From patchwork Sun Aug 27 17:54:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367363 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 CB2F3C83F11 for ; Sun, 27 Aug 2023 17:56:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 23F1B10E1C6; Sun, 27 Aug 2023 17:55:57 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by gabe.freedesktop.org (Postfix) with ESMTPS id 36C7A10E076; Sun, 27 Aug 2023 17:55:53 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 5CC4E6601F5E; Sun, 27 Aug 2023 18:55:50 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158952; bh=gy3uY3hU4b+eh09ptffZWw3oZWkfKZfl7NLeYKVx5Jk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NlxF6k3TIR0ANfnT1O22Rl0rf3oPZv1weESs2Xw2/PCHO1BIIEGilAghh23PVab9g yUzsPIJ4UgqraCOf2hFv5n5GU9HDhH9pu4ar/JY8JOuX+azdt2qVHZiHrU5avMAfia 6tIEZlJie1qXJdIUMK4dCzImzgdkAfWqGUyAoDYEn+VIcbStfa15X/TFQD3zPsLE49 2zE3Vx8gv/4lsz0/GVdpeBq4ySaXqZzUT9z/BUmeIIfC/aW1Lke+FWYAuuC6D/EpTu WmdB0wttRAjfK/huSn7IT+dKaDX4K0q4xs5cQJvwy7HWnCSqPbi/83REQfHNFOP0/Q l+sd/EkJo4Gwg== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:27 +0300 Message-ID: <20230827175449.1766701-2-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 01/23] drm/shmem-helper: Fix UAF in error path when freeing SGT of imported GEM X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Freeing drm-shmem GEM right after creating it using drm_gem_shmem_prime_import_sg_table() frees SGT of the imported dma-buf and then dma-buf frees this SGT second time. The v3d_prime_import_sg_table() is example of a error code path where dma-buf's SGT is freed by drm-shmem and then it's freed second time by dma_buf_unmap_attachment() in drm_gem_prime_import_dev(). Add drm-shmem GEM flag telling that this is imported SGT shall not be treated as own SGT, fixing the use-after-free bug. Cc: stable@vger.kernel.org Fixes: 2194a63a818d ("drm: Add library for shmem backed GEM objects") Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem_shmem_helper.c | 3 ++- include/drm/drm_gem_shmem_helper.h | 7 +++++++ 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index a783d2245599..78d9cf2355a5 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -141,7 +141,7 @@ void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem) if (obj->import_attach) { drm_prime_gem_destroy(obj, shmem->sgt); - } else { + } else if (!shmem->imported_sgt) { dma_resv_lock(shmem->base.resv, NULL); drm_WARN_ON(obj->dev, shmem->vmap_use_count); @@ -758,6 +758,7 @@ drm_gem_shmem_prime_import_sg_table(struct drm_device *dev, return ERR_CAST(shmem); shmem->sgt = sgt; + shmem->imported_sgt = true; drm_dbg_prime(dev, "size = %zu\n", size); diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h index bf0c31aa8fbe..ec70a98a8fe1 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -73,6 +73,13 @@ struct drm_gem_shmem_object { */ unsigned int vmap_use_count; + /** + * @imported_sgt: + * + * True if SG table belongs to imported dma-buf. + */ + bool imported_sgt : 1; + /** * @pages_mark_dirty_on_put: * From patchwork Sun Aug 27 17:54:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367362 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 A67BAC83F01 for ; Sun, 27 Aug 2023 17:56:05 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EA89B10E1C2; Sun, 27 Aug 2023 17:55:56 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by gabe.freedesktop.org (Postfix) with ESMTPS id C9F3D10E1C2; Sun, 27 Aug 2023 17:55:54 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 2FD7F6607084; Sun, 27 Aug 2023 18:55:52 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158953; bh=noUNGit24aWm5+1m4sEixfN2bl0LkhYbrAV9hISCEws=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aDF95ldYyMt40X6CslVv4iO57vF5BcfnlMLrxtC1csAcnwI0swf40spqY80l6rTBk GNyDMUusYNqdG7YIFUYICt+xCkvpqRBA6m59EdXlIdBsnFSJK83YuRzxaRekCDORa+ niCZZFUTvgXyT/D0zhbgJo31XRk3+IHtcsYpJJJNtl1MddTXzGTFFLLEz8+btYdhlV 7ofS86NiyONtcCHCOQJKulBQzgC+4PY8ljY1YR3xAU3T2S66YWnw+XRnOyqI42DWl9 UNnzPzvCLFPi4LtB3/R4M5D3jxmX+EObN2ias6YMK0okJQGc39R45cNJ2euxVYVc0N h0zcDdDwUXauQ== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:28 +0300 Message-ID: <20230827175449.1766701-3-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 02/23] drm/shmem-helper: Use flag for tracking page count bumped by get_pages_sgt() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Use separate flag for tracking page count bumped by shmem->sgt to avoid imbalanced page counter during of drm_gem_shmem_free() time. It's fragile to assume that populated shmem->pages at a freeing time means that the count was bumped by drm_gem_shmem_get_pages_sgt(), using a flag removes the ambiguity. Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem_shmem_helper.c | 3 ++- drivers/gpu/drm/lima/lima_gem.c | 1 + include/drm/drm_gem_shmem_helper.h | 7 +++++++ 3 files changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index 78d9cf2355a5..db20b9123891 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -152,7 +152,7 @@ void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem) sg_free_table(shmem->sgt); kfree(shmem->sgt); } - if (shmem->pages) + if (shmem->got_sgt) drm_gem_shmem_put_pages(shmem); drm_WARN_ON(obj->dev, shmem->pages_use_count); @@ -687,6 +687,7 @@ static struct sg_table *drm_gem_shmem_get_pages_sgt_locked(struct drm_gem_shmem_ if (ret) goto err_free_sgt; + shmem->got_sgt = true; shmem->sgt = sgt; return sgt; diff --git a/drivers/gpu/drm/lima/lima_gem.c b/drivers/gpu/drm/lima/lima_gem.c index 4f9736e5f929..28602302c281 100644 --- a/drivers/gpu/drm/lima/lima_gem.c +++ b/drivers/gpu/drm/lima/lima_gem.c @@ -89,6 +89,7 @@ int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm) } *bo->base.sgt = sgt; + bo->base.got_sgt = true; if (vm) { ret = lima_vm_map_bo(vm, bo, old_size >> PAGE_SHIFT); diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h index ec70a98a8fe1..f87124629bb5 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -73,6 +73,13 @@ struct drm_gem_shmem_object { */ unsigned int vmap_use_count; + /** + * @got_sgt: + * + * True if SG table was retrieved using drm_gem_shmem_get_pages_sgt() + */ + bool got_sgt : 1; + /** * @imported_sgt: * From patchwork Sun Aug 27 17:54:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367367 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 316C1C83F11 for ; Sun, 27 Aug 2023 17:56:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 16D8E10E1D5; Sun, 27 Aug 2023 17:56:08 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by gabe.freedesktop.org (Postfix) with ESMTPS id 804B510E1C6; Sun, 27 Aug 2023 17:55:56 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 E147966071A0; Sun, 27 Aug 2023 18:55:53 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158955; bh=kHs6hGpWk8GyISlC9i8obNQGoUTYKAHITUEwxqD4fTc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EExfh5kCZS12EMrV51BMRfeI2Z5z23zv4dtO177A/uTCxfwHu+4L3V2LAerYvqU+R ZinxfZtH4MjTcO4hh3NEt9pzoBg3zazvkvXueHzuiGjEEvBNz62JC1vXp/MEle/BdD YV0abR5BevPzRQzA4lzxyW9uPeMH3L6KjnyNMRMLd6XHJJAZVRvKdrQyjyZPJjZz4l NPBe+9PCsO17R3vdpkewsF3VwX01BADG9y9WSCxbxI6NbibN06LqB81iZrt8fx9F5Q ZvhqkgYPsyu2P6gxM4geUHLY4U86O/+j+tUb8CCKWFhz2IjxTgRA5clYr5wUwu1mt8 SJ5sYBJddxaJA== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:29 +0300 Message-ID: <20230827175449.1766701-4-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 03/23] drm/gem: Change locked/unlocked postfix of drm_gem_v/unmap() function names X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Make drm/gem API function names consistent by having locked function use the _locked postfix in the name, while the unlocked variants don't use the _unlocked postfix. Rename drm_gem_v/unmap() function names to make them consistent with the rest of the API functions. Suggested-by: Boris Brezillon Signed-off-by: Dmitry Osipenko Reviewed-by: Boris Brezillon --- drivers/gpu/drm/drm_client.c | 6 +++--- drivers/gpu/drm/drm_gem.c | 20 ++++++++++---------- drivers/gpu/drm/drm_gem_framebuffer_helper.c | 6 +++--- drivers/gpu/drm/drm_internal.h | 4 ++-- drivers/gpu/drm/drm_prime.c | 4 ++-- drivers/gpu/drm/lima/lima_sched.c | 4 ++-- drivers/gpu/drm/panfrost/panfrost_dump.c | 4 ++-- drivers/gpu/drm/panfrost/panfrost_perfcnt.c | 6 +++--- include/drm/drm_gem.h | 4 ++-- 9 files changed, 29 insertions(+), 29 deletions(-) diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c index 037e36f2049c..29306657117a 100644 --- a/drivers/gpu/drm/drm_client.c +++ b/drivers/gpu/drm/drm_client.c @@ -265,7 +265,7 @@ void drm_client_dev_restore(struct drm_device *dev) static void drm_client_buffer_delete(struct drm_client_buffer *buffer) { if (buffer->gem) { - drm_gem_vunmap_unlocked(buffer->gem, &buffer->map); + drm_gem_vunmap(buffer->gem, &buffer->map); drm_gem_object_put(buffer->gem); } @@ -349,7 +349,7 @@ 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_unlocked(buffer->gem, map); + ret = drm_gem_vmap(buffer->gem, map); if (ret) return ret; @@ -371,7 +371,7 @@ void drm_client_buffer_vunmap(struct drm_client_buffer *buffer) { struct iosys_map *map = &buffer->map; - drm_gem_vunmap_unlocked(buffer->gem, map); + drm_gem_vunmap(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 6129b89bb366..fae5832bb0bd 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -1173,7 +1173,7 @@ void drm_gem_unpin(struct drm_gem_object *obj) obj->funcs->unpin(obj); } -int drm_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map) +int drm_gem_vmap_locked(struct drm_gem_object *obj, struct iosys_map *map) { int ret; @@ -1190,9 +1190,9 @@ int drm_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map) return 0; } -EXPORT_SYMBOL(drm_gem_vmap); +EXPORT_SYMBOL(drm_gem_vmap_locked); -void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map) +void drm_gem_vunmap_locked(struct drm_gem_object *obj, struct iosys_map *map) { dma_resv_assert_held(obj->resv); @@ -1205,27 +1205,27 @@ void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map) /* Always set the mapping to NULL. Callers may rely on this. */ iosys_map_clear(map); } -EXPORT_SYMBOL(drm_gem_vunmap); +EXPORT_SYMBOL(drm_gem_vunmap_locked); -int drm_gem_vmap_unlocked(struct drm_gem_object *obj, struct iosys_map *map) +int drm_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map) { int ret; dma_resv_lock(obj->resv, NULL); - ret = drm_gem_vmap(obj, map); + ret = drm_gem_vmap_locked(obj, map); dma_resv_unlock(obj->resv); return ret; } -EXPORT_SYMBOL(drm_gem_vmap_unlocked); +EXPORT_SYMBOL(drm_gem_vmap); -void drm_gem_vunmap_unlocked(struct drm_gem_object *obj, struct iosys_map *map) +void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map) { dma_resv_lock(obj->resv, NULL); - drm_gem_vunmap(obj, map); + drm_gem_vunmap_locked(obj, map); dma_resv_unlock(obj->resv); } -EXPORT_SYMBOL(drm_gem_vunmap_unlocked); +EXPORT_SYMBOL(drm_gem_vunmap); /** * drm_gem_lock_reservations - Sets up the ww context and acquires diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c b/drivers/gpu/drm/drm_gem_framebuffer_helper.c index 3bdb6ba37ff4..3808f47310bf 100644 --- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c +++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c @@ -362,7 +362,7 @@ int drm_gem_fb_vmap(struct drm_framebuffer *fb, struct iosys_map *map, ret = -EINVAL; goto err_drm_gem_vunmap; } - ret = drm_gem_vmap_unlocked(obj, &map[i]); + ret = drm_gem_vmap(obj, &map[i]); if (ret) goto err_drm_gem_vunmap; } @@ -384,7 +384,7 @@ 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_unlocked(obj, &map[i]); + drm_gem_vunmap(obj, &map[i]); } return ret; } @@ -411,7 +411,7 @@ 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_unlocked(obj, &map[i]); + drm_gem_vunmap(obj, &map[i]); } } EXPORT_SYMBOL(drm_gem_fb_vunmap); diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h index ba12acd55139..243d9aa52881 100644 --- a/drivers/gpu/drm/drm_internal.h +++ b/drivers/gpu/drm/drm_internal.h @@ -175,8 +175,8 @@ void drm_gem_print_info(struct drm_printer *p, unsigned int indent, int drm_gem_pin(struct drm_gem_object *obj); void drm_gem_unpin(struct drm_gem_object *obj); -int drm_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map); -void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map); +int drm_gem_vmap_locked(struct drm_gem_object *obj, struct iosys_map *map); +void drm_gem_vunmap_locked(struct drm_gem_object *obj, struct iosys_map *map); /* drm_debugfs.c drm_debugfs_crc.c */ #if defined(CONFIG_DEBUG_FS) diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index 63b709a67471..57ac5623f09a 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -682,7 +682,7 @@ int drm_gem_dmabuf_vmap(struct dma_buf *dma_buf, struct iosys_map *map) { struct drm_gem_object *obj = dma_buf->priv; - return drm_gem_vmap(obj, map); + return drm_gem_vmap_locked(obj, map); } EXPORT_SYMBOL(drm_gem_dmabuf_vmap); @@ -698,7 +698,7 @@ void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, struct iosys_map *map) { struct drm_gem_object *obj = dma_buf->priv; - drm_gem_vunmap(obj, map); + drm_gem_vunmap_locked(obj, map); } EXPORT_SYMBOL(drm_gem_dmabuf_vunmap); diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c index ffd91a5ee299..843487128544 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_vmap_unlocked(&bo->base.base, &map); + ret = drm_gem_vmap(&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_vunmap_unlocked(&bo->base.base, &map); + drm_gem_vunmap(&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 e7942ac449c6..0f30bbea9895 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_vmap_unlocked(&bo->base.base, &map); + ret = drm_gem_vmap(&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_vunmap_unlocked(&bo->base.base, &map); + drm_gem_vunmap(&bo->base.base, &map); iter.hdr->bomap.valid = 1; diff --git a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c index ba9b6e2b2636..52befead08c6 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_vmap_unlocked(&bo->base, &map); + ret = drm_gem_vmap(&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_vunmap_unlocked(&bo->base, &map); + drm_gem_vunmap(&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_vunmap_unlocked(&perfcnt->mapping->obj->base.base, &map); + drm_gem_vunmap(&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/include/drm/drm_gem.h b/include/drm/drm_gem.h index c0b13c43b459..f338f8cfacf7 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -518,8 +518,8 @@ struct page **drm_gem_get_pages(struct drm_gem_object *obj); void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages, bool dirty, bool accessed); -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); +int drm_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map); +void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map); int drm_gem_objects_lookup(struct drm_file *filp, void __user *bo_handles, int count, struct drm_gem_object ***objs_out); From patchwork Sun Aug 27 17:54:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367365 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 79AA5C83F10 for ; Sun, 27 Aug 2023 17:56:18 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 884C010E1D4; Sun, 27 Aug 2023 17:56:07 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7D4B010E1C8; Sun, 27 Aug 2023 17:55:58 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 9E3C166056FC; Sun, 27 Aug 2023 18:55:55 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158957; bh=07/1K7/qlWAExSgWA4WsYDHlbTQXKp97hh5kmC1Ec0o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PSppcjfCMi97GptL8IPoZH+YHzU4q0opjzeXBcez2Vju7FaR90cfkrFg//3JhRsJ+ Ajt7qHyU1C7BG0pLydCzLamNm5tHVPclu6WrBixjmvCSSVLkBijDungmMcrUbTnZ1y 0ilnatbhE52USdY85pLq4Lchc8KrwGj9MT97hlpyEoN+RxF18AJnmx58gBqMz1l2+4 C6ZilnRdLhZmYTB6Oofwke+yLE3yKBnQVSG0gBTBvKRBB0lIoCEQBSVXP2gU5I8b/0 GRECWzauJKu+bD6KdiwPdWavqaavMkZs0HVe6+VrJzQZpdmoWb87ApxSlaEUQnxv8F TlTC7Zf0+LQug== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:30 +0300 Message-ID: <20230827175449.1766701-5-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 04/23] drm/gem: Add _locked postfix to functions that have unlocked counterpart X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Add _locked postfix to drm_gem functions that have unlocked counterpart functions to make GEM functions naming more consistent and intuitive in regards to the locking requirements. Suggested-by: Boris Brezillon Signed-off-by: Dmitry Osipenko Reviewed-by: Boris Brezillon --- drivers/gpu/drm/drm_gem.c | 6 +++--- include/drm/drm_gem.h | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index fae5832bb0bd..8c0268944199 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -1488,10 +1488,10 @@ drm_gem_lru_scan(struct drm_gem_lru *lru, EXPORT_SYMBOL(drm_gem_lru_scan); /** - * drm_gem_evict - helper to evict backing pages for a GEM object + * drm_gem_evict_locked - helper to evict backing pages for a GEM object * @obj: obj in question */ -int drm_gem_evict(struct drm_gem_object *obj) +int drm_gem_evict_locked(struct drm_gem_object *obj) { dma_resv_assert_held(obj->resv); @@ -1503,4 +1503,4 @@ int drm_gem_evict(struct drm_gem_object *obj) return 0; } -EXPORT_SYMBOL(drm_gem_evict); +EXPORT_SYMBOL(drm_gem_evict_locked); diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h index f338f8cfacf7..e78e6d817451 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -542,7 +542,7 @@ unsigned long drm_gem_lru_scan(struct drm_gem_lru *lru, unsigned long *remaining, bool (*shrink)(struct drm_gem_object *obj)); -int drm_gem_evict(struct drm_gem_object *obj); +int drm_gem_evict_locked(struct drm_gem_object *obj); #ifdef CONFIG_LOCKDEP /** From patchwork Sun Aug 27 17:54:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367369 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 BB3DDC83F01 for ; Sun, 27 Aug 2023 17:56:21 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 880B510E1D6; Sun, 27 Aug 2023 17:56:09 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by gabe.freedesktop.org (Postfix) with ESMTPS id ECE8E10E1CA; Sun, 27 Aug 2023 17:55:59 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 5C5E26607292; Sun, 27 Aug 2023 18:55:57 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158958; bh=fRLodgl07tao4BtPSyoT/6xlg7PcCsmg2piBCDZKcAU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lOxsFutvOy82n/HQXsWuaGGvlEqrq/nG930pNUXbYmBwnOzsoos8vkso6yOcZ4zAd hkLSvZJGhzuIHGN/k0/GWqfcncvCIwdH1vxMaSM54u7F5AT1ogwhC0m9HRZqnHTiWh hWnm4daKqxNu/a6NCXAiDgteXCymB06nGx0CHnCRal4YFYKbFxc4GSvyyb6eQzwwPi xwyW6+dHy3WgzJsS0UlETtllcpATGpVSUQdIvlIBB2sxsZG1/7vLcJGYsr/mRsv74d O33Gy1V1d0yfijqbnL63qIgw17Ln4W1lPncMU0YDf0qrAppvD1hL5Z9IHt2GWUWaF5 DkZxBCiNkKT/w== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:31 +0300 Message-ID: <20230827175449.1766701-6-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 05/23] drm/v3d: Replace open-coded drm_gem_shmem_free() with drm_gem_object_put() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" The drm_gem_shmem_free() doesn't put GEM's kref to zero, which becomes important with addition of the shrinker support to drm-shmem that will use kref=0 in order to prevent taking lock during special GEM-freeing time in order to avoid spurious lockdep warning about locking ordering vs fs_reclaim code paths. Replace open-coded drm_gem_shmem_free() with drm_gem_object_put() that drops kref to zero before freeing GEM. Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/v3d/v3d_bo.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/v3d/v3d_bo.c b/drivers/gpu/drm/v3d/v3d_bo.c index 8b3229a37c6d..70c1095d6eec 100644 --- a/drivers/gpu/drm/v3d/v3d_bo.c +++ b/drivers/gpu/drm/v3d/v3d_bo.c @@ -33,16 +33,18 @@ void v3d_free_object(struct drm_gem_object *obj) struct v3d_dev *v3d = to_v3d_dev(obj->dev); struct v3d_bo *bo = to_v3d_bo(obj); - v3d_mmu_remove_ptes(bo); + if (drm_mm_node_allocated(&bo->node)) { + v3d_mmu_remove_ptes(bo); - mutex_lock(&v3d->bo_lock); - v3d->bo_stats.num_allocated--; - v3d->bo_stats.pages_allocated -= obj->size >> PAGE_SHIFT; - mutex_unlock(&v3d->bo_lock); + mutex_lock(&v3d->bo_lock); + v3d->bo_stats.num_allocated--; + v3d->bo_stats.pages_allocated -= obj->size >> PAGE_SHIFT; + mutex_unlock(&v3d->bo_lock); - spin_lock(&v3d->mm_lock); - drm_mm_remove_node(&bo->node); - spin_unlock(&v3d->mm_lock); + spin_lock(&v3d->mm_lock); + drm_mm_remove_node(&bo->node); + spin_unlock(&v3d->mm_lock); + } /* GPU execution may have dirtied any pages in the BO. */ bo->base.pages_mark_dirty_on_put = true; @@ -142,7 +144,7 @@ struct v3d_bo *v3d_bo_create(struct drm_device *dev, struct drm_file *file_priv, return bo; free_obj: - drm_gem_shmem_free(shmem_obj); + drm_gem_object_put(&shmem_obj->base); return ERR_PTR(ret); } @@ -160,7 +162,7 @@ v3d_prime_import_sg_table(struct drm_device *dev, ret = v3d_bo_create_finish(obj); if (ret) { - drm_gem_shmem_free(&to_v3d_bo(obj)->base); + drm_gem_object_put(obj); return ERR_PTR(ret); } From patchwork Sun Aug 27 17:54:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367364 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 B6F72C83F01 for ; Sun, 27 Aug 2023 17:56:17 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6B0B110E1CD; Sun, 27 Aug 2023 17:56:06 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id D28E210E1CA; Sun, 27 Aug 2023 17:56:01 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 111456603102; Sun, 27 Aug 2023 18:55:59 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158960; bh=+AikQZciT7OSpx2D1soEKFZvpuAqTt4uGz0mu/TZmic=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bk4iMw4SDUP8D0NGbf/p5abJRarJ2TfiexyUhcJBk1M/tPRHHJi/p5X6xSzkG4jAb EI/+cbDKL9pZWMSAj1jdpwVp5xGjC4xeCBlbXimUCEkgl7BgiR3gUhUy/mRxnxyySp HCk268ylTeio87huL3l7YO7IgVtuDIPpx5cPi5V6UyhgeA1LoDLszqVDrbJgYL8Yo1 PQMWDw88O78T7NjugKy/B5cZjR8UULrDBEE9rrw6kBY4IqOnbgJLjEPHccIeJd09Ia HZarHPeEoGWmgAK0rTuOeEs/DVNJ/R0HJ+jk62h+kr2MBO1FdP0mIkuVAyFLuVvp55 UVs/cBLzx7nkw== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:32 +0300 Message-ID: <20230827175449.1766701-7-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 06/23] drm/virtio: Replace drm_gem_shmem_free() with drm_gem_object_put() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Prepare virtio_gpu_object_create() to addition of memory shrinker support by replacing open-coded drm_gem_shmem_free() with drm_gem_object_put() that decrements GEM refcount to 0, which becomes important for drm-shmem because it will start to use GEM's refcount during the shmem's BO freeing time in order to prevent spurious lockdep warning about resv lock ordering vs fs_reclaim code paths. Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/virtio/virtgpu_object.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c index c7e74cf13022..343b13428125 100644 --- a/drivers/gpu/drm/virtio/virtgpu_object.c +++ b/drivers/gpu/drm/virtio/virtgpu_object.c @@ -244,6 +244,6 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev, err_put_id: virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle); err_free_gem: - drm_gem_shmem_free(shmem_obj); + drm_gem_object_put(&bo->base.base); return ret; } From patchwork Sun Aug 27 17:54:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367368 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 6DC24C83F16 for ; Sun, 27 Aug 2023 17:56:20 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2A6C610E1DA; Sun, 27 Aug 2023 17:56:09 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id AF8C610E1CC; Sun, 27 Aug 2023 17:56:03 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 CE05E660729C; Sun, 27 Aug 2023 18:56:00 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158962; bh=BNTmxQOM46+HQ6UEvSllq5xIsj79DPU82tEdZSTZezY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bYecb6u32QyVdmEn/TuqovooYrq44AV5SNVKdiUSr3E/pzfUYVtffhwMb4FOe6j70 q6PFDw9sQ77nyeMiF6uby3VhRUksKiMoT5XsX86W1N5QL5rvEAAFCr9cTqxXUOiZM4 54GMfxmqbVW+V1IKiIUanDcVdJoDUJSPO5a/Txi42wRjzKQhAhIoNZxWEoFo7jtK9L zmQgQqeFCYe2yOmiQVHQFxhS0GDD8JVS9tL4nkQQE/Po9HGstXhDPmI2OV5uJ20Q2n N2c/NhjWWY8hy+l1eLFnWzv4ag8cnJMRjWcLbKN5wtUeMieiV7wsjM2LJUh/dkHY8/ OpOMladm7edxg== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:33 +0300 Message-ID: <20230827175449.1766701-8-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 07/23] drm/shmem-helper: Make all exported symbols GPL X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Make all drm-shmem exported symbols GPL to make them consistent with the rest of drm-shmem symbols. Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem_shmem_helper.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index db20b9123891..575704f38808 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -226,7 +226,7 @@ void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem) shmem->pages_mark_accessed_on_put); shmem->pages = NULL; } -EXPORT_SYMBOL(drm_gem_shmem_put_pages); +EXPORT_SYMBOL_GPL(drm_gem_shmem_put_pages); static int drm_gem_shmem_pin_locked(struct drm_gem_shmem_object *shmem) { @@ -271,7 +271,7 @@ int drm_gem_shmem_pin(struct drm_gem_shmem_object *shmem) return ret; } -EXPORT_SYMBOL(drm_gem_shmem_pin); +EXPORT_SYMBOL_GPL(drm_gem_shmem_pin); /** * drm_gem_shmem_unpin - Unpin backing pages for a shmem GEM object @@ -290,7 +290,7 @@ void drm_gem_shmem_unpin(struct drm_gem_shmem_object *shmem) drm_gem_shmem_unpin_locked(shmem); dma_resv_unlock(shmem->base.resv); } -EXPORT_SYMBOL(drm_gem_shmem_unpin); +EXPORT_SYMBOL_GPL(drm_gem_shmem_unpin); /* * drm_gem_shmem_vmap - Create a virtual mapping for a shmem GEM object @@ -360,7 +360,7 @@ int drm_gem_shmem_vmap(struct drm_gem_shmem_object *shmem, return ret; } -EXPORT_SYMBOL(drm_gem_shmem_vmap); +EXPORT_SYMBOL_GPL(drm_gem_shmem_vmap); /* * drm_gem_shmem_vunmap - Unmap a virtual mapping for a shmem GEM object @@ -396,7 +396,7 @@ void drm_gem_shmem_vunmap(struct drm_gem_shmem_object *shmem, shmem->vaddr = NULL; } -EXPORT_SYMBOL(drm_gem_shmem_vunmap); +EXPORT_SYMBOL_GPL(drm_gem_shmem_vunmap); static int drm_gem_shmem_create_with_handle(struct drm_file *file_priv, @@ -435,7 +435,7 @@ int drm_gem_shmem_madvise(struct drm_gem_shmem_object *shmem, int madv) return (madv >= 0); } -EXPORT_SYMBOL(drm_gem_shmem_madvise); +EXPORT_SYMBOL_GPL(drm_gem_shmem_madvise); void drm_gem_shmem_purge(struct drm_gem_shmem_object *shmem) { @@ -467,7 +467,7 @@ void drm_gem_shmem_purge(struct drm_gem_shmem_object *shmem) invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 0, (loff_t)-1); } -EXPORT_SYMBOL(drm_gem_shmem_purge); +EXPORT_SYMBOL_GPL(drm_gem_shmem_purge); /** * drm_gem_shmem_dumb_create - Create a dumb shmem buffer object @@ -636,7 +636,7 @@ void drm_gem_shmem_print_info(const struct drm_gem_shmem_object *shmem, drm_printf_indent(p, indent, "vmap_use_count=%u\n", shmem->vmap_use_count); drm_printf_indent(p, indent, "vaddr=%p\n", shmem->vaddr); } -EXPORT_SYMBOL(drm_gem_shmem_print_info); +EXPORT_SYMBOL_GPL(drm_gem_shmem_print_info); /** * drm_gem_shmem_get_sg_table - Provide a scatter/gather table of pinned From patchwork Sun Aug 27 17:54:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367370 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 230FDC83F10 for ; Sun, 27 Aug 2023 17:56:21 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 81B6210E1DC; Sun, 27 Aug 2023 17:56:09 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id 687EE10E1D4; Sun, 27 Aug 2023 17:56:05 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 913B16607181; Sun, 27 Aug 2023 18:56:02 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158964; bh=ByinIBR6C889Wc7J5QSlS+UZS3TDGPt4wJQxb1KoG58=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RlhxgmgAcy0Ut1eEelzG9PzJCngwjXq+B4SSIC+Kxao5VUoRpcHLM8kxPI2cp5AGn 27m6OgT32qcuONvXZ2Ct6TdyM2ha01rQ7wGSCzw4aHDkMKGLLQ7f5lY5qj8sInRa2U AMgT9++zV7IrqFjUmOTxCKblM/RcKqmotIW+n7wMDbNvJ7mHLpPH4ApeAlwXygnq/d zcSRFOCXHoKIfpW/MYh6N3nYbbdQE2wjjKWyiC86uqHSc+ny8/jfof43WUMKlDUaIV rVwEfLMAIZe583RhFd2td6fGjaC0fY3Hyrs33rtIcrs9aqaGB76PG/Zp3Yc6fJS5jq wsQsSxq3GNc7w== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:34 +0300 Message-ID: <20230827175449.1766701-9-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 08/23] drm/shmem-helper: Refactor locked/unlocked functions X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Add locked and remove unlocked postfixes from drm-shmem function names, making names consistent with the drm/gem core code. Suggested-by: Boris Brezillon Signed-off-by: Dmitry Osipenko Reviewed-by: Boris Brezillon --- drivers/gpu/drm/drm_gem_shmem_helper.c | 64 +++++++++---------- drivers/gpu/drm/lima/lima_gem.c | 8 +-- drivers/gpu/drm/panfrost/panfrost_drv.c | 2 +- drivers/gpu/drm/panfrost/panfrost_gem.c | 6 +- .../gpu/drm/panfrost/panfrost_gem_shrinker.c | 2 +- drivers/gpu/drm/panfrost/panfrost_mmu.c | 2 +- drivers/gpu/drm/v3d/v3d_bo.c | 4 +- drivers/gpu/drm/virtio/virtgpu_object.c | 4 +- include/drm/drm_gem_shmem_helper.h | 36 +++++------ 9 files changed, 64 insertions(+), 64 deletions(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index 575704f38808..f053dc511508 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -43,8 +43,8 @@ static const struct drm_gem_object_funcs drm_gem_shmem_funcs = { .pin = drm_gem_shmem_object_pin, .unpin = drm_gem_shmem_object_unpin, .get_sg_table = drm_gem_shmem_object_get_sg_table, - .vmap = drm_gem_shmem_object_vmap, - .vunmap = drm_gem_shmem_object_vunmap, + .vmap = drm_gem_shmem_object_vmap_locked, + .vunmap = drm_gem_shmem_object_vunmap_locked, .mmap = drm_gem_shmem_object_mmap, .vm_ops = &drm_gem_shmem_vm_ops, }; @@ -153,7 +153,7 @@ void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem) kfree(shmem->sgt); } if (shmem->got_sgt) - drm_gem_shmem_put_pages(shmem); + drm_gem_shmem_put_pages_locked(shmem); drm_WARN_ON(obj->dev, shmem->pages_use_count); @@ -165,7 +165,7 @@ void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem) } EXPORT_SYMBOL_GPL(drm_gem_shmem_free); -static int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem) +static int drm_gem_shmem_get_pages_locked(struct drm_gem_shmem_object *shmem) { struct drm_gem_object *obj = &shmem->base; struct page **pages; @@ -199,12 +199,12 @@ static int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem) } /* - * drm_gem_shmem_put_pages - Decrease use count on the backing pages for a shmem GEM object + * drm_gem_shmem_put_pages_locked - Decrease use count on the backing pages for a shmem GEM object * @shmem: shmem GEM object * * This function decreases the use count and puts the backing pages when use drops to zero. */ -void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem) +void drm_gem_shmem_put_pages_locked(struct drm_gem_shmem_object *shmem) { struct drm_gem_object *obj = &shmem->base; @@ -226,7 +226,7 @@ void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem) shmem->pages_mark_accessed_on_put); shmem->pages = NULL; } -EXPORT_SYMBOL_GPL(drm_gem_shmem_put_pages); +EXPORT_SYMBOL_GPL(drm_gem_shmem_put_pages_locked); static int drm_gem_shmem_pin_locked(struct drm_gem_shmem_object *shmem) { @@ -234,7 +234,7 @@ static int drm_gem_shmem_pin_locked(struct drm_gem_shmem_object *shmem) dma_resv_assert_held(shmem->base.resv); - ret = drm_gem_shmem_get_pages(shmem); + ret = drm_gem_shmem_get_pages_locked(shmem); return ret; } @@ -243,7 +243,7 @@ static void drm_gem_shmem_unpin_locked(struct drm_gem_shmem_object *shmem) { dma_resv_assert_held(shmem->base.resv); - drm_gem_shmem_put_pages(shmem); + drm_gem_shmem_put_pages_locked(shmem); } /** @@ -293,7 +293,7 @@ void drm_gem_shmem_unpin(struct drm_gem_shmem_object *shmem) EXPORT_SYMBOL_GPL(drm_gem_shmem_unpin); /* - * drm_gem_shmem_vmap - Create a virtual mapping for a shmem GEM object + * drm_gem_shmem_vmap_locked - Create a virtual mapping for a shmem GEM object * @shmem: shmem GEM object * @map: Returns the kernel virtual address of the SHMEM GEM object's backing * store. @@ -302,13 +302,13 @@ EXPORT_SYMBOL_GPL(drm_gem_shmem_unpin); * exists for the buffer backing the shmem GEM object. It hides the differences * between dma-buf imported and natively allocated objects. * - * Acquired mappings should be cleaned up by calling drm_gem_shmem_vunmap(). + * Acquired mappings should be cleaned up by calling drm_gem_shmem_vunmap_locked(). * * Returns: * 0 on success or a negative error code on failure. */ -int drm_gem_shmem_vmap(struct drm_gem_shmem_object *shmem, - struct iosys_map *map) +int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, + struct iosys_map *map) { struct drm_gem_object *obj = &shmem->base; int ret = 0; @@ -331,7 +331,7 @@ int drm_gem_shmem_vmap(struct drm_gem_shmem_object *shmem, return 0; } - ret = drm_gem_shmem_get_pages(shmem); + ret = drm_gem_shmem_get_pages_locked(shmem); if (ret) goto err_zero_use; @@ -354,28 +354,28 @@ int drm_gem_shmem_vmap(struct drm_gem_shmem_object *shmem, err_put_pages: if (!obj->import_attach) - drm_gem_shmem_put_pages(shmem); + drm_gem_shmem_put_pages_locked(shmem); err_zero_use: shmem->vmap_use_count = 0; return ret; } -EXPORT_SYMBOL_GPL(drm_gem_shmem_vmap); +EXPORT_SYMBOL_GPL(drm_gem_shmem_vmap_locked); /* - * drm_gem_shmem_vunmap - Unmap a virtual mapping for a shmem GEM object + * drm_gem_shmem_vunmap_locked - Unmap a virtual mapping for a shmem GEM object * @shmem: shmem GEM object * @map: Kernel virtual address where the SHMEM GEM object was mapped * * This function cleans up a kernel virtual address mapping acquired by - * drm_gem_shmem_vmap(). The mapping is only removed when the use count drops to - * zero. + * drm_gem_shmem_vmap_locked(). The mapping is only removed when the use count + * drops to zero. * * This function hides the differences between dma-buf imported and natively * allocated objects. */ -void drm_gem_shmem_vunmap(struct drm_gem_shmem_object *shmem, - struct iosys_map *map) +void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem, + struct iosys_map *map) { struct drm_gem_object *obj = &shmem->base; @@ -391,12 +391,12 @@ void drm_gem_shmem_vunmap(struct drm_gem_shmem_object *shmem, return; vunmap(shmem->vaddr); - drm_gem_shmem_put_pages(shmem); + drm_gem_shmem_put_pages_locked(shmem); } shmem->vaddr = NULL; } -EXPORT_SYMBOL_GPL(drm_gem_shmem_vunmap); +EXPORT_SYMBOL_GPL(drm_gem_shmem_vunmap_locked); static int drm_gem_shmem_create_with_handle(struct drm_file *file_priv, @@ -424,7 +424,7 @@ drm_gem_shmem_create_with_handle(struct drm_file *file_priv, /* Update madvise status, returns true if not purged, else * false or -errno. */ -int drm_gem_shmem_madvise(struct drm_gem_shmem_object *shmem, int madv) +int drm_gem_shmem_madvise_locked(struct drm_gem_shmem_object *shmem, int madv) { dma_resv_assert_held(shmem->base.resv); @@ -435,9 +435,9 @@ int drm_gem_shmem_madvise(struct drm_gem_shmem_object *shmem, int madv) return (madv >= 0); } -EXPORT_SYMBOL_GPL(drm_gem_shmem_madvise); +EXPORT_SYMBOL_GPL(drm_gem_shmem_madvise_locked); -void drm_gem_shmem_purge(struct drm_gem_shmem_object *shmem) +void drm_gem_shmem_purge_locked(struct drm_gem_shmem_object *shmem) { struct drm_gem_object *obj = &shmem->base; struct drm_device *dev = obj->dev; @@ -451,7 +451,7 @@ void drm_gem_shmem_purge(struct drm_gem_shmem_object *shmem) kfree(shmem->sgt); shmem->sgt = NULL; - drm_gem_shmem_put_pages(shmem); + drm_gem_shmem_put_pages_locked(shmem); shmem->madv = -1; @@ -467,7 +467,7 @@ void drm_gem_shmem_purge(struct drm_gem_shmem_object *shmem) invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 0, (loff_t)-1); } -EXPORT_SYMBOL_GPL(drm_gem_shmem_purge); +EXPORT_SYMBOL_GPL(drm_gem_shmem_purge_locked); /** * drm_gem_shmem_dumb_create - Create a dumb shmem buffer object @@ -564,7 +564,7 @@ static void drm_gem_shmem_vm_close(struct vm_area_struct *vma) struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); dma_resv_lock(shmem->base.resv, NULL); - drm_gem_shmem_put_pages(shmem); + drm_gem_shmem_put_pages_locked(shmem); dma_resv_unlock(shmem->base.resv); drm_gem_vm_close(vma); @@ -605,7 +605,7 @@ int drm_gem_shmem_mmap(struct drm_gem_shmem_object *shmem, struct vm_area_struct } dma_resv_lock(shmem->base.resv, NULL); - ret = drm_gem_shmem_get_pages(shmem); + ret = drm_gem_shmem_get_pages_locked(shmem); dma_resv_unlock(shmem->base.resv); if (ret) @@ -673,7 +673,7 @@ static struct sg_table *drm_gem_shmem_get_pages_sgt_locked(struct drm_gem_shmem_ drm_WARN_ON(obj->dev, obj->import_attach); - ret = drm_gem_shmem_get_pages(shmem); + ret = drm_gem_shmem_get_pages_locked(shmem); if (ret) return ERR_PTR(ret); @@ -696,7 +696,7 @@ static struct sg_table *drm_gem_shmem_get_pages_sgt_locked(struct drm_gem_shmem_ sg_free_table(sgt); kfree(sgt); err_put_pages: - drm_gem_shmem_put_pages(shmem); + drm_gem_shmem_put_pages_locked(shmem); return ERR_PTR(ret); } diff --git a/drivers/gpu/drm/lima/lima_gem.c b/drivers/gpu/drm/lima/lima_gem.c index 28602302c281..7d74c71f5558 100644 --- a/drivers/gpu/drm/lima/lima_gem.c +++ b/drivers/gpu/drm/lima/lima_gem.c @@ -181,7 +181,7 @@ static int lima_gem_pin(struct drm_gem_object *obj) if (bo->heap_size) return -EINVAL; - return drm_gem_shmem_pin(&bo->base); + return drm_gem_shmem_object_pin(obj); } static int lima_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map) @@ -191,7 +191,7 @@ static int lima_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map) if (bo->heap_size) return -EINVAL; - return drm_gem_shmem_vmap(&bo->base, map); + return drm_gem_shmem_object_vmap_locked(obj, map); } static int lima_gem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) @@ -201,7 +201,7 @@ static int lima_gem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) if (bo->heap_size) return -EINVAL; - return drm_gem_shmem_mmap(&bo->base, vma); + return drm_gem_shmem_object_mmap(obj, vma); } static const struct drm_gem_object_funcs lima_gem_funcs = { @@ -213,7 +213,7 @@ static const struct drm_gem_object_funcs lima_gem_funcs = { .unpin = drm_gem_shmem_object_unpin, .get_sg_table = drm_gem_shmem_object_get_sg_table, .vmap = lima_gem_vmap, - .vunmap = drm_gem_shmem_object_vunmap, + .vunmap = drm_gem_shmem_object_vunmap_locked, .mmap = lima_gem_mmap, .vm_ops = &drm_gem_shmem_vm_ops, }; diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c index a2ab99698ca8..175443eacead 100644 --- a/drivers/gpu/drm/panfrost/panfrost_drv.c +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c @@ -436,7 +436,7 @@ static int panfrost_ioctl_madvise(struct drm_device *dev, void *data, } } - args->retained = drm_gem_shmem_madvise(&bo->base, args->madv); + args->retained = drm_gem_shmem_madvise_locked(&bo->base, args->madv); if (args->retained) { if (args->madv == PANFROST_MADV_DONTNEED) diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.c b/drivers/gpu/drm/panfrost/panfrost_gem.c index 3c812fbd126f..59c8c73c6a59 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem.c +++ b/drivers/gpu/drm/panfrost/panfrost_gem.c @@ -192,7 +192,7 @@ static int panfrost_gem_pin(struct drm_gem_object *obj) if (bo->is_heap) return -EINVAL; - return drm_gem_shmem_pin(&bo->base); + return drm_gem_shmem_object_pin(obj); } static const struct drm_gem_object_funcs panfrost_gem_funcs = { @@ -203,8 +203,8 @@ static const struct drm_gem_object_funcs panfrost_gem_funcs = { .pin = panfrost_gem_pin, .unpin = drm_gem_shmem_object_unpin, .get_sg_table = drm_gem_shmem_object_get_sg_table, - .vmap = drm_gem_shmem_object_vmap, - .vunmap = drm_gem_shmem_object_vunmap, + .vmap = drm_gem_shmem_object_vmap_locked, + .vunmap = drm_gem_shmem_object_vunmap_locked, .mmap = drm_gem_shmem_object_mmap, .vm_ops = &drm_gem_shmem_vm_ops, }; diff --git a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c index 6a71a2555f85..72193bd734e1 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c +++ b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c @@ -52,7 +52,7 @@ static bool panfrost_gem_purge(struct drm_gem_object *obj) goto unlock_mappings; panfrost_gem_teardown_mappings_locked(bo); - drm_gem_shmem_purge(&bo->base); + drm_gem_shmem_purge_locked(&bo->base); ret = true; dma_resv_unlock(shmem->base.resv); diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c index c0123d09f699..7771769f0ce0 100644 --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c @@ -535,7 +535,7 @@ static int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as, err_map: sg_free_table(sgt); err_pages: - drm_gem_shmem_put_pages(&bo->base); + drm_gem_shmem_put_pages_locked(&bo->base); err_unlock: dma_resv_unlock(obj->resv); err_bo: diff --git a/drivers/gpu/drm/v3d/v3d_bo.c b/drivers/gpu/drm/v3d/v3d_bo.c index 70c1095d6eec..6a0e7b6177d5 100644 --- a/drivers/gpu/drm/v3d/v3d_bo.c +++ b/drivers/gpu/drm/v3d/v3d_bo.c @@ -58,8 +58,8 @@ static const struct drm_gem_object_funcs v3d_gem_funcs = { .pin = drm_gem_shmem_object_pin, .unpin = drm_gem_shmem_object_unpin, .get_sg_table = drm_gem_shmem_object_get_sg_table, - .vmap = drm_gem_shmem_object_vmap, - .vunmap = drm_gem_shmem_object_vunmap, + .vmap = drm_gem_shmem_object_vmap_locked, + .vunmap = drm_gem_shmem_object_vunmap_locked, .mmap = drm_gem_shmem_object_mmap, .vm_ops = &drm_gem_shmem_vm_ops, }; diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c index 343b13428125..97020ed56b81 100644 --- a/drivers/gpu/drm/virtio/virtgpu_object.c +++ b/drivers/gpu/drm/virtio/virtgpu_object.c @@ -106,8 +106,8 @@ static const struct drm_gem_object_funcs virtio_gpu_shmem_funcs = { .pin = drm_gem_shmem_object_pin, .unpin = drm_gem_shmem_object_unpin, .get_sg_table = drm_gem_shmem_object_get_sg_table, - .vmap = drm_gem_shmem_object_vmap, - .vunmap = drm_gem_shmem_object_vunmap, + .vmap = drm_gem_shmem_object_vmap_locked, + .vunmap = drm_gem_shmem_object_vunmap_locked, .mmap = drm_gem_shmem_object_mmap, .vm_ops = &drm_gem_shmem_vm_ops, }; diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h index f87124629bb5..ec2d8b24e3cf 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -113,16 +113,16 @@ struct drm_gem_shmem_object { struct drm_gem_shmem_object *drm_gem_shmem_create(struct drm_device *dev, size_t size); void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem); -void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem); +void drm_gem_shmem_put_pages_locked(struct drm_gem_shmem_object *shmem); int drm_gem_shmem_pin(struct drm_gem_shmem_object *shmem); void drm_gem_shmem_unpin(struct drm_gem_shmem_object *shmem); -int drm_gem_shmem_vmap(struct drm_gem_shmem_object *shmem, - struct iosys_map *map); -void drm_gem_shmem_vunmap(struct drm_gem_shmem_object *shmem, - struct iosys_map *map); +int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, + struct iosys_map *map); +void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem, + struct iosys_map *map); int drm_gem_shmem_mmap(struct drm_gem_shmem_object *shmem, struct vm_area_struct *vma); -int drm_gem_shmem_madvise(struct drm_gem_shmem_object *shmem, int madv); +int drm_gem_shmem_madvise_locked(struct drm_gem_shmem_object *shmem, int madv); static inline bool drm_gem_shmem_is_purgeable(struct drm_gem_shmem_object *shmem) { @@ -131,7 +131,7 @@ static inline bool drm_gem_shmem_is_purgeable(struct drm_gem_shmem_object *shmem !shmem->base.dma_buf && !shmem->base.import_attach; } -void drm_gem_shmem_purge(struct drm_gem_shmem_object *shmem); +void drm_gem_shmem_purge_locked(struct drm_gem_shmem_object *shmem); struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_shmem_object *shmem); struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_shmem_object *shmem); @@ -222,22 +222,22 @@ static inline struct sg_table *drm_gem_shmem_object_get_sg_table(struct drm_gem_ } /* - * drm_gem_shmem_object_vmap - GEM object function for drm_gem_shmem_vmap() + * drm_gem_shmem_object_vmap_locked - GEM object function for drm_gem_shmem_vmap_locked() * @obj: GEM object * @map: Returns the kernel virtual address of the SHMEM GEM object's backing store. * - * This function wraps drm_gem_shmem_vmap(). Drivers that employ the shmem helpers should - * use it as their &drm_gem_object_funcs.vmap handler. + * This function wraps drm_gem_shmem_vmap_locked(). Drivers that employ the shmem + * helpers should use it as their &drm_gem_object_funcs.vmap handler. * * Returns: * 0 on success or a negative error code on failure. */ -static inline int drm_gem_shmem_object_vmap(struct drm_gem_object *obj, - struct iosys_map *map) +static inline int drm_gem_shmem_object_vmap_locked(struct drm_gem_object *obj, + struct iosys_map *map) { struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); - return drm_gem_shmem_vmap(shmem, map); + return drm_gem_shmem_vmap_locked(shmem, map); } /* @@ -245,15 +245,15 @@ static inline int drm_gem_shmem_object_vmap(struct drm_gem_object *obj, * @obj: GEM object * @map: Kernel virtual address where the SHMEM GEM object was mapped * - * This function wraps drm_gem_shmem_vunmap(). Drivers that employ the shmem helpers should - * use it as their &drm_gem_object_funcs.vunmap handler. + * This function wraps drm_gem_shmem_vunmap_locked(). Drivers that employ the shmem + * helpers should use it as their &drm_gem_object_funcs.vunmap handler. */ -static inline void drm_gem_shmem_object_vunmap(struct drm_gem_object *obj, - struct iosys_map *map) +static inline void drm_gem_shmem_object_vunmap_locked(struct drm_gem_object *obj, + struct iosys_map *map) { struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); - drm_gem_shmem_vunmap(shmem, map); + drm_gem_shmem_vunmap_locked(shmem, map); } /** From patchwork Sun Aug 27 17:54:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367366 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 C34D8C83F13 for ; Sun, 27 Aug 2023 17:56:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F3CC710E1D9; Sun, 27 Aug 2023 17:56:08 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id 41E6710E1D3; Sun, 27 Aug 2023 17:56:07 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 63AE066072A3; Sun, 27 Aug 2023 18:56:04 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158966; bh=IHioglZoVI2lSaGDBxw7DExC6Dk22dZyjUg2cFBSctU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eFamxTs00+fhHgADMPppuElhVoFbv5F6c3LIvyb4o7Ov4gD/3n/l/5Pmtr/Zz1rIX UXKwSgoELoOPAAkCFZAXQNgDwHWCOulEONTWddgw3zQKDalR6xF3Opyny6PLwz7Z7y F1VbjLmfz67laqpKTl6cStrGAXYCWpxli1/pngcyCty8/8US5nnZ8FhNueico+CW1L yPDhCOtTnI+V/5ausuQrDCcYwu2HSXVrYOFXgtsUvw8C+vN4agEYOd738ubmSmKlWK aax7TKSi/wh/vXu+U477tV+CZcLjkH1BWZJAO8+XdwX1ynFXO/Epp/GDo9CaDK8zQh Q0o+UuuTJVAXQ== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:35 +0300 Message-ID: <20230827175449.1766701-10-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 09/23] drm/shmem-helper: Remove obsoleted is_iomem test X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Everything that uses the mapped buffer should by agnostic to is_iomem. The only reason for the is_iomem test is that we're setting shmem->vaddr to the returned map->vaddr. Now that the shmem->vaddr code is gone, remove the obsoleted is_iomem test to clean up the code. Suggested-by: Thomas Zimmermann Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem_shmem_helper.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index f053dc511508..d545d3d227d7 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -315,12 +315,6 @@ int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, if (obj->import_attach) { ret = dma_buf_vmap(obj->import_attach->dmabuf, map); - if (!ret) { - if (drm_WARN_ON(obj->dev, map->is_iomem)) { - dma_buf_vunmap(obj->import_attach->dmabuf, map); - return -EIO; - } - } } else { pgprot_t prot = PAGE_KERNEL; From patchwork Sun Aug 27 17:54:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367371 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 656DBC83F18 for ; Sun, 27 Aug 2023 17:56:22 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A958C10E1DB; Sun, 27 Aug 2023 17:56:12 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by gabe.freedesktop.org (Postfix) with ESMTPS id E059C10E1D8; Sun, 27 Aug 2023 17:56:08 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 3CE0D6603102; Sun, 27 Aug 2023 18:56:06 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158967; bh=n0kkcz8juKwSjNPbXLfDiIJlOKY0+tcGaJqGLsx5hTs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Alg5JnsKjDIWjT6Aixw2aHXpBSqCqXy2+Ld4MIuRsWqHHxbUtCVRj7trHoq3wWblp oH8AfzkEZmEx3D+wXq+hXvIVU/qP/i0np8yK4SXRPeoJm7SQR4SnjAachAknuwYMtl s8eMuuR8I89BrP4ims1nhUn1/HcuIv0S+kJRufKPfxth0yN05hTwaIJnF4H5LdmC4f Nc40AnviggFijAcxyRSYhCJG34AhburJoG/83P8gQXTEvyBmoTpxAm8jmEVFJQ5SlV dmQsVfWs/wBLJdmin/+Q2EzhrvS7fYpilIgPK5oMzzGXbLQXkGvNDRdjno+LlEq5Dw /6UsLJdSonicw== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:36 +0300 Message-ID: <20230827175449.1766701-11-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 10/23] locking/refcount, kref: Add kref_put_ww_mutex() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Introduce kref_put_ww_mutex() helper that will handle the wait-wound mutex auto-locking on kref_put(). This helper is wanted by DRM drivers that extensively use dma-reservation locking which in turns uses ww-mutex. Signed-off-by: Dmitry Osipenko --- include/linux/kref.h | 12 ++++++++++++ include/linux/refcount.h | 5 +++++ lib/refcount.c | 34 ++++++++++++++++++++++++++++++++++ 3 files changed, 51 insertions(+) diff --git a/include/linux/kref.h b/include/linux/kref.h index d32e21a2538c..b2d8dc6e9ae0 100644 --- a/include/linux/kref.h +++ b/include/linux/kref.h @@ -90,6 +90,18 @@ static inline int kref_put_lock(struct kref *kref, return 0; } +static inline int kref_put_ww_mutex(struct kref *kref, + void (*release)(struct kref *kref), + struct ww_mutex *lock, + struct ww_acquire_ctx *ctx) +{ + if (refcount_dec_and_ww_mutex_lock(&kref->refcount, lock, ctx)) { + release(kref); + return 1; + } + return 0; +} + /** * kref_get_unless_zero - Increment refcount for object unless it is zero. * @kref: object. diff --git a/include/linux/refcount.h b/include/linux/refcount.h index a62fcca97486..be9ad272bc77 100644 --- a/include/linux/refcount.h +++ b/include/linux/refcount.h @@ -99,6 +99,8 @@ #include struct mutex; +struct ww_mutex; +struct ww_acquire_ctx; /** * typedef refcount_t - variant of atomic_t specialized for reference counts @@ -366,4 +368,7 @@ extern __must_check bool refcount_dec_and_lock(refcount_t *r, spinlock_t *lock) extern __must_check bool refcount_dec_and_lock_irqsave(refcount_t *r, spinlock_t *lock, unsigned long *flags) __cond_acquires(lock); +extern __must_check bool refcount_dec_and_ww_mutex_lock(refcount_t *r, + struct ww_mutex *lock, + struct ww_acquire_ctx *ctx) __cond_acquires(&lock->base); #endif /* _LINUX_REFCOUNT_H */ diff --git a/lib/refcount.c b/lib/refcount.c index a207a8f22b3c..3f6fd0ceed02 100644 --- a/lib/refcount.c +++ b/lib/refcount.c @@ -6,6 +6,7 @@ #include #include #include +#include #include #define REFCOUNT_WARN(str) WARN_ONCE(1, "refcount_t: " str ".\n") @@ -184,3 +185,36 @@ bool refcount_dec_and_lock_irqsave(refcount_t *r, spinlock_t *lock, return true; } EXPORT_SYMBOL(refcount_dec_and_lock_irqsave); + +/** + * refcount_dec_and_ww_mutex_lock - return holding ww-mutex if able to + * decrement refcount to 0 + * @r: the refcount + * @lock: the ww-mutex to be locked + * @ctx: wait-wound context + * + * Similar to atomic_dec_and_lock(), it will WARN on underflow and fail to + * decrement when saturated at REFCOUNT_SATURATED. + * + * Provides release memory ordering, such that prior loads and stores are done + * before, and provides a control dependency such that free() must come after. + * See the comment on top. + * + * Return: true and hold ww-mutex lock if able to decrement refcount to 0, + * false otherwise + */ +bool refcount_dec_and_ww_mutex_lock(refcount_t *r, struct ww_mutex *lock, + struct ww_acquire_ctx *ctx) +{ + if (refcount_dec_not_one(r)) + return false; + + ww_mutex_lock(lock, ctx); + if (!refcount_dec_and_test(r)) { + ww_mutex_unlock(lock); + return false; + } + + return true; +} +EXPORT_SYMBOL(refcount_dec_and_ww_mutex_lock); From patchwork Sun Aug 27 17:54:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367372 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 0A826C83F17 for ; Sun, 27 Aug 2023 17:56:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C473610E1DD; Sun, 27 Aug 2023 17:56:12 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id CBF4910E1D8; Sun, 27 Aug 2023 17:56:10 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 07E93660729C; Sun, 27 Aug 2023 18:56:07 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158969; bh=M5/xgmgYN0s36JVYHmGw/X427TQVf2NMGXsEGCVdXvc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=auSupVBWNLHWAWDVXWjgaW/AZJUx8stY7+syvdibV1xVrcSxOL5j4DHNZBO9JXHKJ iqALbtRa7tjggEC4KHp+M0/5uS+w0FnG1c6zwai1Eois9bFQRHq6ZxJlIz/gEvbwxV xIwLk4Nqs0yutZZ0BVs4gyRz6O2inG8QTQi01tA4D4Ov/q2H1DbjmY32nfDYDEToim yDj3RQSqElgNj+9SRbx0D9FS0IKfT+SoH59si8XXKTmqVo5OrGJenUBhVs7U1EcGZw LI1VPszTF93y5GByRJxiEzLnp6xM/g2rEJb3yLQ1gRu3j41GNIMmRzTLDgnLwBQkFM 9rzLK43Ye7clw== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:37 +0300 Message-ID: <20230827175449.1766701-12-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 11/23] dma-resv: Add kref_put_dma_resv() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Add simple kref_put_dma_resv() helper that wraps around kref_put_ww_mutex() for drivers that needs to lock dma-resv on kref_put(). It's not possible to easily add this helper to kref.h because of the headers inclusion dependency, hence add it to dma-resv.h. Signed-off-by: Dmitry Osipenko --- include/linux/dma-resv.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/linux/dma-resv.h b/include/linux/dma-resv.h index 8d0e34dad446..c5cf302e4194 100644 --- a/include/linux/dma-resv.h +++ b/include/linux/dma-resv.h @@ -41,6 +41,7 @@ #include #include +#include #include #include #include @@ -464,6 +465,14 @@ static inline void dma_resv_unlock(struct dma_resv *obj) ww_mutex_unlock(&obj->lock); } +static inline int kref_put_dma_resv(struct kref *kref, + void (*release)(struct kref *kref), + struct dma_resv *resv, + struct ww_acquire_ctx *ctx) +{ + return kref_put_ww_mutex(kref, release, &resv->lock, ctx); +} + void dma_resv_init(struct dma_resv *obj); void dma_resv_fini(struct dma_resv *obj); int dma_resv_reserve_fences(struct dma_resv *obj, unsigned int num_fences); From patchwork Sun Aug 27 17:54:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367373 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 A2F7BC83F13 for ; Sun, 27 Aug 2023 17:56:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 60B6410E1DE; Sun, 27 Aug 2023 17:56:16 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7CC4C10E1D8; Sun, 27 Aug 2023 17:56:12 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 C9C3066072AA; Sun, 27 Aug 2023 18:56:09 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158971; bh=2p4cHgA5Rx3A3NQCkFX1jrZwlzZfozBw87OZzukNw+A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jftUNFCa8Ei+fwTjpJd10zv1K/ITAyEDxBz4PtwU5RmQz1WqV5Zlmi7lL87/rxTYH ksaywQMhubqu3GmvBESOvFEsAOCvO9gsVSWycZm1F8BDV83hj7trHIncywLjrgL6gT uNZbQM/L/WwghJX3C2sPCJMjFRprEFHUShIfAjLB9laxhngaAShQVV4wt2Vp4nx0CF og+SGzxPDU1U93IsskKI/c4FDwWZ8PHjquX34Z0TTFQQWFWi+CeZKPagI5633k4inw 3ZgJrpgPTMX3LN37qOfYRhdhuK5X0BKMG8EZExSRtCVibamcLTs73+99IYYPC9BJNp 85c5OFX/JD7Cg== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:38 +0300 Message-ID: <20230827175449.1766701-13-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 12/23] drm/shmem-helper: Add and use pages_pin_count X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Add separate pages_pin_count for tracking of whether drm-shmem pages are moveable or not. With the addition of memory shrinker support to drm-shmem, the pages_use_count will no longer determine whether pages are hard-pinned in memory, but whether pages exit and are soft-pinned (and could be swapped out). The pages_pin_count > 1 will hard-pin pages in memory. Suggested-by: Boris Brezillon Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem_shmem_helper.c | 22 +++++++++++++++++----- include/drm/drm_gem_shmem_helper.h | 10 ++++++++++ 2 files changed, 27 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index d545d3d227d7..1a7e5c332fd8 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -234,14 +234,22 @@ static int drm_gem_shmem_pin_locked(struct drm_gem_shmem_object *shmem) dma_resv_assert_held(shmem->base.resv); + if (kref_get_unless_zero(&shmem->pages_pin_count)) + return 0; + ret = drm_gem_shmem_get_pages_locked(shmem); + if (!ret) + kref_init(&shmem->pages_pin_count); return ret; } -static void drm_gem_shmem_unpin_locked(struct drm_gem_shmem_object *shmem) +static void drm_gem_shmem_kref_unpin_pages(struct kref *kref) { - dma_resv_assert_held(shmem->base.resv); + struct drm_gem_shmem_object *shmem; + + shmem = container_of(kref, struct drm_gem_shmem_object, + pages_pin_count); drm_gem_shmem_put_pages_locked(shmem); } @@ -263,6 +271,9 @@ int drm_gem_shmem_pin(struct drm_gem_shmem_object *shmem) drm_WARN_ON(obj->dev, obj->import_attach); + if (kref_get_unless_zero(&shmem->pages_pin_count)) + return 0; + ret = dma_resv_lock_interruptible(shmem->base.resv, NULL); if (ret) return ret; @@ -286,9 +297,10 @@ void drm_gem_shmem_unpin(struct drm_gem_shmem_object *shmem) drm_WARN_ON(obj->dev, obj->import_attach); - dma_resv_lock(shmem->base.resv, NULL); - drm_gem_shmem_unpin_locked(shmem); - dma_resv_unlock(shmem->base.resv); + if (kref_put_dma_resv(&shmem->pages_pin_count, + drm_gem_shmem_kref_unpin_pages, + obj->resv, NULL)) + dma_resv_unlock(obj->resv); } EXPORT_SYMBOL_GPL(drm_gem_shmem_unpin); diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h index ec2d8b24e3cf..afb7cd671e2a 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -39,6 +39,16 @@ struct drm_gem_shmem_object { */ unsigned int pages_use_count; + /** + * @pages_pin_count: + * + * Reference count on the pinned pages table. + * The pages allowed to be evicted and purged by memory + * shrinker only when the count is zero, otherwise pages + * are hard-pinned in memory. + */ + struct kref pages_pin_count; + /** * @madv: State for madvise * From patchwork Sun Aug 27 17:54:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367374 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 445BFC83F11 for ; Sun, 27 Aug 2023 17:56:24 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0237410E1D8; Sun, 27 Aug 2023 17:56:17 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5636810E1D8; Sun, 27 Aug 2023 17:56:14 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 9602766072AC; Sun, 27 Aug 2023 18:56:11 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158973; bh=QUE15l49Vy2Mm2iNdtx68DoK3cUPhFFXaVfUeuwXxjE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IK+L/f4YJfT49LgtwI608Dhd+wPJIBCTmNsceuOKea9Vpb4zkwnYSdhbMt9onTEbH a+Ru9PBapO9uFP4dkAK6pn029m2qMvse+eoKU0PHxrCP5yDCN1/MT2352UvL0gP1u7 0cnlyPhZss7fdMcgFxt3VcqcMM1ClaxArzLb/+vncM+NM0JotORI07RTQBDpoUCWVz Mfm9cM2zAy8dgHBIYoWapBd+j6jyXtiiJTLkxYBFrvD86OAVA46YauYz4YmfHSqgOq ZsfJxKL8Nrg48m6iJfs/6L6ksE6AVQkeDIQIfBw4Rj5oYNO/0/O7RUqLocQ3nN3Bzn MVP1VY9KPrUFw== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:39 +0300 Message-ID: <20230827175449.1766701-14-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 13/23] drm/shmem-helper: Use kref for pages_use_count X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Use atomic kref helper for pages_use_count to optimize pin/unpin functions by skipping reservation locking while GEM's pin refcount > 1. Suggested-by: Boris Brezillon Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem_shmem_helper.c | 48 ++++++++++++++----------- drivers/gpu/drm/lima/lima_gem.c | 2 +- drivers/gpu/drm/panfrost/panfrost_mmu.c | 2 +- include/drm/drm_gem_shmem_helper.h | 2 +- 4 files changed, 30 insertions(+), 24 deletions(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index 1a7e5c332fd8..5a2e37b3e51d 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -155,7 +155,7 @@ void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem) if (shmem->got_sgt) drm_gem_shmem_put_pages_locked(shmem); - drm_WARN_ON(obj->dev, shmem->pages_use_count); + drm_WARN_ON(obj->dev, kref_read(&shmem->pages_use_count)); dma_resv_unlock(shmem->base.resv); } @@ -172,14 +172,13 @@ static int drm_gem_shmem_get_pages_locked(struct drm_gem_shmem_object *shmem) dma_resv_assert_held(shmem->base.resv); - if (shmem->pages_use_count++ > 0) + if (kref_get_unless_zero(&shmem->pages_use_count)) return 0; pages = drm_gem_get_pages(obj); if (IS_ERR(pages)) { drm_dbg_kms(obj->dev, "Failed to get pages (%ld)\n", PTR_ERR(pages)); - shmem->pages_use_count = 0; return PTR_ERR(pages); } @@ -195,26 +194,20 @@ static int drm_gem_shmem_get_pages_locked(struct drm_gem_shmem_object *shmem) shmem->pages = pages; + kref_init(&shmem->pages_use_count); + return 0; } -/* - * drm_gem_shmem_put_pages_locked - Decrease use count on the backing pages for a shmem GEM object - * @shmem: shmem GEM object - * - * This function decreases the use count and puts the backing pages when use drops to zero. - */ -void drm_gem_shmem_put_pages_locked(struct drm_gem_shmem_object *shmem) -{ - struct drm_gem_object *obj = &shmem->base; - - dma_resv_assert_held(shmem->base.resv); - if (drm_WARN_ON_ONCE(obj->dev, !shmem->pages_use_count)) - return; +static void drm_gem_shmem_kref_release_pages(struct kref *kref) +{ + struct drm_gem_shmem_object *shmem; + struct drm_gem_object *obj; - if (--shmem->pages_use_count > 0) - return; + shmem = container_of(kref, struct drm_gem_shmem_object, + pages_use_count); + obj = &shmem->base; #ifdef CONFIG_X86 if (shmem->map_wc) @@ -226,6 +219,19 @@ void drm_gem_shmem_put_pages_locked(struct drm_gem_shmem_object *shmem) shmem->pages_mark_accessed_on_put); shmem->pages = NULL; } + +/* + * drm_gem_shmem_put_pages_locked - Decrease use count on the backing pages for a shmem GEM object + * @shmem: shmem GEM object + * + * This function decreases the use count and puts the backing pages when use drops to zero. + */ +void drm_gem_shmem_put_pages_locked(struct drm_gem_shmem_object *shmem) +{ + dma_resv_assert_held(shmem->base.resv); + + kref_put(&shmem->pages_use_count, drm_gem_shmem_kref_release_pages); +} EXPORT_SYMBOL_GPL(drm_gem_shmem_put_pages_locked); static int drm_gem_shmem_pin_locked(struct drm_gem_shmem_object *shmem) @@ -556,8 +562,8 @@ static void drm_gem_shmem_vm_open(struct vm_area_struct *vma) * mmap'd, vm_open() just grabs an additional reference for the new * mm the vma is getting copied into (ie. on fork()). */ - if (!drm_WARN_ON_ONCE(obj->dev, !shmem->pages_use_count)) - shmem->pages_use_count++; + drm_WARN_ON_ONCE(obj->dev, + !kref_get_unless_zero(&shmem->pages_use_count)); dma_resv_unlock(shmem->base.resv); @@ -638,7 +644,7 @@ void drm_gem_shmem_print_info(const struct drm_gem_shmem_object *shmem, if (shmem->base.import_attach) return; - drm_printf_indent(p, indent, "pages_use_count=%u\n", shmem->pages_use_count); + drm_printf_indent(p, indent, "pages_use_count=%u\n", kref_read(&shmem->pages_use_count)); drm_printf_indent(p, indent, "vmap_use_count=%u\n", shmem->vmap_use_count); drm_printf_indent(p, indent, "vaddr=%p\n", shmem->vaddr); } diff --git a/drivers/gpu/drm/lima/lima_gem.c b/drivers/gpu/drm/lima/lima_gem.c index 7d74c71f5558..a5f015d188cd 100644 --- a/drivers/gpu/drm/lima/lima_gem.c +++ b/drivers/gpu/drm/lima/lima_gem.c @@ -47,7 +47,7 @@ int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm) } bo->base.pages = pages; - bo->base.pages_use_count = 1; + kref_init(&bo->base.pages_use_count); mapping_set_unevictable(mapping); } diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c index 7771769f0ce0..c9ac9d361864 100644 --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c @@ -487,7 +487,7 @@ static int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as, goto err_unlock; } bo->base.pages = pages; - bo->base.pages_use_count = 1; + kref_init(&bo->base.pages_use_count); } else { pages = bo->base.pages; if (pages[page_offset]) { diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h index afb7cd671e2a..a5a3c193cc8f 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -37,7 +37,7 @@ struct drm_gem_shmem_object { * Reference count on the pages table. * The pages are put when the count reaches zero. */ - unsigned int pages_use_count; + struct kref pages_use_count; /** * @pages_pin_count: From patchwork Sun Aug 27 17:54:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367380 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 8D6F6C83F18 for ; Sun, 27 Aug 2023 17:57:02 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5B77710E1FC; Sun, 27 Aug 2023 17:57:01 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1896C10E1D8; Sun, 27 Aug 2023 17:56:16 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 6E5DE6607365; Sun, 27 Aug 2023 18:56:13 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158975; bh=RdboBXyGBrh9C432+mMzN0orerGXkbDg2K/MlizItwI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZbpTgZ1I4DFQocP7yPu4rlmD4C8x2Rid7LuWQWs7LA8KPfHSxjoy7LAvIndsQAKiE 1EDBi7Tiu1BltLtpmueGnk2uMc0t+ml/zC4JtVdskRWCatlh27ZSL6w+GGlbwFW7+v 529BKE3f/+tG7BG/+BRHXLi29WC/2Mfob25B7IjugM2AETUPjGO42KfM2F/ndcSg/B OoL98Jx2xIELSBS/yd02tX58cetRZbsj04/ZrcwuEtWmlWnv9fyqXkD9xMZup/TOfq DcDGOPbZoKRiE/6TK6CKn13K4l5osK+9cEBEX8fr1xSnGuxsPoQAMo9wQ9pWtmfGqs 3LchkWr/D6AVQ== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:40 +0300 Message-ID: <20230827175449.1766701-15-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 14/23] drm/shmem-helper: Add and use lockless drm_gem_shmem_get_pages() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Add lockless drm_gem_shmem_get_pages() helper that skips taking reservation lock if pages_use_count is non-zero, leveraging from atomicity of the kref counter. Make drm_gem_shmem_mmap() to utilize the new helper. Suggested-by: Boris Brezillon Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem_shmem_helper.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index 5a2e37b3e51d..f386289c24fc 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -234,6 +234,20 @@ void drm_gem_shmem_put_pages_locked(struct drm_gem_shmem_object *shmem) } EXPORT_SYMBOL_GPL(drm_gem_shmem_put_pages_locked); +static int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem) +{ + int ret; + + if (kref_get_unless_zero(&shmem->pages_use_count)) + return 0; + + dma_resv_lock(shmem->base.resv, NULL); + ret = drm_gem_shmem_get_pages_locked(shmem); + dma_resv_unlock(shmem->base.resv); + + return ret; +} + static int drm_gem_shmem_pin_locked(struct drm_gem_shmem_object *shmem) { int ret; @@ -616,10 +630,7 @@ int drm_gem_shmem_mmap(struct drm_gem_shmem_object *shmem, struct vm_area_struct return ret; } - dma_resv_lock(shmem->base.resv, NULL); - ret = drm_gem_shmem_get_pages_locked(shmem); - dma_resv_unlock(shmem->base.resv); - + ret = drm_gem_shmem_get_pages(shmem); if (ret) return ret; From patchwork Sun Aug 27 17:54:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367384 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 018E4C83F10 for ; Sun, 27 Aug 2023 17:57:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8BC2010E1F6; Sun, 27 Aug 2023 17:57:11 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id DE13110E1E1; Sun, 27 Aug 2023 17:56:17 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 32F9666072AB; Sun, 27 Aug 2023 18:56:15 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158976; bh=0wj0JyeO44qWBcA4sg0nmCVr80ZlTFnAVv5Kf3lqoeI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UKfcQeB/4VjkWTVNNVWkxdMAN9nNFcM9+M593lK8WR97x6lAhl1QjWlgTtHlJCZEd 9NMnv4Ej90qpq04M8ZxpTrMECAs3q3cbs8bSTDHNeTGROuI4a7kJky5OZ0K3JPU2Ft UcUw0JGYK0dLGDtteRp0dFb0DDpUxdoo6CzblS9zGw6/qFMTj3KTgUzjnT3WRm/fBQ 6hAOD1RUtypVBZ7h1m6pO+NExLX2ZzZ3/plAM/qe5pgkJWS61gnDlZ489lwsVe1qDT u6ufDxFGUALt5WbxwSbkieEzILF/SAjod3Fa56gXyPB3G6XM3O/uuM1DN0ta//WINQ craGeF445CSZw== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:41 +0300 Message-ID: <20230827175449.1766701-16-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 15/23] drm/shmem-helper: Switch drm_gem_shmem_vmap/vunmap to use pin/unpin X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" The vmapped pages shall be pinned in memory and previously get/put_pages() were implicitly hard-pinning/unpinning the pages. This will no longer be the case with addition of memory shrinker because pages_use_count > 0 won't determine anymore whether pages are hard-pinned (they will be soft-pinned), while the new pages_pin_count will do the hard-pinning. Switch the vmap/vunmap() to use pin/unpin() functions in a preparation of addition of the memory shrinker support to drm-shmem. Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem_shmem_helper.c | 13 ++++++++++--- include/drm/drm_gem_shmem_helper.h | 2 +- 2 files changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index f386289c24fc..17a0177acb5d 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -274,6 +274,13 @@ static void drm_gem_shmem_kref_unpin_pages(struct kref *kref) drm_gem_shmem_put_pages_locked(shmem); } +static void drm_gem_shmem_unpin_locked(struct drm_gem_shmem_object *shmem) +{ + dma_resv_assert_held(shmem->base.resv); + + kref_put(&shmem->pages_pin_count, drm_gem_shmem_kref_unpin_pages); +} + /** * drm_gem_shmem_pin - Pin backing pages for a shmem GEM object * @shmem: shmem GEM object @@ -357,7 +364,7 @@ int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, return 0; } - ret = drm_gem_shmem_get_pages_locked(shmem); + ret = drm_gem_shmem_pin_locked(shmem); if (ret) goto err_zero_use; @@ -380,7 +387,7 @@ int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, err_put_pages: if (!obj->import_attach) - drm_gem_shmem_put_pages_locked(shmem); + drm_gem_shmem_unpin_locked(shmem); err_zero_use: shmem->vmap_use_count = 0; @@ -417,7 +424,7 @@ void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem, return; vunmap(shmem->vaddr); - drm_gem_shmem_put_pages_locked(shmem); + drm_gem_shmem_unpin_locked(shmem); } shmem->vaddr = NULL; diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h index a5a3c193cc8f..400ecd63f45f 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -137,7 +137,7 @@ int drm_gem_shmem_madvise_locked(struct drm_gem_shmem_object *shmem, int madv); static inline bool drm_gem_shmem_is_purgeable(struct drm_gem_shmem_object *shmem) { return (shmem->madv > 0) && - !shmem->vmap_use_count && shmem->sgt && + !kref_read(&shmem->pages_pin_count) && shmem->sgt && !shmem->base.dma_buf && !shmem->base.import_attach; } From patchwork Sun Aug 27 17:54:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367375 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 F23F4C83F01 for ; Sun, 27 Aug 2023 17:56:24 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D5C4510E1D7; Sun, 27 Aug 2023 17:56:23 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8271310E1E1; Sun, 27 Aug 2023 17:56:19 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 E0EA16607290; Sun, 27 Aug 2023 18:56:16 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158978; bh=h5zA3QI6jLEZ04+CP8fo0PuRIMQ8t88TtCG2qT9Ffo4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iNSLxgqeiOzrV7VF4qOrkWsdZCcWTuFLRrgcZCerj/ELf3jnTGlBOGcdBAwdbbV4M LxQRiFJDoIik2S5Mg5DeDD8nXez4oPLNRkByEi4uL0mnSyQdkI/7vxizflqS3pLmHP bKatwdAxCtUKg9KKLCt9VSWQJlQwP2is/SdpyYXy8GBAn1IIHXmKLI8EUqtpNnY2dR fLs9waVIfpYJdEm6AwmzeT8k4iBxuw+n6cH+kxkaBuWXvgRTS3RW0hB+Xf4Yc4fTv5 oQpbrMIXU/X7HN1iz+7Rj1arfSLy3/4vXakAAYjguctPqTCOw4KBdnk+gfJ33suU1A pBzCP7to1zYsA== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:42 +0300 Message-ID: <20230827175449.1766701-17-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 16/23] drm/shmem-helper: Use kref for vmap_use_count X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Use kref helper for vmap_use_count to make refcounting consistent with pages_use_count and pages_pin_count that use kref. This will allow to optimize unlocked vmappings by skipping reservation locking if refcnt > 1. Suggested-by: Boris Brezillon Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem_shmem_helper.c | 37 ++++++++++++++------------ include/drm/drm_gem_shmem_helper.h | 2 +- 2 files changed, 21 insertions(+), 18 deletions(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index 17a0177acb5d..d96fee3d6166 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -144,7 +144,7 @@ void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem) } else if (!shmem->imported_sgt) { dma_resv_lock(shmem->base.resv, NULL); - drm_WARN_ON(obj->dev, shmem->vmap_use_count); + drm_WARN_ON(obj->dev, kref_read(&shmem->vmap_use_count)); if (shmem->sgt) { dma_unmap_sgtable(obj->dev->dev, shmem->sgt, @@ -359,23 +359,25 @@ int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, dma_resv_assert_held(shmem->base.resv); - if (shmem->vmap_use_count++ > 0) { + if (kref_get_unless_zero(&shmem->vmap_use_count)) { iosys_map_set_vaddr(map, shmem->vaddr); return 0; } ret = drm_gem_shmem_pin_locked(shmem); if (ret) - goto err_zero_use; + return ret; if (shmem->map_wc) prot = pgprot_writecombine(prot); shmem->vaddr = vmap(shmem->pages, obj->size >> PAGE_SHIFT, VM_MAP, prot); - if (!shmem->vaddr) + if (!shmem->vaddr) { ret = -ENOMEM; - else + } else { iosys_map_set_vaddr(map, shmem->vaddr); + kref_init(&shmem->vmap_use_count); + } } if (ret) { @@ -388,13 +390,22 @@ int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, err_put_pages: if (!obj->import_attach) drm_gem_shmem_unpin_locked(shmem); -err_zero_use: - shmem->vmap_use_count = 0; return ret; } EXPORT_SYMBOL_GPL(drm_gem_shmem_vmap_locked); +static void drm_gem_shmem_kref_vunmap(struct kref *kref) +{ + struct drm_gem_shmem_object *shmem; + + shmem = container_of(kref, struct drm_gem_shmem_object, + vmap_use_count); + + vunmap(shmem->vaddr); + drm_gem_shmem_unpin_locked(shmem); +} + /* * drm_gem_shmem_vunmap_locked - Unmap a virtual mapping for a shmem GEM object * @shmem: shmem GEM object @@ -416,15 +427,7 @@ void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem, dma_buf_vunmap(obj->import_attach->dmabuf, map); } else { dma_resv_assert_held(shmem->base.resv); - - if (drm_WARN_ON_ONCE(obj->dev, !shmem->vmap_use_count)) - return; - - if (--shmem->vmap_use_count > 0) - return; - - vunmap(shmem->vaddr); - drm_gem_shmem_unpin_locked(shmem); + kref_put(&shmem->vmap_use_count, drm_gem_shmem_kref_vunmap); } shmem->vaddr = NULL; @@ -663,7 +666,7 @@ void drm_gem_shmem_print_info(const struct drm_gem_shmem_object *shmem, return; drm_printf_indent(p, indent, "pages_use_count=%u\n", kref_read(&shmem->pages_use_count)); - drm_printf_indent(p, indent, "vmap_use_count=%u\n", shmem->vmap_use_count); + drm_printf_indent(p, indent, "vmap_use_count=%u\n", kref_read(&shmem->vmap_use_count)); drm_printf_indent(p, indent, "vaddr=%p\n", shmem->vaddr); } EXPORT_SYMBOL_GPL(drm_gem_shmem_print_info); diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h index 400ecd63f45f..0e0ccd380f66 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -81,7 +81,7 @@ struct drm_gem_shmem_object { * Reference count on the virtual address. * The address are un-mapped when the count reaches zero. */ - unsigned int vmap_use_count; + struct kref vmap_use_count; /** * @got_sgt: From patchwork Sun Aug 27 17:54:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367379 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 B3412C83F11 for ; Sun, 27 Aug 2023 17:57:00 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id ED6A710E1F7; Sun, 27 Aug 2023 17:56:59 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4E5B410E1E0; Sun, 27 Aug 2023 17:56:21 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 9F72766073A1; Sun, 27 Aug 2023 18:56:18 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158980; bh=VhX33TYAAg+dJ/TxzMS+7aTR0gptdB20NZJfyVWD51s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hfk3k6qXwyky5OMtU3XhLc4eAo4b9Cz+rMN5Iv1Ktx+C/wIdA3tqiNvTZ3QUS7ecD E1NBnx+ZzL/xsp+j608CQaJC7Mk/8cdwCl/9Fw/l+RvbyRmo09gTLPLYE9S19J5Vxa ss0aRcZP7qO4mSzNW4+L+zutl/Rnb0jKYyAlzL00NYRcppPM6ve4mJrEjVqcDWEMb2 OrgfmwaKI/dv/FStX6lbCg0tPB/I33uxG1yx0ojJU4TJpzVotk+H8+8uchB7Hg+aaj nFRXxUvQw8NarUtb/BqH1CDPYPWd2oJ59a4CCewhjusv3S2sII6Zy7mMGkEjgYZ3as qhpMQdGVZhr8w== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:43 +0300 Message-ID: <20230827175449.1766701-18-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 17/23] drm/shmem-helper: Add and use drm_gem_shmem_resv_assert_held() helper X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" In a preparation of adding drm-shmem memory shrinker, move all reservation locking lockdep checks to use new drm_gem_shmem_resv_assert_held() that will resolve spurious lockdep warning about wrong locking order vs fs_reclam code paths during freeing of shmem GEM, where lockdep isn't aware that it's impossible to have locking contention with the fs_reclam at this special time. Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem_shmem_helper.c | 37 +++++++++++++++++--------- 1 file changed, 25 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index d96fee3d6166..ca5da976aafa 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -128,6 +128,23 @@ struct drm_gem_shmem_object *drm_gem_shmem_create(struct drm_device *dev, size_t } EXPORT_SYMBOL_GPL(drm_gem_shmem_create); +static void drm_gem_shmem_resv_assert_held(struct drm_gem_shmem_object *shmem) +{ + /* + * Destroying the object is a special case.. drm_gem_shmem_free() + * calls many things that WARN_ON if the obj lock is not held. But + * acquiring the obj lock in drm_gem_shmem_free() can cause a locking + * order inversion between reservation_ww_class_mutex and fs_reclaim. + * + * This deadlock is not actually possible, because no one should + * be already holding the lock when drm_gem_shmem_free() is called. + * Unfortunately lockdep is not aware of this detail. So when the + * refcount drops to zero, we pretend it is already locked. + */ + if (kref_read(&shmem->base.refcount)) + drm_gem_shmem_resv_assert_held(shmem); +} + /** * drm_gem_shmem_free - Free resources associated with a shmem GEM object * @shmem: shmem GEM object to free @@ -142,8 +159,6 @@ void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem) if (obj->import_attach) { drm_prime_gem_destroy(obj, shmem->sgt); } else if (!shmem->imported_sgt) { - dma_resv_lock(shmem->base.resv, NULL); - drm_WARN_ON(obj->dev, kref_read(&shmem->vmap_use_count)); if (shmem->sgt) { @@ -156,8 +171,6 @@ void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem) drm_gem_shmem_put_pages_locked(shmem); drm_WARN_ON(obj->dev, kref_read(&shmem->pages_use_count)); - - dma_resv_unlock(shmem->base.resv); } drm_gem_object_release(obj); @@ -170,7 +183,7 @@ static int drm_gem_shmem_get_pages_locked(struct drm_gem_shmem_object *shmem) struct drm_gem_object *obj = &shmem->base; struct page **pages; - dma_resv_assert_held(shmem->base.resv); + drm_gem_shmem_resv_assert_held(shmem); if (kref_get_unless_zero(&shmem->pages_use_count)) return 0; @@ -228,7 +241,7 @@ static void drm_gem_shmem_kref_release_pages(struct kref *kref) */ void drm_gem_shmem_put_pages_locked(struct drm_gem_shmem_object *shmem) { - dma_resv_assert_held(shmem->base.resv); + drm_gem_shmem_resv_assert_held(shmem); kref_put(&shmem->pages_use_count, drm_gem_shmem_kref_release_pages); } @@ -252,7 +265,7 @@ static int drm_gem_shmem_pin_locked(struct drm_gem_shmem_object *shmem) { int ret; - dma_resv_assert_held(shmem->base.resv); + drm_gem_shmem_resv_assert_held(shmem); if (kref_get_unless_zero(&shmem->pages_pin_count)) return 0; @@ -276,7 +289,7 @@ static void drm_gem_shmem_kref_unpin_pages(struct kref *kref) static void drm_gem_shmem_unpin_locked(struct drm_gem_shmem_object *shmem) { - dma_resv_assert_held(shmem->base.resv); + drm_gem_shmem_resv_assert_held(shmem); kref_put(&shmem->pages_pin_count, drm_gem_shmem_kref_unpin_pages); } @@ -357,7 +370,7 @@ int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, } else { pgprot_t prot = PAGE_KERNEL; - dma_resv_assert_held(shmem->base.resv); + drm_gem_shmem_resv_assert_held(shmem); if (kref_get_unless_zero(&shmem->vmap_use_count)) { iosys_map_set_vaddr(map, shmem->vaddr); @@ -426,7 +439,7 @@ void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem, if (obj->import_attach) { dma_buf_vunmap(obj->import_attach->dmabuf, map); } else { - dma_resv_assert_held(shmem->base.resv); + drm_gem_shmem_resv_assert_held(shmem); kref_put(&shmem->vmap_use_count, drm_gem_shmem_kref_vunmap); } @@ -462,7 +475,7 @@ drm_gem_shmem_create_with_handle(struct drm_file *file_priv, */ int drm_gem_shmem_madvise_locked(struct drm_gem_shmem_object *shmem, int madv) { - dma_resv_assert_held(shmem->base.resv); + drm_gem_shmem_resv_assert_held(shmem); if (shmem->madv >= 0) shmem->madv = madv; @@ -478,7 +491,7 @@ void drm_gem_shmem_purge_locked(struct drm_gem_shmem_object *shmem) struct drm_gem_object *obj = &shmem->base; struct drm_device *dev = obj->dev; - dma_resv_assert_held(shmem->base.resv); + drm_gem_shmem_resv_assert_held(shmem); drm_WARN_ON(obj->dev, !drm_gem_shmem_is_purgeable(shmem)); From patchwork Sun Aug 27 17:54:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367381 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 0FB50C83F16 for ; Sun, 27 Aug 2023 17:57:02 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5639510E1FA; Sun, 27 Aug 2023 17:57:01 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0D34210E1D7; Sun, 27 Aug 2023 17:56:23 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 6C106660734E; Sun, 27 Aug 2023 18:56:20 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158981; bh=jNt75SK2NXY22MC9RY2wTbfKh/nmjj76JzY0Oye/HxI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OP0DEbZQh4RnW2MKRQZotA+mFs0Wq29unJoZLVHVbgOj8DZEvecFOfOmJV9y6M5uT wo78eJyEamYiXGGDK24E/2etJey9mgNQhM3TuxUUy0s+F2ID/05hjb1bW2eMwM5+WG JFQ9BY3MeJgLxfi65MceXPGBgiByWCL6y0ZCPg24tsTApWP22I7YA+5FF4LMScRs7G l1T+myDzmlk/AmUdeka+2IZbE2mkOVJ3peVt4DxnDY5MrZLYqhXpErhi8xy1fKGygF LA0nljxCbNM9zSe8Mw28qFcqBxCAcPQwLePzHdOGYDX10r18CL03EE9WnD/yW0ZHyM K1h4a55nPlyiQ== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:44 +0300 Message-ID: <20230827175449.1766701-19-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 18/23] drm/shmem-helper: Add memory shrinker X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Introduce common drm-shmem shrinker for DRM drivers. To start using drm-shmem shrinker drivers should do the following: 1. Implement evict() callback of GEM object where driver should check whether object is purgeable or evictable using drm-shmem helpers and perform the shrinking action 2. Initialize drm-shmem internals using drmm_gem_shmem_init(drm_device), which will register drm-shmem shrinker 3. Implement madvise IOCTL that will use drm_gem_shmem_madvise() Signed-off-by: Daniel Almeida Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem_shmem_helper.c | 415 +++++++++++++++++- .../gpu/drm/panfrost/panfrost_gem_shrinker.c | 9 +- include/drm/drm_device.h | 10 +- include/drm/drm_gem_shmem_helper.h | 71 ++- 4 files changed, 474 insertions(+), 31 deletions(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index ca5da976aafa..f0f708e0ff00 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include @@ -88,8 +89,6 @@ __drm_gem_shmem_create(struct drm_device *dev, size_t size, bool private) if (ret) goto err_release; - INIT_LIST_HEAD(&shmem->madv_list); - if (!private) { /* * Our buffers are kept pinned, so allocating them @@ -142,7 +141,42 @@ static void drm_gem_shmem_resv_assert_held(struct drm_gem_shmem_object *shmem) * refcount drops to zero, we pretend it is already locked. */ if (kref_read(&shmem->base.refcount)) - drm_gem_shmem_resv_assert_held(shmem); + dma_resv_assert_held(shmem->base.resv); +} + +static bool drm_gem_shmem_is_evictable(struct drm_gem_shmem_object *shmem) +{ + drm_gem_shmem_resv_assert_held(shmem); + + return (shmem->madv >= 0) && shmem->base.funcs->evict && + kref_read(&shmem->pages_use_count) && + !kref_read(&shmem->pages_pin_count) && + !shmem->base.dma_buf && !shmem->base.import_attach && + shmem->sgt && !shmem->evicted; +} + +static void +drm_gem_shmem_update_pages_state_locked(struct drm_gem_shmem_object *shmem) +{ + struct drm_gem_object *obj = &shmem->base; + struct drm_gem_shmem *shmem_mm = obj->dev->shmem_mm; + struct drm_gem_shmem_shrinker *shmem_shrinker = &shmem_mm->shrinker; + + drm_gem_shmem_resv_assert_held(shmem); + + if (!shmem_shrinker || obj->import_attach) + return; + + if (shmem->madv < 0) + drm_gem_lru_remove(&shmem->base); + else if (drm_gem_shmem_is_evictable(shmem) || drm_gem_shmem_is_purgeable(shmem)) + drm_gem_lru_move_tail(&shmem_shrinker->lru_evictable, &shmem->base); + else if (shmem->evicted) + drm_gem_lru_move_tail(&shmem_shrinker->lru_evicted, &shmem->base); + else if (!shmem->pages) + drm_gem_lru_remove(&shmem->base); + else + drm_gem_lru_move_tail(&shmem_shrinker->lru_pinned, &shmem->base); } /** @@ -159,6 +193,9 @@ void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem) if (obj->import_attach) { drm_prime_gem_destroy(obj, shmem->sgt); } else if (!shmem->imported_sgt) { + /* take out shmem GEM object from the memory shrinker */ + drm_gem_shmem_madvise_locked(shmem, -1); + drm_WARN_ON(obj->dev, kref_read(&shmem->vmap_use_count)); if (shmem->sgt) { @@ -178,15 +215,26 @@ void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem) } EXPORT_SYMBOL_GPL(drm_gem_shmem_free); -static int drm_gem_shmem_get_pages_locked(struct drm_gem_shmem_object *shmem) +static int +drm_gem_shmem_acquire_pages(struct drm_gem_shmem_object *shmem, bool init) { struct drm_gem_object *obj = &shmem->base; struct page **pages; drm_gem_shmem_resv_assert_held(shmem); - if (kref_get_unless_zero(&shmem->pages_use_count)) + if (shmem->madv < 0) { + drm_WARN_ON(obj->dev, shmem->pages); + return -ENOMEM; + } + + if (shmem->pages) { + drm_WARN_ON(obj->dev, !shmem->evicted); return 0; + } + + if (drm_WARN_ON(obj->dev, !(init ^ kref_read(&shmem->pages_use_count)))) + return -EINVAL; pages = drm_gem_get_pages(obj); if (IS_ERR(pages)) { @@ -207,20 +255,20 @@ static int drm_gem_shmem_get_pages_locked(struct drm_gem_shmem_object *shmem) shmem->pages = pages; - kref_init(&shmem->pages_use_count); - return 0; } - -static void drm_gem_shmem_kref_release_pages(struct kref *kref) +static void +drm_gem_shmem_release_pages_locked(struct drm_gem_shmem_object *shmem) { - struct drm_gem_shmem_object *shmem; - struct drm_gem_object *obj; + struct drm_gem_object *obj = &shmem->base; - shmem = container_of(kref, struct drm_gem_shmem_object, - pages_use_count); - obj = &shmem->base; + drm_gem_shmem_resv_assert_held(shmem); + + if (!shmem->pages) { + drm_WARN_ON(obj->dev, !shmem->evicted && shmem->madv >= 0); + return; + } #ifdef CONFIG_X86 if (shmem->map_wc) @@ -233,6 +281,41 @@ static void drm_gem_shmem_kref_release_pages(struct kref *kref) shmem->pages = NULL; } +static void drm_gem_shmem_kref_release_pages(struct kref *kref) +{ + struct drm_gem_shmem_object *shmem; + + shmem = container_of(kref, struct drm_gem_shmem_object, + pages_use_count); + + drm_gem_shmem_release_pages_locked(shmem); + + drm_gem_shmem_update_pages_state_locked(shmem); +} + +static int drm_gem_shmem_get_pages_locked(struct drm_gem_shmem_object *shmem) +{ + int err; + + drm_gem_shmem_resv_assert_held(shmem); + + if (shmem->madv < 0) + return -ENOMEM; + + if (kref_get_unless_zero(&shmem->pages_use_count)) + return 0; + + err = drm_gem_shmem_acquire_pages(shmem, true); + if (err) + return err; + + kref_init(&shmem->pages_use_count); + + drm_gem_shmem_update_pages_state_locked(shmem); + + return 0; +} + /* * drm_gem_shmem_put_pages_locked - Decrease use count on the backing pages for a shmem GEM object * @shmem: shmem GEM object @@ -271,8 +354,15 @@ static int drm_gem_shmem_pin_locked(struct drm_gem_shmem_object *shmem) return 0; ret = drm_gem_shmem_get_pages_locked(shmem); - if (!ret) + if (!ret) { + ret = drm_gem_shmem_swapin_locked(shmem); + if (ret) { + drm_gem_shmem_put_pages_locked(shmem); + return ret; + } + kref_init(&shmem->pages_pin_count); + } return ret; } @@ -482,29 +572,54 @@ int drm_gem_shmem_madvise_locked(struct drm_gem_shmem_object *shmem, int madv) madv = shmem->madv; + drm_gem_shmem_update_pages_state_locked(shmem); + return (madv >= 0); } EXPORT_SYMBOL_GPL(drm_gem_shmem_madvise_locked); -void drm_gem_shmem_purge_locked(struct drm_gem_shmem_object *shmem) +int drm_gem_shmem_madvise(struct drm_gem_shmem_object *shmem, int madv) +{ + struct drm_gem_object *obj = &shmem->base; + int ret; + + ret = dma_resv_lock_interruptible(obj->resv, NULL); + if (ret) + return ret; + + ret = drm_gem_shmem_madvise_locked(shmem, madv); + dma_resv_unlock(obj->resv); + + return ret; +} +EXPORT_SYMBOL_GPL(drm_gem_shmem_madvise); + +static void drm_gem_shmem_unpin_pages_locked(struct drm_gem_shmem_object *shmem) { struct drm_gem_object *obj = &shmem->base; struct drm_device *dev = obj->dev; drm_gem_shmem_resv_assert_held(shmem); - drm_WARN_ON(obj->dev, !drm_gem_shmem_is_purgeable(shmem)); + if (shmem->evicted) + return; dma_unmap_sgtable(dev->dev, shmem->sgt, DMA_BIDIRECTIONAL, 0); + drm_gem_shmem_release_pages_locked(shmem); + drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); + sg_free_table(shmem->sgt); kfree(shmem->sgt); shmem->sgt = NULL; +} - drm_gem_shmem_put_pages_locked(shmem); +void drm_gem_shmem_purge_locked(struct drm_gem_shmem_object *shmem) +{ + struct drm_gem_object *obj = &shmem->base; - shmem->madv = -1; + drm_WARN_ON(obj->dev, !drm_gem_shmem_is_purgeable(shmem)); - drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); + drm_gem_shmem_unpin_pages_locked(shmem); drm_gem_free_mmap_offset(obj); /* Our goal here is to return as much of the memory as @@ -515,9 +630,59 @@ void drm_gem_shmem_purge_locked(struct drm_gem_shmem_object *shmem) shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1); invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 0, (loff_t)-1); + + shmem->madv = -1; + shmem->evicted = false; + drm_gem_shmem_update_pages_state_locked(shmem); } EXPORT_SYMBOL_GPL(drm_gem_shmem_purge_locked); +/** + * drm_gem_shmem_swapin_locked() - Moves shmem GEM back to memory and enables + * hardware access to the memory. + * @shmem: shmem GEM object + * + * This function moves shmem GEM back to memory if it was previously evicted + * by the memory shrinker. The GEM is ready to use on success. + * + * Returns: + * 0 on success or a negative error code on failure. + */ +int drm_gem_shmem_swapin_locked(struct drm_gem_shmem_object *shmem) +{ + struct drm_gem_object *obj = &shmem->base; + struct sg_table *sgt; + int err; + + drm_gem_shmem_resv_assert_held(shmem); + + if (shmem->evicted) { + err = drm_gem_shmem_acquire_pages(shmem, false); + if (err) + return err; + + sgt = drm_gem_shmem_get_sg_table(shmem); + if (IS_ERR(sgt)) + return PTR_ERR(sgt); + + err = dma_map_sgtable(obj->dev->dev, sgt, + DMA_BIDIRECTIONAL, 0); + if (err) { + sg_free_table(sgt); + kfree(sgt); + return err; + } + + shmem->sgt = sgt; + shmem->evicted = false; + + drm_gem_shmem_update_pages_state_locked(shmem); + } + + return 0; +} +EXPORT_SYMBOL_GPL(drm_gem_shmem_swapin_locked); + /** * drm_gem_shmem_dumb_create - Create a dumb shmem buffer object * @file: DRM file structure to create the dumb buffer for @@ -564,22 +729,34 @@ static vm_fault_t drm_gem_shmem_fault(struct vm_fault *vmf) vm_fault_t ret; struct page *page; pgoff_t page_offset; + bool pages_unpinned; + int err; /* We don't use vmf->pgoff since that has the fake offset */ page_offset = (vmf->address - vma->vm_start) >> PAGE_SHIFT; dma_resv_lock(shmem->base.resv, NULL); - if (page_offset >= num_pages || - drm_WARN_ON_ONCE(obj->dev, !shmem->pages) || - shmem->madv < 0) { + /* Sanity-check that we have the pages pointer when it should present */ + pages_unpinned = (shmem->evicted || shmem->madv < 0 || + !kref_read(&shmem->pages_use_count)); + drm_WARN_ON_ONCE(obj->dev, !shmem->pages ^ pages_unpinned); + + if (page_offset >= num_pages || (!shmem->pages && !shmem->evicted)) { ret = VM_FAULT_SIGBUS; } else { + err = drm_gem_shmem_swapin_locked(shmem); + if (err) { + ret = VM_FAULT_OOM; + goto unlock; + } + page = shmem->pages[page_offset]; ret = vmf_insert_pfn(vma, vmf->address, page_to_pfn(page)); } +unlock: dma_resv_unlock(shmem->base.resv); return ret; @@ -602,6 +779,7 @@ static void drm_gem_shmem_vm_open(struct vm_area_struct *vma) drm_WARN_ON_ONCE(obj->dev, !kref_get_unless_zero(&shmem->pages_use_count)); + drm_gem_shmem_update_pages_state_locked(shmem); dma_resv_unlock(shmem->base.resv); drm_gem_vm_open(vma); @@ -680,7 +858,9 @@ void drm_gem_shmem_print_info(const struct drm_gem_shmem_object *shmem, drm_printf_indent(p, indent, "pages_use_count=%u\n", kref_read(&shmem->pages_use_count)); drm_printf_indent(p, indent, "vmap_use_count=%u\n", kref_read(&shmem->vmap_use_count)); + drm_printf_indent(p, indent, "evicted=%d\n", shmem->evicted); drm_printf_indent(p, indent, "vaddr=%p\n", shmem->vaddr); + drm_printf_indent(p, indent, "madv=%d\n", shmem->madv); } EXPORT_SYMBOL_GPL(drm_gem_shmem_print_info); @@ -736,6 +916,8 @@ static struct sg_table *drm_gem_shmem_get_pages_sgt_locked(struct drm_gem_shmem_ shmem->got_sgt = true; shmem->sgt = sgt; + drm_gem_shmem_update_pages_state_locked(shmem); + return sgt; err_free_sgt: @@ -764,8 +946,8 @@ static struct sg_table *drm_gem_shmem_get_pages_sgt_locked(struct drm_gem_shmem_ */ struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_shmem_object *shmem) { - int ret; struct sg_table *sgt; + int ret; ret = dma_resv_lock_interruptible(shmem->base.resv, NULL); if (ret) @@ -813,6 +995,191 @@ drm_gem_shmem_prime_import_sg_table(struct drm_device *dev, } EXPORT_SYMBOL_GPL(drm_gem_shmem_prime_import_sg_table); +static struct drm_gem_shmem_shrinker * +to_drm_gem_shmem_shrinker(struct shrinker *shrinker) +{ + return container_of(shrinker, struct drm_gem_shmem_shrinker, base); +} + +static unsigned long +drm_gem_shmem_shrinker_count_objects(struct shrinker *shrinker, + struct shrink_control *sc) +{ + struct drm_gem_shmem_shrinker *shmem_shrinker = + to_drm_gem_shmem_shrinker(shrinker); + unsigned long count = shmem_shrinker->lru_evictable.count; + + if (count >= SHRINK_EMPTY) + return SHRINK_EMPTY - 1; + + return count ?: SHRINK_EMPTY; +} + +void drm_gem_shmem_evict_locked(struct drm_gem_shmem_object *shmem) +{ + struct drm_gem_object *obj = &shmem->base; + + drm_WARN_ON(obj->dev, !drm_gem_shmem_is_evictable(shmem)); + drm_WARN_ON(obj->dev, shmem->evicted); + + drm_gem_shmem_unpin_pages_locked(shmem); + + shmem->evicted = true; + drm_gem_shmem_update_pages_state_locked(shmem); +} +EXPORT_SYMBOL_GPL(drm_gem_shmem_evict_locked); + +static bool drm_gem_shmem_shrinker_evict_locked(struct drm_gem_object *obj) +{ + struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); + int err; + + if (!drm_gem_shmem_is_evictable(shmem) || + get_nr_swap_pages() < obj->size >> PAGE_SHIFT) + return false; + + err = drm_gem_evict_locked(obj); + if (err) + return false; + + return true; +} + +static bool drm_gem_shmem_shrinker_purge_locked(struct drm_gem_object *obj) +{ + struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); + int err; + + if (!drm_gem_shmem_is_purgeable(shmem)) + return false; + + err = drm_gem_evict_locked(obj); + if (err) + return false; + + return true; +} + +static unsigned long +drm_gem_shmem_shrinker_scan_objects(struct shrinker *shrinker, + struct shrink_control *sc) +{ + struct drm_gem_shmem_shrinker *shmem_shrinker; + unsigned long nr_to_scan = sc->nr_to_scan; + unsigned long remaining = 0; + unsigned long freed = 0; + + shmem_shrinker = to_drm_gem_shmem_shrinker(shrinker); + + /* purge as many objects as we can */ + freed += drm_gem_lru_scan(&shmem_shrinker->lru_evictable, + nr_to_scan, &remaining, + drm_gem_shmem_shrinker_purge_locked); + + /* evict as many objects as we can */ + if (freed < nr_to_scan) + freed += drm_gem_lru_scan(&shmem_shrinker->lru_evictable, + nr_to_scan - freed, &remaining, + drm_gem_shmem_shrinker_evict_locked); + + return (freed > 0 && remaining > 0) ? freed : SHRINK_STOP; +} + +static int drm_gem_shmem_shrinker_init(struct drm_gem_shmem *shmem_mm, + const char *shrinker_name) +{ + struct drm_gem_shmem_shrinker *shmem_shrinker = &shmem_mm->shrinker; + int err; + + shmem_shrinker->base.count_objects = drm_gem_shmem_shrinker_count_objects; + shmem_shrinker->base.scan_objects = drm_gem_shmem_shrinker_scan_objects; + shmem_shrinker->base.seeks = DEFAULT_SEEKS; + + mutex_init(&shmem_shrinker->lock); + drm_gem_lru_init(&shmem_shrinker->lru_evictable, &shmem_shrinker->lock); + drm_gem_lru_init(&shmem_shrinker->lru_evicted, &shmem_shrinker->lock); + drm_gem_lru_init(&shmem_shrinker->lru_pinned, &shmem_shrinker->lock); + + err = register_shrinker(&shmem_shrinker->base, shrinker_name); + if (err) { + mutex_destroy(&shmem_shrinker->lock); + return err; + } + + return 0; +} + +static void drm_gem_shmem_shrinker_release(struct drm_device *dev, + struct drm_gem_shmem *shmem_mm) +{ + struct drm_gem_shmem_shrinker *shmem_shrinker = &shmem_mm->shrinker; + + unregister_shrinker(&shmem_shrinker->base); + drm_WARN_ON(dev, !list_empty(&shmem_shrinker->lru_evictable.list)); + drm_WARN_ON(dev, !list_empty(&shmem_shrinker->lru_evicted.list)); + drm_WARN_ON(dev, !list_empty(&shmem_shrinker->lru_pinned.list)); + mutex_destroy(&shmem_shrinker->lock); +} + +static int drm_gem_shmem_init(struct drm_device *dev) +{ + int err; + + if (drm_WARN_ON(dev, dev->shmem_mm)) + return -EBUSY; + + dev->shmem_mm = kzalloc(sizeof(*dev->shmem_mm), GFP_KERNEL); + if (!dev->shmem_mm) + return -ENOMEM; + + err = drm_gem_shmem_shrinker_init(dev->shmem_mm, dev->unique); + if (err) + goto free_gem_shmem; + + return 0; + +free_gem_shmem: + kfree(dev->shmem_mm); + dev->shmem_mm = NULL; + + return err; +} + +static void drm_gem_shmem_release(struct drm_device *dev, void *ptr) +{ + struct drm_gem_shmem *shmem_mm = dev->shmem_mm; + + drm_gem_shmem_shrinker_release(dev, shmem_mm); + dev->shmem_mm = NULL; + kfree(shmem_mm); +} + +/** + * drmm_gem_shmem_init() - Initialize drm-shmem internals + * @dev: DRM device + * + * Cleanup is automatically managed as part of DRM device releasing. + * Calling this function multiple times will result in a error. + * + * Returns: + * 0 on success or a negative error code on failure. + */ +int drmm_gem_shmem_init(struct drm_device *dev) +{ + int err; + + err = drm_gem_shmem_init(dev); + if (err) + return err; + + err = drmm_add_action_or_reset(dev, drm_gem_shmem_release, NULL); + if (err) + return err; + + return 0; +} +EXPORT_SYMBOL_GPL(drmm_gem_shmem_init); + MODULE_DESCRIPTION("DRM SHMEM memory-management helpers"); MODULE_IMPORT_NS(DMA_BUF); MODULE_LICENSE("GPL v2"); diff --git a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c index 72193bd734e1..eb810403b027 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c +++ b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c @@ -15,6 +15,13 @@ #include "panfrost_gem.h" #include "panfrost_mmu.h" +static bool panfrost_gem_shmem_is_purgeable(struct drm_gem_shmem_object *shmem) +{ + return (shmem->madv > 0) && + !kref_read(&shmem->pages_pin_count) && shmem->sgt && + !shmem->base.dma_buf && !shmem->base.import_attach; +} + static unsigned long panfrost_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) { @@ -27,7 +34,7 @@ panfrost_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc return 0; list_for_each_entry(shmem, &pfdev->shrinker_list, madv_list) { - if (drm_gem_shmem_is_purgeable(shmem)) + if (panfrost_gem_shmem_is_purgeable(shmem)) count += shmem->base.size >> PAGE_SHIFT; } diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h index 7cf4afae2e79..a978f0cb5e84 100644 --- a/include/drm/drm_device.h +++ b/include/drm/drm_device.h @@ -16,6 +16,7 @@ struct drm_vblank_crtc; struct drm_vma_offset_manager; struct drm_vram_mm; struct drm_fb_helper; +struct drm_gem_shmem_shrinker; struct inode; @@ -290,8 +291,13 @@ struct drm_device { /** @vma_offset_manager: GEM information */ struct drm_vma_offset_manager *vma_offset_manager; - /** @vram_mm: VRAM MM memory manager */ - struct drm_vram_mm *vram_mm; + union { + /** @vram_mm: VRAM MM memory manager */ + struct drm_vram_mm *vram_mm; + + /** @shmem_mm: SHMEM GEM memory manager */ + struct drm_gem_shmem *shmem_mm; + }; /** * @switch_power_state: diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h index 0e0ccd380f66..112dbe5208c0 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -6,6 +6,7 @@ #include #include #include +#include #include #include @@ -13,6 +14,7 @@ #include struct dma_buf_attachment; +struct drm_device; struct drm_mode_create_dumb; struct drm_printer; struct sg_table; @@ -53,8 +55,8 @@ struct drm_gem_shmem_object { * @madv: State for madvise * * 0 is active/inuse. + * 1 is not-needed/can-be-purged * A negative value is the object is purged. - * Positive values are driver specific and not used by the helpers. */ int madv; @@ -115,6 +117,12 @@ struct drm_gem_shmem_object { * @map_wc: map object write-combined (instead of using shmem defaults). */ bool map_wc : 1; + + /** + * @evicted: True if shmem pages are evicted by the memory shrinker. + * Used internally by memory shrinker. + */ + bool evicted : 1; }; #define to_drm_gem_shmem_obj(obj) \ @@ -133,14 +141,22 @@ void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem, int drm_gem_shmem_mmap(struct drm_gem_shmem_object *shmem, struct vm_area_struct *vma); int drm_gem_shmem_madvise_locked(struct drm_gem_shmem_object *shmem, int madv); +int drm_gem_shmem_madvise(struct drm_gem_shmem_object *shmem, int madv); static inline bool drm_gem_shmem_is_purgeable(struct drm_gem_shmem_object *shmem) { - return (shmem->madv > 0) && - !kref_read(&shmem->pages_pin_count) && shmem->sgt && - !shmem->base.dma_buf && !shmem->base.import_attach; + dma_resv_assert_held(shmem->base.resv); + + return (shmem->madv > 0) && shmem->base.funcs->evict && + kref_read(&shmem->pages_use_count) && + !kref_read(&shmem->pages_pin_count) && + !shmem->base.dma_buf && !shmem->base.import_attach && + (shmem->sgt || shmem->evicted); } +int drm_gem_shmem_swapin_locked(struct drm_gem_shmem_object *shmem); + +void drm_gem_shmem_evict_locked(struct drm_gem_shmem_object *shmem); void drm_gem_shmem_purge_locked(struct drm_gem_shmem_object *shmem); struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_shmem_object *shmem); @@ -284,6 +300,53 @@ static inline int drm_gem_shmem_object_mmap(struct drm_gem_object *obj, struct v return drm_gem_shmem_mmap(shmem, vma); } +/** + * drm_gem_shmem_object_madvise - unlocked GEM object function for drm_gem_shmem_madvise_locked() + * @obj: GEM object + * @madv: Madvise value + * + * This function wraps drm_gem_shmem_madvise_locked(), providing unlocked variant. + * + * Returns: + * 0 on success or a negative error code on failure. + */ +static inline int drm_gem_shmem_object_madvise(struct drm_gem_object *obj, int madv) +{ + struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); + + return drm_gem_shmem_madvise(shmem, madv); +} + +/** + * struct drm_gem_shmem_shrinker - Memory shrinker of GEM shmem memory manager + */ +struct drm_gem_shmem_shrinker { + /** @base: Shrinker for purging shmem GEM objects */ + struct shrinker base; + + /** @lock: Protects @lru_* */ + struct mutex lock; + + /** @lru_pinned: List of pinned shmem GEM objects */ + struct drm_gem_lru lru_pinned; + + /** @lru_evictable: List of shmem GEM objects to be evicted */ + struct drm_gem_lru lru_evictable; + + /** @lru_evicted: List of evicted shmem GEM objects */ + struct drm_gem_lru lru_evicted; +}; + +/** + * struct drm_gem_shmem - GEM shmem memory manager + */ +struct drm_gem_shmem { + /** @shrinker: GEM shmem shrinker */ + struct drm_gem_shmem_shrinker shrinker; +}; + +int drmm_gem_shmem_init(struct drm_device *dev); + /* * Driver ops */ From patchwork Sun Aug 27 17:54:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367378 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 25463C83F13 for ; Sun, 27 Aug 2023 17:57:01 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5D46810E1F8; Sun, 27 Aug 2023 17:57:00 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id DDE7F10E1E0; Sun, 27 Aug 2023 17:56:24 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 2B7C2660732C; Sun, 27 Aug 2023 18:56:22 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158983; bh=ORmQKCUGsF8kgAPa3hHKOLWJTvNflLrF3tBCEJ4kehU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=H33nsLUwQUH0+9Xfnh5h5huhD0SAGk1CaReMMOHciJYQd4dJYYdbNPjHyA84/8Ibc FHgCTRuodoLINJAB7PiNEQ0d/XsbPw1HY6QnZ+ZswGVZ71WfDmgiAe9yDJDZf6uY9n 3BhxC+io9BBlOTTKUG8qvpfO4uf3vzlywWSG3lsvqbaWXu/zxZjZJP53OnoELMh7km Gs9NxeaAmD6x9bL1C4oNAVYv6fKUnP5SpuFzUwed39F4vz/DiAaJA/dqWxhhgSlcGm I8dYwFmee0SeqzxtXd8i2PPFD/9UAzU/OYt2O6fLt+Qn8g+ssx8ZaSXzACAkFls1RM uHFQ16+B7l4Ng== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:45 +0300 Message-ID: <20230827175449.1766701-20-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 19/23] drm/shmem-helper: Export drm_gem_shmem_get_pages_sgt_locked() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Export drm_gem_shmem_get_pages_sgt_locked() that will be used by virtio-gpu shrinker during GEM swap-in operation done under the held reservation lock. Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem_shmem_helper.c | 3 ++- include/drm/drm_gem_shmem_helper.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index f0f708e0ff00..62958af90383 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -888,7 +888,7 @@ struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_shmem_object *shmem) } EXPORT_SYMBOL_GPL(drm_gem_shmem_get_sg_table); -static struct sg_table *drm_gem_shmem_get_pages_sgt_locked(struct drm_gem_shmem_object *shmem) +struct sg_table *drm_gem_shmem_get_pages_sgt_locked(struct drm_gem_shmem_object *shmem) { struct drm_gem_object *obj = &shmem->base; int ret; @@ -927,6 +927,7 @@ static struct sg_table *drm_gem_shmem_get_pages_sgt_locked(struct drm_gem_shmem_ drm_gem_shmem_put_pages_locked(shmem); return ERR_PTR(ret); } +EXPORT_SYMBOL_GPL(drm_gem_shmem_get_pages_sgt_locked); /** * drm_gem_shmem_get_pages_sgt - Pin pages, dma map them, and return a diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h index 112dbe5208c0..e10ba533f74d 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -161,6 +161,7 @@ void drm_gem_shmem_purge_locked(struct drm_gem_shmem_object *shmem); struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_shmem_object *shmem); struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_shmem_object *shmem); +struct sg_table *drm_gem_shmem_get_pages_sgt_locked(struct drm_gem_shmem_object *shmem); void drm_gem_shmem_print_info(const struct drm_gem_shmem_object *shmem, struct drm_printer *p, unsigned int indent); From patchwork Sun Aug 27 17:54:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367376 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 90D6EC83F10 for ; Sun, 27 Aug 2023 17:56:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3420310E1D3; Sun, 27 Aug 2023 17:56:59 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id E4D6210E1E1; Sun, 27 Aug 2023 17:56:26 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 127E66607383; Sun, 27 Aug 2023 18:56:23 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158985; bh=iD/RGR8vyEtS3p/My8ajCUUp4er25O/60kSxAeFzEeA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BQNUgE+IuOdVGDcx/E8UE81kIHEC/0ZTMdcT48uhszsRe0Z7AlfsI9ZAE+Ohu5Ti1 mBjCKYjFpiYY4GWmE7MApv4RqDplbKFuU1svi47CAjuRciC2vRmi9MIUeDXat4SxAg q3Bra4UmssMzm2JuV9YCD2DRzOWVKDy+qPOSEcOLga1i4WU0h/bhVjRfvBWTI2gX27 z/C99KXG9CCdCpxvPRBo/c2HDqLh+w2ZrOEo5lTN5rnigrKnglAl0shRSCf1fbKL4a hm/hagzPFNbg2chb1SAHzWM/ASYhsIVLHVWVJZ4enpAZSCC63ECE6b1pB57xVjeRxc Lk3GKgXcZOeMQ== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:46 +0300 Message-ID: <20230827175449.1766701-21-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 20/23] drm/virtio: Pin display framebuffer BO X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Prepare to addition of memory shrinker support by pinning display framebuffer BO pages in memory while they are in use by display on host. Shrinker is free to relocate framebuffer BO pages if it doesn't know that pages are in use, thus pin the pages to disallow shrinker to move them. Acked-by: Gerd Hoffmann Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/virtio/virtgpu_drv.h | 2 ++ drivers/gpu/drm/virtio/virtgpu_gem.c | 19 +++++++++++++++++++ drivers/gpu/drm/virtio/virtgpu_plane.c | 17 +++++++++++++++-- 3 files changed, 36 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h index 4126c384286b..5a4b74b7b318 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -313,6 +313,8 @@ void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs); void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev, struct virtio_gpu_object_array *objs); void virtio_gpu_array_put_free_work(struct work_struct *work); +int virtio_gpu_gem_pin(struct virtio_gpu_object *bo); +void virtio_gpu_gem_unpin(struct virtio_gpu_object *bo); /* virtgpu_vq.c */ int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev); diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c index 7db48d17ee3a..625c05d625bf 100644 --- a/drivers/gpu/drm/virtio/virtgpu_gem.c +++ b/drivers/gpu/drm/virtio/virtgpu_gem.c @@ -294,3 +294,22 @@ void virtio_gpu_array_put_free_work(struct work_struct *work) } spin_unlock(&vgdev->obj_free_lock); } + +int virtio_gpu_gem_pin(struct virtio_gpu_object *bo) +{ + int err; + + if (virtio_gpu_is_shmem(bo)) { + err = drm_gem_shmem_pin(&bo->base); + if (err) + return err; + } + + return 0; +} + +void virtio_gpu_gem_unpin(struct virtio_gpu_object *bo) +{ + if (virtio_gpu_is_shmem(bo)) + drm_gem_shmem_unpin(&bo->base); +} diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c b/drivers/gpu/drm/virtio/virtgpu_plane.c index a2e045f3a000..def57b01a826 100644 --- a/drivers/gpu/drm/virtio/virtgpu_plane.c +++ b/drivers/gpu/drm/virtio/virtgpu_plane.c @@ -238,20 +238,28 @@ static int virtio_gpu_plane_prepare_fb(struct drm_plane *plane, struct virtio_gpu_device *vgdev = dev->dev_private; struct virtio_gpu_framebuffer *vgfb; struct virtio_gpu_object *bo; + int err; if (!new_state->fb) return 0; vgfb = to_virtio_gpu_framebuffer(new_state->fb); bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]); - if (!bo || (plane->type == DRM_PLANE_TYPE_PRIMARY && !bo->guest_blob)) + + err = virtio_gpu_gem_pin(bo); + if (err) + return err; + + if (plane->type == DRM_PLANE_TYPE_PRIMARY && !bo->guest_blob) return 0; if (bo->dumb && (plane->state->fb != new_state->fb)) { vgfb->fence = virtio_gpu_fence_alloc(vgdev, vgdev->fence_drv.context, 0); - if (!vgfb->fence) + if (!vgfb->fence) { + virtio_gpu_gem_unpin(bo); return -ENOMEM; + } } return 0; @@ -261,15 +269,20 @@ static void virtio_gpu_plane_cleanup_fb(struct drm_plane *plane, struct drm_plane_state *state) { struct virtio_gpu_framebuffer *vgfb; + struct virtio_gpu_object *bo; if (!state->fb) return; vgfb = to_virtio_gpu_framebuffer(state->fb); + bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]); + if (vgfb->fence) { dma_fence_put(&vgfb->fence->f); vgfb->fence = NULL; } + + virtio_gpu_gem_unpin(bo); } static void virtio_gpu_cursor_plane_update(struct drm_plane *plane, From patchwork Sun Aug 27 17:54:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367377 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 5EC2DC83F01 for ; Sun, 27 Aug 2023 17:57:00 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BF8AE10E1F4; Sun, 27 Aug 2023 17:56:59 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id 97F4910E1E1; Sun, 27 Aug 2023 17:56:28 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 DEA1F6607318; Sun, 27 Aug 2023 18:56:25 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158987; bh=RA+A0kUbp1llMe7XUDKjCL+L8m+dYX+5lkVHEZr8h5w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JpxAMajyS3+RLYyniTlTzHIoN+2YugJY9chGYDTrTlp6TWW7G8uJpoKU4Hir3JfTP 4PNVN27fjefJa7/SME/YtiEVjk9Ig7uYsd4gt3qQp6KxocxRMqEtV0MVHfhsn7e6oB oPxKtn2bAvzXLr0ZKCZqtlUOpK45LrjEQMcrUWOxyO5N6V+tCVd/KO4Opwe975pvgY fBLd8VpxRvTVh+b+1+H4m74JQtOdsoyjv/zx6IGqXLzNadDiSVFhC5muWSlT+RmMgU pYFYwgza2n2ILiIqVFi7UMeDP2G1M1K70N8uLf1kDlzbH1vsA4qDgIouNpbGJ/9FKc 5zlGxLcaUj9wg== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:47 +0300 Message-ID: <20230827175449.1766701-22-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 21/23] drm/virtio: Attach shmem BOs dynamically X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Prepare for addition of memory shrinker support by attaching shmem pages to host dynamically on first use. The attachment vq command wasn't fenced and there was no vq kick made in the BO creation code path, hence the the attachment already was happening dynamically, but implicitly. Making attachment explicitly dynamic will allow to simplify and reuse more code when shrinker will be added. The virtio_gpu_object_shmem_init() now works under held reservation lock, which will be important to have for shrinker. Acked-by: Gerd Hoffmann Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/virtio/virtgpu_drv.h | 7 +++ drivers/gpu/drm/virtio/virtgpu_gem.c | 26 ++++++++ drivers/gpu/drm/virtio/virtgpu_ioctl.c | 32 ++++++---- drivers/gpu/drm/virtio/virtgpu_object.c | 80 ++++++++++++++++++++----- drivers/gpu/drm/virtio/virtgpu_submit.c | 15 ++++- 5 files changed, 132 insertions(+), 28 deletions(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h index 5a4b74b7b318..8c82530eae82 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -89,6 +89,7 @@ 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; @@ -313,6 +314,8 @@ void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs); void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev, struct virtio_gpu_object_array *objs); void virtio_gpu_array_put_free_work(struct work_struct *work); +int virtio_gpu_array_prepare(struct virtio_gpu_device *vgdev, + struct virtio_gpu_object_array *objs); int virtio_gpu_gem_pin(struct virtio_gpu_object *bo); void virtio_gpu_gem_unpin(struct virtio_gpu_object *bo); @@ -458,6 +461,10 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev, bool virtio_gpu_is_shmem(struct virtio_gpu_object *bo); +int virtio_gpu_reattach_shmem_object_locked(struct virtio_gpu_object *bo); + +int virtio_gpu_reattach_shmem_object(struct virtio_gpu_object *bo); + int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev, uint32_t *resid); /* virtgpu_prime.c */ diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c index 625c05d625bf..97e67064c97e 100644 --- a/drivers/gpu/drm/virtio/virtgpu_gem.c +++ b/drivers/gpu/drm/virtio/virtgpu_gem.c @@ -295,6 +295,26 @@ void virtio_gpu_array_put_free_work(struct work_struct *work) spin_unlock(&vgdev->obj_free_lock); } +int virtio_gpu_array_prepare(struct virtio_gpu_device *vgdev, + struct virtio_gpu_object_array *objs) +{ + struct virtio_gpu_object *bo; + int ret = 0; + u32 i; + + for (i = 0; i < objs->nents; i++) { + bo = gem_to_virtio_gpu_obj(objs->objs[i]); + + if (virtio_gpu_is_shmem(bo) && bo->detached) { + ret = virtio_gpu_reattach_shmem_object_locked(bo); + if (ret) + break; + } + } + + return ret; +} + int virtio_gpu_gem_pin(struct virtio_gpu_object *bo) { int err; @@ -303,6 +323,12 @@ int virtio_gpu_gem_pin(struct virtio_gpu_object *bo) err = drm_gem_shmem_pin(&bo->base); if (err) return err; + + err = virtio_gpu_reattach_shmem_object(bo); + if (err) { + drm_gem_shmem_unpin(&bo->base); + return err; + } } return 0; diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c index b24b11f25197..070c29cea26a 100644 --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c @@ -246,6 +246,10 @@ static int virtio_gpu_transfer_from_host_ioctl(struct drm_device *dev, if (ret != 0) goto err_put_free; + ret = virtio_gpu_array_prepare(vgdev, objs); + if (ret) + goto err_unlock; + fence = virtio_gpu_fence_alloc(vgdev, vgdev->fence_drv.context, 0); if (!fence) { ret = -ENOMEM; @@ -288,11 +292,25 @@ static int virtio_gpu_transfer_to_host_ioctl(struct drm_device *dev, void *data, goto err_put_free; } + ret = virtio_gpu_array_lock_resv(objs); + if (ret != 0) + goto err_put_free; + + ret = virtio_gpu_array_prepare(vgdev, objs); + if (ret) + goto err_unlock; + + fence = virtio_gpu_fence_alloc(vgdev, vgdev->fence_drv.context, 0); + if (!fence) { + ret = -ENOMEM; + goto err_unlock; + } + if (!vgdev->has_virgl_3d) { virtio_gpu_cmd_transfer_to_host_2d (vgdev, offset, args->box.w, args->box.h, args->box.x, args->box.y, - objs, NULL); + objs, fence); } else { virtio_gpu_create_context(dev, file); @@ -301,23 +319,13 @@ static int virtio_gpu_transfer_to_host_ioctl(struct drm_device *dev, void *data, goto err_put_free; } - ret = virtio_gpu_array_lock_resv(objs); - if (ret != 0) - goto err_put_free; - - ret = -ENOMEM; - fence = virtio_gpu_fence_alloc(vgdev, vgdev->fence_drv.context, - 0); - if (!fence) - goto err_unlock; - virtio_gpu_cmd_transfer_to_host_3d (vgdev, vfpriv ? vfpriv->ctx_id : 0, offset, args->level, args->stride, args->layer_stride, &args->box, objs, fence); - dma_fence_put(&fence->f); } + dma_fence_put(&fence->f); virtio_gpu_notify(vgdev); return 0; diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c index 97020ed56b81..044b08aa78ac 100644 --- a/drivers/gpu/drm/virtio/virtgpu_object.c +++ b/drivers/gpu/drm/virtio/virtgpu_object.c @@ -142,10 +142,13 @@ static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev, struct sg_table *pages; int si; - pages = drm_gem_shmem_get_pages_sgt(&bo->base); + pages = drm_gem_shmem_get_pages_sgt_locked(&bo->base); if (IS_ERR(pages)) return PTR_ERR(pages); + if (!ents) + return 0; + if (use_dma_api) *nents = pages->nents; else @@ -176,6 +179,40 @@ static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev, return 0; } +int virtio_gpu_reattach_shmem_object_locked(struct virtio_gpu_object *bo) +{ + struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private; + struct virtio_gpu_mem_entry *ents; + unsigned int nents; + int err; + + if (!bo->detached) + return 0; + + err = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents); + if (err) + return err; + + virtio_gpu_object_attach(vgdev, bo, ents, nents); + + bo->detached = false; + + return 0; +} + +int virtio_gpu_reattach_shmem_object(struct virtio_gpu_object *bo) +{ + int ret; + + ret = dma_resv_lock_interruptible(bo->base.base.resv, NULL); + if (ret) + return ret; + ret = virtio_gpu_reattach_shmem_object_locked(bo); + dma_resv_unlock(bo->base.base.resv); + + return ret; +} + int virtio_gpu_object_create(struct virtio_gpu_device *vgdev, struct virtio_gpu_object_params *params, struct virtio_gpu_object **bo_ptr, @@ -202,45 +239,60 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev, bo->dumb = params->dumb; - ret = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents); - if (ret != 0) - goto err_put_id; + if (bo->blob_mem == VIRTGPU_BLOB_MEM_GUEST) + bo->guest_blob = true; if (fence) { ret = -ENOMEM; objs = virtio_gpu_array_alloc(1); if (!objs) - goto err_free_entry; + goto err_put_id; virtio_gpu_array_add_obj(objs, &bo->base.base); ret = virtio_gpu_array_lock_resv(objs); if (ret != 0) goto err_put_objs; + } else { + ret = dma_resv_lock(bo->base.base.resv, NULL); + if (ret) + goto err_put_id; } if (params->blob) { - if (params->blob_mem == VIRTGPU_BLOB_MEM_GUEST) - bo->guest_blob = true; + ret = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents); + if (ret) + goto err_unlock_objs; + } else { + ret = virtio_gpu_object_shmem_init(vgdev, bo, NULL, NULL); + if (ret) + goto err_unlock_objs; + bo->detached = true; + } + + if (params->blob) virtio_gpu_cmd_resource_create_blob(vgdev, bo, params, ents, nents); - } else if (params->virgl) { + else if (params->virgl) virtio_gpu_cmd_resource_create_3d(vgdev, bo, params, objs, fence); - virtio_gpu_object_attach(vgdev, bo, ents, nents); - } else { + else virtio_gpu_cmd_create_resource(vgdev, bo, params, objs, fence); - virtio_gpu_object_attach(vgdev, bo, ents, nents); - } + + if (!fence) + dma_resv_unlock(bo->base.base.resv); *bo_ptr = bo; return 0; +err_unlock_objs: + if (fence) + virtio_gpu_array_unlock_resv(objs); + else + dma_resv_unlock(bo->base.base.resv); err_put_objs: virtio_gpu_array_put_free(objs); -err_free_entry: - kvfree(ents); err_put_id: virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle); err_free_gem: diff --git a/drivers/gpu/drm/virtio/virtgpu_submit.c b/drivers/gpu/drm/virtio/virtgpu_submit.c index 3c00135ead45..94867f485a64 100644 --- a/drivers/gpu/drm/virtio/virtgpu_submit.c +++ b/drivers/gpu/drm/virtio/virtgpu_submit.c @@ -465,8 +465,19 @@ static void virtio_gpu_install_out_fence_fd(struct virtio_gpu_submit *submit) static int virtio_gpu_lock_buflist(struct virtio_gpu_submit *submit) { - if (submit->buflist) - return virtio_gpu_array_lock_resv(submit->buflist); + int err; + + if (submit->buflist) { + err = virtio_gpu_array_lock_resv(submit->buflist); + if (err) + return err; + + err = virtio_gpu_array_prepare(submit->vgdev, submit->buflist); + if (err) { + virtio_gpu_array_unlock_resv(submit->buflist); + return err; + } + } return 0; } From patchwork Sun Aug 27 17:54:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367383 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 2D13BC83F19 for ; Sun, 27 Aug 2023 17:57:03 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6914B10E1FD; Sun, 27 Aug 2023 17:57:02 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6BA9110E1E0; Sun, 27 Aug 2023 17:56:30 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 9953866072E0; Sun, 27 Aug 2023 18:56:27 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158989; bh=a9exc1odr2ZjcAOVqsqj9AwrRzi7iQXeLcKoEkRBekQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Rt0ugOM3yY9K8YcgpAA/1TXi0d0JUi8W9Xj8HarHo58LEJ7M7iR54xiDWNUM17Wg3 8mgoX+NDE68Z+ZWuzXgeFlqhuuZOoGIFpIqViCAHBSj4ASsKccqJZJjdiCibEYcXI4 /bR5AJWnteJO2qWfQLTIbj3Aw0kWT6dtTvAfCAXWd9xLoMMXiNrwxZeFLoDZmStpTj FT+3SFfjm/BmGtRoYevGzBCmvfKyv+HegtewG/hcEYlJA5ppz2N2BlK1XbdXaoyZ+y jbw5BKN/CngK1kompuzsnselBRA2j5xEmc+4cb1KZ1IsNad2MunQ0zU6Ugdi5m5w1l OSke+H5fn/y5A== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:48 +0300 Message-ID: <20230827175449.1766701-23-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 22/23] drm/virtio: Support memory shrinking X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Support generic drm-shmem memory shrinker and add new madvise IOCTL to the VirtIO-GPU driver. BO cache manager of Mesa driver will mark BOs as "don't need" using the new IOCTL to let shrinker purge the marked BOs on OOM, the shrinker will also evict unpurgeable shmem BOs from memory if guest supports SWAP file or partition. Acked-by: Gerd Hoffmann Signed-off-by: Daniel Almeida Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/virtio/virtgpu_drv.h | 13 +++++- drivers/gpu/drm/virtio/virtgpu_gem.c | 35 ++++++++++++++ drivers/gpu/drm/virtio/virtgpu_ioctl.c | 25 ++++++++++ drivers/gpu/drm/virtio/virtgpu_kms.c | 8 ++++ drivers/gpu/drm/virtio/virtgpu_object.c | 61 +++++++++++++++++++++++++ drivers/gpu/drm/virtio/virtgpu_vq.c | 40 ++++++++++++++++ include/uapi/drm/virtgpu_drm.h | 14 ++++++ 7 files changed, 195 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h index 8c82530eae82..a34da2036221 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -278,7 +278,7 @@ struct virtio_gpu_fpriv { }; /* virtgpu_ioctl.c */ -#define DRM_VIRTIO_NUM_IOCTLS 12 +#define DRM_VIRTIO_NUM_IOCTLS 13 extern struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS]; void virtio_gpu_create_context(struct drm_device *dev, struct drm_file *file); @@ -316,6 +316,8 @@ void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev, void virtio_gpu_array_put_free_work(struct work_struct *work); int virtio_gpu_array_prepare(struct virtio_gpu_device *vgdev, struct virtio_gpu_object_array *objs); +int virtio_gpu_gem_host_mem_release(struct virtio_gpu_object *bo); +int virtio_gpu_gem_madvise(struct virtio_gpu_object *obj, int madv); int virtio_gpu_gem_pin(struct virtio_gpu_object *bo); void virtio_gpu_gem_unpin(struct virtio_gpu_object *bo); @@ -329,6 +331,8 @@ void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev, struct virtio_gpu_fence *fence); void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev, struct virtio_gpu_object *bo); +int virtio_gpu_cmd_release_resource(struct virtio_gpu_device *vgdev, + struct virtio_gpu_object *bo); void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev, uint64_t offset, uint32_t width, uint32_t height, @@ -349,6 +353,9 @@ 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_attach_status_page(struct virtio_gpu_device *vgdev); int virtio_gpu_detach_status_page(struct virtio_gpu_device *vgdev); void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev, @@ -499,4 +506,8 @@ void virtio_gpu_vram_unmap_dma_buf(struct device *dev, int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data, struct drm_file *file); +/* virtgpu_gem_shrinker.c */ +int virtio_gpu_gem_shrinker_init(struct virtio_gpu_device *vgdev); +void virtio_gpu_gem_shrinker_fini(struct virtio_gpu_device *vgdev); + #endif diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c index 97e67064c97e..748f7bbb0e6d 100644 --- a/drivers/gpu/drm/virtio/virtgpu_gem.c +++ b/drivers/gpu/drm/virtio/virtgpu_gem.c @@ -147,10 +147,20 @@ void virtio_gpu_gem_object_close(struct drm_gem_object *obj, struct virtio_gpu_device *vgdev = obj->dev->dev_private; struct virtio_gpu_fpriv *vfpriv = file->driver_priv; struct virtio_gpu_object_array *objs; + struct virtio_gpu_object *bo; if (!vgdev->has_virgl_3d) return; + bo = gem_to_virtio_gpu_obj(obj); + + /* + * Purged BO was already detached and released, the resource ID + * is invalid by now. + */ + if (!virtio_gpu_gem_madvise(bo, VIRTGPU_MADV_WILLNEED)) + return; + objs = virtio_gpu_array_alloc(1); if (!objs) return; @@ -315,6 +325,31 @@ int virtio_gpu_array_prepare(struct virtio_gpu_device *vgdev, return ret; } +int virtio_gpu_gem_madvise(struct virtio_gpu_object *bo, int madv) +{ + if (virtio_gpu_is_shmem(bo)) + return drm_gem_shmem_object_madvise(&bo->base.base, madv); + + return 1; +} + +int virtio_gpu_gem_host_mem_release(struct virtio_gpu_object *bo) +{ + struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private; + int err; + + if (bo->created) { + err = virtio_gpu_cmd_release_resource(vgdev, bo); + if (err) + return err; + + virtio_gpu_notify(vgdev); + bo->created = false; + } + + return 0; +} + int virtio_gpu_gem_pin(struct virtio_gpu_object *bo) { int err; diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c index 070c29cea26a..44a99166efdc 100644 --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c @@ -676,6 +676,28 @@ static int virtio_gpu_context_init_ioctl(struct drm_device *dev, return ret; } +static int virtio_gpu_madvise_ioctl(struct drm_device *dev, + void *data, + struct drm_file *file) +{ + struct drm_virtgpu_madvise *args = data; + struct virtio_gpu_object *bo; + struct drm_gem_object *obj; + + if (args->madv > VIRTGPU_MADV_DONTNEED) + return -EOPNOTSUPP; + + obj = drm_gem_object_lookup(file, args->bo_handle); + if (!obj) + return -ENOENT; + + bo = gem_to_virtio_gpu_obj(obj); + args->retained = virtio_gpu_gem_madvise(bo, args->madv); + drm_gem_object_put(obj); + + return 0; +} + struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS] = { DRM_IOCTL_DEF_DRV(VIRTGPU_MAP, virtio_gpu_map_ioctl, DRM_RENDER_ALLOW), @@ -715,4 +737,7 @@ struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS] = { DRM_IOCTL_DEF_DRV(VIRTGPU_CONTEXT_INIT, virtio_gpu_context_init_ioctl, DRM_RENDER_ALLOW), + + DRM_IOCTL_DEF_DRV(VIRTGPU_MADVISE, virtio_gpu_madvise_ioctl, + DRM_RENDER_ALLOW), }; diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c index 5a3b5aaed1f3..43e237082cec 100644 --- a/drivers/gpu/drm/virtio/virtgpu_kms.c +++ b/drivers/gpu/drm/virtio/virtgpu_kms.c @@ -245,6 +245,12 @@ int virtio_gpu_init(struct virtio_device *vdev, struct drm_device *dev) goto err_scanouts; } + ret = drmm_gem_shmem_init(dev); + if (ret) { + DRM_ERROR("shmem init failed\n"); + goto err_modeset; + } + virtio_device_ready(vgdev->vdev); if (num_capsets) @@ -259,6 +265,8 @@ int virtio_gpu_init(struct virtio_device *vdev, struct drm_device *dev) } return 0; +err_modeset: + virtio_gpu_modeset_fini(vgdev); err_scanouts: virtio_gpu_free_vbufs(vgdev); err_vbufs: diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c index 044b08aa78ac..dc4df8f2d89c 100644 --- a/drivers/gpu/drm/virtio/virtgpu_object.c +++ b/drivers/gpu/drm/virtio/virtgpu_object.c @@ -97,6 +97,60 @@ static void virtio_gpu_free_object(struct drm_gem_object *obj) virtio_gpu_cleanup_object(bo); } +static 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 int virtio_gpu_shmem_evict(struct drm_gem_object *obj) +{ + struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj); + int err; + + /* blob is not movable, it's impossible to detach it from host */ + if (bo->blob_mem) + return -EBUSY; + + /* + * At first tell host to stop using guest's memory to ensure that + * host won't touch the released guest's memory once it's gone. + */ + err = virtio_gpu_detach_object_fenced(bo); + if (err) + return err; + + if (drm_gem_shmem_is_purgeable(&bo->base)) { + err = virtio_gpu_gem_host_mem_release(bo); + if (err) + return err; + + drm_gem_shmem_purge_locked(&bo->base); + } else { + bo->base.pages_mark_dirty_on_put = 1; + drm_gem_shmem_evict_locked(&bo->base); + } + + return 0; +} + static const struct drm_gem_object_funcs virtio_gpu_shmem_funcs = { .free = virtio_gpu_free_object, .open = virtio_gpu_gem_object_open, @@ -110,6 +164,7 @@ static const struct drm_gem_object_funcs virtio_gpu_shmem_funcs = { .vunmap = drm_gem_shmem_object_vunmap_locked, .mmap = drm_gem_shmem_object_mmap, .vm_ops = &drm_gem_shmem_vm_ops, + .evict = virtio_gpu_shmem_evict, }; bool virtio_gpu_is_shmem(struct virtio_gpu_object *bo) @@ -189,6 +244,10 @@ int virtio_gpu_reattach_shmem_object_locked(struct virtio_gpu_object *bo) if (!bo->detached) return 0; + err = drm_gem_shmem_swapin_locked(&bo->base); + if (err) + return err; + err = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents); if (err) return err; @@ -238,6 +297,8 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev, goto err_free_gem; bo->dumb = params->dumb; + bo->blob_mem = params->blob_mem; + bo->blob_flags = params->blob_flags; if (bo->blob_mem == VIRTGPU_BLOB_MEM_GUEST) bo->guest_blob = true; diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c index b1a00c0c25a7..14ab470f413a 100644 --- a/drivers/gpu/drm/virtio/virtgpu_vq.c +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c @@ -545,6 +545,21 @@ void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev, virtio_gpu_cleanup_object(bo); } +int virtio_gpu_cmd_release_resource(struct virtio_gpu_device *vgdev, + struct virtio_gpu_object *bo) +{ + struct virtio_gpu_resource_unref *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_UNREF); + cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle); + + return virtio_gpu_queue_ctrl_buffer(vgdev, vbuf); +} + void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev, uint32_t scanout_id, uint32_t resource_id, uint32_t width, uint32_t height, @@ -645,6 +660,23 @@ 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, + u32 resource_id, + struct virtio_gpu_fence *fence) +{ + struct virtio_gpu_resource_attach_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 +1139,14 @@ 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) { diff --git a/include/uapi/drm/virtgpu_drm.h b/include/uapi/drm/virtgpu_drm.h index b1d0e56565bc..4caba71b2740 100644 --- a/include/uapi/drm/virtgpu_drm.h +++ b/include/uapi/drm/virtgpu_drm.h @@ -48,6 +48,7 @@ extern "C" { #define DRM_VIRTGPU_GET_CAPS 0x09 #define DRM_VIRTGPU_RESOURCE_CREATE_BLOB 0x0a #define DRM_VIRTGPU_CONTEXT_INIT 0x0b +#define DRM_VIRTGPU_MADVISE 0x0c #define VIRTGPU_EXECBUF_FENCE_FD_IN 0x01 #define VIRTGPU_EXECBUF_FENCE_FD_OUT 0x02 @@ -211,6 +212,15 @@ struct drm_virtgpu_context_init { __u64 ctx_set_params; }; +#define VIRTGPU_MADV_WILLNEED 0 +#define VIRTGPU_MADV_DONTNEED 1 +struct drm_virtgpu_madvise { + __u32 bo_handle; + __u32 retained; /* out, non-zero if BO can be used */ + __u32 madv; + __u32 pad; +}; + /* * Event code that's given when VIRTGPU_CONTEXT_PARAM_POLL_RINGS_MASK is in * effect. The event size is sizeof(drm_event), since there is no additional @@ -261,6 +271,10 @@ struct drm_virtgpu_context_init { DRM_IOWR(DRM_COMMAND_BASE + DRM_VIRTGPU_CONTEXT_INIT, \ struct drm_virtgpu_context_init) +#define DRM_IOCTL_VIRTGPU_MADVISE \ + DRM_IOWR(DRM_COMMAND_BASE + DRM_VIRTGPU_MADVISE, \ + struct drm_virtgpu_madvise) + #if defined(__cplusplus) } #endif From patchwork Sun Aug 27 17:54:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13367382 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 7265CC83F17 for ; Sun, 27 Aug 2023 17:57:02 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5749710E1FB; Sun, 27 Aug 2023 17:57:01 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3BBA810E1E4; Sun, 27 Aug 2023 17:56:32 +0000 (UTC) Received: from workpc.. (109-252-153-31.dynamic.spd-mgts.ru [109.252.153.31]) (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 686AD6607297; Sun, 27 Aug 2023 18:56:29 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1693158991; bh=DszJGXwKHynZ1/vqDxxYVgeWqLyAdAH1M7V2d+HvxYQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aiKPzqnhWCbN+5JBrKao7DOl1Cavl2k6FwDQbvuLUSWLKdyLoTQytd0bnQGOIheUt 76yy1JcTtcur6z1hBOAZgKfXU9gmQgQVa0n4mCx+KDZrn0qf5jmMbkYVKJAH14z576 MbefKJRGQKCu2li3SRahZg7rPHYviaS8TxGCpbA//k49jNegQXe+D7CBG/DhAsT9gh w8Mm40SLn4Af7I2WaW840ompQhlO0PHJ7d4UMdXXtfhmxSa6ZtDMB9JDrSp7C7zie5 kcHA3sYcGv1uom2OnUyQ6HZ3V/rr2qUvza6NB28Lxdhr7KqWR9Rl2wdOqckFXunQgx mUwwDqBQItF7A== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland Date: Sun, 27 Aug 2023 20:54:49 +0300 Message-ID: <20230827175449.1766701-24-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> References: <20230827175449.1766701-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 23/23] drm/panfrost: Switch to generic memory shrinker X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Replace Panfrost's custom memory shrinker with a common drm-shmem memory shrinker. Tested-by: Steven Price # Firefly-RK3288 Reviewed-by: Steven Price Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/panfrost/Makefile | 1 - drivers/gpu/drm/panfrost/panfrost_device.h | 4 - drivers/gpu/drm/panfrost/panfrost_drv.c | 27 ++-- drivers/gpu/drm/panfrost/panfrost_gem.c | 30 ++-- drivers/gpu/drm/panfrost/panfrost_gem.h | 9 -- .../gpu/drm/panfrost/panfrost_gem_shrinker.c | 129 ------------------ drivers/gpu/drm/panfrost/panfrost_job.c | 18 ++- include/drm/drm_gem_shmem_helper.h | 7 - 8 files changed, 47 insertions(+), 178 deletions(-) delete mode 100644 drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c diff --git a/drivers/gpu/drm/panfrost/Makefile b/drivers/gpu/drm/panfrost/Makefile index 7da2b3f02ed9..11622e22cf15 100644 --- a/drivers/gpu/drm/panfrost/Makefile +++ b/drivers/gpu/drm/panfrost/Makefile @@ -5,7 +5,6 @@ panfrost-y := \ panfrost_device.o \ panfrost_devfreq.o \ panfrost_gem.o \ - panfrost_gem_shrinker.o \ panfrost_gpu.o \ panfrost_job.o \ panfrost_mmu.o \ diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h index b0126b9fbadc..dcc2571c092b 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.h +++ b/drivers/gpu/drm/panfrost/panfrost_device.h @@ -116,10 +116,6 @@ struct panfrost_device { atomic_t pending; } reset; - struct mutex shrinker_lock; - struct list_head shrinker_list; - struct shrinker shrinker; - struct panfrost_devfreq pfdevfreq; }; diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c index 175443eacead..8cf338c2a03b 100644 --- a/drivers/gpu/drm/panfrost/panfrost_drv.c +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c @@ -170,7 +170,6 @@ panfrost_lookup_bos(struct drm_device *dev, break; } - atomic_inc(&bo->gpu_usecount); job->mappings[i] = mapping; } @@ -395,7 +394,6 @@ static int panfrost_ioctl_madvise(struct drm_device *dev, void *data, { struct panfrost_file_priv *priv = file_priv->driver_priv; struct drm_panfrost_madvise *args = data; - struct panfrost_device *pfdev = dev->dev_private; struct drm_gem_object *gem_obj; struct panfrost_gem_object *bo; int ret = 0; @@ -408,11 +406,15 @@ static int panfrost_ioctl_madvise(struct drm_device *dev, void *data, bo = to_panfrost_bo(gem_obj); + if (bo->is_heap) { + args->retained = 1; + goto out_put_object; + } + ret = dma_resv_lock_interruptible(bo->base.base.resv, NULL); if (ret) goto out_put_object; - mutex_lock(&pfdev->shrinker_lock); mutex_lock(&bo->mappings.lock); if (args->madv == PANFROST_MADV_DONTNEED) { struct panfrost_gem_mapping *first; @@ -438,17 +440,8 @@ static int panfrost_ioctl_madvise(struct drm_device *dev, void *data, args->retained = drm_gem_shmem_madvise_locked(&bo->base, args->madv); - if (args->retained) { - if (args->madv == PANFROST_MADV_DONTNEED) - list_move_tail(&bo->base.madv_list, - &pfdev->shrinker_list); - else if (args->madv == PANFROST_MADV_WILLNEED) - list_del_init(&bo->base.madv_list); - } - out_unlock_mappings: mutex_unlock(&bo->mappings.lock); - mutex_unlock(&pfdev->shrinker_lock); dma_resv_unlock(bo->base.base.resv); out_put_object: drm_gem_object_put(gem_obj); @@ -577,9 +570,6 @@ static int panfrost_probe(struct platform_device *pdev) ddev->dev_private = pfdev; pfdev->ddev = ddev; - mutex_init(&pfdev->shrinker_lock); - INIT_LIST_HEAD(&pfdev->shrinker_list); - err = panfrost_device_init(pfdev); if (err) { if (err != -EPROBE_DEFER) @@ -601,10 +591,14 @@ static int panfrost_probe(struct platform_device *pdev) if (err < 0) goto err_out1; - panfrost_gem_shrinker_init(ddev); + err = drmm_gem_shmem_init(ddev); + if (err < 0) + goto err_out2; return 0; +err_out2: + drm_dev_unregister(ddev); err_out1: pm_runtime_disable(pfdev->dev); panfrost_device_fini(pfdev); @@ -620,7 +614,6 @@ static void panfrost_remove(struct platform_device *pdev) struct drm_device *ddev = pfdev->ddev; drm_dev_unregister(ddev); - panfrost_gem_shrinker_cleanup(ddev); pm_runtime_get_sync(pfdev->dev); pm_runtime_disable(pfdev->dev); diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.c b/drivers/gpu/drm/panfrost/panfrost_gem.c index 59c8c73c6a59..00165fca7f3d 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem.c +++ b/drivers/gpu/drm/panfrost/panfrost_gem.c @@ -19,16 +19,6 @@ static void panfrost_gem_free_object(struct drm_gem_object *obj) struct panfrost_gem_object *bo = to_panfrost_bo(obj); struct panfrost_device *pfdev = obj->dev->dev_private; - /* - * Make sure the BO is no longer inserted in the shrinker list before - * taking care of the destruction itself. If we don't do that we have a - * race condition between this function and what's done in - * panfrost_gem_shrinker_scan(). - */ - mutex_lock(&pfdev->shrinker_lock); - list_del_init(&bo->base.madv_list); - mutex_unlock(&pfdev->shrinker_lock); - /* * If we still have mappings attached to the BO, there's a problem in * our refcounting. @@ -195,6 +185,25 @@ static int panfrost_gem_pin(struct drm_gem_object *obj) return drm_gem_shmem_object_pin(obj); } +static int panfrost_shmem_evict(struct drm_gem_object *obj) +{ + struct panfrost_gem_object *bo = to_panfrost_bo(obj); + + if (!drm_gem_shmem_is_purgeable(&bo->base)) + return -EBUSY; + + if (!mutex_trylock(&bo->mappings.lock)) + return -EBUSY; + + panfrost_gem_teardown_mappings_locked(bo); + + drm_gem_shmem_purge_locked(&bo->base); + + mutex_unlock(&bo->mappings.lock); + + return 0; +} + static const struct drm_gem_object_funcs panfrost_gem_funcs = { .free = panfrost_gem_free_object, .open = panfrost_gem_open, @@ -207,6 +216,7 @@ static const struct drm_gem_object_funcs panfrost_gem_funcs = { .vunmap = drm_gem_shmem_object_vunmap_locked, .mmap = drm_gem_shmem_object_mmap, .vm_ops = &drm_gem_shmem_vm_ops, + .evict = panfrost_shmem_evict, }; /** diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.h b/drivers/gpu/drm/panfrost/panfrost_gem.h index ad2877eeeccd..6ad1bcedb932 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem.h +++ b/drivers/gpu/drm/panfrost/panfrost_gem.h @@ -30,12 +30,6 @@ struct panfrost_gem_object { struct mutex lock; } mappings; - /* - * Count the number of jobs referencing this BO so we don't let the - * shrinker reclaim this object prematurely. - */ - atomic_t gpu_usecount; - bool noexec :1; bool is_heap :1; }; @@ -81,7 +75,4 @@ panfrost_gem_mapping_get(struct panfrost_gem_object *bo, void panfrost_gem_mapping_put(struct panfrost_gem_mapping *mapping); void panfrost_gem_teardown_mappings_locked(struct panfrost_gem_object *bo); -void panfrost_gem_shrinker_init(struct drm_device *dev); -void panfrost_gem_shrinker_cleanup(struct drm_device *dev); - #endif /* __PANFROST_GEM_H__ */ diff --git a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c deleted file mode 100644 index eb810403b027..000000000000 --- a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c +++ /dev/null @@ -1,129 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* Copyright (C) 2019 Arm Ltd. - * - * Based on msm_gem_freedreno.c: - * Copyright (C) 2016 Red Hat - * Author: Rob Clark - */ - -#include - -#include -#include - -#include "panfrost_device.h" -#include "panfrost_gem.h" -#include "panfrost_mmu.h" - -static bool panfrost_gem_shmem_is_purgeable(struct drm_gem_shmem_object *shmem) -{ - return (shmem->madv > 0) && - !kref_read(&shmem->pages_pin_count) && shmem->sgt && - !shmem->base.dma_buf && !shmem->base.import_attach; -} - -static unsigned long -panfrost_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) -{ - struct panfrost_device *pfdev = - container_of(shrinker, struct panfrost_device, shrinker); - struct drm_gem_shmem_object *shmem; - unsigned long count = 0; - - if (!mutex_trylock(&pfdev->shrinker_lock)) - return 0; - - list_for_each_entry(shmem, &pfdev->shrinker_list, madv_list) { - if (panfrost_gem_shmem_is_purgeable(shmem)) - count += shmem->base.size >> PAGE_SHIFT; - } - - mutex_unlock(&pfdev->shrinker_lock); - - return count; -} - -static bool panfrost_gem_purge(struct drm_gem_object *obj) -{ - struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); - struct panfrost_gem_object *bo = to_panfrost_bo(obj); - bool ret = false; - - if (atomic_read(&bo->gpu_usecount)) - return false; - - if (!mutex_trylock(&bo->mappings.lock)) - return false; - - if (!dma_resv_trylock(shmem->base.resv)) - goto unlock_mappings; - - panfrost_gem_teardown_mappings_locked(bo); - drm_gem_shmem_purge_locked(&bo->base); - ret = true; - - dma_resv_unlock(shmem->base.resv); - -unlock_mappings: - mutex_unlock(&bo->mappings.lock); - return ret; -} - -static unsigned long -panfrost_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) -{ - struct panfrost_device *pfdev = - container_of(shrinker, struct panfrost_device, shrinker); - struct drm_gem_shmem_object *shmem, *tmp; - unsigned long freed = 0; - - if (!mutex_trylock(&pfdev->shrinker_lock)) - return SHRINK_STOP; - - list_for_each_entry_safe(shmem, tmp, &pfdev->shrinker_list, madv_list) { - if (freed >= sc->nr_to_scan) - break; - if (drm_gem_shmem_is_purgeable(shmem) && - panfrost_gem_purge(&shmem->base)) { - freed += shmem->base.size >> PAGE_SHIFT; - list_del_init(&shmem->madv_list); - } - } - - mutex_unlock(&pfdev->shrinker_lock); - - if (freed > 0) - pr_info_ratelimited("Purging %lu bytes\n", freed << PAGE_SHIFT); - - return freed; -} - -/** - * panfrost_gem_shrinker_init - Initialize panfrost shrinker - * @dev: DRM device - * - * This function registers and sets up the panfrost shrinker. - */ -void panfrost_gem_shrinker_init(struct drm_device *dev) -{ - struct panfrost_device *pfdev = dev->dev_private; - pfdev->shrinker.count_objects = panfrost_gem_shrinker_count; - pfdev->shrinker.scan_objects = panfrost_gem_shrinker_scan; - pfdev->shrinker.seeks = DEFAULT_SEEKS; - WARN_ON(register_shrinker(&pfdev->shrinker, "drm-panfrost")); -} - -/** - * panfrost_gem_shrinker_cleanup - Clean up panfrost shrinker - * @dev: DRM device - * - * This function unregisters the panfrost shrinker. - */ -void panfrost_gem_shrinker_cleanup(struct drm_device *dev) -{ - struct panfrost_device *pfdev = dev->dev_private; - - if (pfdev->shrinker.nr_deferred) { - unregister_shrinker(&pfdev->shrinker); - } -} diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c index dbc597ab46fb..98d9751d2b2c 100644 --- a/drivers/gpu/drm/panfrost/panfrost_job.c +++ b/drivers/gpu/drm/panfrost/panfrost_job.c @@ -272,6 +272,19 @@ static void panfrost_attach_object_fences(struct drm_gem_object **bos, dma_resv_add_fence(bos[i]->resv, fence, DMA_RESV_USAGE_WRITE); } +static int panfrost_objects_prepare(struct drm_gem_object **bos, int bo_count) +{ + struct panfrost_gem_object *bo; + int ret = 0; + + while (!ret && bo_count--) { + bo = to_panfrost_bo(bos[bo_count]); + ret = bo->base.madv ? -ENOMEM : 0; + } + + return ret; +} + int panfrost_job_push(struct panfrost_job *job) { struct panfrost_device *pfdev = job->pfdev; @@ -283,6 +296,10 @@ int panfrost_job_push(struct panfrost_job *job) if (ret) return ret; + ret = panfrost_objects_prepare(job->bos, job->bo_count); + if (ret) + goto unlock; + mutex_lock(&pfdev->sched_lock); drm_sched_job_arm(&job->base); @@ -324,7 +341,6 @@ static void panfrost_job_cleanup(struct kref *ref) if (!job->mappings[i]) break; - atomic_dec(&job->mappings[i]->obj->gpu_usecount); panfrost_gem_mapping_put(job->mappings[i]); } kvfree(job->mappings); diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h index e10ba533f74d..e52921d03c6f 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -60,13 +60,6 @@ struct drm_gem_shmem_object { */ int madv; - /** - * @madv_list: List entry for madvise tracking - * - * Typically used by drivers to track purgeable objects - */ - struct list_head madv_list; - /** * @sgt: Scatter/gather table for imported PRIME buffers */