diff options
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_migrate.c | 164 |
1 files changed, 160 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c index 5f6341f91622..84877ca95ce2 100644 --- a/drivers/gpu/drm/i915/gt/intel_migrate.c +++ b/drivers/gpu/drm/i915/gt/intel_migrate.c @@ -657,6 +657,65 @@ static int emit_copy(struct i915_request *rq, return 0; } +static int scatter_list_length(struct scatterlist *sg) +{ + int len = 0; + + while (sg && sg_dma_len(sg)) { + len += sg_dma_len(sg); + sg = sg_next(sg); + }; + + return len; +} + +static void +calculate_chunk_sz(struct drm_i915_private *i915, bool src_is_lmem, + int *src_sz, int *ccs_sz, u32 bytes_to_cpy, + u32 ccs_bytes_to_cpy) +{ + if (ccs_bytes_to_cpy) { + /* + * We can only copy the ccs data corresponding to + * the CHUNK_SZ of lmem which is + * GET_CCS_BYTES(i915, CHUNK_SZ)) + */ + *ccs_sz = min_t(int, ccs_bytes_to_cpy, GET_CCS_BYTES(i915, CHUNK_SZ)); + + if (!src_is_lmem) + /* + * When CHUNK_SZ is passed all the pages upto CHUNK_SZ + * will be taken for the blt. in Flat-ccs supported + * platform Smem obj will have more pages than required + * for main meory hence limit it to the required size + * for main memory + */ + *src_sz = min_t(int, bytes_to_cpy, CHUNK_SZ); + } else { /* ccs handling is not required */ + *src_sz = CHUNK_SZ; + } +} + +static void get_ccs_sg_sgt(struct sgt_dma *it, u32 bytes_to_cpy) +{ + u32 len; + + do { + GEM_BUG_ON(!it->sg || !sg_dma_len(it->sg)); + len = it->max - it->dma; + if (len > bytes_to_cpy) { + it->dma += bytes_to_cpy; + break; + } + + bytes_to_cpy -= len; + + it->sg = __sg_next(it->sg); + it->dma = sg_dma_address(it->sg); + it->max = it->dma + sg_dma_len(it->sg); + } while (bytes_to_cpy); +} + int intel_context_migrate_copy(struct intel_context *ce, const struct i915_deps *deps, @@ -668,9 +727,15 @@ intel_context_migrate_copy(struct intel_context *ce, bool dst_is_lmem, struct i915_request **out) { - struct sgt_dma it_src = sg_sgt(src), it_dst = sg_sgt(dst); + struct sgt_dma it_src = sg_sgt(src), it_dst = sg_sgt(dst), it_ccs; + struct drm_i915_private *i915 = ce->engine->i915; + u32 ccs_bytes_to_cpy = 0, bytes_to_cpy; + enum i915_cache_level ccs_cache_level; + int src_sz, dst_sz, ccs_sz; u32 src_offset, dst_offset; + u8 src_access, dst_access; struct i915_request *rq; + bool ccs_is_src; int err; GEM_BUG_ON(ce->vm != ce->engine->gt->migrate.context->vm); @@ -678,6 +743,38 @@ intel_context_migrate_copy(struct intel_context *ce, GEM_BUG_ON(ce->ring->size < SZ_64K); + src_sz = scatter_list_length(src); + bytes_to_cpy = src_sz; + + if (HAS_FLAT_CCS(i915) && src_is_lmem ^ dst_is_lmem) { + src_access = !src_is_lmem && dst_is_lmem; + dst_access = !src_access; + + dst_sz = scatter_list_length(dst); + if (src_is_lmem) { + it_ccs = it_dst; + ccs_cache_level = dst_cache_level; + ccs_is_src = false; + } else if (dst_is_lmem) { + bytes_to_cpy = dst_sz; + it_ccs = it_src; + ccs_cache_level = src_cache_level; + ccs_is_src = true; + } + + /* + * When there is a eviction of ccs needed smem will have the + * extra pages for the ccs data + * + * TO-DO: Want to move the size mismatch check to a WARN_ON, + * but still we have some requests of smem->lmem with same size. + * Need to fix it. + */ + ccs_bytes_to_cpy = src_sz != dst_sz ? GET_CCS_BYTES(i915, bytes_to_cpy) : 0; + if (ccs_bytes_to_cpy) + get_ccs_sg_sgt(&it_ccs, bytes_to_cpy); + } + src_offset = 0; dst_offset = CHUNK_SZ; if (HAS_64K_PAGES(ce->engine->i915)) { @@ -719,8 +816,11 @@ intel_context_migrate_copy(struct intel_context *ce, if (err) goto out_rq; + calculate_chunk_sz(i915, src_is_lmem, &src_sz, &ccs_sz, + bytes_to_cpy, ccs_bytes_to_cpy); + len = emit_pte(rq, &it_src, src_cache_level, src_is_lmem, - src_offset, CHUNK_SZ); + src_offset, src_sz); if (len <= 0) { err = len; goto out_rq; @@ -737,7 +837,46 @@ intel_context_migrate_copy(struct intel_context *ce, if (err) goto out_rq; - err = emit_copy(rq, dst_offset, src_offset, len); + err = emit_copy(rq, dst_offset, src_offset, len); + if (err) + goto out_rq; + + bytes_to_cpy -= len; + + if (ccs_bytes_to_cpy) { + err = rq->engine->emit_flush(rq, EMIT_INVALIDATE); + if (err) + goto out_rq; + + err = emit_pte(rq, &it_ccs, ccs_cache_level, false, + ccs_is_src ? src_offset : dst_offset, + ccs_sz); + + err = rq->engine->emit_flush(rq, EMIT_INVALIDATE); + if (err) + goto out_rq; + + /* + * Using max of src_sz and dst_sz, as we need to + * pass the lmem size corresponding to the ccs + * blocks we need to handle. + */ + ccs_sz = max_t(int, ccs_is_src ? ccs_sz : src_sz, + ccs_is_src ? dst_sz : ccs_sz); + + err = emit_copy_ccs(rq, dst_offset, dst_access, + src_offset, src_access, ccs_sz); + if (err) + goto out_rq; + + err = rq->engine->emit_flush(rq, EMIT_INVALIDATE); + if (err) + goto out_rq; + + /* Converting back to ccs bytes */ + ccs_sz = GET_CCS_BYTES(rq->engine->i915, ccs_sz); + ccs_bytes_to_cpy -= ccs_sz; + } /* Arbitration is re-enabled between requests. */ out_rq: @@ -745,9 +884,26 @@ out_rq: i915_request_put(*out); *out = i915_request_get(rq); i915_request_add(rq); - if (err || !it_src.sg || !sg_dma_len(it_src.sg)) + + if (err) break; + if (!bytes_to_cpy && !ccs_bytes_to_cpy) { + if (src_is_lmem) + WARN_ON(it_src.sg && sg_dma_len(it_src.sg)); + else + WARN_ON(it_dst.sg && sg_dma_len(it_dst.sg)); + break; + } + + if (WARN_ON(!it_src.sg || !sg_dma_len(it_src.sg) || + !it_dst.sg || !sg_dma_len(it_dst.sg) || + (ccs_bytes_to_cpy && (!it_ccs.sg || + !sg_dma_len(it_ccs.sg))))) { + err = -EINVAL; + break; + } + cond_resched(); } while (1); |