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sm7325-common: gpt-utils: Add UFS BSG IOCTL for slot switch

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- Use Opensource UFS BSG framework by replacing existing UFS IOCTL implementation.

Change-Id: Idc5ef9658dc93f2d7b351361b59f87cb21c7f7d9
This commit is contained in:
Nirmal Kumar 2020-04-02 23:35:06 -07:00 • committed by SGCMarkus
commit cb02d14619
4 changed files with 391 additions and 53 deletions
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56
gpt-utils/gpt-utils.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2013,2016, The Linux Foundation. All rights reserved.
* Copyright (c) 2013,2016,2020 The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
@ -37,10 +37,6 @@
#include <errno.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#ifndef _GENERIC_KERNEL_HEADERS
#include <scsi/ufs/ioctl.h>
#include <scsi/ufs/ufs.h>
#endif
#include <unistd.h>
#include <linux/fs.h>
#include <limits.h>
@ -76,8 +72,6 @@
#define XBL_AB_SECONDARY "/dev/block/bootdevice/by-name/xbl_b"
/* GPT defines */
#define MAX_LUNS 26
//Size of the buffer that needs to be passed to the UFS ioctl
#define UFS_ATTR_DATA_SIZE 32
//This will allow us to get the root lun path from the path to the partition.
//i.e: from /dev/block/sdaXXX get /dev/block/sda. The assumption here is that
//the boot critical luns lie between sda to sdz which is acceptable because
@ -129,6 +123,7 @@ struct update_data {
uint32_t num_valid_entries;
};
int32_t set_boot_lun(char *sg_dev,uint8_t boot_lun_id);
/******************************************************************************
* FUNCTIONS
******************************************************************************/
@ -612,53 +607,7 @@ error:
return -1;
}
int set_boot_lun(char *sg_dev, uint8_t boot_lun_id)
{
#ifndef _GENERIC_KERNEL_HEADERS
int fd = -1;
int rc;
struct ufs_ioctl_query_data *data = NULL;
size_t ioctl_data_size = sizeof(struct ufs_ioctl_query_data) + UFS_ATTR_DATA_SIZE;
data = (struct ufs_ioctl_query_data*)malloc(ioctl_data_size);
if (!data) {
fprintf(stderr, "%s: Failed to alloc query data struct\n",
__func__);
goto error;
}
memset(data, 0, ioctl_data_size);
data->opcode = UPIU_QUERY_OPCODE_WRITE_ATTR;
data->idn = QUERY_ATTR_IDN_BOOT_LU_EN;
data->buf_size = UFS_ATTR_DATA_SIZE;
data->buffer[0] = boot_lun_id;
fd = open(sg_dev, O_RDWR);
if (fd < 0) {
fprintf(stderr, "%s: Failed to open %s(%s)\n",
__func__,
sg_dev,
strerror(errno));
goto error;
}
rc = ioctl(fd, UFS_IOCTL_QUERY, data);
if (rc) {
fprintf(stderr, "%s: UFS query ioctl failed(%s)\n",
__func__,
strerror(errno));
goto error;
}
close(fd);
free(data);
return 0;
error:
if (fd >= 0)
close(fd);
if (data)
free(data);
return -1;
#else
return 0;
#endif
}
//Swtich betwieen using either the primary or the backup
//boot LUN for boot. This is required since UFS boot partitions
@ -732,6 +681,7 @@ int gpt_utils_set_xbl_boot_partition(enum boot_chain chain)
__func__);
goto error;
}
/* set boot lun using /dev/sg or /dev/ufs-bsg* */
if (set_boot_lun(sg_dev_node, boot_lun_id)) {
fprintf(stderr, "%s: Failed to set xblbak as boot partition\n",
__func__);