Prepare for converting tcm to new function registration interface.
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
--- /dev/null
+/* 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;
+}
--- /dev/null
+#ifndef __TARGET_USB_GADGET_H__
+#define __TARGET_USB_GADGET_H__
+
+#include <linux/kref.h>
+/* #include <linux/usb/uas.h> */
+#include <linux/usb/composite.h>
+#include <linux/usb/uas.h>
+#include <linux/usb/storage.h>
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+
+#define USBG_NAMELEN 32
+
+#define fuas_to_gadget(f) (f->function.config->cdev->gadget)
+#define UASP_SS_EP_COMP_LOG_STREAMS 4
+#define UASP_SS_EP_COMP_NUM_STREAMS (1 << UASP_SS_EP_COMP_LOG_STREAMS)
+
+enum {
+ USB_G_STR_INT_UAS = 0,
+ USB_G_STR_INT_BBB,
+};
+
+#define USB_G_ALT_INT_BBB 0
+#define USB_G_ALT_INT_UAS 1
+
+struct tcm_usbg_nexus {
+ struct se_session *tvn_se_sess;
+};
+
+struct usbg_tpg {
+ struct mutex tpg_mutex;
+ /* SAS port target portal group tag for TCM */
+ u16 tport_tpgt;
+ /* Pointer back to usbg_tport */
+ struct usbg_tport *tport;
+ struct workqueue_struct *workqueue;
+ /* Returned by usbg_make_tpg() */
+ struct se_portal_group se_tpg;
+ u32 gadget_connect;
+ struct tcm_usbg_nexus *tpg_nexus;
+ atomic_t tpg_port_count;
+};
+
+struct usbg_tport {
+ /* Binary World Wide unique Port Name for SAS Target port */
+ u64 tport_wwpn;
+ /* ASCII formatted WWPN for SAS Target port */
+ char tport_name[USBG_NAMELEN];
+ /* Returned by usbg_make_tport() */
+ struct se_wwn tport_wwn;
+};
+
+enum uas_state {
+ UASP_SEND_DATA,
+ UASP_RECEIVE_DATA,
+ UASP_SEND_STATUS,
+ UASP_QUEUE_COMMAND,
+};
+
+#define USBG_MAX_CMD 64
+struct usbg_cmd {
+ /* common */
+ u8 cmd_buf[USBG_MAX_CMD];
+ u32 data_len;
+ struct work_struct work;
+ int unpacked_lun;
+ struct se_cmd se_cmd;
+ void *data_buf; /* used if no sg support available */
+ struct f_uas *fu;
+ struct completion write_complete;
+ struct kref ref;
+
+ /* UAS only */
+ u16 tag;
+ u16 prio_attr;
+ struct sense_iu sense_iu;
+ enum uas_state state;
+ struct uas_stream *stream;
+
+ /* BOT only */
+ __le32 bot_tag;
+ unsigned int csw_code;
+ unsigned is_read:1;
+
+};
+
+struct uas_stream {
+ struct usb_request *req_in;
+ struct usb_request *req_out;
+ struct usb_request *req_status;
+};
+
+struct usbg_cdb {
+ struct usb_request *req;
+ void *buf;
+};
+
+struct bot_status {
+ struct usb_request *req;
+ struct bulk_cs_wrap csw;
+};
+
+struct f_uas {
+ struct usbg_tpg *tpg;
+ struct usb_function function;
+ u16 iface;
+
+ u32 flags;
+#define USBG_ENABLED (1 << 0)
+#define USBG_IS_UAS (1 << 1)
+#define USBG_USE_STREAMS (1 << 2)
+#define USBG_IS_BOT (1 << 3)
+#define USBG_BOT_CMD_PEND (1 << 4)
+
+ struct usbg_cdb cmd;
+ struct usb_ep *ep_in;
+ struct usb_ep *ep_out;
+
+ /* UAS */
+ struct usb_ep *ep_status;
+ struct usb_ep *ep_cmd;
+ struct uas_stream stream[UASP_SS_EP_COMP_NUM_STREAMS];
+
+ /* BOT */
+ struct bot_status bot_status;
+ struct usb_request *bot_req_in;
+ struct usb_request *bot_req_out;
+};
+
+extern struct usbg_tpg *the_only_tpg_I_currently_have;
+
+#endif /* __TARGET_USB_GADGET_H__ */
#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,
+USB_GADGET_COMPOSITE_OPTIONS();
- (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 */
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;
.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;
+++ /dev/null
-#ifndef __TARGET_USB_GADGET_H__
-#define __TARGET_USB_GADGET_H__
-
-#include <linux/kref.h>
-/* #include <linux/usb/uas.h> */
-#include <linux/usb/composite.h>
-#include <linux/usb/uas.h>
-#include <linux/usb/storage.h>
-#include <target/target_core_base.h>
-#include <target/target_core_fabric.h>
-
-#define USBG_NAMELEN 32
-
-#define fuas_to_gadget(f) (f->function.config->cdev->gadget)
-#define UASP_SS_EP_COMP_LOG_STREAMS 4
-#define UASP_SS_EP_COMP_NUM_STREAMS (1 << UASP_SS_EP_COMP_LOG_STREAMS)
-
-enum {
- USB_G_STR_INT_UAS = 0,
- USB_G_STR_INT_BBB,
-};
-
-#define USB_G_ALT_INT_BBB 0
-#define USB_G_ALT_INT_UAS 1
-
-struct tcm_usbg_nexus {
- struct se_session *tvn_se_sess;
-};
-
-struct usbg_tpg {
- struct mutex tpg_mutex;
- /* SAS port target portal group tag for TCM */
- u16 tport_tpgt;
- /* Pointer back to usbg_tport */
- struct usbg_tport *tport;
- struct workqueue_struct *workqueue;
- /* Returned by usbg_make_tpg() */
- struct se_portal_group se_tpg;
- u32 gadget_connect;
- struct tcm_usbg_nexus *tpg_nexus;
- atomic_t tpg_port_count;
-};
-
-struct usbg_tport {
- /* Binary World Wide unique Port Name for SAS Target port */
- u64 tport_wwpn;
- /* ASCII formatted WWPN for SAS Target port */
- char tport_name[USBG_NAMELEN];
- /* Returned by usbg_make_tport() */
- struct se_wwn tport_wwn;
-};
-
-enum uas_state {
- UASP_SEND_DATA,
- UASP_RECEIVE_DATA,
- UASP_SEND_STATUS,
- UASP_QUEUE_COMMAND,
-};
-
-#define USBG_MAX_CMD 64
-struct usbg_cmd {
- /* common */
- u8 cmd_buf[USBG_MAX_CMD];
- u32 data_len;
- struct work_struct work;
- int unpacked_lun;
- struct se_cmd se_cmd;
- void *data_buf; /* used if no sg support available */
- struct f_uas *fu;
- struct completion write_complete;
- struct kref ref;
-
- /* UAS only */
- u16 tag;
- u16 prio_attr;
- struct sense_iu sense_iu;
- enum uas_state state;
- struct uas_stream *stream;
-
- /* BOT only */
- __le32 bot_tag;
- unsigned int csw_code;
- unsigned is_read:1;
-
-};
-
-struct uas_stream {
- struct usb_request *req_in;
- struct usb_request *req_out;
- struct usb_request *req_status;
-};
-
-struct usbg_cdb {
- struct usb_request *req;
- void *buf;
-};
-
-struct bot_status {
- struct usb_request *req;
- struct bulk_cs_wrap csw;
-};
-
-struct f_uas {
- struct usbg_tpg *tpg;
- struct usb_function function;
- u16 iface;
-
- u32 flags;
-#define USBG_ENABLED (1 << 0)
-#define USBG_IS_UAS (1 << 1)
-#define USBG_USE_STREAMS (1 << 2)
-#define USBG_IS_BOT (1 << 3)
-#define USBG_BOT_CMD_PEND (1 << 4)
-
- struct usbg_cdb cmd;
- struct usb_ep *ep_in;
- struct usb_ep *ep_out;
-
- /* UAS */
- struct usb_ep *ep_status;
- struct usb_ep *ep_cmd;
- struct uas_stream stream[UASP_SS_EP_COMP_NUM_STREAMS];
-
- /* BOT */
- struct bot_status bot_status;
- struct usb_request *bot_req_in;
- struct usb_request *bot_req_out;
-};
-
-extern struct usbg_tpg *the_only_tpg_I_currently_have;
-
-#endif
projects / GitHub / LineageOS / G12 / android_kernel_amlogic_linux-4.9.git / commitdiff