[Intel-gfx] [PATCH 16/46] drm/i915/guc: Implement GuC parent-child context pin / unpin functions

Matthew Brost
2021-08-03T22:12:34Z

Implement GuC parent-child context pin / unpin functions in which in any
contexts in the relationship are pinned all the contexts are pinned. The
parent owns most of the pinning / unpinning process and the children
direct any pins / unpins to the parent.

Patch implements a number of unused functions that will be connected
later in the series.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
drivers/gpu/drm/i915/gt/intel_context.c | 187 ++++++++++++++++--
drivers/gpu/drm/i915/gt/intel_context.h | 43 +---
drivers/gpu/drm/i915/gt/intel_context_types.h | 4 +-
.../drm/i915/gt/intel_execlists_submission.c | 25 ++-
drivers/gpu/drm/i915/gt/intel_lrc.c | 26 +--
drivers/gpu/drm/i915/gt/intel_lrc.h | 6 +-
.../gpu/drm/i915/gt/intel_ring_submission.c | 5 +-
drivers/gpu/drm/i915/gt/mock_engine.c | 4 +-
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 183 +++++++++++++++--
9 files changed, 371 insertions(+), 112 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c
index 8cb92b10b547..bb4c14656067 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.c
+++ b/drivers/gpu/drm/i915/gt/intel_context.c
@@ -158,8 +158,8 @@ static void __ring_retire(struct intel_ring *ring)
intel_ring_unpin(ring);
}

-static int intel_context_pre_pin(struct intel_context *ce,
- struct i915_gem_ww_ctx *ww)
+static int __intel_context_pre_pin(struct intel_context *ce,
+ struct i915_gem_ww_ctx *ww)
{
int err;

@@ -190,7 +190,7 @@ static int intel_context_pre_pin(struct intel_context *ce,
return err;
}

-static void intel_context_post_unpin(struct intel_context *ce)
+static void __intel_context_post_unpin(struct intel_context *ce)
{
if (ce->state)
__context_unpin_state(ce->state);
@@ -199,13 +199,85 @@ static void intel_context_post_unpin(struct intel_context *ce)
__ring_retire(ce->ring);
}

-int __intel_context_do_pin_ww(struct intel_context *ce,
- struct i915_gem_ww_ctx *ww)
+static int intel_context_pre_pin(struct intel_context *ce,
+ struct i915_gem_ww_ctx *ww)
{
- bool handoff = false;
- void *vaddr;
+ struct intel_context *child;
+ int err, i = 0;
+
+ GEM_BUG_ON(intel_context_is_child(ce));
+
+ for_each_child(ce, child) {
+ err = __intel_context_pre_pin(child, ww);
+ if (unlikely(err))
+ goto unwind;
+ ++i;
+ }
+
+ err = __intel_context_pre_pin(ce, ww);
+ if (unlikely(err))
+ goto unwind;
+
+ return 0;
+
+unwind:
+ for_each_child(ce, child) {
+ if (!i--)
+ break;
+ __intel_context_post_unpin(ce);
+ }
+
+ return err;
+}
+
+static void intel_context_post_unpin(struct intel_context *ce)
+{
+ struct intel_context *child;
+
+ GEM_BUG_ON(intel_context_is_child(ce));
+
+ for_each_child(ce, child)
+ __intel_context_post_unpin(child);
+
+ __intel_context_post_unpin(ce);
+}
+
+static int __do_ww_lock(struct intel_context *ce,
+ struct i915_gem_ww_ctx *ww)
+{
+ int err = i915_gem_object_lock(ce->timeline->hwsp_ggtt->obj, ww);
+
+ if (!err && ce->ring->vma->obj)
+ err = i915_gem_object_lock(ce->ring->vma->obj, ww);
+ if (!err && ce->state)
+ err = i915_gem_object_lock(ce->state->obj, ww);
+
+ return err;
+}
+
+static int do_ww_lock(struct intel_context *ce,
+ struct i915_gem_ww_ctx *ww)
+{
+ struct intel_context *child;
int err = 0;

+ GEM_BUG_ON(intel_context_is_child(ce));
+
+ for_each_child(ce, child) {
+ err = __do_ww_lock(child, ww);
+ if (unlikely(err))
+ return err;
+ }
+
+ return __do_ww_lock(ce, ww);
+}
+
+static int __intel_context_do_pin_ww(struct intel_context *ce,
+ struct i915_gem_ww_ctx *ww)
+{
+ bool handoff = false;
+ int err;
+
if (unlikely(!test_bit(CONTEXT_ALLOC_BIT, &ce->flags))) {
err = intel_context_alloc_state(ce);
if (err)
@@ -217,14 +289,11 @@ int __intel_context_do_pin_ww(struct intel_context *ce,
* refcount for __intel_context_active(), which prevent a lock
* inversion of ce->pin_mutex vs dma_resv_lock().
*/
+ err = do_ww_lock(ce, ww);
+ if (err)
+ return err;

- err = i915_gem_object_lock(ce->timeline->hwsp_ggtt->obj, ww);
- if (!err && ce->ring->vma->obj)
- err = i915_gem_object_lock(ce->ring->vma->obj, ww);
- if (!err && ce->state)
- err = i915_gem_object_lock(ce->state->obj, ww);
- if (!err)
- err = intel_context_pre_pin(ce, ww);
+ err = intel_context_pre_pin(ce, ww);
if (err)
return err;

@@ -232,7 +301,7 @@ int __intel_context_do_pin_ww(struct intel_context *ce,
if (err)
goto err_ctx_unpin;

- err = ce->ops->pre_pin(ce, ww, &vaddr);
+ err = ce->ops->pre_pin(ce, ww);
if (err)
goto err_release;

@@ -250,7 +319,7 @@ int __intel_context_do_pin_ww(struct intel_context *ce,
if (unlikely(err))
goto err_unlock;

- err = ce->ops->pin(ce, vaddr);
+ err = ce->ops->pin(ce);
if (err) {
intel_context_active_release(ce);
goto err_unlock;
@@ -290,7 +359,7 @@ int __intel_context_do_pin_ww(struct intel_context *ce,
return err;
}

-int __intel_context_do_pin(struct intel_context *ce)
+static int __intel_context_do_pin(struct intel_context *ce)
{
struct i915_gem_ww_ctx ww;
int err;
@@ -337,7 +406,7 @@ static void __intel_context_retire(struct i915_active *active)
intel_context_get_avg_runtime_ns(ce));

set_bit(CONTEXT_VALID_BIT, &ce->flags);
- intel_context_post_unpin(ce);
+ __intel_context_post_unpin(ce);
intel_context_put(ce);
}

@@ -562,6 +631,88 @@ void intel_context_bind_parent_child(struct intel_context *parent,
child->parent = parent;
}

+static inline int ____intel_context_pin(struct intel_context *ce)
+{
+ if (likely(intel_context_pin_if_active(ce)))
+ return 0;
+
+ return __intel_context_do_pin(ce);
+}
+
+static inline int __intel_context_pin_ww(struct intel_context *ce,
+ struct i915_gem_ww_ctx *ww)
+{
+ if (likely(intel_context_pin_if_active(ce)))
+ return 0;
+
+ return __intel_context_do_pin_ww(ce, ww);
+}
+
+static inline void __intel_context_unpin(struct intel_context *ce)
+{
+ if (!ce->ops->sched_disable) {
+ __intel_context_do_unpin(ce, 1);
+ } else {
+ /*
+ * Move ownership of this pin to the scheduling disable which is
+ * an async operation. When that operation completes the above
+ * intel_context_sched_disable_unpin is called potentially
+ * unpinning the context.
+ */
+ while (!atomic_add_unless(&ce->pin_count, -1, 1)) {
+ if (atomic_cmpxchg(&ce->pin_count, 1, 2) == 1) {
+ ce->ops->sched_disable(ce);
+ break;
+ }
+ }
+ }
+}
+
+/*
+ * FIXME: This is ugly, these branches are only needed for parallel contexts in
+ * GuC submission. Basically the idea is if any of the contexts, that are
+ * configured for parallel submission, are pinned all the contexts need to be
+ * pinned in order to register these contexts with the GuC. We are adding the
+ * layer here while it should probably be pushed to the backend via a vfunc. But
+ * since we already have ce->pin + a layer atop it is confusing. Definitely
+ * needs a bit of rework how to properly layer / structure this code path. What
+ * is in place works but is not ideal.
+ */
+int intel_context_pin(struct intel_context *ce)
+{
+ if (intel_context_is_child(ce)) {
+ if (!atomic_fetch_add(1, &ce->pin_count))
+ return ____intel_context_pin(ce->parent);
+ else
+ return 0;
+ } else {
+ return ____intel_context_pin(ce);
+ }
+}
+
+int intel_context_pin_ww(struct intel_context *ce,
+ struct i915_gem_ww_ctx *ww)
+{
+ if (intel_context_is_child(ce)) {
+ if (!atomic_fetch_add(1, &ce->pin_count))
+ return __intel_context_pin_ww(ce->parent, ww);
+ else
+ return 0;
+ } else {
+ return __intel_context_pin_ww(ce, ww);
+ }
+}
+
+void intel_context_unpin(struct intel_context *ce)
+{
+ if (intel_context_is_child(ce)) {
+ if (atomic_fetch_add(-1, &ce->pin_count) == 1)
+ __intel_context_unpin(ce->parent);
+ } else {
+ __intel_context_unpin(ce);
+ }
+}
+
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
#include "selftest_context.c"
#endif
diff --git a/drivers/gpu/drm/i915/gt/intel_context.h b/drivers/gpu/drm/i915/gt/intel_context.h
index ad6ce5ac4824..c208691fc87d 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.h
+++ b/drivers/gpu/drm/i915/gt/intel_context.h
@@ -110,31 +110,15 @@ static inline void intel_context_unlock_pinned(struct intel_context *ce)
mutex_unlock(&ce->pin_mutex);
}

-int __intel_context_do_pin(struct intel_context *ce);
-int __intel_context_do_pin_ww(struct intel_context *ce,
- struct i915_gem_ww_ctx *ww);
-
static inline bool intel_context_pin_if_active(struct intel_context *ce)
{
return atomic_inc_not_zero(&ce->pin_count);
}

-static inline int intel_context_pin(struct intel_context *ce)
-{
- if (likely(intel_context_pin_if_active(ce)))
- return 0;
-
- return __intel_context_do_pin(ce);
-}
-
-static inline int intel_context_pin_ww(struct intel_context *ce,
- struct i915_gem_ww_ctx *ww)
-{
- if (likely(intel_context_pin_if_active(ce)))
- return 0;
+int intel_context_pin(struct intel_context *ce);

- return __intel_context_do_pin_ww(ce, ww);
-}
+int intel_context_pin_ww(struct intel_context *ce,
+ struct i915_gem_ww_ctx *ww);

static inline void __intel_context_pin(struct intel_context *ce)
{
@@ -146,28 +130,11 @@ void __intel_context_do_unpin(struct intel_context *ce, int sub);

static inline void intel_context_sched_disable_unpin(struct intel_context *ce)
{
+ GEM_BUG_ON(intel_context_is_child(ce));
__intel_context_do_unpin(ce, 2);
}

-static inline void intel_context_unpin(struct intel_context *ce)
-{
- if (!ce->ops->sched_disable) {
- __intel_context_do_unpin(ce, 1);
- } else {
- /*
- * Move ownership of this pin to the scheduling disable which is
- * an async operation. When that operation completes the above
- * intel_context_sched_disable_unpin is called potentially
- * unpinning the context.
- */
- while (!atomic_add_unless(&ce->pin_count, -1, 1)) {
- if (atomic_cmpxchg(&ce->pin_count, 1, 2) == 1) {
- ce->ops->sched_disable(ce);
- break;
- }
- }
- }
-}
+void intel_context_unpin(struct intel_context *ce);

void intel_context_enter_engine(struct intel_context *ce);
void intel_context_exit_engine(struct intel_context *ce);
diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 66b22b370a72..eb82be15b7a2 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -39,8 +39,8 @@ struct intel_context_ops {

void (*ban)(struct intel_context *ce, struct i915_request *rq);

- int (*pre_pin)(struct intel_context *ce, struct i915_gem_ww_ctx *ww, void **vaddr);
- int (*pin)(struct intel_context *ce, void *vaddr);
+ int (*pre_pin)(struct intel_context *ce, struct i915_gem_ww_ctx *ww);
+ int (*pin)(struct intel_context *ce);
void (*unpin)(struct intel_context *ce);
void (*post_unpin)(struct intel_context *ce);

diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
index baa1797af1c8..fc74ca28f245 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -2554,16 +2554,17 @@ static void execlists_submit_request(struct i915_request *request)
static int
__execlists_context_pre_pin(struct intel_context *ce,
struct intel_engine_cs *engine,
- struct i915_gem_ww_ctx *ww, void **vaddr)
+ struct i915_gem_ww_ctx *ww)
{
int err;

- err = lrc_pre_pin(ce, engine, ww, vaddr);
+ err = lrc_pre_pin(ce, engine, ww);
if (err)
return err;

if (!__test_and_set_bit(CONTEXT_INIT_BIT, &ce->flags)) {
- lrc_init_state(ce, engine, *vaddr);
+ lrc_init_state(ce, engine, ce->lrc_reg_state -
+ LRC_STATE_OFFSET / sizeof(*ce->lrc_reg_state));

__i915_gem_object_flush_map(ce->state->obj, 0, engine->context_size);
}
@@ -2572,15 +2573,14 @@ __execlists_context_pre_pin(struct intel_context *ce,
}

static int execlists_context_pre_pin(struct intel_context *ce,
- struct i915_gem_ww_ctx *ww,
- void **vaddr)
+ struct i915_gem_ww_ctx *ww)
{
- return __execlists_context_pre_pin(ce, ce->engine, ww, vaddr);
+ return __execlists_context_pre_pin(ce, ce->engine, ww);
}

-static int execlists_context_pin(struct intel_context *ce, void *vaddr)
+static int execlists_context_pin(struct intel_context *ce)
{
- return lrc_pin(ce, ce->engine, vaddr);
+ return lrc_pin(ce, ce->engine);
}

static int execlists_context_alloc(struct intel_context *ce)
@@ -3570,20 +3570,19 @@ static int virtual_context_alloc(struct intel_context *ce)
}

static int virtual_context_pre_pin(struct intel_context *ce,
- struct i915_gem_ww_ctx *ww,
- void **vaddr)
+ struct i915_gem_ww_ctx *ww)
{
struct virtual_engine *ve = container_of(ce, typeof(*ve), context);

/* Note: we must use a real engine class for setting up reg state */
- return __execlists_context_pre_pin(ce, ve->siblings[0], ww, vaddr);
+ return __execlists_context_pre_pin(ce, ve->siblings[0], ww);
}

-static int virtual_context_pin(struct intel_context *ce, void *vaddr)
+static int virtual_context_pin(struct intel_context *ce)
{
struct virtual_engine *ve = container_of(ce, typeof(*ve), context);

- return lrc_pin(ce, ve->siblings[0], vaddr);
+ return lrc_pin(ce, ve->siblings[0]);
}

static void virtual_context_enter(struct intel_context *ce)
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index bb4af4977920..c466fc966005 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -947,30 +947,30 @@ void lrc_reset(struct intel_context *ce)
int
lrc_pre_pin(struct intel_context *ce,
struct intel_engine_cs *engine,
- struct i915_gem_ww_ctx *ww,
- void **vaddr)
+ struct i915_gem_ww_ctx *ww)
{
+ void *vaddr;
GEM_BUG_ON(!ce->state);
GEM_BUG_ON(!i915_vma_is_pinned(ce->state));

- *vaddr = i915_gem_object_pin_map(ce->state->obj,
- i915_coherent_map_type(ce->engine->i915,
- ce->state->obj,
- false) |
- I915_MAP_OVERRIDE);
+ vaddr = i915_gem_object_pin_map(ce->state->obj,
+ i915_coherent_map_type(ce->engine->i915,
+ ce->state->obj,
+ false) |
+ I915_MAP_OVERRIDE);

- return PTR_ERR_OR_ZERO(*vaddr);
+ ce->lrc_reg_state = vaddr + LRC_STATE_OFFSET;
+
+ return PTR_ERR_OR_ZERO(vaddr);
}

int
lrc_pin(struct intel_context *ce,
- struct intel_engine_cs *engine,
- void *vaddr)
+ struct intel_engine_cs *engine)
{
- ce->lrc_reg_state = vaddr + LRC_STATE_OFFSET;
-
if (!__test_and_set_bit(CONTEXT_INIT_BIT, &ce->flags))
- lrc_init_state(ce, engine, vaddr);
+ lrc_init_state(ce, engine,
+ (void *)ce->lrc_reg_state - LRC_STATE_OFFSET);

ce->lrc.lrca = lrc_update_regs(ce, engine, ce->ring->tail);
return 0;
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.h b/drivers/gpu/drm/i915/gt/intel_lrc.h
index 7f697845c4cf..837fcf00270d 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.h
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.h
@@ -38,12 +38,10 @@ void lrc_destroy(struct kref *kref);
int
lrc_pre_pin(struct intel_context *ce,
struct intel_engine_cs *engine,
- struct i915_gem_ww_ctx *ww,
- void **vaddr);
+ struct i915_gem_ww_ctx *ww);
int
lrc_pin(struct intel_context *ce,
- struct intel_engine_cs *engine,
- void *vaddr);
+ struct intel_engine_cs *engine);
void lrc_unpin(struct intel_context *ce);
void lrc_post_unpin(struct intel_context *ce);

diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
index 2958e2fae380..f4f301bfb9f7 100644
--- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
@@ -472,8 +472,7 @@ static int ring_context_init_default_state(struct intel_context *ce,
}

static int ring_context_pre_pin(struct intel_context *ce,
- struct i915_gem_ww_ctx *ww,
- void **unused)
+ struct i915_gem_ww_ctx *ww)
{
struct i915_address_space *vm;
int err = 0;
@@ -576,7 +575,7 @@ static int ring_context_alloc(struct intel_context *ce)
return 0;
}

-static int ring_context_pin(struct intel_context *ce, void *unused)
+static int ring_context_pin(struct intel_context *ce)
{
return 0;
}
diff --git a/drivers/gpu/drm/i915/gt/mock_engine.c b/drivers/gpu/drm/i915/gt/mock_engine.c
index 2c1af030310c..826b5d7a4573 100644
--- a/drivers/gpu/drm/i915/gt/mock_engine.c
+++ b/drivers/gpu/drm/i915/gt/mock_engine.c
@@ -167,12 +167,12 @@ static int mock_context_alloc(struct intel_context *ce)
}

static int mock_context_pre_pin(struct intel_context *ce,
- struct i915_gem_ww_ctx *ww, void **unused)
+ struct i915_gem_ww_ctx *ww)
{
return 0;
}

-static int mock_context_pin(struct intel_context *ce, void *unused)
+static int mock_context_pin(struct intel_context *ce)
{
return 0;
}
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
index dec757d319a2..c5c73c42bcf7 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1905,6 +1905,7 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)

GEM_BUG_ON(!engine->mask);
GEM_BUG_ON(context_guc_id_invalid(ce));
+ GEM_BUG_ON(intel_context_is_child(ce));

/*
* Ensure LRC + CT vmas are is same region as write barrier is done
@@ -2008,15 +2009,13 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)

static int __guc_context_pre_pin(struct intel_context *ce,
struct intel_engine_cs *engine,
- struct i915_gem_ww_ctx *ww,
- void **vaddr)
+ struct i915_gem_ww_ctx *ww)
{
- return lrc_pre_pin(ce, engine, ww, vaddr);
+ return lrc_pre_pin(ce, engine, ww);
}

static int __guc_context_pin(struct intel_context *ce,
- struct intel_engine_cs *engine,
- void *vaddr)
+ struct intel_engine_cs *engine)
{
if (i915_ggtt_offset(ce->state) !=
(ce->lrc.lrca & CTX_GTT_ADDRESS_MASK))
@@ -2027,20 +2026,33 @@ static int __guc_context_pin(struct intel_context *ce,
* explaination of why.
*/

- return lrc_pin(ce, engine, vaddr);
+ return lrc_pin(ce, engine);
+}
+
+static void __guc_context_unpin(struct intel_context *ce)
+{
+ lrc_unpin(ce);
+}
+
+static void __guc_context_post_unpin(struct intel_context *ce)
+{
+ lrc_post_unpin(ce);
}

static int guc_context_pre_pin(struct intel_context *ce,
- struct i915_gem_ww_ctx *ww,
- void **vaddr)
+ struct i915_gem_ww_ctx *ww)
{
- return __guc_context_pre_pin(ce, ce->engine, ww, vaddr);
+ return __guc_context_pre_pin(ce, ce->engine, ww);
}

-static int guc_context_pin(struct intel_context *ce, void *vaddr)
+static int guc_context_pin(struct intel_context *ce)
{
- int ret = __guc_context_pin(ce, ce->engine, vaddr);
+ int ret;

+ GEM_BUG_ON(intel_context_is_parent(ce) ||
+ intel_context_is_child(ce));
+
+ ret = __guc_context_pin(ce, ce->engine);
if (likely(!ret && !intel_context_is_barrier(ce)))
intel_engine_pm_get(ce->engine);

@@ -2054,7 +2066,7 @@ static void guc_context_unpin(struct intel_context *ce)
GEM_BUG_ON(context_enabled(ce));

unpin_guc_id(guc, ce, true);
- lrc_unpin(ce);
+ __guc_context_unpin(ce);

if (likely(!intel_context_is_barrier(ce)))
intel_engine_pm_put(ce->engine);
@@ -2062,7 +2074,141 @@ static void guc_context_unpin(struct intel_context *ce)

static void guc_context_post_unpin(struct intel_context *ce)
{
- lrc_post_unpin(ce);
+ __guc_context_post_unpin(ce);
+}
+
+/* Future patches will use this function */
+__maybe_unused
+static int guc_parent_context_pre_pin(struct intel_context *ce,
+ struct i915_gem_ww_ctx *ww)
+{
+ struct intel_context *child;
+ int err, i = 0, j = 0;
+
+ for_each_child(ce, child) {
+ err = i915_active_acquire(&child->active);
+ if (unlikely(err))
+ goto unwind_active;
+ ++i;
+ }
+
+ for_each_child(ce, child) {
+ err = __guc_context_pre_pin(child, child->engine, ww);
+ if (unlikely(err))
+ goto unwind_pre_pin;
+ ++j;
+ }
+
+ err = __guc_context_pre_pin(ce, ce->engine, ww);
+ if (unlikely(err))
+ goto unwind_pre_pin;
+
+ return 0;
+
+unwind_pre_pin:
+ for_each_child(ce, child) {
+ if (!j--)
+ break;
+ __guc_context_post_unpin(child);
+ }
+
+unwind_active:
+ for_each_child(ce, child) {
+ if (!i--)
+ break;
+ i915_active_release(&child->active);
+ }
+
+ return err;
+}
+
+/* Future patches will use this function */
+__maybe_unused
+static void guc_parent_context_post_unpin(struct intel_context *ce)
+{
+ struct intel_context *child;
+
+ for_each_child(ce, child)
+ __guc_context_post_unpin(child);
+ __guc_context_post_unpin(ce);
+
+ for_each_child(ce, child) {
+ intel_context_get(child);
+ i915_active_release(&child->active);
+ intel_context_put(child);
+ }
+}
+
+/* Future patches will use this function */
+__maybe_unused
+static int guc_parent_context_pin(struct intel_context *ce)
+{
+ int ret, i = 0, j = 0;
+ struct intel_context *child;
+ struct intel_engine_cs *engine;
+ intel_engine_mask_t tmp;
+
+ GEM_BUG_ON(!intel_context_is_parent(ce));
+
+ for_each_child(ce, child) {
+ ret = __guc_context_pin(child, child->engine);
+ if (unlikely(ret))
+ goto unwind_pin;
+ ++i;
+ }
+ ret = __guc_context_pin(ce, ce->engine);
+ if (unlikely(ret))
+ goto unwind_pin;
+
+ for_each_child(ce, child)
+ if (test_bit(CONTEXT_LRCA_DIRTY, &child->flags)) {
+ set_bit(CONTEXT_LRCA_DIRTY, &ce->flags);
+ break;
+ }
+
+ for_each_engine_masked(engine, ce->engine->gt,
+ ce->engine->mask, tmp)
+ intel_engine_pm_get(engine);
+ for_each_child(ce, child)
+ for_each_engine_masked(engine, child->engine->gt,
+ child->engine->mask, tmp)
+ intel_engine_pm_get(engine);
+
+ return 0;
+
+unwind_pin:
+ for_each_child(ce, child) {
+ if (++j > i)
+ break;
+ __guc_context_unpin(child);
+ }
+
+ return ret;
+}
+
+/* Future patches will use this function */
+__maybe_unused
+static void guc_parent_context_unpin(struct intel_context *ce)
+{
+ struct intel_context *child;
+ struct intel_engine_cs *engine;
+ intel_engine_mask_t tmp;
+
+ GEM_BUG_ON(!intel_context_is_parent(ce));
+ GEM_BUG_ON(context_enabled(ce));
+
+ unpin_guc_id(ce_to_guc(ce), ce, true);
+ for_each_child(ce, child)
+ __guc_context_unpin(child);
+ __guc_context_unpin(ce);
+
+ for_each_engine_masked(engine, ce->engine->gt,
+ ce->engine->mask, tmp)
+ intel_engine_pm_put(engine);
+ for_each_child(ce, child)
+ for_each_engine_masked(engine, child->engine->gt,
+ child->engine->mask, tmp)
+ intel_engine_pm_put(engine);
}

static void __guc_context_sched_enable(struct intel_guc *guc,
@@ -2993,18 +3139,17 @@ static int guc_request_alloc(struct i915_request *rq)
}

static int guc_virtual_context_pre_pin(struct intel_context *ce,
- struct i915_gem_ww_ctx *ww,
- void **vaddr)
+ struct i915_gem_ww_ctx *ww)
{
struct intel_engine_cs *engine = guc_virtual_get_sibling(ce->engine, 0);

- return __guc_context_pre_pin(ce, engine, ww, vaddr);
+ return __guc_context_pre_pin(ce, engine, ww);
}

-static int guc_virtual_context_pin(struct intel_context *ce, void *vaddr)
+static int guc_virtual_context_pin(struct intel_context *ce)
{
struct intel_engine_cs *engine = guc_virtual_get_sibling(ce->engine, 0);
- int ret = __guc_context_pin(ce, engine, vaddr);
+ int ret = __guc_context_pin(ce, engine);
intel_engine_mask_t tmp, mask = ce->engine->mask;

if (likely(!ret))
@@ -3024,7 +3169,7 @@ static void guc_virtual_context_unpin(struct intel_context *ce)
GEM_BUG_ON(intel_context_is_barrier(ce));

unpin_guc_id(guc, ce, true);
- lrc_unpin(ce);
+ __guc_context_unpin(ce);

for_each_engine_masked(engine, ce->engine->gt, mask, tmp)
intel_engine_pm_put(engine);
--
2.28.0