[mirror_ubuntu-hirsute-kernel.git] / drivers / gpu / drm / vmwgfx / vmwgfx_scrn.c

/**************************************************************************
 *
 * Copyright © 2011 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"


#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_screen_object_display {
	unsigned num_implicit;

	struct vmw_framebuffer *implicit_fb;
};

/**
 * 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_display_unit_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)
{
	struct ttm_buffer_object *bo;

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

	bo = &sou->buffer->base;
	ttm_bo_unref(&bo);
	sou->buffer = NULL;
	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("to 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->fb = NULL;
		crtc->x = 0;
		crtc->y = 0;

		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_fb_off(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->fb = NULL;
		crtc->x = 0;
		crtc->y = 0;

		return ret;
	}

	vmw_sou_add_active(dev_priv, sou, vfb);

	connector->encoder = encoder;
	encoder->crtc = crtc;
	crtc->mode = *mode;
	crtc->fb = fb;
	crtc->x = set->x;
	crtc->y = set->y;

	return 0;
}

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,
};

/*
 * 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_legacy_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 = 800;
	sou->base.pref_height = 600;
	sou->base.pref_mode = NULL;
	sou->base.is_implicit = true;

	drm_connector_init(dev, connector, &vmw_legacy_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;

	drm_crtc_init(dev, crtc, &vmw_screen_object_crtc_funcs);

	drm_mode_crtc_set_gamma_size(crtc, 256);

	drm_connector_attach_property(connector,
				      dev->mode_config.dirty_info_property,
				      1);

	return 0;
}

int vmw_kms_init_screen_object_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->fifo.capabilities & SVGA_FIFO_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);

	DRM_INFO("Screen objects system 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_close_screen_object_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;
}
Commit	Line	Data
56d1c78d JB	1	/**************************************************************************
	2	*
	3	* Copyright © 2011 VMware, Inc., Palo Alto, CA., USA
	4	* All Rights Reserved.
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a
	7	* copy of this software and associated documentation files (the
	8	* "Software"), to deal in the Software without restriction, including
	9	* without limitation the rights to use, copy, modify, merge, publish,
	10	* distribute, sub license, and/or sell copies of the Software, and to
	11	* permit persons to whom the Software is furnished to do so, subject to
	12	* the following conditions:
	13	*
	14	* The above copyright notice and this permission notice (including the
	15	* next paragraph) shall be included in all copies or substantial portions
	16	* of the Software.
	17	*
	18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	20	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
	21	* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
	22	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	23	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	24	* USE OR OTHER DEALINGS IN THE SOFTWARE.
	25	*
	26	**************************************************************************/
	27
	28	#include "vmwgfx_kms.h"
	29
	30
	31	#define vmw_crtc_to_sou(x) \
	32	container_of(x, struct vmw_screen_object_unit, base.crtc)
	33	#define vmw_encoder_to_sou(x) \
	34	container_of(x, struct vmw_screen_object_unit, base.encoder)
	35	#define vmw_connector_to_sou(x) \
	36	container_of(x, struct vmw_screen_object_unit, base.connector)
	37
	38	struct vmw_screen_object_display {
6987427a	39	unsigned num_implicit;
56d1c78d	40
6987427a	41	struct vmw_framebuffer *implicit_fb;
56d1c78d JB	42	};
	43
	44	/**
	45	* Display unit using screen objects.
	46	*/
	47	struct vmw_screen_object_unit {
	48	struct vmw_display_unit base;
	49
	50	unsigned long buffer_size; /*< Size of allocated buffer /
	51	struct vmw_dma_buffer buffer; /< Backing store buffer /
	52
	53	bool defined;
6987427a	54	bool active_implicit;
56d1c78d JB	55	};
	56
	57	static void vmw_sou_destroy(struct vmw_screen_object_unit *sou)
	58	{
56d1c78d JB	59	vmw_display_unit_cleanup(&sou->base);
	60	kfree(sou);
	61	}
	62
	63
	64	/*
	65	* Screen Object Display Unit CRTC functions
	66	*/
	67
	68	static void vmw_sou_crtc_destroy(struct drm_crtc *crtc)
	69	{
	70	vmw_sou_destroy(vmw_crtc_to_sou(crtc));
	71	}
	72
0e708bc5	73	static void vmw_sou_del_active(struct vmw_private *vmw_priv,
56d1c78d JB	74	struct vmw_screen_object_unit *sou)
	75	{
	76	struct vmw_screen_object_display *ld = vmw_priv->sou_priv;
56d1c78d	77
6987427a TH	78	if (sou->active_implicit) {
	79	if (--(ld->num_implicit) == 0)
	80	ld->implicit_fb = NULL;
	81	sou->active_implicit = false;
0e708bc5	82	}
56d1c78d JB	83	}
56d1c78d JB	84
0e708bc5	85	static void vmw_sou_add_active(struct vmw_private *vmw_priv,
56d1c78d JB	86	struct vmw_screen_object_unit *sou,
	87	struct vmw_framebuffer *vfb)
	88	{
	89	struct vmw_screen_object_display *ld = vmw_priv->sou_priv;
56d1c78d	90
6987427a	91	BUG_ON(!ld->num_implicit && ld->implicit_fb);
56d1c78d	92
6987427a TH	93	if (!sou->active_implicit && sou->base.is_implicit) {
	94	ld->implicit_fb = vfb;
	95	sou->active_implicit = true;
	96	ld->num_implicit++;
56d1c78d	97	}
56d1c78d JB	98	}
	99
	100	/**
	101	* Send the fifo command to create a screen.
	102	*/
	103	static int vmw_sou_fifo_create(struct vmw_private *dev_priv,
	104	struct vmw_screen_object_unit *sou,
	105	uint32_t x, uint32_t y,
	106	struct drm_display_mode *mode)
	107	{
	108	size_t fifo_size;
	109
	110	struct {
	111	struct {
	112	uint32_t cmdType;
	113	} header;
	114	SVGAScreenObject obj;
	115	} *cmd;
	116
	117	BUG_ON(!sou->buffer);
	118
	119	fifo_size = sizeof(*cmd);
	120	cmd = vmw_fifo_reserve(dev_priv, fifo_size);
	121	/* The hardware has hung, nothing we can do about it here. */
	122	if (unlikely(cmd == NULL)) {
	123	DRM_ERROR("Fifo reserve failed.\n");
	124	return -ENOMEM;
	125	}
	126
	127	memset(cmd, 0, fifo_size);
	128	cmd->header.cmdType = SVGA_CMD_DEFINE_SCREEN;
	129	cmd->obj.structSize = sizeof(SVGAScreenObject);
	130	cmd->obj.id = sou->base.unit;
	131	cmd->obj.flags = SVGA_SCREEN_HAS_ROOT \|
	132	(sou->base.unit == 0 ? SVGA_SCREEN_IS_PRIMARY : 0);
	133	cmd->obj.size.width = mode->hdisplay;
	134	cmd->obj.size.height = mode->vdisplay;
6987427a TH	135	if (sou->base.is_implicit) {
	136	cmd->obj.root.x = x;
	137	cmd->obj.root.y = y;
	138	} else {
	139	cmd->obj.root.x = sou->base.gui_x;
	140	cmd->obj.root.y = sou->base.gui_y;
	141	}
56d1c78d JB	142
56d1c78d JB	143	/* Ok to assume that buffer is pinned in vram */
b37a6b9a	144	vmw_bo_get_guest_ptr(&sou->buffer->base, &cmd->obj.backingStore.ptr);
56d1c78d JB	145	cmd->obj.backingStore.pitch = mode->hdisplay * 4;
	146
	147	vmw_fifo_commit(dev_priv, fifo_size);
	148
	149	sou->defined = true;
	150
	151	return 0;
	152	}
	153
	154	/**
	155	* Send the fifo command to destroy a screen.
	156	*/
	157	static int vmw_sou_fifo_destroy(struct vmw_private *dev_priv,
	158	struct vmw_screen_object_unit *sou)
	159	{
	160	size_t fifo_size;
	161	int ret;
	162
	163	struct {
	164	struct {
	165	uint32_t cmdType;
	166	} header;
	167	SVGAFifoCmdDestroyScreen body;
	168	} *cmd;
	169
	170	/* no need to do anything */
	171	if (unlikely(!sou->defined))
	172	return 0;
	173
	174	fifo_size = sizeof(*cmd);
	175	cmd = vmw_fifo_reserve(dev_priv, fifo_size);
	176	/* the hardware has hung, nothing we can do about it here */
	177	if (unlikely(cmd == NULL)) {
	178	DRM_ERROR("Fifo reserve failed.\n");
	179	return -ENOMEM;
	180	}
	181
	182	memset(cmd, 0, fifo_size);
	183	cmd->header.cmdType = SVGA_CMD_DESTROY_SCREEN;
	184	cmd->body.screenId = sou->base.unit;
	185
	186	vmw_fifo_commit(dev_priv, fifo_size);
	187
	188	/* Force sync */
	189	ret = vmw_fallback_wait(dev_priv, false, true, 0, false, 3*HZ);
	190	if (unlikely(ret != 0))
	191	DRM_ERROR("Failed to sync with HW");
	192	else
	193	sou->defined = false;
	194
	195	return ret;
	196	}
	197
	198	/**
	199	* Free the backing store.
	200	*/
	201	static void vmw_sou_backing_free(struct vmw_private *dev_priv,
	202	struct vmw_screen_object_unit *sou)
	203	{
	204	struct ttm_buffer_object *bo;
	205
	206	if (unlikely(sou->buffer == NULL))
	207	return;
	208
209	bo = &sou->buffer->base;
210	ttm_bo_unref(&bo);
211	sou->buffer = NULL;
212	sou->buffer_size = 0;
213	}
214
215	/**
216	* Allocate the backing store for the buffer.
217	*/
218	static int vmw_sou_backing_alloc(struct vmw_private *dev_priv,
219	struct vmw_screen_object_unit *sou,
220	unsigned long size)
221	{
222	int ret;
223
224	if (sou->buffer_size == size)
225	return 0;
226
227	if (sou->buffer)
228	vmw_sou_backing_free(dev_priv, sou);
229
230	sou->buffer = kzalloc(sizeof(*sou->buffer), GFP_KERNEL);
231	if (unlikely(sou->buffer == NULL))
232	return -ENOMEM;
233
234	/* After we have alloced the backing store might not be able to
235	* resume the overlays, this is preferred to failing to alloc.
236	*/
237	vmw_overlay_pause_all(dev_priv);
238	ret = vmw_dmabuf_init(dev_priv, sou->buffer, size,
239	&vmw_vram_ne_placement,
240	false, &vmw_dmabuf_bo_free);
241	vmw_overlay_resume_all(dev_priv);
242
243	if (unlikely(ret != 0))
244	sou->buffer = NULL; /* vmw_dmabuf_init frees on error */
245	else
246	sou->buffer_size = size;
247
248	return ret;
249	}
250
251	static int vmw_sou_crtc_set_config(struct drm_mode_set *set)
252	{
253	struct vmw_private *dev_priv;
254	struct vmw_screen_object_unit *sou;
255	struct drm_connector *connector;
256	struct drm_display_mode *mode;
257	struct drm_encoder *encoder;
258	struct vmw_framebuffer *vfb;
259	struct drm_framebuffer *fb;
260	struct drm_crtc *crtc;
261	int ret = 0;
262
263	if (!set)
264	return -EINVAL;
265
266	if (!set->crtc)
267	return -EINVAL;
268
269	/* get the sou */
270	crtc = set->crtc;
271	sou = vmw_crtc_to_sou(crtc);
272	vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
273	dev_priv = vmw_priv(crtc->dev);
274
275	if (set->num_connectors > 1) {
276	DRM_ERROR("to many connectors\n");
277	return -EINVAL;
278	}
279
280	if (set->num_connectors == 1 &&
281	set->connectors[0] != &sou->base.connector) {
282	DRM_ERROR("connector doesn't match %p %p\n",
283	set->connectors[0], &sou->base.connector);
284	return -EINVAL;
285	}
286
287	/* sou only supports one fb active at the time */
6987427a TH	288	if (sou->base.is_implicit &&
	289	dev_priv->sou_priv->implicit_fb && vfb &&
	290	!(dev_priv->sou_priv->num_implicit == 1 &&
	291	sou->active_implicit) &&
	292	dev_priv->sou_priv->implicit_fb != vfb) {
56d1c78d JB	293	DRM_ERROR("Multiple framebuffers not supported\n");
	294	return -EINVAL;
	295	}
	296
	297	/* since they always map one to one these are safe */
	298	connector = &sou->base.connector;
	299	encoder = &sou->base.encoder;
	300
	301	/* should we turn the crtc off */
	302	if (set->num_connectors == 0 \|\| !set->mode \|\| !set->fb) {
	303	ret = vmw_sou_fifo_destroy(dev_priv, sou);
	304	/* the hardware has hung don't do anything more */
	305	if (unlikely(ret != 0))
	306	return ret;
	307
	308	connector->encoder = NULL;
	309	encoder->crtc = NULL;
	310	crtc->fb = NULL;
	311	crtc->x = 0;
	312	crtc->y = 0;
	313
	314	vmw_sou_del_active(dev_priv, sou);
	315
	316	vmw_sou_backing_free(dev_priv, sou);
	317
	318	return 0;
	319	}
	320
	321
	322	/* we now know we want to set a mode */
	323	mode = set->mode;
	324	fb = set->fb;
	325
	326	if (set->x + mode->hdisplay > fb->width \|\|
	327	set->y + mode->vdisplay > fb->height) {
	328	DRM_ERROR("set outside of framebuffer\n");
	329	return -EINVAL;
	330	}
	331
	332	vmw_fb_off(dev_priv);
	333
	334	if (mode->hdisplay != crtc->mode.hdisplay \|\|
	335	mode->vdisplay != crtc->mode.vdisplay) {
	336	/* no need to check if depth is different, because backing
	337	* store depth is forced to 4 by the device.
	338	*/
	339
	340	ret = vmw_sou_fifo_destroy(dev_priv, sou);
	341	/* the hardware has hung don't do anything more */
	342	if (unlikely(ret != 0))
	343	return ret;
	344
	345	vmw_sou_backing_free(dev_priv, sou);
	346	}
	347
	348	if (!sou->buffer) {
	349	/* forced to depth 4 by the device */
	350	size_t size = mode->hdisplay * mode->vdisplay * 4;
	351	ret = vmw_sou_backing_alloc(dev_priv, sou, size);
	352	if (unlikely(ret != 0))
	353	return ret;
	354	}
	355
	356	ret = vmw_sou_fifo_create(dev_priv, sou, set->x, set->y, mode);
357	if (unlikely(ret != 0)) {
358	/*
359	* We are in a bit of a situation here, the hardware has
360	* hung and we may or may not have a buffer hanging of
361	* the screen object, best thing to do is not do anything
362	* if we where defined, if not just turn the crtc of.
363	* Not what userspace wants but it needs to htfu.
364	*/
365	if (sou->defined)
366	return ret;
367
368	connector->encoder = NULL;
369	encoder->crtc = NULL;
370	crtc->fb = NULL;
371	crtc->x = 0;
372	crtc->y = 0;
373
374	return ret;
375	}
376
377	vmw_sou_add_active(dev_priv, sou, vfb);
378
379	connector->encoder = encoder;
380	encoder->crtc = crtc;
381	crtc->mode = *mode;
382	crtc->fb = fb;
383	crtc->x = set->x;
384	crtc->y = set->y;
385
386	return 0;
387	}
388
389	static struct drm_crtc_funcs vmw_screen_object_crtc_funcs = {
390	.save = vmw_du_crtc_save,
391	.restore = vmw_du_crtc_restore,
392	.cursor_set = vmw_du_crtc_cursor_set,
393	.cursor_move = vmw_du_crtc_cursor_move,
394	.gamma_set = vmw_du_crtc_gamma_set,
395	.destroy = vmw_sou_crtc_destroy,
396	.set_config = vmw_sou_crtc_set_config,
397	};
398
399	/*
400	* Screen Object Display Unit encoder functions
401	*/
402
403	static void vmw_sou_encoder_destroy(struct drm_encoder *encoder)
404	{
405	vmw_sou_destroy(vmw_encoder_to_sou(encoder));
406	}
407
408	static struct drm_encoder_funcs vmw_screen_object_encoder_funcs = {
409	.destroy = vmw_sou_encoder_destroy,
410	};
411
412	/*
413	* Screen Object Display Unit connector functions
414	*/
415
416	static void vmw_sou_connector_destroy(struct drm_connector *connector)
417	{
418	vmw_sou_destroy(vmw_connector_to_sou(connector));
419	}
420
421	static struct drm_connector_funcs vmw_legacy_connector_funcs = {
422	.dpms = vmw_du_connector_dpms,
423	.save = vmw_du_connector_save,
424	.restore = vmw_du_connector_restore,
425	.detect = vmw_du_connector_detect,
426	.fill_modes = vmw_du_connector_fill_modes,
427	.set_property = vmw_du_connector_set_property,
428	.destroy = vmw_sou_connector_destroy,
429	};
430
431	static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
432	{
433	struct vmw_screen_object_unit *sou;
434	struct drm_device *dev = dev_priv->dev;
435	struct drm_connector *connector;
436	struct drm_encoder *encoder;
437	struct drm_crtc *crtc;
438
439	sou = kzalloc(sizeof(*sou), GFP_KERNEL);
440	if (!sou)
441	return -ENOMEM;
442
443	sou->base.unit = unit;
444	crtc = &sou->base.crtc;
445	encoder = &sou->base.encoder;
446	connector = &sou->base.connector;
447
6987427a	448	sou->active_implicit = false;
56d1c78d JB	449
	450	sou->base.pref_active = (unit == 0);
	451	sou->base.pref_width = 800;
	452	sou->base.pref_height = 600;
	453	sou->base.pref_mode = NULL;
6987427a	454	sou->base.is_implicit = true;
56d1c78d JB	455
56d1c78d JB	456	drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
305151e3	457	DRM_MODE_CONNECTOR_VIRTUAL);
56d1c78d JB	458	connector->status = vmw_du_connector_detect(connector, true);
	459
	460	drm_encoder_init(dev, encoder, &vmw_screen_object_encoder_funcs,
305151e3	461	DRM_MODE_ENCODER_VIRTUAL);
56d1c78d JB	462	drm_mode_connector_attach_encoder(connector, encoder);
	463	encoder->possible_crtcs = (1 << unit);
	464	encoder->possible_clones = 0;
	465
	466	drm_crtc_init(dev, crtc, &vmw_screen_object_crtc_funcs);
	467
	468	drm_mode_crtc_set_gamma_size(crtc, 256);
	469
	470	drm_connector_attach_property(connector,
	471	dev->mode_config.dirty_info_property,
	472	1);
	473
	474	return 0;
	475	}
	476
	477	int vmw_kms_init_screen_object_display(struct vmw_private *dev_priv)
	478	{
	479	struct drm_device *dev = dev_priv->dev;
74b5ea30	480	int i, ret;
56d1c78d JB	481
	482	if (dev_priv->sou_priv) {
	483	DRM_INFO("sou system already on\n");
	484	return -EINVAL;
	485	}
	486
	487	if (!(dev_priv->fifo.capabilities & SVGA_FIFO_CAP_SCREEN_OBJECT_2)) {
	488	DRM_INFO("Not using screen objects,"
	489	" missing cap SCREEN_OBJECT_2\n");
	490	return -ENOSYS;
	491	}
	492
	493	ret = -ENOMEM;
	494	dev_priv->sou_priv = kmalloc(sizeof(*dev_priv->sou_priv), GFP_KERNEL);
	495	if (unlikely(!dev_priv->sou_priv))
	496	goto err_no_mem;
	497
6987427a TH	498	dev_priv->sou_priv->num_implicit = 0;
6987427a TH	499	dev_priv->sou_priv->implicit_fb = NULL;
56d1c78d JB	500
	501	ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
	502	if (unlikely(ret != 0))
	503	goto err_free;
	504
74b5ea30	505	ret = drm_mode_create_dirty_info_property(dev);
56d1c78d JB	506	if (unlikely(ret != 0))
	507	goto err_vblank_cleanup;
	508
	509	for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
	510	vmw_sou_init(dev_priv, i);
	511
	512	DRM_INFO("Screen objects system initialized\n");
	513
	514	return 0;
	515
	516	err_vblank_cleanup:
	517	drm_vblank_cleanup(dev);
	518	err_free:
	519	kfree(dev_priv->sou_priv);
60a16a30	520	dev_priv->sou_priv = NULL;
56d1c78d JB	521	err_no_mem:
	522	return ret;
	523	}
	524
	525	int vmw_kms_close_screen_object_display(struct vmw_private *dev_priv)
	526	{
	527	struct drm_device *dev = dev_priv->dev;
	528
56d1c78d JB	529	if (!dev_priv->sou_priv)
	530	return -ENOSYS;
	531
60a16a30 JB	532	drm_vblank_cleanup(dev);
60a16a30 JB	533
56d1c78d JB	534	kfree(dev_priv->sou_priv);
	535
	536	return 0;
	537	}