[PATCH v3 05/17] drm/vmwgfx: Refactor resource validation hashtable to use linux/hashtable implementation.
Zack Rusin
zack at kde.org
Fri Oct 21 03:43:48 UTC 2022
From: Maaz Mombasawala <mombasawalam at vmware.com>
Vmwgfx's hashtab implementation needs to be replaced with linux/hashtable
to reduce maintenence burden.
As part of this effort, refactor the res_ht hashtable used for resource
validation during execbuf execution to use linux/hashtable implementation.
This also refactors vmw_validation_context to use vmw_sw_context as the
container for the hashtable, whereas before it used a vmwgfx_open_hash
directly. This makes vmw_validation_context less generic, but there is
no functional change since res_ht is the only instance where validation
context used a hashtable in vmwgfx driver.
Signed-off-by: Maaz Mombasawala <mombasawalam at vmware.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom at linux.intel.com>
Signed-off-by: Zack Rusin <zackr at vmware.com>
---
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 24 ++++++++--
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 5 +-
drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c | 14 ++----
drivers/gpu/drm/vmwgfx/vmwgfx_validation.c | 55 +++++++++++-----------
drivers/gpu/drm/vmwgfx/vmwgfx_validation.h | 26 +++-------
5 files changed, 58 insertions(+), 66 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 13b90273eb77..8d77e79bd904 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -830,6 +830,22 @@ static void vmw_write_driver_id(struct vmw_private *dev)
}
}
+static void vmw_sw_context_init(struct vmw_private *dev_priv)
+{
+ struct vmw_sw_context *sw_context = &dev_priv->ctx;
+
+ hash_init(sw_context->res_ht);
+}
+
+static void vmw_sw_context_fini(struct vmw_private *dev_priv)
+{
+ struct vmw_sw_context *sw_context = &dev_priv->ctx;
+
+ vfree(sw_context->cmd_bounce);
+ if (sw_context->staged_bindings)
+ vmw_binding_state_free(sw_context->staged_bindings);
+}
+
static int vmw_driver_load(struct vmw_private *dev_priv, u32 pci_id)
{
int ret;
@@ -839,6 +855,8 @@ static int vmw_driver_load(struct vmw_private *dev_priv, u32 pci_id)
dev_priv->drm.dev_private = dev_priv;
+ vmw_sw_context_init(dev_priv);
+
mutex_init(&dev_priv->cmdbuf_mutex);
mutex_init(&dev_priv->binding_mutex);
spin_lock_init(&dev_priv->resource_lock);
@@ -1168,9 +1186,7 @@ static void vmw_driver_unload(struct drm_device *dev)
unregister_pm_notifier(&dev_priv->pm_nb);
- if (dev_priv->ctx.res_ht_initialized)
- vmwgfx_ht_remove(&dev_priv->ctx.res_ht);
- vfree(dev_priv->ctx.cmd_bounce);
+ vmw_sw_context_fini(dev_priv);
if (dev_priv->enable_fb) {
vmw_fb_off(dev_priv);
vmw_fb_close(dev_priv);
@@ -1198,8 +1214,6 @@ static void vmw_driver_unload(struct drm_device *dev)
vmw_irq_uninstall(&dev_priv->drm);
ttm_object_device_release(&dev_priv->tdev);
- if (dev_priv->ctx.staged_bindings)
- vmw_binding_state_free(dev_priv->ctx.staged_bindings);
for (i = vmw_res_context; i < vmw_res_max; ++i)
idr_destroy(&dev_priv->res_idr[i]);
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
index 09e2d738aa87..d87aeedb78d0 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
@@ -30,6 +30,7 @@
#include <linux/suspend.h>
#include <linux/sync_file.h>
+#include <linux/hashtable.h>
#include <drm/drm_auth.h>
#include <drm/drm_device.h>
@@ -93,6 +94,7 @@
#define VMW_RES_STREAM ttm_driver_type2
#define VMW_RES_FENCE ttm_driver_type3
#define VMW_RES_SHADER ttm_driver_type4
+#define VMW_RES_HT_ORDER 12
#define MKSSTAT_CAPACITY_LOG2 5U
#define MKSSTAT_CAPACITY (1U << MKSSTAT_CAPACITY_LOG2)
@@ -425,8 +427,7 @@ struct vmw_ctx_validation_info;
* @ctx: The validation context
*/
struct vmw_sw_context{
- struct vmwgfx_open_hash res_ht;
- bool res_ht_initialized;
+ DECLARE_HASHTABLE(res_ht, VMW_RES_HT_ORDER);
bool kernel;
struct vmw_fpriv *fp;
struct drm_file *filp;
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
index f085dbd4736d..c943ab801ca7 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0 OR MIT
/**************************************************************************
*
- * Copyright 2009 - 2015 VMware, Inc., Palo Alto, CA., USA
+ * Copyright 2009 - 2022 VMware, Inc., Palo Alto, CA., USA
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
@@ -25,6 +25,7 @@
*
**************************************************************************/
#include <linux/sync_file.h>
+#include <linux/hashtable.h>
#include "vmwgfx_drv.h"
#include "vmwgfx_reg.h"
@@ -34,7 +35,6 @@
#include "vmwgfx_binding.h"
#include "vmwgfx_mksstat.h"
-#define VMW_RES_HT_ORDER 12
/*
* Helper macro to get dx_ctx_node if available otherwise print an error
@@ -4101,7 +4101,7 @@ int vmw_execbuf_process(struct drm_file *file_priv,
int ret;
int32_t out_fence_fd = -1;
struct sync_file *sync_file = NULL;
- DECLARE_VAL_CONTEXT(val_ctx, &sw_context->res_ht, 1);
+ DECLARE_VAL_CONTEXT(val_ctx, sw_context, 1);
if (flags & DRM_VMW_EXECBUF_FLAG_EXPORT_FENCE_FD) {
out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
@@ -4164,14 +4164,6 @@ int vmw_execbuf_process(struct drm_file *file_priv,
if (sw_context->staged_bindings)
vmw_binding_state_reset(sw_context->staged_bindings);
- if (!sw_context->res_ht_initialized) {
- ret = vmwgfx_ht_create(&sw_context->res_ht, VMW_RES_HT_ORDER);
- if (unlikely(ret != 0))
- goto out_unlock;
-
- sw_context->res_ht_initialized = true;
- }
-
INIT_LIST_HEAD(&sw_context->staged_cmd_res);
sw_context->ctx = &val_ctx;
ret = vmw_execbuf_tie_context(dev_priv, sw_context, dx_context_handle);
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_validation.c b/drivers/gpu/drm/vmwgfx/vmwgfx_validation.c
index f46891012be3..f5c4a40fb16d 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_validation.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_validation.c
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0 OR MIT
/**************************************************************************
*
- * Copyright © 2018 VMware, Inc., Palo Alto, CA., USA
+ * Copyright © 2018 - 2022 VMware, Inc., Palo Alto, CA., USA
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
@@ -180,11 +180,16 @@ vmw_validation_find_bo_dup(struct vmw_validation_context *ctx,
if (!ctx->merge_dups)
return NULL;
- if (ctx->ht) {
+ if (ctx->sw_context) {
struct vmwgfx_hash_item *hash;
+ unsigned long key = (unsigned long) vbo;
- if (!vmwgfx_ht_find_item(ctx->ht, (unsigned long) vbo, &hash))
- bo_node = container_of(hash, typeof(*bo_node), hash);
+ hash_for_each_possible_rcu(ctx->sw_context->res_ht, hash, head, key) {
+ if (hash->key == key) {
+ bo_node = container_of(hash, typeof(*bo_node), hash);
+ break;
+ }
+ }
} else {
struct vmw_validation_bo_node *entry;
@@ -217,11 +222,16 @@ vmw_validation_find_res_dup(struct vmw_validation_context *ctx,
if (!ctx->merge_dups)
return NULL;
- if (ctx->ht) {
+ if (ctx->sw_context) {
struct vmwgfx_hash_item *hash;
+ unsigned long key = (unsigned long) res;
- if (!vmwgfx_ht_find_item(ctx->ht, (unsigned long) res, &hash))
- res_node = container_of(hash, typeof(*res_node), hash);
+ hash_for_each_possible_rcu(ctx->sw_context->res_ht, hash, head, key) {
+ if (hash->key == key) {
+ res_node = container_of(hash, typeof(*res_node), hash);
+ break;
+ }
+ }
} else {
struct vmw_validation_res_node *entry;
@@ -269,20 +279,15 @@ int vmw_validation_add_bo(struct vmw_validation_context *ctx,
}
} else {
struct ttm_validate_buffer *val_buf;
- int ret;
bo_node = vmw_validation_mem_alloc(ctx, sizeof(*bo_node));
if (!bo_node)
return -ENOMEM;
- if (ctx->ht) {
+ if (ctx->sw_context) {
bo_node->hash.key = (unsigned long) vbo;
- ret = vmwgfx_ht_insert_item(ctx->ht, &bo_node->hash);
- if (ret) {
- DRM_ERROR("Failed to initialize a buffer "
- "validation entry.\n");
- return ret;
- }
+ hash_add_rcu(ctx->sw_context->res_ht, &bo_node->hash.head,
+ bo_node->hash.key);
}
val_buf = &bo_node->base;
val_buf->bo = ttm_bo_get_unless_zero(&vbo->base);
@@ -316,7 +321,6 @@ int vmw_validation_add_resource(struct vmw_validation_context *ctx,
bool *first_usage)
{
struct vmw_validation_res_node *node;
- int ret;
node = vmw_validation_find_res_dup(ctx, res);
if (node) {
@@ -330,14 +334,9 @@ int vmw_validation_add_resource(struct vmw_validation_context *ctx,
return -ENOMEM;
}
- if (ctx->ht) {
+ if (ctx->sw_context) {
node->hash.key = (unsigned long) res;
- ret = vmwgfx_ht_insert_item(ctx->ht, &node->hash);
- if (ret) {
- DRM_ERROR("Failed to initialize a resource validation "
- "entry.\n");
- return ret;
- }
+ hash_add_rcu(ctx->sw_context->res_ht, &node->hash.head, node->hash.key);
}
node->res = vmw_resource_reference_unless_doomed(res);
if (!node->res)
@@ -681,19 +680,19 @@ void vmw_validation_drop_ht(struct vmw_validation_context *ctx)
struct vmw_validation_bo_node *entry;
struct vmw_validation_res_node *val;
- if (!ctx->ht)
+ if (!ctx->sw_context)
return;
list_for_each_entry(entry, &ctx->bo_list, base.head)
- (void) vmwgfx_ht_remove_item(ctx->ht, &entry->hash);
+ hash_del_rcu(&entry->hash.head);
list_for_each_entry(val, &ctx->resource_list, head)
- (void) vmwgfx_ht_remove_item(ctx->ht, &val->hash);
+ hash_del_rcu(&val->hash.head);
list_for_each_entry(val, &ctx->resource_ctx_list, head)
- (void) vmwgfx_ht_remove_item(ctx->ht, &val->hash);
+ hash_del_rcu(&entry->hash.head);
- ctx->ht = NULL;
+ ctx->sw_context = NULL;
}
/**
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_validation.h b/drivers/gpu/drm/vmwgfx/vmwgfx_validation.h
index f21df053882b..ab9ec226f433 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_validation.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_validation.h
@@ -1,7 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/**************************************************************************
*
- * Copyright © 2018 VMware, Inc., Palo Alto, CA., USA
+ * Copyright © 2018 - 2022 VMware, Inc., Palo Alto, CA., USA
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
@@ -29,12 +29,11 @@
#define _VMWGFX_VALIDATION_H_
#include <linux/list.h>
+#include <linux/hashtable.h>
#include <linux/ww_mutex.h>
#include <drm/ttm/ttm_execbuf_util.h>
-#include "vmwgfx_hashtab.h"
-
#define VMW_RES_DIRTY_NONE 0
#define VMW_RES_DIRTY_SET BIT(0)
#define VMW_RES_DIRTY_CLEAR BIT(1)
@@ -59,7 +58,7 @@
* @total_mem: Amount of reserved memory.
*/
struct vmw_validation_context {
- struct vmwgfx_open_hash *ht;
+ struct vmw_sw_context *sw_context;
struct list_head resource_list;
struct list_head resource_ctx_list;
struct list_head bo_list;
@@ -82,16 +81,16 @@ struct vmw_fence_obj;
/**
* DECLARE_VAL_CONTEXT - Declare a validation context with initialization
* @_name: The name of the variable
- * @_ht: The hash table used to find dups or NULL if none
+ * @_sw_context: Contains the hash table used to find dups or NULL if none
* @_merge_dups: Whether to merge duplicate buffer object- or resource
* entries. If set to true, ideally a hash table pointer should be supplied
* as well unless the number of resources and buffer objects per validation
* is known to be very small
*/
#endif
-#define DECLARE_VAL_CONTEXT(_name, _ht, _merge_dups) \
+#define DECLARE_VAL_CONTEXT(_name, _sw_context, _merge_dups) \
struct vmw_validation_context _name = \
- { .ht = _ht, \
+ { .sw_context = _sw_context, \
.resource_list = LIST_HEAD_INIT((_name).resource_list), \
.resource_ctx_list = LIST_HEAD_INIT((_name).resource_ctx_list), \
.bo_list = LIST_HEAD_INIT((_name).bo_list), \
@@ -114,19 +113,6 @@ vmw_validation_has_bos(struct vmw_validation_context *ctx)
return !list_empty(&ctx->bo_list);
}
-/**
- * vmw_validation_set_ht - Register a hash table for duplicate finding
- * @ctx: The validation context
- * @ht: Pointer to a hash table to use for duplicate finding
- * This function is intended to be used if the hash table wasn't
- * available at validation context declaration time
- */
-static inline void vmw_validation_set_ht(struct vmw_validation_context *ctx,
- struct vmwgfx_open_hash *ht)
-{
- ctx->ht = ht;
-}
-
/**
* vmw_validation_bo_reserve - Reserve buffer objects registered with a
* validation context
--
2.34.1
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