drm/vmwgfx: Remove ttm object hashtable

[ Upstream commit 931e09d8d5b4aa19bdae0234f2727049f1cd13d9 ]

The object_hash hashtable for ttm objects is not being used.
Remove it and perform refactoring in ttm_object init function.

Signed-off-by: Maaz Mombasawala <mombasawalam@vmware.com>
Reviewed-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: Martin Krastev <krastevm@vmware.com>
Signed-off-by: Zack Rusin <zackr@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221022040236.616490-5-zack@kde.org
Stable-dep-of: a309c7194e8a ("drm/vmwgfx: Remove rcu locks from user resources")
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/vmwgfx/ttm_object.c b/drivers/gpu/drm/vmwgfx/ttm_object.c
index 26a55fef1ab50f26384a06c3f82224c39624e5c4..9546b121bc2215ece34492a03f790818d96bc3ee 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/ttm_object.c
+++ b/drivers/gpu/drm/vmwgfx/ttm_object.c
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
 /**************************************************************************
  *
- * Copyright (c) 2009-2013 VMware, Inc., Palo Alto, CA., USA
+ * Copyright (c) 2009-2022 VMware, Inc., Palo Alto, CA., USA
  * All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -44,13 +44,14 @@
 
 #define pr_fmt(fmt) "[TTM] " fmt
 
+#include "ttm_object.h"
+#include "vmwgfx_drv.h"
+
 #include <linux/list.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
 #include <linux/atomic.h>
 #include <linux/module.h>
-#include "ttm_object.h"
-#include "vmwgfx_drv.h"
 
 MODULE_IMPORT_NS(DMA_BUF);
 
@@ -81,9 +82,7 @@ struct ttm_object_file {
 /*
  * struct ttm_object_device
  *
- * @object_lock: lock that protects the object_hash hash table.
- *
- * @object_hash: hash table for fast lookup of object global names.
+ * @object_lock: lock that protects idr.
  *
  * @object_count: Per device object count.
  *
@@ -92,7 +91,6 @@ struct ttm_object_file {
 
 struct ttm_object_device {
        spinlock_t object_lock;
-       struct vmwgfx_open_hash object_hash;
        atomic_t object_count;
        struct dma_buf_ops ops;
        void (*dmabuf_release)(struct dma_buf *dma_buf);
@@ -449,20 +447,15 @@ out_err:
 }
 
 struct ttm_object_device *
-ttm_object_device_init(unsigned int hash_order,
-                      const struct dma_buf_ops *ops)
+ttm_object_device_init(const struct dma_buf_ops *ops)
 {
        struct ttm_object_device *tdev = kmalloc(sizeof(*tdev), GFP_KERNEL);
-       int ret;
 
        if (unlikely(tdev == NULL))
                return NULL;
 
        spin_lock_init(&tdev->object_lock);
        atomic_set(&tdev->object_count, 0);
-       ret = vmwgfx_ht_create(&tdev->object_hash, hash_order);
-       if (ret != 0)
-               goto out_no_object_hash;
 
        /*
         * Our base is at VMWGFX_NUM_MOB + 1 because we want to create
@@ -477,10 +470,6 @@ ttm_object_device_init(unsigned int hash_order,
        tdev->dmabuf_release = tdev->ops.release;
        tdev->ops.release = ttm_prime_dmabuf_release;
        return tdev;
-
-out_no_object_hash:
-       kfree(tdev);
-       return NULL;
 }
 
 void ttm_object_device_release(struct ttm_object_device **p_tdev)
@@ -491,7 +480,6 @@ void ttm_object_device_release(struct ttm_object_device **p_tdev)
 
        WARN_ON_ONCE(!idr_is_empty(&tdev->idr));
        idr_destroy(&tdev->idr);
-       vmwgfx_ht_remove(&tdev->object_hash);
 
        kfree(tdev);
 }

diff --git a/drivers/gpu/drm/vmwgfx/ttm_object.h b/drivers/gpu/drm/vmwgfx/ttm_object.h
index 1a2fa0f83f5f910779398b3cfefd93bb6f2bfcda..6870f951b677cb4338eb479b3ad3bf05144f99f6 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/ttm_object.h
+++ b/drivers/gpu/drm/vmwgfx/ttm_object.h
@@ -1,6 +1,6 @@
 /**************************************************************************
  *
- * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
+ * Copyright (c) 2006-2022 VMware, Inc., Palo Alto, CA., USA
  * All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -262,7 +262,6 @@ extern void ttm_object_file_release(struct ttm_object_file **p_tfile);
 /**
  * ttm_object device init - initialize a struct ttm_object_device
  *
- * @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
@@ -270,8 +269,7 @@ extern void ttm_object_file_release(struct ttm_object_file **p_tfile);
  */
 
 extern struct ttm_object_device *
-ttm_object_device_init(unsigned int hash_order,
-                      const struct dma_buf_ops *ops);
+ttm_object_device_init(const struct dma_buf_ops *ops);
 
 /**
  * ttm_object_device_release - release data held by a ttm_object_device

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 45028e25d490e1bff0f916865d9c461dc5358a30..13b90273eb776db0bc11e44abd991830d7712290 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -994,7 +994,7 @@ static int vmw_driver_load(struct vmw_private *dev_priv, u32 pci_id)
                goto out_err0;
        }
 
-       dev_priv->tdev = ttm_object_device_init(12, &vmw_prime_dmabuf_ops);
+       dev_priv->tdev = ttm_object_device_init(&vmw_prime_dmabuf_ops);
 
        if (unlikely(dev_priv->tdev == NULL)) {
                drm_err(&dev_priv->drm,