From 244b2c5ca8b14627e4a17755e5922221e121c771 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 09 Oct 2024 06:15:07 +0000
Subject: [PATCH] change system file
---
kernel/drivers/gpu/drm/drm_file.c | 594 ++++++++++++++++++++++++++++++++++++++++++-----------------
1 files changed, 423 insertions(+), 171 deletions(-)
diff --git a/kernel/drivers/gpu/drm/drm_file.c b/kernel/drivers/gpu/drm/drm_file.c
index b884194..0167030 100644
--- a/kernel/drivers/gpu/drm/drm_file.c
+++ b/kernel/drivers/gpu/drm/drm_file.c
@@ -31,22 +31,61 @@
* OTHER DEALINGS IN THE SOFTWARE.
*/
+#include <linux/anon_inodes.h>
+#include <linux/dma-fence.h>
+#include <linux/file.h>
+#include <linux/module.h>
+#include <linux/pci.h>
#include <linux/poll.h>
#include <linux/slab.h>
-#include <linux/module.h>
#include <drm/drm_client.h>
+#include <drm/drm_drv.h>
#include <drm/drm_file.h>
-#include <drm/drmP.h>
+#include <drm/drm_print.h>
-#include "drm_legacy.h"
-#include "drm_internal.h"
#include "drm_crtc_internal.h"
+#include "drm_internal.h"
+#include "drm_legacy.h"
+
+#if defined(CONFIG_MMU) && defined(CONFIG_TRANSPARENT_HUGEPAGE)
+#include <uapi/asm/mman.h>
+#include <drm/drm_vma_manager.h>
+#endif
/* from BKL pushdown */
DEFINE_MUTEX(drm_global_mutex);
-#define MAX_DRM_OPEN_COUNT 128
+bool drm_dev_needs_global_mutex(struct drm_device *dev)
+{
+ /*
+ * Legacy drivers rely on all kinds of BKL locking semantics, don't
+ * bother. They also still need BKL locking for their ioctls, so better
+ * safe than sorry.
+ */
+ if (drm_core_check_feature(dev, DRIVER_LEGACY))
+ return true;
+
+ /*
+ * The deprecated ->load callback must be called after the driver is
+ * already registered. This means such drivers rely on the BKL to make
+ * sure an open can't proceed until the driver is actually fully set up.
+ * Similar hilarity holds for the unload callback.
+ */
+ if (dev->driver->load || dev->driver->unload)
+ return true;
+
+ /*
+ * Drivers with the lastclose callback assume that it's synchronized
+ * against concurrent opens, which again needs the BKL. The proper fix
+ * is to use the drm_client infrastructure with proper locking for each
+ * client.
+ */
+ if (dev->driver->lastclose)
+ return true;
+
+ return false;
+}
/**
* DOC: file operations
@@ -102,8 +141,6 @@
* :ref:`IOCTL support in the userland interfaces chapter<drm_driver_ioctl>`.
*/
-static int drm_open_helper(struct file *filp, struct drm_minor *minor);
-
/**
* drm_file_alloc - allocate file context
* @minor: minor to allocate on
@@ -130,7 +167,6 @@
/* for compatibility root is always authenticated */
file->authenticated = capable(CAP_SYS_ADMIN);
- file->lock_count = 0;
INIT_LIST_HEAD(&file->lhead);
INIT_LIST_HEAD(&file->fbs);
@@ -149,8 +185,7 @@
if (drm_core_check_feature(dev, DRIVER_SYNCOBJ))
drm_syncobj_open(file);
- if (drm_core_check_feature(dev, DRIVER_PRIME))
- drm_prime_init_file_private(&file->prime);
+ drm_prime_init_file_private(&file->prime);
if (dev->driver->open) {
ret = dev->driver->open(dev, file);
@@ -161,8 +196,7 @@
return file;
out_prime_destroy:
- if (drm_core_check_feature(dev, DRIVER_PRIME))
- drm_prime_destroy_file_private(&file->prime);
+ drm_prime_destroy_file_private(&file->prime);
if (drm_core_check_feature(dev, DRIVER_SYNCOBJ))
drm_syncobj_release(file);
if (drm_core_check_feature(dev, DRIVER_GEM))
@@ -219,10 +253,10 @@
dev = file->minor->dev;
- DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
- task_pid_nr(current),
+ DRM_DEBUG("comm=\"%s\", pid=%d, dev=0x%lx, open_count=%d\n",
+ current->comm, task_pid_nr(current),
(long)old_encode_dev(file->minor->kdev->devt),
- dev->open_count);
+ atomic_read(&dev->open_count));
if (drm_core_check_feature(dev, DRIVER_LEGACY) &&
dev->driver->preclose)
@@ -255,8 +289,7 @@
if (dev->driver->postclose)
dev->driver->postclose(dev, file);
- if (drm_core_check_feature(dev, DRIVER_PRIME))
- drm_prime_destroy_file_private(&file->prime);
+ drm_prime_destroy_file_private(&file->prime);
WARN_ON(!list_empty(&file->event_list));
@@ -276,23 +309,87 @@
drm_file_free(file_priv);
}
-static int drm_setup(struct drm_device * dev)
+/*
+ * Check whether DRI will run on this CPU.
+ *
+ * \return non-zero if the DRI will run on this CPU, or zero otherwise.
+ */
+static int drm_cpu_valid(void)
{
+#if defined(__sparc__) && !defined(__sparc_v9__)
+ return 0; /* No cmpxchg before v9 sparc. */
+#endif
+ return 1;
+}
+
+/*
+ * Called whenever a process opens a drm node
+ *
+ * \param filp file pointer.
+ * \param minor acquired minor-object.
+ * \return zero on success or a negative number on failure.
+ *
+ * Creates and initializes a drm_file structure for the file private data in \p
+ * filp and add it into the double linked list in \p dev.
+ */
+static int drm_open_helper(struct file *filp, struct drm_minor *minor)
+{
+ struct drm_device *dev = minor->dev;
+ struct drm_file *priv;
int ret;
- if (dev->driver->firstopen &&
- drm_core_check_feature(dev, DRIVER_LEGACY)) {
- ret = dev->driver->firstopen(dev);
- if (ret != 0)
+ if (filp->f_flags & O_EXCL)
+ return -EBUSY; /* No exclusive opens */
+ if (!drm_cpu_valid())
+ return -EINVAL;
+ if (dev->switch_power_state != DRM_SWITCH_POWER_ON &&
+ dev->switch_power_state != DRM_SWITCH_POWER_DYNAMIC_OFF)
+ return -EINVAL;
+
+ DRM_DEBUG("comm=\"%s\", pid=%d, minor=%d\n", current->comm,
+ task_pid_nr(current), minor->index);
+
+ priv = drm_file_alloc(minor);
+ if (IS_ERR(priv))
+ return PTR_ERR(priv);
+
+ if (drm_is_primary_client(priv)) {
+ ret = drm_master_open(priv);
+ if (ret) {
+ drm_file_free(priv);
return ret;
+ }
}
- ret = drm_legacy_dma_setup(dev);
- if (ret < 0)
- return ret;
+ filp->private_data = priv;
+ filp->f_mode |= FMODE_UNSIGNED_OFFSET;
+ priv->filp = filp;
+ mutex_lock(&dev->filelist_mutex);
+ list_add(&priv->lhead, &dev->filelist);
+ mutex_unlock(&dev->filelist_mutex);
- DRM_DEBUG("\n");
+#ifdef __alpha__
+ /*
+ * Default the hose
+ */
+ if (!dev->hose) {
+ struct pci_dev *pci_dev;
+
+ pci_dev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL);
+ if (pci_dev) {
+ dev->hose = pci_dev->sysdata;
+ pci_dev_put(pci_dev);
+ }
+ if (!dev->hose) {
+ struct pci_bus *b = list_entry(pci_root_buses.next,
+ struct pci_bus, node);
+ if (b)
+ dev->hose = b->sysdata;
+ }
+ }
+#endif
+
return 0;
}
@@ -321,13 +418,11 @@
return PTR_ERR(minor);
dev = minor->dev;
- if (!dev->open_count++)
- need_setup = 1;
+ if (drm_dev_needs_global_mutex(dev))
+ mutex_lock(&drm_global_mutex);
- if (dev->open_count >= MAX_DRM_OPEN_COUNT) {
- retcode = -EPERM;
- goto err_undo;
- }
+ if (!atomic_fetch_inc(&dev->open_count))
+ need_setup = 1;
/* share address_space across all char-devs of a single device */
filp->f_mapping = dev->anon_inode->i_mapping;
@@ -336,125 +431,26 @@
if (retcode)
goto err_undo;
if (need_setup) {
- retcode = drm_setup(dev);
+ retcode = drm_legacy_setup(dev);
if (retcode) {
drm_close_helper(filp);
goto err_undo;
}
}
+
+ if (drm_dev_needs_global_mutex(dev))
+ mutex_unlock(&drm_global_mutex);
+
return 0;
err_undo:
- dev->open_count--;
+ atomic_dec(&dev->open_count);
+ if (drm_dev_needs_global_mutex(dev))
+ mutex_unlock(&drm_global_mutex);
drm_minor_release(minor);
return retcode;
}
EXPORT_SYMBOL(drm_open);
-
-/*
- * Check whether DRI will run on this CPU.
- *
- * \return non-zero if the DRI will run on this CPU, or zero otherwise.
- */
-static int drm_cpu_valid(void)
-{
-#if defined(__sparc__) && !defined(__sparc_v9__)
- return 0; /* No cmpxchg before v9 sparc. */
-#endif
- return 1;
-}
-
-/*
- * Called whenever a process opens /dev/drm.
- *
- * \param filp file pointer.
- * \param minor acquired minor-object.
- * \return zero on success or a negative number on failure.
- *
- * Creates and initializes a drm_file structure for the file private data in \p
- * filp and add it into the double linked list in \p dev.
- */
-static int drm_open_helper(struct file *filp, struct drm_minor *minor)
-{
- struct drm_device *dev = minor->dev;
- struct drm_file *priv;
- int ret;
-
- if (filp->f_flags & O_EXCL)
- return -EBUSY; /* No exclusive opens */
- if (!drm_cpu_valid())
- return -EINVAL;
- if (dev->switch_power_state != DRM_SWITCH_POWER_ON && dev->switch_power_state != DRM_SWITCH_POWER_DYNAMIC_OFF)
- return -EINVAL;
-
- DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor->index);
-
- priv = drm_file_alloc(minor);
- if (IS_ERR(priv))
- return PTR_ERR(priv);
-
- if (drm_is_primary_client(priv)) {
- ret = drm_master_open(priv);
- if (ret) {
- drm_file_free(priv);
- return ret;
- }
- }
-
- filp->private_data = priv;
- filp->f_mode |= FMODE_UNSIGNED_OFFSET;
- priv->filp = filp;
-
- mutex_lock(&dev->filelist_mutex);
- list_add(&priv->lhead, &dev->filelist);
- mutex_unlock(&dev->filelist_mutex);
-
-#ifdef __alpha__
- /*
- * Default the hose
- */
- if (!dev->hose) {
- struct pci_dev *pci_dev;
- pci_dev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL);
- if (pci_dev) {
- dev->hose = pci_dev->sysdata;
- pci_dev_put(pci_dev);
- }
- if (!dev->hose) {
- struct pci_bus *b = list_entry(pci_root_buses.next,
- struct pci_bus, node);
- if (b)
- dev->hose = b->sysdata;
- }
- }
-#endif
-
- return 0;
-}
-
-static void drm_legacy_dev_reinit(struct drm_device *dev)
-{
- if (dev->irq_enabled)
- drm_irq_uninstall(dev);
-
- mutex_lock(&dev->struct_mutex);
-
- drm_legacy_agp_clear(dev);
-
- drm_legacy_sg_cleanup(dev);
- drm_legacy_vma_flush(dev);
- drm_legacy_dma_takedown(dev);
-
- mutex_unlock(&dev->struct_mutex);
-
- dev->sigdata.lock = NULL;
-
- dev->context_flag = 0;
- dev->last_context = 0;
- dev->if_version = 0;
-
- DRM_DEBUG("lastclose completed\n");
-}
void drm_lastclose(struct drm_device * dev)
{
@@ -490,22 +486,58 @@
struct drm_minor *minor = file_priv->minor;
struct drm_device *dev = minor->dev;
- mutex_lock(&drm_global_mutex);
+ if (drm_dev_needs_global_mutex(dev))
+ mutex_lock(&drm_global_mutex);
- DRM_DEBUG("open_count = %d\n", dev->open_count);
+ DRM_DEBUG("open_count = %d\n", atomic_read(&dev->open_count));
drm_close_helper(filp);
- if (!--dev->open_count)
+ if (atomic_dec_and_test(&dev->open_count))
drm_lastclose(dev);
- mutex_unlock(&drm_global_mutex);
+ if (drm_dev_needs_global_mutex(dev))
+ mutex_unlock(&drm_global_mutex);
drm_minor_release(minor);
return 0;
}
EXPORT_SYMBOL(drm_release);
+
+/**
+ * drm_release_noglobal - release method for DRM file
+ * @inode: device inode
+ * @filp: file pointer.
+ *
+ * This function may be used by drivers as their &file_operations.release
+ * method. It frees any resources associated with the open file prior to taking
+ * the drm_global_mutex, which then calls the &drm_driver.postclose driver
+ * callback. If this is the last open file for the DRM device also proceeds to
+ * call the &drm_driver.lastclose driver callback.
+ *
+ * RETURNS:
+ *
+ * Always succeeds and returns 0.
+ */
+int drm_release_noglobal(struct inode *inode, struct file *filp)
+{
+ struct drm_file *file_priv = filp->private_data;
+ struct drm_minor *minor = file_priv->minor;
+ struct drm_device *dev = minor->dev;
+
+ drm_close_helper(filp);
+
+ if (atomic_dec_and_mutex_lock(&dev->open_count, &drm_global_mutex)) {
+ drm_lastclose(dev);
+ mutex_unlock(&drm_global_mutex);
+ }
+
+ drm_minor_release(minor);
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_release_noglobal);
/**
* drm_read - read method for DRM file
@@ -539,9 +571,6 @@
struct drm_file *file_priv = filp->private_data;
struct drm_device *dev = file_priv->minor->dev;
ssize_t ret;
-
- if (!access_ok(VERIFY_WRITE, buffer, count))
- return -EFAULT;
ret = mutex_lock_interruptible(&file_priv->event_read_lock);
if (ret)
@@ -584,7 +613,8 @@
file_priv->event_space -= length;
list_add(&e->link, &file_priv->event_list);
spin_unlock_irq(&dev->event_lock);
- wake_up_interruptible(&file_priv->event_wait);
+ wake_up_interruptible_poll(&file_priv->event_wait,
+ EPOLLIN | EPOLLRDNORM);
break;
}
@@ -717,7 +747,7 @@
EXPORT_SYMBOL(drm_event_reserve_init);
/**
- * drm_event_cancel_free - free a DRM event and release it's space
+ * drm_event_cancel_free - free a DRM event and release its space
* @dev: DRM device
* @p: tracking structure for the pending event
*
@@ -729,6 +759,7 @@
struct drm_pending_event *p)
{
unsigned long flags;
+
spin_lock_irqsave(&dev->event_lock, flags);
if (p->file_priv) {
p->file_priv->event_space += p->event->length;
@@ -742,6 +773,72 @@
kfree(p);
}
EXPORT_SYMBOL(drm_event_cancel_free);
+
+/**
+ * drm_send_event_helper - send DRM event to file descriptor
+ * @dev: DRM device
+ * @e: DRM event to deliver
+ * @timestamp: timestamp to set for the fence event in kernel's CLOCK_MONOTONIC
+ * time domain
+ *
+ * This helper function sends the event @e, initialized with
+ * drm_event_reserve_init(), to its associated userspace DRM file.
+ * The timestamp variant of dma_fence_signal is used when the caller
+ * sends a valid timestamp.
+ */
+void drm_send_event_helper(struct drm_device *dev,
+ struct drm_pending_event *e, ktime_t timestamp)
+{
+ assert_spin_locked(&dev->event_lock);
+
+ if (e->completion) {
+ complete_all(e->completion);
+ e->completion_release(e->completion);
+ e->completion = NULL;
+ }
+
+ if (e->fence) {
+ if (timestamp)
+ dma_fence_signal_timestamp(e->fence, timestamp);
+ else
+ dma_fence_signal(e->fence);
+ dma_fence_put(e->fence);
+ }
+
+ if (!e->file_priv) {
+ kfree(e);
+ return;
+ }
+
+ list_del(&e->pending_link);
+ list_add_tail(&e->link,
+ &e->file_priv->event_list);
+ wake_up_interruptible_poll(&e->file_priv->event_wait,
+ EPOLLIN | EPOLLRDNORM);
+}
+
+/**
+ * drm_send_event_timestamp_locked - send DRM event to file descriptor
+ * @dev: DRM device
+ * @e: DRM event to deliver
+ * @timestamp: timestamp to set for the fence event in kernel's CLOCK_MONOTONIC
+ * time domain
+ *
+ * This function sends the event @e, initialized with drm_event_reserve_init(),
+ * to its associated userspace DRM file. Callers must already hold
+ * &drm_device.event_lock.
+ *
+ * Note that the core will take care of unlinking and disarming events when the
+ * corresponding DRM file is closed. Drivers need not worry about whether the
+ * DRM file for this event still exists and can call this function upon
+ * completion of the asynchronous work unconditionally.
+ */
+void drm_send_event_timestamp_locked(struct drm_device *dev,
+ struct drm_pending_event *e, ktime_t timestamp)
+{
+ drm_send_event_helper(dev, e, timestamp);
+}
+EXPORT_SYMBOL(drm_send_event_timestamp_locked);
/**
* drm_send_event_locked - send DRM event to file descriptor
@@ -759,28 +856,7 @@
*/
void drm_send_event_locked(struct drm_device *dev, struct drm_pending_event *e)
{
- assert_spin_locked(&dev->event_lock);
-
- if (e->completion) {
- complete_all(e->completion);
- e->completion_release(e->completion);
- e->completion = NULL;
- }
-
- if (e->fence) {
- dma_fence_signal(e->fence);
- dma_fence_put(e->fence);
- }
-
- if (!e->file_priv) {
- kfree(e);
- return;
- }
-
- list_del(&e->pending_link);
- list_add_tail(&e->link,
- &e->file_priv->event_list);
- wake_up_interruptible(&e->file_priv->event_wait);
+ drm_send_event_helper(dev, e, 0);
}
EXPORT_SYMBOL(drm_send_event_locked);
@@ -804,7 +880,183 @@
unsigned long irqflags;
spin_lock_irqsave(&dev->event_lock, irqflags);
- drm_send_event_locked(dev, e);
+ drm_send_event_helper(dev, e, 0);
spin_unlock_irqrestore(&dev->event_lock, irqflags);
}
EXPORT_SYMBOL(drm_send_event);
+
+/**
+ * mock_drm_getfile - Create a new struct file for the drm device
+ * @minor: drm minor to wrap (e.g. #drm_device.primary)
+ * @flags: file creation mode (O_RDWR etc)
+ *
+ * This create a new struct file that wraps a DRM file context around a
+ * DRM minor. This mimicks userspace opening e.g. /dev/dri/card0, but without
+ * invoking userspace. The struct file may be operated on using its f_op
+ * (the drm_device.driver.fops) to mimick userspace operations, or be supplied
+ * to userspace facing functions as an internal/anonymous client.
+ *
+ * RETURNS:
+ * Pointer to newly created struct file, ERR_PTR on failure.
+ */
+struct file *mock_drm_getfile(struct drm_minor *minor, unsigned int flags)
+{
+ struct drm_device *dev = minor->dev;
+ struct drm_file *priv;
+ struct file *file;
+
+ priv = drm_file_alloc(minor);
+ if (IS_ERR(priv))
+ return ERR_CAST(priv);
+
+ file = anon_inode_getfile("drm", dev->driver->fops, priv, flags);
+ if (IS_ERR(file)) {
+ drm_file_free(priv);
+ return file;
+ }
+
+ /* Everyone shares a single global address space */
+ file->f_mapping = dev->anon_inode->i_mapping;
+
+ drm_dev_get(dev);
+ priv->filp = file;
+
+ return file;
+}
+EXPORT_SYMBOL_FOR_TESTS_ONLY(mock_drm_getfile);
+
+#ifdef CONFIG_MMU
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+/*
+ * drm_addr_inflate() attempts to construct an aligned area by inflating
+ * the area size and skipping the unaligned start of the area.
+ * adapted from shmem_get_unmapped_area()
+ */
+static unsigned long drm_addr_inflate(unsigned long addr,
+ unsigned long len,
+ unsigned long pgoff,
+ unsigned long flags,
+ unsigned long huge_size)
+{
+ unsigned long offset, inflated_len;
+ unsigned long inflated_addr;
+ unsigned long inflated_offset;
+
+ offset = (pgoff << PAGE_SHIFT) & (huge_size - 1);
+ if (offset && offset + len < 2 * huge_size)
+ return addr;
+ if ((addr & (huge_size - 1)) == offset)
+ return addr;
+
+ inflated_len = len + huge_size - PAGE_SIZE;
+ if (inflated_len > TASK_SIZE)
+ return addr;
+ if (inflated_len < len)
+ return addr;
+
+ inflated_addr = current->mm->get_unmapped_area(NULL, 0, inflated_len,
+ 0, flags);
+ if (IS_ERR_VALUE(inflated_addr))
+ return addr;
+ if (inflated_addr & ~PAGE_MASK)
+ return addr;
+
+ inflated_offset = inflated_addr & (huge_size - 1);
+ inflated_addr += offset - inflated_offset;
+ if (inflated_offset > offset)
+ inflated_addr += huge_size;
+
+ if (inflated_addr > TASK_SIZE - len)
+ return addr;
+
+ return inflated_addr;
+}
+
+/**
+ * drm_get_unmapped_area() - Get an unused user-space virtual memory area
+ * suitable for huge page table entries.
+ * @file: The struct file representing the address space being mmap()'d.
+ * @uaddr: Start address suggested by user-space.
+ * @len: Length of the area.
+ * @pgoff: The page offset into the address space.
+ * @flags: mmap flags
+ * @mgr: The address space manager used by the drm driver. This argument can
+ * probably be removed at some point when all drivers use the same
+ * address space manager.
+ *
+ * This function attempts to find an unused user-space virtual memory area
+ * that can accommodate the size we want to map, and that is properly
+ * aligned to facilitate huge page table entries matching actual
+ * huge pages or huge page aligned memory in buffer objects. Buffer objects
+ * are assumed to start at huge page boundary pfns (io memory) or be
+ * populated by huge pages aligned to the start of the buffer object
+ * (system- or coherent memory). Adapted from shmem_get_unmapped_area.
+ *
+ * Return: aligned user-space address.
+ */
+unsigned long drm_get_unmapped_area(struct file *file,
+ unsigned long uaddr, unsigned long len,
+ unsigned long pgoff, unsigned long flags,
+ struct drm_vma_offset_manager *mgr)
+{
+ unsigned long addr;
+ unsigned long inflated_addr;
+ struct drm_vma_offset_node *node;
+
+ if (len > TASK_SIZE)
+ return -ENOMEM;
+
+ /*
+ * @pgoff is the file page-offset the huge page boundaries of
+ * which typically aligns to physical address huge page boundaries.
+ * That's not true for DRM, however, where physical address huge
+ * page boundaries instead are aligned with the offset from
+ * buffer object start. So adjust @pgoff to be the offset from
+ * buffer object start.
+ */
+ drm_vma_offset_lock_lookup(mgr);
+ node = drm_vma_offset_lookup_locked(mgr, pgoff, 1);
+ if (node)
+ pgoff -= node->vm_node.start;
+ drm_vma_offset_unlock_lookup(mgr);
+
+ addr = current->mm->get_unmapped_area(file, uaddr, len, pgoff, flags);
+ if (IS_ERR_VALUE(addr))
+ return addr;
+ if (addr & ~PAGE_MASK)
+ return addr;
+ if (addr > TASK_SIZE - len)
+ return addr;
+
+ if (len < HPAGE_PMD_SIZE)
+ return addr;
+ if (flags & MAP_FIXED)
+ return addr;
+ /*
+ * Our priority is to support MAP_SHARED mapped hugely;
+ * and support MAP_PRIVATE mapped hugely too, until it is COWed.
+ * But if caller specified an address hint, respect that as before.
+ */
+ if (uaddr)
+ return addr;
+
+ inflated_addr = drm_addr_inflate(addr, len, pgoff, flags,
+ HPAGE_PMD_SIZE);
+
+ if (IS_ENABLED(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD) &&
+ len >= HPAGE_PUD_SIZE)
+ inflated_addr = drm_addr_inflate(inflated_addr, len, pgoff,
+ flags, HPAGE_PUD_SIZE);
+ return inflated_addr;
+}
+#else /* CONFIG_TRANSPARENT_HUGEPAGE */
+unsigned long drm_get_unmapped_area(struct file *file,
+ unsigned long uaddr, unsigned long len,
+ unsigned long pgoff, unsigned long flags,
+ struct drm_vma_offset_manager *mgr)
+{
+ return current->mm->get_unmapped_area(file, uaddr, len, pgoff, flags);
+}
+#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+EXPORT_SYMBOL_GPL(drm_get_unmapped_area);
+#endif /* CONFIG_MMU */
--
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