- 根目录:
- 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(&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;
}