[PATCH i-g-t v2 51/66] lib/intel_batchbuffer: Add support for long-running mode execution
Christoph Manszewski
christoph.manszewski at intel.com
Tue Jul 30 11:45:08 UTC 2024
From: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
To execute in lr (long-running) mode, apart from setting
'DRM_XE_VM_CREATE_FLAG_LR_MODE' flag during vm creation, it is required
to use 'DRM_XE_SYNC_TYPE_USER_FENCE' syncs with vm_bind and xe_exec
ioctls.
Make it possible to execute batch buffers via intel_bb_exec() in lr mode
by setting the 'lr_mode' field with the supplied setter.
Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
Signed-off-by: Christoph Manszewski <christoph.manszewski at intel.com>
---
lib/intel_batchbuffer.c | 153 ++++++++++++++++++++++++++++++++++++++--
lib/intel_batchbuffer.h | 17 +++++
2 files changed, 165 insertions(+), 5 deletions(-)
diff --git a/lib/intel_batchbuffer.c b/lib/intel_batchbuffer.c
index 824e92831..43bf5b04b 100644
--- a/lib/intel_batchbuffer.c
+++ b/lib/intel_batchbuffer.c
@@ -992,6 +992,7 @@ __intel_bb_create(int fd, uint32_t ctx, uint32_t vm, const intel_ctx_cfg_t *cfg,
igt_assert(ibb->batch);
ibb->ptr = ibb->batch;
ibb->fence = -1;
+ ibb->user_fence_offset = -1;
/* Cache context configuration */
if (cfg) {
@@ -1455,7 +1456,7 @@ int intel_bb_sync(struct intel_bb *ibb)
{
int ret;
- if (ibb->fence < 0 && !ibb->engine_syncobj)
+ if (ibb->fence < 0 && !ibb->engine_syncobj && ibb->user_fence_offset < 0)
return 0;
if (ibb->fence >= 0) {
@@ -1464,10 +1465,28 @@ int intel_bb_sync(struct intel_bb *ibb)
close(ibb->fence);
ibb->fence = -1;
}
- } else {
- igt_assert_neq(ibb->engine_syncobj, 0);
+ } else if(ibb->engine_syncobj) {
ret = syncobj_wait_err(ibb->fd, &ibb->engine_syncobj,
1, INT64_MAX, 0);
+ } else {
+ int64_t timeout = -1;
+ uint64_t *sync_data;
+ void *map;
+
+ igt_assert(ibb->user_fence_offset >= 0);
+
+ map = xe_bo_map(ibb->fd, ibb->handle, ibb->size);
+ sync_data = (void*)((uint8_t *)map + ibb->user_fence_offset);
+
+ ret = __xe_wait_ufence(ibb->fd, sync_data, ibb->user_fence_value,
+ ibb->ctx ?: ibb->engine_id, &timeout);
+
+ gem_munmap(map, ibb->size);
+ ibb->user_fence_offset = -1;
+
+ /* Workload finished forcibly, but finished none the less */
+ if (ret == -EIO)
+ ret = 0;
}
return ret;
@@ -2441,6 +2460,126 @@ __xe_bb_exec(struct intel_bb *ibb, uint64_t flags, bool sync)
return 0;
}
+static int
+__xe_lr_bb_exec(struct intel_bb *ibb, uint64_t flags, bool sync)
+{
+ uint32_t engine = flags & (I915_EXEC_BSD_MASK | I915_EXEC_RING_MASK);
+ uint32_t engine_id;
+#define USER_FENCE_VALUE 0xdeadbeefdeadbeefull
+ /*
+ * LR mode vm_bind requires to use DRM_XE_SYNC_TYPE_USER_FENCE type sync
+ * LR mode xe_exec requires to use DRM_XE_SYNC_TYPE_USER_FENCE type sync
+ */
+ struct drm_xe_sync syncs[2] = {
+ { .type = DRM_XE_SYNC_TYPE_USER_FENCE,
+ .flags = DRM_XE_SYNC_FLAG_SIGNAL,
+ .timeline_value = USER_FENCE_VALUE
+ },
+ { .type = DRM_XE_SYNC_TYPE_USER_FENCE,
+ .flags = DRM_XE_SYNC_FLAG_SIGNAL,
+ .timeline_value = USER_FENCE_VALUE
+ },
+ };
+ struct drm_xe_vm_bind_op *bind_ops;
+ struct {
+ uint64_t vm_sync;
+ uint64_t exec_sync;
+ } *sync_data;
+ uint32_t sync_offset;
+ uint64_t ibb_addr, vm_sync_addr, exec_sync_addr;
+ void *map;
+
+ igt_assert_eq(ibb->num_relocs, 0);
+ igt_assert_eq(ibb->xe_bound, false);
+
+ if (ibb->ctx) {
+ engine_id = ibb->ctx;
+ } else if (ibb->last_engine != engine) {
+ struct drm_xe_engine_class_instance inst = { };
+
+ inst.engine_instance =
+ (flags & I915_EXEC_BSD_MASK) >> I915_EXEC_BSD_SHIFT;
+
+ switch (flags & I915_EXEC_RING_MASK) {
+ case I915_EXEC_DEFAULT:
+ case I915_EXEC_BLT:
+ inst.engine_class = DRM_XE_ENGINE_CLASS_COPY;
+ break;
+ case I915_EXEC_BSD:
+ inst.engine_class = DRM_XE_ENGINE_CLASS_VIDEO_DECODE;
+ break;
+ case I915_EXEC_RENDER:
+ if (xe_has_engine_class(ibb->fd, DRM_XE_ENGINE_CLASS_RENDER))
+ inst.engine_class = DRM_XE_ENGINE_CLASS_RENDER;
+ else
+ inst.engine_class = DRM_XE_ENGINE_CLASS_COMPUTE;
+ break;
+ case I915_EXEC_VEBOX:
+ inst.engine_class = DRM_XE_ENGINE_CLASS_VIDEO_ENHANCE;
+ break;
+ default:
+ igt_assert_f(false, "Unknown engine: %x", (uint32_t) flags);
+ }
+ igt_debug("Run on %s\n", xe_engine_class_string(inst.engine_class));
+
+ if (ibb->engine_id)
+ xe_exec_queue_destroy(ibb->fd, ibb->engine_id);
+
+ ibb->engine_id = engine_id =
+ xe_exec_queue_create(ibb->fd, ibb->vm_id, &inst, 0);
+ } else {
+ engine_id = ibb->engine_id;
+ }
+ ibb->last_engine = engine;
+
+ /* User fence add for sync: sync.addr has a quadword align limitation */
+ intel_bb_ptr_align(ibb, 8);
+ sync_offset = intel_bb_offset(ibb);
+ intel_bb_ptr_add(ibb, sizeof(*sync_data));
+
+ map = xe_bo_map(ibb->fd, ibb->handle, ibb->size);
+ memcpy(map, ibb->batch, ibb->size);
+
+ sync_data = (void*)((uint8_t *)map + sync_offset);
+ /* vm_sync userfence userspace address. */
+ vm_sync_addr = to_user_pointer(&sync_data->vm_sync);
+ ibb_addr = ibb->batch_offset;
+ /* exec_sync userfence ppgtt address. */
+ exec_sync_addr = ibb_addr + sync_offset + sizeof(uint64_t);
+ syncs[0].addr = vm_sync_addr;
+ syncs[1].addr = exec_sync_addr;
+
+ if (ibb->num_objects > 1) {
+ bind_ops = xe_alloc_bind_ops(ibb, DRM_XE_VM_BIND_OP_MAP, 0, 0);
+ xe_vm_bind_array(ibb->fd, ibb->vm_id, 0, bind_ops,
+ ibb->num_objects, syncs, 1);
+ free(bind_ops);
+ } else {
+ igt_debug("bind: MAP\n");
+ igt_debug(" handle: %u, offset: %llx, size: %llx\n",
+ ibb->handle, (long long)ibb->batch_offset,
+ (long long)ibb->size);
+ xe_vm_bind_async(ibb->fd, ibb->vm_id, 0, ibb->handle, 0,
+ ibb->batch_offset, ibb->size, syncs, 1);
+ }
+
+ /* use default vm_bind_exec_queue */
+ xe_wait_ufence(ibb->fd, &sync_data->vm_sync, USER_FENCE_VALUE, 0, -1);
+ gem_munmap(map, ibb->size);
+
+ ibb->xe_bound = true;
+ ibb->user_fence_value = USER_FENCE_VALUE;
+ ibb->user_fence_offset = sync_offset + sizeof(uint64_t);
+
+ xe_exec_sync(ibb->fd, engine_id, ibb->batch_offset, &syncs[1], 1);
+
+ if (sync)
+ intel_bb_sync(ibb);
+
+ return 0;
+}
+
+
/*
* __intel_bb_exec:
* @ibb: pointer to intel_bb
@@ -2541,8 +2680,12 @@ void intel_bb_exec(struct intel_bb *ibb, uint32_t end_offset,
if (ibb->driver == INTEL_DRIVER_I915)
igt_assert_eq(__intel_bb_exec(ibb, end_offset, flags, sync), 0);
- else
- igt_assert_eq(__xe_bb_exec(ibb, flags, sync), 0);
+ else {
+ if (intel_bb_get_lr_mode(ibb))
+ igt_assert_eq(__xe_lr_bb_exec(ibb, flags, sync), 0);
+ else
+ igt_assert_eq(__xe_bb_exec(ibb, flags, sync), 0);
+ }
}
/**
diff --git a/lib/intel_batchbuffer.h b/lib/intel_batchbuffer.h
index 7caf6c518..051c336de 100644
--- a/lib/intel_batchbuffer.h
+++ b/lib/intel_batchbuffer.h
@@ -303,6 +303,11 @@ struct intel_bb {
* is not thread-safe.
*/
int32_t refcount;
+
+ /* long running mode */
+ bool lr_mode;
+ int64_t user_fence_offset;
+ uint64_t user_fence_value;
};
struct intel_bb *
@@ -421,6 +426,18 @@ static inline uint32_t intel_bb_pxp_appid(struct intel_bb *ibb)
return ibb->pxp.appid;
}
+static inline void intel_bb_set_lr_mode(struct intel_bb *ibb, bool lr_mode)
+{
+ igt_assert(ibb);
+ ibb->lr_mode = lr_mode;
+}
+
+static inline bool intel_bb_get_lr_mode(struct intel_bb *ibb)
+{
+ igt_assert(ibb);
+ return ibb->lr_mode;
+}
+
struct drm_i915_gem_exec_object2 *
intel_bb_add_object(struct intel_bb *ibb, uint32_t handle, uint64_t size,
uint64_t offset, uint64_t alignment, bool write);
--
2.34.1
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