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Message-ID: <eb63383d-89f4-064b-5dfd-e87ab09c0724@amd.com>
Date: Mon, 30 Jan 2023 09:30:58 +0100
From: Michal Simek <michal.simek@....com>
To: Michael Wu <michael@...winnertech.com>, <adrian.hunter@...el.com>,
<riteshh@...eaurora.org>, <asutoshd@...eaurora.org>,
<ulf.hansson@...aro.org>, <chaotian.jing@...iatek.com>,
<matthias.bgg@...il.com>, <kdasu.kdev@...il.com>,
<alcooperx@...il.com>, <f.fainelli@...il.com>,
<haibo.chen@....com>, <shawnguo@...nel.org>, <agross@...nel.org>,
<andersson@...nel.org>, <michal.simek@...inx.com>,
<thierry.reding@...il.com>, <jonathanh@...dia.com>
CC: <bcm-kernel-feedback-list@...adcom.com>, <kernel@...gutronix.de>,
<festevam@...il.com>, <linux-imx@....com>,
<konrad.dybcio@...aro.org>, <linux-mmc@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
<linux-arm-msm@...r.kernel.org>, <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH] mmc:mmc-cqhci:support interrupt coalescing
If you look at commits on drivers/mmc/host/cqhci-core.c you will see that
subject style is
mmc: cqhci:<space>
Also some tools are checking this style. Please fix it.
On 1/30/23 07:46, Michael Wu wrote:
>
> Support interrupt coalescing to reduce the frequency of mmc interrupts
Missing dot at the end of sentence. I expect that you are doing it for a reason.
I would guess that it increase performance but without any details.
Should I enable it to get for example 20% better performance?
Commit message should be IMHO much bigger with more details and some information
about how coaleascing works would be also worth.
>
> Signed-off-by: Michael Wu <michael@...winnertech.com>
> ---
> drivers/mmc/host/cqhci-core.c | 20 +++++++++++++++-----
> drivers/mmc/host/cqhci.h | 5 ++++-
> drivers/mmc/host/mtk-sd.c | 2 +-
> drivers/mmc/host/sdhci-brcmstb.c | 2 +-
> drivers/mmc/host/sdhci-esdhc-imx.c | 2 +-
> drivers/mmc/host/sdhci-msm.c | 2 +-
> drivers/mmc/host/sdhci-of-arasan.c | 2 +-
> drivers/mmc/host/sdhci-pci-core.c | 2 +-
> drivers/mmc/host/sdhci-pci-gli.c | 2 +-
> drivers/mmc/host/sdhci-tegra.c | 2 +-
> drivers/mmc/host/sdhci_am654.c | 2 +-
> 11 files changed, 28 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/mmc/host/cqhci-core.c b/drivers/mmc/host/cqhci-core.c
> index b3d7d6d8d654..f9cdf9f04bfc 100644
> --- a/drivers/mmc/host/cqhci-core.c
> +++ b/drivers/mmc/host/cqhci-core.c
> @@ -420,7 +420,7 @@ static void cqhci_disable(struct mmc_host *mmc)
> }
>
> static void cqhci_prep_task_desc(struct mmc_request *mrq,
> - struct cqhci_host *cq_host, int tag)
> + struct cqhci_host *cq_host, int tag, int intr)
> {
> __le64 *task_desc = (__le64 __force *)get_desc(cq_host, tag);
> u32 req_flags = mrq->data->flags;
> @@ -428,7 +428,7 @@ static void cqhci_prep_task_desc(struct mmc_request *mrq,
>
> desc0 = CQHCI_VALID(1) |
> CQHCI_END(1) |
> - CQHCI_INT(1) |
> + CQHCI_INT(intr) |
> CQHCI_ACT(0x5) |
> CQHCI_FORCED_PROG(!!(req_flags & MMC_DATA_FORCED_PRG)) |
> CQHCI_DATA_TAG(!!(req_flags & MMC_DATA_DAT_TAG)) |
> @@ -621,7 +621,7 @@ static int cqhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
> }
>
> if (mrq->data) {
> - cqhci_prep_task_desc(mrq, cq_host, tag);
> + cqhci_prep_task_desc(mrq, cq_host, tag, (cq_host->intr_clsc ? 0 : 1));
>
> err = cqhci_prep_tran_desc(mrq, cq_host, tag);
> if (err) {
> @@ -812,7 +812,7 @@ static void cqhci_finish_mrq(struct mmc_host *mmc, unsigned int tag)
> irqreturn_t cqhci_irq(struct mmc_host *mmc, u32 intmask, int cmd_error,
> int data_error)
> {
> - u32 status;
> + u32 status, rval;
> unsigned long tag = 0, comp_status;
> struct cqhci_host *cq_host = mmc->cqe_private;
>
> @@ -856,6 +856,15 @@ irqreturn_t cqhci_irq(struct mmc_host *mmc, u32 intmask, int cmd_error,
> spin_unlock(&cq_host->lock);
> }
>
> + if (cq_host->intr_clsc) {
> + rval = cqhci_readl(cq_host, CQHCI_IC);
> + rval |= CQHCI_IC_RESET;
> + cqhci_writel(cq_host, rval, CQHCI_IC);
> + rval = cqhci_readl(cq_host, CQHCI_IC);
> + rval &= (~CQHCI_IC_RESET);
> + cqhci_writel(cq_host, rval, CQHCI_IC);
> + }
> +
> if (status & CQHCI_IS_TCL)
> wake_up(&cq_host->wait_queue);
>
> @@ -1172,11 +1181,12 @@ static unsigned int cqhci_ver_minor(struct cqhci_host *cq_host)
> }
>
> int cqhci_init(struct cqhci_host *cq_host, struct mmc_host *mmc,
> - bool dma64)
> + bool dma64, bool intr_clsc)
> {
> int err;
>
> cq_host->dma64 = dma64;
> + cq_host->intr_clsc = intr_clsc;
> cq_host->mmc = mmc;
> cq_host->mmc->cqe_private = cq_host;
>
> diff --git a/drivers/mmc/host/cqhci.h b/drivers/mmc/host/cqhci.h
> index ba9387ed90eb..acf90773c30a 100644
> --- a/drivers/mmc/host/cqhci.h
> +++ b/drivers/mmc/host/cqhci.h
> @@ -227,6 +227,9 @@ struct cqhci_host {
>
> /* 64 bit DMA */
> bool dma64;
> +
> + /* interrupt coalescing*/
missing space.
> + bool intr_clsc;
> int num_slots;
> int qcnt;
>
> @@ -312,7 +315,7 @@ struct platform_device;
>
> irqreturn_t cqhci_irq(struct mmc_host *mmc, u32 intmask, int cmd_error,
> int data_error);
> -int cqhci_init(struct cqhci_host *cq_host, struct mmc_host *mmc, bool dma64);
> +int cqhci_init(struct cqhci_host *cq_host, struct mmc_host *mmc, bool dma64, bool intr_clsc);
> struct cqhci_host *cqhci_pltfm_init(struct platform_device *pdev);
> int cqhci_deactivate(struct mmc_host *mmc);
> static inline int cqhci_suspend(struct mmc_host *mmc)
> diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
> index edade0e54a0c..2c18f954d4b8 100644
> --- a/drivers/mmc/host/mtk-sd.c
> +++ b/drivers/mmc/host/mtk-sd.c
> @@ -2796,7 +2796,7 @@ static int msdc_drv_probe(struct platform_device *pdev)
> host->cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
> host->cq_host->mmio = host->base + 0x800;
> host->cq_host->ops = &msdc_cmdq_ops;
> - ret = cqhci_init(host->cq_host, mmc, true);
> + ret = cqhci_init(host->cq_host, mmc, true, false);
> if (ret)
> goto host_free;
> mmc->max_segs = 128;
> diff --git a/drivers/mmc/host/sdhci-brcmstb.c b/drivers/mmc/host/sdhci-brcmstb.c
> index f2cf3d70db79..4aeaeddbbf25 100644
> --- a/drivers/mmc/host/sdhci-brcmstb.c
> +++ b/drivers/mmc/host/sdhci-brcmstb.c
> @@ -231,7 +231,7 @@ static int sdhci_brcmstb_add_host(struct sdhci_host *host,
> cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
> }
>
> - ret = cqhci_init(cq_host, host->mmc, dma64);
> + ret = cqhci_init(cq_host, host->mmc, dma64, false);
> if (ret)
> goto cleanup;
>
> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
> index 9e73c34b6401..7aef7abe71f1 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -1712,7 +1712,7 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
> cq_host->mmio = host->ioaddr + ESDHC_CQHCI_ADDR_OFFSET;
> cq_host->ops = &esdhc_cqhci_ops;
>
> - err = cqhci_init(cq_host, host->mmc, false);
> + err = cqhci_init(cq_host, host->mmc, false, false);
> if (err)
> goto disable_ahb_clk;
> }
> diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
> index 4ac8651d0b29..b6549d1e43ec 100644
> --- a/drivers/mmc/host/sdhci-msm.c
> +++ b/drivers/mmc/host/sdhci-msm.c
> @@ -2153,7 +2153,7 @@ static int sdhci_msm_cqe_add_host(struct sdhci_host *host,
> if (ret)
> goto cleanup;
>
> - ret = cqhci_init(cq_host, host->mmc, dma64);
> + ret = cqhci_init(cq_host, host->mmc, dma64, false);
> if (ret) {
> dev_err(&pdev->dev, "%s: CQE init: failed (%d)\n",
> mmc_hostname(host->mmc), ret);
> diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
> index 89c431a34c43..811f8686532d 100644
> --- a/drivers/mmc/host/sdhci-of-arasan.c
> +++ b/drivers/mmc/host/sdhci-of-arasan.c
> @@ -1610,7 +1610,7 @@ static int sdhci_arasan_add_host(struct sdhci_arasan_data *sdhci_arasan)
> if (dma64)
> cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
>
> - ret = cqhci_init(cq_host, host->mmc, dma64);
> + ret = cqhci_init(cq_host, host->mmc, dma64, false);
> if (ret)
> goto cleanup;
>
> diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
> index c359f867df0a..6f6cae6355a7 100644
> --- a/drivers/mmc/host/sdhci-pci-core.c
> +++ b/drivers/mmc/host/sdhci-pci-core.c
> @@ -964,7 +964,7 @@ static int glk_emmc_add_host(struct sdhci_pci_slot *slot)
> if (dma64)
> cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
>
> - ret = cqhci_init(cq_host, host->mmc, dma64);
> + ret = cqhci_init(cq_host, host->mmc, dma64, false);
> if (ret)
> goto cleanup;
>
> diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
> index 633a8ee8f8c5..6917ba339aa9 100644
> --- a/drivers/mmc/host/sdhci-pci-gli.c
> +++ b/drivers/mmc/host/sdhci-pci-gli.c
> @@ -908,7 +908,7 @@ static int gl9763e_add_host(struct sdhci_pci_slot *slot)
> if (dma64)
> cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
>
> - ret = cqhci_init(cq_host, host->mmc, dma64);
> + ret = cqhci_init(cq_host, host->mmc, dma64, false);
> if (ret)
> goto cleanup;
>
> diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
> index bff084f178c9..f98a468e8f43 100644
> --- a/drivers/mmc/host/sdhci-tegra.c
> +++ b/drivers/mmc/host/sdhci-tegra.c
> @@ -1620,7 +1620,7 @@ static int sdhci_tegra_add_host(struct sdhci_host *host)
> if (dma64)
> cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
>
> - ret = cqhci_init(cq_host, host->mmc, dma64);
> + ret = cqhci_init(cq_host, host->mmc, dma64, false);
> if (ret)
> goto cleanup;
>
> diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c
> index 7ef828942df3..8e7fbee70e16 100644
> --- a/drivers/mmc/host/sdhci_am654.c
> +++ b/drivers/mmc/host/sdhci_am654.c
> @@ -568,7 +568,7 @@ static int sdhci_am654_cqe_add_host(struct sdhci_host *host)
>
> host->mmc->caps2 |= MMC_CAP2_CQE;
>
> - return cqhci_init(cq_host, host->mmc, 1);
> + return cqhci_init(cq_host, host->mmc, 1, false);
> }
>
> static int sdhci_am654_get_otap_delay(struct sdhci_host *host,
> --
> 2.29.0
>
M
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