From patchwork Thu Nov 10 01:50:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "lihuisong (C)" X-Patchwork-Id: 13038234 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DBA57C433FE for ; Thu, 10 Nov 2022 01:52:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232253AbiKJBwv (ORCPT ); Wed, 9 Nov 2022 20:52:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47898 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231830AbiKJBwu (ORCPT ); Wed, 9 Nov 2022 20:52:50 -0500 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 35B4AB497; Wed, 9 Nov 2022 17:52:49 -0800 (PST) Received: from dggemv704-chm.china.huawei.com (unknown [172.30.72.53]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4N74WQ34YlzpWKF; Thu, 10 Nov 2022 09:49:06 +0800 (CST) Received: from kwepemm600004.china.huawei.com (7.193.23.242) by dggemv704-chm.china.huawei.com (10.3.19.47) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Thu, 10 Nov 2022 09:52:47 +0800 Received: from localhost.localdomain (10.28.79.22) by kwepemm600004.china.huawei.com (7.193.23.242) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Thu, 10 Nov 2022 09:52:46 +0800 From: Huisong Li To: , CC: , , , , , , , , , , , Subject: [PATCH 1/3] mailbox: pcc: rename platform interrupt bit macro name Date: Thu, 10 Nov 2022 09:50:32 +0800 Message-ID: <20221110015034.7943-2-lihuisong@huawei.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20221110015034.7943-1-lihuisong@huawei.com> References: <20221110015034.7943-1-lihuisong@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.28.79.22] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemm600004.china.huawei.com (7.193.23.242) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Currently, the name of platform interrupt bit macro, ACPI_PCCT_DOORBELL, is not very appropriate. The doorbell is generally considered as an action when send mailbox data. Actually, the macro value comes from Platform Interrupt in Platform Communications Channel Global Flags. If the bit is '1', it means that the platform is capable of generating an interrupt to indicate completion of a command. Signed-off-by: Huisong Li --- drivers/mailbox/pcc.c | 2 +- include/acpi/actbl2.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c index 3c2bc0ca454c..7cee37dd3b73 100644 --- a/drivers/mailbox/pcc.c +++ b/drivers/mailbox/pcc.c @@ -665,7 +665,7 @@ static int pcc_mbox_probe(struct platform_device *pdev) (unsigned long) pcct_tbl + sizeof(struct acpi_table_pcct)); acpi_pcct_tbl = (struct acpi_table_pcct *) pcct_tbl; - if (acpi_pcct_tbl->flags & ACPI_PCCT_DOORBELL) + if (acpi_pcct_tbl->flags & BIT(ACPI_PCCT_FLAGS_PLAT_INTERRUPT_B)) pcc_mbox_ctrl->txdone_irq = true; for (i = 0; i < count; i++) { diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h index 655102bc6d14..3840507fdc79 100644 --- a/include/acpi/actbl2.h +++ b/include/acpi/actbl2.h @@ -1810,7 +1810,7 @@ struct acpi_table_pcct { /* Values for Flags field above */ -#define ACPI_PCCT_DOORBELL 1 +#define ACPI_PCCT_FLAGS_PLAT_INTERRUPT_B 1 /* Values for subtable type in struct acpi_subtable_header */ From patchwork Thu Nov 10 01:50:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "lihuisong (C)" X-Patchwork-Id: 13038236 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7A3D1C43219 for ; Thu, 10 Nov 2022 01:52:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231666AbiKJBwx (ORCPT ); Wed, 9 Nov 2022 20:52:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47908 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232093AbiKJBwu (ORCPT ); Wed, 9 Nov 2022 20:52:50 -0500 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4223BC1D; Wed, 9 Nov 2022 17:52:49 -0800 (PST) Received: from dggemv703-chm.china.huawei.com (unknown [172.30.72.56]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4N74WQ6lFczpWLN; Thu, 10 Nov 2022 09:49:06 +0800 (CST) Received: from kwepemm600004.china.huawei.com (7.193.23.242) by dggemv703-chm.china.huawei.com (10.3.19.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Thu, 10 Nov 2022 09:52:48 +0800 Received: from localhost.localdomain (10.28.79.22) by kwepemm600004.china.huawei.com (7.193.23.242) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Thu, 10 Nov 2022 09:52:47 +0800 From: Huisong Li To: , CC: , , , , , , , , , , , Subject: [PATCH 2/3] ACPI: PCC: add check for platform interrupt Date: Thu, 10 Nov 2022 09:50:33 +0800 Message-ID: <20221110015034.7943-3-lihuisong@huawei.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20221110015034.7943-1-lihuisong@huawei.com> References: <20221110015034.7943-1-lihuisong@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.28.79.22] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemm600004.china.huawei.com (7.193.23.242) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org PCC Operation Region driver senses the completion of command by interrupt way. If platform can not generate an interrupt when a command complete, the caller never gets the desired result. So let's reject the setup of the PCC address space on platform that do not support interrupt mode. Signed-off-by: Huisong Li --- drivers/acpi/acpi_pcc.c | 47 +++++++++++++++++++++++++---------------- 1 file changed, 29 insertions(+), 18 deletions(-) diff --git a/drivers/acpi/acpi_pcc.c b/drivers/acpi/acpi_pcc.c index 3e252be047b8..8efd08e469aa 100644 --- a/drivers/acpi/acpi_pcc.c +++ b/drivers/acpi/acpi_pcc.c @@ -53,6 +53,7 @@ acpi_pcc_address_space_setup(acpi_handle region_handle, u32 function, struct pcc_data *data; struct acpi_pcc_info *ctx = handler_context; struct pcc_mbox_chan *pcc_chan; + static acpi_status ret; data = kzalloc(sizeof(*data), GFP_KERNEL); if (!data) @@ -69,23 +70,35 @@ acpi_pcc_address_space_setup(acpi_handle region_handle, u32 function, if (IS_ERR(data->pcc_chan)) { pr_err("Failed to find PCC channel for subspace %d\n", ctx->subspace_id); - kfree(data); - return AE_NOT_FOUND; + ret = AE_NOT_FOUND; + goto request_channel_fail; } pcc_chan = data->pcc_chan; + if (!pcc_chan->mchan->mbox->txdone_irq) { + pr_err("This channel-%d does not support interrupt.\n", + ctx->subspace_id); + ret = AE_SUPPORT; + goto request_channel_fail; + } data->pcc_comm_addr = acpi_os_ioremap(pcc_chan->shmem_base_addr, pcc_chan->shmem_size); if (!data->pcc_comm_addr) { pr_err("Failed to ioremap PCC comm region mem for %d\n", ctx->subspace_id); - pcc_mbox_free_channel(data->pcc_chan); - kfree(data); - return AE_NO_MEMORY; + ret = AE_NO_MEMORY; + goto ioremap_fail; } *region_context = data; return AE_OK; + +ioremap_fail: + pcc_mbox_free_channel(data->pcc_chan); +request_channel_fail: + kfree(data); + + return ret; } static acpi_status @@ -106,19 +119,17 @@ acpi_pcc_address_space_handler(u32 function, acpi_physical_address addr, if (ret < 0) return AE_ERROR; - if (data->pcc_chan->mchan->mbox->txdone_irq) { - /* - * pcc_chan->latency is just a Nominal value. In reality the remote - * processor could be much slower to reply. So add an arbitrary - * amount of wait on top of Nominal. - */ - usecs_lat = PCC_CMD_WAIT_RETRIES_NUM * data->pcc_chan->latency; - ret = wait_for_completion_timeout(&data->done, - usecs_to_jiffies(usecs_lat)); - if (ret == 0) { - pr_err("PCC command executed timeout!\n"); - return AE_TIME; - } + /* + * pcc_chan->latency is just a Nominal value. In reality the remote + * processor could be much slower to reply. So add an arbitrary + * amount of wait on top of Nominal. + */ + usecs_lat = PCC_CMD_WAIT_RETRIES_NUM * data->pcc_chan->latency; + ret = wait_for_completion_timeout(&data->done, + usecs_to_jiffies(usecs_lat)); + if (ret == 0) { + pr_err("PCC command executed timeout!\n"); + return AE_TIME; } mbox_chan_txdone(data->pcc_chan->mchan, ret); From patchwork Thu Nov 10 01:50:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "lihuisong (C)" X-Patchwork-Id: 13038235 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 242B0C43217 for ; Thu, 10 Nov 2022 01:52:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231966AbiKJBww (ORCPT ); Wed, 9 Nov 2022 20:52:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47910 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232142AbiKJBwu (ORCPT ); Wed, 9 Nov 2022 20:52:50 -0500 Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 136ADBC85; Wed, 9 Nov 2022 17:52:50 -0800 (PST) Received: from dggemv703-chm.china.huawei.com (unknown [172.30.72.57]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4N74XB2WGqzJnZL; Thu, 10 Nov 2022 09:49:46 +0800 (CST) Received: from kwepemm600004.china.huawei.com (7.193.23.242) by dggemv703-chm.china.huawei.com (10.3.19.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Thu, 10 Nov 2022 09:52:48 +0800 Received: from localhost.localdomain (10.28.79.22) by kwepemm600004.china.huawei.com (7.193.23.242) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Thu, 10 Nov 2022 09:52:47 +0800 From: Huisong Li To: , CC: , , , , , , , , , , , Subject: [PATCH 3/3] mailbox: pcc: fix 'pcc_chan_count' when fail to initialize PCC Date: Thu, 10 Nov 2022 09:50:34 +0800 Message-ID: <20221110015034.7943-4-lihuisong@huawei.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20221110015034.7943-1-lihuisong@huawei.com> References: <20221110015034.7943-1-lihuisong@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.28.79.22] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemm600004.china.huawei.com (7.193.23.242) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Currently, 'pcc_chan_count' is a non-zero value if PCC subspaces are parsed successfully and subsequent processes is failure during initializing PCC process. This may cause that pcc_mbox_request_channel() can still be executed successfully , which will misleads the caller that this channel is available. Fixes: ce028702ddbc ("mailbox: pcc: Move bulk of PCCT parsing into pcc_mbox_probe") Signed-off-by: Huisong Li --- drivers/mailbox/pcc.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c index 7cee37dd3b73..47d70c5884e3 100644 --- a/drivers/mailbox/pcc.c +++ b/drivers/mailbox/pcc.c @@ -294,6 +294,7 @@ pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id) pr_err("Channel not found for idx: %d\n", subspace_id); return ERR_PTR(-EBUSY); } + dev = chan->mbox->dev; spin_lock_irqsave(&chan->lock, flags); @@ -735,7 +736,8 @@ static int __init pcc_init(void) if (ret) { pr_debug("ACPI PCC probe failed.\n"); - return -ENODEV; + ret = -ENODEV; + goto out; } pcc_pdev = platform_create_bundle(&pcc_mbox_driver, @@ -743,10 +745,13 @@ static int __init pcc_init(void) if (IS_ERR(pcc_pdev)) { pr_debug("Err creating PCC platform bundle\n"); - return PTR_ERR(pcc_pdev); + ret = PTR_ERR(pcc_pdev); + goto out; } - return 0; +out: + pcc_chan_count = 0; + return ret; } /*