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@@ -0,0 +1,2145 @@
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+/* Target based USB-Gadget
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+ *
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+ * UAS protocol handling, target callbacks, configfs handling,
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+ * BBB (USB Mass Storage Class Bulk-Only (BBB) and Transport protocol handling.
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+ *
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+ * Author: Sebastian Andrzej Siewior <bigeasy at linutronix dot de>
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+ * License: GPLv2 as published by FSF.
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+ */
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+#include <linux/kernel.h>
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+#include <linux/module.h>
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+#include <linux/types.h>
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+#include <linux/string.h>
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+#include <linux/configfs.h>
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+#include <linux/ctype.h>
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+#include <linux/usb/ch9.h>
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+#include <linux/usb/composite.h>
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+#include <linux/usb/gadget.h>
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+#include <linux/usb/storage.h>
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+#include <scsi/scsi_tcq.h>
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+#include <target/target_core_base.h>
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+#include <target/target_core_fabric.h>
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+#include <asm/unaligned.h>
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+
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+#include "tcm.h"
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+
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+static inline struct f_uas *to_f_uas(struct usb_function *f)
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+{
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+ return container_of(f, struct f_uas, function);
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+}
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+
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+static void usbg_cmd_release(struct kref *);
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+
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+static inline void usbg_cleanup_cmd(struct usbg_cmd *cmd)
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+{
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+ kref_put(&cmd->ref, usbg_cmd_release);
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+}
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+
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+/* Start bot.c code */
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+
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+static int bot_enqueue_cmd_cbw(struct f_uas *fu)
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+{
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+ int ret;
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+
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+ if (fu->flags & USBG_BOT_CMD_PEND)
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+ return 0;
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+
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+ ret = usb_ep_queue(fu->ep_out, fu->cmd.req, GFP_ATOMIC);
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+ if (!ret)
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+ fu->flags |= USBG_BOT_CMD_PEND;
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+ return ret;
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+}
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+
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+static void bot_status_complete(struct usb_ep *ep, struct usb_request *req)
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+{
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+ struct usbg_cmd *cmd = req->context;
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+ struct f_uas *fu = cmd->fu;
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+
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+ usbg_cleanup_cmd(cmd);
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+ if (req->status < 0) {
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+ pr_err("ERR %s(%d)\n", __func__, __LINE__);
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+ return;
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+ }
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+
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+ /* CSW completed, wait for next CBW */
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+ bot_enqueue_cmd_cbw(fu);
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+}
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+
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+static void bot_enqueue_sense_code(struct f_uas *fu, struct usbg_cmd *cmd)
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+{
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+ struct bulk_cs_wrap *csw = &fu->bot_status.csw;
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+ int ret;
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+ u8 *sense;
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+ unsigned int csw_stat;
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+
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+ csw_stat = cmd->csw_code;
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+
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+ /*
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+ * We can't send SENSE as a response. So we take ASC & ASCQ from our
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+ * sense buffer and queue it and hope the host sends a REQUEST_SENSE
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+ * command where it learns why we failed.
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+ */
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+ sense = cmd->sense_iu.sense;
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+
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+ csw->Tag = cmd->bot_tag;
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+ csw->Status = csw_stat;
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+ fu->bot_status.req->context = cmd;
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+ ret = usb_ep_queue(fu->ep_in, fu->bot_status.req, GFP_ATOMIC);
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+ if (ret)
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+ pr_err("%s(%d) ERR: %d\n", __func__, __LINE__, ret);
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+}
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+
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+static void bot_err_compl(struct usb_ep *ep, struct usb_request *req)
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+{
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+ struct usbg_cmd *cmd = req->context;
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+ struct f_uas *fu = cmd->fu;
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+
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+ if (req->status < 0)
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+ pr_err("ERR %s(%d)\n", __func__, __LINE__);
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+
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+ if (cmd->data_len) {
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+ if (cmd->data_len > ep->maxpacket) {
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+ req->length = ep->maxpacket;
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+ cmd->data_len -= ep->maxpacket;
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+ } else {
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+ req->length = cmd->data_len;
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+ cmd->data_len = 0;
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+ }
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+
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+ usb_ep_queue(ep, req, GFP_ATOMIC);
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+ return;
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+ }
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+ bot_enqueue_sense_code(fu, cmd);
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+}
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+
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+static void bot_send_bad_status(struct usbg_cmd *cmd)
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+{
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+ struct f_uas *fu = cmd->fu;
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+ struct bulk_cs_wrap *csw = &fu->bot_status.csw;
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+ struct usb_request *req;
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+ struct usb_ep *ep;
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+
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+ csw->Residue = cpu_to_le32(cmd->data_len);
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+
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+ if (cmd->data_len) {
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+ if (cmd->is_read) {
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+ ep = fu->ep_in;
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+ req = fu->bot_req_in;
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+ } else {
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+ ep = fu->ep_out;
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+ req = fu->bot_req_out;
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+ }
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+
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+ if (cmd->data_len > fu->ep_in->maxpacket) {
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+ req->length = ep->maxpacket;
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+ cmd->data_len -= ep->maxpacket;
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+ } else {
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+ req->length = cmd->data_len;
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+ cmd->data_len = 0;
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+ }
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+ req->complete = bot_err_compl;
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+ req->context = cmd;
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+ req->buf = fu->cmd.buf;
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+ usb_ep_queue(ep, req, GFP_KERNEL);
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+ } else {
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+ bot_enqueue_sense_code(fu, cmd);
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+ }
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+}
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+
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+static int bot_send_status(struct usbg_cmd *cmd, bool moved_data)
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+{
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+ struct f_uas *fu = cmd->fu;
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+ struct bulk_cs_wrap *csw = &fu->bot_status.csw;
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+ int ret;
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+
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+ if (cmd->se_cmd.scsi_status == SAM_STAT_GOOD) {
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+ if (!moved_data && cmd->data_len) {
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+ /*
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+ * the host wants to move data, we don't. Fill / empty
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+ * the pipe and then send the csw with reside set.
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+ */
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+ cmd->csw_code = US_BULK_STAT_OK;
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+ bot_send_bad_status(cmd);
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+ return 0;
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+ }
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+
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+ csw->Tag = cmd->bot_tag;
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+ csw->Residue = cpu_to_le32(0);
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+ csw->Status = US_BULK_STAT_OK;
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+ fu->bot_status.req->context = cmd;
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+
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+ ret = usb_ep_queue(fu->ep_in, fu->bot_status.req, GFP_KERNEL);
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+ if (ret)
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+ pr_err("%s(%d) ERR: %d\n", __func__, __LINE__, ret);
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+ } else {
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+ cmd->csw_code = US_BULK_STAT_FAIL;
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+ bot_send_bad_status(cmd);
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+ }
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+ return 0;
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+}
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+
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+/*
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+ * Called after command (no data transfer) or after the write (to device)
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+ * operation is completed
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+ */
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+static int bot_send_status_response(struct usbg_cmd *cmd)
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+{
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+ bool moved_data = false;
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+
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+ if (!cmd->is_read)
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+ moved_data = true;
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+ return bot_send_status(cmd, moved_data);
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+}
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+
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+/* Read request completed, now we have to send the CSW */
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+static void bot_read_compl(struct usb_ep *ep, struct usb_request *req)
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+{
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+ struct usbg_cmd *cmd = req->context;
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+
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+ if (req->status < 0)
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+ pr_err("ERR %s(%d)\n", __func__, __LINE__);
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+
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+ bot_send_status(cmd, true);
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+}
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+
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+static int bot_send_read_response(struct usbg_cmd *cmd)
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+{
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+ struct f_uas *fu = cmd->fu;
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+ struct se_cmd *se_cmd = &cmd->se_cmd;
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+ struct usb_gadget *gadget = fuas_to_gadget(fu);
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+ int ret;
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+
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+ if (!cmd->data_len) {
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+ cmd->csw_code = US_BULK_STAT_PHASE;
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+ bot_send_bad_status(cmd);
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+ return 0;
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+ }
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+
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+ if (!gadget->sg_supported) {
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+ cmd->data_buf = kmalloc(se_cmd->data_length, GFP_ATOMIC);
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+ if (!cmd->data_buf)
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+ return -ENOMEM;
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+
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+ sg_copy_to_buffer(se_cmd->t_data_sg,
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+ se_cmd->t_data_nents,
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+ cmd->data_buf,
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+ se_cmd->data_length);
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+
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+ fu->bot_req_in->buf = cmd->data_buf;
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+ } else {
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+ fu->bot_req_in->buf = NULL;
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+ fu->bot_req_in->num_sgs = se_cmd->t_data_nents;
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+ fu->bot_req_in->sg = se_cmd->t_data_sg;
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+ }
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+
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+ fu->bot_req_in->complete = bot_read_compl;
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+ fu->bot_req_in->length = se_cmd->data_length;
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+ fu->bot_req_in->context = cmd;
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+ ret = usb_ep_queue(fu->ep_in, fu->bot_req_in, GFP_ATOMIC);
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+ if (ret)
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+ pr_err("%s(%d)\n", __func__, __LINE__);
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+ return 0;
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+}
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+
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+static void usbg_data_write_cmpl(struct usb_ep *, struct usb_request *);
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+static int usbg_prepare_w_request(struct usbg_cmd *, struct usb_request *);
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+
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+static int bot_send_write_request(struct usbg_cmd *cmd)
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+{
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+ struct f_uas *fu = cmd->fu;
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+ struct se_cmd *se_cmd = &cmd->se_cmd;
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+ struct usb_gadget *gadget = fuas_to_gadget(fu);
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+ int ret;
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+
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+ init_completion(&cmd->write_complete);
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+ cmd->fu = fu;
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+
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+ if (!cmd->data_len) {
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+ cmd->csw_code = US_BULK_STAT_PHASE;
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+ return -EINVAL;
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+ }
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+
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+ if (!gadget->sg_supported) {
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+ cmd->data_buf = kmalloc(se_cmd->data_length, GFP_KERNEL);
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+ if (!cmd->data_buf)
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+ return -ENOMEM;
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+
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+ fu->bot_req_out->buf = cmd->data_buf;
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+ } else {
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+ fu->bot_req_out->buf = NULL;
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+ fu->bot_req_out->num_sgs = se_cmd->t_data_nents;
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+ fu->bot_req_out->sg = se_cmd->t_data_sg;
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+ }
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+
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+ fu->bot_req_out->complete = usbg_data_write_cmpl;
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+ fu->bot_req_out->length = se_cmd->data_length;
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+ fu->bot_req_out->context = cmd;
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+
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+ ret = usbg_prepare_w_request(cmd, fu->bot_req_out);
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+ if (ret)
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+ goto cleanup;
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+ ret = usb_ep_queue(fu->ep_out, fu->bot_req_out, GFP_KERNEL);
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+ if (ret)
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+ pr_err("%s(%d)\n", __func__, __LINE__);
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+
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+ wait_for_completion(&cmd->write_complete);
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+ target_execute_cmd(se_cmd);
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+cleanup:
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+ return ret;
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+}
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+
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+static int bot_submit_command(struct f_uas *, void *, unsigned int);
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+
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+static void bot_cmd_complete(struct usb_ep *ep, struct usb_request *req)
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+{
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+ struct f_uas *fu = req->context;
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+ int ret;
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+
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+ fu->flags &= ~USBG_BOT_CMD_PEND;
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+
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+ if (req->status < 0)
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+ return;
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+
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+ ret = bot_submit_command(fu, req->buf, req->actual);
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+ if (ret)
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+ pr_err("%s(%d): %d\n", __func__, __LINE__, ret);
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+}
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+
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+static int bot_prepare_reqs(struct f_uas *fu)
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+{
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+ int ret;
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+
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+ fu->bot_req_in = usb_ep_alloc_request(fu->ep_in, GFP_KERNEL);
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+ if (!fu->bot_req_in)
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+ goto err;
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+
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+ fu->bot_req_out = usb_ep_alloc_request(fu->ep_out, GFP_KERNEL);
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+ if (!fu->bot_req_out)
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+ goto err_out;
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+
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+ fu->cmd.req = usb_ep_alloc_request(fu->ep_out, GFP_KERNEL);
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+ if (!fu->cmd.req)
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+ goto err_cmd;
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+
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+ fu->bot_status.req = usb_ep_alloc_request(fu->ep_in, GFP_KERNEL);
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+ if (!fu->bot_status.req)
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+ goto err_sts;
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+
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+ fu->bot_status.req->buf = &fu->bot_status.csw;
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+ fu->bot_status.req->length = US_BULK_CS_WRAP_LEN;
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+ fu->bot_status.req->complete = bot_status_complete;
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+ fu->bot_status.csw.Signature = cpu_to_le32(US_BULK_CS_SIGN);
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+
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+ fu->cmd.buf = kmalloc(fu->ep_out->maxpacket, GFP_KERNEL);
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+ if (!fu->cmd.buf)
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+ goto err_buf;
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+
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+ fu->cmd.req->complete = bot_cmd_complete;
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+ fu->cmd.req->buf = fu->cmd.buf;
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+ fu->cmd.req->length = fu->ep_out->maxpacket;
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+ fu->cmd.req->context = fu;
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+
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+ ret = bot_enqueue_cmd_cbw(fu);
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+ if (ret)
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+ goto err_queue;
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+ return 0;
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+err_queue:
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+ kfree(fu->cmd.buf);
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+ fu->cmd.buf = NULL;
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+err_buf:
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+ usb_ep_free_request(fu->ep_in, fu->bot_status.req);
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+err_sts:
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+ usb_ep_free_request(fu->ep_out, fu->cmd.req);
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+ fu->cmd.req = NULL;
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+err_cmd:
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+ usb_ep_free_request(fu->ep_out, fu->bot_req_out);
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+ fu->bot_req_out = NULL;
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+err_out:
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+ usb_ep_free_request(fu->ep_in, fu->bot_req_in);
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+ fu->bot_req_in = NULL;
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+err:
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+ pr_err("BOT: endpoint setup failed\n");
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+ return -ENOMEM;
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+}
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+
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+static void bot_cleanup_old_alt(struct f_uas *fu)
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+{
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+ if (!(fu->flags & USBG_ENABLED))
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+ return;
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+
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+ usb_ep_disable(fu->ep_in);
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+ usb_ep_disable(fu->ep_out);
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+
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+ if (!fu->bot_req_in)
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+ return;
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+
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+ usb_ep_free_request(fu->ep_in, fu->bot_req_in);
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+ usb_ep_free_request(fu->ep_out, fu->bot_req_out);
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+ usb_ep_free_request(fu->ep_out, fu->cmd.req);
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+ usb_ep_free_request(fu->ep_out, fu->bot_status.req);
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+
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+ kfree(fu->cmd.buf);
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+
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+ fu->bot_req_in = NULL;
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+ fu->bot_req_out = NULL;
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+ fu->cmd.req = NULL;
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+ fu->bot_status.req = NULL;
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+ fu->cmd.buf = NULL;
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+}
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+
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+static void bot_set_alt(struct f_uas *fu)
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+{
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+ struct usb_function *f = &fu->function;
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+ struct usb_gadget *gadget = f->config->cdev->gadget;
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+ int ret;
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+
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+ 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;
|
|
|
+}
|
Andrzej Pietrasiewicz