From patchwork Tue Jun 4 05:17:22 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: 13684664 Received: from lelv0142.ext.ti.com (lelv0142.ext.ti.com [198.47.23.249]) (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 038767C6D5; Tue, 4 Jun 2024 05:17:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.47.23.249 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717478259; cv=none; b=E5jqDhekt1j9rJdQgek1uN3urcln3O+/rjLNZKorxheNJEokOCxzR/seluPJj2uV4XHfPbEFPVoRphTaUQ6jgtEGKnfqUDJefy2Pt6niOSS5q0MW4HnY9wsiCgtKT4HpFo5VUtw5A9hevL7rfcxCXSX6EMX7gFRldxWKFQ9tVW4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717478259; c=relaxed/simple; bh=GwkCMWw3oi8gTTSHVAmKy7neG48Qxgizk9BHVwaSCdA=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=NV7h4AYU7+Lj13OdxtKt6C0Lu1jO2AWoWw27PS0bqVTnNTZqX8YjDTZX+L9XQF1InrYjel2xmG4EjRpSgU0ZbS0eSYCsUcm1cbB9c0ZaIcxUC6W6fH2MGY2k4Bh2GDwMT/ZILiLhrkdWIcMBTfWLjaj8y502JQ8d9fLtfzTM98o= 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=mGOOiSfX; arc=none smtp.client-ip=198.47.23.249 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="mGOOiSfX" Received: from fllv0035.itg.ti.com ([10.64.41.0]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id 4545HXCn041088; Tue, 4 Jun 2024 00:17:33 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1717478253; bh=0c0FIMvUv+8QpYHCEqlth87kUQCKC2xRbuBUQx70Jz8=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=mGOOiSfXlTZFIEWaJN8dUo9xe5lksBZ9m+dCeI07s0xo8nt3vSmZD7BWlse4lFJnN gGPVwA0fJr2dbVxrg/XFE6azdQb6BGU74NtotRyFFN4l8bs10CCHvcIavZ8WYLLP1S kRZ5Eto2DC30SdBJZdNdm1hrHVaBg+/++8ZZWJUQ= Received: from DLEE101.ent.ti.com (dlee101.ent.ti.com [157.170.170.31]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 4545HXAh031550 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 4 Jun 2024 00:17:33 -0500 Received: from DLEE101.ent.ti.com (157.170.170.31) by DLEE101.ent.ti.com (157.170.170.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Tue, 4 Jun 2024 00:17:33 -0500 Received: from lelvsmtp5.itg.ti.com (10.180.75.250) by DLEE101.ent.ti.com (157.170.170.31) 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; Tue, 4 Jun 2024 00:17:33 -0500 Received: from uda0510294.dhcp.ti.com (uda0510294.dhcp.ti.com [10.24.69.66]) by lelvsmtp5.itg.ti.com (8.15.2/8.15.2) with ESMTP id 4545HNG7067975; Tue, 4 Jun 2024 00:17:31 -0500 From: Beleswar Padhi To: , CC: , , , , Subject: [PATCH v2 3/3] remoteproc: k3-dsp: Acquire mailbox handle during probe routine Date: Tue, 4 Jun 2024 10:47:22 +0530 Message-ID: <20240604051722.3608750-4-b-padhi@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240604051722.3608750-1-b-padhi@ti.com> References: <20240604051722.3608750-1-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 | 76 ++++++++--------------- 1 file changed, 26 insertions(+), 50 deletions(-) diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c b/drivers/remoteproc/ti_k3_dsp_remoteproc.c index 3555b535b1683..edaa5e91aebe9 100644 --- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c +++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c @@ -115,6 +115,10 @@ static void k3_dsp_rproc_mbox_callback(struct mbox_client *client, void *data) const char *name = kproc->rproc->name; u32 msg = omap_mbox_message(data); + /* Do not forward messages to a detached core */ + if (kproc->rproc->state == RPROC_DETACHED) + return; + dev_dbg(dev, "mbox msg: 0x%x\n", msg); switch (msg) { @@ -230,12 +234,9 @@ static int k3_dsp_rproc_request_mbox(struct rproc *rproc) client->knows_txdone = false; 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; - } + if (IS_ERR(kproc->mbox)) + return dev_err_probe(dev, PTR_ERR(kproc->mbox), + "mbox_request_channel failed\n"); /* * Ping the remote processor, this is only for sanity-sake for now; @@ -315,32 +316,23 @@ 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; + return -EINVAL; } 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; + return ret; ret = k3_dsp_rproc_release(kproc); if (ret) - goto put_mbox; + return ret; return 0; - -put_mbox: - mbox_free_channel(kproc->mbox); - return ret; } /* @@ -353,8 +345,6 @@ 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 +353,22 @@ 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 because rproc_validate() checks + * for its existence. */ -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 +667,10 @@ 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), @@ -789,6 +763,8 @@ static void k3_dsp_rproc_remove(struct platform_device *pdev) if (ret) dev_err(dev, "failed to detach proc (%pe)\n", ERR_PTR(ret)); } + + mbox_free_channel(kproc->mbox); } static const struct k3_dsp_mem_data c66_mems[] = {