[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / gpu / drm / vmwgfx / vmwgfx_fb.c

/**************************************************************************
 *
 * Copyright © 2007 David Airlie
 * Copyright © 2009 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 <linux/export.h>

#include <drm/drmP.h>
#include "vmwgfx_drv.h"

#include <drm/ttm/ttm_placement.h>

#define VMW_DIRTY_DELAY (HZ / 30)

struct vmw_fb_par {
	struct vmw_private *vmw_priv;

	void *vmalloc;

	struct vmw_dma_buffer *vmw_bo;
	struct ttm_bo_kmap_obj map;

	u32 pseudo_palette[17];

	unsigned depth;
	unsigned bpp;

	unsigned max_width;
	unsigned max_height;

	void *bo_ptr;
	unsigned bo_size;
	bool bo_iowrite;

	struct {
		spinlock_t lock;
		bool active;
		unsigned x1;
		unsigned y1;
		unsigned x2;
		unsigned y2;
	} dirty;
};

static int vmw_fb_setcolreg(unsigned regno, unsigned red, unsigned green,
			    unsigned blue, unsigned transp,
			    struct fb_info *info)
{
	struct vmw_fb_par *par = info->par;
	u32 *pal = par->pseudo_palette;

	if (regno > 15) {
		DRM_ERROR("Bad regno %u.\n", regno);
		return 1;
	}

	switch (par->depth) {
	case 24:
	case 32:
		pal[regno] = ((red & 0xff00) << 8) |
			      (green & 0xff00) |
			     ((blue  & 0xff00) >> 8);
		break;
	default:
		DRM_ERROR("Bad depth %u, bpp %u.\n", par->depth, par->bpp);
		return 1;
	}

	return 0;
}

static int vmw_fb_check_var(struct fb_var_screeninfo *var,
			    struct fb_info *info)
{
	int depth = var->bits_per_pixel;
	struct vmw_fb_par *par = info->par;
	struct vmw_private *vmw_priv = par->vmw_priv;

	switch (var->bits_per_pixel) {
	case 32:
		depth = (var->transp.length > 0) ? 32 : 24;
		break;
	default:
		DRM_ERROR("Bad bpp %u.\n", var->bits_per_pixel);
		return -EINVAL;
	}

	switch (depth) {
	case 24:
		var->red.offset = 16;
		var->green.offset = 8;
		var->blue.offset = 0;
		var->red.length = 8;
		var->green.length = 8;
		var->blue.length = 8;
		var->transp.length = 0;
		var->transp.offset = 0;
		break;
	case 32:
		var->red.offset = 16;
		var->green.offset = 8;
		var->blue.offset = 0;
		var->red.length = 8;
		var->green.length = 8;
		var->blue.length = 8;
		var->transp.length = 8;
		var->transp.offset = 24;
		break;
	default:
		DRM_ERROR("Bad depth %u.\n", depth);
		return -EINVAL;
	}

	if (!(vmw_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY) &&
	    (var->xoffset != 0 || var->yoffset != 0)) {
		DRM_ERROR("Can not handle panning without display topology\n");
		return -EINVAL;
	}

	if ((var->xoffset + var->xres) > par->max_width ||
	    (var->yoffset + var->yres) > par->max_height) {
		DRM_ERROR("Requested geom can not fit in framebuffer\n");
		return -EINVAL;
	}

	if (!vmw_kms_validate_mode_vram(vmw_priv,
					info->fix.line_length,
					var->yoffset + var->yres)) {
		DRM_ERROR("Requested geom can not fit in framebuffer\n");
		return -EINVAL;
	}

	return 0;
}

static int vmw_fb_set_par(struct fb_info *info)
{
	struct vmw_fb_par *par = info->par;
	struct vmw_private *vmw_priv = par->vmw_priv;
	int ret;

	ret = vmw_kms_write_svga(vmw_priv, info->var.xres, info->var.yres,
				 info->fix.line_length,
				 par->bpp, par->depth);
	if (ret)
		return ret;

	if (vmw_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY) {
		/* TODO check if pitch and offset changes */
		vmw_write(vmw_priv, SVGA_REG_NUM_GUEST_DISPLAYS, 1);
		vmw_write(vmw_priv, SVGA_REG_DISPLAY_ID, 0);
		vmw_write(vmw_priv, SVGA_REG_DISPLAY_IS_PRIMARY, true);
		vmw_write(vmw_priv, SVGA_REG_DISPLAY_POSITION_X, info->var.xoffset);
		vmw_write(vmw_priv, SVGA_REG_DISPLAY_POSITION_Y, info->var.yoffset);
		vmw_write(vmw_priv, SVGA_REG_DISPLAY_WIDTH, info->var.xres);
		vmw_write(vmw_priv, SVGA_REG_DISPLAY_HEIGHT, info->var.yres);
		vmw_write(vmw_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
	}

	/* This is really helpful since if this fails the user
	 * can probably not see anything on the screen.
	 */
	WARN_ON(vmw_read(vmw_priv, SVGA_REG_FB_OFFSET) != 0);

	return 0;
}

static int vmw_fb_pan_display(struct fb_var_screeninfo *var,
			      struct fb_info *info)
{
	return 0;
}

static int vmw_fb_blank(int blank, struct fb_info *info)
{
	return 0;
}

/*
 * Dirty code
 */

static void vmw_fb_dirty_flush(struct vmw_fb_par *par)
{
	struct vmw_private *vmw_priv = par->vmw_priv;
	struct fb_info *info = vmw_priv->fb_info;
	int stride = (info->fix.line_length / 4);
	int *src = (int *)info->screen_base;
	__le32 __iomem *vram_mem = par->bo_ptr;
	unsigned long flags;
	unsigned x, y, w, h;
	int i, k;
	struct {
		uint32_t header;
		SVGAFifoCmdUpdate body;
	} *cmd;

	if (vmw_priv->suspended)
		return;

	spin_lock_irqsave(&par->dirty.lock, flags);
	if (!par->dirty.active) {
		spin_unlock_irqrestore(&par->dirty.lock, flags);
		return;
	}
	x = par->dirty.x1;
	y = par->dirty.y1;
	w = min(par->dirty.x2, info->var.xres) - x;
	h = min(par->dirty.y2, info->var.yres) - y;
	par->dirty.x1 = par->dirty.x2 = 0;
	par->dirty.y1 = par->dirty.y2 = 0;
	spin_unlock_irqrestore(&par->dirty.lock, flags);

	for (i = y * stride; i < info->fix.smem_len / 4; i += stride) {
		for (k = i+x; k < i+x+w && k < info->fix.smem_len / 4; k++)
			iowrite32(src[k], vram_mem + k);
	}

#if 0
	DRM_INFO("%s, (%u, %u) (%ux%u)\n", __func__, x, y, w, h);
#endif

	cmd = vmw_fifo_reserve(vmw_priv, sizeof(*cmd));
	if (unlikely(cmd == NULL)) {
		DRM_ERROR("Fifo reserve failed.\n");
		return;
	}

	cmd->header = cpu_to_le32(SVGA_CMD_UPDATE);
	cmd->body.x = cpu_to_le32(x);
	cmd->body.y = cpu_to_le32(y);
	cmd->body.width = cpu_to_le32(w);
	cmd->body.height = cpu_to_le32(h);
	vmw_fifo_commit(vmw_priv, sizeof(*cmd));
}

static void vmw_fb_dirty_mark(struct vmw_fb_par *par,
			      unsigned x1, unsigned y1,
			      unsigned width, unsigned height)
{
	struct fb_info *info = par->vmw_priv->fb_info;
	unsigned long flags;
	unsigned x2 = x1 + width;
	unsigned y2 = y1 + height;

	spin_lock_irqsave(&par->dirty.lock, flags);
	if (par->dirty.x1 == par->dirty.x2) {
		par->dirty.x1 = x1;
		par->dirty.y1 = y1;
		par->dirty.x2 = x2;
		par->dirty.y2 = y2;
		/* if we are active start the dirty work
		 * we share the work with the defio system */
		if (par->dirty.active)
			schedule_delayed_work(&info->deferred_work, VMW_DIRTY_DELAY);
	} else {
		if (x1 < par->dirty.x1)
			par->dirty.x1 = x1;
		if (y1 < par->dirty.y1)
			par->dirty.y1 = y1;
		if (x2 > par->dirty.x2)
			par->dirty.x2 = x2;
		if (y2 > par->dirty.y2)
			par->dirty.y2 = y2;
	}
	spin_unlock_irqrestore(&par->dirty.lock, flags);
}

static void vmw_deferred_io(struct fb_info *info,
			    struct list_head *pagelist)
{
	struct vmw_fb_par *par = info->par;
	unsigned long start, end, min, max;
	unsigned long flags;
	struct page *page;
	int y1, y2;

	min = ULONG_MAX;
	max = 0;
	list_for_each_entry(page, pagelist, lru) {
		start = page->index << PAGE_SHIFT;
		end = start + PAGE_SIZE - 1;
		min = min(min, start);
		max = max(max, end);
	}

	if (min < max) {
		y1 = min / info->fix.line_length;
		y2 = (max / info->fix.line_length) + 1;

		spin_lock_irqsave(&par->dirty.lock, flags);
		par->dirty.x1 = 0;
		par->dirty.y1 = y1;
		par->dirty.x2 = info->var.xres;
		par->dirty.y2 = y2;
		spin_unlock_irqrestore(&par->dirty.lock, flags);
	}

	vmw_fb_dirty_flush(par);
};

struct fb_deferred_io vmw_defio = {
	.delay		= VMW_DIRTY_DELAY,
	.deferred_io	= vmw_deferred_io,
};

/*
 * Draw code
 */

static void vmw_fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
	cfb_fillrect(info, rect);
	vmw_fb_dirty_mark(info->par, rect->dx, rect->dy,
			  rect->width, rect->height);
}

static void vmw_fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
{
	cfb_copyarea(info, region);
	vmw_fb_dirty_mark(info->par, region->dx, region->dy,
			  region->width, region->height);
}

static void vmw_fb_imageblit(struct fb_info *info, const struct fb_image *image)
{
	cfb_imageblit(info, image);
	vmw_fb_dirty_mark(info->par, image->dx, image->dy,
			  image->width, image->height);
}

/*
 * Bring up code
 */

static struct fb_ops vmw_fb_ops = {
	.owner = THIS_MODULE,
	.fb_check_var = vmw_fb_check_var,
	.fb_set_par = vmw_fb_set_par,
	.fb_setcolreg = vmw_fb_setcolreg,
	.fb_fillrect = vmw_fb_fillrect,
	.fb_copyarea = vmw_fb_copyarea,
	.fb_imageblit = vmw_fb_imageblit,
	.fb_pan_display = vmw_fb_pan_display,
	.fb_blank = vmw_fb_blank,
};

static int vmw_fb_create_bo(struct vmw_private *vmw_priv,
			    size_t size, struct vmw_dma_buffer **out)
{
	struct vmw_dma_buffer *vmw_bo;
	struct ttm_placement ne_placement = vmw_vram_ne_placement;
	int ret;

	ne_placement.lpfn = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;

	/* interuptable? */
	ret = ttm_write_lock(&vmw_priv->fbdev_master.lock, false);
	if (unlikely(ret != 0))
		return ret;

	vmw_bo = kmalloc(sizeof(*vmw_bo), GFP_KERNEL);
	if (!vmw_bo)
		goto err_unlock;

	ret = vmw_dmabuf_init(vmw_priv, vmw_bo, size,
			      &ne_placement,
			      false,
			      &vmw_dmabuf_bo_free);
	if (unlikely(ret != 0))
		goto err_unlock; /* init frees the buffer on failure */

	*out = vmw_bo;

	ttm_write_unlock(&vmw_priv->fbdev_master.lock);

	return 0;

err_unlock:
	ttm_write_unlock(&vmw_priv->fbdev_master.lock);
	return ret;
}

int vmw_fb_init(struct vmw_private *vmw_priv)
{
	struct device *device = &vmw_priv->dev->pdev->dev;
	struct vmw_fb_par *par;
	struct fb_info *info;
	unsigned initial_width, initial_height;
	unsigned fb_width, fb_height;
	unsigned fb_bpp, fb_depth, fb_offset, fb_pitch, fb_size;
	int ret;

	fb_bpp = 32;
	fb_depth = 24;

	/* XXX As shouldn't these be as well. */
	fb_width = min(vmw_priv->fb_max_width, (unsigned)2048);
	fb_height = min(vmw_priv->fb_max_height, (unsigned)2048);

	initial_width = min(vmw_priv->initial_width, fb_width);
	initial_height = min(vmw_priv->initial_height, fb_height);

	fb_pitch = fb_width * fb_bpp / 8;
	fb_size = fb_pitch * fb_height;
	fb_offset = vmw_read(vmw_priv, SVGA_REG_FB_OFFSET);

	info = framebuffer_alloc(sizeof(*par), device);
	if (!info)
		return -ENOMEM;

	/*
	 * Par
	 */
	vmw_priv->fb_info = info;
	par = info->par;
	par->vmw_priv = vmw_priv;
	par->depth = fb_depth;
	par->bpp = fb_bpp;
	par->vmalloc = NULL;
	par->max_width = fb_width;
	par->max_height = fb_height;

	/*
	 * Create buffers and alloc memory
	 */
	par->vmalloc = vmalloc(fb_size);
	if (unlikely(par->vmalloc == NULL)) {
		ret = -ENOMEM;
		goto err_free;
	}

	ret = vmw_fb_create_bo(vmw_priv, fb_size, &par->vmw_bo);
	if (unlikely(ret != 0))
		goto err_free;

	ret = ttm_bo_kmap(&par->vmw_bo->base,
			  0,
			  par->vmw_bo->base.num_pages,
			  &par->map);
	if (unlikely(ret != 0))
		goto err_unref;
	par->bo_ptr = ttm_kmap_obj_virtual(&par->map, &par->bo_iowrite);
	par->bo_size = fb_size;

	/*
	 * Fixed and var
	 */
	strcpy(info->fix.id, "svgadrmfb");
	info->fix.type = FB_TYPE_PACKED_PIXELS;
	info->fix.visual = FB_VISUAL_TRUECOLOR;
	info->fix.type_aux = 0;
	info->fix.xpanstep = 1; /* doing it in hw */
	info->fix.ypanstep = 1; /* doing it in hw */
	info->fix.ywrapstep = 0;
	info->fix.accel = FB_ACCEL_NONE;
	info->fix.line_length = fb_pitch;

	info->fix.smem_start = 0;
	info->fix.smem_len = fb_size;

	info->pseudo_palette = par->pseudo_palette;
	info->screen_base = par->vmalloc;
	info->screen_size = fb_size;

	info->flags = FBINFO_DEFAULT;
	info->fbops = &vmw_fb_ops;

	/* 24 depth per default */
	info->var.red.offset = 16;
	info->var.green.offset = 8;
	info->var.blue.offset = 0;
	info->var.red.length = 8;
	info->var.green.length = 8;
	info->var.blue.length = 8;
	info->var.transp.offset = 0;
	info->var.transp.length = 0;

	info->var.xres_virtual = fb_width;
	info->var.yres_virtual = fb_height;
	info->var.bits_per_pixel = par->bpp;
	info->var.xoffset = 0;
	info->var.yoffset = 0;
	info->var.activate = FB_ACTIVATE_NOW;
	info->var.height = -1;
	info->var.width = -1;

	info->var.xres = initial_width;
	info->var.yres = initial_height;

	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */

	info->apertures = alloc_apertures(1);
	if (!info->apertures) {
		ret = -ENOMEM;
		goto err_aper;
	}
	info->apertures->ranges[0].base = vmw_priv->vram_start;
	info->apertures->ranges[0].size = vmw_priv->vram_size;

	/*
	 * Dirty & Deferred IO
	 */
	par->dirty.x1 = par->dirty.x2 = 0;
	par->dirty.y1 = par->dirty.y2 = 0;
	par->dirty.active = true;
	spin_lock_init(&par->dirty.lock);
	info->fbdefio = &vmw_defio;
	fb_deferred_io_init(info);

	ret = register_framebuffer(info);
	if (unlikely(ret != 0))
		goto err_defio;

	return 0;

err_defio:
	fb_deferred_io_cleanup(info);
err_aper:
	ttm_bo_kunmap(&par->map);
err_unref:
	ttm_bo_unref((struct ttm_buffer_object **)&par->vmw_bo);
err_free:
	vfree(par->vmalloc);
	framebuffer_release(info);
	vmw_priv->fb_info = NULL;

	return ret;
}

int vmw_fb_close(struct vmw_private *vmw_priv)
{
	struct fb_info *info;
	struct vmw_fb_par *par;
	struct ttm_buffer_object *bo;

	if (!vmw_priv->fb_info)
		return 0;

	info = vmw_priv->fb_info;
	par = info->par;
	bo = &par->vmw_bo->base;
	par->vmw_bo = NULL;

	/* ??? order */
	fb_deferred_io_cleanup(info);
	unregister_framebuffer(info);

	ttm_bo_kunmap(&par->map);
	ttm_bo_unref(&bo);

	vfree(par->vmalloc);
	framebuffer_release(info);

	return 0;
}

int vmw_fb_off(struct vmw_private *vmw_priv)
{
	struct fb_info *info;
	struct vmw_fb_par *par;
	unsigned long flags;

	if (!vmw_priv->fb_info)
		return -EINVAL;

	info = vmw_priv->fb_info;
	par = info->par;

	spin_lock_irqsave(&par->dirty.lock, flags);
	par->dirty.active = false;
	spin_unlock_irqrestore(&par->dirty.lock, flags);

	flush_delayed_work_sync(&info->deferred_work);

	par->bo_ptr = NULL;
	ttm_bo_kunmap(&par->map);

	vmw_dmabuf_unpin(vmw_priv, par->vmw_bo, false);

	return 0;
}

int vmw_fb_on(struct vmw_private *vmw_priv)
{
	struct fb_info *info;
	struct vmw_fb_par *par;
	unsigned long flags;
	bool dummy;
	int ret;

	if (!vmw_priv->fb_info)
		return -EINVAL;

	info = vmw_priv->fb_info;
	par = info->par;

	/* we are already active */
	if (par->bo_ptr != NULL)
		return 0;

	/* Make sure that all overlays are stoped when we take over */
	vmw_overlay_stop_all(vmw_priv);

	ret = vmw_dmabuf_to_start_of_vram(vmw_priv, par->vmw_bo, true, false);
	if (unlikely(ret != 0)) {
		DRM_ERROR("could not move buffer to start of VRAM\n");
		goto err_no_buffer;
	}

	ret = ttm_bo_kmap(&par->vmw_bo->base,
			  0,
			  par->vmw_bo->base.num_pages,
			  &par->map);
	BUG_ON(ret != 0);
	par->bo_ptr = ttm_kmap_obj_virtual(&par->map, &dummy);

	spin_lock_irqsave(&par->dirty.lock, flags);
	par->dirty.active = true;
	spin_unlock_irqrestore(&par->dirty.lock, flags);

err_no_buffer:
	vmw_fb_set_par(info);

	vmw_fb_dirty_mark(par, 0, 0, info->var.xres, info->var.yres);

	/* If there already was stuff dirty we wont
	 * schedule a new work, so lets do it now */
	schedule_delayed_work(&info->deferred_work, 0);

	return 0;
}
Commit	Line	Data
fb1d9738 JB	1	/**************************************************************************
	2	*
	3	* Copyright © 2007 David Airlie
	4	* Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
	5	* All Rights Reserved.
	6	*
	7	* Permission is hereby granted, free of charge, to any person obtaining a
	8	* copy of this software and associated documentation files (the
	9	* "Software"), to deal in the Software without restriction, including
	10	* without limitation the rights to use, copy, modify, merge, publish,
	11	* distribute, sub license, and/or sell copies of the Software, and to
	12	* permit persons to whom the Software is furnished to do so, subject to
	13	* the following conditions:
	14	*
	15	* The above copyright notice and this permission notice (including the
	16	* next paragraph) shall be included in all copies or substantial portions
	17	* of the Software.
	18	*
	19	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	20	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	21	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
	22	* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
	23	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	24	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	25	* USE OR OTHER DEALINGS IN THE SOFTWARE.
	26	*
	27	**************************************************************************/
	28
2d1a8a48 PG	29	#include <linux/export.h>
2d1a8a48 PG	30
760285e7	31	#include <drm/drmP.h>
fb1d9738 JB	32	#include "vmwgfx_drv.h"
fb1d9738 JB	33
760285e7	34	#include <drm/ttm/ttm_placement.h>
fb1d9738 JB	35
	36	#define VMW_DIRTY_DELAY (HZ / 30)
	37
	38	struct vmw_fb_par {
	39	struct vmw_private *vmw_priv;
	40
	41	void *vmalloc;
	42
	43	struct vmw_dma_buffer *vmw_bo;
	44	struct ttm_bo_kmap_obj map;
	45
	46	u32 pseudo_palette[17];
	47
	48	unsigned depth;
	49	unsigned bpp;
	50
	51	unsigned max_width;
	52	unsigned max_height;
	53
	54	void *bo_ptr;
	55	unsigned bo_size;
	56	bool bo_iowrite;
	57
	58	struct {
	59	spinlock_t lock;
	60	bool active;
	61	unsigned x1;
	62	unsigned y1;
	63	unsigned x2;
	64	unsigned y2;
	65	} dirty;
	66	};
	67
	68	static int vmw_fb_setcolreg(unsigned regno, unsigned red, unsigned green,
	69	unsigned blue, unsigned transp,
	70	struct fb_info *info)
	71	{
	72	struct vmw_fb_par *par = info->par;
	73	u32 *pal = par->pseudo_palette;
	74
	75	if (regno > 15) {
	76	DRM_ERROR("Bad regno %u.\n", regno);
	77	return 1;
	78	}
	79
	80	switch (par->depth) {
	81	case 24:
	82	case 32:
	83	pal[regno] = ((red & 0xff00) << 8) \|
	84	(green & 0xff00) \|
	85	((blue & 0xff00) >> 8);
	86	break;
	87	default:
	88	DRM_ERROR("Bad depth %u, bpp %u.\n", par->depth, par->bpp);
	89	return 1;
	90	}
	91
	92	return 0;
	93	}
	94
	95	static int vmw_fb_check_var(struct fb_var_screeninfo *var,
	96	struct fb_info *info)
	97	{
	98	int depth = var->bits_per_pixel;
99	struct vmw_fb_par *par = info->par;
100	struct vmw_private *vmw_priv = par->vmw_priv;
101
102	switch (var->bits_per_pixel) {
103	case 32:
104	depth = (var->transp.length > 0) ? 32 : 24;
105	break;
106	default:
107	DRM_ERROR("Bad bpp %u.\n", var->bits_per_pixel);
108	return -EINVAL;
109	}
110
111	switch (depth) {
112	case 24:
113	var->red.offset = 16;
114	var->green.offset = 8;
115	var->blue.offset = 0;
116	var->red.length = 8;
117	var->green.length = 8;
118	var->blue.length = 8;
119	var->transp.length = 0;
120	var->transp.offset = 0;
121	break;
122	case 32:
123	var->red.offset = 16;
124	var->green.offset = 8;
125	var->blue.offset = 0;
126	var->red.length = 8;
127	var->green.length = 8;
128	var->blue.length = 8;
129	var->transp.length = 8;
130	var->transp.offset = 24;
131	break;
132	default:
133	DRM_ERROR("Bad depth %u.\n", depth);
134	return -EINVAL;
135	}
136
d7e1958d JB	137	if (!(vmw_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY) &&
	138	(var->xoffset != 0 \|\| var->yoffset != 0)) {
	139	DRM_ERROR("Can not handle panning without display topology\n");
fb1d9738 JB	140	return -EINVAL;
	141	}
	142
d7e1958d JB	143	if ((var->xoffset + var->xres) > par->max_width \|\|
d7e1958d JB	144	(var->yoffset + var->yres) > par->max_height) {
fb1d9738 JB	145	DRM_ERROR("Requested geom can not fit in framebuffer\n");
	146	return -EINVAL;
	147	}
	148
e133e737 TH	149	if (!vmw_kms_validate_mode_vram(vmw_priv,
	150	info->fix.line_length,
	151	var->yoffset + var->yres)) {
	152	DRM_ERROR("Requested geom can not fit in framebuffer\n");
	153	return -EINVAL;
	154	}
	155
fb1d9738 JB	156	return 0;
	157	}
	158
	159	static int vmw_fb_set_par(struct fb_info *info)
	160	{
	161	struct vmw_fb_par *par = info->par;
	162	struct vmw_private *vmw_priv = par->vmw_priv;
0bef23f9 MD	163	int ret;
	164
	165	ret = vmw_kms_write_svga(vmw_priv, info->var.xres, info->var.yres,
	166	info->fix.line_length,
	167	par->bpp, par->depth);
	168	if (ret)
	169	return ret;
fb1d9738	170
d7e1958d	171	if (vmw_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY) {
fb1d9738	172	/* TODO check if pitch and offset changes */
991b7b44	173	vmw_write(vmw_priv, SVGA_REG_NUM_GUEST_DISPLAYS, 1);
fb1d9738 JB	174	vmw_write(vmw_priv, SVGA_REG_DISPLAY_ID, 0);
	175	vmw_write(vmw_priv, SVGA_REG_DISPLAY_IS_PRIMARY, true);
	176	vmw_write(vmw_priv, SVGA_REG_DISPLAY_POSITION_X, info->var.xoffset);
	177	vmw_write(vmw_priv, SVGA_REG_DISPLAY_POSITION_Y, info->var.yoffset);
	178	vmw_write(vmw_priv, SVGA_REG_DISPLAY_WIDTH, info->var.xres);
	179	vmw_write(vmw_priv, SVGA_REG_DISPLAY_HEIGHT, info->var.yres);
	180	vmw_write(vmw_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
fb1d9738 JB	181	}
fb1d9738 JB	182
d7e1958d JB	183	/* This is really helpful since if this fails the user
	184	* can probably not see anything on the screen.
	185	*/
	186	WARN_ON(vmw_read(vmw_priv, SVGA_REG_FB_OFFSET) != 0);
	187
fb1d9738 JB	188	return 0;
	189	}
	190
	191	static int vmw_fb_pan_display(struct fb_var_screeninfo *var,
	192	struct fb_info *info)
	193	{
	194	return 0;
	195	}
	196
	197	static int vmw_fb_blank(int blank, struct fb_info *info)
	198	{
	199	return 0;
	200	}
	201
	202	/*
	203	* Dirty code
	204	*/
	205
	206	static void vmw_fb_dirty_flush(struct vmw_fb_par *par)
	207	{
	208	struct vmw_private *vmw_priv = par->vmw_priv;
	209	struct fb_info *info = vmw_priv->fb_info;
	210	int stride = (info->fix.line_length / 4);
	211	int src = (int )info->screen_base;
	212	__le32 __iomem *vram_mem = par->bo_ptr;
	213	unsigned long flags;
	214	unsigned x, y, w, h;
	215	int i, k;
	216	struct {
	217	uint32_t header;
	218	SVGAFifoCmdUpdate body;
	219	} *cmd;
	220
09e2601b TH	221	if (vmw_priv->suspended)
	222	return;
	223
fb1d9738 JB	224	spin_lock_irqsave(&par->dirty.lock, flags);
	225	if (!par->dirty.active) {
	226	spin_unlock_irqrestore(&par->dirty.lock, flags);
	227	return;
	228	}
	229	x = par->dirty.x1;
	230	y = par->dirty.y1;
	231	w = min(par->dirty.x2, info->var.xres) - x;
	232	h = min(par->dirty.y2, info->var.yres) - y;
	233	par->dirty.x1 = par->dirty.x2 = 0;
	234	par->dirty.y1 = par->dirty.y2 = 0;
	235	spin_unlock_irqrestore(&par->dirty.lock, flags);
	236
	237	for (i = y * stride; i < info->fix.smem_len / 4; i += stride) {
	238	for (k = i+x; k < i+x+w && k < info->fix.smem_len / 4; k++)
	239	iowrite32(src[k], vram_mem + k);
	240	}
	241
	242	#if 0
	243	DRM_INFO("%s, (%u, %u) (%ux%u)\n", __func__, x, y, w, h);
	244	#endif
	245
	246	cmd = vmw_fifo_reserve(vmw_priv, sizeof(*cmd));
	247	if (unlikely(cmd == NULL)) {
	248	DRM_ERROR("Fifo reserve failed.\n");
	249	return;
	250	}
	251
	252	cmd->header = cpu_to_le32(SVGA_CMD_UPDATE);
	253	cmd->body.x = cpu_to_le32(x);
	254	cmd->body.y = cpu_to_le32(y);
	255	cmd->body.width = cpu_to_le32(w);
	256	cmd->body.height = cpu_to_le32(h);
	257	vmw_fifo_commit(vmw_priv, sizeof(*cmd));
	258	}
	259
	260	static void vmw_fb_dirty_mark(struct vmw_fb_par *par,
	261	unsigned x1, unsigned y1,
	262	unsigned width, unsigned height)
	263	{
	264	struct fb_info *info = par->vmw_priv->fb_info;
	265	unsigned long flags;
	266	unsigned x2 = x1 + width;
	267	unsigned y2 = y1 + height;
	268
	269	spin_lock_irqsave(&par->dirty.lock, flags);
	270	if (par->dirty.x1 == par->dirty.x2) {
	271	par->dirty.x1 = x1;
	272	par->dirty.y1 = y1;
	273	par->dirty.x2 = x2;
	274	par->dirty.y2 = y2;
	275	/* if we are active start the dirty work
	276	* we share the work with the defio system */
	277	if (par->dirty.active)
	278	schedule_delayed_work(&info->deferred_work, VMW_DIRTY_DELAY);
	279	} else {
	280	if (x1 < par->dirty.x1)
	281	par->dirty.x1 = x1;
	282	if (y1 < par->dirty.y1)
	283	par->dirty.y1 = y1;
	284	if (x2 > par->dirty.x2)
	285	par->dirty.x2 = x2;
	286	if (y2 > par->dirty.y2)
	287	par->dirty.y2 = y2;
288	}
289	spin_unlock_irqrestore(&par->dirty.lock, flags);
290	}
291
292	static void vmw_deferred_io(struct fb_info *info,
293	struct list_head *pagelist)
294	{
295	struct vmw_fb_par *par = info->par;
296	unsigned long start, end, min, max;
297	unsigned long flags;
298	struct page *page;
299	int y1, y2;
300
301	min = ULONG_MAX;
302	max = 0;
303	list_for_each_entry(page, pagelist, lru) {
304	start = page->index << PAGE_SHIFT;
305	end = start + PAGE_SIZE - 1;
306	min = min(min, start);
307	max = max(max, end);
308	}
309
310	if (min < max) {
311	y1 = min / info->fix.line_length;
312	y2 = (max / info->fix.line_length) + 1;
313
314	spin_lock_irqsave(&par->dirty.lock, flags);
315	par->dirty.x1 = 0;
316	par->dirty.y1 = y1;
317	par->dirty.x2 = info->var.xres;
318	par->dirty.y2 = y2;
319	spin_unlock_irqrestore(&par->dirty.lock, flags);
320	}
321
322	vmw_fb_dirty_flush(par);
323	};
324
325	struct fb_deferred_io vmw_defio = {
326	.delay = VMW_DIRTY_DELAY,
327	.deferred_io = vmw_deferred_io,
328	};
329
330	/*
331	* Draw code
332	*/
333
334	static void vmw_fb_fillrect(struct fb_info info, const struct fb_fillrect rect)
335	{
336	cfb_fillrect(info, rect);
337	vmw_fb_dirty_mark(info->par, rect->dx, rect->dy,
338	rect->width, rect->height);
339	}
340
341	static void vmw_fb_copyarea(struct fb_info info, const struct fb_copyarea region)
342	{
343	cfb_copyarea(info, region);
344	vmw_fb_dirty_mark(info->par, region->dx, region->dy,
345	region->width, region->height);
346	}
347
348	static void vmw_fb_imageblit(struct fb_info info, const struct fb_image image)
349	{
350	cfb_imageblit(info, image);
351	vmw_fb_dirty_mark(info->par, image->dx, image->dy,
352	image->width, image->height);
353	}
354
355	/*
356	* Bring up code
357	*/
358
359	static struct fb_ops vmw_fb_ops = {
360	.owner = THIS_MODULE,
361	.fb_check_var = vmw_fb_check_var,
362	.fb_set_par = vmw_fb_set_par,
363	.fb_setcolreg = vmw_fb_setcolreg,
364	.fb_fillrect = vmw_fb_fillrect,
365	.fb_copyarea = vmw_fb_copyarea,
366	.fb_imageblit = vmw_fb_imageblit,
367	.fb_pan_display = vmw_fb_pan_display,
368	.fb_blank = vmw_fb_blank,
369	};
370
371	static int vmw_fb_create_bo(struct vmw_private *vmw_priv,
372	size_t size, struct vmw_dma_buffer **out)
373	{
374	struct vmw_dma_buffer *vmw_bo;
375	struct ttm_placement ne_placement = vmw_vram_ne_placement;
376	int ret;
377
378	ne_placement.lpfn = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
379
380	/* interuptable? */
381	ret = ttm_write_lock(&vmw_priv->fbdev_master.lock, false);
382	if (unlikely(ret != 0))
383	return ret;
384
385	vmw_bo = kmalloc(sizeof(*vmw_bo), GFP_KERNEL);
386	if (!vmw_bo)
387	goto err_unlock;
388
389	ret = vmw_dmabuf_init(vmw_priv, vmw_bo, size,
390	&ne_placement,
391	false,
392	&vmw_dmabuf_bo_free);
393	if (unlikely(ret != 0))
394	goto err_unlock; /* init frees the buffer on failure */
395
396	*out = vmw_bo;
397
398	ttm_write_unlock(&vmw_priv->fbdev_master.lock);
399
400	return 0;
401
402	err_unlock:
403	ttm_write_unlock(&vmw_priv->fbdev_master.lock);
404	return ret;
405	}
406
407	int vmw_fb_init(struct vmw_private *vmw_priv)
408	{
409	struct device *device = &vmw_priv->dev->pdev->dev;
410	struct vmw_fb_par *par;
411	struct fb_info *info;
412	unsigned initial_width, initial_height;
413	unsigned fb_width, fb_height;
6558429b	414	unsigned fb_bpp, fb_depth, fb_offset, fb_pitch, fb_size;
fb1d9738 JB	415	int ret;
fb1d9738 JB	416
6558429b	417	fb_bpp = 32;
fb1d9738 JB	418	fb_depth = 24;
fb1d9738 JB	419
d7e1958d JB	420	/* XXX As shouldn't these be as well. */
	421	fb_width = min(vmw_priv->fb_max_width, (unsigned)2048);
	422	fb_height = min(vmw_priv->fb_max_height, (unsigned)2048);
fb1d9738	423
eb4f923b JB	424	initial_width = min(vmw_priv->initial_width, fb_width);
eb4f923b JB	425	initial_height = min(vmw_priv->initial_height, fb_height);
fb1d9738	426
6558429b	427	fb_pitch = fb_width * fb_bpp / 8;
d7e1958d	428	fb_size = fb_pitch * fb_height;
fb1d9738	429	fb_offset = vmw_read(vmw_priv, SVGA_REG_FB_OFFSET);
fb1d9738 JB	430
	431	info = framebuffer_alloc(sizeof(*par), device);
	432	if (!info)
	433	return -ENOMEM;
	434
	435	/*
	436	* Par
	437	*/
	438	vmw_priv->fb_info = info;
	439	par = info->par;
	440	par->vmw_priv = vmw_priv;
	441	par->depth = fb_depth;
6558429b	442	par->bpp = fb_bpp;
fb1d9738 JB	443	par->vmalloc = NULL;
	444	par->max_width = fb_width;
	445	par->max_height = fb_height;
	446
	447	/*
	448	* Create buffers and alloc memory
	449	*/
	450	par->vmalloc = vmalloc(fb_size);
	451	if (unlikely(par->vmalloc == NULL)) {
	452	ret = -ENOMEM;
	453	goto err_free;
	454	}
	455
	456	ret = vmw_fb_create_bo(vmw_priv, fb_size, &par->vmw_bo);
	457	if (unlikely(ret != 0))
	458	goto err_free;
	459
	460	ret = ttm_bo_kmap(&par->vmw_bo->base,
	461	0,
	462	par->vmw_bo->base.num_pages,
	463	&par->map);
	464	if (unlikely(ret != 0))
	465	goto err_unref;
	466	par->bo_ptr = ttm_kmap_obj_virtual(&par->map, &par->bo_iowrite);
	467	par->bo_size = fb_size;
	468
	469	/*
	470	* Fixed and var
	471	*/
	472	strcpy(info->fix.id, "svgadrmfb");
	473	info->fix.type = FB_TYPE_PACKED_PIXELS;
	474	info->fix.visual = FB_VISUAL_TRUECOLOR;
	475	info->fix.type_aux = 0;
	476	info->fix.xpanstep = 1; /* doing it in hw */
	477	info->fix.ypanstep = 1; /* doing it in hw */
	478	info->fix.ywrapstep = 0;
	479	info->fix.accel = FB_ACCEL_NONE;
	480	info->fix.line_length = fb_pitch;
	481
	482	info->fix.smem_start = 0;
	483	info->fix.smem_len = fb_size;
	484
fb1d9738 JB	485	info->pseudo_palette = par->pseudo_palette;
	486	info->screen_base = par->vmalloc;
	487	info->screen_size = fb_size;
	488
	489	info->flags = FBINFO_DEFAULT;
	490	info->fbops = &vmw_fb_ops;
	491
	492	/* 24 depth per default */
	493	info->var.red.offset = 16;
	494	info->var.green.offset = 8;
	495	info->var.blue.offset = 0;
	496	info->var.red.length = 8;
	497	info->var.green.length = 8;
	498	info->var.blue.length = 8;
	499	info->var.transp.offset = 0;
	500	info->var.transp.length = 0;
	501
	502	info->var.xres_virtual = fb_width;
	503	info->var.yres_virtual = fb_height;
	504	info->var.bits_per_pixel = par->bpp;
	505	info->var.xoffset = 0;
	506	info->var.yoffset = 0;
	507	info->var.activate = FB_ACTIVATE_NOW;
	508	info->var.height = -1;
	509	info->var.width = -1;
	510
	511	info->var.xres = initial_width;
	512	info->var.yres = initial_height;
	513
fb2a99e1	514	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
fb1d9738	515
1471ca9a MS	516	info->apertures = alloc_apertures(1);
	517	if (!info->apertures) {
	518	ret = -ENOMEM;
	519	goto err_aper;
	520	}
	521	info->apertures->ranges[0].base = vmw_priv->vram_start;
	522	info->apertures->ranges[0].size = vmw_priv->vram_size;
f2d12b8e	523
fb1d9738 JB	524	/*
	525	* Dirty & Deferred IO
	526	*/
	527	par->dirty.x1 = par->dirty.x2 = 0;
c39721c7	528	par->dirty.y1 = par->dirty.y2 = 0;
fb1d9738 JB	529	par->dirty.active = true;
	530	spin_lock_init(&par->dirty.lock);
	531	info->fbdefio = &vmw_defio;
	532	fb_deferred_io_init(info);
	533
	534	ret = register_framebuffer(info);
	535	if (unlikely(ret != 0))
	536	goto err_defio;
	537
	538	return 0;
	539
	540	err_defio:
	541	fb_deferred_io_cleanup(info);
1471ca9a	542	err_aper:
fb1d9738 JB	543	ttm_bo_kunmap(&par->map);
	544	err_unref:
	545	ttm_bo_unref((struct ttm_buffer_object **)&par->vmw_bo);
	546	err_free:
	547	vfree(par->vmalloc);
	548	framebuffer_release(info);
	549	vmw_priv->fb_info = NULL;
	550
	551	return ret;
	552	}
	553
	554	int vmw_fb_close(struct vmw_private *vmw_priv)
	555	{
	556	struct fb_info *info;
	557	struct vmw_fb_par *par;
	558	struct ttm_buffer_object *bo;
	559
	560	if (!vmw_priv->fb_info)
	561	return 0;
	562
	563	info = vmw_priv->fb_info;
	564	par = info->par;
	565	bo = &par->vmw_bo->base;
	566	par->vmw_bo = NULL;
	567
	568	/* ??? order */
	569	fb_deferred_io_cleanup(info);
	570	unregister_framebuffer(info);
	571
	572	ttm_bo_kunmap(&par->map);
	573	ttm_bo_unref(&bo);
	574
	575	vfree(par->vmalloc);
	576	framebuffer_release(info);
	577
	578	return 0;
	579	}
	580
fb1d9738 JB	581	int vmw_fb_off(struct vmw_private *vmw_priv)
	582	{
	583	struct fb_info *info;
	584	struct vmw_fb_par *par;
	585	unsigned long flags;
	586
	587	if (!vmw_priv->fb_info)
	588	return -EINVAL;
	589
	590	info = vmw_priv->fb_info;
	591	par = info->par;
	592
	593	spin_lock_irqsave(&par->dirty.lock, flags);
	594	par->dirty.active = false;
	595	spin_unlock_irqrestore(&par->dirty.lock, flags);
	596
a6665944	597	flush_delayed_work_sync(&info->deferred_work);
fb1d9738 JB	598
	599	par->bo_ptr = NULL;
	600	ttm_bo_kunmap(&par->map);
	601
b37a6b9a	602	vmw_dmabuf_unpin(vmw_priv, par->vmw_bo, false);
fb1d9738 JB	603
	604	return 0;
	605	}
	606
	607	int vmw_fb_on(struct vmw_private *vmw_priv)
	608	{
	609	struct fb_info *info;
	610	struct vmw_fb_par *par;
	611	unsigned long flags;
	612	bool dummy;
	613	int ret;
	614
	615	if (!vmw_priv->fb_info)
	616	return -EINVAL;
	617
	618	info = vmw_priv->fb_info;
	619	par = info->par;
	620
	621	/* we are already active */
	622	if (par->bo_ptr != NULL)
	623	return 0;
	624
	625	/* Make sure that all overlays are stoped when we take over */
	626	vmw_overlay_stop_all(vmw_priv);
	627
d991ef03	628	ret = vmw_dmabuf_to_start_of_vram(vmw_priv, par->vmw_bo, true, false);
fb1d9738 JB	629	if (unlikely(ret != 0)) {
	630	DRM_ERROR("could not move buffer to start of VRAM\n");
	631	goto err_no_buffer;
	632	}
	633
	634	ret = ttm_bo_kmap(&par->vmw_bo->base,
	635	0,
	636	par->vmw_bo->base.num_pages,
	637	&par->map);
	638	BUG_ON(ret != 0);
	639	par->bo_ptr = ttm_kmap_obj_virtual(&par->map, &dummy);
	640
	641	spin_lock_irqsave(&par->dirty.lock, flags);
	642	par->dirty.active = true;
	643	spin_unlock_irqrestore(&par->dirty.lock, flags);
	644
	645	err_no_buffer:
	646	vmw_fb_set_par(info);
	647
	648	vmw_fb_dirty_mark(par, 0, 0, info->var.xres, info->var.yres);
	649
	650	/* If there already was stuff dirty we wont
	651	* schedule a new work, so lets do it now */
	652	schedule_delayed_work(&info->deferred_work, 0);
	653
	654	return 0;
	655	}