From patchwork Fri Dec 16 19:25:42 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 9478421 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 5516A601C2 for ; Fri, 16 Dec 2016 19:31:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 47589287CD for ; Fri, 16 Dec 2016 19:31:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3C00B28772; Fri, 16 Dec 2016 19:31:04 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B3F4C28772 for ; Fri, 16 Dec 2016 19:31:03 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 71E5D6ED15; Fri, 16 Dec 2016 19:30:59 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-wm0-x242.google.com (mail-wm0-x242.google.com [IPv6:2a00:1450:400c:c09::242]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7D6316ECE1; Fri, 16 Dec 2016 19:26:24 +0000 (UTC) Received: by mail-wm0-x242.google.com with SMTP id u144so7261769wmu.0; Fri, 16 Dec 2016 11:26:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=HcuAcAPLonB47m+bS4OcDR3mrEYjdauz+E1bObHXOwU=; b=P90JL6gIVoeblMLakK2ETtUSMisAik88D8U+MR3d9BYIreifkwQjFxd020BOZKX86P DZwk6p/7V9C0W3xTAbQHqT/6dy/yifbrSnFkgjJ1UBu4kwYnbHqPGJRF0sPzwLEA/qW9 aCe04MOkAPrLGggF+sd+FivI9UP0TETwuZA0jDk5ULdZAb4GgC13hN+uA42osctJ/JyQ 0LEE4BppK0SM8rf7ioDVNuT4D7yHG4CkIYhkkLHZ+wBeQzjoKXxfFcei4QrEIjtLDwaJ x3fWh06Ojs3Km5MqxVQugHm/1EycMwZncdsSDbsTiNzNxFP8yEZkPx78y/n+jrEV30zN pVEw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references; bh=HcuAcAPLonB47m+bS4OcDR3mrEYjdauz+E1bObHXOwU=; b=KcTm/q21Jz2ypFYdXxOOrVaBvXriLaklyng7Fw+4WlhAXWCDR4dhND+QL3bLDvkCZI aFNhtwwaS+xvrUt9Blnto1zpL+3HmSlo+u7dJJ5se6t3e5B8d8dl6oPeQR2Hb3o237vC AZDj71p2xiJdQzckeJeMtml1kCEe1FQueWF87m/Jm4hRN8No4osu3zGjr7OShbfaOV4H 4hxV5i0Jz9n7xKo/2bs3mg+NCZEZJMoDlci0v0B1ATGuz7moxq9duUIIVON8bqzyj6Aj XgZjkMZTtQ/bjMQRmrJt8PURjbR8FO8O9iouJ3s5GzT8iVozkPGp5N47FCwRXmuwg/iz D/bQ== X-Gm-Message-State: AIkVDXKPKVcjakbxfrHjGgg6YvPEiRp+PDpIo6GhtundDtU+2qgPoARFvSKWm9RIknAqsg== X-Received: by 10.28.105.194 with SMTP id z63mr3955980wmh.78.1481916382663; Fri, 16 Dec 2016 11:26:22 -0800 (PST) Received: from haswell.alporthouse.com ([78.156.65.138]) by smtp.gmail.com with ESMTPSA id v2sm8125856wja.41.2016.12.16.11.26.21 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 16 Dec 2016 11:26:22 -0800 (PST) From: Chris Wilson To: dri-devel@lists.freedesktop.org Subject: [PATCH v3 30/38] drm: Compute tight evictions for drm_mm_scan Date: Fri, 16 Dec 2016 19:25:42 +0000 Message-Id: <20161216192550.8352-31-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20161216192550.8352-1-chris@chris-wilson.co.uk> References: <20161216192550.8352-1-chris@chris-wilson.co.uk> Cc: intel-gfx@lists.freedesktop.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Compute the minimal required hole during scan and only evict those nodes that overlap. This enables us to reduce the number of nodes we need to evict to the bare minimum. Signed-off-by: Chris Wilson Reviewed-by: Joonas Lahtinen --- drivers/gpu/drm/drm_mm.c | 60 +++++++++++++++++++++++++++------ drivers/gpu/drm/etnaviv/etnaviv_mmu.c | 2 +- drivers/gpu/drm/i915/i915_gem_evict.c | 3 +- drivers/gpu/drm/selftests/test-drm_mm.c | 10 +++--- include/drm/drm_mm.h | 22 ++++++------ 5 files changed, 71 insertions(+), 26 deletions(-) diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c index 1b5613bcb35e..189ab84c5a59 100644 --- a/drivers/gpu/drm/drm_mm.c +++ b/drivers/gpu/drm/drm_mm.c @@ -718,10 +718,10 @@ EXPORT_SYMBOL(drm_mm_replace_node); * @color: opaque tag value to use for the allocation * @start: start of the allowed range for the allocation * @end: end of the allowed range for the allocation + * @flags: flags to specify how the allocation will be performed afterwards * * This simply sets up the scanning routines with the parameters for the desired - * hole. Note that there's no need to specify allocation flags, since they only - * change the place a node is allocated from within a suitable hole. + * hole. * * Warning: * As long as the scan list is non-empty, no other operations than @@ -733,7 +733,8 @@ void drm_mm_scan_init_with_range(struct drm_mm_scan *scan, u64 alignment, unsigned long color, u64 start, - u64 end) + u64 end, + unsigned int flags) { DRM_MM_BUG_ON(start >= end); DRM_MM_BUG_ON(!size || size > end - start); @@ -744,6 +745,7 @@ void drm_mm_scan_init_with_range(struct drm_mm_scan *scan, scan->color = color; scan->alignment = alignment; scan->size = size; + scan->flags = flags; DRM_MM_BUG_ON(end <= start); scan->range_start = start; @@ -778,7 +780,7 @@ bool drm_mm_scan_add_block(struct drm_mm_scan *scan, DRM_MM_BUG_ON(node->mm != mm); DRM_MM_BUG_ON(!node->allocated); DRM_MM_BUG_ON(node->scanned_block); - node->scanned_block = 1; + node->scanned_block = true; mm->scan_active++; hole = list_prev_entry(node, node_list); @@ -800,15 +802,53 @@ bool drm_mm_scan_add_block(struct drm_mm_scan *scan, adj_start = max(col_start, scan->range_start); adj_end = min(col_end, scan->range_end); + if (adj_end <= adj_start || adj_end - adj_start < scan->size) + return false; + + if (scan->flags == DRM_MM_CREATE_TOP) + adj_start = adj_end - scan->size; + + if (scan->alignment) { + u64 rem; + + div64_u64_rem(adj_start, scan->alignment, &rem); + if (rem) { + adj_start -= rem; + if (scan->flags != DRM_MM_CREATE_TOP) + adj_start += scan->alignment; + if (adj_start < max(col_start, scan->range_start) || + min(col_end, scan->range_end) - adj_start < scan->size) + return false; + + if (adj_end <= adj_start || + adj_end - adj_start < scan->size) + return false; + } + } - if (check_free_hole(adj_start, adj_end, - scan->size, scan->alignment)) { + if (mm->color_adjust) { + /* If allocations need adjusting due to neighbouring colours, + * we do not have enough information to decide if we need + * to evict nodes on either side of [adj_start, adj_end]. + * What almost works is + * hit_start = adj_start + (hole_start - col_start); + * hit_end = adj_start + scan->size + (hole_end - col_end); + * but because the decision is only made on the final hole, + * we may underestimate the required adjustments for an + * interior allocation. + */ scan->hit_start = hole_start; scan->hit_end = hole_end; - return true; + } else { + scan->hit_start = adj_start; + scan->hit_end = adj_start + scan->size; } - return false; + DRM_MM_BUG_ON(scan->hit_start >= scan->hit_end); + DRM_MM_BUG_ON(scan->hit_start < hole_start); + DRM_MM_BUG_ON(scan->hit_end > hole_end); + + return true; } EXPORT_SYMBOL(drm_mm_scan_add_block); @@ -836,7 +876,7 @@ bool drm_mm_scan_remove_block(struct drm_mm_scan *scan, DRM_MM_BUG_ON(node->mm != scan->mm); DRM_MM_BUG_ON(!node->scanned_block); - node->scanned_block = 0; + node->scanned_block = false; DRM_MM_BUG_ON(!node->mm->scan_active); node->mm->scan_active--; @@ -846,7 +886,7 @@ bool drm_mm_scan_remove_block(struct drm_mm_scan *scan, prev_node->hole_follows = node->scanned_preceeds_hole; list_add(&node->node_list, &prev_node->node_list); - return (drm_mm_hole_node_end(node) > scan->hit_start && + return (node->start + node->size > scan->hit_start && node->start < scan->hit_end); } EXPORT_SYMBOL(drm_mm_scan_remove_block); diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c index fe1e886dcabb..2dae3169ce48 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c @@ -135,7 +135,7 @@ static int etnaviv_iommu_find_iova(struct etnaviv_iommu *mmu, } /* Try to retire some entries */ - drm_mm_scan_init(&scan, &mmu->mm, size, 0, 0); + drm_mm_scan_init(&scan, &mmu->mm, size, 0, 0, 0); found = 0; INIT_LIST_HEAD(&list); diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c b/drivers/gpu/drm/i915/i915_gem_evict.c index 77ded288534b..2741498cdf2b 100644 --- a/drivers/gpu/drm/i915/i915_gem_evict.c +++ b/drivers/gpu/drm/i915/i915_gem_evict.c @@ -128,7 +128,8 @@ i915_gem_evict_something(struct i915_address_space *vm, */ drm_mm_scan_init_with_range(&scan, &vm->mm, min_size, alignment, cache_level, - start, end); + start, end, + flags & PIN_HIGH ? DRM_MM_CREATE_TOP : 0); /* Retire before we search the active list. Although we have * reasonable accuracy in our retirement lists, we may have diff --git a/drivers/gpu/drm/selftests/test-drm_mm.c b/drivers/gpu/drm/selftests/test-drm_mm.c index b96b2964aa01..71a75043e8b5 100644 --- a/drivers/gpu/drm/selftests/test-drm_mm.c +++ b/drivers/gpu/drm/selftests/test-drm_mm.c @@ -1194,7 +1194,7 @@ static bool evict_nothing(struct drm_mm *mm, struct drm_mm_node *node; unsigned int n; - drm_mm_scan_init(&scan, mm, 1, 0, 0); + drm_mm_scan_init(&scan, mm, 1, 0, 0, 0); for (n = 0; n < total_size; n++) { e = &nodes[n]; list_add(&e->link, &evict_list); @@ -1241,7 +1241,7 @@ static bool evict_everything(struct drm_mm *mm, unsigned int n; int err; - drm_mm_scan_init(&scan, mm, total_size, 0, 0); + drm_mm_scan_init(&scan, mm, total_size, 0, 0, 0); for (n = 0; n < total_size; n++) { e = &nodes[n]; list_add(&e->link, &evict_list); @@ -1291,7 +1291,8 @@ static int evict_something(struct drm_mm *mm, drm_mm_scan_init_with_range(&scan, mm, size, alignment, 0, - range_start, range_end); + range_start, range_end, + mode->create_flags); if (!evict_nodes(&scan, nodes, order, count, &evict_list)) @@ -1869,7 +1870,8 @@ static int evict_color(struct drm_mm *mm, drm_mm_scan_init_with_range(&scan, mm, size, alignment, color, - range_start, range_end); + range_start, range_end, + mode->create_flags); if (!evict_nodes(&scan, nodes, order, count, &evict_list)) diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h index bae0f10da8e3..606336fc229a 100644 --- a/include/drm/drm_mm.h +++ b/include/drm/drm_mm.h @@ -120,6 +120,7 @@ struct drm_mm_scan { struct drm_mm_node *prev_scanned_node; unsigned long color; + unsigned int flags; }; /** @@ -388,11 +389,9 @@ __drm_mm_interval_first(const struct drm_mm *mm, u64 start, u64 last); void drm_mm_scan_init_with_range(struct drm_mm_scan *scan, struct drm_mm *mm, - u64 size, - u64 alignment, - unsigned long color, - u64 start, - u64 end); + u64 size, u64 alignment, unsigned long color, + u64 start, u64 end, + unsigned int flags); /** * drm_mm_scan_init - initialize lru scanning @@ -401,10 +400,10 @@ void drm_mm_scan_init_with_range(struct drm_mm_scan *scan, * @size: size of the allocation * @alignment: alignment of the allocation * @color: opaque tag value to use for the allocation + * @flags: flags to specify how the allocation will be performed afterwards * * This simply sets up the scanning routines with the parameters for the desired - * hole. Note that there's no need to specify allocation flags, since they only - * change the place a node is allocated from within a suitable hole. + * hole. * * Warning: * As long as the scan list is non-empty, no other operations than @@ -414,10 +413,13 @@ static inline void drm_mm_scan_init(struct drm_mm_scan *scan, struct drm_mm *mm, u64 size, u64 alignment, - unsigned long color) + unsigned long color, + unsigned int flags) { - drm_mm_scan_init_with_range(scan, mm, size, alignment, color, - 0, U64_MAX); + drm_mm_scan_init_with_range(scan, mm, + size, alignment, color, + 0, U64_MAX, + flags); } bool drm_mm_scan_add_block(struct drm_mm_scan *scan,