Invokes the pipelined page migration through blt, for i915_ttm_move requests of eviction and also obj clear.
v2: - subfunction for accel_move (Thomas) - engine_pm_get/put around context_move/clear (Thomas) - Invalidation at accel_clear (Thomas)
v3: - Timeout is set for MAX_SCHEDULE_TIMEOUT (Thomas) - s/TTM_PL_PRIV/I915_PL_LMEM0 (Thomas)
Signed-off-by: Ramalingam C ramalingam.c@intel.com Reviewed-by: Thomas Hellström thomas.hellstrom@linux.intel.com --- drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 88 +++++++++++++++++++++---- 1 file changed, 75 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c index 3748098b42d5..94571757fb42 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c @@ -15,6 +15,9 @@ #include "gem/i915_gem_ttm.h" #include "gem/i915_gem_mman.h"
+#include "gt/intel_migrate.h" +#include "gt/intel_engine_pm.h" + #define I915_PL_LMEM0 TTM_PL_PRIV #define I915_PL_SYSTEM TTM_PL_SYSTEM #define I915_PL_STOLEN TTM_PL_VRAM @@ -282,6 +285,62 @@ i915_ttm_resource_get_st(struct drm_i915_gem_object *obj, return intel_region_ttm_node_to_st(obj->mm.region, res->mm_node); }
+static int i915_ttm_accel_move(struct ttm_buffer_object *bo, + struct ttm_resource *dst_mem, + struct sg_table *dst_st) +{ + struct drm_i915_private *i915 = container_of(bo->bdev, typeof(*i915), + bdev); + struct ttm_resource_manager *src_man = + ttm_manager_type(bo->bdev, bo->mem.mem_type); + struct drm_i915_gem_object *obj = i915_ttm_to_gem(bo); + struct sg_table *src_st; + struct i915_request *rq; + int ret; + + if (!i915->gt.migrate.context) + return -EINVAL; + + if (!bo->ttm || !ttm_tt_is_populated(bo->ttm)) { + if (bo->type == ttm_bo_type_kernel) + return -EINVAL; + + if (bo->ttm && + !(bo->ttm->page_flags & TTM_PAGE_FLAG_ZERO_ALLOC)) + return 0; + + intel_engine_pm_get(i915->gt.migrate.context->engine); + ret = intel_context_migrate_clear(i915->gt.migrate.context, NULL, + dst_st->sgl, I915_CACHE_NONE, + dst_mem->mem_type >= I915_PL_LMEM0, + 0, &rq); + + if (!ret && rq) { + i915_request_wait(rq, 0, MAX_SCHEDULE_TIMEOUT); + i915_request_put(rq); + } + intel_engine_pm_put(i915->gt.migrate.context->engine); + } else { + src_st = src_man->use_tt ? i915_ttm_tt_get_st(bo->ttm) : + obj->ttm.cached_io_st; + + intel_engine_pm_get(i915->gt.migrate.context->engine); + ret = intel_context_migrate_copy(i915->gt.migrate.context, + NULL, src_st->sgl, I915_CACHE_NONE, + bo->mem.mem_type >= I915_PL_LMEM0, + dst_st->sgl, I915_CACHE_NONE, + dst_mem->mem_type >= I915_PL_LMEM0, + &rq); + if (!ret && rq) { + i915_request_wait(rq, 0, MAX_SCHEDULE_TIMEOUT); + i915_request_put(rq); + } + intel_engine_pm_put(i915->gt.migrate.context->engine); + } + + return ret; +} + static int i915_ttm_move(struct ttm_buffer_object *bo, bool evict, struct ttm_operation_ctx *ctx, struct ttm_resource *dst_mem, @@ -332,19 +391,22 @@ static int i915_ttm_move(struct ttm_buffer_object *bo, bool evict, if (IS_ERR(dst_st)) return PTR_ERR(dst_st);
- /* If we start mapping GGTT, we can no longer use man::use_tt here. */ - dst_iter = dst_man->use_tt ? - ttm_kmap_iter_tt_init(&_dst_iter.tt, bo->ttm) : - ttm_kmap_iter_iomap_init(&_dst_iter.io, &dst_reg->iomap, - dst_st, dst_reg->region.start); - - src_iter = src_man->use_tt ? - ttm_kmap_iter_tt_init(&_src_iter.tt, bo->ttm) : - ttm_kmap_iter_iomap_init(&_src_iter.io, &src_reg->iomap, - obj->ttm.cached_io_st, - src_reg->region.start); - - ttm_move_memcpy(bo, dst_mem->num_pages, dst_iter, src_iter); + ret = i915_ttm_accel_move(bo, dst_mem, dst_st); + if (ret) { + /* If we start mapping GGTT, we can no longer use man::use_tt here. */ + dst_iter = dst_man->use_tt ? + ttm_kmap_iter_tt_init(&_dst_iter.tt, bo->ttm) : + ttm_kmap_iter_iomap_init(&_dst_iter.io, &dst_reg->iomap, + dst_st, dst_reg->region.start); + + src_iter = src_man->use_tt ? + ttm_kmap_iter_tt_init(&_src_iter.tt, bo->ttm) : + ttm_kmap_iter_iomap_init(&_src_iter.io, &src_reg->iomap, + obj->ttm.cached_io_st, + src_reg->region.start); + + ttm_move_memcpy(bo, dst_mem->num_pages, dst_iter, src_iter); + } ttm_bo_move_sync_cleanup(bo, dst_mem); i915_ttm_free_cached_io_st(obj);