From patchwork Fri Aug 2 17:29:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 11073995 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5C4AA1399 for ; Fri, 2 Aug 2019 17:30:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 502C228720 for ; Fri, 2 Aug 2019 17:30:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 44401287D1; Fri, 2 Aug 2019 17:30:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B74F228720 for ; Fri, 2 Aug 2019 17:30:00 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 652646EF19; Fri, 2 Aug 2019 17:29:56 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by gabe.freedesktop.org (Postfix) with ESMTPS id B48D06EF24 for ; Fri, 2 Aug 2019 17:29:55 +0000 (UTC) Received: from dude02.hi.pengutronix.de ([2001:67c:670:100:1d::28] helo=dude02.pengutronix.de.) by metis.ext.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1htbNK-0005sQ-17; Fri, 02 Aug 2019 19:29:54 +0200 From: Lucas Stach To: etnaviv@lists.freedesktop.org Subject: [PATCH 3/3] drm/etnaviv: implement softpin Date: Fri, 2 Aug 2019 19:29:53 +0200 Message-Id: <20190802172953.4586-4-l.stach@pengutronix.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190802172953.4586-1-l.stach@pengutronix.de> References: <20190802172953.4586-1-l.stach@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::28 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: dri-devel@lists.freedesktop.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: patchwork-lst@pengutronix.de, kernel@pengutronix.de, dri-devel@lists.freedesktop.org, Russell King Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP With softpin we allow the userspace to take control over the GPU virtual address space. The new capability is relected by a bump of the minor DRM version. There are a few restrictions for userspace to take into account: 1. The kernel reserves a bit of the address space to implement zero page faulting and mapping of the kernel internal ring buffer. Userspace can query the kernel for the first usable GPU VM address via ETNAVIV_PARAM_SOFTPIN_START_ADDR. 2. We only allow softpin on GPUs, which implement proper process separation via PPAS. If softpin is not available the softpin start address will be set to ~0. 3. Softpin is all or nothing. A submit using softpin must not use any address fixups via relocs. Signed-off-by: Lucas Stach Reviewed-by: Philipp Zabel --- drivers/gpu/drm/etnaviv/etnaviv_drv.c | 2 +- drivers/gpu/drm/etnaviv/etnaviv_drv.h | 2 ++ drivers/gpu/drm/etnaviv/etnaviv_gem.c | 4 ++-- drivers/gpu/drm/etnaviv/etnaviv_gem.h | 1 + drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c | 25 +++++++++++++++++++- drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 9 +++++++ include/uapi/drm/etnaviv_drm.h | 5 +++- 7 files changed, 43 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c index 8bcbd3fb02c6..e2e60cdf8741 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c @@ -529,7 +529,7 @@ static struct drm_driver etnaviv_drm_driver = { .desc = "etnaviv DRM", .date = "20151214", .major = 1, - .minor = 2, + .minor = 3, }; /* diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.h b/drivers/gpu/drm/etnaviv/etnaviv_drv.h index a488cfdb6bbf..32cfa5a48d42 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_drv.h +++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.h @@ -24,6 +24,8 @@ struct etnaviv_gem_object; struct etnaviv_gem_submit; struct etnaviv_iommu_global; +#define ETNAVIV_SOFTPIN_START_ADDRESS SZ_4M /* must be >= SUBALLOC_SIZE */ + struct etnaviv_file_private { struct etnaviv_iommu_context *mmu; struct drm_sched_entity sched_entity[ETNA_MAX_PIPES]; diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c index 5dde3e4c3949..dd863bd858f8 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c @@ -248,7 +248,7 @@ void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping) } struct etnaviv_vram_mapping *etnaviv_gem_mapping_get( - struct drm_gem_object *obj, struct etnaviv_iommu_context *mmu) + struct drm_gem_object *obj, struct etnaviv_iommu_context *mmu, u64 va) { struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); struct etnaviv_vram_mapping *mapping; @@ -308,7 +308,7 @@ struct etnaviv_vram_mapping *etnaviv_gem_mapping_get( mapping->use = 1; ret = etnaviv_iommu_map_gem(mmu, etnaviv_obj, mmu->global->memory_base, - mapping, 0); + mapping, va); if (ret < 0) kfree(mapping); else diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.h b/drivers/gpu/drm/etnaviv/etnaviv_gem.h index 92f3090b8348..c64e93a6293b 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gem.h +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.h @@ -77,6 +77,7 @@ static inline bool is_active(struct etnaviv_gem_object *etnaviv_obj) struct etnaviv_gem_submit_bo { u32 flags; + u64 va; struct etnaviv_gem_object *obj; struct etnaviv_vram_mapping *mapping; struct dma_fence *excl; diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c index 627c80ed63d8..09e38f78753c 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c @@ -72,6 +72,14 @@ static int submit_lookup_objects(struct etnaviv_gem_submit *submit, } submit->bos[i].flags = bo->flags; + if (submit->flags & ETNA_SUBMIT_SOFTPIN) { + if (bo->presumed < ETNAVIV_SOFTPIN_START_ADDRESS) { + DRM_ERROR("invalid softpin address\n"); + ret = -EINVAL; + goto out_unlock; + } + submit->bos[i].va = bo->presumed; + } /* normally use drm_gem_object_lookup(), but for bulk lookup * all under single table_lock just hit object_idr directly: @@ -224,11 +232,16 @@ static int submit_pin_objects(struct etnaviv_gem_submit *submit) struct etnaviv_vram_mapping *mapping; mapping = etnaviv_gem_mapping_get(&etnaviv_obj->base, - submit->mmu); + submit->mmu, submit->bos[i].va); if (IS_ERR(mapping)) { ret = PTR_ERR(mapping); break; } + + if ((submit->flags & ETNA_SUBMIT_SOFTPIN) && + submit->bos[i].va != mapping->iova) + return -EINVAL; + atomic_inc(&etnaviv_obj->gpu_active); submit->bos[i].flags |= BO_PINNED; @@ -261,6 +274,10 @@ static int submit_reloc(struct etnaviv_gem_submit *submit, void *stream, u32 *ptr = stream; int ret; + /* Submits using softpin don't blend with relocs */ + if ((submit->flags & ETNA_SUBMIT_SOFTPIN) && nr_relocs != 0) + return -EINVAL; + for (i = 0; i < nr_relocs; i++) { const struct drm_etnaviv_gem_submit_reloc *r = relocs + i; struct etnaviv_gem_submit_bo *bo; @@ -445,6 +462,12 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data, return -EINVAL; } + if ((args->flags & ETNA_SUBMIT_SOFTPIN) && + priv->mmu_global->version != ETNAVIV_IOMMU_V2) { + DRM_ERROR("softpin requested on incompatible MMU\n"); + return -EINVAL; + } + /* * Copy the command submission and bo array to kernel space in * one go, and do this outside of any locks. diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c index a3d0e7adc8bf..696c0f1ec8d7 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -42,6 +42,8 @@ static const struct platform_device_id gpu_ids[] = { int etnaviv_gpu_get_param(struct etnaviv_gpu *gpu, u32 param, u64 *value) { + struct etnaviv_drm_private *priv = gpu->drm->dev_private; + switch (param) { case ETNAVIV_PARAM_GPU_MODEL: *value = gpu->identity.model; @@ -147,6 +149,13 @@ int etnaviv_gpu_get_param(struct etnaviv_gpu *gpu, u32 param, u64 *value) *value = gpu->identity.varyings_count; break; + case ETNAVIV_PARAM_SOFTPIN_START_ADDR: + if (priv->mmu_global->version == ETNAVIV_IOMMU_V2) + *value = ETNAVIV_SOFTPIN_START_ADDRESS; + else + *value = ~0ULL; + break; + default: DBG("%s: invalid param: %u", dev_name(gpu->dev), param); return -EINVAL; diff --git a/include/uapi/drm/etnaviv_drm.h b/include/uapi/drm/etnaviv_drm.h index 0d5c49dc478c..c5710485650c 100644 --- a/include/uapi/drm/etnaviv_drm.h +++ b/include/uapi/drm/etnaviv_drm.h @@ -73,6 +73,7 @@ struct drm_etnaviv_timespec { #define ETNAVIV_PARAM_GPU_INSTRUCTION_COUNT 0x18 #define ETNAVIV_PARAM_GPU_NUM_CONSTANTS 0x19 #define ETNAVIV_PARAM_GPU_NUM_VARYINGS 0x1a +#define ETNAVIV_PARAM_SOFTPIN_START_ADDR 0x1b #define ETNA_MAX_PIPES 4 @@ -177,9 +178,11 @@ struct drm_etnaviv_gem_submit_pmr { #define ETNA_SUBMIT_NO_IMPLICIT 0x0001 #define ETNA_SUBMIT_FENCE_FD_IN 0x0002 #define ETNA_SUBMIT_FENCE_FD_OUT 0x0004 +#define ETNA_SUBMIT_SOFTPIN 0x0008 #define ETNA_SUBMIT_FLAGS (ETNA_SUBMIT_NO_IMPLICIT | \ ETNA_SUBMIT_FENCE_FD_IN | \ - ETNA_SUBMIT_FENCE_FD_OUT) + ETNA_SUBMIT_FENCE_FD_OUT| \ + ETNA_SUBMIT_SOFTPIN) #define ETNA_PIPE_3D 0x00 #define ETNA_PIPE_2D 0x01 #define ETNA_PIPE_VG 0x02