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authorDave Airlie <airlied@redhat.com>2018-10-04 10:19:33 +1000
committerDave Airlie <airlied@redhat.com>2018-10-04 10:19:33 +1000
commitd04a836ea76c49db8c5547612d9c9cbb97f0402d (patch)
tree7874b1968e5abc3d164efb29d8993932cf14f509 /include/drm
parent87c2ee740c07f1edae9eec8bc45cb9b32a68f323 (diff)
parente8c66efbfe3a2e3cbc573f2474a3d51690f1b857 (diff)
downloadlinux-d04a836ea76c49db8c5547612d9c9cbb97f0402d.tar.bz2
Merge branch 'vmwgfx-next' of git://people.freedesktop.org/~thomash/linux into drm-next
Mostly code reorganizations and optimizations for vmwgfx. - Move TTM code that's only used by vmwgfx to vmwgfx - Break out the vmwgfx buffer- and resource validation code to a separate source file - Get rid of a number of atomic operations during command buffer validation. From: Thomas Hellstrom <thellstrom@vmware.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180928131157.2810-1-thellstrom@vmware.com
Diffstat (limited to 'include/drm')
-rw-r--r--include/drm/ttm/ttm_bo_api.h18
-rw-r--r--include/drm/ttm/ttm_lock.h248
-rw-r--r--include/drm/ttm/ttm_object.h354
3 files changed, 18 insertions, 602 deletions
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index 8c19470785e2..3fc4854dce49 100644
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -313,6 +313,24 @@ ttm_bo_reference(struct ttm_buffer_object *bo)
}
/**
+ * ttm_bo_get_unless_zero - reference a struct ttm_buffer_object unless
+ * its refcount has already reached zero.
+ * @bo: The buffer object.
+ *
+ * Used to reference a TTM buffer object in lookups where the object is removed
+ * from the lookup structure during the destructor and for RCU lookups.
+ *
+ * Returns: @bo if the referencing was successful, NULL otherwise.
+ */
+static inline __must_check struct ttm_buffer_object *
+ttm_bo_get_unless_zero(struct ttm_buffer_object *bo)
+{
+ if (!kref_get_unless_zero(&bo->kref))
+ return NULL;
+ return bo;
+}
+
+/**
* ttm_bo_wait - wait for buffer idle.
*
* @bo: The buffer object.
diff --git a/include/drm/ttm/ttm_lock.h b/include/drm/ttm/ttm_lock.h
deleted file mode 100644
index 0c3af9836863..000000000000
--- a/include/drm/ttm/ttm_lock.h
+++ /dev/null
@@ -1,248 +0,0 @@
-/**************************************************************************
- *
- * Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sub license, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
- * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
- * USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- **************************************************************************/
-/*
- * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
- */
-
-/** @file ttm_lock.h
- * This file implements a simple replacement for the buffer manager use
- * of the DRM heavyweight hardware lock.
- * The lock is a read-write lock. Taking it in read mode and write mode
- * is relatively fast, and intended for in-kernel use only.
- *
- * The vt mode is used only when there is a need to block all
- * user-space processes from validating buffers.
- * It's allowed to leave kernel space with the vt lock held.
- * If a user-space process dies while having the vt-lock,
- * it will be released during the file descriptor release. The vt lock
- * excludes write lock and read lock.
- *
- * The suspend mode is used to lock out all TTM users when preparing for
- * and executing suspend operations.
- *
- */
-
-#ifndef _TTM_LOCK_H_
-#define _TTM_LOCK_H_
-
-#include <linux/wait.h>
-#include <linux/atomic.h>
-
-#include "ttm_object.h"
-
-/**
- * struct ttm_lock
- *
- * @base: ttm base object used solely to release the lock if the client
- * holding the lock dies.
- * @queue: Queue for processes waiting for lock change-of-status.
- * @lock: Spinlock protecting some lock members.
- * @rw: Read-write lock counter. Protected by @lock.
- * @flags: Lock state. Protected by @lock.
- * @kill_takers: Boolean whether to kill takers of the lock.
- * @signal: Signal to send when kill_takers is true.
- */
-
-struct ttm_lock {
- struct ttm_base_object base;
- wait_queue_head_t queue;
- spinlock_t lock;
- int32_t rw;
- uint32_t flags;
- bool kill_takers;
- int signal;
- struct ttm_object_file *vt_holder;
-};
-
-
-/**
- * ttm_lock_init
- *
- * @lock: Pointer to a struct ttm_lock
- * Initializes the lock.
- */
-extern void ttm_lock_init(struct ttm_lock *lock);
-
-/**
- * ttm_read_unlock
- *
- * @lock: Pointer to a struct ttm_lock
- *
- * Releases a read lock.
- */
-extern void ttm_read_unlock(struct ttm_lock *lock);
-
-/**
- * ttm_read_lock
- *
- * @lock: Pointer to a struct ttm_lock
- * @interruptible: Interruptible sleeping while waiting for a lock.
- *
- * Takes the lock in read mode.
- * Returns:
- * -ERESTARTSYS If interrupted by a signal and interruptible is true.
- */
-extern int ttm_read_lock(struct ttm_lock *lock, bool interruptible);
-
-/**
- * ttm_read_trylock
- *
- * @lock: Pointer to a struct ttm_lock
- * @interruptible: Interruptible sleeping while waiting for a lock.
- *
- * Tries to take the lock in read mode. If the lock is already held
- * in write mode, the function will return -EBUSY. If the lock is held
- * in vt or suspend mode, the function will sleep until these modes
- * are unlocked.
- *
- * Returns:
- * -EBUSY The lock was already held in write mode.
- * -ERESTARTSYS If interrupted by a signal and interruptible is true.
- */
-extern int ttm_read_trylock(struct ttm_lock *lock, bool interruptible);
-
-/**
- * ttm_write_unlock
- *
- * @lock: Pointer to a struct ttm_lock
- *
- * Releases a write lock.
- */
-extern void ttm_write_unlock(struct ttm_lock *lock);
-
-/**
- * ttm_write_lock
- *
- * @lock: Pointer to a struct ttm_lock
- * @interruptible: Interruptible sleeping while waiting for a lock.
- *
- * Takes the lock in write mode.
- * Returns:
- * -ERESTARTSYS If interrupted by a signal and interruptible is true.
- */
-extern int ttm_write_lock(struct ttm_lock *lock, bool interruptible);
-
-/**
- * ttm_lock_downgrade
- *
- * @lock: Pointer to a struct ttm_lock
- *
- * Downgrades a write lock to a read lock.
- */
-extern void ttm_lock_downgrade(struct ttm_lock *lock);
-
-/**
- * ttm_suspend_lock
- *
- * @lock: Pointer to a struct ttm_lock
- *
- * Takes the lock in suspend mode. Excludes read and write mode.
- */
-extern void ttm_suspend_lock(struct ttm_lock *lock);
-
-/**
- * ttm_suspend_unlock
- *
- * @lock: Pointer to a struct ttm_lock
- *
- * Releases a suspend lock
- */
-extern void ttm_suspend_unlock(struct ttm_lock *lock);
-
-/**
- * ttm_vt_lock
- *
- * @lock: Pointer to a struct ttm_lock
- * @interruptible: Interruptible sleeping while waiting for a lock.
- * @tfile: Pointer to a struct ttm_object_file to register the lock with.
- *
- * Takes the lock in vt mode.
- * Returns:
- * -ERESTARTSYS If interrupted by a signal and interruptible is true.
- * -ENOMEM: Out of memory when locking.
- */
-extern int ttm_vt_lock(struct ttm_lock *lock, bool interruptible,
- struct ttm_object_file *tfile);
-
-/**
- * ttm_vt_unlock
- *
- * @lock: Pointer to a struct ttm_lock
- *
- * Releases a vt lock.
- * Returns:
- * -EINVAL If the lock was not held.
- */
-extern int ttm_vt_unlock(struct ttm_lock *lock);
-
-/**
- * ttm_write_unlock
- *
- * @lock: Pointer to a struct ttm_lock
- *
- * Releases a write lock.
- */
-extern void ttm_write_unlock(struct ttm_lock *lock);
-
-/**
- * ttm_write_lock
- *
- * @lock: Pointer to a struct ttm_lock
- * @interruptible: Interruptible sleeping while waiting for a lock.
- *
- * Takes the lock in write mode.
- * Returns:
- * -ERESTARTSYS If interrupted by a signal and interruptible is true.
- */
-extern int ttm_write_lock(struct ttm_lock *lock, bool interruptible);
-
-/**
- * ttm_lock_set_kill
- *
- * @lock: Pointer to a struct ttm_lock
- * @val: Boolean whether to kill processes taking the lock.
- * @signal: Signal to send to the process taking the lock.
- *
- * The kill-when-taking-lock functionality is used to kill processes that keep
- * on using the TTM functionality when its resources has been taken down, for
- * example when the X server exits. A typical sequence would look like this:
- * - X server takes lock in write mode.
- * - ttm_lock_set_kill() is called with @val set to true.
- * - As part of X server exit, TTM resources are taken down.
- * - X server releases the lock on file release.
- * - Another dri client wants to render, takes the lock and is killed.
- *
- */
-static inline void ttm_lock_set_kill(struct ttm_lock *lock, bool val,
- int signal)
-{
- lock->kill_takers = val;
- if (val)
- lock->signal = signal;
-}
-
-#endif
diff --git a/include/drm/ttm/ttm_object.h b/include/drm/ttm/ttm_object.h
deleted file mode 100644
index a98bfeb4239e..000000000000
--- a/include/drm/ttm/ttm_object.h
+++ /dev/null
@@ -1,354 +0,0 @@
-/**************************************************************************
- *
- * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sub license, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
- * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
- * USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- **************************************************************************/
-/*
- * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
- */
-/** @file ttm_object.h
- *
- * Base- and reference object implementation for the various
- * ttm objects. Implements reference counting, minimal security checks
- * and release on file close.
- */
-
-#ifndef _TTM_OBJECT_H_
-#define _TTM_OBJECT_H_
-
-#include <linux/list.h>
-#include <drm/drm_hashtab.h>
-#include <linux/kref.h>
-#include <linux/rcupdate.h>
-#include <linux/dma-buf.h>
-
-#include "ttm_memory.h"
-
-/**
- * enum ttm_ref_type
- *
- * Describes what type of reference a ref object holds.
- *
- * TTM_REF_USAGE is a simple refcount on a base object.
- *
- * TTM_REF_SYNCCPU_READ is a SYNCCPU_READ reference on a
- * buffer object.
- *
- * TTM_REF_SYNCCPU_WRITE is a SYNCCPU_WRITE reference on a
- * buffer object.
- *
- */
-
-enum ttm_ref_type {
- TTM_REF_USAGE,
- TTM_REF_SYNCCPU_READ,
- TTM_REF_SYNCCPU_WRITE,
- TTM_REF_NUM
-};
-
-/**
- * enum ttm_object_type
- *
- * One entry per ttm object type.
- * Device-specific types should use the
- * ttm_driver_typex types.
- */
-
-enum ttm_object_type {
- ttm_fence_type,
- ttm_buffer_type,
- ttm_lock_type,
- ttm_prime_type,
- ttm_driver_type0 = 256,
- ttm_driver_type1,
- ttm_driver_type2,
- ttm_driver_type3,
- ttm_driver_type4,
- ttm_driver_type5
-};
-
-struct ttm_object_file;
-struct ttm_object_device;
-
-/**
- * struct ttm_base_object
- *
- * @hash: hash entry for the per-device object hash.
- * @type: derived type this object is base class for.
- * @shareable: Other ttm_object_files can access this object.
- *
- * @tfile: Pointer to ttm_object_file of the creator.
- * NULL if the object was not created by a user request.
- * (kernel object).
- *
- * @refcount: Number of references to this object, not
- * including the hash entry. A reference to a base object can
- * only be held by a ref object.
- *
- * @refcount_release: A function to be called when there are
- * no more references to this object. This function should
- * destroy the object (or make sure destruction eventually happens),
- * and when it is called, the object has
- * already been taken out of the per-device hash. The parameter
- * "base" should be set to NULL by the function.
- *
- * @ref_obj_release: A function to be called when a reference object
- * with another ttm_ref_type than TTM_REF_USAGE is deleted.
- * This function may, for example, release a lock held by a user-space
- * process.
- *
- * This struct is intended to be used as a base struct for objects that
- * are visible to user-space. It provides a global name, race-safe
- * access and refcounting, minimal access contol and hooks for unref actions.
- */
-
-struct ttm_base_object {
- struct rcu_head rhead;
- struct drm_hash_item hash;
- enum ttm_object_type object_type;
- bool shareable;
- struct ttm_object_file *tfile;
- struct kref refcount;
- void (*refcount_release) (struct ttm_base_object **base);
- void (*ref_obj_release) (struct ttm_base_object *base,
- enum ttm_ref_type ref_type);
-};
-
-
-/**
- * struct ttm_prime_object - Modified base object that is prime-aware
- *
- * @base: struct ttm_base_object that we derive from
- * @mutex: Mutex protecting the @dma_buf member.
- * @size: Size of the dma_buf associated with this object
- * @real_type: Type of the underlying object. Needed since we're setting
- * the value of @base::object_type to ttm_prime_type
- * @dma_buf: Non ref-coutned pointer to a struct dma_buf created from this
- * object.
- * @refcount_release: The underlying object's release method. Needed since
- * we set @base::refcount_release to our own release method.
- */
-
-struct ttm_prime_object {
- struct ttm_base_object base;
- struct mutex mutex;
- size_t size;
- enum ttm_object_type real_type;
- struct dma_buf *dma_buf;
- void (*refcount_release) (struct ttm_base_object **);
-};
-
-/**
- * ttm_base_object_init
- *
- * @tfile: Pointer to a struct ttm_object_file.
- * @base: The struct ttm_base_object to initialize.
- * @shareable: This object is shareable with other applcations.
- * (different @tfile pointers.)
- * @type: The object type.
- * @refcount_release: See the struct ttm_base_object description.
- * @ref_obj_release: See the struct ttm_base_object description.
- *
- * Initializes a struct ttm_base_object.
- */
-
-extern int ttm_base_object_init(struct ttm_object_file *tfile,
- struct ttm_base_object *base,
- bool shareable,
- enum ttm_object_type type,
- void (*refcount_release) (struct ttm_base_object
- **),
- void (*ref_obj_release) (struct ttm_base_object
- *,
- enum ttm_ref_type
- ref_type));
-
-/**
- * ttm_base_object_lookup
- *
- * @tfile: Pointer to a struct ttm_object_file.
- * @key: Hash key
- *
- * Looks up a struct ttm_base_object with the key @key.
- */
-
-extern struct ttm_base_object *ttm_base_object_lookup(struct ttm_object_file
- *tfile, uint32_t key);
-
-/**
- * ttm_base_object_lookup_for_ref
- *
- * @tdev: Pointer to a struct ttm_object_device.
- * @key: Hash key
- *
- * Looks up a struct ttm_base_object with the key @key.
- * This function should only be used when the struct tfile associated with the
- * caller doesn't yet have a reference to the base object.
- */
-
-extern struct ttm_base_object *
-ttm_base_object_lookup_for_ref(struct ttm_object_device *tdev, uint32_t key);
-
-/**
- * ttm_base_object_unref
- *
- * @p_base: Pointer to a pointer referencing a struct ttm_base_object.
- *
- * Decrements the base object refcount and clears the pointer pointed to by
- * p_base.
- */
-
-extern void ttm_base_object_unref(struct ttm_base_object **p_base);
-
-/**
- * ttm_ref_object_add.
- *
- * @tfile: A struct ttm_object_file representing the application owning the
- * ref_object.
- * @base: The base object to reference.
- * @ref_type: The type of reference.
- * @existed: Upon completion, indicates that an identical reference object
- * already existed, and the refcount was upped on that object instead.
- * @require_existed: Fail with -EPERM if an identical ref object didn't
- * already exist.
- *
- * Checks that the base object is shareable and adds a ref object to it.
- *
- * Adding a ref object to a base object is basically like referencing the
- * base object, but a user-space application holds the reference. When the
- * file corresponding to @tfile is closed, all its reference objects are
- * deleted. A reference object can have different types depending on what
- * it's intended for. It can be refcounting to prevent object destruction,
- * When user-space takes a lock, it can add a ref object to that lock to
- * make sure the lock is released if the application dies. A ref object
- * will hold a single reference on a base object.
- */
-extern int ttm_ref_object_add(struct ttm_object_file *tfile,
- struct ttm_base_object *base,
- enum ttm_ref_type ref_type, bool *existed,
- bool require_existed);
-
-extern bool ttm_ref_object_exists(struct ttm_object_file *tfile,
- struct ttm_base_object *base);
-
-/**
- * ttm_ref_object_base_unref
- *
- * @key: Key representing the base object.
- * @ref_type: Ref type of the ref object to be dereferenced.
- *
- * Unreference a ref object with type @ref_type
- * on the base object identified by @key. If there are no duplicate
- * references, the ref object will be destroyed and the base object
- * will be unreferenced.
- */
-extern int ttm_ref_object_base_unref(struct ttm_object_file *tfile,
- unsigned long key,
- enum ttm_ref_type ref_type);
-
-/**
- * ttm_object_file_init - initialize a struct ttm_object file
- *
- * @tdev: A struct ttm_object device this file is initialized on.
- * @hash_order: Order of the hash table used to hold the reference objects.
- *
- * This is typically called by the file_ops::open function.
- */
-
-extern struct ttm_object_file *ttm_object_file_init(struct ttm_object_device
- *tdev,
- unsigned int hash_order);
-
-/**
- * ttm_object_file_release - release data held by a ttm_object_file
- *
- * @p_tfile: Pointer to pointer to the ttm_object_file object to release.
- * *p_tfile will be set to NULL by this function.
- *
- * Releases all data associated by a ttm_object_file.
- * Typically called from file_ops::release. The caller must
- * ensure that there are no concurrent users of tfile.
- */
-
-extern void ttm_object_file_release(struct ttm_object_file **p_tfile);
-
-/**
- * ttm_object device init - initialize a struct ttm_object_device
- *
- * @mem_glob: struct ttm_mem_global for memory accounting.
- * @hash_order: Order of hash table used to hash the base objects.
- * @ops: DMA buf ops for prime objects of this device.
- *
- * This function is typically called on device initialization to prepare
- * data structures needed for ttm base and ref objects.
- */
-
-extern struct ttm_object_device *
-ttm_object_device_init(struct ttm_mem_global *mem_glob,
- unsigned int hash_order,
- const struct dma_buf_ops *ops);
-
-/**
- * ttm_object_device_release - release data held by a ttm_object_device
- *
- * @p_tdev: Pointer to pointer to the ttm_object_device object to release.
- * *p_tdev will be set to NULL by this function.
- *
- * Releases all data associated by a ttm_object_device.
- * Typically called from driver::unload before the destruction of the
- * device private data structure.
- */
-
-extern void ttm_object_device_release(struct ttm_object_device **p_tdev);
-
-#define ttm_base_object_kfree(__object, __base)\
- kfree_rcu(__object, __base.rhead)
-
-extern int ttm_prime_object_init(struct ttm_object_file *tfile,
- size_t size,
- struct ttm_prime_object *prime,
- bool shareable,
- enum ttm_object_type type,
- void (*refcount_release)
- (struct ttm_base_object **),
- void (*ref_obj_release)
- (struct ttm_base_object *,
- enum ttm_ref_type ref_type));
-
-static inline enum ttm_object_type
-ttm_base_object_type(struct ttm_base_object *base)
-{
- return (base->object_type == ttm_prime_type) ?
- container_of(base, struct ttm_prime_object, base)->real_type :
- base->object_type;
-}
-extern int ttm_prime_fd_to_handle(struct ttm_object_file *tfile,
- int fd, u32 *handle);
-extern int ttm_prime_handle_to_fd(struct ttm_object_file *tfile,
- uint32_t handle, uint32_t flags,
- int *prime_fd);
-
-#define ttm_prime_object_kfree(__obj, __prime) \
- kfree_rcu(__obj, __prime.base.rhead)
-#endif