if (stdu->defined) {
         ret = vmw_stdu_bind_st(dev_priv, stdu, NULL);
         if (ret)
             DRM_ERROR("Failed to blank CRTC\n");
 
         (void) vmw_stdu_update_st(dev_priv, stdu);
 
         ret = vmw_stdu_destroy_st(dev_priv, stdu);
         if (ret)
             DRM_ERROR("Failed to destroy Screen Target\n");
 
         stdu->content_fb_type = SAME_AS_DISPLAY;
     }
 
     if (!crtc->state->enable)
         return;
 
     x = vmw_conn_state->gui_x;
     y = vmw_conn_state->gui_y;
 
     vmw_svga_enable(dev_priv);
     ret = vmw_stdu_define_st(dev_priv, stdu, &crtc->mode, x, y);
 
     if (ret)
         DRM_ERROR("Failed to define Screen Target of size %dx%d\n",
               crtc->x, crtc->y);
 }
 
 
 static void vmw_stdu_crtc_helper_prepare(struct drm_crtc *crtc)
 {
 }
 
 static void vmw_stdu_crtc_atomic_enable(struct drm_crtc *crtc,
                     struct drm_atomic_state *state)
 {
 }
 
 static void vmw_stdu_crtc_atomic_disable(struct drm_crtc *crtc,
                      struct drm_atomic_state *state)
 {
     struct vmw_private *dev_priv;
     struct vmw_screen_target_display_unit *stdu;
     int ret;
 
 
     if (!crtc) {
         DRM_ERROR("CRTC is NULL\n");
         return;
     }
 
     stdu     = vmw_crtc_to_stdu(crtc);
     dev_priv = vmw_priv(crtc->dev);
 
     if (stdu->defined) {
         ret = vmw_stdu_bind_st(dev_priv, stdu, NULL);
         if (ret)
             DRM_ERROR("Failed to blank CRTC\n");
 
         (void) vmw_stdu_update_st(dev_priv, stdu);
 
         ret = vmw_stdu_destroy_st(dev_priv, stdu);
         if (ret)
             DRM_ERROR("Failed to destroy Screen Target\n");
 
         stdu->content_fb_type = SAME_AS_DISPLAY;
     }
 }
 
 /**
  * vmw_stdu_bo_clip - Callback to encode a suface DMA command cliprect
  *
  * @dirty: The closure structure.
  *
  * Encodes a surface DMA command cliprect and updates the bounding box
  * for the DMA.
  */
 static void vmw_stdu_bo_clip(struct vmw_kms_dirty *dirty)
 {
     struct vmw_stdu_dirty *ddirty =
         container_of(dirty, struct vmw_stdu_dirty, base);
     struct vmw_stdu_dma *cmd = dirty->cmd;
     struct SVGA3dCopyBox *blit = (struct SVGA3dCopyBox *) &cmd[1];
 
     blit += dirty->num_hits;
     blit->srcx = dirty->fb_x;
     blit->srcy = dirty->fb_y;
     blit->x = dirty->unit_x1;
     blit->y = dirty->unit_y1;
     blit->d = 1;
     blit->w = dirty->unit_x2 - dirty->unit_x1;
     blit->h = dirty->unit_y2 - dirty->unit_y1;
     dirty->num_hits++;
 
     if (ddirty->transfer != SVGA3D_WRITE_HOST_VRAM)
         return;
 
     /* Destination bounding box */
     ddirty->left = min_t(s32, ddirty->left, dirty->unit_x1);
     ddirty->top = min_t(s32, ddirty->top, dirty->unit_y1);
     ddirty->right = max_t(s32, ddirty->right, dirty->unit_x2);
     ddirty->bottom = max_t(s32, ddirty->bottom, dirty->unit_y2);
 }
 
 /**
  * vmw_stdu_bo_fifo_commit - Callback to fill in and submit a DMA command.
  *
  * @dirty: The closure structure.
  *
  * Fills in the missing fields in a DMA command, and optionally encodes
  * a screen target update command, depending on transfer direction.
  */
 static void vmw_stdu_bo_fifo_commit(struct vmw_kms_dirty *dirty)
 {
     struct vmw_stdu_dirty *ddirty =
         container_of(dirty, struct vmw_stdu_dirty, base);
     struct vmw_screen_target_display_unit *stdu =
         container_of(dirty->unit, typeof(*stdu), base);
     struct vmw_stdu_dma *cmd = dirty->cmd;
     struct SVGA3dCopyBox *blit = (struct SVGA3dCopyBox *) &cmd[1];
     SVGA3dCmdSurfaceDMASuffix *suffix =
         (SVGA3dCmdSurfaceDMASuffix *) &blit[dirty->num_hits];
     size_t blit_size = sizeof(*blit) * dirty->num_hits + sizeof(*suffix);
 
     if (!dirty->num_hits) {
         vmw_cmd_commit(dirty->dev_priv, 0);
         return;
     }
 
     cmd->header.id = SVGA_3D_CMD_SURFACE_DMA;
     cmd->header.size = sizeof(cmd->body) + blit_size;
     vmw_bo_get_guest_ptr(&ddirty->buf->base, &cmd->body.guest.ptr);
     cmd->body.guest.pitch = ddirty->pitch;
     cmd->body.host.sid = stdu->display_srf->res.id;
     cmd->body.host.face = 0;
     cmd->body.host.mipmap = 0;
     cmd->body.transfer = ddirty->transfer;
     suffix->suffixSize = sizeof(*suffix);
     suffix->maximumOffset = ddirty->buf->base.base.size;
 
     if (ddirty->transfer == SVGA3D_WRITE_HOST_VRAM) {
         blit_size += sizeof(struct vmw_stdu_update);
 
         vmw_stdu_populate_update(&suffix[1], stdu->base.unit,
                      ddirty->left, ddirty->right,
                      ddirty->top, ddirty->bottom);
     }
 
     vmw_cmd_commit(dirty->dev_priv, sizeof(*cmd) + blit_size);
 
     stdu->display_srf->res.res_dirty = true;
     ddirty->left = ddirty->top = S32_MAX;
     ddirty->right = ddirty->bottom = S32_MIN;
 }
 
 
 /**
  * vmw_stdu_bo_cpu_clip - Callback to encode a CPU blit
  *
  * @dirty: The closure structure.
  *
  * This function calculates the bounding box for all the incoming clips.
  */
 static void vmw_stdu_bo_cpu_clip(struct vmw_kms_dirty *dirty)
 {
     struct vmw_stdu_dirty *ddirty =
         container_of(dirty, struct vmw_stdu_dirty, base);
 
     dirty->num_hits = 1;
 
     /* Calculate destination bounding box */
     ddirty->left = min_t(s32, ddirty->left, dirty->unit_x1);
     ddirty->top = min_t(s32, ddirty->top, dirty->unit_y1);
     ddirty->right = max_t(s32, ddirty->right, dirty->unit_x2);
     ddirty->bottom = max_t(s32, ddirty->bottom, dirty->unit_y2);
 
     /*
      * Calculate content bounding box.  We only need the top-left
      * coordinate because width and height will be the same as the
      * destination bounding box above
      */
     ddirty->fb_left = min_t(s32, ddirty->fb_left, dirty->fb_x);
     ddirty->fb_top  = min_t(s32, ddirty->fb_top, dirty->fb_y);
 }
 
 
 /**
  * vmw_stdu_bo_cpu_commit - Callback to do a CPU blit from buffer object
  *
  * @dirty: The closure structure.
  *
  * For the special case when we cannot create a proxy surface in a
  * 2D VM, we have to do a CPU blit ourselves.
  */
 static void vmw_stdu_bo_cpu_commit(struct vmw_kms_dirty *dirty)
 {
     struct vmw_stdu_dirty *ddirty =
         container_of(dirty, struct vmw_stdu_dirty, base);
     struct vmw_screen_target_display_unit *stdu =
         container_of(dirty->unit, typeof(*stdu), base);
     s32 width, height;
     s32 src_pitch, dst_pitch;
     struct ttm_buffer_object *src_bo, *dst_bo;
     u32 src_offset, dst_offset;
     struct vmw_diff_cpy diff = VMW_CPU_BLIT_DIFF_INITIALIZER(stdu->cpp);
 
     if (!dirty->num_hits)
         return;
 
     width = ddirty->right - ddirty->left;
     height = ddirty->bottom - ddirty->top;
 
     if (width == 0 || height == 0)
         return;
 
     /* Assume we are blitting from Guest (bo) to Host (display_srf) */
     dst_pitch = stdu->display_srf->metadata.base_size.width * stdu->cpp;
     dst_bo = &stdu->display_srf->res.backup->base;
     dst_offset = ddirty->top * dst_pitch + ddirty->left * stdu->cpp;
 
     src_pitch = ddirty->pitch;
     src_bo = &ddirty->buf->base;
     src_offset = ddirty->fb_top * src_pitch + ddirty->fb_left * stdu->cpp;
 
     /* Swap src and dst if the assumption was wrong. */
     if (ddirty->transfer != SVGA3D_WRITE_HOST_VRAM) {
         swap(dst_pitch, src_pitch);
         swap(dst_bo, src_bo);
         swap(src_offset, dst_offset);
     }
 
     (void) vmw_bo_cpu_blit(dst_bo, dst_offset, dst_pitch,
                    src_bo, src_offset, src_pitch,
                    width * stdu->cpp, height, &diff);
 
     if (ddirty->transfer == SVGA3D_WRITE_HOST_VRAM &&
         drm_rect_visible(&diff.rect)) {
         struct vmw_private *dev_priv;
         struct vmw_stdu_update *cmd;
         struct drm_clip_rect region;
         int ret;
 
         /* We are updating the actual surface, not a proxy */
         region.x1 = diff.rect.x1;
         region.x2 = diff.rect.x2;
         region.y1 = diff.rect.y1;
         region.y2 = diff.rect.y2;
         ret = vmw_kms_update_proxy(&stdu->display_srf->res, &region,
                        1, 1);
         if (ret)
             goto out_cleanup;
 
 
         dev_priv = vmw_priv(stdu->base.crtc.dev);
         cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
         if (!cmd)
             goto out_cleanup;
 
         vmw_stdu_populate_update(cmd, stdu->base.unit,
                      region.x1, region.x2,
                      region.y1, region.y2);
 
         vmw_cmd_commit(dev_priv, sizeof(*cmd));
     }
 
 out_cleanup:
     ddirty->left = ddirty->top = ddirty->fb_left = ddirty->fb_top = S32_MAX;
     ddirty->right = ddirty->bottom = S32_MIN;
 }
 
 /**
  * vmw_kms_stdu_dma - Perform a DMA transfer between a buffer-object backed
  * framebuffer and the screen target system.
  *
  * @dev_priv: Pointer to the device private structure.
  * @file_priv: Pointer to a struct drm-file identifying the caller. May be
  * set to NULL, but then @user_fence_rep must also be set to NULL.
  * @vfb: Pointer to the buffer-object backed framebuffer.
  * @user_fence_rep: User-space provided structure for fence information.
  * @clips: Array of clip rects. Either @clips or @vclips must be NULL.
  * @vclips: Alternate array of clip rects. Either @clips or @vclips must
  * be NULL.
  * @num_clips: Number of clip rects in @clips or @vclips.
  * @increment: Increment to use when looping over @clips or @vclips.
  * @to_surface: Whether to DMA to the screen target system as opposed to
  * from the screen target system.
  * @interruptible: Whether to perform waits interruptible if possible.
  * @crtc: If crtc is passed, perform stdu dma on that crtc only.
  *
  * If DMA-ing till the screen target system, the function will also notify
  * the screen target system that a bounding box of the cliprects has been
  * updated.
  * Returns 0 on success, negative error code on failure. -ERESTARTSYS if
  * interrupted.
  */
 int vmw_kms_stdu_dma(struct vmw_private *dev_priv,
              struct drm_file *file_priv,
              struct vmw_framebuffer *vfb,
              struct drm_vmw_fence_rep __user *user_fence_rep,
              struct drm_clip_rect *clips,
              struct drm_vmw_rect *vclips,
              uint32_t num_clips,
              int increment,
              bool to_surface,
              bool interruptible,
              struct drm_crtc *crtc)
 {
     struct vmw_buffer_object *buf =
         container_of(vfb, struct vmw_framebuffer_bo, base)->buffer;
     struct vmw_stdu_dirty ddirty;
     int ret;
     bool cpu_blit = vmw_stdu_use_cpu_blit(dev_priv);
     DECLARE_VAL_CONTEXT(val_ctx, NULL, 0);
 
     /*
      * VMs without 3D support don't have the surface DMA command and
      * we'll be using a CPU blit, and the framebuffer should be moved out
      * of VRAM.
      */
     ret = vmw_validation_add_bo(&val_ctx, buf, false, cpu_blit);
     if (ret)
         return ret;
 
     ret = vmw_validation_prepare(&val_ctx, NULL, interruptible);
     if (ret)
         goto out_unref;
 
     ddirty.transfer = (to_surface) ? SVGA3D_WRITE_HOST_VRAM :
         SVGA3D_READ_HOST_VRAM;
     ddirty.left = ddirty.top = S32_MAX;
     ddirty.right = ddirty.bottom = S32_MIN;
     ddirty.fb_left = ddirty.fb_top = S32_MAX;
     ddirty.pitch = vfb->base.pitches[0];
     ddirty.buf = buf;
     ddirty.base.fifo_commit = vmw_stdu_bo_fifo_commit;
     ddirty.base.clip = vmw_stdu_bo_clip;
     ddirty.base.fifo_reserve_size = sizeof(struct vmw_stdu_dma) +
         num_clips * sizeof(SVGA3dCopyBox) +
         sizeof(SVGA3dCmdSurfaceDMASuffix);
     if (to_surface)
         ddirty.base.fifo_reserve_size += sizeof(struct vmw_stdu_update);
 
 
     if (cpu_blit) {
         ddirty.base.fifo_commit = vmw_stdu_bo_cpu_commit;
         ddirty.base.clip = vmw_stdu_bo_cpu_clip;
         ddirty.base.fifo_reserve_size = 0;
     }
 
     ddirty.base.crtc = crtc;
 
     ret = vmw_kms_helper_dirty(dev_priv, vfb, clips, vclips,
                    0, 0, num_clips, increment, &ddirty.base);
 
     vmw_kms_helper_validation_finish(dev_priv, file_priv, &val_ctx, NULL,
                      user_fence_rep);
     return ret;
 
 out_unref:
     vmw_validation_unref_lists(&val_ctx);
     return ret;
 }
 
 /**
  * vmw_kms_stdu_surface_clip - Callback to encode a surface copy command cliprect
  *
  * @dirty: The closure structure.
  *
  * Encodes a surface copy command cliprect and updates the bounding box
  * for the copy.
  */
 static void vmw_kms_stdu_surface_clip(struct vmw_kms_dirty *dirty)
 {
     struct vmw_stdu_dirty *sdirty =
         container_of(dirty, struct vmw_stdu_dirty, base);
     struct vmw_stdu_surface_copy *cmd = dirty->cmd;
     struct vmw_screen_target_display_unit *stdu =
         container_of(dirty->unit, typeof(*stdu), base);
 
     if (sdirty->sid != stdu->display_srf->res.id) {
         struct SVGA3dCopyBox *blit = (struct SVGA3dCopyBox *) &cmd[1];
 
         blit += dirty->num_hits;
         blit->srcx = dirty->fb_x;
         blit->srcy = dirty->fb_y;
         blit->x = dirty->unit_x1;
         blit->y = dirty->unit_y1;
         blit->d = 1;
         blit->w = dirty->unit_x2 - dirty->unit_x1;
         blit->h = dirty->unit_y2 - dirty->unit_y1;
     }
 
     dirty->num_hits++;
 
     /* Destination bounding box */
     sdirty->left = min_t(s32, sdirty->left, dirty->unit_x1);
     sdirty->top = min_t(s32, sdirty->top, dirty->unit_y1);
     sdirty->right = max_t(s32, sdirty->right, dirty->unit_x2);
     sdirty->bottom = max_t(s32, sdirty->bottom, dirty->unit_y2);
 }
 
 /**
  * vmw_kms_stdu_surface_fifo_commit - Callback to fill in and submit a surface
  * copy command.
  *
  * @dirty: The closure structure.
  *
  * Fills in the missing fields in a surface copy command, and encodes a screen
  * target update command.
  */
 static void vmw_kms_stdu_surface_fifo_commit(struct vmw_kms_dirty *dirty)
 {
     struct vmw_stdu_dirty *sdirty =
         container_of(dirty, struct vmw_stdu_dirty, base);
     struct vmw_screen_target_display_unit *stdu =
         container_of(dirty->unit, typeof(*stdu), base);
     struct vmw_stdu_surface_copy *cmd = dirty->cmd;
     struct vmw_stdu_update *update;
     size_t blit_size = sizeof(SVGA3dCopyBox) * dirty->num_hits;
     size_t commit_size;
 
     if (!dirty->num_hits) {
         vmw_cmd_commit(dirty->dev_priv, 0);
         return;
     }
 
     if (sdirty->sid != stdu->display_srf->res.id) {
         struct SVGA3dCopyBox *blit = (struct SVGA3dCopyBox *) &cmd[1];
 
         cmd->header.id = SVGA_3D_CMD_SURFACE_COPY;
         cmd->header.size = sizeof(cmd->body) + blit_size;
         cmd->body.src.sid = sdirty->sid;
         cmd->body.dest.sid = stdu->display_srf->res.id;
         update = (struct vmw_stdu_update *) &blit[dirty->num_hits];
         commit_size = sizeof(*cmd) + blit_size + sizeof(*update);
         stdu->display_srf->res.res_dirty = true;
     } else {
         update = dirty->cmd;
         commit_size = sizeof(*update);
     }
 
     vmw_stdu_populate_update(update, stdu->base.unit, sdirty->left,
                  sdirty->right, sdirty->top, sdirty->bottom);
 
     vmw_cmd_commit(dirty->dev_priv, commit_size);
 
     sdirty->left = sdirty->top = S32_MAX;
     sdirty->right = sdirty->bottom = S32_MIN;
 }
 
 /**
  * vmw_kms_stdu_surface_dirty - Dirty part of a surface backed framebuffer
  *
  * @dev_priv: Pointer to the device private structure.
  * @framebuffer: Pointer to the surface-buffer backed framebuffer.
  * @clips: Array of clip rects. Either @clips or @vclips must be NULL.
  * @vclips: Alternate array of clip rects. Either @clips or @vclips must
  * be NULL.
  * @srf: Pointer to surface to blit from. If NULL, the surface attached
  * to @framebuffer will be used.
  * @dest_x: X coordinate offset to align @srf with framebuffer coordinates.
  * @dest_y: Y coordinate offset to align @srf with framebuffer coordinates.
  * @num_clips: Number of clip rects in @clips.
  * @inc: Increment to use when looping over @clips.
  * @out_fence: If non-NULL, will return a ref-counted pointer to a
  * struct vmw_fence_obj. The returned fence pointer may be NULL in which
  * case the device has already synchronized.
  * @crtc: If crtc is passed, perform surface dirty on that crtc only.
  *
  * Returns 0 on success, negative error code on failure. -ERESTARTSYS if
  * interrupted.
  */
 int vmw_kms_stdu_surface_dirty(struct vmw_private *dev_priv,
                    struct vmw_framebuffer *framebuffer,
                    struct drm_clip_rect *clips,
                    struct drm_vmw_rect *vclips,
                    struct vmw_resource *srf,
                    s32 dest_x,
                    s32 dest_y,
                    unsigned num_clips, int inc,
                    struct vmw_fence_obj **out_fence,
                    struct drm_crtc *crtc)
 {
     struct vmw_framebuffer_surface *vfbs =
         container_of(framebuffer, typeof(*vfbs), base);
     struct vmw_stdu_dirty sdirty;
     DECLARE_VAL_CONTEXT(val_ctx, NULL, 0);
     int ret;
 
     if (!srf)
         srf = &vfbs->surface->res;
 
     ret = vmw_validation_add_resource(&val_ctx, srf, 0, VMW_RES_DIRTY_NONE,
                       NULL, NULL);
     if (ret)
         return ret;
 
     ret = vmw_validation_prepare(&val_ctx, &dev_priv->cmdbuf_mutex, true);
     if (ret)
         goto out_unref;
 
     if (vfbs->is_bo_proxy) {
         ret = vmw_kms_update_proxy(srf, clips, num_clips, inc);
         if (ret)
             goto out_finish;
     }
 
     sdirty.base.fifo_commit = vmw_kms_stdu_surface_fifo_commit;
     sdirty.base.clip = vmw_kms_stdu_surface_clip;
     sdirty.base.fifo_reserve_size = sizeof(struct vmw_stdu_surface_copy) +
         sizeof(SVGA3dCopyBox) * num_clips +
         sizeof(struct vmw_stdu_update);
     sdirty.base.crtc = crtc;
     sdirty.sid = srf->id;
     sdirty.left = sdirty.top = S32_MAX;
     sdirty.right = sdirty.bottom = S32_MIN;
 
     ret = vmw_kms_helper_dirty(dev_priv, framebuffer, clips, vclips,
                    dest_x, dest_y, num_clips, inc,
                    &sdirty.base);
 out_finish:
     vmw_kms_helper_validation_finish(dev_priv, NULL, &val_ctx, out_fence,
                      NULL);
 
     return ret;
 
 out_unref:
     vmw_validation_unref_lists(&val_ctx);
     return ret;
 }
 
 
 /*
  *  Screen Target CRTC dispatch table
  */
 static const struct drm_crtc_funcs vmw_stdu_crtc_funcs = {
     .gamma_set = vmw_du_crtc_gamma_set,
     .destroy = vmw_stdu_crtc_destroy,
     .reset = vmw_du_crtc_reset,
     .atomic_duplicate_state = vmw_du_crtc_duplicate_state,
     .atomic_destroy_state = vmw_du_crtc_destroy_state,
     .set_config = drm_atomic_helper_set_config,
     .page_flip = drm_atomic_helper_page_flip,
     .get_vblank_counter = vmw_get_vblank_counter,
     .enable_vblank = vmw_enable_vblank,
     .disable_vblank = vmw_disable_vblank,
 };
 
 
 
 /******************************************************************************
  * Screen Target Display Unit Encoder Functions
  *****************************************************************************/
 
 /**
  * vmw_stdu_encoder_destroy - cleans up the STDU
  *
  * @encoder: used the get the containing STDU
  *
  * vmwgfx cleans up crtc/encoder/connector all at the same time so technically
  * this can be a no-op.  Nevertheless, it doesn't hurt of have this in case
  * the common KMS code changes and somehow vmw_stdu_crtc_destroy() doesn't
  * get called.
  */
 static void vmw_stdu_encoder_destroy(struct drm_encoder *encoder)
 {
     vmw_stdu_destroy(vmw_encoder_to_stdu(encoder));
 }
 
 static const struct drm_encoder_funcs vmw_stdu_encoder_funcs = {
     .destroy = vmw_stdu_encoder_destroy,
 };
 
 
 
 /******************************************************************************
  * Screen Target Display Unit Connector Functions
  *****************************************************************************/
 
 /**
  * vmw_stdu_connector_destroy - cleans up the STDU
  *
  * @connector: used to get the containing STDU
  *
  * vmwgfx cleans up crtc/encoder/connector all at the same time so technically
  * this can be a no-op.  Nevertheless, it doesn't hurt of have this in case
  * the common KMS code changes and somehow vmw_stdu_crtc_destroy() doesn't
  * get called.
  */
 static void vmw_stdu_connector_destroy(struct drm_connector *connector)
 {
     vmw_stdu_destroy(vmw_connector_to_stdu(connector));
 }
 
 
 
 static const struct drm_connector_funcs vmw_stdu_connector_funcs = {
     .dpms = vmw_du_connector_dpms,
     .detect = vmw_du_connector_detect,
     .fill_modes = vmw_du_connector_fill_modes,
     .destroy = vmw_stdu_connector_destroy,
     .reset = vmw_du_connector_reset,
     .atomic_duplicate_state = vmw_du_connector_duplicate_state,
     .atomic_destroy_state = vmw_du_connector_destroy_state,
 };
 
 
 static const struct
 drm_connector_helper_funcs vmw_stdu_connector_helper_funcs = {
 };
 
 
 
 /******************************************************************************
  * Screen Target Display Plane Functions
  *****************************************************************************/
 
 
 
 /**
  * vmw_stdu_primary_plane_cleanup_fb - Unpins the display surface
  *
  * @plane:  display plane
  * @old_state: Contains the FB to clean up
  *
  * Unpins the display surface
  *
  * Returns 0 on success
  */
 static void
 vmw_stdu_primary_plane_cleanup_fb(struct drm_plane *plane,
                   struct drm_plane_state *old_state)
 {
     struct vmw_plane_state *vps = vmw_plane_state_to_vps(old_state);
 
     if (vps->surf)
         WARN_ON(!vps->pinned);
 
     vmw_du_plane_cleanup_fb(plane, old_state);
 
     vps->content_fb_type = SAME_AS_DISPLAY;
     vps->cpp = 0;
 }
 
 
 
 /**
  * vmw_stdu_primary_plane_prepare_fb - Readies the display surface
  *
  * @plane:  display plane
  * @new_state: info on the new plane state, including the FB
  *
  * This function allocates a new display surface if the content is
  * backed by a buffer object.  The display surface is pinned here, and it'll
  * be unpinned in .cleanup_fb()
  *
  * Returns 0 on success
  */
 static int
 vmw_stdu_primary_plane_prepare_fb(struct drm_plane *plane,
                   struct drm_plane_state *new_state)
 {
     struct vmw_private *dev_priv = vmw_priv(plane->dev);
     struct drm_framebuffer *new_fb = new_state->fb;
     struct vmw_framebuffer *vfb;
     struct vmw_plane_state *vps = vmw_plane_state_to_vps(new_state);
     enum stdu_content_type new_content_type;
     struct vmw_framebuffer_surface *new_vfbs;
     uint32_t hdisplay = new_state->crtc_w, vdisplay = new_state->crtc_h;
     int ret;
 
     /* No FB to prepare */
     if (!new_fb) {
         if (vps->surf) {
             WARN_ON(vps->pinned != 0);
             vmw_surface_unreference(&vps->surf);
         }
 
         return 0;
     }
 
     vfb = vmw_framebuffer_to_vfb(new_fb);
     new_vfbs = (vfb->bo) ? NULL : vmw_framebuffer_to_vfbs(new_fb);
 
     if (new_vfbs &&
         new_vfbs->surface->metadata.base_size.width == hdisplay &&
         new_vfbs->surface->metadata.base_size.height == vdisplay)
         new_content_type = SAME_AS_DISPLAY;
     else if (vfb->bo)
         new_content_type = SEPARATE_BO;
     else
         new_content_type = SEPARATE_SURFACE;
 
     if (new_content_type != SAME_AS_DISPLAY) {
         struct vmw_surface_metadata metadata = {0};
 
         /*
          * If content buffer is a buffer object, then we have to
          * construct surface info
          */
         if (new_content_type == SEPARATE_BO) {
 
             switch (new_fb->format->cpp[0]*8) {
             case 32:
                 metadata.format = SVGA3D_X8R8G8B8;
                 break;
 
             case 16:
                 metadata.format = SVGA3D_R5G6B5;
                 break;
 
             case 8:
                 metadata.format = SVGA3D_P8;
                 break;
 
             default:
                 DRM_ERROR("Invalid format\n");
                 return -EINVAL;
             }
 
             metadata.mip_levels[0] = 1;
             metadata.num_sizes = 1;
             metadata.scanout = true;
         } else {
             metadata = new_vfbs->surface->metadata;
         }
 
         metadata.base_size.width = hdisplay;
         metadata.base_size.height = vdisplay;
         metadata.base_size.depth = 1;
 
         if (vps->surf) {
             struct drm_vmw_size cur_base_size =
                 vps->surf->metadata.base_size;
 
             if (cur_base_size.width != metadata.base_size.width ||
                 cur_base_size.height != metadata.base_size.height ||
                 vps->surf->metadata.format != metadata.format) {
                 WARN_ON(vps->pinned != 0);
                 vmw_surface_unreference(&vps->surf);
             }
 
         }
 
         if (!vps->surf) {
             ret = vmw_gb_surface_define(dev_priv, &metadata,
                             &vps->surf);
             if (ret != 0) {
                 DRM_ERROR("Couldn't allocate STDU surface.\n");
                 return ret;
             }
         }
     } else {
         /*
          * prepare_fb and clean_fb should only take care of pinning
          * and unpinning.  References are tracked by state objects.
          * The only time we add a reference in prepare_fb is if the
          * state object doesn't have a reference to begin with
          */
         if (vps->surf) {
             WARN_ON(vps->pinned != 0);
             vmw_surface_unreference(&vps->surf);
         }
 
         vps->surf = vmw_surface_reference(new_vfbs->surface);
     }
 
     if (vps->surf) {
 
         /* Pin new surface before flipping */
         ret = vmw_resource_pin(&vps->surf->res, false);
         if (ret)
             goto out_srf_unref;
 
         vps->pinned++;
     }
 
     vps->content_fb_type = new_content_type;
 
     /*
      * This should only happen if the buffer object is too large to create a
      * proxy surface for.
      * If we are a 2D VM with a buffer object then we have to use CPU blit
      * so cache these mappings
      */
     if (vps->content_fb_type == SEPARATE_BO &&
         vmw_stdu_use_cpu_blit(dev_priv))
         vps->cpp = new_fb->pitches[0] / new_fb->width;
 
     return 0;
 
 out_srf_unref:
     vmw_surface_unreference(&vps->surf);
     return ret;
 }
 
 static uint32_t vmw_stdu_bo_fifo_size(struct vmw_du_update_plane *update,
                       uint32_t num_hits)
 {
     return sizeof(struct vmw_stdu_dma) + sizeof(SVGA3dCopyBox) * num_hits +
         sizeof(SVGA3dCmdSurfaceDMASuffix) +
         sizeof(struct vmw_stdu_update);
 }
 
 static uint32_t vmw_stdu_bo_fifo_size_cpu(struct vmw_du_update_plane *update,
                       uint32_t num_hits)
 {
     return sizeof(struct vmw_stdu_update_gb_image) +
         sizeof(struct vmw_stdu_update);
 }
 
 static uint32_t vmw_stdu_bo_populate_dma(struct vmw_du_update_plane  *update,
                      void *cmd, uint32_t num_hits)
 {
     struct vmw_screen_target_display_unit *stdu;
     struct vmw_framebuffer_bo *vfbbo;
     struct vmw_stdu_dma *cmd_dma = cmd;
 
     stdu = container_of(update->du, typeof(*stdu), base);
     vfbbo = container_of(update->vfb, typeof(*vfbbo), base);
 
     cmd_dma->header.id = SVGA_3D_CMD_SURFACE_DMA;
     cmd_dma->header.size = sizeof(cmd_dma->body) +
         sizeof(struct SVGA3dCopyBox) * num_hits +
         sizeof(SVGA3dCmdSurfaceDMASuffix);
     vmw_bo_get_guest_ptr(&vfbbo->buffer->base, &cmd_dma->body.guest.ptr);
     cmd_dma->body.guest.pitch = update->vfb->base.pitches[0];
     cmd_dma->body.host.sid = stdu->display_srf->res.id;
     cmd_dma->body.host.face = 0;
     cmd_dma->body.host.mipmap = 0;
     cmd_dma->body.transfer = SVGA3D_WRITE_HOST_VRAM;
 
     return sizeof(*cmd_dma);
 }
 
 static uint32_t vmw_stdu_bo_populate_clip(struct vmw_du_update_plane  *update,
                       void *cmd, struct drm_rect *clip,
                       uint32_t fb_x, uint32_t fb_y)
 {
     struct SVGA3dCopyBox *box = cmd;
 
     box->srcx = fb_x;
     box->srcy = fb_y;
     box->srcz = 0;
     box->x = clip->x1;
     box->y = clip->y1;
     box->z = 0;
     box->w = drm_rect_width(clip);
     box->h = drm_rect_height(clip);
     box->d = 1;
 
     return sizeof(*box);
 }
 
 static uint32_t vmw_stdu_bo_populate_update(struct vmw_du_update_plane  *update,
                         void *cmd, struct drm_rect *bb)
 {
     struct vmw_screen_target_display_unit *stdu;
     struct vmw_framebuffer_bo *vfbbo;
     SVGA3dCmdSurfaceDMASuffix *suffix = cmd;
 
     stdu = container_of(update->du, typeof(*stdu), base);
     vfbbo = container_of(update->vfb, typeof(*vfbbo), base);
 
     suffix->suffixSize = sizeof(*suffix);
     suffix->maximumOffset = vfbbo->buffer->base.base.size;
 
     vmw_stdu_populate_update(&suffix[1], stdu->base.unit, bb->x1, bb->x2,
                  bb->y1, bb->y2);
 
     return sizeof(*suffix) + sizeof(struct vmw_stdu_update);
 }
 
 static uint32_t vmw_stdu_bo_pre_clip_cpu(struct vmw_du_update_plane  *update,
                      void *cmd, uint32_t num_hits)
 {
     struct vmw_du_update_plane_buffer *bo_update =
         container_of(update, typeof(*bo_update), base);
 
     bo_update->fb_left = INT_MAX;
     bo_update->fb_top = INT_MAX;
 
     return 0;
 }
 
 static uint32_t vmw_stdu_bo_clip_cpu(struct vmw_du_update_plane  *update,
                      void *cmd, struct drm_rect *clip,
                      uint32_t fb_x, uint32_t fb_y)
 {
     struct vmw_du_update_plane_buffer *bo_update =
         container_of(update, typeof(*bo_update), base);
 
     bo_update->fb_left = min_t(int, bo_update->fb_left, fb_x);
     bo_update->fb_top = min_t(int, bo_update->fb_top, fb_y);
 
     return 0;
 }
 
 static uint32_t
 vmw_stdu_bo_populate_update_cpu(struct vmw_du_update_plane  *update, void *cmd,
                 struct drm_rect *bb)
 {
     struct vmw_du_update_plane_buffer *bo_update;
     struct vmw_screen_target_display_unit *stdu;
     struct vmw_framebuffer_bo *vfbbo;
     struct vmw_diff_cpy diff = VMW_CPU_BLIT_DIFF_INITIALIZER(0);
     struct vmw_stdu_update_gb_image *cmd_img = cmd;
     struct vmw_stdu_update *cmd_update;
     struct ttm_buffer_object *src_bo, *dst_bo;
     u32 src_offset, dst_offset;
     s32 src_pitch, dst_pitch;
     s32 width, height;
 
     bo_update = container_of(update, typeof(*bo_update), base);
     stdu = container_of(update->du, typeof(*stdu), base);
     vfbbo = container_of(update->vfb, typeof(*vfbbo), base);
 
     width = bb->x2 - bb->x1;
     height = bb->y2 - bb->y1;
 
     diff.cpp = stdu->cpp;
 
     dst_bo = &stdu->display_srf->res.backup->base;
     dst_pitch = stdu->display_srf->metadata.base_size.width * stdu->cpp;
     dst_offset = bb->y1 * dst_pitch + bb->x1 * stdu->cpp;
 
     src_bo = &vfbbo->buffer->base;
     src_pitch = update->vfb->base.pitches[0];
     src_offset = bo_update->fb_top * src_pitch + bo_update->fb_left *
         stdu->cpp;
 
     (void) vmw_bo_cpu_blit(dst_bo, dst_offset, dst_pitch, src_bo,
                    src_offset, src_pitch, width * stdu->cpp, height,
                    &diff);
 
     if (drm_rect_visible(&diff.rect)) {
         SVGA3dBox *box = &cmd_img->body.box;
 
         cmd_img->header.id = SVGA_3D_CMD_UPDATE_GB_IMAGE;
         cmd_img->header.size = sizeof(cmd_img->body);
         cmd_img->body.image.sid = stdu->display_srf->res.id;
         cmd_img->body.image.face = 0;
         cmd_img->body.image.mipmap = 0;
 
         box->x = diff.rect.x1;
         box->y = diff.rect.y1;
         box->z = 0;
         box->w = drm_rect_width(&diff.rect);
         box->h = drm_rect_height(&diff.rect);
         box->d = 1;
 
         cmd_update = (struct vmw_stdu_update *)&cmd_img[1];
         vmw_stdu_populate_update(cmd_update, stdu->base.unit,
                      diff.rect.x1, diff.rect.x2,
                      diff.rect.y1, diff.rect.y2);
 
         return sizeof(*cmd_img) + sizeof(*cmd_update);
     }
 
     return 0;
 }
 
 /**
  * vmw_stdu_plane_update_bo - Update display unit for bo backed fb.
  * @dev_priv: device private.
  * @plane: plane state.
  * @old_state: old plane state.
  * @vfb: framebuffer which is blitted to display unit.
  * @out_fence: If non-NULL, will return a ref-counted pointer to vmw_fence_obj.
  *             The returned fence pointer may be NULL in which case the device
  *             has already synchronized.
  *
  * Return: 0 on success or a negative error code on failure.
  */
 static int vmw_stdu_plane_update_bo(struct vmw_private *dev_priv,
                     struct drm_plane *plane,
                     struct drm_plane_state *old_state,
                     struct vmw_framebuffer *vfb,
                     struct vmw_fence_obj **out_fence)
 {
     struct vmw_du_update_plane_buffer bo_update;
 
     memset(&bo_update, 0, sizeof(struct vmw_du_update_plane_buffer));
     bo_update.base.plane = plane;
     bo_update.base.old_state = old_state;
     bo_update.base.dev_priv = dev_priv;
     bo_update.base.du = vmw_crtc_to_du(plane->state->crtc);
     bo_update.base.vfb = vfb;
     bo_update.base.out_fence = out_fence;
     bo_update.base.mutex = NULL;
     bo_update.base.cpu_blit = vmw_stdu_use_cpu_blit(dev_priv);
     bo_update.base.intr = false;
 
     /*
      * VM without 3D support don't have surface DMA command and framebuffer
      * should be moved out of VRAM.
      */
     if (bo_update.base.cpu_blit) {
         bo_update.base.calc_fifo_size = vmw_stdu_bo_fifo_size_cpu;
         bo_update.base.pre_clip = vmw_stdu_bo_pre_clip_cpu;
         bo_update.base.clip = vmw_stdu_bo_clip_cpu;
         bo_update.base.post_clip = vmw_stdu_bo_populate_update_cpu;
     } else {
         bo_update.base.calc_fifo_size = vmw_stdu_bo_fifo_size;
         bo_update.base.pre_clip = vmw_stdu_bo_populate_dma;
         bo_update.base.clip = vmw_stdu_bo_populate_clip;
         bo_update.base.post_clip = vmw_stdu_bo_populate_update;
     }
 
     return vmw_du_helper_plane_update(&bo_update.base);
 }
 
 static uint32_t
 vmw_stdu_surface_fifo_size_same_display(struct vmw_du_update_plane *update,
                     uint32_t num_hits)
 {
     struct vmw_framebuffer_surface *vfbs;
     uint32_t size = 0;
 
     vfbs = container_of(update->vfb, typeof(*vfbs), base);
 
     if (vfbs->is_bo_proxy)
         size += sizeof(struct vmw_stdu_update_gb_image) * num_hits;
 
     size += sizeof(struct vmw_stdu_update);
 
     return size;
 }
 
 static uint32_t vmw_stdu_surface_fifo_size(struct vmw_du_update_plane *update,
                        uint32_t num_hits)
 {
     struct vmw_framebuffer_surface *vfbs;
     uint32_t size = 0;
 
     vfbs = container_of(update->vfb, typeof(*vfbs), base);
 
     if (vfbs->is_bo_proxy)
         size += sizeof(struct vmw_stdu_update_gb_image) * num_hits;
 
     size += sizeof(struct vmw_stdu_surface_copy) + sizeof(SVGA3dCopyBox) *
         num_hits + sizeof(struct vmw_stdu_update);
 
     return size;
 }
 
 static uint32_t
 vmw_stdu_surface_update_proxy(struct vmw_du_update_plane *update, void *cmd)
 {
     struct vmw_framebuffer_surface *vfbs;
     struct drm_plane_state *state = update->plane->state;
     struct drm_plane_state *old_state = update->old_state;
     struct vmw_stdu_update_gb_image *cmd_update = cmd;
     struct drm_atomic_helper_damage_iter iter;
     struct drm_rect clip;
     uint32_t copy_size = 0;
 
     vfbs = container_of(update->vfb, typeof(*vfbs), base);
 
     /*
      * proxy surface is special where a buffer object type fb is wrapped
      * in a surface and need an update gb image command to sync with device.
      */
     drm_atomic_helper_damage_iter_init(&iter, old_state, state);
     drm_atomic_for_each_plane_damage(&iter, &clip) {
         SVGA3dBox *box = &cmd_update->body.box;
 
         cmd_update->header.id = SVGA_3D_CMD_UPDATE_GB_IMAGE;
         cmd_update->header.size = sizeof(cmd_update->body);
         cmd_update->body.image.sid = vfbs->surface->res.id;
         cmd_update->body.image.face = 0;
         cmd_update->body.image.mipmap = 0;
 
         box->x = clip.x1;
         box->y = clip.y1;
         box->z = 0;
         box->w = drm_rect_width(&clip);
         box->h = drm_rect_height(&clip);
         box->d = 1;
 
         copy_size += sizeof(*cmd_update);
         cmd_update++;
     }
 
     return copy_size;
 }
 
 static uint32_t
 vmw_stdu_surface_populate_copy(struct vmw_du_update_plane  *update, void *cmd,
                    uint32_t num_hits)
 {
     struct vmw_screen_target_display_unit *stdu;
     struct vmw_framebuffer_surface *vfbs;
     struct vmw_stdu_surface_copy *cmd_copy = cmd;
 
     stdu = container_of(update->du, typeof(*stdu), base);
     vfbs = container_of(update->vfb, typeof(*vfbs), base);
 
     cmd_copy->header.id = SVGA_3D_CMD_SURFACE_COPY;
     cmd_copy->header.size = sizeof(cmd_copy->body) + sizeof(SVGA3dCopyBox) *
         num_hits;
     cmd_copy->body.src.sid = vfbs->surface->res.id;
     cmd_copy->body.dest.sid = stdu->display_srf->res.id;
 
     return sizeof(*cmd_copy);
 }
 
 static uint32_t
 vmw_stdu_surface_populate_clip(struct vmw_du_update_plane  *update, void *cmd,
                    struct drm_rect *clip, uint32_t fb_x,
                    uint32_t fb_y)
 {
     struct SVGA3dCopyBox *box = cmd;
 
     box->srcx = fb_x;
     box->srcy = fb_y;
     box->srcz = 0;
     box->x = clip->x1;
     box->y = clip->y1;
     box->z = 0;
     box->w = drm_rect_width(clip);
     box->h = drm_rect_height(clip);
     box->d = 1;
 
     return sizeof(*box);
 }
 
 static uint32_t
 vmw_stdu_surface_populate_update(struct vmw_du_update_plane  *update, void *cmd,
                  struct drm_rect *bb)
 {
     vmw_stdu_populate_update(cmd, update->du->unit, bb->x1, bb->x2, bb->y1,
                  bb->y2);
 
     return sizeof(struct vmw_stdu_update);
 }
 
 /**
  * vmw_stdu_plane_update_surface - Update display unit for surface backed fb
  * @dev_priv: Device private
  * @plane: Plane state
  * @old_state: Old plane state
  * @vfb: Framebuffer which is blitted to display unit
  * @out_fence: If non-NULL, will return a ref-counted pointer to vmw_fence_obj.
  *             The returned fence pointer may be NULL in which case the device
  *             has already synchronized.
  *
  * Return: 0 on success or a negative error code on failure.
  */
 static int vmw_stdu_plane_update_surface(struct vmw_private *dev_priv,
                      struct drm_plane *plane,
                      struct drm_plane_state *old_state,
                      struct vmw_framebuffer *vfb,
                      struct vmw_fence_obj **out_fence)
 {
     struct vmw_du_update_plane srf_update;
     struct vmw_screen_target_display_unit *stdu;
     struct vmw_framebuffer_surface *vfbs;
 
     stdu = vmw_crtc_to_stdu(plane->state->crtc);
     vfbs = container_of(vfb, typeof(*vfbs), base);
 
     memset(&srf_update, 0, sizeof(struct vmw_du_update_plane));
     srf_update.plane = plane;
     srf_update.old_state = old_state;
     srf_update.dev_priv = dev_priv;
     srf_update.du = vmw_crtc_to_du(plane->state->crtc);
     srf_update.vfb = vfb;
     srf_update.out_fence = out_fence;
     srf_update.mutex = &dev_priv->cmdbuf_mutex;
     srf_update.cpu_blit = false;
     srf_update.intr = true;
 
     if (vfbs->is_bo_proxy)
         srf_update.post_prepare = vmw_stdu_surface_update_proxy;
 
     if (vfbs->surface->res.id != stdu->display_srf->res.id) {
         srf_update.calc_fifo_size = vmw_stdu_surface_fifo_size;
         srf_update.pre_clip = vmw_stdu_surface_populate_copy;
         srf_update.clip = vmw_stdu_surface_populate_clip;
     } else {
         srf_update.calc_fifo_size =
             vmw_stdu_surface_fifo_size_same_display;
     }
 
     srf_update.post_clip = vmw_stdu_surface_populate_update;
 
     return vmw_du_helper_plane_update(&srf_update);
 }
 
 /**
  * vmw_stdu_primary_plane_atomic_update - formally switches STDU to new plane
  * @plane: display plane
  * @state: Only used to get crtc info
  *
  * Formally update stdu->display_srf to the new plane, and bind the new
  * plane STDU.  This function is called during the commit phase when
  * all the preparation have been done and all the configurations have
  * been checked.
  */
 static void
 vmw_stdu_primary_plane_atomic_update(struct drm_plane *plane,
                      struct drm_atomic_state *state)
 {
     struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, plane);
     struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane);
     struct vmw_plane_state *vps = vmw_plane_state_to_vps(new_state);
     struct drm_crtc *crtc = new_state->crtc;
     struct vmw_screen_target_display_unit *stdu;
     struct drm_pending_vblank_event *event;
     struct vmw_fence_obj *fence = NULL;
     struct vmw_private *dev_priv;
     int ret;
 
     /* If case of device error, maintain consistent atomic state */
     if (crtc && new_state->fb) {
         struct vmw_framebuffer *vfb =
             vmw_framebuffer_to_vfb(new_state->fb);
         stdu = vmw_crtc_to_stdu(crtc);
         dev_priv = vmw_priv(crtc->dev);
 
         stdu->display_srf = vps->surf;
         stdu->content_fb_type = vps->content_fb_type;
         stdu->cpp = vps->cpp;
 
         ret = vmw_stdu_bind_st(dev_priv, stdu, &stdu->display_srf->res);
         if (ret)
             DRM_ERROR("Failed to bind surface to STDU.\n");
 
         if (vfb->bo)
             ret = vmw_stdu_plane_update_bo(dev_priv, plane,
                                old_state, vfb, &fence);
         else
             ret = vmw_stdu_plane_update_surface(dev_priv, plane,
                                 old_state, vfb,
                                 &fence);
         if (ret)
             DRM_ERROR("Failed to update STDU.\n");
     } else {
         crtc = old_state->crtc;
         stdu = vmw_crtc_to_stdu(crtc);
         dev_priv = vmw_priv(crtc->dev);
 
         /* Blank STDU when fb and crtc are NULL */
         if (!stdu->defined)
             return;
 
         ret = vmw_stdu_bind_st(dev_priv, stdu, NULL);
         if (ret)
             DRM_ERROR("Failed to blank STDU\n");
 
         ret = vmw_stdu_update_st(dev_priv, stdu);
         if (ret)
             DRM_ERROR("Failed to update STDU.\n");
 
         return;
     }
 
     /* In case of error, vblank event is send in vmw_du_crtc_atomic_flush */
     event = crtc->state->event;
     if (event && fence) {
         struct drm_file *file_priv = event->base.file_priv;
 
         ret = vmw_event_fence_action_queue(file_priv,
                            fence,
                            &event->base,
                            &event->event.vbl.tv_sec,
                            &event->event.vbl.tv_usec,
                            true);
         if (ret)
             DRM_ERROR("Failed to queue event on fence.\n");
         else
             crtc->state->event = NULL;
     }
 
     if (fence)
         vmw_fence_obj_unreference(&fence);
 }
 
 
 static const struct drm_plane_funcs vmw_stdu_plane_funcs = {
     .update_plane = drm_atomic_helper_update_plane,
     .disable_plane = drm_atomic_helper_disable_plane,
     .destroy = vmw_du_primary_plane_destroy,
     .reset = vmw_du_plane_reset,
     .atomic_duplicate_state = vmw_du_plane_duplicate_state,
     .atomic_destroy_state = vmw_du_plane_destroy_state,
 };
 
 static const struct drm_plane_funcs vmw_stdu_cursor_funcs = {
     .update_plane = drm_atomic_helper_update_plane,
     .disable_plane = drm_atomic_helper_disable_plane,
     .destroy = vmw_du_cursor_plane_destroy,
     .reset = vmw_du_plane_reset,
     .atomic_duplicate_state = vmw_du_plane_duplicate_state,
     .atomic_destroy_state = vmw_du_plane_destroy_state,
 };
 
 
 /*
  * Atomic Helpers
  */
 static const struct
 drm_plane_helper_funcs vmw_stdu_cursor_plane_helper_funcs = {
     .atomic_check = vmw_du_cursor_plane_atomic_check,
     .atomic_update = vmw_du_cursor_plane_atomic_update,
     .prepare_fb = vmw_du_cursor_plane_prepare_fb,
     .cleanup_fb = vmw_du_cursor_plane_cleanup_fb,
 };
 
 static const struct
 drm_plane_helper_funcs vmw_stdu_primary_plane_helper_funcs = {
     .atomic_check = vmw_du_primary_plane_atomic_check,
     .atomic_update = vmw_stdu_primary_plane_atomic_update,
     .prepare_fb = vmw_stdu_primary_plane_prepare_fb,
     .cleanup_fb = vmw_stdu_primary_plane_cleanup_fb,
 };
 
 static const struct drm_crtc_helper_funcs vmw_stdu_crtc_helper_funcs = {
     .prepare = vmw_stdu_crtc_helper_prepare,
     .mode_set_nofb = vmw_stdu_crtc_mode_set_nofb,
     .atomic_check = vmw_du_crtc_atomic_check,
     .atomic_begin = vmw_du_crtc_atomic_begin,
     .atomic_flush = vmw_du_crtc_atomic_flush,
     .atomic_enable = vmw_stdu_crtc_atomic_enable,
     .atomic_disable = vmw_stdu_crtc_atomic_disable,
 };
 
 
 /**
  * vmw_stdu_init - Sets up a Screen Target Display Unit
  *
  * @dev_priv: VMW DRM device
  * @unit: unit number range from 0 to VMWGFX_NUM_DISPLAY_UNITS
  *
  * This function is called once per CRTC, and allocates one Screen Target
  * display unit to represent that CRTC.  Since the SVGA device does not separate
  * out encoder and connector, they are represented as part of the STDU as well.
  */
 static int vmw_stdu_init(struct vmw_private *dev_priv, unsigned unit)
 {
     struct vmw_screen_target_display_unit *stdu;
     struct drm_device *dev = &dev_priv->drm;
     struct drm_connector *connector;
     struct drm_encoder *encoder;
     struct drm_plane *primary;
     struct vmw_cursor_plane *cursor;
     struct drm_crtc *crtc;
     int    ret;
 
     stdu = kzalloc(sizeof(*stdu), GFP_KERNEL);
     if (!stdu)
         return -ENOMEM;
 
     stdu->base.unit = unit;
     crtc = &stdu->base.crtc;
     encoder = &stdu->base.encoder;
     connector = &stdu->base.connector;
     primary = &stdu->base.primary;
     cursor = &stdu->base.cursor;
 
     stdu->base.pref_active = (unit == 0);
     stdu->base.pref_width  = dev_priv->initial_width;
     stdu->base.pref_height = dev_priv->initial_height;
     stdu->base.is_implicit = false;
 
     /* Initialize primary plane */
     ret = drm_universal_plane_init(dev, primary,
                        0, &vmw_stdu_plane_funcs,
                        vmw_primary_plane_formats,
                        ARRAY_SIZE(vmw_primary_plane_formats),
                        NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
     if (ret) {
         DRM_ERROR("Failed to initialize primary plane");
         goto err_free;
     }
 
     drm_plane_helper_add(primary, &vmw_stdu_primary_plane_helper_funcs);
     drm_plane_enable_fb_damage_clips(primary);
 
     /* Initialize cursor plane */
     ret = drm_universal_plane_init(dev, &cursor->base,
             0, &vmw_stdu_cursor_funcs,
             vmw_cursor_plane_formats,
             ARRAY_SIZE(vmw_cursor_plane_formats),
             NULL, DRM_PLANE_TYPE_CURSOR, NULL);
     if (ret) {
         DRM_ERROR("Failed to initialize cursor plane");
         drm_plane_cleanup(&stdu->base.primary);
         goto err_free;
     }
 
     drm_plane_helper_add(&cursor->base, &vmw_stdu_cursor_plane_helper_funcs);
 
     ret = drm_connector_init(dev, connector, &vmw_stdu_connector_funcs,
                  DRM_MODE_CONNECTOR_VIRTUAL);
     if (ret) {
         DRM_ERROR("Failed to initialize connector\n");
         goto err_free;
     }
 
     drm_connector_helper_add(connector, &vmw_stdu_connector_helper_funcs);
     connector->status = vmw_du_connector_detect(connector, false);
 
     ret = drm_encoder_init(dev, encoder, &vmw_stdu_encoder_funcs,
                    DRM_MODE_ENCODER_VIRTUAL, NULL);
     if (ret) {
         DRM_ERROR("Failed to initialize encoder\n");
         goto err_free_connector;
     }
 
     (void) drm_connector_attach_encoder(connector, encoder);
     encoder->possible_crtcs = (1 << unit);
     encoder->possible_clones = 0;
 
     ret = drm_connector_register(connector);
     if (ret) {
         DRM_ERROR("Failed to register connector\n");
         goto err_free_encoder;
     }
 
     ret = drm_crtc_init_with_planes(dev, crtc, primary,
                     &cursor->base,
                     &vmw_stdu_crtc_funcs, NULL);
     if (ret) {
         DRM_ERROR("Failed to initialize CRTC\n");
         goto err_free_unregister;
     }
 
     drm_crtc_helper_add(crtc, &vmw_stdu_crtc_helper_funcs);
 
     drm_mode_crtc_set_gamma_size(crtc, 256);
 
     drm_object_attach_property(&connector->base,
                    dev_priv->hotplug_mode_update_property, 1);
     drm_object_attach_property(&connector->base,
                    dev->mode_config.suggested_x_property, 0);
     drm_object_attach_property(&connector->base,
                    dev->mode_config.suggested_y_property, 0);
     return 0;
 
 err_free_unregister:
     drm_connector_unregister(connector);
 err_free_encoder:
     drm_encoder_cleanup(encoder);
 err_free_connector:
     drm_connector_cleanup(connector);
 err_free:
     kfree(stdu);
     return ret;
 }
 
 
 
 /**
  *  vmw_stdu_destroy - Cleans up a vmw_screen_target_display_unit
  *
  *  @stdu:  Screen Target Display Unit to be destroyed
  *
  *  Clean up after vmw_stdu_init
  */
 static void vmw_stdu_destroy(struct vmw_screen_target_display_unit *stdu)
 {
     vmw_du_cleanup(&stdu->base);
     kfree(stdu);
 }
 
 
 
 /******************************************************************************
  * Screen Target Display KMS Functions
  *
  * These functions are called by the common KMS code in vmwgfx_kms.c
  *****************************************************************************/
 
 /**
  * vmw_kms_stdu_init_display - Initializes a Screen Target based display
  *
  * @dev_priv: VMW DRM device
  *
  * This function initialize a Screen Target based display device.  It checks
  * the capability bits to make sure the underlying hardware can support
  * screen targets, and then creates the maximum number of CRTCs, a.k.a Display
  * Units, as supported by the display hardware.
  *
  * RETURNS:
  * 0 on success, error code otherwise
  */
 int vmw_kms_stdu_init_display(struct vmw_private *dev_priv)
 {
     struct drm_device *dev = &dev_priv->drm;
     int i, ret;
 
 
     /* Do nothing if there's no support for MOBs */
     if (!dev_priv->has_mob)
         return -ENOSYS;
 
     if (!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS))
         return -ENOSYS;
 
     ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
     if (unlikely(ret != 0))
         return ret;
 
     dev_priv->active_display_unit = vmw_du_screen_target;
 
     for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i) {
         ret = vmw_stdu_init(dev_priv, i);
 
         if (unlikely(ret != 0)) {
             drm_err(&dev_priv->drm,
                 "Failed to initialize STDU %d", i);
             return ret;
         }
     }
 
     drm_mode_config_reset(dev);
 
     return 0;
 }

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