https://github.com/torvalds/linux
Revision e058a84bfddc42ba356a2316f2cf1141974625c9 authored by Linus Torvalds on 01 July 2021, 19:53:43 UTC, committed by Linus Torvalds on 01 July 2021, 19:53:43 UTC
Pull drm updates from Dave Airlie: "Highlights: - AMD enables two more GPUs, with resulting header files - i915 has started to move to TTM for discrete GPU and enable DG1 discrete GPU support (not by default yet) - new HyperV drm driver - vmwgfx adds arm64 support - TTM refactoring ongoing - 16bpc display support for AMD hw Otherwise it's just the usual insane amounts of work all over the place in lots of drivers and the core, as mostly summarised below: Core: - mark AGP ioctls as legacy - disable force probing for non-master clients - HDR metadata property helpers - HDMI infoframe signal colorimetry support - remove drm_device.pdev pointer - remove DRM_KMS_FB_HELPER config option - remove drm_pci_alloc/free - drm_err_*/drm_dbg_* helpers - use drm driver names for fbdev - leaked DMA handle fix - 16bpc fixed point format fourcc - add prefetching memcpy for WC - Documentation fixes aperture: - add aperture ownership helpers dp: - aux fixes - downstream 0 port handling - use extended base receiver capability DPCD - Rename DP_PSR_SELECTIVE_UPDATE to better mach eDP spec - mst: use khz as link rate during init - VCPI fixes for StarTech hub ttm: - provide tt_shrink file via debugfs - warn about freeing pinned BOs - fix swapping error handling - move page alignment into BO - cleanup ttm_agp_backend - add ttm_sys_manager - don't override vm_ops - ttm_bo_mmap removed - make ttm_resource base of all managers - remove VM_MIXEDMAP usage panel: - sysfs_emit support - simple: runtime PM support - simple: power up panel when reading EDID + caching bridge: - MHDP8546: HDCP support + DT bindings - MHDP8546: Register DP AUX channel with userspace - TI SN65DSI83 + SN65DSI84: add driver - Sil8620: Fix module dependencies - dw-hdmi: make CEC driver loading optional - Ti-sn65dsi86: refclk fixes, subdrivers, runtime pm - It66121: Add driver + DT bindings - Adv7511: Support I2S IEC958 encoding - Anx7625: fix power-on delay - Nwi-dsi: Modesetting fixes; Cleanups - lt6911: add missing MODULE_DEVICE_TABLE - cdns: fix PM reference leak hyperv: - add new DRM driver for HyperV graphics efifb: - non-PCI device handling fixes i915: - refactor IP/device versioning - XeLPD Display IP preperation work - ADL-P enablement patches - DG1 uAPI behind BROKEN - disable mmap ioctl for discerte GPUs - start enabling HuC loading for Gen12+ - major GuC backend rework for new platforms - initial TTM support for Discrete GPUs - locking rework for TTM prep - use correct max source link rate for eDP - %p4cc format printing - GLK display fixes - VLV DSI panel power fixes - PSR2 disabled for RKL and ADL-S - ACPI _DSM invalid access fixed - DMC FW path abstraction - ADL-S PCI ID update - uAPI headers converted to kerneldoc - initial LMEM support for DG1 - x86/gpu: add Jasperlake to gen11 early quirks amdgpu: - Aldebaran updates + initial SR-IOV - new GPU: Beige Goby and Yellow Carp support - more LTTPR display work - Vangogh updates - SDMA 5.x GCR fixes - PCIe ASPM support - Renoir TMZ enablement - initial multiple eDP panel support - use fdinfo to track devices/process info - pin/unpin TTM fixes - free resource on fence usage query - fix fence calculation - fix hotunplug/suspend issues - GC/MM register access macro cleanup for SR-IOV - W=1 fixes - ACPI ATCS/ATIF handling rework - 16bpc fixed point format support - Initial smartshift support - RV/PCO power tuning fixes - new INFO query for additional vbios info amdkfd: - SR-IOV aldebaran support - HMM SVM support radeon: - SMU regression fixes - Oland flickering fix vmwgfx: - enable console with fbdev emulation - fix cpu updates of coherent multisample surfaces - remove reservation semaphore - add initial SVGA3 support - support arm64 msm: - devcoredump support for display errors - dpu/dsi: yaml bindings conversion - mdp5: alpha/blend_mode/zpos support - a6xx: cached coherent buffer support - gpu iova fault improvement - a660 support rockchip: - RK3036 win1 scaling support - RK3066/3188 missing register support - RK3036/3066/3126/3188 alpha support mediatek: - MT8167 HDMI support - MT8183 DPI dual edge support tegra: - fixed YUV support/scaling on Tegra186+ ast: - use pcim_iomap - fix DP501 EDID bochs: - screen blanking support etnaviv: - export more GPU ID values to userspace - add HWDB entry for GPU on i.MX8MP - rework linear window calcs exynos: - pm runtime changes imx: - Annotate dma_fence critical section - fix PRG modifiers after drmm conversion - Add 8 pixel alignment fix for 1366x768 - fix YUV advertising - add color properties ingenic: - IPU planes fix panfrost: - Mediatek MT8183 support + DT bindings - export AFBC_FEATURES register to userspace simpledrm: - %pr for printing resources nouveau: - pin/unpin TTM fixes qxl: - unpin shadow BO virtio: - create dumb BOs as guest blob vkms: - drmm_universal_plane_alloc - add XRGB plane composition - overlay support" * tag 'drm-next-2021-07-01' of git://anongit.freedesktop.org/drm/drm: (1570 commits) drm/i915: Reinstate the mmap ioctl for some platforms drm/i915/dsc: abstract helpers to get bigjoiner primary/secondary crtc Revert "drm/msm/mdp5: provide dynamic bandwidth management" drm/msm/mdp5: provide dynamic bandwidth management drm/msm/mdp5: add perf blocks for holding fudge factors drm/msm/mdp5: switch to standard zpos property drm/msm/mdp5: add support for alpha/blend_mode properties drm/msm/mdp5: use drm_plane_state for pixel blend mode drm/msm/mdp5: use drm_plane_state for storing alpha value drm/msm/mdp5: use drm atomic helpers to handle base drm plane state drm/msm/dsi: do not enable PHYs when called for the slave DSI interface drm/msm: Add debugfs to trigger shrinker drm/msm/dpu: Avoid ABBA deadlock between IRQ modules drm/msm: devcoredump iommu fault support iommu/arm-smmu-qcom: Add stall support drm/msm: Improve the a6xx page fault handler iommu/arm-smmu-qcom: Add an adreno-smmu-priv callback to get pagefault info iommu/arm-smmu: Add support for driver IOMMU fault handlers drm/msm: export hangcheck_period in debugfs drm/msm/a6xx: add support for Adreno 660 GPU ...
Tip revision: e058a84bfddc42ba356a2316f2cf1141974625c9 authored by Linus Torvalds on 01 July 2021, 19:53:43 UTC
Merge tag 'drm-next-2021-07-01' of git://anongit.freedesktop.org/drm/drm
Merge tag 'drm-next-2021-07-01' of git://anongit.freedesktop.org/drm/drm
Tip revision: e058a84
anon_inodes.c
// SPDX-License-Identifier: GPL-2.0-only
/*
* fs/anon_inodes.c
*
* Copyright (C) 2007 Davide Libenzi <davidel@xmailserver.org>
*
* Thanks to Arnd Bergmann for code review and suggestions.
* More changes for Thomas Gleixner suggestions.
*
*/
#include <linux/cred.h>
#include <linux/file.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/magic.h>
#include <linux/anon_inodes.h>
#include <linux/pseudo_fs.h>
#include <linux/uaccess.h>
static struct vfsmount *anon_inode_mnt __read_mostly;
static struct inode *anon_inode_inode;
/*
* anon_inodefs_dname() is called from d_path().
*/
static char *anon_inodefs_dname(struct dentry *dentry, char *buffer, int buflen)
{
return dynamic_dname(dentry, buffer, buflen, "anon_inode:%s",
dentry->d_name.name);
}
static const struct dentry_operations anon_inodefs_dentry_operations = {
.d_dname = anon_inodefs_dname,
};
static int anon_inodefs_init_fs_context(struct fs_context *fc)
{
struct pseudo_fs_context *ctx = init_pseudo(fc, ANON_INODE_FS_MAGIC);
if (!ctx)
return -ENOMEM;
ctx->dops = &anon_inodefs_dentry_operations;
return 0;
}
static struct file_system_type anon_inode_fs_type = {
.name = "anon_inodefs",
.init_fs_context = anon_inodefs_init_fs_context,
.kill_sb = kill_anon_super,
};
static struct inode *anon_inode_make_secure_inode(
const char *name,
const struct inode *context_inode)
{
struct inode *inode;
const struct qstr qname = QSTR_INIT(name, strlen(name));
int error;
inode = alloc_anon_inode(anon_inode_mnt->mnt_sb);
if (IS_ERR(inode))
return inode;
inode->i_flags &= ~S_PRIVATE;
error = security_inode_init_security_anon(inode, &qname, context_inode);
if (error) {
iput(inode);
return ERR_PTR(error);
}
return inode;
}
static struct file *__anon_inode_getfile(const char *name,
const struct file_operations *fops,
void *priv, int flags,
const struct inode *context_inode,
bool secure)
{
struct inode *inode;
struct file *file;
if (fops->owner && !try_module_get(fops->owner))
return ERR_PTR(-ENOENT);
if (secure) {
inode = anon_inode_make_secure_inode(name, context_inode);
if (IS_ERR(inode)) {
file = ERR_CAST(inode);
goto err;
}
} else {
inode = anon_inode_inode;
if (IS_ERR(inode)) {
file = ERR_PTR(-ENODEV);
goto err;
}
/*
* We know the anon_inode inode count is always
* greater than zero, so ihold() is safe.
*/
ihold(inode);
}
file = alloc_file_pseudo(inode, anon_inode_mnt, name,
flags & (O_ACCMODE | O_NONBLOCK), fops);
if (IS_ERR(file))
goto err_iput;
file->f_mapping = inode->i_mapping;
file->private_data = priv;
return file;
err_iput:
iput(inode);
err:
module_put(fops->owner);
return file;
}
/**
* anon_inode_getfile - creates a new file instance by hooking it up to an
* anonymous inode, and a dentry that describe the "class"
* of the file
*
* @name: [in] name of the "class" of the new file
* @fops: [in] file operations for the new file
* @priv: [in] private data for the new file (will be file's private_data)
* @flags: [in] flags
*
* Creates a new file by hooking it on a single inode. This is useful for files
* that do not need to have a full-fledged inode in order to operate correctly.
* All the files created with anon_inode_getfile() will share a single inode,
* hence saving memory and avoiding code duplication for the file/inode/dentry
* setup. Returns the newly created file* or an error pointer.
*/
struct file *anon_inode_getfile(const char *name,
const struct file_operations *fops,
void *priv, int flags)
{
return __anon_inode_getfile(name, fops, priv, flags, NULL, false);
}
EXPORT_SYMBOL_GPL(anon_inode_getfile);
static int __anon_inode_getfd(const char *name,
const struct file_operations *fops,
void *priv, int flags,
const struct inode *context_inode,
bool secure)
{
int error, fd;
struct file *file;
error = get_unused_fd_flags(flags);
if (error < 0)
return error;
fd = error;
file = __anon_inode_getfile(name, fops, priv, flags, context_inode,
secure);
if (IS_ERR(file)) {
error = PTR_ERR(file);
goto err_put_unused_fd;
}
fd_install(fd, file);
return fd;
err_put_unused_fd:
put_unused_fd(fd);
return error;
}
/**
* anon_inode_getfd - creates a new file instance by hooking it up to
* an anonymous inode and a dentry that describe
* the "class" of the file
*
* @name: [in] name of the "class" of the new file
* @fops: [in] file operations for the new file
* @priv: [in] private data for the new file (will be file's private_data)
* @flags: [in] flags
*
* Creates a new file by hooking it on a single inode. This is
* useful for files that do not need to have a full-fledged inode in
* order to operate correctly. All the files created with
* anon_inode_getfd() will use the same singleton inode, reducing
* memory use and avoiding code duplication for the file/inode/dentry
* setup. Returns a newly created file descriptor or an error code.
*/
int anon_inode_getfd(const char *name, const struct file_operations *fops,
void *priv, int flags)
{
return __anon_inode_getfd(name, fops, priv, flags, NULL, false);
}
EXPORT_SYMBOL_GPL(anon_inode_getfd);
/**
* anon_inode_getfd_secure - Like anon_inode_getfd(), but creates a new
* !S_PRIVATE anon inode rather than reuse the singleton anon inode, and calls
* the inode_init_security_anon() LSM hook. This allows the inode to have its
* own security context and for a LSM to reject creation of the inode.
*
* @name: [in] name of the "class" of the new file
* @fops: [in] file operations for the new file
* @priv: [in] private data for the new file (will be file's private_data)
* @flags: [in] flags
* @context_inode:
* [in] the logical relationship with the new inode (optional)
*
* The LSM may use @context_inode in inode_init_security_anon(), but a
* reference to it is not held.
*/
int anon_inode_getfd_secure(const char *name, const struct file_operations *fops,
void *priv, int flags,
const struct inode *context_inode)
{
return __anon_inode_getfd(name, fops, priv, flags, context_inode, true);
}
EXPORT_SYMBOL_GPL(anon_inode_getfd_secure);
static int __init anon_inode_init(void)
{
anon_inode_mnt = kern_mount(&anon_inode_fs_type);
if (IS_ERR(anon_inode_mnt))
panic("anon_inode_init() kernel mount failed (%ld)\n", PTR_ERR(anon_inode_mnt));
anon_inode_inode = alloc_anon_inode(anon_inode_mnt->mnt_sb);
if (IS_ERR(anon_inode_inode))
panic("anon_inode_init() inode allocation failed (%ld)\n", PTR_ERR(anon_inode_inode));
return 0;
}
fs_initcall(anon_inode_init);
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