From patchwork Thu Mar 18 09:11:47 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: 12147639 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=-19.0 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 10124C433E6 for ; Thu, 18 Mar 2021 09:13:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CF4D764F3B for ; Thu, 18 Mar 2021 09:13:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229646AbhCRJM0 (ORCPT ); Thu, 18 Mar 2021 05:12:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42556 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229698AbhCRJMP (ORCPT ); Thu, 18 Mar 2021 05:12:15 -0400 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3D1C8C06174A for ; Thu, 18 Mar 2021 02:12:15 -0700 (PDT) Received: by mail-pl1-x62d.google.com with SMTP id e14so971253plj.2 for ; Thu, 18 Mar 2021 02:12:15 -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 :mime-version; bh=bZjkyZdXdUM3lDrp1fM7wN7uD1zP1IXTKlRDw8EGdFM=; b=gcPGFnp+y96uzeMBcszyiNAdqvSisyFQYN1ADnnat2PrWvW2rAyWz+cZJ/njzjZKX/ g8aiQ0KfcEnKawGwz3xEblZd7EAxFgmVVFYppr/QzUdXfWqKs8fysFee308jpV0Mb+0G 7zJ1mkLrbHjuayhtd3VCrT84aazKOvkKTgqQ4= 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=bZjkyZdXdUM3lDrp1fM7wN7uD1zP1IXTKlRDw8EGdFM=; b=DOoLc3Y91p/YuRgAPFeyEWm5JNq5m/cxqSyQmhY+66CyE8uS/dpjWF1Uaviq6GfNpx VdZFB8++tVE8aVC/yW/WTetOYM5Fh3/QONbDLRbY6lYLIOAq2sergFIzMcyIfObbcReZ 7LNE9g1FK7PWE1Lt+gdpVyM5VdFCz7tYyB0wEImjPEABeMOx+KxnQnmk/HgutQFOpBMS VTmAiY7uevAG46bldbZ+ctxv05K+C8/z7efDmOjhZOVfeO7Vu8lIVYHdH6fSDVtSgCno iin0HL7pQksLXCWKFdH3GhPk9ntKT6Tn8ohE6dCuCL/viYgIdSw30a3I5d2PBGe3gPwB lUAw== X-Gm-Message-State: AOAM5323I7cunpgGdawFu6hgJzZUr+Og1dv870Sgd+ue1A9E4CNLETdn 7hJGupRu5UPtyJpU9wlbFO37kkAlpEvlgJdca3pKNKae59RGXEIM4VkKHi2JqQpiJu8HHee+Xo2 hHL1Ugh7fYGFGWYFxcRlSZt7+CdZ95cFH/LZAMx0d0lJqSKGhNPs0y3SFe2MkB+Z1lR/apvPjcI gTdYJ49wWZSRunTe1BkdWP X-Google-Smtp-Source: ABdhPJxRLYLNMSiSw+1JkicWHqSjYzNaPOD5vtV2I3c2LGU+91p+AeGsLaEJsRXpNoBm0nKuxvkk1g== X-Received: by 2002:a17:902:d888:b029:e6:1ca1:d7f9 with SMTP id b8-20020a170902d888b02900e61ca1d7f9mr8804070plz.17.1616058734103; Thu, 18 Mar 2021 02:12:14 -0700 (PDT) Received: from dhcp-10-123-20-76.dhcp.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id 11sm1413350pgt.83.2021.03.18.02.12.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 Mar 2021 02:12:13 -0700 (PDT) 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 V2 3/7] mpt3sas: Handle sense buffer DMA allocations in same 4G region Date: Thu, 18 Mar 2021 14:41:47 +0530 Message-Id: <20210318091151.39349-4-suganath-prabu.subramani@broadcom.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210318091151.39349-1-suganath-prabu.subramani@broadcom.com> References: <20210318091151.39349-1-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 d3cadad..308d817 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,