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![Mohammed Khajapasha](/assets/img/avatar_default.png)
Use local memory io BAR address for fbdev's fb_mmap() operation on discrete, fbdev uses the physical address of our framebuffer for its fb_mmap() fn. Signed-off-by: Mohammed Khajapasha <mohammed.khajapasha@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Signed-off-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210427085417.120246-5-matthew.auld@intel.com
656 lines
18 KiB
C
656 lines
18 KiB
C
/*
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* Copyright © 2007 David Airlie
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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 "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* 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 NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* David Airlie
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*/
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#include <linux/async.h>
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#include <linux/console.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/sysrq.h>
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#include <linux/tty.h>
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#include <linux/vga_switcheroo.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 <drm/drm_fourcc.h>
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#include "gem/i915_gem_lmem.h"
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#include "i915_drv.h"
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#include "intel_display_types.h"
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#include "intel_fbdev.h"
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#include "intel_frontbuffer.h"
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static struct intel_frontbuffer *to_frontbuffer(struct intel_fbdev *ifbdev)
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{
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return ifbdev->fb->frontbuffer;
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}
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static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
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{
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intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU);
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}
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static int intel_fbdev_set_par(struct fb_info *info)
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{
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struct drm_fb_helper *fb_helper = info->par;
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struct intel_fbdev *ifbdev =
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container_of(fb_helper, struct intel_fbdev, helper);
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int ret;
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ret = drm_fb_helper_set_par(info);
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if (ret == 0)
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intel_fbdev_invalidate(ifbdev);
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return ret;
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}
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static int intel_fbdev_blank(int blank, struct fb_info *info)
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{
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struct drm_fb_helper *fb_helper = info->par;
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struct intel_fbdev *ifbdev =
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container_of(fb_helper, struct intel_fbdev, helper);
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int ret;
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ret = drm_fb_helper_blank(blank, info);
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if (ret == 0)
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intel_fbdev_invalidate(ifbdev);
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return ret;
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}
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static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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struct drm_fb_helper *fb_helper = info->par;
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struct intel_fbdev *ifbdev =
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container_of(fb_helper, struct intel_fbdev, helper);
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int ret;
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ret = drm_fb_helper_pan_display(var, info);
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if (ret == 0)
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intel_fbdev_invalidate(ifbdev);
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return ret;
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}
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static const struct fb_ops intelfb_ops = {
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.owner = THIS_MODULE,
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DRM_FB_HELPER_DEFAULT_OPS,
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.fb_set_par = intel_fbdev_set_par,
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.fb_fillrect = drm_fb_helper_cfb_fillrect,
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.fb_copyarea = drm_fb_helper_cfb_copyarea,
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.fb_imageblit = drm_fb_helper_cfb_imageblit,
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.fb_pan_display = intel_fbdev_pan_display,
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.fb_blank = intel_fbdev_blank,
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};
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static int intelfb_alloc(struct drm_fb_helper *helper,
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struct drm_fb_helper_surface_size *sizes)
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{
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struct intel_fbdev *ifbdev =
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container_of(helper, struct intel_fbdev, helper);
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struct drm_framebuffer *fb;
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struct drm_device *dev = helper->dev;
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struct drm_i915_private *dev_priv = to_i915(dev);
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struct drm_mode_fb_cmd2 mode_cmd = {};
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struct drm_i915_gem_object *obj;
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int size;
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/* we don't do packed 24bpp */
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if (sizes->surface_bpp == 24)
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sizes->surface_bpp = 32;
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mode_cmd.width = sizes->surface_width;
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mode_cmd.height = sizes->surface_height;
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mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
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DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
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mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
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sizes->surface_depth);
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size = mode_cmd.pitches[0] * mode_cmd.height;
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size = PAGE_ALIGN(size);
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/* If the FB is too big, just don't use it since fbdev is not very
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* important and we should probably use that space with FBC or other
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* features. */
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obj = ERR_PTR(-ENODEV);
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if (size * 2 < dev_priv->stolen_usable_size)
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obj = i915_gem_object_create_stolen(dev_priv, size);
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if (IS_ERR(obj))
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obj = i915_gem_object_create_shmem(dev_priv, size);
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if (IS_ERR(obj)) {
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drm_err(&dev_priv->drm, "failed to allocate framebuffer\n");
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return PTR_ERR(obj);
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}
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fb = intel_framebuffer_create(obj, &mode_cmd);
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i915_gem_object_put(obj);
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if (IS_ERR(fb))
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return PTR_ERR(fb);
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ifbdev->fb = to_intel_framebuffer(fb);
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return 0;
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}
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static int intelfb_create(struct drm_fb_helper *helper,
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struct drm_fb_helper_surface_size *sizes)
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{
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struct intel_fbdev *ifbdev =
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container_of(helper, struct intel_fbdev, helper);
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struct intel_framebuffer *intel_fb = ifbdev->fb;
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struct drm_device *dev = helper->dev;
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struct drm_i915_private *dev_priv = to_i915(dev);
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struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
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struct i915_ggtt *ggtt = &dev_priv->ggtt;
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const struct i915_ggtt_view view = {
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.type = I915_GGTT_VIEW_NORMAL,
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};
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intel_wakeref_t wakeref;
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struct fb_info *info;
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struct i915_vma *vma;
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unsigned long flags = 0;
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bool prealloc = false;
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void __iomem *vaddr;
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struct drm_i915_gem_object *obj;
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int ret;
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if (intel_fb &&
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(sizes->fb_width > intel_fb->base.width ||
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sizes->fb_height > intel_fb->base.height)) {
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drm_dbg_kms(&dev_priv->drm,
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"BIOS fb too small (%dx%d), we require (%dx%d),"
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" releasing it\n",
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intel_fb->base.width, intel_fb->base.height,
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sizes->fb_width, sizes->fb_height);
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drm_framebuffer_put(&intel_fb->base);
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intel_fb = ifbdev->fb = NULL;
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}
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if (!intel_fb || drm_WARN_ON(dev, !intel_fb_obj(&intel_fb->base))) {
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drm_dbg_kms(&dev_priv->drm,
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"no BIOS fb, allocating a new one\n");
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ret = intelfb_alloc(helper, sizes);
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if (ret)
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return ret;
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intel_fb = ifbdev->fb;
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} else {
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drm_dbg_kms(&dev_priv->drm, "re-using BIOS fb\n");
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prealloc = true;
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sizes->fb_width = intel_fb->base.width;
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sizes->fb_height = intel_fb->base.height;
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}
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wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
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/* Pin the GGTT vma for our access via info->screen_base.
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* This also validates that any existing fb inherited from the
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* BIOS is suitable for own access.
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*/
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vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, false,
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&view, false, &flags);
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if (IS_ERR(vma)) {
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ret = PTR_ERR(vma);
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goto out_unlock;
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}
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intel_frontbuffer_flush(to_frontbuffer(ifbdev), ORIGIN_DIRTYFB);
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info = drm_fb_helper_alloc_fbi(helper);
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if (IS_ERR(info)) {
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drm_err(&dev_priv->drm, "Failed to allocate fb_info\n");
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ret = PTR_ERR(info);
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goto out_unpin;
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}
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ifbdev->helper.fb = &ifbdev->fb->base;
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info->fbops = &intelfb_ops;
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/* setup aperture base/size for vesafb takeover */
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obj = intel_fb_obj(&intel_fb->base);
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if (i915_gem_object_is_lmem(obj)) {
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struct intel_memory_region *mem = obj->mm.region;
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info->apertures->ranges[0].base = mem->io_start;
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info->apertures->ranges[0].size = mem->total;
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/* Use fbdev's framebuffer from lmem for discrete */
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info->fix.smem_start =
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(unsigned long)(mem->io_start +
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i915_gem_object_get_dma_address(obj, 0));
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info->fix.smem_len = obj->base.size;
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} else {
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info->apertures->ranges[0].base = ggtt->gmadr.start;
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info->apertures->ranges[0].size = ggtt->mappable_end;
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/* Our framebuffer is the entirety of fbdev's system memory */
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info->fix.smem_start =
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(unsigned long)(ggtt->gmadr.start + vma->node.start);
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info->fix.smem_len = vma->node.size;
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}
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vaddr = i915_vma_pin_iomap(vma);
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if (IS_ERR(vaddr)) {
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drm_err(&dev_priv->drm,
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"Failed to remap framebuffer into virtual memory\n");
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ret = PTR_ERR(vaddr);
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goto out_unpin;
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}
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info->screen_base = vaddr;
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info->screen_size = vma->node.size;
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drm_fb_helper_fill_info(info, &ifbdev->helper, sizes);
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/* If the object is shmemfs backed, it will have given us zeroed pages.
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* If the object is stolen however, it will be full of whatever
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* garbage was left in there.
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*/
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if (!i915_gem_object_is_shmem(vma->obj) && !prealloc)
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memset_io(info->screen_base, 0, info->screen_size);
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/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
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drm_dbg_kms(&dev_priv->drm, "allocated %dx%d fb: 0x%08x\n",
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ifbdev->fb->base.width, ifbdev->fb->base.height,
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i915_ggtt_offset(vma));
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ifbdev->vma = vma;
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ifbdev->vma_flags = flags;
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intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
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vga_switcheroo_client_fb_set(pdev, info);
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return 0;
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out_unpin:
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intel_unpin_fb_vma(vma, flags);
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out_unlock:
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intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
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return ret;
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}
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static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
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.fb_probe = intelfb_create,
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};
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static void intel_fbdev_destroy(struct intel_fbdev *ifbdev)
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{
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/* We rely on the object-free to release the VMA pinning for
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* the info->screen_base mmaping. Leaking the VMA is simpler than
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* trying to rectify all the possible error paths leading here.
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*/
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drm_fb_helper_fini(&ifbdev->helper);
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if (ifbdev->vma)
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intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags);
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if (ifbdev->fb)
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drm_framebuffer_remove(&ifbdev->fb->base);
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kfree(ifbdev);
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}
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/*
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* Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
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* The core display code will have read out the current plane configuration,
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* so we use that to figure out if there's an object for us to use as the
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* fb, and if so, we re-use it for the fbdev configuration.
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*
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* Note we only support a single fb shared across pipes for boot (mostly for
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* fbcon), so we just find the biggest and use that.
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*/
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static bool intel_fbdev_init_bios(struct drm_device *dev,
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struct intel_fbdev *ifbdev)
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{
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struct drm_i915_private *i915 = to_i915(dev);
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struct intel_framebuffer *fb = NULL;
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struct drm_crtc *crtc;
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struct intel_crtc *intel_crtc;
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unsigned int max_size = 0;
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/* Find the largest fb */
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for_each_crtc(dev, crtc) {
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struct drm_i915_gem_object *obj =
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intel_fb_obj(crtc->primary->state->fb);
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intel_crtc = to_intel_crtc(crtc);
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if (!crtc->state->active || !obj) {
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drm_dbg_kms(&i915->drm,
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"pipe %c not active or no fb, skipping\n",
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pipe_name(intel_crtc->pipe));
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continue;
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}
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if (obj->base.size > max_size) {
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drm_dbg_kms(&i915->drm,
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"found possible fb from plane %c\n",
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pipe_name(intel_crtc->pipe));
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fb = to_intel_framebuffer(crtc->primary->state->fb);
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max_size = obj->base.size;
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}
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}
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if (!fb) {
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drm_dbg_kms(&i915->drm,
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"no active fbs found, not using BIOS config\n");
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goto out;
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}
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/* Now make sure all the pipes will fit into it */
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for_each_crtc(dev, crtc) {
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unsigned int cur_size;
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intel_crtc = to_intel_crtc(crtc);
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if (!crtc->state->active) {
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drm_dbg_kms(&i915->drm,
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"pipe %c not active, skipping\n",
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pipe_name(intel_crtc->pipe));
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continue;
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}
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drm_dbg_kms(&i915->drm, "checking plane %c for BIOS fb\n",
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pipe_name(intel_crtc->pipe));
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/*
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* See if the plane fb we found above will fit on this
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* pipe. Note we need to use the selected fb's pitch and bpp
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* rather than the current pipe's, since they differ.
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*/
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cur_size = crtc->state->adjusted_mode.crtc_hdisplay;
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cur_size = cur_size * fb->base.format->cpp[0];
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if (fb->base.pitches[0] < cur_size) {
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drm_dbg_kms(&i915->drm,
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"fb not wide enough for plane %c (%d vs %d)\n",
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pipe_name(intel_crtc->pipe),
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cur_size, fb->base.pitches[0]);
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fb = NULL;
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break;
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}
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cur_size = crtc->state->adjusted_mode.crtc_vdisplay;
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cur_size = intel_fb_align_height(&fb->base, 0, cur_size);
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cur_size *= fb->base.pitches[0];
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drm_dbg_kms(&i915->drm,
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"pipe %c area: %dx%d, bpp: %d, size: %d\n",
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pipe_name(intel_crtc->pipe),
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crtc->state->adjusted_mode.crtc_hdisplay,
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crtc->state->adjusted_mode.crtc_vdisplay,
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fb->base.format->cpp[0] * 8,
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cur_size);
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if (cur_size > max_size) {
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drm_dbg_kms(&i915->drm,
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"fb not big enough for plane %c (%d vs %d)\n",
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pipe_name(intel_crtc->pipe),
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cur_size, max_size);
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fb = NULL;
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break;
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}
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drm_dbg_kms(&i915->drm,
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"fb big enough for plane %c (%d >= %d)\n",
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pipe_name(intel_crtc->pipe),
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max_size, cur_size);
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}
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if (!fb) {
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drm_dbg_kms(&i915->drm,
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"BIOS fb not suitable for all pipes, not using\n");
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goto out;
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}
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ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8;
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ifbdev->fb = fb;
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drm_framebuffer_get(&ifbdev->fb->base);
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/* Final pass to check if any active pipes don't have fbs */
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for_each_crtc(dev, crtc) {
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intel_crtc = to_intel_crtc(crtc);
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if (!crtc->state->active)
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continue;
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drm_WARN(dev, !crtc->primary->state->fb,
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"re-used BIOS config but lost an fb on crtc %d\n",
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crtc->base.id);
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}
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drm_dbg_kms(&i915->drm, "using BIOS fb for initial console\n");
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return true;
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out:
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return false;
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}
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static void intel_fbdev_suspend_worker(struct work_struct *work)
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{
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intel_fbdev_set_suspend(&container_of(work,
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struct drm_i915_private,
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fbdev_suspend_work)->drm,
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FBINFO_STATE_RUNNING,
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true);
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}
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int intel_fbdev_init(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = to_i915(dev);
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struct intel_fbdev *ifbdev;
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int ret;
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|
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if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv)))
|
|
return -ENODEV;
|
|
|
|
ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
|
|
if (ifbdev == NULL)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&ifbdev->hpd_lock);
|
|
drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
|
|
|
|
if (!intel_fbdev_init_bios(dev, ifbdev))
|
|
ifbdev->preferred_bpp = 32;
|
|
|
|
ret = drm_fb_helper_init(dev, &ifbdev->helper);
|
|
if (ret) {
|
|
kfree(ifbdev);
|
|
return ret;
|
|
}
|
|
|
|
dev_priv->fbdev = ifbdev;
|
|
INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
|
|
{
|
|
struct intel_fbdev *ifbdev = data;
|
|
|
|
/* Due to peculiar init order wrt to hpd handling this is separate. */
|
|
if (drm_fb_helper_initial_config(&ifbdev->helper,
|
|
ifbdev->preferred_bpp))
|
|
intel_fbdev_unregister(to_i915(ifbdev->helper.dev));
|
|
}
|
|
|
|
void intel_fbdev_initial_config_async(struct drm_device *dev)
|
|
{
|
|
struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
|
|
|
|
if (!ifbdev)
|
|
return;
|
|
|
|
ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev);
|
|
}
|
|
|
|
static void intel_fbdev_sync(struct intel_fbdev *ifbdev)
|
|
{
|
|
if (!ifbdev->cookie)
|
|
return;
|
|
|
|
/* Only serialises with all preceding async calls, hence +1 */
|
|
async_synchronize_cookie(ifbdev->cookie + 1);
|
|
ifbdev->cookie = 0;
|
|
}
|
|
|
|
void intel_fbdev_unregister(struct drm_i915_private *dev_priv)
|
|
{
|
|
struct intel_fbdev *ifbdev = dev_priv->fbdev;
|
|
|
|
if (!ifbdev)
|
|
return;
|
|
|
|
cancel_work_sync(&dev_priv->fbdev_suspend_work);
|
|
if (!current_is_async())
|
|
intel_fbdev_sync(ifbdev);
|
|
|
|
drm_fb_helper_unregister_fbi(&ifbdev->helper);
|
|
}
|
|
|
|
void intel_fbdev_fini(struct drm_i915_private *dev_priv)
|
|
{
|
|
struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->fbdev);
|
|
|
|
if (!ifbdev)
|
|
return;
|
|
|
|
intel_fbdev_destroy(ifbdev);
|
|
}
|
|
|
|
/* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD
|
|
* processing, fbdev will perform a full connector reprobe if a hotplug event
|
|
* was received while HPD was suspended.
|
|
*/
|
|
static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state)
|
|
{
|
|
struct intel_fbdev *ifbdev = i915->fbdev;
|
|
bool send_hpd = false;
|
|
|
|
mutex_lock(&ifbdev->hpd_lock);
|
|
ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED;
|
|
send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting;
|
|
ifbdev->hpd_waiting = false;
|
|
mutex_unlock(&ifbdev->hpd_lock);
|
|
|
|
if (send_hpd) {
|
|
drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n");
|
|
drm_fb_helper_hotplug_event(&ifbdev->helper);
|
|
}
|
|
}
|
|
|
|
void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
|
|
{
|
|
struct drm_i915_private *dev_priv = to_i915(dev);
|
|
struct intel_fbdev *ifbdev = dev_priv->fbdev;
|
|
struct fb_info *info;
|
|
|
|
if (!ifbdev || !ifbdev->vma)
|
|
return;
|
|
|
|
info = ifbdev->helper.fbdev;
|
|
|
|
if (synchronous) {
|
|
/* Flush any pending work to turn the console on, and then
|
|
* wait to turn it off. It must be synchronous as we are
|
|
* about to suspend or unload the driver.
|
|
*
|
|
* Note that from within the work-handler, we cannot flush
|
|
* ourselves, so only flush outstanding work upon suspend!
|
|
*/
|
|
if (state != FBINFO_STATE_RUNNING)
|
|
flush_work(&dev_priv->fbdev_suspend_work);
|
|
|
|
console_lock();
|
|
} else {
|
|
/*
|
|
* The console lock can be pretty contented on resume due
|
|
* to all the printk activity. Try to keep it out of the hot
|
|
* path of resume if possible.
|
|
*/
|
|
drm_WARN_ON(dev, state != FBINFO_STATE_RUNNING);
|
|
if (!console_trylock()) {
|
|
/* Don't block our own workqueue as this can
|
|
* be run in parallel with other i915.ko tasks.
|
|
*/
|
|
schedule_work(&dev_priv->fbdev_suspend_work);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* On resume from hibernation: If the object is shmemfs backed, it has
|
|
* been restored from swap. If the object is stolen however, it will be
|
|
* full of whatever garbage was left in there.
|
|
*/
|
|
if (state == FBINFO_STATE_RUNNING &&
|
|
!i915_gem_object_is_shmem(intel_fb_obj(&ifbdev->fb->base)))
|
|
memset_io(info->screen_base, 0, info->screen_size);
|
|
|
|
drm_fb_helper_set_suspend(&ifbdev->helper, state);
|
|
console_unlock();
|
|
|
|
intel_fbdev_hpd_set_suspend(dev_priv, state);
|
|
}
|
|
|
|
void intel_fbdev_output_poll_changed(struct drm_device *dev)
|
|
{
|
|
struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
|
|
bool send_hpd;
|
|
|
|
if (!ifbdev)
|
|
return;
|
|
|
|
intel_fbdev_sync(ifbdev);
|
|
|
|
mutex_lock(&ifbdev->hpd_lock);
|
|
send_hpd = !ifbdev->hpd_suspended;
|
|
ifbdev->hpd_waiting = true;
|
|
mutex_unlock(&ifbdev->hpd_lock);
|
|
|
|
if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup))
|
|
drm_fb_helper_hotplug_event(&ifbdev->helper);
|
|
}
|
|
|
|
void intel_fbdev_restore_mode(struct drm_device *dev)
|
|
{
|
|
struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
|
|
|
|
if (!ifbdev)
|
|
return;
|
|
|
|
intel_fbdev_sync(ifbdev);
|
|
if (!ifbdev->vma)
|
|
return;
|
|
|
|
if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0)
|
|
intel_fbdev_invalidate(ifbdev);
|
|
}
|