From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 89E2115E5BB; Sat, 17 Oct 2026 17:30:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792258203; cv=none; b=EUYkVhGG/x6n43lHa+0+JXM2usGFGb8n4f7xsvN2qLMZAji9rbYEIrcezLTwzCHuAqkN1OHgN2jmR4uZEh28cleS+SdxCmSqcUp9N9Ri6TPtjXTICN82IrR7dt331BNJ3K2plnNNVJOUdD7yUqq860bXEW4lfZufJXVvowRIsTw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792258203; c=relaxed/simple; bh=zVavgVjNzZbF4Zwn5TnmKHagYbokX20S8wdcQVIU+DU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CUztBh/N5u2veQMZE7rRdxqcIpRnVQwSrjz9UGD1t6hzBLyJD09OmKhZrgDGNHwW2OMKQBR6PfGMGs6PDQaWgGTwEFA3No4vfHLbI99on9tmT2/u3RiU6ghCEQjPbeXreFdeqLEG6XtJwg3lGfvv8wRR8pjaUTNQkUL625VCKjA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=WTYrGIBO; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="WTYrGIBO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 786331F000C4; Sat, 17 Oct 2026 17:30:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792258202; bh=684/fsruA/x0JLxWTnxHOfuB5g9AmmfiwWM3oLhBmcc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=WTYrGIBOU6kH3SIDd+DuLPx3mhZIMWyaiqiHqjBy8xVrNr2OIOI4pnxX87W8U2UQ1 ibM3vJYUrirYFNrnoHe5DJHiuGrQPqlxLu24pO+OtTnTlpTv+cKDHZ7EzIiuxGoR+5 U+Bnvx+2pFLPPJ+3xCacsv5c8PwaFHT7DXnkpGkQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ben Levinsky , Jassi Brar , Sasha Levin Subject: [PATCH 6.6 0807/1674] mailbox: zynqmp: Move buffered IPI setup to of_match selected routine Date: Sat, 17 Oct 2026 17:51:19 +0200 Message-ID: <20261017160451.829959087@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261017160431.119607952@linuxfoundation.org> References: <20261017160431.119607952@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ben Levinsky [ Upstream commit 41bcf30100c521c73f0fcf05c3dc31967e6408be ] Move routine that initializes the mailboxes for send and receive to a function pointer that is set based on compatible string. Signed-off-by: Ben Levinsky Signed-off-by: Jassi Brar Stable-dep-of: 0aead8197fc1 ("mailbox: zynqmp-ipi: Fix out-of-bounds access in mailbox cleanup loop") Signed-off-by: Sasha Levin --- drivers/mailbox/zynqmp-ipi-mailbox.c | 122 +++++++++++++++++++-------- 1 file changed, 87 insertions(+), 35 deletions(-) diff --git a/drivers/mailbox/zynqmp-ipi-mailbox.c b/drivers/mailbox/zynqmp-ipi-mailbox.c index 6a523759efa8b..b3428c714e2f6 100644 --- a/drivers/mailbox/zynqmp-ipi-mailbox.c +++ b/drivers/mailbox/zynqmp-ipi-mailbox.c @@ -72,6 +72,10 @@ struct zynqmp_ipi_mchan { unsigned int chan_type; }; +struct zynqmp_ipi_mbox; + +typedef int (*setup_ipi_fn)(struct zynqmp_ipi_mbox *ipi_mbox, struct device_node *node); + /** * struct zynqmp_ipi_mbox - Description of a ZynqMP IPI mailbox * platform data. @@ -81,6 +85,7 @@ struct zynqmp_ipi_mchan { * @remote_id: remote IPI agent ID * @mbox: mailbox Controller * @mchans: array for channels, tx channel and rx channel. + * @setup_ipi_fn: Function Pointer to set up IPI Channels */ struct zynqmp_ipi_mbox { struct zynqmp_ipi_pdata *pdata; @@ -88,6 +93,7 @@ struct zynqmp_ipi_mbox { u32 remote_id; struct mbox_controller mbox; struct zynqmp_ipi_mchan mchans[2]; + setup_ipi_fn setup_ipi_fn; }; /** @@ -464,12 +470,9 @@ static void zynqmp_ipi_mbox_dev_release(struct device *dev) static int zynqmp_ipi_mbox_probe(struct zynqmp_ipi_mbox *ipi_mbox, struct device_node *node) { - struct zynqmp_ipi_mchan *mchan; struct mbox_chan *chans; struct mbox_controller *mbox; - struct resource res; struct device *dev, *mdev; - const char *name; int ret; dev = ipi_mbox->pdata->dev; @@ -489,6 +492,73 @@ static int zynqmp_ipi_mbox_probe(struct zynqmp_ipi_mbox *ipi_mbox, } mdev = &ipi_mbox->dev; + /* Get the IPI remote agent ID */ + ret = of_property_read_u32(node, "xlnx,ipi-id", &ipi_mbox->remote_id); + if (ret < 0) { + dev_err(dev, "No IPI remote ID is specified.\n"); + return ret; + } + + ret = ipi_mbox->setup_ipi_fn(ipi_mbox, node); + if (ret) { + dev_err(dev, "Failed to set up IPI Buffers.\n"); + return ret; + } + + mbox = &ipi_mbox->mbox; + mbox->dev = mdev; + mbox->ops = &zynqmp_ipi_chan_ops; + mbox->num_chans = 2; + mbox->txdone_irq = false; + mbox->txdone_poll = true; + mbox->txpoll_period = 5; + mbox->of_xlate = zynqmp_ipi_of_xlate; + chans = devm_kzalloc(mdev, 2 * sizeof(*chans), GFP_KERNEL); + if (!chans) + return -ENOMEM; + mbox->chans = chans; + chans[IPI_MB_CHNL_TX].con_priv = &ipi_mbox->mchans[IPI_MB_CHNL_TX]; + chans[IPI_MB_CHNL_RX].con_priv = &ipi_mbox->mchans[IPI_MB_CHNL_RX]; + ipi_mbox->mchans[IPI_MB_CHNL_TX].chan_type = IPI_MB_CHNL_TX; + ipi_mbox->mchans[IPI_MB_CHNL_RX].chan_type = IPI_MB_CHNL_RX; + ret = devm_mbox_controller_register(mdev, mbox); + if (ret) + dev_err(mdev, + "Failed to register mbox_controller(%d)\n", ret); + else + dev_info(mdev, + "Registered ZynqMP IPI mbox with TX/RX channels.\n"); + return ret; +} + +/** + * zynqmp_ipi_setup - set up IPI Buffers for classic flow + * + * @ipi_mbox: pointer to IPI mailbox private data structure + * @node: IPI mailbox device node + * + * This will be used to set up IPI Buffers for ZynqMP SOC if user + * wishes to use classic driver usage model on new SOC's with only + * buffered IPIs. + * + * Note that bufferless IPIs and mixed usage of buffered and bufferless + * IPIs are not supported with this flow. + * + * This will be invoked with compatible string "xlnx,zynqmp-ipi-mailbox". + * + * Return: 0 for success, negative value for failure + */ +static int zynqmp_ipi_setup(struct zynqmp_ipi_mbox *ipi_mbox, + struct device_node *node) +{ + struct zynqmp_ipi_mchan *mchan; + struct device *mdev; + struct resource res; + const char *name; + int ret; + + mdev = &ipi_mbox->dev; + mchan = &ipi_mbox->mchans[IPI_MB_CHNL_TX]; name = "local_request_region"; ret = zynqmp_ipi_mbox_get_buf_res(node, name, &res); @@ -563,37 +633,7 @@ static int zynqmp_ipi_mbox_probe(struct zynqmp_ipi_mbox *ipi_mbox, if (!mchan->rx_buf) return -ENOMEM; - /* Get the IPI remote agent ID */ - ret = of_property_read_u32(node, "xlnx,ipi-id", &ipi_mbox->remote_id); - if (ret < 0) { - dev_err(dev, "No IPI remote ID is specified.\n"); - return ret; - } - - mbox = &ipi_mbox->mbox; - mbox->dev = mdev; - mbox->ops = &zynqmp_ipi_chan_ops; - mbox->num_chans = 2; - mbox->txdone_irq = false; - mbox->txdone_poll = true; - mbox->txpoll_period = 5; - mbox->of_xlate = zynqmp_ipi_of_xlate; - chans = devm_kzalloc(mdev, 2 * sizeof(*chans), GFP_KERNEL); - if (!chans) - return -ENOMEM; - mbox->chans = chans; - chans[IPI_MB_CHNL_TX].con_priv = &ipi_mbox->mchans[IPI_MB_CHNL_TX]; - chans[IPI_MB_CHNL_RX].con_priv = &ipi_mbox->mchans[IPI_MB_CHNL_RX]; - ipi_mbox->mchans[IPI_MB_CHNL_TX].chan_type = IPI_MB_CHNL_TX; - ipi_mbox->mchans[IPI_MB_CHNL_RX].chan_type = IPI_MB_CHNL_RX; - ret = devm_mbox_controller_register(mdev, mbox); - if (ret) - dev_err(mdev, - "Failed to register mbox_controller(%d)\n", ret); - else - dev_info(mdev, - "Registered ZynqMP IPI mbox with TX/RX channels.\n"); - return ret; + return 0; } /** @@ -621,6 +661,7 @@ static int zynqmp_ipi_probe(struct platform_device *pdev) struct zynqmp_ipi_pdata *pdata; struct zynqmp_ipi_mbox *mbox; int num_mboxes, ret = -EINVAL; + setup_ipi_fn ipi_fn; num_mboxes = of_get_available_child_count(np); if (num_mboxes == 0) { @@ -641,9 +682,18 @@ static int zynqmp_ipi_probe(struct platform_device *pdev) return ret; } + ipi_fn = (setup_ipi_fn)device_get_match_data(&pdev->dev); + if (!ipi_fn) { + dev_err(dev, + "Mbox Compatible String is missing IPI Setup fn.\n"); + return -ENODEV; + } + pdata->num_mboxes = num_mboxes; mbox = pdata->ipi_mboxes; + mbox->setup_ipi_fn = ipi_fn; + for_each_available_child_of_node(np, nc) { mbox->pdata = pdata; ret = zynqmp_ipi_mbox_probe(mbox, nc); @@ -689,7 +739,9 @@ static int zynqmp_ipi_remove(struct platform_device *pdev) } static const struct of_device_id zynqmp_ipi_of_match[] = { - { .compatible = "xlnx,zynqmp-ipi-mailbox" }, + { .compatible = "xlnx,zynqmp-ipi-mailbox", + .data = &zynqmp_ipi_setup, + }, {}, }; MODULE_DEVICE_TABLE(of, zynqmp_ipi_of_match); -- 2.53.0