From patchwork Fri Mar 5 10:29:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suganath Prabu S X-Patchwork-Id: 12118297 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 62D12C433E9 for ; Fri, 5 Mar 2021 10:30:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 343136501C for ; Fri, 5 Mar 2021 10:30:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229792AbhCEK3z (ORCPT ); Fri, 5 Mar 2021 05:29:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39506 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229794AbhCEK3p (ORCPT ); Fri, 5 Mar 2021 05:29:45 -0500 Received: from mail-pg1-x532.google.com (mail-pg1-x532.google.com [IPv6:2607:f8b0:4864:20::532]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CD998C061574 for ; Fri, 5 Mar 2021 02:29:44 -0800 (PST) Received: by mail-pg1-x532.google.com with SMTP id o38so1065896pgm.9 for ; Fri, 05 Mar 2021 02:29:44 -0800 (PST) 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 :mime-version; bh=QlDCmz60ofp9RCmKCauRTokLb/3jsJvSHrEdUaJK3MA=; b=YxbPElj+2+BIP3VCr86GbT5PR8G8ub+8WheGxZMatTeEHrTe9rCx567tg0JAW9HpHq uZ41koWTWA0G35XFyvpOJb0L+fqTeAEYhdHOrvjocS0Z4EHzxbNeRdJ0XwrHXL4x6MKa AdofRuZYsWiVKUoyJOskLL97RbWR0SLoX+UZA= 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:mime-version; bh=QlDCmz60ofp9RCmKCauRTokLb/3jsJvSHrEdUaJK3MA=; b=c0/BF5j2plO5rceYLDl/RBbICbChza/w7UKpqfraACoZ1dVqI5UYtkYBRRLEmAH7tu EACwa83RkDPTS+th7I7QOLyiZM/on9VOwb8lnPtOa9vIQNJlPnZ88d6jhKAhcjXQyPUx 6XnCOmZMyASy6T/uSoYHc+qZqC9sVv1u3Lw9+94o4jNdhQQN/SESa8su1ic2vS0EuxeX 4kiHPaVh+M6uNaD3Z5p7kqR9gbhgVvcxS4tkhKfYyByyCRetycy8QZwWCZxn7BcfXY1s 7V9bSvfZSGCof2LrLeqNuqMaRcixQfChmkvCfLGXaym3d5uhTP4+brUB3z81j7Ybssze afSw== X-Gm-Message-State: AOAM531PnseFHX2eBiJF1hUAqe7/CoJWW6KzZLThaTW5vNUpza3CCI/x 8EeX105tMsAiiOaEngEVKZN/XIE+S9cz+yYdZEogbmFYf3Q+9UN9mUJ1zFw+Y8IlTHKG8e8SE+E vSt5A+6V3cDBowVzAOpQCB3gAq5NSqkP25qUGWwCHc1tyrdKxKQvclbMBaNMmK0PrXXaQ019Pdq hTHkPp2CqmBLY/+8d6Bbof X-Google-Smtp-Source: ABdhPJypNdQCRlpAyVR3L7PYjetVUTjCoYEr5KtPxzN9ZE9AuG2iuVM6ZoQAKqFxYFZZWXXzuU0Mzw== X-Received: by 2002:a63:d618:: with SMTP id q24mr7711793pgg.283.1614940183420; Fri, 05 Mar 2021 02:29:43 -0800 (PST) Received: from dhcp-10-123-20-76.dhcp.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id v15sm2015983pgl.44.2021.03.05.02.29.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Mar 2021 02:29:42 -0800 (PST) From: Suganath Prabu S To: linux-scsi@vger.kernel.org, martin.petersen@oracle.com Cc: Sathya.Prakash@broadcom.com, sreekanth.reddy@broadcom.com, Suganath Prabu S Subject: [PATCH 3/7] mpt3sas: Handle sense buffer DMA allocations in same 4G region Date: Fri, 5 Mar 2021 15:59:00 +0530 Message-Id: <20210305102904.7560-4-suganath-prabu.subramani@broadcom.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210305102904.7560-1-suganath-prabu.subramani@broadcom.com> References: <20210305102904.7560-1-suganath-prabu.subramani@broadcom.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org According to MPI Specification Sense buffers should not cross 4GB boundary. So while allocating Sense buffers, if any buffer crosses the 4GB boundary then, * Release the already allocated memory pools and * Reallocate them by changing the DMA coherent mask to 32 bit. Signed-off-by: Suganath Prabu S --- drivers/scsi/mpt3sas/mpt3sas_base.c | 86 ++++++++++++++--------------- 1 file changed, 40 insertions(+), 46 deletions(-) diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c index 7542f7a..6ef4925 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.c +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c @@ -5527,6 +5527,38 @@ _base_allocate_chain_dma_pool(struct MPT3SAS_ADAPTER *ioc, u32 sz) return 0; } +/** + * _base_allocate_sense_dma_pool - Allocating DMA'able memory + * for sense dma pool. + * @ioc: Adapter object + * @sz: DMA Pool size + * Return: 0 for success, non-zero for failure. + */ +static int +_base_allocate_sense_dma_pool(struct MPT3SAS_ADAPTER *ioc, u32 sz) +{ + ioc->sense_dma_pool = + dma_pool_create("sense pool", &ioc->pdev->dev, sz, 4, 0); + if (!ioc->sense_dma_pool) + return -ENOMEM; + ioc->sense = dma_pool_alloc(ioc->sense_dma_pool, + GFP_KERNEL, &ioc->sense_dma); + if (!ioc->sense) + return -EAGAIN; + if (!mpt3sas_check_same_4gb_region((long)ioc->sense, sz)) { + dinitprintk(ioc, pr_err( + "Bad Sense Pool! sense (0x%p) sense_dma = (0x%llx)\n", + ioc->sense, (unsigned long long) ioc->sense_dma)); + ioc->use_32bit_dma = true; + return -EAGAIN; + } + ioc_info(ioc, + "sense pool(0x%p) - dma(0x%llx): depth(%d), element_size(%d), pool_size (%d kB)\n", + ioc->sense, (unsigned long long)ioc->sense_dma, + ioc->scsiio_depth, SCSI_SENSE_BUFFERSIZE, sz/1024); + return 0; +} + /** * base_alloc_rdpq_dma_pool - Allocating DMA'able memory * for reply queues. @@ -5620,7 +5652,7 @@ _base_allocate_memory_pools(struct MPT3SAS_ADAPTER *ioc) u16 chains_needed_per_io; u32 sz, total_sz, reply_post_free_sz, reply_post_free_array_sz; u32 retry_sz; - u32 rdpq_sz = 0; + u32 rdpq_sz = 0, sense_sz = 0; u16 max_request_credit, nvme_blocks_needed; unsigned short sg_tablesize; u16 sge_size; @@ -5963,58 +5995,20 @@ _base_allocate_memory_pools(struct MPT3SAS_ADAPTER *ioc) ioc_info(ioc, "chain pool depth(%d), frame_size(%d), pool_size(%d kB)\n", ioc->chain_depth, ioc->chain_segment_sz, (ioc->chain_depth * ioc->chain_segment_sz) / 1024)); - /* sense buffers, 4 byte align */ - sz = ioc->scsiio_depth * SCSI_SENSE_BUFFERSIZE; - ioc->sense_dma_pool = dma_pool_create("sense pool", &ioc->pdev->dev, sz, - 4, 0); - if (!ioc->sense_dma_pool) { - ioc_err(ioc, "sense pool: dma_pool_create failed\n"); - goto out; - } - ioc->sense = dma_pool_alloc(ioc->sense_dma_pool, GFP_KERNEL, - &ioc->sense_dma); - if (!ioc->sense) { - ioc_err(ioc, "sense pool: dma_pool_alloc failed\n"); - goto out; - } - /* sense buffer requires to be in same 4 gb region. - * Below function will check the same. - * In case of failure, new pci pool will be created with updated - * alignment. Older allocation and pool will be destroyed. - * Alignment will be used such a way that next allocation if - * success, will always meet same 4gb region requirement. - * Actual requirement is not alignment, but we need start and end of - * DMA address must have same upper 32 bit address. - */ - if (!mpt3sas_check_same_4gb_region((long)ioc->sense, sz)) { - //Release Sense pool & Reallocate - dma_pool_free(ioc->sense_dma_pool, ioc->sense, ioc->sense_dma); - dma_pool_destroy(ioc->sense_dma_pool); - ioc->sense = NULL; - - ioc->sense_dma_pool = - dma_pool_create("sense pool", &ioc->pdev->dev, sz, - roundup_pow_of_two(sz), 0); - if (!ioc->sense_dma_pool) { - ioc_err(ioc, "sense pool: pci_pool_create failed\n"); - goto out; - } - ioc->sense = dma_pool_alloc(ioc->sense_dma_pool, GFP_KERNEL, - &ioc->sense_dma); - if (!ioc->sense) { - ioc_err(ioc, "sense pool: pci_pool_alloc failed\n"); - goto out; - } - } + sense_sz = ioc->scsiio_depth * SCSI_SENSE_BUFFERSIZE; + rc = _base_allocate_sense_dma_pool(ioc, sense_sz); + if (rc == -ENOMEM) + return -ENOMEM; + else if (rc == -EAGAIN) + goto try_32bit_dma; + total_sz += sense_sz; ioc_info(ioc, "sense pool(0x%p)- dma(0x%llx): depth(%d)," "element_size(%d), pool_size(%d kB)\n", ioc->sense, (unsigned long long)ioc->sense_dma, ioc->scsiio_depth, SCSI_SENSE_BUFFERSIZE, sz / 1024); - total_sz += sz; - /* reply pool, 4 byte align */ sz = ioc->reply_free_queue_depth * ioc->reply_sz; ioc->reply_dma_pool = dma_pool_create("reply pool", &ioc->pdev->dev, sz,