@@ -17,7 +17,7 @@ static struct i915_global_context {
struct kmem_cache *slab_ce;
} global;
-struct intel_context *intel_context_alloc(void)
+static struct intel_context *intel_context_alloc(void)
{
return kmem_cache_zalloc(global.slab_ce, GFP_KERNEL);
}
@@ -28,104 +28,17 @@ void intel_context_free(struct intel_context *ce)
}
struct intel_context *
-intel_context_lookup(struct i915_gem_context *ctx,
+intel_context_create(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);
-}
-
-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 intel_context_get(ce);
+ struct intel_context *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 intel_context_get(pos);
+ return ce;
}
int __intel_context_do_pin(struct intel_context *ce)
@@ -204,6 +117,8 @@ intel_context_init(struct intel_context *ce,
struct i915_gem_context *ctx,
struct intel_engine_cs *engine)
{
+ GEM_BUG_ON(!engine->cops);
+
kref_init(&ce->ref);
ce->gem_context = ctx;
@@ -254,3 +169,18 @@ void intel_context_exit_engine(struct intel_context *ce)
{
intel_engine_pm_put(ce->engine);
}
+
+struct i915_request *intel_context_create_request(struct intel_context *ce)
+{
+ struct i915_request *rq;
+ int err;
+
+ err = intel_context_pin(ce);
+ if (unlikely(err))
+ return ERR_PTR(err);
+
+ rq = i915_request_create(ce);
+ intel_context_unpin(ce);
+
+ return rq;
+}
@@ -12,24 +12,16 @@
#include "intel_context_types.h"
#include "intel_engine_types.h"
-struct intel_context *intel_context_alloc(void);
-void intel_context_free(struct intel_context *ce);
-
void intel_context_init(struct intel_context *ce,
struct i915_gem_context *ctx,
struct intel_engine_cs *engine);
-/**
- * intel_context_lookup - Find the matching HW context for this (ctx, engine)
- * @ctx - the parent GEM context
- * @engine - the target HW engine
- *
- * May return NULL if the HW context hasn't been instantiated (i.e. unused).
- */
struct intel_context *
-intel_context_lookup(struct i915_gem_context *ctx,
+intel_context_create(struct i915_gem_context *ctx,
struct intel_engine_cs *engine);
+void intel_context_free(struct intel_context *ce);
+
/**
* intel_context_lock_pinned - Stablises the 'pinned' status of the HW context
* @ce - the context
@@ -71,17 +63,6 @@ static inline void intel_context_unlock_pinned(struct intel_context *ce)
mutex_unlock(&ce->pin_mutex);
}
-struct intel_context *
-__intel_context_insert(struct i915_gem_context *ctx,
- struct intel_engine_cs *engine,
- struct intel_context *ce);
-void
-__intel_context_remove(struct intel_context *ce);
-
-struct intel_context *
-intel_context_instance(struct i915_gem_context *ctx,
- struct intel_engine_cs *engine);
-
int __intel_context_do_pin(struct intel_context *ce);
static inline int intel_context_pin(struct intel_context *ce)
@@ -144,4 +125,6 @@ static inline void intel_context_timeline_unlock(struct intel_context *ce)
mutex_unlock(&ce->ring->timeline->mutex);
}
+struct i915_request *intel_context_create_request(struct intel_context *ce);
+
#endif /* __INTEL_CONTEXT_H__ */
@@ -10,7 +10,6 @@
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/mutex.h>
-#include <linux/rbtree.h>
#include <linux/types.h>
#include "i915_active_types.h"
@@ -61,7 +60,6 @@ struct intel_context {
struct i915_active_request active_tracker;
const struct intel_context_ops *ops;
- struct rb_node node;
/** sseu: Control eu/slice partitioning */
struct intel_sseu sseu;
@@ -716,7 +716,7 @@ static int pin_context(struct i915_gem_context *ctx,
struct intel_context *ce;
int err;
- ce = intel_context_instance(ctx, engine);
+ ce = i915_gem_context_get_engine(ctx, engine->id);
if (IS_ERR(ce))
return PTR_ERR(ce);
@@ -23,6 +23,7 @@
*/
#include "i915_drv.h"
+#include "i915_gem_context.h"
#include "intel_context.h"
#include "intel_engine_pm.h"
@@ -286,7 +287,7 @@ int mock_engine_init(struct intel_engine_cs *engine)
i915_timeline_set_subclass(&engine->timeline, TIMELINE_ENGINE);
engine->kernel_context =
- intel_context_instance(i915->kernel_context, engine);
+ i915_gem_context_get_engine(i915->kernel_context, engine->id);
if (IS_ERR(engine->kernel_context))
goto err_timeline;
@@ -1188,7 +1188,7 @@ int intel_vgpu_setup_submission(struct intel_vgpu *vgpu)
INIT_LIST_HEAD(&s->workload_q_head[i]);
s->shadow[i] = ERR_PTR(-EINVAL);
- ce = intel_context_instance(ctx, engine);
+ ce = i915_gem_context_get_engine(ctx, i);
if (IS_ERR(ce)) {
ret = PTR_ERR(ce);
goto out_shadow_ctx;
@@ -4289,8 +4289,9 @@ int i915_gem_init_hw(struct drm_i915_private *dev_priv)
static int __intel_engines_record_defaults(struct drm_i915_private *i915)
{
- struct i915_gem_context *ctx;
struct intel_engine_cs *engine;
+ struct i915_gem_context *ctx;
+ struct i915_gem_engines *e;
enum intel_engine_id id;
int err = 0;
@@ -4307,18 +4308,21 @@ static int __intel_engines_record_defaults(struct drm_i915_private *i915)
if (IS_ERR(ctx))
return PTR_ERR(ctx);
+ e = i915_gem_context_lock_engines(ctx);
+
for_each_engine(engine, i915, id) {
+ struct intel_context *ce = e->engines[id];
struct i915_request *rq;
- rq = i915_request_alloc(engine, ctx);
+ rq = intel_context_create_request(ce);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
- goto out_ctx;
+ goto err_active;
}
err = 0;
- if (engine->init_context)
- err = engine->init_context(rq);
+ if (rq->engine->init_context)
+ err = rq->engine->init_context(rq);
i915_request_add(rq);
if (err)
@@ -4332,15 +4336,10 @@ static int __intel_engines_record_defaults(struct drm_i915_private *i915)
}
for_each_engine(engine, i915, id) {
- struct intel_context *ce;
- struct i915_vma *state;
+ struct intel_context *ce = e->engines[id];
+ struct i915_vma *state = ce->state;
void *vaddr;
- ce = intel_context_lookup(ctx, engine);
- if (!ce)
- continue;
-
- state = ce->state;
if (!state)
continue;
@@ -4396,6 +4395,7 @@ static int __intel_engines_record_defaults(struct drm_i915_private *i915)
}
out_ctx:
+ i915_gem_context_unlock_engines(ctx);
i915_gem_context_set_closed(ctx);
i915_gem_context_put(ctx);
return err;
@@ -150,7 +150,7 @@ lookup_user_engine(struct i915_gem_context *ctx, u16 class, u16 instance)
if (!engine)
return ERR_PTR(-EINVAL);
- return intel_context_instance(ctx, engine);
+ return i915_gem_context_get_engine(ctx, engine->id);
}
static inline int new_hw_id(struct drm_i915_private *i915, gfp_t gfp)
@@ -242,10 +242,51 @@ static void release_hw_id(struct i915_gem_context *ctx)
mutex_unlock(&i915->contexts.mutex);
}
-static void i915_gem_context_free(struct i915_gem_context *ctx)
+static void __free_engines(struct i915_gem_engines *e, unsigned int count)
+{
+ while (count--) {
+ if (!e->engines[count])
+ continue;
+
+ intel_context_put(e->engines[count]);
+ }
+ kfree(e);
+}
+
+static void free_engines(struct i915_gem_engines *e)
+{
+ __free_engines(e, e->num_engines);
+}
+
+static struct i915_gem_engines *default_engines(struct i915_gem_context *ctx)
{
- struct intel_context *it, *n;
+ struct intel_engine_cs *engine;
+ struct i915_gem_engines *e;
+ enum intel_engine_id id;
+
+ e = kzalloc(struct_size(e, engines, I915_NUM_ENGINES), GFP_KERNEL);
+ if (!e)
+ return ERR_PTR(-ENOMEM);
+
+ e->i915 = ctx->i915;
+ for_each_engine(engine, ctx->i915, id) {
+ struct intel_context *ce;
+
+ ce = intel_context_create(ctx, engine);
+ if (IS_ERR(ce)) {
+ __free_engines(e, id);
+ return ERR_CAST(ce);
+ }
+
+ e->engines[id] = ce;
+ }
+ e->num_engines = id;
+
+ return e;
+}
+static void i915_gem_context_free(struct i915_gem_context *ctx)
+{
lockdep_assert_held(&ctx->i915->drm.struct_mutex);
GEM_BUG_ON(!i915_gem_context_is_closed(ctx));
GEM_BUG_ON(!list_empty(&ctx->active_engines));
@@ -253,8 +294,8 @@ static void i915_gem_context_free(struct i915_gem_context *ctx)
release_hw_id(ctx);
i915_ppgtt_put(ctx->ppgtt);
- rbtree_postorder_for_each_entry_safe(it, n, &ctx->hw_contexts, node)
- intel_context_put(it);
+ free_engines(rcu_access_pointer(ctx->engines));
+ mutex_destroy(&ctx->engines_mutex);
if (ctx->timeline)
i915_timeline_put(ctx->timeline);
@@ -363,6 +404,8 @@ static struct i915_gem_context *
__create_context(struct drm_i915_private *dev_priv)
{
struct i915_gem_context *ctx;
+ struct i915_gem_engines *e;
+ int err;
int i;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
@@ -376,8 +419,13 @@ __create_context(struct drm_i915_private *dev_priv)
INIT_LIST_HEAD(&ctx->active_engines);
mutex_init(&ctx->mutex);
- ctx->hw_contexts = RB_ROOT;
- spin_lock_init(&ctx->hw_contexts_lock);
+ mutex_init(&ctx->engines_mutex);
+ e = default_engines(ctx);
+ if (IS_ERR(e)) {
+ err = PTR_ERR(e);
+ goto err_free;
+ }
+ RCU_INIT_POINTER(ctx->engines, e);
INIT_RADIX_TREE(&ctx->handles_vma, GFP_KERNEL);
INIT_LIST_HEAD(&ctx->handles_list);
@@ -399,6 +447,10 @@ __create_context(struct drm_i915_private *dev_priv)
ctx->hang_timestamp[i] = jiffies - CONTEXT_FAST_HANG_JIFFIES;
return ctx;
+
+err_free:
+ kfree(ctx);
+ return ERR_PTR(err);
}
static struct i915_hw_ppgtt *
@@ -857,7 +909,8 @@ static int context_barrier_task(struct i915_gem_context *ctx,
{
struct drm_i915_private *i915 = ctx->i915;
struct context_barrier_task *cb;
- struct intel_context *ce, *next;
+ struct i915_gem_engines_iter it;
+ struct intel_context *ce;
int err = 0;
lockdep_assert_held(&i915->drm.struct_mutex);
@@ -870,20 +923,22 @@ static int context_barrier_task(struct i915_gem_context *ctx,
i915_active_init(i915, &cb->base, cb_retire);
i915_active_acquire(&cb->base);
- rbtree_postorder_for_each_entry_safe(ce, next, &ctx->hw_contexts, node) {
- struct intel_engine_cs *engine = ce->engine;
+ for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) {
struct i915_request *rq;
- if (!(engine->mask & engines))
+ if (!(ce->engine->mask & engines))
+ continue;
+
+ if (!intel_context_is_pinned(ce))
continue;
if (I915_SELFTEST_ONLY(context_barrier_inject_fault &
- engine->mask)) {
+ ce->engine->mask)) {
err = -ENXIO;
break;
}
- rq = i915_request_alloc(engine, ctx);
+ rq = intel_context_create_request(ce);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
break;
@@ -899,6 +954,7 @@ static int context_barrier_task(struct i915_gem_context *ctx,
if (err)
break;
}
+ i915_gem_context_unlock_engines(ctx);
cb->task = err ? NULL : task; /* caller needs to unwind instead */
cb->data = data;
@@ -1729,6 +1785,23 @@ int __i915_gem_context_pin_hw_id(struct i915_gem_context *ctx)
return err;
}
+/* GEM context-engines iterator: for_each_gem_engine() */
+struct intel_context *
+i915_gem_engines_iter_next(struct i915_gem_engines_iter *it)
+{
+ const struct i915_gem_engines *e = it->engines;
+ struct intel_context *ctx;
+
+ do {
+ if (it->idx >= e->num_engines)
+ return NULL;
+
+ ctx = e->engines[it->idx++];
+ } while (!ctx);
+
+ return ctx;
+}
+
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
#include "selftests/mock_context.c"
#include "selftests/i915_gem_context.c"
@@ -176,6 +176,64 @@ static inline void i915_gem_context_put(struct i915_gem_context *ctx)
kref_put(&ctx->ref, i915_gem_context_release);
}
+static inline struct i915_gem_engines *
+i915_gem_context_engines(struct i915_gem_context *ctx)
+{
+ return rcu_dereference_protected(ctx->engines,
+ lockdep_is_held(&ctx->engines_mutex));
+}
+
+static inline struct i915_gem_engines *
+i915_gem_context_lock_engines(struct i915_gem_context *ctx)
+ __acquires(&ctx->engines_mutex)
+{
+ mutex_lock(&ctx->engines_mutex);
+ return i915_gem_context_engines(ctx);
+}
+
+static inline void
+i915_gem_context_unlock_engines(struct i915_gem_context *ctx)
+ __releases(&ctx->engines_mutex)
+{
+ mutex_unlock(&ctx->engines_mutex);
+}
+
+static inline struct intel_context *
+i915_gem_context_lookup_engine(struct i915_gem_context *ctx, unsigned int idx)
+{
+ return i915_gem_context_engines(ctx)->engines[idx];
+}
+
+static inline struct intel_context *
+i915_gem_context_get_engine(struct i915_gem_context *ctx, unsigned int idx)
+{
+ struct intel_context *ce = ERR_PTR(-EINVAL);
+
+ rcu_read_lock(); {
+ struct i915_gem_engines *e = rcu_dereference(ctx->engines);
+ if (likely(idx < e->num_engines && e->engines[idx]))
+ ce = intel_context_get(e->engines[idx]);
+ } rcu_read_unlock();
+
+ return ce;
+}
+
+static inline void
+i915_gem_engines_iter_init(struct i915_gem_engines_iter *it,
+ struct i915_gem_engines *engines)
+{
+ GEM_BUG_ON(!engines);
+ it->engines = engines;
+ it->idx = 0;
+}
+
+struct intel_context *
+i915_gem_engines_iter_next(struct i915_gem_engines_iter *it);
+
+#define for_each_gem_engine(ce, engines, it) \
+ for (i915_gem_engines_iter_init(&(it), (engines)); \
+ ((ce) = i915_gem_engines_iter_next(&(it)));)
+
struct i915_lut_handle *i915_lut_handle_alloc(void);
void i915_lut_handle_free(struct i915_lut_handle *lut);
@@ -29,6 +29,18 @@ struct i915_hw_ppgtt;
struct i915_timeline;
struct intel_ring;
+struct i915_gem_engines {
+ struct rcu_work rcu;
+ struct drm_i915_private *i915;
+ unsigned int num_engines;
+ struct intel_context *engines[];
+};
+
+struct i915_gem_engines_iter {
+ unsigned int idx;
+ const struct i915_gem_engines *engines;
+};
+
/**
* struct i915_gem_context - client state
*
@@ -42,6 +54,30 @@ struct i915_gem_context {
/** file_priv: owning file descriptor */
struct drm_i915_file_private *file_priv;
+ /**
+ * @engines: User defined engines for this context
+ *
+ * Various uAPI offer the ability to lookup up an
+ * index from this array to select an engine operate on.
+ *
+ * Multiple logically distinct instances of the same engine
+ * may be defined in the array, as well as composite virtual
+ * engines.
+ *
+ * Execbuf uses the I915_EXEC_RING_MASK as an index into this
+ * array to select which HW context + engine to execute on. For
+ * the default array, the user_ring_map[] is used to translate
+ * the legacy uABI onto the approprate index (e.g. both
+ * I915_EXEC_DEFAULT and I915_EXEC_RENDER select the same
+ * context, and I915_EXEC_BSD is weird). For a use defined
+ * array, execbuf uses I915_EXEC_RING_MASK as a plain index.
+ *
+ * User defined by I915_CONTEXT_PARAM_ENGINE (when the
+ * CONTEXT_USER_ENGINES flag is set).
+ */
+ struct i915_gem_engines __rcu *engines;
+ struct mutex engines_mutex; /* guards writes to engines */
+
struct i915_timeline *timeline;
/**
@@ -134,10 +170,6 @@ struct i915_gem_context {
struct i915_sched_attr sched;
- /** hw_contexts: per-engine logical HW state */
- struct rb_root hw_contexts;
- spinlock_t hw_contexts_lock;
-
/** ring_size: size for allocating the per-engine ring buffer */
u32 ring_size;
/** desc_template: invariant fields for the HW context descriptor */
@@ -2076,9 +2076,7 @@ gen8_dispatch_bsd_engine(struct drm_i915_private *dev_priv,
return file_priv->bsd_engine;
}
-#define I915_USER_RINGS (4)
-
-static const enum intel_engine_id user_ring_map[I915_USER_RINGS + 1] = {
+static const enum intel_engine_id user_ring_map[] = {
[I915_EXEC_DEFAULT] = RCS0,
[I915_EXEC_RENDER] = RCS0,
[I915_EXEC_BLT] = BCS0,
@@ -2086,10 +2084,8 @@ static const enum intel_engine_id user_ring_map[I915_USER_RINGS + 1] = {
[I915_EXEC_VEBOX] = VECS0
};
-static int eb_pin_context(struct i915_execbuffer *eb,
- struct intel_engine_cs *engine)
+static int eb_pin_context(struct i915_execbuffer *eb, struct intel_context *ce)
{
- struct intel_context *ce;
int err;
/*
@@ -2100,21 +2096,16 @@ static int eb_pin_context(struct i915_execbuffer *eb,
if (err)
return err;
- ce = intel_context_instance(eb->gem_context, engine);
- if (IS_ERR(ce))
- return PTR_ERR(ce);
-
/*
* Pinning the contexts may generate requests in order to acquire
* GGTT space, so do this first before we reserve a seqno for
* ourselves.
*/
err = intel_context_pin(ce);
- intel_context_put(ce);
if (err)
return err;
- eb->engine = engine;
+ eb->engine = ce->engine;
eb->context = ce;
return 0;
}
@@ -2124,25 +2115,19 @@ static void eb_unpin_context(struct i915_execbuffer *eb)
intel_context_unpin(eb->context);
}
-static int
-eb_select_engine(struct i915_execbuffer *eb,
- struct drm_file *file,
- struct drm_i915_gem_execbuffer2 *args)
+static unsigned int
+eb_select_legacy_ring(struct i915_execbuffer *eb,
+ struct drm_file *file,
+ struct drm_i915_gem_execbuffer2 *args)
{
struct drm_i915_private *i915 = eb->i915;
unsigned int user_ring_id = args->flags & I915_EXEC_RING_MASK;
- struct intel_engine_cs *engine;
-
- if (user_ring_id > I915_USER_RINGS) {
- DRM_DEBUG("execbuf with unknown ring: %u\n", user_ring_id);
- return -EINVAL;
- }
- if ((user_ring_id != I915_EXEC_BSD) &&
- ((args->flags & I915_EXEC_BSD_MASK) != 0)) {
+ if (user_ring_id != I915_EXEC_BSD &&
+ (args->flags & I915_EXEC_BSD_MASK)) {
DRM_DEBUG("execbuf with non bsd ring but with invalid "
"bsd dispatch flags: %d\n", (int)(args->flags));
- return -EINVAL;
+ return -1;
}
if (user_ring_id == I915_EXEC_BSD && HAS_ENGINE(i915, VCS1)) {
@@ -2157,20 +2142,39 @@ eb_select_engine(struct i915_execbuffer *eb,
} else {
DRM_DEBUG("execbuf with unknown bsd ring: %u\n",
bsd_idx);
- return -EINVAL;
+ return -1;
}
- engine = i915->engine[_VCS(bsd_idx)];
- } else {
- engine = i915->engine[user_ring_map[user_ring_id]];
+ return _VCS(bsd_idx);
}
- if (!engine) {
- DRM_DEBUG("execbuf with invalid ring: %u\n", user_ring_id);
- return -EINVAL;
+ if (user_ring_id >= ARRAY_SIZE(user_ring_map)) {
+ DRM_DEBUG("execbuf with unknown ring: %u\n", user_ring_id);
+ return -1;
}
- return eb_pin_context(eb, engine);
+ return user_ring_map[user_ring_id];
+}
+
+static int
+eb_select_engine(struct i915_execbuffer *eb,
+ struct drm_file *file,
+ struct drm_i915_gem_execbuffer2 *args)
+{
+ struct intel_context *ce;
+ unsigned int idx;
+ int err;
+
+ idx = eb_select_legacy_ring(eb, file, args);
+
+ ce = i915_gem_context_get_engine(eb->gem_context, idx);
+ if (IS_ERR(ce))
+ return PTR_ERR(ce);
+
+ err = eb_pin_context(eb, ce);
+ intel_context_put(ce);
+
+ return err;
}
static void
@@ -1203,35 +1203,35 @@ static int i915_oa_read(struct i915_perf_stream *stream,
static struct intel_context *oa_pin_context(struct drm_i915_private *i915,
struct i915_gem_context *ctx)
{
- struct intel_engine_cs *engine = i915->engine[RCS0];
+ struct i915_gem_engines_iter it;
struct intel_context *ce;
int err;
- ce = intel_context_instance(ctx, engine);
- if (IS_ERR(ce))
- return ce;
-
err = i915_mutex_lock_interruptible(&i915->drm);
- if (err) {
- intel_context_put(ce);
+ if (err)
return ERR_PTR(err);
+
+ for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) {
+ if (ce->engine->class != RENDER_CLASS)
+ continue;
+
+ /*
+ * As the ID is the gtt offset of the context's vma we
+ * pin the vma to ensure the ID remains fixed.
+ */
+ err = intel_context_pin(ce);
+ if (err == 0) {
+ i915->perf.oa.pinned_ctx = ce;
+ break;
+ }
}
+ i915_gem_context_unlock_engines(ctx);
- /*
- * As the ID is the gtt offset of the context's vma we
- * pin the vma to ensure the ID remains fixed.
- *
- * NB: implied RCS engine...
- */
- err = intel_context_pin(ce);
mutex_unlock(&i915->drm.struct_mutex);
- intel_context_put(ce);
if (err)
return ERR_PTR(err);
- i915->perf.oa.pinned_ctx = ce;
-
- return ce;
+ return i915->perf.oa.pinned_ctx;
}
/**
@@ -1717,7 +1717,6 @@ gen8_update_reg_state_unlocked(struct intel_context *ce,
static int gen8_configure_all_contexts(struct drm_i915_private *dev_priv,
const struct i915_oa_config *oa_config)
{
- struct intel_engine_cs *engine = dev_priv->engine[RCS0];
unsigned int map_type = i915_coherent_map_type(dev_priv);
struct i915_gem_context *ctx;
struct i915_request *rq;
@@ -1746,30 +1745,43 @@ static int gen8_configure_all_contexts(struct drm_i915_private *dev_priv,
/* Update all contexts now that we've stalled the submission. */
list_for_each_entry(ctx, &dev_priv->contexts.list, link) {
- struct intel_context *ce = intel_context_lookup(ctx, engine);
- u32 *regs;
-
- /* OA settings will be set upon first use */
- if (!ce || !ce->state)
- continue;
-
- regs = i915_gem_object_pin_map(ce->state->obj, map_type);
- if (IS_ERR(regs))
- return PTR_ERR(regs);
+ struct i915_gem_engines_iter it;
+ struct intel_context *ce;
+
+ for_each_gem_engine(ce,
+ i915_gem_context_lock_engines(ctx),
+ it) {
+ u32 *regs;
+
+ if (ce->engine->class != RENDER_CLASS)
+ continue;
+
+ /* OA settings will be set upon first use */
+ if (!ce->state)
+ continue;
+
+ regs = i915_gem_object_pin_map(ce->state->obj,
+ map_type);
+ if (IS_ERR(regs)) {
+ i915_gem_context_unlock_engines(ctx);
+ return PTR_ERR(regs);
+ }
- ce->state->obj->mm.dirty = true;
- regs += LRC_STATE_PN * PAGE_SIZE / sizeof(*regs);
+ ce->state->obj->mm.dirty = true;
+ regs += LRC_STATE_PN * PAGE_SIZE / sizeof(*regs);
- gen8_update_reg_state_unlocked(ce, regs, oa_config);
+ gen8_update_reg_state_unlocked(ce, regs, oa_config);
- i915_gem_object_unpin_map(ce->state->obj);
+ i915_gem_object_unpin_map(ce->state->obj);
+ }
+ i915_gem_context_unlock_engines(ctx);
}
/*
* Apply the configuration by doing one context restore of the edited
* context image.
*/
- rq = i915_request_create(engine->kernel_context);
+ rq = i915_request_create(dev_priv->engine[RCS0]->kernel_context);
if (IS_ERR(rq))
return PTR_ERR(rq);
@@ -786,7 +786,6 @@ i915_request_alloc(struct intel_engine_cs *engine, struct i915_gem_context *ctx)
struct drm_i915_private *i915 = engine->i915;
struct intel_context *ce;
struct i915_request *rq;
- int err;
/*
* Preempt contexts are reserved for exclusive use to inject a
@@ -800,21 +799,13 @@ i915_request_alloc(struct intel_engine_cs *engine, struct i915_gem_context *ctx)
* GGTT space, so do this first before we reserve a seqno for
* ourselves.
*/
- ce = intel_context_instance(ctx, engine);
+ ce = i915_gem_context_get_engine(ctx, engine->id);
if (IS_ERR(ce))
return ERR_CAST(ce);
- err = intel_context_pin(ce);
- if (err) {
- rq = ERR_PTR(err);
- goto err_put;
- }
-
- rq = i915_request_create(ce);
- intel_context_unpin(ce);
-
-err_put:
+ rq = intel_context_create_request(ce);
intel_context_put(ce);
+
return rq;
}
@@ -364,11 +364,10 @@ static void guc_stage_desc_pool_destroy(struct intel_guc *guc)
static void guc_stage_desc_init(struct intel_guc_client *client)
{
struct intel_guc *guc = client->guc;
- struct drm_i915_private *dev_priv = guc_to_i915(guc);
- struct intel_engine_cs *engine;
struct i915_gem_context *ctx = client->owner;
+ struct i915_gem_engines_iter it;
struct guc_stage_desc *desc;
- unsigned int tmp;
+ struct intel_context *ce;
u32 gfx_addr;
desc = __get_stage_desc(client);
@@ -382,10 +381,11 @@ static void guc_stage_desc_init(struct intel_guc_client *client)
desc->priority = client->priority;
desc->db_id = client->doorbell_id;
- for_each_engine_masked(engine, dev_priv, client->engines, tmp) {
- struct intel_context *ce = intel_context_lookup(ctx, engine);
- u32 guc_engine_id = engine->guc_id;
- struct guc_execlist_context *lrc = &desc->lrc[guc_engine_id];
+ for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) {
+ struct guc_execlist_context *lrc;
+
+ if (!(ce->engine->mask & client->engines))
+ continue;
/* TODO: We have a design issue to be solved here. Only when we
* receive the first batch, we know which engine is used by the
@@ -394,7 +394,7 @@ static void guc_stage_desc_init(struct intel_guc_client *client)
* for now who owns a GuC client. But for future owner of GuC
* client, need to make sure lrc is pinned prior to enter here.
*/
- if (!ce || !ce->state)
+ if (!ce->state)
break; /* XXX: continue? */
/*
@@ -404,6 +404,7 @@ static void guc_stage_desc_init(struct intel_guc_client *client)
* Instead, the GuC uses the LRCA of the user mode context (see
* guc_add_request below).
*/
+ lrc = &desc->lrc[ce->engine->guc_id];
lrc->context_desc = lower_32_bits(ce->lrc_desc);
/* The state page is after PPHWSP */
@@ -414,15 +415,16 @@ static void guc_stage_desc_init(struct intel_guc_client *client)
* here. In proxy submission, it wants the stage id
*/
lrc->context_id = (client->stage_id << GUC_ELC_CTXID_OFFSET) |
- (guc_engine_id << GUC_ELC_ENGINE_OFFSET);
+ (ce->engine->guc_id << GUC_ELC_ENGINE_OFFSET);
lrc->ring_begin = intel_guc_ggtt_offset(guc, ce->ring->vma);
lrc->ring_end = lrc->ring_begin + ce->ring->size - 1;
lrc->ring_next_free_location = lrc->ring_begin;
lrc->ring_current_tail_pointer_value = 0;
- desc->engines_used |= (1 << guc_engine_id);
+ desc->engines_used |= BIT(ce->engine->guc_id);
}
+ i915_gem_context_unlock_engines(ctx);
DRM_DEBUG_DRIVER("Host engines 0x%x => GuC engines used 0x%x\n",
client->engines, desc->engines_used);
@@ -1094,7 +1094,7 @@ __igt_ctx_sseu(struct drm_i915_private *i915,
wakeref = intel_runtime_pm_get(i915);
- ce = intel_context_instance(ctx, i915->engine[RCS0]);
+ ce = i915_gem_context_get_engine(ctx, RCS0);
if (IS_ERR(ce)) {
ret = PTR_ERR(ce);
goto out_rpm;
@@ -30,6 +30,7 @@ mock_context(struct drm_i915_private *i915,
const char *name)
{
struct i915_gem_context *ctx;
+ struct i915_gem_engines *e;
int ret;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
@@ -40,8 +41,11 @@ mock_context(struct drm_i915_private *i915,
INIT_LIST_HEAD(&ctx->link);
ctx->i915 = i915;
- ctx->hw_contexts = RB_ROOT;
- spin_lock_init(&ctx->hw_contexts_lock);
+ mutex_init(&ctx->engines_mutex);
+ e = default_engines(ctx);
+ if (IS_ERR(e))
+ goto err_free;
+ RCU_INIT_POINTER(ctx->engines, e);
INIT_RADIX_TREE(&ctx->handles_vma, GFP_KERNEL);
INIT_LIST_HEAD(&ctx->handles_list);
@@ -51,7 +55,7 @@ mock_context(struct drm_i915_private *i915,
ret = i915_gem_context_pin_hw_id(ctx);
if (ret < 0)
- goto err_handles;
+ goto err_engines;
if (name) {
struct i915_hw_ppgtt *ppgtt;
@@ -69,7 +73,9 @@ mock_context(struct drm_i915_private *i915,
return ctx;
-err_handles:
+err_engines:
+ free_engines(rcu_access_pointer(ctx->engines));
+err_free:
kfree(ctx);
return NULL;