From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
To: ulf.hansson@linaro.org, wsa+renesas@sang-engineering.com
Cc: linux-mmc@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Subject: [PATCH 2/3] mmc: tmio: No memory size limitation if runs on IOMMU
Date: Fri, 26 Apr 2019 14:18:49 +0900 [thread overview]
Message-ID: <1556255930-18188-3-git-send-email-yoshihiro.shimoda.uh@renesas.com> (raw)
In-Reply-To: <1556255930-18188-1-git-send-email-yoshihiro.shimoda.uh@renesas.com>
This patch adds a condition to avoid memory size limitaion of
swiotlb if the driver runs on IOMMU.
Tested-by: Takeshi Saito <takeshi.saito.xv@renesas.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
drivers/mmc/host/tmio_mmc_core.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
index 6019628..0474337 100644
--- a/drivers/mmc/host/tmio_mmc_core.c
+++ b/drivers/mmc/host/tmio_mmc_core.c
@@ -1203,9 +1203,10 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host)
* Since swiotlb has memory size limitation, this will calculate
* the maximum size locally (because we don't have any APIs for it now)
* and check the current max_req_size. And then, this will update
- * the max_req_size if needed as a workaround.
+ * the max_req_size if needed as a workaround. However, if the driver
+ * runs on IOMMU, this workaround doesn't need.
*/
- if (swiotlb_max_segment()) {
+ if (swiotlb_max_segment() && !pdev->dev.iommu_group) {
unsigned int max_size = (1 << IO_TLB_SHIFT) * IO_TLB_SEGSIZE;
if (mmc->max_req_size > max_size)
--
2.7.4
next prev parent reply other threads:[~2019-04-26 5:23 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-26 5:18 [PATCH 0/3] mmc: renesas_sdhi_internal_dmac: improve performance by using IOMMU Yoshihiro Shimoda
2019-04-26 5:18 ` [PATCH 1/3] mmc: tmio: add init_card ops Yoshihiro Shimoda
2019-04-26 9:15 ` Wolfram Sang
2019-04-26 9:45 ` Simon Horman
2019-04-26 9:56 ` Wolfram Sang
2019-04-26 10:17 ` Simon Horman
2019-04-26 5:18 ` Yoshihiro Shimoda [this message]
2019-04-26 8:09 ` [PATCH 2/3] mmc: tmio: No memory size limitation if runs on IOMMU Sergei Shtylyov
2019-04-26 9:17 ` Wolfram Sang
2019-05-07 7:13 ` Yoshihiro Shimoda
2019-04-26 9:45 ` Simon Horman
2019-04-26 5:18 ` [PATCH 3/3] mmc: renesas_sdhi_internal_dmac: use multiple segments if possible Yoshihiro Shimoda
2019-04-26 9:37 ` Wolfram Sang
2019-05-07 7:27 ` Yoshihiro Shimoda
2019-04-26 9:45 ` Simon Horman
2019-04-26 9:46 ` [PATCH 0/3] mmc: renesas_sdhi_internal_dmac: improve performance by using IOMMU Wolfram Sang
2019-05-07 8:58 ` Yoshihiro Shimoda
2019-05-08 4:28 ` Yoshihiro Shimoda
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