diff options
| -rw-r--r-- | drivers/usb/gadget/function/f_tcm.c | 2145 | ||||
| -rw-r--r-- | drivers/usb/gadget/function/tcm.h (renamed from drivers/usb/gadget/legacy/tcm_usb_gadget.h) | 2 | ||||
| -rw-r--r-- | drivers/usb/gadget/legacy/tcm_usb_gadget.c | 2130 |
3 files changed, 2148 insertions, 2129 deletions
diff --git a/drivers/usb/gadget/function/f_tcm.c b/drivers/usb/gadget/function/f_tcm.c new file mode 100644 index 000000000000..ce246bc2ed07 --- /dev/null +++ b/drivers/usb/gadget/function/f_tcm.c @@ -0,0 +1,2145 @@ +/* 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_tcq.h> +#include <target/target_core_base.h> +#include <target/target_core_fabric.h> +#include <asm/unaligned.h> + +#include "tcm.h" + +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; +} + +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_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); + + 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->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_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: + 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; + + 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); + cmd->se_cmd.tag = cmd->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 = 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); + case UAS_SIMPLE_TAG: + cmd->prio_attr = TCM_SIMPLE_TAG; + break; + } + + se_cmd = &cmd->se_cmd; + 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: + 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; + + 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 = TCM_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); + 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; +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 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_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); +} + +static int usbg_shutdown_session(struct se_session *se_sess) +{ + return 0; +} + +static void usbg_close_session(struct se_session *se_sess) +{ +} + +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) +{ +} + +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; +} + +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) + 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; + + /* + * 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) { + destroy_workqueue(tpg->workqueue); + kfree(tpg); + return NULL; + } + the_only_tpg_I_currently_have = tpg; + return &tpg->se_tpg; +} + +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); + + tcm_usbg_drop_nexus(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)) + 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 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) + goto err_unlock; + tv_nexus->tvn_se_sess = transport_init_session(TARGET_PROT_NORMAL); + 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) { +#define MAKE_NEXUS_MSG "core_tpg_check_initiator_node_acl() failed for %s\n" + pr_debug(MAKE_NEXUS_MSG, name); +#undef MAKE_NEXUS_MSG + goto err_session; + } + /* + * Now register the TCM vHost virtual I_T Nexus as active. + */ + 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; +#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 + */ + transport_deregister_session(tv_nexus->tvn_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) +{ + struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd, + se_cmd); + + kref_put(&cmd->ref, usbg_cmd_release); + return 1; +} + +static const struct target_core_fabric_ops usbg_ops = { + .module = THIS_MODULE, + .name = "usb_gadget", + .get_fabric_name = usbg_get_fabric_name, + .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, + .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_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_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; + + 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); + if (ret) + goto ep_fail; + + return 0; +ep_fail: + pr_err("Can't claim all required eps\n"); + + return -ENOTSUPP; +} + +static void tcm_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 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_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 int tcm_bind_config(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 = tcm_bind; + fu->function.unbind = tcm_unbind; + fu->function.set_alt = tcm_set_alt; + fu->function.setup = tcm_setup; + fu->function.disable = tcm_disable; + fu->function.strings = tcm_strings; + fu->tpg = the_only_tpg_I_currently_have; + + bot_intf_desc.iInterface = tcm_us_strings[USB_G_STR_INT_BBB].id; + uasp_intf_desc.iInterface = tcm_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; +} diff --git a/drivers/usb/gadget/legacy/tcm_usb_gadget.h b/drivers/usb/gadget/function/tcm.h index f1b69e260248..c2c3a0fd4a13 100644 --- a/drivers/usb/gadget/legacy/tcm_usb_gadget.h +++ b/drivers/usb/gadget/function/tcm.h @@ -129,4 +129,4 @@ struct f_uas { extern struct usbg_tpg *the_only_tpg_I_currently_have; -#endif +#endif /* __TARGET_USB_GADGET_H__ */ diff --git a/drivers/usb/gadget/legacy/tcm_usb_gadget.c b/drivers/usb/gadget/legacy/tcm_usb_gadget.c index 96b5d54b2a98..e6c601ab212d 100644 --- a/drivers/usb/gadget/legacy/tcm_usb_gadget.c +++ b/drivers/usb/gadget/legacy/tcm_usb_gadget.c @@ -21,1951 +21,10 @@ #include <target/target_core_fabric.h> #include <asm/unaligned.h> -#include "tcm_usb_gadget.h" - USB_GADGET_COMPOSITE_OPTIONS(); -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; -} - -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_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_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: - 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); - cmd->se_cmd.tag = cmd->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 = 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); - case UAS_SIMPLE_TAG: - cmd->prio_attr = TCM_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 = TCM_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); - cmd->se_cmd.tag = le32_to_cpu(cmd->bot_tag); - - 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 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_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 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) -{ - return; -} - -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; -} - -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) - 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; - - /* - * 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) { - destroy_workqueue(tpg->workqueue); - kfree(tpg); - return NULL; - } - the_only_tpg_I_currently_have = tpg; - return &tpg->se_tpg; -} - -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); - - tcm_usbg_drop_nexus(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)) - 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 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) - goto err_unlock; - tv_nexus->tvn_se_sess = transport_init_session(TARGET_PROT_NORMAL); - 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. - */ - 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); - 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) { - 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[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) -{ - struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd, - se_cmd); - - kref_put(&cmd->ref, usbg_cmd_release); - return 1; -} - -static const struct target_core_fabric_ops usbg_ops = { - .module = THIS_MODULE, - .name = "usb_gadget", - .get_fabric_name = usbg_get_fabric_name, - .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, - .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_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, -}; +/* #include to be removed when new function registration interface is used */ +#include "../function/f_tcm.c" #define UAS_VENDOR_ID 0x0525 /* NetChip */ #define UAS_PRODUCT_ID 0xa4a5 /* Linux-USB File-backed Storage Gadget */ @@ -2000,22 +59,6 @@ static struct usb_gadget_strings *usbg_strings[] = { 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 guas_unbind(struct usb_composite_dev *cdev) { return 0; @@ -2027,175 +70,6 @@ static struct usb_configuration usbg_config_driver = { .bmAttributes = USB_CONFIG_ATT_SELFPOWER, }; -static int tcm_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; - 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); - if (ret) - goto ep_fail; - - return 0; -ep_fail: - pr_err("Can't claim all required eps\n"); - return -ENOTSUPP; -} - -static void tcm_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 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_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 int tcm_bind_config(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 = tcm_bind; - fu->function.unbind = tcm_unbind; - fu->function.set_alt = tcm_set_alt; - fu->function.setup = tcm_setup; - fu->function.disable = tcm_disable; - fu->function.strings = tcm_strings; - fu->tpg = the_only_tpg_I_currently_have; - - bot_intf_desc.iInterface = tcm_us_strings[USB_G_STR_INT_BBB].id; - uasp_intf_desc.iInterface = tcm_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; |