From: Chris Wilson chris@chris-wilson.co.uk
Allow internal clients to create a pinned context.
v2 (Daniele): export destructor as well, allow optional usage of custom vm for maximum flexibility.
Signed-off-by: Chris Wilson chris@chris-wilson.co.uk Signed-off-by: Daniele Ceraolo Spurio daniele.ceraolospurio@intel.com --- drivers/gpu/drm/i915/gt/intel_engine.h | 10 ++++++++ drivers/gpu/drm/i915/gt/intel_engine_cs.c | 29 +++++++++++++++-------- 2 files changed, 29 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine.h b/drivers/gpu/drm/i915/gt/intel_engine.h index 47ee8578e511..a64d28aba257 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine.h +++ b/drivers/gpu/drm/i915/gt/intel_engine.h @@ -18,7 +18,9 @@ #include "intel_workarounds.h"
struct drm_printer; +struct intel_context; struct intel_gt; +struct lock_class_key;
/* Early gen2 devices have a cacheline of just 32 bytes, using 64 is overkill, * but keeps the logic simple. Indeed, the whole purpose of this macro is just @@ -255,6 +257,14 @@ struct i915_request * intel_engine_find_active_request(struct intel_engine_cs *engine);
u32 intel_engine_context_size(struct intel_gt *gt, u8 class); +struct intel_context * +intel_engine_create_pinned_context(struct intel_engine_cs *engine, + struct i915_address_space *vm, + unsigned int ring_size, + unsigned int hwsp, + struct lock_class_key *key, + const char *name); +void intel_engine_destroy_pinned_context(struct intel_context *ce);
void intel_engine_init_active(struct intel_engine_cs *engine, unsigned int subclass); diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c index eba2da9679a5..8cbf11497e8e 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c @@ -801,11 +801,13 @@ intel_engine_init_active(struct intel_engine_cs *engine, unsigned int subclass) #endif }
-static struct intel_context * -create_pinned_context(struct intel_engine_cs *engine, - unsigned int hwsp, - struct lock_class_key *key, - const char *name) +struct intel_context * +intel_engine_create_pinned_context(struct intel_engine_cs *engine, + struct i915_address_space *vm, + unsigned int ring_size, + unsigned int hwsp, + struct lock_class_key *key, + const char *name) { struct intel_context *ce; int err; @@ -816,6 +818,12 @@ create_pinned_context(struct intel_engine_cs *engine,
__set_bit(CONTEXT_BARRIER_BIT, &ce->flags); ce->timeline = page_pack_bits(NULL, hwsp); + ce->ring = __intel_context_ring_size(ring_size); + + if (vm) { + i915_vm_put(ce->vm); + ce->vm = i915_vm_get(vm); + }
err = intel_context_pin(ce); /* perma-pin so it is always available */ if (err) { @@ -834,7 +842,7 @@ create_pinned_context(struct intel_engine_cs *engine, return ce; }
-static void destroy_pinned_context(struct intel_context *ce) +void intel_engine_destroy_pinned_context(struct intel_context *ce) { struct intel_engine_cs *engine = ce->engine; struct i915_vma *hwsp = engine->status_page.vma; @@ -854,8 +862,9 @@ create_kernel_context(struct intel_engine_cs *engine) { static struct lock_class_key kernel;
- return create_pinned_context(engine, I915_GEM_HWS_SEQNO_ADDR, - &kernel, "kernel_context"); + return intel_engine_create_pinned_context(engine, NULL, SZ_4K, + I915_GEM_HWS_SEQNO_ADDR, + &kernel, "kernel_context"); }
/** @@ -898,7 +907,7 @@ static int engine_init_common(struct intel_engine_cs *engine) return 0;
err_context: - destroy_pinned_context(ce); + intel_engine_destroy_pinned_context(ce); return ret; }
@@ -956,7 +965,7 @@ void intel_engine_cleanup_common(struct intel_engine_cs *engine) fput(engine->default_state);
if (engine->kernel_context) - destroy_pinned_context(engine->kernel_context); + intel_engine_destroy_pinned_context(engine->kernel_context);
GEM_BUG_ON(!llist_empty(&engine->barrier_tasks)); cleanup_status_page(engine);