From patchwork Thu Feb 23 14:25:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Thomas_Hellstr=C3=B6m?= X-Patchwork-Id: 13150485 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 7E952C64ED6 for ; Thu, 23 Feb 2023 14:55:02 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 87C1E10EBC0; Thu, 23 Feb 2023 14:55:01 +0000 (UTC) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1B1D510EBC0; Thu, 23 Feb 2023 14:55:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1677164100; x=1708700100; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Kbj7EJPNOEetxcjnwrLxWk2fhJZaaE245lSnfnnb0NE=; b=JMDiu3AQGsJKGoHZzFWPrfA0HkRsrNbUQ6w4HUc/oeYC0iAskqxgo9gG Br44zAzjuF8VcQnHiAKQLbHwvcU/TVo3xRXeat70R6i9f2xB3KKxlRSG/ Kr3Xjl0++5wNe3LmZ4SbZ7ZX0b6QedmWA/K2tyAMx82iCwRas8N01X7Up UXsPtVNGciOwf9pEA4NbKIwOXr3moue1sNGBLLsY3zbQnZNFI8NkH+8gn lSCS3ixi0Gu/3zaDPOei8nTRTiD9pRmfDVghKCRF1HE+pT2B+12nCbsdl ONxGV10auF0nXOB8u68E78keXDz0QykWc7yZUnEumvbfuqnAhuYH1RMkZ w==; X-IronPort-AV: E=McAfee;i="6500,9779,10630"; a="321392778" X-IronPort-AV: E=Sophos;i="5.97,320,1669104000"; d="scan'208";a="321392778" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Feb 2023 06:26:07 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10630"; a="622349641" X-IronPort-AV: E=Sophos;i="5.97,320,1669104000"; d="scan'208";a="622349641" Received: from skallurr-mobl1.ger.corp.intel.com (HELO thellstr-mobl1.intel.com) ([10.249.254.84]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Feb 2023 06:26:04 -0800 From: =?utf-8?q?Thomas_Hellstr=C3=B6m?= To: dri-devel@lists.freedesktop.org Subject: [PATCH v3 1/3] drm/suballoc: Extract amdgpu_sa.c as generic suballocation helper Date: Thu, 23 Feb 2023 15:25:29 +0100 Message-Id: <20230223142531.8446-2-thomas.hellstrom@linux.intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230223142531.8446-1-thomas.hellstrom@linux.intel.com> References: <20230223142531.8446-1-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 , intel-gfx@lists.freedesktop.org, =?utf-8?q?Christian_K=C3=B6nig?= , 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. - Added / Modified documentation. - 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. - Add and document gfp, intr and align arguments to drm_suballoc_new(). - Use drm_printer for debug output. v3: - Remove stale author info (Christian König) Signed-off-by: Maarten Lankhorst Co-developed-by: Thomas Hellström Signed-off-by: Thomas Hellström Reviewed-by: Christian König --- drivers/gpu/drm/Kconfig | 4 + drivers/gpu/drm/Makefile | 3 + drivers/gpu/drm/drm_suballoc.c | 453 +++++++++++++++++++++++++++++++++ include/drm/drm_suballoc.h | 106 ++++++++ 4 files changed, 566 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..8e705d1df150 --- /dev/null +++ b/drivers/gpu/drm/drm_suballoc.c @@ -0,0 +1,453 @@ +// 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. + * + */ +/* 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_ */ From patchwork Thu Feb 23 14:25:30 2023 Content-Type: text/plain; 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23 Feb 2023 06:26:10 -0800 From: =?utf-8?q?Thomas_Hellstr=C3=B6m?= To: dri-devel@lists.freedesktop.org Subject: [PATCH v3 2/3] drm/amd: Convert amdgpu to use suballocation helper. Date: Thu, 23 Feb 2023 15:25:30 +0100 Message-Id: <20230223142531.8446-3-thomas.hellstrom@linux.intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230223142531.8446-1-thomas.hellstrom@linux.intel.com> References: <20230223142531.8446-1-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 , intel-gfx@lists.freedesktop.org, =?utf-8?q?Christian_K=C3=B6nig?= , Dave Airlie , intel-xe@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Maarten Lankhorst Now that we have a generic suballocation helper, Use it in amdgpu. For lines that get moved or changed, also fix up pre-existing style issues. Signed-off-by: Maarten Lankhorst Co-developed-by: Thomas Hellström Signed-off-by: Thomas Hellström Reviewed-by: Christian König --- drivers/gpu/drm/Kconfig | 1 + drivers/gpu/drm/amd/amdgpu/Kconfig | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu.h | 26 +- drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c | 5 +- drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 23 +- drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 3 +- drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c | 324 ++------------------- 7 files changed, 46 insertions(+), 337 deletions(-) diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 8fbe57407c60..73ddfdf3a894 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -77,6 +77,7 @@ config DRM_KUNIT_TEST select DRM_DISPLAY_HELPER select DRM_LIB_RANDOM select DRM_KMS_HELPER + select DRM_SUBALLOC_HELPER select DRM_BUDDY select DRM_EXPORT_FOR_TESTS if m select DRM_KUNIT_TEST_HELPERS diff --git a/drivers/gpu/drm/amd/amdgpu/Kconfig b/drivers/gpu/drm/amd/amdgpu/Kconfig index 5341b6b242c3..0ed12171450b 100644 --- a/drivers/gpu/drm/amd/amdgpu/Kconfig +++ b/drivers/gpu/drm/amd/amdgpu/Kconfig @@ -18,6 +18,7 @@ config DRM_AMDGPU select BACKLIGHT_CLASS_DEVICE select INTERVAL_TREE select DRM_BUDDY + select DRM_SUBALLOC_HELPER # amdgpu depends on ACPI_VIDEO when ACPI is enabled, for select to work # ACPI_VIDEO's dependencies must also be selected. select INPUT if ACPI diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index 164141bc8b4a..dda88090f044 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -424,29 +424,11 @@ struct amdgpu_clock { * alignment). */ -#define AMDGPU_SA_NUM_FENCE_LISTS 32 - struct amdgpu_sa_manager { - wait_queue_head_t wq; - struct amdgpu_bo *bo; - struct list_head *hole; - struct list_head flist[AMDGPU_SA_NUM_FENCE_LISTS]; - struct list_head olist; - unsigned size; - uint64_t gpu_addr; - void *cpu_ptr; - uint32_t domain; - uint32_t align; -}; - -/* sub-allocation buffer */ -struct amdgpu_sa_bo { - struct list_head olist; - struct list_head flist; - struct amdgpu_sa_manager *manager; - unsigned soffset; - unsigned eoffset; - struct dma_fence *fence; + struct drm_suballoc_manager base; + struct amdgpu_bo *bo; + uint64_t gpu_addr; + void *cpu_ptr; }; int amdgpu_fence_slab_init(void); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c index bcccc348dbe2..df7eb0b7c4b9 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c @@ -69,7 +69,7 @@ int amdgpu_ib_get(struct amdgpu_device *adev, struct amdgpu_vm *vm, if (size) { r = amdgpu_sa_bo_new(&adev->ib_pools[pool_type], - &ib->sa_bo, size, 256); + &ib->sa_bo, size); if (r) { dev_err(adev->dev, "failed to get a new IB (%d)\n", r); return r; @@ -309,8 +309,7 @@ int amdgpu_ib_pool_init(struct amdgpu_device *adev) for (i = 0; i < AMDGPU_IB_POOL_MAX; i++) { r = amdgpu_sa_bo_manager_init(adev, &adev->ib_pools[i], - AMDGPU_IB_POOL_SIZE, - AMDGPU_GPU_PAGE_SIZE, + AMDGPU_IB_POOL_SIZE, 256, AMDGPU_GEM_DOMAIN_GTT); if (r) goto error; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h index 93207badf83f..5a85726ce853 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h @@ -336,15 +336,22 @@ uint32_t amdgpu_bo_get_preferred_domain(struct amdgpu_device *adev, /* * sub allocation */ +static inline struct amdgpu_sa_manager * +to_amdgpu_sa_manager(struct drm_suballoc_manager *manager) +{ + return container_of(manager, struct amdgpu_sa_manager, base); +} -static inline uint64_t amdgpu_sa_bo_gpu_addr(struct amdgpu_sa_bo *sa_bo) +static inline uint64_t amdgpu_sa_bo_gpu_addr(struct drm_suballoc *sa_bo) { - return sa_bo->manager->gpu_addr + sa_bo->soffset; + return to_amdgpu_sa_manager(sa_bo->manager)->gpu_addr + + drm_suballoc_soffset(sa_bo); } -static inline void * amdgpu_sa_bo_cpu_addr(struct amdgpu_sa_bo *sa_bo) +static inline void *amdgpu_sa_bo_cpu_addr(struct drm_suballoc *sa_bo) { - return sa_bo->manager->cpu_ptr + sa_bo->soffset; + return to_amdgpu_sa_manager(sa_bo->manager)->cpu_ptr + + drm_suballoc_soffset(sa_bo); } int amdgpu_sa_bo_manager_init(struct amdgpu_device *adev, @@ -355,11 +362,11 @@ void amdgpu_sa_bo_manager_fini(struct amdgpu_device *adev, int amdgpu_sa_bo_manager_start(struct amdgpu_device *adev, struct amdgpu_sa_manager *sa_manager); int amdgpu_sa_bo_new(struct amdgpu_sa_manager *sa_manager, - struct amdgpu_sa_bo **sa_bo, - unsigned size, unsigned align); + struct drm_suballoc **sa_bo, + unsigned int size); void amdgpu_sa_bo_free(struct amdgpu_device *adev, - struct amdgpu_sa_bo **sa_bo, - struct dma_fence *fence); + struct drm_suballoc **sa_bo, + struct dma_fence *fence); #if defined(CONFIG_DEBUG_FS) void amdgpu_sa_bo_dump_debug_info(struct amdgpu_sa_manager *sa_manager, struct seq_file *m); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h index 3989e755a5b4..018f36b10de8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h @@ -27,6 +27,7 @@ #include #include #include +#include struct amdgpu_device; struct amdgpu_ring; @@ -92,7 +93,7 @@ enum amdgpu_ib_pool_type { }; struct amdgpu_ib { - struct amdgpu_sa_bo *sa_bo; + struct drm_suballoc *sa_bo; uint32_t length_dw; uint64_t gpu_addr; uint32_t *ptr; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c index 524d10b21041..c6b4337eb20c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c @@ -44,327 +44,63 @@ #include "amdgpu.h" -static void amdgpu_sa_bo_remove_locked(struct amdgpu_sa_bo *sa_bo); -static void amdgpu_sa_bo_try_free(struct amdgpu_sa_manager *sa_manager); - int amdgpu_sa_bo_manager_init(struct amdgpu_device *adev, struct amdgpu_sa_manager *sa_manager, - unsigned size, u32 align, u32 domain) + unsigned int size, u32 suballoc_align, u32 domain) { - int i, r; - - init_waitqueue_head(&sa_manager->wq); - sa_manager->bo = NULL; - sa_manager->size = size; - sa_manager->domain = domain; - sa_manager->align = align; - sa_manager->hole = &sa_manager->olist; - INIT_LIST_HEAD(&sa_manager->olist); - for (i = 0; i < AMDGPU_SA_NUM_FENCE_LISTS; ++i) - INIT_LIST_HEAD(&sa_manager->flist[i]); + int r; - r = amdgpu_bo_create_kernel(adev, size, align, domain, &sa_manager->bo, - &sa_manager->gpu_addr, &sa_manager->cpu_ptr); + r = amdgpu_bo_create_kernel(adev, size, AMDGPU_GPU_PAGE_SIZE, domain, + &sa_manager->bo, &sa_manager->gpu_addr, + &sa_manager->cpu_ptr); if (r) { dev_err(adev->dev, "(%d) failed to allocate bo for manager\n", r); return r; } - memset(sa_manager->cpu_ptr, 0, sa_manager->size); + memset(sa_manager->cpu_ptr, 0, size); + drm_suballoc_manager_init(&sa_manager->base, size, suballoc_align); return r; } void amdgpu_sa_bo_manager_fini(struct amdgpu_device *adev, struct amdgpu_sa_manager *sa_manager) { - struct amdgpu_sa_bo *sa_bo, *tmp; - if (sa_manager->bo == NULL) { dev_err(adev->dev, "no bo for sa manager\n"); return; } - if (!list_empty(&sa_manager->olist)) { - sa_manager->hole = &sa_manager->olist, - amdgpu_sa_bo_try_free(sa_manager); - if (!list_empty(&sa_manager->olist)) { - dev_err(adev->dev, "sa_manager is not empty, clearing anyway\n"); - } - } - list_for_each_entry_safe(sa_bo, tmp, &sa_manager->olist, olist) { - amdgpu_sa_bo_remove_locked(sa_bo); - } + drm_suballoc_manager_fini(&sa_manager->base); amdgpu_bo_free_kernel(&sa_manager->bo, &sa_manager->gpu_addr, &sa_manager->cpu_ptr); - sa_manager->size = 0; } -static void amdgpu_sa_bo_remove_locked(struct amdgpu_sa_bo *sa_bo) -{ - struct amdgpu_sa_manager *sa_manager = sa_bo->manager; - if (sa_manager->hole == &sa_bo->olist) { - sa_manager->hole = sa_bo->olist.prev; - } - list_del_init(&sa_bo->olist); - list_del_init(&sa_bo->flist); - dma_fence_put(sa_bo->fence); - kfree(sa_bo); -} - -static void amdgpu_sa_bo_try_free(struct amdgpu_sa_manager *sa_manager) +int amdgpu_sa_bo_new(struct amdgpu_sa_manager *sa_manager, + struct drm_suballoc **sa_bo, + unsigned int size) { - struct amdgpu_sa_bo *sa_bo, *tmp; + struct drm_suballoc *sa = drm_suballoc_new(&sa_manager->base, size, + GFP_KERNEL, true, 0); - if (sa_manager->hole->next == &sa_manager->olist) - return; + if (IS_ERR(sa)) { + *sa_bo = NULL; - sa_bo = list_entry(sa_manager->hole->next, struct amdgpu_sa_bo, olist); - list_for_each_entry_safe_from(sa_bo, tmp, &sa_manager->olist, olist) { - if (sa_bo->fence == NULL || - !dma_fence_is_signaled(sa_bo->fence)) { - return; - } - amdgpu_sa_bo_remove_locked(sa_bo); + return PTR_ERR(sa); } -} -static inline unsigned amdgpu_sa_bo_hole_soffset(struct amdgpu_sa_manager *sa_manager) -{ - struct list_head *hole = sa_manager->hole; - - if (hole != &sa_manager->olist) { - return list_entry(hole, struct amdgpu_sa_bo, olist)->eoffset; - } + *sa_bo = sa; return 0; } -static inline unsigned amdgpu_sa_bo_hole_eoffset(struct amdgpu_sa_manager *sa_manager) -{ - struct list_head *hole = sa_manager->hole; - - if (hole->next != &sa_manager->olist) { - return list_entry(hole->next, struct amdgpu_sa_bo, olist)->soffset; - } - return sa_manager->size; -} - -static bool amdgpu_sa_bo_try_alloc(struct amdgpu_sa_manager *sa_manager, - struct amdgpu_sa_bo *sa_bo, - unsigned size, unsigned align) -{ - unsigned soffset, eoffset, wasted; - - soffset = amdgpu_sa_bo_hole_soffset(sa_manager); - eoffset = amdgpu_sa_bo_hole_eoffset(sa_manager); - wasted = (align - (soffset % align)) % align; - - if ((eoffset - soffset) >= (size + wasted)) { - soffset += wasted; - - sa_bo->manager = sa_manager; - sa_bo->soffset = soffset; - sa_bo->eoffset = soffset + size; - list_add(&sa_bo->olist, sa_manager->hole); - INIT_LIST_HEAD(&sa_bo->flist); - sa_manager->hole = &sa_bo->olist; - return true; - } - return false; -} - -/** - * amdgpu_sa_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 - * - * Check if either there is a fence we can wait for or - * enough free memory to satisfy the allocation directly - */ -static bool amdgpu_sa_event(struct amdgpu_sa_manager *sa_manager, - unsigned size, unsigned align) -{ - unsigned soffset, eoffset, wasted; - int i; - - for (i = 0; i < AMDGPU_SA_NUM_FENCE_LISTS; ++i) - if (!list_empty(&sa_manager->flist[i])) - return true; - - soffset = amdgpu_sa_bo_hole_soffset(sa_manager); - eoffset = amdgpu_sa_bo_hole_eoffset(sa_manager); - wasted = (align - (soffset % align)) % align; - - if ((eoffset - soffset) >= (size + wasted)) { - return true; - } - - return false; -} - -static bool amdgpu_sa_bo_next_hole(struct amdgpu_sa_manager *sa_manager, - struct dma_fence **fences, - unsigned *tries) -{ - struct amdgpu_sa_bo *best_bo = NULL; - unsigned i, 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 = amdgpu_sa_bo_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_bo - * of the current last - */ - for (i = 0; i < AMDGPU_SA_NUM_FENCE_LISTS; ++i) { - struct amdgpu_sa_bo *sa_bo; - - fences[i] = NULL; - - if (list_empty(&sa_manager->flist[i])) - continue; - - sa_bo = list_first_entry(&sa_manager->flist[i], - struct amdgpu_sa_bo, flist); - - if (!dma_fence_is_signaled(sa_bo->fence)) { - fences[i] = sa_bo->fence; - continue; - } - - /* limit the number of tries each ring gets */ - if (tries[i] > 2) { - continue; - } - - tmp = sa_bo->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_bo = sa_bo; - } - } - - if (best_bo) { - uint32_t idx = best_bo->fence->context; - - idx %= AMDGPU_SA_NUM_FENCE_LISTS; - ++tries[idx]; - sa_manager->hole = best_bo->olist.prev; - - /* we knew that this one is signaled, - so it's save to remote it */ - amdgpu_sa_bo_remove_locked(best_bo); - return true; - } - return false; -} - -int amdgpu_sa_bo_new(struct amdgpu_sa_manager *sa_manager, - struct amdgpu_sa_bo **sa_bo, - unsigned size, unsigned align) -{ - struct dma_fence *fences[AMDGPU_SA_NUM_FENCE_LISTS]; - unsigned tries[AMDGPU_SA_NUM_FENCE_LISTS]; - unsigned count; - int i, r; - signed long t; - - if (WARN_ON_ONCE(align > sa_manager->align)) - return -EINVAL; - - if (WARN_ON_ONCE(size > sa_manager->size)) - return -EINVAL; - - *sa_bo = kmalloc(sizeof(struct amdgpu_sa_bo), GFP_KERNEL); - if (!(*sa_bo)) - return -ENOMEM; - (*sa_bo)->manager = sa_manager; - (*sa_bo)->fence = NULL; - INIT_LIST_HEAD(&(*sa_bo)->olist); - INIT_LIST_HEAD(&(*sa_bo)->flist); - - spin_lock(&sa_manager->wq.lock); - do { - for (i = 0; i < AMDGPU_SA_NUM_FENCE_LISTS; ++i) - tries[i] = 0; - - do { - amdgpu_sa_bo_try_free(sa_manager); - - if (amdgpu_sa_bo_try_alloc(sa_manager, *sa_bo, - size, align)) { - spin_unlock(&sa_manager->wq.lock); - return 0; - } - - /* see if we can skip over some allocations */ - } while (amdgpu_sa_bo_next_hole(sa_manager, fences, tries)); - - for (i = 0, count = 0; i < AMDGPU_SA_NUM_FENCE_LISTS; ++i) - if (fences[i]) - fences[count++] = dma_fence_get(fences[i]); - - if (count) { - spin_unlock(&sa_manager->wq.lock); - t = dma_fence_wait_any_timeout(fences, count, false, - 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 we have nothing to wait for block */ - r = wait_event_interruptible_locked( - sa_manager->wq, - amdgpu_sa_event(sa_manager, size, align) - ); - } - - } while (!r); - - spin_unlock(&sa_manager->wq.lock); - kfree(*sa_bo); - *sa_bo = NULL; - return r; -} - -void amdgpu_sa_bo_free(struct amdgpu_device *adev, struct amdgpu_sa_bo **sa_bo, +void amdgpu_sa_bo_free(struct amdgpu_device *adev, struct drm_suballoc **sa_bo, struct dma_fence *fence) { - struct amdgpu_sa_manager *sa_manager; - if (sa_bo == NULL || *sa_bo == NULL) { return; } - sa_manager = (*sa_bo)->manager; - spin_lock(&sa_manager->wq.lock); - if (fence && !dma_fence_is_signaled(fence)) { - uint32_t idx; - - (*sa_bo)->fence = dma_fence_get(fence); - idx = fence->context % AMDGPU_SA_NUM_FENCE_LISTS; - list_add_tail(&(*sa_bo)->flist, &sa_manager->flist[idx]); - } else { - amdgpu_sa_bo_remove_locked(*sa_bo); - } - wake_up_all_locked(&sa_manager->wq); - spin_unlock(&sa_manager->wq.lock); + drm_suballoc_free(*sa_bo, fence); *sa_bo = NULL; } @@ -373,26 +109,8 @@ void amdgpu_sa_bo_free(struct amdgpu_device *adev, struct amdgpu_sa_bo **sa_bo, void amdgpu_sa_bo_dump_debug_info(struct amdgpu_sa_manager *sa_manager, struct seq_file *m) { - struct amdgpu_sa_bo *i; - - spin_lock(&sa_manager->wq.lock); - list_for_each_entry(i, &sa_manager->olist, olist) { - uint64_t soffset = i->soffset + sa_manager->gpu_addr; - uint64_t eoffset = i->eoffset + sa_manager->gpu_addr; - if (&i->olist == sa_manager->hole) { - seq_printf(m, ">"); - } else { - seq_printf(m, " "); - } - seq_printf(m, "[0x%010llx 0x%010llx] size %8lld", - soffset, eoffset, eoffset - soffset); + struct drm_printer p = drm_seq_file_printer(m); - if (i->fence) - seq_printf(m, " protected by 0x%016llx on context %llu", - i->fence->seqno, i->fence->context); - - seq_printf(m, "\n"); - } - spin_unlock(&sa_manager->wq.lock); + drm_suballoc_dump_debug_info(&sa_manager->base, &p, sa_manager->gpu_addr); } #endif From patchwork Thu Feb 23 14:25:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Thomas_Hellstr=C3=B6m?= X-Patchwork-Id: 13150487 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 5BF84C678D5 for ; Thu, 23 Feb 2023 14:55:12 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4D15710EBCA; Thu, 23 Feb 2023 14:55:11 +0000 (UTC) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id 85CCC10EBC6; Thu, 23 Feb 2023 14:55:08 +0000 (UTC) DKIM-Signature: v=1; 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d="scan'208";a="622349657" Received: from skallurr-mobl1.ger.corp.intel.com (HELO thellstr-mobl1.intel.com) ([10.249.254.84]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Feb 2023 06:26:14 -0800 From: =?utf-8?q?Thomas_Hellstr=C3=B6m?= To: dri-devel@lists.freedesktop.org Subject: [PATCH v3 3/3] drm/radeon: Use the drm suballocation manager implementation. Date: Thu, 23 Feb 2023 15:25:31 +0100 Message-Id: <20230223142531.8446-4-thomas.hellstrom@linux.intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230223142531.8446-1-thomas.hellstrom@linux.intel.com> References: <20230223142531.8446-1-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 , intel-gfx@lists.freedesktop.org, =?utf-8?q?Christian_K=C3=B6nig?= , Dave Airlie , intel-xe@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Maarten Lankhorst Use the generic suballocation helper for radeon. v3: - Select the suballoc helper in Kconfig (Thomas). Signed-off-by: Maarten Lankhorst Co-developed-by: Thomas Hellström Signed-off-by: Thomas Hellström Reviewed-by: Christian König --- drivers/gpu/drm/radeon/Kconfig | 1 + drivers/gpu/drm/radeon/radeon.h | 55 +--- drivers/gpu/drm/radeon/radeon_ib.c | 12 +- drivers/gpu/drm/radeon/radeon_object.h | 25 +- drivers/gpu/drm/radeon/radeon_sa.c | 316 ++-------------------- drivers/gpu/drm/radeon/radeon_semaphore.c | 4 +- 6 files changed, 57 insertions(+), 356 deletions(-) diff --git a/drivers/gpu/drm/radeon/Kconfig b/drivers/gpu/drm/radeon/Kconfig index 62a596d3a891..e19d77d58810 100644 --- a/drivers/gpu/drm/radeon/Kconfig +++ b/drivers/gpu/drm/radeon/Kconfig @@ -8,6 +8,7 @@ config DRM_RADEON select DRM_DISPLAY_DP_HELPER select DRM_DISPLAY_HELPER select DRM_KMS_HELPER + select DRM_SUBALLOC_HELPER select DRM_TTM select DRM_TTM_HELPER select SND_HDA_COMPONENT if SND_HDA_CORE diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index 57e20780a458..d19a4b1c1a8f 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -79,6 +79,7 @@ #include #include +#include #include "radeon_family.h" #include "radeon_mode.h" @@ -511,52 +512,12 @@ struct radeon_bo { }; #define gem_to_radeon_bo(gobj) container_of((gobj), struct radeon_bo, tbo.base) -/* sub-allocation manager, it has to be protected by another lock. - * By conception this is an helper for other part of the driver - * like the indirect buffer or semaphore, which both have their - * locking. - * - * Principe is simple, we keep a list of sub allocation in offset - * order (first entry has offset == 0, last entry has the highest - * offset). - * - * When allocating new object we first check if there is room at - * the end total_size - (last_object_offset + last_object_size) >= - * alloc_size. If so we allocate new object there. - * - * When there is not enough room at the end, we start waiting for - * each sub object until we reach object_offset+object_size >= - * alloc_size, this object then become the sub object we return. - * - * Alignment can't be bigger than page size. - * - * Hole are not considered for allocation to keep things simple. - * Assumption is that there won't be hole (all object on same - * alignment). - */ struct radeon_sa_manager { - wait_queue_head_t wq; - struct radeon_bo *bo; - struct list_head *hole; - struct list_head flist[RADEON_NUM_RINGS]; - struct list_head olist; - unsigned size; - uint64_t gpu_addr; - void *cpu_ptr; - uint32_t domain; - uint32_t align; -}; - -struct radeon_sa_bo; - -/* sub-allocation buffer */ -struct radeon_sa_bo { - struct list_head olist; - struct list_head flist; - struct radeon_sa_manager *manager; - unsigned soffset; - unsigned eoffset; - struct radeon_fence *fence; + struct drm_suballoc_manager base; + struct radeon_bo *bo; + uint64_t gpu_addr; + void *cpu_ptr; + u32 domain; }; /* @@ -587,7 +548,7 @@ int radeon_mode_dumb_mmap(struct drm_file *filp, * Semaphores. */ struct radeon_semaphore { - struct radeon_sa_bo *sa_bo; + struct drm_suballoc *sa_bo; signed waiters; uint64_t gpu_addr; }; @@ -816,7 +777,7 @@ void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask); */ struct radeon_ib { - struct radeon_sa_bo *sa_bo; + struct drm_suballoc *sa_bo; uint32_t length_dw; uint64_t gpu_addr; uint32_t *ptr; diff --git a/drivers/gpu/drm/radeon/radeon_ib.c b/drivers/gpu/drm/radeon/radeon_ib.c index 62b116727b4f..6a45a72488f9 100644 --- a/drivers/gpu/drm/radeon/radeon_ib.c +++ b/drivers/gpu/drm/radeon/radeon_ib.c @@ -61,7 +61,7 @@ int radeon_ib_get(struct radeon_device *rdev, int ring, { int r; - r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, &ib->sa_bo, size, 256); + r = radeon_sa_bo_new(&rdev->ring_tmp_bo, &ib->sa_bo, size, 256); if (r) { dev_err(rdev->dev, "failed to get a new IB (%d)\n", r); return r; @@ -77,7 +77,7 @@ int radeon_ib_get(struct radeon_device *rdev, int ring, /* ib pool is bound at RADEON_VA_IB_OFFSET in virtual address * space and soffset is the offset inside the pool bo */ - ib->gpu_addr = ib->sa_bo->soffset + RADEON_VA_IB_OFFSET; + ib->gpu_addr = drm_suballoc_soffset(ib->sa_bo) + RADEON_VA_IB_OFFSET; } else { ib->gpu_addr = radeon_sa_bo_gpu_addr(ib->sa_bo); } @@ -97,7 +97,7 @@ int radeon_ib_get(struct radeon_device *rdev, int ring, void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib *ib) { radeon_sync_free(rdev, &ib->sync, ib->fence); - radeon_sa_bo_free(rdev, &ib->sa_bo, ib->fence); + radeon_sa_bo_free(&ib->sa_bo, ib->fence); radeon_fence_unref(&ib->fence); } @@ -201,8 +201,7 @@ int radeon_ib_pool_init(struct radeon_device *rdev) if (rdev->family >= CHIP_BONAIRE) { r = radeon_sa_bo_manager_init(rdev, &rdev->ring_tmp_bo, - RADEON_IB_POOL_SIZE*64*1024, - RADEON_GPU_PAGE_SIZE, + RADEON_IB_POOL_SIZE*64*1024, 256, RADEON_GEM_DOMAIN_GTT, RADEON_GEM_GTT_WC); } else { @@ -210,8 +209,7 @@ int radeon_ib_pool_init(struct radeon_device *rdev) * to the command stream checking */ r = radeon_sa_bo_manager_init(rdev, &rdev->ring_tmp_bo, - RADEON_IB_POOL_SIZE*64*1024, - RADEON_GPU_PAGE_SIZE, + RADEON_IB_POOL_SIZE*64*1024, 256, RADEON_GEM_DOMAIN_GTT, 0); } if (r) { diff --git a/drivers/gpu/drm/radeon/radeon_object.h b/drivers/gpu/drm/radeon/radeon_object.h index 0a6ef49e990a..39cc87a59a9a 100644 --- a/drivers/gpu/drm/radeon/radeon_object.h +++ b/drivers/gpu/drm/radeon/radeon_object.h @@ -169,15 +169,22 @@ extern void radeon_bo_fence(struct radeon_bo *bo, struct radeon_fence *fence, /* * sub allocation */ +static inline struct radeon_sa_manager * +to_radeon_sa_manager(struct drm_suballoc_manager *manager) +{ + return container_of(manager, struct radeon_sa_manager, base); +} -static inline uint64_t radeon_sa_bo_gpu_addr(struct radeon_sa_bo *sa_bo) +static inline uint64_t radeon_sa_bo_gpu_addr(struct drm_suballoc *sa_bo) { - return sa_bo->manager->gpu_addr + sa_bo->soffset; + return to_radeon_sa_manager(sa_bo->manager)->gpu_addr + + drm_suballoc_soffset(sa_bo); } -static inline void * radeon_sa_bo_cpu_addr(struct radeon_sa_bo *sa_bo) +static inline void *radeon_sa_bo_cpu_addr(struct drm_suballoc *sa_bo) { - return sa_bo->manager->cpu_ptr + sa_bo->soffset; + return to_radeon_sa_manager(sa_bo->manager)->cpu_ptr + + drm_suballoc_soffset(sa_bo); } extern int radeon_sa_bo_manager_init(struct radeon_device *rdev, @@ -190,12 +197,10 @@ extern int radeon_sa_bo_manager_start(struct radeon_device *rdev, struct radeon_sa_manager *sa_manager); extern int radeon_sa_bo_manager_suspend(struct radeon_device *rdev, struct radeon_sa_manager *sa_manager); -extern int radeon_sa_bo_new(struct radeon_device *rdev, - struct radeon_sa_manager *sa_manager, - struct radeon_sa_bo **sa_bo, - unsigned size, unsigned align); -extern void radeon_sa_bo_free(struct radeon_device *rdev, - struct radeon_sa_bo **sa_bo, +extern int radeon_sa_bo_new(struct radeon_sa_manager *sa_manager, + struct drm_suballoc **sa_bo, + unsigned int size, unsigned int align); +extern void radeon_sa_bo_free(struct drm_suballoc **sa_bo, struct radeon_fence *fence); #if defined(CONFIG_DEBUG_FS) extern void radeon_sa_bo_dump_debug_info(struct radeon_sa_manager *sa_manager, diff --git a/drivers/gpu/drm/radeon/radeon_sa.c b/drivers/gpu/drm/radeon/radeon_sa.c index 0981948bd9ed..c87a57c9c592 100644 --- a/drivers/gpu/drm/radeon/radeon_sa.c +++ b/drivers/gpu/drm/radeon/radeon_sa.c @@ -44,53 +44,32 @@ #include "radeon.h" -static void radeon_sa_bo_remove_locked(struct radeon_sa_bo *sa_bo); -static void radeon_sa_bo_try_free(struct radeon_sa_manager *sa_manager); - int radeon_sa_bo_manager_init(struct radeon_device *rdev, struct radeon_sa_manager *sa_manager, - unsigned size, u32 align, u32 domain, u32 flags) + unsigned int size, u32 sa_align, u32 domain, + u32 flags) { - int i, r; - - init_waitqueue_head(&sa_manager->wq); - sa_manager->bo = NULL; - sa_manager->size = size; - sa_manager->domain = domain; - sa_manager->align = align; - sa_manager->hole = &sa_manager->olist; - INIT_LIST_HEAD(&sa_manager->olist); - for (i = 0; i < RADEON_NUM_RINGS; ++i) { - INIT_LIST_HEAD(&sa_manager->flist[i]); - } + int r; - r = radeon_bo_create(rdev, size, align, true, + r = radeon_bo_create(rdev, size, RADEON_GPU_PAGE_SIZE, true, domain, flags, NULL, NULL, &sa_manager->bo); if (r) { dev_err(rdev->dev, "(%d) failed to allocate bo for manager\n", r); return r; } + sa_manager->domain = domain; + + drm_suballoc_manager_init(&sa_manager->base, size, sa_align); + return r; } void radeon_sa_bo_manager_fini(struct radeon_device *rdev, struct radeon_sa_manager *sa_manager) { - struct radeon_sa_bo *sa_bo, *tmp; - - if (!list_empty(&sa_manager->olist)) { - sa_manager->hole = &sa_manager->olist, - radeon_sa_bo_try_free(sa_manager); - if (!list_empty(&sa_manager->olist)) { - dev_err(rdev->dev, "sa_manager is not empty, clearing anyway\n"); - } - } - list_for_each_entry_safe(sa_bo, tmp, &sa_manager->olist, olist) { - radeon_sa_bo_remove_locked(sa_bo); - } + drm_suballoc_manager_fini(&sa_manager->base); radeon_bo_unref(&sa_manager->bo); - sa_manager->size = 0; } int radeon_sa_bo_manager_start(struct radeon_device *rdev, @@ -139,260 +118,34 @@ int radeon_sa_bo_manager_suspend(struct radeon_device *rdev, return r; } -static void radeon_sa_bo_remove_locked(struct radeon_sa_bo *sa_bo) +int radeon_sa_bo_new(struct radeon_sa_manager *sa_manager, + struct drm_suballoc **sa_bo, + unsigned int size, unsigned int align) { - struct radeon_sa_manager *sa_manager = sa_bo->manager; - if (sa_manager->hole == &sa_bo->olist) { - sa_manager->hole = sa_bo->olist.prev; - } - list_del_init(&sa_bo->olist); - list_del_init(&sa_bo->flist); - radeon_fence_unref(&sa_bo->fence); - kfree(sa_bo); -} - -static void radeon_sa_bo_try_free(struct radeon_sa_manager *sa_manager) -{ - struct radeon_sa_bo *sa_bo, *tmp; - - if (sa_manager->hole->next == &sa_manager->olist) - return; + struct drm_suballoc *sa = drm_suballoc_new(&sa_manager->base, size, + GFP_KERNEL, true, align); - sa_bo = list_entry(sa_manager->hole->next, struct radeon_sa_bo, olist); - list_for_each_entry_safe_from(sa_bo, tmp, &sa_manager->olist, olist) { - if (sa_bo->fence == NULL || !radeon_fence_signaled(sa_bo->fence)) { - return; - } - radeon_sa_bo_remove_locked(sa_bo); + if (IS_ERR(sa)) { + *sa_bo = NULL; + return PTR_ERR(sa); } -} -static inline unsigned radeon_sa_bo_hole_soffset(struct radeon_sa_manager *sa_manager) -{ - struct list_head *hole = sa_manager->hole; - - if (hole != &sa_manager->olist) { - return list_entry(hole, struct radeon_sa_bo, olist)->eoffset; - } + *sa_bo = sa; return 0; } -static inline unsigned radeon_sa_bo_hole_eoffset(struct radeon_sa_manager *sa_manager) -{ - struct list_head *hole = sa_manager->hole; - - if (hole->next != &sa_manager->olist) { - return list_entry(hole->next, struct radeon_sa_bo, olist)->soffset; - } - return sa_manager->size; -} - -static bool radeon_sa_bo_try_alloc(struct radeon_sa_manager *sa_manager, - struct radeon_sa_bo *sa_bo, - unsigned size, unsigned align) -{ - unsigned soffset, eoffset, wasted; - - soffset = radeon_sa_bo_hole_soffset(sa_manager); - eoffset = radeon_sa_bo_hole_eoffset(sa_manager); - wasted = (align - (soffset % align)) % align; - - if ((eoffset - soffset) >= (size + wasted)) { - soffset += wasted; - - sa_bo->manager = sa_manager; - sa_bo->soffset = soffset; - sa_bo->eoffset = soffset + size; - list_add(&sa_bo->olist, sa_manager->hole); - INIT_LIST_HEAD(&sa_bo->flist); - sa_manager->hole = &sa_bo->olist; - return true; - } - return false; -} - -/** - * radeon_sa_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 - * - * Check if either there is a fence we can wait for or - * enough free memory to satisfy the allocation directly - */ -static bool radeon_sa_event(struct radeon_sa_manager *sa_manager, - unsigned size, unsigned align) -{ - unsigned soffset, eoffset, wasted; - int i; - - for (i = 0; i < RADEON_NUM_RINGS; ++i) { - if (!list_empty(&sa_manager->flist[i])) { - return true; - } - } - - soffset = radeon_sa_bo_hole_soffset(sa_manager); - eoffset = radeon_sa_bo_hole_eoffset(sa_manager); - wasted = (align - (soffset % align)) % align; - - if ((eoffset - soffset) >= (size + wasted)) { - return true; - } - - return false; -} - -static bool radeon_sa_bo_next_hole(struct radeon_sa_manager *sa_manager, - struct radeon_fence **fences, - unsigned *tries) -{ - struct radeon_sa_bo *best_bo = NULL; - unsigned i, 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 = radeon_sa_bo_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_bo - * of the current last - */ - for (i = 0; i < RADEON_NUM_RINGS; ++i) { - struct radeon_sa_bo *sa_bo; - - fences[i] = NULL; - - if (list_empty(&sa_manager->flist[i])) { - continue; - } - - sa_bo = list_first_entry(&sa_manager->flist[i], - struct radeon_sa_bo, flist); - - if (!radeon_fence_signaled(sa_bo->fence)) { - fences[i] = sa_bo->fence; - continue; - } - - /* limit the number of tries each ring gets */ - if (tries[i] > 2) { - continue; - } - - tmp = sa_bo->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_bo = sa_bo; - } - } - - if (best_bo) { - ++tries[best_bo->fence->ring]; - sa_manager->hole = best_bo->olist.prev; - - /* we knew that this one is signaled, - so it's save to remote it */ - radeon_sa_bo_remove_locked(best_bo); - return true; - } - return false; -} - -int radeon_sa_bo_new(struct radeon_device *rdev, - struct radeon_sa_manager *sa_manager, - struct radeon_sa_bo **sa_bo, - unsigned size, unsigned align) -{ - struct radeon_fence *fences[RADEON_NUM_RINGS]; - unsigned tries[RADEON_NUM_RINGS]; - int i, r; - - BUG_ON(align > sa_manager->align); - BUG_ON(size > sa_manager->size); - - *sa_bo = kmalloc(sizeof(struct radeon_sa_bo), GFP_KERNEL); - if ((*sa_bo) == NULL) { - return -ENOMEM; - } - (*sa_bo)->manager = sa_manager; - (*sa_bo)->fence = NULL; - INIT_LIST_HEAD(&(*sa_bo)->olist); - INIT_LIST_HEAD(&(*sa_bo)->flist); - - spin_lock(&sa_manager->wq.lock); - do { - for (i = 0; i < RADEON_NUM_RINGS; ++i) - tries[i] = 0; - - do { - radeon_sa_bo_try_free(sa_manager); - - if (radeon_sa_bo_try_alloc(sa_manager, *sa_bo, - size, align)) { - spin_unlock(&sa_manager->wq.lock); - return 0; - } - - /* see if we can skip over some allocations */ - } while (radeon_sa_bo_next_hole(sa_manager, fences, tries)); - - for (i = 0; i < RADEON_NUM_RINGS; ++i) - radeon_fence_ref(fences[i]); - - spin_unlock(&sa_manager->wq.lock); - r = radeon_fence_wait_any(rdev, fences, false); - for (i = 0; i < RADEON_NUM_RINGS; ++i) - radeon_fence_unref(&fences[i]); - spin_lock(&sa_manager->wq.lock); - /* if we have nothing to wait for block */ - if (r == -ENOENT) { - r = wait_event_interruptible_locked( - sa_manager->wq, - radeon_sa_event(sa_manager, size, align) - ); - } - - } while (!r); - - spin_unlock(&sa_manager->wq.lock); - kfree(*sa_bo); - *sa_bo = NULL; - return r; -} - -void radeon_sa_bo_free(struct radeon_device *rdev, struct radeon_sa_bo **sa_bo, +void radeon_sa_bo_free(struct drm_suballoc **sa_bo, struct radeon_fence *fence) { - struct radeon_sa_manager *sa_manager; - if (sa_bo == NULL || *sa_bo == NULL) { return; } - sa_manager = (*sa_bo)->manager; - spin_lock(&sa_manager->wq.lock); - if (fence && !radeon_fence_signaled(fence)) { - (*sa_bo)->fence = radeon_fence_ref(fence); - list_add_tail(&(*sa_bo)->flist, - &sa_manager->flist[fence->ring]); - } else { - radeon_sa_bo_remove_locked(*sa_bo); - } - wake_up_all_locked(&sa_manager->wq); - spin_unlock(&sa_manager->wq.lock); + if (fence) + drm_suballoc_free(*sa_bo, &fence->base); + else + drm_suballoc_free(*sa_bo, NULL); + *sa_bo = NULL; } @@ -400,25 +153,8 @@ void radeon_sa_bo_free(struct radeon_device *rdev, struct radeon_sa_bo **sa_bo, void radeon_sa_bo_dump_debug_info(struct radeon_sa_manager *sa_manager, struct seq_file *m) { - struct radeon_sa_bo *i; + struct drm_printer p = drm_seq_file_printer(m); - spin_lock(&sa_manager->wq.lock); - list_for_each_entry(i, &sa_manager->olist, olist) { - uint64_t soffset = i->soffset + sa_manager->gpu_addr; - uint64_t eoffset = i->eoffset + sa_manager->gpu_addr; - if (&i->olist == sa_manager->hole) { - seq_printf(m, ">"); - } else { - seq_printf(m, " "); - } - seq_printf(m, "[0x%010llx 0x%010llx] size %8lld", - soffset, eoffset, eoffset - soffset); - if (i->fence) { - seq_printf(m, " protected by 0x%016llx on ring %d", - i->fence->seq, i->fence->ring); - } - seq_printf(m, "\n"); - } - spin_unlock(&sa_manager->wq.lock); + drm_suballoc_dump_debug_info(&sa_manager->base, &p, sa_manager->gpu_addr); } #endif diff --git a/drivers/gpu/drm/radeon/radeon_semaphore.c b/drivers/gpu/drm/radeon/radeon_semaphore.c index 221e59476f64..1f0a9a4ff5ae 100644 --- a/drivers/gpu/drm/radeon/radeon_semaphore.c +++ b/drivers/gpu/drm/radeon/radeon_semaphore.c @@ -40,7 +40,7 @@ int radeon_semaphore_create(struct radeon_device *rdev, if (*semaphore == NULL) { return -ENOMEM; } - r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, + r = radeon_sa_bo_new(&rdev->ring_tmp_bo, &(*semaphore)->sa_bo, 8, 8); if (r) { kfree(*semaphore); @@ -100,7 +100,7 @@ void radeon_semaphore_free(struct radeon_device *rdev, dev_err(rdev->dev, "semaphore %p has more waiters than signalers," " hardware lockup imminent!\n", *semaphore); } - radeon_sa_bo_free(rdev, &(*semaphore)->sa_bo, fence); + radeon_sa_bo_free(&(*semaphore)->sa_bo, fence); kfree(*semaphore); *semaphore = NULL; }