Merge tag 'mmc-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

Pull MMC updates from Ulf Hansson:
 "MMC core:
   - Continue to refactor the mmc block code to prepare for blkmq
   - Move mmc block debugfs into block module
   - Next step for eMMC CMDQ by adding a new mmc host interface for it
   - Move Kconfig option MMC_DEBUG from core to host
   - Some additional minor improvements

  MMC host:
   - Declare structs as const when applicable
   - Explicitly request exclusive reset control when applicable
   - Improve some error paths and other various cleanups
   - sdhci: Preparations to support SDHCI OMAP
   - sdhci: Improve some PM related code
   - sdhci: Re-factoring and modernizations
   - sdhci-xenon: Add runtime PM and system sleep support
   - sdhci-xenon: Add support for eMMC HS400 Enhanced Strobe
   - sdhci-cadence: Add system sleep support
   - sdhci-of-at91: Improve system sleep support
   - dw_mmc: Add support for Hisilicon hi3660
   - sunxi: Add support for A83T eMMC
   - sunxi: Add support for DDR52 mode
   - meson-gx: Add support for UHS-I SD-cards
   - meson-gx: Cleanups and improvements
   - tmio: Fix CMD12 (STOP) handling
   - tmio: Cleanups and improvements
   - renesas_sdhi: Add r8a7743/5 support
   - renesas-sdhi: Add support for R-Car Gen3 SDHI DMAC
   - renesas_sdhi: Cleanups and improvements"

* tag 'mmc-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: (145 commits)
  mmc: renesas_sdhi: Add r8a7743/5 support
  mmc: meson-gx: fix __ffsdi2 undefined on arm32
  mmc: sdhci-xenon: add runtime pm support and reimplement standby
  mmc: core: Move mmc_start_areq() declaration
  mmc: mmci: stop building qcom dml as module
  mmc: sunxi: Reset the device at probe time
  clk: sunxi-ng: Provide a default reset hook
  mmc: meson-gx: rework tuning function
  mmc: meson-gx: change default tx phase
  mmc: meson-gx: implement voltage switch callback
  mmc: meson-gx: use CCF to handle the clock phases
  mmc: meson-gx: implement card_busy callback
  mmc: meson-gx: simplify interrupt handler
  mmc: meson-gx: work around clk-stop issue
  mmc: meson-gx: fix dual data rate mode frequencies
  mmc: meson-gx: rework clock init function
  mmc: meson-gx: rework clk_set function
  mmc: meson-gx: rework set_ios function
  mmc: meson-gx: cfg init overwrite values
  mmc: meson-gx: initialize sane clk default before clock register
  ...

3 files changed, 72 insertions, 15 deletions

diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 46c73e97e61f..279b39008a33 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -29,8 +29,8 @@ struct mmc_csd {
 	unsigned char		structure;
 	unsigned char		mmca_vsn;
 	unsigned short		cmdclass;
-	unsigned short		tacc_clks;
-	unsigned int		tacc_ns;
+	unsigned short		taac_clks;
+	unsigned int		taac_ns;
 	unsigned int		c_size;
 	unsigned int		r2w_factor;
 	unsigned int		max_dtr;
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index a0c63ea28796..927519385482 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -122,11 +122,18 @@ struct mmc_data {
 	unsigned int		timeout_clks;	/* data timeout (in clocks) */
 	unsigned int		blksz;		/* data block size */
 	unsigned int		blocks;		/* number of blocks */
+	unsigned int		blk_addr;	/* block address */
 	int			error;		/* data error */
 	unsigned int		flags;
 
-#define MMC_DATA_WRITE	(1 << 8)
-#define MMC_DATA_READ	(1 << 9)
+#define MMC_DATA_WRITE		BIT(8)
+#define MMC_DATA_READ		BIT(9)
+/* Extra flags used by CQE */
+#define MMC_DATA_QBR		BIT(10)		/* CQE queue barrier*/
+#define MMC_DATA_PRIO		BIT(11)		/* CQE high priority */
+#define MMC_DATA_REL_WR		BIT(12)		/* Reliable write */
+#define MMC_DATA_DAT_TAG	BIT(13)		/* Tag request */
+#define MMC_DATA_FORCED_PRG	BIT(14)		/* Forced programming */
 
 	unsigned int		bytes_xfered;
 
@@ -149,18 +156,22 @@ struct mmc_request {
 	struct completion	completion;
 	struct completion	cmd_completion;
 	void			(*done)(struct mmc_request *);/* completion function */
+	/*
+	 * Notify uppers layers (e.g. mmc block driver) that recovery is needed
+	 * due to an error associated with the mmc_request. Currently used only
+	 * by CQE.
+	 */
+	void			(*recovery_notifier)(struct mmc_request *);
 	struct mmc_host		*host;
 
 	/* Allow other commands during this ongoing data transfer or busy wait */
 	bool			cap_cmd_during_tfr;
+
+	int			tag;
 };
 
 struct mmc_card;
-struct mmc_async_req;
 
-struct mmc_async_req *mmc_start_areq(struct mmc_host *host,
-				struct mmc_async_req *areq,
-				enum mmc_blk_status *ret_stat);
 void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq);
 int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd,
 		int retries);
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index ebd1cebbef0c..f3f2d07feb2a 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -162,6 +162,50 @@ struct mmc_host_ops {
 				  unsigned int direction, int blk_size);
 };
 
+struct mmc_cqe_ops {
+	/* Allocate resources, and make the CQE operational */
+	int	(*cqe_enable)(struct mmc_host *host, struct mmc_card *card);
+	/* Free resources, and make the CQE non-operational */
+	void	(*cqe_disable)(struct mmc_host *host);
+	/*
+	 * Issue a read, write or DCMD request to the CQE. Also deal with the
+	 * effect of ->cqe_off().
+	 */
+	int	(*cqe_request)(struct mmc_host *host, struct mmc_request *mrq);
+	/* Free resources (e.g. DMA mapping) associated with the request */
+	void	(*cqe_post_req)(struct mmc_host *host, struct mmc_request *mrq);
+	/*
+	 * Prepare the CQE and host controller to accept non-CQ commands. There
+	 * is no corresponding ->cqe_on(), instead ->cqe_request() is required
+	 * to deal with that.
+	 */
+	void	(*cqe_off)(struct mmc_host *host);
+	/*
+	 * Wait for all CQE tasks to complete. Return an error if recovery
+	 * becomes necessary.
+	 */
+	int	(*cqe_wait_for_idle)(struct mmc_host *host);
+	/*
+	 * Notify CQE that a request has timed out. Return false if the request
+	 * completed or true if a timeout happened in which case indicate if
+	 * recovery is needed.
+	 */
+	bool	(*cqe_timeout)(struct mmc_host *host, struct mmc_request *mrq,
+			       bool *recovery_needed);
+	/*
+	 * Stop all CQE activity and prepare the CQE and host controller to
+	 * accept recovery commands.
+	 */
+	void	(*cqe_recovery_start)(struct mmc_host *host);
+	/*
+	 * Clear the queue and call mmc_cqe_request_done() on all requests.
+	 * Requests that errored will have the error set on the mmc_request
+	 * (data->error or cmd->error for DCMD).  Requests that did not error
+	 * will have zero data bytes transferred.
+	 */
+	void	(*cqe_recovery_finish)(struct mmc_host *host);
+};
+
 struct mmc_async_req {
 	/* active mmc request */
 	struct mmc_request	*mrq;
@@ -291,10 +335,6 @@ struct mmc_host {
 				 MMC_CAP2_HS200_1_2V_SDR)
 #define MMC_CAP2_CD_ACTIVE_HIGH	(1 << 10)	/* Card-detect signal active high */
 #define MMC_CAP2_RO_ACTIVE_HIGH	(1 << 11)	/* Write-protect signal active high */
-#define MMC_CAP2_PACKED_RD	(1 << 12)	/* Allow packed read */
-#define MMC_CAP2_PACKED_WR	(1 << 13)	/* Allow packed write */
-#define MMC_CAP2_PACKED_CMD	(MMC_CAP2_PACKED_RD | \
-				 MMC_CAP2_PACKED_WR)
 #define MMC_CAP2_NO_PRESCAN_POWERUP (1 << 14)	/* Don't power up before scan */
 #define MMC_CAP2_HS400_1_8V	(1 << 15)	/* Can support HS400 1.8V */
 #define MMC_CAP2_HS400_1_2V	(1 << 16)	/* Can support HS400 1.2V */
@@ -307,6 +347,8 @@ struct mmc_host {
 #define MMC_CAP2_HS400_ES	(1 << 20)	/* Host supports enhanced strobe */
 #define MMC_CAP2_NO_SD		(1 << 21)	/* Do not send SD commands during initialization */
 #define MMC_CAP2_NO_MMC		(1 << 22)	/* Do not send (e)MMC commands during initialization */
+#define MMC_CAP2_CQE		(1 << 23)	/* Has eMMC command queue engine */
+#define MMC_CAP2_CQE_DCMD	(1 << 24)	/* CQE can issue a direct command */
 
 	mmc_pm_flag_t		pm_caps;	/* supported pm features */
 
@@ -328,9 +370,6 @@ struct mmc_host {
 	unsigned int		use_spi_crc:1;
 	unsigned int		claimed:1;	/* host exclusively claimed */
 	unsigned int		bus_dead:1;	/* bus has been released */
-#ifdef CONFIG_MMC_DEBUG
-	unsigned int		removed:1;	/* host is being removed */
-#endif
 	unsigned int		can_retune:1;	/* re-tuning can be used */
 	unsigned int		doing_retune:1;	/* re-tuning in progress */
 	unsigned int		retune_now:1;	/* do re-tuning at next req */
@@ -393,6 +432,13 @@ struct mmc_host {
 	int			dsr_req;	/* DSR value is valid */
 	u32			dsr;	/* optional driver stage (DSR) value */
 
+	/* Command Queue Engine (CQE) support */
+	const struct mmc_cqe_ops *cqe_ops;
+	void			*cqe_private;
+	int			cqe_qdepth;
+	bool			cqe_enabled;
+	bool			cqe_on;
+
 	unsigned long		private[0] ____cacheline_aligned;
 };