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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C5590C6FA82 for ; Wed, 28 Sep 2022 19:17:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234142AbiI1TRr (ORCPT ); Wed, 28 Sep 2022 15:17:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54042 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233820AbiI1TRg (ORCPT ); Wed, 28 Sep 2022 15:17:36 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9CC93E8D81; Wed, 28 Sep 2022 12:17:34 -0700 (PDT) Received: from dimapc.. (unknown [109.252.125.248]) (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 10460660229C; Wed, 28 Sep 2022 20:17:30 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1664392653; bh=45S+M9YrC4atv+yqFGCjIB90pcGMljXr98/AqjYL+QI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=a2HLD3YFN1pMj3YiEwOl+ThUlCtgIV9TrS28ZqFJJkea84yR01EUpqwsPrN1weUDk oC8uPtKGtMyQP/fAAFJgPYAankTFs5sfCayXyvuyhAUjdOf0qz6btvshsfIkLoFaaj 3CnqE60zowwH5vKrnOVtrw9kdUasyMUyeGo7oW3cEFeIpJWMJV7E3TxondSOBL+GJF WZnMKuN8xuNfFN7qa9gsC0ii6kPQOa3SWKoBqbE77dlLGdRnlIW1J0OxLxeTXOR8Yl L8Bb561MSY5FdcQ6AGFfK9RK1qle0U0+M0i4t0U+zMPU8JwGFxoJaYJiu5auN/g43F Ypc5vVG7bjD8Q== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Daniel Almeida , Gert Wollny , Gustavo Padovan , Daniel Stone , Tomeu Vizoso , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Clark , Sumit Semwal , =?UTF-8?q?Christian=20K=C3=B6nig?= , "Pan, Xinhui" , Thierry Reding , Tomasz Figa , Marek Szyprowski , Mauro Carvalho Chehab , Alex Deucher , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= , Qiang Yu , Srinivas Kandagatla , Amol Maheshwari , Jason Gunthorpe , Leon Romanovsky , Juergen Gross , Stefano Stabellini , Oleksandr Tyshchenko , Tomi Valkeinen , Russell King , Lucas Stach , Christian Gmeiner , Ruhl Michael J Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Dmitry Osipenko , linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, amd-gfx@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, kernel@collabora.com, virtualization@lists.linux-foundation.org, linux-rdma@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: [PATCH v6 03/21] drm/gem: Take reservation lock for vmap/vunmap operations Date: Wed, 28 Sep 2022 22:15:42 +0300 Message-Id: <20220928191600.5874-4-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20220928191600.5874-1-dmitry.osipenko@collabora.com> References: <20220928191600.5874-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org The new common dma-buf locking convention will require buffer importers to hold the reservation lock around mapping operations. Make DRM GEM core to take the lock around the vmapping operations and update DRM drivers to use the locked functions for the case where DRM core now holds the lock. This patch prepares DRM core and drivers to the common dynamic dma-buf locking convention. Acked-by: Christian König Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_client.c | 4 ++-- drivers/gpu/drm/drm_gem.c | 24 ++++++++++++++++++++ drivers/gpu/drm/drm_gem_dma_helper.c | 6 ++--- drivers/gpu/drm/drm_gem_framebuffer_helper.c | 6 ++--- drivers/gpu/drm/drm_gem_ttm_helper.c | 9 +------- drivers/gpu/drm/lima/lima_sched.c | 4 ++-- drivers/gpu/drm/panfrost/panfrost_dump.c | 4 ++-- drivers/gpu/drm/panfrost/panfrost_perfcnt.c | 6 ++--- drivers/gpu/drm/qxl/qxl_object.c | 17 +++++++------- drivers/gpu/drm/qxl/qxl_prime.c | 4 ++-- include/drm/drm_gem.h | 3 +++ 11 files changed, 54 insertions(+), 33 deletions(-) diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c index 2b230b4d6942..fbcb1e995384 100644 --- a/drivers/gpu/drm/drm_client.c +++ b/drivers/gpu/drm/drm_client.c @@ -323,7 +323,7 @@ drm_client_buffer_vmap(struct drm_client_buffer *buffer, * fd_install step out of the driver backend hooks, to make that * final step optional for internal users. */ - ret = drm_gem_vmap(buffer->gem, map); + ret = drm_gem_vmap_unlocked(buffer->gem, map); if (ret) return ret; @@ -345,7 +345,7 @@ void drm_client_buffer_vunmap(struct drm_client_buffer *buffer) { struct iosys_map *map = &buffer->map; - drm_gem_vunmap(buffer->gem, map); + drm_gem_vunmap_unlocked(buffer->gem, map); } EXPORT_SYMBOL(drm_client_buffer_vunmap); diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index 8b68a3c1e6ab..b8db675e7fb5 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -1158,6 +1158,8 @@ int drm_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map) { int ret; + dma_resv_assert_held(obj->resv); + if (!obj->funcs->vmap) return -EOPNOTSUPP; @@ -1173,6 +1175,8 @@ EXPORT_SYMBOL(drm_gem_vmap); void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map) { + dma_resv_assert_held(obj->resv); + if (iosys_map_is_null(map)) return; @@ -1184,6 +1188,26 @@ void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map) } EXPORT_SYMBOL(drm_gem_vunmap); +int drm_gem_vmap_unlocked(struct drm_gem_object *obj, struct iosys_map *map) +{ + int ret; + + dma_resv_lock(obj->resv, NULL); + ret = drm_gem_vmap(obj, map); + dma_resv_unlock(obj->resv); + + return ret; +} +EXPORT_SYMBOL(drm_gem_vmap_unlocked); + +void drm_gem_vunmap_unlocked(struct drm_gem_object *obj, struct iosys_map *map) +{ + dma_resv_lock(obj->resv, NULL); + drm_gem_vunmap(obj, map); + dma_resv_unlock(obj->resv); +} +EXPORT_SYMBOL(drm_gem_vunmap_unlocked); + /** * drm_gem_lock_reservations - Sets up the ww context and acquires * the lock on an array of GEM objects. diff --git a/drivers/gpu/drm/drm_gem_dma_helper.c b/drivers/gpu/drm/drm_gem_dma_helper.c index f6901ff97bbb..1e658c448366 100644 --- a/drivers/gpu/drm/drm_gem_dma_helper.c +++ b/drivers/gpu/drm/drm_gem_dma_helper.c @@ -230,7 +230,7 @@ void drm_gem_dma_free(struct drm_gem_dma_object *dma_obj) if (gem_obj->import_attach) { if (dma_obj->vaddr) - dma_buf_vunmap(gem_obj->import_attach->dmabuf, &map); + dma_buf_vunmap_unlocked(gem_obj->import_attach->dmabuf, &map); drm_prime_gem_destroy(gem_obj, dma_obj->sgt); } else if (dma_obj->vaddr) { if (dma_obj->map_noncoherent) @@ -581,7 +581,7 @@ drm_gem_dma_prime_import_sg_table_vmap(struct drm_device *dev, struct iosys_map map; int ret; - ret = dma_buf_vmap(attach->dmabuf, &map); + ret = dma_buf_vmap_unlocked(attach->dmabuf, &map); if (ret) { DRM_ERROR("Failed to vmap PRIME buffer\n"); return ERR_PTR(ret); @@ -589,7 +589,7 @@ drm_gem_dma_prime_import_sg_table_vmap(struct drm_device *dev, obj = drm_gem_dma_prime_import_sg_table(dev, attach, sgt); if (IS_ERR(obj)) { - dma_buf_vunmap(attach->dmabuf, &map); + dma_buf_vunmap_unlocked(attach->dmabuf, &map); return obj; } diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c b/drivers/gpu/drm/drm_gem_framebuffer_helper.c index 880a4975507f..e35e224e6303 100644 --- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c +++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c @@ -354,7 +354,7 @@ int drm_gem_fb_vmap(struct drm_framebuffer *fb, struct iosys_map *map, ret = -EINVAL; goto err_drm_gem_vunmap; } - ret = drm_gem_vmap(obj, &map[i]); + ret = drm_gem_vmap_unlocked(obj, &map[i]); if (ret) goto err_drm_gem_vunmap; } @@ -376,7 +376,7 @@ int drm_gem_fb_vmap(struct drm_framebuffer *fb, struct iosys_map *map, obj = drm_gem_fb_get_obj(fb, i); if (!obj) continue; - drm_gem_vunmap(obj, &map[i]); + drm_gem_vunmap_unlocked(obj, &map[i]); } return ret; } @@ -403,7 +403,7 @@ void drm_gem_fb_vunmap(struct drm_framebuffer *fb, struct iosys_map *map) continue; if (iosys_map_is_null(&map[i])) continue; - drm_gem_vunmap(obj, &map[i]); + drm_gem_vunmap_unlocked(obj, &map[i]); } } EXPORT_SYMBOL(drm_gem_fb_vunmap); diff --git a/drivers/gpu/drm/drm_gem_ttm_helper.c b/drivers/gpu/drm/drm_gem_ttm_helper.c index e5fc875990c4..d5962a34c01d 100644 --- a/drivers/gpu/drm/drm_gem_ttm_helper.c +++ b/drivers/gpu/drm/drm_gem_ttm_helper.c @@ -64,13 +64,8 @@ int drm_gem_ttm_vmap(struct drm_gem_object *gem, struct iosys_map *map) { struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem); - int ret; - - dma_resv_lock(gem->resv, NULL); - ret = ttm_bo_vmap(bo, map); - dma_resv_unlock(gem->resv); - return ret; + return ttm_bo_vmap(bo, map); } EXPORT_SYMBOL(drm_gem_ttm_vmap); @@ -87,9 +82,7 @@ void drm_gem_ttm_vunmap(struct drm_gem_object *gem, { struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem); - dma_resv_lock(gem->resv, NULL); ttm_bo_vunmap(bo, map); - dma_resv_unlock(gem->resv); } EXPORT_SYMBOL(drm_gem_ttm_vunmap); diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c index e82931712d8a..ff003403fbbc 100644 --- a/drivers/gpu/drm/lima/lima_sched.c +++ b/drivers/gpu/drm/lima/lima_sched.c @@ -371,7 +371,7 @@ static void lima_sched_build_error_task_list(struct lima_sched_task *task) } else { buffer_chunk->size = lima_bo_size(bo); - ret = drm_gem_shmem_vmap(&bo->base, &map); + ret = drm_gem_vmap_unlocked(&bo->base.base, &map); if (ret) { kvfree(et); goto out; @@ -379,7 +379,7 @@ static void lima_sched_build_error_task_list(struct lima_sched_task *task) memcpy(buffer_chunk + 1, map.vaddr, buffer_chunk->size); - drm_gem_shmem_vunmap(&bo->base, &map); + drm_gem_vunmap_unlocked(&bo->base.base, &map); } buffer_chunk = (void *)(buffer_chunk + 1) + buffer_chunk->size; diff --git a/drivers/gpu/drm/panfrost/panfrost_dump.c b/drivers/gpu/drm/panfrost/panfrost_dump.c index 89056a1aac7d..f62a019cc523 100644 --- a/drivers/gpu/drm/panfrost/panfrost_dump.c +++ b/drivers/gpu/drm/panfrost/panfrost_dump.c @@ -209,7 +209,7 @@ void panfrost_core_dump(struct panfrost_job *job) goto dump_header; } - ret = drm_gem_shmem_vmap(&bo->base, &map); + ret = drm_gem_vmap_unlocked(&bo->base.base, &map); if (ret) { dev_err(pfdev->dev, "Panfrost Dump: couldn't map Buffer Object\n"); iter.hdr->bomap.valid = 0; @@ -236,7 +236,7 @@ void panfrost_core_dump(struct panfrost_job *job) vaddr = map.vaddr; memcpy(iter.data, vaddr, bo->base.base.size); - drm_gem_shmem_vunmap(&bo->base, &map); + drm_gem_vunmap_unlocked(&bo->base.base, &map); iter.hdr->bomap.valid = cpu_to_le32(1); diff --git a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c index bc0df93f7f21..ba9b6e2b2636 100644 --- a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c +++ b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c @@ -106,7 +106,7 @@ static int panfrost_perfcnt_enable_locked(struct panfrost_device *pfdev, goto err_close_bo; } - ret = drm_gem_shmem_vmap(bo, &map); + ret = drm_gem_vmap_unlocked(&bo->base, &map); if (ret) goto err_put_mapping; perfcnt->buf = map.vaddr; @@ -165,7 +165,7 @@ static int panfrost_perfcnt_enable_locked(struct panfrost_device *pfdev, return 0; err_vunmap: - drm_gem_shmem_vunmap(bo, &map); + drm_gem_vunmap_unlocked(&bo->base, &map); err_put_mapping: panfrost_gem_mapping_put(perfcnt->mapping); err_close_bo: @@ -195,7 +195,7 @@ static int panfrost_perfcnt_disable_locked(struct panfrost_device *pfdev, GPU_PERFCNT_CFG_MODE(GPU_PERFCNT_CFG_MODE_OFF)); perfcnt->user = NULL; - drm_gem_shmem_vunmap(&perfcnt->mapping->obj->base, &map); + drm_gem_vunmap_unlocked(&perfcnt->mapping->obj->base.base, &map); perfcnt->buf = NULL; panfrost_gem_close(&perfcnt->mapping->obj->base.base, file_priv); panfrost_mmu_as_put(pfdev, perfcnt->mapping->mmu); diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c index 695d9308d1f0..06a58dad5f5c 100644 --- a/drivers/gpu/drm/qxl/qxl_object.c +++ b/drivers/gpu/drm/qxl/qxl_object.c @@ -168,9 +168,16 @@ int qxl_bo_vmap_locked(struct qxl_bo *bo, struct iosys_map *map) bo->map_count++; goto out; } - r = ttm_bo_vmap(&bo->tbo, &bo->map); + + r = __qxl_bo_pin(bo); if (r) return r; + + r = ttm_bo_vmap(&bo->tbo, &bo->map); + if (r) { + __qxl_bo_unpin(bo); + return r; + } bo->map_count = 1; /* TODO: Remove kptr in favor of map everywhere. */ @@ -192,12 +199,6 @@ int qxl_bo_vmap(struct qxl_bo *bo, struct iosys_map *map) if (r) return r; - r = __qxl_bo_pin(bo); - if (r) { - qxl_bo_unreserve(bo); - return r; - } - r = qxl_bo_vmap_locked(bo, map); qxl_bo_unreserve(bo); return r; @@ -247,6 +248,7 @@ void qxl_bo_vunmap_locked(struct qxl_bo *bo) return; bo->kptr = NULL; ttm_bo_vunmap(&bo->tbo, &bo->map); + __qxl_bo_unpin(bo); } int qxl_bo_vunmap(struct qxl_bo *bo) @@ -258,7 +260,6 @@ int qxl_bo_vunmap(struct qxl_bo *bo) return r; qxl_bo_vunmap_locked(bo); - __qxl_bo_unpin(bo); qxl_bo_unreserve(bo); return 0; } diff --git a/drivers/gpu/drm/qxl/qxl_prime.c b/drivers/gpu/drm/qxl/qxl_prime.c index 142d01415acb..9169c26357d3 100644 --- a/drivers/gpu/drm/qxl/qxl_prime.c +++ b/drivers/gpu/drm/qxl/qxl_prime.c @@ -59,7 +59,7 @@ int qxl_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map) struct qxl_bo *bo = gem_to_qxl_bo(obj); int ret; - ret = qxl_bo_vmap(bo, map); + ret = qxl_bo_vmap_locked(bo, map); if (ret < 0) return ret; @@ -71,5 +71,5 @@ void qxl_gem_prime_vunmap(struct drm_gem_object *obj, { struct qxl_bo *bo = gem_to_qxl_bo(obj); - qxl_bo_vunmap(bo); + qxl_bo_vunmap_locked(bo); } diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h index bd42f25e449c..f4d898ae0fb0 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -475,4 +475,7 @@ void drm_gem_lru_move_tail(struct drm_gem_lru *lru, struct drm_gem_object *obj); unsigned long drm_gem_lru_scan(struct drm_gem_lru *lru, unsigned nr_to_scan, bool (*shrink)(struct drm_gem_object *obj)); +int drm_gem_vmap_unlocked(struct drm_gem_object *obj, struct iosys_map *map); +void drm_gem_vunmap_unlocked(struct drm_gem_object *obj, struct iosys_map *map); + #endif /* __DRM_GEM_H__ */ -- 2.37.3