From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 C368F14AA9; Mon, 14 Oct 2024 15:26:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728919561; cv=none; b=d5ZmcEjSKmupFLqPjtOlvX1AMKN9Az5U+iV2ObWRgwdHde+WCUKE+aCZ3cZZTsfwlafwQatXQJ+k9O8BOcz/xG2lzEeuY441nfyxIJP8KNVQh1MjL22XOql0IYz2R2aMv/z6I8j3HU2d1LW4bo+L/kfqfKmgEi8AXh9AzccxwVk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728919561; c=relaxed/simple; bh=me8aOL/C1VrWMn+AOJNhjGqxFPFRBeI3kLpBXl0l2LQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RrQncFBML5U12QMX1jeN4DFCkq/CmbAFVtc8/xbBKMgn3D2o63mqazdKZs0sYaW7bLhg5kFWZDeGRgavjCK1Ia20J8dpsRGCd/f5F3ZiAeFPaTJPQK0EH5cUtcb9hC8r1SuPb5i3UHFU3d03qcfrsnCTHoDK1eHs2Y/jnVaGA54= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=xQbcuZ4y; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="xQbcuZ4y" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CBF78C4CEC3; Mon, 14 Oct 2024 15:26:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728919561; bh=me8aOL/C1VrWMn+AOJNhjGqxFPFRBeI3kLpBXl0l2LQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xQbcuZ4yG1KF+/ho1rkQQM9U76+CEnQwsD1eK+Cub4Wt+MyrclNIpndUDfsG+pbMt NZyJPpari1KkH/cK3AwVOOSQ2nayfMjDRk1YxOAUDKfaHJFjrPq/IrMraShIBFafUl eneeaCngMV4qy7jyp10Rkf24yS7Sip0xcSY9KahI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Beleswar Padhi , Mathieu Poirier , Sasha Levin Subject: [PATCH 6.1 642/798] remoteproc: k3-r5: Acquire mailbox handle during probe routine Date: Mon, 14 Oct 2024 16:19:56 +0200 Message-ID: <20241014141243.261866146@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241014141217.941104064@linuxfoundation.org> References: <20241014141217.941104064@linuxfoundation.org> User-Agent: quilt/0.67 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 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Beleswar Padhi [ Upstream commit f3f11cfe890733373ddbb1ce8991ccd4ee5e79e1 ] 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 Link: https://lore.kernel.org/r/20240808074127.2688131-3-b-padhi@ti.com Signed-off-by: Mathieu Poirier Stable-dep-of: 8fa052c29e50 ("remoteproc: k3-r5: Delay notification of wakeup event") Signed-off-by: Sasha Levin --- drivers/remoteproc/ti_k3_r5_remoteproc.c | 78 +++++++++--------------- 1 file changed, 30 insertions(+), 48 deletions(-) diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c index 496a1c19a37e6..75bfe62736ab1 100644 --- a/drivers/remoteproc/ti_k3_r5_remoteproc.c +++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c @@ -189,6 +189,10 @@ static void k3_r5_rproc_mbox_callback(struct mbox_client *client, void *data) const char *name = kproc->rproc->name; u32 msg = omap_mbox_message(data); + /* Do not forward message from a detached core */ + if (kproc->rproc->state == RPROC_DETACHED) + return; + dev_dbg(dev, "mbox msg: 0x%x\n", msg); switch (msg) { @@ -224,6 +228,10 @@ static void k3_r5_rproc_kick(struct rproc *rproc, int vqid) mbox_msg_t msg = (mbox_msg_t)vqid; int ret; + /* Do not forward message to a detached core */ + if (kproc->rproc->state == RPROC_DETACHED) + return; + /* send the index of the triggered virtqueue in the mailbox payload */ ret = mbox_send_message(kproc->mbox, (void *)msg); if (ret < 0) @@ -394,12 +402,9 @@ static int k3_r5_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; @@ -547,10 +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); @@ -559,7 +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; + return ret; /* unhalt/run all applicable cores */ if (cluster->mode == CLUSTER_MODE_LOCKSTEP) { @@ -575,13 +576,12 @@ static int k3_r5_rproc_start(struct rproc *rproc) if (core != core0 && core0->rproc->state == RPROC_OFFLINE) { dev_err(dev, "%s: can not start core 1 before core 0\n", __func__); - ret = -EPERM; - goto put_mbox; + return -EPERM; } ret = k3_r5_core_run(core); if (ret) - goto put_mbox; + return ret; } return 0; @@ -591,8 +591,6 @@ 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); return ret; } @@ -653,8 +651,6 @@ static int k3_r5_rproc_stop(struct rproc *rproc) goto out; } - mbox_free_channel(kproc->mbox); - return 0; unroll_core_halt: @@ -669,42 +665,22 @@ 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 because + * rproc_validate() checks for its existence. */ -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 @@ -1273,6 +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; @@ -1388,6 +1368,8 @@ static void k3_r5_cluster_rproc_exit(void *data) } } + mbox_free_channel(kproc->mbox); + rproc_del(rproc); k3_r5_reserved_mem_exit(kproc); -- 2.43.0