From patchwork Wed Jan 26 13:53:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 537282 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD45FC63686 for ; Wed, 26 Jan 2022 13:54:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235134AbiAZNyz (ORCPT ); Wed, 26 Jan 2022 08:54:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50494 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241804AbiAZNyj (ORCPT ); Wed, 26 Jan 2022 08:54:39 -0500 Received: from mail-wr1-x430.google.com (mail-wr1-x430.google.com [IPv6:2a00:1450:4864:20::430]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 75D1FC06176E for ; Wed, 26 Jan 2022 05:54:38 -0800 (PST) Received: by mail-wr1-x430.google.com with SMTP id s18so25905145wrv.7 for ; Wed, 26 Jan 2022 05:54:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=BKsf6dGO619i7ojy2wbleRyI3TRP+wgyPNagaXmtvTU=; b=c7yiZrG4/TyIvSNHYNZnb10q3lmZMebSVvAJlr3i5scF1Hj/EfHqt/z/P5a4ROFfKD X/HgALPBPiHcpqCGJO/MOhRCv+Pu6OyK1llbwcHnJHvHvgjLdP77TacG714tWZNxz4ox KEUsg396RWk1eZ+xniAh2m4X2ctOJb/cFnJ1HZ6HmJcz+8IMJrWfeydYDfoM8KYuy3aV y9VXFq0SDfmhdClORdVj6TNW/8YiUyTBR8XD5VTfyerOBtTWBoM0wPmfOju4u/nNWCY8 jth/Ripzl5I52L6jb9Kh8aAVS+xJ5PIGg9AstgepmSP7RH8aI9TXJHqFxNEVqyeW5l5r w+lw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=BKsf6dGO619i7ojy2wbleRyI3TRP+wgyPNagaXmtvTU=; b=oH3SGE9QhV/VhD4f+h3ZdF8gznrd86PB5oSDvj/Ge+eEb9tFpZQkU6slqRPetYH8Or /a/rMxdcrjd2NZsJN9SVQnvsuAwnHSNkX4idVt55M/17ZYRws1VrnrK9jaN57mv8S8/n swOSNNCo5NGLXfB3iEtqKYX99HpXKKB87lvSFIc+SKvvT45X/+d4YBG698zpl/OtNAJ3 c6G3yURcp0neDGuPQK+Cu50M7H88gRu26CmGw/2xq2+MoxCBO6fa06Q5vPNv9DWsi9yv 0E23UH36TjkYKoj+Q1i6do2h7G4DSBFKGsJXvghFnfYkQLrtuh+w5dp4cb9UYBMGgU4O K2dA== X-Gm-Message-State: AOAM5301++Q+QTRirrsx6RUFhQ3xW3VPTwjfhAbgc0gFiGByqX2GRZLi 0MS1IiYwyogN1AfMRdKNO49aRQ== X-Google-Smtp-Source: ABdhPJzeRGH+zsgttK1iV0aSGOWXWhbvvWfYyqpBupgxLD/fRvNMwITNpQYK76Ot2fpf1trlYB0Vnw== X-Received: by 2002:adf:f7cd:: with SMTP id a13mr7502095wrq.517.1643205277045; Wed, 26 Jan 2022 05:54:37 -0800 (PST) Received: from srini-hackbox.lan (cpc90716-aztw32-2-0-cust825.18-1.cable.virginm.net. [86.26.103.58]) by smtp.gmail.com with ESMTPSA id n15sm3356593wmr.26.2022.01.26.05.54.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Jan 2022 05:54:36 -0800 (PST) From: Srinivas Kandagatla To: robh+dt@kernel.org, gregkh@linuxfoundation.org Cc: devicetree@vger.kernel.org, ekangupt@qti.qualcomm.com, bkumar@qti.qualcomm.com, linux-kernel@vger.kernel.org, srini@kernel.org, bjorn.andersson@linaro.org, linux-arm-msm@vger.kernel.org, Vamsi Krishna Gattupalli , Srinivas Kandagatla Subject: [PATCH v3 10/12] misc: fastrpc: Add fdlist implementation Date: Wed, 26 Jan 2022 13:53:02 +0000 Message-Id: <20220126135304.16340-11-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20220126135304.16340-1-srinivas.kandagatla@linaro.org> References: <20220126135304.16340-1-srinivas.kandagatla@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Vamsi Krishna Gattupalli Add fdlist implementation to support dma handles. fdlist is populated by DSP if any map is no longer used and it is freed during put_args. Signed-off-by: Vamsi Krishna Gattupalli Signed-off-by: Srinivas Kandagatla --- drivers/misc/fastrpc.c | 36 ++++++++++++++++++++++++++++++++---- 1 file changed, 32 insertions(+), 4 deletions(-) diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 1c1815bed2c2..6052a9cb9e2c 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -319,7 +319,8 @@ static void fastrpc_map_get(struct fastrpc_map *map) kref_get(&map->refcount); } -static int fastrpc_map_find(struct fastrpc_user *fl, int fd, + +static int fastrpc_map_lookup(struct fastrpc_user *fl, int fd, struct fastrpc_map **ppmap) { struct fastrpc_map *map = NULL; @@ -327,7 +328,6 @@ static int fastrpc_map_find(struct fastrpc_user *fl, int fd, mutex_lock(&fl->mutex); list_for_each_entry(map, &fl->maps, node) { if (map->fd == fd) { - fastrpc_map_get(map); *ppmap = map; mutex_unlock(&fl->mutex); return 0; @@ -338,6 +338,17 @@ static int fastrpc_map_find(struct fastrpc_user *fl, int fd, return -ENOENT; } +static int fastrpc_map_find(struct fastrpc_user *fl, int fd, + struct fastrpc_map **ppmap) +{ + int ret = fastrpc_map_lookup(fl, fd, ppmap); + + if (!ret) + fastrpc_map_get(*ppmap); + + return ret; +} + static void fastrpc_buf_free(struct fastrpc_buf *buf) { dma_free_coherent(buf->dev, buf->size, buf->virt, @@ -410,7 +421,7 @@ static void fastrpc_context_free(struct kref *ref) ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); cctx = ctx->cctx; - for (i = 0; i < ctx->nscalars; i++) + for (i = 0; i < ctx->nbufs; i++) fastrpc_map_put(ctx->maps[i]); if (ctx->buf) @@ -968,9 +979,19 @@ static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, u32 kernel) { struct fastrpc_remote_arg *rpra = ctx->rpra; - int i, inbufs; + struct fastrpc_user *fl = ctx->fl; + struct fastrpc_map *mmap = NULL; + struct fastrpc_invoke_buf *list; + struct fastrpc_phy_page *pages; + u64 *fdlist; + int i, inbufs, outbufs, handles; inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); + outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc); + handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc); + list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); + pages = fastrpc_phy_page_start(list, ctx->nscalars); + fdlist = (uint64_t *)(pages + inbufs + outbufs + handles); for (i = inbufs; i < ctx->nbufs; ++i) { if (!ctx->maps[i]) { @@ -987,6 +1008,13 @@ static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, } } + for (i = 0; i < FASTRPC_MAX_FDLIST; i++) { + if (!fdlist[i]) + break; + if (!fastrpc_map_lookup(fl, (int)fdlist[i], &mmap)) + fastrpc_map_put(mmap); + } + return 0; }