From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 47603C433FB for ; Tue, 14 Jul 2020 11:45:58 +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 24C1C2220D for ; Tue, 14 Jul 2020 11:45:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 24C1C2220D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com 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 C0E8B6E94F; Tue, 14 Jul 2020 11:45:57 +0000 (UTC) Received: from mblankhorst.nl (mblankhorst.nl [IPv6:2a02:2308::216:3eff:fe92:dfa3]) by gabe.freedesktop.org (Postfix) with ESMTPS id DE0EA6E95A for ; Tue, 14 Jul 2020 11:45:22 +0000 (UTC) From: Maarten Lankhorst To: intel-gfx@lists.freedesktop.org Date: Tue, 14 Jul 2020 13:45:14 +0200 Message-Id: <20200714114516.3073222-21-maarten.lankhorst@linux.intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200714114516.3073222-1-maarten.lankhorst@linux.intel.com> References: <20200714114516.3073222-1-maarten.lankhorst@linux.intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 21/23] drm/i915: Move i915_vma_lock in the selftests to avoid lock inversion, v2. 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Make sure vma_lock is not used as inner lock when kernel context is used, and add ww handling where appropriate. Ensure that execbuf selftests keep passing by using ww handling. Signed-off-by: Maarten Lankhorst --- .../i915/gem/selftests/i915_gem_coherency.c | 26 ++++++------ .../drm/i915/gem/selftests/i915_gem_context.c | 9 ++-- .../drm/i915/gem/selftests/i915_gem_mman.c | 41 ++++++++++++++----- drivers/gpu/drm/i915/gt/selftest_rps.c | 30 ++++++++------ drivers/gpu/drm/i915/selftests/i915_request.c | 18 +++++--- 5 files changed, 80 insertions(+), 44 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c index dcdfc396f2f8..7049a6bbc03d 100644 --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c @@ -201,25 +201,25 @@ static int gpu_set(struct context *ctx, unsigned long offset, u32 v) i915_gem_object_lock(ctx->obj, NULL); err = i915_gem_object_set_to_gtt_domain(ctx->obj, true); - i915_gem_object_unlock(ctx->obj); if (err) - return err; + goto out_unlock; vma = i915_gem_object_ggtt_pin(ctx->obj, NULL, 0, 0, 0); - if (IS_ERR(vma)) - return PTR_ERR(vma); + if (IS_ERR(vma)) { + err = PTR_ERR(vma); + goto out_unlock; + } rq = intel_engine_create_kernel_request(ctx->engine); if (IS_ERR(rq)) { - i915_vma_unpin(vma); - return PTR_ERR(rq); + err = PTR_ERR(rq); + goto out_unpin; } cs = intel_ring_begin(rq, 4); if (IS_ERR(cs)) { - i915_request_add(rq); - i915_vma_unpin(vma); - return PTR_ERR(cs); + err = PTR_ERR(cs); + goto out_rq; } if (INTEL_GEN(ctx->engine->i915) >= 8) { @@ -240,14 +240,16 @@ static int gpu_set(struct context *ctx, unsigned long offset, u32 v) } intel_ring_advance(rq, cs); - i915_vma_lock(vma); err = i915_request_await_object(rq, vma->obj, true); if (err == 0) err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE); - i915_vma_unlock(vma); - i915_vma_unpin(vma); +out_rq: i915_request_add(rq); +out_unpin: + i915_vma_unpin(vma); +out_unlock: + i915_gem_object_unlock(ctx->obj); return err; } diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c index b93fd16a539d..29ff33ce3f44 100644 --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c @@ -958,13 +958,12 @@ emit_rpcs_query(struct drm_i915_gem_object *obj, i915_gem_object_lock(obj, NULL); err = i915_gem_object_set_to_gtt_domain(obj, false); - i915_gem_object_unlock(obj); if (err) - return err; + goto out; err = i915_vma_pin(vma, 0, 0, PIN_USER); if (err) - return err; + goto out; batch = rpcs_query_batch(vma); if (IS_ERR(batch)) { @@ -1013,7 +1012,7 @@ emit_rpcs_query(struct drm_i915_gem_object *obj, i915_request_add(rq); - return 0; + goto out; skip_request: i915_request_set_error_once(rq, err); @@ -1023,6 +1022,8 @@ emit_rpcs_query(struct drm_i915_gem_object *obj, err_vma: i915_vma_unpin(vma); +out: + i915_gem_object_unlock(obj); return err; } diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c index 9fb95a45bcad..d27d87a678c8 100644 --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c @@ -528,31 +528,42 @@ static int make_obj_busy(struct drm_i915_gem_object *obj) for_each_uabi_engine(engine, i915) { struct i915_request *rq; struct i915_vma *vma; + struct i915_gem_ww_ctx ww; int err; vma = i915_vma_instance(obj, &engine->gt->ggtt->vm, NULL); if (IS_ERR(vma)) return PTR_ERR(vma); - err = i915_vma_pin(vma, 0, 0, PIN_USER); + i915_gem_ww_ctx_init(&ww, false); +retry: + err = i915_gem_object_lock(obj, &ww); + if (!err) + err = i915_vma_pin_ww(vma, &ww, 0, 0, PIN_USER); if (err) - return err; + goto err; rq = intel_engine_create_kernel_request(engine); if (IS_ERR(rq)) { - i915_vma_unpin(vma); - return PTR_ERR(rq); + err = PTR_ERR(rq); + goto err_unpin; } - i915_vma_lock(vma); err = i915_request_await_object(rq, vma->obj, true); if (err == 0) err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE); - i915_vma_unlock(vma); i915_request_add(rq); +err_unpin: i915_vma_unpin(vma); +err: + if (err == -EDEADLK) { + err = i915_gem_ww_ctx_backoff(&ww); + if (!err) + goto retry; + } + i915_gem_ww_ctx_fini(&ww); if (err) return err; } @@ -1123,6 +1134,7 @@ static int __igt_mmap_gpu(struct drm_i915_private *i915, for_each_uabi_engine(engine, i915) { struct i915_request *rq; struct i915_vma *vma; + struct i915_gem_ww_ctx ww; vma = i915_vma_instance(obj, engine->kernel_context->vm, NULL); if (IS_ERR(vma)) { @@ -1130,9 +1142,13 @@ static int __igt_mmap_gpu(struct drm_i915_private *i915, goto out_unmap; } - err = i915_vma_pin(vma, 0, 0, PIN_USER); + i915_gem_ww_ctx_init(&ww, false); +retry: + err = i915_gem_object_lock(obj, &ww); + if (!err) + err = i915_vma_pin_ww(vma, &ww, 0, 0, PIN_USER); if (err) - goto out_unmap; + goto out_ww; rq = i915_request_create(engine->kernel_context); if (IS_ERR(rq)) { @@ -1140,11 +1156,9 @@ static int __igt_mmap_gpu(struct drm_i915_private *i915, goto out_unpin; } - i915_vma_lock(vma); err = i915_request_await_object(rq, vma->obj, false); if (err == 0) err = i915_vma_move_to_active(vma, rq, 0); - i915_vma_unlock(vma); err = engine->emit_bb_start(rq, vma->node.start, 0, 0); i915_request_get(rq); @@ -1166,6 +1180,13 @@ static int __igt_mmap_gpu(struct drm_i915_private *i915, out_unpin: i915_vma_unpin(vma); +out_ww: + if (err == -EDEADLK) { + err = i915_gem_ww_ctx_backoff(&ww); + if (!err) + goto retry; + } + i915_gem_ww_ctx_fini(&ww); if (err) goto out_unmap; } diff --git a/drivers/gpu/drm/i915/gt/selftest_rps.c b/drivers/gpu/drm/i915/gt/selftest_rps.c index 8624f5d2a1f3..e0be3840d9ff 100644 --- a/drivers/gpu/drm/i915/gt/selftest_rps.c +++ b/drivers/gpu/drm/i915/gt/selftest_rps.c @@ -77,20 +77,20 @@ create_spin_counter(struct intel_engine_cs *engine, vma = i915_vma_instance(obj, vm, NULL); if (IS_ERR(vma)) { - i915_gem_object_put(obj); - return vma; + err = PTR_ERR(vma); + goto err_put; } err = i915_vma_pin(vma, 0, 0, PIN_USER); - if (err) { - i915_vma_put(vma); - return ERR_PTR(err); - } + if (err) + goto err_unlock; + + i915_vma_lock(vma); base = i915_gem_object_pin_map(obj, I915_MAP_WC); if (IS_ERR(base)) { - i915_gem_object_put(obj); - return ERR_CAST(base); + err = PTR_ERR(base); + goto err_unpin; } cs = base; @@ -134,6 +134,14 @@ create_spin_counter(struct intel_engine_cs *engine, *cancel = base + loop; *counter = srm ? memset32(base + end, 0, 1) : NULL; return vma; + +err_unpin: + i915_vma_unpin(vma); +err_unlock: + i915_vma_unlock(vma); +err_put: + i915_gem_object_put(obj); + return ERR_PTR(err); } static u8 wait_for_freq(struct intel_rps *rps, u8 freq, int timeout_ms) @@ -639,7 +647,6 @@ int live_rps_frequency_cs(void *arg) goto err_vma; } - i915_vma_lock(vma); err = i915_request_await_object(rq, vma->obj, false); if (!err) err = i915_vma_move_to_active(vma, rq, 0); @@ -647,7 +654,6 @@ int live_rps_frequency_cs(void *arg) err = rq->engine->emit_bb_start(rq, vma->node.start, PAGE_SIZE, 0); - i915_vma_unlock(vma); i915_request_add(rq); if (err) goto err_vma; @@ -708,6 +714,7 @@ int live_rps_frequency_cs(void *arg) i915_gem_object_flush_map(vma->obj); i915_gem_object_unpin_map(vma->obj); i915_vma_unpin(vma); + i915_vma_unlock(vma); i915_vma_put(vma); st_engine_heartbeat_enable(engine); @@ -781,7 +788,6 @@ int live_rps_frequency_srm(void *arg) goto err_vma; } - i915_vma_lock(vma); err = i915_request_await_object(rq, vma->obj, false); if (!err) err = i915_vma_move_to_active(vma, rq, 0); @@ -789,7 +795,6 @@ int live_rps_frequency_srm(void *arg) err = rq->engine->emit_bb_start(rq, vma->node.start, PAGE_SIZE, 0); - i915_vma_unlock(vma); i915_request_add(rq); if (err) goto err_vma; @@ -849,6 +854,7 @@ int live_rps_frequency_srm(void *arg) i915_gem_object_flush_map(vma->obj); i915_gem_object_unpin_map(vma->obj); i915_vma_unpin(vma); + i915_vma_unlock(vma); i915_vma_put(vma); st_engine_heartbeat_enable(engine); diff --git a/drivers/gpu/drm/i915/selftests/i915_request.c b/drivers/gpu/drm/i915/selftests/i915_request.c index 57dd6f5122ee..12d9e261dd40 100644 --- a/drivers/gpu/drm/i915/selftests/i915_request.c +++ b/drivers/gpu/drm/i915/selftests/i915_request.c @@ -862,6 +862,8 @@ static int live_all_engines(void *arg) goto out_free; } + i915_vma_lock(batch); + idx = 0; for_each_uabi_engine(engine, i915) { request[idx] = intel_engine_create_kernel_request(engine); @@ -872,11 +874,9 @@ static int live_all_engines(void *arg) goto out_request; } - i915_vma_lock(batch); err = i915_request_await_object(request[idx], batch->obj, 0); if (err == 0) err = i915_vma_move_to_active(batch, request[idx], 0); - i915_vma_unlock(batch); GEM_BUG_ON(err); err = engine->emit_bb_start(request[idx], @@ -891,6 +891,8 @@ static int live_all_engines(void *arg) idx++; } + i915_vma_unlock(batch); + idx = 0; for_each_uabi_engine(engine, i915) { if (i915_request_completed(request[idx])) { @@ -981,12 +983,13 @@ static int live_sequential_engines(void *arg) goto out_free; } + i915_vma_lock(batch); request[idx] = intel_engine_create_kernel_request(engine); if (IS_ERR(request[idx])) { err = PTR_ERR(request[idx]); pr_err("%s: Request allocation failed for %s with err=%d\n", __func__, engine->name, err); - goto out_request; + goto out_unlock; } if (prev) { @@ -996,16 +999,14 @@ static int live_sequential_engines(void *arg) i915_request_add(request[idx]); pr_err("%s: Request await failed for %s with err=%d\n", __func__, engine->name, err); - goto out_request; + goto out_unlock; } } - i915_vma_lock(batch); err = i915_request_await_object(request[idx], batch->obj, false); if (err == 0) err = i915_vma_move_to_active(batch, request[idx], 0); - i915_vma_unlock(batch); GEM_BUG_ON(err); err = engine->emit_bb_start(request[idx], @@ -1020,6 +1021,11 @@ static int live_sequential_engines(void *arg) prev = request[idx]; idx++; + +out_unlock: + i915_vma_unlock(batch); + if (err) + goto out_request; } idx = 0; -- 2.27.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx