256 lines
7.8 KiB
C++
256 lines
7.8 KiB
C++
/*
|
|
* Copyright (c) 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
|
|
* met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials provided
|
|
* with the distribution.
|
|
* * Neither the name of The Linux Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
|
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
|
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
|
|
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
|
|
#define LOG_TAG "recovery_ufs"
|
|
|
|
#include "recovery-ufs-bsg.h"
|
|
|
|
#ifndef _BSG_FRAMEWORK_KERNEL_HEADERS
|
|
#ifndef _GENERIC_KERNEL_HEADERS
|
|
#include <scsi/ufs/ioctl.h>
|
|
#include <scsi/ufs/ufs.h>
|
|
#endif
|
|
#endif
|
|
|
|
//Size of the buffer that needs to be passed to the UFS ioctl
|
|
#define UFS_ATTR_DATA_SIZE 32
|
|
|
|
#ifdef _BSG_FRAMEWORK_KERNEL_HEADERS
|
|
static int get_ufs_bsg_dev(void)
|
|
{
|
|
DIR *dir;
|
|
struct dirent *ent;
|
|
int ret = -ENODEV;
|
|
|
|
if ((dir = opendir ("/dev")) != NULL) {
|
|
/* read all the files and directories within directory */
|
|
while ((ent = readdir(dir)) != NULL) {
|
|
if (!strcmp(ent->d_name, "ufs-bsg") ||
|
|
!strcmp(ent->d_name, "ufs-bsg0")) {
|
|
snprintf(ufs_bsg_dev, FNAME_SZ, "/dev/%s", ent->d_name);
|
|
ret = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (ret)
|
|
ALOGE("could not find the ufs-bsg dev\n");
|
|
closedir (dir);
|
|
} else {
|
|
/* could not open directory */
|
|
ALOGE("could not open /dev (error no: %d)\n", errno);
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ufs_bsg_dev_open(void)
|
|
{
|
|
int ret;
|
|
if (!fd_ufs_bsg) {
|
|
fd_ufs_bsg = open(ufs_bsg_dev, O_RDWR);
|
|
ret = errno;
|
|
if (fd_ufs_bsg < 0) {
|
|
ALOGE("Unable to open %s (error no: %d)",
|
|
ufs_bsg_dev, errno);
|
|
fd_ufs_bsg = 0;
|
|
return ret;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void ufs_bsg_dev_close(void)
|
|
{
|
|
if (fd_ufs_bsg) {
|
|
close(fd_ufs_bsg);
|
|
fd_ufs_bsg = 0;
|
|
}
|
|
}
|
|
|
|
static int ufs_bsg_ioctl(int fd, struct ufs_bsg_request *req,
|
|
struct ufs_bsg_reply *rsp, __u8 *buf, __u32 buf_len,
|
|
enum bsg_ioctl_dir dir)
|
|
{
|
|
int ret;
|
|
struct sg_io_v4 sg_io{};
|
|
|
|
sg_io.guard = 'Q';
|
|
sg_io.protocol = BSG_PROTOCOL_SCSI;
|
|
sg_io.subprotocol = BSG_SUB_PROTOCOL_SCSI_TRANSPORT;
|
|
sg_io.request_len = sizeof(*req);
|
|
sg_io.request = (__u64)req;
|
|
sg_io.response = (__u64)rsp;
|
|
sg_io.max_response_len = sizeof(*rsp);
|
|
if (dir == BSG_IOCTL_DIR_FROM_DEV) {
|
|
sg_io.din_xfer_len = buf_len;
|
|
sg_io.din_xferp = (__u64)(buf);
|
|
} else {
|
|
sg_io.dout_xfer_len = buf_len;
|
|
sg_io.dout_xferp = (__u64)(buf);
|
|
}
|
|
|
|
ret = ioctl(fd, SG_IO, &sg_io);
|
|
if (ret)
|
|
ALOGE("%s: Error from sg_io ioctl (return value: %d, error no: %d, reply result from LLD: %d\n)",
|
|
__func__, ret, errno, rsp->result);
|
|
|
|
if (sg_io.info || rsp->result) {
|
|
ALOGE("%s: Error from sg_io info (check sg info: device_status: 0x%x, transport_status: 0x%x, driver_status: 0x%x, reply result from LLD: %d\n)",
|
|
__func__, sg_io.device_status, sg_io.transport_status,
|
|
sg_io.driver_status, rsp->result);
|
|
ret = -EAGAIN;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void compose_ufs_bsg_query_req(struct ufs_bsg_request *req, __u8 func,
|
|
__u8 opcode, __u8 idn, __u8 index, __u8 sel,
|
|
__u16 length)
|
|
{
|
|
struct utp_upiu_header *hdr = &req->upiu_req.header;
|
|
struct utp_upiu_query *qr = &req->upiu_req.qr;
|
|
|
|
req->msgcode = UTP_UPIU_QUERY_REQ;
|
|
hdr->dword_0 = DWORD(UTP_UPIU_QUERY_REQ, 0, 0, 0);
|
|
hdr->dword_1 = DWORD(0, func, 0, 0);
|
|
hdr->dword_2 = DWORD(0, 0, length >> 8, (__u8)length);
|
|
qr->opcode = opcode;
|
|
qr->idn = idn;
|
|
qr->index = index;
|
|
qr->selector = sel;
|
|
qr->length = htobe16(length);
|
|
}
|
|
|
|
|
|
static int ufs_query_attr(int fd, __u32 value,
|
|
__u8 func, __u8 opcode, __u8 idn,
|
|
__u8 index, __u8 sel)
|
|
{
|
|
struct ufs_bsg_request req{};
|
|
struct ufs_bsg_reply rsp{};
|
|
enum bsg_ioctl_dir dir = BSG_IOCTL_DIR_FROM_DEV;
|
|
int ret = 0;
|
|
|
|
if (opcode == QUERY_REQ_OP_WRITE_DESC || opcode == QUERY_REQ_OP_WRITE_ATTR)
|
|
dir = BSG_IOCTL_DIR_TO_DEV;
|
|
|
|
req.upiu_req.qr.value = htobe32(value);
|
|
|
|
compose_ufs_bsg_query_req(&req, func, opcode, idn, index, sel, 0);
|
|
|
|
ret = ufs_bsg_ioctl(fd, &req, &rsp, 0, 0, dir);
|
|
if (ret)
|
|
ALOGE("%s: Error from ufs_bsg_ioctl (return value: %d, error no: %d\n)",
|
|
__func__, ret, errno);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int32_t set_boot_lun(char *sg_dev __unused,uint8_t lun_id)
|
|
{
|
|
int32_t ret;
|
|
__u32 boot_lun_id = lun_id;
|
|
|
|
ret = get_ufs_bsg_dev();
|
|
if (ret)
|
|
return ret;
|
|
ALOGV("Found the ufs bsg dev: %s\n", ufs_bsg_dev);
|
|
|
|
ret = ufs_bsg_dev_open();
|
|
if (ret)
|
|
return ret;
|
|
ALOGV("Opened ufs bsg dev: %s\n", ufs_bsg_dev);
|
|
|
|
ret = ufs_query_attr(fd_ufs_bsg, boot_lun_id, QUERY_REQ_FUNC_STD_WRITE,
|
|
QUERY_REQ_OP_WRITE_ATTR, QUERY_ATTR_IDN_BOOT_LU_EN, 0, 0);
|
|
if (ret) {
|
|
ALOGE("Error requesting ufs attr idn %d via query ioctl (return value: %d, error no: %d)",
|
|
QUERY_ATTR_IDN_BOOT_LU_EN, ret, errno);
|
|
goto out;
|
|
}
|
|
out:
|
|
ufs_bsg_dev_close();
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
#ifndef _BSG_FRAMEWORK_KERNEL_HEADERS
|
|
int32_t 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
|
|
}
|
|
#endif
|
|
|