[deliverable/linux.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"
#include <drm/drm_plane_helper.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->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_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->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;
}

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_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 = 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_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;

	(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_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->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);

	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;
}

/**
 * Returns if this unit can be page flipped.
 * Must be called with the mode_config mutex held.
 */
bool vmw_kms_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.
 */
void vmw_kms_screen_object_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);
}
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"
3cb9ae4f	29	#include <drm/drm_plane_helper.h>
56d1c78d JB	30
	31
	32	#define vmw_crtc_to_sou(x) \
	33	container_of(x, struct vmw_screen_object_unit, base.crtc)
	34	#define vmw_encoder_to_sou(x) \
	35	container_of(x, struct vmw_screen_object_unit, base.encoder)
	36	#define vmw_connector_to_sou(x) \
	37	container_of(x, struct vmw_screen_object_unit, base.connector)
	38
	39	struct vmw_screen_object_display {
6987427a	40	unsigned num_implicit;
56d1c78d	41
6987427a	42	struct vmw_framebuffer *implicit_fb;
56d1c78d JB	43	};
	44
	45	/**
	46	* Display unit using screen objects.
	47	*/
	48	struct vmw_screen_object_unit {
	49	struct vmw_display_unit base;
	50
	51	unsigned long buffer_size; /*< Size of allocated buffer /
	52	struct vmw_dma_buffer buffer; /< Backing store buffer /
	53
	54	bool defined;
6987427a	55	bool active_implicit;
56d1c78d JB	56	};
	57
	58	static void vmw_sou_destroy(struct vmw_screen_object_unit *sou)
	59	{
56d1c78d JB	60	vmw_display_unit_cleanup(&sou->base);
	61	kfree(sou);
	62	}
	63
	64
	65	/*
	66	* Screen Object Display Unit CRTC functions
	67	*/
	68
	69	static void vmw_sou_crtc_destroy(struct drm_crtc *crtc)
	70	{
	71	vmw_sou_destroy(vmw_crtc_to_sou(crtc));
	72	}
	73
0e708bc5	74	static void vmw_sou_del_active(struct vmw_private *vmw_priv,
56d1c78d JB	75	struct vmw_screen_object_unit *sou)
	76	{
	77	struct vmw_screen_object_display *ld = vmw_priv->sou_priv;
56d1c78d	78
6987427a TH	79	if (sou->active_implicit) {
	80	if (--(ld->num_implicit) == 0)
	81	ld->implicit_fb = NULL;
	82	sou->active_implicit = false;
0e708bc5	83	}
56d1c78d JB	84	}
56d1c78d JB	85
0e708bc5	86	static void vmw_sou_add_active(struct vmw_private *vmw_priv,
56d1c78d JB	87	struct vmw_screen_object_unit *sou,
	88	struct vmw_framebuffer *vfb)
	89	{
	90	struct vmw_screen_object_display *ld = vmw_priv->sou_priv;
56d1c78d	91
6987427a	92	BUG_ON(!ld->num_implicit && ld->implicit_fb);
56d1c78d	93
6987427a TH	94	if (!sou->active_implicit && sou->base.is_implicit) {
	95	ld->implicit_fb = vfb;
	96	sou->active_implicit = true;
	97	ld->num_implicit++;
56d1c78d	98	}
56d1c78d JB	99	}
	100
	101	/**
	102	* Send the fifo command to create a screen.
	103	*/
	104	static int vmw_sou_fifo_create(struct vmw_private *dev_priv,
	105	struct vmw_screen_object_unit *sou,
	106	uint32_t x, uint32_t y,
	107	struct drm_display_mode *mode)
	108	{
	109	size_t fifo_size;
	110
	111	struct {
	112	struct {
	113	uint32_t cmdType;
	114	} header;
	115	SVGAScreenObject obj;
	116	} *cmd;
	117
	118	BUG_ON(!sou->buffer);
	119
	120	fifo_size = sizeof(*cmd);
	121	cmd = vmw_fifo_reserve(dev_priv, fifo_size);
	122	/* The hardware has hung, nothing we can do about it here. */
	123	if (unlikely(cmd == NULL)) {
	124	DRM_ERROR("Fifo reserve failed.\n");
	125	return -ENOMEM;
	126	}
	127
	128	memset(cmd, 0, fifo_size);
	129	cmd->header.cmdType = SVGA_CMD_DEFINE_SCREEN;
	130	cmd->obj.structSize = sizeof(SVGAScreenObject);
	131	cmd->obj.id = sou->base.unit;
	132	cmd->obj.flags = SVGA_SCREEN_HAS_ROOT \|
	133	(sou->base.unit == 0 ? SVGA_SCREEN_IS_PRIMARY : 0);
	134	cmd->obj.size.width = mode->hdisplay;
	135	cmd->obj.size.height = mode->vdisplay;
6987427a TH	136	if (sou->base.is_implicit) {
	137	cmd->obj.root.x = x;
	138	cmd->obj.root.y = y;
	139	} else {
	140	cmd->obj.root.x = sou->base.gui_x;
	141	cmd->obj.root.y = sou->base.gui_y;
	142	}
56d1c78d JB	143
56d1c78d JB	144	/* Ok to assume that buffer is pinned in vram */
b37a6b9a	145	vmw_bo_get_guest_ptr(&sou->buffer->base, &cmd->obj.backingStore.ptr);
56d1c78d JB	146	cmd->obj.backingStore.pitch = mode->hdisplay * 4;
	147
	148	vmw_fifo_commit(dev_priv, fifo_size);
	149
	150	sou->defined = true;
	151
	152	return 0;
	153	}
	154
	155	/**
	156	* Send the fifo command to destroy a screen.
	157	*/
	158	static int vmw_sou_fifo_destroy(struct vmw_private *dev_priv,
	159	struct vmw_screen_object_unit *sou)
	160	{
	161	size_t fifo_size;
	162	int ret;
	163
	164	struct {
	165	struct {
	166	uint32_t cmdType;
	167	} header;
	168	SVGAFifoCmdDestroyScreen body;
	169	} *cmd;
	170
	171	/* no need to do anything */
	172	if (unlikely(!sou->defined))
	173	return 0;
	174
	175	fifo_size = sizeof(*cmd);
	176	cmd = vmw_fifo_reserve(dev_priv, fifo_size);
	177	/* the hardware has hung, nothing we can do about it here */
	178	if (unlikely(cmd == NULL)) {
	179	DRM_ERROR("Fifo reserve failed.\n");
	180	return -ENOMEM;
	181	}
	182
	183	memset(cmd, 0, fifo_size);
	184	cmd->header.cmdType = SVGA_CMD_DESTROY_SCREEN;
	185	cmd->body.screenId = sou->base.unit;
	186
	187	vmw_fifo_commit(dev_priv, fifo_size);
	188
	189	/* Force sync */
	190	ret = vmw_fallback_wait(dev_priv, false, true, 0, false, 3*HZ);
	191	if (unlikely(ret != 0))
	192	DRM_ERROR("Failed to sync with HW");
	193	else
	194	sou->defined = false;
	195
	196	return ret;
	197	}
	198
	199	/**
	200	* Free the backing store.
	201	*/
	202	static void vmw_sou_backing_free(struct vmw_private *dev_priv,
	203	struct vmw_screen_object_unit *sou)
	204	{
	205	struct ttm_buffer_object *bo;
	206
	207	if (unlikely(sou->buffer == NULL))
	208	return;
	209
210	bo = &sou->buffer->base;
211	ttm_bo_unref(&bo);
212	sou->buffer = NULL;
213	sou->buffer_size = 0;
214	}
215
216	/**
217	* Allocate the backing store for the buffer.
218	*/
219	static int vmw_sou_backing_alloc(struct vmw_private *dev_priv,
220	struct vmw_screen_object_unit *sou,
221	unsigned long size)
222	{
223	int ret;
224
225	if (sou->buffer_size == size)
226	return 0;
227
228	if (sou->buffer)
229	vmw_sou_backing_free(dev_priv, sou);
230
231	sou->buffer = kzalloc(sizeof(*sou->buffer), GFP_KERNEL);
232	if (unlikely(sou->buffer == NULL))
233	return -ENOMEM;
234
235	/* After we have alloced the backing store might not be able to
236	* resume the overlays, this is preferred to failing to alloc.
237	*/
238	vmw_overlay_pause_all(dev_priv);
239	ret = vmw_dmabuf_init(dev_priv, sou->buffer, size,
240	&vmw_vram_ne_placement,
241	false, &vmw_dmabuf_bo_free);
242	vmw_overlay_resume_all(dev_priv);
243
244	if (unlikely(ret != 0))
245	sou->buffer = NULL; /* vmw_dmabuf_init frees on error */
246	else
247	sou->buffer_size = size;
248
249	return ret;
250	}
251
252	static int vmw_sou_crtc_set_config(struct drm_mode_set *set)
253	{
254	struct vmw_private *dev_priv;
255	struct vmw_screen_object_unit *sou;
256	struct drm_connector *connector;
257	struct drm_display_mode *mode;
258	struct drm_encoder *encoder;
259	struct vmw_framebuffer *vfb;
260	struct drm_framebuffer *fb;
261	struct drm_crtc *crtc;
262	int ret = 0;
263
264	if (!set)
265	return -EINVAL;
266
267	if (!set->crtc)
268	return -EINVAL;
269
270	/* get the sou */
271	crtc = set->crtc;
272	sou = vmw_crtc_to_sou(crtc);
273	vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
274	dev_priv = vmw_priv(crtc->dev);
275
276	if (set->num_connectors > 1) {
277	DRM_ERROR("to many connectors\n");
278	return -EINVAL;
279	}
280
281	if (set->num_connectors == 1 &&
282	set->connectors[0] != &sou->base.connector) {
283	DRM_ERROR("connector doesn't match %p %p\n",
284	set->connectors[0], &sou->base.connector);
285	return -EINVAL;
286	}
287
288	/* sou only supports one fb active at the time */
6987427a TH	289	if (sou->base.is_implicit &&
	290	dev_priv->sou_priv->implicit_fb && vfb &&
	291	!(dev_priv->sou_priv->num_implicit == 1 &&
	292	sou->active_implicit) &&
	293	dev_priv->sou_priv->implicit_fb != vfb) {
56d1c78d JB	294	DRM_ERROR("Multiple framebuffers not supported\n");
	295	return -EINVAL;
	296	}
	297
	298	/* since they always map one to one these are safe */
	299	connector = &sou->base.connector;
	300	encoder = &sou->base.encoder;
	301
	302	/* should we turn the crtc off */
	303	if (set->num_connectors == 0 \|\| !set->mode \|\| !set->fb) {
	304	ret = vmw_sou_fifo_destroy(dev_priv, sou);
	305	/* the hardware has hung don't do anything more */
	306	if (unlikely(ret != 0))
	307	return ret;
	308
	309	connector->encoder = NULL;
	310	encoder->crtc = NULL;
f4510a27	311	crtc->primary->fb = NULL;
56d1c78d JB	312	crtc->x = 0;
56d1c78d JB	313	crtc->y = 0;
c6c1f325	314	crtc->enabled = false;
56d1c78d JB	315
	316	vmw_sou_del_active(dev_priv, sou);
	317
	318	vmw_sou_backing_free(dev_priv, sou);
	319
	320	return 0;
	321	}
	322
	323
	324	/* we now know we want to set a mode */
	325	mode = set->mode;
	326	fb = set->fb;
	327
	328	if (set->x + mode->hdisplay > fb->width \|\|
	329	set->y + mode->vdisplay > fb->height) {
	330	DRM_ERROR("set outside of framebuffer\n");
	331	return -EINVAL;
	332	}
	333
	334	vmw_fb_off(dev_priv);
	335
	336	if (mode->hdisplay != crtc->mode.hdisplay \|\|
	337	mode->vdisplay != crtc->mode.vdisplay) {
	338	/* no need to check if depth is different, because backing
	339	* store depth is forced to 4 by the device.
	340	*/
	341
	342	ret = vmw_sou_fifo_destroy(dev_priv, sou);
	343	/* the hardware has hung don't do anything more */
	344	if (unlikely(ret != 0))
	345	return ret;
	346
	347	vmw_sou_backing_free(dev_priv, sou);
	348	}
	349
	350	if (!sou->buffer) {
	351	/* forced to depth 4 by the device */
	352	size_t size = mode->hdisplay * mode->vdisplay * 4;
	353	ret = vmw_sou_backing_alloc(dev_priv, sou, size);
	354	if (unlikely(ret != 0))
	355	return ret;
	356	}
	357
	358	ret = vmw_sou_fifo_create(dev_priv, sou, set->x, set->y, mode);
	359	if (unlikely(ret != 0)) {
	360	/*
	361	* We are in a bit of a situation here, the hardware has
	362	* hung and we may or may not have a buffer hanging of
	363	* the screen object, best thing to do is not do anything
	364	* if we where defined, if not just turn the crtc of.
	365	* Not what userspace wants but it needs to htfu.
	366	*/
	367	if (sou->defined)
	368	return ret;
	369
	370	connector->encoder = NULL;
	371	encoder->crtc = NULL;
f4510a27	372	crtc->primary->fb = NULL;
56d1c78d JB	373	crtc->x = 0;
56d1c78d JB	374	crtc->y = 0;
c6c1f325	375	crtc->enabled = false;
56d1c78d JB	376
	377	return ret;
	378	}
	379
	380	vmw_sou_add_active(dev_priv, sou, vfb);
	381
	382	connector->encoder = encoder;
	383	encoder->crtc = crtc;
	384	crtc->mode = *mode;
f4510a27	385	crtc->primary->fb = fb;
56d1c78d JB	386	crtc->x = set->x;
56d1c78d JB	387	crtc->y = set->y;
c6c1f325	388	crtc->enabled = true;
56d1c78d JB	389
	390	return 0;
	391	}
	392
	393	static struct drm_crtc_funcs vmw_screen_object_crtc_funcs = {
	394	.save = vmw_du_crtc_save,
	395	.restore = vmw_du_crtc_restore,
	396	.cursor_set = vmw_du_crtc_cursor_set,
	397	.cursor_move = vmw_du_crtc_cursor_move,
	398	.gamma_set = vmw_du_crtc_gamma_set,
	399	.destroy = vmw_sou_crtc_destroy,
	400	.set_config = vmw_sou_crtc_set_config,
b5ec427e	401	.page_flip = vmw_du_page_flip,
56d1c78d JB	402	};
	403
	404	/*
	405	* Screen Object Display Unit encoder functions
	406	*/
	407
	408	static void vmw_sou_encoder_destroy(struct drm_encoder *encoder)
	409	{
	410	vmw_sou_destroy(vmw_encoder_to_sou(encoder));
	411	}
	412
	413	static struct drm_encoder_funcs vmw_screen_object_encoder_funcs = {
	414	.destroy = vmw_sou_encoder_destroy,
	415	};
	416
	417	/*
	418	* Screen Object Display Unit connector functions
	419	*/
	420
	421	static void vmw_sou_connector_destroy(struct drm_connector *connector)
	422	{
	423	vmw_sou_destroy(vmw_connector_to_sou(connector));
	424	}
	425
	426	static struct drm_connector_funcs vmw_legacy_connector_funcs = {
	427	.dpms = vmw_du_connector_dpms,
	428	.save = vmw_du_connector_save,
	429	.restore = vmw_du_connector_restore,
	430	.detect = vmw_du_connector_detect,
	431	.fill_modes = vmw_du_connector_fill_modes,
	432	.set_property = vmw_du_connector_set_property,
	433	.destroy = vmw_sou_connector_destroy,
	434	};
	435
	436	static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
	437	{
	438	struct vmw_screen_object_unit *sou;
	439	struct drm_device *dev = dev_priv->dev;
	440	struct drm_connector *connector;
	441	struct drm_encoder *encoder;
	442	struct drm_crtc *crtc;
	443
	444	sou = kzalloc(sizeof(*sou), GFP_KERNEL);
	445	if (!sou)
	446	return -ENOMEM;
	447
	448	sou->base.unit = unit;
	449	crtc = &sou->base.crtc;
	450	encoder = &sou->base.encoder;
	451	connector = &sou->base.connector;
	452
6987427a	453	sou->active_implicit = false;
56d1c78d JB	454
56d1c78d JB	455	sou->base.pref_active = (unit == 0);
eb4f923b JB	456	sou->base.pref_width = dev_priv->initial_width;
eb4f923b JB	457	sou->base.pref_height = dev_priv->initial_height;
56d1c78d	458	sou->base.pref_mode = NULL;
6987427a	459	sou->base.is_implicit = true;
56d1c78d JB	460
56d1c78d JB	461	drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
305151e3	462	DRM_MODE_CONNECTOR_VIRTUAL);
56d1c78d JB	463	connector->status = vmw_du_connector_detect(connector, true);
	464
	465	drm_encoder_init(dev, encoder, &vmw_screen_object_encoder_funcs,
305151e3	466	DRM_MODE_ENCODER_VIRTUAL);
56d1c78d JB	467	drm_mode_connector_attach_encoder(connector, encoder);
	468	encoder->possible_crtcs = (1 << unit);
	469	encoder->possible_clones = 0;
	470
34ea3d38	471	(void) drm_connector_register(connector);
6a0a7a9e	472
56d1c78d JB	473	drm_crtc_init(dev, crtc, &vmw_screen_object_crtc_funcs);
	474
	475	drm_mode_crtc_set_gamma_size(crtc, 256);
	476
b8b163ba	477	drm_object_attach_property(&connector->base,
56d1c78d JB	478	dev->mode_config.dirty_info_property,
	479	1);
	480
	481	return 0;
	482	}
	483
	484	int vmw_kms_init_screen_object_display(struct vmw_private *dev_priv)
	485	{
	486	struct drm_device *dev = dev_priv->dev;
74b5ea30	487	int i, ret;
56d1c78d JB	488
	489	if (dev_priv->sou_priv) {
	490	DRM_INFO("sou system already on\n");
	491	return -EINVAL;
	492	}
	493
29a16e95	494	if (!(dev_priv->capabilities & SVGA_CAP_SCREEN_OBJECT_2)) {
56d1c78d JB	495	DRM_INFO("Not using screen objects,"
	496	" missing cap SCREEN_OBJECT_2\n");
	497	return -ENOSYS;
	498	}
	499
	500	ret = -ENOMEM;
	501	dev_priv->sou_priv = kmalloc(sizeof(*dev_priv->sou_priv), GFP_KERNEL);
	502	if (unlikely(!dev_priv->sou_priv))
	503	goto err_no_mem;
	504
6987427a TH	505	dev_priv->sou_priv->num_implicit = 0;
6987427a TH	506	dev_priv->sou_priv->implicit_fb = NULL;
56d1c78d JB	507
	508	ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
	509	if (unlikely(ret != 0))
	510	goto err_free;
	511
74b5ea30	512	ret = drm_mode_create_dirty_info_property(dev);
56d1c78d JB	513	if (unlikely(ret != 0))
	514	goto err_vblank_cleanup;
	515
	516	for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
	517	vmw_sou_init(dev_priv, i);
	518
	519	DRM_INFO("Screen objects system initialized\n");
	520
	521	return 0;
	522
	523	err_vblank_cleanup:
	524	drm_vblank_cleanup(dev);
	525	err_free:
	526	kfree(dev_priv->sou_priv);
60a16a30	527	dev_priv->sou_priv = NULL;
56d1c78d JB	528	err_no_mem:
	529	return ret;
	530	}
	531
	532	int vmw_kms_close_screen_object_display(struct vmw_private *dev_priv)
	533	{
	534	struct drm_device *dev = dev_priv->dev;
	535
56d1c78d JB	536	if (!dev_priv->sou_priv)
	537	return -ENOSYS;
	538
60a16a30 JB	539	drm_vblank_cleanup(dev);
60a16a30 JB	540
56d1c78d JB	541	kfree(dev_priv->sou_priv);
	542
	543	return 0;
	544	}
b5ec427e JB	545
	546	/**
	547	* Returns if this unit can be page flipped.
	548	* Must be called with the mode_config mutex held.
	549	*/
	550	bool vmw_kms_screen_object_flippable(struct vmw_private *dev_priv,
	551	struct drm_crtc *crtc)
	552	{
	553	struct vmw_screen_object_unit *sou = vmw_crtc_to_sou(crtc);
	554
	555	if (!sou->base.is_implicit)
	556	return true;
	557
	558	if (dev_priv->sou_priv->num_implicit != 1)
	559	return false;
	560
	561	return true;
	562	}
	563
	564	/**
	565	* Update the implicit fb to the current fb of this crtc.
	566	* Must be called with the mode_config mutex held.
	567	*/
	568	void vmw_kms_screen_object_update_implicit_fb(struct vmw_private *dev_priv,
	569	struct drm_crtc *crtc)
	570	{
	571	struct vmw_screen_object_unit *sou = vmw_crtc_to_sou(crtc);
	572
	573	BUG_ON(!sou->base.is_implicit);
	574
	575	dev_priv->sou_priv->implicit_fb =
f4510a27	576	vmw_framebuffer_to_vfb(sou->base.crtc.primary->fb);
b5ec427e	577	}