From patchwork Mon Nov 7 08:52:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Niranjana Vishwanathapura X-Patchwork-Id: 13034098 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 6B40AC4332F for ; Mon, 7 Nov 2022 08:54:09 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5FF6F10E2AE; Mon, 7 Nov 2022 08:52:44 +0000 (UTC) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3949210E258; Mon, 7 Nov 2022 08:52:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1667811147; x=1699347147; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=DK/FPRxkqJmWaznboIDX73OSn2Uz6KZpH983CtxQ8Es=; b=WuFJPkoC9X2pqbLHkffkapIqfRdEX0lZWKneoI7SahaKI7VGNRt4GqPB d13YGPbOimmEKidqEFGIkAFk7nZBtuFGIXBSYgAOiV3ggSyIlIZBPfn4w c+2mEohEn41TIHEfPMmX4dJed4FP0WV2wcUQ4dSK7B8W95p8iiQY5mHJJ W4x+mm8z1TTFg1zocD8Swil8T3q8jF4uX9lI+WcToU1+kkxiX0UBuSX5p 3mpjjYc/5xaqGHOTjl9hQIxiH5HRGRpZbMEZh80Lfsq+/w8Cv3P+h3pxG cYOrgrDG5g3BIQbZJfxrScYxW6gWkMImlbeIv8l/87Fj/Gl9q7HT6M/tS w==; X-IronPort-AV: E=McAfee;i="6500,9779,10523"; a="312126179" X-IronPort-AV: E=Sophos;i="5.96,143,1665471600"; d="scan'208";a="312126179" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Nov 2022 00:52:26 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10523"; a="880984653" X-IronPort-AV: E=Sophos;i="5.96,143,1665471600"; d="scan'208";a="880984653" Received: from nvishwa1-desk.sc.intel.com ([172.25.29.76]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Nov 2022 00:52:26 -0800 From: Niranjana Vishwanathapura To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH v6 15/20] drm/i915/vm_bind: Handle persistent vmas in execbuf3 Date: Mon, 7 Nov 2022 00:52:05 -0800 Message-Id: <20221107085210.17221-16-niranjana.vishwanathapura@intel.com> X-Mailer: git-send-email 2.21.0.rc0.32.g243a4c7e27 In-Reply-To: <20221107085210.17221-1-niranjana.vishwanathapura@intel.com> References: <20221107085210.17221-1-niranjana.vishwanathapura@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: matthew.brost@intel.com, paulo.r.zanoni@intel.com, tvrtko.ursulin@intel.com, jani.nikula@intel.com, lionel.g.landwerlin@intel.com, thomas.hellstrom@intel.com, matthew.auld@intel.com, jason@jlekstrand.net, andi.shyti@linux.intel.com, daniel.vetter@intel.com, christian.koenig@amd.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Handle persistent (VM_BIND) mappings during the request submission in the execbuf3 path. v2: Ensure requests wait for bindings to complete. v3: Remove short term pinning with PIN_VALIDATE flag. Individualize fences before adding to dma_resv obj. v4: Fix bind completion check, use PIN_NOEVICT, use proper lock while checking if vm_rebind_list is empty. Reviewed-by: Matthew Auld Signed-off-by: Niranjana Vishwanathapura Signed-off-by: Andi Shyti --- .../gpu/drm/i915/gem/i915_gem_execbuffer3.c | 215 +++++++++++++++++- 1 file changed, 214 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer3.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer3.c index 64251dc4cf91..d91c2e96cd0f 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer3.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer3.c @@ -3,6 +3,7 @@ * Copyright © 2022 Intel Corporation */ +#include #include #include @@ -19,6 +20,7 @@ #include "i915_gem_vm_bind.h" #include "i915_trace.h" +#define __EXEC3_HAS_PIN BIT_ULL(33) #define __EXEC3_ENGINE_PINNED BIT_ULL(32) #define __EXEC3_INTERNAL_FLAGS (~0ull << 32) @@ -42,7 +44,9 @@ * execlist. Hence, no support for implicit sync. * * The new execbuf3 ioctl only works in VM_BIND mode and the VM_BIND mode only - * works with execbuf3 ioctl for submission. + * works with execbuf3 ioctl for submission. All BOs mapped on that VM (through + * VM_BIND call) at the time of execbuf3 call are deemed required for that + * submission. * * The execbuf3 ioctl directly specifies the batch addresses instead of as * object handles as in execbuf2 ioctl. The execbuf3 ioctl will also not @@ -58,6 +62,13 @@ * So, a lot of code supporting execbuf2 ioctl, like relocations, VA evictions, * vma lookup table, implicit sync, vma active reference tracking etc., are not * applicable for execbuf3 ioctl. + * + * During each execbuf submission, request fence is added to all VM_BIND mapped + * objects with DMA_RESV_USAGE_BOOKKEEP. The DMA_RESV_USAGE_BOOKKEEP usage will + * prevent over sync (See enum dma_resv_usage). Note that DRM_I915_GEM_WAIT and + * DRM_I915_GEM_BUSY ioctls do not check for DMA_RESV_USAGE_BOOKKEEP usage and + * hence should not be used for end of batch check. Instead, the execbuf3 + * timeline out fence should be used for end of batch check. */ /** @@ -129,6 +140,23 @@ eb_find_vma(struct i915_address_space *vm, u64 addr) return i915_gem_vm_bind_lookup_vma(vm, va); } +static void eb_scoop_unbound_vma_all(struct i915_address_space *vm) +{ + struct i915_vma *vma, *vn; + + /** + * Move all unbound vmas back into vm_bind_list so that they are + * revalidated. + */ + spin_lock(&vm->vm_rebind_lock); + list_for_each_entry_safe(vma, vn, &vm->vm_rebind_list, vm_rebind_link) { + list_del_init(&vma->vm_rebind_link); + if (!list_empty(&vma->vm_bind_link)) + list_move_tail(&vma->vm_bind_link, &vm->vm_bind_list); + } + spin_unlock(&vm->vm_rebind_lock); +} + static int eb_lookup_vma_all(struct i915_execbuffer *eb) { struct i915_vma *vma; @@ -142,14 +170,108 @@ static int eb_lookup_vma_all(struct i915_execbuffer *eb) eb->batches[i] = vma; } + eb_scoop_unbound_vma_all(eb->context->vm); + + return 0; +} + +static int eb_lock_vma_all(struct i915_execbuffer *eb) +{ + struct i915_address_space *vm = eb->context->vm; + struct i915_vma *vma; + int err; + + err = i915_gem_object_lock(eb->context->vm->root_obj, &eb->ww); + if (err) + return err; + + list_for_each_entry(vma, &vm->non_priv_vm_bind_list, + non_priv_vm_bind_link) { + err = i915_gem_object_lock(vma->obj, &eb->ww); + if (err) + return err; + } + return 0; } +static void eb_release_persistent_vma_all(struct i915_execbuffer *eb) +{ + struct i915_address_space *vm = eb->context->vm; + struct i915_vma *vma, *vn; + + lockdep_assert_held(&vm->vm_bind_lock); + + if (!(eb->args->flags & __EXEC3_HAS_PIN)) + return; + + assert_object_held(vm->root_obj); + + list_for_each_entry_safe(vma, vn, &vm->vm_bind_list, vm_bind_link) + if (!i915_vma_verify_bind_complete(vma)) + list_move_tail(&vma->vm_bind_link, &vm->vm_bound_list); + + eb->args->flags &= ~__EXEC3_HAS_PIN; +} + static void eb_release_vma_all(struct i915_execbuffer *eb) { + eb_release_persistent_vma_all(eb); eb_unpin_engine(eb); } +static int eb_reserve_fence_for_persistent_vma_all(struct i915_execbuffer *eb) +{ + struct i915_address_space *vm = eb->context->vm; + u64 num_fences = 1; + struct i915_vma *vma; + int ret; + + /* Reserve enough slots to accommodate composite fences */ + if (intel_context_is_parallel(eb->context)) + num_fences = eb->num_batches; + + ret = dma_resv_reserve_fences(vm->root_obj->base.resv, num_fences); + if (ret) + return ret; + + list_for_each_entry(vma, &vm->non_priv_vm_bind_list, + non_priv_vm_bind_link) { + ret = dma_resv_reserve_fences(vma->obj->base.resv, num_fences); + if (ret) + return ret; + } + + return 0; +} + +static int eb_validate_persistent_vma_all(struct i915_execbuffer *eb) +{ + struct i915_address_space *vm = eb->context->vm; + struct i915_vma *vma; + int ret = 0; + + lockdep_assert_held(&vm->vm_bind_lock); + assert_object_held(vm->root_obj); + + ret = eb_reserve_fence_for_persistent_vma_all(eb); + if (ret) + return ret; + + list_for_each_entry(vma, &vm->vm_bind_list, vm_bind_link) { + u64 pin_flags = vma->start | PIN_OFFSET_FIXED | PIN_USER | + PIN_VALIDATE | PIN_NOEVICT; + + ret = i915_vma_pin_ww(vma, &eb->ww, 0, 0, pin_flags); + if (ret) + break; + + eb->args->flags |= __EXEC3_HAS_PIN; + } + + return ret; +} + /* * Using two helper loops for the order of which requests / batches are created * and added the to backend. Requests are created in order from the parent to @@ -161,13 +283,80 @@ static void eb_release_vma_all(struct i915_execbuffer *eb) */ #define for_each_batch_create_order(_eb) \ for (unsigned int i = 0; i < (_eb)->num_batches; ++i) +#define for_each_batch_add_order(_eb) \ + for (int i = (_eb)->num_batches - 1; i >= 0; --i) + +static void __eb_persistent_add_shared_fence(struct drm_i915_gem_object *obj, + struct dma_fence *fence) +{ + struct dma_fence *curr; + int idx; + + dma_fence_array_for_each(curr, idx, fence) + dma_resv_add_fence(obj->base.resv, curr, + DMA_RESV_USAGE_BOOKKEEP); + + obj->write_domain = 0; + obj->read_domains |= I915_GEM_GPU_DOMAINS; + obj->mm.dirty = true; +} + +static void eb_persistent_add_shared_fence(struct i915_execbuffer *eb) +{ + struct i915_address_space *vm = eb->context->vm; + struct dma_fence *fence; + struct i915_vma *vma; + + fence = eb->composite_fence ? eb->composite_fence : + &eb->requests[0]->fence; + + __eb_persistent_add_shared_fence(vm->root_obj, fence); + list_for_each_entry(vma, &vm->non_priv_vm_bind_list, + non_priv_vm_bind_link) + __eb_persistent_add_shared_fence(vma->obj, fence); +} + +static void eb_move_all_persistent_vma_to_active(struct i915_execbuffer *eb) +{ + /* Add fence to BOs dma-resv fence list */ + eb_persistent_add_shared_fence(eb); +} static int eb_move_to_gpu(struct i915_execbuffer *eb) { + struct i915_address_space *vm = eb->context->vm; + struct i915_vma *vma; + int err = 0; + + lockdep_assert_held(&vm->vm_bind_lock); + assert_object_held(vm->root_obj); + + eb_move_all_persistent_vma_to_active(eb); + + list_for_each_entry(vma, &vm->vm_bind_list, vm_bind_link) { + for_each_batch_add_order(eb) { + if (!eb->requests[i]) + continue; + + err = i915_request_await_bind(eb->requests[i], vma); + if (err) + goto err_skip; + } + } + /* Unconditionally flush any chipset caches (for streaming writes). */ intel_gt_chipset_flush(eb->gt); return 0; + +err_skip: + for_each_batch_create_order(eb) { + if (!eb->requests[i]) + break; + + i915_request_set_error_once(eb->requests[i], err); + } + return err; } static int eb_request_submit(struct i915_execbuffer *eb, @@ -481,6 +670,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, mutex_lock(&eb.context->vm->vm_bind_lock); +lookup_vmas: err = eb_lookup_vma_all(&eb); if (err) { eb_release_vma_all(&eb); @@ -497,6 +687,29 @@ i915_gem_do_execbuffer(struct drm_device *dev, /* only throttle once, even if we didn't need to throttle */ throttle = false; + err = eb_lock_vma_all(&eb); + if (err) + goto err_validate; + + /** + * No object unbinds possible once the objects are locked. So, + * check for any unbinds here, which needs to be scooped up. + * + * XXX: Probably vm_rebind_list can be scooped in the validation + * phase instead of lookup phase, after holding object locks. + * Then this check won't be needed. + */ + spin_lock(&eb.context->vm->vm_rebind_lock); + if (!list_empty(&eb.context->vm->vm_rebind_list)) { + spin_unlock(&eb.context->vm->vm_rebind_lock); + eb_release_vma_all(&eb); + i915_gem_ww_ctx_fini(&eb.ww); + goto lookup_vmas; + } + spin_unlock(&eb.context->vm->vm_rebind_lock); + + err = eb_validate_persistent_vma_all(&eb); + err_validate: if (err == -EDEADLK) { eb_release_vma_all(&eb);