From patchwork Fri Dec 20 13:37:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Ma=C3=ADra_Canal?= X-Patchwork-Id: 13916777 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 F3A8CE77188 for ; Fri, 20 Dec 2024 13:42:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6E7D610E3A1; Fri, 20 Dec 2024 13:42:40 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=igalia.com header.i=@igalia.com header.b="E5qQFwWC"; dkim-atps=neutral Received: from fanzine2.igalia.com (fanzine.igalia.com [178.60.130.6]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7A02910E37F for ; Fri, 20 Dec 2024 13:42:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=YI5e0/uVV+en3+KIcABpO5VSNFcTV/T2uLqLkWlxZZw=; b=E5qQFwWCvvcWnxrlQDs5d9T/v7 FJi0a32jbhqVSpvIse3Kjir1U8bcNmUe5kfv0hwWaO2uj0QobLUR3q3LEyWfF9O/WIPolr1Rzax5t 7pXoi3S1iYBMZI41M4iJmzt8E8c66uv0frqk6Sx9ONLImU1jc1IOSaTkxI6sd+7/S/bOr3jYH4bNk QKpLk2biriWdVTFP0W1CnLnocNyrqzH1zpBOsJTumDW0790GORINEAdGvh/4tm53Pbjhtuq8KTSH5 t7DuRwKTl8xPoubmHUyOLmJNMJqHKuETBe2kJ4aZ1w7HIWuYBumoQqPwPyKQ97dNo9oZKUseSMdSf Z+2XdbAQ==; Received: from [187.36.213.55] (helo=morissey..) by fanzine2.igalia.com with esmtpsa (Cipher TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1tOdGu-005n05-1j; Fri, 20 Dec 2024 14:42:28 +0100 From: =?utf-8?q?Ma=C3=ADra_Canal?= To: Melissa Wen , Maxime Ripard , Dave Stevenson , =?utf-8?q?Christian_K?= =?utf-8?q?=C3=B6nig?= , Tvrtko Ursulin , Simona Vetter Cc: dri-devel@lists.freedesktop.org, kernel-dev@igalia.com, =?utf-8?q?Ma?= =?utf-8?q?=C3=ADra_Canal?= Subject: [PATCH v3 1/3] drm/vc4: Use DRM Execution Contexts Date: Fri, 20 Dec 2024 10:37:07 -0300 Message-ID: <20241220134204.634577-2-mcanal@igalia.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241220134204.634577-1-mcanal@igalia.com> References: <20241220134204.634577-1-mcanal@igalia.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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" VC4 has internal copies of `drm_gem_lock_reservations()` and `drm_gem_unlock_reservations()` within the driver. Ideally, these hard-coded functions should be replaced with the generic functions provided by DRM common code. However, instead of using the DRM GEM functions to (un)lock reservations, transition to the new DRM Execution Contexts API. Signed-off-by: Maíra Canal Acked-by: Christian König --- drivers/gpu/drm/vc4/Kconfig | 1 + drivers/gpu/drm/vc4/vc4_gem.c | 99 ++++++++--------------------------- 2 files changed, 22 insertions(+), 78 deletions(-) diff --git a/drivers/gpu/drm/vc4/Kconfig b/drivers/gpu/drm/vc4/Kconfig index c5f30b317698..0627e826fda4 100644 --- a/drivers/gpu/drm/vc4/Kconfig +++ b/drivers/gpu/drm/vc4/Kconfig @@ -13,6 +13,7 @@ config DRM_VC4 select DRM_DISPLAY_HDMI_HELPER select DRM_DISPLAY_HDMI_STATE_HELPER select DRM_DISPLAY_HELPER + select DRM_EXEC select DRM_KMS_HELPER select DRM_GEM_DMA_HELPER select DRM_PANEL_BRIDGE diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c index 22bccd69eb62..1021f45cb53c 100644 --- a/drivers/gpu/drm/vc4/vc4_gem.c +++ b/drivers/gpu/drm/vc4/vc4_gem.c @@ -29,6 +29,7 @@ #include #include +#include #include #include "uapi/drm/vc4_drm.h" @@ -578,19 +579,6 @@ vc4_update_bo_seqnos(struct vc4_exec_info *exec, uint64_t seqno) } } -static void -vc4_unlock_bo_reservations(struct drm_device *dev, - struct vc4_exec_info *exec, - struct ww_acquire_ctx *acquire_ctx) -{ - int i; - - for (i = 0; i < exec->bo_count; i++) - dma_resv_unlock(exec->bo[i]->resv); - - ww_acquire_fini(acquire_ctx); -} - /* Takes the reservation lock on all the BOs being referenced, so that * at queue submit time we can update the reservations. * @@ -599,70 +587,23 @@ vc4_unlock_bo_reservations(struct drm_device *dev, * to vc4, so we don't attach dma-buf fences to them. */ static int -vc4_lock_bo_reservations(struct drm_device *dev, - struct vc4_exec_info *exec, - struct ww_acquire_ctx *acquire_ctx) +vc4_lock_bo_reservations(struct vc4_exec_info *exec, + struct drm_exec *exec_ctx) { - int contended_lock = -1; - int i, ret; - struct drm_gem_object *bo; - - ww_acquire_init(acquire_ctx, &reservation_ww_class); - -retry: - if (contended_lock != -1) { - bo = exec->bo[contended_lock]; - ret = dma_resv_lock_slow_interruptible(bo->resv, acquire_ctx); - if (ret) { - ww_acquire_done(acquire_ctx); - return ret; - } - } - - for (i = 0; i < exec->bo_count; i++) { - if (i == contended_lock) - continue; - - bo = exec->bo[i]; - - ret = dma_resv_lock_interruptible(bo->resv, acquire_ctx); - if (ret) { - int j; - - for (j = 0; j < i; j++) { - bo = exec->bo[j]; - dma_resv_unlock(bo->resv); - } - - if (contended_lock != -1 && contended_lock >= i) { - bo = exec->bo[contended_lock]; - - dma_resv_unlock(bo->resv); - } - - if (ret == -EDEADLK) { - contended_lock = i; - goto retry; - } - - ww_acquire_done(acquire_ctx); - return ret; - } - } - - ww_acquire_done(acquire_ctx); + int ret; /* Reserve space for our shared (read-only) fence references, * before we commit the CL to the hardware. */ - for (i = 0; i < exec->bo_count; i++) { - bo = exec->bo[i]; + drm_exec_init(exec_ctx, DRM_EXEC_INTERRUPTIBLE_WAIT, exec->bo_count); + drm_exec_until_all_locked(exec_ctx) { + ret = drm_exec_prepare_array(exec_ctx, exec->bo, + exec->bo_count, 1); + } - ret = dma_resv_reserve_fences(bo->resv, 1); - if (ret) { - vc4_unlock_bo_reservations(dev, exec, acquire_ctx); - return ret; - } + if (ret) { + drm_exec_fini(exec_ctx); + return ret; } return 0; @@ -679,7 +620,7 @@ vc4_lock_bo_reservations(struct drm_device *dev, */ static int vc4_queue_submit(struct drm_device *dev, struct vc4_exec_info *exec, - struct ww_acquire_ctx *acquire_ctx, + struct drm_exec *exec_ctx, struct drm_syncobj *out_sync) { struct vc4_dev *vc4 = to_vc4_dev(dev); @@ -708,7 +649,7 @@ vc4_queue_submit(struct drm_device *dev, struct vc4_exec_info *exec, vc4_update_bo_seqnos(exec, seqno); - vc4_unlock_bo_reservations(dev, exec, acquire_ctx); + drm_exec_fini(exec_ctx); list_add_tail(&exec->head, &vc4->bin_job_list); @@ -1123,7 +1064,7 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data, struct drm_vc4_submit_cl *args = data; struct drm_syncobj *out_sync = NULL; struct vc4_exec_info *exec; - struct ww_acquire_ctx acquire_ctx; + struct drm_exec exec_ctx; struct dma_fence *in_fence; int ret = 0; @@ -1216,7 +1157,7 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data, if (ret) goto fail; - ret = vc4_lock_bo_reservations(dev, exec, &acquire_ctx); + ret = vc4_lock_bo_reservations(exec, &exec_ctx); if (ret) goto fail; @@ -1224,7 +1165,7 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data, out_sync = drm_syncobj_find(file_priv, args->out_sync); if (!out_sync) { ret = -EINVAL; - goto fail; + goto fail_unreserve; } /* We replace the fence in out_sync in vc4_queue_submit since @@ -1239,7 +1180,7 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data, */ exec->args = NULL; - ret = vc4_queue_submit(dev, exec, &acquire_ctx, out_sync); + ret = vc4_queue_submit(dev, exec, &exec_ctx, out_sync); /* The syncobj isn't part of the exec data and we need to free our * reference even if job submission failed. @@ -1248,13 +1189,15 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data, drm_syncobj_put(out_sync); if (ret) - goto fail; + goto fail_unreserve; /* Return the seqno for our job. */ args->seqno = vc4->emit_seqno; return 0; +fail_unreserve: + drm_exec_fini(&exec_ctx); fail: vc4_complete_exec(&vc4->base, exec);