[PATCH v4 3/3] mmc: host: sdhci-sprd: Add software queue support

[Baolin Wang]

Add software queue support to improve the performance.

Signed-off-by: Baolin Wang <baolin.w...@linaro.org>
---
 drivers/mmc/host/Kconfig      |    1 +
 drivers/mmc/host/sdhci-sprd.c |   26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index efa4019..54b86f6 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -632,6 +632,7 @@ config MMC_SDHCI_SPRD
        depends on ARCH_SPRD
        depends on MMC_SDHCI_PLTFM
        select MMC_SDHCI_IO_ACCESSORS
+       select MMC_HSQ
        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 d07b979..3cc1277 100644
--- a/drivers/mmc/host/sdhci-sprd.c
+++ b/drivers/mmc/host/sdhci-sprd.c
@@ -19,6 +19,7 @@
 #include <linux/slab.h>
 
 #include "sdhci-pltfm.h"
+#include "mmc_hsq.h"
 
 /* SDHCI_ARGUMENT2 register high 16bit */
 #define SDHCI_SPRD_ARG2_STUFF          GENMASK(31, 16)
@@ -379,6 +380,16 @@ static unsigned int sdhci_sprd_get_ro(struct sdhci_host 
*host)
        return 0;
 }
 
+static void sdhci_sprd_request_done(struct sdhci_host *host,
+                                   struct mmc_request *mrq)
+{
+       /* Validate if the request was from software queue firstly. */
+       if (mmc_hsq_finalize_request(host->mmc, mrq))
+               return;
+
+        mmc_request_done(host->mmc, mrq);
+}
+
 static struct sdhci_ops sdhci_sprd_ops = {
        .read_l = sdhci_sprd_readl,
        .write_l = sdhci_sprd_writel,
@@ -392,6 +403,7 @@ static unsigned int sdhci_sprd_get_ro(struct sdhci_host 
*host)
        .hw_reset = sdhci_sprd_hw_reset,
        .get_max_timeout_count = sdhci_sprd_get_max_timeout_count,
        .get_ro = sdhci_sprd_get_ro,
+       .request_done = sdhci_sprd_request_done,
 };
 
 static void sdhci_sprd_request(struct mmc_host *mmc, struct mmc_request *mrq)
@@ -521,6 +533,7 @@ static int sdhci_sprd_probe(struct platform_device *pdev)
 {
        struct sdhci_host *host;
        struct sdhci_sprd_host *sprd_host;
+       struct mmc_hsq *hsq;
        struct clk *clk;
        int ret = 0;
 
@@ -631,6 +644,16 @@ static int sdhci_sprd_probe(struct platform_device *pdev)
 
        sprd_host->flags = host->flags;
 
+       hsq = devm_kzalloc(&pdev->dev, sizeof(*hsq), GFP_KERNEL);
+       if (!hsq) {
+               ret = -ENOMEM;
+               goto err_cleanup_host;
+       }
+
+       ret = mmc_hsq_init(hsq, host->mmc);
+       if (ret)
+               goto err_cleanup_host;
+
        ret = __sdhci_add_host(host);
        if (ret)
                goto err_cleanup_host;
@@ -689,6 +712,7 @@ 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_hsq_suspend(host->mmc);
        sdhci_runtime_suspend_host(host);
 
        clk_disable_unprepare(sprd_host->clk_sdio);
@@ -717,6 +741,8 @@ static int sdhci_sprd_runtime_resume(struct device *dev)
                goto clk_disable;
 
        sdhci_runtime_resume_host(host, 1);
+       mmc_hsq_resume(host->mmc);
+
        return 0;
 
 clk_disable:
-- 
1.7.9.5