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 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 A9D7DC2BB9A for ; Wed, 12 Jun 2024 02:15:47 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4302D10E753; Wed, 12 Jun 2024 02:15:47 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="V4r0iHa+"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6B58110E755 for ; Wed, 12 Jun 2024 02:15:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1718158541; x=1749694541; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=Ga1Jlme//wJUv7FQcaWwWcFLy9crHLD7u3bUrqA2SLw=; b=V4r0iHa+GjIY9XPdBTsvPnNTHy8IpCC0nlprMsjMnriFx0G8ZmrnQfs9 69jVPNZnNobF6xpz/YMhvNV2Uw9PFCw7slBIAm68sj2acVdsYJ/t17Sc3 fD8flYjSLniKsHQx2AbobUYf+ydhFWGe1RjH8BvuGkWPqV4ti53ky1MuN Z60T8ecgQ2X6T1HGkOKARP/fBoZkTUqGWfYyPyUZvRBHSOhskXCf7LBsm 2sFiuueDbEIlszEfdpeghT9FKiUnopSrJkv0887FUfX/iIyO/CYiK4hB9 4h8qqUKUwrTniPLsTuiK9oARuL6EriYvz0pSFfUjV4Py2PKT4wtD/MVTj g==; X-CSE-ConnectionGUID: JIaZoIVbQYKX6QfKzP+nyA== X-CSE-MsgGUID: 1JOwQqgbRaOZ4Uopcphe5A== X-IronPort-AV: E=McAfee;i="6600,9927,11100"; a="37427811" X-IronPort-AV: E=Sophos;i="6.08,231,1712646000"; d="scan'208";a="37427811" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jun 2024 19:15:27 -0700 X-CSE-ConnectionGUID: japr7pprTliEOQX09dvK0g== X-CSE-MsgGUID: iyuWPv4kReOb6NhzJ4V9sw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,231,1712646000"; d="scan'208";a="44763636" Received: from szeng-desk.jf.intel.com ([10.165.21.149]) by orviesa004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jun 2024 19:15:27 -0700 From: Oak Zeng To: intel-xe@lists.freedesktop.org Subject: [CI 20/43] drm/xe: Update PT layer with better error handling Date: Tue, 11 Jun 2024 22:25:42 -0400 Message-Id: <20240612022605.385062-20-oak.zeng@intel.com> X-Mailer: git-send-email 2.26.3 In-Reply-To: <20240612022605.385062-1-oak.zeng@intel.com> References: <20240612022605.385062-1-oak.zeng@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" From: Matthew Brost Update PT layer so if a memory allocation for a PTE fails the error can be propagated to the user without requiring to be killed. Signed-off-by: Matthew Brost --- drivers/gpu/drm/xe/xe_pt.c | 208 ++++++++++++++++++++++++++++--------- 1 file changed, 160 insertions(+), 48 deletions(-) diff --git a/drivers/gpu/drm/xe/xe_pt.c b/drivers/gpu/drm/xe/xe_pt.c index 4353a3bdf6c8..e4dd385ee954 100644 --- a/drivers/gpu/drm/xe/xe_pt.c +++ b/drivers/gpu/drm/xe/xe_pt.c @@ -845,19 +845,27 @@ xe_vm_populate_pgtable(struct xe_migrate_pt_update *pt_update, struct xe_tile *t } } -static void xe_pt_abort_bind(struct xe_vma *vma, - struct xe_vm_pgtable_update *entries, - u32 num_entries) +static void xe_pt_cancel_bind(struct xe_vma *vma, + struct xe_vm_pgtable_update *entries, + u32 num_entries) { u32 i, j; for (i = 0; i < num_entries; i++) { - if (!entries[i].pt_entries) + struct xe_pt *pt = entries[i].pt; + + if (!pt) continue; - for (j = 0; j < entries[i].qwords; j++) - xe_pt_destroy(entries[i].pt_entries[j].pt, xe_vma_vm(vma)->flags, NULL); + if (pt->level) { + for (j = 0; j < entries[i].qwords; j++) + xe_pt_destroy(entries[i].pt_entries[j].pt, + xe_vma_vm(vma)->flags, NULL); + } + kfree(entries[i].pt_entries); + entries[i].pt_entries = NULL; + entries[i].qwords = 0; } } @@ -873,10 +881,61 @@ static void xe_pt_commit_locks_assert(struct xe_vma *vma) xe_vm_assert_held(vm); } -static void xe_pt_commit_bind(struct xe_vma *vma, - struct xe_vm_pgtable_update *entries, - u32 num_entries, bool rebind, - struct llist_head *deferred) +static void xe_pt_commit(struct xe_vma *vma, + struct xe_vm_pgtable_update *entries, + u32 num_entries, struct llist_head *deferred) +{ + u32 i, j; + + xe_pt_commit_locks_assert(vma); + + for (i = 0; i < num_entries; i++) { + struct xe_pt *pt = entries[i].pt; + + if (!pt->level) + continue; + + for (j = 0; j < entries[i].qwords; j++) { + struct xe_pt *oldpte = entries[i].pt_entries[j].pt; + + xe_pt_destroy(oldpte, xe_vma_vm(vma)->flags, deferred); + } + } +} + +static void xe_pt_abort_bind(struct xe_vma *vma, + struct xe_vm_pgtable_update *entries, + u32 num_entries, bool rebind) +{ + int i, j; + + xe_pt_commit_locks_assert(vma); + + for (i = num_entries - 1; i >= 0; --i) { + struct xe_pt *pt = entries[i].pt; + struct xe_pt_dir *pt_dir; + + if (!rebind) + pt->num_live -= entries[i].qwords; + + if (!pt->level) + continue; + + pt_dir = as_xe_pt_dir(pt); + for (j = 0; j < entries[i].qwords; j++) { + u32 j_ = j + entries[i].ofs; + struct xe_pt *newpte = xe_pt_entry(pt_dir, j_); + struct xe_pt *oldpte = entries[i].pt_entries[j].pt; + + pt_dir->children[j_] = oldpte ? &oldpte->base : 0; + xe_pt_destroy(newpte, xe_vma_vm(vma)->flags, NULL); + } + } +} + +static void xe_pt_commit_prepare_bind(struct xe_vma *vma, + struct xe_vm_pgtable_update *entries, + u32 num_entries, bool rebind) { u32 i, j; @@ -896,12 +955,13 @@ static void xe_pt_commit_bind(struct xe_vma *vma, for (j = 0; j < entries[i].qwords; j++) { u32 j_ = j + entries[i].ofs; struct xe_pt *newpte = entries[i].pt_entries[j].pt; + struct xe_pt *oldpte = NULL; if (xe_pt_entry(pt_dir, j_)) - xe_pt_destroy(xe_pt_entry(pt_dir, j_), - xe_vma_vm(vma)->flags, deferred); + oldpte = xe_pt_entry(pt_dir, j_); pt_dir->children[j_] = &newpte->base; + entries[i].pt_entries[j].pt = oldpte; } } } @@ -925,8 +985,6 @@ xe_pt_prepare_bind(struct xe_tile *tile, struct xe_vma *vma, err = xe_pt_stage_bind(tile, vma, entries, num_entries); if (!err) xe_tile_assert(tile, *num_entries); - else /* abort! */ - xe_pt_abort_bind(vma, entries, *num_entries); return err; } @@ -1447,7 +1505,7 @@ xe_pt_stage_unbind_post_descend(struct xe_ptw *parent, pgoff_t offset, &end_offset)) return 0; - (void)xe_pt_new_shared(&xe_walk->wupd, xe_child, offset, false); + (void)xe_pt_new_shared(&xe_walk->wupd, xe_child, offset, true); xe_walk->wupd.updates[level].update->qwords = end_offset - offset; return 0; @@ -1515,32 +1573,57 @@ xe_migrate_clear_pgtable_callback(struct xe_migrate_pt_update *pt_update, memset64(ptr, empty, num_qwords); } +static void xe_pt_abort_unbind(struct xe_vma *vma, + struct xe_vm_pgtable_update *entries, + u32 num_entries) +{ + int j, i; + + xe_pt_commit_locks_assert(vma); + + for (j = num_entries - 1; j >= 0; --j) { + struct xe_vm_pgtable_update *entry = &entries[j]; + struct xe_pt *pt = entry->pt; + struct xe_pt_dir *pt_dir = as_xe_pt_dir(pt); + + pt->num_live += entry->qwords; + + if (!pt->level) + continue; + + for (i = entry->ofs; i < entry->ofs + entry->qwords; i++) + pt_dir->children[i] = + entries[j].pt_entries[i - entry->ofs].pt ? + &entries[j].pt_entries[i - entry->ofs].pt->base : 0; + } +} + static void -xe_pt_commit_unbind(struct xe_vma *vma, - struct xe_vm_pgtable_update *entries, u32 num_entries, - struct llist_head *deferred) +xe_pt_commit_prepare_unbind(struct xe_vma *vma, + struct xe_vm_pgtable_update *entries, + u32 num_entries) { - u32 j; + int j, i; xe_pt_commit_locks_assert(vma); for (j = 0; j < num_entries; ++j) { struct xe_vm_pgtable_update *entry = &entries[j]; struct xe_pt *pt = entry->pt; + struct xe_pt_dir *pt_dir; pt->num_live -= entry->qwords; - if (pt->level) { - struct xe_pt_dir *pt_dir = as_xe_pt_dir(pt); - u32 i; - - for (i = entry->ofs; i < entry->ofs + entry->qwords; - i++) { - if (xe_pt_entry(pt_dir, i)) - xe_pt_destroy(xe_pt_entry(pt_dir, i), - xe_vma_vm(vma)->flags, deferred); + if (!pt->level) + continue; - pt_dir->children[i] = NULL; - } + pt_dir = as_xe_pt_dir(pt); + for (i = entry->ofs; i < entry->ofs + entry->qwords; i++) { + if (xe_pt_entry(pt_dir, i)) + entries[j].pt_entries[i - entry->ofs].pt = + xe_pt_entry(pt_dir, i); + else + entries[j].pt_entries[i - entry->ofs].pt = NULL; + pt_dir->children[i] = NULL; } } } @@ -1586,7 +1669,6 @@ static int bind_op_prepare(struct xe_vm *vm, struct xe_tile *tile, { u32 current_op = pt_update_ops->current_op; struct xe_vm_pgtable_update_op *pt_op = &pt_update_ops->ops[current_op]; - struct llist_head *deferred = &pt_update_ops->deferred; int err; xe_bo_assert_held(xe_vma_bo(vma)); @@ -1633,11 +1715,12 @@ static int bind_op_prepare(struct xe_vm *vm, struct xe_tile *tile, (!pt_op->rebind && vm->scratch_pt[tile->id] && xe_vm_in_preempt_fence_mode(vm)); - /* FIXME: Don't commit right away */ vma->tile_staged |= BIT(tile->id); pt_op->vma = vma; - xe_pt_commit_bind(vma, pt_op->entries, pt_op->num_entries, - pt_op->rebind, deferred); + xe_pt_commit_prepare_bind(vma, pt_op->entries, + pt_op->num_entries, pt_op->rebind); + } else { + xe_pt_cancel_bind(vma, pt_op->entries, pt_op->num_entries); } return err; @@ -1649,7 +1732,6 @@ static int unbind_op_prepare(struct xe_tile *tile, { u32 current_op = pt_update_ops->current_op; struct xe_vm_pgtable_update_op *pt_op = &pt_update_ops->ops[current_op]; - struct llist_head *deferred = &pt_update_ops->deferred; int err; if (!((vma->tile_present | vma->tile_staged) & BIT(tile->id))) @@ -1685,9 +1767,7 @@ static int unbind_op_prepare(struct xe_tile *tile, pt_update_ops->needs_userptr_lock |= xe_vma_is_userptr(vma); pt_update_ops->needs_invalidation = true; - /* FIXME: Don't commit right away */ - xe_pt_commit_unbind(vma, pt_op->entries, pt_op->num_entries, - deferred); + xe_pt_commit_prepare_unbind(vma, pt_op->entries, pt_op->num_entries); return 0; } @@ -1908,7 +1988,7 @@ xe_pt_update_ops_run(struct xe_tile *tile, struct xe_vma_ops *vops) struct invalidation_fence *ifence = NULL; struct xe_range_fence *rfence; struct xe_vma_op *op; - int err = 0; + int err = 0, i; struct xe_migrate_pt_update update = { .ops = pt_update_ops->needs_userptr_lock ? &userptr_migrate_ops : @@ -1928,8 +2008,10 @@ xe_pt_update_ops_run(struct xe_tile *tile, struct xe_vma_ops *vops) if (pt_update_ops->needs_invalidation) { ifence = kzalloc(sizeof(*ifence), GFP_KERNEL); - if (!ifence) - return ERR_PTR(-ENOMEM); + if (!ifence) { + err = -ENOMEM; + goto kill_vm_tile1; + } } rfence = kzalloc(sizeof(*rfence), GFP_KERNEL); @@ -1944,6 +2026,15 @@ xe_pt_update_ops_run(struct xe_tile *tile, struct xe_vma_ops *vops) goto free_rfence; } + /* Point of no return - VM killed if failure after this */ + for (i = 0; i < pt_update_ops->current_op; ++i) { + struct xe_vm_pgtable_update_op *pt_op = &pt_update_ops->ops[i]; + + xe_pt_commit(pt_op->vma, pt_op->entries, + pt_op->num_entries, &pt_update_ops->deferred); + pt_op->vma = NULL; /* skip in xe_pt_update_ops_abort */ + } + err = xe_range_fence_insert(&vm->rftree[tile->id], rfence, &xe_range_fence_kfree_ops, pt_update_ops->start, @@ -1979,10 +2070,15 @@ xe_pt_update_ops_run(struct xe_tile *tile, struct xe_vma_ops *vops) if (pt_update_ops->needs_userptr_lock) up_read(&vm->userptr.notifier_lock); dma_fence_put(fence); + if (!tile->id) + xe_vm_kill(vops->vm, false); free_rfence: kfree(rfence); free_ifence: kfree(ifence); +kill_vm_tile1: + if (err != -EAGAIN && tile->id) + xe_vm_kill(vops->vm, false); return ERR_PTR(err); } @@ -2003,12 +2099,10 @@ void xe_pt_update_ops_fini(struct xe_tile *tile, struct xe_vma_ops *vops) lockdep_assert_held(&vops->vm->lock); xe_vm_assert_held(vops->vm); - /* FIXME: Not 100% correct */ - for (i = 0; i < pt_update_ops->num_ops; ++i) { + for (i = 0; i < pt_update_ops->current_op; ++i) { struct xe_vm_pgtable_update_op *pt_op = &pt_update_ops->ops[i]; - if (pt_op->bind) - xe_pt_free_bind(pt_op->entries, pt_op->num_entries); + xe_pt_free_bind(pt_op->entries, pt_op->num_entries); } xe_bo_put_commit(&vops->pt_update_ops[tile->id].deferred); } @@ -2022,10 +2116,28 @@ void xe_pt_update_ops_fini(struct xe_tile *tile, struct xe_vma_ops *vops) */ void xe_pt_update_ops_abort(struct xe_tile *tile, struct xe_vma_ops *vops) { + struct xe_vm_pgtable_update_ops *pt_update_ops = + &vops->pt_update_ops[tile->id]; + int i; + lockdep_assert_held(&vops->vm->lock); xe_vm_assert_held(vops->vm); - /* FIXME: Just kill VM for now + cleanup PTs */ + for (i = pt_update_ops->num_ops - 1; i >= 0; --i) { + struct xe_vm_pgtable_update_op *pt_op = + &pt_update_ops->ops[i]; + + if (!pt_op->vma || i >= pt_update_ops->current_op) + continue; + + if (pt_op->bind) + xe_pt_abort_bind(pt_op->vma, pt_op->entries, + pt_op->num_entries, + pt_op->rebind); + else + xe_pt_abort_unbind(pt_op->vma, pt_op->entries, + pt_op->num_entries); + } + xe_bo_put_commit(&vops->pt_update_ops[tile->id].deferred); - xe_vm_kill(vops->vm, false); - } +} -- 2.26.3