From patchwork Thu Jun 20 10:51:51 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chandrakanth Patil X-Patchwork-Id: 11006437 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D5CD81398 for ; Thu, 20 Jun 2019 10:52:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C658127528 for ; Thu, 20 Jun 2019 10:52:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BA18D28650; Thu, 20 Jun 2019 10:52:44 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A8EDF27528 for ; Thu, 20 Jun 2019 10:52:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726492AbfFTKwn (ORCPT ); Thu, 20 Jun 2019 06:52:43 -0400 Received: from mail-pf1-f196.google.com ([209.85.210.196]:42956 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726211AbfFTKwn (ORCPT ); Thu, 20 Jun 2019 06:52:43 -0400 Received: by mail-pf1-f196.google.com with SMTP id q10so1445774pff.9 for ; Thu, 20 Jun 2019 03:52:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=TgCgky6YIODK9Qkx2FukavRnGMLU1Hv4ZF/hfiUliTU=; b=JXM2NGrDmYl+yadi0p7R3ziMAAFRIPbLQ/j+eiHRvY46UAFbXzKzoqEYFg89TlYtNk 0QhGtGlpC8wTnQ7xKh/qjaek6RFWtXKRKJ1yYq1jdZwd4ANwyJtnGxjPYQ1NMGbZ+4OM Pv8SyzELuaCBJg4/SQvCJ3VgXRdPVka5XUtws= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=TgCgky6YIODK9Qkx2FukavRnGMLU1Hv4ZF/hfiUliTU=; b=KJHxtwyVQ0s6k391ErBuuoCGugu9f/OoBVkQY5aWkbXd+EDJ4YaQ+CWO4QoWCFSpj8 Sta18Zm5uYHF0deHQ8us6V0TFZ0fPxttPHh/xzecmtgTxmVF9S0EhrgLHAPRQHie3pwa Ero/yNVlu1NKAhMal5viR3q9JMDGyZjStJoR1c8mZJ7wqJhyB3bWPsgAW41ziyoxek9p JAqNFKOa4dZbxif4lXAr8T6stBnncO/p/KPlNMqUsAvIeDRqaoNtp+6HLAzguTgbDGS7 hapylq/rBSvGICiC0ldHdbKcbXsaKa4I4Z9nsaeLsguwXDdeM8TgVtVZW7f0thcrTbiM QmBQ== X-Gm-Message-State: APjAAAWjyCsEZP5ZPDJVFd89q7ZAMHTJQsr8O94F4HVnqzYT9MBOd4VI 9tAQVqqEKNtDfPleor4aRbhSVOZSjY3fL9Vi036hplZhXnu5pK1tC9iV7zQEjTuZyRlP9E4DJeQ U7WKhakBwT51entaiOXEhpMmNBumTzROIblead9C3W2xuX9ctdacH5QJNXtnLbuXm1QmWCK+Z7P 4DnxHrwyrz3fJaPEY= X-Google-Smtp-Source: APXvYqwMQfVyfwH1lI372Q3gotx1MIL1CTTWXOjsWzgEo2uedYRuLIBdSH5Rgd/bbXPC6BZ4yCffCw== X-Received: by 2002:a17:90a:db44:: with SMTP id u4mr2465934pjx.52.1561027961871; Thu, 20 Jun 2019 03:52:41 -0700 (PDT) Received: from dhcp-10-123-20-30.dhcp.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id l7sm24793995pfl.9.2019.06.20.03.52.39 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 20 Jun 2019 03:52:41 -0700 (PDT) From: Chandrakanth Patil To: linux-scsi@vger.kernel.org Cc: kashyap.desai@broadcom.com, sumit.saxena@broadcom.com, kiran-kumar.kasturi@broadcom.com, sankar.patra@broadcom.com, sasikumar.pc@broadcom.com, shivasharan.srikanteshwara@broadcom.com, Chandrakanth Patil Subject: [PATCH v2 01/18] megaraid_sas: Add 32 bit atomic descriptor support to AERO adapters Date: Thu, 20 Jun 2019 16:21:51 +0530 Message-Id: <20190620105208.15011-2-chandrakanth.patil@broadcom.com> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20190620105208.15011-1-chandrakanth.patil@broadcom.com> References: <20190620105208.15011-1-chandrakanth.patil@broadcom.com> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Aero adapters provides Atomic Request Descriptor as an alternative method for posting an entry onto a request queue. The posting of an Atomic Request Descriptor is an atomic operation, providing a safe mechanism for multiple processors on the host to post requests without synchronization. This Atomic Request Descriptor format is identical to first 32 bits of Default Request Descriptor and uses only 32 bits. If Aero adapters support Atomic descriptor, driver should use it for posting IOs and DCMDs to firmware. Signed-off-by: Sumit Saxena Signed-off-by: Chandrakanth Patil --- drivers/scsi/megaraid/megaraid_sas.h | 3 ++ drivers/scsi/megaraid/megaraid_sas_fusion.c | 45 +++++++++++++++++++++++------ 2 files changed, 39 insertions(+), 9 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h index e138d14..a08dd9c 100644 --- a/drivers/scsi/megaraid/megaraid_sas.h +++ b/drivers/scsi/megaraid/megaraid_sas.h @@ -1600,6 +1600,8 @@ enum FW_BOOT_CONTEXT { #define MR_CAN_HANDLE_SYNC_CACHE_OFFSET 0X01000000 +#define MR_ATOMIC_DESCRIPTOR_SUPPORT_OFFSET (1 << 24) + #define MR_CAN_HANDLE_64_BIT_DMA_OFFSET (1 << 25) #define MEGASAS_WATCHDOG_THREAD_INTERVAL 1000 @@ -2395,6 +2397,7 @@ struct megasas_instance { struct dentry *raidmap_dump; #endif u8 enable_fw_dev_list; + bool atomic_desc_support; }; struct MR_LD_VF_MAP { u32 size; diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index 8a7ac5c..4411408 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -277,21 +277,17 @@ inline void megasas_return_cmd_fusion(struct megasas_instance *instance, } /** - * megasas_fire_cmd_fusion - Sends command to the FW - * @instance: Adapter soft state - * @req_desc: 64bit Request descriptor - * - * Perform PCI Write. + * megasas_write_64bit_req_desc - PCI writes 64bit request descriptor + * @instance: Adapter soft state + * @req_desc: 64bit Request descriptor */ - static void -megasas_fire_cmd_fusion(struct megasas_instance *instance, +megasas_write_64bit_req_desc(struct megasas_instance *instance, union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc) { #if defined(writeq) && defined(CONFIG_64BIT) u64 req_data = (((u64)le32_to_cpu(req_desc->u.high) << 32) | le32_to_cpu(req_desc->u.low)); - writeq(req_data, &instance->reg_set->inbound_low_queue_port); #else unsigned long flags; @@ -305,6 +301,25 @@ megasas_fire_cmd_fusion(struct megasas_instance *instance, } /** + * megasas_fire_cmd_fusion - Sends command to the FW + * @instance: Adapter soft state + * @req_desc: 32bit or 64bit Request descriptor + * + * Perform PCI Write. AERO SERIES supports 32 bit Descriptor. + * Prior to AERO_SERIES support 64 bit Descriptor. + */ +static void +megasas_fire_cmd_fusion(struct megasas_instance *instance, + union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc) +{ + if (instance->atomic_desc_support) + writel(le32_to_cpu(req_desc->u.low), + &instance->reg_set->inbound_single_queue_port); + else + megasas_write_64bit_req_desc(instance, req_desc); +} + +/** * megasas_fusion_update_can_queue - Do all Adapter Queue depth related calculations here * @instance: Adapter soft state * fw_boot_context: Whether this function called during probe or after OCR @@ -1171,7 +1186,8 @@ megasas_ioc_init_fusion(struct megasas_instance *instance) break; } - megasas_fire_cmd_fusion(instance, &req_desc); + /* For AERO also, IOC_INIT requires 64 bit descriptor write */ + megasas_write_64bit_req_desc(instance, &req_desc); wait_and_poll(instance, cmd, MFI_IO_TIMEOUT_SECS); @@ -1181,6 +1197,17 @@ megasas_ioc_init_fusion(struct megasas_instance *instance) goto fail_fw_init; } + if (instance->adapter_type >= AERO_SERIES) { + scratch_pad_1 = megasas_readl + (instance, &instance->reg_set->outbound_scratch_pad_1); + + instance->atomic_desc_support = + (scratch_pad_1 & MR_ATOMIC_DESCRIPTOR_SUPPORT_OFFSET) ? 1 : 0; + + dev_info(&instance->pdev->dev, "FW supports atomic descriptor\t: %s\n", + instance->atomic_desc_support ? "Yes" : "No"); + } + return 0; fail_fw_init: