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path: root/drivers/gpu/drm/i915/intel_context.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_context.c')
-rw-r--r--drivers/gpu/drm/i915/intel_context.c270
1 files changed, 0 insertions, 270 deletions
diff --git a/drivers/gpu/drm/i915/intel_context.c b/drivers/gpu/drm/i915/intel_context.c
deleted file mode 100644
index 924cc556223a..000000000000
--- a/drivers/gpu/drm/i915/intel_context.c
+++ /dev/null
@@ -1,270 +0,0 @@
-/*
- * SPDX-License-Identifier: MIT
- *
- * Copyright © 2019 Intel Corporation
- */
-
-#include "i915_drv.h"
-#include "i915_gem_context.h"
-#include "i915_globals.h"
-#include "intel_context.h"
-#include "intel_ringbuffer.h"
-
-static struct i915_global_context {
- struct i915_global base;
- struct kmem_cache *slab_ce;
-} global;
-
-struct intel_context *intel_context_alloc(void)
-{
- return kmem_cache_zalloc(global.slab_ce, GFP_KERNEL);
-}
-
-void intel_context_free(struct intel_context *ce)
-{
- kmem_cache_free(global.slab_ce, ce);
-}
-
-struct intel_context *
-intel_context_lookup(struct i915_gem_context *ctx,
- struct intel_engine_cs *engine)
-{
- struct intel_context *ce = NULL;
- struct rb_node *p;
-
- spin_lock(&ctx->hw_contexts_lock);
- p = ctx->hw_contexts.rb_node;
- while (p) {
- struct intel_context *this =
- rb_entry(p, struct intel_context, node);
-
- if (this->engine == engine) {
- GEM_BUG_ON(this->gem_context != ctx);
- ce = this;
- break;
- }
-
- if (this->engine < engine)
- p = p->rb_right;
- else
- p = p->rb_left;
- }
- spin_unlock(&ctx->hw_contexts_lock);
-
- return ce;
-}
-
-struct intel_context *
-__intel_context_insert(struct i915_gem_context *ctx,
- struct intel_engine_cs *engine,
- struct intel_context *ce)
-{
- struct rb_node **p, *parent;
- int err = 0;
-
- spin_lock(&ctx->hw_contexts_lock);
-
- parent = NULL;
- p = &ctx->hw_contexts.rb_node;
- while (*p) {
- struct intel_context *this;
-
- parent = *p;
- this = rb_entry(parent, struct intel_context, node);
-
- if (this->engine == engine) {
- err = -EEXIST;
- ce = this;
- break;
- }
-
- if (this->engine < engine)
- p = &parent->rb_right;
- else
- p = &parent->rb_left;
- }
- if (!err) {
- rb_link_node(&ce->node, parent, p);
- rb_insert_color(&ce->node, &ctx->hw_contexts);
- }
-
- spin_unlock(&ctx->hw_contexts_lock);
-
- return ce;
-}
-
-void __intel_context_remove(struct intel_context *ce)
-{
- struct i915_gem_context *ctx = ce->gem_context;
-
- spin_lock(&ctx->hw_contexts_lock);
- rb_erase(&ce->node, &ctx->hw_contexts);
- spin_unlock(&ctx->hw_contexts_lock);
-}
-
-static struct intel_context *
-intel_context_instance(struct i915_gem_context *ctx,
- struct intel_engine_cs *engine)
-{
- struct intel_context *ce, *pos;
-
- ce = intel_context_lookup(ctx, engine);
- if (likely(ce))
- return ce;
-
- ce = intel_context_alloc();
- if (!ce)
- return ERR_PTR(-ENOMEM);
-
- intel_context_init(ce, ctx, engine);
-
- pos = __intel_context_insert(ctx, engine, ce);
- if (unlikely(pos != ce)) /* Beaten! Use their HW context instead */
- intel_context_free(ce);
-
- GEM_BUG_ON(intel_context_lookup(ctx, engine) != pos);
- return pos;
-}
-
-struct intel_context *
-intel_context_pin_lock(struct i915_gem_context *ctx,
- struct intel_engine_cs *engine)
- __acquires(ce->pin_mutex)
-{
- struct intel_context *ce;
-
- ce = intel_context_instance(ctx, engine);
- if (IS_ERR(ce))
- return ce;
-
- if (mutex_lock_interruptible(&ce->pin_mutex))
- return ERR_PTR(-EINTR);
-
- return ce;
-}
-
-struct intel_context *
-intel_context_pin(struct i915_gem_context *ctx,
- struct intel_engine_cs *engine)
-{
- struct intel_context *ce;
- int err;
-
- ce = intel_context_instance(ctx, engine);
- if (IS_ERR(ce))
- return ce;
-
- if (likely(atomic_inc_not_zero(&ce->pin_count)))
- return ce;
-
- if (mutex_lock_interruptible(&ce->pin_mutex))
- return ERR_PTR(-EINTR);
-
- if (likely(!atomic_read(&ce->pin_count))) {
- err = ce->ops->pin(ce);
- if (err)
- goto err;
-
- i915_gem_context_get(ctx);
- GEM_BUG_ON(ce->gem_context != ctx);
-
- mutex_lock(&ctx->mutex);
- list_add(&ce->active_link, &ctx->active_engines);
- mutex_unlock(&ctx->mutex);
-
- intel_context_get(ce);
- smp_mb__before_atomic(); /* flush pin before it is visible */
- }
-
- atomic_inc(&ce->pin_count);
- GEM_BUG_ON(!intel_context_is_pinned(ce)); /* no overflow! */
-
- mutex_unlock(&ce->pin_mutex);
- return ce;
-
-err:
- mutex_unlock(&ce->pin_mutex);
- return ERR_PTR(err);
-}
-
-void intel_context_unpin(struct intel_context *ce)
-{
- if (likely(atomic_add_unless(&ce->pin_count, -1, 1)))
- return;
-
- /* We may be called from inside intel_context_pin() to evict another */
- intel_context_get(ce);
- mutex_lock_nested(&ce->pin_mutex, SINGLE_DEPTH_NESTING);
-
- if (likely(atomic_dec_and_test(&ce->pin_count))) {
- ce->ops->unpin(ce);
-
- mutex_lock(&ce->gem_context->mutex);
- list_del(&ce->active_link);
- mutex_unlock(&ce->gem_context->mutex);
-
- i915_gem_context_put(ce->gem_context);
- intel_context_put(ce);
- }
-
- mutex_unlock(&ce->pin_mutex);
- intel_context_put(ce);
-}
-
-static void intel_context_retire(struct i915_active_request *active,
- struct i915_request *rq)
-{
- struct intel_context *ce =
- container_of(active, typeof(*ce), active_tracker);
-
- intel_context_unpin(ce);
-}
-
-void
-intel_context_init(struct intel_context *ce,
- struct i915_gem_context *ctx,
- struct intel_engine_cs *engine)
-{
- kref_init(&ce->ref);
-
- ce->gem_context = ctx;
- ce->engine = engine;
- ce->ops = engine->cops;
- ce->saturated = 0;
-
- INIT_LIST_HEAD(&ce->signal_link);
- INIT_LIST_HEAD(&ce->signals);
-
- mutex_init(&ce->pin_mutex);
-
- /* Use the whole device by default */
- ce->sseu = intel_device_default_sseu(ctx->i915);
-
- i915_active_request_init(&ce->active_tracker,
- NULL, intel_context_retire);
-}
-
-static void i915_global_context_shrink(void)
-{
- kmem_cache_shrink(global.slab_ce);
-}
-
-static void i915_global_context_exit(void)
-{
- kmem_cache_destroy(global.slab_ce);
-}
-
-static struct i915_global_context global = { {
- .shrink = i915_global_context_shrink,
- .exit = i915_global_context_exit,
-} };
-
-int __init i915_global_context_init(void)
-{
- global.slab_ce = KMEM_CACHE(intel_context, SLAB_HWCACHE_ALIGN);
- if (!global.slab_ce)
- return -ENOMEM;
-
- i915_global_register(&global.base);
- return 0;
-}