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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 16:23:29 +07:00
9c1477e83e
A bug recently encountered involved the issue where are we were submitting requests to different ppGTT, each would pin a segment of the GGTT for its logical context and ring. However, this is invisible to eviction as we do not tie the context/ring VMA to a request and so do not automatically wait upon it them (instead they are marked as pinned, preventing eviction entirely). Instead the eviction code must flush those contexts by switching to the kernel context. This selftest tries to fill the GGTT with contexts to exercise a path where the switch-to-kernel-context failed to make forward progress and we fail with ENOSPC. v2: Make the hole in the filled GGTT explicit. v3: Swap out the arbitrary timeout for a private notification from i915_gem_evict_something() Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171012125726.14736-3-chris@chris-wilson.co.uk Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
95 lines
2.5 KiB
C
95 lines
2.5 KiB
C
/*
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* Copyright © 2016 Intel Corporation
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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 "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#include "mock_context.h"
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#include "mock_gtt.h"
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struct i915_gem_context *
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mock_context(struct drm_i915_private *i915,
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const char *name)
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{
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struct i915_gem_context *ctx;
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int ret;
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ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return NULL;
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kref_init(&ctx->ref);
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INIT_LIST_HEAD(&ctx->link);
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ctx->i915 = i915;
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INIT_RADIX_TREE(&ctx->handles_vma, GFP_KERNEL);
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INIT_LIST_HEAD(&ctx->handles_list);
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ret = ida_simple_get(&i915->contexts.hw_ida,
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0, MAX_CONTEXT_HW_ID, GFP_KERNEL);
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if (ret < 0)
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goto err_handles;
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ctx->hw_id = ret;
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if (name) {
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ctx->name = kstrdup(name, GFP_KERNEL);
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if (!ctx->name)
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goto err_put;
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ctx->ppgtt = mock_ppgtt(i915, name);
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if (!ctx->ppgtt)
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goto err_put;
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}
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return ctx;
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err_handles:
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kfree(ctx);
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return NULL;
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err_put:
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i915_gem_context_set_closed(ctx);
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i915_gem_context_put(ctx);
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return NULL;
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}
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void mock_context_close(struct i915_gem_context *ctx)
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{
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context_close(ctx);
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}
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void mock_init_contexts(struct drm_i915_private *i915)
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{
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INIT_LIST_HEAD(&i915->contexts.list);
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ida_init(&i915->contexts.hw_ida);
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INIT_WORK(&i915->contexts.free_work, contexts_free_worker);
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init_llist_head(&i915->contexts.free_list);
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}
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struct i915_gem_context *
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live_context(struct drm_i915_private *i915, struct drm_file *file)
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{
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lockdep_assert_held(&i915->drm.struct_mutex);
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return i915_gem_create_context(i915, file->driver_priv);
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}
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