From patchwork Thu Jun 4 10:37:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 11587761 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AD0A3618 for ; Thu, 4 Jun 2020 10:38:23 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 958A120738 for ; Thu, 4 Jun 2020 10:38:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 958A120738 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=chris-wilson.co.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 97C936E32A; Thu, 4 Jun 2020 10:38:14 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from fireflyinternet.com (mail.fireflyinternet.com [109.228.58.192]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4DE3B89A86 for ; Thu, 4 Jun 2020 10:38:05 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from build.alporthouse.com (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 21393764-1500050 for multiple; Thu, 04 Jun 2020 11:37:57 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Thu, 4 Jun 2020 11:37:47 +0100 Message-Id: <20200604103751.18816-18-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200604103751.18816-1-chris@chris-wilson.co.uk> References: <20200604103751.18816-1-chris@chris-wilson.co.uk> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 18/22] drm/i915/gem: Build the reloc request first X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Chris Wilson Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" If we get interrupted in the middle of chaining up the relocation entries, we will fail to submit the relocation batch. However, we will report having already completed some of the relocations, and so the reloc.presumed_offset will no longer match the batch contents, causing confusion and invalid future batches. If we build the relocation request packet first, we can always emit as far as we get up in the relocation chain. Fixes: 0e97fbb08055 ("drm/i915/gem: Use a single chained reloc batches for a single execbuf") Signed-off-by: Chris Wilson --- .../gpu/drm/i915/gem/i915_gem_execbuffer.c | 51 ++++++++++--------- .../i915/gem/selftests/i915_gem_execbuffer.c | 8 +-- 2 files changed, 31 insertions(+), 28 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c index 06e1a1f2aa1d..4c3461ab8a63 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c @@ -1021,11 +1021,27 @@ static unsigned int reloc_bb_flags(const struct reloc_cache *cache) return cache->gen > 5 ? 0 : I915_DISPATCH_SECURE; } -static int reloc_gpu_flush(struct reloc_cache *cache) +static int reloc_gpu_emit(struct reloc_cache *cache) { struct i915_request *rq = cache->rq; int err; + err = 0; + if (rq->engine->emit_init_breadcrumb) + err = rq->engine->emit_init_breadcrumb(rq); + if (!err) + err = rq->engine->emit_bb_start(rq, + rq->batch->node.start, + PAGE_SIZE, + reloc_bb_flags(cache)); + + return err; +} + +static void reloc_gpu_flush(struct reloc_cache *cache) +{ + struct i915_request *rq = cache->rq; + if (cache->rq_vma) { struct drm_i915_gem_object *obj = cache->rq_vma->obj; @@ -1037,21 +1053,8 @@ static int reloc_gpu_flush(struct reloc_cache *cache) i915_gem_object_unpin_map(obj); } - err = 0; - if (rq->engine->emit_init_breadcrumb) - err = rq->engine->emit_init_breadcrumb(rq); - if (!err) - err = rq->engine->emit_bb_start(rq, - rq->batch->node.start, - PAGE_SIZE, - reloc_bb_flags(cache)); - if (err) - i915_request_set_error_once(rq, err); - intel_gt_chipset_flush(rq->engine->gt); i915_request_add(rq); - - return err; } static int reloc_move_to_gpu(struct i915_request *rq, struct i915_vma *vma) @@ -1139,7 +1142,7 @@ __reloc_gpu_alloc(struct i915_execbuffer *eb, struct intel_engine_cs *engine) err = i915_vma_move_to_active(batch, rq, 0); i915_vma_unlock(batch); if (err) - goto skip_request; + goto err_request; rq->batch = batch; i915_vma_unpin(batch); @@ -1152,8 +1155,6 @@ __reloc_gpu_alloc(struct i915_execbuffer *eb, struct intel_engine_cs *engine) /* Return with batch mapping (cmd) still pinned */ goto out_pool; -skip_request: - i915_request_set_error_once(rq, err); err_request: i915_request_add(rq); err_unpin: @@ -1186,10 +1187,8 @@ static u32 *reloc_batch_grow(struct i915_execbuffer *eb, if (unlikely(cache->rq_size + len > PAGE_SIZE / sizeof(u32) - RELOC_TAIL)) { err = reloc_gpu_chain(cache); - if (unlikely(err)) { - i915_request_set_error_once(cache->rq, err); + if (unlikely(err)) return ERR_PTR(err); - } } GEM_BUG_ON(cache->rq_size + len >= PAGE_SIZE / sizeof(u32)); @@ -1571,23 +1570,25 @@ static int reloc_gpu_alloc(struct i915_execbuffer *eb) static int reloc_gpu(struct i915_execbuffer *eb) { struct eb_vma *ev; - int flush, err; + int err; err = reloc_gpu_alloc(eb); if (err) return err; GEM_BUG_ON(!eb->reloc_cache.rq); + err = reloc_gpu_emit(&eb->reloc_cache); + if (err) + goto out; + list_for_each_entry(ev, &eb->relocs, reloc_link) { err = eb_relocate_vma(eb, ev); if (err) - goto out; + break; } out: - flush = reloc_gpu_flush(&eb->reloc_cache); - if (!err) - err = flush; + reloc_gpu_flush(&eb->reloc_cache); return err; } diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_execbuffer.c index 50fe22d87ae1..faed6480a792 100644 --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_execbuffer.c @@ -40,6 +40,10 @@ static int __igt_gpu_reloc(struct i915_execbuffer *eb, if (err) goto unpin_vma; + err = reloc_gpu_emit(&eb->reloc_cache); + if (err) + goto unpin_vma; + /* 8-Byte aligned */ err = __reloc_entry_gpu(eb, vma, offsets[0] * sizeof(u32), 0); if (err) @@ -64,9 +68,7 @@ static int __igt_gpu_reloc(struct i915_execbuffer *eb, GEM_BUG_ON(!eb->reloc_cache.rq); rq = i915_request_get(eb->reloc_cache.rq); - err = reloc_gpu_flush(&eb->reloc_cache); - if (err) - goto put_rq; + reloc_gpu_flush(&eb->reloc_cache); err = i915_gem_object_wait(obj, I915_WAIT_INTERRUPTIBLE, HZ / 2); if (err) {