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/**************************************************************************

 *

 * Copyright © 2011-2015 VMware, Inc., Palo Alto, CA., USA

 * All Rights Reserved.

 *

 * 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 "vmwgfx_kms.h"

#include 

#define vmw_crtc_to_sou(x) \

	container_of(x, struct vmw_screen_object_unit, base.crtc)

#define vmw_encoder_to_sou(x) \

	container_of(x, struct vmw_screen_object_unit, base.encoder)

#define vmw_connector_to_sou(x) \

	container_of(x, struct vmw_screen_object_unit, base.connector)

/**

 * struct vmw_kms_sou_surface_dirty - Closure structure for

 * blit surface to screen command.

 * @base: The base type we derive from. Used by vmw_kms_helper_dirty().

 * @left: Left side of bounding box.

 * @right: Right side of bounding box.

 * @top: Top side of bounding box.

 * @bottom: Bottom side of bounding box.

 * @dst_x: Difference between source clip rects and framebuffer coordinates.

 * @dst_y: Difference between source clip rects and framebuffer coordinates.

 * @sid: Surface id of surface to copy from.

 */

struct vmw_kms_sou_surface_dirty {

	struct vmw_kms_dirty base;

	s32 left, right, top, bottom;

	s32 dst_x, dst_y;

	u32 sid;

};

/*

 * SVGA commands that are used by this code. Please see the device headers

 * for explanation.

 */

struct vmw_kms_sou_readback_blit {

	uint32 header;

	SVGAFifoCmdBlitScreenToGMRFB body;

};

struct vmw_kms_sou_dmabuf_blit {

	uint32 header;

	SVGAFifoCmdBlitGMRFBToScreen body;

};

struct vmw_kms_sou_dirty_cmd {

	SVGA3dCmdHeader header;

	SVGA3dCmdBlitSurfaceToScreen body;

};

/*

 * Other structs.

 */

struct vmw_screen_object_display {

	unsigned num_implicit;

	struct vmw_framebuffer *implicit_fb;

	SVGAFifoCmdDefineGMRFB cur;

	struct vmw_dma_buffer *pinned_gmrfb;

};

/**

 * Display unit using screen objects.

 */

struct vmw_screen_object_unit {

	struct vmw_display_unit base;

	unsigned long buffer_size; /**< Size of allocated buffer */

	struct vmw_dma_buffer *buffer; /**< Backing store buffer */

	bool defined;

	bool active_implicit;

};

static void vmw_sou_destroy(struct vmw_screen_object_unit *sou)

{

	vmw_du_cleanup(&sou->base);

	kfree(sou);

}

/*

 * Screen Object Display Unit CRTC functions

 */

static void vmw_sou_crtc_destroy(struct drm_crtc *crtc)

{

	vmw_sou_destroy(vmw_crtc_to_sou(crtc));

}

static void vmw_sou_del_active(struct vmw_private *vmw_priv,

			       struct vmw_screen_object_unit *sou)

{

	struct vmw_screen_object_display *ld = vmw_priv->sou_priv;

	if (sou->active_implicit) {

		if (--(ld->num_implicit) == 0)

			ld->implicit_fb = NULL;

		sou->active_implicit = false;

	}

}

static void vmw_sou_add_active(struct vmw_private *vmw_priv,

			       struct vmw_screen_object_unit *sou,

			       struct vmw_framebuffer *vfb)

{

	struct vmw_screen_object_display *ld = vmw_priv->sou_priv;

	BUG_ON(!ld->num_implicit && ld->implicit_fb);

	if (!sou->active_implicit && sou->base.is_implicit) {

		ld->implicit_fb = vfb;

		sou->active_implicit = true;

		ld->num_implicit++;

	}

}

/**

 * Send the fifo command to create a screen.

 */

static int vmw_sou_fifo_create(struct vmw_private *dev_priv,

			       struct vmw_screen_object_unit *sou,

			       uint32_t x, uint32_t y,

			       struct drm_display_mode *mode)

{

	size_t fifo_size;

	struct {

		struct {

			uint32_t cmdType;

		} header;

		SVGAScreenObject obj;

	} *cmd;

	BUG_ON(!sou->buffer);

	fifo_size = sizeof(*cmd);

	cmd = vmw_fifo_reserve(dev_priv, fifo_size);

	/* The hardware has hung, nothing we can do about it here. */

	if (unlikely(cmd == NULL)) {

		DRM_ERROR("Fifo reserve failed.\n");

		return -ENOMEM;

	}

	memset(cmd, 0, fifo_size);

	cmd->header.cmdType = SVGA_CMD_DEFINE_SCREEN;

	cmd->obj.structSize = sizeof(SVGAScreenObject);

	cmd->obj.id = sou->base.unit;

	cmd->obj.flags = SVGA_SCREEN_HAS_ROOT |

		(sou->base.unit == 0 ? SVGA_SCREEN_IS_PRIMARY : 0);

	cmd->obj.size.width = mode->hdisplay;

	cmd->obj.size.height = mode->vdisplay;

	if (sou->base.is_implicit) {

		cmd->obj.root.x = x;

		cmd->obj.root.y = y;

	} else {

		cmd->obj.root.x = sou->base.gui_x;

		cmd->obj.root.y = sou->base.gui_y;

	}

	/* Ok to assume that buffer is pinned in vram */

	vmw_bo_get_guest_ptr(&sou->buffer->base, &cmd->obj.backingStore.ptr);

	cmd->obj.backingStore.pitch = mode->hdisplay * 4;

	vmw_fifo_commit(dev_priv, fifo_size);

	sou->defined = true;

	return 0;

}

/**

 * Send the fifo command to destroy a screen.

 */

static int vmw_sou_fifo_destroy(struct vmw_private *dev_priv,

				struct vmw_screen_object_unit *sou)

{

	size_t fifo_size;

	int ret;

	struct {

		struct {

			uint32_t cmdType;

		} header;

		SVGAFifoCmdDestroyScreen body;

	} *cmd;

	/* no need to do anything */

	if (unlikely(!sou->defined))

		return 0;

	fifo_size = sizeof(*cmd);

	cmd = vmw_fifo_reserve(dev_priv, fifo_size);

	/* the hardware has hung, nothing we can do about it here */

	if (unlikely(cmd == NULL)) {

		DRM_ERROR("Fifo reserve failed.\n");

		return -ENOMEM;

	}

	memset(cmd, 0, fifo_size);

	cmd->header.cmdType = SVGA_CMD_DESTROY_SCREEN;

	cmd->body.screenId = sou->base.unit;

	vmw_fifo_commit(dev_priv, fifo_size);

	/* 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");

	else

		sou->defined = false;

	return ret;

}

/**

 * Free the backing store.

 */

static void vmw_sou_backing_free(struct vmw_private *dev_priv,

				 struct vmw_screen_object_unit *sou)

{

	vmw_dmabuf_unreference(&sou->buffer);

	sou->buffer_size = 0;

}

/**

 * Allocate the backing store for the buffer.

 */

static int vmw_sou_backing_alloc(struct vmw_private *dev_priv,

				 struct vmw_screen_object_unit *sou,

				 unsigned long size)

{

	int ret;

	if (sou->buffer_size == size)

		return 0;

	if (sou->buffer)

		vmw_sou_backing_free(dev_priv, sou);

	sou->buffer = kzalloc(sizeof(*sou->buffer), GFP_KERNEL);

	if (unlikely(sou->buffer == NULL))

		return -ENOMEM;

	/* After we have alloced the backing store might not be able to

	 * resume the overlays, this is preferred to failing to alloc.

	 */

	vmw_overlay_pause_all(dev_priv);

	ret = vmw_dmabuf_init(dev_priv, sou->buffer, size,

			      &vmw_vram_ne_placement,

			      false, &vmw_dmabuf_bo_free);

	vmw_overlay_resume_all(dev_priv);

	if (unlikely(ret != 0))

		sou->buffer = NULL; /* vmw_dmabuf_init frees on error */

	else

		sou->buffer_size = size;

	return ret;

}

static int vmw_sou_crtc_set_config(struct drm_mode_set *set)

{

	struct vmw_private *dev_priv;

	struct vmw_screen_object_unit *sou;

	struct drm_connector *connector;

	struct drm_display_mode *mode;

	struct drm_encoder *encoder;

	struct vmw_framebuffer *vfb;

	struct drm_framebuffer *fb;

	struct drm_crtc *crtc;

	int ret = 0;

	if (!set)

		return -EINVAL;

	if (!set->crtc)

		return -EINVAL;

	/* get the sou */

	crtc = set->crtc;

	sou = vmw_crtc_to_sou(crtc);

	vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;

	dev_priv = vmw_priv(crtc->dev);

	if (set->num_connectors > 1) {

		DRM_ERROR("Too many connectors\n");

		return -EINVAL;

	}

	if (set->num_connectors == 1 &&

	    set->connectors[0] != &sou->base.connector) {

		DRM_ERROR("Connector doesn't match %p %p\n",

			set->connectors[0], &sou->base.connector);

		return -EINVAL;

	}

	/* sou only supports one fb active at the time */

	if (sou->base.is_implicit &&

	    dev_priv->sou_priv->implicit_fb && vfb &&

	    !(dev_priv->sou_priv->num_implicit == 1 &&

	      sou->active_implicit) &&

	    dev_priv->sou_priv->implicit_fb != vfb) {

		DRM_ERROR("Multiple framebuffers not supported\n");

		return -EINVAL;

	}

	/* since they always map one to one these are safe */

	connector = &sou->base.connector;

	encoder = &sou->base.encoder;

	/* should we turn the crtc off */

	if (set->num_connectors == 0 || !set->mode || !set->fb) {

		ret = vmw_sou_fifo_destroy(dev_priv, sou);

		/* the hardware has hung don't do anything more */

		if (unlikely(ret != 0))

			return ret;

		connector->encoder = NULL;

		encoder->crtc = NULL;

		crtc->primary->fb = NULL;

		crtc->x = 0;

		crtc->y = 0;

		crtc->enabled = false;

		vmw_sou_del_active(dev_priv, sou);

		vmw_sou_backing_free(dev_priv, sou);

		return 0;

	}

	/* we now know we want to set a mode */

	mode = set->mode;

	fb = set->fb;

	if (set->x + mode->hdisplay > fb->width ||

	    set->y + mode->vdisplay > fb->height) {

		DRM_ERROR("set outside of framebuffer\n");

		return -EINVAL;

	}

	vmw_svga_enable(dev_priv);

	if (mode->hdisplay != crtc->mode.hdisplay ||

	    mode->vdisplay != crtc->mode.vdisplay) {

		/* no need to check if depth is different, because backing

		 * store depth is forced to 4 by the device.

		 */

		ret = vmw_sou_fifo_destroy(dev_priv, sou);

		/* the hardware has hung don't do anything more */

		if (unlikely(ret != 0))

			return ret;

		vmw_sou_backing_free(dev_priv, sou);

	}

	if (!sou->buffer) {

		/* forced to depth 4 by the device */

		size_t size = mode->hdisplay * mode->vdisplay * 4;

		ret = vmw_sou_backing_alloc(dev_priv, sou, size);

		if (unlikely(ret != 0))

			return ret;

	}

	ret = vmw_sou_fifo_create(dev_priv, sou, set->x, set->y, mode);

	if (unlikely(ret != 0)) {

		/*

		 * We are in a bit of a situation here, the hardware has

		 * hung and we may or may not have a buffer hanging of

		 * the screen object, best thing to do is not do anything

		 * if we where defined, if not just turn the crtc of.

		 * Not what userspace wants but it needs to htfu.

		 */

		if (sou->defined)

			return ret;

		connector->encoder = NULL;

		encoder->crtc = NULL;

		crtc->primary->fb = NULL;

		crtc->x = 0;

		crtc->y = 0;

		crtc->enabled = false;

		return ret;

	}

	vmw_sou_add_active(dev_priv, sou, vfb);

	connector->encoder = encoder;

	encoder->crtc = crtc;

	crtc->mode = *mode;

	crtc->primary->fb = fb;

	crtc->x = set->x;

	crtc->y = set->y;

	crtc->enabled = true;

	return 0;

}

/**

 * Returns if this unit can be page flipped.

 * Must be called with the mode_config mutex held.

 */

static bool vmw_sou_screen_object_flippable(struct vmw_private *dev_priv,

					    struct drm_crtc *crtc)

{

	struct vmw_screen_object_unit *sou = vmw_crtc_to_sou(crtc);

	if (!sou->base.is_implicit)

		return true;

	if (dev_priv->sou_priv->num_implicit != 1)

		return false;

	return true;

}

/**

 * Update the implicit fb to the current fb of this crtc.

 * Must be called with the mode_config mutex held.

 */

static void vmw_sou_update_implicit_fb(struct vmw_private *dev_priv,

				       struct drm_crtc *crtc)

{

	struct vmw_screen_object_unit *sou = vmw_crtc_to_sou(crtc);

	BUG_ON(!sou->base.is_implicit);

	dev_priv->sou_priv->implicit_fb =

		vmw_framebuffer_to_vfb(sou->base.crtc.primary->fb);

}

static struct drm_crtc_funcs vmw_screen_object_crtc_funcs = {

	.save = vmw_du_crtc_save,

	.restore = vmw_du_crtc_restore,

//   .cursor_set = vmw_du_crtc_cursor_set,

//   .cursor_move = vmw_du_crtc_cursor_move,

	.gamma_set = vmw_du_crtc_gamma_set,

	.destroy = vmw_sou_crtc_destroy,

	.set_config = vmw_sou_crtc_set_config,

//   .page_flip = vmw_du_page_flip,

};

/*

 * Screen Object Display Unit encoder functions

 */

static void vmw_sou_encoder_destroy(struct drm_encoder *encoder)

{

	vmw_sou_destroy(vmw_encoder_to_sou(encoder));

}

static struct drm_encoder_funcs vmw_screen_object_encoder_funcs = {

	.destroy = vmw_sou_encoder_destroy,

};

/*

 * Screen Object Display Unit connector functions

 */

static void vmw_sou_connector_destroy(struct drm_connector *connector)

{

	vmw_sou_destroy(vmw_connector_to_sou(connector));

}

static struct drm_connector_funcs vmw_sou_connector_funcs = {

	.dpms = vmw_du_connector_dpms,

	.save = vmw_du_connector_save,

	.restore = vmw_du_connector_restore,

	.detect = vmw_du_connector_detect,

	.fill_modes = vmw_du_connector_fill_modes,

	.set_property = vmw_du_connector_set_property,

	.destroy = vmw_sou_connector_destroy,

};

static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)

{

	struct vmw_screen_object_unit *sou;

	struct drm_device *dev = dev_priv->dev;

	struct drm_connector *connector;

	struct drm_encoder *encoder;

	struct drm_crtc *crtc;

	sou = kzalloc(sizeof(*sou), GFP_KERNEL);

	if (!sou)

		return -ENOMEM;

	sou->base.unit = unit;

	crtc = &sou->base.crtc;

	encoder = &sou->base.encoder;

	connector = &sou->base.connector;

	sou->active_implicit = false;

	sou->base.pref_active = (unit == 0);

	sou->base.pref_width = dev_priv->initial_width;

	sou->base.pref_height = dev_priv->initial_height;

	sou->base.pref_mode = NULL;

	sou->base.is_implicit = true;

	drm_connector_init(dev, connector, &vmw_sou_connector_funcs,

			   DRM_MODE_CONNECTOR_VIRTUAL);

	connector->status = vmw_du_connector_detect(connector, true);

	drm_encoder_init(dev, encoder, &vmw_screen_object_encoder_funcs,

			 DRM_MODE_ENCODER_VIRTUAL);

	drm_mode_connector_attach_encoder(connector, encoder);

	encoder->possible_crtcs = (1 << unit);

	encoder->possible_clones = 0;

	(void) drm_connector_register(connector);

	drm_crtc_init(dev, crtc, &vmw_screen_object_crtc_funcs);

	drm_mode_crtc_set_gamma_size(crtc, 256);

	drm_object_attach_property(&connector->base,

				      dev->mode_config.dirty_info_property,

				      1);

	return 0;

}

int vmw_kms_sou_init_display(struct vmw_private *dev_priv)

{

	struct drm_device *dev = dev_priv->dev;

	int i, ret;

	if (dev_priv->sou_priv) {

		DRM_INFO("sou system already on\n");

		return -EINVAL;

	}

	if (!(dev_priv->capabilities & SVGA_CAP_SCREEN_OBJECT_2)) {

		DRM_INFO("Not using screen objects,"

			 " missing cap SCREEN_OBJECT_2\n");

		return -ENOSYS;

	}

	ret = -ENOMEM;

	dev_priv->sou_priv = kmalloc(sizeof(*dev_priv->sou_priv), GFP_KERNEL);

	if (unlikely(!dev_priv->sou_priv))

		goto err_no_mem;

	dev_priv->sou_priv->num_implicit = 0;

	dev_priv->sou_priv->implicit_fb = NULL;

	ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);

	if (unlikely(ret != 0))

		goto err_free;

	ret = drm_mode_create_dirty_info_property(dev);

	if (unlikely(ret != 0))

		goto err_vblank_cleanup;

	for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)

		vmw_sou_init(dev_priv, i);

	dev_priv->active_display_unit = vmw_du_screen_object;

	DRM_INFO("Screen Objects Display Unit initialized\n");

	return 0;

err_vblank_cleanup:

	drm_vblank_cleanup(dev);

err_free:

	kfree(dev_priv->sou_priv);

	dev_priv->sou_priv = NULL;

err_no_mem:

	return ret;

}

int vmw_kms_sou_close_display(struct vmw_private *dev_priv)

{

	struct drm_device *dev = dev_priv->dev;

	if (!dev_priv->sou_priv)

		return -ENOSYS;

	drm_vblank_cleanup(dev);

	kfree(dev_priv->sou_priv);

	return 0;

}

static int do_dmabuf_define_gmrfb(struct vmw_private *dev_priv,

				  struct vmw_framebuffer *framebuffer)

{

	struct vmw_dma_buffer *buf =

		container_of(framebuffer, struct vmw_framebuffer_dmabuf,

			     base)->buffer;

	int depth = framebuffer->base.depth;

	struct {

		uint32_t header;

		SVGAFifoCmdDefineGMRFB body;

	} *cmd;

	/* Emulate RGBA support, contrary to svga_reg.h this is not

	 * supported by hosts. This is only a problem if we are reading

	 * this value later and expecting what we uploaded back.

	 */

	if (depth == 32)

		depth = 24;

	cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));

	if (!cmd) {

		DRM_ERROR("Out of fifo space for dirty framebuffer command.\n");

		return -ENOMEM;

	}

	cmd->header = SVGA_CMD_DEFINE_GMRFB;

	cmd->body.format.bitsPerPixel = framebuffer->base.bits_per_pixel;

	cmd->body.format.colorDepth = depth;

	cmd->body.format.reserved = 0;

	cmd->body.bytesPerLine = framebuffer->base.pitches[0];

	/* Buffer is reserved in vram or GMR */

	vmw_bo_get_guest_ptr(&buf->base, &cmd->body.ptr);

	vmw_fifo_commit(dev_priv, sizeof(*cmd));

	return 0;

}

/**

 * vmw_sou_surface_fifo_commit - Callback to fill in and submit a

 * blit surface to screen command.

 *

 * @dirty: The closure structure.

 *

 * Fills in the missing fields in the command, and translates the cliprects

 * to match the destination bounding box encoded.

 */

static void vmw_sou_surface_fifo_commit(struct vmw_kms_dirty *dirty)

{

	struct vmw_kms_sou_surface_dirty *sdirty =

		container_of(dirty, typeof(*sdirty), base);

	struct vmw_kms_sou_dirty_cmd *cmd = dirty->cmd;

	s32 trans_x = dirty->unit->crtc.x - sdirty->dst_x;

	s32 trans_y = dirty->unit->crtc.y - sdirty->dst_y;

	size_t region_size = dirty->num_hits * sizeof(SVGASignedRect);

	SVGASignedRect *blit = (SVGASignedRect *) &cmd[1];

	int i;

	cmd->header.id = SVGA_3D_CMD_BLIT_SURFACE_TO_SCREEN;

	cmd->header.size = sizeof(cmd->body) + region_size;

	/*

	 * Use the destination bounding box to specify destination - and

	 * source bounding regions.

	 */

	cmd->body.destRect.left = sdirty->left;

	cmd->body.destRect.right = sdirty->right;

	cmd->body.destRect.top = sdirty->top;

	cmd->body.destRect.bottom = sdirty->bottom;

	cmd->body.srcRect.left = sdirty->left + trans_x;

	cmd->body.srcRect.right = sdirty->right + trans_x;

	cmd->body.srcRect.top = sdirty->top + trans_y;

	cmd->body.srcRect.bottom = sdirty->bottom + trans_y;

	cmd->body.srcImage.sid = sdirty->sid;

	cmd->body.destScreenId = dirty->unit->unit;

	/* Blits are relative to the destination rect. Translate. */

	for (i = 0; i < dirty->num_hits; ++i, ++blit) {

		blit->left -= sdirty->left;

		blit->right -= sdirty->left;

		blit->top -= sdirty->top;

		blit->bottom -= sdirty->top;

	}

	vmw_fifo_commit(dirty->dev_priv, region_size + sizeof(*cmd));

	sdirty->left = sdirty->top = S32_MAX;

	sdirty->right = sdirty->bottom = S32_MIN;

}

/**

 * vmw_sou_surface_clip - Callback to encode a blit surface to screen cliprect.

 *

 * @dirty: The closure structure

 *

 * Encodes a SVGASignedRect cliprect and updates the bounding box of the

 * BLIT_SURFACE_TO_SCREEN command.

 */

static void vmw_sou_surface_clip(struct vmw_kms_dirty *dirty)

{

	struct vmw_kms_sou_surface_dirty *sdirty =

		container_of(dirty, typeof(*sdirty), base);

	struct vmw_kms_sou_dirty_cmd *cmd = dirty->cmd;

	SVGASignedRect *blit = (SVGASignedRect *) &cmd[1];

	/* Destination rect. */

	blit += dirty->num_hits;

	blit->left = dirty->unit_x1;

	blit->top = dirty->unit_y1;

	blit->right = dirty->unit_x2;

	blit->bottom = dirty->unit_y2;

	/* 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);

	dirty->num_hits++;

}

/**

 * vmw_kms_sou_do_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.

 *

 * Returns 0 on success, negative error code on failure. -ERESTARTSYS if

 * interrupted.

 */

int vmw_kms_sou_do_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 vmw_framebuffer_surface *vfbs =

		container_of(framebuffer, typeof(*vfbs), base);

	struct vmw_kms_sou_surface_dirty sdirty;

	int ret;

	if (!srf)

		srf = &vfbs->surface->res;

	ret = vmw_kms_helper_resource_prepare(srf, true);

	if (ret)

		return ret;

	sdirty.base.fifo_commit = vmw_sou_surface_fifo_commit;

	sdirty.base.clip = vmw_sou_surface_clip;

	sdirty.base.dev_priv = dev_priv;

	sdirty.base.fifo_reserve_size = sizeof(struct vmw_kms_sou_dirty_cmd) +

	  sizeof(SVGASignedRect) * num_clips;

	sdirty.sid = srf->id;

	sdirty.left = sdirty.top = S32_MAX;

	sdirty.right = sdirty.bottom = S32_MIN;

	sdirty.dst_x = dest_x;

	sdirty.dst_y = dest_y;

	ret = vmw_kms_helper_dirty(dev_priv, framebuffer, clips, vclips,

				   dest_x, dest_y, num_clips, inc,

				   &sdirty.base);

	vmw_kms_helper_resource_finish(srf, out_fence);

	return ret;

}

/**

 * vmw_sou_dmabuf_fifo_commit - Callback to submit a set of readback clips.

 *

 * @dirty: The closure structure.

 *

 * Commits a previously built command buffer of readback clips.

 */

static void vmw_sou_dmabuf_fifo_commit(struct vmw_kms_dirty *dirty)

{

	vmw_fifo_commit(dirty->dev_priv,

			sizeof(struct vmw_kms_sou_dmabuf_blit) *

			dirty->num_hits);

}

/**

 * vmw_sou_dmabuf_clip - Callback to encode a readback cliprect.

 *

 * @dirty: The closure structure

 *

 * Encodes a BLIT_GMRFB_TO_SCREEN cliprect.

 */

static void vmw_sou_dmabuf_clip(struct vmw_kms_dirty *dirty)

{

	struct vmw_kms_sou_dmabuf_blit *blit = dirty->cmd;

	blit += dirty->num_hits;

	blit->header = SVGA_CMD_BLIT_GMRFB_TO_SCREEN;

	blit->body.destScreenId = dirty->unit->unit;

	blit->body.srcOrigin.x = dirty->fb_x;

	blit->body.srcOrigin.y = dirty->fb_y;

	blit->body.destRect.left = dirty->unit_x1;

	blit->body.destRect.top = dirty->unit_y1;

	blit->body.destRect.right = dirty->unit_x2;

	blit->body.destRect.bottom = dirty->unit_y2;

	dirty->num_hits++;

}

/**

 * vmw_kms_do_dmabuf_dirty - Dirty part of a dma-buffer backed framebuffer

 *

 * @dev_priv: Pointer to the device private structure.

 * @framebuffer: Pointer to the dma-buffer backed framebuffer.

 * @clips: Array of clip rects.

 * @num_clips: Number of clip rects in @clips.

 * @increment: Increment to use when looping over @clips.

 * @interruptible: Whether to perform waits interruptible if possible.

 * @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.

 *

 * Returns 0 on success, negative error code on failure. -ERESTARTSYS if

 * interrupted.

 */

int vmw_kms_sou_do_dmabuf_dirty(struct vmw_private *dev_priv,

				struct vmw_framebuffer *framebuffer,

				struct drm_clip_rect *clips,

				unsigned num_clips, int increment,

				bool interruptible,

				struct vmw_fence_obj **out_fence)

{

	struct vmw_dma_buffer *buf =

		container_of(framebuffer, struct vmw_framebuffer_dmabuf,

			     base)->buffer;

	struct vmw_kms_dirty dirty;

	int ret;

	ret = vmw_kms_helper_buffer_prepare(dev_priv, buf, interruptible,

					    false);

	if (ret)

		return ret;

	ret = do_dmabuf_define_gmrfb(dev_priv, framebuffer);

	if (unlikely(ret != 0))

		goto out_revert;

	dirty.fifo_commit = vmw_sou_dmabuf_fifo_commit;

	dirty.clip = vmw_sou_dmabuf_clip;

	dirty.fifo_reserve_size = sizeof(struct vmw_kms_sou_dmabuf_blit) *

		num_clips;

	ret = vmw_kms_helper_dirty(dev_priv, framebuffer, clips, NULL,

				   0, 0, num_clips, increment, &dirty);

	vmw_kms_helper_buffer_finish(dev_priv, NULL, buf, out_fence, NULL);

	return ret;

out_revert:

	vmw_kms_helper_buffer_revert(buf);

	return ret;

}

/**

 * vmw_sou_readback_fifo_commit - Callback to submit a set of readback clips.

 *

 * @dirty: The closure structure.

 *

 * Commits a previously built command buffer of readback clips.

 */

static void vmw_sou_readback_fifo_commit(struct vmw_kms_dirty *dirty)

{

	vmw_fifo_commit(dirty->dev_priv,

			sizeof(struct vmw_kms_sou_readback_blit) *

			dirty->num_hits);

}

/**

 * vmw_sou_readback_clip - Callback to encode a readback cliprect.

 *

 * @dirty: The closure structure

 *

 * Encodes a BLIT_SCREEN_TO_GMRFB cliprect.

 */

static void vmw_sou_readback_clip(struct vmw_kms_dirty *dirty)

{

	struct vmw_kms_sou_readback_blit *blit = dirty->cmd;

	blit += dirty->num_hits;

	blit->header = SVGA_CMD_BLIT_SCREEN_TO_GMRFB;

	blit->body.srcScreenId = dirty->unit->unit;

	blit->body.destOrigin.x = dirty->fb_x;

	blit->body.destOrigin.y = dirty->fb_y;

	blit->body.srcRect.left = dirty->unit_x1;

	blit->body.srcRect.top = dirty->unit_y1;

	blit->body.srcRect.right = dirty->unit_x2;

	blit->body.srcRect.bottom = dirty->unit_y2;

	dirty->num_hits++;

}

/**

 * vmw_kms_sou_readback - Perform a readback from the screen object system to

 * a dma-buffer backed framebuffer.

 *

 * @dev_priv: Pointer to the device private structure.

 * @file_priv: Pointer to a struct drm_file identifying the caller.

 * Must be set to NULL if @user_fence_rep is NULL.

 * @vfb: Pointer to the dma-buffer backed framebuffer.

 * @user_fence_rep: User-space provided structure for fence information.

 * Must be set to non-NULL if @file_priv is non-NULL.

 * @vclips: Array of clip rects.

 * @num_clips: Number of clip rects in @vclips.

 *

 * Returns 0 on success, negative error code on failure. -ERESTARTSYS if

 * interrupted.

 */

int vmw_kms_sou_readback(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_vmw_rect *vclips,

			 uint32_t num_clips)

{

	struct vmw_dma_buffer *buf =

		container_of(vfb, struct vmw_framebuffer_dmabuf, base)->buffer;

	struct vmw_kms_dirty dirty;

	int ret;

	ret = vmw_kms_helper_buffer_prepare(dev_priv, buf, true, false);

	if (ret)

		return ret;

	ret = do_dmabuf_define_gmrfb(dev_priv, vfb);

	if (unlikely(ret != 0))

		goto out_revert;

	dirty.fifo_commit = vmw_sou_readback_fifo_commit;

	dirty.clip = vmw_sou_readback_clip;

	dirty.fifo_reserve_size = sizeof(struct vmw_kms_sou_readback_blit) *

		num_clips;

	ret = vmw_kms_helper_dirty(dev_priv, vfb, NULL, vclips,

				   0, 0, num_clips, 1, &dirty);

	vmw_kms_helper_buffer_finish(dev_priv, file_priv, buf, NULL,

				     user_fence_rep);

	return ret;

out_revert:

	vmw_kms_helper_buffer_revert(buf);

	return ret;

}

#if 0

#include 

extern display_t os_display;

bool set_mode(struct drm_device *dev, struct drm_connector *connector,

              videomode_t *reqmode, bool strict)

{

    struct drm_display_mode  *mode = NULL, *tmpmode;

    struct vmw_private *dev_priv = vmw_priv(dev);

    struct vmw_screen_object_unit *sou;

    display_t *os_display;

    bool ret = false;

//    dbgprintf("width %d height %d vrefresh %d\n",

//               reqmode->width, reqmode->height, reqmode->freq);

    list_for_each_entry(tmpmode, &connector->modes, head)

    {

        if( (drm_mode_width(tmpmode)    == reqmode->width)  &&

            (drm_mode_height(tmpmode)   == reqmode->height) &&

            (drm_mode_vrefresh(tmpmode) == reqmode->freq) )

        {

            mode = tmpmode;

            goto do_set;

        }

    };

    if( (mode == NULL) && (strict == false) )

    {

        list_for_each_entry(tmpmode, &connector->modes, head)

        {

            if( (drm_mode_width(tmpmode)  == reqmode->width)  &&

                (drm_mode_height(tmpmode) == reqmode->height) )

            {

                mode = tmpmode;

                goto do_set;

            }

        };

    };

do_set:

    if( mode != NULL )

    {

        struct drm_framebuffer   *fb;

        struct drm_encoder       *encoder;

        struct drm_crtc          *crtc;

//        char  con_edid[128];

        const char *con_name;

        const char *enc_name;

        encoder = connector->encoder;

        crtc = encoder->crtc;

//        fb = list_first_entry(&dev->mode_config.fb_kernel_list,

//                              struct drm_framebuffer, filp_head);

//        memcpy(con_edid, connector->edid_blob_ptr->data, 128);

//        dbgprintf("Manufacturer: %s Model %x Serial Number %u\n",

//        manufacturer_name(con_edid + 0x08),

//        (unsigned short)(con_edid[0x0A] + (con_edid[0x0B] << 8)),

//        (unsigned int)(con_edid[0x0C] + (con_edid[0x0D] << 8)

//            + (con_edid[0x0E] << 16) + (con_edid[0x0F] << 24)));

        con_name = drm_get_connector_name(connector);

        enc_name = drm_get_encoder_name(encoder);

        dbgprintf("set mode %d %d connector %s encoder %s\n",

                   mode->hdisplay, mode->vdisplay, con_name, enc_name);

        os_display = GetDisplay();

#if 0

        sou = vmw_crtc_to_sou(crtc);

        sou->defined = true;

        ret = vmw_sou_fifo_destroy(dev_priv, sou);

        if (unlikely(ret != 0))

            return ret;

        ret = vmw_sou_fifo_create(dev_priv, sou, 0, 0, mode);

#else   /*   sledgehammer  */

        vmw_write(dev_priv,SVGA_REG_WIDTH,  mode->hdisplay);

        vmw_write(dev_priv,SVGA_REG_HEIGHT, mode->vdisplay);

        vmw_write(dev_priv,SVGA_REG_BITS_PER_PIXEL, 32);

        os_display->select_cursor(os_display->cursor);

        ret = 0;

#endif

        if (ret == 0)

        {

            os_display->width    = mode->hdisplay;

            os_display->height   = mode->vdisplay;

            os_display->pitch    = mode->hdisplay*4;

            os_display->vrefresh = drm_mode_vrefresh(mode);

            sysSetScreen(os_display->width, os_display->height, os_display->pitch);

            dbgprintf("new mode %d x %d pitch %d\n",

                       os_display->width, os_display->height, os_display->pitch);

        }

        else

            DRM_ERROR("failed to set mode %d_%d on crtc %p\n",

                       os_display->width, os_display->height, crtc);

    }

    return ret;

};

#endif