From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8EC49C433ED for ; Fri, 16 Apr 2021 13:31:58 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 1DB55610EA for ; Fri, 16 Apr 2021 13:31:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1DB55610EA Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=amd-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CADCA6EA37; Fri, 16 Apr 2021 13:31:51 +0000 (UTC) Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id E2AC56E50C; Fri, 16 Apr 2021 13:31:50 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 78D09AF4F; Fri, 16 Apr 2021 13:31:49 +0000 (UTC) From: Thomas Zimmermann To: alexander.deucher@amd.com, christian.koenig@amd.com, airlied@linux.ie, daniel@ffwll.ch, bskeggs@redhat.com, ray.huang@amd.com, linux-graphics-maintainer@vmware.com, sroland@vmware.com, zackr@vmware.com, shashank.sharma@amd.com, sam@ravnborg.org, emil.velikov@collabora.com, Felix.Kuehling@amd.com, nirmoy.das@amd.com Subject: [PATCH v3 2/7] drm/amdgpu: Implement mmap as GEM object function Date: Fri, 16 Apr 2021 15:31:41 +0200 Message-Id: <20210416133146.24825-3-tzimmermann@suse.de> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210416133146.24825-1-tzimmermann@suse.de> References: <20210416133146.24825-1-tzimmermann@suse.de> MIME-Version: 1.0 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: nouveau@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, Thomas Zimmermann Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" Moving the driver-specific mmap code into a GEM object function allows for using DRM helpers for various mmap callbacks. This change resolves several inconsistencies between regular mmap and prime-based mmap. The vm_ops field in vma is now set for all mmap'ed areas. Previously it way only set for regular mmap calls, prime-based mmap used TTM's default vm_ops. The function amdgpu_verify_access() is no longer being called and therefore removed by this patch. As a side effect, amdgpu_ttm_vm_ops and amdgpu_ttm_fault() are now implemented in amdgpu's GEM code. v3: * rename mmap function to amdgpu_gem_object_mmap() (Christian) * remove unnecessary checks from mmap (Christian) v2: * rename amdgpu_ttm_vm_ops and amdgpu_ttm_fault() to amdgpu_gem_vm_ops and amdgpu_gem_fault() (Christian) * the check for kfd_bo has meanwhile been removed Signed-off-by: Thomas Zimmermann cleanup mmap rename gem_object_mmap --- drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 46 --------------- drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h | 2 - drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 +- drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 44 ++++++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 64 --------------------- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 1 - 6 files changed, 46 insertions(+), 115 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c index e0c4f7c7f1b9..19c5ab08d9ec 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c @@ -42,52 +42,6 @@ #include #include -/** - * amdgpu_gem_prime_mmap - &drm_driver.gem_prime_mmap implementation - * @obj: GEM BO - * @vma: Virtual memory area - * - * Sets up a userspace mapping of the BO's memory in the given - * virtual memory area. - * - * Returns: - * 0 on success or a negative error code on failure. - */ -int amdgpu_gem_prime_mmap(struct drm_gem_object *obj, - struct vm_area_struct *vma) -{ - struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); - struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); - unsigned asize = amdgpu_bo_size(bo); - int ret; - - if (!vma->vm_file) - return -ENODEV; - - if (adev == NULL) - return -ENODEV; - - /* Check for valid size. */ - if (asize < vma->vm_end - vma->vm_start) - return -EINVAL; - - if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm) || - (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)) { - return -EPERM; - } - vma->vm_pgoff += amdgpu_bo_mmap_offset(bo) >> PAGE_SHIFT; - - /* prime mmap does not need to check access, so allow here */ - ret = drm_vma_node_allow(&obj->vma_node, vma->vm_file->private_data); - if (ret) - return ret; - - ret = ttm_bo_mmap(vma->vm_file, vma, &adev->mman.bdev); - drm_vma_node_revoke(&obj->vma_node, vma->vm_file->private_data); - - return ret; -} - static int __dma_resv_make_exclusive(struct dma_resv *obj) { diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h index 39b5b9616fd8..3e93b9b407a9 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h @@ -31,8 +31,6 @@ struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev, struct dma_buf *dma_buf); bool amdgpu_dmabuf_is_xgmi_accessible(struct amdgpu_device *adev, struct amdgpu_bo *bo); -int amdgpu_gem_prime_mmap(struct drm_gem_object *obj, - struct vm_area_struct *vma); extern const struct dma_buf_ops amdgpu_dmabuf_ops; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 80130c1c0c68..69d2485ec665 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1686,7 +1686,7 @@ static const struct file_operations amdgpu_driver_kms_fops = { .flush = amdgpu_flush, .release = drm_release, .unlocked_ioctl = amdgpu_drm_ioctl, - .mmap = amdgpu_mmap, + .mmap = drm_gem_mmap, .poll = drm_poll, .read = drm_read, #ifdef CONFIG_COMPAT @@ -1749,7 +1749,7 @@ static const struct drm_driver amdgpu_kms_driver = { .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_import = amdgpu_gem_prime_import, - .gem_prime_mmap = amdgpu_gem_prime_mmap, + .gem_prime_mmap = drm_gem_prime_mmap, .name = DRIVER_NAME, .desc = DRIVER_DESC, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c index 311bcdc59eda..df78a06ef0c8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c @@ -41,6 +41,36 @@ static const struct drm_gem_object_funcs amdgpu_gem_object_funcs; +static vm_fault_t amdgpu_gem_fault(struct vm_fault *vmf) +{ + struct ttm_buffer_object *bo = vmf->vma->vm_private_data; + vm_fault_t ret; + + ret = ttm_bo_vm_reserve(bo, vmf); + if (ret) + return ret; + + ret = amdgpu_bo_fault_reserve_notify(bo); + if (ret) + goto unlock; + + ret = ttm_bo_vm_fault_reserved(vmf, vmf->vma->vm_page_prot, + TTM_BO_VM_NUM_PREFAULT, 1); + if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT)) + return ret; + +unlock: + dma_resv_unlock(bo->base.resv); + return ret; +} + +static const struct vm_operations_struct amdgpu_gem_vm_ops = { + .fault = amdgpu_gem_fault, + .open = ttm_bo_vm_open, + .close = ttm_bo_vm_close, + .access = ttm_bo_vm_access +}; + static void amdgpu_gem_object_free(struct drm_gem_object *gobj) { struct amdgpu_bo *robj = gem_to_amdgpu_bo(gobj); @@ -205,6 +235,18 @@ static void amdgpu_gem_object_close(struct drm_gem_object *obj, ttm_eu_backoff_reservation(&ticket, &list); } +static int amdgpu_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) +{ + struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); + + if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm)) + return -EPERM; + if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS) + return -EPERM; + + return drm_gem_ttm_mmap(obj, vma); +} + static const struct drm_gem_object_funcs amdgpu_gem_object_funcs = { .free = amdgpu_gem_object_free, .open = amdgpu_gem_object_open, @@ -212,6 +254,8 @@ static const struct drm_gem_object_funcs amdgpu_gem_object_funcs = { .export = amdgpu_gem_prime_export, .vmap = drm_gem_ttm_vmap, .vunmap = drm_gem_ttm_vunmap, + .mmap = amdgpu_gem_object_mmap, + .vm_ops = &amdgpu_gem_vm_ops, }; /* diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 1485f33c3cc7..d4083c19402b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -152,25 +152,6 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo, *placement = abo->placement; } -/** - * amdgpu_verify_access - Verify access for a mmap call - * - * @bo: The buffer object to map - * @filp: The file pointer from the process performing the mmap - * - * This is called by ttm_bo_mmap() to verify whether a process - * has the right to mmap a BO to their process space. - */ -static int amdgpu_verify_access(struct ttm_buffer_object *bo, struct file *filp) -{ - struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo); - - if (amdgpu_ttm_tt_get_usermm(bo->ttm)) - return -EPERM; - return drm_vma_node_verify_access(&abo->tbo.base.vma_node, - filp->private_data); -} - /** * amdgpu_ttm_map_buffer - Map memory into the GART windows * @bo: buffer object to map @@ -1522,7 +1503,6 @@ static struct ttm_device_funcs amdgpu_bo_driver = { .eviction_valuable = amdgpu_ttm_bo_eviction_valuable, .evict_flags = &amdgpu_evict_flags, .move = &amdgpu_bo_move, - .verify_access = &amdgpu_verify_access, .delete_mem_notify = &amdgpu_bo_delete_mem_notify, .release_notify = &amdgpu_bo_release_notify, .io_mem_reserve = &amdgpu_ttm_io_mem_reserve, @@ -1897,50 +1877,6 @@ void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable) adev->mman.buffer_funcs_enabled = enable; } -static vm_fault_t amdgpu_ttm_fault(struct vm_fault *vmf) -{ - struct ttm_buffer_object *bo = vmf->vma->vm_private_data; - vm_fault_t ret; - - ret = ttm_bo_vm_reserve(bo, vmf); - if (ret) - return ret; - - ret = amdgpu_bo_fault_reserve_notify(bo); - if (ret) - goto unlock; - - ret = ttm_bo_vm_fault_reserved(vmf, vmf->vma->vm_page_prot, - TTM_BO_VM_NUM_PREFAULT, 1); - if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT)) - return ret; - -unlock: - dma_resv_unlock(bo->base.resv); - return ret; -} - -static const struct vm_operations_struct amdgpu_ttm_vm_ops = { - .fault = amdgpu_ttm_fault, - .open = ttm_bo_vm_open, - .close = ttm_bo_vm_close, - .access = ttm_bo_vm_access -}; - -int amdgpu_mmap(struct file *filp, struct vm_area_struct *vma) -{ - struct drm_file *file_priv = filp->private_data; - struct amdgpu_device *adev = drm_to_adev(file_priv->minor->dev); - int r; - - r = ttm_bo_mmap(filp, vma, &adev->mman.bdev); - if (unlikely(r != 0)) - return r; - - vma->vm_ops = &amdgpu_ttm_vm_ops; - return 0; -} - int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset, uint64_t dst_offset, uint32_t byte_count, struct dma_resv *resv, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h index dec0db8b0b13..6e51faad7371 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h @@ -146,7 +146,6 @@ int amdgpu_fill_buffer(struct amdgpu_bo *bo, struct dma_resv *resv, struct dma_fence **fence); -int amdgpu_mmap(struct file *filp, struct vm_area_struct *vma); int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo); int amdgpu_ttm_recover_gart(struct ttm_buffer_object *tbo); uint64_t amdgpu_ttm_domain_start(struct amdgpu_device *adev, uint32_t type); -- 2.31.1 _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx