// SPDX-License-Identifier: GPL-2.0
|
/* Target based USB-Gadget
|
*
|
* UAS protocol handling, target callbacks, configfs handling,
|
* BBB (USB Mass Storage Class Bulk-Only (BBB) and Transport protocol handling.
|
*
|
* Author: Sebastian Andrzej Siewior <bigeasy at linutronix dot de>
|
*/
|
#include <linux/kernel.h>
|
#include <linux/module.h>
|
#include <linux/types.h>
|
#include <linux/string.h>
|
#include <linux/configfs.h>
|
#include <linux/ctype.h>
|
#include <linux/usb/ch9.h>
|
#include <linux/usb/composite.h>
|
#include <linux/usb/gadget.h>
|
#include <linux/usb/storage.h>
|
#include <scsi/scsi_tcq.h>
|
#include <target/target_core_base.h>
|
#include <target/target_core_fabric.h>
|
#include <asm/unaligned.h>
|
|
#include "tcm.h"
|
#include "u_tcm.h"
|
#include "configfs.h"
|
|
#define TPG_INSTANCES 1
|
|
struct tpg_instance {
|
struct usb_function_instance *func_inst;
|
struct usbg_tpg *tpg;
|
};
|
|
static struct tpg_instance tpg_instances[TPG_INSTANCES];
|
|
static DEFINE_MUTEX(tpg_instances_lock);
|
|
static inline struct f_uas *to_f_uas(struct usb_function *f)
|
{
|
return container_of(f, struct f_uas, function);
|
}
|
|
/* Start bot.c code */
|
|
static int bot_enqueue_cmd_cbw(struct f_uas *fu)
|
{
|
int ret;
|
|
if (fu->flags & USBG_BOT_CMD_PEND)
|
return 0;
|
|
ret = usb_ep_queue(fu->ep_out, fu->cmd.req, GFP_ATOMIC);
|
if (!ret)
|
fu->flags |= USBG_BOT_CMD_PEND;
|
return ret;
|
}
|
|
static void bot_status_complete(struct usb_ep *ep, struct usb_request *req)
|
{
|
struct usbg_cmd *cmd = req->context;
|
struct f_uas *fu = cmd->fu;
|
|
transport_generic_free_cmd(&cmd->se_cmd, 0);
|
if (req->status < 0) {
|
pr_err("ERR %s(%d)\n", __func__, __LINE__);
|
return;
|
}
|
|
/* CSW completed, wait for next CBW */
|
bot_enqueue_cmd_cbw(fu);
|
}
|
|
static void bot_enqueue_sense_code(struct f_uas *fu, struct usbg_cmd *cmd)
|
{
|
struct bulk_cs_wrap *csw = &fu->bot_status.csw;
|
int ret;
|
unsigned int csw_stat;
|
|
csw_stat = cmd->csw_code;
|
csw->Tag = cmd->bot_tag;
|
csw->Status = csw_stat;
|
fu->bot_status.req->context = cmd;
|
ret = usb_ep_queue(fu->ep_in, fu->bot_status.req, GFP_ATOMIC);
|
if (ret)
|
pr_err("%s(%d) ERR: %d\n", __func__, __LINE__, ret);
|
}
|
|
static void bot_err_compl(struct usb_ep *ep, struct usb_request *req)
|
{
|
struct usbg_cmd *cmd = req->context;
|
struct f_uas *fu = cmd->fu;
|
|
if (req->status < 0)
|
pr_err("ERR %s(%d)\n", __func__, __LINE__);
|
|
if (cmd->data_len) {
|
if (cmd->data_len > ep->maxpacket) {
|
req->length = ep->maxpacket;
|
cmd->data_len -= ep->maxpacket;
|
} else {
|
req->length = cmd->data_len;
|
cmd->data_len = 0;
|
}
|
|
usb_ep_queue(ep, req, GFP_ATOMIC);
|
return;
|
}
|
bot_enqueue_sense_code(fu, cmd);
|
}
|
|
static void bot_send_bad_status(struct usbg_cmd *cmd)
|
{
|
struct f_uas *fu = cmd->fu;
|
struct bulk_cs_wrap *csw = &fu->bot_status.csw;
|
struct usb_request *req;
|
struct usb_ep *ep;
|
|
csw->Residue = cpu_to_le32(cmd->data_len);
|
|
if (cmd->data_len) {
|
if (cmd->is_read) {
|
ep = fu->ep_in;
|
req = fu->bot_req_in;
|
} else {
|
ep = fu->ep_out;
|
req = fu->bot_req_out;
|
}
|
|
if (cmd->data_len > fu->ep_in->maxpacket) {
|
req->length = ep->maxpacket;
|
cmd->data_len -= ep->maxpacket;
|
} else {
|
req->length = cmd->data_len;
|
cmd->data_len = 0;
|
}
|
req->complete = bot_err_compl;
|
req->context = cmd;
|
req->buf = fu->cmd.buf;
|
usb_ep_queue(ep, req, GFP_KERNEL);
|
} else {
|
bot_enqueue_sense_code(fu, cmd);
|
}
|
}
|
|
static int bot_send_status(struct usbg_cmd *cmd, bool moved_data)
|
{
|
struct f_uas *fu = cmd->fu;
|
struct bulk_cs_wrap *csw = &fu->bot_status.csw;
|
int ret;
|
|
if (cmd->se_cmd.scsi_status == SAM_STAT_GOOD) {
|
if (!moved_data && cmd->data_len) {
|
/*
|
* the host wants to move data, we don't. Fill / empty
|
* the pipe and then send the csw with reside set.
|
*/
|
cmd->csw_code = US_BULK_STAT_OK;
|
bot_send_bad_status(cmd);
|
return 0;
|
}
|
|
csw->Tag = cmd->bot_tag;
|
csw->Residue = cpu_to_le32(0);
|
csw->Status = US_BULK_STAT_OK;
|
fu->bot_status.req->context = cmd;
|
|
ret = usb_ep_queue(fu->ep_in, fu->bot_status.req, GFP_KERNEL);
|
if (ret)
|
pr_err("%s(%d) ERR: %d\n", __func__, __LINE__, ret);
|
} else {
|
cmd->csw_code = US_BULK_STAT_FAIL;
|
bot_send_bad_status(cmd);
|
}
|
return 0;
|
}
|
|
/*
|
* Called after command (no data transfer) or after the write (to device)
|
* operation is completed
|
*/
|
static int bot_send_status_response(struct usbg_cmd *cmd)
|
{
|
bool moved_data = false;
|
|
if (!cmd->is_read)
|
moved_data = true;
|
return bot_send_status(cmd, moved_data);
|
}
|
|
/* Read request completed, now we have to send the CSW */
|
static void bot_read_compl(struct usb_ep *ep, struct usb_request *req)
|
{
|
struct usbg_cmd *cmd = req->context;
|
|
if (req->status < 0)
|
pr_err("ERR %s(%d)\n", __func__, __LINE__);
|
|
bot_send_status(cmd, true);
|
}
|
|
static int bot_send_read_response(struct usbg_cmd *cmd)
|
{
|
struct f_uas *fu = cmd->fu;
|
struct se_cmd *se_cmd = &cmd->se_cmd;
|
struct usb_gadget *gadget = fuas_to_gadget(fu);
|
int ret;
|
|
if (!cmd->data_len) {
|
cmd->csw_code = US_BULK_STAT_PHASE;
|
bot_send_bad_status(cmd);
|
return 0;
|
}
|
|
if (!gadget->sg_supported) {
|
cmd->data_buf = kmalloc(se_cmd->data_length, GFP_ATOMIC);
|
if (!cmd->data_buf)
|
return -ENOMEM;
|
|
sg_copy_to_buffer(se_cmd->t_data_sg,
|
se_cmd->t_data_nents,
|
cmd->data_buf,
|
se_cmd->data_length);
|
|
fu->bot_req_in->buf = cmd->data_buf;
|
} else {
|
fu->bot_req_in->buf = NULL;
|
fu->bot_req_in->num_sgs = se_cmd->t_data_nents;
|
fu->bot_req_in->sg = se_cmd->t_data_sg;
|
}
|
|
fu->bot_req_in->complete = bot_read_compl;
|
fu->bot_req_in->length = se_cmd->data_length;
|
fu->bot_req_in->context = cmd;
|
ret = usb_ep_queue(fu->ep_in, fu->bot_req_in, GFP_ATOMIC);
|
if (ret)
|
pr_err("%s(%d)\n", __func__, __LINE__);
|
return 0;
|
}
|
|
static void usbg_data_write_cmpl(struct usb_ep *, struct usb_request *);
|
static int usbg_prepare_w_request(struct usbg_cmd *, struct usb_request *);
|
|
static int bot_send_write_request(struct usbg_cmd *cmd)
|
{
|
struct f_uas *fu = cmd->fu;
|
struct se_cmd *se_cmd = &cmd->se_cmd;
|
struct usb_gadget *gadget = fuas_to_gadget(fu);
|
int ret;
|
|
init_completion(&cmd->write_complete);
|
cmd->fu = fu;
|
|
if (!cmd->data_len) {
|
cmd->csw_code = US_BULK_STAT_PHASE;
|
return -EINVAL;
|
}
|
|
if (!gadget->sg_supported) {
|
cmd->data_buf = kmalloc(se_cmd->data_length, GFP_KERNEL);
|
if (!cmd->data_buf)
|
return -ENOMEM;
|
|
fu->bot_req_out->buf = cmd->data_buf;
|
} else {
|
fu->bot_req_out->buf = NULL;
|
fu->bot_req_out->num_sgs = se_cmd->t_data_nents;
|
fu->bot_req_out->sg = se_cmd->t_data_sg;
|
}
|
|
fu->bot_req_out->complete = usbg_data_write_cmpl;
|
fu->bot_req_out->length = se_cmd->data_length;
|
fu->bot_req_out->context = cmd;
|
|
ret = usbg_prepare_w_request(cmd, fu->bot_req_out);
|
if (ret)
|
goto cleanup;
|
ret = usb_ep_queue(fu->ep_out, fu->bot_req_out, GFP_KERNEL);
|
if (ret)
|
pr_err("%s(%d)\n", __func__, __LINE__);
|
|
wait_for_completion(&cmd->write_complete);
|
target_execute_cmd(se_cmd);
|
cleanup:
|
return ret;
|
}
|
|
static int bot_submit_command(struct f_uas *, void *, unsigned int);
|
|
static void bot_cmd_complete(struct usb_ep *ep, struct usb_request *req)
|
{
|
struct f_uas *fu = req->context;
|
int ret;
|
|
fu->flags &= ~USBG_BOT_CMD_PEND;
|
|
if (req->status < 0)
|
return;
|
|
ret = bot_submit_command(fu, req->buf, req->actual);
|
if (ret)
|
pr_err("%s(%d): %d\n", __func__, __LINE__, ret);
|
}
|
|
static int bot_prepare_reqs(struct f_uas *fu)
|
{
|
int ret;
|
|
fu->bot_req_in = usb_ep_alloc_request(fu->ep_in, GFP_KERNEL);
|
if (!fu->bot_req_in)
|
goto err;
|
|
fu->bot_req_out = usb_ep_alloc_request(fu->ep_out, GFP_KERNEL);
|
if (!fu->bot_req_out)
|
goto err_out;
|
|
fu->cmd.req = usb_ep_alloc_request(fu->ep_out, GFP_KERNEL);
|
if (!fu->cmd.req)
|
goto err_cmd;
|
|
fu->bot_status.req = usb_ep_alloc_request(fu->ep_in, GFP_KERNEL);
|
if (!fu->bot_status.req)
|
goto err_sts;
|
|
fu->bot_status.req->buf = &fu->bot_status.csw;
|
fu->bot_status.req->length = US_BULK_CS_WRAP_LEN;
|
fu->bot_status.req->complete = bot_status_complete;
|
fu->bot_status.csw.Signature = cpu_to_le32(US_BULK_CS_SIGN);
|
|
fu->cmd.buf = kmalloc(fu->ep_out->maxpacket, GFP_KERNEL);
|
if (!fu->cmd.buf)
|
goto err_buf;
|
|
fu->cmd.req->complete = bot_cmd_complete;
|
fu->cmd.req->buf = fu->cmd.buf;
|
fu->cmd.req->length = fu->ep_out->maxpacket;
|
fu->cmd.req->context = fu;
|
|
ret = bot_enqueue_cmd_cbw(fu);
|
if (ret)
|
goto err_queue;
|
return 0;
|
err_queue:
|
kfree(fu->cmd.buf);
|
fu->cmd.buf = NULL;
|
err_buf:
|
usb_ep_free_request(fu->ep_in, fu->bot_status.req);
|
err_sts:
|
usb_ep_free_request(fu->ep_out, fu->cmd.req);
|
fu->cmd.req = NULL;
|
err_cmd:
|
usb_ep_free_request(fu->ep_out, fu->bot_req_out);
|
fu->bot_req_out = NULL;
|
err_out:
|
usb_ep_free_request(fu->ep_in, fu->bot_req_in);
|
fu->bot_req_in = NULL;
|
err:
|
pr_err("BOT: endpoint setup failed\n");
|
return -ENOMEM;
|
}
|
|
static void bot_cleanup_old_alt(struct f_uas *fu)
|
{
|
if (!(fu->flags & USBG_ENABLED))
|
return;
|
|
usb_ep_disable(fu->ep_in);
|
usb_ep_disable(fu->ep_out);
|
|
if (!fu->bot_req_in)
|
return;
|
|
usb_ep_free_request(fu->ep_in, fu->bot_req_in);
|
usb_ep_free_request(fu->ep_out, fu->bot_req_out);
|
usb_ep_free_request(fu->ep_out, fu->cmd.req);
|
usb_ep_free_request(fu->ep_in, fu->bot_status.req);
|
|
kfree(fu->cmd.buf);
|
|
fu->bot_req_in = NULL;
|
fu->bot_req_out = NULL;
|
fu->cmd.req = NULL;
|
fu->bot_status.req = NULL;
|
fu->cmd.buf = NULL;
|
}
|
|
static void bot_set_alt(struct f_uas *fu)
|
{
|
struct usb_function *f = &fu->function;
|
struct usb_gadget *gadget = f->config->cdev->gadget;
|
int ret;
|
|
fu->flags = USBG_IS_BOT;
|
|
config_ep_by_speed_and_alt(gadget, f, fu->ep_in, USB_G_ALT_INT_BBB);
|
ret = usb_ep_enable(fu->ep_in);
|
if (ret)
|
goto err_b_in;
|
|
config_ep_by_speed_and_alt(gadget, f, fu->ep_out, USB_G_ALT_INT_BBB);
|
ret = usb_ep_enable(fu->ep_out);
|
if (ret)
|
goto err_b_out;
|
|
ret = bot_prepare_reqs(fu);
|
if (ret)
|
goto err_wq;
|
fu->flags |= USBG_ENABLED;
|
pr_info("Using the BOT protocol\n");
|
return;
|
err_wq:
|
usb_ep_disable(fu->ep_out);
|
err_b_out:
|
usb_ep_disable(fu->ep_in);
|
err_b_in:
|
fu->flags = USBG_IS_BOT;
|
}
|
|
static int usbg_bot_setup(struct usb_function *f,
|
const struct usb_ctrlrequest *ctrl)
|
{
|
struct f_uas *fu = to_f_uas(f);
|
struct usb_composite_dev *cdev = f->config->cdev;
|
u16 w_value = le16_to_cpu(ctrl->wValue);
|
u16 w_length = le16_to_cpu(ctrl->wLength);
|
int luns;
|
u8 *ret_lun;
|
|
switch (ctrl->bRequest) {
|
case US_BULK_GET_MAX_LUN:
|
if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_CLASS |
|
USB_RECIP_INTERFACE))
|
return -ENOTSUPP;
|
|
if (w_length < 1)
|
return -EINVAL;
|
if (w_value != 0)
|
return -EINVAL;
|
luns = atomic_read(&fu->tpg->tpg_port_count);
|
if (!luns) {
|
pr_err("No LUNs configured?\n");
|
return -EINVAL;
|
}
|
/*
|
* If 4 LUNs are present we return 3 i.e. LUN 0..3 can be
|
* accessed. The upper limit is 0xf
|
*/
|
luns--;
|
if (luns > 0xf) {
|
pr_info_once("Limiting the number of luns to 16\n");
|
luns = 0xf;
|
}
|
ret_lun = cdev->req->buf;
|
*ret_lun = luns;
|
cdev->req->length = 1;
|
return usb_ep_queue(cdev->gadget->ep0, cdev->req, GFP_ATOMIC);
|
|
case US_BULK_RESET_REQUEST:
|
/* XXX maybe we should remove previous requests for IN + OUT */
|
bot_enqueue_cmd_cbw(fu);
|
return 0;
|
}
|
return -ENOTSUPP;
|
}
|
|
/* Start uas.c code */
|
|
static void uasp_cleanup_one_stream(struct f_uas *fu, struct uas_stream *stream)
|
{
|
/* We have either all three allocated or none */
|
if (!stream->req_in)
|
return;
|
|
usb_ep_free_request(fu->ep_in, stream->req_in);
|
usb_ep_free_request(fu->ep_out, stream->req_out);
|
usb_ep_free_request(fu->ep_status, stream->req_status);
|
|
stream->req_in = NULL;
|
stream->req_out = NULL;
|
stream->req_status = NULL;
|
}
|
|
static void uasp_free_cmdreq(struct f_uas *fu)
|
{
|
usb_ep_free_request(fu->ep_cmd, fu->cmd.req);
|
kfree(fu->cmd.buf);
|
fu->cmd.req = NULL;
|
fu->cmd.buf = NULL;
|
}
|
|
static void uasp_cleanup_old_alt(struct f_uas *fu)
|
{
|
int i;
|
|
if (!(fu->flags & USBG_ENABLED))
|
return;
|
|
usb_ep_disable(fu->ep_in);
|
usb_ep_disable(fu->ep_out);
|
usb_ep_disable(fu->ep_status);
|
usb_ep_disable(fu->ep_cmd);
|
|
for (i = 0; i < UASP_SS_EP_COMP_NUM_STREAMS; i++)
|
uasp_cleanup_one_stream(fu, &fu->stream[i]);
|
uasp_free_cmdreq(fu);
|
}
|
|
static void uasp_status_data_cmpl(struct usb_ep *ep, struct usb_request *req);
|
|
static int uasp_prepare_r_request(struct usbg_cmd *cmd)
|
{
|
struct se_cmd *se_cmd = &cmd->se_cmd;
|
struct f_uas *fu = cmd->fu;
|
struct usb_gadget *gadget = fuas_to_gadget(fu);
|
struct uas_stream *stream = cmd->stream;
|
|
if (!gadget->sg_supported) {
|
cmd->data_buf = kmalloc(se_cmd->data_length, GFP_ATOMIC);
|
if (!cmd->data_buf)
|
return -ENOMEM;
|
|
sg_copy_to_buffer(se_cmd->t_data_sg,
|
se_cmd->t_data_nents,
|
cmd->data_buf,
|
se_cmd->data_length);
|
|
stream->req_in->buf = cmd->data_buf;
|
} else {
|
stream->req_in->buf = NULL;
|
stream->req_in->num_sgs = se_cmd->t_data_nents;
|
stream->req_in->sg = se_cmd->t_data_sg;
|
}
|
|
stream->req_in->is_last = 1;
|
stream->req_in->complete = uasp_status_data_cmpl;
|
stream->req_in->length = se_cmd->data_length;
|
stream->req_in->context = cmd;
|
|
cmd->state = UASP_SEND_STATUS;
|
return 0;
|
}
|
|
static void uasp_prepare_status(struct usbg_cmd *cmd)
|
{
|
struct se_cmd *se_cmd = &cmd->se_cmd;
|
struct sense_iu *iu = &cmd->sense_iu;
|
struct uas_stream *stream = cmd->stream;
|
|
cmd->state = UASP_QUEUE_COMMAND;
|
iu->iu_id = IU_ID_STATUS;
|
iu->tag = cpu_to_be16(cmd->tag);
|
|
/*
|
* iu->status_qual = cpu_to_be16(STATUS QUALIFIER SAM-4. Where R U?);
|
*/
|
iu->len = cpu_to_be16(se_cmd->scsi_sense_length);
|
iu->status = se_cmd->scsi_status;
|
stream->req_status->is_last = 1;
|
stream->req_status->context = cmd;
|
stream->req_status->length = se_cmd->scsi_sense_length + 16;
|
stream->req_status->buf = iu;
|
stream->req_status->complete = uasp_status_data_cmpl;
|
}
|
|
static void uasp_status_data_cmpl(struct usb_ep *ep, struct usb_request *req)
|
{
|
struct usbg_cmd *cmd = req->context;
|
struct uas_stream *stream = cmd->stream;
|
struct f_uas *fu = cmd->fu;
|
int ret;
|
|
if (req->status < 0)
|
goto cleanup;
|
|
switch (cmd->state) {
|
case UASP_SEND_DATA:
|
ret = uasp_prepare_r_request(cmd);
|
if (ret)
|
goto cleanup;
|
ret = usb_ep_queue(fu->ep_in, stream->req_in, GFP_ATOMIC);
|
if (ret)
|
pr_err("%s(%d) => %d\n", __func__, __LINE__, ret);
|
break;
|
|
case UASP_RECEIVE_DATA:
|
ret = usbg_prepare_w_request(cmd, stream->req_out);
|
if (ret)
|
goto cleanup;
|
ret = usb_ep_queue(fu->ep_out, stream->req_out, GFP_ATOMIC);
|
if (ret)
|
pr_err("%s(%d) => %d\n", __func__, __LINE__, ret);
|
break;
|
|
case UASP_SEND_STATUS:
|
uasp_prepare_status(cmd);
|
ret = usb_ep_queue(fu->ep_status, stream->req_status,
|
GFP_ATOMIC);
|
if (ret)
|
pr_err("%s(%d) => %d\n", __func__, __LINE__, ret);
|
break;
|
|
case UASP_QUEUE_COMMAND:
|
transport_generic_free_cmd(&cmd->se_cmd, 0);
|
usb_ep_queue(fu->ep_cmd, fu->cmd.req, GFP_ATOMIC);
|
break;
|
|
default:
|
BUG();
|
}
|
return;
|
|
cleanup:
|
transport_generic_free_cmd(&cmd->se_cmd, 0);
|
}
|
|
static int uasp_send_status_response(struct usbg_cmd *cmd)
|
{
|
struct f_uas *fu = cmd->fu;
|
struct uas_stream *stream = cmd->stream;
|
struct sense_iu *iu = &cmd->sense_iu;
|
|
iu->tag = cpu_to_be16(cmd->tag);
|
stream->req_status->complete = uasp_status_data_cmpl;
|
stream->req_status->context = cmd;
|
cmd->fu = fu;
|
uasp_prepare_status(cmd);
|
return usb_ep_queue(fu->ep_status, stream->req_status, GFP_ATOMIC);
|
}
|
|
static int uasp_send_read_response(struct usbg_cmd *cmd)
|
{
|
struct f_uas *fu = cmd->fu;
|
struct uas_stream *stream = cmd->stream;
|
struct sense_iu *iu = &cmd->sense_iu;
|
int ret;
|
|
cmd->fu = fu;
|
|
iu->tag = cpu_to_be16(cmd->tag);
|
if (fu->flags & USBG_USE_STREAMS) {
|
|
ret = uasp_prepare_r_request(cmd);
|
if (ret)
|
goto out;
|
ret = usb_ep_queue(fu->ep_in, stream->req_in, GFP_ATOMIC);
|
if (ret) {
|
pr_err("%s(%d) => %d\n", __func__, __LINE__, ret);
|
kfree(cmd->data_buf);
|
cmd->data_buf = NULL;
|
}
|
|
} else {
|
|
iu->iu_id = IU_ID_READ_READY;
|
iu->tag = cpu_to_be16(cmd->tag);
|
|
stream->req_status->complete = uasp_status_data_cmpl;
|
stream->req_status->context = cmd;
|
|
cmd->state = UASP_SEND_DATA;
|
stream->req_status->buf = iu;
|
stream->req_status->length = sizeof(struct iu);
|
|
ret = usb_ep_queue(fu->ep_status, stream->req_status,
|
GFP_ATOMIC);
|
if (ret)
|
pr_err("%s(%d) => %d\n", __func__, __LINE__, ret);
|
}
|
out:
|
return ret;
|
}
|
|
static int uasp_send_write_request(struct usbg_cmd *cmd)
|
{
|
struct f_uas *fu = cmd->fu;
|
struct se_cmd *se_cmd = &cmd->se_cmd;
|
struct uas_stream *stream = cmd->stream;
|
struct sense_iu *iu = &cmd->sense_iu;
|
int ret;
|
|
init_completion(&cmd->write_complete);
|
cmd->fu = fu;
|
|
iu->tag = cpu_to_be16(cmd->tag);
|
|
if (fu->flags & USBG_USE_STREAMS) {
|
|
ret = usbg_prepare_w_request(cmd, stream->req_out);
|
if (ret)
|
goto cleanup;
|
ret = usb_ep_queue(fu->ep_out, stream->req_out, GFP_ATOMIC);
|
if (ret)
|
pr_err("%s(%d)\n", __func__, __LINE__);
|
|
} else {
|
|
iu->iu_id = IU_ID_WRITE_READY;
|
iu->tag = cpu_to_be16(cmd->tag);
|
|
stream->req_status->complete = uasp_status_data_cmpl;
|
stream->req_status->context = cmd;
|
|
cmd->state = UASP_RECEIVE_DATA;
|
stream->req_status->buf = iu;
|
stream->req_status->length = sizeof(struct iu);
|
|
ret = usb_ep_queue(fu->ep_status, stream->req_status,
|
GFP_ATOMIC);
|
if (ret)
|
pr_err("%s(%d)\n", __func__, __LINE__);
|
}
|
|
wait_for_completion(&cmd->write_complete);
|
target_execute_cmd(se_cmd);
|
cleanup:
|
return ret;
|
}
|
|
static int usbg_submit_command(struct f_uas *, void *, unsigned int);
|
|
static void uasp_cmd_complete(struct usb_ep *ep, struct usb_request *req)
|
{
|
struct f_uas *fu = req->context;
|
int ret;
|
|
if (req->status < 0)
|
return;
|
|
ret = usbg_submit_command(fu, req->buf, req->actual);
|
/*
|
* Once we tune for performance enqueue the command req here again so
|
* we can receive a second command while we processing this one. Pay
|
* attention to properly sync STAUS endpoint with DATA IN + OUT so you
|
* don't break HS.
|
*/
|
if (!ret)
|
return;
|
usb_ep_queue(fu->ep_cmd, fu->cmd.req, GFP_ATOMIC);
|
}
|
|
static int uasp_alloc_stream_res(struct f_uas *fu, struct uas_stream *stream)
|
{
|
stream->req_in = usb_ep_alloc_request(fu->ep_in, GFP_KERNEL);
|
if (!stream->req_in)
|
goto out;
|
|
stream->req_out = usb_ep_alloc_request(fu->ep_out, GFP_KERNEL);
|
if (!stream->req_out)
|
goto err_out;
|
|
stream->req_status = usb_ep_alloc_request(fu->ep_status, GFP_KERNEL);
|
if (!stream->req_status)
|
goto err_sts;
|
|
return 0;
|
|
err_sts:
|
usb_ep_free_request(fu->ep_out, stream->req_out);
|
stream->req_out = NULL;
|
err_out:
|
usb_ep_free_request(fu->ep_in, stream->req_in);
|
stream->req_in = NULL;
|
out:
|
return -ENOMEM;
|
}
|
|
static int uasp_alloc_cmd(struct f_uas *fu)
|
{
|
fu->cmd.req = usb_ep_alloc_request(fu->ep_cmd, GFP_KERNEL);
|
if (!fu->cmd.req)
|
goto err;
|
|
fu->cmd.buf = kmalloc(fu->ep_cmd->maxpacket, GFP_KERNEL);
|
if (!fu->cmd.buf)
|
goto err_buf;
|
|
fu->cmd.req->complete = uasp_cmd_complete;
|
fu->cmd.req->buf = fu->cmd.buf;
|
fu->cmd.req->length = fu->ep_cmd->maxpacket;
|
fu->cmd.req->context = fu;
|
return 0;
|
|
err_buf:
|
usb_ep_free_request(fu->ep_cmd, fu->cmd.req);
|
err:
|
return -ENOMEM;
|
}
|
|
static void uasp_setup_stream_res(struct f_uas *fu, int max_streams)
|
{
|
int i;
|
|
for (i = 0; i < max_streams; i++) {
|
struct uas_stream *s = &fu->stream[i];
|
|
s->req_in->stream_id = i + 1;
|
s->req_out->stream_id = i + 1;
|
s->req_status->stream_id = i + 1;
|
}
|
}
|
|
static int uasp_prepare_reqs(struct f_uas *fu)
|
{
|
int ret;
|
int i;
|
int max_streams;
|
|
if (fu->flags & USBG_USE_STREAMS)
|
max_streams = UASP_SS_EP_COMP_NUM_STREAMS;
|
else
|
max_streams = 1;
|
|
for (i = 0; i < max_streams; i++) {
|
ret = uasp_alloc_stream_res(fu, &fu->stream[i]);
|
if (ret)
|
goto err_cleanup;
|
}
|
|
ret = uasp_alloc_cmd(fu);
|
if (ret)
|
goto err_free_stream;
|
uasp_setup_stream_res(fu, max_streams);
|
|
ret = usb_ep_queue(fu->ep_cmd, fu->cmd.req, GFP_ATOMIC);
|
if (ret)
|
goto err_free_stream;
|
|
return 0;
|
|
err_free_stream:
|
uasp_free_cmdreq(fu);
|
|
err_cleanup:
|
if (i) {
|
do {
|
uasp_cleanup_one_stream(fu, &fu->stream[i - 1]);
|
i--;
|
} while (i);
|
}
|
pr_err("UASP: endpoint setup failed\n");
|
return ret;
|
}
|
|
static void uasp_set_alt(struct f_uas *fu)
|
{
|
struct usb_function *f = &fu->function;
|
struct usb_gadget *gadget = f->config->cdev->gadget;
|
int ret;
|
|
fu->flags = USBG_IS_UAS;
|
|
if (gadget->speed >= USB_SPEED_SUPER)
|
fu->flags |= USBG_USE_STREAMS;
|
|
config_ep_by_speed_and_alt(gadget, f, fu->ep_in, USB_G_ALT_INT_UAS);
|
ret = usb_ep_enable(fu->ep_in);
|
if (ret)
|
goto err_b_in;
|
|
config_ep_by_speed_and_alt(gadget, f, fu->ep_out, USB_G_ALT_INT_UAS);
|
ret = usb_ep_enable(fu->ep_out);
|
if (ret)
|
goto err_b_out;
|
|
config_ep_by_speed_and_alt(gadget, f, fu->ep_cmd, USB_G_ALT_INT_UAS);
|
ret = usb_ep_enable(fu->ep_cmd);
|
if (ret)
|
goto err_cmd;
|
config_ep_by_speed_and_alt(gadget, f, fu->ep_status, USB_G_ALT_INT_UAS);
|
ret = usb_ep_enable(fu->ep_status);
|
if (ret)
|
goto err_status;
|
|
ret = uasp_prepare_reqs(fu);
|
if (ret)
|
goto err_wq;
|
fu->flags |= USBG_ENABLED;
|
|
pr_info("Using the UAS protocol\n");
|
return;
|
err_wq:
|
usb_ep_disable(fu->ep_status);
|
err_status:
|
usb_ep_disable(fu->ep_cmd);
|
err_cmd:
|
usb_ep_disable(fu->ep_out);
|
err_b_out:
|
usb_ep_disable(fu->ep_in);
|
err_b_in:
|
fu->flags = 0;
|
}
|
|
static int get_cmd_dir(const unsigned char *cdb)
|
{
|
int ret;
|
|
switch (cdb[0]) {
|
case READ_6:
|
case READ_10:
|
case READ_12:
|
case READ_16:
|
case INQUIRY:
|
case MODE_SENSE:
|
case MODE_SENSE_10:
|
case SERVICE_ACTION_IN_16:
|
case MAINTENANCE_IN:
|
case PERSISTENT_RESERVE_IN:
|
case SECURITY_PROTOCOL_IN:
|
case ACCESS_CONTROL_IN:
|
case REPORT_LUNS:
|
case READ_BLOCK_LIMITS:
|
case READ_POSITION:
|
case READ_CAPACITY:
|
case READ_TOC:
|
case READ_FORMAT_CAPACITIES:
|
case REQUEST_SENSE:
|
ret = DMA_FROM_DEVICE;
|
break;
|
|
case WRITE_6:
|
case WRITE_10:
|
case WRITE_12:
|
case WRITE_16:
|
case MODE_SELECT:
|
case MODE_SELECT_10:
|
case WRITE_VERIFY:
|
case WRITE_VERIFY_12:
|
case PERSISTENT_RESERVE_OUT:
|
case MAINTENANCE_OUT:
|
case SECURITY_PROTOCOL_OUT:
|
case ACCESS_CONTROL_OUT:
|
ret = DMA_TO_DEVICE;
|
break;
|
case ALLOW_MEDIUM_REMOVAL:
|
case TEST_UNIT_READY:
|
case SYNCHRONIZE_CACHE:
|
case START_STOP:
|
case ERASE:
|
case REZERO_UNIT:
|
case SEEK_10:
|
case SPACE:
|
case VERIFY:
|
case WRITE_FILEMARKS:
|
ret = DMA_NONE;
|
break;
|
default:
|
#define CMD_DIR_MSG "target: Unknown data direction for SCSI Opcode 0x%02x\n"
|
pr_warn(CMD_DIR_MSG, cdb[0]);
|
#undef CMD_DIR_MSG
|
ret = -EINVAL;
|
}
|
return ret;
|
}
|
|
static void usbg_data_write_cmpl(struct usb_ep *ep, struct usb_request *req)
|
{
|
struct usbg_cmd *cmd = req->context;
|
struct se_cmd *se_cmd = &cmd->se_cmd;
|
|
if (req->status < 0) {
|
pr_err("%s() state %d transfer failed\n", __func__, cmd->state);
|
goto cleanup;
|
}
|
|
if (req->num_sgs == 0) {
|
sg_copy_from_buffer(se_cmd->t_data_sg,
|
se_cmd->t_data_nents,
|
cmd->data_buf,
|
se_cmd->data_length);
|
}
|
|
complete(&cmd->write_complete);
|
return;
|
|
cleanup:
|
transport_generic_free_cmd(&cmd->se_cmd, 0);
|
}
|
|
static int usbg_prepare_w_request(struct usbg_cmd *cmd, struct usb_request *req)
|
{
|
struct se_cmd *se_cmd = &cmd->se_cmd;
|
struct f_uas *fu = cmd->fu;
|
struct usb_gadget *gadget = fuas_to_gadget(fu);
|
|
if (!gadget->sg_supported) {
|
cmd->data_buf = kmalloc(se_cmd->data_length, GFP_ATOMIC);
|
if (!cmd->data_buf)
|
return -ENOMEM;
|
|
req->buf = cmd->data_buf;
|
} else {
|
req->buf = NULL;
|
req->num_sgs = se_cmd->t_data_nents;
|
req->sg = se_cmd->t_data_sg;
|
}
|
|
req->is_last = 1;
|
req->complete = usbg_data_write_cmpl;
|
req->length = se_cmd->data_length;
|
req->context = cmd;
|
return 0;
|
}
|
|
static int usbg_send_status_response(struct se_cmd *se_cmd)
|
{
|
struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd,
|
se_cmd);
|
struct f_uas *fu = cmd->fu;
|
|
if (fu->flags & USBG_IS_BOT)
|
return bot_send_status_response(cmd);
|
else
|
return uasp_send_status_response(cmd);
|
}
|
|
static int usbg_send_write_request(struct se_cmd *se_cmd)
|
{
|
struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd,
|
se_cmd);
|
struct f_uas *fu = cmd->fu;
|
|
if (fu->flags & USBG_IS_BOT)
|
return bot_send_write_request(cmd);
|
else
|
return uasp_send_write_request(cmd);
|
}
|
|
static int usbg_send_read_response(struct se_cmd *se_cmd)
|
{
|
struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd,
|
se_cmd);
|
struct f_uas *fu = cmd->fu;
|
|
if (fu->flags & USBG_IS_BOT)
|
return bot_send_read_response(cmd);
|
else
|
return uasp_send_read_response(cmd);
|
}
|
|
static void usbg_cmd_work(struct work_struct *work)
|
{
|
struct usbg_cmd *cmd = container_of(work, struct usbg_cmd, work);
|
struct se_cmd *se_cmd;
|
struct tcm_usbg_nexus *tv_nexus;
|
struct usbg_tpg *tpg;
|
int dir, flags = (TARGET_SCF_UNKNOWN_SIZE | TARGET_SCF_ACK_KREF);
|
|
se_cmd = &cmd->se_cmd;
|
tpg = cmd->fu->tpg;
|
tv_nexus = tpg->tpg_nexus;
|
dir = get_cmd_dir(cmd->cmd_buf);
|
if (dir < 0) {
|
transport_init_se_cmd(se_cmd,
|
tv_nexus->tvn_se_sess->se_tpg->se_tpg_tfo,
|
tv_nexus->tvn_se_sess, cmd->data_len, DMA_NONE,
|
cmd->prio_attr, cmd->sense_iu.sense,
|
cmd->unpacked_lun);
|
goto out;
|
}
|
|
if (target_submit_cmd(se_cmd, tv_nexus->tvn_se_sess, cmd->cmd_buf,
|
cmd->sense_iu.sense, cmd->unpacked_lun, 0,
|
cmd->prio_attr, dir, flags) < 0)
|
goto out;
|
|
return;
|
|
out:
|
transport_send_check_condition_and_sense(se_cmd,
|
TCM_UNSUPPORTED_SCSI_OPCODE, 1);
|
transport_generic_free_cmd(&cmd->se_cmd, 0);
|
}
|
|
static struct usbg_cmd *usbg_get_cmd(struct f_uas *fu,
|
struct tcm_usbg_nexus *tv_nexus, u32 scsi_tag)
|
{
|
struct se_session *se_sess = tv_nexus->tvn_se_sess;
|
struct usbg_cmd *cmd;
|
int tag, cpu;
|
|
tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
|
if (tag < 0)
|
return ERR_PTR(-ENOMEM);
|
|
cmd = &((struct usbg_cmd *)se_sess->sess_cmd_map)[tag];
|
memset(cmd, 0, sizeof(*cmd));
|
cmd->se_cmd.map_tag = tag;
|
cmd->se_cmd.map_cpu = cpu;
|
cmd->se_cmd.tag = cmd->tag = scsi_tag;
|
cmd->fu = fu;
|
|
return cmd;
|
}
|
|
static void usbg_release_cmd(struct se_cmd *);
|
|
static int usbg_submit_command(struct f_uas *fu,
|
void *cmdbuf, unsigned int len)
|
{
|
struct command_iu *cmd_iu = cmdbuf;
|
struct usbg_cmd *cmd;
|
struct usbg_tpg *tpg = fu->tpg;
|
struct tcm_usbg_nexus *tv_nexus;
|
u32 cmd_len;
|
u16 scsi_tag;
|
|
if (cmd_iu->iu_id != IU_ID_COMMAND) {
|
pr_err("Unsupported type %d\n", cmd_iu->iu_id);
|
return -EINVAL;
|
}
|
|
tv_nexus = tpg->tpg_nexus;
|
if (!tv_nexus) {
|
pr_err("Missing nexus, ignoring command\n");
|
return -EINVAL;
|
}
|
|
cmd_len = (cmd_iu->len & ~0x3) + 16;
|
if (cmd_len > USBG_MAX_CMD)
|
return -EINVAL;
|
|
scsi_tag = be16_to_cpup(&cmd_iu->tag);
|
cmd = usbg_get_cmd(fu, tv_nexus, scsi_tag);
|
if (IS_ERR(cmd)) {
|
pr_err("usbg_get_cmd failed\n");
|
return -ENOMEM;
|
}
|
memcpy(cmd->cmd_buf, cmd_iu->cdb, cmd_len);
|
|
if (fu->flags & USBG_USE_STREAMS) {
|
if (cmd->tag > UASP_SS_EP_COMP_NUM_STREAMS)
|
goto err;
|
if (!cmd->tag)
|
cmd->stream = &fu->stream[0];
|
else
|
cmd->stream = &fu->stream[cmd->tag - 1];
|
} else {
|
cmd->stream = &fu->stream[0];
|
}
|
|
switch (cmd_iu->prio_attr & 0x7) {
|
case UAS_HEAD_TAG:
|
cmd->prio_attr = TCM_HEAD_TAG;
|
break;
|
case UAS_ORDERED_TAG:
|
cmd->prio_attr = TCM_ORDERED_TAG;
|
break;
|
case UAS_ACA:
|
cmd->prio_attr = TCM_ACA_TAG;
|
break;
|
default:
|
pr_debug_once("Unsupported prio_attr: %02x.\n",
|
cmd_iu->prio_attr);
|
fallthrough;
|
case UAS_SIMPLE_TAG:
|
cmd->prio_attr = TCM_SIMPLE_TAG;
|
break;
|
}
|
|
cmd->unpacked_lun = scsilun_to_int(&cmd_iu->lun);
|
|
INIT_WORK(&cmd->work, usbg_cmd_work);
|
queue_work(tpg->workqueue, &cmd->work);
|
|
return 0;
|
err:
|
usbg_release_cmd(&cmd->se_cmd);
|
return -EINVAL;
|
}
|
|
static void bot_cmd_work(struct work_struct *work)
|
{
|
struct usbg_cmd *cmd = container_of(work, struct usbg_cmd, work);
|
struct se_cmd *se_cmd;
|
struct tcm_usbg_nexus *tv_nexus;
|
struct usbg_tpg *tpg;
|
int dir;
|
|
se_cmd = &cmd->se_cmd;
|
tpg = cmd->fu->tpg;
|
tv_nexus = tpg->tpg_nexus;
|
dir = get_cmd_dir(cmd->cmd_buf);
|
if (dir < 0) {
|
transport_init_se_cmd(se_cmd,
|
tv_nexus->tvn_se_sess->se_tpg->se_tpg_tfo,
|
tv_nexus->tvn_se_sess, cmd->data_len, DMA_NONE,
|
cmd->prio_attr, cmd->sense_iu.sense,
|
cmd->unpacked_lun);
|
goto out;
|
}
|
|
if (target_submit_cmd(se_cmd, tv_nexus->tvn_se_sess,
|
cmd->cmd_buf, cmd->sense_iu.sense, cmd->unpacked_lun,
|
cmd->data_len, cmd->prio_attr, dir, 0) < 0)
|
goto out;
|
|
return;
|
|
out:
|
transport_send_check_condition_and_sense(se_cmd,
|
TCM_UNSUPPORTED_SCSI_OPCODE, 1);
|
transport_generic_free_cmd(&cmd->se_cmd, 0);
|
}
|
|
static int bot_submit_command(struct f_uas *fu,
|
void *cmdbuf, unsigned int len)
|
{
|
struct bulk_cb_wrap *cbw = cmdbuf;
|
struct usbg_cmd *cmd;
|
struct usbg_tpg *tpg = fu->tpg;
|
struct tcm_usbg_nexus *tv_nexus;
|
u32 cmd_len;
|
|
if (cbw->Signature != cpu_to_le32(US_BULK_CB_SIGN)) {
|
pr_err("Wrong signature on CBW\n");
|
return -EINVAL;
|
}
|
if (len != 31) {
|
pr_err("Wrong length for CBW\n");
|
return -EINVAL;
|
}
|
|
cmd_len = cbw->Length;
|
if (cmd_len < 1 || cmd_len > 16)
|
return -EINVAL;
|
|
tv_nexus = tpg->tpg_nexus;
|
if (!tv_nexus) {
|
pr_err("Missing nexus, ignoring command\n");
|
return -ENODEV;
|
}
|
|
cmd = usbg_get_cmd(fu, tv_nexus, cbw->Tag);
|
if (IS_ERR(cmd)) {
|
pr_err("usbg_get_cmd failed\n");
|
return -ENOMEM;
|
}
|
memcpy(cmd->cmd_buf, cbw->CDB, cmd_len);
|
|
cmd->bot_tag = cbw->Tag;
|
cmd->prio_attr = TCM_SIMPLE_TAG;
|
cmd->unpacked_lun = cbw->Lun;
|
cmd->is_read = cbw->Flags & US_BULK_FLAG_IN ? 1 : 0;
|
cmd->data_len = le32_to_cpu(cbw->DataTransferLength);
|
cmd->se_cmd.tag = le32_to_cpu(cmd->bot_tag);
|
|
INIT_WORK(&cmd->work, bot_cmd_work);
|
queue_work(tpg->workqueue, &cmd->work);
|
|
return 0;
|
}
|
|
/* Start fabric.c code */
|
|
static int usbg_check_true(struct se_portal_group *se_tpg)
|
{
|
return 1;
|
}
|
|
static int usbg_check_false(struct se_portal_group *se_tpg)
|
{
|
return 0;
|
}
|
|
static char *usbg_get_fabric_wwn(struct se_portal_group *se_tpg)
|
{
|
struct usbg_tpg *tpg = container_of(se_tpg,
|
struct usbg_tpg, se_tpg);
|
struct usbg_tport *tport = tpg->tport;
|
|
return &tport->tport_name[0];
|
}
|
|
static u16 usbg_get_tag(struct se_portal_group *se_tpg)
|
{
|
struct usbg_tpg *tpg = container_of(se_tpg,
|
struct usbg_tpg, se_tpg);
|
return tpg->tport_tpgt;
|
}
|
|
static u32 usbg_tpg_get_inst_index(struct se_portal_group *se_tpg)
|
{
|
return 1;
|
}
|
|
static void usbg_release_cmd(struct se_cmd *se_cmd)
|
{
|
struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd,
|
se_cmd);
|
struct se_session *se_sess = se_cmd->se_sess;
|
|
kfree(cmd->data_buf);
|
target_free_tag(se_sess, se_cmd);
|
}
|
|
static u32 usbg_sess_get_index(struct se_session *se_sess)
|
{
|
return 0;
|
}
|
|
static void usbg_set_default_node_attrs(struct se_node_acl *nacl)
|
{
|
}
|
|
static int usbg_get_cmd_state(struct se_cmd *se_cmd)
|
{
|
return 0;
|
}
|
|
static void usbg_queue_tm_rsp(struct se_cmd *se_cmd)
|
{
|
}
|
|
static void usbg_aborted_task(struct se_cmd *se_cmd)
|
{
|
}
|
|
static const char *usbg_check_wwn(const char *name)
|
{
|
const char *n;
|
unsigned int len;
|
|
n = strstr(name, "naa.");
|
if (!n)
|
return NULL;
|
n += 4;
|
len = strlen(n);
|
if (len == 0 || len > USBG_NAMELEN - 1)
|
return NULL;
|
return n;
|
}
|
|
static int usbg_init_nodeacl(struct se_node_acl *se_nacl, const char *name)
|
{
|
if (!usbg_check_wwn(name))
|
return -EINVAL;
|
return 0;
|
}
|
|
static struct se_portal_group *usbg_make_tpg(struct se_wwn *wwn,
|
const char *name)
|
{
|
struct usbg_tport *tport = container_of(wwn, struct usbg_tport,
|
tport_wwn);
|
struct usbg_tpg *tpg;
|
unsigned long tpgt;
|
int ret;
|
struct f_tcm_opts *opts;
|
unsigned i;
|
|
if (strstr(name, "tpgt_") != name)
|
return ERR_PTR(-EINVAL);
|
if (kstrtoul(name + 5, 0, &tpgt) || tpgt > UINT_MAX)
|
return ERR_PTR(-EINVAL);
|
ret = -ENODEV;
|
mutex_lock(&tpg_instances_lock);
|
for (i = 0; i < TPG_INSTANCES; ++i)
|
if (tpg_instances[i].func_inst && !tpg_instances[i].tpg)
|
break;
|
if (i == TPG_INSTANCES)
|
goto unlock_inst;
|
|
opts = container_of(tpg_instances[i].func_inst, struct f_tcm_opts,
|
func_inst);
|
mutex_lock(&opts->dep_lock);
|
if (!opts->ready)
|
goto unlock_dep;
|
|
if (opts->has_dep) {
|
if (!try_module_get(opts->dependent))
|
goto unlock_dep;
|
} else {
|
ret = configfs_depend_item_unlocked(
|
wwn->wwn_group.cg_subsys,
|
&opts->func_inst.group.cg_item);
|
if (ret)
|
goto unlock_dep;
|
}
|
|
tpg = kzalloc(sizeof(struct usbg_tpg), GFP_KERNEL);
|
ret = -ENOMEM;
|
if (!tpg)
|
goto unref_dep;
|
mutex_init(&tpg->tpg_mutex);
|
atomic_set(&tpg->tpg_port_count, 0);
|
tpg->workqueue = alloc_workqueue("tcm_usb_gadget", 0, 1);
|
if (!tpg->workqueue)
|
goto free_tpg;
|
|
tpg->tport = tport;
|
tpg->tport_tpgt = tpgt;
|
|
/*
|
* SPC doesn't assign a protocol identifier for USB-SCSI, so we
|
* pretend to be SAS..
|
*/
|
ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_SAS);
|
if (ret < 0)
|
goto free_workqueue;
|
|
tpg_instances[i].tpg = tpg;
|
tpg->fi = tpg_instances[i].func_inst;
|
mutex_unlock(&opts->dep_lock);
|
mutex_unlock(&tpg_instances_lock);
|
return &tpg->se_tpg;
|
|
free_workqueue:
|
destroy_workqueue(tpg->workqueue);
|
free_tpg:
|
kfree(tpg);
|
unref_dep:
|
if (opts->has_dep)
|
module_put(opts->dependent);
|
else
|
configfs_undepend_item_unlocked(&opts->func_inst.group.cg_item);
|
unlock_dep:
|
mutex_unlock(&opts->dep_lock);
|
unlock_inst:
|
mutex_unlock(&tpg_instances_lock);
|
|
return ERR_PTR(ret);
|
}
|
|
static int tcm_usbg_drop_nexus(struct usbg_tpg *);
|
|
static void usbg_drop_tpg(struct se_portal_group *se_tpg)
|
{
|
struct usbg_tpg *tpg = container_of(se_tpg,
|
struct usbg_tpg, se_tpg);
|
unsigned i;
|
struct f_tcm_opts *opts;
|
|
tcm_usbg_drop_nexus(tpg);
|
core_tpg_deregister(se_tpg);
|
destroy_workqueue(tpg->workqueue);
|
|
mutex_lock(&tpg_instances_lock);
|
for (i = 0; i < TPG_INSTANCES; ++i)
|
if (tpg_instances[i].tpg == tpg)
|
break;
|
if (i < TPG_INSTANCES) {
|
tpg_instances[i].tpg = NULL;
|
opts = container_of(tpg_instances[i].func_inst,
|
struct f_tcm_opts, func_inst);
|
mutex_lock(&opts->dep_lock);
|
if (opts->has_dep)
|
module_put(opts->dependent);
|
else
|
configfs_undepend_item_unlocked(
|
&opts->func_inst.group.cg_item);
|
mutex_unlock(&opts->dep_lock);
|
}
|
mutex_unlock(&tpg_instances_lock);
|
|
kfree(tpg);
|
}
|
|
static struct se_wwn *usbg_make_tport(
|
struct target_fabric_configfs *tf,
|
struct config_group *group,
|
const char *name)
|
{
|
struct usbg_tport *tport;
|
const char *wnn_name;
|
u64 wwpn = 0;
|
|
wnn_name = usbg_check_wwn(name);
|
if (!wnn_name)
|
return ERR_PTR(-EINVAL);
|
|
tport = kzalloc(sizeof(struct usbg_tport), GFP_KERNEL);
|
if (!(tport))
|
return ERR_PTR(-ENOMEM);
|
|
tport->tport_wwpn = wwpn;
|
snprintf(tport->tport_name, sizeof(tport->tport_name), "%s", wnn_name);
|
return &tport->tport_wwn;
|
}
|
|
static void usbg_drop_tport(struct se_wwn *wwn)
|
{
|
struct usbg_tport *tport = container_of(wwn,
|
struct usbg_tport, tport_wwn);
|
kfree(tport);
|
}
|
|
/*
|
* If somebody feels like dropping the version property, go ahead.
|
*/
|
static ssize_t usbg_wwn_version_show(struct config_item *item, char *page)
|
{
|
return sprintf(page, "usb-gadget fabric module\n");
|
}
|
|
CONFIGFS_ATTR_RO(usbg_wwn_, version);
|
|
static struct configfs_attribute *usbg_wwn_attrs[] = {
|
&usbg_wwn_attr_version,
|
NULL,
|
};
|
|
static ssize_t tcm_usbg_tpg_enable_show(struct config_item *item, char *page)
|
{
|
struct se_portal_group *se_tpg = to_tpg(item);
|
struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg);
|
|
return snprintf(page, PAGE_SIZE, "%u\n", tpg->gadget_connect);
|
}
|
|
static int usbg_attach(struct usbg_tpg *);
|
static void usbg_detach(struct usbg_tpg *);
|
|
static ssize_t tcm_usbg_tpg_enable_store(struct config_item *item,
|
const char *page, size_t count)
|
{
|
struct se_portal_group *se_tpg = to_tpg(item);
|
struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg);
|
bool op;
|
ssize_t ret;
|
|
ret = strtobool(page, &op);
|
if (ret)
|
return ret;
|
|
if ((op && tpg->gadget_connect) || (!op && !tpg->gadget_connect))
|
return -EINVAL;
|
|
if (op)
|
ret = usbg_attach(tpg);
|
else
|
usbg_detach(tpg);
|
if (ret)
|
return ret;
|
|
tpg->gadget_connect = op;
|
|
return count;
|
}
|
|
static ssize_t tcm_usbg_tpg_nexus_show(struct config_item *item, char *page)
|
{
|
struct se_portal_group *se_tpg = to_tpg(item);
|
struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg);
|
struct tcm_usbg_nexus *tv_nexus;
|
ssize_t ret;
|
|
mutex_lock(&tpg->tpg_mutex);
|
tv_nexus = tpg->tpg_nexus;
|
if (!tv_nexus) {
|
ret = -ENODEV;
|
goto out;
|
}
|
ret = snprintf(page, PAGE_SIZE, "%s\n",
|
tv_nexus->tvn_se_sess->se_node_acl->initiatorname);
|
out:
|
mutex_unlock(&tpg->tpg_mutex);
|
return ret;
|
}
|
|
static int usbg_alloc_sess_cb(struct se_portal_group *se_tpg,
|
struct se_session *se_sess, void *p)
|
{
|
struct usbg_tpg *tpg = container_of(se_tpg,
|
struct usbg_tpg, se_tpg);
|
|
tpg->tpg_nexus = p;
|
return 0;
|
}
|
|
static int tcm_usbg_make_nexus(struct usbg_tpg *tpg, char *name)
|
{
|
struct tcm_usbg_nexus *tv_nexus;
|
int ret = 0;
|
|
mutex_lock(&tpg->tpg_mutex);
|
if (tpg->tpg_nexus) {
|
ret = -EEXIST;
|
pr_debug("tpg->tpg_nexus already exists\n");
|
goto out_unlock;
|
}
|
|
tv_nexus = kzalloc(sizeof(*tv_nexus), GFP_KERNEL);
|
if (!tv_nexus) {
|
ret = -ENOMEM;
|
goto out_unlock;
|
}
|
|
tv_nexus->tvn_se_sess = target_setup_session(&tpg->se_tpg,
|
USB_G_DEFAULT_SESSION_TAGS,
|
sizeof(struct usbg_cmd),
|
TARGET_PROT_NORMAL, name,
|
tv_nexus, usbg_alloc_sess_cb);
|
if (IS_ERR(tv_nexus->tvn_se_sess)) {
|
#define MAKE_NEXUS_MSG "core_tpg_check_initiator_node_acl() failed for %s\n"
|
pr_debug(MAKE_NEXUS_MSG, name);
|
#undef MAKE_NEXUS_MSG
|
ret = PTR_ERR(tv_nexus->tvn_se_sess);
|
kfree(tv_nexus);
|
}
|
|
out_unlock:
|
mutex_unlock(&tpg->tpg_mutex);
|
return ret;
|
}
|
|
static int tcm_usbg_drop_nexus(struct usbg_tpg *tpg)
|
{
|
struct se_session *se_sess;
|
struct tcm_usbg_nexus *tv_nexus;
|
int ret = -ENODEV;
|
|
mutex_lock(&tpg->tpg_mutex);
|
tv_nexus = tpg->tpg_nexus;
|
if (!tv_nexus)
|
goto out;
|
|
se_sess = tv_nexus->tvn_se_sess;
|
if (!se_sess)
|
goto out;
|
|
if (atomic_read(&tpg->tpg_port_count)) {
|
ret = -EPERM;
|
#define MSG "Unable to remove Host I_T Nexus with active TPG port count: %d\n"
|
pr_err(MSG, atomic_read(&tpg->tpg_port_count));
|
#undef MSG
|
goto out;
|
}
|
|
pr_debug("Removing I_T Nexus to Initiator Port: %s\n",
|
tv_nexus->tvn_se_sess->se_node_acl->initiatorname);
|
/*
|
* Release the SCSI I_T Nexus to the emulated vHost Target Port
|
*/
|
target_remove_session(se_sess);
|
tpg->tpg_nexus = NULL;
|
|
kfree(tv_nexus);
|
ret = 0;
|
out:
|
mutex_unlock(&tpg->tpg_mutex);
|
return ret;
|
}
|
|
static ssize_t tcm_usbg_tpg_nexus_store(struct config_item *item,
|
const char *page, size_t count)
|
{
|
struct se_portal_group *se_tpg = to_tpg(item);
|
struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg);
|
unsigned char i_port[USBG_NAMELEN], *ptr;
|
int ret;
|
|
if (!strncmp(page, "NULL", 4)) {
|
ret = tcm_usbg_drop_nexus(tpg);
|
return (!ret) ? count : ret;
|
}
|
if (strlen(page) >= USBG_NAMELEN) {
|
|
#define NEXUS_STORE_MSG "Emulated NAA Sas Address: %s, exceeds max: %d\n"
|
pr_err(NEXUS_STORE_MSG, page, USBG_NAMELEN);
|
#undef NEXUS_STORE_MSG
|
return -EINVAL;
|
}
|
snprintf(i_port, USBG_NAMELEN, "%s", page);
|
|
ptr = strstr(i_port, "naa.");
|
if (!ptr) {
|
pr_err("Missing 'naa.' prefix\n");
|
return -EINVAL;
|
}
|
|
if (i_port[strlen(i_port) - 1] == '\n')
|
i_port[strlen(i_port) - 1] = '\0';
|
|
ret = tcm_usbg_make_nexus(tpg, &i_port[0]);
|
if (ret < 0)
|
return ret;
|
return count;
|
}
|
|
CONFIGFS_ATTR(tcm_usbg_tpg_, enable);
|
CONFIGFS_ATTR(tcm_usbg_tpg_, nexus);
|
|
static struct configfs_attribute *usbg_base_attrs[] = {
|
&tcm_usbg_tpg_attr_enable,
|
&tcm_usbg_tpg_attr_nexus,
|
NULL,
|
};
|
|
static int usbg_port_link(struct se_portal_group *se_tpg, struct se_lun *lun)
|
{
|
struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg);
|
|
atomic_inc(&tpg->tpg_port_count);
|
smp_mb__after_atomic();
|
return 0;
|
}
|
|
static void usbg_port_unlink(struct se_portal_group *se_tpg,
|
struct se_lun *se_lun)
|
{
|
struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg);
|
|
atomic_dec(&tpg->tpg_port_count);
|
smp_mb__after_atomic();
|
}
|
|
static int usbg_check_stop_free(struct se_cmd *se_cmd)
|
{
|
return target_put_sess_cmd(se_cmd);
|
}
|
|
static const struct target_core_fabric_ops usbg_ops = {
|
.module = THIS_MODULE,
|
.fabric_name = "usb_gadget",
|
.tpg_get_wwn = usbg_get_fabric_wwn,
|
.tpg_get_tag = usbg_get_tag,
|
.tpg_check_demo_mode = usbg_check_true,
|
.tpg_check_demo_mode_cache = usbg_check_false,
|
.tpg_check_demo_mode_write_protect = usbg_check_false,
|
.tpg_check_prod_mode_write_protect = usbg_check_false,
|
.tpg_get_inst_index = usbg_tpg_get_inst_index,
|
.release_cmd = usbg_release_cmd,
|
.sess_get_index = usbg_sess_get_index,
|
.sess_get_initiator_sid = NULL,
|
.write_pending = usbg_send_write_request,
|
.set_default_node_attributes = usbg_set_default_node_attrs,
|
.get_cmd_state = usbg_get_cmd_state,
|
.queue_data_in = usbg_send_read_response,
|
.queue_status = usbg_send_status_response,
|
.queue_tm_rsp = usbg_queue_tm_rsp,
|
.aborted_task = usbg_aborted_task,
|
.check_stop_free = usbg_check_stop_free,
|
|
.fabric_make_wwn = usbg_make_tport,
|
.fabric_drop_wwn = usbg_drop_tport,
|
.fabric_make_tpg = usbg_make_tpg,
|
.fabric_drop_tpg = usbg_drop_tpg,
|
.fabric_post_link = usbg_port_link,
|
.fabric_pre_unlink = usbg_port_unlink,
|
.fabric_init_nodeacl = usbg_init_nodeacl,
|
|
.tfc_wwn_attrs = usbg_wwn_attrs,
|
.tfc_tpg_base_attrs = usbg_base_attrs,
|
};
|
|
/* Start gadget.c code */
|
|
static struct usb_interface_descriptor bot_intf_desc = {
|
.bLength = sizeof(bot_intf_desc),
|
.bDescriptorType = USB_DT_INTERFACE,
|
.bNumEndpoints = 2,
|
.bAlternateSetting = USB_G_ALT_INT_BBB,
|
.bInterfaceClass = USB_CLASS_MASS_STORAGE,
|
.bInterfaceSubClass = USB_SC_SCSI,
|
.bInterfaceProtocol = USB_PR_BULK,
|
};
|
|
static struct usb_interface_descriptor uasp_intf_desc = {
|
.bLength = sizeof(uasp_intf_desc),
|
.bDescriptorType = USB_DT_INTERFACE,
|
.bNumEndpoints = 4,
|
.bAlternateSetting = USB_G_ALT_INT_UAS,
|
.bInterfaceClass = USB_CLASS_MASS_STORAGE,
|
.bInterfaceSubClass = USB_SC_SCSI,
|
.bInterfaceProtocol = USB_PR_UAS,
|
};
|
|
static struct usb_endpoint_descriptor uasp_bi_desc = {
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
.bDescriptorType = USB_DT_ENDPOINT,
|
.bEndpointAddress = USB_DIR_IN,
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
.wMaxPacketSize = cpu_to_le16(512),
|
};
|
|
static struct usb_endpoint_descriptor uasp_fs_bi_desc = {
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
.bDescriptorType = USB_DT_ENDPOINT,
|
.bEndpointAddress = USB_DIR_IN,
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
};
|
|
static struct usb_pipe_usage_descriptor uasp_bi_pipe_desc = {
|
.bLength = sizeof(uasp_bi_pipe_desc),
|
.bDescriptorType = USB_DT_PIPE_USAGE,
|
.bPipeID = DATA_IN_PIPE_ID,
|
};
|
|
static struct usb_endpoint_descriptor uasp_ss_bi_desc = {
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
.bDescriptorType = USB_DT_ENDPOINT,
|
.bEndpointAddress = USB_DIR_IN,
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
.wMaxPacketSize = cpu_to_le16(1024),
|
};
|
|
static struct usb_ss_ep_comp_descriptor uasp_bi_ep_comp_desc = {
|
.bLength = sizeof(uasp_bi_ep_comp_desc),
|
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
|
.bMaxBurst = 0,
|
.bmAttributes = UASP_SS_EP_COMP_LOG_STREAMS,
|
.wBytesPerInterval = 0,
|
};
|
|
static struct usb_ss_ep_comp_descriptor bot_bi_ep_comp_desc = {
|
.bLength = sizeof(bot_bi_ep_comp_desc),
|
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
|
.bMaxBurst = 0,
|
};
|
|
static struct usb_endpoint_descriptor uasp_bo_desc = {
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
.bDescriptorType = USB_DT_ENDPOINT,
|
.bEndpointAddress = USB_DIR_OUT,
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
.wMaxPacketSize = cpu_to_le16(512),
|
};
|
|
static struct usb_endpoint_descriptor uasp_fs_bo_desc = {
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
.bDescriptorType = USB_DT_ENDPOINT,
|
.bEndpointAddress = USB_DIR_OUT,
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
};
|
|
static struct usb_pipe_usage_descriptor uasp_bo_pipe_desc = {
|
.bLength = sizeof(uasp_bo_pipe_desc),
|
.bDescriptorType = USB_DT_PIPE_USAGE,
|
.bPipeID = DATA_OUT_PIPE_ID,
|
};
|
|
static struct usb_endpoint_descriptor uasp_ss_bo_desc = {
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
.bDescriptorType = USB_DT_ENDPOINT,
|
.bEndpointAddress = USB_DIR_OUT,
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
.wMaxPacketSize = cpu_to_le16(0x400),
|
};
|
|
static struct usb_ss_ep_comp_descriptor uasp_bo_ep_comp_desc = {
|
.bLength = sizeof(uasp_bo_ep_comp_desc),
|
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
|
.bmAttributes = UASP_SS_EP_COMP_LOG_STREAMS,
|
};
|
|
static struct usb_ss_ep_comp_descriptor bot_bo_ep_comp_desc = {
|
.bLength = sizeof(bot_bo_ep_comp_desc),
|
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
|
};
|
|
static struct usb_endpoint_descriptor uasp_status_desc = {
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
.bDescriptorType = USB_DT_ENDPOINT,
|
.bEndpointAddress = USB_DIR_IN,
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
.wMaxPacketSize = cpu_to_le16(512),
|
};
|
|
static struct usb_endpoint_descriptor uasp_fs_status_desc = {
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
.bDescriptorType = USB_DT_ENDPOINT,
|
.bEndpointAddress = USB_DIR_IN,
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
};
|
|
static struct usb_pipe_usage_descriptor uasp_status_pipe_desc = {
|
.bLength = sizeof(uasp_status_pipe_desc),
|
.bDescriptorType = USB_DT_PIPE_USAGE,
|
.bPipeID = STATUS_PIPE_ID,
|
};
|
|
static struct usb_endpoint_descriptor uasp_ss_status_desc = {
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
.bDescriptorType = USB_DT_ENDPOINT,
|
.bEndpointAddress = USB_DIR_IN,
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
.wMaxPacketSize = cpu_to_le16(1024),
|
};
|
|
static struct usb_ss_ep_comp_descriptor uasp_status_in_ep_comp_desc = {
|
.bLength = sizeof(uasp_status_in_ep_comp_desc),
|
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
|
.bmAttributes = UASP_SS_EP_COMP_LOG_STREAMS,
|
};
|
|
static struct usb_endpoint_descriptor uasp_cmd_desc = {
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
.bDescriptorType = USB_DT_ENDPOINT,
|
.bEndpointAddress = USB_DIR_OUT,
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
.wMaxPacketSize = cpu_to_le16(512),
|
};
|
|
static struct usb_endpoint_descriptor uasp_fs_cmd_desc = {
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
.bDescriptorType = USB_DT_ENDPOINT,
|
.bEndpointAddress = USB_DIR_OUT,
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
};
|
|
static struct usb_pipe_usage_descriptor uasp_cmd_pipe_desc = {
|
.bLength = sizeof(uasp_cmd_pipe_desc),
|
.bDescriptorType = USB_DT_PIPE_USAGE,
|
.bPipeID = CMD_PIPE_ID,
|
};
|
|
static struct usb_endpoint_descriptor uasp_ss_cmd_desc = {
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
.bDescriptorType = USB_DT_ENDPOINT,
|
.bEndpointAddress = USB_DIR_OUT,
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
.wMaxPacketSize = cpu_to_le16(1024),
|
};
|
|
static struct usb_ss_ep_comp_descriptor uasp_cmd_comp_desc = {
|
.bLength = sizeof(uasp_cmd_comp_desc),
|
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
|
};
|
|
static struct usb_descriptor_header *uasp_fs_function_desc[] = {
|
(struct usb_descriptor_header *) &bot_intf_desc,
|
(struct usb_descriptor_header *) &uasp_fs_bi_desc,
|
(struct usb_descriptor_header *) &uasp_fs_bo_desc,
|
|
(struct usb_descriptor_header *) &uasp_intf_desc,
|
(struct usb_descriptor_header *) &uasp_fs_bi_desc,
|
(struct usb_descriptor_header *) &uasp_bi_pipe_desc,
|
(struct usb_descriptor_header *) &uasp_fs_bo_desc,
|
(struct usb_descriptor_header *) &uasp_bo_pipe_desc,
|
(struct usb_descriptor_header *) &uasp_fs_status_desc,
|
(struct usb_descriptor_header *) &uasp_status_pipe_desc,
|
(struct usb_descriptor_header *) &uasp_fs_cmd_desc,
|
(struct usb_descriptor_header *) &uasp_cmd_pipe_desc,
|
NULL,
|
};
|
|
static struct usb_descriptor_header *uasp_hs_function_desc[] = {
|
(struct usb_descriptor_header *) &bot_intf_desc,
|
(struct usb_descriptor_header *) &uasp_bi_desc,
|
(struct usb_descriptor_header *) &uasp_bo_desc,
|
|
(struct usb_descriptor_header *) &uasp_intf_desc,
|
(struct usb_descriptor_header *) &uasp_bi_desc,
|
(struct usb_descriptor_header *) &uasp_bi_pipe_desc,
|
(struct usb_descriptor_header *) &uasp_bo_desc,
|
(struct usb_descriptor_header *) &uasp_bo_pipe_desc,
|
(struct usb_descriptor_header *) &uasp_status_desc,
|
(struct usb_descriptor_header *) &uasp_status_pipe_desc,
|
(struct usb_descriptor_header *) &uasp_cmd_desc,
|
(struct usb_descriptor_header *) &uasp_cmd_pipe_desc,
|
NULL,
|
};
|
|
static struct usb_descriptor_header *uasp_ss_function_desc[] = {
|
(struct usb_descriptor_header *) &bot_intf_desc,
|
(struct usb_descriptor_header *) &uasp_ss_bi_desc,
|
(struct usb_descriptor_header *) &bot_bi_ep_comp_desc,
|
(struct usb_descriptor_header *) &uasp_ss_bo_desc,
|
(struct usb_descriptor_header *) &bot_bo_ep_comp_desc,
|
|
(struct usb_descriptor_header *) &uasp_intf_desc,
|
(struct usb_descriptor_header *) &uasp_ss_bi_desc,
|
(struct usb_descriptor_header *) &uasp_bi_ep_comp_desc,
|
(struct usb_descriptor_header *) &uasp_bi_pipe_desc,
|
(struct usb_descriptor_header *) &uasp_ss_bo_desc,
|
(struct usb_descriptor_header *) &uasp_bo_ep_comp_desc,
|
(struct usb_descriptor_header *) &uasp_bo_pipe_desc,
|
(struct usb_descriptor_header *) &uasp_ss_status_desc,
|
(struct usb_descriptor_header *) &uasp_status_in_ep_comp_desc,
|
(struct usb_descriptor_header *) &uasp_status_pipe_desc,
|
(struct usb_descriptor_header *) &uasp_ss_cmd_desc,
|
(struct usb_descriptor_header *) &uasp_cmd_comp_desc,
|
(struct usb_descriptor_header *) &uasp_cmd_pipe_desc,
|
NULL,
|
};
|
|
static struct usb_string tcm_us_strings[] = {
|
[USB_G_STR_INT_UAS].s = "USB Attached SCSI",
|
[USB_G_STR_INT_BBB].s = "Bulk Only Transport",
|
{ },
|
};
|
|
static struct usb_gadget_strings tcm_stringtab = {
|
.language = 0x0409,
|
.strings = tcm_us_strings,
|
};
|
|
static struct usb_gadget_strings *tcm_strings[] = {
|
&tcm_stringtab,
|
NULL,
|
};
|
|
static int tcm_bind(struct usb_configuration *c, struct usb_function *f)
|
{
|
struct f_uas *fu = to_f_uas(f);
|
struct usb_string *us;
|
struct usb_gadget *gadget = c->cdev->gadget;
|
struct usb_ep *ep;
|
struct f_tcm_opts *opts;
|
int iface;
|
int ret;
|
|
opts = container_of(f->fi, struct f_tcm_opts, func_inst);
|
|
mutex_lock(&opts->dep_lock);
|
if (!opts->can_attach) {
|
mutex_unlock(&opts->dep_lock);
|
return -ENODEV;
|
}
|
mutex_unlock(&opts->dep_lock);
|
us = usb_gstrings_attach(c->cdev, tcm_strings,
|
ARRAY_SIZE(tcm_us_strings));
|
if (IS_ERR(us))
|
return PTR_ERR(us);
|
bot_intf_desc.iInterface = us[USB_G_STR_INT_BBB].id;
|
uasp_intf_desc.iInterface = us[USB_G_STR_INT_UAS].id;
|
|
iface = usb_interface_id(c, f);
|
if (iface < 0)
|
return iface;
|
|
bot_intf_desc.bInterfaceNumber = iface;
|
uasp_intf_desc.bInterfaceNumber = iface;
|
fu->iface = iface;
|
ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_bi_desc,
|
&uasp_bi_ep_comp_desc);
|
if (!ep)
|
goto ep_fail;
|
|
fu->ep_in = ep;
|
|
ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_bo_desc,
|
&uasp_bo_ep_comp_desc);
|
if (!ep)
|
goto ep_fail;
|
fu->ep_out = ep;
|
|
ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_status_desc,
|
&uasp_status_in_ep_comp_desc);
|
if (!ep)
|
goto ep_fail;
|
fu->ep_status = ep;
|
|
ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_cmd_desc,
|
&uasp_cmd_comp_desc);
|
if (!ep)
|
goto ep_fail;
|
fu->ep_cmd = ep;
|
|
/* Assume endpoint addresses are the same for both speeds */
|
uasp_bi_desc.bEndpointAddress = uasp_ss_bi_desc.bEndpointAddress;
|
uasp_bo_desc.bEndpointAddress = uasp_ss_bo_desc.bEndpointAddress;
|
uasp_status_desc.bEndpointAddress =
|
uasp_ss_status_desc.bEndpointAddress;
|
uasp_cmd_desc.bEndpointAddress = uasp_ss_cmd_desc.bEndpointAddress;
|
|
uasp_fs_bi_desc.bEndpointAddress = uasp_ss_bi_desc.bEndpointAddress;
|
uasp_fs_bo_desc.bEndpointAddress = uasp_ss_bo_desc.bEndpointAddress;
|
uasp_fs_status_desc.bEndpointAddress =
|
uasp_ss_status_desc.bEndpointAddress;
|
uasp_fs_cmd_desc.bEndpointAddress = uasp_ss_cmd_desc.bEndpointAddress;
|
|
ret = usb_assign_descriptors(f, uasp_fs_function_desc,
|
uasp_hs_function_desc, uasp_ss_function_desc,
|
uasp_ss_function_desc);
|
if (ret)
|
goto ep_fail;
|
|
return 0;
|
ep_fail:
|
pr_err("Can't claim all required eps\n");
|
|
return -ENOTSUPP;
|
}
|
|
struct guas_setup_wq {
|
struct work_struct work;
|
struct f_uas *fu;
|
unsigned int alt;
|
};
|
|
static void tcm_delayed_set_alt(struct work_struct *wq)
|
{
|
struct guas_setup_wq *work = container_of(wq, struct guas_setup_wq,
|
work);
|
struct f_uas *fu = work->fu;
|
int alt = work->alt;
|
|
kfree(work);
|
|
if (fu->flags & USBG_IS_BOT)
|
bot_cleanup_old_alt(fu);
|
if (fu->flags & USBG_IS_UAS)
|
uasp_cleanup_old_alt(fu);
|
|
if (alt == USB_G_ALT_INT_BBB)
|
bot_set_alt(fu);
|
else if (alt == USB_G_ALT_INT_UAS)
|
uasp_set_alt(fu);
|
usb_composite_setup_continue(fu->function.config->cdev);
|
}
|
|
static int tcm_get_alt(struct usb_function *f, unsigned intf)
|
{
|
if (intf == bot_intf_desc.bInterfaceNumber)
|
return USB_G_ALT_INT_BBB;
|
if (intf == uasp_intf_desc.bInterfaceNumber)
|
return USB_G_ALT_INT_UAS;
|
|
return -EOPNOTSUPP;
|
}
|
|
static int tcm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
|
{
|
struct f_uas *fu = to_f_uas(f);
|
|
if ((alt == USB_G_ALT_INT_BBB) || (alt == USB_G_ALT_INT_UAS)) {
|
struct guas_setup_wq *work;
|
|
work = kmalloc(sizeof(*work), GFP_ATOMIC);
|
if (!work)
|
return -ENOMEM;
|
INIT_WORK(&work->work, tcm_delayed_set_alt);
|
work->fu = fu;
|
work->alt = alt;
|
schedule_work(&work->work);
|
return USB_GADGET_DELAYED_STATUS;
|
}
|
return -EOPNOTSUPP;
|
}
|
|
static void tcm_disable(struct usb_function *f)
|
{
|
struct f_uas *fu = to_f_uas(f);
|
|
if (fu->flags & USBG_IS_UAS)
|
uasp_cleanup_old_alt(fu);
|
else if (fu->flags & USBG_IS_BOT)
|
bot_cleanup_old_alt(fu);
|
fu->flags = 0;
|
}
|
|
static int tcm_setup(struct usb_function *f,
|
const struct usb_ctrlrequest *ctrl)
|
{
|
struct f_uas *fu = to_f_uas(f);
|
|
if (!(fu->flags & USBG_IS_BOT))
|
return -EOPNOTSUPP;
|
|
return usbg_bot_setup(f, ctrl);
|
}
|
|
static inline struct f_tcm_opts *to_f_tcm_opts(struct config_item *item)
|
{
|
return container_of(to_config_group(item), struct f_tcm_opts,
|
func_inst.group);
|
}
|
|
static void tcm_attr_release(struct config_item *item)
|
{
|
struct f_tcm_opts *opts = to_f_tcm_opts(item);
|
|
usb_put_function_instance(&opts->func_inst);
|
}
|
|
static struct configfs_item_operations tcm_item_ops = {
|
.release = tcm_attr_release,
|
};
|
|
static const struct config_item_type tcm_func_type = {
|
.ct_item_ops = &tcm_item_ops,
|
.ct_owner = THIS_MODULE,
|
};
|
|
static void tcm_free_inst(struct usb_function_instance *f)
|
{
|
struct f_tcm_opts *opts;
|
unsigned i;
|
|
opts = container_of(f, struct f_tcm_opts, func_inst);
|
|
mutex_lock(&tpg_instances_lock);
|
for (i = 0; i < TPG_INSTANCES; ++i)
|
if (tpg_instances[i].func_inst == f)
|
break;
|
if (i < TPG_INSTANCES)
|
tpg_instances[i].func_inst = NULL;
|
mutex_unlock(&tpg_instances_lock);
|
|
kfree(opts);
|
}
|
|
static int tcm_register_callback(struct usb_function_instance *f)
|
{
|
struct f_tcm_opts *opts = container_of(f, struct f_tcm_opts, func_inst);
|
|
mutex_lock(&opts->dep_lock);
|
opts->can_attach = true;
|
mutex_unlock(&opts->dep_lock);
|
|
return 0;
|
}
|
|
static void tcm_unregister_callback(struct usb_function_instance *f)
|
{
|
struct f_tcm_opts *opts = container_of(f, struct f_tcm_opts, func_inst);
|
|
mutex_lock(&opts->dep_lock);
|
unregister_gadget_item(opts->
|
func_inst.group.cg_item.ci_parent->ci_parent);
|
opts->can_attach = false;
|
mutex_unlock(&opts->dep_lock);
|
}
|
|
static int usbg_attach(struct usbg_tpg *tpg)
|
{
|
struct usb_function_instance *f = tpg->fi;
|
struct f_tcm_opts *opts = container_of(f, struct f_tcm_opts, func_inst);
|
|
if (opts->tcm_register_callback)
|
return opts->tcm_register_callback(f);
|
|
return 0;
|
}
|
|
static void usbg_detach(struct usbg_tpg *tpg)
|
{
|
struct usb_function_instance *f = tpg->fi;
|
struct f_tcm_opts *opts = container_of(f, struct f_tcm_opts, func_inst);
|
|
if (opts->tcm_unregister_callback)
|
opts->tcm_unregister_callback(f);
|
}
|
|
static int tcm_set_name(struct usb_function_instance *f, const char *name)
|
{
|
struct f_tcm_opts *opts = container_of(f, struct f_tcm_opts, func_inst);
|
|
pr_debug("tcm: Activating %s\n", name);
|
|
mutex_lock(&opts->dep_lock);
|
opts->ready = true;
|
mutex_unlock(&opts->dep_lock);
|
|
return 0;
|
}
|
|
static struct usb_function_instance *tcm_alloc_inst(void)
|
{
|
struct f_tcm_opts *opts;
|
int i;
|
|
|
opts = kzalloc(sizeof(*opts), GFP_KERNEL);
|
if (!opts)
|
return ERR_PTR(-ENOMEM);
|
|
mutex_lock(&tpg_instances_lock);
|
for (i = 0; i < TPG_INSTANCES; ++i)
|
if (!tpg_instances[i].func_inst)
|
break;
|
|
if (i == TPG_INSTANCES) {
|
mutex_unlock(&tpg_instances_lock);
|
kfree(opts);
|
return ERR_PTR(-EBUSY);
|
}
|
tpg_instances[i].func_inst = &opts->func_inst;
|
mutex_unlock(&tpg_instances_lock);
|
|
mutex_init(&opts->dep_lock);
|
opts->func_inst.set_inst_name = tcm_set_name;
|
opts->func_inst.free_func_inst = tcm_free_inst;
|
opts->tcm_register_callback = tcm_register_callback;
|
opts->tcm_unregister_callback = tcm_unregister_callback;
|
|
config_group_init_type_name(&opts->func_inst.group, "",
|
&tcm_func_type);
|
|
return &opts->func_inst;
|
}
|
|
static void tcm_free(struct usb_function *f)
|
{
|
struct f_uas *tcm = to_f_uas(f);
|
|
kfree(tcm);
|
}
|
|
static void tcm_unbind(struct usb_configuration *c, struct usb_function *f)
|
{
|
usb_free_all_descriptors(f);
|
}
|
|
static struct usb_function *tcm_alloc(struct usb_function_instance *fi)
|
{
|
struct f_uas *fu;
|
unsigned i;
|
|
mutex_lock(&tpg_instances_lock);
|
for (i = 0; i < TPG_INSTANCES; ++i)
|
if (tpg_instances[i].func_inst == fi)
|
break;
|
if (i == TPG_INSTANCES) {
|
mutex_unlock(&tpg_instances_lock);
|
return ERR_PTR(-ENODEV);
|
}
|
|
fu = kzalloc(sizeof(*fu), GFP_KERNEL);
|
if (!fu) {
|
mutex_unlock(&tpg_instances_lock);
|
return ERR_PTR(-ENOMEM);
|
}
|
|
fu->function.name = "Target Function";
|
fu->function.bind = tcm_bind;
|
fu->function.unbind = tcm_unbind;
|
fu->function.set_alt = tcm_set_alt;
|
fu->function.get_alt = tcm_get_alt;
|
fu->function.setup = tcm_setup;
|
fu->function.disable = tcm_disable;
|
fu->function.free_func = tcm_free;
|
fu->tpg = tpg_instances[i].tpg;
|
mutex_unlock(&tpg_instances_lock);
|
|
return &fu->function;
|
}
|
|
DECLARE_USB_FUNCTION(tcm, tcm_alloc_inst, tcm_alloc);
|
|
static int tcm_init(void)
|
{
|
int ret;
|
|
ret = usb_function_register(&tcmusb_func);
|
if (ret)
|
return ret;
|
|
ret = target_register_template(&usbg_ops);
|
if (ret)
|
usb_function_unregister(&tcmusb_func);
|
|
return ret;
|
}
|
module_init(tcm_init);
|
|
static void tcm_exit(void)
|
{
|
target_unregister_template(&usbg_ops);
|
usb_function_unregister(&tcmusb_func);
|
}
|
module_exit(tcm_exit);
|
|
MODULE_LICENSE("GPL");
|
MODULE_AUTHOR("Sebastian Andrzej Siewior");
|
