From patchwork Wed Nov 2 22:11:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Elder X-Patchwork-Id: 13029069 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 79E4EC4332F for ; Wed, 2 Nov 2022 22:12:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231536AbiKBWL6 (ORCPT ); Wed, 2 Nov 2022 18:11:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231483AbiKBWLy (ORCPT ); Wed, 2 Nov 2022 18:11:54 -0400 Received: from mail-io1-xd35.google.com (mail-io1-xd35.google.com [IPv6:2607:f8b0:4864:20::d35]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E46EFBC39 for ; Wed, 2 Nov 2022 15:11:49 -0700 (PDT) Received: by mail-io1-xd35.google.com with SMTP id q142so10170418iod.5 for ; Wed, 02 Nov 2022 15:11:49 -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=VEI5E4A3vhqdvxEYC9B1ojiSJqRCvJ6S+f0LRwCXl84=; b=sJgJzXAqRNzN7lh5eguknfY6N9k8MNwIdJZU9RBg0YAZftpPvzdYy8wNCGktoNwnTD w8sQ7LkwHni0YBJXn80O/6SAfXlZkiGX4LGlaaYZScGTdQ18cxx3AtmyB1cm3ddt0e2E 5iLlxoXHnT1XX6/vep5twV8gz0QJjjNqqLNvv3qbSwlsKrTZtNPs2PDCGxus0glIZjyP PEDTxiA2D5KesViHh/zHOTE3vNwVFGVKmOH6+n96jE9jHO83/zuUa9T3sGGBrEE78t6X e5ZyoN8sm0b6pFcUJvlGmx3syzJ5y7ptwO2Jwi4Y1y/WzZnalxVxe8R5T4nV278cWFmk 9/KA== 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=VEI5E4A3vhqdvxEYC9B1ojiSJqRCvJ6S+f0LRwCXl84=; b=1AXb/YDL1Y5vS3+TIsvufeaXau4gtzFXN+TmaefPTD65V733HBQR1MW7/pCu+GucMc 9489zcnSQmOOXLCuqtPbwmRoFjQDGF0s6ZGhBETt3LO+r7MdSk/pB7zq+ENnL4W7JvGd 9+teybu7JtE9QjYos2/SrFObqhqymhnMg8e8ihdn/Ngot88Rt0/rZILBJ5nOhXEMfJuV hm7E3tlfGiOYvZdFw/GjHFEgyksZgm5Op19apj4vo6Zw2zWdaqi92lOd+Ae/NuEuCBXo X0GDXvz2tNdHYmdeL+NKdatLuG9tHFsGS7UVXdG8UeCaPgwvG5Quo0wywESNBVPLU3OK KaIw== X-Gm-Message-State: ACrzQf1se+1q1yKINY9IGY28U48OYip5HjRIf1bLUkjfdBos0IuvfMAz CAXi0Hst2qb6ZZsoOzCgIg9edg== X-Google-Smtp-Source: AMsMyM7D+x4wCjCzeeM5blvV+k6kc5ELuf07VPWCoSp27l9OlIJjFiWktoD7vRTYmi9R48sGJcs58Q== X-Received: by 2002:a05:6602:1495:b0:6d4:a262:aeff with SMTP id a21-20020a056602149500b006d4a262aeffmr3399533iow.35.1667427109455; Wed, 02 Nov 2022 15:11:49 -0700 (PDT) Received: from presto.localdomain ([98.61.227.136]) by smtp.gmail.com with ESMTPSA id f8-20020a02a108000000b0037465a1dd3fsm5073974jag.156.2022.11.02.15.11.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Nov 2022 15:11:49 -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 5/9] net: ipa: use a bitmap for defined endpoints Date: Wed, 2 Nov 2022 17:11:35 -0500 Message-Id: <20221102221139.1091510-6-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 IPA v5.0 supports more than 32 endpoints, so we will be unable to represent endpoints defined in the configuration data with a 32-bit value. To prepare for that, convert the field in the IPA structure representing defined endpoints to be a Linux bitmap. Convert loops based on that field into for_each_set_bit() calls over the new bitmap. Note that the loop in ipa_endpoint_config() still assumes there are 32 or fewer endpoints (when comparing against the available endpoint bit mask); that assumption goes away in the next patch. Signed-off-by: Alex Elder --- v2: - Don't print a message on bitmap allocation error drivers/net/ipa/ipa.h | 6 ++--- drivers/net/ipa/ipa_endpoint.c | 46 +++++++++++++--------------------- 2 files changed, 21 insertions(+), 31 deletions(-) diff --git a/drivers/net/ipa/ipa.h b/drivers/net/ipa/ipa.h index a44595575d066..261c7263f9e31 100644 --- a/drivers/net/ipa/ipa.h +++ b/drivers/net/ipa/ipa.h @@ -62,7 +62,7 @@ struct ipa_interrupt; * @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 - * @defined: Bit mask indicating endpoints defined in config data + * @defined: Bitmap of endpoints defined in config data * @available: Bit mask indicating endpoints hardware supports * @filter_map: Bit mask indicating endpoints that support filtering * @set_up: Bit mask indicating endpoints set up @@ -117,9 +117,9 @@ struct ipa { void *zero_virt; size_t zero_size; - /* Bit masks indicating endpoint state */ + /* Bitmaps indicating endpoint state */ u32 endpoint_count; - u32 defined; /* Defined in configuration data */ + unsigned long *defined; /* Defined in configuration data */ u32 available; /* Supported by hardware */ u32 filter_map; u32 set_up; diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c index 32559ed498c19..abc939c272b5a 100644 --- a/drivers/net/ipa/ipa_endpoint.c +++ b/drivers/net/ipa/ipa_endpoint.c @@ -459,8 +459,8 @@ void ipa_endpoint_modem_pause_all(struct ipa *ipa, bool enable) /* Reset all modem endpoints to use the default exception endpoint */ int ipa_endpoint_modem_exception_reset_all(struct ipa *ipa) { - u32 defined = ipa->defined; struct gsi_trans *trans; + u32 endpoint_id; u32 count; /* We need one command per modem TX endpoint, plus the commands @@ -474,14 +474,11 @@ int ipa_endpoint_modem_exception_reset_all(struct ipa *ipa) return -EBUSY; } - while (defined) { - u32 endpoint_id = __ffs(defined); + for_each_set_bit(endpoint_id, ipa->defined, ipa->endpoint_count) { struct ipa_endpoint *endpoint; const struct ipa_reg *reg; u32 offset; - defined ^= BIT(endpoint_id); - /* We only reset modem TX endpoints */ endpoint = &ipa->endpoint[endpoint_id]; if (!(endpoint->ee_id == GSI_EE_MODEM && endpoint->toward_ipa)) @@ -1823,16 +1820,11 @@ static void ipa_endpoint_teardown_one(struct ipa_endpoint *endpoint) void ipa_endpoint_setup(struct ipa *ipa) { - u32 defined = ipa->defined; + u32 endpoint_id; ipa->set_up = 0; - while (defined) { - u32 endpoint_id = __ffs(defined); - - defined ^= BIT(endpoint_id); - + for_each_set_bit(endpoint_id, ipa->defined, ipa->endpoint_count) ipa_endpoint_setup_one(&ipa->endpoint[endpoint_id]); - } } void ipa_endpoint_teardown(struct ipa *ipa) @@ -1853,10 +1845,10 @@ int ipa_endpoint_config(struct ipa *ipa) { struct device *dev = &ipa->pdev->dev; const struct ipa_reg *reg; + u32 endpoint_id; u32 tx_count; u32 rx_count; u32 rx_base; - u32 defined; u32 limit; u32 val; @@ -1896,13 +1888,9 @@ int ipa_endpoint_config(struct ipa *ipa) /* Mark all supported RX and TX endpoints as available */ ipa->available = GENMASK(limit - 1, rx_base) | GENMASK(tx_count - 1, 0); - defined = ipa->defined; - while (defined) { - u32 endpoint_id = __ffs(defined); + for_each_set_bit(endpoint_id, ipa->defined, ipa->endpoint_count) { struct ipa_endpoint *endpoint; - defined ^= BIT(endpoint_id); - if (endpoint_id >= limit) { dev_err(dev, "invalid endpoint id, %u > %u\n", endpoint_id, limit - 1); @@ -1954,27 +1942,26 @@ static void ipa_endpoint_init_one(struct ipa *ipa, enum ipa_endpoint_name name, endpoint->toward_ipa = data->toward_ipa; endpoint->config = data->endpoint.config; - ipa->defined |= BIT(endpoint->endpoint_id); + __set_bit(endpoint->endpoint_id, ipa->defined); } static void ipa_endpoint_exit_one(struct ipa_endpoint *endpoint) { - endpoint->ipa->defined &= ~BIT(endpoint->endpoint_id); + __clear_bit(endpoint->endpoint_id, endpoint->ipa->defined); memset(endpoint, 0, sizeof(*endpoint)); } void ipa_endpoint_exit(struct ipa *ipa) { - u32 defined = ipa->defined; - - while (defined) { - u32 endpoint_id = __fls(defined); - - defined ^= BIT(endpoint_id); + u32 endpoint_id; + for_each_set_bit(endpoint_id, ipa->defined, ipa->endpoint_count) ipa_endpoint_exit_one(&ipa->endpoint[endpoint_id]); - } + + bitmap_free(ipa->defined); + ipa->defined = NULL; + memset(ipa->name_map, 0, sizeof(ipa->name_map)); memset(ipa->channel_map, 0, sizeof(ipa->channel_map)); } @@ -1993,7 +1980,10 @@ u32 ipa_endpoint_init(struct ipa *ipa, u32 count, if (!ipa->endpoint_count) return 0; /* Error */ - ipa->defined = 0; + /* Initialize the defined endpoint bitmap */ + ipa->defined = bitmap_zalloc(ipa->endpoint_count, GFP_KERNEL); + if (!ipa->defined) + return 0; /* Error */ filter_map = 0; for (name = 0; name < count; name++, data++) {