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![Thomas Hellstrom](/assets/img/avatar_default.png)
Commit "drm/vmwgfx: correct fb_fix_screeninfo.line_length", while fixing a vmwgfx fbdev bug, also writes the pitch to a supposedly read-only register: SVGA_REG_BYTES_PER_LINE, while it should be (and also in fact is) written to SVGA_REG_PITCHLOCK. This patch is Cc'd stable because of the unknown effects writing to this register might have, particularly on older device versions. v2: Updated log message. Cc: stable@vger.kernel.org Cc: Christopher Friedt <chrisfriedt@gmail.com> Tested-by: Christopher Friedt <chrisfriedt@gmail.com> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
656 lines
16 KiB
C
656 lines
16 KiB
C
/**************************************************************************
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*
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* Copyright © 2007 David Airlie
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* Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#include <linux/export.h>
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#include <drm/drmP.h>
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#include "vmwgfx_drv.h"
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#include <drm/ttm/ttm_placement.h>
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#define VMW_DIRTY_DELAY (HZ / 30)
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struct vmw_fb_par {
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struct vmw_private *vmw_priv;
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void *vmalloc;
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struct vmw_dma_buffer *vmw_bo;
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struct ttm_bo_kmap_obj map;
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u32 pseudo_palette[17];
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unsigned depth;
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unsigned bpp;
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unsigned max_width;
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unsigned max_height;
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void *bo_ptr;
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unsigned bo_size;
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bool bo_iowrite;
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struct {
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spinlock_t lock;
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bool active;
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unsigned x1;
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unsigned y1;
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unsigned x2;
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unsigned y2;
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} dirty;
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};
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static int vmw_fb_setcolreg(unsigned regno, unsigned red, unsigned green,
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unsigned blue, unsigned transp,
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struct fb_info *info)
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{
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struct vmw_fb_par *par = info->par;
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u32 *pal = par->pseudo_palette;
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if (regno > 15) {
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DRM_ERROR("Bad regno %u.\n", regno);
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return 1;
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}
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switch (par->depth) {
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case 24:
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case 32:
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pal[regno] = ((red & 0xff00) << 8) |
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(green & 0xff00) |
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((blue & 0xff00) >> 8);
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break;
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default:
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DRM_ERROR("Bad depth %u, bpp %u.\n", par->depth, par->bpp);
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return 1;
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}
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return 0;
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}
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static int vmw_fb_check_var(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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int depth = var->bits_per_pixel;
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struct vmw_fb_par *par = info->par;
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struct vmw_private *vmw_priv = par->vmw_priv;
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switch (var->bits_per_pixel) {
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case 32:
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depth = (var->transp.length > 0) ? 32 : 24;
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break;
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default:
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DRM_ERROR("Bad bpp %u.\n", var->bits_per_pixel);
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return -EINVAL;
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}
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switch (depth) {
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case 24:
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var->red.offset = 16;
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var->green.offset = 8;
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var->blue.offset = 0;
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var->red.length = 8;
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var->green.length = 8;
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var->blue.length = 8;
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var->transp.length = 0;
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var->transp.offset = 0;
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break;
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case 32:
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var->red.offset = 16;
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var->green.offset = 8;
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var->blue.offset = 0;
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var->red.length = 8;
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var->green.length = 8;
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var->blue.length = 8;
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var->transp.length = 8;
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var->transp.offset = 24;
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break;
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default:
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DRM_ERROR("Bad depth %u.\n", depth);
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return -EINVAL;
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}
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if (!(vmw_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY) &&
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(var->xoffset != 0 || var->yoffset != 0)) {
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DRM_ERROR("Can not handle panning without display topology\n");
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return -EINVAL;
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}
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if ((var->xoffset + var->xres) > par->max_width ||
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(var->yoffset + var->yres) > par->max_height) {
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DRM_ERROR("Requested geom can not fit in framebuffer\n");
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return -EINVAL;
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}
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if (!vmw_kms_validate_mode_vram(vmw_priv,
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var->xres * var->bits_per_pixel/8,
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var->yoffset + var->yres)) {
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DRM_ERROR("Requested geom can not fit in framebuffer\n");
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return -EINVAL;
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}
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return 0;
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}
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static int vmw_fb_set_par(struct fb_info *info)
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{
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struct vmw_fb_par *par = info->par;
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struct vmw_private *vmw_priv = par->vmw_priv;
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int ret;
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info->fix.line_length = info->var.xres * info->var.bits_per_pixel/8;
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ret = vmw_kms_write_svga(vmw_priv, info->var.xres, info->var.yres,
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info->fix.line_length,
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par->bpp, par->depth);
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if (ret)
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return ret;
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if (vmw_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY) {
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/* TODO check if pitch and offset changes */
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vmw_write(vmw_priv, SVGA_REG_NUM_GUEST_DISPLAYS, 1);
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vmw_write(vmw_priv, SVGA_REG_DISPLAY_ID, 0);
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vmw_write(vmw_priv, SVGA_REG_DISPLAY_IS_PRIMARY, true);
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vmw_write(vmw_priv, SVGA_REG_DISPLAY_POSITION_X, info->var.xoffset);
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vmw_write(vmw_priv, SVGA_REG_DISPLAY_POSITION_Y, info->var.yoffset);
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vmw_write(vmw_priv, SVGA_REG_DISPLAY_WIDTH, info->var.xres);
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vmw_write(vmw_priv, SVGA_REG_DISPLAY_HEIGHT, info->var.yres);
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vmw_write(vmw_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
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}
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/* This is really helpful since if this fails the user
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* can probably not see anything on the screen.
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*/
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WARN_ON(vmw_read(vmw_priv, SVGA_REG_FB_OFFSET) != 0);
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return 0;
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}
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static int vmw_fb_pan_display(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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return 0;
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}
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static int vmw_fb_blank(int blank, struct fb_info *info)
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{
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return 0;
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}
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/*
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* Dirty code
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*/
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static void vmw_fb_dirty_flush(struct vmw_fb_par *par)
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{
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struct vmw_private *vmw_priv = par->vmw_priv;
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struct fb_info *info = vmw_priv->fb_info;
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int stride = (info->fix.line_length / 4);
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int *src = (int *)info->screen_base;
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__le32 __iomem *vram_mem = par->bo_ptr;
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unsigned long flags;
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unsigned x, y, w, h;
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int i, k;
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struct {
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uint32_t header;
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SVGAFifoCmdUpdate body;
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} *cmd;
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if (vmw_priv->suspended)
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return;
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spin_lock_irqsave(&par->dirty.lock, flags);
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if (!par->dirty.active) {
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spin_unlock_irqrestore(&par->dirty.lock, flags);
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return;
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}
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x = par->dirty.x1;
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y = par->dirty.y1;
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w = min(par->dirty.x2, info->var.xres) - x;
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h = min(par->dirty.y2, info->var.yres) - y;
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par->dirty.x1 = par->dirty.x2 = 0;
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par->dirty.y1 = par->dirty.y2 = 0;
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spin_unlock_irqrestore(&par->dirty.lock, flags);
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for (i = y * stride; i < info->fix.smem_len / 4; i += stride) {
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for (k = i+x; k < i+x+w && k < info->fix.smem_len / 4; k++)
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iowrite32(src[k], vram_mem + k);
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}
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#if 0
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DRM_INFO("%s, (%u, %u) (%ux%u)\n", __func__, x, y, w, h);
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#endif
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cmd = vmw_fifo_reserve(vmw_priv, sizeof(*cmd));
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if (unlikely(cmd == NULL)) {
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DRM_ERROR("Fifo reserve failed.\n");
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return;
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}
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cmd->header = cpu_to_le32(SVGA_CMD_UPDATE);
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cmd->body.x = cpu_to_le32(x);
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cmd->body.y = cpu_to_le32(y);
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cmd->body.width = cpu_to_le32(w);
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cmd->body.height = cpu_to_le32(h);
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vmw_fifo_commit(vmw_priv, sizeof(*cmd));
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}
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static void vmw_fb_dirty_mark(struct vmw_fb_par *par,
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unsigned x1, unsigned y1,
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unsigned width, unsigned height)
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{
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struct fb_info *info = par->vmw_priv->fb_info;
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unsigned long flags;
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unsigned x2 = x1 + width;
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unsigned y2 = y1 + height;
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spin_lock_irqsave(&par->dirty.lock, flags);
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if (par->dirty.x1 == par->dirty.x2) {
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par->dirty.x1 = x1;
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par->dirty.y1 = y1;
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par->dirty.x2 = x2;
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par->dirty.y2 = y2;
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/* if we are active start the dirty work
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* we share the work with the defio system */
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if (par->dirty.active)
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schedule_delayed_work(&info->deferred_work, VMW_DIRTY_DELAY);
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} else {
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if (x1 < par->dirty.x1)
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par->dirty.x1 = x1;
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if (y1 < par->dirty.y1)
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par->dirty.y1 = y1;
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if (x2 > par->dirty.x2)
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par->dirty.x2 = x2;
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if (y2 > par->dirty.y2)
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par->dirty.y2 = y2;
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}
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spin_unlock_irqrestore(&par->dirty.lock, flags);
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}
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static void vmw_deferred_io(struct fb_info *info,
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struct list_head *pagelist)
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{
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struct vmw_fb_par *par = info->par;
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unsigned long start, end, min, max;
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unsigned long flags;
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struct page *page;
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int y1, y2;
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min = ULONG_MAX;
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max = 0;
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list_for_each_entry(page, pagelist, lru) {
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start = page->index << PAGE_SHIFT;
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end = start + PAGE_SIZE - 1;
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min = min(min, start);
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max = max(max, end);
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}
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if (min < max) {
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y1 = min / info->fix.line_length;
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y2 = (max / info->fix.line_length) + 1;
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spin_lock_irqsave(&par->dirty.lock, flags);
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par->dirty.x1 = 0;
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par->dirty.y1 = y1;
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par->dirty.x2 = info->var.xres;
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par->dirty.y2 = y2;
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spin_unlock_irqrestore(&par->dirty.lock, flags);
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}
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vmw_fb_dirty_flush(par);
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};
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struct fb_deferred_io vmw_defio = {
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.delay = VMW_DIRTY_DELAY,
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.deferred_io = vmw_deferred_io,
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};
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/*
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* Draw code
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*/
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static void vmw_fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
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{
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cfb_fillrect(info, rect);
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vmw_fb_dirty_mark(info->par, rect->dx, rect->dy,
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rect->width, rect->height);
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}
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static void vmw_fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
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{
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cfb_copyarea(info, region);
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vmw_fb_dirty_mark(info->par, region->dx, region->dy,
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region->width, region->height);
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}
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static void vmw_fb_imageblit(struct fb_info *info, const struct fb_image *image)
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{
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cfb_imageblit(info, image);
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vmw_fb_dirty_mark(info->par, image->dx, image->dy,
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image->width, image->height);
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}
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/*
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* Bring up code
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*/
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static struct fb_ops vmw_fb_ops = {
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.owner = THIS_MODULE,
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.fb_check_var = vmw_fb_check_var,
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.fb_set_par = vmw_fb_set_par,
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.fb_setcolreg = vmw_fb_setcolreg,
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.fb_fillrect = vmw_fb_fillrect,
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.fb_copyarea = vmw_fb_copyarea,
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.fb_imageblit = vmw_fb_imageblit,
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.fb_pan_display = vmw_fb_pan_display,
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.fb_blank = vmw_fb_blank,
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};
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static int vmw_fb_create_bo(struct vmw_private *vmw_priv,
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size_t size, struct vmw_dma_buffer **out)
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{
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struct vmw_dma_buffer *vmw_bo;
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struct ttm_placement ne_placement = vmw_vram_ne_placement;
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int ret;
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ne_placement.lpfn = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
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(void) ttm_write_lock(&vmw_priv->reservation_sem, false);
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vmw_bo = kmalloc(sizeof(*vmw_bo), GFP_KERNEL);
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if (!vmw_bo) {
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ret = -ENOMEM;
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goto err_unlock;
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}
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ret = vmw_dmabuf_init(vmw_priv, vmw_bo, size,
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&ne_placement,
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false,
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&vmw_dmabuf_bo_free);
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if (unlikely(ret != 0))
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goto err_unlock; /* init frees the buffer on failure */
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*out = vmw_bo;
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ttm_write_unlock(&vmw_priv->fbdev_master.lock);
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return 0;
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err_unlock:
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ttm_write_unlock(&vmw_priv->fbdev_master.lock);
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return ret;
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}
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int vmw_fb_init(struct vmw_private *vmw_priv)
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{
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struct device *device = &vmw_priv->dev->pdev->dev;
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struct vmw_fb_par *par;
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struct fb_info *info;
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unsigned initial_width, initial_height;
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unsigned fb_width, fb_height;
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unsigned fb_bpp, fb_depth, fb_offset, fb_pitch, fb_size;
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int ret;
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fb_bpp = 32;
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fb_depth = 24;
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/* XXX As shouldn't these be as well. */
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fb_width = min(vmw_priv->fb_max_width, (unsigned)2048);
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fb_height = min(vmw_priv->fb_max_height, (unsigned)2048);
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initial_width = min(vmw_priv->initial_width, fb_width);
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initial_height = min(vmw_priv->initial_height, fb_height);
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fb_pitch = fb_width * fb_bpp / 8;
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fb_size = fb_pitch * fb_height;
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fb_offset = vmw_read(vmw_priv, SVGA_REG_FB_OFFSET);
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info = framebuffer_alloc(sizeof(*par), device);
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if (!info)
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return -ENOMEM;
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/*
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* Par
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*/
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vmw_priv->fb_info = info;
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par = info->par;
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par->vmw_priv = vmw_priv;
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par->depth = fb_depth;
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par->bpp = fb_bpp;
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par->vmalloc = NULL;
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par->max_width = fb_width;
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par->max_height = fb_height;
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/*
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* Create buffers and alloc memory
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*/
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par->vmalloc = vmalloc(fb_size);
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if (unlikely(par->vmalloc == NULL)) {
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ret = -ENOMEM;
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goto err_free;
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}
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ret = vmw_fb_create_bo(vmw_priv, fb_size, &par->vmw_bo);
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if (unlikely(ret != 0))
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goto err_free;
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ret = ttm_bo_kmap(&par->vmw_bo->base,
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0,
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par->vmw_bo->base.num_pages,
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&par->map);
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if (unlikely(ret != 0))
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goto err_unref;
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par->bo_ptr = ttm_kmap_obj_virtual(&par->map, &par->bo_iowrite);
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par->bo_size = fb_size;
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/*
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* Fixed and var
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*/
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strcpy(info->fix.id, "svgadrmfb");
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info->fix.type = FB_TYPE_PACKED_PIXELS;
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info->fix.visual = FB_VISUAL_TRUECOLOR;
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info->fix.type_aux = 0;
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info->fix.xpanstep = 1; /* doing it in hw */
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info->fix.ypanstep = 1; /* doing it in hw */
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info->fix.ywrapstep = 0;
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info->fix.accel = FB_ACCEL_NONE;
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info->fix.line_length = fb_pitch;
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info->fix.smem_start = 0;
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info->fix.smem_len = fb_size;
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info->pseudo_palette = par->pseudo_palette;
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info->screen_base = par->vmalloc;
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info->screen_size = fb_size;
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|
|
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;
|
|
}
|