From patchwork Thu Feb 23 10:57:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Thomas Hellstrom X-Patchwork-Id: 13150121 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 518D9C636D6 for ; Thu, 23 Feb 2023 10:58:35 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A3AFA10E4BE; Thu, 23 Feb 2023 10:58:34 +0000 (UTC) Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id E11E310EB04; Thu, 23 Feb 2023 10:58:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1677149912; x=1708685912; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=hA0WPOrcI0iMRcxc4P+CCc9jAOJUSBd8NHfTvA9mQV8=; b=NTBnmiIL3sXZd+7wdJfvZfvAFGF8k73BlCalAPdihgwdEY5nKt+X/m8t 3LFTK7iYNKNoxbnv+1Z2kr19piByO4+WMS1BWim1/FiVyB5MPNmOC1OMi ZFuJ/MdQ6G8HoC9xQILPbSKWktkwdxpG3ueI3uoUGu1sP8zXQSnEipM3u FiPJ5ZNnFIWXqhcndlv2A98Tp21UMBLlM9bdj/y4kQdLlaQXTImtFrOgE Vhe6kapxTpNfqiwq4InHU5xVo3N6xkhR1XtMw9nh+ejdpTjGlmAEnPQUo yyw5T8jn8Bw55mm5aLEvLKdPg4H3RPn+XcJnhxgB7an1LHALUcfltSscg w==; X-IronPort-AV: E=McAfee;i="6500,9779,10629"; a="395665822" X-IronPort-AV: E=Sophos;i="5.97,320,1669104000"; d="scan'208";a="395665822" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Feb 2023 02:58:32 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10629"; a="741225494" X-IronPort-AV: E=Sophos;i="5.97,320,1669104000"; d="scan'208";a="741225494" Received: from skallurr-mobl1.ger.corp.intel.com (HELO thellstr-mobl1.intel.com) ([10.249.254.84]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Feb 2023 02:58:29 -0800 From: =?utf-8?q?Thomas_Hellstr=C3=B6m?= To: dri-devel@lists.freedesktop.org Subject: [PATCH 1/3] drm/suballoc: Extract amdgpu_sa.c as generic suballocation helper Date: Thu, 23 Feb 2023 11:57:43 +0100 Message-Id: <20230223105747.4719-2-thomas.hellstrom@linux.intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230223105747.4719-1-thomas.hellstrom@linux.intel.com> References: <20230223105747.4719-1-thomas.hellstrom@linux.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: =?utf-8?q?Thomas_Hellstr=C3=B6m?= , Daniel Vetter , Christian Koenig , Dave Airlie , intel-xe@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Maarten Lankhorst Suballocating a buffer object is something that is not driver-specific and useful for many drivers. Use a slightly modified version of amdgpu_sa.c v2: - Style cleanups. (Thomas) - Added / Modified documentation (Thomas) - Use u64 for the sizes and offset. The code dates back to 2012 and using unsigned int will probably soon come back to bite us. We can consider size_t as well for better 32-bit efficiency. (Thomas) - Add and document gfp, intr and align arguments to drm_suballoc_new() (Thomas) - Use drm_printer for debug output (Thomas) Signed-off-by: Maarten Lankhorst Co-developed-by: Thomas Hellström Signed-off-by: Thomas Hellström --- drivers/gpu/drm/Kconfig | 4 + drivers/gpu/drm/Makefile | 3 + drivers/gpu/drm/drm_suballoc.c | 457 +++++++++++++++++++++++++++++++++ include/drm/drm_suballoc.h | 106 ++++++++ 4 files changed, 570 insertions(+) create mode 100644 drivers/gpu/drm/drm_suballoc.c create mode 100644 include/drm/drm_suballoc.h diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index dc0f94f02a82..8fbe57407c60 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -232,6 +232,10 @@ config DRM_GEM_SHMEM_HELPER help Choose this if you need the GEM shmem helper functions +config DRM_SUBALLOC_HELPER + tristate + depends on DRM + config DRM_SCHED tristate depends on DRM diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index ab4460fcd63f..1e04d135e866 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -88,6 +88,9 @@ obj-$(CONFIG_DRM_GEM_DMA_HELPER) += drm_dma_helper.o drm_shmem_helper-y := drm_gem_shmem_helper.o obj-$(CONFIG_DRM_GEM_SHMEM_HELPER) += drm_shmem_helper.o +drm_suballoc_helper-y := drm_suballoc.o +obj-$(CONFIG_DRM_SUBALLOC_HELPER) += drm_suballoc_helper.o + drm_vram_helper-y := drm_gem_vram_helper.o obj-$(CONFIG_DRM_VRAM_HELPER) += drm_vram_helper.o diff --git a/drivers/gpu/drm/drm_suballoc.c b/drivers/gpu/drm/drm_suballoc.c new file mode 100644 index 000000000000..057cd19c44ba --- /dev/null +++ b/drivers/gpu/drm/drm_suballoc.c @@ -0,0 +1,457 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/* + * Copyright 2011 Red Hat Inc. + * Copyright 2023 Intel Corporation. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE + * USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + */ +/* + * Authors: + * Jerome Glisse + */ +/* Algorithm: + * + * We store the last allocated bo in "hole", we always try to allocate + * after the last allocated bo. Principle is that in a linear GPU ring + * progression was is after last is the oldest bo we allocated and thus + * the first one that should no longer be in use by the GPU. + * + * If it's not the case we skip over the bo after last to the closest + * done bo if such one exist. If none exist and we are not asked to + * block we report failure to allocate. + * + * If we are asked to block we wait on all the oldest fence of all + * rings. We just wait for any of those fence to complete. + */ + +#include +#include +#include +#include +#include +#include + +static void drm_suballoc_remove_locked(struct drm_suballoc *sa); +static void drm_suballoc_try_free(struct drm_suballoc_manager *sa_manager); + +/** + * drm_suballoc_manager_init() - Initialise the drm_suballoc_manager + * @sa_manager: pointer to the sa_manager + * @size: number of bytes we want to suballocate + * @align: alignment for each suballocated chunk + * + * Prepares the suballocation manager for suballocations. + */ +void drm_suballoc_manager_init(struct drm_suballoc_manager *sa_manager, + u64 size, u64 align) +{ + unsigned int i; + + if (!align) + align = 1; + + /* alignment must be a power of 2 */ + if (WARN_ON_ONCE(align & (align - 1))) + align = roundup_pow_of_two(align); + + init_waitqueue_head(&sa_manager->wq); + sa_manager->size = size; + sa_manager->align = align; + sa_manager->hole = &sa_manager->olist; + INIT_LIST_HEAD(&sa_manager->olist); + for (i = 0; i < DRM_SUBALLOC_MAX_QUEUES; ++i) + INIT_LIST_HEAD(&sa_manager->flist[i]); +} +EXPORT_SYMBOL(drm_suballoc_manager_init); + +/** + * drm_suballoc_manager_fini() - Destroy the drm_suballoc_manager + * @sa_manager: pointer to the sa_manager + * + * Cleans up the suballocation manager after use. All fences added + * with drm_suballoc_free() must be signaled, or we cannot clean up + * the entire manager. + */ +void drm_suballoc_manager_fini(struct drm_suballoc_manager *sa_manager) +{ + struct drm_suballoc *sa, *tmp; + + if (!sa_manager->size) + return; + + if (!list_empty(&sa_manager->olist)) { + sa_manager->hole = &sa_manager->olist; + drm_suballoc_try_free(sa_manager); + if (!list_empty(&sa_manager->olist)) + DRM_ERROR("sa_manager is not empty, clearing anyway\n"); + } + list_for_each_entry_safe(sa, tmp, &sa_manager->olist, olist) { + drm_suballoc_remove_locked(sa); + } + + sa_manager->size = 0; +} +EXPORT_SYMBOL(drm_suballoc_manager_fini); + +static void drm_suballoc_remove_locked(struct drm_suballoc *sa) +{ + struct drm_suballoc_manager *sa_manager = sa->manager; + + if (sa_manager->hole == &sa->olist) + sa_manager->hole = sa->olist.prev; + + list_del_init(&sa->olist); + list_del_init(&sa->flist); + dma_fence_put(sa->fence); + kfree(sa); +} + +static void drm_suballoc_try_free(struct drm_suballoc_manager *sa_manager) +{ + struct drm_suballoc *sa, *tmp; + + if (sa_manager->hole->next == &sa_manager->olist) + return; + + sa = list_entry(sa_manager->hole->next, struct drm_suballoc, olist); + list_for_each_entry_safe_from(sa, tmp, &sa_manager->olist, olist) { + if (!sa->fence || !dma_fence_is_signaled(sa->fence)) + return; + + drm_suballoc_remove_locked(sa); + } +} + +static u64 drm_suballoc_hole_soffset(struct drm_suballoc_manager *sa_manager) +{ + struct list_head *hole = sa_manager->hole; + + if (hole != &sa_manager->olist) + return list_entry(hole, struct drm_suballoc, olist)->eoffset; + + return 0; +} + +static u64 drm_suballoc_hole_eoffset(struct drm_suballoc_manager *sa_manager) +{ + struct list_head *hole = sa_manager->hole; + + if (hole->next != &sa_manager->olist) + return list_entry(hole->next, struct drm_suballoc, olist)->soffset; + return sa_manager->size; +} + +static bool drm_suballoc_try_alloc(struct drm_suballoc_manager *sa_manager, + struct drm_suballoc *sa, + u64 size, u64 align) +{ + u64 soffset, eoffset, wasted; + + soffset = drm_suballoc_hole_soffset(sa_manager); + eoffset = drm_suballoc_hole_eoffset(sa_manager); + wasted = (align - (soffset % align)) % align; + + if ((eoffset - soffset) >= (size + wasted)) { + soffset += wasted; + + sa->manager = sa_manager; + sa->soffset = soffset; + sa->eoffset = soffset + size; + list_add(&sa->olist, sa_manager->hole); + INIT_LIST_HEAD(&sa->flist); + sa_manager->hole = &sa->olist; + return true; + } + return false; +} + +static bool __drm_suballoc_event(struct drm_suballoc_manager *sa_manager, + u64 size, u64 align) +{ + u64 soffset, eoffset, wasted; + unsigned int i; + + for (i = 0; i < DRM_SUBALLOC_MAX_QUEUES; ++i) + if (!list_empty(&sa_manager->flist[i])) + return true; + + soffset = drm_suballoc_hole_soffset(sa_manager); + eoffset = drm_suballoc_hole_eoffset(sa_manager); + wasted = (align - (soffset % align)) % align; + + return ((eoffset - soffset) >= (size + wasted)); +} + +/** + * drm_suballoc_event() - Check if we can stop waiting + * @sa_manager: pointer to the sa_manager + * @size: number of bytes we want to allocate + * @align: alignment we need to match + * + * Return: true if either there is a fence we can wait for or + * enough free memory to satisfy the allocation directly. + * false otherwise. + */ +static bool drm_suballoc_event(struct drm_suballoc_manager *sa_manager, + u64 size, u64 align) +{ + bool ret; + + spin_lock(&sa_manager->wq.lock); + ret = __drm_suballoc_event(sa_manager, size, align); + spin_unlock(&sa_manager->wq.lock); + return ret; +} + +static bool drm_suballoc_next_hole(struct drm_suballoc_manager *sa_manager, + struct dma_fence **fences, + unsigned int *tries) +{ + struct drm_suballoc *best_bo = NULL; + unsigned int i, best_idx; + u64 soffset, best, tmp; + + /* if hole points to the end of the buffer */ + if (sa_manager->hole->next == &sa_manager->olist) { + /* try again with its beginning */ + sa_manager->hole = &sa_manager->olist; + return true; + } + + soffset = drm_suballoc_hole_soffset(sa_manager); + /* to handle wrap around we add sa_manager->size */ + best = sa_manager->size * 2; + /* go over all fence list and try to find the closest sa + * of the current last + */ + for (i = 0; i < DRM_SUBALLOC_MAX_QUEUES; ++i) { + struct drm_suballoc *sa; + + fences[i] = NULL; + + if (list_empty(&sa_manager->flist[i])) + continue; + + sa = list_first_entry(&sa_manager->flist[i], + struct drm_suballoc, flist); + + if (!dma_fence_is_signaled(sa->fence)) { + fences[i] = sa->fence; + continue; + } + + /* limit the number of tries each freelist gets */ + if (tries[i] > 2) + continue; + + tmp = sa->soffset; + if (tmp < soffset) { + /* wrap around, pretend it's after */ + tmp += sa_manager->size; + } + tmp -= soffset; + if (tmp < best) { + /* this sa bo is the closest one */ + best = tmp; + best_idx = i; + best_bo = sa; + } + } + + if (best_bo) { + ++tries[best_idx]; + sa_manager->hole = best_bo->olist.prev; + + /* + * We know that this one is signaled, + * so it's safe to remove it. + */ + drm_suballoc_remove_locked(best_bo); + return true; + } + return false; +} + +/** + * drm_suballoc_new() - Make a suballocation. + * @sa_manager: pointer to the sa_manager + * @size: number of bytes we want to suballocate. + * @gfp: gfp flags used for memory allocation. Typically GFP_KERNEL but + * the argument is provided for suballocations from reclaim context or + * where the caller wants to avoid pipelining rather than wait for + * reclaim. + * @intr: Whether to perform waits interruptible. This should typically + * always be true, unless the caller needs to propagate a + * non-interruptible context from above layers. + * @align: Alignment. Must not exceed the default manager alignment. + * If @align is zero, then the manager alignment is used. + * + * Try to make a suballocation of size @size, which will be rounded + * up to the alignment specified in specified in drm_suballoc_manager_init(). + * + * Return: a new suballocated bo, or an ERR_PTR. + */ +struct drm_suballoc * +drm_suballoc_new(struct drm_suballoc_manager *sa_manager, u64 size, + gfp_t gfp, bool intr, u64 align) +{ + struct dma_fence *fences[DRM_SUBALLOC_MAX_QUEUES]; + unsigned int tries[DRM_SUBALLOC_MAX_QUEUES]; + unsigned int count; + int i, r; + struct drm_suballoc *sa; + + if (WARN_ON_ONCE(align > sa_manager->align)) + return ERR_PTR(-EINVAL); + if (WARN_ON_ONCE(size > sa_manager->size || !size)) + return ERR_PTR(-EINVAL); + + if (!align) + align = sa_manager->align; + + sa = kmalloc(sizeof(*sa), gfp); + if (!sa) + return ERR_PTR(-ENOMEM); + sa->manager = sa_manager; + sa->fence = NULL; + INIT_LIST_HEAD(&sa->olist); + INIT_LIST_HEAD(&sa->flist); + + spin_lock(&sa_manager->wq.lock); + do { + for (i = 0; i < DRM_SUBALLOC_MAX_QUEUES; ++i) + tries[i] = 0; + + do { + drm_suballoc_try_free(sa_manager); + + if (drm_suballoc_try_alloc(sa_manager, sa, + size, align)) { + spin_unlock(&sa_manager->wq.lock); + return sa; + } + + /* see if we can skip over some allocations */ + } while (drm_suballoc_next_hole(sa_manager, fences, tries)); + + for (i = 0, count = 0; i < DRM_SUBALLOC_MAX_QUEUES; ++i) + if (fences[i]) + fences[count++] = dma_fence_get(fences[i]); + + if (count) { + long t; + + spin_unlock(&sa_manager->wq.lock); + t = dma_fence_wait_any_timeout(fences, count, intr, + MAX_SCHEDULE_TIMEOUT, + NULL); + for (i = 0; i < count; ++i) + dma_fence_put(fences[i]); + + r = (t > 0) ? 0 : t; + spin_lock(&sa_manager->wq.lock); + } else if (intr) { + /* if we have nothing to wait for block */ + r = wait_event_interruptible_locked + (sa_manager->wq, + __drm_suballoc_event(sa_manager, size, align)); + } else { + spin_unlock(&sa_manager->wq.lock); + wait_event(sa_manager->wq, + drm_suballoc_event(sa_manager, size, align)); + r = 0; + spin_lock(&sa_manager->wq.lock); + } + } while (!r); + + spin_unlock(&sa_manager->wq.lock); + kfree(sa); + return ERR_PTR(r); +} +EXPORT_SYMBOL(drm_suballoc_new); + +/** + * drm_suballoc_free - Free a suballocation + * @suballoc: pointer to the suballocation + * @fence: fence that signals when suballocation is idle + * + * Free the suballocation. The suballocation can be re-used after @fence signals. + */ +void drm_suballoc_free(struct drm_suballoc *suballoc, + struct dma_fence *fence) +{ + struct drm_suballoc_manager *sa_manager; + + if (!suballoc) + return; + + sa_manager = suballoc->manager; + + spin_lock(&sa_manager->wq.lock); + if (fence && !dma_fence_is_signaled(fence)) { + u64 idx; + + suballoc->fence = dma_fence_get(fence); + idx = fence->context % DRM_SUBALLOC_MAX_QUEUES; + list_add_tail(&suballoc->flist, &sa_manager->flist[idx]); + } else { + drm_suballoc_remove_locked(suballoc); + } + wake_up_all_locked(&sa_manager->wq); + spin_unlock(&sa_manager->wq.lock); +} +EXPORT_SYMBOL(drm_suballoc_free); + +#ifdef CONFIG_DEBUG_FS +void drm_suballoc_dump_debug_info(struct drm_suballoc_manager *sa_manager, + struct drm_printer *p, u64 suballoc_base) +{ + struct drm_suballoc *i; + + spin_lock(&sa_manager->wq.lock); + list_for_each_entry(i, &sa_manager->olist, olist) { + u64 soffset = i->soffset; + u64 eoffset = i->eoffset; + + if (&i->olist == sa_manager->hole) + drm_puts(p, ">"); + else + drm_puts(p, " "); + + drm_printf(p, "[0x%010llx 0x%010llx] size %8lld", + suballoc_base + soffset, suballoc_base + eoffset, + eoffset - soffset); + + if (i->fence) + drm_printf(p, " protected by 0x%016llx on context %llu", + i->fence->seqno, i->fence->context); + + drm_puts(p, "\n"); + } + spin_unlock(&sa_manager->wq.lock); +} +EXPORT_SYMBOL(drm_suballoc_dump_debug_info); +#endif +MODULE_AUTHOR("Multiple"); +MODULE_DESCRIPTION("Range suballocator helper"); +MODULE_LICENSE("Dual MIT/GPL"); diff --git a/include/drm/drm_suballoc.h b/include/drm/drm_suballoc.h new file mode 100644 index 000000000000..a737f996e5ff --- /dev/null +++ b/include/drm/drm_suballoc.h @@ -0,0 +1,106 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ +/* + * Copyright 2011 Red Hat Inc. + * Copyright © 2022 Intel Corporation + */ +#ifndef _DRM_SUBALLOC_H_ +#define _DRM_SUBALLOC_H_ + +#include + +#include +#include + +#define DRM_SUBALLOC_MAX_QUEUES 32 +/** + * struct drm_suballoc_manager - fenced range allocations + * @wq: Wait queue for sleeping allocations on contention. + * @hole: Pointer to first hole node. + * @olist: List of allocated ranges. + * @flist: Array[fence context hash] of queues of fenced allocated ranges. + * @size: Size of the managed range. + * @align: Default alignment for the managed range. + */ +struct drm_suballoc_manager { + wait_queue_head_t wq; + struct list_head *hole; + struct list_head olist; + struct list_head flist[DRM_SUBALLOC_MAX_QUEUES]; + u64 size; + u64 align; +}; + +/** + * struct drm_suballoc - Sub-allocated range + * @olist: List link for list of allocated ranges. + * @flist: List linkk for the manager fenced allocated ranges queues. + * @manager: The drm_suballoc_manager. + * @soffset: Start offset. + * @eoffset: End offset + 1 so that @eoffset - @soffset = size. + * @dma_fence: The fence protecting the allocation. + */ +struct drm_suballoc { + struct list_head olist; + struct list_head flist; + struct drm_suballoc_manager *manager; + u64 soffset; + u64 eoffset; + struct dma_fence *fence; +}; + +void drm_suballoc_manager_init(struct drm_suballoc_manager *sa_manager, + u64 size, u64 align); + +void drm_suballoc_manager_fini(struct drm_suballoc_manager *sa_manager); + +struct drm_suballoc * +drm_suballoc_new(struct drm_suballoc_manager *sa_manager, u64 size, gfp_t gfp, + bool intr, u64 align); + +void drm_suballoc_free(struct drm_suballoc *sa, struct dma_fence *fence); + +/** + * drm_suballoc_soffset - Range start. + * @sa: The struct drm_suballoc. + * + * Return: The start of the allocated range. + */ +static inline u64 drm_suballoc_soffset(struct drm_suballoc *sa) +{ + return sa->soffset; +} + +/** + * drm_suballoc_eoffset - Range end. + * @sa: The struct drm_suballoc. + * + * Return: The end of the allocated range + 1. + */ +static inline u64 drm_suballoc_eoffset(struct drm_suballoc *sa) +{ + return sa->eoffset; +} + +/** + * drm_suballoc_size - Range size. + * @sa: The struct drm_suballoc. + * + * Return: The size of the allocated range. + */ +static inline u64 drm_suballoc_size(struct drm_suballoc *sa) +{ + return sa->eoffset - sa->soffset; +} + +#ifdef CONFIG_DEBUG_FS +void drm_suballoc_dump_debug_info(struct drm_suballoc_manager *sa_manager, + struct drm_printer *p, u64 suballoc_base); +#else +static inline void +drm_suballoc_dump_debug_info(struct drm_suballoc_manager *sa_manager, + struct drm_printer *p, u64 suballoc_base) +{ } + +#endif + +#endif /* _DRM_SUBALLOC_H_ */