cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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queue.h (2918B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef MMC_QUEUE_H
      3#define MMC_QUEUE_H
      4
      5#include <linux/types.h>
      6#include <linux/blkdev.h>
      7#include <linux/blk-mq.h>
      8#include <linux/mmc/core.h>
      9#include <linux/mmc/host.h>
     10
     11enum mmc_issued {
     12	MMC_REQ_STARTED,
     13	MMC_REQ_BUSY,
     14	MMC_REQ_FAILED_TO_START,
     15	MMC_REQ_FINISHED,
     16};
     17
     18enum mmc_issue_type {
     19	MMC_ISSUE_SYNC,
     20	MMC_ISSUE_DCMD,
     21	MMC_ISSUE_ASYNC,
     22	MMC_ISSUE_MAX,
     23};
     24
     25static inline struct mmc_queue_req *req_to_mmc_queue_req(struct request *rq)
     26{
     27	return blk_mq_rq_to_pdu(rq);
     28}
     29
     30struct mmc_queue_req;
     31
     32static inline struct request *mmc_queue_req_to_req(struct mmc_queue_req *mqr)
     33{
     34	return blk_mq_rq_from_pdu(mqr);
     35}
     36
     37struct mmc_blk_data;
     38struct mmc_blk_ioc_data;
     39
     40struct mmc_blk_request {
     41	struct mmc_request	mrq;
     42	struct mmc_command	sbc;
     43	struct mmc_command	cmd;
     44	struct mmc_command	stop;
     45	struct mmc_data		data;
     46};
     47
     48/**
     49 * enum mmc_drv_op - enumerates the operations in the mmc_queue_req
     50 * @MMC_DRV_OP_IOCTL: ioctl operation
     51 * @MMC_DRV_OP_IOCTL_RPMB: RPMB-oriented ioctl operation
     52 * @MMC_DRV_OP_BOOT_WP: write protect boot partitions
     53 * @MMC_DRV_OP_GET_CARD_STATUS: get card status
     54 * @MMC_DRV_OP_GET_EXT_CSD: get the EXT CSD from an eMMC card
     55 */
     56enum mmc_drv_op {
     57	MMC_DRV_OP_IOCTL,
     58	MMC_DRV_OP_IOCTL_RPMB,
     59	MMC_DRV_OP_BOOT_WP,
     60	MMC_DRV_OP_GET_CARD_STATUS,
     61	MMC_DRV_OP_GET_EXT_CSD,
     62};
     63
     64struct mmc_queue_req {
     65	struct mmc_blk_request	brq;
     66	struct scatterlist	*sg;
     67	enum mmc_drv_op		drv_op;
     68	int			drv_op_result;
     69	void			*drv_op_data;
     70	unsigned int		ioc_count;
     71	int			retries;
     72};
     73
     74struct mmc_queue {
     75	struct mmc_card		*card;
     76	struct mmc_ctx		ctx;
     77	struct blk_mq_tag_set	tag_set;
     78	struct mmc_blk_data	*blkdata;
     79	struct request_queue	*queue;
     80	spinlock_t		lock;
     81	int			in_flight[MMC_ISSUE_MAX];
     82	unsigned int		cqe_busy;
     83#define MMC_CQE_DCMD_BUSY	BIT(0)
     84	bool			busy;
     85	bool			recovery_needed;
     86	bool			in_recovery;
     87	bool			rw_wait;
     88	bool			waiting;
     89	struct work_struct	recovery_work;
     90	wait_queue_head_t	wait;
     91	struct request		*recovery_req;
     92	struct request		*complete_req;
     93	struct mutex		complete_lock;
     94	struct work_struct	complete_work;
     95};
     96
     97struct gendisk *mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card);
     98extern void mmc_cleanup_queue(struct mmc_queue *);
     99extern void mmc_queue_suspend(struct mmc_queue *);
    100extern void mmc_queue_resume(struct mmc_queue *);
    101extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
    102				     struct mmc_queue_req *);
    103
    104void mmc_cqe_check_busy(struct mmc_queue *mq);
    105void mmc_cqe_recovery_notifier(struct mmc_request *mrq);
    106
    107enum mmc_issue_type mmc_issue_type(struct mmc_queue *mq, struct request *req);
    108
    109static inline int mmc_tot_in_flight(struct mmc_queue *mq)
    110{
    111	return mq->in_flight[MMC_ISSUE_SYNC] +
    112	       mq->in_flight[MMC_ISSUE_DCMD] +
    113	       mq->in_flight[MMC_ISSUE_ASYNC];
    114}
    115
    116static inline int mmc_cqe_qcnt(struct mmc_queue *mq)
    117{
    118	return mq->in_flight[MMC_ISSUE_DCMD] +
    119	       mq->in_flight[MMC_ISSUE_ASYNC];
    120}
    121
    122#endif