From patchwork Thu May 30 09:07:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Beleswar Prasad Padhi X-Patchwork-Id: 13680016 Received: from fllv0016.ext.ti.com (fllv0016.ext.ti.com [198.47.19.142]) (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 40A0018396E; Thu, 30 May 2024 09:07:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.47.19.142 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717060075; cv=none; b=CmzPcITBhqKmHGMESRTJ1IB65meInKRbCvGnO1LO7e0FHhrC3lxPn2FxGJ8rmpH3m3NqcwgseMjjhMMa217ymCDtX4JkFD8cscbXMuNjTtJOSGpEndbD63YQ5spAPfz7qOQiaRdDdl6NSdn66ZrM9JxfyMCCIvbVCEpcaY5ucMQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717060075; c=relaxed/simple; bh=5Y03twfQVgQmuNLj0UEmzZLgRbVlG6Rhm/xcpfzLatA=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=oA7tQZCVfNwh0yvBmtG8t+4zuX6VPT+r37NzlDcMOCLHA795WhRtXzA3RAWmat2IaZc6oBQi8pEfzNfPtzUfYrEJrmeYFLSLJAPSaN3Jogw6g+xQsJA+0JFp2m17lpO7AVXLWOuNIMDHc3R67Ndzwkr7fqBxlV3uKwOGcu1roT8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com; spf=pass smtp.mailfrom=ti.com; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b=k5tc6uBQ; arc=none smtp.client-ip=198.47.19.142 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ti.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="k5tc6uBQ" Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 44U97nMF024374; Thu, 30 May 2024 04:07:49 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1717060069; bh=GJzDRdOQb8ekKWtlPjrGD6Uo4aZvHTZhxUEY0veqFBM=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=k5tc6uBQnu6igfTRs+SHCHrw9qXE3Pp96NUx3pWj5oh9Koa9kgZmwyEsBGDarmLMZ sH4eo5cGXylY7f2i3+Ui2TRvspo1Co8tI3HjwTNHZbBCTPVDekdoVUwdHEFJvDEO2K BQh9pWAYh+fBmSg3FFJEkTP6khEw5dwmAJ+py584= Received: from DFLE102.ent.ti.com (dfle102.ent.ti.com [10.64.6.23]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 44U97nf1111857 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 30 May 2024 04:07:49 -0500 Received: from DFLE109.ent.ti.com (10.64.6.30) by DFLE102.ent.ti.com (10.64.6.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Thu, 30 May 2024 04:07:48 -0500 Received: from lelvsmtp6.itg.ti.com (10.180.75.249) by DFLE109.ent.ti.com (10.64.6.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Thu, 30 May 2024 04:07:48 -0500 Received: from uda0510294.dhcp.ti.com (uda0510294.dhcp.ti.com [10.24.69.66]) by lelvsmtp6.itg.ti.com (8.15.2/8.15.2) with ESMTP id 44U97clp043154; Thu, 30 May 2024 04:07:46 -0500 From: Beleswar Padhi To: , CC: , , , , Subject: [PATCH 3/3] remoteproc: k3-dsp: Acquire mailbox handle during probe routine Date: Thu, 30 May 2024 14:37:37 +0530 Message-ID: <20240530090737.655054-4-b-padhi@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240530090737.655054-1-b-padhi@ti.com> References: <20240530090737.655054-1-b-padhi@ti.com> Precedence: bulk X-Mailing-List: linux-remoteproc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Acquire the mailbox handle during device probe and do not release handle in stop/detach routine or error paths. This removes the redundant requests for mbox handle later during rproc start/attach. This also allows to defer remoteproc driver's probe if mailbox is not probed yet. Signed-off-by: Beleswar Padhi --- drivers/remoteproc/ti_k3_dsp_remoteproc.c | 67 +++++++---------------- 1 file changed, 21 insertions(+), 46 deletions(-) diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c b/drivers/remoteproc/ti_k3_dsp_remoteproc.c index 3555b535b168..88cda609a5eb 100644 --- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c +++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c @@ -222,6 +222,7 @@ static int k3_dsp_rproc_request_mbox(struct rproc *rproc) struct mbox_client *client = &kproc->client; struct device *dev = kproc->dev; int ret; + long err; client->dev = dev; client->tx_done = NULL; @@ -231,10 +232,9 @@ static int k3_dsp_rproc_request_mbox(struct rproc *rproc) kproc->mbox = mbox_request_channel(client, 0); if (IS_ERR(kproc->mbox)) { - ret = -EBUSY; - dev_err(dev, "mbox_request_channel failed: %ld\n", - PTR_ERR(kproc->mbox)); - return ret; + err = PTR_ERR(kproc->mbox); + dev_err(dev, "mbox_request_channel failed: %ld\n", err); + return (err == -EPROBE_DEFER) ? -EPROBE_DEFER : -EBUSY; } /* @@ -315,31 +315,25 @@ static int k3_dsp_rproc_start(struct rproc *rproc) u32 boot_addr; int ret; - ret = k3_dsp_rproc_request_mbox(rproc); - if (ret) - return ret; - boot_addr = rproc->bootaddr; if (boot_addr & (kproc->data->boot_align_addr - 1)) { dev_err(dev, "invalid boot address 0x%x, must be aligned on a 0x%x boundary\n", boot_addr, kproc->data->boot_align_addr); ret = -EINVAL; - goto put_mbox; + goto out; } dev_err(dev, "booting DSP core using boot addr = 0x%x\n", boot_addr); ret = ti_sci_proc_set_config(kproc->tsp, boot_addr, 0, 0); if (ret) - goto put_mbox; + goto out; ret = k3_dsp_rproc_release(kproc); if (ret) - goto put_mbox; + goto out; return 0; - -put_mbox: - mbox_free_channel(kproc->mbox); +out: return ret; } @@ -353,8 +347,6 @@ static int k3_dsp_rproc_stop(struct rproc *rproc) { struct k3_dsp_rproc *kproc = rproc->priv; - mbox_free_channel(kproc->mbox); - k3_dsp_rproc_reset(kproc); return 0; @@ -363,42 +355,21 @@ static int k3_dsp_rproc_stop(struct rproc *rproc) /* * Attach to a running DSP remote processor (IPC-only mode) * - * This rproc attach callback only needs to request the mailbox, the remote - * processor is already booted, so there is no need to issue any TI-SCI - * commands to boot the DSP core. This callback is invoked only in IPC-only - * mode. + * This rproc attach callback is a NOP. The remote processor is already booted, + * and all required resources have been acquired during probe routine, so there + * is no need to issue any TI-SCI commands to boot the DSP core. This callback + * is invoked only in IPC-only mode and exists for sanity sake. */ -static int k3_dsp_rproc_attach(struct rproc *rproc) -{ - struct k3_dsp_rproc *kproc = rproc->priv; - struct device *dev = kproc->dev; - int ret; - - ret = k3_dsp_rproc_request_mbox(rproc); - if (ret) - return ret; - - dev_info(dev, "DSP initialized in IPC-only mode\n"); - return 0; -} +static int k3_dsp_rproc_attach(struct rproc *rproc) { return 0; } /* * Detach from a running DSP remote processor (IPC-only mode) * - * This rproc detach callback performs the opposite operation to attach callback - * and only needs to release the mailbox, the DSP core is not stopped and will - * be left to continue to run its booted firmware. This callback is invoked only - * in IPC-only mode. + * This rproc detach callback is a NOP. The DSP core is not stopped and will be + * left to continue to run its booted firmware. This callback is invoked only in + * IPC-only mode and exists for sanity sake. */ -static int k3_dsp_rproc_detach(struct rproc *rproc) -{ - struct k3_dsp_rproc *kproc = rproc->priv; - struct device *dev = kproc->dev; - - mbox_free_channel(kproc->mbox); - dev_info(dev, "DSP deinitialized in IPC-only mode\n"); - return 0; -} +static int k3_dsp_rproc_detach(struct rproc *rproc) { return 0; } /* * This function implements the .get_loaded_rsc_table() callback and is used @@ -697,6 +668,10 @@ static int k3_dsp_rproc_probe(struct platform_device *pdev) kproc->dev = dev; kproc->data = data; + ret = k3_dsp_rproc_request_mbox(rproc); + if (ret) + return ret; + kproc->ti_sci = devm_ti_sci_get_by_phandle(dev, "ti,sci"); if (IS_ERR(kproc->ti_sci)) return dev_err_probe(dev, PTR_ERR(kproc->ti_sci),