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(109-252-120-116.nat.spd-mgts.ru [109.252.120.116]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: dmitry.osipenko) by madras.collabora.co.uk (Postfix) with ESMTPSA id 3DC686603104; Thu, 23 Mar 2023 23:09:06 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1679612947; bh=wU5nu7moCLh/VSnmBBTuq/yUppvS8/tWoNKb75RdOdE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XbmFhwu8sM1QHC26+YnLfmrWIZIUzKT7sXKT+xv3zjDzkjfPYvDNp8mRScdEpuDV6 8El0OlOYa5wTIjwsEM+xv0DjiTwaOHCN88oty+tjqBZvWR+17Dqe2OmY9AUajRPG5R Lp+KAPmpFVQ8qsIY6AylW40kewf9xoN4dSUVR7Mihes8VdviDeIDm6qjeBzj84WgK5 juJhP83wVTD+W36TZg60Q02GUWpEEBNIjONG0tSCj8dr4fdePUb4GBzEANDnaiVFCP zEORr2NBvZs5GzaZZETvg0REymHPvUfk7quZ2XdASw/Ai++kXu5OT0BZ0tGWx/zOnu VU86NZaS8adag== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Rob Clark , =?UTF-8?q?Marek=20Ol=C5=A1=C3=A1k?= , Pierre-Eric Pelloux-Prayer , Emil Velikov Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, kernel@collabora.com, virtualization@lists.linux-foundation.org Subject: [PATCH v4 1/2] drm/virtio: Refactor job submission code path Date: Fri, 24 Mar 2023 02:07:54 +0300 Message-Id: <20230323230755.1094832-2-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230323230755.1094832-1-dmitry.osipenko@collabora.com> References: <20230323230755.1094832-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-0.2 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Move virtio_gpu_execbuffer_ioctl() into separate virtgpu_submit.c file and refactor the code along the way to ease addition of new features to the ioctl. Reviewed-by: Rob Clark Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/virtio/Makefile | 2 +- drivers/gpu/drm/virtio/virtgpu_drv.h | 4 + drivers/gpu/drm/virtio/virtgpu_ioctl.c | 182 -------------- drivers/gpu/drm/virtio/virtgpu_submit.c | 302 ++++++++++++++++++++++++ 4 files changed, 307 insertions(+), 183 deletions(-) create mode 100644 drivers/gpu/drm/virtio/virtgpu_submit.c diff --git a/drivers/gpu/drm/virtio/Makefile b/drivers/gpu/drm/virtio/Makefile index b99fa4a73b68..d2e1788a8227 100644 --- a/drivers/gpu/drm/virtio/Makefile +++ b/drivers/gpu/drm/virtio/Makefile @@ -6,6 +6,6 @@ virtio-gpu-y := virtgpu_drv.o virtgpu_kms.o virtgpu_gem.o virtgpu_vram.o \ virtgpu_display.o virtgpu_vq.o \ virtgpu_fence.o virtgpu_object.o virtgpu_debugfs.o virtgpu_plane.o \ - virtgpu_ioctl.o virtgpu_prime.o virtgpu_trace_points.o + virtgpu_ioctl.o virtgpu_prime.o virtgpu_trace_points.o virtgpu_submit.o obj-$(CONFIG_DRM_VIRTIO_GPU) += virtio-gpu.o diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h index af6ffb696086..4126c384286b 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -486,4 +486,8 @@ void virtio_gpu_vram_unmap_dma_buf(struct device *dev, struct sg_table *sgt, enum dma_data_direction dir); +/* virtgpu_submit.c */ +int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data, + struct drm_file *file); + #endif diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c index da45215a933d..b24b11f25197 100644 --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c @@ -38,36 +38,6 @@ VIRTGPU_BLOB_FLAG_USE_SHAREABLE | \ VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE) -static int virtio_gpu_fence_event_create(struct drm_device *dev, - struct drm_file *file, - struct virtio_gpu_fence *fence, - uint32_t ring_idx) -{ - struct virtio_gpu_fpriv *vfpriv = file->driver_priv; - struct virtio_gpu_fence_event *e = NULL; - int ret; - - if (!(vfpriv->ring_idx_mask & BIT_ULL(ring_idx))) - return 0; - - e = kzalloc(sizeof(*e), GFP_KERNEL); - if (!e) - return -ENOMEM; - - e->event.type = VIRTGPU_EVENT_FENCE_SIGNALED; - e->event.length = sizeof(e->event); - - ret = drm_event_reserve_init(dev, file, &e->base, &e->event); - if (ret) - goto free; - - fence->e = e; - return 0; -free: - kfree(e); - return ret; -} - /* Must be called with &virtio_gpu_fpriv.struct_mutex held. */ static void virtio_gpu_create_context_locked(struct virtio_gpu_device *vgdev, struct virtio_gpu_fpriv *vfpriv) @@ -108,158 +78,6 @@ static int virtio_gpu_map_ioctl(struct drm_device *dev, void *data, &virtio_gpu_map->offset); } -/* - * Usage of execbuffer: - * Relocations need to take into account the full VIRTIO_GPUDrawable size. - * However, the command as passed from user space must *not* contain the initial - * VIRTIO_GPUReleaseInfo struct (first XXX bytes) - */ -static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data, - struct drm_file *file) -{ - struct drm_virtgpu_execbuffer *exbuf = data; - struct virtio_gpu_device *vgdev = dev->dev_private; - struct virtio_gpu_fpriv *vfpriv = file->driver_priv; - struct virtio_gpu_fence *out_fence; - int ret; - uint32_t *bo_handles = NULL; - void __user *user_bo_handles = NULL; - struct virtio_gpu_object_array *buflist = NULL; - struct sync_file *sync_file; - int out_fence_fd = -1; - void *buf; - uint64_t fence_ctx; - uint32_t ring_idx; - - fence_ctx = vgdev->fence_drv.context; - ring_idx = 0; - - if (vgdev->has_virgl_3d == false) - return -ENOSYS; - - if ((exbuf->flags & ~VIRTGPU_EXECBUF_FLAGS)) - return -EINVAL; - - if ((exbuf->flags & VIRTGPU_EXECBUF_RING_IDX)) { - if (exbuf->ring_idx >= vfpriv->num_rings) - return -EINVAL; - - if (!vfpriv->base_fence_ctx) - return -EINVAL; - - fence_ctx = vfpriv->base_fence_ctx; - ring_idx = exbuf->ring_idx; - } - - virtio_gpu_create_context(dev, file); - if (exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_IN) { - struct dma_fence *in_fence; - - in_fence = sync_file_get_fence(exbuf->fence_fd); - - if (!in_fence) - return -EINVAL; - - /* - * Wait if the fence is from a foreign context, or if the fence - * array contains any fence from a foreign context. - */ - ret = 0; - if (!dma_fence_match_context(in_fence, fence_ctx + ring_idx)) - ret = dma_fence_wait(in_fence, true); - - dma_fence_put(in_fence); - if (ret) - return ret; - } - - if (exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_OUT) { - out_fence_fd = get_unused_fd_flags(O_CLOEXEC); - if (out_fence_fd < 0) - return out_fence_fd; - } - - if (exbuf->num_bo_handles) { - bo_handles = kvmalloc_array(exbuf->num_bo_handles, - sizeof(uint32_t), GFP_KERNEL); - if (!bo_handles) { - ret = -ENOMEM; - goto out_unused_fd; - } - - user_bo_handles = u64_to_user_ptr(exbuf->bo_handles); - if (copy_from_user(bo_handles, user_bo_handles, - exbuf->num_bo_handles * sizeof(uint32_t))) { - ret = -EFAULT; - goto out_unused_fd; - } - - buflist = virtio_gpu_array_from_handles(file, bo_handles, - exbuf->num_bo_handles); - if (!buflist) { - ret = -ENOENT; - goto out_unused_fd; - } - kvfree(bo_handles); - bo_handles = NULL; - } - - buf = vmemdup_user(u64_to_user_ptr(exbuf->command), exbuf->size); - if (IS_ERR(buf)) { - ret = PTR_ERR(buf); - goto out_unused_fd; - } - - if (buflist) { - ret = virtio_gpu_array_lock_resv(buflist); - if (ret) - goto out_memdup; - } - - out_fence = virtio_gpu_fence_alloc(vgdev, fence_ctx, ring_idx); - if(!out_fence) { - ret = -ENOMEM; - goto out_unresv; - } - - ret = virtio_gpu_fence_event_create(dev, file, out_fence, ring_idx); - if (ret) - goto out_unresv; - - if (out_fence_fd >= 0) { - sync_file = sync_file_create(&out_fence->f); - if (!sync_file) { - dma_fence_put(&out_fence->f); - ret = -ENOMEM; - goto out_unresv; - } - - exbuf->fence_fd = out_fence_fd; - fd_install(out_fence_fd, sync_file->file); - } - - virtio_gpu_cmd_submit(vgdev, buf, exbuf->size, - vfpriv->ctx_id, buflist, out_fence); - dma_fence_put(&out_fence->f); - virtio_gpu_notify(vgdev); - return 0; - -out_unresv: - if (buflist) - virtio_gpu_array_unlock_resv(buflist); -out_memdup: - kvfree(buf); -out_unused_fd: - kvfree(bo_handles); - if (buflist) - virtio_gpu_array_put_free(buflist); - - if (out_fence_fd >= 0) - put_unused_fd(out_fence_fd); - - return ret; -} - static int virtio_gpu_getparam_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { diff --git a/drivers/gpu/drm/virtio/virtgpu_submit.c b/drivers/gpu/drm/virtio/virtgpu_submit.c new file mode 100644 index 000000000000..42c79869f192 --- /dev/null +++ b/drivers/gpu/drm/virtio/virtgpu_submit.c @@ -0,0 +1,302 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright (C) 2015 Red Hat, Inc. + * All Rights Reserved. + * + * Authors: + * Dave Airlie + * Alon Levy + */ + +#include +#include +#include +#include + +#include +#include + +#include "virtgpu_drv.h" + +struct virtio_gpu_submit { + struct virtio_gpu_object_array *buflist; + struct drm_virtgpu_execbuffer *exbuf; + struct virtio_gpu_fence *out_fence; + struct virtio_gpu_fpriv *vfpriv; + struct virtio_gpu_device *vgdev; + struct drm_file *file; + uint64_t fence_ctx; + uint32_t ring_idx; + int out_fence_fd; + void *buf; +}; + +static int virtio_gpu_do_fence_wait(struct virtio_gpu_submit *submit, + struct dma_fence *in_fence) +{ + uint32_t context = submit->fence_ctx + submit->ring_idx; + + if (dma_fence_match_context(in_fence, context)) + return 0; + + return dma_fence_wait(in_fence, true); +} + +static int virtio_gpu_dma_fence_wait(struct virtio_gpu_submit *submit, + struct dma_fence *fence) +{ + struct dma_fence_unwrap itr; + struct dma_fence *f; + int err; + + dma_fence_unwrap_for_each(f, &itr, fence) { + err = virtio_gpu_do_fence_wait(submit, f); + if (err) + return err; + } + + return 0; +} + +static int virtio_gpu_fence_event_create(struct drm_device *dev, + struct drm_file *file, + struct virtio_gpu_fence *fence, + uint32_t ring_idx) +{ + struct virtio_gpu_fpriv *vfpriv = file->driver_priv; + struct virtio_gpu_fence_event *e = NULL; + int ret; + + if (!(vfpriv->ring_idx_mask & BIT_ULL(ring_idx))) + return 0; + + e = kzalloc(sizeof(*e), GFP_KERNEL); + if (!e) + return -ENOMEM; + + e->event.type = VIRTGPU_EVENT_FENCE_SIGNALED; + e->event.length = sizeof(e->event); + + ret = drm_event_reserve_init(dev, file, &e->base, &e->event); + if (ret) { + kfree(e); + return ret; + } + + fence->e = e; + + return 0; +} + +static int virtio_gpu_init_submit_buflist(struct virtio_gpu_submit *submit) +{ + struct drm_virtgpu_execbuffer *exbuf = submit->exbuf; + uint32_t *bo_handles; + + if (!exbuf->num_bo_handles) + return 0; + + bo_handles = kvmalloc_array(exbuf->num_bo_handles, sizeof(*bo_handles), + GFP_KERNEL); + if (!bo_handles) + return -ENOMEM; + + if (copy_from_user(bo_handles, u64_to_user_ptr(exbuf->bo_handles), + exbuf->num_bo_handles * sizeof(*bo_handles))) { + kvfree(bo_handles); + return -EFAULT; + } + + submit->buflist = virtio_gpu_array_from_handles(submit->file, bo_handles, + exbuf->num_bo_handles); + if (!submit->buflist) { + kvfree(bo_handles); + return -ENOENT; + } + + kvfree(bo_handles); + + return 0; +} + +static void virtio_gpu_cleanup_submit(struct virtio_gpu_submit *submit) +{ + if (!IS_ERR(submit->buf)) + kvfree(submit->buf); + + if (submit->buflist) + virtio_gpu_array_put_free(submit->buflist); + + if (submit->out_fence_fd >= 0) + put_unused_fd(submit->out_fence_fd); + + if (submit->out_fence) + dma_fence_put(&submit->out_fence->f); +} + +static void virtio_gpu_submit(struct virtio_gpu_submit *submit) +{ + virtio_gpu_cmd_submit(submit->vgdev, submit->buf, submit->exbuf->size, + submit->vfpriv->ctx_id, submit->buflist, + submit->out_fence); + virtio_gpu_notify(submit->vgdev); +} + +static void virtio_gpu_complete_submit(struct virtio_gpu_submit *submit) +{ + submit->buf = NULL; + submit->buflist = NULL; + submit->out_fence = NULL; + submit->out_fence_fd = -1; +} + +static int virtio_gpu_init_submit(struct virtio_gpu_submit *submit, + struct drm_virtgpu_execbuffer *exbuf, + struct drm_device *dev, + struct drm_file *file, + uint64_t fence_ctx, uint32_t ring_idx) +{ + struct virtio_gpu_fpriv *vfpriv = file->driver_priv; + struct virtio_gpu_device *vgdev = dev->dev_private; + struct virtio_gpu_fence *out_fence; + int err; + + memset(submit, 0, sizeof(*submit)); + + out_fence = virtio_gpu_fence_alloc(vgdev, fence_ctx, ring_idx); + if (!out_fence) + return -ENOMEM; + + err = virtio_gpu_fence_event_create(dev, file, out_fence, ring_idx); + if (err) { + dma_fence_put(&out_fence->f); + return err; + } + + submit->out_fence = out_fence; + submit->fence_ctx = fence_ctx; + submit->ring_idx = ring_idx; + submit->out_fence_fd = -1; + submit->vfpriv = vfpriv; + submit->vgdev = vgdev; + submit->exbuf = exbuf; + submit->file = file; + + err = virtio_gpu_init_submit_buflist(submit); + if (err) + return err; + + submit->buf = vmemdup_user(u64_to_user_ptr(exbuf->command), exbuf->size); + if (IS_ERR(submit->buf)) + return PTR_ERR(submit->buf); + + if (exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_OUT) { + err = get_unused_fd_flags(O_CLOEXEC); + if (err < 0) + return err; + + submit->out_fence_fd = err; + } + + return 0; +} + +static int virtio_gpu_wait_in_fence(struct virtio_gpu_submit *submit) +{ + int ret = 0; + + if (submit->exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_IN) { + struct dma_fence *in_fence = + sync_file_get_fence(submit->exbuf->fence_fd); + if (!in_fence) + return -EINVAL; + + /* + * Wait if the fence is from a foreign context, or if the fence + * array contains any fence from a foreign context. + */ + ret = virtio_gpu_dma_fence_wait(submit, in_fence); + + dma_fence_put(in_fence); + } + + return ret; +} + +static int virtio_gpu_install_out_fence_fd(struct virtio_gpu_submit *submit) +{ + if (submit->out_fence_fd >= 0) { + struct sync_file *sync_file = + sync_file_create(&submit->out_fence->f); + if (!sync_file) + return -ENOMEM; + + submit->exbuf->fence_fd = submit->out_fence_fd; + fd_install(submit->out_fence_fd, sync_file->file); + } + + return 0; +} + +static int virtio_gpu_lock_buflist(struct virtio_gpu_submit *submit) +{ + if (submit->buflist) + return virtio_gpu_array_lock_resv(submit->buflist); + + return 0; +} + +int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct virtio_gpu_device *vgdev = dev->dev_private; + struct virtio_gpu_fpriv *vfpriv = file->driver_priv; + uint64_t fence_ctx = vgdev->fence_drv.context; + struct drm_virtgpu_execbuffer *exbuf = data; + struct virtio_gpu_submit submit; + uint32_t ring_idx = 0; + int ret = -EINVAL; + + if (vgdev->has_virgl_3d == false) + return -ENOSYS; + + if ((exbuf->flags & ~VIRTGPU_EXECBUF_FLAGS)) + return ret; + + if ((exbuf->flags & VIRTGPU_EXECBUF_RING_IDX)) { + if (exbuf->ring_idx >= vfpriv->num_rings) + return ret; + + if (!vfpriv->base_fence_ctx) + return ret; + + fence_ctx = vfpriv->base_fence_ctx; + ring_idx = exbuf->ring_idx; + } + + virtio_gpu_create_context(dev, file); + + ret = virtio_gpu_init_submit(&submit, exbuf, dev, file, + fence_ctx, ring_idx); + if (ret) + goto cleanup; + + ret = virtio_gpu_wait_in_fence(&submit); + if (ret) + goto cleanup; + + ret = virtio_gpu_install_out_fence_fd(&submit); + if (ret) + goto cleanup; + + ret = virtio_gpu_lock_buflist(&submit); + if (ret) + goto cleanup; + + virtio_gpu_submit(&submit); + virtio_gpu_complete_submit(&submit); +cleanup: + virtio_gpu_cleanup_submit(&submit); + + return ret; +} -- 2.39.2