Release 4.15 drivers/mmc/core/queue.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef MMC_QUEUE_H

#define MMC_QUEUE_H

#include <linux/types.h>
#include <linux/blkdev.h>
#include <linux/blk-mq.h>
#include <linux/mmc/core.h>
#include <linux/mmc/host.h>



static inline struct mmc_queue_req *req_to_mmc_queue_req(struct request *rq)
{
	return blk_mq_rq_to_pdu(rq);
}

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struct mmc_queue_req;



static inline struct request *mmc_queue_req_to_req(struct mmc_queue_req *mqr)
{
	return blk_mq_rq_from_pdu(mqr);
}

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struct task_struct;
struct mmc_blk_data;
struct mmc_blk_ioc_data;


struct mmc_blk_request {
	
struct mmc_request	mrq;
	
struct mmc_command	sbc;
	
struct mmc_command	cmd;
	
struct mmc_command	stop;
	
struct mmc_data		data;
	
int			retune_retry_done;
};

/**
 * enum mmc_drv_op - enumerates the operations in the mmc_queue_req
 * @MMC_DRV_OP_IOCTL: ioctl operation
 * @MMC_DRV_OP_IOCTL_RPMB: RPMB-oriented ioctl operation
 * @MMC_DRV_OP_BOOT_WP: write protect boot partitions
 * @MMC_DRV_OP_GET_CARD_STATUS: get card status
 * @MMC_DRV_OP_GET_EXT_CSD: get the EXT CSD from an eMMC card
 */

enum mmc_drv_op {
	
MMC_DRV_OP_IOCTL,
	
MMC_DRV_OP_IOCTL_RPMB,
	
MMC_DRV_OP_BOOT_WP,
	
MMC_DRV_OP_GET_CARD_STATUS,
	
MMC_DRV_OP_GET_EXT_CSD,
};


struct mmc_queue_req {
	
struct mmc_blk_request	brq;
	
struct scatterlist	*sg;
	
struct mmc_async_req	areq;
	
enum mmc_drv_op		drv_op;
	
int			drv_op_result;
	
void			*drv_op_data;
	
unsigned int		ioc_count;
};


struct mmc_queue {
	
struct mmc_card		*card;
	
struct task_struct	*thread;
	
struct semaphore	thread_sem;
	
bool			suspended;
	
bool			asleep;
	
struct mmc_blk_data	*blkdata;
	
struct request_queue	*queue;
	/*
         * FIXME: this counter is not a very reliable way of keeping
         * track of how many requests that are ongoing. Switch to just
         * letting the block core keep track of requests and per-request
         * associated mmc_queue_req data.
         */
	
int			qcnt;
};

extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
			  const char *);
extern void mmc_cleanup_queue(struct mmc_queue *);
extern void mmc_queue_suspend(struct mmc_queue *);
extern void mmc_queue_resume(struct mmc_queue *);
extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
				     struct mmc_queue_req *);

#endif
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Directory: drivers/mmc/core

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