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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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5117bd898e
- None of the list walkings where protected. - Switch to a mutex since the list walking at device resume time can sleep when pinning buffers through the tiler. Only thing we need to be careful with here is that while we walk the list we can't unreference any gem objects, since the final unref would result in a recursive deadlock. But the only functions that walk the list is the device resume and debugfs dumping, so all safe. Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
/*
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* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
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* Author: Rob Clark <rob.clark@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/seq_file.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_fb_helper.h>
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#include "omap_drv.h"
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#include "omap_dmm_tiler.h"
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#ifdef CONFIG_DEBUG_FS
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static int gem_show(struct seq_file *m, void *arg)
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{
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struct drm_info_node *node = (struct drm_info_node *) m->private;
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struct drm_device *dev = node->minor->dev;
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struct omap_drm_private *priv = dev->dev_private;
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seq_printf(m, "All Objects:\n");
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mutex_lock(&priv->list_lock);
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omap_gem_describe_objects(&priv->obj_list, m);
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mutex_unlock(&priv->list_lock);
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return 0;
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}
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static int mm_show(struct seq_file *m, void *arg)
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{
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struct drm_info_node *node = (struct drm_info_node *) m->private;
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struct drm_device *dev = node->minor->dev;
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struct drm_printer p = drm_seq_file_printer(m);
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drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p);
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return 0;
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}
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#ifdef CONFIG_DRM_FBDEV_EMULATION
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static int fb_show(struct seq_file *m, void *arg)
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{
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struct drm_info_node *node = (struct drm_info_node *) m->private;
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struct drm_device *dev = node->minor->dev;
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struct omap_drm_private *priv = dev->dev_private;
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struct drm_framebuffer *fb;
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seq_printf(m, "fbcon ");
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omap_framebuffer_describe(priv->fbdev->fb, m);
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mutex_lock(&dev->mode_config.fb_lock);
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list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
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if (fb == priv->fbdev->fb)
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continue;
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seq_printf(m, "user ");
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omap_framebuffer_describe(fb, m);
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}
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mutex_unlock(&dev->mode_config.fb_lock);
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return 0;
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}
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#endif
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/* list of debufs files that are applicable to all devices */
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static struct drm_info_list omap_debugfs_list[] = {
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{"gem", gem_show, 0},
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{"mm", mm_show, 0},
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#ifdef CONFIG_DRM_FBDEV_EMULATION
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{"fb", fb_show, 0},
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#endif
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};
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/* list of debugfs files that are specific to devices with dmm/tiler */
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static struct drm_info_list omap_dmm_debugfs_list[] = {
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{"tiler_map", tiler_map_show, 0},
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};
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int omap_debugfs_init(struct drm_minor *minor)
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{
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struct drm_device *dev = minor->dev;
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int ret;
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ret = drm_debugfs_create_files(omap_debugfs_list,
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ARRAY_SIZE(omap_debugfs_list),
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minor->debugfs_root, minor);
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if (ret) {
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dev_err(dev->dev, "could not install omap_debugfs_list\n");
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return ret;
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}
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if (dmm_is_available())
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ret = drm_debugfs_create_files(omap_dmm_debugfs_list,
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ARRAY_SIZE(omap_dmm_debugfs_list),
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minor->debugfs_root, minor);
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if (ret) {
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dev_err(dev->dev, "could not install omap_dmm_debugfs_list\n");
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return ret;
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}
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return ret;
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}
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#endif
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