From patchwork Thu May 30 09:07:36 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: 13680015 Received: from fllv0015.ext.ti.com (fllv0015.ext.ti.com [198.47.19.141]) (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 22A5C183963; Thu, 30 May 2024 09:07:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.47.19.141 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717060072; cv=none; b=uPbRXkdR4k5CxQdwrKdcRtr4rc2IhMnF6N9CqUZAczs64ShFRgeUVfurgCd8lw+IX5BmvFwTkaT3PRVru6oEWbakiP8RRp7UZ7ktnxgdvk/2/Zny7L2DBaMUlyo+AgiOQyU07jogdCjgBeCCq37rFOzqWM2dcMMUUOXqkai2my0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717060072; c=relaxed/simple; bh=80O/avVgyRmR5/cGtT+wKdgX1l4HaWOoIruqZS8mlng=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=J9IgQWj0WDaM8xsUtUFPblNhKH+v2qyv/BbJdE+FcuN7VbIbXKnR+1je5R4a9SFMaDZrwTrs3IbxhdNIasaxriUTOFkfwDyxf6iADAreQHIK6q+CR+d7QRgibTUgrwhjY6N4QvsX61jQPElc4gkRpl1C6/PSQ+hzNWF4EAUchZQ= 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=cX4czNbj; arc=none smtp.client-ip=198.47.19.141 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="cX4czNbj" Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 44U97kQF117563; Thu, 30 May 2024 04:07:46 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1717060066; bh=aB4XUryfXOQe2WgbvfYnussa3QvExaMJC1tVvIKNdLY=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=cX4czNbjSjMMQQG3OFzFLgYyX8O/Tcx1TOWEudXM7whlNPrUW79VLKgpvwPHzID/0 VZ04ZB4SA4mJ7I7LFPQaWGTcwcI7CevxcN5POOaCkzwivRWK36g6PmFGBiSWgxXuU5 o461aX5ms/e6kG4wyHxyuzRLsY376VC2R3dRSlmM= Received: from DFLE109.ent.ti.com (dfle109.ent.ti.com [10.64.6.30]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 44U97kfZ038322 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 30 May 2024 04:07:46 -0500 Received: from DFLE111.ent.ti.com (10.64.6.32) 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; Thu, 30 May 2024 04:07:46 -0500 Received: from lelvsmtp6.itg.ti.com (10.180.75.249) by DFLE111.ent.ti.com (10.64.6.32) 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 04:07:46 -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 44U97clo043154; Thu, 30 May 2024 04:07:44 -0500 From: Beleswar Padhi To: , CC: , , , , Subject: [PATCH 2/3] remoteproc: k3-r5: Acquire mailbox handle during probe Date: Thu, 30 May 2024 14:37:36 +0530 Message-ID: <20240530090737.655054-3-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_r5_remoteproc.c | 66 ++++++++---------------- 1 file changed, 21 insertions(+), 45 deletions(-) diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c index 26362a509ae3..157e8fd57665 100644 --- a/drivers/remoteproc/ti_k3_r5_remoteproc.c +++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c @@ -391,6 +391,7 @@ static int k3_r5_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; @@ -400,10 +401,9 @@ static int k3_r5_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; } /* @@ -552,10 +552,6 @@ static int k3_r5_rproc_start(struct rproc *rproc) u32 boot_addr; int ret; - ret = k3_r5_rproc_request_mbox(rproc); - if (ret) - return ret; - boot_addr = rproc->bootaddr; /* TODO: add boot_addr sanity checking */ dev_dbg(dev, "booting R5F core using boot addr = 0x%x\n", boot_addr); @@ -564,7 +560,7 @@ static int k3_r5_rproc_start(struct rproc *rproc) core = kproc->core; ret = ti_sci_proc_set_config(core->tsp, boot_addr, 0, 0); if (ret) - goto put_mbox; + goto out; /* unhalt/run all applicable cores */ if (cluster->mode == CLUSTER_MODE_LOCKSTEP) { @@ -581,12 +577,12 @@ static int k3_r5_rproc_start(struct rproc *rproc) dev_err(dev, "%s: can not start core 1 before core 0\n", __func__); ret = -EPERM; - goto put_mbox; + goto out; } ret = k3_r5_core_run(core); if (ret) - goto put_mbox; + goto out; } return 0; @@ -596,8 +592,7 @@ static int k3_r5_rproc_start(struct rproc *rproc) if (k3_r5_core_halt(core)) dev_warn(core->dev, "core halt back failed\n"); } -put_mbox: - mbox_free_channel(kproc->mbox); +out: return ret; } @@ -658,8 +653,6 @@ static int k3_r5_rproc_stop(struct rproc *rproc) goto out; } - mbox_free_channel(kproc->mbox); - return 0; unroll_core_halt: @@ -674,42 +667,21 @@ static int k3_r5_rproc_stop(struct rproc *rproc) /* * Attach to a running R5F remote processor (IPC-only mode) * - * The R5F 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 R5F cores in IPC-only mode. This callback is invoked - * only in IPC-only mode. + * The R5F 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 R5F cores in IPC-only mode. + * This callback is invoked only in IPC-only mode and exists for sanity sake. */ -static int k3_r5_rproc_attach(struct rproc *rproc) -{ - struct k3_r5_rproc *kproc = rproc->priv; - struct device *dev = kproc->dev; - int ret; - - ret = k3_r5_rproc_request_mbox(rproc); - if (ret) - return ret; - - dev_info(dev, "R5F core initialized in IPC-only mode\n"); - return 0; -} +static int k3_r5_rproc_attach(struct rproc *rproc) { return 0; } /* * Detach from a running R5F remote processor (IPC-only mode) * - * The R5F detach callback performs the opposite operation to attach callback - * and only needs to release the mailbox, the R5F cores are not stopped and - * will be left in booted state in IPC-only mode. This callback is invoked - * only in IPC-only mode. + * The R5F detach callback is a NOP. The R5F cores are not stopped and will be + * left in booted state in IPC-only mode. This callback is invoked only in + * IPC-only mode and exists for sanity sake. */ -static int k3_r5_rproc_detach(struct rproc *rproc) -{ - struct k3_r5_rproc *kproc = rproc->priv; - struct device *dev = kproc->dev; - - mbox_free_channel(kproc->mbox); - dev_info(dev, "R5F core deinitialized in IPC-only mode\n"); - return 0; -} +static int k3_r5_rproc_detach(struct rproc *rproc) { return 0; } /* * This function implements the .get_loaded_rsc_table() callback and is used @@ -1277,6 +1249,10 @@ static int k3_r5_cluster_rproc_init(struct platform_device *pdev) kproc->rproc = rproc; core->rproc = rproc; + ret = k3_r5_rproc_request_mbox(rproc); + if (ret) + return ret; + ret = k3_r5_rproc_configure_mode(kproc); if (ret < 0) goto err_config;