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drm/vmwgfx: Refactor resource validation hashtable to use linux/hashtable implementation.
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@vmware.com> Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Signed-off-by: Zack Rusin <zackr@vmware.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221022040236.616490-6-zack@kde.org
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parent
931e09d8d5
commit
9e931f2e09
5 changed files with 58 additions and 66 deletions
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@ -830,6 +830,22 @@ static void vmw_write_driver_id(struct vmw_private *dev)
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}
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}
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static void vmw_sw_context_init(struct vmw_private *dev_priv)
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{
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struct vmw_sw_context *sw_context = &dev_priv->ctx;
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hash_init(sw_context->res_ht);
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}
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static void vmw_sw_context_fini(struct vmw_private *dev_priv)
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{
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struct vmw_sw_context *sw_context = &dev_priv->ctx;
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vfree(sw_context->cmd_bounce);
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if (sw_context->staged_bindings)
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vmw_binding_state_free(sw_context->staged_bindings);
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}
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static int vmw_driver_load(struct vmw_private *dev_priv, u32 pci_id)
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{
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int ret;
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@ -839,6 +855,8 @@ static int vmw_driver_load(struct vmw_private *dev_priv, u32 pci_id)
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dev_priv->drm.dev_private = dev_priv;
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vmw_sw_context_init(dev_priv);
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mutex_init(&dev_priv->cmdbuf_mutex);
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mutex_init(&dev_priv->binding_mutex);
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spin_lock_init(&dev_priv->resource_lock);
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@ -1168,9 +1186,7 @@ static void vmw_driver_unload(struct drm_device *dev)
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unregister_pm_notifier(&dev_priv->pm_nb);
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if (dev_priv->ctx.res_ht_initialized)
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vmwgfx_ht_remove(&dev_priv->ctx.res_ht);
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vfree(dev_priv->ctx.cmd_bounce);
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vmw_sw_context_fini(dev_priv);
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if (dev_priv->enable_fb) {
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vmw_fb_off(dev_priv);
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vmw_fb_close(dev_priv);
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@ -1198,8 +1214,6 @@ static void vmw_driver_unload(struct drm_device *dev)
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vmw_irq_uninstall(&dev_priv->drm);
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ttm_object_device_release(&dev_priv->tdev);
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if (dev_priv->ctx.staged_bindings)
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vmw_binding_state_free(dev_priv->ctx.staged_bindings);
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for (i = vmw_res_context; i < vmw_res_max; ++i)
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idr_destroy(&dev_priv->res_idr[i]);
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@ -30,6 +30,7 @@
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#include <linux/suspend.h>
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#include <linux/sync_file.h>
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#include <linux/hashtable.h>
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#include <drm/drm_auth.h>
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#include <drm/drm_device.h>
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@ -93,6 +94,7 @@
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#define VMW_RES_STREAM ttm_driver_type2
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#define VMW_RES_FENCE ttm_driver_type3
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#define VMW_RES_SHADER ttm_driver_type4
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#define VMW_RES_HT_ORDER 12
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#define MKSSTAT_CAPACITY_LOG2 5U
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#define MKSSTAT_CAPACITY (1U << MKSSTAT_CAPACITY_LOG2)
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@ -425,8 +427,7 @@ struct vmw_ctx_validation_info;
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* @ctx: The validation context
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*/
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struct vmw_sw_context{
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struct vmwgfx_open_hash res_ht;
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bool res_ht_initialized;
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DECLARE_HASHTABLE(res_ht, VMW_RES_HT_ORDER);
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bool kernel;
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struct vmw_fpriv *fp;
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struct drm_file *filp;
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@ -1,7 +1,7 @@
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// SPDX-License-Identifier: GPL-2.0 OR MIT
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/**************************************************************************
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*
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* Copyright 2009 - 2015 VMware, Inc., Palo Alto, CA., USA
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* Copyright 2009 - 2022 VMware, Inc., Palo Alto, CA., USA
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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@ -25,6 +25,7 @@
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*
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**************************************************************************/
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#include <linux/sync_file.h>
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#include <linux/hashtable.h>
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#include "vmwgfx_drv.h"
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#include "vmwgfx_reg.h"
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@ -34,7 +35,6 @@
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#include "vmwgfx_binding.h"
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#include "vmwgfx_mksstat.h"
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#define VMW_RES_HT_ORDER 12
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/*
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* Helper macro to get dx_ctx_node if available otherwise print an error
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@ -4101,7 +4101,7 @@ int vmw_execbuf_process(struct drm_file *file_priv,
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int ret;
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int32_t out_fence_fd = -1;
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struct sync_file *sync_file = NULL;
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DECLARE_VAL_CONTEXT(val_ctx, &sw_context->res_ht, 1);
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DECLARE_VAL_CONTEXT(val_ctx, sw_context, 1);
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if (flags & DRM_VMW_EXECBUF_FLAG_EXPORT_FENCE_FD) {
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out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
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@ -4164,14 +4164,6 @@ int vmw_execbuf_process(struct drm_file *file_priv,
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if (sw_context->staged_bindings)
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vmw_binding_state_reset(sw_context->staged_bindings);
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if (!sw_context->res_ht_initialized) {
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ret = vmwgfx_ht_create(&sw_context->res_ht, VMW_RES_HT_ORDER);
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if (unlikely(ret != 0))
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goto out_unlock;
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sw_context->res_ht_initialized = true;
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}
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INIT_LIST_HEAD(&sw_context->staged_cmd_res);
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sw_context->ctx = &val_ctx;
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ret = vmw_execbuf_tie_context(dev_priv, sw_context, dx_context_handle);
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@ -1,7 +1,7 @@
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// SPDX-License-Identifier: GPL-2.0 OR MIT
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/**************************************************************************
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*
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* Copyright © 2018 VMware, Inc., Palo Alto, CA., USA
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* Copyright © 2018 - 2022 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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@ -180,11 +180,16 @@ vmw_validation_find_bo_dup(struct vmw_validation_context *ctx,
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if (!ctx->merge_dups)
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return NULL;
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if (ctx->ht) {
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if (ctx->sw_context) {
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struct vmwgfx_hash_item *hash;
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unsigned long key = (unsigned long) vbo;
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if (!vmwgfx_ht_find_item(ctx->ht, (unsigned long) vbo, &hash))
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hash_for_each_possible_rcu(ctx->sw_context->res_ht, hash, head, key) {
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if (hash->key == key) {
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bo_node = container_of(hash, typeof(*bo_node), hash);
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break;
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}
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}
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} else {
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struct vmw_validation_bo_node *entry;
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@ -217,11 +222,16 @@ vmw_validation_find_res_dup(struct vmw_validation_context *ctx,
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if (!ctx->merge_dups)
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return NULL;
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if (ctx->ht) {
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if (ctx->sw_context) {
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struct vmwgfx_hash_item *hash;
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unsigned long key = (unsigned long) res;
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if (!vmwgfx_ht_find_item(ctx->ht, (unsigned long) res, &hash))
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hash_for_each_possible_rcu(ctx->sw_context->res_ht, hash, head, key) {
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if (hash->key == key) {
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res_node = container_of(hash, typeof(*res_node), hash);
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break;
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}
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}
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} else {
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struct vmw_validation_res_node *entry;
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@ -269,20 +279,15 @@ int vmw_validation_add_bo(struct vmw_validation_context *ctx,
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}
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} else {
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struct ttm_validate_buffer *val_buf;
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int ret;
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bo_node = vmw_validation_mem_alloc(ctx, sizeof(*bo_node));
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if (!bo_node)
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return -ENOMEM;
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if (ctx->ht) {
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if (ctx->sw_context) {
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bo_node->hash.key = (unsigned long) vbo;
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ret = vmwgfx_ht_insert_item(ctx->ht, &bo_node->hash);
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if (ret) {
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DRM_ERROR("Failed to initialize a buffer "
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"validation entry.\n");
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return ret;
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}
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hash_add_rcu(ctx->sw_context->res_ht, &bo_node->hash.head,
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bo_node->hash.key);
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}
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val_buf = &bo_node->base;
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val_buf->bo = ttm_bo_get_unless_zero(&vbo->base);
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@ -316,7 +321,6 @@ int vmw_validation_add_resource(struct vmw_validation_context *ctx,
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bool *first_usage)
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{
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struct vmw_validation_res_node *node;
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int ret;
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node = vmw_validation_find_res_dup(ctx, res);
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if (node) {
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@ -330,14 +334,9 @@ int vmw_validation_add_resource(struct vmw_validation_context *ctx,
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return -ENOMEM;
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}
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if (ctx->ht) {
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if (ctx->sw_context) {
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node->hash.key = (unsigned long) res;
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ret = vmwgfx_ht_insert_item(ctx->ht, &node->hash);
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if (ret) {
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DRM_ERROR("Failed to initialize a resource validation "
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"entry.\n");
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return ret;
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}
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hash_add_rcu(ctx->sw_context->res_ht, &node->hash.head, node->hash.key);
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}
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node->res = vmw_resource_reference_unless_doomed(res);
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if (!node->res)
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@ -681,19 +680,19 @@ void vmw_validation_drop_ht(struct vmw_validation_context *ctx)
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struct vmw_validation_bo_node *entry;
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struct vmw_validation_res_node *val;
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if (!ctx->ht)
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if (!ctx->sw_context)
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return;
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list_for_each_entry(entry, &ctx->bo_list, base.head)
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(void) vmwgfx_ht_remove_item(ctx->ht, &entry->hash);
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hash_del_rcu(&entry->hash.head);
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list_for_each_entry(val, &ctx->resource_list, head)
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(void) vmwgfx_ht_remove_item(ctx->ht, &val->hash);
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hash_del_rcu(&val->hash.head);
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list_for_each_entry(val, &ctx->resource_ctx_list, head)
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(void) vmwgfx_ht_remove_item(ctx->ht, &val->hash);
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hash_del_rcu(&entry->hash.head);
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ctx->ht = NULL;
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ctx->sw_context = NULL;
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}
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/**
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@ -1,7 +1,7 @@
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/* SPDX-License-Identifier: GPL-2.0 OR MIT */
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/**************************************************************************
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*
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* Copyright © 2018 VMware, Inc., Palo Alto, CA., USA
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* Copyright © 2018 - 2022 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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@ -29,12 +29,11 @@
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#define _VMWGFX_VALIDATION_H_
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#include <linux/list.h>
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#include <linux/hashtable.h>
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#include <linux/ww_mutex.h>
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#include <drm/ttm/ttm_execbuf_util.h>
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#include "vmwgfx_hashtab.h"
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#define VMW_RES_DIRTY_NONE 0
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#define VMW_RES_DIRTY_SET BIT(0)
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#define VMW_RES_DIRTY_CLEAR BIT(1)
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* @total_mem: Amount of reserved memory.
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*/
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struct vmw_validation_context {
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struct vmwgfx_open_hash *ht;
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struct vmw_sw_context *sw_context;
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struct list_head resource_list;
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struct list_head resource_ctx_list;
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struct list_head bo_list;
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@ -82,16 +81,16 @@ struct vmw_fence_obj;
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/**
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* DECLARE_VAL_CONTEXT - Declare a validation context with initialization
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* @_name: The name of the variable
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* @_ht: The hash table used to find dups or NULL if none
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* @_sw_context: Contains the hash table used to find dups or NULL if none
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* @_merge_dups: Whether to merge duplicate buffer object- or resource
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* entries. If set to true, ideally a hash table pointer should be supplied
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* as well unless the number of resources and buffer objects per validation
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* is known to be very small
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*/
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#endif
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#define DECLARE_VAL_CONTEXT(_name, _ht, _merge_dups) \
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#define DECLARE_VAL_CONTEXT(_name, _sw_context, _merge_dups) \
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struct vmw_validation_context _name = \
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{ .ht = _ht, \
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{ .sw_context = _sw_context, \
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.resource_list = LIST_HEAD_INIT((_name).resource_list), \
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.resource_ctx_list = LIST_HEAD_INIT((_name).resource_ctx_list), \
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.bo_list = LIST_HEAD_INIT((_name).bo_list), \
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return !list_empty(&ctx->bo_list);
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}
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/**
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* vmw_validation_set_ht - Register a hash table for duplicate finding
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* @ctx: The validation context
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* @ht: Pointer to a hash table to use for duplicate finding
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* This function is intended to be used if the hash table wasn't
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* available at validation context declaration time
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*/
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static inline void vmw_validation_set_ht(struct vmw_validation_context *ctx,
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struct vmwgfx_open_hash *ht)
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{
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ctx->ht = ht;
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}
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/**
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* vmw_validation_bo_reserve - Reserve buffer objects registered with a
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* validation context
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