From patchwork Wed Nov 2 22:11:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Elder X-Patchwork-Id: 13029071 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 7C9BFC43217 for ; Wed, 2 Nov 2022 22:12:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231497AbiKBWMB (ORCPT ); Wed, 2 Nov 2022 18:12:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58918 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231514AbiKBWL4 (ORCPT ); Wed, 2 Nov 2022 18:11:56 -0400 Received: from mail-il1-x136.google.com (mail-il1-x136.google.com [IPv6:2607:f8b0:4864:20::136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AF761BCB7 for ; Wed, 2 Nov 2022 15:11:51 -0700 (PDT) Received: by mail-il1-x136.google.com with SMTP id g13so205680ile.0 for ; Wed, 02 Nov 2022 15:11:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=awvIszSlBYbQTFNtVRRr363ktjZrC0gWJbbrDOYC/aw=; b=lebLyog2wztMpEEot55TP04NnKX9SjVNcWNDniFxJiAhXNDUBG7PZtVGfrjk778O8X xJOVjjZ72UBD6RXLHTBI2wD/A4CDaEH/TaGFrmBvlaNVB99bUcU/5kmDICdH3kI9P3jj C81M2wiDcc4ScK75rxHEGG7nk+Aw44LWcjC7PmdL1Wi4e5Px8siVV1FxytzI4/Ac+d5L psS0FXtpoSSYingR6m+H5itkBrsTHOVjXYYyLpnAc2b+4E2am8mcfkCkiiYcwnYC2HSd P5edIo/IpJpOPq7nhlXIjBIFr5HkF2gDPEdizYYQSg3HkEPlzbXeVKJZHdZuLw7U0KPS OOZA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=awvIszSlBYbQTFNtVRRr363ktjZrC0gWJbbrDOYC/aw=; b=7+BGBau9b1fuZk1xoJkKIxlwCn+s3D9tkmrYNmASCE0IyJjbgCS7bKu6RmQAYeuBAq lB5NzMkVW/rLn4p/1xrTxBiYBXltrMLqNF72/6jCvJkBSNZ7iwX/90m2G6gJSB5x0qt7 zUqLOcr4zTAkQ3+rtCnlHXagJ+7Y7ixKJ/dt4bXkRHsQnOOsT2ChAr956DAqs6MaYrsp c42rtDaPXSmrAbuWWDoa3WmwsaC4iVDkvMcnWUHsKx/lNqq8hOuTW1QLY96NoFg4/dtr GmAzL/btY/KwMa4gg32hO5bSJ55lKGfWDYogu9grU+YqVRe5+S6PDKerd4KJbLiwtxRv v1Ag== X-Gm-Message-State: ACrzQf3tLUnZky+MVu0WV1bjusA/49+mN+Q7HVQNHe5GnHGZYxGoICtf mes4zeIz03nDfgXLFBrYZtCSNg== X-Google-Smtp-Source: AMsMyM4Z3094/M2GJ8V7ebv6UBJRpF/VBtgWWeNwfEpC15G2vSCq7cMYjjUoq+lmDuIVgi+t+RlX9g== X-Received: by 2002:a05:6e02:d04:b0:300:8716:e7b1 with SMTP id g4-20020a056e020d0400b003008716e7b1mr16448650ilj.231.1667427110619; Wed, 02 Nov 2022 15:11:50 -0700 (PDT) Received: from presto.localdomain ([98.61.227.136]) by smtp.gmail.com with ESMTPSA id f8-20020a02a108000000b0037465a1dd3fsm5073974jag.156.2022.11.02.15.11.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Nov 2022 15:11:50 -0700 (PDT) From: Alex Elder To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: mka@chromium.org, evgreen@chromium.org, andersson@kernel.org, quic_cpratapa@quicinc.com, quic_avuyyuru@quicinc.com, quic_jponduru@quicinc.com, quic_subashab@quicinc.com, elder@kernel.org, netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v2 6/9] net: ipa: use a bitmap for available endpoints Date: Wed, 2 Nov 2022 17:11:36 -0500 Message-Id: <20221102221139.1091510-7-elder@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221102221139.1091510-1-elder@linaro.org> References: <20221102221139.1091510-1-elder@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Similar to the previous patch, replace the 32-bit unsigned used to track endpoints supported by hardware with a Linux bitmap, to allow an arbitrary number of endpoints to be represented. Move ipa_endpoint_deconfig() above ipa_endpoint_config() and use it in the error path of the latter function. Signed-off-by: Alex Elder --- v2: - Use ipa_endpoint_deconfig() in ipa_endpoint_config() cleanup drivers/net/ipa/ipa.h | 8 ++++-- drivers/net/ipa/ipa_endpoint.c | 49 ++++++++++++++++++++++----------- drivers/net/ipa/ipa_interrupt.c | 8 ++++-- 3 files changed, 43 insertions(+), 22 deletions(-) diff --git a/drivers/net/ipa/ipa.h b/drivers/net/ipa/ipa.h index 261c7263f9e31..c603575e2a58b 100644 --- a/drivers/net/ipa/ipa.h +++ b/drivers/net/ipa/ipa.h @@ -61,9 +61,10 @@ struct ipa_interrupt; * @zero_addr: DMA address of preallocated zero-filled memory * @zero_virt: Virtual address of preallocated zero-filled memory * @zero_size: Size (bytes) of preallocated zero-filled memory - * @endpoint_count: Number of endpoints represented by bit masks below + * @endpoint_count: Number of defined bits in most bitmaps below + * @available_count: Number of defined bits in the available bitmap * @defined: Bitmap of endpoints defined in config data - * @available: Bit mask indicating endpoints hardware supports + * @available: Bitmap of endpoints supported by hardware * @filter_map: Bit mask indicating endpoints that support filtering * @set_up: Bit mask indicating endpoints set up * @enabled: Bit mask indicating endpoints enabled @@ -119,8 +120,9 @@ struct ipa { /* Bitmaps indicating endpoint state */ u32 endpoint_count; + u32 available_count; unsigned long *defined; /* Defined in configuration data */ - u32 available; /* Supported by hardware */ + unsigned long *available; /* Supported by hardware */ u32 filter_map; u32 set_up; u32 enabled; diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c index abc939c272b5a..a7932e8d0b2bf 100644 --- a/drivers/net/ipa/ipa_endpoint.c +++ b/drivers/net/ipa/ipa_endpoint.c @@ -351,19 +351,17 @@ ipa_endpoint_program_delay(struct ipa_endpoint *endpoint, bool enable) static bool ipa_endpoint_aggr_active(struct ipa_endpoint *endpoint) { u32 endpoint_id = endpoint->endpoint_id; - u32 mask = BIT(endpoint_id % 32); struct ipa *ipa = endpoint->ipa; u32 unit = endpoint_id / 32; const struct ipa_reg *reg; u32 val; - /* This works until we actually have more than 32 endpoints */ - WARN_ON(!(mask & ipa->available)); + WARN_ON(!test_bit(endpoint_id, ipa->available)); reg = ipa_reg(ipa, STATE_AGGR_ACTIVE); val = ioread32(ipa->reg_virt + ipa_reg_n_offset(reg, unit)); - return !!(val & mask); + return !!(val & BIT(endpoint_id % 32)); } static void ipa_endpoint_force_close(struct ipa_endpoint *endpoint) @@ -374,8 +372,7 @@ static void ipa_endpoint_force_close(struct ipa_endpoint *endpoint) u32 unit = endpoint_id / 32; const struct ipa_reg *reg; - /* This works until we actually have more than 32 endpoints */ - WARN_ON(!(mask & ipa->available)); + WARN_ON(!test_bit(endpoint_id, ipa->available)); reg = ipa_reg(ipa, AGGR_FORCE_CLOSE); iowrite32(mask, ipa->reg_virt + ipa_reg_n_offset(reg, unit)); @@ -1841,6 +1838,13 @@ void ipa_endpoint_teardown(struct ipa *ipa) ipa->set_up = 0; } +void ipa_endpoint_deconfig(struct ipa *ipa) +{ + ipa->available_count = 0; + bitmap_free(ipa->available); + ipa->available = NULL; +} + int ipa_endpoint_config(struct ipa *ipa) { struct device *dev = &ipa->pdev->dev; @@ -1863,7 +1867,13 @@ int ipa_endpoint_config(struct ipa *ipa) * assume the configuration is valid. */ if (ipa->version < IPA_VERSION_3_5) { - ipa->available = ~0; + ipa->available = bitmap_zalloc(IPA_ENDPOINT_MAX, GFP_KERNEL); + if (!ipa->available) + return -ENOMEM; + ipa->available_count = IPA_ENDPOINT_MAX; + + bitmap_set(ipa->available, 0, IPA_ENDPOINT_MAX); + return 0; } @@ -1885,8 +1895,15 @@ int ipa_endpoint_config(struct ipa *ipa) return -EINVAL; } + /* Allocate and initialize the available endpoint bitmap */ + ipa->available = bitmap_zalloc(limit, GFP_KERNEL); + if (!ipa->available) + return -ENOMEM; + ipa->available_count = limit; + /* Mark all supported RX and TX endpoints as available */ - ipa->available = GENMASK(limit - 1, rx_base) | GENMASK(tx_count - 1, 0); + bitmap_set(ipa->available, 0, tx_count); + bitmap_set(ipa->available, rx_base, rx_count); for_each_set_bit(endpoint_id, ipa->defined, ipa->endpoint_count) { struct ipa_endpoint *endpoint; @@ -1894,13 +1911,13 @@ int ipa_endpoint_config(struct ipa *ipa) if (endpoint_id >= limit) { dev_err(dev, "invalid endpoint id, %u > %u\n", endpoint_id, limit - 1); - return -EINVAL; + goto err_free_bitmap; } - if (!(BIT(endpoint_id) & ipa->available)) { + if (!test_bit(endpoint_id, ipa->available)) { dev_err(dev, "unavailable endpoint id %u\n", endpoint_id); - return -EINVAL; + goto err_free_bitmap; } /* Make sure it's pointing in the right direction */ @@ -1913,15 +1930,15 @@ int ipa_endpoint_config(struct ipa *ipa) } dev_err(dev, "endpoint id %u wrong direction\n", endpoint_id); - return -EINVAL; + goto err_free_bitmap; } return 0; -} -void ipa_endpoint_deconfig(struct ipa *ipa) -{ - ipa->available = 0; /* Nothing more to do */ +err_free_bitmap: + ipa_endpoint_deconfig(ipa); + + return -EINVAL; } static void ipa_endpoint_init_one(struct ipa *ipa, enum ipa_endpoint_name name, diff --git a/drivers/net/ipa/ipa_interrupt.c b/drivers/net/ipa/ipa_interrupt.c index a62bc667bda0e..a49f66efacb87 100644 --- a/drivers/net/ipa/ipa_interrupt.c +++ b/drivers/net/ipa/ipa_interrupt.c @@ -132,14 +132,13 @@ static void ipa_interrupt_suspend_control(struct ipa_interrupt *interrupt, u32 endpoint_id, bool enable) { struct ipa *ipa = interrupt->ipa; - u32 mask = BIT(endpoint_id % 32); u32 unit = endpoint_id / 32; const struct ipa_reg *reg; u32 offset; + u32 mask; u32 val; - /* This works until we actually have more than 32 endpoints */ - WARN_ON(!(mask & ipa->available)); + WARN_ON(!test_bit(endpoint_id, ipa->available)); /* IPA version 3.0 does not support TX_SUSPEND interrupt control */ if (ipa->version == IPA_VERSION_3_0) @@ -148,10 +147,13 @@ static void ipa_interrupt_suspend_control(struct ipa_interrupt *interrupt, reg = ipa_reg(ipa, IRQ_SUSPEND_EN); offset = ipa_reg_n_offset(reg, unit); val = ioread32(ipa->reg_virt + offset); + + mask = BIT(endpoint_id); if (enable) val |= mask; else val &= ~mask; + iowrite32(val, ipa->reg_virt + offset); }