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Subject[RFC PATCH 7/7] mmc: host: sdhci-sprd: Add MMC packed request support
Date
Enable the ADMA3 transfer mode as well as adding packed operations
to support MMC packed requests to improve IO performance.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
---
drivers/mmc/host/Kconfig | 1 +
drivers/mmc/host/sdhci-sprd.c | 22 ++++++++++++++++++++--
2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 14d89a1..44ea3cc 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -619,6 +619,7 @@ config MMC_SDHCI_SPRD
depends on ARCH_SPRD
depends on MMC_SDHCI_PLTFM
select MMC_SDHCI_IO_ACCESSORS
+ select MMC_PACKED
help
This selects the SDIO Host Controller in Spreadtrum
SoCs, this driver supports R11(IP version: R11P0).
diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c
index 80a9055..e5651fd 100644
--- a/drivers/mmc/host/sdhci-sprd.c
+++ b/drivers/mmc/host/sdhci-sprd.c
@@ -524,10 +524,18 @@ static void sdhci_sprd_phy_param_parse(struct sdhci_sprd_host *sprd_host,
static const struct sdhci_pltfm_data sdhci_sprd_pdata = {
.quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK,
.quirks2 = SDHCI_QUIRK2_BROKEN_HS200 |
- SDHCI_QUIRK2_USE_32BIT_BLK_CNT,
+ SDHCI_QUIRK2_USE_32BIT_BLK_CNT |
+ SDHCI_QUIRK2_USE_ADMA3_SUPPORT,
.ops = &sdhci_sprd_ops,
};

+static const struct mmc_packed_ops packed_ops = {
+ .packed_algo = mmc_packed_algo_rw,
+ .prepare_hardware = sdhci_prepare_packed,
+ .unprepare_hardware = sdhci_unprepare_packed,
+ .packed_request = sdhci_packed_request,
+};
+
static int sdhci_sprd_probe(struct platform_device *pdev)
{
struct sdhci_host *host;
@@ -642,10 +650,14 @@ static int sdhci_sprd_probe(struct platform_device *pdev)

sprd_host->flags = host->flags;

- ret = __sdhci_add_host(host);
+ ret = mmc_packed_init(host->mmc, &packed_ops, 10);
if (ret)
goto err_cleanup_host;

+ ret = __sdhci_add_host(host);
+ if (ret)
+ goto err_packed;
+
pm_runtime_mark_last_busy(&pdev->dev);
pm_runtime_put_autosuspend(&pdev->dev);

@@ -653,6 +665,9 @@ static int sdhci_sprd_probe(struct platform_device *pdev)
__func__, host->version);
return 0;

+err_packed:
+ mmc_packed_exit(host->mmc);
+
err_cleanup_host:
sdhci_cleanup_host(host);

@@ -680,6 +695,7 @@ static int sdhci_sprd_remove(struct platform_device *pdev)
struct sdhci_sprd_host *sprd_host = TO_SPRD_HOST(host);
struct mmc_host *mmc = host->mmc;

+ mmc_packed_exit(mmc);
mmc_remove_host(mmc);
clk_disable_unprepare(sprd_host->clk_sdio);
clk_disable_unprepare(sprd_host->clk_enable);
@@ -702,6 +718,7 @@ static int sdhci_sprd_runtime_suspend(struct device *dev)
struct sdhci_host *host = dev_get_drvdata(dev);
struct sdhci_sprd_host *sprd_host = TO_SPRD_HOST(host);

+ mmc_packed_queue_stop(host->mmc->packed);
sdhci_runtime_suspend_host(host);

clk_disable_unprepare(sprd_host->clk_sdio);
@@ -730,6 +747,7 @@ static int sdhci_sprd_runtime_resume(struct device *dev)
goto clk_disable;

sdhci_runtime_resume_host(host);
+ mmc_packed_queue_start(host->mmc->packed);
return 0;

clk_disable:
--
1.7.9.5
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