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5e4288dd.7fb1f267cc00-smtp-out-n03; Tue, 11 Feb 2020 10:58:37 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 22439C4479D; Tue, 11 Feb 2020 10:58:36 +0000 (UTC) Received: from [10.206.25.140] (blr-c-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: vbadigan) by smtp.codeaurora.org (Postfix) with ESMTPSA id 09444C447A6; Tue, 11 Feb 2020 10:58:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 09444C447A6 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=vbadigan@codeaurora.org Subject: Re: [PATCH V1] mmc: mmc_test: Pass different sg lists for non-blocking requests To: ulf.hansson@linaro.org, adrian.hunter@intel.com Cc: asutoshd@codeaurora.org, stummala@codeaurora.org, sayalil@codeaurora.org, cang@codeaurora.org, rampraka@codeaurora.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Greg Kroah-Hartman , Allison Randal , Thomas Gleixner , Doug Anderson , saiprakash.ranjan@codeaurora.org References: <1581413771-18005-1-git-send-email-vbadigan@codeaurora.org> From: Veerabhadrarao Badiganti Message-ID: Date: Tue, 11 Feb 2020 16:28:23 +0530 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.4.2 MIME-Version: 1.0 In-Reply-To: <1581413771-18005-1-git-send-email-vbadigan@codeaurora.org> Content-Type: multipart/mixed; boundary="------------E39CC8AF431D684C76CEC115" Content-Language: en-US Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org This is a multi-part message in MIME format. --------------E39CC8AF431D684C76CEC115 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Attaching the full error log On 2/11/2020 3:06 PM, Veerabhadrarao Badiganti wrote: > Supply a separate sg list for each of the request in non-blocking > IO test cases where two requests will be issued at same time. > > Otherwise, sg memory may get unmapped when a request is done while > same memory is being accessed by controller from the other request, > and it leads to iommu errors with below call stack: > > __arm_lpae_unmap+0x2e0/0x478 > arm_lpae_unmap+0x54/0x70 > arm_smmu_unmap+0x64/0xa4 > __iommu_unmap+0xb8/0x1f0 > iommu_unmap_fast+0x38/0x48 > __iommu_dma_unmap+0x88/0x108 > iommu_dma_unmap_sg+0x90/0xa4 > sdhci_post_req+0x5c/0x78 > mmc_test_start_areq+0x10c/0x120 [mmc_test] > mmc_test_area_io_seq+0x150/0x264 [mmc_test] > mmc_test_rw_multiple+0x174/0x1c0 [mmc_test] > mmc_test_rw_multiple_sg_len+0x44/0x6c [mmc_test] > mmc_test_profile_sglen_wr_nonblock_perf+0x6c/0x94 [mmc_test] > mtf_test_write+0x238/0x3cc [mmc_test] > > Signed-off-by: Veerabhadrarao Badiganti > --- > drivers/mmc/core/mmc_test.c | 38 ++++++++++++++++++++++++++++++++------ > 1 file changed, 32 insertions(+), 6 deletions(-) > > diff --git a/drivers/mmc/core/mmc_test.c b/drivers/mmc/core/mmc_test.c > index 492dd45..69bdf60 100644 > --- a/drivers/mmc/core/mmc_test.c > +++ b/drivers/mmc/core/mmc_test.c > @@ -71,6 +71,7 @@ struct mmc_test_mem { > * @sg_len: length of currently mapped scatterlist @sg > * @mem: allocated memory > * @sg: scatterlist > + * @sg_areq: scatterlist for non blocking request > */ > struct mmc_test_area { > unsigned long max_sz; > @@ -82,6 +83,7 @@ struct mmc_test_area { > unsigned int sg_len; > struct mmc_test_mem *mem; > struct scatterlist *sg; > + struct scatterlist *sg_areq; > }; > > /** > @@ -836,7 +838,9 @@ static int mmc_test_start_areq(struct mmc_test_card *test, > } > > static int mmc_test_nonblock_transfer(struct mmc_test_card *test, > - struct scatterlist *sg, unsigned sg_len, > + struct scatterlist *sg, > + struct scatterlist *sg_areq, > + unsigned int sg_len, > unsigned dev_addr, unsigned blocks, > unsigned blksz, int write, int count) > { > @@ -867,6 +871,7 @@ static int mmc_test_nonblock_transfer(struct mmc_test_card *test, > prev_mrq = &rq2->mrq; > > swap(mrq, prev_mrq); > + swap(sg, sg_areq); > dev_addr += blocks; > } > > @@ -1396,7 +1401,7 @@ static int mmc_test_no_highmem(struct mmc_test_card *test) > * Map sz bytes so that it can be transferred. > */ > static int mmc_test_area_map(struct mmc_test_card *test, unsigned long sz, > - int max_scatter, int min_sg_len) > + int max_scatter, int min_sg_len, bool nonblock) > { > struct mmc_test_area *t = &test->area; > int err; > @@ -1411,6 +1416,20 @@ static int mmc_test_area_map(struct mmc_test_card *test, unsigned long sz, > err = mmc_test_map_sg(t->mem, sz, t->sg, 1, t->max_segs, > t->max_seg_sz, &t->sg_len, min_sg_len); > } > + > + if (err || !nonblock) > + goto err; > + > + if (max_scatter) { > + err = mmc_test_map_sg_max_scatter(t->mem, sz, t->sg_areq, > + t->max_segs, t->max_seg_sz, > + &t->sg_len); > + } else { > + err = mmc_test_map_sg(t->mem, sz, t->sg_areq, 1, t->max_segs, > + t->max_seg_sz, &t->sg_len, min_sg_len); > + } > + > +err: > if (err) > pr_info("%s: Failed to map sg list\n", > mmc_hostname(test->card->host)); > @@ -1458,15 +1477,16 @@ static int mmc_test_area_io_seq(struct mmc_test_card *test, unsigned long sz, > sz = max_tfr; > } > > - ret = mmc_test_area_map(test, sz, max_scatter, min_sg_len); > + ret = mmc_test_area_map(test, sz, max_scatter, min_sg_len, nonblock); > if (ret) > return ret; > > if (timed) > ktime_get_ts64(&ts1); > if (nonblock) > - ret = mmc_test_nonblock_transfer(test, t->sg, t->sg_len, > - dev_addr, t->blocks, 512, write, count); > + ret = mmc_test_nonblock_transfer(test, t->sg, t->sg_areq, > + t->sg_len, dev_addr, t->blocks, 512, write, > + count); > else > for (i = 0; i < count && ret == 0; i++) { > ret = mmc_test_area_transfer(test, dev_addr, write); > @@ -1584,6 +1604,12 @@ static int mmc_test_area_init(struct mmc_test_card *test, int erase, int fill) > goto out_free; > } > > + t->sg_areq = kmalloc_array(t->max_segs, sizeof(*t->sg), GFP_KERNEL); > + if (!t->sg_areq) { > + ret = -ENOMEM; > + goto out_free; > + } > + > t->dev_addr = mmc_test_capacity(test->card) / 2; > t->dev_addr -= t->dev_addr % (t->max_sz >> 9); > > @@ -2468,7 +2494,7 @@ static int __mmc_test_cmds_during_tfr(struct mmc_test_card *test, > if (!(test->card->host->caps & MMC_CAP_CMD_DURING_TFR)) > return RESULT_UNSUP_HOST; > > - ret = mmc_test_area_map(test, sz, 0, 0); > + ret = mmc_test_area_map(test, sz, 0, 0, use_areq); > if (ret) > return ret; > --------------E39CC8AF431D684C76CEC115 Content-Type: text/plain; charset=UTF-8; name="mmc_test_areq_iommu_error.txt" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="mmc_test_areq_iommu_error.txt" WyAgIDU3LjMxNDUzOV0gbW1jMTogVGVzdCBjYXNlIDQyLiBXcml0ZSBwZXJmb3JtYW5jZSBu 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