![Masanari Iida](/assets/img/avatar_default.png)
Correct spelling typo in debug messages within drivers/usb. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
2476 lines
59 KiB
C
2476 lines
59 KiB
C
/* 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>
|
|
* License: GPLv2 as published by FSF.
|
|
*/
|
|
#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.h>
|
|
#include <scsi/scsi_tcq.h>
|
|
#include <target/target_core_base.h>
|
|
#include <target/target_core_fabric.h>
|
|
#include <target/target_core_fabric_configfs.h>
|
|
#include <target/target_core_configfs.h>
|
|
#include <target/configfs_macros.h>
|
|
#include <asm/unaligned.h>
|
|
|
|
#include "tcm_usb_gadget.h"
|
|
|
|
USB_GADGET_COMPOSITE_OPTIONS();
|
|
|
|
static struct target_fabric_configfs *usbg_fabric_configfs;
|
|
|
|
static inline struct f_uas *to_f_uas(struct usb_function *f)
|
|
{
|
|
return container_of(f, struct f_uas, function);
|
|
}
|
|
|
|
static void usbg_cmd_release(struct kref *);
|
|
|
|
static inline void usbg_cleanup_cmd(struct usbg_cmd *cmd)
|
|
{
|
|
kref_put(&cmd->ref, usbg_cmd_release);
|
|
}
|
|
|
|
/* 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;
|
|
|
|
usbg_cleanup_cmd(cmd);
|
|
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;
|
|
u8 *sense;
|
|
unsigned int csw_stat;
|
|
|
|
csw_stat = cmd->csw_code;
|
|
|
|
/*
|
|
* We can't send SENSE as a response. So we take ASC & ASCQ from our
|
|
* sense buffer and queue it and hope the host sends a REQUEST_SENSE
|
|
* command where it learns why we failed.
|
|
*/
|
|
sense = cmd->sense_iu.sense;
|
|
|
|
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;
|
|
}
|
|
|
|
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_out, 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(gadget, f, fu->ep_in);
|
|
ret = usb_ep_enable(fu->ep_in);
|
|
if (ret)
|
|
goto err_b_in;
|
|
|
|
config_ep_by_speed(gadget, f, fu->ep_out);
|
|
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);
|
|
break;
|
|
|
|
case US_BULK_RESET_REQUEST:
|
|
/* XXX maybe we should remove previous requests for IN + OUT */
|
|
bot_enqueue_cmd_cbw(fu);
|
|
return 0;
|
|
break;
|
|
};
|
|
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->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->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:
|
|
usbg_cleanup_cmd(cmd);
|
|
usb_ep_queue(fu->ep_cmd, fu->cmd.req, GFP_ATOMIC);
|
|
break;
|
|
|
|
default:
|
|
BUG();
|
|
};
|
|
return;
|
|
|
|
cleanup:
|
|
usbg_cleanup_cmd(cmd);
|
|
}
|
|
|
|
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_status, stream->req_status);
|
|
stream->req_status = NULL;
|
|
err_out:
|
|
usb_ep_free_request(fu->ep_out, stream->req_out);
|
|
stream->req_out = 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(gadget, f, fu->ep_in);
|
|
ret = usb_ep_enable(fu->ep_in);
|
|
if (ret)
|
|
goto err_b_in;
|
|
|
|
config_ep_by_speed(gadget, f, fu->ep_out);
|
|
ret = usb_ep_enable(fu->ep_out);
|
|
if (ret)
|
|
goto err_b_out;
|
|
|
|
config_ep_by_speed(gadget, f, fu->ep_cmd);
|
|
ret = usb_ep_enable(fu->ep_cmd);
|
|
if (ret)
|
|
goto err_cmd;
|
|
config_ep_by_speed(gadget, f, fu->ep_status);
|
|
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:
|
|
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:
|
|
pr_warn("target: Unknown data direction for SCSI Opcode "
|
|
"0x%02x\n", cdb[0]);
|
|
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:
|
|
usbg_cleanup_cmd(cmd);
|
|
}
|
|
|
|
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->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;
|
|
|
|
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);
|
|
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, TARGET_SCF_UNKNOWN_SIZE) < 0)
|
|
goto out;
|
|
|
|
return;
|
|
|
|
out:
|
|
transport_send_check_condition_and_sense(se_cmd,
|
|
TCM_UNSUPPORTED_SCSI_OPCODE, 1);
|
|
usbg_cleanup_cmd(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;
|
|
struct se_cmd *se_cmd;
|
|
struct tcm_usbg_nexus *tv_nexus;
|
|
u32 cmd_len;
|
|
int ret;
|
|
|
|
if (cmd_iu->iu_id != IU_ID_COMMAND) {
|
|
pr_err("Unsupported type %d\n", cmd_iu->iu_id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
cmd = kzalloc(sizeof *cmd, GFP_ATOMIC);
|
|
if (!cmd)
|
|
return -ENOMEM;
|
|
|
|
cmd->fu = fu;
|
|
|
|
/* XXX until I figure out why I can't free in on complete */
|
|
kref_init(&cmd->ref);
|
|
kref_get(&cmd->ref);
|
|
|
|
tpg = fu->tpg;
|
|
cmd_len = (cmd_iu->len & ~0x3) + 16;
|
|
if (cmd_len > USBG_MAX_CMD)
|
|
goto err;
|
|
|
|
memcpy(cmd->cmd_buf, cmd_iu->cdb, cmd_len);
|
|
|
|
cmd->tag = be16_to_cpup(&cmd_iu->tag);
|
|
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];
|
|
}
|
|
|
|
tv_nexus = tpg->tpg_nexus;
|
|
if (!tv_nexus) {
|
|
pr_err("Missing nexus, ignoring command\n");
|
|
goto err;
|
|
}
|
|
|
|
switch (cmd_iu->prio_attr & 0x7) {
|
|
case UAS_HEAD_TAG:
|
|
cmd->prio_attr = MSG_HEAD_TAG;
|
|
break;
|
|
case UAS_ORDERED_TAG:
|
|
cmd->prio_attr = MSG_ORDERED_TAG;
|
|
break;
|
|
case UAS_ACA:
|
|
cmd->prio_attr = MSG_ACA_TAG;
|
|
break;
|
|
default:
|
|
pr_debug_once("Unsupported prio_attr: %02x.\n",
|
|
cmd_iu->prio_attr);
|
|
case UAS_SIMPLE_TAG:
|
|
cmd->prio_attr = MSG_SIMPLE_TAG;
|
|
break;
|
|
}
|
|
|
|
se_cmd = &cmd->se_cmd;
|
|
cmd->unpacked_lun = scsilun_to_int(&cmd_iu->lun);
|
|
|
|
INIT_WORK(&cmd->work, usbg_cmd_work);
|
|
ret = queue_work(tpg->workqueue, &cmd->work);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
return 0;
|
|
err:
|
|
kfree(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);
|
|
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);
|
|
usbg_cleanup_cmd(cmd);
|
|
}
|
|
|
|
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;
|
|
struct se_cmd *se_cmd;
|
|
struct tcm_usbg_nexus *tv_nexus;
|
|
u32 cmd_len;
|
|
int ret;
|
|
|
|
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;
|
|
|
|
cmd = kzalloc(sizeof *cmd, GFP_ATOMIC);
|
|
if (!cmd)
|
|
return -ENOMEM;
|
|
|
|
cmd->fu = fu;
|
|
|
|
/* XXX until I figure out why I can't free in on complete */
|
|
kref_init(&cmd->ref);
|
|
kref_get(&cmd->ref);
|
|
|
|
tpg = fu->tpg;
|
|
|
|
memcpy(cmd->cmd_buf, cbw->CDB, cmd_len);
|
|
|
|
cmd->bot_tag = cbw->Tag;
|
|
|
|
tv_nexus = tpg->tpg_nexus;
|
|
if (!tv_nexus) {
|
|
pr_err("Missing nexus, ignoring command\n");
|
|
goto err;
|
|
}
|
|
|
|
cmd->prio_attr = MSG_SIMPLE_TAG;
|
|
se_cmd = &cmd->se_cmd;
|
|
cmd->unpacked_lun = cbw->Lun;
|
|
cmd->is_read = cbw->Flags & US_BULK_FLAG_IN ? 1 : 0;
|
|
cmd->data_len = le32_to_cpu(cbw->DataTransferLength);
|
|
|
|
INIT_WORK(&cmd->work, bot_cmd_work);
|
|
ret = queue_work(tpg->workqueue, &cmd->work);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
return 0;
|
|
err:
|
|
kfree(cmd);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* 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_name(void)
|
|
{
|
|
return "usb_gadget";
|
|
}
|
|
|
|
static u8 usbg_get_fabric_proto_ident(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;
|
|
u8 proto_id;
|
|
|
|
switch (tport->tport_proto_id) {
|
|
case SCSI_PROTOCOL_SAS:
|
|
default:
|
|
proto_id = sas_get_fabric_proto_ident(se_tpg);
|
|
break;
|
|
}
|
|
|
|
return proto_id;
|
|
}
|
|
|
|
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_get_default_depth(struct se_portal_group *se_tpg)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static u32 usbg_get_pr_transport_id(
|
|
struct se_portal_group *se_tpg,
|
|
struct se_node_acl *se_nacl,
|
|
struct t10_pr_registration *pr_reg,
|
|
int *format_code,
|
|
unsigned char *buf)
|
|
{
|
|
struct usbg_tpg *tpg = container_of(se_tpg,
|
|
struct usbg_tpg, se_tpg);
|
|
struct usbg_tport *tport = tpg->tport;
|
|
int ret = 0;
|
|
|
|
switch (tport->tport_proto_id) {
|
|
case SCSI_PROTOCOL_SAS:
|
|
default:
|
|
ret = sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg,
|
|
format_code, buf);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static u32 usbg_get_pr_transport_id_len(
|
|
struct se_portal_group *se_tpg,
|
|
struct se_node_acl *se_nacl,
|
|
struct t10_pr_registration *pr_reg,
|
|
int *format_code)
|
|
{
|
|
struct usbg_tpg *tpg = container_of(se_tpg,
|
|
struct usbg_tpg, se_tpg);
|
|
struct usbg_tport *tport = tpg->tport;
|
|
int ret = 0;
|
|
|
|
switch (tport->tport_proto_id) {
|
|
case SCSI_PROTOCOL_SAS:
|
|
default:
|
|
ret = sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,
|
|
format_code);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static char *usbg_parse_pr_out_transport_id(
|
|
struct se_portal_group *se_tpg,
|
|
const char *buf,
|
|
u32 *out_tid_len,
|
|
char **port_nexus_ptr)
|
|
{
|
|
struct usbg_tpg *tpg = container_of(se_tpg,
|
|
struct usbg_tpg, se_tpg);
|
|
struct usbg_tport *tport = tpg->tport;
|
|
char *tid = NULL;
|
|
|
|
switch (tport->tport_proto_id) {
|
|
case SCSI_PROTOCOL_SAS:
|
|
default:
|
|
tid = sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,
|
|
port_nexus_ptr);
|
|
}
|
|
|
|
return tid;
|
|
}
|
|
|
|
static struct se_node_acl *usbg_alloc_fabric_acl(struct se_portal_group *se_tpg)
|
|
{
|
|
struct usbg_nacl *nacl;
|
|
|
|
nacl = kzalloc(sizeof(struct usbg_nacl), GFP_KERNEL);
|
|
if (!nacl) {
|
|
printk(KERN_ERR "Unable to allocate struct usbg_nacl\n");
|
|
return NULL;
|
|
}
|
|
|
|
return &nacl->se_node_acl;
|
|
}
|
|
|
|
static void usbg_release_fabric_acl(
|
|
struct se_portal_group *se_tpg,
|
|
struct se_node_acl *se_nacl)
|
|
{
|
|
struct usbg_nacl *nacl = container_of(se_nacl,
|
|
struct usbg_nacl, se_node_acl);
|
|
kfree(nacl);
|
|
}
|
|
|
|
static u32 usbg_tpg_get_inst_index(struct se_portal_group *se_tpg)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static void usbg_cmd_release(struct kref *ref)
|
|
{
|
|
struct usbg_cmd *cmd = container_of(ref, struct usbg_cmd,
|
|
ref);
|
|
|
|
transport_generic_free_cmd(&cmd->se_cmd, 0);
|
|
}
|
|
|
|
static void usbg_release_cmd(struct se_cmd *se_cmd)
|
|
{
|
|
struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd,
|
|
se_cmd);
|
|
kfree(cmd->data_buf);
|
|
kfree(cmd);
|
|
return;
|
|
}
|
|
|
|
static int usbg_shutdown_session(struct se_session *se_sess)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void usbg_close_session(struct se_session *se_sess)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static u32 usbg_sess_get_index(struct se_session *se_sess)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* XXX Error recovery: return != 0 if we expect writes. Dunno when that could be
|
|
*/
|
|
static int usbg_write_pending_status(struct se_cmd *se_cmd)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void usbg_set_default_node_attrs(struct se_node_acl *nacl)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static u32 usbg_get_task_tag(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 le32_to_cpu(cmd->bot_tag);
|
|
else
|
|
return cmd->tag;
|
|
}
|
|
|
|
static int usbg_get_cmd_state(struct se_cmd *se_cmd)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int usbg_queue_tm_rsp(struct se_cmd *se_cmd)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
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 struct se_node_acl *usbg_make_nodeacl(
|
|
struct se_portal_group *se_tpg,
|
|
struct config_group *group,
|
|
const char *name)
|
|
{
|
|
struct se_node_acl *se_nacl, *se_nacl_new;
|
|
struct usbg_nacl *nacl;
|
|
u64 wwpn = 0;
|
|
u32 nexus_depth;
|
|
const char *wnn_name;
|
|
|
|
wnn_name = usbg_check_wwn(name);
|
|
if (!wnn_name)
|
|
return ERR_PTR(-EINVAL);
|
|
se_nacl_new = usbg_alloc_fabric_acl(se_tpg);
|
|
if (!(se_nacl_new))
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
nexus_depth = 1;
|
|
/*
|
|
* se_nacl_new may be released by core_tpg_add_initiator_node_acl()
|
|
* when converting a NodeACL from demo mode -> explict
|
|
*/
|
|
se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new,
|
|
name, nexus_depth);
|
|
if (IS_ERR(se_nacl)) {
|
|
usbg_release_fabric_acl(se_tpg, se_nacl_new);
|
|
return se_nacl;
|
|
}
|
|
/*
|
|
* Locate our struct usbg_nacl and set the FC Nport WWPN
|
|
*/
|
|
nacl = container_of(se_nacl, struct usbg_nacl, se_node_acl);
|
|
nacl->iport_wwpn = wwpn;
|
|
snprintf(nacl->iport_name, sizeof(nacl->iport_name), "%s", name);
|
|
return se_nacl;
|
|
}
|
|
|
|
static void usbg_drop_nodeacl(struct se_node_acl *se_acl)
|
|
{
|
|
struct usbg_nacl *nacl = container_of(se_acl,
|
|
struct usbg_nacl, se_node_acl);
|
|
core_tpg_del_initiator_node_acl(se_acl->se_tpg, se_acl, 1);
|
|
kfree(nacl);
|
|
}
|
|
|
|
struct usbg_tpg *the_only_tpg_I_currently_have;
|
|
|
|
static struct se_portal_group *usbg_make_tpg(
|
|
struct se_wwn *wwn,
|
|
struct config_group *group,
|
|
const char *name)
|
|
{
|
|
struct usbg_tport *tport = container_of(wwn, struct usbg_tport,
|
|
tport_wwn);
|
|
struct usbg_tpg *tpg;
|
|
unsigned long tpgt;
|
|
int ret;
|
|
|
|
if (strstr(name, "tpgt_") != name)
|
|
return ERR_PTR(-EINVAL);
|
|
if (kstrtoul(name + 5, 0, &tpgt) || tpgt > UINT_MAX)
|
|
return ERR_PTR(-EINVAL);
|
|
if (the_only_tpg_I_currently_have) {
|
|
pr_err("Until the gadget framework can't handle multiple\n");
|
|
pr_err("gadgets, you can't do this here.\n");
|
|
return ERR_PTR(-EBUSY);
|
|
}
|
|
|
|
tpg = kzalloc(sizeof(struct usbg_tpg), GFP_KERNEL);
|
|
if (!tpg) {
|
|
printk(KERN_ERR "Unable to allocate struct usbg_tpg");
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
mutex_init(&tpg->tpg_mutex);
|
|
atomic_set(&tpg->tpg_port_count, 0);
|
|
tpg->workqueue = alloc_workqueue("tcm_usb_gadget", 0, 1);
|
|
if (!tpg->workqueue) {
|
|
kfree(tpg);
|
|
return NULL;
|
|
}
|
|
|
|
tpg->tport = tport;
|
|
tpg->tport_tpgt = tpgt;
|
|
|
|
ret = core_tpg_register(&usbg_fabric_configfs->tf_ops, wwn,
|
|
&tpg->se_tpg, tpg,
|
|
TRANSPORT_TPG_TYPE_NORMAL);
|
|
if (ret < 0) {
|
|
destroy_workqueue(tpg->workqueue);
|
|
kfree(tpg);
|
|
return NULL;
|
|
}
|
|
the_only_tpg_I_currently_have = tpg;
|
|
return &tpg->se_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);
|
|
|
|
core_tpg_deregister(se_tpg);
|
|
destroy_workqueue(tpg->workqueue);
|
|
kfree(tpg);
|
|
the_only_tpg_I_currently_have = NULL;
|
|
}
|
|
|
|
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)) {
|
|
printk(KERN_ERR "Unable to allocate struct usbg_tport");
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
tport->tport_wwpn = wwpn;
|
|
snprintf(tport->tport_name, sizeof(tport->tport_name), 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_show_attr_version(
|
|
struct target_fabric_configfs *tf,
|
|
char *page)
|
|
{
|
|
return sprintf(page, "usb-gadget fabric module\n");
|
|
}
|
|
TF_WWN_ATTR_RO(usbg, version);
|
|
|
|
static struct configfs_attribute *usbg_wwn_attrs[] = {
|
|
&usbg_wwn_version.attr,
|
|
NULL,
|
|
};
|
|
|
|
static ssize_t tcm_usbg_tpg_show_enable(
|
|
struct se_portal_group *se_tpg,
|
|
char *page)
|
|
{
|
|
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_store_enable(
|
|
struct se_portal_group *se_tpg,
|
|
const char *page,
|
|
size_t count)
|
|
{
|
|
struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg);
|
|
unsigned long op;
|
|
ssize_t ret;
|
|
|
|
ret = kstrtoul(page, 0, &op);
|
|
if (ret < 0)
|
|
return -EINVAL;
|
|
if (op > 1)
|
|
return -EINVAL;
|
|
|
|
if (op && tpg->gadget_connect)
|
|
goto out;
|
|
if (!op && !tpg->gadget_connect)
|
|
goto out;
|
|
|
|
if (op) {
|
|
ret = usbg_attach(tpg);
|
|
if (ret)
|
|
goto out;
|
|
} else {
|
|
usbg_detach(tpg);
|
|
}
|
|
tpg->gadget_connect = op;
|
|
out:
|
|
return count;
|
|
}
|
|
TF_TPG_BASE_ATTR(tcm_usbg, enable, S_IRUGO | S_IWUSR);
|
|
|
|
static ssize_t tcm_usbg_tpg_show_nexus(
|
|
struct se_portal_group *se_tpg,
|
|
char *page)
|
|
{
|
|
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 tcm_usbg_make_nexus(struct usbg_tpg *tpg, char *name)
|
|
{
|
|
struct se_portal_group *se_tpg;
|
|
struct tcm_usbg_nexus *tv_nexus;
|
|
int ret;
|
|
|
|
mutex_lock(&tpg->tpg_mutex);
|
|
if (tpg->tpg_nexus) {
|
|
ret = -EEXIST;
|
|
pr_debug("tpg->tpg_nexus already exists\n");
|
|
goto err_unlock;
|
|
}
|
|
se_tpg = &tpg->se_tpg;
|
|
|
|
ret = -ENOMEM;
|
|
tv_nexus = kzalloc(sizeof(*tv_nexus), GFP_KERNEL);
|
|
if (!tv_nexus) {
|
|
pr_err("Unable to allocate struct tcm_vhost_nexus\n");
|
|
goto err_unlock;
|
|
}
|
|
tv_nexus->tvn_se_sess = transport_init_session();
|
|
if (IS_ERR(tv_nexus->tvn_se_sess))
|
|
goto err_free;
|
|
|
|
/*
|
|
* Since we are running in 'demo mode' this call with generate a
|
|
* struct se_node_acl for the tcm_vhost struct se_portal_group with
|
|
* the SCSI Initiator port name of the passed configfs group 'name'.
|
|
*/
|
|
tv_nexus->tvn_se_sess->se_node_acl = core_tpg_check_initiator_node_acl(
|
|
se_tpg, name);
|
|
if (!tv_nexus->tvn_se_sess->se_node_acl) {
|
|
pr_debug("core_tpg_check_initiator_node_acl() failed"
|
|
" for %s\n", name);
|
|
goto err_session;
|
|
}
|
|
/*
|
|
* Now register the TCM vHost virtual I_T Nexus as active with the
|
|
* call to __transport_register_session()
|
|
*/
|
|
__transport_register_session(se_tpg, tv_nexus->tvn_se_sess->se_node_acl,
|
|
tv_nexus->tvn_se_sess, tv_nexus);
|
|
tpg->tpg_nexus = tv_nexus;
|
|
mutex_unlock(&tpg->tpg_mutex);
|
|
return 0;
|
|
|
|
err_session:
|
|
transport_free_session(tv_nexus->tvn_se_sess);
|
|
err_free:
|
|
kfree(tv_nexus);
|
|
err_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;
|
|
pr_err("Unable to remove Host I_T Nexus with"
|
|
" active TPG port count: %d\n",
|
|
atomic_read(&tpg->tpg_port_count));
|
|
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
|
|
*/
|
|
transport_deregister_session(tv_nexus->tvn_se_sess);
|
|
tpg->tpg_nexus = NULL;
|
|
|
|
kfree(tv_nexus);
|
|
out:
|
|
mutex_unlock(&tpg->tpg_mutex);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t tcm_usbg_tpg_store_nexus(
|
|
struct se_portal_group *se_tpg,
|
|
const char *page,
|
|
size_t count)
|
|
{
|
|
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) {
|
|
pr_err("Emulated NAA Sas Address: %s, exceeds"
|
|
" max: %d\n", page, USBG_NAMELEN);
|
|
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[4]);
|
|
if (ret < 0)
|
|
return ret;
|
|
return count;
|
|
}
|
|
TF_TPG_BASE_ATTR(tcm_usbg, nexus, S_IRUGO | S_IWUSR);
|
|
|
|
static struct configfs_attribute *usbg_base_attrs[] = {
|
|
&tcm_usbg_tpg_enable.attr,
|
|
&tcm_usbg_tpg_nexus.attr,
|
|
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_inc();
|
|
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_dec();
|
|
}
|
|
|
|
static int usbg_check_stop_free(struct se_cmd *se_cmd)
|
|
{
|
|
struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd,
|
|
se_cmd);
|
|
|
|
kref_put(&cmd->ref, usbg_cmd_release);
|
|
return 1;
|
|
}
|
|
|
|
static struct target_core_fabric_ops usbg_ops = {
|
|
.get_fabric_name = usbg_get_fabric_name,
|
|
.get_fabric_proto_ident = usbg_get_fabric_proto_ident,
|
|
.tpg_get_wwn = usbg_get_fabric_wwn,
|
|
.tpg_get_tag = usbg_get_tag,
|
|
.tpg_get_default_depth = usbg_get_default_depth,
|
|
.tpg_get_pr_transport_id = usbg_get_pr_transport_id,
|
|
.tpg_get_pr_transport_id_len = usbg_get_pr_transport_id_len,
|
|
.tpg_parse_pr_out_transport_id = usbg_parse_pr_out_transport_id,
|
|
.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_alloc_fabric_acl = usbg_alloc_fabric_acl,
|
|
.tpg_release_fabric_acl = usbg_release_fabric_acl,
|
|
.tpg_get_inst_index = usbg_tpg_get_inst_index,
|
|
.release_cmd = usbg_release_cmd,
|
|
.shutdown_session = usbg_shutdown_session,
|
|
.close_session = usbg_close_session,
|
|
.sess_get_index = usbg_sess_get_index,
|
|
.sess_get_initiator_sid = NULL,
|
|
.write_pending = usbg_send_write_request,
|
|
.write_pending_status = usbg_write_pending_status,
|
|
.set_default_node_attributes = usbg_set_default_node_attrs,
|
|
.get_task_tag = usbg_get_task_tag,
|
|
.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,
|
|
.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_make_np = NULL,
|
|
.fabric_drop_np = NULL,
|
|
.fabric_make_nodeacl = usbg_make_nodeacl,
|
|
.fabric_drop_nodeacl = usbg_drop_nodeacl,
|
|
};
|
|
|
|
static int usbg_register_configfs(void)
|
|
{
|
|
struct target_fabric_configfs *fabric;
|
|
int ret;
|
|
|
|
fabric = target_fabric_configfs_init(THIS_MODULE, "usb_gadget");
|
|
if (IS_ERR(fabric)) {
|
|
printk(KERN_ERR "target_fabric_configfs_init() failed\n");
|
|
return PTR_ERR(fabric);
|
|
}
|
|
|
|
fabric->tf_ops = usbg_ops;
|
|
TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = usbg_wwn_attrs;
|
|
TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = usbg_base_attrs;
|
|
TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL;
|
|
TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL;
|
|
TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL;
|
|
TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = NULL;
|
|
TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;
|
|
TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL;
|
|
TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL;
|
|
ret = target_fabric_configfs_register(fabric);
|
|
if (ret < 0) {
|
|
printk(KERN_ERR "target_fabric_configfs_register() failed"
|
|
" for usb-gadget\n");
|
|
return ret;
|
|
}
|
|
usbg_fabric_configfs = fabric;
|
|
return 0;
|
|
};
|
|
|
|
static void usbg_deregister_configfs(void)
|
|
{
|
|
if (!(usbg_fabric_configfs))
|
|
return;
|
|
|
|
target_fabric_configfs_deregister(usbg_fabric_configfs);
|
|
usbg_fabric_configfs = NULL;
|
|
};
|
|
|
|
/* 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,
|
|
};
|
|
|
|
#define UAS_VENDOR_ID 0x0525 /* NetChip */
|
|
#define UAS_PRODUCT_ID 0xa4a5 /* Linux-USB File-backed Storage Gadget */
|
|
|
|
static struct usb_device_descriptor usbg_device_desc = {
|
|
.bLength = sizeof(usbg_device_desc),
|
|
.bDescriptorType = USB_DT_DEVICE,
|
|
.bcdUSB = cpu_to_le16(0x0200),
|
|
.bDeviceClass = USB_CLASS_PER_INTERFACE,
|
|
.idVendor = cpu_to_le16(UAS_VENDOR_ID),
|
|
.idProduct = cpu_to_le16(UAS_PRODUCT_ID),
|
|
.bNumConfigurations = 1,
|
|
};
|
|
|
|
static struct usb_string usbg_us_strings[] = {
|
|
[USB_GADGET_MANUFACTURER_IDX].s = "Target Manufactor",
|
|
[USB_GADGET_PRODUCT_IDX].s = "Target Product",
|
|
[USB_GADGET_SERIAL_IDX].s = "000000000001",
|
|
[USB_G_STR_CONFIG].s = "default config",
|
|
[USB_G_STR_INT_UAS].s = "USB Attached SCSI",
|
|
[USB_G_STR_INT_BBB].s = "Bulk Only Transport",
|
|
{ },
|
|
};
|
|
|
|
static struct usb_gadget_strings usbg_stringtab = {
|
|
.language = 0x0409,
|
|
.strings = usbg_us_strings,
|
|
};
|
|
|
|
static struct usb_gadget_strings *usbg_strings[] = {
|
|
&usbg_stringtab,
|
|
NULL,
|
|
};
|
|
|
|
static int guas_unbind(struct usb_composite_dev *cdev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static struct usb_configuration usbg_config_driver = {
|
|
.label = "Linux Target",
|
|
.bConfigurationValue = 1,
|
|
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
|
|
};
|
|
|
|
static void give_back_ep(struct usb_ep **pep)
|
|
{
|
|
struct usb_ep *ep = *pep;
|
|
if (!ep)
|
|
return;
|
|
ep->driver_data = NULL;
|
|
}
|
|
|
|
static int usbg_bind(struct usb_configuration *c, struct usb_function *f)
|
|
{
|
|
struct f_uas *fu = to_f_uas(f);
|
|
struct usb_gadget *gadget = c->cdev->gadget;
|
|
struct usb_ep *ep;
|
|
int iface;
|
|
int ret;
|
|
|
|
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;
|
|
|
|
ep->driver_data = fu;
|
|
fu->ep_in = ep;
|
|
|
|
ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_bo_desc,
|
|
&uasp_bo_ep_comp_desc);
|
|
if (!ep)
|
|
goto ep_fail;
|
|
ep->driver_data = fu;
|
|
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;
|
|
ep->driver_data = fu;
|
|
fu->ep_status = ep;
|
|
|
|
ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_cmd_desc,
|
|
&uasp_cmd_comp_desc);
|
|
if (!ep)
|
|
goto ep_fail;
|
|
ep->driver_data = fu;
|
|
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);
|
|
if (ret)
|
|
goto ep_fail;
|
|
|
|
return 0;
|
|
ep_fail:
|
|
pr_err("Can't claim all required eps\n");
|
|
|
|
give_back_ep(&fu->ep_in);
|
|
give_back_ep(&fu->ep_out);
|
|
give_back_ep(&fu->ep_status);
|
|
give_back_ep(&fu->ep_cmd);
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static void usbg_unbind(struct usb_configuration *c, struct usb_function *f)
|
|
{
|
|
struct f_uas *fu = to_f_uas(f);
|
|
|
|
usb_free_all_descriptors(f);
|
|
kfree(fu);
|
|
}
|
|
|
|
struct guas_setup_wq {
|
|
struct work_struct work;
|
|
struct f_uas *fu;
|
|
unsigned int alt;
|
|
};
|
|
|
|
static void usbg_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 usbg_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, usbg_delayed_set_alt);
|
|
work->fu = fu;
|
|
work->alt = alt;
|
|
schedule_work(&work->work);
|
|
return USB_GADGET_DELAYED_STATUS;
|
|
}
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static void usbg_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 usbg_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 int usbg_cfg_bind(struct usb_configuration *c)
|
|
{
|
|
struct f_uas *fu;
|
|
int ret;
|
|
|
|
fu = kzalloc(sizeof(*fu), GFP_KERNEL);
|
|
if (!fu)
|
|
return -ENOMEM;
|
|
fu->function.name = "Target Function";
|
|
fu->function.bind = usbg_bind;
|
|
fu->function.unbind = usbg_unbind;
|
|
fu->function.set_alt = usbg_set_alt;
|
|
fu->function.setup = usbg_setup;
|
|
fu->function.disable = usbg_disable;
|
|
fu->tpg = the_only_tpg_I_currently_have;
|
|
|
|
bot_intf_desc.iInterface = usbg_us_strings[USB_G_STR_INT_BBB].id;
|
|
uasp_intf_desc.iInterface = usbg_us_strings[USB_G_STR_INT_UAS].id;
|
|
|
|
ret = usb_add_function(c, &fu->function);
|
|
if (ret)
|
|
goto err;
|
|
|
|
return 0;
|
|
err:
|
|
kfree(fu);
|
|
return ret;
|
|
}
|
|
|
|
static int usb_target_bind(struct usb_composite_dev *cdev)
|
|
{
|
|
int ret;
|
|
|
|
ret = usb_string_ids_tab(cdev, usbg_us_strings);
|
|
if (ret)
|
|
return ret;
|
|
|
|
usbg_device_desc.iManufacturer =
|
|
usbg_us_strings[USB_GADGET_MANUFACTURER_IDX].id;
|
|
usbg_device_desc.iProduct = usbg_us_strings[USB_GADGET_PRODUCT_IDX].id;
|
|
usbg_device_desc.iSerialNumber =
|
|
usbg_us_strings[USB_GADGET_SERIAL_IDX].id;
|
|
usbg_config_driver.iConfiguration =
|
|
usbg_us_strings[USB_G_STR_CONFIG].id;
|
|
|
|
ret = usb_add_config(cdev, &usbg_config_driver,
|
|
usbg_cfg_bind);
|
|
if (ret)
|
|
return ret;
|
|
usb_composite_overwrite_options(cdev, &coverwrite);
|
|
return 0;
|
|
}
|
|
|
|
static __refdata struct usb_composite_driver usbg_driver = {
|
|
.name = "g_target",
|
|
.dev = &usbg_device_desc,
|
|
.strings = usbg_strings,
|
|
.max_speed = USB_SPEED_SUPER,
|
|
.bind = usb_target_bind,
|
|
.unbind = guas_unbind,
|
|
};
|
|
|
|
static int usbg_attach(struct usbg_tpg *tpg)
|
|
{
|
|
return usb_composite_probe(&usbg_driver);
|
|
}
|
|
|
|
static void usbg_detach(struct usbg_tpg *tpg)
|
|
{
|
|
usb_composite_unregister(&usbg_driver);
|
|
}
|
|
|
|
static int __init usb_target_gadget_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = usbg_register_configfs();
|
|
return ret;
|
|
}
|
|
module_init(usb_target_gadget_init);
|
|
|
|
static void __exit usb_target_gadget_exit(void)
|
|
{
|
|
usbg_deregister_configfs();
|
|
}
|
|
module_exit(usb_target_gadget_exit);
|
|
|
|
MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");
|
|
MODULE_DESCRIPTION("usb-gadget fabric");
|
|
MODULE_LICENSE("GPL v2");
|