mmc: mmc: Add functions to enable / disable the Command Queue (b658af71) · Commits · 戴 / test

Documentation/mmc/mmc-dev-attrs.txt

+1 −0

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		@@ -30,6 +30,7 @@ All attributes are read-only.
		rel_sectors Reliable write sector count
		ocr Operation Conditions Register
		dsr Driver Stage Register
		cmdq_en Command Queue enabled: 1 => enabled, 0 => not enabled

		Note on Erase Size and Preferred Erase Size:

+2 −0

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		@@ -790,6 +790,7 @@ MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
		MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
		MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
		MMC_DEV_ATTR(ocr, "%08x\n", card->ocr);
		MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en);

		static ssize_t mmc_fwrev_show(struct device *dev,
		struct device_attribute *attr,
		@@ -845,6 +846,7 @@ static struct attribute *mmc_std_attrs[] = {
		&dev_attr_rel_sectors.attr,
		&dev_attr_ocr.attr,
		&dev_attr_dsr.attr,
		&dev_attr_cmdq_en.attr,
		NULL,
		};
		ATTRIBUTE_GROUPS(mmc_std);

+28 −0

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		@@ -838,3 +838,31 @@ int mmc_can_ext_csd(struct mmc_card *card)
		{
		return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3);
		}

		static int mmc_cmdq_switch(struct mmc_card *card, bool enable)
		{
		u8 val = enable ? EXT_CSD_CMDQ_MODE_ENABLED : 0;
		int err;

		if (!card->ext_csd.cmdq_support)
		return -EOPNOTSUPP;

		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_CMDQ_MODE_EN,
		val, card->ext_csd.generic_cmd6_time);
		if (!err)
		card->ext_csd.cmdq_en = enable;

		return err;
		}

		int mmc_cmdq_enable(struct mmc_card *card)
		{
		return mmc_cmdq_switch(card, true);
		}
		EXPORT_SYMBOL_GPL(mmc_cmdq_enable);

		int mmc_cmdq_disable(struct mmc_card *card)
		{
		return mmc_cmdq_switch(card, false);
		}
		EXPORT_SYMBOL_GPL(mmc_cmdq_disable);

+2 −0

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		@@ -46,6 +46,8 @@ int mmc_read_bkops_status(struct mmc_card *card);
		void mmc_start_bkops(struct mmc_card *card, bool from_exception);
		int mmc_can_reset(struct mmc_card *card);
		int mmc_flush_cache(struct mmc_card *card);
		int mmc_cmdq_enable(struct mmc_card *card);
		int mmc_cmdq_disable(struct mmc_card *card);

		#endif

+1 −0

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		@@ -89,6 +89,7 @@ struct mmc_ext_csd {
		unsigned int boot_ro_lock; /* ro lock support */
		bool boot_ro_lockable;
		bool ffu_capable; /* Firmware upgrade support */
		bool cmdq_en; /* Command Queue enabled */
		bool cmdq_support; /* Command Queue supported */
		unsigned int cmdq_depth; /* Command Queue depth */
		#define MMC_FIRMWARE_LEN 8