From patchwork Mon Nov 25 07:31:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Kasireddy X-Patchwork-Id: 13884483 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 F339CD3B7E9 for ; Mon, 25 Nov 2024 07:56:14 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1C1AE10E398; Mon, 25 Nov 2024 07:56:10 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="S+KSKGKC"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6D38D10E04C for ; Mon, 25 Nov 2024 07:56:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1732521366; x=1764057366; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=y46XkwqID+tK2XWUnRGe3LgLseR9YMHmf6CYQ0qbaEw=; b=S+KSKGKCJIXffzWu4UG1leXS+aVgiauXBPw0EQzswqhS+9LhYoG2avuQ fz8XCHBLGsNO8dS5yQ9wnZxVwMi7G2B5A05AIxEn3swejQAllx89aQAJL 2b5cQYQyB5jRaR74FL4PGub+bphPh/M5Ne72n+YEdLI5mEGKzm1Ywpnxs q8C3nAdHZJ9/ypxL7qTr5uSz/+Bx3dBXU2UJut+42AUFfFVhC6BeDkhxU CbxPnR4a/kk9rdyrm32C4SrTLSqeIt3RV+xM4qXTajZ0skr7I5a70wO/X J7Ry+L+B/tFWyqu5NRKU/HN5wTYovk8bhKWesBbzN7yOHWbQ6jyYox/gf g==; X-CSE-ConnectionGUID: UtsHZwLBQEaJ8a1qyEuCaA== X-CSE-MsgGUID: xCzxaPWHQNK8FDTanCk3XQ== X-IronPort-AV: E=McAfee;i="6700,10204,11266"; a="43270778" X-IronPort-AV: E=Sophos;i="6.12,182,1728975600"; d="scan'208";a="43270778" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Nov 2024 23:56:05 -0800 X-CSE-ConnectionGUID: HNdjlZhHT3q6CDUIfwHtnA== X-CSE-MsgGUID: X47K2W55R7ijToLN18Isyw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="96244605" Received: from vkasired-desk2.fm.intel.com ([10.105.128.132]) by ORVIESA003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Nov 2024 23:56:05 -0800 From: Vivek Kasireddy To: dri-devel@lists.freedesktop.org Cc: Vivek Kasireddy , Gerd Hoffmann , Dmitry Osipenko , Rob Clark , Gurchetan Singh , Chia-I Wu Subject: [PATCH v4 1/5] drm/virtio: Implement VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING cmd Date: Sun, 24 Nov 2024 23:31:02 -0800 Message-ID: <20241125073313.3361612-2-vivek.kasireddy@intel.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20241125073313.3361612-1-vivek.kasireddy@intel.com> References: <20241125073313.3361612-1-vivek.kasireddy@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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This cmd is useful to let the VMM (i.e, Qemu) know that the backing store associated with a resource is no longer valid, so that the VMM can perform any cleanup or unmap operations. The fence related changes and virtio_gpu_object_detach()/ virtio_gpu_detach_object_fenced() routines are extracted from a patch by Dmitry Osipenko . Cc: Gerd Hoffmann Cc: Dmitry Osipenko Cc: Rob Clark Cc: Gurchetan Singh Cc: Chia-I Wu Signed-off-by: Vivek Kasireddy --- drivers/gpu/drm/virtio/virtgpu_drv.h | 5 +++++ drivers/gpu/drm/virtio/virtgpu_object.c | 23 +++++++++++++++++++++++ drivers/gpu/drm/virtio/virtgpu_vq.c | 25 +++++++++++++++++++++++++ 3 files changed, 53 insertions(+) diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h index 96eb576bc1b8..6584f7984b1e 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -92,6 +92,7 @@ struct virtio_gpu_object { uint32_t hw_res_handle; bool dumb; bool created; + bool detached; bool host3d_blob, guest_blob; uint32_t blob_mem, blob_flags; @@ -353,6 +354,10 @@ void virtio_gpu_object_attach(struct virtio_gpu_device *vgdev, struct virtio_gpu_object *obj, struct virtio_gpu_mem_entry *ents, unsigned int nents); +void virtio_gpu_object_detach(struct virtio_gpu_device *vgdev, + struct virtio_gpu_object *obj, + struct virtio_gpu_fence *fence); +int virtio_gpu_detach_object_fenced(struct virtio_gpu_object *bo); void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev, struct virtio_gpu_output *output); int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev); diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c index c7e74cf13022..53bb02c8a135 100644 --- a/drivers/gpu/drm/virtio/virtgpu_object.c +++ b/drivers/gpu/drm/virtio/virtgpu_object.c @@ -97,6 +97,29 @@ static void virtio_gpu_free_object(struct drm_gem_object *obj) virtio_gpu_cleanup_object(bo); } +int virtio_gpu_detach_object_fenced(struct virtio_gpu_object *bo) +{ + struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private; + struct virtio_gpu_fence *fence; + + if (bo->detached) + return 0; + + fence = virtio_gpu_fence_alloc(vgdev, vgdev->fence_drv.context, 0); + if (!fence) + return -ENOMEM; + + virtio_gpu_object_detach(vgdev, bo, fence); + virtio_gpu_notify(vgdev); + + dma_fence_wait(&fence->f, false); + dma_fence_put(&fence->f); + + bo->detached = true; + + return 0; +} + static const struct drm_gem_object_funcs virtio_gpu_shmem_funcs = { .free = virtio_gpu_free_object, .open = virtio_gpu_gem_object_open, diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c index 0d3d0d09f39b..b8b296b912a1 100644 --- a/drivers/gpu/drm/virtio/virtgpu_vq.c +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c @@ -645,6 +645,23 @@ virtio_gpu_cmd_resource_attach_backing(struct virtio_gpu_device *vgdev, virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence); } +static void +virtio_gpu_cmd_resource_detach_backing(struct virtio_gpu_device *vgdev, + uint32_t resource_id, + struct virtio_gpu_fence *fence) +{ + struct virtio_gpu_resource_detach_backing *cmd_p; + struct virtio_gpu_vbuffer *vbuf; + + cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p)); + memset(cmd_p, 0, sizeof(*cmd_p)); + + cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING); + cmd_p->resource_id = cpu_to_le32(resource_id); + + virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence); +} + static void virtio_gpu_cmd_get_display_info_cb(struct virtio_gpu_device *vgdev, struct virtio_gpu_vbuffer *vbuf) { @@ -1107,6 +1124,14 @@ void virtio_gpu_object_attach(struct virtio_gpu_device *vgdev, ents, nents, NULL); } +void virtio_gpu_object_detach(struct virtio_gpu_device *vgdev, + struct virtio_gpu_object *obj, + struct virtio_gpu_fence *fence) +{ + virtio_gpu_cmd_resource_detach_backing(vgdev, obj->hw_res_handle, + fence); +} + void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev, struct virtio_gpu_output *output) {