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mmc: mmc_test: Pass different sg lists for non-blocking requests

Browse source 
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 <vbadigan@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/1582714668-17247-1-git-send-email-vbadigan@codeaurora.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Veerabhadrarao Badiganti 2020-02-26 16:27:43 +05:30 committed by Ulf Hansson
parent d79100c91a
commit ea21e9b2b3
1 changed files with 40 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

52
drivers/mmc/core/mmc_test.c
View file

@ -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;
};
/**
@ -836,14 +838,16 @@ 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,
unsigned dev_addr, unsigned blocks,
unsigned blksz, int write, int count)
unsigned int dev_addr, int write,
int count)
{
struct mmc_test_req *rq1, *rq2;
struct mmc_request *mrq, *prev_mrq;
int i;
int ret = RESULT_OK;
struct mmc_test_area *t = &test->area;
struct scatterlist *sg = t->sg;
struct scatterlist *sg_areq = t->sg_areq;
rq1 = mmc_test_req_alloc();
rq2 = mmc_test_req_alloc();
@ -857,8 +861,8 @@ static int mmc_test_nonblock_transfer(struct mmc_test_card *test,
for (i = 0; i < count; i++) {
mmc_test_req_reset(container_of(mrq, struct mmc_test_req, mrq));
mmc_test_prepare_mrq(test, mrq, sg, sg_len, dev_addr, blocks,
blksz, write);
mmc_test_prepare_mrq(test, mrq, sg, t->sg_len, dev_addr,
t->blocks, 512, write);
ret = mmc_test_start_areq(test, mrq, prev_mrq);
if (ret)
goto err;
@ -867,7 +871,8 @@ static int mmc_test_nonblock_transfer(struct mmc_test_card *test,
prev_mrq = &rq2->mrq;
swap(mrq, prev_mrq);
dev_addr += blocks;
swap(sg, sg_areq);
dev_addr += t->blocks;
}
ret = mmc_test_start_areq(test, NULL, prev_mrq);
@ -1396,10 +1401,11 @@ 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;
unsigned int sg_len = 0;
t->blocks = sz >> 9;
@ -1411,6 +1417,22 @@ 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,
&sg_len);
} else {
err = mmc_test_map_sg(t->mem, sz, t->sg_areq, 1, t->max_segs,
t->max_seg_sz, &sg_len, min_sg_len);
}
if (!err && sg_len != t->sg_len)
err = -EINVAL;
err:
if (err)
pr_info("%s: Failed to map sg list\n",
mmc_hostname(test->card->host));
@ -1440,7 +1462,6 @@ static int mmc_test_area_io_seq(struct mmc_test_card *test, unsigned long sz,
struct timespec64 ts1, ts2;
int ret = 0;
int i;
struct mmc_test_area *t = &test->area;
/*
* In the case of a maximally scattered transfer, the maximum transfer
@ -1458,15 +1479,14 @@ 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, dev_addr, write, count);
else
for (i = 0; i < count && ret == 0; i++) {
ret = mmc_test_area_transfer(test, dev_addr, write);
@ -1525,6 +1545,7 @@ static int mmc_test_area_cleanup(struct mmc_test_card *test)
struct mmc_test_area *t = &test->area;
kfree(t->sg);
kfree(t->sg_areq);
mmc_test_free_mem(t->mem);
return 0;
@ -1584,6 +1605,13 @@ 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_areq),
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 +2496,7 @@ 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;