DCMD_SDMMC_PART

Get or clear information about a partition

Synopsis:

#include <hw/dcmd_sim_sdmmc.h>

#define DCMD_SDMMC_PART_INFO __DIOTF(_DCMD_CAM, _SIM_SDMMC + 10, struct _sdmmc_partition_info)

Arguments to devctl():

Argument	Value
`filedes`	A file descriptor that you obtained by opening the device
`dcmd`	DCMD_SDMMC_PART_INFO
`dev_data_ptr`	A pointer to a SDMMC_PARTITION_INFO structure
`n_bytes`	`sizeof(SDMMC_PARTITION_INFO)`
`dev_info_ptr`	NULL

Description:

This command gets or clears information about a partition. The SDMMC_PARTITION_INFO structure is defined as:

typedef struct _sdmmc_partition_info {
        uint32_t                action;
        uint32_t                rsvd;
        uint32_t                ptype;
        uint32_t                pflags;
        uint64_t                start_lba;
        uint64_t                num_lba;
        uint64_t                rc;
        uint64_t                wc;
        uint64_t                tc;
        uint64_t                ec;
        uint64_t                dc;
        uint32_t                rsvd1[64];
} SDMMC_PARTITION_INFO;

The members include:

action

The action to take; one of:

SDMMC_PI_ACTION_GET — get the current values
SDMMC_PI_ACTION_CLR — get the current values, and then reset the counters

ptype

The partition type; one of the following:

SDMMC_PTYPE_USER
SDMMC_PTYPE_BOOT1
SDMMC_PTYPE_BOOT2
SDMMC_PTYPE_RPMB
SDMMC_PTYPE_GP1
SDMMC_PTYPE_GP2
SDMMC_PTYPE_GP3
SDMMC_PTYPE_GP4

pflags

The partition flags; a bitwise OR of the following:

SDMMC_PFLAG_WP
SDMMC_PFLAG_ENH
SDMMC_PFLAG_VIRTUAL

start_lba

The starting logical block address.

num_lba

The number of logical blocks.

rc

The read count (sectors).

wc

The written count (sectors).

tc

The TRIM count (sectors).

ec

The erase count (sectors).

dc

The discard count (sectors).

Input:

Fill in the action.

Output:

The current counts are filled in.

DCMD_SDMMC_PART_INFO

Synopsis:

Arguments to devctl():

Description:

Input:

Output:

See also: