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- /*
- * 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 = {0};
- 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 = {0};
- struct ufs_bsg_reply rsp = {0};
- 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,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
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